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
;
1759 /* Already resolved. */
1760 if (sym
->from_intmod
&& sym
->ts
.type
!= BT_UNKNOWN
)
1763 /* We already know this one is an intrinsic, so we don't call
1764 gfc_is_intrinsic for full checking but rather use gfc_find_function and
1765 gfc_find_subroutine directly to check whether it is a function or
1768 if (sym
->intmod_sym_id
&& sym
->attr
.subroutine
)
1770 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1771 isym
= gfc_intrinsic_subroutine_by_id (id
);
1773 else if (sym
->intmod_sym_id
)
1775 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1776 isym
= gfc_intrinsic_function_by_id (id
);
1778 else if (!sym
->attr
.subroutine
)
1779 isym
= gfc_find_function (sym
->name
);
1781 if (isym
&& !sym
->attr
.subroutine
)
1783 if (sym
->ts
.type
!= BT_UNKNOWN
&& warn_surprising
1784 && !sym
->attr
.implicit_type
)
1785 gfc_warning (OPT_Wsurprising
,
1786 "Type specified for intrinsic function %qs at %L is"
1787 " ignored", sym
->name
, &sym
->declared_at
);
1789 if (!sym
->attr
.function
&&
1790 !gfc_add_function(&sym
->attr
, sym
->name
, loc
))
1795 else if (isym
|| (isym
= gfc_find_subroutine (sym
->name
)))
1797 if (sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.implicit_type
)
1799 gfc_error ("Intrinsic subroutine %qs at %L shall not have a type"
1800 " specifier", sym
->name
, &sym
->declared_at
);
1804 if (!sym
->attr
.subroutine
&&
1805 !gfc_add_subroutine(&sym
->attr
, sym
->name
, loc
))
1810 gfc_error ("%qs declared INTRINSIC at %L does not exist", sym
->name
,
1815 gfc_copy_formal_args_intr (sym
, isym
, NULL
);
1817 sym
->attr
.pure
= isym
->pure
;
1818 sym
->attr
.elemental
= isym
->elemental
;
1820 /* Check it is actually available in the standard settings. */
1821 if (!gfc_check_intrinsic_standard (isym
, &symstd
, false, sym
->declared_at
))
1823 gfc_error ("The intrinsic %qs declared INTRINSIC at %L is not "
1824 "available in the current standard settings but %s. Use "
1825 "an appropriate %<-std=*%> option or enable "
1826 "%<-fall-intrinsics%> in order to use it.",
1827 sym
->name
, &sym
->declared_at
, symstd
);
1835 /* Resolve a procedure expression, like passing it to a called procedure or as
1836 RHS for a procedure pointer assignment. */
1839 resolve_procedure_expression (gfc_expr
* expr
)
1843 if (expr
->expr_type
!= EXPR_VARIABLE
)
1845 gcc_assert (expr
->symtree
);
1847 sym
= expr
->symtree
->n
.sym
;
1849 if (sym
->attr
.intrinsic
)
1850 gfc_resolve_intrinsic (sym
, &expr
->where
);
1852 if (sym
->attr
.flavor
!= FL_PROCEDURE
1853 || (sym
->attr
.function
&& sym
->result
== sym
))
1856 /* A non-RECURSIVE procedure that is used as procedure expression within its
1857 own body is in danger of being called recursively. */
1858 if (is_illegal_recursion (sym
, gfc_current_ns
))
1859 gfc_warning (0, "Non-RECURSIVE procedure %qs at %L is possibly calling"
1860 " itself recursively. Declare it RECURSIVE or use"
1861 " %<-frecursive%>", sym
->name
, &expr
->where
);
1867 /* Check that name is not a derived type. */
1870 is_dt_name (const char *name
)
1872 gfc_symbol
*dt_list
, *dt_first
;
1874 dt_list
= dt_first
= gfc_derived_types
;
1875 for (; dt_list
; dt_list
= dt_list
->dt_next
)
1877 if (strcmp(dt_list
->name
, name
) == 0)
1879 if (dt_first
== dt_list
->dt_next
)
1886 /* Resolve an actual argument list. Most of the time, this is just
1887 resolving the expressions in the list.
1888 The exception is that we sometimes have to decide whether arguments
1889 that look like procedure arguments are really simple variable
1893 resolve_actual_arglist (gfc_actual_arglist
*arg
, procedure_type ptype
,
1894 bool no_formal_args
)
1897 gfc_symtree
*parent_st
;
1899 gfc_component
*comp
;
1900 int save_need_full_assumed_size
;
1901 bool return_value
= false;
1902 bool actual_arg_sav
= actual_arg
, first_actual_arg_sav
= first_actual_arg
;
1905 first_actual_arg
= true;
1907 for (; arg
; arg
= arg
->next
)
1912 /* Check the label is a valid branching target. */
1915 if (arg
->label
->defined
== ST_LABEL_UNKNOWN
)
1917 gfc_error ("Label %d referenced at %L is never defined",
1918 arg
->label
->value
, &arg
->label
->where
);
1922 first_actual_arg
= false;
1926 if (e
->expr_type
== EXPR_VARIABLE
1927 && e
->symtree
->n
.sym
->attr
.generic
1929 && count_specific_procs (e
) != 1)
1932 if (e
->ts
.type
!= BT_PROCEDURE
)
1934 save_need_full_assumed_size
= need_full_assumed_size
;
1935 if (e
->expr_type
!= EXPR_VARIABLE
)
1936 need_full_assumed_size
= 0;
1937 if (!gfc_resolve_expr (e
))
1939 need_full_assumed_size
= save_need_full_assumed_size
;
1943 /* See if the expression node should really be a variable reference. */
1945 sym
= e
->symtree
->n
.sym
;
1947 if (sym
->attr
.flavor
== FL_PROCEDURE
&& is_dt_name (sym
->name
))
1949 gfc_error ("Derived type %qs is used as an actual "
1950 "argument at %L", sym
->name
, &e
->where
);
1954 if (sym
->attr
.flavor
== FL_PROCEDURE
1955 || sym
->attr
.intrinsic
1956 || sym
->attr
.external
)
1960 /* If a procedure is not already determined to be something else
1961 check if it is intrinsic. */
1962 if (gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, e
->where
))
1963 sym
->attr
.intrinsic
= 1;
1965 if (sym
->attr
.proc
== PROC_ST_FUNCTION
)
1967 gfc_error ("Statement function %qs at %L is not allowed as an "
1968 "actual argument", sym
->name
, &e
->where
);
1971 actual_ok
= gfc_intrinsic_actual_ok (sym
->name
,
1972 sym
->attr
.subroutine
);
1973 if (sym
->attr
.intrinsic
&& actual_ok
== 0)
1975 gfc_error ("Intrinsic %qs at %L is not allowed as an "
1976 "actual argument", sym
->name
, &e
->where
);
1979 if (sym
->attr
.contained
&& !sym
->attr
.use_assoc
1980 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
1982 if (!gfc_notify_std (GFC_STD_F2008
, "Internal procedure %qs is"
1983 " used as actual argument at %L",
1984 sym
->name
, &e
->where
))
1988 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
)
1990 gfc_error ("ELEMENTAL non-INTRINSIC procedure %qs is not "
1991 "allowed as an actual argument at %L", sym
->name
,
1995 /* Check if a generic interface has a specific procedure
1996 with the same name before emitting an error. */
1997 if (sym
->attr
.generic
&& count_specific_procs (e
) != 1)
2000 /* Just in case a specific was found for the expression. */
2001 sym
= e
->symtree
->n
.sym
;
2003 /* If the symbol is the function that names the current (or
2004 parent) scope, then we really have a variable reference. */
2006 if (gfc_is_function_return_value (sym
, sym
->ns
))
2009 /* If all else fails, see if we have a specific intrinsic. */
2010 if (sym
->ts
.type
== BT_UNKNOWN
&& sym
->attr
.intrinsic
)
2012 gfc_intrinsic_sym
*isym
;
2014 isym
= gfc_find_function (sym
->name
);
2015 if (isym
== NULL
|| !isym
->specific
)
2017 gfc_error ("Unable to find a specific INTRINSIC procedure "
2018 "for the reference %qs at %L", sym
->name
,
2023 sym
->attr
.intrinsic
= 1;
2024 sym
->attr
.function
= 1;
2027 if (!gfc_resolve_expr (e
))
2032 /* See if the name is a module procedure in a parent unit. */
2034 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
2037 if (gfc_find_sym_tree (sym
->name
, sym
->ns
->parent
, 1, &parent_st
))
2039 gfc_error ("Symbol %qs at %L is ambiguous", sym
->name
, &e
->where
);
2043 if (parent_st
== NULL
)
2046 sym
= parent_st
->n
.sym
;
2047 e
->symtree
= parent_st
; /* Point to the right thing. */
2049 if (sym
->attr
.flavor
== FL_PROCEDURE
2050 || sym
->attr
.intrinsic
2051 || sym
->attr
.external
)
2053 if (!gfc_resolve_expr (e
))
2059 e
->expr_type
= EXPR_VARIABLE
;
2061 if ((sym
->as
!= NULL
&& sym
->ts
.type
!= BT_CLASS
)
2062 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
2063 && CLASS_DATA (sym
)->as
))
2065 e
->rank
= sym
->ts
.type
== BT_CLASS
2066 ? CLASS_DATA (sym
)->as
->rank
: sym
->as
->rank
;
2067 e
->ref
= gfc_get_ref ();
2068 e
->ref
->type
= REF_ARRAY
;
2069 e
->ref
->u
.ar
.type
= AR_FULL
;
2070 e
->ref
->u
.ar
.as
= sym
->ts
.type
== BT_CLASS
2071 ? CLASS_DATA (sym
)->as
: sym
->as
;
2074 /* Expressions are assigned a default ts.type of BT_PROCEDURE in
2075 primary.c (match_actual_arg). If above code determines that it
2076 is a variable instead, it needs to be resolved as it was not
2077 done at the beginning of this function. */
2078 save_need_full_assumed_size
= need_full_assumed_size
;
2079 if (e
->expr_type
!= EXPR_VARIABLE
)
2080 need_full_assumed_size
= 0;
2081 if (!gfc_resolve_expr (e
))
2083 need_full_assumed_size
= save_need_full_assumed_size
;
2086 /* Check argument list functions %VAL, %LOC and %REF. There is
2087 nothing to do for %REF. */
2088 if (arg
->name
&& arg
->name
[0] == '%')
2090 if (strcmp ("%VAL", arg
->name
) == 0)
2092 if (e
->ts
.type
== BT_CHARACTER
|| e
->ts
.type
== BT_DERIVED
)
2094 gfc_error ("By-value argument at %L is not of numeric "
2101 gfc_error ("By-value argument at %L cannot be an array or "
2102 "an array section", &e
->where
);
2106 /* Intrinsics are still PROC_UNKNOWN here. However,
2107 since same file external procedures are not resolvable
2108 in gfortran, it is a good deal easier to leave them to
2110 if (ptype
!= PROC_UNKNOWN
2111 && ptype
!= PROC_DUMMY
2112 && ptype
!= PROC_EXTERNAL
2113 && ptype
!= PROC_MODULE
)
2115 gfc_error ("By-value argument at %L is not allowed "
2116 "in this context", &e
->where
);
2121 /* Statement functions have already been excluded above. */
2122 else if (strcmp ("%LOC", arg
->name
) == 0
2123 && e
->ts
.type
== BT_PROCEDURE
)
2125 if (e
->symtree
->n
.sym
->attr
.proc
== PROC_INTERNAL
)
2127 gfc_error ("Passing internal procedure at %L by location "
2128 "not allowed", &e
->where
);
2134 comp
= gfc_get_proc_ptr_comp(e
);
2135 if (e
->expr_type
== EXPR_VARIABLE
2136 && comp
&& comp
->attr
.elemental
)
2138 gfc_error ("ELEMENTAL procedure pointer component %qs is not "
2139 "allowed as an actual argument at %L", comp
->name
,
2143 /* Fortran 2008, C1237. */
2144 if (e
->expr_type
== EXPR_VARIABLE
&& gfc_is_coindexed (e
)
2145 && gfc_has_ultimate_pointer (e
))
2147 gfc_error ("Coindexed actual argument at %L with ultimate pointer "
2148 "component", &e
->where
);
2152 first_actual_arg
= false;
2155 return_value
= true;
2158 actual_arg
= actual_arg_sav
;
2159 first_actual_arg
= first_actual_arg_sav
;
2161 return return_value
;
2165 /* Do the checks of the actual argument list that are specific to elemental
2166 procedures. If called with c == NULL, we have a function, otherwise if
2167 expr == NULL, we have a subroutine. */
2170 resolve_elemental_actual (gfc_expr
*expr
, gfc_code
*c
)
2172 gfc_actual_arglist
*arg0
;
2173 gfc_actual_arglist
*arg
;
2174 gfc_symbol
*esym
= NULL
;
2175 gfc_intrinsic_sym
*isym
= NULL
;
2177 gfc_intrinsic_arg
*iformal
= NULL
;
2178 gfc_formal_arglist
*eformal
= NULL
;
2179 bool formal_optional
= false;
2180 bool set_by_optional
= false;
2184 /* Is this an elemental procedure? */
2185 if (expr
&& expr
->value
.function
.actual
!= NULL
)
2187 if (expr
->value
.function
.esym
!= NULL
2188 && expr
->value
.function
.esym
->attr
.elemental
)
2190 arg0
= expr
->value
.function
.actual
;
2191 esym
= expr
->value
.function
.esym
;
2193 else if (expr
->value
.function
.isym
!= NULL
2194 && expr
->value
.function
.isym
->elemental
)
2196 arg0
= expr
->value
.function
.actual
;
2197 isym
= expr
->value
.function
.isym
;
2202 else if (c
&& c
->ext
.actual
!= NULL
)
2204 arg0
= c
->ext
.actual
;
2206 if (c
->resolved_sym
)
2207 esym
= c
->resolved_sym
;
2209 esym
= c
->symtree
->n
.sym
;
2212 if (!esym
->attr
.elemental
)
2218 /* The rank of an elemental is the rank of its array argument(s). */
2219 for (arg
= arg0
; arg
; arg
= arg
->next
)
2221 if (arg
->expr
!= NULL
&& arg
->expr
->rank
!= 0)
2223 rank
= arg
->expr
->rank
;
2224 if (arg
->expr
->expr_type
== EXPR_VARIABLE
2225 && arg
->expr
->symtree
->n
.sym
->attr
.optional
)
2226 set_by_optional
= true;
2228 /* Function specific; set the result rank and shape. */
2232 if (!expr
->shape
&& arg
->expr
->shape
)
2234 expr
->shape
= gfc_get_shape (rank
);
2235 for (i
= 0; i
< rank
; i
++)
2236 mpz_init_set (expr
->shape
[i
], arg
->expr
->shape
[i
]);
2243 /* If it is an array, it shall not be supplied as an actual argument
2244 to an elemental procedure unless an array of the same rank is supplied
2245 as an actual argument corresponding to a nonoptional dummy argument of
2246 that elemental procedure(12.4.1.5). */
2247 formal_optional
= false;
2249 iformal
= isym
->formal
;
2251 eformal
= esym
->formal
;
2253 for (arg
= arg0
; arg
; arg
= arg
->next
)
2257 if (eformal
->sym
&& eformal
->sym
->attr
.optional
)
2258 formal_optional
= true;
2259 eformal
= eformal
->next
;
2261 else if (isym
&& iformal
)
2263 if (iformal
->optional
)
2264 formal_optional
= true;
2265 iformal
= iformal
->next
;
2268 formal_optional
= true;
2270 if (pedantic
&& arg
->expr
!= NULL
2271 && arg
->expr
->expr_type
== EXPR_VARIABLE
2272 && arg
->expr
->symtree
->n
.sym
->attr
.optional
2275 && (set_by_optional
|| arg
->expr
->rank
!= rank
)
2276 && !(isym
&& isym
->id
== GFC_ISYM_CONVERSION
))
2278 gfc_warning (OPT_Wpedantic
,
2279 "%qs at %L is an array and OPTIONAL; IF IT IS "
2280 "MISSING, it cannot be the actual argument of an "
2281 "ELEMENTAL procedure unless there is a non-optional "
2282 "argument with the same rank (12.4.1.5)",
2283 arg
->expr
->symtree
->n
.sym
->name
, &arg
->expr
->where
);
2287 for (arg
= arg0
; arg
; arg
= arg
->next
)
2289 if (arg
->expr
== NULL
|| arg
->expr
->rank
== 0)
2292 /* Being elemental, the last upper bound of an assumed size array
2293 argument must be present. */
2294 if (resolve_assumed_size_actual (arg
->expr
))
2297 /* Elemental procedure's array actual arguments must conform. */
2300 if (!gfc_check_conformance (arg
->expr
, e
, "elemental procedure"))
2307 /* INTENT(OUT) is only allowed for subroutines; if any actual argument
2308 is an array, the intent inout/out variable needs to be also an array. */
2309 if (rank
> 0 && esym
&& expr
== NULL
)
2310 for (eformal
= esym
->formal
, arg
= arg0
; arg
&& eformal
;
2311 arg
= arg
->next
, eformal
= eformal
->next
)
2312 if ((eformal
->sym
->attr
.intent
== INTENT_OUT
2313 || eformal
->sym
->attr
.intent
== INTENT_INOUT
)
2314 && arg
->expr
&& arg
->expr
->rank
== 0)
2316 gfc_error ("Actual argument at %L for INTENT(%s) dummy %qs of "
2317 "ELEMENTAL subroutine %qs is a scalar, but another "
2318 "actual argument is an array", &arg
->expr
->where
,
2319 (eformal
->sym
->attr
.intent
== INTENT_OUT
) ? "OUT"
2320 : "INOUT", eformal
->sym
->name
, esym
->name
);
2327 /* This function does the checking of references to global procedures
2328 as defined in sections 18.1 and 14.1, respectively, of the Fortran
2329 77 and 95 standards. It checks for a gsymbol for the name, making
2330 one if it does not already exist. If it already exists, then the
2331 reference being resolved must correspond to the type of gsymbol.
2332 Otherwise, the new symbol is equipped with the attributes of the
2333 reference. The corresponding code that is called in creating
2334 global entities is parse.c.
2336 In addition, for all but -std=legacy, the gsymbols are used to
2337 check the interfaces of external procedures from the same file.
2338 The namespace of the gsymbol is resolved and then, once this is
2339 done the interface is checked. */
2343 not_in_recursive (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2345 if (!gsym_ns
->proc_name
->attr
.recursive
)
2348 if (sym
->ns
== gsym_ns
)
2351 if (sym
->ns
->parent
&& sym
->ns
->parent
== gsym_ns
)
2358 not_entry_self_reference (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2360 if (gsym_ns
->entries
)
2362 gfc_entry_list
*entry
= gsym_ns
->entries
;
2364 for (; entry
; entry
= entry
->next
)
2366 if (strcmp (sym
->name
, entry
->sym
->name
) == 0)
2368 if (strcmp (gsym_ns
->proc_name
->name
,
2369 sym
->ns
->proc_name
->name
) == 0)
2373 && strcmp (gsym_ns
->proc_name
->name
,
2374 sym
->ns
->parent
->proc_name
->name
) == 0)
2383 /* Check for the requirement of an explicit interface. F08:12.4.2.2. */
2386 gfc_explicit_interface_required (gfc_symbol
*sym
, char *errmsg
, int err_len
)
2388 gfc_formal_arglist
*arg
= gfc_sym_get_dummy_args (sym
);
2390 for ( ; arg
; arg
= arg
->next
)
2395 if (arg
->sym
->attr
.allocatable
) /* (2a) */
2397 strncpy (errmsg
, _("allocatable argument"), err_len
);
2400 else if (arg
->sym
->attr
.asynchronous
)
2402 strncpy (errmsg
, _("asynchronous argument"), err_len
);
2405 else if (arg
->sym
->attr
.optional
)
2407 strncpy (errmsg
, _("optional argument"), err_len
);
2410 else if (arg
->sym
->attr
.pointer
)
2412 strncpy (errmsg
, _("pointer argument"), err_len
);
2415 else if (arg
->sym
->attr
.target
)
2417 strncpy (errmsg
, _("target argument"), err_len
);
2420 else if (arg
->sym
->attr
.value
)
2422 strncpy (errmsg
, _("value argument"), err_len
);
2425 else if (arg
->sym
->attr
.volatile_
)
2427 strncpy (errmsg
, _("volatile argument"), err_len
);
2430 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_SHAPE
) /* (2b) */
2432 strncpy (errmsg
, _("assumed-shape argument"), err_len
);
2435 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_RANK
) /* TS 29113, 6.2. */
2437 strncpy (errmsg
, _("assumed-rank argument"), err_len
);
2440 else if (arg
->sym
->attr
.codimension
) /* (2c) */
2442 strncpy (errmsg
, _("coarray argument"), err_len
);
2445 else if (false) /* (2d) TODO: parametrized derived type */
2447 strncpy (errmsg
, _("parametrized derived type argument"), err_len
);
2450 else if (arg
->sym
->ts
.type
== BT_CLASS
) /* (2e) */
2452 strncpy (errmsg
, _("polymorphic argument"), err_len
);
2455 else if (arg
->sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
2457 strncpy (errmsg
, _("NO_ARG_CHECK attribute"), err_len
);
2460 else if (arg
->sym
->ts
.type
== BT_ASSUMED
)
2462 /* As assumed-type is unlimited polymorphic (cf. above).
2463 See also TS 29113, Note 6.1. */
2464 strncpy (errmsg
, _("assumed-type argument"), err_len
);
2469 if (sym
->attr
.function
)
2471 gfc_symbol
*res
= sym
->result
? sym
->result
: sym
;
2473 if (res
->attr
.dimension
) /* (3a) */
2475 strncpy (errmsg
, _("array result"), err_len
);
2478 else if (res
->attr
.pointer
|| res
->attr
.allocatable
) /* (3b) */
2480 strncpy (errmsg
, _("pointer or allocatable result"), err_len
);
2483 else if (res
->ts
.type
== BT_CHARACTER
&& res
->ts
.u
.cl
2484 && res
->ts
.u
.cl
->length
2485 && res
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
) /* (3c) */
2487 strncpy (errmsg
, _("result with non-constant character length"), err_len
);
2492 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
) /* (4) */
2494 strncpy (errmsg
, _("elemental procedure"), err_len
);
2497 else if (sym
->attr
.is_bind_c
) /* (5) */
2499 strncpy (errmsg
, _("bind(c) procedure"), err_len
);
2508 resolve_global_procedure (gfc_symbol
*sym
, locus
*where
, int sub
)
2512 enum gfc_symbol_type type
;
2515 type
= sub
? GSYM_SUBROUTINE
: GSYM_FUNCTION
;
2517 gsym
= gfc_get_gsymbol (sym
->binding_label
? sym
->binding_label
: sym
->name
,
2518 sym
->binding_label
!= NULL
);
2520 if ((gsym
->type
!= GSYM_UNKNOWN
&& gsym
->type
!= type
))
2521 gfc_global_used (gsym
, where
);
2523 if ((sym
->attr
.if_source
== IFSRC_UNKNOWN
2524 || sym
->attr
.if_source
== IFSRC_IFBODY
)
2525 && gsym
->type
!= GSYM_UNKNOWN
2526 && !gsym
->binding_label
2528 && gsym
->ns
->proc_name
2529 && not_in_recursive (sym
, gsym
->ns
)
2530 && not_entry_self_reference (sym
, gsym
->ns
))
2532 gfc_symbol
*def_sym
;
2533 def_sym
= gsym
->ns
->proc_name
;
2535 if (gsym
->ns
->resolved
!= -1)
2538 /* Resolve the gsymbol namespace if needed. */
2539 if (!gsym
->ns
->resolved
)
2541 gfc_symbol
*old_dt_list
;
2543 /* Stash away derived types so that the backend_decls
2544 do not get mixed up. */
2545 old_dt_list
= gfc_derived_types
;
2546 gfc_derived_types
= NULL
;
2548 gfc_resolve (gsym
->ns
);
2550 /* Store the new derived types with the global namespace. */
2551 if (gfc_derived_types
)
2552 gsym
->ns
->derived_types
= gfc_derived_types
;
2554 /* Restore the derived types of this namespace. */
2555 gfc_derived_types
= old_dt_list
;
2558 /* Make sure that translation for the gsymbol occurs before
2559 the procedure currently being resolved. */
2560 ns
= gfc_global_ns_list
;
2561 for (; ns
&& ns
!= gsym
->ns
; ns
= ns
->sibling
)
2563 if (ns
->sibling
== gsym
->ns
)
2565 ns
->sibling
= gsym
->ns
->sibling
;
2566 gsym
->ns
->sibling
= gfc_global_ns_list
;
2567 gfc_global_ns_list
= gsym
->ns
;
2572 /* This can happen if a binding name has been specified. */
2573 if (gsym
->binding_label
&& gsym
->sym_name
!= def_sym
->name
)
2574 gfc_find_symbol (gsym
->sym_name
, gsym
->ns
, 0, &def_sym
);
2576 if (def_sym
->attr
.entry_master
|| def_sym
->attr
.entry
)
2578 gfc_entry_list
*entry
;
2579 for (entry
= gsym
->ns
->entries
; entry
; entry
= entry
->next
)
2580 if (strcmp (entry
->sym
->name
, sym
->name
) == 0)
2582 def_sym
= entry
->sym
;
2588 if (sym
->attr
.function
&& !gfc_compare_types (&sym
->ts
, &def_sym
->ts
))
2590 gfc_error ("Return type mismatch of function %qs at %L (%s/%s)",
2591 sym
->name
, &sym
->declared_at
, gfc_typename (&sym
->ts
),
2592 gfc_typename (&def_sym
->ts
));
2596 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
2597 && gfc_explicit_interface_required (def_sym
, reason
, sizeof(reason
)))
2599 gfc_error ("Explicit interface required for %qs at %L: %s",
2600 sym
->name
, &sym
->declared_at
, reason
);
2604 if (!pedantic
&& (gfc_option
.allow_std
& GFC_STD_GNU
))
2605 /* Turn erros into warnings with -std=gnu and -std=legacy. */
2606 gfc_errors_to_warnings (true);
2608 if (!gfc_compare_interfaces (sym
, def_sym
, sym
->name
, 0, 1,
2609 reason
, sizeof(reason
), NULL
, NULL
))
2611 gfc_error_opt (0, "Interface mismatch in global procedure %qs at %L:"
2612 " %s", sym
->name
, &sym
->declared_at
, reason
);
2618 gfc_errors_to_warnings (false);
2620 if (gsym
->type
== GSYM_UNKNOWN
)
2623 gsym
->where
= *where
;
2630 /************* Function resolution *************/
2632 /* Resolve a function call known to be generic.
2633 Section 14.1.2.4.1. */
2636 resolve_generic_f0 (gfc_expr
*expr
, gfc_symbol
*sym
)
2640 if (sym
->attr
.generic
)
2642 s
= gfc_search_interface (sym
->generic
, 0, &expr
->value
.function
.actual
);
2645 expr
->value
.function
.name
= s
->name
;
2646 expr
->value
.function
.esym
= s
;
2648 if (s
->ts
.type
!= BT_UNKNOWN
)
2650 else if (s
->result
!= NULL
&& s
->result
->ts
.type
!= BT_UNKNOWN
)
2651 expr
->ts
= s
->result
->ts
;
2654 expr
->rank
= s
->as
->rank
;
2655 else if (s
->result
!= NULL
&& s
->result
->as
!= NULL
)
2656 expr
->rank
= s
->result
->as
->rank
;
2658 gfc_set_sym_referenced (expr
->value
.function
.esym
);
2663 /* TODO: Need to search for elemental references in generic
2667 if (sym
->attr
.intrinsic
)
2668 return gfc_intrinsic_func_interface (expr
, 0);
2675 resolve_generic_f (gfc_expr
*expr
)
2679 gfc_interface
*intr
= NULL
;
2681 sym
= expr
->symtree
->n
.sym
;
2685 m
= resolve_generic_f0 (expr
, sym
);
2688 else if (m
== MATCH_ERROR
)
2693 for (intr
= sym
->generic
; intr
; intr
= intr
->next
)
2694 if (gfc_fl_struct (intr
->sym
->attr
.flavor
))
2697 if (sym
->ns
->parent
== NULL
)
2699 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2703 if (!generic_sym (sym
))
2707 /* Last ditch attempt. See if the reference is to an intrinsic
2708 that possesses a matching interface. 14.1.2.4 */
2709 if (sym
&& !intr
&& !gfc_is_intrinsic (sym
, 0, expr
->where
))
2711 if (gfc_init_expr_flag
)
2712 gfc_error ("Function %qs in initialization expression at %L "
2713 "must be an intrinsic function",
2714 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2716 gfc_error ("There is no specific function for the generic %qs "
2717 "at %L", expr
->symtree
->n
.sym
->name
, &expr
->where
);
2723 if (!gfc_convert_to_structure_constructor (expr
, intr
->sym
, NULL
,
2726 if (!gfc_use_derived (expr
->ts
.u
.derived
))
2728 return resolve_structure_cons (expr
, 0);
2731 m
= gfc_intrinsic_func_interface (expr
, 0);
2736 gfc_error ("Generic function %qs at %L is not consistent with a "
2737 "specific intrinsic interface", expr
->symtree
->n
.sym
->name
,
2744 /* Resolve a function call known to be specific. */
2747 resolve_specific_f0 (gfc_symbol
*sym
, gfc_expr
*expr
)
2751 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
2753 if (sym
->attr
.dummy
)
2755 sym
->attr
.proc
= PROC_DUMMY
;
2759 sym
->attr
.proc
= PROC_EXTERNAL
;
2763 if (sym
->attr
.proc
== PROC_MODULE
2764 || sym
->attr
.proc
== PROC_ST_FUNCTION
2765 || sym
->attr
.proc
== PROC_INTERNAL
)
2768 if (sym
->attr
.intrinsic
)
2770 m
= gfc_intrinsic_func_interface (expr
, 1);
2774 gfc_error ("Function %qs at %L is INTRINSIC but is not compatible "
2775 "with an intrinsic", sym
->name
, &expr
->where
);
2783 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2786 expr
->ts
= sym
->result
->ts
;
2789 expr
->value
.function
.name
= sym
->name
;
2790 expr
->value
.function
.esym
= sym
;
2791 /* Prevent crash when sym->ts.u.derived->components is not set due to previous
2793 if (sym
->ts
.type
== BT_CLASS
&& !CLASS_DATA (sym
))
2795 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)
2796 expr
->rank
= CLASS_DATA (sym
)->as
->rank
;
2797 else if (sym
->as
!= NULL
)
2798 expr
->rank
= sym
->as
->rank
;
2805 resolve_specific_f (gfc_expr
*expr
)
2810 sym
= expr
->symtree
->n
.sym
;
2814 m
= resolve_specific_f0 (sym
, expr
);
2817 if (m
== MATCH_ERROR
)
2820 if (sym
->ns
->parent
== NULL
)
2823 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2829 gfc_error ("Unable to resolve the specific function %qs at %L",
2830 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2835 /* Recursively append candidate SYM to CANDIDATES. Store the number of
2836 candidates in CANDIDATES_LEN. */
2839 lookup_function_fuzzy_find_candidates (gfc_symtree
*sym
,
2841 size_t &candidates_len
)
2847 if ((sym
->n
.sym
->ts
.type
!= BT_UNKNOWN
|| sym
->n
.sym
->attr
.external
)
2848 && sym
->n
.sym
->attr
.flavor
== FL_PROCEDURE
)
2849 vec_push (candidates
, candidates_len
, sym
->name
);
2853 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2857 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2861 /* Lookup function FN fuzzily, taking names in SYMROOT into account. */
2864 gfc_lookup_function_fuzzy (const char *fn
, gfc_symtree
*symroot
)
2866 char **candidates
= NULL
;
2867 size_t candidates_len
= 0;
2868 lookup_function_fuzzy_find_candidates (symroot
, candidates
, candidates_len
);
2869 return gfc_closest_fuzzy_match (fn
, candidates
);
2873 /* Resolve a procedure call not known to be generic nor specific. */
2876 resolve_unknown_f (gfc_expr
*expr
)
2881 sym
= expr
->symtree
->n
.sym
;
2883 if (sym
->attr
.dummy
)
2885 sym
->attr
.proc
= PROC_DUMMY
;
2886 expr
->value
.function
.name
= sym
->name
;
2890 /* See if we have an intrinsic function reference. */
2892 if (gfc_is_intrinsic (sym
, 0, expr
->where
))
2894 if (gfc_intrinsic_func_interface (expr
, 1) == MATCH_YES
)
2899 /* The reference is to an external name. */
2901 sym
->attr
.proc
= PROC_EXTERNAL
;
2902 expr
->value
.function
.name
= sym
->name
;
2903 expr
->value
.function
.esym
= expr
->symtree
->n
.sym
;
2905 if (sym
->as
!= NULL
)
2906 expr
->rank
= sym
->as
->rank
;
2908 /* Type of the expression is either the type of the symbol or the
2909 default type of the symbol. */
2912 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2914 if (sym
->ts
.type
!= BT_UNKNOWN
)
2918 ts
= gfc_get_default_type (sym
->name
, sym
->ns
);
2920 if (ts
->type
== BT_UNKNOWN
)
2923 = gfc_lookup_function_fuzzy (sym
->name
, sym
->ns
->sym_root
);
2925 gfc_error ("Function %qs at %L has no IMPLICIT type"
2926 "; did you mean %qs?",
2927 sym
->name
, &expr
->where
, guessed
);
2929 gfc_error ("Function %qs at %L has no IMPLICIT type",
2930 sym
->name
, &expr
->where
);
2941 /* Return true, if the symbol is an external procedure. */
2943 is_external_proc (gfc_symbol
*sym
)
2945 if (!sym
->attr
.dummy
&& !sym
->attr
.contained
2946 && !gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, sym
->declared_at
)
2947 && sym
->attr
.proc
!= PROC_ST_FUNCTION
2948 && !sym
->attr
.proc_pointer
2949 && !sym
->attr
.use_assoc
2957 /* Figure out if a function reference is pure or not. Also set the name
2958 of the function for a potential error message. Return nonzero if the
2959 function is PURE, zero if not. */
2961 pure_stmt_function (gfc_expr
*, gfc_symbol
*);
2964 gfc_pure_function (gfc_expr
*e
, const char **name
)
2967 gfc_component
*comp
;
2971 if (e
->symtree
!= NULL
2972 && e
->symtree
->n
.sym
!= NULL
2973 && e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
2974 return pure_stmt_function (e
, e
->symtree
->n
.sym
);
2976 comp
= gfc_get_proc_ptr_comp (e
);
2979 pure
= gfc_pure (comp
->ts
.interface
);
2982 else if (e
->value
.function
.esym
)
2984 pure
= gfc_pure (e
->value
.function
.esym
);
2985 *name
= e
->value
.function
.esym
->name
;
2987 else if (e
->value
.function
.isym
)
2989 pure
= e
->value
.function
.isym
->pure
2990 || e
->value
.function
.isym
->elemental
;
2991 *name
= e
->value
.function
.isym
->name
;
2995 /* Implicit functions are not pure. */
2997 *name
= e
->value
.function
.name
;
3004 /* Check if the expression is a reference to an implicitly pure function. */
3007 gfc_implicit_pure_function (gfc_expr
*e
)
3009 gfc_component
*comp
= gfc_get_proc_ptr_comp (e
);
3011 return gfc_implicit_pure (comp
->ts
.interface
);
3012 else if (e
->value
.function
.esym
)
3013 return gfc_implicit_pure (e
->value
.function
.esym
);
3020 impure_stmt_fcn (gfc_expr
*e
, gfc_symbol
*sym
,
3021 int *f ATTRIBUTE_UNUSED
)
3025 /* Don't bother recursing into other statement functions
3026 since they will be checked individually for purity. */
3027 if (e
->expr_type
!= EXPR_FUNCTION
3029 || e
->symtree
->n
.sym
== sym
3030 || e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
3033 return gfc_pure_function (e
, &name
) ? false : true;
3038 pure_stmt_function (gfc_expr
*e
, gfc_symbol
*sym
)
3040 return gfc_traverse_expr (e
, sym
, impure_stmt_fcn
, 0) ? 0 : 1;
3044 /* Check if an impure function is allowed in the current context. */
3046 static bool check_pure_function (gfc_expr
*e
)
3048 const char *name
= NULL
;
3049 if (!gfc_pure_function (e
, &name
) && name
)
3053 gfc_error ("Reference to impure function %qs at %L inside a "
3054 "FORALL %s", name
, &e
->where
,
3055 forall_flag
== 2 ? "mask" : "block");
3058 else if (gfc_do_concurrent_flag
)
3060 gfc_error ("Reference to impure function %qs at %L inside a "
3061 "DO CONCURRENT %s", name
, &e
->where
,
3062 gfc_do_concurrent_flag
== 2 ? "mask" : "block");
3065 else if (gfc_pure (NULL
))
3067 gfc_error ("Reference to impure function %qs at %L "
3068 "within a PURE procedure", name
, &e
->where
);
3071 if (!gfc_implicit_pure_function (e
))
3072 gfc_unset_implicit_pure (NULL
);
3078 /* Update current procedure's array_outer_dependency flag, considering
3079 a call to procedure SYM. */
3082 update_current_proc_array_outer_dependency (gfc_symbol
*sym
)
3084 /* Check to see if this is a sibling function that has not yet
3086 gfc_namespace
*sibling
= gfc_current_ns
->sibling
;
3087 for (; sibling
; sibling
= sibling
->sibling
)
3089 if (sibling
->proc_name
== sym
)
3091 gfc_resolve (sibling
);
3096 /* If SYM has references to outer arrays, so has the procedure calling
3097 SYM. If SYM is a procedure pointer, we can assume the worst. */
3098 if ((sym
->attr
.array_outer_dependency
|| sym
->attr
.proc_pointer
)
3099 && gfc_current_ns
->proc_name
)
3100 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3104 /* Resolve a function call, which means resolving the arguments, then figuring
3105 out which entity the name refers to. */
3108 resolve_function (gfc_expr
*expr
)
3110 gfc_actual_arglist
*arg
;
3114 procedure_type p
= PROC_INTRINSIC
;
3115 bool no_formal_args
;
3119 sym
= expr
->symtree
->n
.sym
;
3121 /* If this is a procedure pointer component, it has already been resolved. */
3122 if (gfc_is_proc_ptr_comp (expr
))
3125 /* Avoid re-resolving the arguments of caf_get, which can lead to inserting
3127 if (sym
&& sym
->attr
.intrinsic
3128 && (sym
->intmod_sym_id
== GFC_ISYM_CAF_GET
3129 || sym
->intmod_sym_id
== GFC_ISYM_CAF_SEND
))
3134 gfc_error ("Unexpected junk after %qs at %L", expr
->symtree
->n
.sym
->name
,
3139 if (sym
&& sym
->attr
.intrinsic
3140 && !gfc_resolve_intrinsic (sym
, &expr
->where
))
3143 if (sym
&& (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.subroutine
))
3145 gfc_error ("%qs at %L is not a function", sym
->name
, &expr
->where
);
3149 /* If this is a deferred TBP with an abstract interface (which may
3150 of course be referenced), expr->value.function.esym will be set. */
3151 if (sym
&& sym
->attr
.abstract
&& !expr
->value
.function
.esym
)
3153 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3154 sym
->name
, &expr
->where
);
3158 /* If this is a deferred TBP with an abstract interface, its result
3159 cannot be an assumed length character (F2003: C418). */
3160 if (sym
&& sym
->attr
.abstract
&& sym
->attr
.function
3161 && sym
->result
->ts
.u
.cl
3162 && sym
->result
->ts
.u
.cl
->length
== NULL
3163 && !sym
->result
->ts
.deferred
)
3165 gfc_error ("ABSTRACT INTERFACE %qs at %L must not have an assumed "
3166 "character length result (F2008: C418)", sym
->name
,
3171 /* Switch off assumed size checking and do this again for certain kinds
3172 of procedure, once the procedure itself is resolved. */
3173 need_full_assumed_size
++;
3175 if (expr
->symtree
&& expr
->symtree
->n
.sym
)
3176 p
= expr
->symtree
->n
.sym
->attr
.proc
;
3178 if (expr
->value
.function
.isym
&& expr
->value
.function
.isym
->inquiry
)
3179 inquiry_argument
= true;
3180 no_formal_args
= sym
&& is_external_proc (sym
)
3181 && gfc_sym_get_dummy_args (sym
) == NULL
;
3183 if (!resolve_actual_arglist (expr
->value
.function
.actual
,
3186 inquiry_argument
= false;
3190 inquiry_argument
= false;
3192 /* Resume assumed_size checking. */
3193 need_full_assumed_size
--;
3195 /* If the procedure is external, check for usage. */
3196 if (sym
&& is_external_proc (sym
))
3197 resolve_global_procedure (sym
, &expr
->where
, 0);
3199 if (sym
&& sym
->ts
.type
== BT_CHARACTER
3201 && sym
->ts
.u
.cl
->length
== NULL
3203 && !sym
->ts
.deferred
3204 && expr
->value
.function
.esym
== NULL
3205 && !sym
->attr
.contained
)
3207 /* Internal procedures are taken care of in resolve_contained_fntype. */
3208 gfc_error ("Function %qs is declared CHARACTER(*) and cannot "
3209 "be used at %L since it is not a dummy argument",
3210 sym
->name
, &expr
->where
);
3214 /* See if function is already resolved. */
3216 if (expr
->value
.function
.name
!= NULL
3217 || expr
->value
.function
.isym
!= NULL
)
3219 if (expr
->ts
.type
== BT_UNKNOWN
)
3225 /* Apply the rules of section 14.1.2. */
3227 switch (procedure_kind (sym
))
3230 t
= resolve_generic_f (expr
);
3233 case PTYPE_SPECIFIC
:
3234 t
= resolve_specific_f (expr
);
3238 t
= resolve_unknown_f (expr
);
3242 gfc_internal_error ("resolve_function(): bad function type");
3246 /* If the expression is still a function (it might have simplified),
3247 then we check to see if we are calling an elemental function. */
3249 if (expr
->expr_type
!= EXPR_FUNCTION
)
3252 /* Walk the argument list looking for invalid BOZ. */
3253 for (arg
= expr
->value
.function
.actual
; arg
; arg
= arg
->next
)
3254 if (arg
->expr
&& arg
->expr
->ts
.type
== BT_BOZ
)
3256 gfc_error ("A BOZ literal constant at %L cannot appear as an "
3257 "actual argument in a function reference",
3262 temp
= need_full_assumed_size
;
3263 need_full_assumed_size
= 0;
3265 if (!resolve_elemental_actual (expr
, NULL
))
3268 if (omp_workshare_flag
3269 && expr
->value
.function
.esym
3270 && ! gfc_elemental (expr
->value
.function
.esym
))
3272 gfc_error ("User defined non-ELEMENTAL function %qs at %L not allowed "
3273 "in WORKSHARE construct", expr
->value
.function
.esym
->name
,
3278 #define GENERIC_ID expr->value.function.isym->id
3279 else if (expr
->value
.function
.actual
!= NULL
3280 && expr
->value
.function
.isym
!= NULL
3281 && GENERIC_ID
!= GFC_ISYM_LBOUND
3282 && GENERIC_ID
!= GFC_ISYM_LCOBOUND
3283 && GENERIC_ID
!= GFC_ISYM_UCOBOUND
3284 && GENERIC_ID
!= GFC_ISYM_LEN
3285 && GENERIC_ID
!= GFC_ISYM_LOC
3286 && GENERIC_ID
!= GFC_ISYM_C_LOC
3287 && GENERIC_ID
!= GFC_ISYM_PRESENT
)
3289 /* Array intrinsics must also have the last upper bound of an
3290 assumed size array argument. UBOUND and SIZE have to be
3291 excluded from the check if the second argument is anything
3294 for (arg
= expr
->value
.function
.actual
; arg
; arg
= arg
->next
)
3296 if ((GENERIC_ID
== GFC_ISYM_UBOUND
|| GENERIC_ID
== GFC_ISYM_SIZE
)
3297 && arg
== expr
->value
.function
.actual
3298 && arg
->next
!= NULL
&& arg
->next
->expr
)
3300 if (arg
->next
->expr
->expr_type
!= EXPR_CONSTANT
)
3303 if (arg
->next
->name
&& strcmp (arg
->next
->name
, "kind") == 0)
3306 if ((int)mpz_get_si (arg
->next
->expr
->value
.integer
)
3311 if (arg
->expr
!= NULL
3312 && arg
->expr
->rank
> 0
3313 && resolve_assumed_size_actual (arg
->expr
))
3319 need_full_assumed_size
= temp
;
3321 if (!check_pure_function(expr
))
3324 /* Functions without the RECURSIVE attribution are not allowed to
3325 * call themselves. */
3326 if (expr
->value
.function
.esym
&& !expr
->value
.function
.esym
->attr
.recursive
)
3329 esym
= expr
->value
.function
.esym
;
3331 if (is_illegal_recursion (esym
, gfc_current_ns
))
3333 if (esym
->attr
.entry
&& esym
->ns
->entries
)
3334 gfc_error ("ENTRY %qs at %L cannot be called recursively, as"
3335 " function %qs is not RECURSIVE",
3336 esym
->name
, &expr
->where
, esym
->ns
->entries
->sym
->name
);
3338 gfc_error ("Function %qs at %L cannot be called recursively, as it"
3339 " is not RECURSIVE", esym
->name
, &expr
->where
);
3345 /* Character lengths of use associated functions may contains references to
3346 symbols not referenced from the current program unit otherwise. Make sure
3347 those symbols are marked as referenced. */
3349 if (expr
->ts
.type
== BT_CHARACTER
&& expr
->value
.function
.esym
3350 && expr
->value
.function
.esym
->attr
.use_assoc
)
3352 gfc_expr_set_symbols_referenced (expr
->ts
.u
.cl
->length
);
3355 /* Make sure that the expression has a typespec that works. */
3356 if (expr
->ts
.type
== BT_UNKNOWN
)
3358 if (expr
->symtree
->n
.sym
->result
3359 && expr
->symtree
->n
.sym
->result
->ts
.type
!= BT_UNKNOWN
3360 && !expr
->symtree
->n
.sym
->result
->attr
.proc_pointer
)
3361 expr
->ts
= expr
->symtree
->n
.sym
->result
->ts
;
3364 if (!expr
->ref
&& !expr
->value
.function
.isym
)
3366 if (expr
->value
.function
.esym
)
3367 update_current_proc_array_outer_dependency (expr
->value
.function
.esym
);
3369 update_current_proc_array_outer_dependency (sym
);
3372 /* typebound procedure: Assume the worst. */
3373 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3379 /************* Subroutine resolution *************/
3382 pure_subroutine (gfc_symbol
*sym
, const char *name
, locus
*loc
)
3389 gfc_error ("Subroutine call to %qs in FORALL block at %L is not PURE",
3393 else if (gfc_do_concurrent_flag
)
3395 gfc_error ("Subroutine call to %qs in DO CONCURRENT block at %L is not "
3399 else if (gfc_pure (NULL
))
3401 gfc_error ("Subroutine call to %qs at %L is not PURE", name
, loc
);
3405 gfc_unset_implicit_pure (NULL
);
3411 resolve_generic_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3415 if (sym
->attr
.generic
)
3417 s
= gfc_search_interface (sym
->generic
, 1, &c
->ext
.actual
);
3420 c
->resolved_sym
= s
;
3421 if (!pure_subroutine (s
, s
->name
, &c
->loc
))
3426 /* TODO: Need to search for elemental references in generic interface. */
3429 if (sym
->attr
.intrinsic
)
3430 return gfc_intrinsic_sub_interface (c
, 0);
3437 resolve_generic_s (gfc_code
*c
)
3442 sym
= c
->symtree
->n
.sym
;
3446 m
= resolve_generic_s0 (c
, sym
);
3449 else if (m
== MATCH_ERROR
)
3453 if (sym
->ns
->parent
== NULL
)
3455 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3459 if (!generic_sym (sym
))
3463 /* Last ditch attempt. See if the reference is to an intrinsic
3464 that possesses a matching interface. 14.1.2.4 */
3465 sym
= c
->symtree
->n
.sym
;
3467 if (!gfc_is_intrinsic (sym
, 1, c
->loc
))
3469 gfc_error ("There is no specific subroutine for the generic %qs at %L",
3470 sym
->name
, &c
->loc
);
3474 m
= gfc_intrinsic_sub_interface (c
, 0);
3478 gfc_error ("Generic subroutine %qs at %L is not consistent with an "
3479 "intrinsic subroutine interface", sym
->name
, &c
->loc
);
3485 /* Resolve a subroutine call known to be specific. */
3488 resolve_specific_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3492 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
3494 if (sym
->attr
.dummy
)
3496 sym
->attr
.proc
= PROC_DUMMY
;
3500 sym
->attr
.proc
= PROC_EXTERNAL
;
3504 if (sym
->attr
.proc
== PROC_MODULE
|| sym
->attr
.proc
== PROC_INTERNAL
)
3507 if (sym
->attr
.intrinsic
)
3509 m
= gfc_intrinsic_sub_interface (c
, 1);
3513 gfc_error ("Subroutine %qs at %L is INTRINSIC but is not compatible "
3514 "with an intrinsic", sym
->name
, &c
->loc
);
3522 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3524 c
->resolved_sym
= sym
;
3525 if (!pure_subroutine (sym
, sym
->name
, &c
->loc
))
3533 resolve_specific_s (gfc_code
*c
)
3538 sym
= c
->symtree
->n
.sym
;
3542 m
= resolve_specific_s0 (c
, sym
);
3545 if (m
== MATCH_ERROR
)
3548 if (sym
->ns
->parent
== NULL
)
3551 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3557 sym
= c
->symtree
->n
.sym
;
3558 gfc_error ("Unable to resolve the specific subroutine %qs at %L",
3559 sym
->name
, &c
->loc
);
3565 /* Resolve a subroutine call not known to be generic nor specific. */
3568 resolve_unknown_s (gfc_code
*c
)
3572 sym
= c
->symtree
->n
.sym
;
3574 if (sym
->attr
.dummy
)
3576 sym
->attr
.proc
= PROC_DUMMY
;
3580 /* See if we have an intrinsic function reference. */
3582 if (gfc_is_intrinsic (sym
, 1, c
->loc
))
3584 if (gfc_intrinsic_sub_interface (c
, 1) == MATCH_YES
)
3589 /* The reference is to an external name. */
3592 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3594 c
->resolved_sym
= sym
;
3596 return pure_subroutine (sym
, sym
->name
, &c
->loc
);
3600 /* Resolve a subroutine call. Although it was tempting to use the same code
3601 for functions, subroutines and functions are stored differently and this
3602 makes things awkward. */
3605 resolve_call (gfc_code
*c
)
3608 procedure_type ptype
= PROC_INTRINSIC
;
3609 gfc_symbol
*csym
, *sym
;
3610 bool no_formal_args
;
3612 csym
= c
->symtree
? c
->symtree
->n
.sym
: NULL
;
3614 if (csym
&& csym
->ts
.type
!= BT_UNKNOWN
)
3616 gfc_error ("%qs at %L has a type, which is not consistent with "
3617 "the CALL at %L", csym
->name
, &csym
->declared_at
, &c
->loc
);
3621 if (csym
&& gfc_current_ns
->parent
&& csym
->ns
!= gfc_current_ns
)
3624 gfc_find_sym_tree (c
->symtree
->name
, gfc_current_ns
, 1, &st
);
3625 sym
= st
? st
->n
.sym
: NULL
;
3626 if (sym
&& csym
!= sym
3627 && sym
->ns
== gfc_current_ns
3628 && sym
->attr
.flavor
== FL_PROCEDURE
3629 && sym
->attr
.contained
)
3632 if (csym
->attr
.generic
)
3633 c
->symtree
->n
.sym
= sym
;
3636 csym
= c
->symtree
->n
.sym
;
3640 /* If this ia a deferred TBP, c->expr1 will be set. */
3641 if (!c
->expr1
&& csym
)
3643 if (csym
->attr
.abstract
)
3645 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3646 csym
->name
, &c
->loc
);
3650 /* Subroutines without the RECURSIVE attribution are not allowed to
3652 if (is_illegal_recursion (csym
, gfc_current_ns
))
3654 if (csym
->attr
.entry
&& csym
->ns
->entries
)
3655 gfc_error ("ENTRY %qs at %L cannot be called recursively, "
3656 "as subroutine %qs is not RECURSIVE",
3657 csym
->name
, &c
->loc
, csym
->ns
->entries
->sym
->name
);
3659 gfc_error ("SUBROUTINE %qs at %L cannot be called recursively, "
3660 "as it is not RECURSIVE", csym
->name
, &c
->loc
);
3666 /* Switch off assumed size checking and do this again for certain kinds
3667 of procedure, once the procedure itself is resolved. */
3668 need_full_assumed_size
++;
3671 ptype
= csym
->attr
.proc
;
3673 no_formal_args
= csym
&& is_external_proc (csym
)
3674 && gfc_sym_get_dummy_args (csym
) == NULL
;
3675 if (!resolve_actual_arglist (c
->ext
.actual
, ptype
, no_formal_args
))
3678 /* Resume assumed_size checking. */
3679 need_full_assumed_size
--;
3681 /* If external, check for usage. */
3682 if (csym
&& is_external_proc (csym
))
3683 resolve_global_procedure (csym
, &c
->loc
, 1);
3686 if (c
->resolved_sym
== NULL
)
3688 c
->resolved_isym
= NULL
;
3689 switch (procedure_kind (csym
))
3692 t
= resolve_generic_s (c
);
3695 case PTYPE_SPECIFIC
:
3696 t
= resolve_specific_s (c
);
3700 t
= resolve_unknown_s (c
);
3704 gfc_internal_error ("resolve_subroutine(): bad function type");
3708 /* Some checks of elemental subroutine actual arguments. */
3709 if (!resolve_elemental_actual (NULL
, c
))
3713 update_current_proc_array_outer_dependency (csym
);
3715 /* Typebound procedure: Assume the worst. */
3716 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3722 /* Compare the shapes of two arrays that have non-NULL shapes. If both
3723 op1->shape and op2->shape are non-NULL return true if their shapes
3724 match. If both op1->shape and op2->shape are non-NULL return false
3725 if their shapes do not match. If either op1->shape or op2->shape is
3726 NULL, return true. */
3729 compare_shapes (gfc_expr
*op1
, gfc_expr
*op2
)
3736 if (op1
->shape
!= NULL
&& op2
->shape
!= NULL
)
3738 for (i
= 0; i
< op1
->rank
; i
++)
3740 if (mpz_cmp (op1
->shape
[i
], op2
->shape
[i
]) != 0)
3742 gfc_error ("Shapes for operands at %L and %L are not conformable",
3743 &op1
->where
, &op2
->where
);
3753 /* Convert a logical operator to the corresponding bitwise intrinsic call.
3754 For example A .AND. B becomes IAND(A, B). */
3756 logical_to_bitwise (gfc_expr
*e
)
3758 gfc_expr
*tmp
, *op1
, *op2
;
3760 gfc_actual_arglist
*args
= NULL
;
3762 gcc_assert (e
->expr_type
== EXPR_OP
);
3764 isym
= GFC_ISYM_NONE
;
3765 op1
= e
->value
.op
.op1
;
3766 op2
= e
->value
.op
.op2
;
3768 switch (e
->value
.op
.op
)
3771 isym
= GFC_ISYM_NOT
;
3774 isym
= GFC_ISYM_IAND
;
3777 isym
= GFC_ISYM_IOR
;
3779 case INTRINSIC_NEQV
:
3780 isym
= GFC_ISYM_IEOR
;
3783 /* "Bitwise eqv" is just the complement of NEQV === IEOR.
3784 Change the old expression to NEQV, which will get replaced by IEOR,
3785 and wrap it in NOT. */
3786 tmp
= gfc_copy_expr (e
);
3787 tmp
->value
.op
.op
= INTRINSIC_NEQV
;
3788 tmp
= logical_to_bitwise (tmp
);
3789 isym
= GFC_ISYM_NOT
;
3794 gfc_internal_error ("logical_to_bitwise(): Bad intrinsic");
3797 /* Inherit the original operation's operands as arguments. */
3798 args
= gfc_get_actual_arglist ();
3802 args
->next
= gfc_get_actual_arglist ();
3803 args
->next
->expr
= op2
;
3806 /* Convert the expression to a function call. */
3807 e
->expr_type
= EXPR_FUNCTION
;
3808 e
->value
.function
.actual
= args
;
3809 e
->value
.function
.isym
= gfc_intrinsic_function_by_id (isym
);
3810 e
->value
.function
.name
= e
->value
.function
.isym
->name
;
3811 e
->value
.function
.esym
= NULL
;
3813 /* Make up a pre-resolved function call symtree if we need to. */
3814 if (!e
->symtree
|| !e
->symtree
->n
.sym
)
3817 gfc_get_ha_sym_tree (e
->value
.function
.isym
->name
, &e
->symtree
);
3818 sym
= e
->symtree
->n
.sym
;
3820 sym
->attr
.flavor
= FL_PROCEDURE
;
3821 sym
->attr
.function
= 1;
3822 sym
->attr
.elemental
= 1;
3824 sym
->attr
.referenced
= 1;
3825 gfc_intrinsic_symbol (sym
);
3826 gfc_commit_symbol (sym
);
3829 args
->name
= e
->value
.function
.isym
->formal
->name
;
3830 if (e
->value
.function
.isym
->formal
->next
)
3831 args
->next
->name
= e
->value
.function
.isym
->formal
->next
->name
;
3836 /* Recursively append candidate UOP to CANDIDATES. Store the number of
3837 candidates in CANDIDATES_LEN. */
3839 lookup_uop_fuzzy_find_candidates (gfc_symtree
*uop
,
3841 size_t &candidates_len
)
3848 /* Not sure how to properly filter here. Use all for a start.
3849 n.uop.op is NULL for empty interface operators (is that legal?) disregard
3850 these as i suppose they don't make terribly sense. */
3852 if (uop
->n
.uop
->op
!= NULL
)
3853 vec_push (candidates
, candidates_len
, uop
->name
);
3857 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3861 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3864 /* Lookup user-operator OP fuzzily, taking names in UOP into account. */
3867 lookup_uop_fuzzy (const char *op
, gfc_symtree
*uop
)
3869 char **candidates
= NULL
;
3870 size_t candidates_len
= 0;
3871 lookup_uop_fuzzy_find_candidates (uop
, candidates
, candidates_len
);
3872 return gfc_closest_fuzzy_match (op
, candidates
);
3876 /* Callback finding an impure function as an operand to an .and. or
3877 .or. expression. Remember the last function warned about to
3878 avoid double warnings when recursing. */
3881 impure_function_callback (gfc_expr
**e
, int *walk_subtrees ATTRIBUTE_UNUSED
,
3886 static gfc_expr
*last
= NULL
;
3887 bool *found
= (bool *) data
;
3889 if (f
->expr_type
== EXPR_FUNCTION
)
3892 if (f
!= last
&& !gfc_pure_function (f
, &name
)
3893 && !gfc_implicit_pure_function (f
))
3896 gfc_warning (OPT_Wfunction_elimination
,
3897 "Impure function %qs at %L might not be evaluated",
3900 gfc_warning (OPT_Wfunction_elimination
,
3901 "Impure function at %L might not be evaluated",
3910 /* Return true if TYPE is character based, false otherwise. */
3913 is_character_based (bt type
)
3915 return type
== BT_CHARACTER
|| type
== BT_HOLLERITH
;
3919 /* If expression is a hollerith, convert it to character and issue a warning
3920 for the conversion. */
3923 convert_hollerith_to_character (gfc_expr
*e
)
3925 if (e
->ts
.type
== BT_HOLLERITH
)
3929 t
.type
= BT_CHARACTER
;
3930 t
.kind
= e
->ts
.kind
;
3931 gfc_convert_type_warn (e
, &t
, 2, 1);
3935 /* Convert to numeric and issue a warning for the conversion. */
3938 convert_to_numeric (gfc_expr
*a
, gfc_expr
*b
)
3942 t
.type
= b
->ts
.type
;
3943 t
.kind
= b
->ts
.kind
;
3944 gfc_convert_type_warn (a
, &t
, 2, 1);
3947 /* Resolve an operator expression node. This can involve replacing the
3948 operation with a user defined function call. */
3951 resolve_operator (gfc_expr
*e
)
3953 gfc_expr
*op1
, *op2
;
3955 bool dual_locus_error
;
3958 /* Resolve all subnodes-- give them types. */
3960 switch (e
->value
.op
.op
)
3963 if (!gfc_resolve_expr (e
->value
.op
.op2
))
3969 case INTRINSIC_UPLUS
:
3970 case INTRINSIC_UMINUS
:
3971 case INTRINSIC_PARENTHESES
:
3972 if (!gfc_resolve_expr (e
->value
.op
.op1
))
3975 && e
->value
.op
.op1
->ts
.type
== BT_BOZ
&& !e
->value
.op
.op2
)
3977 gfc_error ("BOZ literal constant at %L cannot be an operand of "
3978 "unary operator %qs", &e
->value
.op
.op1
->where
,
3979 gfc_op2string (e
->value
.op
.op
));
3985 /* Typecheck the new node. */
3987 op1
= e
->value
.op
.op1
;
3988 op2
= e
->value
.op
.op2
;
3989 dual_locus_error
= false;
3991 /* op1 and op2 cannot both be BOZ. */
3992 if (op1
&& op1
->ts
.type
== BT_BOZ
3993 && op2
&& op2
->ts
.type
== BT_BOZ
)
3995 gfc_error ("Operands at %L and %L cannot appear as operands of "
3996 "binary operator %qs", &op1
->where
, &op2
->where
,
3997 gfc_op2string (e
->value
.op
.op
));
4001 if ((op1
&& op1
->expr_type
== EXPR_NULL
)
4002 || (op2
&& op2
->expr_type
== EXPR_NULL
))
4004 sprintf (msg
, _("Invalid context for NULL() pointer at %%L"));
4008 switch (e
->value
.op
.op
)
4010 case INTRINSIC_UPLUS
:
4011 case INTRINSIC_UMINUS
:
4012 if (op1
->ts
.type
== BT_INTEGER
4013 || op1
->ts
.type
== BT_REAL
4014 || op1
->ts
.type
== BT_COMPLEX
)
4020 sprintf (msg
, _("Operand of unary numeric operator %%<%s%%> at %%L is %s"),
4021 gfc_op2string (e
->value
.op
.op
), gfc_typename (e
));
4024 case INTRINSIC_PLUS
:
4025 case INTRINSIC_MINUS
:
4026 case INTRINSIC_TIMES
:
4027 case INTRINSIC_DIVIDE
:
4028 case INTRINSIC_POWER
:
4029 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
4031 gfc_type_convert_binary (e
, 1);
4035 if (op1
->ts
.type
== BT_DERIVED
|| op2
->ts
.type
== BT_DERIVED
)
4037 _("Unexpected derived-type entities in binary intrinsic "
4038 "numeric operator %%<%s%%> at %%L"),
4039 gfc_op2string (e
->value
.op
.op
));
4042 _("Operands of binary numeric operator %%<%s%%> at %%L are %s/%s"),
4043 gfc_op2string (e
->value
.op
.op
), gfc_typename (op1
),
4044 gfc_typename (op2
));
4047 case INTRINSIC_CONCAT
:
4048 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
4049 && op1
->ts
.kind
== op2
->ts
.kind
)
4051 e
->ts
.type
= BT_CHARACTER
;
4052 e
->ts
.kind
= op1
->ts
.kind
;
4057 _("Operands of string concatenation operator at %%L are %s/%s"),
4058 gfc_typename (op1
), gfc_typename (op2
));
4064 case INTRINSIC_NEQV
:
4065 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
4067 e
->ts
.type
= BT_LOGICAL
;
4068 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
4069 if (op1
->ts
.kind
< e
->ts
.kind
)
4070 gfc_convert_type (op1
, &e
->ts
, 2);
4071 else if (op2
->ts
.kind
< e
->ts
.kind
)
4072 gfc_convert_type (op2
, &e
->ts
, 2);
4074 if (flag_frontend_optimize
&&
4075 (e
->value
.op
.op
== INTRINSIC_AND
|| e
->value
.op
.op
== INTRINSIC_OR
))
4077 /* Warn about short-circuiting
4078 with impure function as second operand. */
4080 gfc_expr_walker (&op2
, impure_function_callback
, &op2_f
);
4085 /* Logical ops on integers become bitwise ops with -fdec. */
4087 && (op1
->ts
.type
== BT_INTEGER
|| op2
->ts
.type
== BT_INTEGER
))
4089 e
->ts
.type
= BT_INTEGER
;
4090 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
4091 if (op1
->ts
.type
!= e
->ts
.type
|| op1
->ts
.kind
!= e
->ts
.kind
)
4092 gfc_convert_type (op1
, &e
->ts
, 1);
4093 if (op2
->ts
.type
!= e
->ts
.type
|| op2
->ts
.kind
!= e
->ts
.kind
)
4094 gfc_convert_type (op2
, &e
->ts
, 1);
4095 e
= logical_to_bitwise (e
);
4099 sprintf (msg
, _("Operands of logical operator %%<%s%%> at %%L are %s/%s"),
4100 gfc_op2string (e
->value
.op
.op
), gfc_typename (op1
),
4101 gfc_typename (op2
));
4106 /* Logical ops on integers become bitwise ops with -fdec. */
4107 if (flag_dec
&& op1
->ts
.type
== BT_INTEGER
)
4109 e
->ts
.type
= BT_INTEGER
;
4110 e
->ts
.kind
= op1
->ts
.kind
;
4111 e
= logical_to_bitwise (e
);
4115 if (op1
->ts
.type
== BT_LOGICAL
)
4117 e
->ts
.type
= BT_LOGICAL
;
4118 e
->ts
.kind
= op1
->ts
.kind
;
4122 sprintf (msg
, _("Operand of .not. operator at %%L is %s"),
4123 gfc_typename (op1
));
4127 case INTRINSIC_GT_OS
:
4129 case INTRINSIC_GE_OS
:
4131 case INTRINSIC_LT_OS
:
4133 case INTRINSIC_LE_OS
:
4134 if (op1
->ts
.type
== BT_COMPLEX
|| op2
->ts
.type
== BT_COMPLEX
)
4136 strcpy (msg
, _("COMPLEX quantities cannot be compared at %L"));
4143 case INTRINSIC_EQ_OS
:
4145 case INTRINSIC_NE_OS
:
4148 && is_character_based (op1
->ts
.type
)
4149 && is_character_based (op2
->ts
.type
))
4151 convert_hollerith_to_character (op1
);
4152 convert_hollerith_to_character (op2
);
4155 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
4156 && op1
->ts
.kind
== op2
->ts
.kind
)
4158 e
->ts
.type
= BT_LOGICAL
;
4159 e
->ts
.kind
= gfc_default_logical_kind
;
4163 /* If op1 is BOZ, then op2 is not!. Try to convert to type of op2. */
4164 if (op1
->ts
.type
== BT_BOZ
)
4166 if (gfc_invalid_boz ("BOZ literal constant near %L cannot appear as "
4167 "an operand of a relational operator",
4171 if (op2
->ts
.type
== BT_INTEGER
&& !gfc_boz2int (op1
, op2
->ts
.kind
))
4174 if (op2
->ts
.type
== BT_REAL
&& !gfc_boz2real (op1
, op2
->ts
.kind
))
4178 /* If op2 is BOZ, then op1 is not!. Try to convert to type of op2. */
4179 if (op2
->ts
.type
== BT_BOZ
)
4181 if (gfc_invalid_boz ("BOZ literal constant near %L cannot appear as "
4182 "an operand of a relational operator",
4186 if (op1
->ts
.type
== BT_INTEGER
&& !gfc_boz2int (op2
, op1
->ts
.kind
))
4189 if (op1
->ts
.type
== BT_REAL
&& !gfc_boz2real (op2
, op1
->ts
.kind
))
4193 && op1
->ts
.type
== BT_HOLLERITH
&& gfc_numeric_ts (&op2
->ts
))
4194 convert_to_numeric (op1
, op2
);
4197 && gfc_numeric_ts (&op1
->ts
) && op2
->ts
.type
== BT_HOLLERITH
)
4198 convert_to_numeric (op2
, op1
);
4200 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
4202 gfc_type_convert_binary (e
, 1);
4204 e
->ts
.type
= BT_LOGICAL
;
4205 e
->ts
.kind
= gfc_default_logical_kind
;
4207 if (warn_compare_reals
)
4209 gfc_intrinsic_op op
= e
->value
.op
.op
;
4211 /* Type conversion has made sure that the types of op1 and op2
4212 agree, so it is only necessary to check the first one. */
4213 if ((op1
->ts
.type
== BT_REAL
|| op1
->ts
.type
== BT_COMPLEX
)
4214 && (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
4215 || op
== INTRINSIC_NE
|| op
== INTRINSIC_NE_OS
))
4219 if (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
)
4220 msg
= "Equality comparison for %s at %L";
4222 msg
= "Inequality comparison for %s at %L";
4224 gfc_warning (OPT_Wcompare_reals
, msg
,
4225 gfc_typename (op1
), &op1
->where
);
4232 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
4234 _("Logicals at %%L must be compared with %s instead of %s"),
4235 (e
->value
.op
.op
== INTRINSIC_EQ
4236 || e
->value
.op
.op
== INTRINSIC_EQ_OS
)
4237 ? ".eqv." : ".neqv.", gfc_op2string (e
->value
.op
.op
));
4240 _("Operands of comparison operator %%<%s%%> at %%L are %s/%s"),
4241 gfc_op2string (e
->value
.op
.op
), gfc_typename (op1
),
4242 gfc_typename (op2
));
4246 case INTRINSIC_USER
:
4247 if (e
->value
.op
.uop
->op
== NULL
)
4249 const char *name
= e
->value
.op
.uop
->name
;
4250 const char *guessed
;
4251 guessed
= lookup_uop_fuzzy (name
, e
->value
.op
.uop
->ns
->uop_root
);
4253 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L; did you mean '%s'?"),
4256 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L"), name
);
4258 else if (op2
== NULL
)
4259 sprintf (msg
, _("Operand of user operator %%<%s%%> at %%L is %s"),
4260 e
->value
.op
.uop
->name
, gfc_typename (op1
));
4263 sprintf (msg
, _("Operands of user operator %%<%s%%> at %%L are %s/%s"),
4264 e
->value
.op
.uop
->name
, gfc_typename (op1
),
4265 gfc_typename (op2
));
4266 e
->value
.op
.uop
->op
->sym
->attr
.referenced
= 1;
4271 case INTRINSIC_PARENTHESES
:
4273 if (e
->ts
.type
== BT_CHARACTER
)
4274 e
->ts
.u
.cl
= op1
->ts
.u
.cl
;
4278 gfc_internal_error ("resolve_operator(): Bad intrinsic");
4281 /* Deal with arrayness of an operand through an operator. */
4283 switch (e
->value
.op
.op
)
4285 case INTRINSIC_PLUS
:
4286 case INTRINSIC_MINUS
:
4287 case INTRINSIC_TIMES
:
4288 case INTRINSIC_DIVIDE
:
4289 case INTRINSIC_POWER
:
4290 case INTRINSIC_CONCAT
:
4294 case INTRINSIC_NEQV
:
4296 case INTRINSIC_EQ_OS
:
4298 case INTRINSIC_NE_OS
:
4300 case INTRINSIC_GT_OS
:
4302 case INTRINSIC_GE_OS
:
4304 case INTRINSIC_LT_OS
:
4306 case INTRINSIC_LE_OS
:
4308 if (op1
->rank
== 0 && op2
->rank
== 0)
4311 if (op1
->rank
== 0 && op2
->rank
!= 0)
4313 e
->rank
= op2
->rank
;
4315 if (e
->shape
== NULL
)
4316 e
->shape
= gfc_copy_shape (op2
->shape
, op2
->rank
);
4319 if (op1
->rank
!= 0 && op2
->rank
== 0)
4321 e
->rank
= op1
->rank
;
4323 if (e
->shape
== NULL
)
4324 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4327 if (op1
->rank
!= 0 && op2
->rank
!= 0)
4329 if (op1
->rank
== op2
->rank
)
4331 e
->rank
= op1
->rank
;
4332 if (e
->shape
== NULL
)
4334 t
= compare_shapes (op1
, op2
);
4338 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4343 /* Allow higher level expressions to work. */
4346 /* Try user-defined operators, and otherwise throw an error. */
4347 dual_locus_error
= true;
4349 _("Inconsistent ranks for operator at %%L and %%L"));
4356 case INTRINSIC_PARENTHESES
:
4358 case INTRINSIC_UPLUS
:
4359 case INTRINSIC_UMINUS
:
4360 /* Simply copy arrayness attribute */
4361 e
->rank
= op1
->rank
;
4363 if (e
->shape
== NULL
)
4364 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4374 /* Attempt to simplify the expression. */
4377 t
= gfc_simplify_expr (e
, 0);
4378 /* Some calls do not succeed in simplification and return false
4379 even though there is no error; e.g. variable references to
4380 PARAMETER arrays. */
4381 if (!gfc_is_constant_expr (e
))
4389 match m
= gfc_extend_expr (e
);
4392 if (m
== MATCH_ERROR
)
4396 if (dual_locus_error
)
4397 gfc_error (msg
, &op1
->where
, &op2
->where
);
4399 gfc_error (msg
, &e
->where
);
4405 /************** Array resolution subroutines **************/
4408 { CMP_LT
, CMP_EQ
, CMP_GT
, CMP_UNKNOWN
};
4410 /* Compare two integer expressions. */
4412 static compare_result
4413 compare_bound (gfc_expr
*a
, gfc_expr
*b
)
4417 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
4418 || b
== NULL
|| b
->expr_type
!= EXPR_CONSTANT
)
4421 /* If either of the types isn't INTEGER, we must have
4422 raised an error earlier. */
4424 if (a
->ts
.type
!= BT_INTEGER
|| b
->ts
.type
!= BT_INTEGER
)
4427 i
= mpz_cmp (a
->value
.integer
, b
->value
.integer
);
4437 /* Compare an integer expression with an integer. */
4439 static compare_result
4440 compare_bound_int (gfc_expr
*a
, int b
)
4444 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4447 if (a
->ts
.type
!= BT_INTEGER
)
4448 gfc_internal_error ("compare_bound_int(): Bad expression");
4450 i
= mpz_cmp_si (a
->value
.integer
, b
);
4460 /* Compare an integer expression with a mpz_t. */
4462 static compare_result
4463 compare_bound_mpz_t (gfc_expr
*a
, mpz_t b
)
4467 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4470 if (a
->ts
.type
!= BT_INTEGER
)
4471 gfc_internal_error ("compare_bound_int(): Bad expression");
4473 i
= mpz_cmp (a
->value
.integer
, b
);
4483 /* Compute the last value of a sequence given by a triplet.
4484 Return 0 if it wasn't able to compute the last value, or if the
4485 sequence if empty, and 1 otherwise. */
4488 compute_last_value_for_triplet (gfc_expr
*start
, gfc_expr
*end
,
4489 gfc_expr
*stride
, mpz_t last
)
4493 if (start
== NULL
|| start
->expr_type
!= EXPR_CONSTANT
4494 || end
== NULL
|| end
->expr_type
!= EXPR_CONSTANT
4495 || (stride
!= NULL
&& stride
->expr_type
!= EXPR_CONSTANT
))
4498 if (start
->ts
.type
!= BT_INTEGER
|| end
->ts
.type
!= BT_INTEGER
4499 || (stride
!= NULL
&& stride
->ts
.type
!= BT_INTEGER
))
4502 if (stride
== NULL
|| compare_bound_int (stride
, 1) == CMP_EQ
)
4504 if (compare_bound (start
, end
) == CMP_GT
)
4506 mpz_set (last
, end
->value
.integer
);
4510 if (compare_bound_int (stride
, 0) == CMP_GT
)
4512 /* Stride is positive */
4513 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) > 0)
4518 /* Stride is negative */
4519 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) < 0)
4524 mpz_sub (rem
, end
->value
.integer
, start
->value
.integer
);
4525 mpz_tdiv_r (rem
, rem
, stride
->value
.integer
);
4526 mpz_sub (last
, end
->value
.integer
, rem
);
4533 /* Compare a single dimension of an array reference to the array
4537 check_dimension (int i
, gfc_array_ref
*ar
, gfc_array_spec
*as
)
4541 if (ar
->dimen_type
[i
] == DIMEN_STAR
)
4543 gcc_assert (ar
->stride
[i
] == NULL
);
4544 /* This implies [*] as [*:] and [*:3] are not possible. */
4545 if (ar
->start
[i
] == NULL
)
4547 gcc_assert (ar
->end
[i
] == NULL
);
4552 /* Given start, end and stride values, calculate the minimum and
4553 maximum referenced indexes. */
4555 switch (ar
->dimen_type
[i
])
4558 case DIMEN_THIS_IMAGE
:
4563 if (compare_bound (ar
->start
[i
], as
->lower
[i
]) == CMP_LT
)
4566 gfc_warning (0, "Array reference at %L is out of bounds "
4567 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4568 mpz_get_si (ar
->start
[i
]->value
.integer
),
4569 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4571 gfc_warning (0, "Array reference at %L is out of bounds "
4572 "(%ld < %ld) in codimension %d", &ar
->c_where
[i
],
4573 mpz_get_si (ar
->start
[i
]->value
.integer
),
4574 mpz_get_si (as
->lower
[i
]->value
.integer
),
4578 if (compare_bound (ar
->start
[i
], as
->upper
[i
]) == CMP_GT
)
4581 gfc_warning (0, "Array reference at %L is out of bounds "
4582 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4583 mpz_get_si (ar
->start
[i
]->value
.integer
),
4584 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4586 gfc_warning (0, "Array reference at %L is out of bounds "
4587 "(%ld > %ld) in codimension %d", &ar
->c_where
[i
],
4588 mpz_get_si (ar
->start
[i
]->value
.integer
),
4589 mpz_get_si (as
->upper
[i
]->value
.integer
),
4598 #define AR_START (ar->start[i] ? ar->start[i] : as->lower[i])
4599 #define AR_END (ar->end[i] ? ar->end[i] : as->upper[i])
4601 compare_result comp_start_end
= compare_bound (AR_START
, AR_END
);
4603 /* Check for zero stride, which is not allowed. */
4604 if (compare_bound_int (ar
->stride
[i
], 0) == CMP_EQ
)
4606 gfc_error ("Illegal stride of zero at %L", &ar
->c_where
[i
]);
4610 /* if start == len || (stride > 0 && start < len)
4611 || (stride < 0 && start > len),
4612 then the array section contains at least one element. In this
4613 case, there is an out-of-bounds access if
4614 (start < lower || start > upper). */
4615 if (compare_bound (AR_START
, AR_END
) == CMP_EQ
4616 || ((compare_bound_int (ar
->stride
[i
], 0) == CMP_GT
4617 || ar
->stride
[i
] == NULL
) && comp_start_end
== CMP_LT
)
4618 || (compare_bound_int (ar
->stride
[i
], 0) == CMP_LT
4619 && comp_start_end
== CMP_GT
))
4621 if (compare_bound (AR_START
, as
->lower
[i
]) == CMP_LT
)
4623 gfc_warning (0, "Lower array reference at %L is out of bounds "
4624 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4625 mpz_get_si (AR_START
->value
.integer
),
4626 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4629 if (compare_bound (AR_START
, as
->upper
[i
]) == CMP_GT
)
4631 gfc_warning (0, "Lower array reference at %L is out of bounds "
4632 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4633 mpz_get_si (AR_START
->value
.integer
),
4634 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4639 /* If we can compute the highest index of the array section,
4640 then it also has to be between lower and upper. */
4641 mpz_init (last_value
);
4642 if (compute_last_value_for_triplet (AR_START
, AR_END
, ar
->stride
[i
],
4645 if (compare_bound_mpz_t (as
->lower
[i
], last_value
) == CMP_GT
)
4647 gfc_warning (0, "Upper array reference at %L is out of bounds "
4648 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4649 mpz_get_si (last_value
),
4650 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4651 mpz_clear (last_value
);
4654 if (compare_bound_mpz_t (as
->upper
[i
], last_value
) == CMP_LT
)
4656 gfc_warning (0, "Upper array reference at %L is out of bounds "
4657 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4658 mpz_get_si (last_value
),
4659 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4660 mpz_clear (last_value
);
4664 mpz_clear (last_value
);
4672 gfc_internal_error ("check_dimension(): Bad array reference");
4679 /* Compare an array reference with an array specification. */
4682 compare_spec_to_ref (gfc_array_ref
*ar
)
4689 /* TODO: Full array sections are only allowed as actual parameters. */
4690 if (as
->type
== AS_ASSUMED_SIZE
4691 && (/*ar->type == AR_FULL
4692 ||*/ (ar
->type
== AR_SECTION
4693 && ar
->dimen_type
[i
] == DIMEN_RANGE
&& ar
->end
[i
] == NULL
)))
4695 gfc_error ("Rightmost upper bound of assumed size array section "
4696 "not specified at %L", &ar
->where
);
4700 if (ar
->type
== AR_FULL
)
4703 if (as
->rank
!= ar
->dimen
)
4705 gfc_error ("Rank mismatch in array reference at %L (%d/%d)",
4706 &ar
->where
, ar
->dimen
, as
->rank
);
4710 /* ar->codimen == 0 is a local array. */
4711 if (as
->corank
!= ar
->codimen
&& ar
->codimen
!= 0)
4713 gfc_error ("Coindex rank mismatch in array reference at %L (%d/%d)",
4714 &ar
->where
, ar
->codimen
, as
->corank
);
4718 for (i
= 0; i
< as
->rank
; i
++)
4719 if (!check_dimension (i
, ar
, as
))
4722 /* Local access has no coarray spec. */
4723 if (ar
->codimen
!= 0)
4724 for (i
= as
->rank
; i
< as
->rank
+ as
->corank
; i
++)
4726 if (ar
->dimen_type
[i
] != DIMEN_ELEMENT
&& !ar
->in_allocate
4727 && ar
->dimen_type
[i
] != DIMEN_THIS_IMAGE
)
4729 gfc_error ("Coindex of codimension %d must be a scalar at %L",
4730 i
+ 1 - as
->rank
, &ar
->where
);
4733 if (!check_dimension (i
, ar
, as
))
4741 /* Resolve one part of an array index. */
4744 gfc_resolve_index_1 (gfc_expr
*index
, int check_scalar
,
4745 int force_index_integer_kind
)
4752 if (!gfc_resolve_expr (index
))
4755 if (check_scalar
&& index
->rank
!= 0)
4757 gfc_error ("Array index at %L must be scalar", &index
->where
);
4761 if (index
->ts
.type
!= BT_INTEGER
&& index
->ts
.type
!= BT_REAL
)
4763 gfc_error ("Array index at %L must be of INTEGER type, found %s",
4764 &index
->where
, gfc_basic_typename (index
->ts
.type
));
4768 if (index
->ts
.type
== BT_REAL
)
4769 if (!gfc_notify_std (GFC_STD_LEGACY
, "REAL array index at %L",
4773 if ((index
->ts
.kind
!= gfc_index_integer_kind
4774 && force_index_integer_kind
)
4775 || index
->ts
.type
!= BT_INTEGER
)
4778 ts
.type
= BT_INTEGER
;
4779 ts
.kind
= gfc_index_integer_kind
;
4781 gfc_convert_type_warn (index
, &ts
, 2, 0);
4787 /* Resolve one part of an array index. */
4790 gfc_resolve_index (gfc_expr
*index
, int check_scalar
)
4792 return gfc_resolve_index_1 (index
, check_scalar
, 1);
4795 /* Resolve a dim argument to an intrinsic function. */
4798 gfc_resolve_dim_arg (gfc_expr
*dim
)
4803 if (!gfc_resolve_expr (dim
))
4808 gfc_error ("Argument dim at %L must be scalar", &dim
->where
);
4813 if (dim
->ts
.type
!= BT_INTEGER
)
4815 gfc_error ("Argument dim at %L must be of INTEGER type", &dim
->where
);
4819 if (dim
->ts
.kind
!= gfc_index_integer_kind
)
4824 ts
.type
= BT_INTEGER
;
4825 ts
.kind
= gfc_index_integer_kind
;
4827 gfc_convert_type_warn (dim
, &ts
, 2, 0);
4833 /* Given an expression that contains array references, update those array
4834 references to point to the right array specifications. While this is
4835 filled in during matching, this information is difficult to save and load
4836 in a module, so we take care of it here.
4838 The idea here is that the original array reference comes from the
4839 base symbol. We traverse the list of reference structures, setting
4840 the stored reference to references. Component references can
4841 provide an additional array specification. */
4844 find_array_spec (gfc_expr
*e
)
4849 bool class_as
= false;
4851 if (e
->symtree
->n
.sym
->ts
.type
== BT_CLASS
)
4853 as
= CLASS_DATA (e
->symtree
->n
.sym
)->as
;
4857 as
= e
->symtree
->n
.sym
->as
;
4859 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4864 gfc_internal_error ("find_array_spec(): Missing spec");
4871 c
= ref
->u
.c
.component
;
4872 if (c
->attr
.dimension
)
4874 if (as
!= NULL
&& !(class_as
&& as
== c
->as
))
4875 gfc_internal_error ("find_array_spec(): unused as(1)");
4887 gfc_internal_error ("find_array_spec(): unused as(2)");
4891 /* Resolve an array reference. */
4894 resolve_array_ref (gfc_array_ref
*ar
)
4896 int i
, check_scalar
;
4899 for (i
= 0; i
< ar
->dimen
+ ar
->codimen
; i
++)
4901 check_scalar
= ar
->dimen_type
[i
] == DIMEN_RANGE
;
4903 /* Do not force gfc_index_integer_kind for the start. We can
4904 do fine with any integer kind. This avoids temporary arrays
4905 created for indexing with a vector. */
4906 if (!gfc_resolve_index_1 (ar
->start
[i
], check_scalar
, 0))
4908 if (!gfc_resolve_index (ar
->end
[i
], check_scalar
))
4910 if (!gfc_resolve_index (ar
->stride
[i
], check_scalar
))
4915 if (ar
->dimen_type
[i
] == DIMEN_UNKNOWN
)
4919 ar
->dimen_type
[i
] = DIMEN_ELEMENT
;
4923 ar
->dimen_type
[i
] = DIMEN_VECTOR
;
4924 if (e
->expr_type
== EXPR_VARIABLE
4925 && e
->symtree
->n
.sym
->ts
.type
== BT_DERIVED
)
4926 ar
->start
[i
] = gfc_get_parentheses (e
);
4930 gfc_error ("Array index at %L is an array of rank %d",
4931 &ar
->c_where
[i
], e
->rank
);
4935 /* Fill in the upper bound, which may be lower than the
4936 specified one for something like a(2:10:5), which is
4937 identical to a(2:7:5). Only relevant for strides not equal
4938 to one. Don't try a division by zero. */
4939 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4940 && ar
->stride
[i
] != NULL
&& ar
->stride
[i
]->expr_type
== EXPR_CONSTANT
4941 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 1L) != 0
4942 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 0L) != 0)
4946 if (gfc_ref_dimen_size (ar
, i
, &size
, &end
))
4948 if (ar
->end
[i
] == NULL
)
4951 gfc_get_constant_expr (BT_INTEGER
, gfc_index_integer_kind
,
4953 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4955 else if (ar
->end
[i
]->ts
.type
== BT_INTEGER
4956 && ar
->end
[i
]->expr_type
== EXPR_CONSTANT
)
4958 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4969 if (ar
->type
== AR_FULL
)
4971 if (ar
->as
->rank
== 0)
4972 ar
->type
= AR_ELEMENT
;
4974 /* Make sure array is the same as array(:,:), this way
4975 we don't need to special case all the time. */
4976 ar
->dimen
= ar
->as
->rank
;
4977 for (i
= 0; i
< ar
->dimen
; i
++)
4979 ar
->dimen_type
[i
] = DIMEN_RANGE
;
4981 gcc_assert (ar
->start
[i
] == NULL
);
4982 gcc_assert (ar
->end
[i
] == NULL
);
4983 gcc_assert (ar
->stride
[i
] == NULL
);
4987 /* If the reference type is unknown, figure out what kind it is. */
4989 if (ar
->type
== AR_UNKNOWN
)
4991 ar
->type
= AR_ELEMENT
;
4992 for (i
= 0; i
< ar
->dimen
; i
++)
4993 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4994 || ar
->dimen_type
[i
] == DIMEN_VECTOR
)
4996 ar
->type
= AR_SECTION
;
5001 if (!ar
->as
->cray_pointee
&& !compare_spec_to_ref (ar
))
5004 if (ar
->as
->corank
&& ar
->codimen
== 0)
5007 ar
->codimen
= ar
->as
->corank
;
5008 for (n
= ar
->dimen
; n
< ar
->dimen
+ ar
->codimen
; n
++)
5009 ar
->dimen_type
[n
] = DIMEN_THIS_IMAGE
;
5017 resolve_substring (gfc_ref
*ref
, bool *equal_length
)
5019 int k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
5021 if (ref
->u
.ss
.start
!= NULL
)
5023 if (!gfc_resolve_expr (ref
->u
.ss
.start
))
5026 if (ref
->u
.ss
.start
->ts
.type
!= BT_INTEGER
)
5028 gfc_error ("Substring start index at %L must be of type INTEGER",
5029 &ref
->u
.ss
.start
->where
);
5033 if (ref
->u
.ss
.start
->rank
!= 0)
5035 gfc_error ("Substring start index at %L must be scalar",
5036 &ref
->u
.ss
.start
->where
);
5040 if (compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_LT
5041 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
5042 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
5044 gfc_error ("Substring start index at %L is less than one",
5045 &ref
->u
.ss
.start
->where
);
5050 if (ref
->u
.ss
.end
!= NULL
)
5052 if (!gfc_resolve_expr (ref
->u
.ss
.end
))
5055 if (ref
->u
.ss
.end
->ts
.type
!= BT_INTEGER
)
5057 gfc_error ("Substring end index at %L must be of type INTEGER",
5058 &ref
->u
.ss
.end
->where
);
5062 if (ref
->u
.ss
.end
->rank
!= 0)
5064 gfc_error ("Substring end index at %L must be scalar",
5065 &ref
->u
.ss
.end
->where
);
5069 if (ref
->u
.ss
.length
!= NULL
5070 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_GT
5071 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
5072 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
5074 gfc_error ("Substring end index at %L exceeds the string length",
5075 &ref
->u
.ss
.start
->where
);
5079 if (compare_bound_mpz_t (ref
->u
.ss
.end
,
5080 gfc_integer_kinds
[k
].huge
) == CMP_GT
5081 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
5082 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
5084 gfc_error ("Substring end index at %L is too large",
5085 &ref
->u
.ss
.end
->where
);
5088 /* If the substring has the same length as the original
5089 variable, the reference itself can be deleted. */
5091 if (ref
->u
.ss
.length
!= NULL
5092 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_EQ
5093 && compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_EQ
)
5094 *equal_length
= true;
5101 /* This function supplies missing substring charlens. */
5104 gfc_resolve_substring_charlen (gfc_expr
*e
)
5107 gfc_expr
*start
, *end
;
5108 gfc_typespec
*ts
= NULL
;
5111 for (char_ref
= e
->ref
; char_ref
; char_ref
= char_ref
->next
)
5113 if (char_ref
->type
== REF_SUBSTRING
|| char_ref
->type
== REF_INQUIRY
)
5115 if (char_ref
->type
== REF_COMPONENT
)
5116 ts
= &char_ref
->u
.c
.component
->ts
;
5119 if (!char_ref
|| char_ref
->type
== REF_INQUIRY
)
5122 gcc_assert (char_ref
->next
== NULL
);
5126 if (e
->ts
.u
.cl
->length
)
5127 gfc_free_expr (e
->ts
.u
.cl
->length
);
5128 else if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
->attr
.dummy
)
5132 e
->ts
.type
= BT_CHARACTER
;
5133 e
->ts
.kind
= gfc_default_character_kind
;
5136 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5138 if (char_ref
->u
.ss
.start
)
5139 start
= gfc_copy_expr (char_ref
->u
.ss
.start
);
5141 start
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 1);
5143 if (char_ref
->u
.ss
.end
)
5144 end
= gfc_copy_expr (char_ref
->u
.ss
.end
);
5145 else if (e
->expr_type
== EXPR_VARIABLE
)
5148 ts
= &e
->symtree
->n
.sym
->ts
;
5149 end
= gfc_copy_expr (ts
->u
.cl
->length
);
5156 gfc_free_expr (start
);
5157 gfc_free_expr (end
);
5161 /* Length = (end - start + 1).
5162 Check first whether it has a constant length. */
5163 if (gfc_dep_difference (end
, start
, &diff
))
5165 gfc_expr
*len
= gfc_get_constant_expr (BT_INTEGER
, gfc_charlen_int_kind
,
5168 mpz_add_ui (len
->value
.integer
, diff
, 1);
5170 e
->ts
.u
.cl
->length
= len
;
5171 /* The check for length < 0 is handled below */
5175 e
->ts
.u
.cl
->length
= gfc_subtract (end
, start
);
5176 e
->ts
.u
.cl
->length
= gfc_add (e
->ts
.u
.cl
->length
,
5177 gfc_get_int_expr (gfc_charlen_int_kind
,
5181 /* F2008, 6.4.1: Both the starting point and the ending point shall
5182 be within the range 1, 2, ..., n unless the starting point exceeds
5183 the ending point, in which case the substring has length zero. */
5185 if (mpz_cmp_si (e
->ts
.u
.cl
->length
->value
.integer
, 0) < 0)
5186 mpz_set_si (e
->ts
.u
.cl
->length
->value
.integer
, 0);
5188 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5189 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5191 /* Make sure that the length is simplified. */
5192 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 1);
5193 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5197 /* Resolve subtype references. */
5200 gfc_resolve_ref (gfc_expr
*expr
)
5202 int current_part_dimension
, n_components
, seen_part_dimension
, dim
;
5203 gfc_ref
*ref
, **prev
, *array_ref
;
5206 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5207 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.as
== NULL
)
5209 find_array_spec (expr
);
5213 for (prev
= &expr
->ref
; *prev
!= NULL
;
5214 prev
= *prev
== NULL
? prev
: &(*prev
)->next
)
5215 switch ((*prev
)->type
)
5218 if (!resolve_array_ref (&(*prev
)->u
.ar
))
5227 equal_length
= false;
5228 if (!resolve_substring (*prev
, &equal_length
))
5231 if (expr
->expr_type
!= EXPR_SUBSTRING
&& equal_length
)
5233 /* Remove the reference and move the charlen, if any. */
5237 expr
->ts
.u
.cl
= ref
->u
.ss
.length
;
5238 ref
->u
.ss
.length
= NULL
;
5239 gfc_free_ref_list (ref
);
5244 /* Check constraints on part references. */
5246 current_part_dimension
= 0;
5247 seen_part_dimension
= 0;
5251 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5257 switch (ref
->u
.ar
.type
)
5260 /* Coarray scalar. */
5261 if (ref
->u
.ar
.as
->rank
== 0)
5263 current_part_dimension
= 0;
5268 current_part_dimension
= 1;
5273 current_part_dimension
= 0;
5277 gfc_internal_error ("resolve_ref(): Bad array reference");
5283 if (current_part_dimension
|| seen_part_dimension
)
5286 if (ref
->u
.c
.component
->attr
.pointer
5287 || ref
->u
.c
.component
->attr
.proc_pointer
5288 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5289 && CLASS_DATA (ref
->u
.c
.component
)->attr
.pointer
))
5291 gfc_error ("Component to the right of a part reference "
5292 "with nonzero rank must not have the POINTER "
5293 "attribute at %L", &expr
->where
);
5296 else if (ref
->u
.c
.component
->attr
.allocatable
5297 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5298 && CLASS_DATA (ref
->u
.c
.component
)->attr
.allocatable
))
5301 gfc_error ("Component to the right of a part reference "
5302 "with nonzero rank must not have the ALLOCATABLE "
5303 "attribute at %L", &expr
->where
);
5315 /* Implement requirement in note 9.7 of F2018 that the result of the
5316 LEN inquiry be a scalar. */
5317 if (ref
->u
.i
== INQUIRY_LEN
&& array_ref
&& expr
->ts
.deferred
)
5319 array_ref
->u
.ar
.type
= AR_ELEMENT
;
5321 /* INQUIRY_LEN is not evaluated from the rest of the expr
5322 but directly from the string length. This means that setting
5323 the array indices to one does not matter but might trigger
5324 a runtime bounds error. Suppress the check. */
5325 expr
->no_bounds_check
= 1;
5326 for (dim
= 0; dim
< array_ref
->u
.ar
.dimen
; dim
++)
5328 array_ref
->u
.ar
.dimen_type
[dim
] = DIMEN_ELEMENT
;
5329 if (array_ref
->u
.ar
.start
[dim
])
5330 gfc_free_expr (array_ref
->u
.ar
.start
[dim
]);
5331 array_ref
->u
.ar
.start
[dim
]
5332 = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
5333 if (array_ref
->u
.ar
.end
[dim
])
5334 gfc_free_expr (array_ref
->u
.ar
.end
[dim
]);
5335 if (array_ref
->u
.ar
.stride
[dim
])
5336 gfc_free_expr (array_ref
->u
.ar
.stride
[dim
]);
5342 if (((ref
->type
== REF_COMPONENT
&& n_components
> 1)
5343 || ref
->next
== NULL
)
5344 && current_part_dimension
5345 && seen_part_dimension
)
5347 gfc_error ("Two or more part references with nonzero rank must "
5348 "not be specified at %L", &expr
->where
);
5352 if (ref
->type
== REF_COMPONENT
)
5354 if (current_part_dimension
)
5355 seen_part_dimension
= 1;
5357 /* reset to make sure */
5358 current_part_dimension
= 0;
5366 /* Given an expression, determine its shape. This is easier than it sounds.
5367 Leaves the shape array NULL if it is not possible to determine the shape. */
5370 expression_shape (gfc_expr
*e
)
5372 mpz_t array
[GFC_MAX_DIMENSIONS
];
5375 if (e
->rank
<= 0 || e
->shape
!= NULL
)
5378 for (i
= 0; i
< e
->rank
; i
++)
5379 if (!gfc_array_dimen_size (e
, i
, &array
[i
]))
5382 e
->shape
= gfc_get_shape (e
->rank
);
5384 memcpy (e
->shape
, array
, e
->rank
* sizeof (mpz_t
));
5389 for (i
--; i
>= 0; i
--)
5390 mpz_clear (array
[i
]);
5394 /* Given a variable expression node, compute the rank of the expression by
5395 examining the base symbol and any reference structures it may have. */
5398 gfc_expression_rank (gfc_expr
*e
)
5403 /* Just to make sure, because EXPR_COMPCALL's also have an e->ref and that
5404 could lead to serious confusion... */
5405 gcc_assert (e
->expr_type
!= EXPR_COMPCALL
);
5409 if (e
->expr_type
== EXPR_ARRAY
)
5411 /* Constructors can have a rank different from one via RESHAPE(). */
5413 e
->rank
= ((e
->symtree
== NULL
|| e
->symtree
->n
.sym
->as
== NULL
)
5414 ? 0 : e
->symtree
->n
.sym
->as
->rank
);
5420 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5422 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.proc_pointer
5423 && ref
->u
.c
.component
->attr
.function
&& !ref
->next
)
5424 rank
= ref
->u
.c
.component
->as
? ref
->u
.c
.component
->as
->rank
: 0;
5426 if (ref
->type
!= REF_ARRAY
)
5429 if (ref
->u
.ar
.type
== AR_FULL
)
5431 rank
= ref
->u
.ar
.as
->rank
;
5435 if (ref
->u
.ar
.type
== AR_SECTION
)
5437 /* Figure out the rank of the section. */
5439 gfc_internal_error ("gfc_expression_rank(): Two array specs");
5441 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
5442 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_RANGE
5443 || ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
)
5453 expression_shape (e
);
5458 add_caf_get_intrinsic (gfc_expr
*e
)
5460 gfc_expr
*wrapper
, *tmp_expr
;
5464 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5465 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5470 for (n
= ref
->u
.ar
.dimen
; n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
5471 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_ELEMENT
)
5474 tmp_expr
= XCNEW (gfc_expr
);
5476 wrapper
= gfc_build_intrinsic_call (gfc_current_ns
, GFC_ISYM_CAF_GET
,
5477 "caf_get", tmp_expr
->where
, 1, tmp_expr
);
5478 wrapper
->ts
= e
->ts
;
5479 wrapper
->rank
= e
->rank
;
5481 wrapper
->shape
= gfc_copy_shape (e
->shape
, e
->rank
);
5488 remove_caf_get_intrinsic (gfc_expr
*e
)
5490 gcc_assert (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
5491 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
);
5492 gfc_expr
*e2
= e
->value
.function
.actual
->expr
;
5493 e
->value
.function
.actual
->expr
= NULL
;
5494 gfc_free_actual_arglist (e
->value
.function
.actual
);
5495 gfc_free_shape (&e
->shape
, e
->rank
);
5501 /* Resolve a variable expression. */
5504 resolve_variable (gfc_expr
*e
)
5511 if (e
->symtree
== NULL
)
5513 sym
= e
->symtree
->n
.sym
;
5515 /* Use same check as for TYPE(*) below; this check has to be before TYPE(*)
5516 as ts.type is set to BT_ASSUMED in resolve_symbol. */
5517 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
5519 if (!actual_arg
|| inquiry_argument
)
5521 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may only "
5522 "be used as actual argument", sym
->name
, &e
->where
);
5526 /* TS 29113, 407b. */
5527 else if (e
->ts
.type
== BT_ASSUMED
)
5531 gfc_error ("Assumed-type variable %s at %L may only be used "
5532 "as actual argument", sym
->name
, &e
->where
);
5535 else if (inquiry_argument
&& !first_actual_arg
)
5537 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5538 for all inquiry functions in resolve_function; the reason is
5539 that the function-name resolution happens too late in that
5541 gfc_error ("Assumed-type variable %s at %L as actual argument to "
5542 "an inquiry function shall be the first argument",
5543 sym
->name
, &e
->where
);
5547 /* TS 29113, C535b. */
5548 else if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5549 && CLASS_DATA (sym
)->as
5550 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5551 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5552 && sym
->as
->type
== AS_ASSUMED_RANK
))
5553 && !sym
->attr
.select_rank_temporary
)
5556 && !(cs_base
&& cs_base
->current
5557 && cs_base
->current
->op
== EXEC_SELECT_RANK
))
5559 gfc_error ("Assumed-rank variable %s at %L may only be used as "
5560 "actual argument", sym
->name
, &e
->where
);
5563 else if (inquiry_argument
&& !first_actual_arg
)
5565 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5566 for all inquiry functions in resolve_function; the reason is
5567 that the function-name resolution happens too late in that
5569 gfc_error ("Assumed-rank variable %s at %L as actual argument "
5570 "to an inquiry function shall be the first argument",
5571 sym
->name
, &e
->where
);
5576 if ((sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
)) && e
->ref
5577 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5578 && e
->ref
->next
== NULL
))
5580 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall not have "
5581 "a subobject reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5584 /* TS 29113, 407b. */
5585 else if (e
->ts
.type
== BT_ASSUMED
&& e
->ref
5586 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5587 && e
->ref
->next
== NULL
))
5589 gfc_error ("Assumed-type variable %s at %L shall not have a subobject "
5590 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5594 /* TS 29113, C535b. */
5595 if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5596 && CLASS_DATA (sym
)->as
5597 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5598 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5599 && sym
->as
->type
== AS_ASSUMED_RANK
))
5601 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5602 && e
->ref
->next
== NULL
))
5604 gfc_error ("Assumed-rank variable %s at %L shall not have a subobject "
5605 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5609 /* For variables that are used in an associate (target => object) where
5610 the object's basetype is array valued while the target is scalar,
5611 the ts' type of the component refs is still array valued, which
5612 can't be translated that way. */
5613 if (sym
->assoc
&& e
->rank
== 0 && e
->ref
&& sym
->ts
.type
== BT_CLASS
5614 && sym
->assoc
->target
&& sym
->assoc
->target
->ts
.type
== BT_CLASS
5615 && CLASS_DATA (sym
->assoc
->target
)->as
)
5617 gfc_ref
*ref
= e
->ref
;
5623 ref
->u
.c
.sym
= sym
->ts
.u
.derived
;
5624 /* Stop the loop. */
5634 /* If this is an associate-name, it may be parsed with an array reference
5635 in error even though the target is scalar. Fail directly in this case.
5636 TODO Understand why class scalar expressions must be excluded. */
5637 if (sym
->assoc
&& !(sym
->ts
.type
== BT_CLASS
&& e
->rank
== 0))
5639 if (sym
->ts
.type
== BT_CLASS
)
5640 gfc_fix_class_refs (e
);
5641 if (!sym
->attr
.dimension
&& e
->ref
&& e
->ref
->type
== REF_ARRAY
)
5643 else if (sym
->attr
.dimension
&& (!e
->ref
|| e
->ref
->type
!= REF_ARRAY
))
5645 /* This can happen because the parser did not detect that the
5646 associate name is an array and the expression had no array
5648 gfc_ref
*ref
= gfc_get_ref ();
5649 ref
->type
= REF_ARRAY
;
5650 ref
->u
.ar
= *gfc_get_array_ref();
5651 ref
->u
.ar
.type
= AR_FULL
;
5654 ref
->u
.ar
.as
= sym
->as
;
5655 ref
->u
.ar
.dimen
= sym
->as
->rank
;
5663 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.generic
)
5664 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
5666 /* On the other hand, the parser may not have known this is an array;
5667 in this case, we have to add a FULL reference. */
5668 if (sym
->assoc
&& sym
->attr
.dimension
&& !e
->ref
)
5670 e
->ref
= gfc_get_ref ();
5671 e
->ref
->type
= REF_ARRAY
;
5672 e
->ref
->u
.ar
.type
= AR_FULL
;
5673 e
->ref
->u
.ar
.dimen
= 0;
5676 /* Like above, but for class types, where the checking whether an array
5677 ref is present is more complicated. Furthermore make sure not to add
5678 the full array ref to _vptr or _len refs. */
5679 if (sym
->assoc
&& sym
->ts
.type
== BT_CLASS
5680 && CLASS_DATA (sym
)->attr
.dimension
5681 && (e
->ts
.type
!= BT_DERIVED
|| !e
->ts
.u
.derived
->attr
.vtype
))
5683 gfc_ref
*ref
, *newref
;
5685 newref
= gfc_get_ref ();
5686 newref
->type
= REF_ARRAY
;
5687 newref
->u
.ar
.type
= AR_FULL
;
5688 newref
->u
.ar
.dimen
= 0;
5689 /* Because this is an associate var and the first ref either is a ref to
5690 the _data component or not, no traversal of the ref chain is
5691 needed. The array ref needs to be inserted after the _data ref,
5692 or when that is not present, which may happend for polymorphic
5693 types, then at the first position. */
5697 else if (ref
->type
== REF_COMPONENT
5698 && strcmp ("_data", ref
->u
.c
.component
->name
) == 0)
5700 if (!ref
->next
|| ref
->next
->type
!= REF_ARRAY
)
5702 newref
->next
= ref
->next
;
5706 /* Array ref present already. */
5707 gfc_free_ref_list (newref
);
5709 else if (ref
->type
== REF_ARRAY
)
5710 /* Array ref present already. */
5711 gfc_free_ref_list (newref
);
5719 if (e
->ref
&& !gfc_resolve_ref (e
))
5722 if (sym
->attr
.flavor
== FL_PROCEDURE
5723 && (!sym
->attr
.function
5724 || (sym
->attr
.function
&& sym
->result
5725 && sym
->result
->attr
.proc_pointer
5726 && !sym
->result
->attr
.function
)))
5728 e
->ts
.type
= BT_PROCEDURE
;
5729 goto resolve_procedure
;
5732 if (sym
->ts
.type
!= BT_UNKNOWN
)
5733 gfc_variable_attr (e
, &e
->ts
);
5734 else if (sym
->attr
.flavor
== FL_PROCEDURE
5735 && sym
->attr
.function
&& sym
->result
5736 && sym
->result
->ts
.type
!= BT_UNKNOWN
5737 && sym
->result
->attr
.proc_pointer
)
5738 e
->ts
= sym
->result
->ts
;
5741 /* Must be a simple variable reference. */
5742 if (!gfc_set_default_type (sym
, 1, sym
->ns
))
5747 if (check_assumed_size_reference (sym
, e
))
5750 /* Deal with forward references to entries during gfc_resolve_code, to
5751 satisfy, at least partially, 12.5.2.5. */
5752 if (gfc_current_ns
->entries
5753 && current_entry_id
== sym
->entry_id
5756 && cs_base
->current
->op
!= EXEC_ENTRY
)
5758 gfc_entry_list
*entry
;
5759 gfc_formal_arglist
*formal
;
5761 bool seen
, saved_specification_expr
;
5763 /* If the symbol is a dummy... */
5764 if (sym
->attr
.dummy
&& sym
->ns
== gfc_current_ns
)
5766 entry
= gfc_current_ns
->entries
;
5769 /* ...test if the symbol is a parameter of previous entries. */
5770 for (; entry
&& entry
->id
<= current_entry_id
; entry
= entry
->next
)
5771 for (formal
= entry
->sym
->formal
; formal
; formal
= formal
->next
)
5773 if (formal
->sym
&& sym
->name
== formal
->sym
->name
)
5780 /* If it has not been seen as a dummy, this is an error. */
5783 if (specification_expr
)
5784 gfc_error ("Variable %qs, used in a specification expression"
5785 ", is referenced at %L before the ENTRY statement "
5786 "in which it is a parameter",
5787 sym
->name
, &cs_base
->current
->loc
);
5789 gfc_error ("Variable %qs is used at %L before the ENTRY "
5790 "statement in which it is a parameter",
5791 sym
->name
, &cs_base
->current
->loc
);
5796 /* Now do the same check on the specification expressions. */
5797 saved_specification_expr
= specification_expr
;
5798 specification_expr
= true;
5799 if (sym
->ts
.type
== BT_CHARACTER
5800 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
5804 for (n
= 0; n
< sym
->as
->rank
; n
++)
5806 if (!gfc_resolve_expr (sym
->as
->lower
[n
]))
5808 if (!gfc_resolve_expr (sym
->as
->upper
[n
]))
5811 specification_expr
= saved_specification_expr
;
5814 /* Update the symbol's entry level. */
5815 sym
->entry_id
= current_entry_id
+ 1;
5818 /* If a symbol has been host_associated mark it. This is used latter,
5819 to identify if aliasing is possible via host association. */
5820 if (sym
->attr
.flavor
== FL_VARIABLE
5821 && gfc_current_ns
->parent
5822 && (gfc_current_ns
->parent
== sym
->ns
5823 || (gfc_current_ns
->parent
->parent
5824 && gfc_current_ns
->parent
->parent
== sym
->ns
)))
5825 sym
->attr
.host_assoc
= 1;
5827 if (gfc_current_ns
->proc_name
5828 && sym
->attr
.dimension
5829 && (sym
->ns
!= gfc_current_ns
5830 || sym
->attr
.use_assoc
5831 || sym
->attr
.in_common
))
5832 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
5835 if (t
&& !resolve_procedure_expression (e
))
5838 /* F2008, C617 and C1229. */
5839 if (!inquiry_argument
&& (e
->ts
.type
== BT_CLASS
|| e
->ts
.type
== BT_DERIVED
)
5840 && gfc_is_coindexed (e
))
5842 gfc_ref
*ref
, *ref2
= NULL
;
5844 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5846 if (ref
->type
== REF_COMPONENT
)
5848 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5852 for ( ; ref
; ref
= ref
->next
)
5853 if (ref
->type
== REF_COMPONENT
)
5856 /* Expression itself is not coindexed object. */
5857 if (ref
&& e
->ts
.type
== BT_CLASS
)
5859 gfc_error ("Polymorphic subobject of coindexed object at %L",
5864 /* Expression itself is coindexed object. */
5868 c
= ref2
? ref2
->u
.c
.component
: e
->symtree
->n
.sym
->components
;
5869 for ( ; c
; c
= c
->next
)
5870 if (c
->attr
.allocatable
&& c
->ts
.type
== BT_CLASS
)
5872 gfc_error ("Coindexed object with polymorphic allocatable "
5873 "subcomponent at %L", &e
->where
);
5881 gfc_expression_rank (e
);
5883 if (t
&& flag_coarray
== GFC_FCOARRAY_LIB
&& gfc_is_coindexed (e
))
5884 add_caf_get_intrinsic (e
);
5886 /* Simplify cases where access to a parameter array results in a
5887 single constant. Suppress errors since those will have been
5888 issued before, as warnings. */
5889 if (e
->rank
== 0 && sym
->as
&& sym
->attr
.flavor
== FL_PARAMETER
)
5891 gfc_push_suppress_errors ();
5892 gfc_simplify_expr (e
, 1);
5893 gfc_pop_suppress_errors ();
5900 /* Checks to see that the correct symbol has been host associated.
5901 The only situation where this arises is that in which a twice
5902 contained function is parsed after the host association is made.
5903 Therefore, on detecting this, change the symbol in the expression
5904 and convert the array reference into an actual arglist if the old
5905 symbol is a variable. */
5907 check_host_association (gfc_expr
*e
)
5909 gfc_symbol
*sym
, *old_sym
;
5913 gfc_actual_arglist
*arg
, *tail
= NULL
;
5914 bool retval
= e
->expr_type
== EXPR_FUNCTION
;
5916 /* If the expression is the result of substitution in
5917 interface.c(gfc_extend_expr) because there is no way in
5918 which the host association can be wrong. */
5919 if (e
->symtree
== NULL
5920 || e
->symtree
->n
.sym
== NULL
5921 || e
->user_operator
)
5924 old_sym
= e
->symtree
->n
.sym
;
5926 if (gfc_current_ns
->parent
5927 && old_sym
->ns
!= gfc_current_ns
)
5929 /* Use the 'USE' name so that renamed module symbols are
5930 correctly handled. */
5931 gfc_find_symbol (e
->symtree
->name
, gfc_current_ns
, 1, &sym
);
5933 if (sym
&& old_sym
!= sym
5934 && sym
->ts
.type
== old_sym
->ts
.type
5935 && sym
->attr
.flavor
== FL_PROCEDURE
5936 && sym
->attr
.contained
)
5938 /* Clear the shape, since it might not be valid. */
5939 gfc_free_shape (&e
->shape
, e
->rank
);
5941 /* Give the expression the right symtree! */
5942 gfc_find_sym_tree (e
->symtree
->name
, NULL
, 1, &st
);
5943 gcc_assert (st
!= NULL
);
5945 if (old_sym
->attr
.flavor
== FL_PROCEDURE
5946 || e
->expr_type
== EXPR_FUNCTION
)
5948 /* Original was function so point to the new symbol, since
5949 the actual argument list is already attached to the
5951 e
->value
.function
.esym
= NULL
;
5956 /* Original was variable so convert array references into
5957 an actual arglist. This does not need any checking now
5958 since resolve_function will take care of it. */
5959 e
->value
.function
.actual
= NULL
;
5960 e
->expr_type
= EXPR_FUNCTION
;
5963 /* Ambiguity will not arise if the array reference is not
5964 the last reference. */
5965 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5966 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
5969 gcc_assert (ref
->type
== REF_ARRAY
);
5971 /* Grab the start expressions from the array ref and
5972 copy them into actual arguments. */
5973 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
5975 arg
= gfc_get_actual_arglist ();
5976 arg
->expr
= gfc_copy_expr (ref
->u
.ar
.start
[n
]);
5977 if (e
->value
.function
.actual
== NULL
)
5978 tail
= e
->value
.function
.actual
= arg
;
5986 /* Dump the reference list and set the rank. */
5987 gfc_free_ref_list (e
->ref
);
5989 e
->rank
= sym
->as
? sym
->as
->rank
: 0;
5992 gfc_resolve_expr (e
);
5996 /* This might have changed! */
5997 return e
->expr_type
== EXPR_FUNCTION
;
6002 gfc_resolve_character_operator (gfc_expr
*e
)
6004 gfc_expr
*op1
= e
->value
.op
.op1
;
6005 gfc_expr
*op2
= e
->value
.op
.op2
;
6006 gfc_expr
*e1
= NULL
;
6007 gfc_expr
*e2
= NULL
;
6009 gcc_assert (e
->value
.op
.op
== INTRINSIC_CONCAT
);
6011 if (op1
->ts
.u
.cl
&& op1
->ts
.u
.cl
->length
)
6012 e1
= gfc_copy_expr (op1
->ts
.u
.cl
->length
);
6013 else if (op1
->expr_type
== EXPR_CONSTANT
)
6014 e1
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
6015 op1
->value
.character
.length
);
6017 if (op2
->ts
.u
.cl
&& op2
->ts
.u
.cl
->length
)
6018 e2
= gfc_copy_expr (op2
->ts
.u
.cl
->length
);
6019 else if (op2
->expr_type
== EXPR_CONSTANT
)
6020 e2
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
6021 op2
->value
.character
.length
);
6023 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
6033 e
->ts
.u
.cl
->length
= gfc_add (e1
, e2
);
6034 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
6035 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
6036 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 0);
6037 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
6043 /* Ensure that an character expression has a charlen and, if possible, a
6044 length expression. */
6047 fixup_charlen (gfc_expr
*e
)
6049 /* The cases fall through so that changes in expression type and the need
6050 for multiple fixes are picked up. In all circumstances, a charlen should
6051 be available for the middle end to hang a backend_decl on. */
6052 switch (e
->expr_type
)
6055 gfc_resolve_character_operator (e
);
6059 if (e
->expr_type
== EXPR_ARRAY
)
6060 gfc_resolve_character_array_constructor (e
);
6063 case EXPR_SUBSTRING
:
6064 if (!e
->ts
.u
.cl
&& e
->ref
)
6065 gfc_resolve_substring_charlen (e
);
6070 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
6077 /* Update an actual argument to include the passed-object for type-bound
6078 procedures at the right position. */
6080 static gfc_actual_arglist
*
6081 update_arglist_pass (gfc_actual_arglist
* lst
, gfc_expr
* po
, unsigned argpos
,
6084 gcc_assert (argpos
> 0);
6088 gfc_actual_arglist
* result
;
6090 result
= gfc_get_actual_arglist ();
6094 result
->name
= name
;
6100 lst
->next
= update_arglist_pass (lst
->next
, po
, argpos
- 1, name
);
6102 lst
= update_arglist_pass (NULL
, po
, argpos
- 1, name
);
6107 /* Extract the passed-object from an EXPR_COMPCALL (a copy of it). */
6110 extract_compcall_passed_object (gfc_expr
* e
)
6114 if (e
->expr_type
== EXPR_UNKNOWN
)
6116 gfc_error ("Error in typebound call at %L",
6121 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6123 if (e
->value
.compcall
.base_object
)
6124 po
= gfc_copy_expr (e
->value
.compcall
.base_object
);
6127 po
= gfc_get_expr ();
6128 po
->expr_type
= EXPR_VARIABLE
;
6129 po
->symtree
= e
->symtree
;
6130 po
->ref
= gfc_copy_ref (e
->ref
);
6131 po
->where
= e
->where
;
6134 if (!gfc_resolve_expr (po
))
6141 /* Update the arglist of an EXPR_COMPCALL expression to include the
6145 update_compcall_arglist (gfc_expr
* e
)
6148 gfc_typebound_proc
* tbp
;
6150 tbp
= e
->value
.compcall
.tbp
;
6155 po
= extract_compcall_passed_object (e
);
6159 if (tbp
->nopass
|| e
->value
.compcall
.ignore_pass
)
6165 if (tbp
->pass_arg_num
<= 0)
6168 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6176 /* Extract the passed object from a PPC call (a copy of it). */
6179 extract_ppc_passed_object (gfc_expr
*e
)
6184 po
= gfc_get_expr ();
6185 po
->expr_type
= EXPR_VARIABLE
;
6186 po
->symtree
= e
->symtree
;
6187 po
->ref
= gfc_copy_ref (e
->ref
);
6188 po
->where
= e
->where
;
6190 /* Remove PPC reference. */
6192 while ((*ref
)->next
)
6193 ref
= &(*ref
)->next
;
6194 gfc_free_ref_list (*ref
);
6197 if (!gfc_resolve_expr (po
))
6204 /* Update the actual arglist of a procedure pointer component to include the
6208 update_ppc_arglist (gfc_expr
* e
)
6212 gfc_typebound_proc
* tb
;
6214 ppc
= gfc_get_proc_ptr_comp (e
);
6222 else if (tb
->nopass
)
6225 po
= extract_ppc_passed_object (e
);
6232 gfc_error ("Passed-object at %L must be scalar", &e
->where
);
6237 if (po
->ts
.type
== BT_DERIVED
&& po
->ts
.u
.derived
->attr
.abstract
)
6239 gfc_error ("Base object for procedure-pointer component call at %L is of"
6240 " ABSTRACT type %qs", &e
->where
, po
->ts
.u
.derived
->name
);
6244 gcc_assert (tb
->pass_arg_num
> 0);
6245 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6253 /* Check that the object a TBP is called on is valid, i.e. it must not be
6254 of ABSTRACT type (as in subobject%abstract_parent%tbp()). */
6257 check_typebound_baseobject (gfc_expr
* e
)
6260 bool return_value
= false;
6262 base
= extract_compcall_passed_object (e
);
6266 if (base
->ts
.type
!= BT_DERIVED
&& base
->ts
.type
!= BT_CLASS
)
6268 gfc_error ("Error in typebound call at %L", &e
->where
);
6272 if (base
->ts
.type
== BT_CLASS
&& !gfc_expr_attr (base
).class_ok
)
6276 if (base
->ts
.type
== BT_DERIVED
&& base
->ts
.u
.derived
->attr
.abstract
)
6278 gfc_error ("Base object for type-bound procedure call at %L is of"
6279 " ABSTRACT type %qs", &e
->where
, base
->ts
.u
.derived
->name
);
6283 /* F08:C1230. If the procedure called is NOPASS,
6284 the base object must be scalar. */
6285 if (e
->value
.compcall
.tbp
->nopass
&& base
->rank
!= 0)
6287 gfc_error ("Base object for NOPASS type-bound procedure call at %L must"
6288 " be scalar", &e
->where
);
6292 return_value
= true;
6295 gfc_free_expr (base
);
6296 return return_value
;
6300 /* Resolve a call to a type-bound procedure, either function or subroutine,
6301 statically from the data in an EXPR_COMPCALL expression. The adapted
6302 arglist and the target-procedure symtree are returned. */
6305 resolve_typebound_static (gfc_expr
* e
, gfc_symtree
** target
,
6306 gfc_actual_arglist
** actual
)
6308 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6309 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6311 /* Update the actual arglist for PASS. */
6312 if (!update_compcall_arglist (e
))
6315 *actual
= e
->value
.compcall
.actual
;
6316 *target
= e
->value
.compcall
.tbp
->u
.specific
;
6318 gfc_free_ref_list (e
->ref
);
6320 e
->value
.compcall
.actual
= NULL
;
6322 /* If we find a deferred typebound procedure, check for derived types
6323 that an overriding typebound procedure has not been missed. */
6324 if (e
->value
.compcall
.name
6325 && !e
->value
.compcall
.tbp
->non_overridable
6326 && e
->value
.compcall
.base_object
6327 && e
->value
.compcall
.base_object
->ts
.type
== BT_DERIVED
)
6330 gfc_symbol
*derived
;
6332 /* Use the derived type of the base_object. */
6333 derived
= e
->value
.compcall
.base_object
->ts
.u
.derived
;
6336 /* If necessary, go through the inheritance chain. */
6337 while (!st
&& derived
)
6339 /* Look for the typebound procedure 'name'. */
6340 if (derived
->f2k_derived
&& derived
->f2k_derived
->tb_sym_root
)
6341 st
= gfc_find_symtree (derived
->f2k_derived
->tb_sym_root
,
6342 e
->value
.compcall
.name
);
6344 derived
= gfc_get_derived_super_type (derived
);
6347 /* Now find the specific name in the derived type namespace. */
6348 if (st
&& st
->n
.tb
&& st
->n
.tb
->u
.specific
)
6349 gfc_find_sym_tree (st
->n
.tb
->u
.specific
->name
,
6350 derived
->ns
, 1, &st
);
6358 /* Get the ultimate declared type from an expression. In addition,
6359 return the last class/derived type reference and the copy of the
6360 reference list. If check_types is set true, derived types are
6361 identified as well as class references. */
6363 get_declared_from_expr (gfc_ref
**class_ref
, gfc_ref
**new_ref
,
6364 gfc_expr
*e
, bool check_types
)
6366 gfc_symbol
*declared
;
6373 *new_ref
= gfc_copy_ref (e
->ref
);
6375 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
6377 if (ref
->type
!= REF_COMPONENT
)
6380 if ((ref
->u
.c
.component
->ts
.type
== BT_CLASS
6381 || (check_types
&& gfc_bt_struct (ref
->u
.c
.component
->ts
.type
)))
6382 && ref
->u
.c
.component
->attr
.flavor
!= FL_PROCEDURE
)
6384 declared
= ref
->u
.c
.component
->ts
.u
.derived
;
6390 if (declared
== NULL
)
6391 declared
= e
->symtree
->n
.sym
->ts
.u
.derived
;
6397 /* Given an EXPR_COMPCALL calling a GENERIC typebound procedure, figure out
6398 which of the specific bindings (if any) matches the arglist and transform
6399 the expression into a call of that binding. */
6402 resolve_typebound_generic_call (gfc_expr
* e
, const char **name
)
6404 gfc_typebound_proc
* genproc
;
6405 const char* genname
;
6407 gfc_symbol
*derived
;
6409 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6410 genname
= e
->value
.compcall
.name
;
6411 genproc
= e
->value
.compcall
.tbp
;
6413 if (!genproc
->is_generic
)
6416 /* Try the bindings on this type and in the inheritance hierarchy. */
6417 for (; genproc
; genproc
= genproc
->overridden
)
6421 gcc_assert (genproc
->is_generic
);
6422 for (g
= genproc
->u
.generic
; g
; g
= g
->next
)
6425 gfc_actual_arglist
* args
;
6428 gcc_assert (g
->specific
);
6430 if (g
->specific
->error
)
6433 target
= g
->specific
->u
.specific
->n
.sym
;
6435 /* Get the right arglist by handling PASS/NOPASS. */
6436 args
= gfc_copy_actual_arglist (e
->value
.compcall
.actual
);
6437 if (!g
->specific
->nopass
)
6440 po
= extract_compcall_passed_object (e
);
6443 gfc_free_actual_arglist (args
);
6447 gcc_assert (g
->specific
->pass_arg_num
> 0);
6448 gcc_assert (!g
->specific
->error
);
6449 args
= update_arglist_pass (args
, po
, g
->specific
->pass_arg_num
,
6450 g
->specific
->pass_arg
);
6452 resolve_actual_arglist (args
, target
->attr
.proc
,
6453 is_external_proc (target
)
6454 && gfc_sym_get_dummy_args (target
) == NULL
);
6456 /* Check if this arglist matches the formal. */
6457 matches
= gfc_arglist_matches_symbol (&args
, target
);
6459 /* Clean up and break out of the loop if we've found it. */
6460 gfc_free_actual_arglist (args
);
6463 e
->value
.compcall
.tbp
= g
->specific
;
6464 genname
= g
->specific_st
->name
;
6465 /* Pass along the name for CLASS methods, where the vtab
6466 procedure pointer component has to be referenced. */
6474 /* Nothing matching found! */
6475 gfc_error ("Found no matching specific binding for the call to the GENERIC"
6476 " %qs at %L", genname
, &e
->where
);
6480 /* Make sure that we have the right specific instance for the name. */
6481 derived
= get_declared_from_expr (NULL
, NULL
, e
, true);
6483 st
= gfc_find_typebound_proc (derived
, NULL
, genname
, true, &e
->where
);
6485 e
->value
.compcall
.tbp
= st
->n
.tb
;
6491 /* Resolve a call to a type-bound subroutine. */
6494 resolve_typebound_call (gfc_code
* c
, const char **name
, bool *overridable
)
6496 gfc_actual_arglist
* newactual
;
6497 gfc_symtree
* target
;
6499 /* Check that's really a SUBROUTINE. */
6500 if (!c
->expr1
->value
.compcall
.tbp
->subroutine
)
6502 if (!c
->expr1
->value
.compcall
.tbp
->is_generic
6503 && c
->expr1
->value
.compcall
.tbp
->u
.specific
6504 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
6505 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
->attr
.subroutine
)
6506 c
->expr1
->value
.compcall
.tbp
->subroutine
= 1;
6509 gfc_error ("%qs at %L should be a SUBROUTINE",
6510 c
->expr1
->value
.compcall
.name
, &c
->loc
);
6515 if (!check_typebound_baseobject (c
->expr1
))
6518 /* Pass along the name for CLASS methods, where the vtab
6519 procedure pointer component has to be referenced. */
6521 *name
= c
->expr1
->value
.compcall
.name
;
6523 if (!resolve_typebound_generic_call (c
->expr1
, name
))
6526 /* Pass along the NON_OVERRIDABLE attribute of the specific TBP. */
6528 *overridable
= !c
->expr1
->value
.compcall
.tbp
->non_overridable
;
6530 /* Transform into an ordinary EXEC_CALL for now. */
6532 if (!resolve_typebound_static (c
->expr1
, &target
, &newactual
))
6535 c
->ext
.actual
= newactual
;
6536 c
->symtree
= target
;
6537 c
->op
= (c
->expr1
->value
.compcall
.assign
? EXEC_ASSIGN_CALL
: EXEC_CALL
);
6539 gcc_assert (!c
->expr1
->ref
&& !c
->expr1
->value
.compcall
.actual
);
6541 gfc_free_expr (c
->expr1
);
6542 c
->expr1
= gfc_get_expr ();
6543 c
->expr1
->expr_type
= EXPR_FUNCTION
;
6544 c
->expr1
->symtree
= target
;
6545 c
->expr1
->where
= c
->loc
;
6547 return resolve_call (c
);
6551 /* Resolve a component-call expression. */
6553 resolve_compcall (gfc_expr
* e
, const char **name
)
6555 gfc_actual_arglist
* newactual
;
6556 gfc_symtree
* target
;
6558 /* Check that's really a FUNCTION. */
6559 if (!e
->value
.compcall
.tbp
->function
)
6561 gfc_error ("%qs at %L should be a FUNCTION",
6562 e
->value
.compcall
.name
, &e
->where
);
6567 /* These must not be assign-calls! */
6568 gcc_assert (!e
->value
.compcall
.assign
);
6570 if (!check_typebound_baseobject (e
))
6573 /* Pass along the name for CLASS methods, where the vtab
6574 procedure pointer component has to be referenced. */
6576 *name
= e
->value
.compcall
.name
;
6578 if (!resolve_typebound_generic_call (e
, name
))
6580 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6582 /* Take the rank from the function's symbol. */
6583 if (e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
)
6584 e
->rank
= e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
->rank
;
6586 /* For now, we simply transform it into an EXPR_FUNCTION call with the same
6587 arglist to the TBP's binding target. */
6589 if (!resolve_typebound_static (e
, &target
, &newactual
))
6592 e
->value
.function
.actual
= newactual
;
6593 e
->value
.function
.name
= NULL
;
6594 e
->value
.function
.esym
= target
->n
.sym
;
6595 e
->value
.function
.isym
= NULL
;
6596 e
->symtree
= target
;
6597 e
->ts
= target
->n
.sym
->ts
;
6598 e
->expr_type
= EXPR_FUNCTION
;
6600 /* Resolution is not necessary if this is a class subroutine; this
6601 function only has to identify the specific proc. Resolution of
6602 the call will be done next in resolve_typebound_call. */
6603 return gfc_resolve_expr (e
);
6607 static bool resolve_fl_derived (gfc_symbol
*sym
);
6610 /* Resolve a typebound function, or 'method'. First separate all
6611 the non-CLASS references by calling resolve_compcall directly. */
6614 resolve_typebound_function (gfc_expr
* e
)
6616 gfc_symbol
*declared
;
6628 /* Deal with typebound operators for CLASS objects. */
6629 expr
= e
->value
.compcall
.base_object
;
6630 overridable
= !e
->value
.compcall
.tbp
->non_overridable
;
6631 if (expr
&& expr
->ts
.type
== BT_CLASS
&& e
->value
.compcall
.name
)
6633 /* Since the typebound operators are generic, we have to ensure
6634 that any delays in resolution are corrected and that the vtab
6637 declared
= ts
.u
.derived
;
6638 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6639 if (c
->ts
.u
.derived
== NULL
)
6640 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6642 if (!resolve_compcall (e
, &name
))
6645 /* Use the generic name if it is there. */
6646 name
= name
? name
: e
->value
.function
.esym
->name
;
6647 e
->symtree
= expr
->symtree
;
6648 e
->ref
= gfc_copy_ref (expr
->ref
);
6649 get_declared_from_expr (&class_ref
, NULL
, e
, false);
6651 /* Trim away the extraneous references that emerge from nested
6652 use of interface.c (extend_expr). */
6653 if (class_ref
&& class_ref
->next
)
6655 gfc_free_ref_list (class_ref
->next
);
6656 class_ref
->next
= NULL
;
6658 else if (e
->ref
&& !class_ref
&& expr
->ts
.type
!= BT_CLASS
)
6660 gfc_free_ref_list (e
->ref
);
6664 gfc_add_vptr_component (e
);
6665 gfc_add_component_ref (e
, name
);
6666 e
->value
.function
.esym
= NULL
;
6667 if (expr
->expr_type
!= EXPR_VARIABLE
)
6668 e
->base_expr
= expr
;
6673 return resolve_compcall (e
, NULL
);
6675 if (!gfc_resolve_ref (e
))
6678 /* Get the CLASS declared type. */
6679 declared
= get_declared_from_expr (&class_ref
, &new_ref
, e
, true);
6681 if (!resolve_fl_derived (declared
))
6684 /* Weed out cases of the ultimate component being a derived type. */
6685 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6686 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6688 gfc_free_ref_list (new_ref
);
6689 return resolve_compcall (e
, NULL
);
6692 c
= gfc_find_component (declared
, "_data", true, true, NULL
);
6694 /* Treat the call as if it is a typebound procedure, in order to roll
6695 out the correct name for the specific function. */
6696 if (!resolve_compcall (e
, &name
))
6698 gfc_free_ref_list (new_ref
);
6705 /* Convert the expression to a procedure pointer component call. */
6706 e
->value
.function
.esym
= NULL
;
6712 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6713 gfc_add_vptr_component (e
);
6714 gfc_add_component_ref (e
, name
);
6716 /* Recover the typespec for the expression. This is really only
6717 necessary for generic procedures, where the additional call
6718 to gfc_add_component_ref seems to throw the collection of the
6719 correct typespec. */
6723 gfc_free_ref_list (new_ref
);
6728 /* Resolve a typebound subroutine, or 'method'. First separate all
6729 the non-CLASS references by calling resolve_typebound_call
6733 resolve_typebound_subroutine (gfc_code
*code
)
6735 gfc_symbol
*declared
;
6745 st
= code
->expr1
->symtree
;
6747 /* Deal with typebound operators for CLASS objects. */
6748 expr
= code
->expr1
->value
.compcall
.base_object
;
6749 overridable
= !code
->expr1
->value
.compcall
.tbp
->non_overridable
;
6750 if (expr
&& expr
->ts
.type
== BT_CLASS
&& code
->expr1
->value
.compcall
.name
)
6752 /* If the base_object is not a variable, the corresponding actual
6753 argument expression must be stored in e->base_expression so
6754 that the corresponding tree temporary can be used as the base
6755 object in gfc_conv_procedure_call. */
6756 if (expr
->expr_type
!= EXPR_VARIABLE
)
6758 gfc_actual_arglist
*args
;
6760 args
= code
->expr1
->value
.function
.actual
;
6761 for (; args
; args
= args
->next
)
6762 if (expr
== args
->expr
)
6766 /* Since the typebound operators are generic, we have to ensure
6767 that any delays in resolution are corrected and that the vtab
6769 declared
= expr
->ts
.u
.derived
;
6770 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6771 if (c
->ts
.u
.derived
== NULL
)
6772 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6774 if (!resolve_typebound_call (code
, &name
, NULL
))
6777 /* Use the generic name if it is there. */
6778 name
= name
? name
: code
->expr1
->value
.function
.esym
->name
;
6779 code
->expr1
->symtree
= expr
->symtree
;
6780 code
->expr1
->ref
= gfc_copy_ref (expr
->ref
);
6782 /* Trim away the extraneous references that emerge from nested
6783 use of interface.c (extend_expr). */
6784 get_declared_from_expr (&class_ref
, NULL
, code
->expr1
, false);
6785 if (class_ref
&& class_ref
->next
)
6787 gfc_free_ref_list (class_ref
->next
);
6788 class_ref
->next
= NULL
;
6790 else if (code
->expr1
->ref
&& !class_ref
)
6792 gfc_free_ref_list (code
->expr1
->ref
);
6793 code
->expr1
->ref
= NULL
;
6796 /* Now use the procedure in the vtable. */
6797 gfc_add_vptr_component (code
->expr1
);
6798 gfc_add_component_ref (code
->expr1
, name
);
6799 code
->expr1
->value
.function
.esym
= NULL
;
6800 if (expr
->expr_type
!= EXPR_VARIABLE
)
6801 code
->expr1
->base_expr
= expr
;
6806 return resolve_typebound_call (code
, NULL
, NULL
);
6808 if (!gfc_resolve_ref (code
->expr1
))
6811 /* Get the CLASS declared type. */
6812 get_declared_from_expr (&class_ref
, &new_ref
, code
->expr1
, true);
6814 /* Weed out cases of the ultimate component being a derived type. */
6815 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6816 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6818 gfc_free_ref_list (new_ref
);
6819 return resolve_typebound_call (code
, NULL
, NULL
);
6822 if (!resolve_typebound_call (code
, &name
, &overridable
))
6824 gfc_free_ref_list (new_ref
);
6827 ts
= code
->expr1
->ts
;
6831 /* Convert the expression to a procedure pointer component call. */
6832 code
->expr1
->value
.function
.esym
= NULL
;
6833 code
->expr1
->symtree
= st
;
6836 code
->expr1
->ref
= new_ref
;
6838 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6839 gfc_add_vptr_component (code
->expr1
);
6840 gfc_add_component_ref (code
->expr1
, name
);
6842 /* Recover the typespec for the expression. This is really only
6843 necessary for generic procedures, where the additional call
6844 to gfc_add_component_ref seems to throw the collection of the
6845 correct typespec. */
6846 code
->expr1
->ts
= ts
;
6849 gfc_free_ref_list (new_ref
);
6855 /* Resolve a CALL to a Procedure Pointer Component (Subroutine). */
6858 resolve_ppc_call (gfc_code
* c
)
6860 gfc_component
*comp
;
6862 comp
= gfc_get_proc_ptr_comp (c
->expr1
);
6863 gcc_assert (comp
!= NULL
);
6865 c
->resolved_sym
= c
->expr1
->symtree
->n
.sym
;
6866 c
->expr1
->expr_type
= EXPR_VARIABLE
;
6868 if (!comp
->attr
.subroutine
)
6869 gfc_add_subroutine (&comp
->attr
, comp
->name
, &c
->expr1
->where
);
6871 if (!gfc_resolve_ref (c
->expr1
))
6874 if (!update_ppc_arglist (c
->expr1
))
6877 c
->ext
.actual
= c
->expr1
->value
.compcall
.actual
;
6879 if (!resolve_actual_arglist (c
->ext
.actual
, comp
->attr
.proc
,
6880 !(comp
->ts
.interface
6881 && comp
->ts
.interface
->formal
)))
6884 if (!pure_subroutine (comp
->ts
.interface
, comp
->name
, &c
->expr1
->where
))
6887 gfc_ppc_use (comp
, &c
->expr1
->value
.compcall
.actual
, &c
->expr1
->where
);
6893 /* Resolve a Function Call to a Procedure Pointer Component (Function). */
6896 resolve_expr_ppc (gfc_expr
* e
)
6898 gfc_component
*comp
;
6900 comp
= gfc_get_proc_ptr_comp (e
);
6901 gcc_assert (comp
!= NULL
);
6903 /* Convert to EXPR_FUNCTION. */
6904 e
->expr_type
= EXPR_FUNCTION
;
6905 e
->value
.function
.isym
= NULL
;
6906 e
->value
.function
.actual
= e
->value
.compcall
.actual
;
6908 if (comp
->as
!= NULL
)
6909 e
->rank
= comp
->as
->rank
;
6911 if (!comp
->attr
.function
)
6912 gfc_add_function (&comp
->attr
, comp
->name
, &e
->where
);
6914 if (!gfc_resolve_ref (e
))
6917 if (!resolve_actual_arglist (e
->value
.function
.actual
, comp
->attr
.proc
,
6918 !(comp
->ts
.interface
6919 && comp
->ts
.interface
->formal
)))
6922 if (!update_ppc_arglist (e
))
6925 if (!check_pure_function(e
))
6928 gfc_ppc_use (comp
, &e
->value
.compcall
.actual
, &e
->where
);
6935 gfc_is_expandable_expr (gfc_expr
*e
)
6937 gfc_constructor
*con
;
6939 if (e
->expr_type
== EXPR_ARRAY
)
6941 /* Traverse the constructor looking for variables that are flavor
6942 parameter. Parameters must be expanded since they are fully used at
6944 con
= gfc_constructor_first (e
->value
.constructor
);
6945 for (; con
; con
= gfc_constructor_next (con
))
6947 if (con
->expr
->expr_type
== EXPR_VARIABLE
6948 && con
->expr
->symtree
6949 && (con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
6950 || con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_VARIABLE
))
6952 if (con
->expr
->expr_type
== EXPR_ARRAY
6953 && gfc_is_expandable_expr (con
->expr
))
6962 /* Sometimes variables in specification expressions of the result
6963 of module procedures in submodules wind up not being the 'real'
6964 dummy. Find this, if possible, in the namespace of the first
6968 fixup_unique_dummy (gfc_expr
*e
)
6970 gfc_symtree
*st
= NULL
;
6971 gfc_symbol
*s
= NULL
;
6973 if (e
->symtree
->n
.sym
->ns
->proc_name
6974 && e
->symtree
->n
.sym
->ns
->proc_name
->formal
)
6975 s
= e
->symtree
->n
.sym
->ns
->proc_name
->formal
->sym
;
6978 st
= gfc_find_symtree (s
->ns
->sym_root
, e
->symtree
->n
.sym
->name
);
6981 && st
->n
.sym
!= NULL
6982 && st
->n
.sym
->attr
.dummy
)
6986 /* Resolve an expression. That is, make sure that types of operands agree
6987 with their operators, intrinsic operators are converted to function calls
6988 for overloaded types and unresolved function references are resolved. */
6991 gfc_resolve_expr (gfc_expr
*e
)
6994 bool inquiry_save
, actual_arg_save
, first_actual_arg_save
;
6996 if (e
== NULL
|| e
->do_not_resolve_again
)
6999 /* inquiry_argument only applies to variables. */
7000 inquiry_save
= inquiry_argument
;
7001 actual_arg_save
= actual_arg
;
7002 first_actual_arg_save
= first_actual_arg
;
7004 if (e
->expr_type
!= EXPR_VARIABLE
)
7006 inquiry_argument
= false;
7008 first_actual_arg
= false;
7010 else if (e
->symtree
!= NULL
7011 && *e
->symtree
->name
== '@'
7012 && e
->symtree
->n
.sym
->attr
.dummy
)
7014 /* Deal with submodule specification expressions that are not
7015 found to be referenced in module.c(read_cleanup). */
7016 fixup_unique_dummy (e
);
7019 switch (e
->expr_type
)
7022 t
= resolve_operator (e
);
7028 if (check_host_association (e
))
7029 t
= resolve_function (e
);
7031 t
= resolve_variable (e
);
7033 if (e
->ts
.type
== BT_CHARACTER
&& e
->ts
.u
.cl
== NULL
&& e
->ref
7034 && e
->ref
->type
!= REF_SUBSTRING
)
7035 gfc_resolve_substring_charlen (e
);
7040 t
= resolve_typebound_function (e
);
7043 case EXPR_SUBSTRING
:
7044 t
= gfc_resolve_ref (e
);
7053 t
= resolve_expr_ppc (e
);
7058 if (!gfc_resolve_ref (e
))
7061 t
= gfc_resolve_array_constructor (e
);
7062 /* Also try to expand a constructor. */
7065 gfc_expression_rank (e
);
7066 if (gfc_is_constant_expr (e
) || gfc_is_expandable_expr (e
))
7067 gfc_expand_constructor (e
, false);
7070 /* This provides the opportunity for the length of constructors with
7071 character valued function elements to propagate the string length
7072 to the expression. */
7073 if (t
&& e
->ts
.type
== BT_CHARACTER
)
7075 /* For efficiency, we call gfc_expand_constructor for BT_CHARACTER
7076 here rather then add a duplicate test for it above. */
7077 gfc_expand_constructor (e
, false);
7078 t
= gfc_resolve_character_array_constructor (e
);
7083 case EXPR_STRUCTURE
:
7084 t
= gfc_resolve_ref (e
);
7088 t
= resolve_structure_cons (e
, 0);
7092 t
= gfc_simplify_expr (e
, 0);
7096 gfc_internal_error ("gfc_resolve_expr(): Bad expression type");
7099 if (e
->ts
.type
== BT_CHARACTER
&& t
&& !e
->ts
.u
.cl
)
7102 inquiry_argument
= inquiry_save
;
7103 actual_arg
= actual_arg_save
;
7104 first_actual_arg
= first_actual_arg_save
;
7106 /* For some reason, resolving these expressions a second time mangles
7107 the typespec of the expression itself. */
7108 if (t
&& e
->expr_type
== EXPR_VARIABLE
7109 && e
->symtree
->n
.sym
->attr
.select_rank_temporary
7110 && UNLIMITED_POLY (e
->symtree
->n
.sym
))
7111 e
->do_not_resolve_again
= 1;
7117 /* Resolve an expression from an iterator. They must be scalar and have
7118 INTEGER or (optionally) REAL type. */
7121 gfc_resolve_iterator_expr (gfc_expr
*expr
, bool real_ok
,
7122 const char *name_msgid
)
7124 if (!gfc_resolve_expr (expr
))
7127 if (expr
->rank
!= 0)
7129 gfc_error ("%s at %L must be a scalar", _(name_msgid
), &expr
->where
);
7133 if (expr
->ts
.type
!= BT_INTEGER
)
7135 if (expr
->ts
.type
== BT_REAL
)
7138 return gfc_notify_std (GFC_STD_F95_DEL
,
7139 "%s at %L must be integer",
7140 _(name_msgid
), &expr
->where
);
7143 gfc_error ("%s at %L must be INTEGER", _(name_msgid
),
7150 gfc_error ("%s at %L must be INTEGER", _(name_msgid
), &expr
->where
);
7158 /* Resolve the expressions in an iterator structure. If REAL_OK is
7159 false allow only INTEGER type iterators, otherwise allow REAL types.
7160 Set own_scope to true for ac-implied-do and data-implied-do as those
7161 have a separate scope such that, e.g., a INTENT(IN) doesn't apply. */
7164 gfc_resolve_iterator (gfc_iterator
*iter
, bool real_ok
, bool own_scope
)
7166 if (!gfc_resolve_iterator_expr (iter
->var
, real_ok
, "Loop variable"))
7169 if (!gfc_check_vardef_context (iter
->var
, false, false, own_scope
,
7170 _("iterator variable")))
7173 if (!gfc_resolve_iterator_expr (iter
->start
, real_ok
,
7174 "Start expression in DO loop"))
7177 if (!gfc_resolve_iterator_expr (iter
->end
, real_ok
,
7178 "End expression in DO loop"))
7181 if (!gfc_resolve_iterator_expr (iter
->step
, real_ok
,
7182 "Step expression in DO loop"))
7185 /* Convert start, end, and step to the same type as var. */
7186 if (iter
->start
->ts
.kind
!= iter
->var
->ts
.kind
7187 || iter
->start
->ts
.type
!= iter
->var
->ts
.type
)
7188 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7190 if (iter
->end
->ts
.kind
!= iter
->var
->ts
.kind
7191 || iter
->end
->ts
.type
!= iter
->var
->ts
.type
)
7192 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7194 if (iter
->step
->ts
.kind
!= iter
->var
->ts
.kind
7195 || iter
->step
->ts
.type
!= iter
->var
->ts
.type
)
7196 gfc_convert_type (iter
->step
, &iter
->var
->ts
, 1);
7198 if (iter
->step
->expr_type
== EXPR_CONSTANT
)
7200 if ((iter
->step
->ts
.type
== BT_INTEGER
7201 && mpz_cmp_ui (iter
->step
->value
.integer
, 0) == 0)
7202 || (iter
->step
->ts
.type
== BT_REAL
7203 && mpfr_sgn (iter
->step
->value
.real
) == 0))
7205 gfc_error ("Step expression in DO loop at %L cannot be zero",
7206 &iter
->step
->where
);
7211 if (iter
->start
->expr_type
== EXPR_CONSTANT
7212 && iter
->end
->expr_type
== EXPR_CONSTANT
7213 && iter
->step
->expr_type
== EXPR_CONSTANT
)
7216 if (iter
->start
->ts
.type
== BT_INTEGER
)
7218 sgn
= mpz_cmp_ui (iter
->step
->value
.integer
, 0);
7219 cmp
= mpz_cmp (iter
->end
->value
.integer
, iter
->start
->value
.integer
);
7223 sgn
= mpfr_sgn (iter
->step
->value
.real
);
7224 cmp
= mpfr_cmp (iter
->end
->value
.real
, iter
->start
->value
.real
);
7226 if (warn_zerotrip
&& ((sgn
> 0 && cmp
< 0) || (sgn
< 0 && cmp
> 0)))
7227 gfc_warning (OPT_Wzerotrip
,
7228 "DO loop at %L will be executed zero times",
7229 &iter
->step
->where
);
7232 if (iter
->end
->expr_type
== EXPR_CONSTANT
7233 && iter
->end
->ts
.type
== BT_INTEGER
7234 && iter
->step
->expr_type
== EXPR_CONSTANT
7235 && iter
->step
->ts
.type
== BT_INTEGER
7236 && (mpz_cmp_si (iter
->step
->value
.integer
, -1L) == 0
7237 || mpz_cmp_si (iter
->step
->value
.integer
, 1L) == 0))
7239 bool is_step_positive
= mpz_cmp_ui (iter
->step
->value
.integer
, 1) == 0;
7240 int k
= gfc_validate_kind (BT_INTEGER
, iter
->end
->ts
.kind
, false);
7242 if (is_step_positive
7243 && mpz_cmp (iter
->end
->value
.integer
, gfc_integer_kinds
[k
].huge
) == 0)
7244 gfc_warning (OPT_Wundefined_do_loop
,
7245 "DO loop at %L is undefined as it overflows",
7246 &iter
->step
->where
);
7247 else if (!is_step_positive
7248 && mpz_cmp (iter
->end
->value
.integer
,
7249 gfc_integer_kinds
[k
].min_int
) == 0)
7250 gfc_warning (OPT_Wundefined_do_loop
,
7251 "DO loop at %L is undefined as it underflows",
7252 &iter
->step
->where
);
7259 /* Traversal function for find_forall_index. f == 2 signals that
7260 that variable itself is not to be checked - only the references. */
7263 forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int *f
)
7265 if (expr
->expr_type
!= EXPR_VARIABLE
)
7268 /* A scalar assignment */
7269 if (!expr
->ref
|| *f
== 1)
7271 if (expr
->symtree
->n
.sym
== sym
)
7283 /* Check whether the FORALL index appears in the expression or not.
7284 Returns true if SYM is found in EXPR. */
7287 find_forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int f
)
7289 if (gfc_traverse_expr (expr
, sym
, forall_index
, f
))
7296 /* Resolve a list of FORALL iterators. The FORALL index-name is constrained
7297 to be a scalar INTEGER variable. The subscripts and stride are scalar
7298 INTEGERs, and if stride is a constant it must be nonzero.
7299 Furthermore "A subscript or stride in a forall-triplet-spec shall
7300 not contain a reference to any index-name in the
7301 forall-triplet-spec-list in which it appears." (7.5.4.1) */
7304 resolve_forall_iterators (gfc_forall_iterator
*it
)
7306 gfc_forall_iterator
*iter
, *iter2
;
7308 for (iter
= it
; iter
; iter
= iter
->next
)
7310 if (gfc_resolve_expr (iter
->var
)
7311 && (iter
->var
->ts
.type
!= BT_INTEGER
|| iter
->var
->rank
!= 0))
7312 gfc_error ("FORALL index-name at %L must be a scalar INTEGER",
7315 if (gfc_resolve_expr (iter
->start
)
7316 && (iter
->start
->ts
.type
!= BT_INTEGER
|| iter
->start
->rank
!= 0))
7317 gfc_error ("FORALL start expression at %L must be a scalar INTEGER",
7318 &iter
->start
->where
);
7319 if (iter
->var
->ts
.kind
!= iter
->start
->ts
.kind
)
7320 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7322 if (gfc_resolve_expr (iter
->end
)
7323 && (iter
->end
->ts
.type
!= BT_INTEGER
|| iter
->end
->rank
!= 0))
7324 gfc_error ("FORALL end expression at %L must be a scalar INTEGER",
7326 if (iter
->var
->ts
.kind
!= iter
->end
->ts
.kind
)
7327 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7329 if (gfc_resolve_expr (iter
->stride
))
7331 if (iter
->stride
->ts
.type
!= BT_INTEGER
|| iter
->stride
->rank
!= 0)
7332 gfc_error ("FORALL stride expression at %L must be a scalar %s",
7333 &iter
->stride
->where
, "INTEGER");
7335 if (iter
->stride
->expr_type
== EXPR_CONSTANT
7336 && mpz_cmp_ui (iter
->stride
->value
.integer
, 0) == 0)
7337 gfc_error ("FORALL stride expression at %L cannot be zero",
7338 &iter
->stride
->where
);
7340 if (iter
->var
->ts
.kind
!= iter
->stride
->ts
.kind
)
7341 gfc_convert_type (iter
->stride
, &iter
->var
->ts
, 1);
7344 for (iter
= it
; iter
; iter
= iter
->next
)
7345 for (iter2
= iter
; iter2
; iter2
= iter2
->next
)
7347 if (find_forall_index (iter2
->start
, iter
->var
->symtree
->n
.sym
, 0)
7348 || find_forall_index (iter2
->end
, iter
->var
->symtree
->n
.sym
, 0)
7349 || find_forall_index (iter2
->stride
, iter
->var
->symtree
->n
.sym
, 0))
7350 gfc_error ("FORALL index %qs may not appear in triplet "
7351 "specification at %L", iter
->var
->symtree
->name
,
7352 &iter2
->start
->where
);
7357 /* Given a pointer to a symbol that is a derived type, see if it's
7358 inaccessible, i.e. if it's defined in another module and the components are
7359 PRIVATE. The search is recursive if necessary. Returns zero if no
7360 inaccessible components are found, nonzero otherwise. */
7363 derived_inaccessible (gfc_symbol
*sym
)
7367 if (sym
->attr
.use_assoc
&& sym
->attr
.private_comp
)
7370 for (c
= sym
->components
; c
; c
= c
->next
)
7372 /* Prevent an infinite loop through this function. */
7373 if (c
->ts
.type
== BT_DERIVED
&& c
->attr
.pointer
7374 && sym
== c
->ts
.u
.derived
)
7377 if (c
->ts
.type
== BT_DERIVED
&& derived_inaccessible (c
->ts
.u
.derived
))
7385 /* Resolve the argument of a deallocate expression. The expression must be
7386 a pointer or a full array. */
7389 resolve_deallocate_expr (gfc_expr
*e
)
7391 symbol_attribute attr
;
7392 int allocatable
, pointer
;
7398 if (!gfc_resolve_expr (e
))
7401 if (e
->expr_type
!= EXPR_VARIABLE
)
7404 sym
= e
->symtree
->n
.sym
;
7405 unlimited
= UNLIMITED_POLY(sym
);
7407 if (sym
->ts
.type
== BT_CLASS
)
7409 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7410 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7414 allocatable
= sym
->attr
.allocatable
;
7415 pointer
= sym
->attr
.pointer
;
7417 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7422 if (ref
->u
.ar
.type
!= AR_FULL
7423 && !(ref
->u
.ar
.type
== AR_ELEMENT
&& ref
->u
.ar
.as
->rank
== 0
7424 && ref
->u
.ar
.codimen
&& gfc_ref_this_image (ref
)))
7429 c
= ref
->u
.c
.component
;
7430 if (c
->ts
.type
== BT_CLASS
)
7432 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7433 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7437 allocatable
= c
->attr
.allocatable
;
7438 pointer
= c
->attr
.pointer
;
7449 attr
= gfc_expr_attr (e
);
7451 if (allocatable
== 0 && attr
.pointer
== 0 && !unlimited
)
7454 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7460 if (gfc_is_coindexed (e
))
7462 gfc_error ("Coindexed allocatable object at %L", &e
->where
);
7467 && !gfc_check_vardef_context (e
, true, true, false,
7468 _("DEALLOCATE object")))
7470 if (!gfc_check_vardef_context (e
, false, true, false,
7471 _("DEALLOCATE object")))
7478 /* Returns true if the expression e contains a reference to the symbol sym. */
7480 sym_in_expr (gfc_expr
*e
, gfc_symbol
*sym
, int *f ATTRIBUTE_UNUSED
)
7482 if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
== sym
)
7489 gfc_find_sym_in_expr (gfc_symbol
*sym
, gfc_expr
*e
)
7491 return gfc_traverse_expr (e
, sym
, sym_in_expr
, 0);
7495 /* Given the expression node e for an allocatable/pointer of derived type to be
7496 allocated, get the expression node to be initialized afterwards (needed for
7497 derived types with default initializers, and derived types with allocatable
7498 components that need nullification.) */
7501 gfc_expr_to_initialize (gfc_expr
*e
)
7507 result
= gfc_copy_expr (e
);
7509 /* Change the last array reference from AR_ELEMENT to AR_FULL. */
7510 for (ref
= result
->ref
; ref
; ref
= ref
->next
)
7511 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
7513 if (ref
->u
.ar
.dimen
== 0
7514 && ref
->u
.ar
.as
&& ref
->u
.ar
.as
->corank
)
7517 ref
->u
.ar
.type
= AR_FULL
;
7519 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
7520 ref
->u
.ar
.start
[i
] = ref
->u
.ar
.end
[i
] = ref
->u
.ar
.stride
[i
] = NULL
;
7525 gfc_free_shape (&result
->shape
, result
->rank
);
7527 /* Recalculate rank, shape, etc. */
7528 gfc_resolve_expr (result
);
7533 /* If the last ref of an expression is an array ref, return a copy of the
7534 expression with that one removed. Otherwise, a copy of the original
7535 expression. This is used for allocate-expressions and pointer assignment
7536 LHS, where there may be an array specification that needs to be stripped
7537 off when using gfc_check_vardef_context. */
7540 remove_last_array_ref (gfc_expr
* e
)
7545 e2
= gfc_copy_expr (e
);
7546 for (r
= &e2
->ref
; *r
; r
= &(*r
)->next
)
7547 if ((*r
)->type
== REF_ARRAY
&& !(*r
)->next
)
7549 gfc_free_ref_list (*r
);
7558 /* Used in resolve_allocate_expr to check that a allocation-object and
7559 a source-expr are conformable. This does not catch all possible
7560 cases; in particular a runtime checking is needed. */
7563 conformable_arrays (gfc_expr
*e1
, gfc_expr
*e2
)
7566 for (tail
= e2
->ref
; tail
&& tail
->next
; tail
= tail
->next
);
7568 /* First compare rank. */
7569 if ((tail
&& (!tail
->u
.ar
.as
|| e1
->rank
!= tail
->u
.ar
.as
->rank
))
7570 || (!tail
&& e1
->rank
!= e2
->rank
))
7572 gfc_error ("Source-expr at %L must be scalar or have the "
7573 "same rank as the allocate-object at %L",
7574 &e1
->where
, &e2
->where
);
7585 for (i
= 0; i
< e1
->rank
; i
++)
7587 if (tail
->u
.ar
.start
[i
] == NULL
)
7590 if (tail
->u
.ar
.end
[i
])
7592 mpz_set (s
, tail
->u
.ar
.end
[i
]->value
.integer
);
7593 mpz_sub (s
, s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7594 mpz_add_ui (s
, s
, 1);
7598 mpz_set (s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7601 if (mpz_cmp (e1
->shape
[i
], s
) != 0)
7603 gfc_error ("Source-expr at %L and allocate-object at %L must "
7604 "have the same shape", &e1
->where
, &e2
->where
);
7617 /* Resolve the expression in an ALLOCATE statement, doing the additional
7618 checks to see whether the expression is OK or not. The expression must
7619 have a trailing array reference that gives the size of the array. */
7622 resolve_allocate_expr (gfc_expr
*e
, gfc_code
*code
, bool *array_alloc_wo_spec
)
7624 int i
, pointer
, allocatable
, dimension
, is_abstract
;
7628 symbol_attribute attr
;
7629 gfc_ref
*ref
, *ref2
;
7632 gfc_symbol
*sym
= NULL
;
7637 /* Mark the utmost array component as being in allocate to allow DIMEN_STAR
7638 checking of coarrays. */
7639 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7640 if (ref
->next
== NULL
)
7643 if (ref
&& ref
->type
== REF_ARRAY
)
7644 ref
->u
.ar
.in_allocate
= true;
7646 if (!gfc_resolve_expr (e
))
7649 /* Make sure the expression is allocatable or a pointer. If it is
7650 pointer, the next-to-last reference must be a pointer. */
7654 sym
= e
->symtree
->n
.sym
;
7656 /* Check whether ultimate component is abstract and CLASS. */
7659 /* Is the allocate-object unlimited polymorphic? */
7660 unlimited
= UNLIMITED_POLY(e
);
7662 if (e
->expr_type
!= EXPR_VARIABLE
)
7665 attr
= gfc_expr_attr (e
);
7666 pointer
= attr
.pointer
;
7667 dimension
= attr
.dimension
;
7668 codimension
= attr
.codimension
;
7672 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
))
7674 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7675 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7676 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
7677 codimension
= CLASS_DATA (sym
)->attr
.codimension
;
7678 is_abstract
= CLASS_DATA (sym
)->attr
.abstract
;
7682 allocatable
= sym
->attr
.allocatable
;
7683 pointer
= sym
->attr
.pointer
;
7684 dimension
= sym
->attr
.dimension
;
7685 codimension
= sym
->attr
.codimension
;
7690 for (ref
= e
->ref
; ref
; ref2
= ref
, ref
= ref
->next
)
7695 if (ref
->u
.ar
.codimen
> 0)
7698 for (n
= ref
->u
.ar
.dimen
;
7699 n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
7700 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_THIS_IMAGE
)
7707 if (ref
->next
!= NULL
)
7715 gfc_error ("Coindexed allocatable object at %L",
7720 c
= ref
->u
.c
.component
;
7721 if (c
->ts
.type
== BT_CLASS
)
7723 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7724 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7725 dimension
= CLASS_DATA (c
)->attr
.dimension
;
7726 codimension
= CLASS_DATA (c
)->attr
.codimension
;
7727 is_abstract
= CLASS_DATA (c
)->attr
.abstract
;
7731 allocatable
= c
->attr
.allocatable
;
7732 pointer
= c
->attr
.pointer
;
7733 dimension
= c
->attr
.dimension
;
7734 codimension
= c
->attr
.codimension
;
7735 is_abstract
= c
->attr
.abstract
;
7748 /* Check for F08:C628. */
7749 if (allocatable
== 0 && pointer
== 0 && !unlimited
)
7751 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7756 /* Some checks for the SOURCE tag. */
7759 /* Check F03:C631. */
7760 if (!gfc_type_compatible (&e
->ts
, &code
->expr3
->ts
))
7762 gfc_error ("Type of entity at %L is type incompatible with "
7763 "source-expr at %L", &e
->where
, &code
->expr3
->where
);
7767 /* Check F03:C632 and restriction following Note 6.18. */
7768 if (code
->expr3
->rank
> 0 && !conformable_arrays (code
->expr3
, e
))
7771 /* Check F03:C633. */
7772 if (code
->expr3
->ts
.kind
!= e
->ts
.kind
&& !unlimited
)
7774 gfc_error ("The allocate-object at %L and the source-expr at %L "
7775 "shall have the same kind type parameter",
7776 &e
->where
, &code
->expr3
->where
);
7780 /* Check F2008, C642. */
7781 if (code
->expr3
->ts
.type
== BT_DERIVED
7782 && ((codimension
&& gfc_expr_attr (code
->expr3
).lock_comp
)
7783 || (code
->expr3
->ts
.u
.derived
->from_intmod
7784 == INTMOD_ISO_FORTRAN_ENV
7785 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7786 == ISOFORTRAN_LOCK_TYPE
)))
7788 gfc_error ("The source-expr at %L shall neither be of type "
7789 "LOCK_TYPE nor have a LOCK_TYPE component if "
7790 "allocate-object at %L is a coarray",
7791 &code
->expr3
->where
, &e
->where
);
7795 /* Check TS18508, C702/C703. */
7796 if (code
->expr3
->ts
.type
== BT_DERIVED
7797 && ((codimension
&& gfc_expr_attr (code
->expr3
).event_comp
)
7798 || (code
->expr3
->ts
.u
.derived
->from_intmod
7799 == INTMOD_ISO_FORTRAN_ENV
7800 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7801 == ISOFORTRAN_EVENT_TYPE
)))
7803 gfc_error ("The source-expr at %L shall neither be of type "
7804 "EVENT_TYPE nor have a EVENT_TYPE component if "
7805 "allocate-object at %L is a coarray",
7806 &code
->expr3
->where
, &e
->where
);
7811 /* Check F08:C629. */
7812 if (is_abstract
&& code
->ext
.alloc
.ts
.type
== BT_UNKNOWN
7815 gcc_assert (e
->ts
.type
== BT_CLASS
);
7816 gfc_error ("Allocating %s of ABSTRACT base type at %L requires a "
7817 "type-spec or source-expr", sym
->name
, &e
->where
);
7821 /* Check F08:C632. */
7822 if (code
->ext
.alloc
.ts
.type
== BT_CHARACTER
&& !e
->ts
.deferred
7823 && !UNLIMITED_POLY (e
))
7827 if (!e
->ts
.u
.cl
->length
)
7830 cmp
= gfc_dep_compare_expr (e
->ts
.u
.cl
->length
,
7831 code
->ext
.alloc
.ts
.u
.cl
->length
);
7832 if (cmp
== 1 || cmp
== -1 || cmp
== -3)
7834 gfc_error ("Allocating %s at %L with type-spec requires the same "
7835 "character-length parameter as in the declaration",
7836 sym
->name
, &e
->where
);
7841 /* In the variable definition context checks, gfc_expr_attr is used
7842 on the expression. This is fooled by the array specification
7843 present in e, thus we have to eliminate that one temporarily. */
7844 e2
= remove_last_array_ref (e
);
7847 t
= gfc_check_vardef_context (e2
, true, true, false,
7848 _("ALLOCATE object"));
7850 t
= gfc_check_vardef_context (e2
, false, true, false,
7851 _("ALLOCATE object"));
7856 if (e
->ts
.type
== BT_CLASS
&& CLASS_DATA (e
)->attr
.dimension
7857 && !code
->expr3
&& code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7859 /* For class arrays, the initialization with SOURCE is done
7860 using _copy and trans_call. It is convenient to exploit that
7861 when the allocated type is different from the declared type but
7862 no SOURCE exists by setting expr3. */
7863 code
->expr3
= gfc_default_initializer (&code
->ext
.alloc
.ts
);
7865 else if (flag_coarray
!= GFC_FCOARRAY_LIB
&& e
->ts
.type
== BT_DERIVED
7866 && e
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
7867 && e
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
7869 /* We have to zero initialize the integer variable. */
7870 code
->expr3
= gfc_get_int_expr (gfc_default_integer_kind
, &e
->where
, 0);
7873 if (e
->ts
.type
== BT_CLASS
&& !unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7875 /* Make sure the vtab symbol is present when
7876 the module variables are generated. */
7877 gfc_typespec ts
= e
->ts
;
7879 ts
= code
->expr3
->ts
;
7880 else if (code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7881 ts
= code
->ext
.alloc
.ts
;
7883 /* Finding the vtab also publishes the type's symbol. Therefore this
7884 statement is necessary. */
7885 gfc_find_derived_vtab (ts
.u
.derived
);
7887 else if (unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7889 /* Again, make sure the vtab symbol is present when
7890 the module variables are generated. */
7891 gfc_typespec
*ts
= NULL
;
7893 ts
= &code
->expr3
->ts
;
7895 ts
= &code
->ext
.alloc
.ts
;
7899 /* Finding the vtab also publishes the type's symbol. Therefore this
7900 statement is necessary. */
7904 if (dimension
== 0 && codimension
== 0)
7907 /* Make sure the last reference node is an array specification. */
7909 if (!ref2
|| ref2
->type
!= REF_ARRAY
|| ref2
->u
.ar
.type
== AR_FULL
7910 || (dimension
&& ref2
->u
.ar
.dimen
== 0))
7915 if (!gfc_notify_std (GFC_STD_F2008
, "Array specification required "
7916 "in ALLOCATE statement at %L", &e
->where
))
7918 if (code
->expr3
->rank
!= 0)
7919 *array_alloc_wo_spec
= true;
7922 gfc_error ("Array specification or array-valued SOURCE= "
7923 "expression required in ALLOCATE statement at %L",
7930 gfc_error ("Array specification required in ALLOCATE statement "
7931 "at %L", &e
->where
);
7936 /* Make sure that the array section reference makes sense in the
7937 context of an ALLOCATE specification. */
7942 for (i
= ar
->dimen
; i
< ar
->dimen
+ ar
->codimen
; i
++)
7944 switch (ar
->dimen_type
[i
])
7946 case DIMEN_THIS_IMAGE
:
7947 gfc_error ("Coarray specification required in ALLOCATE statement "
7948 "at %L", &e
->where
);
7952 if (ar
->start
[i
] == 0 || ar
->end
[i
] == 0)
7954 /* If ar->stride[i] is NULL, we issued a previous error. */
7955 if (ar
->stride
[i
] == NULL
)
7956 gfc_error ("Bad array specification in ALLOCATE statement "
7957 "at %L", &e
->where
);
7960 else if (gfc_dep_compare_expr (ar
->start
[i
], ar
->end
[i
]) == 1)
7962 gfc_error ("Upper cobound is less than lower cobound at %L",
7963 &ar
->start
[i
]->where
);
7969 if (ar
->start
[i
]->expr_type
== EXPR_CONSTANT
)
7971 gcc_assert (ar
->start
[i
]->ts
.type
== BT_INTEGER
);
7972 if (mpz_cmp_si (ar
->start
[i
]->value
.integer
, 1) < 0)
7974 gfc_error ("Upper cobound is less than lower cobound "
7975 "of 1 at %L", &ar
->start
[i
]->where
);
7985 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7991 for (i
= 0; i
< ar
->dimen
; i
++)
7993 if (ar
->type
== AR_ELEMENT
|| ar
->type
== AR_FULL
)
7996 switch (ar
->dimen_type
[i
])
8002 if (ar
->start
[i
] != NULL
8003 && ar
->end
[i
] != NULL
8004 && ar
->stride
[i
] == NULL
)
8012 case DIMEN_THIS_IMAGE
:
8013 gfc_error ("Bad array specification in ALLOCATE statement at %L",
8019 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8021 sym
= a
->expr
->symtree
->n
.sym
;
8023 /* TODO - check derived type components. */
8024 if (gfc_bt_struct (sym
->ts
.type
) || sym
->ts
.type
== BT_CLASS
)
8027 if ((ar
->start
[i
] != NULL
8028 && gfc_find_sym_in_expr (sym
, ar
->start
[i
]))
8029 || (ar
->end
[i
] != NULL
8030 && gfc_find_sym_in_expr (sym
, ar
->end
[i
])))
8032 gfc_error ("%qs must not appear in the array specification at "
8033 "%L in the same ALLOCATE statement where it is "
8034 "itself allocated", sym
->name
, &ar
->where
);
8040 for (i
= ar
->dimen
; i
< ar
->codimen
+ ar
->dimen
; i
++)
8042 if (ar
->dimen_type
[i
] == DIMEN_ELEMENT
8043 || ar
->dimen_type
[i
] == DIMEN_RANGE
)
8045 if (i
== (ar
->dimen
+ ar
->codimen
- 1))
8047 gfc_error ("Expected '*' in coindex specification in ALLOCATE "
8048 "statement at %L", &e
->where
);
8054 if (ar
->dimen_type
[i
] == DIMEN_STAR
&& i
== (ar
->dimen
+ ar
->codimen
- 1)
8055 && ar
->stride
[i
] == NULL
)
8058 gfc_error ("Bad coarray specification in ALLOCATE statement at %L",
8072 resolve_allocate_deallocate (gfc_code
*code
, const char *fcn
)
8074 gfc_expr
*stat
, *errmsg
, *pe
, *qe
;
8075 gfc_alloc
*a
, *p
, *q
;
8078 errmsg
= code
->expr2
;
8080 /* Check the stat variable. */
8083 gfc_check_vardef_context (stat
, false, false, false,
8084 _("STAT variable"));
8086 if ((stat
->ts
.type
!= BT_INTEGER
8087 && !(stat
->ref
&& (stat
->ref
->type
== REF_ARRAY
8088 || stat
->ref
->type
== REF_COMPONENT
)))
8090 gfc_error ("Stat-variable at %L must be a scalar INTEGER "
8091 "variable", &stat
->where
);
8093 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
8094 if (p
->expr
->symtree
->n
.sym
->name
== stat
->symtree
->n
.sym
->name
)
8096 gfc_ref
*ref1
, *ref2
;
8099 for (ref1
= p
->expr
->ref
, ref2
= stat
->ref
; ref1
&& ref2
;
8100 ref1
= ref1
->next
, ref2
= ref2
->next
)
8102 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
8104 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
8113 gfc_error ("Stat-variable at %L shall not be %sd within "
8114 "the same %s statement", &stat
->where
, fcn
, fcn
);
8120 /* Check the errmsg variable. */
8124 gfc_warning (0, "ERRMSG at %L is useless without a STAT tag",
8127 gfc_check_vardef_context (errmsg
, false, false, false,
8128 _("ERRMSG variable"));
8130 /* F18:R928 alloc-opt is ERRMSG = errmsg-variable
8131 F18:R930 errmsg-variable is scalar-default-char-variable
8132 F18:R906 default-char-variable is variable
8133 F18:C906 default-char-variable shall be default character. */
8134 if ((errmsg
->ts
.type
!= BT_CHARACTER
8136 && (errmsg
->ref
->type
== REF_ARRAY
8137 || errmsg
->ref
->type
== REF_COMPONENT
)))
8139 || errmsg
->ts
.kind
!= gfc_default_character_kind
)
8140 gfc_error ("ERRMSG variable at %L shall be a scalar default CHARACTER "
8141 "variable", &errmsg
->where
);
8143 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
8144 if (p
->expr
->symtree
->n
.sym
->name
== errmsg
->symtree
->n
.sym
->name
)
8146 gfc_ref
*ref1
, *ref2
;
8149 for (ref1
= p
->expr
->ref
, ref2
= errmsg
->ref
; ref1
&& ref2
;
8150 ref1
= ref1
->next
, ref2
= ref2
->next
)
8152 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
8154 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
8163 gfc_error ("Errmsg-variable at %L shall not be %sd within "
8164 "the same %s statement", &errmsg
->where
, fcn
, fcn
);
8170 /* Check that an allocate-object appears only once in the statement. */
8172 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
8175 for (q
= p
->next
; q
; q
= q
->next
)
8178 if (pe
->symtree
->n
.sym
->name
== qe
->symtree
->n
.sym
->name
)
8180 /* This is a potential collision. */
8181 gfc_ref
*pr
= pe
->ref
;
8182 gfc_ref
*qr
= qe
->ref
;
8184 /* Follow the references until
8185 a) They start to differ, in which case there is no error;
8186 you can deallocate a%b and a%c in a single statement
8187 b) Both of them stop, which is an error
8188 c) One of them stops, which is also an error. */
8191 if (pr
== NULL
&& qr
== NULL
)
8193 gfc_error ("Allocate-object at %L also appears at %L",
8194 &pe
->where
, &qe
->where
);
8197 else if (pr
!= NULL
&& qr
== NULL
)
8199 gfc_error ("Allocate-object at %L is subobject of"
8200 " object at %L", &pe
->where
, &qe
->where
);
8203 else if (pr
== NULL
&& qr
!= NULL
)
8205 gfc_error ("Allocate-object at %L is subobject of"
8206 " object at %L", &qe
->where
, &pe
->where
);
8209 /* Here, pr != NULL && qr != NULL */
8210 gcc_assert(pr
->type
== qr
->type
);
8211 if (pr
->type
== REF_ARRAY
)
8213 /* Handle cases like allocate(v(3)%x(3), v(2)%x(3)),
8215 gcc_assert (qr
->type
== REF_ARRAY
);
8217 if (pr
->next
&& qr
->next
)
8220 gfc_array_ref
*par
= &(pr
->u
.ar
);
8221 gfc_array_ref
*qar
= &(qr
->u
.ar
);
8223 for (i
=0; i
<par
->dimen
; i
++)
8225 if ((par
->start
[i
] != NULL
8226 || qar
->start
[i
] != NULL
)
8227 && gfc_dep_compare_expr (par
->start
[i
],
8228 qar
->start
[i
]) != 0)
8235 if (pr
->u
.c
.component
->name
!= qr
->u
.c
.component
->name
)
8248 if (strcmp (fcn
, "ALLOCATE") == 0)
8250 bool arr_alloc_wo_spec
= false;
8252 /* Resolving the expr3 in the loop over all objects to allocate would
8253 execute loop invariant code for each loop item. Therefore do it just
8255 if (code
->expr3
&& code
->expr3
->mold
8256 && code
->expr3
->ts
.type
== BT_DERIVED
)
8258 /* Default initialization via MOLD (non-polymorphic). */
8259 gfc_expr
*rhs
= gfc_default_initializer (&code
->expr3
->ts
);
8262 gfc_resolve_expr (rhs
);
8263 gfc_free_expr (code
->expr3
);
8267 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8268 resolve_allocate_expr (a
->expr
, code
, &arr_alloc_wo_spec
);
8270 if (arr_alloc_wo_spec
&& code
->expr3
)
8272 /* Mark the allocate to have to take the array specification
8274 code
->ext
.alloc
.arr_spec_from_expr3
= 1;
8279 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8280 resolve_deallocate_expr (a
->expr
);
8285 /************ SELECT CASE resolution subroutines ************/
8287 /* Callback function for our mergesort variant. Determines interval
8288 overlaps for CASEs. Return <0 if op1 < op2, 0 for overlap, >0 for
8289 op1 > op2. Assumes we're not dealing with the default case.
8290 We have op1 = (:L), (K:L) or (K:) and op2 = (:N), (M:N) or (M:).
8291 There are nine situations to check. */
8294 compare_cases (const gfc_case
*op1
, const gfc_case
*op2
)
8298 if (op1
->low
== NULL
) /* op1 = (:L) */
8300 /* op2 = (:N), so overlap. */
8302 /* op2 = (M:) or (M:N), L < M */
8303 if (op2
->low
!= NULL
8304 && gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8307 else if (op1
->high
== NULL
) /* op1 = (K:) */
8309 /* op2 = (M:), so overlap. */
8311 /* op2 = (:N) or (M:N), K > N */
8312 if (op2
->high
!= NULL
8313 && gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8316 else /* op1 = (K:L) */
8318 if (op2
->low
== NULL
) /* op2 = (:N), K > N */
8319 retval
= (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8321 else if (op2
->high
== NULL
) /* op2 = (M:), L < M */
8322 retval
= (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8324 else /* op2 = (M:N) */
8328 if (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8331 else if (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8340 /* Merge-sort a double linked case list, detecting overlap in the
8341 process. LIST is the head of the double linked case list before it
8342 is sorted. Returns the head of the sorted list if we don't see any
8343 overlap, or NULL otherwise. */
8346 check_case_overlap (gfc_case
*list
)
8348 gfc_case
*p
, *q
, *e
, *tail
;
8349 int insize
, nmerges
, psize
, qsize
, cmp
, overlap_seen
;
8351 /* If the passed list was empty, return immediately. */
8358 /* Loop unconditionally. The only exit from this loop is a return
8359 statement, when we've finished sorting the case list. */
8366 /* Count the number of merges we do in this pass. */
8369 /* Loop while there exists a merge to be done. */
8374 /* Count this merge. */
8377 /* Cut the list in two pieces by stepping INSIZE places
8378 forward in the list, starting from P. */
8381 for (i
= 0; i
< insize
; i
++)
8390 /* Now we have two lists. Merge them! */
8391 while (psize
> 0 || (qsize
> 0 && q
!= NULL
))
8393 /* See from which the next case to merge comes from. */
8396 /* P is empty so the next case must come from Q. */
8401 else if (qsize
== 0 || q
== NULL
)
8410 cmp
= compare_cases (p
, q
);
8413 /* The whole case range for P is less than the
8421 /* The whole case range for Q is greater than
8422 the case range for P. */
8429 /* The cases overlap, or they are the same
8430 element in the list. Either way, we must
8431 issue an error and get the next case from P. */
8432 /* FIXME: Sort P and Q by line number. */
8433 gfc_error ("CASE label at %L overlaps with CASE "
8434 "label at %L", &p
->where
, &q
->where
);
8442 /* Add the next element to the merged list. */
8451 /* P has now stepped INSIZE places along, and so has Q. So
8452 they're the same. */
8457 /* If we have done only one merge or none at all, we've
8458 finished sorting the cases. */
8467 /* Otherwise repeat, merging lists twice the size. */
8473 /* Check to see if an expression is suitable for use in a CASE statement.
8474 Makes sure that all case expressions are scalar constants of the same
8475 type. Return false if anything is wrong. */
8478 validate_case_label_expr (gfc_expr
*e
, gfc_expr
*case_expr
)
8480 if (e
== NULL
) return true;
8482 if (e
->ts
.type
!= case_expr
->ts
.type
)
8484 gfc_error ("Expression in CASE statement at %L must be of type %s",
8485 &e
->where
, gfc_basic_typename (case_expr
->ts
.type
));
8489 /* C805 (R808) For a given case-construct, each case-value shall be of
8490 the same type as case-expr. For character type, length differences
8491 are allowed, but the kind type parameters shall be the same. */
8493 if (case_expr
->ts
.type
== BT_CHARACTER
&& e
->ts
.kind
!= case_expr
->ts
.kind
)
8495 gfc_error ("Expression in CASE statement at %L must be of kind %d",
8496 &e
->where
, case_expr
->ts
.kind
);
8500 /* Convert the case value kind to that of case expression kind,
8503 if (e
->ts
.kind
!= case_expr
->ts
.kind
)
8504 gfc_convert_type_warn (e
, &case_expr
->ts
, 2, 0);
8508 gfc_error ("Expression in CASE statement at %L must be scalar",
8517 /* Given a completely parsed select statement, we:
8519 - Validate all expressions and code within the SELECT.
8520 - Make sure that the selection expression is not of the wrong type.
8521 - Make sure that no case ranges overlap.
8522 - Eliminate unreachable cases and unreachable code resulting from
8523 removing case labels.
8525 The standard does allow unreachable cases, e.g. CASE (5:3). But
8526 they are a hassle for code generation, and to prevent that, we just
8527 cut them out here. This is not necessary for overlapping cases
8528 because they are illegal and we never even try to generate code.
8530 We have the additional caveat that a SELECT construct could have
8531 been a computed GOTO in the source code. Fortunately we can fairly
8532 easily work around that here: The case_expr for a "real" SELECT CASE
8533 is in code->expr1, but for a computed GOTO it is in code->expr2. All
8534 we have to do is make sure that the case_expr is a scalar integer
8538 resolve_select (gfc_code
*code
, bool select_type
)
8541 gfc_expr
*case_expr
;
8542 gfc_case
*cp
, *default_case
, *tail
, *head
;
8543 int seen_unreachable
;
8549 if (code
->expr1
== NULL
)
8551 /* This was actually a computed GOTO statement. */
8552 case_expr
= code
->expr2
;
8553 if (case_expr
->ts
.type
!= BT_INTEGER
|| case_expr
->rank
!= 0)
8554 gfc_error ("Selection expression in computed GOTO statement "
8555 "at %L must be a scalar integer expression",
8558 /* Further checking is not necessary because this SELECT was built
8559 by the compiler, so it should always be OK. Just move the
8560 case_expr from expr2 to expr so that we can handle computed
8561 GOTOs as normal SELECTs from here on. */
8562 code
->expr1
= code
->expr2
;
8567 case_expr
= code
->expr1
;
8568 type
= case_expr
->ts
.type
;
8571 if (type
!= BT_LOGICAL
&& type
!= BT_INTEGER
&& type
!= BT_CHARACTER
)
8573 gfc_error ("Argument of SELECT statement at %L cannot be %s",
8574 &case_expr
->where
, gfc_typename (case_expr
));
8576 /* Punt. Going on here just produce more garbage error messages. */
8581 if (!select_type
&& case_expr
->rank
!= 0)
8583 gfc_error ("Argument of SELECT statement at %L must be a scalar "
8584 "expression", &case_expr
->where
);
8590 /* Raise a warning if an INTEGER case value exceeds the range of
8591 the case-expr. Later, all expressions will be promoted to the
8592 largest kind of all case-labels. */
8594 if (type
== BT_INTEGER
)
8595 for (body
= code
->block
; body
; body
= body
->block
)
8596 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8599 && gfc_check_integer_range (cp
->low
->value
.integer
,
8600 case_expr
->ts
.kind
) != ARITH_OK
)
8601 gfc_warning (0, "Expression in CASE statement at %L is "
8602 "not in the range of %s", &cp
->low
->where
,
8603 gfc_typename (case_expr
));
8606 && cp
->low
!= cp
->high
8607 && gfc_check_integer_range (cp
->high
->value
.integer
,
8608 case_expr
->ts
.kind
) != ARITH_OK
)
8609 gfc_warning (0, "Expression in CASE statement at %L is "
8610 "not in the range of %s", &cp
->high
->where
,
8611 gfc_typename (case_expr
));
8614 /* PR 19168 has a long discussion concerning a mismatch of the kinds
8615 of the SELECT CASE expression and its CASE values. Walk the lists
8616 of case values, and if we find a mismatch, promote case_expr to
8617 the appropriate kind. */
8619 if (type
== BT_LOGICAL
|| type
== BT_INTEGER
)
8621 for (body
= code
->block
; body
; body
= body
->block
)
8623 /* Walk the case label list. */
8624 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8626 /* Intercept the DEFAULT case. It does not have a kind. */
8627 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8630 /* Unreachable case ranges are discarded, so ignore. */
8631 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8632 && cp
->low
!= cp
->high
8633 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8637 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->low
))
8638 gfc_convert_type_warn (case_expr
, &cp
->low
->ts
, 2, 0);
8640 if (cp
->high
!= NULL
8641 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->high
))
8642 gfc_convert_type_warn (case_expr
, &cp
->high
->ts
, 2, 0);
8647 /* Assume there is no DEFAULT case. */
8648 default_case
= NULL
;
8653 for (body
= code
->block
; body
; body
= body
->block
)
8655 /* Assume the CASE list is OK, and all CASE labels can be matched. */
8657 seen_unreachable
= 0;
8659 /* Walk the case label list, making sure that all case labels
8661 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8663 /* Count the number of cases in the whole construct. */
8666 /* Intercept the DEFAULT case. */
8667 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8669 if (default_case
!= NULL
)
8671 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8672 "by a second DEFAULT CASE at %L",
8673 &default_case
->where
, &cp
->where
);
8684 /* Deal with single value cases and case ranges. Errors are
8685 issued from the validation function. */
8686 if (!validate_case_label_expr (cp
->low
, case_expr
)
8687 || !validate_case_label_expr (cp
->high
, case_expr
))
8693 if (type
== BT_LOGICAL
8694 && ((cp
->low
== NULL
|| cp
->high
== NULL
)
8695 || cp
->low
!= cp
->high
))
8697 gfc_error ("Logical range in CASE statement at %L is not "
8698 "allowed", &cp
->low
->where
);
8703 if (type
== BT_LOGICAL
&& cp
->low
->expr_type
== EXPR_CONSTANT
)
8706 value
= cp
->low
->value
.logical
== 0 ? 2 : 1;
8707 if (value
& seen_logical
)
8709 gfc_error ("Constant logical value in CASE statement "
8710 "is repeated at %L",
8715 seen_logical
|= value
;
8718 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8719 && cp
->low
!= cp
->high
8720 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8722 if (warn_surprising
)
8723 gfc_warning (OPT_Wsurprising
,
8724 "Range specification at %L can never be matched",
8727 cp
->unreachable
= 1;
8728 seen_unreachable
= 1;
8732 /* If the case range can be matched, it can also overlap with
8733 other cases. To make sure it does not, we put it in a
8734 double linked list here. We sort that with a merge sort
8735 later on to detect any overlapping cases. */
8739 head
->right
= head
->left
= NULL
;
8744 tail
->right
->left
= tail
;
8751 /* It there was a failure in the previous case label, give up
8752 for this case label list. Continue with the next block. */
8756 /* See if any case labels that are unreachable have been seen.
8757 If so, we eliminate them. This is a bit of a kludge because
8758 the case lists for a single case statement (label) is a
8759 single forward linked lists. */
8760 if (seen_unreachable
)
8762 /* Advance until the first case in the list is reachable. */
8763 while (body
->ext
.block
.case_list
!= NULL
8764 && body
->ext
.block
.case_list
->unreachable
)
8766 gfc_case
*n
= body
->ext
.block
.case_list
;
8767 body
->ext
.block
.case_list
= body
->ext
.block
.case_list
->next
;
8769 gfc_free_case_list (n
);
8772 /* Strip all other unreachable cases. */
8773 if (body
->ext
.block
.case_list
)
8775 for (cp
= body
->ext
.block
.case_list
; cp
&& cp
->next
; cp
= cp
->next
)
8777 if (cp
->next
->unreachable
)
8779 gfc_case
*n
= cp
->next
;
8780 cp
->next
= cp
->next
->next
;
8782 gfc_free_case_list (n
);
8789 /* See if there were overlapping cases. If the check returns NULL,
8790 there was overlap. In that case we don't do anything. If head
8791 is non-NULL, we prepend the DEFAULT case. The sorted list can
8792 then used during code generation for SELECT CASE constructs with
8793 a case expression of a CHARACTER type. */
8796 head
= check_case_overlap (head
);
8798 /* Prepend the default_case if it is there. */
8799 if (head
!= NULL
&& default_case
)
8801 default_case
->left
= NULL
;
8802 default_case
->right
= head
;
8803 head
->left
= default_case
;
8807 /* Eliminate dead blocks that may be the result if we've seen
8808 unreachable case labels for a block. */
8809 for (body
= code
; body
&& body
->block
; body
= body
->block
)
8811 if (body
->block
->ext
.block
.case_list
== NULL
)
8813 /* Cut the unreachable block from the code chain. */
8814 gfc_code
*c
= body
->block
;
8815 body
->block
= c
->block
;
8817 /* Kill the dead block, but not the blocks below it. */
8819 gfc_free_statements (c
);
8823 /* More than two cases is legal but insane for logical selects.
8824 Issue a warning for it. */
8825 if (warn_surprising
&& type
== BT_LOGICAL
&& ncases
> 2)
8826 gfc_warning (OPT_Wsurprising
,
8827 "Logical SELECT CASE block at %L has more that two cases",
8832 /* Check if a derived type is extensible. */
8835 gfc_type_is_extensible (gfc_symbol
*sym
)
8837 return !(sym
->attr
.is_bind_c
|| sym
->attr
.sequence
8838 || (sym
->attr
.is_class
8839 && sym
->components
->ts
.u
.derived
->attr
.unlimited_polymorphic
));
8844 resolve_types (gfc_namespace
*ns
);
8846 /* Resolve an associate-name: Resolve target and ensure the type-spec is
8847 correct as well as possibly the array-spec. */
8850 resolve_assoc_var (gfc_symbol
* sym
, bool resolve_target
)
8854 gcc_assert (sym
->assoc
);
8855 gcc_assert (sym
->attr
.flavor
== FL_VARIABLE
);
8857 /* If this is for SELECT TYPE, the target may not yet be set. In that
8858 case, return. Resolution will be called later manually again when
8860 target
= sym
->assoc
->target
;
8863 gcc_assert (!sym
->assoc
->dangling
);
8865 if (resolve_target
&& !gfc_resolve_expr (target
))
8868 /* For variable targets, we get some attributes from the target. */
8869 if (target
->expr_type
== EXPR_VARIABLE
)
8871 gfc_symbol
*tsym
, *dsym
;
8873 gcc_assert (target
->symtree
);
8874 tsym
= target
->symtree
->n
.sym
;
8876 if (gfc_expr_attr (target
).proc_pointer
)
8878 gfc_error ("Associating entity %qs at %L is a procedure pointer",
8879 tsym
->name
, &target
->where
);
8883 if (tsym
->attr
.flavor
== FL_PROCEDURE
&& tsym
->generic
8884 && (dsym
= gfc_find_dt_in_generic (tsym
)) != NULL
8885 && dsym
->attr
.flavor
== FL_DERIVED
)
8887 gfc_error ("Derived type %qs cannot be used as a variable at %L",
8888 tsym
->name
, &target
->where
);
8892 if (tsym
->attr
.flavor
== FL_PROCEDURE
)
8894 bool is_error
= true;
8895 if (tsym
->attr
.function
&& tsym
->result
== tsym
)
8896 for (gfc_namespace
*ns
= sym
->ns
; ns
; ns
= ns
->parent
)
8897 if (tsym
== ns
->proc_name
)
8904 gfc_error ("Associating entity %qs at %L is a procedure name",
8905 tsym
->name
, &target
->where
);
8910 sym
->attr
.asynchronous
= tsym
->attr
.asynchronous
;
8911 sym
->attr
.volatile_
= tsym
->attr
.volatile_
;
8913 sym
->attr
.target
= tsym
->attr
.target
8914 || gfc_expr_attr (target
).pointer
;
8915 if (is_subref_array (target
))
8916 sym
->attr
.subref_array_pointer
= 1;
8918 else if (target
->ts
.type
== BT_PROCEDURE
)
8920 gfc_error ("Associating selector-expression at %L yields a procedure",
8925 if (target
->expr_type
== EXPR_NULL
)
8927 gfc_error ("Selector at %L cannot be NULL()", &target
->where
);
8930 else if (target
->ts
.type
== BT_UNKNOWN
)
8932 gfc_error ("Selector at %L has no type", &target
->where
);
8936 /* Get type if this was not already set. Note that it can be
8937 some other type than the target in case this is a SELECT TYPE
8938 selector! So we must not update when the type is already there. */
8939 if (sym
->ts
.type
== BT_UNKNOWN
)
8940 sym
->ts
= target
->ts
;
8942 gcc_assert (sym
->ts
.type
!= BT_UNKNOWN
);
8944 /* See if this is a valid association-to-variable. */
8945 sym
->assoc
->variable
= (target
->expr_type
== EXPR_VARIABLE
8946 && !gfc_has_vector_subscript (target
));
8948 /* Finally resolve if this is an array or not. */
8949 if (sym
->attr
.dimension
&& target
->rank
== 0)
8951 /* primary.c makes the assumption that a reference to an associate
8952 name followed by a left parenthesis is an array reference. */
8953 if (sym
->ts
.type
!= BT_CHARACTER
)
8954 gfc_error ("Associate-name %qs at %L is used as array",
8955 sym
->name
, &sym
->declared_at
);
8956 sym
->attr
.dimension
= 0;
8961 /* We cannot deal with class selectors that need temporaries. */
8962 if (target
->ts
.type
== BT_CLASS
8963 && gfc_ref_needs_temporary_p (target
->ref
))
8965 gfc_error ("CLASS selector at %L needs a temporary which is not "
8966 "yet implemented", &target
->where
);
8970 if (target
->ts
.type
== BT_CLASS
)
8971 gfc_fix_class_refs (target
);
8973 if (target
->rank
!= 0 && !sym
->attr
.select_rank_temporary
)
8976 /* The rank may be incorrectly guessed at parsing, therefore make sure
8977 it is corrected now. */
8978 if (sym
->ts
.type
!= BT_CLASS
&& (!sym
->as
|| sym
->assoc
->rankguessed
))
8981 sym
->as
= gfc_get_array_spec ();
8983 as
->rank
= target
->rank
;
8984 as
->type
= AS_DEFERRED
;
8985 as
->corank
= gfc_get_corank (target
);
8986 sym
->attr
.dimension
= 1;
8987 if (as
->corank
!= 0)
8988 sym
->attr
.codimension
= 1;
8990 else if (sym
->ts
.type
== BT_CLASS
&& (!CLASS_DATA (sym
)->as
|| sym
->assoc
->rankguessed
))
8992 if (!CLASS_DATA (sym
)->as
)
8993 CLASS_DATA (sym
)->as
= gfc_get_array_spec ();
8994 as
= CLASS_DATA (sym
)->as
;
8995 as
->rank
= target
->rank
;
8996 as
->type
= AS_DEFERRED
;
8997 as
->corank
= gfc_get_corank (target
);
8998 CLASS_DATA (sym
)->attr
.dimension
= 1;
8999 if (as
->corank
!= 0)
9000 CLASS_DATA (sym
)->attr
.codimension
= 1;
9003 else if (!sym
->attr
.select_rank_temporary
)
9005 /* target's rank is 0, but the type of the sym is still array valued,
9006 which has to be corrected. */
9007 if (sym
->ts
.type
== BT_CLASS
9008 && CLASS_DATA (sym
) && CLASS_DATA (sym
)->as
)
9011 symbol_attribute attr
;
9012 /* The associated variable's type is still the array type
9013 correct this now. */
9014 gfc_typespec
*ts
= &target
->ts
;
9017 for (ref
= target
->ref
; ref
!= NULL
; ref
= ref
->next
)
9022 ts
= &ref
->u
.c
.component
->ts
;
9025 if (ts
->type
== BT_CLASS
)
9026 ts
= &ts
->u
.derived
->components
->ts
;
9032 /* Create a scalar instance of the current class type. Because the
9033 rank of a class array goes into its name, the type has to be
9034 rebuild. The alternative of (re-)setting just the attributes
9035 and as in the current type, destroys the type also in other
9039 sym
->ts
.type
= BT_CLASS
;
9040 attr
= CLASS_DATA (sym
)->attr
;
9042 attr
.associate_var
= 1;
9043 attr
.dimension
= attr
.codimension
= 0;
9044 attr
.class_pointer
= 1;
9045 if (!gfc_build_class_symbol (&sym
->ts
, &attr
, &as
))
9047 /* Make sure the _vptr is set. */
9048 c
= gfc_find_component (sym
->ts
.u
.derived
, "_vptr", true, true, NULL
);
9049 if (c
->ts
.u
.derived
== NULL
)
9050 c
->ts
.u
.derived
= gfc_find_derived_vtab (sym
->ts
.u
.derived
);
9051 CLASS_DATA (sym
)->attr
.pointer
= 1;
9052 CLASS_DATA (sym
)->attr
.class_pointer
= 1;
9053 gfc_set_sym_referenced (sym
->ts
.u
.derived
);
9054 gfc_commit_symbol (sym
->ts
.u
.derived
);
9055 /* _vptr now has the _vtab in it, change it to the _vtype. */
9056 if (c
->ts
.u
.derived
->attr
.vtab
)
9057 c
->ts
.u
.derived
= c
->ts
.u
.derived
->ts
.u
.derived
;
9058 c
->ts
.u
.derived
->ns
->types_resolved
= 0;
9059 resolve_types (c
->ts
.u
.derived
->ns
);
9063 /* Mark this as an associate variable. */
9064 sym
->attr
.associate_var
= 1;
9066 /* Fix up the type-spec for CHARACTER types. */
9067 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.select_type_temporary
)
9070 sym
->ts
.u
.cl
= target
->ts
.u
.cl
;
9072 if (sym
->ts
.deferred
&& target
->expr_type
== EXPR_VARIABLE
9073 && target
->symtree
->n
.sym
->attr
.dummy
9074 && sym
->ts
.u
.cl
== target
->ts
.u
.cl
)
9076 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
9077 sym
->ts
.deferred
= 1;
9080 if (!sym
->ts
.u
.cl
->length
9081 && !sym
->ts
.deferred
9082 && target
->expr_type
== EXPR_CONSTANT
)
9084 sym
->ts
.u
.cl
->length
=
9085 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
9086 target
->value
.character
.length
);
9088 else if ((!sym
->ts
.u
.cl
->length
9089 || sym
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
)
9090 && target
->expr_type
!= EXPR_VARIABLE
)
9092 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
9093 sym
->ts
.deferred
= 1;
9095 /* This is reset in trans-stmt.c after the assignment
9096 of the target expression to the associate name. */
9097 sym
->attr
.allocatable
= 1;
9101 /* If the target is a good class object, so is the associate variable. */
9102 if (sym
->ts
.type
== BT_CLASS
&& gfc_expr_attr (target
).class_ok
)
9103 sym
->attr
.class_ok
= 1;
9107 /* Ensure that SELECT TYPE expressions have the correct rank and a full
9108 array reference, where necessary. The symbols are artificial and so
9109 the dimension attribute and arrayspec can also be set. In addition,
9110 sometimes the expr1 arrives as BT_DERIVED, when the symbol is BT_CLASS.
9111 This is corrected here as well.*/
9114 fixup_array_ref (gfc_expr
**expr1
, gfc_expr
*expr2
,
9115 int rank
, gfc_ref
*ref
)
9117 gfc_ref
*nref
= (*expr1
)->ref
;
9118 gfc_symbol
*sym1
= (*expr1
)->symtree
->n
.sym
;
9119 gfc_symbol
*sym2
= expr2
? expr2
->symtree
->n
.sym
: NULL
;
9120 (*expr1
)->rank
= rank
;
9121 if (sym1
->ts
.type
== BT_CLASS
)
9123 if ((*expr1
)->ts
.type
!= BT_CLASS
)
9124 (*expr1
)->ts
= sym1
->ts
;
9126 CLASS_DATA (sym1
)->attr
.dimension
= 1;
9127 if (CLASS_DATA (sym1
)->as
== NULL
&& sym2
)
9128 CLASS_DATA (sym1
)->as
9129 = gfc_copy_array_spec (CLASS_DATA (sym2
)->as
);
9133 sym1
->attr
.dimension
= 1;
9134 if (sym1
->as
== NULL
&& sym2
)
9135 sym1
->as
= gfc_copy_array_spec (sym2
->as
);
9138 for (; nref
; nref
= nref
->next
)
9139 if (nref
->next
== NULL
)
9142 if (ref
&& nref
&& nref
->type
!= REF_ARRAY
)
9143 nref
->next
= gfc_copy_ref (ref
);
9144 else if (ref
&& !nref
)
9145 (*expr1
)->ref
= gfc_copy_ref (ref
);
9150 build_loc_call (gfc_expr
*sym_expr
)
9153 loc_call
= gfc_get_expr ();
9154 loc_call
->expr_type
= EXPR_FUNCTION
;
9155 gfc_get_sym_tree ("_loc", gfc_current_ns
, &loc_call
->symtree
, false);
9156 loc_call
->symtree
->n
.sym
->attr
.flavor
= FL_PROCEDURE
;
9157 loc_call
->symtree
->n
.sym
->attr
.intrinsic
= 1;
9158 loc_call
->symtree
->n
.sym
->result
= loc_call
->symtree
->n
.sym
;
9159 gfc_commit_symbol (loc_call
->symtree
->n
.sym
);
9160 loc_call
->ts
.type
= BT_INTEGER
;
9161 loc_call
->ts
.kind
= gfc_index_integer_kind
;
9162 loc_call
->value
.function
.isym
= gfc_intrinsic_function_by_id (GFC_ISYM_LOC
);
9163 loc_call
->value
.function
.actual
= gfc_get_actual_arglist ();
9164 loc_call
->value
.function
.actual
->expr
= sym_expr
;
9165 loc_call
->where
= sym_expr
->where
;
9169 /* Resolve a SELECT TYPE statement. */
9172 resolve_select_type (gfc_code
*code
, gfc_namespace
*old_ns
)
9174 gfc_symbol
*selector_type
;
9175 gfc_code
*body
, *new_st
, *if_st
, *tail
;
9176 gfc_code
*class_is
= NULL
, *default_case
= NULL
;
9179 char name
[GFC_MAX_SYMBOL_LEN
];
9183 gfc_ref
* ref
= NULL
;
9184 gfc_expr
*selector_expr
= NULL
;
9186 ns
= code
->ext
.block
.ns
;
9189 /* Check for F03:C813. */
9190 if (code
->expr1
->ts
.type
!= BT_CLASS
9191 && !(code
->expr2
&& code
->expr2
->ts
.type
== BT_CLASS
))
9193 gfc_error ("Selector shall be polymorphic in SELECT TYPE statement "
9194 "at %L", &code
->loc
);
9198 if (!code
->expr1
->symtree
->n
.sym
->attr
.class_ok
)
9203 gfc_ref
*ref2
= NULL
;
9204 for (ref
= code
->expr2
->ref
; ref
!= NULL
; ref
= ref
->next
)
9205 if (ref
->type
== REF_COMPONENT
9206 && ref
->u
.c
.component
->ts
.type
== BT_CLASS
)
9211 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
9212 code
->expr1
->symtree
->n
.sym
->ts
= ref2
->u
.c
.component
->ts
;
9213 selector_type
= CLASS_DATA (ref2
->u
.c
.component
)->ts
.u
.derived
;
9217 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
9218 code
->expr1
->symtree
->n
.sym
->ts
= code
->expr2
->ts
;
9219 selector_type
= CLASS_DATA (code
->expr2
)->ts
.u
.derived
;
9222 if (code
->expr2
->rank
&& CLASS_DATA (code
->expr1
)->as
)
9223 CLASS_DATA (code
->expr1
)->as
->rank
= code
->expr2
->rank
;
9225 /* F2008: C803 The selector expression must not be coindexed. */
9226 if (gfc_is_coindexed (code
->expr2
))
9228 gfc_error ("Selector at %L must not be coindexed",
9229 &code
->expr2
->where
);
9236 selector_type
= CLASS_DATA (code
->expr1
)->ts
.u
.derived
;
9238 if (gfc_is_coindexed (code
->expr1
))
9240 gfc_error ("Selector at %L must not be coindexed",
9241 &code
->expr1
->where
);
9246 /* Loop over TYPE IS / CLASS IS cases. */
9247 for (body
= code
->block
; body
; body
= body
->block
)
9249 c
= body
->ext
.block
.case_list
;
9253 /* Check for repeated cases. */
9254 for (tail
= code
->block
; tail
; tail
= tail
->block
)
9256 gfc_case
*d
= tail
->ext
.block
.case_list
;
9260 if (c
->ts
.type
== d
->ts
.type
9261 && ((c
->ts
.type
== BT_DERIVED
9262 && c
->ts
.u
.derived
&& d
->ts
.u
.derived
9263 && !strcmp (c
->ts
.u
.derived
->name
,
9264 d
->ts
.u
.derived
->name
))
9265 || c
->ts
.type
== BT_UNKNOWN
9266 || (!(c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9267 && c
->ts
.kind
== d
->ts
.kind
)))
9269 gfc_error ("TYPE IS at %L overlaps with TYPE IS at %L",
9270 &c
->where
, &d
->where
);
9276 /* Check F03:C815. */
9277 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9278 && !selector_type
->attr
.unlimited_polymorphic
9279 && !gfc_type_is_extensible (c
->ts
.u
.derived
))
9281 gfc_error ("Derived type %qs at %L must be extensible",
9282 c
->ts
.u
.derived
->name
, &c
->where
);
9287 /* Check F03:C816. */
9288 if (c
->ts
.type
!= BT_UNKNOWN
&& !selector_type
->attr
.unlimited_polymorphic
9289 && ((c
->ts
.type
!= BT_DERIVED
&& c
->ts
.type
!= BT_CLASS
)
9290 || !gfc_type_is_extension_of (selector_type
, c
->ts
.u
.derived
)))
9292 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9293 gfc_error ("Derived type %qs at %L must be an extension of %qs",
9294 c
->ts
.u
.derived
->name
, &c
->where
, selector_type
->name
);
9296 gfc_error ("Unexpected intrinsic type %qs at %L",
9297 gfc_basic_typename (c
->ts
.type
), &c
->where
);
9302 /* Check F03:C814. */
9303 if (c
->ts
.type
== BT_CHARACTER
9304 && (c
->ts
.u
.cl
->length
!= NULL
|| c
->ts
.deferred
))
9306 gfc_error ("The type-spec at %L shall specify that each length "
9307 "type parameter is assumed", &c
->where
);
9312 /* Intercept the DEFAULT case. */
9313 if (c
->ts
.type
== BT_UNKNOWN
)
9315 /* Check F03:C818. */
9318 gfc_error ("The DEFAULT CASE at %L cannot be followed "
9319 "by a second DEFAULT CASE at %L",
9320 &default_case
->ext
.block
.case_list
->where
, &c
->where
);
9325 default_case
= body
;
9332 /* Transform SELECT TYPE statement to BLOCK and associate selector to
9333 target if present. If there are any EXIT statements referring to the
9334 SELECT TYPE construct, this is no problem because the gfc_code
9335 reference stays the same and EXIT is equally possible from the BLOCK
9336 it is changed to. */
9337 code
->op
= EXEC_BLOCK
;
9340 gfc_association_list
* assoc
;
9342 assoc
= gfc_get_association_list ();
9343 assoc
->st
= code
->expr1
->symtree
;
9344 assoc
->target
= gfc_copy_expr (code
->expr2
);
9345 assoc
->target
->where
= code
->expr2
->where
;
9346 /* assoc->variable will be set by resolve_assoc_var. */
9348 code
->ext
.block
.assoc
= assoc
;
9349 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
9351 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
9354 code
->ext
.block
.assoc
= NULL
;
9356 /* Ensure that the selector rank and arrayspec are available to
9357 correct expressions in which they might be missing. */
9358 if (code
->expr2
&& code
->expr2
->rank
)
9360 rank
= code
->expr2
->rank
;
9361 for (ref
= code
->expr2
->ref
; ref
; ref
= ref
->next
)
9362 if (ref
->next
== NULL
)
9364 if (ref
&& ref
->type
== REF_ARRAY
)
9365 ref
= gfc_copy_ref (ref
);
9367 /* Fixup expr1 if necessary. */
9369 fixup_array_ref (&code
->expr1
, code
->expr2
, rank
, ref
);
9371 else if (code
->expr1
->rank
)
9373 rank
= code
->expr1
->rank
;
9374 for (ref
= code
->expr1
->ref
; ref
; ref
= ref
->next
)
9375 if (ref
->next
== NULL
)
9377 if (ref
&& ref
->type
== REF_ARRAY
)
9378 ref
= gfc_copy_ref (ref
);
9381 /* Add EXEC_SELECT to switch on type. */
9382 new_st
= gfc_get_code (code
->op
);
9383 new_st
->expr1
= code
->expr1
;
9384 new_st
->expr2
= code
->expr2
;
9385 new_st
->block
= code
->block
;
9386 code
->expr1
= code
->expr2
= NULL
;
9391 ns
->code
->next
= new_st
;
9393 code
->op
= EXEC_SELECT_TYPE
;
9395 /* Use the intrinsic LOC function to generate an integer expression
9396 for the vtable of the selector. Note that the rank of the selector
9397 expression has to be set to zero. */
9398 gfc_add_vptr_component (code
->expr1
);
9399 code
->expr1
->rank
= 0;
9400 code
->expr1
= build_loc_call (code
->expr1
);
9401 selector_expr
= code
->expr1
->value
.function
.actual
->expr
;
9403 /* Loop over TYPE IS / CLASS IS cases. */
9404 for (body
= code
->block
; body
; body
= body
->block
)
9408 c
= body
->ext
.block
.case_list
;
9410 /* Generate an index integer expression for address of the
9411 TYPE/CLASS vtable and store it in c->low. The hash expression
9412 is stored in c->high and is used to resolve intrinsic cases. */
9413 if (c
->ts
.type
!= BT_UNKNOWN
)
9415 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9417 vtab
= gfc_find_derived_vtab (c
->ts
.u
.derived
);
9419 c
->high
= gfc_get_int_expr (gfc_integer_4_kind
, NULL
,
9420 c
->ts
.u
.derived
->hash_value
);
9424 vtab
= gfc_find_vtab (&c
->ts
);
9425 gcc_assert (vtab
&& CLASS_DATA (vtab
)->initializer
);
9426 e
= CLASS_DATA (vtab
)->initializer
;
9427 c
->high
= gfc_copy_expr (e
);
9428 if (c
->high
->ts
.kind
!= gfc_integer_4_kind
)
9431 ts
.kind
= gfc_integer_4_kind
;
9432 ts
.type
= BT_INTEGER
;
9433 gfc_convert_type_warn (c
->high
, &ts
, 2, 0);
9437 e
= gfc_lval_expr_from_sym (vtab
);
9438 c
->low
= build_loc_call (e
);
9443 /* Associate temporary to selector. This should only be done
9444 when this case is actually true, so build a new ASSOCIATE
9445 that does precisely this here (instead of using the
9448 if (c
->ts
.type
== BT_CLASS
)
9449 sprintf (name
, "__tmp_class_%s", c
->ts
.u
.derived
->name
);
9450 else if (c
->ts
.type
== BT_DERIVED
)
9451 sprintf (name
, "__tmp_type_%s", c
->ts
.u
.derived
->name
);
9452 else if (c
->ts
.type
== BT_CHARACTER
)
9454 HOST_WIDE_INT charlen
= 0;
9455 if (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9456 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9457 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9458 snprintf (name
, sizeof (name
),
9459 "__tmp_%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9460 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9463 sprintf (name
, "__tmp_%s_%d", gfc_basic_typename (c
->ts
.type
),
9466 st
= gfc_find_symtree (ns
->sym_root
, name
);
9467 gcc_assert (st
->n
.sym
->assoc
);
9468 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9469 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9470 if (c
->ts
.type
!= BT_CLASS
&& c
->ts
.type
!= BT_UNKNOWN
)
9472 gfc_add_data_component (st
->n
.sym
->assoc
->target
);
9473 /* Fixup the target expression if necessary. */
9475 fixup_array_ref (&st
->n
.sym
->assoc
->target
, NULL
, rank
, ref
);
9478 new_st
= gfc_get_code (EXEC_BLOCK
);
9479 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9480 new_st
->ext
.block
.ns
->code
= body
->next
;
9481 body
->next
= new_st
;
9483 /* Chain in the new list only if it is marked as dangling. Otherwise
9484 there is a CASE label overlap and this is already used. Just ignore,
9485 the error is diagnosed elsewhere. */
9486 if (st
->n
.sym
->assoc
->dangling
)
9488 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9489 st
->n
.sym
->assoc
->dangling
= 0;
9492 resolve_assoc_var (st
->n
.sym
, false);
9495 /* Take out CLASS IS cases for separate treatment. */
9497 while (body
&& body
->block
)
9499 if (body
->block
->ext
.block
.case_list
->ts
.type
== BT_CLASS
)
9501 /* Add to class_is list. */
9502 if (class_is
== NULL
)
9504 class_is
= body
->block
;
9509 for (tail
= class_is
; tail
->block
; tail
= tail
->block
) ;
9510 tail
->block
= body
->block
;
9513 /* Remove from EXEC_SELECT list. */
9514 body
->block
= body
->block
->block
;
9527 /* Add a default case to hold the CLASS IS cases. */
9528 for (tail
= code
; tail
->block
; tail
= tail
->block
) ;
9529 tail
->block
= gfc_get_code (EXEC_SELECT_TYPE
);
9531 tail
->ext
.block
.case_list
= gfc_get_case ();
9532 tail
->ext
.block
.case_list
->ts
.type
= BT_UNKNOWN
;
9534 default_case
= tail
;
9537 /* More than one CLASS IS block? */
9538 if (class_is
->block
)
9542 /* Sort CLASS IS blocks by extension level. */
9546 for (c1
= &class_is
; (*c1
) && (*c1
)->block
; c1
= &((*c1
)->block
))
9549 /* F03:C817 (check for doubles). */
9550 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->hash_value
9551 == c2
->ext
.block
.case_list
->ts
.u
.derived
->hash_value
)
9553 gfc_error ("Double CLASS IS block in SELECT TYPE "
9555 &c2
->ext
.block
.case_list
->where
);
9558 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
9559 < c2
->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
)
9562 (*c1
)->block
= c2
->block
;
9572 /* Generate IF chain. */
9573 if_st
= gfc_get_code (EXEC_IF
);
9575 for (body
= class_is
; body
; body
= body
->block
)
9577 new_st
->block
= gfc_get_code (EXEC_IF
);
9578 new_st
= new_st
->block
;
9579 /* Set up IF condition: Call _gfortran_is_extension_of. */
9580 new_st
->expr1
= gfc_get_expr ();
9581 new_st
->expr1
->expr_type
= EXPR_FUNCTION
;
9582 new_st
->expr1
->ts
.type
= BT_LOGICAL
;
9583 new_st
->expr1
->ts
.kind
= 4;
9584 new_st
->expr1
->value
.function
.name
= gfc_get_string (PREFIX ("is_extension_of"));
9585 new_st
->expr1
->value
.function
.isym
= XCNEW (gfc_intrinsic_sym
);
9586 new_st
->expr1
->value
.function
.isym
->id
= GFC_ISYM_EXTENDS_TYPE_OF
;
9587 /* Set up arguments. */
9588 new_st
->expr1
->value
.function
.actual
= gfc_get_actual_arglist ();
9589 new_st
->expr1
->value
.function
.actual
->expr
= gfc_get_variable_expr (selector_expr
->symtree
);
9590 new_st
->expr1
->value
.function
.actual
->expr
->where
= code
->loc
;
9591 new_st
->expr1
->where
= code
->loc
;
9592 gfc_add_vptr_component (new_st
->expr1
->value
.function
.actual
->expr
);
9593 vtab
= gfc_find_derived_vtab (body
->ext
.block
.case_list
->ts
.u
.derived
);
9594 st
= gfc_find_symtree (vtab
->ns
->sym_root
, vtab
->name
);
9595 new_st
->expr1
->value
.function
.actual
->next
= gfc_get_actual_arglist ();
9596 new_st
->expr1
->value
.function
.actual
->next
->expr
= gfc_get_variable_expr (st
);
9597 new_st
->expr1
->value
.function
.actual
->next
->expr
->where
= code
->loc
;
9598 new_st
->next
= body
->next
;
9600 if (default_case
->next
)
9602 new_st
->block
= gfc_get_code (EXEC_IF
);
9603 new_st
= new_st
->block
;
9604 new_st
->next
= default_case
->next
;
9607 /* Replace CLASS DEFAULT code by the IF chain. */
9608 default_case
->next
= if_st
;
9611 /* Resolve the internal code. This cannot be done earlier because
9612 it requires that the sym->assoc of selectors is set already. */
9613 gfc_current_ns
= ns
;
9614 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9615 gfc_current_ns
= old_ns
;
9622 /* Resolve a SELECT RANK statement. */
9625 resolve_select_rank (gfc_code
*code
, gfc_namespace
*old_ns
)
9628 gfc_code
*body
, *new_st
, *tail
;
9630 char tname
[GFC_MAX_SYMBOL_LEN
];
9631 char name
[2 * GFC_MAX_SYMBOL_LEN
];
9633 gfc_expr
*selector_expr
= NULL
;
9635 HOST_WIDE_INT charlen
= 0;
9637 ns
= code
->ext
.block
.ns
;
9640 code
->op
= EXEC_BLOCK
;
9643 gfc_association_list
* assoc
;
9645 assoc
= gfc_get_association_list ();
9646 assoc
->st
= code
->expr1
->symtree
;
9647 assoc
->target
= gfc_copy_expr (code
->expr2
);
9648 assoc
->target
->where
= code
->expr2
->where
;
9649 /* assoc->variable will be set by resolve_assoc_var. */
9651 code
->ext
.block
.assoc
= assoc
;
9652 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
9654 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
9657 code
->ext
.block
.assoc
= NULL
;
9659 /* Loop over RANK cases. Note that returning on the errors causes a
9660 cascade of further errors because the case blocks do not compile
9662 for (body
= code
->block
; body
; body
= body
->block
)
9664 c
= body
->ext
.block
.case_list
;
9666 case_value
= (int) mpz_get_si (c
->low
->value
.integer
);
9670 /* Check for repeated cases. */
9671 for (tail
= code
->block
; tail
; tail
= tail
->block
)
9673 gfc_case
*d
= tail
->ext
.block
.case_list
;
9679 /* Check F2018: C1153. */
9680 if (!c
->low
&& !d
->low
)
9681 gfc_error ("RANK DEFAULT at %L is repeated at %L",
9682 &c
->where
, &d
->where
);
9684 if (!c
->low
|| !d
->low
)
9687 /* Check F2018: C1153. */
9688 case_value2
= (int) mpz_get_si (d
->low
->value
.integer
);
9689 if ((case_value
== case_value2
) && case_value
== -1)
9690 gfc_error ("RANK (*) at %L is repeated at %L",
9691 &c
->where
, &d
->where
);
9692 else if (case_value
== case_value2
)
9693 gfc_error ("RANK (%i) at %L is repeated at %L",
9694 case_value
, &c
->where
, &d
->where
);
9700 /* Check F2018: C1155. */
9701 if (case_value
== -1 && (gfc_expr_attr (code
->expr1
).allocatable
9702 || gfc_expr_attr (code
->expr1
).pointer
))
9703 gfc_error ("RANK (*) at %L cannot be used with the pointer or "
9704 "allocatable selector at %L", &c
->where
, &code
->expr1
->where
);
9706 if (case_value
== -1 && (gfc_expr_attr (code
->expr1
).allocatable
9707 || gfc_expr_attr (code
->expr1
).pointer
))
9708 gfc_error ("RANK (*) at %L cannot be used with the pointer or "
9709 "allocatable selector at %L", &c
->where
, &code
->expr1
->where
);
9712 /* Add EXEC_SELECT to switch on rank. */
9713 new_st
= gfc_get_code (code
->op
);
9714 new_st
->expr1
= code
->expr1
;
9715 new_st
->expr2
= code
->expr2
;
9716 new_st
->block
= code
->block
;
9717 code
->expr1
= code
->expr2
= NULL
;
9722 ns
->code
->next
= new_st
;
9724 code
->op
= EXEC_SELECT_RANK
;
9726 selector_expr
= code
->expr1
;
9728 /* Loop over SELECT RANK cases. */
9729 for (body
= code
->block
; body
; body
= body
->block
)
9731 c
= body
->ext
.block
.case_list
;
9734 /* Pass on the default case. */
9738 /* Associate temporary to selector. This should only be done
9739 when this case is actually true, so build a new ASSOCIATE
9740 that does precisely this here (instead of using the
9742 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9743 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9744 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9746 if (c
->ts
.type
== BT_CLASS
)
9747 sprintf (tname
, "class_%s", c
->ts
.u
.derived
->name
);
9748 else if (c
->ts
.type
== BT_DERIVED
)
9749 sprintf (tname
, "type_%s", c
->ts
.u
.derived
->name
);
9750 else if (c
->ts
.type
!= BT_CHARACTER
)
9751 sprintf (tname
, "%s_%d", gfc_basic_typename (c
->ts
.type
), c
->ts
.kind
);
9753 sprintf (tname
, "%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9754 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9756 case_value
= (int) mpz_get_si (c
->low
->value
.integer
);
9757 if (case_value
>= 0)
9758 sprintf (name
, "__tmp_%s_rank_%d", tname
, case_value
);
9760 sprintf (name
, "__tmp_%s_rank_m%d", tname
, -case_value
);
9762 st
= gfc_find_symtree (ns
->sym_root
, name
);
9763 gcc_assert (st
->n
.sym
->assoc
);
9765 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9766 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9768 new_st
= gfc_get_code (EXEC_BLOCK
);
9769 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9770 new_st
->ext
.block
.ns
->code
= body
->next
;
9771 body
->next
= new_st
;
9773 /* Chain in the new list only if it is marked as dangling. Otherwise
9774 there is a CASE label overlap and this is already used. Just ignore,
9775 the error is diagnosed elsewhere. */
9776 if (st
->n
.sym
->assoc
->dangling
)
9778 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9779 st
->n
.sym
->assoc
->dangling
= 0;
9782 resolve_assoc_var (st
->n
.sym
, false);
9785 gfc_current_ns
= ns
;
9786 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9787 gfc_current_ns
= old_ns
;
9791 /* Resolve a transfer statement. This is making sure that:
9792 -- a derived type being transferred has only non-pointer components
9793 -- a derived type being transferred doesn't have private components, unless
9794 it's being transferred from the module where the type was defined
9795 -- we're not trying to transfer a whole assumed size array. */
9798 resolve_transfer (gfc_code
*code
)
9800 gfc_symbol
*sym
, *derived
;
9804 bool formatted
= false;
9805 gfc_dt
*dt
= code
->ext
.dt
;
9806 gfc_symbol
*dtio_sub
= NULL
;
9810 while (exp
!= NULL
&& exp
->expr_type
== EXPR_OP
9811 && exp
->value
.op
.op
== INTRINSIC_PARENTHESES
)
9812 exp
= exp
->value
.op
.op1
;
9814 if (exp
&& exp
->expr_type
== EXPR_NULL
9817 gfc_error ("Invalid context for NULL () intrinsic at %L",
9822 if (exp
== NULL
|| (exp
->expr_type
!= EXPR_VARIABLE
9823 && exp
->expr_type
!= EXPR_FUNCTION
9824 && exp
->expr_type
!= EXPR_STRUCTURE
))
9827 /* If we are reading, the variable will be changed. Note that
9828 code->ext.dt may be NULL if the TRANSFER is related to
9829 an INQUIRE statement -- but in this case, we are not reading, either. */
9830 if (dt
&& dt
->dt_io_kind
->value
.iokind
== M_READ
9831 && !gfc_check_vardef_context (exp
, false, false, false,
9835 const gfc_typespec
*ts
= exp
->expr_type
== EXPR_STRUCTURE
9836 || exp
->expr_type
== EXPR_FUNCTION
9837 ? &exp
->ts
: &exp
->symtree
->n
.sym
->ts
;
9839 /* Go to actual component transferred. */
9840 for (ref
= exp
->ref
; ref
; ref
= ref
->next
)
9841 if (ref
->type
== REF_COMPONENT
)
9842 ts
= &ref
->u
.c
.component
->ts
;
9844 if (dt
&& dt
->dt_io_kind
->value
.iokind
!= M_INQUIRE
9845 && (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
))
9847 derived
= ts
->u
.derived
;
9849 /* Determine when to use the formatted DTIO procedure. */
9850 if (dt
&& (dt
->format_expr
|| dt
->format_label
))
9853 write
= dt
->dt_io_kind
->value
.iokind
== M_WRITE
9854 || dt
->dt_io_kind
->value
.iokind
== M_PRINT
;
9855 dtio_sub
= gfc_find_specific_dtio_proc (derived
, write
, formatted
);
9857 if (dtio_sub
!= NULL
&& exp
->expr_type
== EXPR_VARIABLE
)
9860 sym
= exp
->symtree
->n
.sym
->ns
->proc_name
;
9861 /* Check to see if this is a nested DTIO call, with the
9862 dummy as the io-list object. */
9863 if (sym
&& sym
== dtio_sub
&& sym
->formal
9864 && sym
->formal
->sym
== exp
->symtree
->n
.sym
9865 && exp
->ref
== NULL
)
9867 if (!sym
->attr
.recursive
)
9869 gfc_error ("DTIO %s procedure at %L must be recursive",
9870 sym
->name
, &sym
->declared_at
);
9877 if (ts
->type
== BT_CLASS
&& dtio_sub
== NULL
)
9879 gfc_error ("Data transfer element at %L cannot be polymorphic unless "
9880 "it is processed by a defined input/output procedure",
9885 if (ts
->type
== BT_DERIVED
)
9887 /* Check that transferred derived type doesn't contain POINTER
9888 components unless it is processed by a defined input/output
9890 if (ts
->u
.derived
->attr
.pointer_comp
&& dtio_sub
== NULL
)
9892 gfc_error ("Data transfer element at %L cannot have POINTER "
9893 "components unless it is processed by a defined "
9894 "input/output procedure", &code
->loc
);
9899 if (ts
->u
.derived
->attr
.proc_pointer_comp
)
9901 gfc_error ("Data transfer element at %L cannot have "
9902 "procedure pointer components", &code
->loc
);
9906 if (ts
->u
.derived
->attr
.alloc_comp
&& dtio_sub
== NULL
)
9908 gfc_error ("Data transfer element at %L cannot have ALLOCATABLE "
9909 "components unless it is processed by a defined "
9910 "input/output procedure", &code
->loc
);
9914 /* C_PTR and C_FUNPTR have private components which means they cannot
9915 be printed. However, if -std=gnu and not -pedantic, allow
9916 the component to be printed to help debugging. */
9917 if (ts
->u
.derived
->ts
.f90_type
== BT_VOID
)
9919 if (!gfc_notify_std (GFC_STD_GNU
, "Data transfer element at %L "
9920 "cannot have PRIVATE components", &code
->loc
))
9923 else if (derived_inaccessible (ts
->u
.derived
) && dtio_sub
== NULL
)
9925 gfc_error ("Data transfer element at %L cannot have "
9926 "PRIVATE components unless it is processed by "
9927 "a defined input/output procedure", &code
->loc
);
9932 if (exp
->expr_type
== EXPR_STRUCTURE
)
9935 sym
= exp
->symtree
->n
.sym
;
9937 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SIZE
&& exp
->ref
9938 && exp
->ref
->type
== REF_ARRAY
&& exp
->ref
->u
.ar
.type
== AR_FULL
)
9940 gfc_error ("Data transfer element at %L cannot be a full reference to "
9941 "an assumed-size array", &code
->loc
);
9947 /*********** Toplevel code resolution subroutines ***********/
9949 /* Find the set of labels that are reachable from this block. We also
9950 record the last statement in each block. */
9953 find_reachable_labels (gfc_code
*block
)
9960 cs_base
->reachable_labels
= bitmap_alloc (&labels_obstack
);
9962 /* Collect labels in this block. We don't keep those corresponding
9963 to END {IF|SELECT}, these are checked in resolve_branch by going
9964 up through the code_stack. */
9965 for (c
= block
; c
; c
= c
->next
)
9967 if (c
->here
&& c
->op
!= EXEC_END_NESTED_BLOCK
)
9968 bitmap_set_bit (cs_base
->reachable_labels
, c
->here
->value
);
9971 /* Merge with labels from parent block. */
9974 gcc_assert (cs_base
->prev
->reachable_labels
);
9975 bitmap_ior_into (cs_base
->reachable_labels
,
9976 cs_base
->prev
->reachable_labels
);
9982 resolve_lock_unlock_event (gfc_code
*code
)
9984 if (code
->expr1
->expr_type
== EXPR_FUNCTION
9985 && code
->expr1
->value
.function
.isym
9986 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
9987 remove_caf_get_intrinsic (code
->expr1
);
9989 if ((code
->op
== EXEC_LOCK
|| code
->op
== EXEC_UNLOCK
)
9990 && (code
->expr1
->ts
.type
!= BT_DERIVED
9991 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9992 || code
->expr1
->ts
.u
.derived
->from_intmod
!= INTMOD_ISO_FORTRAN_ENV
9993 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
!= ISOFORTRAN_LOCK_TYPE
9994 || code
->expr1
->rank
!= 0
9995 || (!gfc_is_coarray (code
->expr1
) &&
9996 !gfc_is_coindexed (code
->expr1
))))
9997 gfc_error ("Lock variable at %L must be a scalar of type LOCK_TYPE",
9998 &code
->expr1
->where
);
9999 else if ((code
->op
== EXEC_EVENT_POST
|| code
->op
== EXEC_EVENT_WAIT
)
10000 && (code
->expr1
->ts
.type
!= BT_DERIVED
10001 || code
->expr1
->expr_type
!= EXPR_VARIABLE
10002 || code
->expr1
->ts
.u
.derived
->from_intmod
10003 != INTMOD_ISO_FORTRAN_ENV
10004 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
10005 != ISOFORTRAN_EVENT_TYPE
10006 || code
->expr1
->rank
!= 0))
10007 gfc_error ("Event variable at %L must be a scalar of type EVENT_TYPE",
10008 &code
->expr1
->where
);
10009 else if (code
->op
== EXEC_EVENT_POST
&& !gfc_is_coarray (code
->expr1
)
10010 && !gfc_is_coindexed (code
->expr1
))
10011 gfc_error ("Event variable argument at %L must be a coarray or coindexed",
10012 &code
->expr1
->where
);
10013 else if (code
->op
== EXEC_EVENT_WAIT
&& !gfc_is_coarray (code
->expr1
))
10014 gfc_error ("Event variable argument at %L must be a coarray but not "
10015 "coindexed", &code
->expr1
->where
);
10019 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
10020 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
10021 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
10022 &code
->expr2
->where
);
10025 && !gfc_check_vardef_context (code
->expr2
, false, false, false,
10026 _("STAT variable")))
10029 /* Check ERRMSG. */
10031 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
10032 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
10033 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
10034 &code
->expr3
->where
);
10037 && !gfc_check_vardef_context (code
->expr3
, false, false, false,
10038 _("ERRMSG variable")))
10041 /* Check for LOCK the ACQUIRED_LOCK. */
10042 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
10043 && (code
->expr4
->ts
.type
!= BT_LOGICAL
|| code
->expr4
->rank
!= 0
10044 || code
->expr4
->expr_type
!= EXPR_VARIABLE
))
10045 gfc_error ("ACQUIRED_LOCK= argument at %L must be a scalar LOGICAL "
10046 "variable", &code
->expr4
->where
);
10048 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
10049 && !gfc_check_vardef_context (code
->expr4
, false, false, false,
10050 _("ACQUIRED_LOCK variable")))
10053 /* Check for EVENT WAIT the UNTIL_COUNT. */
10054 if (code
->op
== EXEC_EVENT_WAIT
&& code
->expr4
)
10056 if (!gfc_resolve_expr (code
->expr4
) || code
->expr4
->ts
.type
!= BT_INTEGER
10057 || code
->expr4
->rank
!= 0)
10058 gfc_error ("UNTIL_COUNT= argument at %L must be a scalar INTEGER "
10059 "expression", &code
->expr4
->where
);
10065 resolve_critical (gfc_code
*code
)
10067 gfc_symtree
*symtree
;
10068 gfc_symbol
*lock_type
;
10069 char name
[GFC_MAX_SYMBOL_LEN
];
10070 static int serial
= 0;
10072 if (flag_coarray
!= GFC_FCOARRAY_LIB
)
10075 symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
10076 GFC_PREFIX ("lock_type"));
10078 lock_type
= symtree
->n
.sym
;
10081 if (gfc_get_sym_tree (GFC_PREFIX ("lock_type"), gfc_current_ns
, &symtree
,
10083 gcc_unreachable ();
10084 lock_type
= symtree
->n
.sym
;
10085 lock_type
->attr
.flavor
= FL_DERIVED
;
10086 lock_type
->attr
.zero_comp
= 1;
10087 lock_type
->from_intmod
= INTMOD_ISO_FORTRAN_ENV
;
10088 lock_type
->intmod_sym_id
= ISOFORTRAN_LOCK_TYPE
;
10091 sprintf(name
, GFC_PREFIX ("lock_var") "%d",serial
++);
10092 if (gfc_get_sym_tree (name
, gfc_current_ns
, &symtree
, false) != 0)
10093 gcc_unreachable ();
10095 code
->resolved_sym
= symtree
->n
.sym
;
10096 symtree
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
10097 symtree
->n
.sym
->attr
.referenced
= 1;
10098 symtree
->n
.sym
->attr
.artificial
= 1;
10099 symtree
->n
.sym
->attr
.codimension
= 1;
10100 symtree
->n
.sym
->ts
.type
= BT_DERIVED
;
10101 symtree
->n
.sym
->ts
.u
.derived
= lock_type
;
10102 symtree
->n
.sym
->as
= gfc_get_array_spec ();
10103 symtree
->n
.sym
->as
->corank
= 1;
10104 symtree
->n
.sym
->as
->type
= AS_EXPLICIT
;
10105 symtree
->n
.sym
->as
->cotype
= AS_EXPLICIT
;
10106 symtree
->n
.sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
,
10108 gfc_commit_symbols();
10113 resolve_sync (gfc_code
*code
)
10115 /* Check imageset. The * case matches expr1 == NULL. */
10118 if (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
> 1)
10119 gfc_error ("Imageset argument at %L must be a scalar or rank-1 "
10120 "INTEGER expression", &code
->expr1
->where
);
10121 if (code
->expr1
->expr_type
== EXPR_CONSTANT
&& code
->expr1
->rank
== 0
10122 && mpz_cmp_si (code
->expr1
->value
.integer
, 1) < 0)
10123 gfc_error ("Imageset argument at %L must between 1 and num_images()",
10124 &code
->expr1
->where
);
10125 else if (code
->expr1
->expr_type
== EXPR_ARRAY
10126 && gfc_simplify_expr (code
->expr1
, 0))
10128 gfc_constructor
*cons
;
10129 cons
= gfc_constructor_first (code
->expr1
->value
.constructor
);
10130 for (; cons
; cons
= gfc_constructor_next (cons
))
10131 if (cons
->expr
->expr_type
== EXPR_CONSTANT
10132 && mpz_cmp_si (cons
->expr
->value
.integer
, 1) < 0)
10133 gfc_error ("Imageset argument at %L must between 1 and "
10134 "num_images()", &cons
->expr
->where
);
10139 gfc_resolve_expr (code
->expr2
);
10141 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
10142 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
10143 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
10144 &code
->expr2
->where
);
10146 /* Check ERRMSG. */
10147 gfc_resolve_expr (code
->expr3
);
10149 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
10150 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
10151 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
10152 &code
->expr3
->where
);
10156 /* Given a branch to a label, see if the branch is conforming.
10157 The code node describes where the branch is located. */
10160 resolve_branch (gfc_st_label
*label
, gfc_code
*code
)
10167 /* Step one: is this a valid branching target? */
10169 if (label
->defined
== ST_LABEL_UNKNOWN
)
10171 gfc_error ("Label %d referenced at %L is never defined", label
->value
,
10176 if (label
->defined
!= ST_LABEL_TARGET
&& label
->defined
!= ST_LABEL_DO_TARGET
)
10178 gfc_error ("Statement at %L is not a valid branch target statement "
10179 "for the branch statement at %L", &label
->where
, &code
->loc
);
10183 /* Step two: make sure this branch is not a branch to itself ;-) */
10185 if (code
->here
== label
)
10188 "Branch at %L may result in an infinite loop", &code
->loc
);
10192 /* Step three: See if the label is in the same block as the
10193 branching statement. The hard work has been done by setting up
10194 the bitmap reachable_labels. */
10196 if (bitmap_bit_p (cs_base
->reachable_labels
, label
->value
))
10198 /* Check now whether there is a CRITICAL construct; if so, check
10199 whether the label is still visible outside of the CRITICAL block,
10200 which is invalid. */
10201 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
10203 if (stack
->current
->op
== EXEC_CRITICAL
10204 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
10205 gfc_error ("GOTO statement at %L leaves CRITICAL construct for "
10206 "label at %L", &code
->loc
, &label
->where
);
10207 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
10208 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
10209 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct "
10210 "for label at %L", &code
->loc
, &label
->where
);
10216 /* Step four: If we haven't found the label in the bitmap, it may
10217 still be the label of the END of the enclosing block, in which
10218 case we find it by going up the code_stack. */
10220 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
10222 if (stack
->current
->next
&& stack
->current
->next
->here
== label
)
10224 if (stack
->current
->op
== EXEC_CRITICAL
)
10226 /* Note: A label at END CRITICAL does not leave the CRITICAL
10227 construct as END CRITICAL is still part of it. */
10228 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
10229 " at %L", &code
->loc
, &label
->where
);
10232 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
)
10234 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct for "
10235 "label at %L", &code
->loc
, &label
->where
);
10242 gcc_assert (stack
->current
->next
->op
== EXEC_END_NESTED_BLOCK
);
10246 /* The label is not in an enclosing block, so illegal. This was
10247 allowed in Fortran 66, so we allow it as extension. No
10248 further checks are necessary in this case. */
10249 gfc_notify_std (GFC_STD_LEGACY
, "Label at %L is not in the same block "
10250 "as the GOTO statement at %L", &label
->where
,
10256 /* Check whether EXPR1 has the same shape as EXPR2. */
10259 resolve_where_shape (gfc_expr
*expr1
, gfc_expr
*expr2
)
10261 mpz_t shape
[GFC_MAX_DIMENSIONS
];
10262 mpz_t shape2
[GFC_MAX_DIMENSIONS
];
10263 bool result
= false;
10266 /* Compare the rank. */
10267 if (expr1
->rank
!= expr2
->rank
)
10270 /* Compare the size of each dimension. */
10271 for (i
=0; i
<expr1
->rank
; i
++)
10273 if (!gfc_array_dimen_size (expr1
, i
, &shape
[i
]))
10276 if (!gfc_array_dimen_size (expr2
, i
, &shape2
[i
]))
10279 if (mpz_cmp (shape
[i
], shape2
[i
]))
10283 /* When either of the two expression is an assumed size array, we
10284 ignore the comparison of dimension sizes. */
10289 gfc_clear_shape (shape
, i
);
10290 gfc_clear_shape (shape2
, i
);
10295 /* Check whether a WHERE assignment target or a WHERE mask expression
10296 has the same shape as the outmost WHERE mask expression. */
10299 resolve_where (gfc_code
*code
, gfc_expr
*mask
)
10303 gfc_expr
*e
= NULL
;
10305 cblock
= code
->block
;
10307 /* Store the first WHERE mask-expr of the WHERE statement or construct.
10308 In case of nested WHERE, only the outmost one is stored. */
10309 if (mask
== NULL
) /* outmost WHERE */
10311 else /* inner WHERE */
10318 /* Check if the mask-expr has a consistent shape with the
10319 outmost WHERE mask-expr. */
10320 if (!resolve_where_shape (cblock
->expr1
, e
))
10321 gfc_error ("WHERE mask at %L has inconsistent shape",
10322 &cblock
->expr1
->where
);
10325 /* the assignment statement of a WHERE statement, or the first
10326 statement in where-body-construct of a WHERE construct */
10327 cnext
= cblock
->next
;
10332 /* WHERE assignment statement */
10335 /* Check shape consistent for WHERE assignment target. */
10336 if (e
&& !resolve_where_shape (cnext
->expr1
, e
))
10337 gfc_error ("WHERE assignment target at %L has "
10338 "inconsistent shape", &cnext
->expr1
->where
);
10342 case EXEC_ASSIGN_CALL
:
10343 resolve_call (cnext
);
10344 if (!cnext
->resolved_sym
->attr
.elemental
)
10345 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
10346 &cnext
->ext
.actual
->expr
->where
);
10349 /* WHERE or WHERE construct is part of a where-body-construct */
10351 resolve_where (cnext
, e
);
10355 gfc_error ("Unsupported statement inside WHERE at %L",
10358 /* the next statement within the same where-body-construct */
10359 cnext
= cnext
->next
;
10361 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
10362 cblock
= cblock
->block
;
10367 /* Resolve assignment in FORALL construct.
10368 NVAR is the number of FORALL index variables, and VAR_EXPR records the
10369 FORALL index variables. */
10372 gfc_resolve_assign_in_forall (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
10376 for (n
= 0; n
< nvar
; n
++)
10378 gfc_symbol
*forall_index
;
10380 forall_index
= var_expr
[n
]->symtree
->n
.sym
;
10382 /* Check whether the assignment target is one of the FORALL index
10384 if ((code
->expr1
->expr_type
== EXPR_VARIABLE
)
10385 && (code
->expr1
->symtree
->n
.sym
== forall_index
))
10386 gfc_error ("Assignment to a FORALL index variable at %L",
10387 &code
->expr1
->where
);
10390 /* If one of the FORALL index variables doesn't appear in the
10391 assignment variable, then there could be a many-to-one
10392 assignment. Emit a warning rather than an error because the
10393 mask could be resolving this problem. */
10394 if (!find_forall_index (code
->expr1
, forall_index
, 0))
10395 gfc_warning (0, "The FORALL with index %qs is not used on the "
10396 "left side of the assignment at %L and so might "
10397 "cause multiple assignment to this object",
10398 var_expr
[n
]->symtree
->name
, &code
->expr1
->where
);
10404 /* Resolve WHERE statement in FORALL construct. */
10407 gfc_resolve_where_code_in_forall (gfc_code
*code
, int nvar
,
10408 gfc_expr
**var_expr
)
10413 cblock
= code
->block
;
10416 /* the assignment statement of a WHERE statement, or the first
10417 statement in where-body-construct of a WHERE construct */
10418 cnext
= cblock
->next
;
10423 /* WHERE assignment statement */
10425 gfc_resolve_assign_in_forall (cnext
, nvar
, var_expr
);
10428 /* WHERE operator assignment statement */
10429 case EXEC_ASSIGN_CALL
:
10430 resolve_call (cnext
);
10431 if (!cnext
->resolved_sym
->attr
.elemental
)
10432 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
10433 &cnext
->ext
.actual
->expr
->where
);
10436 /* WHERE or WHERE construct is part of a where-body-construct */
10438 gfc_resolve_where_code_in_forall (cnext
, nvar
, var_expr
);
10442 gfc_error ("Unsupported statement inside WHERE at %L",
10445 /* the next statement within the same where-body-construct */
10446 cnext
= cnext
->next
;
10448 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
10449 cblock
= cblock
->block
;
10454 /* Traverse the FORALL body to check whether the following errors exist:
10455 1. For assignment, check if a many-to-one assignment happens.
10456 2. For WHERE statement, check the WHERE body to see if there is any
10457 many-to-one assignment. */
10460 gfc_resolve_forall_body (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
10464 c
= code
->block
->next
;
10470 case EXEC_POINTER_ASSIGN
:
10471 gfc_resolve_assign_in_forall (c
, nvar
, var_expr
);
10474 case EXEC_ASSIGN_CALL
:
10478 /* Because the gfc_resolve_blocks() will handle the nested FORALL,
10479 there is no need to handle it here. */
10483 gfc_resolve_where_code_in_forall(c
, nvar
, var_expr
);
10488 /* The next statement in the FORALL body. */
10494 /* Counts the number of iterators needed inside a forall construct, including
10495 nested forall constructs. This is used to allocate the needed memory
10496 in gfc_resolve_forall. */
10499 gfc_count_forall_iterators (gfc_code
*code
)
10501 int max_iters
, sub_iters
, current_iters
;
10502 gfc_forall_iterator
*fa
;
10504 gcc_assert(code
->op
== EXEC_FORALL
);
10508 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10511 code
= code
->block
->next
;
10515 if (code
->op
== EXEC_FORALL
)
10517 sub_iters
= gfc_count_forall_iterators (code
);
10518 if (sub_iters
> max_iters
)
10519 max_iters
= sub_iters
;
10524 return current_iters
+ max_iters
;
10528 /* Given a FORALL construct, first resolve the FORALL iterator, then call
10529 gfc_resolve_forall_body to resolve the FORALL body. */
10532 gfc_resolve_forall (gfc_code
*code
, gfc_namespace
*ns
, int forall_save
)
10534 static gfc_expr
**var_expr
;
10535 static int total_var
= 0;
10536 static int nvar
= 0;
10537 int i
, old_nvar
, tmp
;
10538 gfc_forall_iterator
*fa
;
10542 if (!gfc_notify_std (GFC_STD_F2018_OBS
, "FORALL construct at %L", &code
->loc
))
10545 /* Start to resolve a FORALL construct */
10546 if (forall_save
== 0)
10548 /* Count the total number of FORALL indices in the nested FORALL
10549 construct in order to allocate the VAR_EXPR with proper size. */
10550 total_var
= gfc_count_forall_iterators (code
);
10552 /* Allocate VAR_EXPR with NUMBER_OF_FORALL_INDEX elements. */
10553 var_expr
= XCNEWVEC (gfc_expr
*, total_var
);
10556 /* The information about FORALL iterator, including FORALL indices start, end
10557 and stride. An outer FORALL indice cannot appear in start, end or stride. */
10558 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10560 /* Fortran 20008: C738 (R753). */
10561 if (fa
->var
->ref
&& fa
->var
->ref
->type
== REF_ARRAY
)
10563 gfc_error ("FORALL index-name at %L must be a scalar variable "
10564 "of type integer", &fa
->var
->where
);
10568 /* Check if any outer FORALL index name is the same as the current
10570 for (i
= 0; i
< nvar
; i
++)
10572 if (fa
->var
->symtree
->n
.sym
== var_expr
[i
]->symtree
->n
.sym
)
10573 gfc_error ("An outer FORALL construct already has an index "
10574 "with this name %L", &fa
->var
->where
);
10577 /* Record the current FORALL index. */
10578 var_expr
[nvar
] = gfc_copy_expr (fa
->var
);
10582 /* No memory leak. */
10583 gcc_assert (nvar
<= total_var
);
10586 /* Resolve the FORALL body. */
10587 gfc_resolve_forall_body (code
, nvar
, var_expr
);
10589 /* May call gfc_resolve_forall to resolve the inner FORALL loop. */
10590 gfc_resolve_blocks (code
->block
, ns
);
10594 /* Free only the VAR_EXPRs allocated in this frame. */
10595 for (i
= nvar
; i
< tmp
; i
++)
10596 gfc_free_expr (var_expr
[i
]);
10600 /* We are in the outermost FORALL construct. */
10601 gcc_assert (forall_save
== 0);
10603 /* VAR_EXPR is not needed any more. */
10610 /* Resolve a BLOCK construct statement. */
10613 resolve_block_construct (gfc_code
* code
)
10615 /* Resolve the BLOCK's namespace. */
10616 gfc_resolve (code
->ext
.block
.ns
);
10618 /* For an ASSOCIATE block, the associations (and their targets) are already
10619 resolved during resolve_symbol. */
10623 /* Resolve lists of blocks found in IF, SELECT CASE, WHERE, FORALL, GOTO and
10627 gfc_resolve_blocks (gfc_code
*b
, gfc_namespace
*ns
)
10631 for (; b
; b
= b
->block
)
10633 t
= gfc_resolve_expr (b
->expr1
);
10634 if (!gfc_resolve_expr (b
->expr2
))
10640 if (t
&& b
->expr1
!= NULL
10641 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
!= 0))
10642 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
10648 && b
->expr1
!= NULL
10649 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
== 0))
10650 gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
10655 resolve_branch (b
->label1
, b
);
10659 resolve_block_construct (b
);
10663 case EXEC_SELECT_TYPE
:
10664 case EXEC_SELECT_RANK
:
10667 case EXEC_DO_WHILE
:
10668 case EXEC_DO_CONCURRENT
:
10669 case EXEC_CRITICAL
:
10672 case EXEC_IOLENGTH
:
10676 case EXEC_OMP_ATOMIC
:
10677 case EXEC_OACC_ATOMIC
:
10679 gfc_omp_atomic_op aop
10680 = (gfc_omp_atomic_op
) (b
->ext
.omp_atomic
& GFC_OMP_ATOMIC_MASK
);
10682 /* Verify this before calling gfc_resolve_code, which might
10684 gcc_assert (b
->next
&& b
->next
->op
== EXEC_ASSIGN
);
10685 gcc_assert (((aop
!= GFC_OMP_ATOMIC_CAPTURE
)
10686 && b
->next
->next
== NULL
)
10687 || ((aop
== GFC_OMP_ATOMIC_CAPTURE
)
10688 && b
->next
->next
!= NULL
10689 && b
->next
->next
->op
== EXEC_ASSIGN
10690 && b
->next
->next
->next
== NULL
));
10694 case EXEC_OACC_PARALLEL_LOOP
:
10695 case EXEC_OACC_PARALLEL
:
10696 case EXEC_OACC_KERNELS_LOOP
:
10697 case EXEC_OACC_KERNELS
:
10698 case EXEC_OACC_SERIAL_LOOP
:
10699 case EXEC_OACC_SERIAL
:
10700 case EXEC_OACC_DATA
:
10701 case EXEC_OACC_HOST_DATA
:
10702 case EXEC_OACC_LOOP
:
10703 case EXEC_OACC_UPDATE
:
10704 case EXEC_OACC_WAIT
:
10705 case EXEC_OACC_CACHE
:
10706 case EXEC_OACC_ENTER_DATA
:
10707 case EXEC_OACC_EXIT_DATA
:
10708 case EXEC_OACC_ROUTINE
:
10709 case EXEC_OMP_CRITICAL
:
10710 case EXEC_OMP_DISTRIBUTE
:
10711 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
10712 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
10713 case EXEC_OMP_DISTRIBUTE_SIMD
:
10715 case EXEC_OMP_DO_SIMD
:
10716 case EXEC_OMP_MASTER
:
10717 case EXEC_OMP_ORDERED
:
10718 case EXEC_OMP_PARALLEL
:
10719 case EXEC_OMP_PARALLEL_DO
:
10720 case EXEC_OMP_PARALLEL_DO_SIMD
:
10721 case EXEC_OMP_PARALLEL_SECTIONS
:
10722 case EXEC_OMP_PARALLEL_WORKSHARE
:
10723 case EXEC_OMP_SECTIONS
:
10724 case EXEC_OMP_SIMD
:
10725 case EXEC_OMP_SINGLE
:
10726 case EXEC_OMP_TARGET
:
10727 case EXEC_OMP_TARGET_DATA
:
10728 case EXEC_OMP_TARGET_ENTER_DATA
:
10729 case EXEC_OMP_TARGET_EXIT_DATA
:
10730 case EXEC_OMP_TARGET_PARALLEL
:
10731 case EXEC_OMP_TARGET_PARALLEL_DO
:
10732 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
10733 case EXEC_OMP_TARGET_SIMD
:
10734 case EXEC_OMP_TARGET_TEAMS
:
10735 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
10736 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10737 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10738 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
10739 case EXEC_OMP_TARGET_UPDATE
:
10740 case EXEC_OMP_TASK
:
10741 case EXEC_OMP_TASKGROUP
:
10742 case EXEC_OMP_TASKLOOP
:
10743 case EXEC_OMP_TASKLOOP_SIMD
:
10744 case EXEC_OMP_TASKWAIT
:
10745 case EXEC_OMP_TASKYIELD
:
10746 case EXEC_OMP_TEAMS
:
10747 case EXEC_OMP_TEAMS_DISTRIBUTE
:
10748 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10749 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10750 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
10751 case EXEC_OMP_WORKSHARE
:
10755 gfc_internal_error ("gfc_resolve_blocks(): Bad block type");
10758 gfc_resolve_code (b
->next
, ns
);
10763 /* Does everything to resolve an ordinary assignment. Returns true
10764 if this is an interface assignment. */
10766 resolve_ordinary_assign (gfc_code
*code
, gfc_namespace
*ns
)
10773 symbol_attribute attr
;
10775 if (gfc_extend_assign (code
, ns
))
10779 if (code
->op
== EXEC_ASSIGN_CALL
)
10781 lhs
= code
->ext
.actual
->expr
;
10782 rhsptr
= &code
->ext
.actual
->next
->expr
;
10786 gfc_actual_arglist
* args
;
10787 gfc_typebound_proc
* tbp
;
10789 gcc_assert (code
->op
== EXEC_COMPCALL
);
10791 args
= code
->expr1
->value
.compcall
.actual
;
10793 rhsptr
= &args
->next
->expr
;
10795 tbp
= code
->expr1
->value
.compcall
.tbp
;
10796 gcc_assert (!tbp
->is_generic
);
10799 /* Make a temporary rhs when there is a default initializer
10800 and rhs is the same symbol as the lhs. */
10801 if ((*rhsptr
)->expr_type
== EXPR_VARIABLE
10802 && (*rhsptr
)->symtree
->n
.sym
->ts
.type
== BT_DERIVED
10803 && gfc_has_default_initializer ((*rhsptr
)->symtree
->n
.sym
->ts
.u
.derived
)
10804 && (lhs
->symtree
->n
.sym
== (*rhsptr
)->symtree
->n
.sym
))
10805 *rhsptr
= gfc_get_parentheses (*rhsptr
);
10813 if ((gfc_numeric_ts (&lhs
->ts
) || lhs
->ts
.type
== BT_LOGICAL
)
10814 && rhs
->ts
.type
== BT_CHARACTER
10815 && (rhs
->expr_type
!= EXPR_CONSTANT
|| !flag_dec_char_conversions
))
10817 /* Use of -fdec-char-conversions allows assignment of character data
10818 to non-character variables. This not permited for nonconstant
10820 gfc_error ("Cannot convert %s to %s at %L", gfc_typename (rhs
),
10821 gfc_typename (lhs
), &rhs
->where
);
10825 /* Handle the case of a BOZ literal on the RHS. */
10826 if (rhs
->ts
.type
== BT_BOZ
)
10828 if (gfc_invalid_boz ("BOZ literal constant at %L is neither a DATA "
10829 "statement value nor an actual argument of "
10830 "INT/REAL/DBLE/CMPLX intrinsic subprogram",
10834 switch (lhs
->ts
.type
)
10837 if (!gfc_boz2int (rhs
, lhs
->ts
.kind
))
10841 if (!gfc_boz2real (rhs
, lhs
->ts
.kind
))
10845 gfc_error ("Invalid use of BOZ literal constant at %L", &rhs
->where
);
10850 if (lhs
->ts
.type
== BT_CHARACTER
&& warn_character_truncation
)
10852 HOST_WIDE_INT llen
= 0, rlen
= 0;
10853 if (lhs
->ts
.u
.cl
!= NULL
10854 && lhs
->ts
.u
.cl
->length
!= NULL
10855 && lhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10856 llen
= gfc_mpz_get_hwi (lhs
->ts
.u
.cl
->length
->value
.integer
);
10858 if (rhs
->expr_type
== EXPR_CONSTANT
)
10859 rlen
= rhs
->value
.character
.length
;
10861 else if (rhs
->ts
.u
.cl
!= NULL
10862 && rhs
->ts
.u
.cl
->length
!= NULL
10863 && rhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10864 rlen
= gfc_mpz_get_hwi (rhs
->ts
.u
.cl
->length
->value
.integer
);
10866 if (rlen
&& llen
&& rlen
> llen
)
10867 gfc_warning_now (OPT_Wcharacter_truncation
,
10868 "CHARACTER expression will be truncated "
10869 "in assignment (%ld/%ld) at %L",
10870 (long) llen
, (long) rlen
, &code
->loc
);
10873 /* Ensure that a vector index expression for the lvalue is evaluated
10874 to a temporary if the lvalue symbol is referenced in it. */
10877 for (ref
= lhs
->ref
; ref
; ref
= ref
->next
)
10878 if (ref
->type
== REF_ARRAY
)
10880 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
10881 if (ref
->u
.ar
.dimen_type
[n
] == DIMEN_VECTOR
10882 && gfc_find_sym_in_expr (lhs
->symtree
->n
.sym
,
10883 ref
->u
.ar
.start
[n
]))
10885 = gfc_get_parentheses (ref
->u
.ar
.start
[n
]);
10889 if (gfc_pure (NULL
))
10891 if (lhs
->ts
.type
== BT_DERIVED
10892 && lhs
->expr_type
== EXPR_VARIABLE
10893 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10894 && rhs
->expr_type
== EXPR_VARIABLE
10895 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10896 || gfc_is_coindexed (rhs
)))
10898 /* F2008, C1283. */
10899 if (gfc_is_coindexed (rhs
))
10900 gfc_error ("Coindexed expression at %L is assigned to "
10901 "a derived type variable with a POINTER "
10902 "component in a PURE procedure",
10905 /* F2008, C1283 (4). */
10906 gfc_error ("In a pure subprogram an INTENT(IN) dummy argument "
10907 "shall not be used as the expr at %L of an intrinsic "
10908 "assignment statement in which the variable is of a "
10909 "derived type if the derived type has a pointer "
10910 "component at any level of component selection.",
10915 /* Fortran 2008, C1283. */
10916 if (gfc_is_coindexed (lhs
))
10918 gfc_error ("Assignment to coindexed variable at %L in a PURE "
10919 "procedure", &rhs
->where
);
10924 if (gfc_implicit_pure (NULL
))
10926 if (lhs
->expr_type
== EXPR_VARIABLE
10927 && lhs
->symtree
->n
.sym
!= gfc_current_ns
->proc_name
10928 && lhs
->symtree
->n
.sym
->ns
!= gfc_current_ns
)
10929 gfc_unset_implicit_pure (NULL
);
10931 if (lhs
->ts
.type
== BT_DERIVED
10932 && lhs
->expr_type
== EXPR_VARIABLE
10933 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10934 && rhs
->expr_type
== EXPR_VARIABLE
10935 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10936 || gfc_is_coindexed (rhs
)))
10937 gfc_unset_implicit_pure (NULL
);
10939 /* Fortran 2008, C1283. */
10940 if (gfc_is_coindexed (lhs
))
10941 gfc_unset_implicit_pure (NULL
);
10944 /* F2008, 7.2.1.2. */
10945 attr
= gfc_expr_attr (lhs
);
10946 if (lhs
->ts
.type
== BT_CLASS
&& attr
.allocatable
)
10948 if (attr
.codimension
)
10950 gfc_error ("Assignment to polymorphic coarray at %L is not "
10951 "permitted", &lhs
->where
);
10954 if (!gfc_notify_std (GFC_STD_F2008
, "Assignment to an allocatable "
10955 "polymorphic variable at %L", &lhs
->where
))
10957 if (!flag_realloc_lhs
)
10959 gfc_error ("Assignment to an allocatable polymorphic variable at %L "
10960 "requires %<-frealloc-lhs%>", &lhs
->where
);
10964 else if (lhs
->ts
.type
== BT_CLASS
)
10966 gfc_error ("Nonallocatable variable must not be polymorphic in intrinsic "
10967 "assignment at %L - check that there is a matching specific "
10968 "subroutine for '=' operator", &lhs
->where
);
10972 bool lhs_coindexed
= gfc_is_coindexed (lhs
);
10974 /* F2008, Section 7.2.1.2. */
10975 if (lhs_coindexed
&& gfc_has_ultimate_allocatable (lhs
))
10977 gfc_error ("Coindexed variable must not have an allocatable ultimate "
10978 "component in assignment at %L", &lhs
->where
);
10982 /* Assign the 'data' of a class object to a derived type. */
10983 if (lhs
->ts
.type
== BT_DERIVED
10984 && rhs
->ts
.type
== BT_CLASS
10985 && rhs
->expr_type
!= EXPR_ARRAY
)
10986 gfc_add_data_component (rhs
);
10988 /* Make sure there is a vtable and, in particular, a _copy for the
10990 if (UNLIMITED_POLY (lhs
) && lhs
->rank
&& rhs
->ts
.type
!= BT_CLASS
)
10991 gfc_find_vtab (&rhs
->ts
);
10993 bool caf_convert_to_send
= flag_coarray
== GFC_FCOARRAY_LIB
10995 || (code
->expr2
->expr_type
== EXPR_FUNCTION
10996 && code
->expr2
->value
.function
.isym
10997 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
10998 && (code
->expr1
->rank
== 0 || code
->expr2
->rank
!= 0)
10999 && !gfc_expr_attr (rhs
).allocatable
11000 && !gfc_has_vector_subscript (rhs
)));
11002 gfc_check_assign (lhs
, rhs
, 1, !caf_convert_to_send
);
11004 /* Insert a GFC_ISYM_CAF_SEND intrinsic, when the LHS is a coindexed variable.
11005 Additionally, insert this code when the RHS is a CAF as we then use the
11006 GFC_ISYM_CAF_SEND intrinsic just to avoid a temporary; but do not do so if
11007 the LHS is (re)allocatable or has a vector subscript. If the LHS is a
11008 noncoindexed array and the RHS is a coindexed scalar, use the normal code
11010 if (caf_convert_to_send
)
11012 if (code
->expr2
->expr_type
== EXPR_FUNCTION
11013 && code
->expr2
->value
.function
.isym
11014 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
11015 remove_caf_get_intrinsic (code
->expr2
);
11016 code
->op
= EXEC_CALL
;
11017 gfc_get_sym_tree (GFC_PREFIX ("caf_send"), ns
, &code
->symtree
, true);
11018 code
->resolved_sym
= code
->symtree
->n
.sym
;
11019 code
->resolved_sym
->attr
.flavor
= FL_PROCEDURE
;
11020 code
->resolved_sym
->attr
.intrinsic
= 1;
11021 code
->resolved_sym
->attr
.subroutine
= 1;
11022 code
->resolved_isym
= gfc_intrinsic_subroutine_by_id (GFC_ISYM_CAF_SEND
);
11023 gfc_commit_symbol (code
->resolved_sym
);
11024 code
->ext
.actual
= gfc_get_actual_arglist ();
11025 code
->ext
.actual
->expr
= lhs
;
11026 code
->ext
.actual
->next
= gfc_get_actual_arglist ();
11027 code
->ext
.actual
->next
->expr
= rhs
;
11028 code
->expr1
= NULL
;
11029 code
->expr2
= NULL
;
11036 /* Add a component reference onto an expression. */
11039 add_comp_ref (gfc_expr
*e
, gfc_component
*c
)
11044 ref
= &((*ref
)->next
);
11045 *ref
= gfc_get_ref ();
11046 (*ref
)->type
= REF_COMPONENT
;
11047 (*ref
)->u
.c
.sym
= e
->ts
.u
.derived
;
11048 (*ref
)->u
.c
.component
= c
;
11051 /* Add a full array ref, as necessary. */
11054 gfc_add_full_array_ref (e
, c
->as
);
11055 e
->rank
= c
->as
->rank
;
11060 /* Build an assignment. Keep the argument 'op' for future use, so that
11061 pointer assignments can be made. */
11064 build_assignment (gfc_exec_op op
, gfc_expr
*expr1
, gfc_expr
*expr2
,
11065 gfc_component
*comp1
, gfc_component
*comp2
, locus loc
)
11067 gfc_code
*this_code
;
11069 this_code
= gfc_get_code (op
);
11070 this_code
->next
= NULL
;
11071 this_code
->expr1
= gfc_copy_expr (expr1
);
11072 this_code
->expr2
= gfc_copy_expr (expr2
);
11073 this_code
->loc
= loc
;
11074 if (comp1
&& comp2
)
11076 add_comp_ref (this_code
->expr1
, comp1
);
11077 add_comp_ref (this_code
->expr2
, comp2
);
11084 /* Makes a temporary variable expression based on the characteristics of
11085 a given variable expression. */
11088 get_temp_from_expr (gfc_expr
*e
, gfc_namespace
*ns
)
11090 static int serial
= 0;
11091 char name
[GFC_MAX_SYMBOL_LEN
];
11093 gfc_array_spec
*as
;
11094 gfc_array_ref
*aref
;
11097 sprintf (name
, GFC_PREFIX("DA%d"), serial
++);
11098 gfc_get_sym_tree (name
, ns
, &tmp
, false);
11099 gfc_add_type (tmp
->n
.sym
, &e
->ts
, NULL
);
11101 if (e
->expr_type
== EXPR_CONSTANT
&& e
->ts
.type
== BT_CHARACTER
)
11102 tmp
->n
.sym
->ts
.u
.cl
->length
= gfc_get_int_expr (gfc_charlen_int_kind
,
11104 e
->value
.character
.length
);
11110 /* Obtain the arrayspec for the temporary. */
11111 if (e
->rank
&& e
->expr_type
!= EXPR_ARRAY
11112 && e
->expr_type
!= EXPR_FUNCTION
11113 && e
->expr_type
!= EXPR_OP
)
11115 aref
= gfc_find_array_ref (e
);
11116 if (e
->expr_type
== EXPR_VARIABLE
11117 && e
->symtree
->n
.sym
->as
== aref
->as
)
11121 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
11122 if (ref
->type
== REF_COMPONENT
11123 && ref
->u
.c
.component
->as
== aref
->as
)
11131 /* Add the attributes and the arrayspec to the temporary. */
11132 tmp
->n
.sym
->attr
= gfc_expr_attr (e
);
11133 tmp
->n
.sym
->attr
.function
= 0;
11134 tmp
->n
.sym
->attr
.result
= 0;
11135 tmp
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
11136 tmp
->n
.sym
->attr
.dummy
= 0;
11137 tmp
->n
.sym
->attr
.intent
= INTENT_UNKNOWN
;
11141 tmp
->n
.sym
->as
= gfc_copy_array_spec (as
);
11144 if (as
->type
== AS_DEFERRED
)
11145 tmp
->n
.sym
->attr
.allocatable
= 1;
11147 else if (e
->rank
&& (e
->expr_type
== EXPR_ARRAY
11148 || e
->expr_type
== EXPR_FUNCTION
11149 || e
->expr_type
== EXPR_OP
))
11151 tmp
->n
.sym
->as
= gfc_get_array_spec ();
11152 tmp
->n
.sym
->as
->type
= AS_DEFERRED
;
11153 tmp
->n
.sym
->as
->rank
= e
->rank
;
11154 tmp
->n
.sym
->attr
.allocatable
= 1;
11155 tmp
->n
.sym
->attr
.dimension
= 1;
11158 tmp
->n
.sym
->attr
.dimension
= 0;
11160 gfc_set_sym_referenced (tmp
->n
.sym
);
11161 gfc_commit_symbol (tmp
->n
.sym
);
11162 e
= gfc_lval_expr_from_sym (tmp
->n
.sym
);
11164 /* Should the lhs be a section, use its array ref for the
11165 temporary expression. */
11166 if (aref
&& aref
->type
!= AR_FULL
)
11168 gfc_free_ref_list (e
->ref
);
11169 e
->ref
= gfc_copy_ref (ref
);
11175 /* Add one line of code to the code chain, making sure that 'head' and
11176 'tail' are appropriately updated. */
11179 add_code_to_chain (gfc_code
**this_code
, gfc_code
**head
, gfc_code
**tail
)
11181 gcc_assert (this_code
);
11183 *head
= *tail
= *this_code
;
11185 *tail
= gfc_append_code (*tail
, *this_code
);
11190 /* Counts the potential number of part array references that would
11191 result from resolution of typebound defined assignments. */
11194 nonscalar_typebound_assign (gfc_symbol
*derived
, int depth
)
11197 int c_depth
= 0, t_depth
;
11199 for (c
= derived
->components
; c
; c
= c
->next
)
11201 if ((!gfc_bt_struct (c
->ts
.type
)
11203 || c
->attr
.allocatable
11204 || c
->attr
.proc_pointer_comp
11205 || c
->attr
.class_pointer
11206 || c
->attr
.proc_pointer
)
11207 && !c
->attr
.defined_assign_comp
)
11210 if (c
->as
&& c_depth
== 0)
11213 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
11214 t_depth
= nonscalar_typebound_assign (c
->ts
.u
.derived
,
11219 c_depth
= t_depth
> c_depth
? t_depth
: c_depth
;
11221 return depth
+ c_depth
;
11225 /* Implement 7.2.1.3 of the F08 standard:
11226 "An intrinsic assignment where the variable is of derived type is
11227 performed as if each component of the variable were assigned from the
11228 corresponding component of expr using pointer assignment (7.2.2) for
11229 each pointer component, defined assignment for each nonpointer
11230 nonallocatable component of a type that has a type-bound defined
11231 assignment consistent with the component, intrinsic assignment for
11232 each other nonpointer nonallocatable component, ..."
11234 The pointer assignments are taken care of by the intrinsic
11235 assignment of the structure itself. This function recursively adds
11236 defined assignments where required. The recursion is accomplished
11237 by calling gfc_resolve_code.
11239 When the lhs in a defined assignment has intent INOUT, we need a
11240 temporary for the lhs. In pseudo-code:
11242 ! Only call function lhs once.
11243 if (lhs is not a constant or an variable)
11246 ! Do the intrinsic assignment
11248 ! Now do the defined assignments
11249 do over components with typebound defined assignment [%cmp]
11250 #if one component's assignment procedure is INOUT
11252 #if expr2 non-variable
11258 t1%cmp {defined=} expr2%cmp
11264 expr1%cmp {defined=} expr2%cmp
11268 /* The temporary assignments have to be put on top of the additional
11269 code to avoid the result being changed by the intrinsic assignment.
11271 static int component_assignment_level
= 0;
11272 static gfc_code
*tmp_head
= NULL
, *tmp_tail
= NULL
;
11275 generate_component_assignments (gfc_code
**code
, gfc_namespace
*ns
)
11277 gfc_component
*comp1
, *comp2
;
11278 gfc_code
*this_code
= NULL
, *head
= NULL
, *tail
= NULL
;
11280 int error_count
, depth
;
11282 gfc_get_errors (NULL
, &error_count
);
11284 /* Filter out continuing processing after an error. */
11286 || (*code
)->expr1
->ts
.type
!= BT_DERIVED
11287 || (*code
)->expr2
->ts
.type
!= BT_DERIVED
)
11290 /* TODO: Handle more than one part array reference in assignments. */
11291 depth
= nonscalar_typebound_assign ((*code
)->expr1
->ts
.u
.derived
,
11292 (*code
)->expr1
->rank
? 1 : 0);
11295 gfc_warning (0, "TODO: type-bound defined assignment(s) at %L not "
11296 "done because multiple part array references would "
11297 "occur in intermediate expressions.", &(*code
)->loc
);
11301 component_assignment_level
++;
11303 /* Create a temporary so that functions get called only once. */
11304 if ((*code
)->expr2
->expr_type
!= EXPR_VARIABLE
11305 && (*code
)->expr2
->expr_type
!= EXPR_CONSTANT
)
11307 gfc_expr
*tmp_expr
;
11309 /* Assign the rhs to the temporary. */
11310 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11311 this_code
= build_assignment (EXEC_ASSIGN
,
11312 tmp_expr
, (*code
)->expr2
,
11313 NULL
, NULL
, (*code
)->loc
);
11314 /* Add the code and substitute the rhs expression. */
11315 add_code_to_chain (&this_code
, &tmp_head
, &tmp_tail
);
11316 gfc_free_expr ((*code
)->expr2
);
11317 (*code
)->expr2
= tmp_expr
;
11320 /* Do the intrinsic assignment. This is not needed if the lhs is one
11321 of the temporaries generated here, since the intrinsic assignment
11322 to the final result already does this. */
11323 if ((*code
)->expr1
->symtree
->n
.sym
->name
[2] != '@')
11325 this_code
= build_assignment (EXEC_ASSIGN
,
11326 (*code
)->expr1
, (*code
)->expr2
,
11327 NULL
, NULL
, (*code
)->loc
);
11328 add_code_to_chain (&this_code
, &head
, &tail
);
11331 comp1
= (*code
)->expr1
->ts
.u
.derived
->components
;
11332 comp2
= (*code
)->expr2
->ts
.u
.derived
->components
;
11335 for (; comp1
; comp1
= comp1
->next
, comp2
= comp2
->next
)
11337 bool inout
= false;
11339 /* The intrinsic assignment does the right thing for pointers
11340 of all kinds and allocatable components. */
11341 if (!gfc_bt_struct (comp1
->ts
.type
)
11342 || comp1
->attr
.pointer
11343 || comp1
->attr
.allocatable
11344 || comp1
->attr
.proc_pointer_comp
11345 || comp1
->attr
.class_pointer
11346 || comp1
->attr
.proc_pointer
)
11349 /* Make an assigment for this component. */
11350 this_code
= build_assignment (EXEC_ASSIGN
,
11351 (*code
)->expr1
, (*code
)->expr2
,
11352 comp1
, comp2
, (*code
)->loc
);
11354 /* Convert the assignment if there is a defined assignment for
11355 this type. Otherwise, using the call from gfc_resolve_code,
11356 recurse into its components. */
11357 gfc_resolve_code (this_code
, ns
);
11359 if (this_code
->op
== EXEC_ASSIGN_CALL
)
11361 gfc_formal_arglist
*dummy_args
;
11363 /* Check that there is a typebound defined assignment. If not,
11364 then this must be a module defined assignment. We cannot
11365 use the defined_assign_comp attribute here because it must
11366 be this derived type that has the defined assignment and not
11368 if (!(comp1
->ts
.u
.derived
->f2k_derived
11369 && comp1
->ts
.u
.derived
->f2k_derived
11370 ->tb_op
[INTRINSIC_ASSIGN
]))
11372 gfc_free_statements (this_code
);
11377 /* If the first argument of the subroutine has intent INOUT
11378 a temporary must be generated and used instead. */
11379 rsym
= this_code
->resolved_sym
;
11380 dummy_args
= gfc_sym_get_dummy_args (rsym
);
11382 && dummy_args
->sym
->attr
.intent
== INTENT_INOUT
)
11384 gfc_code
*temp_code
;
11387 /* Build the temporary required for the assignment and put
11388 it at the head of the generated code. */
11391 t1
= get_temp_from_expr ((*code
)->expr1
, ns
);
11392 temp_code
= build_assignment (EXEC_ASSIGN
,
11393 t1
, (*code
)->expr1
,
11394 NULL
, NULL
, (*code
)->loc
);
11396 /* For allocatable LHS, check whether it is allocated. Note
11397 that allocatable components with defined assignment are
11398 not yet support. See PR 57696. */
11399 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
)
11403 gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11404 block
= gfc_get_code (EXEC_IF
);
11405 block
->block
= gfc_get_code (EXEC_IF
);
11406 block
->block
->expr1
11407 = gfc_build_intrinsic_call (ns
,
11408 GFC_ISYM_ALLOCATED
, "allocated",
11409 (*code
)->loc
, 1, e
);
11410 block
->block
->next
= temp_code
;
11413 add_code_to_chain (&temp_code
, &tmp_head
, &tmp_tail
);
11416 /* Replace the first actual arg with the component of the
11418 gfc_free_expr (this_code
->ext
.actual
->expr
);
11419 this_code
->ext
.actual
->expr
= gfc_copy_expr (t1
);
11420 add_comp_ref (this_code
->ext
.actual
->expr
, comp1
);
11422 /* If the LHS variable is allocatable and wasn't allocated and
11423 the temporary is allocatable, pointer assign the address of
11424 the freshly allocated LHS to the temporary. */
11425 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
11426 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11431 cond
= gfc_get_expr ();
11432 cond
->ts
.type
= BT_LOGICAL
;
11433 cond
->ts
.kind
= gfc_default_logical_kind
;
11434 cond
->expr_type
= EXPR_OP
;
11435 cond
->where
= (*code
)->loc
;
11436 cond
->value
.op
.op
= INTRINSIC_NOT
;
11437 cond
->value
.op
.op1
= gfc_build_intrinsic_call (ns
,
11438 GFC_ISYM_ALLOCATED
, "allocated",
11439 (*code
)->loc
, 1, gfc_copy_expr (t1
));
11440 block
= gfc_get_code (EXEC_IF
);
11441 block
->block
= gfc_get_code (EXEC_IF
);
11442 block
->block
->expr1
= cond
;
11443 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11444 t1
, (*code
)->expr1
,
11445 NULL
, NULL
, (*code
)->loc
);
11446 add_code_to_chain (&block
, &head
, &tail
);
11450 else if (this_code
->op
== EXEC_ASSIGN
&& !this_code
->next
)
11452 /* Don't add intrinsic assignments since they are already
11453 effected by the intrinsic assignment of the structure. */
11454 gfc_free_statements (this_code
);
11459 add_code_to_chain (&this_code
, &head
, &tail
);
11463 /* Transfer the value to the final result. */
11464 this_code
= build_assignment (EXEC_ASSIGN
,
11465 (*code
)->expr1
, t1
,
11466 comp1
, comp2
, (*code
)->loc
);
11467 add_code_to_chain (&this_code
, &head
, &tail
);
11471 /* Put the temporary assignments at the top of the generated code. */
11472 if (tmp_head
&& component_assignment_level
== 1)
11474 gfc_append_code (tmp_head
, head
);
11476 tmp_head
= tmp_tail
= NULL
;
11479 // If we did a pointer assignment - thus, we need to ensure that the LHS is
11480 // not accidentally deallocated. Hence, nullify t1.
11481 if (t1
&& (*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
11482 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11488 e
= gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11489 cond
= gfc_build_intrinsic_call (ns
, GFC_ISYM_ASSOCIATED
, "associated",
11490 (*code
)->loc
, 2, gfc_copy_expr (t1
), e
);
11491 block
= gfc_get_code (EXEC_IF
);
11492 block
->block
= gfc_get_code (EXEC_IF
);
11493 block
->block
->expr1
= cond
;
11494 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11495 t1
, gfc_get_null_expr (&(*code
)->loc
),
11496 NULL
, NULL
, (*code
)->loc
);
11497 gfc_append_code (tail
, block
);
11501 /* Now attach the remaining code chain to the input code. Step on
11502 to the end of the new code since resolution is complete. */
11503 gcc_assert ((*code
)->op
== EXEC_ASSIGN
);
11504 tail
->next
= (*code
)->next
;
11505 /* Overwrite 'code' because this would place the intrinsic assignment
11506 before the temporary for the lhs is created. */
11507 gfc_free_expr ((*code
)->expr1
);
11508 gfc_free_expr ((*code
)->expr2
);
11514 component_assignment_level
--;
11518 /* F2008: Pointer function assignments are of the form:
11519 ptr_fcn (args) = expr
11520 This function breaks these assignments into two statements:
11521 temporary_pointer => ptr_fcn(args)
11522 temporary_pointer = expr */
11525 resolve_ptr_fcn_assign (gfc_code
**code
, gfc_namespace
*ns
)
11527 gfc_expr
*tmp_ptr_expr
;
11528 gfc_code
*this_code
;
11529 gfc_component
*comp
;
11532 if ((*code
)->expr1
->expr_type
!= EXPR_FUNCTION
)
11535 /* Even if standard does not support this feature, continue to build
11536 the two statements to avoid upsetting frontend_passes.c. */
11537 gfc_notify_std (GFC_STD_F2008
, "Pointer procedure assignment at "
11538 "%L", &(*code
)->loc
);
11540 comp
= gfc_get_proc_ptr_comp ((*code
)->expr1
);
11543 s
= comp
->ts
.interface
;
11545 s
= (*code
)->expr1
->symtree
->n
.sym
;
11547 if (s
== NULL
|| !s
->result
->attr
.pointer
)
11549 gfc_error ("The function result on the lhs of the assignment at "
11550 "%L must have the pointer attribute.",
11551 &(*code
)->expr1
->where
);
11552 (*code
)->op
= EXEC_NOP
;
11556 tmp_ptr_expr
= get_temp_from_expr ((*code
)->expr2
, ns
);
11558 /* get_temp_from_expression is set up for ordinary assignments. To that
11559 end, where array bounds are not known, arrays are made allocatable.
11560 Change the temporary to a pointer here. */
11561 tmp_ptr_expr
->symtree
->n
.sym
->attr
.pointer
= 1;
11562 tmp_ptr_expr
->symtree
->n
.sym
->attr
.allocatable
= 0;
11563 tmp_ptr_expr
->where
= (*code
)->loc
;
11565 this_code
= build_assignment (EXEC_ASSIGN
,
11566 tmp_ptr_expr
, (*code
)->expr2
,
11567 NULL
, NULL
, (*code
)->loc
);
11568 this_code
->next
= (*code
)->next
;
11569 (*code
)->next
= this_code
;
11570 (*code
)->op
= EXEC_POINTER_ASSIGN
;
11571 (*code
)->expr2
= (*code
)->expr1
;
11572 (*code
)->expr1
= tmp_ptr_expr
;
11578 /* Deferred character length assignments from an operator expression
11579 require a temporary because the character length of the lhs can
11580 change in the course of the assignment. */
11583 deferred_op_assign (gfc_code
**code
, gfc_namespace
*ns
)
11585 gfc_expr
*tmp_expr
;
11586 gfc_code
*this_code
;
11588 if (!((*code
)->expr1
->ts
.type
== BT_CHARACTER
11589 && (*code
)->expr1
->ts
.deferred
&& (*code
)->expr1
->rank
11590 && (*code
)->expr2
->expr_type
== EXPR_OP
))
11593 if (!gfc_check_dependency ((*code
)->expr1
, (*code
)->expr2
, 1))
11596 if (gfc_expr_attr ((*code
)->expr1
).pointer
)
11599 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11600 tmp_expr
->where
= (*code
)->loc
;
11602 /* A new charlen is required to ensure that the variable string
11603 length is different to that of the original lhs. */
11604 tmp_expr
->ts
.u
.cl
= gfc_get_charlen();
11605 tmp_expr
->symtree
->n
.sym
->ts
.u
.cl
= tmp_expr
->ts
.u
.cl
;
11606 tmp_expr
->ts
.u
.cl
->next
= (*code
)->expr2
->ts
.u
.cl
->next
;
11607 (*code
)->expr2
->ts
.u
.cl
->next
= tmp_expr
->ts
.u
.cl
;
11609 tmp_expr
->symtree
->n
.sym
->ts
.deferred
= 1;
11611 this_code
= build_assignment (EXEC_ASSIGN
,
11613 gfc_copy_expr (tmp_expr
),
11614 NULL
, NULL
, (*code
)->loc
);
11616 (*code
)->expr1
= tmp_expr
;
11618 this_code
->next
= (*code
)->next
;
11619 (*code
)->next
= this_code
;
11625 /* Given a block of code, recursively resolve everything pointed to by this
11629 gfc_resolve_code (gfc_code
*code
, gfc_namespace
*ns
)
11631 int omp_workshare_save
;
11632 int forall_save
, do_concurrent_save
;
11636 frame
.prev
= cs_base
;
11640 find_reachable_labels (code
);
11642 for (; code
; code
= code
->next
)
11644 frame
.current
= code
;
11645 forall_save
= forall_flag
;
11646 do_concurrent_save
= gfc_do_concurrent_flag
;
11648 if (code
->op
== EXEC_FORALL
)
11651 gfc_resolve_forall (code
, ns
, forall_save
);
11654 else if (code
->block
)
11656 omp_workshare_save
= -1;
11659 case EXEC_OACC_PARALLEL_LOOP
:
11660 case EXEC_OACC_PARALLEL
:
11661 case EXEC_OACC_KERNELS_LOOP
:
11662 case EXEC_OACC_KERNELS
:
11663 case EXEC_OACC_SERIAL_LOOP
:
11664 case EXEC_OACC_SERIAL
:
11665 case EXEC_OACC_DATA
:
11666 case EXEC_OACC_HOST_DATA
:
11667 case EXEC_OACC_LOOP
:
11668 gfc_resolve_oacc_blocks (code
, ns
);
11670 case EXEC_OMP_PARALLEL_WORKSHARE
:
11671 omp_workshare_save
= omp_workshare_flag
;
11672 omp_workshare_flag
= 1;
11673 gfc_resolve_omp_parallel_blocks (code
, ns
);
11675 case EXEC_OMP_PARALLEL
:
11676 case EXEC_OMP_PARALLEL_DO
:
11677 case EXEC_OMP_PARALLEL_DO_SIMD
:
11678 case EXEC_OMP_PARALLEL_SECTIONS
:
11679 case EXEC_OMP_TARGET_PARALLEL
:
11680 case EXEC_OMP_TARGET_PARALLEL_DO
:
11681 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11682 case EXEC_OMP_TARGET_TEAMS
:
11683 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11684 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11685 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11686 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11687 case EXEC_OMP_TASK
:
11688 case EXEC_OMP_TASKLOOP
:
11689 case EXEC_OMP_TASKLOOP_SIMD
:
11690 case EXEC_OMP_TEAMS
:
11691 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11692 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11693 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11694 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11695 omp_workshare_save
= omp_workshare_flag
;
11696 omp_workshare_flag
= 0;
11697 gfc_resolve_omp_parallel_blocks (code
, ns
);
11699 case EXEC_OMP_DISTRIBUTE
:
11700 case EXEC_OMP_DISTRIBUTE_SIMD
:
11702 case EXEC_OMP_DO_SIMD
:
11703 case EXEC_OMP_SIMD
:
11704 case EXEC_OMP_TARGET_SIMD
:
11705 gfc_resolve_omp_do_blocks (code
, ns
);
11707 case EXEC_SELECT_TYPE
:
11708 /* Blocks are handled in resolve_select_type because we have
11709 to transform the SELECT TYPE into ASSOCIATE first. */
11711 case EXEC_DO_CONCURRENT
:
11712 gfc_do_concurrent_flag
= 1;
11713 gfc_resolve_blocks (code
->block
, ns
);
11714 gfc_do_concurrent_flag
= 2;
11716 case EXEC_OMP_WORKSHARE
:
11717 omp_workshare_save
= omp_workshare_flag
;
11718 omp_workshare_flag
= 1;
11721 gfc_resolve_blocks (code
->block
, ns
);
11725 if (omp_workshare_save
!= -1)
11726 omp_workshare_flag
= omp_workshare_save
;
11730 if (code
->op
!= EXEC_COMPCALL
&& code
->op
!= EXEC_CALL_PPC
)
11731 t
= gfc_resolve_expr (code
->expr1
);
11732 forall_flag
= forall_save
;
11733 gfc_do_concurrent_flag
= do_concurrent_save
;
11735 if (!gfc_resolve_expr (code
->expr2
))
11738 if (code
->op
== EXEC_ALLOCATE
11739 && !gfc_resolve_expr (code
->expr3
))
11745 case EXEC_END_BLOCK
:
11746 case EXEC_END_NESTED_BLOCK
:
11750 case EXEC_ERROR_STOP
:
11752 case EXEC_CONTINUE
:
11754 case EXEC_ASSIGN_CALL
:
11757 case EXEC_CRITICAL
:
11758 resolve_critical (code
);
11761 case EXEC_SYNC_ALL
:
11762 case EXEC_SYNC_IMAGES
:
11763 case EXEC_SYNC_MEMORY
:
11764 resolve_sync (code
);
11769 case EXEC_EVENT_POST
:
11770 case EXEC_EVENT_WAIT
:
11771 resolve_lock_unlock_event (code
);
11774 case EXEC_FAIL_IMAGE
:
11775 case EXEC_FORM_TEAM
:
11776 case EXEC_CHANGE_TEAM
:
11777 case EXEC_END_TEAM
:
11778 case EXEC_SYNC_TEAM
:
11782 /* Keep track of which entry we are up to. */
11783 current_entry_id
= code
->ext
.entry
->id
;
11787 resolve_where (code
, NULL
);
11791 if (code
->expr1
!= NULL
)
11793 if (code
->expr1
->ts
.type
!= BT_INTEGER
)
11794 gfc_error ("ASSIGNED GOTO statement at %L requires an "
11795 "INTEGER variable", &code
->expr1
->where
);
11796 else if (code
->expr1
->symtree
->n
.sym
->attr
.assign
!= 1)
11797 gfc_error ("Variable %qs has not been assigned a target "
11798 "label at %L", code
->expr1
->symtree
->n
.sym
->name
,
11799 &code
->expr1
->where
);
11802 resolve_branch (code
->label1
, code
);
11806 if (code
->expr1
!= NULL
11807 && (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
))
11808 gfc_error ("Alternate RETURN statement at %L requires a SCALAR-"
11809 "INTEGER return specifier", &code
->expr1
->where
);
11812 case EXEC_INIT_ASSIGN
:
11813 case EXEC_END_PROCEDURE
:
11820 /* Remove a GFC_ISYM_CAF_GET inserted for a coindexed variable on
11822 if (code
->expr1
->expr_type
== EXPR_FUNCTION
11823 && code
->expr1
->value
.function
.isym
11824 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
11825 remove_caf_get_intrinsic (code
->expr1
);
11827 /* If this is a pointer function in an lvalue variable context,
11828 the new code will have to be resolved afresh. This is also the
11829 case with an error, where the code is transformed into NOP to
11830 prevent ICEs downstream. */
11831 if (resolve_ptr_fcn_assign (&code
, ns
)
11832 || code
->op
== EXEC_NOP
)
11835 if (!gfc_check_vardef_context (code
->expr1
, false, false, false,
11839 if (resolve_ordinary_assign (code
, ns
))
11841 if (code
->op
== EXEC_COMPCALL
)
11847 /* Check for dependencies in deferred character length array
11848 assignments and generate a temporary, if necessary. */
11849 if (code
->op
== EXEC_ASSIGN
&& deferred_op_assign (&code
, ns
))
11852 /* F03 7.4.1.3 for non-allocatable, non-pointer components. */
11853 if (code
->op
!= EXEC_CALL
&& code
->expr1
->ts
.type
== BT_DERIVED
11854 && code
->expr1
->ts
.u
.derived
11855 && code
->expr1
->ts
.u
.derived
->attr
.defined_assign_comp
)
11856 generate_component_assignments (&code
, ns
);
11860 case EXEC_LABEL_ASSIGN
:
11861 if (code
->label1
->defined
== ST_LABEL_UNKNOWN
)
11862 gfc_error ("Label %d referenced at %L is never defined",
11863 code
->label1
->value
, &code
->label1
->where
);
11865 && (code
->expr1
->expr_type
!= EXPR_VARIABLE
11866 || code
->expr1
->symtree
->n
.sym
->ts
.type
!= BT_INTEGER
11867 || code
->expr1
->symtree
->n
.sym
->ts
.kind
11868 != gfc_default_integer_kind
11869 || code
->expr1
->symtree
->n
.sym
->as
!= NULL
))
11870 gfc_error ("ASSIGN statement at %L requires a scalar "
11871 "default INTEGER variable", &code
->expr1
->where
);
11874 case EXEC_POINTER_ASSIGN
:
11881 /* This is both a variable definition and pointer assignment
11882 context, so check both of them. For rank remapping, a final
11883 array ref may be present on the LHS and fool gfc_expr_attr
11884 used in gfc_check_vardef_context. Remove it. */
11885 e
= remove_last_array_ref (code
->expr1
);
11886 t
= gfc_check_vardef_context (e
, true, false, false,
11887 _("pointer assignment"));
11889 t
= gfc_check_vardef_context (e
, false, false, false,
11890 _("pointer assignment"));
11893 t
= gfc_check_pointer_assign (code
->expr1
, code
->expr2
, !t
) && t
;
11898 /* Assigning a class object always is a regular assign. */
11899 if (code
->expr2
->ts
.type
== BT_CLASS
11900 && code
->expr1
->ts
.type
== BT_CLASS
11901 && !CLASS_DATA (code
->expr2
)->attr
.dimension
11902 && !(gfc_expr_attr (code
->expr1
).proc_pointer
11903 && code
->expr2
->expr_type
== EXPR_VARIABLE
11904 && code
->expr2
->symtree
->n
.sym
->attr
.flavor
11906 code
->op
= EXEC_ASSIGN
;
11910 case EXEC_ARITHMETIC_IF
:
11912 gfc_expr
*e
= code
->expr1
;
11914 gfc_resolve_expr (e
);
11915 if (e
->expr_type
== EXPR_NULL
)
11916 gfc_error ("Invalid NULL at %L", &e
->where
);
11918 if (t
&& (e
->rank
> 0
11919 || !(e
->ts
.type
== BT_REAL
|| e
->ts
.type
== BT_INTEGER
)))
11920 gfc_error ("Arithmetic IF statement at %L requires a scalar "
11921 "REAL or INTEGER expression", &e
->where
);
11923 resolve_branch (code
->label1
, code
);
11924 resolve_branch (code
->label2
, code
);
11925 resolve_branch (code
->label3
, code
);
11930 if (t
&& code
->expr1
!= NULL
11931 && (code
->expr1
->ts
.type
!= BT_LOGICAL
11932 || code
->expr1
->rank
!= 0))
11933 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
11934 &code
->expr1
->where
);
11939 resolve_call (code
);
11942 case EXEC_COMPCALL
:
11944 resolve_typebound_subroutine (code
);
11947 case EXEC_CALL_PPC
:
11948 resolve_ppc_call (code
);
11952 /* Select is complicated. Also, a SELECT construct could be
11953 a transformed computed GOTO. */
11954 resolve_select (code
, false);
11957 case EXEC_SELECT_TYPE
:
11958 resolve_select_type (code
, ns
);
11961 case EXEC_SELECT_RANK
:
11962 resolve_select_rank (code
, ns
);
11966 resolve_block_construct (code
);
11970 if (code
->ext
.iterator
!= NULL
)
11972 gfc_iterator
*iter
= code
->ext
.iterator
;
11973 if (gfc_resolve_iterator (iter
, true, false))
11974 gfc_resolve_do_iterator (code
, iter
->var
->symtree
->n
.sym
,
11979 case EXEC_DO_WHILE
:
11980 if (code
->expr1
== NULL
)
11981 gfc_internal_error ("gfc_resolve_code(): No expression on "
11984 && (code
->expr1
->rank
!= 0
11985 || code
->expr1
->ts
.type
!= BT_LOGICAL
))
11986 gfc_error ("Exit condition of DO WHILE loop at %L must be "
11987 "a scalar LOGICAL expression", &code
->expr1
->where
);
11990 case EXEC_ALLOCATE
:
11992 resolve_allocate_deallocate (code
, "ALLOCATE");
11996 case EXEC_DEALLOCATE
:
11998 resolve_allocate_deallocate (code
, "DEALLOCATE");
12003 if (!gfc_resolve_open (code
->ext
.open
, &code
->loc
))
12006 resolve_branch (code
->ext
.open
->err
, code
);
12010 if (!gfc_resolve_close (code
->ext
.close
, &code
->loc
))
12013 resolve_branch (code
->ext
.close
->err
, code
);
12016 case EXEC_BACKSPACE
:
12020 if (!gfc_resolve_filepos (code
->ext
.filepos
, &code
->loc
))
12023 resolve_branch (code
->ext
.filepos
->err
, code
);
12027 if (!gfc_resolve_inquire (code
->ext
.inquire
))
12030 resolve_branch (code
->ext
.inquire
->err
, code
);
12033 case EXEC_IOLENGTH
:
12034 gcc_assert (code
->ext
.inquire
!= NULL
);
12035 if (!gfc_resolve_inquire (code
->ext
.inquire
))
12038 resolve_branch (code
->ext
.inquire
->err
, code
);
12042 if (!gfc_resolve_wait (code
->ext
.wait
))
12045 resolve_branch (code
->ext
.wait
->err
, code
);
12046 resolve_branch (code
->ext
.wait
->end
, code
);
12047 resolve_branch (code
->ext
.wait
->eor
, code
);
12052 if (!gfc_resolve_dt (code
, code
->ext
.dt
, &code
->loc
))
12055 resolve_branch (code
->ext
.dt
->err
, code
);
12056 resolve_branch (code
->ext
.dt
->end
, code
);
12057 resolve_branch (code
->ext
.dt
->eor
, code
);
12060 case EXEC_TRANSFER
:
12061 resolve_transfer (code
);
12064 case EXEC_DO_CONCURRENT
:
12066 resolve_forall_iterators (code
->ext
.forall_iterator
);
12068 if (code
->expr1
!= NULL
12069 && (code
->expr1
->ts
.type
!= BT_LOGICAL
|| code
->expr1
->rank
))
12070 gfc_error ("FORALL mask clause at %L requires a scalar LOGICAL "
12071 "expression", &code
->expr1
->where
);
12074 case EXEC_OACC_PARALLEL_LOOP
:
12075 case EXEC_OACC_PARALLEL
:
12076 case EXEC_OACC_KERNELS_LOOP
:
12077 case EXEC_OACC_KERNELS
:
12078 case EXEC_OACC_SERIAL_LOOP
:
12079 case EXEC_OACC_SERIAL
:
12080 case EXEC_OACC_DATA
:
12081 case EXEC_OACC_HOST_DATA
:
12082 case EXEC_OACC_LOOP
:
12083 case EXEC_OACC_UPDATE
:
12084 case EXEC_OACC_WAIT
:
12085 case EXEC_OACC_CACHE
:
12086 case EXEC_OACC_ENTER_DATA
:
12087 case EXEC_OACC_EXIT_DATA
:
12088 case EXEC_OACC_ATOMIC
:
12089 case EXEC_OACC_DECLARE
:
12090 gfc_resolve_oacc_directive (code
, ns
);
12093 case EXEC_OMP_ATOMIC
:
12094 case EXEC_OMP_BARRIER
:
12095 case EXEC_OMP_CANCEL
:
12096 case EXEC_OMP_CANCELLATION_POINT
:
12097 case EXEC_OMP_CRITICAL
:
12098 case EXEC_OMP_FLUSH
:
12099 case EXEC_OMP_DISTRIBUTE
:
12100 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
12101 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
12102 case EXEC_OMP_DISTRIBUTE_SIMD
:
12104 case EXEC_OMP_DO_SIMD
:
12105 case EXEC_OMP_MASTER
:
12106 case EXEC_OMP_ORDERED
:
12107 case EXEC_OMP_SECTIONS
:
12108 case EXEC_OMP_SIMD
:
12109 case EXEC_OMP_SINGLE
:
12110 case EXEC_OMP_TARGET
:
12111 case EXEC_OMP_TARGET_DATA
:
12112 case EXEC_OMP_TARGET_ENTER_DATA
:
12113 case EXEC_OMP_TARGET_EXIT_DATA
:
12114 case EXEC_OMP_TARGET_PARALLEL
:
12115 case EXEC_OMP_TARGET_PARALLEL_DO
:
12116 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
12117 case EXEC_OMP_TARGET_SIMD
:
12118 case EXEC_OMP_TARGET_TEAMS
:
12119 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
12120 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
12121 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
12122 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
12123 case EXEC_OMP_TARGET_UPDATE
:
12124 case EXEC_OMP_TASK
:
12125 case EXEC_OMP_TASKGROUP
:
12126 case EXEC_OMP_TASKLOOP
:
12127 case EXEC_OMP_TASKLOOP_SIMD
:
12128 case EXEC_OMP_TASKWAIT
:
12129 case EXEC_OMP_TASKYIELD
:
12130 case EXEC_OMP_TEAMS
:
12131 case EXEC_OMP_TEAMS_DISTRIBUTE
:
12132 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
12133 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
12134 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
12135 case EXEC_OMP_WORKSHARE
:
12136 gfc_resolve_omp_directive (code
, ns
);
12139 case EXEC_OMP_PARALLEL
:
12140 case EXEC_OMP_PARALLEL_DO
:
12141 case EXEC_OMP_PARALLEL_DO_SIMD
:
12142 case EXEC_OMP_PARALLEL_SECTIONS
:
12143 case EXEC_OMP_PARALLEL_WORKSHARE
:
12144 omp_workshare_save
= omp_workshare_flag
;
12145 omp_workshare_flag
= 0;
12146 gfc_resolve_omp_directive (code
, ns
);
12147 omp_workshare_flag
= omp_workshare_save
;
12151 gfc_internal_error ("gfc_resolve_code(): Bad statement code");
12155 cs_base
= frame
.prev
;
12159 /* Resolve initial values and make sure they are compatible with
12163 resolve_values (gfc_symbol
*sym
)
12167 if (sym
->value
== NULL
)
12170 if (sym
->value
->expr_type
== EXPR_STRUCTURE
)
12171 t
= resolve_structure_cons (sym
->value
, 1);
12173 t
= gfc_resolve_expr (sym
->value
);
12178 gfc_check_assign_symbol (sym
, NULL
, sym
->value
);
12182 /* Verify any BIND(C) derived types in the namespace so we can report errors
12183 for them once, rather than for each variable declared of that type. */
12186 resolve_bind_c_derived_types (gfc_symbol
*derived_sym
)
12188 if (derived_sym
!= NULL
&& derived_sym
->attr
.flavor
== FL_DERIVED
12189 && derived_sym
->attr
.is_bind_c
== 1)
12190 verify_bind_c_derived_type (derived_sym
);
12196 /* Check the interfaces of DTIO procedures associated with derived
12197 type 'sym'. These procedures can either have typebound bindings or
12198 can appear in DTIO generic interfaces. */
12201 gfc_verify_DTIO_procedures (gfc_symbol
*sym
)
12203 if (!sym
|| sym
->attr
.flavor
!= FL_DERIVED
)
12206 gfc_check_dtio_interfaces (sym
);
12211 /* Verify that any binding labels used in a given namespace do not collide
12212 with the names or binding labels of any global symbols. Multiple INTERFACE
12213 for the same procedure are permitted. */
12216 gfc_verify_binding_labels (gfc_symbol
*sym
)
12219 const char *module
;
12221 if (!sym
|| !sym
->attr
.is_bind_c
|| sym
->attr
.is_iso_c
12222 || sym
->attr
.flavor
== FL_DERIVED
|| !sym
->binding_label
)
12225 gsym
= gfc_find_case_gsymbol (gfc_gsym_root
, sym
->binding_label
);
12228 module
= sym
->module
;
12229 else if (sym
->ns
&& sym
->ns
->proc_name
12230 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
12231 module
= sym
->ns
->proc_name
->name
;
12232 else if (sym
->ns
&& sym
->ns
->parent
12233 && sym
->ns
&& sym
->ns
->parent
->proc_name
12234 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12235 module
= sym
->ns
->parent
->proc_name
->name
;
12241 && (gsym
->type
== GSYM_FUNCTION
|| gsym
->type
== GSYM_SUBROUTINE
)))
12244 gsym
= gfc_get_gsymbol (sym
->binding_label
, true);
12245 gsym
->where
= sym
->declared_at
;
12246 gsym
->sym_name
= sym
->name
;
12247 gsym
->binding_label
= sym
->binding_label
;
12248 gsym
->ns
= sym
->ns
;
12249 gsym
->mod_name
= module
;
12250 if (sym
->attr
.function
)
12251 gsym
->type
= GSYM_FUNCTION
;
12252 else if (sym
->attr
.subroutine
)
12253 gsym
->type
= GSYM_SUBROUTINE
;
12254 /* Mark as variable/procedure as defined, unless its an INTERFACE. */
12255 gsym
->defined
= sym
->attr
.if_source
!= IFSRC_IFBODY
;
12259 if (sym
->attr
.flavor
== FL_VARIABLE
&& gsym
->type
!= GSYM_UNKNOWN
)
12261 gfc_error ("Variable %qs with binding label %qs at %L uses the same global "
12262 "identifier as entity at %L", sym
->name
,
12263 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
12264 /* Clear the binding label to prevent checking multiple times. */
12265 sym
->binding_label
= NULL
;
12269 if (sym
->attr
.flavor
== FL_VARIABLE
&& module
12270 && (strcmp (module
, gsym
->mod_name
) != 0
12271 || strcmp (sym
->name
, gsym
->sym_name
) != 0))
12273 /* This can only happen if the variable is defined in a module - if it
12274 isn't the same module, reject it. */
12275 gfc_error ("Variable %qs from module %qs with binding label %qs at %L "
12276 "uses the same global identifier as entity at %L from module %qs",
12277 sym
->name
, module
, sym
->binding_label
,
12278 &sym
->declared_at
, &gsym
->where
, gsym
->mod_name
);
12279 sym
->binding_label
= NULL
;
12283 if ((sym
->attr
.function
|| sym
->attr
.subroutine
)
12284 && ((gsym
->type
!= GSYM_SUBROUTINE
&& gsym
->type
!= GSYM_FUNCTION
)
12285 || (gsym
->defined
&& sym
->attr
.if_source
!= IFSRC_IFBODY
))
12286 && (sym
!= gsym
->ns
->proc_name
&& sym
->attr
.entry
== 0)
12287 && (module
!= gsym
->mod_name
12288 || strcmp (gsym
->sym_name
, sym
->name
) != 0
12289 || (module
&& strcmp (module
, gsym
->mod_name
) != 0)))
12291 /* Print an error if the procedure is defined multiple times; we have to
12292 exclude references to the same procedure via module association or
12293 multiple checks for the same procedure. */
12294 gfc_error ("Procedure %qs with binding label %qs at %L uses the same "
12295 "global identifier as entity at %L", sym
->name
,
12296 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
12297 sym
->binding_label
= NULL
;
12302 /* Resolve an index expression. */
12305 resolve_index_expr (gfc_expr
*e
)
12307 if (!gfc_resolve_expr (e
))
12310 if (!gfc_simplify_expr (e
, 0))
12313 if (!gfc_specification_expr (e
))
12320 /* Resolve a charlen structure. */
12323 resolve_charlen (gfc_charlen
*cl
)
12326 bool saved_specification_expr
;
12332 saved_specification_expr
= specification_expr
;
12333 specification_expr
= true;
12335 if (cl
->length_from_typespec
)
12337 if (!gfc_resolve_expr (cl
->length
))
12339 specification_expr
= saved_specification_expr
;
12343 if (!gfc_simplify_expr (cl
->length
, 0))
12345 specification_expr
= saved_specification_expr
;
12349 /* cl->length has been resolved. It should have an integer type. */
12350 if (cl
->length
->ts
.type
!= BT_INTEGER
)
12352 gfc_error ("Scalar INTEGER expression expected at %L",
12353 &cl
->length
->where
);
12359 if (!resolve_index_expr (cl
->length
))
12361 specification_expr
= saved_specification_expr
;
12366 /* F2008, 4.4.3.2: If the character length parameter value evaluates to
12367 a negative value, the length of character entities declared is zero. */
12368 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
12369 && mpz_sgn (cl
->length
->value
.integer
) < 0)
12370 gfc_replace_expr (cl
->length
,
12371 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 0));
12373 /* Check that the character length is not too large. */
12374 k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
12375 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
12376 && cl
->length
->ts
.type
== BT_INTEGER
12377 && mpz_cmp (cl
->length
->value
.integer
, gfc_integer_kinds
[k
].huge
) > 0)
12379 gfc_error ("String length at %L is too large", &cl
->length
->where
);
12380 specification_expr
= saved_specification_expr
;
12384 specification_expr
= saved_specification_expr
;
12389 /* Test for non-constant shape arrays. */
12392 is_non_constant_shape_array (gfc_symbol
*sym
)
12398 not_constant
= false;
12399 if (sym
->as
!= NULL
)
12401 /* Unfortunately, !gfc_is_compile_time_shape hits a legal case that
12402 has not been simplified; parameter array references. Do the
12403 simplification now. */
12404 for (i
= 0; i
< sym
->as
->rank
+ sym
->as
->corank
; i
++)
12406 if (i
== GFC_MAX_DIMENSIONS
)
12409 e
= sym
->as
->lower
[i
];
12410 if (e
&& (!resolve_index_expr(e
)
12411 || !gfc_is_constant_expr (e
)))
12412 not_constant
= true;
12413 e
= sym
->as
->upper
[i
];
12414 if (e
&& (!resolve_index_expr(e
)
12415 || !gfc_is_constant_expr (e
)))
12416 not_constant
= true;
12419 return not_constant
;
12422 /* Given a symbol and an initialization expression, add code to initialize
12423 the symbol to the function entry. */
12425 build_init_assign (gfc_symbol
*sym
, gfc_expr
*init
)
12429 gfc_namespace
*ns
= sym
->ns
;
12431 /* Search for the function namespace if this is a contained
12432 function without an explicit result. */
12433 if (sym
->attr
.function
&& sym
== sym
->result
12434 && sym
->name
!= sym
->ns
->proc_name
->name
)
12436 ns
= ns
->contained
;
12437 for (;ns
; ns
= ns
->sibling
)
12438 if (strcmp (ns
->proc_name
->name
, sym
->name
) == 0)
12444 gfc_free_expr (init
);
12448 /* Build an l-value expression for the result. */
12449 lval
= gfc_lval_expr_from_sym (sym
);
12451 /* Add the code at scope entry. */
12452 init_st
= gfc_get_code (EXEC_INIT_ASSIGN
);
12453 init_st
->next
= ns
->code
;
12454 ns
->code
= init_st
;
12456 /* Assign the default initializer to the l-value. */
12457 init_st
->loc
= sym
->declared_at
;
12458 init_st
->expr1
= lval
;
12459 init_st
->expr2
= init
;
12463 /* Whether or not we can generate a default initializer for a symbol. */
12466 can_generate_init (gfc_symbol
*sym
)
12468 symbol_attribute
*a
;
12473 /* These symbols should never have a default initialization. */
12478 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
12479 && (CLASS_DATA (sym
)->attr
.class_pointer
12480 || CLASS_DATA (sym
)->attr
.proc_pointer
))
12481 || a
->in_equivalence
12488 || (!a
->referenced
&& !a
->result
)
12489 || (a
->dummy
&& a
->intent
!= INTENT_OUT
)
12490 || (a
->function
&& sym
!= sym
->result
)
12495 /* Assign the default initializer to a derived type variable or result. */
12498 apply_default_init (gfc_symbol
*sym
)
12500 gfc_expr
*init
= NULL
;
12502 if (sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12505 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
)
12506 init
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12508 if (init
== NULL
&& sym
->ts
.type
!= BT_CLASS
)
12511 build_init_assign (sym
, init
);
12512 sym
->attr
.referenced
= 1;
12516 /* Build an initializer for a local. Returns null if the symbol should not have
12517 a default initialization. */
12520 build_default_init_expr (gfc_symbol
*sym
)
12522 /* These symbols should never have a default initialization. */
12523 if (sym
->attr
.allocatable
12524 || sym
->attr
.external
12526 || sym
->attr
.pointer
12527 || sym
->attr
.in_equivalence
12528 || sym
->attr
.in_common
12531 || sym
->attr
.cray_pointee
12532 || sym
->attr
.cray_pointer
12536 /* Get the appropriate init expression. */
12537 return gfc_build_default_init_expr (&sym
->ts
, &sym
->declared_at
);
12540 /* Add an initialization expression to a local variable. */
12542 apply_default_init_local (gfc_symbol
*sym
)
12544 gfc_expr
*init
= NULL
;
12546 /* The symbol should be a variable or a function return value. */
12547 if ((sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12548 || (sym
->attr
.function
&& sym
->result
!= sym
))
12551 /* Try to build the initializer expression. If we can't initialize
12552 this symbol, then init will be NULL. */
12553 init
= build_default_init_expr (sym
);
12557 /* For saved variables, we don't want to add an initializer at function
12558 entry, so we just add a static initializer. Note that automatic variables
12559 are stack allocated even with -fno-automatic; we have also to exclude
12560 result variable, which are also nonstatic. */
12561 if (!sym
->attr
.automatic
12562 && (sym
->attr
.save
|| sym
->ns
->save_all
12563 || (flag_max_stack_var_size
== 0 && !sym
->attr
.result
12564 && (sym
->ns
->proc_name
&& !sym
->ns
->proc_name
->attr
.recursive
)
12565 && (!sym
->attr
.dimension
|| !is_non_constant_shape_array (sym
)))))
12567 /* Don't clobber an existing initializer! */
12568 gcc_assert (sym
->value
== NULL
);
12573 build_init_assign (sym
, init
);
12577 /* Resolution of common features of flavors variable and procedure. */
12580 resolve_fl_var_and_proc (gfc_symbol
*sym
, int mp_flag
)
12582 gfc_array_spec
*as
;
12584 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12585 as
= CLASS_DATA (sym
)->as
;
12589 /* Constraints on deferred shape variable. */
12590 if (as
== NULL
|| as
->type
!= AS_DEFERRED
)
12592 bool pointer
, allocatable
, dimension
;
12594 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12596 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
12597 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
12598 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
12602 pointer
= sym
->attr
.pointer
&& !sym
->attr
.select_type_temporary
;
12603 allocatable
= sym
->attr
.allocatable
;
12604 dimension
= sym
->attr
.dimension
;
12609 if (dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12611 gfc_error ("Allocatable array %qs at %L must have a deferred "
12612 "shape or assumed rank", sym
->name
, &sym
->declared_at
);
12615 else if (!gfc_notify_std (GFC_STD_F2003
, "Scalar object "
12616 "%qs at %L may not be ALLOCATABLE",
12617 sym
->name
, &sym
->declared_at
))
12621 if (pointer
&& dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12623 gfc_error ("Array pointer %qs at %L must have a deferred shape or "
12624 "assumed rank", sym
->name
, &sym
->declared_at
);
12630 if (!mp_flag
&& !sym
->attr
.allocatable
&& !sym
->attr
.pointer
12631 && sym
->ts
.type
!= BT_CLASS
&& !sym
->assoc
)
12633 gfc_error ("Array %qs at %L cannot have a deferred shape",
12634 sym
->name
, &sym
->declared_at
);
12639 /* Constraints on polymorphic variables. */
12640 if (sym
->ts
.type
== BT_CLASS
&& !(sym
->result
&& sym
->result
!= sym
))
12643 if (sym
->attr
.class_ok
12644 && !sym
->attr
.select_type_temporary
12645 && !UNLIMITED_POLY (sym
)
12646 && !gfc_type_is_extensible (CLASS_DATA (sym
)->ts
.u
.derived
))
12648 gfc_error ("Type %qs of CLASS variable %qs at %L is not extensible",
12649 CLASS_DATA (sym
)->ts
.u
.derived
->name
, sym
->name
,
12650 &sym
->declared_at
);
12655 /* Assume that use associated symbols were checked in the module ns.
12656 Class-variables that are associate-names are also something special
12657 and excepted from the test. */
12658 if (!sym
->attr
.class_ok
&& !sym
->attr
.use_assoc
&& !sym
->assoc
)
12660 gfc_error ("CLASS variable %qs at %L must be dummy, allocatable "
12661 "or pointer", sym
->name
, &sym
->declared_at
);
12670 /* Additional checks for symbols with flavor variable and derived
12671 type. To be called from resolve_fl_variable. */
12674 resolve_fl_variable_derived (gfc_symbol
*sym
, int no_init_flag
)
12676 gcc_assert (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
);
12678 /* Check to see if a derived type is blocked from being host
12679 associated by the presence of another class I symbol in the same
12680 namespace. 14.6.1.3 of the standard and the discussion on
12681 comp.lang.fortran. */
12682 if (sym
->ns
!= sym
->ts
.u
.derived
->ns
12683 && !sym
->ts
.u
.derived
->attr
.use_assoc
12684 && sym
->ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
12687 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 0, &s
);
12688 if (s
&& s
->attr
.generic
)
12689 s
= gfc_find_dt_in_generic (s
);
12690 if (s
&& !gfc_fl_struct (s
->attr
.flavor
))
12692 gfc_error ("The type %qs cannot be host associated at %L "
12693 "because it is blocked by an incompatible object "
12694 "of the same name declared at %L",
12695 sym
->ts
.u
.derived
->name
, &sym
->declared_at
,
12701 /* 4th constraint in section 11.3: "If an object of a type for which
12702 component-initialization is specified (R429) appears in the
12703 specification-part of a module and does not have the ALLOCATABLE
12704 or POINTER attribute, the object shall have the SAVE attribute."
12706 The check for initializers is performed with
12707 gfc_has_default_initializer because gfc_default_initializer generates
12708 a hidden default for allocatable components. */
12709 if (!(sym
->value
|| no_init_flag
) && sym
->ns
->proc_name
12710 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12711 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
) && !sym
->attr
.save
12712 && !sym
->attr
.pointer
&& !sym
->attr
.allocatable
12713 && gfc_has_default_initializer (sym
->ts
.u
.derived
)
12714 && !gfc_notify_std (GFC_STD_F2008
, "Implied SAVE for module variable "
12715 "%qs at %L, needed due to the default "
12716 "initialization", sym
->name
, &sym
->declared_at
))
12719 /* Assign default initializer. */
12720 if (!(sym
->value
|| sym
->attr
.pointer
|| sym
->attr
.allocatable
)
12721 && (!no_init_flag
|| sym
->attr
.intent
== INTENT_OUT
))
12722 sym
->value
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12728 /* F2008, C402 (R401): A colon shall not be used as a type-param-value
12729 except in the declaration of an entity or component that has the POINTER
12730 or ALLOCATABLE attribute. */
12733 deferred_requirements (gfc_symbol
*sym
)
12735 if (sym
->ts
.deferred
12736 && !(sym
->attr
.pointer
12737 || sym
->attr
.allocatable
12738 || sym
->attr
.associate_var
12739 || sym
->attr
.omp_udr_artificial_var
))
12741 /* If a function has a result variable, only check the variable. */
12742 if (sym
->result
&& sym
->name
!= sym
->result
->name
)
12745 gfc_error ("Entity %qs at %L has a deferred type parameter and "
12746 "requires either the POINTER or ALLOCATABLE attribute",
12747 sym
->name
, &sym
->declared_at
);
12754 /* Resolve symbols with flavor variable. */
12757 resolve_fl_variable (gfc_symbol
*sym
, int mp_flag
)
12759 const char *auto_save_msg
= "Automatic object %qs at %L cannot have the "
12762 if (!resolve_fl_var_and_proc (sym
, mp_flag
))
12765 /* Set this flag to check that variables are parameters of all entries.
12766 This check is effected by the call to gfc_resolve_expr through
12767 is_non_constant_shape_array. */
12768 bool saved_specification_expr
= specification_expr
;
12769 specification_expr
= true;
12771 if (sym
->ns
->proc_name
12772 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12773 || sym
->ns
->proc_name
->attr
.is_main_program
)
12774 && !sym
->attr
.use_assoc
12775 && !sym
->attr
.allocatable
12776 && !sym
->attr
.pointer
12777 && is_non_constant_shape_array (sym
))
12779 /* F08:C541. The shape of an array defined in a main program or module
12780 * needs to be constant. */
12781 gfc_error ("The module or main program array %qs at %L must "
12782 "have constant shape", sym
->name
, &sym
->declared_at
);
12783 specification_expr
= saved_specification_expr
;
12787 /* Constraints on deferred type parameter. */
12788 if (!deferred_requirements (sym
))
12791 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.associate_var
)
12793 /* Make sure that character string variables with assumed length are
12794 dummy arguments. */
12795 gfc_expr
*e
= NULL
;
12798 e
= sym
->ts
.u
.cl
->length
;
12802 if (e
== NULL
&& !sym
->attr
.dummy
&& !sym
->attr
.result
12803 && !sym
->ts
.deferred
&& !sym
->attr
.select_type_temporary
12804 && !sym
->attr
.omp_udr_artificial_var
)
12806 gfc_error ("Entity with assumed character length at %L must be a "
12807 "dummy argument or a PARAMETER", &sym
->declared_at
);
12808 specification_expr
= saved_specification_expr
;
12812 if (e
&& sym
->attr
.save
== SAVE_EXPLICIT
&& !gfc_is_constant_expr (e
))
12814 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12815 specification_expr
= saved_specification_expr
;
12819 if (!gfc_is_constant_expr (e
)
12820 && !(e
->expr_type
== EXPR_VARIABLE
12821 && e
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
))
12823 if (!sym
->attr
.use_assoc
&& sym
->ns
->proc_name
12824 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12825 || sym
->ns
->proc_name
->attr
.is_main_program
))
12827 gfc_error ("%qs at %L must have constant character length "
12828 "in this context", sym
->name
, &sym
->declared_at
);
12829 specification_expr
= saved_specification_expr
;
12832 if (sym
->attr
.in_common
)
12834 gfc_error ("COMMON variable %qs at %L must have constant "
12835 "character length", sym
->name
, &sym
->declared_at
);
12836 specification_expr
= saved_specification_expr
;
12842 if (sym
->value
== NULL
&& sym
->attr
.referenced
)
12843 apply_default_init_local (sym
); /* Try to apply a default initialization. */
12845 /* Determine if the symbol may not have an initializer. */
12846 int no_init_flag
= 0, automatic_flag
= 0;
12847 if (sym
->attr
.allocatable
|| sym
->attr
.external
|| sym
->attr
.dummy
12848 || sym
->attr
.intrinsic
|| sym
->attr
.result
)
12850 else if ((sym
->attr
.dimension
|| sym
->attr
.codimension
) && !sym
->attr
.pointer
12851 && is_non_constant_shape_array (sym
))
12853 no_init_flag
= automatic_flag
= 1;
12855 /* Also, they must not have the SAVE attribute.
12856 SAVE_IMPLICIT is checked below. */
12857 if (sym
->as
&& sym
->attr
.codimension
)
12859 int corank
= sym
->as
->corank
;
12860 sym
->as
->corank
= 0;
12861 no_init_flag
= automatic_flag
= is_non_constant_shape_array (sym
);
12862 sym
->as
->corank
= corank
;
12864 if (automatic_flag
&& sym
->attr
.save
== SAVE_EXPLICIT
)
12866 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12867 specification_expr
= saved_specification_expr
;
12872 /* Ensure that any initializer is simplified. */
12874 gfc_simplify_expr (sym
->value
, 1);
12876 /* Reject illegal initializers. */
12877 if (!sym
->mark
&& sym
->value
)
12879 if (sym
->attr
.allocatable
|| (sym
->ts
.type
== BT_CLASS
12880 && CLASS_DATA (sym
)->attr
.allocatable
))
12881 gfc_error ("Allocatable %qs at %L cannot have an initializer",
12882 sym
->name
, &sym
->declared_at
);
12883 else if (sym
->attr
.external
)
12884 gfc_error ("External %qs at %L cannot have an initializer",
12885 sym
->name
, &sym
->declared_at
);
12886 else if (sym
->attr
.dummy
12887 && !(sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.intent
== INTENT_OUT
))
12888 gfc_error ("Dummy %qs at %L cannot have an initializer",
12889 sym
->name
, &sym
->declared_at
);
12890 else if (sym
->attr
.intrinsic
)
12891 gfc_error ("Intrinsic %qs at %L cannot have an initializer",
12892 sym
->name
, &sym
->declared_at
);
12893 else if (sym
->attr
.result
)
12894 gfc_error ("Function result %qs at %L cannot have an initializer",
12895 sym
->name
, &sym
->declared_at
);
12896 else if (automatic_flag
)
12897 gfc_error ("Automatic array %qs at %L cannot have an initializer",
12898 sym
->name
, &sym
->declared_at
);
12900 goto no_init_error
;
12901 specification_expr
= saved_specification_expr
;
12906 if (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
)
12908 bool res
= resolve_fl_variable_derived (sym
, no_init_flag
);
12909 specification_expr
= saved_specification_expr
;
12913 specification_expr
= saved_specification_expr
;
12918 /* Compare the dummy characteristics of a module procedure interface
12919 declaration with the corresponding declaration in a submodule. */
12920 static gfc_formal_arglist
*new_formal
;
12921 static char errmsg
[200];
12924 compare_fsyms (gfc_symbol
*sym
)
12928 if (sym
== NULL
|| new_formal
== NULL
)
12931 fsym
= new_formal
->sym
;
12936 if (strcmp (sym
->name
, fsym
->name
) == 0)
12938 if (!gfc_check_dummy_characteristics (fsym
, sym
, true, errmsg
, 200))
12939 gfc_error ("%s at %L", errmsg
, &fsym
->declared_at
);
12944 /* Resolve a procedure. */
12947 resolve_fl_procedure (gfc_symbol
*sym
, int mp_flag
)
12949 gfc_formal_arglist
*arg
;
12951 if (sym
->attr
.function
12952 && !resolve_fl_var_and_proc (sym
, mp_flag
))
12955 /* Constraints on deferred type parameter. */
12956 if (!deferred_requirements (sym
))
12959 if (sym
->ts
.type
== BT_CHARACTER
)
12961 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
12963 if (cl
&& cl
->length
&& gfc_is_constant_expr (cl
->length
)
12964 && !resolve_charlen (cl
))
12967 if ((!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
12968 && sym
->attr
.proc
== PROC_ST_FUNCTION
)
12970 gfc_error ("Character-valued statement function %qs at %L must "
12971 "have constant length", sym
->name
, &sym
->declared_at
);
12976 /* Ensure that derived type for are not of a private type. Internal
12977 module procedures are excluded by 2.2.3.3 - i.e., they are not
12978 externally accessible and can access all the objects accessible in
12980 if (!(sym
->ns
->parent
&& sym
->ns
->parent
->proc_name
12981 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12982 && gfc_check_symbol_access (sym
))
12984 gfc_interface
*iface
;
12986 for (arg
= gfc_sym_get_dummy_args (sym
); arg
; arg
= arg
->next
)
12989 && arg
->sym
->ts
.type
== BT_DERIVED
12990 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12991 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12992 && !gfc_notify_std (GFC_STD_F2003
, "%qs is of a PRIVATE type "
12993 "and cannot be a dummy argument"
12994 " of %qs, which is PUBLIC at %L",
12995 arg
->sym
->name
, sym
->name
,
12996 &sym
->declared_at
))
12998 /* Stop this message from recurring. */
12999 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
13004 /* PUBLIC interfaces may expose PRIVATE procedures that take types
13005 PRIVATE to the containing module. */
13006 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
13008 for (arg
= gfc_sym_get_dummy_args (iface
->sym
); arg
; arg
= arg
->next
)
13011 && arg
->sym
->ts
.type
== BT_DERIVED
13012 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
13013 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
13014 && !gfc_notify_std (GFC_STD_F2003
, "Procedure %qs in "
13015 "PUBLIC interface %qs at %L "
13016 "takes dummy arguments of %qs which "
13017 "is PRIVATE", iface
->sym
->name
,
13018 sym
->name
, &iface
->sym
->declared_at
,
13019 gfc_typename(&arg
->sym
->ts
)))
13021 /* Stop this message from recurring. */
13022 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
13029 if (sym
->attr
.function
&& sym
->value
&& sym
->attr
.proc
!= PROC_ST_FUNCTION
13030 && !sym
->attr
.proc_pointer
)
13032 gfc_error ("Function %qs at %L cannot have an initializer",
13033 sym
->name
, &sym
->declared_at
);
13035 /* Make sure no second error is issued for this. */
13036 sym
->value
->error
= 1;
13040 /* An external symbol may not have an initializer because it is taken to be
13041 a procedure. Exception: Procedure Pointers. */
13042 if (sym
->attr
.external
&& sym
->value
&& !sym
->attr
.proc_pointer
)
13044 gfc_error ("External object %qs at %L may not have an initializer",
13045 sym
->name
, &sym
->declared_at
);
13049 /* An elemental function is required to return a scalar 12.7.1 */
13050 if (sym
->attr
.elemental
&& sym
->attr
.function
13051 && (sym
->as
|| (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)))
13053 gfc_error ("ELEMENTAL function %qs at %L must have a scalar "
13054 "result", sym
->name
, &sym
->declared_at
);
13055 /* Reset so that the error only occurs once. */
13056 sym
->attr
.elemental
= 0;
13060 if (sym
->attr
.proc
== PROC_ST_FUNCTION
13061 && (sym
->attr
.allocatable
|| sym
->attr
.pointer
))
13063 gfc_error ("Statement function %qs at %L may not have pointer or "
13064 "allocatable attribute", sym
->name
, &sym
->declared_at
);
13068 /* 5.1.1.5 of the Standard: A function name declared with an asterisk
13069 char-len-param shall not be array-valued, pointer-valued, recursive
13070 or pure. ....snip... A character value of * may only be used in the
13071 following ways: (i) Dummy arg of procedure - dummy associates with
13072 actual length; (ii) To declare a named constant; or (iii) External
13073 function - but length must be declared in calling scoping unit. */
13074 if (sym
->attr
.function
13075 && sym
->ts
.type
== BT_CHARACTER
&& !sym
->ts
.deferred
13076 && sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
== NULL
)
13078 if ((sym
->as
&& sym
->as
->rank
) || (sym
->attr
.pointer
)
13079 || (sym
->attr
.recursive
) || (sym
->attr
.pure
))
13081 if (sym
->as
&& sym
->as
->rank
)
13082 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
13083 "array-valued", sym
->name
, &sym
->declared_at
);
13085 if (sym
->attr
.pointer
)
13086 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
13087 "pointer-valued", sym
->name
, &sym
->declared_at
);
13089 if (sym
->attr
.pure
)
13090 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
13091 "pure", sym
->name
, &sym
->declared_at
);
13093 if (sym
->attr
.recursive
)
13094 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
13095 "recursive", sym
->name
, &sym
->declared_at
);
13100 /* Appendix B.2 of the standard. Contained functions give an
13101 error anyway. Deferred character length is an F2003 feature.
13102 Don't warn on intrinsic conversion functions, which start
13103 with two underscores. */
13104 if (!sym
->attr
.contained
&& !sym
->ts
.deferred
13105 && (sym
->name
[0] != '_' || sym
->name
[1] != '_'))
13106 gfc_notify_std (GFC_STD_F95_OBS
,
13107 "CHARACTER(*) function %qs at %L",
13108 sym
->name
, &sym
->declared_at
);
13111 /* F2008, C1218. */
13112 if (sym
->attr
.elemental
)
13114 if (sym
->attr
.proc_pointer
)
13116 gfc_error ("Procedure pointer %qs at %L shall not be elemental",
13117 sym
->name
, &sym
->declared_at
);
13120 if (sym
->attr
.dummy
)
13122 gfc_error ("Dummy procedure %qs at %L shall not be elemental",
13123 sym
->name
, &sym
->declared_at
);
13128 /* F2018, C15100: "The result of an elemental function shall be scalar,
13129 and shall not have the POINTER or ALLOCATABLE attribute." The scalar
13130 pointer is tested and caught elsewhere. */
13131 if (sym
->attr
.elemental
&& sym
->result
13132 && (sym
->result
->attr
.allocatable
|| sym
->result
->attr
.pointer
))
13134 gfc_error ("Function result variable %qs at %L of elemental "
13135 "function %qs shall not have an ALLOCATABLE or POINTER "
13136 "attribute", sym
->result
->name
,
13137 &sym
->result
->declared_at
, sym
->name
);
13141 if (sym
->attr
.is_bind_c
&& sym
->attr
.is_c_interop
!= 1)
13143 gfc_formal_arglist
*curr_arg
;
13144 int has_non_interop_arg
= 0;
13146 if (!verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
13147 sym
->common_block
))
13149 /* Clear these to prevent looking at them again if there was an
13151 sym
->attr
.is_bind_c
= 0;
13152 sym
->attr
.is_c_interop
= 0;
13153 sym
->ts
.is_c_interop
= 0;
13157 /* So far, no errors have been found. */
13158 sym
->attr
.is_c_interop
= 1;
13159 sym
->ts
.is_c_interop
= 1;
13162 curr_arg
= gfc_sym_get_dummy_args (sym
);
13163 while (curr_arg
!= NULL
)
13165 /* Skip implicitly typed dummy args here. */
13166 if (curr_arg
->sym
&& curr_arg
->sym
->attr
.implicit_type
== 0)
13167 if (!gfc_verify_c_interop_param (curr_arg
->sym
))
13168 /* If something is found to fail, record the fact so we
13169 can mark the symbol for the procedure as not being
13170 BIND(C) to try and prevent multiple errors being
13172 has_non_interop_arg
= 1;
13174 curr_arg
= curr_arg
->next
;
13177 /* See if any of the arguments were not interoperable and if so, clear
13178 the procedure symbol to prevent duplicate error messages. */
13179 if (has_non_interop_arg
!= 0)
13181 sym
->attr
.is_c_interop
= 0;
13182 sym
->ts
.is_c_interop
= 0;
13183 sym
->attr
.is_bind_c
= 0;
13187 if (!sym
->attr
.proc_pointer
)
13189 if (sym
->attr
.save
== SAVE_EXPLICIT
)
13191 gfc_error ("PROCEDURE attribute conflicts with SAVE attribute "
13192 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13195 if (sym
->attr
.intent
)
13197 gfc_error ("PROCEDURE attribute conflicts with INTENT attribute "
13198 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13201 if (sym
->attr
.subroutine
&& sym
->attr
.result
)
13203 gfc_error ("PROCEDURE attribute conflicts with RESULT attribute "
13204 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13207 if (sym
->attr
.external
&& sym
->attr
.function
&& !sym
->attr
.module_procedure
13208 && ((sym
->attr
.if_source
== IFSRC_DECL
&& !sym
->attr
.procedure
)
13209 || sym
->attr
.contained
))
13211 gfc_error ("EXTERNAL attribute conflicts with FUNCTION attribute "
13212 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13215 if (strcmp ("ppr@", sym
->name
) == 0)
13217 gfc_error ("Procedure pointer result %qs at %L "
13218 "is missing the pointer attribute",
13219 sym
->ns
->proc_name
->name
, &sym
->declared_at
);
13224 /* Assume that a procedure whose body is not known has references
13225 to external arrays. */
13226 if (sym
->attr
.if_source
!= IFSRC_DECL
)
13227 sym
->attr
.array_outer_dependency
= 1;
13229 /* Compare the characteristics of a module procedure with the
13230 interface declaration. Ideally this would be done with
13231 gfc_compare_interfaces but, at present, the formal interface
13232 cannot be copied to the ts.interface. */
13233 if (sym
->attr
.module_procedure
13234 && sym
->attr
.if_source
== IFSRC_DECL
)
13237 char name
[2*GFC_MAX_SYMBOL_LEN
+ 1];
13239 char *submodule_name
;
13240 strcpy (name
, sym
->ns
->proc_name
->name
);
13241 module_name
= strtok (name
, ".");
13242 submodule_name
= strtok (NULL
, ".");
13244 iface
= sym
->tlink
;
13247 /* Make sure that the result uses the correct charlen for deferred
13249 if (iface
&& sym
->result
13250 && iface
->ts
.type
== BT_CHARACTER
13251 && iface
->ts
.deferred
)
13252 sym
->result
->ts
.u
.cl
= iface
->ts
.u
.cl
;
13257 /* Check the procedure characteristics. */
13258 if (sym
->attr
.elemental
!= iface
->attr
.elemental
)
13260 gfc_error ("Mismatch in ELEMENTAL attribute between MODULE "
13261 "PROCEDURE at %L and its interface in %s",
13262 &sym
->declared_at
, module_name
);
13266 if (sym
->attr
.pure
!= iface
->attr
.pure
)
13268 gfc_error ("Mismatch in PURE attribute between MODULE "
13269 "PROCEDURE at %L and its interface in %s",
13270 &sym
->declared_at
, module_name
);
13274 if (sym
->attr
.recursive
!= iface
->attr
.recursive
)
13276 gfc_error ("Mismatch in RECURSIVE attribute between MODULE "
13277 "PROCEDURE at %L and its interface in %s",
13278 &sym
->declared_at
, module_name
);
13282 /* Check the result characteristics. */
13283 if (!gfc_check_result_characteristics (sym
, iface
, errmsg
, 200))
13285 gfc_error ("%s between the MODULE PROCEDURE declaration "
13286 "in MODULE %qs and the declaration at %L in "
13288 errmsg
, module_name
, &sym
->declared_at
,
13289 submodule_name
? submodule_name
: module_name
);
13294 /* Check the characteristics of the formal arguments. */
13295 if (sym
->formal
&& sym
->formal_ns
)
13297 for (arg
= sym
->formal
; arg
&& arg
->sym
; arg
= arg
->next
)
13300 gfc_traverse_ns (sym
->formal_ns
, compare_fsyms
);
13308 /* Resolve a list of finalizer procedures. That is, after they have hopefully
13309 been defined and we now know their defined arguments, check that they fulfill
13310 the requirements of the standard for procedures used as finalizers. */
13313 gfc_resolve_finalizers (gfc_symbol
* derived
, bool *finalizable
)
13315 gfc_finalizer
* list
;
13316 gfc_finalizer
** prev_link
; /* For removing wrong entries from the list. */
13317 bool result
= true;
13318 bool seen_scalar
= false;
13321 gfc_symbol
*parent
= gfc_get_derived_super_type (derived
);
13324 gfc_resolve_finalizers (parent
, finalizable
);
13326 /* Ensure that derived-type components have a their finalizers resolved. */
13327 bool has_final
= derived
->f2k_derived
&& derived
->f2k_derived
->finalizers
;
13328 for (c
= derived
->components
; c
; c
= c
->next
)
13329 if (c
->ts
.type
== BT_DERIVED
13330 && !c
->attr
.pointer
&& !c
->attr
.proc_pointer
&& !c
->attr
.allocatable
)
13332 bool has_final2
= false;
13333 if (!gfc_resolve_finalizers (c
->ts
.u
.derived
, &has_final2
))
13334 return false; /* Error. */
13335 has_final
= has_final
|| has_final2
;
13337 /* Return early if not finalizable. */
13341 *finalizable
= false;
13345 /* Walk over the list of finalizer-procedures, check them, and if any one
13346 does not fit in with the standard's definition, print an error and remove
13347 it from the list. */
13348 prev_link
= &derived
->f2k_derived
->finalizers
;
13349 for (list
= derived
->f2k_derived
->finalizers
; list
; list
= *prev_link
)
13351 gfc_formal_arglist
*dummy_args
;
13356 /* Skip this finalizer if we already resolved it. */
13357 if (list
->proc_tree
)
13359 if (list
->proc_tree
->n
.sym
->formal
->sym
->as
== NULL
13360 || list
->proc_tree
->n
.sym
->formal
->sym
->as
->rank
== 0)
13361 seen_scalar
= true;
13362 prev_link
= &(list
->next
);
13366 /* Check this exists and is a SUBROUTINE. */
13367 if (!list
->proc_sym
->attr
.subroutine
)
13369 gfc_error ("FINAL procedure %qs at %L is not a SUBROUTINE",
13370 list
->proc_sym
->name
, &list
->where
);
13374 /* We should have exactly one argument. */
13375 dummy_args
= gfc_sym_get_dummy_args (list
->proc_sym
);
13376 if (!dummy_args
|| dummy_args
->next
)
13378 gfc_error ("FINAL procedure at %L must have exactly one argument",
13382 arg
= dummy_args
->sym
;
13384 /* This argument must be of our type. */
13385 if (arg
->ts
.type
!= BT_DERIVED
|| arg
->ts
.u
.derived
!= derived
)
13387 gfc_error ("Argument of FINAL procedure at %L must be of type %qs",
13388 &arg
->declared_at
, derived
->name
);
13392 /* It must neither be a pointer nor allocatable nor optional. */
13393 if (arg
->attr
.pointer
)
13395 gfc_error ("Argument of FINAL procedure at %L must not be a POINTER",
13396 &arg
->declared_at
);
13399 if (arg
->attr
.allocatable
)
13401 gfc_error ("Argument of FINAL procedure at %L must not be"
13402 " ALLOCATABLE", &arg
->declared_at
);
13405 if (arg
->attr
.optional
)
13407 gfc_error ("Argument of FINAL procedure at %L must not be OPTIONAL",
13408 &arg
->declared_at
);
13412 /* It must not be INTENT(OUT). */
13413 if (arg
->attr
.intent
== INTENT_OUT
)
13415 gfc_error ("Argument of FINAL procedure at %L must not be"
13416 " INTENT(OUT)", &arg
->declared_at
);
13420 /* Warn if the procedure is non-scalar and not assumed shape. */
13421 if (warn_surprising
&& arg
->as
&& arg
->as
->rank
!= 0
13422 && arg
->as
->type
!= AS_ASSUMED_SHAPE
)
13423 gfc_warning (OPT_Wsurprising
,
13424 "Non-scalar FINAL procedure at %L should have assumed"
13425 " shape argument", &arg
->declared_at
);
13427 /* Check that it does not match in kind and rank with a FINAL procedure
13428 defined earlier. To really loop over the *earlier* declarations,
13429 we need to walk the tail of the list as new ones were pushed at the
13431 /* TODO: Handle kind parameters once they are implemented. */
13432 my_rank
= (arg
->as
? arg
->as
->rank
: 0);
13433 for (i
= list
->next
; i
; i
= i
->next
)
13435 gfc_formal_arglist
*dummy_args
;
13437 /* Argument list might be empty; that is an error signalled earlier,
13438 but we nevertheless continued resolving. */
13439 dummy_args
= gfc_sym_get_dummy_args (i
->proc_sym
);
13442 gfc_symbol
* i_arg
= dummy_args
->sym
;
13443 const int i_rank
= (i_arg
->as
? i_arg
->as
->rank
: 0);
13444 if (i_rank
== my_rank
)
13446 gfc_error ("FINAL procedure %qs declared at %L has the same"
13447 " rank (%d) as %qs",
13448 list
->proc_sym
->name
, &list
->where
, my_rank
,
13449 i
->proc_sym
->name
);
13455 /* Is this the/a scalar finalizer procedure? */
13457 seen_scalar
= true;
13459 /* Find the symtree for this procedure. */
13460 gcc_assert (!list
->proc_tree
);
13461 list
->proc_tree
= gfc_find_sym_in_symtree (list
->proc_sym
);
13463 prev_link
= &list
->next
;
13466 /* Remove wrong nodes immediately from the list so we don't risk any
13467 troubles in the future when they might fail later expectations. */
13470 *prev_link
= list
->next
;
13471 gfc_free_finalizer (i
);
13475 if (result
== false)
13478 /* Warn if we haven't seen a scalar finalizer procedure (but we know there
13479 were nodes in the list, must have been for arrays. It is surely a good
13480 idea to have a scalar version there if there's something to finalize. */
13481 if (warn_surprising
&& derived
->f2k_derived
->finalizers
&& !seen_scalar
)
13482 gfc_warning (OPT_Wsurprising
,
13483 "Only array FINAL procedures declared for derived type %qs"
13484 " defined at %L, suggest also scalar one",
13485 derived
->name
, &derived
->declared_at
);
13487 vtab
= gfc_find_derived_vtab (derived
);
13488 c
= vtab
->ts
.u
.derived
->components
->next
->next
->next
->next
->next
;
13489 gfc_set_sym_referenced (c
->initializer
->symtree
->n
.sym
);
13492 *finalizable
= true;
13498 /* Check if two GENERIC targets are ambiguous and emit an error is they are. */
13501 check_generic_tbp_ambiguity (gfc_tbp_generic
* t1
, gfc_tbp_generic
* t2
,
13502 const char* generic_name
, locus where
)
13504 gfc_symbol
*sym1
, *sym2
;
13505 const char *pass1
, *pass2
;
13506 gfc_formal_arglist
*dummy_args
;
13508 gcc_assert (t1
->specific
&& t2
->specific
);
13509 gcc_assert (!t1
->specific
->is_generic
);
13510 gcc_assert (!t2
->specific
->is_generic
);
13511 gcc_assert (t1
->is_operator
== t2
->is_operator
);
13513 sym1
= t1
->specific
->u
.specific
->n
.sym
;
13514 sym2
= t2
->specific
->u
.specific
->n
.sym
;
13519 /* Both must be SUBROUTINEs or both must be FUNCTIONs. */
13520 if (sym1
->attr
.subroutine
!= sym2
->attr
.subroutine
13521 || sym1
->attr
.function
!= sym2
->attr
.function
)
13523 gfc_error ("%qs and %qs cannot be mixed FUNCTION/SUBROUTINE for"
13524 " GENERIC %qs at %L",
13525 sym1
->name
, sym2
->name
, generic_name
, &where
);
13529 /* Determine PASS arguments. */
13530 if (t1
->specific
->nopass
)
13532 else if (t1
->specific
->pass_arg
)
13533 pass1
= t1
->specific
->pass_arg
;
13536 dummy_args
= gfc_sym_get_dummy_args (t1
->specific
->u
.specific
->n
.sym
);
13538 pass1
= dummy_args
->sym
->name
;
13542 if (t2
->specific
->nopass
)
13544 else if (t2
->specific
->pass_arg
)
13545 pass2
= t2
->specific
->pass_arg
;
13548 dummy_args
= gfc_sym_get_dummy_args (t2
->specific
->u
.specific
->n
.sym
);
13550 pass2
= dummy_args
->sym
->name
;
13555 /* Compare the interfaces. */
13556 if (gfc_compare_interfaces (sym1
, sym2
, sym2
->name
, !t1
->is_operator
, 0,
13557 NULL
, 0, pass1
, pass2
))
13559 gfc_error ("%qs and %qs for GENERIC %qs at %L are ambiguous",
13560 sym1
->name
, sym2
->name
, generic_name
, &where
);
13568 /* Worker function for resolving a generic procedure binding; this is used to
13569 resolve GENERIC as well as user and intrinsic OPERATOR typebound procedures.
13571 The difference between those cases is finding possible inherited bindings
13572 that are overridden, as one has to look for them in tb_sym_root,
13573 tb_uop_root or tb_op, respectively. Thus the caller must already find
13574 the super-type and set p->overridden correctly. */
13577 resolve_tb_generic_targets (gfc_symbol
* super_type
,
13578 gfc_typebound_proc
* p
, const char* name
)
13580 gfc_tbp_generic
* target
;
13581 gfc_symtree
* first_target
;
13582 gfc_symtree
* inherited
;
13584 gcc_assert (p
&& p
->is_generic
);
13586 /* Try to find the specific bindings for the symtrees in our target-list. */
13587 gcc_assert (p
->u
.generic
);
13588 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13589 if (!target
->specific
)
13591 gfc_typebound_proc
* overridden_tbp
;
13592 gfc_tbp_generic
* g
;
13593 const char* target_name
;
13595 target_name
= target
->specific_st
->name
;
13597 /* Defined for this type directly. */
13598 if (target
->specific_st
->n
.tb
&& !target
->specific_st
->n
.tb
->error
)
13600 target
->specific
= target
->specific_st
->n
.tb
;
13601 goto specific_found
;
13604 /* Look for an inherited specific binding. */
13607 inherited
= gfc_find_typebound_proc (super_type
, NULL
, target_name
,
13612 gcc_assert (inherited
->n
.tb
);
13613 target
->specific
= inherited
->n
.tb
;
13614 goto specific_found
;
13618 gfc_error ("Undefined specific binding %qs as target of GENERIC %qs"
13619 " at %L", target_name
, name
, &p
->where
);
13622 /* Once we've found the specific binding, check it is not ambiguous with
13623 other specifics already found or inherited for the same GENERIC. */
13625 gcc_assert (target
->specific
);
13627 /* This must really be a specific binding! */
13628 if (target
->specific
->is_generic
)
13630 gfc_error ("GENERIC %qs at %L must target a specific binding,"
13631 " %qs is GENERIC, too", name
, &p
->where
, target_name
);
13635 /* Check those already resolved on this type directly. */
13636 for (g
= p
->u
.generic
; g
; g
= g
->next
)
13637 if (g
!= target
&& g
->specific
13638 && !check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13641 /* Check for ambiguity with inherited specific targets. */
13642 for (overridden_tbp
= p
->overridden
; overridden_tbp
;
13643 overridden_tbp
= overridden_tbp
->overridden
)
13644 if (overridden_tbp
->is_generic
)
13646 for (g
= overridden_tbp
->u
.generic
; g
; g
= g
->next
)
13648 gcc_assert (g
->specific
);
13649 if (!check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13655 /* If we attempt to "overwrite" a specific binding, this is an error. */
13656 if (p
->overridden
&& !p
->overridden
->is_generic
)
13658 gfc_error ("GENERIC %qs at %L cannot overwrite specific binding with"
13659 " the same name", name
, &p
->where
);
13663 /* Take the SUBROUTINE/FUNCTION attributes of the first specific target, as
13664 all must have the same attributes here. */
13665 first_target
= p
->u
.generic
->specific
->u
.specific
;
13666 gcc_assert (first_target
);
13667 p
->subroutine
= first_target
->n
.sym
->attr
.subroutine
;
13668 p
->function
= first_target
->n
.sym
->attr
.function
;
13674 /* Resolve a GENERIC procedure binding for a derived type. */
13677 resolve_typebound_generic (gfc_symbol
* derived
, gfc_symtree
* st
)
13679 gfc_symbol
* super_type
;
13681 /* Find the overridden binding if any. */
13682 st
->n
.tb
->overridden
= NULL
;
13683 super_type
= gfc_get_derived_super_type (derived
);
13686 gfc_symtree
* overridden
;
13687 overridden
= gfc_find_typebound_proc (super_type
, NULL
, st
->name
,
13690 if (overridden
&& overridden
->n
.tb
)
13691 st
->n
.tb
->overridden
= overridden
->n
.tb
;
13694 /* Resolve using worker function. */
13695 return resolve_tb_generic_targets (super_type
, st
->n
.tb
, st
->name
);
13699 /* Retrieve the target-procedure of an operator binding and do some checks in
13700 common for intrinsic and user-defined type-bound operators. */
13703 get_checked_tb_operator_target (gfc_tbp_generic
* target
, locus where
)
13705 gfc_symbol
* target_proc
;
13707 gcc_assert (target
->specific
&& !target
->specific
->is_generic
);
13708 target_proc
= target
->specific
->u
.specific
->n
.sym
;
13709 gcc_assert (target_proc
);
13711 /* F08:C468. All operator bindings must have a passed-object dummy argument. */
13712 if (target
->specific
->nopass
)
13714 gfc_error ("Type-bound operator at %L cannot be NOPASS", &where
);
13718 return target_proc
;
13722 /* Resolve a type-bound intrinsic operator. */
13725 resolve_typebound_intrinsic_op (gfc_symbol
* derived
, gfc_intrinsic_op op
,
13726 gfc_typebound_proc
* p
)
13728 gfc_symbol
* super_type
;
13729 gfc_tbp_generic
* target
;
13731 /* If there's already an error here, do nothing (but don't fail again). */
13735 /* Operators should always be GENERIC bindings. */
13736 gcc_assert (p
->is_generic
);
13738 /* Look for an overridden binding. */
13739 super_type
= gfc_get_derived_super_type (derived
);
13740 if (super_type
&& super_type
->f2k_derived
)
13741 p
->overridden
= gfc_find_typebound_intrinsic_op (super_type
, NULL
,
13744 p
->overridden
= NULL
;
13746 /* Resolve general GENERIC properties using worker function. */
13747 if (!resolve_tb_generic_targets (super_type
, p
, gfc_op2string(op
)))
13750 /* Check the targets to be procedures of correct interface. */
13751 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13753 gfc_symbol
* target_proc
;
13755 target_proc
= get_checked_tb_operator_target (target
, p
->where
);
13759 if (!gfc_check_operator_interface (target_proc
, op
, p
->where
))
13762 /* Add target to non-typebound operator list. */
13763 if (!target
->specific
->deferred
&& !derived
->attr
.use_assoc
13764 && p
->access
!= ACCESS_PRIVATE
&& derived
->ns
== gfc_current_ns
)
13766 gfc_interface
*head
, *intr
;
13768 /* Preempt 'gfc_check_new_interface' for submodules, where the
13769 mechanism for handling module procedures winds up resolving
13770 operator interfaces twice and would otherwise cause an error. */
13771 for (intr
= derived
->ns
->op
[op
]; intr
; intr
= intr
->next
)
13772 if (intr
->sym
== target_proc
13773 && target_proc
->attr
.used_in_submodule
)
13776 if (!gfc_check_new_interface (derived
->ns
->op
[op
],
13777 target_proc
, p
->where
))
13779 head
= derived
->ns
->op
[op
];
13780 intr
= gfc_get_interface ();
13781 intr
->sym
= target_proc
;
13782 intr
->where
= p
->where
;
13784 derived
->ns
->op
[op
] = intr
;
13796 /* Resolve a type-bound user operator (tree-walker callback). */
13798 static gfc_symbol
* resolve_bindings_derived
;
13799 static bool resolve_bindings_result
;
13801 static bool check_uop_procedure (gfc_symbol
* sym
, locus where
);
13804 resolve_typebound_user_op (gfc_symtree
* stree
)
13806 gfc_symbol
* super_type
;
13807 gfc_tbp_generic
* target
;
13809 gcc_assert (stree
&& stree
->n
.tb
);
13811 if (stree
->n
.tb
->error
)
13814 /* Operators should always be GENERIC bindings. */
13815 gcc_assert (stree
->n
.tb
->is_generic
);
13817 /* Find overridden procedure, if any. */
13818 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13819 if (super_type
&& super_type
->f2k_derived
)
13821 gfc_symtree
* overridden
;
13822 overridden
= gfc_find_typebound_user_op (super_type
, NULL
,
13823 stree
->name
, true, NULL
);
13825 if (overridden
&& overridden
->n
.tb
)
13826 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13829 stree
->n
.tb
->overridden
= NULL
;
13831 /* Resolve basically using worker function. */
13832 if (!resolve_tb_generic_targets (super_type
, stree
->n
.tb
, stree
->name
))
13835 /* Check the targets to be functions of correct interface. */
13836 for (target
= stree
->n
.tb
->u
.generic
; target
; target
= target
->next
)
13838 gfc_symbol
* target_proc
;
13840 target_proc
= get_checked_tb_operator_target (target
, stree
->n
.tb
->where
);
13844 if (!check_uop_procedure (target_proc
, stree
->n
.tb
->where
))
13851 resolve_bindings_result
= false;
13852 stree
->n
.tb
->error
= 1;
13856 /* Resolve the type-bound procedures for a derived type. */
13859 resolve_typebound_procedure (gfc_symtree
* stree
)
13863 gfc_symbol
* me_arg
;
13864 gfc_symbol
* super_type
;
13865 gfc_component
* comp
;
13867 gcc_assert (stree
);
13869 /* Undefined specific symbol from GENERIC target definition. */
13873 if (stree
->n
.tb
->error
)
13876 /* If this is a GENERIC binding, use that routine. */
13877 if (stree
->n
.tb
->is_generic
)
13879 if (!resolve_typebound_generic (resolve_bindings_derived
, stree
))
13884 /* Get the target-procedure to check it. */
13885 gcc_assert (!stree
->n
.tb
->is_generic
);
13886 gcc_assert (stree
->n
.tb
->u
.specific
);
13887 proc
= stree
->n
.tb
->u
.specific
->n
.sym
;
13888 where
= stree
->n
.tb
->where
;
13890 /* Default access should already be resolved from the parser. */
13891 gcc_assert (stree
->n
.tb
->access
!= ACCESS_UNKNOWN
);
13893 if (stree
->n
.tb
->deferred
)
13895 if (!check_proc_interface (proc
, &where
))
13900 /* If proc has not been resolved at this point, proc->name may
13901 actually be a USE associated entity. See PR fortran/89647. */
13902 if (!proc
->resolved
13903 && proc
->attr
.function
== 0 && proc
->attr
.subroutine
== 0)
13906 gfc_find_symbol (proc
->name
, gfc_current_ns
->parent
, 1, &tmp
);
13907 if (tmp
&& tmp
->attr
.use_assoc
)
13909 proc
->module
= tmp
->module
;
13910 proc
->attr
.proc
= tmp
->attr
.proc
;
13911 proc
->attr
.function
= tmp
->attr
.function
;
13912 proc
->attr
.subroutine
= tmp
->attr
.subroutine
;
13913 proc
->attr
.use_assoc
= tmp
->attr
.use_assoc
;
13914 proc
->ts
= tmp
->ts
;
13915 proc
->result
= tmp
->result
;
13919 /* Check for F08:C465. */
13920 if ((!proc
->attr
.subroutine
&& !proc
->attr
.function
)
13921 || (proc
->attr
.proc
!= PROC_MODULE
13922 && proc
->attr
.if_source
!= IFSRC_IFBODY
)
13923 || proc
->attr
.abstract
)
13925 gfc_error ("%qs must be a module procedure or an external "
13926 "procedure with an explicit interface at %L",
13927 proc
->name
, &where
);
13932 stree
->n
.tb
->subroutine
= proc
->attr
.subroutine
;
13933 stree
->n
.tb
->function
= proc
->attr
.function
;
13935 /* Find the super-type of the current derived type. We could do this once and
13936 store in a global if speed is needed, but as long as not I believe this is
13937 more readable and clearer. */
13938 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13940 /* If PASS, resolve and check arguments if not already resolved / loaded
13941 from a .mod file. */
13942 if (!stree
->n
.tb
->nopass
&& stree
->n
.tb
->pass_arg_num
== 0)
13944 gfc_formal_arglist
*dummy_args
;
13946 dummy_args
= gfc_sym_get_dummy_args (proc
);
13947 if (stree
->n
.tb
->pass_arg
)
13949 gfc_formal_arglist
*i
;
13951 /* If an explicit passing argument name is given, walk the arg-list
13952 and look for it. */
13955 stree
->n
.tb
->pass_arg_num
= 1;
13956 for (i
= dummy_args
; i
; i
= i
->next
)
13958 if (!strcmp (i
->sym
->name
, stree
->n
.tb
->pass_arg
))
13963 ++stree
->n
.tb
->pass_arg_num
;
13968 gfc_error ("Procedure %qs with PASS(%s) at %L has no"
13970 proc
->name
, stree
->n
.tb
->pass_arg
, &where
,
13971 stree
->n
.tb
->pass_arg
);
13977 /* Otherwise, take the first one; there should in fact be at least
13979 stree
->n
.tb
->pass_arg_num
= 1;
13982 gfc_error ("Procedure %qs with PASS at %L must have at"
13983 " least one argument", proc
->name
, &where
);
13986 me_arg
= dummy_args
->sym
;
13989 /* Now check that the argument-type matches and the passed-object
13990 dummy argument is generally fine. */
13992 gcc_assert (me_arg
);
13994 if (me_arg
->ts
.type
!= BT_CLASS
)
13996 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13997 " at %L", proc
->name
, &where
);
14001 if (CLASS_DATA (me_arg
)->ts
.u
.derived
14002 != resolve_bindings_derived
)
14004 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
14005 " the derived-type %qs", me_arg
->name
, proc
->name
,
14006 me_arg
->name
, &where
, resolve_bindings_derived
->name
);
14010 gcc_assert (me_arg
->ts
.type
== BT_CLASS
);
14011 if (CLASS_DATA (me_arg
)->as
&& CLASS_DATA (me_arg
)->as
->rank
!= 0)
14013 gfc_error ("Passed-object dummy argument of %qs at %L must be"
14014 " scalar", proc
->name
, &where
);
14017 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
14019 gfc_error ("Passed-object dummy argument of %qs at %L must not"
14020 " be ALLOCATABLE", proc
->name
, &where
);
14023 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
14025 gfc_error ("Passed-object dummy argument of %qs at %L must not"
14026 " be POINTER", proc
->name
, &where
);
14031 /* If we are extending some type, check that we don't override a procedure
14032 flagged NON_OVERRIDABLE. */
14033 stree
->n
.tb
->overridden
= NULL
;
14036 gfc_symtree
* overridden
;
14037 overridden
= gfc_find_typebound_proc (super_type
, NULL
,
14038 stree
->name
, true, NULL
);
14042 if (overridden
->n
.tb
)
14043 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
14045 if (!gfc_check_typebound_override (stree
, overridden
))
14050 /* See if there's a name collision with a component directly in this type. */
14051 for (comp
= resolve_bindings_derived
->components
; comp
; comp
= comp
->next
)
14052 if (!strcmp (comp
->name
, stree
->name
))
14054 gfc_error ("Procedure %qs at %L has the same name as a component of"
14056 stree
->name
, &where
, resolve_bindings_derived
->name
);
14060 /* Try to find a name collision with an inherited component. */
14061 if (super_type
&& gfc_find_component (super_type
, stree
->name
, true, true,
14064 gfc_error ("Procedure %qs at %L has the same name as an inherited"
14065 " component of %qs",
14066 stree
->name
, &where
, resolve_bindings_derived
->name
);
14070 stree
->n
.tb
->error
= 0;
14074 resolve_bindings_result
= false;
14075 stree
->n
.tb
->error
= 1;
14080 resolve_typebound_procedures (gfc_symbol
* derived
)
14083 gfc_symbol
* super_type
;
14085 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->tb_sym_root
)
14088 super_type
= gfc_get_derived_super_type (derived
);
14090 resolve_symbol (super_type
);
14092 resolve_bindings_derived
= derived
;
14093 resolve_bindings_result
= true;
14095 if (derived
->f2k_derived
->tb_sym_root
)
14096 gfc_traverse_symtree (derived
->f2k_derived
->tb_sym_root
,
14097 &resolve_typebound_procedure
);
14099 if (derived
->f2k_derived
->tb_uop_root
)
14100 gfc_traverse_symtree (derived
->f2k_derived
->tb_uop_root
,
14101 &resolve_typebound_user_op
);
14103 for (op
= 0; op
!= GFC_INTRINSIC_OPS
; ++op
)
14105 gfc_typebound_proc
* p
= derived
->f2k_derived
->tb_op
[op
];
14106 if (p
&& !resolve_typebound_intrinsic_op (derived
,
14107 (gfc_intrinsic_op
)op
, p
))
14108 resolve_bindings_result
= false;
14111 return resolve_bindings_result
;
14115 /* Add a derived type to the dt_list. The dt_list is used in trans-types.c
14116 to give all identical derived types the same backend_decl. */
14118 add_dt_to_dt_list (gfc_symbol
*derived
)
14120 if (!derived
->dt_next
)
14122 if (gfc_derived_types
)
14124 derived
->dt_next
= gfc_derived_types
->dt_next
;
14125 gfc_derived_types
->dt_next
= derived
;
14129 derived
->dt_next
= derived
;
14131 gfc_derived_types
= derived
;
14136 /* Ensure that a derived-type is really not abstract, meaning that every
14137 inherited DEFERRED binding is overridden by a non-DEFERRED one. */
14140 ensure_not_abstract_walker (gfc_symbol
* sub
, gfc_symtree
* st
)
14145 if (!ensure_not_abstract_walker (sub
, st
->left
))
14147 if (!ensure_not_abstract_walker (sub
, st
->right
))
14150 if (st
->n
.tb
&& st
->n
.tb
->deferred
)
14152 gfc_symtree
* overriding
;
14153 overriding
= gfc_find_typebound_proc (sub
, NULL
, st
->name
, true, NULL
);
14156 gcc_assert (overriding
->n
.tb
);
14157 if (overriding
->n
.tb
->deferred
)
14159 gfc_error ("Derived-type %qs declared at %L must be ABSTRACT because"
14160 " %qs is DEFERRED and not overridden",
14161 sub
->name
, &sub
->declared_at
, st
->name
);
14170 ensure_not_abstract (gfc_symbol
* sub
, gfc_symbol
* ancestor
)
14172 /* The algorithm used here is to recursively travel up the ancestry of sub
14173 and for each ancestor-type, check all bindings. If any of them is
14174 DEFERRED, look it up starting from sub and see if the found (overriding)
14175 binding is not DEFERRED.
14176 This is not the most efficient way to do this, but it should be ok and is
14177 clearer than something sophisticated. */
14179 gcc_assert (ancestor
&& !sub
->attr
.abstract
);
14181 if (!ancestor
->attr
.abstract
)
14184 /* Walk bindings of this ancestor. */
14185 if (ancestor
->f2k_derived
)
14188 t
= ensure_not_abstract_walker (sub
, ancestor
->f2k_derived
->tb_sym_root
);
14193 /* Find next ancestor type and recurse on it. */
14194 ancestor
= gfc_get_derived_super_type (ancestor
);
14196 return ensure_not_abstract (sub
, ancestor
);
14202 /* This check for typebound defined assignments is done recursively
14203 since the order in which derived types are resolved is not always in
14204 order of the declarations. */
14207 check_defined_assignments (gfc_symbol
*derived
)
14211 for (c
= derived
->components
; c
; c
= c
->next
)
14213 if (!gfc_bt_struct (c
->ts
.type
)
14215 || c
->attr
.allocatable
14216 || c
->attr
.proc_pointer_comp
14217 || c
->attr
.class_pointer
14218 || c
->attr
.proc_pointer
)
14221 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
14222 || (c
->ts
.u
.derived
->f2k_derived
14223 && c
->ts
.u
.derived
->f2k_derived
->tb_op
[INTRINSIC_ASSIGN
]))
14225 derived
->attr
.defined_assign_comp
= 1;
14229 check_defined_assignments (c
->ts
.u
.derived
);
14230 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
14232 derived
->attr
.defined_assign_comp
= 1;
14239 /* Resolve a single component of a derived type or structure. */
14242 resolve_component (gfc_component
*c
, gfc_symbol
*sym
)
14244 gfc_symbol
*super_type
;
14245 symbol_attribute
*attr
;
14247 if (c
->attr
.artificial
)
14250 /* Do not allow vtype components to be resolved in nameless namespaces
14251 such as block data because the procedure pointers will cause ICEs
14252 and vtables are not needed in these contexts. */
14253 if (sym
->attr
.vtype
&& sym
->attr
.use_assoc
14254 && sym
->ns
->proc_name
== NULL
)
14258 if ((!sym
->attr
.is_class
|| c
!= sym
->components
)
14259 && c
->attr
.codimension
14260 && (!c
->attr
.allocatable
|| (c
->as
&& c
->as
->type
!= AS_DEFERRED
)))
14262 gfc_error ("Coarray component %qs at %L must be allocatable with "
14263 "deferred shape", c
->name
, &c
->loc
);
14268 if (c
->attr
.codimension
&& c
->ts
.type
== BT_DERIVED
14269 && c
->ts
.u
.derived
->ts
.is_iso_c
)
14271 gfc_error ("Component %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
14272 "shall not be a coarray", c
->name
, &c
->loc
);
14277 if (gfc_bt_struct (c
->ts
.type
) && c
->ts
.u
.derived
->attr
.coarray_comp
14278 && (c
->attr
.codimension
|| c
->attr
.pointer
|| c
->attr
.dimension
14279 || c
->attr
.allocatable
))
14281 gfc_error ("Component %qs at %L with coarray component "
14282 "shall be a nonpointer, nonallocatable scalar",
14288 if (c
->ts
.type
== BT_CLASS
)
14290 if (CLASS_DATA (c
))
14292 attr
= &(CLASS_DATA (c
)->attr
);
14294 /* Fix up contiguous attribute. */
14295 if (c
->attr
.contiguous
)
14296 attr
->contiguous
= 1;
14304 if (attr
&& attr
->contiguous
&& (!attr
->dimension
|| !attr
->pointer
))
14306 gfc_error ("Component %qs at %L has the CONTIGUOUS attribute but "
14307 "is not an array pointer", c
->name
, &c
->loc
);
14311 /* F2003, 15.2.1 - length has to be one. */
14312 if (sym
->attr
.is_bind_c
&& c
->ts
.type
== BT_CHARACTER
14313 && (c
->ts
.u
.cl
== NULL
|| c
->ts
.u
.cl
->length
== NULL
14314 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
)
14315 || mpz_cmp_si (c
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
14317 gfc_error ("Component %qs of BIND(C) type at %L must have length one",
14322 if (c
->attr
.proc_pointer
&& c
->ts
.interface
)
14324 gfc_symbol
*ifc
= c
->ts
.interface
;
14326 if (!sym
->attr
.vtype
&& !check_proc_interface (ifc
, &c
->loc
))
14332 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
14334 /* Resolve interface and copy attributes. */
14335 if (ifc
->formal
&& !ifc
->formal_ns
)
14336 resolve_symbol (ifc
);
14337 if (ifc
->attr
.intrinsic
)
14338 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
14342 c
->ts
= ifc
->result
->ts
;
14343 c
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
14344 c
->attr
.pointer
= ifc
->result
->attr
.pointer
;
14345 c
->attr
.dimension
= ifc
->result
->attr
.dimension
;
14346 c
->as
= gfc_copy_array_spec (ifc
->result
->as
);
14347 c
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
14352 c
->attr
.allocatable
= ifc
->attr
.allocatable
;
14353 c
->attr
.pointer
= ifc
->attr
.pointer
;
14354 c
->attr
.dimension
= ifc
->attr
.dimension
;
14355 c
->as
= gfc_copy_array_spec (ifc
->as
);
14356 c
->attr
.class_ok
= ifc
->attr
.class_ok
;
14358 c
->ts
.interface
= ifc
;
14359 c
->attr
.function
= ifc
->attr
.function
;
14360 c
->attr
.subroutine
= ifc
->attr
.subroutine
;
14362 c
->attr
.pure
= ifc
->attr
.pure
;
14363 c
->attr
.elemental
= ifc
->attr
.elemental
;
14364 c
->attr
.recursive
= ifc
->attr
.recursive
;
14365 c
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
14366 c
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
14367 /* Copy char length. */
14368 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
14370 gfc_charlen
*cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
14371 if (cl
->length
&& !cl
->resolved
14372 && !gfc_resolve_expr (cl
->length
))
14381 else if (c
->attr
.proc_pointer
&& c
->ts
.type
== BT_UNKNOWN
)
14383 /* Since PPCs are not implicitly typed, a PPC without an explicit
14384 interface must be a subroutine. */
14385 gfc_add_subroutine (&c
->attr
, c
->name
, &c
->loc
);
14388 /* Procedure pointer components: Check PASS arg. */
14389 if (c
->attr
.proc_pointer
&& !c
->tb
->nopass
&& c
->tb
->pass_arg_num
== 0
14390 && !sym
->attr
.vtype
)
14392 gfc_symbol
* me_arg
;
14394 if (c
->tb
->pass_arg
)
14396 gfc_formal_arglist
* i
;
14398 /* If an explicit passing argument name is given, walk the arg-list
14399 and look for it. */
14402 c
->tb
->pass_arg_num
= 1;
14403 for (i
= c
->ts
.interface
->formal
; i
; i
= i
->next
)
14405 if (!strcmp (i
->sym
->name
, c
->tb
->pass_arg
))
14410 c
->tb
->pass_arg_num
++;
14415 gfc_error ("Procedure pointer component %qs with PASS(%s) "
14416 "at %L has no argument %qs", c
->name
,
14417 c
->tb
->pass_arg
, &c
->loc
, c
->tb
->pass_arg
);
14424 /* Otherwise, take the first one; there should in fact be at least
14426 c
->tb
->pass_arg_num
= 1;
14427 if (!c
->ts
.interface
->formal
)
14429 gfc_error ("Procedure pointer component %qs with PASS at %L "
14430 "must have at least one argument",
14435 me_arg
= c
->ts
.interface
->formal
->sym
;
14438 /* Now check that the argument-type matches. */
14439 gcc_assert (me_arg
);
14440 if ((me_arg
->ts
.type
!= BT_DERIVED
&& me_arg
->ts
.type
!= BT_CLASS
)
14441 || (me_arg
->ts
.type
== BT_DERIVED
&& me_arg
->ts
.u
.derived
!= sym
)
14442 || (me_arg
->ts
.type
== BT_CLASS
14443 && CLASS_DATA (me_arg
)->ts
.u
.derived
!= sym
))
14445 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
14446 " the derived type %qs", me_arg
->name
, c
->name
,
14447 me_arg
->name
, &c
->loc
, sym
->name
);
14452 /* Check for F03:C453. */
14453 if (CLASS_DATA (me_arg
)->attr
.dimension
)
14455 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14456 "must be scalar", me_arg
->name
, c
->name
, me_arg
->name
,
14462 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
14464 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14465 "may not have the POINTER attribute", me_arg
->name
,
14466 c
->name
, me_arg
->name
, &c
->loc
);
14471 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
14473 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14474 "may not be ALLOCATABLE", me_arg
->name
, c
->name
,
14475 me_arg
->name
, &c
->loc
);
14480 if (gfc_type_is_extensible (sym
) && me_arg
->ts
.type
!= BT_CLASS
)
14482 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
14483 " at %L", c
->name
, &c
->loc
);
14489 /* Check type-spec if this is not the parent-type component. */
14490 if (((sym
->attr
.is_class
14491 && (!sym
->components
->ts
.u
.derived
->attr
.extension
14492 || c
!= sym
->components
->ts
.u
.derived
->components
))
14493 || (!sym
->attr
.is_class
14494 && (!sym
->attr
.extension
|| c
!= sym
->components
)))
14495 && !sym
->attr
.vtype
14496 && !resolve_typespec_used (&c
->ts
, &c
->loc
, c
->name
))
14499 super_type
= gfc_get_derived_super_type (sym
);
14501 /* If this type is an extension, set the accessibility of the parent
14504 && ((sym
->attr
.is_class
14505 && c
== sym
->components
->ts
.u
.derived
->components
)
14506 || (!sym
->attr
.is_class
&& c
== sym
->components
))
14507 && strcmp (super_type
->name
, c
->name
) == 0)
14508 c
->attr
.access
= super_type
->attr
.access
;
14510 /* If this type is an extension, see if this component has the same name
14511 as an inherited type-bound procedure. */
14512 if (super_type
&& !sym
->attr
.is_class
14513 && gfc_find_typebound_proc (super_type
, NULL
, c
->name
, true, NULL
))
14515 gfc_error ("Component %qs of %qs at %L has the same name as an"
14516 " inherited type-bound procedure",
14517 c
->name
, sym
->name
, &c
->loc
);
14521 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.proc_pointer
14522 && !c
->ts
.deferred
)
14524 if (c
->ts
.u
.cl
->length
== NULL
14525 || (!resolve_charlen(c
->ts
.u
.cl
))
14526 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
))
14528 gfc_error ("Character length of component %qs needs to "
14529 "be a constant specification expression at %L",
14531 c
->ts
.u
.cl
->length
? &c
->ts
.u
.cl
->length
->where
: &c
->loc
);
14536 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.deferred
14537 && !c
->attr
.pointer
&& !c
->attr
.allocatable
)
14539 gfc_error ("Character component %qs of %qs at %L with deferred "
14540 "length must be a POINTER or ALLOCATABLE",
14541 c
->name
, sym
->name
, &c
->loc
);
14545 /* Add the hidden deferred length field. */
14546 if (c
->ts
.type
== BT_CHARACTER
14547 && (c
->ts
.deferred
|| c
->attr
.pdt_string
)
14548 && !c
->attr
.function
14549 && !sym
->attr
.is_class
)
14551 char name
[GFC_MAX_SYMBOL_LEN
+9];
14552 gfc_component
*strlen
;
14553 sprintf (name
, "_%s_length", c
->name
);
14554 strlen
= gfc_find_component (sym
, name
, true, true, NULL
);
14555 if (strlen
== NULL
)
14557 if (!gfc_add_component (sym
, name
, &strlen
))
14559 strlen
->ts
.type
= BT_INTEGER
;
14560 strlen
->ts
.kind
= gfc_charlen_int_kind
;
14561 strlen
->attr
.access
= ACCESS_PRIVATE
;
14562 strlen
->attr
.artificial
= 1;
14566 if (c
->ts
.type
== BT_DERIVED
14567 && sym
->component_access
!= ACCESS_PRIVATE
14568 && gfc_check_symbol_access (sym
)
14569 && !is_sym_host_assoc (c
->ts
.u
.derived
, sym
->ns
)
14570 && !c
->ts
.u
.derived
->attr
.use_assoc
14571 && !gfc_check_symbol_access (c
->ts
.u
.derived
)
14572 && !gfc_notify_std (GFC_STD_F2003
, "the component %qs is a "
14573 "PRIVATE type and cannot be a component of "
14574 "%qs, which is PUBLIC at %L", c
->name
,
14575 sym
->name
, &sym
->declared_at
))
14578 if ((sym
->attr
.sequence
|| sym
->attr
.is_bind_c
) && c
->ts
.type
== BT_CLASS
)
14580 gfc_error ("Polymorphic component %s at %L in SEQUENCE or BIND(C) "
14581 "type %s", c
->name
, &c
->loc
, sym
->name
);
14585 if (sym
->attr
.sequence
)
14587 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.sequence
== 0)
14589 gfc_error ("Component %s of SEQUENCE type declared at %L does "
14590 "not have the SEQUENCE attribute",
14591 c
->ts
.u
.derived
->name
, &sym
->declared_at
);
14596 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.generic
)
14597 c
->ts
.u
.derived
= gfc_find_dt_in_generic (c
->ts
.u
.derived
);
14598 else if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
14599 && CLASS_DATA (c
)->ts
.u
.derived
->attr
.generic
)
14600 CLASS_DATA (c
)->ts
.u
.derived
14601 = gfc_find_dt_in_generic (CLASS_DATA (c
)->ts
.u
.derived
);
14603 /* If an allocatable component derived type is of the same type as
14604 the enclosing derived type, we need a vtable generating so that
14605 the __deallocate procedure is created. */
14606 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
14607 && c
->ts
.u
.derived
== sym
&& c
->attr
.allocatable
== 1)
14608 gfc_find_vtab (&c
->ts
);
14610 /* Ensure that all the derived type components are put on the
14611 derived type list; even in formal namespaces, where derived type
14612 pointer components might not have been declared. */
14613 if (c
->ts
.type
== BT_DERIVED
14615 && c
->ts
.u
.derived
->components
14617 && sym
!= c
->ts
.u
.derived
)
14618 add_dt_to_dt_list (c
->ts
.u
.derived
);
14620 if (!gfc_resolve_array_spec (c
->as
,
14621 !(c
->attr
.pointer
|| c
->attr
.proc_pointer
14622 || c
->attr
.allocatable
)))
14625 if (c
->initializer
&& !sym
->attr
.vtype
14626 && !c
->attr
.pdt_kind
&& !c
->attr
.pdt_len
14627 && !gfc_check_assign_symbol (sym
, c
, c
->initializer
))
14634 /* Be nice about the locus for a structure expression - show the locus of the
14635 first non-null sub-expression if we can. */
14638 cons_where (gfc_expr
*struct_expr
)
14640 gfc_constructor
*cons
;
14642 gcc_assert (struct_expr
&& struct_expr
->expr_type
== EXPR_STRUCTURE
);
14644 cons
= gfc_constructor_first (struct_expr
->value
.constructor
);
14645 for (; cons
; cons
= gfc_constructor_next (cons
))
14647 if (cons
->expr
&& cons
->expr
->expr_type
!= EXPR_NULL
)
14648 return &cons
->expr
->where
;
14651 return &struct_expr
->where
;
14654 /* Resolve the components of a structure type. Much less work than derived
14658 resolve_fl_struct (gfc_symbol
*sym
)
14661 gfc_expr
*init
= NULL
;
14664 /* Make sure UNIONs do not have overlapping initializers. */
14665 if (sym
->attr
.flavor
== FL_UNION
)
14667 for (c
= sym
->components
; c
; c
= c
->next
)
14669 if (init
&& c
->initializer
)
14671 gfc_error ("Conflicting initializers in union at %L and %L",
14672 cons_where (init
), cons_where (c
->initializer
));
14673 gfc_free_expr (c
->initializer
);
14674 c
->initializer
= NULL
;
14677 init
= c
->initializer
;
14682 for (c
= sym
->components
; c
; c
= c
->next
)
14683 if (!resolve_component (c
, sym
))
14689 if (sym
->components
)
14690 add_dt_to_dt_list (sym
);
14696 /* Resolve the components of a derived type. This does not have to wait until
14697 resolution stage, but can be done as soon as the dt declaration has been
14701 resolve_fl_derived0 (gfc_symbol
*sym
)
14703 gfc_symbol
* super_type
;
14705 gfc_formal_arglist
*f
;
14708 if (sym
->attr
.unlimited_polymorphic
)
14711 super_type
= gfc_get_derived_super_type (sym
);
14714 if (super_type
&& sym
->attr
.coarray_comp
&& !super_type
->attr
.coarray_comp
)
14716 gfc_error ("As extending type %qs at %L has a coarray component, "
14717 "parent type %qs shall also have one", sym
->name
,
14718 &sym
->declared_at
, super_type
->name
);
14722 /* Ensure the extended type gets resolved before we do. */
14723 if (super_type
&& !resolve_fl_derived0 (super_type
))
14726 /* An ABSTRACT type must be extensible. */
14727 if (sym
->attr
.abstract
&& !gfc_type_is_extensible (sym
))
14729 gfc_error ("Non-extensible derived-type %qs at %L must not be ABSTRACT",
14730 sym
->name
, &sym
->declared_at
);
14734 c
= (sym
->attr
.is_class
) ? sym
->components
->ts
.u
.derived
->components
14738 for ( ; c
!= NULL
; c
= c
->next
)
14739 if (!resolve_component (c
, sym
))
14745 /* Now add the caf token field, where needed. */
14746 if (flag_coarray
!= GFC_FCOARRAY_NONE
14747 && !sym
->attr
.is_class
&& !sym
->attr
.vtype
)
14749 for (c
= sym
->components
; c
; c
= c
->next
)
14750 if (!c
->attr
.dimension
&& !c
->attr
.codimension
14751 && (c
->attr
.allocatable
|| c
->attr
.pointer
))
14753 char name
[GFC_MAX_SYMBOL_LEN
+9];
14754 gfc_component
*token
;
14755 sprintf (name
, "_caf_%s", c
->name
);
14756 token
= gfc_find_component (sym
, name
, true, true, NULL
);
14759 if (!gfc_add_component (sym
, name
, &token
))
14761 token
->ts
.type
= BT_VOID
;
14762 token
->ts
.kind
= gfc_default_integer_kind
;
14763 token
->attr
.access
= ACCESS_PRIVATE
;
14764 token
->attr
.artificial
= 1;
14765 token
->attr
.caf_token
= 1;
14770 check_defined_assignments (sym
);
14772 if (!sym
->attr
.defined_assign_comp
&& super_type
)
14773 sym
->attr
.defined_assign_comp
14774 = super_type
->attr
.defined_assign_comp
;
14776 /* If this is a non-ABSTRACT type extending an ABSTRACT one, ensure that
14777 all DEFERRED bindings are overridden. */
14778 if (super_type
&& super_type
->attr
.abstract
&& !sym
->attr
.abstract
14779 && !sym
->attr
.is_class
14780 && !ensure_not_abstract (sym
, super_type
))
14783 /* Check that there is a component for every PDT parameter. */
14784 if (sym
->attr
.pdt_template
)
14786 for (f
= sym
->formal
; f
; f
= f
->next
)
14790 c
= gfc_find_component (sym
, f
->sym
->name
, true, true, NULL
);
14793 gfc_error ("Parameterized type %qs does not have a component "
14794 "corresponding to parameter %qs at %L", sym
->name
,
14795 f
->sym
->name
, &sym
->declared_at
);
14801 /* Add derived type to the derived type list. */
14802 add_dt_to_dt_list (sym
);
14808 /* The following procedure does the full resolution of a derived type,
14809 including resolution of all type-bound procedures (if present). In contrast
14810 to 'resolve_fl_derived0' this can only be done after the module has been
14811 parsed completely. */
14814 resolve_fl_derived (gfc_symbol
*sym
)
14816 gfc_symbol
*gen_dt
= NULL
;
14818 if (sym
->attr
.unlimited_polymorphic
)
14821 if (!sym
->attr
.is_class
)
14822 gfc_find_symbol (sym
->name
, sym
->ns
, 0, &gen_dt
);
14823 if (gen_dt
&& gen_dt
->generic
&& gen_dt
->generic
->next
14824 && (!gen_dt
->generic
->sym
->attr
.use_assoc
14825 || gen_dt
->generic
->sym
->module
!= gen_dt
->generic
->next
->sym
->module
)
14826 && !gfc_notify_std (GFC_STD_F2003
, "Generic name %qs of function "
14827 "%qs at %L being the same name as derived "
14828 "type at %L", sym
->name
,
14829 gen_dt
->generic
->sym
== sym
14830 ? gen_dt
->generic
->next
->sym
->name
14831 : gen_dt
->generic
->sym
->name
,
14832 gen_dt
->generic
->sym
== sym
14833 ? &gen_dt
->generic
->next
->sym
->declared_at
14834 : &gen_dt
->generic
->sym
->declared_at
,
14835 &sym
->declared_at
))
14838 if (sym
->components
== NULL
&& !sym
->attr
.zero_comp
&& !sym
->attr
.use_assoc
)
14840 gfc_error ("Derived type %qs at %L has not been declared",
14841 sym
->name
, &sym
->declared_at
);
14845 /* Resolve the finalizer procedures. */
14846 if (!gfc_resolve_finalizers (sym
, NULL
))
14849 if (sym
->attr
.is_class
&& sym
->ts
.u
.derived
== NULL
)
14851 /* Fix up incomplete CLASS symbols. */
14852 gfc_component
*data
= gfc_find_component (sym
, "_data", true, true, NULL
);
14853 gfc_component
*vptr
= gfc_find_component (sym
, "_vptr", true, true, NULL
);
14855 /* Nothing more to do for unlimited polymorphic entities. */
14856 if (data
->ts
.u
.derived
->attr
.unlimited_polymorphic
)
14858 else if (vptr
->ts
.u
.derived
== NULL
)
14860 gfc_symbol
*vtab
= gfc_find_derived_vtab (data
->ts
.u
.derived
);
14862 vptr
->ts
.u
.derived
= vtab
->ts
.u
.derived
;
14863 if (!resolve_fl_derived0 (vptr
->ts
.u
.derived
))
14868 if (!resolve_fl_derived0 (sym
))
14871 /* Resolve the type-bound procedures. */
14872 if (!resolve_typebound_procedures (sym
))
14875 /* Generate module vtables subject to their accessibility and their not
14876 being vtables or pdt templates. If this is not done class declarations
14877 in external procedures wind up with their own version and so SELECT TYPE
14878 fails because the vptrs do not have the same address. */
14879 if (gfc_option
.allow_std
& GFC_STD_F2003
14880 && sym
->ns
->proc_name
14881 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14882 && sym
->attr
.access
!= ACCESS_PRIVATE
14883 && !(sym
->attr
.use_assoc
|| sym
->attr
.vtype
|| sym
->attr
.pdt_template
))
14885 gfc_symbol
*vtab
= gfc_find_derived_vtab (sym
);
14886 gfc_set_sym_referenced (vtab
);
14894 resolve_fl_namelist (gfc_symbol
*sym
)
14899 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14901 /* Check again, the check in match only works if NAMELIST comes
14903 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SIZE
)
14905 gfc_error ("Assumed size array %qs in namelist %qs at %L is not "
14906 "allowed", nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14910 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SHAPE
14911 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14912 "with assumed shape in namelist %qs at %L",
14913 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14916 if (is_non_constant_shape_array (nl
->sym
)
14917 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14918 "with nonconstant shape in namelist %qs at %L",
14919 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14922 if (nl
->sym
->ts
.type
== BT_CHARACTER
14923 && (nl
->sym
->ts
.u
.cl
->length
== NULL
14924 || !gfc_is_constant_expr (nl
->sym
->ts
.u
.cl
->length
))
14925 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs with "
14926 "nonconstant character length in "
14927 "namelist %qs at %L", nl
->sym
->name
,
14928 sym
->name
, &sym
->declared_at
))
14933 /* Reject PRIVATE objects in a PUBLIC namelist. */
14934 if (gfc_check_symbol_access (sym
))
14936 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14938 if (!nl
->sym
->attr
.use_assoc
14939 && !is_sym_host_assoc (nl
->sym
, sym
->ns
)
14940 && !gfc_check_symbol_access (nl
->sym
))
14942 gfc_error ("NAMELIST object %qs was declared PRIVATE and "
14943 "cannot be member of PUBLIC namelist %qs at %L",
14944 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14948 if (nl
->sym
->ts
.type
== BT_DERIVED
14949 && (nl
->sym
->ts
.u
.derived
->attr
.alloc_comp
14950 || nl
->sym
->ts
.u
.derived
->attr
.pointer_comp
))
14952 if (!gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs in "
14953 "namelist %qs at %L with ALLOCATABLE "
14954 "or POINTER components", nl
->sym
->name
,
14955 sym
->name
, &sym
->declared_at
))
14960 /* Types with private components that came here by USE-association. */
14961 if (nl
->sym
->ts
.type
== BT_DERIVED
14962 && derived_inaccessible (nl
->sym
->ts
.u
.derived
))
14964 gfc_error ("NAMELIST object %qs has use-associated PRIVATE "
14965 "components and cannot be member of namelist %qs at %L",
14966 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14970 /* Types with private components that are defined in the same module. */
14971 if (nl
->sym
->ts
.type
== BT_DERIVED
14972 && !is_sym_host_assoc (nl
->sym
->ts
.u
.derived
, sym
->ns
)
14973 && nl
->sym
->ts
.u
.derived
->attr
.private_comp
)
14975 gfc_error ("NAMELIST object %qs has PRIVATE components and "
14976 "cannot be a member of PUBLIC namelist %qs at %L",
14977 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14984 /* 14.1.2 A module or internal procedure represent local entities
14985 of the same type as a namelist member and so are not allowed. */
14986 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14988 if (nl
->sym
->ts
.kind
!= 0 && nl
->sym
->attr
.flavor
== FL_VARIABLE
)
14991 if (nl
->sym
->attr
.function
&& nl
->sym
== nl
->sym
->result
)
14992 if ((nl
->sym
== sym
->ns
->proc_name
)
14994 (sym
->ns
->parent
&& nl
->sym
== sym
->ns
->parent
->proc_name
))
14999 gfc_find_symbol (nl
->sym
->name
, sym
->ns
, 1, &nlsym
);
15000 if (nlsym
&& nlsym
->attr
.flavor
== FL_PROCEDURE
)
15002 gfc_error ("PROCEDURE attribute conflicts with NAMELIST "
15003 "attribute in %qs at %L", nlsym
->name
,
15004 &sym
->declared_at
);
15014 resolve_fl_parameter (gfc_symbol
*sym
)
15016 /* A parameter array's shape needs to be constant. */
15017 if (sym
->as
!= NULL
15018 && (sym
->as
->type
== AS_DEFERRED
15019 || is_non_constant_shape_array (sym
)))
15021 gfc_error ("Parameter array %qs at %L cannot be automatic "
15022 "or of deferred shape", sym
->name
, &sym
->declared_at
);
15026 /* Constraints on deferred type parameter. */
15027 if (!deferred_requirements (sym
))
15030 /* Make sure a parameter that has been implicitly typed still
15031 matches the implicit type, since PARAMETER statements can precede
15032 IMPLICIT statements. */
15033 if (sym
->attr
.implicit_type
15034 && !gfc_compare_types (&sym
->ts
, gfc_get_default_type (sym
->name
,
15037 gfc_error ("Implicitly typed PARAMETER %qs at %L doesn't match a "
15038 "later IMPLICIT type", sym
->name
, &sym
->declared_at
);
15042 /* Make sure the types of derived parameters are consistent. This
15043 type checking is deferred until resolution because the type may
15044 refer to a derived type from the host. */
15045 if (sym
->ts
.type
== BT_DERIVED
15046 && !gfc_compare_types (&sym
->ts
, &sym
->value
->ts
))
15048 gfc_error ("Incompatible derived type in PARAMETER at %L",
15049 &sym
->value
->where
);
15053 /* F03:C509,C514. */
15054 if (sym
->ts
.type
== BT_CLASS
)
15056 gfc_error ("CLASS variable %qs at %L cannot have the PARAMETER attribute",
15057 sym
->name
, &sym
->declared_at
);
15065 /* Called by resolve_symbol to check PDTs. */
15068 resolve_pdt (gfc_symbol
* sym
)
15070 gfc_symbol
*derived
= NULL
;
15071 gfc_actual_arglist
*param
;
15073 bool const_len_exprs
= true;
15074 bool assumed_len_exprs
= false;
15075 symbol_attribute
*attr
;
15077 if (sym
->ts
.type
== BT_DERIVED
)
15079 derived
= sym
->ts
.u
.derived
;
15080 attr
= &(sym
->attr
);
15082 else if (sym
->ts
.type
== BT_CLASS
)
15084 derived
= CLASS_DATA (sym
)->ts
.u
.derived
;
15085 attr
= &(CLASS_DATA (sym
)->attr
);
15088 gcc_unreachable ();
15090 gcc_assert (derived
->attr
.pdt_type
);
15092 for (param
= sym
->param_list
; param
; param
= param
->next
)
15094 c
= gfc_find_component (derived
, param
->name
, false, true, NULL
);
15096 if (c
->attr
.pdt_kind
)
15099 if (param
->expr
&& !gfc_is_constant_expr (param
->expr
)
15100 && c
->attr
.pdt_len
)
15101 const_len_exprs
= false;
15102 else if (param
->spec_type
== SPEC_ASSUMED
)
15103 assumed_len_exprs
= true;
15105 if (param
->spec_type
== SPEC_DEFERRED
15106 && !attr
->allocatable
&& !attr
->pointer
)
15107 gfc_error ("The object %qs at %L has a deferred LEN "
15108 "parameter %qs and is neither allocatable "
15109 "nor a pointer", sym
->name
, &sym
->declared_at
,
15114 if (!const_len_exprs
15115 && (sym
->ns
->proc_name
->attr
.is_main_program
15116 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15117 || sym
->attr
.save
!= SAVE_NONE
))
15118 gfc_error ("The AUTOMATIC object %qs at %L must not have the "
15119 "SAVE attribute or be a variable declared in the "
15120 "main program, a module or a submodule(F08/C513)",
15121 sym
->name
, &sym
->declared_at
);
15123 if (assumed_len_exprs
&& !(sym
->attr
.dummy
15124 || sym
->attr
.select_type_temporary
|| sym
->attr
.associate_var
))
15125 gfc_error ("The object %qs at %L with ASSUMED type parameters "
15126 "must be a dummy or a SELECT TYPE selector(F08/4.2)",
15127 sym
->name
, &sym
->declared_at
);
15131 /* Do anything necessary to resolve a symbol. Right now, we just
15132 assume that an otherwise unknown symbol is a variable. This sort
15133 of thing commonly happens for symbols in module. */
15136 resolve_symbol (gfc_symbol
*sym
)
15138 int check_constant
, mp_flag
;
15139 gfc_symtree
*symtree
;
15140 gfc_symtree
*this_symtree
;
15143 symbol_attribute class_attr
;
15144 gfc_array_spec
*as
;
15145 bool saved_specification_expr
;
15151 /* No symbol will ever have union type; only components can be unions.
15152 Union type declaration symbols have type BT_UNKNOWN but flavor FL_UNION
15153 (just like derived type declaration symbols have flavor FL_DERIVED). */
15154 gcc_assert (sym
->ts
.type
!= BT_UNION
);
15156 /* Coarrayed polymorphic objects with allocatable or pointer components are
15157 yet unsupported for -fcoarray=lib. */
15158 if (flag_coarray
== GFC_FCOARRAY_LIB
&& sym
->ts
.type
== BT_CLASS
15159 && sym
->ts
.u
.derived
&& CLASS_DATA (sym
)
15160 && CLASS_DATA (sym
)->attr
.codimension
15161 && (CLASS_DATA (sym
)->ts
.u
.derived
->attr
.alloc_comp
15162 || CLASS_DATA (sym
)->ts
.u
.derived
->attr
.pointer_comp
))
15164 gfc_error ("Sorry, allocatable/pointer components in polymorphic (CLASS) "
15165 "type coarrays at %L are unsupported", &sym
->declared_at
);
15169 if (sym
->attr
.artificial
)
15172 if (sym
->attr
.unlimited_polymorphic
)
15175 if (sym
->attr
.flavor
== FL_UNKNOWN
15176 || (sym
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.intrinsic
15177 && !sym
->attr
.generic
&& !sym
->attr
.external
15178 && sym
->attr
.if_source
== IFSRC_UNKNOWN
15179 && sym
->ts
.type
== BT_UNKNOWN
))
15182 /* If we find that a flavorless symbol is an interface in one of the
15183 parent namespaces, find its symtree in this namespace, free the
15184 symbol and set the symtree to point to the interface symbol. */
15185 for (ns
= gfc_current_ns
->parent
; ns
; ns
= ns
->parent
)
15187 symtree
= gfc_find_symtree (ns
->sym_root
, sym
->name
);
15188 if (symtree
&& (symtree
->n
.sym
->generic
||
15189 (symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
15190 && sym
->ns
->construct_entities
)))
15192 this_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
15194 if (this_symtree
->n
.sym
== sym
)
15196 symtree
->n
.sym
->refs
++;
15197 gfc_release_symbol (sym
);
15198 this_symtree
->n
.sym
= symtree
->n
.sym
;
15204 /* Otherwise give it a flavor according to such attributes as
15206 if (sym
->attr
.flavor
== FL_UNKNOWN
&& sym
->attr
.external
== 0
15207 && sym
->attr
.intrinsic
== 0)
15208 sym
->attr
.flavor
= FL_VARIABLE
;
15209 else if (sym
->attr
.flavor
== FL_UNKNOWN
)
15211 sym
->attr
.flavor
= FL_PROCEDURE
;
15212 if (sym
->attr
.dimension
)
15213 sym
->attr
.function
= 1;
15217 if (sym
->attr
.external
&& sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.function
)
15218 gfc_add_function (&sym
->attr
, sym
->name
, &sym
->declared_at
);
15220 if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
15221 && !resolve_procedure_interface (sym
))
15224 if (sym
->attr
.is_protected
&& !sym
->attr
.proc_pointer
15225 && (sym
->attr
.procedure
|| sym
->attr
.external
))
15227 if (sym
->attr
.external
)
15228 gfc_error ("PROTECTED attribute conflicts with EXTERNAL attribute "
15229 "at %L", &sym
->declared_at
);
15231 gfc_error ("PROCEDURE attribute conflicts with PROTECTED attribute "
15232 "at %L", &sym
->declared_at
);
15237 if (sym
->attr
.flavor
== FL_DERIVED
&& !resolve_fl_derived (sym
))
15240 else if ((sym
->attr
.flavor
== FL_STRUCT
|| sym
->attr
.flavor
== FL_UNION
)
15241 && !resolve_fl_struct (sym
))
15244 /* Symbols that are module procedures with results (functions) have
15245 the types and array specification copied for type checking in
15246 procedures that call them, as well as for saving to a module
15247 file. These symbols can't stand the scrutiny that their results
15249 mp_flag
= (sym
->result
!= NULL
&& sym
->result
!= sym
);
15251 /* Make sure that the intrinsic is consistent with its internal
15252 representation. This needs to be done before assigning a default
15253 type to avoid spurious warnings. */
15254 if (sym
->attr
.flavor
!= FL_MODULE
&& sym
->attr
.intrinsic
15255 && !gfc_resolve_intrinsic (sym
, &sym
->declared_at
))
15258 /* Resolve associate names. */
15260 resolve_assoc_var (sym
, true);
15262 /* Assign default type to symbols that need one and don't have one. */
15263 if (sym
->ts
.type
== BT_UNKNOWN
)
15265 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
)
15267 gfc_set_default_type (sym
, 1, NULL
);
15270 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.external
15271 && !sym
->attr
.function
&& !sym
->attr
.subroutine
15272 && gfc_get_default_type (sym
->name
, sym
->ns
)->type
== BT_UNKNOWN
)
15273 gfc_add_subroutine (&sym
->attr
, sym
->name
, &sym
->declared_at
);
15275 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
15277 /* The specific case of an external procedure should emit an error
15278 in the case that there is no implicit type. */
15281 if (!sym
->attr
.mixed_entry_master
)
15282 gfc_set_default_type (sym
, sym
->attr
.external
, NULL
);
15286 /* Result may be in another namespace. */
15287 resolve_symbol (sym
->result
);
15289 if (!sym
->result
->attr
.proc_pointer
)
15291 sym
->ts
= sym
->result
->ts
;
15292 sym
->as
= gfc_copy_array_spec (sym
->result
->as
);
15293 sym
->attr
.dimension
= sym
->result
->attr
.dimension
;
15294 sym
->attr
.pointer
= sym
->result
->attr
.pointer
;
15295 sym
->attr
.allocatable
= sym
->result
->attr
.allocatable
;
15296 sym
->attr
.contiguous
= sym
->result
->attr
.contiguous
;
15301 else if (mp_flag
&& sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
15303 bool saved_specification_expr
= specification_expr
;
15304 specification_expr
= true;
15305 gfc_resolve_array_spec (sym
->result
->as
, false);
15306 specification_expr
= saved_specification_expr
;
15309 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
15311 as
= CLASS_DATA (sym
)->as
;
15312 class_attr
= CLASS_DATA (sym
)->attr
;
15313 class_attr
.pointer
= class_attr
.class_pointer
;
15317 class_attr
= sym
->attr
;
15322 if (sym
->attr
.contiguous
15323 && (!class_attr
.dimension
15324 || (as
->type
!= AS_ASSUMED_SHAPE
&& as
->type
!= AS_ASSUMED_RANK
15325 && !class_attr
.pointer
)))
15327 gfc_error ("%qs at %L has the CONTIGUOUS attribute but is not an "
15328 "array pointer or an assumed-shape or assumed-rank array",
15329 sym
->name
, &sym
->declared_at
);
15333 /* Assumed size arrays and assumed shape arrays must be dummy
15334 arguments. Array-spec's of implied-shape should have been resolved to
15335 AS_EXPLICIT already. */
15339 /* If AS_IMPLIED_SHAPE makes it to here, it must be a bad
15340 specification expression. */
15341 if (as
->type
== AS_IMPLIED_SHAPE
)
15344 for (i
=0; i
<as
->rank
; i
++)
15346 if (as
->lower
[i
] != NULL
&& as
->upper
[i
] == NULL
)
15348 gfc_error ("Bad specification for assumed size array at %L",
15349 &as
->lower
[i
]->where
);
15356 if (((as
->type
== AS_ASSUMED_SIZE
&& !as
->cp_was_assumed
)
15357 || as
->type
== AS_ASSUMED_SHAPE
)
15358 && !sym
->attr
.dummy
&& !sym
->attr
.select_type_temporary
)
15360 if (as
->type
== AS_ASSUMED_SIZE
)
15361 gfc_error ("Assumed size array at %L must be a dummy argument",
15362 &sym
->declared_at
);
15364 gfc_error ("Assumed shape array at %L must be a dummy argument",
15365 &sym
->declared_at
);
15368 /* TS 29113, C535a. */
15369 if (as
->type
== AS_ASSUMED_RANK
&& !sym
->attr
.dummy
15370 && !sym
->attr
.select_type_temporary
15371 && !(cs_base
&& cs_base
->current
15372 && cs_base
->current
->op
== EXEC_SELECT_RANK
))
15374 gfc_error ("Assumed-rank array at %L must be a dummy argument",
15375 &sym
->declared_at
);
15378 if (as
->type
== AS_ASSUMED_RANK
15379 && (sym
->attr
.codimension
|| sym
->attr
.value
))
15381 gfc_error ("Assumed-rank array at %L may not have the VALUE or "
15382 "CODIMENSION attribute", &sym
->declared_at
);
15387 /* Make sure symbols with known intent or optional are really dummy
15388 variable. Because of ENTRY statement, this has to be deferred
15389 until resolution time. */
15391 if (!sym
->attr
.dummy
15392 && (sym
->attr
.optional
|| sym
->attr
.intent
!= INTENT_UNKNOWN
))
15394 gfc_error ("Symbol at %L is not a DUMMY variable", &sym
->declared_at
);
15398 if (sym
->attr
.value
&& !sym
->attr
.dummy
)
15400 gfc_error ("%qs at %L cannot have the VALUE attribute because "
15401 "it is not a dummy argument", sym
->name
, &sym
->declared_at
);
15405 if (sym
->attr
.value
&& sym
->ts
.type
== BT_CHARACTER
)
15407 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
15408 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
15410 gfc_error ("Character dummy variable %qs at %L with VALUE "
15411 "attribute must have constant length",
15412 sym
->name
, &sym
->declared_at
);
15416 if (sym
->ts
.is_c_interop
15417 && mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
15419 gfc_error ("C interoperable character dummy variable %qs at %L "
15420 "with VALUE attribute must have length one",
15421 sym
->name
, &sym
->declared_at
);
15426 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15427 && sym
->ts
.u
.derived
->attr
.generic
)
15429 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
15430 if (!sym
->ts
.u
.derived
)
15432 gfc_error ("The derived type %qs at %L is of type %qs, "
15433 "which has not been defined", sym
->name
,
15434 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15435 sym
->ts
.type
= BT_UNKNOWN
;
15440 /* Use the same constraints as TYPE(*), except for the type check
15441 and that only scalars and assumed-size arrays are permitted. */
15442 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
15444 if (!sym
->attr
.dummy
)
15446 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
15447 "a dummy argument", sym
->name
, &sym
->declared_at
);
15451 if (sym
->ts
.type
!= BT_ASSUMED
&& sym
->ts
.type
!= BT_INTEGER
15452 && sym
->ts
.type
!= BT_REAL
&& sym
->ts
.type
!= BT_LOGICAL
15453 && sym
->ts
.type
!= BT_COMPLEX
)
15455 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
15456 "of type TYPE(*) or of an numeric intrinsic type",
15457 sym
->name
, &sym
->declared_at
);
15461 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
15462 || sym
->attr
.pointer
|| sym
->attr
.value
)
15464 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
15465 "have the ALLOCATABLE, CODIMENSION, POINTER or VALUE "
15466 "attribute", sym
->name
, &sym
->declared_at
);
15470 if (sym
->attr
.intent
== INTENT_OUT
)
15472 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
15473 "have the INTENT(OUT) attribute",
15474 sym
->name
, &sym
->declared_at
);
15477 if (sym
->attr
.dimension
&& sym
->as
->type
!= AS_ASSUMED_SIZE
)
15479 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall "
15480 "either be a scalar or an assumed-size array",
15481 sym
->name
, &sym
->declared_at
);
15485 /* Set the type to TYPE(*) and add a dimension(*) to ensure
15486 NO_ARG_CHECK is correctly handled in trans*.c, e.g. with
15488 sym
->ts
.type
= BT_ASSUMED
;
15489 sym
->as
= gfc_get_array_spec ();
15490 sym
->as
->type
= AS_ASSUMED_SIZE
;
15492 sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
15494 else if (sym
->ts
.type
== BT_ASSUMED
)
15496 /* TS 29113, C407a. */
15497 if (!sym
->attr
.dummy
)
15499 gfc_error ("Assumed type of variable %s at %L is only permitted "
15500 "for dummy variables", sym
->name
, &sym
->declared_at
);
15503 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
15504 || sym
->attr
.pointer
|| sym
->attr
.value
)
15506 gfc_error ("Assumed-type variable %s at %L may not have the "
15507 "ALLOCATABLE, CODIMENSION, POINTER or VALUE attribute",
15508 sym
->name
, &sym
->declared_at
);
15511 if (sym
->attr
.intent
== INTENT_OUT
)
15513 gfc_error ("Assumed-type variable %s at %L may not have the "
15514 "INTENT(OUT) attribute",
15515 sym
->name
, &sym
->declared_at
);
15518 if (sym
->attr
.dimension
&& sym
->as
->type
== AS_EXPLICIT
)
15520 gfc_error ("Assumed-type variable %s at %L shall not be an "
15521 "explicit-shape array", sym
->name
, &sym
->declared_at
);
15526 /* If the symbol is marked as bind(c), that it is declared at module level
15527 scope and verify its type and kind. Do not do the latter for symbols
15528 that are implicitly typed because that is handled in
15529 gfc_set_default_type. Handle dummy arguments and procedure definitions
15530 separately. Also, anything that is use associated is not handled here
15531 but instead is handled in the module it is declared in. Finally, derived
15532 type definitions are allowed to be BIND(C) since that only implies that
15533 they're interoperable, and they are checked fully for interoperability
15534 when a variable is declared of that type. */
15535 if (sym
->attr
.is_bind_c
&& sym
->attr
.use_assoc
== 0
15536 && sym
->attr
.dummy
== 0 && sym
->attr
.flavor
!= FL_PROCEDURE
15537 && sym
->attr
.flavor
!= FL_DERIVED
)
15541 /* First, make sure the variable is declared at the
15542 module-level scope (J3/04-007, Section 15.3). */
15543 if (sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
&&
15544 sym
->attr
.in_common
== 0)
15546 gfc_error ("Variable %qs at %L cannot be BIND(C) because it "
15547 "is neither a COMMON block nor declared at the "
15548 "module level scope", sym
->name
, &(sym
->declared_at
));
15551 else if (sym
->ts
.type
== BT_CHARACTER
15552 && (sym
->ts
.u
.cl
== NULL
|| sym
->ts
.u
.cl
->length
== NULL
15553 || !gfc_is_constant_expr (sym
->ts
.u
.cl
->length
)
15554 || mpz_cmp_si (sym
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
15556 gfc_error ("BIND(C) Variable %qs at %L must have length one",
15557 sym
->name
, &sym
->declared_at
);
15560 else if (sym
->common_head
!= NULL
&& sym
->attr
.implicit_type
== 0)
15562 t
= verify_com_block_vars_c_interop (sym
->common_head
);
15564 else if (sym
->attr
.implicit_type
== 0)
15566 /* If type() declaration, we need to verify that the components
15567 of the given type are all C interoperable, etc. */
15568 if (sym
->ts
.type
== BT_DERIVED
&&
15569 sym
->ts
.u
.derived
->attr
.is_c_interop
!= 1)
15571 /* Make sure the user marked the derived type as BIND(C). If
15572 not, call the verify routine. This could print an error
15573 for the derived type more than once if multiple variables
15574 of that type are declared. */
15575 if (sym
->ts
.u
.derived
->attr
.is_bind_c
!= 1)
15576 verify_bind_c_derived_type (sym
->ts
.u
.derived
);
15580 /* Verify the variable itself as C interoperable if it
15581 is BIND(C). It is not possible for this to succeed if
15582 the verify_bind_c_derived_type failed, so don't have to handle
15583 any error returned by verify_bind_c_derived_type. */
15584 t
= verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
15585 sym
->common_block
);
15590 /* clear the is_bind_c flag to prevent reporting errors more than
15591 once if something failed. */
15592 sym
->attr
.is_bind_c
= 0;
15597 /* If a derived type symbol has reached this point, without its
15598 type being declared, we have an error. Notice that most
15599 conditions that produce undefined derived types have already
15600 been dealt with. However, the likes of:
15601 implicit type(t) (t) ..... call foo (t) will get us here if
15602 the type is not declared in the scope of the implicit
15603 statement. Change the type to BT_UNKNOWN, both because it is so
15604 and to prevent an ICE. */
15605 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15606 && sym
->ts
.u
.derived
->components
== NULL
15607 && !sym
->ts
.u
.derived
->attr
.zero_comp
)
15609 gfc_error ("The derived type %qs at %L is of type %qs, "
15610 "which has not been defined", sym
->name
,
15611 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15612 sym
->ts
.type
= BT_UNKNOWN
;
15616 /* Make sure that the derived type has been resolved and that the
15617 derived type is visible in the symbol's namespace, if it is a
15618 module function and is not PRIVATE. */
15619 if (sym
->ts
.type
== BT_DERIVED
15620 && sym
->ts
.u
.derived
->attr
.use_assoc
15621 && sym
->ns
->proc_name
15622 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15623 && !resolve_fl_derived (sym
->ts
.u
.derived
))
15626 /* Unless the derived-type declaration is use associated, Fortran 95
15627 does not allow public entries of private derived types.
15628 See 4.4.1 (F95) and 4.5.1.1 (F2003); and related interpretation
15629 161 in 95-006r3. */
15630 if (sym
->ts
.type
== BT_DERIVED
15631 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15632 && !sym
->ts
.u
.derived
->attr
.use_assoc
15633 && gfc_check_symbol_access (sym
)
15634 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
15635 && !gfc_notify_std (GFC_STD_F2003
, "PUBLIC %s %qs at %L of PRIVATE "
15636 "derived type %qs",
15637 (sym
->attr
.flavor
== FL_PARAMETER
)
15638 ? "parameter" : "variable",
15639 sym
->name
, &sym
->declared_at
,
15640 sym
->ts
.u
.derived
->name
))
15643 /* F2008, C1302. */
15644 if (sym
->ts
.type
== BT_DERIVED
15645 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15646 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
15647 || sym
->ts
.u
.derived
->attr
.lock_comp
)
15648 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15650 gfc_error ("Variable %s at %L of type LOCK_TYPE or with subcomponent of "
15651 "type LOCK_TYPE must be a coarray", sym
->name
,
15652 &sym
->declared_at
);
15656 /* TS18508, C702/C703. */
15657 if (sym
->ts
.type
== BT_DERIVED
15658 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15659 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
15660 || sym
->ts
.u
.derived
->attr
.event_comp
)
15661 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15663 gfc_error ("Variable %s at %L of type EVENT_TYPE or with subcomponent of "
15664 "type EVENT_TYPE must be a coarray", sym
->name
,
15665 &sym
->declared_at
);
15669 /* An assumed-size array with INTENT(OUT) shall not be of a type for which
15670 default initialization is defined (5.1.2.4.4). */
15671 if (sym
->ts
.type
== BT_DERIVED
15673 && sym
->attr
.intent
== INTENT_OUT
15675 && sym
->as
->type
== AS_ASSUMED_SIZE
)
15677 for (c
= sym
->ts
.u
.derived
->components
; c
; c
= c
->next
)
15679 if (c
->initializer
)
15681 gfc_error ("The INTENT(OUT) dummy argument %qs at %L is "
15682 "ASSUMED SIZE and so cannot have a default initializer",
15683 sym
->name
, &sym
->declared_at
);
15690 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15691 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.lock_comp
)
15693 gfc_error ("Dummy argument %qs at %L of LOCK_TYPE shall not be "
15694 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15699 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15700 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.event_comp
)
15702 gfc_error ("Dummy argument %qs at %L of EVENT_TYPE shall not be "
15703 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15708 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15709 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15710 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15711 || class_attr
.codimension
)
15712 && (sym
->attr
.result
|| sym
->result
== sym
))
15714 gfc_error ("Function result %qs at %L shall not be a coarray or have "
15715 "a coarray component", sym
->name
, &sym
->declared_at
);
15720 if (sym
->attr
.codimension
&& sym
->ts
.type
== BT_DERIVED
15721 && sym
->ts
.u
.derived
->ts
.is_iso_c
)
15723 gfc_error ("Variable %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
15724 "shall not be a coarray", sym
->name
, &sym
->declared_at
);
15729 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15730 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15731 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15732 && (class_attr
.codimension
|| class_attr
.pointer
|| class_attr
.dimension
15733 || class_attr
.allocatable
))
15735 gfc_error ("Variable %qs at %L with coarray component shall be a "
15736 "nonpointer, nonallocatable scalar, which is not a coarray",
15737 sym
->name
, &sym
->declared_at
);
15741 /* F2008, C526. The function-result case was handled above. */
15742 if (class_attr
.codimension
15743 && !(class_attr
.allocatable
|| sym
->attr
.dummy
|| sym
->attr
.save
15744 || sym
->attr
.select_type_temporary
15745 || sym
->attr
.associate_var
15746 || (sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15747 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15748 || sym
->ns
->proc_name
->attr
.is_main_program
15749 || sym
->attr
.function
|| sym
->attr
.result
|| sym
->attr
.use_assoc
))
15751 gfc_error ("Variable %qs at %L is a coarray and is not ALLOCATABLE, SAVE "
15752 "nor a dummy argument", sym
->name
, &sym
->declared_at
);
15756 else if (class_attr
.codimension
&& !sym
->attr
.select_type_temporary
15757 && !class_attr
.allocatable
&& as
&& as
->cotype
== AS_DEFERRED
)
15759 gfc_error ("Coarray variable %qs at %L shall not have codimensions with "
15760 "deferred shape", sym
->name
, &sym
->declared_at
);
15763 else if (class_attr
.codimension
&& class_attr
.allocatable
&& as
15764 && (as
->cotype
!= AS_DEFERRED
|| as
->type
!= AS_DEFERRED
))
15766 gfc_error ("Allocatable coarray variable %qs at %L must have "
15767 "deferred shape", sym
->name
, &sym
->declared_at
);
15772 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15773 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15774 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15775 || (class_attr
.codimension
&& class_attr
.allocatable
))
15776 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
)
15778 gfc_error ("Variable %qs at %L is INTENT(OUT) and can thus not be an "
15779 "allocatable coarray or have coarray components",
15780 sym
->name
, &sym
->declared_at
);
15784 if (class_attr
.codimension
&& sym
->attr
.dummy
15785 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.is_bind_c
)
15787 gfc_error ("Coarray dummy variable %qs at %L not allowed in BIND(C) "
15788 "procedure %qs", sym
->name
, &sym
->declared_at
,
15789 sym
->ns
->proc_name
->name
);
15793 if (sym
->ts
.type
== BT_LOGICAL
15794 && ((sym
->attr
.function
&& sym
->attr
.is_bind_c
&& sym
->result
== sym
)
15795 || ((sym
->attr
.dummy
|| sym
->attr
.result
) && sym
->ns
->proc_name
15796 && sym
->ns
->proc_name
->attr
.is_bind_c
)))
15799 for (i
= 0; gfc_logical_kinds
[i
].kind
; i
++)
15800 if (gfc_logical_kinds
[i
].kind
== sym
->ts
.kind
)
15802 if (!gfc_logical_kinds
[i
].c_bool
&& sym
->attr
.dummy
15803 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL dummy argument %qs at "
15804 "%L with non-C_Bool kind in BIND(C) procedure "
15805 "%qs", sym
->name
, &sym
->declared_at
,
15806 sym
->ns
->proc_name
->name
))
15808 else if (!gfc_logical_kinds
[i
].c_bool
15809 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL result variable "
15810 "%qs at %L with non-C_Bool kind in "
15811 "BIND(C) procedure %qs", sym
->name
,
15813 sym
->attr
.function
? sym
->name
15814 : sym
->ns
->proc_name
->name
))
15818 switch (sym
->attr
.flavor
)
15821 if (!resolve_fl_variable (sym
, mp_flag
))
15826 if (sym
->formal
&& !sym
->formal_ns
)
15828 /* Check that none of the arguments are a namelist. */
15829 gfc_formal_arglist
*formal
= sym
->formal
;
15831 for (; formal
; formal
= formal
->next
)
15832 if (formal
->sym
&& formal
->sym
->attr
.flavor
== FL_NAMELIST
)
15834 gfc_error ("Namelist %qs cannot be an argument to "
15835 "subroutine or function at %L",
15836 formal
->sym
->name
, &sym
->declared_at
);
15841 if (!resolve_fl_procedure (sym
, mp_flag
))
15846 if (!resolve_fl_namelist (sym
))
15851 if (!resolve_fl_parameter (sym
))
15859 /* Resolve array specifier. Check as well some constraints
15860 on COMMON blocks. */
15862 check_constant
= sym
->attr
.in_common
&& !sym
->attr
.pointer
;
15864 /* Set the formal_arg_flag so that check_conflict will not throw
15865 an error for host associated variables in the specification
15866 expression for an array_valued function. */
15867 if ((sym
->attr
.function
|| sym
->attr
.result
) && sym
->as
)
15868 formal_arg_flag
= true;
15870 saved_specification_expr
= specification_expr
;
15871 specification_expr
= true;
15872 gfc_resolve_array_spec (sym
->as
, check_constant
);
15873 specification_expr
= saved_specification_expr
;
15875 formal_arg_flag
= false;
15877 /* Resolve formal namespaces. */
15878 if (sym
->formal_ns
&& sym
->formal_ns
!= gfc_current_ns
15879 && !sym
->attr
.contained
&& !sym
->attr
.intrinsic
)
15880 gfc_resolve (sym
->formal_ns
);
15882 /* Make sure the formal namespace is present. */
15883 if (sym
->formal
&& !sym
->formal_ns
)
15885 gfc_formal_arglist
*formal
= sym
->formal
;
15886 while (formal
&& !formal
->sym
)
15887 formal
= formal
->next
;
15891 sym
->formal_ns
= formal
->sym
->ns
;
15892 if (sym
->ns
!= formal
->sym
->ns
)
15893 sym
->formal_ns
->refs
++;
15897 /* Check threadprivate restrictions. */
15898 if (sym
->attr
.threadprivate
&& !sym
->attr
.save
15899 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15900 && (!sym
->attr
.in_common
15901 && sym
->module
== NULL
15902 && (sym
->ns
->proc_name
== NULL
15903 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15904 gfc_error ("Threadprivate at %L isn't SAVEd", &sym
->declared_at
);
15906 /* Check omp declare target restrictions. */
15907 if (sym
->attr
.omp_declare_target
15908 && sym
->attr
.flavor
== FL_VARIABLE
15910 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15911 && (!sym
->attr
.in_common
15912 && sym
->module
== NULL
15913 && (sym
->ns
->proc_name
== NULL
15914 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15915 gfc_error ("!$OMP DECLARE TARGET variable %qs at %L isn't SAVEd",
15916 sym
->name
, &sym
->declared_at
);
15918 /* If we have come this far we can apply default-initializers, as
15919 described in 14.7.5, to those variables that have not already
15920 been assigned one. */
15921 if (sym
->ts
.type
== BT_DERIVED
15923 && !sym
->attr
.allocatable
15924 && !sym
->attr
.alloc_comp
)
15926 symbol_attribute
*a
= &sym
->attr
;
15928 if ((!a
->save
&& !a
->dummy
&& !a
->pointer
15929 && !a
->in_common
&& !a
->use_assoc
15931 && !((a
->function
|| a
->result
)
15933 || sym
->ts
.u
.derived
->attr
.alloc_comp
15934 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15935 && !(a
->function
&& sym
!= sym
->result
))
15936 || (a
->dummy
&& a
->intent
== INTENT_OUT
&& !a
->pointer
))
15937 apply_default_init (sym
);
15938 else if (a
->function
&& sym
->result
&& a
->access
!= ACCESS_PRIVATE
15939 && (sym
->ts
.u
.derived
->attr
.alloc_comp
15940 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15941 /* Mark the result symbol to be referenced, when it has allocatable
15943 sym
->result
->attr
.referenced
= 1;
15946 if (sym
->ts
.type
== BT_CLASS
&& sym
->ns
== gfc_current_ns
15947 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
15948 && !CLASS_DATA (sym
)->attr
.class_pointer
15949 && !CLASS_DATA (sym
)->attr
.allocatable
)
15950 apply_default_init (sym
);
15952 /* If this symbol has a type-spec, check it. */
15953 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
15954 || (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
))
15955 if (!resolve_typespec_used (&sym
->ts
, &sym
->declared_at
, sym
->name
))
15958 if (sym
->param_list
)
15963 /************* Resolve DATA statements *************/
15967 gfc_data_value
*vnode
;
15973 /* Advance the values structure to point to the next value in the data list. */
15976 next_data_value (void)
15978 while (mpz_cmp_ui (values
.left
, 0) == 0)
15981 if (values
.vnode
->next
== NULL
)
15984 values
.vnode
= values
.vnode
->next
;
15985 mpz_set (values
.left
, values
.vnode
->repeat
);
15993 check_data_variable (gfc_data_variable
*var
, locus
*where
)
15999 ar_type mark
= AR_UNKNOWN
;
16001 mpz_t section_index
[GFC_MAX_DIMENSIONS
];
16007 if (!gfc_resolve_expr (var
->expr
))
16011 mpz_init_set_si (offset
, 0);
16014 if (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
16015 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
16016 e
= e
->value
.function
.actual
->expr
;
16018 if (e
->expr_type
!= EXPR_VARIABLE
)
16020 gfc_error ("Expecting definable entity near %L", where
);
16024 sym
= e
->symtree
->n
.sym
;
16026 if (sym
->ns
->is_block_data
&& !sym
->attr
.in_common
)
16028 gfc_error ("BLOCK DATA element %qs at %L must be in COMMON",
16029 sym
->name
, &sym
->declared_at
);
16033 if (e
->ref
== NULL
&& sym
->as
)
16035 gfc_error ("DATA array %qs at %L must be specified in a previous"
16036 " declaration", sym
->name
, where
);
16040 if (gfc_is_coindexed (e
))
16042 gfc_error ("DATA element %qs at %L cannot have a coindex", sym
->name
,
16047 has_pointer
= sym
->attr
.pointer
;
16049 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
16051 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.pointer
)
16056 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.type
!= AR_FULL
)
16058 gfc_error ("DATA element %qs at %L is a pointer and so must "
16059 "be a full array", sym
->name
, where
);
16063 if (values
.vnode
->expr
->expr_type
== EXPR_CONSTANT
)
16065 gfc_error ("DATA object near %L has the pointer attribute "
16066 "and the corresponding DATA value is not a valid "
16067 "initial-data-target", where
);
16073 if (e
->rank
== 0 || has_pointer
)
16075 mpz_init_set_ui (size
, 1);
16082 /* Find the array section reference. */
16083 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
16085 if (ref
->type
!= REF_ARRAY
)
16087 if (ref
->u
.ar
.type
== AR_ELEMENT
)
16093 /* Set marks according to the reference pattern. */
16094 switch (ref
->u
.ar
.type
)
16102 /* Get the start position of array section. */
16103 gfc_get_section_index (ar
, section_index
, &offset
);
16108 gcc_unreachable ();
16111 if (!gfc_array_size (e
, &size
))
16113 gfc_error ("Nonconstant array section at %L in DATA statement",
16115 mpz_clear (offset
);
16122 while (mpz_cmp_ui (size
, 0) > 0)
16124 if (!next_data_value ())
16126 gfc_error ("DATA statement at %L has more variables than values",
16132 t
= gfc_check_assign (var
->expr
, values
.vnode
->expr
, 0);
16136 /* If we have more than one element left in the repeat count,
16137 and we have more than one element left in the target variable,
16138 then create a range assignment. */
16139 /* FIXME: Only done for full arrays for now, since array sections
16141 if (mark
== AR_FULL
&& ref
&& ref
->next
== NULL
16142 && mpz_cmp_ui (values
.left
, 1) > 0 && mpz_cmp_ui (size
, 1) > 0)
16146 if (mpz_cmp (size
, values
.left
) >= 0)
16148 mpz_init_set (range
, values
.left
);
16149 mpz_sub (size
, size
, values
.left
);
16150 mpz_set_ui (values
.left
, 0);
16154 mpz_init_set (range
, size
);
16155 mpz_sub (values
.left
, values
.left
, size
);
16156 mpz_set_ui (size
, 0);
16159 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
16162 mpz_add (offset
, offset
, range
);
16169 /* Assign initial value to symbol. */
16172 mpz_sub_ui (values
.left
, values
.left
, 1);
16173 mpz_sub_ui (size
, size
, 1);
16175 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
16180 if (mark
== AR_FULL
)
16181 mpz_add_ui (offset
, offset
, 1);
16183 /* Modify the array section indexes and recalculate the offset
16184 for next element. */
16185 else if (mark
== AR_SECTION
)
16186 gfc_advance_section (section_index
, ar
, &offset
);
16190 if (mark
== AR_SECTION
)
16192 for (i
= 0; i
< ar
->dimen
; i
++)
16193 mpz_clear (section_index
[i
]);
16197 mpz_clear (offset
);
16203 static bool traverse_data_var (gfc_data_variable
*, locus
*);
16205 /* Iterate over a list of elements in a DATA statement. */
16208 traverse_data_list (gfc_data_variable
*var
, locus
*where
)
16211 iterator_stack frame
;
16212 gfc_expr
*e
, *start
, *end
, *step
;
16213 bool retval
= true;
16215 mpz_init (frame
.value
);
16218 start
= gfc_copy_expr (var
->iter
.start
);
16219 end
= gfc_copy_expr (var
->iter
.end
);
16220 step
= gfc_copy_expr (var
->iter
.step
);
16222 if (!gfc_simplify_expr (start
, 1)
16223 || start
->expr_type
!= EXPR_CONSTANT
)
16225 gfc_error ("start of implied-do loop at %L could not be "
16226 "simplified to a constant value", &start
->where
);
16230 if (!gfc_simplify_expr (end
, 1)
16231 || end
->expr_type
!= EXPR_CONSTANT
)
16233 gfc_error ("end of implied-do loop at %L could not be "
16234 "simplified to a constant value", &start
->where
);
16238 if (!gfc_simplify_expr (step
, 1)
16239 || step
->expr_type
!= EXPR_CONSTANT
)
16241 gfc_error ("step of implied-do loop at %L could not be "
16242 "simplified to a constant value", &start
->where
);
16247 mpz_set (trip
, end
->value
.integer
);
16248 mpz_sub (trip
, trip
, start
->value
.integer
);
16249 mpz_add (trip
, trip
, step
->value
.integer
);
16251 mpz_div (trip
, trip
, step
->value
.integer
);
16253 mpz_set (frame
.value
, start
->value
.integer
);
16255 frame
.prev
= iter_stack
;
16256 frame
.variable
= var
->iter
.var
->symtree
;
16257 iter_stack
= &frame
;
16259 while (mpz_cmp_ui (trip
, 0) > 0)
16261 if (!traverse_data_var (var
->list
, where
))
16267 e
= gfc_copy_expr (var
->expr
);
16268 if (!gfc_simplify_expr (e
, 1))
16275 mpz_add (frame
.value
, frame
.value
, step
->value
.integer
);
16277 mpz_sub_ui (trip
, trip
, 1);
16281 mpz_clear (frame
.value
);
16284 gfc_free_expr (start
);
16285 gfc_free_expr (end
);
16286 gfc_free_expr (step
);
16288 iter_stack
= frame
.prev
;
16293 /* Type resolve variables in the variable list of a DATA statement. */
16296 traverse_data_var (gfc_data_variable
*var
, locus
*where
)
16300 for (; var
; var
= var
->next
)
16302 if (var
->expr
== NULL
)
16303 t
= traverse_data_list (var
, where
);
16305 t
= check_data_variable (var
, where
);
16315 /* Resolve the expressions and iterators associated with a data statement.
16316 This is separate from the assignment checking because data lists should
16317 only be resolved once. */
16320 resolve_data_variables (gfc_data_variable
*d
)
16322 for (; d
; d
= d
->next
)
16324 if (d
->list
== NULL
)
16326 if (!gfc_resolve_expr (d
->expr
))
16331 if (!gfc_resolve_iterator (&d
->iter
, false, true))
16334 if (!resolve_data_variables (d
->list
))
16343 /* Resolve a single DATA statement. We implement this by storing a pointer to
16344 the value list into static variables, and then recursively traversing the
16345 variables list, expanding iterators and such. */
16348 resolve_data (gfc_data
*d
)
16351 if (!resolve_data_variables (d
->var
))
16354 values
.vnode
= d
->value
;
16355 if (d
->value
== NULL
)
16356 mpz_set_ui (values
.left
, 0);
16358 mpz_set (values
.left
, d
->value
->repeat
);
16360 if (!traverse_data_var (d
->var
, &d
->where
))
16363 /* At this point, we better not have any values left. */
16365 if (next_data_value ())
16366 gfc_error ("DATA statement at %L has more values than variables",
16371 /* 12.6 Constraint: In a pure subprogram any variable which is in common or
16372 accessed by host or use association, is a dummy argument to a pure function,
16373 is a dummy argument with INTENT (IN) to a pure subroutine, or an object that
16374 is storage associated with any such variable, shall not be used in the
16375 following contexts: (clients of this function). */
16377 /* Determines if a variable is not 'pure', i.e., not assignable within a pure
16378 procedure. Returns zero if assignment is OK, nonzero if there is a
16381 gfc_impure_variable (gfc_symbol
*sym
)
16386 if (sym
->attr
.use_assoc
|| sym
->attr
.in_common
)
16389 /* Check if the symbol's ns is inside the pure procedure. */
16390 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16394 if (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.function
)
16398 proc
= sym
->ns
->proc_name
;
16399 if (sym
->attr
.dummy
16400 && ((proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_IN
)
16401 || proc
->attr
.function
))
16404 /* TODO: Sort out what can be storage associated, if anything, and include
16405 it here. In principle equivalences should be scanned but it does not
16406 seem to be possible to storage associate an impure variable this way. */
16411 /* Test whether a symbol is pure or not. For a NULL pointer, checks if the
16412 current namespace is inside a pure procedure. */
16415 gfc_pure (gfc_symbol
*sym
)
16417 symbol_attribute attr
;
16422 /* Check if the current namespace or one of its parents
16423 belongs to a pure procedure. */
16424 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16426 sym
= ns
->proc_name
;
16430 if (attr
.flavor
== FL_PROCEDURE
&& attr
.pure
)
16438 return attr
.flavor
== FL_PROCEDURE
&& attr
.pure
;
16442 /* Test whether a symbol is implicitly pure or not. For a NULL pointer,
16443 checks if the current namespace is implicitly pure. Note that this
16444 function returns false for a PURE procedure. */
16447 gfc_implicit_pure (gfc_symbol
*sym
)
16453 /* Check if the current procedure is implicit_pure. Walk up
16454 the procedure list until we find a procedure. */
16455 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16457 sym
= ns
->proc_name
;
16461 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16466 return sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.implicit_pure
16467 && !sym
->attr
.pure
;
16472 gfc_unset_implicit_pure (gfc_symbol
*sym
)
16478 /* Check if the current procedure is implicit_pure. Walk up
16479 the procedure list until we find a procedure. */
16480 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16482 sym
= ns
->proc_name
;
16486 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16491 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16492 sym
->attr
.implicit_pure
= 0;
16494 sym
->attr
.pure
= 0;
16498 /* Test whether the current procedure is elemental or not. */
16501 gfc_elemental (gfc_symbol
*sym
)
16503 symbol_attribute attr
;
16506 sym
= gfc_current_ns
->proc_name
;
16511 return attr
.flavor
== FL_PROCEDURE
&& attr
.elemental
;
16515 /* Warn about unused labels. */
16518 warn_unused_fortran_label (gfc_st_label
*label
)
16523 warn_unused_fortran_label (label
->left
);
16525 if (label
->defined
== ST_LABEL_UNKNOWN
)
16528 switch (label
->referenced
)
16530 case ST_LABEL_UNKNOWN
:
16531 gfc_warning (OPT_Wunused_label
, "Label %d at %L defined but not used",
16532 label
->value
, &label
->where
);
16535 case ST_LABEL_BAD_TARGET
:
16536 gfc_warning (OPT_Wunused_label
,
16537 "Label %d at %L defined but cannot be used",
16538 label
->value
, &label
->where
);
16545 warn_unused_fortran_label (label
->right
);
16549 /* Returns the sequence type of a symbol or sequence. */
16552 sequence_type (gfc_typespec ts
)
16561 if (ts
.u
.derived
->components
== NULL
)
16562 return SEQ_NONDEFAULT
;
16564 result
= sequence_type (ts
.u
.derived
->components
->ts
);
16565 for (c
= ts
.u
.derived
->components
->next
; c
; c
= c
->next
)
16566 if (sequence_type (c
->ts
) != result
)
16572 if (ts
.kind
!= gfc_default_character_kind
)
16573 return SEQ_NONDEFAULT
;
16575 return SEQ_CHARACTER
;
16578 if (ts
.kind
!= gfc_default_integer_kind
)
16579 return SEQ_NONDEFAULT
;
16581 return SEQ_NUMERIC
;
16584 if (!(ts
.kind
== gfc_default_real_kind
16585 || ts
.kind
== gfc_default_double_kind
))
16586 return SEQ_NONDEFAULT
;
16588 return SEQ_NUMERIC
;
16591 if (ts
.kind
!= gfc_default_complex_kind
)
16592 return SEQ_NONDEFAULT
;
16594 return SEQ_NUMERIC
;
16597 if (ts
.kind
!= gfc_default_logical_kind
)
16598 return SEQ_NONDEFAULT
;
16600 return SEQ_NUMERIC
;
16603 return SEQ_NONDEFAULT
;
16608 /* Resolve derived type EQUIVALENCE object. */
16611 resolve_equivalence_derived (gfc_symbol
*derived
, gfc_symbol
*sym
, gfc_expr
*e
)
16613 gfc_component
*c
= derived
->components
;
16618 /* Shall not be an object of nonsequence derived type. */
16619 if (!derived
->attr
.sequence
)
16621 gfc_error ("Derived type variable %qs at %L must have SEQUENCE "
16622 "attribute to be an EQUIVALENCE object", sym
->name
,
16627 /* Shall not have allocatable components. */
16628 if (derived
->attr
.alloc_comp
)
16630 gfc_error ("Derived type variable %qs at %L cannot have ALLOCATABLE "
16631 "components to be an EQUIVALENCE object",sym
->name
,
16636 if (sym
->attr
.in_common
&& gfc_has_default_initializer (sym
->ts
.u
.derived
))
16638 gfc_error ("Derived type variable %qs at %L with default "
16639 "initialization cannot be in EQUIVALENCE with a variable "
16640 "in COMMON", sym
->name
, &e
->where
);
16644 for (; c
; c
= c
->next
)
16646 if (gfc_bt_struct (c
->ts
.type
)
16647 && (!resolve_equivalence_derived(c
->ts
.u
.derived
, sym
, e
)))
16650 /* Shall not be an object of sequence derived type containing a pointer
16651 in the structure. */
16652 if (c
->attr
.pointer
)
16654 gfc_error ("Derived type variable %qs at %L with pointer "
16655 "component(s) cannot be an EQUIVALENCE object",
16656 sym
->name
, &e
->where
);
16664 /* Resolve equivalence object.
16665 An EQUIVALENCE object shall not be a dummy argument, a pointer, a target,
16666 an allocatable array, an object of nonsequence derived type, an object of
16667 sequence derived type containing a pointer at any level of component
16668 selection, an automatic object, a function name, an entry name, a result
16669 name, a named constant, a structure component, or a subobject of any of
16670 the preceding objects. A substring shall not have length zero. A
16671 derived type shall not have components with default initialization nor
16672 shall two objects of an equivalence group be initialized.
16673 Either all or none of the objects shall have an protected attribute.
16674 The simple constraints are done in symbol.c(check_conflict) and the rest
16675 are implemented here. */
16678 resolve_equivalence (gfc_equiv
*eq
)
16681 gfc_symbol
*first_sym
;
16684 locus
*last_where
= NULL
;
16685 seq_type eq_type
, last_eq_type
;
16686 gfc_typespec
*last_ts
;
16687 int object
, cnt_protected
;
16690 last_ts
= &eq
->expr
->symtree
->n
.sym
->ts
;
16692 first_sym
= eq
->expr
->symtree
->n
.sym
;
16696 for (object
= 1; eq
; eq
= eq
->eq
, object
++)
16700 e
->ts
= e
->symtree
->n
.sym
->ts
;
16701 /* match_varspec might not know yet if it is seeing
16702 array reference or substring reference, as it doesn't
16704 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
)
16706 gfc_ref
*ref
= e
->ref
;
16707 sym
= e
->symtree
->n
.sym
;
16709 if (sym
->attr
.dimension
)
16711 ref
->u
.ar
.as
= sym
->as
;
16715 /* For substrings, convert REF_ARRAY into REF_SUBSTRING. */
16716 if (e
->ts
.type
== BT_CHARACTER
16718 && ref
->type
== REF_ARRAY
16719 && ref
->u
.ar
.dimen
== 1
16720 && ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
16721 && ref
->u
.ar
.stride
[0] == NULL
)
16723 gfc_expr
*start
= ref
->u
.ar
.start
[0];
16724 gfc_expr
*end
= ref
->u
.ar
.end
[0];
16727 /* Optimize away the (:) reference. */
16728 if (start
== NULL
&& end
== NULL
)
16731 e
->ref
= ref
->next
;
16733 e
->ref
->next
= ref
->next
;
16738 ref
->type
= REF_SUBSTRING
;
16740 start
= gfc_get_int_expr (gfc_charlen_int_kind
,
16742 ref
->u
.ss
.start
= start
;
16743 if (end
== NULL
&& e
->ts
.u
.cl
)
16744 end
= gfc_copy_expr (e
->ts
.u
.cl
->length
);
16745 ref
->u
.ss
.end
= end
;
16746 ref
->u
.ss
.length
= e
->ts
.u
.cl
;
16753 /* Any further ref is an error. */
16756 gcc_assert (ref
->type
== REF_ARRAY
);
16757 gfc_error ("Syntax error in EQUIVALENCE statement at %L",
16763 if (!gfc_resolve_expr (e
))
16766 sym
= e
->symtree
->n
.sym
;
16768 if (sym
->attr
.is_protected
)
16770 if (cnt_protected
> 0 && cnt_protected
!= object
)
16772 gfc_error ("Either all or none of the objects in the "
16773 "EQUIVALENCE set at %L shall have the "
16774 "PROTECTED attribute",
16779 /* Shall not equivalence common block variables in a PURE procedure. */
16780 if (sym
->ns
->proc_name
16781 && sym
->ns
->proc_name
->attr
.pure
16782 && sym
->attr
.in_common
)
16784 /* Need to check for symbols that may have entered the pure
16785 procedure via a USE statement. */
16786 bool saw_sym
= false;
16787 if (sym
->ns
->use_stmts
)
16790 for (r
= sym
->ns
->use_stmts
->rename
; r
; r
= r
->next
)
16791 if (strcmp(r
->use_name
, sym
->name
) == 0) saw_sym
= true;
16797 gfc_error ("COMMON block member %qs at %L cannot be an "
16798 "EQUIVALENCE object in the pure procedure %qs",
16799 sym
->name
, &e
->where
, sym
->ns
->proc_name
->name
);
16803 /* Shall not be a named constant. */
16804 if (e
->expr_type
== EXPR_CONSTANT
)
16806 gfc_error ("Named constant %qs at %L cannot be an EQUIVALENCE "
16807 "object", sym
->name
, &e
->where
);
16811 if (e
->ts
.type
== BT_DERIVED
16812 && !resolve_equivalence_derived (e
->ts
.u
.derived
, sym
, e
))
16815 /* Check that the types correspond correctly:
16817 A numeric sequence structure may be equivalenced to another sequence
16818 structure, an object of default integer type, default real type, double
16819 precision real type, default logical type such that components of the
16820 structure ultimately only become associated to objects of the same
16821 kind. A character sequence structure may be equivalenced to an object
16822 of default character kind or another character sequence structure.
16823 Other objects may be equivalenced only to objects of the same type and
16824 kind parameters. */
16826 /* Identical types are unconditionally OK. */
16827 if (object
== 1 || gfc_compare_types (last_ts
, &sym
->ts
))
16828 goto identical_types
;
16830 last_eq_type
= sequence_type (*last_ts
);
16831 eq_type
= sequence_type (sym
->ts
);
16833 /* Since the pair of objects is not of the same type, mixed or
16834 non-default sequences can be rejected. */
16836 msg
= "Sequence %s with mixed components in EQUIVALENCE "
16837 "statement at %L with different type objects";
16839 && last_eq_type
== SEQ_MIXED
16840 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16841 || (eq_type
== SEQ_MIXED
16842 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16845 msg
= "Non-default type object or sequence %s in EQUIVALENCE "
16846 "statement at %L with objects of different type";
16848 && last_eq_type
== SEQ_NONDEFAULT
16849 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16850 || (eq_type
== SEQ_NONDEFAULT
16851 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16854 msg
="Non-CHARACTER object %qs in default CHARACTER "
16855 "EQUIVALENCE statement at %L";
16856 if (last_eq_type
== SEQ_CHARACTER
16857 && eq_type
!= SEQ_CHARACTER
16858 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16861 msg
="Non-NUMERIC object %qs in default NUMERIC "
16862 "EQUIVALENCE statement at %L";
16863 if (last_eq_type
== SEQ_NUMERIC
16864 && eq_type
!= SEQ_NUMERIC
16865 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16871 last_where
= &e
->where
;
16876 /* Shall not be an automatic array. */
16877 if (e
->ref
->type
== REF_ARRAY
&& is_non_constant_shape_array (sym
))
16879 gfc_error ("Array %qs at %L with non-constant bounds cannot be "
16880 "an EQUIVALENCE object", sym
->name
, &e
->where
);
16887 /* Shall not be a structure component. */
16888 if (r
->type
== REF_COMPONENT
)
16890 gfc_error ("Structure component %qs at %L cannot be an "
16891 "EQUIVALENCE object",
16892 r
->u
.c
.component
->name
, &e
->where
);
16896 /* A substring shall not have length zero. */
16897 if (r
->type
== REF_SUBSTRING
)
16899 if (compare_bound (r
->u
.ss
.start
, r
->u
.ss
.end
) == CMP_GT
)
16901 gfc_error ("Substring at %L has length zero",
16902 &r
->u
.ss
.start
->where
);
16912 /* Function called by resolve_fntype to flag other symbols used in the
16913 length type parameter specification of function results. */
16916 flag_fn_result_spec (gfc_expr
*expr
,
16918 int *f ATTRIBUTE_UNUSED
)
16923 if (expr
->expr_type
== EXPR_VARIABLE
)
16925 s
= expr
->symtree
->n
.sym
;
16926 for (ns
= s
->ns
; ns
; ns
= ns
->parent
)
16932 gfc_error ("Self reference in character length expression "
16933 "for %qs at %L", sym
->name
, &expr
->where
);
16937 if (!s
->fn_result_spec
16938 && s
->attr
.flavor
== FL_PARAMETER
)
16940 /* Function contained in a module.... */
16941 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_MODULE
)
16944 s
->fn_result_spec
= 1;
16945 /* Make sure that this symbol is translated as a module
16947 st
= gfc_get_unique_symtree (ns
);
16951 /* ... which is use associated and called. */
16952 else if (s
->attr
.use_assoc
|| s
->attr
.used_in_submodule
16954 /* External function matched with an interface. */
16957 && s
->ns
->proc_name
->attr
.if_source
== IFSRC_DECL
)
16958 || s
->ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16959 && s
->ns
->proc_name
->attr
.function
))
16960 s
->fn_result_spec
= 1;
16967 /* Resolve function and ENTRY types, issue diagnostics if needed. */
16970 resolve_fntype (gfc_namespace
*ns
)
16972 gfc_entry_list
*el
;
16975 if (ns
->proc_name
== NULL
|| !ns
->proc_name
->attr
.function
)
16978 /* If there are any entries, ns->proc_name is the entry master
16979 synthetic symbol and ns->entries->sym actual FUNCTION symbol. */
16981 sym
= ns
->entries
->sym
;
16983 sym
= ns
->proc_name
;
16984 if (sym
->result
== sym
16985 && sym
->ts
.type
== BT_UNKNOWN
16986 && !gfc_set_default_type (sym
, 0, NULL
)
16987 && !sym
->attr
.untyped
)
16989 gfc_error ("Function %qs at %L has no IMPLICIT type",
16990 sym
->name
, &sym
->declared_at
);
16991 sym
->attr
.untyped
= 1;
16994 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->ts
.u
.derived
->attr
.use_assoc
16995 && !sym
->attr
.contained
16996 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
16997 && gfc_check_symbol_access (sym
))
16999 gfc_notify_std (GFC_STD_F2003
, "PUBLIC function %qs at "
17000 "%L of PRIVATE type %qs", sym
->name
,
17001 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
17005 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
17007 if (el
->sym
->result
== el
->sym
17008 && el
->sym
->ts
.type
== BT_UNKNOWN
17009 && !gfc_set_default_type (el
->sym
, 0, NULL
)
17010 && !el
->sym
->attr
.untyped
)
17012 gfc_error ("ENTRY %qs at %L has no IMPLICIT type",
17013 el
->sym
->name
, &el
->sym
->declared_at
);
17014 el
->sym
->attr
.untyped
= 1;
17018 if (sym
->ts
.type
== BT_CHARACTER
)
17019 gfc_traverse_expr (sym
->ts
.u
.cl
->length
, sym
, flag_fn_result_spec
, 0);
17023 /* 12.3.2.1.1 Defined operators. */
17026 check_uop_procedure (gfc_symbol
*sym
, locus where
)
17028 gfc_formal_arglist
*formal
;
17030 if (!sym
->attr
.function
)
17032 gfc_error ("User operator procedure %qs at %L must be a FUNCTION",
17033 sym
->name
, &where
);
17037 if (sym
->ts
.type
== BT_CHARACTER
17038 && !((sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
) || sym
->ts
.deferred
)
17039 && !(sym
->result
&& ((sym
->result
->ts
.u
.cl
17040 && sym
->result
->ts
.u
.cl
->length
) || sym
->result
->ts
.deferred
)))
17042 gfc_error ("User operator procedure %qs at %L cannot be assumed "
17043 "character length", sym
->name
, &where
);
17047 formal
= gfc_sym_get_dummy_args (sym
);
17048 if (!formal
|| !formal
->sym
)
17050 gfc_error ("User operator procedure %qs at %L must have at least "
17051 "one argument", sym
->name
, &where
);
17055 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
17057 gfc_error ("First argument of operator interface at %L must be "
17058 "INTENT(IN)", &where
);
17062 if (formal
->sym
->attr
.optional
)
17064 gfc_error ("First argument of operator interface at %L cannot be "
17065 "optional", &where
);
17069 formal
= formal
->next
;
17070 if (!formal
|| !formal
->sym
)
17073 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
17075 gfc_error ("Second argument of operator interface at %L must be "
17076 "INTENT(IN)", &where
);
17080 if (formal
->sym
->attr
.optional
)
17082 gfc_error ("Second argument of operator interface at %L cannot be "
17083 "optional", &where
);
17089 gfc_error ("Operator interface at %L must have, at most, two "
17090 "arguments", &where
);
17098 gfc_resolve_uops (gfc_symtree
*symtree
)
17100 gfc_interface
*itr
;
17102 if (symtree
== NULL
)
17105 gfc_resolve_uops (symtree
->left
);
17106 gfc_resolve_uops (symtree
->right
);
17108 for (itr
= symtree
->n
.uop
->op
; itr
; itr
= itr
->next
)
17109 check_uop_procedure (itr
->sym
, itr
->sym
->declared_at
);
17113 /* Examine all of the expressions associated with a program unit,
17114 assign types to all intermediate expressions, make sure that all
17115 assignments are to compatible types and figure out which names
17116 refer to which functions or subroutines. It doesn't check code
17117 block, which is handled by gfc_resolve_code. */
17120 resolve_types (gfc_namespace
*ns
)
17126 gfc_namespace
* old_ns
= gfc_current_ns
;
17127 bool recursive
= ns
->proc_name
&& ns
->proc_name
->attr
.recursive
;
17129 if (ns
->types_resolved
)
17132 /* Check that all IMPLICIT types are ok. */
17133 if (!ns
->seen_implicit_none
)
17136 for (letter
= 0; letter
!= GFC_LETTERS
; ++letter
)
17137 if (ns
->set_flag
[letter
]
17138 && !resolve_typespec_used (&ns
->default_type
[letter
],
17139 &ns
->implicit_loc
[letter
], NULL
))
17143 gfc_current_ns
= ns
;
17145 resolve_entries (ns
);
17147 resolve_common_vars (&ns
->blank_common
, false);
17148 resolve_common_blocks (ns
->common_root
);
17150 resolve_contained_functions (ns
);
17152 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
17153 && ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
17154 gfc_resolve_formal_arglist (ns
->proc_name
);
17156 gfc_traverse_ns (ns
, resolve_bind_c_derived_types
);
17158 for (cl
= ns
->cl_list
; cl
; cl
= cl
->next
)
17159 resolve_charlen (cl
);
17161 gfc_traverse_ns (ns
, resolve_symbol
);
17163 resolve_fntype (ns
);
17165 for (n
= ns
->contained
; n
; n
= n
->sibling
)
17167 if (gfc_pure (ns
->proc_name
) && !gfc_pure (n
->proc_name
))
17168 gfc_error ("Contained procedure %qs at %L of a PURE procedure must "
17169 "also be PURE", n
->proc_name
->name
,
17170 &n
->proc_name
->declared_at
);
17176 gfc_do_concurrent_flag
= 0;
17177 gfc_check_interfaces (ns
);
17179 gfc_traverse_ns (ns
, resolve_values
);
17181 if (ns
->save_all
|| (!flag_automatic
&& !recursive
))
17185 for (d
= ns
->data
; d
; d
= d
->next
)
17189 gfc_traverse_ns (ns
, gfc_formalize_init_value
);
17191 gfc_traverse_ns (ns
, gfc_verify_binding_labels
);
17193 for (eq
= ns
->equiv
; eq
; eq
= eq
->next
)
17194 resolve_equivalence (eq
);
17196 /* Warn about unused labels. */
17197 if (warn_unused_label
)
17198 warn_unused_fortran_label (ns
->st_labels
);
17200 gfc_resolve_uops (ns
->uop_root
);
17202 gfc_traverse_ns (ns
, gfc_verify_DTIO_procedures
);
17204 gfc_resolve_omp_declare_simd (ns
);
17206 gfc_resolve_omp_udrs (ns
->omp_udr_root
);
17208 ns
->types_resolved
= 1;
17210 gfc_current_ns
= old_ns
;
17214 /* Call gfc_resolve_code recursively. */
17217 resolve_codes (gfc_namespace
*ns
)
17220 bitmap_obstack old_obstack
;
17222 if (ns
->resolved
== 1)
17225 for (n
= ns
->contained
; n
; n
= n
->sibling
)
17228 gfc_current_ns
= ns
;
17230 /* Don't clear 'cs_base' if this is the namespace of a BLOCK construct. */
17231 if (!(ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_LABEL
))
17234 /* Set to an out of range value. */
17235 current_entry_id
= -1;
17237 old_obstack
= labels_obstack
;
17238 bitmap_obstack_initialize (&labels_obstack
);
17240 gfc_resolve_oacc_declare (ns
);
17241 gfc_resolve_oacc_routines (ns
);
17242 gfc_resolve_omp_local_vars (ns
);
17243 gfc_resolve_code (ns
->code
, ns
);
17245 bitmap_obstack_release (&labels_obstack
);
17246 labels_obstack
= old_obstack
;
17250 /* This function is called after a complete program unit has been compiled.
17251 Its purpose is to examine all of the expressions associated with a program
17252 unit, assign types to all intermediate expressions, make sure that all
17253 assignments are to compatible types and figure out which names refer to
17254 which functions or subroutines. */
17257 gfc_resolve (gfc_namespace
*ns
)
17259 gfc_namespace
*old_ns
;
17260 code_stack
*old_cs_base
;
17261 struct gfc_omp_saved_state old_omp_state
;
17267 old_ns
= gfc_current_ns
;
17268 old_cs_base
= cs_base
;
17270 /* As gfc_resolve can be called during resolution of an OpenMP construct
17271 body, we should clear any state associated to it, so that say NS's
17272 DO loops are not interpreted as OpenMP loops. */
17273 if (!ns
->construct_entities
)
17274 gfc_omp_save_and_clear_state (&old_omp_state
);
17276 resolve_types (ns
);
17277 component_assignment_level
= 0;
17278 resolve_codes (ns
);
17280 gfc_current_ns
= old_ns
;
17281 cs_base
= old_cs_base
;
17284 gfc_run_passes (ns
);
17286 if (!ns
->construct_entities
)
17287 gfc_omp_restore_state (&old_omp_state
);