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
))
2280 gfc_warning (OPT_Wpedantic
,
2281 "%qs at %L is an array and OPTIONAL; IF IT IS "
2282 "MISSING, it cannot be the actual argument of an "
2283 "ELEMENTAL procedure unless there is a non-optional "
2284 "argument with the same rank (12.4.1.5)",
2285 arg
->expr
->symtree
->n
.sym
->name
, &arg
->expr
->where
);
2289 for (arg
= arg0
; arg
; arg
= arg
->next
)
2291 if (arg
->expr
== NULL
|| arg
->expr
->rank
== 0)
2294 /* Being elemental, the last upper bound of an assumed size array
2295 argument must be present. */
2296 if (resolve_assumed_size_actual (arg
->expr
))
2299 /* Elemental procedure's array actual arguments must conform. */
2302 if (!gfc_check_conformance (arg
->expr
, e
, "elemental procedure"))
2309 /* INTENT(OUT) is only allowed for subroutines; if any actual argument
2310 is an array, the intent inout/out variable needs to be also an array. */
2311 if (rank
> 0 && esym
&& expr
== NULL
)
2312 for (eformal
= esym
->formal
, arg
= arg0
; arg
&& eformal
;
2313 arg
= arg
->next
, eformal
= eformal
->next
)
2314 if ((eformal
->sym
->attr
.intent
== INTENT_OUT
2315 || eformal
->sym
->attr
.intent
== INTENT_INOUT
)
2316 && arg
->expr
&& arg
->expr
->rank
== 0)
2318 gfc_error ("Actual argument at %L for INTENT(%s) dummy %qs of "
2319 "ELEMENTAL subroutine %qs is a scalar, but another "
2320 "actual argument is an array", &arg
->expr
->where
,
2321 (eformal
->sym
->attr
.intent
== INTENT_OUT
) ? "OUT"
2322 : "INOUT", eformal
->sym
->name
, esym
->name
);
2329 /* This function does the checking of references to global procedures
2330 as defined in sections 18.1 and 14.1, respectively, of the Fortran
2331 77 and 95 standards. It checks for a gsymbol for the name, making
2332 one if it does not already exist. If it already exists, then the
2333 reference being resolved must correspond to the type of gsymbol.
2334 Otherwise, the new symbol is equipped with the attributes of the
2335 reference. The corresponding code that is called in creating
2336 global entities is parse.c.
2338 In addition, for all but -std=legacy, the gsymbols are used to
2339 check the interfaces of external procedures from the same file.
2340 The namespace of the gsymbol is resolved and then, once this is
2341 done the interface is checked. */
2345 not_in_recursive (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2347 if (!gsym_ns
->proc_name
->attr
.recursive
)
2350 if (sym
->ns
== gsym_ns
)
2353 if (sym
->ns
->parent
&& sym
->ns
->parent
== gsym_ns
)
2360 not_entry_self_reference (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2362 if (gsym_ns
->entries
)
2364 gfc_entry_list
*entry
= gsym_ns
->entries
;
2366 for (; entry
; entry
= entry
->next
)
2368 if (strcmp (sym
->name
, entry
->sym
->name
) == 0)
2370 if (strcmp (gsym_ns
->proc_name
->name
,
2371 sym
->ns
->proc_name
->name
) == 0)
2375 && strcmp (gsym_ns
->proc_name
->name
,
2376 sym
->ns
->parent
->proc_name
->name
) == 0)
2385 /* Check for the requirement of an explicit interface. F08:12.4.2.2. */
2388 gfc_explicit_interface_required (gfc_symbol
*sym
, char *errmsg
, int err_len
)
2390 gfc_formal_arglist
*arg
= gfc_sym_get_dummy_args (sym
);
2392 for ( ; arg
; arg
= arg
->next
)
2397 if (arg
->sym
->attr
.allocatable
) /* (2a) */
2399 strncpy (errmsg
, _("allocatable argument"), err_len
);
2402 else if (arg
->sym
->attr
.asynchronous
)
2404 strncpy (errmsg
, _("asynchronous argument"), err_len
);
2407 else if (arg
->sym
->attr
.optional
)
2409 strncpy (errmsg
, _("optional argument"), err_len
);
2412 else if (arg
->sym
->attr
.pointer
)
2414 strncpy (errmsg
, _("pointer argument"), err_len
);
2417 else if (arg
->sym
->attr
.target
)
2419 strncpy (errmsg
, _("target argument"), err_len
);
2422 else if (arg
->sym
->attr
.value
)
2424 strncpy (errmsg
, _("value argument"), err_len
);
2427 else if (arg
->sym
->attr
.volatile_
)
2429 strncpy (errmsg
, _("volatile argument"), err_len
);
2432 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_SHAPE
) /* (2b) */
2434 strncpy (errmsg
, _("assumed-shape argument"), err_len
);
2437 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_RANK
) /* TS 29113, 6.2. */
2439 strncpy (errmsg
, _("assumed-rank argument"), err_len
);
2442 else if (arg
->sym
->attr
.codimension
) /* (2c) */
2444 strncpy (errmsg
, _("coarray argument"), err_len
);
2447 else if (false) /* (2d) TODO: parametrized derived type */
2449 strncpy (errmsg
, _("parametrized derived type argument"), err_len
);
2452 else if (arg
->sym
->ts
.type
== BT_CLASS
) /* (2e) */
2454 strncpy (errmsg
, _("polymorphic argument"), err_len
);
2457 else if (arg
->sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
2459 strncpy (errmsg
, _("NO_ARG_CHECK attribute"), err_len
);
2462 else if (arg
->sym
->ts
.type
== BT_ASSUMED
)
2464 /* As assumed-type is unlimited polymorphic (cf. above).
2465 See also TS 29113, Note 6.1. */
2466 strncpy (errmsg
, _("assumed-type argument"), err_len
);
2471 if (sym
->attr
.function
)
2473 gfc_symbol
*res
= sym
->result
? sym
->result
: sym
;
2475 if (res
->attr
.dimension
) /* (3a) */
2477 strncpy (errmsg
, _("array result"), err_len
);
2480 else if (res
->attr
.pointer
|| res
->attr
.allocatable
) /* (3b) */
2482 strncpy (errmsg
, _("pointer or allocatable result"), err_len
);
2485 else if (res
->ts
.type
== BT_CHARACTER
&& res
->ts
.u
.cl
2486 && res
->ts
.u
.cl
->length
2487 && res
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
) /* (3c) */
2489 strncpy (errmsg
, _("result with non-constant character length"), err_len
);
2494 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
) /* (4) */
2496 strncpy (errmsg
, _("elemental procedure"), err_len
);
2499 else if (sym
->attr
.is_bind_c
) /* (5) */
2501 strncpy (errmsg
, _("bind(c) procedure"), err_len
);
2510 resolve_global_procedure (gfc_symbol
*sym
, locus
*where
, int sub
)
2514 enum gfc_symbol_type type
;
2517 type
= sub
? GSYM_SUBROUTINE
: GSYM_FUNCTION
;
2519 gsym
= gfc_get_gsymbol (sym
->binding_label
? sym
->binding_label
: sym
->name
,
2520 sym
->binding_label
!= NULL
);
2522 if ((gsym
->type
!= GSYM_UNKNOWN
&& gsym
->type
!= type
))
2523 gfc_global_used (gsym
, where
);
2525 if ((sym
->attr
.if_source
== IFSRC_UNKNOWN
2526 || sym
->attr
.if_source
== IFSRC_IFBODY
)
2527 && gsym
->type
!= GSYM_UNKNOWN
2528 && !gsym
->binding_label
2530 && gsym
->ns
->proc_name
2531 && not_in_recursive (sym
, gsym
->ns
)
2532 && not_entry_self_reference (sym
, gsym
->ns
))
2534 gfc_symbol
*def_sym
;
2535 def_sym
= gsym
->ns
->proc_name
;
2537 if (gsym
->ns
->resolved
!= -1)
2540 /* Resolve the gsymbol namespace if needed. */
2541 if (!gsym
->ns
->resolved
)
2543 gfc_symbol
*old_dt_list
;
2545 /* Stash away derived types so that the backend_decls
2546 do not get mixed up. */
2547 old_dt_list
= gfc_derived_types
;
2548 gfc_derived_types
= NULL
;
2550 gfc_resolve (gsym
->ns
);
2552 /* Store the new derived types with the global namespace. */
2553 if (gfc_derived_types
)
2554 gsym
->ns
->derived_types
= gfc_derived_types
;
2556 /* Restore the derived types of this namespace. */
2557 gfc_derived_types
= old_dt_list
;
2560 /* Make sure that translation for the gsymbol occurs before
2561 the procedure currently being resolved. */
2562 ns
= gfc_global_ns_list
;
2563 for (; ns
&& ns
!= gsym
->ns
; ns
= ns
->sibling
)
2565 if (ns
->sibling
== gsym
->ns
)
2567 ns
->sibling
= gsym
->ns
->sibling
;
2568 gsym
->ns
->sibling
= gfc_global_ns_list
;
2569 gfc_global_ns_list
= gsym
->ns
;
2574 /* This can happen if a binding name has been specified. */
2575 if (gsym
->binding_label
&& gsym
->sym_name
!= def_sym
->name
)
2576 gfc_find_symbol (gsym
->sym_name
, gsym
->ns
, 0, &def_sym
);
2578 if (def_sym
->attr
.entry_master
|| def_sym
->attr
.entry
)
2580 gfc_entry_list
*entry
;
2581 for (entry
= gsym
->ns
->entries
; entry
; entry
= entry
->next
)
2582 if (strcmp (entry
->sym
->name
, sym
->name
) == 0)
2584 def_sym
= entry
->sym
;
2590 if (sym
->attr
.function
&& !gfc_compare_types (&sym
->ts
, &def_sym
->ts
))
2592 gfc_error ("Return type mismatch of function %qs at %L (%s/%s)",
2593 sym
->name
, &sym
->declared_at
, gfc_typename (&sym
->ts
),
2594 gfc_typename (&def_sym
->ts
));
2598 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
2599 && gfc_explicit_interface_required (def_sym
, reason
, sizeof(reason
)))
2601 gfc_error ("Explicit interface required for %qs at %L: %s",
2602 sym
->name
, &sym
->declared_at
, reason
);
2606 bool bad_result_characteristics
;
2607 if (!gfc_compare_interfaces (sym
, def_sym
, sym
->name
, 0, 1,
2608 reason
, sizeof(reason
), NULL
, NULL
,
2609 &bad_result_characteristics
))
2611 /* Turn erros into warnings with -std=gnu and -std=legacy,
2612 unless a function returns a wrong type, which can lead
2613 to all kinds of ICEs and wrong code. */
2615 if (!pedantic
&& (gfc_option
.allow_std
& GFC_STD_GNU
)
2616 && !bad_result_characteristics
)
2617 gfc_errors_to_warnings (true);
2619 gfc_error ("Interface mismatch in global procedure %qs at %L: %s",
2620 sym
->name
, &sym
->declared_at
, reason
);
2621 gfc_errors_to_warnings (false);
2628 if (gsym
->type
== GSYM_UNKNOWN
)
2631 gsym
->where
= *where
;
2638 /************* Function resolution *************/
2640 /* Resolve a function call known to be generic.
2641 Section 14.1.2.4.1. */
2644 resolve_generic_f0 (gfc_expr
*expr
, gfc_symbol
*sym
)
2648 if (sym
->attr
.generic
)
2650 s
= gfc_search_interface (sym
->generic
, 0, &expr
->value
.function
.actual
);
2653 expr
->value
.function
.name
= s
->name
;
2654 expr
->value
.function
.esym
= s
;
2656 if (s
->ts
.type
!= BT_UNKNOWN
)
2658 else if (s
->result
!= NULL
&& s
->result
->ts
.type
!= BT_UNKNOWN
)
2659 expr
->ts
= s
->result
->ts
;
2662 expr
->rank
= s
->as
->rank
;
2663 else if (s
->result
!= NULL
&& s
->result
->as
!= NULL
)
2664 expr
->rank
= s
->result
->as
->rank
;
2666 gfc_set_sym_referenced (expr
->value
.function
.esym
);
2671 /* TODO: Need to search for elemental references in generic
2675 if (sym
->attr
.intrinsic
)
2676 return gfc_intrinsic_func_interface (expr
, 0);
2683 resolve_generic_f (gfc_expr
*expr
)
2687 gfc_interface
*intr
= NULL
;
2689 sym
= expr
->symtree
->n
.sym
;
2693 m
= resolve_generic_f0 (expr
, sym
);
2696 else if (m
== MATCH_ERROR
)
2701 for (intr
= sym
->generic
; intr
; intr
= intr
->next
)
2702 if (gfc_fl_struct (intr
->sym
->attr
.flavor
))
2705 if (sym
->ns
->parent
== NULL
)
2707 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2711 if (!generic_sym (sym
))
2715 /* Last ditch attempt. See if the reference is to an intrinsic
2716 that possesses a matching interface. 14.1.2.4 */
2717 if (sym
&& !intr
&& !gfc_is_intrinsic (sym
, 0, expr
->where
))
2719 if (gfc_init_expr_flag
)
2720 gfc_error ("Function %qs in initialization expression at %L "
2721 "must be an intrinsic function",
2722 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2724 gfc_error ("There is no specific function for the generic %qs "
2725 "at %L", expr
->symtree
->n
.sym
->name
, &expr
->where
);
2731 if (!gfc_convert_to_structure_constructor (expr
, intr
->sym
, NULL
,
2734 if (!gfc_use_derived (expr
->ts
.u
.derived
))
2736 return resolve_structure_cons (expr
, 0);
2739 m
= gfc_intrinsic_func_interface (expr
, 0);
2744 gfc_error ("Generic function %qs at %L is not consistent with a "
2745 "specific intrinsic interface", expr
->symtree
->n
.sym
->name
,
2752 /* Resolve a function call known to be specific. */
2755 resolve_specific_f0 (gfc_symbol
*sym
, gfc_expr
*expr
)
2759 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
2761 if (sym
->attr
.dummy
)
2763 sym
->attr
.proc
= PROC_DUMMY
;
2767 sym
->attr
.proc
= PROC_EXTERNAL
;
2771 if (sym
->attr
.proc
== PROC_MODULE
2772 || sym
->attr
.proc
== PROC_ST_FUNCTION
2773 || sym
->attr
.proc
== PROC_INTERNAL
)
2776 if (sym
->attr
.intrinsic
)
2778 m
= gfc_intrinsic_func_interface (expr
, 1);
2782 gfc_error ("Function %qs at %L is INTRINSIC but is not compatible "
2783 "with an intrinsic", sym
->name
, &expr
->where
);
2791 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2794 expr
->ts
= sym
->result
->ts
;
2797 expr
->value
.function
.name
= sym
->name
;
2798 expr
->value
.function
.esym
= sym
;
2799 /* Prevent crash when sym->ts.u.derived->components is not set due to previous
2801 if (sym
->ts
.type
== BT_CLASS
&& !CLASS_DATA (sym
))
2803 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)
2804 expr
->rank
= CLASS_DATA (sym
)->as
->rank
;
2805 else if (sym
->as
!= NULL
)
2806 expr
->rank
= sym
->as
->rank
;
2813 resolve_specific_f (gfc_expr
*expr
)
2818 sym
= expr
->symtree
->n
.sym
;
2822 m
= resolve_specific_f0 (sym
, expr
);
2825 if (m
== MATCH_ERROR
)
2828 if (sym
->ns
->parent
== NULL
)
2831 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2837 gfc_error ("Unable to resolve the specific function %qs at %L",
2838 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2843 /* Recursively append candidate SYM to CANDIDATES. Store the number of
2844 candidates in CANDIDATES_LEN. */
2847 lookup_function_fuzzy_find_candidates (gfc_symtree
*sym
,
2849 size_t &candidates_len
)
2855 if ((sym
->n
.sym
->ts
.type
!= BT_UNKNOWN
|| sym
->n
.sym
->attr
.external
)
2856 && sym
->n
.sym
->attr
.flavor
== FL_PROCEDURE
)
2857 vec_push (candidates
, candidates_len
, sym
->name
);
2861 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2865 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2869 /* Lookup function FN fuzzily, taking names in SYMROOT into account. */
2872 gfc_lookup_function_fuzzy (const char *fn
, gfc_symtree
*symroot
)
2874 char **candidates
= NULL
;
2875 size_t candidates_len
= 0;
2876 lookup_function_fuzzy_find_candidates (symroot
, candidates
, candidates_len
);
2877 return gfc_closest_fuzzy_match (fn
, candidates
);
2881 /* Resolve a procedure call not known to be generic nor specific. */
2884 resolve_unknown_f (gfc_expr
*expr
)
2889 sym
= expr
->symtree
->n
.sym
;
2891 if (sym
->attr
.dummy
)
2893 sym
->attr
.proc
= PROC_DUMMY
;
2894 expr
->value
.function
.name
= sym
->name
;
2898 /* See if we have an intrinsic function reference. */
2900 if (gfc_is_intrinsic (sym
, 0, expr
->where
))
2902 if (gfc_intrinsic_func_interface (expr
, 1) == MATCH_YES
)
2907 /* The reference is to an external name. */
2909 sym
->attr
.proc
= PROC_EXTERNAL
;
2910 expr
->value
.function
.name
= sym
->name
;
2911 expr
->value
.function
.esym
= expr
->symtree
->n
.sym
;
2913 if (sym
->as
!= NULL
)
2914 expr
->rank
= sym
->as
->rank
;
2916 /* Type of the expression is either the type of the symbol or the
2917 default type of the symbol. */
2920 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2922 if (sym
->ts
.type
!= BT_UNKNOWN
)
2926 ts
= gfc_get_default_type (sym
->name
, sym
->ns
);
2928 if (ts
->type
== BT_UNKNOWN
)
2931 = gfc_lookup_function_fuzzy (sym
->name
, sym
->ns
->sym_root
);
2933 gfc_error ("Function %qs at %L has no IMPLICIT type"
2934 "; did you mean %qs?",
2935 sym
->name
, &expr
->where
, guessed
);
2937 gfc_error ("Function %qs at %L has no IMPLICIT type",
2938 sym
->name
, &expr
->where
);
2949 /* Return true, if the symbol is an external procedure. */
2951 is_external_proc (gfc_symbol
*sym
)
2953 if (!sym
->attr
.dummy
&& !sym
->attr
.contained
2954 && !gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, sym
->declared_at
)
2955 && sym
->attr
.proc
!= PROC_ST_FUNCTION
2956 && !sym
->attr
.proc_pointer
2957 && !sym
->attr
.use_assoc
2965 /* Figure out if a function reference is pure or not. Also set the name
2966 of the function for a potential error message. Return nonzero if the
2967 function is PURE, zero if not. */
2969 pure_stmt_function (gfc_expr
*, gfc_symbol
*);
2972 gfc_pure_function (gfc_expr
*e
, const char **name
)
2975 gfc_component
*comp
;
2979 if (e
->symtree
!= NULL
2980 && e
->symtree
->n
.sym
!= NULL
2981 && e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
2982 return pure_stmt_function (e
, e
->symtree
->n
.sym
);
2984 comp
= gfc_get_proc_ptr_comp (e
);
2987 pure
= gfc_pure (comp
->ts
.interface
);
2990 else if (e
->value
.function
.esym
)
2992 pure
= gfc_pure (e
->value
.function
.esym
);
2993 *name
= e
->value
.function
.esym
->name
;
2995 else if (e
->value
.function
.isym
)
2997 pure
= e
->value
.function
.isym
->pure
2998 || e
->value
.function
.isym
->elemental
;
2999 *name
= e
->value
.function
.isym
->name
;
3003 /* Implicit functions are not pure. */
3005 *name
= e
->value
.function
.name
;
3012 /* Check if the expression is a reference to an implicitly pure function. */
3015 gfc_implicit_pure_function (gfc_expr
*e
)
3017 gfc_component
*comp
= gfc_get_proc_ptr_comp (e
);
3019 return gfc_implicit_pure (comp
->ts
.interface
);
3020 else if (e
->value
.function
.esym
)
3021 return gfc_implicit_pure (e
->value
.function
.esym
);
3028 impure_stmt_fcn (gfc_expr
*e
, gfc_symbol
*sym
,
3029 int *f ATTRIBUTE_UNUSED
)
3033 /* Don't bother recursing into other statement functions
3034 since they will be checked individually for purity. */
3035 if (e
->expr_type
!= EXPR_FUNCTION
3037 || e
->symtree
->n
.sym
== sym
3038 || e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
3041 return gfc_pure_function (e
, &name
) ? false : true;
3046 pure_stmt_function (gfc_expr
*e
, gfc_symbol
*sym
)
3048 return gfc_traverse_expr (e
, sym
, impure_stmt_fcn
, 0) ? 0 : 1;
3052 /* Check if an impure function is allowed in the current context. */
3054 static bool check_pure_function (gfc_expr
*e
)
3056 const char *name
= NULL
;
3057 if (!gfc_pure_function (e
, &name
) && name
)
3061 gfc_error ("Reference to impure function %qs at %L inside a "
3062 "FORALL %s", name
, &e
->where
,
3063 forall_flag
== 2 ? "mask" : "block");
3066 else if (gfc_do_concurrent_flag
)
3068 gfc_error ("Reference to impure function %qs at %L inside a "
3069 "DO CONCURRENT %s", name
, &e
->where
,
3070 gfc_do_concurrent_flag
== 2 ? "mask" : "block");
3073 else if (gfc_pure (NULL
))
3075 gfc_error ("Reference to impure function %qs at %L "
3076 "within a PURE procedure", name
, &e
->where
);
3079 if (!gfc_implicit_pure_function (e
))
3080 gfc_unset_implicit_pure (NULL
);
3086 /* Update current procedure's array_outer_dependency flag, considering
3087 a call to procedure SYM. */
3090 update_current_proc_array_outer_dependency (gfc_symbol
*sym
)
3092 /* Check to see if this is a sibling function that has not yet
3094 gfc_namespace
*sibling
= gfc_current_ns
->sibling
;
3095 for (; sibling
; sibling
= sibling
->sibling
)
3097 if (sibling
->proc_name
== sym
)
3099 gfc_resolve (sibling
);
3104 /* If SYM has references to outer arrays, so has the procedure calling
3105 SYM. If SYM is a procedure pointer, we can assume the worst. */
3106 if ((sym
->attr
.array_outer_dependency
|| sym
->attr
.proc_pointer
)
3107 && gfc_current_ns
->proc_name
)
3108 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3112 /* Resolve a function call, which means resolving the arguments, then figuring
3113 out which entity the name refers to. */
3116 resolve_function (gfc_expr
*expr
)
3118 gfc_actual_arglist
*arg
;
3122 procedure_type p
= PROC_INTRINSIC
;
3123 bool no_formal_args
;
3127 sym
= expr
->symtree
->n
.sym
;
3129 /* If this is a procedure pointer component, it has already been resolved. */
3130 if (gfc_is_proc_ptr_comp (expr
))
3133 /* Avoid re-resolving the arguments of caf_get, which can lead to inserting
3135 if (sym
&& sym
->attr
.intrinsic
3136 && (sym
->intmod_sym_id
== GFC_ISYM_CAF_GET
3137 || sym
->intmod_sym_id
== GFC_ISYM_CAF_SEND
))
3142 gfc_error ("Unexpected junk after %qs at %L", expr
->symtree
->n
.sym
->name
,
3147 if (sym
&& sym
->attr
.intrinsic
3148 && !gfc_resolve_intrinsic (sym
, &expr
->where
))
3151 if (sym
&& (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.subroutine
))
3153 gfc_error ("%qs at %L is not a function", sym
->name
, &expr
->where
);
3157 /* If this is a deferred TBP with an abstract interface (which may
3158 of course be referenced), expr->value.function.esym will be set. */
3159 if (sym
&& sym
->attr
.abstract
&& !expr
->value
.function
.esym
)
3161 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3162 sym
->name
, &expr
->where
);
3166 /* If this is a deferred TBP with an abstract interface, its result
3167 cannot be an assumed length character (F2003: C418). */
3168 if (sym
&& sym
->attr
.abstract
&& sym
->attr
.function
3169 && sym
->result
->ts
.u
.cl
3170 && sym
->result
->ts
.u
.cl
->length
== NULL
3171 && !sym
->result
->ts
.deferred
)
3173 gfc_error ("ABSTRACT INTERFACE %qs at %L must not have an assumed "
3174 "character length result (F2008: C418)", sym
->name
,
3179 /* Switch off assumed size checking and do this again for certain kinds
3180 of procedure, once the procedure itself is resolved. */
3181 need_full_assumed_size
++;
3183 if (expr
->symtree
&& expr
->symtree
->n
.sym
)
3184 p
= expr
->symtree
->n
.sym
->attr
.proc
;
3186 if (expr
->value
.function
.isym
&& expr
->value
.function
.isym
->inquiry
)
3187 inquiry_argument
= true;
3188 no_formal_args
= sym
&& is_external_proc (sym
)
3189 && gfc_sym_get_dummy_args (sym
) == NULL
;
3191 if (!resolve_actual_arglist (expr
->value
.function
.actual
,
3194 inquiry_argument
= false;
3198 inquiry_argument
= false;
3200 /* Resume assumed_size checking. */
3201 need_full_assumed_size
--;
3203 /* If the procedure is external, check for usage. */
3204 if (sym
&& is_external_proc (sym
))
3205 resolve_global_procedure (sym
, &expr
->where
, 0);
3207 if (sym
&& sym
->ts
.type
== BT_CHARACTER
3209 && sym
->ts
.u
.cl
->length
== NULL
3211 && !sym
->ts
.deferred
3212 && expr
->value
.function
.esym
== NULL
3213 && !sym
->attr
.contained
)
3215 /* Internal procedures are taken care of in resolve_contained_fntype. */
3216 gfc_error ("Function %qs is declared CHARACTER(*) and cannot "
3217 "be used at %L since it is not a dummy argument",
3218 sym
->name
, &expr
->where
);
3222 /* See if function is already resolved. */
3224 if (expr
->value
.function
.name
!= NULL
3225 || expr
->value
.function
.isym
!= NULL
)
3227 if (expr
->ts
.type
== BT_UNKNOWN
)
3233 /* Apply the rules of section 14.1.2. */
3235 switch (procedure_kind (sym
))
3238 t
= resolve_generic_f (expr
);
3241 case PTYPE_SPECIFIC
:
3242 t
= resolve_specific_f (expr
);
3246 t
= resolve_unknown_f (expr
);
3250 gfc_internal_error ("resolve_function(): bad function type");
3254 /* If the expression is still a function (it might have simplified),
3255 then we check to see if we are calling an elemental function. */
3257 if (expr
->expr_type
!= EXPR_FUNCTION
)
3260 /* Walk the argument list looking for invalid BOZ. */
3261 for (arg
= expr
->value
.function
.actual
; arg
; arg
= arg
->next
)
3262 if (arg
->expr
&& arg
->expr
->ts
.type
== BT_BOZ
)
3264 gfc_error ("A BOZ literal constant at %L cannot appear as an "
3265 "actual argument in a function reference",
3270 temp
= need_full_assumed_size
;
3271 need_full_assumed_size
= 0;
3273 if (!resolve_elemental_actual (expr
, NULL
))
3276 if (omp_workshare_flag
3277 && expr
->value
.function
.esym
3278 && ! gfc_elemental (expr
->value
.function
.esym
))
3280 gfc_error ("User defined non-ELEMENTAL function %qs at %L not allowed "
3281 "in WORKSHARE construct", expr
->value
.function
.esym
->name
,
3286 #define GENERIC_ID expr->value.function.isym->id
3287 else if (expr
->value
.function
.actual
!= NULL
3288 && expr
->value
.function
.isym
!= NULL
3289 && GENERIC_ID
!= GFC_ISYM_LBOUND
3290 && GENERIC_ID
!= GFC_ISYM_LCOBOUND
3291 && GENERIC_ID
!= GFC_ISYM_UCOBOUND
3292 && GENERIC_ID
!= GFC_ISYM_LEN
3293 && GENERIC_ID
!= GFC_ISYM_LOC
3294 && GENERIC_ID
!= GFC_ISYM_C_LOC
3295 && GENERIC_ID
!= GFC_ISYM_PRESENT
)
3297 /* Array intrinsics must also have the last upper bound of an
3298 assumed size array argument. UBOUND and SIZE have to be
3299 excluded from the check if the second argument is anything
3302 for (arg
= expr
->value
.function
.actual
; arg
; arg
= arg
->next
)
3304 if ((GENERIC_ID
== GFC_ISYM_UBOUND
|| GENERIC_ID
== GFC_ISYM_SIZE
)
3305 && arg
== expr
->value
.function
.actual
3306 && arg
->next
!= NULL
&& arg
->next
->expr
)
3308 if (arg
->next
->expr
->expr_type
!= EXPR_CONSTANT
)
3311 if (arg
->next
->name
&& strcmp (arg
->next
->name
, "kind") == 0)
3314 if ((int)mpz_get_si (arg
->next
->expr
->value
.integer
)
3319 if (arg
->expr
!= NULL
3320 && arg
->expr
->rank
> 0
3321 && resolve_assumed_size_actual (arg
->expr
))
3327 need_full_assumed_size
= temp
;
3329 if (!check_pure_function(expr
))
3332 /* Functions without the RECURSIVE attribution are not allowed to
3333 * call themselves. */
3334 if (expr
->value
.function
.esym
&& !expr
->value
.function
.esym
->attr
.recursive
)
3337 esym
= expr
->value
.function
.esym
;
3339 if (is_illegal_recursion (esym
, gfc_current_ns
))
3341 if (esym
->attr
.entry
&& esym
->ns
->entries
)
3342 gfc_error ("ENTRY %qs at %L cannot be called recursively, as"
3343 " function %qs is not RECURSIVE",
3344 esym
->name
, &expr
->where
, esym
->ns
->entries
->sym
->name
);
3346 gfc_error ("Function %qs at %L cannot be called recursively, as it"
3347 " is not RECURSIVE", esym
->name
, &expr
->where
);
3353 /* Character lengths of use associated functions may contains references to
3354 symbols not referenced from the current program unit otherwise. Make sure
3355 those symbols are marked as referenced. */
3357 if (expr
->ts
.type
== BT_CHARACTER
&& expr
->value
.function
.esym
3358 && expr
->value
.function
.esym
->attr
.use_assoc
)
3360 gfc_expr_set_symbols_referenced (expr
->ts
.u
.cl
->length
);
3363 /* Make sure that the expression has a typespec that works. */
3364 if (expr
->ts
.type
== BT_UNKNOWN
)
3366 if (expr
->symtree
->n
.sym
->result
3367 && expr
->symtree
->n
.sym
->result
->ts
.type
!= BT_UNKNOWN
3368 && !expr
->symtree
->n
.sym
->result
->attr
.proc_pointer
)
3369 expr
->ts
= expr
->symtree
->n
.sym
->result
->ts
;
3372 if (!expr
->ref
&& !expr
->value
.function
.isym
)
3374 if (expr
->value
.function
.esym
)
3375 update_current_proc_array_outer_dependency (expr
->value
.function
.esym
);
3377 update_current_proc_array_outer_dependency (sym
);
3380 /* typebound procedure: Assume the worst. */
3381 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3387 /************* Subroutine resolution *************/
3390 pure_subroutine (gfc_symbol
*sym
, const char *name
, locus
*loc
)
3397 gfc_error ("Subroutine call to %qs in FORALL block at %L is not PURE",
3401 else if (gfc_do_concurrent_flag
)
3403 gfc_error ("Subroutine call to %qs in DO CONCURRENT block at %L is not "
3407 else if (gfc_pure (NULL
))
3409 gfc_error ("Subroutine call to %qs at %L is not PURE", name
, loc
);
3413 gfc_unset_implicit_pure (NULL
);
3419 resolve_generic_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3423 if (sym
->attr
.generic
)
3425 s
= gfc_search_interface (sym
->generic
, 1, &c
->ext
.actual
);
3428 c
->resolved_sym
= s
;
3429 if (!pure_subroutine (s
, s
->name
, &c
->loc
))
3434 /* TODO: Need to search for elemental references in generic interface. */
3437 if (sym
->attr
.intrinsic
)
3438 return gfc_intrinsic_sub_interface (c
, 0);
3445 resolve_generic_s (gfc_code
*c
)
3450 sym
= c
->symtree
->n
.sym
;
3454 m
= resolve_generic_s0 (c
, sym
);
3457 else if (m
== MATCH_ERROR
)
3461 if (sym
->ns
->parent
== NULL
)
3463 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3467 if (!generic_sym (sym
))
3471 /* Last ditch attempt. See if the reference is to an intrinsic
3472 that possesses a matching interface. 14.1.2.4 */
3473 sym
= c
->symtree
->n
.sym
;
3475 if (!gfc_is_intrinsic (sym
, 1, c
->loc
))
3477 gfc_error ("There is no specific subroutine for the generic %qs at %L",
3478 sym
->name
, &c
->loc
);
3482 m
= gfc_intrinsic_sub_interface (c
, 0);
3486 gfc_error ("Generic subroutine %qs at %L is not consistent with an "
3487 "intrinsic subroutine interface", sym
->name
, &c
->loc
);
3493 /* Resolve a subroutine call known to be specific. */
3496 resolve_specific_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3500 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
3502 if (sym
->attr
.dummy
)
3504 sym
->attr
.proc
= PROC_DUMMY
;
3508 sym
->attr
.proc
= PROC_EXTERNAL
;
3512 if (sym
->attr
.proc
== PROC_MODULE
|| sym
->attr
.proc
== PROC_INTERNAL
)
3515 if (sym
->attr
.intrinsic
)
3517 m
= gfc_intrinsic_sub_interface (c
, 1);
3521 gfc_error ("Subroutine %qs at %L is INTRINSIC but is not compatible "
3522 "with an intrinsic", sym
->name
, &c
->loc
);
3530 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3532 c
->resolved_sym
= sym
;
3533 if (!pure_subroutine (sym
, sym
->name
, &c
->loc
))
3541 resolve_specific_s (gfc_code
*c
)
3546 sym
= c
->symtree
->n
.sym
;
3550 m
= resolve_specific_s0 (c
, sym
);
3553 if (m
== MATCH_ERROR
)
3556 if (sym
->ns
->parent
== NULL
)
3559 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3565 sym
= c
->symtree
->n
.sym
;
3566 gfc_error ("Unable to resolve the specific subroutine %qs at %L",
3567 sym
->name
, &c
->loc
);
3573 /* Resolve a subroutine call not known to be generic nor specific. */
3576 resolve_unknown_s (gfc_code
*c
)
3580 sym
= c
->symtree
->n
.sym
;
3582 if (sym
->attr
.dummy
)
3584 sym
->attr
.proc
= PROC_DUMMY
;
3588 /* See if we have an intrinsic function reference. */
3590 if (gfc_is_intrinsic (sym
, 1, c
->loc
))
3592 if (gfc_intrinsic_sub_interface (c
, 1) == MATCH_YES
)
3597 /* The reference is to an external name. */
3600 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3602 c
->resolved_sym
= sym
;
3604 return pure_subroutine (sym
, sym
->name
, &c
->loc
);
3608 /* Resolve a subroutine call. Although it was tempting to use the same code
3609 for functions, subroutines and functions are stored differently and this
3610 makes things awkward. */
3613 resolve_call (gfc_code
*c
)
3616 procedure_type ptype
= PROC_INTRINSIC
;
3617 gfc_symbol
*csym
, *sym
;
3618 bool no_formal_args
;
3620 csym
= c
->symtree
? c
->symtree
->n
.sym
: NULL
;
3622 if (csym
&& csym
->ts
.type
!= BT_UNKNOWN
)
3624 gfc_error ("%qs at %L has a type, which is not consistent with "
3625 "the CALL at %L", csym
->name
, &csym
->declared_at
, &c
->loc
);
3629 if (csym
&& gfc_current_ns
->parent
&& csym
->ns
!= gfc_current_ns
)
3632 gfc_find_sym_tree (c
->symtree
->name
, gfc_current_ns
, 1, &st
);
3633 sym
= st
? st
->n
.sym
: NULL
;
3634 if (sym
&& csym
!= sym
3635 && sym
->ns
== gfc_current_ns
3636 && sym
->attr
.flavor
== FL_PROCEDURE
3637 && sym
->attr
.contained
)
3640 if (csym
->attr
.generic
)
3641 c
->symtree
->n
.sym
= sym
;
3644 csym
= c
->symtree
->n
.sym
;
3648 /* If this ia a deferred TBP, c->expr1 will be set. */
3649 if (!c
->expr1
&& csym
)
3651 if (csym
->attr
.abstract
)
3653 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3654 csym
->name
, &c
->loc
);
3658 /* Subroutines without the RECURSIVE attribution are not allowed to
3660 if (is_illegal_recursion (csym
, gfc_current_ns
))
3662 if (csym
->attr
.entry
&& csym
->ns
->entries
)
3663 gfc_error ("ENTRY %qs at %L cannot be called recursively, "
3664 "as subroutine %qs is not RECURSIVE",
3665 csym
->name
, &c
->loc
, csym
->ns
->entries
->sym
->name
);
3667 gfc_error ("SUBROUTINE %qs at %L cannot be called recursively, "
3668 "as it is not RECURSIVE", csym
->name
, &c
->loc
);
3674 /* Switch off assumed size checking and do this again for certain kinds
3675 of procedure, once the procedure itself is resolved. */
3676 need_full_assumed_size
++;
3679 ptype
= csym
->attr
.proc
;
3681 no_formal_args
= csym
&& is_external_proc (csym
)
3682 && gfc_sym_get_dummy_args (csym
) == NULL
;
3683 if (!resolve_actual_arglist (c
->ext
.actual
, ptype
, no_formal_args
))
3686 /* Resume assumed_size checking. */
3687 need_full_assumed_size
--;
3689 /* If external, check for usage. */
3690 if (csym
&& is_external_proc (csym
))
3691 resolve_global_procedure (csym
, &c
->loc
, 1);
3694 if (c
->resolved_sym
== NULL
)
3696 c
->resolved_isym
= NULL
;
3697 switch (procedure_kind (csym
))
3700 t
= resolve_generic_s (c
);
3703 case PTYPE_SPECIFIC
:
3704 t
= resolve_specific_s (c
);
3708 t
= resolve_unknown_s (c
);
3712 gfc_internal_error ("resolve_subroutine(): bad function type");
3716 /* Some checks of elemental subroutine actual arguments. */
3717 if (!resolve_elemental_actual (NULL
, c
))
3721 update_current_proc_array_outer_dependency (csym
);
3723 /* Typebound procedure: Assume the worst. */
3724 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3730 /* Compare the shapes of two arrays that have non-NULL shapes. If both
3731 op1->shape and op2->shape are non-NULL return true if their shapes
3732 match. If both op1->shape and op2->shape are non-NULL return false
3733 if their shapes do not match. If either op1->shape or op2->shape is
3734 NULL, return true. */
3737 compare_shapes (gfc_expr
*op1
, gfc_expr
*op2
)
3744 if (op1
->shape
!= NULL
&& op2
->shape
!= NULL
)
3746 for (i
= 0; i
< op1
->rank
; i
++)
3748 if (mpz_cmp (op1
->shape
[i
], op2
->shape
[i
]) != 0)
3750 gfc_error ("Shapes for operands at %L and %L are not conformable",
3751 &op1
->where
, &op2
->where
);
3761 /* Convert a logical operator to the corresponding bitwise intrinsic call.
3762 For example A .AND. B becomes IAND(A, B). */
3764 logical_to_bitwise (gfc_expr
*e
)
3766 gfc_expr
*tmp
, *op1
, *op2
;
3768 gfc_actual_arglist
*args
= NULL
;
3770 gcc_assert (e
->expr_type
== EXPR_OP
);
3772 isym
= GFC_ISYM_NONE
;
3773 op1
= e
->value
.op
.op1
;
3774 op2
= e
->value
.op
.op2
;
3776 switch (e
->value
.op
.op
)
3779 isym
= GFC_ISYM_NOT
;
3782 isym
= GFC_ISYM_IAND
;
3785 isym
= GFC_ISYM_IOR
;
3787 case INTRINSIC_NEQV
:
3788 isym
= GFC_ISYM_IEOR
;
3791 /* "Bitwise eqv" is just the complement of NEQV === IEOR.
3792 Change the old expression to NEQV, which will get replaced by IEOR,
3793 and wrap it in NOT. */
3794 tmp
= gfc_copy_expr (e
);
3795 tmp
->value
.op
.op
= INTRINSIC_NEQV
;
3796 tmp
= logical_to_bitwise (tmp
);
3797 isym
= GFC_ISYM_NOT
;
3802 gfc_internal_error ("logical_to_bitwise(): Bad intrinsic");
3805 /* Inherit the original operation's operands as arguments. */
3806 args
= gfc_get_actual_arglist ();
3810 args
->next
= gfc_get_actual_arglist ();
3811 args
->next
->expr
= op2
;
3814 /* Convert the expression to a function call. */
3815 e
->expr_type
= EXPR_FUNCTION
;
3816 e
->value
.function
.actual
= args
;
3817 e
->value
.function
.isym
= gfc_intrinsic_function_by_id (isym
);
3818 e
->value
.function
.name
= e
->value
.function
.isym
->name
;
3819 e
->value
.function
.esym
= NULL
;
3821 /* Make up a pre-resolved function call symtree if we need to. */
3822 if (!e
->symtree
|| !e
->symtree
->n
.sym
)
3825 gfc_get_ha_sym_tree (e
->value
.function
.isym
->name
, &e
->symtree
);
3826 sym
= e
->symtree
->n
.sym
;
3828 sym
->attr
.flavor
= FL_PROCEDURE
;
3829 sym
->attr
.function
= 1;
3830 sym
->attr
.elemental
= 1;
3832 sym
->attr
.referenced
= 1;
3833 gfc_intrinsic_symbol (sym
);
3834 gfc_commit_symbol (sym
);
3837 args
->name
= e
->value
.function
.isym
->formal
->name
;
3838 if (e
->value
.function
.isym
->formal
->next
)
3839 args
->next
->name
= e
->value
.function
.isym
->formal
->next
->name
;
3844 /* Recursively append candidate UOP to CANDIDATES. Store the number of
3845 candidates in CANDIDATES_LEN. */
3847 lookup_uop_fuzzy_find_candidates (gfc_symtree
*uop
,
3849 size_t &candidates_len
)
3856 /* Not sure how to properly filter here. Use all for a start.
3857 n.uop.op is NULL for empty interface operators (is that legal?) disregard
3858 these as i suppose they don't make terribly sense. */
3860 if (uop
->n
.uop
->op
!= NULL
)
3861 vec_push (candidates
, candidates_len
, uop
->name
);
3865 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3869 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3872 /* Lookup user-operator OP fuzzily, taking names in UOP into account. */
3875 lookup_uop_fuzzy (const char *op
, gfc_symtree
*uop
)
3877 char **candidates
= NULL
;
3878 size_t candidates_len
= 0;
3879 lookup_uop_fuzzy_find_candidates (uop
, candidates
, candidates_len
);
3880 return gfc_closest_fuzzy_match (op
, candidates
);
3884 /* Callback finding an impure function as an operand to an .and. or
3885 .or. expression. Remember the last function warned about to
3886 avoid double warnings when recursing. */
3889 impure_function_callback (gfc_expr
**e
, int *walk_subtrees ATTRIBUTE_UNUSED
,
3894 static gfc_expr
*last
= NULL
;
3895 bool *found
= (bool *) data
;
3897 if (f
->expr_type
== EXPR_FUNCTION
)
3900 if (f
!= last
&& !gfc_pure_function (f
, &name
)
3901 && !gfc_implicit_pure_function (f
))
3904 gfc_warning (OPT_Wfunction_elimination
,
3905 "Impure function %qs at %L might not be evaluated",
3908 gfc_warning (OPT_Wfunction_elimination
,
3909 "Impure function at %L might not be evaluated",
3918 /* Return true if TYPE is character based, false otherwise. */
3921 is_character_based (bt type
)
3923 return type
== BT_CHARACTER
|| type
== BT_HOLLERITH
;
3927 /* If expression is a hollerith, convert it to character and issue a warning
3928 for the conversion. */
3931 convert_hollerith_to_character (gfc_expr
*e
)
3933 if (e
->ts
.type
== BT_HOLLERITH
)
3937 t
.type
= BT_CHARACTER
;
3938 t
.kind
= e
->ts
.kind
;
3939 gfc_convert_type_warn (e
, &t
, 2, 1);
3943 /* Convert to numeric and issue a warning for the conversion. */
3946 convert_to_numeric (gfc_expr
*a
, gfc_expr
*b
)
3950 t
.type
= b
->ts
.type
;
3951 t
.kind
= b
->ts
.kind
;
3952 gfc_convert_type_warn (a
, &t
, 2, 1);
3955 /* Resolve an operator expression node. This can involve replacing the
3956 operation with a user defined function call. */
3959 resolve_operator (gfc_expr
*e
)
3961 gfc_expr
*op1
, *op2
;
3963 bool dual_locus_error
;
3966 /* Resolve all subnodes-- give them types. */
3968 switch (e
->value
.op
.op
)
3971 if (!gfc_resolve_expr (e
->value
.op
.op2
))
3977 case INTRINSIC_UPLUS
:
3978 case INTRINSIC_UMINUS
:
3979 case INTRINSIC_PARENTHESES
:
3980 if (!gfc_resolve_expr (e
->value
.op
.op1
))
3983 && e
->value
.op
.op1
->ts
.type
== BT_BOZ
&& !e
->value
.op
.op2
)
3985 gfc_error ("BOZ literal constant at %L cannot be an operand of "
3986 "unary operator %qs", &e
->value
.op
.op1
->where
,
3987 gfc_op2string (e
->value
.op
.op
));
3993 /* Typecheck the new node. */
3995 op1
= e
->value
.op
.op1
;
3996 op2
= e
->value
.op
.op2
;
3997 if (op1
== NULL
&& op2
== NULL
)
4000 dual_locus_error
= false;
4002 /* op1 and op2 cannot both be BOZ. */
4003 if (op1
&& op1
->ts
.type
== BT_BOZ
4004 && op2
&& op2
->ts
.type
== BT_BOZ
)
4006 gfc_error ("Operands at %L and %L cannot appear as operands of "
4007 "binary operator %qs", &op1
->where
, &op2
->where
,
4008 gfc_op2string (e
->value
.op
.op
));
4012 if ((op1
&& op1
->expr_type
== EXPR_NULL
)
4013 || (op2
&& op2
->expr_type
== EXPR_NULL
))
4015 sprintf (msg
, _("Invalid context for NULL() pointer at %%L"));
4019 switch (e
->value
.op
.op
)
4021 case INTRINSIC_UPLUS
:
4022 case INTRINSIC_UMINUS
:
4023 if (op1
->ts
.type
== BT_INTEGER
4024 || op1
->ts
.type
== BT_REAL
4025 || op1
->ts
.type
== BT_COMPLEX
)
4031 sprintf (msg
, _("Operand of unary numeric operator %%<%s%%> at %%L is %s"),
4032 gfc_op2string (e
->value
.op
.op
), gfc_typename (e
));
4035 case INTRINSIC_PLUS
:
4036 case INTRINSIC_MINUS
:
4037 case INTRINSIC_TIMES
:
4038 case INTRINSIC_DIVIDE
:
4039 case INTRINSIC_POWER
:
4040 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
4042 gfc_type_convert_binary (e
, 1);
4046 if (op1
->ts
.type
== BT_DERIVED
|| op2
->ts
.type
== BT_DERIVED
)
4048 _("Unexpected derived-type entities in binary intrinsic "
4049 "numeric operator %%<%s%%> at %%L"),
4050 gfc_op2string (e
->value
.op
.op
));
4053 _("Operands of binary numeric operator %%<%s%%> at %%L are %s/%s"),
4054 gfc_op2string (e
->value
.op
.op
), gfc_typename (op1
),
4055 gfc_typename (op2
));
4058 case INTRINSIC_CONCAT
:
4059 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
4060 && op1
->ts
.kind
== op2
->ts
.kind
)
4062 e
->ts
.type
= BT_CHARACTER
;
4063 e
->ts
.kind
= op1
->ts
.kind
;
4068 _("Operands of string concatenation operator at %%L are %s/%s"),
4069 gfc_typename (op1
), gfc_typename (op2
));
4075 case INTRINSIC_NEQV
:
4076 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
4078 e
->ts
.type
= BT_LOGICAL
;
4079 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
4080 if (op1
->ts
.kind
< e
->ts
.kind
)
4081 gfc_convert_type (op1
, &e
->ts
, 2);
4082 else if (op2
->ts
.kind
< e
->ts
.kind
)
4083 gfc_convert_type (op2
, &e
->ts
, 2);
4085 if (flag_frontend_optimize
&&
4086 (e
->value
.op
.op
== INTRINSIC_AND
|| e
->value
.op
.op
== INTRINSIC_OR
))
4088 /* Warn about short-circuiting
4089 with impure function as second operand. */
4091 gfc_expr_walker (&op2
, impure_function_callback
, &op2_f
);
4096 /* Logical ops on integers become bitwise ops with -fdec. */
4098 && (op1
->ts
.type
== BT_INTEGER
|| op2
->ts
.type
== BT_INTEGER
))
4100 e
->ts
.type
= BT_INTEGER
;
4101 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
4102 if (op1
->ts
.type
!= e
->ts
.type
|| op1
->ts
.kind
!= e
->ts
.kind
)
4103 gfc_convert_type (op1
, &e
->ts
, 1);
4104 if (op2
->ts
.type
!= e
->ts
.type
|| op2
->ts
.kind
!= e
->ts
.kind
)
4105 gfc_convert_type (op2
, &e
->ts
, 1);
4106 e
= logical_to_bitwise (e
);
4110 sprintf (msg
, _("Operands of logical operator %%<%s%%> at %%L are %s/%s"),
4111 gfc_op2string (e
->value
.op
.op
), gfc_typename (op1
),
4112 gfc_typename (op2
));
4117 /* Logical ops on integers become bitwise ops with -fdec. */
4118 if (flag_dec
&& op1
->ts
.type
== BT_INTEGER
)
4120 e
->ts
.type
= BT_INTEGER
;
4121 e
->ts
.kind
= op1
->ts
.kind
;
4122 e
= logical_to_bitwise (e
);
4126 if (op1
->ts
.type
== BT_LOGICAL
)
4128 e
->ts
.type
= BT_LOGICAL
;
4129 e
->ts
.kind
= op1
->ts
.kind
;
4133 sprintf (msg
, _("Operand of .not. operator at %%L is %s"),
4134 gfc_typename (op1
));
4138 case INTRINSIC_GT_OS
:
4140 case INTRINSIC_GE_OS
:
4142 case INTRINSIC_LT_OS
:
4144 case INTRINSIC_LE_OS
:
4145 if (op1
->ts
.type
== BT_COMPLEX
|| op2
->ts
.type
== BT_COMPLEX
)
4147 strcpy (msg
, _("COMPLEX quantities cannot be compared at %L"));
4154 case INTRINSIC_EQ_OS
:
4156 case INTRINSIC_NE_OS
:
4159 && is_character_based (op1
->ts
.type
)
4160 && is_character_based (op2
->ts
.type
))
4162 convert_hollerith_to_character (op1
);
4163 convert_hollerith_to_character (op2
);
4166 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
4167 && op1
->ts
.kind
== op2
->ts
.kind
)
4169 e
->ts
.type
= BT_LOGICAL
;
4170 e
->ts
.kind
= gfc_default_logical_kind
;
4174 /* If op1 is BOZ, then op2 is not!. Try to convert to type of op2. */
4175 if (op1
->ts
.type
== BT_BOZ
)
4177 if (gfc_invalid_boz ("BOZ literal constant near %L cannot appear as "
4178 "an operand of a relational operator",
4182 if (op2
->ts
.type
== BT_INTEGER
&& !gfc_boz2int (op1
, op2
->ts
.kind
))
4185 if (op2
->ts
.type
== BT_REAL
&& !gfc_boz2real (op1
, op2
->ts
.kind
))
4189 /* If op2 is BOZ, then op1 is not!. Try to convert to type of op2. */
4190 if (op2
->ts
.type
== BT_BOZ
)
4192 if (gfc_invalid_boz ("BOZ literal constant near %L cannot appear as "
4193 "an operand of a relational operator",
4197 if (op1
->ts
.type
== BT_INTEGER
&& !gfc_boz2int (op2
, op1
->ts
.kind
))
4200 if (op1
->ts
.type
== BT_REAL
&& !gfc_boz2real (op2
, op1
->ts
.kind
))
4204 && op1
->ts
.type
== BT_HOLLERITH
&& gfc_numeric_ts (&op2
->ts
))
4205 convert_to_numeric (op1
, op2
);
4208 && gfc_numeric_ts (&op1
->ts
) && op2
->ts
.type
== BT_HOLLERITH
)
4209 convert_to_numeric (op2
, op1
);
4211 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
4213 gfc_type_convert_binary (e
, 1);
4215 e
->ts
.type
= BT_LOGICAL
;
4216 e
->ts
.kind
= gfc_default_logical_kind
;
4218 if (warn_compare_reals
)
4220 gfc_intrinsic_op op
= e
->value
.op
.op
;
4222 /* Type conversion has made sure that the types of op1 and op2
4223 agree, so it is only necessary to check the first one. */
4224 if ((op1
->ts
.type
== BT_REAL
|| op1
->ts
.type
== BT_COMPLEX
)
4225 && (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
4226 || op
== INTRINSIC_NE
|| op
== INTRINSIC_NE_OS
))
4230 if (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
)
4231 msg
= "Equality comparison for %s at %L";
4233 msg
= "Inequality comparison for %s at %L";
4235 gfc_warning (OPT_Wcompare_reals
, msg
,
4236 gfc_typename (op1
), &op1
->where
);
4243 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
4245 _("Logicals at %%L must be compared with %s instead of %s"),
4246 (e
->value
.op
.op
== INTRINSIC_EQ
4247 || e
->value
.op
.op
== INTRINSIC_EQ_OS
)
4248 ? ".eqv." : ".neqv.", gfc_op2string (e
->value
.op
.op
));
4251 _("Operands of comparison operator %%<%s%%> at %%L are %s/%s"),
4252 gfc_op2string (e
->value
.op
.op
), gfc_typename (op1
),
4253 gfc_typename (op2
));
4257 case INTRINSIC_USER
:
4258 if (e
->value
.op
.uop
->op
== NULL
)
4260 const char *name
= e
->value
.op
.uop
->name
;
4261 const char *guessed
;
4262 guessed
= lookup_uop_fuzzy (name
, e
->value
.op
.uop
->ns
->uop_root
);
4264 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L; did you mean '%s'?"),
4267 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L"), name
);
4269 else if (op2
== NULL
)
4270 sprintf (msg
, _("Operand of user operator %%<%s%%> at %%L is %s"),
4271 e
->value
.op
.uop
->name
, gfc_typename (op1
));
4274 sprintf (msg
, _("Operands of user operator %%<%s%%> at %%L are %s/%s"),
4275 e
->value
.op
.uop
->name
, gfc_typename (op1
),
4276 gfc_typename (op2
));
4277 e
->value
.op
.uop
->op
->sym
->attr
.referenced
= 1;
4282 case INTRINSIC_PARENTHESES
:
4284 if (e
->ts
.type
== BT_CHARACTER
)
4285 e
->ts
.u
.cl
= op1
->ts
.u
.cl
;
4289 gfc_internal_error ("resolve_operator(): Bad intrinsic");
4292 /* Deal with arrayness of an operand through an operator. */
4294 switch (e
->value
.op
.op
)
4296 case INTRINSIC_PLUS
:
4297 case INTRINSIC_MINUS
:
4298 case INTRINSIC_TIMES
:
4299 case INTRINSIC_DIVIDE
:
4300 case INTRINSIC_POWER
:
4301 case INTRINSIC_CONCAT
:
4305 case INTRINSIC_NEQV
:
4307 case INTRINSIC_EQ_OS
:
4309 case INTRINSIC_NE_OS
:
4311 case INTRINSIC_GT_OS
:
4313 case INTRINSIC_GE_OS
:
4315 case INTRINSIC_LT_OS
:
4317 case INTRINSIC_LE_OS
:
4319 if (op1
->rank
== 0 && op2
->rank
== 0)
4322 if (op1
->rank
== 0 && op2
->rank
!= 0)
4324 e
->rank
= op2
->rank
;
4326 if (e
->shape
== NULL
)
4327 e
->shape
= gfc_copy_shape (op2
->shape
, op2
->rank
);
4330 if (op1
->rank
!= 0 && op2
->rank
== 0)
4332 e
->rank
= op1
->rank
;
4334 if (e
->shape
== NULL
)
4335 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4338 if (op1
->rank
!= 0 && op2
->rank
!= 0)
4340 if (op1
->rank
== op2
->rank
)
4342 e
->rank
= op1
->rank
;
4343 if (e
->shape
== NULL
)
4345 t
= compare_shapes (op1
, op2
);
4349 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4354 /* Allow higher level expressions to work. */
4357 /* Try user-defined operators, and otherwise throw an error. */
4358 dual_locus_error
= true;
4360 _("Inconsistent ranks for operator at %%L and %%L"));
4367 case INTRINSIC_PARENTHESES
:
4369 case INTRINSIC_UPLUS
:
4370 case INTRINSIC_UMINUS
:
4371 /* Simply copy arrayness attribute */
4372 e
->rank
= op1
->rank
;
4374 if (e
->shape
== NULL
)
4375 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4385 /* Attempt to simplify the expression. */
4388 t
= gfc_simplify_expr (e
, 0);
4389 /* Some calls do not succeed in simplification and return false
4390 even though there is no error; e.g. variable references to
4391 PARAMETER arrays. */
4392 if (!gfc_is_constant_expr (e
))
4400 match m
= gfc_extend_expr (e
);
4403 if (m
== MATCH_ERROR
)
4407 if (dual_locus_error
)
4408 gfc_error (msg
, &op1
->where
, &op2
->where
);
4410 gfc_error (msg
, &e
->where
);
4416 /************** Array resolution subroutines **************/
4419 { CMP_LT
, CMP_EQ
, CMP_GT
, CMP_UNKNOWN
};
4421 /* Compare two integer expressions. */
4423 static compare_result
4424 compare_bound (gfc_expr
*a
, gfc_expr
*b
)
4428 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
4429 || b
== NULL
|| b
->expr_type
!= EXPR_CONSTANT
)
4432 /* If either of the types isn't INTEGER, we must have
4433 raised an error earlier. */
4435 if (a
->ts
.type
!= BT_INTEGER
|| b
->ts
.type
!= BT_INTEGER
)
4438 i
= mpz_cmp (a
->value
.integer
, b
->value
.integer
);
4448 /* Compare an integer expression with an integer. */
4450 static compare_result
4451 compare_bound_int (gfc_expr
*a
, int b
)
4455 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4458 if (a
->ts
.type
!= BT_INTEGER
)
4459 gfc_internal_error ("compare_bound_int(): Bad expression");
4461 i
= mpz_cmp_si (a
->value
.integer
, b
);
4471 /* Compare an integer expression with a mpz_t. */
4473 static compare_result
4474 compare_bound_mpz_t (gfc_expr
*a
, mpz_t b
)
4478 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4481 if (a
->ts
.type
!= BT_INTEGER
)
4482 gfc_internal_error ("compare_bound_int(): Bad expression");
4484 i
= mpz_cmp (a
->value
.integer
, b
);
4494 /* Compute the last value of a sequence given by a triplet.
4495 Return 0 if it wasn't able to compute the last value, or if the
4496 sequence if empty, and 1 otherwise. */
4499 compute_last_value_for_triplet (gfc_expr
*start
, gfc_expr
*end
,
4500 gfc_expr
*stride
, mpz_t last
)
4504 if (start
== NULL
|| start
->expr_type
!= EXPR_CONSTANT
4505 || end
== NULL
|| end
->expr_type
!= EXPR_CONSTANT
4506 || (stride
!= NULL
&& stride
->expr_type
!= EXPR_CONSTANT
))
4509 if (start
->ts
.type
!= BT_INTEGER
|| end
->ts
.type
!= BT_INTEGER
4510 || (stride
!= NULL
&& stride
->ts
.type
!= BT_INTEGER
))
4513 if (stride
== NULL
|| compare_bound_int (stride
, 1) == CMP_EQ
)
4515 if (compare_bound (start
, end
) == CMP_GT
)
4517 mpz_set (last
, end
->value
.integer
);
4521 if (compare_bound_int (stride
, 0) == CMP_GT
)
4523 /* Stride is positive */
4524 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) > 0)
4529 /* Stride is negative */
4530 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) < 0)
4535 mpz_sub (rem
, end
->value
.integer
, start
->value
.integer
);
4536 mpz_tdiv_r (rem
, rem
, stride
->value
.integer
);
4537 mpz_sub (last
, end
->value
.integer
, rem
);
4544 /* Compare a single dimension of an array reference to the array
4548 check_dimension (int i
, gfc_array_ref
*ar
, gfc_array_spec
*as
)
4552 if (ar
->dimen_type
[i
] == DIMEN_STAR
)
4554 gcc_assert (ar
->stride
[i
] == NULL
);
4555 /* This implies [*] as [*:] and [*:3] are not possible. */
4556 if (ar
->start
[i
] == NULL
)
4558 gcc_assert (ar
->end
[i
] == NULL
);
4563 /* Given start, end and stride values, calculate the minimum and
4564 maximum referenced indexes. */
4566 switch (ar
->dimen_type
[i
])
4569 case DIMEN_THIS_IMAGE
:
4574 if (compare_bound (ar
->start
[i
], as
->lower
[i
]) == CMP_LT
)
4577 gfc_warning (0, "Array reference at %L is out of bounds "
4578 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4579 mpz_get_si (ar
->start
[i
]->value
.integer
),
4580 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4582 gfc_warning (0, "Array reference at %L is out of bounds "
4583 "(%ld < %ld) in codimension %d", &ar
->c_where
[i
],
4584 mpz_get_si (ar
->start
[i
]->value
.integer
),
4585 mpz_get_si (as
->lower
[i
]->value
.integer
),
4589 if (compare_bound (ar
->start
[i
], as
->upper
[i
]) == CMP_GT
)
4592 gfc_warning (0, "Array reference at %L is out of bounds "
4593 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4594 mpz_get_si (ar
->start
[i
]->value
.integer
),
4595 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4597 gfc_warning (0, "Array reference at %L is out of bounds "
4598 "(%ld > %ld) in codimension %d", &ar
->c_where
[i
],
4599 mpz_get_si (ar
->start
[i
]->value
.integer
),
4600 mpz_get_si (as
->upper
[i
]->value
.integer
),
4609 #define AR_START (ar->start[i] ? ar->start[i] : as->lower[i])
4610 #define AR_END (ar->end[i] ? ar->end[i] : as->upper[i])
4612 compare_result comp_start_end
= compare_bound (AR_START
, AR_END
);
4614 /* Check for zero stride, which is not allowed. */
4615 if (compare_bound_int (ar
->stride
[i
], 0) == CMP_EQ
)
4617 gfc_error ("Illegal stride of zero at %L", &ar
->c_where
[i
]);
4621 /* if start == len || (stride > 0 && start < len)
4622 || (stride < 0 && start > len),
4623 then the array section contains at least one element. In this
4624 case, there is an out-of-bounds access if
4625 (start < lower || start > upper). */
4626 if (compare_bound (AR_START
, AR_END
) == CMP_EQ
4627 || ((compare_bound_int (ar
->stride
[i
], 0) == CMP_GT
4628 || ar
->stride
[i
] == NULL
) && comp_start_end
== CMP_LT
)
4629 || (compare_bound_int (ar
->stride
[i
], 0) == CMP_LT
4630 && comp_start_end
== CMP_GT
))
4632 if (compare_bound (AR_START
, as
->lower
[i
]) == CMP_LT
)
4634 gfc_warning (0, "Lower array reference at %L is out of bounds "
4635 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4636 mpz_get_si (AR_START
->value
.integer
),
4637 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4640 if (compare_bound (AR_START
, as
->upper
[i
]) == CMP_GT
)
4642 gfc_warning (0, "Lower array reference at %L is out of bounds "
4643 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4644 mpz_get_si (AR_START
->value
.integer
),
4645 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4650 /* If we can compute the highest index of the array section,
4651 then it also has to be between lower and upper. */
4652 mpz_init (last_value
);
4653 if (compute_last_value_for_triplet (AR_START
, AR_END
, ar
->stride
[i
],
4656 if (compare_bound_mpz_t (as
->lower
[i
], last_value
) == CMP_GT
)
4658 gfc_warning (0, "Upper array reference at %L is out of bounds "
4659 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4660 mpz_get_si (last_value
),
4661 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4662 mpz_clear (last_value
);
4665 if (compare_bound_mpz_t (as
->upper
[i
], last_value
) == CMP_LT
)
4667 gfc_warning (0, "Upper array reference at %L is out of bounds "
4668 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4669 mpz_get_si (last_value
),
4670 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4671 mpz_clear (last_value
);
4675 mpz_clear (last_value
);
4683 gfc_internal_error ("check_dimension(): Bad array reference");
4690 /* Compare an array reference with an array specification. */
4693 compare_spec_to_ref (gfc_array_ref
*ar
)
4700 /* TODO: Full array sections are only allowed as actual parameters. */
4701 if (as
->type
== AS_ASSUMED_SIZE
4702 && (/*ar->type == AR_FULL
4703 ||*/ (ar
->type
== AR_SECTION
4704 && ar
->dimen_type
[i
] == DIMEN_RANGE
&& ar
->end
[i
] == NULL
)))
4706 gfc_error ("Rightmost upper bound of assumed size array section "
4707 "not specified at %L", &ar
->where
);
4711 if (ar
->type
== AR_FULL
)
4714 if (as
->rank
!= ar
->dimen
)
4716 gfc_error ("Rank mismatch in array reference at %L (%d/%d)",
4717 &ar
->where
, ar
->dimen
, as
->rank
);
4721 /* ar->codimen == 0 is a local array. */
4722 if (as
->corank
!= ar
->codimen
&& ar
->codimen
!= 0)
4724 gfc_error ("Coindex rank mismatch in array reference at %L (%d/%d)",
4725 &ar
->where
, ar
->codimen
, as
->corank
);
4729 for (i
= 0; i
< as
->rank
; i
++)
4730 if (!check_dimension (i
, ar
, as
))
4733 /* Local access has no coarray spec. */
4734 if (ar
->codimen
!= 0)
4735 for (i
= as
->rank
; i
< as
->rank
+ as
->corank
; i
++)
4737 if (ar
->dimen_type
[i
] != DIMEN_ELEMENT
&& !ar
->in_allocate
4738 && ar
->dimen_type
[i
] != DIMEN_THIS_IMAGE
)
4740 gfc_error ("Coindex of codimension %d must be a scalar at %L",
4741 i
+ 1 - as
->rank
, &ar
->where
);
4744 if (!check_dimension (i
, ar
, as
))
4752 /* Resolve one part of an array index. */
4755 gfc_resolve_index_1 (gfc_expr
*index
, int check_scalar
,
4756 int force_index_integer_kind
)
4763 if (!gfc_resolve_expr (index
))
4766 if (check_scalar
&& index
->rank
!= 0)
4768 gfc_error ("Array index at %L must be scalar", &index
->where
);
4772 if (index
->ts
.type
!= BT_INTEGER
&& index
->ts
.type
!= BT_REAL
)
4774 gfc_error ("Array index at %L must be of INTEGER type, found %s",
4775 &index
->where
, gfc_basic_typename (index
->ts
.type
));
4779 if (index
->ts
.type
== BT_REAL
)
4780 if (!gfc_notify_std (GFC_STD_LEGACY
, "REAL array index at %L",
4784 if ((index
->ts
.kind
!= gfc_index_integer_kind
4785 && force_index_integer_kind
)
4786 || index
->ts
.type
!= BT_INTEGER
)
4789 ts
.type
= BT_INTEGER
;
4790 ts
.kind
= gfc_index_integer_kind
;
4792 gfc_convert_type_warn (index
, &ts
, 2, 0);
4798 /* Resolve one part of an array index. */
4801 gfc_resolve_index (gfc_expr
*index
, int check_scalar
)
4803 return gfc_resolve_index_1 (index
, check_scalar
, 1);
4806 /* Resolve a dim argument to an intrinsic function. */
4809 gfc_resolve_dim_arg (gfc_expr
*dim
)
4814 if (!gfc_resolve_expr (dim
))
4819 gfc_error ("Argument dim at %L must be scalar", &dim
->where
);
4824 if (dim
->ts
.type
!= BT_INTEGER
)
4826 gfc_error ("Argument dim at %L must be of INTEGER type", &dim
->where
);
4830 if (dim
->ts
.kind
!= gfc_index_integer_kind
)
4835 ts
.type
= BT_INTEGER
;
4836 ts
.kind
= gfc_index_integer_kind
;
4838 gfc_convert_type_warn (dim
, &ts
, 2, 0);
4844 /* Given an expression that contains array references, update those array
4845 references to point to the right array specifications. While this is
4846 filled in during matching, this information is difficult to save and load
4847 in a module, so we take care of it here.
4849 The idea here is that the original array reference comes from the
4850 base symbol. We traverse the list of reference structures, setting
4851 the stored reference to references. Component references can
4852 provide an additional array specification. */
4855 find_array_spec (gfc_expr
*e
)
4860 bool class_as
= false;
4862 if (e
->symtree
->n
.sym
->ts
.type
== BT_CLASS
)
4864 as
= CLASS_DATA (e
->symtree
->n
.sym
)->as
;
4868 as
= e
->symtree
->n
.sym
->as
;
4870 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4875 gfc_internal_error ("find_array_spec(): Missing spec");
4882 c
= ref
->u
.c
.component
;
4883 if (c
->attr
.dimension
)
4885 if (as
!= NULL
&& !(class_as
&& as
== c
->as
))
4886 gfc_internal_error ("find_array_spec(): unused as(1)");
4898 gfc_internal_error ("find_array_spec(): unused as(2)");
4902 /* Resolve an array reference. */
4905 resolve_array_ref (gfc_array_ref
*ar
)
4907 int i
, check_scalar
;
4910 for (i
= 0; i
< ar
->dimen
+ ar
->codimen
; i
++)
4912 check_scalar
= ar
->dimen_type
[i
] == DIMEN_RANGE
;
4914 /* Do not force gfc_index_integer_kind for the start. We can
4915 do fine with any integer kind. This avoids temporary arrays
4916 created for indexing with a vector. */
4917 if (!gfc_resolve_index_1 (ar
->start
[i
], check_scalar
, 0))
4919 if (!gfc_resolve_index (ar
->end
[i
], check_scalar
))
4921 if (!gfc_resolve_index (ar
->stride
[i
], check_scalar
))
4926 if (ar
->dimen_type
[i
] == DIMEN_UNKNOWN
)
4930 ar
->dimen_type
[i
] = DIMEN_ELEMENT
;
4934 ar
->dimen_type
[i
] = DIMEN_VECTOR
;
4935 if (e
->expr_type
== EXPR_VARIABLE
4936 && e
->symtree
->n
.sym
->ts
.type
== BT_DERIVED
)
4937 ar
->start
[i
] = gfc_get_parentheses (e
);
4941 gfc_error ("Array index at %L is an array of rank %d",
4942 &ar
->c_where
[i
], e
->rank
);
4946 /* Fill in the upper bound, which may be lower than the
4947 specified one for something like a(2:10:5), which is
4948 identical to a(2:7:5). Only relevant for strides not equal
4949 to one. Don't try a division by zero. */
4950 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4951 && ar
->stride
[i
] != NULL
&& ar
->stride
[i
]->expr_type
== EXPR_CONSTANT
4952 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 1L) != 0
4953 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 0L) != 0)
4957 if (gfc_ref_dimen_size (ar
, i
, &size
, &end
))
4959 if (ar
->end
[i
] == NULL
)
4962 gfc_get_constant_expr (BT_INTEGER
, gfc_index_integer_kind
,
4964 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4966 else if (ar
->end
[i
]->ts
.type
== BT_INTEGER
4967 && ar
->end
[i
]->expr_type
== EXPR_CONSTANT
)
4969 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4980 if (ar
->type
== AR_FULL
)
4982 if (ar
->as
->rank
== 0)
4983 ar
->type
= AR_ELEMENT
;
4985 /* Make sure array is the same as array(:,:), this way
4986 we don't need to special case all the time. */
4987 ar
->dimen
= ar
->as
->rank
;
4988 for (i
= 0; i
< ar
->dimen
; i
++)
4990 ar
->dimen_type
[i
] = DIMEN_RANGE
;
4992 gcc_assert (ar
->start
[i
] == NULL
);
4993 gcc_assert (ar
->end
[i
] == NULL
);
4994 gcc_assert (ar
->stride
[i
] == NULL
);
4998 /* If the reference type is unknown, figure out what kind it is. */
5000 if (ar
->type
== AR_UNKNOWN
)
5002 ar
->type
= AR_ELEMENT
;
5003 for (i
= 0; i
< ar
->dimen
; i
++)
5004 if (ar
->dimen_type
[i
] == DIMEN_RANGE
5005 || ar
->dimen_type
[i
] == DIMEN_VECTOR
)
5007 ar
->type
= AR_SECTION
;
5012 if (!ar
->as
->cray_pointee
&& !compare_spec_to_ref (ar
))
5015 if (ar
->as
->corank
&& ar
->codimen
== 0)
5018 ar
->codimen
= ar
->as
->corank
;
5019 for (n
= ar
->dimen
; n
< ar
->dimen
+ ar
->codimen
; n
++)
5020 ar
->dimen_type
[n
] = DIMEN_THIS_IMAGE
;
5028 resolve_substring (gfc_ref
*ref
, bool *equal_length
)
5030 int k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
5032 if (ref
->u
.ss
.start
!= NULL
)
5034 if (!gfc_resolve_expr (ref
->u
.ss
.start
))
5037 if (ref
->u
.ss
.start
->ts
.type
!= BT_INTEGER
)
5039 gfc_error ("Substring start index at %L must be of type INTEGER",
5040 &ref
->u
.ss
.start
->where
);
5044 if (ref
->u
.ss
.start
->rank
!= 0)
5046 gfc_error ("Substring start index at %L must be scalar",
5047 &ref
->u
.ss
.start
->where
);
5051 if (compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_LT
5052 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
5053 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
5055 gfc_error ("Substring start index at %L is less than one",
5056 &ref
->u
.ss
.start
->where
);
5061 if (ref
->u
.ss
.end
!= NULL
)
5063 if (!gfc_resolve_expr (ref
->u
.ss
.end
))
5066 if (ref
->u
.ss
.end
->ts
.type
!= BT_INTEGER
)
5068 gfc_error ("Substring end index at %L must be of type INTEGER",
5069 &ref
->u
.ss
.end
->where
);
5073 if (ref
->u
.ss
.end
->rank
!= 0)
5075 gfc_error ("Substring end index at %L must be scalar",
5076 &ref
->u
.ss
.end
->where
);
5080 if (ref
->u
.ss
.length
!= NULL
5081 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_GT
5082 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
5083 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
5085 gfc_error ("Substring end index at %L exceeds the string length",
5086 &ref
->u
.ss
.start
->where
);
5090 if (compare_bound_mpz_t (ref
->u
.ss
.end
,
5091 gfc_integer_kinds
[k
].huge
) == CMP_GT
5092 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
5093 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
5095 gfc_error ("Substring end index at %L is too large",
5096 &ref
->u
.ss
.end
->where
);
5099 /* If the substring has the same length as the original
5100 variable, the reference itself can be deleted. */
5102 if (ref
->u
.ss
.length
!= NULL
5103 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_EQ
5104 && compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_EQ
)
5105 *equal_length
= true;
5112 /* This function supplies missing substring charlens. */
5115 gfc_resolve_substring_charlen (gfc_expr
*e
)
5118 gfc_expr
*start
, *end
;
5119 gfc_typespec
*ts
= NULL
;
5122 for (char_ref
= e
->ref
; char_ref
; char_ref
= char_ref
->next
)
5124 if (char_ref
->type
== REF_SUBSTRING
|| char_ref
->type
== REF_INQUIRY
)
5126 if (char_ref
->type
== REF_COMPONENT
)
5127 ts
= &char_ref
->u
.c
.component
->ts
;
5130 if (!char_ref
|| char_ref
->type
== REF_INQUIRY
)
5133 gcc_assert (char_ref
->next
== NULL
);
5137 if (e
->ts
.u
.cl
->length
)
5138 gfc_free_expr (e
->ts
.u
.cl
->length
);
5139 else if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
->attr
.dummy
)
5143 e
->ts
.type
= BT_CHARACTER
;
5144 e
->ts
.kind
= gfc_default_character_kind
;
5147 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5149 if (char_ref
->u
.ss
.start
)
5150 start
= gfc_copy_expr (char_ref
->u
.ss
.start
);
5152 start
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 1);
5154 if (char_ref
->u
.ss
.end
)
5155 end
= gfc_copy_expr (char_ref
->u
.ss
.end
);
5156 else if (e
->expr_type
== EXPR_VARIABLE
)
5159 ts
= &e
->symtree
->n
.sym
->ts
;
5160 end
= gfc_copy_expr (ts
->u
.cl
->length
);
5167 gfc_free_expr (start
);
5168 gfc_free_expr (end
);
5172 /* Length = (end - start + 1).
5173 Check first whether it has a constant length. */
5174 if (gfc_dep_difference (end
, start
, &diff
))
5176 gfc_expr
*len
= gfc_get_constant_expr (BT_INTEGER
, gfc_charlen_int_kind
,
5179 mpz_add_ui (len
->value
.integer
, diff
, 1);
5181 e
->ts
.u
.cl
->length
= len
;
5182 /* The check for length < 0 is handled below */
5186 e
->ts
.u
.cl
->length
= gfc_subtract (end
, start
);
5187 e
->ts
.u
.cl
->length
= gfc_add (e
->ts
.u
.cl
->length
,
5188 gfc_get_int_expr (gfc_charlen_int_kind
,
5192 /* F2008, 6.4.1: Both the starting point and the ending point shall
5193 be within the range 1, 2, ..., n unless the starting point exceeds
5194 the ending point, in which case the substring has length zero. */
5196 if (mpz_cmp_si (e
->ts
.u
.cl
->length
->value
.integer
, 0) < 0)
5197 mpz_set_si (e
->ts
.u
.cl
->length
->value
.integer
, 0);
5199 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5200 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5202 /* Make sure that the length is simplified. */
5203 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 1);
5204 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5208 /* Resolve subtype references. */
5211 gfc_resolve_ref (gfc_expr
*expr
)
5213 int current_part_dimension
, n_components
, seen_part_dimension
, dim
;
5214 gfc_ref
*ref
, **prev
, *array_ref
;
5217 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5218 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.as
== NULL
)
5220 find_array_spec (expr
);
5224 for (prev
= &expr
->ref
; *prev
!= NULL
;
5225 prev
= *prev
== NULL
? prev
: &(*prev
)->next
)
5226 switch ((*prev
)->type
)
5229 if (!resolve_array_ref (&(*prev
)->u
.ar
))
5238 equal_length
= false;
5239 if (!resolve_substring (*prev
, &equal_length
))
5242 if (expr
->expr_type
!= EXPR_SUBSTRING
&& equal_length
)
5244 /* Remove the reference and move the charlen, if any. */
5248 expr
->ts
.u
.cl
= ref
->u
.ss
.length
;
5249 ref
->u
.ss
.length
= NULL
;
5250 gfc_free_ref_list (ref
);
5255 /* Check constraints on part references. */
5257 current_part_dimension
= 0;
5258 seen_part_dimension
= 0;
5262 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5268 switch (ref
->u
.ar
.type
)
5271 /* Coarray scalar. */
5272 if (ref
->u
.ar
.as
->rank
== 0)
5274 current_part_dimension
= 0;
5279 current_part_dimension
= 1;
5284 current_part_dimension
= 0;
5288 gfc_internal_error ("resolve_ref(): Bad array reference");
5294 if (current_part_dimension
|| seen_part_dimension
)
5297 if (ref
->u
.c
.component
->attr
.pointer
5298 || ref
->u
.c
.component
->attr
.proc_pointer
5299 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5300 && CLASS_DATA (ref
->u
.c
.component
)->attr
.pointer
))
5302 gfc_error ("Component to the right of a part reference "
5303 "with nonzero rank must not have the POINTER "
5304 "attribute at %L", &expr
->where
);
5307 else if (ref
->u
.c
.component
->attr
.allocatable
5308 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5309 && CLASS_DATA (ref
->u
.c
.component
)->attr
.allocatable
))
5312 gfc_error ("Component to the right of a part reference "
5313 "with nonzero rank must not have the ALLOCATABLE "
5314 "attribute at %L", &expr
->where
);
5326 /* Implement requirement in note 9.7 of F2018 that the result of the
5327 LEN inquiry be a scalar. */
5328 if (ref
->u
.i
== INQUIRY_LEN
&& array_ref
&& expr
->ts
.deferred
)
5330 array_ref
->u
.ar
.type
= AR_ELEMENT
;
5332 /* INQUIRY_LEN is not evaluated from the rest of the expr
5333 but directly from the string length. This means that setting
5334 the array indices to one does not matter but might trigger
5335 a runtime bounds error. Suppress the check. */
5336 expr
->no_bounds_check
= 1;
5337 for (dim
= 0; dim
< array_ref
->u
.ar
.dimen
; dim
++)
5339 array_ref
->u
.ar
.dimen_type
[dim
] = DIMEN_ELEMENT
;
5340 if (array_ref
->u
.ar
.start
[dim
])
5341 gfc_free_expr (array_ref
->u
.ar
.start
[dim
]);
5342 array_ref
->u
.ar
.start
[dim
]
5343 = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
5344 if (array_ref
->u
.ar
.end
[dim
])
5345 gfc_free_expr (array_ref
->u
.ar
.end
[dim
]);
5346 if (array_ref
->u
.ar
.stride
[dim
])
5347 gfc_free_expr (array_ref
->u
.ar
.stride
[dim
]);
5353 if (((ref
->type
== REF_COMPONENT
&& n_components
> 1)
5354 || ref
->next
== NULL
)
5355 && current_part_dimension
5356 && seen_part_dimension
)
5358 gfc_error ("Two or more part references with nonzero rank must "
5359 "not be specified at %L", &expr
->where
);
5363 if (ref
->type
== REF_COMPONENT
)
5365 if (current_part_dimension
)
5366 seen_part_dimension
= 1;
5368 /* reset to make sure */
5369 current_part_dimension
= 0;
5377 /* Given an expression, determine its shape. This is easier than it sounds.
5378 Leaves the shape array NULL if it is not possible to determine the shape. */
5381 expression_shape (gfc_expr
*e
)
5383 mpz_t array
[GFC_MAX_DIMENSIONS
];
5386 if (e
->rank
<= 0 || e
->shape
!= NULL
)
5389 for (i
= 0; i
< e
->rank
; i
++)
5390 if (!gfc_array_dimen_size (e
, i
, &array
[i
]))
5393 e
->shape
= gfc_get_shape (e
->rank
);
5395 memcpy (e
->shape
, array
, e
->rank
* sizeof (mpz_t
));
5400 for (i
--; i
>= 0; i
--)
5401 mpz_clear (array
[i
]);
5405 /* Given a variable expression node, compute the rank of the expression by
5406 examining the base symbol and any reference structures it may have. */
5409 gfc_expression_rank (gfc_expr
*e
)
5414 /* Just to make sure, because EXPR_COMPCALL's also have an e->ref and that
5415 could lead to serious confusion... */
5416 gcc_assert (e
->expr_type
!= EXPR_COMPCALL
);
5420 if (e
->expr_type
== EXPR_ARRAY
)
5422 /* Constructors can have a rank different from one via RESHAPE(). */
5424 e
->rank
= ((e
->symtree
== NULL
|| e
->symtree
->n
.sym
->as
== NULL
)
5425 ? 0 : e
->symtree
->n
.sym
->as
->rank
);
5431 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5433 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.proc_pointer
5434 && ref
->u
.c
.component
->attr
.function
&& !ref
->next
)
5435 rank
= ref
->u
.c
.component
->as
? ref
->u
.c
.component
->as
->rank
: 0;
5437 if (ref
->type
!= REF_ARRAY
)
5440 if (ref
->u
.ar
.type
== AR_FULL
)
5442 rank
= ref
->u
.ar
.as
->rank
;
5446 if (ref
->u
.ar
.type
== AR_SECTION
)
5448 /* Figure out the rank of the section. */
5450 gfc_internal_error ("gfc_expression_rank(): Two array specs");
5452 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
5453 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_RANGE
5454 || ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
)
5464 expression_shape (e
);
5469 add_caf_get_intrinsic (gfc_expr
*e
)
5471 gfc_expr
*wrapper
, *tmp_expr
;
5475 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5476 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5481 for (n
= ref
->u
.ar
.dimen
; n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
5482 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_ELEMENT
)
5485 tmp_expr
= XCNEW (gfc_expr
);
5487 wrapper
= gfc_build_intrinsic_call (gfc_current_ns
, GFC_ISYM_CAF_GET
,
5488 "caf_get", tmp_expr
->where
, 1, tmp_expr
);
5489 wrapper
->ts
= e
->ts
;
5490 wrapper
->rank
= e
->rank
;
5492 wrapper
->shape
= gfc_copy_shape (e
->shape
, e
->rank
);
5499 remove_caf_get_intrinsic (gfc_expr
*e
)
5501 gcc_assert (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
5502 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
);
5503 gfc_expr
*e2
= e
->value
.function
.actual
->expr
;
5504 e
->value
.function
.actual
->expr
= NULL
;
5505 gfc_free_actual_arglist (e
->value
.function
.actual
);
5506 gfc_free_shape (&e
->shape
, e
->rank
);
5512 /* Resolve a variable expression. */
5515 resolve_variable (gfc_expr
*e
)
5522 if (e
->symtree
== NULL
)
5524 sym
= e
->symtree
->n
.sym
;
5526 /* Use same check as for TYPE(*) below; this check has to be before TYPE(*)
5527 as ts.type is set to BT_ASSUMED in resolve_symbol. */
5528 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
5530 if (!actual_arg
|| inquiry_argument
)
5532 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may only "
5533 "be used as actual argument", sym
->name
, &e
->where
);
5537 /* TS 29113, 407b. */
5538 else if (e
->ts
.type
== BT_ASSUMED
)
5542 gfc_error ("Assumed-type variable %s at %L may only be used "
5543 "as actual argument", sym
->name
, &e
->where
);
5546 else if (inquiry_argument
&& !first_actual_arg
)
5548 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5549 for all inquiry functions in resolve_function; the reason is
5550 that the function-name resolution happens too late in that
5552 gfc_error ("Assumed-type variable %s at %L as actual argument to "
5553 "an inquiry function shall be the first argument",
5554 sym
->name
, &e
->where
);
5558 /* TS 29113, C535b. */
5559 else if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5560 && CLASS_DATA (sym
)->as
5561 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5562 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5563 && sym
->as
->type
== AS_ASSUMED_RANK
))
5564 && !sym
->attr
.select_rank_temporary
)
5567 && !(cs_base
&& cs_base
->current
5568 && cs_base
->current
->op
== EXEC_SELECT_RANK
))
5570 gfc_error ("Assumed-rank variable %s at %L may only be used as "
5571 "actual argument", sym
->name
, &e
->where
);
5574 else if (inquiry_argument
&& !first_actual_arg
)
5576 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5577 for all inquiry functions in resolve_function; the reason is
5578 that the function-name resolution happens too late in that
5580 gfc_error ("Assumed-rank variable %s at %L as actual argument "
5581 "to an inquiry function shall be the first argument",
5582 sym
->name
, &e
->where
);
5587 if ((sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
)) && e
->ref
5588 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5589 && e
->ref
->next
== NULL
))
5591 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall not have "
5592 "a subobject reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5595 /* TS 29113, 407b. */
5596 else if (e
->ts
.type
== BT_ASSUMED
&& e
->ref
5597 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5598 && e
->ref
->next
== NULL
))
5600 gfc_error ("Assumed-type variable %s at %L shall not have a subobject "
5601 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5605 /* TS 29113, C535b. */
5606 if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5607 && CLASS_DATA (sym
)->as
5608 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5609 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5610 && sym
->as
->type
== AS_ASSUMED_RANK
))
5612 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5613 && e
->ref
->next
== NULL
))
5615 gfc_error ("Assumed-rank variable %s at %L shall not have a subobject "
5616 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5620 /* For variables that are used in an associate (target => object) where
5621 the object's basetype is array valued while the target is scalar,
5622 the ts' type of the component refs is still array valued, which
5623 can't be translated that way. */
5624 if (sym
->assoc
&& e
->rank
== 0 && e
->ref
&& sym
->ts
.type
== BT_CLASS
5625 && sym
->assoc
->target
&& sym
->assoc
->target
->ts
.type
== BT_CLASS
5626 && CLASS_DATA (sym
->assoc
->target
)->as
)
5628 gfc_ref
*ref
= e
->ref
;
5634 ref
->u
.c
.sym
= sym
->ts
.u
.derived
;
5635 /* Stop the loop. */
5645 /* If this is an associate-name, it may be parsed with an array reference
5646 in error even though the target is scalar. Fail directly in this case.
5647 TODO Understand why class scalar expressions must be excluded. */
5648 if (sym
->assoc
&& !(sym
->ts
.type
== BT_CLASS
&& e
->rank
== 0))
5650 if (sym
->ts
.type
== BT_CLASS
)
5651 gfc_fix_class_refs (e
);
5652 if (!sym
->attr
.dimension
&& e
->ref
&& e
->ref
->type
== REF_ARRAY
)
5654 else if (sym
->attr
.dimension
&& (!e
->ref
|| e
->ref
->type
!= REF_ARRAY
))
5656 /* This can happen because the parser did not detect that the
5657 associate name is an array and the expression had no array
5659 gfc_ref
*ref
= gfc_get_ref ();
5660 ref
->type
= REF_ARRAY
;
5661 ref
->u
.ar
= *gfc_get_array_ref();
5662 ref
->u
.ar
.type
= AR_FULL
;
5665 ref
->u
.ar
.as
= sym
->as
;
5666 ref
->u
.ar
.dimen
= sym
->as
->rank
;
5674 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.generic
)
5675 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
5677 /* On the other hand, the parser may not have known this is an array;
5678 in this case, we have to add a FULL reference. */
5679 if (sym
->assoc
&& sym
->attr
.dimension
&& !e
->ref
)
5681 e
->ref
= gfc_get_ref ();
5682 e
->ref
->type
= REF_ARRAY
;
5683 e
->ref
->u
.ar
.type
= AR_FULL
;
5684 e
->ref
->u
.ar
.dimen
= 0;
5687 /* Like above, but for class types, where the checking whether an array
5688 ref is present is more complicated. Furthermore make sure not to add
5689 the full array ref to _vptr or _len refs. */
5690 if (sym
->assoc
&& sym
->ts
.type
== BT_CLASS
5691 && CLASS_DATA (sym
)->attr
.dimension
5692 && (e
->ts
.type
!= BT_DERIVED
|| !e
->ts
.u
.derived
->attr
.vtype
))
5694 gfc_ref
*ref
, *newref
;
5696 newref
= gfc_get_ref ();
5697 newref
->type
= REF_ARRAY
;
5698 newref
->u
.ar
.type
= AR_FULL
;
5699 newref
->u
.ar
.dimen
= 0;
5700 /* Because this is an associate var and the first ref either is a ref to
5701 the _data component or not, no traversal of the ref chain is
5702 needed. The array ref needs to be inserted after the _data ref,
5703 or when that is not present, which may happend for polymorphic
5704 types, then at the first position. */
5708 else if (ref
->type
== REF_COMPONENT
5709 && strcmp ("_data", ref
->u
.c
.component
->name
) == 0)
5711 if (!ref
->next
|| ref
->next
->type
!= REF_ARRAY
)
5713 newref
->next
= ref
->next
;
5717 /* Array ref present already. */
5718 gfc_free_ref_list (newref
);
5720 else if (ref
->type
== REF_ARRAY
)
5721 /* Array ref present already. */
5722 gfc_free_ref_list (newref
);
5730 if (e
->ref
&& !gfc_resolve_ref (e
))
5733 if (sym
->attr
.flavor
== FL_PROCEDURE
5734 && (!sym
->attr
.function
5735 || (sym
->attr
.function
&& sym
->result
5736 && sym
->result
->attr
.proc_pointer
5737 && !sym
->result
->attr
.function
)))
5739 e
->ts
.type
= BT_PROCEDURE
;
5740 goto resolve_procedure
;
5743 if (sym
->ts
.type
!= BT_UNKNOWN
)
5744 gfc_variable_attr (e
, &e
->ts
);
5745 else if (sym
->attr
.flavor
== FL_PROCEDURE
5746 && sym
->attr
.function
&& sym
->result
5747 && sym
->result
->ts
.type
!= BT_UNKNOWN
5748 && sym
->result
->attr
.proc_pointer
)
5749 e
->ts
= sym
->result
->ts
;
5752 /* Must be a simple variable reference. */
5753 if (!gfc_set_default_type (sym
, 1, sym
->ns
))
5758 if (check_assumed_size_reference (sym
, e
))
5761 /* Deal with forward references to entries during gfc_resolve_code, to
5762 satisfy, at least partially, 12.5.2.5. */
5763 if (gfc_current_ns
->entries
5764 && current_entry_id
== sym
->entry_id
5767 && cs_base
->current
->op
!= EXEC_ENTRY
)
5769 gfc_entry_list
*entry
;
5770 gfc_formal_arglist
*formal
;
5772 bool seen
, saved_specification_expr
;
5774 /* If the symbol is a dummy... */
5775 if (sym
->attr
.dummy
&& sym
->ns
== gfc_current_ns
)
5777 entry
= gfc_current_ns
->entries
;
5780 /* ...test if the symbol is a parameter of previous entries. */
5781 for (; entry
&& entry
->id
<= current_entry_id
; entry
= entry
->next
)
5782 for (formal
= entry
->sym
->formal
; formal
; formal
= formal
->next
)
5784 if (formal
->sym
&& sym
->name
== formal
->sym
->name
)
5791 /* If it has not been seen as a dummy, this is an error. */
5794 if (specification_expr
)
5795 gfc_error ("Variable %qs, used in a specification expression"
5796 ", is referenced at %L before the ENTRY statement "
5797 "in which it is a parameter",
5798 sym
->name
, &cs_base
->current
->loc
);
5800 gfc_error ("Variable %qs is used at %L before the ENTRY "
5801 "statement in which it is a parameter",
5802 sym
->name
, &cs_base
->current
->loc
);
5807 /* Now do the same check on the specification expressions. */
5808 saved_specification_expr
= specification_expr
;
5809 specification_expr
= true;
5810 if (sym
->ts
.type
== BT_CHARACTER
5811 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
5815 for (n
= 0; n
< sym
->as
->rank
; n
++)
5817 if (!gfc_resolve_expr (sym
->as
->lower
[n
]))
5819 if (!gfc_resolve_expr (sym
->as
->upper
[n
]))
5822 specification_expr
= saved_specification_expr
;
5825 /* Update the symbol's entry level. */
5826 sym
->entry_id
= current_entry_id
+ 1;
5829 /* If a symbol has been host_associated mark it. This is used latter,
5830 to identify if aliasing is possible via host association. */
5831 if (sym
->attr
.flavor
== FL_VARIABLE
5832 && gfc_current_ns
->parent
5833 && (gfc_current_ns
->parent
== sym
->ns
5834 || (gfc_current_ns
->parent
->parent
5835 && gfc_current_ns
->parent
->parent
== sym
->ns
)))
5836 sym
->attr
.host_assoc
= 1;
5838 if (gfc_current_ns
->proc_name
5839 && sym
->attr
.dimension
5840 && (sym
->ns
!= gfc_current_ns
5841 || sym
->attr
.use_assoc
5842 || sym
->attr
.in_common
))
5843 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
5846 if (t
&& !resolve_procedure_expression (e
))
5849 /* F2008, C617 and C1229. */
5850 if (!inquiry_argument
&& (e
->ts
.type
== BT_CLASS
|| e
->ts
.type
== BT_DERIVED
)
5851 && gfc_is_coindexed (e
))
5853 gfc_ref
*ref
, *ref2
= NULL
;
5855 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5857 if (ref
->type
== REF_COMPONENT
)
5859 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5863 for ( ; ref
; ref
= ref
->next
)
5864 if (ref
->type
== REF_COMPONENT
)
5867 /* Expression itself is not coindexed object. */
5868 if (ref
&& e
->ts
.type
== BT_CLASS
)
5870 gfc_error ("Polymorphic subobject of coindexed object at %L",
5875 /* Expression itself is coindexed object. */
5879 c
= ref2
? ref2
->u
.c
.component
: e
->symtree
->n
.sym
->components
;
5880 for ( ; c
; c
= c
->next
)
5881 if (c
->attr
.allocatable
&& c
->ts
.type
== BT_CLASS
)
5883 gfc_error ("Coindexed object with polymorphic allocatable "
5884 "subcomponent at %L", &e
->where
);
5892 gfc_expression_rank (e
);
5894 if (t
&& flag_coarray
== GFC_FCOARRAY_LIB
&& gfc_is_coindexed (e
))
5895 add_caf_get_intrinsic (e
);
5897 /* Simplify cases where access to a parameter array results in a
5898 single constant. Suppress errors since those will have been
5899 issued before, as warnings. */
5900 if (e
->rank
== 0 && sym
->as
&& sym
->attr
.flavor
== FL_PARAMETER
)
5902 gfc_push_suppress_errors ();
5903 gfc_simplify_expr (e
, 1);
5904 gfc_pop_suppress_errors ();
5911 /* Checks to see that the correct symbol has been host associated.
5912 The only situation where this arises is that in which a twice
5913 contained function is parsed after the host association is made.
5914 Therefore, on detecting this, change the symbol in the expression
5915 and convert the array reference into an actual arglist if the old
5916 symbol is a variable. */
5918 check_host_association (gfc_expr
*e
)
5920 gfc_symbol
*sym
, *old_sym
;
5924 gfc_actual_arglist
*arg
, *tail
= NULL
;
5925 bool retval
= e
->expr_type
== EXPR_FUNCTION
;
5927 /* If the expression is the result of substitution in
5928 interface.c(gfc_extend_expr) because there is no way in
5929 which the host association can be wrong. */
5930 if (e
->symtree
== NULL
5931 || e
->symtree
->n
.sym
== NULL
5932 || e
->user_operator
)
5935 old_sym
= e
->symtree
->n
.sym
;
5937 if (gfc_current_ns
->parent
5938 && old_sym
->ns
!= gfc_current_ns
)
5940 /* Use the 'USE' name so that renamed module symbols are
5941 correctly handled. */
5942 gfc_find_symbol (e
->symtree
->name
, gfc_current_ns
, 1, &sym
);
5944 if (sym
&& old_sym
!= sym
5945 && sym
->ts
.type
== old_sym
->ts
.type
5946 && sym
->attr
.flavor
== FL_PROCEDURE
5947 && sym
->attr
.contained
)
5949 /* Clear the shape, since it might not be valid. */
5950 gfc_free_shape (&e
->shape
, e
->rank
);
5952 /* Give the expression the right symtree! */
5953 gfc_find_sym_tree (e
->symtree
->name
, NULL
, 1, &st
);
5954 gcc_assert (st
!= NULL
);
5956 if (old_sym
->attr
.flavor
== FL_PROCEDURE
5957 || e
->expr_type
== EXPR_FUNCTION
)
5959 /* Original was function so point to the new symbol, since
5960 the actual argument list is already attached to the
5962 e
->value
.function
.esym
= NULL
;
5967 /* Original was variable so convert array references into
5968 an actual arglist. This does not need any checking now
5969 since resolve_function will take care of it. */
5970 e
->value
.function
.actual
= NULL
;
5971 e
->expr_type
= EXPR_FUNCTION
;
5974 /* Ambiguity will not arise if the array reference is not
5975 the last reference. */
5976 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5977 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
5980 gcc_assert (ref
->type
== REF_ARRAY
);
5982 /* Grab the start expressions from the array ref and
5983 copy them into actual arguments. */
5984 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
5986 arg
= gfc_get_actual_arglist ();
5987 arg
->expr
= gfc_copy_expr (ref
->u
.ar
.start
[n
]);
5988 if (e
->value
.function
.actual
== NULL
)
5989 tail
= e
->value
.function
.actual
= arg
;
5997 /* Dump the reference list and set the rank. */
5998 gfc_free_ref_list (e
->ref
);
6000 e
->rank
= sym
->as
? sym
->as
->rank
: 0;
6003 gfc_resolve_expr (e
);
6007 /* This might have changed! */
6008 return e
->expr_type
== EXPR_FUNCTION
;
6013 gfc_resolve_character_operator (gfc_expr
*e
)
6015 gfc_expr
*op1
= e
->value
.op
.op1
;
6016 gfc_expr
*op2
= e
->value
.op
.op2
;
6017 gfc_expr
*e1
= NULL
;
6018 gfc_expr
*e2
= NULL
;
6020 gcc_assert (e
->value
.op
.op
== INTRINSIC_CONCAT
);
6022 if (op1
->ts
.u
.cl
&& op1
->ts
.u
.cl
->length
)
6023 e1
= gfc_copy_expr (op1
->ts
.u
.cl
->length
);
6024 else if (op1
->expr_type
== EXPR_CONSTANT
)
6025 e1
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
6026 op1
->value
.character
.length
);
6028 if (op2
->ts
.u
.cl
&& op2
->ts
.u
.cl
->length
)
6029 e2
= gfc_copy_expr (op2
->ts
.u
.cl
->length
);
6030 else if (op2
->expr_type
== EXPR_CONSTANT
)
6031 e2
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
6032 op2
->value
.character
.length
);
6034 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
6044 e
->ts
.u
.cl
->length
= gfc_add (e1
, e2
);
6045 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
6046 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
6047 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 0);
6048 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
6054 /* Ensure that an character expression has a charlen and, if possible, a
6055 length expression. */
6058 fixup_charlen (gfc_expr
*e
)
6060 /* The cases fall through so that changes in expression type and the need
6061 for multiple fixes are picked up. In all circumstances, a charlen should
6062 be available for the middle end to hang a backend_decl on. */
6063 switch (e
->expr_type
)
6066 gfc_resolve_character_operator (e
);
6070 if (e
->expr_type
== EXPR_ARRAY
)
6071 gfc_resolve_character_array_constructor (e
);
6074 case EXPR_SUBSTRING
:
6075 if (!e
->ts
.u
.cl
&& e
->ref
)
6076 gfc_resolve_substring_charlen (e
);
6081 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
6088 /* Update an actual argument to include the passed-object for type-bound
6089 procedures at the right position. */
6091 static gfc_actual_arglist
*
6092 update_arglist_pass (gfc_actual_arglist
* lst
, gfc_expr
* po
, unsigned argpos
,
6095 gcc_assert (argpos
> 0);
6099 gfc_actual_arglist
* result
;
6101 result
= gfc_get_actual_arglist ();
6105 result
->name
= name
;
6111 lst
->next
= update_arglist_pass (lst
->next
, po
, argpos
- 1, name
);
6113 lst
= update_arglist_pass (NULL
, po
, argpos
- 1, name
);
6118 /* Extract the passed-object from an EXPR_COMPCALL (a copy of it). */
6121 extract_compcall_passed_object (gfc_expr
* e
)
6125 if (e
->expr_type
== EXPR_UNKNOWN
)
6127 gfc_error ("Error in typebound call at %L",
6132 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6134 if (e
->value
.compcall
.base_object
)
6135 po
= gfc_copy_expr (e
->value
.compcall
.base_object
);
6138 po
= gfc_get_expr ();
6139 po
->expr_type
= EXPR_VARIABLE
;
6140 po
->symtree
= e
->symtree
;
6141 po
->ref
= gfc_copy_ref (e
->ref
);
6142 po
->where
= e
->where
;
6145 if (!gfc_resolve_expr (po
))
6152 /* Update the arglist of an EXPR_COMPCALL expression to include the
6156 update_compcall_arglist (gfc_expr
* e
)
6159 gfc_typebound_proc
* tbp
;
6161 tbp
= e
->value
.compcall
.tbp
;
6166 po
= extract_compcall_passed_object (e
);
6170 if (tbp
->nopass
|| e
->value
.compcall
.ignore_pass
)
6176 if (tbp
->pass_arg_num
<= 0)
6179 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6187 /* Extract the passed object from a PPC call (a copy of it). */
6190 extract_ppc_passed_object (gfc_expr
*e
)
6195 po
= gfc_get_expr ();
6196 po
->expr_type
= EXPR_VARIABLE
;
6197 po
->symtree
= e
->symtree
;
6198 po
->ref
= gfc_copy_ref (e
->ref
);
6199 po
->where
= e
->where
;
6201 /* Remove PPC reference. */
6203 while ((*ref
)->next
)
6204 ref
= &(*ref
)->next
;
6205 gfc_free_ref_list (*ref
);
6208 if (!gfc_resolve_expr (po
))
6215 /* Update the actual arglist of a procedure pointer component to include the
6219 update_ppc_arglist (gfc_expr
* e
)
6223 gfc_typebound_proc
* tb
;
6225 ppc
= gfc_get_proc_ptr_comp (e
);
6233 else if (tb
->nopass
)
6236 po
= extract_ppc_passed_object (e
);
6243 gfc_error ("Passed-object at %L must be scalar", &e
->where
);
6248 if (po
->ts
.type
== BT_DERIVED
&& po
->ts
.u
.derived
->attr
.abstract
)
6250 gfc_error ("Base object for procedure-pointer component call at %L is of"
6251 " ABSTRACT type %qs", &e
->where
, po
->ts
.u
.derived
->name
);
6255 gcc_assert (tb
->pass_arg_num
> 0);
6256 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6264 /* Check that the object a TBP is called on is valid, i.e. it must not be
6265 of ABSTRACT type (as in subobject%abstract_parent%tbp()). */
6268 check_typebound_baseobject (gfc_expr
* e
)
6271 bool return_value
= false;
6273 base
= extract_compcall_passed_object (e
);
6277 if (base
->ts
.type
!= BT_DERIVED
&& base
->ts
.type
!= BT_CLASS
)
6279 gfc_error ("Error in typebound call at %L", &e
->where
);
6283 if (base
->ts
.type
== BT_CLASS
&& !gfc_expr_attr (base
).class_ok
)
6287 if (base
->ts
.type
== BT_DERIVED
&& base
->ts
.u
.derived
->attr
.abstract
)
6289 gfc_error ("Base object for type-bound procedure call at %L is of"
6290 " ABSTRACT type %qs", &e
->where
, base
->ts
.u
.derived
->name
);
6294 /* F08:C1230. If the procedure called is NOPASS,
6295 the base object must be scalar. */
6296 if (e
->value
.compcall
.tbp
->nopass
&& base
->rank
!= 0)
6298 gfc_error ("Base object for NOPASS type-bound procedure call at %L must"
6299 " be scalar", &e
->where
);
6303 return_value
= true;
6306 gfc_free_expr (base
);
6307 return return_value
;
6311 /* Resolve a call to a type-bound procedure, either function or subroutine,
6312 statically from the data in an EXPR_COMPCALL expression. The adapted
6313 arglist and the target-procedure symtree are returned. */
6316 resolve_typebound_static (gfc_expr
* e
, gfc_symtree
** target
,
6317 gfc_actual_arglist
** actual
)
6319 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6320 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6322 /* Update the actual arglist for PASS. */
6323 if (!update_compcall_arglist (e
))
6326 *actual
= e
->value
.compcall
.actual
;
6327 *target
= e
->value
.compcall
.tbp
->u
.specific
;
6329 gfc_free_ref_list (e
->ref
);
6331 e
->value
.compcall
.actual
= NULL
;
6333 /* If we find a deferred typebound procedure, check for derived types
6334 that an overriding typebound procedure has not been missed. */
6335 if (e
->value
.compcall
.name
6336 && !e
->value
.compcall
.tbp
->non_overridable
6337 && e
->value
.compcall
.base_object
6338 && e
->value
.compcall
.base_object
->ts
.type
== BT_DERIVED
)
6341 gfc_symbol
*derived
;
6343 /* Use the derived type of the base_object. */
6344 derived
= e
->value
.compcall
.base_object
->ts
.u
.derived
;
6347 /* If necessary, go through the inheritance chain. */
6348 while (!st
&& derived
)
6350 /* Look for the typebound procedure 'name'. */
6351 if (derived
->f2k_derived
&& derived
->f2k_derived
->tb_sym_root
)
6352 st
= gfc_find_symtree (derived
->f2k_derived
->tb_sym_root
,
6353 e
->value
.compcall
.name
);
6355 derived
= gfc_get_derived_super_type (derived
);
6358 /* Now find the specific name in the derived type namespace. */
6359 if (st
&& st
->n
.tb
&& st
->n
.tb
->u
.specific
)
6360 gfc_find_sym_tree (st
->n
.tb
->u
.specific
->name
,
6361 derived
->ns
, 1, &st
);
6369 /* Get the ultimate declared type from an expression. In addition,
6370 return the last class/derived type reference and the copy of the
6371 reference list. If check_types is set true, derived types are
6372 identified as well as class references. */
6374 get_declared_from_expr (gfc_ref
**class_ref
, gfc_ref
**new_ref
,
6375 gfc_expr
*e
, bool check_types
)
6377 gfc_symbol
*declared
;
6384 *new_ref
= gfc_copy_ref (e
->ref
);
6386 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
6388 if (ref
->type
!= REF_COMPONENT
)
6391 if ((ref
->u
.c
.component
->ts
.type
== BT_CLASS
6392 || (check_types
&& gfc_bt_struct (ref
->u
.c
.component
->ts
.type
)))
6393 && ref
->u
.c
.component
->attr
.flavor
!= FL_PROCEDURE
)
6395 declared
= ref
->u
.c
.component
->ts
.u
.derived
;
6401 if (declared
== NULL
)
6402 declared
= e
->symtree
->n
.sym
->ts
.u
.derived
;
6408 /* Given an EXPR_COMPCALL calling a GENERIC typebound procedure, figure out
6409 which of the specific bindings (if any) matches the arglist and transform
6410 the expression into a call of that binding. */
6413 resolve_typebound_generic_call (gfc_expr
* e
, const char **name
)
6415 gfc_typebound_proc
* genproc
;
6416 const char* genname
;
6418 gfc_symbol
*derived
;
6420 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6421 genname
= e
->value
.compcall
.name
;
6422 genproc
= e
->value
.compcall
.tbp
;
6424 if (!genproc
->is_generic
)
6427 /* Try the bindings on this type and in the inheritance hierarchy. */
6428 for (; genproc
; genproc
= genproc
->overridden
)
6432 gcc_assert (genproc
->is_generic
);
6433 for (g
= genproc
->u
.generic
; g
; g
= g
->next
)
6436 gfc_actual_arglist
* args
;
6439 gcc_assert (g
->specific
);
6441 if (g
->specific
->error
)
6444 target
= g
->specific
->u
.specific
->n
.sym
;
6446 /* Get the right arglist by handling PASS/NOPASS. */
6447 args
= gfc_copy_actual_arglist (e
->value
.compcall
.actual
);
6448 if (!g
->specific
->nopass
)
6451 po
= extract_compcall_passed_object (e
);
6454 gfc_free_actual_arglist (args
);
6458 gcc_assert (g
->specific
->pass_arg_num
> 0);
6459 gcc_assert (!g
->specific
->error
);
6460 args
= update_arglist_pass (args
, po
, g
->specific
->pass_arg_num
,
6461 g
->specific
->pass_arg
);
6463 resolve_actual_arglist (args
, target
->attr
.proc
,
6464 is_external_proc (target
)
6465 && gfc_sym_get_dummy_args (target
) == NULL
);
6467 /* Check if this arglist matches the formal. */
6468 matches
= gfc_arglist_matches_symbol (&args
, target
);
6470 /* Clean up and break out of the loop if we've found it. */
6471 gfc_free_actual_arglist (args
);
6474 e
->value
.compcall
.tbp
= g
->specific
;
6475 genname
= g
->specific_st
->name
;
6476 /* Pass along the name for CLASS methods, where the vtab
6477 procedure pointer component has to be referenced. */
6485 /* Nothing matching found! */
6486 gfc_error ("Found no matching specific binding for the call to the GENERIC"
6487 " %qs at %L", genname
, &e
->where
);
6491 /* Make sure that we have the right specific instance for the name. */
6492 derived
= get_declared_from_expr (NULL
, NULL
, e
, true);
6494 st
= gfc_find_typebound_proc (derived
, NULL
, genname
, true, &e
->where
);
6496 e
->value
.compcall
.tbp
= st
->n
.tb
;
6502 /* Resolve a call to a type-bound subroutine. */
6505 resolve_typebound_call (gfc_code
* c
, const char **name
, bool *overridable
)
6507 gfc_actual_arglist
* newactual
;
6508 gfc_symtree
* target
;
6510 /* Check that's really a SUBROUTINE. */
6511 if (!c
->expr1
->value
.compcall
.tbp
->subroutine
)
6513 if (!c
->expr1
->value
.compcall
.tbp
->is_generic
6514 && c
->expr1
->value
.compcall
.tbp
->u
.specific
6515 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
6516 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
->attr
.subroutine
)
6517 c
->expr1
->value
.compcall
.tbp
->subroutine
= 1;
6520 gfc_error ("%qs at %L should be a SUBROUTINE",
6521 c
->expr1
->value
.compcall
.name
, &c
->loc
);
6526 if (!check_typebound_baseobject (c
->expr1
))
6529 /* Pass along the name for CLASS methods, where the vtab
6530 procedure pointer component has to be referenced. */
6532 *name
= c
->expr1
->value
.compcall
.name
;
6534 if (!resolve_typebound_generic_call (c
->expr1
, name
))
6537 /* Pass along the NON_OVERRIDABLE attribute of the specific TBP. */
6539 *overridable
= !c
->expr1
->value
.compcall
.tbp
->non_overridable
;
6541 /* Transform into an ordinary EXEC_CALL for now. */
6543 if (!resolve_typebound_static (c
->expr1
, &target
, &newactual
))
6546 c
->ext
.actual
= newactual
;
6547 c
->symtree
= target
;
6548 c
->op
= (c
->expr1
->value
.compcall
.assign
? EXEC_ASSIGN_CALL
: EXEC_CALL
);
6550 gcc_assert (!c
->expr1
->ref
&& !c
->expr1
->value
.compcall
.actual
);
6552 gfc_free_expr (c
->expr1
);
6553 c
->expr1
= gfc_get_expr ();
6554 c
->expr1
->expr_type
= EXPR_FUNCTION
;
6555 c
->expr1
->symtree
= target
;
6556 c
->expr1
->where
= c
->loc
;
6558 return resolve_call (c
);
6562 /* Resolve a component-call expression. */
6564 resolve_compcall (gfc_expr
* e
, const char **name
)
6566 gfc_actual_arglist
* newactual
;
6567 gfc_symtree
* target
;
6569 /* Check that's really a FUNCTION. */
6570 if (!e
->value
.compcall
.tbp
->function
)
6572 gfc_error ("%qs at %L should be a FUNCTION",
6573 e
->value
.compcall
.name
, &e
->where
);
6578 /* These must not be assign-calls! */
6579 gcc_assert (!e
->value
.compcall
.assign
);
6581 if (!check_typebound_baseobject (e
))
6584 /* Pass along the name for CLASS methods, where the vtab
6585 procedure pointer component has to be referenced. */
6587 *name
= e
->value
.compcall
.name
;
6589 if (!resolve_typebound_generic_call (e
, name
))
6591 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6593 /* Take the rank from the function's symbol. */
6594 if (e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
)
6595 e
->rank
= e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
->rank
;
6597 /* For now, we simply transform it into an EXPR_FUNCTION call with the same
6598 arglist to the TBP's binding target. */
6600 if (!resolve_typebound_static (e
, &target
, &newactual
))
6603 e
->value
.function
.actual
= newactual
;
6604 e
->value
.function
.name
= NULL
;
6605 e
->value
.function
.esym
= target
->n
.sym
;
6606 e
->value
.function
.isym
= NULL
;
6607 e
->symtree
= target
;
6608 e
->ts
= target
->n
.sym
->ts
;
6609 e
->expr_type
= EXPR_FUNCTION
;
6611 /* Resolution is not necessary if this is a class subroutine; this
6612 function only has to identify the specific proc. Resolution of
6613 the call will be done next in resolve_typebound_call. */
6614 return gfc_resolve_expr (e
);
6618 static bool resolve_fl_derived (gfc_symbol
*sym
);
6621 /* Resolve a typebound function, or 'method'. First separate all
6622 the non-CLASS references by calling resolve_compcall directly. */
6625 resolve_typebound_function (gfc_expr
* e
)
6627 gfc_symbol
*declared
;
6639 /* Deal with typebound operators for CLASS objects. */
6640 expr
= e
->value
.compcall
.base_object
;
6641 overridable
= !e
->value
.compcall
.tbp
->non_overridable
;
6642 if (expr
&& expr
->ts
.type
== BT_CLASS
&& e
->value
.compcall
.name
)
6644 /* Since the typebound operators are generic, we have to ensure
6645 that any delays in resolution are corrected and that the vtab
6648 declared
= ts
.u
.derived
;
6649 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6650 if (c
->ts
.u
.derived
== NULL
)
6651 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6653 if (!resolve_compcall (e
, &name
))
6656 /* Use the generic name if it is there. */
6657 name
= name
? name
: e
->value
.function
.esym
->name
;
6658 e
->symtree
= expr
->symtree
;
6659 e
->ref
= gfc_copy_ref (expr
->ref
);
6660 get_declared_from_expr (&class_ref
, NULL
, e
, false);
6662 /* Trim away the extraneous references that emerge from nested
6663 use of interface.c (extend_expr). */
6664 if (class_ref
&& class_ref
->next
)
6666 gfc_free_ref_list (class_ref
->next
);
6667 class_ref
->next
= NULL
;
6669 else if (e
->ref
&& !class_ref
&& expr
->ts
.type
!= BT_CLASS
)
6671 gfc_free_ref_list (e
->ref
);
6675 gfc_add_vptr_component (e
);
6676 gfc_add_component_ref (e
, name
);
6677 e
->value
.function
.esym
= NULL
;
6678 if (expr
->expr_type
!= EXPR_VARIABLE
)
6679 e
->base_expr
= expr
;
6684 return resolve_compcall (e
, NULL
);
6686 if (!gfc_resolve_ref (e
))
6689 /* Get the CLASS declared type. */
6690 declared
= get_declared_from_expr (&class_ref
, &new_ref
, e
, true);
6692 if (!resolve_fl_derived (declared
))
6695 /* Weed out cases of the ultimate component being a derived type. */
6696 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6697 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6699 gfc_free_ref_list (new_ref
);
6700 return resolve_compcall (e
, NULL
);
6703 c
= gfc_find_component (declared
, "_data", true, true, NULL
);
6705 /* Treat the call as if it is a typebound procedure, in order to roll
6706 out the correct name for the specific function. */
6707 if (!resolve_compcall (e
, &name
))
6709 gfc_free_ref_list (new_ref
);
6716 /* Convert the expression to a procedure pointer component call. */
6717 e
->value
.function
.esym
= NULL
;
6723 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6724 gfc_add_vptr_component (e
);
6725 gfc_add_component_ref (e
, name
);
6727 /* Recover the typespec for the expression. This is really only
6728 necessary for generic procedures, where the additional call
6729 to gfc_add_component_ref seems to throw the collection of the
6730 correct typespec. */
6734 gfc_free_ref_list (new_ref
);
6739 /* Resolve a typebound subroutine, or 'method'. First separate all
6740 the non-CLASS references by calling resolve_typebound_call
6744 resolve_typebound_subroutine (gfc_code
*code
)
6746 gfc_symbol
*declared
;
6756 st
= code
->expr1
->symtree
;
6758 /* Deal with typebound operators for CLASS objects. */
6759 expr
= code
->expr1
->value
.compcall
.base_object
;
6760 overridable
= !code
->expr1
->value
.compcall
.tbp
->non_overridable
;
6761 if (expr
&& expr
->ts
.type
== BT_CLASS
&& code
->expr1
->value
.compcall
.name
)
6763 /* If the base_object is not a variable, the corresponding actual
6764 argument expression must be stored in e->base_expression so
6765 that the corresponding tree temporary can be used as the base
6766 object in gfc_conv_procedure_call. */
6767 if (expr
->expr_type
!= EXPR_VARIABLE
)
6769 gfc_actual_arglist
*args
;
6771 args
= code
->expr1
->value
.function
.actual
;
6772 for (; args
; args
= args
->next
)
6773 if (expr
== args
->expr
)
6777 /* Since the typebound operators are generic, we have to ensure
6778 that any delays in resolution are corrected and that the vtab
6780 declared
= expr
->ts
.u
.derived
;
6781 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6782 if (c
->ts
.u
.derived
== NULL
)
6783 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6785 if (!resolve_typebound_call (code
, &name
, NULL
))
6788 /* Use the generic name if it is there. */
6789 name
= name
? name
: code
->expr1
->value
.function
.esym
->name
;
6790 code
->expr1
->symtree
= expr
->symtree
;
6791 code
->expr1
->ref
= gfc_copy_ref (expr
->ref
);
6793 /* Trim away the extraneous references that emerge from nested
6794 use of interface.c (extend_expr). */
6795 get_declared_from_expr (&class_ref
, NULL
, code
->expr1
, false);
6796 if (class_ref
&& class_ref
->next
)
6798 gfc_free_ref_list (class_ref
->next
);
6799 class_ref
->next
= NULL
;
6801 else if (code
->expr1
->ref
&& !class_ref
)
6803 gfc_free_ref_list (code
->expr1
->ref
);
6804 code
->expr1
->ref
= NULL
;
6807 /* Now use the procedure in the vtable. */
6808 gfc_add_vptr_component (code
->expr1
);
6809 gfc_add_component_ref (code
->expr1
, name
);
6810 code
->expr1
->value
.function
.esym
= NULL
;
6811 if (expr
->expr_type
!= EXPR_VARIABLE
)
6812 code
->expr1
->base_expr
= expr
;
6817 return resolve_typebound_call (code
, NULL
, NULL
);
6819 if (!gfc_resolve_ref (code
->expr1
))
6822 /* Get the CLASS declared type. */
6823 get_declared_from_expr (&class_ref
, &new_ref
, code
->expr1
, true);
6825 /* Weed out cases of the ultimate component being a derived type. */
6826 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6827 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6829 gfc_free_ref_list (new_ref
);
6830 return resolve_typebound_call (code
, NULL
, NULL
);
6833 if (!resolve_typebound_call (code
, &name
, &overridable
))
6835 gfc_free_ref_list (new_ref
);
6838 ts
= code
->expr1
->ts
;
6842 /* Convert the expression to a procedure pointer component call. */
6843 code
->expr1
->value
.function
.esym
= NULL
;
6844 code
->expr1
->symtree
= st
;
6847 code
->expr1
->ref
= new_ref
;
6849 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6850 gfc_add_vptr_component (code
->expr1
);
6851 gfc_add_component_ref (code
->expr1
, name
);
6853 /* Recover the typespec for the expression. This is really only
6854 necessary for generic procedures, where the additional call
6855 to gfc_add_component_ref seems to throw the collection of the
6856 correct typespec. */
6857 code
->expr1
->ts
= ts
;
6860 gfc_free_ref_list (new_ref
);
6866 /* Resolve a CALL to a Procedure Pointer Component (Subroutine). */
6869 resolve_ppc_call (gfc_code
* c
)
6871 gfc_component
*comp
;
6873 comp
= gfc_get_proc_ptr_comp (c
->expr1
);
6874 gcc_assert (comp
!= NULL
);
6876 c
->resolved_sym
= c
->expr1
->symtree
->n
.sym
;
6877 c
->expr1
->expr_type
= EXPR_VARIABLE
;
6879 if (!comp
->attr
.subroutine
)
6880 gfc_add_subroutine (&comp
->attr
, comp
->name
, &c
->expr1
->where
);
6882 if (!gfc_resolve_ref (c
->expr1
))
6885 if (!update_ppc_arglist (c
->expr1
))
6888 c
->ext
.actual
= c
->expr1
->value
.compcall
.actual
;
6890 if (!resolve_actual_arglist (c
->ext
.actual
, comp
->attr
.proc
,
6891 !(comp
->ts
.interface
6892 && comp
->ts
.interface
->formal
)))
6895 if (!pure_subroutine (comp
->ts
.interface
, comp
->name
, &c
->expr1
->where
))
6898 gfc_ppc_use (comp
, &c
->expr1
->value
.compcall
.actual
, &c
->expr1
->where
);
6904 /* Resolve a Function Call to a Procedure Pointer Component (Function). */
6907 resolve_expr_ppc (gfc_expr
* e
)
6909 gfc_component
*comp
;
6911 comp
= gfc_get_proc_ptr_comp (e
);
6912 gcc_assert (comp
!= NULL
);
6914 /* Convert to EXPR_FUNCTION. */
6915 e
->expr_type
= EXPR_FUNCTION
;
6916 e
->value
.function
.isym
= NULL
;
6917 e
->value
.function
.actual
= e
->value
.compcall
.actual
;
6919 if (comp
->as
!= NULL
)
6920 e
->rank
= comp
->as
->rank
;
6922 if (!comp
->attr
.function
)
6923 gfc_add_function (&comp
->attr
, comp
->name
, &e
->where
);
6925 if (!gfc_resolve_ref (e
))
6928 if (!resolve_actual_arglist (e
->value
.function
.actual
, comp
->attr
.proc
,
6929 !(comp
->ts
.interface
6930 && comp
->ts
.interface
->formal
)))
6933 if (!update_ppc_arglist (e
))
6936 if (!check_pure_function(e
))
6939 gfc_ppc_use (comp
, &e
->value
.compcall
.actual
, &e
->where
);
6946 gfc_is_expandable_expr (gfc_expr
*e
)
6948 gfc_constructor
*con
;
6950 if (e
->expr_type
== EXPR_ARRAY
)
6952 /* Traverse the constructor looking for variables that are flavor
6953 parameter. Parameters must be expanded since they are fully used at
6955 con
= gfc_constructor_first (e
->value
.constructor
);
6956 for (; con
; con
= gfc_constructor_next (con
))
6958 if (con
->expr
->expr_type
== EXPR_VARIABLE
6959 && con
->expr
->symtree
6960 && (con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
6961 || con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_VARIABLE
))
6963 if (con
->expr
->expr_type
== EXPR_ARRAY
6964 && gfc_is_expandable_expr (con
->expr
))
6973 /* Sometimes variables in specification expressions of the result
6974 of module procedures in submodules wind up not being the 'real'
6975 dummy. Find this, if possible, in the namespace of the first
6979 fixup_unique_dummy (gfc_expr
*e
)
6981 gfc_symtree
*st
= NULL
;
6982 gfc_symbol
*s
= NULL
;
6984 if (e
->symtree
->n
.sym
->ns
->proc_name
6985 && e
->symtree
->n
.sym
->ns
->proc_name
->formal
)
6986 s
= e
->symtree
->n
.sym
->ns
->proc_name
->formal
->sym
;
6989 st
= gfc_find_symtree (s
->ns
->sym_root
, e
->symtree
->n
.sym
->name
);
6992 && st
->n
.sym
!= NULL
6993 && st
->n
.sym
->attr
.dummy
)
6997 /* Resolve an expression. That is, make sure that types of operands agree
6998 with their operators, intrinsic operators are converted to function calls
6999 for overloaded types and unresolved function references are resolved. */
7002 gfc_resolve_expr (gfc_expr
*e
)
7005 bool inquiry_save
, actual_arg_save
, first_actual_arg_save
;
7007 if (e
== NULL
|| e
->do_not_resolve_again
)
7010 /* inquiry_argument only applies to variables. */
7011 inquiry_save
= inquiry_argument
;
7012 actual_arg_save
= actual_arg
;
7013 first_actual_arg_save
= first_actual_arg
;
7015 if (e
->expr_type
!= EXPR_VARIABLE
)
7017 inquiry_argument
= false;
7019 first_actual_arg
= false;
7021 else if (e
->symtree
!= NULL
7022 && *e
->symtree
->name
== '@'
7023 && e
->symtree
->n
.sym
->attr
.dummy
)
7025 /* Deal with submodule specification expressions that are not
7026 found to be referenced in module.c(read_cleanup). */
7027 fixup_unique_dummy (e
);
7030 switch (e
->expr_type
)
7033 t
= resolve_operator (e
);
7039 if (check_host_association (e
))
7040 t
= resolve_function (e
);
7042 t
= resolve_variable (e
);
7044 if (e
->ts
.type
== BT_CHARACTER
&& e
->ts
.u
.cl
== NULL
&& e
->ref
7045 && e
->ref
->type
!= REF_SUBSTRING
)
7046 gfc_resolve_substring_charlen (e
);
7051 t
= resolve_typebound_function (e
);
7054 case EXPR_SUBSTRING
:
7055 t
= gfc_resolve_ref (e
);
7064 t
= resolve_expr_ppc (e
);
7069 if (!gfc_resolve_ref (e
))
7072 t
= gfc_resolve_array_constructor (e
);
7073 /* Also try to expand a constructor. */
7076 gfc_expression_rank (e
);
7077 if (gfc_is_constant_expr (e
) || gfc_is_expandable_expr (e
))
7078 gfc_expand_constructor (e
, false);
7081 /* This provides the opportunity for the length of constructors with
7082 character valued function elements to propagate the string length
7083 to the expression. */
7084 if (t
&& e
->ts
.type
== BT_CHARACTER
)
7086 /* For efficiency, we call gfc_expand_constructor for BT_CHARACTER
7087 here rather then add a duplicate test for it above. */
7088 gfc_expand_constructor (e
, false);
7089 t
= gfc_resolve_character_array_constructor (e
);
7094 case EXPR_STRUCTURE
:
7095 t
= gfc_resolve_ref (e
);
7099 t
= resolve_structure_cons (e
, 0);
7103 t
= gfc_simplify_expr (e
, 0);
7107 gfc_internal_error ("gfc_resolve_expr(): Bad expression type");
7110 if (e
->ts
.type
== BT_CHARACTER
&& t
&& !e
->ts
.u
.cl
)
7113 inquiry_argument
= inquiry_save
;
7114 actual_arg
= actual_arg_save
;
7115 first_actual_arg
= first_actual_arg_save
;
7117 /* For some reason, resolving these expressions a second time mangles
7118 the typespec of the expression itself. */
7119 if (t
&& e
->expr_type
== EXPR_VARIABLE
7120 && e
->symtree
->n
.sym
->attr
.select_rank_temporary
7121 && UNLIMITED_POLY (e
->symtree
->n
.sym
))
7122 e
->do_not_resolve_again
= 1;
7128 /* Resolve an expression from an iterator. They must be scalar and have
7129 INTEGER or (optionally) REAL type. */
7132 gfc_resolve_iterator_expr (gfc_expr
*expr
, bool real_ok
,
7133 const char *name_msgid
)
7135 if (!gfc_resolve_expr (expr
))
7138 if (expr
->rank
!= 0)
7140 gfc_error ("%s at %L must be a scalar", _(name_msgid
), &expr
->where
);
7144 if (expr
->ts
.type
!= BT_INTEGER
)
7146 if (expr
->ts
.type
== BT_REAL
)
7149 return gfc_notify_std (GFC_STD_F95_DEL
,
7150 "%s at %L must be integer",
7151 _(name_msgid
), &expr
->where
);
7154 gfc_error ("%s at %L must be INTEGER", _(name_msgid
),
7161 gfc_error ("%s at %L must be INTEGER", _(name_msgid
), &expr
->where
);
7169 /* Resolve the expressions in an iterator structure. If REAL_OK is
7170 false allow only INTEGER type iterators, otherwise allow REAL types.
7171 Set own_scope to true for ac-implied-do and data-implied-do as those
7172 have a separate scope such that, e.g., a INTENT(IN) doesn't apply. */
7175 gfc_resolve_iterator (gfc_iterator
*iter
, bool real_ok
, bool own_scope
)
7177 if (!gfc_resolve_iterator_expr (iter
->var
, real_ok
, "Loop variable"))
7180 if (!gfc_check_vardef_context (iter
->var
, false, false, own_scope
,
7181 _("iterator variable")))
7184 if (!gfc_resolve_iterator_expr (iter
->start
, real_ok
,
7185 "Start expression in DO loop"))
7188 if (!gfc_resolve_iterator_expr (iter
->end
, real_ok
,
7189 "End expression in DO loop"))
7192 if (!gfc_resolve_iterator_expr (iter
->step
, real_ok
,
7193 "Step expression in DO loop"))
7196 /* Convert start, end, and step to the same type as var. */
7197 if (iter
->start
->ts
.kind
!= iter
->var
->ts
.kind
7198 || iter
->start
->ts
.type
!= iter
->var
->ts
.type
)
7199 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7201 if (iter
->end
->ts
.kind
!= iter
->var
->ts
.kind
7202 || iter
->end
->ts
.type
!= iter
->var
->ts
.type
)
7203 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7205 if (iter
->step
->ts
.kind
!= iter
->var
->ts
.kind
7206 || iter
->step
->ts
.type
!= iter
->var
->ts
.type
)
7207 gfc_convert_type (iter
->step
, &iter
->var
->ts
, 1);
7209 if (iter
->step
->expr_type
== EXPR_CONSTANT
)
7211 if ((iter
->step
->ts
.type
== BT_INTEGER
7212 && mpz_cmp_ui (iter
->step
->value
.integer
, 0) == 0)
7213 || (iter
->step
->ts
.type
== BT_REAL
7214 && mpfr_sgn (iter
->step
->value
.real
) == 0))
7216 gfc_error ("Step expression in DO loop at %L cannot be zero",
7217 &iter
->step
->where
);
7222 if (iter
->start
->expr_type
== EXPR_CONSTANT
7223 && iter
->end
->expr_type
== EXPR_CONSTANT
7224 && iter
->step
->expr_type
== EXPR_CONSTANT
)
7227 if (iter
->start
->ts
.type
== BT_INTEGER
)
7229 sgn
= mpz_cmp_ui (iter
->step
->value
.integer
, 0);
7230 cmp
= mpz_cmp (iter
->end
->value
.integer
, iter
->start
->value
.integer
);
7234 sgn
= mpfr_sgn (iter
->step
->value
.real
);
7235 cmp
= mpfr_cmp (iter
->end
->value
.real
, iter
->start
->value
.real
);
7237 if (warn_zerotrip
&& ((sgn
> 0 && cmp
< 0) || (sgn
< 0 && cmp
> 0)))
7238 gfc_warning (OPT_Wzerotrip
,
7239 "DO loop at %L will be executed zero times",
7240 &iter
->step
->where
);
7243 if (iter
->end
->expr_type
== EXPR_CONSTANT
7244 && iter
->end
->ts
.type
== BT_INTEGER
7245 && iter
->step
->expr_type
== EXPR_CONSTANT
7246 && iter
->step
->ts
.type
== BT_INTEGER
7247 && (mpz_cmp_si (iter
->step
->value
.integer
, -1L) == 0
7248 || mpz_cmp_si (iter
->step
->value
.integer
, 1L) == 0))
7250 bool is_step_positive
= mpz_cmp_ui (iter
->step
->value
.integer
, 1) == 0;
7251 int k
= gfc_validate_kind (BT_INTEGER
, iter
->end
->ts
.kind
, false);
7253 if (is_step_positive
7254 && mpz_cmp (iter
->end
->value
.integer
, gfc_integer_kinds
[k
].huge
) == 0)
7255 gfc_warning (OPT_Wundefined_do_loop
,
7256 "DO loop at %L is undefined as it overflows",
7257 &iter
->step
->where
);
7258 else if (!is_step_positive
7259 && mpz_cmp (iter
->end
->value
.integer
,
7260 gfc_integer_kinds
[k
].min_int
) == 0)
7261 gfc_warning (OPT_Wundefined_do_loop
,
7262 "DO loop at %L is undefined as it underflows",
7263 &iter
->step
->where
);
7270 /* Traversal function for find_forall_index. f == 2 signals that
7271 that variable itself is not to be checked - only the references. */
7274 forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int *f
)
7276 if (expr
->expr_type
!= EXPR_VARIABLE
)
7279 /* A scalar assignment */
7280 if (!expr
->ref
|| *f
== 1)
7282 if (expr
->symtree
->n
.sym
== sym
)
7294 /* Check whether the FORALL index appears in the expression or not.
7295 Returns true if SYM is found in EXPR. */
7298 find_forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int f
)
7300 if (gfc_traverse_expr (expr
, sym
, forall_index
, f
))
7307 /* Resolve a list of FORALL iterators. The FORALL index-name is constrained
7308 to be a scalar INTEGER variable. The subscripts and stride are scalar
7309 INTEGERs, and if stride is a constant it must be nonzero.
7310 Furthermore "A subscript or stride in a forall-triplet-spec shall
7311 not contain a reference to any index-name in the
7312 forall-triplet-spec-list in which it appears." (7.5.4.1) */
7315 resolve_forall_iterators (gfc_forall_iterator
*it
)
7317 gfc_forall_iterator
*iter
, *iter2
;
7319 for (iter
= it
; iter
; iter
= iter
->next
)
7321 if (gfc_resolve_expr (iter
->var
)
7322 && (iter
->var
->ts
.type
!= BT_INTEGER
|| iter
->var
->rank
!= 0))
7323 gfc_error ("FORALL index-name at %L must be a scalar INTEGER",
7326 if (gfc_resolve_expr (iter
->start
)
7327 && (iter
->start
->ts
.type
!= BT_INTEGER
|| iter
->start
->rank
!= 0))
7328 gfc_error ("FORALL start expression at %L must be a scalar INTEGER",
7329 &iter
->start
->where
);
7330 if (iter
->var
->ts
.kind
!= iter
->start
->ts
.kind
)
7331 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7333 if (gfc_resolve_expr (iter
->end
)
7334 && (iter
->end
->ts
.type
!= BT_INTEGER
|| iter
->end
->rank
!= 0))
7335 gfc_error ("FORALL end expression at %L must be a scalar INTEGER",
7337 if (iter
->var
->ts
.kind
!= iter
->end
->ts
.kind
)
7338 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7340 if (gfc_resolve_expr (iter
->stride
))
7342 if (iter
->stride
->ts
.type
!= BT_INTEGER
|| iter
->stride
->rank
!= 0)
7343 gfc_error ("FORALL stride expression at %L must be a scalar %s",
7344 &iter
->stride
->where
, "INTEGER");
7346 if (iter
->stride
->expr_type
== EXPR_CONSTANT
7347 && mpz_cmp_ui (iter
->stride
->value
.integer
, 0) == 0)
7348 gfc_error ("FORALL stride expression at %L cannot be zero",
7349 &iter
->stride
->where
);
7351 if (iter
->var
->ts
.kind
!= iter
->stride
->ts
.kind
)
7352 gfc_convert_type (iter
->stride
, &iter
->var
->ts
, 1);
7355 for (iter
= it
; iter
; iter
= iter
->next
)
7356 for (iter2
= iter
; iter2
; iter2
= iter2
->next
)
7358 if (find_forall_index (iter2
->start
, iter
->var
->symtree
->n
.sym
, 0)
7359 || find_forall_index (iter2
->end
, iter
->var
->symtree
->n
.sym
, 0)
7360 || find_forall_index (iter2
->stride
, iter
->var
->symtree
->n
.sym
, 0))
7361 gfc_error ("FORALL index %qs may not appear in triplet "
7362 "specification at %L", iter
->var
->symtree
->name
,
7363 &iter2
->start
->where
);
7368 /* Given a pointer to a symbol that is a derived type, see if it's
7369 inaccessible, i.e. if it's defined in another module and the components are
7370 PRIVATE. The search is recursive if necessary. Returns zero if no
7371 inaccessible components are found, nonzero otherwise. */
7374 derived_inaccessible (gfc_symbol
*sym
)
7378 if (sym
->attr
.use_assoc
&& sym
->attr
.private_comp
)
7381 for (c
= sym
->components
; c
; c
= c
->next
)
7383 /* Prevent an infinite loop through this function. */
7384 if (c
->ts
.type
== BT_DERIVED
&& c
->attr
.pointer
7385 && sym
== c
->ts
.u
.derived
)
7388 if (c
->ts
.type
== BT_DERIVED
&& derived_inaccessible (c
->ts
.u
.derived
))
7396 /* Resolve the argument of a deallocate expression. The expression must be
7397 a pointer or a full array. */
7400 resolve_deallocate_expr (gfc_expr
*e
)
7402 symbol_attribute attr
;
7403 int allocatable
, pointer
;
7409 if (!gfc_resolve_expr (e
))
7412 if (e
->expr_type
!= EXPR_VARIABLE
)
7415 sym
= e
->symtree
->n
.sym
;
7416 unlimited
= UNLIMITED_POLY(sym
);
7418 if (sym
->ts
.type
== BT_CLASS
)
7420 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7421 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7425 allocatable
= sym
->attr
.allocatable
;
7426 pointer
= sym
->attr
.pointer
;
7428 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7433 if (ref
->u
.ar
.type
!= AR_FULL
7434 && !(ref
->u
.ar
.type
== AR_ELEMENT
&& ref
->u
.ar
.as
->rank
== 0
7435 && ref
->u
.ar
.codimen
&& gfc_ref_this_image (ref
)))
7440 c
= ref
->u
.c
.component
;
7441 if (c
->ts
.type
== BT_CLASS
)
7443 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7444 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7448 allocatable
= c
->attr
.allocatable
;
7449 pointer
= c
->attr
.pointer
;
7460 attr
= gfc_expr_attr (e
);
7462 if (allocatable
== 0 && attr
.pointer
== 0 && !unlimited
)
7465 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7471 if (gfc_is_coindexed (e
))
7473 gfc_error ("Coindexed allocatable object at %L", &e
->where
);
7478 && !gfc_check_vardef_context (e
, true, true, false,
7479 _("DEALLOCATE object")))
7481 if (!gfc_check_vardef_context (e
, false, true, false,
7482 _("DEALLOCATE object")))
7489 /* Returns true if the expression e contains a reference to the symbol sym. */
7491 sym_in_expr (gfc_expr
*e
, gfc_symbol
*sym
, int *f ATTRIBUTE_UNUSED
)
7493 if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
== sym
)
7500 gfc_find_sym_in_expr (gfc_symbol
*sym
, gfc_expr
*e
)
7502 return gfc_traverse_expr (e
, sym
, sym_in_expr
, 0);
7506 /* Given the expression node e for an allocatable/pointer of derived type to be
7507 allocated, get the expression node to be initialized afterwards (needed for
7508 derived types with default initializers, and derived types with allocatable
7509 components that need nullification.) */
7512 gfc_expr_to_initialize (gfc_expr
*e
)
7518 result
= gfc_copy_expr (e
);
7520 /* Change the last array reference from AR_ELEMENT to AR_FULL. */
7521 for (ref
= result
->ref
; ref
; ref
= ref
->next
)
7522 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
7524 if (ref
->u
.ar
.dimen
== 0
7525 && ref
->u
.ar
.as
&& ref
->u
.ar
.as
->corank
)
7528 ref
->u
.ar
.type
= AR_FULL
;
7530 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
7531 ref
->u
.ar
.start
[i
] = ref
->u
.ar
.end
[i
] = ref
->u
.ar
.stride
[i
] = NULL
;
7536 gfc_free_shape (&result
->shape
, result
->rank
);
7538 /* Recalculate rank, shape, etc. */
7539 gfc_resolve_expr (result
);
7544 /* If the last ref of an expression is an array ref, return a copy of the
7545 expression with that one removed. Otherwise, a copy of the original
7546 expression. This is used for allocate-expressions and pointer assignment
7547 LHS, where there may be an array specification that needs to be stripped
7548 off when using gfc_check_vardef_context. */
7551 remove_last_array_ref (gfc_expr
* e
)
7556 e2
= gfc_copy_expr (e
);
7557 for (r
= &e2
->ref
; *r
; r
= &(*r
)->next
)
7558 if ((*r
)->type
== REF_ARRAY
&& !(*r
)->next
)
7560 gfc_free_ref_list (*r
);
7569 /* Used in resolve_allocate_expr to check that a allocation-object and
7570 a source-expr are conformable. This does not catch all possible
7571 cases; in particular a runtime checking is needed. */
7574 conformable_arrays (gfc_expr
*e1
, gfc_expr
*e2
)
7577 for (tail
= e2
->ref
; tail
&& tail
->next
; tail
= tail
->next
);
7579 /* First compare rank. */
7580 if ((tail
&& (!tail
->u
.ar
.as
|| e1
->rank
!= tail
->u
.ar
.as
->rank
))
7581 || (!tail
&& e1
->rank
!= e2
->rank
))
7583 gfc_error ("Source-expr at %L must be scalar or have the "
7584 "same rank as the allocate-object at %L",
7585 &e1
->where
, &e2
->where
);
7596 for (i
= 0; i
< e1
->rank
; i
++)
7598 if (tail
->u
.ar
.start
[i
] == NULL
)
7601 if (tail
->u
.ar
.end
[i
])
7603 mpz_set (s
, tail
->u
.ar
.end
[i
]->value
.integer
);
7604 mpz_sub (s
, s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7605 mpz_add_ui (s
, s
, 1);
7609 mpz_set (s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7612 if (mpz_cmp (e1
->shape
[i
], s
) != 0)
7614 gfc_error ("Source-expr at %L and allocate-object at %L must "
7615 "have the same shape", &e1
->where
, &e2
->where
);
7628 /* Resolve the expression in an ALLOCATE statement, doing the additional
7629 checks to see whether the expression is OK or not. The expression must
7630 have a trailing array reference that gives the size of the array. */
7633 resolve_allocate_expr (gfc_expr
*e
, gfc_code
*code
, bool *array_alloc_wo_spec
)
7635 int i
, pointer
, allocatable
, dimension
, is_abstract
;
7639 symbol_attribute attr
;
7640 gfc_ref
*ref
, *ref2
;
7643 gfc_symbol
*sym
= NULL
;
7648 /* Mark the utmost array component as being in allocate to allow DIMEN_STAR
7649 checking of coarrays. */
7650 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7651 if (ref
->next
== NULL
)
7654 if (ref
&& ref
->type
== REF_ARRAY
)
7655 ref
->u
.ar
.in_allocate
= true;
7657 if (!gfc_resolve_expr (e
))
7660 /* Make sure the expression is allocatable or a pointer. If it is
7661 pointer, the next-to-last reference must be a pointer. */
7665 sym
= e
->symtree
->n
.sym
;
7667 /* Check whether ultimate component is abstract and CLASS. */
7670 /* Is the allocate-object unlimited polymorphic? */
7671 unlimited
= UNLIMITED_POLY(e
);
7673 if (e
->expr_type
!= EXPR_VARIABLE
)
7676 attr
= gfc_expr_attr (e
);
7677 pointer
= attr
.pointer
;
7678 dimension
= attr
.dimension
;
7679 codimension
= attr
.codimension
;
7683 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
))
7685 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7686 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7687 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
7688 codimension
= CLASS_DATA (sym
)->attr
.codimension
;
7689 is_abstract
= CLASS_DATA (sym
)->attr
.abstract
;
7693 allocatable
= sym
->attr
.allocatable
;
7694 pointer
= sym
->attr
.pointer
;
7695 dimension
= sym
->attr
.dimension
;
7696 codimension
= sym
->attr
.codimension
;
7701 for (ref
= e
->ref
; ref
; ref2
= ref
, ref
= ref
->next
)
7706 if (ref
->u
.ar
.codimen
> 0)
7709 for (n
= ref
->u
.ar
.dimen
;
7710 n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
7711 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_THIS_IMAGE
)
7718 if (ref
->next
!= NULL
)
7726 gfc_error ("Coindexed allocatable object at %L",
7731 c
= ref
->u
.c
.component
;
7732 if (c
->ts
.type
== BT_CLASS
)
7734 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7735 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7736 dimension
= CLASS_DATA (c
)->attr
.dimension
;
7737 codimension
= CLASS_DATA (c
)->attr
.codimension
;
7738 is_abstract
= CLASS_DATA (c
)->attr
.abstract
;
7742 allocatable
= c
->attr
.allocatable
;
7743 pointer
= c
->attr
.pointer
;
7744 dimension
= c
->attr
.dimension
;
7745 codimension
= c
->attr
.codimension
;
7746 is_abstract
= c
->attr
.abstract
;
7759 /* Check for F08:C628. */
7760 if (allocatable
== 0 && pointer
== 0 && !unlimited
)
7762 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7767 /* Some checks for the SOURCE tag. */
7770 /* Check F03:C631. */
7771 if (!gfc_type_compatible (&e
->ts
, &code
->expr3
->ts
))
7773 gfc_error ("Type of entity at %L is type incompatible with "
7774 "source-expr at %L", &e
->where
, &code
->expr3
->where
);
7778 /* Check F03:C632 and restriction following Note 6.18. */
7779 if (code
->expr3
->rank
> 0 && !conformable_arrays (code
->expr3
, e
))
7782 /* Check F03:C633. */
7783 if (code
->expr3
->ts
.kind
!= e
->ts
.kind
&& !unlimited
)
7785 gfc_error ("The allocate-object at %L and the source-expr at %L "
7786 "shall have the same kind type parameter",
7787 &e
->where
, &code
->expr3
->where
);
7791 /* Check F2008, C642. */
7792 if (code
->expr3
->ts
.type
== BT_DERIVED
7793 && ((codimension
&& gfc_expr_attr (code
->expr3
).lock_comp
)
7794 || (code
->expr3
->ts
.u
.derived
->from_intmod
7795 == INTMOD_ISO_FORTRAN_ENV
7796 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7797 == ISOFORTRAN_LOCK_TYPE
)))
7799 gfc_error ("The source-expr at %L shall neither be of type "
7800 "LOCK_TYPE nor have a LOCK_TYPE component if "
7801 "allocate-object at %L is a coarray",
7802 &code
->expr3
->where
, &e
->where
);
7806 /* Check TS18508, C702/C703. */
7807 if (code
->expr3
->ts
.type
== BT_DERIVED
7808 && ((codimension
&& gfc_expr_attr (code
->expr3
).event_comp
)
7809 || (code
->expr3
->ts
.u
.derived
->from_intmod
7810 == INTMOD_ISO_FORTRAN_ENV
7811 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7812 == ISOFORTRAN_EVENT_TYPE
)))
7814 gfc_error ("The source-expr at %L shall neither be of type "
7815 "EVENT_TYPE nor have a EVENT_TYPE component if "
7816 "allocate-object at %L is a coarray",
7817 &code
->expr3
->where
, &e
->where
);
7822 /* Check F08:C629. */
7823 if (is_abstract
&& code
->ext
.alloc
.ts
.type
== BT_UNKNOWN
7826 gcc_assert (e
->ts
.type
== BT_CLASS
);
7827 gfc_error ("Allocating %s of ABSTRACT base type at %L requires a "
7828 "type-spec or source-expr", sym
->name
, &e
->where
);
7832 /* Check F08:C632. */
7833 if (code
->ext
.alloc
.ts
.type
== BT_CHARACTER
&& !e
->ts
.deferred
7834 && !UNLIMITED_POLY (e
))
7838 if (!e
->ts
.u
.cl
->length
)
7841 cmp
= gfc_dep_compare_expr (e
->ts
.u
.cl
->length
,
7842 code
->ext
.alloc
.ts
.u
.cl
->length
);
7843 if (cmp
== 1 || cmp
== -1 || cmp
== -3)
7845 gfc_error ("Allocating %s at %L with type-spec requires the same "
7846 "character-length parameter as in the declaration",
7847 sym
->name
, &e
->where
);
7852 /* In the variable definition context checks, gfc_expr_attr is used
7853 on the expression. This is fooled by the array specification
7854 present in e, thus we have to eliminate that one temporarily. */
7855 e2
= remove_last_array_ref (e
);
7858 t
= gfc_check_vardef_context (e2
, true, true, false,
7859 _("ALLOCATE object"));
7861 t
= gfc_check_vardef_context (e2
, false, true, false,
7862 _("ALLOCATE object"));
7867 if (e
->ts
.type
== BT_CLASS
&& CLASS_DATA (e
)->attr
.dimension
7868 && !code
->expr3
&& code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7870 /* For class arrays, the initialization with SOURCE is done
7871 using _copy and trans_call. It is convenient to exploit that
7872 when the allocated type is different from the declared type but
7873 no SOURCE exists by setting expr3. */
7874 code
->expr3
= gfc_default_initializer (&code
->ext
.alloc
.ts
);
7876 else if (flag_coarray
!= GFC_FCOARRAY_LIB
&& e
->ts
.type
== BT_DERIVED
7877 && e
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
7878 && e
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
7880 /* We have to zero initialize the integer variable. */
7881 code
->expr3
= gfc_get_int_expr (gfc_default_integer_kind
, &e
->where
, 0);
7884 if (e
->ts
.type
== BT_CLASS
&& !unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7886 /* Make sure the vtab symbol is present when
7887 the module variables are generated. */
7888 gfc_typespec ts
= e
->ts
;
7890 ts
= code
->expr3
->ts
;
7891 else if (code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7892 ts
= code
->ext
.alloc
.ts
;
7894 /* Finding the vtab also publishes the type's symbol. Therefore this
7895 statement is necessary. */
7896 gfc_find_derived_vtab (ts
.u
.derived
);
7898 else if (unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7900 /* Again, make sure the vtab symbol is present when
7901 the module variables are generated. */
7902 gfc_typespec
*ts
= NULL
;
7904 ts
= &code
->expr3
->ts
;
7906 ts
= &code
->ext
.alloc
.ts
;
7910 /* Finding the vtab also publishes the type's symbol. Therefore this
7911 statement is necessary. */
7915 if (dimension
== 0 && codimension
== 0)
7918 /* Make sure the last reference node is an array specification. */
7920 if (!ref2
|| ref2
->type
!= REF_ARRAY
|| ref2
->u
.ar
.type
== AR_FULL
7921 || (dimension
&& ref2
->u
.ar
.dimen
== 0))
7926 if (!gfc_notify_std (GFC_STD_F2008
, "Array specification required "
7927 "in ALLOCATE statement at %L", &e
->where
))
7929 if (code
->expr3
->rank
!= 0)
7930 *array_alloc_wo_spec
= true;
7933 gfc_error ("Array specification or array-valued SOURCE= "
7934 "expression required in ALLOCATE statement at %L",
7941 gfc_error ("Array specification required in ALLOCATE statement "
7942 "at %L", &e
->where
);
7947 /* Make sure that the array section reference makes sense in the
7948 context of an ALLOCATE specification. */
7953 for (i
= ar
->dimen
; i
< ar
->dimen
+ ar
->codimen
; i
++)
7955 switch (ar
->dimen_type
[i
])
7957 case DIMEN_THIS_IMAGE
:
7958 gfc_error ("Coarray specification required in ALLOCATE statement "
7959 "at %L", &e
->where
);
7963 if (ar
->start
[i
] == 0 || ar
->end
[i
] == 0)
7965 /* If ar->stride[i] is NULL, we issued a previous error. */
7966 if (ar
->stride
[i
] == NULL
)
7967 gfc_error ("Bad array specification in ALLOCATE statement "
7968 "at %L", &e
->where
);
7971 else if (gfc_dep_compare_expr (ar
->start
[i
], ar
->end
[i
]) == 1)
7973 gfc_error ("Upper cobound is less than lower cobound at %L",
7974 &ar
->start
[i
]->where
);
7980 if (ar
->start
[i
]->expr_type
== EXPR_CONSTANT
)
7982 gcc_assert (ar
->start
[i
]->ts
.type
== BT_INTEGER
);
7983 if (mpz_cmp_si (ar
->start
[i
]->value
.integer
, 1) < 0)
7985 gfc_error ("Upper cobound is less than lower cobound "
7986 "of 1 at %L", &ar
->start
[i
]->where
);
7996 gfc_error ("Bad array specification in ALLOCATE statement at %L",
8002 for (i
= 0; i
< ar
->dimen
; i
++)
8004 if (ar
->type
== AR_ELEMENT
|| ar
->type
== AR_FULL
)
8007 switch (ar
->dimen_type
[i
])
8013 if (ar
->start
[i
] != NULL
8014 && ar
->end
[i
] != NULL
8015 && ar
->stride
[i
] == NULL
)
8023 case DIMEN_THIS_IMAGE
:
8024 gfc_error ("Bad array specification in ALLOCATE statement at %L",
8030 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8032 sym
= a
->expr
->symtree
->n
.sym
;
8034 /* TODO - check derived type components. */
8035 if (gfc_bt_struct (sym
->ts
.type
) || sym
->ts
.type
== BT_CLASS
)
8038 if ((ar
->start
[i
] != NULL
8039 && gfc_find_sym_in_expr (sym
, ar
->start
[i
]))
8040 || (ar
->end
[i
] != NULL
8041 && gfc_find_sym_in_expr (sym
, ar
->end
[i
])))
8043 gfc_error ("%qs must not appear in the array specification at "
8044 "%L in the same ALLOCATE statement where it is "
8045 "itself allocated", sym
->name
, &ar
->where
);
8051 for (i
= ar
->dimen
; i
< ar
->codimen
+ ar
->dimen
; i
++)
8053 if (ar
->dimen_type
[i
] == DIMEN_ELEMENT
8054 || ar
->dimen_type
[i
] == DIMEN_RANGE
)
8056 if (i
== (ar
->dimen
+ ar
->codimen
- 1))
8058 gfc_error ("Expected '*' in coindex specification in ALLOCATE "
8059 "statement at %L", &e
->where
);
8065 if (ar
->dimen_type
[i
] == DIMEN_STAR
&& i
== (ar
->dimen
+ ar
->codimen
- 1)
8066 && ar
->stride
[i
] == NULL
)
8069 gfc_error ("Bad coarray specification in ALLOCATE statement at %L",
8083 resolve_allocate_deallocate (gfc_code
*code
, const char *fcn
)
8085 gfc_expr
*stat
, *errmsg
, *pe
, *qe
;
8086 gfc_alloc
*a
, *p
, *q
;
8089 errmsg
= code
->expr2
;
8091 /* Check the stat variable. */
8094 gfc_check_vardef_context (stat
, false, false, false,
8095 _("STAT variable"));
8097 if ((stat
->ts
.type
!= BT_INTEGER
8098 && !(stat
->ref
&& (stat
->ref
->type
== REF_ARRAY
8099 || stat
->ref
->type
== REF_COMPONENT
)))
8101 gfc_error ("Stat-variable at %L must be a scalar INTEGER "
8102 "variable", &stat
->where
);
8104 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
8105 if (p
->expr
->symtree
->n
.sym
->name
== stat
->symtree
->n
.sym
->name
)
8107 gfc_ref
*ref1
, *ref2
;
8110 for (ref1
= p
->expr
->ref
, ref2
= stat
->ref
; ref1
&& ref2
;
8111 ref1
= ref1
->next
, ref2
= ref2
->next
)
8113 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
8115 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
8124 gfc_error ("Stat-variable at %L shall not be %sd within "
8125 "the same %s statement", &stat
->where
, fcn
, fcn
);
8131 /* Check the errmsg variable. */
8135 gfc_warning (0, "ERRMSG at %L is useless without a STAT tag",
8138 gfc_check_vardef_context (errmsg
, false, false, false,
8139 _("ERRMSG variable"));
8141 /* F18:R928 alloc-opt is ERRMSG = errmsg-variable
8142 F18:R930 errmsg-variable is scalar-default-char-variable
8143 F18:R906 default-char-variable is variable
8144 F18:C906 default-char-variable shall be default character. */
8145 if ((errmsg
->ts
.type
!= BT_CHARACTER
8147 && (errmsg
->ref
->type
== REF_ARRAY
8148 || errmsg
->ref
->type
== REF_COMPONENT
)))
8150 || errmsg
->ts
.kind
!= gfc_default_character_kind
)
8151 gfc_error ("ERRMSG variable at %L shall be a scalar default CHARACTER "
8152 "variable", &errmsg
->where
);
8154 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
8155 if (p
->expr
->symtree
->n
.sym
->name
== errmsg
->symtree
->n
.sym
->name
)
8157 gfc_ref
*ref1
, *ref2
;
8160 for (ref1
= p
->expr
->ref
, ref2
= errmsg
->ref
; ref1
&& ref2
;
8161 ref1
= ref1
->next
, ref2
= ref2
->next
)
8163 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
8165 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
8174 gfc_error ("Errmsg-variable at %L shall not be %sd within "
8175 "the same %s statement", &errmsg
->where
, fcn
, fcn
);
8181 /* Check that an allocate-object appears only once in the statement. */
8183 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
8186 for (q
= p
->next
; q
; q
= q
->next
)
8189 if (pe
->symtree
->n
.sym
->name
== qe
->symtree
->n
.sym
->name
)
8191 /* This is a potential collision. */
8192 gfc_ref
*pr
= pe
->ref
;
8193 gfc_ref
*qr
= qe
->ref
;
8195 /* Follow the references until
8196 a) They start to differ, in which case there is no error;
8197 you can deallocate a%b and a%c in a single statement
8198 b) Both of them stop, which is an error
8199 c) One of them stops, which is also an error. */
8202 if (pr
== NULL
&& qr
== NULL
)
8204 gfc_error ("Allocate-object at %L also appears at %L",
8205 &pe
->where
, &qe
->where
);
8208 else if (pr
!= NULL
&& qr
== NULL
)
8210 gfc_error ("Allocate-object at %L is subobject of"
8211 " object at %L", &pe
->where
, &qe
->where
);
8214 else if (pr
== NULL
&& qr
!= NULL
)
8216 gfc_error ("Allocate-object at %L is subobject of"
8217 " object at %L", &qe
->where
, &pe
->where
);
8220 /* Here, pr != NULL && qr != NULL */
8221 gcc_assert(pr
->type
== qr
->type
);
8222 if (pr
->type
== REF_ARRAY
)
8224 /* Handle cases like allocate(v(3)%x(3), v(2)%x(3)),
8226 gcc_assert (qr
->type
== REF_ARRAY
);
8228 if (pr
->next
&& qr
->next
)
8231 gfc_array_ref
*par
= &(pr
->u
.ar
);
8232 gfc_array_ref
*qar
= &(qr
->u
.ar
);
8234 for (i
=0; i
<par
->dimen
; i
++)
8236 if ((par
->start
[i
] != NULL
8237 || qar
->start
[i
] != NULL
)
8238 && gfc_dep_compare_expr (par
->start
[i
],
8239 qar
->start
[i
]) != 0)
8246 if (pr
->u
.c
.component
->name
!= qr
->u
.c
.component
->name
)
8259 if (strcmp (fcn
, "ALLOCATE") == 0)
8261 bool arr_alloc_wo_spec
= false;
8263 /* Resolving the expr3 in the loop over all objects to allocate would
8264 execute loop invariant code for each loop item. Therefore do it just
8266 if (code
->expr3
&& code
->expr3
->mold
8267 && code
->expr3
->ts
.type
== BT_DERIVED
)
8269 /* Default initialization via MOLD (non-polymorphic). */
8270 gfc_expr
*rhs
= gfc_default_initializer (&code
->expr3
->ts
);
8273 gfc_resolve_expr (rhs
);
8274 gfc_free_expr (code
->expr3
);
8278 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8279 resolve_allocate_expr (a
->expr
, code
, &arr_alloc_wo_spec
);
8281 if (arr_alloc_wo_spec
&& code
->expr3
)
8283 /* Mark the allocate to have to take the array specification
8285 code
->ext
.alloc
.arr_spec_from_expr3
= 1;
8290 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8291 resolve_deallocate_expr (a
->expr
);
8296 /************ SELECT CASE resolution subroutines ************/
8298 /* Callback function for our mergesort variant. Determines interval
8299 overlaps for CASEs. Return <0 if op1 < op2, 0 for overlap, >0 for
8300 op1 > op2. Assumes we're not dealing with the default case.
8301 We have op1 = (:L), (K:L) or (K:) and op2 = (:N), (M:N) or (M:).
8302 There are nine situations to check. */
8305 compare_cases (const gfc_case
*op1
, const gfc_case
*op2
)
8309 if (op1
->low
== NULL
) /* op1 = (:L) */
8311 /* op2 = (:N), so overlap. */
8313 /* op2 = (M:) or (M:N), L < M */
8314 if (op2
->low
!= NULL
8315 && gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8318 else if (op1
->high
== NULL
) /* op1 = (K:) */
8320 /* op2 = (M:), so overlap. */
8322 /* op2 = (:N) or (M:N), K > N */
8323 if (op2
->high
!= NULL
8324 && gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8327 else /* op1 = (K:L) */
8329 if (op2
->low
== NULL
) /* op2 = (:N), K > N */
8330 retval
= (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8332 else if (op2
->high
== NULL
) /* op2 = (M:), L < M */
8333 retval
= (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8335 else /* op2 = (M:N) */
8339 if (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8342 else if (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8351 /* Merge-sort a double linked case list, detecting overlap in the
8352 process. LIST is the head of the double linked case list before it
8353 is sorted. Returns the head of the sorted list if we don't see any
8354 overlap, or NULL otherwise. */
8357 check_case_overlap (gfc_case
*list
)
8359 gfc_case
*p
, *q
, *e
, *tail
;
8360 int insize
, nmerges
, psize
, qsize
, cmp
, overlap_seen
;
8362 /* If the passed list was empty, return immediately. */
8369 /* Loop unconditionally. The only exit from this loop is a return
8370 statement, when we've finished sorting the case list. */
8377 /* Count the number of merges we do in this pass. */
8380 /* Loop while there exists a merge to be done. */
8385 /* Count this merge. */
8388 /* Cut the list in two pieces by stepping INSIZE places
8389 forward in the list, starting from P. */
8392 for (i
= 0; i
< insize
; i
++)
8401 /* Now we have two lists. Merge them! */
8402 while (psize
> 0 || (qsize
> 0 && q
!= NULL
))
8404 /* See from which the next case to merge comes from. */
8407 /* P is empty so the next case must come from Q. */
8412 else if (qsize
== 0 || q
== NULL
)
8421 cmp
= compare_cases (p
, q
);
8424 /* The whole case range for P is less than the
8432 /* The whole case range for Q is greater than
8433 the case range for P. */
8440 /* The cases overlap, or they are the same
8441 element in the list. Either way, we must
8442 issue an error and get the next case from P. */
8443 /* FIXME: Sort P and Q by line number. */
8444 gfc_error ("CASE label at %L overlaps with CASE "
8445 "label at %L", &p
->where
, &q
->where
);
8453 /* Add the next element to the merged list. */
8462 /* P has now stepped INSIZE places along, and so has Q. So
8463 they're the same. */
8468 /* If we have done only one merge or none at all, we've
8469 finished sorting the cases. */
8478 /* Otherwise repeat, merging lists twice the size. */
8484 /* Check to see if an expression is suitable for use in a CASE statement.
8485 Makes sure that all case expressions are scalar constants of the same
8486 type. Return false if anything is wrong. */
8489 validate_case_label_expr (gfc_expr
*e
, gfc_expr
*case_expr
)
8491 if (e
== NULL
) return true;
8493 if (e
->ts
.type
!= case_expr
->ts
.type
)
8495 gfc_error ("Expression in CASE statement at %L must be of type %s",
8496 &e
->where
, gfc_basic_typename (case_expr
->ts
.type
));
8500 /* C805 (R808) For a given case-construct, each case-value shall be of
8501 the same type as case-expr. For character type, length differences
8502 are allowed, but the kind type parameters shall be the same. */
8504 if (case_expr
->ts
.type
== BT_CHARACTER
&& e
->ts
.kind
!= case_expr
->ts
.kind
)
8506 gfc_error ("Expression in CASE statement at %L must be of kind %d",
8507 &e
->where
, case_expr
->ts
.kind
);
8511 /* Convert the case value kind to that of case expression kind,
8514 if (e
->ts
.kind
!= case_expr
->ts
.kind
)
8515 gfc_convert_type_warn (e
, &case_expr
->ts
, 2, 0);
8519 gfc_error ("Expression in CASE statement at %L must be scalar",
8528 /* Given a completely parsed select statement, we:
8530 - Validate all expressions and code within the SELECT.
8531 - Make sure that the selection expression is not of the wrong type.
8532 - Make sure that no case ranges overlap.
8533 - Eliminate unreachable cases and unreachable code resulting from
8534 removing case labels.
8536 The standard does allow unreachable cases, e.g. CASE (5:3). But
8537 they are a hassle for code generation, and to prevent that, we just
8538 cut them out here. This is not necessary for overlapping cases
8539 because they are illegal and we never even try to generate code.
8541 We have the additional caveat that a SELECT construct could have
8542 been a computed GOTO in the source code. Fortunately we can fairly
8543 easily work around that here: The case_expr for a "real" SELECT CASE
8544 is in code->expr1, but for a computed GOTO it is in code->expr2. All
8545 we have to do is make sure that the case_expr is a scalar integer
8549 resolve_select (gfc_code
*code
, bool select_type
)
8552 gfc_expr
*case_expr
;
8553 gfc_case
*cp
, *default_case
, *tail
, *head
;
8554 int seen_unreachable
;
8560 if (code
->expr1
== NULL
)
8562 /* This was actually a computed GOTO statement. */
8563 case_expr
= code
->expr2
;
8564 if (case_expr
->ts
.type
!= BT_INTEGER
|| case_expr
->rank
!= 0)
8565 gfc_error ("Selection expression in computed GOTO statement "
8566 "at %L must be a scalar integer expression",
8569 /* Further checking is not necessary because this SELECT was built
8570 by the compiler, so it should always be OK. Just move the
8571 case_expr from expr2 to expr so that we can handle computed
8572 GOTOs as normal SELECTs from here on. */
8573 code
->expr1
= code
->expr2
;
8578 case_expr
= code
->expr1
;
8579 type
= case_expr
->ts
.type
;
8582 if (type
!= BT_LOGICAL
&& type
!= BT_INTEGER
&& type
!= BT_CHARACTER
)
8584 gfc_error ("Argument of SELECT statement at %L cannot be %s",
8585 &case_expr
->where
, gfc_typename (case_expr
));
8587 /* Punt. Going on here just produce more garbage error messages. */
8592 if (!select_type
&& case_expr
->rank
!= 0)
8594 gfc_error ("Argument of SELECT statement at %L must be a scalar "
8595 "expression", &case_expr
->where
);
8601 /* Raise a warning if an INTEGER case value exceeds the range of
8602 the case-expr. Later, all expressions will be promoted to the
8603 largest kind of all case-labels. */
8605 if (type
== BT_INTEGER
)
8606 for (body
= code
->block
; body
; body
= body
->block
)
8607 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8610 && gfc_check_integer_range (cp
->low
->value
.integer
,
8611 case_expr
->ts
.kind
) != ARITH_OK
)
8612 gfc_warning (0, "Expression in CASE statement at %L is "
8613 "not in the range of %s", &cp
->low
->where
,
8614 gfc_typename (case_expr
));
8617 && cp
->low
!= cp
->high
8618 && gfc_check_integer_range (cp
->high
->value
.integer
,
8619 case_expr
->ts
.kind
) != ARITH_OK
)
8620 gfc_warning (0, "Expression in CASE statement at %L is "
8621 "not in the range of %s", &cp
->high
->where
,
8622 gfc_typename (case_expr
));
8625 /* PR 19168 has a long discussion concerning a mismatch of the kinds
8626 of the SELECT CASE expression and its CASE values. Walk the lists
8627 of case values, and if we find a mismatch, promote case_expr to
8628 the appropriate kind. */
8630 if (type
== BT_LOGICAL
|| type
== BT_INTEGER
)
8632 for (body
= code
->block
; body
; body
= body
->block
)
8634 /* Walk the case label list. */
8635 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8637 /* Intercept the DEFAULT case. It does not have a kind. */
8638 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8641 /* Unreachable case ranges are discarded, so ignore. */
8642 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8643 && cp
->low
!= cp
->high
8644 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8648 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->low
))
8649 gfc_convert_type_warn (case_expr
, &cp
->low
->ts
, 2, 0);
8651 if (cp
->high
!= NULL
8652 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->high
))
8653 gfc_convert_type_warn (case_expr
, &cp
->high
->ts
, 2, 0);
8658 /* Assume there is no DEFAULT case. */
8659 default_case
= NULL
;
8664 for (body
= code
->block
; body
; body
= body
->block
)
8666 /* Assume the CASE list is OK, and all CASE labels can be matched. */
8668 seen_unreachable
= 0;
8670 /* Walk the case label list, making sure that all case labels
8672 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8674 /* Count the number of cases in the whole construct. */
8677 /* Intercept the DEFAULT case. */
8678 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8680 if (default_case
!= NULL
)
8682 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8683 "by a second DEFAULT CASE at %L",
8684 &default_case
->where
, &cp
->where
);
8695 /* Deal with single value cases and case ranges. Errors are
8696 issued from the validation function. */
8697 if (!validate_case_label_expr (cp
->low
, case_expr
)
8698 || !validate_case_label_expr (cp
->high
, case_expr
))
8704 if (type
== BT_LOGICAL
8705 && ((cp
->low
== NULL
|| cp
->high
== NULL
)
8706 || cp
->low
!= cp
->high
))
8708 gfc_error ("Logical range in CASE statement at %L is not "
8709 "allowed", &cp
->low
->where
);
8714 if (type
== BT_LOGICAL
&& cp
->low
->expr_type
== EXPR_CONSTANT
)
8717 value
= cp
->low
->value
.logical
== 0 ? 2 : 1;
8718 if (value
& seen_logical
)
8720 gfc_error ("Constant logical value in CASE statement "
8721 "is repeated at %L",
8726 seen_logical
|= value
;
8729 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8730 && cp
->low
!= cp
->high
8731 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8733 if (warn_surprising
)
8734 gfc_warning (OPT_Wsurprising
,
8735 "Range specification at %L can never be matched",
8738 cp
->unreachable
= 1;
8739 seen_unreachable
= 1;
8743 /* If the case range can be matched, it can also overlap with
8744 other cases. To make sure it does not, we put it in a
8745 double linked list here. We sort that with a merge sort
8746 later on to detect any overlapping cases. */
8750 head
->right
= head
->left
= NULL
;
8755 tail
->right
->left
= tail
;
8762 /* It there was a failure in the previous case label, give up
8763 for this case label list. Continue with the next block. */
8767 /* See if any case labels that are unreachable have been seen.
8768 If so, we eliminate them. This is a bit of a kludge because
8769 the case lists for a single case statement (label) is a
8770 single forward linked lists. */
8771 if (seen_unreachable
)
8773 /* Advance until the first case in the list is reachable. */
8774 while (body
->ext
.block
.case_list
!= NULL
8775 && body
->ext
.block
.case_list
->unreachable
)
8777 gfc_case
*n
= body
->ext
.block
.case_list
;
8778 body
->ext
.block
.case_list
= body
->ext
.block
.case_list
->next
;
8780 gfc_free_case_list (n
);
8783 /* Strip all other unreachable cases. */
8784 if (body
->ext
.block
.case_list
)
8786 for (cp
= body
->ext
.block
.case_list
; cp
&& cp
->next
; cp
= cp
->next
)
8788 if (cp
->next
->unreachable
)
8790 gfc_case
*n
= cp
->next
;
8791 cp
->next
= cp
->next
->next
;
8793 gfc_free_case_list (n
);
8800 /* See if there were overlapping cases. If the check returns NULL,
8801 there was overlap. In that case we don't do anything. If head
8802 is non-NULL, we prepend the DEFAULT case. The sorted list can
8803 then used during code generation for SELECT CASE constructs with
8804 a case expression of a CHARACTER type. */
8807 head
= check_case_overlap (head
);
8809 /* Prepend the default_case if it is there. */
8810 if (head
!= NULL
&& default_case
)
8812 default_case
->left
= NULL
;
8813 default_case
->right
= head
;
8814 head
->left
= default_case
;
8818 /* Eliminate dead blocks that may be the result if we've seen
8819 unreachable case labels for a block. */
8820 for (body
= code
; body
&& body
->block
; body
= body
->block
)
8822 if (body
->block
->ext
.block
.case_list
== NULL
)
8824 /* Cut the unreachable block from the code chain. */
8825 gfc_code
*c
= body
->block
;
8826 body
->block
= c
->block
;
8828 /* Kill the dead block, but not the blocks below it. */
8830 gfc_free_statements (c
);
8834 /* More than two cases is legal but insane for logical selects.
8835 Issue a warning for it. */
8836 if (warn_surprising
&& type
== BT_LOGICAL
&& ncases
> 2)
8837 gfc_warning (OPT_Wsurprising
,
8838 "Logical SELECT CASE block at %L has more that two cases",
8843 /* Check if a derived type is extensible. */
8846 gfc_type_is_extensible (gfc_symbol
*sym
)
8848 return !(sym
->attr
.is_bind_c
|| sym
->attr
.sequence
8849 || (sym
->attr
.is_class
8850 && sym
->components
->ts
.u
.derived
->attr
.unlimited_polymorphic
));
8855 resolve_types (gfc_namespace
*ns
);
8857 /* Resolve an associate-name: Resolve target and ensure the type-spec is
8858 correct as well as possibly the array-spec. */
8861 resolve_assoc_var (gfc_symbol
* sym
, bool resolve_target
)
8865 gcc_assert (sym
->assoc
);
8866 gcc_assert (sym
->attr
.flavor
== FL_VARIABLE
);
8868 /* If this is for SELECT TYPE, the target may not yet be set. In that
8869 case, return. Resolution will be called later manually again when
8871 target
= sym
->assoc
->target
;
8874 gcc_assert (!sym
->assoc
->dangling
);
8876 if (resolve_target
&& !gfc_resolve_expr (target
))
8879 /* For variable targets, we get some attributes from the target. */
8880 if (target
->expr_type
== EXPR_VARIABLE
)
8882 gfc_symbol
*tsym
, *dsym
;
8884 gcc_assert (target
->symtree
);
8885 tsym
= target
->symtree
->n
.sym
;
8887 if (gfc_expr_attr (target
).proc_pointer
)
8889 gfc_error ("Associating entity %qs at %L is a procedure pointer",
8890 tsym
->name
, &target
->where
);
8894 if (tsym
->attr
.flavor
== FL_PROCEDURE
&& tsym
->generic
8895 && (dsym
= gfc_find_dt_in_generic (tsym
)) != NULL
8896 && dsym
->attr
.flavor
== FL_DERIVED
)
8898 gfc_error ("Derived type %qs cannot be used as a variable at %L",
8899 tsym
->name
, &target
->where
);
8903 if (tsym
->attr
.flavor
== FL_PROCEDURE
)
8905 bool is_error
= true;
8906 if (tsym
->attr
.function
&& tsym
->result
== tsym
)
8907 for (gfc_namespace
*ns
= sym
->ns
; ns
; ns
= ns
->parent
)
8908 if (tsym
== ns
->proc_name
)
8915 gfc_error ("Associating entity %qs at %L is a procedure name",
8916 tsym
->name
, &target
->where
);
8921 sym
->attr
.asynchronous
= tsym
->attr
.asynchronous
;
8922 sym
->attr
.volatile_
= tsym
->attr
.volatile_
;
8924 sym
->attr
.target
= tsym
->attr
.target
8925 || gfc_expr_attr (target
).pointer
;
8926 if (is_subref_array (target
))
8927 sym
->attr
.subref_array_pointer
= 1;
8929 else if (target
->ts
.type
== BT_PROCEDURE
)
8931 gfc_error ("Associating selector-expression at %L yields a procedure",
8936 if (target
->expr_type
== EXPR_NULL
)
8938 gfc_error ("Selector at %L cannot be NULL()", &target
->where
);
8941 else if (target
->ts
.type
== BT_UNKNOWN
)
8943 gfc_error ("Selector at %L has no type", &target
->where
);
8947 /* Get type if this was not already set. Note that it can be
8948 some other type than the target in case this is a SELECT TYPE
8949 selector! So we must not update when the type is already there. */
8950 if (sym
->ts
.type
== BT_UNKNOWN
)
8951 sym
->ts
= target
->ts
;
8953 gcc_assert (sym
->ts
.type
!= BT_UNKNOWN
);
8955 /* See if this is a valid association-to-variable. */
8956 sym
->assoc
->variable
= (target
->expr_type
== EXPR_VARIABLE
8957 && !gfc_has_vector_subscript (target
));
8959 /* Finally resolve if this is an array or not. */
8960 if (sym
->attr
.dimension
&& target
->rank
== 0)
8962 /* primary.c makes the assumption that a reference to an associate
8963 name followed by a left parenthesis is an array reference. */
8964 if (sym
->ts
.type
!= BT_CHARACTER
)
8965 gfc_error ("Associate-name %qs at %L is used as array",
8966 sym
->name
, &sym
->declared_at
);
8967 sym
->attr
.dimension
= 0;
8972 /* We cannot deal with class selectors that need temporaries. */
8973 if (target
->ts
.type
== BT_CLASS
8974 && gfc_ref_needs_temporary_p (target
->ref
))
8976 gfc_error ("CLASS selector at %L needs a temporary which is not "
8977 "yet implemented", &target
->where
);
8981 if (target
->ts
.type
== BT_CLASS
)
8982 gfc_fix_class_refs (target
);
8984 if (target
->rank
!= 0 && !sym
->attr
.select_rank_temporary
)
8987 /* The rank may be incorrectly guessed at parsing, therefore make sure
8988 it is corrected now. */
8989 if (sym
->ts
.type
!= BT_CLASS
&& (!sym
->as
|| sym
->assoc
->rankguessed
))
8992 sym
->as
= gfc_get_array_spec ();
8994 as
->rank
= target
->rank
;
8995 as
->type
= AS_DEFERRED
;
8996 as
->corank
= gfc_get_corank (target
);
8997 sym
->attr
.dimension
= 1;
8998 if (as
->corank
!= 0)
8999 sym
->attr
.codimension
= 1;
9001 else if (sym
->ts
.type
== BT_CLASS
&& (!CLASS_DATA (sym
)->as
|| sym
->assoc
->rankguessed
))
9003 if (!CLASS_DATA (sym
)->as
)
9004 CLASS_DATA (sym
)->as
= gfc_get_array_spec ();
9005 as
= CLASS_DATA (sym
)->as
;
9006 as
->rank
= target
->rank
;
9007 as
->type
= AS_DEFERRED
;
9008 as
->corank
= gfc_get_corank (target
);
9009 CLASS_DATA (sym
)->attr
.dimension
= 1;
9010 if (as
->corank
!= 0)
9011 CLASS_DATA (sym
)->attr
.codimension
= 1;
9014 else if (!sym
->attr
.select_rank_temporary
)
9016 /* target's rank is 0, but the type of the sym is still array valued,
9017 which has to be corrected. */
9018 if (sym
->ts
.type
== BT_CLASS
9019 && CLASS_DATA (sym
) && CLASS_DATA (sym
)->as
)
9022 symbol_attribute attr
;
9023 /* The associated variable's type is still the array type
9024 correct this now. */
9025 gfc_typespec
*ts
= &target
->ts
;
9028 for (ref
= target
->ref
; ref
!= NULL
; ref
= ref
->next
)
9033 ts
= &ref
->u
.c
.component
->ts
;
9036 if (ts
->type
== BT_CLASS
)
9037 ts
= &ts
->u
.derived
->components
->ts
;
9043 /* Create a scalar instance of the current class type. Because the
9044 rank of a class array goes into its name, the type has to be
9045 rebuild. The alternative of (re-)setting just the attributes
9046 and as in the current type, destroys the type also in other
9050 sym
->ts
.type
= BT_CLASS
;
9051 attr
= CLASS_DATA (sym
)->attr
;
9053 attr
.associate_var
= 1;
9054 attr
.dimension
= attr
.codimension
= 0;
9055 attr
.class_pointer
= 1;
9056 if (!gfc_build_class_symbol (&sym
->ts
, &attr
, &as
))
9058 /* Make sure the _vptr is set. */
9059 c
= gfc_find_component (sym
->ts
.u
.derived
, "_vptr", true, true, NULL
);
9060 if (c
->ts
.u
.derived
== NULL
)
9061 c
->ts
.u
.derived
= gfc_find_derived_vtab (sym
->ts
.u
.derived
);
9062 CLASS_DATA (sym
)->attr
.pointer
= 1;
9063 CLASS_DATA (sym
)->attr
.class_pointer
= 1;
9064 gfc_set_sym_referenced (sym
->ts
.u
.derived
);
9065 gfc_commit_symbol (sym
->ts
.u
.derived
);
9066 /* _vptr now has the _vtab in it, change it to the _vtype. */
9067 if (c
->ts
.u
.derived
->attr
.vtab
)
9068 c
->ts
.u
.derived
= c
->ts
.u
.derived
->ts
.u
.derived
;
9069 c
->ts
.u
.derived
->ns
->types_resolved
= 0;
9070 resolve_types (c
->ts
.u
.derived
->ns
);
9074 /* Mark this as an associate variable. */
9075 sym
->attr
.associate_var
= 1;
9077 /* Fix up the type-spec for CHARACTER types. */
9078 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.select_type_temporary
)
9081 sym
->ts
.u
.cl
= target
->ts
.u
.cl
;
9083 if (sym
->ts
.deferred
&& target
->expr_type
== EXPR_VARIABLE
9084 && target
->symtree
->n
.sym
->attr
.dummy
9085 && sym
->ts
.u
.cl
== target
->ts
.u
.cl
)
9087 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
9088 sym
->ts
.deferred
= 1;
9091 if (!sym
->ts
.u
.cl
->length
9092 && !sym
->ts
.deferred
9093 && target
->expr_type
== EXPR_CONSTANT
)
9095 sym
->ts
.u
.cl
->length
=
9096 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
9097 target
->value
.character
.length
);
9099 else if ((!sym
->ts
.u
.cl
->length
9100 || sym
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
)
9101 && target
->expr_type
!= EXPR_VARIABLE
)
9103 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
9104 sym
->ts
.deferred
= 1;
9106 /* This is reset in trans-stmt.c after the assignment
9107 of the target expression to the associate name. */
9108 sym
->attr
.allocatable
= 1;
9112 /* If the target is a good class object, so is the associate variable. */
9113 if (sym
->ts
.type
== BT_CLASS
&& gfc_expr_attr (target
).class_ok
)
9114 sym
->attr
.class_ok
= 1;
9118 /* Ensure that SELECT TYPE expressions have the correct rank and a full
9119 array reference, where necessary. The symbols are artificial and so
9120 the dimension attribute and arrayspec can also be set. In addition,
9121 sometimes the expr1 arrives as BT_DERIVED, when the symbol is BT_CLASS.
9122 This is corrected here as well.*/
9125 fixup_array_ref (gfc_expr
**expr1
, gfc_expr
*expr2
,
9126 int rank
, gfc_ref
*ref
)
9128 gfc_ref
*nref
= (*expr1
)->ref
;
9129 gfc_symbol
*sym1
= (*expr1
)->symtree
->n
.sym
;
9130 gfc_symbol
*sym2
= expr2
? expr2
->symtree
->n
.sym
: NULL
;
9131 (*expr1
)->rank
= rank
;
9132 if (sym1
->ts
.type
== BT_CLASS
)
9134 if ((*expr1
)->ts
.type
!= BT_CLASS
)
9135 (*expr1
)->ts
= sym1
->ts
;
9137 CLASS_DATA (sym1
)->attr
.dimension
= 1;
9138 if (CLASS_DATA (sym1
)->as
== NULL
&& sym2
)
9139 CLASS_DATA (sym1
)->as
9140 = gfc_copy_array_spec (CLASS_DATA (sym2
)->as
);
9144 sym1
->attr
.dimension
= 1;
9145 if (sym1
->as
== NULL
&& sym2
)
9146 sym1
->as
= gfc_copy_array_spec (sym2
->as
);
9149 for (; nref
; nref
= nref
->next
)
9150 if (nref
->next
== NULL
)
9153 if (ref
&& nref
&& nref
->type
!= REF_ARRAY
)
9154 nref
->next
= gfc_copy_ref (ref
);
9155 else if (ref
&& !nref
)
9156 (*expr1
)->ref
= gfc_copy_ref (ref
);
9161 build_loc_call (gfc_expr
*sym_expr
)
9164 loc_call
= gfc_get_expr ();
9165 loc_call
->expr_type
= EXPR_FUNCTION
;
9166 gfc_get_sym_tree ("_loc", gfc_current_ns
, &loc_call
->symtree
, false);
9167 loc_call
->symtree
->n
.sym
->attr
.flavor
= FL_PROCEDURE
;
9168 loc_call
->symtree
->n
.sym
->attr
.intrinsic
= 1;
9169 loc_call
->symtree
->n
.sym
->result
= loc_call
->symtree
->n
.sym
;
9170 gfc_commit_symbol (loc_call
->symtree
->n
.sym
);
9171 loc_call
->ts
.type
= BT_INTEGER
;
9172 loc_call
->ts
.kind
= gfc_index_integer_kind
;
9173 loc_call
->value
.function
.isym
= gfc_intrinsic_function_by_id (GFC_ISYM_LOC
);
9174 loc_call
->value
.function
.actual
= gfc_get_actual_arglist ();
9175 loc_call
->value
.function
.actual
->expr
= sym_expr
;
9176 loc_call
->where
= sym_expr
->where
;
9180 /* Resolve a SELECT TYPE statement. */
9183 resolve_select_type (gfc_code
*code
, gfc_namespace
*old_ns
)
9185 gfc_symbol
*selector_type
;
9186 gfc_code
*body
, *new_st
, *if_st
, *tail
;
9187 gfc_code
*class_is
= NULL
, *default_case
= NULL
;
9190 char name
[GFC_MAX_SYMBOL_LEN
];
9194 gfc_ref
* ref
= NULL
;
9195 gfc_expr
*selector_expr
= NULL
;
9197 ns
= code
->ext
.block
.ns
;
9200 /* Check for F03:C813. */
9201 if (code
->expr1
->ts
.type
!= BT_CLASS
9202 && !(code
->expr2
&& code
->expr2
->ts
.type
== BT_CLASS
))
9204 gfc_error ("Selector shall be polymorphic in SELECT TYPE statement "
9205 "at %L", &code
->loc
);
9209 if (!code
->expr1
->symtree
->n
.sym
->attr
.class_ok
)
9214 gfc_ref
*ref2
= NULL
;
9215 for (ref
= code
->expr2
->ref
; ref
!= NULL
; ref
= ref
->next
)
9216 if (ref
->type
== REF_COMPONENT
9217 && ref
->u
.c
.component
->ts
.type
== BT_CLASS
)
9222 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
9223 code
->expr1
->symtree
->n
.sym
->ts
= ref2
->u
.c
.component
->ts
;
9224 selector_type
= CLASS_DATA (ref2
->u
.c
.component
)->ts
.u
.derived
;
9228 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
9229 code
->expr1
->symtree
->n
.sym
->ts
= code
->expr2
->ts
;
9230 selector_type
= CLASS_DATA (code
->expr2
)->ts
.u
.derived
;
9233 if (code
->expr2
->rank
&& CLASS_DATA (code
->expr1
)->as
)
9234 CLASS_DATA (code
->expr1
)->as
->rank
= code
->expr2
->rank
;
9236 /* F2008: C803 The selector expression must not be coindexed. */
9237 if (gfc_is_coindexed (code
->expr2
))
9239 gfc_error ("Selector at %L must not be coindexed",
9240 &code
->expr2
->where
);
9247 selector_type
= CLASS_DATA (code
->expr1
)->ts
.u
.derived
;
9249 if (gfc_is_coindexed (code
->expr1
))
9251 gfc_error ("Selector at %L must not be coindexed",
9252 &code
->expr1
->where
);
9257 /* Loop over TYPE IS / CLASS IS cases. */
9258 for (body
= code
->block
; body
; body
= body
->block
)
9260 c
= body
->ext
.block
.case_list
;
9264 /* Check for repeated cases. */
9265 for (tail
= code
->block
; tail
; tail
= tail
->block
)
9267 gfc_case
*d
= tail
->ext
.block
.case_list
;
9271 if (c
->ts
.type
== d
->ts
.type
9272 && ((c
->ts
.type
== BT_DERIVED
9273 && c
->ts
.u
.derived
&& d
->ts
.u
.derived
9274 && !strcmp (c
->ts
.u
.derived
->name
,
9275 d
->ts
.u
.derived
->name
))
9276 || c
->ts
.type
== BT_UNKNOWN
9277 || (!(c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9278 && c
->ts
.kind
== d
->ts
.kind
)))
9280 gfc_error ("TYPE IS at %L overlaps with TYPE IS at %L",
9281 &c
->where
, &d
->where
);
9287 /* Check F03:C815. */
9288 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9289 && !selector_type
->attr
.unlimited_polymorphic
9290 && !gfc_type_is_extensible (c
->ts
.u
.derived
))
9292 gfc_error ("Derived type %qs at %L must be extensible",
9293 c
->ts
.u
.derived
->name
, &c
->where
);
9298 /* Check F03:C816. */
9299 if (c
->ts
.type
!= BT_UNKNOWN
&& !selector_type
->attr
.unlimited_polymorphic
9300 && ((c
->ts
.type
!= BT_DERIVED
&& c
->ts
.type
!= BT_CLASS
)
9301 || !gfc_type_is_extension_of (selector_type
, c
->ts
.u
.derived
)))
9303 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9304 gfc_error ("Derived type %qs at %L must be an extension of %qs",
9305 c
->ts
.u
.derived
->name
, &c
->where
, selector_type
->name
);
9307 gfc_error ("Unexpected intrinsic type %qs at %L",
9308 gfc_basic_typename (c
->ts
.type
), &c
->where
);
9313 /* Check F03:C814. */
9314 if (c
->ts
.type
== BT_CHARACTER
9315 && (c
->ts
.u
.cl
->length
!= NULL
|| c
->ts
.deferred
))
9317 gfc_error ("The type-spec at %L shall specify that each length "
9318 "type parameter is assumed", &c
->where
);
9323 /* Intercept the DEFAULT case. */
9324 if (c
->ts
.type
== BT_UNKNOWN
)
9326 /* Check F03:C818. */
9329 gfc_error ("The DEFAULT CASE at %L cannot be followed "
9330 "by a second DEFAULT CASE at %L",
9331 &default_case
->ext
.block
.case_list
->where
, &c
->where
);
9336 default_case
= body
;
9343 /* Transform SELECT TYPE statement to BLOCK and associate selector to
9344 target if present. If there are any EXIT statements referring to the
9345 SELECT TYPE construct, this is no problem because the gfc_code
9346 reference stays the same and EXIT is equally possible from the BLOCK
9347 it is changed to. */
9348 code
->op
= EXEC_BLOCK
;
9351 gfc_association_list
* assoc
;
9353 assoc
= gfc_get_association_list ();
9354 assoc
->st
= code
->expr1
->symtree
;
9355 assoc
->target
= gfc_copy_expr (code
->expr2
);
9356 assoc
->target
->where
= code
->expr2
->where
;
9357 /* assoc->variable will be set by resolve_assoc_var. */
9359 code
->ext
.block
.assoc
= assoc
;
9360 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
9362 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
9365 code
->ext
.block
.assoc
= NULL
;
9367 /* Ensure that the selector rank and arrayspec are available to
9368 correct expressions in which they might be missing. */
9369 if (code
->expr2
&& code
->expr2
->rank
)
9371 rank
= code
->expr2
->rank
;
9372 for (ref
= code
->expr2
->ref
; ref
; ref
= ref
->next
)
9373 if (ref
->next
== NULL
)
9375 if (ref
&& ref
->type
== REF_ARRAY
)
9376 ref
= gfc_copy_ref (ref
);
9378 /* Fixup expr1 if necessary. */
9380 fixup_array_ref (&code
->expr1
, code
->expr2
, rank
, ref
);
9382 else if (code
->expr1
->rank
)
9384 rank
= code
->expr1
->rank
;
9385 for (ref
= code
->expr1
->ref
; ref
; ref
= ref
->next
)
9386 if (ref
->next
== NULL
)
9388 if (ref
&& ref
->type
== REF_ARRAY
)
9389 ref
= gfc_copy_ref (ref
);
9392 /* Add EXEC_SELECT to switch on type. */
9393 new_st
= gfc_get_code (code
->op
);
9394 new_st
->expr1
= code
->expr1
;
9395 new_st
->expr2
= code
->expr2
;
9396 new_st
->block
= code
->block
;
9397 code
->expr1
= code
->expr2
= NULL
;
9402 ns
->code
->next
= new_st
;
9404 code
->op
= EXEC_SELECT_TYPE
;
9406 /* Use the intrinsic LOC function to generate an integer expression
9407 for the vtable of the selector. Note that the rank of the selector
9408 expression has to be set to zero. */
9409 gfc_add_vptr_component (code
->expr1
);
9410 code
->expr1
->rank
= 0;
9411 code
->expr1
= build_loc_call (code
->expr1
);
9412 selector_expr
= code
->expr1
->value
.function
.actual
->expr
;
9414 /* Loop over TYPE IS / CLASS IS cases. */
9415 for (body
= code
->block
; body
; body
= body
->block
)
9419 c
= body
->ext
.block
.case_list
;
9421 /* Generate an index integer expression for address of the
9422 TYPE/CLASS vtable and store it in c->low. The hash expression
9423 is stored in c->high and is used to resolve intrinsic cases. */
9424 if (c
->ts
.type
!= BT_UNKNOWN
)
9426 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9428 vtab
= gfc_find_derived_vtab (c
->ts
.u
.derived
);
9430 c
->high
= gfc_get_int_expr (gfc_integer_4_kind
, NULL
,
9431 c
->ts
.u
.derived
->hash_value
);
9435 vtab
= gfc_find_vtab (&c
->ts
);
9436 gcc_assert (vtab
&& CLASS_DATA (vtab
)->initializer
);
9437 e
= CLASS_DATA (vtab
)->initializer
;
9438 c
->high
= gfc_copy_expr (e
);
9439 if (c
->high
->ts
.kind
!= gfc_integer_4_kind
)
9442 ts
.kind
= gfc_integer_4_kind
;
9443 ts
.type
= BT_INTEGER
;
9444 gfc_convert_type_warn (c
->high
, &ts
, 2, 0);
9448 e
= gfc_lval_expr_from_sym (vtab
);
9449 c
->low
= build_loc_call (e
);
9454 /* Associate temporary to selector. This should only be done
9455 when this case is actually true, so build a new ASSOCIATE
9456 that does precisely this here (instead of using the
9459 if (c
->ts
.type
== BT_CLASS
)
9460 sprintf (name
, "__tmp_class_%s", c
->ts
.u
.derived
->name
);
9461 else if (c
->ts
.type
== BT_DERIVED
)
9462 sprintf (name
, "__tmp_type_%s", c
->ts
.u
.derived
->name
);
9463 else if (c
->ts
.type
== BT_CHARACTER
)
9465 HOST_WIDE_INT charlen
= 0;
9466 if (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9467 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9468 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9469 snprintf (name
, sizeof (name
),
9470 "__tmp_%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9471 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9474 sprintf (name
, "__tmp_%s_%d", gfc_basic_typename (c
->ts
.type
),
9477 st
= gfc_find_symtree (ns
->sym_root
, name
);
9478 gcc_assert (st
->n
.sym
->assoc
);
9479 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9480 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9481 if (c
->ts
.type
!= BT_CLASS
&& c
->ts
.type
!= BT_UNKNOWN
)
9483 gfc_add_data_component (st
->n
.sym
->assoc
->target
);
9484 /* Fixup the target expression if necessary. */
9486 fixup_array_ref (&st
->n
.sym
->assoc
->target
, NULL
, rank
, ref
);
9489 new_st
= gfc_get_code (EXEC_BLOCK
);
9490 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9491 new_st
->ext
.block
.ns
->code
= body
->next
;
9492 body
->next
= new_st
;
9494 /* Chain in the new list only if it is marked as dangling. Otherwise
9495 there is a CASE label overlap and this is already used. Just ignore,
9496 the error is diagnosed elsewhere. */
9497 if (st
->n
.sym
->assoc
->dangling
)
9499 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9500 st
->n
.sym
->assoc
->dangling
= 0;
9503 resolve_assoc_var (st
->n
.sym
, false);
9506 /* Take out CLASS IS cases for separate treatment. */
9508 while (body
&& body
->block
)
9510 if (body
->block
->ext
.block
.case_list
->ts
.type
== BT_CLASS
)
9512 /* Add to class_is list. */
9513 if (class_is
== NULL
)
9515 class_is
= body
->block
;
9520 for (tail
= class_is
; tail
->block
; tail
= tail
->block
) ;
9521 tail
->block
= body
->block
;
9524 /* Remove from EXEC_SELECT list. */
9525 body
->block
= body
->block
->block
;
9538 /* Add a default case to hold the CLASS IS cases. */
9539 for (tail
= code
; tail
->block
; tail
= tail
->block
) ;
9540 tail
->block
= gfc_get_code (EXEC_SELECT_TYPE
);
9542 tail
->ext
.block
.case_list
= gfc_get_case ();
9543 tail
->ext
.block
.case_list
->ts
.type
= BT_UNKNOWN
;
9545 default_case
= tail
;
9548 /* More than one CLASS IS block? */
9549 if (class_is
->block
)
9553 /* Sort CLASS IS blocks by extension level. */
9557 for (c1
= &class_is
; (*c1
) && (*c1
)->block
; c1
= &((*c1
)->block
))
9560 /* F03:C817 (check for doubles). */
9561 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->hash_value
9562 == c2
->ext
.block
.case_list
->ts
.u
.derived
->hash_value
)
9564 gfc_error ("Double CLASS IS block in SELECT TYPE "
9566 &c2
->ext
.block
.case_list
->where
);
9569 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
9570 < c2
->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
)
9573 (*c1
)->block
= c2
->block
;
9583 /* Generate IF chain. */
9584 if_st
= gfc_get_code (EXEC_IF
);
9586 for (body
= class_is
; body
; body
= body
->block
)
9588 new_st
->block
= gfc_get_code (EXEC_IF
);
9589 new_st
= new_st
->block
;
9590 /* Set up IF condition: Call _gfortran_is_extension_of. */
9591 new_st
->expr1
= gfc_get_expr ();
9592 new_st
->expr1
->expr_type
= EXPR_FUNCTION
;
9593 new_st
->expr1
->ts
.type
= BT_LOGICAL
;
9594 new_st
->expr1
->ts
.kind
= 4;
9595 new_st
->expr1
->value
.function
.name
= gfc_get_string (PREFIX ("is_extension_of"));
9596 new_st
->expr1
->value
.function
.isym
= XCNEW (gfc_intrinsic_sym
);
9597 new_st
->expr1
->value
.function
.isym
->id
= GFC_ISYM_EXTENDS_TYPE_OF
;
9598 /* Set up arguments. */
9599 new_st
->expr1
->value
.function
.actual
= gfc_get_actual_arglist ();
9600 new_st
->expr1
->value
.function
.actual
->expr
= gfc_get_variable_expr (selector_expr
->symtree
);
9601 new_st
->expr1
->value
.function
.actual
->expr
->where
= code
->loc
;
9602 new_st
->expr1
->where
= code
->loc
;
9603 gfc_add_vptr_component (new_st
->expr1
->value
.function
.actual
->expr
);
9604 vtab
= gfc_find_derived_vtab (body
->ext
.block
.case_list
->ts
.u
.derived
);
9605 st
= gfc_find_symtree (vtab
->ns
->sym_root
, vtab
->name
);
9606 new_st
->expr1
->value
.function
.actual
->next
= gfc_get_actual_arglist ();
9607 new_st
->expr1
->value
.function
.actual
->next
->expr
= gfc_get_variable_expr (st
);
9608 new_st
->expr1
->value
.function
.actual
->next
->expr
->where
= code
->loc
;
9609 new_st
->next
= body
->next
;
9611 if (default_case
->next
)
9613 new_st
->block
= gfc_get_code (EXEC_IF
);
9614 new_st
= new_st
->block
;
9615 new_st
->next
= default_case
->next
;
9618 /* Replace CLASS DEFAULT code by the IF chain. */
9619 default_case
->next
= if_st
;
9622 /* Resolve the internal code. This cannot be done earlier because
9623 it requires that the sym->assoc of selectors is set already. */
9624 gfc_current_ns
= ns
;
9625 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9626 gfc_current_ns
= old_ns
;
9633 /* Resolve a SELECT RANK statement. */
9636 resolve_select_rank (gfc_code
*code
, gfc_namespace
*old_ns
)
9639 gfc_code
*body
, *new_st
, *tail
;
9641 char tname
[GFC_MAX_SYMBOL_LEN
];
9642 char name
[2 * GFC_MAX_SYMBOL_LEN
];
9644 gfc_expr
*selector_expr
= NULL
;
9646 HOST_WIDE_INT charlen
= 0;
9648 ns
= code
->ext
.block
.ns
;
9651 code
->op
= EXEC_BLOCK
;
9654 gfc_association_list
* assoc
;
9656 assoc
= gfc_get_association_list ();
9657 assoc
->st
= code
->expr1
->symtree
;
9658 assoc
->target
= gfc_copy_expr (code
->expr2
);
9659 assoc
->target
->where
= code
->expr2
->where
;
9660 /* assoc->variable will be set by resolve_assoc_var. */
9662 code
->ext
.block
.assoc
= assoc
;
9663 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
9665 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
9668 code
->ext
.block
.assoc
= NULL
;
9670 /* Loop over RANK cases. Note that returning on the errors causes a
9671 cascade of further errors because the case blocks do not compile
9673 for (body
= code
->block
; body
; body
= body
->block
)
9675 c
= body
->ext
.block
.case_list
;
9677 case_value
= (int) mpz_get_si (c
->low
->value
.integer
);
9681 /* Check for repeated cases. */
9682 for (tail
= code
->block
; tail
; tail
= tail
->block
)
9684 gfc_case
*d
= tail
->ext
.block
.case_list
;
9690 /* Check F2018: C1153. */
9691 if (!c
->low
&& !d
->low
)
9692 gfc_error ("RANK DEFAULT at %L is repeated at %L",
9693 &c
->where
, &d
->where
);
9695 if (!c
->low
|| !d
->low
)
9698 /* Check F2018: C1153. */
9699 case_value2
= (int) mpz_get_si (d
->low
->value
.integer
);
9700 if ((case_value
== case_value2
) && case_value
== -1)
9701 gfc_error ("RANK (*) at %L is repeated at %L",
9702 &c
->where
, &d
->where
);
9703 else if (case_value
== case_value2
)
9704 gfc_error ("RANK (%i) at %L is repeated at %L",
9705 case_value
, &c
->where
, &d
->where
);
9711 /* Check F2018: C1155. */
9712 if (case_value
== -1 && (gfc_expr_attr (code
->expr1
).allocatable
9713 || gfc_expr_attr (code
->expr1
).pointer
))
9714 gfc_error ("RANK (*) at %L cannot be used with the pointer or "
9715 "allocatable selector at %L", &c
->where
, &code
->expr1
->where
);
9717 if (case_value
== -1 && (gfc_expr_attr (code
->expr1
).allocatable
9718 || gfc_expr_attr (code
->expr1
).pointer
))
9719 gfc_error ("RANK (*) at %L cannot be used with the pointer or "
9720 "allocatable selector at %L", &c
->where
, &code
->expr1
->where
);
9723 /* Add EXEC_SELECT to switch on rank. */
9724 new_st
= gfc_get_code (code
->op
);
9725 new_st
->expr1
= code
->expr1
;
9726 new_st
->expr2
= code
->expr2
;
9727 new_st
->block
= code
->block
;
9728 code
->expr1
= code
->expr2
= NULL
;
9733 ns
->code
->next
= new_st
;
9735 code
->op
= EXEC_SELECT_RANK
;
9737 selector_expr
= code
->expr1
;
9739 /* Loop over SELECT RANK cases. */
9740 for (body
= code
->block
; body
; body
= body
->block
)
9742 c
= body
->ext
.block
.case_list
;
9745 /* Pass on the default case. */
9749 /* Associate temporary to selector. This should only be done
9750 when this case is actually true, so build a new ASSOCIATE
9751 that does precisely this here (instead of using the
9753 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9754 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9755 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9757 if (c
->ts
.type
== BT_CLASS
)
9758 sprintf (tname
, "class_%s", c
->ts
.u
.derived
->name
);
9759 else if (c
->ts
.type
== BT_DERIVED
)
9760 sprintf (tname
, "type_%s", c
->ts
.u
.derived
->name
);
9761 else if (c
->ts
.type
!= BT_CHARACTER
)
9762 sprintf (tname
, "%s_%d", gfc_basic_typename (c
->ts
.type
), c
->ts
.kind
);
9764 sprintf (tname
, "%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9765 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9767 case_value
= (int) mpz_get_si (c
->low
->value
.integer
);
9768 if (case_value
>= 0)
9769 sprintf (name
, "__tmp_%s_rank_%d", tname
, case_value
);
9771 sprintf (name
, "__tmp_%s_rank_m%d", tname
, -case_value
);
9773 st
= gfc_find_symtree (ns
->sym_root
, name
);
9774 gcc_assert (st
->n
.sym
->assoc
);
9776 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9777 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9779 new_st
= gfc_get_code (EXEC_BLOCK
);
9780 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9781 new_st
->ext
.block
.ns
->code
= body
->next
;
9782 body
->next
= new_st
;
9784 /* Chain in the new list only if it is marked as dangling. Otherwise
9785 there is a CASE label overlap and this is already used. Just ignore,
9786 the error is diagnosed elsewhere. */
9787 if (st
->n
.sym
->assoc
->dangling
)
9789 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9790 st
->n
.sym
->assoc
->dangling
= 0;
9793 resolve_assoc_var (st
->n
.sym
, false);
9796 gfc_current_ns
= ns
;
9797 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9798 gfc_current_ns
= old_ns
;
9802 /* Resolve a transfer statement. This is making sure that:
9803 -- a derived type being transferred has only non-pointer components
9804 -- a derived type being transferred doesn't have private components, unless
9805 it's being transferred from the module where the type was defined
9806 -- we're not trying to transfer a whole assumed size array. */
9809 resolve_transfer (gfc_code
*code
)
9811 gfc_symbol
*sym
, *derived
;
9815 bool formatted
= false;
9816 gfc_dt
*dt
= code
->ext
.dt
;
9817 gfc_symbol
*dtio_sub
= NULL
;
9821 while (exp
!= NULL
&& exp
->expr_type
== EXPR_OP
9822 && exp
->value
.op
.op
== INTRINSIC_PARENTHESES
)
9823 exp
= exp
->value
.op
.op1
;
9825 if (exp
&& exp
->expr_type
== EXPR_NULL
9828 gfc_error ("Invalid context for NULL () intrinsic at %L",
9833 if (exp
== NULL
|| (exp
->expr_type
!= EXPR_VARIABLE
9834 && exp
->expr_type
!= EXPR_FUNCTION
9835 && exp
->expr_type
!= EXPR_STRUCTURE
))
9838 /* If we are reading, the variable will be changed. Note that
9839 code->ext.dt may be NULL if the TRANSFER is related to
9840 an INQUIRE statement -- but in this case, we are not reading, either. */
9841 if (dt
&& dt
->dt_io_kind
->value
.iokind
== M_READ
9842 && !gfc_check_vardef_context (exp
, false, false, false,
9846 const gfc_typespec
*ts
= exp
->expr_type
== EXPR_STRUCTURE
9847 || exp
->expr_type
== EXPR_FUNCTION
9848 ? &exp
->ts
: &exp
->symtree
->n
.sym
->ts
;
9850 /* Go to actual component transferred. */
9851 for (ref
= exp
->ref
; ref
; ref
= ref
->next
)
9852 if (ref
->type
== REF_COMPONENT
)
9853 ts
= &ref
->u
.c
.component
->ts
;
9855 if (dt
&& dt
->dt_io_kind
->value
.iokind
!= M_INQUIRE
9856 && (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
))
9858 derived
= ts
->u
.derived
;
9860 /* Determine when to use the formatted DTIO procedure. */
9861 if (dt
&& (dt
->format_expr
|| dt
->format_label
))
9864 write
= dt
->dt_io_kind
->value
.iokind
== M_WRITE
9865 || dt
->dt_io_kind
->value
.iokind
== M_PRINT
;
9866 dtio_sub
= gfc_find_specific_dtio_proc (derived
, write
, formatted
);
9868 if (dtio_sub
!= NULL
&& exp
->expr_type
== EXPR_VARIABLE
)
9871 sym
= exp
->symtree
->n
.sym
->ns
->proc_name
;
9872 /* Check to see if this is a nested DTIO call, with the
9873 dummy as the io-list object. */
9874 if (sym
&& sym
== dtio_sub
&& sym
->formal
9875 && sym
->formal
->sym
== exp
->symtree
->n
.sym
9876 && exp
->ref
== NULL
)
9878 if (!sym
->attr
.recursive
)
9880 gfc_error ("DTIO %s procedure at %L must be recursive",
9881 sym
->name
, &sym
->declared_at
);
9888 if (ts
->type
== BT_CLASS
&& dtio_sub
== NULL
)
9890 gfc_error ("Data transfer element at %L cannot be polymorphic unless "
9891 "it is processed by a defined input/output procedure",
9896 if (ts
->type
== BT_DERIVED
)
9898 /* Check that transferred derived type doesn't contain POINTER
9899 components unless it is processed by a defined input/output
9901 if (ts
->u
.derived
->attr
.pointer_comp
&& dtio_sub
== NULL
)
9903 gfc_error ("Data transfer element at %L cannot have POINTER "
9904 "components unless it is processed by a defined "
9905 "input/output procedure", &code
->loc
);
9910 if (ts
->u
.derived
->attr
.proc_pointer_comp
)
9912 gfc_error ("Data transfer element at %L cannot have "
9913 "procedure pointer components", &code
->loc
);
9917 if (ts
->u
.derived
->attr
.alloc_comp
&& dtio_sub
== NULL
)
9919 gfc_error ("Data transfer element at %L cannot have ALLOCATABLE "
9920 "components unless it is processed by a defined "
9921 "input/output procedure", &code
->loc
);
9925 /* C_PTR and C_FUNPTR have private components which means they cannot
9926 be printed. However, if -std=gnu and not -pedantic, allow
9927 the component to be printed to help debugging. */
9928 if (ts
->u
.derived
->ts
.f90_type
== BT_VOID
)
9930 if (!gfc_notify_std (GFC_STD_GNU
, "Data transfer element at %L "
9931 "cannot have PRIVATE components", &code
->loc
))
9934 else if (derived_inaccessible (ts
->u
.derived
) && dtio_sub
== NULL
)
9936 gfc_error ("Data transfer element at %L cannot have "
9937 "PRIVATE components unless it is processed by "
9938 "a defined input/output procedure", &code
->loc
);
9943 if (exp
->expr_type
== EXPR_STRUCTURE
)
9946 sym
= exp
->symtree
->n
.sym
;
9948 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SIZE
&& exp
->ref
9949 && exp
->ref
->type
== REF_ARRAY
&& exp
->ref
->u
.ar
.type
== AR_FULL
)
9951 gfc_error ("Data transfer element at %L cannot be a full reference to "
9952 "an assumed-size array", &code
->loc
);
9958 /*********** Toplevel code resolution subroutines ***********/
9960 /* Find the set of labels that are reachable from this block. We also
9961 record the last statement in each block. */
9964 find_reachable_labels (gfc_code
*block
)
9971 cs_base
->reachable_labels
= bitmap_alloc (&labels_obstack
);
9973 /* Collect labels in this block. We don't keep those corresponding
9974 to END {IF|SELECT}, these are checked in resolve_branch by going
9975 up through the code_stack. */
9976 for (c
= block
; c
; c
= c
->next
)
9978 if (c
->here
&& c
->op
!= EXEC_END_NESTED_BLOCK
)
9979 bitmap_set_bit (cs_base
->reachable_labels
, c
->here
->value
);
9982 /* Merge with labels from parent block. */
9985 gcc_assert (cs_base
->prev
->reachable_labels
);
9986 bitmap_ior_into (cs_base
->reachable_labels
,
9987 cs_base
->prev
->reachable_labels
);
9993 resolve_lock_unlock_event (gfc_code
*code
)
9995 if (code
->expr1
->expr_type
== EXPR_FUNCTION
9996 && code
->expr1
->value
.function
.isym
9997 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
9998 remove_caf_get_intrinsic (code
->expr1
);
10000 if ((code
->op
== EXEC_LOCK
|| code
->op
== EXEC_UNLOCK
)
10001 && (code
->expr1
->ts
.type
!= BT_DERIVED
10002 || code
->expr1
->expr_type
!= EXPR_VARIABLE
10003 || code
->expr1
->ts
.u
.derived
->from_intmod
!= INTMOD_ISO_FORTRAN_ENV
10004 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
!= ISOFORTRAN_LOCK_TYPE
10005 || code
->expr1
->rank
!= 0
10006 || (!gfc_is_coarray (code
->expr1
) &&
10007 !gfc_is_coindexed (code
->expr1
))))
10008 gfc_error ("Lock variable at %L must be a scalar of type LOCK_TYPE",
10009 &code
->expr1
->where
);
10010 else if ((code
->op
== EXEC_EVENT_POST
|| code
->op
== EXEC_EVENT_WAIT
)
10011 && (code
->expr1
->ts
.type
!= BT_DERIVED
10012 || code
->expr1
->expr_type
!= EXPR_VARIABLE
10013 || code
->expr1
->ts
.u
.derived
->from_intmod
10014 != INTMOD_ISO_FORTRAN_ENV
10015 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
10016 != ISOFORTRAN_EVENT_TYPE
10017 || code
->expr1
->rank
!= 0))
10018 gfc_error ("Event variable at %L must be a scalar of type EVENT_TYPE",
10019 &code
->expr1
->where
);
10020 else if (code
->op
== EXEC_EVENT_POST
&& !gfc_is_coarray (code
->expr1
)
10021 && !gfc_is_coindexed (code
->expr1
))
10022 gfc_error ("Event variable argument at %L must be a coarray or coindexed",
10023 &code
->expr1
->where
);
10024 else if (code
->op
== EXEC_EVENT_WAIT
&& !gfc_is_coarray (code
->expr1
))
10025 gfc_error ("Event variable argument at %L must be a coarray but not "
10026 "coindexed", &code
->expr1
->where
);
10030 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
10031 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
10032 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
10033 &code
->expr2
->where
);
10036 && !gfc_check_vardef_context (code
->expr2
, false, false, false,
10037 _("STAT variable")))
10040 /* Check ERRMSG. */
10042 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
10043 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
10044 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
10045 &code
->expr3
->where
);
10048 && !gfc_check_vardef_context (code
->expr3
, false, false, false,
10049 _("ERRMSG variable")))
10052 /* Check for LOCK the ACQUIRED_LOCK. */
10053 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
10054 && (code
->expr4
->ts
.type
!= BT_LOGICAL
|| code
->expr4
->rank
!= 0
10055 || code
->expr4
->expr_type
!= EXPR_VARIABLE
))
10056 gfc_error ("ACQUIRED_LOCK= argument at %L must be a scalar LOGICAL "
10057 "variable", &code
->expr4
->where
);
10059 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
10060 && !gfc_check_vardef_context (code
->expr4
, false, false, false,
10061 _("ACQUIRED_LOCK variable")))
10064 /* Check for EVENT WAIT the UNTIL_COUNT. */
10065 if (code
->op
== EXEC_EVENT_WAIT
&& code
->expr4
)
10067 if (!gfc_resolve_expr (code
->expr4
) || code
->expr4
->ts
.type
!= BT_INTEGER
10068 || code
->expr4
->rank
!= 0)
10069 gfc_error ("UNTIL_COUNT= argument at %L must be a scalar INTEGER "
10070 "expression", &code
->expr4
->where
);
10076 resolve_critical (gfc_code
*code
)
10078 gfc_symtree
*symtree
;
10079 gfc_symbol
*lock_type
;
10080 char name
[GFC_MAX_SYMBOL_LEN
];
10081 static int serial
= 0;
10083 if (flag_coarray
!= GFC_FCOARRAY_LIB
)
10086 symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
10087 GFC_PREFIX ("lock_type"));
10089 lock_type
= symtree
->n
.sym
;
10092 if (gfc_get_sym_tree (GFC_PREFIX ("lock_type"), gfc_current_ns
, &symtree
,
10094 gcc_unreachable ();
10095 lock_type
= symtree
->n
.sym
;
10096 lock_type
->attr
.flavor
= FL_DERIVED
;
10097 lock_type
->attr
.zero_comp
= 1;
10098 lock_type
->from_intmod
= INTMOD_ISO_FORTRAN_ENV
;
10099 lock_type
->intmod_sym_id
= ISOFORTRAN_LOCK_TYPE
;
10102 sprintf(name
, GFC_PREFIX ("lock_var") "%d",serial
++);
10103 if (gfc_get_sym_tree (name
, gfc_current_ns
, &symtree
, false) != 0)
10104 gcc_unreachable ();
10106 code
->resolved_sym
= symtree
->n
.sym
;
10107 symtree
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
10108 symtree
->n
.sym
->attr
.referenced
= 1;
10109 symtree
->n
.sym
->attr
.artificial
= 1;
10110 symtree
->n
.sym
->attr
.codimension
= 1;
10111 symtree
->n
.sym
->ts
.type
= BT_DERIVED
;
10112 symtree
->n
.sym
->ts
.u
.derived
= lock_type
;
10113 symtree
->n
.sym
->as
= gfc_get_array_spec ();
10114 symtree
->n
.sym
->as
->corank
= 1;
10115 symtree
->n
.sym
->as
->type
= AS_EXPLICIT
;
10116 symtree
->n
.sym
->as
->cotype
= AS_EXPLICIT
;
10117 symtree
->n
.sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
,
10119 gfc_commit_symbols();
10124 resolve_sync (gfc_code
*code
)
10126 /* Check imageset. The * case matches expr1 == NULL. */
10129 if (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
> 1)
10130 gfc_error ("Imageset argument at %L must be a scalar or rank-1 "
10131 "INTEGER expression", &code
->expr1
->where
);
10132 if (code
->expr1
->expr_type
== EXPR_CONSTANT
&& code
->expr1
->rank
== 0
10133 && mpz_cmp_si (code
->expr1
->value
.integer
, 1) < 0)
10134 gfc_error ("Imageset argument at %L must between 1 and num_images()",
10135 &code
->expr1
->where
);
10136 else if (code
->expr1
->expr_type
== EXPR_ARRAY
10137 && gfc_simplify_expr (code
->expr1
, 0))
10139 gfc_constructor
*cons
;
10140 cons
= gfc_constructor_first (code
->expr1
->value
.constructor
);
10141 for (; cons
; cons
= gfc_constructor_next (cons
))
10142 if (cons
->expr
->expr_type
== EXPR_CONSTANT
10143 && mpz_cmp_si (cons
->expr
->value
.integer
, 1) < 0)
10144 gfc_error ("Imageset argument at %L must between 1 and "
10145 "num_images()", &cons
->expr
->where
);
10150 gfc_resolve_expr (code
->expr2
);
10152 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
10153 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
10154 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
10155 &code
->expr2
->where
);
10157 /* Check ERRMSG. */
10158 gfc_resolve_expr (code
->expr3
);
10160 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
10161 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
10162 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
10163 &code
->expr3
->where
);
10167 /* Given a branch to a label, see if the branch is conforming.
10168 The code node describes where the branch is located. */
10171 resolve_branch (gfc_st_label
*label
, gfc_code
*code
)
10178 /* Step one: is this a valid branching target? */
10180 if (label
->defined
== ST_LABEL_UNKNOWN
)
10182 gfc_error ("Label %d referenced at %L is never defined", label
->value
,
10187 if (label
->defined
!= ST_LABEL_TARGET
&& label
->defined
!= ST_LABEL_DO_TARGET
)
10189 gfc_error ("Statement at %L is not a valid branch target statement "
10190 "for the branch statement at %L", &label
->where
, &code
->loc
);
10194 /* Step two: make sure this branch is not a branch to itself ;-) */
10196 if (code
->here
== label
)
10199 "Branch at %L may result in an infinite loop", &code
->loc
);
10203 /* Step three: See if the label is in the same block as the
10204 branching statement. The hard work has been done by setting up
10205 the bitmap reachable_labels. */
10207 if (bitmap_bit_p (cs_base
->reachable_labels
, label
->value
))
10209 /* Check now whether there is a CRITICAL construct; if so, check
10210 whether the label is still visible outside of the CRITICAL block,
10211 which is invalid. */
10212 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
10214 if (stack
->current
->op
== EXEC_CRITICAL
10215 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
10216 gfc_error ("GOTO statement at %L leaves CRITICAL construct for "
10217 "label at %L", &code
->loc
, &label
->where
);
10218 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
10219 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
10220 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct "
10221 "for label at %L", &code
->loc
, &label
->where
);
10227 /* Step four: If we haven't found the label in the bitmap, it may
10228 still be the label of the END of the enclosing block, in which
10229 case we find it by going up the code_stack. */
10231 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
10233 if (stack
->current
->next
&& stack
->current
->next
->here
== label
)
10235 if (stack
->current
->op
== EXEC_CRITICAL
)
10237 /* Note: A label at END CRITICAL does not leave the CRITICAL
10238 construct as END CRITICAL is still part of it. */
10239 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
10240 " at %L", &code
->loc
, &label
->where
);
10243 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
)
10245 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct for "
10246 "label at %L", &code
->loc
, &label
->where
);
10253 gcc_assert (stack
->current
->next
->op
== EXEC_END_NESTED_BLOCK
);
10257 /* The label is not in an enclosing block, so illegal. This was
10258 allowed in Fortran 66, so we allow it as extension. No
10259 further checks are necessary in this case. */
10260 gfc_notify_std (GFC_STD_LEGACY
, "Label at %L is not in the same block "
10261 "as the GOTO statement at %L", &label
->where
,
10267 /* Check whether EXPR1 has the same shape as EXPR2. */
10270 resolve_where_shape (gfc_expr
*expr1
, gfc_expr
*expr2
)
10272 mpz_t shape
[GFC_MAX_DIMENSIONS
];
10273 mpz_t shape2
[GFC_MAX_DIMENSIONS
];
10274 bool result
= false;
10277 /* Compare the rank. */
10278 if (expr1
->rank
!= expr2
->rank
)
10281 /* Compare the size of each dimension. */
10282 for (i
=0; i
<expr1
->rank
; i
++)
10284 if (!gfc_array_dimen_size (expr1
, i
, &shape
[i
]))
10287 if (!gfc_array_dimen_size (expr2
, i
, &shape2
[i
]))
10290 if (mpz_cmp (shape
[i
], shape2
[i
]))
10294 /* When either of the two expression is an assumed size array, we
10295 ignore the comparison of dimension sizes. */
10300 gfc_clear_shape (shape
, i
);
10301 gfc_clear_shape (shape2
, i
);
10306 /* Check whether a WHERE assignment target or a WHERE mask expression
10307 has the same shape as the outmost WHERE mask expression. */
10310 resolve_where (gfc_code
*code
, gfc_expr
*mask
)
10314 gfc_expr
*e
= NULL
;
10316 cblock
= code
->block
;
10318 /* Store the first WHERE mask-expr of the WHERE statement or construct.
10319 In case of nested WHERE, only the outmost one is stored. */
10320 if (mask
== NULL
) /* outmost WHERE */
10322 else /* inner WHERE */
10329 /* Check if the mask-expr has a consistent shape with the
10330 outmost WHERE mask-expr. */
10331 if (!resolve_where_shape (cblock
->expr1
, e
))
10332 gfc_error ("WHERE mask at %L has inconsistent shape",
10333 &cblock
->expr1
->where
);
10336 /* the assignment statement of a WHERE statement, or the first
10337 statement in where-body-construct of a WHERE construct */
10338 cnext
= cblock
->next
;
10343 /* WHERE assignment statement */
10346 /* Check shape consistent for WHERE assignment target. */
10347 if (e
&& !resolve_where_shape (cnext
->expr1
, e
))
10348 gfc_error ("WHERE assignment target at %L has "
10349 "inconsistent shape", &cnext
->expr1
->where
);
10353 case EXEC_ASSIGN_CALL
:
10354 resolve_call (cnext
);
10355 if (!cnext
->resolved_sym
->attr
.elemental
)
10356 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
10357 &cnext
->ext
.actual
->expr
->where
);
10360 /* WHERE or WHERE construct is part of a where-body-construct */
10362 resolve_where (cnext
, e
);
10366 gfc_error ("Unsupported statement inside WHERE at %L",
10369 /* the next statement within the same where-body-construct */
10370 cnext
= cnext
->next
;
10372 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
10373 cblock
= cblock
->block
;
10378 /* Resolve assignment in FORALL construct.
10379 NVAR is the number of FORALL index variables, and VAR_EXPR records the
10380 FORALL index variables. */
10383 gfc_resolve_assign_in_forall (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
10387 for (n
= 0; n
< nvar
; n
++)
10389 gfc_symbol
*forall_index
;
10391 forall_index
= var_expr
[n
]->symtree
->n
.sym
;
10393 /* Check whether the assignment target is one of the FORALL index
10395 if ((code
->expr1
->expr_type
== EXPR_VARIABLE
)
10396 && (code
->expr1
->symtree
->n
.sym
== forall_index
))
10397 gfc_error ("Assignment to a FORALL index variable at %L",
10398 &code
->expr1
->where
);
10401 /* If one of the FORALL index variables doesn't appear in the
10402 assignment variable, then there could be a many-to-one
10403 assignment. Emit a warning rather than an error because the
10404 mask could be resolving this problem. */
10405 if (!find_forall_index (code
->expr1
, forall_index
, 0))
10406 gfc_warning (0, "The FORALL with index %qs is not used on the "
10407 "left side of the assignment at %L and so might "
10408 "cause multiple assignment to this object",
10409 var_expr
[n
]->symtree
->name
, &code
->expr1
->where
);
10415 /* Resolve WHERE statement in FORALL construct. */
10418 gfc_resolve_where_code_in_forall (gfc_code
*code
, int nvar
,
10419 gfc_expr
**var_expr
)
10424 cblock
= code
->block
;
10427 /* the assignment statement of a WHERE statement, or the first
10428 statement in where-body-construct of a WHERE construct */
10429 cnext
= cblock
->next
;
10434 /* WHERE assignment statement */
10436 gfc_resolve_assign_in_forall (cnext
, nvar
, var_expr
);
10439 /* WHERE operator assignment statement */
10440 case EXEC_ASSIGN_CALL
:
10441 resolve_call (cnext
);
10442 if (!cnext
->resolved_sym
->attr
.elemental
)
10443 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
10444 &cnext
->ext
.actual
->expr
->where
);
10447 /* WHERE or WHERE construct is part of a where-body-construct */
10449 gfc_resolve_where_code_in_forall (cnext
, nvar
, var_expr
);
10453 gfc_error ("Unsupported statement inside WHERE at %L",
10456 /* the next statement within the same where-body-construct */
10457 cnext
= cnext
->next
;
10459 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
10460 cblock
= cblock
->block
;
10465 /* Traverse the FORALL body to check whether the following errors exist:
10466 1. For assignment, check if a many-to-one assignment happens.
10467 2. For WHERE statement, check the WHERE body to see if there is any
10468 many-to-one assignment. */
10471 gfc_resolve_forall_body (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
10475 c
= code
->block
->next
;
10481 case EXEC_POINTER_ASSIGN
:
10482 gfc_resolve_assign_in_forall (c
, nvar
, var_expr
);
10485 case EXEC_ASSIGN_CALL
:
10489 /* Because the gfc_resolve_blocks() will handle the nested FORALL,
10490 there is no need to handle it here. */
10494 gfc_resolve_where_code_in_forall(c
, nvar
, var_expr
);
10499 /* The next statement in the FORALL body. */
10505 /* Counts the number of iterators needed inside a forall construct, including
10506 nested forall constructs. This is used to allocate the needed memory
10507 in gfc_resolve_forall. */
10510 gfc_count_forall_iterators (gfc_code
*code
)
10512 int max_iters
, sub_iters
, current_iters
;
10513 gfc_forall_iterator
*fa
;
10515 gcc_assert(code
->op
== EXEC_FORALL
);
10519 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10522 code
= code
->block
->next
;
10526 if (code
->op
== EXEC_FORALL
)
10528 sub_iters
= gfc_count_forall_iterators (code
);
10529 if (sub_iters
> max_iters
)
10530 max_iters
= sub_iters
;
10535 return current_iters
+ max_iters
;
10539 /* Given a FORALL construct, first resolve the FORALL iterator, then call
10540 gfc_resolve_forall_body to resolve the FORALL body. */
10543 gfc_resolve_forall (gfc_code
*code
, gfc_namespace
*ns
, int forall_save
)
10545 static gfc_expr
**var_expr
;
10546 static int total_var
= 0;
10547 static int nvar
= 0;
10548 int i
, old_nvar
, tmp
;
10549 gfc_forall_iterator
*fa
;
10553 if (!gfc_notify_std (GFC_STD_F2018_OBS
, "FORALL construct at %L", &code
->loc
))
10556 /* Start to resolve a FORALL construct */
10557 if (forall_save
== 0)
10559 /* Count the total number of FORALL indices in the nested FORALL
10560 construct in order to allocate the VAR_EXPR with proper size. */
10561 total_var
= gfc_count_forall_iterators (code
);
10563 /* Allocate VAR_EXPR with NUMBER_OF_FORALL_INDEX elements. */
10564 var_expr
= XCNEWVEC (gfc_expr
*, total_var
);
10567 /* The information about FORALL iterator, including FORALL indices start, end
10568 and stride. An outer FORALL indice cannot appear in start, end or stride. */
10569 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10571 /* Fortran 20008: C738 (R753). */
10572 if (fa
->var
->ref
&& fa
->var
->ref
->type
== REF_ARRAY
)
10574 gfc_error ("FORALL index-name at %L must be a scalar variable "
10575 "of type integer", &fa
->var
->where
);
10579 /* Check if any outer FORALL index name is the same as the current
10581 for (i
= 0; i
< nvar
; i
++)
10583 if (fa
->var
->symtree
->n
.sym
== var_expr
[i
]->symtree
->n
.sym
)
10584 gfc_error ("An outer FORALL construct already has an index "
10585 "with this name %L", &fa
->var
->where
);
10588 /* Record the current FORALL index. */
10589 var_expr
[nvar
] = gfc_copy_expr (fa
->var
);
10593 /* No memory leak. */
10594 gcc_assert (nvar
<= total_var
);
10597 /* Resolve the FORALL body. */
10598 gfc_resolve_forall_body (code
, nvar
, var_expr
);
10600 /* May call gfc_resolve_forall to resolve the inner FORALL loop. */
10601 gfc_resolve_blocks (code
->block
, ns
);
10605 /* Free only the VAR_EXPRs allocated in this frame. */
10606 for (i
= nvar
; i
< tmp
; i
++)
10607 gfc_free_expr (var_expr
[i
]);
10611 /* We are in the outermost FORALL construct. */
10612 gcc_assert (forall_save
== 0);
10614 /* VAR_EXPR is not needed any more. */
10621 /* Resolve a BLOCK construct statement. */
10624 resolve_block_construct (gfc_code
* code
)
10626 /* Resolve the BLOCK's namespace. */
10627 gfc_resolve (code
->ext
.block
.ns
);
10629 /* For an ASSOCIATE block, the associations (and their targets) are already
10630 resolved during resolve_symbol. */
10634 /* Resolve lists of blocks found in IF, SELECT CASE, WHERE, FORALL, GOTO and
10638 gfc_resolve_blocks (gfc_code
*b
, gfc_namespace
*ns
)
10642 for (; b
; b
= b
->block
)
10644 t
= gfc_resolve_expr (b
->expr1
);
10645 if (!gfc_resolve_expr (b
->expr2
))
10651 if (t
&& b
->expr1
!= NULL
10652 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
!= 0))
10653 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
10659 && b
->expr1
!= NULL
10660 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
== 0))
10661 gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
10666 resolve_branch (b
->label1
, b
);
10670 resolve_block_construct (b
);
10674 case EXEC_SELECT_TYPE
:
10675 case EXEC_SELECT_RANK
:
10678 case EXEC_DO_WHILE
:
10679 case EXEC_DO_CONCURRENT
:
10680 case EXEC_CRITICAL
:
10683 case EXEC_IOLENGTH
:
10687 case EXEC_OMP_ATOMIC
:
10688 case EXEC_OACC_ATOMIC
:
10690 gfc_omp_atomic_op aop
10691 = (gfc_omp_atomic_op
) (b
->ext
.omp_atomic
& GFC_OMP_ATOMIC_MASK
);
10693 /* Verify this before calling gfc_resolve_code, which might
10695 gcc_assert (b
->next
&& b
->next
->op
== EXEC_ASSIGN
);
10696 gcc_assert (((aop
!= GFC_OMP_ATOMIC_CAPTURE
)
10697 && b
->next
->next
== NULL
)
10698 || ((aop
== GFC_OMP_ATOMIC_CAPTURE
)
10699 && b
->next
->next
!= NULL
10700 && b
->next
->next
->op
== EXEC_ASSIGN
10701 && b
->next
->next
->next
== NULL
));
10705 case EXEC_OACC_PARALLEL_LOOP
:
10706 case EXEC_OACC_PARALLEL
:
10707 case EXEC_OACC_KERNELS_LOOP
:
10708 case EXEC_OACC_KERNELS
:
10709 case EXEC_OACC_SERIAL_LOOP
:
10710 case EXEC_OACC_SERIAL
:
10711 case EXEC_OACC_DATA
:
10712 case EXEC_OACC_HOST_DATA
:
10713 case EXEC_OACC_LOOP
:
10714 case EXEC_OACC_UPDATE
:
10715 case EXEC_OACC_WAIT
:
10716 case EXEC_OACC_CACHE
:
10717 case EXEC_OACC_ENTER_DATA
:
10718 case EXEC_OACC_EXIT_DATA
:
10719 case EXEC_OACC_ROUTINE
:
10720 case EXEC_OMP_CRITICAL
:
10721 case EXEC_OMP_DISTRIBUTE
:
10722 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
10723 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
10724 case EXEC_OMP_DISTRIBUTE_SIMD
:
10726 case EXEC_OMP_DO_SIMD
:
10727 case EXEC_OMP_MASTER
:
10728 case EXEC_OMP_ORDERED
:
10729 case EXEC_OMP_PARALLEL
:
10730 case EXEC_OMP_PARALLEL_DO
:
10731 case EXEC_OMP_PARALLEL_DO_SIMD
:
10732 case EXEC_OMP_PARALLEL_SECTIONS
:
10733 case EXEC_OMP_PARALLEL_WORKSHARE
:
10734 case EXEC_OMP_SECTIONS
:
10735 case EXEC_OMP_SIMD
:
10736 case EXEC_OMP_SINGLE
:
10737 case EXEC_OMP_TARGET
:
10738 case EXEC_OMP_TARGET_DATA
:
10739 case EXEC_OMP_TARGET_ENTER_DATA
:
10740 case EXEC_OMP_TARGET_EXIT_DATA
:
10741 case EXEC_OMP_TARGET_PARALLEL
:
10742 case EXEC_OMP_TARGET_PARALLEL_DO
:
10743 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
10744 case EXEC_OMP_TARGET_SIMD
:
10745 case EXEC_OMP_TARGET_TEAMS
:
10746 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
10747 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10748 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10749 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
10750 case EXEC_OMP_TARGET_UPDATE
:
10751 case EXEC_OMP_TASK
:
10752 case EXEC_OMP_TASKGROUP
:
10753 case EXEC_OMP_TASKLOOP
:
10754 case EXEC_OMP_TASKLOOP_SIMD
:
10755 case EXEC_OMP_TASKWAIT
:
10756 case EXEC_OMP_TASKYIELD
:
10757 case EXEC_OMP_TEAMS
:
10758 case EXEC_OMP_TEAMS_DISTRIBUTE
:
10759 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10760 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10761 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
10762 case EXEC_OMP_WORKSHARE
:
10766 gfc_internal_error ("gfc_resolve_blocks(): Bad block type");
10769 gfc_resolve_code (b
->next
, ns
);
10774 /* Does everything to resolve an ordinary assignment. Returns true
10775 if this is an interface assignment. */
10777 resolve_ordinary_assign (gfc_code
*code
, gfc_namespace
*ns
)
10784 symbol_attribute attr
;
10786 if (gfc_extend_assign (code
, ns
))
10790 if (code
->op
== EXEC_ASSIGN_CALL
)
10792 lhs
= code
->ext
.actual
->expr
;
10793 rhsptr
= &code
->ext
.actual
->next
->expr
;
10797 gfc_actual_arglist
* args
;
10798 gfc_typebound_proc
* tbp
;
10800 gcc_assert (code
->op
== EXEC_COMPCALL
);
10802 args
= code
->expr1
->value
.compcall
.actual
;
10804 rhsptr
= &args
->next
->expr
;
10806 tbp
= code
->expr1
->value
.compcall
.tbp
;
10807 gcc_assert (!tbp
->is_generic
);
10810 /* Make a temporary rhs when there is a default initializer
10811 and rhs is the same symbol as the lhs. */
10812 if ((*rhsptr
)->expr_type
== EXPR_VARIABLE
10813 && (*rhsptr
)->symtree
->n
.sym
->ts
.type
== BT_DERIVED
10814 && gfc_has_default_initializer ((*rhsptr
)->symtree
->n
.sym
->ts
.u
.derived
)
10815 && (lhs
->symtree
->n
.sym
== (*rhsptr
)->symtree
->n
.sym
))
10816 *rhsptr
= gfc_get_parentheses (*rhsptr
);
10824 if ((gfc_numeric_ts (&lhs
->ts
) || lhs
->ts
.type
== BT_LOGICAL
)
10825 && rhs
->ts
.type
== BT_CHARACTER
10826 && (rhs
->expr_type
!= EXPR_CONSTANT
|| !flag_dec_char_conversions
))
10828 /* Use of -fdec-char-conversions allows assignment of character data
10829 to non-character variables. This not permited for nonconstant
10831 gfc_error ("Cannot convert %s to %s at %L", gfc_typename (rhs
),
10832 gfc_typename (lhs
), &rhs
->where
);
10836 /* Handle the case of a BOZ literal on the RHS. */
10837 if (rhs
->ts
.type
== BT_BOZ
)
10839 if (gfc_invalid_boz ("BOZ literal constant at %L is neither a DATA "
10840 "statement value nor an actual argument of "
10841 "INT/REAL/DBLE/CMPLX intrinsic subprogram",
10845 switch (lhs
->ts
.type
)
10848 if (!gfc_boz2int (rhs
, lhs
->ts
.kind
))
10852 if (!gfc_boz2real (rhs
, lhs
->ts
.kind
))
10856 gfc_error ("Invalid use of BOZ literal constant at %L", &rhs
->where
);
10861 if (lhs
->ts
.type
== BT_CHARACTER
&& warn_character_truncation
)
10863 HOST_WIDE_INT llen
= 0, rlen
= 0;
10864 if (lhs
->ts
.u
.cl
!= NULL
10865 && lhs
->ts
.u
.cl
->length
!= NULL
10866 && lhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10867 llen
= gfc_mpz_get_hwi (lhs
->ts
.u
.cl
->length
->value
.integer
);
10869 if (rhs
->expr_type
== EXPR_CONSTANT
)
10870 rlen
= rhs
->value
.character
.length
;
10872 else if (rhs
->ts
.u
.cl
!= NULL
10873 && rhs
->ts
.u
.cl
->length
!= NULL
10874 && rhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10875 rlen
= gfc_mpz_get_hwi (rhs
->ts
.u
.cl
->length
->value
.integer
);
10877 if (rlen
&& llen
&& rlen
> llen
)
10878 gfc_warning_now (OPT_Wcharacter_truncation
,
10879 "CHARACTER expression will be truncated "
10880 "in assignment (%ld/%ld) at %L",
10881 (long) llen
, (long) rlen
, &code
->loc
);
10884 /* Ensure that a vector index expression for the lvalue is evaluated
10885 to a temporary if the lvalue symbol is referenced in it. */
10888 for (ref
= lhs
->ref
; ref
; ref
= ref
->next
)
10889 if (ref
->type
== REF_ARRAY
)
10891 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
10892 if (ref
->u
.ar
.dimen_type
[n
] == DIMEN_VECTOR
10893 && gfc_find_sym_in_expr (lhs
->symtree
->n
.sym
,
10894 ref
->u
.ar
.start
[n
]))
10896 = gfc_get_parentheses (ref
->u
.ar
.start
[n
]);
10900 if (gfc_pure (NULL
))
10902 if (lhs
->ts
.type
== BT_DERIVED
10903 && lhs
->expr_type
== EXPR_VARIABLE
10904 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10905 && rhs
->expr_type
== EXPR_VARIABLE
10906 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10907 || gfc_is_coindexed (rhs
)))
10909 /* F2008, C1283. */
10910 if (gfc_is_coindexed (rhs
))
10911 gfc_error ("Coindexed expression at %L is assigned to "
10912 "a derived type variable with a POINTER "
10913 "component in a PURE procedure",
10916 /* F2008, C1283 (4). */
10917 gfc_error ("In a pure subprogram an INTENT(IN) dummy argument "
10918 "shall not be used as the expr at %L of an intrinsic "
10919 "assignment statement in which the variable is of a "
10920 "derived type if the derived type has a pointer "
10921 "component at any level of component selection.",
10926 /* Fortran 2008, C1283. */
10927 if (gfc_is_coindexed (lhs
))
10929 gfc_error ("Assignment to coindexed variable at %L in a PURE "
10930 "procedure", &rhs
->where
);
10935 if (gfc_implicit_pure (NULL
))
10937 if (lhs
->expr_type
== EXPR_VARIABLE
10938 && lhs
->symtree
->n
.sym
!= gfc_current_ns
->proc_name
10939 && lhs
->symtree
->n
.sym
->ns
!= gfc_current_ns
)
10940 gfc_unset_implicit_pure (NULL
);
10942 if (lhs
->ts
.type
== BT_DERIVED
10943 && lhs
->expr_type
== EXPR_VARIABLE
10944 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10945 && rhs
->expr_type
== EXPR_VARIABLE
10946 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10947 || gfc_is_coindexed (rhs
)))
10948 gfc_unset_implicit_pure (NULL
);
10950 /* Fortran 2008, C1283. */
10951 if (gfc_is_coindexed (lhs
))
10952 gfc_unset_implicit_pure (NULL
);
10955 /* F2008, 7.2.1.2. */
10956 attr
= gfc_expr_attr (lhs
);
10957 if (lhs
->ts
.type
== BT_CLASS
&& attr
.allocatable
)
10959 if (attr
.codimension
)
10961 gfc_error ("Assignment to polymorphic coarray at %L is not "
10962 "permitted", &lhs
->where
);
10965 if (!gfc_notify_std (GFC_STD_F2008
, "Assignment to an allocatable "
10966 "polymorphic variable at %L", &lhs
->where
))
10968 if (!flag_realloc_lhs
)
10970 gfc_error ("Assignment to an allocatable polymorphic variable at %L "
10971 "requires %<-frealloc-lhs%>", &lhs
->where
);
10975 else if (lhs
->ts
.type
== BT_CLASS
)
10977 gfc_error ("Nonallocatable variable must not be polymorphic in intrinsic "
10978 "assignment at %L - check that there is a matching specific "
10979 "subroutine for '=' operator", &lhs
->where
);
10983 bool lhs_coindexed
= gfc_is_coindexed (lhs
);
10985 /* F2008, Section 7.2.1.2. */
10986 if (lhs_coindexed
&& gfc_has_ultimate_allocatable (lhs
))
10988 gfc_error ("Coindexed variable must not have an allocatable ultimate "
10989 "component in assignment at %L", &lhs
->where
);
10993 /* Assign the 'data' of a class object to a derived type. */
10994 if (lhs
->ts
.type
== BT_DERIVED
10995 && rhs
->ts
.type
== BT_CLASS
10996 && rhs
->expr_type
!= EXPR_ARRAY
)
10997 gfc_add_data_component (rhs
);
10999 /* Make sure there is a vtable and, in particular, a _copy for the
11001 if (UNLIMITED_POLY (lhs
) && lhs
->rank
&& rhs
->ts
.type
!= BT_CLASS
)
11002 gfc_find_vtab (&rhs
->ts
);
11004 bool caf_convert_to_send
= flag_coarray
== GFC_FCOARRAY_LIB
11006 || (code
->expr2
->expr_type
== EXPR_FUNCTION
11007 && code
->expr2
->value
.function
.isym
11008 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
11009 && (code
->expr1
->rank
== 0 || code
->expr2
->rank
!= 0)
11010 && !gfc_expr_attr (rhs
).allocatable
11011 && !gfc_has_vector_subscript (rhs
)));
11013 gfc_check_assign (lhs
, rhs
, 1, !caf_convert_to_send
);
11015 /* Insert a GFC_ISYM_CAF_SEND intrinsic, when the LHS is a coindexed variable.
11016 Additionally, insert this code when the RHS is a CAF as we then use the
11017 GFC_ISYM_CAF_SEND intrinsic just to avoid a temporary; but do not do so if
11018 the LHS is (re)allocatable or has a vector subscript. If the LHS is a
11019 noncoindexed array and the RHS is a coindexed scalar, use the normal code
11021 if (caf_convert_to_send
)
11023 if (code
->expr2
->expr_type
== EXPR_FUNCTION
11024 && code
->expr2
->value
.function
.isym
11025 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
11026 remove_caf_get_intrinsic (code
->expr2
);
11027 code
->op
= EXEC_CALL
;
11028 gfc_get_sym_tree (GFC_PREFIX ("caf_send"), ns
, &code
->symtree
, true);
11029 code
->resolved_sym
= code
->symtree
->n
.sym
;
11030 code
->resolved_sym
->attr
.flavor
= FL_PROCEDURE
;
11031 code
->resolved_sym
->attr
.intrinsic
= 1;
11032 code
->resolved_sym
->attr
.subroutine
= 1;
11033 code
->resolved_isym
= gfc_intrinsic_subroutine_by_id (GFC_ISYM_CAF_SEND
);
11034 gfc_commit_symbol (code
->resolved_sym
);
11035 code
->ext
.actual
= gfc_get_actual_arglist ();
11036 code
->ext
.actual
->expr
= lhs
;
11037 code
->ext
.actual
->next
= gfc_get_actual_arglist ();
11038 code
->ext
.actual
->next
->expr
= rhs
;
11039 code
->expr1
= NULL
;
11040 code
->expr2
= NULL
;
11047 /* Add a component reference onto an expression. */
11050 add_comp_ref (gfc_expr
*e
, gfc_component
*c
)
11055 ref
= &((*ref
)->next
);
11056 *ref
= gfc_get_ref ();
11057 (*ref
)->type
= REF_COMPONENT
;
11058 (*ref
)->u
.c
.sym
= e
->ts
.u
.derived
;
11059 (*ref
)->u
.c
.component
= c
;
11062 /* Add a full array ref, as necessary. */
11065 gfc_add_full_array_ref (e
, c
->as
);
11066 e
->rank
= c
->as
->rank
;
11071 /* Build an assignment. Keep the argument 'op' for future use, so that
11072 pointer assignments can be made. */
11075 build_assignment (gfc_exec_op op
, gfc_expr
*expr1
, gfc_expr
*expr2
,
11076 gfc_component
*comp1
, gfc_component
*comp2
, locus loc
)
11078 gfc_code
*this_code
;
11080 this_code
= gfc_get_code (op
);
11081 this_code
->next
= NULL
;
11082 this_code
->expr1
= gfc_copy_expr (expr1
);
11083 this_code
->expr2
= gfc_copy_expr (expr2
);
11084 this_code
->loc
= loc
;
11085 if (comp1
&& comp2
)
11087 add_comp_ref (this_code
->expr1
, comp1
);
11088 add_comp_ref (this_code
->expr2
, comp2
);
11095 /* Makes a temporary variable expression based on the characteristics of
11096 a given variable expression. */
11099 get_temp_from_expr (gfc_expr
*e
, gfc_namespace
*ns
)
11101 static int serial
= 0;
11102 char name
[GFC_MAX_SYMBOL_LEN
];
11104 gfc_array_spec
*as
;
11105 gfc_array_ref
*aref
;
11108 sprintf (name
, GFC_PREFIX("DA%d"), serial
++);
11109 gfc_get_sym_tree (name
, ns
, &tmp
, false);
11110 gfc_add_type (tmp
->n
.sym
, &e
->ts
, NULL
);
11112 if (e
->expr_type
== EXPR_CONSTANT
&& e
->ts
.type
== BT_CHARACTER
)
11113 tmp
->n
.sym
->ts
.u
.cl
->length
= gfc_get_int_expr (gfc_charlen_int_kind
,
11115 e
->value
.character
.length
);
11121 /* Obtain the arrayspec for the temporary. */
11122 if (e
->rank
&& e
->expr_type
!= EXPR_ARRAY
11123 && e
->expr_type
!= EXPR_FUNCTION
11124 && e
->expr_type
!= EXPR_OP
)
11126 aref
= gfc_find_array_ref (e
);
11127 if (e
->expr_type
== EXPR_VARIABLE
11128 && e
->symtree
->n
.sym
->as
== aref
->as
)
11132 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
11133 if (ref
->type
== REF_COMPONENT
11134 && ref
->u
.c
.component
->as
== aref
->as
)
11142 /* Add the attributes and the arrayspec to the temporary. */
11143 tmp
->n
.sym
->attr
= gfc_expr_attr (e
);
11144 tmp
->n
.sym
->attr
.function
= 0;
11145 tmp
->n
.sym
->attr
.result
= 0;
11146 tmp
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
11147 tmp
->n
.sym
->attr
.dummy
= 0;
11148 tmp
->n
.sym
->attr
.intent
= INTENT_UNKNOWN
;
11152 tmp
->n
.sym
->as
= gfc_copy_array_spec (as
);
11155 if (as
->type
== AS_DEFERRED
)
11156 tmp
->n
.sym
->attr
.allocatable
= 1;
11158 else if (e
->rank
&& (e
->expr_type
== EXPR_ARRAY
11159 || e
->expr_type
== EXPR_FUNCTION
11160 || e
->expr_type
== EXPR_OP
))
11162 tmp
->n
.sym
->as
= gfc_get_array_spec ();
11163 tmp
->n
.sym
->as
->type
= AS_DEFERRED
;
11164 tmp
->n
.sym
->as
->rank
= e
->rank
;
11165 tmp
->n
.sym
->attr
.allocatable
= 1;
11166 tmp
->n
.sym
->attr
.dimension
= 1;
11169 tmp
->n
.sym
->attr
.dimension
= 0;
11171 gfc_set_sym_referenced (tmp
->n
.sym
);
11172 gfc_commit_symbol (tmp
->n
.sym
);
11173 e
= gfc_lval_expr_from_sym (tmp
->n
.sym
);
11175 /* Should the lhs be a section, use its array ref for the
11176 temporary expression. */
11177 if (aref
&& aref
->type
!= AR_FULL
)
11179 gfc_free_ref_list (e
->ref
);
11180 e
->ref
= gfc_copy_ref (ref
);
11186 /* Add one line of code to the code chain, making sure that 'head' and
11187 'tail' are appropriately updated. */
11190 add_code_to_chain (gfc_code
**this_code
, gfc_code
**head
, gfc_code
**tail
)
11192 gcc_assert (this_code
);
11194 *head
= *tail
= *this_code
;
11196 *tail
= gfc_append_code (*tail
, *this_code
);
11201 /* Counts the potential number of part array references that would
11202 result from resolution of typebound defined assignments. */
11205 nonscalar_typebound_assign (gfc_symbol
*derived
, int depth
)
11208 int c_depth
= 0, t_depth
;
11210 for (c
= derived
->components
; c
; c
= c
->next
)
11212 if ((!gfc_bt_struct (c
->ts
.type
)
11214 || c
->attr
.allocatable
11215 || c
->attr
.proc_pointer_comp
11216 || c
->attr
.class_pointer
11217 || c
->attr
.proc_pointer
)
11218 && !c
->attr
.defined_assign_comp
)
11221 if (c
->as
&& c_depth
== 0)
11224 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
11225 t_depth
= nonscalar_typebound_assign (c
->ts
.u
.derived
,
11230 c_depth
= t_depth
> c_depth
? t_depth
: c_depth
;
11232 return depth
+ c_depth
;
11236 /* Implement 7.2.1.3 of the F08 standard:
11237 "An intrinsic assignment where the variable is of derived type is
11238 performed as if each component of the variable were assigned from the
11239 corresponding component of expr using pointer assignment (7.2.2) for
11240 each pointer component, defined assignment for each nonpointer
11241 nonallocatable component of a type that has a type-bound defined
11242 assignment consistent with the component, intrinsic assignment for
11243 each other nonpointer nonallocatable component, ..."
11245 The pointer assignments are taken care of by the intrinsic
11246 assignment of the structure itself. This function recursively adds
11247 defined assignments where required. The recursion is accomplished
11248 by calling gfc_resolve_code.
11250 When the lhs in a defined assignment has intent INOUT, we need a
11251 temporary for the lhs. In pseudo-code:
11253 ! Only call function lhs once.
11254 if (lhs is not a constant or an variable)
11257 ! Do the intrinsic assignment
11259 ! Now do the defined assignments
11260 do over components with typebound defined assignment [%cmp]
11261 #if one component's assignment procedure is INOUT
11263 #if expr2 non-variable
11269 t1%cmp {defined=} expr2%cmp
11275 expr1%cmp {defined=} expr2%cmp
11279 /* The temporary assignments have to be put on top of the additional
11280 code to avoid the result being changed by the intrinsic assignment.
11282 static int component_assignment_level
= 0;
11283 static gfc_code
*tmp_head
= NULL
, *tmp_tail
= NULL
;
11286 generate_component_assignments (gfc_code
**code
, gfc_namespace
*ns
)
11288 gfc_component
*comp1
, *comp2
;
11289 gfc_code
*this_code
= NULL
, *head
= NULL
, *tail
= NULL
;
11291 int error_count
, depth
;
11293 gfc_get_errors (NULL
, &error_count
);
11295 /* Filter out continuing processing after an error. */
11297 || (*code
)->expr1
->ts
.type
!= BT_DERIVED
11298 || (*code
)->expr2
->ts
.type
!= BT_DERIVED
)
11301 /* TODO: Handle more than one part array reference in assignments. */
11302 depth
= nonscalar_typebound_assign ((*code
)->expr1
->ts
.u
.derived
,
11303 (*code
)->expr1
->rank
? 1 : 0);
11306 gfc_warning (0, "TODO: type-bound defined assignment(s) at %L not "
11307 "done because multiple part array references would "
11308 "occur in intermediate expressions.", &(*code
)->loc
);
11312 component_assignment_level
++;
11314 /* Create a temporary so that functions get called only once. */
11315 if ((*code
)->expr2
->expr_type
!= EXPR_VARIABLE
11316 && (*code
)->expr2
->expr_type
!= EXPR_CONSTANT
)
11318 gfc_expr
*tmp_expr
;
11320 /* Assign the rhs to the temporary. */
11321 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11322 this_code
= build_assignment (EXEC_ASSIGN
,
11323 tmp_expr
, (*code
)->expr2
,
11324 NULL
, NULL
, (*code
)->loc
);
11325 /* Add the code and substitute the rhs expression. */
11326 add_code_to_chain (&this_code
, &tmp_head
, &tmp_tail
);
11327 gfc_free_expr ((*code
)->expr2
);
11328 (*code
)->expr2
= tmp_expr
;
11331 /* Do the intrinsic assignment. This is not needed if the lhs is one
11332 of the temporaries generated here, since the intrinsic assignment
11333 to the final result already does this. */
11334 if ((*code
)->expr1
->symtree
->n
.sym
->name
[2] != '@')
11336 this_code
= build_assignment (EXEC_ASSIGN
,
11337 (*code
)->expr1
, (*code
)->expr2
,
11338 NULL
, NULL
, (*code
)->loc
);
11339 add_code_to_chain (&this_code
, &head
, &tail
);
11342 comp1
= (*code
)->expr1
->ts
.u
.derived
->components
;
11343 comp2
= (*code
)->expr2
->ts
.u
.derived
->components
;
11346 for (; comp1
; comp1
= comp1
->next
, comp2
= comp2
->next
)
11348 bool inout
= false;
11350 /* The intrinsic assignment does the right thing for pointers
11351 of all kinds and allocatable components. */
11352 if (!gfc_bt_struct (comp1
->ts
.type
)
11353 || comp1
->attr
.pointer
11354 || comp1
->attr
.allocatable
11355 || comp1
->attr
.proc_pointer_comp
11356 || comp1
->attr
.class_pointer
11357 || comp1
->attr
.proc_pointer
)
11360 /* Make an assigment for this component. */
11361 this_code
= build_assignment (EXEC_ASSIGN
,
11362 (*code
)->expr1
, (*code
)->expr2
,
11363 comp1
, comp2
, (*code
)->loc
);
11365 /* Convert the assignment if there is a defined assignment for
11366 this type. Otherwise, using the call from gfc_resolve_code,
11367 recurse into its components. */
11368 gfc_resolve_code (this_code
, ns
);
11370 if (this_code
->op
== EXEC_ASSIGN_CALL
)
11372 gfc_formal_arglist
*dummy_args
;
11374 /* Check that there is a typebound defined assignment. If not,
11375 then this must be a module defined assignment. We cannot
11376 use the defined_assign_comp attribute here because it must
11377 be this derived type that has the defined assignment and not
11379 if (!(comp1
->ts
.u
.derived
->f2k_derived
11380 && comp1
->ts
.u
.derived
->f2k_derived
11381 ->tb_op
[INTRINSIC_ASSIGN
]))
11383 gfc_free_statements (this_code
);
11388 /* If the first argument of the subroutine has intent INOUT
11389 a temporary must be generated and used instead. */
11390 rsym
= this_code
->resolved_sym
;
11391 dummy_args
= gfc_sym_get_dummy_args (rsym
);
11393 && dummy_args
->sym
->attr
.intent
== INTENT_INOUT
)
11395 gfc_code
*temp_code
;
11398 /* Build the temporary required for the assignment and put
11399 it at the head of the generated code. */
11402 t1
= get_temp_from_expr ((*code
)->expr1
, ns
);
11403 temp_code
= build_assignment (EXEC_ASSIGN
,
11404 t1
, (*code
)->expr1
,
11405 NULL
, NULL
, (*code
)->loc
);
11407 /* For allocatable LHS, check whether it is allocated. Note
11408 that allocatable components with defined assignment are
11409 not yet support. See PR 57696. */
11410 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
)
11414 gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11415 block
= gfc_get_code (EXEC_IF
);
11416 block
->block
= gfc_get_code (EXEC_IF
);
11417 block
->block
->expr1
11418 = gfc_build_intrinsic_call (ns
,
11419 GFC_ISYM_ALLOCATED
, "allocated",
11420 (*code
)->loc
, 1, e
);
11421 block
->block
->next
= temp_code
;
11424 add_code_to_chain (&temp_code
, &tmp_head
, &tmp_tail
);
11427 /* Replace the first actual arg with the component of the
11429 gfc_free_expr (this_code
->ext
.actual
->expr
);
11430 this_code
->ext
.actual
->expr
= gfc_copy_expr (t1
);
11431 add_comp_ref (this_code
->ext
.actual
->expr
, comp1
);
11433 /* If the LHS variable is allocatable and wasn't allocated and
11434 the temporary is allocatable, pointer assign the address of
11435 the freshly allocated LHS to the temporary. */
11436 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
11437 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11442 cond
= gfc_get_expr ();
11443 cond
->ts
.type
= BT_LOGICAL
;
11444 cond
->ts
.kind
= gfc_default_logical_kind
;
11445 cond
->expr_type
= EXPR_OP
;
11446 cond
->where
= (*code
)->loc
;
11447 cond
->value
.op
.op
= INTRINSIC_NOT
;
11448 cond
->value
.op
.op1
= gfc_build_intrinsic_call (ns
,
11449 GFC_ISYM_ALLOCATED
, "allocated",
11450 (*code
)->loc
, 1, gfc_copy_expr (t1
));
11451 block
= gfc_get_code (EXEC_IF
);
11452 block
->block
= gfc_get_code (EXEC_IF
);
11453 block
->block
->expr1
= cond
;
11454 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11455 t1
, (*code
)->expr1
,
11456 NULL
, NULL
, (*code
)->loc
);
11457 add_code_to_chain (&block
, &head
, &tail
);
11461 else if (this_code
->op
== EXEC_ASSIGN
&& !this_code
->next
)
11463 /* Don't add intrinsic assignments since they are already
11464 effected by the intrinsic assignment of the structure. */
11465 gfc_free_statements (this_code
);
11470 add_code_to_chain (&this_code
, &head
, &tail
);
11474 /* Transfer the value to the final result. */
11475 this_code
= build_assignment (EXEC_ASSIGN
,
11476 (*code
)->expr1
, t1
,
11477 comp1
, comp2
, (*code
)->loc
);
11478 add_code_to_chain (&this_code
, &head
, &tail
);
11482 /* Put the temporary assignments at the top of the generated code. */
11483 if (tmp_head
&& component_assignment_level
== 1)
11485 gfc_append_code (tmp_head
, head
);
11487 tmp_head
= tmp_tail
= NULL
;
11490 // If we did a pointer assignment - thus, we need to ensure that the LHS is
11491 // not accidentally deallocated. Hence, nullify t1.
11492 if (t1
&& (*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
11493 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11499 e
= gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11500 cond
= gfc_build_intrinsic_call (ns
, GFC_ISYM_ASSOCIATED
, "associated",
11501 (*code
)->loc
, 2, gfc_copy_expr (t1
), e
);
11502 block
= gfc_get_code (EXEC_IF
);
11503 block
->block
= gfc_get_code (EXEC_IF
);
11504 block
->block
->expr1
= cond
;
11505 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11506 t1
, gfc_get_null_expr (&(*code
)->loc
),
11507 NULL
, NULL
, (*code
)->loc
);
11508 gfc_append_code (tail
, block
);
11512 /* Now attach the remaining code chain to the input code. Step on
11513 to the end of the new code since resolution is complete. */
11514 gcc_assert ((*code
)->op
== EXEC_ASSIGN
);
11515 tail
->next
= (*code
)->next
;
11516 /* Overwrite 'code' because this would place the intrinsic assignment
11517 before the temporary for the lhs is created. */
11518 gfc_free_expr ((*code
)->expr1
);
11519 gfc_free_expr ((*code
)->expr2
);
11525 component_assignment_level
--;
11529 /* F2008: Pointer function assignments are of the form:
11530 ptr_fcn (args) = expr
11531 This function breaks these assignments into two statements:
11532 temporary_pointer => ptr_fcn(args)
11533 temporary_pointer = expr */
11536 resolve_ptr_fcn_assign (gfc_code
**code
, gfc_namespace
*ns
)
11538 gfc_expr
*tmp_ptr_expr
;
11539 gfc_code
*this_code
;
11540 gfc_component
*comp
;
11543 if ((*code
)->expr1
->expr_type
!= EXPR_FUNCTION
)
11546 /* Even if standard does not support this feature, continue to build
11547 the two statements to avoid upsetting frontend_passes.c. */
11548 gfc_notify_std (GFC_STD_F2008
, "Pointer procedure assignment at "
11549 "%L", &(*code
)->loc
);
11551 comp
= gfc_get_proc_ptr_comp ((*code
)->expr1
);
11554 s
= comp
->ts
.interface
;
11556 s
= (*code
)->expr1
->symtree
->n
.sym
;
11558 if (s
== NULL
|| !s
->result
->attr
.pointer
)
11560 gfc_error ("The function result on the lhs of the assignment at "
11561 "%L must have the pointer attribute.",
11562 &(*code
)->expr1
->where
);
11563 (*code
)->op
= EXEC_NOP
;
11567 tmp_ptr_expr
= get_temp_from_expr ((*code
)->expr2
, ns
);
11569 /* get_temp_from_expression is set up for ordinary assignments. To that
11570 end, where array bounds are not known, arrays are made allocatable.
11571 Change the temporary to a pointer here. */
11572 tmp_ptr_expr
->symtree
->n
.sym
->attr
.pointer
= 1;
11573 tmp_ptr_expr
->symtree
->n
.sym
->attr
.allocatable
= 0;
11574 tmp_ptr_expr
->where
= (*code
)->loc
;
11576 this_code
= build_assignment (EXEC_ASSIGN
,
11577 tmp_ptr_expr
, (*code
)->expr2
,
11578 NULL
, NULL
, (*code
)->loc
);
11579 this_code
->next
= (*code
)->next
;
11580 (*code
)->next
= this_code
;
11581 (*code
)->op
= EXEC_POINTER_ASSIGN
;
11582 (*code
)->expr2
= (*code
)->expr1
;
11583 (*code
)->expr1
= tmp_ptr_expr
;
11589 /* Deferred character length assignments from an operator expression
11590 require a temporary because the character length of the lhs can
11591 change in the course of the assignment. */
11594 deferred_op_assign (gfc_code
**code
, gfc_namespace
*ns
)
11596 gfc_expr
*tmp_expr
;
11597 gfc_code
*this_code
;
11599 if (!((*code
)->expr1
->ts
.type
== BT_CHARACTER
11600 && (*code
)->expr1
->ts
.deferred
&& (*code
)->expr1
->rank
11601 && (*code
)->expr2
->expr_type
== EXPR_OP
))
11604 if (!gfc_check_dependency ((*code
)->expr1
, (*code
)->expr2
, 1))
11607 if (gfc_expr_attr ((*code
)->expr1
).pointer
)
11610 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11611 tmp_expr
->where
= (*code
)->loc
;
11613 /* A new charlen is required to ensure that the variable string
11614 length is different to that of the original lhs. */
11615 tmp_expr
->ts
.u
.cl
= gfc_get_charlen();
11616 tmp_expr
->symtree
->n
.sym
->ts
.u
.cl
= tmp_expr
->ts
.u
.cl
;
11617 tmp_expr
->ts
.u
.cl
->next
= (*code
)->expr2
->ts
.u
.cl
->next
;
11618 (*code
)->expr2
->ts
.u
.cl
->next
= tmp_expr
->ts
.u
.cl
;
11620 tmp_expr
->symtree
->n
.sym
->ts
.deferred
= 1;
11622 this_code
= build_assignment (EXEC_ASSIGN
,
11624 gfc_copy_expr (tmp_expr
),
11625 NULL
, NULL
, (*code
)->loc
);
11627 (*code
)->expr1
= tmp_expr
;
11629 this_code
->next
= (*code
)->next
;
11630 (*code
)->next
= this_code
;
11636 /* Given a block of code, recursively resolve everything pointed to by this
11640 gfc_resolve_code (gfc_code
*code
, gfc_namespace
*ns
)
11642 int omp_workshare_save
;
11643 int forall_save
, do_concurrent_save
;
11647 frame
.prev
= cs_base
;
11651 find_reachable_labels (code
);
11653 for (; code
; code
= code
->next
)
11655 frame
.current
= code
;
11656 forall_save
= forall_flag
;
11657 do_concurrent_save
= gfc_do_concurrent_flag
;
11659 if (code
->op
== EXEC_FORALL
)
11662 gfc_resolve_forall (code
, ns
, forall_save
);
11665 else if (code
->block
)
11667 omp_workshare_save
= -1;
11670 case EXEC_OACC_PARALLEL_LOOP
:
11671 case EXEC_OACC_PARALLEL
:
11672 case EXEC_OACC_KERNELS_LOOP
:
11673 case EXEC_OACC_KERNELS
:
11674 case EXEC_OACC_SERIAL_LOOP
:
11675 case EXEC_OACC_SERIAL
:
11676 case EXEC_OACC_DATA
:
11677 case EXEC_OACC_HOST_DATA
:
11678 case EXEC_OACC_LOOP
:
11679 gfc_resolve_oacc_blocks (code
, ns
);
11681 case EXEC_OMP_PARALLEL_WORKSHARE
:
11682 omp_workshare_save
= omp_workshare_flag
;
11683 omp_workshare_flag
= 1;
11684 gfc_resolve_omp_parallel_blocks (code
, ns
);
11686 case EXEC_OMP_PARALLEL
:
11687 case EXEC_OMP_PARALLEL_DO
:
11688 case EXEC_OMP_PARALLEL_DO_SIMD
:
11689 case EXEC_OMP_PARALLEL_SECTIONS
:
11690 case EXEC_OMP_TARGET_PARALLEL
:
11691 case EXEC_OMP_TARGET_PARALLEL_DO
:
11692 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11693 case EXEC_OMP_TARGET_TEAMS
:
11694 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11695 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11696 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11697 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11698 case EXEC_OMP_TASK
:
11699 case EXEC_OMP_TASKLOOP
:
11700 case EXEC_OMP_TASKLOOP_SIMD
:
11701 case EXEC_OMP_TEAMS
:
11702 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11703 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11704 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11705 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11706 omp_workshare_save
= omp_workshare_flag
;
11707 omp_workshare_flag
= 0;
11708 gfc_resolve_omp_parallel_blocks (code
, ns
);
11710 case EXEC_OMP_DISTRIBUTE
:
11711 case EXEC_OMP_DISTRIBUTE_SIMD
:
11713 case EXEC_OMP_DO_SIMD
:
11714 case EXEC_OMP_SIMD
:
11715 case EXEC_OMP_TARGET_SIMD
:
11716 gfc_resolve_omp_do_blocks (code
, ns
);
11718 case EXEC_SELECT_TYPE
:
11719 /* Blocks are handled in resolve_select_type because we have
11720 to transform the SELECT TYPE into ASSOCIATE first. */
11722 case EXEC_DO_CONCURRENT
:
11723 gfc_do_concurrent_flag
= 1;
11724 gfc_resolve_blocks (code
->block
, ns
);
11725 gfc_do_concurrent_flag
= 2;
11727 case EXEC_OMP_WORKSHARE
:
11728 omp_workshare_save
= omp_workshare_flag
;
11729 omp_workshare_flag
= 1;
11732 gfc_resolve_blocks (code
->block
, ns
);
11736 if (omp_workshare_save
!= -1)
11737 omp_workshare_flag
= omp_workshare_save
;
11741 if (code
->op
!= EXEC_COMPCALL
&& code
->op
!= EXEC_CALL_PPC
)
11742 t
= gfc_resolve_expr (code
->expr1
);
11743 forall_flag
= forall_save
;
11744 gfc_do_concurrent_flag
= do_concurrent_save
;
11746 if (!gfc_resolve_expr (code
->expr2
))
11749 if (code
->op
== EXEC_ALLOCATE
11750 && !gfc_resolve_expr (code
->expr3
))
11756 case EXEC_END_BLOCK
:
11757 case EXEC_END_NESTED_BLOCK
:
11761 case EXEC_ERROR_STOP
:
11763 case EXEC_CONTINUE
:
11765 case EXEC_ASSIGN_CALL
:
11768 case EXEC_CRITICAL
:
11769 resolve_critical (code
);
11772 case EXEC_SYNC_ALL
:
11773 case EXEC_SYNC_IMAGES
:
11774 case EXEC_SYNC_MEMORY
:
11775 resolve_sync (code
);
11780 case EXEC_EVENT_POST
:
11781 case EXEC_EVENT_WAIT
:
11782 resolve_lock_unlock_event (code
);
11785 case EXEC_FAIL_IMAGE
:
11786 case EXEC_FORM_TEAM
:
11787 case EXEC_CHANGE_TEAM
:
11788 case EXEC_END_TEAM
:
11789 case EXEC_SYNC_TEAM
:
11793 /* Keep track of which entry we are up to. */
11794 current_entry_id
= code
->ext
.entry
->id
;
11798 resolve_where (code
, NULL
);
11802 if (code
->expr1
!= NULL
)
11804 if (code
->expr1
->ts
.type
!= BT_INTEGER
)
11805 gfc_error ("ASSIGNED GOTO statement at %L requires an "
11806 "INTEGER variable", &code
->expr1
->where
);
11807 else if (code
->expr1
->symtree
->n
.sym
->attr
.assign
!= 1)
11808 gfc_error ("Variable %qs has not been assigned a target "
11809 "label at %L", code
->expr1
->symtree
->n
.sym
->name
,
11810 &code
->expr1
->where
);
11813 resolve_branch (code
->label1
, code
);
11817 if (code
->expr1
!= NULL
11818 && (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
))
11819 gfc_error ("Alternate RETURN statement at %L requires a SCALAR-"
11820 "INTEGER return specifier", &code
->expr1
->where
);
11823 case EXEC_INIT_ASSIGN
:
11824 case EXEC_END_PROCEDURE
:
11831 /* Remove a GFC_ISYM_CAF_GET inserted for a coindexed variable on
11833 if (code
->expr1
->expr_type
== EXPR_FUNCTION
11834 && code
->expr1
->value
.function
.isym
11835 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
11836 remove_caf_get_intrinsic (code
->expr1
);
11838 /* If this is a pointer function in an lvalue variable context,
11839 the new code will have to be resolved afresh. This is also the
11840 case with an error, where the code is transformed into NOP to
11841 prevent ICEs downstream. */
11842 if (resolve_ptr_fcn_assign (&code
, ns
)
11843 || code
->op
== EXEC_NOP
)
11846 if (!gfc_check_vardef_context (code
->expr1
, false, false, false,
11850 if (resolve_ordinary_assign (code
, ns
))
11852 if (code
->op
== EXEC_COMPCALL
)
11858 /* Check for dependencies in deferred character length array
11859 assignments and generate a temporary, if necessary. */
11860 if (code
->op
== EXEC_ASSIGN
&& deferred_op_assign (&code
, ns
))
11863 /* F03 7.4.1.3 for non-allocatable, non-pointer components. */
11864 if (code
->op
!= EXEC_CALL
&& code
->expr1
->ts
.type
== BT_DERIVED
11865 && code
->expr1
->ts
.u
.derived
11866 && code
->expr1
->ts
.u
.derived
->attr
.defined_assign_comp
)
11867 generate_component_assignments (&code
, ns
);
11871 case EXEC_LABEL_ASSIGN
:
11872 if (code
->label1
->defined
== ST_LABEL_UNKNOWN
)
11873 gfc_error ("Label %d referenced at %L is never defined",
11874 code
->label1
->value
, &code
->label1
->where
);
11876 && (code
->expr1
->expr_type
!= EXPR_VARIABLE
11877 || code
->expr1
->symtree
->n
.sym
->ts
.type
!= BT_INTEGER
11878 || code
->expr1
->symtree
->n
.sym
->ts
.kind
11879 != gfc_default_integer_kind
11880 || code
->expr1
->symtree
->n
.sym
->as
!= NULL
))
11881 gfc_error ("ASSIGN statement at %L requires a scalar "
11882 "default INTEGER variable", &code
->expr1
->where
);
11885 case EXEC_POINTER_ASSIGN
:
11892 /* This is both a variable definition and pointer assignment
11893 context, so check both of them. For rank remapping, a final
11894 array ref may be present on the LHS and fool gfc_expr_attr
11895 used in gfc_check_vardef_context. Remove it. */
11896 e
= remove_last_array_ref (code
->expr1
);
11897 t
= gfc_check_vardef_context (e
, true, false, false,
11898 _("pointer assignment"));
11900 t
= gfc_check_vardef_context (e
, false, false, false,
11901 _("pointer assignment"));
11904 t
= gfc_check_pointer_assign (code
->expr1
, code
->expr2
, !t
) && t
;
11909 /* Assigning a class object always is a regular assign. */
11910 if (code
->expr2
->ts
.type
== BT_CLASS
11911 && code
->expr1
->ts
.type
== BT_CLASS
11912 && !CLASS_DATA (code
->expr2
)->attr
.dimension
11913 && !(gfc_expr_attr (code
->expr1
).proc_pointer
11914 && code
->expr2
->expr_type
== EXPR_VARIABLE
11915 && code
->expr2
->symtree
->n
.sym
->attr
.flavor
11917 code
->op
= EXEC_ASSIGN
;
11921 case EXEC_ARITHMETIC_IF
:
11923 gfc_expr
*e
= code
->expr1
;
11925 gfc_resolve_expr (e
);
11926 if (e
->expr_type
== EXPR_NULL
)
11927 gfc_error ("Invalid NULL at %L", &e
->where
);
11929 if (t
&& (e
->rank
> 0
11930 || !(e
->ts
.type
== BT_REAL
|| e
->ts
.type
== BT_INTEGER
)))
11931 gfc_error ("Arithmetic IF statement at %L requires a scalar "
11932 "REAL or INTEGER expression", &e
->where
);
11934 resolve_branch (code
->label1
, code
);
11935 resolve_branch (code
->label2
, code
);
11936 resolve_branch (code
->label3
, code
);
11941 if (t
&& code
->expr1
!= NULL
11942 && (code
->expr1
->ts
.type
!= BT_LOGICAL
11943 || code
->expr1
->rank
!= 0))
11944 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
11945 &code
->expr1
->where
);
11950 resolve_call (code
);
11953 case EXEC_COMPCALL
:
11955 resolve_typebound_subroutine (code
);
11958 case EXEC_CALL_PPC
:
11959 resolve_ppc_call (code
);
11963 /* Select is complicated. Also, a SELECT construct could be
11964 a transformed computed GOTO. */
11965 resolve_select (code
, false);
11968 case EXEC_SELECT_TYPE
:
11969 resolve_select_type (code
, ns
);
11972 case EXEC_SELECT_RANK
:
11973 resolve_select_rank (code
, ns
);
11977 resolve_block_construct (code
);
11981 if (code
->ext
.iterator
!= NULL
)
11983 gfc_iterator
*iter
= code
->ext
.iterator
;
11984 if (gfc_resolve_iterator (iter
, true, false))
11985 gfc_resolve_do_iterator (code
, iter
->var
->symtree
->n
.sym
,
11990 case EXEC_DO_WHILE
:
11991 if (code
->expr1
== NULL
)
11992 gfc_internal_error ("gfc_resolve_code(): No expression on "
11995 && (code
->expr1
->rank
!= 0
11996 || code
->expr1
->ts
.type
!= BT_LOGICAL
))
11997 gfc_error ("Exit condition of DO WHILE loop at %L must be "
11998 "a scalar LOGICAL expression", &code
->expr1
->where
);
12001 case EXEC_ALLOCATE
:
12003 resolve_allocate_deallocate (code
, "ALLOCATE");
12007 case EXEC_DEALLOCATE
:
12009 resolve_allocate_deallocate (code
, "DEALLOCATE");
12014 if (!gfc_resolve_open (code
->ext
.open
, &code
->loc
))
12017 resolve_branch (code
->ext
.open
->err
, code
);
12021 if (!gfc_resolve_close (code
->ext
.close
, &code
->loc
))
12024 resolve_branch (code
->ext
.close
->err
, code
);
12027 case EXEC_BACKSPACE
:
12031 if (!gfc_resolve_filepos (code
->ext
.filepos
, &code
->loc
))
12034 resolve_branch (code
->ext
.filepos
->err
, code
);
12038 if (!gfc_resolve_inquire (code
->ext
.inquire
))
12041 resolve_branch (code
->ext
.inquire
->err
, code
);
12044 case EXEC_IOLENGTH
:
12045 gcc_assert (code
->ext
.inquire
!= NULL
);
12046 if (!gfc_resolve_inquire (code
->ext
.inquire
))
12049 resolve_branch (code
->ext
.inquire
->err
, code
);
12053 if (!gfc_resolve_wait (code
->ext
.wait
))
12056 resolve_branch (code
->ext
.wait
->err
, code
);
12057 resolve_branch (code
->ext
.wait
->end
, code
);
12058 resolve_branch (code
->ext
.wait
->eor
, code
);
12063 if (!gfc_resolve_dt (code
, code
->ext
.dt
, &code
->loc
))
12066 resolve_branch (code
->ext
.dt
->err
, code
);
12067 resolve_branch (code
->ext
.dt
->end
, code
);
12068 resolve_branch (code
->ext
.dt
->eor
, code
);
12071 case EXEC_TRANSFER
:
12072 resolve_transfer (code
);
12075 case EXEC_DO_CONCURRENT
:
12077 resolve_forall_iterators (code
->ext
.forall_iterator
);
12079 if (code
->expr1
!= NULL
12080 && (code
->expr1
->ts
.type
!= BT_LOGICAL
|| code
->expr1
->rank
))
12081 gfc_error ("FORALL mask clause at %L requires a scalar LOGICAL "
12082 "expression", &code
->expr1
->where
);
12085 case EXEC_OACC_PARALLEL_LOOP
:
12086 case EXEC_OACC_PARALLEL
:
12087 case EXEC_OACC_KERNELS_LOOP
:
12088 case EXEC_OACC_KERNELS
:
12089 case EXEC_OACC_SERIAL_LOOP
:
12090 case EXEC_OACC_SERIAL
:
12091 case EXEC_OACC_DATA
:
12092 case EXEC_OACC_HOST_DATA
:
12093 case EXEC_OACC_LOOP
:
12094 case EXEC_OACC_UPDATE
:
12095 case EXEC_OACC_WAIT
:
12096 case EXEC_OACC_CACHE
:
12097 case EXEC_OACC_ENTER_DATA
:
12098 case EXEC_OACC_EXIT_DATA
:
12099 case EXEC_OACC_ATOMIC
:
12100 case EXEC_OACC_DECLARE
:
12101 gfc_resolve_oacc_directive (code
, ns
);
12104 case EXEC_OMP_ATOMIC
:
12105 case EXEC_OMP_BARRIER
:
12106 case EXEC_OMP_CANCEL
:
12107 case EXEC_OMP_CANCELLATION_POINT
:
12108 case EXEC_OMP_CRITICAL
:
12109 case EXEC_OMP_FLUSH
:
12110 case EXEC_OMP_DISTRIBUTE
:
12111 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
12112 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
12113 case EXEC_OMP_DISTRIBUTE_SIMD
:
12115 case EXEC_OMP_DO_SIMD
:
12116 case EXEC_OMP_MASTER
:
12117 case EXEC_OMP_ORDERED
:
12118 case EXEC_OMP_SECTIONS
:
12119 case EXEC_OMP_SIMD
:
12120 case EXEC_OMP_SINGLE
:
12121 case EXEC_OMP_TARGET
:
12122 case EXEC_OMP_TARGET_DATA
:
12123 case EXEC_OMP_TARGET_ENTER_DATA
:
12124 case EXEC_OMP_TARGET_EXIT_DATA
:
12125 case EXEC_OMP_TARGET_PARALLEL
:
12126 case EXEC_OMP_TARGET_PARALLEL_DO
:
12127 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
12128 case EXEC_OMP_TARGET_SIMD
:
12129 case EXEC_OMP_TARGET_TEAMS
:
12130 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
12131 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
12132 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
12133 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
12134 case EXEC_OMP_TARGET_UPDATE
:
12135 case EXEC_OMP_TASK
:
12136 case EXEC_OMP_TASKGROUP
:
12137 case EXEC_OMP_TASKLOOP
:
12138 case EXEC_OMP_TASKLOOP_SIMD
:
12139 case EXEC_OMP_TASKWAIT
:
12140 case EXEC_OMP_TASKYIELD
:
12141 case EXEC_OMP_TEAMS
:
12142 case EXEC_OMP_TEAMS_DISTRIBUTE
:
12143 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
12144 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
12145 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
12146 case EXEC_OMP_WORKSHARE
:
12147 gfc_resolve_omp_directive (code
, ns
);
12150 case EXEC_OMP_PARALLEL
:
12151 case EXEC_OMP_PARALLEL_DO
:
12152 case EXEC_OMP_PARALLEL_DO_SIMD
:
12153 case EXEC_OMP_PARALLEL_SECTIONS
:
12154 case EXEC_OMP_PARALLEL_WORKSHARE
:
12155 omp_workshare_save
= omp_workshare_flag
;
12156 omp_workshare_flag
= 0;
12157 gfc_resolve_omp_directive (code
, ns
);
12158 omp_workshare_flag
= omp_workshare_save
;
12162 gfc_internal_error ("gfc_resolve_code(): Bad statement code");
12166 cs_base
= frame
.prev
;
12170 /* Resolve initial values and make sure they are compatible with
12174 resolve_values (gfc_symbol
*sym
)
12178 if (sym
->value
== NULL
)
12181 if (sym
->value
->expr_type
== EXPR_STRUCTURE
)
12182 t
= resolve_structure_cons (sym
->value
, 1);
12184 t
= gfc_resolve_expr (sym
->value
);
12189 gfc_check_assign_symbol (sym
, NULL
, sym
->value
);
12193 /* Verify any BIND(C) derived types in the namespace so we can report errors
12194 for them once, rather than for each variable declared of that type. */
12197 resolve_bind_c_derived_types (gfc_symbol
*derived_sym
)
12199 if (derived_sym
!= NULL
&& derived_sym
->attr
.flavor
== FL_DERIVED
12200 && derived_sym
->attr
.is_bind_c
== 1)
12201 verify_bind_c_derived_type (derived_sym
);
12207 /* Check the interfaces of DTIO procedures associated with derived
12208 type 'sym'. These procedures can either have typebound bindings or
12209 can appear in DTIO generic interfaces. */
12212 gfc_verify_DTIO_procedures (gfc_symbol
*sym
)
12214 if (!sym
|| sym
->attr
.flavor
!= FL_DERIVED
)
12217 gfc_check_dtio_interfaces (sym
);
12222 /* Verify that any binding labels used in a given namespace do not collide
12223 with the names or binding labels of any global symbols. Multiple INTERFACE
12224 for the same procedure are permitted. */
12227 gfc_verify_binding_labels (gfc_symbol
*sym
)
12230 const char *module
;
12232 if (!sym
|| !sym
->attr
.is_bind_c
|| sym
->attr
.is_iso_c
12233 || sym
->attr
.flavor
== FL_DERIVED
|| !sym
->binding_label
)
12236 gsym
= gfc_find_case_gsymbol (gfc_gsym_root
, sym
->binding_label
);
12239 module
= sym
->module
;
12240 else if (sym
->ns
&& sym
->ns
->proc_name
12241 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
12242 module
= sym
->ns
->proc_name
->name
;
12243 else if (sym
->ns
&& sym
->ns
->parent
12244 && sym
->ns
&& sym
->ns
->parent
->proc_name
12245 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12246 module
= sym
->ns
->parent
->proc_name
->name
;
12252 && (gsym
->type
== GSYM_FUNCTION
|| gsym
->type
== GSYM_SUBROUTINE
)))
12255 gsym
= gfc_get_gsymbol (sym
->binding_label
, true);
12256 gsym
->where
= sym
->declared_at
;
12257 gsym
->sym_name
= sym
->name
;
12258 gsym
->binding_label
= sym
->binding_label
;
12259 gsym
->ns
= sym
->ns
;
12260 gsym
->mod_name
= module
;
12261 if (sym
->attr
.function
)
12262 gsym
->type
= GSYM_FUNCTION
;
12263 else if (sym
->attr
.subroutine
)
12264 gsym
->type
= GSYM_SUBROUTINE
;
12265 /* Mark as variable/procedure as defined, unless its an INTERFACE. */
12266 gsym
->defined
= sym
->attr
.if_source
!= IFSRC_IFBODY
;
12270 if (sym
->attr
.flavor
== FL_VARIABLE
&& gsym
->type
!= GSYM_UNKNOWN
)
12272 gfc_error ("Variable %qs with binding label %qs at %L uses the same global "
12273 "identifier as entity at %L", sym
->name
,
12274 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
12275 /* Clear the binding label to prevent checking multiple times. */
12276 sym
->binding_label
= NULL
;
12280 if (sym
->attr
.flavor
== FL_VARIABLE
&& module
12281 && (strcmp (module
, gsym
->mod_name
) != 0
12282 || strcmp (sym
->name
, gsym
->sym_name
) != 0))
12284 /* This can only happen if the variable is defined in a module - if it
12285 isn't the same module, reject it. */
12286 gfc_error ("Variable %qs from module %qs with binding label %qs at %L "
12287 "uses the same global identifier as entity at %L from module %qs",
12288 sym
->name
, module
, sym
->binding_label
,
12289 &sym
->declared_at
, &gsym
->where
, gsym
->mod_name
);
12290 sym
->binding_label
= NULL
;
12294 if ((sym
->attr
.function
|| sym
->attr
.subroutine
)
12295 && ((gsym
->type
!= GSYM_SUBROUTINE
&& gsym
->type
!= GSYM_FUNCTION
)
12296 || (gsym
->defined
&& sym
->attr
.if_source
!= IFSRC_IFBODY
))
12297 && (sym
!= gsym
->ns
->proc_name
&& sym
->attr
.entry
== 0)
12298 && (module
!= gsym
->mod_name
12299 || strcmp (gsym
->sym_name
, sym
->name
) != 0
12300 || (module
&& strcmp (module
, gsym
->mod_name
) != 0)))
12302 /* Print an error if the procedure is defined multiple times; we have to
12303 exclude references to the same procedure via module association or
12304 multiple checks for the same procedure. */
12305 gfc_error ("Procedure %qs with binding label %qs at %L uses the same "
12306 "global identifier as entity at %L", sym
->name
,
12307 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
12308 sym
->binding_label
= NULL
;
12313 /* Resolve an index expression. */
12316 resolve_index_expr (gfc_expr
*e
)
12318 if (!gfc_resolve_expr (e
))
12321 if (!gfc_simplify_expr (e
, 0))
12324 if (!gfc_specification_expr (e
))
12331 /* Resolve a charlen structure. */
12334 resolve_charlen (gfc_charlen
*cl
)
12337 bool saved_specification_expr
;
12343 saved_specification_expr
= specification_expr
;
12344 specification_expr
= true;
12346 if (cl
->length_from_typespec
)
12348 if (!gfc_resolve_expr (cl
->length
))
12350 specification_expr
= saved_specification_expr
;
12354 if (!gfc_simplify_expr (cl
->length
, 0))
12356 specification_expr
= saved_specification_expr
;
12360 /* cl->length has been resolved. It should have an integer type. */
12361 if (cl
->length
->ts
.type
!= BT_INTEGER
|| cl
->length
->rank
!= 0)
12363 gfc_error ("Scalar INTEGER expression expected at %L",
12364 &cl
->length
->where
);
12370 if (!resolve_index_expr (cl
->length
))
12372 specification_expr
= saved_specification_expr
;
12377 /* F2008, 4.4.3.2: If the character length parameter value evaluates to
12378 a negative value, the length of character entities declared is zero. */
12379 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
12380 && mpz_sgn (cl
->length
->value
.integer
) < 0)
12381 gfc_replace_expr (cl
->length
,
12382 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 0));
12384 /* Check that the character length is not too large. */
12385 k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
12386 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
12387 && cl
->length
->ts
.type
== BT_INTEGER
12388 && mpz_cmp (cl
->length
->value
.integer
, gfc_integer_kinds
[k
].huge
) > 0)
12390 gfc_error ("String length at %L is too large", &cl
->length
->where
);
12391 specification_expr
= saved_specification_expr
;
12395 specification_expr
= saved_specification_expr
;
12400 /* Test for non-constant shape arrays. */
12403 is_non_constant_shape_array (gfc_symbol
*sym
)
12409 not_constant
= false;
12410 if (sym
->as
!= NULL
)
12412 /* Unfortunately, !gfc_is_compile_time_shape hits a legal case that
12413 has not been simplified; parameter array references. Do the
12414 simplification now. */
12415 for (i
= 0; i
< sym
->as
->rank
+ sym
->as
->corank
; i
++)
12417 if (i
== GFC_MAX_DIMENSIONS
)
12420 e
= sym
->as
->lower
[i
];
12421 if (e
&& (!resolve_index_expr(e
)
12422 || !gfc_is_constant_expr (e
)))
12423 not_constant
= true;
12424 e
= sym
->as
->upper
[i
];
12425 if (e
&& (!resolve_index_expr(e
)
12426 || !gfc_is_constant_expr (e
)))
12427 not_constant
= true;
12430 return not_constant
;
12433 /* Given a symbol and an initialization expression, add code to initialize
12434 the symbol to the function entry. */
12436 build_init_assign (gfc_symbol
*sym
, gfc_expr
*init
)
12440 gfc_namespace
*ns
= sym
->ns
;
12442 /* Search for the function namespace if this is a contained
12443 function without an explicit result. */
12444 if (sym
->attr
.function
&& sym
== sym
->result
12445 && sym
->name
!= sym
->ns
->proc_name
->name
)
12447 ns
= ns
->contained
;
12448 for (;ns
; ns
= ns
->sibling
)
12449 if (strcmp (ns
->proc_name
->name
, sym
->name
) == 0)
12455 gfc_free_expr (init
);
12459 /* Build an l-value expression for the result. */
12460 lval
= gfc_lval_expr_from_sym (sym
);
12462 /* Add the code at scope entry. */
12463 init_st
= gfc_get_code (EXEC_INIT_ASSIGN
);
12464 init_st
->next
= ns
->code
;
12465 ns
->code
= init_st
;
12467 /* Assign the default initializer to the l-value. */
12468 init_st
->loc
= sym
->declared_at
;
12469 init_st
->expr1
= lval
;
12470 init_st
->expr2
= init
;
12474 /* Whether or not we can generate a default initializer for a symbol. */
12477 can_generate_init (gfc_symbol
*sym
)
12479 symbol_attribute
*a
;
12484 /* These symbols should never have a default initialization. */
12489 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
12490 && (CLASS_DATA (sym
)->attr
.class_pointer
12491 || CLASS_DATA (sym
)->attr
.proc_pointer
))
12492 || a
->in_equivalence
12499 || (!a
->referenced
&& !a
->result
)
12500 || (a
->dummy
&& a
->intent
!= INTENT_OUT
)
12501 || (a
->function
&& sym
!= sym
->result
)
12506 /* Assign the default initializer to a derived type variable or result. */
12509 apply_default_init (gfc_symbol
*sym
)
12511 gfc_expr
*init
= NULL
;
12513 if (sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12516 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
)
12517 init
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12519 if (init
== NULL
&& sym
->ts
.type
!= BT_CLASS
)
12522 build_init_assign (sym
, init
);
12523 sym
->attr
.referenced
= 1;
12527 /* Build an initializer for a local. Returns null if the symbol should not have
12528 a default initialization. */
12531 build_default_init_expr (gfc_symbol
*sym
)
12533 /* These symbols should never have a default initialization. */
12534 if (sym
->attr
.allocatable
12535 || sym
->attr
.external
12537 || sym
->attr
.pointer
12538 || sym
->attr
.in_equivalence
12539 || sym
->attr
.in_common
12542 || sym
->attr
.cray_pointee
12543 || sym
->attr
.cray_pointer
12547 /* Get the appropriate init expression. */
12548 return gfc_build_default_init_expr (&sym
->ts
, &sym
->declared_at
);
12551 /* Add an initialization expression to a local variable. */
12553 apply_default_init_local (gfc_symbol
*sym
)
12555 gfc_expr
*init
= NULL
;
12557 /* The symbol should be a variable or a function return value. */
12558 if ((sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12559 || (sym
->attr
.function
&& sym
->result
!= sym
))
12562 /* Try to build the initializer expression. If we can't initialize
12563 this symbol, then init will be NULL. */
12564 init
= build_default_init_expr (sym
);
12568 /* For saved variables, we don't want to add an initializer at function
12569 entry, so we just add a static initializer. Note that automatic variables
12570 are stack allocated even with -fno-automatic; we have also to exclude
12571 result variable, which are also nonstatic. */
12572 if (!sym
->attr
.automatic
12573 && (sym
->attr
.save
|| sym
->ns
->save_all
12574 || (flag_max_stack_var_size
== 0 && !sym
->attr
.result
12575 && (sym
->ns
->proc_name
&& !sym
->ns
->proc_name
->attr
.recursive
)
12576 && (!sym
->attr
.dimension
|| !is_non_constant_shape_array (sym
)))))
12578 /* Don't clobber an existing initializer! */
12579 gcc_assert (sym
->value
== NULL
);
12584 build_init_assign (sym
, init
);
12588 /* Resolution of common features of flavors variable and procedure. */
12591 resolve_fl_var_and_proc (gfc_symbol
*sym
, int mp_flag
)
12593 gfc_array_spec
*as
;
12595 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12596 as
= CLASS_DATA (sym
)->as
;
12600 /* Constraints on deferred shape variable. */
12601 if (as
== NULL
|| as
->type
!= AS_DEFERRED
)
12603 bool pointer
, allocatable
, dimension
;
12605 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12607 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
12608 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
12609 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
12613 pointer
= sym
->attr
.pointer
&& !sym
->attr
.select_type_temporary
;
12614 allocatable
= sym
->attr
.allocatable
;
12615 dimension
= sym
->attr
.dimension
;
12620 if (dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12622 gfc_error ("Allocatable array %qs at %L must have a deferred "
12623 "shape or assumed rank", sym
->name
, &sym
->declared_at
);
12626 else if (!gfc_notify_std (GFC_STD_F2003
, "Scalar object "
12627 "%qs at %L may not be ALLOCATABLE",
12628 sym
->name
, &sym
->declared_at
))
12632 if (pointer
&& dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12634 gfc_error ("Array pointer %qs at %L must have a deferred shape or "
12635 "assumed rank", sym
->name
, &sym
->declared_at
);
12642 if (!mp_flag
&& !sym
->attr
.allocatable
&& !sym
->attr
.pointer
12643 && sym
->ts
.type
!= BT_CLASS
&& !sym
->assoc
)
12645 gfc_error ("Array %qs at %L cannot have a deferred shape",
12646 sym
->name
, &sym
->declared_at
);
12651 /* Constraints on polymorphic variables. */
12652 if (sym
->ts
.type
== BT_CLASS
&& !(sym
->result
&& sym
->result
!= sym
))
12655 if (sym
->attr
.class_ok
12656 && !sym
->attr
.select_type_temporary
12657 && !UNLIMITED_POLY (sym
)
12658 && !gfc_type_is_extensible (CLASS_DATA (sym
)->ts
.u
.derived
))
12660 gfc_error ("Type %qs of CLASS variable %qs at %L is not extensible",
12661 CLASS_DATA (sym
)->ts
.u
.derived
->name
, sym
->name
,
12662 &sym
->declared_at
);
12667 /* Assume that use associated symbols were checked in the module ns.
12668 Class-variables that are associate-names are also something special
12669 and excepted from the test. */
12670 if (!sym
->attr
.class_ok
&& !sym
->attr
.use_assoc
&& !sym
->assoc
)
12672 gfc_error ("CLASS variable %qs at %L must be dummy, allocatable "
12673 "or pointer", sym
->name
, &sym
->declared_at
);
12682 /* Additional checks for symbols with flavor variable and derived
12683 type. To be called from resolve_fl_variable. */
12686 resolve_fl_variable_derived (gfc_symbol
*sym
, int no_init_flag
)
12688 gcc_assert (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
);
12690 /* Check to see if a derived type is blocked from being host
12691 associated by the presence of another class I symbol in the same
12692 namespace. 14.6.1.3 of the standard and the discussion on
12693 comp.lang.fortran. */
12694 if (sym
->ns
!= sym
->ts
.u
.derived
->ns
12695 && !sym
->ts
.u
.derived
->attr
.use_assoc
12696 && sym
->ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
12699 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 0, &s
);
12700 if (s
&& s
->attr
.generic
)
12701 s
= gfc_find_dt_in_generic (s
);
12702 if (s
&& !gfc_fl_struct (s
->attr
.flavor
))
12704 gfc_error ("The type %qs cannot be host associated at %L "
12705 "because it is blocked by an incompatible object "
12706 "of the same name declared at %L",
12707 sym
->ts
.u
.derived
->name
, &sym
->declared_at
,
12713 /* 4th constraint in section 11.3: "If an object of a type for which
12714 component-initialization is specified (R429) appears in the
12715 specification-part of a module and does not have the ALLOCATABLE
12716 or POINTER attribute, the object shall have the SAVE attribute."
12718 The check for initializers is performed with
12719 gfc_has_default_initializer because gfc_default_initializer generates
12720 a hidden default for allocatable components. */
12721 if (!(sym
->value
|| no_init_flag
) && sym
->ns
->proc_name
12722 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12723 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
) && !sym
->attr
.save
12724 && !sym
->attr
.pointer
&& !sym
->attr
.allocatable
12725 && gfc_has_default_initializer (sym
->ts
.u
.derived
)
12726 && !gfc_notify_std (GFC_STD_F2008
, "Implied SAVE for module variable "
12727 "%qs at %L, needed due to the default "
12728 "initialization", sym
->name
, &sym
->declared_at
))
12731 /* Assign default initializer. */
12732 if (!(sym
->value
|| sym
->attr
.pointer
|| sym
->attr
.allocatable
)
12733 && (!no_init_flag
|| sym
->attr
.intent
== INTENT_OUT
))
12734 sym
->value
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12740 /* F2008, C402 (R401): A colon shall not be used as a type-param-value
12741 except in the declaration of an entity or component that has the POINTER
12742 or ALLOCATABLE attribute. */
12745 deferred_requirements (gfc_symbol
*sym
)
12747 if (sym
->ts
.deferred
12748 && !(sym
->attr
.pointer
12749 || sym
->attr
.allocatable
12750 || sym
->attr
.associate_var
12751 || sym
->attr
.omp_udr_artificial_var
))
12753 /* If a function has a result variable, only check the variable. */
12754 if (sym
->result
&& sym
->name
!= sym
->result
->name
)
12757 gfc_error ("Entity %qs at %L has a deferred type parameter and "
12758 "requires either the POINTER or ALLOCATABLE attribute",
12759 sym
->name
, &sym
->declared_at
);
12766 /* Resolve symbols with flavor variable. */
12769 resolve_fl_variable (gfc_symbol
*sym
, int mp_flag
)
12771 const char *auto_save_msg
= "Automatic object %qs at %L cannot have the "
12774 if (!resolve_fl_var_and_proc (sym
, mp_flag
))
12777 /* Set this flag to check that variables are parameters of all entries.
12778 This check is effected by the call to gfc_resolve_expr through
12779 is_non_constant_shape_array. */
12780 bool saved_specification_expr
= specification_expr
;
12781 specification_expr
= true;
12783 if (sym
->ns
->proc_name
12784 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12785 || sym
->ns
->proc_name
->attr
.is_main_program
)
12786 && !sym
->attr
.use_assoc
12787 && !sym
->attr
.allocatable
12788 && !sym
->attr
.pointer
12789 && is_non_constant_shape_array (sym
))
12791 /* F08:C541. The shape of an array defined in a main program or module
12792 * needs to be constant. */
12793 gfc_error ("The module or main program array %qs at %L must "
12794 "have constant shape", sym
->name
, &sym
->declared_at
);
12795 specification_expr
= saved_specification_expr
;
12799 /* Constraints on deferred type parameter. */
12800 if (!deferred_requirements (sym
))
12803 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.associate_var
)
12805 /* Make sure that character string variables with assumed length are
12806 dummy arguments. */
12807 gfc_expr
*e
= NULL
;
12810 e
= sym
->ts
.u
.cl
->length
;
12814 if (e
== NULL
&& !sym
->attr
.dummy
&& !sym
->attr
.result
12815 && !sym
->ts
.deferred
&& !sym
->attr
.select_type_temporary
12816 && !sym
->attr
.omp_udr_artificial_var
)
12818 gfc_error ("Entity with assumed character length at %L must be a "
12819 "dummy argument or a PARAMETER", &sym
->declared_at
);
12820 specification_expr
= saved_specification_expr
;
12824 if (e
&& sym
->attr
.save
== SAVE_EXPLICIT
&& !gfc_is_constant_expr (e
))
12826 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12827 specification_expr
= saved_specification_expr
;
12831 if (!gfc_is_constant_expr (e
)
12832 && !(e
->expr_type
== EXPR_VARIABLE
12833 && e
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
))
12835 if (!sym
->attr
.use_assoc
&& sym
->ns
->proc_name
12836 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12837 || sym
->ns
->proc_name
->attr
.is_main_program
))
12839 gfc_error ("%qs at %L must have constant character length "
12840 "in this context", sym
->name
, &sym
->declared_at
);
12841 specification_expr
= saved_specification_expr
;
12844 if (sym
->attr
.in_common
)
12846 gfc_error ("COMMON variable %qs at %L must have constant "
12847 "character length", sym
->name
, &sym
->declared_at
);
12848 specification_expr
= saved_specification_expr
;
12854 if (sym
->value
== NULL
&& sym
->attr
.referenced
)
12855 apply_default_init_local (sym
); /* Try to apply a default initialization. */
12857 /* Determine if the symbol may not have an initializer. */
12858 int no_init_flag
= 0, automatic_flag
= 0;
12859 if (sym
->attr
.allocatable
|| sym
->attr
.external
|| sym
->attr
.dummy
12860 || sym
->attr
.intrinsic
|| sym
->attr
.result
)
12862 else if ((sym
->attr
.dimension
|| sym
->attr
.codimension
) && !sym
->attr
.pointer
12863 && is_non_constant_shape_array (sym
))
12865 no_init_flag
= automatic_flag
= 1;
12867 /* Also, they must not have the SAVE attribute.
12868 SAVE_IMPLICIT is checked below. */
12869 if (sym
->as
&& sym
->attr
.codimension
)
12871 int corank
= sym
->as
->corank
;
12872 sym
->as
->corank
= 0;
12873 no_init_flag
= automatic_flag
= is_non_constant_shape_array (sym
);
12874 sym
->as
->corank
= corank
;
12876 if (automatic_flag
&& sym
->attr
.save
== SAVE_EXPLICIT
)
12878 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12879 specification_expr
= saved_specification_expr
;
12884 /* Ensure that any initializer is simplified. */
12886 gfc_simplify_expr (sym
->value
, 1);
12888 /* Reject illegal initializers. */
12889 if (!sym
->mark
&& sym
->value
)
12891 if (sym
->attr
.allocatable
|| (sym
->ts
.type
== BT_CLASS
12892 && CLASS_DATA (sym
)->attr
.allocatable
))
12893 gfc_error ("Allocatable %qs at %L cannot have an initializer",
12894 sym
->name
, &sym
->declared_at
);
12895 else if (sym
->attr
.external
)
12896 gfc_error ("External %qs at %L cannot have an initializer",
12897 sym
->name
, &sym
->declared_at
);
12898 else if (sym
->attr
.dummy
12899 && !(sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.intent
== INTENT_OUT
))
12900 gfc_error ("Dummy %qs at %L cannot have an initializer",
12901 sym
->name
, &sym
->declared_at
);
12902 else if (sym
->attr
.intrinsic
)
12903 gfc_error ("Intrinsic %qs at %L cannot have an initializer",
12904 sym
->name
, &sym
->declared_at
);
12905 else if (sym
->attr
.result
)
12906 gfc_error ("Function result %qs at %L cannot have an initializer",
12907 sym
->name
, &sym
->declared_at
);
12908 else if (automatic_flag
)
12909 gfc_error ("Automatic array %qs at %L cannot have an initializer",
12910 sym
->name
, &sym
->declared_at
);
12912 goto no_init_error
;
12913 specification_expr
= saved_specification_expr
;
12918 if (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
)
12920 bool res
= resolve_fl_variable_derived (sym
, no_init_flag
);
12921 specification_expr
= saved_specification_expr
;
12925 specification_expr
= saved_specification_expr
;
12930 /* Compare the dummy characteristics of a module procedure interface
12931 declaration with the corresponding declaration in a submodule. */
12932 static gfc_formal_arglist
*new_formal
;
12933 static char errmsg
[200];
12936 compare_fsyms (gfc_symbol
*sym
)
12940 if (sym
== NULL
|| new_formal
== NULL
)
12943 fsym
= new_formal
->sym
;
12948 if (strcmp (sym
->name
, fsym
->name
) == 0)
12950 if (!gfc_check_dummy_characteristics (fsym
, sym
, true, errmsg
, 200))
12951 gfc_error ("%s at %L", errmsg
, &fsym
->declared_at
);
12956 /* Resolve a procedure. */
12959 resolve_fl_procedure (gfc_symbol
*sym
, int mp_flag
)
12961 gfc_formal_arglist
*arg
;
12963 if (sym
->attr
.function
12964 && !resolve_fl_var_and_proc (sym
, mp_flag
))
12967 /* Constraints on deferred type parameter. */
12968 if (!deferred_requirements (sym
))
12971 if (sym
->ts
.type
== BT_CHARACTER
)
12973 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
12975 if (cl
&& cl
->length
&& gfc_is_constant_expr (cl
->length
)
12976 && !resolve_charlen (cl
))
12979 if ((!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
12980 && sym
->attr
.proc
== PROC_ST_FUNCTION
)
12982 gfc_error ("Character-valued statement function %qs at %L must "
12983 "have constant length", sym
->name
, &sym
->declared_at
);
12988 /* Ensure that derived type for are not of a private type. Internal
12989 module procedures are excluded by 2.2.3.3 - i.e., they are not
12990 externally accessible and can access all the objects accessible in
12992 if (!(sym
->ns
->parent
&& sym
->ns
->parent
->proc_name
12993 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12994 && gfc_check_symbol_access (sym
))
12996 gfc_interface
*iface
;
12998 for (arg
= gfc_sym_get_dummy_args (sym
); arg
; arg
= arg
->next
)
13001 && arg
->sym
->ts
.type
== BT_DERIVED
13002 && arg
->sym
->ts
.u
.derived
13003 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
13004 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
13005 && !gfc_notify_std (GFC_STD_F2003
, "%qs is of a PRIVATE type "
13006 "and cannot be a dummy argument"
13007 " of %qs, which is PUBLIC at %L",
13008 arg
->sym
->name
, sym
->name
,
13009 &sym
->declared_at
))
13011 /* Stop this message from recurring. */
13012 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
13017 /* PUBLIC interfaces may expose PRIVATE procedures that take types
13018 PRIVATE to the containing module. */
13019 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
13021 for (arg
= gfc_sym_get_dummy_args (iface
->sym
); arg
; arg
= arg
->next
)
13024 && arg
->sym
->ts
.type
== BT_DERIVED
13025 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
13026 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
13027 && !gfc_notify_std (GFC_STD_F2003
, "Procedure %qs in "
13028 "PUBLIC interface %qs at %L "
13029 "takes dummy arguments of %qs which "
13030 "is PRIVATE", iface
->sym
->name
,
13031 sym
->name
, &iface
->sym
->declared_at
,
13032 gfc_typename(&arg
->sym
->ts
)))
13034 /* Stop this message from recurring. */
13035 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
13042 if (sym
->attr
.function
&& sym
->value
&& sym
->attr
.proc
!= PROC_ST_FUNCTION
13043 && !sym
->attr
.proc_pointer
)
13045 gfc_error ("Function %qs at %L cannot have an initializer",
13046 sym
->name
, &sym
->declared_at
);
13048 /* Make sure no second error is issued for this. */
13049 sym
->value
->error
= 1;
13053 /* An external symbol may not have an initializer because it is taken to be
13054 a procedure. Exception: Procedure Pointers. */
13055 if (sym
->attr
.external
&& sym
->value
&& !sym
->attr
.proc_pointer
)
13057 gfc_error ("External object %qs at %L may not have an initializer",
13058 sym
->name
, &sym
->declared_at
);
13062 /* An elemental function is required to return a scalar 12.7.1 */
13063 if (sym
->attr
.elemental
&& sym
->attr
.function
13064 && (sym
->as
|| (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)))
13066 gfc_error ("ELEMENTAL function %qs at %L must have a scalar "
13067 "result", sym
->name
, &sym
->declared_at
);
13068 /* Reset so that the error only occurs once. */
13069 sym
->attr
.elemental
= 0;
13073 if (sym
->attr
.proc
== PROC_ST_FUNCTION
13074 && (sym
->attr
.allocatable
|| sym
->attr
.pointer
))
13076 gfc_error ("Statement function %qs at %L may not have pointer or "
13077 "allocatable attribute", sym
->name
, &sym
->declared_at
);
13081 /* 5.1.1.5 of the Standard: A function name declared with an asterisk
13082 char-len-param shall not be array-valued, pointer-valued, recursive
13083 or pure. ....snip... A character value of * may only be used in the
13084 following ways: (i) Dummy arg of procedure - dummy associates with
13085 actual length; (ii) To declare a named constant; or (iii) External
13086 function - but length must be declared in calling scoping unit. */
13087 if (sym
->attr
.function
13088 && sym
->ts
.type
== BT_CHARACTER
&& !sym
->ts
.deferred
13089 && sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
== NULL
)
13091 if ((sym
->as
&& sym
->as
->rank
) || (sym
->attr
.pointer
)
13092 || (sym
->attr
.recursive
) || (sym
->attr
.pure
))
13094 if (sym
->as
&& sym
->as
->rank
)
13095 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
13096 "array-valued", sym
->name
, &sym
->declared_at
);
13098 if (sym
->attr
.pointer
)
13099 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
13100 "pointer-valued", sym
->name
, &sym
->declared_at
);
13102 if (sym
->attr
.pure
)
13103 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
13104 "pure", sym
->name
, &sym
->declared_at
);
13106 if (sym
->attr
.recursive
)
13107 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
13108 "recursive", sym
->name
, &sym
->declared_at
);
13113 /* Appendix B.2 of the standard. Contained functions give an
13114 error anyway. Deferred character length is an F2003 feature.
13115 Don't warn on intrinsic conversion functions, which start
13116 with two underscores. */
13117 if (!sym
->attr
.contained
&& !sym
->ts
.deferred
13118 && (sym
->name
[0] != '_' || sym
->name
[1] != '_'))
13119 gfc_notify_std (GFC_STD_F95_OBS
,
13120 "CHARACTER(*) function %qs at %L",
13121 sym
->name
, &sym
->declared_at
);
13124 /* F2008, C1218. */
13125 if (sym
->attr
.elemental
)
13127 if (sym
->attr
.proc_pointer
)
13129 const char* name
= (sym
->attr
.result
? sym
->ns
->proc_name
->name
13131 gfc_error ("Procedure pointer %qs at %L shall not be elemental",
13132 name
, &sym
->declared_at
);
13135 if (sym
->attr
.dummy
)
13137 gfc_error ("Dummy procedure %qs at %L shall not be elemental",
13138 sym
->name
, &sym
->declared_at
);
13143 /* F2018, C15100: "The result of an elemental function shall be scalar,
13144 and shall not have the POINTER or ALLOCATABLE attribute." The scalar
13145 pointer is tested and caught elsewhere. */
13146 if (sym
->attr
.elemental
&& sym
->result
13147 && (sym
->result
->attr
.allocatable
|| sym
->result
->attr
.pointer
))
13149 gfc_error ("Function result variable %qs at %L of elemental "
13150 "function %qs shall not have an ALLOCATABLE or POINTER "
13151 "attribute", sym
->result
->name
,
13152 &sym
->result
->declared_at
, sym
->name
);
13156 if (sym
->attr
.is_bind_c
&& sym
->attr
.is_c_interop
!= 1)
13158 gfc_formal_arglist
*curr_arg
;
13159 int has_non_interop_arg
= 0;
13161 if (!verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
13162 sym
->common_block
))
13164 /* Clear these to prevent looking at them again if there was an
13166 sym
->attr
.is_bind_c
= 0;
13167 sym
->attr
.is_c_interop
= 0;
13168 sym
->ts
.is_c_interop
= 0;
13172 /* So far, no errors have been found. */
13173 sym
->attr
.is_c_interop
= 1;
13174 sym
->ts
.is_c_interop
= 1;
13177 curr_arg
= gfc_sym_get_dummy_args (sym
);
13178 while (curr_arg
!= NULL
)
13180 /* Skip implicitly typed dummy args here. */
13181 if (curr_arg
->sym
&& curr_arg
->sym
->attr
.implicit_type
== 0)
13182 if (!gfc_verify_c_interop_param (curr_arg
->sym
))
13183 /* If something is found to fail, record the fact so we
13184 can mark the symbol for the procedure as not being
13185 BIND(C) to try and prevent multiple errors being
13187 has_non_interop_arg
= 1;
13189 curr_arg
= curr_arg
->next
;
13192 /* See if any of the arguments were not interoperable and if so, clear
13193 the procedure symbol to prevent duplicate error messages. */
13194 if (has_non_interop_arg
!= 0)
13196 sym
->attr
.is_c_interop
= 0;
13197 sym
->ts
.is_c_interop
= 0;
13198 sym
->attr
.is_bind_c
= 0;
13202 if (!sym
->attr
.proc_pointer
)
13204 if (sym
->attr
.save
== SAVE_EXPLICIT
)
13206 gfc_error ("PROCEDURE attribute conflicts with SAVE attribute "
13207 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13210 if (sym
->attr
.intent
)
13212 gfc_error ("PROCEDURE attribute conflicts with INTENT attribute "
13213 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13216 if (sym
->attr
.subroutine
&& sym
->attr
.result
)
13218 gfc_error ("PROCEDURE attribute conflicts with RESULT attribute "
13219 "in %qs at %L", sym
->ns
->proc_name
->name
, &sym
->declared_at
);
13222 if (sym
->attr
.external
&& sym
->attr
.function
&& !sym
->attr
.module_procedure
13223 && ((sym
->attr
.if_source
== IFSRC_DECL
&& !sym
->attr
.procedure
)
13224 || sym
->attr
.contained
))
13226 gfc_error ("EXTERNAL attribute conflicts with FUNCTION attribute "
13227 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13230 if (strcmp ("ppr@", sym
->name
) == 0)
13232 gfc_error ("Procedure pointer result %qs at %L "
13233 "is missing the pointer attribute",
13234 sym
->ns
->proc_name
->name
, &sym
->declared_at
);
13239 /* Assume that a procedure whose body is not known has references
13240 to external arrays. */
13241 if (sym
->attr
.if_source
!= IFSRC_DECL
)
13242 sym
->attr
.array_outer_dependency
= 1;
13244 /* Compare the characteristics of a module procedure with the
13245 interface declaration. Ideally this would be done with
13246 gfc_compare_interfaces but, at present, the formal interface
13247 cannot be copied to the ts.interface. */
13248 if (sym
->attr
.module_procedure
13249 && sym
->attr
.if_source
== IFSRC_DECL
)
13252 char name
[2*GFC_MAX_SYMBOL_LEN
+ 1];
13254 char *submodule_name
;
13255 strcpy (name
, sym
->ns
->proc_name
->name
);
13256 module_name
= strtok (name
, ".");
13257 submodule_name
= strtok (NULL
, ".");
13259 iface
= sym
->tlink
;
13262 /* Make sure that the result uses the correct charlen for deferred
13264 if (iface
&& sym
->result
13265 && iface
->ts
.type
== BT_CHARACTER
13266 && iface
->ts
.deferred
)
13267 sym
->result
->ts
.u
.cl
= iface
->ts
.u
.cl
;
13272 /* Check the procedure characteristics. */
13273 if (sym
->attr
.elemental
!= iface
->attr
.elemental
)
13275 gfc_error ("Mismatch in ELEMENTAL attribute between MODULE "
13276 "PROCEDURE at %L and its interface in %s",
13277 &sym
->declared_at
, module_name
);
13281 if (sym
->attr
.pure
!= iface
->attr
.pure
)
13283 gfc_error ("Mismatch in PURE attribute between MODULE "
13284 "PROCEDURE at %L and its interface in %s",
13285 &sym
->declared_at
, module_name
);
13289 if (sym
->attr
.recursive
!= iface
->attr
.recursive
)
13291 gfc_error ("Mismatch in RECURSIVE attribute between MODULE "
13292 "PROCEDURE at %L and its interface in %s",
13293 &sym
->declared_at
, module_name
);
13297 /* Check the result characteristics. */
13298 if (!gfc_check_result_characteristics (sym
, iface
, errmsg
, 200))
13300 gfc_error ("%s between the MODULE PROCEDURE declaration "
13301 "in MODULE %qs and the declaration at %L in "
13303 errmsg
, module_name
, &sym
->declared_at
,
13304 submodule_name
? submodule_name
: module_name
);
13309 /* Check the characteristics of the formal arguments. */
13310 if (sym
->formal
&& sym
->formal_ns
)
13312 for (arg
= sym
->formal
; arg
&& arg
->sym
; arg
= arg
->next
)
13315 gfc_traverse_ns (sym
->formal_ns
, compare_fsyms
);
13323 /* Resolve a list of finalizer procedures. That is, after they have hopefully
13324 been defined and we now know their defined arguments, check that they fulfill
13325 the requirements of the standard for procedures used as finalizers. */
13328 gfc_resolve_finalizers (gfc_symbol
* derived
, bool *finalizable
)
13330 gfc_finalizer
* list
;
13331 gfc_finalizer
** prev_link
; /* For removing wrong entries from the list. */
13332 bool result
= true;
13333 bool seen_scalar
= false;
13336 gfc_symbol
*parent
= gfc_get_derived_super_type (derived
);
13339 gfc_resolve_finalizers (parent
, finalizable
);
13341 /* Ensure that derived-type components have a their finalizers resolved. */
13342 bool has_final
= derived
->f2k_derived
&& derived
->f2k_derived
->finalizers
;
13343 for (c
= derived
->components
; c
; c
= c
->next
)
13344 if (c
->ts
.type
== BT_DERIVED
13345 && !c
->attr
.pointer
&& !c
->attr
.proc_pointer
&& !c
->attr
.allocatable
)
13347 bool has_final2
= false;
13348 if (!gfc_resolve_finalizers (c
->ts
.u
.derived
, &has_final2
))
13349 return false; /* Error. */
13350 has_final
= has_final
|| has_final2
;
13352 /* Return early if not finalizable. */
13356 *finalizable
= false;
13360 /* Walk over the list of finalizer-procedures, check them, and if any one
13361 does not fit in with the standard's definition, print an error and remove
13362 it from the list. */
13363 prev_link
= &derived
->f2k_derived
->finalizers
;
13364 for (list
= derived
->f2k_derived
->finalizers
; list
; list
= *prev_link
)
13366 gfc_formal_arglist
*dummy_args
;
13371 /* Skip this finalizer if we already resolved it. */
13372 if (list
->proc_tree
)
13374 if (list
->proc_tree
->n
.sym
->formal
->sym
->as
== NULL
13375 || list
->proc_tree
->n
.sym
->formal
->sym
->as
->rank
== 0)
13376 seen_scalar
= true;
13377 prev_link
= &(list
->next
);
13381 /* Check this exists and is a SUBROUTINE. */
13382 if (!list
->proc_sym
->attr
.subroutine
)
13384 gfc_error ("FINAL procedure %qs at %L is not a SUBROUTINE",
13385 list
->proc_sym
->name
, &list
->where
);
13389 /* We should have exactly one argument. */
13390 dummy_args
= gfc_sym_get_dummy_args (list
->proc_sym
);
13391 if (!dummy_args
|| dummy_args
->next
)
13393 gfc_error ("FINAL procedure at %L must have exactly one argument",
13397 arg
= dummy_args
->sym
;
13399 /* This argument must be of our type. */
13400 if (arg
->ts
.type
!= BT_DERIVED
|| arg
->ts
.u
.derived
!= derived
)
13402 gfc_error ("Argument of FINAL procedure at %L must be of type %qs",
13403 &arg
->declared_at
, derived
->name
);
13407 /* It must neither be a pointer nor allocatable nor optional. */
13408 if (arg
->attr
.pointer
)
13410 gfc_error ("Argument of FINAL procedure at %L must not be a POINTER",
13411 &arg
->declared_at
);
13414 if (arg
->attr
.allocatable
)
13416 gfc_error ("Argument of FINAL procedure at %L must not be"
13417 " ALLOCATABLE", &arg
->declared_at
);
13420 if (arg
->attr
.optional
)
13422 gfc_error ("Argument of FINAL procedure at %L must not be OPTIONAL",
13423 &arg
->declared_at
);
13427 /* It must not be INTENT(OUT). */
13428 if (arg
->attr
.intent
== INTENT_OUT
)
13430 gfc_error ("Argument of FINAL procedure at %L must not be"
13431 " INTENT(OUT)", &arg
->declared_at
);
13435 /* Warn if the procedure is non-scalar and not assumed shape. */
13436 if (warn_surprising
&& arg
->as
&& arg
->as
->rank
!= 0
13437 && arg
->as
->type
!= AS_ASSUMED_SHAPE
)
13438 gfc_warning (OPT_Wsurprising
,
13439 "Non-scalar FINAL procedure at %L should have assumed"
13440 " shape argument", &arg
->declared_at
);
13442 /* Check that it does not match in kind and rank with a FINAL procedure
13443 defined earlier. To really loop over the *earlier* declarations,
13444 we need to walk the tail of the list as new ones were pushed at the
13446 /* TODO: Handle kind parameters once they are implemented. */
13447 my_rank
= (arg
->as
? arg
->as
->rank
: 0);
13448 for (i
= list
->next
; i
; i
= i
->next
)
13450 gfc_formal_arglist
*dummy_args
;
13452 /* Argument list might be empty; that is an error signalled earlier,
13453 but we nevertheless continued resolving. */
13454 dummy_args
= gfc_sym_get_dummy_args (i
->proc_sym
);
13457 gfc_symbol
* i_arg
= dummy_args
->sym
;
13458 const int i_rank
= (i_arg
->as
? i_arg
->as
->rank
: 0);
13459 if (i_rank
== my_rank
)
13461 gfc_error ("FINAL procedure %qs declared at %L has the same"
13462 " rank (%d) as %qs",
13463 list
->proc_sym
->name
, &list
->where
, my_rank
,
13464 i
->proc_sym
->name
);
13470 /* Is this the/a scalar finalizer procedure? */
13472 seen_scalar
= true;
13474 /* Find the symtree for this procedure. */
13475 gcc_assert (!list
->proc_tree
);
13476 list
->proc_tree
= gfc_find_sym_in_symtree (list
->proc_sym
);
13478 prev_link
= &list
->next
;
13481 /* Remove wrong nodes immediately from the list so we don't risk any
13482 troubles in the future when they might fail later expectations. */
13485 *prev_link
= list
->next
;
13486 gfc_free_finalizer (i
);
13490 if (result
== false)
13493 /* Warn if we haven't seen a scalar finalizer procedure (but we know there
13494 were nodes in the list, must have been for arrays. It is surely a good
13495 idea to have a scalar version there if there's something to finalize. */
13496 if (warn_surprising
&& derived
->f2k_derived
->finalizers
&& !seen_scalar
)
13497 gfc_warning (OPT_Wsurprising
,
13498 "Only array FINAL procedures declared for derived type %qs"
13499 " defined at %L, suggest also scalar one",
13500 derived
->name
, &derived
->declared_at
);
13502 vtab
= gfc_find_derived_vtab (derived
);
13503 c
= vtab
->ts
.u
.derived
->components
->next
->next
->next
->next
->next
;
13504 gfc_set_sym_referenced (c
->initializer
->symtree
->n
.sym
);
13507 *finalizable
= true;
13513 /* Check if two GENERIC targets are ambiguous and emit an error is they are. */
13516 check_generic_tbp_ambiguity (gfc_tbp_generic
* t1
, gfc_tbp_generic
* t2
,
13517 const char* generic_name
, locus where
)
13519 gfc_symbol
*sym1
, *sym2
;
13520 const char *pass1
, *pass2
;
13521 gfc_formal_arglist
*dummy_args
;
13523 gcc_assert (t1
->specific
&& t2
->specific
);
13524 gcc_assert (!t1
->specific
->is_generic
);
13525 gcc_assert (!t2
->specific
->is_generic
);
13526 gcc_assert (t1
->is_operator
== t2
->is_operator
);
13528 sym1
= t1
->specific
->u
.specific
->n
.sym
;
13529 sym2
= t2
->specific
->u
.specific
->n
.sym
;
13534 /* Both must be SUBROUTINEs or both must be FUNCTIONs. */
13535 if (sym1
->attr
.subroutine
!= sym2
->attr
.subroutine
13536 || sym1
->attr
.function
!= sym2
->attr
.function
)
13538 gfc_error ("%qs and %qs cannot be mixed FUNCTION/SUBROUTINE for"
13539 " GENERIC %qs at %L",
13540 sym1
->name
, sym2
->name
, generic_name
, &where
);
13544 /* Determine PASS arguments. */
13545 if (t1
->specific
->nopass
)
13547 else if (t1
->specific
->pass_arg
)
13548 pass1
= t1
->specific
->pass_arg
;
13551 dummy_args
= gfc_sym_get_dummy_args (t1
->specific
->u
.specific
->n
.sym
);
13553 pass1
= dummy_args
->sym
->name
;
13557 if (t2
->specific
->nopass
)
13559 else if (t2
->specific
->pass_arg
)
13560 pass2
= t2
->specific
->pass_arg
;
13563 dummy_args
= gfc_sym_get_dummy_args (t2
->specific
->u
.specific
->n
.sym
);
13565 pass2
= dummy_args
->sym
->name
;
13570 /* Compare the interfaces. */
13571 if (gfc_compare_interfaces (sym1
, sym2
, sym2
->name
, !t1
->is_operator
, 0,
13572 NULL
, 0, pass1
, pass2
))
13574 gfc_error ("%qs and %qs for GENERIC %qs at %L are ambiguous",
13575 sym1
->name
, sym2
->name
, generic_name
, &where
);
13583 /* Worker function for resolving a generic procedure binding; this is used to
13584 resolve GENERIC as well as user and intrinsic OPERATOR typebound procedures.
13586 The difference between those cases is finding possible inherited bindings
13587 that are overridden, as one has to look for them in tb_sym_root,
13588 tb_uop_root or tb_op, respectively. Thus the caller must already find
13589 the super-type and set p->overridden correctly. */
13592 resolve_tb_generic_targets (gfc_symbol
* super_type
,
13593 gfc_typebound_proc
* p
, const char* name
)
13595 gfc_tbp_generic
* target
;
13596 gfc_symtree
* first_target
;
13597 gfc_symtree
* inherited
;
13599 gcc_assert (p
&& p
->is_generic
);
13601 /* Try to find the specific bindings for the symtrees in our target-list. */
13602 gcc_assert (p
->u
.generic
);
13603 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13604 if (!target
->specific
)
13606 gfc_typebound_proc
* overridden_tbp
;
13607 gfc_tbp_generic
* g
;
13608 const char* target_name
;
13610 target_name
= target
->specific_st
->name
;
13612 /* Defined for this type directly. */
13613 if (target
->specific_st
->n
.tb
&& !target
->specific_st
->n
.tb
->error
)
13615 target
->specific
= target
->specific_st
->n
.tb
;
13616 goto specific_found
;
13619 /* Look for an inherited specific binding. */
13622 inherited
= gfc_find_typebound_proc (super_type
, NULL
, target_name
,
13627 gcc_assert (inherited
->n
.tb
);
13628 target
->specific
= inherited
->n
.tb
;
13629 goto specific_found
;
13633 gfc_error ("Undefined specific binding %qs as target of GENERIC %qs"
13634 " at %L", target_name
, name
, &p
->where
);
13637 /* Once we've found the specific binding, check it is not ambiguous with
13638 other specifics already found or inherited for the same GENERIC. */
13640 gcc_assert (target
->specific
);
13642 /* This must really be a specific binding! */
13643 if (target
->specific
->is_generic
)
13645 gfc_error ("GENERIC %qs at %L must target a specific binding,"
13646 " %qs is GENERIC, too", name
, &p
->where
, target_name
);
13650 /* Check those already resolved on this type directly. */
13651 for (g
= p
->u
.generic
; g
; g
= g
->next
)
13652 if (g
!= target
&& g
->specific
13653 && !check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13656 /* Check for ambiguity with inherited specific targets. */
13657 for (overridden_tbp
= p
->overridden
; overridden_tbp
;
13658 overridden_tbp
= overridden_tbp
->overridden
)
13659 if (overridden_tbp
->is_generic
)
13661 for (g
= overridden_tbp
->u
.generic
; g
; g
= g
->next
)
13663 gcc_assert (g
->specific
);
13664 if (!check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13670 /* If we attempt to "overwrite" a specific binding, this is an error. */
13671 if (p
->overridden
&& !p
->overridden
->is_generic
)
13673 gfc_error ("GENERIC %qs at %L cannot overwrite specific binding with"
13674 " the same name", name
, &p
->where
);
13678 /* Take the SUBROUTINE/FUNCTION attributes of the first specific target, as
13679 all must have the same attributes here. */
13680 first_target
= p
->u
.generic
->specific
->u
.specific
;
13681 gcc_assert (first_target
);
13682 p
->subroutine
= first_target
->n
.sym
->attr
.subroutine
;
13683 p
->function
= first_target
->n
.sym
->attr
.function
;
13689 /* Resolve a GENERIC procedure binding for a derived type. */
13692 resolve_typebound_generic (gfc_symbol
* derived
, gfc_symtree
* st
)
13694 gfc_symbol
* super_type
;
13696 /* Find the overridden binding if any. */
13697 st
->n
.tb
->overridden
= NULL
;
13698 super_type
= gfc_get_derived_super_type (derived
);
13701 gfc_symtree
* overridden
;
13702 overridden
= gfc_find_typebound_proc (super_type
, NULL
, st
->name
,
13705 if (overridden
&& overridden
->n
.tb
)
13706 st
->n
.tb
->overridden
= overridden
->n
.tb
;
13709 /* Resolve using worker function. */
13710 return resolve_tb_generic_targets (super_type
, st
->n
.tb
, st
->name
);
13714 /* Retrieve the target-procedure of an operator binding and do some checks in
13715 common for intrinsic and user-defined type-bound operators. */
13718 get_checked_tb_operator_target (gfc_tbp_generic
* target
, locus where
)
13720 gfc_symbol
* target_proc
;
13722 gcc_assert (target
->specific
&& !target
->specific
->is_generic
);
13723 target_proc
= target
->specific
->u
.specific
->n
.sym
;
13724 gcc_assert (target_proc
);
13726 /* F08:C468. All operator bindings must have a passed-object dummy argument. */
13727 if (target
->specific
->nopass
)
13729 gfc_error ("Type-bound operator at %L cannot be NOPASS", &where
);
13733 return target_proc
;
13737 /* Resolve a type-bound intrinsic operator. */
13740 resolve_typebound_intrinsic_op (gfc_symbol
* derived
, gfc_intrinsic_op op
,
13741 gfc_typebound_proc
* p
)
13743 gfc_symbol
* super_type
;
13744 gfc_tbp_generic
* target
;
13746 /* If there's already an error here, do nothing (but don't fail again). */
13750 /* Operators should always be GENERIC bindings. */
13751 gcc_assert (p
->is_generic
);
13753 /* Look for an overridden binding. */
13754 super_type
= gfc_get_derived_super_type (derived
);
13755 if (super_type
&& super_type
->f2k_derived
)
13756 p
->overridden
= gfc_find_typebound_intrinsic_op (super_type
, NULL
,
13759 p
->overridden
= NULL
;
13761 /* Resolve general GENERIC properties using worker function. */
13762 if (!resolve_tb_generic_targets (super_type
, p
, gfc_op2string(op
)))
13765 /* Check the targets to be procedures of correct interface. */
13766 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13768 gfc_symbol
* target_proc
;
13770 target_proc
= get_checked_tb_operator_target (target
, p
->where
);
13774 if (!gfc_check_operator_interface (target_proc
, op
, p
->where
))
13777 /* Add target to non-typebound operator list. */
13778 if (!target
->specific
->deferred
&& !derived
->attr
.use_assoc
13779 && p
->access
!= ACCESS_PRIVATE
&& derived
->ns
== gfc_current_ns
)
13781 gfc_interface
*head
, *intr
;
13783 /* Preempt 'gfc_check_new_interface' for submodules, where the
13784 mechanism for handling module procedures winds up resolving
13785 operator interfaces twice and would otherwise cause an error. */
13786 for (intr
= derived
->ns
->op
[op
]; intr
; intr
= intr
->next
)
13787 if (intr
->sym
== target_proc
13788 && target_proc
->attr
.used_in_submodule
)
13791 if (!gfc_check_new_interface (derived
->ns
->op
[op
],
13792 target_proc
, p
->where
))
13794 head
= derived
->ns
->op
[op
];
13795 intr
= gfc_get_interface ();
13796 intr
->sym
= target_proc
;
13797 intr
->where
= p
->where
;
13799 derived
->ns
->op
[op
] = intr
;
13811 /* Resolve a type-bound user operator (tree-walker callback). */
13813 static gfc_symbol
* resolve_bindings_derived
;
13814 static bool resolve_bindings_result
;
13816 static bool check_uop_procedure (gfc_symbol
* sym
, locus where
);
13819 resolve_typebound_user_op (gfc_symtree
* stree
)
13821 gfc_symbol
* super_type
;
13822 gfc_tbp_generic
* target
;
13824 gcc_assert (stree
&& stree
->n
.tb
);
13826 if (stree
->n
.tb
->error
)
13829 /* Operators should always be GENERIC bindings. */
13830 gcc_assert (stree
->n
.tb
->is_generic
);
13832 /* Find overridden procedure, if any. */
13833 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13834 if (super_type
&& super_type
->f2k_derived
)
13836 gfc_symtree
* overridden
;
13837 overridden
= gfc_find_typebound_user_op (super_type
, NULL
,
13838 stree
->name
, true, NULL
);
13840 if (overridden
&& overridden
->n
.tb
)
13841 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13844 stree
->n
.tb
->overridden
= NULL
;
13846 /* Resolve basically using worker function. */
13847 if (!resolve_tb_generic_targets (super_type
, stree
->n
.tb
, stree
->name
))
13850 /* Check the targets to be functions of correct interface. */
13851 for (target
= stree
->n
.tb
->u
.generic
; target
; target
= target
->next
)
13853 gfc_symbol
* target_proc
;
13855 target_proc
= get_checked_tb_operator_target (target
, stree
->n
.tb
->where
);
13859 if (!check_uop_procedure (target_proc
, stree
->n
.tb
->where
))
13866 resolve_bindings_result
= false;
13867 stree
->n
.tb
->error
= 1;
13871 /* Resolve the type-bound procedures for a derived type. */
13874 resolve_typebound_procedure (gfc_symtree
* stree
)
13878 gfc_symbol
* me_arg
;
13879 gfc_symbol
* super_type
;
13880 gfc_component
* comp
;
13882 gcc_assert (stree
);
13884 /* Undefined specific symbol from GENERIC target definition. */
13888 if (stree
->n
.tb
->error
)
13891 /* If this is a GENERIC binding, use that routine. */
13892 if (stree
->n
.tb
->is_generic
)
13894 if (!resolve_typebound_generic (resolve_bindings_derived
, stree
))
13899 /* Get the target-procedure to check it. */
13900 gcc_assert (!stree
->n
.tb
->is_generic
);
13901 gcc_assert (stree
->n
.tb
->u
.specific
);
13902 proc
= stree
->n
.tb
->u
.specific
->n
.sym
;
13903 where
= stree
->n
.tb
->where
;
13905 /* Default access should already be resolved from the parser. */
13906 gcc_assert (stree
->n
.tb
->access
!= ACCESS_UNKNOWN
);
13908 if (stree
->n
.tb
->deferred
)
13910 if (!check_proc_interface (proc
, &where
))
13915 /* If proc has not been resolved at this point, proc->name may
13916 actually be a USE associated entity. See PR fortran/89647. */
13917 if (!proc
->resolve_symbol_called
13918 && proc
->attr
.function
== 0 && proc
->attr
.subroutine
== 0)
13921 gfc_find_symbol (proc
->name
, gfc_current_ns
->parent
, 1, &tmp
);
13922 if (tmp
&& tmp
->attr
.use_assoc
)
13924 proc
->module
= tmp
->module
;
13925 proc
->attr
.proc
= tmp
->attr
.proc
;
13926 proc
->attr
.function
= tmp
->attr
.function
;
13927 proc
->attr
.subroutine
= tmp
->attr
.subroutine
;
13928 proc
->attr
.use_assoc
= tmp
->attr
.use_assoc
;
13929 proc
->ts
= tmp
->ts
;
13930 proc
->result
= tmp
->result
;
13934 /* Check for F08:C465. */
13935 if ((!proc
->attr
.subroutine
&& !proc
->attr
.function
)
13936 || (proc
->attr
.proc
!= PROC_MODULE
13937 && proc
->attr
.if_source
!= IFSRC_IFBODY
)
13938 || proc
->attr
.abstract
)
13940 gfc_error ("%qs must be a module procedure or an external "
13941 "procedure with an explicit interface at %L",
13942 proc
->name
, &where
);
13947 stree
->n
.tb
->subroutine
= proc
->attr
.subroutine
;
13948 stree
->n
.tb
->function
= proc
->attr
.function
;
13950 /* Find the super-type of the current derived type. We could do this once and
13951 store in a global if speed is needed, but as long as not I believe this is
13952 more readable and clearer. */
13953 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13955 /* If PASS, resolve and check arguments if not already resolved / loaded
13956 from a .mod file. */
13957 if (!stree
->n
.tb
->nopass
&& stree
->n
.tb
->pass_arg_num
== 0)
13959 gfc_formal_arglist
*dummy_args
;
13961 dummy_args
= gfc_sym_get_dummy_args (proc
);
13962 if (stree
->n
.tb
->pass_arg
)
13964 gfc_formal_arglist
*i
;
13966 /* If an explicit passing argument name is given, walk the arg-list
13967 and look for it. */
13970 stree
->n
.tb
->pass_arg_num
= 1;
13971 for (i
= dummy_args
; i
; i
= i
->next
)
13973 if (!strcmp (i
->sym
->name
, stree
->n
.tb
->pass_arg
))
13978 ++stree
->n
.tb
->pass_arg_num
;
13983 gfc_error ("Procedure %qs with PASS(%s) at %L has no"
13985 proc
->name
, stree
->n
.tb
->pass_arg
, &where
,
13986 stree
->n
.tb
->pass_arg
);
13992 /* Otherwise, take the first one; there should in fact be at least
13994 stree
->n
.tb
->pass_arg_num
= 1;
13997 gfc_error ("Procedure %qs with PASS at %L must have at"
13998 " least one argument", proc
->name
, &where
);
14001 me_arg
= dummy_args
->sym
;
14004 /* Now check that the argument-type matches and the passed-object
14005 dummy argument is generally fine. */
14007 gcc_assert (me_arg
);
14009 if (me_arg
->ts
.type
!= BT_CLASS
)
14011 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
14012 " at %L", proc
->name
, &where
);
14016 if (CLASS_DATA (me_arg
)->ts
.u
.derived
14017 != resolve_bindings_derived
)
14019 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
14020 " the derived-type %qs", me_arg
->name
, proc
->name
,
14021 me_arg
->name
, &where
, resolve_bindings_derived
->name
);
14025 gcc_assert (me_arg
->ts
.type
== BT_CLASS
);
14026 if (CLASS_DATA (me_arg
)->as
&& CLASS_DATA (me_arg
)->as
->rank
!= 0)
14028 gfc_error ("Passed-object dummy argument of %qs at %L must be"
14029 " scalar", proc
->name
, &where
);
14032 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
14034 gfc_error ("Passed-object dummy argument of %qs at %L must not"
14035 " be ALLOCATABLE", proc
->name
, &where
);
14038 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
14040 gfc_error ("Passed-object dummy argument of %qs at %L must not"
14041 " be POINTER", proc
->name
, &where
);
14046 /* If we are extending some type, check that we don't override a procedure
14047 flagged NON_OVERRIDABLE. */
14048 stree
->n
.tb
->overridden
= NULL
;
14051 gfc_symtree
* overridden
;
14052 overridden
= gfc_find_typebound_proc (super_type
, NULL
,
14053 stree
->name
, true, NULL
);
14057 if (overridden
->n
.tb
)
14058 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
14060 if (!gfc_check_typebound_override (stree
, overridden
))
14065 /* See if there's a name collision with a component directly in this type. */
14066 for (comp
= resolve_bindings_derived
->components
; comp
; comp
= comp
->next
)
14067 if (!strcmp (comp
->name
, stree
->name
))
14069 gfc_error ("Procedure %qs at %L has the same name as a component of"
14071 stree
->name
, &where
, resolve_bindings_derived
->name
);
14075 /* Try to find a name collision with an inherited component. */
14076 if (super_type
&& gfc_find_component (super_type
, stree
->name
, true, true,
14079 gfc_error ("Procedure %qs at %L has the same name as an inherited"
14080 " component of %qs",
14081 stree
->name
, &where
, resolve_bindings_derived
->name
);
14085 stree
->n
.tb
->error
= 0;
14089 resolve_bindings_result
= false;
14090 stree
->n
.tb
->error
= 1;
14095 resolve_typebound_procedures (gfc_symbol
* derived
)
14098 gfc_symbol
* super_type
;
14100 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->tb_sym_root
)
14103 super_type
= gfc_get_derived_super_type (derived
);
14105 resolve_symbol (super_type
);
14107 resolve_bindings_derived
= derived
;
14108 resolve_bindings_result
= true;
14110 if (derived
->f2k_derived
->tb_sym_root
)
14111 gfc_traverse_symtree (derived
->f2k_derived
->tb_sym_root
,
14112 &resolve_typebound_procedure
);
14114 if (derived
->f2k_derived
->tb_uop_root
)
14115 gfc_traverse_symtree (derived
->f2k_derived
->tb_uop_root
,
14116 &resolve_typebound_user_op
);
14118 for (op
= 0; op
!= GFC_INTRINSIC_OPS
; ++op
)
14120 gfc_typebound_proc
* p
= derived
->f2k_derived
->tb_op
[op
];
14121 if (p
&& !resolve_typebound_intrinsic_op (derived
,
14122 (gfc_intrinsic_op
)op
, p
))
14123 resolve_bindings_result
= false;
14126 return resolve_bindings_result
;
14130 /* Add a derived type to the dt_list. The dt_list is used in trans-types.c
14131 to give all identical derived types the same backend_decl. */
14133 add_dt_to_dt_list (gfc_symbol
*derived
)
14135 if (!derived
->dt_next
)
14137 if (gfc_derived_types
)
14139 derived
->dt_next
= gfc_derived_types
->dt_next
;
14140 gfc_derived_types
->dt_next
= derived
;
14144 derived
->dt_next
= derived
;
14146 gfc_derived_types
= derived
;
14151 /* Ensure that a derived-type is really not abstract, meaning that every
14152 inherited DEFERRED binding is overridden by a non-DEFERRED one. */
14155 ensure_not_abstract_walker (gfc_symbol
* sub
, gfc_symtree
* st
)
14160 if (!ensure_not_abstract_walker (sub
, st
->left
))
14162 if (!ensure_not_abstract_walker (sub
, st
->right
))
14165 if (st
->n
.tb
&& st
->n
.tb
->deferred
)
14167 gfc_symtree
* overriding
;
14168 overriding
= gfc_find_typebound_proc (sub
, NULL
, st
->name
, true, NULL
);
14171 gcc_assert (overriding
->n
.tb
);
14172 if (overriding
->n
.tb
->deferred
)
14174 gfc_error ("Derived-type %qs declared at %L must be ABSTRACT because"
14175 " %qs is DEFERRED and not overridden",
14176 sub
->name
, &sub
->declared_at
, st
->name
);
14185 ensure_not_abstract (gfc_symbol
* sub
, gfc_symbol
* ancestor
)
14187 /* The algorithm used here is to recursively travel up the ancestry of sub
14188 and for each ancestor-type, check all bindings. If any of them is
14189 DEFERRED, look it up starting from sub and see if the found (overriding)
14190 binding is not DEFERRED.
14191 This is not the most efficient way to do this, but it should be ok and is
14192 clearer than something sophisticated. */
14194 gcc_assert (ancestor
&& !sub
->attr
.abstract
);
14196 if (!ancestor
->attr
.abstract
)
14199 /* Walk bindings of this ancestor. */
14200 if (ancestor
->f2k_derived
)
14203 t
= ensure_not_abstract_walker (sub
, ancestor
->f2k_derived
->tb_sym_root
);
14208 /* Find next ancestor type and recurse on it. */
14209 ancestor
= gfc_get_derived_super_type (ancestor
);
14211 return ensure_not_abstract (sub
, ancestor
);
14217 /* This check for typebound defined assignments is done recursively
14218 since the order in which derived types are resolved is not always in
14219 order of the declarations. */
14222 check_defined_assignments (gfc_symbol
*derived
)
14226 for (c
= derived
->components
; c
; c
= c
->next
)
14228 if (!gfc_bt_struct (c
->ts
.type
)
14230 || c
->attr
.allocatable
14231 || c
->attr
.proc_pointer_comp
14232 || c
->attr
.class_pointer
14233 || c
->attr
.proc_pointer
)
14236 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
14237 || (c
->ts
.u
.derived
->f2k_derived
14238 && c
->ts
.u
.derived
->f2k_derived
->tb_op
[INTRINSIC_ASSIGN
]))
14240 derived
->attr
.defined_assign_comp
= 1;
14244 check_defined_assignments (c
->ts
.u
.derived
);
14245 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
14247 derived
->attr
.defined_assign_comp
= 1;
14254 /* Resolve a single component of a derived type or structure. */
14257 resolve_component (gfc_component
*c
, gfc_symbol
*sym
)
14259 gfc_symbol
*super_type
;
14260 symbol_attribute
*attr
;
14262 if (c
->attr
.artificial
)
14265 /* Do not allow vtype components to be resolved in nameless namespaces
14266 such as block data because the procedure pointers will cause ICEs
14267 and vtables are not needed in these contexts. */
14268 if (sym
->attr
.vtype
&& sym
->attr
.use_assoc
14269 && sym
->ns
->proc_name
== NULL
)
14273 if ((!sym
->attr
.is_class
|| c
!= sym
->components
)
14274 && c
->attr
.codimension
14275 && (!c
->attr
.allocatable
|| (c
->as
&& c
->as
->type
!= AS_DEFERRED
)))
14277 gfc_error ("Coarray component %qs at %L must be allocatable with "
14278 "deferred shape", c
->name
, &c
->loc
);
14283 if (c
->attr
.codimension
&& c
->ts
.type
== BT_DERIVED
14284 && c
->ts
.u
.derived
->ts
.is_iso_c
)
14286 gfc_error ("Component %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
14287 "shall not be a coarray", c
->name
, &c
->loc
);
14292 if (gfc_bt_struct (c
->ts
.type
) && c
->ts
.u
.derived
->attr
.coarray_comp
14293 && (c
->attr
.codimension
|| c
->attr
.pointer
|| c
->attr
.dimension
14294 || c
->attr
.allocatable
))
14296 gfc_error ("Component %qs at %L with coarray component "
14297 "shall be a nonpointer, nonallocatable scalar",
14303 if (c
->ts
.type
== BT_CLASS
)
14305 if (CLASS_DATA (c
))
14307 attr
= &(CLASS_DATA (c
)->attr
);
14309 /* Fix up contiguous attribute. */
14310 if (c
->attr
.contiguous
)
14311 attr
->contiguous
= 1;
14319 if (attr
&& attr
->contiguous
&& (!attr
->dimension
|| !attr
->pointer
))
14321 gfc_error ("Component %qs at %L has the CONTIGUOUS attribute but "
14322 "is not an array pointer", c
->name
, &c
->loc
);
14326 /* F2003, 15.2.1 - length has to be one. */
14327 if (sym
->attr
.is_bind_c
&& c
->ts
.type
== BT_CHARACTER
14328 && (c
->ts
.u
.cl
== NULL
|| c
->ts
.u
.cl
->length
== NULL
14329 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
)
14330 || mpz_cmp_si (c
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
14332 gfc_error ("Component %qs of BIND(C) type at %L must have length one",
14337 if (c
->attr
.proc_pointer
&& c
->ts
.interface
)
14339 gfc_symbol
*ifc
= c
->ts
.interface
;
14341 if (!sym
->attr
.vtype
&& !check_proc_interface (ifc
, &c
->loc
))
14347 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
14349 /* Resolve interface and copy attributes. */
14350 if (ifc
->formal
&& !ifc
->formal_ns
)
14351 resolve_symbol (ifc
);
14352 if (ifc
->attr
.intrinsic
)
14353 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
14357 c
->ts
= ifc
->result
->ts
;
14358 c
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
14359 c
->attr
.pointer
= ifc
->result
->attr
.pointer
;
14360 c
->attr
.dimension
= ifc
->result
->attr
.dimension
;
14361 c
->as
= gfc_copy_array_spec (ifc
->result
->as
);
14362 c
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
14367 c
->attr
.allocatable
= ifc
->attr
.allocatable
;
14368 c
->attr
.pointer
= ifc
->attr
.pointer
;
14369 c
->attr
.dimension
= ifc
->attr
.dimension
;
14370 c
->as
= gfc_copy_array_spec (ifc
->as
);
14371 c
->attr
.class_ok
= ifc
->attr
.class_ok
;
14373 c
->ts
.interface
= ifc
;
14374 c
->attr
.function
= ifc
->attr
.function
;
14375 c
->attr
.subroutine
= ifc
->attr
.subroutine
;
14377 c
->attr
.pure
= ifc
->attr
.pure
;
14378 c
->attr
.elemental
= ifc
->attr
.elemental
;
14379 c
->attr
.recursive
= ifc
->attr
.recursive
;
14380 c
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
14381 c
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
14382 /* Copy char length. */
14383 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
14385 gfc_charlen
*cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
14386 if (cl
->length
&& !cl
->resolved
14387 && !gfc_resolve_expr (cl
->length
))
14396 else if (c
->attr
.proc_pointer
&& c
->ts
.type
== BT_UNKNOWN
)
14398 /* Since PPCs are not implicitly typed, a PPC without an explicit
14399 interface must be a subroutine. */
14400 gfc_add_subroutine (&c
->attr
, c
->name
, &c
->loc
);
14403 /* Procedure pointer components: Check PASS arg. */
14404 if (c
->attr
.proc_pointer
&& !c
->tb
->nopass
&& c
->tb
->pass_arg_num
== 0
14405 && !sym
->attr
.vtype
)
14407 gfc_symbol
* me_arg
;
14409 if (c
->tb
->pass_arg
)
14411 gfc_formal_arglist
* i
;
14413 /* If an explicit passing argument name is given, walk the arg-list
14414 and look for it. */
14417 c
->tb
->pass_arg_num
= 1;
14418 for (i
= c
->ts
.interface
->formal
; i
; i
= i
->next
)
14420 if (!strcmp (i
->sym
->name
, c
->tb
->pass_arg
))
14425 c
->tb
->pass_arg_num
++;
14430 gfc_error ("Procedure pointer component %qs with PASS(%s) "
14431 "at %L has no argument %qs", c
->name
,
14432 c
->tb
->pass_arg
, &c
->loc
, c
->tb
->pass_arg
);
14439 /* Otherwise, take the first one; there should in fact be at least
14441 c
->tb
->pass_arg_num
= 1;
14442 if (!c
->ts
.interface
->formal
)
14444 gfc_error ("Procedure pointer component %qs with PASS at %L "
14445 "must have at least one argument",
14450 me_arg
= c
->ts
.interface
->formal
->sym
;
14453 /* Now check that the argument-type matches. */
14454 gcc_assert (me_arg
);
14455 if ((me_arg
->ts
.type
!= BT_DERIVED
&& me_arg
->ts
.type
!= BT_CLASS
)
14456 || (me_arg
->ts
.type
== BT_DERIVED
&& me_arg
->ts
.u
.derived
!= sym
)
14457 || (me_arg
->ts
.type
== BT_CLASS
14458 && CLASS_DATA (me_arg
)->ts
.u
.derived
!= sym
))
14460 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
14461 " the derived type %qs", me_arg
->name
, c
->name
,
14462 me_arg
->name
, &c
->loc
, sym
->name
);
14467 /* Check for F03:C453. */
14468 if (CLASS_DATA (me_arg
)->attr
.dimension
)
14470 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14471 "must be scalar", me_arg
->name
, c
->name
, me_arg
->name
,
14477 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
14479 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14480 "may not have the POINTER attribute", me_arg
->name
,
14481 c
->name
, me_arg
->name
, &c
->loc
);
14486 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
14488 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14489 "may not be ALLOCATABLE", me_arg
->name
, c
->name
,
14490 me_arg
->name
, &c
->loc
);
14495 if (gfc_type_is_extensible (sym
) && me_arg
->ts
.type
!= BT_CLASS
)
14497 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
14498 " at %L", c
->name
, &c
->loc
);
14504 /* Check type-spec if this is not the parent-type component. */
14505 if (((sym
->attr
.is_class
14506 && (!sym
->components
->ts
.u
.derived
->attr
.extension
14507 || c
!= sym
->components
->ts
.u
.derived
->components
))
14508 || (!sym
->attr
.is_class
14509 && (!sym
->attr
.extension
|| c
!= sym
->components
)))
14510 && !sym
->attr
.vtype
14511 && !resolve_typespec_used (&c
->ts
, &c
->loc
, c
->name
))
14514 super_type
= gfc_get_derived_super_type (sym
);
14516 /* If this type is an extension, set the accessibility of the parent
14519 && ((sym
->attr
.is_class
14520 && c
== sym
->components
->ts
.u
.derived
->components
)
14521 || (!sym
->attr
.is_class
&& c
== sym
->components
))
14522 && strcmp (super_type
->name
, c
->name
) == 0)
14523 c
->attr
.access
= super_type
->attr
.access
;
14525 /* If this type is an extension, see if this component has the same name
14526 as an inherited type-bound procedure. */
14527 if (super_type
&& !sym
->attr
.is_class
14528 && gfc_find_typebound_proc (super_type
, NULL
, c
->name
, true, NULL
))
14530 gfc_error ("Component %qs of %qs at %L has the same name as an"
14531 " inherited type-bound procedure",
14532 c
->name
, sym
->name
, &c
->loc
);
14536 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.proc_pointer
14537 && !c
->ts
.deferred
)
14539 if (c
->ts
.u
.cl
->length
== NULL
14540 || (!resolve_charlen(c
->ts
.u
.cl
))
14541 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
))
14543 gfc_error ("Character length of component %qs needs to "
14544 "be a constant specification expression at %L",
14546 c
->ts
.u
.cl
->length
? &c
->ts
.u
.cl
->length
->where
: &c
->loc
);
14551 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.deferred
14552 && !c
->attr
.pointer
&& !c
->attr
.allocatable
)
14554 gfc_error ("Character component %qs of %qs at %L with deferred "
14555 "length must be a POINTER or ALLOCATABLE",
14556 c
->name
, sym
->name
, &c
->loc
);
14560 /* Add the hidden deferred length field. */
14561 if (c
->ts
.type
== BT_CHARACTER
14562 && (c
->ts
.deferred
|| c
->attr
.pdt_string
)
14563 && !c
->attr
.function
14564 && !sym
->attr
.is_class
)
14566 char name
[GFC_MAX_SYMBOL_LEN
+9];
14567 gfc_component
*strlen
;
14568 sprintf (name
, "_%s_length", c
->name
);
14569 strlen
= gfc_find_component (sym
, name
, true, true, NULL
);
14570 if (strlen
== NULL
)
14572 if (!gfc_add_component (sym
, name
, &strlen
))
14574 strlen
->ts
.type
= BT_INTEGER
;
14575 strlen
->ts
.kind
= gfc_charlen_int_kind
;
14576 strlen
->attr
.access
= ACCESS_PRIVATE
;
14577 strlen
->attr
.artificial
= 1;
14581 if (c
->ts
.type
== BT_DERIVED
14582 && sym
->component_access
!= ACCESS_PRIVATE
14583 && gfc_check_symbol_access (sym
)
14584 && !is_sym_host_assoc (c
->ts
.u
.derived
, sym
->ns
)
14585 && !c
->ts
.u
.derived
->attr
.use_assoc
14586 && !gfc_check_symbol_access (c
->ts
.u
.derived
)
14587 && !gfc_notify_std (GFC_STD_F2003
, "the component %qs is a "
14588 "PRIVATE type and cannot be a component of "
14589 "%qs, which is PUBLIC at %L", c
->name
,
14590 sym
->name
, &sym
->declared_at
))
14593 if ((sym
->attr
.sequence
|| sym
->attr
.is_bind_c
) && c
->ts
.type
== BT_CLASS
)
14595 gfc_error ("Polymorphic component %s at %L in SEQUENCE or BIND(C) "
14596 "type %s", c
->name
, &c
->loc
, sym
->name
);
14600 if (sym
->attr
.sequence
)
14602 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.sequence
== 0)
14604 gfc_error ("Component %s of SEQUENCE type declared at %L does "
14605 "not have the SEQUENCE attribute",
14606 c
->ts
.u
.derived
->name
, &sym
->declared_at
);
14611 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.generic
)
14612 c
->ts
.u
.derived
= gfc_find_dt_in_generic (c
->ts
.u
.derived
);
14613 else if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
14614 && CLASS_DATA (c
)->ts
.u
.derived
->attr
.generic
)
14615 CLASS_DATA (c
)->ts
.u
.derived
14616 = gfc_find_dt_in_generic (CLASS_DATA (c
)->ts
.u
.derived
);
14618 /* If an allocatable component derived type is of the same type as
14619 the enclosing derived type, we need a vtable generating so that
14620 the __deallocate procedure is created. */
14621 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
14622 && c
->ts
.u
.derived
== sym
&& c
->attr
.allocatable
== 1)
14623 gfc_find_vtab (&c
->ts
);
14625 /* Ensure that all the derived type components are put on the
14626 derived type list; even in formal namespaces, where derived type
14627 pointer components might not have been declared. */
14628 if (c
->ts
.type
== BT_DERIVED
14630 && c
->ts
.u
.derived
->components
14632 && sym
!= c
->ts
.u
.derived
)
14633 add_dt_to_dt_list (c
->ts
.u
.derived
);
14635 if (!gfc_resolve_array_spec (c
->as
,
14636 !(c
->attr
.pointer
|| c
->attr
.proc_pointer
14637 || c
->attr
.allocatable
)))
14640 if (c
->initializer
&& !sym
->attr
.vtype
14641 && !c
->attr
.pdt_kind
&& !c
->attr
.pdt_len
14642 && !gfc_check_assign_symbol (sym
, c
, c
->initializer
))
14649 /* Be nice about the locus for a structure expression - show the locus of the
14650 first non-null sub-expression if we can. */
14653 cons_where (gfc_expr
*struct_expr
)
14655 gfc_constructor
*cons
;
14657 gcc_assert (struct_expr
&& struct_expr
->expr_type
== EXPR_STRUCTURE
);
14659 cons
= gfc_constructor_first (struct_expr
->value
.constructor
);
14660 for (; cons
; cons
= gfc_constructor_next (cons
))
14662 if (cons
->expr
&& cons
->expr
->expr_type
!= EXPR_NULL
)
14663 return &cons
->expr
->where
;
14666 return &struct_expr
->where
;
14669 /* Resolve the components of a structure type. Much less work than derived
14673 resolve_fl_struct (gfc_symbol
*sym
)
14676 gfc_expr
*init
= NULL
;
14679 /* Make sure UNIONs do not have overlapping initializers. */
14680 if (sym
->attr
.flavor
== FL_UNION
)
14682 for (c
= sym
->components
; c
; c
= c
->next
)
14684 if (init
&& c
->initializer
)
14686 gfc_error ("Conflicting initializers in union at %L and %L",
14687 cons_where (init
), cons_where (c
->initializer
));
14688 gfc_free_expr (c
->initializer
);
14689 c
->initializer
= NULL
;
14692 init
= c
->initializer
;
14697 for (c
= sym
->components
; c
; c
= c
->next
)
14698 if (!resolve_component (c
, sym
))
14704 if (sym
->components
)
14705 add_dt_to_dt_list (sym
);
14711 /* Resolve the components of a derived type. This does not have to wait until
14712 resolution stage, but can be done as soon as the dt declaration has been
14716 resolve_fl_derived0 (gfc_symbol
*sym
)
14718 gfc_symbol
* super_type
;
14720 gfc_formal_arglist
*f
;
14723 if (sym
->attr
.unlimited_polymorphic
)
14726 super_type
= gfc_get_derived_super_type (sym
);
14729 if (super_type
&& sym
->attr
.coarray_comp
&& !super_type
->attr
.coarray_comp
)
14731 gfc_error ("As extending type %qs at %L has a coarray component, "
14732 "parent type %qs shall also have one", sym
->name
,
14733 &sym
->declared_at
, super_type
->name
);
14737 /* Ensure the extended type gets resolved before we do. */
14738 if (super_type
&& !resolve_fl_derived0 (super_type
))
14741 /* An ABSTRACT type must be extensible. */
14742 if (sym
->attr
.abstract
&& !gfc_type_is_extensible (sym
))
14744 gfc_error ("Non-extensible derived-type %qs at %L must not be ABSTRACT",
14745 sym
->name
, &sym
->declared_at
);
14749 c
= (sym
->attr
.is_class
) ? sym
->components
->ts
.u
.derived
->components
14753 for ( ; c
!= NULL
; c
= c
->next
)
14754 if (!resolve_component (c
, sym
))
14760 /* Now add the caf token field, where needed. */
14761 if (flag_coarray
!= GFC_FCOARRAY_NONE
14762 && !sym
->attr
.is_class
&& !sym
->attr
.vtype
)
14764 for (c
= sym
->components
; c
; c
= c
->next
)
14765 if (!c
->attr
.dimension
&& !c
->attr
.codimension
14766 && (c
->attr
.allocatable
|| c
->attr
.pointer
))
14768 char name
[GFC_MAX_SYMBOL_LEN
+9];
14769 gfc_component
*token
;
14770 sprintf (name
, "_caf_%s", c
->name
);
14771 token
= gfc_find_component (sym
, name
, true, true, NULL
);
14774 if (!gfc_add_component (sym
, name
, &token
))
14776 token
->ts
.type
= BT_VOID
;
14777 token
->ts
.kind
= gfc_default_integer_kind
;
14778 token
->attr
.access
= ACCESS_PRIVATE
;
14779 token
->attr
.artificial
= 1;
14780 token
->attr
.caf_token
= 1;
14785 check_defined_assignments (sym
);
14787 if (!sym
->attr
.defined_assign_comp
&& super_type
)
14788 sym
->attr
.defined_assign_comp
14789 = super_type
->attr
.defined_assign_comp
;
14791 /* If this is a non-ABSTRACT type extending an ABSTRACT one, ensure that
14792 all DEFERRED bindings are overridden. */
14793 if (super_type
&& super_type
->attr
.abstract
&& !sym
->attr
.abstract
14794 && !sym
->attr
.is_class
14795 && !ensure_not_abstract (sym
, super_type
))
14798 /* Check that there is a component for every PDT parameter. */
14799 if (sym
->attr
.pdt_template
)
14801 for (f
= sym
->formal
; f
; f
= f
->next
)
14805 c
= gfc_find_component (sym
, f
->sym
->name
, true, true, NULL
);
14808 gfc_error ("Parameterized type %qs does not have a component "
14809 "corresponding to parameter %qs at %L", sym
->name
,
14810 f
->sym
->name
, &sym
->declared_at
);
14816 /* Add derived type to the derived type list. */
14817 add_dt_to_dt_list (sym
);
14823 /* The following procedure does the full resolution of a derived type,
14824 including resolution of all type-bound procedures (if present). In contrast
14825 to 'resolve_fl_derived0' this can only be done after the module has been
14826 parsed completely. */
14829 resolve_fl_derived (gfc_symbol
*sym
)
14831 gfc_symbol
*gen_dt
= NULL
;
14833 if (sym
->attr
.unlimited_polymorphic
)
14836 if (!sym
->attr
.is_class
)
14837 gfc_find_symbol (sym
->name
, sym
->ns
, 0, &gen_dt
);
14838 if (gen_dt
&& gen_dt
->generic
&& gen_dt
->generic
->next
14839 && (!gen_dt
->generic
->sym
->attr
.use_assoc
14840 || gen_dt
->generic
->sym
->module
!= gen_dt
->generic
->next
->sym
->module
)
14841 && !gfc_notify_std (GFC_STD_F2003
, "Generic name %qs of function "
14842 "%qs at %L being the same name as derived "
14843 "type at %L", sym
->name
,
14844 gen_dt
->generic
->sym
== sym
14845 ? gen_dt
->generic
->next
->sym
->name
14846 : gen_dt
->generic
->sym
->name
,
14847 gen_dt
->generic
->sym
== sym
14848 ? &gen_dt
->generic
->next
->sym
->declared_at
14849 : &gen_dt
->generic
->sym
->declared_at
,
14850 &sym
->declared_at
))
14853 if (sym
->components
== NULL
&& !sym
->attr
.zero_comp
&& !sym
->attr
.use_assoc
)
14855 gfc_error ("Derived type %qs at %L has not been declared",
14856 sym
->name
, &sym
->declared_at
);
14860 /* Resolve the finalizer procedures. */
14861 if (!gfc_resolve_finalizers (sym
, NULL
))
14864 if (sym
->attr
.is_class
&& sym
->ts
.u
.derived
== NULL
)
14866 /* Fix up incomplete CLASS symbols. */
14867 gfc_component
*data
= gfc_find_component (sym
, "_data", true, true, NULL
);
14868 gfc_component
*vptr
= gfc_find_component (sym
, "_vptr", true, true, NULL
);
14870 /* Nothing more to do for unlimited polymorphic entities. */
14871 if (data
->ts
.u
.derived
->attr
.unlimited_polymorphic
)
14873 else if (vptr
->ts
.u
.derived
== NULL
)
14875 gfc_symbol
*vtab
= gfc_find_derived_vtab (data
->ts
.u
.derived
);
14877 vptr
->ts
.u
.derived
= vtab
->ts
.u
.derived
;
14878 if (!resolve_fl_derived0 (vptr
->ts
.u
.derived
))
14883 if (!resolve_fl_derived0 (sym
))
14886 /* Resolve the type-bound procedures. */
14887 if (!resolve_typebound_procedures (sym
))
14890 /* Generate module vtables subject to their accessibility and their not
14891 being vtables or pdt templates. If this is not done class declarations
14892 in external procedures wind up with their own version and so SELECT TYPE
14893 fails because the vptrs do not have the same address. */
14894 if (gfc_option
.allow_std
& GFC_STD_F2003
14895 && sym
->ns
->proc_name
14896 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14897 && sym
->attr
.access
!= ACCESS_PRIVATE
14898 && !(sym
->attr
.use_assoc
|| sym
->attr
.vtype
|| sym
->attr
.pdt_template
))
14900 gfc_symbol
*vtab
= gfc_find_derived_vtab (sym
);
14901 gfc_set_sym_referenced (vtab
);
14909 resolve_fl_namelist (gfc_symbol
*sym
)
14914 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14916 /* Check again, the check in match only works if NAMELIST comes
14918 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SIZE
)
14920 gfc_error ("Assumed size array %qs in namelist %qs at %L is not "
14921 "allowed", nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14925 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SHAPE
14926 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14927 "with assumed shape in namelist %qs at %L",
14928 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14931 if (is_non_constant_shape_array (nl
->sym
)
14932 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14933 "with nonconstant shape in namelist %qs at %L",
14934 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14937 if (nl
->sym
->ts
.type
== BT_CHARACTER
14938 && (nl
->sym
->ts
.u
.cl
->length
== NULL
14939 || !gfc_is_constant_expr (nl
->sym
->ts
.u
.cl
->length
))
14940 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs with "
14941 "nonconstant character length in "
14942 "namelist %qs at %L", nl
->sym
->name
,
14943 sym
->name
, &sym
->declared_at
))
14948 /* Reject PRIVATE objects in a PUBLIC namelist. */
14949 if (gfc_check_symbol_access (sym
))
14951 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14953 if (!nl
->sym
->attr
.use_assoc
14954 && !is_sym_host_assoc (nl
->sym
, sym
->ns
)
14955 && !gfc_check_symbol_access (nl
->sym
))
14957 gfc_error ("NAMELIST object %qs was declared PRIVATE and "
14958 "cannot be member of PUBLIC namelist %qs at %L",
14959 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14963 if (nl
->sym
->ts
.type
== BT_DERIVED
14964 && (nl
->sym
->ts
.u
.derived
->attr
.alloc_comp
14965 || nl
->sym
->ts
.u
.derived
->attr
.pointer_comp
))
14967 if (!gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs in "
14968 "namelist %qs at %L with ALLOCATABLE "
14969 "or POINTER components", nl
->sym
->name
,
14970 sym
->name
, &sym
->declared_at
))
14975 /* Types with private components that came here by USE-association. */
14976 if (nl
->sym
->ts
.type
== BT_DERIVED
14977 && derived_inaccessible (nl
->sym
->ts
.u
.derived
))
14979 gfc_error ("NAMELIST object %qs has use-associated PRIVATE "
14980 "components and cannot be member of namelist %qs at %L",
14981 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14985 /* Types with private components that are defined in the same module. */
14986 if (nl
->sym
->ts
.type
== BT_DERIVED
14987 && !is_sym_host_assoc (nl
->sym
->ts
.u
.derived
, sym
->ns
)
14988 && nl
->sym
->ts
.u
.derived
->attr
.private_comp
)
14990 gfc_error ("NAMELIST object %qs has PRIVATE components and "
14991 "cannot be a member of PUBLIC namelist %qs at %L",
14992 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14999 /* 14.1.2 A module or internal procedure represent local entities
15000 of the same type as a namelist member and so are not allowed. */
15001 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
15003 if (nl
->sym
->ts
.kind
!= 0 && nl
->sym
->attr
.flavor
== FL_VARIABLE
)
15006 if (nl
->sym
->attr
.function
&& nl
->sym
== nl
->sym
->result
)
15007 if ((nl
->sym
== sym
->ns
->proc_name
)
15009 (sym
->ns
->parent
&& nl
->sym
== sym
->ns
->parent
->proc_name
))
15014 gfc_find_symbol (nl
->sym
->name
, sym
->ns
, 1, &nlsym
);
15015 if (nlsym
&& nlsym
->attr
.flavor
== FL_PROCEDURE
)
15017 gfc_error ("PROCEDURE attribute conflicts with NAMELIST "
15018 "attribute in %qs at %L", nlsym
->name
,
15019 &sym
->declared_at
);
15029 resolve_fl_parameter (gfc_symbol
*sym
)
15031 /* A parameter array's shape needs to be constant. */
15032 if (sym
->as
!= NULL
15033 && (sym
->as
->type
== AS_DEFERRED
15034 || is_non_constant_shape_array (sym
)))
15036 gfc_error ("Parameter array %qs at %L cannot be automatic "
15037 "or of deferred shape", sym
->name
, &sym
->declared_at
);
15041 /* Constraints on deferred type parameter. */
15042 if (!deferred_requirements (sym
))
15045 /* Make sure a parameter that has been implicitly typed still
15046 matches the implicit type, since PARAMETER statements can precede
15047 IMPLICIT statements. */
15048 if (sym
->attr
.implicit_type
15049 && !gfc_compare_types (&sym
->ts
, gfc_get_default_type (sym
->name
,
15052 gfc_error ("Implicitly typed PARAMETER %qs at %L doesn't match a "
15053 "later IMPLICIT type", sym
->name
, &sym
->declared_at
);
15057 /* Make sure the types of derived parameters are consistent. This
15058 type checking is deferred until resolution because the type may
15059 refer to a derived type from the host. */
15060 if (sym
->ts
.type
== BT_DERIVED
15061 && !gfc_compare_types (&sym
->ts
, &sym
->value
->ts
))
15063 gfc_error ("Incompatible derived type in PARAMETER at %L",
15064 &sym
->value
->where
);
15068 /* F03:C509,C514. */
15069 if (sym
->ts
.type
== BT_CLASS
)
15071 gfc_error ("CLASS variable %qs at %L cannot have the PARAMETER attribute",
15072 sym
->name
, &sym
->declared_at
);
15080 /* Called by resolve_symbol to check PDTs. */
15083 resolve_pdt (gfc_symbol
* sym
)
15085 gfc_symbol
*derived
= NULL
;
15086 gfc_actual_arglist
*param
;
15088 bool const_len_exprs
= true;
15089 bool assumed_len_exprs
= false;
15090 symbol_attribute
*attr
;
15092 if (sym
->ts
.type
== BT_DERIVED
)
15094 derived
= sym
->ts
.u
.derived
;
15095 attr
= &(sym
->attr
);
15097 else if (sym
->ts
.type
== BT_CLASS
)
15099 derived
= CLASS_DATA (sym
)->ts
.u
.derived
;
15100 attr
= &(CLASS_DATA (sym
)->attr
);
15103 gcc_unreachable ();
15105 gcc_assert (derived
->attr
.pdt_type
);
15107 for (param
= sym
->param_list
; param
; param
= param
->next
)
15109 c
= gfc_find_component (derived
, param
->name
, false, true, NULL
);
15111 if (c
->attr
.pdt_kind
)
15114 if (param
->expr
&& !gfc_is_constant_expr (param
->expr
)
15115 && c
->attr
.pdt_len
)
15116 const_len_exprs
= false;
15117 else if (param
->spec_type
== SPEC_ASSUMED
)
15118 assumed_len_exprs
= true;
15120 if (param
->spec_type
== SPEC_DEFERRED
15121 && !attr
->allocatable
&& !attr
->pointer
)
15122 gfc_error ("The object %qs at %L has a deferred LEN "
15123 "parameter %qs and is neither allocatable "
15124 "nor a pointer", sym
->name
, &sym
->declared_at
,
15129 if (!const_len_exprs
15130 && (sym
->ns
->proc_name
->attr
.is_main_program
15131 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15132 || sym
->attr
.save
!= SAVE_NONE
))
15133 gfc_error ("The AUTOMATIC object %qs at %L must not have the "
15134 "SAVE attribute or be a variable declared in the "
15135 "main program, a module or a submodule(F08/C513)",
15136 sym
->name
, &sym
->declared_at
);
15138 if (assumed_len_exprs
&& !(sym
->attr
.dummy
15139 || sym
->attr
.select_type_temporary
|| sym
->attr
.associate_var
))
15140 gfc_error ("The object %qs at %L with ASSUMED type parameters "
15141 "must be a dummy or a SELECT TYPE selector(F08/4.2)",
15142 sym
->name
, &sym
->declared_at
);
15146 /* Do anything necessary to resolve a symbol. Right now, we just
15147 assume that an otherwise unknown symbol is a variable. This sort
15148 of thing commonly happens for symbols in module. */
15151 resolve_symbol (gfc_symbol
*sym
)
15153 int check_constant
, mp_flag
;
15154 gfc_symtree
*symtree
;
15155 gfc_symtree
*this_symtree
;
15158 symbol_attribute class_attr
;
15159 gfc_array_spec
*as
;
15160 bool saved_specification_expr
;
15162 if (sym
->resolve_symbol_called
>= 1)
15164 sym
->resolve_symbol_called
= 1;
15166 /* No symbol will ever have union type; only components can be unions.
15167 Union type declaration symbols have type BT_UNKNOWN but flavor FL_UNION
15168 (just like derived type declaration symbols have flavor FL_DERIVED). */
15169 gcc_assert (sym
->ts
.type
!= BT_UNION
);
15171 /* Coarrayed polymorphic objects with allocatable or pointer components are
15172 yet unsupported for -fcoarray=lib. */
15173 if (flag_coarray
== GFC_FCOARRAY_LIB
&& sym
->ts
.type
== BT_CLASS
15174 && sym
->ts
.u
.derived
&& CLASS_DATA (sym
)
15175 && CLASS_DATA (sym
)->attr
.codimension
15176 && (CLASS_DATA (sym
)->ts
.u
.derived
->attr
.alloc_comp
15177 || CLASS_DATA (sym
)->ts
.u
.derived
->attr
.pointer_comp
))
15179 gfc_error ("Sorry, allocatable/pointer components in polymorphic (CLASS) "
15180 "type coarrays at %L are unsupported", &sym
->declared_at
);
15184 if (sym
->attr
.artificial
)
15187 if (sym
->attr
.unlimited_polymorphic
)
15190 if (sym
->attr
.flavor
== FL_UNKNOWN
15191 || (sym
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.intrinsic
15192 && !sym
->attr
.generic
&& !sym
->attr
.external
15193 && sym
->attr
.if_source
== IFSRC_UNKNOWN
15194 && sym
->ts
.type
== BT_UNKNOWN
))
15197 /* If we find that a flavorless symbol is an interface in one of the
15198 parent namespaces, find its symtree in this namespace, free the
15199 symbol and set the symtree to point to the interface symbol. */
15200 for (ns
= gfc_current_ns
->parent
; ns
; ns
= ns
->parent
)
15202 symtree
= gfc_find_symtree (ns
->sym_root
, sym
->name
);
15203 if (symtree
&& (symtree
->n
.sym
->generic
||
15204 (symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
15205 && sym
->ns
->construct_entities
)))
15207 this_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
15209 if (this_symtree
->n
.sym
== sym
)
15211 symtree
->n
.sym
->refs
++;
15212 gfc_release_symbol (sym
);
15213 this_symtree
->n
.sym
= symtree
->n
.sym
;
15219 /* Otherwise give it a flavor according to such attributes as
15221 if (sym
->attr
.flavor
== FL_UNKNOWN
&& sym
->attr
.external
== 0
15222 && sym
->attr
.intrinsic
== 0)
15223 sym
->attr
.flavor
= FL_VARIABLE
;
15224 else if (sym
->attr
.flavor
== FL_UNKNOWN
)
15226 sym
->attr
.flavor
= FL_PROCEDURE
;
15227 if (sym
->attr
.dimension
)
15228 sym
->attr
.function
= 1;
15232 if (sym
->attr
.external
&& sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.function
)
15233 gfc_add_function (&sym
->attr
, sym
->name
, &sym
->declared_at
);
15235 if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
15236 && !resolve_procedure_interface (sym
))
15239 if (sym
->attr
.is_protected
&& !sym
->attr
.proc_pointer
15240 && (sym
->attr
.procedure
|| sym
->attr
.external
))
15242 if (sym
->attr
.external
)
15243 gfc_error ("PROTECTED attribute conflicts with EXTERNAL attribute "
15244 "at %L", &sym
->declared_at
);
15246 gfc_error ("PROCEDURE attribute conflicts with PROTECTED attribute "
15247 "at %L", &sym
->declared_at
);
15252 if (sym
->attr
.flavor
== FL_DERIVED
&& !resolve_fl_derived (sym
))
15255 else if ((sym
->attr
.flavor
== FL_STRUCT
|| sym
->attr
.flavor
== FL_UNION
)
15256 && !resolve_fl_struct (sym
))
15259 /* Symbols that are module procedures with results (functions) have
15260 the types and array specification copied for type checking in
15261 procedures that call them, as well as for saving to a module
15262 file. These symbols can't stand the scrutiny that their results
15264 mp_flag
= (sym
->result
!= NULL
&& sym
->result
!= sym
);
15266 /* Make sure that the intrinsic is consistent with its internal
15267 representation. This needs to be done before assigning a default
15268 type to avoid spurious warnings. */
15269 if (sym
->attr
.flavor
!= FL_MODULE
&& sym
->attr
.intrinsic
15270 && !gfc_resolve_intrinsic (sym
, &sym
->declared_at
))
15273 /* Resolve associate names. */
15275 resolve_assoc_var (sym
, true);
15277 /* Assign default type to symbols that need one and don't have one. */
15278 if (sym
->ts
.type
== BT_UNKNOWN
)
15280 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
)
15282 gfc_set_default_type (sym
, 1, NULL
);
15285 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.external
15286 && !sym
->attr
.function
&& !sym
->attr
.subroutine
15287 && gfc_get_default_type (sym
->name
, sym
->ns
)->type
== BT_UNKNOWN
)
15288 gfc_add_subroutine (&sym
->attr
, sym
->name
, &sym
->declared_at
);
15290 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
15292 /* The specific case of an external procedure should emit an error
15293 in the case that there is no implicit type. */
15296 if (!sym
->attr
.mixed_entry_master
)
15297 gfc_set_default_type (sym
, sym
->attr
.external
, NULL
);
15301 /* Result may be in another namespace. */
15302 resolve_symbol (sym
->result
);
15304 if (!sym
->result
->attr
.proc_pointer
)
15306 sym
->ts
= sym
->result
->ts
;
15307 sym
->as
= gfc_copy_array_spec (sym
->result
->as
);
15308 sym
->attr
.dimension
= sym
->result
->attr
.dimension
;
15309 sym
->attr
.pointer
= sym
->result
->attr
.pointer
;
15310 sym
->attr
.allocatable
= sym
->result
->attr
.allocatable
;
15311 sym
->attr
.contiguous
= sym
->result
->attr
.contiguous
;
15316 else if (mp_flag
&& sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
15318 bool saved_specification_expr
= specification_expr
;
15319 specification_expr
= true;
15320 gfc_resolve_array_spec (sym
->result
->as
, false);
15321 specification_expr
= saved_specification_expr
;
15324 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
15326 as
= CLASS_DATA (sym
)->as
;
15327 class_attr
= CLASS_DATA (sym
)->attr
;
15328 class_attr
.pointer
= class_attr
.class_pointer
;
15332 class_attr
= sym
->attr
;
15337 if (sym
->attr
.contiguous
15338 && (!class_attr
.dimension
15339 || (as
->type
!= AS_ASSUMED_SHAPE
&& as
->type
!= AS_ASSUMED_RANK
15340 && !class_attr
.pointer
)))
15342 gfc_error ("%qs at %L has the CONTIGUOUS attribute but is not an "
15343 "array pointer or an assumed-shape or assumed-rank array",
15344 sym
->name
, &sym
->declared_at
);
15348 /* Assumed size arrays and assumed shape arrays must be dummy
15349 arguments. Array-spec's of implied-shape should have been resolved to
15350 AS_EXPLICIT already. */
15354 /* If AS_IMPLIED_SHAPE makes it to here, it must be a bad
15355 specification expression. */
15356 if (as
->type
== AS_IMPLIED_SHAPE
)
15359 for (i
=0; i
<as
->rank
; i
++)
15361 if (as
->lower
[i
] != NULL
&& as
->upper
[i
] == NULL
)
15363 gfc_error ("Bad specification for assumed size array at %L",
15364 &as
->lower
[i
]->where
);
15371 if (((as
->type
== AS_ASSUMED_SIZE
&& !as
->cp_was_assumed
)
15372 || as
->type
== AS_ASSUMED_SHAPE
)
15373 && !sym
->attr
.dummy
&& !sym
->attr
.select_type_temporary
)
15375 if (as
->type
== AS_ASSUMED_SIZE
)
15376 gfc_error ("Assumed size array at %L must be a dummy argument",
15377 &sym
->declared_at
);
15379 gfc_error ("Assumed shape array at %L must be a dummy argument",
15380 &sym
->declared_at
);
15383 /* TS 29113, C535a. */
15384 if (as
->type
== AS_ASSUMED_RANK
&& !sym
->attr
.dummy
15385 && !sym
->attr
.select_type_temporary
15386 && !(cs_base
&& cs_base
->current
15387 && cs_base
->current
->op
== EXEC_SELECT_RANK
))
15389 gfc_error ("Assumed-rank array at %L must be a dummy argument",
15390 &sym
->declared_at
);
15393 if (as
->type
== AS_ASSUMED_RANK
15394 && (sym
->attr
.codimension
|| sym
->attr
.value
))
15396 gfc_error ("Assumed-rank array at %L may not have the VALUE or "
15397 "CODIMENSION attribute", &sym
->declared_at
);
15402 /* Make sure symbols with known intent or optional are really dummy
15403 variable. Because of ENTRY statement, this has to be deferred
15404 until resolution time. */
15406 if (!sym
->attr
.dummy
15407 && (sym
->attr
.optional
|| sym
->attr
.intent
!= INTENT_UNKNOWN
))
15409 gfc_error ("Symbol at %L is not a DUMMY variable", &sym
->declared_at
);
15413 if (sym
->attr
.value
&& !sym
->attr
.dummy
)
15415 gfc_error ("%qs at %L cannot have the VALUE attribute because "
15416 "it is not a dummy argument", sym
->name
, &sym
->declared_at
);
15420 if (sym
->attr
.value
&& sym
->ts
.type
== BT_CHARACTER
)
15422 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
15423 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
15425 gfc_error ("Character dummy variable %qs at %L with VALUE "
15426 "attribute must have constant length",
15427 sym
->name
, &sym
->declared_at
);
15431 if (sym
->ts
.is_c_interop
15432 && mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
15434 gfc_error ("C interoperable character dummy variable %qs at %L "
15435 "with VALUE attribute must have length one",
15436 sym
->name
, &sym
->declared_at
);
15441 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15442 && sym
->ts
.u
.derived
->attr
.generic
)
15444 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
15445 if (!sym
->ts
.u
.derived
)
15447 gfc_error ("The derived type %qs at %L is of type %qs, "
15448 "which has not been defined", sym
->name
,
15449 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15450 sym
->ts
.type
= BT_UNKNOWN
;
15455 /* Use the same constraints as TYPE(*), except for the type check
15456 and that only scalars and assumed-size arrays are permitted. */
15457 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
15459 if (!sym
->attr
.dummy
)
15461 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
15462 "a dummy argument", sym
->name
, &sym
->declared_at
);
15466 if (sym
->ts
.type
!= BT_ASSUMED
&& sym
->ts
.type
!= BT_INTEGER
15467 && sym
->ts
.type
!= BT_REAL
&& sym
->ts
.type
!= BT_LOGICAL
15468 && sym
->ts
.type
!= BT_COMPLEX
)
15470 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
15471 "of type TYPE(*) or of an numeric intrinsic type",
15472 sym
->name
, &sym
->declared_at
);
15476 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
15477 || sym
->attr
.pointer
|| sym
->attr
.value
)
15479 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
15480 "have the ALLOCATABLE, CODIMENSION, POINTER or VALUE "
15481 "attribute", sym
->name
, &sym
->declared_at
);
15485 if (sym
->attr
.intent
== INTENT_OUT
)
15487 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
15488 "have the INTENT(OUT) attribute",
15489 sym
->name
, &sym
->declared_at
);
15492 if (sym
->attr
.dimension
&& sym
->as
->type
!= AS_ASSUMED_SIZE
)
15494 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall "
15495 "either be a scalar or an assumed-size array",
15496 sym
->name
, &sym
->declared_at
);
15500 /* Set the type to TYPE(*) and add a dimension(*) to ensure
15501 NO_ARG_CHECK is correctly handled in trans*.c, e.g. with
15503 sym
->ts
.type
= BT_ASSUMED
;
15504 sym
->as
= gfc_get_array_spec ();
15505 sym
->as
->type
= AS_ASSUMED_SIZE
;
15507 sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
15509 else if (sym
->ts
.type
== BT_ASSUMED
)
15511 /* TS 29113, C407a. */
15512 if (!sym
->attr
.dummy
)
15514 gfc_error ("Assumed type of variable %s at %L is only permitted "
15515 "for dummy variables", sym
->name
, &sym
->declared_at
);
15518 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
15519 || sym
->attr
.pointer
|| sym
->attr
.value
)
15521 gfc_error ("Assumed-type variable %s at %L may not have the "
15522 "ALLOCATABLE, CODIMENSION, POINTER or VALUE attribute",
15523 sym
->name
, &sym
->declared_at
);
15526 if (sym
->attr
.intent
== INTENT_OUT
)
15528 gfc_error ("Assumed-type variable %s at %L may not have the "
15529 "INTENT(OUT) attribute",
15530 sym
->name
, &sym
->declared_at
);
15533 if (sym
->attr
.dimension
&& sym
->as
->type
== AS_EXPLICIT
)
15535 gfc_error ("Assumed-type variable %s at %L shall not be an "
15536 "explicit-shape array", sym
->name
, &sym
->declared_at
);
15541 /* If the symbol is marked as bind(c), that it is declared at module level
15542 scope and verify its type and kind. Do not do the latter for symbols
15543 that are implicitly typed because that is handled in
15544 gfc_set_default_type. Handle dummy arguments and procedure definitions
15545 separately. Also, anything that is use associated is not handled here
15546 but instead is handled in the module it is declared in. Finally, derived
15547 type definitions are allowed to be BIND(C) since that only implies that
15548 they're interoperable, and they are checked fully for interoperability
15549 when a variable is declared of that type. */
15550 if (sym
->attr
.is_bind_c
&& sym
->attr
.use_assoc
== 0
15551 && sym
->attr
.dummy
== 0 && sym
->attr
.flavor
!= FL_PROCEDURE
15552 && sym
->attr
.flavor
!= FL_DERIVED
)
15556 /* First, make sure the variable is declared at the
15557 module-level scope (J3/04-007, Section 15.3). */
15558 if (sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
&&
15559 sym
->attr
.in_common
== 0)
15561 gfc_error ("Variable %qs at %L cannot be BIND(C) because it "
15562 "is neither a COMMON block nor declared at the "
15563 "module level scope", sym
->name
, &(sym
->declared_at
));
15566 else if (sym
->ts
.type
== BT_CHARACTER
15567 && (sym
->ts
.u
.cl
== NULL
|| sym
->ts
.u
.cl
->length
== NULL
15568 || !gfc_is_constant_expr (sym
->ts
.u
.cl
->length
)
15569 || mpz_cmp_si (sym
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
15571 gfc_error ("BIND(C) Variable %qs at %L must have length one",
15572 sym
->name
, &sym
->declared_at
);
15575 else if (sym
->common_head
!= NULL
&& sym
->attr
.implicit_type
== 0)
15577 t
= verify_com_block_vars_c_interop (sym
->common_head
);
15579 else if (sym
->attr
.implicit_type
== 0)
15581 /* If type() declaration, we need to verify that the components
15582 of the given type are all C interoperable, etc. */
15583 if (sym
->ts
.type
== BT_DERIVED
&&
15584 sym
->ts
.u
.derived
->attr
.is_c_interop
!= 1)
15586 /* Make sure the user marked the derived type as BIND(C). If
15587 not, call the verify routine. This could print an error
15588 for the derived type more than once if multiple variables
15589 of that type are declared. */
15590 if (sym
->ts
.u
.derived
->attr
.is_bind_c
!= 1)
15591 verify_bind_c_derived_type (sym
->ts
.u
.derived
);
15595 /* Verify the variable itself as C interoperable if it
15596 is BIND(C). It is not possible for this to succeed if
15597 the verify_bind_c_derived_type failed, so don't have to handle
15598 any error returned by verify_bind_c_derived_type. */
15599 t
= verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
15600 sym
->common_block
);
15605 /* clear the is_bind_c flag to prevent reporting errors more than
15606 once if something failed. */
15607 sym
->attr
.is_bind_c
= 0;
15612 /* If a derived type symbol has reached this point, without its
15613 type being declared, we have an error. Notice that most
15614 conditions that produce undefined derived types have already
15615 been dealt with. However, the likes of:
15616 implicit type(t) (t) ..... call foo (t) will get us here if
15617 the type is not declared in the scope of the implicit
15618 statement. Change the type to BT_UNKNOWN, both because it is so
15619 and to prevent an ICE. */
15620 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15621 && sym
->ts
.u
.derived
->components
== NULL
15622 && !sym
->ts
.u
.derived
->attr
.zero_comp
)
15624 gfc_error ("The derived type %qs at %L is of type %qs, "
15625 "which has not been defined", sym
->name
,
15626 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15627 sym
->ts
.type
= BT_UNKNOWN
;
15631 /* Make sure that the derived type has been resolved and that the
15632 derived type is visible in the symbol's namespace, if it is a
15633 module function and is not PRIVATE. */
15634 if (sym
->ts
.type
== BT_DERIVED
15635 && sym
->ts
.u
.derived
->attr
.use_assoc
15636 && sym
->ns
->proc_name
15637 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15638 && !resolve_fl_derived (sym
->ts
.u
.derived
))
15641 /* Unless the derived-type declaration is use associated, Fortran 95
15642 does not allow public entries of private derived types.
15643 See 4.4.1 (F95) and 4.5.1.1 (F2003); and related interpretation
15644 161 in 95-006r3. */
15645 if (sym
->ts
.type
== BT_DERIVED
15646 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15647 && !sym
->ts
.u
.derived
->attr
.use_assoc
15648 && gfc_check_symbol_access (sym
)
15649 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
15650 && !gfc_notify_std (GFC_STD_F2003
, "PUBLIC %s %qs at %L of PRIVATE "
15651 "derived type %qs",
15652 (sym
->attr
.flavor
== FL_PARAMETER
)
15653 ? "parameter" : "variable",
15654 sym
->name
, &sym
->declared_at
,
15655 sym
->ts
.u
.derived
->name
))
15658 /* F2008, C1302. */
15659 if (sym
->ts
.type
== BT_DERIVED
15660 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15661 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
15662 || sym
->ts
.u
.derived
->attr
.lock_comp
)
15663 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15665 gfc_error ("Variable %s at %L of type LOCK_TYPE or with subcomponent of "
15666 "type LOCK_TYPE must be a coarray", sym
->name
,
15667 &sym
->declared_at
);
15671 /* TS18508, C702/C703. */
15672 if (sym
->ts
.type
== BT_DERIVED
15673 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15674 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
15675 || sym
->ts
.u
.derived
->attr
.event_comp
)
15676 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15678 gfc_error ("Variable %s at %L of type EVENT_TYPE or with subcomponent of "
15679 "type EVENT_TYPE must be a coarray", sym
->name
,
15680 &sym
->declared_at
);
15684 /* An assumed-size array with INTENT(OUT) shall not be of a type for which
15685 default initialization is defined (5.1.2.4.4). */
15686 if (sym
->ts
.type
== BT_DERIVED
15688 && sym
->attr
.intent
== INTENT_OUT
15690 && sym
->as
->type
== AS_ASSUMED_SIZE
)
15692 for (c
= sym
->ts
.u
.derived
->components
; c
; c
= c
->next
)
15694 if (c
->initializer
)
15696 gfc_error ("The INTENT(OUT) dummy argument %qs at %L is "
15697 "ASSUMED SIZE and so cannot have a default initializer",
15698 sym
->name
, &sym
->declared_at
);
15705 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15706 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.lock_comp
)
15708 gfc_error ("Dummy argument %qs at %L of LOCK_TYPE shall not be "
15709 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15714 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15715 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.event_comp
)
15717 gfc_error ("Dummy argument %qs at %L of EVENT_TYPE shall not be "
15718 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15723 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15724 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15725 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15726 || class_attr
.codimension
)
15727 && (sym
->attr
.result
|| sym
->result
== sym
))
15729 gfc_error ("Function result %qs at %L shall not be a coarray or have "
15730 "a coarray component", sym
->name
, &sym
->declared_at
);
15735 if (sym
->attr
.codimension
&& sym
->ts
.type
== BT_DERIVED
15736 && sym
->ts
.u
.derived
->ts
.is_iso_c
)
15738 gfc_error ("Variable %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
15739 "shall not be a coarray", sym
->name
, &sym
->declared_at
);
15744 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15745 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15746 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15747 && (class_attr
.codimension
|| class_attr
.pointer
|| class_attr
.dimension
15748 || class_attr
.allocatable
))
15750 gfc_error ("Variable %qs at %L with coarray component shall be a "
15751 "nonpointer, nonallocatable scalar, which is not a coarray",
15752 sym
->name
, &sym
->declared_at
);
15756 /* F2008, C526. The function-result case was handled above. */
15757 if (class_attr
.codimension
15758 && !(class_attr
.allocatable
|| sym
->attr
.dummy
|| sym
->attr
.save
15759 || sym
->attr
.select_type_temporary
15760 || sym
->attr
.associate_var
15761 || (sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15762 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15763 || sym
->ns
->proc_name
->attr
.is_main_program
15764 || sym
->attr
.function
|| sym
->attr
.result
|| sym
->attr
.use_assoc
))
15766 gfc_error ("Variable %qs at %L is a coarray and is not ALLOCATABLE, SAVE "
15767 "nor a dummy argument", sym
->name
, &sym
->declared_at
);
15771 else if (class_attr
.codimension
&& !sym
->attr
.select_type_temporary
15772 && !class_attr
.allocatable
&& as
&& as
->cotype
== AS_DEFERRED
)
15774 gfc_error ("Coarray variable %qs at %L shall not have codimensions with "
15775 "deferred shape", sym
->name
, &sym
->declared_at
);
15778 else if (class_attr
.codimension
&& class_attr
.allocatable
&& as
15779 && (as
->cotype
!= AS_DEFERRED
|| as
->type
!= AS_DEFERRED
))
15781 gfc_error ("Allocatable coarray variable %qs at %L must have "
15782 "deferred shape", sym
->name
, &sym
->declared_at
);
15787 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15788 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15789 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15790 || (class_attr
.codimension
&& class_attr
.allocatable
))
15791 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
)
15793 gfc_error ("Variable %qs at %L is INTENT(OUT) and can thus not be an "
15794 "allocatable coarray or have coarray components",
15795 sym
->name
, &sym
->declared_at
);
15799 if (class_attr
.codimension
&& sym
->attr
.dummy
15800 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.is_bind_c
)
15802 gfc_error ("Coarray dummy variable %qs at %L not allowed in BIND(C) "
15803 "procedure %qs", sym
->name
, &sym
->declared_at
,
15804 sym
->ns
->proc_name
->name
);
15808 if (sym
->ts
.type
== BT_LOGICAL
15809 && ((sym
->attr
.function
&& sym
->attr
.is_bind_c
&& sym
->result
== sym
)
15810 || ((sym
->attr
.dummy
|| sym
->attr
.result
) && sym
->ns
->proc_name
15811 && sym
->ns
->proc_name
->attr
.is_bind_c
)))
15814 for (i
= 0; gfc_logical_kinds
[i
].kind
; i
++)
15815 if (gfc_logical_kinds
[i
].kind
== sym
->ts
.kind
)
15817 if (!gfc_logical_kinds
[i
].c_bool
&& sym
->attr
.dummy
15818 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL dummy argument %qs at "
15819 "%L with non-C_Bool kind in BIND(C) procedure "
15820 "%qs", sym
->name
, &sym
->declared_at
,
15821 sym
->ns
->proc_name
->name
))
15823 else if (!gfc_logical_kinds
[i
].c_bool
15824 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL result variable "
15825 "%qs at %L with non-C_Bool kind in "
15826 "BIND(C) procedure %qs", sym
->name
,
15828 sym
->attr
.function
? sym
->name
15829 : sym
->ns
->proc_name
->name
))
15833 switch (sym
->attr
.flavor
)
15836 if (!resolve_fl_variable (sym
, mp_flag
))
15841 if (sym
->formal
&& !sym
->formal_ns
)
15843 /* Check that none of the arguments are a namelist. */
15844 gfc_formal_arglist
*formal
= sym
->formal
;
15846 for (; formal
; formal
= formal
->next
)
15847 if (formal
->sym
&& formal
->sym
->attr
.flavor
== FL_NAMELIST
)
15849 gfc_error ("Namelist %qs cannot be an argument to "
15850 "subroutine or function at %L",
15851 formal
->sym
->name
, &sym
->declared_at
);
15856 if (!resolve_fl_procedure (sym
, mp_flag
))
15861 if (!resolve_fl_namelist (sym
))
15866 if (!resolve_fl_parameter (sym
))
15874 /* Resolve array specifier. Check as well some constraints
15875 on COMMON blocks. */
15877 check_constant
= sym
->attr
.in_common
&& !sym
->attr
.pointer
;
15879 /* Set the formal_arg_flag so that check_conflict will not throw
15880 an error for host associated variables in the specification
15881 expression for an array_valued function. */
15882 if ((sym
->attr
.function
|| sym
->attr
.result
) && sym
->as
)
15883 formal_arg_flag
= true;
15885 saved_specification_expr
= specification_expr
;
15886 specification_expr
= true;
15887 gfc_resolve_array_spec (sym
->as
, check_constant
);
15888 specification_expr
= saved_specification_expr
;
15890 formal_arg_flag
= false;
15892 /* Resolve formal namespaces. */
15893 if (sym
->formal_ns
&& sym
->formal_ns
!= gfc_current_ns
15894 && !sym
->attr
.contained
&& !sym
->attr
.intrinsic
)
15895 gfc_resolve (sym
->formal_ns
);
15897 /* Make sure the formal namespace is present. */
15898 if (sym
->formal
&& !sym
->formal_ns
)
15900 gfc_formal_arglist
*formal
= sym
->formal
;
15901 while (formal
&& !formal
->sym
)
15902 formal
= formal
->next
;
15906 sym
->formal_ns
= formal
->sym
->ns
;
15907 if (sym
->ns
!= formal
->sym
->ns
)
15908 sym
->formal_ns
->refs
++;
15912 /* Check threadprivate restrictions. */
15913 if (sym
->attr
.threadprivate
&& !sym
->attr
.save
15914 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15915 && (!sym
->attr
.in_common
15916 && sym
->module
== NULL
15917 && (sym
->ns
->proc_name
== NULL
15918 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15919 gfc_error ("Threadprivate at %L isn't SAVEd", &sym
->declared_at
);
15921 /* Check omp declare target restrictions. */
15922 if (sym
->attr
.omp_declare_target
15923 && sym
->attr
.flavor
== FL_VARIABLE
15925 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15926 && (!sym
->attr
.in_common
15927 && sym
->module
== NULL
15928 && (sym
->ns
->proc_name
== NULL
15929 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15930 gfc_error ("!$OMP DECLARE TARGET variable %qs at %L isn't SAVEd",
15931 sym
->name
, &sym
->declared_at
);
15933 /* If we have come this far we can apply default-initializers, as
15934 described in 14.7.5, to those variables that have not already
15935 been assigned one. */
15936 if (sym
->ts
.type
== BT_DERIVED
15938 && !sym
->attr
.allocatable
15939 && !sym
->attr
.alloc_comp
)
15941 symbol_attribute
*a
= &sym
->attr
;
15943 if ((!a
->save
&& !a
->dummy
&& !a
->pointer
15944 && !a
->in_common
&& !a
->use_assoc
15946 && !((a
->function
|| a
->result
)
15948 || sym
->ts
.u
.derived
->attr
.alloc_comp
15949 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15950 && !(a
->function
&& sym
!= sym
->result
))
15951 || (a
->dummy
&& a
->intent
== INTENT_OUT
&& !a
->pointer
))
15952 apply_default_init (sym
);
15953 else if (a
->function
&& sym
->result
&& a
->access
!= ACCESS_PRIVATE
15954 && (sym
->ts
.u
.derived
->attr
.alloc_comp
15955 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15956 /* Mark the result symbol to be referenced, when it has allocatable
15958 sym
->result
->attr
.referenced
= 1;
15961 if (sym
->ts
.type
== BT_CLASS
&& sym
->ns
== gfc_current_ns
15962 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
15963 && !CLASS_DATA (sym
)->attr
.class_pointer
15964 && !CLASS_DATA (sym
)->attr
.allocatable
)
15965 apply_default_init (sym
);
15967 /* If this symbol has a type-spec, check it. */
15968 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
15969 || (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
))
15970 if (!resolve_typespec_used (&sym
->ts
, &sym
->declared_at
, sym
->name
))
15973 if (sym
->param_list
)
15978 /************* Resolve DATA statements *************/
15982 gfc_data_value
*vnode
;
15988 /* Advance the values structure to point to the next value in the data list. */
15991 next_data_value (void)
15993 while (mpz_cmp_ui (values
.left
, 0) == 0)
15996 if (values
.vnode
->next
== NULL
)
15999 values
.vnode
= values
.vnode
->next
;
16000 mpz_set (values
.left
, values
.vnode
->repeat
);
16008 check_data_variable (gfc_data_variable
*var
, locus
*where
)
16014 ar_type mark
= AR_UNKNOWN
;
16016 mpz_t section_index
[GFC_MAX_DIMENSIONS
];
16022 if (!gfc_resolve_expr (var
->expr
))
16026 mpz_init_set_si (offset
, 0);
16029 if (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
16030 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
16031 e
= e
->value
.function
.actual
->expr
;
16033 if (e
->expr_type
!= EXPR_VARIABLE
)
16035 gfc_error ("Expecting definable entity near %L", where
);
16039 sym
= e
->symtree
->n
.sym
;
16041 if (sym
->ns
->is_block_data
&& !sym
->attr
.in_common
)
16043 gfc_error ("BLOCK DATA element %qs at %L must be in COMMON",
16044 sym
->name
, &sym
->declared_at
);
16048 if (e
->ref
== NULL
&& sym
->as
)
16050 gfc_error ("DATA array %qs at %L must be specified in a previous"
16051 " declaration", sym
->name
, where
);
16055 if (gfc_is_coindexed (e
))
16057 gfc_error ("DATA element %qs at %L cannot have a coindex", sym
->name
,
16062 has_pointer
= sym
->attr
.pointer
;
16064 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
16066 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.pointer
)
16071 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.type
!= AR_FULL
)
16073 gfc_error ("DATA element %qs at %L is a pointer and so must "
16074 "be a full array", sym
->name
, where
);
16078 if (values
.vnode
->expr
->expr_type
== EXPR_CONSTANT
)
16080 gfc_error ("DATA object near %L has the pointer attribute "
16081 "and the corresponding DATA value is not a valid "
16082 "initial-data-target", where
);
16088 if (e
->rank
== 0 || has_pointer
)
16090 mpz_init_set_ui (size
, 1);
16097 /* Find the array section reference. */
16098 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
16100 if (ref
->type
!= REF_ARRAY
)
16102 if (ref
->u
.ar
.type
== AR_ELEMENT
)
16108 /* Set marks according to the reference pattern. */
16109 switch (ref
->u
.ar
.type
)
16117 /* Get the start position of array section. */
16118 gfc_get_section_index (ar
, section_index
, &offset
);
16123 gcc_unreachable ();
16126 if (!gfc_array_size (e
, &size
))
16128 gfc_error ("Nonconstant array section at %L in DATA statement",
16130 mpz_clear (offset
);
16137 while (mpz_cmp_ui (size
, 0) > 0)
16139 if (!next_data_value ())
16141 gfc_error ("DATA statement at %L has more variables than values",
16147 t
= gfc_check_assign (var
->expr
, values
.vnode
->expr
, 0);
16151 /* If we have more than one element left in the repeat count,
16152 and we have more than one element left in the target variable,
16153 then create a range assignment. */
16154 /* FIXME: Only done for full arrays for now, since array sections
16156 if (mark
== AR_FULL
&& ref
&& ref
->next
== NULL
16157 && mpz_cmp_ui (values
.left
, 1) > 0 && mpz_cmp_ui (size
, 1) > 0)
16161 if (mpz_cmp (size
, values
.left
) >= 0)
16163 mpz_init_set (range
, values
.left
);
16164 mpz_sub (size
, size
, values
.left
);
16165 mpz_set_ui (values
.left
, 0);
16169 mpz_init_set (range
, size
);
16170 mpz_sub (values
.left
, values
.left
, size
);
16171 mpz_set_ui (size
, 0);
16174 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
16177 mpz_add (offset
, offset
, range
);
16184 /* Assign initial value to symbol. */
16187 mpz_sub_ui (values
.left
, values
.left
, 1);
16188 mpz_sub_ui (size
, size
, 1);
16190 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
16195 if (mark
== AR_FULL
)
16196 mpz_add_ui (offset
, offset
, 1);
16198 /* Modify the array section indexes and recalculate the offset
16199 for next element. */
16200 else if (mark
== AR_SECTION
)
16201 gfc_advance_section (section_index
, ar
, &offset
);
16205 if (mark
== AR_SECTION
)
16207 for (i
= 0; i
< ar
->dimen
; i
++)
16208 mpz_clear (section_index
[i
]);
16212 mpz_clear (offset
);
16218 static bool traverse_data_var (gfc_data_variable
*, locus
*);
16220 /* Iterate over a list of elements in a DATA statement. */
16223 traverse_data_list (gfc_data_variable
*var
, locus
*where
)
16226 iterator_stack frame
;
16227 gfc_expr
*e
, *start
, *end
, *step
;
16228 bool retval
= true;
16230 mpz_init (frame
.value
);
16233 start
= gfc_copy_expr (var
->iter
.start
);
16234 end
= gfc_copy_expr (var
->iter
.end
);
16235 step
= gfc_copy_expr (var
->iter
.step
);
16237 if (!gfc_simplify_expr (start
, 1)
16238 || start
->expr_type
!= EXPR_CONSTANT
)
16240 gfc_error ("start of implied-do loop at %L could not be "
16241 "simplified to a constant value", &start
->where
);
16245 if (!gfc_simplify_expr (end
, 1)
16246 || end
->expr_type
!= EXPR_CONSTANT
)
16248 gfc_error ("end of implied-do loop at %L could not be "
16249 "simplified to a constant value", &start
->where
);
16253 if (!gfc_simplify_expr (step
, 1)
16254 || step
->expr_type
!= EXPR_CONSTANT
)
16256 gfc_error ("step of implied-do loop at %L could not be "
16257 "simplified to a constant value", &start
->where
);
16262 mpz_set (trip
, end
->value
.integer
);
16263 mpz_sub (trip
, trip
, start
->value
.integer
);
16264 mpz_add (trip
, trip
, step
->value
.integer
);
16266 mpz_div (trip
, trip
, step
->value
.integer
);
16268 mpz_set (frame
.value
, start
->value
.integer
);
16270 frame
.prev
= iter_stack
;
16271 frame
.variable
= var
->iter
.var
->symtree
;
16272 iter_stack
= &frame
;
16274 while (mpz_cmp_ui (trip
, 0) > 0)
16276 if (!traverse_data_var (var
->list
, where
))
16282 e
= gfc_copy_expr (var
->expr
);
16283 if (!gfc_simplify_expr (e
, 1))
16290 mpz_add (frame
.value
, frame
.value
, step
->value
.integer
);
16292 mpz_sub_ui (trip
, trip
, 1);
16296 mpz_clear (frame
.value
);
16299 gfc_free_expr (start
);
16300 gfc_free_expr (end
);
16301 gfc_free_expr (step
);
16303 iter_stack
= frame
.prev
;
16308 /* Type resolve variables in the variable list of a DATA statement. */
16311 traverse_data_var (gfc_data_variable
*var
, locus
*where
)
16315 for (; var
; var
= var
->next
)
16317 if (var
->expr
== NULL
)
16318 t
= traverse_data_list (var
, where
);
16320 t
= check_data_variable (var
, where
);
16330 /* Resolve the expressions and iterators associated with a data statement.
16331 This is separate from the assignment checking because data lists should
16332 only be resolved once. */
16335 resolve_data_variables (gfc_data_variable
*d
)
16337 for (; d
; d
= d
->next
)
16339 if (d
->list
== NULL
)
16341 if (!gfc_resolve_expr (d
->expr
))
16346 if (!gfc_resolve_iterator (&d
->iter
, false, true))
16349 if (!resolve_data_variables (d
->list
))
16358 /* Resolve a single DATA statement. We implement this by storing a pointer to
16359 the value list into static variables, and then recursively traversing the
16360 variables list, expanding iterators and such. */
16363 resolve_data (gfc_data
*d
)
16366 if (!resolve_data_variables (d
->var
))
16369 values
.vnode
= d
->value
;
16370 if (d
->value
== NULL
)
16371 mpz_set_ui (values
.left
, 0);
16373 mpz_set (values
.left
, d
->value
->repeat
);
16375 if (!traverse_data_var (d
->var
, &d
->where
))
16378 /* At this point, we better not have any values left. */
16380 if (next_data_value ())
16381 gfc_error ("DATA statement at %L has more values than variables",
16386 /* 12.6 Constraint: In a pure subprogram any variable which is in common or
16387 accessed by host or use association, is a dummy argument to a pure function,
16388 is a dummy argument with INTENT (IN) to a pure subroutine, or an object that
16389 is storage associated with any such variable, shall not be used in the
16390 following contexts: (clients of this function). */
16392 /* Determines if a variable is not 'pure', i.e., not assignable within a pure
16393 procedure. Returns zero if assignment is OK, nonzero if there is a
16396 gfc_impure_variable (gfc_symbol
*sym
)
16401 if (sym
->attr
.use_assoc
|| sym
->attr
.in_common
)
16404 /* Check if the symbol's ns is inside the pure procedure. */
16405 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16409 if (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.function
)
16413 proc
= sym
->ns
->proc_name
;
16414 if (sym
->attr
.dummy
16415 && ((proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_IN
)
16416 || proc
->attr
.function
))
16419 /* TODO: Sort out what can be storage associated, if anything, and include
16420 it here. In principle equivalences should be scanned but it does not
16421 seem to be possible to storage associate an impure variable this way. */
16426 /* Test whether a symbol is pure or not. For a NULL pointer, checks if the
16427 current namespace is inside a pure procedure. */
16430 gfc_pure (gfc_symbol
*sym
)
16432 symbol_attribute attr
;
16437 /* Check if the current namespace or one of its parents
16438 belongs to a pure procedure. */
16439 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16441 sym
= ns
->proc_name
;
16445 if (attr
.flavor
== FL_PROCEDURE
&& attr
.pure
)
16453 return attr
.flavor
== FL_PROCEDURE
&& attr
.pure
;
16457 /* Test whether a symbol is implicitly pure or not. For a NULL pointer,
16458 checks if the current namespace is implicitly pure. Note that this
16459 function returns false for a PURE procedure. */
16462 gfc_implicit_pure (gfc_symbol
*sym
)
16468 /* Check if the current procedure is implicit_pure. Walk up
16469 the procedure list until we find a procedure. */
16470 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16472 sym
= ns
->proc_name
;
16476 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16481 return sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.implicit_pure
16482 && !sym
->attr
.pure
;
16487 gfc_unset_implicit_pure (gfc_symbol
*sym
)
16493 /* Check if the current procedure is implicit_pure. Walk up
16494 the procedure list until we find a procedure. */
16495 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16497 sym
= ns
->proc_name
;
16501 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16506 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16507 sym
->attr
.implicit_pure
= 0;
16509 sym
->attr
.pure
= 0;
16513 /* Test whether the current procedure is elemental or not. */
16516 gfc_elemental (gfc_symbol
*sym
)
16518 symbol_attribute attr
;
16521 sym
= gfc_current_ns
->proc_name
;
16526 return attr
.flavor
== FL_PROCEDURE
&& attr
.elemental
;
16530 /* Warn about unused labels. */
16533 warn_unused_fortran_label (gfc_st_label
*label
)
16538 warn_unused_fortran_label (label
->left
);
16540 if (label
->defined
== ST_LABEL_UNKNOWN
)
16543 switch (label
->referenced
)
16545 case ST_LABEL_UNKNOWN
:
16546 gfc_warning (OPT_Wunused_label
, "Label %d at %L defined but not used",
16547 label
->value
, &label
->where
);
16550 case ST_LABEL_BAD_TARGET
:
16551 gfc_warning (OPT_Wunused_label
,
16552 "Label %d at %L defined but cannot be used",
16553 label
->value
, &label
->where
);
16560 warn_unused_fortran_label (label
->right
);
16564 /* Returns the sequence type of a symbol or sequence. */
16567 sequence_type (gfc_typespec ts
)
16576 if (ts
.u
.derived
->components
== NULL
)
16577 return SEQ_NONDEFAULT
;
16579 result
= sequence_type (ts
.u
.derived
->components
->ts
);
16580 for (c
= ts
.u
.derived
->components
->next
; c
; c
= c
->next
)
16581 if (sequence_type (c
->ts
) != result
)
16587 if (ts
.kind
!= gfc_default_character_kind
)
16588 return SEQ_NONDEFAULT
;
16590 return SEQ_CHARACTER
;
16593 if (ts
.kind
!= gfc_default_integer_kind
)
16594 return SEQ_NONDEFAULT
;
16596 return SEQ_NUMERIC
;
16599 if (!(ts
.kind
== gfc_default_real_kind
16600 || ts
.kind
== gfc_default_double_kind
))
16601 return SEQ_NONDEFAULT
;
16603 return SEQ_NUMERIC
;
16606 if (ts
.kind
!= gfc_default_complex_kind
)
16607 return SEQ_NONDEFAULT
;
16609 return SEQ_NUMERIC
;
16612 if (ts
.kind
!= gfc_default_logical_kind
)
16613 return SEQ_NONDEFAULT
;
16615 return SEQ_NUMERIC
;
16618 return SEQ_NONDEFAULT
;
16623 /* Resolve derived type EQUIVALENCE object. */
16626 resolve_equivalence_derived (gfc_symbol
*derived
, gfc_symbol
*sym
, gfc_expr
*e
)
16628 gfc_component
*c
= derived
->components
;
16633 /* Shall not be an object of nonsequence derived type. */
16634 if (!derived
->attr
.sequence
)
16636 gfc_error ("Derived type variable %qs at %L must have SEQUENCE "
16637 "attribute to be an EQUIVALENCE object", sym
->name
,
16642 /* Shall not have allocatable components. */
16643 if (derived
->attr
.alloc_comp
)
16645 gfc_error ("Derived type variable %qs at %L cannot have ALLOCATABLE "
16646 "components to be an EQUIVALENCE object",sym
->name
,
16651 if (sym
->attr
.in_common
&& gfc_has_default_initializer (sym
->ts
.u
.derived
))
16653 gfc_error ("Derived type variable %qs at %L with default "
16654 "initialization cannot be in EQUIVALENCE with a variable "
16655 "in COMMON", sym
->name
, &e
->where
);
16659 for (; c
; c
= c
->next
)
16661 if (gfc_bt_struct (c
->ts
.type
)
16662 && (!resolve_equivalence_derived(c
->ts
.u
.derived
, sym
, e
)))
16665 /* Shall not be an object of sequence derived type containing a pointer
16666 in the structure. */
16667 if (c
->attr
.pointer
)
16669 gfc_error ("Derived type variable %qs at %L with pointer "
16670 "component(s) cannot be an EQUIVALENCE object",
16671 sym
->name
, &e
->where
);
16679 /* Resolve equivalence object.
16680 An EQUIVALENCE object shall not be a dummy argument, a pointer, a target,
16681 an allocatable array, an object of nonsequence derived type, an object of
16682 sequence derived type containing a pointer at any level of component
16683 selection, an automatic object, a function name, an entry name, a result
16684 name, a named constant, a structure component, or a subobject of any of
16685 the preceding objects. A substring shall not have length zero. A
16686 derived type shall not have components with default initialization nor
16687 shall two objects of an equivalence group be initialized.
16688 Either all or none of the objects shall have an protected attribute.
16689 The simple constraints are done in symbol.c(check_conflict) and the rest
16690 are implemented here. */
16693 resolve_equivalence (gfc_equiv
*eq
)
16696 gfc_symbol
*first_sym
;
16699 locus
*last_where
= NULL
;
16700 seq_type eq_type
, last_eq_type
;
16701 gfc_typespec
*last_ts
;
16702 int object
, cnt_protected
;
16705 last_ts
= &eq
->expr
->symtree
->n
.sym
->ts
;
16707 first_sym
= eq
->expr
->symtree
->n
.sym
;
16711 for (object
= 1; eq
; eq
= eq
->eq
, object
++)
16715 e
->ts
= e
->symtree
->n
.sym
->ts
;
16716 /* match_varspec might not know yet if it is seeing
16717 array reference or substring reference, as it doesn't
16719 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
)
16721 gfc_ref
*ref
= e
->ref
;
16722 sym
= e
->symtree
->n
.sym
;
16724 if (sym
->attr
.dimension
)
16726 ref
->u
.ar
.as
= sym
->as
;
16730 /* For substrings, convert REF_ARRAY into REF_SUBSTRING. */
16731 if (e
->ts
.type
== BT_CHARACTER
16733 && ref
->type
== REF_ARRAY
16734 && ref
->u
.ar
.dimen
== 1
16735 && ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
16736 && ref
->u
.ar
.stride
[0] == NULL
)
16738 gfc_expr
*start
= ref
->u
.ar
.start
[0];
16739 gfc_expr
*end
= ref
->u
.ar
.end
[0];
16742 /* Optimize away the (:) reference. */
16743 if (start
== NULL
&& end
== NULL
)
16746 e
->ref
= ref
->next
;
16748 e
->ref
->next
= ref
->next
;
16753 ref
->type
= REF_SUBSTRING
;
16755 start
= gfc_get_int_expr (gfc_charlen_int_kind
,
16757 ref
->u
.ss
.start
= start
;
16758 if (end
== NULL
&& e
->ts
.u
.cl
)
16759 end
= gfc_copy_expr (e
->ts
.u
.cl
->length
);
16760 ref
->u
.ss
.end
= end
;
16761 ref
->u
.ss
.length
= e
->ts
.u
.cl
;
16768 /* Any further ref is an error. */
16771 gcc_assert (ref
->type
== REF_ARRAY
);
16772 gfc_error ("Syntax error in EQUIVALENCE statement at %L",
16778 if (!gfc_resolve_expr (e
))
16781 sym
= e
->symtree
->n
.sym
;
16783 if (sym
->attr
.is_protected
)
16785 if (cnt_protected
> 0 && cnt_protected
!= object
)
16787 gfc_error ("Either all or none of the objects in the "
16788 "EQUIVALENCE set at %L shall have the "
16789 "PROTECTED attribute",
16794 /* Shall not equivalence common block variables in a PURE procedure. */
16795 if (sym
->ns
->proc_name
16796 && sym
->ns
->proc_name
->attr
.pure
16797 && sym
->attr
.in_common
)
16799 /* Need to check for symbols that may have entered the pure
16800 procedure via a USE statement. */
16801 bool saw_sym
= false;
16802 if (sym
->ns
->use_stmts
)
16805 for (r
= sym
->ns
->use_stmts
->rename
; r
; r
= r
->next
)
16806 if (strcmp(r
->use_name
, sym
->name
) == 0) saw_sym
= true;
16812 gfc_error ("COMMON block member %qs at %L cannot be an "
16813 "EQUIVALENCE object in the pure procedure %qs",
16814 sym
->name
, &e
->where
, sym
->ns
->proc_name
->name
);
16818 /* Shall not be a named constant. */
16819 if (e
->expr_type
== EXPR_CONSTANT
)
16821 gfc_error ("Named constant %qs at %L cannot be an EQUIVALENCE "
16822 "object", sym
->name
, &e
->where
);
16826 if (e
->ts
.type
== BT_DERIVED
16827 && !resolve_equivalence_derived (e
->ts
.u
.derived
, sym
, e
))
16830 /* Check that the types correspond correctly:
16832 A numeric sequence structure may be equivalenced to another sequence
16833 structure, an object of default integer type, default real type, double
16834 precision real type, default logical type such that components of the
16835 structure ultimately only become associated to objects of the same
16836 kind. A character sequence structure may be equivalenced to an object
16837 of default character kind or another character sequence structure.
16838 Other objects may be equivalenced only to objects of the same type and
16839 kind parameters. */
16841 /* Identical types are unconditionally OK. */
16842 if (object
== 1 || gfc_compare_types (last_ts
, &sym
->ts
))
16843 goto identical_types
;
16845 last_eq_type
= sequence_type (*last_ts
);
16846 eq_type
= sequence_type (sym
->ts
);
16848 /* Since the pair of objects is not of the same type, mixed or
16849 non-default sequences can be rejected. */
16851 msg
= "Sequence %s with mixed components in EQUIVALENCE "
16852 "statement at %L with different type objects";
16854 && last_eq_type
== SEQ_MIXED
16855 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16856 || (eq_type
== SEQ_MIXED
16857 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16860 msg
= "Non-default type object or sequence %s in EQUIVALENCE "
16861 "statement at %L with objects of different type";
16863 && last_eq_type
== SEQ_NONDEFAULT
16864 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16865 || (eq_type
== SEQ_NONDEFAULT
16866 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16869 msg
="Non-CHARACTER object %qs in default CHARACTER "
16870 "EQUIVALENCE statement at %L";
16871 if (last_eq_type
== SEQ_CHARACTER
16872 && eq_type
!= SEQ_CHARACTER
16873 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16876 msg
="Non-NUMERIC object %qs in default NUMERIC "
16877 "EQUIVALENCE statement at %L";
16878 if (last_eq_type
== SEQ_NUMERIC
16879 && eq_type
!= SEQ_NUMERIC
16880 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16886 last_where
= &e
->where
;
16891 /* Shall not be an automatic array. */
16892 if (e
->ref
->type
== REF_ARRAY
&& is_non_constant_shape_array (sym
))
16894 gfc_error ("Array %qs at %L with non-constant bounds cannot be "
16895 "an EQUIVALENCE object", sym
->name
, &e
->where
);
16902 /* Shall not be a structure component. */
16903 if (r
->type
== REF_COMPONENT
)
16905 gfc_error ("Structure component %qs at %L cannot be an "
16906 "EQUIVALENCE object",
16907 r
->u
.c
.component
->name
, &e
->where
);
16911 /* A substring shall not have length zero. */
16912 if (r
->type
== REF_SUBSTRING
)
16914 if (compare_bound (r
->u
.ss
.start
, r
->u
.ss
.end
) == CMP_GT
)
16916 gfc_error ("Substring at %L has length zero",
16917 &r
->u
.ss
.start
->where
);
16927 /* Function called by resolve_fntype to flag other symbols used in the
16928 length type parameter specification of function results. */
16931 flag_fn_result_spec (gfc_expr
*expr
,
16933 int *f ATTRIBUTE_UNUSED
)
16938 if (expr
->expr_type
== EXPR_VARIABLE
)
16940 s
= expr
->symtree
->n
.sym
;
16941 for (ns
= s
->ns
; ns
; ns
= ns
->parent
)
16947 gfc_error ("Self reference in character length expression "
16948 "for %qs at %L", sym
->name
, &expr
->where
);
16952 if (!s
->fn_result_spec
16953 && s
->attr
.flavor
== FL_PARAMETER
)
16955 /* Function contained in a module.... */
16956 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_MODULE
)
16959 s
->fn_result_spec
= 1;
16960 /* Make sure that this symbol is translated as a module
16962 st
= gfc_get_unique_symtree (ns
);
16966 /* ... which is use associated and called. */
16967 else if (s
->attr
.use_assoc
|| s
->attr
.used_in_submodule
16969 /* External function matched with an interface. */
16972 && s
->ns
->proc_name
->attr
.if_source
== IFSRC_DECL
)
16973 || s
->ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16974 && s
->ns
->proc_name
->attr
.function
))
16975 s
->fn_result_spec
= 1;
16982 /* Resolve function and ENTRY types, issue diagnostics if needed. */
16985 resolve_fntype (gfc_namespace
*ns
)
16987 gfc_entry_list
*el
;
16990 if (ns
->proc_name
== NULL
|| !ns
->proc_name
->attr
.function
)
16993 /* If there are any entries, ns->proc_name is the entry master
16994 synthetic symbol and ns->entries->sym actual FUNCTION symbol. */
16996 sym
= ns
->entries
->sym
;
16998 sym
= ns
->proc_name
;
16999 if (sym
->result
== sym
17000 && sym
->ts
.type
== BT_UNKNOWN
17001 && !gfc_set_default_type (sym
, 0, NULL
)
17002 && !sym
->attr
.untyped
)
17004 gfc_error ("Function %qs at %L has no IMPLICIT type",
17005 sym
->name
, &sym
->declared_at
);
17006 sym
->attr
.untyped
= 1;
17009 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->ts
.u
.derived
->attr
.use_assoc
17010 && !sym
->attr
.contained
17011 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
17012 && gfc_check_symbol_access (sym
))
17014 gfc_notify_std (GFC_STD_F2003
, "PUBLIC function %qs at "
17015 "%L of PRIVATE type %qs", sym
->name
,
17016 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
17020 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
17022 if (el
->sym
->result
== el
->sym
17023 && el
->sym
->ts
.type
== BT_UNKNOWN
17024 && !gfc_set_default_type (el
->sym
, 0, NULL
)
17025 && !el
->sym
->attr
.untyped
)
17027 gfc_error ("ENTRY %qs at %L has no IMPLICIT type",
17028 el
->sym
->name
, &el
->sym
->declared_at
);
17029 el
->sym
->attr
.untyped
= 1;
17033 if (sym
->ts
.type
== BT_CHARACTER
)
17034 gfc_traverse_expr (sym
->ts
.u
.cl
->length
, sym
, flag_fn_result_spec
, 0);
17038 /* 12.3.2.1.1 Defined operators. */
17041 check_uop_procedure (gfc_symbol
*sym
, locus where
)
17043 gfc_formal_arglist
*formal
;
17045 if (!sym
->attr
.function
)
17047 gfc_error ("User operator procedure %qs at %L must be a FUNCTION",
17048 sym
->name
, &where
);
17052 if (sym
->ts
.type
== BT_CHARACTER
17053 && !((sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
) || sym
->ts
.deferred
)
17054 && !(sym
->result
&& ((sym
->result
->ts
.u
.cl
17055 && sym
->result
->ts
.u
.cl
->length
) || sym
->result
->ts
.deferred
)))
17057 gfc_error ("User operator procedure %qs at %L cannot be assumed "
17058 "character length", sym
->name
, &where
);
17062 formal
= gfc_sym_get_dummy_args (sym
);
17063 if (!formal
|| !formal
->sym
)
17065 gfc_error ("User operator procedure %qs at %L must have at least "
17066 "one argument", sym
->name
, &where
);
17070 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
17072 gfc_error ("First argument of operator interface at %L must be "
17073 "INTENT(IN)", &where
);
17077 if (formal
->sym
->attr
.optional
)
17079 gfc_error ("First argument of operator interface at %L cannot be "
17080 "optional", &where
);
17084 formal
= formal
->next
;
17085 if (!formal
|| !formal
->sym
)
17088 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
17090 gfc_error ("Second argument of operator interface at %L must be "
17091 "INTENT(IN)", &where
);
17095 if (formal
->sym
->attr
.optional
)
17097 gfc_error ("Second argument of operator interface at %L cannot be "
17098 "optional", &where
);
17104 gfc_error ("Operator interface at %L must have, at most, two "
17105 "arguments", &where
);
17113 gfc_resolve_uops (gfc_symtree
*symtree
)
17115 gfc_interface
*itr
;
17117 if (symtree
== NULL
)
17120 gfc_resolve_uops (symtree
->left
);
17121 gfc_resolve_uops (symtree
->right
);
17123 for (itr
= symtree
->n
.uop
->op
; itr
; itr
= itr
->next
)
17124 check_uop_procedure (itr
->sym
, itr
->sym
->declared_at
);
17128 /* Examine all of the expressions associated with a program unit,
17129 assign types to all intermediate expressions, make sure that all
17130 assignments are to compatible types and figure out which names
17131 refer to which functions or subroutines. It doesn't check code
17132 block, which is handled by gfc_resolve_code. */
17135 resolve_types (gfc_namespace
*ns
)
17141 gfc_namespace
* old_ns
= gfc_current_ns
;
17142 bool recursive
= ns
->proc_name
&& ns
->proc_name
->attr
.recursive
;
17144 if (ns
->types_resolved
)
17147 /* Check that all IMPLICIT types are ok. */
17148 if (!ns
->seen_implicit_none
)
17151 for (letter
= 0; letter
!= GFC_LETTERS
; ++letter
)
17152 if (ns
->set_flag
[letter
]
17153 && !resolve_typespec_used (&ns
->default_type
[letter
],
17154 &ns
->implicit_loc
[letter
], NULL
))
17158 gfc_current_ns
= ns
;
17160 resolve_entries (ns
);
17162 resolve_common_vars (&ns
->blank_common
, false);
17163 resolve_common_blocks (ns
->common_root
);
17165 resolve_contained_functions (ns
);
17167 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
17168 && ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
17169 gfc_resolve_formal_arglist (ns
->proc_name
);
17171 gfc_traverse_ns (ns
, resolve_bind_c_derived_types
);
17173 for (cl
= ns
->cl_list
; cl
; cl
= cl
->next
)
17174 resolve_charlen (cl
);
17176 gfc_traverse_ns (ns
, resolve_symbol
);
17178 resolve_fntype (ns
);
17180 for (n
= ns
->contained
; n
; n
= n
->sibling
)
17182 if (gfc_pure (ns
->proc_name
) && !gfc_pure (n
->proc_name
))
17183 gfc_error ("Contained procedure %qs at %L of a PURE procedure must "
17184 "also be PURE", n
->proc_name
->name
,
17185 &n
->proc_name
->declared_at
);
17191 gfc_do_concurrent_flag
= 0;
17192 gfc_check_interfaces (ns
);
17194 gfc_traverse_ns (ns
, resolve_values
);
17196 if (ns
->save_all
|| (!flag_automatic
&& !recursive
))
17200 for (d
= ns
->data
; d
; d
= d
->next
)
17204 gfc_traverse_ns (ns
, gfc_formalize_init_value
);
17206 gfc_traverse_ns (ns
, gfc_verify_binding_labels
);
17208 for (eq
= ns
->equiv
; eq
; eq
= eq
->next
)
17209 resolve_equivalence (eq
);
17211 /* Warn about unused labels. */
17212 if (warn_unused_label
)
17213 warn_unused_fortran_label (ns
->st_labels
);
17215 gfc_resolve_uops (ns
->uop_root
);
17217 gfc_traverse_ns (ns
, gfc_verify_DTIO_procedures
);
17219 gfc_resolve_omp_declare_simd (ns
);
17221 gfc_resolve_omp_udrs (ns
->omp_udr_root
);
17223 ns
->types_resolved
= 1;
17225 gfc_current_ns
= old_ns
;
17229 /* Call gfc_resolve_code recursively. */
17232 resolve_codes (gfc_namespace
*ns
)
17235 bitmap_obstack old_obstack
;
17237 if (ns
->resolved
== 1)
17240 for (n
= ns
->contained
; n
; n
= n
->sibling
)
17243 gfc_current_ns
= ns
;
17245 /* Don't clear 'cs_base' if this is the namespace of a BLOCK construct. */
17246 if (!(ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_LABEL
))
17249 /* Set to an out of range value. */
17250 current_entry_id
= -1;
17252 old_obstack
= labels_obstack
;
17253 bitmap_obstack_initialize (&labels_obstack
);
17255 gfc_resolve_oacc_declare (ns
);
17256 gfc_resolve_oacc_routines (ns
);
17257 gfc_resolve_omp_local_vars (ns
);
17258 gfc_resolve_code (ns
->code
, ns
);
17260 bitmap_obstack_release (&labels_obstack
);
17261 labels_obstack
= old_obstack
;
17265 /* This function is called after a complete program unit has been compiled.
17266 Its purpose is to examine all of the expressions associated with a program
17267 unit, assign types to all intermediate expressions, make sure that all
17268 assignments are to compatible types and figure out which names refer to
17269 which functions or subroutines. */
17272 gfc_resolve (gfc_namespace
*ns
)
17274 gfc_namespace
*old_ns
;
17275 code_stack
*old_cs_base
;
17276 struct gfc_omp_saved_state old_omp_state
;
17282 old_ns
= gfc_current_ns
;
17283 old_cs_base
= cs_base
;
17285 /* As gfc_resolve can be called during resolution of an OpenMP construct
17286 body, we should clear any state associated to it, so that say NS's
17287 DO loops are not interpreted as OpenMP loops. */
17288 if (!ns
->construct_entities
)
17289 gfc_omp_save_and_clear_state (&old_omp_state
);
17291 resolve_types (ns
);
17292 component_assignment_level
= 0;
17293 resolve_codes (ns
);
17295 gfc_current_ns
= old_ns
;
17296 cs_base
= old_cs_base
;
17299 gfc_run_passes (ns
);
17301 if (!ns
->construct_entities
)
17302 gfc_omp_restore_state (&old_omp_state
);