1 /* Perform type resolution on the various structures.
2 Copyright (C) 2001-2018 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 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 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 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
)
586 /* Try to find out of what the return type is. */
587 if (sym
->result
->ts
.type
== BT_UNKNOWN
&& sym
->result
->ts
.interface
== NULL
)
589 t
= gfc_set_default_type (sym
->result
, 0, ns
);
591 if (!t
&& !sym
->result
->attr
.untyped
)
593 if (sym
->result
== sym
)
594 gfc_error ("Contained function %qs at %L has no IMPLICIT type",
595 sym
->name
, &sym
->declared_at
);
596 else if (!sym
->result
->attr
.proc_pointer
)
597 gfc_error ("Result %qs of contained function %qs at %L has "
598 "no IMPLICIT type", sym
->result
->name
, sym
->name
,
599 &sym
->result
->declared_at
);
600 sym
->result
->attr
.untyped
= 1;
604 /* Fortran 95 Draft Standard, page 51, Section 5.1.1.5, on the Character
605 type, lists the only ways a character length value of * can be used:
606 dummy arguments of procedures, named constants, and function results
607 in external functions. Internal function results and results of module
608 procedures are not on this list, ergo, not permitted. */
610 if (sym
->result
->ts
.type
== BT_CHARACTER
)
612 gfc_charlen
*cl
= sym
->result
->ts
.u
.cl
;
613 if ((!cl
|| !cl
->length
) && !sym
->result
->ts
.deferred
)
615 /* See if this is a module-procedure and adapt error message
618 gcc_assert (ns
->parent
&& ns
->parent
->proc_name
);
619 module_proc
= (ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
);
621 gfc_error (module_proc
622 ? G_("Character-valued module procedure %qs at %L"
623 " must not be assumed length")
624 : G_("Character-valued internal function %qs at %L"
625 " must not be assumed length"),
626 sym
->name
, &sym
->declared_at
);
632 /* Add NEW_ARGS to the formal argument list of PROC, taking care not to
633 introduce duplicates. */
636 merge_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
638 gfc_formal_arglist
*f
, *new_arglist
;
641 for (; new_args
!= NULL
; new_args
= new_args
->next
)
643 new_sym
= new_args
->sym
;
644 /* See if this arg is already in the formal argument list. */
645 for (f
= proc
->formal
; f
; f
= f
->next
)
647 if (new_sym
== f
->sym
)
654 /* Add a new argument. Argument order is not important. */
655 new_arglist
= gfc_get_formal_arglist ();
656 new_arglist
->sym
= new_sym
;
657 new_arglist
->next
= proc
->formal
;
658 proc
->formal
= new_arglist
;
663 /* Flag the arguments that are not present in all entries. */
666 check_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
668 gfc_formal_arglist
*f
, *head
;
671 for (f
= proc
->formal
; f
; f
= f
->next
)
676 for (new_args
= head
; new_args
; new_args
= new_args
->next
)
678 if (new_args
->sym
== f
->sym
)
685 f
->sym
->attr
.not_always_present
= 1;
690 /* Resolve alternate entry points. If a symbol has multiple entry points we
691 create a new master symbol for the main routine, and turn the existing
692 symbol into an entry point. */
695 resolve_entries (gfc_namespace
*ns
)
697 gfc_namespace
*old_ns
;
701 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
702 static int master_count
= 0;
704 if (ns
->proc_name
== NULL
)
707 /* No need to do anything if this procedure doesn't have alternate entry
712 /* We may already have resolved alternate entry points. */
713 if (ns
->proc_name
->attr
.entry_master
)
716 /* If this isn't a procedure something has gone horribly wrong. */
717 gcc_assert (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
);
719 /* Remember the current namespace. */
720 old_ns
= gfc_current_ns
;
724 /* Add the main entry point to the list of entry points. */
725 el
= gfc_get_entry_list ();
726 el
->sym
= ns
->proc_name
;
728 el
->next
= ns
->entries
;
730 ns
->proc_name
->attr
.entry
= 1;
732 /* If it is a module function, it needs to be in the right namespace
733 so that gfc_get_fake_result_decl can gather up the results. The
734 need for this arose in get_proc_name, where these beasts were
735 left in their own namespace, to keep prior references linked to
736 the entry declaration.*/
737 if (ns
->proc_name
->attr
.function
738 && ns
->parent
&& ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
741 /* Do the same for entries where the master is not a module
742 procedure. These are retained in the module namespace because
743 of the module procedure declaration. */
744 for (el
= el
->next
; el
; el
= el
->next
)
745 if (el
->sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
746 && el
->sym
->attr
.mod_proc
)
750 /* Add an entry statement for it. */
751 c
= gfc_get_code (EXEC_ENTRY
);
756 /* Create a new symbol for the master function. */
757 /* Give the internal function a unique name (within this file).
758 Also include the function name so the user has some hope of figuring
759 out what is going on. */
760 snprintf (name
, GFC_MAX_SYMBOL_LEN
, "master.%d.%s",
761 master_count
++, ns
->proc_name
->name
);
762 gfc_get_ha_symbol (name
, &proc
);
763 gcc_assert (proc
!= NULL
);
765 gfc_add_procedure (&proc
->attr
, PROC_INTERNAL
, proc
->name
, NULL
);
766 if (ns
->proc_name
->attr
.subroutine
)
767 gfc_add_subroutine (&proc
->attr
, proc
->name
, NULL
);
771 gfc_typespec
*ts
, *fts
;
772 gfc_array_spec
*as
, *fas
;
773 gfc_add_function (&proc
->attr
, proc
->name
, NULL
);
775 fas
= ns
->entries
->sym
->as
;
776 fas
= fas
? fas
: ns
->entries
->sym
->result
->as
;
777 fts
= &ns
->entries
->sym
->result
->ts
;
778 if (fts
->type
== BT_UNKNOWN
)
779 fts
= gfc_get_default_type (ns
->entries
->sym
->result
->name
, NULL
);
780 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
782 ts
= &el
->sym
->result
->ts
;
784 as
= as
? as
: el
->sym
->result
->as
;
785 if (ts
->type
== BT_UNKNOWN
)
786 ts
= gfc_get_default_type (el
->sym
->result
->name
, NULL
);
788 if (! gfc_compare_types (ts
, fts
)
789 || (el
->sym
->result
->attr
.dimension
790 != ns
->entries
->sym
->result
->attr
.dimension
)
791 || (el
->sym
->result
->attr
.pointer
792 != ns
->entries
->sym
->result
->attr
.pointer
))
794 else if (as
&& fas
&& ns
->entries
->sym
->result
!= el
->sym
->result
795 && gfc_compare_array_spec (as
, fas
) == 0)
796 gfc_error ("Function %s at %L has entries with mismatched "
797 "array specifications", ns
->entries
->sym
->name
,
798 &ns
->entries
->sym
->declared_at
);
799 /* The characteristics need to match and thus both need to have
800 the same string length, i.e. both len=*, or both len=4.
801 Having both len=<variable> is also possible, but difficult to
802 check at compile time. */
803 else if (ts
->type
== BT_CHARACTER
&& ts
->u
.cl
&& fts
->u
.cl
804 && (((ts
->u
.cl
->length
&& !fts
->u
.cl
->length
)
805 ||(!ts
->u
.cl
->length
&& fts
->u
.cl
->length
))
807 && ts
->u
.cl
->length
->expr_type
808 != fts
->u
.cl
->length
->expr_type
)
810 && ts
->u
.cl
->length
->expr_type
== EXPR_CONSTANT
811 && mpz_cmp (ts
->u
.cl
->length
->value
.integer
,
812 fts
->u
.cl
->length
->value
.integer
) != 0)))
813 gfc_notify_std (GFC_STD_GNU
, "Function %s at %L with "
814 "entries returning variables of different "
815 "string lengths", ns
->entries
->sym
->name
,
816 &ns
->entries
->sym
->declared_at
);
821 sym
= ns
->entries
->sym
->result
;
822 /* All result types the same. */
824 if (sym
->attr
.dimension
)
825 gfc_set_array_spec (proc
, gfc_copy_array_spec (sym
->as
), NULL
);
826 if (sym
->attr
.pointer
)
827 gfc_add_pointer (&proc
->attr
, NULL
);
831 /* Otherwise the result will be passed through a union by
833 proc
->attr
.mixed_entry_master
= 1;
834 for (el
= ns
->entries
; el
; el
= el
->next
)
836 sym
= el
->sym
->result
;
837 if (sym
->attr
.dimension
)
839 if (el
== ns
->entries
)
840 gfc_error ("FUNCTION result %s can't be an array in "
841 "FUNCTION %s at %L", sym
->name
,
842 ns
->entries
->sym
->name
, &sym
->declared_at
);
844 gfc_error ("ENTRY result %s can't be an array in "
845 "FUNCTION %s at %L", sym
->name
,
846 ns
->entries
->sym
->name
, &sym
->declared_at
);
848 else if (sym
->attr
.pointer
)
850 if (el
== ns
->entries
)
851 gfc_error ("FUNCTION result %s can't be a POINTER in "
852 "FUNCTION %s at %L", sym
->name
,
853 ns
->entries
->sym
->name
, &sym
->declared_at
);
855 gfc_error ("ENTRY result %s can't be a POINTER in "
856 "FUNCTION %s at %L", sym
->name
,
857 ns
->entries
->sym
->name
, &sym
->declared_at
);
862 if (ts
->type
== BT_UNKNOWN
)
863 ts
= gfc_get_default_type (sym
->name
, NULL
);
867 if (ts
->kind
== gfc_default_integer_kind
)
871 if (ts
->kind
== gfc_default_real_kind
872 || ts
->kind
== gfc_default_double_kind
)
876 if (ts
->kind
== gfc_default_complex_kind
)
880 if (ts
->kind
== gfc_default_logical_kind
)
884 /* We will issue error elsewhere. */
892 if (el
== ns
->entries
)
893 gfc_error ("FUNCTION result %s can't be of type %s "
894 "in FUNCTION %s at %L", sym
->name
,
895 gfc_typename (ts
), ns
->entries
->sym
->name
,
898 gfc_error ("ENTRY result %s can't be of type %s "
899 "in FUNCTION %s at %L", sym
->name
,
900 gfc_typename (ts
), ns
->entries
->sym
->name
,
907 proc
->attr
.access
= ACCESS_PRIVATE
;
908 proc
->attr
.entry_master
= 1;
910 /* Merge all the entry point arguments. */
911 for (el
= ns
->entries
; el
; el
= el
->next
)
912 merge_argument_lists (proc
, el
->sym
->formal
);
914 /* Check the master formal arguments for any that are not
915 present in all entry points. */
916 for (el
= ns
->entries
; el
; el
= el
->next
)
917 check_argument_lists (proc
, el
->sym
->formal
);
919 /* Use the master function for the function body. */
920 ns
->proc_name
= proc
;
922 /* Finalize the new symbols. */
923 gfc_commit_symbols ();
925 /* Restore the original namespace. */
926 gfc_current_ns
= old_ns
;
930 /* Resolve common variables. */
932 resolve_common_vars (gfc_common_head
*common_block
, bool named_common
)
934 gfc_symbol
*csym
= common_block
->head
;
936 for (; csym
; csym
= csym
->common_next
)
938 /* gfc_add_in_common may have been called before, but the reported errors
939 have been ignored to continue parsing.
940 We do the checks again here. */
941 if (!csym
->attr
.use_assoc
)
942 gfc_add_in_common (&csym
->attr
, csym
->name
, &common_block
->where
);
944 if (csym
->value
|| csym
->attr
.data
)
946 if (!csym
->ns
->is_block_data
)
947 gfc_notify_std (GFC_STD_GNU
, "Variable %qs at %L is in COMMON "
948 "but only in BLOCK DATA initialization is "
949 "allowed", csym
->name
, &csym
->declared_at
);
950 else if (!named_common
)
951 gfc_notify_std (GFC_STD_GNU
, "Initialized variable %qs at %L is "
952 "in a blank COMMON but initialization is only "
953 "allowed in named common blocks", csym
->name
,
957 if (UNLIMITED_POLY (csym
))
958 gfc_error_now ("%qs in cannot appear in COMMON at %L "
959 "[F2008:C5100]", csym
->name
, &csym
->declared_at
);
961 if (csym
->ts
.type
!= BT_DERIVED
)
964 if (!(csym
->ts
.u
.derived
->attr
.sequence
965 || csym
->ts
.u
.derived
->attr
.is_bind_c
))
966 gfc_error_now ("Derived type variable %qs in COMMON at %L "
967 "has neither the SEQUENCE nor the BIND(C) "
968 "attribute", csym
->name
, &csym
->declared_at
);
969 if (csym
->ts
.u
.derived
->attr
.alloc_comp
)
970 gfc_error_now ("Derived type variable %qs in COMMON at %L "
971 "has an ultimate component that is "
972 "allocatable", csym
->name
, &csym
->declared_at
);
973 if (gfc_has_default_initializer (csym
->ts
.u
.derived
))
974 gfc_error_now ("Derived type variable %qs in COMMON at %L "
975 "may not have default initializer", csym
->name
,
978 if (csym
->attr
.flavor
== FL_UNKNOWN
&& !csym
->attr
.proc_pointer
)
979 gfc_add_flavor (&csym
->attr
, FL_VARIABLE
, csym
->name
, &csym
->declared_at
);
983 /* Resolve common blocks. */
985 resolve_common_blocks (gfc_symtree
*common_root
)
990 if (common_root
== NULL
)
993 if (common_root
->left
)
994 resolve_common_blocks (common_root
->left
);
995 if (common_root
->right
)
996 resolve_common_blocks (common_root
->right
);
998 resolve_common_vars (common_root
->n
.common
, true);
1000 /* The common name is a global name - in Fortran 2003 also if it has a
1001 C binding name, since Fortran 2008 only the C binding name is a global
1003 if (!common_root
->n
.common
->binding_label
1004 || gfc_notification_std (GFC_STD_F2008
))
1006 gsym
= gfc_find_gsymbol (gfc_gsym_root
,
1007 common_root
->n
.common
->name
);
1009 if (gsym
&& gfc_notification_std (GFC_STD_F2008
)
1010 && gsym
->type
== GSYM_COMMON
1011 && ((common_root
->n
.common
->binding_label
1012 && (!gsym
->binding_label
1013 || strcmp (common_root
->n
.common
->binding_label
,
1014 gsym
->binding_label
) != 0))
1015 || (!common_root
->n
.common
->binding_label
1016 && gsym
->binding_label
)))
1018 gfc_error ("In Fortran 2003 COMMON %qs block at %L is a global "
1019 "identifier and must thus have the same binding name "
1020 "as the same-named COMMON block at %L: %s vs %s",
1021 common_root
->n
.common
->name
, &common_root
->n
.common
->where
,
1023 common_root
->n
.common
->binding_label
1024 ? common_root
->n
.common
->binding_label
: "(blank)",
1025 gsym
->binding_label
? gsym
->binding_label
: "(blank)");
1029 if (gsym
&& gsym
->type
!= GSYM_COMMON
1030 && !common_root
->n
.common
->binding_label
)
1032 gfc_error ("COMMON block %qs at %L uses the same global identifier "
1034 common_root
->n
.common
->name
, &common_root
->n
.common
->where
,
1038 if (gsym
&& gsym
->type
!= GSYM_COMMON
)
1040 gfc_error ("Fortran 2008: COMMON block %qs with binding label at "
1041 "%L sharing the identifier with global non-COMMON-block "
1042 "entity at %L", common_root
->n
.common
->name
,
1043 &common_root
->n
.common
->where
, &gsym
->where
);
1048 gsym
= gfc_get_gsymbol (common_root
->n
.common
->name
);
1049 gsym
->type
= GSYM_COMMON
;
1050 gsym
->where
= common_root
->n
.common
->where
;
1056 if (common_root
->n
.common
->binding_label
)
1058 gsym
= gfc_find_gsymbol (gfc_gsym_root
,
1059 common_root
->n
.common
->binding_label
);
1060 if (gsym
&& gsym
->type
!= GSYM_COMMON
)
1062 gfc_error ("COMMON block at %L with binding label %qs uses the same "
1063 "global identifier as entity at %L",
1064 &common_root
->n
.common
->where
,
1065 common_root
->n
.common
->binding_label
, &gsym
->where
);
1070 gsym
= gfc_get_gsymbol (common_root
->n
.common
->binding_label
);
1071 gsym
->type
= GSYM_COMMON
;
1072 gsym
->where
= common_root
->n
.common
->where
;
1078 gfc_find_symbol (common_root
->name
, gfc_current_ns
, 0, &sym
);
1082 if (sym
->attr
.flavor
== FL_PARAMETER
)
1083 gfc_error ("COMMON block %qs at %L is used as PARAMETER at %L",
1084 sym
->name
, &common_root
->n
.common
->where
, &sym
->declared_at
);
1086 if (sym
->attr
.external
)
1087 gfc_error ("COMMON block %qs at %L can not have the EXTERNAL attribute",
1088 sym
->name
, &common_root
->n
.common
->where
);
1090 if (sym
->attr
.intrinsic
)
1091 gfc_error ("COMMON block %qs at %L is also an intrinsic procedure",
1092 sym
->name
, &common_root
->n
.common
->where
);
1093 else if (sym
->attr
.result
1094 || gfc_is_function_return_value (sym
, gfc_current_ns
))
1095 gfc_notify_std (GFC_STD_F2003
, "COMMON block %qs at %L "
1096 "that is also a function result", sym
->name
,
1097 &common_root
->n
.common
->where
);
1098 else if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.proc
!= PROC_INTERNAL
1099 && sym
->attr
.proc
!= PROC_ST_FUNCTION
)
1100 gfc_notify_std (GFC_STD_F2003
, "COMMON block %qs at %L "
1101 "that is also a global procedure", sym
->name
,
1102 &common_root
->n
.common
->where
);
1106 /* Resolve contained function types. Because contained functions can call one
1107 another, they have to be worked out before any of the contained procedures
1110 The good news is that if a function doesn't already have a type, the only
1111 way it can get one is through an IMPLICIT type or a RESULT variable, because
1112 by definition contained functions are contained namespace they're contained
1113 in, not in a sibling or parent namespace. */
1116 resolve_contained_functions (gfc_namespace
*ns
)
1118 gfc_namespace
*child
;
1121 resolve_formal_arglists (ns
);
1123 for (child
= ns
->contained
; child
; child
= child
->sibling
)
1125 /* Resolve alternate entry points first. */
1126 resolve_entries (child
);
1128 /* Then check function return types. */
1129 resolve_contained_fntype (child
->proc_name
, child
);
1130 for (el
= child
->entries
; el
; el
= el
->next
)
1131 resolve_contained_fntype (el
->sym
, child
);
1137 /* A Parameterized Derived Type constructor must contain values for
1138 the PDT KIND parameters or they must have a default initializer.
1139 Go through the constructor picking out the KIND expressions,
1140 storing them in 'param_list' and then call gfc_get_pdt_instance
1141 to obtain the PDT instance. */
1143 static gfc_actual_arglist
*param_list
, *param_tail
, *param
;
1146 get_pdt_spec_expr (gfc_component
*c
, gfc_expr
*expr
)
1148 param
= gfc_get_actual_arglist ();
1150 param_list
= param_tail
= param
;
1153 param_tail
->next
= param
;
1154 param_tail
= param_tail
->next
;
1157 param_tail
->name
= c
->name
;
1159 param_tail
->expr
= gfc_copy_expr (expr
);
1160 else if (c
->initializer
)
1161 param_tail
->expr
= gfc_copy_expr (c
->initializer
);
1164 param_tail
->spec_type
= SPEC_ASSUMED
;
1165 if (c
->attr
.pdt_kind
)
1167 gfc_error ("The KIND parameter %qs in the PDT constructor "
1168 "at %C has no value", param
->name
);
1177 get_pdt_constructor (gfc_expr
*expr
, gfc_constructor
**constr
,
1178 gfc_symbol
*derived
)
1180 gfc_constructor
*cons
= NULL
;
1181 gfc_component
*comp
;
1184 if (expr
&& expr
->expr_type
== EXPR_STRUCTURE
)
1185 cons
= gfc_constructor_first (expr
->value
.constructor
);
1190 comp
= derived
->components
;
1192 for (; comp
&& cons
; comp
= comp
->next
, cons
= gfc_constructor_next (cons
))
1195 && cons
->expr
->expr_type
== EXPR_STRUCTURE
1196 && comp
->ts
.type
== BT_DERIVED
)
1198 t
= get_pdt_constructor (cons
->expr
, NULL
, comp
->ts
.u
.derived
);
1202 else if (comp
->ts
.type
== BT_DERIVED
)
1204 t
= get_pdt_constructor (NULL
, &cons
, comp
->ts
.u
.derived
);
1208 else if ((comp
->attr
.pdt_kind
|| comp
->attr
.pdt_len
)
1209 && derived
->attr
.pdt_template
)
1211 t
= get_pdt_spec_expr (comp
, cons
->expr
);
1220 static bool resolve_fl_derived0 (gfc_symbol
*sym
);
1221 static bool resolve_fl_struct (gfc_symbol
*sym
);
1224 /* Resolve all of the elements of a structure constructor and make sure that
1225 the types are correct. The 'init' flag indicates that the given
1226 constructor is an initializer. */
1229 resolve_structure_cons (gfc_expr
*expr
, int init
)
1231 gfc_constructor
*cons
;
1232 gfc_component
*comp
;
1238 if (expr
->ts
.type
== BT_DERIVED
|| expr
->ts
.type
== BT_UNION
)
1240 if (expr
->ts
.u
.derived
->attr
.flavor
== FL_DERIVED
)
1241 resolve_fl_derived0 (expr
->ts
.u
.derived
);
1243 resolve_fl_struct (expr
->ts
.u
.derived
);
1245 /* If this is a Parameterized Derived Type template, find the
1246 instance corresponding to the PDT kind parameters. */
1247 if (expr
->ts
.u
.derived
->attr
.pdt_template
)
1250 t
= get_pdt_constructor (expr
, NULL
, expr
->ts
.u
.derived
);
1253 gfc_get_pdt_instance (param_list
, &expr
->ts
.u
.derived
, NULL
);
1255 expr
->param_list
= gfc_copy_actual_arglist (param_list
);
1258 gfc_free_actual_arglist (param_list
);
1260 if (!expr
->ts
.u
.derived
->attr
.pdt_type
)
1265 cons
= gfc_constructor_first (expr
->value
.constructor
);
1267 /* A constructor may have references if it is the result of substituting a
1268 parameter variable. In this case we just pull out the component we
1271 comp
= expr
->ref
->u
.c
.sym
->components
;
1273 comp
= expr
->ts
.u
.derived
->components
;
1275 for (; comp
&& cons
; comp
= comp
->next
, cons
= gfc_constructor_next (cons
))
1282 /* Unions use an EXPR_NULL contrived expression to tell the translation
1283 phase to generate an initializer of the appropriate length.
1285 if (cons
->expr
->ts
.type
== BT_UNION
&& cons
->expr
->expr_type
== EXPR_NULL
)
1288 if (!gfc_resolve_expr (cons
->expr
))
1294 rank
= comp
->as
? comp
->as
->rank
: 0;
1295 if (comp
->ts
.type
== BT_CLASS
1296 && !comp
->ts
.u
.derived
->attr
.unlimited_polymorphic
1297 && CLASS_DATA (comp
)->as
)
1298 rank
= CLASS_DATA (comp
)->as
->rank
;
1300 if (cons
->expr
->expr_type
!= EXPR_NULL
&& rank
!= cons
->expr
->rank
1301 && (comp
->attr
.allocatable
|| cons
->expr
->rank
))
1303 gfc_error ("The rank of the element in the structure "
1304 "constructor at %L does not match that of the "
1305 "component (%d/%d)", &cons
->expr
->where
,
1306 cons
->expr
->rank
, rank
);
1310 /* If we don't have the right type, try to convert it. */
1312 if (!comp
->attr
.proc_pointer
&&
1313 !gfc_compare_types (&cons
->expr
->ts
, &comp
->ts
))
1315 if (strcmp (comp
->name
, "_extends") == 0)
1317 /* Can afford to be brutal with the _extends initializer.
1318 The derived type can get lost because it is PRIVATE
1319 but it is not usage constrained by the standard. */
1320 cons
->expr
->ts
= comp
->ts
;
1322 else if (comp
->attr
.pointer
&& cons
->expr
->ts
.type
!= BT_UNKNOWN
)
1324 gfc_error ("The element in the structure constructor at %L, "
1325 "for pointer component %qs, is %s but should be %s",
1326 &cons
->expr
->where
, comp
->name
,
1327 gfc_basic_typename (cons
->expr
->ts
.type
),
1328 gfc_basic_typename (comp
->ts
.type
));
1333 bool t2
= gfc_convert_type (cons
->expr
, &comp
->ts
, 1);
1339 /* For strings, the length of the constructor should be the same as
1340 the one of the structure, ensure this if the lengths are known at
1341 compile time and when we are dealing with PARAMETER or structure
1343 if (cons
->expr
->ts
.type
== BT_CHARACTER
&& comp
->ts
.u
.cl
1344 && comp
->ts
.u
.cl
->length
1345 && comp
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
1346 && cons
->expr
->ts
.u
.cl
&& cons
->expr
->ts
.u
.cl
->length
1347 && cons
->expr
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
1348 && cons
->expr
->rank
!= 0
1349 && mpz_cmp (cons
->expr
->ts
.u
.cl
->length
->value
.integer
,
1350 comp
->ts
.u
.cl
->length
->value
.integer
) != 0)
1352 if (cons
->expr
->expr_type
== EXPR_VARIABLE
1353 && cons
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
)
1355 /* Wrap the parameter in an array constructor (EXPR_ARRAY)
1356 to make use of the gfc_resolve_character_array_constructor
1357 machinery. The expression is later simplified away to
1358 an array of string literals. */
1359 gfc_expr
*para
= cons
->expr
;
1360 cons
->expr
= gfc_get_expr ();
1361 cons
->expr
->ts
= para
->ts
;
1362 cons
->expr
->where
= para
->where
;
1363 cons
->expr
->expr_type
= EXPR_ARRAY
;
1364 cons
->expr
->rank
= para
->rank
;
1365 cons
->expr
->shape
= gfc_copy_shape (para
->shape
, para
->rank
);
1366 gfc_constructor_append_expr (&cons
->expr
->value
.constructor
,
1367 para
, &cons
->expr
->where
);
1370 if (cons
->expr
->expr_type
== EXPR_ARRAY
)
1372 /* Rely on the cleanup of the namespace to deal correctly with
1373 the old charlen. (There was a block here that attempted to
1374 remove the charlen but broke the chain in so doing.) */
1375 cons
->expr
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1376 cons
->expr
->ts
.u
.cl
->length_from_typespec
= true;
1377 cons
->expr
->ts
.u
.cl
->length
= gfc_copy_expr (comp
->ts
.u
.cl
->length
);
1378 gfc_resolve_character_array_constructor (cons
->expr
);
1382 if (cons
->expr
->expr_type
== EXPR_NULL
1383 && !(comp
->attr
.pointer
|| comp
->attr
.allocatable
1384 || comp
->attr
.proc_pointer
|| comp
->ts
.f90_type
== BT_VOID
1385 || (comp
->ts
.type
== BT_CLASS
1386 && (CLASS_DATA (comp
)->attr
.class_pointer
1387 || CLASS_DATA (comp
)->attr
.allocatable
))))
1390 gfc_error ("The NULL in the structure constructor at %L is "
1391 "being applied to component %qs, which is neither "
1392 "a POINTER nor ALLOCATABLE", &cons
->expr
->where
,
1396 if (comp
->attr
.proc_pointer
&& comp
->ts
.interface
)
1398 /* Check procedure pointer interface. */
1399 gfc_symbol
*s2
= NULL
;
1404 c2
= gfc_get_proc_ptr_comp (cons
->expr
);
1407 s2
= c2
->ts
.interface
;
1410 else if (cons
->expr
->expr_type
== EXPR_FUNCTION
)
1412 s2
= cons
->expr
->symtree
->n
.sym
->result
;
1413 name
= cons
->expr
->symtree
->n
.sym
->result
->name
;
1415 else if (cons
->expr
->expr_type
!= EXPR_NULL
)
1417 s2
= cons
->expr
->symtree
->n
.sym
;
1418 name
= cons
->expr
->symtree
->n
.sym
->name
;
1421 if (s2
&& !gfc_compare_interfaces (comp
->ts
.interface
, s2
, name
, 0, 1,
1422 err
, sizeof (err
), NULL
, NULL
))
1424 gfc_error_opt (OPT_Wargument_mismatch
,
1425 "Interface mismatch for procedure-pointer "
1426 "component %qs in structure constructor at %L:"
1427 " %s", comp
->name
, &cons
->expr
->where
, err
);
1432 if (!comp
->attr
.pointer
|| comp
->attr
.proc_pointer
1433 || cons
->expr
->expr_type
== EXPR_NULL
)
1436 a
= gfc_expr_attr (cons
->expr
);
1438 if (!a
.pointer
&& !a
.target
)
1441 gfc_error ("The element in the structure constructor at %L, "
1442 "for pointer component %qs should be a POINTER or "
1443 "a TARGET", &cons
->expr
->where
, comp
->name
);
1448 /* F08:C461. Additional checks for pointer initialization. */
1452 gfc_error ("Pointer initialization target at %L "
1453 "must not be ALLOCATABLE", &cons
->expr
->where
);
1458 gfc_error ("Pointer initialization target at %L "
1459 "must have the SAVE attribute", &cons
->expr
->where
);
1463 /* F2003, C1272 (3). */
1464 bool impure
= cons
->expr
->expr_type
== EXPR_VARIABLE
1465 && (gfc_impure_variable (cons
->expr
->symtree
->n
.sym
)
1466 || gfc_is_coindexed (cons
->expr
));
1467 if (impure
&& gfc_pure (NULL
))
1470 gfc_error ("Invalid expression in the structure constructor for "
1471 "pointer component %qs at %L in PURE procedure",
1472 comp
->name
, &cons
->expr
->where
);
1476 gfc_unset_implicit_pure (NULL
);
1483 /****************** Expression name resolution ******************/
1485 /* Returns 0 if a symbol was not declared with a type or
1486 attribute declaration statement, nonzero otherwise. */
1489 was_declared (gfc_symbol
*sym
)
1495 if (!a
.implicit_type
&& sym
->ts
.type
!= BT_UNKNOWN
)
1498 if (a
.allocatable
|| a
.dimension
|| a
.dummy
|| a
.external
|| a
.intrinsic
1499 || a
.optional
|| a
.pointer
|| a
.save
|| a
.target
|| a
.volatile_
1500 || a
.value
|| a
.access
!= ACCESS_UNKNOWN
|| a
.intent
!= INTENT_UNKNOWN
1501 || a
.asynchronous
|| a
.codimension
)
1508 /* Determine if a symbol is generic or not. */
1511 generic_sym (gfc_symbol
*sym
)
1515 if (sym
->attr
.generic
||
1516 (sym
->attr
.intrinsic
&& gfc_generic_intrinsic (sym
->name
)))
1519 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1522 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1529 return generic_sym (s
);
1536 /* Determine if a symbol is specific or not. */
1539 specific_sym (gfc_symbol
*sym
)
1543 if (sym
->attr
.if_source
== IFSRC_IFBODY
1544 || sym
->attr
.proc
== PROC_MODULE
1545 || sym
->attr
.proc
== PROC_INTERNAL
1546 || sym
->attr
.proc
== PROC_ST_FUNCTION
1547 || (sym
->attr
.intrinsic
&& gfc_specific_intrinsic (sym
->name
))
1548 || sym
->attr
.external
)
1551 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1554 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1556 return (s
== NULL
) ? 0 : specific_sym (s
);
1560 /* Figure out if the procedure is specific, generic or unknown. */
1563 { PTYPE_GENERIC
= 1, PTYPE_SPECIFIC
, PTYPE_UNKNOWN
};
1566 procedure_kind (gfc_symbol
*sym
)
1568 if (generic_sym (sym
))
1569 return PTYPE_GENERIC
;
1571 if (specific_sym (sym
))
1572 return PTYPE_SPECIFIC
;
1574 return PTYPE_UNKNOWN
;
1577 /* Check references to assumed size arrays. The flag need_full_assumed_size
1578 is nonzero when matching actual arguments. */
1580 static int need_full_assumed_size
= 0;
1583 check_assumed_size_reference (gfc_symbol
*sym
, gfc_expr
*e
)
1585 if (need_full_assumed_size
|| !(sym
->as
&& sym
->as
->type
== AS_ASSUMED_SIZE
))
1588 /* FIXME: The comparison "e->ref->u.ar.type == AR_FULL" is wrong.
1589 What should it be? */
1590 if (e
->ref
&& (e
->ref
->u
.ar
.end
[e
->ref
->u
.ar
.as
->rank
- 1] == NULL
)
1591 && (e
->ref
->u
.ar
.as
->type
== AS_ASSUMED_SIZE
)
1592 && (e
->ref
->u
.ar
.type
== AR_FULL
))
1594 gfc_error ("The upper bound in the last dimension must "
1595 "appear in the reference to the assumed size "
1596 "array %qs at %L", sym
->name
, &e
->where
);
1603 /* Look for bad assumed size array references in argument expressions
1604 of elemental and array valued intrinsic procedures. Since this is
1605 called from procedure resolution functions, it only recurses at
1609 resolve_assumed_size_actual (gfc_expr
*e
)
1614 switch (e
->expr_type
)
1617 if (e
->symtree
&& check_assumed_size_reference (e
->symtree
->n
.sym
, e
))
1622 if (resolve_assumed_size_actual (e
->value
.op
.op1
)
1623 || resolve_assumed_size_actual (e
->value
.op
.op2
))
1634 /* Check a generic procedure, passed as an actual argument, to see if
1635 there is a matching specific name. If none, it is an error, and if
1636 more than one, the reference is ambiguous. */
1638 count_specific_procs (gfc_expr
*e
)
1645 sym
= e
->symtree
->n
.sym
;
1647 for (p
= sym
->generic
; p
; p
= p
->next
)
1648 if (strcmp (sym
->name
, p
->sym
->name
) == 0)
1650 e
->symtree
= gfc_find_symtree (p
->sym
->ns
->sym_root
,
1656 gfc_error ("%qs at %L is ambiguous", e
->symtree
->n
.sym
->name
,
1660 gfc_error ("GENERIC procedure %qs is not allowed as an actual "
1661 "argument at %L", sym
->name
, &e
->where
);
1667 /* See if a call to sym could possibly be a not allowed RECURSION because of
1668 a missing RECURSIVE declaration. This means that either sym is the current
1669 context itself, or sym is the parent of a contained procedure calling its
1670 non-RECURSIVE containing procedure.
1671 This also works if sym is an ENTRY. */
1674 is_illegal_recursion (gfc_symbol
* sym
, gfc_namespace
* context
)
1676 gfc_symbol
* proc_sym
;
1677 gfc_symbol
* context_proc
;
1678 gfc_namespace
* real_context
;
1680 if (sym
->attr
.flavor
== FL_PROGRAM
1681 || gfc_fl_struct (sym
->attr
.flavor
))
1684 gcc_assert (sym
->attr
.flavor
== FL_PROCEDURE
);
1686 /* If we've got an ENTRY, find real procedure. */
1687 if (sym
->attr
.entry
&& sym
->ns
->entries
)
1688 proc_sym
= sym
->ns
->entries
->sym
;
1692 /* If sym is RECURSIVE, all is well of course. */
1693 if (proc_sym
->attr
.recursive
|| flag_recursive
)
1696 /* Find the context procedure's "real" symbol if it has entries.
1697 We look for a procedure symbol, so recurse on the parents if we don't
1698 find one (like in case of a BLOCK construct). */
1699 for (real_context
= context
; ; real_context
= real_context
->parent
)
1701 /* We should find something, eventually! */
1702 gcc_assert (real_context
);
1704 context_proc
= (real_context
->entries
? real_context
->entries
->sym
1705 : real_context
->proc_name
);
1707 /* In some special cases, there may not be a proc_name, like for this
1709 real(bad_kind()) function foo () ...
1710 when checking the call to bad_kind ().
1711 In these cases, we simply return here and assume that the
1716 if (context_proc
->attr
.flavor
!= FL_LABEL
)
1720 /* A call from sym's body to itself is recursion, of course. */
1721 if (context_proc
== proc_sym
)
1724 /* The same is true if context is a contained procedure and sym the
1726 if (context_proc
->attr
.contained
)
1728 gfc_symbol
* parent_proc
;
1730 gcc_assert (context
->parent
);
1731 parent_proc
= (context
->parent
->entries
? context
->parent
->entries
->sym
1732 : context
->parent
->proc_name
);
1734 if (parent_proc
== proc_sym
)
1742 /* Resolve an intrinsic procedure: Set its function/subroutine attribute,
1743 its typespec and formal argument list. */
1746 gfc_resolve_intrinsic (gfc_symbol
*sym
, locus
*loc
)
1748 gfc_intrinsic_sym
* isym
= NULL
;
1754 /* Already resolved. */
1755 if (sym
->from_intmod
&& sym
->ts
.type
!= BT_UNKNOWN
)
1758 /* We already know this one is an intrinsic, so we don't call
1759 gfc_is_intrinsic for full checking but rather use gfc_find_function and
1760 gfc_find_subroutine directly to check whether it is a function or
1763 if (sym
->intmod_sym_id
&& sym
->attr
.subroutine
)
1765 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1766 isym
= gfc_intrinsic_subroutine_by_id (id
);
1768 else if (sym
->intmod_sym_id
)
1770 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1771 isym
= gfc_intrinsic_function_by_id (id
);
1773 else if (!sym
->attr
.subroutine
)
1774 isym
= gfc_find_function (sym
->name
);
1776 if (isym
&& !sym
->attr
.subroutine
)
1778 if (sym
->ts
.type
!= BT_UNKNOWN
&& warn_surprising
1779 && !sym
->attr
.implicit_type
)
1780 gfc_warning (OPT_Wsurprising
,
1781 "Type specified for intrinsic function %qs at %L is"
1782 " ignored", sym
->name
, &sym
->declared_at
);
1784 if (!sym
->attr
.function
&&
1785 !gfc_add_function(&sym
->attr
, sym
->name
, loc
))
1790 else if (isym
|| (isym
= gfc_find_subroutine (sym
->name
)))
1792 if (sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.implicit_type
)
1794 gfc_error ("Intrinsic subroutine %qs at %L shall not have a type"
1795 " specifier", sym
->name
, &sym
->declared_at
);
1799 if (!sym
->attr
.subroutine
&&
1800 !gfc_add_subroutine(&sym
->attr
, sym
->name
, loc
))
1805 gfc_error ("%qs declared INTRINSIC at %L does not exist", sym
->name
,
1810 gfc_copy_formal_args_intr (sym
, isym
, NULL
);
1812 sym
->attr
.pure
= isym
->pure
;
1813 sym
->attr
.elemental
= isym
->elemental
;
1815 /* Check it is actually available in the standard settings. */
1816 if (!gfc_check_intrinsic_standard (isym
, &symstd
, false, sym
->declared_at
))
1818 gfc_error ("The intrinsic %qs declared INTRINSIC at %L is not "
1819 "available in the current standard settings but %s. Use "
1820 "an appropriate %<-std=*%> option or enable "
1821 "%<-fall-intrinsics%> in order to use it.",
1822 sym
->name
, &sym
->declared_at
, symstd
);
1830 /* Resolve a procedure expression, like passing it to a called procedure or as
1831 RHS for a procedure pointer assignment. */
1834 resolve_procedure_expression (gfc_expr
* expr
)
1838 if (expr
->expr_type
!= EXPR_VARIABLE
)
1840 gcc_assert (expr
->symtree
);
1842 sym
= expr
->symtree
->n
.sym
;
1844 if (sym
->attr
.intrinsic
)
1845 gfc_resolve_intrinsic (sym
, &expr
->where
);
1847 if (sym
->attr
.flavor
!= FL_PROCEDURE
1848 || (sym
->attr
.function
&& sym
->result
== sym
))
1851 /* A non-RECURSIVE procedure that is used as procedure expression within its
1852 own body is in danger of being called recursively. */
1853 if (is_illegal_recursion (sym
, gfc_current_ns
))
1854 gfc_warning (0, "Non-RECURSIVE procedure %qs at %L is possibly calling"
1855 " itself recursively. Declare it RECURSIVE or use"
1856 " %<-frecursive%>", sym
->name
, &expr
->where
);
1862 /* Resolve an actual argument list. Most of the time, this is just
1863 resolving the expressions in the list.
1864 The exception is that we sometimes have to decide whether arguments
1865 that look like procedure arguments are really simple variable
1869 resolve_actual_arglist (gfc_actual_arglist
*arg
, procedure_type ptype
,
1870 bool no_formal_args
)
1873 gfc_symtree
*parent_st
;
1875 gfc_component
*comp
;
1876 int save_need_full_assumed_size
;
1877 bool return_value
= false;
1878 bool actual_arg_sav
= actual_arg
, first_actual_arg_sav
= first_actual_arg
;
1881 first_actual_arg
= true;
1883 for (; arg
; arg
= arg
->next
)
1888 /* Check the label is a valid branching target. */
1891 if (arg
->label
->defined
== ST_LABEL_UNKNOWN
)
1893 gfc_error ("Label %d referenced at %L is never defined",
1894 arg
->label
->value
, &arg
->label
->where
);
1898 first_actual_arg
= false;
1902 if (e
->expr_type
== EXPR_VARIABLE
1903 && e
->symtree
->n
.sym
->attr
.generic
1905 && count_specific_procs (e
) != 1)
1908 if (e
->ts
.type
!= BT_PROCEDURE
)
1910 save_need_full_assumed_size
= need_full_assumed_size
;
1911 if (e
->expr_type
!= EXPR_VARIABLE
)
1912 need_full_assumed_size
= 0;
1913 if (!gfc_resolve_expr (e
))
1915 need_full_assumed_size
= save_need_full_assumed_size
;
1919 /* See if the expression node should really be a variable reference. */
1921 sym
= e
->symtree
->n
.sym
;
1923 if (sym
->attr
.flavor
== FL_PROCEDURE
1924 || sym
->attr
.intrinsic
1925 || sym
->attr
.external
)
1929 /* If a procedure is not already determined to be something else
1930 check if it is intrinsic. */
1931 if (gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, e
->where
))
1932 sym
->attr
.intrinsic
= 1;
1934 if (sym
->attr
.proc
== PROC_ST_FUNCTION
)
1936 gfc_error ("Statement function %qs at %L is not allowed as an "
1937 "actual argument", sym
->name
, &e
->where
);
1940 actual_ok
= gfc_intrinsic_actual_ok (sym
->name
,
1941 sym
->attr
.subroutine
);
1942 if (sym
->attr
.intrinsic
&& actual_ok
== 0)
1944 gfc_error ("Intrinsic %qs at %L is not allowed as an "
1945 "actual argument", sym
->name
, &e
->where
);
1948 if (sym
->attr
.contained
&& !sym
->attr
.use_assoc
1949 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
1951 if (!gfc_notify_std (GFC_STD_F2008
, "Internal procedure %qs is"
1952 " used as actual argument at %L",
1953 sym
->name
, &e
->where
))
1957 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
)
1959 gfc_error ("ELEMENTAL non-INTRINSIC procedure %qs is not "
1960 "allowed as an actual argument at %L", sym
->name
,
1964 /* Check if a generic interface has a specific procedure
1965 with the same name before emitting an error. */
1966 if (sym
->attr
.generic
&& count_specific_procs (e
) != 1)
1969 /* Just in case a specific was found for the expression. */
1970 sym
= e
->symtree
->n
.sym
;
1972 /* If the symbol is the function that names the current (or
1973 parent) scope, then we really have a variable reference. */
1975 if (gfc_is_function_return_value (sym
, sym
->ns
))
1978 /* If all else fails, see if we have a specific intrinsic. */
1979 if (sym
->ts
.type
== BT_UNKNOWN
&& sym
->attr
.intrinsic
)
1981 gfc_intrinsic_sym
*isym
;
1983 isym
= gfc_find_function (sym
->name
);
1984 if (isym
== NULL
|| !isym
->specific
)
1986 gfc_error ("Unable to find a specific INTRINSIC procedure "
1987 "for the reference %qs at %L", sym
->name
,
1992 sym
->attr
.intrinsic
= 1;
1993 sym
->attr
.function
= 1;
1996 if (!gfc_resolve_expr (e
))
2001 /* See if the name is a module procedure in a parent unit. */
2003 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
2006 if (gfc_find_sym_tree (sym
->name
, sym
->ns
->parent
, 1, &parent_st
))
2008 gfc_error ("Symbol %qs at %L is ambiguous", sym
->name
, &e
->where
);
2012 if (parent_st
== NULL
)
2015 sym
= parent_st
->n
.sym
;
2016 e
->symtree
= parent_st
; /* Point to the right thing. */
2018 if (sym
->attr
.flavor
== FL_PROCEDURE
2019 || sym
->attr
.intrinsic
2020 || sym
->attr
.external
)
2022 if (!gfc_resolve_expr (e
))
2028 e
->expr_type
= EXPR_VARIABLE
;
2030 if ((sym
->as
!= NULL
&& sym
->ts
.type
!= BT_CLASS
)
2031 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
2032 && CLASS_DATA (sym
)->as
))
2034 e
->rank
= sym
->ts
.type
== BT_CLASS
2035 ? CLASS_DATA (sym
)->as
->rank
: sym
->as
->rank
;
2036 e
->ref
= gfc_get_ref ();
2037 e
->ref
->type
= REF_ARRAY
;
2038 e
->ref
->u
.ar
.type
= AR_FULL
;
2039 e
->ref
->u
.ar
.as
= sym
->ts
.type
== BT_CLASS
2040 ? CLASS_DATA (sym
)->as
: sym
->as
;
2043 /* Expressions are assigned a default ts.type of BT_PROCEDURE in
2044 primary.c (match_actual_arg). If above code determines that it
2045 is a variable instead, it needs to be resolved as it was not
2046 done at the beginning of this function. */
2047 save_need_full_assumed_size
= need_full_assumed_size
;
2048 if (e
->expr_type
!= EXPR_VARIABLE
)
2049 need_full_assumed_size
= 0;
2050 if (!gfc_resolve_expr (e
))
2052 need_full_assumed_size
= save_need_full_assumed_size
;
2055 /* Check argument list functions %VAL, %LOC and %REF. There is
2056 nothing to do for %REF. */
2057 if (arg
->name
&& arg
->name
[0] == '%')
2059 if (strncmp ("%VAL", arg
->name
, 4) == 0)
2061 if (e
->ts
.type
== BT_CHARACTER
|| e
->ts
.type
== BT_DERIVED
)
2063 gfc_error ("By-value argument at %L is not of numeric "
2070 gfc_error ("By-value argument at %L cannot be an array or "
2071 "an array section", &e
->where
);
2075 /* Intrinsics are still PROC_UNKNOWN here. However,
2076 since same file external procedures are not resolvable
2077 in gfortran, it is a good deal easier to leave them to
2079 if (ptype
!= PROC_UNKNOWN
2080 && ptype
!= PROC_DUMMY
2081 && ptype
!= PROC_EXTERNAL
2082 && ptype
!= PROC_MODULE
)
2084 gfc_error ("By-value argument at %L is not allowed "
2085 "in this context", &e
->where
);
2090 /* Statement functions have already been excluded above. */
2091 else if (strncmp ("%LOC", arg
->name
, 4) == 0
2092 && e
->ts
.type
== BT_PROCEDURE
)
2094 if (e
->symtree
->n
.sym
->attr
.proc
== PROC_INTERNAL
)
2096 gfc_error ("Passing internal procedure at %L by location "
2097 "not allowed", &e
->where
);
2103 comp
= gfc_get_proc_ptr_comp(e
);
2104 if (e
->expr_type
== EXPR_VARIABLE
2105 && comp
&& comp
->attr
.elemental
)
2107 gfc_error ("ELEMENTAL procedure pointer component %qs is not "
2108 "allowed as an actual argument at %L", comp
->name
,
2112 /* Fortran 2008, C1237. */
2113 if (e
->expr_type
== EXPR_VARIABLE
&& gfc_is_coindexed (e
)
2114 && gfc_has_ultimate_pointer (e
))
2116 gfc_error ("Coindexed actual argument at %L with ultimate pointer "
2117 "component", &e
->where
);
2121 first_actual_arg
= false;
2124 return_value
= true;
2127 actual_arg
= actual_arg_sav
;
2128 first_actual_arg
= first_actual_arg_sav
;
2130 return return_value
;
2134 /* Do the checks of the actual argument list that are specific to elemental
2135 procedures. If called with c == NULL, we have a function, otherwise if
2136 expr == NULL, we have a subroutine. */
2139 resolve_elemental_actual (gfc_expr
*expr
, gfc_code
*c
)
2141 gfc_actual_arglist
*arg0
;
2142 gfc_actual_arglist
*arg
;
2143 gfc_symbol
*esym
= NULL
;
2144 gfc_intrinsic_sym
*isym
= NULL
;
2146 gfc_intrinsic_arg
*iformal
= NULL
;
2147 gfc_formal_arglist
*eformal
= NULL
;
2148 bool formal_optional
= false;
2149 bool set_by_optional
= false;
2153 /* Is this an elemental procedure? */
2154 if (expr
&& expr
->value
.function
.actual
!= NULL
)
2156 if (expr
->value
.function
.esym
!= NULL
2157 && expr
->value
.function
.esym
->attr
.elemental
)
2159 arg0
= expr
->value
.function
.actual
;
2160 esym
= expr
->value
.function
.esym
;
2162 else if (expr
->value
.function
.isym
!= NULL
2163 && expr
->value
.function
.isym
->elemental
)
2165 arg0
= expr
->value
.function
.actual
;
2166 isym
= expr
->value
.function
.isym
;
2171 else if (c
&& c
->ext
.actual
!= NULL
)
2173 arg0
= c
->ext
.actual
;
2175 if (c
->resolved_sym
)
2176 esym
= c
->resolved_sym
;
2178 esym
= c
->symtree
->n
.sym
;
2181 if (!esym
->attr
.elemental
)
2187 /* The rank of an elemental is the rank of its array argument(s). */
2188 for (arg
= arg0
; arg
; arg
= arg
->next
)
2190 if (arg
->expr
!= NULL
&& arg
->expr
->rank
!= 0)
2192 rank
= arg
->expr
->rank
;
2193 if (arg
->expr
->expr_type
== EXPR_VARIABLE
2194 && arg
->expr
->symtree
->n
.sym
->attr
.optional
)
2195 set_by_optional
= true;
2197 /* Function specific; set the result rank and shape. */
2201 if (!expr
->shape
&& arg
->expr
->shape
)
2203 expr
->shape
= gfc_get_shape (rank
);
2204 for (i
= 0; i
< rank
; i
++)
2205 mpz_init_set (expr
->shape
[i
], arg
->expr
->shape
[i
]);
2212 /* If it is an array, it shall not be supplied as an actual argument
2213 to an elemental procedure unless an array of the same rank is supplied
2214 as an actual argument corresponding to a nonoptional dummy argument of
2215 that elemental procedure(12.4.1.5). */
2216 formal_optional
= false;
2218 iformal
= isym
->formal
;
2220 eformal
= esym
->formal
;
2222 for (arg
= arg0
; arg
; arg
= arg
->next
)
2226 if (eformal
->sym
&& eformal
->sym
->attr
.optional
)
2227 formal_optional
= true;
2228 eformal
= eformal
->next
;
2230 else if (isym
&& iformal
)
2232 if (iformal
->optional
)
2233 formal_optional
= true;
2234 iformal
= iformal
->next
;
2237 formal_optional
= true;
2239 if (pedantic
&& arg
->expr
!= NULL
2240 && arg
->expr
->expr_type
== EXPR_VARIABLE
2241 && arg
->expr
->symtree
->n
.sym
->attr
.optional
2244 && (set_by_optional
|| arg
->expr
->rank
!= rank
)
2245 && !(isym
&& isym
->id
== GFC_ISYM_CONVERSION
))
2247 gfc_warning (OPT_Wpedantic
,
2248 "%qs at %L is an array and OPTIONAL; IF IT IS "
2249 "MISSING, it cannot be the actual argument of an "
2250 "ELEMENTAL procedure unless there is a non-optional "
2251 "argument with the same rank (12.4.1.5)",
2252 arg
->expr
->symtree
->n
.sym
->name
, &arg
->expr
->where
);
2256 for (arg
= arg0
; arg
; arg
= arg
->next
)
2258 if (arg
->expr
== NULL
|| arg
->expr
->rank
== 0)
2261 /* Being elemental, the last upper bound of an assumed size array
2262 argument must be present. */
2263 if (resolve_assumed_size_actual (arg
->expr
))
2266 /* Elemental procedure's array actual arguments must conform. */
2269 if (!gfc_check_conformance (arg
->expr
, e
, "elemental procedure"))
2276 /* INTENT(OUT) is only allowed for subroutines; if any actual argument
2277 is an array, the intent inout/out variable needs to be also an array. */
2278 if (rank
> 0 && esym
&& expr
== NULL
)
2279 for (eformal
= esym
->formal
, arg
= arg0
; arg
&& eformal
;
2280 arg
= arg
->next
, eformal
= eformal
->next
)
2281 if ((eformal
->sym
->attr
.intent
== INTENT_OUT
2282 || eformal
->sym
->attr
.intent
== INTENT_INOUT
)
2283 && arg
->expr
&& arg
->expr
->rank
== 0)
2285 gfc_error ("Actual argument at %L for INTENT(%s) dummy %qs of "
2286 "ELEMENTAL subroutine %qs is a scalar, but another "
2287 "actual argument is an array", &arg
->expr
->where
,
2288 (eformal
->sym
->attr
.intent
== INTENT_OUT
) ? "OUT"
2289 : "INOUT", eformal
->sym
->name
, esym
->name
);
2296 /* This function does the checking of references to global procedures
2297 as defined in sections 18.1 and 14.1, respectively, of the Fortran
2298 77 and 95 standards. It checks for a gsymbol for the name, making
2299 one if it does not already exist. If it already exists, then the
2300 reference being resolved must correspond to the type of gsymbol.
2301 Otherwise, the new symbol is equipped with the attributes of the
2302 reference. The corresponding code that is called in creating
2303 global entities is parse.c.
2305 In addition, for all but -std=legacy, the gsymbols are used to
2306 check the interfaces of external procedures from the same file.
2307 The namespace of the gsymbol is resolved and then, once this is
2308 done the interface is checked. */
2312 not_in_recursive (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2314 if (!gsym_ns
->proc_name
->attr
.recursive
)
2317 if (sym
->ns
== gsym_ns
)
2320 if (sym
->ns
->parent
&& sym
->ns
->parent
== gsym_ns
)
2327 not_entry_self_reference (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2329 if (gsym_ns
->entries
)
2331 gfc_entry_list
*entry
= gsym_ns
->entries
;
2333 for (; entry
; entry
= entry
->next
)
2335 if (strcmp (sym
->name
, entry
->sym
->name
) == 0)
2337 if (strcmp (gsym_ns
->proc_name
->name
,
2338 sym
->ns
->proc_name
->name
) == 0)
2342 && strcmp (gsym_ns
->proc_name
->name
,
2343 sym
->ns
->parent
->proc_name
->name
) == 0)
2352 /* Check for the requirement of an explicit interface. F08:12.4.2.2. */
2355 gfc_explicit_interface_required (gfc_symbol
*sym
, char *errmsg
, int err_len
)
2357 gfc_formal_arglist
*arg
= gfc_sym_get_dummy_args (sym
);
2359 for ( ; arg
; arg
= arg
->next
)
2364 if (arg
->sym
->attr
.allocatable
) /* (2a) */
2366 strncpy (errmsg
, _("allocatable argument"), err_len
);
2369 else if (arg
->sym
->attr
.asynchronous
)
2371 strncpy (errmsg
, _("asynchronous argument"), err_len
);
2374 else if (arg
->sym
->attr
.optional
)
2376 strncpy (errmsg
, _("optional argument"), err_len
);
2379 else if (arg
->sym
->attr
.pointer
)
2381 strncpy (errmsg
, _("pointer argument"), err_len
);
2384 else if (arg
->sym
->attr
.target
)
2386 strncpy (errmsg
, _("target argument"), err_len
);
2389 else if (arg
->sym
->attr
.value
)
2391 strncpy (errmsg
, _("value argument"), err_len
);
2394 else if (arg
->sym
->attr
.volatile_
)
2396 strncpy (errmsg
, _("volatile argument"), err_len
);
2399 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_SHAPE
) /* (2b) */
2401 strncpy (errmsg
, _("assumed-shape argument"), err_len
);
2404 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_RANK
) /* TS 29113, 6.2. */
2406 strncpy (errmsg
, _("assumed-rank argument"), err_len
);
2409 else if (arg
->sym
->attr
.codimension
) /* (2c) */
2411 strncpy (errmsg
, _("coarray argument"), err_len
);
2414 else if (false) /* (2d) TODO: parametrized derived type */
2416 strncpy (errmsg
, _("parametrized derived type argument"), err_len
);
2419 else if (arg
->sym
->ts
.type
== BT_CLASS
) /* (2e) */
2421 strncpy (errmsg
, _("polymorphic argument"), err_len
);
2424 else if (arg
->sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
2426 strncpy (errmsg
, _("NO_ARG_CHECK attribute"), err_len
);
2429 else if (arg
->sym
->ts
.type
== BT_ASSUMED
)
2431 /* As assumed-type is unlimited polymorphic (cf. above).
2432 See also TS 29113, Note 6.1. */
2433 strncpy (errmsg
, _("assumed-type argument"), err_len
);
2438 if (sym
->attr
.function
)
2440 gfc_symbol
*res
= sym
->result
? sym
->result
: sym
;
2442 if (res
->attr
.dimension
) /* (3a) */
2444 strncpy (errmsg
, _("array result"), err_len
);
2447 else if (res
->attr
.pointer
|| res
->attr
.allocatable
) /* (3b) */
2449 strncpy (errmsg
, _("pointer or allocatable result"), err_len
);
2452 else if (res
->ts
.type
== BT_CHARACTER
&& res
->ts
.u
.cl
2453 && res
->ts
.u
.cl
->length
2454 && res
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
) /* (3c) */
2456 strncpy (errmsg
, _("result with non-constant character length"), err_len
);
2461 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
) /* (4) */
2463 strncpy (errmsg
, _("elemental procedure"), err_len
);
2466 else if (sym
->attr
.is_bind_c
) /* (5) */
2468 strncpy (errmsg
, _("bind(c) procedure"), err_len
);
2477 resolve_global_procedure (gfc_symbol
*sym
, locus
*where
,
2478 gfc_actual_arglist
**actual
, int sub
)
2482 enum gfc_symbol_type type
;
2485 type
= sub
? GSYM_SUBROUTINE
: GSYM_FUNCTION
;
2487 gsym
= gfc_get_gsymbol (sym
->binding_label
? sym
->binding_label
: sym
->name
);
2489 if ((gsym
->type
!= GSYM_UNKNOWN
&& gsym
->type
!= type
))
2490 gfc_global_used (gsym
, where
);
2492 if ((sym
->attr
.if_source
== IFSRC_UNKNOWN
2493 || sym
->attr
.if_source
== IFSRC_IFBODY
)
2494 && gsym
->type
!= GSYM_UNKNOWN
2495 && !gsym
->binding_label
2497 && gsym
->ns
->resolved
!= -1
2498 && gsym
->ns
->proc_name
2499 && not_in_recursive (sym
, gsym
->ns
)
2500 && not_entry_self_reference (sym
, gsym
->ns
))
2502 gfc_symbol
*def_sym
;
2504 /* Resolve the gsymbol namespace if needed. */
2505 if (!gsym
->ns
->resolved
)
2507 gfc_dt_list
*old_dt_list
;
2509 /* Stash away derived types so that the backend_decls do not
2511 old_dt_list
= gfc_derived_types
;
2512 gfc_derived_types
= NULL
;
2514 gfc_resolve (gsym
->ns
);
2516 /* Store the new derived types with the global namespace. */
2517 if (gfc_derived_types
)
2518 gsym
->ns
->derived_types
= gfc_derived_types
;
2520 /* Restore the derived types of this namespace. */
2521 gfc_derived_types
= old_dt_list
;
2524 /* Make sure that translation for the gsymbol occurs before
2525 the procedure currently being resolved. */
2526 ns
= gfc_global_ns_list
;
2527 for (; ns
&& ns
!= gsym
->ns
; ns
= ns
->sibling
)
2529 if (ns
->sibling
== gsym
->ns
)
2531 ns
->sibling
= gsym
->ns
->sibling
;
2532 gsym
->ns
->sibling
= gfc_global_ns_list
;
2533 gfc_global_ns_list
= gsym
->ns
;
2538 def_sym
= gsym
->ns
->proc_name
;
2540 /* This can happen if a binding name has been specified. */
2541 if (gsym
->binding_label
&& gsym
->sym_name
!= def_sym
->name
)
2542 gfc_find_symbol (gsym
->sym_name
, gsym
->ns
, 0, &def_sym
);
2544 if (def_sym
->attr
.entry_master
)
2546 gfc_entry_list
*entry
;
2547 for (entry
= gsym
->ns
->entries
; entry
; entry
= entry
->next
)
2548 if (strcmp (entry
->sym
->name
, sym
->name
) == 0)
2550 def_sym
= entry
->sym
;
2555 if (sym
->attr
.function
&& !gfc_compare_types (&sym
->ts
, &def_sym
->ts
))
2557 gfc_error ("Return type mismatch of function %qs at %L (%s/%s)",
2558 sym
->name
, &sym
->declared_at
, gfc_typename (&sym
->ts
),
2559 gfc_typename (&def_sym
->ts
));
2563 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
2564 && gfc_explicit_interface_required (def_sym
, reason
, sizeof(reason
)))
2566 gfc_error ("Explicit interface required for %qs at %L: %s",
2567 sym
->name
, &sym
->declared_at
, reason
);
2571 if (!pedantic
&& (gfc_option
.allow_std
& GFC_STD_GNU
))
2572 /* Turn erros into warnings with -std=gnu and -std=legacy. */
2573 gfc_errors_to_warnings (true);
2575 if (!gfc_compare_interfaces (sym
, def_sym
, sym
->name
, 0, 1,
2576 reason
, sizeof(reason
), NULL
, NULL
))
2578 gfc_error_opt (OPT_Wargument_mismatch
,
2579 "Interface mismatch in global procedure %qs at %L:"
2580 " %s", sym
->name
, &sym
->declared_at
, reason
);
2585 || ((gfc_option
.warn_std
& GFC_STD_LEGACY
)
2586 && !(gfc_option
.warn_std
& GFC_STD_GNU
)))
2587 gfc_errors_to_warnings (true);
2589 if (sym
->attr
.if_source
!= IFSRC_IFBODY
)
2590 gfc_procedure_use (def_sym
, actual
, where
);
2594 gfc_errors_to_warnings (false);
2596 if (gsym
->type
== GSYM_UNKNOWN
)
2599 gsym
->where
= *where
;
2606 /************* Function resolution *************/
2608 /* Resolve a function call known to be generic.
2609 Section 14.1.2.4.1. */
2612 resolve_generic_f0 (gfc_expr
*expr
, gfc_symbol
*sym
)
2616 if (sym
->attr
.generic
)
2618 s
= gfc_search_interface (sym
->generic
, 0, &expr
->value
.function
.actual
);
2621 expr
->value
.function
.name
= s
->name
;
2622 expr
->value
.function
.esym
= s
;
2624 if (s
->ts
.type
!= BT_UNKNOWN
)
2626 else if (s
->result
!= NULL
&& s
->result
->ts
.type
!= BT_UNKNOWN
)
2627 expr
->ts
= s
->result
->ts
;
2630 expr
->rank
= s
->as
->rank
;
2631 else if (s
->result
!= NULL
&& s
->result
->as
!= NULL
)
2632 expr
->rank
= s
->result
->as
->rank
;
2634 gfc_set_sym_referenced (expr
->value
.function
.esym
);
2639 /* TODO: Need to search for elemental references in generic
2643 if (sym
->attr
.intrinsic
)
2644 return gfc_intrinsic_func_interface (expr
, 0);
2651 resolve_generic_f (gfc_expr
*expr
)
2655 gfc_interface
*intr
= NULL
;
2657 sym
= expr
->symtree
->n
.sym
;
2661 m
= resolve_generic_f0 (expr
, sym
);
2664 else if (m
== MATCH_ERROR
)
2669 for (intr
= sym
->generic
; intr
; intr
= intr
->next
)
2670 if (gfc_fl_struct (intr
->sym
->attr
.flavor
))
2673 if (sym
->ns
->parent
== NULL
)
2675 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2679 if (!generic_sym (sym
))
2683 /* Last ditch attempt. See if the reference is to an intrinsic
2684 that possesses a matching interface. 14.1.2.4 */
2685 if (sym
&& !intr
&& !gfc_is_intrinsic (sym
, 0, expr
->where
))
2687 if (gfc_init_expr_flag
)
2688 gfc_error ("Function %qs in initialization expression at %L "
2689 "must be an intrinsic function",
2690 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2692 gfc_error ("There is no specific function for the generic %qs "
2693 "at %L", expr
->symtree
->n
.sym
->name
, &expr
->where
);
2699 if (!gfc_convert_to_structure_constructor (expr
, intr
->sym
, NULL
,
2702 if (!gfc_use_derived (expr
->ts
.u
.derived
))
2704 return resolve_structure_cons (expr
, 0);
2707 m
= gfc_intrinsic_func_interface (expr
, 0);
2712 gfc_error ("Generic function %qs at %L is not consistent with a "
2713 "specific intrinsic interface", expr
->symtree
->n
.sym
->name
,
2720 /* Resolve a function call known to be specific. */
2723 resolve_specific_f0 (gfc_symbol
*sym
, gfc_expr
*expr
)
2727 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
2729 if (sym
->attr
.dummy
)
2731 sym
->attr
.proc
= PROC_DUMMY
;
2735 sym
->attr
.proc
= PROC_EXTERNAL
;
2739 if (sym
->attr
.proc
== PROC_MODULE
2740 || sym
->attr
.proc
== PROC_ST_FUNCTION
2741 || sym
->attr
.proc
== PROC_INTERNAL
)
2744 if (sym
->attr
.intrinsic
)
2746 m
= gfc_intrinsic_func_interface (expr
, 1);
2750 gfc_error ("Function %qs at %L is INTRINSIC but is not compatible "
2751 "with an intrinsic", sym
->name
, &expr
->where
);
2759 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2762 expr
->ts
= sym
->result
->ts
;
2765 expr
->value
.function
.name
= sym
->name
;
2766 expr
->value
.function
.esym
= sym
;
2767 /* Prevent crash when sym->ts.u.derived->components is not set due to previous
2769 if (sym
->ts
.type
== BT_CLASS
&& !CLASS_DATA (sym
))
2771 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)
2772 expr
->rank
= CLASS_DATA (sym
)->as
->rank
;
2773 else if (sym
->as
!= NULL
)
2774 expr
->rank
= sym
->as
->rank
;
2781 resolve_specific_f (gfc_expr
*expr
)
2786 sym
= expr
->symtree
->n
.sym
;
2790 m
= resolve_specific_f0 (sym
, expr
);
2793 if (m
== MATCH_ERROR
)
2796 if (sym
->ns
->parent
== NULL
)
2799 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2805 gfc_error ("Unable to resolve the specific function %qs at %L",
2806 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2811 /* Recursively append candidate SYM to CANDIDATES. Store the number of
2812 candidates in CANDIDATES_LEN. */
2815 lookup_function_fuzzy_find_candidates (gfc_symtree
*sym
,
2817 size_t &candidates_len
)
2823 if ((sym
->n
.sym
->ts
.type
!= BT_UNKNOWN
|| sym
->n
.sym
->attr
.external
)
2824 && sym
->n
.sym
->attr
.flavor
== FL_PROCEDURE
)
2825 vec_push (candidates
, candidates_len
, sym
->name
);
2829 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2833 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2837 /* Lookup function FN fuzzily, taking names in SYMROOT into account. */
2840 gfc_lookup_function_fuzzy (const char *fn
, gfc_symtree
*symroot
)
2842 char **candidates
= NULL
;
2843 size_t candidates_len
= 0;
2844 lookup_function_fuzzy_find_candidates (symroot
, candidates
, candidates_len
);
2845 return gfc_closest_fuzzy_match (fn
, candidates
);
2849 /* Resolve a procedure call not known to be generic nor specific. */
2852 resolve_unknown_f (gfc_expr
*expr
)
2857 sym
= expr
->symtree
->n
.sym
;
2859 if (sym
->attr
.dummy
)
2861 sym
->attr
.proc
= PROC_DUMMY
;
2862 expr
->value
.function
.name
= sym
->name
;
2866 /* See if we have an intrinsic function reference. */
2868 if (gfc_is_intrinsic (sym
, 0, expr
->where
))
2870 if (gfc_intrinsic_func_interface (expr
, 1) == MATCH_YES
)
2875 /* The reference is to an external name. */
2877 sym
->attr
.proc
= PROC_EXTERNAL
;
2878 expr
->value
.function
.name
= sym
->name
;
2879 expr
->value
.function
.esym
= expr
->symtree
->n
.sym
;
2881 if (sym
->as
!= NULL
)
2882 expr
->rank
= sym
->as
->rank
;
2884 /* Type of the expression is either the type of the symbol or the
2885 default type of the symbol. */
2888 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2890 if (sym
->ts
.type
!= BT_UNKNOWN
)
2894 ts
= gfc_get_default_type (sym
->name
, sym
->ns
);
2896 if (ts
->type
== BT_UNKNOWN
)
2899 = gfc_lookup_function_fuzzy (sym
->name
, sym
->ns
->sym_root
);
2901 gfc_error ("Function %qs at %L has no IMPLICIT type"
2902 "; did you mean %qs?",
2903 sym
->name
, &expr
->where
, guessed
);
2905 gfc_error ("Function %qs at %L has no IMPLICIT type",
2906 sym
->name
, &expr
->where
);
2917 /* Return true, if the symbol is an external procedure. */
2919 is_external_proc (gfc_symbol
*sym
)
2921 if (!sym
->attr
.dummy
&& !sym
->attr
.contained
2922 && !gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, sym
->declared_at
)
2923 && sym
->attr
.proc
!= PROC_ST_FUNCTION
2924 && !sym
->attr
.proc_pointer
2925 && !sym
->attr
.use_assoc
2933 /* Figure out if a function reference is pure or not. Also set the name
2934 of the function for a potential error message. Return nonzero if the
2935 function is PURE, zero if not. */
2937 pure_stmt_function (gfc_expr
*, gfc_symbol
*);
2940 pure_function (gfc_expr
*e
, const char **name
)
2943 gfc_component
*comp
;
2947 if (e
->symtree
!= NULL
2948 && e
->symtree
->n
.sym
!= NULL
2949 && e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
2950 return pure_stmt_function (e
, e
->symtree
->n
.sym
);
2952 comp
= gfc_get_proc_ptr_comp (e
);
2955 pure
= gfc_pure (comp
->ts
.interface
);
2958 else if (e
->value
.function
.esym
)
2960 pure
= gfc_pure (e
->value
.function
.esym
);
2961 *name
= e
->value
.function
.esym
->name
;
2963 else if (e
->value
.function
.isym
)
2965 pure
= e
->value
.function
.isym
->pure
2966 || e
->value
.function
.isym
->elemental
;
2967 *name
= e
->value
.function
.isym
->name
;
2971 /* Implicit functions are not pure. */
2973 *name
= e
->value
.function
.name
;
2981 impure_stmt_fcn (gfc_expr
*e
, gfc_symbol
*sym
,
2982 int *f ATTRIBUTE_UNUSED
)
2986 /* Don't bother recursing into other statement functions
2987 since they will be checked individually for purity. */
2988 if (e
->expr_type
!= EXPR_FUNCTION
2990 || e
->symtree
->n
.sym
== sym
2991 || e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
2994 return pure_function (e
, &name
) ? false : true;
2999 pure_stmt_function (gfc_expr
*e
, gfc_symbol
*sym
)
3001 return gfc_traverse_expr (e
, sym
, impure_stmt_fcn
, 0) ? 0 : 1;
3005 /* Check if an impure function is allowed in the current context. */
3007 static bool check_pure_function (gfc_expr
*e
)
3009 const char *name
= NULL
;
3010 if (!pure_function (e
, &name
) && name
)
3014 gfc_error ("Reference to impure function %qs at %L inside a "
3015 "FORALL %s", name
, &e
->where
,
3016 forall_flag
== 2 ? "mask" : "block");
3019 else if (gfc_do_concurrent_flag
)
3021 gfc_error ("Reference to impure function %qs at %L inside a "
3022 "DO CONCURRENT %s", name
, &e
->where
,
3023 gfc_do_concurrent_flag
== 2 ? "mask" : "block");
3026 else if (gfc_pure (NULL
))
3028 gfc_error ("Reference to impure function %qs at %L "
3029 "within a PURE procedure", name
, &e
->where
);
3032 gfc_unset_implicit_pure (NULL
);
3038 /* Update current procedure's array_outer_dependency flag, considering
3039 a call to procedure SYM. */
3042 update_current_proc_array_outer_dependency (gfc_symbol
*sym
)
3044 /* Check to see if this is a sibling function that has not yet
3046 gfc_namespace
*sibling
= gfc_current_ns
->sibling
;
3047 for (; sibling
; sibling
= sibling
->sibling
)
3049 if (sibling
->proc_name
== sym
)
3051 gfc_resolve (sibling
);
3056 /* If SYM has references to outer arrays, so has the procedure calling
3057 SYM. If SYM is a procedure pointer, we can assume the worst. */
3058 if (sym
->attr
.array_outer_dependency
3059 || sym
->attr
.proc_pointer
)
3060 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3064 /* Resolve a function call, which means resolving the arguments, then figuring
3065 out which entity the name refers to. */
3068 resolve_function (gfc_expr
*expr
)
3070 gfc_actual_arglist
*arg
;
3074 procedure_type p
= PROC_INTRINSIC
;
3075 bool no_formal_args
;
3079 sym
= expr
->symtree
->n
.sym
;
3081 /* If this is a procedure pointer component, it has already been resolved. */
3082 if (gfc_is_proc_ptr_comp (expr
))
3085 /* Avoid re-resolving the arguments of caf_get, which can lead to inserting
3087 if (sym
&& sym
->attr
.intrinsic
3088 && (sym
->intmod_sym_id
== GFC_ISYM_CAF_GET
3089 || sym
->intmod_sym_id
== GFC_ISYM_CAF_SEND
))
3092 if (sym
&& sym
->attr
.intrinsic
3093 && !gfc_resolve_intrinsic (sym
, &expr
->where
))
3096 if (sym
&& (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.subroutine
))
3098 gfc_error ("%qs at %L is not a function", sym
->name
, &expr
->where
);
3102 /* If this ia a deferred TBP with an abstract interface (which may
3103 of course be referenced), expr->value.function.esym will be set. */
3104 if (sym
&& sym
->attr
.abstract
&& !expr
->value
.function
.esym
)
3106 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3107 sym
->name
, &expr
->where
);
3111 /* Switch off assumed size checking and do this again for certain kinds
3112 of procedure, once the procedure itself is resolved. */
3113 need_full_assumed_size
++;
3115 if (expr
->symtree
&& expr
->symtree
->n
.sym
)
3116 p
= expr
->symtree
->n
.sym
->attr
.proc
;
3118 if (expr
->value
.function
.isym
&& expr
->value
.function
.isym
->inquiry
)
3119 inquiry_argument
= true;
3120 no_formal_args
= sym
&& is_external_proc (sym
)
3121 && gfc_sym_get_dummy_args (sym
) == NULL
;
3123 if (!resolve_actual_arglist (expr
->value
.function
.actual
,
3126 inquiry_argument
= false;
3130 inquiry_argument
= false;
3132 /* Resume assumed_size checking. */
3133 need_full_assumed_size
--;
3135 /* If the procedure is external, check for usage. */
3136 if (sym
&& is_external_proc (sym
))
3137 resolve_global_procedure (sym
, &expr
->where
,
3138 &expr
->value
.function
.actual
, 0);
3140 if (sym
&& sym
->ts
.type
== BT_CHARACTER
3142 && sym
->ts
.u
.cl
->length
== NULL
3144 && !sym
->ts
.deferred
3145 && expr
->value
.function
.esym
== NULL
3146 && !sym
->attr
.contained
)
3148 /* Internal procedures are taken care of in resolve_contained_fntype. */
3149 gfc_error ("Function %qs is declared CHARACTER(*) and cannot "
3150 "be used at %L since it is not a dummy argument",
3151 sym
->name
, &expr
->where
);
3155 /* See if function is already resolved. */
3157 if (expr
->value
.function
.name
!= NULL
3158 || expr
->value
.function
.isym
!= NULL
)
3160 if (expr
->ts
.type
== BT_UNKNOWN
)
3166 /* Apply the rules of section 14.1.2. */
3168 switch (procedure_kind (sym
))
3171 t
= resolve_generic_f (expr
);
3174 case PTYPE_SPECIFIC
:
3175 t
= resolve_specific_f (expr
);
3179 t
= resolve_unknown_f (expr
);
3183 gfc_internal_error ("resolve_function(): bad function type");
3187 /* If the expression is still a function (it might have simplified),
3188 then we check to see if we are calling an elemental function. */
3190 if (expr
->expr_type
!= EXPR_FUNCTION
)
3193 temp
= need_full_assumed_size
;
3194 need_full_assumed_size
= 0;
3196 if (!resolve_elemental_actual (expr
, NULL
))
3199 if (omp_workshare_flag
3200 && expr
->value
.function
.esym
3201 && ! gfc_elemental (expr
->value
.function
.esym
))
3203 gfc_error ("User defined non-ELEMENTAL function %qs at %L not allowed "
3204 "in WORKSHARE construct", expr
->value
.function
.esym
->name
,
3209 #define GENERIC_ID expr->value.function.isym->id
3210 else if (expr
->value
.function
.actual
!= NULL
3211 && expr
->value
.function
.isym
!= NULL
3212 && GENERIC_ID
!= GFC_ISYM_LBOUND
3213 && GENERIC_ID
!= GFC_ISYM_LCOBOUND
3214 && GENERIC_ID
!= GFC_ISYM_UCOBOUND
3215 && GENERIC_ID
!= GFC_ISYM_LEN
3216 && GENERIC_ID
!= GFC_ISYM_LOC
3217 && GENERIC_ID
!= GFC_ISYM_C_LOC
3218 && GENERIC_ID
!= GFC_ISYM_PRESENT
)
3220 /* Array intrinsics must also have the last upper bound of an
3221 assumed size array argument. UBOUND and SIZE have to be
3222 excluded from the check if the second argument is anything
3225 for (arg
= expr
->value
.function
.actual
; arg
; arg
= arg
->next
)
3227 if ((GENERIC_ID
== GFC_ISYM_UBOUND
|| GENERIC_ID
== GFC_ISYM_SIZE
)
3228 && arg
== expr
->value
.function
.actual
3229 && arg
->next
!= NULL
&& arg
->next
->expr
)
3231 if (arg
->next
->expr
->expr_type
!= EXPR_CONSTANT
)
3234 if (arg
->next
->name
&& strncmp (arg
->next
->name
, "kind", 4) == 0)
3237 if ((int)mpz_get_si (arg
->next
->expr
->value
.integer
)
3242 if (arg
->expr
!= NULL
3243 && arg
->expr
->rank
> 0
3244 && resolve_assumed_size_actual (arg
->expr
))
3250 need_full_assumed_size
= temp
;
3252 if (!check_pure_function(expr
))
3255 /* Functions without the RECURSIVE attribution are not allowed to
3256 * call themselves. */
3257 if (expr
->value
.function
.esym
&& !expr
->value
.function
.esym
->attr
.recursive
)
3260 esym
= expr
->value
.function
.esym
;
3262 if (is_illegal_recursion (esym
, gfc_current_ns
))
3264 if (esym
->attr
.entry
&& esym
->ns
->entries
)
3265 gfc_error ("ENTRY %qs at %L cannot be called recursively, as"
3266 " function %qs is not RECURSIVE",
3267 esym
->name
, &expr
->where
, esym
->ns
->entries
->sym
->name
);
3269 gfc_error ("Function %qs at %L cannot be called recursively, as it"
3270 " is not RECURSIVE", esym
->name
, &expr
->where
);
3276 /* Character lengths of use associated functions may contains references to
3277 symbols not referenced from the current program unit otherwise. Make sure
3278 those symbols are marked as referenced. */
3280 if (expr
->ts
.type
== BT_CHARACTER
&& expr
->value
.function
.esym
3281 && expr
->value
.function
.esym
->attr
.use_assoc
)
3283 gfc_expr_set_symbols_referenced (expr
->ts
.u
.cl
->length
);
3286 /* Make sure that the expression has a typespec that works. */
3287 if (expr
->ts
.type
== BT_UNKNOWN
)
3289 if (expr
->symtree
->n
.sym
->result
3290 && expr
->symtree
->n
.sym
->result
->ts
.type
!= BT_UNKNOWN
3291 && !expr
->symtree
->n
.sym
->result
->attr
.proc_pointer
)
3292 expr
->ts
= expr
->symtree
->n
.sym
->result
->ts
;
3295 if (!expr
->ref
&& !expr
->value
.function
.isym
)
3297 if (expr
->value
.function
.esym
)
3298 update_current_proc_array_outer_dependency (expr
->value
.function
.esym
);
3300 update_current_proc_array_outer_dependency (sym
);
3303 /* typebound procedure: Assume the worst. */
3304 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3310 /************* Subroutine resolution *************/
3313 pure_subroutine (gfc_symbol
*sym
, const char *name
, locus
*loc
)
3320 gfc_error ("Subroutine call to %qs in FORALL block at %L is not PURE",
3324 else if (gfc_do_concurrent_flag
)
3326 gfc_error ("Subroutine call to %qs in DO CONCURRENT block at %L is not "
3330 else if (gfc_pure (NULL
))
3332 gfc_error ("Subroutine call to %qs at %L is not PURE", name
, loc
);
3336 gfc_unset_implicit_pure (NULL
);
3342 resolve_generic_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3346 if (sym
->attr
.generic
)
3348 s
= gfc_search_interface (sym
->generic
, 1, &c
->ext
.actual
);
3351 c
->resolved_sym
= s
;
3352 if (!pure_subroutine (s
, s
->name
, &c
->loc
))
3357 /* TODO: Need to search for elemental references in generic interface. */
3360 if (sym
->attr
.intrinsic
)
3361 return gfc_intrinsic_sub_interface (c
, 0);
3368 resolve_generic_s (gfc_code
*c
)
3373 sym
= c
->symtree
->n
.sym
;
3377 m
= resolve_generic_s0 (c
, sym
);
3380 else if (m
== MATCH_ERROR
)
3384 if (sym
->ns
->parent
== NULL
)
3386 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3390 if (!generic_sym (sym
))
3394 /* Last ditch attempt. See if the reference is to an intrinsic
3395 that possesses a matching interface. 14.1.2.4 */
3396 sym
= c
->symtree
->n
.sym
;
3398 if (!gfc_is_intrinsic (sym
, 1, c
->loc
))
3400 gfc_error ("There is no specific subroutine for the generic %qs at %L",
3401 sym
->name
, &c
->loc
);
3405 m
= gfc_intrinsic_sub_interface (c
, 0);
3409 gfc_error ("Generic subroutine %qs at %L is not consistent with an "
3410 "intrinsic subroutine interface", sym
->name
, &c
->loc
);
3416 /* Resolve a subroutine call known to be specific. */
3419 resolve_specific_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3423 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
3425 if (sym
->attr
.dummy
)
3427 sym
->attr
.proc
= PROC_DUMMY
;
3431 sym
->attr
.proc
= PROC_EXTERNAL
;
3435 if (sym
->attr
.proc
== PROC_MODULE
|| sym
->attr
.proc
== PROC_INTERNAL
)
3438 if (sym
->attr
.intrinsic
)
3440 m
= gfc_intrinsic_sub_interface (c
, 1);
3444 gfc_error ("Subroutine %qs at %L is INTRINSIC but is not compatible "
3445 "with an intrinsic", sym
->name
, &c
->loc
);
3453 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3455 c
->resolved_sym
= sym
;
3456 if (!pure_subroutine (sym
, sym
->name
, &c
->loc
))
3464 resolve_specific_s (gfc_code
*c
)
3469 sym
= c
->symtree
->n
.sym
;
3473 m
= resolve_specific_s0 (c
, sym
);
3476 if (m
== MATCH_ERROR
)
3479 if (sym
->ns
->parent
== NULL
)
3482 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3488 sym
= c
->symtree
->n
.sym
;
3489 gfc_error ("Unable to resolve the specific subroutine %qs at %L",
3490 sym
->name
, &c
->loc
);
3496 /* Resolve a subroutine call not known to be generic nor specific. */
3499 resolve_unknown_s (gfc_code
*c
)
3503 sym
= c
->symtree
->n
.sym
;
3505 if (sym
->attr
.dummy
)
3507 sym
->attr
.proc
= PROC_DUMMY
;
3511 /* See if we have an intrinsic function reference. */
3513 if (gfc_is_intrinsic (sym
, 1, c
->loc
))
3515 if (gfc_intrinsic_sub_interface (c
, 1) == MATCH_YES
)
3520 /* The reference is to an external name. */
3523 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3525 c
->resolved_sym
= sym
;
3527 return pure_subroutine (sym
, sym
->name
, &c
->loc
);
3531 /* Resolve a subroutine call. Although it was tempting to use the same code
3532 for functions, subroutines and functions are stored differently and this
3533 makes things awkward. */
3536 resolve_call (gfc_code
*c
)
3539 procedure_type ptype
= PROC_INTRINSIC
;
3540 gfc_symbol
*csym
, *sym
;
3541 bool no_formal_args
;
3543 csym
= c
->symtree
? c
->symtree
->n
.sym
: NULL
;
3545 if (csym
&& csym
->ts
.type
!= BT_UNKNOWN
)
3547 gfc_error ("%qs at %L has a type, which is not consistent with "
3548 "the CALL at %L", csym
->name
, &csym
->declared_at
, &c
->loc
);
3552 if (csym
&& gfc_current_ns
->parent
&& csym
->ns
!= gfc_current_ns
)
3555 gfc_find_sym_tree (c
->symtree
->name
, gfc_current_ns
, 1, &st
);
3556 sym
= st
? st
->n
.sym
: NULL
;
3557 if (sym
&& csym
!= sym
3558 && sym
->ns
== gfc_current_ns
3559 && sym
->attr
.flavor
== FL_PROCEDURE
3560 && sym
->attr
.contained
)
3563 if (csym
->attr
.generic
)
3564 c
->symtree
->n
.sym
= sym
;
3567 csym
= c
->symtree
->n
.sym
;
3571 /* If this ia a deferred TBP, c->expr1 will be set. */
3572 if (!c
->expr1
&& csym
)
3574 if (csym
->attr
.abstract
)
3576 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3577 csym
->name
, &c
->loc
);
3581 /* Subroutines without the RECURSIVE attribution are not allowed to
3583 if (is_illegal_recursion (csym
, gfc_current_ns
))
3585 if (csym
->attr
.entry
&& csym
->ns
->entries
)
3586 gfc_error ("ENTRY %qs at %L cannot be called recursively, "
3587 "as subroutine %qs is not RECURSIVE",
3588 csym
->name
, &c
->loc
, csym
->ns
->entries
->sym
->name
);
3590 gfc_error ("SUBROUTINE %qs at %L cannot be called recursively, "
3591 "as it is not RECURSIVE", csym
->name
, &c
->loc
);
3597 /* Switch off assumed size checking and do this again for certain kinds
3598 of procedure, once the procedure itself is resolved. */
3599 need_full_assumed_size
++;
3602 ptype
= csym
->attr
.proc
;
3604 no_formal_args
= csym
&& is_external_proc (csym
)
3605 && gfc_sym_get_dummy_args (csym
) == NULL
;
3606 if (!resolve_actual_arglist (c
->ext
.actual
, ptype
, no_formal_args
))
3609 /* Resume assumed_size checking. */
3610 need_full_assumed_size
--;
3612 /* If external, check for usage. */
3613 if (csym
&& is_external_proc (csym
))
3614 resolve_global_procedure (csym
, &c
->loc
, &c
->ext
.actual
, 1);
3617 if (c
->resolved_sym
== NULL
)
3619 c
->resolved_isym
= NULL
;
3620 switch (procedure_kind (csym
))
3623 t
= resolve_generic_s (c
);
3626 case PTYPE_SPECIFIC
:
3627 t
= resolve_specific_s (c
);
3631 t
= resolve_unknown_s (c
);
3635 gfc_internal_error ("resolve_subroutine(): bad function type");
3639 /* Some checks of elemental subroutine actual arguments. */
3640 if (!resolve_elemental_actual (NULL
, c
))
3644 update_current_proc_array_outer_dependency (csym
);
3646 /* Typebound procedure: Assume the worst. */
3647 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3653 /* Compare the shapes of two arrays that have non-NULL shapes. If both
3654 op1->shape and op2->shape are non-NULL return true if their shapes
3655 match. If both op1->shape and op2->shape are non-NULL return false
3656 if their shapes do not match. If either op1->shape or op2->shape is
3657 NULL, return true. */
3660 compare_shapes (gfc_expr
*op1
, gfc_expr
*op2
)
3667 if (op1
->shape
!= NULL
&& op2
->shape
!= NULL
)
3669 for (i
= 0; i
< op1
->rank
; i
++)
3671 if (mpz_cmp (op1
->shape
[i
], op2
->shape
[i
]) != 0)
3673 gfc_error ("Shapes for operands at %L and %L are not conformable",
3674 &op1
->where
, &op2
->where
);
3684 /* Convert a logical operator to the corresponding bitwise intrinsic call.
3685 For example A .AND. B becomes IAND(A, B). */
3687 logical_to_bitwise (gfc_expr
*e
)
3689 gfc_expr
*tmp
, *op1
, *op2
;
3691 gfc_actual_arglist
*args
= NULL
;
3693 gcc_assert (e
->expr_type
== EXPR_OP
);
3695 isym
= GFC_ISYM_NONE
;
3696 op1
= e
->value
.op
.op1
;
3697 op2
= e
->value
.op
.op2
;
3699 switch (e
->value
.op
.op
)
3702 isym
= GFC_ISYM_NOT
;
3705 isym
= GFC_ISYM_IAND
;
3708 isym
= GFC_ISYM_IOR
;
3710 case INTRINSIC_NEQV
:
3711 isym
= GFC_ISYM_IEOR
;
3714 /* "Bitwise eqv" is just the complement of NEQV === IEOR.
3715 Change the old expression to NEQV, which will get replaced by IEOR,
3716 and wrap it in NOT. */
3717 tmp
= gfc_copy_expr (e
);
3718 tmp
->value
.op
.op
= INTRINSIC_NEQV
;
3719 tmp
= logical_to_bitwise (tmp
);
3720 isym
= GFC_ISYM_NOT
;
3725 gfc_internal_error ("logical_to_bitwise(): Bad intrinsic");
3728 /* Inherit the original operation's operands as arguments. */
3729 args
= gfc_get_actual_arglist ();
3733 args
->next
= gfc_get_actual_arglist ();
3734 args
->next
->expr
= op2
;
3737 /* Convert the expression to a function call. */
3738 e
->expr_type
= EXPR_FUNCTION
;
3739 e
->value
.function
.actual
= args
;
3740 e
->value
.function
.isym
= gfc_intrinsic_function_by_id (isym
);
3741 e
->value
.function
.name
= e
->value
.function
.isym
->name
;
3742 e
->value
.function
.esym
= NULL
;
3744 /* Make up a pre-resolved function call symtree if we need to. */
3745 if (!e
->symtree
|| !e
->symtree
->n
.sym
)
3748 gfc_get_ha_sym_tree (e
->value
.function
.isym
->name
, &e
->symtree
);
3749 sym
= e
->symtree
->n
.sym
;
3751 sym
->attr
.flavor
= FL_PROCEDURE
;
3752 sym
->attr
.function
= 1;
3753 sym
->attr
.elemental
= 1;
3755 sym
->attr
.referenced
= 1;
3756 gfc_intrinsic_symbol (sym
);
3757 gfc_commit_symbol (sym
);
3760 args
->name
= e
->value
.function
.isym
->formal
->name
;
3761 if (e
->value
.function
.isym
->formal
->next
)
3762 args
->next
->name
= e
->value
.function
.isym
->formal
->next
->name
;
3767 /* Recursively append candidate UOP to CANDIDATES. Store the number of
3768 candidates in CANDIDATES_LEN. */
3770 lookup_uop_fuzzy_find_candidates (gfc_symtree
*uop
,
3772 size_t &candidates_len
)
3779 /* Not sure how to properly filter here. Use all for a start.
3780 n.uop.op is NULL for empty interface operators (is that legal?) disregard
3781 these as i suppose they don't make terribly sense. */
3783 if (uop
->n
.uop
->op
!= NULL
)
3784 vec_push (candidates
, candidates_len
, uop
->name
);
3788 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3792 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3795 /* Lookup user-operator OP fuzzily, taking names in UOP into account. */
3798 lookup_uop_fuzzy (const char *op
, gfc_symtree
*uop
)
3800 char **candidates
= NULL
;
3801 size_t candidates_len
= 0;
3802 lookup_uop_fuzzy_find_candidates (uop
, candidates
, candidates_len
);
3803 return gfc_closest_fuzzy_match (op
, candidates
);
3807 /* Resolve an operator expression node. This can involve replacing the
3808 operation with a user defined function call. */
3811 resolve_operator (gfc_expr
*e
)
3813 gfc_expr
*op1
, *op2
;
3815 bool dual_locus_error
;
3818 /* Resolve all subnodes-- give them types. */
3820 switch (e
->value
.op
.op
)
3823 if (!gfc_resolve_expr (e
->value
.op
.op2
))
3829 case INTRINSIC_UPLUS
:
3830 case INTRINSIC_UMINUS
:
3831 case INTRINSIC_PARENTHESES
:
3832 if (!gfc_resolve_expr (e
->value
.op
.op1
))
3837 /* Typecheck the new node. */
3839 op1
= e
->value
.op
.op1
;
3840 op2
= e
->value
.op
.op2
;
3841 dual_locus_error
= false;
3843 if ((op1
&& op1
->expr_type
== EXPR_NULL
)
3844 || (op2
&& op2
->expr_type
== EXPR_NULL
))
3846 sprintf (msg
, _("Invalid context for NULL() pointer at %%L"));
3850 switch (e
->value
.op
.op
)
3852 case INTRINSIC_UPLUS
:
3853 case INTRINSIC_UMINUS
:
3854 if (op1
->ts
.type
== BT_INTEGER
3855 || op1
->ts
.type
== BT_REAL
3856 || op1
->ts
.type
== BT_COMPLEX
)
3862 sprintf (msg
, _("Operand of unary numeric operator %%<%s%%> at %%L is %s"),
3863 gfc_op2string (e
->value
.op
.op
), gfc_typename (&e
->ts
));
3866 case INTRINSIC_PLUS
:
3867 case INTRINSIC_MINUS
:
3868 case INTRINSIC_TIMES
:
3869 case INTRINSIC_DIVIDE
:
3870 case INTRINSIC_POWER
:
3871 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
3873 gfc_type_convert_binary (e
, 1);
3878 _("Operands of binary numeric operator %%<%s%%> at %%L are %s/%s"),
3879 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
3880 gfc_typename (&op2
->ts
));
3883 case INTRINSIC_CONCAT
:
3884 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
3885 && op1
->ts
.kind
== op2
->ts
.kind
)
3887 e
->ts
.type
= BT_CHARACTER
;
3888 e
->ts
.kind
= op1
->ts
.kind
;
3893 _("Operands of string concatenation operator at %%L are %s/%s"),
3894 gfc_typename (&op1
->ts
), gfc_typename (&op2
->ts
));
3900 case INTRINSIC_NEQV
:
3901 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
3903 e
->ts
.type
= BT_LOGICAL
;
3904 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
3905 if (op1
->ts
.kind
< e
->ts
.kind
)
3906 gfc_convert_type (op1
, &e
->ts
, 2);
3907 else if (op2
->ts
.kind
< e
->ts
.kind
)
3908 gfc_convert_type (op2
, &e
->ts
, 2);
3912 /* Logical ops on integers become bitwise ops with -fdec. */
3914 && (op1
->ts
.type
== BT_INTEGER
|| op2
->ts
.type
== BT_INTEGER
))
3916 e
->ts
.type
= BT_INTEGER
;
3917 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
3918 if (op1
->ts
.type
!= e
->ts
.type
|| op1
->ts
.kind
!= e
->ts
.kind
)
3919 gfc_convert_type (op1
, &e
->ts
, 1);
3920 if (op2
->ts
.type
!= e
->ts
.type
|| op2
->ts
.kind
!= e
->ts
.kind
)
3921 gfc_convert_type (op2
, &e
->ts
, 1);
3922 e
= logical_to_bitwise (e
);
3923 return resolve_function (e
);
3926 sprintf (msg
, _("Operands of logical operator %%<%s%%> at %%L are %s/%s"),
3927 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
3928 gfc_typename (&op2
->ts
));
3933 /* Logical ops on integers become bitwise ops with -fdec. */
3934 if (flag_dec
&& op1
->ts
.type
== BT_INTEGER
)
3936 e
->ts
.type
= BT_INTEGER
;
3937 e
->ts
.kind
= op1
->ts
.kind
;
3938 e
= logical_to_bitwise (e
);
3939 return resolve_function (e
);
3942 if (op1
->ts
.type
== BT_LOGICAL
)
3944 e
->ts
.type
= BT_LOGICAL
;
3945 e
->ts
.kind
= op1
->ts
.kind
;
3949 sprintf (msg
, _("Operand of .not. operator at %%L is %s"),
3950 gfc_typename (&op1
->ts
));
3954 case INTRINSIC_GT_OS
:
3956 case INTRINSIC_GE_OS
:
3958 case INTRINSIC_LT_OS
:
3960 case INTRINSIC_LE_OS
:
3961 if (op1
->ts
.type
== BT_COMPLEX
|| op2
->ts
.type
== BT_COMPLEX
)
3963 strcpy (msg
, _("COMPLEX quantities cannot be compared at %L"));
3970 case INTRINSIC_EQ_OS
:
3972 case INTRINSIC_NE_OS
:
3973 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
3974 && op1
->ts
.kind
== op2
->ts
.kind
)
3976 e
->ts
.type
= BT_LOGICAL
;
3977 e
->ts
.kind
= gfc_default_logical_kind
;
3981 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
3983 gfc_type_convert_binary (e
, 1);
3985 e
->ts
.type
= BT_LOGICAL
;
3986 e
->ts
.kind
= gfc_default_logical_kind
;
3988 if (warn_compare_reals
)
3990 gfc_intrinsic_op op
= e
->value
.op
.op
;
3992 /* Type conversion has made sure that the types of op1 and op2
3993 agree, so it is only necessary to check the first one. */
3994 if ((op1
->ts
.type
== BT_REAL
|| op1
->ts
.type
== BT_COMPLEX
)
3995 && (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
3996 || op
== INTRINSIC_NE
|| op
== INTRINSIC_NE_OS
))
4000 if (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
)
4001 msg
= "Equality comparison for %s at %L";
4003 msg
= "Inequality comparison for %s at %L";
4005 gfc_warning (OPT_Wcompare_reals
, msg
,
4006 gfc_typename (&op1
->ts
), &op1
->where
);
4013 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
4015 _("Logicals at %%L must be compared with %s instead of %s"),
4016 (e
->value
.op
.op
== INTRINSIC_EQ
4017 || e
->value
.op
.op
== INTRINSIC_EQ_OS
)
4018 ? ".eqv." : ".neqv.", gfc_op2string (e
->value
.op
.op
));
4021 _("Operands of comparison operator %%<%s%%> at %%L are %s/%s"),
4022 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
4023 gfc_typename (&op2
->ts
));
4027 case INTRINSIC_USER
:
4028 if (e
->value
.op
.uop
->op
== NULL
)
4030 const char *name
= e
->value
.op
.uop
->name
;
4031 const char *guessed
;
4032 guessed
= lookup_uop_fuzzy (name
, e
->value
.op
.uop
->ns
->uop_root
);
4034 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L; did you mean '%s'?"),
4037 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L"), name
);
4039 else if (op2
== NULL
)
4040 sprintf (msg
, _("Operand of user operator %%<%s%%> at %%L is %s"),
4041 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
));
4044 sprintf (msg
, _("Operands of user operator %%<%s%%> at %%L are %s/%s"),
4045 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
),
4046 gfc_typename (&op2
->ts
));
4047 e
->value
.op
.uop
->op
->sym
->attr
.referenced
= 1;
4052 case INTRINSIC_PARENTHESES
:
4054 if (e
->ts
.type
== BT_CHARACTER
)
4055 e
->ts
.u
.cl
= op1
->ts
.u
.cl
;
4059 gfc_internal_error ("resolve_operator(): Bad intrinsic");
4062 /* Deal with arrayness of an operand through an operator. */
4066 switch (e
->value
.op
.op
)
4068 case INTRINSIC_PLUS
:
4069 case INTRINSIC_MINUS
:
4070 case INTRINSIC_TIMES
:
4071 case INTRINSIC_DIVIDE
:
4072 case INTRINSIC_POWER
:
4073 case INTRINSIC_CONCAT
:
4077 case INTRINSIC_NEQV
:
4079 case INTRINSIC_EQ_OS
:
4081 case INTRINSIC_NE_OS
:
4083 case INTRINSIC_GT_OS
:
4085 case INTRINSIC_GE_OS
:
4087 case INTRINSIC_LT_OS
:
4089 case INTRINSIC_LE_OS
:
4091 if (op1
->rank
== 0 && op2
->rank
== 0)
4094 if (op1
->rank
== 0 && op2
->rank
!= 0)
4096 e
->rank
= op2
->rank
;
4098 if (e
->shape
== NULL
)
4099 e
->shape
= gfc_copy_shape (op2
->shape
, op2
->rank
);
4102 if (op1
->rank
!= 0 && op2
->rank
== 0)
4104 e
->rank
= op1
->rank
;
4106 if (e
->shape
== NULL
)
4107 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4110 if (op1
->rank
!= 0 && op2
->rank
!= 0)
4112 if (op1
->rank
== op2
->rank
)
4114 e
->rank
= op1
->rank
;
4115 if (e
->shape
== NULL
)
4117 t
= compare_shapes (op1
, op2
);
4121 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4126 /* Allow higher level expressions to work. */
4129 /* Try user-defined operators, and otherwise throw an error. */
4130 dual_locus_error
= true;
4132 _("Inconsistent ranks for operator at %%L and %%L"));
4139 case INTRINSIC_PARENTHESES
:
4141 case INTRINSIC_UPLUS
:
4142 case INTRINSIC_UMINUS
:
4143 /* Simply copy arrayness attribute */
4144 e
->rank
= op1
->rank
;
4146 if (e
->shape
== NULL
)
4147 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4155 /* Attempt to simplify the expression. */
4158 t
= gfc_simplify_expr (e
, 0);
4159 /* Some calls do not succeed in simplification and return false
4160 even though there is no error; e.g. variable references to
4161 PARAMETER arrays. */
4162 if (!gfc_is_constant_expr (e
))
4170 match m
= gfc_extend_expr (e
);
4173 if (m
== MATCH_ERROR
)
4177 if (dual_locus_error
)
4178 gfc_error (msg
, &op1
->where
, &op2
->where
);
4180 gfc_error (msg
, &e
->where
);
4186 /************** Array resolution subroutines **************/
4189 { CMP_LT
, CMP_EQ
, CMP_GT
, CMP_UNKNOWN
};
4191 /* Compare two integer expressions. */
4193 static compare_result
4194 compare_bound (gfc_expr
*a
, gfc_expr
*b
)
4198 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
4199 || b
== NULL
|| b
->expr_type
!= EXPR_CONSTANT
)
4202 /* If either of the types isn't INTEGER, we must have
4203 raised an error earlier. */
4205 if (a
->ts
.type
!= BT_INTEGER
|| b
->ts
.type
!= BT_INTEGER
)
4208 i
= mpz_cmp (a
->value
.integer
, b
->value
.integer
);
4218 /* Compare an integer expression with an integer. */
4220 static compare_result
4221 compare_bound_int (gfc_expr
*a
, int b
)
4225 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4228 if (a
->ts
.type
!= BT_INTEGER
)
4229 gfc_internal_error ("compare_bound_int(): Bad expression");
4231 i
= mpz_cmp_si (a
->value
.integer
, b
);
4241 /* Compare an integer expression with a mpz_t. */
4243 static compare_result
4244 compare_bound_mpz_t (gfc_expr
*a
, mpz_t b
)
4248 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4251 if (a
->ts
.type
!= BT_INTEGER
)
4252 gfc_internal_error ("compare_bound_int(): Bad expression");
4254 i
= mpz_cmp (a
->value
.integer
, b
);
4264 /* Compute the last value of a sequence given by a triplet.
4265 Return 0 if it wasn't able to compute the last value, or if the
4266 sequence if empty, and 1 otherwise. */
4269 compute_last_value_for_triplet (gfc_expr
*start
, gfc_expr
*end
,
4270 gfc_expr
*stride
, mpz_t last
)
4274 if (start
== NULL
|| start
->expr_type
!= EXPR_CONSTANT
4275 || end
== NULL
|| end
->expr_type
!= EXPR_CONSTANT
4276 || (stride
!= NULL
&& stride
->expr_type
!= EXPR_CONSTANT
))
4279 if (start
->ts
.type
!= BT_INTEGER
|| end
->ts
.type
!= BT_INTEGER
4280 || (stride
!= NULL
&& stride
->ts
.type
!= BT_INTEGER
))
4283 if (stride
== NULL
|| compare_bound_int (stride
, 1) == CMP_EQ
)
4285 if (compare_bound (start
, end
) == CMP_GT
)
4287 mpz_set (last
, end
->value
.integer
);
4291 if (compare_bound_int (stride
, 0) == CMP_GT
)
4293 /* Stride is positive */
4294 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) > 0)
4299 /* Stride is negative */
4300 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) < 0)
4305 mpz_sub (rem
, end
->value
.integer
, start
->value
.integer
);
4306 mpz_tdiv_r (rem
, rem
, stride
->value
.integer
);
4307 mpz_sub (last
, end
->value
.integer
, rem
);
4314 /* Compare a single dimension of an array reference to the array
4318 check_dimension (int i
, gfc_array_ref
*ar
, gfc_array_spec
*as
)
4322 if (ar
->dimen_type
[i
] == DIMEN_STAR
)
4324 gcc_assert (ar
->stride
[i
] == NULL
);
4325 /* This implies [*] as [*:] and [*:3] are not possible. */
4326 if (ar
->start
[i
] == NULL
)
4328 gcc_assert (ar
->end
[i
] == NULL
);
4333 /* Given start, end and stride values, calculate the minimum and
4334 maximum referenced indexes. */
4336 switch (ar
->dimen_type
[i
])
4339 case DIMEN_THIS_IMAGE
:
4344 if (compare_bound (ar
->start
[i
], as
->lower
[i
]) == CMP_LT
)
4347 gfc_warning (0, "Array reference at %L is out of bounds "
4348 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4349 mpz_get_si (ar
->start
[i
]->value
.integer
),
4350 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4352 gfc_warning (0, "Array reference at %L is out of bounds "
4353 "(%ld < %ld) in codimension %d", &ar
->c_where
[i
],
4354 mpz_get_si (ar
->start
[i
]->value
.integer
),
4355 mpz_get_si (as
->lower
[i
]->value
.integer
),
4359 if (compare_bound (ar
->start
[i
], as
->upper
[i
]) == CMP_GT
)
4362 gfc_warning (0, "Array reference at %L is out of bounds "
4363 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4364 mpz_get_si (ar
->start
[i
]->value
.integer
),
4365 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4367 gfc_warning (0, "Array reference at %L is out of bounds "
4368 "(%ld > %ld) in codimension %d", &ar
->c_where
[i
],
4369 mpz_get_si (ar
->start
[i
]->value
.integer
),
4370 mpz_get_si (as
->upper
[i
]->value
.integer
),
4379 #define AR_START (ar->start[i] ? ar->start[i] : as->lower[i])
4380 #define AR_END (ar->end[i] ? ar->end[i] : as->upper[i])
4382 compare_result comp_start_end
= compare_bound (AR_START
, AR_END
);
4384 /* Check for zero stride, which is not allowed. */
4385 if (compare_bound_int (ar
->stride
[i
], 0) == CMP_EQ
)
4387 gfc_error ("Illegal stride of zero at %L", &ar
->c_where
[i
]);
4391 /* if start == len || (stride > 0 && start < len)
4392 || (stride < 0 && start > len),
4393 then the array section contains at least one element. In this
4394 case, there is an out-of-bounds access if
4395 (start < lower || start > upper). */
4396 if (compare_bound (AR_START
, AR_END
) == CMP_EQ
4397 || ((compare_bound_int (ar
->stride
[i
], 0) == CMP_GT
4398 || ar
->stride
[i
] == NULL
) && comp_start_end
== CMP_LT
)
4399 || (compare_bound_int (ar
->stride
[i
], 0) == CMP_LT
4400 && comp_start_end
== CMP_GT
))
4402 if (compare_bound (AR_START
, as
->lower
[i
]) == CMP_LT
)
4404 gfc_warning (0, "Lower array reference at %L is out of bounds "
4405 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4406 mpz_get_si (AR_START
->value
.integer
),
4407 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4410 if (compare_bound (AR_START
, as
->upper
[i
]) == CMP_GT
)
4412 gfc_warning (0, "Lower array reference at %L is out of bounds "
4413 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4414 mpz_get_si (AR_START
->value
.integer
),
4415 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4420 /* If we can compute the highest index of the array section,
4421 then it also has to be between lower and upper. */
4422 mpz_init (last_value
);
4423 if (compute_last_value_for_triplet (AR_START
, AR_END
, ar
->stride
[i
],
4426 if (compare_bound_mpz_t (as
->lower
[i
], last_value
) == CMP_GT
)
4428 gfc_warning (0, "Upper array reference at %L is out of bounds "
4429 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4430 mpz_get_si (last_value
),
4431 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4432 mpz_clear (last_value
);
4435 if (compare_bound_mpz_t (as
->upper
[i
], last_value
) == CMP_LT
)
4437 gfc_warning (0, "Upper array reference at %L is out of bounds "
4438 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4439 mpz_get_si (last_value
),
4440 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4441 mpz_clear (last_value
);
4445 mpz_clear (last_value
);
4453 gfc_internal_error ("check_dimension(): Bad array reference");
4460 /* Compare an array reference with an array specification. */
4463 compare_spec_to_ref (gfc_array_ref
*ar
)
4470 /* TODO: Full array sections are only allowed as actual parameters. */
4471 if (as
->type
== AS_ASSUMED_SIZE
4472 && (/*ar->type == AR_FULL
4473 ||*/ (ar
->type
== AR_SECTION
4474 && ar
->dimen_type
[i
] == DIMEN_RANGE
&& ar
->end
[i
] == NULL
)))
4476 gfc_error ("Rightmost upper bound of assumed size array section "
4477 "not specified at %L", &ar
->where
);
4481 if (ar
->type
== AR_FULL
)
4484 if (as
->rank
!= ar
->dimen
)
4486 gfc_error ("Rank mismatch in array reference at %L (%d/%d)",
4487 &ar
->where
, ar
->dimen
, as
->rank
);
4491 /* ar->codimen == 0 is a local array. */
4492 if (as
->corank
!= ar
->codimen
&& ar
->codimen
!= 0)
4494 gfc_error ("Coindex rank mismatch in array reference at %L (%d/%d)",
4495 &ar
->where
, ar
->codimen
, as
->corank
);
4499 for (i
= 0; i
< as
->rank
; i
++)
4500 if (!check_dimension (i
, ar
, as
))
4503 /* Local access has no coarray spec. */
4504 if (ar
->codimen
!= 0)
4505 for (i
= as
->rank
; i
< as
->rank
+ as
->corank
; i
++)
4507 if (ar
->dimen_type
[i
] != DIMEN_ELEMENT
&& !ar
->in_allocate
4508 && ar
->dimen_type
[i
] != DIMEN_THIS_IMAGE
)
4510 gfc_error ("Coindex of codimension %d must be a scalar at %L",
4511 i
+ 1 - as
->rank
, &ar
->where
);
4514 if (!check_dimension (i
, ar
, as
))
4522 /* Resolve one part of an array index. */
4525 gfc_resolve_index_1 (gfc_expr
*index
, int check_scalar
,
4526 int force_index_integer_kind
)
4533 if (!gfc_resolve_expr (index
))
4536 if (check_scalar
&& index
->rank
!= 0)
4538 gfc_error ("Array index at %L must be scalar", &index
->where
);
4542 if (index
->ts
.type
!= BT_INTEGER
&& index
->ts
.type
!= BT_REAL
)
4544 gfc_error ("Array index at %L must be of INTEGER type, found %s",
4545 &index
->where
, gfc_basic_typename (index
->ts
.type
));
4549 if (index
->ts
.type
== BT_REAL
)
4550 if (!gfc_notify_std (GFC_STD_LEGACY
, "REAL array index at %L",
4554 if ((index
->ts
.kind
!= gfc_index_integer_kind
4555 && force_index_integer_kind
)
4556 || index
->ts
.type
!= BT_INTEGER
)
4559 ts
.type
= BT_INTEGER
;
4560 ts
.kind
= gfc_index_integer_kind
;
4562 gfc_convert_type_warn (index
, &ts
, 2, 0);
4568 /* Resolve one part of an array index. */
4571 gfc_resolve_index (gfc_expr
*index
, int check_scalar
)
4573 return gfc_resolve_index_1 (index
, check_scalar
, 1);
4576 /* Resolve a dim argument to an intrinsic function. */
4579 gfc_resolve_dim_arg (gfc_expr
*dim
)
4584 if (!gfc_resolve_expr (dim
))
4589 gfc_error ("Argument dim at %L must be scalar", &dim
->where
);
4594 if (dim
->ts
.type
!= BT_INTEGER
)
4596 gfc_error ("Argument dim at %L must be of INTEGER type", &dim
->where
);
4600 if (dim
->ts
.kind
!= gfc_index_integer_kind
)
4605 ts
.type
= BT_INTEGER
;
4606 ts
.kind
= gfc_index_integer_kind
;
4608 gfc_convert_type_warn (dim
, &ts
, 2, 0);
4614 /* Given an expression that contains array references, update those array
4615 references to point to the right array specifications. While this is
4616 filled in during matching, this information is difficult to save and load
4617 in a module, so we take care of it here.
4619 The idea here is that the original array reference comes from the
4620 base symbol. We traverse the list of reference structures, setting
4621 the stored reference to references. Component references can
4622 provide an additional array specification. */
4625 find_array_spec (gfc_expr
*e
)
4631 if (e
->symtree
->n
.sym
->ts
.type
== BT_CLASS
)
4632 as
= CLASS_DATA (e
->symtree
->n
.sym
)->as
;
4634 as
= e
->symtree
->n
.sym
->as
;
4636 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4641 gfc_internal_error ("find_array_spec(): Missing spec");
4648 c
= ref
->u
.c
.component
;
4649 if (c
->attr
.dimension
)
4652 gfc_internal_error ("find_array_spec(): unused as(1)");
4663 gfc_internal_error ("find_array_spec(): unused as(2)");
4667 /* Resolve an array reference. */
4670 resolve_array_ref (gfc_array_ref
*ar
)
4672 int i
, check_scalar
;
4675 for (i
= 0; i
< ar
->dimen
+ ar
->codimen
; i
++)
4677 check_scalar
= ar
->dimen_type
[i
] == DIMEN_RANGE
;
4679 /* Do not force gfc_index_integer_kind for the start. We can
4680 do fine with any integer kind. This avoids temporary arrays
4681 created for indexing with a vector. */
4682 if (!gfc_resolve_index_1 (ar
->start
[i
], check_scalar
, 0))
4684 if (!gfc_resolve_index (ar
->end
[i
], check_scalar
))
4686 if (!gfc_resolve_index (ar
->stride
[i
], check_scalar
))
4691 if (ar
->dimen_type
[i
] == DIMEN_UNKNOWN
)
4695 ar
->dimen_type
[i
] = DIMEN_ELEMENT
;
4699 ar
->dimen_type
[i
] = DIMEN_VECTOR
;
4700 if (e
->expr_type
== EXPR_VARIABLE
4701 && e
->symtree
->n
.sym
->ts
.type
== BT_DERIVED
)
4702 ar
->start
[i
] = gfc_get_parentheses (e
);
4706 gfc_error ("Array index at %L is an array of rank %d",
4707 &ar
->c_where
[i
], e
->rank
);
4711 /* Fill in the upper bound, which may be lower than the
4712 specified one for something like a(2:10:5), which is
4713 identical to a(2:7:5). Only relevant for strides not equal
4714 to one. Don't try a division by zero. */
4715 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4716 && ar
->stride
[i
] != NULL
&& ar
->stride
[i
]->expr_type
== EXPR_CONSTANT
4717 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 1L) != 0
4718 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 0L) != 0)
4722 if (gfc_ref_dimen_size (ar
, i
, &size
, &end
))
4724 if (ar
->end
[i
] == NULL
)
4727 gfc_get_constant_expr (BT_INTEGER
, gfc_index_integer_kind
,
4729 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4731 else if (ar
->end
[i
]->ts
.type
== BT_INTEGER
4732 && ar
->end
[i
]->expr_type
== EXPR_CONSTANT
)
4734 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4745 if (ar
->type
== AR_FULL
)
4747 if (ar
->as
->rank
== 0)
4748 ar
->type
= AR_ELEMENT
;
4750 /* Make sure array is the same as array(:,:), this way
4751 we don't need to special case all the time. */
4752 ar
->dimen
= ar
->as
->rank
;
4753 for (i
= 0; i
< ar
->dimen
; i
++)
4755 ar
->dimen_type
[i
] = DIMEN_RANGE
;
4757 gcc_assert (ar
->start
[i
] == NULL
);
4758 gcc_assert (ar
->end
[i
] == NULL
);
4759 gcc_assert (ar
->stride
[i
] == NULL
);
4763 /* If the reference type is unknown, figure out what kind it is. */
4765 if (ar
->type
== AR_UNKNOWN
)
4767 ar
->type
= AR_ELEMENT
;
4768 for (i
= 0; i
< ar
->dimen
; i
++)
4769 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4770 || ar
->dimen_type
[i
] == DIMEN_VECTOR
)
4772 ar
->type
= AR_SECTION
;
4777 if (!ar
->as
->cray_pointee
&& !compare_spec_to_ref (ar
))
4780 if (ar
->as
->corank
&& ar
->codimen
== 0)
4783 ar
->codimen
= ar
->as
->corank
;
4784 for (n
= ar
->dimen
; n
< ar
->dimen
+ ar
->codimen
; n
++)
4785 ar
->dimen_type
[n
] = DIMEN_THIS_IMAGE
;
4793 resolve_substring (gfc_ref
*ref
)
4795 int k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
4797 if (ref
->u
.ss
.start
!= NULL
)
4799 if (!gfc_resolve_expr (ref
->u
.ss
.start
))
4802 if (ref
->u
.ss
.start
->ts
.type
!= BT_INTEGER
)
4804 gfc_error ("Substring start index at %L must be of type INTEGER",
4805 &ref
->u
.ss
.start
->where
);
4809 if (ref
->u
.ss
.start
->rank
!= 0)
4811 gfc_error ("Substring start index at %L must be scalar",
4812 &ref
->u
.ss
.start
->where
);
4816 if (compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_LT
4817 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4818 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4820 gfc_error ("Substring start index at %L is less than one",
4821 &ref
->u
.ss
.start
->where
);
4826 if (ref
->u
.ss
.end
!= NULL
)
4828 if (!gfc_resolve_expr (ref
->u
.ss
.end
))
4831 if (ref
->u
.ss
.end
->ts
.type
!= BT_INTEGER
)
4833 gfc_error ("Substring end index at %L must be of type INTEGER",
4834 &ref
->u
.ss
.end
->where
);
4838 if (ref
->u
.ss
.end
->rank
!= 0)
4840 gfc_error ("Substring end index at %L must be scalar",
4841 &ref
->u
.ss
.end
->where
);
4845 if (ref
->u
.ss
.length
!= NULL
4846 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_GT
4847 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4848 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4850 gfc_error ("Substring end index at %L exceeds the string length",
4851 &ref
->u
.ss
.start
->where
);
4855 if (compare_bound_mpz_t (ref
->u
.ss
.end
,
4856 gfc_integer_kinds
[k
].huge
) == CMP_GT
4857 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4858 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4860 gfc_error ("Substring end index at %L is too large",
4861 &ref
->u
.ss
.end
->where
);
4870 /* This function supplies missing substring charlens. */
4873 gfc_resolve_substring_charlen (gfc_expr
*e
)
4876 gfc_expr
*start
, *end
;
4877 gfc_typespec
*ts
= NULL
;
4879 for (char_ref
= e
->ref
; char_ref
; char_ref
= char_ref
->next
)
4881 if (char_ref
->type
== REF_SUBSTRING
)
4883 if (char_ref
->type
== REF_COMPONENT
)
4884 ts
= &char_ref
->u
.c
.component
->ts
;
4890 gcc_assert (char_ref
->next
== NULL
);
4894 if (e
->ts
.u
.cl
->length
)
4895 gfc_free_expr (e
->ts
.u
.cl
->length
);
4896 else if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
->attr
.dummy
)
4900 e
->ts
.type
= BT_CHARACTER
;
4901 e
->ts
.kind
= gfc_default_character_kind
;
4904 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
4906 if (char_ref
->u
.ss
.start
)
4907 start
= gfc_copy_expr (char_ref
->u
.ss
.start
);
4909 start
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 1);
4911 if (char_ref
->u
.ss
.end
)
4912 end
= gfc_copy_expr (char_ref
->u
.ss
.end
);
4913 else if (e
->expr_type
== EXPR_VARIABLE
)
4916 ts
= &e
->symtree
->n
.sym
->ts
;
4917 end
= gfc_copy_expr (ts
->u
.cl
->length
);
4924 gfc_free_expr (start
);
4925 gfc_free_expr (end
);
4929 /* Length = (end - start + 1). */
4930 e
->ts
.u
.cl
->length
= gfc_subtract (end
, start
);
4931 e
->ts
.u
.cl
->length
= gfc_add (e
->ts
.u
.cl
->length
,
4932 gfc_get_int_expr (gfc_charlen_int_kind
,
4935 /* F2008, 6.4.1: Both the starting point and the ending point shall
4936 be within the range 1, 2, ..., n unless the starting point exceeds
4937 the ending point, in which case the substring has length zero. */
4939 if (mpz_cmp_si (e
->ts
.u
.cl
->length
->value
.integer
, 0) < 0)
4940 mpz_set_si (e
->ts
.u
.cl
->length
->value
.integer
, 0);
4942 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
4943 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
4945 /* Make sure that the length is simplified. */
4946 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 1);
4947 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
4951 /* Resolve subtype references. */
4954 resolve_ref (gfc_expr
*expr
)
4956 int current_part_dimension
, n_components
, seen_part_dimension
;
4959 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
4960 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.as
== NULL
)
4962 find_array_spec (expr
);
4966 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
4970 if (!resolve_array_ref (&ref
->u
.ar
))
4978 if (!resolve_substring (ref
))
4983 /* Check constraints on part references. */
4985 current_part_dimension
= 0;
4986 seen_part_dimension
= 0;
4989 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
4994 switch (ref
->u
.ar
.type
)
4997 /* Coarray scalar. */
4998 if (ref
->u
.ar
.as
->rank
== 0)
5000 current_part_dimension
= 0;
5005 current_part_dimension
= 1;
5009 current_part_dimension
= 0;
5013 gfc_internal_error ("resolve_ref(): Bad array reference");
5019 if (current_part_dimension
|| seen_part_dimension
)
5022 if (ref
->u
.c
.component
->attr
.pointer
5023 || ref
->u
.c
.component
->attr
.proc_pointer
5024 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5025 && CLASS_DATA (ref
->u
.c
.component
)->attr
.pointer
))
5027 gfc_error ("Component to the right of a part reference "
5028 "with nonzero rank must not have the POINTER "
5029 "attribute at %L", &expr
->where
);
5032 else if (ref
->u
.c
.component
->attr
.allocatable
5033 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5034 && CLASS_DATA (ref
->u
.c
.component
)->attr
.allocatable
))
5037 gfc_error ("Component to the right of a part reference "
5038 "with nonzero rank must not have the ALLOCATABLE "
5039 "attribute at %L", &expr
->where
);
5051 if (((ref
->type
== REF_COMPONENT
&& n_components
> 1)
5052 || ref
->next
== NULL
)
5053 && current_part_dimension
5054 && seen_part_dimension
)
5056 gfc_error ("Two or more part references with nonzero rank must "
5057 "not be specified at %L", &expr
->where
);
5061 if (ref
->type
== REF_COMPONENT
)
5063 if (current_part_dimension
)
5064 seen_part_dimension
= 1;
5066 /* reset to make sure */
5067 current_part_dimension
= 0;
5075 /* Given an expression, determine its shape. This is easier than it sounds.
5076 Leaves the shape array NULL if it is not possible to determine the shape. */
5079 expression_shape (gfc_expr
*e
)
5081 mpz_t array
[GFC_MAX_DIMENSIONS
];
5084 if (e
->rank
<= 0 || e
->shape
!= NULL
)
5087 for (i
= 0; i
< e
->rank
; i
++)
5088 if (!gfc_array_dimen_size (e
, i
, &array
[i
]))
5091 e
->shape
= gfc_get_shape (e
->rank
);
5093 memcpy (e
->shape
, array
, e
->rank
* sizeof (mpz_t
));
5098 for (i
--; i
>= 0; i
--)
5099 mpz_clear (array
[i
]);
5103 /* Given a variable expression node, compute the rank of the expression by
5104 examining the base symbol and any reference structures it may have. */
5107 expression_rank (gfc_expr
*e
)
5112 /* Just to make sure, because EXPR_COMPCALL's also have an e->ref and that
5113 could lead to serious confusion... */
5114 gcc_assert (e
->expr_type
!= EXPR_COMPCALL
);
5118 if (e
->expr_type
== EXPR_ARRAY
)
5120 /* Constructors can have a rank different from one via RESHAPE(). */
5122 if (e
->symtree
== NULL
)
5128 e
->rank
= (e
->symtree
->n
.sym
->as
== NULL
)
5129 ? 0 : e
->symtree
->n
.sym
->as
->rank
;
5135 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5137 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.proc_pointer
5138 && ref
->u
.c
.component
->attr
.function
&& !ref
->next
)
5139 rank
= ref
->u
.c
.component
->as
? ref
->u
.c
.component
->as
->rank
: 0;
5141 if (ref
->type
!= REF_ARRAY
)
5144 if (ref
->u
.ar
.type
== AR_FULL
)
5146 rank
= ref
->u
.ar
.as
->rank
;
5150 if (ref
->u
.ar
.type
== AR_SECTION
)
5152 /* Figure out the rank of the section. */
5154 gfc_internal_error ("expression_rank(): Two array specs");
5156 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
5157 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_RANGE
5158 || ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
)
5168 expression_shape (e
);
5173 add_caf_get_intrinsic (gfc_expr
*e
)
5175 gfc_expr
*wrapper
, *tmp_expr
;
5179 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5180 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5185 for (n
= ref
->u
.ar
.dimen
; n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
5186 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_ELEMENT
)
5189 tmp_expr
= XCNEW (gfc_expr
);
5191 wrapper
= gfc_build_intrinsic_call (gfc_current_ns
, GFC_ISYM_CAF_GET
,
5192 "caf_get", tmp_expr
->where
, 1, tmp_expr
);
5193 wrapper
->ts
= e
->ts
;
5194 wrapper
->rank
= e
->rank
;
5196 wrapper
->shape
= gfc_copy_shape (e
->shape
, e
->rank
);
5203 remove_caf_get_intrinsic (gfc_expr
*e
)
5205 gcc_assert (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
5206 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
);
5207 gfc_expr
*e2
= e
->value
.function
.actual
->expr
;
5208 e
->value
.function
.actual
->expr
= NULL
;
5209 gfc_free_actual_arglist (e
->value
.function
.actual
);
5210 gfc_free_shape (&e
->shape
, e
->rank
);
5216 /* Resolve a variable expression. */
5219 resolve_variable (gfc_expr
*e
)
5226 if (e
->symtree
== NULL
)
5228 sym
= e
->symtree
->n
.sym
;
5230 /* Use same check as for TYPE(*) below; this check has to be before TYPE(*)
5231 as ts.type is set to BT_ASSUMED in resolve_symbol. */
5232 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
5234 if (!actual_arg
|| inquiry_argument
)
5236 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may only "
5237 "be used as actual argument", sym
->name
, &e
->where
);
5241 /* TS 29113, 407b. */
5242 else if (e
->ts
.type
== BT_ASSUMED
)
5246 gfc_error ("Assumed-type variable %s at %L may only be used "
5247 "as actual argument", sym
->name
, &e
->where
);
5250 else if (inquiry_argument
&& !first_actual_arg
)
5252 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5253 for all inquiry functions in resolve_function; the reason is
5254 that the function-name resolution happens too late in that
5256 gfc_error ("Assumed-type variable %s at %L as actual argument to "
5257 "an inquiry function shall be the first argument",
5258 sym
->name
, &e
->where
);
5262 /* TS 29113, C535b. */
5263 else if ((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5264 && CLASS_DATA (sym
)->as
5265 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5266 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5267 && sym
->as
->type
== AS_ASSUMED_RANK
))
5271 gfc_error ("Assumed-rank variable %s at %L may only be used as "
5272 "actual argument", sym
->name
, &e
->where
);
5275 else if (inquiry_argument
&& !first_actual_arg
)
5277 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5278 for all inquiry functions in resolve_function; the reason is
5279 that the function-name resolution happens too late in that
5281 gfc_error ("Assumed-rank variable %s at %L as actual argument "
5282 "to an inquiry function shall be the first argument",
5283 sym
->name
, &e
->where
);
5288 if ((sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
)) && e
->ref
5289 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5290 && e
->ref
->next
== NULL
))
5292 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall not have "
5293 "a subobject reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5296 /* TS 29113, 407b. */
5297 else if (e
->ts
.type
== BT_ASSUMED
&& e
->ref
5298 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5299 && e
->ref
->next
== NULL
))
5301 gfc_error ("Assumed-type variable %s at %L shall not have a subobject "
5302 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5306 /* TS 29113, C535b. */
5307 if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5308 && CLASS_DATA (sym
)->as
5309 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5310 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5311 && sym
->as
->type
== AS_ASSUMED_RANK
))
5313 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5314 && e
->ref
->next
== NULL
))
5316 gfc_error ("Assumed-rank variable %s at %L shall not have a subobject "
5317 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5321 /* For variables that are used in an associate (target => object) where
5322 the object's basetype is array valued while the target is scalar,
5323 the ts' type of the component refs is still array valued, which
5324 can't be translated that way. */
5325 if (sym
->assoc
&& e
->rank
== 0 && e
->ref
&& sym
->ts
.type
== BT_CLASS
5326 && sym
->assoc
->target
->ts
.type
== BT_CLASS
5327 && CLASS_DATA (sym
->assoc
->target
)->as
)
5329 gfc_ref
*ref
= e
->ref
;
5335 ref
->u
.c
.sym
= sym
->ts
.u
.derived
;
5336 /* Stop the loop. */
5346 /* If this is an associate-name, it may be parsed with an array reference
5347 in error even though the target is scalar. Fail directly in this case.
5348 TODO Understand why class scalar expressions must be excluded. */
5349 if (sym
->assoc
&& !(sym
->ts
.type
== BT_CLASS
&& e
->rank
== 0))
5351 if (sym
->ts
.type
== BT_CLASS
)
5352 gfc_fix_class_refs (e
);
5353 if (!sym
->attr
.dimension
&& e
->ref
&& e
->ref
->type
== REF_ARRAY
)
5357 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.generic
)
5358 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
5360 /* On the other hand, the parser may not have known this is an array;
5361 in this case, we have to add a FULL reference. */
5362 if (sym
->assoc
&& sym
->attr
.dimension
&& !e
->ref
)
5364 e
->ref
= gfc_get_ref ();
5365 e
->ref
->type
= REF_ARRAY
;
5366 e
->ref
->u
.ar
.type
= AR_FULL
;
5367 e
->ref
->u
.ar
.dimen
= 0;
5370 /* Like above, but for class types, where the checking whether an array
5371 ref is present is more complicated. Furthermore make sure not to add
5372 the full array ref to _vptr or _len refs. */
5373 if (sym
->assoc
&& sym
->ts
.type
== BT_CLASS
5374 && CLASS_DATA (sym
)->attr
.dimension
5375 && (e
->ts
.type
!= BT_DERIVED
|| !e
->ts
.u
.derived
->attr
.vtype
))
5377 gfc_ref
*ref
, *newref
;
5379 newref
= gfc_get_ref ();
5380 newref
->type
= REF_ARRAY
;
5381 newref
->u
.ar
.type
= AR_FULL
;
5382 newref
->u
.ar
.dimen
= 0;
5383 /* Because this is an associate var and the first ref either is a ref to
5384 the _data component or not, no traversal of the ref chain is
5385 needed. The array ref needs to be inserted after the _data ref,
5386 or when that is not present, which may happend for polymorphic
5387 types, then at the first position. */
5391 else if (ref
->type
== REF_COMPONENT
5392 && strcmp ("_data", ref
->u
.c
.component
->name
) == 0)
5394 if (!ref
->next
|| ref
->next
->type
!= REF_ARRAY
)
5396 newref
->next
= ref
->next
;
5400 /* Array ref present already. */
5401 gfc_free_ref_list (newref
);
5403 else if (ref
->type
== REF_ARRAY
)
5404 /* Array ref present already. */
5405 gfc_free_ref_list (newref
);
5413 if (e
->ref
&& !resolve_ref (e
))
5416 if (sym
->attr
.flavor
== FL_PROCEDURE
5417 && (!sym
->attr
.function
5418 || (sym
->attr
.function
&& sym
->result
5419 && sym
->result
->attr
.proc_pointer
5420 && !sym
->result
->attr
.function
)))
5422 e
->ts
.type
= BT_PROCEDURE
;
5423 goto resolve_procedure
;
5426 if (sym
->ts
.type
!= BT_UNKNOWN
)
5427 gfc_variable_attr (e
, &e
->ts
);
5428 else if (sym
->attr
.flavor
== FL_PROCEDURE
5429 && sym
->attr
.function
&& sym
->result
5430 && sym
->result
->ts
.type
!= BT_UNKNOWN
5431 && sym
->result
->attr
.proc_pointer
)
5432 e
->ts
= sym
->result
->ts
;
5435 /* Must be a simple variable reference. */
5436 if (!gfc_set_default_type (sym
, 1, sym
->ns
))
5441 if (check_assumed_size_reference (sym
, e
))
5444 /* Deal with forward references to entries during gfc_resolve_code, to
5445 satisfy, at least partially, 12.5.2.5. */
5446 if (gfc_current_ns
->entries
5447 && current_entry_id
== sym
->entry_id
5450 && cs_base
->current
->op
!= EXEC_ENTRY
)
5452 gfc_entry_list
*entry
;
5453 gfc_formal_arglist
*formal
;
5455 bool seen
, saved_specification_expr
;
5457 /* If the symbol is a dummy... */
5458 if (sym
->attr
.dummy
&& sym
->ns
== gfc_current_ns
)
5460 entry
= gfc_current_ns
->entries
;
5463 /* ...test if the symbol is a parameter of previous entries. */
5464 for (; entry
&& entry
->id
<= current_entry_id
; entry
= entry
->next
)
5465 for (formal
= entry
->sym
->formal
; formal
; formal
= formal
->next
)
5467 if (formal
->sym
&& sym
->name
== formal
->sym
->name
)
5474 /* If it has not been seen as a dummy, this is an error. */
5477 if (specification_expr
)
5478 gfc_error ("Variable %qs, used in a specification expression"
5479 ", is referenced at %L before the ENTRY statement "
5480 "in which it is a parameter",
5481 sym
->name
, &cs_base
->current
->loc
);
5483 gfc_error ("Variable %qs is used at %L before the ENTRY "
5484 "statement in which it is a parameter",
5485 sym
->name
, &cs_base
->current
->loc
);
5490 /* Now do the same check on the specification expressions. */
5491 saved_specification_expr
= specification_expr
;
5492 specification_expr
= true;
5493 if (sym
->ts
.type
== BT_CHARACTER
5494 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
5498 for (n
= 0; n
< sym
->as
->rank
; n
++)
5500 if (!gfc_resolve_expr (sym
->as
->lower
[n
]))
5502 if (!gfc_resolve_expr (sym
->as
->upper
[n
]))
5505 specification_expr
= saved_specification_expr
;
5508 /* Update the symbol's entry level. */
5509 sym
->entry_id
= current_entry_id
+ 1;
5512 /* If a symbol has been host_associated mark it. This is used latter,
5513 to identify if aliasing is possible via host association. */
5514 if (sym
->attr
.flavor
== FL_VARIABLE
5515 && gfc_current_ns
->parent
5516 && (gfc_current_ns
->parent
== sym
->ns
5517 || (gfc_current_ns
->parent
->parent
5518 && gfc_current_ns
->parent
->parent
== sym
->ns
)))
5519 sym
->attr
.host_assoc
= 1;
5521 if (gfc_current_ns
->proc_name
5522 && sym
->attr
.dimension
5523 && (sym
->ns
!= gfc_current_ns
5524 || sym
->attr
.use_assoc
5525 || sym
->attr
.in_common
))
5526 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
5529 if (t
&& !resolve_procedure_expression (e
))
5532 /* F2008, C617 and C1229. */
5533 if (!inquiry_argument
&& (e
->ts
.type
== BT_CLASS
|| e
->ts
.type
== BT_DERIVED
)
5534 && gfc_is_coindexed (e
))
5536 gfc_ref
*ref
, *ref2
= NULL
;
5538 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5540 if (ref
->type
== REF_COMPONENT
)
5542 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5546 for ( ; ref
; ref
= ref
->next
)
5547 if (ref
->type
== REF_COMPONENT
)
5550 /* Expression itself is not coindexed object. */
5551 if (ref
&& e
->ts
.type
== BT_CLASS
)
5553 gfc_error ("Polymorphic subobject of coindexed object at %L",
5558 /* Expression itself is coindexed object. */
5562 c
= ref2
? ref2
->u
.c
.component
: e
->symtree
->n
.sym
->components
;
5563 for ( ; c
; c
= c
->next
)
5564 if (c
->attr
.allocatable
&& c
->ts
.type
== BT_CLASS
)
5566 gfc_error ("Coindexed object with polymorphic allocatable "
5567 "subcomponent at %L", &e
->where
);
5575 expression_rank (e
);
5577 if (t
&& flag_coarray
== GFC_FCOARRAY_LIB
&& gfc_is_coindexed (e
))
5578 add_caf_get_intrinsic (e
);
5584 /* Checks to see that the correct symbol has been host associated.
5585 The only situation where this arises is that in which a twice
5586 contained function is parsed after the host association is made.
5587 Therefore, on detecting this, change the symbol in the expression
5588 and convert the array reference into an actual arglist if the old
5589 symbol is a variable. */
5591 check_host_association (gfc_expr
*e
)
5593 gfc_symbol
*sym
, *old_sym
;
5597 gfc_actual_arglist
*arg
, *tail
= NULL
;
5598 bool retval
= e
->expr_type
== EXPR_FUNCTION
;
5600 /* If the expression is the result of substitution in
5601 interface.c(gfc_extend_expr) because there is no way in
5602 which the host association can be wrong. */
5603 if (e
->symtree
== NULL
5604 || e
->symtree
->n
.sym
== NULL
5605 || e
->user_operator
)
5608 old_sym
= e
->symtree
->n
.sym
;
5610 if (gfc_current_ns
->parent
5611 && old_sym
->ns
!= gfc_current_ns
)
5613 /* Use the 'USE' name so that renamed module symbols are
5614 correctly handled. */
5615 gfc_find_symbol (e
->symtree
->name
, gfc_current_ns
, 1, &sym
);
5617 if (sym
&& old_sym
!= sym
5618 && sym
->ts
.type
== old_sym
->ts
.type
5619 && sym
->attr
.flavor
== FL_PROCEDURE
5620 && sym
->attr
.contained
)
5622 /* Clear the shape, since it might not be valid. */
5623 gfc_free_shape (&e
->shape
, e
->rank
);
5625 /* Give the expression the right symtree! */
5626 gfc_find_sym_tree (e
->symtree
->name
, NULL
, 1, &st
);
5627 gcc_assert (st
!= NULL
);
5629 if (old_sym
->attr
.flavor
== FL_PROCEDURE
5630 || e
->expr_type
== EXPR_FUNCTION
)
5632 /* Original was function so point to the new symbol, since
5633 the actual argument list is already attached to the
5635 e
->value
.function
.esym
= NULL
;
5640 /* Original was variable so convert array references into
5641 an actual arglist. This does not need any checking now
5642 since resolve_function will take care of it. */
5643 e
->value
.function
.actual
= NULL
;
5644 e
->expr_type
= EXPR_FUNCTION
;
5647 /* Ambiguity will not arise if the array reference is not
5648 the last reference. */
5649 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5650 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
5653 gcc_assert (ref
->type
== REF_ARRAY
);
5655 /* Grab the start expressions from the array ref and
5656 copy them into actual arguments. */
5657 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
5659 arg
= gfc_get_actual_arglist ();
5660 arg
->expr
= gfc_copy_expr (ref
->u
.ar
.start
[n
]);
5661 if (e
->value
.function
.actual
== NULL
)
5662 tail
= e
->value
.function
.actual
= arg
;
5670 /* Dump the reference list and set the rank. */
5671 gfc_free_ref_list (e
->ref
);
5673 e
->rank
= sym
->as
? sym
->as
->rank
: 0;
5676 gfc_resolve_expr (e
);
5680 /* This might have changed! */
5681 return e
->expr_type
== EXPR_FUNCTION
;
5686 gfc_resolve_character_operator (gfc_expr
*e
)
5688 gfc_expr
*op1
= e
->value
.op
.op1
;
5689 gfc_expr
*op2
= e
->value
.op
.op2
;
5690 gfc_expr
*e1
= NULL
;
5691 gfc_expr
*e2
= NULL
;
5693 gcc_assert (e
->value
.op
.op
== INTRINSIC_CONCAT
);
5695 if (op1
->ts
.u
.cl
&& op1
->ts
.u
.cl
->length
)
5696 e1
= gfc_copy_expr (op1
->ts
.u
.cl
->length
);
5697 else if (op1
->expr_type
== EXPR_CONSTANT
)
5698 e1
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5699 op1
->value
.character
.length
);
5701 if (op2
->ts
.u
.cl
&& op2
->ts
.u
.cl
->length
)
5702 e2
= gfc_copy_expr (op2
->ts
.u
.cl
->length
);
5703 else if (op2
->expr_type
== EXPR_CONSTANT
)
5704 e2
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5705 op2
->value
.character
.length
);
5707 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5717 e
->ts
.u
.cl
->length
= gfc_add (e1
, e2
);
5718 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5719 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5720 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 0);
5721 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5727 /* Ensure that an character expression has a charlen and, if possible, a
5728 length expression. */
5731 fixup_charlen (gfc_expr
*e
)
5733 /* The cases fall through so that changes in expression type and the need
5734 for multiple fixes are picked up. In all circumstances, a charlen should
5735 be available for the middle end to hang a backend_decl on. */
5736 switch (e
->expr_type
)
5739 gfc_resolve_character_operator (e
);
5743 if (e
->expr_type
== EXPR_ARRAY
)
5744 gfc_resolve_character_array_constructor (e
);
5747 case EXPR_SUBSTRING
:
5748 if (!e
->ts
.u
.cl
&& e
->ref
)
5749 gfc_resolve_substring_charlen (e
);
5754 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5761 /* Update an actual argument to include the passed-object for type-bound
5762 procedures at the right position. */
5764 static gfc_actual_arglist
*
5765 update_arglist_pass (gfc_actual_arglist
* lst
, gfc_expr
* po
, unsigned argpos
,
5768 gcc_assert (argpos
> 0);
5772 gfc_actual_arglist
* result
;
5774 result
= gfc_get_actual_arglist ();
5778 result
->name
= name
;
5784 lst
->next
= update_arglist_pass (lst
->next
, po
, argpos
- 1, name
);
5786 lst
= update_arglist_pass (NULL
, po
, argpos
- 1, name
);
5791 /* Extract the passed-object from an EXPR_COMPCALL (a copy of it). */
5794 extract_compcall_passed_object (gfc_expr
* e
)
5798 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
5800 if (e
->value
.compcall
.base_object
)
5801 po
= gfc_copy_expr (e
->value
.compcall
.base_object
);
5804 po
= gfc_get_expr ();
5805 po
->expr_type
= EXPR_VARIABLE
;
5806 po
->symtree
= e
->symtree
;
5807 po
->ref
= gfc_copy_ref (e
->ref
);
5808 po
->where
= e
->where
;
5811 if (!gfc_resolve_expr (po
))
5818 /* Update the arglist of an EXPR_COMPCALL expression to include the
5822 update_compcall_arglist (gfc_expr
* e
)
5825 gfc_typebound_proc
* tbp
;
5827 tbp
= e
->value
.compcall
.tbp
;
5832 po
= extract_compcall_passed_object (e
);
5836 if (tbp
->nopass
|| e
->value
.compcall
.ignore_pass
)
5842 if (tbp
->pass_arg_num
<= 0)
5845 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
5853 /* Extract the passed object from a PPC call (a copy of it). */
5856 extract_ppc_passed_object (gfc_expr
*e
)
5861 po
= gfc_get_expr ();
5862 po
->expr_type
= EXPR_VARIABLE
;
5863 po
->symtree
= e
->symtree
;
5864 po
->ref
= gfc_copy_ref (e
->ref
);
5865 po
->where
= e
->where
;
5867 /* Remove PPC reference. */
5869 while ((*ref
)->next
)
5870 ref
= &(*ref
)->next
;
5871 gfc_free_ref_list (*ref
);
5874 if (!gfc_resolve_expr (po
))
5881 /* Update the actual arglist of a procedure pointer component to include the
5885 update_ppc_arglist (gfc_expr
* e
)
5889 gfc_typebound_proc
* tb
;
5891 ppc
= gfc_get_proc_ptr_comp (e
);
5899 else if (tb
->nopass
)
5902 po
= extract_ppc_passed_object (e
);
5909 gfc_error ("Passed-object at %L must be scalar", &e
->where
);
5914 if (po
->ts
.type
== BT_DERIVED
&& po
->ts
.u
.derived
->attr
.abstract
)
5916 gfc_error ("Base object for procedure-pointer component call at %L is of"
5917 " ABSTRACT type %qs", &e
->where
, po
->ts
.u
.derived
->name
);
5921 gcc_assert (tb
->pass_arg_num
> 0);
5922 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
5930 /* Check that the object a TBP is called on is valid, i.e. it must not be
5931 of ABSTRACT type (as in subobject%abstract_parent%tbp()). */
5934 check_typebound_baseobject (gfc_expr
* e
)
5937 bool return_value
= false;
5939 base
= extract_compcall_passed_object (e
);
5943 gcc_assert (base
->ts
.type
== BT_DERIVED
|| base
->ts
.type
== BT_CLASS
);
5945 if (base
->ts
.type
== BT_CLASS
&& !gfc_expr_attr (base
).class_ok
)
5949 if (base
->ts
.type
== BT_DERIVED
&& base
->ts
.u
.derived
->attr
.abstract
)
5951 gfc_error ("Base object for type-bound procedure call at %L is of"
5952 " ABSTRACT type %qs", &e
->where
, base
->ts
.u
.derived
->name
);
5956 /* F08:C1230. If the procedure called is NOPASS,
5957 the base object must be scalar. */
5958 if (e
->value
.compcall
.tbp
->nopass
&& base
->rank
!= 0)
5960 gfc_error ("Base object for NOPASS type-bound procedure call at %L must"
5961 " be scalar", &e
->where
);
5965 return_value
= true;
5968 gfc_free_expr (base
);
5969 return return_value
;
5973 /* Resolve a call to a type-bound procedure, either function or subroutine,
5974 statically from the data in an EXPR_COMPCALL expression. The adapted
5975 arglist and the target-procedure symtree are returned. */
5978 resolve_typebound_static (gfc_expr
* e
, gfc_symtree
** target
,
5979 gfc_actual_arglist
** actual
)
5981 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
5982 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
5984 /* Update the actual arglist for PASS. */
5985 if (!update_compcall_arglist (e
))
5988 *actual
= e
->value
.compcall
.actual
;
5989 *target
= e
->value
.compcall
.tbp
->u
.specific
;
5991 gfc_free_ref_list (e
->ref
);
5993 e
->value
.compcall
.actual
= NULL
;
5995 /* If we find a deferred typebound procedure, check for derived types
5996 that an overriding typebound procedure has not been missed. */
5997 if (e
->value
.compcall
.name
5998 && !e
->value
.compcall
.tbp
->non_overridable
5999 && e
->value
.compcall
.base_object
6000 && e
->value
.compcall
.base_object
->ts
.type
== BT_DERIVED
)
6003 gfc_symbol
*derived
;
6005 /* Use the derived type of the base_object. */
6006 derived
= e
->value
.compcall
.base_object
->ts
.u
.derived
;
6009 /* If necessary, go through the inheritance chain. */
6010 while (!st
&& derived
)
6012 /* Look for the typebound procedure 'name'. */
6013 if (derived
->f2k_derived
&& derived
->f2k_derived
->tb_sym_root
)
6014 st
= gfc_find_symtree (derived
->f2k_derived
->tb_sym_root
,
6015 e
->value
.compcall
.name
);
6017 derived
= gfc_get_derived_super_type (derived
);
6020 /* Now find the specific name in the derived type namespace. */
6021 if (st
&& st
->n
.tb
&& st
->n
.tb
->u
.specific
)
6022 gfc_find_sym_tree (st
->n
.tb
->u
.specific
->name
,
6023 derived
->ns
, 1, &st
);
6031 /* Get the ultimate declared type from an expression. In addition,
6032 return the last class/derived type reference and the copy of the
6033 reference list. If check_types is set true, derived types are
6034 identified as well as class references. */
6036 get_declared_from_expr (gfc_ref
**class_ref
, gfc_ref
**new_ref
,
6037 gfc_expr
*e
, bool check_types
)
6039 gfc_symbol
*declared
;
6046 *new_ref
= gfc_copy_ref (e
->ref
);
6048 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
6050 if (ref
->type
!= REF_COMPONENT
)
6053 if ((ref
->u
.c
.component
->ts
.type
== BT_CLASS
6054 || (check_types
&& gfc_bt_struct (ref
->u
.c
.component
->ts
.type
)))
6055 && ref
->u
.c
.component
->attr
.flavor
!= FL_PROCEDURE
)
6057 declared
= ref
->u
.c
.component
->ts
.u
.derived
;
6063 if (declared
== NULL
)
6064 declared
= e
->symtree
->n
.sym
->ts
.u
.derived
;
6070 /* Given an EXPR_COMPCALL calling a GENERIC typebound procedure, figure out
6071 which of the specific bindings (if any) matches the arglist and transform
6072 the expression into a call of that binding. */
6075 resolve_typebound_generic_call (gfc_expr
* e
, const char **name
)
6077 gfc_typebound_proc
* genproc
;
6078 const char* genname
;
6080 gfc_symbol
*derived
;
6082 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6083 genname
= e
->value
.compcall
.name
;
6084 genproc
= e
->value
.compcall
.tbp
;
6086 if (!genproc
->is_generic
)
6089 /* Try the bindings on this type and in the inheritance hierarchy. */
6090 for (; genproc
; genproc
= genproc
->overridden
)
6094 gcc_assert (genproc
->is_generic
);
6095 for (g
= genproc
->u
.generic
; g
; g
= g
->next
)
6098 gfc_actual_arglist
* args
;
6101 gcc_assert (g
->specific
);
6103 if (g
->specific
->error
)
6106 target
= g
->specific
->u
.specific
->n
.sym
;
6108 /* Get the right arglist by handling PASS/NOPASS. */
6109 args
= gfc_copy_actual_arglist (e
->value
.compcall
.actual
);
6110 if (!g
->specific
->nopass
)
6113 po
= extract_compcall_passed_object (e
);
6116 gfc_free_actual_arglist (args
);
6120 gcc_assert (g
->specific
->pass_arg_num
> 0);
6121 gcc_assert (!g
->specific
->error
);
6122 args
= update_arglist_pass (args
, po
, g
->specific
->pass_arg_num
,
6123 g
->specific
->pass_arg
);
6125 resolve_actual_arglist (args
, target
->attr
.proc
,
6126 is_external_proc (target
)
6127 && gfc_sym_get_dummy_args (target
) == NULL
);
6129 /* Check if this arglist matches the formal. */
6130 matches
= gfc_arglist_matches_symbol (&args
, target
);
6132 /* Clean up and break out of the loop if we've found it. */
6133 gfc_free_actual_arglist (args
);
6136 e
->value
.compcall
.tbp
= g
->specific
;
6137 genname
= g
->specific_st
->name
;
6138 /* Pass along the name for CLASS methods, where the vtab
6139 procedure pointer component has to be referenced. */
6147 /* Nothing matching found! */
6148 gfc_error ("Found no matching specific binding for the call to the GENERIC"
6149 " %qs at %L", genname
, &e
->where
);
6153 /* Make sure that we have the right specific instance for the name. */
6154 derived
= get_declared_from_expr (NULL
, NULL
, e
, true);
6156 st
= gfc_find_typebound_proc (derived
, NULL
, genname
, true, &e
->where
);
6158 e
->value
.compcall
.tbp
= st
->n
.tb
;
6164 /* Resolve a call to a type-bound subroutine. */
6167 resolve_typebound_call (gfc_code
* c
, const char **name
, bool *overridable
)
6169 gfc_actual_arglist
* newactual
;
6170 gfc_symtree
* target
;
6172 /* Check that's really a SUBROUTINE. */
6173 if (!c
->expr1
->value
.compcall
.tbp
->subroutine
)
6175 gfc_error ("%qs at %L should be a SUBROUTINE",
6176 c
->expr1
->value
.compcall
.name
, &c
->loc
);
6180 if (!check_typebound_baseobject (c
->expr1
))
6183 /* Pass along the name for CLASS methods, where the vtab
6184 procedure pointer component has to be referenced. */
6186 *name
= c
->expr1
->value
.compcall
.name
;
6188 if (!resolve_typebound_generic_call (c
->expr1
, name
))
6191 /* Pass along the NON_OVERRIDABLE attribute of the specific TBP. */
6193 *overridable
= !c
->expr1
->value
.compcall
.tbp
->non_overridable
;
6195 /* Transform into an ordinary EXEC_CALL for now. */
6197 if (!resolve_typebound_static (c
->expr1
, &target
, &newactual
))
6200 c
->ext
.actual
= newactual
;
6201 c
->symtree
= target
;
6202 c
->op
= (c
->expr1
->value
.compcall
.assign
? EXEC_ASSIGN_CALL
: EXEC_CALL
);
6204 gcc_assert (!c
->expr1
->ref
&& !c
->expr1
->value
.compcall
.actual
);
6206 gfc_free_expr (c
->expr1
);
6207 c
->expr1
= gfc_get_expr ();
6208 c
->expr1
->expr_type
= EXPR_FUNCTION
;
6209 c
->expr1
->symtree
= target
;
6210 c
->expr1
->where
= c
->loc
;
6212 return resolve_call (c
);
6216 /* Resolve a component-call expression. */
6218 resolve_compcall (gfc_expr
* e
, const char **name
)
6220 gfc_actual_arglist
* newactual
;
6221 gfc_symtree
* target
;
6223 /* Check that's really a FUNCTION. */
6224 if (!e
->value
.compcall
.tbp
->function
)
6226 gfc_error ("%qs at %L should be a FUNCTION",
6227 e
->value
.compcall
.name
, &e
->where
);
6231 /* These must not be assign-calls! */
6232 gcc_assert (!e
->value
.compcall
.assign
);
6234 if (!check_typebound_baseobject (e
))
6237 /* Pass along the name for CLASS methods, where the vtab
6238 procedure pointer component has to be referenced. */
6240 *name
= e
->value
.compcall
.name
;
6242 if (!resolve_typebound_generic_call (e
, name
))
6244 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6246 /* Take the rank from the function's symbol. */
6247 if (e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
)
6248 e
->rank
= e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
->rank
;
6250 /* For now, we simply transform it into an EXPR_FUNCTION call with the same
6251 arglist to the TBP's binding target. */
6253 if (!resolve_typebound_static (e
, &target
, &newactual
))
6256 e
->value
.function
.actual
= newactual
;
6257 e
->value
.function
.name
= NULL
;
6258 e
->value
.function
.esym
= target
->n
.sym
;
6259 e
->value
.function
.isym
= NULL
;
6260 e
->symtree
= target
;
6261 e
->ts
= target
->n
.sym
->ts
;
6262 e
->expr_type
= EXPR_FUNCTION
;
6264 /* Resolution is not necessary if this is a class subroutine; this
6265 function only has to identify the specific proc. Resolution of
6266 the call will be done next in resolve_typebound_call. */
6267 return gfc_resolve_expr (e
);
6271 static bool resolve_fl_derived (gfc_symbol
*sym
);
6274 /* Resolve a typebound function, or 'method'. First separate all
6275 the non-CLASS references by calling resolve_compcall directly. */
6278 resolve_typebound_function (gfc_expr
* e
)
6280 gfc_symbol
*declared
;
6292 /* Deal with typebound operators for CLASS objects. */
6293 expr
= e
->value
.compcall
.base_object
;
6294 overridable
= !e
->value
.compcall
.tbp
->non_overridable
;
6295 if (expr
&& expr
->ts
.type
== BT_CLASS
&& e
->value
.compcall
.name
)
6297 /* If the base_object is not a variable, the corresponding actual
6298 argument expression must be stored in e->base_expression so
6299 that the corresponding tree temporary can be used as the base
6300 object in gfc_conv_procedure_call. */
6301 if (expr
->expr_type
!= EXPR_VARIABLE
)
6303 gfc_actual_arglist
*args
;
6305 for (args
= e
->value
.function
.actual
; args
; args
= args
->next
)
6307 if (expr
== args
->expr
)
6312 /* Since the typebound operators are generic, we have to ensure
6313 that any delays in resolution are corrected and that the vtab
6316 declared
= ts
.u
.derived
;
6317 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6318 if (c
->ts
.u
.derived
== NULL
)
6319 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6321 if (!resolve_compcall (e
, &name
))
6324 /* Use the generic name if it is there. */
6325 name
= name
? name
: e
->value
.function
.esym
->name
;
6326 e
->symtree
= expr
->symtree
;
6327 e
->ref
= gfc_copy_ref (expr
->ref
);
6328 get_declared_from_expr (&class_ref
, NULL
, e
, false);
6330 /* Trim away the extraneous references that emerge from nested
6331 use of interface.c (extend_expr). */
6332 if (class_ref
&& class_ref
->next
)
6334 gfc_free_ref_list (class_ref
->next
);
6335 class_ref
->next
= NULL
;
6337 else if (e
->ref
&& !class_ref
&& expr
->ts
.type
!= BT_CLASS
)
6339 gfc_free_ref_list (e
->ref
);
6343 gfc_add_vptr_component (e
);
6344 gfc_add_component_ref (e
, name
);
6345 e
->value
.function
.esym
= NULL
;
6346 if (expr
->expr_type
!= EXPR_VARIABLE
)
6347 e
->base_expr
= expr
;
6352 return resolve_compcall (e
, NULL
);
6354 if (!resolve_ref (e
))
6357 /* Get the CLASS declared type. */
6358 declared
= get_declared_from_expr (&class_ref
, &new_ref
, e
, true);
6360 if (!resolve_fl_derived (declared
))
6363 /* Weed out cases of the ultimate component being a derived type. */
6364 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6365 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6367 gfc_free_ref_list (new_ref
);
6368 return resolve_compcall (e
, NULL
);
6371 c
= gfc_find_component (declared
, "_data", true, true, NULL
);
6372 declared
= c
->ts
.u
.derived
;
6374 /* Treat the call as if it is a typebound procedure, in order to roll
6375 out the correct name for the specific function. */
6376 if (!resolve_compcall (e
, &name
))
6378 gfc_free_ref_list (new_ref
);
6385 /* Convert the expression to a procedure pointer component call. */
6386 e
->value
.function
.esym
= NULL
;
6392 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6393 gfc_add_vptr_component (e
);
6394 gfc_add_component_ref (e
, name
);
6396 /* Recover the typespec for the expression. This is really only
6397 necessary for generic procedures, where the additional call
6398 to gfc_add_component_ref seems to throw the collection of the
6399 correct typespec. */
6403 gfc_free_ref_list (new_ref
);
6408 /* Resolve a typebound subroutine, or 'method'. First separate all
6409 the non-CLASS references by calling resolve_typebound_call
6413 resolve_typebound_subroutine (gfc_code
*code
)
6415 gfc_symbol
*declared
;
6425 st
= code
->expr1
->symtree
;
6427 /* Deal with typebound operators for CLASS objects. */
6428 expr
= code
->expr1
->value
.compcall
.base_object
;
6429 overridable
= !code
->expr1
->value
.compcall
.tbp
->non_overridable
;
6430 if (expr
&& expr
->ts
.type
== BT_CLASS
&& code
->expr1
->value
.compcall
.name
)
6432 /* If the base_object is not a variable, the corresponding actual
6433 argument expression must be stored in e->base_expression so
6434 that the corresponding tree temporary can be used as the base
6435 object in gfc_conv_procedure_call. */
6436 if (expr
->expr_type
!= EXPR_VARIABLE
)
6438 gfc_actual_arglist
*args
;
6440 args
= code
->expr1
->value
.function
.actual
;
6441 for (; args
; args
= args
->next
)
6442 if (expr
== args
->expr
)
6446 /* Since the typebound operators are generic, we have to ensure
6447 that any delays in resolution are corrected and that the vtab
6449 declared
= expr
->ts
.u
.derived
;
6450 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6451 if (c
->ts
.u
.derived
== NULL
)
6452 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6454 if (!resolve_typebound_call (code
, &name
, NULL
))
6457 /* Use the generic name if it is there. */
6458 name
= name
? name
: code
->expr1
->value
.function
.esym
->name
;
6459 code
->expr1
->symtree
= expr
->symtree
;
6460 code
->expr1
->ref
= gfc_copy_ref (expr
->ref
);
6462 /* Trim away the extraneous references that emerge from nested
6463 use of interface.c (extend_expr). */
6464 get_declared_from_expr (&class_ref
, NULL
, code
->expr1
, false);
6465 if (class_ref
&& class_ref
->next
)
6467 gfc_free_ref_list (class_ref
->next
);
6468 class_ref
->next
= NULL
;
6470 else if (code
->expr1
->ref
&& !class_ref
)
6472 gfc_free_ref_list (code
->expr1
->ref
);
6473 code
->expr1
->ref
= NULL
;
6476 /* Now use the procedure in the vtable. */
6477 gfc_add_vptr_component (code
->expr1
);
6478 gfc_add_component_ref (code
->expr1
, name
);
6479 code
->expr1
->value
.function
.esym
= NULL
;
6480 if (expr
->expr_type
!= EXPR_VARIABLE
)
6481 code
->expr1
->base_expr
= expr
;
6486 return resolve_typebound_call (code
, NULL
, NULL
);
6488 if (!resolve_ref (code
->expr1
))
6491 /* Get the CLASS declared type. */
6492 get_declared_from_expr (&class_ref
, &new_ref
, code
->expr1
, true);
6494 /* Weed out cases of the ultimate component being a derived type. */
6495 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6496 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6498 gfc_free_ref_list (new_ref
);
6499 return resolve_typebound_call (code
, NULL
, NULL
);
6502 if (!resolve_typebound_call (code
, &name
, &overridable
))
6504 gfc_free_ref_list (new_ref
);
6507 ts
= code
->expr1
->ts
;
6511 /* Convert the expression to a procedure pointer component call. */
6512 code
->expr1
->value
.function
.esym
= NULL
;
6513 code
->expr1
->symtree
= st
;
6516 code
->expr1
->ref
= new_ref
;
6518 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6519 gfc_add_vptr_component (code
->expr1
);
6520 gfc_add_component_ref (code
->expr1
, name
);
6522 /* Recover the typespec for the expression. This is really only
6523 necessary for generic procedures, where the additional call
6524 to gfc_add_component_ref seems to throw the collection of the
6525 correct typespec. */
6526 code
->expr1
->ts
= ts
;
6529 gfc_free_ref_list (new_ref
);
6535 /* Resolve a CALL to a Procedure Pointer Component (Subroutine). */
6538 resolve_ppc_call (gfc_code
* c
)
6540 gfc_component
*comp
;
6542 comp
= gfc_get_proc_ptr_comp (c
->expr1
);
6543 gcc_assert (comp
!= NULL
);
6545 c
->resolved_sym
= c
->expr1
->symtree
->n
.sym
;
6546 c
->expr1
->expr_type
= EXPR_VARIABLE
;
6548 if (!comp
->attr
.subroutine
)
6549 gfc_add_subroutine (&comp
->attr
, comp
->name
, &c
->expr1
->where
);
6551 if (!resolve_ref (c
->expr1
))
6554 if (!update_ppc_arglist (c
->expr1
))
6557 c
->ext
.actual
= c
->expr1
->value
.compcall
.actual
;
6559 if (!resolve_actual_arglist (c
->ext
.actual
, comp
->attr
.proc
,
6560 !(comp
->ts
.interface
6561 && comp
->ts
.interface
->formal
)))
6564 if (!pure_subroutine (comp
->ts
.interface
, comp
->name
, &c
->expr1
->where
))
6567 gfc_ppc_use (comp
, &c
->expr1
->value
.compcall
.actual
, &c
->expr1
->where
);
6573 /* Resolve a Function Call to a Procedure Pointer Component (Function). */
6576 resolve_expr_ppc (gfc_expr
* e
)
6578 gfc_component
*comp
;
6580 comp
= gfc_get_proc_ptr_comp (e
);
6581 gcc_assert (comp
!= NULL
);
6583 /* Convert to EXPR_FUNCTION. */
6584 e
->expr_type
= EXPR_FUNCTION
;
6585 e
->value
.function
.isym
= NULL
;
6586 e
->value
.function
.actual
= e
->value
.compcall
.actual
;
6588 if (comp
->as
!= NULL
)
6589 e
->rank
= comp
->as
->rank
;
6591 if (!comp
->attr
.function
)
6592 gfc_add_function (&comp
->attr
, comp
->name
, &e
->where
);
6594 if (!resolve_ref (e
))
6597 if (!resolve_actual_arglist (e
->value
.function
.actual
, comp
->attr
.proc
,
6598 !(comp
->ts
.interface
6599 && comp
->ts
.interface
->formal
)))
6602 if (!update_ppc_arglist (e
))
6605 if (!check_pure_function(e
))
6608 gfc_ppc_use (comp
, &e
->value
.compcall
.actual
, &e
->where
);
6615 gfc_is_expandable_expr (gfc_expr
*e
)
6617 gfc_constructor
*con
;
6619 if (e
->expr_type
== EXPR_ARRAY
)
6621 /* Traverse the constructor looking for variables that are flavor
6622 parameter. Parameters must be expanded since they are fully used at
6624 con
= gfc_constructor_first (e
->value
.constructor
);
6625 for (; con
; con
= gfc_constructor_next (con
))
6627 if (con
->expr
->expr_type
== EXPR_VARIABLE
6628 && con
->expr
->symtree
6629 && (con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
6630 || con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_VARIABLE
))
6632 if (con
->expr
->expr_type
== EXPR_ARRAY
6633 && gfc_is_expandable_expr (con
->expr
))
6642 /* Sometimes variables in specification expressions of the result
6643 of module procedures in submodules wind up not being the 'real'
6644 dummy. Find this, if possible, in the namespace of the first
6648 fixup_unique_dummy (gfc_expr
*e
)
6650 gfc_symtree
*st
= NULL
;
6651 gfc_symbol
*s
= NULL
;
6653 if (e
->symtree
->n
.sym
->ns
->proc_name
6654 && e
->symtree
->n
.sym
->ns
->proc_name
->formal
)
6655 s
= e
->symtree
->n
.sym
->ns
->proc_name
->formal
->sym
;
6658 st
= gfc_find_symtree (s
->ns
->sym_root
, e
->symtree
->n
.sym
->name
);
6661 && st
->n
.sym
!= NULL
6662 && st
->n
.sym
->attr
.dummy
)
6666 /* Resolve an expression. That is, make sure that types of operands agree
6667 with their operators, intrinsic operators are converted to function calls
6668 for overloaded types and unresolved function references are resolved. */
6671 gfc_resolve_expr (gfc_expr
*e
)
6674 bool inquiry_save
, actual_arg_save
, first_actual_arg_save
;
6679 /* inquiry_argument only applies to variables. */
6680 inquiry_save
= inquiry_argument
;
6681 actual_arg_save
= actual_arg
;
6682 first_actual_arg_save
= first_actual_arg
;
6684 if (e
->expr_type
!= EXPR_VARIABLE
)
6686 inquiry_argument
= false;
6688 first_actual_arg
= false;
6690 else if (e
->symtree
!= NULL
6691 && *e
->symtree
->name
== '@'
6692 && e
->symtree
->n
.sym
->attr
.dummy
)
6694 /* Deal with submodule specification expressions that are not
6695 found to be referenced in module.c(read_cleanup). */
6696 fixup_unique_dummy (e
);
6699 switch (e
->expr_type
)
6702 t
= resolve_operator (e
);
6708 if (check_host_association (e
))
6709 t
= resolve_function (e
);
6711 t
= resolve_variable (e
);
6713 if (e
->ts
.type
== BT_CHARACTER
&& e
->ts
.u
.cl
== NULL
&& e
->ref
6714 && e
->ref
->type
!= REF_SUBSTRING
)
6715 gfc_resolve_substring_charlen (e
);
6720 t
= resolve_typebound_function (e
);
6723 case EXPR_SUBSTRING
:
6724 t
= resolve_ref (e
);
6733 t
= resolve_expr_ppc (e
);
6738 if (!resolve_ref (e
))
6741 t
= gfc_resolve_array_constructor (e
);
6742 /* Also try to expand a constructor. */
6745 expression_rank (e
);
6746 if (gfc_is_constant_expr (e
) || gfc_is_expandable_expr (e
))
6747 gfc_expand_constructor (e
, false);
6750 /* This provides the opportunity for the length of constructors with
6751 character valued function elements to propagate the string length
6752 to the expression. */
6753 if (t
&& e
->ts
.type
== BT_CHARACTER
)
6755 /* For efficiency, we call gfc_expand_constructor for BT_CHARACTER
6756 here rather then add a duplicate test for it above. */
6757 gfc_expand_constructor (e
, false);
6758 t
= gfc_resolve_character_array_constructor (e
);
6763 case EXPR_STRUCTURE
:
6764 t
= resolve_ref (e
);
6768 t
= resolve_structure_cons (e
, 0);
6772 t
= gfc_simplify_expr (e
, 0);
6776 gfc_internal_error ("gfc_resolve_expr(): Bad expression type");
6779 if (e
->ts
.type
== BT_CHARACTER
&& t
&& !e
->ts
.u
.cl
)
6782 inquiry_argument
= inquiry_save
;
6783 actual_arg
= actual_arg_save
;
6784 first_actual_arg
= first_actual_arg_save
;
6790 /* Resolve an expression from an iterator. They must be scalar and have
6791 INTEGER or (optionally) REAL type. */
6794 gfc_resolve_iterator_expr (gfc_expr
*expr
, bool real_ok
,
6795 const char *name_msgid
)
6797 if (!gfc_resolve_expr (expr
))
6800 if (expr
->rank
!= 0)
6802 gfc_error ("%s at %L must be a scalar", _(name_msgid
), &expr
->where
);
6806 if (expr
->ts
.type
!= BT_INTEGER
)
6808 if (expr
->ts
.type
== BT_REAL
)
6811 return gfc_notify_std (GFC_STD_F95_DEL
,
6812 "%s at %L must be integer",
6813 _(name_msgid
), &expr
->where
);
6816 gfc_error ("%s at %L must be INTEGER", _(name_msgid
),
6823 gfc_error ("%s at %L must be INTEGER", _(name_msgid
), &expr
->where
);
6831 /* Resolve the expressions in an iterator structure. If REAL_OK is
6832 false allow only INTEGER type iterators, otherwise allow REAL types.
6833 Set own_scope to true for ac-implied-do and data-implied-do as those
6834 have a separate scope such that, e.g., a INTENT(IN) doesn't apply. */
6837 gfc_resolve_iterator (gfc_iterator
*iter
, bool real_ok
, bool own_scope
)
6839 if (!gfc_resolve_iterator_expr (iter
->var
, real_ok
, "Loop variable"))
6842 if (!gfc_check_vardef_context (iter
->var
, false, false, own_scope
,
6843 _("iterator variable")))
6846 if (!gfc_resolve_iterator_expr (iter
->start
, real_ok
,
6847 "Start expression in DO loop"))
6850 if (!gfc_resolve_iterator_expr (iter
->end
, real_ok
,
6851 "End expression in DO loop"))
6854 if (!gfc_resolve_iterator_expr (iter
->step
, real_ok
,
6855 "Step expression in DO loop"))
6858 if (iter
->step
->expr_type
== EXPR_CONSTANT
)
6860 if ((iter
->step
->ts
.type
== BT_INTEGER
6861 && mpz_cmp_ui (iter
->step
->value
.integer
, 0) == 0)
6862 || (iter
->step
->ts
.type
== BT_REAL
6863 && mpfr_sgn (iter
->step
->value
.real
) == 0))
6865 gfc_error ("Step expression in DO loop at %L cannot be zero",
6866 &iter
->step
->where
);
6871 /* Convert start, end, and step to the same type as var. */
6872 if (iter
->start
->ts
.kind
!= iter
->var
->ts
.kind
6873 || iter
->start
->ts
.type
!= iter
->var
->ts
.type
)
6874 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
6876 if (iter
->end
->ts
.kind
!= iter
->var
->ts
.kind
6877 || iter
->end
->ts
.type
!= iter
->var
->ts
.type
)
6878 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
6880 if (iter
->step
->ts
.kind
!= iter
->var
->ts
.kind
6881 || iter
->step
->ts
.type
!= iter
->var
->ts
.type
)
6882 gfc_convert_type (iter
->step
, &iter
->var
->ts
, 1);
6884 if (iter
->start
->expr_type
== EXPR_CONSTANT
6885 && iter
->end
->expr_type
== EXPR_CONSTANT
6886 && iter
->step
->expr_type
== EXPR_CONSTANT
)
6889 if (iter
->start
->ts
.type
== BT_INTEGER
)
6891 sgn
= mpz_cmp_ui (iter
->step
->value
.integer
, 0);
6892 cmp
= mpz_cmp (iter
->end
->value
.integer
, iter
->start
->value
.integer
);
6896 sgn
= mpfr_sgn (iter
->step
->value
.real
);
6897 cmp
= mpfr_cmp (iter
->end
->value
.real
, iter
->start
->value
.real
);
6899 if (warn_zerotrip
&& ((sgn
> 0 && cmp
< 0) || (sgn
< 0 && cmp
> 0)))
6900 gfc_warning (OPT_Wzerotrip
,
6901 "DO loop at %L will be executed zero times",
6902 &iter
->step
->where
);
6905 if (iter
->end
->expr_type
== EXPR_CONSTANT
6906 && iter
->end
->ts
.type
== BT_INTEGER
6907 && iter
->step
->expr_type
== EXPR_CONSTANT
6908 && iter
->step
->ts
.type
== BT_INTEGER
6909 && (mpz_cmp_si (iter
->step
->value
.integer
, -1L) == 0
6910 || mpz_cmp_si (iter
->step
->value
.integer
, 1L) == 0))
6912 bool is_step_positive
= mpz_cmp_ui (iter
->step
->value
.integer
, 1) == 0;
6913 int k
= gfc_validate_kind (BT_INTEGER
, iter
->end
->ts
.kind
, false);
6915 if (is_step_positive
6916 && mpz_cmp (iter
->end
->value
.integer
, gfc_integer_kinds
[k
].huge
) == 0)
6917 gfc_warning (OPT_Wundefined_do_loop
,
6918 "DO loop at %L is undefined as it overflows",
6919 &iter
->step
->where
);
6920 else if (!is_step_positive
6921 && mpz_cmp (iter
->end
->value
.integer
,
6922 gfc_integer_kinds
[k
].min_int
) == 0)
6923 gfc_warning (OPT_Wundefined_do_loop
,
6924 "DO loop at %L is undefined as it underflows",
6925 &iter
->step
->where
);
6932 /* Traversal function for find_forall_index. f == 2 signals that
6933 that variable itself is not to be checked - only the references. */
6936 forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int *f
)
6938 if (expr
->expr_type
!= EXPR_VARIABLE
)
6941 /* A scalar assignment */
6942 if (!expr
->ref
|| *f
== 1)
6944 if (expr
->symtree
->n
.sym
== sym
)
6956 /* Check whether the FORALL index appears in the expression or not.
6957 Returns true if SYM is found in EXPR. */
6960 find_forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int f
)
6962 if (gfc_traverse_expr (expr
, sym
, forall_index
, f
))
6969 /* Resolve a list of FORALL iterators. The FORALL index-name is constrained
6970 to be a scalar INTEGER variable. The subscripts and stride are scalar
6971 INTEGERs, and if stride is a constant it must be nonzero.
6972 Furthermore "A subscript or stride in a forall-triplet-spec shall
6973 not contain a reference to any index-name in the
6974 forall-triplet-spec-list in which it appears." (7.5.4.1) */
6977 resolve_forall_iterators (gfc_forall_iterator
*it
)
6979 gfc_forall_iterator
*iter
, *iter2
;
6981 for (iter
= it
; iter
; iter
= iter
->next
)
6983 if (gfc_resolve_expr (iter
->var
)
6984 && (iter
->var
->ts
.type
!= BT_INTEGER
|| iter
->var
->rank
!= 0))
6985 gfc_error ("FORALL index-name at %L must be a scalar INTEGER",
6988 if (gfc_resolve_expr (iter
->start
)
6989 && (iter
->start
->ts
.type
!= BT_INTEGER
|| iter
->start
->rank
!= 0))
6990 gfc_error ("FORALL start expression at %L must be a scalar INTEGER",
6991 &iter
->start
->where
);
6992 if (iter
->var
->ts
.kind
!= iter
->start
->ts
.kind
)
6993 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
6995 if (gfc_resolve_expr (iter
->end
)
6996 && (iter
->end
->ts
.type
!= BT_INTEGER
|| iter
->end
->rank
!= 0))
6997 gfc_error ("FORALL end expression at %L must be a scalar INTEGER",
6999 if (iter
->var
->ts
.kind
!= iter
->end
->ts
.kind
)
7000 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7002 if (gfc_resolve_expr (iter
->stride
))
7004 if (iter
->stride
->ts
.type
!= BT_INTEGER
|| iter
->stride
->rank
!= 0)
7005 gfc_error ("FORALL stride expression at %L must be a scalar %s",
7006 &iter
->stride
->where
, "INTEGER");
7008 if (iter
->stride
->expr_type
== EXPR_CONSTANT
7009 && mpz_cmp_ui (iter
->stride
->value
.integer
, 0) == 0)
7010 gfc_error ("FORALL stride expression at %L cannot be zero",
7011 &iter
->stride
->where
);
7013 if (iter
->var
->ts
.kind
!= iter
->stride
->ts
.kind
)
7014 gfc_convert_type (iter
->stride
, &iter
->var
->ts
, 1);
7017 for (iter
= it
; iter
; iter
= iter
->next
)
7018 for (iter2
= iter
; iter2
; iter2
= iter2
->next
)
7020 if (find_forall_index (iter2
->start
, iter
->var
->symtree
->n
.sym
, 0)
7021 || find_forall_index (iter2
->end
, iter
->var
->symtree
->n
.sym
, 0)
7022 || find_forall_index (iter2
->stride
, iter
->var
->symtree
->n
.sym
, 0))
7023 gfc_error ("FORALL index %qs may not appear in triplet "
7024 "specification at %L", iter
->var
->symtree
->name
,
7025 &iter2
->start
->where
);
7030 /* Given a pointer to a symbol that is a derived type, see if it's
7031 inaccessible, i.e. if it's defined in another module and the components are
7032 PRIVATE. The search is recursive if necessary. Returns zero if no
7033 inaccessible components are found, nonzero otherwise. */
7036 derived_inaccessible (gfc_symbol
*sym
)
7040 if (sym
->attr
.use_assoc
&& sym
->attr
.private_comp
)
7043 for (c
= sym
->components
; c
; c
= c
->next
)
7045 /* Prevent an infinite loop through this function. */
7046 if (c
->ts
.type
== BT_DERIVED
&& c
->attr
.pointer
7047 && sym
== c
->ts
.u
.derived
)
7050 if (c
->ts
.type
== BT_DERIVED
&& derived_inaccessible (c
->ts
.u
.derived
))
7058 /* Resolve the argument of a deallocate expression. The expression must be
7059 a pointer or a full array. */
7062 resolve_deallocate_expr (gfc_expr
*e
)
7064 symbol_attribute attr
;
7065 int allocatable
, pointer
;
7071 if (!gfc_resolve_expr (e
))
7074 if (e
->expr_type
!= EXPR_VARIABLE
)
7077 sym
= e
->symtree
->n
.sym
;
7078 unlimited
= UNLIMITED_POLY(sym
);
7080 if (sym
->ts
.type
== BT_CLASS
)
7082 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7083 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7087 allocatable
= sym
->attr
.allocatable
;
7088 pointer
= sym
->attr
.pointer
;
7090 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7095 if (ref
->u
.ar
.type
!= AR_FULL
7096 && !(ref
->u
.ar
.type
== AR_ELEMENT
&& ref
->u
.ar
.as
->rank
== 0
7097 && ref
->u
.ar
.codimen
&& gfc_ref_this_image (ref
)))
7102 c
= ref
->u
.c
.component
;
7103 if (c
->ts
.type
== BT_CLASS
)
7105 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7106 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7110 allocatable
= c
->attr
.allocatable
;
7111 pointer
= c
->attr
.pointer
;
7121 attr
= gfc_expr_attr (e
);
7123 if (allocatable
== 0 && attr
.pointer
== 0 && !unlimited
)
7126 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7132 if (gfc_is_coindexed (e
))
7134 gfc_error ("Coindexed allocatable object at %L", &e
->where
);
7139 && !gfc_check_vardef_context (e
, true, true, false,
7140 _("DEALLOCATE object")))
7142 if (!gfc_check_vardef_context (e
, false, true, false,
7143 _("DEALLOCATE object")))
7150 /* Returns true if the expression e contains a reference to the symbol sym. */
7152 sym_in_expr (gfc_expr
*e
, gfc_symbol
*sym
, int *f ATTRIBUTE_UNUSED
)
7154 if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
== sym
)
7161 gfc_find_sym_in_expr (gfc_symbol
*sym
, gfc_expr
*e
)
7163 return gfc_traverse_expr (e
, sym
, sym_in_expr
, 0);
7167 /* Given the expression node e for an allocatable/pointer of derived type to be
7168 allocated, get the expression node to be initialized afterwards (needed for
7169 derived types with default initializers, and derived types with allocatable
7170 components that need nullification.) */
7173 gfc_expr_to_initialize (gfc_expr
*e
)
7179 result
= gfc_copy_expr (e
);
7181 /* Change the last array reference from AR_ELEMENT to AR_FULL. */
7182 for (ref
= result
->ref
; ref
; ref
= ref
->next
)
7183 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
7185 ref
->u
.ar
.type
= AR_FULL
;
7187 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
7188 ref
->u
.ar
.start
[i
] = ref
->u
.ar
.end
[i
] = ref
->u
.ar
.stride
[i
] = NULL
;
7193 gfc_free_shape (&result
->shape
, result
->rank
);
7195 /* Recalculate rank, shape, etc. */
7196 gfc_resolve_expr (result
);
7201 /* If the last ref of an expression is an array ref, return a copy of the
7202 expression with that one removed. Otherwise, a copy of the original
7203 expression. This is used for allocate-expressions and pointer assignment
7204 LHS, where there may be an array specification that needs to be stripped
7205 off when using gfc_check_vardef_context. */
7208 remove_last_array_ref (gfc_expr
* e
)
7213 e2
= gfc_copy_expr (e
);
7214 for (r
= &e2
->ref
; *r
; r
= &(*r
)->next
)
7215 if ((*r
)->type
== REF_ARRAY
&& !(*r
)->next
)
7217 gfc_free_ref_list (*r
);
7226 /* Used in resolve_allocate_expr to check that a allocation-object and
7227 a source-expr are conformable. This does not catch all possible
7228 cases; in particular a runtime checking is needed. */
7231 conformable_arrays (gfc_expr
*e1
, gfc_expr
*e2
)
7234 for (tail
= e2
->ref
; tail
&& tail
->next
; tail
= tail
->next
);
7236 /* First compare rank. */
7237 if ((tail
&& e1
->rank
!= tail
->u
.ar
.as
->rank
)
7238 || (!tail
&& e1
->rank
!= e2
->rank
))
7240 gfc_error ("Source-expr at %L must be scalar or have the "
7241 "same rank as the allocate-object at %L",
7242 &e1
->where
, &e2
->where
);
7253 for (i
= 0; i
< e1
->rank
; i
++)
7255 if (tail
->u
.ar
.start
[i
] == NULL
)
7258 if (tail
->u
.ar
.end
[i
])
7260 mpz_set (s
, tail
->u
.ar
.end
[i
]->value
.integer
);
7261 mpz_sub (s
, s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7262 mpz_add_ui (s
, s
, 1);
7266 mpz_set (s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7269 if (mpz_cmp (e1
->shape
[i
], s
) != 0)
7271 gfc_error ("Source-expr at %L and allocate-object at %L must "
7272 "have the same shape", &e1
->where
, &e2
->where
);
7285 /* Resolve the expression in an ALLOCATE statement, doing the additional
7286 checks to see whether the expression is OK or not. The expression must
7287 have a trailing array reference that gives the size of the array. */
7290 resolve_allocate_expr (gfc_expr
*e
, gfc_code
*code
, bool *array_alloc_wo_spec
)
7292 int i
, pointer
, allocatable
, dimension
, is_abstract
;
7296 symbol_attribute attr
;
7297 gfc_ref
*ref
, *ref2
;
7300 gfc_symbol
*sym
= NULL
;
7305 /* Mark the utmost array component as being in allocate to allow DIMEN_STAR
7306 checking of coarrays. */
7307 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7308 if (ref
->next
== NULL
)
7311 if (ref
&& ref
->type
== REF_ARRAY
)
7312 ref
->u
.ar
.in_allocate
= true;
7314 if (!gfc_resolve_expr (e
))
7317 /* Make sure the expression is allocatable or a pointer. If it is
7318 pointer, the next-to-last reference must be a pointer. */
7322 sym
= e
->symtree
->n
.sym
;
7324 /* Check whether ultimate component is abstract and CLASS. */
7327 /* Is the allocate-object unlimited polymorphic? */
7328 unlimited
= UNLIMITED_POLY(e
);
7330 if (e
->expr_type
!= EXPR_VARIABLE
)
7333 attr
= gfc_expr_attr (e
);
7334 pointer
= attr
.pointer
;
7335 dimension
= attr
.dimension
;
7336 codimension
= attr
.codimension
;
7340 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
))
7342 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7343 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7344 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
7345 codimension
= CLASS_DATA (sym
)->attr
.codimension
;
7346 is_abstract
= CLASS_DATA (sym
)->attr
.abstract
;
7350 allocatable
= sym
->attr
.allocatable
;
7351 pointer
= sym
->attr
.pointer
;
7352 dimension
= sym
->attr
.dimension
;
7353 codimension
= sym
->attr
.codimension
;
7358 for (ref
= e
->ref
; ref
; ref2
= ref
, ref
= ref
->next
)
7363 if (ref
->u
.ar
.codimen
> 0)
7366 for (n
= ref
->u
.ar
.dimen
;
7367 n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
7368 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_THIS_IMAGE
)
7375 if (ref
->next
!= NULL
)
7383 gfc_error ("Coindexed allocatable object at %L",
7388 c
= ref
->u
.c
.component
;
7389 if (c
->ts
.type
== BT_CLASS
)
7391 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7392 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7393 dimension
= CLASS_DATA (c
)->attr
.dimension
;
7394 codimension
= CLASS_DATA (c
)->attr
.codimension
;
7395 is_abstract
= CLASS_DATA (c
)->attr
.abstract
;
7399 allocatable
= c
->attr
.allocatable
;
7400 pointer
= c
->attr
.pointer
;
7401 dimension
= c
->attr
.dimension
;
7402 codimension
= c
->attr
.codimension
;
7403 is_abstract
= c
->attr
.abstract
;
7415 /* Check for F08:C628. */
7416 if (allocatable
== 0 && pointer
== 0 && !unlimited
)
7418 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7423 /* Some checks for the SOURCE tag. */
7426 /* Check F03:C631. */
7427 if (!gfc_type_compatible (&e
->ts
, &code
->expr3
->ts
))
7429 gfc_error ("Type of entity at %L is type incompatible with "
7430 "source-expr at %L", &e
->where
, &code
->expr3
->where
);
7434 /* Check F03:C632 and restriction following Note 6.18. */
7435 if (code
->expr3
->rank
> 0 && !conformable_arrays (code
->expr3
, e
))
7438 /* Check F03:C633. */
7439 if (code
->expr3
->ts
.kind
!= e
->ts
.kind
&& !unlimited
)
7441 gfc_error ("The allocate-object at %L and the source-expr at %L "
7442 "shall have the same kind type parameter",
7443 &e
->where
, &code
->expr3
->where
);
7447 /* Check F2008, C642. */
7448 if (code
->expr3
->ts
.type
== BT_DERIVED
7449 && ((codimension
&& gfc_expr_attr (code
->expr3
).lock_comp
)
7450 || (code
->expr3
->ts
.u
.derived
->from_intmod
7451 == INTMOD_ISO_FORTRAN_ENV
7452 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7453 == ISOFORTRAN_LOCK_TYPE
)))
7455 gfc_error ("The source-expr at %L shall neither be of type "
7456 "LOCK_TYPE nor have a LOCK_TYPE component if "
7457 "allocate-object at %L is a coarray",
7458 &code
->expr3
->where
, &e
->where
);
7462 /* Check TS18508, C702/C703. */
7463 if (code
->expr3
->ts
.type
== BT_DERIVED
7464 && ((codimension
&& gfc_expr_attr (code
->expr3
).event_comp
)
7465 || (code
->expr3
->ts
.u
.derived
->from_intmod
7466 == INTMOD_ISO_FORTRAN_ENV
7467 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7468 == ISOFORTRAN_EVENT_TYPE
)))
7470 gfc_error ("The source-expr at %L shall neither be of type "
7471 "EVENT_TYPE nor have a EVENT_TYPE component if "
7472 "allocate-object at %L is a coarray",
7473 &code
->expr3
->where
, &e
->where
);
7478 /* Check F08:C629. */
7479 if (is_abstract
&& code
->ext
.alloc
.ts
.type
== BT_UNKNOWN
7482 gcc_assert (e
->ts
.type
== BT_CLASS
);
7483 gfc_error ("Allocating %s of ABSTRACT base type at %L requires a "
7484 "type-spec or source-expr", sym
->name
, &e
->where
);
7488 /* Check F08:C632. */
7489 if (code
->ext
.alloc
.ts
.type
== BT_CHARACTER
&& !e
->ts
.deferred
7490 && !UNLIMITED_POLY (e
))
7494 if (!e
->ts
.u
.cl
->length
)
7497 cmp
= gfc_dep_compare_expr (e
->ts
.u
.cl
->length
,
7498 code
->ext
.alloc
.ts
.u
.cl
->length
);
7499 if (cmp
== 1 || cmp
== -1 || cmp
== -3)
7501 gfc_error ("Allocating %s at %L with type-spec requires the same "
7502 "character-length parameter as in the declaration",
7503 sym
->name
, &e
->where
);
7508 /* In the variable definition context checks, gfc_expr_attr is used
7509 on the expression. This is fooled by the array specification
7510 present in e, thus we have to eliminate that one temporarily. */
7511 e2
= remove_last_array_ref (e
);
7514 t
= gfc_check_vardef_context (e2
, true, true, false,
7515 _("ALLOCATE object"));
7517 t
= gfc_check_vardef_context (e2
, false, true, false,
7518 _("ALLOCATE object"));
7523 if (e
->ts
.type
== BT_CLASS
&& CLASS_DATA (e
)->attr
.dimension
7524 && !code
->expr3
&& code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7526 /* For class arrays, the initialization with SOURCE is done
7527 using _copy and trans_call. It is convenient to exploit that
7528 when the allocated type is different from the declared type but
7529 no SOURCE exists by setting expr3. */
7530 code
->expr3
= gfc_default_initializer (&code
->ext
.alloc
.ts
);
7532 else if (flag_coarray
!= GFC_FCOARRAY_LIB
&& e
->ts
.type
== BT_DERIVED
7533 && e
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
7534 && e
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
7536 /* We have to zero initialize the integer variable. */
7537 code
->expr3
= gfc_get_int_expr (gfc_default_integer_kind
, &e
->where
, 0);
7540 if (e
->ts
.type
== BT_CLASS
&& !unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7542 /* Make sure the vtab symbol is present when
7543 the module variables are generated. */
7544 gfc_typespec ts
= e
->ts
;
7546 ts
= code
->expr3
->ts
;
7547 else if (code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7548 ts
= code
->ext
.alloc
.ts
;
7550 /* Finding the vtab also publishes the type's symbol. Therefore this
7551 statement is necessary. */
7552 gfc_find_derived_vtab (ts
.u
.derived
);
7554 else if (unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7556 /* Again, make sure the vtab symbol is present when
7557 the module variables are generated. */
7558 gfc_typespec
*ts
= NULL
;
7560 ts
= &code
->expr3
->ts
;
7562 ts
= &code
->ext
.alloc
.ts
;
7566 /* Finding the vtab also publishes the type's symbol. Therefore this
7567 statement is necessary. */
7571 if (dimension
== 0 && codimension
== 0)
7574 /* Make sure the last reference node is an array specification. */
7576 if (!ref2
|| ref2
->type
!= REF_ARRAY
|| ref2
->u
.ar
.type
== AR_FULL
7577 || (dimension
&& ref2
->u
.ar
.dimen
== 0))
7582 if (!gfc_notify_std (GFC_STD_F2008
, "Array specification required "
7583 "in ALLOCATE statement at %L", &e
->where
))
7585 if (code
->expr3
->rank
!= 0)
7586 *array_alloc_wo_spec
= true;
7589 gfc_error ("Array specification or array-valued SOURCE= "
7590 "expression required in ALLOCATE statement at %L",
7597 gfc_error ("Array specification required in ALLOCATE statement "
7598 "at %L", &e
->where
);
7603 /* Make sure that the array section reference makes sense in the
7604 context of an ALLOCATE specification. */
7609 for (i
= ar
->dimen
; i
< ar
->dimen
+ ar
->codimen
; i
++)
7610 if (ar
->dimen_type
[i
] == DIMEN_THIS_IMAGE
)
7612 gfc_error ("Coarray specification required in ALLOCATE statement "
7613 "at %L", &e
->where
);
7617 for (i
= 0; i
< ar
->dimen
; i
++)
7619 if (ar
->type
== AR_ELEMENT
|| ar
->type
== AR_FULL
)
7622 switch (ar
->dimen_type
[i
])
7628 if (ar
->start
[i
] != NULL
7629 && ar
->end
[i
] != NULL
7630 && ar
->stride
[i
] == NULL
)
7638 case DIMEN_THIS_IMAGE
:
7639 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7645 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7647 sym
= a
->expr
->symtree
->n
.sym
;
7649 /* TODO - check derived type components. */
7650 if (gfc_bt_struct (sym
->ts
.type
) || sym
->ts
.type
== BT_CLASS
)
7653 if ((ar
->start
[i
] != NULL
7654 && gfc_find_sym_in_expr (sym
, ar
->start
[i
]))
7655 || (ar
->end
[i
] != NULL
7656 && gfc_find_sym_in_expr (sym
, ar
->end
[i
])))
7658 gfc_error ("%qs must not appear in the array specification at "
7659 "%L in the same ALLOCATE statement where it is "
7660 "itself allocated", sym
->name
, &ar
->where
);
7666 for (i
= ar
->dimen
; i
< ar
->codimen
+ ar
->dimen
; i
++)
7668 if (ar
->dimen_type
[i
] == DIMEN_ELEMENT
7669 || ar
->dimen_type
[i
] == DIMEN_RANGE
)
7671 if (i
== (ar
->dimen
+ ar
->codimen
- 1))
7673 gfc_error ("Expected '*' in coindex specification in ALLOCATE "
7674 "statement at %L", &e
->where
);
7680 if (ar
->dimen_type
[i
] == DIMEN_STAR
&& i
== (ar
->dimen
+ ar
->codimen
- 1)
7681 && ar
->stride
[i
] == NULL
)
7684 gfc_error ("Bad coarray specification in ALLOCATE statement at %L",
7698 resolve_allocate_deallocate (gfc_code
*code
, const char *fcn
)
7700 gfc_expr
*stat
, *errmsg
, *pe
, *qe
;
7701 gfc_alloc
*a
, *p
, *q
;
7704 errmsg
= code
->expr2
;
7706 /* Check the stat variable. */
7709 gfc_check_vardef_context (stat
, false, false, false,
7710 _("STAT variable"));
7712 if ((stat
->ts
.type
!= BT_INTEGER
7713 && !(stat
->ref
&& (stat
->ref
->type
== REF_ARRAY
7714 || stat
->ref
->type
== REF_COMPONENT
)))
7716 gfc_error ("Stat-variable at %L must be a scalar INTEGER "
7717 "variable", &stat
->where
);
7719 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7720 if (p
->expr
->symtree
->n
.sym
->name
== stat
->symtree
->n
.sym
->name
)
7722 gfc_ref
*ref1
, *ref2
;
7725 for (ref1
= p
->expr
->ref
, ref2
= stat
->ref
; ref1
&& ref2
;
7726 ref1
= ref1
->next
, ref2
= ref2
->next
)
7728 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7730 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7739 gfc_error ("Stat-variable at %L shall not be %sd within "
7740 "the same %s statement", &stat
->where
, fcn
, fcn
);
7746 /* Check the errmsg variable. */
7750 gfc_warning (0, "ERRMSG at %L is useless without a STAT tag",
7753 gfc_check_vardef_context (errmsg
, false, false, false,
7754 _("ERRMSG variable"));
7756 if ((errmsg
->ts
.type
!= BT_CHARACTER
7758 && (errmsg
->ref
->type
== REF_ARRAY
7759 || errmsg
->ref
->type
== REF_COMPONENT
)))
7760 || errmsg
->rank
> 0 )
7761 gfc_error ("Errmsg-variable at %L must be a scalar CHARACTER "
7762 "variable", &errmsg
->where
);
7764 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7765 if (p
->expr
->symtree
->n
.sym
->name
== errmsg
->symtree
->n
.sym
->name
)
7767 gfc_ref
*ref1
, *ref2
;
7770 for (ref1
= p
->expr
->ref
, ref2
= errmsg
->ref
; ref1
&& ref2
;
7771 ref1
= ref1
->next
, ref2
= ref2
->next
)
7773 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7775 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7784 gfc_error ("Errmsg-variable at %L shall not be %sd within "
7785 "the same %s statement", &errmsg
->where
, fcn
, fcn
);
7791 /* Check that an allocate-object appears only once in the statement. */
7793 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7796 for (q
= p
->next
; q
; q
= q
->next
)
7799 if (pe
->symtree
->n
.sym
->name
== qe
->symtree
->n
.sym
->name
)
7801 /* This is a potential collision. */
7802 gfc_ref
*pr
= pe
->ref
;
7803 gfc_ref
*qr
= qe
->ref
;
7805 /* Follow the references until
7806 a) They start to differ, in which case there is no error;
7807 you can deallocate a%b and a%c in a single statement
7808 b) Both of them stop, which is an error
7809 c) One of them stops, which is also an error. */
7812 if (pr
== NULL
&& qr
== NULL
)
7814 gfc_error ("Allocate-object at %L also appears at %L",
7815 &pe
->where
, &qe
->where
);
7818 else if (pr
!= NULL
&& qr
== NULL
)
7820 gfc_error ("Allocate-object at %L is subobject of"
7821 " object at %L", &pe
->where
, &qe
->where
);
7824 else if (pr
== NULL
&& qr
!= NULL
)
7826 gfc_error ("Allocate-object at %L is subobject of"
7827 " object at %L", &qe
->where
, &pe
->where
);
7830 /* Here, pr != NULL && qr != NULL */
7831 gcc_assert(pr
->type
== qr
->type
);
7832 if (pr
->type
== REF_ARRAY
)
7834 /* Handle cases like allocate(v(3)%x(3), v(2)%x(3)),
7836 gcc_assert (qr
->type
== REF_ARRAY
);
7838 if (pr
->next
&& qr
->next
)
7841 gfc_array_ref
*par
= &(pr
->u
.ar
);
7842 gfc_array_ref
*qar
= &(qr
->u
.ar
);
7844 for (i
=0; i
<par
->dimen
; i
++)
7846 if ((par
->start
[i
] != NULL
7847 || qar
->start
[i
] != NULL
)
7848 && gfc_dep_compare_expr (par
->start
[i
],
7849 qar
->start
[i
]) != 0)
7856 if (pr
->u
.c
.component
->name
!= qr
->u
.c
.component
->name
)
7869 if (strcmp (fcn
, "ALLOCATE") == 0)
7871 bool arr_alloc_wo_spec
= false;
7873 /* Resolving the expr3 in the loop over all objects to allocate would
7874 execute loop invariant code for each loop item. Therefore do it just
7876 if (code
->expr3
&& code
->expr3
->mold
7877 && code
->expr3
->ts
.type
== BT_DERIVED
)
7879 /* Default initialization via MOLD (non-polymorphic). */
7880 gfc_expr
*rhs
= gfc_default_initializer (&code
->expr3
->ts
);
7883 gfc_resolve_expr (rhs
);
7884 gfc_free_expr (code
->expr3
);
7888 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7889 resolve_allocate_expr (a
->expr
, code
, &arr_alloc_wo_spec
);
7891 if (arr_alloc_wo_spec
&& code
->expr3
)
7893 /* Mark the allocate to have to take the array specification
7895 code
->ext
.alloc
.arr_spec_from_expr3
= 1;
7900 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7901 resolve_deallocate_expr (a
->expr
);
7906 /************ SELECT CASE resolution subroutines ************/
7908 /* Callback function for our mergesort variant. Determines interval
7909 overlaps for CASEs. Return <0 if op1 < op2, 0 for overlap, >0 for
7910 op1 > op2. Assumes we're not dealing with the default case.
7911 We have op1 = (:L), (K:L) or (K:) and op2 = (:N), (M:N) or (M:).
7912 There are nine situations to check. */
7915 compare_cases (const gfc_case
*op1
, const gfc_case
*op2
)
7919 if (op1
->low
== NULL
) /* op1 = (:L) */
7921 /* op2 = (:N), so overlap. */
7923 /* op2 = (M:) or (M:N), L < M */
7924 if (op2
->low
!= NULL
7925 && gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
7928 else if (op1
->high
== NULL
) /* op1 = (K:) */
7930 /* op2 = (M:), so overlap. */
7932 /* op2 = (:N) or (M:N), K > N */
7933 if (op2
->high
!= NULL
7934 && gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
7937 else /* op1 = (K:L) */
7939 if (op2
->low
== NULL
) /* op2 = (:N), K > N */
7940 retval
= (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
7942 else if (op2
->high
== NULL
) /* op2 = (M:), L < M */
7943 retval
= (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
7945 else /* op2 = (M:N) */
7949 if (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
7952 else if (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
7961 /* Merge-sort a double linked case list, detecting overlap in the
7962 process. LIST is the head of the double linked case list before it
7963 is sorted. Returns the head of the sorted list if we don't see any
7964 overlap, or NULL otherwise. */
7967 check_case_overlap (gfc_case
*list
)
7969 gfc_case
*p
, *q
, *e
, *tail
;
7970 int insize
, nmerges
, psize
, qsize
, cmp
, overlap_seen
;
7972 /* If the passed list was empty, return immediately. */
7979 /* Loop unconditionally. The only exit from this loop is a return
7980 statement, when we've finished sorting the case list. */
7987 /* Count the number of merges we do in this pass. */
7990 /* Loop while there exists a merge to be done. */
7995 /* Count this merge. */
7998 /* Cut the list in two pieces by stepping INSIZE places
7999 forward in the list, starting from P. */
8002 for (i
= 0; i
< insize
; i
++)
8011 /* Now we have two lists. Merge them! */
8012 while (psize
> 0 || (qsize
> 0 && q
!= NULL
))
8014 /* See from which the next case to merge comes from. */
8017 /* P is empty so the next case must come from Q. */
8022 else if (qsize
== 0 || q
== NULL
)
8031 cmp
= compare_cases (p
, q
);
8034 /* The whole case range for P is less than the
8042 /* The whole case range for Q is greater than
8043 the case range for P. */
8050 /* The cases overlap, or they are the same
8051 element in the list. Either way, we must
8052 issue an error and get the next case from P. */
8053 /* FIXME: Sort P and Q by line number. */
8054 gfc_error ("CASE label at %L overlaps with CASE "
8055 "label at %L", &p
->where
, &q
->where
);
8063 /* Add the next element to the merged list. */
8072 /* P has now stepped INSIZE places along, and so has Q. So
8073 they're the same. */
8078 /* If we have done only one merge or none at all, we've
8079 finished sorting the cases. */
8088 /* Otherwise repeat, merging lists twice the size. */
8094 /* Check to see if an expression is suitable for use in a CASE statement.
8095 Makes sure that all case expressions are scalar constants of the same
8096 type. Return false if anything is wrong. */
8099 validate_case_label_expr (gfc_expr
*e
, gfc_expr
*case_expr
)
8101 if (e
== NULL
) return true;
8103 if (e
->ts
.type
!= case_expr
->ts
.type
)
8105 gfc_error ("Expression in CASE statement at %L must be of type %s",
8106 &e
->where
, gfc_basic_typename (case_expr
->ts
.type
));
8110 /* C805 (R808) For a given case-construct, each case-value shall be of
8111 the same type as case-expr. For character type, length differences
8112 are allowed, but the kind type parameters shall be the same. */
8114 if (case_expr
->ts
.type
== BT_CHARACTER
&& e
->ts
.kind
!= case_expr
->ts
.kind
)
8116 gfc_error ("Expression in CASE statement at %L must be of kind %d",
8117 &e
->where
, case_expr
->ts
.kind
);
8121 /* Convert the case value kind to that of case expression kind,
8124 if (e
->ts
.kind
!= case_expr
->ts
.kind
)
8125 gfc_convert_type_warn (e
, &case_expr
->ts
, 2, 0);
8129 gfc_error ("Expression in CASE statement at %L must be scalar",
8138 /* Given a completely parsed select statement, we:
8140 - Validate all expressions and code within the SELECT.
8141 - Make sure that the selection expression is not of the wrong type.
8142 - Make sure that no case ranges overlap.
8143 - Eliminate unreachable cases and unreachable code resulting from
8144 removing case labels.
8146 The standard does allow unreachable cases, e.g. CASE (5:3). But
8147 they are a hassle for code generation, and to prevent that, we just
8148 cut them out here. This is not necessary for overlapping cases
8149 because they are illegal and we never even try to generate code.
8151 We have the additional caveat that a SELECT construct could have
8152 been a computed GOTO in the source code. Fortunately we can fairly
8153 easily work around that here: The case_expr for a "real" SELECT CASE
8154 is in code->expr1, but for a computed GOTO it is in code->expr2. All
8155 we have to do is make sure that the case_expr is a scalar integer
8159 resolve_select (gfc_code
*code
, bool select_type
)
8162 gfc_expr
*case_expr
;
8163 gfc_case
*cp
, *default_case
, *tail
, *head
;
8164 int seen_unreachable
;
8170 if (code
->expr1
== NULL
)
8172 /* This was actually a computed GOTO statement. */
8173 case_expr
= code
->expr2
;
8174 if (case_expr
->ts
.type
!= BT_INTEGER
|| case_expr
->rank
!= 0)
8175 gfc_error ("Selection expression in computed GOTO statement "
8176 "at %L must be a scalar integer expression",
8179 /* Further checking is not necessary because this SELECT was built
8180 by the compiler, so it should always be OK. Just move the
8181 case_expr from expr2 to expr so that we can handle computed
8182 GOTOs as normal SELECTs from here on. */
8183 code
->expr1
= code
->expr2
;
8188 case_expr
= code
->expr1
;
8189 type
= case_expr
->ts
.type
;
8192 if (type
!= BT_LOGICAL
&& type
!= BT_INTEGER
&& type
!= BT_CHARACTER
)
8194 gfc_error ("Argument of SELECT statement at %L cannot be %s",
8195 &case_expr
->where
, gfc_typename (&case_expr
->ts
));
8197 /* Punt. Going on here just produce more garbage error messages. */
8202 if (!select_type
&& case_expr
->rank
!= 0)
8204 gfc_error ("Argument of SELECT statement at %L must be a scalar "
8205 "expression", &case_expr
->where
);
8211 /* Raise a warning if an INTEGER case value exceeds the range of
8212 the case-expr. Later, all expressions will be promoted to the
8213 largest kind of all case-labels. */
8215 if (type
== BT_INTEGER
)
8216 for (body
= code
->block
; body
; body
= body
->block
)
8217 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8220 && gfc_check_integer_range (cp
->low
->value
.integer
,
8221 case_expr
->ts
.kind
) != ARITH_OK
)
8222 gfc_warning (0, "Expression in CASE statement at %L is "
8223 "not in the range of %s", &cp
->low
->where
,
8224 gfc_typename (&case_expr
->ts
));
8227 && cp
->low
!= cp
->high
8228 && gfc_check_integer_range (cp
->high
->value
.integer
,
8229 case_expr
->ts
.kind
) != ARITH_OK
)
8230 gfc_warning (0, "Expression in CASE statement at %L is "
8231 "not in the range of %s", &cp
->high
->where
,
8232 gfc_typename (&case_expr
->ts
));
8235 /* PR 19168 has a long discussion concerning a mismatch of the kinds
8236 of the SELECT CASE expression and its CASE values. Walk the lists
8237 of case values, and if we find a mismatch, promote case_expr to
8238 the appropriate kind. */
8240 if (type
== BT_LOGICAL
|| type
== BT_INTEGER
)
8242 for (body
= code
->block
; body
; body
= body
->block
)
8244 /* Walk the case label list. */
8245 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8247 /* Intercept the DEFAULT case. It does not have a kind. */
8248 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8251 /* Unreachable case ranges are discarded, so ignore. */
8252 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8253 && cp
->low
!= cp
->high
8254 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8258 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->low
))
8259 gfc_convert_type_warn (case_expr
, &cp
->low
->ts
, 2, 0);
8261 if (cp
->high
!= NULL
8262 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->high
))
8263 gfc_convert_type_warn (case_expr
, &cp
->high
->ts
, 2, 0);
8268 /* Assume there is no DEFAULT case. */
8269 default_case
= NULL
;
8274 for (body
= code
->block
; body
; body
= body
->block
)
8276 /* Assume the CASE list is OK, and all CASE labels can be matched. */
8278 seen_unreachable
= 0;
8280 /* Walk the case label list, making sure that all case labels
8282 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8284 /* Count the number of cases in the whole construct. */
8287 /* Intercept the DEFAULT case. */
8288 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8290 if (default_case
!= NULL
)
8292 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8293 "by a second DEFAULT CASE at %L",
8294 &default_case
->where
, &cp
->where
);
8305 /* Deal with single value cases and case ranges. Errors are
8306 issued from the validation function. */
8307 if (!validate_case_label_expr (cp
->low
, case_expr
)
8308 || !validate_case_label_expr (cp
->high
, case_expr
))
8314 if (type
== BT_LOGICAL
8315 && ((cp
->low
== NULL
|| cp
->high
== NULL
)
8316 || cp
->low
!= cp
->high
))
8318 gfc_error ("Logical range in CASE statement at %L is not "
8319 "allowed", &cp
->low
->where
);
8324 if (type
== BT_LOGICAL
&& cp
->low
->expr_type
== EXPR_CONSTANT
)
8327 value
= cp
->low
->value
.logical
== 0 ? 2 : 1;
8328 if (value
& seen_logical
)
8330 gfc_error ("Constant logical value in CASE statement "
8331 "is repeated at %L",
8336 seen_logical
|= value
;
8339 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8340 && cp
->low
!= cp
->high
8341 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8343 if (warn_surprising
)
8344 gfc_warning (OPT_Wsurprising
,
8345 "Range specification at %L can never be matched",
8348 cp
->unreachable
= 1;
8349 seen_unreachable
= 1;
8353 /* If the case range can be matched, it can also overlap with
8354 other cases. To make sure it does not, we put it in a
8355 double linked list here. We sort that with a merge sort
8356 later on to detect any overlapping cases. */
8360 head
->right
= head
->left
= NULL
;
8365 tail
->right
->left
= tail
;
8372 /* It there was a failure in the previous case label, give up
8373 for this case label list. Continue with the next block. */
8377 /* See if any case labels that are unreachable have been seen.
8378 If so, we eliminate them. This is a bit of a kludge because
8379 the case lists for a single case statement (label) is a
8380 single forward linked lists. */
8381 if (seen_unreachable
)
8383 /* Advance until the first case in the list is reachable. */
8384 while (body
->ext
.block
.case_list
!= NULL
8385 && body
->ext
.block
.case_list
->unreachable
)
8387 gfc_case
*n
= body
->ext
.block
.case_list
;
8388 body
->ext
.block
.case_list
= body
->ext
.block
.case_list
->next
;
8390 gfc_free_case_list (n
);
8393 /* Strip all other unreachable cases. */
8394 if (body
->ext
.block
.case_list
)
8396 for (cp
= body
->ext
.block
.case_list
; cp
&& cp
->next
; cp
= cp
->next
)
8398 if (cp
->next
->unreachable
)
8400 gfc_case
*n
= cp
->next
;
8401 cp
->next
= cp
->next
->next
;
8403 gfc_free_case_list (n
);
8410 /* See if there were overlapping cases. If the check returns NULL,
8411 there was overlap. In that case we don't do anything. If head
8412 is non-NULL, we prepend the DEFAULT case. The sorted list can
8413 then used during code generation for SELECT CASE constructs with
8414 a case expression of a CHARACTER type. */
8417 head
= check_case_overlap (head
);
8419 /* Prepend the default_case if it is there. */
8420 if (head
!= NULL
&& default_case
)
8422 default_case
->left
= NULL
;
8423 default_case
->right
= head
;
8424 head
->left
= default_case
;
8428 /* Eliminate dead blocks that may be the result if we've seen
8429 unreachable case labels for a block. */
8430 for (body
= code
; body
&& body
->block
; body
= body
->block
)
8432 if (body
->block
->ext
.block
.case_list
== NULL
)
8434 /* Cut the unreachable block from the code chain. */
8435 gfc_code
*c
= body
->block
;
8436 body
->block
= c
->block
;
8438 /* Kill the dead block, but not the blocks below it. */
8440 gfc_free_statements (c
);
8444 /* More than two cases is legal but insane for logical selects.
8445 Issue a warning for it. */
8446 if (warn_surprising
&& type
== BT_LOGICAL
&& ncases
> 2)
8447 gfc_warning (OPT_Wsurprising
,
8448 "Logical SELECT CASE block at %L has more that two cases",
8453 /* Check if a derived type is extensible. */
8456 gfc_type_is_extensible (gfc_symbol
*sym
)
8458 return !(sym
->attr
.is_bind_c
|| sym
->attr
.sequence
8459 || (sym
->attr
.is_class
8460 && sym
->components
->ts
.u
.derived
->attr
.unlimited_polymorphic
));
8465 resolve_types (gfc_namespace
*ns
);
8467 /* Resolve an associate-name: Resolve target and ensure the type-spec is
8468 correct as well as possibly the array-spec. */
8471 resolve_assoc_var (gfc_symbol
* sym
, bool resolve_target
)
8475 gcc_assert (sym
->assoc
);
8476 gcc_assert (sym
->attr
.flavor
== FL_VARIABLE
);
8478 /* If this is for SELECT TYPE, the target may not yet be set. In that
8479 case, return. Resolution will be called later manually again when
8481 target
= sym
->assoc
->target
;
8484 gcc_assert (!sym
->assoc
->dangling
);
8486 if (resolve_target
&& !gfc_resolve_expr (target
))
8489 /* For variable targets, we get some attributes from the target. */
8490 if (target
->expr_type
== EXPR_VARIABLE
)
8494 gcc_assert (target
->symtree
);
8495 tsym
= target
->symtree
->n
.sym
;
8497 sym
->attr
.asynchronous
= tsym
->attr
.asynchronous
;
8498 sym
->attr
.volatile_
= tsym
->attr
.volatile_
;
8500 sym
->attr
.target
= tsym
->attr
.target
8501 || gfc_expr_attr (target
).pointer
;
8502 if (is_subref_array (target
))
8503 sym
->attr
.subref_array_pointer
= 1;
8506 if (target
->expr_type
== EXPR_NULL
)
8508 gfc_error ("Selector at %L cannot be NULL()", &target
->where
);
8511 else if (target
->ts
.type
== BT_UNKNOWN
)
8513 gfc_error ("Selector at %L has no type", &target
->where
);
8517 /* Get type if this was not already set. Note that it can be
8518 some other type than the target in case this is a SELECT TYPE
8519 selector! So we must not update when the type is already there. */
8520 if (sym
->ts
.type
== BT_UNKNOWN
)
8521 sym
->ts
= target
->ts
;
8523 gcc_assert (sym
->ts
.type
!= BT_UNKNOWN
);
8525 /* See if this is a valid association-to-variable. */
8526 sym
->assoc
->variable
= (target
->expr_type
== EXPR_VARIABLE
8527 && !gfc_has_vector_subscript (target
));
8529 /* Finally resolve if this is an array or not. */
8530 if (sym
->attr
.dimension
&& target
->rank
== 0)
8532 /* primary.c makes the assumption that a reference to an associate
8533 name followed by a left parenthesis is an array reference. */
8534 if (sym
->ts
.type
!= BT_CHARACTER
)
8535 gfc_error ("Associate-name %qs at %L is used as array",
8536 sym
->name
, &sym
->declared_at
);
8537 sym
->attr
.dimension
= 0;
8542 /* We cannot deal with class selectors that need temporaries. */
8543 if (target
->ts
.type
== BT_CLASS
8544 && gfc_ref_needs_temporary_p (target
->ref
))
8546 gfc_error ("CLASS selector at %L needs a temporary which is not "
8547 "yet implemented", &target
->where
);
8551 if (target
->ts
.type
== BT_CLASS
)
8552 gfc_fix_class_refs (target
);
8554 if (target
->rank
!= 0)
8557 /* The rank may be incorrectly guessed at parsing, therefore make sure
8558 it is corrected now. */
8559 if (sym
->ts
.type
!= BT_CLASS
&& (!sym
->as
|| sym
->assoc
->rankguessed
))
8562 sym
->as
= gfc_get_array_spec ();
8564 as
->rank
= target
->rank
;
8565 as
->type
= AS_DEFERRED
;
8566 as
->corank
= gfc_get_corank (target
);
8567 sym
->attr
.dimension
= 1;
8568 if (as
->corank
!= 0)
8569 sym
->attr
.codimension
= 1;
8574 /* target's rank is 0, but the type of the sym is still array valued,
8575 which has to be corrected. */
8576 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)
8579 symbol_attribute attr
;
8580 /* The associated variable's type is still the array type
8581 correct this now. */
8582 gfc_typespec
*ts
= &target
->ts
;
8585 for (ref
= target
->ref
; ref
!= NULL
; ref
= ref
->next
)
8590 ts
= &ref
->u
.c
.component
->ts
;
8593 if (ts
->type
== BT_CLASS
)
8594 ts
= &ts
->u
.derived
->components
->ts
;
8600 /* Create a scalar instance of the current class type. Because the
8601 rank of a class array goes into its name, the type has to be
8602 rebuild. The alternative of (re-)setting just the attributes
8603 and as in the current type, destroys the type also in other
8607 sym
->ts
.type
= BT_CLASS
;
8608 attr
= CLASS_DATA (sym
)->attr
;
8610 attr
.associate_var
= 1;
8611 attr
.dimension
= attr
.codimension
= 0;
8612 attr
.class_pointer
= 1;
8613 if (!gfc_build_class_symbol (&sym
->ts
, &attr
, &as
))
8615 /* Make sure the _vptr is set. */
8616 c
= gfc_find_component (sym
->ts
.u
.derived
, "_vptr", true, true, NULL
);
8617 if (c
->ts
.u
.derived
== NULL
)
8618 c
->ts
.u
.derived
= gfc_find_derived_vtab (sym
->ts
.u
.derived
);
8619 CLASS_DATA (sym
)->attr
.pointer
= 1;
8620 CLASS_DATA (sym
)->attr
.class_pointer
= 1;
8621 gfc_set_sym_referenced (sym
->ts
.u
.derived
);
8622 gfc_commit_symbol (sym
->ts
.u
.derived
);
8623 /* _vptr now has the _vtab in it, change it to the _vtype. */
8624 if (c
->ts
.u
.derived
->attr
.vtab
)
8625 c
->ts
.u
.derived
= c
->ts
.u
.derived
->ts
.u
.derived
;
8626 c
->ts
.u
.derived
->ns
->types_resolved
= 0;
8627 resolve_types (c
->ts
.u
.derived
->ns
);
8631 /* Mark this as an associate variable. */
8632 sym
->attr
.associate_var
= 1;
8634 /* Fix up the type-spec for CHARACTER types. */
8635 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.select_type_temporary
)
8638 sym
->ts
.u
.cl
= target
->ts
.u
.cl
;
8640 if (!sym
->ts
.u
.cl
->length
&& !sym
->ts
.deferred
)
8642 if (target
->expr_type
== EXPR_CONSTANT
)
8643 sym
->ts
.u
.cl
->length
=
8644 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
8645 target
->value
.character
.length
);
8647 gfc_error ("Not Implemented: Associate target with type character"
8648 " and non-constant length at %L", &target
->where
);
8652 /* If the target is a good class object, so is the associate variable. */
8653 if (sym
->ts
.type
== BT_CLASS
&& gfc_expr_attr (target
).class_ok
)
8654 sym
->attr
.class_ok
= 1;
8658 /* Ensure that SELECT TYPE expressions have the correct rank and a full
8659 array reference, where necessary. The symbols are artificial and so
8660 the dimension attribute and arrayspec can also be set. In addition,
8661 sometimes the expr1 arrives as BT_DERIVED, when the symbol is BT_CLASS.
8662 This is corrected here as well.*/
8665 fixup_array_ref (gfc_expr
**expr1
, gfc_expr
*expr2
,
8666 int rank
, gfc_ref
*ref
)
8668 gfc_ref
*nref
= (*expr1
)->ref
;
8669 gfc_symbol
*sym1
= (*expr1
)->symtree
->n
.sym
;
8670 gfc_symbol
*sym2
= expr2
? expr2
->symtree
->n
.sym
: NULL
;
8671 (*expr1
)->rank
= rank
;
8672 if (sym1
->ts
.type
== BT_CLASS
)
8674 if ((*expr1
)->ts
.type
!= BT_CLASS
)
8675 (*expr1
)->ts
= sym1
->ts
;
8677 CLASS_DATA (sym1
)->attr
.dimension
= 1;
8678 if (CLASS_DATA (sym1
)->as
== NULL
&& sym2
)
8679 CLASS_DATA (sym1
)->as
8680 = gfc_copy_array_spec (CLASS_DATA (sym2
)->as
);
8684 sym1
->attr
.dimension
= 1;
8685 if (sym1
->as
== NULL
&& sym2
)
8686 sym1
->as
= gfc_copy_array_spec (sym2
->as
);
8689 for (; nref
; nref
= nref
->next
)
8690 if (nref
->next
== NULL
)
8693 if (ref
&& nref
&& nref
->type
!= REF_ARRAY
)
8694 nref
->next
= gfc_copy_ref (ref
);
8695 else if (ref
&& !nref
)
8696 (*expr1
)->ref
= gfc_copy_ref (ref
);
8701 build_loc_call (gfc_expr
*sym_expr
)
8704 loc_call
= gfc_get_expr ();
8705 loc_call
->expr_type
= EXPR_FUNCTION
;
8706 gfc_get_sym_tree ("loc", gfc_current_ns
, &loc_call
->symtree
, false);
8707 loc_call
->symtree
->n
.sym
->attr
.flavor
= FL_PROCEDURE
;
8708 loc_call
->symtree
->n
.sym
->attr
.intrinsic
= 1;
8709 loc_call
->symtree
->n
.sym
->result
= loc_call
->symtree
->n
.sym
;
8710 gfc_commit_symbol (loc_call
->symtree
->n
.sym
);
8711 loc_call
->ts
.type
= BT_INTEGER
;
8712 loc_call
->ts
.kind
= gfc_index_integer_kind
;
8713 loc_call
->value
.function
.isym
= gfc_intrinsic_function_by_id (GFC_ISYM_LOC
);
8714 loc_call
->value
.function
.actual
= gfc_get_actual_arglist ();
8715 loc_call
->value
.function
.actual
->expr
= sym_expr
;
8716 loc_call
->where
= sym_expr
->where
;
8720 /* Resolve a SELECT TYPE statement. */
8723 resolve_select_type (gfc_code
*code
, gfc_namespace
*old_ns
)
8725 gfc_symbol
*selector_type
;
8726 gfc_code
*body
, *new_st
, *if_st
, *tail
;
8727 gfc_code
*class_is
= NULL
, *default_case
= NULL
;
8730 char name
[GFC_MAX_SYMBOL_LEN
];
8734 gfc_ref
* ref
= NULL
;
8735 gfc_expr
*selector_expr
= NULL
;
8737 ns
= code
->ext
.block
.ns
;
8740 /* Check for F03:C813. */
8741 if (code
->expr1
->ts
.type
!= BT_CLASS
8742 && !(code
->expr2
&& code
->expr2
->ts
.type
== BT_CLASS
))
8744 gfc_error ("Selector shall be polymorphic in SELECT TYPE statement "
8745 "at %L", &code
->loc
);
8749 if (!code
->expr1
->symtree
->n
.sym
->attr
.class_ok
)
8754 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
8755 code
->expr1
->symtree
->n
.sym
->ts
= code
->expr2
->ts
;
8756 selector_type
= CLASS_DATA (code
->expr2
)->ts
.u
.derived
;
8758 if (code
->expr2
->rank
&& CLASS_DATA (code
->expr1
)->as
)
8759 CLASS_DATA (code
->expr1
)->as
->rank
= code
->expr2
->rank
;
8761 /* F2008: C803 The selector expression must not be coindexed. */
8762 if (gfc_is_coindexed (code
->expr2
))
8764 gfc_error ("Selector at %L must not be coindexed",
8765 &code
->expr2
->where
);
8772 selector_type
= CLASS_DATA (code
->expr1
)->ts
.u
.derived
;
8774 if (gfc_is_coindexed (code
->expr1
))
8776 gfc_error ("Selector at %L must not be coindexed",
8777 &code
->expr1
->where
);
8782 /* Loop over TYPE IS / CLASS IS cases. */
8783 for (body
= code
->block
; body
; body
= body
->block
)
8785 c
= body
->ext
.block
.case_list
;
8789 /* Check for repeated cases. */
8790 for (tail
= code
->block
; tail
; tail
= tail
->block
)
8792 gfc_case
*d
= tail
->ext
.block
.case_list
;
8796 if (c
->ts
.type
== d
->ts
.type
8797 && ((c
->ts
.type
== BT_DERIVED
8798 && c
->ts
.u
.derived
&& d
->ts
.u
.derived
8799 && !strcmp (c
->ts
.u
.derived
->name
,
8800 d
->ts
.u
.derived
->name
))
8801 || c
->ts
.type
== BT_UNKNOWN
8802 || (!(c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8803 && c
->ts
.kind
== d
->ts
.kind
)))
8805 gfc_error ("TYPE IS at %L overlaps with TYPE IS at %L",
8806 &c
->where
, &d
->where
);
8812 /* Check F03:C815. */
8813 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8814 && !selector_type
->attr
.unlimited_polymorphic
8815 && !gfc_type_is_extensible (c
->ts
.u
.derived
))
8817 gfc_error ("Derived type %qs at %L must be extensible",
8818 c
->ts
.u
.derived
->name
, &c
->where
);
8823 /* Check F03:C816. */
8824 if (c
->ts
.type
!= BT_UNKNOWN
&& !selector_type
->attr
.unlimited_polymorphic
8825 && ((c
->ts
.type
!= BT_DERIVED
&& c
->ts
.type
!= BT_CLASS
)
8826 || !gfc_type_is_extension_of (selector_type
, c
->ts
.u
.derived
)))
8828 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8829 gfc_error ("Derived type %qs at %L must be an extension of %qs",
8830 c
->ts
.u
.derived
->name
, &c
->where
, selector_type
->name
);
8832 gfc_error ("Unexpected intrinsic type %qs at %L",
8833 gfc_basic_typename (c
->ts
.type
), &c
->where
);
8838 /* Check F03:C814. */
8839 if (c
->ts
.type
== BT_CHARACTER
8840 && (c
->ts
.u
.cl
->length
!= NULL
|| c
->ts
.deferred
))
8842 gfc_error ("The type-spec at %L shall specify that each length "
8843 "type parameter is assumed", &c
->where
);
8848 /* Intercept the DEFAULT case. */
8849 if (c
->ts
.type
== BT_UNKNOWN
)
8851 /* Check F03:C818. */
8854 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8855 "by a second DEFAULT CASE at %L",
8856 &default_case
->ext
.block
.case_list
->where
, &c
->where
);
8861 default_case
= body
;
8868 /* Transform SELECT TYPE statement to BLOCK and associate selector to
8869 target if present. If there are any EXIT statements referring to the
8870 SELECT TYPE construct, this is no problem because the gfc_code
8871 reference stays the same and EXIT is equally possible from the BLOCK
8872 it is changed to. */
8873 code
->op
= EXEC_BLOCK
;
8876 gfc_association_list
* assoc
;
8878 assoc
= gfc_get_association_list ();
8879 assoc
->st
= code
->expr1
->symtree
;
8880 assoc
->target
= gfc_copy_expr (code
->expr2
);
8881 assoc
->target
->where
= code
->expr2
->where
;
8882 /* assoc->variable will be set by resolve_assoc_var. */
8884 code
->ext
.block
.assoc
= assoc
;
8885 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
8887 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
8890 code
->ext
.block
.assoc
= NULL
;
8892 /* Ensure that the selector rank and arrayspec are available to
8893 correct expressions in which they might be missing. */
8894 if (code
->expr2
&& code
->expr2
->rank
)
8896 rank
= code
->expr2
->rank
;
8897 for (ref
= code
->expr2
->ref
; ref
; ref
= ref
->next
)
8898 if (ref
->next
== NULL
)
8900 if (ref
&& ref
->type
== REF_ARRAY
)
8901 ref
= gfc_copy_ref (ref
);
8903 /* Fixup expr1 if necessary. */
8905 fixup_array_ref (&code
->expr1
, code
->expr2
, rank
, ref
);
8907 else if (code
->expr1
->rank
)
8909 rank
= code
->expr1
->rank
;
8910 for (ref
= code
->expr1
->ref
; ref
; ref
= ref
->next
)
8911 if (ref
->next
== NULL
)
8913 if (ref
&& ref
->type
== REF_ARRAY
)
8914 ref
= gfc_copy_ref (ref
);
8917 /* Add EXEC_SELECT to switch on type. */
8918 new_st
= gfc_get_code (code
->op
);
8919 new_st
->expr1
= code
->expr1
;
8920 new_st
->expr2
= code
->expr2
;
8921 new_st
->block
= code
->block
;
8922 code
->expr1
= code
->expr2
= NULL
;
8927 ns
->code
->next
= new_st
;
8929 code
->op
= EXEC_SELECT_TYPE
;
8931 /* Use the intrinsic LOC function to generate an integer expression
8932 for the vtable of the selector. Note that the rank of the selector
8933 expression has to be set to zero. */
8934 gfc_add_vptr_component (code
->expr1
);
8935 code
->expr1
->rank
= 0;
8936 code
->expr1
= build_loc_call (code
->expr1
);
8937 selector_expr
= code
->expr1
->value
.function
.actual
->expr
;
8939 /* Loop over TYPE IS / CLASS IS cases. */
8940 for (body
= code
->block
; body
; body
= body
->block
)
8944 c
= body
->ext
.block
.case_list
;
8946 /* Generate an index integer expression for address of the
8947 TYPE/CLASS vtable and store it in c->low. The hash expression
8948 is stored in c->high and is used to resolve intrinsic cases. */
8949 if (c
->ts
.type
!= BT_UNKNOWN
)
8951 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8953 vtab
= gfc_find_derived_vtab (c
->ts
.u
.derived
);
8955 c
->high
= gfc_get_int_expr (gfc_default_integer_kind
, NULL
,
8956 c
->ts
.u
.derived
->hash_value
);
8960 vtab
= gfc_find_vtab (&c
->ts
);
8961 gcc_assert (vtab
&& CLASS_DATA (vtab
)->initializer
);
8962 e
= CLASS_DATA (vtab
)->initializer
;
8963 c
->high
= gfc_copy_expr (e
);
8966 e
= gfc_lval_expr_from_sym (vtab
);
8967 c
->low
= build_loc_call (e
);
8972 /* Associate temporary to selector. This should only be done
8973 when this case is actually true, so build a new ASSOCIATE
8974 that does precisely this here (instead of using the
8977 if (c
->ts
.type
== BT_CLASS
)
8978 sprintf (name
, "__tmp_class_%s", c
->ts
.u
.derived
->name
);
8979 else if (c
->ts
.type
== BT_DERIVED
)
8980 sprintf (name
, "__tmp_type_%s", c
->ts
.u
.derived
->name
);
8981 else if (c
->ts
.type
== BT_CHARACTER
)
8983 HOST_WIDE_INT charlen
= 0;
8984 if (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
8985 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
8986 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
8987 snprintf (name
, sizeof (name
),
8988 "__tmp_%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
8989 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
8992 sprintf (name
, "__tmp_%s_%d", gfc_basic_typename (c
->ts
.type
),
8995 st
= gfc_find_symtree (ns
->sym_root
, name
);
8996 gcc_assert (st
->n
.sym
->assoc
);
8997 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
8998 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
8999 if (c
->ts
.type
!= BT_CLASS
&& c
->ts
.type
!= BT_UNKNOWN
)
9001 gfc_add_data_component (st
->n
.sym
->assoc
->target
);
9002 /* Fixup the target expression if necessary. */
9004 fixup_array_ref (&st
->n
.sym
->assoc
->target
, NULL
, rank
, ref
);
9007 new_st
= gfc_get_code (EXEC_BLOCK
);
9008 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9009 new_st
->ext
.block
.ns
->code
= body
->next
;
9010 body
->next
= new_st
;
9012 /* Chain in the new list only if it is marked as dangling. Otherwise
9013 there is a CASE label overlap and this is already used. Just ignore,
9014 the error is diagnosed elsewhere. */
9015 if (st
->n
.sym
->assoc
->dangling
)
9017 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9018 st
->n
.sym
->assoc
->dangling
= 0;
9021 resolve_assoc_var (st
->n
.sym
, false);
9024 /* Take out CLASS IS cases for separate treatment. */
9026 while (body
&& body
->block
)
9028 if (body
->block
->ext
.block
.case_list
->ts
.type
== BT_CLASS
)
9030 /* Add to class_is list. */
9031 if (class_is
== NULL
)
9033 class_is
= body
->block
;
9038 for (tail
= class_is
; tail
->block
; tail
= tail
->block
) ;
9039 tail
->block
= body
->block
;
9042 /* Remove from EXEC_SELECT list. */
9043 body
->block
= body
->block
->block
;
9056 /* Add a default case to hold the CLASS IS cases. */
9057 for (tail
= code
; tail
->block
; tail
= tail
->block
) ;
9058 tail
->block
= gfc_get_code (EXEC_SELECT_TYPE
);
9060 tail
->ext
.block
.case_list
= gfc_get_case ();
9061 tail
->ext
.block
.case_list
->ts
.type
= BT_UNKNOWN
;
9063 default_case
= tail
;
9066 /* More than one CLASS IS block? */
9067 if (class_is
->block
)
9071 /* Sort CLASS IS blocks by extension level. */
9075 for (c1
= &class_is
; (*c1
) && (*c1
)->block
; c1
= &((*c1
)->block
))
9078 /* F03:C817 (check for doubles). */
9079 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->hash_value
9080 == c2
->ext
.block
.case_list
->ts
.u
.derived
->hash_value
)
9082 gfc_error ("Double CLASS IS block in SELECT TYPE "
9084 &c2
->ext
.block
.case_list
->where
);
9087 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
9088 < c2
->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
)
9091 (*c1
)->block
= c2
->block
;
9101 /* Generate IF chain. */
9102 if_st
= gfc_get_code (EXEC_IF
);
9104 for (body
= class_is
; body
; body
= body
->block
)
9106 new_st
->block
= gfc_get_code (EXEC_IF
);
9107 new_st
= new_st
->block
;
9108 /* Set up IF condition: Call _gfortran_is_extension_of. */
9109 new_st
->expr1
= gfc_get_expr ();
9110 new_st
->expr1
->expr_type
= EXPR_FUNCTION
;
9111 new_st
->expr1
->ts
.type
= BT_LOGICAL
;
9112 new_st
->expr1
->ts
.kind
= 4;
9113 new_st
->expr1
->value
.function
.name
= gfc_get_string (PREFIX ("is_extension_of"));
9114 new_st
->expr1
->value
.function
.isym
= XCNEW (gfc_intrinsic_sym
);
9115 new_st
->expr1
->value
.function
.isym
->id
= GFC_ISYM_EXTENDS_TYPE_OF
;
9116 /* Set up arguments. */
9117 new_st
->expr1
->value
.function
.actual
= gfc_get_actual_arglist ();
9118 new_st
->expr1
->value
.function
.actual
->expr
= gfc_get_variable_expr (selector_expr
->symtree
);
9119 new_st
->expr1
->value
.function
.actual
->expr
->where
= code
->loc
;
9120 new_st
->expr1
->where
= code
->loc
;
9121 gfc_add_vptr_component (new_st
->expr1
->value
.function
.actual
->expr
);
9122 vtab
= gfc_find_derived_vtab (body
->ext
.block
.case_list
->ts
.u
.derived
);
9123 st
= gfc_find_symtree (vtab
->ns
->sym_root
, vtab
->name
);
9124 new_st
->expr1
->value
.function
.actual
->next
= gfc_get_actual_arglist ();
9125 new_st
->expr1
->value
.function
.actual
->next
->expr
= gfc_get_variable_expr (st
);
9126 new_st
->expr1
->value
.function
.actual
->next
->expr
->where
= code
->loc
;
9127 new_st
->next
= body
->next
;
9129 if (default_case
->next
)
9131 new_st
->block
= gfc_get_code (EXEC_IF
);
9132 new_st
= new_st
->block
;
9133 new_st
->next
= default_case
->next
;
9136 /* Replace CLASS DEFAULT code by the IF chain. */
9137 default_case
->next
= if_st
;
9140 /* Resolve the internal code. This can not be done earlier because
9141 it requires that the sym->assoc of selectors is set already. */
9142 gfc_current_ns
= ns
;
9143 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9144 gfc_current_ns
= old_ns
;
9151 /* Resolve a transfer statement. This is making sure that:
9152 -- a derived type being transferred has only non-pointer components
9153 -- a derived type being transferred doesn't have private components, unless
9154 it's being transferred from the module where the type was defined
9155 -- we're not trying to transfer a whole assumed size array. */
9158 resolve_transfer (gfc_code
*code
)
9161 gfc_symbol
*sym
, *derived
;
9165 bool formatted
= false;
9166 gfc_dt
*dt
= code
->ext
.dt
;
9167 gfc_symbol
*dtio_sub
= NULL
;
9171 while (exp
!= NULL
&& exp
->expr_type
== EXPR_OP
9172 && exp
->value
.op
.op
== INTRINSIC_PARENTHESES
)
9173 exp
= exp
->value
.op
.op1
;
9175 if (exp
&& exp
->expr_type
== EXPR_NULL
9178 gfc_error ("Invalid context for NULL () intrinsic at %L",
9183 if (exp
== NULL
|| (exp
->expr_type
!= EXPR_VARIABLE
9184 && exp
->expr_type
!= EXPR_FUNCTION
9185 && exp
->expr_type
!= EXPR_STRUCTURE
))
9188 /* If we are reading, the variable will be changed. Note that
9189 code->ext.dt may be NULL if the TRANSFER is related to
9190 an INQUIRE statement -- but in this case, we are not reading, either. */
9191 if (dt
&& dt
->dt_io_kind
->value
.iokind
== M_READ
9192 && !gfc_check_vardef_context (exp
, false, false, false,
9196 ts
= exp
->expr_type
== EXPR_STRUCTURE
? &exp
->ts
: &exp
->symtree
->n
.sym
->ts
;
9198 /* Go to actual component transferred. */
9199 for (ref
= exp
->ref
; ref
; ref
= ref
->next
)
9200 if (ref
->type
== REF_COMPONENT
)
9201 ts
= &ref
->u
.c
.component
->ts
;
9203 if (dt
&& dt
->dt_io_kind
->value
.iokind
!= M_INQUIRE
9204 && (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
))
9206 if (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
)
9207 derived
= ts
->u
.derived
;
9209 derived
= ts
->u
.derived
->components
->ts
.u
.derived
;
9211 /* Determine when to use the formatted DTIO procedure. */
9212 if (dt
&& (dt
->format_expr
|| dt
->format_label
))
9215 write
= dt
->dt_io_kind
->value
.iokind
== M_WRITE
9216 || dt
->dt_io_kind
->value
.iokind
== M_PRINT
;
9217 dtio_sub
= gfc_find_specific_dtio_proc (derived
, write
, formatted
);
9219 if (dtio_sub
!= NULL
&& exp
->expr_type
== EXPR_VARIABLE
)
9222 sym
= exp
->symtree
->n
.sym
->ns
->proc_name
;
9223 /* Check to see if this is a nested DTIO call, with the
9224 dummy as the io-list object. */
9225 if (sym
&& sym
== dtio_sub
&& sym
->formal
9226 && sym
->formal
->sym
== exp
->symtree
->n
.sym
9227 && exp
->ref
== NULL
)
9229 if (!sym
->attr
.recursive
)
9231 gfc_error ("DTIO %s procedure at %L must be recursive",
9232 sym
->name
, &sym
->declared_at
);
9239 if (ts
->type
== BT_CLASS
&& dtio_sub
== NULL
)
9241 gfc_error ("Data transfer element at %L cannot be polymorphic unless "
9242 "it is processed by a defined input/output procedure",
9247 if (ts
->type
== BT_DERIVED
)
9249 /* Check that transferred derived type doesn't contain POINTER
9250 components unless it is processed by a defined input/output
9252 if (ts
->u
.derived
->attr
.pointer_comp
&& dtio_sub
== NULL
)
9254 gfc_error ("Data transfer element at %L cannot have POINTER "
9255 "components unless it is processed by a defined "
9256 "input/output procedure", &code
->loc
);
9261 if (ts
->u
.derived
->attr
.proc_pointer_comp
)
9263 gfc_error ("Data transfer element at %L cannot have "
9264 "procedure pointer components", &code
->loc
);
9268 if (ts
->u
.derived
->attr
.alloc_comp
&& dtio_sub
== NULL
)
9270 gfc_error ("Data transfer element at %L cannot have ALLOCATABLE "
9271 "components unless it is processed by a defined "
9272 "input/output procedure", &code
->loc
);
9276 /* C_PTR and C_FUNPTR have private components which means they can not
9277 be printed. However, if -std=gnu and not -pedantic, allow
9278 the component to be printed to help debugging. */
9279 if (ts
->u
.derived
->ts
.f90_type
== BT_VOID
)
9281 if (!gfc_notify_std (GFC_STD_GNU
, "Data transfer element at %L "
9282 "cannot have PRIVATE components", &code
->loc
))
9285 else if (derived_inaccessible (ts
->u
.derived
) && dtio_sub
== NULL
)
9287 gfc_error ("Data transfer element at %L cannot have "
9288 "PRIVATE components unless it is processed by "
9289 "a defined input/output procedure", &code
->loc
);
9294 if (exp
->expr_type
== EXPR_STRUCTURE
)
9297 sym
= exp
->symtree
->n
.sym
;
9299 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SIZE
&& exp
->ref
9300 && exp
->ref
->type
== REF_ARRAY
&& exp
->ref
->u
.ar
.type
== AR_FULL
)
9302 gfc_error ("Data transfer element at %L cannot be a full reference to "
9303 "an assumed-size array", &code
->loc
);
9307 if (async_io_dt
&& exp
->expr_type
== EXPR_VARIABLE
)
9308 exp
->symtree
->n
.sym
->attr
.asynchronous
= 1;
9312 /*********** Toplevel code resolution subroutines ***********/
9314 /* Find the set of labels that are reachable from this block. We also
9315 record the last statement in each block. */
9318 find_reachable_labels (gfc_code
*block
)
9325 cs_base
->reachable_labels
= bitmap_alloc (&labels_obstack
);
9327 /* Collect labels in this block. We don't keep those corresponding
9328 to END {IF|SELECT}, these are checked in resolve_branch by going
9329 up through the code_stack. */
9330 for (c
= block
; c
; c
= c
->next
)
9332 if (c
->here
&& c
->op
!= EXEC_END_NESTED_BLOCK
)
9333 bitmap_set_bit (cs_base
->reachable_labels
, c
->here
->value
);
9336 /* Merge with labels from parent block. */
9339 gcc_assert (cs_base
->prev
->reachable_labels
);
9340 bitmap_ior_into (cs_base
->reachable_labels
,
9341 cs_base
->prev
->reachable_labels
);
9347 resolve_lock_unlock_event (gfc_code
*code
)
9349 if (code
->expr1
->expr_type
== EXPR_FUNCTION
9350 && code
->expr1
->value
.function
.isym
9351 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
9352 remove_caf_get_intrinsic (code
->expr1
);
9354 if ((code
->op
== EXEC_LOCK
|| code
->op
== EXEC_UNLOCK
)
9355 && (code
->expr1
->ts
.type
!= BT_DERIVED
9356 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9357 || code
->expr1
->ts
.u
.derived
->from_intmod
!= INTMOD_ISO_FORTRAN_ENV
9358 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
!= ISOFORTRAN_LOCK_TYPE
9359 || code
->expr1
->rank
!= 0
9360 || (!gfc_is_coarray (code
->expr1
) &&
9361 !gfc_is_coindexed (code
->expr1
))))
9362 gfc_error ("Lock variable at %L must be a scalar of type LOCK_TYPE",
9363 &code
->expr1
->where
);
9364 else if ((code
->op
== EXEC_EVENT_POST
|| code
->op
== EXEC_EVENT_WAIT
)
9365 && (code
->expr1
->ts
.type
!= BT_DERIVED
9366 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9367 || code
->expr1
->ts
.u
.derived
->from_intmod
9368 != INTMOD_ISO_FORTRAN_ENV
9369 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
9370 != ISOFORTRAN_EVENT_TYPE
9371 || code
->expr1
->rank
!= 0))
9372 gfc_error ("Event variable at %L must be a scalar of type EVENT_TYPE",
9373 &code
->expr1
->where
);
9374 else if (code
->op
== EXEC_EVENT_POST
&& !gfc_is_coarray (code
->expr1
)
9375 && !gfc_is_coindexed (code
->expr1
))
9376 gfc_error ("Event variable argument at %L must be a coarray or coindexed",
9377 &code
->expr1
->where
);
9378 else if (code
->op
== EXEC_EVENT_WAIT
&& !gfc_is_coarray (code
->expr1
))
9379 gfc_error ("Event variable argument at %L must be a coarray but not "
9380 "coindexed", &code
->expr1
->where
);
9384 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9385 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9386 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9387 &code
->expr2
->where
);
9390 && !gfc_check_vardef_context (code
->expr2
, false, false, false,
9391 _("STAT variable")))
9396 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9397 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9398 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9399 &code
->expr3
->where
);
9402 && !gfc_check_vardef_context (code
->expr3
, false, false, false,
9403 _("ERRMSG variable")))
9406 /* Check for LOCK the ACQUIRED_LOCK. */
9407 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9408 && (code
->expr4
->ts
.type
!= BT_LOGICAL
|| code
->expr4
->rank
!= 0
9409 || code
->expr4
->expr_type
!= EXPR_VARIABLE
))
9410 gfc_error ("ACQUIRED_LOCK= argument at %L must be a scalar LOGICAL "
9411 "variable", &code
->expr4
->where
);
9413 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9414 && !gfc_check_vardef_context (code
->expr4
, false, false, false,
9415 _("ACQUIRED_LOCK variable")))
9418 /* Check for EVENT WAIT the UNTIL_COUNT. */
9419 if (code
->op
== EXEC_EVENT_WAIT
&& code
->expr4
)
9421 if (!gfc_resolve_expr (code
->expr4
) || code
->expr4
->ts
.type
!= BT_INTEGER
9422 || code
->expr4
->rank
!= 0)
9423 gfc_error ("UNTIL_COUNT= argument at %L must be a scalar INTEGER "
9424 "expression", &code
->expr4
->where
);
9430 resolve_critical (gfc_code
*code
)
9432 gfc_symtree
*symtree
;
9433 gfc_symbol
*lock_type
;
9434 char name
[GFC_MAX_SYMBOL_LEN
];
9435 static int serial
= 0;
9437 if (flag_coarray
!= GFC_FCOARRAY_LIB
)
9440 symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
9441 GFC_PREFIX ("lock_type"));
9443 lock_type
= symtree
->n
.sym
;
9446 if (gfc_get_sym_tree (GFC_PREFIX ("lock_type"), gfc_current_ns
, &symtree
,
9449 lock_type
= symtree
->n
.sym
;
9450 lock_type
->attr
.flavor
= FL_DERIVED
;
9451 lock_type
->attr
.zero_comp
= 1;
9452 lock_type
->from_intmod
= INTMOD_ISO_FORTRAN_ENV
;
9453 lock_type
->intmod_sym_id
= ISOFORTRAN_LOCK_TYPE
;
9456 sprintf(name
, GFC_PREFIX ("lock_var") "%d",serial
++);
9457 if (gfc_get_sym_tree (name
, gfc_current_ns
, &symtree
, false) != 0)
9460 code
->resolved_sym
= symtree
->n
.sym
;
9461 symtree
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
9462 symtree
->n
.sym
->attr
.referenced
= 1;
9463 symtree
->n
.sym
->attr
.artificial
= 1;
9464 symtree
->n
.sym
->attr
.codimension
= 1;
9465 symtree
->n
.sym
->ts
.type
= BT_DERIVED
;
9466 symtree
->n
.sym
->ts
.u
.derived
= lock_type
;
9467 symtree
->n
.sym
->as
= gfc_get_array_spec ();
9468 symtree
->n
.sym
->as
->corank
= 1;
9469 symtree
->n
.sym
->as
->type
= AS_EXPLICIT
;
9470 symtree
->n
.sym
->as
->cotype
= AS_EXPLICIT
;
9471 symtree
->n
.sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
,
9473 gfc_commit_symbols();
9478 resolve_sync (gfc_code
*code
)
9480 /* Check imageset. The * case matches expr1 == NULL. */
9483 if (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
> 1)
9484 gfc_error ("Imageset argument at %L must be a scalar or rank-1 "
9485 "INTEGER expression", &code
->expr1
->where
);
9486 if (code
->expr1
->expr_type
== EXPR_CONSTANT
&& code
->expr1
->rank
== 0
9487 && mpz_cmp_si (code
->expr1
->value
.integer
, 1) < 0)
9488 gfc_error ("Imageset argument at %L must between 1 and num_images()",
9489 &code
->expr1
->where
);
9490 else if (code
->expr1
->expr_type
== EXPR_ARRAY
9491 && gfc_simplify_expr (code
->expr1
, 0))
9493 gfc_constructor
*cons
;
9494 cons
= gfc_constructor_first (code
->expr1
->value
.constructor
);
9495 for (; cons
; cons
= gfc_constructor_next (cons
))
9496 if (cons
->expr
->expr_type
== EXPR_CONSTANT
9497 && mpz_cmp_si (cons
->expr
->value
.integer
, 1) < 0)
9498 gfc_error ("Imageset argument at %L must between 1 and "
9499 "num_images()", &cons
->expr
->where
);
9505 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9506 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9507 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9508 &code
->expr2
->where
);
9512 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9513 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9514 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9515 &code
->expr3
->where
);
9519 /* Given a branch to a label, see if the branch is conforming.
9520 The code node describes where the branch is located. */
9523 resolve_branch (gfc_st_label
*label
, gfc_code
*code
)
9530 /* Step one: is this a valid branching target? */
9532 if (label
->defined
== ST_LABEL_UNKNOWN
)
9534 gfc_error ("Label %d referenced at %L is never defined", label
->value
,
9539 if (label
->defined
!= ST_LABEL_TARGET
&& label
->defined
!= ST_LABEL_DO_TARGET
)
9541 gfc_error ("Statement at %L is not a valid branch target statement "
9542 "for the branch statement at %L", &label
->where
, &code
->loc
);
9546 /* Step two: make sure this branch is not a branch to itself ;-) */
9548 if (code
->here
== label
)
9551 "Branch at %L may result in an infinite loop", &code
->loc
);
9555 /* Step three: See if the label is in the same block as the
9556 branching statement. The hard work has been done by setting up
9557 the bitmap reachable_labels. */
9559 if (bitmap_bit_p (cs_base
->reachable_labels
, label
->value
))
9561 /* Check now whether there is a CRITICAL construct; if so, check
9562 whether the label is still visible outside of the CRITICAL block,
9563 which is invalid. */
9564 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9566 if (stack
->current
->op
== EXEC_CRITICAL
9567 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9568 gfc_error ("GOTO statement at %L leaves CRITICAL construct for "
9569 "label at %L", &code
->loc
, &label
->where
);
9570 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
9571 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9572 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct "
9573 "for label at %L", &code
->loc
, &label
->where
);
9579 /* Step four: If we haven't found the label in the bitmap, it may
9580 still be the label of the END of the enclosing block, in which
9581 case we find it by going up the code_stack. */
9583 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9585 if (stack
->current
->next
&& stack
->current
->next
->here
== label
)
9587 if (stack
->current
->op
== EXEC_CRITICAL
)
9589 /* Note: A label at END CRITICAL does not leave the CRITICAL
9590 construct as END CRITICAL is still part of it. */
9591 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
9592 " at %L", &code
->loc
, &label
->where
);
9595 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
)
9597 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct for "
9598 "label at %L", &code
->loc
, &label
->where
);
9605 gcc_assert (stack
->current
->next
->op
== EXEC_END_NESTED_BLOCK
);
9609 /* The label is not in an enclosing block, so illegal. This was
9610 allowed in Fortran 66, so we allow it as extension. No
9611 further checks are necessary in this case. */
9612 gfc_notify_std (GFC_STD_LEGACY
, "Label at %L is not in the same block "
9613 "as the GOTO statement at %L", &label
->where
,
9619 /* Check whether EXPR1 has the same shape as EXPR2. */
9622 resolve_where_shape (gfc_expr
*expr1
, gfc_expr
*expr2
)
9624 mpz_t shape
[GFC_MAX_DIMENSIONS
];
9625 mpz_t shape2
[GFC_MAX_DIMENSIONS
];
9626 bool result
= false;
9629 /* Compare the rank. */
9630 if (expr1
->rank
!= expr2
->rank
)
9633 /* Compare the size of each dimension. */
9634 for (i
=0; i
<expr1
->rank
; i
++)
9636 if (!gfc_array_dimen_size (expr1
, i
, &shape
[i
]))
9639 if (!gfc_array_dimen_size (expr2
, i
, &shape2
[i
]))
9642 if (mpz_cmp (shape
[i
], shape2
[i
]))
9646 /* When either of the two expression is an assumed size array, we
9647 ignore the comparison of dimension sizes. */
9652 gfc_clear_shape (shape
, i
);
9653 gfc_clear_shape (shape2
, i
);
9658 /* Check whether a WHERE assignment target or a WHERE mask expression
9659 has the same shape as the outmost WHERE mask expression. */
9662 resolve_where (gfc_code
*code
, gfc_expr
*mask
)
9668 cblock
= code
->block
;
9670 /* Store the first WHERE mask-expr of the WHERE statement or construct.
9671 In case of nested WHERE, only the outmost one is stored. */
9672 if (mask
== NULL
) /* outmost WHERE */
9674 else /* inner WHERE */
9681 /* Check if the mask-expr has a consistent shape with the
9682 outmost WHERE mask-expr. */
9683 if (!resolve_where_shape (cblock
->expr1
, e
))
9684 gfc_error ("WHERE mask at %L has inconsistent shape",
9685 &cblock
->expr1
->where
);
9688 /* the assignment statement of a WHERE statement, or the first
9689 statement in where-body-construct of a WHERE construct */
9690 cnext
= cblock
->next
;
9695 /* WHERE assignment statement */
9698 /* Check shape consistent for WHERE assignment target. */
9699 if (e
&& !resolve_where_shape (cnext
->expr1
, e
))
9700 gfc_error ("WHERE assignment target at %L has "
9701 "inconsistent shape", &cnext
->expr1
->where
);
9705 case EXEC_ASSIGN_CALL
:
9706 resolve_call (cnext
);
9707 if (!cnext
->resolved_sym
->attr
.elemental
)
9708 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9709 &cnext
->ext
.actual
->expr
->where
);
9712 /* WHERE or WHERE construct is part of a where-body-construct */
9714 resolve_where (cnext
, e
);
9718 gfc_error ("Unsupported statement inside WHERE at %L",
9721 /* the next statement within the same where-body-construct */
9722 cnext
= cnext
->next
;
9724 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
9725 cblock
= cblock
->block
;
9730 /* Resolve assignment in FORALL construct.
9731 NVAR is the number of FORALL index variables, and VAR_EXPR records the
9732 FORALL index variables. */
9735 gfc_resolve_assign_in_forall (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
9739 for (n
= 0; n
< nvar
; n
++)
9741 gfc_symbol
*forall_index
;
9743 forall_index
= var_expr
[n
]->symtree
->n
.sym
;
9745 /* Check whether the assignment target is one of the FORALL index
9747 if ((code
->expr1
->expr_type
== EXPR_VARIABLE
)
9748 && (code
->expr1
->symtree
->n
.sym
== forall_index
))
9749 gfc_error ("Assignment to a FORALL index variable at %L",
9750 &code
->expr1
->where
);
9753 /* If one of the FORALL index variables doesn't appear in the
9754 assignment variable, then there could be a many-to-one
9755 assignment. Emit a warning rather than an error because the
9756 mask could be resolving this problem. */
9757 if (!find_forall_index (code
->expr1
, forall_index
, 0))
9758 gfc_warning (0, "The FORALL with index %qs is not used on the "
9759 "left side of the assignment at %L and so might "
9760 "cause multiple assignment to this object",
9761 var_expr
[n
]->symtree
->name
, &code
->expr1
->where
);
9767 /* Resolve WHERE statement in FORALL construct. */
9770 gfc_resolve_where_code_in_forall (gfc_code
*code
, int nvar
,
9771 gfc_expr
**var_expr
)
9776 cblock
= code
->block
;
9779 /* the assignment statement of a WHERE statement, or the first
9780 statement in where-body-construct of a WHERE construct */
9781 cnext
= cblock
->next
;
9786 /* WHERE assignment statement */
9788 gfc_resolve_assign_in_forall (cnext
, nvar
, var_expr
);
9791 /* WHERE operator assignment statement */
9792 case EXEC_ASSIGN_CALL
:
9793 resolve_call (cnext
);
9794 if (!cnext
->resolved_sym
->attr
.elemental
)
9795 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9796 &cnext
->ext
.actual
->expr
->where
);
9799 /* WHERE or WHERE construct is part of a where-body-construct */
9801 gfc_resolve_where_code_in_forall (cnext
, nvar
, var_expr
);
9805 gfc_error ("Unsupported statement inside WHERE at %L",
9808 /* the next statement within the same where-body-construct */
9809 cnext
= cnext
->next
;
9811 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
9812 cblock
= cblock
->block
;
9817 /* Traverse the FORALL body to check whether the following errors exist:
9818 1. For assignment, check if a many-to-one assignment happens.
9819 2. For WHERE statement, check the WHERE body to see if there is any
9820 many-to-one assignment. */
9823 gfc_resolve_forall_body (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
9827 c
= code
->block
->next
;
9833 case EXEC_POINTER_ASSIGN
:
9834 gfc_resolve_assign_in_forall (c
, nvar
, var_expr
);
9837 case EXEC_ASSIGN_CALL
:
9841 /* Because the gfc_resolve_blocks() will handle the nested FORALL,
9842 there is no need to handle it here. */
9846 gfc_resolve_where_code_in_forall(c
, nvar
, var_expr
);
9851 /* The next statement in the FORALL body. */
9857 /* Counts the number of iterators needed inside a forall construct, including
9858 nested forall constructs. This is used to allocate the needed memory
9859 in gfc_resolve_forall. */
9862 gfc_count_forall_iterators (gfc_code
*code
)
9864 int max_iters
, sub_iters
, current_iters
;
9865 gfc_forall_iterator
*fa
;
9867 gcc_assert(code
->op
== EXEC_FORALL
);
9871 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
9874 code
= code
->block
->next
;
9878 if (code
->op
== EXEC_FORALL
)
9880 sub_iters
= gfc_count_forall_iterators (code
);
9881 if (sub_iters
> max_iters
)
9882 max_iters
= sub_iters
;
9887 return current_iters
+ max_iters
;
9891 /* Given a FORALL construct, first resolve the FORALL iterator, then call
9892 gfc_resolve_forall_body to resolve the FORALL body. */
9895 gfc_resolve_forall (gfc_code
*code
, gfc_namespace
*ns
, int forall_save
)
9897 static gfc_expr
**var_expr
;
9898 static int total_var
= 0;
9899 static int nvar
= 0;
9900 int i
, old_nvar
, tmp
;
9901 gfc_forall_iterator
*fa
;
9905 /* Start to resolve a FORALL construct */
9906 if (forall_save
== 0)
9908 /* Count the total number of FORALL indices in the nested FORALL
9909 construct in order to allocate the VAR_EXPR with proper size. */
9910 total_var
= gfc_count_forall_iterators (code
);
9912 /* Allocate VAR_EXPR with NUMBER_OF_FORALL_INDEX elements. */
9913 var_expr
= XCNEWVEC (gfc_expr
*, total_var
);
9916 /* The information about FORALL iterator, including FORALL indices start, end
9917 and stride. An outer FORALL indice cannot appear in start, end or stride. */
9918 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
9920 /* Fortran 20008: C738 (R753). */
9921 if (fa
->var
->ref
&& fa
->var
->ref
->type
== REF_ARRAY
)
9923 gfc_error ("FORALL index-name at %L must be a scalar variable "
9924 "of type integer", &fa
->var
->where
);
9928 /* Check if any outer FORALL index name is the same as the current
9930 for (i
= 0; i
< nvar
; i
++)
9932 if (fa
->var
->symtree
->n
.sym
== var_expr
[i
]->symtree
->n
.sym
)
9933 gfc_error ("An outer FORALL construct already has an index "
9934 "with this name %L", &fa
->var
->where
);
9937 /* Record the current FORALL index. */
9938 var_expr
[nvar
] = gfc_copy_expr (fa
->var
);
9942 /* No memory leak. */
9943 gcc_assert (nvar
<= total_var
);
9946 /* Resolve the FORALL body. */
9947 gfc_resolve_forall_body (code
, nvar
, var_expr
);
9949 /* May call gfc_resolve_forall to resolve the inner FORALL loop. */
9950 gfc_resolve_blocks (code
->block
, ns
);
9954 /* Free only the VAR_EXPRs allocated in this frame. */
9955 for (i
= nvar
; i
< tmp
; i
++)
9956 gfc_free_expr (var_expr
[i
]);
9960 /* We are in the outermost FORALL construct. */
9961 gcc_assert (forall_save
== 0);
9963 /* VAR_EXPR is not needed any more. */
9970 /* Resolve a BLOCK construct statement. */
9973 resolve_block_construct (gfc_code
* code
)
9975 /* Resolve the BLOCK's namespace. */
9976 gfc_resolve (code
->ext
.block
.ns
);
9978 /* For an ASSOCIATE block, the associations (and their targets) are already
9979 resolved during resolve_symbol. */
9983 /* Resolve lists of blocks found in IF, SELECT CASE, WHERE, FORALL, GOTO and
9987 gfc_resolve_blocks (gfc_code
*b
, gfc_namespace
*ns
)
9991 for (; b
; b
= b
->block
)
9993 t
= gfc_resolve_expr (b
->expr1
);
9994 if (!gfc_resolve_expr (b
->expr2
))
10000 if (t
&& b
->expr1
!= NULL
10001 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
!= 0))
10002 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
10008 && b
->expr1
!= NULL
10009 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
== 0))
10010 gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
10015 resolve_branch (b
->label1
, b
);
10019 resolve_block_construct (b
);
10023 case EXEC_SELECT_TYPE
:
10026 case EXEC_DO_WHILE
:
10027 case EXEC_DO_CONCURRENT
:
10028 case EXEC_CRITICAL
:
10031 case EXEC_IOLENGTH
:
10035 case EXEC_OMP_ATOMIC
:
10036 case EXEC_OACC_ATOMIC
:
10038 gfc_omp_atomic_op aop
10039 = (gfc_omp_atomic_op
) (b
->ext
.omp_atomic
& GFC_OMP_ATOMIC_MASK
);
10041 /* Verify this before calling gfc_resolve_code, which might
10043 gcc_assert (b
->next
&& b
->next
->op
== EXEC_ASSIGN
);
10044 gcc_assert (((aop
!= GFC_OMP_ATOMIC_CAPTURE
)
10045 && b
->next
->next
== NULL
)
10046 || ((aop
== GFC_OMP_ATOMIC_CAPTURE
)
10047 && b
->next
->next
!= NULL
10048 && b
->next
->next
->op
== EXEC_ASSIGN
10049 && b
->next
->next
->next
== NULL
));
10053 case EXEC_OACC_PARALLEL_LOOP
:
10054 case EXEC_OACC_PARALLEL
:
10055 case EXEC_OACC_KERNELS_LOOP
:
10056 case EXEC_OACC_KERNELS
:
10057 case EXEC_OACC_DATA
:
10058 case EXEC_OACC_HOST_DATA
:
10059 case EXEC_OACC_LOOP
:
10060 case EXEC_OACC_UPDATE
:
10061 case EXEC_OACC_WAIT
:
10062 case EXEC_OACC_CACHE
:
10063 case EXEC_OACC_ENTER_DATA
:
10064 case EXEC_OACC_EXIT_DATA
:
10065 case EXEC_OACC_ROUTINE
:
10066 case EXEC_OMP_CRITICAL
:
10067 case EXEC_OMP_DISTRIBUTE
:
10068 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
10069 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
10070 case EXEC_OMP_DISTRIBUTE_SIMD
:
10072 case EXEC_OMP_DO_SIMD
:
10073 case EXEC_OMP_MASTER
:
10074 case EXEC_OMP_ORDERED
:
10075 case EXEC_OMP_PARALLEL
:
10076 case EXEC_OMP_PARALLEL_DO
:
10077 case EXEC_OMP_PARALLEL_DO_SIMD
:
10078 case EXEC_OMP_PARALLEL_SECTIONS
:
10079 case EXEC_OMP_PARALLEL_WORKSHARE
:
10080 case EXEC_OMP_SECTIONS
:
10081 case EXEC_OMP_SIMD
:
10082 case EXEC_OMP_SINGLE
:
10083 case EXEC_OMP_TARGET
:
10084 case EXEC_OMP_TARGET_DATA
:
10085 case EXEC_OMP_TARGET_ENTER_DATA
:
10086 case EXEC_OMP_TARGET_EXIT_DATA
:
10087 case EXEC_OMP_TARGET_PARALLEL
:
10088 case EXEC_OMP_TARGET_PARALLEL_DO
:
10089 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
10090 case EXEC_OMP_TARGET_SIMD
:
10091 case EXEC_OMP_TARGET_TEAMS
:
10092 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
10093 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10094 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10095 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
10096 case EXEC_OMP_TARGET_UPDATE
:
10097 case EXEC_OMP_TASK
:
10098 case EXEC_OMP_TASKGROUP
:
10099 case EXEC_OMP_TASKLOOP
:
10100 case EXEC_OMP_TASKLOOP_SIMD
:
10101 case EXEC_OMP_TASKWAIT
:
10102 case EXEC_OMP_TASKYIELD
:
10103 case EXEC_OMP_TEAMS
:
10104 case EXEC_OMP_TEAMS_DISTRIBUTE
:
10105 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10106 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10107 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
10108 case EXEC_OMP_WORKSHARE
:
10112 gfc_internal_error ("gfc_resolve_blocks(): Bad block type");
10115 gfc_resolve_code (b
->next
, ns
);
10120 /* Does everything to resolve an ordinary assignment. Returns true
10121 if this is an interface assignment. */
10123 resolve_ordinary_assign (gfc_code
*code
, gfc_namespace
*ns
)
10130 symbol_attribute attr
;
10132 if (gfc_extend_assign (code
, ns
))
10136 if (code
->op
== EXEC_ASSIGN_CALL
)
10138 lhs
= code
->ext
.actual
->expr
;
10139 rhsptr
= &code
->ext
.actual
->next
->expr
;
10143 gfc_actual_arglist
* args
;
10144 gfc_typebound_proc
* tbp
;
10146 gcc_assert (code
->op
== EXEC_COMPCALL
);
10148 args
= code
->expr1
->value
.compcall
.actual
;
10150 rhsptr
= &args
->next
->expr
;
10152 tbp
= code
->expr1
->value
.compcall
.tbp
;
10153 gcc_assert (!tbp
->is_generic
);
10156 /* Make a temporary rhs when there is a default initializer
10157 and rhs is the same symbol as the lhs. */
10158 if ((*rhsptr
)->expr_type
== EXPR_VARIABLE
10159 && (*rhsptr
)->symtree
->n
.sym
->ts
.type
== BT_DERIVED
10160 && gfc_has_default_initializer ((*rhsptr
)->symtree
->n
.sym
->ts
.u
.derived
)
10161 && (lhs
->symtree
->n
.sym
== (*rhsptr
)->symtree
->n
.sym
))
10162 *rhsptr
= gfc_get_parentheses (*rhsptr
);
10171 && !gfc_notify_std (GFC_STD_GNU
, "BOZ literal at %L outside "
10172 "a DATA statement and outside INT/REAL/DBLE/CMPLX",
10176 /* Handle the case of a BOZ literal on the RHS. */
10177 if (rhs
->is_boz
&& lhs
->ts
.type
!= BT_INTEGER
)
10180 if (warn_surprising
)
10181 gfc_warning (OPT_Wsurprising
,
10182 "BOZ literal at %L is bitwise transferred "
10183 "non-integer symbol %qs", &code
->loc
,
10184 lhs
->symtree
->n
.sym
->name
);
10186 if (!gfc_convert_boz (rhs
, &lhs
->ts
))
10188 if ((rc
= gfc_range_check (rhs
)) != ARITH_OK
)
10190 if (rc
== ARITH_UNDERFLOW
)
10191 gfc_error ("Arithmetic underflow of bit-wise transferred BOZ at %L"
10192 ". This check can be disabled with the option "
10193 "%<-fno-range-check%>", &rhs
->where
);
10194 else if (rc
== ARITH_OVERFLOW
)
10195 gfc_error ("Arithmetic overflow of bit-wise transferred BOZ at %L"
10196 ". This check can be disabled with the option "
10197 "%<-fno-range-check%>", &rhs
->where
);
10198 else if (rc
== ARITH_NAN
)
10199 gfc_error ("Arithmetic NaN of bit-wise transferred BOZ at %L"
10200 ". This check can be disabled with the option "
10201 "%<-fno-range-check%>", &rhs
->where
);
10206 if (lhs
->ts
.type
== BT_CHARACTER
10207 && warn_character_truncation
)
10209 HOST_WIDE_INT llen
= 0, rlen
= 0;
10210 if (lhs
->ts
.u
.cl
!= NULL
10211 && lhs
->ts
.u
.cl
->length
!= NULL
10212 && lhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10213 llen
= gfc_mpz_get_hwi (lhs
->ts
.u
.cl
->length
->value
.integer
);
10215 if (rhs
->expr_type
== EXPR_CONSTANT
)
10216 rlen
= rhs
->value
.character
.length
;
10218 else if (rhs
->ts
.u
.cl
!= NULL
10219 && rhs
->ts
.u
.cl
->length
!= NULL
10220 && rhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10221 rlen
= gfc_mpz_get_hwi (rhs
->ts
.u
.cl
->length
->value
.integer
);
10223 if (rlen
&& llen
&& rlen
> llen
)
10224 gfc_warning_now (OPT_Wcharacter_truncation
,
10225 "CHARACTER expression will be truncated "
10226 "in assignment (%ld/%ld) at %L",
10227 (long) llen
, (long) rlen
, &code
->loc
);
10230 /* Ensure that a vector index expression for the lvalue is evaluated
10231 to a temporary if the lvalue symbol is referenced in it. */
10234 for (ref
= lhs
->ref
; ref
; ref
= ref
->next
)
10235 if (ref
->type
== REF_ARRAY
)
10237 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
10238 if (ref
->u
.ar
.dimen_type
[n
] == DIMEN_VECTOR
10239 && gfc_find_sym_in_expr (lhs
->symtree
->n
.sym
,
10240 ref
->u
.ar
.start
[n
]))
10242 = gfc_get_parentheses (ref
->u
.ar
.start
[n
]);
10246 if (gfc_pure (NULL
))
10248 if (lhs
->ts
.type
== BT_DERIVED
10249 && lhs
->expr_type
== EXPR_VARIABLE
10250 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10251 && rhs
->expr_type
== EXPR_VARIABLE
10252 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10253 || gfc_is_coindexed (rhs
)))
10255 /* F2008, C1283. */
10256 if (gfc_is_coindexed (rhs
))
10257 gfc_error ("Coindexed expression at %L is assigned to "
10258 "a derived type variable with a POINTER "
10259 "component in a PURE procedure",
10262 gfc_error ("The impure variable at %L is assigned to "
10263 "a derived type variable with a POINTER "
10264 "component in a PURE procedure (12.6)",
10269 /* Fortran 2008, C1283. */
10270 if (gfc_is_coindexed (lhs
))
10272 gfc_error ("Assignment to coindexed variable at %L in a PURE "
10273 "procedure", &rhs
->where
);
10278 if (gfc_implicit_pure (NULL
))
10280 if (lhs
->expr_type
== EXPR_VARIABLE
10281 && lhs
->symtree
->n
.sym
!= gfc_current_ns
->proc_name
10282 && lhs
->symtree
->n
.sym
->ns
!= gfc_current_ns
)
10283 gfc_unset_implicit_pure (NULL
);
10285 if (lhs
->ts
.type
== BT_DERIVED
10286 && lhs
->expr_type
== EXPR_VARIABLE
10287 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10288 && rhs
->expr_type
== EXPR_VARIABLE
10289 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10290 || gfc_is_coindexed (rhs
)))
10291 gfc_unset_implicit_pure (NULL
);
10293 /* Fortran 2008, C1283. */
10294 if (gfc_is_coindexed (lhs
))
10295 gfc_unset_implicit_pure (NULL
);
10298 /* F2008, 7.2.1.2. */
10299 attr
= gfc_expr_attr (lhs
);
10300 if (lhs
->ts
.type
== BT_CLASS
&& attr
.allocatable
)
10302 if (attr
.codimension
)
10304 gfc_error ("Assignment to polymorphic coarray at %L is not "
10305 "permitted", &lhs
->where
);
10308 if (!gfc_notify_std (GFC_STD_F2008
, "Assignment to an allocatable "
10309 "polymorphic variable at %L", &lhs
->where
))
10311 if (!flag_realloc_lhs
)
10313 gfc_error ("Assignment to an allocatable polymorphic variable at %L "
10314 "requires %<-frealloc-lhs%>", &lhs
->where
);
10318 else if (lhs
->ts
.type
== BT_CLASS
)
10320 gfc_error ("Nonallocatable variable must not be polymorphic in intrinsic "
10321 "assignment at %L - check that there is a matching specific "
10322 "subroutine for '=' operator", &lhs
->where
);
10326 bool lhs_coindexed
= gfc_is_coindexed (lhs
);
10328 /* F2008, Section 7.2.1.2. */
10329 if (lhs_coindexed
&& gfc_has_ultimate_allocatable (lhs
))
10331 gfc_error ("Coindexed variable must not have an allocatable ultimate "
10332 "component in assignment at %L", &lhs
->where
);
10336 /* Assign the 'data' of a class object to a derived type. */
10337 if (lhs
->ts
.type
== BT_DERIVED
10338 && rhs
->ts
.type
== BT_CLASS
10339 && rhs
->expr_type
!= EXPR_ARRAY
)
10340 gfc_add_data_component (rhs
);
10342 bool caf_convert_to_send
= flag_coarray
== GFC_FCOARRAY_LIB
10344 || (code
->expr2
->expr_type
== EXPR_FUNCTION
10345 && code
->expr2
->value
.function
.isym
10346 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
10347 && (code
->expr1
->rank
== 0 || code
->expr2
->rank
!= 0)
10348 && !gfc_expr_attr (rhs
).allocatable
10349 && !gfc_has_vector_subscript (rhs
)));
10351 gfc_check_assign (lhs
, rhs
, 1, !caf_convert_to_send
);
10353 /* Insert a GFC_ISYM_CAF_SEND intrinsic, when the LHS is a coindexed variable.
10354 Additionally, insert this code when the RHS is a CAF as we then use the
10355 GFC_ISYM_CAF_SEND intrinsic just to avoid a temporary; but do not do so if
10356 the LHS is (re)allocatable or has a vector subscript. If the LHS is a
10357 noncoindexed array and the RHS is a coindexed scalar, use the normal code
10359 if (caf_convert_to_send
)
10361 if (code
->expr2
->expr_type
== EXPR_FUNCTION
10362 && code
->expr2
->value
.function
.isym
10363 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
10364 remove_caf_get_intrinsic (code
->expr2
);
10365 code
->op
= EXEC_CALL
;
10366 gfc_get_sym_tree (GFC_PREFIX ("caf_send"), ns
, &code
->symtree
, true);
10367 code
->resolved_sym
= code
->symtree
->n
.sym
;
10368 code
->resolved_sym
->attr
.flavor
= FL_PROCEDURE
;
10369 code
->resolved_sym
->attr
.intrinsic
= 1;
10370 code
->resolved_sym
->attr
.subroutine
= 1;
10371 code
->resolved_isym
= gfc_intrinsic_subroutine_by_id (GFC_ISYM_CAF_SEND
);
10372 gfc_commit_symbol (code
->resolved_sym
);
10373 code
->ext
.actual
= gfc_get_actual_arglist ();
10374 code
->ext
.actual
->expr
= lhs
;
10375 code
->ext
.actual
->next
= gfc_get_actual_arglist ();
10376 code
->ext
.actual
->next
->expr
= rhs
;
10377 code
->expr1
= NULL
;
10378 code
->expr2
= NULL
;
10385 /* Add a component reference onto an expression. */
10388 add_comp_ref (gfc_expr
*e
, gfc_component
*c
)
10393 ref
= &((*ref
)->next
);
10394 *ref
= gfc_get_ref ();
10395 (*ref
)->type
= REF_COMPONENT
;
10396 (*ref
)->u
.c
.sym
= e
->ts
.u
.derived
;
10397 (*ref
)->u
.c
.component
= c
;
10400 /* Add a full array ref, as necessary. */
10403 gfc_add_full_array_ref (e
, c
->as
);
10404 e
->rank
= c
->as
->rank
;
10409 /* Build an assignment. Keep the argument 'op' for future use, so that
10410 pointer assignments can be made. */
10413 build_assignment (gfc_exec_op op
, gfc_expr
*expr1
, gfc_expr
*expr2
,
10414 gfc_component
*comp1
, gfc_component
*comp2
, locus loc
)
10416 gfc_code
*this_code
;
10418 this_code
= gfc_get_code (op
);
10419 this_code
->next
= NULL
;
10420 this_code
->expr1
= gfc_copy_expr (expr1
);
10421 this_code
->expr2
= gfc_copy_expr (expr2
);
10422 this_code
->loc
= loc
;
10423 if (comp1
&& comp2
)
10425 add_comp_ref (this_code
->expr1
, comp1
);
10426 add_comp_ref (this_code
->expr2
, comp2
);
10433 /* Makes a temporary variable expression based on the characteristics of
10434 a given variable expression. */
10437 get_temp_from_expr (gfc_expr
*e
, gfc_namespace
*ns
)
10439 static int serial
= 0;
10440 char name
[GFC_MAX_SYMBOL_LEN
];
10442 gfc_array_spec
*as
;
10443 gfc_array_ref
*aref
;
10446 sprintf (name
, GFC_PREFIX("DA%d"), serial
++);
10447 gfc_get_sym_tree (name
, ns
, &tmp
, false);
10448 gfc_add_type (tmp
->n
.sym
, &e
->ts
, NULL
);
10454 /* Obtain the arrayspec for the temporary. */
10455 if (e
->rank
&& e
->expr_type
!= EXPR_ARRAY
10456 && e
->expr_type
!= EXPR_FUNCTION
10457 && e
->expr_type
!= EXPR_OP
)
10459 aref
= gfc_find_array_ref (e
);
10460 if (e
->expr_type
== EXPR_VARIABLE
10461 && e
->symtree
->n
.sym
->as
== aref
->as
)
10465 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
10466 if (ref
->type
== REF_COMPONENT
10467 && ref
->u
.c
.component
->as
== aref
->as
)
10475 /* Add the attributes and the arrayspec to the temporary. */
10476 tmp
->n
.sym
->attr
= gfc_expr_attr (e
);
10477 tmp
->n
.sym
->attr
.function
= 0;
10478 tmp
->n
.sym
->attr
.result
= 0;
10479 tmp
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
10483 tmp
->n
.sym
->as
= gfc_copy_array_spec (as
);
10486 if (as
->type
== AS_DEFERRED
)
10487 tmp
->n
.sym
->attr
.allocatable
= 1;
10489 else if (e
->rank
&& (e
->expr_type
== EXPR_ARRAY
10490 || e
->expr_type
== EXPR_FUNCTION
10491 || e
->expr_type
== EXPR_OP
))
10493 tmp
->n
.sym
->as
= gfc_get_array_spec ();
10494 tmp
->n
.sym
->as
->type
= AS_DEFERRED
;
10495 tmp
->n
.sym
->as
->rank
= e
->rank
;
10496 tmp
->n
.sym
->attr
.allocatable
= 1;
10497 tmp
->n
.sym
->attr
.dimension
= 1;
10500 tmp
->n
.sym
->attr
.dimension
= 0;
10502 gfc_set_sym_referenced (tmp
->n
.sym
);
10503 gfc_commit_symbol (tmp
->n
.sym
);
10504 e
= gfc_lval_expr_from_sym (tmp
->n
.sym
);
10506 /* Should the lhs be a section, use its array ref for the
10507 temporary expression. */
10508 if (aref
&& aref
->type
!= AR_FULL
)
10510 gfc_free_ref_list (e
->ref
);
10511 e
->ref
= gfc_copy_ref (ref
);
10517 /* Add one line of code to the code chain, making sure that 'head' and
10518 'tail' are appropriately updated. */
10521 add_code_to_chain (gfc_code
**this_code
, gfc_code
**head
, gfc_code
**tail
)
10523 gcc_assert (this_code
);
10525 *head
= *tail
= *this_code
;
10527 *tail
= gfc_append_code (*tail
, *this_code
);
10532 /* Counts the potential number of part array references that would
10533 result from resolution of typebound defined assignments. */
10536 nonscalar_typebound_assign (gfc_symbol
*derived
, int depth
)
10539 int c_depth
= 0, t_depth
;
10541 for (c
= derived
->components
; c
; c
= c
->next
)
10543 if ((!gfc_bt_struct (c
->ts
.type
)
10545 || c
->attr
.allocatable
10546 || c
->attr
.proc_pointer_comp
10547 || c
->attr
.class_pointer
10548 || c
->attr
.proc_pointer
)
10549 && !c
->attr
.defined_assign_comp
)
10552 if (c
->as
&& c_depth
== 0)
10555 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
10556 t_depth
= nonscalar_typebound_assign (c
->ts
.u
.derived
,
10561 c_depth
= t_depth
> c_depth
? t_depth
: c_depth
;
10563 return depth
+ c_depth
;
10567 /* Implement 7.2.1.3 of the F08 standard:
10568 "An intrinsic assignment where the variable is of derived type is
10569 performed as if each component of the variable were assigned from the
10570 corresponding component of expr using pointer assignment (7.2.2) for
10571 each pointer component, defined assignment for each nonpointer
10572 nonallocatable component of a type that has a type-bound defined
10573 assignment consistent with the component, intrinsic assignment for
10574 each other nonpointer nonallocatable component, ..."
10576 The pointer assignments are taken care of by the intrinsic
10577 assignment of the structure itself. This function recursively adds
10578 defined assignments where required. The recursion is accomplished
10579 by calling gfc_resolve_code.
10581 When the lhs in a defined assignment has intent INOUT, we need a
10582 temporary for the lhs. In pseudo-code:
10584 ! Only call function lhs once.
10585 if (lhs is not a constant or an variable)
10588 ! Do the intrinsic assignment
10590 ! Now do the defined assignments
10591 do over components with typebound defined assignment [%cmp]
10592 #if one component's assignment procedure is INOUT
10594 #if expr2 non-variable
10600 t1%cmp {defined=} expr2%cmp
10606 expr1%cmp {defined=} expr2%cmp
10610 /* The temporary assignments have to be put on top of the additional
10611 code to avoid the result being changed by the intrinsic assignment.
10613 static int component_assignment_level
= 0;
10614 static gfc_code
*tmp_head
= NULL
, *tmp_tail
= NULL
;
10617 generate_component_assignments (gfc_code
**code
, gfc_namespace
*ns
)
10619 gfc_component
*comp1
, *comp2
;
10620 gfc_code
*this_code
= NULL
, *head
= NULL
, *tail
= NULL
;
10622 int error_count
, depth
;
10624 gfc_get_errors (NULL
, &error_count
);
10626 /* Filter out continuing processing after an error. */
10628 || (*code
)->expr1
->ts
.type
!= BT_DERIVED
10629 || (*code
)->expr2
->ts
.type
!= BT_DERIVED
)
10632 /* TODO: Handle more than one part array reference in assignments. */
10633 depth
= nonscalar_typebound_assign ((*code
)->expr1
->ts
.u
.derived
,
10634 (*code
)->expr1
->rank
? 1 : 0);
10637 gfc_warning (0, "TODO: type-bound defined assignment(s) at %L not "
10638 "done because multiple part array references would "
10639 "occur in intermediate expressions.", &(*code
)->loc
);
10643 component_assignment_level
++;
10645 /* Create a temporary so that functions get called only once. */
10646 if ((*code
)->expr2
->expr_type
!= EXPR_VARIABLE
10647 && (*code
)->expr2
->expr_type
!= EXPR_CONSTANT
)
10649 gfc_expr
*tmp_expr
;
10651 /* Assign the rhs to the temporary. */
10652 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
10653 this_code
= build_assignment (EXEC_ASSIGN
,
10654 tmp_expr
, (*code
)->expr2
,
10655 NULL
, NULL
, (*code
)->loc
);
10656 /* Add the code and substitute the rhs expression. */
10657 add_code_to_chain (&this_code
, &tmp_head
, &tmp_tail
);
10658 gfc_free_expr ((*code
)->expr2
);
10659 (*code
)->expr2
= tmp_expr
;
10662 /* Do the intrinsic assignment. This is not needed if the lhs is one
10663 of the temporaries generated here, since the intrinsic assignment
10664 to the final result already does this. */
10665 if ((*code
)->expr1
->symtree
->n
.sym
->name
[2] != '@')
10667 this_code
= build_assignment (EXEC_ASSIGN
,
10668 (*code
)->expr1
, (*code
)->expr2
,
10669 NULL
, NULL
, (*code
)->loc
);
10670 add_code_to_chain (&this_code
, &head
, &tail
);
10673 comp1
= (*code
)->expr1
->ts
.u
.derived
->components
;
10674 comp2
= (*code
)->expr2
->ts
.u
.derived
->components
;
10677 for (; comp1
; comp1
= comp1
->next
, comp2
= comp2
->next
)
10679 bool inout
= false;
10681 /* The intrinsic assignment does the right thing for pointers
10682 of all kinds and allocatable components. */
10683 if (!gfc_bt_struct (comp1
->ts
.type
)
10684 || comp1
->attr
.pointer
10685 || comp1
->attr
.allocatable
10686 || comp1
->attr
.proc_pointer_comp
10687 || comp1
->attr
.class_pointer
10688 || comp1
->attr
.proc_pointer
)
10691 /* Make an assigment for this component. */
10692 this_code
= build_assignment (EXEC_ASSIGN
,
10693 (*code
)->expr1
, (*code
)->expr2
,
10694 comp1
, comp2
, (*code
)->loc
);
10696 /* Convert the assignment if there is a defined assignment for
10697 this type. Otherwise, using the call from gfc_resolve_code,
10698 recurse into its components. */
10699 gfc_resolve_code (this_code
, ns
);
10701 if (this_code
->op
== EXEC_ASSIGN_CALL
)
10703 gfc_formal_arglist
*dummy_args
;
10705 /* Check that there is a typebound defined assignment. If not,
10706 then this must be a module defined assignment. We cannot
10707 use the defined_assign_comp attribute here because it must
10708 be this derived type that has the defined assignment and not
10710 if (!(comp1
->ts
.u
.derived
->f2k_derived
10711 && comp1
->ts
.u
.derived
->f2k_derived
10712 ->tb_op
[INTRINSIC_ASSIGN
]))
10714 gfc_free_statements (this_code
);
10719 /* If the first argument of the subroutine has intent INOUT
10720 a temporary must be generated and used instead. */
10721 rsym
= this_code
->resolved_sym
;
10722 dummy_args
= gfc_sym_get_dummy_args (rsym
);
10724 && dummy_args
->sym
->attr
.intent
== INTENT_INOUT
)
10726 gfc_code
*temp_code
;
10729 /* Build the temporary required for the assignment and put
10730 it at the head of the generated code. */
10733 t1
= get_temp_from_expr ((*code
)->expr1
, ns
);
10734 temp_code
= build_assignment (EXEC_ASSIGN
,
10735 t1
, (*code
)->expr1
,
10736 NULL
, NULL
, (*code
)->loc
);
10738 /* For allocatable LHS, check whether it is allocated. Note
10739 that allocatable components with defined assignment are
10740 not yet support. See PR 57696. */
10741 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
)
10745 gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
10746 block
= gfc_get_code (EXEC_IF
);
10747 block
->block
= gfc_get_code (EXEC_IF
);
10748 block
->block
->expr1
10749 = gfc_build_intrinsic_call (ns
,
10750 GFC_ISYM_ALLOCATED
, "allocated",
10751 (*code
)->loc
, 1, e
);
10752 block
->block
->next
= temp_code
;
10755 add_code_to_chain (&temp_code
, &tmp_head
, &tmp_tail
);
10758 /* Replace the first actual arg with the component of the
10760 gfc_free_expr (this_code
->ext
.actual
->expr
);
10761 this_code
->ext
.actual
->expr
= gfc_copy_expr (t1
);
10762 add_comp_ref (this_code
->ext
.actual
->expr
, comp1
);
10764 /* If the LHS variable is allocatable and wasn't allocated and
10765 the temporary is allocatable, pointer assign the address of
10766 the freshly allocated LHS to the temporary. */
10767 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
10768 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
10773 cond
= gfc_get_expr ();
10774 cond
->ts
.type
= BT_LOGICAL
;
10775 cond
->ts
.kind
= gfc_default_logical_kind
;
10776 cond
->expr_type
= EXPR_OP
;
10777 cond
->where
= (*code
)->loc
;
10778 cond
->value
.op
.op
= INTRINSIC_NOT
;
10779 cond
->value
.op
.op1
= gfc_build_intrinsic_call (ns
,
10780 GFC_ISYM_ALLOCATED
, "allocated",
10781 (*code
)->loc
, 1, gfc_copy_expr (t1
));
10782 block
= gfc_get_code (EXEC_IF
);
10783 block
->block
= gfc_get_code (EXEC_IF
);
10784 block
->block
->expr1
= cond
;
10785 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
10786 t1
, (*code
)->expr1
,
10787 NULL
, NULL
, (*code
)->loc
);
10788 add_code_to_chain (&block
, &head
, &tail
);
10792 else if (this_code
->op
== EXEC_ASSIGN
&& !this_code
->next
)
10794 /* Don't add intrinsic assignments since they are already
10795 effected by the intrinsic assignment of the structure. */
10796 gfc_free_statements (this_code
);
10801 add_code_to_chain (&this_code
, &head
, &tail
);
10805 /* Transfer the value to the final result. */
10806 this_code
= build_assignment (EXEC_ASSIGN
,
10807 (*code
)->expr1
, t1
,
10808 comp1
, comp2
, (*code
)->loc
);
10809 add_code_to_chain (&this_code
, &head
, &tail
);
10813 /* Put the temporary assignments at the top of the generated code. */
10814 if (tmp_head
&& component_assignment_level
== 1)
10816 gfc_append_code (tmp_head
, head
);
10818 tmp_head
= tmp_tail
= NULL
;
10821 // If we did a pointer assignment - thus, we need to ensure that the LHS is
10822 // not accidentally deallocated. Hence, nullify t1.
10823 if (t1
&& (*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
10824 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
10830 e
= gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
10831 cond
= gfc_build_intrinsic_call (ns
, GFC_ISYM_ASSOCIATED
, "associated",
10832 (*code
)->loc
, 2, gfc_copy_expr (t1
), e
);
10833 block
= gfc_get_code (EXEC_IF
);
10834 block
->block
= gfc_get_code (EXEC_IF
);
10835 block
->block
->expr1
= cond
;
10836 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
10837 t1
, gfc_get_null_expr (&(*code
)->loc
),
10838 NULL
, NULL
, (*code
)->loc
);
10839 gfc_append_code (tail
, block
);
10843 /* Now attach the remaining code chain to the input code. Step on
10844 to the end of the new code since resolution is complete. */
10845 gcc_assert ((*code
)->op
== EXEC_ASSIGN
);
10846 tail
->next
= (*code
)->next
;
10847 /* Overwrite 'code' because this would place the intrinsic assignment
10848 before the temporary for the lhs is created. */
10849 gfc_free_expr ((*code
)->expr1
);
10850 gfc_free_expr ((*code
)->expr2
);
10856 component_assignment_level
--;
10860 /* F2008: Pointer function assignments are of the form:
10861 ptr_fcn (args) = expr
10862 This function breaks these assignments into two statements:
10863 temporary_pointer => ptr_fcn(args)
10864 temporary_pointer = expr */
10867 resolve_ptr_fcn_assign (gfc_code
**code
, gfc_namespace
*ns
)
10869 gfc_expr
*tmp_ptr_expr
;
10870 gfc_code
*this_code
;
10871 gfc_component
*comp
;
10874 if ((*code
)->expr1
->expr_type
!= EXPR_FUNCTION
)
10877 /* Even if standard does not support this feature, continue to build
10878 the two statements to avoid upsetting frontend_passes.c. */
10879 gfc_notify_std (GFC_STD_F2008
, "Pointer procedure assignment at "
10880 "%L", &(*code
)->loc
);
10882 comp
= gfc_get_proc_ptr_comp ((*code
)->expr1
);
10885 s
= comp
->ts
.interface
;
10887 s
= (*code
)->expr1
->symtree
->n
.sym
;
10889 if (s
== NULL
|| !s
->result
->attr
.pointer
)
10891 gfc_error ("The function result on the lhs of the assignment at "
10892 "%L must have the pointer attribute.",
10893 &(*code
)->expr1
->where
);
10894 (*code
)->op
= EXEC_NOP
;
10898 tmp_ptr_expr
= get_temp_from_expr ((*code
)->expr2
, ns
);
10900 /* get_temp_from_expression is set up for ordinary assignments. To that
10901 end, where array bounds are not known, arrays are made allocatable.
10902 Change the temporary to a pointer here. */
10903 tmp_ptr_expr
->symtree
->n
.sym
->attr
.pointer
= 1;
10904 tmp_ptr_expr
->symtree
->n
.sym
->attr
.allocatable
= 0;
10905 tmp_ptr_expr
->where
= (*code
)->loc
;
10907 this_code
= build_assignment (EXEC_ASSIGN
,
10908 tmp_ptr_expr
, (*code
)->expr2
,
10909 NULL
, NULL
, (*code
)->loc
);
10910 this_code
->next
= (*code
)->next
;
10911 (*code
)->next
= this_code
;
10912 (*code
)->op
= EXEC_POINTER_ASSIGN
;
10913 (*code
)->expr2
= (*code
)->expr1
;
10914 (*code
)->expr1
= tmp_ptr_expr
;
10920 /* Deferred character length assignments from an operator expression
10921 require a temporary because the character length of the lhs can
10922 change in the course of the assignment. */
10925 deferred_op_assign (gfc_code
**code
, gfc_namespace
*ns
)
10927 gfc_expr
*tmp_expr
;
10928 gfc_code
*this_code
;
10930 if (!((*code
)->expr1
->ts
.type
== BT_CHARACTER
10931 && (*code
)->expr1
->ts
.deferred
&& (*code
)->expr1
->rank
10932 && (*code
)->expr2
->expr_type
== EXPR_OP
))
10935 if (!gfc_check_dependency ((*code
)->expr1
, (*code
)->expr2
, 1))
10938 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
10939 tmp_expr
->where
= (*code
)->loc
;
10941 /* A new charlen is required to ensure that the variable string
10942 length is different to that of the original lhs. */
10943 tmp_expr
->ts
.u
.cl
= gfc_get_charlen();
10944 tmp_expr
->symtree
->n
.sym
->ts
.u
.cl
= tmp_expr
->ts
.u
.cl
;
10945 tmp_expr
->ts
.u
.cl
->next
= (*code
)->expr2
->ts
.u
.cl
->next
;
10946 (*code
)->expr2
->ts
.u
.cl
->next
= tmp_expr
->ts
.u
.cl
;
10948 tmp_expr
->symtree
->n
.sym
->ts
.deferred
= 1;
10950 this_code
= build_assignment (EXEC_ASSIGN
,
10952 gfc_copy_expr (tmp_expr
),
10953 NULL
, NULL
, (*code
)->loc
);
10955 (*code
)->expr1
= tmp_expr
;
10957 this_code
->next
= (*code
)->next
;
10958 (*code
)->next
= this_code
;
10964 /* Given a block of code, recursively resolve everything pointed to by this
10968 gfc_resolve_code (gfc_code
*code
, gfc_namespace
*ns
)
10970 int omp_workshare_save
;
10971 int forall_save
, do_concurrent_save
;
10975 frame
.prev
= cs_base
;
10979 find_reachable_labels (code
);
10981 for (; code
; code
= code
->next
)
10983 frame
.current
= code
;
10984 forall_save
= forall_flag
;
10985 do_concurrent_save
= gfc_do_concurrent_flag
;
10987 if (code
->op
== EXEC_FORALL
)
10990 gfc_resolve_forall (code
, ns
, forall_save
);
10993 else if (code
->block
)
10995 omp_workshare_save
= -1;
10998 case EXEC_OACC_PARALLEL_LOOP
:
10999 case EXEC_OACC_PARALLEL
:
11000 case EXEC_OACC_KERNELS_LOOP
:
11001 case EXEC_OACC_KERNELS
:
11002 case EXEC_OACC_DATA
:
11003 case EXEC_OACC_HOST_DATA
:
11004 case EXEC_OACC_LOOP
:
11005 gfc_resolve_oacc_blocks (code
, ns
);
11007 case EXEC_OMP_PARALLEL_WORKSHARE
:
11008 omp_workshare_save
= omp_workshare_flag
;
11009 omp_workshare_flag
= 1;
11010 gfc_resolve_omp_parallel_blocks (code
, ns
);
11012 case EXEC_OMP_PARALLEL
:
11013 case EXEC_OMP_PARALLEL_DO
:
11014 case EXEC_OMP_PARALLEL_DO_SIMD
:
11015 case EXEC_OMP_PARALLEL_SECTIONS
:
11016 case EXEC_OMP_TARGET_PARALLEL
:
11017 case EXEC_OMP_TARGET_PARALLEL_DO
:
11018 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11019 case EXEC_OMP_TARGET_TEAMS
:
11020 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11021 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11022 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11023 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11024 case EXEC_OMP_TASK
:
11025 case EXEC_OMP_TASKLOOP
:
11026 case EXEC_OMP_TASKLOOP_SIMD
:
11027 case EXEC_OMP_TEAMS
:
11028 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11029 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11030 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11031 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11032 omp_workshare_save
= omp_workshare_flag
;
11033 omp_workshare_flag
= 0;
11034 gfc_resolve_omp_parallel_blocks (code
, ns
);
11036 case EXEC_OMP_DISTRIBUTE
:
11037 case EXEC_OMP_DISTRIBUTE_SIMD
:
11039 case EXEC_OMP_DO_SIMD
:
11040 case EXEC_OMP_SIMD
:
11041 case EXEC_OMP_TARGET_SIMD
:
11042 gfc_resolve_omp_do_blocks (code
, ns
);
11044 case EXEC_SELECT_TYPE
:
11045 /* Blocks are handled in resolve_select_type because we have
11046 to transform the SELECT TYPE into ASSOCIATE first. */
11048 case EXEC_DO_CONCURRENT
:
11049 gfc_do_concurrent_flag
= 1;
11050 gfc_resolve_blocks (code
->block
, ns
);
11051 gfc_do_concurrent_flag
= 2;
11053 case EXEC_OMP_WORKSHARE
:
11054 omp_workshare_save
= omp_workshare_flag
;
11055 omp_workshare_flag
= 1;
11058 gfc_resolve_blocks (code
->block
, ns
);
11062 if (omp_workshare_save
!= -1)
11063 omp_workshare_flag
= omp_workshare_save
;
11067 if (code
->op
!= EXEC_COMPCALL
&& code
->op
!= EXEC_CALL_PPC
)
11068 t
= gfc_resolve_expr (code
->expr1
);
11069 forall_flag
= forall_save
;
11070 gfc_do_concurrent_flag
= do_concurrent_save
;
11072 if (!gfc_resolve_expr (code
->expr2
))
11075 if (code
->op
== EXEC_ALLOCATE
11076 && !gfc_resolve_expr (code
->expr3
))
11082 case EXEC_END_BLOCK
:
11083 case EXEC_END_NESTED_BLOCK
:
11087 case EXEC_ERROR_STOP
:
11089 case EXEC_CONTINUE
:
11091 case EXEC_ASSIGN_CALL
:
11094 case EXEC_CRITICAL
:
11095 resolve_critical (code
);
11098 case EXEC_SYNC_ALL
:
11099 case EXEC_SYNC_IMAGES
:
11100 case EXEC_SYNC_MEMORY
:
11101 resolve_sync (code
);
11106 case EXEC_EVENT_POST
:
11107 case EXEC_EVENT_WAIT
:
11108 resolve_lock_unlock_event (code
);
11111 case EXEC_FAIL_IMAGE
:
11112 case EXEC_FORM_TEAM
:
11113 case EXEC_CHANGE_TEAM
:
11114 case EXEC_END_TEAM
:
11115 case EXEC_SYNC_TEAM
:
11119 /* Keep track of which entry we are up to. */
11120 current_entry_id
= code
->ext
.entry
->id
;
11124 resolve_where (code
, NULL
);
11128 if (code
->expr1
!= NULL
)
11130 if (code
->expr1
->ts
.type
!= BT_INTEGER
)
11131 gfc_error ("ASSIGNED GOTO statement at %L requires an "
11132 "INTEGER variable", &code
->expr1
->where
);
11133 else if (code
->expr1
->symtree
->n
.sym
->attr
.assign
!= 1)
11134 gfc_error ("Variable %qs has not been assigned a target "
11135 "label at %L", code
->expr1
->symtree
->n
.sym
->name
,
11136 &code
->expr1
->where
);
11139 resolve_branch (code
->label1
, code
);
11143 if (code
->expr1
!= NULL
11144 && (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
))
11145 gfc_error ("Alternate RETURN statement at %L requires a SCALAR-"
11146 "INTEGER return specifier", &code
->expr1
->where
);
11149 case EXEC_INIT_ASSIGN
:
11150 case EXEC_END_PROCEDURE
:
11157 /* Remove a GFC_ISYM_CAF_GET inserted for a coindexed variable on
11159 if (code
->expr1
->expr_type
== EXPR_FUNCTION
11160 && code
->expr1
->value
.function
.isym
11161 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
11162 remove_caf_get_intrinsic (code
->expr1
);
11164 /* If this is a pointer function in an lvalue variable context,
11165 the new code will have to be resolved afresh. This is also the
11166 case with an error, where the code is transformed into NOP to
11167 prevent ICEs downstream. */
11168 if (resolve_ptr_fcn_assign (&code
, ns
)
11169 || code
->op
== EXEC_NOP
)
11172 if (!gfc_check_vardef_context (code
->expr1
, false, false, false,
11176 if (resolve_ordinary_assign (code
, ns
))
11178 if (code
->op
== EXEC_COMPCALL
)
11184 /* Check for dependencies in deferred character length array
11185 assignments and generate a temporary, if necessary. */
11186 if (code
->op
== EXEC_ASSIGN
&& deferred_op_assign (&code
, ns
))
11189 /* F03 7.4.1.3 for non-allocatable, non-pointer components. */
11190 if (code
->op
!= EXEC_CALL
&& code
->expr1
->ts
.type
== BT_DERIVED
11191 && code
->expr1
->ts
.u
.derived
11192 && code
->expr1
->ts
.u
.derived
->attr
.defined_assign_comp
)
11193 generate_component_assignments (&code
, ns
);
11197 case EXEC_LABEL_ASSIGN
:
11198 if (code
->label1
->defined
== ST_LABEL_UNKNOWN
)
11199 gfc_error ("Label %d referenced at %L is never defined",
11200 code
->label1
->value
, &code
->label1
->where
);
11202 && (code
->expr1
->expr_type
!= EXPR_VARIABLE
11203 || code
->expr1
->symtree
->n
.sym
->ts
.type
!= BT_INTEGER
11204 || code
->expr1
->symtree
->n
.sym
->ts
.kind
11205 != gfc_default_integer_kind
11206 || code
->expr1
->symtree
->n
.sym
->as
!= NULL
))
11207 gfc_error ("ASSIGN statement at %L requires a scalar "
11208 "default INTEGER variable", &code
->expr1
->where
);
11211 case EXEC_POINTER_ASSIGN
:
11218 /* This is both a variable definition and pointer assignment
11219 context, so check both of them. For rank remapping, a final
11220 array ref may be present on the LHS and fool gfc_expr_attr
11221 used in gfc_check_vardef_context. Remove it. */
11222 e
= remove_last_array_ref (code
->expr1
);
11223 t
= gfc_check_vardef_context (e
, true, false, false,
11224 _("pointer assignment"));
11226 t
= gfc_check_vardef_context (e
, false, false, false,
11227 _("pointer assignment"));
11232 gfc_check_pointer_assign (code
->expr1
, code
->expr2
);
11234 /* Assigning a class object always is a regular assign. */
11235 if (code
->expr2
->ts
.type
== BT_CLASS
11236 && code
->expr1
->ts
.type
== BT_CLASS
11237 && !CLASS_DATA (code
->expr2
)->attr
.dimension
11238 && !(gfc_expr_attr (code
->expr1
).proc_pointer
11239 && code
->expr2
->expr_type
== EXPR_VARIABLE
11240 && code
->expr2
->symtree
->n
.sym
->attr
.flavor
11242 code
->op
= EXEC_ASSIGN
;
11246 case EXEC_ARITHMETIC_IF
:
11248 gfc_expr
*e
= code
->expr1
;
11250 gfc_resolve_expr (e
);
11251 if (e
->expr_type
== EXPR_NULL
)
11252 gfc_error ("Invalid NULL at %L", &e
->where
);
11254 if (t
&& (e
->rank
> 0
11255 || !(e
->ts
.type
== BT_REAL
|| e
->ts
.type
== BT_INTEGER
)))
11256 gfc_error ("Arithmetic IF statement at %L requires a scalar "
11257 "REAL or INTEGER expression", &e
->where
);
11259 resolve_branch (code
->label1
, code
);
11260 resolve_branch (code
->label2
, code
);
11261 resolve_branch (code
->label3
, code
);
11266 if (t
&& code
->expr1
!= NULL
11267 && (code
->expr1
->ts
.type
!= BT_LOGICAL
11268 || code
->expr1
->rank
!= 0))
11269 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
11270 &code
->expr1
->where
);
11275 resolve_call (code
);
11278 case EXEC_COMPCALL
:
11280 resolve_typebound_subroutine (code
);
11283 case EXEC_CALL_PPC
:
11284 resolve_ppc_call (code
);
11288 /* Select is complicated. Also, a SELECT construct could be
11289 a transformed computed GOTO. */
11290 resolve_select (code
, false);
11293 case EXEC_SELECT_TYPE
:
11294 resolve_select_type (code
, ns
);
11298 resolve_block_construct (code
);
11302 if (code
->ext
.iterator
!= NULL
)
11304 gfc_iterator
*iter
= code
->ext
.iterator
;
11305 if (gfc_resolve_iterator (iter
, true, false))
11306 gfc_resolve_do_iterator (code
, iter
->var
->symtree
->n
.sym
,
11311 case EXEC_DO_WHILE
:
11312 if (code
->expr1
== NULL
)
11313 gfc_internal_error ("gfc_resolve_code(): No expression on "
11316 && (code
->expr1
->rank
!= 0
11317 || code
->expr1
->ts
.type
!= BT_LOGICAL
))
11318 gfc_error ("Exit condition of DO WHILE loop at %L must be "
11319 "a scalar LOGICAL expression", &code
->expr1
->where
);
11322 case EXEC_ALLOCATE
:
11324 resolve_allocate_deallocate (code
, "ALLOCATE");
11328 case EXEC_DEALLOCATE
:
11330 resolve_allocate_deallocate (code
, "DEALLOCATE");
11335 if (!gfc_resolve_open (code
->ext
.open
))
11338 resolve_branch (code
->ext
.open
->err
, code
);
11342 if (!gfc_resolve_close (code
->ext
.close
))
11345 resolve_branch (code
->ext
.close
->err
, code
);
11348 case EXEC_BACKSPACE
:
11352 if (!gfc_resolve_filepos (code
->ext
.filepos
))
11355 resolve_branch (code
->ext
.filepos
->err
, code
);
11359 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11362 resolve_branch (code
->ext
.inquire
->err
, code
);
11365 case EXEC_IOLENGTH
:
11366 gcc_assert (code
->ext
.inquire
!= NULL
);
11367 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11370 resolve_branch (code
->ext
.inquire
->err
, code
);
11374 if (!gfc_resolve_wait (code
->ext
.wait
))
11377 resolve_branch (code
->ext
.wait
->err
, code
);
11378 resolve_branch (code
->ext
.wait
->end
, code
);
11379 resolve_branch (code
->ext
.wait
->eor
, code
);
11384 if (!gfc_resolve_dt (code
->ext
.dt
, &code
->loc
))
11387 resolve_branch (code
->ext
.dt
->err
, code
);
11388 resolve_branch (code
->ext
.dt
->end
, code
);
11389 resolve_branch (code
->ext
.dt
->eor
, code
);
11392 case EXEC_TRANSFER
:
11393 resolve_transfer (code
);
11396 case EXEC_DO_CONCURRENT
:
11398 resolve_forall_iterators (code
->ext
.forall_iterator
);
11400 if (code
->expr1
!= NULL
11401 && (code
->expr1
->ts
.type
!= BT_LOGICAL
|| code
->expr1
->rank
))
11402 gfc_error ("FORALL mask clause at %L requires a scalar LOGICAL "
11403 "expression", &code
->expr1
->where
);
11406 case EXEC_OACC_PARALLEL_LOOP
:
11407 case EXEC_OACC_PARALLEL
:
11408 case EXEC_OACC_KERNELS_LOOP
:
11409 case EXEC_OACC_KERNELS
:
11410 case EXEC_OACC_DATA
:
11411 case EXEC_OACC_HOST_DATA
:
11412 case EXEC_OACC_LOOP
:
11413 case EXEC_OACC_UPDATE
:
11414 case EXEC_OACC_WAIT
:
11415 case EXEC_OACC_CACHE
:
11416 case EXEC_OACC_ENTER_DATA
:
11417 case EXEC_OACC_EXIT_DATA
:
11418 case EXEC_OACC_ATOMIC
:
11419 case EXEC_OACC_DECLARE
:
11420 gfc_resolve_oacc_directive (code
, ns
);
11423 case EXEC_OMP_ATOMIC
:
11424 case EXEC_OMP_BARRIER
:
11425 case EXEC_OMP_CANCEL
:
11426 case EXEC_OMP_CANCELLATION_POINT
:
11427 case EXEC_OMP_CRITICAL
:
11428 case EXEC_OMP_FLUSH
:
11429 case EXEC_OMP_DISTRIBUTE
:
11430 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
11431 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
11432 case EXEC_OMP_DISTRIBUTE_SIMD
:
11434 case EXEC_OMP_DO_SIMD
:
11435 case EXEC_OMP_MASTER
:
11436 case EXEC_OMP_ORDERED
:
11437 case EXEC_OMP_SECTIONS
:
11438 case EXEC_OMP_SIMD
:
11439 case EXEC_OMP_SINGLE
:
11440 case EXEC_OMP_TARGET
:
11441 case EXEC_OMP_TARGET_DATA
:
11442 case EXEC_OMP_TARGET_ENTER_DATA
:
11443 case EXEC_OMP_TARGET_EXIT_DATA
:
11444 case EXEC_OMP_TARGET_PARALLEL
:
11445 case EXEC_OMP_TARGET_PARALLEL_DO
:
11446 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11447 case EXEC_OMP_TARGET_SIMD
:
11448 case EXEC_OMP_TARGET_TEAMS
:
11449 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11450 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11451 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11452 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11453 case EXEC_OMP_TARGET_UPDATE
:
11454 case EXEC_OMP_TASK
:
11455 case EXEC_OMP_TASKGROUP
:
11456 case EXEC_OMP_TASKLOOP
:
11457 case EXEC_OMP_TASKLOOP_SIMD
:
11458 case EXEC_OMP_TASKWAIT
:
11459 case EXEC_OMP_TASKYIELD
:
11460 case EXEC_OMP_TEAMS
:
11461 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11462 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11463 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11464 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11465 case EXEC_OMP_WORKSHARE
:
11466 gfc_resolve_omp_directive (code
, ns
);
11469 case EXEC_OMP_PARALLEL
:
11470 case EXEC_OMP_PARALLEL_DO
:
11471 case EXEC_OMP_PARALLEL_DO_SIMD
:
11472 case EXEC_OMP_PARALLEL_SECTIONS
:
11473 case EXEC_OMP_PARALLEL_WORKSHARE
:
11474 omp_workshare_save
= omp_workshare_flag
;
11475 omp_workshare_flag
= 0;
11476 gfc_resolve_omp_directive (code
, ns
);
11477 omp_workshare_flag
= omp_workshare_save
;
11481 gfc_internal_error ("gfc_resolve_code(): Bad statement code");
11485 cs_base
= frame
.prev
;
11489 /* Resolve initial values and make sure they are compatible with
11493 resolve_values (gfc_symbol
*sym
)
11497 if (sym
->value
== NULL
)
11500 if (sym
->value
->expr_type
== EXPR_STRUCTURE
)
11501 t
= resolve_structure_cons (sym
->value
, 1);
11503 t
= gfc_resolve_expr (sym
->value
);
11508 gfc_check_assign_symbol (sym
, NULL
, sym
->value
);
11512 /* Verify any BIND(C) derived types in the namespace so we can report errors
11513 for them once, rather than for each variable declared of that type. */
11516 resolve_bind_c_derived_types (gfc_symbol
*derived_sym
)
11518 if (derived_sym
!= NULL
&& derived_sym
->attr
.flavor
== FL_DERIVED
11519 && derived_sym
->attr
.is_bind_c
== 1)
11520 verify_bind_c_derived_type (derived_sym
);
11526 /* Check the interfaces of DTIO procedures associated with derived
11527 type 'sym'. These procedures can either have typebound bindings or
11528 can appear in DTIO generic interfaces. */
11531 gfc_verify_DTIO_procedures (gfc_symbol
*sym
)
11533 if (!sym
|| sym
->attr
.flavor
!= FL_DERIVED
)
11536 gfc_check_dtio_interfaces (sym
);
11541 /* Verify that any binding labels used in a given namespace do not collide
11542 with the names or binding labels of any global symbols. Multiple INTERFACE
11543 for the same procedure are permitted. */
11546 gfc_verify_binding_labels (gfc_symbol
*sym
)
11549 const char *module
;
11551 if (!sym
|| !sym
->attr
.is_bind_c
|| sym
->attr
.is_iso_c
11552 || sym
->attr
.flavor
== FL_DERIVED
|| !sym
->binding_label
)
11555 gsym
= gfc_find_case_gsymbol (gfc_gsym_root
, sym
->binding_label
);
11558 module
= sym
->module
;
11559 else if (sym
->ns
&& sym
->ns
->proc_name
11560 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
11561 module
= sym
->ns
->proc_name
->name
;
11562 else if (sym
->ns
&& sym
->ns
->parent
11563 && sym
->ns
&& sym
->ns
->parent
->proc_name
11564 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
11565 module
= sym
->ns
->parent
->proc_name
->name
;
11571 && (gsym
->type
== GSYM_FUNCTION
|| gsym
->type
== GSYM_SUBROUTINE
)))
11574 gsym
= gfc_get_gsymbol (sym
->binding_label
);
11575 gsym
->where
= sym
->declared_at
;
11576 gsym
->sym_name
= sym
->name
;
11577 gsym
->binding_label
= sym
->binding_label
;
11578 gsym
->ns
= sym
->ns
;
11579 gsym
->mod_name
= module
;
11580 if (sym
->attr
.function
)
11581 gsym
->type
= GSYM_FUNCTION
;
11582 else if (sym
->attr
.subroutine
)
11583 gsym
->type
= GSYM_SUBROUTINE
;
11584 /* Mark as variable/procedure as defined, unless its an INTERFACE. */
11585 gsym
->defined
= sym
->attr
.if_source
!= IFSRC_IFBODY
;
11589 if (sym
->attr
.flavor
== FL_VARIABLE
&& gsym
->type
!= GSYM_UNKNOWN
)
11591 gfc_error ("Variable %qs with binding label %qs at %L uses the same global "
11592 "identifier as entity at %L", sym
->name
,
11593 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11594 /* Clear the binding label to prevent checking multiple times. */
11595 sym
->binding_label
= NULL
;
11598 else if (sym
->attr
.flavor
== FL_VARIABLE
&& module
11599 && (strcmp (module
, gsym
->mod_name
) != 0
11600 || strcmp (sym
->name
, gsym
->sym_name
) != 0))
11602 /* This can only happen if the variable is defined in a module - if it
11603 isn't the same module, reject it. */
11604 gfc_error ("Variable %qs from module %qs with binding label %qs at %L "
11605 "uses the same global identifier as entity at %L from module %qs",
11606 sym
->name
, module
, sym
->binding_label
,
11607 &sym
->declared_at
, &gsym
->where
, gsym
->mod_name
);
11608 sym
->binding_label
= NULL
;
11610 else if ((sym
->attr
.function
|| sym
->attr
.subroutine
)
11611 && ((gsym
->type
!= GSYM_SUBROUTINE
&& gsym
->type
!= GSYM_FUNCTION
)
11612 || (gsym
->defined
&& sym
->attr
.if_source
!= IFSRC_IFBODY
))
11613 && sym
!= gsym
->ns
->proc_name
11614 && (module
!= gsym
->mod_name
11615 || strcmp (gsym
->sym_name
, sym
->name
) != 0
11616 || (module
&& strcmp (module
, gsym
->mod_name
) != 0)))
11618 /* Print an error if the procedure is defined multiple times; we have to
11619 exclude references to the same procedure via module association or
11620 multiple checks for the same procedure. */
11621 gfc_error ("Procedure %qs with binding label %qs at %L uses the same "
11622 "global identifier as entity at %L", sym
->name
,
11623 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11624 sym
->binding_label
= NULL
;
11629 /* Resolve an index expression. */
11632 resolve_index_expr (gfc_expr
*e
)
11634 if (!gfc_resolve_expr (e
))
11637 if (!gfc_simplify_expr (e
, 0))
11640 if (!gfc_specification_expr (e
))
11647 /* Resolve a charlen structure. */
11650 resolve_charlen (gfc_charlen
*cl
)
11653 bool saved_specification_expr
;
11659 saved_specification_expr
= specification_expr
;
11660 specification_expr
= true;
11662 if (cl
->length_from_typespec
)
11664 if (!gfc_resolve_expr (cl
->length
))
11666 specification_expr
= saved_specification_expr
;
11670 if (!gfc_simplify_expr (cl
->length
, 0))
11672 specification_expr
= saved_specification_expr
;
11676 /* cl->length has been resolved. It should have an integer type. */
11677 if (cl
->length
->ts
.type
!= BT_INTEGER
)
11679 gfc_error ("Scalar INTEGER expression expected at %L",
11680 &cl
->length
->where
);
11686 if (!resolve_index_expr (cl
->length
))
11688 specification_expr
= saved_specification_expr
;
11693 /* F2008, 4.4.3.2: If the character length parameter value evaluates to
11694 a negative value, the length of character entities declared is zero. */
11695 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11696 && mpz_sgn (cl
->length
->value
.integer
) < 0)
11697 gfc_replace_expr (cl
->length
,
11698 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 0));
11700 /* Check that the character length is not too large. */
11701 k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
11702 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11703 && cl
->length
->ts
.type
== BT_INTEGER
11704 && mpz_cmp (cl
->length
->value
.integer
, gfc_integer_kinds
[k
].huge
) > 0)
11706 gfc_error ("String length at %L is too large", &cl
->length
->where
);
11707 specification_expr
= saved_specification_expr
;
11711 specification_expr
= saved_specification_expr
;
11716 /* Test for non-constant shape arrays. */
11719 is_non_constant_shape_array (gfc_symbol
*sym
)
11725 not_constant
= false;
11726 if (sym
->as
!= NULL
)
11728 /* Unfortunately, !gfc_is_compile_time_shape hits a legal case that
11729 has not been simplified; parameter array references. Do the
11730 simplification now. */
11731 for (i
= 0; i
< sym
->as
->rank
+ sym
->as
->corank
; i
++)
11733 e
= sym
->as
->lower
[i
];
11734 if (e
&& (!resolve_index_expr(e
)
11735 || !gfc_is_constant_expr (e
)))
11736 not_constant
= true;
11737 e
= sym
->as
->upper
[i
];
11738 if (e
&& (!resolve_index_expr(e
)
11739 || !gfc_is_constant_expr (e
)))
11740 not_constant
= true;
11743 return not_constant
;
11746 /* Given a symbol and an initialization expression, add code to initialize
11747 the symbol to the function entry. */
11749 build_init_assign (gfc_symbol
*sym
, gfc_expr
*init
)
11753 gfc_namespace
*ns
= sym
->ns
;
11755 /* Search for the function namespace if this is a contained
11756 function without an explicit result. */
11757 if (sym
->attr
.function
&& sym
== sym
->result
11758 && sym
->name
!= sym
->ns
->proc_name
->name
)
11760 ns
= ns
->contained
;
11761 for (;ns
; ns
= ns
->sibling
)
11762 if (strcmp (ns
->proc_name
->name
, sym
->name
) == 0)
11768 gfc_free_expr (init
);
11772 /* Build an l-value expression for the result. */
11773 lval
= gfc_lval_expr_from_sym (sym
);
11775 /* Add the code at scope entry. */
11776 init_st
= gfc_get_code (EXEC_INIT_ASSIGN
);
11777 init_st
->next
= ns
->code
;
11778 ns
->code
= init_st
;
11780 /* Assign the default initializer to the l-value. */
11781 init_st
->loc
= sym
->declared_at
;
11782 init_st
->expr1
= lval
;
11783 init_st
->expr2
= init
;
11787 /* Whether or not we can generate a default initializer for a symbol. */
11790 can_generate_init (gfc_symbol
*sym
)
11792 symbol_attribute
*a
;
11797 /* These symbols should never have a default initialization. */
11802 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
11803 && (CLASS_DATA (sym
)->attr
.class_pointer
11804 || CLASS_DATA (sym
)->attr
.proc_pointer
))
11805 || a
->in_equivalence
11812 || (!a
->referenced
&& !a
->result
)
11813 || (a
->dummy
&& a
->intent
!= INTENT_OUT
)
11814 || (a
->function
&& sym
!= sym
->result
)
11819 /* Assign the default initializer to a derived type variable or result. */
11822 apply_default_init (gfc_symbol
*sym
)
11824 gfc_expr
*init
= NULL
;
11826 if (sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
11829 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
)
11830 init
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
11832 if (init
== NULL
&& sym
->ts
.type
!= BT_CLASS
)
11835 build_init_assign (sym
, init
);
11836 sym
->attr
.referenced
= 1;
11840 /* Build an initializer for a local. Returns null if the symbol should not have
11841 a default initialization. */
11844 build_default_init_expr (gfc_symbol
*sym
)
11846 /* These symbols should never have a default initialization. */
11847 if (sym
->attr
.allocatable
11848 || sym
->attr
.external
11850 || sym
->attr
.pointer
11851 || sym
->attr
.in_equivalence
11852 || sym
->attr
.in_common
11855 || sym
->attr
.cray_pointee
11856 || sym
->attr
.cray_pointer
11860 /* Get the appropriate init expression. */
11861 return gfc_build_default_init_expr (&sym
->ts
, &sym
->declared_at
);
11864 /* Add an initialization expression to a local variable. */
11866 apply_default_init_local (gfc_symbol
*sym
)
11868 gfc_expr
*init
= NULL
;
11870 /* The symbol should be a variable or a function return value. */
11871 if ((sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
11872 || (sym
->attr
.function
&& sym
->result
!= sym
))
11875 /* Try to build the initializer expression. If we can't initialize
11876 this symbol, then init will be NULL. */
11877 init
= build_default_init_expr (sym
);
11881 /* For saved variables, we don't want to add an initializer at function
11882 entry, so we just add a static initializer. Note that automatic variables
11883 are stack allocated even with -fno-automatic; we have also to exclude
11884 result variable, which are also nonstatic. */
11885 if (!sym
->attr
.automatic
11886 && (sym
->attr
.save
|| sym
->ns
->save_all
11887 || (flag_max_stack_var_size
== 0 && !sym
->attr
.result
11888 && (sym
->ns
->proc_name
&& !sym
->ns
->proc_name
->attr
.recursive
)
11889 && (!sym
->attr
.dimension
|| !is_non_constant_shape_array (sym
)))))
11891 /* Don't clobber an existing initializer! */
11892 gcc_assert (sym
->value
== NULL
);
11897 build_init_assign (sym
, init
);
11901 /* Resolution of common features of flavors variable and procedure. */
11904 resolve_fl_var_and_proc (gfc_symbol
*sym
, int mp_flag
)
11906 gfc_array_spec
*as
;
11908 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
11909 as
= CLASS_DATA (sym
)->as
;
11913 /* Constraints on deferred shape variable. */
11914 if (as
== NULL
|| as
->type
!= AS_DEFERRED
)
11916 bool pointer
, allocatable
, dimension
;
11918 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
11920 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
11921 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
11922 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
11926 pointer
= sym
->attr
.pointer
&& !sym
->attr
.select_type_temporary
;
11927 allocatable
= sym
->attr
.allocatable
;
11928 dimension
= sym
->attr
.dimension
;
11933 if (dimension
&& as
->type
!= AS_ASSUMED_RANK
)
11935 gfc_error ("Allocatable array %qs at %L must have a deferred "
11936 "shape or assumed rank", sym
->name
, &sym
->declared_at
);
11939 else if (!gfc_notify_std (GFC_STD_F2003
, "Scalar object "
11940 "%qs at %L may not be ALLOCATABLE",
11941 sym
->name
, &sym
->declared_at
))
11945 if (pointer
&& dimension
&& as
->type
!= AS_ASSUMED_RANK
)
11947 gfc_error ("Array pointer %qs at %L must have a deferred shape or "
11948 "assumed rank", sym
->name
, &sym
->declared_at
);
11954 if (!mp_flag
&& !sym
->attr
.allocatable
&& !sym
->attr
.pointer
11955 && sym
->ts
.type
!= BT_CLASS
&& !sym
->assoc
)
11957 gfc_error ("Array %qs at %L cannot have a deferred shape",
11958 sym
->name
, &sym
->declared_at
);
11963 /* Constraints on polymorphic variables. */
11964 if (sym
->ts
.type
== BT_CLASS
&& !(sym
->result
&& sym
->result
!= sym
))
11967 if (sym
->attr
.class_ok
11968 && !sym
->attr
.select_type_temporary
11969 && !UNLIMITED_POLY (sym
)
11970 && !gfc_type_is_extensible (CLASS_DATA (sym
)->ts
.u
.derived
))
11972 gfc_error ("Type %qs of CLASS variable %qs at %L is not extensible",
11973 CLASS_DATA (sym
)->ts
.u
.derived
->name
, sym
->name
,
11974 &sym
->declared_at
);
11979 /* Assume that use associated symbols were checked in the module ns.
11980 Class-variables that are associate-names are also something special
11981 and excepted from the test. */
11982 if (!sym
->attr
.class_ok
&& !sym
->attr
.use_assoc
&& !sym
->assoc
)
11984 gfc_error ("CLASS variable %qs at %L must be dummy, allocatable "
11985 "or pointer", sym
->name
, &sym
->declared_at
);
11994 /* Additional checks for symbols with flavor variable and derived
11995 type. To be called from resolve_fl_variable. */
11998 resolve_fl_variable_derived (gfc_symbol
*sym
, int no_init_flag
)
12000 gcc_assert (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
);
12002 /* Check to see if a derived type is blocked from being host
12003 associated by the presence of another class I symbol in the same
12004 namespace. 14.6.1.3 of the standard and the discussion on
12005 comp.lang.fortran. */
12006 if (sym
->ns
!= sym
->ts
.u
.derived
->ns
12007 && sym
->ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
12010 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 0, &s
);
12011 if (s
&& s
->attr
.generic
)
12012 s
= gfc_find_dt_in_generic (s
);
12013 if (s
&& !gfc_fl_struct (s
->attr
.flavor
))
12015 gfc_error ("The type %qs cannot be host associated at %L "
12016 "because it is blocked by an incompatible object "
12017 "of the same name declared at %L",
12018 sym
->ts
.u
.derived
->name
, &sym
->declared_at
,
12024 /* 4th constraint in section 11.3: "If an object of a type for which
12025 component-initialization is specified (R429) appears in the
12026 specification-part of a module and does not have the ALLOCATABLE
12027 or POINTER attribute, the object shall have the SAVE attribute."
12029 The check for initializers is performed with
12030 gfc_has_default_initializer because gfc_default_initializer generates
12031 a hidden default for allocatable components. */
12032 if (!(sym
->value
|| no_init_flag
) && sym
->ns
->proc_name
12033 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12034 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
) && !sym
->attr
.save
12035 && !sym
->attr
.pointer
&& !sym
->attr
.allocatable
12036 && gfc_has_default_initializer (sym
->ts
.u
.derived
)
12037 && !gfc_notify_std (GFC_STD_F2008
, "Implied SAVE for module variable "
12038 "%qs at %L, needed due to the default "
12039 "initialization", sym
->name
, &sym
->declared_at
))
12042 /* Assign default initializer. */
12043 if (!(sym
->value
|| sym
->attr
.pointer
|| sym
->attr
.allocatable
)
12044 && (!no_init_flag
|| sym
->attr
.intent
== INTENT_OUT
))
12045 sym
->value
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12051 /* F2008, C402 (R401): A colon shall not be used as a type-param-value
12052 except in the declaration of an entity or component that has the POINTER
12053 or ALLOCATABLE attribute. */
12056 deferred_requirements (gfc_symbol
*sym
)
12058 if (sym
->ts
.deferred
12059 && !(sym
->attr
.pointer
12060 || sym
->attr
.allocatable
12061 || sym
->attr
.associate_var
12062 || sym
->attr
.omp_udr_artificial_var
))
12064 gfc_error ("Entity %qs at %L has a deferred type parameter and "
12065 "requires either the POINTER or ALLOCATABLE attribute",
12066 sym
->name
, &sym
->declared_at
);
12073 /* Resolve symbols with flavor variable. */
12076 resolve_fl_variable (gfc_symbol
*sym
, int mp_flag
)
12078 int no_init_flag
, automatic_flag
;
12080 const char *auto_save_msg
;
12081 bool saved_specification_expr
;
12083 auto_save_msg
= "Automatic object %qs at %L cannot have the "
12086 if (!resolve_fl_var_and_proc (sym
, mp_flag
))
12089 /* Set this flag to check that variables are parameters of all entries.
12090 This check is effected by the call to gfc_resolve_expr through
12091 is_non_constant_shape_array. */
12092 saved_specification_expr
= specification_expr
;
12093 specification_expr
= true;
12095 if (sym
->ns
->proc_name
12096 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12097 || sym
->ns
->proc_name
->attr
.is_main_program
)
12098 && !sym
->attr
.use_assoc
12099 && !sym
->attr
.allocatable
12100 && !sym
->attr
.pointer
12101 && is_non_constant_shape_array (sym
))
12103 /* F08:C541. The shape of an array defined in a main program or module
12104 * needs to be constant. */
12105 gfc_error ("The module or main program array %qs at %L must "
12106 "have constant shape", sym
->name
, &sym
->declared_at
);
12107 specification_expr
= saved_specification_expr
;
12111 /* Constraints on deferred type parameter. */
12112 if (!deferred_requirements (sym
))
12115 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.associate_var
)
12117 /* Make sure that character string variables with assumed length are
12118 dummy arguments. */
12119 e
= sym
->ts
.u
.cl
->length
;
12120 if (e
== NULL
&& !sym
->attr
.dummy
&& !sym
->attr
.result
12121 && !sym
->ts
.deferred
&& !sym
->attr
.select_type_temporary
12122 && !sym
->attr
.omp_udr_artificial_var
)
12124 gfc_error ("Entity with assumed character length at %L must be a "
12125 "dummy argument or a PARAMETER", &sym
->declared_at
);
12126 specification_expr
= saved_specification_expr
;
12130 if (e
&& sym
->attr
.save
== SAVE_EXPLICIT
&& !gfc_is_constant_expr (e
))
12132 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12133 specification_expr
= saved_specification_expr
;
12137 if (!gfc_is_constant_expr (e
)
12138 && !(e
->expr_type
== EXPR_VARIABLE
12139 && e
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
))
12141 if (!sym
->attr
.use_assoc
&& sym
->ns
->proc_name
12142 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12143 || sym
->ns
->proc_name
->attr
.is_main_program
))
12145 gfc_error ("%qs at %L must have constant character length "
12146 "in this context", sym
->name
, &sym
->declared_at
);
12147 specification_expr
= saved_specification_expr
;
12150 if (sym
->attr
.in_common
)
12152 gfc_error ("COMMON variable %qs at %L must have constant "
12153 "character length", sym
->name
, &sym
->declared_at
);
12154 specification_expr
= saved_specification_expr
;
12160 if (sym
->value
== NULL
&& sym
->attr
.referenced
)
12161 apply_default_init_local (sym
); /* Try to apply a default initialization. */
12163 /* Determine if the symbol may not have an initializer. */
12164 no_init_flag
= automatic_flag
= 0;
12165 if (sym
->attr
.allocatable
|| sym
->attr
.external
|| sym
->attr
.dummy
12166 || sym
->attr
.intrinsic
|| sym
->attr
.result
)
12168 else if ((sym
->attr
.dimension
|| sym
->attr
.codimension
) && !sym
->attr
.pointer
12169 && is_non_constant_shape_array (sym
))
12171 no_init_flag
= automatic_flag
= 1;
12173 /* Also, they must not have the SAVE attribute.
12174 SAVE_IMPLICIT is checked below. */
12175 if (sym
->as
&& sym
->attr
.codimension
)
12177 int corank
= sym
->as
->corank
;
12178 sym
->as
->corank
= 0;
12179 no_init_flag
= automatic_flag
= is_non_constant_shape_array (sym
);
12180 sym
->as
->corank
= corank
;
12182 if (automatic_flag
&& sym
->attr
.save
== SAVE_EXPLICIT
)
12184 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12185 specification_expr
= saved_specification_expr
;
12190 /* Ensure that any initializer is simplified. */
12192 gfc_simplify_expr (sym
->value
, 1);
12194 /* Reject illegal initializers. */
12195 if (!sym
->mark
&& sym
->value
)
12197 if (sym
->attr
.allocatable
|| (sym
->ts
.type
== BT_CLASS
12198 && CLASS_DATA (sym
)->attr
.allocatable
))
12199 gfc_error ("Allocatable %qs at %L cannot have an initializer",
12200 sym
->name
, &sym
->declared_at
);
12201 else if (sym
->attr
.external
)
12202 gfc_error ("External %qs at %L cannot have an initializer",
12203 sym
->name
, &sym
->declared_at
);
12204 else if (sym
->attr
.dummy
12205 && !(sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.intent
== INTENT_OUT
))
12206 gfc_error ("Dummy %qs at %L cannot have an initializer",
12207 sym
->name
, &sym
->declared_at
);
12208 else if (sym
->attr
.intrinsic
)
12209 gfc_error ("Intrinsic %qs at %L cannot have an initializer",
12210 sym
->name
, &sym
->declared_at
);
12211 else if (sym
->attr
.result
)
12212 gfc_error ("Function result %qs at %L cannot have an initializer",
12213 sym
->name
, &sym
->declared_at
);
12214 else if (automatic_flag
)
12215 gfc_error ("Automatic array %qs at %L cannot have an initializer",
12216 sym
->name
, &sym
->declared_at
);
12218 goto no_init_error
;
12219 specification_expr
= saved_specification_expr
;
12224 if (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
)
12226 bool res
= resolve_fl_variable_derived (sym
, no_init_flag
);
12227 specification_expr
= saved_specification_expr
;
12231 specification_expr
= saved_specification_expr
;
12236 /* Compare the dummy characteristics of a module procedure interface
12237 declaration with the corresponding declaration in a submodule. */
12238 static gfc_formal_arglist
*new_formal
;
12239 static char errmsg
[200];
12242 compare_fsyms (gfc_symbol
*sym
)
12246 if (sym
== NULL
|| new_formal
== NULL
)
12249 fsym
= new_formal
->sym
;
12254 if (strcmp (sym
->name
, fsym
->name
) == 0)
12256 if (!gfc_check_dummy_characteristics (fsym
, sym
, true, errmsg
, 200))
12257 gfc_error ("%s at %L", errmsg
, &fsym
->declared_at
);
12262 /* Resolve a procedure. */
12265 resolve_fl_procedure (gfc_symbol
*sym
, int mp_flag
)
12267 gfc_formal_arglist
*arg
;
12269 if (sym
->attr
.function
12270 && !resolve_fl_var_and_proc (sym
, mp_flag
))
12273 if (sym
->ts
.type
== BT_CHARACTER
)
12275 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
12277 if (cl
&& cl
->length
&& gfc_is_constant_expr (cl
->length
)
12278 && !resolve_charlen (cl
))
12281 if ((!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
12282 && sym
->attr
.proc
== PROC_ST_FUNCTION
)
12284 gfc_error ("Character-valued statement function %qs at %L must "
12285 "have constant length", sym
->name
, &sym
->declared_at
);
12290 /* Ensure that derived type for are not of a private type. Internal
12291 module procedures are excluded by 2.2.3.3 - i.e., they are not
12292 externally accessible and can access all the objects accessible in
12294 if (!(sym
->ns
->parent
12295 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12296 && gfc_check_symbol_access (sym
))
12298 gfc_interface
*iface
;
12300 for (arg
= gfc_sym_get_dummy_args (sym
); arg
; arg
= arg
->next
)
12303 && arg
->sym
->ts
.type
== BT_DERIVED
12304 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12305 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12306 && !gfc_notify_std (GFC_STD_F2003
, "%qs is of a PRIVATE type "
12307 "and cannot be a dummy argument"
12308 " of %qs, which is PUBLIC at %L",
12309 arg
->sym
->name
, sym
->name
,
12310 &sym
->declared_at
))
12312 /* Stop this message from recurring. */
12313 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12318 /* PUBLIC interfaces may expose PRIVATE procedures that take types
12319 PRIVATE to the containing module. */
12320 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
12322 for (arg
= gfc_sym_get_dummy_args (iface
->sym
); arg
; arg
= arg
->next
)
12325 && arg
->sym
->ts
.type
== BT_DERIVED
12326 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12327 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12328 && !gfc_notify_std (GFC_STD_F2003
, "Procedure %qs in "
12329 "PUBLIC interface %qs at %L "
12330 "takes dummy arguments of %qs which "
12331 "is PRIVATE", iface
->sym
->name
,
12332 sym
->name
, &iface
->sym
->declared_at
,
12333 gfc_typename(&arg
->sym
->ts
)))
12335 /* Stop this message from recurring. */
12336 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12343 if (sym
->attr
.function
&& sym
->value
&& sym
->attr
.proc
!= PROC_ST_FUNCTION
12344 && !sym
->attr
.proc_pointer
)
12346 gfc_error ("Function %qs at %L cannot have an initializer",
12347 sym
->name
, &sym
->declared_at
);
12351 /* An external symbol may not have an initializer because it is taken to be
12352 a procedure. Exception: Procedure Pointers. */
12353 if (sym
->attr
.external
&& sym
->value
&& !sym
->attr
.proc_pointer
)
12355 gfc_error ("External object %qs at %L may not have an initializer",
12356 sym
->name
, &sym
->declared_at
);
12360 /* An elemental function is required to return a scalar 12.7.1 */
12361 if (sym
->attr
.elemental
&& sym
->attr
.function
&& sym
->as
)
12363 gfc_error ("ELEMENTAL function %qs at %L must have a scalar "
12364 "result", sym
->name
, &sym
->declared_at
);
12365 /* Reset so that the error only occurs once. */
12366 sym
->attr
.elemental
= 0;
12370 if (sym
->attr
.proc
== PROC_ST_FUNCTION
12371 && (sym
->attr
.allocatable
|| sym
->attr
.pointer
))
12373 gfc_error ("Statement function %qs at %L may not have pointer or "
12374 "allocatable attribute", sym
->name
, &sym
->declared_at
);
12378 /* 5.1.1.5 of the Standard: A function name declared with an asterisk
12379 char-len-param shall not be array-valued, pointer-valued, recursive
12380 or pure. ....snip... A character value of * may only be used in the
12381 following ways: (i) Dummy arg of procedure - dummy associates with
12382 actual length; (ii) To declare a named constant; or (iii) External
12383 function - but length must be declared in calling scoping unit. */
12384 if (sym
->attr
.function
12385 && sym
->ts
.type
== BT_CHARACTER
&& !sym
->ts
.deferred
12386 && sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
== NULL
)
12388 if ((sym
->as
&& sym
->as
->rank
) || (sym
->attr
.pointer
)
12389 || (sym
->attr
.recursive
) || (sym
->attr
.pure
))
12391 if (sym
->as
&& sym
->as
->rank
)
12392 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12393 "array-valued", sym
->name
, &sym
->declared_at
);
12395 if (sym
->attr
.pointer
)
12396 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12397 "pointer-valued", sym
->name
, &sym
->declared_at
);
12399 if (sym
->attr
.pure
)
12400 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12401 "pure", sym
->name
, &sym
->declared_at
);
12403 if (sym
->attr
.recursive
)
12404 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12405 "recursive", sym
->name
, &sym
->declared_at
);
12410 /* Appendix B.2 of the standard. Contained functions give an
12411 error anyway. Deferred character length is an F2003 feature.
12412 Don't warn on intrinsic conversion functions, which start
12413 with two underscores. */
12414 if (!sym
->attr
.contained
&& !sym
->ts
.deferred
12415 && (sym
->name
[0] != '_' || sym
->name
[1] != '_'))
12416 gfc_notify_std (GFC_STD_F95_OBS
,
12417 "CHARACTER(*) function %qs at %L",
12418 sym
->name
, &sym
->declared_at
);
12421 /* F2008, C1218. */
12422 if (sym
->attr
.elemental
)
12424 if (sym
->attr
.proc_pointer
)
12426 gfc_error ("Procedure pointer %qs at %L shall not be elemental",
12427 sym
->name
, &sym
->declared_at
);
12430 if (sym
->attr
.dummy
)
12432 gfc_error ("Dummy procedure %qs at %L shall not be elemental",
12433 sym
->name
, &sym
->declared_at
);
12438 if (sym
->attr
.is_bind_c
&& sym
->attr
.is_c_interop
!= 1)
12440 gfc_formal_arglist
*curr_arg
;
12441 int has_non_interop_arg
= 0;
12443 if (!verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
12444 sym
->common_block
))
12446 /* Clear these to prevent looking at them again if there was an
12448 sym
->attr
.is_bind_c
= 0;
12449 sym
->attr
.is_c_interop
= 0;
12450 sym
->ts
.is_c_interop
= 0;
12454 /* So far, no errors have been found. */
12455 sym
->attr
.is_c_interop
= 1;
12456 sym
->ts
.is_c_interop
= 1;
12459 curr_arg
= gfc_sym_get_dummy_args (sym
);
12460 while (curr_arg
!= NULL
)
12462 /* Skip implicitly typed dummy args here. */
12463 if (curr_arg
->sym
->attr
.implicit_type
== 0)
12464 if (!gfc_verify_c_interop_param (curr_arg
->sym
))
12465 /* If something is found to fail, record the fact so we
12466 can mark the symbol for the procedure as not being
12467 BIND(C) to try and prevent multiple errors being
12469 has_non_interop_arg
= 1;
12471 curr_arg
= curr_arg
->next
;
12474 /* See if any of the arguments were not interoperable and if so, clear
12475 the procedure symbol to prevent duplicate error messages. */
12476 if (has_non_interop_arg
!= 0)
12478 sym
->attr
.is_c_interop
= 0;
12479 sym
->ts
.is_c_interop
= 0;
12480 sym
->attr
.is_bind_c
= 0;
12484 if (!sym
->attr
.proc_pointer
)
12486 if (sym
->attr
.save
== SAVE_EXPLICIT
)
12488 gfc_error ("PROCEDURE attribute conflicts with SAVE attribute "
12489 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12492 if (sym
->attr
.intent
)
12494 gfc_error ("PROCEDURE attribute conflicts with INTENT attribute "
12495 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12498 if (sym
->attr
.subroutine
&& sym
->attr
.result
)
12500 gfc_error ("PROCEDURE attribute conflicts with RESULT attribute "
12501 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12504 if (sym
->attr
.external
&& sym
->attr
.function
&& !sym
->attr
.module_procedure
12505 && ((sym
->attr
.if_source
== IFSRC_DECL
&& !sym
->attr
.procedure
)
12506 || sym
->attr
.contained
))
12508 gfc_error ("EXTERNAL attribute conflicts with FUNCTION attribute "
12509 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12512 if (strcmp ("ppr@", sym
->name
) == 0)
12514 gfc_error ("Procedure pointer result %qs at %L "
12515 "is missing the pointer attribute",
12516 sym
->ns
->proc_name
->name
, &sym
->declared_at
);
12521 /* Assume that a procedure whose body is not known has references
12522 to external arrays. */
12523 if (sym
->attr
.if_source
!= IFSRC_DECL
)
12524 sym
->attr
.array_outer_dependency
= 1;
12526 /* Compare the characteristics of a module procedure with the
12527 interface declaration. Ideally this would be done with
12528 gfc_compare_interfaces but, at present, the formal interface
12529 cannot be copied to the ts.interface. */
12530 if (sym
->attr
.module_procedure
12531 && sym
->attr
.if_source
== IFSRC_DECL
)
12534 char name
[2*GFC_MAX_SYMBOL_LEN
+ 1];
12536 char *submodule_name
;
12537 strcpy (name
, sym
->ns
->proc_name
->name
);
12538 module_name
= strtok (name
, ".");
12539 submodule_name
= strtok (NULL
, ".");
12541 iface
= sym
->tlink
;
12544 /* Make sure that the result uses the correct charlen for deferred
12546 if (iface
&& sym
->result
12547 && iface
->ts
.type
== BT_CHARACTER
12548 && iface
->ts
.deferred
)
12549 sym
->result
->ts
.u
.cl
= iface
->ts
.u
.cl
;
12554 /* Check the procedure characteristics. */
12555 if (sym
->attr
.elemental
!= iface
->attr
.elemental
)
12557 gfc_error ("Mismatch in ELEMENTAL attribute between MODULE "
12558 "PROCEDURE at %L and its interface in %s",
12559 &sym
->declared_at
, module_name
);
12563 if (sym
->attr
.pure
!= iface
->attr
.pure
)
12565 gfc_error ("Mismatch in PURE attribute between MODULE "
12566 "PROCEDURE at %L and its interface in %s",
12567 &sym
->declared_at
, module_name
);
12571 if (sym
->attr
.recursive
!= iface
->attr
.recursive
)
12573 gfc_error ("Mismatch in RECURSIVE attribute between MODULE "
12574 "PROCEDURE at %L and its interface in %s",
12575 &sym
->declared_at
, module_name
);
12579 /* Check the result characteristics. */
12580 if (!gfc_check_result_characteristics (sym
, iface
, errmsg
, 200))
12582 gfc_error ("%s between the MODULE PROCEDURE declaration "
12583 "in MODULE %qs and the declaration at %L in "
12585 errmsg
, module_name
, &sym
->declared_at
,
12586 submodule_name
? submodule_name
: module_name
);
12591 /* Check the characteristics of the formal arguments. */
12592 if (sym
->formal
&& sym
->formal_ns
)
12594 for (arg
= sym
->formal
; arg
&& arg
->sym
; arg
= arg
->next
)
12597 gfc_traverse_ns (sym
->formal_ns
, compare_fsyms
);
12605 /* Resolve a list of finalizer procedures. That is, after they have hopefully
12606 been defined and we now know their defined arguments, check that they fulfill
12607 the requirements of the standard for procedures used as finalizers. */
12610 gfc_resolve_finalizers (gfc_symbol
* derived
, bool *finalizable
)
12612 gfc_finalizer
* list
;
12613 gfc_finalizer
** prev_link
; /* For removing wrong entries from the list. */
12614 bool result
= true;
12615 bool seen_scalar
= false;
12618 gfc_symbol
*parent
= gfc_get_derived_super_type (derived
);
12621 gfc_resolve_finalizers (parent
, finalizable
);
12623 /* Ensure that derived-type components have a their finalizers resolved. */
12624 bool has_final
= derived
->f2k_derived
&& derived
->f2k_derived
->finalizers
;
12625 for (c
= derived
->components
; c
; c
= c
->next
)
12626 if (c
->ts
.type
== BT_DERIVED
12627 && !c
->attr
.pointer
&& !c
->attr
.proc_pointer
&& !c
->attr
.allocatable
)
12629 bool has_final2
= false;
12630 if (!gfc_resolve_finalizers (c
->ts
.u
.derived
, &has_final2
))
12631 return false; /* Error. */
12632 has_final
= has_final
|| has_final2
;
12634 /* Return early if not finalizable. */
12638 *finalizable
= false;
12642 /* Walk over the list of finalizer-procedures, check them, and if any one
12643 does not fit in with the standard's definition, print an error and remove
12644 it from the list. */
12645 prev_link
= &derived
->f2k_derived
->finalizers
;
12646 for (list
= derived
->f2k_derived
->finalizers
; list
; list
= *prev_link
)
12648 gfc_formal_arglist
*dummy_args
;
12653 /* Skip this finalizer if we already resolved it. */
12654 if (list
->proc_tree
)
12656 if (list
->proc_tree
->n
.sym
->formal
->sym
->as
== NULL
12657 || list
->proc_tree
->n
.sym
->formal
->sym
->as
->rank
== 0)
12658 seen_scalar
= true;
12659 prev_link
= &(list
->next
);
12663 /* Check this exists and is a SUBROUTINE. */
12664 if (!list
->proc_sym
->attr
.subroutine
)
12666 gfc_error ("FINAL procedure %qs at %L is not a SUBROUTINE",
12667 list
->proc_sym
->name
, &list
->where
);
12671 /* We should have exactly one argument. */
12672 dummy_args
= gfc_sym_get_dummy_args (list
->proc_sym
);
12673 if (!dummy_args
|| dummy_args
->next
)
12675 gfc_error ("FINAL procedure at %L must have exactly one argument",
12679 arg
= dummy_args
->sym
;
12681 /* This argument must be of our type. */
12682 if (arg
->ts
.type
!= BT_DERIVED
|| arg
->ts
.u
.derived
!= derived
)
12684 gfc_error ("Argument of FINAL procedure at %L must be of type %qs",
12685 &arg
->declared_at
, derived
->name
);
12689 /* It must neither be a pointer nor allocatable nor optional. */
12690 if (arg
->attr
.pointer
)
12692 gfc_error ("Argument of FINAL procedure at %L must not be a POINTER",
12693 &arg
->declared_at
);
12696 if (arg
->attr
.allocatable
)
12698 gfc_error ("Argument of FINAL procedure at %L must not be"
12699 " ALLOCATABLE", &arg
->declared_at
);
12702 if (arg
->attr
.optional
)
12704 gfc_error ("Argument of FINAL procedure at %L must not be OPTIONAL",
12705 &arg
->declared_at
);
12709 /* It must not be INTENT(OUT). */
12710 if (arg
->attr
.intent
== INTENT_OUT
)
12712 gfc_error ("Argument of FINAL procedure at %L must not be"
12713 " INTENT(OUT)", &arg
->declared_at
);
12717 /* Warn if the procedure is non-scalar and not assumed shape. */
12718 if (warn_surprising
&& arg
->as
&& arg
->as
->rank
!= 0
12719 && arg
->as
->type
!= AS_ASSUMED_SHAPE
)
12720 gfc_warning (OPT_Wsurprising
,
12721 "Non-scalar FINAL procedure at %L should have assumed"
12722 " shape argument", &arg
->declared_at
);
12724 /* Check that it does not match in kind and rank with a FINAL procedure
12725 defined earlier. To really loop over the *earlier* declarations,
12726 we need to walk the tail of the list as new ones were pushed at the
12728 /* TODO: Handle kind parameters once they are implemented. */
12729 my_rank
= (arg
->as
? arg
->as
->rank
: 0);
12730 for (i
= list
->next
; i
; i
= i
->next
)
12732 gfc_formal_arglist
*dummy_args
;
12734 /* Argument list might be empty; that is an error signalled earlier,
12735 but we nevertheless continued resolving. */
12736 dummy_args
= gfc_sym_get_dummy_args (i
->proc_sym
);
12739 gfc_symbol
* i_arg
= dummy_args
->sym
;
12740 const int i_rank
= (i_arg
->as
? i_arg
->as
->rank
: 0);
12741 if (i_rank
== my_rank
)
12743 gfc_error ("FINAL procedure %qs declared at %L has the same"
12744 " rank (%d) as %qs",
12745 list
->proc_sym
->name
, &list
->where
, my_rank
,
12746 i
->proc_sym
->name
);
12752 /* Is this the/a scalar finalizer procedure? */
12754 seen_scalar
= true;
12756 /* Find the symtree for this procedure. */
12757 gcc_assert (!list
->proc_tree
);
12758 list
->proc_tree
= gfc_find_sym_in_symtree (list
->proc_sym
);
12760 prev_link
= &list
->next
;
12763 /* Remove wrong nodes immediately from the list so we don't risk any
12764 troubles in the future when they might fail later expectations. */
12767 *prev_link
= list
->next
;
12768 gfc_free_finalizer (i
);
12772 if (result
== false)
12775 /* Warn if we haven't seen a scalar finalizer procedure (but we know there
12776 were nodes in the list, must have been for arrays. It is surely a good
12777 idea to have a scalar version there if there's something to finalize. */
12778 if (warn_surprising
&& derived
->f2k_derived
->finalizers
&& !seen_scalar
)
12779 gfc_warning (OPT_Wsurprising
,
12780 "Only array FINAL procedures declared for derived type %qs"
12781 " defined at %L, suggest also scalar one",
12782 derived
->name
, &derived
->declared_at
);
12784 vtab
= gfc_find_derived_vtab (derived
);
12785 c
= vtab
->ts
.u
.derived
->components
->next
->next
->next
->next
->next
;
12786 gfc_set_sym_referenced (c
->initializer
->symtree
->n
.sym
);
12789 *finalizable
= true;
12795 /* Check if two GENERIC targets are ambiguous and emit an error is they are. */
12798 check_generic_tbp_ambiguity (gfc_tbp_generic
* t1
, gfc_tbp_generic
* t2
,
12799 const char* generic_name
, locus where
)
12801 gfc_symbol
*sym1
, *sym2
;
12802 const char *pass1
, *pass2
;
12803 gfc_formal_arglist
*dummy_args
;
12805 gcc_assert (t1
->specific
&& t2
->specific
);
12806 gcc_assert (!t1
->specific
->is_generic
);
12807 gcc_assert (!t2
->specific
->is_generic
);
12808 gcc_assert (t1
->is_operator
== t2
->is_operator
);
12810 sym1
= t1
->specific
->u
.specific
->n
.sym
;
12811 sym2
= t2
->specific
->u
.specific
->n
.sym
;
12816 /* Both must be SUBROUTINEs or both must be FUNCTIONs. */
12817 if (sym1
->attr
.subroutine
!= sym2
->attr
.subroutine
12818 || sym1
->attr
.function
!= sym2
->attr
.function
)
12820 gfc_error ("%qs and %qs can't be mixed FUNCTION/SUBROUTINE for"
12821 " GENERIC %qs at %L",
12822 sym1
->name
, sym2
->name
, generic_name
, &where
);
12826 /* Determine PASS arguments. */
12827 if (t1
->specific
->nopass
)
12829 else if (t1
->specific
->pass_arg
)
12830 pass1
= t1
->specific
->pass_arg
;
12833 dummy_args
= gfc_sym_get_dummy_args (t1
->specific
->u
.specific
->n
.sym
);
12835 pass1
= dummy_args
->sym
->name
;
12839 if (t2
->specific
->nopass
)
12841 else if (t2
->specific
->pass_arg
)
12842 pass2
= t2
->specific
->pass_arg
;
12845 dummy_args
= gfc_sym_get_dummy_args (t2
->specific
->u
.specific
->n
.sym
);
12847 pass2
= dummy_args
->sym
->name
;
12852 /* Compare the interfaces. */
12853 if (gfc_compare_interfaces (sym1
, sym2
, sym2
->name
, !t1
->is_operator
, 0,
12854 NULL
, 0, pass1
, pass2
))
12856 gfc_error ("%qs and %qs for GENERIC %qs at %L are ambiguous",
12857 sym1
->name
, sym2
->name
, generic_name
, &where
);
12865 /* Worker function for resolving a generic procedure binding; this is used to
12866 resolve GENERIC as well as user and intrinsic OPERATOR typebound procedures.
12868 The difference between those cases is finding possible inherited bindings
12869 that are overridden, as one has to look for them in tb_sym_root,
12870 tb_uop_root or tb_op, respectively. Thus the caller must already find
12871 the super-type and set p->overridden correctly. */
12874 resolve_tb_generic_targets (gfc_symbol
* super_type
,
12875 gfc_typebound_proc
* p
, const char* name
)
12877 gfc_tbp_generic
* target
;
12878 gfc_symtree
* first_target
;
12879 gfc_symtree
* inherited
;
12881 gcc_assert (p
&& p
->is_generic
);
12883 /* Try to find the specific bindings for the symtrees in our target-list. */
12884 gcc_assert (p
->u
.generic
);
12885 for (target
= p
->u
.generic
; target
; target
= target
->next
)
12886 if (!target
->specific
)
12888 gfc_typebound_proc
* overridden_tbp
;
12889 gfc_tbp_generic
* g
;
12890 const char* target_name
;
12892 target_name
= target
->specific_st
->name
;
12894 /* Defined for this type directly. */
12895 if (target
->specific_st
->n
.tb
&& !target
->specific_st
->n
.tb
->error
)
12897 target
->specific
= target
->specific_st
->n
.tb
;
12898 goto specific_found
;
12901 /* Look for an inherited specific binding. */
12904 inherited
= gfc_find_typebound_proc (super_type
, NULL
, target_name
,
12909 gcc_assert (inherited
->n
.tb
);
12910 target
->specific
= inherited
->n
.tb
;
12911 goto specific_found
;
12915 gfc_error ("Undefined specific binding %qs as target of GENERIC %qs"
12916 " at %L", target_name
, name
, &p
->where
);
12919 /* Once we've found the specific binding, check it is not ambiguous with
12920 other specifics already found or inherited for the same GENERIC. */
12922 gcc_assert (target
->specific
);
12924 /* This must really be a specific binding! */
12925 if (target
->specific
->is_generic
)
12927 gfc_error ("GENERIC %qs at %L must target a specific binding,"
12928 " %qs is GENERIC, too", name
, &p
->where
, target_name
);
12932 /* Check those already resolved on this type directly. */
12933 for (g
= p
->u
.generic
; g
; g
= g
->next
)
12934 if (g
!= target
&& g
->specific
12935 && !check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
12938 /* Check for ambiguity with inherited specific targets. */
12939 for (overridden_tbp
= p
->overridden
; overridden_tbp
;
12940 overridden_tbp
= overridden_tbp
->overridden
)
12941 if (overridden_tbp
->is_generic
)
12943 for (g
= overridden_tbp
->u
.generic
; g
; g
= g
->next
)
12945 gcc_assert (g
->specific
);
12946 if (!check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
12952 /* If we attempt to "overwrite" a specific binding, this is an error. */
12953 if (p
->overridden
&& !p
->overridden
->is_generic
)
12955 gfc_error ("GENERIC %qs at %L can't overwrite specific binding with"
12956 " the same name", name
, &p
->where
);
12960 /* Take the SUBROUTINE/FUNCTION attributes of the first specific target, as
12961 all must have the same attributes here. */
12962 first_target
= p
->u
.generic
->specific
->u
.specific
;
12963 gcc_assert (first_target
);
12964 p
->subroutine
= first_target
->n
.sym
->attr
.subroutine
;
12965 p
->function
= first_target
->n
.sym
->attr
.function
;
12971 /* Resolve a GENERIC procedure binding for a derived type. */
12974 resolve_typebound_generic (gfc_symbol
* derived
, gfc_symtree
* st
)
12976 gfc_symbol
* super_type
;
12978 /* Find the overridden binding if any. */
12979 st
->n
.tb
->overridden
= NULL
;
12980 super_type
= gfc_get_derived_super_type (derived
);
12983 gfc_symtree
* overridden
;
12984 overridden
= gfc_find_typebound_proc (super_type
, NULL
, st
->name
,
12987 if (overridden
&& overridden
->n
.tb
)
12988 st
->n
.tb
->overridden
= overridden
->n
.tb
;
12991 /* Resolve using worker function. */
12992 return resolve_tb_generic_targets (super_type
, st
->n
.tb
, st
->name
);
12996 /* Retrieve the target-procedure of an operator binding and do some checks in
12997 common for intrinsic and user-defined type-bound operators. */
13000 get_checked_tb_operator_target (gfc_tbp_generic
* target
, locus where
)
13002 gfc_symbol
* target_proc
;
13004 gcc_assert (target
->specific
&& !target
->specific
->is_generic
);
13005 target_proc
= target
->specific
->u
.specific
->n
.sym
;
13006 gcc_assert (target_proc
);
13008 /* F08:C468. All operator bindings must have a passed-object dummy argument. */
13009 if (target
->specific
->nopass
)
13011 gfc_error ("Type-bound operator at %L can't be NOPASS", &where
);
13015 return target_proc
;
13019 /* Resolve a type-bound intrinsic operator. */
13022 resolve_typebound_intrinsic_op (gfc_symbol
* derived
, gfc_intrinsic_op op
,
13023 gfc_typebound_proc
* p
)
13025 gfc_symbol
* super_type
;
13026 gfc_tbp_generic
* target
;
13028 /* If there's already an error here, do nothing (but don't fail again). */
13032 /* Operators should always be GENERIC bindings. */
13033 gcc_assert (p
->is_generic
);
13035 /* Look for an overridden binding. */
13036 super_type
= gfc_get_derived_super_type (derived
);
13037 if (super_type
&& super_type
->f2k_derived
)
13038 p
->overridden
= gfc_find_typebound_intrinsic_op (super_type
, NULL
,
13041 p
->overridden
= NULL
;
13043 /* Resolve general GENERIC properties using worker function. */
13044 if (!resolve_tb_generic_targets (super_type
, p
, gfc_op2string(op
)))
13047 /* Check the targets to be procedures of correct interface. */
13048 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13050 gfc_symbol
* target_proc
;
13052 target_proc
= get_checked_tb_operator_target (target
, p
->where
);
13056 if (!gfc_check_operator_interface (target_proc
, op
, p
->where
))
13059 /* Add target to non-typebound operator list. */
13060 if (!target
->specific
->deferred
&& !derived
->attr
.use_assoc
13061 && p
->access
!= ACCESS_PRIVATE
&& derived
->ns
== gfc_current_ns
)
13063 gfc_interface
*head
, *intr
;
13065 /* Preempt 'gfc_check_new_interface' for submodules, where the
13066 mechanism for handling module procedures winds up resolving
13067 operator interfaces twice and would otherwise cause an error. */
13068 for (intr
= derived
->ns
->op
[op
]; intr
; intr
= intr
->next
)
13069 if (intr
->sym
== target_proc
13070 && target_proc
->attr
.used_in_submodule
)
13073 if (!gfc_check_new_interface (derived
->ns
->op
[op
],
13074 target_proc
, p
->where
))
13076 head
= derived
->ns
->op
[op
];
13077 intr
= gfc_get_interface ();
13078 intr
->sym
= target_proc
;
13079 intr
->where
= p
->where
;
13081 derived
->ns
->op
[op
] = intr
;
13093 /* Resolve a type-bound user operator (tree-walker callback). */
13095 static gfc_symbol
* resolve_bindings_derived
;
13096 static bool resolve_bindings_result
;
13098 static bool check_uop_procedure (gfc_symbol
* sym
, locus where
);
13101 resolve_typebound_user_op (gfc_symtree
* stree
)
13103 gfc_symbol
* super_type
;
13104 gfc_tbp_generic
* target
;
13106 gcc_assert (stree
&& stree
->n
.tb
);
13108 if (stree
->n
.tb
->error
)
13111 /* Operators should always be GENERIC bindings. */
13112 gcc_assert (stree
->n
.tb
->is_generic
);
13114 /* Find overridden procedure, if any. */
13115 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13116 if (super_type
&& super_type
->f2k_derived
)
13118 gfc_symtree
* overridden
;
13119 overridden
= gfc_find_typebound_user_op (super_type
, NULL
,
13120 stree
->name
, true, NULL
);
13122 if (overridden
&& overridden
->n
.tb
)
13123 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13126 stree
->n
.tb
->overridden
= NULL
;
13128 /* Resolve basically using worker function. */
13129 if (!resolve_tb_generic_targets (super_type
, stree
->n
.tb
, stree
->name
))
13132 /* Check the targets to be functions of correct interface. */
13133 for (target
= stree
->n
.tb
->u
.generic
; target
; target
= target
->next
)
13135 gfc_symbol
* target_proc
;
13137 target_proc
= get_checked_tb_operator_target (target
, stree
->n
.tb
->where
);
13141 if (!check_uop_procedure (target_proc
, stree
->n
.tb
->where
))
13148 resolve_bindings_result
= false;
13149 stree
->n
.tb
->error
= 1;
13153 /* Resolve the type-bound procedures for a derived type. */
13156 resolve_typebound_procedure (gfc_symtree
* stree
)
13160 gfc_symbol
* me_arg
;
13161 gfc_symbol
* super_type
;
13162 gfc_component
* comp
;
13164 gcc_assert (stree
);
13166 /* Undefined specific symbol from GENERIC target definition. */
13170 if (stree
->n
.tb
->error
)
13173 /* If this is a GENERIC binding, use that routine. */
13174 if (stree
->n
.tb
->is_generic
)
13176 if (!resolve_typebound_generic (resolve_bindings_derived
, stree
))
13181 /* Get the target-procedure to check it. */
13182 gcc_assert (!stree
->n
.tb
->is_generic
);
13183 gcc_assert (stree
->n
.tb
->u
.specific
);
13184 proc
= stree
->n
.tb
->u
.specific
->n
.sym
;
13185 where
= stree
->n
.tb
->where
;
13187 /* Default access should already be resolved from the parser. */
13188 gcc_assert (stree
->n
.tb
->access
!= ACCESS_UNKNOWN
);
13190 if (stree
->n
.tb
->deferred
)
13192 if (!check_proc_interface (proc
, &where
))
13197 /* Check for F08:C465. */
13198 if ((!proc
->attr
.subroutine
&& !proc
->attr
.function
)
13199 || (proc
->attr
.proc
!= PROC_MODULE
13200 && proc
->attr
.if_source
!= IFSRC_IFBODY
)
13201 || proc
->attr
.abstract
)
13203 gfc_error ("%qs must be a module procedure or an external procedure with"
13204 " an explicit interface at %L", proc
->name
, &where
);
13209 stree
->n
.tb
->subroutine
= proc
->attr
.subroutine
;
13210 stree
->n
.tb
->function
= proc
->attr
.function
;
13212 /* Find the super-type of the current derived type. We could do this once and
13213 store in a global if speed is needed, but as long as not I believe this is
13214 more readable and clearer. */
13215 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13217 /* If PASS, resolve and check arguments if not already resolved / loaded
13218 from a .mod file. */
13219 if (!stree
->n
.tb
->nopass
&& stree
->n
.tb
->pass_arg_num
== 0)
13221 gfc_formal_arglist
*dummy_args
;
13223 dummy_args
= gfc_sym_get_dummy_args (proc
);
13224 if (stree
->n
.tb
->pass_arg
)
13226 gfc_formal_arglist
*i
;
13228 /* If an explicit passing argument name is given, walk the arg-list
13229 and look for it. */
13232 stree
->n
.tb
->pass_arg_num
= 1;
13233 for (i
= dummy_args
; i
; i
= i
->next
)
13235 if (!strcmp (i
->sym
->name
, stree
->n
.tb
->pass_arg
))
13240 ++stree
->n
.tb
->pass_arg_num
;
13245 gfc_error ("Procedure %qs with PASS(%s) at %L has no"
13247 proc
->name
, stree
->n
.tb
->pass_arg
, &where
,
13248 stree
->n
.tb
->pass_arg
);
13254 /* Otherwise, take the first one; there should in fact be at least
13256 stree
->n
.tb
->pass_arg_num
= 1;
13259 gfc_error ("Procedure %qs with PASS at %L must have at"
13260 " least one argument", proc
->name
, &where
);
13263 me_arg
= dummy_args
->sym
;
13266 /* Now check that the argument-type matches and the passed-object
13267 dummy argument is generally fine. */
13269 gcc_assert (me_arg
);
13271 if (me_arg
->ts
.type
!= BT_CLASS
)
13273 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13274 " at %L", proc
->name
, &where
);
13278 if (CLASS_DATA (me_arg
)->ts
.u
.derived
13279 != resolve_bindings_derived
)
13281 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13282 " the derived-type %qs", me_arg
->name
, proc
->name
,
13283 me_arg
->name
, &where
, resolve_bindings_derived
->name
);
13287 gcc_assert (me_arg
->ts
.type
== BT_CLASS
);
13288 if (CLASS_DATA (me_arg
)->as
&& CLASS_DATA (me_arg
)->as
->rank
!= 0)
13290 gfc_error ("Passed-object dummy argument of %qs at %L must be"
13291 " scalar", proc
->name
, &where
);
13294 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13296 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13297 " be ALLOCATABLE", proc
->name
, &where
);
13300 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13302 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13303 " be POINTER", proc
->name
, &where
);
13308 /* If we are extending some type, check that we don't override a procedure
13309 flagged NON_OVERRIDABLE. */
13310 stree
->n
.tb
->overridden
= NULL
;
13313 gfc_symtree
* overridden
;
13314 overridden
= gfc_find_typebound_proc (super_type
, NULL
,
13315 stree
->name
, true, NULL
);
13319 if (overridden
->n
.tb
)
13320 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13322 if (!gfc_check_typebound_override (stree
, overridden
))
13327 /* See if there's a name collision with a component directly in this type. */
13328 for (comp
= resolve_bindings_derived
->components
; comp
; comp
= comp
->next
)
13329 if (!strcmp (comp
->name
, stree
->name
))
13331 gfc_error ("Procedure %qs at %L has the same name as a component of"
13333 stree
->name
, &where
, resolve_bindings_derived
->name
);
13337 /* Try to find a name collision with an inherited component. */
13338 if (super_type
&& gfc_find_component (super_type
, stree
->name
, true, true,
13341 gfc_error ("Procedure %qs at %L has the same name as an inherited"
13342 " component of %qs",
13343 stree
->name
, &where
, resolve_bindings_derived
->name
);
13347 stree
->n
.tb
->error
= 0;
13351 resolve_bindings_result
= false;
13352 stree
->n
.tb
->error
= 1;
13357 resolve_typebound_procedures (gfc_symbol
* derived
)
13360 gfc_symbol
* super_type
;
13362 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->tb_sym_root
)
13365 super_type
= gfc_get_derived_super_type (derived
);
13367 resolve_symbol (super_type
);
13369 resolve_bindings_derived
= derived
;
13370 resolve_bindings_result
= true;
13372 if (derived
->f2k_derived
->tb_sym_root
)
13373 gfc_traverse_symtree (derived
->f2k_derived
->tb_sym_root
,
13374 &resolve_typebound_procedure
);
13376 if (derived
->f2k_derived
->tb_uop_root
)
13377 gfc_traverse_symtree (derived
->f2k_derived
->tb_uop_root
,
13378 &resolve_typebound_user_op
);
13380 for (op
= 0; op
!= GFC_INTRINSIC_OPS
; ++op
)
13382 gfc_typebound_proc
* p
= derived
->f2k_derived
->tb_op
[op
];
13383 if (p
&& !resolve_typebound_intrinsic_op (derived
,
13384 (gfc_intrinsic_op
)op
, p
))
13385 resolve_bindings_result
= false;
13388 return resolve_bindings_result
;
13392 /* Add a derived type to the dt_list. The dt_list is used in trans-types.c
13393 to give all identical derived types the same backend_decl. */
13395 add_dt_to_dt_list (gfc_symbol
*derived
)
13397 gfc_dt_list
*dt_list
;
13399 for (dt_list
= gfc_derived_types
; dt_list
; dt_list
= dt_list
->next
)
13400 if (derived
== dt_list
->derived
)
13403 dt_list
= gfc_get_dt_list ();
13404 dt_list
->next
= gfc_derived_types
;
13405 dt_list
->derived
= derived
;
13406 gfc_derived_types
= dt_list
;
13410 /* Ensure that a derived-type is really not abstract, meaning that every
13411 inherited DEFERRED binding is overridden by a non-DEFERRED one. */
13414 ensure_not_abstract_walker (gfc_symbol
* sub
, gfc_symtree
* st
)
13419 if (!ensure_not_abstract_walker (sub
, st
->left
))
13421 if (!ensure_not_abstract_walker (sub
, st
->right
))
13424 if (st
->n
.tb
&& st
->n
.tb
->deferred
)
13426 gfc_symtree
* overriding
;
13427 overriding
= gfc_find_typebound_proc (sub
, NULL
, st
->name
, true, NULL
);
13430 gcc_assert (overriding
->n
.tb
);
13431 if (overriding
->n
.tb
->deferred
)
13433 gfc_error ("Derived-type %qs declared at %L must be ABSTRACT because"
13434 " %qs is DEFERRED and not overridden",
13435 sub
->name
, &sub
->declared_at
, st
->name
);
13444 ensure_not_abstract (gfc_symbol
* sub
, gfc_symbol
* ancestor
)
13446 /* The algorithm used here is to recursively travel up the ancestry of sub
13447 and for each ancestor-type, check all bindings. If any of them is
13448 DEFERRED, look it up starting from sub and see if the found (overriding)
13449 binding is not DEFERRED.
13450 This is not the most efficient way to do this, but it should be ok and is
13451 clearer than something sophisticated. */
13453 gcc_assert (ancestor
&& !sub
->attr
.abstract
);
13455 if (!ancestor
->attr
.abstract
)
13458 /* Walk bindings of this ancestor. */
13459 if (ancestor
->f2k_derived
)
13462 t
= ensure_not_abstract_walker (sub
, ancestor
->f2k_derived
->tb_sym_root
);
13467 /* Find next ancestor type and recurse on it. */
13468 ancestor
= gfc_get_derived_super_type (ancestor
);
13470 return ensure_not_abstract (sub
, ancestor
);
13476 /* This check for typebound defined assignments is done recursively
13477 since the order in which derived types are resolved is not always in
13478 order of the declarations. */
13481 check_defined_assignments (gfc_symbol
*derived
)
13485 for (c
= derived
->components
; c
; c
= c
->next
)
13487 if (!gfc_bt_struct (c
->ts
.type
)
13489 || c
->attr
.allocatable
13490 || c
->attr
.proc_pointer_comp
13491 || c
->attr
.class_pointer
13492 || c
->attr
.proc_pointer
)
13495 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
13496 || (c
->ts
.u
.derived
->f2k_derived
13497 && c
->ts
.u
.derived
->f2k_derived
->tb_op
[INTRINSIC_ASSIGN
]))
13499 derived
->attr
.defined_assign_comp
= 1;
13503 check_defined_assignments (c
->ts
.u
.derived
);
13504 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
13506 derived
->attr
.defined_assign_comp
= 1;
13513 /* Resolve a single component of a derived type or structure. */
13516 resolve_component (gfc_component
*c
, gfc_symbol
*sym
)
13518 gfc_symbol
*super_type
;
13520 if (c
->attr
.artificial
)
13523 /* Do not allow vtype components to be resolved in nameless namespaces
13524 such as block data because the procedure pointers will cause ICEs
13525 and vtables are not needed in these contexts. */
13526 if (sym
->attr
.vtype
&& sym
->attr
.use_assoc
13527 && sym
->ns
->proc_name
== NULL
)
13531 if ((!sym
->attr
.is_class
|| c
!= sym
->components
)
13532 && c
->attr
.codimension
13533 && (!c
->attr
.allocatable
|| (c
->as
&& c
->as
->type
!= AS_DEFERRED
)))
13535 gfc_error ("Coarray component %qs at %L must be allocatable with "
13536 "deferred shape", c
->name
, &c
->loc
);
13541 if (c
->attr
.codimension
&& c
->ts
.type
== BT_DERIVED
13542 && c
->ts
.u
.derived
->ts
.is_iso_c
)
13544 gfc_error ("Component %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
13545 "shall not be a coarray", c
->name
, &c
->loc
);
13550 if (gfc_bt_struct (c
->ts
.type
) && c
->ts
.u
.derived
->attr
.coarray_comp
13551 && (c
->attr
.codimension
|| c
->attr
.pointer
|| c
->attr
.dimension
13552 || c
->attr
.allocatable
))
13554 gfc_error ("Component %qs at %L with coarray component "
13555 "shall be a nonpointer, nonallocatable scalar",
13561 if (c
->attr
.contiguous
&& (!c
->attr
.dimension
|| !c
->attr
.pointer
))
13563 gfc_error ("Component %qs at %L has the CONTIGUOUS attribute but "
13564 "is not an array pointer", c
->name
, &c
->loc
);
13568 /* F2003, 15.2.1 - length has to be one. */
13569 if (sym
->attr
.is_bind_c
&& c
->ts
.type
== BT_CHARACTER
13570 && (c
->ts
.u
.cl
== NULL
|| c
->ts
.u
.cl
->length
== NULL
13571 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
)
13572 || mpz_cmp_si (c
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
13574 gfc_error ("Component %qs of BIND(C) type at %L must have length one",
13579 if (c
->attr
.proc_pointer
&& c
->ts
.interface
)
13581 gfc_symbol
*ifc
= c
->ts
.interface
;
13583 if (!sym
->attr
.vtype
&& !check_proc_interface (ifc
, &c
->loc
))
13589 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
13591 /* Resolve interface and copy attributes. */
13592 if (ifc
->formal
&& !ifc
->formal_ns
)
13593 resolve_symbol (ifc
);
13594 if (ifc
->attr
.intrinsic
)
13595 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
13599 c
->ts
= ifc
->result
->ts
;
13600 c
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
13601 c
->attr
.pointer
= ifc
->result
->attr
.pointer
;
13602 c
->attr
.dimension
= ifc
->result
->attr
.dimension
;
13603 c
->as
= gfc_copy_array_spec (ifc
->result
->as
);
13604 c
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
13609 c
->attr
.allocatable
= ifc
->attr
.allocatable
;
13610 c
->attr
.pointer
= ifc
->attr
.pointer
;
13611 c
->attr
.dimension
= ifc
->attr
.dimension
;
13612 c
->as
= gfc_copy_array_spec (ifc
->as
);
13613 c
->attr
.class_ok
= ifc
->attr
.class_ok
;
13615 c
->ts
.interface
= ifc
;
13616 c
->attr
.function
= ifc
->attr
.function
;
13617 c
->attr
.subroutine
= ifc
->attr
.subroutine
;
13619 c
->attr
.pure
= ifc
->attr
.pure
;
13620 c
->attr
.elemental
= ifc
->attr
.elemental
;
13621 c
->attr
.recursive
= ifc
->attr
.recursive
;
13622 c
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
13623 c
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
13624 /* Copy char length. */
13625 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
13627 gfc_charlen
*cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
13628 if (cl
->length
&& !cl
->resolved
13629 && !gfc_resolve_expr (cl
->length
))
13638 else if (c
->attr
.proc_pointer
&& c
->ts
.type
== BT_UNKNOWN
)
13640 /* Since PPCs are not implicitly typed, a PPC without an explicit
13641 interface must be a subroutine. */
13642 gfc_add_subroutine (&c
->attr
, c
->name
, &c
->loc
);
13645 /* Procedure pointer components: Check PASS arg. */
13646 if (c
->attr
.proc_pointer
&& !c
->tb
->nopass
&& c
->tb
->pass_arg_num
== 0
13647 && !sym
->attr
.vtype
)
13649 gfc_symbol
* me_arg
;
13651 if (c
->tb
->pass_arg
)
13653 gfc_formal_arglist
* i
;
13655 /* If an explicit passing argument name is given, walk the arg-list
13656 and look for it. */
13659 c
->tb
->pass_arg_num
= 1;
13660 for (i
= c
->ts
.interface
->formal
; i
; i
= i
->next
)
13662 if (!strcmp (i
->sym
->name
, c
->tb
->pass_arg
))
13667 c
->tb
->pass_arg_num
++;
13672 gfc_error ("Procedure pointer component %qs with PASS(%s) "
13673 "at %L has no argument %qs", c
->name
,
13674 c
->tb
->pass_arg
, &c
->loc
, c
->tb
->pass_arg
);
13681 /* Otherwise, take the first one; there should in fact be at least
13683 c
->tb
->pass_arg_num
= 1;
13684 if (!c
->ts
.interface
->formal
)
13686 gfc_error ("Procedure pointer component %qs with PASS at %L "
13687 "must have at least one argument",
13692 me_arg
= c
->ts
.interface
->formal
->sym
;
13695 /* Now check that the argument-type matches. */
13696 gcc_assert (me_arg
);
13697 if ((me_arg
->ts
.type
!= BT_DERIVED
&& me_arg
->ts
.type
!= BT_CLASS
)
13698 || (me_arg
->ts
.type
== BT_DERIVED
&& me_arg
->ts
.u
.derived
!= sym
)
13699 || (me_arg
->ts
.type
== BT_CLASS
13700 && CLASS_DATA (me_arg
)->ts
.u
.derived
!= sym
))
13702 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13703 " the derived type %qs", me_arg
->name
, c
->name
,
13704 me_arg
->name
, &c
->loc
, sym
->name
);
13709 /* Check for F03:C453. */
13710 if (CLASS_DATA (me_arg
)->attr
.dimension
)
13712 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13713 "must be scalar", me_arg
->name
, c
->name
, me_arg
->name
,
13719 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13721 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13722 "may not have the POINTER attribute", me_arg
->name
,
13723 c
->name
, me_arg
->name
, &c
->loc
);
13728 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13730 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13731 "may not be ALLOCATABLE", me_arg
->name
, c
->name
,
13732 me_arg
->name
, &c
->loc
);
13737 if (gfc_type_is_extensible (sym
) && me_arg
->ts
.type
!= BT_CLASS
)
13739 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13740 " at %L", c
->name
, &c
->loc
);
13746 /* Check type-spec if this is not the parent-type component. */
13747 if (((sym
->attr
.is_class
13748 && (!sym
->components
->ts
.u
.derived
->attr
.extension
13749 || c
!= sym
->components
->ts
.u
.derived
->components
))
13750 || (!sym
->attr
.is_class
13751 && (!sym
->attr
.extension
|| c
!= sym
->components
)))
13752 && !sym
->attr
.vtype
13753 && !resolve_typespec_used (&c
->ts
, &c
->loc
, c
->name
))
13756 super_type
= gfc_get_derived_super_type (sym
);
13758 /* If this type is an extension, set the accessibility of the parent
13761 && ((sym
->attr
.is_class
13762 && c
== sym
->components
->ts
.u
.derived
->components
)
13763 || (!sym
->attr
.is_class
&& c
== sym
->components
))
13764 && strcmp (super_type
->name
, c
->name
) == 0)
13765 c
->attr
.access
= super_type
->attr
.access
;
13767 /* If this type is an extension, see if this component has the same name
13768 as an inherited type-bound procedure. */
13769 if (super_type
&& !sym
->attr
.is_class
13770 && gfc_find_typebound_proc (super_type
, NULL
, c
->name
, true, NULL
))
13772 gfc_error ("Component %qs of %qs at %L has the same name as an"
13773 " inherited type-bound procedure",
13774 c
->name
, sym
->name
, &c
->loc
);
13778 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.proc_pointer
13779 && !c
->ts
.deferred
)
13781 if (c
->ts
.u
.cl
->length
== NULL
13782 || (!resolve_charlen(c
->ts
.u
.cl
))
13783 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
))
13785 gfc_error ("Character length of component %qs needs to "
13786 "be a constant specification expression at %L",
13788 c
->ts
.u
.cl
->length
? &c
->ts
.u
.cl
->length
->where
: &c
->loc
);
13793 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.deferred
13794 && !c
->attr
.pointer
&& !c
->attr
.allocatable
)
13796 gfc_error ("Character component %qs of %qs at %L with deferred "
13797 "length must be a POINTER or ALLOCATABLE",
13798 c
->name
, sym
->name
, &c
->loc
);
13802 /* Add the hidden deferred length field. */
13803 if (c
->ts
.type
== BT_CHARACTER
13804 && (c
->ts
.deferred
|| c
->attr
.pdt_string
)
13805 && !c
->attr
.function
13806 && !sym
->attr
.is_class
)
13808 char name
[GFC_MAX_SYMBOL_LEN
+9];
13809 gfc_component
*strlen
;
13810 sprintf (name
, "_%s_length", c
->name
);
13811 strlen
= gfc_find_component (sym
, name
, true, true, NULL
);
13812 if (strlen
== NULL
)
13814 if (!gfc_add_component (sym
, name
, &strlen
))
13816 strlen
->ts
.type
= BT_INTEGER
;
13817 strlen
->ts
.kind
= gfc_charlen_int_kind
;
13818 strlen
->attr
.access
= ACCESS_PRIVATE
;
13819 strlen
->attr
.artificial
= 1;
13823 if (c
->ts
.type
== BT_DERIVED
13824 && sym
->component_access
!= ACCESS_PRIVATE
13825 && gfc_check_symbol_access (sym
)
13826 && !is_sym_host_assoc (c
->ts
.u
.derived
, sym
->ns
)
13827 && !c
->ts
.u
.derived
->attr
.use_assoc
13828 && !gfc_check_symbol_access (c
->ts
.u
.derived
)
13829 && !gfc_notify_std (GFC_STD_F2003
, "the component %qs is a "
13830 "PRIVATE type and cannot be a component of "
13831 "%qs, which is PUBLIC at %L", c
->name
,
13832 sym
->name
, &sym
->declared_at
))
13835 if ((sym
->attr
.sequence
|| sym
->attr
.is_bind_c
) && c
->ts
.type
== BT_CLASS
)
13837 gfc_error ("Polymorphic component %s at %L in SEQUENCE or BIND(C) "
13838 "type %s", c
->name
, &c
->loc
, sym
->name
);
13842 if (sym
->attr
.sequence
)
13844 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.sequence
== 0)
13846 gfc_error ("Component %s of SEQUENCE type declared at %L does "
13847 "not have the SEQUENCE attribute",
13848 c
->ts
.u
.derived
->name
, &sym
->declared_at
);
13853 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.generic
)
13854 c
->ts
.u
.derived
= gfc_find_dt_in_generic (c
->ts
.u
.derived
);
13855 else if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
13856 && CLASS_DATA (c
)->ts
.u
.derived
->attr
.generic
)
13857 CLASS_DATA (c
)->ts
.u
.derived
13858 = gfc_find_dt_in_generic (CLASS_DATA (c
)->ts
.u
.derived
);
13860 if (!sym
->attr
.is_class
&& c
->ts
.type
== BT_DERIVED
&& !sym
->attr
.vtype
13861 && c
->attr
.pointer
&& c
->ts
.u
.derived
->components
== NULL
13862 && !c
->ts
.u
.derived
->attr
.zero_comp
)
13864 gfc_error ("The pointer component %qs of %qs at %L is a type "
13865 "that has not been declared", c
->name
, sym
->name
,
13870 if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
13871 && CLASS_DATA (c
)->attr
.class_pointer
13872 && CLASS_DATA (c
)->ts
.u
.derived
->components
== NULL
13873 && !CLASS_DATA (c
)->ts
.u
.derived
->attr
.zero_comp
13874 && !UNLIMITED_POLY (c
))
13876 gfc_error ("The pointer component %qs of %qs at %L is a type "
13877 "that has not been declared", c
->name
, sym
->name
,
13882 /* If an allocatable component derived type is of the same type as
13883 the enclosing derived type, we need a vtable generating so that
13884 the __deallocate procedure is created. */
13885 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
13886 && c
->ts
.u
.derived
== sym
&& c
->attr
.allocatable
== 1)
13887 gfc_find_vtab (&c
->ts
);
13889 /* Ensure that all the derived type components are put on the
13890 derived type list; even in formal namespaces, where derived type
13891 pointer components might not have been declared. */
13892 if (c
->ts
.type
== BT_DERIVED
13894 && c
->ts
.u
.derived
->components
13896 && sym
!= c
->ts
.u
.derived
)
13897 add_dt_to_dt_list (c
->ts
.u
.derived
);
13899 if (!gfc_resolve_array_spec (c
->as
,
13900 !(c
->attr
.pointer
|| c
->attr
.proc_pointer
13901 || c
->attr
.allocatable
)))
13904 if (c
->initializer
&& !sym
->attr
.vtype
13905 && !c
->attr
.pdt_kind
&& !c
->attr
.pdt_len
13906 && !gfc_check_assign_symbol (sym
, c
, c
->initializer
))
13913 /* Be nice about the locus for a structure expression - show the locus of the
13914 first non-null sub-expression if we can. */
13917 cons_where (gfc_expr
*struct_expr
)
13919 gfc_constructor
*cons
;
13921 gcc_assert (struct_expr
&& struct_expr
->expr_type
== EXPR_STRUCTURE
);
13923 cons
= gfc_constructor_first (struct_expr
->value
.constructor
);
13924 for (; cons
; cons
= gfc_constructor_next (cons
))
13926 if (cons
->expr
&& cons
->expr
->expr_type
!= EXPR_NULL
)
13927 return &cons
->expr
->where
;
13930 return &struct_expr
->where
;
13933 /* Resolve the components of a structure type. Much less work than derived
13937 resolve_fl_struct (gfc_symbol
*sym
)
13940 gfc_expr
*init
= NULL
;
13943 /* Make sure UNIONs do not have overlapping initializers. */
13944 if (sym
->attr
.flavor
== FL_UNION
)
13946 for (c
= sym
->components
; c
; c
= c
->next
)
13948 if (init
&& c
->initializer
)
13950 gfc_error ("Conflicting initializers in union at %L and %L",
13951 cons_where (init
), cons_where (c
->initializer
));
13952 gfc_free_expr (c
->initializer
);
13953 c
->initializer
= NULL
;
13956 init
= c
->initializer
;
13961 for (c
= sym
->components
; c
; c
= c
->next
)
13962 if (!resolve_component (c
, sym
))
13968 if (sym
->components
)
13969 add_dt_to_dt_list (sym
);
13975 /* Resolve the components of a derived type. This does not have to wait until
13976 resolution stage, but can be done as soon as the dt declaration has been
13980 resolve_fl_derived0 (gfc_symbol
*sym
)
13982 gfc_symbol
* super_type
;
13984 gfc_formal_arglist
*f
;
13987 if (sym
->attr
.unlimited_polymorphic
)
13990 super_type
= gfc_get_derived_super_type (sym
);
13993 if (super_type
&& sym
->attr
.coarray_comp
&& !super_type
->attr
.coarray_comp
)
13995 gfc_error ("As extending type %qs at %L has a coarray component, "
13996 "parent type %qs shall also have one", sym
->name
,
13997 &sym
->declared_at
, super_type
->name
);
14001 /* Ensure the extended type gets resolved before we do. */
14002 if (super_type
&& !resolve_fl_derived0 (super_type
))
14005 /* An ABSTRACT type must be extensible. */
14006 if (sym
->attr
.abstract
&& !gfc_type_is_extensible (sym
))
14008 gfc_error ("Non-extensible derived-type %qs at %L must not be ABSTRACT",
14009 sym
->name
, &sym
->declared_at
);
14013 c
= (sym
->attr
.is_class
) ? sym
->components
->ts
.u
.derived
->components
14017 for ( ; c
!= NULL
; c
= c
->next
)
14018 if (!resolve_component (c
, sym
))
14024 /* Now add the caf token field, where needed. */
14025 if (flag_coarray
!= GFC_FCOARRAY_NONE
14026 && !sym
->attr
.is_class
&& !sym
->attr
.vtype
)
14028 for (c
= sym
->components
; c
; c
= c
->next
)
14029 if (!c
->attr
.dimension
&& !c
->attr
.codimension
14030 && (c
->attr
.allocatable
|| c
->attr
.pointer
))
14032 char name
[GFC_MAX_SYMBOL_LEN
+9];
14033 gfc_component
*token
;
14034 sprintf (name
, "_caf_%s", c
->name
);
14035 token
= gfc_find_component (sym
, name
, true, true, NULL
);
14038 if (!gfc_add_component (sym
, name
, &token
))
14040 token
->ts
.type
= BT_VOID
;
14041 token
->ts
.kind
= gfc_default_integer_kind
;
14042 token
->attr
.access
= ACCESS_PRIVATE
;
14043 token
->attr
.artificial
= 1;
14044 token
->attr
.caf_token
= 1;
14049 check_defined_assignments (sym
);
14051 if (!sym
->attr
.defined_assign_comp
&& super_type
)
14052 sym
->attr
.defined_assign_comp
14053 = super_type
->attr
.defined_assign_comp
;
14055 /* If this is a non-ABSTRACT type extending an ABSTRACT one, ensure that
14056 all DEFERRED bindings are overridden. */
14057 if (super_type
&& super_type
->attr
.abstract
&& !sym
->attr
.abstract
14058 && !sym
->attr
.is_class
14059 && !ensure_not_abstract (sym
, super_type
))
14062 /* Check that there is a component for every PDT parameter. */
14063 if (sym
->attr
.pdt_template
)
14065 for (f
= sym
->formal
; f
; f
= f
->next
)
14069 c
= gfc_find_component (sym
, f
->sym
->name
, true, true, NULL
);
14072 gfc_error ("Parameterized type %qs does not have a component "
14073 "corresponding to parameter %qs at %L", sym
->name
,
14074 f
->sym
->name
, &sym
->declared_at
);
14080 /* Add derived type to the derived type list. */
14081 add_dt_to_dt_list (sym
);
14087 /* The following procedure does the full resolution of a derived type,
14088 including resolution of all type-bound procedures (if present). In contrast
14089 to 'resolve_fl_derived0' this can only be done after the module has been
14090 parsed completely. */
14093 resolve_fl_derived (gfc_symbol
*sym
)
14095 gfc_symbol
*gen_dt
= NULL
;
14097 if (sym
->attr
.unlimited_polymorphic
)
14100 if (!sym
->attr
.is_class
)
14101 gfc_find_symbol (sym
->name
, sym
->ns
, 0, &gen_dt
);
14102 if (gen_dt
&& gen_dt
->generic
&& gen_dt
->generic
->next
14103 && (!gen_dt
->generic
->sym
->attr
.use_assoc
14104 || gen_dt
->generic
->sym
->module
!= gen_dt
->generic
->next
->sym
->module
)
14105 && !gfc_notify_std (GFC_STD_F2003
, "Generic name %qs of function "
14106 "%qs at %L being the same name as derived "
14107 "type at %L", sym
->name
,
14108 gen_dt
->generic
->sym
== sym
14109 ? gen_dt
->generic
->next
->sym
->name
14110 : gen_dt
->generic
->sym
->name
,
14111 gen_dt
->generic
->sym
== sym
14112 ? &gen_dt
->generic
->next
->sym
->declared_at
14113 : &gen_dt
->generic
->sym
->declared_at
,
14114 &sym
->declared_at
))
14117 /* Resolve the finalizer procedures. */
14118 if (!gfc_resolve_finalizers (sym
, NULL
))
14121 if (sym
->attr
.is_class
&& sym
->ts
.u
.derived
== NULL
)
14123 /* Fix up incomplete CLASS symbols. */
14124 gfc_component
*data
= gfc_find_component (sym
, "_data", true, true, NULL
);
14125 gfc_component
*vptr
= gfc_find_component (sym
, "_vptr", true, true, NULL
);
14127 /* Nothing more to do for unlimited polymorphic entities. */
14128 if (data
->ts
.u
.derived
->attr
.unlimited_polymorphic
)
14130 else if (vptr
->ts
.u
.derived
== NULL
)
14132 gfc_symbol
*vtab
= gfc_find_derived_vtab (data
->ts
.u
.derived
);
14134 vptr
->ts
.u
.derived
= vtab
->ts
.u
.derived
;
14135 if (!resolve_fl_derived0 (vptr
->ts
.u
.derived
))
14140 if (!resolve_fl_derived0 (sym
))
14143 /* Resolve the type-bound procedures. */
14144 if (!resolve_typebound_procedures (sym
))
14147 /* Generate module vtables subject to their accessibility and their not
14148 being vtables or pdt templates. If this is not done class declarations
14149 in external procedures wind up with their own version and so SELECT TYPE
14150 fails because the vptrs do not have the same address. */
14151 if (gfc_option
.allow_std
& GFC_STD_F2003
14152 && sym
->ns
->proc_name
14153 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14154 && sym
->attr
.access
!= ACCESS_PRIVATE
14155 && !(sym
->attr
.use_assoc
|| sym
->attr
.vtype
|| sym
->attr
.pdt_template
))
14157 gfc_symbol
*vtab
= gfc_find_derived_vtab (sym
);
14158 gfc_set_sym_referenced (vtab
);
14166 resolve_fl_namelist (gfc_symbol
*sym
)
14171 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14173 /* Check again, the check in match only works if NAMELIST comes
14175 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SIZE
)
14177 gfc_error ("Assumed size array %qs in namelist %qs at %L is not "
14178 "allowed", nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14182 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SHAPE
14183 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14184 "with assumed shape in namelist %qs at %L",
14185 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14188 if (is_non_constant_shape_array (nl
->sym
)
14189 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14190 "with nonconstant shape in namelist %qs at %L",
14191 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14194 if (nl
->sym
->ts
.type
== BT_CHARACTER
14195 && (nl
->sym
->ts
.u
.cl
->length
== NULL
14196 || !gfc_is_constant_expr (nl
->sym
->ts
.u
.cl
->length
))
14197 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs with "
14198 "nonconstant character length in "
14199 "namelist %qs at %L", nl
->sym
->name
,
14200 sym
->name
, &sym
->declared_at
))
14205 /* Reject PRIVATE objects in a PUBLIC namelist. */
14206 if (gfc_check_symbol_access (sym
))
14208 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14210 if (!nl
->sym
->attr
.use_assoc
14211 && !is_sym_host_assoc (nl
->sym
, sym
->ns
)
14212 && !gfc_check_symbol_access (nl
->sym
))
14214 gfc_error ("NAMELIST object %qs was declared PRIVATE and "
14215 "cannot be member of PUBLIC namelist %qs at %L",
14216 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14220 if (nl
->sym
->ts
.type
== BT_DERIVED
14221 && (nl
->sym
->ts
.u
.derived
->attr
.alloc_comp
14222 || nl
->sym
->ts
.u
.derived
->attr
.pointer_comp
))
14224 if (!gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs in "
14225 "namelist %qs at %L with ALLOCATABLE "
14226 "or POINTER components", nl
->sym
->name
,
14227 sym
->name
, &sym
->declared_at
))
14232 /* Types with private components that came here by USE-association. */
14233 if (nl
->sym
->ts
.type
== BT_DERIVED
14234 && derived_inaccessible (nl
->sym
->ts
.u
.derived
))
14236 gfc_error ("NAMELIST object %qs has use-associated PRIVATE "
14237 "components and cannot be member of namelist %qs at %L",
14238 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14242 /* Types with private components that are defined in the same module. */
14243 if (nl
->sym
->ts
.type
== BT_DERIVED
14244 && !is_sym_host_assoc (nl
->sym
->ts
.u
.derived
, sym
->ns
)
14245 && nl
->sym
->ts
.u
.derived
->attr
.private_comp
)
14247 gfc_error ("NAMELIST object %qs has PRIVATE components and "
14248 "cannot be a member of PUBLIC namelist %qs at %L",
14249 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14256 /* 14.1.2 A module or internal procedure represent local entities
14257 of the same type as a namelist member and so are not allowed. */
14258 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14260 if (nl
->sym
->ts
.kind
!= 0 && nl
->sym
->attr
.flavor
== FL_VARIABLE
)
14263 if (nl
->sym
->attr
.function
&& nl
->sym
== nl
->sym
->result
)
14264 if ((nl
->sym
== sym
->ns
->proc_name
)
14266 (sym
->ns
->parent
&& nl
->sym
== sym
->ns
->parent
->proc_name
))
14271 gfc_find_symbol (nl
->sym
->name
, sym
->ns
, 1, &nlsym
);
14272 if (nlsym
&& nlsym
->attr
.flavor
== FL_PROCEDURE
)
14274 gfc_error ("PROCEDURE attribute conflicts with NAMELIST "
14275 "attribute in %qs at %L", nlsym
->name
,
14276 &sym
->declared_at
);
14283 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14284 nl
->sym
->attr
.asynchronous
= 1;
14291 resolve_fl_parameter (gfc_symbol
*sym
)
14293 /* A parameter array's shape needs to be constant. */
14294 if (sym
->as
!= NULL
14295 && (sym
->as
->type
== AS_DEFERRED
14296 || is_non_constant_shape_array (sym
)))
14298 gfc_error ("Parameter array %qs at %L cannot be automatic "
14299 "or of deferred shape", sym
->name
, &sym
->declared_at
);
14303 /* Constraints on deferred type parameter. */
14304 if (!deferred_requirements (sym
))
14307 /* Make sure a parameter that has been implicitly typed still
14308 matches the implicit type, since PARAMETER statements can precede
14309 IMPLICIT statements. */
14310 if (sym
->attr
.implicit_type
14311 && !gfc_compare_types (&sym
->ts
, gfc_get_default_type (sym
->name
,
14314 gfc_error ("Implicitly typed PARAMETER %qs at %L doesn't match a "
14315 "later IMPLICIT type", sym
->name
, &sym
->declared_at
);
14319 /* Make sure the types of derived parameters are consistent. This
14320 type checking is deferred until resolution because the type may
14321 refer to a derived type from the host. */
14322 if (sym
->ts
.type
== BT_DERIVED
14323 && !gfc_compare_types (&sym
->ts
, &sym
->value
->ts
))
14325 gfc_error ("Incompatible derived type in PARAMETER at %L",
14326 &sym
->value
->where
);
14330 /* F03:C509,C514. */
14331 if (sym
->ts
.type
== BT_CLASS
)
14333 gfc_error ("CLASS variable %qs at %L cannot have the PARAMETER attribute",
14334 sym
->name
, &sym
->declared_at
);
14342 /* Called by resolve_symbol to check PDTs. */
14345 resolve_pdt (gfc_symbol
* sym
)
14347 gfc_symbol
*derived
= NULL
;
14348 gfc_actual_arglist
*param
;
14350 bool const_len_exprs
= true;
14351 bool assumed_len_exprs
= false;
14352 symbol_attribute
*attr
;
14354 if (sym
->ts
.type
== BT_DERIVED
)
14356 derived
= sym
->ts
.u
.derived
;
14357 attr
= &(sym
->attr
);
14359 else if (sym
->ts
.type
== BT_CLASS
)
14361 derived
= CLASS_DATA (sym
)->ts
.u
.derived
;
14362 attr
= &(CLASS_DATA (sym
)->attr
);
14365 gcc_unreachable ();
14367 gcc_assert (derived
->attr
.pdt_type
);
14369 for (param
= sym
->param_list
; param
; param
= param
->next
)
14371 c
= gfc_find_component (derived
, param
->name
, false, true, NULL
);
14373 if (c
->attr
.pdt_kind
)
14376 if (param
->expr
&& !gfc_is_constant_expr (param
->expr
)
14377 && c
->attr
.pdt_len
)
14378 const_len_exprs
= false;
14379 else if (param
->spec_type
== SPEC_ASSUMED
)
14380 assumed_len_exprs
= true;
14382 if (param
->spec_type
== SPEC_DEFERRED
14383 && !attr
->allocatable
&& !attr
->pointer
)
14384 gfc_error ("The object %qs at %L has a deferred LEN "
14385 "parameter %qs and is neither allocatable "
14386 "nor a pointer", sym
->name
, &sym
->declared_at
,
14391 if (!const_len_exprs
14392 && (sym
->ns
->proc_name
->attr
.is_main_program
14393 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14394 || sym
->attr
.save
!= SAVE_NONE
))
14395 gfc_error ("The AUTOMATIC object %qs at %L must not have the "
14396 "SAVE attribute or be a variable declared in the "
14397 "main program, a module or a submodule(F08/C513)",
14398 sym
->name
, &sym
->declared_at
);
14400 if (assumed_len_exprs
&& !(sym
->attr
.dummy
14401 || sym
->attr
.select_type_temporary
|| sym
->attr
.associate_var
))
14402 gfc_error ("The object %qs at %L with ASSUMED type parameters "
14403 "must be a dummy or a SELECT TYPE selector(F08/4.2)",
14404 sym
->name
, &sym
->declared_at
);
14408 /* Do anything necessary to resolve a symbol. Right now, we just
14409 assume that an otherwise unknown symbol is a variable. This sort
14410 of thing commonly happens for symbols in module. */
14413 resolve_symbol (gfc_symbol
*sym
)
14415 int check_constant
, mp_flag
;
14416 gfc_symtree
*symtree
;
14417 gfc_symtree
*this_symtree
;
14420 symbol_attribute class_attr
;
14421 gfc_array_spec
*as
;
14422 bool saved_specification_expr
;
14428 /* No symbol will ever have union type; only components can be unions.
14429 Union type declaration symbols have type BT_UNKNOWN but flavor FL_UNION
14430 (just like derived type declaration symbols have flavor FL_DERIVED). */
14431 gcc_assert (sym
->ts
.type
!= BT_UNION
);
14433 /* Coarrayed polymorphic objects with allocatable or pointer components are
14434 yet unsupported for -fcoarray=lib. */
14435 if (flag_coarray
== GFC_FCOARRAY_LIB
&& sym
->ts
.type
== BT_CLASS
14436 && sym
->ts
.u
.derived
&& CLASS_DATA (sym
)
14437 && CLASS_DATA (sym
)->attr
.codimension
14438 && (CLASS_DATA (sym
)->ts
.u
.derived
->attr
.alloc_comp
14439 || CLASS_DATA (sym
)->ts
.u
.derived
->attr
.pointer_comp
))
14441 gfc_error ("Sorry, allocatable/pointer components in polymorphic (CLASS) "
14442 "type coarrays at %L are unsupported", &sym
->declared_at
);
14446 if (sym
->attr
.artificial
)
14449 if (sym
->attr
.unlimited_polymorphic
)
14452 if (sym
->attr
.flavor
== FL_UNKNOWN
14453 || (sym
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.intrinsic
14454 && !sym
->attr
.generic
&& !sym
->attr
.external
14455 && sym
->attr
.if_source
== IFSRC_UNKNOWN
14456 && sym
->ts
.type
== BT_UNKNOWN
))
14459 /* If we find that a flavorless symbol is an interface in one of the
14460 parent namespaces, find its symtree in this namespace, free the
14461 symbol and set the symtree to point to the interface symbol. */
14462 for (ns
= gfc_current_ns
->parent
; ns
; ns
= ns
->parent
)
14464 symtree
= gfc_find_symtree (ns
->sym_root
, sym
->name
);
14465 if (symtree
&& (symtree
->n
.sym
->generic
||
14466 (symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
14467 && sym
->ns
->construct_entities
)))
14469 this_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
14471 if (this_symtree
->n
.sym
== sym
)
14473 symtree
->n
.sym
->refs
++;
14474 gfc_release_symbol (sym
);
14475 this_symtree
->n
.sym
= symtree
->n
.sym
;
14481 /* Otherwise give it a flavor according to such attributes as
14483 if (sym
->attr
.flavor
== FL_UNKNOWN
&& sym
->attr
.external
== 0
14484 && sym
->attr
.intrinsic
== 0)
14485 sym
->attr
.flavor
= FL_VARIABLE
;
14486 else if (sym
->attr
.flavor
== FL_UNKNOWN
)
14488 sym
->attr
.flavor
= FL_PROCEDURE
;
14489 if (sym
->attr
.dimension
)
14490 sym
->attr
.function
= 1;
14494 if (sym
->attr
.external
&& sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.function
)
14495 gfc_add_function (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14497 if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
14498 && !resolve_procedure_interface (sym
))
14501 if (sym
->attr
.is_protected
&& !sym
->attr
.proc_pointer
14502 && (sym
->attr
.procedure
|| sym
->attr
.external
))
14504 if (sym
->attr
.external
)
14505 gfc_error ("PROTECTED attribute conflicts with EXTERNAL attribute "
14506 "at %L", &sym
->declared_at
);
14508 gfc_error ("PROCEDURE attribute conflicts with PROTECTED attribute "
14509 "at %L", &sym
->declared_at
);
14514 if (sym
->attr
.flavor
== FL_DERIVED
&& !resolve_fl_derived (sym
))
14517 else if ((sym
->attr
.flavor
== FL_STRUCT
|| sym
->attr
.flavor
== FL_UNION
)
14518 && !resolve_fl_struct (sym
))
14521 /* Symbols that are module procedures with results (functions) have
14522 the types and array specification copied for type checking in
14523 procedures that call them, as well as for saving to a module
14524 file. These symbols can't stand the scrutiny that their results
14526 mp_flag
= (sym
->result
!= NULL
&& sym
->result
!= sym
);
14528 /* Make sure that the intrinsic is consistent with its internal
14529 representation. This needs to be done before assigning a default
14530 type to avoid spurious warnings. */
14531 if (sym
->attr
.flavor
!= FL_MODULE
&& sym
->attr
.intrinsic
14532 && !gfc_resolve_intrinsic (sym
, &sym
->declared_at
))
14535 /* Resolve associate names. */
14537 resolve_assoc_var (sym
, true);
14539 /* Assign default type to symbols that need one and don't have one. */
14540 if (sym
->ts
.type
== BT_UNKNOWN
)
14542 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
)
14544 gfc_set_default_type (sym
, 1, NULL
);
14547 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.external
14548 && !sym
->attr
.function
&& !sym
->attr
.subroutine
14549 && gfc_get_default_type (sym
->name
, sym
->ns
)->type
== BT_UNKNOWN
)
14550 gfc_add_subroutine (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14552 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14554 /* The specific case of an external procedure should emit an error
14555 in the case that there is no implicit type. */
14558 if (!sym
->attr
.mixed_entry_master
)
14559 gfc_set_default_type (sym
, sym
->attr
.external
, NULL
);
14563 /* Result may be in another namespace. */
14564 resolve_symbol (sym
->result
);
14566 if (!sym
->result
->attr
.proc_pointer
)
14568 sym
->ts
= sym
->result
->ts
;
14569 sym
->as
= gfc_copy_array_spec (sym
->result
->as
);
14570 sym
->attr
.dimension
= sym
->result
->attr
.dimension
;
14571 sym
->attr
.pointer
= sym
->result
->attr
.pointer
;
14572 sym
->attr
.allocatable
= sym
->result
->attr
.allocatable
;
14573 sym
->attr
.contiguous
= sym
->result
->attr
.contiguous
;
14578 else if (mp_flag
&& sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14580 bool saved_specification_expr
= specification_expr
;
14581 specification_expr
= true;
14582 gfc_resolve_array_spec (sym
->result
->as
, false);
14583 specification_expr
= saved_specification_expr
;
14586 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
14588 as
= CLASS_DATA (sym
)->as
;
14589 class_attr
= CLASS_DATA (sym
)->attr
;
14590 class_attr
.pointer
= class_attr
.class_pointer
;
14594 class_attr
= sym
->attr
;
14599 if (sym
->attr
.contiguous
14600 && (!class_attr
.dimension
14601 || (as
->type
!= AS_ASSUMED_SHAPE
&& as
->type
!= AS_ASSUMED_RANK
14602 && !class_attr
.pointer
)))
14604 gfc_error ("%qs at %L has the CONTIGUOUS attribute but is not an "
14605 "array pointer or an assumed-shape or assumed-rank array",
14606 sym
->name
, &sym
->declared_at
);
14610 /* Assumed size arrays and assumed shape arrays must be dummy
14611 arguments. Array-spec's of implied-shape should have been resolved to
14612 AS_EXPLICIT already. */
14616 /* If AS_IMPLIED_SHAPE makes it to here, it must be a bad
14617 specification expression. */
14618 if (as
->type
== AS_IMPLIED_SHAPE
)
14621 for (i
=0; i
<as
->rank
; i
++)
14623 if (as
->lower
[i
] != NULL
&& as
->upper
[i
] == NULL
)
14625 gfc_error ("Bad specification for assumed size array at %L",
14626 &as
->lower
[i
]->where
);
14633 if (((as
->type
== AS_ASSUMED_SIZE
&& !as
->cp_was_assumed
)
14634 || as
->type
== AS_ASSUMED_SHAPE
)
14635 && !sym
->attr
.dummy
&& !sym
->attr
.select_type_temporary
)
14637 if (as
->type
== AS_ASSUMED_SIZE
)
14638 gfc_error ("Assumed size array at %L must be a dummy argument",
14639 &sym
->declared_at
);
14641 gfc_error ("Assumed shape array at %L must be a dummy argument",
14642 &sym
->declared_at
);
14645 /* TS 29113, C535a. */
14646 if (as
->type
== AS_ASSUMED_RANK
&& !sym
->attr
.dummy
14647 && !sym
->attr
.select_type_temporary
)
14649 gfc_error ("Assumed-rank array at %L must be a dummy argument",
14650 &sym
->declared_at
);
14653 if (as
->type
== AS_ASSUMED_RANK
14654 && (sym
->attr
.codimension
|| sym
->attr
.value
))
14656 gfc_error ("Assumed-rank array at %L may not have the VALUE or "
14657 "CODIMENSION attribute", &sym
->declared_at
);
14662 /* Make sure symbols with known intent or optional are really dummy
14663 variable. Because of ENTRY statement, this has to be deferred
14664 until resolution time. */
14666 if (!sym
->attr
.dummy
14667 && (sym
->attr
.optional
|| sym
->attr
.intent
!= INTENT_UNKNOWN
))
14669 gfc_error ("Symbol at %L is not a DUMMY variable", &sym
->declared_at
);
14673 if (sym
->attr
.value
&& !sym
->attr
.dummy
)
14675 gfc_error ("%qs at %L cannot have the VALUE attribute because "
14676 "it is not a dummy argument", sym
->name
, &sym
->declared_at
);
14680 if (sym
->attr
.value
&& sym
->ts
.type
== BT_CHARACTER
)
14682 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
14683 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
14685 gfc_error ("Character dummy variable %qs at %L with VALUE "
14686 "attribute must have constant length",
14687 sym
->name
, &sym
->declared_at
);
14691 if (sym
->ts
.is_c_interop
14692 && mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
14694 gfc_error ("C interoperable character dummy variable %qs at %L "
14695 "with VALUE attribute must have length one",
14696 sym
->name
, &sym
->declared_at
);
14701 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
14702 && sym
->ts
.u
.derived
->attr
.generic
)
14704 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
14705 if (!sym
->ts
.u
.derived
)
14707 gfc_error ("The derived type %qs at %L is of type %qs, "
14708 "which has not been defined", sym
->name
,
14709 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
14710 sym
->ts
.type
= BT_UNKNOWN
;
14715 /* Use the same constraints as TYPE(*), except for the type check
14716 and that only scalars and assumed-size arrays are permitted. */
14717 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
14719 if (!sym
->attr
.dummy
)
14721 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14722 "a dummy argument", sym
->name
, &sym
->declared_at
);
14726 if (sym
->ts
.type
!= BT_ASSUMED
&& sym
->ts
.type
!= BT_INTEGER
14727 && sym
->ts
.type
!= BT_REAL
&& sym
->ts
.type
!= BT_LOGICAL
14728 && sym
->ts
.type
!= BT_COMPLEX
)
14730 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14731 "of type TYPE(*) or of an numeric intrinsic type",
14732 sym
->name
, &sym
->declared_at
);
14736 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
14737 || sym
->attr
.pointer
|| sym
->attr
.value
)
14739 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
14740 "have the ALLOCATABLE, CODIMENSION, POINTER or VALUE "
14741 "attribute", sym
->name
, &sym
->declared_at
);
14745 if (sym
->attr
.intent
== INTENT_OUT
)
14747 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
14748 "have the INTENT(OUT) attribute",
14749 sym
->name
, &sym
->declared_at
);
14752 if (sym
->attr
.dimension
&& sym
->as
->type
!= AS_ASSUMED_SIZE
)
14754 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall "
14755 "either be a scalar or an assumed-size array",
14756 sym
->name
, &sym
->declared_at
);
14760 /* Set the type to TYPE(*) and add a dimension(*) to ensure
14761 NO_ARG_CHECK is correctly handled in trans*.c, e.g. with
14763 sym
->ts
.type
= BT_ASSUMED
;
14764 sym
->as
= gfc_get_array_spec ();
14765 sym
->as
->type
= AS_ASSUMED_SIZE
;
14767 sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
14769 else if (sym
->ts
.type
== BT_ASSUMED
)
14771 /* TS 29113, C407a. */
14772 if (!sym
->attr
.dummy
)
14774 gfc_error ("Assumed type of variable %s at %L is only permitted "
14775 "for dummy variables", sym
->name
, &sym
->declared_at
);
14778 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
14779 || sym
->attr
.pointer
|| sym
->attr
.value
)
14781 gfc_error ("Assumed-type variable %s at %L may not have the "
14782 "ALLOCATABLE, CODIMENSION, POINTER or VALUE attribute",
14783 sym
->name
, &sym
->declared_at
);
14786 if (sym
->attr
.intent
== INTENT_OUT
)
14788 gfc_error ("Assumed-type variable %s at %L may not have the "
14789 "INTENT(OUT) attribute",
14790 sym
->name
, &sym
->declared_at
);
14793 if (sym
->attr
.dimension
&& sym
->as
->type
== AS_EXPLICIT
)
14795 gfc_error ("Assumed-type variable %s at %L shall not be an "
14796 "explicit-shape array", sym
->name
, &sym
->declared_at
);
14801 /* If the symbol is marked as bind(c), that it is declared at module level
14802 scope and verify its type and kind. Do not do the latter for symbols
14803 that are implicitly typed because that is handled in
14804 gfc_set_default_type. Handle dummy arguments and procedure definitions
14805 separately. Also, anything that is use associated is not handled here
14806 but instead is handled in the module it is declared in. Finally, derived
14807 type definitions are allowed to be BIND(C) since that only implies that
14808 they're interoperable, and they are checked fully for interoperability
14809 when a variable is declared of that type. */
14810 if (sym
->attr
.is_bind_c
&& sym
->attr
.use_assoc
== 0
14811 && sym
->attr
.dummy
== 0 && sym
->attr
.flavor
!= FL_PROCEDURE
14812 && sym
->attr
.flavor
!= FL_DERIVED
)
14816 /* First, make sure the variable is declared at the
14817 module-level scope (J3/04-007, Section 15.3). */
14818 if (sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
&&
14819 sym
->attr
.in_common
== 0)
14821 gfc_error ("Variable %qs at %L cannot be BIND(C) because it "
14822 "is neither a COMMON block nor declared at the "
14823 "module level scope", sym
->name
, &(sym
->declared_at
));
14826 else if (sym
->ts
.type
== BT_CHARACTER
14827 && (sym
->ts
.u
.cl
== NULL
|| sym
->ts
.u
.cl
->length
== NULL
14828 || !gfc_is_constant_expr (sym
->ts
.u
.cl
->length
)
14829 || mpz_cmp_si (sym
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
14831 gfc_error ("BIND(C) Variable %qs at %L must have length one",
14832 sym
->name
, &sym
->declared_at
);
14835 else if (sym
->common_head
!= NULL
&& sym
->attr
.implicit_type
== 0)
14837 t
= verify_com_block_vars_c_interop (sym
->common_head
);
14839 else if (sym
->attr
.implicit_type
== 0)
14841 /* If type() declaration, we need to verify that the components
14842 of the given type are all C interoperable, etc. */
14843 if (sym
->ts
.type
== BT_DERIVED
&&
14844 sym
->ts
.u
.derived
->attr
.is_c_interop
!= 1)
14846 /* Make sure the user marked the derived type as BIND(C). If
14847 not, call the verify routine. This could print an error
14848 for the derived type more than once if multiple variables
14849 of that type are declared. */
14850 if (sym
->ts
.u
.derived
->attr
.is_bind_c
!= 1)
14851 verify_bind_c_derived_type (sym
->ts
.u
.derived
);
14855 /* Verify the variable itself as C interoperable if it
14856 is BIND(C). It is not possible for this to succeed if
14857 the verify_bind_c_derived_type failed, so don't have to handle
14858 any error returned by verify_bind_c_derived_type. */
14859 t
= verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
14860 sym
->common_block
);
14865 /* clear the is_bind_c flag to prevent reporting errors more than
14866 once if something failed. */
14867 sym
->attr
.is_bind_c
= 0;
14872 /* If a derived type symbol has reached this point, without its
14873 type being declared, we have an error. Notice that most
14874 conditions that produce undefined derived types have already
14875 been dealt with. However, the likes of:
14876 implicit type(t) (t) ..... call foo (t) will get us here if
14877 the type is not declared in the scope of the implicit
14878 statement. Change the type to BT_UNKNOWN, both because it is so
14879 and to prevent an ICE. */
14880 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
14881 && sym
->ts
.u
.derived
->components
== NULL
14882 && !sym
->ts
.u
.derived
->attr
.zero_comp
)
14884 gfc_error ("The derived type %qs at %L is of type %qs, "
14885 "which has not been defined", sym
->name
,
14886 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
14887 sym
->ts
.type
= BT_UNKNOWN
;
14891 /* Make sure that the derived type has been resolved and that the
14892 derived type is visible in the symbol's namespace, if it is a
14893 module function and is not PRIVATE. */
14894 if (sym
->ts
.type
== BT_DERIVED
14895 && sym
->ts
.u
.derived
->attr
.use_assoc
14896 && sym
->ns
->proc_name
14897 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14898 && !resolve_fl_derived (sym
->ts
.u
.derived
))
14901 /* Unless the derived-type declaration is use associated, Fortran 95
14902 does not allow public entries of private derived types.
14903 See 4.4.1 (F95) and 4.5.1.1 (F2003); and related interpretation
14904 161 in 95-006r3. */
14905 if (sym
->ts
.type
== BT_DERIVED
14906 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14907 && !sym
->ts
.u
.derived
->attr
.use_assoc
14908 && gfc_check_symbol_access (sym
)
14909 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
14910 && !gfc_notify_std (GFC_STD_F2003
, "PUBLIC %s %qs at %L of PRIVATE "
14911 "derived type %qs",
14912 (sym
->attr
.flavor
== FL_PARAMETER
)
14913 ? "parameter" : "variable",
14914 sym
->name
, &sym
->declared_at
,
14915 sym
->ts
.u
.derived
->name
))
14918 /* F2008, C1302. */
14919 if (sym
->ts
.type
== BT_DERIVED
14920 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
14921 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
14922 || sym
->ts
.u
.derived
->attr
.lock_comp
)
14923 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
14925 gfc_error ("Variable %s at %L of type LOCK_TYPE or with subcomponent of "
14926 "type LOCK_TYPE must be a coarray", sym
->name
,
14927 &sym
->declared_at
);
14931 /* TS18508, C702/C703. */
14932 if (sym
->ts
.type
== BT_DERIVED
14933 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
14934 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
14935 || sym
->ts
.u
.derived
->attr
.event_comp
)
14936 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
14938 gfc_error ("Variable %s at %L of type EVENT_TYPE or with subcomponent of "
14939 "type EVENT_TYPE must be a coarray", sym
->name
,
14940 &sym
->declared_at
);
14944 /* An assumed-size array with INTENT(OUT) shall not be of a type for which
14945 default initialization is defined (5.1.2.4.4). */
14946 if (sym
->ts
.type
== BT_DERIVED
14948 && sym
->attr
.intent
== INTENT_OUT
14950 && sym
->as
->type
== AS_ASSUMED_SIZE
)
14952 for (c
= sym
->ts
.u
.derived
->components
; c
; c
= c
->next
)
14954 if (c
->initializer
)
14956 gfc_error ("The INTENT(OUT) dummy argument %qs at %L is "
14957 "ASSUMED SIZE and so cannot have a default initializer",
14958 sym
->name
, &sym
->declared_at
);
14965 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
14966 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.lock_comp
)
14968 gfc_error ("Dummy argument %qs at %L of LOCK_TYPE shall not be "
14969 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
14974 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
14975 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.event_comp
)
14977 gfc_error ("Dummy argument %qs at %L of EVENT_TYPE shall not be "
14978 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
14983 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
14984 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
14985 && CLASS_DATA (sym
)->attr
.coarray_comp
))
14986 || class_attr
.codimension
)
14987 && (sym
->attr
.result
|| sym
->result
== sym
))
14989 gfc_error ("Function result %qs at %L shall not be a coarray or have "
14990 "a coarray component", sym
->name
, &sym
->declared_at
);
14995 if (sym
->attr
.codimension
&& sym
->ts
.type
== BT_DERIVED
14996 && sym
->ts
.u
.derived
->ts
.is_iso_c
)
14998 gfc_error ("Variable %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
14999 "shall not be a coarray", sym
->name
, &sym
->declared_at
);
15004 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15005 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15006 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15007 && (class_attr
.codimension
|| class_attr
.pointer
|| class_attr
.dimension
15008 || class_attr
.allocatable
))
15010 gfc_error ("Variable %qs at %L with coarray component shall be a "
15011 "nonpointer, nonallocatable scalar, which is not a coarray",
15012 sym
->name
, &sym
->declared_at
);
15016 /* F2008, C526. The function-result case was handled above. */
15017 if (class_attr
.codimension
15018 && !(class_attr
.allocatable
|| sym
->attr
.dummy
|| sym
->attr
.save
15019 || sym
->attr
.select_type_temporary
15020 || sym
->attr
.associate_var
15021 || (sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15022 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15023 || sym
->ns
->proc_name
->attr
.is_main_program
15024 || sym
->attr
.function
|| sym
->attr
.result
|| sym
->attr
.use_assoc
))
15026 gfc_error ("Variable %qs at %L is a coarray and is not ALLOCATABLE, SAVE "
15027 "nor a dummy argument", sym
->name
, &sym
->declared_at
);
15031 else if (class_attr
.codimension
&& !sym
->attr
.select_type_temporary
15032 && !class_attr
.allocatable
&& as
&& as
->cotype
== AS_DEFERRED
)
15034 gfc_error ("Coarray variable %qs at %L shall not have codimensions with "
15035 "deferred shape", sym
->name
, &sym
->declared_at
);
15038 else if (class_attr
.codimension
&& class_attr
.allocatable
&& as
15039 && (as
->cotype
!= AS_DEFERRED
|| as
->type
!= AS_DEFERRED
))
15041 gfc_error ("Allocatable coarray variable %qs at %L must have "
15042 "deferred shape", sym
->name
, &sym
->declared_at
);
15047 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15048 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15049 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15050 || (class_attr
.codimension
&& class_attr
.allocatable
))
15051 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
)
15053 gfc_error ("Variable %qs at %L is INTENT(OUT) and can thus not be an "
15054 "allocatable coarray or have coarray components",
15055 sym
->name
, &sym
->declared_at
);
15059 if (class_attr
.codimension
&& sym
->attr
.dummy
15060 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.is_bind_c
)
15062 gfc_error ("Coarray dummy variable %qs at %L not allowed in BIND(C) "
15063 "procedure %qs", sym
->name
, &sym
->declared_at
,
15064 sym
->ns
->proc_name
->name
);
15068 if (sym
->ts
.type
== BT_LOGICAL
15069 && ((sym
->attr
.function
&& sym
->attr
.is_bind_c
&& sym
->result
== sym
)
15070 || ((sym
->attr
.dummy
|| sym
->attr
.result
) && sym
->ns
->proc_name
15071 && sym
->ns
->proc_name
->attr
.is_bind_c
)))
15074 for (i
= 0; gfc_logical_kinds
[i
].kind
; i
++)
15075 if (gfc_logical_kinds
[i
].kind
== sym
->ts
.kind
)
15077 if (!gfc_logical_kinds
[i
].c_bool
&& sym
->attr
.dummy
15078 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL dummy argument %qs at "
15079 "%L with non-C_Bool kind in BIND(C) procedure "
15080 "%qs", sym
->name
, &sym
->declared_at
,
15081 sym
->ns
->proc_name
->name
))
15083 else if (!gfc_logical_kinds
[i
].c_bool
15084 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL result variable "
15085 "%qs at %L with non-C_Bool kind in "
15086 "BIND(C) procedure %qs", sym
->name
,
15088 sym
->attr
.function
? sym
->name
15089 : sym
->ns
->proc_name
->name
))
15093 switch (sym
->attr
.flavor
)
15096 if (!resolve_fl_variable (sym
, mp_flag
))
15101 if (sym
->formal
&& !sym
->formal_ns
)
15103 /* Check that none of the arguments are a namelist. */
15104 gfc_formal_arglist
*formal
= sym
->formal
;
15106 for (; formal
; formal
= formal
->next
)
15107 if (formal
->sym
&& formal
->sym
->attr
.flavor
== FL_NAMELIST
)
15109 gfc_error ("Namelist %qs can not be an argument to "
15110 "subroutine or function at %L",
15111 formal
->sym
->name
, &sym
->declared_at
);
15116 if (!resolve_fl_procedure (sym
, mp_flag
))
15121 if (!resolve_fl_namelist (sym
))
15126 if (!resolve_fl_parameter (sym
))
15134 /* Resolve array specifier. Check as well some constraints
15135 on COMMON blocks. */
15137 check_constant
= sym
->attr
.in_common
&& !sym
->attr
.pointer
;
15139 /* Set the formal_arg_flag so that check_conflict will not throw
15140 an error for host associated variables in the specification
15141 expression for an array_valued function. */
15142 if (sym
->attr
.function
&& sym
->as
)
15143 formal_arg_flag
= true;
15145 saved_specification_expr
= specification_expr
;
15146 specification_expr
= true;
15147 gfc_resolve_array_spec (sym
->as
, check_constant
);
15148 specification_expr
= saved_specification_expr
;
15150 formal_arg_flag
= false;
15152 /* Resolve formal namespaces. */
15153 if (sym
->formal_ns
&& sym
->formal_ns
!= gfc_current_ns
15154 && !sym
->attr
.contained
&& !sym
->attr
.intrinsic
)
15155 gfc_resolve (sym
->formal_ns
);
15157 /* Make sure the formal namespace is present. */
15158 if (sym
->formal
&& !sym
->formal_ns
)
15160 gfc_formal_arglist
*formal
= sym
->formal
;
15161 while (formal
&& !formal
->sym
)
15162 formal
= formal
->next
;
15166 sym
->formal_ns
= formal
->sym
->ns
;
15167 if (sym
->ns
!= formal
->sym
->ns
)
15168 sym
->formal_ns
->refs
++;
15172 /* Check threadprivate restrictions. */
15173 if (sym
->attr
.threadprivate
&& !sym
->attr
.save
15174 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15175 && (!sym
->attr
.in_common
15176 && sym
->module
== NULL
15177 && (sym
->ns
->proc_name
== NULL
15178 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15179 gfc_error ("Threadprivate at %L isn't SAVEd", &sym
->declared_at
);
15181 /* Check omp declare target restrictions. */
15182 if (sym
->attr
.omp_declare_target
15183 && sym
->attr
.flavor
== FL_VARIABLE
15185 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15186 && (!sym
->attr
.in_common
15187 && sym
->module
== NULL
15188 && (sym
->ns
->proc_name
== NULL
15189 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15190 gfc_error ("!$OMP DECLARE TARGET variable %qs at %L isn't SAVEd",
15191 sym
->name
, &sym
->declared_at
);
15193 /* If we have come this far we can apply default-initializers, as
15194 described in 14.7.5, to those variables that have not already
15195 been assigned one. */
15196 if (sym
->ts
.type
== BT_DERIVED
15198 && !sym
->attr
.allocatable
15199 && !sym
->attr
.alloc_comp
)
15201 symbol_attribute
*a
= &sym
->attr
;
15203 if ((!a
->save
&& !a
->dummy
&& !a
->pointer
15204 && !a
->in_common
&& !a
->use_assoc
15206 && !((a
->function
|| a
->result
)
15208 || sym
->ts
.u
.derived
->attr
.alloc_comp
15209 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15210 && !(a
->function
&& sym
!= sym
->result
))
15211 || (a
->dummy
&& a
->intent
== INTENT_OUT
&& !a
->pointer
))
15212 apply_default_init (sym
);
15213 else if (a
->function
&& sym
->result
&& a
->access
!= ACCESS_PRIVATE
15214 && (sym
->ts
.u
.derived
->attr
.alloc_comp
15215 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15216 /* Mark the result symbol to be referenced, when it has allocatable
15218 sym
->result
->attr
.referenced
= 1;
15221 if (sym
->ts
.type
== BT_CLASS
&& sym
->ns
== gfc_current_ns
15222 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
15223 && !CLASS_DATA (sym
)->attr
.class_pointer
15224 && !CLASS_DATA (sym
)->attr
.allocatable
)
15225 apply_default_init (sym
);
15227 /* If this symbol has a type-spec, check it. */
15228 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
15229 || (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
))
15230 if (!resolve_typespec_used (&sym
->ts
, &sym
->declared_at
, sym
->name
))
15233 if (sym
->param_list
)
15238 /************* Resolve DATA statements *************/
15242 gfc_data_value
*vnode
;
15248 /* Advance the values structure to point to the next value in the data list. */
15251 next_data_value (void)
15253 while (mpz_cmp_ui (values
.left
, 0) == 0)
15256 if (values
.vnode
->next
== NULL
)
15259 values
.vnode
= values
.vnode
->next
;
15260 mpz_set (values
.left
, values
.vnode
->repeat
);
15268 check_data_variable (gfc_data_variable
*var
, locus
*where
)
15274 ar_type mark
= AR_UNKNOWN
;
15276 mpz_t section_index
[GFC_MAX_DIMENSIONS
];
15282 if (!gfc_resolve_expr (var
->expr
))
15286 mpz_init_set_si (offset
, 0);
15289 if (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
15290 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
15291 e
= e
->value
.function
.actual
->expr
;
15293 if (e
->expr_type
!= EXPR_VARIABLE
)
15294 gfc_internal_error ("check_data_variable(): Bad expression");
15296 sym
= e
->symtree
->n
.sym
;
15298 if (sym
->ns
->is_block_data
&& !sym
->attr
.in_common
)
15300 gfc_error ("BLOCK DATA element %qs at %L must be in COMMON",
15301 sym
->name
, &sym
->declared_at
);
15304 if (e
->ref
== NULL
&& sym
->as
)
15306 gfc_error ("DATA array %qs at %L must be specified in a previous"
15307 " declaration", sym
->name
, where
);
15311 has_pointer
= sym
->attr
.pointer
;
15313 if (gfc_is_coindexed (e
))
15315 gfc_error ("DATA element %qs at %L cannot have a coindex", sym
->name
,
15320 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15322 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.pointer
)
15326 && ref
->type
== REF_ARRAY
15327 && ref
->u
.ar
.type
!= AR_FULL
)
15329 gfc_error ("DATA element %qs at %L is a pointer and so must "
15330 "be a full array", sym
->name
, where
);
15335 if (e
->rank
== 0 || has_pointer
)
15337 mpz_init_set_ui (size
, 1);
15344 /* Find the array section reference. */
15345 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15347 if (ref
->type
!= REF_ARRAY
)
15349 if (ref
->u
.ar
.type
== AR_ELEMENT
)
15355 /* Set marks according to the reference pattern. */
15356 switch (ref
->u
.ar
.type
)
15364 /* Get the start position of array section. */
15365 gfc_get_section_index (ar
, section_index
, &offset
);
15370 gcc_unreachable ();
15373 if (!gfc_array_size (e
, &size
))
15375 gfc_error ("Nonconstant array section at %L in DATA statement",
15377 mpz_clear (offset
);
15384 while (mpz_cmp_ui (size
, 0) > 0)
15386 if (!next_data_value ())
15388 gfc_error ("DATA statement at %L has more variables than values",
15394 t
= gfc_check_assign (var
->expr
, values
.vnode
->expr
, 0);
15398 /* If we have more than one element left in the repeat count,
15399 and we have more than one element left in the target variable,
15400 then create a range assignment. */
15401 /* FIXME: Only done for full arrays for now, since array sections
15403 if (mark
== AR_FULL
&& ref
&& ref
->next
== NULL
15404 && mpz_cmp_ui (values
.left
, 1) > 0 && mpz_cmp_ui (size
, 1) > 0)
15408 if (mpz_cmp (size
, values
.left
) >= 0)
15410 mpz_init_set (range
, values
.left
);
15411 mpz_sub (size
, size
, values
.left
);
15412 mpz_set_ui (values
.left
, 0);
15416 mpz_init_set (range
, size
);
15417 mpz_sub (values
.left
, values
.left
, size
);
15418 mpz_set_ui (size
, 0);
15421 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15424 mpz_add (offset
, offset
, range
);
15431 /* Assign initial value to symbol. */
15434 mpz_sub_ui (values
.left
, values
.left
, 1);
15435 mpz_sub_ui (size
, size
, 1);
15437 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15442 if (mark
== AR_FULL
)
15443 mpz_add_ui (offset
, offset
, 1);
15445 /* Modify the array section indexes and recalculate the offset
15446 for next element. */
15447 else if (mark
== AR_SECTION
)
15448 gfc_advance_section (section_index
, ar
, &offset
);
15452 if (mark
== AR_SECTION
)
15454 for (i
= 0; i
< ar
->dimen
; i
++)
15455 mpz_clear (section_index
[i
]);
15459 mpz_clear (offset
);
15465 static bool traverse_data_var (gfc_data_variable
*, locus
*);
15467 /* Iterate over a list of elements in a DATA statement. */
15470 traverse_data_list (gfc_data_variable
*var
, locus
*where
)
15473 iterator_stack frame
;
15474 gfc_expr
*e
, *start
, *end
, *step
;
15475 bool retval
= true;
15477 mpz_init (frame
.value
);
15480 start
= gfc_copy_expr (var
->iter
.start
);
15481 end
= gfc_copy_expr (var
->iter
.end
);
15482 step
= gfc_copy_expr (var
->iter
.step
);
15484 if (!gfc_simplify_expr (start
, 1)
15485 || start
->expr_type
!= EXPR_CONSTANT
)
15487 gfc_error ("start of implied-do loop at %L could not be "
15488 "simplified to a constant value", &start
->where
);
15492 if (!gfc_simplify_expr (end
, 1)
15493 || end
->expr_type
!= EXPR_CONSTANT
)
15495 gfc_error ("end of implied-do loop at %L could not be "
15496 "simplified to a constant value", &start
->where
);
15500 if (!gfc_simplify_expr (step
, 1)
15501 || step
->expr_type
!= EXPR_CONSTANT
)
15503 gfc_error ("step of implied-do loop at %L could not be "
15504 "simplified to a constant value", &start
->where
);
15509 mpz_set (trip
, end
->value
.integer
);
15510 mpz_sub (trip
, trip
, start
->value
.integer
);
15511 mpz_add (trip
, trip
, step
->value
.integer
);
15513 mpz_div (trip
, trip
, step
->value
.integer
);
15515 mpz_set (frame
.value
, start
->value
.integer
);
15517 frame
.prev
= iter_stack
;
15518 frame
.variable
= var
->iter
.var
->symtree
;
15519 iter_stack
= &frame
;
15521 while (mpz_cmp_ui (trip
, 0) > 0)
15523 if (!traverse_data_var (var
->list
, where
))
15529 e
= gfc_copy_expr (var
->expr
);
15530 if (!gfc_simplify_expr (e
, 1))
15537 mpz_add (frame
.value
, frame
.value
, step
->value
.integer
);
15539 mpz_sub_ui (trip
, trip
, 1);
15543 mpz_clear (frame
.value
);
15546 gfc_free_expr (start
);
15547 gfc_free_expr (end
);
15548 gfc_free_expr (step
);
15550 iter_stack
= frame
.prev
;
15555 /* Type resolve variables in the variable list of a DATA statement. */
15558 traverse_data_var (gfc_data_variable
*var
, locus
*where
)
15562 for (; var
; var
= var
->next
)
15564 if (var
->expr
== NULL
)
15565 t
= traverse_data_list (var
, where
);
15567 t
= check_data_variable (var
, where
);
15577 /* Resolve the expressions and iterators associated with a data statement.
15578 This is separate from the assignment checking because data lists should
15579 only be resolved once. */
15582 resolve_data_variables (gfc_data_variable
*d
)
15584 for (; d
; d
= d
->next
)
15586 if (d
->list
== NULL
)
15588 if (!gfc_resolve_expr (d
->expr
))
15593 if (!gfc_resolve_iterator (&d
->iter
, false, true))
15596 if (!resolve_data_variables (d
->list
))
15605 /* Resolve a single DATA statement. We implement this by storing a pointer to
15606 the value list into static variables, and then recursively traversing the
15607 variables list, expanding iterators and such. */
15610 resolve_data (gfc_data
*d
)
15613 if (!resolve_data_variables (d
->var
))
15616 values
.vnode
= d
->value
;
15617 if (d
->value
== NULL
)
15618 mpz_set_ui (values
.left
, 0);
15620 mpz_set (values
.left
, d
->value
->repeat
);
15622 if (!traverse_data_var (d
->var
, &d
->where
))
15625 /* At this point, we better not have any values left. */
15627 if (next_data_value ())
15628 gfc_error ("DATA statement at %L has more values than variables",
15633 /* 12.6 Constraint: In a pure subprogram any variable which is in common or
15634 accessed by host or use association, is a dummy argument to a pure function,
15635 is a dummy argument with INTENT (IN) to a pure subroutine, or an object that
15636 is storage associated with any such variable, shall not be used in the
15637 following contexts: (clients of this function). */
15639 /* Determines if a variable is not 'pure', i.e., not assignable within a pure
15640 procedure. Returns zero if assignment is OK, nonzero if there is a
15643 gfc_impure_variable (gfc_symbol
*sym
)
15648 if (sym
->attr
.use_assoc
|| sym
->attr
.in_common
)
15651 /* Check if the symbol's ns is inside the pure procedure. */
15652 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15656 if (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.function
)
15660 proc
= sym
->ns
->proc_name
;
15661 if (sym
->attr
.dummy
15662 && ((proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_IN
)
15663 || proc
->attr
.function
))
15666 /* TODO: Sort out what can be storage associated, if anything, and include
15667 it here. In principle equivalences should be scanned but it does not
15668 seem to be possible to storage associate an impure variable this way. */
15673 /* Test whether a symbol is pure or not. For a NULL pointer, checks if the
15674 current namespace is inside a pure procedure. */
15677 gfc_pure (gfc_symbol
*sym
)
15679 symbol_attribute attr
;
15684 /* Check if the current namespace or one of its parents
15685 belongs to a pure procedure. */
15686 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15688 sym
= ns
->proc_name
;
15692 if (attr
.flavor
== FL_PROCEDURE
&& attr
.pure
)
15700 return attr
.flavor
== FL_PROCEDURE
&& attr
.pure
;
15704 /* Test whether a symbol is implicitly pure or not. For a NULL pointer,
15705 checks if the current namespace is implicitly pure. Note that this
15706 function returns false for a PURE procedure. */
15709 gfc_implicit_pure (gfc_symbol
*sym
)
15715 /* Check if the current procedure is implicit_pure. Walk up
15716 the procedure list until we find a procedure. */
15717 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15719 sym
= ns
->proc_name
;
15723 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15728 return sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.implicit_pure
15729 && !sym
->attr
.pure
;
15734 gfc_unset_implicit_pure (gfc_symbol
*sym
)
15740 /* Check if the current procedure is implicit_pure. Walk up
15741 the procedure list until we find a procedure. */
15742 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15744 sym
= ns
->proc_name
;
15748 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15753 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15754 sym
->attr
.implicit_pure
= 0;
15756 sym
->attr
.pure
= 0;
15760 /* Test whether the current procedure is elemental or not. */
15763 gfc_elemental (gfc_symbol
*sym
)
15765 symbol_attribute attr
;
15768 sym
= gfc_current_ns
->proc_name
;
15773 return attr
.flavor
== FL_PROCEDURE
&& attr
.elemental
;
15777 /* Warn about unused labels. */
15780 warn_unused_fortran_label (gfc_st_label
*label
)
15785 warn_unused_fortran_label (label
->left
);
15787 if (label
->defined
== ST_LABEL_UNKNOWN
)
15790 switch (label
->referenced
)
15792 case ST_LABEL_UNKNOWN
:
15793 gfc_warning (OPT_Wunused_label
, "Label %d at %L defined but not used",
15794 label
->value
, &label
->where
);
15797 case ST_LABEL_BAD_TARGET
:
15798 gfc_warning (OPT_Wunused_label
,
15799 "Label %d at %L defined but cannot be used",
15800 label
->value
, &label
->where
);
15807 warn_unused_fortran_label (label
->right
);
15811 /* Returns the sequence type of a symbol or sequence. */
15814 sequence_type (gfc_typespec ts
)
15823 if (ts
.u
.derived
->components
== NULL
)
15824 return SEQ_NONDEFAULT
;
15826 result
= sequence_type (ts
.u
.derived
->components
->ts
);
15827 for (c
= ts
.u
.derived
->components
->next
; c
; c
= c
->next
)
15828 if (sequence_type (c
->ts
) != result
)
15834 if (ts
.kind
!= gfc_default_character_kind
)
15835 return SEQ_NONDEFAULT
;
15837 return SEQ_CHARACTER
;
15840 if (ts
.kind
!= gfc_default_integer_kind
)
15841 return SEQ_NONDEFAULT
;
15843 return SEQ_NUMERIC
;
15846 if (!(ts
.kind
== gfc_default_real_kind
15847 || ts
.kind
== gfc_default_double_kind
))
15848 return SEQ_NONDEFAULT
;
15850 return SEQ_NUMERIC
;
15853 if (ts
.kind
!= gfc_default_complex_kind
)
15854 return SEQ_NONDEFAULT
;
15856 return SEQ_NUMERIC
;
15859 if (ts
.kind
!= gfc_default_logical_kind
)
15860 return SEQ_NONDEFAULT
;
15862 return SEQ_NUMERIC
;
15865 return SEQ_NONDEFAULT
;
15870 /* Resolve derived type EQUIVALENCE object. */
15873 resolve_equivalence_derived (gfc_symbol
*derived
, gfc_symbol
*sym
, gfc_expr
*e
)
15875 gfc_component
*c
= derived
->components
;
15880 /* Shall not be an object of nonsequence derived type. */
15881 if (!derived
->attr
.sequence
)
15883 gfc_error ("Derived type variable %qs at %L must have SEQUENCE "
15884 "attribute to be an EQUIVALENCE object", sym
->name
,
15889 /* Shall not have allocatable components. */
15890 if (derived
->attr
.alloc_comp
)
15892 gfc_error ("Derived type variable %qs at %L cannot have ALLOCATABLE "
15893 "components to be an EQUIVALENCE object",sym
->name
,
15898 if (sym
->attr
.in_common
&& gfc_has_default_initializer (sym
->ts
.u
.derived
))
15900 gfc_error ("Derived type variable %qs at %L with default "
15901 "initialization cannot be in EQUIVALENCE with a variable "
15902 "in COMMON", sym
->name
, &e
->where
);
15906 for (; c
; c
= c
->next
)
15908 if (gfc_bt_struct (c
->ts
.type
)
15909 && (!resolve_equivalence_derived(c
->ts
.u
.derived
, sym
, e
)))
15912 /* Shall not be an object of sequence derived type containing a pointer
15913 in the structure. */
15914 if (c
->attr
.pointer
)
15916 gfc_error ("Derived type variable %qs at %L with pointer "
15917 "component(s) cannot be an EQUIVALENCE object",
15918 sym
->name
, &e
->where
);
15926 /* Resolve equivalence object.
15927 An EQUIVALENCE object shall not be a dummy argument, a pointer, a target,
15928 an allocatable array, an object of nonsequence derived type, an object of
15929 sequence derived type containing a pointer at any level of component
15930 selection, an automatic object, a function name, an entry name, a result
15931 name, a named constant, a structure component, or a subobject of any of
15932 the preceding objects. A substring shall not have length zero. A
15933 derived type shall not have components with default initialization nor
15934 shall two objects of an equivalence group be initialized.
15935 Either all or none of the objects shall have an protected attribute.
15936 The simple constraints are done in symbol.c(check_conflict) and the rest
15937 are implemented here. */
15940 resolve_equivalence (gfc_equiv
*eq
)
15943 gfc_symbol
*first_sym
;
15946 locus
*last_where
= NULL
;
15947 seq_type eq_type
, last_eq_type
;
15948 gfc_typespec
*last_ts
;
15949 int object
, cnt_protected
;
15952 last_ts
= &eq
->expr
->symtree
->n
.sym
->ts
;
15954 first_sym
= eq
->expr
->symtree
->n
.sym
;
15958 for (object
= 1; eq
; eq
= eq
->eq
, object
++)
15962 e
->ts
= e
->symtree
->n
.sym
->ts
;
15963 /* match_varspec might not know yet if it is seeing
15964 array reference or substring reference, as it doesn't
15966 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
)
15968 gfc_ref
*ref
= e
->ref
;
15969 sym
= e
->symtree
->n
.sym
;
15971 if (sym
->attr
.dimension
)
15973 ref
->u
.ar
.as
= sym
->as
;
15977 /* For substrings, convert REF_ARRAY into REF_SUBSTRING. */
15978 if (e
->ts
.type
== BT_CHARACTER
15980 && ref
->type
== REF_ARRAY
15981 && ref
->u
.ar
.dimen
== 1
15982 && ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
15983 && ref
->u
.ar
.stride
[0] == NULL
)
15985 gfc_expr
*start
= ref
->u
.ar
.start
[0];
15986 gfc_expr
*end
= ref
->u
.ar
.end
[0];
15989 /* Optimize away the (:) reference. */
15990 if (start
== NULL
&& end
== NULL
)
15993 e
->ref
= ref
->next
;
15995 e
->ref
->next
= ref
->next
;
16000 ref
->type
= REF_SUBSTRING
;
16002 start
= gfc_get_int_expr (gfc_charlen_int_kind
,
16004 ref
->u
.ss
.start
= start
;
16005 if (end
== NULL
&& e
->ts
.u
.cl
)
16006 end
= gfc_copy_expr (e
->ts
.u
.cl
->length
);
16007 ref
->u
.ss
.end
= end
;
16008 ref
->u
.ss
.length
= e
->ts
.u
.cl
;
16015 /* Any further ref is an error. */
16018 gcc_assert (ref
->type
== REF_ARRAY
);
16019 gfc_error ("Syntax error in EQUIVALENCE statement at %L",
16025 if (!gfc_resolve_expr (e
))
16028 sym
= e
->symtree
->n
.sym
;
16030 if (sym
->attr
.is_protected
)
16032 if (cnt_protected
> 0 && cnt_protected
!= object
)
16034 gfc_error ("Either all or none of the objects in the "
16035 "EQUIVALENCE set at %L shall have the "
16036 "PROTECTED attribute",
16041 /* Shall not equivalence common block variables in a PURE procedure. */
16042 if (sym
->ns
->proc_name
16043 && sym
->ns
->proc_name
->attr
.pure
16044 && sym
->attr
.in_common
)
16046 /* Need to check for symbols that may have entered the pure
16047 procedure via a USE statement. */
16048 bool saw_sym
= false;
16049 if (sym
->ns
->use_stmts
)
16052 for (r
= sym
->ns
->use_stmts
->rename
; r
; r
= r
->next
)
16053 if (strcmp(r
->use_name
, sym
->name
) == 0) saw_sym
= true;
16059 gfc_error ("COMMON block member %qs at %L cannot be an "
16060 "EQUIVALENCE object in the pure procedure %qs",
16061 sym
->name
, &e
->where
, sym
->ns
->proc_name
->name
);
16065 /* Shall not be a named constant. */
16066 if (e
->expr_type
== EXPR_CONSTANT
)
16068 gfc_error ("Named constant %qs at %L cannot be an EQUIVALENCE "
16069 "object", sym
->name
, &e
->where
);
16073 if (e
->ts
.type
== BT_DERIVED
16074 && !resolve_equivalence_derived (e
->ts
.u
.derived
, sym
, e
))
16077 /* Check that the types correspond correctly:
16079 A numeric sequence structure may be equivalenced to another sequence
16080 structure, an object of default integer type, default real type, double
16081 precision real type, default logical type such that components of the
16082 structure ultimately only become associated to objects of the same
16083 kind. A character sequence structure may be equivalenced to an object
16084 of default character kind or another character sequence structure.
16085 Other objects may be equivalenced only to objects of the same type and
16086 kind parameters. */
16088 /* Identical types are unconditionally OK. */
16089 if (object
== 1 || gfc_compare_types (last_ts
, &sym
->ts
))
16090 goto identical_types
;
16092 last_eq_type
= sequence_type (*last_ts
);
16093 eq_type
= sequence_type (sym
->ts
);
16095 /* Since the pair of objects is not of the same type, mixed or
16096 non-default sequences can be rejected. */
16098 msg
= "Sequence %s with mixed components in EQUIVALENCE "
16099 "statement at %L with different type objects";
16101 && last_eq_type
== SEQ_MIXED
16102 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16103 || (eq_type
== SEQ_MIXED
16104 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16107 msg
= "Non-default type object or sequence %s in EQUIVALENCE "
16108 "statement at %L with objects of different type";
16110 && last_eq_type
== SEQ_NONDEFAULT
16111 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16112 || (eq_type
== SEQ_NONDEFAULT
16113 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16116 msg
="Non-CHARACTER object %qs in default CHARACTER "
16117 "EQUIVALENCE statement at %L";
16118 if (last_eq_type
== SEQ_CHARACTER
16119 && eq_type
!= SEQ_CHARACTER
16120 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16123 msg
="Non-NUMERIC object %qs in default NUMERIC "
16124 "EQUIVALENCE statement at %L";
16125 if (last_eq_type
== SEQ_NUMERIC
16126 && eq_type
!= SEQ_NUMERIC
16127 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16132 last_where
= &e
->where
;
16137 /* Shall not be an automatic array. */
16138 if (e
->ref
->type
== REF_ARRAY
16139 && !gfc_resolve_array_spec (e
->ref
->u
.ar
.as
, 1))
16141 gfc_error ("Array %qs at %L with non-constant bounds cannot be "
16142 "an EQUIVALENCE object", sym
->name
, &e
->where
);
16149 /* Shall not be a structure component. */
16150 if (r
->type
== REF_COMPONENT
)
16152 gfc_error ("Structure component %qs at %L cannot be an "
16153 "EQUIVALENCE object",
16154 r
->u
.c
.component
->name
, &e
->where
);
16158 /* A substring shall not have length zero. */
16159 if (r
->type
== REF_SUBSTRING
)
16161 if (compare_bound (r
->u
.ss
.start
, r
->u
.ss
.end
) == CMP_GT
)
16163 gfc_error ("Substring at %L has length zero",
16164 &r
->u
.ss
.start
->where
);
16174 /* Function called by resolve_fntype to flag other symbol used in the
16175 length type parameter specification of function resuls. */
16178 flag_fn_result_spec (gfc_expr
*expr
,
16179 gfc_symbol
*sym ATTRIBUTE_UNUSED
,
16180 int *f ATTRIBUTE_UNUSED
)
16185 if (expr
->expr_type
== EXPR_VARIABLE
)
16187 s
= expr
->symtree
->n
.sym
;
16188 for (ns
= s
->ns
; ns
; ns
= ns
->parent
)
16192 if (!s
->fn_result_spec
16193 && s
->attr
.flavor
== FL_PARAMETER
)
16195 /* Function contained in a module.... */
16196 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_MODULE
)
16199 s
->fn_result_spec
= 1;
16200 /* Make sure that this symbol is translated as a module
16202 st
= gfc_get_unique_symtree (ns
);
16206 /* ... which is use associated and called. */
16207 else if (s
->attr
.use_assoc
|| s
->attr
.used_in_submodule
16209 /* External function matched with an interface. */
16212 && s
->ns
->proc_name
->attr
.if_source
== IFSRC_DECL
)
16213 || s
->ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16214 && s
->ns
->proc_name
->attr
.function
))
16215 s
->fn_result_spec
= 1;
16222 /* Resolve function and ENTRY types, issue diagnostics if needed. */
16225 resolve_fntype (gfc_namespace
*ns
)
16227 gfc_entry_list
*el
;
16230 if (ns
->proc_name
== NULL
|| !ns
->proc_name
->attr
.function
)
16233 /* If there are any entries, ns->proc_name is the entry master
16234 synthetic symbol and ns->entries->sym actual FUNCTION symbol. */
16236 sym
= ns
->entries
->sym
;
16238 sym
= ns
->proc_name
;
16239 if (sym
->result
== sym
16240 && sym
->ts
.type
== BT_UNKNOWN
16241 && !gfc_set_default_type (sym
, 0, NULL
)
16242 && !sym
->attr
.untyped
)
16244 gfc_error ("Function %qs at %L has no IMPLICIT type",
16245 sym
->name
, &sym
->declared_at
);
16246 sym
->attr
.untyped
= 1;
16249 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->ts
.u
.derived
->attr
.use_assoc
16250 && !sym
->attr
.contained
16251 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
16252 && gfc_check_symbol_access (sym
))
16254 gfc_notify_std (GFC_STD_F2003
, "PUBLIC function %qs at "
16255 "%L of PRIVATE type %qs", sym
->name
,
16256 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
16260 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
16262 if (el
->sym
->result
== el
->sym
16263 && el
->sym
->ts
.type
== BT_UNKNOWN
16264 && !gfc_set_default_type (el
->sym
, 0, NULL
)
16265 && !el
->sym
->attr
.untyped
)
16267 gfc_error ("ENTRY %qs at %L has no IMPLICIT type",
16268 el
->sym
->name
, &el
->sym
->declared_at
);
16269 el
->sym
->attr
.untyped
= 1;
16273 if (sym
->ts
.type
== BT_CHARACTER
)
16274 gfc_traverse_expr (sym
->ts
.u
.cl
->length
, NULL
, flag_fn_result_spec
, 0);
16278 /* 12.3.2.1.1 Defined operators. */
16281 check_uop_procedure (gfc_symbol
*sym
, locus where
)
16283 gfc_formal_arglist
*formal
;
16285 if (!sym
->attr
.function
)
16287 gfc_error ("User operator procedure %qs at %L must be a FUNCTION",
16288 sym
->name
, &where
);
16292 if (sym
->ts
.type
== BT_CHARACTER
16293 && !((sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
) || sym
->ts
.deferred
)
16294 && !(sym
->result
&& ((sym
->result
->ts
.u
.cl
16295 && sym
->result
->ts
.u
.cl
->length
) || sym
->result
->ts
.deferred
)))
16297 gfc_error ("User operator procedure %qs at %L cannot be assumed "
16298 "character length", sym
->name
, &where
);
16302 formal
= gfc_sym_get_dummy_args (sym
);
16303 if (!formal
|| !formal
->sym
)
16305 gfc_error ("User operator procedure %qs at %L must have at least "
16306 "one argument", sym
->name
, &where
);
16310 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16312 gfc_error ("First argument of operator interface at %L must be "
16313 "INTENT(IN)", &where
);
16317 if (formal
->sym
->attr
.optional
)
16319 gfc_error ("First argument of operator interface at %L cannot be "
16320 "optional", &where
);
16324 formal
= formal
->next
;
16325 if (!formal
|| !formal
->sym
)
16328 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16330 gfc_error ("Second argument of operator interface at %L must be "
16331 "INTENT(IN)", &where
);
16335 if (formal
->sym
->attr
.optional
)
16337 gfc_error ("Second argument of operator interface at %L cannot be "
16338 "optional", &where
);
16344 gfc_error ("Operator interface at %L must have, at most, two "
16345 "arguments", &where
);
16353 gfc_resolve_uops (gfc_symtree
*symtree
)
16355 gfc_interface
*itr
;
16357 if (symtree
== NULL
)
16360 gfc_resolve_uops (symtree
->left
);
16361 gfc_resolve_uops (symtree
->right
);
16363 for (itr
= symtree
->n
.uop
->op
; itr
; itr
= itr
->next
)
16364 check_uop_procedure (itr
->sym
, itr
->sym
->declared_at
);
16368 /* Examine all of the expressions associated with a program unit,
16369 assign types to all intermediate expressions, make sure that all
16370 assignments are to compatible types and figure out which names
16371 refer to which functions or subroutines. It doesn't check code
16372 block, which is handled by gfc_resolve_code. */
16375 resolve_types (gfc_namespace
*ns
)
16381 gfc_namespace
* old_ns
= gfc_current_ns
;
16383 if (ns
->types_resolved
)
16386 /* Check that all IMPLICIT types are ok. */
16387 if (!ns
->seen_implicit_none
)
16390 for (letter
= 0; letter
!= GFC_LETTERS
; ++letter
)
16391 if (ns
->set_flag
[letter
]
16392 && !resolve_typespec_used (&ns
->default_type
[letter
],
16393 &ns
->implicit_loc
[letter
], NULL
))
16397 gfc_current_ns
= ns
;
16399 resolve_entries (ns
);
16401 resolve_common_vars (&ns
->blank_common
, false);
16402 resolve_common_blocks (ns
->common_root
);
16404 resolve_contained_functions (ns
);
16406 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
16407 && ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16408 resolve_formal_arglist (ns
->proc_name
);
16410 gfc_traverse_ns (ns
, resolve_bind_c_derived_types
);
16412 for (cl
= ns
->cl_list
; cl
; cl
= cl
->next
)
16413 resolve_charlen (cl
);
16415 gfc_traverse_ns (ns
, resolve_symbol
);
16417 resolve_fntype (ns
);
16419 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16421 if (gfc_pure (ns
->proc_name
) && !gfc_pure (n
->proc_name
))
16422 gfc_error ("Contained procedure %qs at %L of a PURE procedure must "
16423 "also be PURE", n
->proc_name
->name
,
16424 &n
->proc_name
->declared_at
);
16430 gfc_do_concurrent_flag
= 0;
16431 gfc_check_interfaces (ns
);
16433 gfc_traverse_ns (ns
, resolve_values
);
16439 for (d
= ns
->data
; d
; d
= d
->next
)
16443 gfc_traverse_ns (ns
, gfc_formalize_init_value
);
16445 gfc_traverse_ns (ns
, gfc_verify_binding_labels
);
16447 for (eq
= ns
->equiv
; eq
; eq
= eq
->next
)
16448 resolve_equivalence (eq
);
16450 /* Warn about unused labels. */
16451 if (warn_unused_label
)
16452 warn_unused_fortran_label (ns
->st_labels
);
16454 gfc_resolve_uops (ns
->uop_root
);
16456 gfc_traverse_ns (ns
, gfc_verify_DTIO_procedures
);
16458 gfc_resolve_omp_declare_simd (ns
);
16460 gfc_resolve_omp_udrs (ns
->omp_udr_root
);
16462 ns
->types_resolved
= 1;
16464 gfc_current_ns
= old_ns
;
16468 /* Call gfc_resolve_code recursively. */
16471 resolve_codes (gfc_namespace
*ns
)
16474 bitmap_obstack old_obstack
;
16476 if (ns
->resolved
== 1)
16479 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16482 gfc_current_ns
= ns
;
16484 /* Don't clear 'cs_base' if this is the namespace of a BLOCK construct. */
16485 if (!(ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_LABEL
))
16488 /* Set to an out of range value. */
16489 current_entry_id
= -1;
16491 old_obstack
= labels_obstack
;
16492 bitmap_obstack_initialize (&labels_obstack
);
16494 gfc_resolve_oacc_declare (ns
);
16495 gfc_resolve_omp_local_vars (ns
);
16496 gfc_resolve_code (ns
->code
, ns
);
16498 bitmap_obstack_release (&labels_obstack
);
16499 labels_obstack
= old_obstack
;
16503 /* This function is called after a complete program unit has been compiled.
16504 Its purpose is to examine all of the expressions associated with a program
16505 unit, assign types to all intermediate expressions, make sure that all
16506 assignments are to compatible types and figure out which names refer to
16507 which functions or subroutines. */
16510 gfc_resolve (gfc_namespace
*ns
)
16512 gfc_namespace
*old_ns
;
16513 code_stack
*old_cs_base
;
16514 struct gfc_omp_saved_state old_omp_state
;
16520 old_ns
= gfc_current_ns
;
16521 old_cs_base
= cs_base
;
16523 /* As gfc_resolve can be called during resolution of an OpenMP construct
16524 body, we should clear any state associated to it, so that say NS's
16525 DO loops are not interpreted as OpenMP loops. */
16526 if (!ns
->construct_entities
)
16527 gfc_omp_save_and_clear_state (&old_omp_state
);
16529 resolve_types (ns
);
16530 component_assignment_level
= 0;
16531 resolve_codes (ns
);
16533 gfc_current_ns
= old_ns
;
16534 cs_base
= old_cs_base
;
16537 gfc_run_passes (ns
);
16539 if (!ns
->construct_entities
)
16540 gfc_omp_restore_state (&old_omp_state
);