1 /* Perform type resolution on the various structures.
2 Copyright (C) 2001-2020 Free Software Foundation, Inc.
3 Contributed by Andy Vaught
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
23 #include "coretypes.h"
27 #include "arith.h" /* For gfc_compare_expr(). */
28 #include "dependency.h"
30 #include "target-memory.h" /* for gfc_simplify_transfer */
31 #include "constructor.h"
33 /* Types used in equivalence statements. */
37 SEQ_NONDEFAULT
, SEQ_NUMERIC
, SEQ_CHARACTER
, SEQ_MIXED
40 /* Stack to keep track of the nesting of blocks as we move through the
41 code. See resolve_branch() and gfc_resolve_code(). */
43 typedef struct code_stack
45 struct gfc_code
*head
, *current
;
46 struct code_stack
*prev
;
48 /* This bitmap keeps track of the targets valid for a branch from
49 inside this block except for END {IF|SELECT}s of enclosing
51 bitmap reachable_labels
;
55 static code_stack
*cs_base
= NULL
;
58 /* Nonzero if we're inside a FORALL or DO CONCURRENT block. */
60 static int forall_flag
;
61 int gfc_do_concurrent_flag
;
63 /* True when we are resolving an expression that is an actual argument to
65 static bool actual_arg
= false;
66 /* True when we are resolving an expression that is the first actual argument
68 static bool first_actual_arg
= false;
71 /* Nonzero if we're inside a OpenMP WORKSHARE or PARALLEL WORKSHARE block. */
73 static int omp_workshare_flag
;
75 /* True if we are processing a formal arglist. The corresponding function
76 resets the flag each time that it is read. */
77 static bool formal_arg_flag
= false;
79 /* True if we are resolving a specification expression. */
80 static bool specification_expr
= false;
82 /* The id of the last entry seen. */
83 static int current_entry_id
;
85 /* We use bitmaps to determine if a branch target is valid. */
86 static bitmap_obstack labels_obstack
;
88 /* True when simplifying a EXPR_VARIABLE argument to an inquiry function. */
89 static bool inquiry_argument
= false;
93 gfc_is_formal_arg (void)
95 return formal_arg_flag
;
98 /* Is the symbol host associated? */
100 is_sym_host_assoc (gfc_symbol
*sym
, gfc_namespace
*ns
)
102 for (ns
= ns
->parent
; ns
; ns
= ns
->parent
)
111 /* Ensure a typespec used is valid; for instance, TYPE(t) is invalid if t is
112 an ABSTRACT derived-type. If where is not NULL, an error message with that
113 locus is printed, optionally using name. */
116 resolve_typespec_used (gfc_typespec
* ts
, locus
* where
, const char* name
)
118 if (ts
->type
== BT_DERIVED
&& ts
->u
.derived
->attr
.abstract
)
123 gfc_error ("%qs at %L is of the ABSTRACT type %qs",
124 name
, where
, ts
->u
.derived
->name
);
126 gfc_error ("ABSTRACT type %qs used at %L",
127 ts
->u
.derived
->name
, where
);
138 check_proc_interface (gfc_symbol
*ifc
, locus
*where
)
140 /* Several checks for F08:C1216. */
141 if (ifc
->attr
.procedure
)
143 gfc_error ("Interface %qs at %L is declared "
144 "in a later PROCEDURE statement", ifc
->name
, where
);
149 /* For generic interfaces, check if there is
150 a specific procedure with the same name. */
151 gfc_interface
*gen
= ifc
->generic
;
152 while (gen
&& strcmp (gen
->sym
->name
, ifc
->name
) != 0)
156 gfc_error ("Interface %qs at %L may not be generic",
161 if (ifc
->attr
.proc
== PROC_ST_FUNCTION
)
163 gfc_error ("Interface %qs at %L may not be a statement function",
167 if (gfc_is_intrinsic (ifc
, 0, ifc
->declared_at
)
168 || gfc_is_intrinsic (ifc
, 1, ifc
->declared_at
))
169 ifc
->attr
.intrinsic
= 1;
170 if (ifc
->attr
.intrinsic
&& !gfc_intrinsic_actual_ok (ifc
->name
, 0))
172 gfc_error ("Intrinsic procedure %qs not allowed in "
173 "PROCEDURE statement at %L", ifc
->name
, where
);
176 if (!ifc
->attr
.if_source
&& !ifc
->attr
.intrinsic
&& ifc
->name
[0] != '\0')
178 gfc_error ("Interface %qs at %L must be explicit", ifc
->name
, where
);
185 static void resolve_symbol (gfc_symbol
*sym
);
188 /* Resolve the interface for a PROCEDURE declaration or procedure pointer. */
191 resolve_procedure_interface (gfc_symbol
*sym
)
193 gfc_symbol
*ifc
= sym
->ts
.interface
;
200 gfc_error ("PROCEDURE %qs at %L may not be used as its own interface",
201 sym
->name
, &sym
->declared_at
);
204 if (!check_proc_interface (ifc
, &sym
->declared_at
))
207 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
209 /* Resolve interface and copy attributes. */
210 resolve_symbol (ifc
);
211 if (ifc
->attr
.intrinsic
)
212 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
216 sym
->ts
= ifc
->result
->ts
;
217 sym
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
218 sym
->attr
.pointer
= ifc
->result
->attr
.pointer
;
219 sym
->attr
.dimension
= ifc
->result
->attr
.dimension
;
220 sym
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
221 sym
->as
= gfc_copy_array_spec (ifc
->result
->as
);
227 sym
->attr
.allocatable
= ifc
->attr
.allocatable
;
228 sym
->attr
.pointer
= ifc
->attr
.pointer
;
229 sym
->attr
.dimension
= ifc
->attr
.dimension
;
230 sym
->attr
.class_ok
= ifc
->attr
.class_ok
;
231 sym
->as
= gfc_copy_array_spec (ifc
->as
);
233 sym
->ts
.interface
= ifc
;
234 sym
->attr
.function
= ifc
->attr
.function
;
235 sym
->attr
.subroutine
= ifc
->attr
.subroutine
;
237 sym
->attr
.pure
= ifc
->attr
.pure
;
238 sym
->attr
.elemental
= ifc
->attr
.elemental
;
239 sym
->attr
.contiguous
= ifc
->attr
.contiguous
;
240 sym
->attr
.recursive
= ifc
->attr
.recursive
;
241 sym
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
242 sym
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
243 sym
->attr
.is_bind_c
= ifc
->attr
.is_bind_c
;
244 /* Copy char length. */
245 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
247 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
248 if (sym
->ts
.u
.cl
->length
&& !sym
->ts
.u
.cl
->resolved
249 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
258 /* Resolve types of formal argument lists. These have to be done early so that
259 the formal argument lists of module procedures can be copied to the
260 containing module before the individual procedures are resolved
261 individually. We also resolve argument lists of procedures in interface
262 blocks because they are self-contained scoping units.
264 Since a dummy argument cannot be a non-dummy procedure, the only
265 resort left for untyped names are the IMPLICIT types. */
268 gfc_resolve_formal_arglist (gfc_symbol
*proc
)
270 gfc_formal_arglist
*f
;
272 bool saved_specification_expr
;
275 if (proc
->result
!= NULL
)
280 if (gfc_elemental (proc
)
281 || sym
->attr
.pointer
|| sym
->attr
.allocatable
282 || (sym
->as
&& sym
->as
->rank
!= 0))
284 proc
->attr
.always_explicit
= 1;
285 sym
->attr
.always_explicit
= 1;
288 formal_arg_flag
= true;
290 for (f
= proc
->formal
; f
; f
= f
->next
)
298 /* Alternate return placeholder. */
299 if (gfc_elemental (proc
))
300 gfc_error ("Alternate return specifier in elemental subroutine "
301 "%qs at %L is not allowed", proc
->name
,
303 if (proc
->attr
.function
)
304 gfc_error ("Alternate return specifier in function "
305 "%qs at %L is not allowed", proc
->name
,
309 else if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
310 && !resolve_procedure_interface (sym
))
313 if (strcmp (proc
->name
, sym
->name
) == 0)
315 gfc_error ("Self-referential argument "
316 "%qs at %L is not allowed", sym
->name
,
321 if (sym
->attr
.if_source
!= IFSRC_UNKNOWN
)
322 gfc_resolve_formal_arglist (sym
);
324 if (sym
->attr
.subroutine
|| sym
->attr
.external
)
326 if (sym
->attr
.flavor
== FL_UNKNOWN
)
327 gfc_add_flavor (&sym
->attr
, FL_PROCEDURE
, sym
->name
, &sym
->declared_at
);
331 if (sym
->ts
.type
== BT_UNKNOWN
&& !proc
->attr
.intrinsic
332 && (!sym
->attr
.function
|| sym
->result
== sym
))
333 gfc_set_default_type (sym
, 1, sym
->ns
);
336 as
= sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
337 ? CLASS_DATA (sym
)->as
: sym
->as
;
339 saved_specification_expr
= specification_expr
;
340 specification_expr
= true;
341 gfc_resolve_array_spec (as
, 0);
342 specification_expr
= saved_specification_expr
;
344 /* We can't tell if an array with dimension (:) is assumed or deferred
345 shape until we know if it has the pointer or allocatable attributes.
347 if (as
&& as
->rank
> 0 && as
->type
== AS_DEFERRED
348 && ((sym
->ts
.type
!= BT_CLASS
349 && !(sym
->attr
.pointer
|| sym
->attr
.allocatable
))
350 || (sym
->ts
.type
== BT_CLASS
351 && !(CLASS_DATA (sym
)->attr
.class_pointer
352 || CLASS_DATA (sym
)->attr
.allocatable
)))
353 && sym
->attr
.flavor
!= FL_PROCEDURE
)
355 as
->type
= AS_ASSUMED_SHAPE
;
356 for (i
= 0; i
< as
->rank
; i
++)
357 as
->lower
[i
] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
360 if ((as
&& as
->rank
> 0 && as
->type
== AS_ASSUMED_SHAPE
)
361 || (as
&& as
->type
== AS_ASSUMED_RANK
)
362 || sym
->attr
.pointer
|| sym
->attr
.allocatable
|| sym
->attr
.target
363 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
364 && (CLASS_DATA (sym
)->attr
.class_pointer
365 || CLASS_DATA (sym
)->attr
.allocatable
366 || CLASS_DATA (sym
)->attr
.target
))
367 || sym
->attr
.optional
)
369 proc
->attr
.always_explicit
= 1;
371 proc
->result
->attr
.always_explicit
= 1;
374 /* If the flavor is unknown at this point, it has to be a variable.
375 A procedure specification would have already set the type. */
377 if (sym
->attr
.flavor
== FL_UNKNOWN
)
378 gfc_add_flavor (&sym
->attr
, FL_VARIABLE
, sym
->name
, &sym
->declared_at
);
382 if (sym
->attr
.flavor
== FL_PROCEDURE
)
387 gfc_error ("Dummy procedure %qs of PURE procedure at %L must "
388 "also be PURE", sym
->name
, &sym
->declared_at
);
392 else if (!sym
->attr
.pointer
)
394 if (proc
->attr
.function
&& sym
->attr
.intent
!= INTENT_IN
)
397 gfc_notify_std (GFC_STD_F2008
, "Argument %qs"
398 " of pure function %qs at %L with VALUE "
399 "attribute but without INTENT(IN)",
400 sym
->name
, proc
->name
, &sym
->declared_at
);
402 gfc_error ("Argument %qs of pure function %qs at %L must "
403 "be INTENT(IN) or VALUE", sym
->name
, proc
->name
,
407 if (proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_UNKNOWN
)
410 gfc_notify_std (GFC_STD_F2008
, "Argument %qs"
411 " of pure subroutine %qs at %L with VALUE "
412 "attribute but without INTENT", sym
->name
,
413 proc
->name
, &sym
->declared_at
);
415 gfc_error ("Argument %qs of pure subroutine %qs at %L "
416 "must have its INTENT specified or have the "
417 "VALUE attribute", sym
->name
, proc
->name
,
423 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.intent
== INTENT_OUT
)
425 gfc_error ("INTENT(OUT) argument %qs of pure procedure %qs at %L"
426 " may not be polymorphic", sym
->name
, proc
->name
,
432 if (proc
->attr
.implicit_pure
)
434 if (sym
->attr
.flavor
== FL_PROCEDURE
)
437 proc
->attr
.implicit_pure
= 0;
439 else if (!sym
->attr
.pointer
)
441 if (proc
->attr
.function
&& sym
->attr
.intent
!= INTENT_IN
443 proc
->attr
.implicit_pure
= 0;
445 if (proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_UNKNOWN
447 proc
->attr
.implicit_pure
= 0;
451 if (gfc_elemental (proc
))
454 if (sym
->attr
.codimension
455 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
456 && CLASS_DATA (sym
)->attr
.codimension
))
458 gfc_error ("Coarray dummy argument %qs at %L to elemental "
459 "procedure", sym
->name
, &sym
->declared_at
);
463 if (sym
->as
|| (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
464 && CLASS_DATA (sym
)->as
))
466 gfc_error ("Argument %qs of elemental procedure at %L must "
467 "be scalar", sym
->name
, &sym
->declared_at
);
471 if (sym
->attr
.allocatable
472 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
473 && CLASS_DATA (sym
)->attr
.allocatable
))
475 gfc_error ("Argument %qs of elemental procedure at %L cannot "
476 "have the ALLOCATABLE attribute", sym
->name
,
481 if (sym
->attr
.pointer
482 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
483 && CLASS_DATA (sym
)->attr
.class_pointer
))
485 gfc_error ("Argument %qs of elemental procedure at %L cannot "
486 "have the POINTER attribute", sym
->name
,
491 if (sym
->attr
.flavor
== FL_PROCEDURE
)
493 gfc_error ("Dummy procedure %qs not allowed in elemental "
494 "procedure %qs at %L", sym
->name
, proc
->name
,
499 /* Fortran 2008 Corrigendum 1, C1290a. */
500 if (sym
->attr
.intent
== INTENT_UNKNOWN
&& !sym
->attr
.value
)
502 gfc_error ("Argument %qs of elemental procedure %qs at %L must "
503 "have its INTENT specified or have the VALUE "
504 "attribute", sym
->name
, proc
->name
,
510 /* Each dummy shall be specified to be scalar. */
511 if (proc
->attr
.proc
== PROC_ST_FUNCTION
)
515 /* F03:C1263 (R1238) The function-name and each dummy-arg-name
516 shall be specified, explicitly or implicitly, to be scalar. */
517 gfc_error ("Argument '%s' of statement function '%s' at %L "
518 "must be scalar", sym
->name
, proc
->name
,
523 if (sym
->ts
.type
== BT_CHARACTER
)
525 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
526 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
528 gfc_error ("Character-valued argument %qs of statement "
529 "function at %L must have constant length",
530 sym
->name
, &sym
->declared_at
);
536 formal_arg_flag
= false;
540 /* Work function called when searching for symbols that have argument lists
541 associated with them. */
544 find_arglists (gfc_symbol
*sym
)
546 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
|| sym
->ns
!= gfc_current_ns
547 || gfc_fl_struct (sym
->attr
.flavor
) || sym
->attr
.intrinsic
)
550 gfc_resolve_formal_arglist (sym
);
554 /* Given a namespace, resolve all formal argument lists within the namespace.
558 resolve_formal_arglists (gfc_namespace
*ns
)
563 gfc_traverse_ns (ns
, find_arglists
);
568 resolve_contained_fntype (gfc_symbol
*sym
, gfc_namespace
*ns
)
572 if (sym
&& sym
->attr
.flavor
== FL_PROCEDURE
574 && sym
->ns
->parent
->proc_name
575 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_PROCEDURE
576 && !strcmp (sym
->name
, sym
->ns
->parent
->proc_name
->name
))
577 gfc_error ("Contained procedure %qs at %L has the same name as its "
578 "encompassing procedure", sym
->name
, &sym
->declared_at
);
580 /* If this namespace is not a function or an entry master function,
582 if (! sym
|| !(sym
->attr
.function
|| sym
->attr
.flavor
== FL_VARIABLE
)
583 || sym
->attr
.entry_master
)
589 /* Try to find out of what the return type is. */
590 if (sym
->result
->ts
.type
== BT_UNKNOWN
&& sym
->result
->ts
.interface
== NULL
)
592 t
= gfc_set_default_type (sym
->result
, 0, ns
);
594 if (!t
&& !sym
->result
->attr
.untyped
)
596 if (sym
->result
== sym
)
597 gfc_error ("Contained function %qs at %L has no IMPLICIT type",
598 sym
->name
, &sym
->declared_at
);
599 else if (!sym
->result
->attr
.proc_pointer
)
600 gfc_error ("Result %qs of contained function %qs at %L has "
601 "no IMPLICIT type", sym
->result
->name
, sym
->name
,
602 &sym
->result
->declared_at
);
603 sym
->result
->attr
.untyped
= 1;
607 /* Fortran 2008 Draft Standard, page 535, C418, on type-param-value
608 type, lists the only ways a character length value of * can be used:
609 dummy arguments of procedures, named constants, function results and
610 in allocate statements if the allocate_object is an assumed length dummy
611 in external functions. Internal function results and results of module
612 procedures are not on this list, ergo, not permitted. */
614 if (sym
->result
->ts
.type
== BT_CHARACTER
)
616 gfc_charlen
*cl
= sym
->result
->ts
.u
.cl
;
617 if ((!cl
|| !cl
->length
) && !sym
->result
->ts
.deferred
)
619 /* See if this is a module-procedure and adapt error message
622 gcc_assert (ns
->parent
&& ns
->parent
->proc_name
);
623 module_proc
= (ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
);
625 gfc_error (module_proc
626 ? G_("Character-valued module procedure %qs at %L"
627 " must not be assumed length")
628 : G_("Character-valued internal function %qs at %L"
629 " must not be assumed length"),
630 sym
->name
, &sym
->declared_at
);
636 /* Add NEW_ARGS to the formal argument list of PROC, taking care not to
637 introduce duplicates. */
640 merge_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
642 gfc_formal_arglist
*f
, *new_arglist
;
645 for (; new_args
!= NULL
; new_args
= new_args
->next
)
647 new_sym
= new_args
->sym
;
648 /* See if this arg is already in the formal argument list. */
649 for (f
= proc
->formal
; f
; f
= f
->next
)
651 if (new_sym
== f
->sym
)
658 /* Add a new argument. Argument order is not important. */
659 new_arglist
= gfc_get_formal_arglist ();
660 new_arglist
->sym
= new_sym
;
661 new_arglist
->next
= proc
->formal
;
662 proc
->formal
= new_arglist
;
667 /* Flag the arguments that are not present in all entries. */
670 check_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
672 gfc_formal_arglist
*f
, *head
;
675 for (f
= proc
->formal
; f
; f
= f
->next
)
680 for (new_args
= head
; new_args
; new_args
= new_args
->next
)
682 if (new_args
->sym
== f
->sym
)
689 f
->sym
->attr
.not_always_present
= 1;
694 /* Resolve alternate entry points. If a symbol has multiple entry points we
695 create a new master symbol for the main routine, and turn the existing
696 symbol into an entry point. */
699 resolve_entries (gfc_namespace
*ns
)
701 gfc_namespace
*old_ns
;
705 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
706 static int master_count
= 0;
708 if (ns
->proc_name
== NULL
)
711 /* No need to do anything if this procedure doesn't have alternate entry
716 /* We may already have resolved alternate entry points. */
717 if (ns
->proc_name
->attr
.entry_master
)
720 /* If this isn't a procedure something has gone horribly wrong. */
721 gcc_assert (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
);
723 /* Remember the current namespace. */
724 old_ns
= gfc_current_ns
;
728 /* Add the main entry point to the list of entry points. */
729 el
= gfc_get_entry_list ();
730 el
->sym
= ns
->proc_name
;
732 el
->next
= ns
->entries
;
734 ns
->proc_name
->attr
.entry
= 1;
736 /* If it is a module function, it needs to be in the right namespace
737 so that gfc_get_fake_result_decl can gather up the results. The
738 need for this arose in get_proc_name, where these beasts were
739 left in their own namespace, to keep prior references linked to
740 the entry declaration.*/
741 if (ns
->proc_name
->attr
.function
742 && ns
->parent
&& ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
745 /* Do the same for entries where the master is not a module
746 procedure. These are retained in the module namespace because
747 of the module procedure declaration. */
748 for (el
= el
->next
; el
; el
= el
->next
)
749 if (el
->sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
750 && el
->sym
->attr
.mod_proc
)
754 /* Add an entry statement for it. */
755 c
= gfc_get_code (EXEC_ENTRY
);
760 /* Create a new symbol for the master function. */
761 /* Give the internal function a unique name (within this file).
762 Also include the function name so the user has some hope of figuring
763 out what is going on. */
764 snprintf (name
, GFC_MAX_SYMBOL_LEN
, "master.%d.%s",
765 master_count
++, ns
->proc_name
->name
);
766 gfc_get_ha_symbol (name
, &proc
);
767 gcc_assert (proc
!= NULL
);
769 gfc_add_procedure (&proc
->attr
, PROC_INTERNAL
, proc
->name
, NULL
);
770 if (ns
->proc_name
->attr
.subroutine
)
771 gfc_add_subroutine (&proc
->attr
, proc
->name
, NULL
);
775 gfc_typespec
*ts
, *fts
;
776 gfc_array_spec
*as
, *fas
;
777 gfc_add_function (&proc
->attr
, proc
->name
, NULL
);
779 fas
= ns
->entries
->sym
->as
;
780 fas
= fas
? fas
: ns
->entries
->sym
->result
->as
;
781 fts
= &ns
->entries
->sym
->result
->ts
;
782 if (fts
->type
== BT_UNKNOWN
)
783 fts
= gfc_get_default_type (ns
->entries
->sym
->result
->name
, NULL
);
784 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
786 ts
= &el
->sym
->result
->ts
;
788 as
= as
? as
: el
->sym
->result
->as
;
789 if (ts
->type
== BT_UNKNOWN
)
790 ts
= gfc_get_default_type (el
->sym
->result
->name
, NULL
);
792 if (! gfc_compare_types (ts
, fts
)
793 || (el
->sym
->result
->attr
.dimension
794 != ns
->entries
->sym
->result
->attr
.dimension
)
795 || (el
->sym
->result
->attr
.pointer
796 != ns
->entries
->sym
->result
->attr
.pointer
))
798 else if (as
&& fas
&& ns
->entries
->sym
->result
!= el
->sym
->result
799 && gfc_compare_array_spec (as
, fas
) == 0)
800 gfc_error ("Function %s at %L has entries with mismatched "
801 "array specifications", ns
->entries
->sym
->name
,
802 &ns
->entries
->sym
->declared_at
);
803 /* The characteristics need to match and thus both need to have
804 the same string length, i.e. both len=*, or both len=4.
805 Having both len=<variable> is also possible, but difficult to
806 check at compile time. */
807 else if (ts
->type
== BT_CHARACTER
&& ts
->u
.cl
&& fts
->u
.cl
808 && (((ts
->u
.cl
->length
&& !fts
->u
.cl
->length
)
809 ||(!ts
->u
.cl
->length
&& fts
->u
.cl
->length
))
811 && ts
->u
.cl
->length
->expr_type
812 != fts
->u
.cl
->length
->expr_type
)
814 && ts
->u
.cl
->length
->expr_type
== EXPR_CONSTANT
815 && mpz_cmp (ts
->u
.cl
->length
->value
.integer
,
816 fts
->u
.cl
->length
->value
.integer
) != 0)))
817 gfc_notify_std (GFC_STD_GNU
, "Function %s at %L with "
818 "entries returning variables of different "
819 "string lengths", ns
->entries
->sym
->name
,
820 &ns
->entries
->sym
->declared_at
);
825 sym
= ns
->entries
->sym
->result
;
826 /* All result types the same. */
828 if (sym
->attr
.dimension
)
829 gfc_set_array_spec (proc
, gfc_copy_array_spec (sym
->as
), NULL
);
830 if (sym
->attr
.pointer
)
831 gfc_add_pointer (&proc
->attr
, NULL
);
835 /* Otherwise the result will be passed through a union by
837 proc
->attr
.mixed_entry_master
= 1;
838 for (el
= ns
->entries
; el
; el
= el
->next
)
840 sym
= el
->sym
->result
;
841 if (sym
->attr
.dimension
)
843 if (el
== ns
->entries
)
844 gfc_error ("FUNCTION result %s cannot be an array in "
845 "FUNCTION %s at %L", sym
->name
,
846 ns
->entries
->sym
->name
, &sym
->declared_at
);
848 gfc_error ("ENTRY result %s cannot be an array in "
849 "FUNCTION %s at %L", sym
->name
,
850 ns
->entries
->sym
->name
, &sym
->declared_at
);
852 else if (sym
->attr
.pointer
)
854 if (el
== ns
->entries
)
855 gfc_error ("FUNCTION result %s cannot be a POINTER in "
856 "FUNCTION %s at %L", sym
->name
,
857 ns
->entries
->sym
->name
, &sym
->declared_at
);
859 gfc_error ("ENTRY result %s cannot be a POINTER in "
860 "FUNCTION %s at %L", sym
->name
,
861 ns
->entries
->sym
->name
, &sym
->declared_at
);
866 if (ts
->type
== BT_UNKNOWN
)
867 ts
= gfc_get_default_type (sym
->name
, NULL
);
871 if (ts
->kind
== gfc_default_integer_kind
)
875 if (ts
->kind
== gfc_default_real_kind
876 || ts
->kind
== gfc_default_double_kind
)
880 if (ts
->kind
== gfc_default_complex_kind
)
884 if (ts
->kind
== gfc_default_logical_kind
)
888 /* We will issue error elsewhere. */
896 if (el
== ns
->entries
)
897 gfc_error ("FUNCTION result %s cannot be of type %s "
898 "in FUNCTION %s at %L", sym
->name
,
899 gfc_typename (ts
), ns
->entries
->sym
->name
,
902 gfc_error ("ENTRY result %s cannot be of type %s "
903 "in FUNCTION %s at %L", sym
->name
,
904 gfc_typename (ts
), ns
->entries
->sym
->name
,
911 proc
->attr
.access
= ACCESS_PRIVATE
;
912 proc
->attr
.entry_master
= 1;
914 /* Merge all the entry point arguments. */
915 for (el
= ns
->entries
; el
; el
= el
->next
)
916 merge_argument_lists (proc
, el
->sym
->formal
);
918 /* Check the master formal arguments for any that are not
919 present in all entry points. */
920 for (el
= ns
->entries
; el
; el
= el
->next
)
921 check_argument_lists (proc
, el
->sym
->formal
);
923 /* Use the master function for the function body. */
924 ns
->proc_name
= proc
;
926 /* Finalize the new symbols. */
927 gfc_commit_symbols ();
929 /* Restore the original namespace. */
930 gfc_current_ns
= old_ns
;
934 /* Resolve common variables. */
936 resolve_common_vars (gfc_common_head
*common_block
, bool named_common
)
938 gfc_symbol
*csym
= common_block
->head
;
940 for (; csym
; csym
= csym
->common_next
)
942 /* gfc_add_in_common may have been called before, but the reported errors
943 have been ignored to continue parsing.
944 We do the checks again here. */
945 if (!csym
->attr
.use_assoc
)
947 gfc_add_in_common (&csym
->attr
, csym
->name
, &common_block
->where
);
948 gfc_notify_std (GFC_STD_F2018_OBS
, "COMMON block at %L",
949 &common_block
->where
);
952 if (csym
->value
|| csym
->attr
.data
)
954 if (!csym
->ns
->is_block_data
)
955 gfc_notify_std (GFC_STD_GNU
, "Variable %qs at %L is in COMMON "
956 "but only in BLOCK DATA initialization is "
957 "allowed", csym
->name
, &csym
->declared_at
);
958 else if (!named_common
)
959 gfc_notify_std (GFC_STD_GNU
, "Initialized variable %qs at %L is "
960 "in a blank COMMON but initialization is only "
961 "allowed in named common blocks", csym
->name
,
965 if (UNLIMITED_POLY (csym
))
966 gfc_error_now ("%qs in cannot appear in COMMON at %L "
967 "[F2008:C5100]", csym
->name
, &csym
->declared_at
);
969 if (csym
->ts
.type
!= BT_DERIVED
)
972 if (!(csym
->ts
.u
.derived
->attr
.sequence
973 || csym
->ts
.u
.derived
->attr
.is_bind_c
))
974 gfc_error_now ("Derived type variable %qs in COMMON at %L "
975 "has neither the SEQUENCE nor the BIND(C) "
976 "attribute", csym
->name
, &csym
->declared_at
);
977 if (csym
->ts
.u
.derived
->attr
.alloc_comp
)
978 gfc_error_now ("Derived type variable %qs in COMMON at %L "
979 "has an ultimate component that is "
980 "allocatable", csym
->name
, &csym
->declared_at
);
981 if (gfc_has_default_initializer (csym
->ts
.u
.derived
))
982 gfc_error_now ("Derived type variable %qs in COMMON at %L "
983 "may not have default initializer", csym
->name
,
986 if (csym
->attr
.flavor
== FL_UNKNOWN
&& !csym
->attr
.proc_pointer
)
987 gfc_add_flavor (&csym
->attr
, FL_VARIABLE
, csym
->name
, &csym
->declared_at
);
991 /* Resolve common blocks. */
993 resolve_common_blocks (gfc_symtree
*common_root
)
998 if (common_root
== NULL
)
1001 if (common_root
->left
)
1002 resolve_common_blocks (common_root
->left
);
1003 if (common_root
->right
)
1004 resolve_common_blocks (common_root
->right
);
1006 resolve_common_vars (common_root
->n
.common
, true);
1008 /* The common name is a global name - in Fortran 2003 also if it has a
1009 C binding name, since Fortran 2008 only the C binding name is a global
1011 if (!common_root
->n
.common
->binding_label
1012 || gfc_notification_std (GFC_STD_F2008
))
1014 gsym
= gfc_find_gsymbol (gfc_gsym_root
,
1015 common_root
->n
.common
->name
);
1017 if (gsym
&& gfc_notification_std (GFC_STD_F2008
)
1018 && gsym
->type
== GSYM_COMMON
1019 && ((common_root
->n
.common
->binding_label
1020 && (!gsym
->binding_label
1021 || strcmp (common_root
->n
.common
->binding_label
,
1022 gsym
->binding_label
) != 0))
1023 || (!common_root
->n
.common
->binding_label
1024 && gsym
->binding_label
)))
1026 gfc_error ("In Fortran 2003 COMMON %qs block at %L is a global "
1027 "identifier and must thus have the same binding name "
1028 "as the same-named COMMON block at %L: %s vs %s",
1029 common_root
->n
.common
->name
, &common_root
->n
.common
->where
,
1031 common_root
->n
.common
->binding_label
1032 ? common_root
->n
.common
->binding_label
: "(blank)",
1033 gsym
->binding_label
? gsym
->binding_label
: "(blank)");
1037 if (gsym
&& gsym
->type
!= GSYM_COMMON
1038 && !common_root
->n
.common
->binding_label
)
1040 gfc_error ("COMMON block %qs at %L uses the same global identifier "
1042 common_root
->n
.common
->name
, &common_root
->n
.common
->where
,
1046 if (gsym
&& gsym
->type
!= GSYM_COMMON
)
1048 gfc_error ("Fortran 2008: COMMON block %qs with binding label at "
1049 "%L sharing the identifier with global non-COMMON-block "
1050 "entity at %L", common_root
->n
.common
->name
,
1051 &common_root
->n
.common
->where
, &gsym
->where
);
1056 gsym
= gfc_get_gsymbol (common_root
->n
.common
->name
, false);
1057 gsym
->type
= GSYM_COMMON
;
1058 gsym
->where
= common_root
->n
.common
->where
;
1064 if (common_root
->n
.common
->binding_label
)
1066 gsym
= gfc_find_gsymbol (gfc_gsym_root
,
1067 common_root
->n
.common
->binding_label
);
1068 if (gsym
&& gsym
->type
!= GSYM_COMMON
)
1070 gfc_error ("COMMON block at %L with binding label %qs uses the same "
1071 "global identifier as entity at %L",
1072 &common_root
->n
.common
->where
,
1073 common_root
->n
.common
->binding_label
, &gsym
->where
);
1078 gsym
= gfc_get_gsymbol (common_root
->n
.common
->binding_label
, true);
1079 gsym
->type
= GSYM_COMMON
;
1080 gsym
->where
= common_root
->n
.common
->where
;
1086 gfc_find_symbol (common_root
->name
, gfc_current_ns
, 0, &sym
);
1090 if (sym
->attr
.flavor
== FL_PARAMETER
)
1091 gfc_error ("COMMON block %qs at %L is used as PARAMETER at %L",
1092 sym
->name
, &common_root
->n
.common
->where
, &sym
->declared_at
);
1094 if (sym
->attr
.external
)
1095 gfc_error ("COMMON block %qs at %L cannot have the EXTERNAL attribute",
1096 sym
->name
, &common_root
->n
.common
->where
);
1098 if (sym
->attr
.intrinsic
)
1099 gfc_error ("COMMON block %qs at %L is also an intrinsic procedure",
1100 sym
->name
, &common_root
->n
.common
->where
);
1101 else if (sym
->attr
.result
1102 || gfc_is_function_return_value (sym
, gfc_current_ns
))
1103 gfc_notify_std (GFC_STD_F2003
, "COMMON block %qs at %L "
1104 "that is also a function result", sym
->name
,
1105 &common_root
->n
.common
->where
);
1106 else if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.proc
!= PROC_INTERNAL
1107 && sym
->attr
.proc
!= PROC_ST_FUNCTION
)
1108 gfc_notify_std (GFC_STD_F2003
, "COMMON block %qs at %L "
1109 "that is also a global procedure", sym
->name
,
1110 &common_root
->n
.common
->where
);
1114 /* Resolve contained function types. Because contained functions can call one
1115 another, they have to be worked out before any of the contained procedures
1118 The good news is that if a function doesn't already have a type, the only
1119 way it can get one is through an IMPLICIT type or a RESULT variable, because
1120 by definition contained functions are contained namespace they're contained
1121 in, not in a sibling or parent namespace. */
1124 resolve_contained_functions (gfc_namespace
*ns
)
1126 gfc_namespace
*child
;
1129 resolve_formal_arglists (ns
);
1131 for (child
= ns
->contained
; child
; child
= child
->sibling
)
1133 /* Resolve alternate entry points first. */
1134 resolve_entries (child
);
1136 /* Then check function return types. */
1137 resolve_contained_fntype (child
->proc_name
, child
);
1138 for (el
= child
->entries
; el
; el
= el
->next
)
1139 resolve_contained_fntype (el
->sym
, child
);
1145 /* A Parameterized Derived Type constructor must contain values for
1146 the PDT KIND parameters or they must have a default initializer.
1147 Go through the constructor picking out the KIND expressions,
1148 storing them in 'param_list' and then call gfc_get_pdt_instance
1149 to obtain the PDT instance. */
1151 static gfc_actual_arglist
*param_list
, *param_tail
, *param
;
1154 get_pdt_spec_expr (gfc_component
*c
, gfc_expr
*expr
)
1156 param
= gfc_get_actual_arglist ();
1158 param_list
= param_tail
= param
;
1161 param_tail
->next
= param
;
1162 param_tail
= param_tail
->next
;
1165 param_tail
->name
= c
->name
;
1167 param_tail
->expr
= gfc_copy_expr (expr
);
1168 else if (c
->initializer
)
1169 param_tail
->expr
= gfc_copy_expr (c
->initializer
);
1172 param_tail
->spec_type
= SPEC_ASSUMED
;
1173 if (c
->attr
.pdt_kind
)
1175 gfc_error ("The KIND parameter %qs in the PDT constructor "
1176 "at %C has no value", param
->name
);
1185 get_pdt_constructor (gfc_expr
*expr
, gfc_constructor
**constr
,
1186 gfc_symbol
*derived
)
1188 gfc_constructor
*cons
= NULL
;
1189 gfc_component
*comp
;
1192 if (expr
&& expr
->expr_type
== EXPR_STRUCTURE
)
1193 cons
= gfc_constructor_first (expr
->value
.constructor
);
1198 comp
= derived
->components
;
1200 for (; comp
&& cons
; comp
= comp
->next
, cons
= gfc_constructor_next (cons
))
1203 && cons
->expr
->expr_type
== EXPR_STRUCTURE
1204 && comp
->ts
.type
== BT_DERIVED
)
1206 t
= get_pdt_constructor (cons
->expr
, NULL
, comp
->ts
.u
.derived
);
1210 else if (comp
->ts
.type
== BT_DERIVED
)
1212 t
= get_pdt_constructor (NULL
, &cons
, comp
->ts
.u
.derived
);
1216 else if ((comp
->attr
.pdt_kind
|| comp
->attr
.pdt_len
)
1217 && derived
->attr
.pdt_template
)
1219 t
= get_pdt_spec_expr (comp
, cons
->expr
);
1228 static bool resolve_fl_derived0 (gfc_symbol
*sym
);
1229 static bool resolve_fl_struct (gfc_symbol
*sym
);
1232 /* Resolve all of the elements of a structure constructor and make sure that
1233 the types are correct. The 'init' flag indicates that the given
1234 constructor is an initializer. */
1237 resolve_structure_cons (gfc_expr
*expr
, int init
)
1239 gfc_constructor
*cons
;
1240 gfc_component
*comp
;
1246 if (expr
->ts
.type
== BT_DERIVED
|| expr
->ts
.type
== BT_UNION
)
1248 if (expr
->ts
.u
.derived
->attr
.flavor
== FL_DERIVED
)
1249 resolve_fl_derived0 (expr
->ts
.u
.derived
);
1251 resolve_fl_struct (expr
->ts
.u
.derived
);
1253 /* If this is a Parameterized Derived Type template, find the
1254 instance corresponding to the PDT kind parameters. */
1255 if (expr
->ts
.u
.derived
->attr
.pdt_template
)
1258 t
= get_pdt_constructor (expr
, NULL
, expr
->ts
.u
.derived
);
1261 gfc_get_pdt_instance (param_list
, &expr
->ts
.u
.derived
, NULL
);
1263 expr
->param_list
= gfc_copy_actual_arglist (param_list
);
1266 gfc_free_actual_arglist (param_list
);
1268 if (!expr
->ts
.u
.derived
->attr
.pdt_type
)
1273 cons
= gfc_constructor_first (expr
->value
.constructor
);
1275 /* A constructor may have references if it is the result of substituting a
1276 parameter variable. In this case we just pull out the component we
1279 comp
= expr
->ref
->u
.c
.sym
->components
;
1281 comp
= expr
->ts
.u
.derived
->components
;
1283 for (; comp
&& cons
; comp
= comp
->next
, cons
= gfc_constructor_next (cons
))
1290 /* Unions use an EXPR_NULL contrived expression to tell the translation
1291 phase to generate an initializer of the appropriate length.
1293 if (cons
->expr
->ts
.type
== BT_UNION
&& cons
->expr
->expr_type
== EXPR_NULL
)
1296 if (!gfc_resolve_expr (cons
->expr
))
1302 rank
= comp
->as
? comp
->as
->rank
: 0;
1303 if (comp
->ts
.type
== BT_CLASS
1304 && !comp
->ts
.u
.derived
->attr
.unlimited_polymorphic
1305 && CLASS_DATA (comp
)->as
)
1306 rank
= CLASS_DATA (comp
)->as
->rank
;
1308 if (cons
->expr
->expr_type
!= EXPR_NULL
&& rank
!= cons
->expr
->rank
1309 && (comp
->attr
.allocatable
|| cons
->expr
->rank
))
1311 gfc_error ("The rank of the element in the structure "
1312 "constructor at %L does not match that of the "
1313 "component (%d/%d)", &cons
->expr
->where
,
1314 cons
->expr
->rank
, rank
);
1318 /* If we don't have the right type, try to convert it. */
1320 if (!comp
->attr
.proc_pointer
&&
1321 !gfc_compare_types (&cons
->expr
->ts
, &comp
->ts
))
1323 if (strcmp (comp
->name
, "_extends") == 0)
1325 /* Can afford to be brutal with the _extends initializer.
1326 The derived type can get lost because it is PRIVATE
1327 but it is not usage constrained by the standard. */
1328 cons
->expr
->ts
= comp
->ts
;
1330 else if (comp
->attr
.pointer
&& cons
->expr
->ts
.type
!= BT_UNKNOWN
)
1332 gfc_error ("The element in the structure constructor at %L, "
1333 "for pointer component %qs, is %s but should be %s",
1334 &cons
->expr
->where
, comp
->name
,
1335 gfc_basic_typename (cons
->expr
->ts
.type
),
1336 gfc_basic_typename (comp
->ts
.type
));
1341 bool t2
= gfc_convert_type (cons
->expr
, &comp
->ts
, 1);
1347 /* For strings, the length of the constructor should be the same as
1348 the one of the structure, ensure this if the lengths are known at
1349 compile time and when we are dealing with PARAMETER or structure
1351 if (cons
->expr
->ts
.type
== BT_CHARACTER
&& comp
->ts
.u
.cl
1352 && comp
->ts
.u
.cl
->length
1353 && comp
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
1354 && cons
->expr
->ts
.u
.cl
&& cons
->expr
->ts
.u
.cl
->length
1355 && cons
->expr
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
1356 && cons
->expr
->rank
!= 0
1357 && mpz_cmp (cons
->expr
->ts
.u
.cl
->length
->value
.integer
,
1358 comp
->ts
.u
.cl
->length
->value
.integer
) != 0)
1360 if (cons
->expr
->expr_type
== EXPR_VARIABLE
1361 && cons
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
)
1363 /* Wrap the parameter in an array constructor (EXPR_ARRAY)
1364 to make use of the gfc_resolve_character_array_constructor
1365 machinery. The expression is later simplified away to
1366 an array of string literals. */
1367 gfc_expr
*para
= cons
->expr
;
1368 cons
->expr
= gfc_get_expr ();
1369 cons
->expr
->ts
= para
->ts
;
1370 cons
->expr
->where
= para
->where
;
1371 cons
->expr
->expr_type
= EXPR_ARRAY
;
1372 cons
->expr
->rank
= para
->rank
;
1373 cons
->expr
->shape
= gfc_copy_shape (para
->shape
, para
->rank
);
1374 gfc_constructor_append_expr (&cons
->expr
->value
.constructor
,
1375 para
, &cons
->expr
->where
);
1378 if (cons
->expr
->expr_type
== EXPR_ARRAY
)
1380 /* Rely on the cleanup of the namespace to deal correctly with
1381 the old charlen. (There was a block here that attempted to
1382 remove the charlen but broke the chain in so doing.) */
1383 cons
->expr
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1384 cons
->expr
->ts
.u
.cl
->length_from_typespec
= true;
1385 cons
->expr
->ts
.u
.cl
->length
= gfc_copy_expr (comp
->ts
.u
.cl
->length
);
1386 gfc_resolve_character_array_constructor (cons
->expr
);
1390 if (cons
->expr
->expr_type
== EXPR_NULL
1391 && !(comp
->attr
.pointer
|| comp
->attr
.allocatable
1392 || comp
->attr
.proc_pointer
|| comp
->ts
.f90_type
== BT_VOID
1393 || (comp
->ts
.type
== BT_CLASS
1394 && (CLASS_DATA (comp
)->attr
.class_pointer
1395 || CLASS_DATA (comp
)->attr
.allocatable
))))
1398 gfc_error ("The NULL in the structure constructor at %L is "
1399 "being applied to component %qs, which is neither "
1400 "a POINTER nor ALLOCATABLE", &cons
->expr
->where
,
1404 if (comp
->attr
.proc_pointer
&& comp
->ts
.interface
)
1406 /* Check procedure pointer interface. */
1407 gfc_symbol
*s2
= NULL
;
1412 c2
= gfc_get_proc_ptr_comp (cons
->expr
);
1415 s2
= c2
->ts
.interface
;
1418 else if (cons
->expr
->expr_type
== EXPR_FUNCTION
)
1420 s2
= cons
->expr
->symtree
->n
.sym
->result
;
1421 name
= cons
->expr
->symtree
->n
.sym
->result
->name
;
1423 else if (cons
->expr
->expr_type
!= EXPR_NULL
)
1425 s2
= cons
->expr
->symtree
->n
.sym
;
1426 name
= cons
->expr
->symtree
->n
.sym
->name
;
1429 if (s2
&& !gfc_compare_interfaces (comp
->ts
.interface
, s2
, name
, 0, 1,
1430 err
, sizeof (err
), NULL
, NULL
))
1432 gfc_error_opt (0, "Interface mismatch for procedure-pointer "
1433 "component %qs in structure constructor at %L:"
1434 " %s", comp
->name
, &cons
->expr
->where
, err
);
1439 if (!comp
->attr
.pointer
|| comp
->attr
.proc_pointer
1440 || cons
->expr
->expr_type
== EXPR_NULL
)
1443 a
= gfc_expr_attr (cons
->expr
);
1445 if (!a
.pointer
&& !a
.target
)
1448 gfc_error ("The element in the structure constructor at %L, "
1449 "for pointer component %qs should be a POINTER or "
1450 "a TARGET", &cons
->expr
->where
, comp
->name
);
1455 /* F08:C461. Additional checks for pointer initialization. */
1459 gfc_error ("Pointer initialization target at %L "
1460 "must not be ALLOCATABLE", &cons
->expr
->where
);
1465 gfc_error ("Pointer initialization target at %L "
1466 "must have the SAVE attribute", &cons
->expr
->where
);
1470 /* F2003, C1272 (3). */
1471 bool impure
= cons
->expr
->expr_type
== EXPR_VARIABLE
1472 && (gfc_impure_variable (cons
->expr
->symtree
->n
.sym
)
1473 || gfc_is_coindexed (cons
->expr
));
1474 if (impure
&& gfc_pure (NULL
))
1477 gfc_error ("Invalid expression in the structure constructor for "
1478 "pointer component %qs at %L in PURE procedure",
1479 comp
->name
, &cons
->expr
->where
);
1483 gfc_unset_implicit_pure (NULL
);
1490 /****************** Expression name resolution ******************/
1492 /* Returns 0 if a symbol was not declared with a type or
1493 attribute declaration statement, nonzero otherwise. */
1496 was_declared (gfc_symbol
*sym
)
1502 if (!a
.implicit_type
&& sym
->ts
.type
!= BT_UNKNOWN
)
1505 if (a
.allocatable
|| a
.dimension
|| a
.dummy
|| a
.external
|| a
.intrinsic
1506 || a
.optional
|| a
.pointer
|| a
.save
|| a
.target
|| a
.volatile_
1507 || a
.value
|| a
.access
!= ACCESS_UNKNOWN
|| a
.intent
!= INTENT_UNKNOWN
1508 || a
.asynchronous
|| a
.codimension
)
1515 /* Determine if a symbol is generic or not. */
1518 generic_sym (gfc_symbol
*sym
)
1522 if (sym
->attr
.generic
||
1523 (sym
->attr
.intrinsic
&& gfc_generic_intrinsic (sym
->name
)))
1526 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1529 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1536 return generic_sym (s
);
1543 /* Determine if a symbol is specific or not. */
1546 specific_sym (gfc_symbol
*sym
)
1550 if (sym
->attr
.if_source
== IFSRC_IFBODY
1551 || sym
->attr
.proc
== PROC_MODULE
1552 || sym
->attr
.proc
== PROC_INTERNAL
1553 || sym
->attr
.proc
== PROC_ST_FUNCTION
1554 || (sym
->attr
.intrinsic
&& gfc_specific_intrinsic (sym
->name
))
1555 || sym
->attr
.external
)
1558 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1561 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1563 return (s
== NULL
) ? 0 : specific_sym (s
);
1567 /* Figure out if the procedure is specific, generic or unknown. */
1570 { PTYPE_GENERIC
= 1, PTYPE_SPECIFIC
, PTYPE_UNKNOWN
};
1573 procedure_kind (gfc_symbol
*sym
)
1575 if (generic_sym (sym
))
1576 return PTYPE_GENERIC
;
1578 if (specific_sym (sym
))
1579 return PTYPE_SPECIFIC
;
1581 return PTYPE_UNKNOWN
;
1584 /* Check references to assumed size arrays. The flag need_full_assumed_size
1585 is nonzero when matching actual arguments. */
1587 static int need_full_assumed_size
= 0;
1590 check_assumed_size_reference (gfc_symbol
*sym
, gfc_expr
*e
)
1592 if (need_full_assumed_size
|| !(sym
->as
&& sym
->as
->type
== AS_ASSUMED_SIZE
))
1595 /* FIXME: The comparison "e->ref->u.ar.type == AR_FULL" is wrong.
1596 What should it be? */
1597 if (e
->ref
&& (e
->ref
->u
.ar
.end
[e
->ref
->u
.ar
.as
->rank
- 1] == NULL
)
1598 && (e
->ref
->u
.ar
.as
->type
== AS_ASSUMED_SIZE
)
1599 && (e
->ref
->u
.ar
.type
== AR_FULL
))
1601 gfc_error ("The upper bound in the last dimension must "
1602 "appear in the reference to the assumed size "
1603 "array %qs at %L", sym
->name
, &e
->where
);
1610 /* Look for bad assumed size array references in argument expressions
1611 of elemental and array valued intrinsic procedures. Since this is
1612 called from procedure resolution functions, it only recurses at
1616 resolve_assumed_size_actual (gfc_expr
*e
)
1621 switch (e
->expr_type
)
1624 if (e
->symtree
&& check_assumed_size_reference (e
->symtree
->n
.sym
, e
))
1629 if (resolve_assumed_size_actual (e
->value
.op
.op1
)
1630 || resolve_assumed_size_actual (e
->value
.op
.op2
))
1641 /* Check a generic procedure, passed as an actual argument, to see if
1642 there is a matching specific name. If none, it is an error, and if
1643 more than one, the reference is ambiguous. */
1645 count_specific_procs (gfc_expr
*e
)
1652 sym
= e
->symtree
->n
.sym
;
1654 for (p
= sym
->generic
; p
; p
= p
->next
)
1655 if (strcmp (sym
->name
, p
->sym
->name
) == 0)
1657 e
->symtree
= gfc_find_symtree (p
->sym
->ns
->sym_root
,
1663 gfc_error ("%qs at %L is ambiguous", e
->symtree
->n
.sym
->name
,
1667 gfc_error ("GENERIC procedure %qs is not allowed as an actual "
1668 "argument at %L", sym
->name
, &e
->where
);
1674 /* See if a call to sym could possibly be a not allowed RECURSION because of
1675 a missing RECURSIVE declaration. This means that either sym is the current
1676 context itself, or sym is the parent of a contained procedure calling its
1677 non-RECURSIVE containing procedure.
1678 This also works if sym is an ENTRY. */
1681 is_illegal_recursion (gfc_symbol
* sym
, gfc_namespace
* context
)
1683 gfc_symbol
* proc_sym
;
1684 gfc_symbol
* context_proc
;
1685 gfc_namespace
* real_context
;
1687 if (sym
->attr
.flavor
== FL_PROGRAM
1688 || gfc_fl_struct (sym
->attr
.flavor
))
1691 /* If we've got an ENTRY, find real procedure. */
1692 if (sym
->attr
.entry
&& sym
->ns
->entries
)
1693 proc_sym
= sym
->ns
->entries
->sym
;
1697 /* If sym is RECURSIVE, all is well of course. */
1698 if (proc_sym
->attr
.recursive
|| flag_recursive
)
1701 /* Find the context procedure's "real" symbol if it has entries.
1702 We look for a procedure symbol, so recurse on the parents if we don't
1703 find one (like in case of a BLOCK construct). */
1704 for (real_context
= context
; ; real_context
= real_context
->parent
)
1706 /* We should find something, eventually! */
1707 gcc_assert (real_context
);
1709 context_proc
= (real_context
->entries
? real_context
->entries
->sym
1710 : real_context
->proc_name
);
1712 /* In some special cases, there may not be a proc_name, like for this
1714 real(bad_kind()) function foo () ...
1715 when checking the call to bad_kind ().
1716 In these cases, we simply return here and assume that the
1721 if (context_proc
->attr
.flavor
!= FL_LABEL
)
1725 /* A call from sym's body to itself is recursion, of course. */
1726 if (context_proc
== proc_sym
)
1729 /* The same is true if context is a contained procedure and sym the
1731 if (context_proc
->attr
.contained
)
1733 gfc_symbol
* parent_proc
;
1735 gcc_assert (context
->parent
);
1736 parent_proc
= (context
->parent
->entries
? context
->parent
->entries
->sym
1737 : context
->parent
->proc_name
);
1739 if (parent_proc
== proc_sym
)
1747 /* Resolve an intrinsic procedure: Set its function/subroutine attribute,
1748 its typespec and formal argument list. */
1751 gfc_resolve_intrinsic (gfc_symbol
*sym
, locus
*loc
)
1753 gfc_intrinsic_sym
* isym
= NULL
;
1756 if (sym
->resolve_symbol_called
>= 2)
1759 sym
->resolve_symbol_called
= 2;
1761 /* Already resolved. */
1762 if (sym
->from_intmod
&& sym
->ts
.type
!= BT_UNKNOWN
)
1765 /* We already know this one is an intrinsic, so we don't call
1766 gfc_is_intrinsic for full checking but rather use gfc_find_function and
1767 gfc_find_subroutine directly to check whether it is a function or
1770 if (sym
->intmod_sym_id
&& sym
->attr
.subroutine
)
1772 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1773 isym
= gfc_intrinsic_subroutine_by_id (id
);
1775 else if (sym
->intmod_sym_id
)
1777 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1778 isym
= gfc_intrinsic_function_by_id (id
);
1780 else if (!sym
->attr
.subroutine
)
1781 isym
= gfc_find_function (sym
->name
);
1783 if (isym
&& !sym
->attr
.subroutine
)
1785 if (sym
->ts
.type
!= BT_UNKNOWN
&& warn_surprising
1786 && !sym
->attr
.implicit_type
)
1787 gfc_warning (OPT_Wsurprising
,
1788 "Type specified for intrinsic function %qs at %L is"
1789 " ignored", sym
->name
, &sym
->declared_at
);
1791 if (!sym
->attr
.function
&&
1792 !gfc_add_function(&sym
->attr
, sym
->name
, loc
))
1797 else if (isym
|| (isym
= gfc_find_subroutine (sym
->name
)))
1799 if (sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.implicit_type
)
1801 gfc_error ("Intrinsic subroutine %qs at %L shall not have a type"
1802 " specifier", sym
->name
, &sym
->declared_at
);
1806 if (!sym
->attr
.subroutine
&&
1807 !gfc_add_subroutine(&sym
->attr
, sym
->name
, loc
))
1812 gfc_error ("%qs declared INTRINSIC at %L does not exist", sym
->name
,
1817 gfc_copy_formal_args_intr (sym
, isym
, NULL
);
1819 sym
->attr
.pure
= isym
->pure
;
1820 sym
->attr
.elemental
= isym
->elemental
;
1822 /* Check it is actually available in the standard settings. */
1823 if (!gfc_check_intrinsic_standard (isym
, &symstd
, false, sym
->declared_at
))
1825 gfc_error ("The intrinsic %qs declared INTRINSIC at %L is not "
1826 "available in the current standard settings but %s. Use "
1827 "an appropriate %<-std=*%> option or enable "
1828 "%<-fall-intrinsics%> in order to use it.",
1829 sym
->name
, &sym
->declared_at
, symstd
);
1837 /* Resolve a procedure expression, like passing it to a called procedure or as
1838 RHS for a procedure pointer assignment. */
1841 resolve_procedure_expression (gfc_expr
* expr
)
1845 if (expr
->expr_type
!= EXPR_VARIABLE
)
1847 gcc_assert (expr
->symtree
);
1849 sym
= expr
->symtree
->n
.sym
;
1851 if (sym
->attr
.intrinsic
)
1852 gfc_resolve_intrinsic (sym
, &expr
->where
);
1854 if (sym
->attr
.flavor
!= FL_PROCEDURE
1855 || (sym
->attr
.function
&& sym
->result
== sym
))
1858 /* A non-RECURSIVE procedure that is used as procedure expression within its
1859 own body is in danger of being called recursively. */
1860 if (is_illegal_recursion (sym
, gfc_current_ns
))
1861 gfc_warning (0, "Non-RECURSIVE procedure %qs at %L is possibly calling"
1862 " itself recursively. Declare it RECURSIVE or use"
1863 " %<-frecursive%>", sym
->name
, &expr
->where
);
1869 /* Check that name is not a derived type. */
1872 is_dt_name (const char *name
)
1874 gfc_symbol
*dt_list
, *dt_first
;
1876 dt_list
= dt_first
= gfc_derived_types
;
1877 for (; dt_list
; dt_list
= dt_list
->dt_next
)
1879 if (strcmp(dt_list
->name
, name
) == 0)
1881 if (dt_first
== dt_list
->dt_next
)
1888 /* Resolve an actual argument list. Most of the time, this is just
1889 resolving the expressions in the list.
1890 The exception is that we sometimes have to decide whether arguments
1891 that look like procedure arguments are really simple variable
1895 resolve_actual_arglist (gfc_actual_arglist
*arg
, procedure_type ptype
,
1896 bool no_formal_args
)
1899 gfc_symtree
*parent_st
;
1901 gfc_component
*comp
;
1902 int save_need_full_assumed_size
;
1903 bool return_value
= false;
1904 bool actual_arg_sav
= actual_arg
, first_actual_arg_sav
= first_actual_arg
;
1907 first_actual_arg
= true;
1909 for (; arg
; arg
= arg
->next
)
1914 /* Check the label is a valid branching target. */
1917 if (arg
->label
->defined
== ST_LABEL_UNKNOWN
)
1919 gfc_error ("Label %d referenced at %L is never defined",
1920 arg
->label
->value
, &arg
->label
->where
);
1924 first_actual_arg
= false;
1928 if (e
->expr_type
== EXPR_VARIABLE
1929 && e
->symtree
->n
.sym
->attr
.generic
1931 && count_specific_procs (e
) != 1)
1934 if (e
->ts
.type
!= BT_PROCEDURE
)
1936 save_need_full_assumed_size
= need_full_assumed_size
;
1937 if (e
->expr_type
!= EXPR_VARIABLE
)
1938 need_full_assumed_size
= 0;
1939 if (!gfc_resolve_expr (e
))
1941 need_full_assumed_size
= save_need_full_assumed_size
;
1945 /* See if the expression node should really be a variable reference. */
1947 sym
= e
->symtree
->n
.sym
;
1949 if (sym
->attr
.flavor
== FL_PROCEDURE
&& is_dt_name (sym
->name
))
1951 gfc_error ("Derived type %qs is used as an actual "
1952 "argument at %L", sym
->name
, &e
->where
);
1956 if (sym
->attr
.flavor
== FL_PROCEDURE
1957 || sym
->attr
.intrinsic
1958 || sym
->attr
.external
)
1962 /* If a procedure is not already determined to be something else
1963 check if it is intrinsic. */
1964 if (gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, e
->where
))
1965 sym
->attr
.intrinsic
= 1;
1967 if (sym
->attr
.proc
== PROC_ST_FUNCTION
)
1969 gfc_error ("Statement function %qs at %L is not allowed as an "
1970 "actual argument", sym
->name
, &e
->where
);
1973 actual_ok
= gfc_intrinsic_actual_ok (sym
->name
,
1974 sym
->attr
.subroutine
);
1975 if (sym
->attr
.intrinsic
&& actual_ok
== 0)
1977 gfc_error ("Intrinsic %qs at %L is not allowed as an "
1978 "actual argument", sym
->name
, &e
->where
);
1981 if (sym
->attr
.contained
&& !sym
->attr
.use_assoc
1982 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
1984 if (!gfc_notify_std (GFC_STD_F2008
, "Internal procedure %qs is"
1985 " used as actual argument at %L",
1986 sym
->name
, &e
->where
))
1990 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
)
1992 gfc_error ("ELEMENTAL non-INTRINSIC procedure %qs is not "
1993 "allowed as an actual argument at %L", sym
->name
,
1997 /* Check if a generic interface has a specific procedure
1998 with the same name before emitting an error. */
1999 if (sym
->attr
.generic
&& count_specific_procs (e
) != 1)
2002 /* Just in case a specific was found for the expression. */
2003 sym
= e
->symtree
->n
.sym
;
2005 /* If the symbol is the function that names the current (or
2006 parent) scope, then we really have a variable reference. */
2008 if (gfc_is_function_return_value (sym
, sym
->ns
))
2011 /* If all else fails, see if we have a specific intrinsic. */
2012 if (sym
->ts
.type
== BT_UNKNOWN
&& sym
->attr
.intrinsic
)
2014 gfc_intrinsic_sym
*isym
;
2016 isym
= gfc_find_function (sym
->name
);
2017 if (isym
== NULL
|| !isym
->specific
)
2019 gfc_error ("Unable to find a specific INTRINSIC procedure "
2020 "for the reference %qs at %L", sym
->name
,
2025 sym
->attr
.intrinsic
= 1;
2026 sym
->attr
.function
= 1;
2029 if (!gfc_resolve_expr (e
))
2034 /* See if the name is a module procedure in a parent unit. */
2036 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
2039 if (gfc_find_sym_tree (sym
->name
, sym
->ns
->parent
, 1, &parent_st
))
2041 gfc_error ("Symbol %qs at %L is ambiguous", sym
->name
, &e
->where
);
2045 if (parent_st
== NULL
)
2048 sym
= parent_st
->n
.sym
;
2049 e
->symtree
= parent_st
; /* Point to the right thing. */
2051 if (sym
->attr
.flavor
== FL_PROCEDURE
2052 || sym
->attr
.intrinsic
2053 || sym
->attr
.external
)
2055 if (!gfc_resolve_expr (e
))
2061 e
->expr_type
= EXPR_VARIABLE
;
2063 if ((sym
->as
!= NULL
&& sym
->ts
.type
!= BT_CLASS
)
2064 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
2065 && CLASS_DATA (sym
)->as
))
2067 e
->rank
= sym
->ts
.type
== BT_CLASS
2068 ? CLASS_DATA (sym
)->as
->rank
: sym
->as
->rank
;
2069 e
->ref
= gfc_get_ref ();
2070 e
->ref
->type
= REF_ARRAY
;
2071 e
->ref
->u
.ar
.type
= AR_FULL
;
2072 e
->ref
->u
.ar
.as
= sym
->ts
.type
== BT_CLASS
2073 ? CLASS_DATA (sym
)->as
: sym
->as
;
2076 /* Expressions are assigned a default ts.type of BT_PROCEDURE in
2077 primary.c (match_actual_arg). If above code determines that it
2078 is a variable instead, it needs to be resolved as it was not
2079 done at the beginning of this function. */
2080 save_need_full_assumed_size
= need_full_assumed_size
;
2081 if (e
->expr_type
!= EXPR_VARIABLE
)
2082 need_full_assumed_size
= 0;
2083 if (!gfc_resolve_expr (e
))
2085 need_full_assumed_size
= save_need_full_assumed_size
;
2088 /* Check argument list functions %VAL, %LOC and %REF. There is
2089 nothing to do for %REF. */
2090 if (arg
->name
&& arg
->name
[0] == '%')
2092 if (strcmp ("%VAL", arg
->name
) == 0)
2094 if (e
->ts
.type
== BT_CHARACTER
|| e
->ts
.type
== BT_DERIVED
)
2096 gfc_error ("By-value argument at %L is not of numeric "
2103 gfc_error ("By-value argument at %L cannot be an array or "
2104 "an array section", &e
->where
);
2108 /* Intrinsics are still PROC_UNKNOWN here. However,
2109 since same file external procedures are not resolvable
2110 in gfortran, it is a good deal easier to leave them to
2112 if (ptype
!= PROC_UNKNOWN
2113 && ptype
!= PROC_DUMMY
2114 && ptype
!= PROC_EXTERNAL
2115 && ptype
!= PROC_MODULE
)
2117 gfc_error ("By-value argument at %L is not allowed "
2118 "in this context", &e
->where
);
2123 /* Statement functions have already been excluded above. */
2124 else if (strcmp ("%LOC", arg
->name
) == 0
2125 && e
->ts
.type
== BT_PROCEDURE
)
2127 if (e
->symtree
->n
.sym
->attr
.proc
== PROC_INTERNAL
)
2129 gfc_error ("Passing internal procedure at %L by location "
2130 "not allowed", &e
->where
);
2136 comp
= gfc_get_proc_ptr_comp(e
);
2137 if (e
->expr_type
== EXPR_VARIABLE
2138 && comp
&& comp
->attr
.elemental
)
2140 gfc_error ("ELEMENTAL procedure pointer component %qs is not "
2141 "allowed as an actual argument at %L", comp
->name
,
2145 /* Fortran 2008, C1237. */
2146 if (e
->expr_type
== EXPR_VARIABLE
&& gfc_is_coindexed (e
)
2147 && gfc_has_ultimate_pointer (e
))
2149 gfc_error ("Coindexed actual argument at %L with ultimate pointer "
2150 "component", &e
->where
);
2154 first_actual_arg
= false;
2157 return_value
= true;
2160 actual_arg
= actual_arg_sav
;
2161 first_actual_arg
= first_actual_arg_sav
;
2163 return return_value
;
2167 /* Do the checks of the actual argument list that are specific to elemental
2168 procedures. If called with c == NULL, we have a function, otherwise if
2169 expr == NULL, we have a subroutine. */
2172 resolve_elemental_actual (gfc_expr
*expr
, gfc_code
*c
)
2174 gfc_actual_arglist
*arg0
;
2175 gfc_actual_arglist
*arg
;
2176 gfc_symbol
*esym
= NULL
;
2177 gfc_intrinsic_sym
*isym
= NULL
;
2179 gfc_intrinsic_arg
*iformal
= NULL
;
2180 gfc_formal_arglist
*eformal
= NULL
;
2181 bool formal_optional
= false;
2182 bool set_by_optional
= false;
2186 /* Is this an elemental procedure? */
2187 if (expr
&& expr
->value
.function
.actual
!= NULL
)
2189 if (expr
->value
.function
.esym
!= NULL
2190 && expr
->value
.function
.esym
->attr
.elemental
)
2192 arg0
= expr
->value
.function
.actual
;
2193 esym
= expr
->value
.function
.esym
;
2195 else if (expr
->value
.function
.isym
!= NULL
2196 && expr
->value
.function
.isym
->elemental
)
2198 arg0
= expr
->value
.function
.actual
;
2199 isym
= expr
->value
.function
.isym
;
2204 else if (c
&& c
->ext
.actual
!= NULL
)
2206 arg0
= c
->ext
.actual
;
2208 if (c
->resolved_sym
)
2209 esym
= c
->resolved_sym
;
2211 esym
= c
->symtree
->n
.sym
;
2214 if (!esym
->attr
.elemental
)
2220 /* The rank of an elemental is the rank of its array argument(s). */
2221 for (arg
= arg0
; arg
; arg
= arg
->next
)
2223 if (arg
->expr
!= NULL
&& arg
->expr
->rank
!= 0)
2225 rank
= arg
->expr
->rank
;
2226 if (arg
->expr
->expr_type
== EXPR_VARIABLE
2227 && arg
->expr
->symtree
->n
.sym
->attr
.optional
)
2228 set_by_optional
= true;
2230 /* Function specific; set the result rank and shape. */
2234 if (!expr
->shape
&& arg
->expr
->shape
)
2236 expr
->shape
= gfc_get_shape (rank
);
2237 for (i
= 0; i
< rank
; i
++)
2238 mpz_init_set (expr
->shape
[i
], arg
->expr
->shape
[i
]);
2245 /* If it is an array, it shall not be supplied as an actual argument
2246 to an elemental procedure unless an array of the same rank is supplied
2247 as an actual argument corresponding to a nonoptional dummy argument of
2248 that elemental procedure(12.4.1.5). */
2249 formal_optional
= false;
2251 iformal
= isym
->formal
;
2253 eformal
= esym
->formal
;
2255 for (arg
= arg0
; arg
; arg
= arg
->next
)
2259 if (eformal
->sym
&& eformal
->sym
->attr
.optional
)
2260 formal_optional
= true;
2261 eformal
= eformal
->next
;
2263 else if (isym
&& iformal
)
2265 if (iformal
->optional
)
2266 formal_optional
= true;
2267 iformal
= iformal
->next
;
2270 formal_optional
= true;
2272 if (pedantic
&& arg
->expr
!= NULL
2273 && arg
->expr
->expr_type
== EXPR_VARIABLE
2274 && arg
->expr
->symtree
->n
.sym
->attr
.optional
2277 && (set_by_optional
|| arg
->expr
->rank
!= rank
)
2278 && !(isym
&& isym
->id
== GFC_ISYM_CONVERSION
))
2281 gfc_actual_arglist
*a
;
2283 /* Scan the argument list for a non-optional argument with the
2284 same rank as arg. */
2285 for (a
= arg0
; a
; a
= a
->next
)
2287 && a
->expr
->rank
== arg
->expr
->rank
2288 && !a
->expr
->symtree
->n
.sym
->attr
.optional
)
2295 gfc_warning (OPT_Wpedantic
,
2296 "%qs at %L is an array and OPTIONAL; If it is not "
2297 "present, then it cannot be the actual argument of "
2298 "an ELEMENTAL procedure unless there is a non-optional"
2299 " argument with the same rank "
2300 "(Fortran 2018, 15.5.2.12)",
2301 arg
->expr
->symtree
->n
.sym
->name
, &arg
->expr
->where
);
2305 for (arg
= arg0
; arg
; arg
= arg
->next
)
2307 if (arg
->expr
== NULL
|| arg
->expr
->rank
== 0)
2310 /* Being elemental, the last upper bound of an assumed size array
2311 argument must be present. */
2312 if (resolve_assumed_size_actual (arg
->expr
))
2315 /* Elemental procedure's array actual arguments must conform. */
2318 if (!gfc_check_conformance (arg
->expr
, e
, "elemental procedure"))
2325 /* INTENT(OUT) is only allowed for subroutines; if any actual argument
2326 is an array, the intent inout/out variable needs to be also an array. */
2327 if (rank
> 0 && esym
&& expr
== NULL
)
2328 for (eformal
= esym
->formal
, arg
= arg0
; arg
&& eformal
;
2329 arg
= arg
->next
, eformal
= eformal
->next
)
2330 if ((eformal
->sym
->attr
.intent
== INTENT_OUT
2331 || eformal
->sym
->attr
.intent
== INTENT_INOUT
)
2332 && arg
->expr
&& arg
->expr
->rank
== 0)
2334 gfc_error ("Actual argument at %L for INTENT(%s) dummy %qs of "
2335 "ELEMENTAL subroutine %qs is a scalar, but another "
2336 "actual argument is an array", &arg
->expr
->where
,
2337 (eformal
->sym
->attr
.intent
== INTENT_OUT
) ? "OUT"
2338 : "INOUT", eformal
->sym
->name
, esym
->name
);
2345 /* This function does the checking of references to global procedures
2346 as defined in sections 18.1 and 14.1, respectively, of the Fortran
2347 77 and 95 standards. It checks for a gsymbol for the name, making
2348 one if it does not already exist. If it already exists, then the
2349 reference being resolved must correspond to the type of gsymbol.
2350 Otherwise, the new symbol is equipped with the attributes of the
2351 reference. The corresponding code that is called in creating
2352 global entities is parse.c.
2354 In addition, for all but -std=legacy, the gsymbols are used to
2355 check the interfaces of external procedures from the same file.
2356 The namespace of the gsymbol is resolved and then, once this is
2357 done the interface is checked. */
2361 not_in_recursive (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2363 if (!gsym_ns
->proc_name
->attr
.recursive
)
2366 if (sym
->ns
== gsym_ns
)
2369 if (sym
->ns
->parent
&& sym
->ns
->parent
== gsym_ns
)
2376 not_entry_self_reference (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2378 if (gsym_ns
->entries
)
2380 gfc_entry_list
*entry
= gsym_ns
->entries
;
2382 for (; entry
; entry
= entry
->next
)
2384 if (strcmp (sym
->name
, entry
->sym
->name
) == 0)
2386 if (strcmp (gsym_ns
->proc_name
->name
,
2387 sym
->ns
->proc_name
->name
) == 0)
2391 && strcmp (gsym_ns
->proc_name
->name
,
2392 sym
->ns
->parent
->proc_name
->name
) == 0)
2401 /* Check for the requirement of an explicit interface. F08:12.4.2.2. */
2404 gfc_explicit_interface_required (gfc_symbol
*sym
, char *errmsg
, int err_len
)
2406 gfc_formal_arglist
*arg
= gfc_sym_get_dummy_args (sym
);
2408 for ( ; arg
; arg
= arg
->next
)
2413 if (arg
->sym
->attr
.allocatable
) /* (2a) */
2415 strncpy (errmsg
, _("allocatable argument"), err_len
);
2418 else if (arg
->sym
->attr
.asynchronous
)
2420 strncpy (errmsg
, _("asynchronous argument"), err_len
);
2423 else if (arg
->sym
->attr
.optional
)
2425 strncpy (errmsg
, _("optional argument"), err_len
);
2428 else if (arg
->sym
->attr
.pointer
)
2430 strncpy (errmsg
, _("pointer argument"), err_len
);
2433 else if (arg
->sym
->attr
.target
)
2435 strncpy (errmsg
, _("target argument"), err_len
);
2438 else if (arg
->sym
->attr
.value
)
2440 strncpy (errmsg
, _("value argument"), err_len
);
2443 else if (arg
->sym
->attr
.volatile_
)
2445 strncpy (errmsg
, _("volatile argument"), err_len
);
2448 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_SHAPE
) /* (2b) */
2450 strncpy (errmsg
, _("assumed-shape argument"), err_len
);
2453 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_RANK
) /* TS 29113, 6.2. */
2455 strncpy (errmsg
, _("assumed-rank argument"), err_len
);
2458 else if (arg
->sym
->attr
.codimension
) /* (2c) */
2460 strncpy (errmsg
, _("coarray argument"), err_len
);
2463 else if (false) /* (2d) TODO: parametrized derived type */
2465 strncpy (errmsg
, _("parametrized derived type argument"), err_len
);
2468 else if (arg
->sym
->ts
.type
== BT_CLASS
) /* (2e) */
2470 strncpy (errmsg
, _("polymorphic argument"), err_len
);
2473 else if (arg
->sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
2475 strncpy (errmsg
, _("NO_ARG_CHECK attribute"), err_len
);
2478 else if (arg
->sym
->ts
.type
== BT_ASSUMED
)
2480 /* As assumed-type is unlimited polymorphic (cf. above).
2481 See also TS 29113, Note 6.1. */
2482 strncpy (errmsg
, _("assumed-type argument"), err_len
);
2487 if (sym
->attr
.function
)
2489 gfc_symbol
*res
= sym
->result
? sym
->result
: sym
;
2491 if (res
->attr
.dimension
) /* (3a) */
2493 strncpy (errmsg
, _("array result"), err_len
);
2496 else if (res
->attr
.pointer
|| res
->attr
.allocatable
) /* (3b) */
2498 strncpy (errmsg
, _("pointer or allocatable result"), err_len
);
2501 else if (res
->ts
.type
== BT_CHARACTER
&& res
->ts
.u
.cl
2502 && res
->ts
.u
.cl
->length
2503 && res
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
) /* (3c) */
2505 strncpy (errmsg
, _("result with non-constant character length"), err_len
);
2510 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
) /* (4) */
2512 strncpy (errmsg
, _("elemental procedure"), err_len
);
2515 else if (sym
->attr
.is_bind_c
) /* (5) */
2517 strncpy (errmsg
, _("bind(c) procedure"), err_len
);
2526 resolve_global_procedure (gfc_symbol
*sym
, locus
*where
, int sub
)
2530 enum gfc_symbol_type type
;
2533 type
= sub
? GSYM_SUBROUTINE
: GSYM_FUNCTION
;
2535 gsym
= gfc_get_gsymbol (sym
->binding_label
? sym
->binding_label
: sym
->name
,
2536 sym
->binding_label
!= NULL
);
2538 if ((gsym
->type
!= GSYM_UNKNOWN
&& gsym
->type
!= type
))
2539 gfc_global_used (gsym
, where
);
2541 if ((sym
->attr
.if_source
== IFSRC_UNKNOWN
2542 || sym
->attr
.if_source
== IFSRC_IFBODY
)
2543 && gsym
->type
!= GSYM_UNKNOWN
2544 && !gsym
->binding_label
2546 && gsym
->ns
->proc_name
2547 && not_in_recursive (sym
, gsym
->ns
)
2548 && not_entry_self_reference (sym
, gsym
->ns
))
2550 gfc_symbol
*def_sym
;
2551 def_sym
= gsym
->ns
->proc_name
;
2553 if (gsym
->ns
->resolved
!= -1)
2556 /* Resolve the gsymbol namespace if needed. */
2557 if (!gsym
->ns
->resolved
)
2559 gfc_symbol
*old_dt_list
;
2561 /* Stash away derived types so that the backend_decls
2562 do not get mixed up. */
2563 old_dt_list
= gfc_derived_types
;
2564 gfc_derived_types
= NULL
;
2566 gfc_resolve (gsym
->ns
);
2568 /* Store the new derived types with the global namespace. */
2569 if (gfc_derived_types
)
2570 gsym
->ns
->derived_types
= gfc_derived_types
;
2572 /* Restore the derived types of this namespace. */
2573 gfc_derived_types
= old_dt_list
;
2576 /* Make sure that translation for the gsymbol occurs before
2577 the procedure currently being resolved. */
2578 ns
= gfc_global_ns_list
;
2579 for (; ns
&& ns
!= gsym
->ns
; ns
= ns
->sibling
)
2581 if (ns
->sibling
== gsym
->ns
)
2583 ns
->sibling
= gsym
->ns
->sibling
;
2584 gsym
->ns
->sibling
= gfc_global_ns_list
;
2585 gfc_global_ns_list
= gsym
->ns
;
2590 /* This can happen if a binding name has been specified. */
2591 if (gsym
->binding_label
&& gsym
->sym_name
!= def_sym
->name
)
2592 gfc_find_symbol (gsym
->sym_name
, gsym
->ns
, 0, &def_sym
);
2594 if (def_sym
->attr
.entry_master
|| def_sym
->attr
.entry
)
2596 gfc_entry_list
*entry
;
2597 for (entry
= gsym
->ns
->entries
; entry
; entry
= entry
->next
)
2598 if (strcmp (entry
->sym
->name
, sym
->name
) == 0)
2600 def_sym
= entry
->sym
;
2606 if (sym
->attr
.function
&& !gfc_compare_types (&sym
->ts
, &def_sym
->ts
))
2608 gfc_error ("Return type mismatch of function %qs at %L (%s/%s)",
2609 sym
->name
, &sym
->declared_at
, gfc_typename (&sym
->ts
),
2610 gfc_typename (&def_sym
->ts
));
2614 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
2615 && gfc_explicit_interface_required (def_sym
, reason
, sizeof(reason
)))
2617 gfc_error ("Explicit interface required for %qs at %L: %s",
2618 sym
->name
, &sym
->declared_at
, reason
);
2622 bool bad_result_characteristics
;
2623 if (!gfc_compare_interfaces (sym
, def_sym
, sym
->name
, 0, 1,
2624 reason
, sizeof(reason
), NULL
, NULL
,
2625 &bad_result_characteristics
))
2627 /* Turn erros into warnings with -std=gnu and -std=legacy,
2628 unless a function returns a wrong type, which can lead
2629 to all kinds of ICEs and wrong code. */
2631 if (!pedantic
&& (gfc_option
.allow_std
& GFC_STD_GNU
)
2632 && !bad_result_characteristics
)
2633 gfc_errors_to_warnings (true);
2635 gfc_error ("Interface mismatch in global procedure %qs at %L: %s",
2636 sym
->name
, &sym
->declared_at
, reason
);
2637 gfc_errors_to_warnings (false);
2644 if (gsym
->type
== GSYM_UNKNOWN
)
2647 gsym
->where
= *where
;
2654 /************* Function resolution *************/
2656 /* Resolve a function call known to be generic.
2657 Section 14.1.2.4.1. */
2660 resolve_generic_f0 (gfc_expr
*expr
, gfc_symbol
*sym
)
2664 if (sym
->attr
.generic
)
2666 s
= gfc_search_interface (sym
->generic
, 0, &expr
->value
.function
.actual
);
2669 expr
->value
.function
.name
= s
->name
;
2670 expr
->value
.function
.esym
= s
;
2672 if (s
->ts
.type
!= BT_UNKNOWN
)
2674 else if (s
->result
!= NULL
&& s
->result
->ts
.type
!= BT_UNKNOWN
)
2675 expr
->ts
= s
->result
->ts
;
2678 expr
->rank
= s
->as
->rank
;
2679 else if (s
->result
!= NULL
&& s
->result
->as
!= NULL
)
2680 expr
->rank
= s
->result
->as
->rank
;
2682 gfc_set_sym_referenced (expr
->value
.function
.esym
);
2687 /* TODO: Need to search for elemental references in generic
2691 if (sym
->attr
.intrinsic
)
2692 return gfc_intrinsic_func_interface (expr
, 0);
2699 resolve_generic_f (gfc_expr
*expr
)
2703 gfc_interface
*intr
= NULL
;
2705 sym
= expr
->symtree
->n
.sym
;
2709 m
= resolve_generic_f0 (expr
, sym
);
2712 else if (m
== MATCH_ERROR
)
2717 for (intr
= sym
->generic
; intr
; intr
= intr
->next
)
2718 if (gfc_fl_struct (intr
->sym
->attr
.flavor
))
2721 if (sym
->ns
->parent
== NULL
)
2723 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2727 if (!generic_sym (sym
))
2731 /* Last ditch attempt. See if the reference is to an intrinsic
2732 that possesses a matching interface. 14.1.2.4 */
2733 if (sym
&& !intr
&& !gfc_is_intrinsic (sym
, 0, expr
->where
))
2735 if (gfc_init_expr_flag
)
2736 gfc_error ("Function %qs in initialization expression at %L "
2737 "must be an intrinsic function",
2738 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2740 gfc_error ("There is no specific function for the generic %qs "
2741 "at %L", expr
->symtree
->n
.sym
->name
, &expr
->where
);
2747 if (!gfc_convert_to_structure_constructor (expr
, intr
->sym
, NULL
,
2750 if (!gfc_use_derived (expr
->ts
.u
.derived
))
2752 return resolve_structure_cons (expr
, 0);
2755 m
= gfc_intrinsic_func_interface (expr
, 0);
2760 gfc_error ("Generic function %qs at %L is not consistent with a "
2761 "specific intrinsic interface", expr
->symtree
->n
.sym
->name
,
2768 /* Resolve a function call known to be specific. */
2771 resolve_specific_f0 (gfc_symbol
*sym
, gfc_expr
*expr
)
2775 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
2777 if (sym
->attr
.dummy
)
2779 sym
->attr
.proc
= PROC_DUMMY
;
2783 sym
->attr
.proc
= PROC_EXTERNAL
;
2787 if (sym
->attr
.proc
== PROC_MODULE
2788 || sym
->attr
.proc
== PROC_ST_FUNCTION
2789 || sym
->attr
.proc
== PROC_INTERNAL
)
2792 if (sym
->attr
.intrinsic
)
2794 m
= gfc_intrinsic_func_interface (expr
, 1);
2798 gfc_error ("Function %qs at %L is INTRINSIC but is not compatible "
2799 "with an intrinsic", sym
->name
, &expr
->where
);
2807 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2810 expr
->ts
= sym
->result
->ts
;
2813 expr
->value
.function
.name
= sym
->name
;
2814 expr
->value
.function
.esym
= sym
;
2815 /* Prevent crash when sym->ts.u.derived->components is not set due to previous
2817 if (sym
->ts
.type
== BT_CLASS
&& !CLASS_DATA (sym
))
2819 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)
2820 expr
->rank
= CLASS_DATA (sym
)->as
->rank
;
2821 else if (sym
->as
!= NULL
)
2822 expr
->rank
= sym
->as
->rank
;
2829 resolve_specific_f (gfc_expr
*expr
)
2834 sym
= expr
->symtree
->n
.sym
;
2838 m
= resolve_specific_f0 (sym
, expr
);
2841 if (m
== MATCH_ERROR
)
2844 if (sym
->ns
->parent
== NULL
)
2847 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2853 gfc_error ("Unable to resolve the specific function %qs at %L",
2854 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2859 /* Recursively append candidate SYM to CANDIDATES. Store the number of
2860 candidates in CANDIDATES_LEN. */
2863 lookup_function_fuzzy_find_candidates (gfc_symtree
*sym
,
2865 size_t &candidates_len
)
2871 if ((sym
->n
.sym
->ts
.type
!= BT_UNKNOWN
|| sym
->n
.sym
->attr
.external
)
2872 && sym
->n
.sym
->attr
.flavor
== FL_PROCEDURE
)
2873 vec_push (candidates
, candidates_len
, sym
->name
);
2877 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2881 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2885 /* Lookup function FN fuzzily, taking names in SYMROOT into account. */
2888 gfc_lookup_function_fuzzy (const char *fn
, gfc_symtree
*symroot
)
2890 char **candidates
= NULL
;
2891 size_t candidates_len
= 0;
2892 lookup_function_fuzzy_find_candidates (symroot
, candidates
, candidates_len
);
2893 return gfc_closest_fuzzy_match (fn
, candidates
);
2897 /* Resolve a procedure call not known to be generic nor specific. */
2900 resolve_unknown_f (gfc_expr
*expr
)
2905 sym
= expr
->symtree
->n
.sym
;
2907 if (sym
->attr
.dummy
)
2909 sym
->attr
.proc
= PROC_DUMMY
;
2910 expr
->value
.function
.name
= sym
->name
;
2914 /* See if we have an intrinsic function reference. */
2916 if (gfc_is_intrinsic (sym
, 0, expr
->where
))
2918 if (gfc_intrinsic_func_interface (expr
, 1) == MATCH_YES
)
2923 /* The reference is to an external name. */
2925 sym
->attr
.proc
= PROC_EXTERNAL
;
2926 expr
->value
.function
.name
= sym
->name
;
2927 expr
->value
.function
.esym
= expr
->symtree
->n
.sym
;
2929 if (sym
->as
!= NULL
)
2930 expr
->rank
= sym
->as
->rank
;
2932 /* Type of the expression is either the type of the symbol or the
2933 default type of the symbol. */
2936 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2938 if (sym
->ts
.type
!= BT_UNKNOWN
)
2942 ts
= gfc_get_default_type (sym
->name
, sym
->ns
);
2944 if (ts
->type
== BT_UNKNOWN
)
2947 = gfc_lookup_function_fuzzy (sym
->name
, sym
->ns
->sym_root
);
2949 gfc_error ("Function %qs at %L has no IMPLICIT type"
2950 "; did you mean %qs?",
2951 sym
->name
, &expr
->where
, guessed
);
2953 gfc_error ("Function %qs at %L has no IMPLICIT type",
2954 sym
->name
, &expr
->where
);
2965 /* Return true, if the symbol is an external procedure. */
2967 is_external_proc (gfc_symbol
*sym
)
2969 if (!sym
->attr
.dummy
&& !sym
->attr
.contained
2970 && !gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, sym
->declared_at
)
2971 && sym
->attr
.proc
!= PROC_ST_FUNCTION
2972 && !sym
->attr
.proc_pointer
2973 && !sym
->attr
.use_assoc
2981 /* Figure out if a function reference is pure or not. Also set the name
2982 of the function for a potential error message. Return nonzero if the
2983 function is PURE, zero if not. */
2985 pure_stmt_function (gfc_expr
*, gfc_symbol
*);
2988 gfc_pure_function (gfc_expr
*e
, const char **name
)
2991 gfc_component
*comp
;
2995 if (e
->symtree
!= NULL
2996 && e
->symtree
->n
.sym
!= NULL
2997 && e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
2998 return pure_stmt_function (e
, e
->symtree
->n
.sym
);
3000 comp
= gfc_get_proc_ptr_comp (e
);
3003 pure
= gfc_pure (comp
->ts
.interface
);
3006 else if (e
->value
.function
.esym
)
3008 pure
= gfc_pure (e
->value
.function
.esym
);
3009 *name
= e
->value
.function
.esym
->name
;
3011 else if (e
->value
.function
.isym
)
3013 pure
= e
->value
.function
.isym
->pure
3014 || e
->value
.function
.isym
->elemental
;
3015 *name
= e
->value
.function
.isym
->name
;
3019 /* Implicit functions are not pure. */
3021 *name
= e
->value
.function
.name
;
3028 /* Check if the expression is a reference to an implicitly pure function. */
3031 gfc_implicit_pure_function (gfc_expr
*e
)
3033 gfc_component
*comp
= gfc_get_proc_ptr_comp (e
);
3035 return gfc_implicit_pure (comp
->ts
.interface
);
3036 else if (e
->value
.function
.esym
)
3037 return gfc_implicit_pure (e
->value
.function
.esym
);
3044 impure_stmt_fcn (gfc_expr
*e
, gfc_symbol
*sym
,
3045 int *f ATTRIBUTE_UNUSED
)
3049 /* Don't bother recursing into other statement functions
3050 since they will be checked individually for purity. */
3051 if (e
->expr_type
!= EXPR_FUNCTION
3053 || e
->symtree
->n
.sym
== sym
3054 || e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
3057 return gfc_pure_function (e
, &name
) ? false : true;
3062 pure_stmt_function (gfc_expr
*e
, gfc_symbol
*sym
)
3064 return gfc_traverse_expr (e
, sym
, impure_stmt_fcn
, 0) ? 0 : 1;
3068 /* Check if an impure function is allowed in the current context. */
3070 static bool check_pure_function (gfc_expr
*e
)
3072 const char *name
= NULL
;
3073 if (!gfc_pure_function (e
, &name
) && name
)
3077 gfc_error ("Reference to impure function %qs at %L inside a "
3078 "FORALL %s", name
, &e
->where
,
3079 forall_flag
== 2 ? "mask" : "block");
3082 else if (gfc_do_concurrent_flag
)
3084 gfc_error ("Reference to impure function %qs at %L inside a "
3085 "DO CONCURRENT %s", name
, &e
->where
,
3086 gfc_do_concurrent_flag
== 2 ? "mask" : "block");
3089 else if (gfc_pure (NULL
))
3091 gfc_error ("Reference to impure function %qs at %L "
3092 "within a PURE procedure", name
, &e
->where
);
3095 if (!gfc_implicit_pure_function (e
))
3096 gfc_unset_implicit_pure (NULL
);
3102 /* Update current procedure's array_outer_dependency flag, considering
3103 a call to procedure SYM. */
3106 update_current_proc_array_outer_dependency (gfc_symbol
*sym
)
3108 /* Check to see if this is a sibling function that has not yet
3110 gfc_namespace
*sibling
= gfc_current_ns
->sibling
;
3111 for (; sibling
; sibling
= sibling
->sibling
)
3113 if (sibling
->proc_name
== sym
)
3115 gfc_resolve (sibling
);
3120 /* If SYM has references to outer arrays, so has the procedure calling
3121 SYM. If SYM is a procedure pointer, we can assume the worst. */
3122 if ((sym
->attr
.array_outer_dependency
|| sym
->attr
.proc_pointer
)
3123 && gfc_current_ns
->proc_name
)
3124 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3128 /* Resolve a function call, which means resolving the arguments, then figuring
3129 out which entity the name refers to. */
3132 resolve_function (gfc_expr
*expr
)
3134 gfc_actual_arglist
*arg
;
3138 procedure_type p
= PROC_INTRINSIC
;
3139 bool no_formal_args
;
3143 sym
= expr
->symtree
->n
.sym
;
3145 /* If this is a procedure pointer component, it has already been resolved. */
3146 if (gfc_is_proc_ptr_comp (expr
))
3149 /* Avoid re-resolving the arguments of caf_get, which can lead to inserting
3151 if (sym
&& sym
->attr
.intrinsic
3152 && (sym
->intmod_sym_id
== GFC_ISYM_CAF_GET
3153 || sym
->intmod_sym_id
== GFC_ISYM_CAF_SEND
))
3158 gfc_error ("Unexpected junk after %qs at %L", expr
->symtree
->n
.sym
->name
,
3163 if (sym
&& sym
->attr
.intrinsic
3164 && !gfc_resolve_intrinsic (sym
, &expr
->where
))
3167 if (sym
&& (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.subroutine
))
3169 gfc_error ("%qs at %L is not a function", sym
->name
, &expr
->where
);
3173 /* If this is a deferred TBP with an abstract interface (which may
3174 of course be referenced), expr->value.function.esym will be set. */
3175 if (sym
&& sym
->attr
.abstract
&& !expr
->value
.function
.esym
)
3177 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3178 sym
->name
, &expr
->where
);
3182 /* If this is a deferred TBP with an abstract interface, its result
3183 cannot be an assumed length character (F2003: C418). */
3184 if (sym
&& sym
->attr
.abstract
&& sym
->attr
.function
3185 && sym
->result
->ts
.u
.cl
3186 && sym
->result
->ts
.u
.cl
->length
== NULL
3187 && !sym
->result
->ts
.deferred
)
3189 gfc_error ("ABSTRACT INTERFACE %qs at %L must not have an assumed "
3190 "character length result (F2008: C418)", sym
->name
,
3195 /* Switch off assumed size checking and do this again for certain kinds
3196 of procedure, once the procedure itself is resolved. */
3197 need_full_assumed_size
++;
3199 if (expr
->symtree
&& expr
->symtree
->n
.sym
)
3200 p
= expr
->symtree
->n
.sym
->attr
.proc
;
3202 if (expr
->value
.function
.isym
&& expr
->value
.function
.isym
->inquiry
)
3203 inquiry_argument
= true;
3204 no_formal_args
= sym
&& is_external_proc (sym
)
3205 && gfc_sym_get_dummy_args (sym
) == NULL
;
3207 if (!resolve_actual_arglist (expr
->value
.function
.actual
,
3210 inquiry_argument
= false;
3214 inquiry_argument
= false;
3216 /* Resume assumed_size checking. */
3217 need_full_assumed_size
--;
3219 /* If the procedure is external, check for usage. */
3220 if (sym
&& is_external_proc (sym
))
3221 resolve_global_procedure (sym
, &expr
->where
, 0);
3223 if (sym
&& sym
->ts
.type
== BT_CHARACTER
3225 && sym
->ts
.u
.cl
->length
== NULL
3227 && !sym
->ts
.deferred
3228 && expr
->value
.function
.esym
== NULL
3229 && !sym
->attr
.contained
)
3231 /* Internal procedures are taken care of in resolve_contained_fntype. */
3232 gfc_error ("Function %qs is declared CHARACTER(*) and cannot "
3233 "be used at %L since it is not a dummy argument",
3234 sym
->name
, &expr
->where
);
3238 /* See if function is already resolved. */
3240 if (expr
->value
.function
.name
!= NULL
3241 || expr
->value
.function
.isym
!= NULL
)
3243 if (expr
->ts
.type
== BT_UNKNOWN
)
3249 /* Apply the rules of section 14.1.2. */
3251 switch (procedure_kind (sym
))
3254 t
= resolve_generic_f (expr
);
3257 case PTYPE_SPECIFIC
:
3258 t
= resolve_specific_f (expr
);
3262 t
= resolve_unknown_f (expr
);
3266 gfc_internal_error ("resolve_function(): bad function type");
3270 /* If the expression is still a function (it might have simplified),
3271 then we check to see if we are calling an elemental function. */
3273 if (expr
->expr_type
!= EXPR_FUNCTION
)
3276 /* Walk the argument list looking for invalid BOZ. */
3277 for (arg
= expr
->value
.function
.actual
; arg
; arg
= arg
->next
)
3278 if (arg
->expr
&& arg
->expr
->ts
.type
== BT_BOZ
)
3280 gfc_error ("A BOZ literal constant at %L cannot appear as an "
3281 "actual argument in a function reference",
3286 temp
= need_full_assumed_size
;
3287 need_full_assumed_size
= 0;
3289 if (!resolve_elemental_actual (expr
, NULL
))
3292 if (omp_workshare_flag
3293 && expr
->value
.function
.esym
3294 && ! gfc_elemental (expr
->value
.function
.esym
))
3296 gfc_error ("User defined non-ELEMENTAL function %qs at %L not allowed "
3297 "in WORKSHARE construct", expr
->value
.function
.esym
->name
,
3302 #define GENERIC_ID expr->value.function.isym->id
3303 else if (expr
->value
.function
.actual
!= NULL
3304 && expr
->value
.function
.isym
!= NULL
3305 && GENERIC_ID
!= GFC_ISYM_LBOUND
3306 && GENERIC_ID
!= GFC_ISYM_LCOBOUND
3307 && GENERIC_ID
!= GFC_ISYM_UCOBOUND
3308 && GENERIC_ID
!= GFC_ISYM_LEN
3309 && GENERIC_ID
!= GFC_ISYM_LOC
3310 && GENERIC_ID
!= GFC_ISYM_C_LOC
3311 && GENERIC_ID
!= GFC_ISYM_PRESENT
)
3313 /* Array intrinsics must also have the last upper bound of an
3314 assumed size array argument. UBOUND and SIZE have to be
3315 excluded from the check if the second argument is anything
3318 for (arg
= expr
->value
.function
.actual
; arg
; arg
= arg
->next
)
3320 if ((GENERIC_ID
== GFC_ISYM_UBOUND
|| GENERIC_ID
== GFC_ISYM_SIZE
)
3321 && arg
== expr
->value
.function
.actual
3322 && arg
->next
!= NULL
&& arg
->next
->expr
)
3324 if (arg
->next
->expr
->expr_type
!= EXPR_CONSTANT
)
3327 if (arg
->next
->name
&& strcmp (arg
->next
->name
, "kind") == 0)
3330 if ((int)mpz_get_si (arg
->next
->expr
->value
.integer
)
3335 if (arg
->expr
!= NULL
3336 && arg
->expr
->rank
> 0
3337 && resolve_assumed_size_actual (arg
->expr
))
3343 need_full_assumed_size
= temp
;
3345 if (!check_pure_function(expr
))
3348 /* Functions without the RECURSIVE attribution are not allowed to
3349 * call themselves. */
3350 if (expr
->value
.function
.esym
&& !expr
->value
.function
.esym
->attr
.recursive
)
3353 esym
= expr
->value
.function
.esym
;
3355 if (is_illegal_recursion (esym
, gfc_current_ns
))
3357 if (esym
->attr
.entry
&& esym
->ns
->entries
)
3358 gfc_error ("ENTRY %qs at %L cannot be called recursively, as"
3359 " function %qs is not RECURSIVE",
3360 esym
->name
, &expr
->where
, esym
->ns
->entries
->sym
->name
);
3362 gfc_error ("Function %qs at %L cannot be called recursively, as it"
3363 " is not RECURSIVE", esym
->name
, &expr
->where
);
3369 /* Character lengths of use associated functions may contains references to
3370 symbols not referenced from the current program unit otherwise. Make sure
3371 those symbols are marked as referenced. */
3373 if (expr
->ts
.type
== BT_CHARACTER
&& expr
->value
.function
.esym
3374 && expr
->value
.function
.esym
->attr
.use_assoc
)
3376 gfc_expr_set_symbols_referenced (expr
->ts
.u
.cl
->length
);
3379 /* Make sure that the expression has a typespec that works. */
3380 if (expr
->ts
.type
== BT_UNKNOWN
)
3382 if (expr
->symtree
->n
.sym
->result
3383 && expr
->symtree
->n
.sym
->result
->ts
.type
!= BT_UNKNOWN
3384 && !expr
->symtree
->n
.sym
->result
->attr
.proc_pointer
)
3385 expr
->ts
= expr
->symtree
->n
.sym
->result
->ts
;
3388 if (!expr
->ref
&& !expr
->value
.function
.isym
)
3390 if (expr
->value
.function
.esym
)
3391 update_current_proc_array_outer_dependency (expr
->value
.function
.esym
);
3393 update_current_proc_array_outer_dependency (sym
);
3396 /* typebound procedure: Assume the worst. */
3397 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3403 /************* Subroutine resolution *************/
3406 pure_subroutine (gfc_symbol
*sym
, const char *name
, locus
*loc
)
3413 gfc_error ("Subroutine call to %qs in FORALL block at %L is not PURE",
3417 else if (gfc_do_concurrent_flag
)
3419 gfc_error ("Subroutine call to %qs in DO CONCURRENT block at %L is not "
3423 else if (gfc_pure (NULL
))
3425 gfc_error ("Subroutine call to %qs at %L is not PURE", name
, loc
);
3429 gfc_unset_implicit_pure (NULL
);
3435 resolve_generic_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3439 if (sym
->attr
.generic
)
3441 s
= gfc_search_interface (sym
->generic
, 1, &c
->ext
.actual
);
3444 c
->resolved_sym
= s
;
3445 if (!pure_subroutine (s
, s
->name
, &c
->loc
))
3450 /* TODO: Need to search for elemental references in generic interface. */
3453 if (sym
->attr
.intrinsic
)
3454 return gfc_intrinsic_sub_interface (c
, 0);
3461 resolve_generic_s (gfc_code
*c
)
3466 sym
= c
->symtree
->n
.sym
;
3470 m
= resolve_generic_s0 (c
, sym
);
3473 else if (m
== MATCH_ERROR
)
3477 if (sym
->ns
->parent
== NULL
)
3479 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3483 if (!generic_sym (sym
))
3487 /* Last ditch attempt. See if the reference is to an intrinsic
3488 that possesses a matching interface. 14.1.2.4 */
3489 sym
= c
->symtree
->n
.sym
;
3491 if (!gfc_is_intrinsic (sym
, 1, c
->loc
))
3493 gfc_error ("There is no specific subroutine for the generic %qs at %L",
3494 sym
->name
, &c
->loc
);
3498 m
= gfc_intrinsic_sub_interface (c
, 0);
3502 gfc_error ("Generic subroutine %qs at %L is not consistent with an "
3503 "intrinsic subroutine interface", sym
->name
, &c
->loc
);
3509 /* Resolve a subroutine call known to be specific. */
3512 resolve_specific_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3516 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
3518 if (sym
->attr
.dummy
)
3520 sym
->attr
.proc
= PROC_DUMMY
;
3524 sym
->attr
.proc
= PROC_EXTERNAL
;
3528 if (sym
->attr
.proc
== PROC_MODULE
|| sym
->attr
.proc
== PROC_INTERNAL
)
3531 if (sym
->attr
.intrinsic
)
3533 m
= gfc_intrinsic_sub_interface (c
, 1);
3537 gfc_error ("Subroutine %qs at %L is INTRINSIC but is not compatible "
3538 "with an intrinsic", sym
->name
, &c
->loc
);
3546 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3548 c
->resolved_sym
= sym
;
3549 if (!pure_subroutine (sym
, sym
->name
, &c
->loc
))
3557 resolve_specific_s (gfc_code
*c
)
3562 sym
= c
->symtree
->n
.sym
;
3566 m
= resolve_specific_s0 (c
, sym
);
3569 if (m
== MATCH_ERROR
)
3572 if (sym
->ns
->parent
== NULL
)
3575 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3581 sym
= c
->symtree
->n
.sym
;
3582 gfc_error ("Unable to resolve the specific subroutine %qs at %L",
3583 sym
->name
, &c
->loc
);
3589 /* Resolve a subroutine call not known to be generic nor specific. */
3592 resolve_unknown_s (gfc_code
*c
)
3596 sym
= c
->symtree
->n
.sym
;
3598 if (sym
->attr
.dummy
)
3600 sym
->attr
.proc
= PROC_DUMMY
;
3604 /* See if we have an intrinsic function reference. */
3606 if (gfc_is_intrinsic (sym
, 1, c
->loc
))
3608 if (gfc_intrinsic_sub_interface (c
, 1) == MATCH_YES
)
3613 /* The reference is to an external name. */
3616 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3618 c
->resolved_sym
= sym
;
3620 return pure_subroutine (sym
, sym
->name
, &c
->loc
);
3624 /* Resolve a subroutine call. Although it was tempting to use the same code
3625 for functions, subroutines and functions are stored differently and this
3626 makes things awkward. */
3629 resolve_call (gfc_code
*c
)
3632 procedure_type ptype
= PROC_INTRINSIC
;
3633 gfc_symbol
*csym
, *sym
;
3634 bool no_formal_args
;
3636 csym
= c
->symtree
? c
->symtree
->n
.sym
: NULL
;
3638 if (csym
&& csym
->ts
.type
!= BT_UNKNOWN
)
3640 gfc_error ("%qs at %L has a type, which is not consistent with "
3641 "the CALL at %L", csym
->name
, &csym
->declared_at
, &c
->loc
);
3645 if (csym
&& gfc_current_ns
->parent
&& csym
->ns
!= gfc_current_ns
)
3648 gfc_find_sym_tree (c
->symtree
->name
, gfc_current_ns
, 1, &st
);
3649 sym
= st
? st
->n
.sym
: NULL
;
3650 if (sym
&& csym
!= sym
3651 && sym
->ns
== gfc_current_ns
3652 && sym
->attr
.flavor
== FL_PROCEDURE
3653 && sym
->attr
.contained
)
3656 if (csym
->attr
.generic
)
3657 c
->symtree
->n
.sym
= sym
;
3660 csym
= c
->symtree
->n
.sym
;
3664 /* If this ia a deferred TBP, c->expr1 will be set. */
3665 if (!c
->expr1
&& csym
)
3667 if (csym
->attr
.abstract
)
3669 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3670 csym
->name
, &c
->loc
);
3674 /* Subroutines without the RECURSIVE attribution are not allowed to
3676 if (is_illegal_recursion (csym
, gfc_current_ns
))
3678 if (csym
->attr
.entry
&& csym
->ns
->entries
)
3679 gfc_error ("ENTRY %qs at %L cannot be called recursively, "
3680 "as subroutine %qs is not RECURSIVE",
3681 csym
->name
, &c
->loc
, csym
->ns
->entries
->sym
->name
);
3683 gfc_error ("SUBROUTINE %qs at %L cannot be called recursively, "
3684 "as it is not RECURSIVE", csym
->name
, &c
->loc
);
3690 /* Switch off assumed size checking and do this again for certain kinds
3691 of procedure, once the procedure itself is resolved. */
3692 need_full_assumed_size
++;
3695 ptype
= csym
->attr
.proc
;
3697 no_formal_args
= csym
&& is_external_proc (csym
)
3698 && gfc_sym_get_dummy_args (csym
) == NULL
;
3699 if (!resolve_actual_arglist (c
->ext
.actual
, ptype
, no_formal_args
))
3702 /* Resume assumed_size checking. */
3703 need_full_assumed_size
--;
3705 /* If external, check for usage. */
3706 if (csym
&& is_external_proc (csym
))
3707 resolve_global_procedure (csym
, &c
->loc
, 1);
3710 if (c
->resolved_sym
== NULL
)
3712 c
->resolved_isym
= NULL
;
3713 switch (procedure_kind (csym
))
3716 t
= resolve_generic_s (c
);
3719 case PTYPE_SPECIFIC
:
3720 t
= resolve_specific_s (c
);
3724 t
= resolve_unknown_s (c
);
3728 gfc_internal_error ("resolve_subroutine(): bad function type");
3732 /* Some checks of elemental subroutine actual arguments. */
3733 if (!resolve_elemental_actual (NULL
, c
))
3737 update_current_proc_array_outer_dependency (csym
);
3739 /* Typebound procedure: Assume the worst. */
3740 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3746 /* Compare the shapes of two arrays that have non-NULL shapes. If both
3747 op1->shape and op2->shape are non-NULL return true if their shapes
3748 match. If both op1->shape and op2->shape are non-NULL return false
3749 if their shapes do not match. If either op1->shape or op2->shape is
3750 NULL, return true. */
3753 compare_shapes (gfc_expr
*op1
, gfc_expr
*op2
)
3760 if (op1
->shape
!= NULL
&& op2
->shape
!= NULL
)
3762 for (i
= 0; i
< op1
->rank
; i
++)
3764 if (mpz_cmp (op1
->shape
[i
], op2
->shape
[i
]) != 0)
3766 gfc_error ("Shapes for operands at %L and %L are not conformable",
3767 &op1
->where
, &op2
->where
);
3777 /* Convert a logical operator to the corresponding bitwise intrinsic call.
3778 For example A .AND. B becomes IAND(A, B). */
3780 logical_to_bitwise (gfc_expr
*e
)
3782 gfc_expr
*tmp
, *op1
, *op2
;
3784 gfc_actual_arglist
*args
= NULL
;
3786 gcc_assert (e
->expr_type
== EXPR_OP
);
3788 isym
= GFC_ISYM_NONE
;
3789 op1
= e
->value
.op
.op1
;
3790 op2
= e
->value
.op
.op2
;
3792 switch (e
->value
.op
.op
)
3795 isym
= GFC_ISYM_NOT
;
3798 isym
= GFC_ISYM_IAND
;
3801 isym
= GFC_ISYM_IOR
;
3803 case INTRINSIC_NEQV
:
3804 isym
= GFC_ISYM_IEOR
;
3807 /* "Bitwise eqv" is just the complement of NEQV === IEOR.
3808 Change the old expression to NEQV, which will get replaced by IEOR,
3809 and wrap it in NOT. */
3810 tmp
= gfc_copy_expr (e
);
3811 tmp
->value
.op
.op
= INTRINSIC_NEQV
;
3812 tmp
= logical_to_bitwise (tmp
);
3813 isym
= GFC_ISYM_NOT
;
3818 gfc_internal_error ("logical_to_bitwise(): Bad intrinsic");
3821 /* Inherit the original operation's operands as arguments. */
3822 args
= gfc_get_actual_arglist ();
3826 args
->next
= gfc_get_actual_arglist ();
3827 args
->next
->expr
= op2
;
3830 /* Convert the expression to a function call. */
3831 e
->expr_type
= EXPR_FUNCTION
;
3832 e
->value
.function
.actual
= args
;
3833 e
->value
.function
.isym
= gfc_intrinsic_function_by_id (isym
);
3834 e
->value
.function
.name
= e
->value
.function
.isym
->name
;
3835 e
->value
.function
.esym
= NULL
;
3837 /* Make up a pre-resolved function call symtree if we need to. */
3838 if (!e
->symtree
|| !e
->symtree
->n
.sym
)
3841 gfc_get_ha_sym_tree (e
->value
.function
.isym
->name
, &e
->symtree
);
3842 sym
= e
->symtree
->n
.sym
;
3844 sym
->attr
.flavor
= FL_PROCEDURE
;
3845 sym
->attr
.function
= 1;
3846 sym
->attr
.elemental
= 1;
3848 sym
->attr
.referenced
= 1;
3849 gfc_intrinsic_symbol (sym
);
3850 gfc_commit_symbol (sym
);
3853 args
->name
= e
->value
.function
.isym
->formal
->name
;
3854 if (e
->value
.function
.isym
->formal
->next
)
3855 args
->next
->name
= e
->value
.function
.isym
->formal
->next
->name
;
3860 /* Recursively append candidate UOP to CANDIDATES. Store the number of
3861 candidates in CANDIDATES_LEN. */
3863 lookup_uop_fuzzy_find_candidates (gfc_symtree
*uop
,
3865 size_t &candidates_len
)
3872 /* Not sure how to properly filter here. Use all for a start.
3873 n.uop.op is NULL for empty interface operators (is that legal?) disregard
3874 these as i suppose they don't make terribly sense. */
3876 if (uop
->n
.uop
->op
!= NULL
)
3877 vec_push (candidates
, candidates_len
, uop
->name
);
3881 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3885 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3888 /* Lookup user-operator OP fuzzily, taking names in UOP into account. */
3891 lookup_uop_fuzzy (const char *op
, gfc_symtree
*uop
)
3893 char **candidates
= NULL
;
3894 size_t candidates_len
= 0;
3895 lookup_uop_fuzzy_find_candidates (uop
, candidates
, candidates_len
);
3896 return gfc_closest_fuzzy_match (op
, candidates
);
3900 /* Callback finding an impure function as an operand to an .and. or
3901 .or. expression. Remember the last function warned about to
3902 avoid double warnings when recursing. */
3905 impure_function_callback (gfc_expr
**e
, int *walk_subtrees ATTRIBUTE_UNUSED
,
3910 static gfc_expr
*last
= NULL
;
3911 bool *found
= (bool *) data
;
3913 if (f
->expr_type
== EXPR_FUNCTION
)
3916 if (f
!= last
&& !gfc_pure_function (f
, &name
)
3917 && !gfc_implicit_pure_function (f
))
3920 gfc_warning (OPT_Wfunction_elimination
,
3921 "Impure function %qs at %L might not be evaluated",
3924 gfc_warning (OPT_Wfunction_elimination
,
3925 "Impure function at %L might not be evaluated",
3934 /* Return true if TYPE is character based, false otherwise. */
3937 is_character_based (bt type
)
3939 return type
== BT_CHARACTER
|| type
== BT_HOLLERITH
;
3943 /* If expression is a hollerith, convert it to character and issue a warning
3944 for the conversion. */
3947 convert_hollerith_to_character (gfc_expr
*e
)
3949 if (e
->ts
.type
== BT_HOLLERITH
)
3953 t
.type
= BT_CHARACTER
;
3954 t
.kind
= e
->ts
.kind
;
3955 gfc_convert_type_warn (e
, &t
, 2, 1);
3959 /* Convert to numeric and issue a warning for the conversion. */
3962 convert_to_numeric (gfc_expr
*a
, gfc_expr
*b
)
3966 t
.type
= b
->ts
.type
;
3967 t
.kind
= b
->ts
.kind
;
3968 gfc_convert_type_warn (a
, &t
, 2, 1);
3971 /* Resolve an operator expression node. This can involve replacing the
3972 operation with a user defined function call. */
3975 resolve_operator (gfc_expr
*e
)
3977 gfc_expr
*op1
, *op2
;
3979 bool dual_locus_error
;
3982 /* Resolve all subnodes-- give them types. */
3984 switch (e
->value
.op
.op
)
3987 if (!gfc_resolve_expr (e
->value
.op
.op2
))
3993 case INTRINSIC_UPLUS
:
3994 case INTRINSIC_UMINUS
:
3995 case INTRINSIC_PARENTHESES
:
3996 if (!gfc_resolve_expr (e
->value
.op
.op1
))
3999 && e
->value
.op
.op1
->ts
.type
== BT_BOZ
&& !e
->value
.op
.op2
)
4001 gfc_error ("BOZ literal constant at %L cannot be an operand of "
4002 "unary operator %qs", &e
->value
.op
.op1
->where
,
4003 gfc_op2string (e
->value
.op
.op
));
4009 /* Typecheck the new node. */
4011 op1
= e
->value
.op
.op1
;
4012 op2
= e
->value
.op
.op2
;
4013 if (op1
== NULL
&& op2
== NULL
)
4016 dual_locus_error
= false;
4018 /* op1 and op2 cannot both be BOZ. */
4019 if (op1
&& op1
->ts
.type
== BT_BOZ
4020 && op2
&& op2
->ts
.type
== BT_BOZ
)
4022 gfc_error ("Operands at %L and %L cannot appear as operands of "
4023 "binary operator %qs", &op1
->where
, &op2
->where
,
4024 gfc_op2string (e
->value
.op
.op
));
4028 if ((op1
&& op1
->expr_type
== EXPR_NULL
)
4029 || (op2
&& op2
->expr_type
== EXPR_NULL
))
4031 sprintf (msg
, _("Invalid context for NULL() pointer at %%L"));
4035 switch (e
->value
.op
.op
)
4037 case INTRINSIC_UPLUS
:
4038 case INTRINSIC_UMINUS
:
4039 if (op1
->ts
.type
== BT_INTEGER
4040 || op1
->ts
.type
== BT_REAL
4041 || op1
->ts
.type
== BT_COMPLEX
)
4047 sprintf (msg
, _("Operand of unary numeric operator %%<%s%%> at %%L is %s"),
4048 gfc_op2string (e
->value
.op
.op
), gfc_typename (e
));
4051 case INTRINSIC_PLUS
:
4052 case INTRINSIC_MINUS
:
4053 case INTRINSIC_TIMES
:
4054 case INTRINSIC_DIVIDE
:
4055 case INTRINSIC_POWER
:
4056 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
4058 gfc_type_convert_binary (e
, 1);
4062 if (op1
->ts
.type
== BT_DERIVED
|| op2
->ts
.type
== BT_DERIVED
)
4064 _("Unexpected derived-type entities in binary intrinsic "
4065 "numeric operator %%<%s%%> at %%L"),
4066 gfc_op2string (e
->value
.op
.op
));
4069 _("Operands of binary numeric operator %%<%s%%> at %%L are %s/%s"),
4070 gfc_op2string (e
->value
.op
.op
), gfc_typename (op1
),
4071 gfc_typename (op2
));
4074 case INTRINSIC_CONCAT
:
4075 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
4076 && op1
->ts
.kind
== op2
->ts
.kind
)
4078 e
->ts
.type
= BT_CHARACTER
;
4079 e
->ts
.kind
= op1
->ts
.kind
;
4084 _("Operands of string concatenation operator at %%L are %s/%s"),
4085 gfc_typename (op1
), gfc_typename (op2
));
4091 case INTRINSIC_NEQV
:
4092 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
4094 e
->ts
.type
= BT_LOGICAL
;
4095 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
4096 if (op1
->ts
.kind
< e
->ts
.kind
)
4097 gfc_convert_type (op1
, &e
->ts
, 2);
4098 else if (op2
->ts
.kind
< e
->ts
.kind
)
4099 gfc_convert_type (op2
, &e
->ts
, 2);
4101 if (flag_frontend_optimize
&&
4102 (e
->value
.op
.op
== INTRINSIC_AND
|| e
->value
.op
.op
== INTRINSIC_OR
))
4104 /* Warn about short-circuiting
4105 with impure function as second operand. */
4107 gfc_expr_walker (&op2
, impure_function_callback
, &op2_f
);
4112 /* Logical ops on integers become bitwise ops with -fdec. */
4114 && (op1
->ts
.type
== BT_INTEGER
|| op2
->ts
.type
== BT_INTEGER
))
4116 e
->ts
.type
= BT_INTEGER
;
4117 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
4118 if (op1
->ts
.type
!= e
->ts
.type
|| op1
->ts
.kind
!= e
->ts
.kind
)
4119 gfc_convert_type (op1
, &e
->ts
, 1);
4120 if (op2
->ts
.type
!= e
->ts
.type
|| op2
->ts
.kind
!= e
->ts
.kind
)
4121 gfc_convert_type (op2
, &e
->ts
, 1);
4122 e
= logical_to_bitwise (e
);
4126 sprintf (msg
, _("Operands of logical operator %%<%s%%> at %%L are %s/%s"),
4127 gfc_op2string (e
->value
.op
.op
), gfc_typename (op1
),
4128 gfc_typename (op2
));
4133 /* Logical ops on integers become bitwise ops with -fdec. */
4134 if (flag_dec
&& op1
->ts
.type
== BT_INTEGER
)
4136 e
->ts
.type
= BT_INTEGER
;
4137 e
->ts
.kind
= op1
->ts
.kind
;
4138 e
= logical_to_bitwise (e
);
4142 if (op1
->ts
.type
== BT_LOGICAL
)
4144 e
->ts
.type
= BT_LOGICAL
;
4145 e
->ts
.kind
= op1
->ts
.kind
;
4149 sprintf (msg
, _("Operand of .not. operator at %%L is %s"),
4150 gfc_typename (op1
));
4154 case INTRINSIC_GT_OS
:
4156 case INTRINSIC_GE_OS
:
4158 case INTRINSIC_LT_OS
:
4160 case INTRINSIC_LE_OS
:
4161 if (op1
->ts
.type
== BT_COMPLEX
|| op2
->ts
.type
== BT_COMPLEX
)
4163 strcpy (msg
, _("COMPLEX quantities cannot be compared at %L"));
4170 case INTRINSIC_EQ_OS
:
4172 case INTRINSIC_NE_OS
:
4175 && is_character_based (op1
->ts
.type
)
4176 && is_character_based (op2
->ts
.type
))
4178 convert_hollerith_to_character (op1
);
4179 convert_hollerith_to_character (op2
);
4182 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
4183 && op1
->ts
.kind
== op2
->ts
.kind
)
4185 e
->ts
.type
= BT_LOGICAL
;
4186 e
->ts
.kind
= gfc_default_logical_kind
;
4190 /* If op1 is BOZ, then op2 is not!. Try to convert to type of op2. */
4191 if (op1
->ts
.type
== BT_BOZ
)
4193 if (gfc_invalid_boz ("BOZ literal constant near %L cannot appear as "
4194 "an operand of a relational operator",
4198 if (op2
->ts
.type
== BT_INTEGER
&& !gfc_boz2int (op1
, op2
->ts
.kind
))
4201 if (op2
->ts
.type
== BT_REAL
&& !gfc_boz2real (op1
, op2
->ts
.kind
))
4205 /* If op2 is BOZ, then op1 is not!. Try to convert to type of op2. */
4206 if (op2
->ts
.type
== BT_BOZ
)
4208 if (gfc_invalid_boz ("BOZ literal constant near %L cannot appear as "
4209 "an operand of a relational operator",
4213 if (op1
->ts
.type
== BT_INTEGER
&& !gfc_boz2int (op2
, op1
->ts
.kind
))
4216 if (op1
->ts
.type
== BT_REAL
&& !gfc_boz2real (op2
, op1
->ts
.kind
))
4220 && op1
->ts
.type
== BT_HOLLERITH
&& gfc_numeric_ts (&op2
->ts
))
4221 convert_to_numeric (op1
, op2
);
4224 && gfc_numeric_ts (&op1
->ts
) && op2
->ts
.type
== BT_HOLLERITH
)
4225 convert_to_numeric (op2
, op1
);
4227 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
4229 gfc_type_convert_binary (e
, 1);
4231 e
->ts
.type
= BT_LOGICAL
;
4232 e
->ts
.kind
= gfc_default_logical_kind
;
4234 if (warn_compare_reals
)
4236 gfc_intrinsic_op op
= e
->value
.op
.op
;
4238 /* Type conversion has made sure that the types of op1 and op2
4239 agree, so it is only necessary to check the first one. */
4240 if ((op1
->ts
.type
== BT_REAL
|| op1
->ts
.type
== BT_COMPLEX
)
4241 && (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
4242 || op
== INTRINSIC_NE
|| op
== INTRINSIC_NE_OS
))
4246 if (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
)
4247 msg
= "Equality comparison for %s at %L";
4249 msg
= "Inequality comparison for %s at %L";
4251 gfc_warning (OPT_Wcompare_reals
, msg
,
4252 gfc_typename (op1
), &op1
->where
);
4259 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
4261 _("Logicals at %%L must be compared with %s instead of %s"),
4262 (e
->value
.op
.op
== INTRINSIC_EQ
4263 || e
->value
.op
.op
== INTRINSIC_EQ_OS
)
4264 ? ".eqv." : ".neqv.", gfc_op2string (e
->value
.op
.op
));
4267 _("Operands of comparison operator %%<%s%%> at %%L are %s/%s"),
4268 gfc_op2string (e
->value
.op
.op
), gfc_typename (op1
),
4269 gfc_typename (op2
));
4273 case INTRINSIC_USER
:
4274 if (e
->value
.op
.uop
->op
== NULL
)
4276 const char *name
= e
->value
.op
.uop
->name
;
4277 const char *guessed
;
4278 guessed
= lookup_uop_fuzzy (name
, e
->value
.op
.uop
->ns
->uop_root
);
4280 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L; did you mean '%s'?"),
4283 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L"), name
);
4285 else if (op2
== NULL
)
4286 sprintf (msg
, _("Operand of user operator %%<%s%%> at %%L is %s"),
4287 e
->value
.op
.uop
->name
, gfc_typename (op1
));
4290 sprintf (msg
, _("Operands of user operator %%<%s%%> at %%L are %s/%s"),
4291 e
->value
.op
.uop
->name
, gfc_typename (op1
),
4292 gfc_typename (op2
));
4293 e
->value
.op
.uop
->op
->sym
->attr
.referenced
= 1;
4298 case INTRINSIC_PARENTHESES
:
4300 if (e
->ts
.type
== BT_CHARACTER
)
4301 e
->ts
.u
.cl
= op1
->ts
.u
.cl
;
4305 gfc_internal_error ("resolve_operator(): Bad intrinsic");
4308 /* Deal with arrayness of an operand through an operator. */
4310 switch (e
->value
.op
.op
)
4312 case INTRINSIC_PLUS
:
4313 case INTRINSIC_MINUS
:
4314 case INTRINSIC_TIMES
:
4315 case INTRINSIC_DIVIDE
:
4316 case INTRINSIC_POWER
:
4317 case INTRINSIC_CONCAT
:
4321 case INTRINSIC_NEQV
:
4323 case INTRINSIC_EQ_OS
:
4325 case INTRINSIC_NE_OS
:
4327 case INTRINSIC_GT_OS
:
4329 case INTRINSIC_GE_OS
:
4331 case INTRINSIC_LT_OS
:
4333 case INTRINSIC_LE_OS
:
4335 if (op1
->rank
== 0 && op2
->rank
== 0)
4338 if (op1
->rank
== 0 && op2
->rank
!= 0)
4340 e
->rank
= op2
->rank
;
4342 if (e
->shape
== NULL
)
4343 e
->shape
= gfc_copy_shape (op2
->shape
, op2
->rank
);
4346 if (op1
->rank
!= 0 && op2
->rank
== 0)
4348 e
->rank
= op1
->rank
;
4350 if (e
->shape
== NULL
)
4351 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4354 if (op1
->rank
!= 0 && op2
->rank
!= 0)
4356 if (op1
->rank
== op2
->rank
)
4358 e
->rank
= op1
->rank
;
4359 if (e
->shape
== NULL
)
4361 t
= compare_shapes (op1
, op2
);
4365 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4370 /* Allow higher level expressions to work. */
4373 /* Try user-defined operators, and otherwise throw an error. */
4374 dual_locus_error
= true;
4376 _("Inconsistent ranks for operator at %%L and %%L"));
4383 case INTRINSIC_PARENTHESES
:
4385 case INTRINSIC_UPLUS
:
4386 case INTRINSIC_UMINUS
:
4387 /* Simply copy arrayness attribute */
4388 e
->rank
= op1
->rank
;
4390 if (e
->shape
== NULL
)
4391 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4401 /* Attempt to simplify the expression. */
4404 t
= gfc_simplify_expr (e
, 0);
4405 /* Some calls do not succeed in simplification and return false
4406 even though there is no error; e.g. variable references to
4407 PARAMETER arrays. */
4408 if (!gfc_is_constant_expr (e
))
4416 match m
= gfc_extend_expr (e
);
4419 if (m
== MATCH_ERROR
)
4423 if (dual_locus_error
)
4424 gfc_error (msg
, &op1
->where
, &op2
->where
);
4426 gfc_error (msg
, &e
->where
);
4432 /************** Array resolution subroutines **************/
4435 { CMP_LT
, CMP_EQ
, CMP_GT
, CMP_UNKNOWN
};
4437 /* Compare two integer expressions. */
4439 static compare_result
4440 compare_bound (gfc_expr
*a
, gfc_expr
*b
)
4444 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
4445 || b
== NULL
|| b
->expr_type
!= EXPR_CONSTANT
)
4448 /* If either of the types isn't INTEGER, we must have
4449 raised an error earlier. */
4451 if (a
->ts
.type
!= BT_INTEGER
|| b
->ts
.type
!= BT_INTEGER
)
4454 i
= mpz_cmp (a
->value
.integer
, b
->value
.integer
);
4464 /* Compare an integer expression with an integer. */
4466 static compare_result
4467 compare_bound_int (gfc_expr
*a
, int b
)
4471 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4474 if (a
->ts
.type
!= BT_INTEGER
)
4475 gfc_internal_error ("compare_bound_int(): Bad expression");
4477 i
= mpz_cmp_si (a
->value
.integer
, b
);
4487 /* Compare an integer expression with a mpz_t. */
4489 static compare_result
4490 compare_bound_mpz_t (gfc_expr
*a
, mpz_t b
)
4494 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4497 if (a
->ts
.type
!= BT_INTEGER
)
4498 gfc_internal_error ("compare_bound_int(): Bad expression");
4500 i
= mpz_cmp (a
->value
.integer
, b
);
4510 /* Compute the last value of a sequence given by a triplet.
4511 Return 0 if it wasn't able to compute the last value, or if the
4512 sequence if empty, and 1 otherwise. */
4515 compute_last_value_for_triplet (gfc_expr
*start
, gfc_expr
*end
,
4516 gfc_expr
*stride
, mpz_t last
)
4520 if (start
== NULL
|| start
->expr_type
!= EXPR_CONSTANT
4521 || end
== NULL
|| end
->expr_type
!= EXPR_CONSTANT
4522 || (stride
!= NULL
&& stride
->expr_type
!= EXPR_CONSTANT
))
4525 if (start
->ts
.type
!= BT_INTEGER
|| end
->ts
.type
!= BT_INTEGER
4526 || (stride
!= NULL
&& stride
->ts
.type
!= BT_INTEGER
))
4529 if (stride
== NULL
|| compare_bound_int (stride
, 1) == CMP_EQ
)
4531 if (compare_bound (start
, end
) == CMP_GT
)
4533 mpz_set (last
, end
->value
.integer
);
4537 if (compare_bound_int (stride
, 0) == CMP_GT
)
4539 /* Stride is positive */
4540 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) > 0)
4545 /* Stride is negative */
4546 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) < 0)
4551 mpz_sub (rem
, end
->value
.integer
, start
->value
.integer
);
4552 mpz_tdiv_r (rem
, rem
, stride
->value
.integer
);
4553 mpz_sub (last
, end
->value
.integer
, rem
);
4560 /* Compare a single dimension of an array reference to the array
4564 check_dimension (int i
, gfc_array_ref
*ar
, gfc_array_spec
*as
)
4568 if (ar
->dimen_type
[i
] == DIMEN_STAR
)
4570 gcc_assert (ar
->stride
[i
] == NULL
);
4571 /* This implies [*] as [*:] and [*:3] are not possible. */
4572 if (ar
->start
[i
] == NULL
)
4574 gcc_assert (ar
->end
[i
] == NULL
);
4579 /* Given start, end and stride values, calculate the minimum and
4580 maximum referenced indexes. */
4582 switch (ar
->dimen_type
[i
])
4585 case DIMEN_THIS_IMAGE
:
4590 if (compare_bound (ar
->start
[i
], as
->lower
[i
]) == CMP_LT
)
4593 gfc_warning (0, "Array reference at %L is out of bounds "
4594 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4595 mpz_get_si (ar
->start
[i
]->value
.integer
),
4596 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4598 gfc_warning (0, "Array reference at %L is out of bounds "
4599 "(%ld < %ld) in codimension %d", &ar
->c_where
[i
],
4600 mpz_get_si (ar
->start
[i
]->value
.integer
),
4601 mpz_get_si (as
->lower
[i
]->value
.integer
),
4605 if (compare_bound (ar
->start
[i
], as
->upper
[i
]) == CMP_GT
)
4608 gfc_warning (0, "Array reference at %L is out of bounds "
4609 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4610 mpz_get_si (ar
->start
[i
]->value
.integer
),
4611 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4613 gfc_warning (0, "Array reference at %L is out of bounds "
4614 "(%ld > %ld) in codimension %d", &ar
->c_where
[i
],
4615 mpz_get_si (ar
->start
[i
]->value
.integer
),
4616 mpz_get_si (as
->upper
[i
]->value
.integer
),
4625 #define AR_START (ar->start[i] ? ar->start[i] : as->lower[i])
4626 #define AR_END (ar->end[i] ? ar->end[i] : as->upper[i])
4628 compare_result comp_start_end
= compare_bound (AR_START
, AR_END
);
4630 /* Check for zero stride, which is not allowed. */
4631 if (compare_bound_int (ar
->stride
[i
], 0) == CMP_EQ
)
4633 gfc_error ("Illegal stride of zero at %L", &ar
->c_where
[i
]);
4637 /* if start == len || (stride > 0 && start < len)
4638 || (stride < 0 && start > len),
4639 then the array section contains at least one element. In this
4640 case, there is an out-of-bounds access if
4641 (start < lower || start > upper). */
4642 if (compare_bound (AR_START
, AR_END
) == CMP_EQ
4643 || ((compare_bound_int (ar
->stride
[i
], 0) == CMP_GT
4644 || ar
->stride
[i
] == NULL
) && comp_start_end
== CMP_LT
)
4645 || (compare_bound_int (ar
->stride
[i
], 0) == CMP_LT
4646 && comp_start_end
== CMP_GT
))
4648 if (compare_bound (AR_START
, as
->lower
[i
]) == CMP_LT
)
4650 gfc_warning (0, "Lower array reference at %L is out of bounds "
4651 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4652 mpz_get_si (AR_START
->value
.integer
),
4653 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4656 if (compare_bound (AR_START
, as
->upper
[i
]) == CMP_GT
)
4658 gfc_warning (0, "Lower array reference at %L is out of bounds "
4659 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4660 mpz_get_si (AR_START
->value
.integer
),
4661 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4666 /* If we can compute the highest index of the array section,
4667 then it also has to be between lower and upper. */
4668 mpz_init (last_value
);
4669 if (compute_last_value_for_triplet (AR_START
, AR_END
, ar
->stride
[i
],
4672 if (compare_bound_mpz_t (as
->lower
[i
], last_value
) == CMP_GT
)
4674 gfc_warning (0, "Upper array reference at %L is out of bounds "
4675 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4676 mpz_get_si (last_value
),
4677 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4678 mpz_clear (last_value
);
4681 if (compare_bound_mpz_t (as
->upper
[i
], last_value
) == CMP_LT
)
4683 gfc_warning (0, "Upper array reference at %L is out of bounds "
4684 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4685 mpz_get_si (last_value
),
4686 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4687 mpz_clear (last_value
);
4691 mpz_clear (last_value
);
4699 gfc_internal_error ("check_dimension(): Bad array reference");
4706 /* Compare an array reference with an array specification. */
4709 compare_spec_to_ref (gfc_array_ref
*ar
)
4716 /* TODO: Full array sections are only allowed as actual parameters. */
4717 if (as
->type
== AS_ASSUMED_SIZE
4718 && (/*ar->type == AR_FULL
4719 ||*/ (ar
->type
== AR_SECTION
4720 && ar
->dimen_type
[i
] == DIMEN_RANGE
&& ar
->end
[i
] == NULL
)))
4722 gfc_error ("Rightmost upper bound of assumed size array section "
4723 "not specified at %L", &ar
->where
);
4727 if (ar
->type
== AR_FULL
)
4730 if (as
->rank
!= ar
->dimen
)
4732 gfc_error ("Rank mismatch in array reference at %L (%d/%d)",
4733 &ar
->where
, ar
->dimen
, as
->rank
);
4737 /* ar->codimen == 0 is a local array. */
4738 if (as
->corank
!= ar
->codimen
&& ar
->codimen
!= 0)
4740 gfc_error ("Coindex rank mismatch in array reference at %L (%d/%d)",
4741 &ar
->where
, ar
->codimen
, as
->corank
);
4745 for (i
= 0; i
< as
->rank
; i
++)
4746 if (!check_dimension (i
, ar
, as
))
4749 /* Local access has no coarray spec. */
4750 if (ar
->codimen
!= 0)
4751 for (i
= as
->rank
; i
< as
->rank
+ as
->corank
; i
++)
4753 if (ar
->dimen_type
[i
] != DIMEN_ELEMENT
&& !ar
->in_allocate
4754 && ar
->dimen_type
[i
] != DIMEN_THIS_IMAGE
)
4756 gfc_error ("Coindex of codimension %d must be a scalar at %L",
4757 i
+ 1 - as
->rank
, &ar
->where
);
4760 if (!check_dimension (i
, ar
, as
))
4768 /* Resolve one part of an array index. */
4771 gfc_resolve_index_1 (gfc_expr
*index
, int check_scalar
,
4772 int force_index_integer_kind
)
4779 if (!gfc_resolve_expr (index
))
4782 if (check_scalar
&& index
->rank
!= 0)
4784 gfc_error ("Array index at %L must be scalar", &index
->where
);
4788 if (index
->ts
.type
!= BT_INTEGER
&& index
->ts
.type
!= BT_REAL
)
4790 gfc_error ("Array index at %L must be of INTEGER type, found %s",
4791 &index
->where
, gfc_basic_typename (index
->ts
.type
));
4795 if (index
->ts
.type
== BT_REAL
)
4796 if (!gfc_notify_std (GFC_STD_LEGACY
, "REAL array index at %L",
4800 if ((index
->ts
.kind
!= gfc_index_integer_kind
4801 && force_index_integer_kind
)
4802 || index
->ts
.type
!= BT_INTEGER
)
4805 ts
.type
= BT_INTEGER
;
4806 ts
.kind
= gfc_index_integer_kind
;
4808 gfc_convert_type_warn (index
, &ts
, 2, 0);
4814 /* Resolve one part of an array index. */
4817 gfc_resolve_index (gfc_expr
*index
, int check_scalar
)
4819 return gfc_resolve_index_1 (index
, check_scalar
, 1);
4822 /* Resolve a dim argument to an intrinsic function. */
4825 gfc_resolve_dim_arg (gfc_expr
*dim
)
4830 if (!gfc_resolve_expr (dim
))
4835 gfc_error ("Argument dim at %L must be scalar", &dim
->where
);
4840 if (dim
->ts
.type
!= BT_INTEGER
)
4842 gfc_error ("Argument dim at %L must be of INTEGER type", &dim
->where
);
4846 if (dim
->ts
.kind
!= gfc_index_integer_kind
)
4851 ts
.type
= BT_INTEGER
;
4852 ts
.kind
= gfc_index_integer_kind
;
4854 gfc_convert_type_warn (dim
, &ts
, 2, 0);
4860 /* Given an expression that contains array references, update those array
4861 references to point to the right array specifications. While this is
4862 filled in during matching, this information is difficult to save and load
4863 in a module, so we take care of it here.
4865 The idea here is that the original array reference comes from the
4866 base symbol. We traverse the list of reference structures, setting
4867 the stored reference to references. Component references can
4868 provide an additional array specification. */
4871 find_array_spec (gfc_expr
*e
)
4876 bool class_as
= false;
4878 if (e
->symtree
->n
.sym
->ts
.type
== BT_CLASS
)
4880 as
= CLASS_DATA (e
->symtree
->n
.sym
)->as
;
4884 as
= e
->symtree
->n
.sym
->as
;
4886 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4891 gfc_internal_error ("find_array_spec(): Missing spec");
4898 c
= ref
->u
.c
.component
;
4899 if (c
->attr
.dimension
)
4901 if (as
!= NULL
&& !(class_as
&& as
== c
->as
))
4902 gfc_internal_error ("find_array_spec(): unused as(1)");
4914 gfc_internal_error ("find_array_spec(): unused as(2)");
4918 /* Resolve an array reference. */
4921 resolve_array_ref (gfc_array_ref
*ar
)
4923 int i
, check_scalar
;
4926 for (i
= 0; i
< ar
->dimen
+ ar
->codimen
; i
++)
4928 check_scalar
= ar
->dimen_type
[i
] == DIMEN_RANGE
;
4930 /* Do not force gfc_index_integer_kind for the start. We can
4931 do fine with any integer kind. This avoids temporary arrays
4932 created for indexing with a vector. */
4933 if (!gfc_resolve_index_1 (ar
->start
[i
], check_scalar
, 0))
4935 if (!gfc_resolve_index (ar
->end
[i
], check_scalar
))
4937 if (!gfc_resolve_index (ar
->stride
[i
], check_scalar
))
4942 if (ar
->dimen_type
[i
] == DIMEN_UNKNOWN
)
4946 ar
->dimen_type
[i
] = DIMEN_ELEMENT
;
4950 ar
->dimen_type
[i
] = DIMEN_VECTOR
;
4951 if (e
->expr_type
== EXPR_VARIABLE
4952 && e
->symtree
->n
.sym
->ts
.type
== BT_DERIVED
)
4953 ar
->start
[i
] = gfc_get_parentheses (e
);
4957 gfc_error ("Array index at %L is an array of rank %d",
4958 &ar
->c_where
[i
], e
->rank
);
4962 /* Fill in the upper bound, which may be lower than the
4963 specified one for something like a(2:10:5), which is
4964 identical to a(2:7:5). Only relevant for strides not equal
4965 to one. Don't try a division by zero. */
4966 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4967 && ar
->stride
[i
] != NULL
&& ar
->stride
[i
]->expr_type
== EXPR_CONSTANT
4968 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 1L) != 0
4969 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 0L) != 0)
4973 if (gfc_ref_dimen_size (ar
, i
, &size
, &end
))
4975 if (ar
->end
[i
] == NULL
)
4978 gfc_get_constant_expr (BT_INTEGER
, gfc_index_integer_kind
,
4980 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4982 else if (ar
->end
[i
]->ts
.type
== BT_INTEGER
4983 && ar
->end
[i
]->expr_type
== EXPR_CONSTANT
)
4985 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4996 if (ar
->type
== AR_FULL
)
4998 if (ar
->as
->rank
== 0)
4999 ar
->type
= AR_ELEMENT
;
5001 /* Make sure array is the same as array(:,:), this way
5002 we don't need to special case all the time. */
5003 ar
->dimen
= ar
->as
->rank
;
5004 for (i
= 0; i
< ar
->dimen
; i
++)
5006 ar
->dimen_type
[i
] = DIMEN_RANGE
;
5008 gcc_assert (ar
->start
[i
] == NULL
);
5009 gcc_assert (ar
->end
[i
] == NULL
);
5010 gcc_assert (ar
->stride
[i
] == NULL
);
5014 /* If the reference type is unknown, figure out what kind it is. */
5016 if (ar
->type
== AR_UNKNOWN
)
5018 ar
->type
= AR_ELEMENT
;
5019 for (i
= 0; i
< ar
->dimen
; i
++)
5020 if (ar
->dimen_type
[i
] == DIMEN_RANGE
5021 || ar
->dimen_type
[i
] == DIMEN_VECTOR
)
5023 ar
->type
= AR_SECTION
;
5028 if (!ar
->as
->cray_pointee
&& !compare_spec_to_ref (ar
))
5031 if (ar
->as
->corank
&& ar
->codimen
== 0)
5034 ar
->codimen
= ar
->as
->corank
;
5035 for (n
= ar
->dimen
; n
< ar
->dimen
+ ar
->codimen
; n
++)
5036 ar
->dimen_type
[n
] = DIMEN_THIS_IMAGE
;
5044 resolve_substring (gfc_ref
*ref
, bool *equal_length
)
5046 int k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
5048 if (ref
->u
.ss
.start
!= NULL
)
5050 if (!gfc_resolve_expr (ref
->u
.ss
.start
))
5053 if (ref
->u
.ss
.start
->ts
.type
!= BT_INTEGER
)
5055 gfc_error ("Substring start index at %L must be of type INTEGER",
5056 &ref
->u
.ss
.start
->where
);
5060 if (ref
->u
.ss
.start
->rank
!= 0)
5062 gfc_error ("Substring start index at %L must be scalar",
5063 &ref
->u
.ss
.start
->where
);
5067 if (compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_LT
5068 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
5069 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
5071 gfc_error ("Substring start index at %L is less than one",
5072 &ref
->u
.ss
.start
->where
);
5077 if (ref
->u
.ss
.end
!= NULL
)
5079 if (!gfc_resolve_expr (ref
->u
.ss
.end
))
5082 if (ref
->u
.ss
.end
->ts
.type
!= BT_INTEGER
)
5084 gfc_error ("Substring end index at %L must be of type INTEGER",
5085 &ref
->u
.ss
.end
->where
);
5089 if (ref
->u
.ss
.end
->rank
!= 0)
5091 gfc_error ("Substring end index at %L must be scalar",
5092 &ref
->u
.ss
.end
->where
);
5096 if (ref
->u
.ss
.length
!= NULL
5097 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_GT
5098 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
5099 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
5101 gfc_error ("Substring end index at %L exceeds the string length",
5102 &ref
->u
.ss
.start
->where
);
5106 if (compare_bound_mpz_t (ref
->u
.ss
.end
,
5107 gfc_integer_kinds
[k
].huge
) == CMP_GT
5108 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
5109 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
5111 gfc_error ("Substring end index at %L is too large",
5112 &ref
->u
.ss
.end
->where
);
5115 /* If the substring has the same length as the original
5116 variable, the reference itself can be deleted. */
5118 if (ref
->u
.ss
.length
!= NULL
5119 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_EQ
5120 && compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_EQ
)
5121 *equal_length
= true;
5128 /* This function supplies missing substring charlens. */
5131 gfc_resolve_substring_charlen (gfc_expr
*e
)
5134 gfc_expr
*start
, *end
;
5135 gfc_typespec
*ts
= NULL
;
5138 for (char_ref
= e
->ref
; char_ref
; char_ref
= char_ref
->next
)
5140 if (char_ref
->type
== REF_SUBSTRING
|| char_ref
->type
== REF_INQUIRY
)
5142 if (char_ref
->type
== REF_COMPONENT
)
5143 ts
= &char_ref
->u
.c
.component
->ts
;
5146 if (!char_ref
|| char_ref
->type
== REF_INQUIRY
)
5149 gcc_assert (char_ref
->next
== NULL
);
5153 if (e
->ts
.u
.cl
->length
)
5154 gfc_free_expr (e
->ts
.u
.cl
->length
);
5155 else if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
->attr
.dummy
)
5160 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5162 if (char_ref
->u
.ss
.start
)
5163 start
= gfc_copy_expr (char_ref
->u
.ss
.start
);
5165 start
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 1);
5167 if (char_ref
->u
.ss
.end
)
5168 end
= gfc_copy_expr (char_ref
->u
.ss
.end
);
5169 else if (e
->expr_type
== EXPR_VARIABLE
)
5172 ts
= &e
->symtree
->n
.sym
->ts
;
5173 end
= gfc_copy_expr (ts
->u
.cl
->length
);
5180 gfc_free_expr (start
);
5181 gfc_free_expr (end
);
5185 /* Length = (end - start + 1).
5186 Check first whether it has a constant length. */
5187 if (gfc_dep_difference (end
, start
, &diff
))
5189 gfc_expr
*len
= gfc_get_constant_expr (BT_INTEGER
, gfc_charlen_int_kind
,
5192 mpz_add_ui (len
->value
.integer
, diff
, 1);
5194 e
->ts
.u
.cl
->length
= len
;
5195 /* The check for length < 0 is handled below */
5199 e
->ts
.u
.cl
->length
= gfc_subtract (end
, start
);
5200 e
->ts
.u
.cl
->length
= gfc_add (e
->ts
.u
.cl
->length
,
5201 gfc_get_int_expr (gfc_charlen_int_kind
,
5205 /* F2008, 6.4.1: Both the starting point and the ending point shall
5206 be within the range 1, 2, ..., n unless the starting point exceeds
5207 the ending point, in which case the substring has length zero. */
5209 if (mpz_cmp_si (e
->ts
.u
.cl
->length
->value
.integer
, 0) < 0)
5210 mpz_set_si (e
->ts
.u
.cl
->length
->value
.integer
, 0);
5212 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5213 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5215 /* Make sure that the length is simplified. */
5216 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 1);
5217 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5221 /* Resolve subtype references. */
5224 gfc_resolve_ref (gfc_expr
*expr
)
5226 int current_part_dimension
, n_components
, seen_part_dimension
, dim
;
5227 gfc_ref
*ref
, **prev
, *array_ref
;
5230 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5231 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.as
== NULL
)
5233 find_array_spec (expr
);
5237 for (prev
= &expr
->ref
; *prev
!= NULL
;
5238 prev
= *prev
== NULL
? prev
: &(*prev
)->next
)
5239 switch ((*prev
)->type
)
5242 if (!resolve_array_ref (&(*prev
)->u
.ar
))
5251 equal_length
= false;
5252 if (!resolve_substring (*prev
, &equal_length
))
5255 if (expr
->expr_type
!= EXPR_SUBSTRING
&& equal_length
)
5257 /* Remove the reference and move the charlen, if any. */
5261 expr
->ts
.u
.cl
= ref
->u
.ss
.length
;
5262 ref
->u
.ss
.length
= NULL
;
5263 gfc_free_ref_list (ref
);
5268 /* Check constraints on part references. */
5270 current_part_dimension
= 0;
5271 seen_part_dimension
= 0;
5275 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5281 switch (ref
->u
.ar
.type
)
5284 /* Coarray scalar. */
5285 if (ref
->u
.ar
.as
->rank
== 0)
5287 current_part_dimension
= 0;
5292 current_part_dimension
= 1;
5297 current_part_dimension
= 0;
5301 gfc_internal_error ("resolve_ref(): Bad array reference");
5307 if (current_part_dimension
|| seen_part_dimension
)
5310 if (ref
->u
.c
.component
->attr
.pointer
5311 || ref
->u
.c
.component
->attr
.proc_pointer
5312 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5313 && CLASS_DATA (ref
->u
.c
.component
)->attr
.pointer
))
5315 gfc_error ("Component to the right of a part reference "
5316 "with nonzero rank must not have the POINTER "
5317 "attribute at %L", &expr
->where
);
5320 else if (ref
->u
.c
.component
->attr
.allocatable
5321 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5322 && CLASS_DATA (ref
->u
.c
.component
)->attr
.allocatable
))
5325 gfc_error ("Component to the right of a part reference "
5326 "with nonzero rank must not have the ALLOCATABLE "
5327 "attribute at %L", &expr
->where
);
5339 /* Implement requirement in note 9.7 of F2018 that the result of the
5340 LEN inquiry be a scalar. */
5341 if (ref
->u
.i
== INQUIRY_LEN
&& array_ref
&& expr
->ts
.deferred
)
5343 array_ref
->u
.ar
.type
= AR_ELEMENT
;
5345 /* INQUIRY_LEN is not evaluated from the rest of the expr
5346 but directly from the string length. This means that setting
5347 the array indices to one does not matter but might trigger
5348 a runtime bounds error. Suppress the check. */
5349 expr
->no_bounds_check
= 1;
5350 for (dim
= 0; dim
< array_ref
->u
.ar
.dimen
; dim
++)
5352 array_ref
->u
.ar
.dimen_type
[dim
] = DIMEN_ELEMENT
;
5353 if (array_ref
->u
.ar
.start
[dim
])
5354 gfc_free_expr (array_ref
->u
.ar
.start
[dim
]);
5355 array_ref
->u
.ar
.start
[dim
]
5356 = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
5357 if (array_ref
->u
.ar
.end
[dim
])
5358 gfc_free_expr (array_ref
->u
.ar
.end
[dim
]);
5359 if (array_ref
->u
.ar
.stride
[dim
])
5360 gfc_free_expr (array_ref
->u
.ar
.stride
[dim
]);
5366 if (((ref
->type
== REF_COMPONENT
&& n_components
> 1)
5367 || ref
->next
== NULL
)
5368 && current_part_dimension
5369 && seen_part_dimension
)
5371 gfc_error ("Two or more part references with nonzero rank must "
5372 "not be specified at %L", &expr
->where
);
5376 if (ref
->type
== REF_COMPONENT
)
5378 if (current_part_dimension
)
5379 seen_part_dimension
= 1;
5381 /* reset to make sure */
5382 current_part_dimension
= 0;
5390 /* Given an expression, determine its shape. This is easier than it sounds.
5391 Leaves the shape array NULL if it is not possible to determine the shape. */
5394 expression_shape (gfc_expr
*e
)
5396 mpz_t array
[GFC_MAX_DIMENSIONS
];
5399 if (e
->rank
<= 0 || e
->shape
!= NULL
)
5402 for (i
= 0; i
< e
->rank
; i
++)
5403 if (!gfc_array_dimen_size (e
, i
, &array
[i
]))
5406 e
->shape
= gfc_get_shape (e
->rank
);
5408 memcpy (e
->shape
, array
, e
->rank
* sizeof (mpz_t
));
5413 for (i
--; i
>= 0; i
--)
5414 mpz_clear (array
[i
]);
5418 /* Given a variable expression node, compute the rank of the expression by
5419 examining the base symbol and any reference structures it may have. */
5422 gfc_expression_rank (gfc_expr
*e
)
5427 /* Just to make sure, because EXPR_COMPCALL's also have an e->ref and that
5428 could lead to serious confusion... */
5429 gcc_assert (e
->expr_type
!= EXPR_COMPCALL
);
5433 if (e
->expr_type
== EXPR_ARRAY
)
5435 /* Constructors can have a rank different from one via RESHAPE(). */
5437 e
->rank
= ((e
->symtree
== NULL
|| e
->symtree
->n
.sym
->as
== NULL
)
5438 ? 0 : e
->symtree
->n
.sym
->as
->rank
);
5444 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5446 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.proc_pointer
5447 && ref
->u
.c
.component
->attr
.function
&& !ref
->next
)
5448 rank
= ref
->u
.c
.component
->as
? ref
->u
.c
.component
->as
->rank
: 0;
5450 if (ref
->type
!= REF_ARRAY
)
5453 if (ref
->u
.ar
.type
== AR_FULL
)
5455 rank
= ref
->u
.ar
.as
->rank
;
5459 if (ref
->u
.ar
.type
== AR_SECTION
)
5461 /* Figure out the rank of the section. */
5463 gfc_internal_error ("gfc_expression_rank(): Two array specs");
5465 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
5466 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_RANGE
5467 || ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
)
5477 expression_shape (e
);
5482 add_caf_get_intrinsic (gfc_expr
*e
)
5484 gfc_expr
*wrapper
, *tmp_expr
;
5488 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5489 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5494 for (n
= ref
->u
.ar
.dimen
; n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
5495 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_ELEMENT
)
5498 tmp_expr
= XCNEW (gfc_expr
);
5500 wrapper
= gfc_build_intrinsic_call (gfc_current_ns
, GFC_ISYM_CAF_GET
,
5501 "caf_get", tmp_expr
->where
, 1, tmp_expr
);
5502 wrapper
->ts
= e
->ts
;
5503 wrapper
->rank
= e
->rank
;
5505 wrapper
->shape
= gfc_copy_shape (e
->shape
, e
->rank
);
5512 remove_caf_get_intrinsic (gfc_expr
*e
)
5514 gcc_assert (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
5515 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
);
5516 gfc_expr
*e2
= e
->value
.function
.actual
->expr
;
5517 e
->value
.function
.actual
->expr
= NULL
;
5518 gfc_free_actual_arglist (e
->value
.function
.actual
);
5519 gfc_free_shape (&e
->shape
, e
->rank
);
5525 /* Resolve a variable expression. */
5528 resolve_variable (gfc_expr
*e
)
5535 if (e
->symtree
== NULL
)
5537 sym
= e
->symtree
->n
.sym
;
5539 /* Use same check as for TYPE(*) below; this check has to be before TYPE(*)
5540 as ts.type is set to BT_ASSUMED in resolve_symbol. */
5541 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
5543 if (!actual_arg
|| inquiry_argument
)
5545 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may only "
5546 "be used as actual argument", sym
->name
, &e
->where
);
5550 /* TS 29113, 407b. */
5551 else if (e
->ts
.type
== BT_ASSUMED
)
5555 gfc_error ("Assumed-type variable %s at %L may only be used "
5556 "as actual argument", sym
->name
, &e
->where
);
5559 else if (inquiry_argument
&& !first_actual_arg
)
5561 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5562 for all inquiry functions in resolve_function; the reason is
5563 that the function-name resolution happens too late in that
5565 gfc_error ("Assumed-type variable %s at %L as actual argument to "
5566 "an inquiry function shall be the first argument",
5567 sym
->name
, &e
->where
);
5571 /* TS 29113, C535b. */
5572 else if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5573 && CLASS_DATA (sym
)->as
5574 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5575 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5576 && sym
->as
->type
== AS_ASSUMED_RANK
))
5577 && !sym
->attr
.select_rank_temporary
)
5580 && !(cs_base
&& cs_base
->current
5581 && cs_base
->current
->op
== EXEC_SELECT_RANK
))
5583 gfc_error ("Assumed-rank variable %s at %L may only be used as "
5584 "actual argument", sym
->name
, &e
->where
);
5587 else if (inquiry_argument
&& !first_actual_arg
)
5589 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5590 for all inquiry functions in resolve_function; the reason is
5591 that the function-name resolution happens too late in that
5593 gfc_error ("Assumed-rank variable %s at %L as actual argument "
5594 "to an inquiry function shall be the first argument",
5595 sym
->name
, &e
->where
);
5600 if ((sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
)) && e
->ref
5601 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5602 && e
->ref
->next
== NULL
))
5604 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall not have "
5605 "a subobject reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5608 /* TS 29113, 407b. */
5609 else if (e
->ts
.type
== BT_ASSUMED
&& e
->ref
5610 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5611 && e
->ref
->next
== NULL
))
5613 gfc_error ("Assumed-type variable %s at %L shall not have a subobject "
5614 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5618 /* TS 29113, C535b. */
5619 if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5620 && CLASS_DATA (sym
)->as
5621 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5622 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5623 && sym
->as
->type
== AS_ASSUMED_RANK
))
5625 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5626 && e
->ref
->next
== NULL
))
5628 gfc_error ("Assumed-rank variable %s at %L shall not have a subobject "
5629 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5633 /* For variables that are used in an associate (target => object) where
5634 the object's basetype is array valued while the target is scalar,
5635 the ts' type of the component refs is still array valued, which
5636 can't be translated that way. */
5637 if (sym
->assoc
&& e
->rank
== 0 && e
->ref
&& sym
->ts
.type
== BT_CLASS
5638 && sym
->assoc
->target
&& sym
->assoc
->target
->ts
.type
== BT_CLASS
5639 && CLASS_DATA (sym
->assoc
->target
)->as
)
5641 gfc_ref
*ref
= e
->ref
;
5647 ref
->u
.c
.sym
= sym
->ts
.u
.derived
;
5648 /* Stop the loop. */
5658 /* If this is an associate-name, it may be parsed with an array reference
5659 in error even though the target is scalar. Fail directly in this case.
5660 TODO Understand why class scalar expressions must be excluded. */
5661 if (sym
->assoc
&& !(sym
->ts
.type
== BT_CLASS
&& e
->rank
== 0))
5663 if (sym
->ts
.type
== BT_CLASS
)
5664 gfc_fix_class_refs (e
);
5665 if (!sym
->attr
.dimension
&& e
->ref
&& e
->ref
->type
== REF_ARRAY
)
5667 else if (sym
->attr
.dimension
&& (!e
->ref
|| e
->ref
->type
!= REF_ARRAY
))
5669 /* This can happen because the parser did not detect that the
5670 associate name is an array and the expression had no array
5672 gfc_ref
*ref
= gfc_get_ref ();
5673 ref
->type
= REF_ARRAY
;
5674 ref
->u
.ar
= *gfc_get_array_ref();
5675 ref
->u
.ar
.type
= AR_FULL
;
5678 ref
->u
.ar
.as
= sym
->as
;
5679 ref
->u
.ar
.dimen
= sym
->as
->rank
;
5687 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.generic
)
5688 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
5690 /* On the other hand, the parser may not have known this is an array;
5691 in this case, we have to add a FULL reference. */
5692 if (sym
->assoc
&& sym
->attr
.dimension
&& !e
->ref
)
5694 e
->ref
= gfc_get_ref ();
5695 e
->ref
->type
= REF_ARRAY
;
5696 e
->ref
->u
.ar
.type
= AR_FULL
;
5697 e
->ref
->u
.ar
.dimen
= 0;
5700 /* Like above, but for class types, where the checking whether an array
5701 ref is present is more complicated. Furthermore make sure not to add
5702 the full array ref to _vptr or _len refs. */
5703 if (sym
->assoc
&& sym
->ts
.type
== BT_CLASS
5704 && CLASS_DATA (sym
)->attr
.dimension
5705 && (e
->ts
.type
!= BT_DERIVED
|| !e
->ts
.u
.derived
->attr
.vtype
))
5707 gfc_ref
*ref
, *newref
;
5709 newref
= gfc_get_ref ();
5710 newref
->type
= REF_ARRAY
;
5711 newref
->u
.ar
.type
= AR_FULL
;
5712 newref
->u
.ar
.dimen
= 0;
5713 /* Because this is an associate var and the first ref either is a ref to
5714 the _data component or not, no traversal of the ref chain is
5715 needed. The array ref needs to be inserted after the _data ref,
5716 or when that is not present, which may happend for polymorphic
5717 types, then at the first position. */
5721 else if (ref
->type
== REF_COMPONENT
5722 && strcmp ("_data", ref
->u
.c
.component
->name
) == 0)
5724 if (!ref
->next
|| ref
->next
->type
!= REF_ARRAY
)
5726 newref
->next
= ref
->next
;
5730 /* Array ref present already. */
5731 gfc_free_ref_list (newref
);
5733 else if (ref
->type
== REF_ARRAY
)
5734 /* Array ref present already. */
5735 gfc_free_ref_list (newref
);
5743 if (e
->ref
&& !gfc_resolve_ref (e
))
5746 if (sym
->attr
.flavor
== FL_PROCEDURE
5747 && (!sym
->attr
.function
5748 || (sym
->attr
.function
&& sym
->result
5749 && sym
->result
->attr
.proc_pointer
5750 && !sym
->result
->attr
.function
)))
5752 e
->ts
.type
= BT_PROCEDURE
;
5753 goto resolve_procedure
;
5756 if (sym
->ts
.type
!= BT_UNKNOWN
)
5757 gfc_variable_attr (e
, &e
->ts
);
5758 else if (sym
->attr
.flavor
== FL_PROCEDURE
5759 && sym
->attr
.function
&& sym
->result
5760 && sym
->result
->ts
.type
!= BT_UNKNOWN
5761 && sym
->result
->attr
.proc_pointer
)
5762 e
->ts
= sym
->result
->ts
;
5765 /* Must be a simple variable reference. */
5766 if (!gfc_set_default_type (sym
, 1, sym
->ns
))
5771 if (check_assumed_size_reference (sym
, e
))
5774 /* Deal with forward references to entries during gfc_resolve_code, to
5775 satisfy, at least partially, 12.5.2.5. */
5776 if (gfc_current_ns
->entries
5777 && current_entry_id
== sym
->entry_id
5780 && cs_base
->current
->op
!= EXEC_ENTRY
)
5782 gfc_entry_list
*entry
;
5783 gfc_formal_arglist
*formal
;
5785 bool seen
, saved_specification_expr
;
5787 /* If the symbol is a dummy... */
5788 if (sym
->attr
.dummy
&& sym
->ns
== gfc_current_ns
)
5790 entry
= gfc_current_ns
->entries
;
5793 /* ...test if the symbol is a parameter of previous entries. */
5794 for (; entry
&& entry
->id
<= current_entry_id
; entry
= entry
->next
)
5795 for (formal
= entry
->sym
->formal
; formal
; formal
= formal
->next
)
5797 if (formal
->sym
&& sym
->name
== formal
->sym
->name
)
5804 /* If it has not been seen as a dummy, this is an error. */
5807 if (specification_expr
)
5808 gfc_error ("Variable %qs, used in a specification expression"
5809 ", is referenced at %L before the ENTRY statement "
5810 "in which it is a parameter",
5811 sym
->name
, &cs_base
->current
->loc
);
5813 gfc_error ("Variable %qs is used at %L before the ENTRY "
5814 "statement in which it is a parameter",
5815 sym
->name
, &cs_base
->current
->loc
);
5820 /* Now do the same check on the specification expressions. */
5821 saved_specification_expr
= specification_expr
;
5822 specification_expr
= true;
5823 if (sym
->ts
.type
== BT_CHARACTER
5824 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
5828 for (n
= 0; n
< sym
->as
->rank
; n
++)
5830 if (!gfc_resolve_expr (sym
->as
->lower
[n
]))
5832 if (!gfc_resolve_expr (sym
->as
->upper
[n
]))
5835 specification_expr
= saved_specification_expr
;
5838 /* Update the symbol's entry level. */
5839 sym
->entry_id
= current_entry_id
+ 1;
5842 /* If a symbol has been host_associated mark it. This is used latter,
5843 to identify if aliasing is possible via host association. */
5844 if (sym
->attr
.flavor
== FL_VARIABLE
5845 && gfc_current_ns
->parent
5846 && (gfc_current_ns
->parent
== sym
->ns
5847 || (gfc_current_ns
->parent
->parent
5848 && gfc_current_ns
->parent
->parent
== sym
->ns
)))
5849 sym
->attr
.host_assoc
= 1;
5851 if (gfc_current_ns
->proc_name
5852 && sym
->attr
.dimension
5853 && (sym
->ns
!= gfc_current_ns
5854 || sym
->attr
.use_assoc
5855 || sym
->attr
.in_common
))
5856 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
5859 if (t
&& !resolve_procedure_expression (e
))
5862 /* F2008, C617 and C1229. */
5863 if (!inquiry_argument
&& (e
->ts
.type
== BT_CLASS
|| e
->ts
.type
== BT_DERIVED
)
5864 && gfc_is_coindexed (e
))
5866 gfc_ref
*ref
, *ref2
= NULL
;
5868 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5870 if (ref
->type
== REF_COMPONENT
)
5872 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5876 for ( ; ref
; ref
= ref
->next
)
5877 if (ref
->type
== REF_COMPONENT
)
5880 /* Expression itself is not coindexed object. */
5881 if (ref
&& e
->ts
.type
== BT_CLASS
)
5883 gfc_error ("Polymorphic subobject of coindexed object at %L",
5888 /* Expression itself is coindexed object. */
5892 c
= ref2
? ref2
->u
.c
.component
: e
->symtree
->n
.sym
->components
;
5893 for ( ; c
; c
= c
->next
)
5894 if (c
->attr
.allocatable
&& c
->ts
.type
== BT_CLASS
)
5896 gfc_error ("Coindexed object with polymorphic allocatable "
5897 "subcomponent at %L", &e
->where
);
5905 gfc_expression_rank (e
);
5907 if (t
&& flag_coarray
== GFC_FCOARRAY_LIB
&& gfc_is_coindexed (e
))
5908 add_caf_get_intrinsic (e
);
5910 /* Simplify cases where access to a parameter array results in a
5911 single constant. Suppress errors since those will have been
5912 issued before, as warnings. */
5913 if (e
->rank
== 0 && sym
->as
&& sym
->attr
.flavor
== FL_PARAMETER
)
5915 gfc_push_suppress_errors ();
5916 gfc_simplify_expr (e
, 1);
5917 gfc_pop_suppress_errors ();
5924 /* Checks to see that the correct symbol has been host associated.
5925 The only situation where this arises is that in which a twice
5926 contained function is parsed after the host association is made.
5927 Therefore, on detecting this, change the symbol in the expression
5928 and convert the array reference into an actual arglist if the old
5929 symbol is a variable. */
5931 check_host_association (gfc_expr
*e
)
5933 gfc_symbol
*sym
, *old_sym
;
5937 gfc_actual_arglist
*arg
, *tail
= NULL
;
5938 bool retval
= e
->expr_type
== EXPR_FUNCTION
;
5940 /* If the expression is the result of substitution in
5941 interface.c(gfc_extend_expr) because there is no way in
5942 which the host association can be wrong. */
5943 if (e
->symtree
== NULL
5944 || e
->symtree
->n
.sym
== NULL
5945 || e
->user_operator
)
5948 old_sym
= e
->symtree
->n
.sym
;
5950 if (gfc_current_ns
->parent
5951 && old_sym
->ns
!= gfc_current_ns
)
5953 /* Use the 'USE' name so that renamed module symbols are
5954 correctly handled. */
5955 gfc_find_symbol (e
->symtree
->name
, gfc_current_ns
, 1, &sym
);
5957 if (sym
&& old_sym
!= sym
5958 && sym
->ts
.type
== old_sym
->ts
.type
5959 && sym
->attr
.flavor
== FL_PROCEDURE
5960 && sym
->attr
.contained
)
5962 /* Clear the shape, since it might not be valid. */
5963 gfc_free_shape (&e
->shape
, e
->rank
);
5965 /* Give the expression the right symtree! */
5966 gfc_find_sym_tree (e
->symtree
->name
, NULL
, 1, &st
);
5967 gcc_assert (st
!= NULL
);
5969 if (old_sym
->attr
.flavor
== FL_PROCEDURE
5970 || e
->expr_type
== EXPR_FUNCTION
)
5972 /* Original was function so point to the new symbol, since
5973 the actual argument list is already attached to the
5975 e
->value
.function
.esym
= NULL
;
5980 /* Original was variable so convert array references into
5981 an actual arglist. This does not need any checking now
5982 since resolve_function will take care of it. */
5983 e
->value
.function
.actual
= NULL
;
5984 e
->expr_type
= EXPR_FUNCTION
;
5987 /* Ambiguity will not arise if the array reference is not
5988 the last reference. */
5989 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5990 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
5993 gcc_assert (ref
->type
== REF_ARRAY
);
5995 /* Grab the start expressions from the array ref and
5996 copy them into actual arguments. */
5997 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
5999 arg
= gfc_get_actual_arglist ();
6000 arg
->expr
= gfc_copy_expr (ref
->u
.ar
.start
[n
]);
6001 if (e
->value
.function
.actual
== NULL
)
6002 tail
= e
->value
.function
.actual
= arg
;
6010 /* Dump the reference list and set the rank. */
6011 gfc_free_ref_list (e
->ref
);
6013 e
->rank
= sym
->as
? sym
->as
->rank
: 0;
6016 gfc_resolve_expr (e
);
6020 /* This might have changed! */
6021 return e
->expr_type
== EXPR_FUNCTION
;
6026 gfc_resolve_character_operator (gfc_expr
*e
)
6028 gfc_expr
*op1
= e
->value
.op
.op1
;
6029 gfc_expr
*op2
= e
->value
.op
.op2
;
6030 gfc_expr
*e1
= NULL
;
6031 gfc_expr
*e2
= NULL
;
6033 gcc_assert (e
->value
.op
.op
== INTRINSIC_CONCAT
);
6035 if (op1
->ts
.u
.cl
&& op1
->ts
.u
.cl
->length
)
6036 e1
= gfc_copy_expr (op1
->ts
.u
.cl
->length
);
6037 else if (op1
->expr_type
== EXPR_CONSTANT
)
6038 e1
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
6039 op1
->value
.character
.length
);
6041 if (op2
->ts
.u
.cl
&& op2
->ts
.u
.cl
->length
)
6042 e2
= gfc_copy_expr (op2
->ts
.u
.cl
->length
);
6043 else if (op2
->expr_type
== EXPR_CONSTANT
)
6044 e2
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
6045 op2
->value
.character
.length
);
6047 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
6057 e
->ts
.u
.cl
->length
= gfc_add (e1
, e2
);
6058 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
6059 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
6060 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 0);
6061 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
6067 /* Ensure that an character expression has a charlen and, if possible, a
6068 length expression. */
6071 fixup_charlen (gfc_expr
*e
)
6073 /* The cases fall through so that changes in expression type and the need
6074 for multiple fixes are picked up. In all circumstances, a charlen should
6075 be available for the middle end to hang a backend_decl on. */
6076 switch (e
->expr_type
)
6079 gfc_resolve_character_operator (e
);
6083 if (e
->expr_type
== EXPR_ARRAY
)
6084 gfc_resolve_character_array_constructor (e
);
6087 case EXPR_SUBSTRING
:
6088 if (!e
->ts
.u
.cl
&& e
->ref
)
6089 gfc_resolve_substring_charlen (e
);
6094 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
6101 /* Update an actual argument to include the passed-object for type-bound
6102 procedures at the right position. */
6104 static gfc_actual_arglist
*
6105 update_arglist_pass (gfc_actual_arglist
* lst
, gfc_expr
* po
, unsigned argpos
,
6108 gcc_assert (argpos
> 0);
6112 gfc_actual_arglist
* result
;
6114 result
= gfc_get_actual_arglist ();
6118 result
->name
= name
;
6124 lst
->next
= update_arglist_pass (lst
->next
, po
, argpos
- 1, name
);
6126 lst
= update_arglist_pass (NULL
, po
, argpos
- 1, name
);
6131 /* Extract the passed-object from an EXPR_COMPCALL (a copy of it). */
6134 extract_compcall_passed_object (gfc_expr
* e
)
6138 if (e
->expr_type
== EXPR_UNKNOWN
)
6140 gfc_error ("Error in typebound call at %L",
6145 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6147 if (e
->value
.compcall
.base_object
)
6148 po
= gfc_copy_expr (e
->value
.compcall
.base_object
);
6151 po
= gfc_get_expr ();
6152 po
->expr_type
= EXPR_VARIABLE
;
6153 po
->symtree
= e
->symtree
;
6154 po
->ref
= gfc_copy_ref (e
->ref
);
6155 po
->where
= e
->where
;
6158 if (!gfc_resolve_expr (po
))
6165 /* Update the arglist of an EXPR_COMPCALL expression to include the
6169 update_compcall_arglist (gfc_expr
* e
)
6172 gfc_typebound_proc
* tbp
;
6174 tbp
= e
->value
.compcall
.tbp
;
6179 po
= extract_compcall_passed_object (e
);
6183 if (tbp
->nopass
|| e
->value
.compcall
.ignore_pass
)
6189 if (tbp
->pass_arg_num
<= 0)
6192 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6200 /* Extract the passed object from a PPC call (a copy of it). */
6203 extract_ppc_passed_object (gfc_expr
*e
)
6208 po
= gfc_get_expr ();
6209 po
->expr_type
= EXPR_VARIABLE
;
6210 po
->symtree
= e
->symtree
;
6211 po
->ref
= gfc_copy_ref (e
->ref
);
6212 po
->where
= e
->where
;
6214 /* Remove PPC reference. */
6216 while ((*ref
)->next
)
6217 ref
= &(*ref
)->next
;
6218 gfc_free_ref_list (*ref
);
6221 if (!gfc_resolve_expr (po
))
6228 /* Update the actual arglist of a procedure pointer component to include the
6232 update_ppc_arglist (gfc_expr
* e
)
6236 gfc_typebound_proc
* tb
;
6238 ppc
= gfc_get_proc_ptr_comp (e
);
6246 else if (tb
->nopass
)
6249 po
= extract_ppc_passed_object (e
);
6256 gfc_error ("Passed-object at %L must be scalar", &e
->where
);
6261 if (po
->ts
.type
== BT_DERIVED
&& po
->ts
.u
.derived
->attr
.abstract
)
6263 gfc_error ("Base object for procedure-pointer component call at %L is of"
6264 " ABSTRACT type %qs", &e
->where
, po
->ts
.u
.derived
->name
);
6268 gcc_assert (tb
->pass_arg_num
> 0);
6269 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6277 /* Check that the object a TBP is called on is valid, i.e. it must not be
6278 of ABSTRACT type (as in subobject%abstract_parent%tbp()). */
6281 check_typebound_baseobject (gfc_expr
* e
)
6284 bool return_value
= false;
6286 base
= extract_compcall_passed_object (e
);
6290 if (base
->ts
.type
!= BT_DERIVED
&& base
->ts
.type
!= BT_CLASS
)
6292 gfc_error ("Error in typebound call at %L", &e
->where
);
6296 if (base
->ts
.type
== BT_CLASS
&& !gfc_expr_attr (base
).class_ok
)
6300 if (base
->ts
.type
== BT_DERIVED
&& base
->ts
.u
.derived
->attr
.abstract
)
6302 gfc_error ("Base object for type-bound procedure call at %L is of"
6303 " ABSTRACT type %qs", &e
->where
, base
->ts
.u
.derived
->name
);
6307 /* F08:C1230. If the procedure called is NOPASS,
6308 the base object must be scalar. */
6309 if (e
->value
.compcall
.tbp
->nopass
&& base
->rank
!= 0)
6311 gfc_error ("Base object for NOPASS type-bound procedure call at %L must"
6312 " be scalar", &e
->where
);
6316 return_value
= true;
6319 gfc_free_expr (base
);
6320 return return_value
;
6324 /* Resolve a call to a type-bound procedure, either function or subroutine,
6325 statically from the data in an EXPR_COMPCALL expression. The adapted
6326 arglist and the target-procedure symtree are returned. */
6329 resolve_typebound_static (gfc_expr
* e
, gfc_symtree
** target
,
6330 gfc_actual_arglist
** actual
)
6332 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6333 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6335 /* Update the actual arglist for PASS. */
6336 if (!update_compcall_arglist (e
))
6339 *actual
= e
->value
.compcall
.actual
;
6340 *target
= e
->value
.compcall
.tbp
->u
.specific
;
6342 gfc_free_ref_list (e
->ref
);
6344 e
->value
.compcall
.actual
= NULL
;
6346 /* If we find a deferred typebound procedure, check for derived types
6347 that an overriding typebound procedure has not been missed. */
6348 if (e
->value
.compcall
.name
6349 && !e
->value
.compcall
.tbp
->non_overridable
6350 && e
->value
.compcall
.base_object
6351 && e
->value
.compcall
.base_object
->ts
.type
== BT_DERIVED
)
6354 gfc_symbol
*derived
;
6356 /* Use the derived type of the base_object. */
6357 derived
= e
->value
.compcall
.base_object
->ts
.u
.derived
;
6360 /* If necessary, go through the inheritance chain. */
6361 while (!st
&& derived
)
6363 /* Look for the typebound procedure 'name'. */
6364 if (derived
->f2k_derived
&& derived
->f2k_derived
->tb_sym_root
)
6365 st
= gfc_find_symtree (derived
->f2k_derived
->tb_sym_root
,
6366 e
->value
.compcall
.name
);
6368 derived
= gfc_get_derived_super_type (derived
);
6371 /* Now find the specific name in the derived type namespace. */
6372 if (st
&& st
->n
.tb
&& st
->n
.tb
->u
.specific
)
6373 gfc_find_sym_tree (st
->n
.tb
->u
.specific
->name
,
6374 derived
->ns
, 1, &st
);
6382 /* Get the ultimate declared type from an expression. In addition,
6383 return the last class/derived type reference and the copy of the
6384 reference list. If check_types is set true, derived types are
6385 identified as well as class references. */
6387 get_declared_from_expr (gfc_ref
**class_ref
, gfc_ref
**new_ref
,
6388 gfc_expr
*e
, bool check_types
)
6390 gfc_symbol
*declared
;
6397 *new_ref
= gfc_copy_ref (e
->ref
);
6399 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
6401 if (ref
->type
!= REF_COMPONENT
)
6404 if ((ref
->u
.c
.component
->ts
.type
== BT_CLASS
6405 || (check_types
&& gfc_bt_struct (ref
->u
.c
.component
->ts
.type
)))
6406 && ref
->u
.c
.component
->attr
.flavor
!= FL_PROCEDURE
)
6408 declared
= ref
->u
.c
.component
->ts
.u
.derived
;
6414 if (declared
== NULL
)
6415 declared
= e
->symtree
->n
.sym
->ts
.u
.derived
;
6421 /* Given an EXPR_COMPCALL calling a GENERIC typebound procedure, figure out
6422 which of the specific bindings (if any) matches the arglist and transform
6423 the expression into a call of that binding. */
6426 resolve_typebound_generic_call (gfc_expr
* e
, const char **name
)
6428 gfc_typebound_proc
* genproc
;
6429 const char* genname
;
6431 gfc_symbol
*derived
;
6433 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6434 genname
= e
->value
.compcall
.name
;
6435 genproc
= e
->value
.compcall
.tbp
;
6437 if (!genproc
->is_generic
)
6440 /* Try the bindings on this type and in the inheritance hierarchy. */
6441 for (; genproc
; genproc
= genproc
->overridden
)
6445 gcc_assert (genproc
->is_generic
);
6446 for (g
= genproc
->u
.generic
; g
; g
= g
->next
)
6449 gfc_actual_arglist
* args
;
6452 gcc_assert (g
->specific
);
6454 if (g
->specific
->error
)
6457 target
= g
->specific
->u
.specific
->n
.sym
;
6459 /* Get the right arglist by handling PASS/NOPASS. */
6460 args
= gfc_copy_actual_arglist (e
->value
.compcall
.actual
);
6461 if (!g
->specific
->nopass
)
6464 po
= extract_compcall_passed_object (e
);
6467 gfc_free_actual_arglist (args
);
6471 gcc_assert (g
->specific
->pass_arg_num
> 0);
6472 gcc_assert (!g
->specific
->error
);
6473 args
= update_arglist_pass (args
, po
, g
->specific
->pass_arg_num
,
6474 g
->specific
->pass_arg
);
6476 resolve_actual_arglist (args
, target
->attr
.proc
,
6477 is_external_proc (target
)
6478 && gfc_sym_get_dummy_args (target
) == NULL
);
6480 /* Check if this arglist matches the formal. */
6481 matches
= gfc_arglist_matches_symbol (&args
, target
);
6483 /* Clean up and break out of the loop if we've found it. */
6484 gfc_free_actual_arglist (args
);
6487 e
->value
.compcall
.tbp
= g
->specific
;
6488 genname
= g
->specific_st
->name
;
6489 /* Pass along the name for CLASS methods, where the vtab
6490 procedure pointer component has to be referenced. */
6498 /* Nothing matching found! */
6499 gfc_error ("Found no matching specific binding for the call to the GENERIC"
6500 " %qs at %L", genname
, &e
->where
);
6504 /* Make sure that we have the right specific instance for the name. */
6505 derived
= get_declared_from_expr (NULL
, NULL
, e
, true);
6507 st
= gfc_find_typebound_proc (derived
, NULL
, genname
, true, &e
->where
);
6509 e
->value
.compcall
.tbp
= st
->n
.tb
;
6515 /* Resolve a call to a type-bound subroutine. */
6518 resolve_typebound_call (gfc_code
* c
, const char **name
, bool *overridable
)
6520 gfc_actual_arglist
* newactual
;
6521 gfc_symtree
* target
;
6523 /* Check that's really a SUBROUTINE. */
6524 if (!c
->expr1
->value
.compcall
.tbp
->subroutine
)
6526 if (!c
->expr1
->value
.compcall
.tbp
->is_generic
6527 && c
->expr1
->value
.compcall
.tbp
->u
.specific
6528 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
6529 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
->attr
.subroutine
)
6530 c
->expr1
->value
.compcall
.tbp
->subroutine
= 1;
6533 gfc_error ("%qs at %L should be a SUBROUTINE",
6534 c
->expr1
->value
.compcall
.name
, &c
->loc
);
6539 if (!check_typebound_baseobject (c
->expr1
))
6542 /* Pass along the name for CLASS methods, where the vtab
6543 procedure pointer component has to be referenced. */
6545 *name
= c
->expr1
->value
.compcall
.name
;
6547 if (!resolve_typebound_generic_call (c
->expr1
, name
))
6550 /* Pass along the NON_OVERRIDABLE attribute of the specific TBP. */
6552 *overridable
= !c
->expr1
->value
.compcall
.tbp
->non_overridable
;
6554 /* Transform into an ordinary EXEC_CALL for now. */
6556 if (!resolve_typebound_static (c
->expr1
, &target
, &newactual
))
6559 c
->ext
.actual
= newactual
;
6560 c
->symtree
= target
;
6561 c
->op
= (c
->expr1
->value
.compcall
.assign
? EXEC_ASSIGN_CALL
: EXEC_CALL
);
6563 gcc_assert (!c
->expr1
->ref
&& !c
->expr1
->value
.compcall
.actual
);
6565 gfc_free_expr (c
->expr1
);
6566 c
->expr1
= gfc_get_expr ();
6567 c
->expr1
->expr_type
= EXPR_FUNCTION
;
6568 c
->expr1
->symtree
= target
;
6569 c
->expr1
->where
= c
->loc
;
6571 return resolve_call (c
);
6575 /* Resolve a component-call expression. */
6577 resolve_compcall (gfc_expr
* e
, const char **name
)
6579 gfc_actual_arglist
* newactual
;
6580 gfc_symtree
* target
;
6582 /* Check that's really a FUNCTION. */
6583 if (!e
->value
.compcall
.tbp
->function
)
6585 gfc_error ("%qs at %L should be a FUNCTION",
6586 e
->value
.compcall
.name
, &e
->where
);
6591 /* These must not be assign-calls! */
6592 gcc_assert (!e
->value
.compcall
.assign
);
6594 if (!check_typebound_baseobject (e
))
6597 /* Pass along the name for CLASS methods, where the vtab
6598 procedure pointer component has to be referenced. */
6600 *name
= e
->value
.compcall
.name
;
6602 if (!resolve_typebound_generic_call (e
, name
))
6604 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6606 /* Take the rank from the function's symbol. */
6607 if (e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
)
6608 e
->rank
= e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
->rank
;
6610 /* For now, we simply transform it into an EXPR_FUNCTION call with the same
6611 arglist to the TBP's binding target. */
6613 if (!resolve_typebound_static (e
, &target
, &newactual
))
6616 e
->value
.function
.actual
= newactual
;
6617 e
->value
.function
.name
= NULL
;
6618 e
->value
.function
.esym
= target
->n
.sym
;
6619 e
->value
.function
.isym
= NULL
;
6620 e
->symtree
= target
;
6621 e
->ts
= target
->n
.sym
->ts
;
6622 e
->expr_type
= EXPR_FUNCTION
;
6624 /* Resolution is not necessary if this is a class subroutine; this
6625 function only has to identify the specific proc. Resolution of
6626 the call will be done next in resolve_typebound_call. */
6627 return gfc_resolve_expr (e
);
6631 static bool resolve_fl_derived (gfc_symbol
*sym
);
6634 /* Resolve a typebound function, or 'method'. First separate all
6635 the non-CLASS references by calling resolve_compcall directly. */
6638 resolve_typebound_function (gfc_expr
* e
)
6640 gfc_symbol
*declared
;
6652 /* Deal with typebound operators for CLASS objects. */
6653 expr
= e
->value
.compcall
.base_object
;
6654 overridable
= !e
->value
.compcall
.tbp
->non_overridable
;
6655 if (expr
&& expr
->ts
.type
== BT_CLASS
&& e
->value
.compcall
.name
)
6657 /* Since the typebound operators are generic, we have to ensure
6658 that any delays in resolution are corrected and that the vtab
6661 declared
= ts
.u
.derived
;
6662 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6663 if (c
->ts
.u
.derived
== NULL
)
6664 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6666 if (!resolve_compcall (e
, &name
))
6669 /* Use the generic name if it is there. */
6670 name
= name
? name
: e
->value
.function
.esym
->name
;
6671 e
->symtree
= expr
->symtree
;
6672 e
->ref
= gfc_copy_ref (expr
->ref
);
6673 get_declared_from_expr (&class_ref
, NULL
, e
, false);
6675 /* Trim away the extraneous references that emerge from nested
6676 use of interface.c (extend_expr). */
6677 if (class_ref
&& class_ref
->next
)
6679 gfc_free_ref_list (class_ref
->next
);
6680 class_ref
->next
= NULL
;
6682 else if (e
->ref
&& !class_ref
&& expr
->ts
.type
!= BT_CLASS
)
6684 gfc_free_ref_list (e
->ref
);
6688 gfc_add_vptr_component (e
);
6689 gfc_add_component_ref (e
, name
);
6690 e
->value
.function
.esym
= NULL
;
6691 if (expr
->expr_type
!= EXPR_VARIABLE
)
6692 e
->base_expr
= expr
;
6697 return resolve_compcall (e
, NULL
);
6699 if (!gfc_resolve_ref (e
))
6702 /* Get the CLASS declared type. */
6703 declared
= get_declared_from_expr (&class_ref
, &new_ref
, e
, true);
6705 if (!resolve_fl_derived (declared
))
6708 /* Weed out cases of the ultimate component being a derived type. */
6709 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6710 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6712 gfc_free_ref_list (new_ref
);
6713 return resolve_compcall (e
, NULL
);
6716 c
= gfc_find_component (declared
, "_data", true, true, NULL
);
6718 /* Treat the call as if it is a typebound procedure, in order to roll
6719 out the correct name for the specific function. */
6720 if (!resolve_compcall (e
, &name
))
6722 gfc_free_ref_list (new_ref
);
6729 /* Convert the expression to a procedure pointer component call. */
6730 e
->value
.function
.esym
= NULL
;
6736 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6737 gfc_add_vptr_component (e
);
6738 gfc_add_component_ref (e
, name
);
6740 /* Recover the typespec for the expression. This is really only
6741 necessary for generic procedures, where the additional call
6742 to gfc_add_component_ref seems to throw the collection of the
6743 correct typespec. */
6747 gfc_free_ref_list (new_ref
);
6752 /* Resolve a typebound subroutine, or 'method'. First separate all
6753 the non-CLASS references by calling resolve_typebound_call
6757 resolve_typebound_subroutine (gfc_code
*code
)
6759 gfc_symbol
*declared
;
6769 st
= code
->expr1
->symtree
;
6771 /* Deal with typebound operators for CLASS objects. */
6772 expr
= code
->expr1
->value
.compcall
.base_object
;
6773 overridable
= !code
->expr1
->value
.compcall
.tbp
->non_overridable
;
6774 if (expr
&& expr
->ts
.type
== BT_CLASS
&& code
->expr1
->value
.compcall
.name
)
6776 /* If the base_object is not a variable, the corresponding actual
6777 argument expression must be stored in e->base_expression so
6778 that the corresponding tree temporary can be used as the base
6779 object in gfc_conv_procedure_call. */
6780 if (expr
->expr_type
!= EXPR_VARIABLE
)
6782 gfc_actual_arglist
*args
;
6784 args
= code
->expr1
->value
.function
.actual
;
6785 for (; args
; args
= args
->next
)
6786 if (expr
== args
->expr
)
6790 /* Since the typebound operators are generic, we have to ensure
6791 that any delays in resolution are corrected and that the vtab
6793 declared
= expr
->ts
.u
.derived
;
6794 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6795 if (c
->ts
.u
.derived
== NULL
)
6796 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6798 if (!resolve_typebound_call (code
, &name
, NULL
))
6801 /* Use the generic name if it is there. */
6802 name
= name
? name
: code
->expr1
->value
.function
.esym
->name
;
6803 code
->expr1
->symtree
= expr
->symtree
;
6804 code
->expr1
->ref
= gfc_copy_ref (expr
->ref
);
6806 /* Trim away the extraneous references that emerge from nested
6807 use of interface.c (extend_expr). */
6808 get_declared_from_expr (&class_ref
, NULL
, code
->expr1
, false);
6809 if (class_ref
&& class_ref
->next
)
6811 gfc_free_ref_list (class_ref
->next
);
6812 class_ref
->next
= NULL
;
6814 else if (code
->expr1
->ref
&& !class_ref
)
6816 gfc_free_ref_list (code
->expr1
->ref
);
6817 code
->expr1
->ref
= NULL
;
6820 /* Now use the procedure in the vtable. */
6821 gfc_add_vptr_component (code
->expr1
);
6822 gfc_add_component_ref (code
->expr1
, name
);
6823 code
->expr1
->value
.function
.esym
= NULL
;
6824 if (expr
->expr_type
!= EXPR_VARIABLE
)
6825 code
->expr1
->base_expr
= expr
;
6830 return resolve_typebound_call (code
, NULL
, NULL
);
6832 if (!gfc_resolve_ref (code
->expr1
))
6835 /* Get the CLASS declared type. */
6836 get_declared_from_expr (&class_ref
, &new_ref
, code
->expr1
, true);
6838 /* Weed out cases of the ultimate component being a derived type. */
6839 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6840 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6842 gfc_free_ref_list (new_ref
);
6843 return resolve_typebound_call (code
, NULL
, NULL
);
6846 if (!resolve_typebound_call (code
, &name
, &overridable
))
6848 gfc_free_ref_list (new_ref
);
6851 ts
= code
->expr1
->ts
;
6855 /* Convert the expression to a procedure pointer component call. */
6856 code
->expr1
->value
.function
.esym
= NULL
;
6857 code
->expr1
->symtree
= st
;
6860 code
->expr1
->ref
= new_ref
;
6862 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6863 gfc_add_vptr_component (code
->expr1
);
6864 gfc_add_component_ref (code
->expr1
, name
);
6866 /* Recover the typespec for the expression. This is really only
6867 necessary for generic procedures, where the additional call
6868 to gfc_add_component_ref seems to throw the collection of the
6869 correct typespec. */
6870 code
->expr1
->ts
= ts
;
6873 gfc_free_ref_list (new_ref
);
6879 /* Resolve a CALL to a Procedure Pointer Component (Subroutine). */
6882 resolve_ppc_call (gfc_code
* c
)
6884 gfc_component
*comp
;
6886 comp
= gfc_get_proc_ptr_comp (c
->expr1
);
6887 gcc_assert (comp
!= NULL
);
6889 c
->resolved_sym
= c
->expr1
->symtree
->n
.sym
;
6890 c
->expr1
->expr_type
= EXPR_VARIABLE
;
6892 if (!comp
->attr
.subroutine
)
6893 gfc_add_subroutine (&comp
->attr
, comp
->name
, &c
->expr1
->where
);
6895 if (!gfc_resolve_ref (c
->expr1
))
6898 if (!update_ppc_arglist (c
->expr1
))
6901 c
->ext
.actual
= c
->expr1
->value
.compcall
.actual
;
6903 if (!resolve_actual_arglist (c
->ext
.actual
, comp
->attr
.proc
,
6904 !(comp
->ts
.interface
6905 && comp
->ts
.interface
->formal
)))
6908 if (!pure_subroutine (comp
->ts
.interface
, comp
->name
, &c
->expr1
->where
))
6911 gfc_ppc_use (comp
, &c
->expr1
->value
.compcall
.actual
, &c
->expr1
->where
);
6917 /* Resolve a Function Call to a Procedure Pointer Component (Function). */
6920 resolve_expr_ppc (gfc_expr
* e
)
6922 gfc_component
*comp
;
6924 comp
= gfc_get_proc_ptr_comp (e
);
6925 gcc_assert (comp
!= NULL
);
6927 /* Convert to EXPR_FUNCTION. */
6928 e
->expr_type
= EXPR_FUNCTION
;
6929 e
->value
.function
.isym
= NULL
;
6930 e
->value
.function
.actual
= e
->value
.compcall
.actual
;
6932 if (comp
->as
!= NULL
)
6933 e
->rank
= comp
->as
->rank
;
6935 if (!comp
->attr
.function
)
6936 gfc_add_function (&comp
->attr
, comp
->name
, &e
->where
);
6938 if (!gfc_resolve_ref (e
))
6941 if (!resolve_actual_arglist (e
->value
.function
.actual
, comp
->attr
.proc
,
6942 !(comp
->ts
.interface
6943 && comp
->ts
.interface
->formal
)))
6946 if (!update_ppc_arglist (e
))
6949 if (!check_pure_function(e
))
6952 gfc_ppc_use (comp
, &e
->value
.compcall
.actual
, &e
->where
);
6959 gfc_is_expandable_expr (gfc_expr
*e
)
6961 gfc_constructor
*con
;
6963 if (e
->expr_type
== EXPR_ARRAY
)
6965 /* Traverse the constructor looking for variables that are flavor
6966 parameter. Parameters must be expanded since they are fully used at
6968 con
= gfc_constructor_first (e
->value
.constructor
);
6969 for (; con
; con
= gfc_constructor_next (con
))
6971 if (con
->expr
->expr_type
== EXPR_VARIABLE
6972 && con
->expr
->symtree
6973 && (con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
6974 || con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_VARIABLE
))
6976 if (con
->expr
->expr_type
== EXPR_ARRAY
6977 && gfc_is_expandable_expr (con
->expr
))
6986 /* Sometimes variables in specification expressions of the result
6987 of module procedures in submodules wind up not being the 'real'
6988 dummy. Find this, if possible, in the namespace of the first
6992 fixup_unique_dummy (gfc_expr
*e
)
6994 gfc_symtree
*st
= NULL
;
6995 gfc_symbol
*s
= NULL
;
6997 if (e
->symtree
->n
.sym
->ns
->proc_name
6998 && e
->symtree
->n
.sym
->ns
->proc_name
->formal
)
6999 s
= e
->symtree
->n
.sym
->ns
->proc_name
->formal
->sym
;
7002 st
= gfc_find_symtree (s
->ns
->sym_root
, e
->symtree
->n
.sym
->name
);
7005 && st
->n
.sym
!= NULL
7006 && st
->n
.sym
->attr
.dummy
)
7010 /* Resolve an expression. That is, make sure that types of operands agree
7011 with their operators, intrinsic operators are converted to function calls
7012 for overloaded types and unresolved function references are resolved. */
7015 gfc_resolve_expr (gfc_expr
*e
)
7018 bool inquiry_save
, actual_arg_save
, first_actual_arg_save
;
7020 if (e
== NULL
|| e
->do_not_resolve_again
)
7023 /* inquiry_argument only applies to variables. */
7024 inquiry_save
= inquiry_argument
;
7025 actual_arg_save
= actual_arg
;
7026 first_actual_arg_save
= first_actual_arg
;
7028 if (e
->expr_type
!= EXPR_VARIABLE
)
7030 inquiry_argument
= false;
7032 first_actual_arg
= false;
7034 else if (e
->symtree
!= NULL
7035 && *e
->symtree
->name
== '@'
7036 && e
->symtree
->n
.sym
->attr
.dummy
)
7038 /* Deal with submodule specification expressions that are not
7039 found to be referenced in module.c(read_cleanup). */
7040 fixup_unique_dummy (e
);
7043 switch (e
->expr_type
)
7046 t
= resolve_operator (e
);
7052 if (check_host_association (e
))
7053 t
= resolve_function (e
);
7055 t
= resolve_variable (e
);
7057 if (e
->ts
.type
== BT_CHARACTER
&& e
->ts
.u
.cl
== NULL
&& e
->ref
7058 && e
->ref
->type
!= REF_SUBSTRING
)
7059 gfc_resolve_substring_charlen (e
);
7064 t
= resolve_typebound_function (e
);
7067 case EXPR_SUBSTRING
:
7068 t
= gfc_resolve_ref (e
);
7077 t
= resolve_expr_ppc (e
);
7082 if (!gfc_resolve_ref (e
))
7085 t
= gfc_resolve_array_constructor (e
);
7086 /* Also try to expand a constructor. */
7089 gfc_expression_rank (e
);
7090 if (gfc_is_constant_expr (e
) || gfc_is_expandable_expr (e
))
7091 gfc_expand_constructor (e
, false);
7094 /* This provides the opportunity for the length of constructors with
7095 character valued function elements to propagate the string length
7096 to the expression. */
7097 if (t
&& e
->ts
.type
== BT_CHARACTER
)
7099 /* For efficiency, we call gfc_expand_constructor for BT_CHARACTER
7100 here rather then add a duplicate test for it above. */
7101 gfc_expand_constructor (e
, false);
7102 t
= gfc_resolve_character_array_constructor (e
);
7107 case EXPR_STRUCTURE
:
7108 t
= gfc_resolve_ref (e
);
7112 t
= resolve_structure_cons (e
, 0);
7116 t
= gfc_simplify_expr (e
, 0);
7120 gfc_internal_error ("gfc_resolve_expr(): Bad expression type");
7123 if (e
->ts
.type
== BT_CHARACTER
&& t
&& !e
->ts
.u
.cl
)
7126 inquiry_argument
= inquiry_save
;
7127 actual_arg
= actual_arg_save
;
7128 first_actual_arg
= first_actual_arg_save
;
7130 /* For some reason, resolving these expressions a second time mangles
7131 the typespec of the expression itself. */
7132 if (t
&& e
->expr_type
== EXPR_VARIABLE
7133 && e
->symtree
->n
.sym
->attr
.select_rank_temporary
7134 && UNLIMITED_POLY (e
->symtree
->n
.sym
))
7135 e
->do_not_resolve_again
= 1;
7141 /* Resolve an expression from an iterator. They must be scalar and have
7142 INTEGER or (optionally) REAL type. */
7145 gfc_resolve_iterator_expr (gfc_expr
*expr
, bool real_ok
,
7146 const char *name_msgid
)
7148 if (!gfc_resolve_expr (expr
))
7151 if (expr
->rank
!= 0)
7153 gfc_error ("%s at %L must be a scalar", _(name_msgid
), &expr
->where
);
7157 if (expr
->ts
.type
!= BT_INTEGER
)
7159 if (expr
->ts
.type
== BT_REAL
)
7162 return gfc_notify_std (GFC_STD_F95_DEL
,
7163 "%s at %L must be integer",
7164 _(name_msgid
), &expr
->where
);
7167 gfc_error ("%s at %L must be INTEGER", _(name_msgid
),
7174 gfc_error ("%s at %L must be INTEGER", _(name_msgid
), &expr
->where
);
7182 /* Resolve the expressions in an iterator structure. If REAL_OK is
7183 false allow only INTEGER type iterators, otherwise allow REAL types.
7184 Set own_scope to true for ac-implied-do and data-implied-do as those
7185 have a separate scope such that, e.g., a INTENT(IN) doesn't apply. */
7188 gfc_resolve_iterator (gfc_iterator
*iter
, bool real_ok
, bool own_scope
)
7190 if (!gfc_resolve_iterator_expr (iter
->var
, real_ok
, "Loop variable"))
7193 if (!gfc_check_vardef_context (iter
->var
, false, false, own_scope
,
7194 _("iterator variable")))
7197 if (!gfc_resolve_iterator_expr (iter
->start
, real_ok
,
7198 "Start expression in DO loop"))
7201 if (!gfc_resolve_iterator_expr (iter
->end
, real_ok
,
7202 "End expression in DO loop"))
7205 if (!gfc_resolve_iterator_expr (iter
->step
, real_ok
,
7206 "Step expression in DO loop"))
7209 /* Convert start, end, and step to the same type as var. */
7210 if (iter
->start
->ts
.kind
!= iter
->var
->ts
.kind
7211 || iter
->start
->ts
.type
!= iter
->var
->ts
.type
)
7212 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7214 if (iter
->end
->ts
.kind
!= iter
->var
->ts
.kind
7215 || iter
->end
->ts
.type
!= iter
->var
->ts
.type
)
7216 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7218 if (iter
->step
->ts
.kind
!= iter
->var
->ts
.kind
7219 || iter
->step
->ts
.type
!= iter
->var
->ts
.type
)
7220 gfc_convert_type (iter
->step
, &iter
->var
->ts
, 1);
7222 if (iter
->step
->expr_type
== EXPR_CONSTANT
)
7224 if ((iter
->step
->ts
.type
== BT_INTEGER
7225 && mpz_cmp_ui (iter
->step
->value
.integer
, 0) == 0)
7226 || (iter
->step
->ts
.type
== BT_REAL
7227 && mpfr_sgn (iter
->step
->value
.real
) == 0))
7229 gfc_error ("Step expression in DO loop at %L cannot be zero",
7230 &iter
->step
->where
);
7235 if (iter
->start
->expr_type
== EXPR_CONSTANT
7236 && iter
->end
->expr_type
== EXPR_CONSTANT
7237 && iter
->step
->expr_type
== EXPR_CONSTANT
)
7240 if (iter
->start
->ts
.type
== BT_INTEGER
)
7242 sgn
= mpz_cmp_ui (iter
->step
->value
.integer
, 0);
7243 cmp
= mpz_cmp (iter
->end
->value
.integer
, iter
->start
->value
.integer
);
7247 sgn
= mpfr_sgn (iter
->step
->value
.real
);
7248 cmp
= mpfr_cmp (iter
->end
->value
.real
, iter
->start
->value
.real
);
7250 if (warn_zerotrip
&& ((sgn
> 0 && cmp
< 0) || (sgn
< 0 && cmp
> 0)))
7251 gfc_warning (OPT_Wzerotrip
,
7252 "DO loop at %L will be executed zero times",
7253 &iter
->step
->where
);
7256 if (iter
->end
->expr_type
== EXPR_CONSTANT
7257 && iter
->end
->ts
.type
== BT_INTEGER
7258 && iter
->step
->expr_type
== EXPR_CONSTANT
7259 && iter
->step
->ts
.type
== BT_INTEGER
7260 && (mpz_cmp_si (iter
->step
->value
.integer
, -1L) == 0
7261 || mpz_cmp_si (iter
->step
->value
.integer
, 1L) == 0))
7263 bool is_step_positive
= mpz_cmp_ui (iter
->step
->value
.integer
, 1) == 0;
7264 int k
= gfc_validate_kind (BT_INTEGER
, iter
->end
->ts
.kind
, false);
7266 if (is_step_positive
7267 && mpz_cmp (iter
->end
->value
.integer
, gfc_integer_kinds
[k
].huge
) == 0)
7268 gfc_warning (OPT_Wundefined_do_loop
,
7269 "DO loop at %L is undefined as it overflows",
7270 &iter
->step
->where
);
7271 else if (!is_step_positive
7272 && mpz_cmp (iter
->end
->value
.integer
,
7273 gfc_integer_kinds
[k
].min_int
) == 0)
7274 gfc_warning (OPT_Wundefined_do_loop
,
7275 "DO loop at %L is undefined as it underflows",
7276 &iter
->step
->where
);
7283 /* Traversal function for find_forall_index. f == 2 signals that
7284 that variable itself is not to be checked - only the references. */
7287 forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int *f
)
7289 if (expr
->expr_type
!= EXPR_VARIABLE
)
7292 /* A scalar assignment */
7293 if (!expr
->ref
|| *f
== 1)
7295 if (expr
->symtree
->n
.sym
== sym
)
7307 /* Check whether the FORALL index appears in the expression or not.
7308 Returns true if SYM is found in EXPR. */
7311 find_forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int f
)
7313 if (gfc_traverse_expr (expr
, sym
, forall_index
, f
))
7320 /* Resolve a list of FORALL iterators. The FORALL index-name is constrained
7321 to be a scalar INTEGER variable. The subscripts and stride are scalar
7322 INTEGERs, and if stride is a constant it must be nonzero.
7323 Furthermore "A subscript or stride in a forall-triplet-spec shall
7324 not contain a reference to any index-name in the
7325 forall-triplet-spec-list in which it appears." (7.5.4.1) */
7328 resolve_forall_iterators (gfc_forall_iterator
*it
)
7330 gfc_forall_iterator
*iter
, *iter2
;
7332 for (iter
= it
; iter
; iter
= iter
->next
)
7334 if (gfc_resolve_expr (iter
->var
)
7335 && (iter
->var
->ts
.type
!= BT_INTEGER
|| iter
->var
->rank
!= 0))
7336 gfc_error ("FORALL index-name at %L must be a scalar INTEGER",
7339 if (gfc_resolve_expr (iter
->start
)
7340 && (iter
->start
->ts
.type
!= BT_INTEGER
|| iter
->start
->rank
!= 0))
7341 gfc_error ("FORALL start expression at %L must be a scalar INTEGER",
7342 &iter
->start
->where
);
7343 if (iter
->var
->ts
.kind
!= iter
->start
->ts
.kind
)
7344 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7346 if (gfc_resolve_expr (iter
->end
)
7347 && (iter
->end
->ts
.type
!= BT_INTEGER
|| iter
->end
->rank
!= 0))
7348 gfc_error ("FORALL end expression at %L must be a scalar INTEGER",
7350 if (iter
->var
->ts
.kind
!= iter
->end
->ts
.kind
)
7351 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7353 if (gfc_resolve_expr (iter
->stride
))
7355 if (iter
->stride
->ts
.type
!= BT_INTEGER
|| iter
->stride
->rank
!= 0)
7356 gfc_error ("FORALL stride expression at %L must be a scalar %s",
7357 &iter
->stride
->where
, "INTEGER");
7359 if (iter
->stride
->expr_type
== EXPR_CONSTANT
7360 && mpz_cmp_ui (iter
->stride
->value
.integer
, 0) == 0)
7361 gfc_error ("FORALL stride expression at %L cannot be zero",
7362 &iter
->stride
->where
);
7364 if (iter
->var
->ts
.kind
!= iter
->stride
->ts
.kind
)
7365 gfc_convert_type (iter
->stride
, &iter
->var
->ts
, 1);
7368 for (iter
= it
; iter
; iter
= iter
->next
)
7369 for (iter2
= iter
; iter2
; iter2
= iter2
->next
)
7371 if (find_forall_index (iter2
->start
, iter
->var
->symtree
->n
.sym
, 0)
7372 || find_forall_index (iter2
->end
, iter
->var
->symtree
->n
.sym
, 0)
7373 || find_forall_index (iter2
->stride
, iter
->var
->symtree
->n
.sym
, 0))
7374 gfc_error ("FORALL index %qs may not appear in triplet "
7375 "specification at %L", iter
->var
->symtree
->name
,
7376 &iter2
->start
->where
);
7381 /* Given a pointer to a symbol that is a derived type, see if it's
7382 inaccessible, i.e. if it's defined in another module and the components are
7383 PRIVATE. The search is recursive if necessary. Returns zero if no
7384 inaccessible components are found, nonzero otherwise. */
7387 derived_inaccessible (gfc_symbol
*sym
)
7391 if (sym
->attr
.use_assoc
&& sym
->attr
.private_comp
)
7394 for (c
= sym
->components
; c
; c
= c
->next
)
7396 /* Prevent an infinite loop through this function. */
7397 if (c
->ts
.type
== BT_DERIVED
&& c
->attr
.pointer
7398 && sym
== c
->ts
.u
.derived
)
7401 if (c
->ts
.type
== BT_DERIVED
&& derived_inaccessible (c
->ts
.u
.derived
))
7409 /* Resolve the argument of a deallocate expression. The expression must be
7410 a pointer or a full array. */
7413 resolve_deallocate_expr (gfc_expr
*e
)
7415 symbol_attribute attr
;
7416 int allocatable
, pointer
;
7422 if (!gfc_resolve_expr (e
))
7425 if (e
->expr_type
!= EXPR_VARIABLE
)
7428 sym
= e
->symtree
->n
.sym
;
7429 unlimited
= UNLIMITED_POLY(sym
);
7431 if (sym
->ts
.type
== BT_CLASS
)
7433 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7434 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7438 allocatable
= sym
->attr
.allocatable
;
7439 pointer
= sym
->attr
.pointer
;
7441 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7446 if (ref
->u
.ar
.type
!= AR_FULL
7447 && !(ref
->u
.ar
.type
== AR_ELEMENT
&& ref
->u
.ar
.as
->rank
== 0
7448 && ref
->u
.ar
.codimen
&& gfc_ref_this_image (ref
)))
7453 c
= ref
->u
.c
.component
;
7454 if (c
->ts
.type
== BT_CLASS
)
7456 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7457 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7461 allocatable
= c
->attr
.allocatable
;
7462 pointer
= c
->attr
.pointer
;
7473 attr
= gfc_expr_attr (e
);
7475 if (allocatable
== 0 && attr
.pointer
== 0 && !unlimited
)
7478 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7484 if (gfc_is_coindexed (e
))
7486 gfc_error ("Coindexed allocatable object at %L", &e
->where
);
7491 && !gfc_check_vardef_context (e
, true, true, false,
7492 _("DEALLOCATE object")))
7494 if (!gfc_check_vardef_context (e
, false, true, false,
7495 _("DEALLOCATE object")))
7502 /* Returns true if the expression e contains a reference to the symbol sym. */
7504 sym_in_expr (gfc_expr
*e
, gfc_symbol
*sym
, int *f ATTRIBUTE_UNUSED
)
7506 if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
== sym
)
7513 gfc_find_sym_in_expr (gfc_symbol
*sym
, gfc_expr
*e
)
7515 return gfc_traverse_expr (e
, sym
, sym_in_expr
, 0);
7519 /* Given the expression node e for an allocatable/pointer of derived type to be
7520 allocated, get the expression node to be initialized afterwards (needed for
7521 derived types with default initializers, and derived types with allocatable
7522 components that need nullification.) */
7525 gfc_expr_to_initialize (gfc_expr
*e
)
7531 result
= gfc_copy_expr (e
);
7533 /* Change the last array reference from AR_ELEMENT to AR_FULL. */
7534 for (ref
= result
->ref
; ref
; ref
= ref
->next
)
7535 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
7537 if (ref
->u
.ar
.dimen
== 0
7538 && ref
->u
.ar
.as
&& ref
->u
.ar
.as
->corank
)
7541 ref
->u
.ar
.type
= AR_FULL
;
7543 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
7544 ref
->u
.ar
.start
[i
] = ref
->u
.ar
.end
[i
] = ref
->u
.ar
.stride
[i
] = NULL
;
7549 gfc_free_shape (&result
->shape
, result
->rank
);
7551 /* Recalculate rank, shape, etc. */
7552 gfc_resolve_expr (result
);
7557 /* If the last ref of an expression is an array ref, return a copy of the
7558 expression with that one removed. Otherwise, a copy of the original
7559 expression. This is used for allocate-expressions and pointer assignment
7560 LHS, where there may be an array specification that needs to be stripped
7561 off when using gfc_check_vardef_context. */
7564 remove_last_array_ref (gfc_expr
* e
)
7569 e2
= gfc_copy_expr (e
);
7570 for (r
= &e2
->ref
; *r
; r
= &(*r
)->next
)
7571 if ((*r
)->type
== REF_ARRAY
&& !(*r
)->next
)
7573 gfc_free_ref_list (*r
);
7582 /* Used in resolve_allocate_expr to check that a allocation-object and
7583 a source-expr are conformable. This does not catch all possible
7584 cases; in particular a runtime checking is needed. */
7587 conformable_arrays (gfc_expr
*e1
, gfc_expr
*e2
)
7590 for (tail
= e2
->ref
; tail
&& tail
->next
; tail
= tail
->next
);
7592 /* First compare rank. */
7593 if ((tail
&& (!tail
->u
.ar
.as
|| e1
->rank
!= tail
->u
.ar
.as
->rank
))
7594 || (!tail
&& e1
->rank
!= e2
->rank
))
7596 gfc_error ("Source-expr at %L must be scalar or have the "
7597 "same rank as the allocate-object at %L",
7598 &e1
->where
, &e2
->where
);
7609 for (i
= 0; i
< e1
->rank
; i
++)
7611 if (tail
->u
.ar
.start
[i
] == NULL
)
7614 if (tail
->u
.ar
.end
[i
])
7616 mpz_set (s
, tail
->u
.ar
.end
[i
]->value
.integer
);
7617 mpz_sub (s
, s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7618 mpz_add_ui (s
, s
, 1);
7622 mpz_set (s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7625 if (mpz_cmp (e1
->shape
[i
], s
) != 0)
7627 gfc_error ("Source-expr at %L and allocate-object at %L must "
7628 "have the same shape", &e1
->where
, &e2
->where
);
7641 /* Resolve the expression in an ALLOCATE statement, doing the additional
7642 checks to see whether the expression is OK or not. The expression must
7643 have a trailing array reference that gives the size of the array. */
7646 resolve_allocate_expr (gfc_expr
*e
, gfc_code
*code
, bool *array_alloc_wo_spec
)
7648 int i
, pointer
, allocatable
, dimension
, is_abstract
;
7652 symbol_attribute attr
;
7653 gfc_ref
*ref
, *ref2
;
7656 gfc_symbol
*sym
= NULL
;
7661 /* Mark the utmost array component as being in allocate to allow DIMEN_STAR
7662 checking of coarrays. */
7663 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7664 if (ref
->next
== NULL
)
7667 if (ref
&& ref
->type
== REF_ARRAY
)
7668 ref
->u
.ar
.in_allocate
= true;
7670 if (!gfc_resolve_expr (e
))
7673 /* Make sure the expression is allocatable or a pointer. If it is
7674 pointer, the next-to-last reference must be a pointer. */
7678 sym
= e
->symtree
->n
.sym
;
7680 /* Check whether ultimate component is abstract and CLASS. */
7683 /* Is the allocate-object unlimited polymorphic? */
7684 unlimited
= UNLIMITED_POLY(e
);
7686 if (e
->expr_type
!= EXPR_VARIABLE
)
7689 attr
= gfc_expr_attr (e
);
7690 pointer
= attr
.pointer
;
7691 dimension
= attr
.dimension
;
7692 codimension
= attr
.codimension
;
7696 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
))
7698 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7699 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7700 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
7701 codimension
= CLASS_DATA (sym
)->attr
.codimension
;
7702 is_abstract
= CLASS_DATA (sym
)->attr
.abstract
;
7706 allocatable
= sym
->attr
.allocatable
;
7707 pointer
= sym
->attr
.pointer
;
7708 dimension
= sym
->attr
.dimension
;
7709 codimension
= sym
->attr
.codimension
;
7714 for (ref
= e
->ref
; ref
; ref2
= ref
, ref
= ref
->next
)
7719 if (ref
->u
.ar
.codimen
> 0)
7722 for (n
= ref
->u
.ar
.dimen
;
7723 n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
7724 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_THIS_IMAGE
)
7731 if (ref
->next
!= NULL
)
7739 gfc_error ("Coindexed allocatable object at %L",
7744 c
= ref
->u
.c
.component
;
7745 if (c
->ts
.type
== BT_CLASS
)
7747 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7748 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7749 dimension
= CLASS_DATA (c
)->attr
.dimension
;
7750 codimension
= CLASS_DATA (c
)->attr
.codimension
;
7751 is_abstract
= CLASS_DATA (c
)->attr
.abstract
;
7755 allocatable
= c
->attr
.allocatable
;
7756 pointer
= c
->attr
.pointer
;
7757 dimension
= c
->attr
.dimension
;
7758 codimension
= c
->attr
.codimension
;
7759 is_abstract
= c
->attr
.abstract
;
7772 /* Check for F08:C628. */
7773 if (allocatable
== 0 && pointer
== 0 && !unlimited
)
7775 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7780 /* Some checks for the SOURCE tag. */
7783 /* Check F03:C631. */
7784 if (!gfc_type_compatible (&e
->ts
, &code
->expr3
->ts
))
7786 gfc_error ("Type of entity at %L is type incompatible with "
7787 "source-expr at %L", &e
->where
, &code
->expr3
->where
);
7791 /* Check F03:C632 and restriction following Note 6.18. */
7792 if (code
->expr3
->rank
> 0 && !conformable_arrays (code
->expr3
, e
))
7795 /* Check F03:C633. */
7796 if (code
->expr3
->ts
.kind
!= e
->ts
.kind
&& !unlimited
)
7798 gfc_error ("The allocate-object at %L and the source-expr at %L "
7799 "shall have the same kind type parameter",
7800 &e
->where
, &code
->expr3
->where
);
7804 /* Check F2008, C642. */
7805 if (code
->expr3
->ts
.type
== BT_DERIVED
7806 && ((codimension
&& gfc_expr_attr (code
->expr3
).lock_comp
)
7807 || (code
->expr3
->ts
.u
.derived
->from_intmod
7808 == INTMOD_ISO_FORTRAN_ENV
7809 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7810 == ISOFORTRAN_LOCK_TYPE
)))
7812 gfc_error ("The source-expr at %L shall neither be of type "
7813 "LOCK_TYPE nor have a LOCK_TYPE component if "
7814 "allocate-object at %L is a coarray",
7815 &code
->expr3
->where
, &e
->where
);
7819 /* Check TS18508, C702/C703. */
7820 if (code
->expr3
->ts
.type
== BT_DERIVED
7821 && ((codimension
&& gfc_expr_attr (code
->expr3
).event_comp
)
7822 || (code
->expr3
->ts
.u
.derived
->from_intmod
7823 == INTMOD_ISO_FORTRAN_ENV
7824 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7825 == ISOFORTRAN_EVENT_TYPE
)))
7827 gfc_error ("The source-expr at %L shall neither be of type "
7828 "EVENT_TYPE nor have a EVENT_TYPE component if "
7829 "allocate-object at %L is a coarray",
7830 &code
->expr3
->where
, &e
->where
);
7835 /* Check F08:C629. */
7836 if (is_abstract
&& code
->ext
.alloc
.ts
.type
== BT_UNKNOWN
7839 gcc_assert (e
->ts
.type
== BT_CLASS
);
7840 gfc_error ("Allocating %s of ABSTRACT base type at %L requires a "
7841 "type-spec or source-expr", sym
->name
, &e
->where
);
7845 /* Check F08:C632. */
7846 if (code
->ext
.alloc
.ts
.type
== BT_CHARACTER
&& !e
->ts
.deferred
7847 && !UNLIMITED_POLY (e
))
7851 if (!e
->ts
.u
.cl
->length
)
7854 cmp
= gfc_dep_compare_expr (e
->ts
.u
.cl
->length
,
7855 code
->ext
.alloc
.ts
.u
.cl
->length
);
7856 if (cmp
== 1 || cmp
== -1 || cmp
== -3)
7858 gfc_error ("Allocating %s at %L with type-spec requires the same "
7859 "character-length parameter as in the declaration",
7860 sym
->name
, &e
->where
);
7865 /* In the variable definition context checks, gfc_expr_attr is used
7866 on the expression. This is fooled by the array specification
7867 present in e, thus we have to eliminate that one temporarily. */
7868 e2
= remove_last_array_ref (e
);
7871 t
= gfc_check_vardef_context (e2
, true, true, false,
7872 _("ALLOCATE object"));
7874 t
= gfc_check_vardef_context (e2
, false, true, false,
7875 _("ALLOCATE object"));
7880 if (e
->ts
.type
== BT_CLASS
&& CLASS_DATA (e
)->attr
.dimension
7881 && !code
->expr3
&& code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7883 /* For class arrays, the initialization with SOURCE is done
7884 using _copy and trans_call. It is convenient to exploit that
7885 when the allocated type is different from the declared type but
7886 no SOURCE exists by setting expr3. */
7887 code
->expr3
= gfc_default_initializer (&code
->ext
.alloc
.ts
);
7889 else if (flag_coarray
!= GFC_FCOARRAY_LIB
&& e
->ts
.type
== BT_DERIVED
7890 && e
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
7891 && e
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
7893 /* We have to zero initialize the integer variable. */
7894 code
->expr3
= gfc_get_int_expr (gfc_default_integer_kind
, &e
->where
, 0);
7897 if (e
->ts
.type
== BT_CLASS
&& !unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7899 /* Make sure the vtab symbol is present when
7900 the module variables are generated. */
7901 gfc_typespec ts
= e
->ts
;
7903 ts
= code
->expr3
->ts
;
7904 else if (code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7905 ts
= code
->ext
.alloc
.ts
;
7907 /* Finding the vtab also publishes the type's symbol. Therefore this
7908 statement is necessary. */
7909 gfc_find_derived_vtab (ts
.u
.derived
);
7911 else if (unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7913 /* Again, make sure the vtab symbol is present when
7914 the module variables are generated. */
7915 gfc_typespec
*ts
= NULL
;
7917 ts
= &code
->expr3
->ts
;
7919 ts
= &code
->ext
.alloc
.ts
;
7923 /* Finding the vtab also publishes the type's symbol. Therefore this
7924 statement is necessary. */
7928 if (dimension
== 0 && codimension
== 0)
7931 /* Make sure the last reference node is an array specification. */
7933 if (!ref2
|| ref2
->type
!= REF_ARRAY
|| ref2
->u
.ar
.type
== AR_FULL
7934 || (dimension
&& ref2
->u
.ar
.dimen
== 0))
7939 if (!gfc_notify_std (GFC_STD_F2008
, "Array specification required "
7940 "in ALLOCATE statement at %L", &e
->where
))
7942 if (code
->expr3
->rank
!= 0)
7943 *array_alloc_wo_spec
= true;
7946 gfc_error ("Array specification or array-valued SOURCE= "
7947 "expression required in ALLOCATE statement at %L",
7954 gfc_error ("Array specification required in ALLOCATE statement "
7955 "at %L", &e
->where
);
7960 /* Make sure that the array section reference makes sense in the
7961 context of an ALLOCATE specification. */
7966 for (i
= ar
->dimen
; i
< ar
->dimen
+ ar
->codimen
; i
++)
7968 switch (ar
->dimen_type
[i
])
7970 case DIMEN_THIS_IMAGE
:
7971 gfc_error ("Coarray specification required in ALLOCATE statement "
7972 "at %L", &e
->where
);
7976 if (ar
->start
[i
] == 0 || ar
->end
[i
] == 0)
7978 /* If ar->stride[i] is NULL, we issued a previous error. */
7979 if (ar
->stride
[i
] == NULL
)
7980 gfc_error ("Bad array specification in ALLOCATE statement "
7981 "at %L", &e
->where
);
7984 else if (gfc_dep_compare_expr (ar
->start
[i
], ar
->end
[i
]) == 1)
7986 gfc_error ("Upper cobound is less than lower cobound at %L",
7987 &ar
->start
[i
]->where
);
7993 if (ar
->start
[i
]->expr_type
== EXPR_CONSTANT
)
7995 gcc_assert (ar
->start
[i
]->ts
.type
== BT_INTEGER
);
7996 if (mpz_cmp_si (ar
->start
[i
]->value
.integer
, 1) < 0)
7998 gfc_error ("Upper cobound is less than lower cobound "
7999 "of 1 at %L", &ar
->start
[i
]->where
);
8009 gfc_error ("Bad array specification in ALLOCATE statement at %L",
8015 for (i
= 0; i
< ar
->dimen
; i
++)
8017 if (ar
->type
== AR_ELEMENT
|| ar
->type
== AR_FULL
)
8020 switch (ar
->dimen_type
[i
])
8026 if (ar
->start
[i
] != NULL
8027 && ar
->end
[i
] != NULL
8028 && ar
->stride
[i
] == NULL
)
8036 case DIMEN_THIS_IMAGE
:
8037 gfc_error ("Bad array specification in ALLOCATE statement at %L",
8043 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8045 sym
= a
->expr
->symtree
->n
.sym
;
8047 /* TODO - check derived type components. */
8048 if (gfc_bt_struct (sym
->ts
.type
) || sym
->ts
.type
== BT_CLASS
)
8051 if ((ar
->start
[i
] != NULL
8052 && gfc_find_sym_in_expr (sym
, ar
->start
[i
]))
8053 || (ar
->end
[i
] != NULL
8054 && gfc_find_sym_in_expr (sym
, ar
->end
[i
])))
8056 gfc_error ("%qs must not appear in the array specification at "
8057 "%L in the same ALLOCATE statement where it is "
8058 "itself allocated", sym
->name
, &ar
->where
);
8064 for (i
= ar
->dimen
; i
< ar
->codimen
+ ar
->dimen
; i
++)
8066 if (ar
->dimen_type
[i
] == DIMEN_ELEMENT
8067 || ar
->dimen_type
[i
] == DIMEN_RANGE
)
8069 if (i
== (ar
->dimen
+ ar
->codimen
- 1))
8071 gfc_error ("Expected '*' in coindex specification in ALLOCATE "
8072 "statement at %L", &e
->where
);
8078 if (ar
->dimen_type
[i
] == DIMEN_STAR
&& i
== (ar
->dimen
+ ar
->codimen
- 1)
8079 && ar
->stride
[i
] == NULL
)
8082 gfc_error ("Bad coarray specification in ALLOCATE statement at %L",
8096 resolve_allocate_deallocate (gfc_code
*code
, const char *fcn
)
8098 gfc_expr
*stat
, *errmsg
, *pe
, *qe
;
8099 gfc_alloc
*a
, *p
, *q
;
8102 errmsg
= code
->expr2
;
8104 /* Check the stat variable. */
8107 gfc_check_vardef_context (stat
, false, false, false,
8108 _("STAT variable"));
8110 if ((stat
->ts
.type
!= BT_INTEGER
8111 && !(stat
->ref
&& (stat
->ref
->type
== REF_ARRAY
8112 || stat
->ref
->type
== REF_COMPONENT
)))
8114 gfc_error ("Stat-variable at %L must be a scalar INTEGER "
8115 "variable", &stat
->where
);
8117 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
8118 if (p
->expr
->symtree
->n
.sym
->name
== stat
->symtree
->n
.sym
->name
)
8120 gfc_ref
*ref1
, *ref2
;
8123 for (ref1
= p
->expr
->ref
, ref2
= stat
->ref
; ref1
&& ref2
;
8124 ref1
= ref1
->next
, ref2
= ref2
->next
)
8126 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
8128 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
8137 gfc_error ("Stat-variable at %L shall not be %sd within "
8138 "the same %s statement", &stat
->where
, fcn
, fcn
);
8144 /* Check the errmsg variable. */
8148 gfc_warning (0, "ERRMSG at %L is useless without a STAT tag",
8151 gfc_check_vardef_context (errmsg
, false, false, false,
8152 _("ERRMSG variable"));
8154 /* F18:R928 alloc-opt is ERRMSG = errmsg-variable
8155 F18:R930 errmsg-variable is scalar-default-char-variable
8156 F18:R906 default-char-variable is variable
8157 F18:C906 default-char-variable shall be default character. */
8158 if ((errmsg
->ts
.type
!= BT_CHARACTER
8160 && (errmsg
->ref
->type
== REF_ARRAY
8161 || errmsg
->ref
->type
== REF_COMPONENT
)))
8163 || errmsg
->ts
.kind
!= gfc_default_character_kind
)
8164 gfc_error ("ERRMSG variable at %L shall be a scalar default CHARACTER "
8165 "variable", &errmsg
->where
);
8167 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
8168 if (p
->expr
->symtree
->n
.sym
->name
== errmsg
->symtree
->n
.sym
->name
)
8170 gfc_ref
*ref1
, *ref2
;
8173 for (ref1
= p
->expr
->ref
, ref2
= errmsg
->ref
; ref1
&& ref2
;
8174 ref1
= ref1
->next
, ref2
= ref2
->next
)
8176 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
8178 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
8187 gfc_error ("Errmsg-variable at %L shall not be %sd within "
8188 "the same %s statement", &errmsg
->where
, fcn
, fcn
);
8194 /* Check that an allocate-object appears only once in the statement. */
8196 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
8199 for (q
= p
->next
; q
; q
= q
->next
)
8202 if (pe
->symtree
->n
.sym
->name
== qe
->symtree
->n
.sym
->name
)
8204 /* This is a potential collision. */
8205 gfc_ref
*pr
= pe
->ref
;
8206 gfc_ref
*qr
= qe
->ref
;
8208 /* Follow the references until
8209 a) They start to differ, in which case there is no error;
8210 you can deallocate a%b and a%c in a single statement
8211 b) Both of them stop, which is an error
8212 c) One of them stops, which is also an error. */
8215 if (pr
== NULL
&& qr
== NULL
)
8217 gfc_error ("Allocate-object at %L also appears at %L",
8218 &pe
->where
, &qe
->where
);
8221 else if (pr
!= NULL
&& qr
== NULL
)
8223 gfc_error ("Allocate-object at %L is subobject of"
8224 " object at %L", &pe
->where
, &qe
->where
);
8227 else if (pr
== NULL
&& qr
!= NULL
)
8229 gfc_error ("Allocate-object at %L is subobject of"
8230 " object at %L", &qe
->where
, &pe
->where
);
8233 /* Here, pr != NULL && qr != NULL */
8234 gcc_assert(pr
->type
== qr
->type
);
8235 if (pr
->type
== REF_ARRAY
)
8237 /* Handle cases like allocate(v(3)%x(3), v(2)%x(3)),
8239 gcc_assert (qr
->type
== REF_ARRAY
);
8241 if (pr
->next
&& qr
->next
)
8244 gfc_array_ref
*par
= &(pr
->u
.ar
);
8245 gfc_array_ref
*qar
= &(qr
->u
.ar
);
8247 for (i
=0; i
<par
->dimen
; i
++)
8249 if ((par
->start
[i
] != NULL
8250 || qar
->start
[i
] != NULL
)
8251 && gfc_dep_compare_expr (par
->start
[i
],
8252 qar
->start
[i
]) != 0)
8259 if (pr
->u
.c
.component
->name
!= qr
->u
.c
.component
->name
)
8272 if (strcmp (fcn
, "ALLOCATE") == 0)
8274 bool arr_alloc_wo_spec
= false;
8276 /* Resolving the expr3 in the loop over all objects to allocate would
8277 execute loop invariant code for each loop item. Therefore do it just
8279 if (code
->expr3
&& code
->expr3
->mold
8280 && code
->expr3
->ts
.type
== BT_DERIVED
)
8282 /* Default initialization via MOLD (non-polymorphic). */
8283 gfc_expr
*rhs
= gfc_default_initializer (&code
->expr3
->ts
);
8286 gfc_resolve_expr (rhs
);
8287 gfc_free_expr (code
->expr3
);
8291 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8292 resolve_allocate_expr (a
->expr
, code
, &arr_alloc_wo_spec
);
8294 if (arr_alloc_wo_spec
&& code
->expr3
)
8296 /* Mark the allocate to have to take the array specification
8298 code
->ext
.alloc
.arr_spec_from_expr3
= 1;
8303 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8304 resolve_deallocate_expr (a
->expr
);
8309 /************ SELECT CASE resolution subroutines ************/
8311 /* Callback function for our mergesort variant. Determines interval
8312 overlaps for CASEs. Return <0 if op1 < op2, 0 for overlap, >0 for
8313 op1 > op2. Assumes we're not dealing with the default case.
8314 We have op1 = (:L), (K:L) or (K:) and op2 = (:N), (M:N) or (M:).
8315 There are nine situations to check. */
8318 compare_cases (const gfc_case
*op1
, const gfc_case
*op2
)
8322 if (op1
->low
== NULL
) /* op1 = (:L) */
8324 /* op2 = (:N), so overlap. */
8326 /* op2 = (M:) or (M:N), L < M */
8327 if (op2
->low
!= NULL
8328 && gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8331 else if (op1
->high
== NULL
) /* op1 = (K:) */
8333 /* op2 = (M:), so overlap. */
8335 /* op2 = (:N) or (M:N), K > N */
8336 if (op2
->high
!= NULL
8337 && gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8340 else /* op1 = (K:L) */
8342 if (op2
->low
== NULL
) /* op2 = (:N), K > N */
8343 retval
= (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8345 else if (op2
->high
== NULL
) /* op2 = (M:), L < M */
8346 retval
= (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8348 else /* op2 = (M:N) */
8352 if (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8355 else if (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8364 /* Merge-sort a double linked case list, detecting overlap in the
8365 process. LIST is the head of the double linked case list before it
8366 is sorted. Returns the head of the sorted list if we don't see any
8367 overlap, or NULL otherwise. */
8370 check_case_overlap (gfc_case
*list
)
8372 gfc_case
*p
, *q
, *e
, *tail
;
8373 int insize
, nmerges
, psize
, qsize
, cmp
, overlap_seen
;
8375 /* If the passed list was empty, return immediately. */
8382 /* Loop unconditionally. The only exit from this loop is a return
8383 statement, when we've finished sorting the case list. */
8390 /* Count the number of merges we do in this pass. */
8393 /* Loop while there exists a merge to be done. */
8398 /* Count this merge. */
8401 /* Cut the list in two pieces by stepping INSIZE places
8402 forward in the list, starting from P. */
8405 for (i
= 0; i
< insize
; i
++)
8414 /* Now we have two lists. Merge them! */
8415 while (psize
> 0 || (qsize
> 0 && q
!= NULL
))
8417 /* See from which the next case to merge comes from. */
8420 /* P is empty so the next case must come from Q. */
8425 else if (qsize
== 0 || q
== NULL
)
8434 cmp
= compare_cases (p
, q
);
8437 /* The whole case range for P is less than the
8445 /* The whole case range for Q is greater than
8446 the case range for P. */
8453 /* The cases overlap, or they are the same
8454 element in the list. Either way, we must
8455 issue an error and get the next case from P. */
8456 /* FIXME: Sort P and Q by line number. */
8457 gfc_error ("CASE label at %L overlaps with CASE "
8458 "label at %L", &p
->where
, &q
->where
);
8466 /* Add the next element to the merged list. */
8475 /* P has now stepped INSIZE places along, and so has Q. So
8476 they're the same. */
8481 /* If we have done only one merge or none at all, we've
8482 finished sorting the cases. */
8491 /* Otherwise repeat, merging lists twice the size. */
8497 /* Check to see if an expression is suitable for use in a CASE statement.
8498 Makes sure that all case expressions are scalar constants of the same
8499 type. Return false if anything is wrong. */
8502 validate_case_label_expr (gfc_expr
*e
, gfc_expr
*case_expr
)
8504 if (e
== NULL
) return true;
8506 if (e
->ts
.type
!= case_expr
->ts
.type
)
8508 gfc_error ("Expression in CASE statement at %L must be of type %s",
8509 &e
->where
, gfc_basic_typename (case_expr
->ts
.type
));
8513 /* C805 (R808) For a given case-construct, each case-value shall be of
8514 the same type as case-expr. For character type, length differences
8515 are allowed, but the kind type parameters shall be the same. */
8517 if (case_expr
->ts
.type
== BT_CHARACTER
&& e
->ts
.kind
!= case_expr
->ts
.kind
)
8519 gfc_error ("Expression in CASE statement at %L must be of kind %d",
8520 &e
->where
, case_expr
->ts
.kind
);
8524 /* Convert the case value kind to that of case expression kind,
8527 if (e
->ts
.kind
!= case_expr
->ts
.kind
)
8528 gfc_convert_type_warn (e
, &case_expr
->ts
, 2, 0);
8532 gfc_error ("Expression in CASE statement at %L must be scalar",
8541 /* Given a completely parsed select statement, we:
8543 - Validate all expressions and code within the SELECT.
8544 - Make sure that the selection expression is not of the wrong type.
8545 - Make sure that no case ranges overlap.
8546 - Eliminate unreachable cases and unreachable code resulting from
8547 removing case labels.
8549 The standard does allow unreachable cases, e.g. CASE (5:3). But
8550 they are a hassle for code generation, and to prevent that, we just
8551 cut them out here. This is not necessary for overlapping cases
8552 because they are illegal and we never even try to generate code.
8554 We have the additional caveat that a SELECT construct could have
8555 been a computed GOTO in the source code. Fortunately we can fairly
8556 easily work around that here: The case_expr for a "real" SELECT CASE
8557 is in code->expr1, but for a computed GOTO it is in code->expr2. All
8558 we have to do is make sure that the case_expr is a scalar integer
8562 resolve_select (gfc_code
*code
, bool select_type
)
8565 gfc_expr
*case_expr
;
8566 gfc_case
*cp
, *default_case
, *tail
, *head
;
8567 int seen_unreachable
;
8573 if (code
->expr1
== NULL
)
8575 /* This was actually a computed GOTO statement. */
8576 case_expr
= code
->expr2
;
8577 if (case_expr
->ts
.type
!= BT_INTEGER
|| case_expr
->rank
!= 0)
8578 gfc_error ("Selection expression in computed GOTO statement "
8579 "at %L must be a scalar integer expression",
8582 /* Further checking is not necessary because this SELECT was built
8583 by the compiler, so it should always be OK. Just move the
8584 case_expr from expr2 to expr so that we can handle computed
8585 GOTOs as normal SELECTs from here on. */
8586 code
->expr1
= code
->expr2
;
8591 case_expr
= code
->expr1
;
8592 type
= case_expr
->ts
.type
;
8595 if (type
!= BT_LOGICAL
&& type
!= BT_INTEGER
&& type
!= BT_CHARACTER
)
8597 gfc_error ("Argument of SELECT statement at %L cannot be %s",
8598 &case_expr
->where
, gfc_typename (case_expr
));
8600 /* Punt. Going on here just produce more garbage error messages. */
8605 if (!select_type
&& case_expr
->rank
!= 0)
8607 gfc_error ("Argument of SELECT statement at %L must be a scalar "
8608 "expression", &case_expr
->where
);
8614 /* Raise a warning if an INTEGER case value exceeds the range of
8615 the case-expr. Later, all expressions will be promoted to the
8616 largest kind of all case-labels. */
8618 if (type
== BT_INTEGER
)
8619 for (body
= code
->block
; body
; body
= body
->block
)
8620 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8623 && gfc_check_integer_range (cp
->low
->value
.integer
,
8624 case_expr
->ts
.kind
) != ARITH_OK
)
8625 gfc_warning (0, "Expression in CASE statement at %L is "
8626 "not in the range of %s", &cp
->low
->where
,
8627 gfc_typename (case_expr
));
8630 && cp
->low
!= cp
->high
8631 && gfc_check_integer_range (cp
->high
->value
.integer
,
8632 case_expr
->ts
.kind
) != ARITH_OK
)
8633 gfc_warning (0, "Expression in CASE statement at %L is "
8634 "not in the range of %s", &cp
->high
->where
,
8635 gfc_typename (case_expr
));
8638 /* PR 19168 has a long discussion concerning a mismatch of the kinds
8639 of the SELECT CASE expression and its CASE values. Walk the lists
8640 of case values, and if we find a mismatch, promote case_expr to
8641 the appropriate kind. */
8643 if (type
== BT_LOGICAL
|| type
== BT_INTEGER
)
8645 for (body
= code
->block
; body
; body
= body
->block
)
8647 /* Walk the case label list. */
8648 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8650 /* Intercept the DEFAULT case. It does not have a kind. */
8651 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8654 /* Unreachable case ranges are discarded, so ignore. */
8655 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8656 && cp
->low
!= cp
->high
8657 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8661 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->low
))
8662 gfc_convert_type_warn (case_expr
, &cp
->low
->ts
, 2, 0);
8664 if (cp
->high
!= NULL
8665 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->high
))
8666 gfc_convert_type_warn (case_expr
, &cp
->high
->ts
, 2, 0);
8671 /* Assume there is no DEFAULT case. */
8672 default_case
= NULL
;
8677 for (body
= code
->block
; body
; body
= body
->block
)
8679 /* Assume the CASE list is OK, and all CASE labels can be matched. */
8681 seen_unreachable
= 0;
8683 /* Walk the case label list, making sure that all case labels
8685 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8687 /* Count the number of cases in the whole construct. */
8690 /* Intercept the DEFAULT case. */
8691 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8693 if (default_case
!= NULL
)
8695 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8696 "by a second DEFAULT CASE at %L",
8697 &default_case
->where
, &cp
->where
);
8708 /* Deal with single value cases and case ranges. Errors are
8709 issued from the validation function. */
8710 if (!validate_case_label_expr (cp
->low
, case_expr
)
8711 || !validate_case_label_expr (cp
->high
, case_expr
))
8717 if (type
== BT_LOGICAL
8718 && ((cp
->low
== NULL
|| cp
->high
== NULL
)
8719 || cp
->low
!= cp
->high
))
8721 gfc_error ("Logical range in CASE statement at %L is not "
8722 "allowed", &cp
->low
->where
);
8727 if (type
== BT_LOGICAL
&& cp
->low
->expr_type
== EXPR_CONSTANT
)
8730 value
= cp
->low
->value
.logical
== 0 ? 2 : 1;
8731 if (value
& seen_logical
)
8733 gfc_error ("Constant logical value in CASE statement "
8734 "is repeated at %L",
8739 seen_logical
|= value
;
8742 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8743 && cp
->low
!= cp
->high
8744 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8746 if (warn_surprising
)
8747 gfc_warning (OPT_Wsurprising
,
8748 "Range specification at %L can never be matched",
8751 cp
->unreachable
= 1;
8752 seen_unreachable
= 1;
8756 /* If the case range can be matched, it can also overlap with
8757 other cases. To make sure it does not, we put it in a
8758 double linked list here. We sort that with a merge sort
8759 later on to detect any overlapping cases. */
8763 head
->right
= head
->left
= NULL
;
8768 tail
->right
->left
= tail
;
8775 /* It there was a failure in the previous case label, give up
8776 for this case label list. Continue with the next block. */
8780 /* See if any case labels that are unreachable have been seen.
8781 If so, we eliminate them. This is a bit of a kludge because
8782 the case lists for a single case statement (label) is a
8783 single forward linked lists. */
8784 if (seen_unreachable
)
8786 /* Advance until the first case in the list is reachable. */
8787 while (body
->ext
.block
.case_list
!= NULL
8788 && body
->ext
.block
.case_list
->unreachable
)
8790 gfc_case
*n
= body
->ext
.block
.case_list
;
8791 body
->ext
.block
.case_list
= body
->ext
.block
.case_list
->next
;
8793 gfc_free_case_list (n
);
8796 /* Strip all other unreachable cases. */
8797 if (body
->ext
.block
.case_list
)
8799 for (cp
= body
->ext
.block
.case_list
; cp
&& cp
->next
; cp
= cp
->next
)
8801 if (cp
->next
->unreachable
)
8803 gfc_case
*n
= cp
->next
;
8804 cp
->next
= cp
->next
->next
;
8806 gfc_free_case_list (n
);
8813 /* See if there were overlapping cases. If the check returns NULL,
8814 there was overlap. In that case we don't do anything. If head
8815 is non-NULL, we prepend the DEFAULT case. The sorted list can
8816 then used during code generation for SELECT CASE constructs with
8817 a case expression of a CHARACTER type. */
8820 head
= check_case_overlap (head
);
8822 /* Prepend the default_case if it is there. */
8823 if (head
!= NULL
&& default_case
)
8825 default_case
->left
= NULL
;
8826 default_case
->right
= head
;
8827 head
->left
= default_case
;
8831 /* Eliminate dead blocks that may be the result if we've seen
8832 unreachable case labels for a block. */
8833 for (body
= code
; body
&& body
->block
; body
= body
->block
)
8835 if (body
->block
->ext
.block
.case_list
== NULL
)
8837 /* Cut the unreachable block from the code chain. */
8838 gfc_code
*c
= body
->block
;
8839 body
->block
= c
->block
;
8841 /* Kill the dead block, but not the blocks below it. */
8843 gfc_free_statements (c
);
8847 /* More than two cases is legal but insane for logical selects.
8848 Issue a warning for it. */
8849 if (warn_surprising
&& type
== BT_LOGICAL
&& ncases
> 2)
8850 gfc_warning (OPT_Wsurprising
,
8851 "Logical SELECT CASE block at %L has more that two cases",
8856 /* Check if a derived type is extensible. */
8859 gfc_type_is_extensible (gfc_symbol
*sym
)
8861 return !(sym
->attr
.is_bind_c
|| sym
->attr
.sequence
8862 || (sym
->attr
.is_class
8863 && sym
->components
->ts
.u
.derived
->attr
.unlimited_polymorphic
));
8868 resolve_types (gfc_namespace
*ns
);
8870 /* Resolve an associate-name: Resolve target and ensure the type-spec is
8871 correct as well as possibly the array-spec. */
8874 resolve_assoc_var (gfc_symbol
* sym
, bool resolve_target
)
8878 gcc_assert (sym
->assoc
);
8879 gcc_assert (sym
->attr
.flavor
== FL_VARIABLE
);
8881 /* If this is for SELECT TYPE, the target may not yet be set. In that
8882 case, return. Resolution will be called later manually again when
8884 target
= sym
->assoc
->target
;
8887 gcc_assert (!sym
->assoc
->dangling
);
8889 if (resolve_target
&& !gfc_resolve_expr (target
))
8892 /* For variable targets, we get some attributes from the target. */
8893 if (target
->expr_type
== EXPR_VARIABLE
)
8895 gfc_symbol
*tsym
, *dsym
;
8897 gcc_assert (target
->symtree
);
8898 tsym
= target
->symtree
->n
.sym
;
8900 if (gfc_expr_attr (target
).proc_pointer
)
8902 gfc_error ("Associating entity %qs at %L is a procedure pointer",
8903 tsym
->name
, &target
->where
);
8907 if (tsym
->attr
.flavor
== FL_PROCEDURE
&& tsym
->generic
8908 && (dsym
= gfc_find_dt_in_generic (tsym
)) != NULL
8909 && dsym
->attr
.flavor
== FL_DERIVED
)
8911 gfc_error ("Derived type %qs cannot be used as a variable at %L",
8912 tsym
->name
, &target
->where
);
8916 if (tsym
->attr
.flavor
== FL_PROCEDURE
)
8918 bool is_error
= true;
8919 if (tsym
->attr
.function
&& tsym
->result
== tsym
)
8920 for (gfc_namespace
*ns
= sym
->ns
; ns
; ns
= ns
->parent
)
8921 if (tsym
== ns
->proc_name
)
8928 gfc_error ("Associating entity %qs at %L is a procedure name",
8929 tsym
->name
, &target
->where
);
8934 sym
->attr
.asynchronous
= tsym
->attr
.asynchronous
;
8935 sym
->attr
.volatile_
= tsym
->attr
.volatile_
;
8937 sym
->attr
.target
= tsym
->attr
.target
8938 || gfc_expr_attr (target
).pointer
;
8939 if (is_subref_array (target
))
8940 sym
->attr
.subref_array_pointer
= 1;
8942 else if (target
->ts
.type
== BT_PROCEDURE
)
8944 gfc_error ("Associating selector-expression at %L yields a procedure",
8949 if (target
->expr_type
== EXPR_NULL
)
8951 gfc_error ("Selector at %L cannot be NULL()", &target
->where
);
8954 else if (target
->ts
.type
== BT_UNKNOWN
)
8956 gfc_error ("Selector at %L has no type", &target
->where
);
8960 /* Get type if this was not already set. Note that it can be
8961 some other type than the target in case this is a SELECT TYPE
8962 selector! So we must not update when the type is already there. */
8963 if (sym
->ts
.type
== BT_UNKNOWN
)
8964 sym
->ts
= target
->ts
;
8966 gcc_assert (sym
->ts
.type
!= BT_UNKNOWN
);
8968 /* See if this is a valid association-to-variable. */
8969 sym
->assoc
->variable
= (target
->expr_type
== EXPR_VARIABLE
8970 && !gfc_has_vector_subscript (target
));
8972 /* Finally resolve if this is an array or not. */
8973 if (sym
->attr
.dimension
&& target
->rank
== 0)
8975 /* primary.c makes the assumption that a reference to an associate
8976 name followed by a left parenthesis is an array reference. */
8977 if (sym
->ts
.type
!= BT_CHARACTER
)
8978 gfc_error ("Associate-name %qs at %L is used as array",
8979 sym
->name
, &sym
->declared_at
);
8980 sym
->attr
.dimension
= 0;
8985 /* We cannot deal with class selectors that need temporaries. */
8986 if (target
->ts
.type
== BT_CLASS
8987 && gfc_ref_needs_temporary_p (target
->ref
))
8989 gfc_error ("CLASS selector at %L needs a temporary which is not "
8990 "yet implemented", &target
->where
);
8994 if (target
->ts
.type
== BT_CLASS
)
8995 gfc_fix_class_refs (target
);
8997 if (target
->rank
!= 0 && !sym
->attr
.select_rank_temporary
)
9000 /* The rank may be incorrectly guessed at parsing, therefore make sure
9001 it is corrected now. */
9002 if (sym
->ts
.type
!= BT_CLASS
&& (!sym
->as
|| sym
->assoc
->rankguessed
))
9005 sym
->as
= gfc_get_array_spec ();
9007 as
->rank
= target
->rank
;
9008 as
->type
= AS_DEFERRED
;
9009 as
->corank
= gfc_get_corank (target
);
9010 sym
->attr
.dimension
= 1;
9011 if (as
->corank
!= 0)
9012 sym
->attr
.codimension
= 1;
9014 else if (sym
->ts
.type
== BT_CLASS
&& (!CLASS_DATA (sym
)->as
|| sym
->assoc
->rankguessed
))
9016 if (!CLASS_DATA (sym
)->as
)
9017 CLASS_DATA (sym
)->as
= gfc_get_array_spec ();
9018 as
= CLASS_DATA (sym
)->as
;
9019 as
->rank
= target
->rank
;
9020 as
->type
= AS_DEFERRED
;
9021 as
->corank
= gfc_get_corank (target
);
9022 CLASS_DATA (sym
)->attr
.dimension
= 1;
9023 if (as
->corank
!= 0)
9024 CLASS_DATA (sym
)->attr
.codimension
= 1;
9027 else if (!sym
->attr
.select_rank_temporary
)
9029 /* target's rank is 0, but the type of the sym is still array valued,
9030 which has to be corrected. */
9031 if (sym
->ts
.type
== BT_CLASS
9032 && CLASS_DATA (sym
) && CLASS_DATA (sym
)->as
)
9035 symbol_attribute attr
;
9036 /* The associated variable's type is still the array type
9037 correct this now. */
9038 gfc_typespec
*ts
= &target
->ts
;
9041 for (ref
= target
->ref
; ref
!= NULL
; ref
= ref
->next
)
9046 ts
= &ref
->u
.c
.component
->ts
;
9049 if (ts
->type
== BT_CLASS
)
9050 ts
= &ts
->u
.derived
->components
->ts
;
9056 /* Create a scalar instance of the current class type. Because the
9057 rank of a class array goes into its name, the type has to be
9058 rebuild. The alternative of (re-)setting just the attributes
9059 and as in the current type, destroys the type also in other
9063 sym
->ts
.type
= BT_CLASS
;
9064 attr
= CLASS_DATA (sym
) ? CLASS_DATA (sym
)->attr
: sym
->attr
;
9066 attr
.associate_var
= 1;
9067 attr
.dimension
= attr
.codimension
= 0;
9068 attr
.class_pointer
= 1;
9069 if (!gfc_build_class_symbol (&sym
->ts
, &attr
, &as
))
9071 /* Make sure the _vptr is set. */
9072 c
= gfc_find_component (sym
->ts
.u
.derived
, "_vptr", true, true, NULL
);
9073 if (c
->ts
.u
.derived
== NULL
)
9074 c
->ts
.u
.derived
= gfc_find_derived_vtab (sym
->ts
.u
.derived
);
9075 CLASS_DATA (sym
)->attr
.pointer
= 1;
9076 CLASS_DATA (sym
)->attr
.class_pointer
= 1;
9077 gfc_set_sym_referenced (sym
->ts
.u
.derived
);
9078 gfc_commit_symbol (sym
->ts
.u
.derived
);
9079 /* _vptr now has the _vtab in it, change it to the _vtype. */
9080 if (c
->ts
.u
.derived
->attr
.vtab
)
9081 c
->ts
.u
.derived
= c
->ts
.u
.derived
->ts
.u
.derived
;
9082 c
->ts
.u
.derived
->ns
->types_resolved
= 0;
9083 resolve_types (c
->ts
.u
.derived
->ns
);
9087 /* Mark this as an associate variable. */
9088 sym
->attr
.associate_var
= 1;
9090 /* Fix up the type-spec for CHARACTER types. */
9091 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.select_type_temporary
)
9094 sym
->ts
.u
.cl
= target
->ts
.u
.cl
;
9096 if (sym
->ts
.deferred
&& target
->expr_type
== EXPR_VARIABLE
9097 && target
->symtree
->n
.sym
->attr
.dummy
9098 && sym
->ts
.u
.cl
== target
->ts
.u
.cl
)
9100 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
9101 sym
->ts
.deferred
= 1;
9104 if (!sym
->ts
.u
.cl
->length
9105 && !sym
->ts
.deferred
9106 && target
->expr_type
== EXPR_CONSTANT
)
9108 sym
->ts
.u
.cl
->length
=
9109 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
9110 target
->value
.character
.length
);
9112 else if ((!sym
->ts
.u
.cl
->length
9113 || sym
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
)
9114 && target
->expr_type
!= EXPR_VARIABLE
)
9116 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
9117 sym
->ts
.deferred
= 1;
9119 /* This is reset in trans-stmt.c after the assignment
9120 of the target expression to the associate name. */
9121 sym
->attr
.allocatable
= 1;
9125 /* If the target is a good class object, so is the associate variable. */
9126 if (sym
->ts
.type
== BT_CLASS
&& gfc_expr_attr (target
).class_ok
)
9127 sym
->attr
.class_ok
= 1;
9131 /* Ensure that SELECT TYPE expressions have the correct rank and a full
9132 array reference, where necessary. The symbols are artificial and so
9133 the dimension attribute and arrayspec can also be set. In addition,
9134 sometimes the expr1 arrives as BT_DERIVED, when the symbol is BT_CLASS.
9135 This is corrected here as well.*/
9138 fixup_array_ref (gfc_expr
**expr1
, gfc_expr
*expr2
,
9139 int rank
, gfc_ref
*ref
)
9141 gfc_ref
*nref
= (*expr1
)->ref
;
9142 gfc_symbol
*sym1
= (*expr1
)->symtree
->n
.sym
;
9143 gfc_symbol
*sym2
= expr2
? expr2
->symtree
->n
.sym
: NULL
;
9144 (*expr1
)->rank
= rank
;
9145 if (sym1
->ts
.type
== BT_CLASS
)
9147 if ((*expr1
)->ts
.type
!= BT_CLASS
)
9148 (*expr1
)->ts
= sym1
->ts
;
9150 CLASS_DATA (sym1
)->attr
.dimension
= 1;
9151 if (CLASS_DATA (sym1
)->as
== NULL
&& sym2
)
9152 CLASS_DATA (sym1
)->as
9153 = gfc_copy_array_spec (CLASS_DATA (sym2
)->as
);
9157 sym1
->attr
.dimension
= 1;
9158 if (sym1
->as
== NULL
&& sym2
)
9159 sym1
->as
= gfc_copy_array_spec (sym2
->as
);
9162 for (; nref
; nref
= nref
->next
)
9163 if (nref
->next
== NULL
)
9166 if (ref
&& nref
&& nref
->type
!= REF_ARRAY
)
9167 nref
->next
= gfc_copy_ref (ref
);
9168 else if (ref
&& !nref
)
9169 (*expr1
)->ref
= gfc_copy_ref (ref
);
9174 build_loc_call (gfc_expr
*sym_expr
)
9177 loc_call
= gfc_get_expr ();
9178 loc_call
->expr_type
= EXPR_FUNCTION
;
9179 gfc_get_sym_tree ("_loc", gfc_current_ns
, &loc_call
->symtree
, false);
9180 loc_call
->symtree
->n
.sym
->attr
.flavor
= FL_PROCEDURE
;
9181 loc_call
->symtree
->n
.sym
->attr
.intrinsic
= 1;
9182 loc_call
->symtree
->n
.sym
->result
= loc_call
->symtree
->n
.sym
;
9183 gfc_commit_symbol (loc_call
->symtree
->n
.sym
);
9184 loc_call
->ts
.type
= BT_INTEGER
;
9185 loc_call
->ts
.kind
= gfc_index_integer_kind
;
9186 loc_call
->value
.function
.isym
= gfc_intrinsic_function_by_id (GFC_ISYM_LOC
);
9187 loc_call
->value
.function
.actual
= gfc_get_actual_arglist ();
9188 loc_call
->value
.function
.actual
->expr
= sym_expr
;
9189 loc_call
->where
= sym_expr
->where
;
9193 /* Resolve a SELECT TYPE statement. */
9196 resolve_select_type (gfc_code
*code
, gfc_namespace
*old_ns
)
9198 gfc_symbol
*selector_type
;
9199 gfc_code
*body
, *new_st
, *if_st
, *tail
;
9200 gfc_code
*class_is
= NULL
, *default_case
= NULL
;
9203 char name
[GFC_MAX_SYMBOL_LEN
];
9207 gfc_ref
* ref
= NULL
;
9208 gfc_expr
*selector_expr
= NULL
;
9210 ns
= code
->ext
.block
.ns
;
9213 /* Check for F03:C813. */
9214 if (code
->expr1
->ts
.type
!= BT_CLASS
9215 && !(code
->expr2
&& code
->expr2
->ts
.type
== BT_CLASS
))
9217 gfc_error ("Selector shall be polymorphic in SELECT TYPE statement "
9218 "at %L", &code
->loc
);
9222 if (!code
->expr1
->symtree
->n
.sym
->attr
.class_ok
)
9227 gfc_ref
*ref2
= NULL
;
9228 for (ref
= code
->expr2
->ref
; ref
!= NULL
; ref
= ref
->next
)
9229 if (ref
->type
== REF_COMPONENT
9230 && ref
->u
.c
.component
->ts
.type
== BT_CLASS
)
9235 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
9236 code
->expr1
->symtree
->n
.sym
->ts
= ref2
->u
.c
.component
->ts
;
9237 selector_type
= CLASS_DATA (ref2
->u
.c
.component
)->ts
.u
.derived
;
9241 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
9242 code
->expr1
->symtree
->n
.sym
->ts
= code
->expr2
->ts
;
9243 selector_type
= CLASS_DATA (code
->expr2
)->ts
.u
.derived
;
9246 if (code
->expr2
->rank
&& CLASS_DATA (code
->expr1
)->as
)
9247 CLASS_DATA (code
->expr1
)->as
->rank
= code
->expr2
->rank
;
9249 /* F2008: C803 The selector expression must not be coindexed. */
9250 if (gfc_is_coindexed (code
->expr2
))
9252 gfc_error ("Selector at %L must not be coindexed",
9253 &code
->expr2
->where
);
9260 selector_type
= CLASS_DATA (code
->expr1
)->ts
.u
.derived
;
9262 if (gfc_is_coindexed (code
->expr1
))
9264 gfc_error ("Selector at %L must not be coindexed",
9265 &code
->expr1
->where
);
9270 /* Loop over TYPE IS / CLASS IS cases. */
9271 for (body
= code
->block
; body
; body
= body
->block
)
9273 c
= body
->ext
.block
.case_list
;
9277 /* Check for repeated cases. */
9278 for (tail
= code
->block
; tail
; tail
= tail
->block
)
9280 gfc_case
*d
= tail
->ext
.block
.case_list
;
9284 if (c
->ts
.type
== d
->ts
.type
9285 && ((c
->ts
.type
== BT_DERIVED
9286 && c
->ts
.u
.derived
&& d
->ts
.u
.derived
9287 && !strcmp (c
->ts
.u
.derived
->name
,
9288 d
->ts
.u
.derived
->name
))
9289 || c
->ts
.type
== BT_UNKNOWN
9290 || (!(c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9291 && c
->ts
.kind
== d
->ts
.kind
)))
9293 gfc_error ("TYPE IS at %L overlaps with TYPE IS at %L",
9294 &c
->where
, &d
->where
);
9300 /* Check F03:C815. */
9301 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9302 && !selector_type
->attr
.unlimited_polymorphic
9303 && !gfc_type_is_extensible (c
->ts
.u
.derived
))
9305 gfc_error ("Derived type %qs at %L must be extensible",
9306 c
->ts
.u
.derived
->name
, &c
->where
);
9311 /* Check F03:C816. */
9312 if (c
->ts
.type
!= BT_UNKNOWN
&& !selector_type
->attr
.unlimited_polymorphic
9313 && ((c
->ts
.type
!= BT_DERIVED
&& c
->ts
.type
!= BT_CLASS
)
9314 || !gfc_type_is_extension_of (selector_type
, c
->ts
.u
.derived
)))
9316 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9317 gfc_error ("Derived type %qs at %L must be an extension of %qs",
9318 c
->ts
.u
.derived
->name
, &c
->where
, selector_type
->name
);
9320 gfc_error ("Unexpected intrinsic type %qs at %L",
9321 gfc_basic_typename (c
->ts
.type
), &c
->where
);
9326 /* Check F03:C814. */
9327 if (c
->ts
.type
== BT_CHARACTER
9328 && (c
->ts
.u
.cl
->length
!= NULL
|| c
->ts
.deferred
))
9330 gfc_error ("The type-spec at %L shall specify that each length "
9331 "type parameter is assumed", &c
->where
);
9336 /* Intercept the DEFAULT case. */
9337 if (c
->ts
.type
== BT_UNKNOWN
)
9339 /* Check F03:C818. */
9342 gfc_error ("The DEFAULT CASE at %L cannot be followed "
9343 "by a second DEFAULT CASE at %L",
9344 &default_case
->ext
.block
.case_list
->where
, &c
->where
);
9349 default_case
= body
;
9356 /* Transform SELECT TYPE statement to BLOCK and associate selector to
9357 target if present. If there are any EXIT statements referring to the
9358 SELECT TYPE construct, this is no problem because the gfc_code
9359 reference stays the same and EXIT is equally possible from the BLOCK
9360 it is changed to. */
9361 code
->op
= EXEC_BLOCK
;
9364 gfc_association_list
* assoc
;
9366 assoc
= gfc_get_association_list ();
9367 assoc
->st
= code
->expr1
->symtree
;
9368 assoc
->target
= gfc_copy_expr (code
->expr2
);
9369 assoc
->target
->where
= code
->expr2
->where
;
9370 /* assoc->variable will be set by resolve_assoc_var. */
9372 code
->ext
.block
.assoc
= assoc
;
9373 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
9375 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
9378 code
->ext
.block
.assoc
= NULL
;
9380 /* Ensure that the selector rank and arrayspec are available to
9381 correct expressions in which they might be missing. */
9382 if (code
->expr2
&& code
->expr2
->rank
)
9384 rank
= code
->expr2
->rank
;
9385 for (ref
= code
->expr2
->ref
; ref
; ref
= ref
->next
)
9386 if (ref
->next
== NULL
)
9388 if (ref
&& ref
->type
== REF_ARRAY
)
9389 ref
= gfc_copy_ref (ref
);
9391 /* Fixup expr1 if necessary. */
9393 fixup_array_ref (&code
->expr1
, code
->expr2
, rank
, ref
);
9395 else if (code
->expr1
->rank
)
9397 rank
= code
->expr1
->rank
;
9398 for (ref
= code
->expr1
->ref
; ref
; ref
= ref
->next
)
9399 if (ref
->next
== NULL
)
9401 if (ref
&& ref
->type
== REF_ARRAY
)
9402 ref
= gfc_copy_ref (ref
);
9405 /* Add EXEC_SELECT to switch on type. */
9406 new_st
= gfc_get_code (code
->op
);
9407 new_st
->expr1
= code
->expr1
;
9408 new_st
->expr2
= code
->expr2
;
9409 new_st
->block
= code
->block
;
9410 code
->expr1
= code
->expr2
= NULL
;
9415 ns
->code
->next
= new_st
;
9417 code
->op
= EXEC_SELECT_TYPE
;
9419 /* Use the intrinsic LOC function to generate an integer expression
9420 for the vtable of the selector. Note that the rank of the selector
9421 expression has to be set to zero. */
9422 gfc_add_vptr_component (code
->expr1
);
9423 code
->expr1
->rank
= 0;
9424 code
->expr1
= build_loc_call (code
->expr1
);
9425 selector_expr
= code
->expr1
->value
.function
.actual
->expr
;
9427 /* Loop over TYPE IS / CLASS IS cases. */
9428 for (body
= code
->block
; body
; body
= body
->block
)
9432 c
= body
->ext
.block
.case_list
;
9434 /* Generate an index integer expression for address of the
9435 TYPE/CLASS vtable and store it in c->low. The hash expression
9436 is stored in c->high and is used to resolve intrinsic cases. */
9437 if (c
->ts
.type
!= BT_UNKNOWN
)
9439 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9441 vtab
= gfc_find_derived_vtab (c
->ts
.u
.derived
);
9443 c
->high
= gfc_get_int_expr (gfc_integer_4_kind
, NULL
,
9444 c
->ts
.u
.derived
->hash_value
);
9448 vtab
= gfc_find_vtab (&c
->ts
);
9449 gcc_assert (vtab
&& CLASS_DATA (vtab
)->initializer
);
9450 e
= CLASS_DATA (vtab
)->initializer
;
9451 c
->high
= gfc_copy_expr (e
);
9452 if (c
->high
->ts
.kind
!= gfc_integer_4_kind
)
9455 ts
.kind
= gfc_integer_4_kind
;
9456 ts
.type
= BT_INTEGER
;
9457 gfc_convert_type_warn (c
->high
, &ts
, 2, 0);
9461 e
= gfc_lval_expr_from_sym (vtab
);
9462 c
->low
= build_loc_call (e
);
9467 /* Associate temporary to selector. This should only be done
9468 when this case is actually true, so build a new ASSOCIATE
9469 that does precisely this here (instead of using the
9472 if (c
->ts
.type
== BT_CLASS
)
9473 sprintf (name
, "__tmp_class_%s", c
->ts
.u
.derived
->name
);
9474 else if (c
->ts
.type
== BT_DERIVED
)
9475 sprintf (name
, "__tmp_type_%s", c
->ts
.u
.derived
->name
);
9476 else if (c
->ts
.type
== BT_CHARACTER
)
9478 HOST_WIDE_INT charlen
= 0;
9479 if (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9480 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9481 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9482 snprintf (name
, sizeof (name
),
9483 "__tmp_%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9484 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9487 sprintf (name
, "__tmp_%s_%d", gfc_basic_typename (c
->ts
.type
),
9490 st
= gfc_find_symtree (ns
->sym_root
, name
);
9491 gcc_assert (st
->n
.sym
->assoc
);
9492 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9493 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9494 if (c
->ts
.type
!= BT_CLASS
&& c
->ts
.type
!= BT_UNKNOWN
)
9496 gfc_add_data_component (st
->n
.sym
->assoc
->target
);
9497 /* Fixup the target expression if necessary. */
9499 fixup_array_ref (&st
->n
.sym
->assoc
->target
, NULL
, rank
, ref
);
9502 new_st
= gfc_get_code (EXEC_BLOCK
);
9503 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9504 new_st
->ext
.block
.ns
->code
= body
->next
;
9505 body
->next
= new_st
;
9507 /* Chain in the new list only if it is marked as dangling. Otherwise
9508 there is a CASE label overlap and this is already used. Just ignore,
9509 the error is diagnosed elsewhere. */
9510 if (st
->n
.sym
->assoc
->dangling
)
9512 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9513 st
->n
.sym
->assoc
->dangling
= 0;
9516 resolve_assoc_var (st
->n
.sym
, false);
9519 /* Take out CLASS IS cases for separate treatment. */
9521 while (body
&& body
->block
)
9523 if (body
->block
->ext
.block
.case_list
->ts
.type
== BT_CLASS
)
9525 /* Add to class_is list. */
9526 if (class_is
== NULL
)
9528 class_is
= body
->block
;
9533 for (tail
= class_is
; tail
->block
; tail
= tail
->block
) ;
9534 tail
->block
= body
->block
;
9537 /* Remove from EXEC_SELECT list. */
9538 body
->block
= body
->block
->block
;
9551 /* Add a default case to hold the CLASS IS cases. */
9552 for (tail
= code
; tail
->block
; tail
= tail
->block
) ;
9553 tail
->block
= gfc_get_code (EXEC_SELECT_TYPE
);
9555 tail
->ext
.block
.case_list
= gfc_get_case ();
9556 tail
->ext
.block
.case_list
->ts
.type
= BT_UNKNOWN
;
9558 default_case
= tail
;
9561 /* More than one CLASS IS block? */
9562 if (class_is
->block
)
9566 /* Sort CLASS IS blocks by extension level. */
9570 for (c1
= &class_is
; (*c1
) && (*c1
)->block
; c1
= &((*c1
)->block
))
9573 /* F03:C817 (check for doubles). */
9574 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->hash_value
9575 == c2
->ext
.block
.case_list
->ts
.u
.derived
->hash_value
)
9577 gfc_error ("Double CLASS IS block in SELECT TYPE "
9579 &c2
->ext
.block
.case_list
->where
);
9582 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
9583 < c2
->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
)
9586 (*c1
)->block
= c2
->block
;
9596 /* Generate IF chain. */
9597 if_st
= gfc_get_code (EXEC_IF
);
9599 for (body
= class_is
; body
; body
= body
->block
)
9601 new_st
->block
= gfc_get_code (EXEC_IF
);
9602 new_st
= new_st
->block
;
9603 /* Set up IF condition: Call _gfortran_is_extension_of. */
9604 new_st
->expr1
= gfc_get_expr ();
9605 new_st
->expr1
->expr_type
= EXPR_FUNCTION
;
9606 new_st
->expr1
->ts
.type
= BT_LOGICAL
;
9607 new_st
->expr1
->ts
.kind
= 4;
9608 new_st
->expr1
->value
.function
.name
= gfc_get_string (PREFIX ("is_extension_of"));
9609 new_st
->expr1
->value
.function
.isym
= XCNEW (gfc_intrinsic_sym
);
9610 new_st
->expr1
->value
.function
.isym
->id
= GFC_ISYM_EXTENDS_TYPE_OF
;
9611 /* Set up arguments. */
9612 new_st
->expr1
->value
.function
.actual
= gfc_get_actual_arglist ();
9613 new_st
->expr1
->value
.function
.actual
->expr
= gfc_get_variable_expr (selector_expr
->symtree
);
9614 new_st
->expr1
->value
.function
.actual
->expr
->where
= code
->loc
;
9615 new_st
->expr1
->where
= code
->loc
;
9616 gfc_add_vptr_component (new_st
->expr1
->value
.function
.actual
->expr
);
9617 vtab
= gfc_find_derived_vtab (body
->ext
.block
.case_list
->ts
.u
.derived
);
9618 st
= gfc_find_symtree (vtab
->ns
->sym_root
, vtab
->name
);
9619 new_st
->expr1
->value
.function
.actual
->next
= gfc_get_actual_arglist ();
9620 new_st
->expr1
->value
.function
.actual
->next
->expr
= gfc_get_variable_expr (st
);
9621 new_st
->expr1
->value
.function
.actual
->next
->expr
->where
= code
->loc
;
9622 new_st
->next
= body
->next
;
9624 if (default_case
->next
)
9626 new_st
->block
= gfc_get_code (EXEC_IF
);
9627 new_st
= new_st
->block
;
9628 new_st
->next
= default_case
->next
;
9631 /* Replace CLASS DEFAULT code by the IF chain. */
9632 default_case
->next
= if_st
;
9635 /* Resolve the internal code. This cannot be done earlier because
9636 it requires that the sym->assoc of selectors is set already. */
9637 gfc_current_ns
= ns
;
9638 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9639 gfc_current_ns
= old_ns
;
9646 /* Resolve a SELECT RANK statement. */
9649 resolve_select_rank (gfc_code
*code
, gfc_namespace
*old_ns
)
9652 gfc_code
*body
, *new_st
, *tail
;
9654 char tname
[GFC_MAX_SYMBOL_LEN
+ 7];
9655 char name
[2 * GFC_MAX_SYMBOL_LEN
];
9657 gfc_expr
*selector_expr
= NULL
;
9659 HOST_WIDE_INT charlen
= 0;
9661 ns
= code
->ext
.block
.ns
;
9664 code
->op
= EXEC_BLOCK
;
9667 gfc_association_list
* assoc
;
9669 assoc
= gfc_get_association_list ();
9670 assoc
->st
= code
->expr1
->symtree
;
9671 assoc
->target
= gfc_copy_expr (code
->expr2
);
9672 assoc
->target
->where
= code
->expr2
->where
;
9673 /* assoc->variable will be set by resolve_assoc_var. */
9675 code
->ext
.block
.assoc
= assoc
;
9676 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
9678 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
9681 code
->ext
.block
.assoc
= NULL
;
9683 /* Loop over RANK cases. Note that returning on the errors causes a
9684 cascade of further errors because the case blocks do not compile
9686 for (body
= code
->block
; body
; body
= body
->block
)
9688 c
= body
->ext
.block
.case_list
;
9690 case_value
= (int) mpz_get_si (c
->low
->value
.integer
);
9694 /* Check for repeated cases. */
9695 for (tail
= code
->block
; tail
; tail
= tail
->block
)
9697 gfc_case
*d
= tail
->ext
.block
.case_list
;
9703 /* Check F2018: C1153. */
9704 if (!c
->low
&& !d
->low
)
9705 gfc_error ("RANK DEFAULT at %L is repeated at %L",
9706 &c
->where
, &d
->where
);
9708 if (!c
->low
|| !d
->low
)
9711 /* Check F2018: C1153. */
9712 case_value2
= (int) mpz_get_si (d
->low
->value
.integer
);
9713 if ((case_value
== case_value2
) && case_value
== -1)
9714 gfc_error ("RANK (*) at %L is repeated at %L",
9715 &c
->where
, &d
->where
);
9716 else if (case_value
== case_value2
)
9717 gfc_error ("RANK (%i) at %L is repeated at %L",
9718 case_value
, &c
->where
, &d
->where
);
9724 /* Check F2018: C1155. */
9725 if (case_value
== -1 && (gfc_expr_attr (code
->expr1
).allocatable
9726 || gfc_expr_attr (code
->expr1
).pointer
))
9727 gfc_error ("RANK (*) at %L cannot be used with the pointer or "
9728 "allocatable selector at %L", &c
->where
, &code
->expr1
->where
);
9730 if (case_value
== -1 && (gfc_expr_attr (code
->expr1
).allocatable
9731 || gfc_expr_attr (code
->expr1
).pointer
))
9732 gfc_error ("RANK (*) at %L cannot be used with the pointer or "
9733 "allocatable selector at %L", &c
->where
, &code
->expr1
->where
);
9736 /* Add EXEC_SELECT to switch on rank. */
9737 new_st
= gfc_get_code (code
->op
);
9738 new_st
->expr1
= code
->expr1
;
9739 new_st
->expr2
= code
->expr2
;
9740 new_st
->block
= code
->block
;
9741 code
->expr1
= code
->expr2
= NULL
;
9746 ns
->code
->next
= new_st
;
9748 code
->op
= EXEC_SELECT_RANK
;
9750 selector_expr
= code
->expr1
;
9752 /* Loop over SELECT RANK cases. */
9753 for (body
= code
->block
; body
; body
= body
->block
)
9755 c
= body
->ext
.block
.case_list
;
9758 /* Pass on the default case. */
9762 /* Associate temporary to selector. This should only be done
9763 when this case is actually true, so build a new ASSOCIATE
9764 that does precisely this here (instead of using the
9766 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9767 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9768 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9770 if (c
->ts
.type
== BT_CLASS
)
9771 sprintf (tname
, "class_%s", c
->ts
.u
.derived
->name
);
9772 else if (c
->ts
.type
== BT_DERIVED
)
9773 sprintf (tname
, "type_%s", c
->ts
.u
.derived
->name
);
9774 else if (c
->ts
.type
!= BT_CHARACTER
)
9775 sprintf (tname
, "%s_%d", gfc_basic_typename (c
->ts
.type
), c
->ts
.kind
);
9777 sprintf (tname
, "%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9778 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9780 case_value
= (int) mpz_get_si (c
->low
->value
.integer
);
9781 if (case_value
>= 0)
9782 sprintf (name
, "__tmp_%s_rank_%d", tname
, case_value
);
9784 sprintf (name
, "__tmp_%s_rank_m%d", tname
, -case_value
);
9786 st
= gfc_find_symtree (ns
->sym_root
, name
);
9787 gcc_assert (st
->n
.sym
->assoc
);
9789 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9790 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9792 new_st
= gfc_get_code (EXEC_BLOCK
);
9793 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9794 new_st
->ext
.block
.ns
->code
= body
->next
;
9795 body
->next
= new_st
;
9797 /* Chain in the new list only if it is marked as dangling. Otherwise
9798 there is a CASE label overlap and this is already used. Just ignore,
9799 the error is diagnosed elsewhere. */
9800 if (st
->n
.sym
->assoc
->dangling
)
9802 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9803 st
->n
.sym
->assoc
->dangling
= 0;
9806 resolve_assoc_var (st
->n
.sym
, false);
9809 gfc_current_ns
= ns
;
9810 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9811 gfc_current_ns
= old_ns
;
9815 /* Resolve a transfer statement. This is making sure that:
9816 -- a derived type being transferred has only non-pointer components
9817 -- a derived type being transferred doesn't have private components, unless
9818 it's being transferred from the module where the type was defined
9819 -- we're not trying to transfer a whole assumed size array. */
9822 resolve_transfer (gfc_code
*code
)
9824 gfc_symbol
*sym
, *derived
;
9828 bool formatted
= false;
9829 gfc_dt
*dt
= code
->ext
.dt
;
9830 gfc_symbol
*dtio_sub
= NULL
;
9834 while (exp
!= NULL
&& exp
->expr_type
== EXPR_OP
9835 && exp
->value
.op
.op
== INTRINSIC_PARENTHESES
)
9836 exp
= exp
->value
.op
.op1
;
9838 if (exp
&& exp
->expr_type
== EXPR_NULL
9841 gfc_error ("Invalid context for NULL () intrinsic at %L",
9846 if (exp
== NULL
|| (exp
->expr_type
!= EXPR_VARIABLE
9847 && exp
->expr_type
!= EXPR_FUNCTION
9848 && exp
->expr_type
!= EXPR_STRUCTURE
))
9851 /* If we are reading, the variable will be changed. Note that
9852 code->ext.dt may be NULL if the TRANSFER is related to
9853 an INQUIRE statement -- but in this case, we are not reading, either. */
9854 if (dt
&& dt
->dt_io_kind
->value
.iokind
== M_READ
9855 && !gfc_check_vardef_context (exp
, false, false, false,
9859 const gfc_typespec
*ts
= exp
->expr_type
== EXPR_STRUCTURE
9860 || exp
->expr_type
== EXPR_FUNCTION
9861 ? &exp
->ts
: &exp
->symtree
->n
.sym
->ts
;
9863 /* Go to actual component transferred. */
9864 for (ref
= exp
->ref
; ref
; ref
= ref
->next
)
9865 if (ref
->type
== REF_COMPONENT
)
9866 ts
= &ref
->u
.c
.component
->ts
;
9868 if (dt
&& dt
->dt_io_kind
->value
.iokind
!= M_INQUIRE
9869 && (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
))
9871 derived
= ts
->u
.derived
;
9873 /* Determine when to use the formatted DTIO procedure. */
9874 if (dt
&& (dt
->format_expr
|| dt
->format_label
))
9877 write
= dt
->dt_io_kind
->value
.iokind
== M_WRITE
9878 || dt
->dt_io_kind
->value
.iokind
== M_PRINT
;
9879 dtio_sub
= gfc_find_specific_dtio_proc (derived
, write
, formatted
);
9881 if (dtio_sub
!= NULL
&& exp
->expr_type
== EXPR_VARIABLE
)
9884 sym
= exp
->symtree
->n
.sym
->ns
->proc_name
;
9885 /* Check to see if this is a nested DTIO call, with the
9886 dummy as the io-list object. */
9887 if (sym
&& sym
== dtio_sub
&& sym
->formal
9888 && sym
->formal
->sym
== exp
->symtree
->n
.sym
9889 && exp
->ref
== NULL
)
9891 if (!sym
->attr
.recursive
)
9893 gfc_error ("DTIO %s procedure at %L must be recursive",
9894 sym
->name
, &sym
->declared_at
);
9901 if (ts
->type
== BT_CLASS
&& dtio_sub
== NULL
)
9903 gfc_error ("Data transfer element at %L cannot be polymorphic unless "
9904 "it is processed by a defined input/output procedure",
9909 if (ts
->type
== BT_DERIVED
)
9911 /* Check that transferred derived type doesn't contain POINTER
9912 components unless it is processed by a defined input/output
9914 if (ts
->u
.derived
->attr
.pointer_comp
&& dtio_sub
== NULL
)
9916 gfc_error ("Data transfer element at %L cannot have POINTER "
9917 "components unless it is processed by a defined "
9918 "input/output procedure", &code
->loc
);
9923 if (ts
->u
.derived
->attr
.proc_pointer_comp
)
9925 gfc_error ("Data transfer element at %L cannot have "
9926 "procedure pointer components", &code
->loc
);
9930 if (ts
->u
.derived
->attr
.alloc_comp
&& dtio_sub
== NULL
)
9932 gfc_error ("Data transfer element at %L cannot have ALLOCATABLE "
9933 "components unless it is processed by a defined "
9934 "input/output procedure", &code
->loc
);
9938 /* C_PTR and C_FUNPTR have private components which means they cannot
9939 be printed. However, if -std=gnu and not -pedantic, allow
9940 the component to be printed to help debugging. */
9941 if (ts
->u
.derived
->ts
.f90_type
== BT_VOID
)
9943 if (!gfc_notify_std (GFC_STD_GNU
, "Data transfer element at %L "
9944 "cannot have PRIVATE components", &code
->loc
))
9947 else if (derived_inaccessible (ts
->u
.derived
) && dtio_sub
== NULL
)
9949 gfc_error ("Data transfer element at %L cannot have "
9950 "PRIVATE components unless it is processed by "
9951 "a defined input/output procedure", &code
->loc
);
9956 if (exp
->expr_type
== EXPR_STRUCTURE
)
9959 sym
= exp
->symtree
->n
.sym
;
9961 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SIZE
&& exp
->ref
9962 && exp
->ref
->type
== REF_ARRAY
&& exp
->ref
->u
.ar
.type
== AR_FULL
)
9964 gfc_error ("Data transfer element at %L cannot be a full reference to "
9965 "an assumed-size array", &code
->loc
);
9971 /*********** Toplevel code resolution subroutines ***********/
9973 /* Find the set of labels that are reachable from this block. We also
9974 record the last statement in each block. */
9977 find_reachable_labels (gfc_code
*block
)
9984 cs_base
->reachable_labels
= bitmap_alloc (&labels_obstack
);
9986 /* Collect labels in this block. We don't keep those corresponding
9987 to END {IF|SELECT}, these are checked in resolve_branch by going
9988 up through the code_stack. */
9989 for (c
= block
; c
; c
= c
->next
)
9991 if (c
->here
&& c
->op
!= EXEC_END_NESTED_BLOCK
)
9992 bitmap_set_bit (cs_base
->reachable_labels
, c
->here
->value
);
9995 /* Merge with labels from parent block. */
9998 gcc_assert (cs_base
->prev
->reachable_labels
);
9999 bitmap_ior_into (cs_base
->reachable_labels
,
10000 cs_base
->prev
->reachable_labels
);
10006 resolve_lock_unlock_event (gfc_code
*code
)
10008 if (code
->expr1
->expr_type
== EXPR_FUNCTION
10009 && code
->expr1
->value
.function
.isym
10010 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
10011 remove_caf_get_intrinsic (code
->expr1
);
10013 if ((code
->op
== EXEC_LOCK
|| code
->op
== EXEC_UNLOCK
)
10014 && (code
->expr1
->ts
.type
!= BT_DERIVED
10015 || code
->expr1
->expr_type
!= EXPR_VARIABLE
10016 || code
->expr1
->ts
.u
.derived
->from_intmod
!= INTMOD_ISO_FORTRAN_ENV
10017 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
!= ISOFORTRAN_LOCK_TYPE
10018 || code
->expr1
->rank
!= 0
10019 || (!gfc_is_coarray (code
->expr1
) &&
10020 !gfc_is_coindexed (code
->expr1
))))
10021 gfc_error ("Lock variable at %L must be a scalar of type LOCK_TYPE",
10022 &code
->expr1
->where
);
10023 else if ((code
->op
== EXEC_EVENT_POST
|| code
->op
== EXEC_EVENT_WAIT
)
10024 && (code
->expr1
->ts
.type
!= BT_DERIVED
10025 || code
->expr1
->expr_type
!= EXPR_VARIABLE
10026 || code
->expr1
->ts
.u
.derived
->from_intmod
10027 != INTMOD_ISO_FORTRAN_ENV
10028 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
10029 != ISOFORTRAN_EVENT_TYPE
10030 || code
->expr1
->rank
!= 0))
10031 gfc_error ("Event variable at %L must be a scalar of type EVENT_TYPE",
10032 &code
->expr1
->where
);
10033 else if (code
->op
== EXEC_EVENT_POST
&& !gfc_is_coarray (code
->expr1
)
10034 && !gfc_is_coindexed (code
->expr1
))
10035 gfc_error ("Event variable argument at %L must be a coarray or coindexed",
10036 &code
->expr1
->where
);
10037 else if (code
->op
== EXEC_EVENT_WAIT
&& !gfc_is_coarray (code
->expr1
))
10038 gfc_error ("Event variable argument at %L must be a coarray but not "
10039 "coindexed", &code
->expr1
->where
);
10043 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
10044 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
10045 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
10046 &code
->expr2
->where
);
10049 && !gfc_check_vardef_context (code
->expr2
, false, false, false,
10050 _("STAT variable")))
10053 /* Check ERRMSG. */
10055 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
10056 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
10057 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
10058 &code
->expr3
->where
);
10061 && !gfc_check_vardef_context (code
->expr3
, false, false, false,
10062 _("ERRMSG variable")))
10065 /* Check for LOCK the ACQUIRED_LOCK. */
10066 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
10067 && (code
->expr4
->ts
.type
!= BT_LOGICAL
|| code
->expr4
->rank
!= 0
10068 || code
->expr4
->expr_type
!= EXPR_VARIABLE
))
10069 gfc_error ("ACQUIRED_LOCK= argument at %L must be a scalar LOGICAL "
10070 "variable", &code
->expr4
->where
);
10072 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
10073 && !gfc_check_vardef_context (code
->expr4
, false, false, false,
10074 _("ACQUIRED_LOCK variable")))
10077 /* Check for EVENT WAIT the UNTIL_COUNT. */
10078 if (code
->op
== EXEC_EVENT_WAIT
&& code
->expr4
)
10080 if (!gfc_resolve_expr (code
->expr4
) || code
->expr4
->ts
.type
!= BT_INTEGER
10081 || code
->expr4
->rank
!= 0)
10082 gfc_error ("UNTIL_COUNT= argument at %L must be a scalar INTEGER "
10083 "expression", &code
->expr4
->where
);
10089 resolve_critical (gfc_code
*code
)
10091 gfc_symtree
*symtree
;
10092 gfc_symbol
*lock_type
;
10093 char name
[GFC_MAX_SYMBOL_LEN
];
10094 static int serial
= 0;
10096 if (flag_coarray
!= GFC_FCOARRAY_LIB
)
10099 symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
10100 GFC_PREFIX ("lock_type"));
10102 lock_type
= symtree
->n
.sym
;
10105 if (gfc_get_sym_tree (GFC_PREFIX ("lock_type"), gfc_current_ns
, &symtree
,
10107 gcc_unreachable ();
10108 lock_type
= symtree
->n
.sym
;
10109 lock_type
->attr
.flavor
= FL_DERIVED
;
10110 lock_type
->attr
.zero_comp
= 1;
10111 lock_type
->from_intmod
= INTMOD_ISO_FORTRAN_ENV
;
10112 lock_type
->intmod_sym_id
= ISOFORTRAN_LOCK_TYPE
;
10115 sprintf(name
, GFC_PREFIX ("lock_var") "%d",serial
++);
10116 if (gfc_get_sym_tree (name
, gfc_current_ns
, &symtree
, false) != 0)
10117 gcc_unreachable ();
10119 code
->resolved_sym
= symtree
->n
.sym
;
10120 symtree
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
10121 symtree
->n
.sym
->attr
.referenced
= 1;
10122 symtree
->n
.sym
->attr
.artificial
= 1;
10123 symtree
->n
.sym
->attr
.codimension
= 1;
10124 symtree
->n
.sym
->ts
.type
= BT_DERIVED
;
10125 symtree
->n
.sym
->ts
.u
.derived
= lock_type
;
10126 symtree
->n
.sym
->as
= gfc_get_array_spec ();
10127 symtree
->n
.sym
->as
->corank
= 1;
10128 symtree
->n
.sym
->as
->type
= AS_EXPLICIT
;
10129 symtree
->n
.sym
->as
->cotype
= AS_EXPLICIT
;
10130 symtree
->n
.sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
,
10132 gfc_commit_symbols();
10137 resolve_sync (gfc_code
*code
)
10139 /* Check imageset. The * case matches expr1 == NULL. */
10142 if (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
> 1)
10143 gfc_error ("Imageset argument at %L must be a scalar or rank-1 "
10144 "INTEGER expression", &code
->expr1
->where
);
10145 if (code
->expr1
->expr_type
== EXPR_CONSTANT
&& code
->expr1
->rank
== 0
10146 && mpz_cmp_si (code
->expr1
->value
.integer
, 1) < 0)
10147 gfc_error ("Imageset argument at %L must between 1 and num_images()",
10148 &code
->expr1
->where
);
10149 else if (code
->expr1
->expr_type
== EXPR_ARRAY
10150 && gfc_simplify_expr (code
->expr1
, 0))
10152 gfc_constructor
*cons
;
10153 cons
= gfc_constructor_first (code
->expr1
->value
.constructor
);
10154 for (; cons
; cons
= gfc_constructor_next (cons
))
10155 if (cons
->expr
->expr_type
== EXPR_CONSTANT
10156 && mpz_cmp_si (cons
->expr
->value
.integer
, 1) < 0)
10157 gfc_error ("Imageset argument at %L must between 1 and "
10158 "num_images()", &cons
->expr
->where
);
10163 gfc_resolve_expr (code
->expr2
);
10165 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
10166 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
10167 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
10168 &code
->expr2
->where
);
10170 /* Check ERRMSG. */
10171 gfc_resolve_expr (code
->expr3
);
10173 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
10174 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
10175 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
10176 &code
->expr3
->where
);
10180 /* Given a branch to a label, see if the branch is conforming.
10181 The code node describes where the branch is located. */
10184 resolve_branch (gfc_st_label
*label
, gfc_code
*code
)
10191 /* Step one: is this a valid branching target? */
10193 if (label
->defined
== ST_LABEL_UNKNOWN
)
10195 gfc_error ("Label %d referenced at %L is never defined", label
->value
,
10200 if (label
->defined
!= ST_LABEL_TARGET
&& label
->defined
!= ST_LABEL_DO_TARGET
)
10202 gfc_error ("Statement at %L is not a valid branch target statement "
10203 "for the branch statement at %L", &label
->where
, &code
->loc
);
10207 /* Step two: make sure this branch is not a branch to itself ;-) */
10209 if (code
->here
== label
)
10212 "Branch at %L may result in an infinite loop", &code
->loc
);
10216 /* Step three: See if the label is in the same block as the
10217 branching statement. The hard work has been done by setting up
10218 the bitmap reachable_labels. */
10220 if (bitmap_bit_p (cs_base
->reachable_labels
, label
->value
))
10222 /* Check now whether there is a CRITICAL construct; if so, check
10223 whether the label is still visible outside of the CRITICAL block,
10224 which is invalid. */
10225 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
10227 if (stack
->current
->op
== EXEC_CRITICAL
10228 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
10229 gfc_error ("GOTO statement at %L leaves CRITICAL construct for "
10230 "label at %L", &code
->loc
, &label
->where
);
10231 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
10232 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
10233 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct "
10234 "for label at %L", &code
->loc
, &label
->where
);
10240 /* Step four: If we haven't found the label in the bitmap, it may
10241 still be the label of the END of the enclosing block, in which
10242 case we find it by going up the code_stack. */
10244 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
10246 if (stack
->current
->next
&& stack
->current
->next
->here
== label
)
10248 if (stack
->current
->op
== EXEC_CRITICAL
)
10250 /* Note: A label at END CRITICAL does not leave the CRITICAL
10251 construct as END CRITICAL is still part of it. */
10252 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
10253 " at %L", &code
->loc
, &label
->where
);
10256 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
)
10258 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct for "
10259 "label at %L", &code
->loc
, &label
->where
);
10266 gcc_assert (stack
->current
->next
->op
== EXEC_END_NESTED_BLOCK
);
10270 /* The label is not in an enclosing block, so illegal. This was
10271 allowed in Fortran 66, so we allow it as extension. No
10272 further checks are necessary in this case. */
10273 gfc_notify_std (GFC_STD_LEGACY
, "Label at %L is not in the same block "
10274 "as the GOTO statement at %L", &label
->where
,
10280 /* Check whether EXPR1 has the same shape as EXPR2. */
10283 resolve_where_shape (gfc_expr
*expr1
, gfc_expr
*expr2
)
10285 mpz_t shape
[GFC_MAX_DIMENSIONS
];
10286 mpz_t shape2
[GFC_MAX_DIMENSIONS
];
10287 bool result
= false;
10290 /* Compare the rank. */
10291 if (expr1
->rank
!= expr2
->rank
)
10294 /* Compare the size of each dimension. */
10295 for (i
=0; i
<expr1
->rank
; i
++)
10297 if (!gfc_array_dimen_size (expr1
, i
, &shape
[i
]))
10300 if (!gfc_array_dimen_size (expr2
, i
, &shape2
[i
]))
10303 if (mpz_cmp (shape
[i
], shape2
[i
]))
10307 /* When either of the two expression is an assumed size array, we
10308 ignore the comparison of dimension sizes. */
10313 gfc_clear_shape (shape
, i
);
10314 gfc_clear_shape (shape2
, i
);
10319 /* Check whether a WHERE assignment target or a WHERE mask expression
10320 has the same shape as the outmost WHERE mask expression. */
10323 resolve_where (gfc_code
*code
, gfc_expr
*mask
)
10327 gfc_expr
*e
= NULL
;
10329 cblock
= code
->block
;
10331 /* Store the first WHERE mask-expr of the WHERE statement or construct.
10332 In case of nested WHERE, only the outmost one is stored. */
10333 if (mask
== NULL
) /* outmost WHERE */
10335 else /* inner WHERE */
10342 /* Check if the mask-expr has a consistent shape with the
10343 outmost WHERE mask-expr. */
10344 if (!resolve_where_shape (cblock
->expr1
, e
))
10345 gfc_error ("WHERE mask at %L has inconsistent shape",
10346 &cblock
->expr1
->where
);
10349 /* the assignment statement of a WHERE statement, or the first
10350 statement in where-body-construct of a WHERE construct */
10351 cnext
= cblock
->next
;
10356 /* WHERE assignment statement */
10359 /* Check shape consistent for WHERE assignment target. */
10360 if (e
&& !resolve_where_shape (cnext
->expr1
, e
))
10361 gfc_error ("WHERE assignment target at %L has "
10362 "inconsistent shape", &cnext
->expr1
->where
);
10366 case EXEC_ASSIGN_CALL
:
10367 resolve_call (cnext
);
10368 if (!cnext
->resolved_sym
->attr
.elemental
)
10369 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
10370 &cnext
->ext
.actual
->expr
->where
);
10373 /* WHERE or WHERE construct is part of a where-body-construct */
10375 resolve_where (cnext
, e
);
10379 gfc_error ("Unsupported statement inside WHERE at %L",
10382 /* the next statement within the same where-body-construct */
10383 cnext
= cnext
->next
;
10385 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
10386 cblock
= cblock
->block
;
10391 /* Resolve assignment in FORALL construct.
10392 NVAR is the number of FORALL index variables, and VAR_EXPR records the
10393 FORALL index variables. */
10396 gfc_resolve_assign_in_forall (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
10400 for (n
= 0; n
< nvar
; n
++)
10402 gfc_symbol
*forall_index
;
10404 forall_index
= var_expr
[n
]->symtree
->n
.sym
;
10406 /* Check whether the assignment target is one of the FORALL index
10408 if ((code
->expr1
->expr_type
== EXPR_VARIABLE
)
10409 && (code
->expr1
->symtree
->n
.sym
== forall_index
))
10410 gfc_error ("Assignment to a FORALL index variable at %L",
10411 &code
->expr1
->where
);
10414 /* If one of the FORALL index variables doesn't appear in the
10415 assignment variable, then there could be a many-to-one
10416 assignment. Emit a warning rather than an error because the
10417 mask could be resolving this problem. */
10418 if (!find_forall_index (code
->expr1
, forall_index
, 0))
10419 gfc_warning (0, "The FORALL with index %qs is not used on the "
10420 "left side of the assignment at %L and so might "
10421 "cause multiple assignment to this object",
10422 var_expr
[n
]->symtree
->name
, &code
->expr1
->where
);
10428 /* Resolve WHERE statement in FORALL construct. */
10431 gfc_resolve_where_code_in_forall (gfc_code
*code
, int nvar
,
10432 gfc_expr
**var_expr
)
10437 cblock
= code
->block
;
10440 /* the assignment statement of a WHERE statement, or the first
10441 statement in where-body-construct of a WHERE construct */
10442 cnext
= cblock
->next
;
10447 /* WHERE assignment statement */
10449 gfc_resolve_assign_in_forall (cnext
, nvar
, var_expr
);
10452 /* WHERE operator assignment statement */
10453 case EXEC_ASSIGN_CALL
:
10454 resolve_call (cnext
);
10455 if (!cnext
->resolved_sym
->attr
.elemental
)
10456 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
10457 &cnext
->ext
.actual
->expr
->where
);
10460 /* WHERE or WHERE construct is part of a where-body-construct */
10462 gfc_resolve_where_code_in_forall (cnext
, nvar
, var_expr
);
10466 gfc_error ("Unsupported statement inside WHERE at %L",
10469 /* the next statement within the same where-body-construct */
10470 cnext
= cnext
->next
;
10472 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
10473 cblock
= cblock
->block
;
10478 /* Traverse the FORALL body to check whether the following errors exist:
10479 1. For assignment, check if a many-to-one assignment happens.
10480 2. For WHERE statement, check the WHERE body to see if there is any
10481 many-to-one assignment. */
10484 gfc_resolve_forall_body (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
10488 c
= code
->block
->next
;
10494 case EXEC_POINTER_ASSIGN
:
10495 gfc_resolve_assign_in_forall (c
, nvar
, var_expr
);
10498 case EXEC_ASSIGN_CALL
:
10502 /* Because the gfc_resolve_blocks() will handle the nested FORALL,
10503 there is no need to handle it here. */
10507 gfc_resolve_where_code_in_forall(c
, nvar
, var_expr
);
10512 /* The next statement in the FORALL body. */
10518 /* Counts the number of iterators needed inside a forall construct, including
10519 nested forall constructs. This is used to allocate the needed memory
10520 in gfc_resolve_forall. */
10523 gfc_count_forall_iterators (gfc_code
*code
)
10525 int max_iters
, sub_iters
, current_iters
;
10526 gfc_forall_iterator
*fa
;
10528 gcc_assert(code
->op
== EXEC_FORALL
);
10532 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10535 code
= code
->block
->next
;
10539 if (code
->op
== EXEC_FORALL
)
10541 sub_iters
= gfc_count_forall_iterators (code
);
10542 if (sub_iters
> max_iters
)
10543 max_iters
= sub_iters
;
10548 return current_iters
+ max_iters
;
10552 /* Given a FORALL construct, first resolve the FORALL iterator, then call
10553 gfc_resolve_forall_body to resolve the FORALL body. */
10556 gfc_resolve_forall (gfc_code
*code
, gfc_namespace
*ns
, int forall_save
)
10558 static gfc_expr
**var_expr
;
10559 static int total_var
= 0;
10560 static int nvar
= 0;
10561 int i
, old_nvar
, tmp
;
10562 gfc_forall_iterator
*fa
;
10566 if (!gfc_notify_std (GFC_STD_F2018_OBS
, "FORALL construct at %L", &code
->loc
))
10569 /* Start to resolve a FORALL construct */
10570 if (forall_save
== 0)
10572 /* Count the total number of FORALL indices in the nested FORALL
10573 construct in order to allocate the VAR_EXPR with proper size. */
10574 total_var
= gfc_count_forall_iterators (code
);
10576 /* Allocate VAR_EXPR with NUMBER_OF_FORALL_INDEX elements. */
10577 var_expr
= XCNEWVEC (gfc_expr
*, total_var
);
10580 /* The information about FORALL iterator, including FORALL indices start, end
10581 and stride. An outer FORALL indice cannot appear in start, end or stride. */
10582 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10584 /* Fortran 20008: C738 (R753). */
10585 if (fa
->var
->ref
&& fa
->var
->ref
->type
== REF_ARRAY
)
10587 gfc_error ("FORALL index-name at %L must be a scalar variable "
10588 "of type integer", &fa
->var
->where
);
10592 /* Check if any outer FORALL index name is the same as the current
10594 for (i
= 0; i
< nvar
; i
++)
10596 if (fa
->var
->symtree
->n
.sym
== var_expr
[i
]->symtree
->n
.sym
)
10597 gfc_error ("An outer FORALL construct already has an index "
10598 "with this name %L", &fa
->var
->where
);
10601 /* Record the current FORALL index. */
10602 var_expr
[nvar
] = gfc_copy_expr (fa
->var
);
10606 /* No memory leak. */
10607 gcc_assert (nvar
<= total_var
);
10610 /* Resolve the FORALL body. */
10611 gfc_resolve_forall_body (code
, nvar
, var_expr
);
10613 /* May call gfc_resolve_forall to resolve the inner FORALL loop. */
10614 gfc_resolve_blocks (code
->block
, ns
);
10618 /* Free only the VAR_EXPRs allocated in this frame. */
10619 for (i
= nvar
; i
< tmp
; i
++)
10620 gfc_free_expr (var_expr
[i
]);
10624 /* We are in the outermost FORALL construct. */
10625 gcc_assert (forall_save
== 0);
10627 /* VAR_EXPR is not needed any more. */
10634 /* Resolve a BLOCK construct statement. */
10637 resolve_block_construct (gfc_code
* code
)
10639 /* Resolve the BLOCK's namespace. */
10640 gfc_resolve (code
->ext
.block
.ns
);
10642 /* For an ASSOCIATE block, the associations (and their targets) are already
10643 resolved during resolve_symbol. */
10647 /* Resolve lists of blocks found in IF, SELECT CASE, WHERE, FORALL, GOTO and
10651 gfc_resolve_blocks (gfc_code
*b
, gfc_namespace
*ns
)
10655 for (; b
; b
= b
->block
)
10657 t
= gfc_resolve_expr (b
->expr1
);
10658 if (!gfc_resolve_expr (b
->expr2
))
10664 if (t
&& b
->expr1
!= NULL
10665 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
!= 0))
10666 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
10672 && b
->expr1
!= NULL
10673 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
== 0))
10674 gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
10679 resolve_branch (b
->label1
, b
);
10683 resolve_block_construct (b
);
10687 case EXEC_SELECT_TYPE
:
10688 case EXEC_SELECT_RANK
:
10691 case EXEC_DO_WHILE
:
10692 case EXEC_DO_CONCURRENT
:
10693 case EXEC_CRITICAL
:
10696 case EXEC_IOLENGTH
:
10700 case EXEC_OMP_ATOMIC
:
10701 case EXEC_OACC_ATOMIC
:
10703 gfc_omp_atomic_op aop
10704 = (gfc_omp_atomic_op
) (b
->ext
.omp_atomic
& GFC_OMP_ATOMIC_MASK
);
10706 /* Verify this before calling gfc_resolve_code, which might
10708 gcc_assert (b
->next
&& b
->next
->op
== EXEC_ASSIGN
);
10709 gcc_assert (((aop
!= GFC_OMP_ATOMIC_CAPTURE
)
10710 && b
->next
->next
== NULL
)
10711 || ((aop
== GFC_OMP_ATOMIC_CAPTURE
)
10712 && b
->next
->next
!= NULL
10713 && b
->next
->next
->op
== EXEC_ASSIGN
10714 && b
->next
->next
->next
== NULL
));
10718 case EXEC_OACC_PARALLEL_LOOP
:
10719 case EXEC_OACC_PARALLEL
:
10720 case EXEC_OACC_KERNELS_LOOP
:
10721 case EXEC_OACC_KERNELS
:
10722 case EXEC_OACC_SERIAL_LOOP
:
10723 case EXEC_OACC_SERIAL
:
10724 case EXEC_OACC_DATA
:
10725 case EXEC_OACC_HOST_DATA
:
10726 case EXEC_OACC_LOOP
:
10727 case EXEC_OACC_UPDATE
:
10728 case EXEC_OACC_WAIT
:
10729 case EXEC_OACC_CACHE
:
10730 case EXEC_OACC_ENTER_DATA
:
10731 case EXEC_OACC_EXIT_DATA
:
10732 case EXEC_OACC_ROUTINE
:
10733 case EXEC_OMP_CRITICAL
:
10734 case EXEC_OMP_DISTRIBUTE
:
10735 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
10736 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
10737 case EXEC_OMP_DISTRIBUTE_SIMD
:
10739 case EXEC_OMP_DO_SIMD
:
10740 case EXEC_OMP_MASTER
:
10741 case EXEC_OMP_ORDERED
:
10742 case EXEC_OMP_PARALLEL
:
10743 case EXEC_OMP_PARALLEL_DO
:
10744 case EXEC_OMP_PARALLEL_DO_SIMD
:
10745 case EXEC_OMP_PARALLEL_SECTIONS
:
10746 case EXEC_OMP_PARALLEL_WORKSHARE
:
10747 case EXEC_OMP_SECTIONS
:
10748 case EXEC_OMP_SIMD
:
10749 case EXEC_OMP_SINGLE
:
10750 case EXEC_OMP_TARGET
:
10751 case EXEC_OMP_TARGET_DATA
:
10752 case EXEC_OMP_TARGET_ENTER_DATA
:
10753 case EXEC_OMP_TARGET_EXIT_DATA
:
10754 case EXEC_OMP_TARGET_PARALLEL
:
10755 case EXEC_OMP_TARGET_PARALLEL_DO
:
10756 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
10757 case EXEC_OMP_TARGET_SIMD
:
10758 case EXEC_OMP_TARGET_TEAMS
:
10759 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
10760 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10761 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10762 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
10763 case EXEC_OMP_TARGET_UPDATE
:
10764 case EXEC_OMP_TASK
:
10765 case EXEC_OMP_TASKGROUP
:
10766 case EXEC_OMP_TASKLOOP
:
10767 case EXEC_OMP_TASKLOOP_SIMD
:
10768 case EXEC_OMP_TASKWAIT
:
10769 case EXEC_OMP_TASKYIELD
:
10770 case EXEC_OMP_TEAMS
:
10771 case EXEC_OMP_TEAMS_DISTRIBUTE
:
10772 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10773 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10774 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
10775 case EXEC_OMP_WORKSHARE
:
10779 gfc_internal_error ("gfc_resolve_blocks(): Bad block type");
10782 gfc_resolve_code (b
->next
, ns
);
10787 /* Does everything to resolve an ordinary assignment. Returns true
10788 if this is an interface assignment. */
10790 resolve_ordinary_assign (gfc_code
*code
, gfc_namespace
*ns
)
10797 symbol_attribute attr
;
10799 if (gfc_extend_assign (code
, ns
))
10803 if (code
->op
== EXEC_ASSIGN_CALL
)
10805 lhs
= code
->ext
.actual
->expr
;
10806 rhsptr
= &code
->ext
.actual
->next
->expr
;
10810 gfc_actual_arglist
* args
;
10811 gfc_typebound_proc
* tbp
;
10813 gcc_assert (code
->op
== EXEC_COMPCALL
);
10815 args
= code
->expr1
->value
.compcall
.actual
;
10817 rhsptr
= &args
->next
->expr
;
10819 tbp
= code
->expr1
->value
.compcall
.tbp
;
10820 gcc_assert (!tbp
->is_generic
);
10823 /* Make a temporary rhs when there is a default initializer
10824 and rhs is the same symbol as the lhs. */
10825 if ((*rhsptr
)->expr_type
== EXPR_VARIABLE
10826 && (*rhsptr
)->symtree
->n
.sym
->ts
.type
== BT_DERIVED
10827 && gfc_has_default_initializer ((*rhsptr
)->symtree
->n
.sym
->ts
.u
.derived
)
10828 && (lhs
->symtree
->n
.sym
== (*rhsptr
)->symtree
->n
.sym
))
10829 *rhsptr
= gfc_get_parentheses (*rhsptr
);
10837 if ((gfc_numeric_ts (&lhs
->ts
) || lhs
->ts
.type
== BT_LOGICAL
)
10838 && rhs
->ts
.type
== BT_CHARACTER
10839 && (rhs
->expr_type
!= EXPR_CONSTANT
|| !flag_dec_char_conversions
))
10841 /* Use of -fdec-char-conversions allows assignment of character data
10842 to non-character variables. This not permited for nonconstant
10844 gfc_error ("Cannot convert %s to %s at %L", gfc_typename (rhs
),
10845 gfc_typename (lhs
), &rhs
->where
);
10849 /* Handle the case of a BOZ literal on the RHS. */
10850 if (rhs
->ts
.type
== BT_BOZ
)
10852 if (gfc_invalid_boz ("BOZ literal constant at %L is neither a DATA "
10853 "statement value nor an actual argument of "
10854 "INT/REAL/DBLE/CMPLX intrinsic subprogram",
10858 switch (lhs
->ts
.type
)
10861 if (!gfc_boz2int (rhs
, lhs
->ts
.kind
))
10865 if (!gfc_boz2real (rhs
, lhs
->ts
.kind
))
10869 gfc_error ("Invalid use of BOZ literal constant at %L", &rhs
->where
);
10874 if (lhs
->ts
.type
== BT_CHARACTER
&& warn_character_truncation
)
10876 HOST_WIDE_INT llen
= 0, rlen
= 0;
10877 if (lhs
->ts
.u
.cl
!= NULL
10878 && lhs
->ts
.u
.cl
->length
!= NULL
10879 && lhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10880 llen
= gfc_mpz_get_hwi (lhs
->ts
.u
.cl
->length
->value
.integer
);
10882 if (rhs
->expr_type
== EXPR_CONSTANT
)
10883 rlen
= rhs
->value
.character
.length
;
10885 else if (rhs
->ts
.u
.cl
!= NULL
10886 && rhs
->ts
.u
.cl
->length
!= NULL
10887 && rhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10888 rlen
= gfc_mpz_get_hwi (rhs
->ts
.u
.cl
->length
->value
.integer
);
10890 if (rlen
&& llen
&& rlen
> llen
)
10891 gfc_warning_now (OPT_Wcharacter_truncation
,
10892 "CHARACTER expression will be truncated "
10893 "in assignment (%ld/%ld) at %L",
10894 (long) llen
, (long) rlen
, &code
->loc
);
10897 /* Ensure that a vector index expression for the lvalue is evaluated
10898 to a temporary if the lvalue symbol is referenced in it. */
10901 for (ref
= lhs
->ref
; ref
; ref
= ref
->next
)
10902 if (ref
->type
== REF_ARRAY
)
10904 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
10905 if (ref
->u
.ar
.dimen_type
[n
] == DIMEN_VECTOR
10906 && gfc_find_sym_in_expr (lhs
->symtree
->n
.sym
,
10907 ref
->u
.ar
.start
[n
]))
10909 = gfc_get_parentheses (ref
->u
.ar
.start
[n
]);
10913 if (gfc_pure (NULL
))
10915 if (lhs
->ts
.type
== BT_DERIVED
10916 && lhs
->expr_type
== EXPR_VARIABLE
10917 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10918 && rhs
->expr_type
== EXPR_VARIABLE
10919 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10920 || gfc_is_coindexed (rhs
)))
10922 /* F2008, C1283. */
10923 if (gfc_is_coindexed (rhs
))
10924 gfc_error ("Coindexed expression at %L is assigned to "
10925 "a derived type variable with a POINTER "
10926 "component in a PURE procedure",
10929 /* F2008, C1283 (4). */
10930 gfc_error ("In a pure subprogram an INTENT(IN) dummy argument "
10931 "shall not be used as the expr at %L of an intrinsic "
10932 "assignment statement in which the variable is of a "
10933 "derived type if the derived type has a pointer "
10934 "component at any level of component selection.",
10939 /* Fortran 2008, C1283. */
10940 if (gfc_is_coindexed (lhs
))
10942 gfc_error ("Assignment to coindexed variable at %L in a PURE "
10943 "procedure", &rhs
->where
);
10948 if (gfc_implicit_pure (NULL
))
10950 if (lhs
->expr_type
== EXPR_VARIABLE
10951 && lhs
->symtree
->n
.sym
!= gfc_current_ns
->proc_name
10952 && lhs
->symtree
->n
.sym
->ns
!= gfc_current_ns
)
10953 gfc_unset_implicit_pure (NULL
);
10955 if (lhs
->ts
.type
== BT_DERIVED
10956 && lhs
->expr_type
== EXPR_VARIABLE
10957 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10958 && rhs
->expr_type
== EXPR_VARIABLE
10959 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10960 || gfc_is_coindexed (rhs
)))
10961 gfc_unset_implicit_pure (NULL
);
10963 /* Fortran 2008, C1283. */
10964 if (gfc_is_coindexed (lhs
))
10965 gfc_unset_implicit_pure (NULL
);
10968 /* F2008, 7.2.1.2. */
10969 attr
= gfc_expr_attr (lhs
);
10970 if (lhs
->ts
.type
== BT_CLASS
&& attr
.allocatable
)
10972 if (attr
.codimension
)
10974 gfc_error ("Assignment to polymorphic coarray at %L is not "
10975 "permitted", &lhs
->where
);
10978 if (!gfc_notify_std (GFC_STD_F2008
, "Assignment to an allocatable "
10979 "polymorphic variable at %L", &lhs
->where
))
10981 if (!flag_realloc_lhs
)
10983 gfc_error ("Assignment to an allocatable polymorphic variable at %L "
10984 "requires %<-frealloc-lhs%>", &lhs
->where
);
10988 else if (lhs
->ts
.type
== BT_CLASS
)
10990 gfc_error ("Nonallocatable variable must not be polymorphic in intrinsic "
10991 "assignment at %L - check that there is a matching specific "
10992 "subroutine for '=' operator", &lhs
->where
);
10996 bool lhs_coindexed
= gfc_is_coindexed (lhs
);
10998 /* F2008, Section 7.2.1.2. */
10999 if (lhs_coindexed
&& gfc_has_ultimate_allocatable (lhs
))
11001 gfc_error ("Coindexed variable must not have an allocatable ultimate "
11002 "component in assignment at %L", &lhs
->where
);
11006 /* Assign the 'data' of a class object to a derived type. */
11007 if (lhs
->ts
.type
== BT_DERIVED
11008 && rhs
->ts
.type
== BT_CLASS
11009 && rhs
->expr_type
!= EXPR_ARRAY
)
11010 gfc_add_data_component (rhs
);
11012 /* Make sure there is a vtable and, in particular, a _copy for the
11014 if (UNLIMITED_POLY (lhs
) && lhs
->rank
&& rhs
->ts
.type
!= BT_CLASS
)
11015 gfc_find_vtab (&rhs
->ts
);
11017 bool caf_convert_to_send
= flag_coarray
== GFC_FCOARRAY_LIB
11019 || (code
->expr2
->expr_type
== EXPR_FUNCTION
11020 && code
->expr2
->value
.function
.isym
11021 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
11022 && (code
->expr1
->rank
== 0 || code
->expr2
->rank
!= 0)
11023 && !gfc_expr_attr (rhs
).allocatable
11024 && !gfc_has_vector_subscript (rhs
)));
11026 gfc_check_assign (lhs
, rhs
, 1, !caf_convert_to_send
);
11028 /* Insert a GFC_ISYM_CAF_SEND intrinsic, when the LHS is a coindexed variable.
11029 Additionally, insert this code when the RHS is a CAF as we then use the
11030 GFC_ISYM_CAF_SEND intrinsic just to avoid a temporary; but do not do so if
11031 the LHS is (re)allocatable or has a vector subscript. If the LHS is a
11032 noncoindexed array and the RHS is a coindexed scalar, use the normal code
11034 if (caf_convert_to_send
)
11036 if (code
->expr2
->expr_type
== EXPR_FUNCTION
11037 && code
->expr2
->value
.function
.isym
11038 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
11039 remove_caf_get_intrinsic (code
->expr2
);
11040 code
->op
= EXEC_CALL
;
11041 gfc_get_sym_tree (GFC_PREFIX ("caf_send"), ns
, &code
->symtree
, true);
11042 code
->resolved_sym
= code
->symtree
->n
.sym
;
11043 code
->resolved_sym
->attr
.flavor
= FL_PROCEDURE
;
11044 code
->resolved_sym
->attr
.intrinsic
= 1;
11045 code
->resolved_sym
->attr
.subroutine
= 1;
11046 code
->resolved_isym
= gfc_intrinsic_subroutine_by_id (GFC_ISYM_CAF_SEND
);
11047 gfc_commit_symbol (code
->resolved_sym
);
11048 code
->ext
.actual
= gfc_get_actual_arglist ();
11049 code
->ext
.actual
->expr
= lhs
;
11050 code
->ext
.actual
->next
= gfc_get_actual_arglist ();
11051 code
->ext
.actual
->next
->expr
= rhs
;
11052 code
->expr1
= NULL
;
11053 code
->expr2
= NULL
;
11060 /* Add a component reference onto an expression. */
11063 add_comp_ref (gfc_expr
*e
, gfc_component
*c
)
11068 ref
= &((*ref
)->next
);
11069 *ref
= gfc_get_ref ();
11070 (*ref
)->type
= REF_COMPONENT
;
11071 (*ref
)->u
.c
.sym
= e
->ts
.u
.derived
;
11072 (*ref
)->u
.c
.component
= c
;
11075 /* Add a full array ref, as necessary. */
11078 gfc_add_full_array_ref (e
, c
->as
);
11079 e
->rank
= c
->as
->rank
;
11084 /* Build an assignment. Keep the argument 'op' for future use, so that
11085 pointer assignments can be made. */
11088 build_assignment (gfc_exec_op op
, gfc_expr
*expr1
, gfc_expr
*expr2
,
11089 gfc_component
*comp1
, gfc_component
*comp2
, locus loc
)
11091 gfc_code
*this_code
;
11093 this_code
= gfc_get_code (op
);
11094 this_code
->next
= NULL
;
11095 this_code
->expr1
= gfc_copy_expr (expr1
);
11096 this_code
->expr2
= gfc_copy_expr (expr2
);
11097 this_code
->loc
= loc
;
11098 if (comp1
&& comp2
)
11100 add_comp_ref (this_code
->expr1
, comp1
);
11101 add_comp_ref (this_code
->expr2
, comp2
);
11108 /* Makes a temporary variable expression based on the characteristics of
11109 a given variable expression. */
11112 get_temp_from_expr (gfc_expr
*e
, gfc_namespace
*ns
)
11114 static int serial
= 0;
11115 char name
[GFC_MAX_SYMBOL_LEN
];
11117 gfc_array_spec
*as
;
11118 gfc_array_ref
*aref
;
11121 sprintf (name
, GFC_PREFIX("DA%d"), serial
++);
11122 gfc_get_sym_tree (name
, ns
, &tmp
, false);
11123 gfc_add_type (tmp
->n
.sym
, &e
->ts
, NULL
);
11125 if (e
->expr_type
== EXPR_CONSTANT
&& e
->ts
.type
== BT_CHARACTER
)
11126 tmp
->n
.sym
->ts
.u
.cl
->length
= gfc_get_int_expr (gfc_charlen_int_kind
,
11128 e
->value
.character
.length
);
11134 /* Obtain the arrayspec for the temporary. */
11135 if (e
->rank
&& e
->expr_type
!= EXPR_ARRAY
11136 && e
->expr_type
!= EXPR_FUNCTION
11137 && e
->expr_type
!= EXPR_OP
)
11139 aref
= gfc_find_array_ref (e
);
11140 if (e
->expr_type
== EXPR_VARIABLE
11141 && e
->symtree
->n
.sym
->as
== aref
->as
)
11145 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
11146 if (ref
->type
== REF_COMPONENT
11147 && ref
->u
.c
.component
->as
== aref
->as
)
11155 /* Add the attributes and the arrayspec to the temporary. */
11156 tmp
->n
.sym
->attr
= gfc_expr_attr (e
);
11157 tmp
->n
.sym
->attr
.function
= 0;
11158 tmp
->n
.sym
->attr
.result
= 0;
11159 tmp
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
11160 tmp
->n
.sym
->attr
.dummy
= 0;
11161 tmp
->n
.sym
->attr
.intent
= INTENT_UNKNOWN
;
11165 tmp
->n
.sym
->as
= gfc_copy_array_spec (as
);
11168 if (as
->type
== AS_DEFERRED
)
11169 tmp
->n
.sym
->attr
.allocatable
= 1;
11171 else if (e
->rank
&& (e
->expr_type
== EXPR_ARRAY
11172 || e
->expr_type
== EXPR_FUNCTION
11173 || e
->expr_type
== EXPR_OP
))
11175 tmp
->n
.sym
->as
= gfc_get_array_spec ();
11176 tmp
->n
.sym
->as
->type
= AS_DEFERRED
;
11177 tmp
->n
.sym
->as
->rank
= e
->rank
;
11178 tmp
->n
.sym
->attr
.allocatable
= 1;
11179 tmp
->n
.sym
->attr
.dimension
= 1;
11182 tmp
->n
.sym
->attr
.dimension
= 0;
11184 gfc_set_sym_referenced (tmp
->n
.sym
);
11185 gfc_commit_symbol (tmp
->n
.sym
);
11186 e
= gfc_lval_expr_from_sym (tmp
->n
.sym
);
11188 /* Should the lhs be a section, use its array ref for the
11189 temporary expression. */
11190 if (aref
&& aref
->type
!= AR_FULL
)
11192 gfc_free_ref_list (e
->ref
);
11193 e
->ref
= gfc_copy_ref (ref
);
11199 /* Add one line of code to the code chain, making sure that 'head' and
11200 'tail' are appropriately updated. */
11203 add_code_to_chain (gfc_code
**this_code
, gfc_code
**head
, gfc_code
**tail
)
11205 gcc_assert (this_code
);
11207 *head
= *tail
= *this_code
;
11209 *tail
= gfc_append_code (*tail
, *this_code
);
11214 /* Counts the potential number of part array references that would
11215 result from resolution of typebound defined assignments. */
11218 nonscalar_typebound_assign (gfc_symbol
*derived
, int depth
)
11221 int c_depth
= 0, t_depth
;
11223 for (c
= derived
->components
; c
; c
= c
->next
)
11225 if ((!gfc_bt_struct (c
->ts
.type
)
11227 || c
->attr
.allocatable
11228 || c
->attr
.proc_pointer_comp
11229 || c
->attr
.class_pointer
11230 || c
->attr
.proc_pointer
)
11231 && !c
->attr
.defined_assign_comp
)
11234 if (c
->as
&& c_depth
== 0)
11237 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
11238 t_depth
= nonscalar_typebound_assign (c
->ts
.u
.derived
,
11243 c_depth
= t_depth
> c_depth
? t_depth
: c_depth
;
11245 return depth
+ c_depth
;
11249 /* Implement 7.2.1.3 of the F08 standard:
11250 "An intrinsic assignment where the variable is of derived type is
11251 performed as if each component of the variable were assigned from the
11252 corresponding component of expr using pointer assignment (7.2.2) for
11253 each pointer component, defined assignment for each nonpointer
11254 nonallocatable component of a type that has a type-bound defined
11255 assignment consistent with the component, intrinsic assignment for
11256 each other nonpointer nonallocatable component, ..."
11258 The pointer assignments are taken care of by the intrinsic
11259 assignment of the structure itself. This function recursively adds
11260 defined assignments where required. The recursion is accomplished
11261 by calling gfc_resolve_code.
11263 When the lhs in a defined assignment has intent INOUT, we need a
11264 temporary for the lhs. In pseudo-code:
11266 ! Only call function lhs once.
11267 if (lhs is not a constant or an variable)
11270 ! Do the intrinsic assignment
11272 ! Now do the defined assignments
11273 do over components with typebound defined assignment [%cmp]
11274 #if one component's assignment procedure is INOUT
11276 #if expr2 non-variable
11282 t1%cmp {defined=} expr2%cmp
11288 expr1%cmp {defined=} expr2%cmp
11292 /* The temporary assignments have to be put on top of the additional
11293 code to avoid the result being changed by the intrinsic assignment.
11295 static int component_assignment_level
= 0;
11296 static gfc_code
*tmp_head
= NULL
, *tmp_tail
= NULL
;
11299 generate_component_assignments (gfc_code
**code
, gfc_namespace
*ns
)
11301 gfc_component
*comp1
, *comp2
;
11302 gfc_code
*this_code
= NULL
, *head
= NULL
, *tail
= NULL
;
11304 int error_count
, depth
;
11306 gfc_get_errors (NULL
, &error_count
);
11308 /* Filter out continuing processing after an error. */
11310 || (*code
)->expr1
->ts
.type
!= BT_DERIVED
11311 || (*code
)->expr2
->ts
.type
!= BT_DERIVED
)
11314 /* TODO: Handle more than one part array reference in assignments. */
11315 depth
= nonscalar_typebound_assign ((*code
)->expr1
->ts
.u
.derived
,
11316 (*code
)->expr1
->rank
? 1 : 0);
11319 gfc_warning (0, "TODO: type-bound defined assignment(s) at %L not "
11320 "done because multiple part array references would "
11321 "occur in intermediate expressions.", &(*code
)->loc
);
11325 component_assignment_level
++;
11327 /* Create a temporary so that functions get called only once. */
11328 if ((*code
)->expr2
->expr_type
!= EXPR_VARIABLE
11329 && (*code
)->expr2
->expr_type
!= EXPR_CONSTANT
)
11331 gfc_expr
*tmp_expr
;
11333 /* Assign the rhs to the temporary. */
11334 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11335 this_code
= build_assignment (EXEC_ASSIGN
,
11336 tmp_expr
, (*code
)->expr2
,
11337 NULL
, NULL
, (*code
)->loc
);
11338 /* Add the code and substitute the rhs expression. */
11339 add_code_to_chain (&this_code
, &tmp_head
, &tmp_tail
);
11340 gfc_free_expr ((*code
)->expr2
);
11341 (*code
)->expr2
= tmp_expr
;
11344 /* Do the intrinsic assignment. This is not needed if the lhs is one
11345 of the temporaries generated here, since the intrinsic assignment
11346 to the final result already does this. */
11347 if ((*code
)->expr1
->symtree
->n
.sym
->name
[2] != '@')
11349 this_code
= build_assignment (EXEC_ASSIGN
,
11350 (*code
)->expr1
, (*code
)->expr2
,
11351 NULL
, NULL
, (*code
)->loc
);
11352 add_code_to_chain (&this_code
, &head
, &tail
);
11355 comp1
= (*code
)->expr1
->ts
.u
.derived
->components
;
11356 comp2
= (*code
)->expr2
->ts
.u
.derived
->components
;
11359 for (; comp1
; comp1
= comp1
->next
, comp2
= comp2
->next
)
11361 bool inout
= false;
11363 /* The intrinsic assignment does the right thing for pointers
11364 of all kinds and allocatable components. */
11365 if (!gfc_bt_struct (comp1
->ts
.type
)
11366 || comp1
->attr
.pointer
11367 || comp1
->attr
.allocatable
11368 || comp1
->attr
.proc_pointer_comp
11369 || comp1
->attr
.class_pointer
11370 || comp1
->attr
.proc_pointer
)
11373 /* Make an assigment for this component. */
11374 this_code
= build_assignment (EXEC_ASSIGN
,
11375 (*code
)->expr1
, (*code
)->expr2
,
11376 comp1
, comp2
, (*code
)->loc
);
11378 /* Convert the assignment if there is a defined assignment for
11379 this type. Otherwise, using the call from gfc_resolve_code,
11380 recurse into its components. */
11381 gfc_resolve_code (this_code
, ns
);
11383 if (this_code
->op
== EXEC_ASSIGN_CALL
)
11385 gfc_formal_arglist
*dummy_args
;
11387 /* Check that there is a typebound defined assignment. If not,
11388 then this must be a module defined assignment. We cannot
11389 use the defined_assign_comp attribute here because it must
11390 be this derived type that has the defined assignment and not
11392 if (!(comp1
->ts
.u
.derived
->f2k_derived
11393 && comp1
->ts
.u
.derived
->f2k_derived
11394 ->tb_op
[INTRINSIC_ASSIGN
]))
11396 gfc_free_statements (this_code
);
11401 /* If the first argument of the subroutine has intent INOUT
11402 a temporary must be generated and used instead. */
11403 rsym
= this_code
->resolved_sym
;
11404 dummy_args
= gfc_sym_get_dummy_args (rsym
);
11406 && dummy_args
->sym
->attr
.intent
== INTENT_INOUT
)
11408 gfc_code
*temp_code
;
11411 /* Build the temporary required for the assignment and put
11412 it at the head of the generated code. */
11415 t1
= get_temp_from_expr ((*code
)->expr1
, ns
);
11416 temp_code
= build_assignment (EXEC_ASSIGN
,
11417 t1
, (*code
)->expr1
,
11418 NULL
, NULL
, (*code
)->loc
);
11420 /* For allocatable LHS, check whether it is allocated. Note
11421 that allocatable components with defined assignment are
11422 not yet support. See PR 57696. */
11423 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
)
11427 gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11428 block
= gfc_get_code (EXEC_IF
);
11429 block
->block
= gfc_get_code (EXEC_IF
);
11430 block
->block
->expr1
11431 = gfc_build_intrinsic_call (ns
,
11432 GFC_ISYM_ALLOCATED
, "allocated",
11433 (*code
)->loc
, 1, e
);
11434 block
->block
->next
= temp_code
;
11437 add_code_to_chain (&temp_code
, &tmp_head
, &tmp_tail
);
11440 /* Replace the first actual arg with the component of the
11442 gfc_free_expr (this_code
->ext
.actual
->expr
);
11443 this_code
->ext
.actual
->expr
= gfc_copy_expr (t1
);
11444 add_comp_ref (this_code
->ext
.actual
->expr
, comp1
);
11446 /* If the LHS variable is allocatable and wasn't allocated and
11447 the temporary is allocatable, pointer assign the address of
11448 the freshly allocated LHS to the temporary. */
11449 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
11450 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11455 cond
= gfc_get_expr ();
11456 cond
->ts
.type
= BT_LOGICAL
;
11457 cond
->ts
.kind
= gfc_default_logical_kind
;
11458 cond
->expr_type
= EXPR_OP
;
11459 cond
->where
= (*code
)->loc
;
11460 cond
->value
.op
.op
= INTRINSIC_NOT
;
11461 cond
->value
.op
.op1
= gfc_build_intrinsic_call (ns
,
11462 GFC_ISYM_ALLOCATED
, "allocated",
11463 (*code
)->loc
, 1, gfc_copy_expr (t1
));
11464 block
= gfc_get_code (EXEC_IF
);
11465 block
->block
= gfc_get_code (EXEC_IF
);
11466 block
->block
->expr1
= cond
;
11467 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11468 t1
, (*code
)->expr1
,
11469 NULL
, NULL
, (*code
)->loc
);
11470 add_code_to_chain (&block
, &head
, &tail
);
11474 else if (this_code
->op
== EXEC_ASSIGN
&& !this_code
->next
)
11476 /* Don't add intrinsic assignments since they are already
11477 effected by the intrinsic assignment of the structure. */
11478 gfc_free_statements (this_code
);
11483 add_code_to_chain (&this_code
, &head
, &tail
);
11487 /* Transfer the value to the final result. */
11488 this_code
= build_assignment (EXEC_ASSIGN
,
11489 (*code
)->expr1
, t1
,
11490 comp1
, comp2
, (*code
)->loc
);
11491 add_code_to_chain (&this_code
, &head
, &tail
);
11495 /* Put the temporary assignments at the top of the generated code. */
11496 if (tmp_head
&& component_assignment_level
== 1)
11498 gfc_append_code (tmp_head
, head
);
11500 tmp_head
= tmp_tail
= NULL
;
11503 // If we did a pointer assignment - thus, we need to ensure that the LHS is
11504 // not accidentally deallocated. Hence, nullify t1.
11505 if (t1
&& (*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
11506 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11512 e
= gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11513 cond
= gfc_build_intrinsic_call (ns
, GFC_ISYM_ASSOCIATED
, "associated",
11514 (*code
)->loc
, 2, gfc_copy_expr (t1
), e
);
11515 block
= gfc_get_code (EXEC_IF
);
11516 block
->block
= gfc_get_code (EXEC_IF
);
11517 block
->block
->expr1
= cond
;
11518 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11519 t1
, gfc_get_null_expr (&(*code
)->loc
),
11520 NULL
, NULL
, (*code
)->loc
);
11521 gfc_append_code (tail
, block
);
11525 /* Now attach the remaining code chain to the input code. Step on
11526 to the end of the new code since resolution is complete. */
11527 gcc_assert ((*code
)->op
== EXEC_ASSIGN
);
11528 tail
->next
= (*code
)->next
;
11529 /* Overwrite 'code' because this would place the intrinsic assignment
11530 before the temporary for the lhs is created. */
11531 gfc_free_expr ((*code
)->expr1
);
11532 gfc_free_expr ((*code
)->expr2
);
11538 component_assignment_level
--;
11542 /* F2008: Pointer function assignments are of the form:
11543 ptr_fcn (args) = expr
11544 This function breaks these assignments into two statements:
11545 temporary_pointer => ptr_fcn(args)
11546 temporary_pointer = expr */
11549 resolve_ptr_fcn_assign (gfc_code
**code
, gfc_namespace
*ns
)
11551 gfc_expr
*tmp_ptr_expr
;
11552 gfc_code
*this_code
;
11553 gfc_component
*comp
;
11556 if ((*code
)->expr1
->expr_type
!= EXPR_FUNCTION
)
11559 /* Even if standard does not support this feature, continue to build
11560 the two statements to avoid upsetting frontend_passes.c. */
11561 gfc_notify_std (GFC_STD_F2008
, "Pointer procedure assignment at "
11562 "%L", &(*code
)->loc
);
11564 comp
= gfc_get_proc_ptr_comp ((*code
)->expr1
);
11567 s
= comp
->ts
.interface
;
11569 s
= (*code
)->expr1
->symtree
->n
.sym
;
11571 if (s
== NULL
|| !s
->result
->attr
.pointer
)
11573 gfc_error ("The function result on the lhs of the assignment at "
11574 "%L must have the pointer attribute.",
11575 &(*code
)->expr1
->where
);
11576 (*code
)->op
= EXEC_NOP
;
11580 tmp_ptr_expr
= get_temp_from_expr ((*code
)->expr2
, ns
);
11582 /* get_temp_from_expression is set up for ordinary assignments. To that
11583 end, where array bounds are not known, arrays are made allocatable.
11584 Change the temporary to a pointer here. */
11585 tmp_ptr_expr
->symtree
->n
.sym
->attr
.pointer
= 1;
11586 tmp_ptr_expr
->symtree
->n
.sym
->attr
.allocatable
= 0;
11587 tmp_ptr_expr
->where
= (*code
)->loc
;
11589 this_code
= build_assignment (EXEC_ASSIGN
,
11590 tmp_ptr_expr
, (*code
)->expr2
,
11591 NULL
, NULL
, (*code
)->loc
);
11592 this_code
->next
= (*code
)->next
;
11593 (*code
)->next
= this_code
;
11594 (*code
)->op
= EXEC_POINTER_ASSIGN
;
11595 (*code
)->expr2
= (*code
)->expr1
;
11596 (*code
)->expr1
= tmp_ptr_expr
;
11602 /* Deferred character length assignments from an operator expression
11603 require a temporary because the character length of the lhs can
11604 change in the course of the assignment. */
11607 deferred_op_assign (gfc_code
**code
, gfc_namespace
*ns
)
11609 gfc_expr
*tmp_expr
;
11610 gfc_code
*this_code
;
11612 if (!((*code
)->expr1
->ts
.type
== BT_CHARACTER
11613 && (*code
)->expr1
->ts
.deferred
&& (*code
)->expr1
->rank
11614 && (*code
)->expr2
->expr_type
== EXPR_OP
))
11617 if (!gfc_check_dependency ((*code
)->expr1
, (*code
)->expr2
, 1))
11620 if (gfc_expr_attr ((*code
)->expr1
).pointer
)
11623 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11624 tmp_expr
->where
= (*code
)->loc
;
11626 /* A new charlen is required to ensure that the variable string
11627 length is different to that of the original lhs. */
11628 tmp_expr
->ts
.u
.cl
= gfc_get_charlen();
11629 tmp_expr
->symtree
->n
.sym
->ts
.u
.cl
= tmp_expr
->ts
.u
.cl
;
11630 tmp_expr
->ts
.u
.cl
->next
= (*code
)->expr2
->ts
.u
.cl
->next
;
11631 (*code
)->expr2
->ts
.u
.cl
->next
= tmp_expr
->ts
.u
.cl
;
11633 tmp_expr
->symtree
->n
.sym
->ts
.deferred
= 1;
11635 this_code
= build_assignment (EXEC_ASSIGN
,
11637 gfc_copy_expr (tmp_expr
),
11638 NULL
, NULL
, (*code
)->loc
);
11640 (*code
)->expr1
= tmp_expr
;
11642 this_code
->next
= (*code
)->next
;
11643 (*code
)->next
= this_code
;
11649 /* Given a block of code, recursively resolve everything pointed to by this
11653 gfc_resolve_code (gfc_code
*code
, gfc_namespace
*ns
)
11655 int omp_workshare_save
;
11656 int forall_save
, do_concurrent_save
;
11660 frame
.prev
= cs_base
;
11664 find_reachable_labels (code
);
11666 for (; code
; code
= code
->next
)
11668 frame
.current
= code
;
11669 forall_save
= forall_flag
;
11670 do_concurrent_save
= gfc_do_concurrent_flag
;
11672 if (code
->op
== EXEC_FORALL
)
11675 gfc_resolve_forall (code
, ns
, forall_save
);
11678 else if (code
->block
)
11680 omp_workshare_save
= -1;
11683 case EXEC_OACC_PARALLEL_LOOP
:
11684 case EXEC_OACC_PARALLEL
:
11685 case EXEC_OACC_KERNELS_LOOP
:
11686 case EXEC_OACC_KERNELS
:
11687 case EXEC_OACC_SERIAL_LOOP
:
11688 case EXEC_OACC_SERIAL
:
11689 case EXEC_OACC_DATA
:
11690 case EXEC_OACC_HOST_DATA
:
11691 case EXEC_OACC_LOOP
:
11692 gfc_resolve_oacc_blocks (code
, ns
);
11694 case EXEC_OMP_PARALLEL_WORKSHARE
:
11695 omp_workshare_save
= omp_workshare_flag
;
11696 omp_workshare_flag
= 1;
11697 gfc_resolve_omp_parallel_blocks (code
, ns
);
11699 case EXEC_OMP_PARALLEL
:
11700 case EXEC_OMP_PARALLEL_DO
:
11701 case EXEC_OMP_PARALLEL_DO_SIMD
:
11702 case EXEC_OMP_PARALLEL_SECTIONS
:
11703 case EXEC_OMP_TARGET_PARALLEL
:
11704 case EXEC_OMP_TARGET_PARALLEL_DO
:
11705 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11706 case EXEC_OMP_TARGET_TEAMS
:
11707 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11708 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11709 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11710 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11711 case EXEC_OMP_TASK
:
11712 case EXEC_OMP_TASKLOOP
:
11713 case EXEC_OMP_TASKLOOP_SIMD
:
11714 case EXEC_OMP_TEAMS
:
11715 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11716 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11717 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11718 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11719 omp_workshare_save
= omp_workshare_flag
;
11720 omp_workshare_flag
= 0;
11721 gfc_resolve_omp_parallel_blocks (code
, ns
);
11723 case EXEC_OMP_DISTRIBUTE
:
11724 case EXEC_OMP_DISTRIBUTE_SIMD
:
11726 case EXEC_OMP_DO_SIMD
:
11727 case EXEC_OMP_SIMD
:
11728 case EXEC_OMP_TARGET_SIMD
:
11729 gfc_resolve_omp_do_blocks (code
, ns
);
11731 case EXEC_SELECT_TYPE
:
11732 /* Blocks are handled in resolve_select_type because we have
11733 to transform the SELECT TYPE into ASSOCIATE first. */
11735 case EXEC_DO_CONCURRENT
:
11736 gfc_do_concurrent_flag
= 1;
11737 gfc_resolve_blocks (code
->block
, ns
);
11738 gfc_do_concurrent_flag
= 2;
11740 case EXEC_OMP_WORKSHARE
:
11741 omp_workshare_save
= omp_workshare_flag
;
11742 omp_workshare_flag
= 1;
11745 gfc_resolve_blocks (code
->block
, ns
);
11749 if (omp_workshare_save
!= -1)
11750 omp_workshare_flag
= omp_workshare_save
;
11754 if (code
->op
!= EXEC_COMPCALL
&& code
->op
!= EXEC_CALL_PPC
)
11755 t
= gfc_resolve_expr (code
->expr1
);
11756 forall_flag
= forall_save
;
11757 gfc_do_concurrent_flag
= do_concurrent_save
;
11759 if (!gfc_resolve_expr (code
->expr2
))
11762 if (code
->op
== EXEC_ALLOCATE
11763 && !gfc_resolve_expr (code
->expr3
))
11769 case EXEC_END_BLOCK
:
11770 case EXEC_END_NESTED_BLOCK
:
11774 case EXEC_ERROR_STOP
:
11776 case EXEC_CONTINUE
:
11778 case EXEC_ASSIGN_CALL
:
11781 case EXEC_CRITICAL
:
11782 resolve_critical (code
);
11785 case EXEC_SYNC_ALL
:
11786 case EXEC_SYNC_IMAGES
:
11787 case EXEC_SYNC_MEMORY
:
11788 resolve_sync (code
);
11793 case EXEC_EVENT_POST
:
11794 case EXEC_EVENT_WAIT
:
11795 resolve_lock_unlock_event (code
);
11798 case EXEC_FAIL_IMAGE
:
11799 case EXEC_FORM_TEAM
:
11800 case EXEC_CHANGE_TEAM
:
11801 case EXEC_END_TEAM
:
11802 case EXEC_SYNC_TEAM
:
11806 /* Keep track of which entry we are up to. */
11807 current_entry_id
= code
->ext
.entry
->id
;
11811 resolve_where (code
, NULL
);
11815 if (code
->expr1
!= NULL
)
11817 if (code
->expr1
->ts
.type
!= BT_INTEGER
)
11818 gfc_error ("ASSIGNED GOTO statement at %L requires an "
11819 "INTEGER variable", &code
->expr1
->where
);
11820 else if (code
->expr1
->symtree
->n
.sym
->attr
.assign
!= 1)
11821 gfc_error ("Variable %qs has not been assigned a target "
11822 "label at %L", code
->expr1
->symtree
->n
.sym
->name
,
11823 &code
->expr1
->where
);
11826 resolve_branch (code
->label1
, code
);
11830 if (code
->expr1
!= NULL
11831 && (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
))
11832 gfc_error ("Alternate RETURN statement at %L requires a SCALAR-"
11833 "INTEGER return specifier", &code
->expr1
->where
);
11836 case EXEC_INIT_ASSIGN
:
11837 case EXEC_END_PROCEDURE
:
11844 /* Remove a GFC_ISYM_CAF_GET inserted for a coindexed variable on
11846 if (code
->expr1
->expr_type
== EXPR_FUNCTION
11847 && code
->expr1
->value
.function
.isym
11848 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
11849 remove_caf_get_intrinsic (code
->expr1
);
11851 /* If this is a pointer function in an lvalue variable context,
11852 the new code will have to be resolved afresh. This is also the
11853 case with an error, where the code is transformed into NOP to
11854 prevent ICEs downstream. */
11855 if (resolve_ptr_fcn_assign (&code
, ns
)
11856 || code
->op
== EXEC_NOP
)
11859 if (!gfc_check_vardef_context (code
->expr1
, false, false, false,
11863 if (resolve_ordinary_assign (code
, ns
))
11865 if (code
->op
== EXEC_COMPCALL
)
11871 /* Check for dependencies in deferred character length array
11872 assignments and generate a temporary, if necessary. */
11873 if (code
->op
== EXEC_ASSIGN
&& deferred_op_assign (&code
, ns
))
11876 /* F03 7.4.1.3 for non-allocatable, non-pointer components. */
11877 if (code
->op
!= EXEC_CALL
&& code
->expr1
->ts
.type
== BT_DERIVED
11878 && code
->expr1
->ts
.u
.derived
11879 && code
->expr1
->ts
.u
.derived
->attr
.defined_assign_comp
)
11880 generate_component_assignments (&code
, ns
);
11884 case EXEC_LABEL_ASSIGN
:
11885 if (code
->label1
->defined
== ST_LABEL_UNKNOWN
)
11886 gfc_error ("Label %d referenced at %L is never defined",
11887 code
->label1
->value
, &code
->label1
->where
);
11889 && (code
->expr1
->expr_type
!= EXPR_VARIABLE
11890 || code
->expr1
->symtree
->n
.sym
->ts
.type
!= BT_INTEGER
11891 || code
->expr1
->symtree
->n
.sym
->ts
.kind
11892 != gfc_default_integer_kind
11893 || code
->expr1
->symtree
->n
.sym
->as
!= NULL
))
11894 gfc_error ("ASSIGN statement at %L requires a scalar "
11895 "default INTEGER variable", &code
->expr1
->where
);
11898 case EXEC_POINTER_ASSIGN
:
11905 /* This is both a variable definition and pointer assignment
11906 context, so check both of them. For rank remapping, a final
11907 array ref may be present on the LHS and fool gfc_expr_attr
11908 used in gfc_check_vardef_context. Remove it. */
11909 e
= remove_last_array_ref (code
->expr1
);
11910 t
= gfc_check_vardef_context (e
, true, false, false,
11911 _("pointer assignment"));
11913 t
= gfc_check_vardef_context (e
, false, false, false,
11914 _("pointer assignment"));
11917 t
= gfc_check_pointer_assign (code
->expr1
, code
->expr2
, !t
) && t
;
11922 /* Assigning a class object always is a regular assign. */
11923 if (code
->expr2
->ts
.type
== BT_CLASS
11924 && code
->expr1
->ts
.type
== BT_CLASS
11925 && !CLASS_DATA (code
->expr2
)->attr
.dimension
11926 && !(gfc_expr_attr (code
->expr1
).proc_pointer
11927 && code
->expr2
->expr_type
== EXPR_VARIABLE
11928 && code
->expr2
->symtree
->n
.sym
->attr
.flavor
11930 code
->op
= EXEC_ASSIGN
;
11934 case EXEC_ARITHMETIC_IF
:
11936 gfc_expr
*e
= code
->expr1
;
11938 gfc_resolve_expr (e
);
11939 if (e
->expr_type
== EXPR_NULL
)
11940 gfc_error ("Invalid NULL at %L", &e
->where
);
11942 if (t
&& (e
->rank
> 0
11943 || !(e
->ts
.type
== BT_REAL
|| e
->ts
.type
== BT_INTEGER
)))
11944 gfc_error ("Arithmetic IF statement at %L requires a scalar "
11945 "REAL or INTEGER expression", &e
->where
);
11947 resolve_branch (code
->label1
, code
);
11948 resolve_branch (code
->label2
, code
);
11949 resolve_branch (code
->label3
, code
);
11954 if (t
&& code
->expr1
!= NULL
11955 && (code
->expr1
->ts
.type
!= BT_LOGICAL
11956 || code
->expr1
->rank
!= 0))
11957 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
11958 &code
->expr1
->where
);
11963 resolve_call (code
);
11966 case EXEC_COMPCALL
:
11968 resolve_typebound_subroutine (code
);
11971 case EXEC_CALL_PPC
:
11972 resolve_ppc_call (code
);
11976 /* Select is complicated. Also, a SELECT construct could be
11977 a transformed computed GOTO. */
11978 resolve_select (code
, false);
11981 case EXEC_SELECT_TYPE
:
11982 resolve_select_type (code
, ns
);
11985 case EXEC_SELECT_RANK
:
11986 resolve_select_rank (code
, ns
);
11990 resolve_block_construct (code
);
11994 if (code
->ext
.iterator
!= NULL
)
11996 gfc_iterator
*iter
= code
->ext
.iterator
;
11997 if (gfc_resolve_iterator (iter
, true, false))
11998 gfc_resolve_do_iterator (code
, iter
->var
->symtree
->n
.sym
,
12003 case EXEC_DO_WHILE
:
12004 if (code
->expr1
== NULL
)
12005 gfc_internal_error ("gfc_resolve_code(): No expression on "
12008 && (code
->expr1
->rank
!= 0
12009 || code
->expr1
->ts
.type
!= BT_LOGICAL
))
12010 gfc_error ("Exit condition of DO WHILE loop at %L must be "
12011 "a scalar LOGICAL expression", &code
->expr1
->where
);
12014 case EXEC_ALLOCATE
:
12016 resolve_allocate_deallocate (code
, "ALLOCATE");
12020 case EXEC_DEALLOCATE
:
12022 resolve_allocate_deallocate (code
, "DEALLOCATE");
12027 if (!gfc_resolve_open (code
->ext
.open
, &code
->loc
))
12030 resolve_branch (code
->ext
.open
->err
, code
);
12034 if (!gfc_resolve_close (code
->ext
.close
, &code
->loc
))
12037 resolve_branch (code
->ext
.close
->err
, code
);
12040 case EXEC_BACKSPACE
:
12044 if (!gfc_resolve_filepos (code
->ext
.filepos
, &code
->loc
))
12047 resolve_branch (code
->ext
.filepos
->err
, code
);
12051 if (!gfc_resolve_inquire (code
->ext
.inquire
))
12054 resolve_branch (code
->ext
.inquire
->err
, code
);
12057 case EXEC_IOLENGTH
:
12058 gcc_assert (code
->ext
.inquire
!= NULL
);
12059 if (!gfc_resolve_inquire (code
->ext
.inquire
))
12062 resolve_branch (code
->ext
.inquire
->err
, code
);
12066 if (!gfc_resolve_wait (code
->ext
.wait
))
12069 resolve_branch (code
->ext
.wait
->err
, code
);
12070 resolve_branch (code
->ext
.wait
->end
, code
);
12071 resolve_branch (code
->ext
.wait
->eor
, code
);
12076 if (!gfc_resolve_dt (code
, code
->ext
.dt
, &code
->loc
))
12079 resolve_branch (code
->ext
.dt
->err
, code
);
12080 resolve_branch (code
->ext
.dt
->end
, code
);
12081 resolve_branch (code
->ext
.dt
->eor
, code
);
12084 case EXEC_TRANSFER
:
12085 resolve_transfer (code
);
12088 case EXEC_DO_CONCURRENT
:
12090 resolve_forall_iterators (code
->ext
.forall_iterator
);
12092 if (code
->expr1
!= NULL
12093 && (code
->expr1
->ts
.type
!= BT_LOGICAL
|| code
->expr1
->rank
))
12094 gfc_error ("FORALL mask clause at %L requires a scalar LOGICAL "
12095 "expression", &code
->expr1
->where
);
12098 case EXEC_OACC_PARALLEL_LOOP
:
12099 case EXEC_OACC_PARALLEL
:
12100 case EXEC_OACC_KERNELS_LOOP
:
12101 case EXEC_OACC_KERNELS
:
12102 case EXEC_OACC_SERIAL_LOOP
:
12103 case EXEC_OACC_SERIAL
:
12104 case EXEC_OACC_DATA
:
12105 case EXEC_OACC_HOST_DATA
:
12106 case EXEC_OACC_LOOP
:
12107 case EXEC_OACC_UPDATE
:
12108 case EXEC_OACC_WAIT
:
12109 case EXEC_OACC_CACHE
:
12110 case EXEC_OACC_ENTER_DATA
:
12111 case EXEC_OACC_EXIT_DATA
:
12112 case EXEC_OACC_ATOMIC
:
12113 case EXEC_OACC_DECLARE
:
12114 gfc_resolve_oacc_directive (code
, ns
);
12117 case EXEC_OMP_ATOMIC
:
12118 case EXEC_OMP_BARRIER
:
12119 case EXEC_OMP_CANCEL
:
12120 case EXEC_OMP_CANCELLATION_POINT
:
12121 case EXEC_OMP_CRITICAL
:
12122 case EXEC_OMP_FLUSH
:
12123 case EXEC_OMP_DISTRIBUTE
:
12124 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
12125 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
12126 case EXEC_OMP_DISTRIBUTE_SIMD
:
12128 case EXEC_OMP_DO_SIMD
:
12129 case EXEC_OMP_MASTER
:
12130 case EXEC_OMP_ORDERED
:
12131 case EXEC_OMP_SECTIONS
:
12132 case EXEC_OMP_SIMD
:
12133 case EXEC_OMP_SINGLE
:
12134 case EXEC_OMP_TARGET
:
12135 case EXEC_OMP_TARGET_DATA
:
12136 case EXEC_OMP_TARGET_ENTER_DATA
:
12137 case EXEC_OMP_TARGET_EXIT_DATA
:
12138 case EXEC_OMP_TARGET_PARALLEL
:
12139 case EXEC_OMP_TARGET_PARALLEL_DO
:
12140 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
12141 case EXEC_OMP_TARGET_SIMD
:
12142 case EXEC_OMP_TARGET_TEAMS
:
12143 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
12144 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
12145 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
12146 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
12147 case EXEC_OMP_TARGET_UPDATE
:
12148 case EXEC_OMP_TASK
:
12149 case EXEC_OMP_TASKGROUP
:
12150 case EXEC_OMP_TASKLOOP
:
12151 case EXEC_OMP_TASKLOOP_SIMD
:
12152 case EXEC_OMP_TASKWAIT
:
12153 case EXEC_OMP_TASKYIELD
:
12154 case EXEC_OMP_TEAMS
:
12155 case EXEC_OMP_TEAMS_DISTRIBUTE
:
12156 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
12157 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
12158 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
12159 case EXEC_OMP_WORKSHARE
:
12160 gfc_resolve_omp_directive (code
, ns
);
12163 case EXEC_OMP_PARALLEL
:
12164 case EXEC_OMP_PARALLEL_DO
:
12165 case EXEC_OMP_PARALLEL_DO_SIMD
:
12166 case EXEC_OMP_PARALLEL_SECTIONS
:
12167 case EXEC_OMP_PARALLEL_WORKSHARE
:
12168 omp_workshare_save
= omp_workshare_flag
;
12169 omp_workshare_flag
= 0;
12170 gfc_resolve_omp_directive (code
, ns
);
12171 omp_workshare_flag
= omp_workshare_save
;
12175 gfc_internal_error ("gfc_resolve_code(): Bad statement code");
12179 cs_base
= frame
.prev
;
12183 /* Resolve initial values and make sure they are compatible with
12187 resolve_values (gfc_symbol
*sym
)
12191 if (sym
->value
== NULL
)
12194 if (sym
->value
->expr_type
== EXPR_STRUCTURE
)
12195 t
= resolve_structure_cons (sym
->value
, 1);
12197 t
= gfc_resolve_expr (sym
->value
);
12202 gfc_check_assign_symbol (sym
, NULL
, sym
->value
);
12206 /* Verify any BIND(C) derived types in the namespace so we can report errors
12207 for them once, rather than for each variable declared of that type. */
12210 resolve_bind_c_derived_types (gfc_symbol
*derived_sym
)
12212 if (derived_sym
!= NULL
&& derived_sym
->attr
.flavor
== FL_DERIVED
12213 && derived_sym
->attr
.is_bind_c
== 1)
12214 verify_bind_c_derived_type (derived_sym
);
12220 /* Check the interfaces of DTIO procedures associated with derived
12221 type 'sym'. These procedures can either have typebound bindings or
12222 can appear in DTIO generic interfaces. */
12225 gfc_verify_DTIO_procedures (gfc_symbol
*sym
)
12227 if (!sym
|| sym
->attr
.flavor
!= FL_DERIVED
)
12230 gfc_check_dtio_interfaces (sym
);
12235 /* Verify that any binding labels used in a given namespace do not collide
12236 with the names or binding labels of any global symbols. Multiple INTERFACE
12237 for the same procedure are permitted. */
12240 gfc_verify_binding_labels (gfc_symbol
*sym
)
12243 const char *module
;
12245 if (!sym
|| !sym
->attr
.is_bind_c
|| sym
->attr
.is_iso_c
12246 || sym
->attr
.flavor
== FL_DERIVED
|| !sym
->binding_label
)
12249 gsym
= gfc_find_case_gsymbol (gfc_gsym_root
, sym
->binding_label
);
12252 module
= sym
->module
;
12253 else if (sym
->ns
&& sym
->ns
->proc_name
12254 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
12255 module
= sym
->ns
->proc_name
->name
;
12256 else if (sym
->ns
&& sym
->ns
->parent
12257 && sym
->ns
&& sym
->ns
->parent
->proc_name
12258 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12259 module
= sym
->ns
->parent
->proc_name
->name
;
12265 && (gsym
->type
== GSYM_FUNCTION
|| gsym
->type
== GSYM_SUBROUTINE
)))
12268 gsym
= gfc_get_gsymbol (sym
->binding_label
, true);
12269 gsym
->where
= sym
->declared_at
;
12270 gsym
->sym_name
= sym
->name
;
12271 gsym
->binding_label
= sym
->binding_label
;
12272 gsym
->ns
= sym
->ns
;
12273 gsym
->mod_name
= module
;
12274 if (sym
->attr
.function
)
12275 gsym
->type
= GSYM_FUNCTION
;
12276 else if (sym
->attr
.subroutine
)
12277 gsym
->type
= GSYM_SUBROUTINE
;
12278 /* Mark as variable/procedure as defined, unless its an INTERFACE. */
12279 gsym
->defined
= sym
->attr
.if_source
!= IFSRC_IFBODY
;
12283 if (sym
->attr
.flavor
== FL_VARIABLE
&& gsym
->type
!= GSYM_UNKNOWN
)
12285 gfc_error ("Variable %qs with binding label %qs at %L uses the same global "
12286 "identifier as entity at %L", sym
->name
,
12287 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
12288 /* Clear the binding label to prevent checking multiple times. */
12289 sym
->binding_label
= NULL
;
12293 if (sym
->attr
.flavor
== FL_VARIABLE
&& module
12294 && (strcmp (module
, gsym
->mod_name
) != 0
12295 || strcmp (sym
->name
, gsym
->sym_name
) != 0))
12297 /* This can only happen if the variable is defined in a module - if it
12298 isn't the same module, reject it. */
12299 gfc_error ("Variable %qs from module %qs with binding label %qs at %L "
12300 "uses the same global identifier as entity at %L from module %qs",
12301 sym
->name
, module
, sym
->binding_label
,
12302 &sym
->declared_at
, &gsym
->where
, gsym
->mod_name
);
12303 sym
->binding_label
= NULL
;
12307 if ((sym
->attr
.function
|| sym
->attr
.subroutine
)
12308 && ((gsym
->type
!= GSYM_SUBROUTINE
&& gsym
->type
!= GSYM_FUNCTION
)
12309 || (gsym
->defined
&& sym
->attr
.if_source
!= IFSRC_IFBODY
))
12310 && (sym
!= gsym
->ns
->proc_name
&& sym
->attr
.entry
== 0)
12311 && (module
!= gsym
->mod_name
12312 || strcmp (gsym
->sym_name
, sym
->name
) != 0
12313 || (module
&& strcmp (module
, gsym
->mod_name
) != 0)))
12315 /* Print an error if the procedure is defined multiple times; we have to
12316 exclude references to the same procedure via module association or
12317 multiple checks for the same procedure. */
12318 gfc_error ("Procedure %qs with binding label %qs at %L uses the same "
12319 "global identifier as entity at %L", sym
->name
,
12320 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
12321 sym
->binding_label
= NULL
;
12326 /* Resolve an index expression. */
12329 resolve_index_expr (gfc_expr
*e
)
12331 if (!gfc_resolve_expr (e
))
12334 if (!gfc_simplify_expr (e
, 0))
12337 if (!gfc_specification_expr (e
))
12344 /* Resolve a charlen structure. */
12347 resolve_charlen (gfc_charlen
*cl
)
12350 bool saved_specification_expr
;
12356 saved_specification_expr
= specification_expr
;
12357 specification_expr
= true;
12359 if (cl
->length_from_typespec
)
12361 if (!gfc_resolve_expr (cl
->length
))
12363 specification_expr
= saved_specification_expr
;
12367 if (!gfc_simplify_expr (cl
->length
, 0))
12369 specification_expr
= saved_specification_expr
;
12373 /* cl->length has been resolved. It should have an integer type. */
12374 if (cl
->length
->ts
.type
!= BT_INTEGER
|| cl
->length
->rank
!= 0)
12376 gfc_error ("Scalar INTEGER expression expected at %L",
12377 &cl
->length
->where
);
12383 if (!resolve_index_expr (cl
->length
))
12385 specification_expr
= saved_specification_expr
;
12390 /* F2008, 4.4.3.2: If the character length parameter value evaluates to
12391 a negative value, the length of character entities declared is zero. */
12392 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
12393 && mpz_sgn (cl
->length
->value
.integer
) < 0)
12394 gfc_replace_expr (cl
->length
,
12395 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 0));
12397 /* Check that the character length is not too large. */
12398 k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
12399 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
12400 && cl
->length
->ts
.type
== BT_INTEGER
12401 && mpz_cmp (cl
->length
->value
.integer
, gfc_integer_kinds
[k
].huge
) > 0)
12403 gfc_error ("String length at %L is too large", &cl
->length
->where
);
12404 specification_expr
= saved_specification_expr
;
12408 specification_expr
= saved_specification_expr
;
12413 /* Test for non-constant shape arrays. */
12416 is_non_constant_shape_array (gfc_symbol
*sym
)
12422 not_constant
= false;
12423 if (sym
->as
!= NULL
)
12425 /* Unfortunately, !gfc_is_compile_time_shape hits a legal case that
12426 has not been simplified; parameter array references. Do the
12427 simplification now. */
12428 for (i
= 0; i
< sym
->as
->rank
+ sym
->as
->corank
; i
++)
12430 if (i
== GFC_MAX_DIMENSIONS
)
12433 e
= sym
->as
->lower
[i
];
12434 if (e
&& (!resolve_index_expr(e
)
12435 || !gfc_is_constant_expr (e
)))
12436 not_constant
= true;
12437 e
= sym
->as
->upper
[i
];
12438 if (e
&& (!resolve_index_expr(e
)
12439 || !gfc_is_constant_expr (e
)))
12440 not_constant
= true;
12443 return not_constant
;
12446 /* Given a symbol and an initialization expression, add code to initialize
12447 the symbol to the function entry. */
12449 build_init_assign (gfc_symbol
*sym
, gfc_expr
*init
)
12453 gfc_namespace
*ns
= sym
->ns
;
12455 /* Search for the function namespace if this is a contained
12456 function without an explicit result. */
12457 if (sym
->attr
.function
&& sym
== sym
->result
12458 && sym
->name
!= sym
->ns
->proc_name
->name
)
12460 ns
= ns
->contained
;
12461 for (;ns
; ns
= ns
->sibling
)
12462 if (strcmp (ns
->proc_name
->name
, sym
->name
) == 0)
12468 gfc_free_expr (init
);
12472 /* Build an l-value expression for the result. */
12473 lval
= gfc_lval_expr_from_sym (sym
);
12475 /* Add the code at scope entry. */
12476 init_st
= gfc_get_code (EXEC_INIT_ASSIGN
);
12477 init_st
->next
= ns
->code
;
12478 ns
->code
= init_st
;
12480 /* Assign the default initializer to the l-value. */
12481 init_st
->loc
= sym
->declared_at
;
12482 init_st
->expr1
= lval
;
12483 init_st
->expr2
= init
;
12487 /* Whether or not we can generate a default initializer for a symbol. */
12490 can_generate_init (gfc_symbol
*sym
)
12492 symbol_attribute
*a
;
12497 /* These symbols should never have a default initialization. */
12502 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
12503 && (CLASS_DATA (sym
)->attr
.class_pointer
12504 || CLASS_DATA (sym
)->attr
.proc_pointer
))
12505 || a
->in_equivalence
12512 || (!a
->referenced
&& !a
->result
)
12513 || (a
->dummy
&& a
->intent
!= INTENT_OUT
)
12514 || (a
->function
&& sym
!= sym
->result
)
12519 /* Assign the default initializer to a derived type variable or result. */
12522 apply_default_init (gfc_symbol
*sym
)
12524 gfc_expr
*init
= NULL
;
12526 if (sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12529 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
)
12530 init
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12532 if (init
== NULL
&& sym
->ts
.type
!= BT_CLASS
)
12535 build_init_assign (sym
, init
);
12536 sym
->attr
.referenced
= 1;
12540 /* Build an initializer for a local. Returns null if the symbol should not have
12541 a default initialization. */
12544 build_default_init_expr (gfc_symbol
*sym
)
12546 /* These symbols should never have a default initialization. */
12547 if (sym
->attr
.allocatable
12548 || sym
->attr
.external
12550 || sym
->attr
.pointer
12551 || sym
->attr
.in_equivalence
12552 || sym
->attr
.in_common
12555 || sym
->attr
.cray_pointee
12556 || sym
->attr
.cray_pointer
12560 /* Get the appropriate init expression. */
12561 return gfc_build_default_init_expr (&sym
->ts
, &sym
->declared_at
);
12564 /* Add an initialization expression to a local variable. */
12566 apply_default_init_local (gfc_symbol
*sym
)
12568 gfc_expr
*init
= NULL
;
12570 /* The symbol should be a variable or a function return value. */
12571 if ((sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12572 || (sym
->attr
.function
&& sym
->result
!= sym
))
12575 /* Try to build the initializer expression. If we can't initialize
12576 this symbol, then init will be NULL. */
12577 init
= build_default_init_expr (sym
);
12581 /* For saved variables, we don't want to add an initializer at function
12582 entry, so we just add a static initializer. Note that automatic variables
12583 are stack allocated even with -fno-automatic; we have also to exclude
12584 result variable, which are also nonstatic. */
12585 if (!sym
->attr
.automatic
12586 && (sym
->attr
.save
|| sym
->ns
->save_all
12587 || (flag_max_stack_var_size
== 0 && !sym
->attr
.result
12588 && (sym
->ns
->proc_name
&& !sym
->ns
->proc_name
->attr
.recursive
)
12589 && (!sym
->attr
.dimension
|| !is_non_constant_shape_array (sym
)))))
12591 /* Don't clobber an existing initializer! */
12592 gcc_assert (sym
->value
== NULL
);
12597 build_init_assign (sym
, init
);
12601 /* Resolution of common features of flavors variable and procedure. */
12604 resolve_fl_var_and_proc (gfc_symbol
*sym
, int mp_flag
)
12606 gfc_array_spec
*as
;
12608 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12609 as
= CLASS_DATA (sym
)->as
;
12613 /* Constraints on deferred shape variable. */
12614 if (as
== NULL
|| as
->type
!= AS_DEFERRED
)
12616 bool pointer
, allocatable
, dimension
;
12618 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12620 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
12621 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
12622 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
12626 pointer
= sym
->attr
.pointer
&& !sym
->attr
.select_type_temporary
;
12627 allocatable
= sym
->attr
.allocatable
;
12628 dimension
= sym
->attr
.dimension
;
12633 if (dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12635 gfc_error ("Allocatable array %qs at %L must have a deferred "
12636 "shape or assumed rank", sym
->name
, &sym
->declared_at
);
12639 else if (!gfc_notify_std (GFC_STD_F2003
, "Scalar object "
12640 "%qs at %L may not be ALLOCATABLE",
12641 sym
->name
, &sym
->declared_at
))
12645 if (pointer
&& dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12647 gfc_error ("Array pointer %qs at %L must have a deferred shape or "
12648 "assumed rank", sym
->name
, &sym
->declared_at
);
12655 if (!mp_flag
&& !sym
->attr
.allocatable
&& !sym
->attr
.pointer
12656 && sym
->ts
.type
!= BT_CLASS
&& !sym
->assoc
)
12658 gfc_error ("Array %qs at %L cannot have a deferred shape",
12659 sym
->name
, &sym
->declared_at
);
12664 /* Constraints on polymorphic variables. */
12665 if (sym
->ts
.type
== BT_CLASS
&& !(sym
->result
&& sym
->result
!= sym
))
12668 if (sym
->attr
.class_ok
12669 && !sym
->attr
.select_type_temporary
12670 && !UNLIMITED_POLY (sym
)
12671 && !gfc_type_is_extensible (CLASS_DATA (sym
)->ts
.u
.derived
))
12673 gfc_error ("Type %qs of CLASS variable %qs at %L is not extensible",
12674 CLASS_DATA (sym
)->ts
.u
.derived
->name
, sym
->name
,
12675 &sym
->declared_at
);
12680 /* Assume that use associated symbols were checked in the module ns.
12681 Class-variables that are associate-names are also something special
12682 and excepted from the test. */
12683 if (!sym
->attr
.class_ok
&& !sym
->attr
.use_assoc
&& !sym
->assoc
)
12685 gfc_error ("CLASS variable %qs at %L must be dummy, allocatable "
12686 "or pointer", sym
->name
, &sym
->declared_at
);
12695 /* Additional checks for symbols with flavor variable and derived
12696 type. To be called from resolve_fl_variable. */
12699 resolve_fl_variable_derived (gfc_symbol
*sym
, int no_init_flag
)
12701 gcc_assert (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
);
12703 /* Check to see if a derived type is blocked from being host
12704 associated by the presence of another class I symbol in the same
12705 namespace. 14.6.1.3 of the standard and the discussion on
12706 comp.lang.fortran. */
12707 if (sym
->ns
!= sym
->ts
.u
.derived
->ns
12708 && !sym
->ts
.u
.derived
->attr
.use_assoc
12709 && sym
->ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
12712 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 0, &s
);
12713 if (s
&& s
->attr
.generic
)
12714 s
= gfc_find_dt_in_generic (s
);
12715 if (s
&& !gfc_fl_struct (s
->attr
.flavor
))
12717 gfc_error ("The type %qs cannot be host associated at %L "
12718 "because it is blocked by an incompatible object "
12719 "of the same name declared at %L",
12720 sym
->ts
.u
.derived
->name
, &sym
->declared_at
,
12726 /* 4th constraint in section 11.3: "If an object of a type for which
12727 component-initialization is specified (R429) appears in the
12728 specification-part of a module and does not have the ALLOCATABLE
12729 or POINTER attribute, the object shall have the SAVE attribute."
12731 The check for initializers is performed with
12732 gfc_has_default_initializer because gfc_default_initializer generates
12733 a hidden default for allocatable components. */
12734 if (!(sym
->value
|| no_init_flag
) && sym
->ns
->proc_name
12735 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12736 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
) && !sym
->attr
.save
12737 && !sym
->attr
.pointer
&& !sym
->attr
.allocatable
12738 && gfc_has_default_initializer (sym
->ts
.u
.derived
)
12739 && !gfc_notify_std (GFC_STD_F2008
, "Implied SAVE for module variable "
12740 "%qs at %L, needed due to the default "
12741 "initialization", sym
->name
, &sym
->declared_at
))
12744 /* Assign default initializer. */
12745 if (!(sym
->value
|| sym
->attr
.pointer
|| sym
->attr
.allocatable
)
12746 && (!no_init_flag
|| sym
->attr
.intent
== INTENT_OUT
))
12747 sym
->value
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12753 /* F2008, C402 (R401): A colon shall not be used as a type-param-value
12754 except in the declaration of an entity or component that has the POINTER
12755 or ALLOCATABLE attribute. */
12758 deferred_requirements (gfc_symbol
*sym
)
12760 if (sym
->ts
.deferred
12761 && !(sym
->attr
.pointer
12762 || sym
->attr
.allocatable
12763 || sym
->attr
.associate_var
12764 || sym
->attr
.omp_udr_artificial_var
))
12766 /* If a function has a result variable, only check the variable. */
12767 if (sym
->result
&& sym
->name
!= sym
->result
->name
)
12770 gfc_error ("Entity %qs at %L has a deferred type parameter and "
12771 "requires either the POINTER or ALLOCATABLE attribute",
12772 sym
->name
, &sym
->declared_at
);
12779 /* Resolve symbols with flavor variable. */
12782 resolve_fl_variable (gfc_symbol
*sym
, int mp_flag
)
12784 const char *auto_save_msg
= "Automatic object %qs at %L cannot have the "
12787 if (!resolve_fl_var_and_proc (sym
, mp_flag
))
12790 /* Set this flag to check that variables are parameters of all entries.
12791 This check is effected by the call to gfc_resolve_expr through
12792 is_non_constant_shape_array. */
12793 bool saved_specification_expr
= specification_expr
;
12794 specification_expr
= true;
12796 if (sym
->ns
->proc_name
12797 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12798 || sym
->ns
->proc_name
->attr
.is_main_program
)
12799 && !sym
->attr
.use_assoc
12800 && !sym
->attr
.allocatable
12801 && !sym
->attr
.pointer
12802 && is_non_constant_shape_array (sym
))
12804 /* F08:C541. The shape of an array defined in a main program or module
12805 * needs to be constant. */
12806 gfc_error ("The module or main program array %qs at %L must "
12807 "have constant shape", sym
->name
, &sym
->declared_at
);
12808 specification_expr
= saved_specification_expr
;
12812 /* Constraints on deferred type parameter. */
12813 if (!deferred_requirements (sym
))
12816 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.associate_var
)
12818 /* Make sure that character string variables with assumed length are
12819 dummy arguments. */
12820 gfc_expr
*e
= NULL
;
12823 e
= sym
->ts
.u
.cl
->length
;
12827 if (e
== NULL
&& !sym
->attr
.dummy
&& !sym
->attr
.result
12828 && !sym
->ts
.deferred
&& !sym
->attr
.select_type_temporary
12829 && !sym
->attr
.omp_udr_artificial_var
)
12831 gfc_error ("Entity with assumed character length at %L must be a "
12832 "dummy argument or a PARAMETER", &sym
->declared_at
);
12833 specification_expr
= saved_specification_expr
;
12837 if (e
&& sym
->attr
.save
== SAVE_EXPLICIT
&& !gfc_is_constant_expr (e
))
12839 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12840 specification_expr
= saved_specification_expr
;
12844 if (!gfc_is_constant_expr (e
)
12845 && !(e
->expr_type
== EXPR_VARIABLE
12846 && e
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
))
12848 if (!sym
->attr
.use_assoc
&& sym
->ns
->proc_name
12849 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12850 || sym
->ns
->proc_name
->attr
.is_main_program
))
12852 gfc_error ("%qs at %L must have constant character length "
12853 "in this context", sym
->name
, &sym
->declared_at
);
12854 specification_expr
= saved_specification_expr
;
12857 if (sym
->attr
.in_common
)
12859 gfc_error ("COMMON variable %qs at %L must have constant "
12860 "character length", sym
->name
, &sym
->declared_at
);
12861 specification_expr
= saved_specification_expr
;
12867 if (sym
->value
== NULL
&& sym
->attr
.referenced
)
12868 apply_default_init_local (sym
); /* Try to apply a default initialization. */
12870 /* Determine if the symbol may not have an initializer. */
12871 int no_init_flag
= 0, automatic_flag
= 0;
12872 if (sym
->attr
.allocatable
|| sym
->attr
.external
|| sym
->attr
.dummy
12873 || sym
->attr
.intrinsic
|| sym
->attr
.result
)
12875 else if ((sym
->attr
.dimension
|| sym
->attr
.codimension
) && !sym
->attr
.pointer
12876 && is_non_constant_shape_array (sym
))
12878 no_init_flag
= automatic_flag
= 1;
12880 /* Also, they must not have the SAVE attribute.
12881 SAVE_IMPLICIT is checked below. */
12882 if (sym
->as
&& sym
->attr
.codimension
)
12884 int corank
= sym
->as
->corank
;
12885 sym
->as
->corank
= 0;
12886 no_init_flag
= automatic_flag
= is_non_constant_shape_array (sym
);
12887 sym
->as
->corank
= corank
;
12889 if (automatic_flag
&& sym
->attr
.save
== SAVE_EXPLICIT
)
12891 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12892 specification_expr
= saved_specification_expr
;
12897 /* Ensure that any initializer is simplified. */
12899 gfc_simplify_expr (sym
->value
, 1);
12901 /* Reject illegal initializers. */
12902 if (!sym
->mark
&& sym
->value
)
12904 if (sym
->attr
.allocatable
|| (sym
->ts
.type
== BT_CLASS
12905 && CLASS_DATA (sym
)->attr
.allocatable
))
12906 gfc_error ("Allocatable %qs at %L cannot have an initializer",
12907 sym
->name
, &sym
->declared_at
);
12908 else if (sym
->attr
.external
)
12909 gfc_error ("External %qs at %L cannot have an initializer",
12910 sym
->name
, &sym
->declared_at
);
12911 else if (sym
->attr
.dummy
12912 && !(sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.intent
== INTENT_OUT
))
12913 gfc_error ("Dummy %qs at %L cannot have an initializer",
12914 sym
->name
, &sym
->declared_at
);
12915 else if (sym
->attr
.intrinsic
)
12916 gfc_error ("Intrinsic %qs at %L cannot have an initializer",
12917 sym
->name
, &sym
->declared_at
);
12918 else if (sym
->attr
.result
)
12919 gfc_error ("Function result %qs at %L cannot have an initializer",
12920 sym
->name
, &sym
->declared_at
);
12921 else if (automatic_flag
)
12922 gfc_error ("Automatic array %qs at %L cannot have an initializer",
12923 sym
->name
, &sym
->declared_at
);
12925 goto no_init_error
;
12926 specification_expr
= saved_specification_expr
;
12931 if (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
)
12933 bool res
= resolve_fl_variable_derived (sym
, no_init_flag
);
12934 specification_expr
= saved_specification_expr
;
12938 specification_expr
= saved_specification_expr
;
12943 /* Compare the dummy characteristics of a module procedure interface
12944 declaration with the corresponding declaration in a submodule. */
12945 static gfc_formal_arglist
*new_formal
;
12946 static char errmsg
[200];
12949 compare_fsyms (gfc_symbol
*sym
)
12953 if (sym
== NULL
|| new_formal
== NULL
)
12956 fsym
= new_formal
->sym
;
12961 if (strcmp (sym
->name
, fsym
->name
) == 0)
12963 if (!gfc_check_dummy_characteristics (fsym
, sym
, true, errmsg
, 200))
12964 gfc_error ("%s at %L", errmsg
, &fsym
->declared_at
);
12969 /* Resolve a procedure. */
12972 resolve_fl_procedure (gfc_symbol
*sym
, int mp_flag
)
12974 gfc_formal_arglist
*arg
;
12976 if (sym
->attr
.function
12977 && !resolve_fl_var_and_proc (sym
, mp_flag
))
12980 /* Constraints on deferred type parameter. */
12981 if (!deferred_requirements (sym
))
12984 if (sym
->ts
.type
== BT_CHARACTER
)
12986 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
12988 if (cl
&& cl
->length
&& gfc_is_constant_expr (cl
->length
)
12989 && !resolve_charlen (cl
))
12992 if ((!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
12993 && sym
->attr
.proc
== PROC_ST_FUNCTION
)
12995 gfc_error ("Character-valued statement function %qs at %L must "
12996 "have constant length", sym
->name
, &sym
->declared_at
);
13001 /* Ensure that derived type for are not of a private type. Internal
13002 module procedures are excluded by 2.2.3.3 - i.e., they are not
13003 externally accessible and can access all the objects accessible in
13005 if (!(sym
->ns
->parent
&& sym
->ns
->parent
->proc_name
13006 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
13007 && gfc_check_symbol_access (sym
))
13009 gfc_interface
*iface
;
13011 for (arg
= gfc_sym_get_dummy_args (sym
); arg
; arg
= arg
->next
)
13014 && arg
->sym
->ts
.type
== BT_DERIVED
13015 && arg
->sym
->ts
.u
.derived
13016 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
13017 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
13018 && !gfc_notify_std (GFC_STD_F2003
, "%qs is of a PRIVATE type "
13019 "and cannot be a dummy argument"
13020 " of %qs, which is PUBLIC at %L",
13021 arg
->sym
->name
, sym
->name
,
13022 &sym
->declared_at
))
13024 /* Stop this message from recurring. */
13025 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
13030 /* PUBLIC interfaces may expose PRIVATE procedures that take types
13031 PRIVATE to the containing module. */
13032 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
13034 for (arg
= gfc_sym_get_dummy_args (iface
->sym
); arg
; arg
= arg
->next
)
13037 && arg
->sym
->ts
.type
== BT_DERIVED
13038 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
13039 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
13040 && !gfc_notify_std (GFC_STD_F2003
, "Procedure %qs in "
13041 "PUBLIC interface %qs at %L "
13042 "takes dummy arguments of %qs which "
13043 "is PRIVATE", iface
->sym
->name
,
13044 sym
->name
, &iface
->sym
->declared_at
,
13045 gfc_typename(&arg
->sym
->ts
)))
13047 /* Stop this message from recurring. */
13048 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
13055 if (sym
->attr
.function
&& sym
->value
&& sym
->attr
.proc
!= PROC_ST_FUNCTION
13056 && !sym
->attr
.proc_pointer
)
13058 gfc_error ("Function %qs at %L cannot have an initializer",
13059 sym
->name
, &sym
->declared_at
);
13061 /* Make sure no second error is issued for this. */
13062 sym
->value
->error
= 1;
13066 /* An external symbol may not have an initializer because it is taken to be
13067 a procedure. Exception: Procedure Pointers. */
13068 if (sym
->attr
.external
&& sym
->value
&& !sym
->attr
.proc_pointer
)
13070 gfc_error ("External object %qs at %L may not have an initializer",
13071 sym
->name
, &sym
->declared_at
);
13075 /* An elemental function is required to return a scalar 12.7.1 */
13076 if (sym
->attr
.elemental
&& sym
->attr
.function
13077 && (sym
->as
|| (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)))
13079 gfc_error ("ELEMENTAL function %qs at %L must have a scalar "
13080 "result", sym
->name
, &sym
->declared_at
);
13081 /* Reset so that the error only occurs once. */
13082 sym
->attr
.elemental
= 0;
13086 if (sym
->attr
.proc
== PROC_ST_FUNCTION
13087 && (sym
->attr
.allocatable
|| sym
->attr
.pointer
))
13089 gfc_error ("Statement function %qs at %L may not have pointer or "
13090 "allocatable attribute", sym
->name
, &sym
->declared_at
);
13094 /* 5.1.1.5 of the Standard: A function name declared with an asterisk
13095 char-len-param shall not be array-valued, pointer-valued, recursive
13096 or pure. ....snip... A character value of * may only be used in the
13097 following ways: (i) Dummy arg of procedure - dummy associates with
13098 actual length; (ii) To declare a named constant; or (iii) External
13099 function - but length must be declared in calling scoping unit. */
13100 if (sym
->attr
.function
13101 && sym
->ts
.type
== BT_CHARACTER
&& !sym
->ts
.deferred
13102 && sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
== NULL
)
13104 if ((sym
->as
&& sym
->as
->rank
) || (sym
->attr
.pointer
)
13105 || (sym
->attr
.recursive
) || (sym
->attr
.pure
))
13107 if (sym
->as
&& sym
->as
->rank
)
13108 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
13109 "array-valued", sym
->name
, &sym
->declared_at
);
13111 if (sym
->attr
.pointer
)
13112 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
13113 "pointer-valued", sym
->name
, &sym
->declared_at
);
13115 if (sym
->attr
.pure
)
13116 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
13117 "pure", sym
->name
, &sym
->declared_at
);
13119 if (sym
->attr
.recursive
)
13120 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
13121 "recursive", sym
->name
, &sym
->declared_at
);
13126 /* Appendix B.2 of the standard. Contained functions give an
13127 error anyway. Deferred character length is an F2003 feature.
13128 Don't warn on intrinsic conversion functions, which start
13129 with two underscores. */
13130 if (!sym
->attr
.contained
&& !sym
->ts
.deferred
13131 && (sym
->name
[0] != '_' || sym
->name
[1] != '_'))
13132 gfc_notify_std (GFC_STD_F95_OBS
,
13133 "CHARACTER(*) function %qs at %L",
13134 sym
->name
, &sym
->declared_at
);
13137 /* F2008, C1218. */
13138 if (sym
->attr
.elemental
)
13140 if (sym
->attr
.proc_pointer
)
13142 const char* name
= (sym
->attr
.result
? sym
->ns
->proc_name
->name
13144 gfc_error ("Procedure pointer %qs at %L shall not be elemental",
13145 name
, &sym
->declared_at
);
13148 if (sym
->attr
.dummy
)
13150 gfc_error ("Dummy procedure %qs at %L shall not be elemental",
13151 sym
->name
, &sym
->declared_at
);
13156 /* F2018, C15100: "The result of an elemental function shall be scalar,
13157 and shall not have the POINTER or ALLOCATABLE attribute." The scalar
13158 pointer is tested and caught elsewhere. */
13159 if (sym
->attr
.elemental
&& sym
->result
13160 && (sym
->result
->attr
.allocatable
|| sym
->result
->attr
.pointer
))
13162 gfc_error ("Function result variable %qs at %L of elemental "
13163 "function %qs shall not have an ALLOCATABLE or POINTER "
13164 "attribute", sym
->result
->name
,
13165 &sym
->result
->declared_at
, sym
->name
);
13169 if (sym
->attr
.is_bind_c
&& sym
->attr
.is_c_interop
!= 1)
13171 gfc_formal_arglist
*curr_arg
;
13172 int has_non_interop_arg
= 0;
13174 if (!verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
13175 sym
->common_block
))
13177 /* Clear these to prevent looking at them again if there was an
13179 sym
->attr
.is_bind_c
= 0;
13180 sym
->attr
.is_c_interop
= 0;
13181 sym
->ts
.is_c_interop
= 0;
13185 /* So far, no errors have been found. */
13186 sym
->attr
.is_c_interop
= 1;
13187 sym
->ts
.is_c_interop
= 1;
13190 curr_arg
= gfc_sym_get_dummy_args (sym
);
13191 while (curr_arg
!= NULL
)
13193 /* Skip implicitly typed dummy args here. */
13194 if (curr_arg
->sym
&& curr_arg
->sym
->attr
.implicit_type
== 0)
13195 if (!gfc_verify_c_interop_param (curr_arg
->sym
))
13196 /* If something is found to fail, record the fact so we
13197 can mark the symbol for the procedure as not being
13198 BIND(C) to try and prevent multiple errors being
13200 has_non_interop_arg
= 1;
13202 curr_arg
= curr_arg
->next
;
13205 /* See if any of the arguments were not interoperable and if so, clear
13206 the procedure symbol to prevent duplicate error messages. */
13207 if (has_non_interop_arg
!= 0)
13209 sym
->attr
.is_c_interop
= 0;
13210 sym
->ts
.is_c_interop
= 0;
13211 sym
->attr
.is_bind_c
= 0;
13215 if (!sym
->attr
.proc_pointer
)
13217 if (sym
->attr
.save
== SAVE_EXPLICIT
)
13219 gfc_error ("PROCEDURE attribute conflicts with SAVE attribute "
13220 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13223 if (sym
->attr
.intent
)
13225 gfc_error ("PROCEDURE attribute conflicts with INTENT attribute "
13226 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13229 if (sym
->attr
.subroutine
&& sym
->attr
.result
)
13231 gfc_error ("PROCEDURE attribute conflicts with RESULT attribute "
13232 "in %qs at %L", sym
->ns
->proc_name
->name
, &sym
->declared_at
);
13235 if (sym
->attr
.external
&& sym
->attr
.function
&& !sym
->attr
.module_procedure
13236 && ((sym
->attr
.if_source
== IFSRC_DECL
&& !sym
->attr
.procedure
)
13237 || sym
->attr
.contained
))
13239 gfc_error ("EXTERNAL attribute conflicts with FUNCTION attribute "
13240 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13243 if (strcmp ("ppr@", sym
->name
) == 0)
13245 gfc_error ("Procedure pointer result %qs at %L "
13246 "is missing the pointer attribute",
13247 sym
->ns
->proc_name
->name
, &sym
->declared_at
);
13252 /* Assume that a procedure whose body is not known has references
13253 to external arrays. */
13254 if (sym
->attr
.if_source
!= IFSRC_DECL
)
13255 sym
->attr
.array_outer_dependency
= 1;
13257 /* Compare the characteristics of a module procedure with the
13258 interface declaration. Ideally this would be done with
13259 gfc_compare_interfaces but, at present, the formal interface
13260 cannot be copied to the ts.interface. */
13261 if (sym
->attr
.module_procedure
13262 && sym
->attr
.if_source
== IFSRC_DECL
)
13265 char name
[2*GFC_MAX_SYMBOL_LEN
+ 1];
13267 char *submodule_name
;
13268 strcpy (name
, sym
->ns
->proc_name
->name
);
13269 module_name
= strtok (name
, ".");
13270 submodule_name
= strtok (NULL
, ".");
13272 iface
= sym
->tlink
;
13275 /* Make sure that the result uses the correct charlen for deferred
13277 if (iface
&& sym
->result
13278 && iface
->ts
.type
== BT_CHARACTER
13279 && iface
->ts
.deferred
)
13280 sym
->result
->ts
.u
.cl
= iface
->ts
.u
.cl
;
13285 /* Check the procedure characteristics. */
13286 if (sym
->attr
.elemental
!= iface
->attr
.elemental
)
13288 gfc_error ("Mismatch in ELEMENTAL attribute between MODULE "
13289 "PROCEDURE at %L and its interface in %s",
13290 &sym
->declared_at
, module_name
);
13294 if (sym
->attr
.pure
!= iface
->attr
.pure
)
13296 gfc_error ("Mismatch in PURE attribute between MODULE "
13297 "PROCEDURE at %L and its interface in %s",
13298 &sym
->declared_at
, module_name
);
13302 if (sym
->attr
.recursive
!= iface
->attr
.recursive
)
13304 gfc_error ("Mismatch in RECURSIVE attribute between MODULE "
13305 "PROCEDURE at %L and its interface in %s",
13306 &sym
->declared_at
, module_name
);
13310 /* Check the result characteristics. */
13311 if (!gfc_check_result_characteristics (sym
, iface
, errmsg
, 200))
13313 gfc_error ("%s between the MODULE PROCEDURE declaration "
13314 "in MODULE %qs and the declaration at %L in "
13316 errmsg
, module_name
, &sym
->declared_at
,
13317 submodule_name
? submodule_name
: module_name
);
13322 /* Check the characteristics of the formal arguments. */
13323 if (sym
->formal
&& sym
->formal_ns
)
13325 for (arg
= sym
->formal
; arg
&& arg
->sym
; arg
= arg
->next
)
13328 gfc_traverse_ns (sym
->formal_ns
, compare_fsyms
);
13336 /* Resolve a list of finalizer procedures. That is, after they have hopefully
13337 been defined and we now know their defined arguments, check that they fulfill
13338 the requirements of the standard for procedures used as finalizers. */
13341 gfc_resolve_finalizers (gfc_symbol
* derived
, bool *finalizable
)
13343 gfc_finalizer
* list
;
13344 gfc_finalizer
** prev_link
; /* For removing wrong entries from the list. */
13345 bool result
= true;
13346 bool seen_scalar
= false;
13349 gfc_symbol
*parent
= gfc_get_derived_super_type (derived
);
13352 gfc_resolve_finalizers (parent
, finalizable
);
13354 /* Ensure that derived-type components have a their finalizers resolved. */
13355 bool has_final
= derived
->f2k_derived
&& derived
->f2k_derived
->finalizers
;
13356 for (c
= derived
->components
; c
; c
= c
->next
)
13357 if (c
->ts
.type
== BT_DERIVED
13358 && !c
->attr
.pointer
&& !c
->attr
.proc_pointer
&& !c
->attr
.allocatable
)
13360 bool has_final2
= false;
13361 if (!gfc_resolve_finalizers (c
->ts
.u
.derived
, &has_final2
))
13362 return false; /* Error. */
13363 has_final
= has_final
|| has_final2
;
13365 /* Return early if not finalizable. */
13369 *finalizable
= false;
13373 /* Walk over the list of finalizer-procedures, check them, and if any one
13374 does not fit in with the standard's definition, print an error and remove
13375 it from the list. */
13376 prev_link
= &derived
->f2k_derived
->finalizers
;
13377 for (list
= derived
->f2k_derived
->finalizers
; list
; list
= *prev_link
)
13379 gfc_formal_arglist
*dummy_args
;
13384 /* Skip this finalizer if we already resolved it. */
13385 if (list
->proc_tree
)
13387 if (list
->proc_tree
->n
.sym
->formal
->sym
->as
== NULL
13388 || list
->proc_tree
->n
.sym
->formal
->sym
->as
->rank
== 0)
13389 seen_scalar
= true;
13390 prev_link
= &(list
->next
);
13394 /* Check this exists and is a SUBROUTINE. */
13395 if (!list
->proc_sym
->attr
.subroutine
)
13397 gfc_error ("FINAL procedure %qs at %L is not a SUBROUTINE",
13398 list
->proc_sym
->name
, &list
->where
);
13402 /* We should have exactly one argument. */
13403 dummy_args
= gfc_sym_get_dummy_args (list
->proc_sym
);
13404 if (!dummy_args
|| dummy_args
->next
)
13406 gfc_error ("FINAL procedure at %L must have exactly one argument",
13410 arg
= dummy_args
->sym
;
13412 /* This argument must be of our type. */
13413 if (arg
->ts
.type
!= BT_DERIVED
|| arg
->ts
.u
.derived
!= derived
)
13415 gfc_error ("Argument of FINAL procedure at %L must be of type %qs",
13416 &arg
->declared_at
, derived
->name
);
13420 /* It must neither be a pointer nor allocatable nor optional. */
13421 if (arg
->attr
.pointer
)
13423 gfc_error ("Argument of FINAL procedure at %L must not be a POINTER",
13424 &arg
->declared_at
);
13427 if (arg
->attr
.allocatable
)
13429 gfc_error ("Argument of FINAL procedure at %L must not be"
13430 " ALLOCATABLE", &arg
->declared_at
);
13433 if (arg
->attr
.optional
)
13435 gfc_error ("Argument of FINAL procedure at %L must not be OPTIONAL",
13436 &arg
->declared_at
);
13440 /* It must not be INTENT(OUT). */
13441 if (arg
->attr
.intent
== INTENT_OUT
)
13443 gfc_error ("Argument of FINAL procedure at %L must not be"
13444 " INTENT(OUT)", &arg
->declared_at
);
13448 /* Warn if the procedure is non-scalar and not assumed shape. */
13449 if (warn_surprising
&& arg
->as
&& arg
->as
->rank
!= 0
13450 && arg
->as
->type
!= AS_ASSUMED_SHAPE
)
13451 gfc_warning (OPT_Wsurprising
,
13452 "Non-scalar FINAL procedure at %L should have assumed"
13453 " shape argument", &arg
->declared_at
);
13455 /* Check that it does not match in kind and rank with a FINAL procedure
13456 defined earlier. To really loop over the *earlier* declarations,
13457 we need to walk the tail of the list as new ones were pushed at the
13459 /* TODO: Handle kind parameters once they are implemented. */
13460 my_rank
= (arg
->as
? arg
->as
->rank
: 0);
13461 for (i
= list
->next
; i
; i
= i
->next
)
13463 gfc_formal_arglist
*dummy_args
;
13465 /* Argument list might be empty; that is an error signalled earlier,
13466 but we nevertheless continued resolving. */
13467 dummy_args
= gfc_sym_get_dummy_args (i
->proc_sym
);
13470 gfc_symbol
* i_arg
= dummy_args
->sym
;
13471 const int i_rank
= (i_arg
->as
? i_arg
->as
->rank
: 0);
13472 if (i_rank
== my_rank
)
13474 gfc_error ("FINAL procedure %qs declared at %L has the same"
13475 " rank (%d) as %qs",
13476 list
->proc_sym
->name
, &list
->where
, my_rank
,
13477 i
->proc_sym
->name
);
13483 /* Is this the/a scalar finalizer procedure? */
13485 seen_scalar
= true;
13487 /* Find the symtree for this procedure. */
13488 gcc_assert (!list
->proc_tree
);
13489 list
->proc_tree
= gfc_find_sym_in_symtree (list
->proc_sym
);
13491 prev_link
= &list
->next
;
13494 /* Remove wrong nodes immediately from the list so we don't risk any
13495 troubles in the future when they might fail later expectations. */
13498 *prev_link
= list
->next
;
13499 gfc_free_finalizer (i
);
13503 if (result
== false)
13506 /* Warn if we haven't seen a scalar finalizer procedure (but we know there
13507 were nodes in the list, must have been for arrays. It is surely a good
13508 idea to have a scalar version there if there's something to finalize. */
13509 if (warn_surprising
&& derived
->f2k_derived
->finalizers
&& !seen_scalar
)
13510 gfc_warning (OPT_Wsurprising
,
13511 "Only array FINAL procedures declared for derived type %qs"
13512 " defined at %L, suggest also scalar one",
13513 derived
->name
, &derived
->declared_at
);
13515 vtab
= gfc_find_derived_vtab (derived
);
13516 c
= vtab
->ts
.u
.derived
->components
->next
->next
->next
->next
->next
;
13517 gfc_set_sym_referenced (c
->initializer
->symtree
->n
.sym
);
13520 *finalizable
= true;
13526 /* Check if two GENERIC targets are ambiguous and emit an error is they are. */
13529 check_generic_tbp_ambiguity (gfc_tbp_generic
* t1
, gfc_tbp_generic
* t2
,
13530 const char* generic_name
, locus where
)
13532 gfc_symbol
*sym1
, *sym2
;
13533 const char *pass1
, *pass2
;
13534 gfc_formal_arglist
*dummy_args
;
13536 gcc_assert (t1
->specific
&& t2
->specific
);
13537 gcc_assert (!t1
->specific
->is_generic
);
13538 gcc_assert (!t2
->specific
->is_generic
);
13539 gcc_assert (t1
->is_operator
== t2
->is_operator
);
13541 sym1
= t1
->specific
->u
.specific
->n
.sym
;
13542 sym2
= t2
->specific
->u
.specific
->n
.sym
;
13547 /* Both must be SUBROUTINEs or both must be FUNCTIONs. */
13548 if (sym1
->attr
.subroutine
!= sym2
->attr
.subroutine
13549 || sym1
->attr
.function
!= sym2
->attr
.function
)
13551 gfc_error ("%qs and %qs cannot be mixed FUNCTION/SUBROUTINE for"
13552 " GENERIC %qs at %L",
13553 sym1
->name
, sym2
->name
, generic_name
, &where
);
13557 /* Determine PASS arguments. */
13558 if (t1
->specific
->nopass
)
13560 else if (t1
->specific
->pass_arg
)
13561 pass1
= t1
->specific
->pass_arg
;
13564 dummy_args
= gfc_sym_get_dummy_args (t1
->specific
->u
.specific
->n
.sym
);
13566 pass1
= dummy_args
->sym
->name
;
13570 if (t2
->specific
->nopass
)
13572 else if (t2
->specific
->pass_arg
)
13573 pass2
= t2
->specific
->pass_arg
;
13576 dummy_args
= gfc_sym_get_dummy_args (t2
->specific
->u
.specific
->n
.sym
);
13578 pass2
= dummy_args
->sym
->name
;
13583 /* Compare the interfaces. */
13584 if (gfc_compare_interfaces (sym1
, sym2
, sym2
->name
, !t1
->is_operator
, 0,
13585 NULL
, 0, pass1
, pass2
))
13587 gfc_error ("%qs and %qs for GENERIC %qs at %L are ambiguous",
13588 sym1
->name
, sym2
->name
, generic_name
, &where
);
13596 /* Worker function for resolving a generic procedure binding; this is used to
13597 resolve GENERIC as well as user and intrinsic OPERATOR typebound procedures.
13599 The difference between those cases is finding possible inherited bindings
13600 that are overridden, as one has to look for them in tb_sym_root,
13601 tb_uop_root or tb_op, respectively. Thus the caller must already find
13602 the super-type and set p->overridden correctly. */
13605 resolve_tb_generic_targets (gfc_symbol
* super_type
,
13606 gfc_typebound_proc
* p
, const char* name
)
13608 gfc_tbp_generic
* target
;
13609 gfc_symtree
* first_target
;
13610 gfc_symtree
* inherited
;
13612 gcc_assert (p
&& p
->is_generic
);
13614 /* Try to find the specific bindings for the symtrees in our target-list. */
13615 gcc_assert (p
->u
.generic
);
13616 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13617 if (!target
->specific
)
13619 gfc_typebound_proc
* overridden_tbp
;
13620 gfc_tbp_generic
* g
;
13621 const char* target_name
;
13623 target_name
= target
->specific_st
->name
;
13625 /* Defined for this type directly. */
13626 if (target
->specific_st
->n
.tb
&& !target
->specific_st
->n
.tb
->error
)
13628 target
->specific
= target
->specific_st
->n
.tb
;
13629 goto specific_found
;
13632 /* Look for an inherited specific binding. */
13635 inherited
= gfc_find_typebound_proc (super_type
, NULL
, target_name
,
13640 gcc_assert (inherited
->n
.tb
);
13641 target
->specific
= inherited
->n
.tb
;
13642 goto specific_found
;
13646 gfc_error ("Undefined specific binding %qs as target of GENERIC %qs"
13647 " at %L", target_name
, name
, &p
->where
);
13650 /* Once we've found the specific binding, check it is not ambiguous with
13651 other specifics already found or inherited for the same GENERIC. */
13653 gcc_assert (target
->specific
);
13655 /* This must really be a specific binding! */
13656 if (target
->specific
->is_generic
)
13658 gfc_error ("GENERIC %qs at %L must target a specific binding,"
13659 " %qs is GENERIC, too", name
, &p
->where
, target_name
);
13663 /* Check those already resolved on this type directly. */
13664 for (g
= p
->u
.generic
; g
; g
= g
->next
)
13665 if (g
!= target
&& g
->specific
13666 && !check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13669 /* Check for ambiguity with inherited specific targets. */
13670 for (overridden_tbp
= p
->overridden
; overridden_tbp
;
13671 overridden_tbp
= overridden_tbp
->overridden
)
13672 if (overridden_tbp
->is_generic
)
13674 for (g
= overridden_tbp
->u
.generic
; g
; g
= g
->next
)
13676 gcc_assert (g
->specific
);
13677 if (!check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13683 /* If we attempt to "overwrite" a specific binding, this is an error. */
13684 if (p
->overridden
&& !p
->overridden
->is_generic
)
13686 gfc_error ("GENERIC %qs at %L cannot overwrite specific binding with"
13687 " the same name", name
, &p
->where
);
13691 /* Take the SUBROUTINE/FUNCTION attributes of the first specific target, as
13692 all must have the same attributes here. */
13693 first_target
= p
->u
.generic
->specific
->u
.specific
;
13694 gcc_assert (first_target
);
13695 p
->subroutine
= first_target
->n
.sym
->attr
.subroutine
;
13696 p
->function
= first_target
->n
.sym
->attr
.function
;
13702 /* Resolve a GENERIC procedure binding for a derived type. */
13705 resolve_typebound_generic (gfc_symbol
* derived
, gfc_symtree
* st
)
13707 gfc_symbol
* super_type
;
13709 /* Find the overridden binding if any. */
13710 st
->n
.tb
->overridden
= NULL
;
13711 super_type
= gfc_get_derived_super_type (derived
);
13714 gfc_symtree
* overridden
;
13715 overridden
= gfc_find_typebound_proc (super_type
, NULL
, st
->name
,
13718 if (overridden
&& overridden
->n
.tb
)
13719 st
->n
.tb
->overridden
= overridden
->n
.tb
;
13722 /* Resolve using worker function. */
13723 return resolve_tb_generic_targets (super_type
, st
->n
.tb
, st
->name
);
13727 /* Retrieve the target-procedure of an operator binding and do some checks in
13728 common for intrinsic and user-defined type-bound operators. */
13731 get_checked_tb_operator_target (gfc_tbp_generic
* target
, locus where
)
13733 gfc_symbol
* target_proc
;
13735 gcc_assert (target
->specific
&& !target
->specific
->is_generic
);
13736 target_proc
= target
->specific
->u
.specific
->n
.sym
;
13737 gcc_assert (target_proc
);
13739 /* F08:C468. All operator bindings must have a passed-object dummy argument. */
13740 if (target
->specific
->nopass
)
13742 gfc_error ("Type-bound operator at %L cannot be NOPASS", &where
);
13746 return target_proc
;
13750 /* Resolve a type-bound intrinsic operator. */
13753 resolve_typebound_intrinsic_op (gfc_symbol
* derived
, gfc_intrinsic_op op
,
13754 gfc_typebound_proc
* p
)
13756 gfc_symbol
* super_type
;
13757 gfc_tbp_generic
* target
;
13759 /* If there's already an error here, do nothing (but don't fail again). */
13763 /* Operators should always be GENERIC bindings. */
13764 gcc_assert (p
->is_generic
);
13766 /* Look for an overridden binding. */
13767 super_type
= gfc_get_derived_super_type (derived
);
13768 if (super_type
&& super_type
->f2k_derived
)
13769 p
->overridden
= gfc_find_typebound_intrinsic_op (super_type
, NULL
,
13772 p
->overridden
= NULL
;
13774 /* Resolve general GENERIC properties using worker function. */
13775 if (!resolve_tb_generic_targets (super_type
, p
, gfc_op2string(op
)))
13778 /* Check the targets to be procedures of correct interface. */
13779 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13781 gfc_symbol
* target_proc
;
13783 target_proc
= get_checked_tb_operator_target (target
, p
->where
);
13787 if (!gfc_check_operator_interface (target_proc
, op
, p
->where
))
13790 /* Add target to non-typebound operator list. */
13791 if (!target
->specific
->deferred
&& !derived
->attr
.use_assoc
13792 && p
->access
!= ACCESS_PRIVATE
&& derived
->ns
== gfc_current_ns
)
13794 gfc_interface
*head
, *intr
;
13796 /* Preempt 'gfc_check_new_interface' for submodules, where the
13797 mechanism for handling module procedures winds up resolving
13798 operator interfaces twice and would otherwise cause an error. */
13799 for (intr
= derived
->ns
->op
[op
]; intr
; intr
= intr
->next
)
13800 if (intr
->sym
== target_proc
13801 && target_proc
->attr
.used_in_submodule
)
13804 if (!gfc_check_new_interface (derived
->ns
->op
[op
],
13805 target_proc
, p
->where
))
13807 head
= derived
->ns
->op
[op
];
13808 intr
= gfc_get_interface ();
13809 intr
->sym
= target_proc
;
13810 intr
->where
= p
->where
;
13812 derived
->ns
->op
[op
] = intr
;
13824 /* Resolve a type-bound user operator (tree-walker callback). */
13826 static gfc_symbol
* resolve_bindings_derived
;
13827 static bool resolve_bindings_result
;
13829 static bool check_uop_procedure (gfc_symbol
* sym
, locus where
);
13832 resolve_typebound_user_op (gfc_symtree
* stree
)
13834 gfc_symbol
* super_type
;
13835 gfc_tbp_generic
* target
;
13837 gcc_assert (stree
&& stree
->n
.tb
);
13839 if (stree
->n
.tb
->error
)
13842 /* Operators should always be GENERIC bindings. */
13843 gcc_assert (stree
->n
.tb
->is_generic
);
13845 /* Find overridden procedure, if any. */
13846 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13847 if (super_type
&& super_type
->f2k_derived
)
13849 gfc_symtree
* overridden
;
13850 overridden
= gfc_find_typebound_user_op (super_type
, NULL
,
13851 stree
->name
, true, NULL
);
13853 if (overridden
&& overridden
->n
.tb
)
13854 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13857 stree
->n
.tb
->overridden
= NULL
;
13859 /* Resolve basically using worker function. */
13860 if (!resolve_tb_generic_targets (super_type
, stree
->n
.tb
, stree
->name
))
13863 /* Check the targets to be functions of correct interface. */
13864 for (target
= stree
->n
.tb
->u
.generic
; target
; target
= target
->next
)
13866 gfc_symbol
* target_proc
;
13868 target_proc
= get_checked_tb_operator_target (target
, stree
->n
.tb
->where
);
13872 if (!check_uop_procedure (target_proc
, stree
->n
.tb
->where
))
13879 resolve_bindings_result
= false;
13880 stree
->n
.tb
->error
= 1;
13884 /* Resolve the type-bound procedures for a derived type. */
13887 resolve_typebound_procedure (gfc_symtree
* stree
)
13891 gfc_symbol
* me_arg
;
13892 gfc_symbol
* super_type
;
13893 gfc_component
* comp
;
13895 gcc_assert (stree
);
13897 /* Undefined specific symbol from GENERIC target definition. */
13901 if (stree
->n
.tb
->error
)
13904 /* If this is a GENERIC binding, use that routine. */
13905 if (stree
->n
.tb
->is_generic
)
13907 if (!resolve_typebound_generic (resolve_bindings_derived
, stree
))
13912 /* Get the target-procedure to check it. */
13913 gcc_assert (!stree
->n
.tb
->is_generic
);
13914 gcc_assert (stree
->n
.tb
->u
.specific
);
13915 proc
= stree
->n
.tb
->u
.specific
->n
.sym
;
13916 where
= stree
->n
.tb
->where
;
13918 /* Default access should already be resolved from the parser. */
13919 gcc_assert (stree
->n
.tb
->access
!= ACCESS_UNKNOWN
);
13921 if (stree
->n
.tb
->deferred
)
13923 if (!check_proc_interface (proc
, &where
))
13928 /* If proc has not been resolved at this point, proc->name may
13929 actually be a USE associated entity. See PR fortran/89647. */
13930 if (!proc
->resolve_symbol_called
13931 && proc
->attr
.function
== 0 && proc
->attr
.subroutine
== 0)
13934 gfc_find_symbol (proc
->name
, gfc_current_ns
->parent
, 1, &tmp
);
13935 if (tmp
&& tmp
->attr
.use_assoc
)
13937 proc
->module
= tmp
->module
;
13938 proc
->attr
.proc
= tmp
->attr
.proc
;
13939 proc
->attr
.function
= tmp
->attr
.function
;
13940 proc
->attr
.subroutine
= tmp
->attr
.subroutine
;
13941 proc
->attr
.use_assoc
= tmp
->attr
.use_assoc
;
13942 proc
->ts
= tmp
->ts
;
13943 proc
->result
= tmp
->result
;
13947 /* Check for F08:C465. */
13948 if ((!proc
->attr
.subroutine
&& !proc
->attr
.function
)
13949 || (proc
->attr
.proc
!= PROC_MODULE
13950 && proc
->attr
.if_source
!= IFSRC_IFBODY
)
13951 || proc
->attr
.abstract
)
13953 gfc_error ("%qs must be a module procedure or an external "
13954 "procedure with an explicit interface at %L",
13955 proc
->name
, &where
);
13960 stree
->n
.tb
->subroutine
= proc
->attr
.subroutine
;
13961 stree
->n
.tb
->function
= proc
->attr
.function
;
13963 /* Find the super-type of the current derived type. We could do this once and
13964 store in a global if speed is needed, but as long as not I believe this is
13965 more readable and clearer. */
13966 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13968 /* If PASS, resolve and check arguments if not already resolved / loaded
13969 from a .mod file. */
13970 if (!stree
->n
.tb
->nopass
&& stree
->n
.tb
->pass_arg_num
== 0)
13972 gfc_formal_arglist
*dummy_args
;
13974 dummy_args
= gfc_sym_get_dummy_args (proc
);
13975 if (stree
->n
.tb
->pass_arg
)
13977 gfc_formal_arglist
*i
;
13979 /* If an explicit passing argument name is given, walk the arg-list
13980 and look for it. */
13983 stree
->n
.tb
->pass_arg_num
= 1;
13984 for (i
= dummy_args
; i
; i
= i
->next
)
13986 if (!strcmp (i
->sym
->name
, stree
->n
.tb
->pass_arg
))
13991 ++stree
->n
.tb
->pass_arg_num
;
13996 gfc_error ("Procedure %qs with PASS(%s) at %L has no"
13998 proc
->name
, stree
->n
.tb
->pass_arg
, &where
,
13999 stree
->n
.tb
->pass_arg
);
14005 /* Otherwise, take the first one; there should in fact be at least
14007 stree
->n
.tb
->pass_arg_num
= 1;
14010 gfc_error ("Procedure %qs with PASS at %L must have at"
14011 " least one argument", proc
->name
, &where
);
14014 me_arg
= dummy_args
->sym
;
14017 /* Now check that the argument-type matches and the passed-object
14018 dummy argument is generally fine. */
14020 gcc_assert (me_arg
);
14022 if (me_arg
->ts
.type
!= BT_CLASS
)
14024 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
14025 " at %L", proc
->name
, &where
);
14029 if (CLASS_DATA (me_arg
)->ts
.u
.derived
14030 != resolve_bindings_derived
)
14032 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
14033 " the derived-type %qs", me_arg
->name
, proc
->name
,
14034 me_arg
->name
, &where
, resolve_bindings_derived
->name
);
14038 gcc_assert (me_arg
->ts
.type
== BT_CLASS
);
14039 if (CLASS_DATA (me_arg
)->as
&& CLASS_DATA (me_arg
)->as
->rank
!= 0)
14041 gfc_error ("Passed-object dummy argument of %qs at %L must be"
14042 " scalar", proc
->name
, &where
);
14045 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
14047 gfc_error ("Passed-object dummy argument of %qs at %L must not"
14048 " be ALLOCATABLE", proc
->name
, &where
);
14051 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
14053 gfc_error ("Passed-object dummy argument of %qs at %L must not"
14054 " be POINTER", proc
->name
, &where
);
14059 /* If we are extending some type, check that we don't override a procedure
14060 flagged NON_OVERRIDABLE. */
14061 stree
->n
.tb
->overridden
= NULL
;
14064 gfc_symtree
* overridden
;
14065 overridden
= gfc_find_typebound_proc (super_type
, NULL
,
14066 stree
->name
, true, NULL
);
14070 if (overridden
->n
.tb
)
14071 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
14073 if (!gfc_check_typebound_override (stree
, overridden
))
14078 /* See if there's a name collision with a component directly in this type. */
14079 for (comp
= resolve_bindings_derived
->components
; comp
; comp
= comp
->next
)
14080 if (!strcmp (comp
->name
, stree
->name
))
14082 gfc_error ("Procedure %qs at %L has the same name as a component of"
14084 stree
->name
, &where
, resolve_bindings_derived
->name
);
14088 /* Try to find a name collision with an inherited component. */
14089 if (super_type
&& gfc_find_component (super_type
, stree
->name
, true, true,
14092 gfc_error ("Procedure %qs at %L has the same name as an inherited"
14093 " component of %qs",
14094 stree
->name
, &where
, resolve_bindings_derived
->name
);
14098 stree
->n
.tb
->error
= 0;
14102 resolve_bindings_result
= false;
14103 stree
->n
.tb
->error
= 1;
14108 resolve_typebound_procedures (gfc_symbol
* derived
)
14111 gfc_symbol
* super_type
;
14113 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->tb_sym_root
)
14116 super_type
= gfc_get_derived_super_type (derived
);
14118 resolve_symbol (super_type
);
14120 resolve_bindings_derived
= derived
;
14121 resolve_bindings_result
= true;
14123 if (derived
->f2k_derived
->tb_sym_root
)
14124 gfc_traverse_symtree (derived
->f2k_derived
->tb_sym_root
,
14125 &resolve_typebound_procedure
);
14127 if (derived
->f2k_derived
->tb_uop_root
)
14128 gfc_traverse_symtree (derived
->f2k_derived
->tb_uop_root
,
14129 &resolve_typebound_user_op
);
14131 for (op
= 0; op
!= GFC_INTRINSIC_OPS
; ++op
)
14133 gfc_typebound_proc
* p
= derived
->f2k_derived
->tb_op
[op
];
14134 if (p
&& !resolve_typebound_intrinsic_op (derived
,
14135 (gfc_intrinsic_op
)op
, p
))
14136 resolve_bindings_result
= false;
14139 return resolve_bindings_result
;
14143 /* Add a derived type to the dt_list. The dt_list is used in trans-types.c
14144 to give all identical derived types the same backend_decl. */
14146 add_dt_to_dt_list (gfc_symbol
*derived
)
14148 if (!derived
->dt_next
)
14150 if (gfc_derived_types
)
14152 derived
->dt_next
= gfc_derived_types
->dt_next
;
14153 gfc_derived_types
->dt_next
= derived
;
14157 derived
->dt_next
= derived
;
14159 gfc_derived_types
= derived
;
14164 /* Ensure that a derived-type is really not abstract, meaning that every
14165 inherited DEFERRED binding is overridden by a non-DEFERRED one. */
14168 ensure_not_abstract_walker (gfc_symbol
* sub
, gfc_symtree
* st
)
14173 if (!ensure_not_abstract_walker (sub
, st
->left
))
14175 if (!ensure_not_abstract_walker (sub
, st
->right
))
14178 if (st
->n
.tb
&& st
->n
.tb
->deferred
)
14180 gfc_symtree
* overriding
;
14181 overriding
= gfc_find_typebound_proc (sub
, NULL
, st
->name
, true, NULL
);
14184 gcc_assert (overriding
->n
.tb
);
14185 if (overriding
->n
.tb
->deferred
)
14187 gfc_error ("Derived-type %qs declared at %L must be ABSTRACT because"
14188 " %qs is DEFERRED and not overridden",
14189 sub
->name
, &sub
->declared_at
, st
->name
);
14198 ensure_not_abstract (gfc_symbol
* sub
, gfc_symbol
* ancestor
)
14200 /* The algorithm used here is to recursively travel up the ancestry of sub
14201 and for each ancestor-type, check all bindings. If any of them is
14202 DEFERRED, look it up starting from sub and see if the found (overriding)
14203 binding is not DEFERRED.
14204 This is not the most efficient way to do this, but it should be ok and is
14205 clearer than something sophisticated. */
14207 gcc_assert (ancestor
&& !sub
->attr
.abstract
);
14209 if (!ancestor
->attr
.abstract
)
14212 /* Walk bindings of this ancestor. */
14213 if (ancestor
->f2k_derived
)
14216 t
= ensure_not_abstract_walker (sub
, ancestor
->f2k_derived
->tb_sym_root
);
14221 /* Find next ancestor type and recurse on it. */
14222 ancestor
= gfc_get_derived_super_type (ancestor
);
14224 return ensure_not_abstract (sub
, ancestor
);
14230 /* This check for typebound defined assignments is done recursively
14231 since the order in which derived types are resolved is not always in
14232 order of the declarations. */
14235 check_defined_assignments (gfc_symbol
*derived
)
14239 for (c
= derived
->components
; c
; c
= c
->next
)
14241 if (!gfc_bt_struct (c
->ts
.type
)
14243 || c
->attr
.allocatable
14244 || c
->attr
.proc_pointer_comp
14245 || c
->attr
.class_pointer
14246 || c
->attr
.proc_pointer
)
14249 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
14250 || (c
->ts
.u
.derived
->f2k_derived
14251 && c
->ts
.u
.derived
->f2k_derived
->tb_op
[INTRINSIC_ASSIGN
]))
14253 derived
->attr
.defined_assign_comp
= 1;
14257 check_defined_assignments (c
->ts
.u
.derived
);
14258 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
14260 derived
->attr
.defined_assign_comp
= 1;
14267 /* Resolve a single component of a derived type or structure. */
14270 resolve_component (gfc_component
*c
, gfc_symbol
*sym
)
14272 gfc_symbol
*super_type
;
14273 symbol_attribute
*attr
;
14275 if (c
->attr
.artificial
)
14278 /* Do not allow vtype components to be resolved in nameless namespaces
14279 such as block data because the procedure pointers will cause ICEs
14280 and vtables are not needed in these contexts. */
14281 if (sym
->attr
.vtype
&& sym
->attr
.use_assoc
14282 && sym
->ns
->proc_name
== NULL
)
14286 if ((!sym
->attr
.is_class
|| c
!= sym
->components
)
14287 && c
->attr
.codimension
14288 && (!c
->attr
.allocatable
|| (c
->as
&& c
->as
->type
!= AS_DEFERRED
)))
14290 gfc_error ("Coarray component %qs at %L must be allocatable with "
14291 "deferred shape", c
->name
, &c
->loc
);
14296 if (c
->attr
.codimension
&& c
->ts
.type
== BT_DERIVED
14297 && c
->ts
.u
.derived
->ts
.is_iso_c
)
14299 gfc_error ("Component %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
14300 "shall not be a coarray", c
->name
, &c
->loc
);
14305 if (gfc_bt_struct (c
->ts
.type
) && c
->ts
.u
.derived
->attr
.coarray_comp
14306 && (c
->attr
.codimension
|| c
->attr
.pointer
|| c
->attr
.dimension
14307 || c
->attr
.allocatable
))
14309 gfc_error ("Component %qs at %L with coarray component "
14310 "shall be a nonpointer, nonallocatable scalar",
14316 if (c
->ts
.type
== BT_CLASS
)
14318 if (CLASS_DATA (c
))
14320 attr
= &(CLASS_DATA (c
)->attr
);
14322 /* Fix up contiguous attribute. */
14323 if (c
->attr
.contiguous
)
14324 attr
->contiguous
= 1;
14332 if (attr
&& attr
->contiguous
&& (!attr
->dimension
|| !attr
->pointer
))
14334 gfc_error ("Component %qs at %L has the CONTIGUOUS attribute but "
14335 "is not an array pointer", c
->name
, &c
->loc
);
14339 /* F2003, 15.2.1 - length has to be one. */
14340 if (sym
->attr
.is_bind_c
&& c
->ts
.type
== BT_CHARACTER
14341 && (c
->ts
.u
.cl
== NULL
|| c
->ts
.u
.cl
->length
== NULL
14342 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
)
14343 || mpz_cmp_si (c
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
14345 gfc_error ("Component %qs of BIND(C) type at %L must have length one",
14350 if (c
->attr
.proc_pointer
&& c
->ts
.interface
)
14352 gfc_symbol
*ifc
= c
->ts
.interface
;
14354 if (!sym
->attr
.vtype
&& !check_proc_interface (ifc
, &c
->loc
))
14360 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
14362 /* Resolve interface and copy attributes. */
14363 if (ifc
->formal
&& !ifc
->formal_ns
)
14364 resolve_symbol (ifc
);
14365 if (ifc
->attr
.intrinsic
)
14366 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
14370 c
->ts
= ifc
->result
->ts
;
14371 c
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
14372 c
->attr
.pointer
= ifc
->result
->attr
.pointer
;
14373 c
->attr
.dimension
= ifc
->result
->attr
.dimension
;
14374 c
->as
= gfc_copy_array_spec (ifc
->result
->as
);
14375 c
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
14380 c
->attr
.allocatable
= ifc
->attr
.allocatable
;
14381 c
->attr
.pointer
= ifc
->attr
.pointer
;
14382 c
->attr
.dimension
= ifc
->attr
.dimension
;
14383 c
->as
= gfc_copy_array_spec (ifc
->as
);
14384 c
->attr
.class_ok
= ifc
->attr
.class_ok
;
14386 c
->ts
.interface
= ifc
;
14387 c
->attr
.function
= ifc
->attr
.function
;
14388 c
->attr
.subroutine
= ifc
->attr
.subroutine
;
14390 c
->attr
.pure
= ifc
->attr
.pure
;
14391 c
->attr
.elemental
= ifc
->attr
.elemental
;
14392 c
->attr
.recursive
= ifc
->attr
.recursive
;
14393 c
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
14394 c
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
14395 /* Copy char length. */
14396 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
14398 gfc_charlen
*cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
14399 if (cl
->length
&& !cl
->resolved
14400 && !gfc_resolve_expr (cl
->length
))
14409 else if (c
->attr
.proc_pointer
&& c
->ts
.type
== BT_UNKNOWN
)
14411 /* Since PPCs are not implicitly typed, a PPC without an explicit
14412 interface must be a subroutine. */
14413 gfc_add_subroutine (&c
->attr
, c
->name
, &c
->loc
);
14416 /* Procedure pointer components: Check PASS arg. */
14417 if (c
->attr
.proc_pointer
&& !c
->tb
->nopass
&& c
->tb
->pass_arg_num
== 0
14418 && !sym
->attr
.vtype
)
14420 gfc_symbol
* me_arg
;
14422 if (c
->tb
->pass_arg
)
14424 gfc_formal_arglist
* i
;
14426 /* If an explicit passing argument name is given, walk the arg-list
14427 and look for it. */
14430 c
->tb
->pass_arg_num
= 1;
14431 for (i
= c
->ts
.interface
->formal
; i
; i
= i
->next
)
14433 if (!strcmp (i
->sym
->name
, c
->tb
->pass_arg
))
14438 c
->tb
->pass_arg_num
++;
14443 gfc_error ("Procedure pointer component %qs with PASS(%s) "
14444 "at %L has no argument %qs", c
->name
,
14445 c
->tb
->pass_arg
, &c
->loc
, c
->tb
->pass_arg
);
14452 /* Otherwise, take the first one; there should in fact be at least
14454 c
->tb
->pass_arg_num
= 1;
14455 if (!c
->ts
.interface
->formal
)
14457 gfc_error ("Procedure pointer component %qs with PASS at %L "
14458 "must have at least one argument",
14463 me_arg
= c
->ts
.interface
->formal
->sym
;
14466 /* Now check that the argument-type matches. */
14467 gcc_assert (me_arg
);
14468 if ((me_arg
->ts
.type
!= BT_DERIVED
&& me_arg
->ts
.type
!= BT_CLASS
)
14469 || (me_arg
->ts
.type
== BT_DERIVED
&& me_arg
->ts
.u
.derived
!= sym
)
14470 || (me_arg
->ts
.type
== BT_CLASS
14471 && CLASS_DATA (me_arg
)->ts
.u
.derived
!= sym
))
14473 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
14474 " the derived type %qs", me_arg
->name
, c
->name
,
14475 me_arg
->name
, &c
->loc
, sym
->name
);
14480 /* Check for F03:C453. */
14481 if (CLASS_DATA (me_arg
)->attr
.dimension
)
14483 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14484 "must be scalar", me_arg
->name
, c
->name
, me_arg
->name
,
14490 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
14492 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14493 "may not have the POINTER attribute", me_arg
->name
,
14494 c
->name
, me_arg
->name
, &c
->loc
);
14499 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
14501 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14502 "may not be ALLOCATABLE", me_arg
->name
, c
->name
,
14503 me_arg
->name
, &c
->loc
);
14508 if (gfc_type_is_extensible (sym
) && me_arg
->ts
.type
!= BT_CLASS
)
14510 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
14511 " at %L", c
->name
, &c
->loc
);
14517 /* Check type-spec if this is not the parent-type component. */
14518 if (((sym
->attr
.is_class
14519 && (!sym
->components
->ts
.u
.derived
->attr
.extension
14520 || c
!= sym
->components
->ts
.u
.derived
->components
))
14521 || (!sym
->attr
.is_class
14522 && (!sym
->attr
.extension
|| c
!= sym
->components
)))
14523 && !sym
->attr
.vtype
14524 && !resolve_typespec_used (&c
->ts
, &c
->loc
, c
->name
))
14527 super_type
= gfc_get_derived_super_type (sym
);
14529 /* If this type is an extension, set the accessibility of the parent
14532 && ((sym
->attr
.is_class
14533 && c
== sym
->components
->ts
.u
.derived
->components
)
14534 || (!sym
->attr
.is_class
&& c
== sym
->components
))
14535 && strcmp (super_type
->name
, c
->name
) == 0)
14536 c
->attr
.access
= super_type
->attr
.access
;
14538 /* If this type is an extension, see if this component has the same name
14539 as an inherited type-bound procedure. */
14540 if (super_type
&& !sym
->attr
.is_class
14541 && gfc_find_typebound_proc (super_type
, NULL
, c
->name
, true, NULL
))
14543 gfc_error ("Component %qs of %qs at %L has the same name as an"
14544 " inherited type-bound procedure",
14545 c
->name
, sym
->name
, &c
->loc
);
14549 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.proc_pointer
14550 && !c
->ts
.deferred
)
14552 if (c
->ts
.u
.cl
->length
== NULL
14553 || (!resolve_charlen(c
->ts
.u
.cl
))
14554 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
))
14556 gfc_error ("Character length of component %qs needs to "
14557 "be a constant specification expression at %L",
14559 c
->ts
.u
.cl
->length
? &c
->ts
.u
.cl
->length
->where
: &c
->loc
);
14564 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.deferred
14565 && !c
->attr
.pointer
&& !c
->attr
.allocatable
)
14567 gfc_error ("Character component %qs of %qs at %L with deferred "
14568 "length must be a POINTER or ALLOCATABLE",
14569 c
->name
, sym
->name
, &c
->loc
);
14573 /* Add the hidden deferred length field. */
14574 if (c
->ts
.type
== BT_CHARACTER
14575 && (c
->ts
.deferred
|| c
->attr
.pdt_string
)
14576 && !c
->attr
.function
14577 && !sym
->attr
.is_class
)
14579 char name
[GFC_MAX_SYMBOL_LEN
+9];
14580 gfc_component
*strlen
;
14581 sprintf (name
, "_%s_length", c
->name
);
14582 strlen
= gfc_find_component (sym
, name
, true, true, NULL
);
14583 if (strlen
== NULL
)
14585 if (!gfc_add_component (sym
, name
, &strlen
))
14587 strlen
->ts
.type
= BT_INTEGER
;
14588 strlen
->ts
.kind
= gfc_charlen_int_kind
;
14589 strlen
->attr
.access
= ACCESS_PRIVATE
;
14590 strlen
->attr
.artificial
= 1;
14594 if (c
->ts
.type
== BT_DERIVED
14595 && sym
->component_access
!= ACCESS_PRIVATE
14596 && gfc_check_symbol_access (sym
)
14597 && !is_sym_host_assoc (c
->ts
.u
.derived
, sym
->ns
)
14598 && !c
->ts
.u
.derived
->attr
.use_assoc
14599 && !gfc_check_symbol_access (c
->ts
.u
.derived
)
14600 && !gfc_notify_std (GFC_STD_F2003
, "the component %qs is a "
14601 "PRIVATE type and cannot be a component of "
14602 "%qs, which is PUBLIC at %L", c
->name
,
14603 sym
->name
, &sym
->declared_at
))
14606 if ((sym
->attr
.sequence
|| sym
->attr
.is_bind_c
) && c
->ts
.type
== BT_CLASS
)
14608 gfc_error ("Polymorphic component %s at %L in SEQUENCE or BIND(C) "
14609 "type %s", c
->name
, &c
->loc
, sym
->name
);
14613 if (sym
->attr
.sequence
)
14615 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.sequence
== 0)
14617 gfc_error ("Component %s of SEQUENCE type declared at %L does "
14618 "not have the SEQUENCE attribute",
14619 c
->ts
.u
.derived
->name
, &sym
->declared_at
);
14624 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.generic
)
14625 c
->ts
.u
.derived
= gfc_find_dt_in_generic (c
->ts
.u
.derived
);
14626 else if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
14627 && CLASS_DATA (c
)->ts
.u
.derived
->attr
.generic
)
14628 CLASS_DATA (c
)->ts
.u
.derived
14629 = gfc_find_dt_in_generic (CLASS_DATA (c
)->ts
.u
.derived
);
14631 /* If an allocatable component derived type is of the same type as
14632 the enclosing derived type, we need a vtable generating so that
14633 the __deallocate procedure is created. */
14634 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
14635 && c
->ts
.u
.derived
== sym
&& c
->attr
.allocatable
== 1)
14636 gfc_find_vtab (&c
->ts
);
14638 /* Ensure that all the derived type components are put on the
14639 derived type list; even in formal namespaces, where derived type
14640 pointer components might not have been declared. */
14641 if (c
->ts
.type
== BT_DERIVED
14643 && c
->ts
.u
.derived
->components
14645 && sym
!= c
->ts
.u
.derived
)
14646 add_dt_to_dt_list (c
->ts
.u
.derived
);
14648 if (!gfc_resolve_array_spec (c
->as
,
14649 !(c
->attr
.pointer
|| c
->attr
.proc_pointer
14650 || c
->attr
.allocatable
)))
14653 if (c
->initializer
&& !sym
->attr
.vtype
14654 && !c
->attr
.pdt_kind
&& !c
->attr
.pdt_len
14655 && !gfc_check_assign_symbol (sym
, c
, c
->initializer
))
14662 /* Be nice about the locus for a structure expression - show the locus of the
14663 first non-null sub-expression if we can. */
14666 cons_where (gfc_expr
*struct_expr
)
14668 gfc_constructor
*cons
;
14670 gcc_assert (struct_expr
&& struct_expr
->expr_type
== EXPR_STRUCTURE
);
14672 cons
= gfc_constructor_first (struct_expr
->value
.constructor
);
14673 for (; cons
; cons
= gfc_constructor_next (cons
))
14675 if (cons
->expr
&& cons
->expr
->expr_type
!= EXPR_NULL
)
14676 return &cons
->expr
->where
;
14679 return &struct_expr
->where
;
14682 /* Resolve the components of a structure type. Much less work than derived
14686 resolve_fl_struct (gfc_symbol
*sym
)
14689 gfc_expr
*init
= NULL
;
14692 /* Make sure UNIONs do not have overlapping initializers. */
14693 if (sym
->attr
.flavor
== FL_UNION
)
14695 for (c
= sym
->components
; c
; c
= c
->next
)
14697 if (init
&& c
->initializer
)
14699 gfc_error ("Conflicting initializers in union at %L and %L",
14700 cons_where (init
), cons_where (c
->initializer
));
14701 gfc_free_expr (c
->initializer
);
14702 c
->initializer
= NULL
;
14705 init
= c
->initializer
;
14710 for (c
= sym
->components
; c
; c
= c
->next
)
14711 if (!resolve_component (c
, sym
))
14717 if (sym
->components
)
14718 add_dt_to_dt_list (sym
);
14724 /* Resolve the components of a derived type. This does not have to wait until
14725 resolution stage, but can be done as soon as the dt declaration has been
14729 resolve_fl_derived0 (gfc_symbol
*sym
)
14731 gfc_symbol
* super_type
;
14733 gfc_formal_arglist
*f
;
14736 if (sym
->attr
.unlimited_polymorphic
)
14739 super_type
= gfc_get_derived_super_type (sym
);
14742 if (super_type
&& sym
->attr
.coarray_comp
&& !super_type
->attr
.coarray_comp
)
14744 gfc_error ("As extending type %qs at %L has a coarray component, "
14745 "parent type %qs shall also have one", sym
->name
,
14746 &sym
->declared_at
, super_type
->name
);
14750 /* Ensure the extended type gets resolved before we do. */
14751 if (super_type
&& !resolve_fl_derived0 (super_type
))
14754 /* An ABSTRACT type must be extensible. */
14755 if (sym
->attr
.abstract
&& !gfc_type_is_extensible (sym
))
14757 gfc_error ("Non-extensible derived-type %qs at %L must not be ABSTRACT",
14758 sym
->name
, &sym
->declared_at
);
14762 c
= (sym
->attr
.is_class
) ? sym
->components
->ts
.u
.derived
->components
14766 for ( ; c
!= NULL
; c
= c
->next
)
14767 if (!resolve_component (c
, sym
))
14773 /* Now add the caf token field, where needed. */
14774 if (flag_coarray
!= GFC_FCOARRAY_NONE
14775 && !sym
->attr
.is_class
&& !sym
->attr
.vtype
)
14777 for (c
= sym
->components
; c
; c
= c
->next
)
14778 if (!c
->attr
.dimension
&& !c
->attr
.codimension
14779 && (c
->attr
.allocatable
|| c
->attr
.pointer
))
14781 char name
[GFC_MAX_SYMBOL_LEN
+9];
14782 gfc_component
*token
;
14783 sprintf (name
, "_caf_%s", c
->name
);
14784 token
= gfc_find_component (sym
, name
, true, true, NULL
);
14787 if (!gfc_add_component (sym
, name
, &token
))
14789 token
->ts
.type
= BT_VOID
;
14790 token
->ts
.kind
= gfc_default_integer_kind
;
14791 token
->attr
.access
= ACCESS_PRIVATE
;
14792 token
->attr
.artificial
= 1;
14793 token
->attr
.caf_token
= 1;
14798 check_defined_assignments (sym
);
14800 if (!sym
->attr
.defined_assign_comp
&& super_type
)
14801 sym
->attr
.defined_assign_comp
14802 = super_type
->attr
.defined_assign_comp
;
14804 /* If this is a non-ABSTRACT type extending an ABSTRACT one, ensure that
14805 all DEFERRED bindings are overridden. */
14806 if (super_type
&& super_type
->attr
.abstract
&& !sym
->attr
.abstract
14807 && !sym
->attr
.is_class
14808 && !ensure_not_abstract (sym
, super_type
))
14811 /* Check that there is a component for every PDT parameter. */
14812 if (sym
->attr
.pdt_template
)
14814 for (f
= sym
->formal
; f
; f
= f
->next
)
14818 c
= gfc_find_component (sym
, f
->sym
->name
, true, true, NULL
);
14821 gfc_error ("Parameterized type %qs does not have a component "
14822 "corresponding to parameter %qs at %L", sym
->name
,
14823 f
->sym
->name
, &sym
->declared_at
);
14829 /* Add derived type to the derived type list. */
14830 add_dt_to_dt_list (sym
);
14836 /* The following procedure does the full resolution of a derived type,
14837 including resolution of all type-bound procedures (if present). In contrast
14838 to 'resolve_fl_derived0' this can only be done after the module has been
14839 parsed completely. */
14842 resolve_fl_derived (gfc_symbol
*sym
)
14844 gfc_symbol
*gen_dt
= NULL
;
14846 if (sym
->attr
.unlimited_polymorphic
)
14849 if (!sym
->attr
.is_class
)
14850 gfc_find_symbol (sym
->name
, sym
->ns
, 0, &gen_dt
);
14851 if (gen_dt
&& gen_dt
->generic
&& gen_dt
->generic
->next
14852 && (!gen_dt
->generic
->sym
->attr
.use_assoc
14853 || gen_dt
->generic
->sym
->module
!= gen_dt
->generic
->next
->sym
->module
)
14854 && !gfc_notify_std (GFC_STD_F2003
, "Generic name %qs of function "
14855 "%qs at %L being the same name as derived "
14856 "type at %L", sym
->name
,
14857 gen_dt
->generic
->sym
== sym
14858 ? gen_dt
->generic
->next
->sym
->name
14859 : gen_dt
->generic
->sym
->name
,
14860 gen_dt
->generic
->sym
== sym
14861 ? &gen_dt
->generic
->next
->sym
->declared_at
14862 : &gen_dt
->generic
->sym
->declared_at
,
14863 &sym
->declared_at
))
14866 if (sym
->components
== NULL
&& !sym
->attr
.zero_comp
&& !sym
->attr
.use_assoc
)
14868 gfc_error ("Derived type %qs at %L has not been declared",
14869 sym
->name
, &sym
->declared_at
);
14873 /* Resolve the finalizer procedures. */
14874 if (!gfc_resolve_finalizers (sym
, NULL
))
14877 if (sym
->attr
.is_class
&& sym
->ts
.u
.derived
== NULL
)
14879 /* Fix up incomplete CLASS symbols. */
14880 gfc_component
*data
= gfc_find_component (sym
, "_data", true, true, NULL
);
14881 gfc_component
*vptr
= gfc_find_component (sym
, "_vptr", true, true, NULL
);
14883 /* Nothing more to do for unlimited polymorphic entities. */
14884 if (data
->ts
.u
.derived
->attr
.unlimited_polymorphic
)
14886 else if (vptr
->ts
.u
.derived
== NULL
)
14888 gfc_symbol
*vtab
= gfc_find_derived_vtab (data
->ts
.u
.derived
);
14890 vptr
->ts
.u
.derived
= vtab
->ts
.u
.derived
;
14891 if (!resolve_fl_derived0 (vptr
->ts
.u
.derived
))
14896 if (!resolve_fl_derived0 (sym
))
14899 /* Resolve the type-bound procedures. */
14900 if (!resolve_typebound_procedures (sym
))
14903 /* Generate module vtables subject to their accessibility and their not
14904 being vtables or pdt templates. If this is not done class declarations
14905 in external procedures wind up with their own version and so SELECT TYPE
14906 fails because the vptrs do not have the same address. */
14907 if (gfc_option
.allow_std
& GFC_STD_F2003
14908 && sym
->ns
->proc_name
14909 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14910 && sym
->attr
.access
!= ACCESS_PRIVATE
14911 && !(sym
->attr
.use_assoc
|| sym
->attr
.vtype
|| sym
->attr
.pdt_template
))
14913 gfc_symbol
*vtab
= gfc_find_derived_vtab (sym
);
14914 gfc_set_sym_referenced (vtab
);
14922 resolve_fl_namelist (gfc_symbol
*sym
)
14927 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14929 /* Check again, the check in match only works if NAMELIST comes
14931 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SIZE
)
14933 gfc_error ("Assumed size array %qs in namelist %qs at %L is not "
14934 "allowed", nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14938 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SHAPE
14939 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14940 "with assumed shape in namelist %qs at %L",
14941 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14944 if (is_non_constant_shape_array (nl
->sym
)
14945 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14946 "with nonconstant shape in namelist %qs at %L",
14947 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14950 if (nl
->sym
->ts
.type
== BT_CHARACTER
14951 && (nl
->sym
->ts
.u
.cl
->length
== NULL
14952 || !gfc_is_constant_expr (nl
->sym
->ts
.u
.cl
->length
))
14953 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs with "
14954 "nonconstant character length in "
14955 "namelist %qs at %L", nl
->sym
->name
,
14956 sym
->name
, &sym
->declared_at
))
14961 /* Reject PRIVATE objects in a PUBLIC namelist. */
14962 if (gfc_check_symbol_access (sym
))
14964 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14966 if (!nl
->sym
->attr
.use_assoc
14967 && !is_sym_host_assoc (nl
->sym
, sym
->ns
)
14968 && !gfc_check_symbol_access (nl
->sym
))
14970 gfc_error ("NAMELIST object %qs was declared PRIVATE and "
14971 "cannot be member of PUBLIC namelist %qs at %L",
14972 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14976 if (nl
->sym
->ts
.type
== BT_DERIVED
14977 && (nl
->sym
->ts
.u
.derived
->attr
.alloc_comp
14978 || nl
->sym
->ts
.u
.derived
->attr
.pointer_comp
))
14980 if (!gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs in "
14981 "namelist %qs at %L with ALLOCATABLE "
14982 "or POINTER components", nl
->sym
->name
,
14983 sym
->name
, &sym
->declared_at
))
14988 /* Types with private components that came here by USE-association. */
14989 if (nl
->sym
->ts
.type
== BT_DERIVED
14990 && derived_inaccessible (nl
->sym
->ts
.u
.derived
))
14992 gfc_error ("NAMELIST object %qs has use-associated PRIVATE "
14993 "components and cannot be member of namelist %qs at %L",
14994 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14998 /* Types with private components that are defined in the same module. */
14999 if (nl
->sym
->ts
.type
== BT_DERIVED
15000 && !is_sym_host_assoc (nl
->sym
->ts
.u
.derived
, sym
->ns
)
15001 && nl
->sym
->ts
.u
.derived
->attr
.private_comp
)
15003 gfc_error ("NAMELIST object %qs has PRIVATE components and "
15004 "cannot be a member of PUBLIC namelist %qs at %L",
15005 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
15012 /* 14.1.2 A module or internal procedure represent local entities
15013 of the same type as a namelist member and so are not allowed. */
15014 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
15016 if (nl
->sym
->ts
.kind
!= 0 && nl
->sym
->attr
.flavor
== FL_VARIABLE
)
15019 if (nl
->sym
->attr
.function
&& nl
->sym
== nl
->sym
->result
)
15020 if ((nl
->sym
== sym
->ns
->proc_name
)
15022 (sym
->ns
->parent
&& nl
->sym
== sym
->ns
->parent
->proc_name
))
15027 gfc_find_symbol (nl
->sym
->name
, sym
->ns
, 1, &nlsym
);
15028 if (nlsym
&& nlsym
->attr
.flavor
== FL_PROCEDURE
)
15030 gfc_error ("PROCEDURE attribute conflicts with NAMELIST "
15031 "attribute in %qs at %L", nlsym
->name
,
15032 &sym
->declared_at
);
15042 resolve_fl_parameter (gfc_symbol
*sym
)
15044 /* A parameter array's shape needs to be constant. */
15045 if (sym
->as
!= NULL
15046 && (sym
->as
->type
== AS_DEFERRED
15047 || is_non_constant_shape_array (sym
)))
15049 gfc_error ("Parameter array %qs at %L cannot be automatic "
15050 "or of deferred shape", sym
->name
, &sym
->declared_at
);
15054 /* Constraints on deferred type parameter. */
15055 if (!deferred_requirements (sym
))
15058 /* Make sure a parameter that has been implicitly typed still
15059 matches the implicit type, since PARAMETER statements can precede
15060 IMPLICIT statements. */
15061 if (sym
->attr
.implicit_type
15062 && !gfc_compare_types (&sym
->ts
, gfc_get_default_type (sym
->name
,
15065 gfc_error ("Implicitly typed PARAMETER %qs at %L doesn't match a "
15066 "later IMPLICIT type", sym
->name
, &sym
->declared_at
);
15070 /* Make sure the types of derived parameters are consistent. This
15071 type checking is deferred until resolution because the type may
15072 refer to a derived type from the host. */
15073 if (sym
->ts
.type
== BT_DERIVED
15074 && !gfc_compare_types (&sym
->ts
, &sym
->value
->ts
))
15076 gfc_error ("Incompatible derived type in PARAMETER at %L",
15077 &sym
->value
->where
);
15081 /* F03:C509,C514. */
15082 if (sym
->ts
.type
== BT_CLASS
)
15084 gfc_error ("CLASS variable %qs at %L cannot have the PARAMETER attribute",
15085 sym
->name
, &sym
->declared_at
);
15093 /* Called by resolve_symbol to check PDTs. */
15096 resolve_pdt (gfc_symbol
* sym
)
15098 gfc_symbol
*derived
= NULL
;
15099 gfc_actual_arglist
*param
;
15101 bool const_len_exprs
= true;
15102 bool assumed_len_exprs
= false;
15103 symbol_attribute
*attr
;
15105 if (sym
->ts
.type
== BT_DERIVED
)
15107 derived
= sym
->ts
.u
.derived
;
15108 attr
= &(sym
->attr
);
15110 else if (sym
->ts
.type
== BT_CLASS
)
15112 derived
= CLASS_DATA (sym
)->ts
.u
.derived
;
15113 attr
= &(CLASS_DATA (sym
)->attr
);
15116 gcc_unreachable ();
15118 gcc_assert (derived
->attr
.pdt_type
);
15120 for (param
= sym
->param_list
; param
; param
= param
->next
)
15122 c
= gfc_find_component (derived
, param
->name
, false, true, NULL
);
15124 if (c
->attr
.pdt_kind
)
15127 if (param
->expr
&& !gfc_is_constant_expr (param
->expr
)
15128 && c
->attr
.pdt_len
)
15129 const_len_exprs
= false;
15130 else if (param
->spec_type
== SPEC_ASSUMED
)
15131 assumed_len_exprs
= true;
15133 if (param
->spec_type
== SPEC_DEFERRED
15134 && !attr
->allocatable
&& !attr
->pointer
)
15135 gfc_error ("The object %qs at %L has a deferred LEN "
15136 "parameter %qs and is neither allocatable "
15137 "nor a pointer", sym
->name
, &sym
->declared_at
,
15142 if (!const_len_exprs
15143 && (sym
->ns
->proc_name
->attr
.is_main_program
15144 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15145 || sym
->attr
.save
!= SAVE_NONE
))
15146 gfc_error ("The AUTOMATIC object %qs at %L must not have the "
15147 "SAVE attribute or be a variable declared in the "
15148 "main program, a module or a submodule(F08/C513)",
15149 sym
->name
, &sym
->declared_at
);
15151 if (assumed_len_exprs
&& !(sym
->attr
.dummy
15152 || sym
->attr
.select_type_temporary
|| sym
->attr
.associate_var
))
15153 gfc_error ("The object %qs at %L with ASSUMED type parameters "
15154 "must be a dummy or a SELECT TYPE selector(F08/4.2)",
15155 sym
->name
, &sym
->declared_at
);
15159 /* Do anything necessary to resolve a symbol. Right now, we just
15160 assume that an otherwise unknown symbol is a variable. This sort
15161 of thing commonly happens for symbols in module. */
15164 resolve_symbol (gfc_symbol
*sym
)
15166 int check_constant
, mp_flag
;
15167 gfc_symtree
*symtree
;
15168 gfc_symtree
*this_symtree
;
15171 symbol_attribute class_attr
;
15172 gfc_array_spec
*as
;
15173 bool saved_specification_expr
;
15175 if (sym
->resolve_symbol_called
>= 1)
15177 sym
->resolve_symbol_called
= 1;
15179 /* No symbol will ever have union type; only components can be unions.
15180 Union type declaration symbols have type BT_UNKNOWN but flavor FL_UNION
15181 (just like derived type declaration symbols have flavor FL_DERIVED). */
15182 gcc_assert (sym
->ts
.type
!= BT_UNION
);
15184 /* Coarrayed polymorphic objects with allocatable or pointer components are
15185 yet unsupported for -fcoarray=lib. */
15186 if (flag_coarray
== GFC_FCOARRAY_LIB
&& sym
->ts
.type
== BT_CLASS
15187 && sym
->ts
.u
.derived
&& CLASS_DATA (sym
)
15188 && CLASS_DATA (sym
)->attr
.codimension
15189 && CLASS_DATA (sym
)->ts
.u
.derived
15190 && (CLASS_DATA (sym
)->ts
.u
.derived
->attr
.alloc_comp
15191 || CLASS_DATA (sym
)->ts
.u
.derived
->attr
.pointer_comp
))
15193 gfc_error ("Sorry, allocatable/pointer components in polymorphic (CLASS) "
15194 "type coarrays at %L are unsupported", &sym
->declared_at
);
15198 if (sym
->attr
.artificial
)
15201 if (sym
->attr
.unlimited_polymorphic
)
15204 if (sym
->attr
.flavor
== FL_UNKNOWN
15205 || (sym
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.intrinsic
15206 && !sym
->attr
.generic
&& !sym
->attr
.external
15207 && sym
->attr
.if_source
== IFSRC_UNKNOWN
15208 && sym
->ts
.type
== BT_UNKNOWN
))
15211 /* If we find that a flavorless symbol is an interface in one of the
15212 parent namespaces, find its symtree in this namespace, free the
15213 symbol and set the symtree to point to the interface symbol. */
15214 for (ns
= gfc_current_ns
->parent
; ns
; ns
= ns
->parent
)
15216 symtree
= gfc_find_symtree (ns
->sym_root
, sym
->name
);
15217 if (symtree
&& (symtree
->n
.sym
->generic
||
15218 (symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
15219 && sym
->ns
->construct_entities
)))
15221 this_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
15223 if (this_symtree
->n
.sym
== sym
)
15225 symtree
->n
.sym
->refs
++;
15226 gfc_release_symbol (sym
);
15227 this_symtree
->n
.sym
= symtree
->n
.sym
;
15233 /* Otherwise give it a flavor according to such attributes as
15235 if (sym
->attr
.flavor
== FL_UNKNOWN
&& sym
->attr
.external
== 0
15236 && sym
->attr
.intrinsic
== 0)
15237 sym
->attr
.flavor
= FL_VARIABLE
;
15238 else if (sym
->attr
.flavor
== FL_UNKNOWN
)
15240 sym
->attr
.flavor
= FL_PROCEDURE
;
15241 if (sym
->attr
.dimension
)
15242 sym
->attr
.function
= 1;
15246 if (sym
->attr
.external
&& sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.function
)
15247 gfc_add_function (&sym
->attr
, sym
->name
, &sym
->declared_at
);
15249 if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
15250 && !resolve_procedure_interface (sym
))
15253 if (sym
->attr
.is_protected
&& !sym
->attr
.proc_pointer
15254 && (sym
->attr
.procedure
|| sym
->attr
.external
))
15256 if (sym
->attr
.external
)
15257 gfc_error ("PROTECTED attribute conflicts with EXTERNAL attribute "
15258 "at %L", &sym
->declared_at
);
15260 gfc_error ("PROCEDURE attribute conflicts with PROTECTED attribute "
15261 "at %L", &sym
->declared_at
);
15266 if (sym
->attr
.flavor
== FL_DERIVED
&& !resolve_fl_derived (sym
))
15269 else if ((sym
->attr
.flavor
== FL_STRUCT
|| sym
->attr
.flavor
== FL_UNION
)
15270 && !resolve_fl_struct (sym
))
15273 /* Symbols that are module procedures with results (functions) have
15274 the types and array specification copied for type checking in
15275 procedures that call them, as well as for saving to a module
15276 file. These symbols can't stand the scrutiny that their results
15278 mp_flag
= (sym
->result
!= NULL
&& sym
->result
!= sym
);
15280 /* Make sure that the intrinsic is consistent with its internal
15281 representation. This needs to be done before assigning a default
15282 type to avoid spurious warnings. */
15283 if (sym
->attr
.flavor
!= FL_MODULE
&& sym
->attr
.intrinsic
15284 && !gfc_resolve_intrinsic (sym
, &sym
->declared_at
))
15287 /* Resolve associate names. */
15289 resolve_assoc_var (sym
, true);
15291 /* Assign default type to symbols that need one and don't have one. */
15292 if (sym
->ts
.type
== BT_UNKNOWN
)
15294 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
)
15296 gfc_set_default_type (sym
, 1, NULL
);
15299 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.external
15300 && !sym
->attr
.function
&& !sym
->attr
.subroutine
15301 && gfc_get_default_type (sym
->name
, sym
->ns
)->type
== BT_UNKNOWN
)
15302 gfc_add_subroutine (&sym
->attr
, sym
->name
, &sym
->declared_at
);
15304 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
15306 /* The specific case of an external procedure should emit an error
15307 in the case that there is no implicit type. */
15310 if (!sym
->attr
.mixed_entry_master
)
15311 gfc_set_default_type (sym
, sym
->attr
.external
, NULL
);
15315 /* Result may be in another namespace. */
15316 resolve_symbol (sym
->result
);
15318 if (!sym
->result
->attr
.proc_pointer
)
15320 sym
->ts
= sym
->result
->ts
;
15321 sym
->as
= gfc_copy_array_spec (sym
->result
->as
);
15322 sym
->attr
.dimension
= sym
->result
->attr
.dimension
;
15323 sym
->attr
.pointer
= sym
->result
->attr
.pointer
;
15324 sym
->attr
.allocatable
= sym
->result
->attr
.allocatable
;
15325 sym
->attr
.contiguous
= sym
->result
->attr
.contiguous
;
15330 else if (mp_flag
&& sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
15332 bool saved_specification_expr
= specification_expr
;
15333 specification_expr
= true;
15334 gfc_resolve_array_spec (sym
->result
->as
, false);
15335 specification_expr
= saved_specification_expr
;
15338 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
15340 as
= CLASS_DATA (sym
)->as
;
15341 class_attr
= CLASS_DATA (sym
)->attr
;
15342 class_attr
.pointer
= class_attr
.class_pointer
;
15346 class_attr
= sym
->attr
;
15351 if (sym
->attr
.contiguous
15352 && (!class_attr
.dimension
15353 || (as
->type
!= AS_ASSUMED_SHAPE
&& as
->type
!= AS_ASSUMED_RANK
15354 && !class_attr
.pointer
)))
15356 gfc_error ("%qs at %L has the CONTIGUOUS attribute but is not an "
15357 "array pointer or an assumed-shape or assumed-rank array",
15358 sym
->name
, &sym
->declared_at
);
15362 /* Assumed size arrays and assumed shape arrays must be dummy
15363 arguments. Array-spec's of implied-shape should have been resolved to
15364 AS_EXPLICIT already. */
15368 /* If AS_IMPLIED_SHAPE makes it to here, it must be a bad
15369 specification expression. */
15370 if (as
->type
== AS_IMPLIED_SHAPE
)
15373 for (i
=0; i
<as
->rank
; i
++)
15375 if (as
->lower
[i
] != NULL
&& as
->upper
[i
] == NULL
)
15377 gfc_error ("Bad specification for assumed size array at %L",
15378 &as
->lower
[i
]->where
);
15385 if (((as
->type
== AS_ASSUMED_SIZE
&& !as
->cp_was_assumed
)
15386 || as
->type
== AS_ASSUMED_SHAPE
)
15387 && !sym
->attr
.dummy
&& !sym
->attr
.select_type_temporary
)
15389 if (as
->type
== AS_ASSUMED_SIZE
)
15390 gfc_error ("Assumed size array at %L must be a dummy argument",
15391 &sym
->declared_at
);
15393 gfc_error ("Assumed shape array at %L must be a dummy argument",
15394 &sym
->declared_at
);
15397 /* TS 29113, C535a. */
15398 if (as
->type
== AS_ASSUMED_RANK
&& !sym
->attr
.dummy
15399 && !sym
->attr
.select_type_temporary
15400 && !(cs_base
&& cs_base
->current
15401 && cs_base
->current
->op
== EXEC_SELECT_RANK
))
15403 gfc_error ("Assumed-rank array at %L must be a dummy argument",
15404 &sym
->declared_at
);
15407 if (as
->type
== AS_ASSUMED_RANK
15408 && (sym
->attr
.codimension
|| sym
->attr
.value
))
15410 gfc_error ("Assumed-rank array at %L may not have the VALUE or "
15411 "CODIMENSION attribute", &sym
->declared_at
);
15416 /* Make sure symbols with known intent or optional are really dummy
15417 variable. Because of ENTRY statement, this has to be deferred
15418 until resolution time. */
15420 if (!sym
->attr
.dummy
15421 && (sym
->attr
.optional
|| sym
->attr
.intent
!= INTENT_UNKNOWN
))
15423 gfc_error ("Symbol at %L is not a DUMMY variable", &sym
->declared_at
);
15427 if (sym
->attr
.value
&& !sym
->attr
.dummy
)
15429 gfc_error ("%qs at %L cannot have the VALUE attribute because "
15430 "it is not a dummy argument", sym
->name
, &sym
->declared_at
);
15434 if (sym
->attr
.value
&& sym
->ts
.type
== BT_CHARACTER
)
15436 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
15437 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
15439 gfc_error ("Character dummy variable %qs at %L with VALUE "
15440 "attribute must have constant length",
15441 sym
->name
, &sym
->declared_at
);
15445 if (sym
->ts
.is_c_interop
15446 && mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
15448 gfc_error ("C interoperable character dummy variable %qs at %L "
15449 "with VALUE attribute must have length one",
15450 sym
->name
, &sym
->declared_at
);
15455 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15456 && sym
->ts
.u
.derived
->attr
.generic
)
15458 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
15459 if (!sym
->ts
.u
.derived
)
15461 gfc_error ("The derived type %qs at %L is of type %qs, "
15462 "which has not been defined", sym
->name
,
15463 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15464 sym
->ts
.type
= BT_UNKNOWN
;
15469 /* Use the same constraints as TYPE(*), except for the type check
15470 and that only scalars and assumed-size arrays are permitted. */
15471 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
15473 if (!sym
->attr
.dummy
)
15475 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
15476 "a dummy argument", sym
->name
, &sym
->declared_at
);
15480 if (sym
->ts
.type
!= BT_ASSUMED
&& sym
->ts
.type
!= BT_INTEGER
15481 && sym
->ts
.type
!= BT_REAL
&& sym
->ts
.type
!= BT_LOGICAL
15482 && sym
->ts
.type
!= BT_COMPLEX
)
15484 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
15485 "of type TYPE(*) or of an numeric intrinsic type",
15486 sym
->name
, &sym
->declared_at
);
15490 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
15491 || sym
->attr
.pointer
|| sym
->attr
.value
)
15493 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
15494 "have the ALLOCATABLE, CODIMENSION, POINTER or VALUE "
15495 "attribute", sym
->name
, &sym
->declared_at
);
15499 if (sym
->attr
.intent
== INTENT_OUT
)
15501 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
15502 "have the INTENT(OUT) attribute",
15503 sym
->name
, &sym
->declared_at
);
15506 if (sym
->attr
.dimension
&& sym
->as
->type
!= AS_ASSUMED_SIZE
)
15508 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall "
15509 "either be a scalar or an assumed-size array",
15510 sym
->name
, &sym
->declared_at
);
15514 /* Set the type to TYPE(*) and add a dimension(*) to ensure
15515 NO_ARG_CHECK is correctly handled in trans*.c, e.g. with
15517 sym
->ts
.type
= BT_ASSUMED
;
15518 sym
->as
= gfc_get_array_spec ();
15519 sym
->as
->type
= AS_ASSUMED_SIZE
;
15521 sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
15523 else if (sym
->ts
.type
== BT_ASSUMED
)
15525 /* TS 29113, C407a. */
15526 if (!sym
->attr
.dummy
)
15528 gfc_error ("Assumed type of variable %s at %L is only permitted "
15529 "for dummy variables", sym
->name
, &sym
->declared_at
);
15532 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
15533 || sym
->attr
.pointer
|| sym
->attr
.value
)
15535 gfc_error ("Assumed-type variable %s at %L may not have the "
15536 "ALLOCATABLE, CODIMENSION, POINTER or VALUE attribute",
15537 sym
->name
, &sym
->declared_at
);
15540 if (sym
->attr
.intent
== INTENT_OUT
)
15542 gfc_error ("Assumed-type variable %s at %L may not have the "
15543 "INTENT(OUT) attribute",
15544 sym
->name
, &sym
->declared_at
);
15547 if (sym
->attr
.dimension
&& sym
->as
->type
== AS_EXPLICIT
)
15549 gfc_error ("Assumed-type variable %s at %L shall not be an "
15550 "explicit-shape array", sym
->name
, &sym
->declared_at
);
15555 /* If the symbol is marked as bind(c), that it is declared at module level
15556 scope and verify its type and kind. Do not do the latter for symbols
15557 that are implicitly typed because that is handled in
15558 gfc_set_default_type. Handle dummy arguments and procedure definitions
15559 separately. Also, anything that is use associated is not handled here
15560 but instead is handled in the module it is declared in. Finally, derived
15561 type definitions are allowed to be BIND(C) since that only implies that
15562 they're interoperable, and they are checked fully for interoperability
15563 when a variable is declared of that type. */
15564 if (sym
->attr
.is_bind_c
&& sym
->attr
.use_assoc
== 0
15565 && sym
->attr
.dummy
== 0 && sym
->attr
.flavor
!= FL_PROCEDURE
15566 && sym
->attr
.flavor
!= FL_DERIVED
)
15570 /* First, make sure the variable is declared at the
15571 module-level scope (J3/04-007, Section 15.3). */
15572 if (sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
&&
15573 sym
->attr
.in_common
== 0)
15575 gfc_error ("Variable %qs at %L cannot be BIND(C) because it "
15576 "is neither a COMMON block nor declared at the "
15577 "module level scope", sym
->name
, &(sym
->declared_at
));
15580 else if (sym
->ts
.type
== BT_CHARACTER
15581 && (sym
->ts
.u
.cl
== NULL
|| sym
->ts
.u
.cl
->length
== NULL
15582 || !gfc_is_constant_expr (sym
->ts
.u
.cl
->length
)
15583 || mpz_cmp_si (sym
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
15585 gfc_error ("BIND(C) Variable %qs at %L must have length one",
15586 sym
->name
, &sym
->declared_at
);
15589 else if (sym
->common_head
!= NULL
&& sym
->attr
.implicit_type
== 0)
15591 t
= verify_com_block_vars_c_interop (sym
->common_head
);
15593 else if (sym
->attr
.implicit_type
== 0)
15595 /* If type() declaration, we need to verify that the components
15596 of the given type are all C interoperable, etc. */
15597 if (sym
->ts
.type
== BT_DERIVED
&&
15598 sym
->ts
.u
.derived
->attr
.is_c_interop
!= 1)
15600 /* Make sure the user marked the derived type as BIND(C). If
15601 not, call the verify routine. This could print an error
15602 for the derived type more than once if multiple variables
15603 of that type are declared. */
15604 if (sym
->ts
.u
.derived
->attr
.is_bind_c
!= 1)
15605 verify_bind_c_derived_type (sym
->ts
.u
.derived
);
15609 /* Verify the variable itself as C interoperable if it
15610 is BIND(C). It is not possible for this to succeed if
15611 the verify_bind_c_derived_type failed, so don't have to handle
15612 any error returned by verify_bind_c_derived_type. */
15613 t
= verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
15614 sym
->common_block
);
15619 /* clear the is_bind_c flag to prevent reporting errors more than
15620 once if something failed. */
15621 sym
->attr
.is_bind_c
= 0;
15626 /* If a derived type symbol has reached this point, without its
15627 type being declared, we have an error. Notice that most
15628 conditions that produce undefined derived types have already
15629 been dealt with. However, the likes of:
15630 implicit type(t) (t) ..... call foo (t) will get us here if
15631 the type is not declared in the scope of the implicit
15632 statement. Change the type to BT_UNKNOWN, both because it is so
15633 and to prevent an ICE. */
15634 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15635 && sym
->ts
.u
.derived
->components
== NULL
15636 && !sym
->ts
.u
.derived
->attr
.zero_comp
)
15638 gfc_error ("The derived type %qs at %L is of type %qs, "
15639 "which has not been defined", sym
->name
,
15640 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15641 sym
->ts
.type
= BT_UNKNOWN
;
15645 /* Make sure that the derived type has been resolved and that the
15646 derived type is visible in the symbol's namespace, if it is a
15647 module function and is not PRIVATE. */
15648 if (sym
->ts
.type
== BT_DERIVED
15649 && sym
->ts
.u
.derived
->attr
.use_assoc
15650 && sym
->ns
->proc_name
15651 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15652 && !resolve_fl_derived (sym
->ts
.u
.derived
))
15655 /* Unless the derived-type declaration is use associated, Fortran 95
15656 does not allow public entries of private derived types.
15657 See 4.4.1 (F95) and 4.5.1.1 (F2003); and related interpretation
15658 161 in 95-006r3. */
15659 if (sym
->ts
.type
== BT_DERIVED
15660 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15661 && !sym
->ts
.u
.derived
->attr
.use_assoc
15662 && gfc_check_symbol_access (sym
)
15663 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
15664 && !gfc_notify_std (GFC_STD_F2003
, "PUBLIC %s %qs at %L of PRIVATE "
15665 "derived type %qs",
15666 (sym
->attr
.flavor
== FL_PARAMETER
)
15667 ? "parameter" : "variable",
15668 sym
->name
, &sym
->declared_at
,
15669 sym
->ts
.u
.derived
->name
))
15672 /* F2008, C1302. */
15673 if (sym
->ts
.type
== BT_DERIVED
15674 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15675 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
15676 || sym
->ts
.u
.derived
->attr
.lock_comp
)
15677 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15679 gfc_error ("Variable %s at %L of type LOCK_TYPE or with subcomponent of "
15680 "type LOCK_TYPE must be a coarray", sym
->name
,
15681 &sym
->declared_at
);
15685 /* TS18508, C702/C703. */
15686 if (sym
->ts
.type
== BT_DERIVED
15687 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15688 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
15689 || sym
->ts
.u
.derived
->attr
.event_comp
)
15690 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15692 gfc_error ("Variable %s at %L of type EVENT_TYPE or with subcomponent of "
15693 "type EVENT_TYPE must be a coarray", sym
->name
,
15694 &sym
->declared_at
);
15698 /* An assumed-size array with INTENT(OUT) shall not be of a type for which
15699 default initialization is defined (5.1.2.4.4). */
15700 if (sym
->ts
.type
== BT_DERIVED
15702 && sym
->attr
.intent
== INTENT_OUT
15704 && sym
->as
->type
== AS_ASSUMED_SIZE
)
15706 for (c
= sym
->ts
.u
.derived
->components
; c
; c
= c
->next
)
15708 if (c
->initializer
)
15710 gfc_error ("The INTENT(OUT) dummy argument %qs at %L is "
15711 "ASSUMED SIZE and so cannot have a default initializer",
15712 sym
->name
, &sym
->declared_at
);
15719 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15720 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.lock_comp
)
15722 gfc_error ("Dummy argument %qs at %L of LOCK_TYPE shall not be "
15723 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15728 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15729 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.event_comp
)
15731 gfc_error ("Dummy argument %qs at %L of EVENT_TYPE shall not be "
15732 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15737 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15738 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15739 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15740 || class_attr
.codimension
)
15741 && (sym
->attr
.result
|| sym
->result
== sym
))
15743 gfc_error ("Function result %qs at %L shall not be a coarray or have "
15744 "a coarray component", sym
->name
, &sym
->declared_at
);
15749 if (sym
->attr
.codimension
&& sym
->ts
.type
== BT_DERIVED
15750 && sym
->ts
.u
.derived
->ts
.is_iso_c
)
15752 gfc_error ("Variable %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
15753 "shall not be a coarray", sym
->name
, &sym
->declared_at
);
15758 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15759 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15760 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15761 && (class_attr
.codimension
|| class_attr
.pointer
|| class_attr
.dimension
15762 || class_attr
.allocatable
))
15764 gfc_error ("Variable %qs at %L with coarray component shall be a "
15765 "nonpointer, nonallocatable scalar, which is not a coarray",
15766 sym
->name
, &sym
->declared_at
);
15770 /* F2008, C526. The function-result case was handled above. */
15771 if (class_attr
.codimension
15772 && !(class_attr
.allocatable
|| sym
->attr
.dummy
|| sym
->attr
.save
15773 || sym
->attr
.select_type_temporary
15774 || sym
->attr
.associate_var
15775 || (sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15776 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15777 || sym
->ns
->proc_name
->attr
.is_main_program
15778 || sym
->attr
.function
|| sym
->attr
.result
|| sym
->attr
.use_assoc
))
15780 gfc_error ("Variable %qs at %L is a coarray and is not ALLOCATABLE, SAVE "
15781 "nor a dummy argument", sym
->name
, &sym
->declared_at
);
15785 else if (class_attr
.codimension
&& !sym
->attr
.select_type_temporary
15786 && !class_attr
.allocatable
&& as
&& as
->cotype
== AS_DEFERRED
)
15788 gfc_error ("Coarray variable %qs at %L shall not have codimensions with "
15789 "deferred shape", sym
->name
, &sym
->declared_at
);
15792 else if (class_attr
.codimension
&& class_attr
.allocatable
&& as
15793 && (as
->cotype
!= AS_DEFERRED
|| as
->type
!= AS_DEFERRED
))
15795 gfc_error ("Allocatable coarray variable %qs at %L must have "
15796 "deferred shape", sym
->name
, &sym
->declared_at
);
15801 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15802 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15803 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15804 || (class_attr
.codimension
&& class_attr
.allocatable
))
15805 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
)
15807 gfc_error ("Variable %qs at %L is INTENT(OUT) and can thus not be an "
15808 "allocatable coarray or have coarray components",
15809 sym
->name
, &sym
->declared_at
);
15813 if (class_attr
.codimension
&& sym
->attr
.dummy
15814 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.is_bind_c
)
15816 gfc_error ("Coarray dummy variable %qs at %L not allowed in BIND(C) "
15817 "procedure %qs", sym
->name
, &sym
->declared_at
,
15818 sym
->ns
->proc_name
->name
);
15822 if (sym
->ts
.type
== BT_LOGICAL
15823 && ((sym
->attr
.function
&& sym
->attr
.is_bind_c
&& sym
->result
== sym
)
15824 || ((sym
->attr
.dummy
|| sym
->attr
.result
) && sym
->ns
->proc_name
15825 && sym
->ns
->proc_name
->attr
.is_bind_c
)))
15828 for (i
= 0; gfc_logical_kinds
[i
].kind
; i
++)
15829 if (gfc_logical_kinds
[i
].kind
== sym
->ts
.kind
)
15831 if (!gfc_logical_kinds
[i
].c_bool
&& sym
->attr
.dummy
15832 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL dummy argument %qs at "
15833 "%L with non-C_Bool kind in BIND(C) procedure "
15834 "%qs", sym
->name
, &sym
->declared_at
,
15835 sym
->ns
->proc_name
->name
))
15837 else if (!gfc_logical_kinds
[i
].c_bool
15838 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL result variable "
15839 "%qs at %L with non-C_Bool kind in "
15840 "BIND(C) procedure %qs", sym
->name
,
15842 sym
->attr
.function
? sym
->name
15843 : sym
->ns
->proc_name
->name
))
15847 switch (sym
->attr
.flavor
)
15850 if (!resolve_fl_variable (sym
, mp_flag
))
15855 if (sym
->formal
&& !sym
->formal_ns
)
15857 /* Check that none of the arguments are a namelist. */
15858 gfc_formal_arglist
*formal
= sym
->formal
;
15860 for (; formal
; formal
= formal
->next
)
15861 if (formal
->sym
&& formal
->sym
->attr
.flavor
== FL_NAMELIST
)
15863 gfc_error ("Namelist %qs cannot be an argument to "
15864 "subroutine or function at %L",
15865 formal
->sym
->name
, &sym
->declared_at
);
15870 if (!resolve_fl_procedure (sym
, mp_flag
))
15875 if (!resolve_fl_namelist (sym
))
15880 if (!resolve_fl_parameter (sym
))
15888 /* Resolve array specifier. Check as well some constraints
15889 on COMMON blocks. */
15891 check_constant
= sym
->attr
.in_common
&& !sym
->attr
.pointer
;
15893 /* Set the formal_arg_flag so that check_conflict will not throw
15894 an error for host associated variables in the specification
15895 expression for an array_valued function. */
15896 if ((sym
->attr
.function
|| sym
->attr
.result
) && sym
->as
)
15897 formal_arg_flag
= true;
15899 saved_specification_expr
= specification_expr
;
15900 specification_expr
= true;
15901 gfc_resolve_array_spec (sym
->as
, check_constant
);
15902 specification_expr
= saved_specification_expr
;
15904 formal_arg_flag
= false;
15906 /* Resolve formal namespaces. */
15907 if (sym
->formal_ns
&& sym
->formal_ns
!= gfc_current_ns
15908 && !sym
->attr
.contained
&& !sym
->attr
.intrinsic
)
15909 gfc_resolve (sym
->formal_ns
);
15911 /* Make sure the formal namespace is present. */
15912 if (sym
->formal
&& !sym
->formal_ns
)
15914 gfc_formal_arglist
*formal
= sym
->formal
;
15915 while (formal
&& !formal
->sym
)
15916 formal
= formal
->next
;
15920 sym
->formal_ns
= formal
->sym
->ns
;
15921 if (sym
->ns
!= formal
->sym
->ns
)
15922 sym
->formal_ns
->refs
++;
15926 /* Check threadprivate restrictions. */
15927 if (sym
->attr
.threadprivate
&& !sym
->attr
.save
15928 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15929 && (!sym
->attr
.in_common
15930 && sym
->module
== NULL
15931 && (sym
->ns
->proc_name
== NULL
15932 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15933 gfc_error ("Threadprivate at %L isn't SAVEd", &sym
->declared_at
);
15935 /* Check omp declare target restrictions. */
15936 if (sym
->attr
.omp_declare_target
15937 && sym
->attr
.flavor
== FL_VARIABLE
15939 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15940 && (!sym
->attr
.in_common
15941 && sym
->module
== NULL
15942 && (sym
->ns
->proc_name
== NULL
15943 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15944 gfc_error ("!$OMP DECLARE TARGET variable %qs at %L isn't SAVEd",
15945 sym
->name
, &sym
->declared_at
);
15947 /* If we have come this far we can apply default-initializers, as
15948 described in 14.7.5, to those variables that have not already
15949 been assigned one. */
15950 if (sym
->ts
.type
== BT_DERIVED
15952 && !sym
->attr
.allocatable
15953 && !sym
->attr
.alloc_comp
)
15955 symbol_attribute
*a
= &sym
->attr
;
15957 if ((!a
->save
&& !a
->dummy
&& !a
->pointer
15958 && !a
->in_common
&& !a
->use_assoc
15960 && !((a
->function
|| a
->result
)
15962 || sym
->ts
.u
.derived
->attr
.alloc_comp
15963 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15964 && !(a
->function
&& sym
!= sym
->result
))
15965 || (a
->dummy
&& a
->intent
== INTENT_OUT
&& !a
->pointer
))
15966 apply_default_init (sym
);
15967 else if (a
->function
&& sym
->result
&& a
->access
!= ACCESS_PRIVATE
15968 && (sym
->ts
.u
.derived
->attr
.alloc_comp
15969 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15970 /* Mark the result symbol to be referenced, when it has allocatable
15972 sym
->result
->attr
.referenced
= 1;
15975 if (sym
->ts
.type
== BT_CLASS
&& sym
->ns
== gfc_current_ns
15976 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
15977 && !CLASS_DATA (sym
)->attr
.class_pointer
15978 && !CLASS_DATA (sym
)->attr
.allocatable
)
15979 apply_default_init (sym
);
15981 /* If this symbol has a type-spec, check it. */
15982 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
15983 || (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
))
15984 if (!resolve_typespec_used (&sym
->ts
, &sym
->declared_at
, sym
->name
))
15987 if (sym
->param_list
)
15992 /************* Resolve DATA statements *************/
15996 gfc_data_value
*vnode
;
16002 /* Advance the values structure to point to the next value in the data list. */
16005 next_data_value (void)
16007 while (mpz_cmp_ui (values
.left
, 0) == 0)
16010 if (values
.vnode
->next
== NULL
)
16013 values
.vnode
= values
.vnode
->next
;
16014 mpz_set (values
.left
, values
.vnode
->repeat
);
16022 check_data_variable (gfc_data_variable
*var
, locus
*where
)
16028 ar_type mark
= AR_UNKNOWN
;
16030 mpz_t section_index
[GFC_MAX_DIMENSIONS
];
16036 if (!gfc_resolve_expr (var
->expr
))
16040 mpz_init_set_si (offset
, 0);
16043 if (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
16044 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
16045 e
= e
->value
.function
.actual
->expr
;
16047 if (e
->expr_type
!= EXPR_VARIABLE
)
16049 gfc_error ("Expecting definable entity near %L", where
);
16053 sym
= e
->symtree
->n
.sym
;
16055 if (sym
->ns
->is_block_data
&& !sym
->attr
.in_common
)
16057 gfc_error ("BLOCK DATA element %qs at %L must be in COMMON",
16058 sym
->name
, &sym
->declared_at
);
16062 if (e
->ref
== NULL
&& sym
->as
)
16064 gfc_error ("DATA array %qs at %L must be specified in a previous"
16065 " declaration", sym
->name
, where
);
16069 if (gfc_is_coindexed (e
))
16071 gfc_error ("DATA element %qs at %L cannot have a coindex", sym
->name
,
16076 has_pointer
= sym
->attr
.pointer
;
16078 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
16080 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.pointer
)
16085 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.type
!= AR_FULL
)
16087 gfc_error ("DATA element %qs at %L is a pointer and so must "
16088 "be a full array", sym
->name
, where
);
16092 if (values
.vnode
->expr
->expr_type
== EXPR_CONSTANT
)
16094 gfc_error ("DATA object near %L has the pointer attribute "
16095 "and the corresponding DATA value is not a valid "
16096 "initial-data-target", where
);
16102 if (e
->rank
== 0 || has_pointer
)
16104 mpz_init_set_ui (size
, 1);
16111 /* Find the array section reference. */
16112 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
16114 if (ref
->type
!= REF_ARRAY
)
16116 if (ref
->u
.ar
.type
== AR_ELEMENT
)
16122 /* Set marks according to the reference pattern. */
16123 switch (ref
->u
.ar
.type
)
16131 /* Get the start position of array section. */
16132 gfc_get_section_index (ar
, section_index
, &offset
);
16137 gcc_unreachable ();
16140 if (!gfc_array_size (e
, &size
))
16142 gfc_error ("Nonconstant array section at %L in DATA statement",
16144 mpz_clear (offset
);
16151 while (mpz_cmp_ui (size
, 0) > 0)
16153 if (!next_data_value ())
16155 gfc_error ("DATA statement at %L has more variables than values",
16161 t
= gfc_check_assign (var
->expr
, values
.vnode
->expr
, 0);
16165 /* If we have more than one element left in the repeat count,
16166 and we have more than one element left in the target variable,
16167 then create a range assignment. */
16168 /* FIXME: Only done for full arrays for now, since array sections
16170 if (mark
== AR_FULL
&& ref
&& ref
->next
== NULL
16171 && mpz_cmp_ui (values
.left
, 1) > 0 && mpz_cmp_ui (size
, 1) > 0)
16175 if (mpz_cmp (size
, values
.left
) >= 0)
16177 mpz_init_set (range
, values
.left
);
16178 mpz_sub (size
, size
, values
.left
);
16179 mpz_set_ui (values
.left
, 0);
16183 mpz_init_set (range
, size
);
16184 mpz_sub (values
.left
, values
.left
, size
);
16185 mpz_set_ui (size
, 0);
16188 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
16191 mpz_add (offset
, offset
, range
);
16198 /* Assign initial value to symbol. */
16201 mpz_sub_ui (values
.left
, values
.left
, 1);
16202 mpz_sub_ui (size
, size
, 1);
16204 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
16209 if (mark
== AR_FULL
)
16210 mpz_add_ui (offset
, offset
, 1);
16212 /* Modify the array section indexes and recalculate the offset
16213 for next element. */
16214 else if (mark
== AR_SECTION
)
16215 gfc_advance_section (section_index
, ar
, &offset
);
16219 if (mark
== AR_SECTION
)
16221 for (i
= 0; i
< ar
->dimen
; i
++)
16222 mpz_clear (section_index
[i
]);
16226 mpz_clear (offset
);
16232 static bool traverse_data_var (gfc_data_variable
*, locus
*);
16234 /* Iterate over a list of elements in a DATA statement. */
16237 traverse_data_list (gfc_data_variable
*var
, locus
*where
)
16240 iterator_stack frame
;
16241 gfc_expr
*e
, *start
, *end
, *step
;
16242 bool retval
= true;
16244 mpz_init (frame
.value
);
16247 start
= gfc_copy_expr (var
->iter
.start
);
16248 end
= gfc_copy_expr (var
->iter
.end
);
16249 step
= gfc_copy_expr (var
->iter
.step
);
16251 if (!gfc_simplify_expr (start
, 1)
16252 || start
->expr_type
!= EXPR_CONSTANT
)
16254 gfc_error ("start of implied-do loop at %L could not be "
16255 "simplified to a constant value", &start
->where
);
16259 if (!gfc_simplify_expr (end
, 1)
16260 || end
->expr_type
!= EXPR_CONSTANT
)
16262 gfc_error ("end of implied-do loop at %L could not be "
16263 "simplified to a constant value", &start
->where
);
16267 if (!gfc_simplify_expr (step
, 1)
16268 || step
->expr_type
!= EXPR_CONSTANT
)
16270 gfc_error ("step of implied-do loop at %L could not be "
16271 "simplified to a constant value", &start
->where
);
16276 mpz_set (trip
, end
->value
.integer
);
16277 mpz_sub (trip
, trip
, start
->value
.integer
);
16278 mpz_add (trip
, trip
, step
->value
.integer
);
16280 mpz_div (trip
, trip
, step
->value
.integer
);
16282 mpz_set (frame
.value
, start
->value
.integer
);
16284 frame
.prev
= iter_stack
;
16285 frame
.variable
= var
->iter
.var
->symtree
;
16286 iter_stack
= &frame
;
16288 while (mpz_cmp_ui (trip
, 0) > 0)
16290 if (!traverse_data_var (var
->list
, where
))
16296 e
= gfc_copy_expr (var
->expr
);
16297 if (!gfc_simplify_expr (e
, 1))
16304 mpz_add (frame
.value
, frame
.value
, step
->value
.integer
);
16306 mpz_sub_ui (trip
, trip
, 1);
16310 mpz_clear (frame
.value
);
16313 gfc_free_expr (start
);
16314 gfc_free_expr (end
);
16315 gfc_free_expr (step
);
16317 iter_stack
= frame
.prev
;
16322 /* Type resolve variables in the variable list of a DATA statement. */
16325 traverse_data_var (gfc_data_variable
*var
, locus
*where
)
16329 for (; var
; var
= var
->next
)
16331 if (var
->expr
== NULL
)
16332 t
= traverse_data_list (var
, where
);
16334 t
= check_data_variable (var
, where
);
16344 /* Resolve the expressions and iterators associated with a data statement.
16345 This is separate from the assignment checking because data lists should
16346 only be resolved once. */
16349 resolve_data_variables (gfc_data_variable
*d
)
16351 for (; d
; d
= d
->next
)
16353 if (d
->list
== NULL
)
16355 if (!gfc_resolve_expr (d
->expr
))
16360 if (!gfc_resolve_iterator (&d
->iter
, false, true))
16363 if (!resolve_data_variables (d
->list
))
16372 /* Resolve a single DATA statement. We implement this by storing a pointer to
16373 the value list into static variables, and then recursively traversing the
16374 variables list, expanding iterators and such. */
16377 resolve_data (gfc_data
*d
)
16380 if (!resolve_data_variables (d
->var
))
16383 values
.vnode
= d
->value
;
16384 if (d
->value
== NULL
)
16385 mpz_set_ui (values
.left
, 0);
16387 mpz_set (values
.left
, d
->value
->repeat
);
16389 if (!traverse_data_var (d
->var
, &d
->where
))
16392 /* At this point, we better not have any values left. */
16394 if (next_data_value ())
16395 gfc_error ("DATA statement at %L has more values than variables",
16400 /* 12.6 Constraint: In a pure subprogram any variable which is in common or
16401 accessed by host or use association, is a dummy argument to a pure function,
16402 is a dummy argument with INTENT (IN) to a pure subroutine, or an object that
16403 is storage associated with any such variable, shall not be used in the
16404 following contexts: (clients of this function). */
16406 /* Determines if a variable is not 'pure', i.e., not assignable within a pure
16407 procedure. Returns zero if assignment is OK, nonzero if there is a
16410 gfc_impure_variable (gfc_symbol
*sym
)
16415 if (sym
->attr
.use_assoc
|| sym
->attr
.in_common
)
16418 /* Check if the symbol's ns is inside the pure procedure. */
16419 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16423 if (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.function
)
16427 proc
= sym
->ns
->proc_name
;
16428 if (sym
->attr
.dummy
16429 && ((proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_IN
)
16430 || proc
->attr
.function
))
16433 /* TODO: Sort out what can be storage associated, if anything, and include
16434 it here. In principle equivalences should be scanned but it does not
16435 seem to be possible to storage associate an impure variable this way. */
16440 /* Test whether a symbol is pure or not. For a NULL pointer, checks if the
16441 current namespace is inside a pure procedure. */
16444 gfc_pure (gfc_symbol
*sym
)
16446 symbol_attribute attr
;
16451 /* Check if the current namespace or one of its parents
16452 belongs to a pure procedure. */
16453 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16455 sym
= ns
->proc_name
;
16459 if (attr
.flavor
== FL_PROCEDURE
&& attr
.pure
)
16467 return attr
.flavor
== FL_PROCEDURE
&& attr
.pure
;
16471 /* Test whether a symbol is implicitly pure or not. For a NULL pointer,
16472 checks if the current namespace is implicitly pure. Note that this
16473 function returns false for a PURE procedure. */
16476 gfc_implicit_pure (gfc_symbol
*sym
)
16482 /* Check if the current procedure is implicit_pure. Walk up
16483 the procedure list until we find a procedure. */
16484 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16486 sym
= ns
->proc_name
;
16490 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16495 return sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.implicit_pure
16496 && !sym
->attr
.pure
;
16501 gfc_unset_implicit_pure (gfc_symbol
*sym
)
16507 /* Check if the current procedure is implicit_pure. Walk up
16508 the procedure list until we find a procedure. */
16509 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16511 sym
= ns
->proc_name
;
16515 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16520 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16521 sym
->attr
.implicit_pure
= 0;
16523 sym
->attr
.pure
= 0;
16527 /* Test whether the current procedure is elemental or not. */
16530 gfc_elemental (gfc_symbol
*sym
)
16532 symbol_attribute attr
;
16535 sym
= gfc_current_ns
->proc_name
;
16540 return attr
.flavor
== FL_PROCEDURE
&& attr
.elemental
;
16544 /* Warn about unused labels. */
16547 warn_unused_fortran_label (gfc_st_label
*label
)
16552 warn_unused_fortran_label (label
->left
);
16554 if (label
->defined
== ST_LABEL_UNKNOWN
)
16557 switch (label
->referenced
)
16559 case ST_LABEL_UNKNOWN
:
16560 gfc_warning (OPT_Wunused_label
, "Label %d at %L defined but not used",
16561 label
->value
, &label
->where
);
16564 case ST_LABEL_BAD_TARGET
:
16565 gfc_warning (OPT_Wunused_label
,
16566 "Label %d at %L defined but cannot be used",
16567 label
->value
, &label
->where
);
16574 warn_unused_fortran_label (label
->right
);
16578 /* Returns the sequence type of a symbol or sequence. */
16581 sequence_type (gfc_typespec ts
)
16590 if (ts
.u
.derived
->components
== NULL
)
16591 return SEQ_NONDEFAULT
;
16593 result
= sequence_type (ts
.u
.derived
->components
->ts
);
16594 for (c
= ts
.u
.derived
->components
->next
; c
; c
= c
->next
)
16595 if (sequence_type (c
->ts
) != result
)
16601 if (ts
.kind
!= gfc_default_character_kind
)
16602 return SEQ_NONDEFAULT
;
16604 return SEQ_CHARACTER
;
16607 if (ts
.kind
!= gfc_default_integer_kind
)
16608 return SEQ_NONDEFAULT
;
16610 return SEQ_NUMERIC
;
16613 if (!(ts
.kind
== gfc_default_real_kind
16614 || ts
.kind
== gfc_default_double_kind
))
16615 return SEQ_NONDEFAULT
;
16617 return SEQ_NUMERIC
;
16620 if (ts
.kind
!= gfc_default_complex_kind
)
16621 return SEQ_NONDEFAULT
;
16623 return SEQ_NUMERIC
;
16626 if (ts
.kind
!= gfc_default_logical_kind
)
16627 return SEQ_NONDEFAULT
;
16629 return SEQ_NUMERIC
;
16632 return SEQ_NONDEFAULT
;
16637 /* Resolve derived type EQUIVALENCE object. */
16640 resolve_equivalence_derived (gfc_symbol
*derived
, gfc_symbol
*sym
, gfc_expr
*e
)
16642 gfc_component
*c
= derived
->components
;
16647 /* Shall not be an object of nonsequence derived type. */
16648 if (!derived
->attr
.sequence
)
16650 gfc_error ("Derived type variable %qs at %L must have SEQUENCE "
16651 "attribute to be an EQUIVALENCE object", sym
->name
,
16656 /* Shall not have allocatable components. */
16657 if (derived
->attr
.alloc_comp
)
16659 gfc_error ("Derived type variable %qs at %L cannot have ALLOCATABLE "
16660 "components to be an EQUIVALENCE object",sym
->name
,
16665 if (sym
->attr
.in_common
&& gfc_has_default_initializer (sym
->ts
.u
.derived
))
16667 gfc_error ("Derived type variable %qs at %L with default "
16668 "initialization cannot be in EQUIVALENCE with a variable "
16669 "in COMMON", sym
->name
, &e
->where
);
16673 for (; c
; c
= c
->next
)
16675 if (gfc_bt_struct (c
->ts
.type
)
16676 && (!resolve_equivalence_derived(c
->ts
.u
.derived
, sym
, e
)))
16679 /* Shall not be an object of sequence derived type containing a pointer
16680 in the structure. */
16681 if (c
->attr
.pointer
)
16683 gfc_error ("Derived type variable %qs at %L with pointer "
16684 "component(s) cannot be an EQUIVALENCE object",
16685 sym
->name
, &e
->where
);
16693 /* Resolve equivalence object.
16694 An EQUIVALENCE object shall not be a dummy argument, a pointer, a target,
16695 an allocatable array, an object of nonsequence derived type, an object of
16696 sequence derived type containing a pointer at any level of component
16697 selection, an automatic object, a function name, an entry name, a result
16698 name, a named constant, a structure component, or a subobject of any of
16699 the preceding objects. A substring shall not have length zero. A
16700 derived type shall not have components with default initialization nor
16701 shall two objects of an equivalence group be initialized.
16702 Either all or none of the objects shall have an protected attribute.
16703 The simple constraints are done in symbol.c(check_conflict) and the rest
16704 are implemented here. */
16707 resolve_equivalence (gfc_equiv
*eq
)
16710 gfc_symbol
*first_sym
;
16713 locus
*last_where
= NULL
;
16714 seq_type eq_type
, last_eq_type
;
16715 gfc_typespec
*last_ts
;
16716 int object
, cnt_protected
;
16719 last_ts
= &eq
->expr
->symtree
->n
.sym
->ts
;
16721 first_sym
= eq
->expr
->symtree
->n
.sym
;
16725 for (object
= 1; eq
; eq
= eq
->eq
, object
++)
16729 e
->ts
= e
->symtree
->n
.sym
->ts
;
16730 /* match_varspec might not know yet if it is seeing
16731 array reference or substring reference, as it doesn't
16733 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
)
16735 gfc_ref
*ref
= e
->ref
;
16736 sym
= e
->symtree
->n
.sym
;
16738 if (sym
->attr
.dimension
)
16740 ref
->u
.ar
.as
= sym
->as
;
16744 /* For substrings, convert REF_ARRAY into REF_SUBSTRING. */
16745 if (e
->ts
.type
== BT_CHARACTER
16747 && ref
->type
== REF_ARRAY
16748 && ref
->u
.ar
.dimen
== 1
16749 && ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
16750 && ref
->u
.ar
.stride
[0] == NULL
)
16752 gfc_expr
*start
= ref
->u
.ar
.start
[0];
16753 gfc_expr
*end
= ref
->u
.ar
.end
[0];
16756 /* Optimize away the (:) reference. */
16757 if (start
== NULL
&& end
== NULL
)
16760 e
->ref
= ref
->next
;
16762 e
->ref
->next
= ref
->next
;
16767 ref
->type
= REF_SUBSTRING
;
16769 start
= gfc_get_int_expr (gfc_charlen_int_kind
,
16771 ref
->u
.ss
.start
= start
;
16772 if (end
== NULL
&& e
->ts
.u
.cl
)
16773 end
= gfc_copy_expr (e
->ts
.u
.cl
->length
);
16774 ref
->u
.ss
.end
= end
;
16775 ref
->u
.ss
.length
= e
->ts
.u
.cl
;
16782 /* Any further ref is an error. */
16785 gcc_assert (ref
->type
== REF_ARRAY
);
16786 gfc_error ("Syntax error in EQUIVALENCE statement at %L",
16792 if (!gfc_resolve_expr (e
))
16795 sym
= e
->symtree
->n
.sym
;
16797 if (sym
->attr
.is_protected
)
16799 if (cnt_protected
> 0 && cnt_protected
!= object
)
16801 gfc_error ("Either all or none of the objects in the "
16802 "EQUIVALENCE set at %L shall have the "
16803 "PROTECTED attribute",
16808 /* Shall not equivalence common block variables in a PURE procedure. */
16809 if (sym
->ns
->proc_name
16810 && sym
->ns
->proc_name
->attr
.pure
16811 && sym
->attr
.in_common
)
16813 /* Need to check for symbols that may have entered the pure
16814 procedure via a USE statement. */
16815 bool saw_sym
= false;
16816 if (sym
->ns
->use_stmts
)
16819 for (r
= sym
->ns
->use_stmts
->rename
; r
; r
= r
->next
)
16820 if (strcmp(r
->use_name
, sym
->name
) == 0) saw_sym
= true;
16826 gfc_error ("COMMON block member %qs at %L cannot be an "
16827 "EQUIVALENCE object in the pure procedure %qs",
16828 sym
->name
, &e
->where
, sym
->ns
->proc_name
->name
);
16832 /* Shall not be a named constant. */
16833 if (e
->expr_type
== EXPR_CONSTANT
)
16835 gfc_error ("Named constant %qs at %L cannot be an EQUIVALENCE "
16836 "object", sym
->name
, &e
->where
);
16840 if (e
->ts
.type
== BT_DERIVED
16841 && !resolve_equivalence_derived (e
->ts
.u
.derived
, sym
, e
))
16844 /* Check that the types correspond correctly:
16846 A numeric sequence structure may be equivalenced to another sequence
16847 structure, an object of default integer type, default real type, double
16848 precision real type, default logical type such that components of the
16849 structure ultimately only become associated to objects of the same
16850 kind. A character sequence structure may be equivalenced to an object
16851 of default character kind or another character sequence structure.
16852 Other objects may be equivalenced only to objects of the same type and
16853 kind parameters. */
16855 /* Identical types are unconditionally OK. */
16856 if (object
== 1 || gfc_compare_types (last_ts
, &sym
->ts
))
16857 goto identical_types
;
16859 last_eq_type
= sequence_type (*last_ts
);
16860 eq_type
= sequence_type (sym
->ts
);
16862 /* Since the pair of objects is not of the same type, mixed or
16863 non-default sequences can be rejected. */
16865 msg
= "Sequence %s with mixed components in EQUIVALENCE "
16866 "statement at %L with different type objects";
16868 && last_eq_type
== SEQ_MIXED
16869 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16870 || (eq_type
== SEQ_MIXED
16871 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16874 msg
= "Non-default type object or sequence %s in EQUIVALENCE "
16875 "statement at %L with objects of different type";
16877 && last_eq_type
== SEQ_NONDEFAULT
16878 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16879 || (eq_type
== SEQ_NONDEFAULT
16880 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16883 msg
="Non-CHARACTER object %qs in default CHARACTER "
16884 "EQUIVALENCE statement at %L";
16885 if (last_eq_type
== SEQ_CHARACTER
16886 && eq_type
!= SEQ_CHARACTER
16887 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16890 msg
="Non-NUMERIC object %qs in default NUMERIC "
16891 "EQUIVALENCE statement at %L";
16892 if (last_eq_type
== SEQ_NUMERIC
16893 && eq_type
!= SEQ_NUMERIC
16894 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16900 last_where
= &e
->where
;
16905 /* Shall not be an automatic array. */
16906 if (e
->ref
->type
== REF_ARRAY
&& is_non_constant_shape_array (sym
))
16908 gfc_error ("Array %qs at %L with non-constant bounds cannot be "
16909 "an EQUIVALENCE object", sym
->name
, &e
->where
);
16916 /* Shall not be a structure component. */
16917 if (r
->type
== REF_COMPONENT
)
16919 gfc_error ("Structure component %qs at %L cannot be an "
16920 "EQUIVALENCE object",
16921 r
->u
.c
.component
->name
, &e
->where
);
16925 /* A substring shall not have length zero. */
16926 if (r
->type
== REF_SUBSTRING
)
16928 if (compare_bound (r
->u
.ss
.start
, r
->u
.ss
.end
) == CMP_GT
)
16930 gfc_error ("Substring at %L has length zero",
16931 &r
->u
.ss
.start
->where
);
16941 /* Function called by resolve_fntype to flag other symbols used in the
16942 length type parameter specification of function results. */
16945 flag_fn_result_spec (gfc_expr
*expr
,
16947 int *f ATTRIBUTE_UNUSED
)
16952 if (expr
->expr_type
== EXPR_VARIABLE
)
16954 s
= expr
->symtree
->n
.sym
;
16955 for (ns
= s
->ns
; ns
; ns
= ns
->parent
)
16961 gfc_error ("Self reference in character length expression "
16962 "for %qs at %L", sym
->name
, &expr
->where
);
16966 if (!s
->fn_result_spec
16967 && s
->attr
.flavor
== FL_PARAMETER
)
16969 /* Function contained in a module.... */
16970 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_MODULE
)
16973 s
->fn_result_spec
= 1;
16974 /* Make sure that this symbol is translated as a module
16976 st
= gfc_get_unique_symtree (ns
);
16980 /* ... which is use associated and called. */
16981 else if (s
->attr
.use_assoc
|| s
->attr
.used_in_submodule
16983 /* External function matched with an interface. */
16986 && s
->ns
->proc_name
->attr
.if_source
== IFSRC_DECL
)
16987 || s
->ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16988 && s
->ns
->proc_name
->attr
.function
))
16989 s
->fn_result_spec
= 1;
16996 /* Resolve function and ENTRY types, issue diagnostics if needed. */
16999 resolve_fntype (gfc_namespace
*ns
)
17001 gfc_entry_list
*el
;
17004 if (ns
->proc_name
== NULL
|| !ns
->proc_name
->attr
.function
)
17007 /* If there are any entries, ns->proc_name is the entry master
17008 synthetic symbol and ns->entries->sym actual FUNCTION symbol. */
17010 sym
= ns
->entries
->sym
;
17012 sym
= ns
->proc_name
;
17013 if (sym
->result
== sym
17014 && sym
->ts
.type
== BT_UNKNOWN
17015 && !gfc_set_default_type (sym
, 0, NULL
)
17016 && !sym
->attr
.untyped
)
17018 gfc_error ("Function %qs at %L has no IMPLICIT type",
17019 sym
->name
, &sym
->declared_at
);
17020 sym
->attr
.untyped
= 1;
17023 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->ts
.u
.derived
->attr
.use_assoc
17024 && !sym
->attr
.contained
17025 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
17026 && gfc_check_symbol_access (sym
))
17028 gfc_notify_std (GFC_STD_F2003
, "PUBLIC function %qs at "
17029 "%L of PRIVATE type %qs", sym
->name
,
17030 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
17034 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
17036 if (el
->sym
->result
== el
->sym
17037 && el
->sym
->ts
.type
== BT_UNKNOWN
17038 && !gfc_set_default_type (el
->sym
, 0, NULL
)
17039 && !el
->sym
->attr
.untyped
)
17041 gfc_error ("ENTRY %qs at %L has no IMPLICIT type",
17042 el
->sym
->name
, &el
->sym
->declared_at
);
17043 el
->sym
->attr
.untyped
= 1;
17047 if (sym
->ts
.type
== BT_CHARACTER
)
17048 gfc_traverse_expr (sym
->ts
.u
.cl
->length
, sym
, flag_fn_result_spec
, 0);
17052 /* 12.3.2.1.1 Defined operators. */
17055 check_uop_procedure (gfc_symbol
*sym
, locus where
)
17057 gfc_formal_arglist
*formal
;
17059 if (!sym
->attr
.function
)
17061 gfc_error ("User operator procedure %qs at %L must be a FUNCTION",
17062 sym
->name
, &where
);
17066 if (sym
->ts
.type
== BT_CHARACTER
17067 && !((sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
) || sym
->ts
.deferred
)
17068 && !(sym
->result
&& ((sym
->result
->ts
.u
.cl
17069 && sym
->result
->ts
.u
.cl
->length
) || sym
->result
->ts
.deferred
)))
17071 gfc_error ("User operator procedure %qs at %L cannot be assumed "
17072 "character length", sym
->name
, &where
);
17076 formal
= gfc_sym_get_dummy_args (sym
);
17077 if (!formal
|| !formal
->sym
)
17079 gfc_error ("User operator procedure %qs at %L must have at least "
17080 "one argument", sym
->name
, &where
);
17084 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
17086 gfc_error ("First argument of operator interface at %L must be "
17087 "INTENT(IN)", &where
);
17091 if (formal
->sym
->attr
.optional
)
17093 gfc_error ("First argument of operator interface at %L cannot be "
17094 "optional", &where
);
17098 formal
= formal
->next
;
17099 if (!formal
|| !formal
->sym
)
17102 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
17104 gfc_error ("Second argument of operator interface at %L must be "
17105 "INTENT(IN)", &where
);
17109 if (formal
->sym
->attr
.optional
)
17111 gfc_error ("Second argument of operator interface at %L cannot be "
17112 "optional", &where
);
17118 gfc_error ("Operator interface at %L must have, at most, two "
17119 "arguments", &where
);
17127 gfc_resolve_uops (gfc_symtree
*symtree
)
17129 gfc_interface
*itr
;
17131 if (symtree
== NULL
)
17134 gfc_resolve_uops (symtree
->left
);
17135 gfc_resolve_uops (symtree
->right
);
17137 for (itr
= symtree
->n
.uop
->op
; itr
; itr
= itr
->next
)
17138 check_uop_procedure (itr
->sym
, itr
->sym
->declared_at
);
17142 /* Examine all of the expressions associated with a program unit,
17143 assign types to all intermediate expressions, make sure that all
17144 assignments are to compatible types and figure out which names
17145 refer to which functions or subroutines. It doesn't check code
17146 block, which is handled by gfc_resolve_code. */
17149 resolve_types (gfc_namespace
*ns
)
17155 gfc_namespace
* old_ns
= gfc_current_ns
;
17156 bool recursive
= ns
->proc_name
&& ns
->proc_name
->attr
.recursive
;
17158 if (ns
->types_resolved
)
17161 /* Check that all IMPLICIT types are ok. */
17162 if (!ns
->seen_implicit_none
)
17165 for (letter
= 0; letter
!= GFC_LETTERS
; ++letter
)
17166 if (ns
->set_flag
[letter
]
17167 && !resolve_typespec_used (&ns
->default_type
[letter
],
17168 &ns
->implicit_loc
[letter
], NULL
))
17172 gfc_current_ns
= ns
;
17174 resolve_entries (ns
);
17176 resolve_common_vars (&ns
->blank_common
, false);
17177 resolve_common_blocks (ns
->common_root
);
17179 resolve_contained_functions (ns
);
17181 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
17182 && ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
17183 gfc_resolve_formal_arglist (ns
->proc_name
);
17185 gfc_traverse_ns (ns
, resolve_bind_c_derived_types
);
17187 for (cl
= ns
->cl_list
; cl
; cl
= cl
->next
)
17188 resolve_charlen (cl
);
17190 gfc_traverse_ns (ns
, resolve_symbol
);
17192 resolve_fntype (ns
);
17194 for (n
= ns
->contained
; n
; n
= n
->sibling
)
17196 if (gfc_pure (ns
->proc_name
) && !gfc_pure (n
->proc_name
))
17197 gfc_error ("Contained procedure %qs at %L of a PURE procedure must "
17198 "also be PURE", n
->proc_name
->name
,
17199 &n
->proc_name
->declared_at
);
17205 gfc_do_concurrent_flag
= 0;
17206 gfc_check_interfaces (ns
);
17208 gfc_traverse_ns (ns
, resolve_values
);
17210 if (ns
->save_all
|| (!flag_automatic
&& !recursive
))
17214 for (d
= ns
->data
; d
; d
= d
->next
)
17218 gfc_traverse_ns (ns
, gfc_formalize_init_value
);
17220 gfc_traverse_ns (ns
, gfc_verify_binding_labels
);
17222 for (eq
= ns
->equiv
; eq
; eq
= eq
->next
)
17223 resolve_equivalence (eq
);
17225 /* Warn about unused labels. */
17226 if (warn_unused_label
)
17227 warn_unused_fortran_label (ns
->st_labels
);
17229 gfc_resolve_uops (ns
->uop_root
);
17231 gfc_traverse_ns (ns
, gfc_verify_DTIO_procedures
);
17233 gfc_resolve_omp_declare_simd (ns
);
17235 gfc_resolve_omp_udrs (ns
->omp_udr_root
);
17237 ns
->types_resolved
= 1;
17239 gfc_current_ns
= old_ns
;
17243 /* Call gfc_resolve_code recursively. */
17246 resolve_codes (gfc_namespace
*ns
)
17249 bitmap_obstack old_obstack
;
17251 if (ns
->resolved
== 1)
17254 for (n
= ns
->contained
; n
; n
= n
->sibling
)
17257 gfc_current_ns
= ns
;
17259 /* Don't clear 'cs_base' if this is the namespace of a BLOCK construct. */
17260 if (!(ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_LABEL
))
17263 /* Set to an out of range value. */
17264 current_entry_id
= -1;
17266 old_obstack
= labels_obstack
;
17267 bitmap_obstack_initialize (&labels_obstack
);
17269 gfc_resolve_oacc_declare (ns
);
17270 gfc_resolve_oacc_routines (ns
);
17271 gfc_resolve_omp_local_vars (ns
);
17272 gfc_resolve_code (ns
->code
, ns
);
17274 bitmap_obstack_release (&labels_obstack
);
17275 labels_obstack
= old_obstack
;
17279 /* This function is called after a complete program unit has been compiled.
17280 Its purpose is to examine all of the expressions associated with a program
17281 unit, assign types to all intermediate expressions, make sure that all
17282 assignments are to compatible types and figure out which names refer to
17283 which functions or subroutines. */
17286 gfc_resolve (gfc_namespace
*ns
)
17288 gfc_namespace
*old_ns
;
17289 code_stack
*old_cs_base
;
17290 struct gfc_omp_saved_state old_omp_state
;
17296 old_ns
= gfc_current_ns
;
17297 old_cs_base
= cs_base
;
17299 /* As gfc_resolve can be called during resolution of an OpenMP construct
17300 body, we should clear any state associated to it, so that say NS's
17301 DO loops are not interpreted as OpenMP loops. */
17302 if (!ns
->construct_entities
)
17303 gfc_omp_save_and_clear_state (&old_omp_state
);
17305 resolve_types (ns
);
17306 component_assignment_level
= 0;
17307 resolve_codes (ns
);
17309 gfc_current_ns
= old_ns
;
17310 cs_base
= old_cs_base
;
17313 gfc_run_passes (ns
);
17315 if (!ns
->construct_entities
)
17316 gfc_omp_restore_state (&old_omp_state
);