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 gfc_error ("Argument %qs of statement function at %L must "
516 "be scalar", sym
->name
, &sym
->declared_at
);
520 if (sym
->ts
.type
== BT_CHARACTER
)
522 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
523 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
525 gfc_error ("Character-valued argument %qs of statement "
526 "function at %L must have constant length",
527 sym
->name
, &sym
->declared_at
);
533 formal_arg_flag
= false;
537 /* Work function called when searching for symbols that have argument lists
538 associated with them. */
541 find_arglists (gfc_symbol
*sym
)
543 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
|| sym
->ns
!= gfc_current_ns
544 || gfc_fl_struct (sym
->attr
.flavor
) || sym
->attr
.intrinsic
)
547 resolve_formal_arglist (sym
);
551 /* Given a namespace, resolve all formal argument lists within the namespace.
555 resolve_formal_arglists (gfc_namespace
*ns
)
560 gfc_traverse_ns (ns
, find_arglists
);
565 resolve_contained_fntype (gfc_symbol
*sym
, gfc_namespace
*ns
)
569 if (sym
&& sym
->attr
.flavor
== FL_PROCEDURE
571 && sym
->ns
->parent
->proc_name
572 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_PROCEDURE
573 && !strcmp (sym
->name
, sym
->ns
->parent
->proc_name
->name
))
574 gfc_error ("Contained procedure %qs at %L has the same name as its "
575 "encompassing procedure", sym
->name
, &sym
->declared_at
);
577 /* If this namespace is not a function or an entry master function,
579 if (! sym
|| !(sym
->attr
.function
|| sym
->attr
.flavor
== FL_VARIABLE
)
580 || sym
->attr
.entry_master
)
583 /* Try to find out of what the return type is. */
584 if (sym
->result
->ts
.type
== BT_UNKNOWN
&& sym
->result
->ts
.interface
== NULL
)
586 t
= gfc_set_default_type (sym
->result
, 0, ns
);
588 if (!t
&& !sym
->result
->attr
.untyped
)
590 if (sym
->result
== sym
)
591 gfc_error ("Contained function %qs at %L has no IMPLICIT type",
592 sym
->name
, &sym
->declared_at
);
593 else if (!sym
->result
->attr
.proc_pointer
)
594 gfc_error ("Result %qs of contained function %qs at %L has "
595 "no IMPLICIT type", sym
->result
->name
, sym
->name
,
596 &sym
->result
->declared_at
);
597 sym
->result
->attr
.untyped
= 1;
601 /* Fortran 95 Draft Standard, page 51, Section 5.1.1.5, on the Character
602 type, lists the only ways a character length value of * can be used:
603 dummy arguments of procedures, named constants, and function results
604 in external functions. Internal function results and results of module
605 procedures are not on this list, ergo, not permitted. */
607 if (sym
->result
->ts
.type
== BT_CHARACTER
)
609 gfc_charlen
*cl
= sym
->result
->ts
.u
.cl
;
610 if ((!cl
|| !cl
->length
) && !sym
->result
->ts
.deferred
)
612 /* See if this is a module-procedure and adapt error message
615 gcc_assert (ns
->parent
&& ns
->parent
->proc_name
);
616 module_proc
= (ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
);
618 gfc_error (module_proc
619 ? G_("Character-valued module procedure %qs at %L"
620 " must not be assumed length")
621 : G_("Character-valued internal function %qs at %L"
622 " must not be assumed length"),
623 sym
->name
, &sym
->declared_at
);
629 /* Add NEW_ARGS to the formal argument list of PROC, taking care not to
630 introduce duplicates. */
633 merge_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
635 gfc_formal_arglist
*f
, *new_arglist
;
638 for (; new_args
!= NULL
; new_args
= new_args
->next
)
640 new_sym
= new_args
->sym
;
641 /* See if this arg is already in the formal argument list. */
642 for (f
= proc
->formal
; f
; f
= f
->next
)
644 if (new_sym
== f
->sym
)
651 /* Add a new argument. Argument order is not important. */
652 new_arglist
= gfc_get_formal_arglist ();
653 new_arglist
->sym
= new_sym
;
654 new_arglist
->next
= proc
->formal
;
655 proc
->formal
= new_arglist
;
660 /* Flag the arguments that are not present in all entries. */
663 check_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
665 gfc_formal_arglist
*f
, *head
;
668 for (f
= proc
->formal
; f
; f
= f
->next
)
673 for (new_args
= head
; new_args
; new_args
= new_args
->next
)
675 if (new_args
->sym
== f
->sym
)
682 f
->sym
->attr
.not_always_present
= 1;
687 /* Resolve alternate entry points. If a symbol has multiple entry points we
688 create a new master symbol for the main routine, and turn the existing
689 symbol into an entry point. */
692 resolve_entries (gfc_namespace
*ns
)
694 gfc_namespace
*old_ns
;
698 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
699 static int master_count
= 0;
701 if (ns
->proc_name
== NULL
)
704 /* No need to do anything if this procedure doesn't have alternate entry
709 /* We may already have resolved alternate entry points. */
710 if (ns
->proc_name
->attr
.entry_master
)
713 /* If this isn't a procedure something has gone horribly wrong. */
714 gcc_assert (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
);
716 /* Remember the current namespace. */
717 old_ns
= gfc_current_ns
;
721 /* Add the main entry point to the list of entry points. */
722 el
= gfc_get_entry_list ();
723 el
->sym
= ns
->proc_name
;
725 el
->next
= ns
->entries
;
727 ns
->proc_name
->attr
.entry
= 1;
729 /* If it is a module function, it needs to be in the right namespace
730 so that gfc_get_fake_result_decl can gather up the results. The
731 need for this arose in get_proc_name, where these beasts were
732 left in their own namespace, to keep prior references linked to
733 the entry declaration.*/
734 if (ns
->proc_name
->attr
.function
735 && ns
->parent
&& ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
738 /* Do the same for entries where the master is not a module
739 procedure. These are retained in the module namespace because
740 of the module procedure declaration. */
741 for (el
= el
->next
; el
; el
= el
->next
)
742 if (el
->sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
743 && el
->sym
->attr
.mod_proc
)
747 /* Add an entry statement for it. */
748 c
= gfc_get_code (EXEC_ENTRY
);
753 /* Create a new symbol for the master function. */
754 /* Give the internal function a unique name (within this file).
755 Also include the function name so the user has some hope of figuring
756 out what is going on. */
757 snprintf (name
, GFC_MAX_SYMBOL_LEN
, "master.%d.%s",
758 master_count
++, ns
->proc_name
->name
);
759 gfc_get_ha_symbol (name
, &proc
);
760 gcc_assert (proc
!= NULL
);
762 gfc_add_procedure (&proc
->attr
, PROC_INTERNAL
, proc
->name
, NULL
);
763 if (ns
->proc_name
->attr
.subroutine
)
764 gfc_add_subroutine (&proc
->attr
, proc
->name
, NULL
);
768 gfc_typespec
*ts
, *fts
;
769 gfc_array_spec
*as
, *fas
;
770 gfc_add_function (&proc
->attr
, proc
->name
, NULL
);
772 fas
= ns
->entries
->sym
->as
;
773 fas
= fas
? fas
: ns
->entries
->sym
->result
->as
;
774 fts
= &ns
->entries
->sym
->result
->ts
;
775 if (fts
->type
== BT_UNKNOWN
)
776 fts
= gfc_get_default_type (ns
->entries
->sym
->result
->name
, NULL
);
777 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
779 ts
= &el
->sym
->result
->ts
;
781 as
= as
? as
: el
->sym
->result
->as
;
782 if (ts
->type
== BT_UNKNOWN
)
783 ts
= gfc_get_default_type (el
->sym
->result
->name
, NULL
);
785 if (! gfc_compare_types (ts
, fts
)
786 || (el
->sym
->result
->attr
.dimension
787 != ns
->entries
->sym
->result
->attr
.dimension
)
788 || (el
->sym
->result
->attr
.pointer
789 != ns
->entries
->sym
->result
->attr
.pointer
))
791 else if (as
&& fas
&& ns
->entries
->sym
->result
!= el
->sym
->result
792 && gfc_compare_array_spec (as
, fas
) == 0)
793 gfc_error ("Function %s at %L has entries with mismatched "
794 "array specifications", ns
->entries
->sym
->name
,
795 &ns
->entries
->sym
->declared_at
);
796 /* The characteristics need to match and thus both need to have
797 the same string length, i.e. both len=*, or both len=4.
798 Having both len=<variable> is also possible, but difficult to
799 check at compile time. */
800 else if (ts
->type
== BT_CHARACTER
&& ts
->u
.cl
&& fts
->u
.cl
801 && (((ts
->u
.cl
->length
&& !fts
->u
.cl
->length
)
802 ||(!ts
->u
.cl
->length
&& fts
->u
.cl
->length
))
804 && ts
->u
.cl
->length
->expr_type
805 != fts
->u
.cl
->length
->expr_type
)
807 && ts
->u
.cl
->length
->expr_type
== EXPR_CONSTANT
808 && mpz_cmp (ts
->u
.cl
->length
->value
.integer
,
809 fts
->u
.cl
->length
->value
.integer
) != 0)))
810 gfc_notify_std (GFC_STD_GNU
, "Function %s at %L with "
811 "entries returning variables of different "
812 "string lengths", ns
->entries
->sym
->name
,
813 &ns
->entries
->sym
->declared_at
);
818 sym
= ns
->entries
->sym
->result
;
819 /* All result types the same. */
821 if (sym
->attr
.dimension
)
822 gfc_set_array_spec (proc
, gfc_copy_array_spec (sym
->as
), NULL
);
823 if (sym
->attr
.pointer
)
824 gfc_add_pointer (&proc
->attr
, NULL
);
828 /* Otherwise the result will be passed through a union by
830 proc
->attr
.mixed_entry_master
= 1;
831 for (el
= ns
->entries
; el
; el
= el
->next
)
833 sym
= el
->sym
->result
;
834 if (sym
->attr
.dimension
)
836 if (el
== ns
->entries
)
837 gfc_error ("FUNCTION result %s can't be an array in "
838 "FUNCTION %s at %L", sym
->name
,
839 ns
->entries
->sym
->name
, &sym
->declared_at
);
841 gfc_error ("ENTRY result %s can't be an array in "
842 "FUNCTION %s at %L", sym
->name
,
843 ns
->entries
->sym
->name
, &sym
->declared_at
);
845 else if (sym
->attr
.pointer
)
847 if (el
== ns
->entries
)
848 gfc_error ("FUNCTION result %s can't be a POINTER in "
849 "FUNCTION %s at %L", sym
->name
,
850 ns
->entries
->sym
->name
, &sym
->declared_at
);
852 gfc_error ("ENTRY result %s can't be a POINTER in "
853 "FUNCTION %s at %L", sym
->name
,
854 ns
->entries
->sym
->name
, &sym
->declared_at
);
859 if (ts
->type
== BT_UNKNOWN
)
860 ts
= gfc_get_default_type (sym
->name
, NULL
);
864 if (ts
->kind
== gfc_default_integer_kind
)
868 if (ts
->kind
== gfc_default_real_kind
869 || ts
->kind
== gfc_default_double_kind
)
873 if (ts
->kind
== gfc_default_complex_kind
)
877 if (ts
->kind
== gfc_default_logical_kind
)
881 /* We will issue error elsewhere. */
889 if (el
== ns
->entries
)
890 gfc_error ("FUNCTION result %s can't be of type %s "
891 "in FUNCTION %s at %L", sym
->name
,
892 gfc_typename (ts
), ns
->entries
->sym
->name
,
895 gfc_error ("ENTRY result %s can't be of type %s "
896 "in FUNCTION %s at %L", sym
->name
,
897 gfc_typename (ts
), ns
->entries
->sym
->name
,
904 proc
->attr
.access
= ACCESS_PRIVATE
;
905 proc
->attr
.entry_master
= 1;
907 /* Merge all the entry point arguments. */
908 for (el
= ns
->entries
; el
; el
= el
->next
)
909 merge_argument_lists (proc
, el
->sym
->formal
);
911 /* Check the master formal arguments for any that are not
912 present in all entry points. */
913 for (el
= ns
->entries
; el
; el
= el
->next
)
914 check_argument_lists (proc
, el
->sym
->formal
);
916 /* Use the master function for the function body. */
917 ns
->proc_name
= proc
;
919 /* Finalize the new symbols. */
920 gfc_commit_symbols ();
922 /* Restore the original namespace. */
923 gfc_current_ns
= old_ns
;
927 /* Resolve common variables. */
929 resolve_common_vars (gfc_common_head
*common_block
, bool named_common
)
931 gfc_symbol
*csym
= common_block
->head
;
933 for (; csym
; csym
= csym
->common_next
)
935 /* gfc_add_in_common may have been called before, but the reported errors
936 have been ignored to continue parsing.
937 We do the checks again here. */
938 if (!csym
->attr
.use_assoc
)
939 gfc_add_in_common (&csym
->attr
, csym
->name
, &common_block
->where
);
941 if (csym
->value
|| csym
->attr
.data
)
943 if (!csym
->ns
->is_block_data
)
944 gfc_notify_std (GFC_STD_GNU
, "Variable %qs at %L is in COMMON "
945 "but only in BLOCK DATA initialization is "
946 "allowed", csym
->name
, &csym
->declared_at
);
947 else if (!named_common
)
948 gfc_notify_std (GFC_STD_GNU
, "Initialized variable %qs at %L is "
949 "in a blank COMMON but initialization is only "
950 "allowed in named common blocks", csym
->name
,
954 if (UNLIMITED_POLY (csym
))
955 gfc_error_now ("%qs in cannot appear in COMMON at %L "
956 "[F2008:C5100]", csym
->name
, &csym
->declared_at
);
958 if (csym
->ts
.type
!= BT_DERIVED
)
961 if (!(csym
->ts
.u
.derived
->attr
.sequence
962 || csym
->ts
.u
.derived
->attr
.is_bind_c
))
963 gfc_error_now ("Derived type variable %qs in COMMON at %L "
964 "has neither the SEQUENCE nor the BIND(C) "
965 "attribute", csym
->name
, &csym
->declared_at
);
966 if (csym
->ts
.u
.derived
->attr
.alloc_comp
)
967 gfc_error_now ("Derived type variable %qs in COMMON at %L "
968 "has an ultimate component that is "
969 "allocatable", csym
->name
, &csym
->declared_at
);
970 if (gfc_has_default_initializer (csym
->ts
.u
.derived
))
971 gfc_error_now ("Derived type variable %qs in COMMON at %L "
972 "may not have default initializer", csym
->name
,
975 if (csym
->attr
.flavor
== FL_UNKNOWN
&& !csym
->attr
.proc_pointer
)
976 gfc_add_flavor (&csym
->attr
, FL_VARIABLE
, csym
->name
, &csym
->declared_at
);
980 /* Resolve common blocks. */
982 resolve_common_blocks (gfc_symtree
*common_root
)
987 if (common_root
== NULL
)
990 if (common_root
->left
)
991 resolve_common_blocks (common_root
->left
);
992 if (common_root
->right
)
993 resolve_common_blocks (common_root
->right
);
995 resolve_common_vars (common_root
->n
.common
, true);
997 /* The common name is a global name - in Fortran 2003 also if it has a
998 C binding name, since Fortran 2008 only the C binding name is a global
1000 if (!common_root
->n
.common
->binding_label
1001 || gfc_notification_std (GFC_STD_F2008
))
1003 gsym
= gfc_find_gsymbol (gfc_gsym_root
,
1004 common_root
->n
.common
->name
);
1006 if (gsym
&& gfc_notification_std (GFC_STD_F2008
)
1007 && gsym
->type
== GSYM_COMMON
1008 && ((common_root
->n
.common
->binding_label
1009 && (!gsym
->binding_label
1010 || strcmp (common_root
->n
.common
->binding_label
,
1011 gsym
->binding_label
) != 0))
1012 || (!common_root
->n
.common
->binding_label
1013 && gsym
->binding_label
)))
1015 gfc_error ("In Fortran 2003 COMMON %qs block at %L is a global "
1016 "identifier and must thus have the same binding name "
1017 "as the same-named COMMON block at %L: %s vs %s",
1018 common_root
->n
.common
->name
, &common_root
->n
.common
->where
,
1020 common_root
->n
.common
->binding_label
1021 ? common_root
->n
.common
->binding_label
: "(blank)",
1022 gsym
->binding_label
? gsym
->binding_label
: "(blank)");
1026 if (gsym
&& gsym
->type
!= GSYM_COMMON
1027 && !common_root
->n
.common
->binding_label
)
1029 gfc_error ("COMMON block %qs at %L uses the same global identifier "
1031 common_root
->n
.common
->name
, &common_root
->n
.common
->where
,
1035 if (gsym
&& gsym
->type
!= GSYM_COMMON
)
1037 gfc_error ("Fortran 2008: COMMON block %qs with binding label at "
1038 "%L sharing the identifier with global non-COMMON-block "
1039 "entity at %L", common_root
->n
.common
->name
,
1040 &common_root
->n
.common
->where
, &gsym
->where
);
1045 gsym
= gfc_get_gsymbol (common_root
->n
.common
->name
);
1046 gsym
->type
= GSYM_COMMON
;
1047 gsym
->where
= common_root
->n
.common
->where
;
1053 if (common_root
->n
.common
->binding_label
)
1055 gsym
= gfc_find_gsymbol (gfc_gsym_root
,
1056 common_root
->n
.common
->binding_label
);
1057 if (gsym
&& gsym
->type
!= GSYM_COMMON
)
1059 gfc_error ("COMMON block at %L with binding label %qs uses the same "
1060 "global identifier as entity at %L",
1061 &common_root
->n
.common
->where
,
1062 common_root
->n
.common
->binding_label
, &gsym
->where
);
1067 gsym
= gfc_get_gsymbol (common_root
->n
.common
->binding_label
);
1068 gsym
->type
= GSYM_COMMON
;
1069 gsym
->where
= common_root
->n
.common
->where
;
1075 gfc_find_symbol (common_root
->name
, gfc_current_ns
, 0, &sym
);
1079 if (sym
->attr
.flavor
== FL_PARAMETER
)
1080 gfc_error ("COMMON block %qs at %L is used as PARAMETER at %L",
1081 sym
->name
, &common_root
->n
.common
->where
, &sym
->declared_at
);
1083 if (sym
->attr
.external
)
1084 gfc_error ("COMMON block %qs at %L can not have the EXTERNAL attribute",
1085 sym
->name
, &common_root
->n
.common
->where
);
1087 if (sym
->attr
.intrinsic
)
1088 gfc_error ("COMMON block %qs at %L is also an intrinsic procedure",
1089 sym
->name
, &common_root
->n
.common
->where
);
1090 else if (sym
->attr
.result
1091 || gfc_is_function_return_value (sym
, gfc_current_ns
))
1092 gfc_notify_std (GFC_STD_F2003
, "COMMON block %qs at %L "
1093 "that is also a function result", sym
->name
,
1094 &common_root
->n
.common
->where
);
1095 else if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.proc
!= PROC_INTERNAL
1096 && sym
->attr
.proc
!= PROC_ST_FUNCTION
)
1097 gfc_notify_std (GFC_STD_F2003
, "COMMON block %qs at %L "
1098 "that is also a global procedure", sym
->name
,
1099 &common_root
->n
.common
->where
);
1103 /* Resolve contained function types. Because contained functions can call one
1104 another, they have to be worked out before any of the contained procedures
1107 The good news is that if a function doesn't already have a type, the only
1108 way it can get one is through an IMPLICIT type or a RESULT variable, because
1109 by definition contained functions are contained namespace they're contained
1110 in, not in a sibling or parent namespace. */
1113 resolve_contained_functions (gfc_namespace
*ns
)
1115 gfc_namespace
*child
;
1118 resolve_formal_arglists (ns
);
1120 for (child
= ns
->contained
; child
; child
= child
->sibling
)
1122 /* Resolve alternate entry points first. */
1123 resolve_entries (child
);
1125 /* Then check function return types. */
1126 resolve_contained_fntype (child
->proc_name
, child
);
1127 for (el
= child
->entries
; el
; el
= el
->next
)
1128 resolve_contained_fntype (el
->sym
, child
);
1134 /* A Parameterized Derived Type constructor must contain values for
1135 the PDT KIND parameters or they must have a default initializer.
1136 Go through the constructor picking out the KIND expressions,
1137 storing them in 'param_list' and then call gfc_get_pdt_instance
1138 to obtain the PDT instance. */
1140 static gfc_actual_arglist
*param_list
, *param_tail
, *param
;
1143 get_pdt_spec_expr (gfc_component
*c
, gfc_expr
*expr
)
1145 param
= gfc_get_actual_arglist ();
1147 param_list
= param_tail
= param
;
1150 param_tail
->next
= param
;
1151 param_tail
= param_tail
->next
;
1154 param_tail
->name
= c
->name
;
1156 param_tail
->expr
= gfc_copy_expr (expr
);
1157 else if (c
->initializer
)
1158 param_tail
->expr
= gfc_copy_expr (c
->initializer
);
1161 param_tail
->spec_type
= SPEC_ASSUMED
;
1162 if (c
->attr
.pdt_kind
)
1164 gfc_error ("The KIND parameter %qs in the PDT constructor "
1165 "at %C has no value", param
->name
);
1174 get_pdt_constructor (gfc_expr
*expr
, gfc_constructor
**constr
,
1175 gfc_symbol
*derived
)
1177 gfc_constructor
*cons
= NULL
;
1178 gfc_component
*comp
;
1181 if (expr
&& expr
->expr_type
== EXPR_STRUCTURE
)
1182 cons
= gfc_constructor_first (expr
->value
.constructor
);
1187 comp
= derived
->components
;
1189 for (; comp
&& cons
; comp
= comp
->next
, cons
= gfc_constructor_next (cons
))
1192 && cons
->expr
->expr_type
== EXPR_STRUCTURE
1193 && comp
->ts
.type
== BT_DERIVED
)
1195 t
= get_pdt_constructor (cons
->expr
, NULL
, comp
->ts
.u
.derived
);
1199 else if (comp
->ts
.type
== BT_DERIVED
)
1201 t
= get_pdt_constructor (NULL
, &cons
, comp
->ts
.u
.derived
);
1205 else if ((comp
->attr
.pdt_kind
|| comp
->attr
.pdt_len
)
1206 && derived
->attr
.pdt_template
)
1208 t
= get_pdt_spec_expr (comp
, cons
->expr
);
1217 static bool resolve_fl_derived0 (gfc_symbol
*sym
);
1218 static bool resolve_fl_struct (gfc_symbol
*sym
);
1221 /* Resolve all of the elements of a structure constructor and make sure that
1222 the types are correct. The 'init' flag indicates that the given
1223 constructor is an initializer. */
1226 resolve_structure_cons (gfc_expr
*expr
, int init
)
1228 gfc_constructor
*cons
;
1229 gfc_component
*comp
;
1235 if (expr
->ts
.type
== BT_DERIVED
|| expr
->ts
.type
== BT_UNION
)
1237 if (expr
->ts
.u
.derived
->attr
.flavor
== FL_DERIVED
)
1238 resolve_fl_derived0 (expr
->ts
.u
.derived
);
1240 resolve_fl_struct (expr
->ts
.u
.derived
);
1242 /* If this is a Parameterized Derived Type template, find the
1243 instance corresponding to the PDT kind parameters. */
1244 if (expr
->ts
.u
.derived
->attr
.pdt_template
)
1247 t
= get_pdt_constructor (expr
, NULL
, expr
->ts
.u
.derived
);
1250 gfc_get_pdt_instance (param_list
, &expr
->ts
.u
.derived
, NULL
);
1252 expr
->param_list
= gfc_copy_actual_arglist (param_list
);
1255 gfc_free_actual_arglist (param_list
);
1257 if (!expr
->ts
.u
.derived
->attr
.pdt_type
)
1262 cons
= gfc_constructor_first (expr
->value
.constructor
);
1264 /* A constructor may have references if it is the result of substituting a
1265 parameter variable. In this case we just pull out the component we
1268 comp
= expr
->ref
->u
.c
.sym
->components
;
1270 comp
= expr
->ts
.u
.derived
->components
;
1272 for (; comp
&& cons
; comp
= comp
->next
, cons
= gfc_constructor_next (cons
))
1279 /* Unions use an EXPR_NULL contrived expression to tell the translation
1280 phase to generate an initializer of the appropriate length.
1282 if (cons
->expr
->ts
.type
== BT_UNION
&& cons
->expr
->expr_type
== EXPR_NULL
)
1285 if (!gfc_resolve_expr (cons
->expr
))
1291 rank
= comp
->as
? comp
->as
->rank
: 0;
1292 if (comp
->ts
.type
== BT_CLASS
1293 && !comp
->ts
.u
.derived
->attr
.unlimited_polymorphic
1294 && CLASS_DATA (comp
)->as
)
1295 rank
= CLASS_DATA (comp
)->as
->rank
;
1297 if (cons
->expr
->expr_type
!= EXPR_NULL
&& rank
!= cons
->expr
->rank
1298 && (comp
->attr
.allocatable
|| cons
->expr
->rank
))
1300 gfc_error ("The rank of the element in the structure "
1301 "constructor at %L does not match that of the "
1302 "component (%d/%d)", &cons
->expr
->where
,
1303 cons
->expr
->rank
, rank
);
1307 /* If we don't have the right type, try to convert it. */
1309 if (!comp
->attr
.proc_pointer
&&
1310 !gfc_compare_types (&cons
->expr
->ts
, &comp
->ts
))
1312 if (strcmp (comp
->name
, "_extends") == 0)
1314 /* Can afford to be brutal with the _extends initializer.
1315 The derived type can get lost because it is PRIVATE
1316 but it is not usage constrained by the standard. */
1317 cons
->expr
->ts
= comp
->ts
;
1319 else if (comp
->attr
.pointer
&& cons
->expr
->ts
.type
!= BT_UNKNOWN
)
1321 gfc_error ("The element in the structure constructor at %L, "
1322 "for pointer component %qs, is %s but should be %s",
1323 &cons
->expr
->where
, comp
->name
,
1324 gfc_basic_typename (cons
->expr
->ts
.type
),
1325 gfc_basic_typename (comp
->ts
.type
));
1330 bool t2
= gfc_convert_type (cons
->expr
, &comp
->ts
, 1);
1336 /* For strings, the length of the constructor should be the same as
1337 the one of the structure, ensure this if the lengths are known at
1338 compile time and when we are dealing with PARAMETER or structure
1340 if (cons
->expr
->ts
.type
== BT_CHARACTER
&& comp
->ts
.u
.cl
1341 && comp
->ts
.u
.cl
->length
1342 && comp
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
1343 && cons
->expr
->ts
.u
.cl
&& cons
->expr
->ts
.u
.cl
->length
1344 && cons
->expr
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
1345 && cons
->expr
->rank
!= 0
1346 && mpz_cmp (cons
->expr
->ts
.u
.cl
->length
->value
.integer
,
1347 comp
->ts
.u
.cl
->length
->value
.integer
) != 0)
1349 if (cons
->expr
->expr_type
== EXPR_VARIABLE
1350 && cons
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
)
1352 /* Wrap the parameter in an array constructor (EXPR_ARRAY)
1353 to make use of the gfc_resolve_character_array_constructor
1354 machinery. The expression is later simplified away to
1355 an array of string literals. */
1356 gfc_expr
*para
= cons
->expr
;
1357 cons
->expr
= gfc_get_expr ();
1358 cons
->expr
->ts
= para
->ts
;
1359 cons
->expr
->where
= para
->where
;
1360 cons
->expr
->expr_type
= EXPR_ARRAY
;
1361 cons
->expr
->rank
= para
->rank
;
1362 cons
->expr
->shape
= gfc_copy_shape (para
->shape
, para
->rank
);
1363 gfc_constructor_append_expr (&cons
->expr
->value
.constructor
,
1364 para
, &cons
->expr
->where
);
1367 if (cons
->expr
->expr_type
== EXPR_ARRAY
)
1369 /* Rely on the cleanup of the namespace to deal correctly with
1370 the old charlen. (There was a block here that attempted to
1371 remove the charlen but broke the chain in so doing.) */
1372 cons
->expr
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1373 cons
->expr
->ts
.u
.cl
->length_from_typespec
= true;
1374 cons
->expr
->ts
.u
.cl
->length
= gfc_copy_expr (comp
->ts
.u
.cl
->length
);
1375 gfc_resolve_character_array_constructor (cons
->expr
);
1379 if (cons
->expr
->expr_type
== EXPR_NULL
1380 && !(comp
->attr
.pointer
|| comp
->attr
.allocatable
1381 || comp
->attr
.proc_pointer
|| comp
->ts
.f90_type
== BT_VOID
1382 || (comp
->ts
.type
== BT_CLASS
1383 && (CLASS_DATA (comp
)->attr
.class_pointer
1384 || CLASS_DATA (comp
)->attr
.allocatable
))))
1387 gfc_error ("The NULL in the structure constructor at %L is "
1388 "being applied to component %qs, which is neither "
1389 "a POINTER nor ALLOCATABLE", &cons
->expr
->where
,
1393 if (comp
->attr
.proc_pointer
&& comp
->ts
.interface
)
1395 /* Check procedure pointer interface. */
1396 gfc_symbol
*s2
= NULL
;
1401 c2
= gfc_get_proc_ptr_comp (cons
->expr
);
1404 s2
= c2
->ts
.interface
;
1407 else if (cons
->expr
->expr_type
== EXPR_FUNCTION
)
1409 s2
= cons
->expr
->symtree
->n
.sym
->result
;
1410 name
= cons
->expr
->symtree
->n
.sym
->result
->name
;
1412 else if (cons
->expr
->expr_type
!= EXPR_NULL
)
1414 s2
= cons
->expr
->symtree
->n
.sym
;
1415 name
= cons
->expr
->symtree
->n
.sym
->name
;
1418 if (s2
&& !gfc_compare_interfaces (comp
->ts
.interface
, s2
, name
, 0, 1,
1419 err
, sizeof (err
), NULL
, NULL
))
1421 gfc_error_opt (OPT_Wargument_mismatch
,
1422 "Interface mismatch for procedure-pointer "
1423 "component %qs in structure constructor at %L:"
1424 " %s", comp
->name
, &cons
->expr
->where
, err
);
1429 if (!comp
->attr
.pointer
|| comp
->attr
.proc_pointer
1430 || cons
->expr
->expr_type
== EXPR_NULL
)
1433 a
= gfc_expr_attr (cons
->expr
);
1435 if (!a
.pointer
&& !a
.target
)
1438 gfc_error ("The element in the structure constructor at %L, "
1439 "for pointer component %qs should be a POINTER or "
1440 "a TARGET", &cons
->expr
->where
, comp
->name
);
1445 /* F08:C461. Additional checks for pointer initialization. */
1449 gfc_error ("Pointer initialization target at %L "
1450 "must not be ALLOCATABLE", &cons
->expr
->where
);
1455 gfc_error ("Pointer initialization target at %L "
1456 "must have the SAVE attribute", &cons
->expr
->where
);
1460 /* F2003, C1272 (3). */
1461 bool impure
= cons
->expr
->expr_type
== EXPR_VARIABLE
1462 && (gfc_impure_variable (cons
->expr
->symtree
->n
.sym
)
1463 || gfc_is_coindexed (cons
->expr
));
1464 if (impure
&& gfc_pure (NULL
))
1467 gfc_error ("Invalid expression in the structure constructor for "
1468 "pointer component %qs at %L in PURE procedure",
1469 comp
->name
, &cons
->expr
->where
);
1473 gfc_unset_implicit_pure (NULL
);
1480 /****************** Expression name resolution ******************/
1482 /* Returns 0 if a symbol was not declared with a type or
1483 attribute declaration statement, nonzero otherwise. */
1486 was_declared (gfc_symbol
*sym
)
1492 if (!a
.implicit_type
&& sym
->ts
.type
!= BT_UNKNOWN
)
1495 if (a
.allocatable
|| a
.dimension
|| a
.dummy
|| a
.external
|| a
.intrinsic
1496 || a
.optional
|| a
.pointer
|| a
.save
|| a
.target
|| a
.volatile_
1497 || a
.value
|| a
.access
!= ACCESS_UNKNOWN
|| a
.intent
!= INTENT_UNKNOWN
1498 || a
.asynchronous
|| a
.codimension
)
1505 /* Determine if a symbol is generic or not. */
1508 generic_sym (gfc_symbol
*sym
)
1512 if (sym
->attr
.generic
||
1513 (sym
->attr
.intrinsic
&& gfc_generic_intrinsic (sym
->name
)))
1516 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1519 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1526 return generic_sym (s
);
1533 /* Determine if a symbol is specific or not. */
1536 specific_sym (gfc_symbol
*sym
)
1540 if (sym
->attr
.if_source
== IFSRC_IFBODY
1541 || sym
->attr
.proc
== PROC_MODULE
1542 || sym
->attr
.proc
== PROC_INTERNAL
1543 || sym
->attr
.proc
== PROC_ST_FUNCTION
1544 || (sym
->attr
.intrinsic
&& gfc_specific_intrinsic (sym
->name
))
1545 || sym
->attr
.external
)
1548 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1551 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1553 return (s
== NULL
) ? 0 : specific_sym (s
);
1557 /* Figure out if the procedure is specific, generic or unknown. */
1560 { PTYPE_GENERIC
= 1, PTYPE_SPECIFIC
, PTYPE_UNKNOWN
};
1563 procedure_kind (gfc_symbol
*sym
)
1565 if (generic_sym (sym
))
1566 return PTYPE_GENERIC
;
1568 if (specific_sym (sym
))
1569 return PTYPE_SPECIFIC
;
1571 return PTYPE_UNKNOWN
;
1574 /* Check references to assumed size arrays. The flag need_full_assumed_size
1575 is nonzero when matching actual arguments. */
1577 static int need_full_assumed_size
= 0;
1580 check_assumed_size_reference (gfc_symbol
*sym
, gfc_expr
*e
)
1582 if (need_full_assumed_size
|| !(sym
->as
&& sym
->as
->type
== AS_ASSUMED_SIZE
))
1585 /* FIXME: The comparison "e->ref->u.ar.type == AR_FULL" is wrong.
1586 What should it be? */
1587 if (e
->ref
&& (e
->ref
->u
.ar
.end
[e
->ref
->u
.ar
.as
->rank
- 1] == NULL
)
1588 && (e
->ref
->u
.ar
.as
->type
== AS_ASSUMED_SIZE
)
1589 && (e
->ref
->u
.ar
.type
== AR_FULL
))
1591 gfc_error ("The upper bound in the last dimension must "
1592 "appear in the reference to the assumed size "
1593 "array %qs at %L", sym
->name
, &e
->where
);
1600 /* Look for bad assumed size array references in argument expressions
1601 of elemental and array valued intrinsic procedures. Since this is
1602 called from procedure resolution functions, it only recurses at
1606 resolve_assumed_size_actual (gfc_expr
*e
)
1611 switch (e
->expr_type
)
1614 if (e
->symtree
&& check_assumed_size_reference (e
->symtree
->n
.sym
, e
))
1619 if (resolve_assumed_size_actual (e
->value
.op
.op1
)
1620 || resolve_assumed_size_actual (e
->value
.op
.op2
))
1631 /* Check a generic procedure, passed as an actual argument, to see if
1632 there is a matching specific name. If none, it is an error, and if
1633 more than one, the reference is ambiguous. */
1635 count_specific_procs (gfc_expr
*e
)
1642 sym
= e
->symtree
->n
.sym
;
1644 for (p
= sym
->generic
; p
; p
= p
->next
)
1645 if (strcmp (sym
->name
, p
->sym
->name
) == 0)
1647 e
->symtree
= gfc_find_symtree (p
->sym
->ns
->sym_root
,
1653 gfc_error ("%qs at %L is ambiguous", e
->symtree
->n
.sym
->name
,
1657 gfc_error ("GENERIC procedure %qs is not allowed as an actual "
1658 "argument at %L", sym
->name
, &e
->where
);
1664 /* See if a call to sym could possibly be a not allowed RECURSION because of
1665 a missing RECURSIVE declaration. This means that either sym is the current
1666 context itself, or sym is the parent of a contained procedure calling its
1667 non-RECURSIVE containing procedure.
1668 This also works if sym is an ENTRY. */
1671 is_illegal_recursion (gfc_symbol
* sym
, gfc_namespace
* context
)
1673 gfc_symbol
* proc_sym
;
1674 gfc_symbol
* context_proc
;
1675 gfc_namespace
* real_context
;
1677 if (sym
->attr
.flavor
== FL_PROGRAM
1678 || gfc_fl_struct (sym
->attr
.flavor
))
1681 gcc_assert (sym
->attr
.flavor
== FL_PROCEDURE
);
1683 /* If we've got an ENTRY, find real procedure. */
1684 if (sym
->attr
.entry
&& sym
->ns
->entries
)
1685 proc_sym
= sym
->ns
->entries
->sym
;
1689 /* If sym is RECURSIVE, all is well of course. */
1690 if (proc_sym
->attr
.recursive
|| flag_recursive
)
1693 /* Find the context procedure's "real" symbol if it has entries.
1694 We look for a procedure symbol, so recurse on the parents if we don't
1695 find one (like in case of a BLOCK construct). */
1696 for (real_context
= context
; ; real_context
= real_context
->parent
)
1698 /* We should find something, eventually! */
1699 gcc_assert (real_context
);
1701 context_proc
= (real_context
->entries
? real_context
->entries
->sym
1702 : real_context
->proc_name
);
1704 /* In some special cases, there may not be a proc_name, like for this
1706 real(bad_kind()) function foo () ...
1707 when checking the call to bad_kind ().
1708 In these cases, we simply return here and assume that the
1713 if (context_proc
->attr
.flavor
!= FL_LABEL
)
1717 /* A call from sym's body to itself is recursion, of course. */
1718 if (context_proc
== proc_sym
)
1721 /* The same is true if context is a contained procedure and sym the
1723 if (context_proc
->attr
.contained
)
1725 gfc_symbol
* parent_proc
;
1727 gcc_assert (context
->parent
);
1728 parent_proc
= (context
->parent
->entries
? context
->parent
->entries
->sym
1729 : context
->parent
->proc_name
);
1731 if (parent_proc
== proc_sym
)
1739 /* Resolve an intrinsic procedure: Set its function/subroutine attribute,
1740 its typespec and formal argument list. */
1743 gfc_resolve_intrinsic (gfc_symbol
*sym
, locus
*loc
)
1745 gfc_intrinsic_sym
* isym
= NULL
;
1751 /* Already resolved. */
1752 if (sym
->from_intmod
&& sym
->ts
.type
!= BT_UNKNOWN
)
1755 /* We already know this one is an intrinsic, so we don't call
1756 gfc_is_intrinsic for full checking but rather use gfc_find_function and
1757 gfc_find_subroutine directly to check whether it is a function or
1760 if (sym
->intmod_sym_id
&& sym
->attr
.subroutine
)
1762 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1763 isym
= gfc_intrinsic_subroutine_by_id (id
);
1765 else if (sym
->intmod_sym_id
)
1767 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1768 isym
= gfc_intrinsic_function_by_id (id
);
1770 else if (!sym
->attr
.subroutine
)
1771 isym
= gfc_find_function (sym
->name
);
1773 if (isym
&& !sym
->attr
.subroutine
)
1775 if (sym
->ts
.type
!= BT_UNKNOWN
&& warn_surprising
1776 && !sym
->attr
.implicit_type
)
1777 gfc_warning (OPT_Wsurprising
,
1778 "Type specified for intrinsic function %qs at %L is"
1779 " ignored", sym
->name
, &sym
->declared_at
);
1781 if (!sym
->attr
.function
&&
1782 !gfc_add_function(&sym
->attr
, sym
->name
, loc
))
1787 else if (isym
|| (isym
= gfc_find_subroutine (sym
->name
)))
1789 if (sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.implicit_type
)
1791 gfc_error ("Intrinsic subroutine %qs at %L shall not have a type"
1792 " specifier", sym
->name
, &sym
->declared_at
);
1796 if (!sym
->attr
.subroutine
&&
1797 !gfc_add_subroutine(&sym
->attr
, sym
->name
, loc
))
1802 gfc_error ("%qs declared INTRINSIC at %L does not exist", sym
->name
,
1807 gfc_copy_formal_args_intr (sym
, isym
, NULL
);
1809 sym
->attr
.pure
= isym
->pure
;
1810 sym
->attr
.elemental
= isym
->elemental
;
1812 /* Check it is actually available in the standard settings. */
1813 if (!gfc_check_intrinsic_standard (isym
, &symstd
, false, sym
->declared_at
))
1815 gfc_error ("The intrinsic %qs declared INTRINSIC at %L is not "
1816 "available in the current standard settings but %s. Use "
1817 "an appropriate %<-std=*%> option or enable "
1818 "%<-fall-intrinsics%> in order to use it.",
1819 sym
->name
, &sym
->declared_at
, symstd
);
1827 /* Resolve a procedure expression, like passing it to a called procedure or as
1828 RHS for a procedure pointer assignment. */
1831 resolve_procedure_expression (gfc_expr
* expr
)
1835 if (expr
->expr_type
!= EXPR_VARIABLE
)
1837 gcc_assert (expr
->symtree
);
1839 sym
= expr
->symtree
->n
.sym
;
1841 if (sym
->attr
.intrinsic
)
1842 gfc_resolve_intrinsic (sym
, &expr
->where
);
1844 if (sym
->attr
.flavor
!= FL_PROCEDURE
1845 || (sym
->attr
.function
&& sym
->result
== sym
))
1848 /* A non-RECURSIVE procedure that is used as procedure expression within its
1849 own body is in danger of being called recursively. */
1850 if (is_illegal_recursion (sym
, gfc_current_ns
))
1851 gfc_warning (0, "Non-RECURSIVE procedure %qs at %L is possibly calling"
1852 " itself recursively. Declare it RECURSIVE or use"
1853 " %<-frecursive%>", sym
->name
, &expr
->where
);
1859 /* Resolve an actual argument list. Most of the time, this is just
1860 resolving the expressions in the list.
1861 The exception is that we sometimes have to decide whether arguments
1862 that look like procedure arguments are really simple variable
1866 resolve_actual_arglist (gfc_actual_arglist
*arg
, procedure_type ptype
,
1867 bool no_formal_args
)
1870 gfc_symtree
*parent_st
;
1872 gfc_component
*comp
;
1873 int save_need_full_assumed_size
;
1874 bool return_value
= false;
1875 bool actual_arg_sav
= actual_arg
, first_actual_arg_sav
= first_actual_arg
;
1878 first_actual_arg
= true;
1880 for (; arg
; arg
= arg
->next
)
1885 /* Check the label is a valid branching target. */
1888 if (arg
->label
->defined
== ST_LABEL_UNKNOWN
)
1890 gfc_error ("Label %d referenced at %L is never defined",
1891 arg
->label
->value
, &arg
->label
->where
);
1895 first_actual_arg
= false;
1899 if (e
->expr_type
== EXPR_VARIABLE
1900 && e
->symtree
->n
.sym
->attr
.generic
1902 && count_specific_procs (e
) != 1)
1905 if (e
->ts
.type
!= BT_PROCEDURE
)
1907 save_need_full_assumed_size
= need_full_assumed_size
;
1908 if (e
->expr_type
!= EXPR_VARIABLE
)
1909 need_full_assumed_size
= 0;
1910 if (!gfc_resolve_expr (e
))
1912 need_full_assumed_size
= save_need_full_assumed_size
;
1916 /* See if the expression node should really be a variable reference. */
1918 sym
= e
->symtree
->n
.sym
;
1920 if (sym
->attr
.flavor
== FL_PROCEDURE
1921 || sym
->attr
.intrinsic
1922 || sym
->attr
.external
)
1926 /* If a procedure is not already determined to be something else
1927 check if it is intrinsic. */
1928 if (gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, e
->where
))
1929 sym
->attr
.intrinsic
= 1;
1931 if (sym
->attr
.proc
== PROC_ST_FUNCTION
)
1933 gfc_error ("Statement function %qs at %L is not allowed as an "
1934 "actual argument", sym
->name
, &e
->where
);
1937 actual_ok
= gfc_intrinsic_actual_ok (sym
->name
,
1938 sym
->attr
.subroutine
);
1939 if (sym
->attr
.intrinsic
&& actual_ok
== 0)
1941 gfc_error ("Intrinsic %qs at %L is not allowed as an "
1942 "actual argument", sym
->name
, &e
->where
);
1945 if (sym
->attr
.contained
&& !sym
->attr
.use_assoc
1946 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
1948 if (!gfc_notify_std (GFC_STD_F2008
, "Internal procedure %qs is"
1949 " used as actual argument at %L",
1950 sym
->name
, &e
->where
))
1954 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
)
1956 gfc_error ("ELEMENTAL non-INTRINSIC procedure %qs is not "
1957 "allowed as an actual argument at %L", sym
->name
,
1961 /* Check if a generic interface has a specific procedure
1962 with the same name before emitting an error. */
1963 if (sym
->attr
.generic
&& count_specific_procs (e
) != 1)
1966 /* Just in case a specific was found for the expression. */
1967 sym
= e
->symtree
->n
.sym
;
1969 /* If the symbol is the function that names the current (or
1970 parent) scope, then we really have a variable reference. */
1972 if (gfc_is_function_return_value (sym
, sym
->ns
))
1975 /* If all else fails, see if we have a specific intrinsic. */
1976 if (sym
->ts
.type
== BT_UNKNOWN
&& sym
->attr
.intrinsic
)
1978 gfc_intrinsic_sym
*isym
;
1980 isym
= gfc_find_function (sym
->name
);
1981 if (isym
== NULL
|| !isym
->specific
)
1983 gfc_error ("Unable to find a specific INTRINSIC procedure "
1984 "for the reference %qs at %L", sym
->name
,
1989 sym
->attr
.intrinsic
= 1;
1990 sym
->attr
.function
= 1;
1993 if (!gfc_resolve_expr (e
))
1998 /* See if the name is a module procedure in a parent unit. */
2000 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
2003 if (gfc_find_sym_tree (sym
->name
, sym
->ns
->parent
, 1, &parent_st
))
2005 gfc_error ("Symbol %qs at %L is ambiguous", sym
->name
, &e
->where
);
2009 if (parent_st
== NULL
)
2012 sym
= parent_st
->n
.sym
;
2013 e
->symtree
= parent_st
; /* Point to the right thing. */
2015 if (sym
->attr
.flavor
== FL_PROCEDURE
2016 || sym
->attr
.intrinsic
2017 || sym
->attr
.external
)
2019 if (!gfc_resolve_expr (e
))
2025 e
->expr_type
= EXPR_VARIABLE
;
2027 if ((sym
->as
!= NULL
&& sym
->ts
.type
!= BT_CLASS
)
2028 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
2029 && CLASS_DATA (sym
)->as
))
2031 e
->rank
= sym
->ts
.type
== BT_CLASS
2032 ? CLASS_DATA (sym
)->as
->rank
: sym
->as
->rank
;
2033 e
->ref
= gfc_get_ref ();
2034 e
->ref
->type
= REF_ARRAY
;
2035 e
->ref
->u
.ar
.type
= AR_FULL
;
2036 e
->ref
->u
.ar
.as
= sym
->ts
.type
== BT_CLASS
2037 ? CLASS_DATA (sym
)->as
: sym
->as
;
2040 /* Expressions are assigned a default ts.type of BT_PROCEDURE in
2041 primary.c (match_actual_arg). If above code determines that it
2042 is a variable instead, it needs to be resolved as it was not
2043 done at the beginning of this function. */
2044 save_need_full_assumed_size
= need_full_assumed_size
;
2045 if (e
->expr_type
!= EXPR_VARIABLE
)
2046 need_full_assumed_size
= 0;
2047 if (!gfc_resolve_expr (e
))
2049 need_full_assumed_size
= save_need_full_assumed_size
;
2052 /* Check argument list functions %VAL, %LOC and %REF. There is
2053 nothing to do for %REF. */
2054 if (arg
->name
&& arg
->name
[0] == '%')
2056 if (strncmp ("%VAL", arg
->name
, 4) == 0)
2058 if (e
->ts
.type
== BT_CHARACTER
|| e
->ts
.type
== BT_DERIVED
)
2060 gfc_error ("By-value argument at %L is not of numeric "
2067 gfc_error ("By-value argument at %L cannot be an array or "
2068 "an array section", &e
->where
);
2072 /* Intrinsics are still PROC_UNKNOWN here. However,
2073 since same file external procedures are not resolvable
2074 in gfortran, it is a good deal easier to leave them to
2076 if (ptype
!= PROC_UNKNOWN
2077 && ptype
!= PROC_DUMMY
2078 && ptype
!= PROC_EXTERNAL
2079 && ptype
!= PROC_MODULE
)
2081 gfc_error ("By-value argument at %L is not allowed "
2082 "in this context", &e
->where
);
2087 /* Statement functions have already been excluded above. */
2088 else if (strncmp ("%LOC", arg
->name
, 4) == 0
2089 && e
->ts
.type
== BT_PROCEDURE
)
2091 if (e
->symtree
->n
.sym
->attr
.proc
== PROC_INTERNAL
)
2093 gfc_error ("Passing internal procedure at %L by location "
2094 "not allowed", &e
->where
);
2100 comp
= gfc_get_proc_ptr_comp(e
);
2101 if (e
->expr_type
== EXPR_VARIABLE
2102 && comp
&& comp
->attr
.elemental
)
2104 gfc_error ("ELEMENTAL procedure pointer component %qs is not "
2105 "allowed as an actual argument at %L", comp
->name
,
2109 /* Fortran 2008, C1237. */
2110 if (e
->expr_type
== EXPR_VARIABLE
&& gfc_is_coindexed (e
)
2111 && gfc_has_ultimate_pointer (e
))
2113 gfc_error ("Coindexed actual argument at %L with ultimate pointer "
2114 "component", &e
->where
);
2118 first_actual_arg
= false;
2121 return_value
= true;
2124 actual_arg
= actual_arg_sav
;
2125 first_actual_arg
= first_actual_arg_sav
;
2127 return return_value
;
2131 /* Do the checks of the actual argument list that are specific to elemental
2132 procedures. If called with c == NULL, we have a function, otherwise if
2133 expr == NULL, we have a subroutine. */
2136 resolve_elemental_actual (gfc_expr
*expr
, gfc_code
*c
)
2138 gfc_actual_arglist
*arg0
;
2139 gfc_actual_arglist
*arg
;
2140 gfc_symbol
*esym
= NULL
;
2141 gfc_intrinsic_sym
*isym
= NULL
;
2143 gfc_intrinsic_arg
*iformal
= NULL
;
2144 gfc_formal_arglist
*eformal
= NULL
;
2145 bool formal_optional
= false;
2146 bool set_by_optional
= false;
2150 /* Is this an elemental procedure? */
2151 if (expr
&& expr
->value
.function
.actual
!= NULL
)
2153 if (expr
->value
.function
.esym
!= NULL
2154 && expr
->value
.function
.esym
->attr
.elemental
)
2156 arg0
= expr
->value
.function
.actual
;
2157 esym
= expr
->value
.function
.esym
;
2159 else if (expr
->value
.function
.isym
!= NULL
2160 && expr
->value
.function
.isym
->elemental
)
2162 arg0
= expr
->value
.function
.actual
;
2163 isym
= expr
->value
.function
.isym
;
2168 else if (c
&& c
->ext
.actual
!= NULL
)
2170 arg0
= c
->ext
.actual
;
2172 if (c
->resolved_sym
)
2173 esym
= c
->resolved_sym
;
2175 esym
= c
->symtree
->n
.sym
;
2178 if (!esym
->attr
.elemental
)
2184 /* The rank of an elemental is the rank of its array argument(s). */
2185 for (arg
= arg0
; arg
; arg
= arg
->next
)
2187 if (arg
->expr
!= NULL
&& arg
->expr
->rank
!= 0)
2189 rank
= arg
->expr
->rank
;
2190 if (arg
->expr
->expr_type
== EXPR_VARIABLE
2191 && arg
->expr
->symtree
->n
.sym
->attr
.optional
)
2192 set_by_optional
= true;
2194 /* Function specific; set the result rank and shape. */
2198 if (!expr
->shape
&& arg
->expr
->shape
)
2200 expr
->shape
= gfc_get_shape (rank
);
2201 for (i
= 0; i
< rank
; i
++)
2202 mpz_init_set (expr
->shape
[i
], arg
->expr
->shape
[i
]);
2209 /* If it is an array, it shall not be supplied as an actual argument
2210 to an elemental procedure unless an array of the same rank is supplied
2211 as an actual argument corresponding to a nonoptional dummy argument of
2212 that elemental procedure(12.4.1.5). */
2213 formal_optional
= false;
2215 iformal
= isym
->formal
;
2217 eformal
= esym
->formal
;
2219 for (arg
= arg0
; arg
; arg
= arg
->next
)
2223 if (eformal
->sym
&& eformal
->sym
->attr
.optional
)
2224 formal_optional
= true;
2225 eformal
= eformal
->next
;
2227 else if (isym
&& iformal
)
2229 if (iformal
->optional
)
2230 formal_optional
= true;
2231 iformal
= iformal
->next
;
2234 formal_optional
= true;
2236 if (pedantic
&& arg
->expr
!= NULL
2237 && arg
->expr
->expr_type
== EXPR_VARIABLE
2238 && arg
->expr
->symtree
->n
.sym
->attr
.optional
2241 && (set_by_optional
|| arg
->expr
->rank
!= rank
)
2242 && !(isym
&& isym
->id
== GFC_ISYM_CONVERSION
))
2244 gfc_warning (OPT_Wpedantic
,
2245 "%qs at %L is an array and OPTIONAL; IF IT IS "
2246 "MISSING, it cannot be the actual argument of an "
2247 "ELEMENTAL procedure unless there is a non-optional "
2248 "argument with the same rank (12.4.1.5)",
2249 arg
->expr
->symtree
->n
.sym
->name
, &arg
->expr
->where
);
2253 for (arg
= arg0
; arg
; arg
= arg
->next
)
2255 if (arg
->expr
== NULL
|| arg
->expr
->rank
== 0)
2258 /* Being elemental, the last upper bound of an assumed size array
2259 argument must be present. */
2260 if (resolve_assumed_size_actual (arg
->expr
))
2263 /* Elemental procedure's array actual arguments must conform. */
2266 if (!gfc_check_conformance (arg
->expr
, e
, "elemental procedure"))
2273 /* INTENT(OUT) is only allowed for subroutines; if any actual argument
2274 is an array, the intent inout/out variable needs to be also an array. */
2275 if (rank
> 0 && esym
&& expr
== NULL
)
2276 for (eformal
= esym
->formal
, arg
= arg0
; arg
&& eformal
;
2277 arg
= arg
->next
, eformal
= eformal
->next
)
2278 if ((eformal
->sym
->attr
.intent
== INTENT_OUT
2279 || eformal
->sym
->attr
.intent
== INTENT_INOUT
)
2280 && arg
->expr
&& arg
->expr
->rank
== 0)
2282 gfc_error ("Actual argument at %L for INTENT(%s) dummy %qs of "
2283 "ELEMENTAL subroutine %qs is a scalar, but another "
2284 "actual argument is an array", &arg
->expr
->where
,
2285 (eformal
->sym
->attr
.intent
== INTENT_OUT
) ? "OUT"
2286 : "INOUT", eformal
->sym
->name
, esym
->name
);
2293 /* This function does the checking of references to global procedures
2294 as defined in sections 18.1 and 14.1, respectively, of the Fortran
2295 77 and 95 standards. It checks for a gsymbol for the name, making
2296 one if it does not already exist. If it already exists, then the
2297 reference being resolved must correspond to the type of gsymbol.
2298 Otherwise, the new symbol is equipped with the attributes of the
2299 reference. The corresponding code that is called in creating
2300 global entities is parse.c.
2302 In addition, for all but -std=legacy, the gsymbols are used to
2303 check the interfaces of external procedures from the same file.
2304 The namespace of the gsymbol is resolved and then, once this is
2305 done the interface is checked. */
2309 not_in_recursive (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2311 if (!gsym_ns
->proc_name
->attr
.recursive
)
2314 if (sym
->ns
== gsym_ns
)
2317 if (sym
->ns
->parent
&& sym
->ns
->parent
== gsym_ns
)
2324 not_entry_self_reference (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2326 if (gsym_ns
->entries
)
2328 gfc_entry_list
*entry
= gsym_ns
->entries
;
2330 for (; entry
; entry
= entry
->next
)
2332 if (strcmp (sym
->name
, entry
->sym
->name
) == 0)
2334 if (strcmp (gsym_ns
->proc_name
->name
,
2335 sym
->ns
->proc_name
->name
) == 0)
2339 && strcmp (gsym_ns
->proc_name
->name
,
2340 sym
->ns
->parent
->proc_name
->name
) == 0)
2349 /* Check for the requirement of an explicit interface. F08:12.4.2.2. */
2352 gfc_explicit_interface_required (gfc_symbol
*sym
, char *errmsg
, int err_len
)
2354 gfc_formal_arglist
*arg
= gfc_sym_get_dummy_args (sym
);
2356 for ( ; arg
; arg
= arg
->next
)
2361 if (arg
->sym
->attr
.allocatable
) /* (2a) */
2363 strncpy (errmsg
, _("allocatable argument"), err_len
);
2366 else if (arg
->sym
->attr
.asynchronous
)
2368 strncpy (errmsg
, _("asynchronous argument"), err_len
);
2371 else if (arg
->sym
->attr
.optional
)
2373 strncpy (errmsg
, _("optional argument"), err_len
);
2376 else if (arg
->sym
->attr
.pointer
)
2378 strncpy (errmsg
, _("pointer argument"), err_len
);
2381 else if (arg
->sym
->attr
.target
)
2383 strncpy (errmsg
, _("target argument"), err_len
);
2386 else if (arg
->sym
->attr
.value
)
2388 strncpy (errmsg
, _("value argument"), err_len
);
2391 else if (arg
->sym
->attr
.volatile_
)
2393 strncpy (errmsg
, _("volatile argument"), err_len
);
2396 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_SHAPE
) /* (2b) */
2398 strncpy (errmsg
, _("assumed-shape argument"), err_len
);
2401 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_RANK
) /* TS 29113, 6.2. */
2403 strncpy (errmsg
, _("assumed-rank argument"), err_len
);
2406 else if (arg
->sym
->attr
.codimension
) /* (2c) */
2408 strncpy (errmsg
, _("coarray argument"), err_len
);
2411 else if (false) /* (2d) TODO: parametrized derived type */
2413 strncpy (errmsg
, _("parametrized derived type argument"), err_len
);
2416 else if (arg
->sym
->ts
.type
== BT_CLASS
) /* (2e) */
2418 strncpy (errmsg
, _("polymorphic argument"), err_len
);
2421 else if (arg
->sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
2423 strncpy (errmsg
, _("NO_ARG_CHECK attribute"), err_len
);
2426 else if (arg
->sym
->ts
.type
== BT_ASSUMED
)
2428 /* As assumed-type is unlimited polymorphic (cf. above).
2429 See also TS 29113, Note 6.1. */
2430 strncpy (errmsg
, _("assumed-type argument"), err_len
);
2435 if (sym
->attr
.function
)
2437 gfc_symbol
*res
= sym
->result
? sym
->result
: sym
;
2439 if (res
->attr
.dimension
) /* (3a) */
2441 strncpy (errmsg
, _("array result"), err_len
);
2444 else if (res
->attr
.pointer
|| res
->attr
.allocatable
) /* (3b) */
2446 strncpy (errmsg
, _("pointer or allocatable result"), err_len
);
2449 else if (res
->ts
.type
== BT_CHARACTER
&& res
->ts
.u
.cl
2450 && res
->ts
.u
.cl
->length
2451 && res
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
) /* (3c) */
2453 strncpy (errmsg
, _("result with non-constant character length"), err_len
);
2458 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
) /* (4) */
2460 strncpy (errmsg
, _("elemental procedure"), err_len
);
2463 else if (sym
->attr
.is_bind_c
) /* (5) */
2465 strncpy (errmsg
, _("bind(c) procedure"), err_len
);
2474 resolve_global_procedure (gfc_symbol
*sym
, locus
*where
,
2475 gfc_actual_arglist
**actual
, int sub
)
2479 enum gfc_symbol_type type
;
2482 type
= sub
? GSYM_SUBROUTINE
: GSYM_FUNCTION
;
2484 gsym
= gfc_get_gsymbol (sym
->binding_label
? sym
->binding_label
: sym
->name
);
2486 if ((gsym
->type
!= GSYM_UNKNOWN
&& gsym
->type
!= type
))
2487 gfc_global_used (gsym
, where
);
2489 if ((sym
->attr
.if_source
== IFSRC_UNKNOWN
2490 || sym
->attr
.if_source
== IFSRC_IFBODY
)
2491 && gsym
->type
!= GSYM_UNKNOWN
2492 && !gsym
->binding_label
2494 && gsym
->ns
->resolved
!= -1
2495 && gsym
->ns
->proc_name
2496 && not_in_recursive (sym
, gsym
->ns
)
2497 && not_entry_self_reference (sym
, gsym
->ns
))
2499 gfc_symbol
*def_sym
;
2501 /* Resolve the gsymbol namespace if needed. */
2502 if (!gsym
->ns
->resolved
)
2504 gfc_dt_list
*old_dt_list
;
2506 /* Stash away derived types so that the backend_decls do not
2508 old_dt_list
= gfc_derived_types
;
2509 gfc_derived_types
= NULL
;
2511 gfc_resolve (gsym
->ns
);
2513 /* Store the new derived types with the global namespace. */
2514 if (gfc_derived_types
)
2515 gsym
->ns
->derived_types
= gfc_derived_types
;
2517 /* Restore the derived types of this namespace. */
2518 gfc_derived_types
= old_dt_list
;
2521 /* Make sure that translation for the gsymbol occurs before
2522 the procedure currently being resolved. */
2523 ns
= gfc_global_ns_list
;
2524 for (; ns
&& ns
!= gsym
->ns
; ns
= ns
->sibling
)
2526 if (ns
->sibling
== gsym
->ns
)
2528 ns
->sibling
= gsym
->ns
->sibling
;
2529 gsym
->ns
->sibling
= gfc_global_ns_list
;
2530 gfc_global_ns_list
= gsym
->ns
;
2535 def_sym
= gsym
->ns
->proc_name
;
2537 /* This can happen if a binding name has been specified. */
2538 if (gsym
->binding_label
&& gsym
->sym_name
!= def_sym
->name
)
2539 gfc_find_symbol (gsym
->sym_name
, gsym
->ns
, 0, &def_sym
);
2541 if (def_sym
->attr
.entry_master
)
2543 gfc_entry_list
*entry
;
2544 for (entry
= gsym
->ns
->entries
; entry
; entry
= entry
->next
)
2545 if (strcmp (entry
->sym
->name
, sym
->name
) == 0)
2547 def_sym
= entry
->sym
;
2552 if (sym
->attr
.function
&& !gfc_compare_types (&sym
->ts
, &def_sym
->ts
))
2554 gfc_error ("Return type mismatch of function %qs at %L (%s/%s)",
2555 sym
->name
, &sym
->declared_at
, gfc_typename (&sym
->ts
),
2556 gfc_typename (&def_sym
->ts
));
2560 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
2561 && gfc_explicit_interface_required (def_sym
, reason
, sizeof(reason
)))
2563 gfc_error ("Explicit interface required for %qs at %L: %s",
2564 sym
->name
, &sym
->declared_at
, reason
);
2568 if (!pedantic
&& (gfc_option
.allow_std
& GFC_STD_GNU
))
2569 /* Turn erros into warnings with -std=gnu and -std=legacy. */
2570 gfc_errors_to_warnings (true);
2572 if (!gfc_compare_interfaces (sym
, def_sym
, sym
->name
, 0, 1,
2573 reason
, sizeof(reason
), NULL
, NULL
))
2575 gfc_error_opt (OPT_Wargument_mismatch
,
2576 "Interface mismatch in global procedure %qs at %L:"
2577 " %s", sym
->name
, &sym
->declared_at
, reason
);
2582 || ((gfc_option
.warn_std
& GFC_STD_LEGACY
)
2583 && !(gfc_option
.warn_std
& GFC_STD_GNU
)))
2584 gfc_errors_to_warnings (true);
2586 if (sym
->attr
.if_source
!= IFSRC_IFBODY
)
2587 gfc_procedure_use (def_sym
, actual
, where
);
2591 gfc_errors_to_warnings (false);
2593 if (gsym
->type
== GSYM_UNKNOWN
)
2596 gsym
->where
= *where
;
2603 /************* Function resolution *************/
2605 /* Resolve a function call known to be generic.
2606 Section 14.1.2.4.1. */
2609 resolve_generic_f0 (gfc_expr
*expr
, gfc_symbol
*sym
)
2613 if (sym
->attr
.generic
)
2615 s
= gfc_search_interface (sym
->generic
, 0, &expr
->value
.function
.actual
);
2618 expr
->value
.function
.name
= s
->name
;
2619 expr
->value
.function
.esym
= s
;
2621 if (s
->ts
.type
!= BT_UNKNOWN
)
2623 else if (s
->result
!= NULL
&& s
->result
->ts
.type
!= BT_UNKNOWN
)
2624 expr
->ts
= s
->result
->ts
;
2627 expr
->rank
= s
->as
->rank
;
2628 else if (s
->result
!= NULL
&& s
->result
->as
!= NULL
)
2629 expr
->rank
= s
->result
->as
->rank
;
2631 gfc_set_sym_referenced (expr
->value
.function
.esym
);
2636 /* TODO: Need to search for elemental references in generic
2640 if (sym
->attr
.intrinsic
)
2641 return gfc_intrinsic_func_interface (expr
, 0);
2648 resolve_generic_f (gfc_expr
*expr
)
2652 gfc_interface
*intr
= NULL
;
2654 sym
= expr
->symtree
->n
.sym
;
2658 m
= resolve_generic_f0 (expr
, sym
);
2661 else if (m
== MATCH_ERROR
)
2666 for (intr
= sym
->generic
; intr
; intr
= intr
->next
)
2667 if (gfc_fl_struct (intr
->sym
->attr
.flavor
))
2670 if (sym
->ns
->parent
== NULL
)
2672 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2676 if (!generic_sym (sym
))
2680 /* Last ditch attempt. See if the reference is to an intrinsic
2681 that possesses a matching interface. 14.1.2.4 */
2682 if (sym
&& !intr
&& !gfc_is_intrinsic (sym
, 0, expr
->where
))
2684 if (gfc_init_expr_flag
)
2685 gfc_error ("Function %qs in initialization expression at %L "
2686 "must be an intrinsic function",
2687 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2689 gfc_error ("There is no specific function for the generic %qs "
2690 "at %L", expr
->symtree
->n
.sym
->name
, &expr
->where
);
2696 if (!gfc_convert_to_structure_constructor (expr
, intr
->sym
, NULL
,
2699 if (!gfc_use_derived (expr
->ts
.u
.derived
))
2701 return resolve_structure_cons (expr
, 0);
2704 m
= gfc_intrinsic_func_interface (expr
, 0);
2709 gfc_error ("Generic function %qs at %L is not consistent with a "
2710 "specific intrinsic interface", expr
->symtree
->n
.sym
->name
,
2717 /* Resolve a function call known to be specific. */
2720 resolve_specific_f0 (gfc_symbol
*sym
, gfc_expr
*expr
)
2724 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
2726 if (sym
->attr
.dummy
)
2728 sym
->attr
.proc
= PROC_DUMMY
;
2732 sym
->attr
.proc
= PROC_EXTERNAL
;
2736 if (sym
->attr
.proc
== PROC_MODULE
2737 || sym
->attr
.proc
== PROC_ST_FUNCTION
2738 || sym
->attr
.proc
== PROC_INTERNAL
)
2741 if (sym
->attr
.intrinsic
)
2743 m
= gfc_intrinsic_func_interface (expr
, 1);
2747 gfc_error ("Function %qs at %L is INTRINSIC but is not compatible "
2748 "with an intrinsic", sym
->name
, &expr
->where
);
2756 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2759 expr
->ts
= sym
->result
->ts
;
2762 expr
->value
.function
.name
= sym
->name
;
2763 expr
->value
.function
.esym
= sym
;
2764 /* Prevent crash when sym->ts.u.derived->components is not set due to previous
2766 if (sym
->ts
.type
== BT_CLASS
&& !CLASS_DATA (sym
))
2768 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)
2769 expr
->rank
= CLASS_DATA (sym
)->as
->rank
;
2770 else if (sym
->as
!= NULL
)
2771 expr
->rank
= sym
->as
->rank
;
2778 resolve_specific_f (gfc_expr
*expr
)
2783 sym
= expr
->symtree
->n
.sym
;
2787 m
= resolve_specific_f0 (sym
, expr
);
2790 if (m
== MATCH_ERROR
)
2793 if (sym
->ns
->parent
== NULL
)
2796 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2802 gfc_error ("Unable to resolve the specific function %qs at %L",
2803 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2808 /* Recursively append candidate SYM to CANDIDATES. Store the number of
2809 candidates in CANDIDATES_LEN. */
2812 lookup_function_fuzzy_find_candidates (gfc_symtree
*sym
,
2814 size_t &candidates_len
)
2820 if ((sym
->n
.sym
->ts
.type
!= BT_UNKNOWN
|| sym
->n
.sym
->attr
.external
)
2821 && sym
->n
.sym
->attr
.flavor
== FL_PROCEDURE
)
2822 vec_push (candidates
, candidates_len
, sym
->name
);
2826 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2830 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2834 /* Lookup function FN fuzzily, taking names in SYMROOT into account. */
2837 gfc_lookup_function_fuzzy (const char *fn
, gfc_symtree
*symroot
)
2839 char **candidates
= NULL
;
2840 size_t candidates_len
= 0;
2841 lookup_function_fuzzy_find_candidates (symroot
, candidates
, candidates_len
);
2842 return gfc_closest_fuzzy_match (fn
, candidates
);
2846 /* Resolve a procedure call not known to be generic nor specific. */
2849 resolve_unknown_f (gfc_expr
*expr
)
2854 sym
= expr
->symtree
->n
.sym
;
2856 if (sym
->attr
.dummy
)
2858 sym
->attr
.proc
= PROC_DUMMY
;
2859 expr
->value
.function
.name
= sym
->name
;
2863 /* See if we have an intrinsic function reference. */
2865 if (gfc_is_intrinsic (sym
, 0, expr
->where
))
2867 if (gfc_intrinsic_func_interface (expr
, 1) == MATCH_YES
)
2872 /* The reference is to an external name. */
2874 sym
->attr
.proc
= PROC_EXTERNAL
;
2875 expr
->value
.function
.name
= sym
->name
;
2876 expr
->value
.function
.esym
= expr
->symtree
->n
.sym
;
2878 if (sym
->as
!= NULL
)
2879 expr
->rank
= sym
->as
->rank
;
2881 /* Type of the expression is either the type of the symbol or the
2882 default type of the symbol. */
2885 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2887 if (sym
->ts
.type
!= BT_UNKNOWN
)
2891 ts
= gfc_get_default_type (sym
->name
, sym
->ns
);
2893 if (ts
->type
== BT_UNKNOWN
)
2896 = gfc_lookup_function_fuzzy (sym
->name
, sym
->ns
->sym_root
);
2898 gfc_error ("Function %qs at %L has no IMPLICIT type"
2899 "; did you mean %qs?",
2900 sym
->name
, &expr
->where
, guessed
);
2902 gfc_error ("Function %qs at %L has no IMPLICIT type",
2903 sym
->name
, &expr
->where
);
2914 /* Return true, if the symbol is an external procedure. */
2916 is_external_proc (gfc_symbol
*sym
)
2918 if (!sym
->attr
.dummy
&& !sym
->attr
.contained
2919 && !gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, sym
->declared_at
)
2920 && sym
->attr
.proc
!= PROC_ST_FUNCTION
2921 && !sym
->attr
.proc_pointer
2922 && !sym
->attr
.use_assoc
2930 /* Figure out if a function reference is pure or not. Also set the name
2931 of the function for a potential error message. Return nonzero if the
2932 function is PURE, zero if not. */
2934 pure_stmt_function (gfc_expr
*, gfc_symbol
*);
2937 pure_function (gfc_expr
*e
, const char **name
)
2940 gfc_component
*comp
;
2944 if (e
->symtree
!= NULL
2945 && e
->symtree
->n
.sym
!= NULL
2946 && e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
2947 return pure_stmt_function (e
, e
->symtree
->n
.sym
);
2949 comp
= gfc_get_proc_ptr_comp (e
);
2952 pure
= gfc_pure (comp
->ts
.interface
);
2955 else if (e
->value
.function
.esym
)
2957 pure
= gfc_pure (e
->value
.function
.esym
);
2958 *name
= e
->value
.function
.esym
->name
;
2960 else if (e
->value
.function
.isym
)
2962 pure
= e
->value
.function
.isym
->pure
2963 || e
->value
.function
.isym
->elemental
;
2964 *name
= e
->value
.function
.isym
->name
;
2968 /* Implicit functions are not pure. */
2970 *name
= e
->value
.function
.name
;
2978 impure_stmt_fcn (gfc_expr
*e
, gfc_symbol
*sym
,
2979 int *f ATTRIBUTE_UNUSED
)
2983 /* Don't bother recursing into other statement functions
2984 since they will be checked individually for purity. */
2985 if (e
->expr_type
!= EXPR_FUNCTION
2987 || e
->symtree
->n
.sym
== sym
2988 || e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
2991 return pure_function (e
, &name
) ? false : true;
2996 pure_stmt_function (gfc_expr
*e
, gfc_symbol
*sym
)
2998 return gfc_traverse_expr (e
, sym
, impure_stmt_fcn
, 0) ? 0 : 1;
3002 /* Check if an impure function is allowed in the current context. */
3004 static bool check_pure_function (gfc_expr
*e
)
3006 const char *name
= NULL
;
3007 if (!pure_function (e
, &name
) && name
)
3011 gfc_error ("Reference to impure function %qs at %L inside a "
3012 "FORALL %s", name
, &e
->where
,
3013 forall_flag
== 2 ? "mask" : "block");
3016 else if (gfc_do_concurrent_flag
)
3018 gfc_error ("Reference to impure function %qs at %L inside a "
3019 "DO CONCURRENT %s", name
, &e
->where
,
3020 gfc_do_concurrent_flag
== 2 ? "mask" : "block");
3023 else if (gfc_pure (NULL
))
3025 gfc_error ("Reference to impure function %qs at %L "
3026 "within a PURE procedure", name
, &e
->where
);
3029 gfc_unset_implicit_pure (NULL
);
3035 /* Update current procedure's array_outer_dependency flag, considering
3036 a call to procedure SYM. */
3039 update_current_proc_array_outer_dependency (gfc_symbol
*sym
)
3041 /* Check to see if this is a sibling function that has not yet
3043 gfc_namespace
*sibling
= gfc_current_ns
->sibling
;
3044 for (; sibling
; sibling
= sibling
->sibling
)
3046 if (sibling
->proc_name
== sym
)
3048 gfc_resolve (sibling
);
3053 /* If SYM has references to outer arrays, so has the procedure calling
3054 SYM. If SYM is a procedure pointer, we can assume the worst. */
3055 if (sym
->attr
.array_outer_dependency
3056 || sym
->attr
.proc_pointer
)
3057 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3061 /* Resolve a function call, which means resolving the arguments, then figuring
3062 out which entity the name refers to. */
3065 resolve_function (gfc_expr
*expr
)
3067 gfc_actual_arglist
*arg
;
3071 procedure_type p
= PROC_INTRINSIC
;
3072 bool no_formal_args
;
3076 sym
= expr
->symtree
->n
.sym
;
3078 /* If this is a procedure pointer component, it has already been resolved. */
3079 if (gfc_is_proc_ptr_comp (expr
))
3082 /* Avoid re-resolving the arguments of caf_get, which can lead to inserting
3084 if (sym
&& sym
->attr
.intrinsic
3085 && (sym
->intmod_sym_id
== GFC_ISYM_CAF_GET
3086 || sym
->intmod_sym_id
== GFC_ISYM_CAF_SEND
))
3089 if (sym
&& sym
->attr
.intrinsic
3090 && !gfc_resolve_intrinsic (sym
, &expr
->where
))
3093 if (sym
&& (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.subroutine
))
3095 gfc_error ("%qs at %L is not a function", sym
->name
, &expr
->where
);
3099 /* If this ia a deferred TBP with an abstract interface (which may
3100 of course be referenced), expr->value.function.esym will be set. */
3101 if (sym
&& sym
->attr
.abstract
&& !expr
->value
.function
.esym
)
3103 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3104 sym
->name
, &expr
->where
);
3108 /* Switch off assumed size checking and do this again for certain kinds
3109 of procedure, once the procedure itself is resolved. */
3110 need_full_assumed_size
++;
3112 if (expr
->symtree
&& expr
->symtree
->n
.sym
)
3113 p
= expr
->symtree
->n
.sym
->attr
.proc
;
3115 if (expr
->value
.function
.isym
&& expr
->value
.function
.isym
->inquiry
)
3116 inquiry_argument
= true;
3117 no_formal_args
= sym
&& is_external_proc (sym
)
3118 && gfc_sym_get_dummy_args (sym
) == NULL
;
3120 if (!resolve_actual_arglist (expr
->value
.function
.actual
,
3123 inquiry_argument
= false;
3127 inquiry_argument
= false;
3129 /* Resume assumed_size checking. */
3130 need_full_assumed_size
--;
3132 /* If the procedure is external, check for usage. */
3133 if (sym
&& is_external_proc (sym
))
3134 resolve_global_procedure (sym
, &expr
->where
,
3135 &expr
->value
.function
.actual
, 0);
3137 if (sym
&& sym
->ts
.type
== BT_CHARACTER
3139 && sym
->ts
.u
.cl
->length
== NULL
3141 && !sym
->ts
.deferred
3142 && expr
->value
.function
.esym
== NULL
3143 && !sym
->attr
.contained
)
3145 /* Internal procedures are taken care of in resolve_contained_fntype. */
3146 gfc_error ("Function %qs is declared CHARACTER(*) and cannot "
3147 "be used at %L since it is not a dummy argument",
3148 sym
->name
, &expr
->where
);
3152 /* See if function is already resolved. */
3154 if (expr
->value
.function
.name
!= NULL
3155 || expr
->value
.function
.isym
!= NULL
)
3157 if (expr
->ts
.type
== BT_UNKNOWN
)
3163 /* Apply the rules of section 14.1.2. */
3165 switch (procedure_kind (sym
))
3168 t
= resolve_generic_f (expr
);
3171 case PTYPE_SPECIFIC
:
3172 t
= resolve_specific_f (expr
);
3176 t
= resolve_unknown_f (expr
);
3180 gfc_internal_error ("resolve_function(): bad function type");
3184 /* If the expression is still a function (it might have simplified),
3185 then we check to see if we are calling an elemental function. */
3187 if (expr
->expr_type
!= EXPR_FUNCTION
)
3190 temp
= need_full_assumed_size
;
3191 need_full_assumed_size
= 0;
3193 if (!resolve_elemental_actual (expr
, NULL
))
3196 if (omp_workshare_flag
3197 && expr
->value
.function
.esym
3198 && ! gfc_elemental (expr
->value
.function
.esym
))
3200 gfc_error ("User defined non-ELEMENTAL function %qs at %L not allowed "
3201 "in WORKSHARE construct", expr
->value
.function
.esym
->name
,
3206 #define GENERIC_ID expr->value.function.isym->id
3207 else if (expr
->value
.function
.actual
!= NULL
3208 && expr
->value
.function
.isym
!= NULL
3209 && GENERIC_ID
!= GFC_ISYM_LBOUND
3210 && GENERIC_ID
!= GFC_ISYM_LCOBOUND
3211 && GENERIC_ID
!= GFC_ISYM_UCOBOUND
3212 && GENERIC_ID
!= GFC_ISYM_LEN
3213 && GENERIC_ID
!= GFC_ISYM_LOC
3214 && GENERIC_ID
!= GFC_ISYM_C_LOC
3215 && GENERIC_ID
!= GFC_ISYM_PRESENT
)
3217 /* Array intrinsics must also have the last upper bound of an
3218 assumed size array argument. UBOUND and SIZE have to be
3219 excluded from the check if the second argument is anything
3222 for (arg
= expr
->value
.function
.actual
; arg
; arg
= arg
->next
)
3224 if ((GENERIC_ID
== GFC_ISYM_UBOUND
|| GENERIC_ID
== GFC_ISYM_SIZE
)
3225 && arg
== expr
->value
.function
.actual
3226 && arg
->next
!= NULL
&& arg
->next
->expr
)
3228 if (arg
->next
->expr
->expr_type
!= EXPR_CONSTANT
)
3231 if (arg
->next
->name
&& strncmp (arg
->next
->name
, "kind", 4) == 0)
3234 if ((int)mpz_get_si (arg
->next
->expr
->value
.integer
)
3239 if (arg
->expr
!= NULL
3240 && arg
->expr
->rank
> 0
3241 && resolve_assumed_size_actual (arg
->expr
))
3247 need_full_assumed_size
= temp
;
3249 if (!check_pure_function(expr
))
3252 /* Functions without the RECURSIVE attribution are not allowed to
3253 * call themselves. */
3254 if (expr
->value
.function
.esym
&& !expr
->value
.function
.esym
->attr
.recursive
)
3257 esym
= expr
->value
.function
.esym
;
3259 if (is_illegal_recursion (esym
, gfc_current_ns
))
3261 if (esym
->attr
.entry
&& esym
->ns
->entries
)
3262 gfc_error ("ENTRY %qs at %L cannot be called recursively, as"
3263 " function %qs is not RECURSIVE",
3264 esym
->name
, &expr
->where
, esym
->ns
->entries
->sym
->name
);
3266 gfc_error ("Function %qs at %L cannot be called recursively, as it"
3267 " is not RECURSIVE", esym
->name
, &expr
->where
);
3273 /* Character lengths of use associated functions may contains references to
3274 symbols not referenced from the current program unit otherwise. Make sure
3275 those symbols are marked as referenced. */
3277 if (expr
->ts
.type
== BT_CHARACTER
&& expr
->value
.function
.esym
3278 && expr
->value
.function
.esym
->attr
.use_assoc
)
3280 gfc_expr_set_symbols_referenced (expr
->ts
.u
.cl
->length
);
3283 /* Make sure that the expression has a typespec that works. */
3284 if (expr
->ts
.type
== BT_UNKNOWN
)
3286 if (expr
->symtree
->n
.sym
->result
3287 && expr
->symtree
->n
.sym
->result
->ts
.type
!= BT_UNKNOWN
3288 && !expr
->symtree
->n
.sym
->result
->attr
.proc_pointer
)
3289 expr
->ts
= expr
->symtree
->n
.sym
->result
->ts
;
3292 if (!expr
->ref
&& !expr
->value
.function
.isym
)
3294 if (expr
->value
.function
.esym
)
3295 update_current_proc_array_outer_dependency (expr
->value
.function
.esym
);
3297 update_current_proc_array_outer_dependency (sym
);
3300 /* typebound procedure: Assume the worst. */
3301 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3307 /************* Subroutine resolution *************/
3310 pure_subroutine (gfc_symbol
*sym
, const char *name
, locus
*loc
)
3317 gfc_error ("Subroutine call to %qs in FORALL block at %L is not PURE",
3321 else if (gfc_do_concurrent_flag
)
3323 gfc_error ("Subroutine call to %qs in DO CONCURRENT block at %L is not "
3327 else if (gfc_pure (NULL
))
3329 gfc_error ("Subroutine call to %qs at %L is not PURE", name
, loc
);
3333 gfc_unset_implicit_pure (NULL
);
3339 resolve_generic_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3343 if (sym
->attr
.generic
)
3345 s
= gfc_search_interface (sym
->generic
, 1, &c
->ext
.actual
);
3348 c
->resolved_sym
= s
;
3349 if (!pure_subroutine (s
, s
->name
, &c
->loc
))
3354 /* TODO: Need to search for elemental references in generic interface. */
3357 if (sym
->attr
.intrinsic
)
3358 return gfc_intrinsic_sub_interface (c
, 0);
3365 resolve_generic_s (gfc_code
*c
)
3370 sym
= c
->symtree
->n
.sym
;
3374 m
= resolve_generic_s0 (c
, sym
);
3377 else if (m
== MATCH_ERROR
)
3381 if (sym
->ns
->parent
== NULL
)
3383 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3387 if (!generic_sym (sym
))
3391 /* Last ditch attempt. See if the reference is to an intrinsic
3392 that possesses a matching interface. 14.1.2.4 */
3393 sym
= c
->symtree
->n
.sym
;
3395 if (!gfc_is_intrinsic (sym
, 1, c
->loc
))
3397 gfc_error ("There is no specific subroutine for the generic %qs at %L",
3398 sym
->name
, &c
->loc
);
3402 m
= gfc_intrinsic_sub_interface (c
, 0);
3406 gfc_error ("Generic subroutine %qs at %L is not consistent with an "
3407 "intrinsic subroutine interface", sym
->name
, &c
->loc
);
3413 /* Resolve a subroutine call known to be specific. */
3416 resolve_specific_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3420 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
3422 if (sym
->attr
.dummy
)
3424 sym
->attr
.proc
= PROC_DUMMY
;
3428 sym
->attr
.proc
= PROC_EXTERNAL
;
3432 if (sym
->attr
.proc
== PROC_MODULE
|| sym
->attr
.proc
== PROC_INTERNAL
)
3435 if (sym
->attr
.intrinsic
)
3437 m
= gfc_intrinsic_sub_interface (c
, 1);
3441 gfc_error ("Subroutine %qs at %L is INTRINSIC but is not compatible "
3442 "with an intrinsic", sym
->name
, &c
->loc
);
3450 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3452 c
->resolved_sym
= sym
;
3453 if (!pure_subroutine (sym
, sym
->name
, &c
->loc
))
3461 resolve_specific_s (gfc_code
*c
)
3466 sym
= c
->symtree
->n
.sym
;
3470 m
= resolve_specific_s0 (c
, sym
);
3473 if (m
== MATCH_ERROR
)
3476 if (sym
->ns
->parent
== NULL
)
3479 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3485 sym
= c
->symtree
->n
.sym
;
3486 gfc_error ("Unable to resolve the specific subroutine %qs at %L",
3487 sym
->name
, &c
->loc
);
3493 /* Resolve a subroutine call not known to be generic nor specific. */
3496 resolve_unknown_s (gfc_code
*c
)
3500 sym
= c
->symtree
->n
.sym
;
3502 if (sym
->attr
.dummy
)
3504 sym
->attr
.proc
= PROC_DUMMY
;
3508 /* See if we have an intrinsic function reference. */
3510 if (gfc_is_intrinsic (sym
, 1, c
->loc
))
3512 if (gfc_intrinsic_sub_interface (c
, 1) == MATCH_YES
)
3517 /* The reference is to an external name. */
3520 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3522 c
->resolved_sym
= sym
;
3524 return pure_subroutine (sym
, sym
->name
, &c
->loc
);
3528 /* Resolve a subroutine call. Although it was tempting to use the same code
3529 for functions, subroutines and functions are stored differently and this
3530 makes things awkward. */
3533 resolve_call (gfc_code
*c
)
3536 procedure_type ptype
= PROC_INTRINSIC
;
3537 gfc_symbol
*csym
, *sym
;
3538 bool no_formal_args
;
3540 csym
= c
->symtree
? c
->symtree
->n
.sym
: NULL
;
3542 if (csym
&& csym
->ts
.type
!= BT_UNKNOWN
)
3544 gfc_error ("%qs at %L has a type, which is not consistent with "
3545 "the CALL at %L", csym
->name
, &csym
->declared_at
, &c
->loc
);
3549 if (csym
&& gfc_current_ns
->parent
&& csym
->ns
!= gfc_current_ns
)
3552 gfc_find_sym_tree (c
->symtree
->name
, gfc_current_ns
, 1, &st
);
3553 sym
= st
? st
->n
.sym
: NULL
;
3554 if (sym
&& csym
!= sym
3555 && sym
->ns
== gfc_current_ns
3556 && sym
->attr
.flavor
== FL_PROCEDURE
3557 && sym
->attr
.contained
)
3560 if (csym
->attr
.generic
)
3561 c
->symtree
->n
.sym
= sym
;
3564 csym
= c
->symtree
->n
.sym
;
3568 /* If this ia a deferred TBP, c->expr1 will be set. */
3569 if (!c
->expr1
&& csym
)
3571 if (csym
->attr
.abstract
)
3573 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3574 csym
->name
, &c
->loc
);
3578 /* Subroutines without the RECURSIVE attribution are not allowed to
3580 if (is_illegal_recursion (csym
, gfc_current_ns
))
3582 if (csym
->attr
.entry
&& csym
->ns
->entries
)
3583 gfc_error ("ENTRY %qs at %L cannot be called recursively, "
3584 "as subroutine %qs is not RECURSIVE",
3585 csym
->name
, &c
->loc
, csym
->ns
->entries
->sym
->name
);
3587 gfc_error ("SUBROUTINE %qs at %L cannot be called recursively, "
3588 "as it is not RECURSIVE", csym
->name
, &c
->loc
);
3594 /* Switch off assumed size checking and do this again for certain kinds
3595 of procedure, once the procedure itself is resolved. */
3596 need_full_assumed_size
++;
3599 ptype
= csym
->attr
.proc
;
3601 no_formal_args
= csym
&& is_external_proc (csym
)
3602 && gfc_sym_get_dummy_args (csym
) == NULL
;
3603 if (!resolve_actual_arglist (c
->ext
.actual
, ptype
, no_formal_args
))
3606 /* Resume assumed_size checking. */
3607 need_full_assumed_size
--;
3609 /* If external, check for usage. */
3610 if (csym
&& is_external_proc (csym
))
3611 resolve_global_procedure (csym
, &c
->loc
, &c
->ext
.actual
, 1);
3614 if (c
->resolved_sym
== NULL
)
3616 c
->resolved_isym
= NULL
;
3617 switch (procedure_kind (csym
))
3620 t
= resolve_generic_s (c
);
3623 case PTYPE_SPECIFIC
:
3624 t
= resolve_specific_s (c
);
3628 t
= resolve_unknown_s (c
);
3632 gfc_internal_error ("resolve_subroutine(): bad function type");
3636 /* Some checks of elemental subroutine actual arguments. */
3637 if (!resolve_elemental_actual (NULL
, c
))
3641 update_current_proc_array_outer_dependency (csym
);
3643 /* Typebound procedure: Assume the worst. */
3644 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3650 /* Compare the shapes of two arrays that have non-NULL shapes. If both
3651 op1->shape and op2->shape are non-NULL return true if their shapes
3652 match. If both op1->shape and op2->shape are non-NULL return false
3653 if their shapes do not match. If either op1->shape or op2->shape is
3654 NULL, return true. */
3657 compare_shapes (gfc_expr
*op1
, gfc_expr
*op2
)
3664 if (op1
->shape
!= NULL
&& op2
->shape
!= NULL
)
3666 for (i
= 0; i
< op1
->rank
; i
++)
3668 if (mpz_cmp (op1
->shape
[i
], op2
->shape
[i
]) != 0)
3670 gfc_error ("Shapes for operands at %L and %L are not conformable",
3671 &op1
->where
, &op2
->where
);
3681 /* Convert a logical operator to the corresponding bitwise intrinsic call.
3682 For example A .AND. B becomes IAND(A, B). */
3684 logical_to_bitwise (gfc_expr
*e
)
3686 gfc_expr
*tmp
, *op1
, *op2
;
3688 gfc_actual_arglist
*args
= NULL
;
3690 gcc_assert (e
->expr_type
== EXPR_OP
);
3692 isym
= GFC_ISYM_NONE
;
3693 op1
= e
->value
.op
.op1
;
3694 op2
= e
->value
.op
.op2
;
3696 switch (e
->value
.op
.op
)
3699 isym
= GFC_ISYM_NOT
;
3702 isym
= GFC_ISYM_IAND
;
3705 isym
= GFC_ISYM_IOR
;
3707 case INTRINSIC_NEQV
:
3708 isym
= GFC_ISYM_IEOR
;
3711 /* "Bitwise eqv" is just the complement of NEQV === IEOR.
3712 Change the old expression to NEQV, which will get replaced by IEOR,
3713 and wrap it in NOT. */
3714 tmp
= gfc_copy_expr (e
);
3715 tmp
->value
.op
.op
= INTRINSIC_NEQV
;
3716 tmp
= logical_to_bitwise (tmp
);
3717 isym
= GFC_ISYM_NOT
;
3722 gfc_internal_error ("logical_to_bitwise(): Bad intrinsic");
3725 /* Inherit the original operation's operands as arguments. */
3726 args
= gfc_get_actual_arglist ();
3730 args
->next
= gfc_get_actual_arglist ();
3731 args
->next
->expr
= op2
;
3734 /* Convert the expression to a function call. */
3735 e
->expr_type
= EXPR_FUNCTION
;
3736 e
->value
.function
.actual
= args
;
3737 e
->value
.function
.isym
= gfc_intrinsic_function_by_id (isym
);
3738 e
->value
.function
.name
= e
->value
.function
.isym
->name
;
3739 e
->value
.function
.esym
= NULL
;
3741 /* Make up a pre-resolved function call symtree if we need to. */
3742 if (!e
->symtree
|| !e
->symtree
->n
.sym
)
3745 gfc_get_ha_sym_tree (e
->value
.function
.isym
->name
, &e
->symtree
);
3746 sym
= e
->symtree
->n
.sym
;
3748 sym
->attr
.flavor
= FL_PROCEDURE
;
3749 sym
->attr
.function
= 1;
3750 sym
->attr
.elemental
= 1;
3752 sym
->attr
.referenced
= 1;
3753 gfc_intrinsic_symbol (sym
);
3754 gfc_commit_symbol (sym
);
3757 args
->name
= e
->value
.function
.isym
->formal
->name
;
3758 if (e
->value
.function
.isym
->formal
->next
)
3759 args
->next
->name
= e
->value
.function
.isym
->formal
->next
->name
;
3764 /* Recursively append candidate UOP to CANDIDATES. Store the number of
3765 candidates in CANDIDATES_LEN. */
3767 lookup_uop_fuzzy_find_candidates (gfc_symtree
*uop
,
3769 size_t &candidates_len
)
3776 /* Not sure how to properly filter here. Use all for a start.
3777 n.uop.op is NULL for empty interface operators (is that legal?) disregard
3778 these as i suppose they don't make terribly sense. */
3780 if (uop
->n
.uop
->op
!= NULL
)
3781 vec_push (candidates
, candidates_len
, uop
->name
);
3785 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3789 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3792 /* Lookup user-operator OP fuzzily, taking names in UOP into account. */
3795 lookup_uop_fuzzy (const char *op
, gfc_symtree
*uop
)
3797 char **candidates
= NULL
;
3798 size_t candidates_len
= 0;
3799 lookup_uop_fuzzy_find_candidates (uop
, candidates
, candidates_len
);
3800 return gfc_closest_fuzzy_match (op
, candidates
);
3804 /* Resolve an operator expression node. This can involve replacing the
3805 operation with a user defined function call. */
3808 resolve_operator (gfc_expr
*e
)
3810 gfc_expr
*op1
, *op2
;
3812 bool dual_locus_error
;
3815 /* Resolve all subnodes-- give them types. */
3817 switch (e
->value
.op
.op
)
3820 if (!gfc_resolve_expr (e
->value
.op
.op2
))
3826 case INTRINSIC_UPLUS
:
3827 case INTRINSIC_UMINUS
:
3828 case INTRINSIC_PARENTHESES
:
3829 if (!gfc_resolve_expr (e
->value
.op
.op1
))
3834 /* Typecheck the new node. */
3836 op1
= e
->value
.op
.op1
;
3837 op2
= e
->value
.op
.op2
;
3838 dual_locus_error
= false;
3840 if ((op1
&& op1
->expr_type
== EXPR_NULL
)
3841 || (op2
&& op2
->expr_type
== EXPR_NULL
))
3843 sprintf (msg
, _("Invalid context for NULL() pointer at %%L"));
3847 switch (e
->value
.op
.op
)
3849 case INTRINSIC_UPLUS
:
3850 case INTRINSIC_UMINUS
:
3851 if (op1
->ts
.type
== BT_INTEGER
3852 || op1
->ts
.type
== BT_REAL
3853 || op1
->ts
.type
== BT_COMPLEX
)
3859 sprintf (msg
, _("Operand of unary numeric operator %%<%s%%> at %%L is %s"),
3860 gfc_op2string (e
->value
.op
.op
), gfc_typename (&e
->ts
));
3863 case INTRINSIC_PLUS
:
3864 case INTRINSIC_MINUS
:
3865 case INTRINSIC_TIMES
:
3866 case INTRINSIC_DIVIDE
:
3867 case INTRINSIC_POWER
:
3868 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
3870 gfc_type_convert_binary (e
, 1);
3875 _("Operands of binary numeric operator %%<%s%%> at %%L are %s/%s"),
3876 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
3877 gfc_typename (&op2
->ts
));
3880 case INTRINSIC_CONCAT
:
3881 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
3882 && op1
->ts
.kind
== op2
->ts
.kind
)
3884 e
->ts
.type
= BT_CHARACTER
;
3885 e
->ts
.kind
= op1
->ts
.kind
;
3890 _("Operands of string concatenation operator at %%L are %s/%s"),
3891 gfc_typename (&op1
->ts
), gfc_typename (&op2
->ts
));
3897 case INTRINSIC_NEQV
:
3898 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
3900 e
->ts
.type
= BT_LOGICAL
;
3901 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
3902 if (op1
->ts
.kind
< e
->ts
.kind
)
3903 gfc_convert_type (op1
, &e
->ts
, 2);
3904 else if (op2
->ts
.kind
< e
->ts
.kind
)
3905 gfc_convert_type (op2
, &e
->ts
, 2);
3909 /* Logical ops on integers become bitwise ops with -fdec. */
3911 && (op1
->ts
.type
== BT_INTEGER
|| op2
->ts
.type
== BT_INTEGER
))
3913 e
->ts
.type
= BT_INTEGER
;
3914 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
3915 if (op1
->ts
.type
!= e
->ts
.type
|| op1
->ts
.kind
!= e
->ts
.kind
)
3916 gfc_convert_type (op1
, &e
->ts
, 1);
3917 if (op2
->ts
.type
!= e
->ts
.type
|| op2
->ts
.kind
!= e
->ts
.kind
)
3918 gfc_convert_type (op2
, &e
->ts
, 1);
3919 e
= logical_to_bitwise (e
);
3920 return resolve_function (e
);
3923 sprintf (msg
, _("Operands of logical operator %%<%s%%> at %%L are %s/%s"),
3924 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
3925 gfc_typename (&op2
->ts
));
3930 /* Logical ops on integers become bitwise ops with -fdec. */
3931 if (flag_dec
&& op1
->ts
.type
== BT_INTEGER
)
3933 e
->ts
.type
= BT_INTEGER
;
3934 e
->ts
.kind
= op1
->ts
.kind
;
3935 e
= logical_to_bitwise (e
);
3936 return resolve_function (e
);
3939 if (op1
->ts
.type
== BT_LOGICAL
)
3941 e
->ts
.type
= BT_LOGICAL
;
3942 e
->ts
.kind
= op1
->ts
.kind
;
3946 sprintf (msg
, _("Operand of .not. operator at %%L is %s"),
3947 gfc_typename (&op1
->ts
));
3951 case INTRINSIC_GT_OS
:
3953 case INTRINSIC_GE_OS
:
3955 case INTRINSIC_LT_OS
:
3957 case INTRINSIC_LE_OS
:
3958 if (op1
->ts
.type
== BT_COMPLEX
|| op2
->ts
.type
== BT_COMPLEX
)
3960 strcpy (msg
, _("COMPLEX quantities cannot be compared at %L"));
3967 case INTRINSIC_EQ_OS
:
3969 case INTRINSIC_NE_OS
:
3970 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
3971 && op1
->ts
.kind
== op2
->ts
.kind
)
3973 e
->ts
.type
= BT_LOGICAL
;
3974 e
->ts
.kind
= gfc_default_logical_kind
;
3978 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
3980 gfc_type_convert_binary (e
, 1);
3982 e
->ts
.type
= BT_LOGICAL
;
3983 e
->ts
.kind
= gfc_default_logical_kind
;
3985 if (warn_compare_reals
)
3987 gfc_intrinsic_op op
= e
->value
.op
.op
;
3989 /* Type conversion has made sure that the types of op1 and op2
3990 agree, so it is only necessary to check the first one. */
3991 if ((op1
->ts
.type
== BT_REAL
|| op1
->ts
.type
== BT_COMPLEX
)
3992 && (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
3993 || op
== INTRINSIC_NE
|| op
== INTRINSIC_NE_OS
))
3997 if (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
)
3998 msg
= "Equality comparison for %s at %L";
4000 msg
= "Inequality comparison for %s at %L";
4002 gfc_warning (OPT_Wcompare_reals
, msg
,
4003 gfc_typename (&op1
->ts
), &op1
->where
);
4010 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
4012 _("Logicals at %%L must be compared with %s instead of %s"),
4013 (e
->value
.op
.op
== INTRINSIC_EQ
4014 || e
->value
.op
.op
== INTRINSIC_EQ_OS
)
4015 ? ".eqv." : ".neqv.", gfc_op2string (e
->value
.op
.op
));
4018 _("Operands of comparison operator %%<%s%%> at %%L are %s/%s"),
4019 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
4020 gfc_typename (&op2
->ts
));
4024 case INTRINSIC_USER
:
4025 if (e
->value
.op
.uop
->op
== NULL
)
4027 const char *name
= e
->value
.op
.uop
->name
;
4028 const char *guessed
;
4029 guessed
= lookup_uop_fuzzy (name
, e
->value
.op
.uop
->ns
->uop_root
);
4031 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L; did you mean '%s'?"),
4034 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L"), name
);
4036 else if (op2
== NULL
)
4037 sprintf (msg
, _("Operand of user operator %%<%s%%> at %%L is %s"),
4038 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
));
4041 sprintf (msg
, _("Operands of user operator %%<%s%%> at %%L are %s/%s"),
4042 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
),
4043 gfc_typename (&op2
->ts
));
4044 e
->value
.op
.uop
->op
->sym
->attr
.referenced
= 1;
4049 case INTRINSIC_PARENTHESES
:
4051 if (e
->ts
.type
== BT_CHARACTER
)
4052 e
->ts
.u
.cl
= op1
->ts
.u
.cl
;
4056 gfc_internal_error ("resolve_operator(): Bad intrinsic");
4059 /* Deal with arrayness of an operand through an operator. */
4063 switch (e
->value
.op
.op
)
4065 case INTRINSIC_PLUS
:
4066 case INTRINSIC_MINUS
:
4067 case INTRINSIC_TIMES
:
4068 case INTRINSIC_DIVIDE
:
4069 case INTRINSIC_POWER
:
4070 case INTRINSIC_CONCAT
:
4074 case INTRINSIC_NEQV
:
4076 case INTRINSIC_EQ_OS
:
4078 case INTRINSIC_NE_OS
:
4080 case INTRINSIC_GT_OS
:
4082 case INTRINSIC_GE_OS
:
4084 case INTRINSIC_LT_OS
:
4086 case INTRINSIC_LE_OS
:
4088 if (op1
->rank
== 0 && op2
->rank
== 0)
4091 if (op1
->rank
== 0 && op2
->rank
!= 0)
4093 e
->rank
= op2
->rank
;
4095 if (e
->shape
== NULL
)
4096 e
->shape
= gfc_copy_shape (op2
->shape
, op2
->rank
);
4099 if (op1
->rank
!= 0 && op2
->rank
== 0)
4101 e
->rank
= op1
->rank
;
4103 if (e
->shape
== NULL
)
4104 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4107 if (op1
->rank
!= 0 && op2
->rank
!= 0)
4109 if (op1
->rank
== op2
->rank
)
4111 e
->rank
= op1
->rank
;
4112 if (e
->shape
== NULL
)
4114 t
= compare_shapes (op1
, op2
);
4118 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4123 /* Allow higher level expressions to work. */
4126 /* Try user-defined operators, and otherwise throw an error. */
4127 dual_locus_error
= true;
4129 _("Inconsistent ranks for operator at %%L and %%L"));
4136 case INTRINSIC_PARENTHESES
:
4138 case INTRINSIC_UPLUS
:
4139 case INTRINSIC_UMINUS
:
4140 /* Simply copy arrayness attribute */
4141 e
->rank
= op1
->rank
;
4143 if (e
->shape
== NULL
)
4144 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4152 /* Attempt to simplify the expression. */
4155 t
= gfc_simplify_expr (e
, 0);
4156 /* Some calls do not succeed in simplification and return false
4157 even though there is no error; e.g. variable references to
4158 PARAMETER arrays. */
4159 if (!gfc_is_constant_expr (e
))
4167 match m
= gfc_extend_expr (e
);
4170 if (m
== MATCH_ERROR
)
4174 if (dual_locus_error
)
4175 gfc_error (msg
, &op1
->where
, &op2
->where
);
4177 gfc_error (msg
, &e
->where
);
4183 /************** Array resolution subroutines **************/
4186 { CMP_LT
, CMP_EQ
, CMP_GT
, CMP_UNKNOWN
};
4188 /* Compare two integer expressions. */
4190 static compare_result
4191 compare_bound (gfc_expr
*a
, gfc_expr
*b
)
4195 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
4196 || b
== NULL
|| b
->expr_type
!= EXPR_CONSTANT
)
4199 /* If either of the types isn't INTEGER, we must have
4200 raised an error earlier. */
4202 if (a
->ts
.type
!= BT_INTEGER
|| b
->ts
.type
!= BT_INTEGER
)
4205 i
= mpz_cmp (a
->value
.integer
, b
->value
.integer
);
4215 /* Compare an integer expression with an integer. */
4217 static compare_result
4218 compare_bound_int (gfc_expr
*a
, int b
)
4222 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4225 if (a
->ts
.type
!= BT_INTEGER
)
4226 gfc_internal_error ("compare_bound_int(): Bad expression");
4228 i
= mpz_cmp_si (a
->value
.integer
, b
);
4238 /* Compare an integer expression with a mpz_t. */
4240 static compare_result
4241 compare_bound_mpz_t (gfc_expr
*a
, mpz_t b
)
4245 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4248 if (a
->ts
.type
!= BT_INTEGER
)
4249 gfc_internal_error ("compare_bound_int(): Bad expression");
4251 i
= mpz_cmp (a
->value
.integer
, b
);
4261 /* Compute the last value of a sequence given by a triplet.
4262 Return 0 if it wasn't able to compute the last value, or if the
4263 sequence if empty, and 1 otherwise. */
4266 compute_last_value_for_triplet (gfc_expr
*start
, gfc_expr
*end
,
4267 gfc_expr
*stride
, mpz_t last
)
4271 if (start
== NULL
|| start
->expr_type
!= EXPR_CONSTANT
4272 || end
== NULL
|| end
->expr_type
!= EXPR_CONSTANT
4273 || (stride
!= NULL
&& stride
->expr_type
!= EXPR_CONSTANT
))
4276 if (start
->ts
.type
!= BT_INTEGER
|| end
->ts
.type
!= BT_INTEGER
4277 || (stride
!= NULL
&& stride
->ts
.type
!= BT_INTEGER
))
4280 if (stride
== NULL
|| compare_bound_int (stride
, 1) == CMP_EQ
)
4282 if (compare_bound (start
, end
) == CMP_GT
)
4284 mpz_set (last
, end
->value
.integer
);
4288 if (compare_bound_int (stride
, 0) == CMP_GT
)
4290 /* Stride is positive */
4291 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) > 0)
4296 /* Stride is negative */
4297 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) < 0)
4302 mpz_sub (rem
, end
->value
.integer
, start
->value
.integer
);
4303 mpz_tdiv_r (rem
, rem
, stride
->value
.integer
);
4304 mpz_sub (last
, end
->value
.integer
, rem
);
4311 /* Compare a single dimension of an array reference to the array
4315 check_dimension (int i
, gfc_array_ref
*ar
, gfc_array_spec
*as
)
4319 if (ar
->dimen_type
[i
] == DIMEN_STAR
)
4321 gcc_assert (ar
->stride
[i
] == NULL
);
4322 /* This implies [*] as [*:] and [*:3] are not possible. */
4323 if (ar
->start
[i
] == NULL
)
4325 gcc_assert (ar
->end
[i
] == NULL
);
4330 /* Given start, end and stride values, calculate the minimum and
4331 maximum referenced indexes. */
4333 switch (ar
->dimen_type
[i
])
4336 case DIMEN_THIS_IMAGE
:
4341 if (compare_bound (ar
->start
[i
], as
->lower
[i
]) == CMP_LT
)
4344 gfc_warning (0, "Array reference at %L is out of bounds "
4345 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4346 mpz_get_si (ar
->start
[i
]->value
.integer
),
4347 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4349 gfc_warning (0, "Array reference at %L is out of bounds "
4350 "(%ld < %ld) in codimension %d", &ar
->c_where
[i
],
4351 mpz_get_si (ar
->start
[i
]->value
.integer
),
4352 mpz_get_si (as
->lower
[i
]->value
.integer
),
4356 if (compare_bound (ar
->start
[i
], as
->upper
[i
]) == CMP_GT
)
4359 gfc_warning (0, "Array reference at %L is out of bounds "
4360 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4361 mpz_get_si (ar
->start
[i
]->value
.integer
),
4362 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4364 gfc_warning (0, "Array reference at %L is out of bounds "
4365 "(%ld > %ld) in codimension %d", &ar
->c_where
[i
],
4366 mpz_get_si (ar
->start
[i
]->value
.integer
),
4367 mpz_get_si (as
->upper
[i
]->value
.integer
),
4376 #define AR_START (ar->start[i] ? ar->start[i] : as->lower[i])
4377 #define AR_END (ar->end[i] ? ar->end[i] : as->upper[i])
4379 compare_result comp_start_end
= compare_bound (AR_START
, AR_END
);
4381 /* Check for zero stride, which is not allowed. */
4382 if (compare_bound_int (ar
->stride
[i
], 0) == CMP_EQ
)
4384 gfc_error ("Illegal stride of zero at %L", &ar
->c_where
[i
]);
4388 /* if start == len || (stride > 0 && start < len)
4389 || (stride < 0 && start > len),
4390 then the array section contains at least one element. In this
4391 case, there is an out-of-bounds access if
4392 (start < lower || start > upper). */
4393 if (compare_bound (AR_START
, AR_END
) == CMP_EQ
4394 || ((compare_bound_int (ar
->stride
[i
], 0) == CMP_GT
4395 || ar
->stride
[i
] == NULL
) && comp_start_end
== CMP_LT
)
4396 || (compare_bound_int (ar
->stride
[i
], 0) == CMP_LT
4397 && comp_start_end
== CMP_GT
))
4399 if (compare_bound (AR_START
, as
->lower
[i
]) == CMP_LT
)
4401 gfc_warning (0, "Lower array reference at %L is out of bounds "
4402 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4403 mpz_get_si (AR_START
->value
.integer
),
4404 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4407 if (compare_bound (AR_START
, as
->upper
[i
]) == CMP_GT
)
4409 gfc_warning (0, "Lower array reference at %L is out of bounds "
4410 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4411 mpz_get_si (AR_START
->value
.integer
),
4412 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4417 /* If we can compute the highest index of the array section,
4418 then it also has to be between lower and upper. */
4419 mpz_init (last_value
);
4420 if (compute_last_value_for_triplet (AR_START
, AR_END
, ar
->stride
[i
],
4423 if (compare_bound_mpz_t (as
->lower
[i
], last_value
) == CMP_GT
)
4425 gfc_warning (0, "Upper array reference at %L is out of bounds "
4426 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4427 mpz_get_si (last_value
),
4428 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4429 mpz_clear (last_value
);
4432 if (compare_bound_mpz_t (as
->upper
[i
], last_value
) == CMP_LT
)
4434 gfc_warning (0, "Upper array reference at %L is out of bounds "
4435 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4436 mpz_get_si (last_value
),
4437 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4438 mpz_clear (last_value
);
4442 mpz_clear (last_value
);
4450 gfc_internal_error ("check_dimension(): Bad array reference");
4457 /* Compare an array reference with an array specification. */
4460 compare_spec_to_ref (gfc_array_ref
*ar
)
4467 /* TODO: Full array sections are only allowed as actual parameters. */
4468 if (as
->type
== AS_ASSUMED_SIZE
4469 && (/*ar->type == AR_FULL
4470 ||*/ (ar
->type
== AR_SECTION
4471 && ar
->dimen_type
[i
] == DIMEN_RANGE
&& ar
->end
[i
] == NULL
)))
4473 gfc_error ("Rightmost upper bound of assumed size array section "
4474 "not specified at %L", &ar
->where
);
4478 if (ar
->type
== AR_FULL
)
4481 if (as
->rank
!= ar
->dimen
)
4483 gfc_error ("Rank mismatch in array reference at %L (%d/%d)",
4484 &ar
->where
, ar
->dimen
, as
->rank
);
4488 /* ar->codimen == 0 is a local array. */
4489 if (as
->corank
!= ar
->codimen
&& ar
->codimen
!= 0)
4491 gfc_error ("Coindex rank mismatch in array reference at %L (%d/%d)",
4492 &ar
->where
, ar
->codimen
, as
->corank
);
4496 for (i
= 0; i
< as
->rank
; i
++)
4497 if (!check_dimension (i
, ar
, as
))
4500 /* Local access has no coarray spec. */
4501 if (ar
->codimen
!= 0)
4502 for (i
= as
->rank
; i
< as
->rank
+ as
->corank
; i
++)
4504 if (ar
->dimen_type
[i
] != DIMEN_ELEMENT
&& !ar
->in_allocate
4505 && ar
->dimen_type
[i
] != DIMEN_THIS_IMAGE
)
4507 gfc_error ("Coindex of codimension %d must be a scalar at %L",
4508 i
+ 1 - as
->rank
, &ar
->where
);
4511 if (!check_dimension (i
, ar
, as
))
4519 /* Resolve one part of an array index. */
4522 gfc_resolve_index_1 (gfc_expr
*index
, int check_scalar
,
4523 int force_index_integer_kind
)
4530 if (!gfc_resolve_expr (index
))
4533 if (check_scalar
&& index
->rank
!= 0)
4535 gfc_error ("Array index at %L must be scalar", &index
->where
);
4539 if (index
->ts
.type
!= BT_INTEGER
&& index
->ts
.type
!= BT_REAL
)
4541 gfc_error ("Array index at %L must be of INTEGER type, found %s",
4542 &index
->where
, gfc_basic_typename (index
->ts
.type
));
4546 if (index
->ts
.type
== BT_REAL
)
4547 if (!gfc_notify_std (GFC_STD_LEGACY
, "REAL array index at %L",
4551 if ((index
->ts
.kind
!= gfc_index_integer_kind
4552 && force_index_integer_kind
)
4553 || index
->ts
.type
!= BT_INTEGER
)
4556 ts
.type
= BT_INTEGER
;
4557 ts
.kind
= gfc_index_integer_kind
;
4559 gfc_convert_type_warn (index
, &ts
, 2, 0);
4565 /* Resolve one part of an array index. */
4568 gfc_resolve_index (gfc_expr
*index
, int check_scalar
)
4570 return gfc_resolve_index_1 (index
, check_scalar
, 1);
4573 /* Resolve a dim argument to an intrinsic function. */
4576 gfc_resolve_dim_arg (gfc_expr
*dim
)
4581 if (!gfc_resolve_expr (dim
))
4586 gfc_error ("Argument dim at %L must be scalar", &dim
->where
);
4591 if (dim
->ts
.type
!= BT_INTEGER
)
4593 gfc_error ("Argument dim at %L must be of INTEGER type", &dim
->where
);
4597 if (dim
->ts
.kind
!= gfc_index_integer_kind
)
4602 ts
.type
= BT_INTEGER
;
4603 ts
.kind
= gfc_index_integer_kind
;
4605 gfc_convert_type_warn (dim
, &ts
, 2, 0);
4611 /* Given an expression that contains array references, update those array
4612 references to point to the right array specifications. While this is
4613 filled in during matching, this information is difficult to save and load
4614 in a module, so we take care of it here.
4616 The idea here is that the original array reference comes from the
4617 base symbol. We traverse the list of reference structures, setting
4618 the stored reference to references. Component references can
4619 provide an additional array specification. */
4622 find_array_spec (gfc_expr
*e
)
4628 if (e
->symtree
->n
.sym
->ts
.type
== BT_CLASS
)
4629 as
= CLASS_DATA (e
->symtree
->n
.sym
)->as
;
4631 as
= e
->symtree
->n
.sym
->as
;
4633 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4638 gfc_internal_error ("find_array_spec(): Missing spec");
4645 c
= ref
->u
.c
.component
;
4646 if (c
->attr
.dimension
)
4649 gfc_internal_error ("find_array_spec(): unused as(1)");
4660 gfc_internal_error ("find_array_spec(): unused as(2)");
4664 /* Resolve an array reference. */
4667 resolve_array_ref (gfc_array_ref
*ar
)
4669 int i
, check_scalar
;
4672 for (i
= 0; i
< ar
->dimen
+ ar
->codimen
; i
++)
4674 check_scalar
= ar
->dimen_type
[i
] == DIMEN_RANGE
;
4676 /* Do not force gfc_index_integer_kind for the start. We can
4677 do fine with any integer kind. This avoids temporary arrays
4678 created for indexing with a vector. */
4679 if (!gfc_resolve_index_1 (ar
->start
[i
], check_scalar
, 0))
4681 if (!gfc_resolve_index (ar
->end
[i
], check_scalar
))
4683 if (!gfc_resolve_index (ar
->stride
[i
], check_scalar
))
4688 if (ar
->dimen_type
[i
] == DIMEN_UNKNOWN
)
4692 ar
->dimen_type
[i
] = DIMEN_ELEMENT
;
4696 ar
->dimen_type
[i
] = DIMEN_VECTOR
;
4697 if (e
->expr_type
== EXPR_VARIABLE
4698 && e
->symtree
->n
.sym
->ts
.type
== BT_DERIVED
)
4699 ar
->start
[i
] = gfc_get_parentheses (e
);
4703 gfc_error ("Array index at %L is an array of rank %d",
4704 &ar
->c_where
[i
], e
->rank
);
4708 /* Fill in the upper bound, which may be lower than the
4709 specified one for something like a(2:10:5), which is
4710 identical to a(2:7:5). Only relevant for strides not equal
4711 to one. Don't try a division by zero. */
4712 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4713 && ar
->stride
[i
] != NULL
&& ar
->stride
[i
]->expr_type
== EXPR_CONSTANT
4714 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 1L) != 0
4715 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 0L) != 0)
4719 if (gfc_ref_dimen_size (ar
, i
, &size
, &end
))
4721 if (ar
->end
[i
] == NULL
)
4724 gfc_get_constant_expr (BT_INTEGER
, gfc_index_integer_kind
,
4726 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4728 else if (ar
->end
[i
]->ts
.type
== BT_INTEGER
4729 && ar
->end
[i
]->expr_type
== EXPR_CONSTANT
)
4731 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4742 if (ar
->type
== AR_FULL
)
4744 if (ar
->as
->rank
== 0)
4745 ar
->type
= AR_ELEMENT
;
4747 /* Make sure array is the same as array(:,:), this way
4748 we don't need to special case all the time. */
4749 ar
->dimen
= ar
->as
->rank
;
4750 for (i
= 0; i
< ar
->dimen
; i
++)
4752 ar
->dimen_type
[i
] = DIMEN_RANGE
;
4754 gcc_assert (ar
->start
[i
] == NULL
);
4755 gcc_assert (ar
->end
[i
] == NULL
);
4756 gcc_assert (ar
->stride
[i
] == NULL
);
4760 /* If the reference type is unknown, figure out what kind it is. */
4762 if (ar
->type
== AR_UNKNOWN
)
4764 ar
->type
= AR_ELEMENT
;
4765 for (i
= 0; i
< ar
->dimen
; i
++)
4766 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4767 || ar
->dimen_type
[i
] == DIMEN_VECTOR
)
4769 ar
->type
= AR_SECTION
;
4774 if (!ar
->as
->cray_pointee
&& !compare_spec_to_ref (ar
))
4777 if (ar
->as
->corank
&& ar
->codimen
== 0)
4780 ar
->codimen
= ar
->as
->corank
;
4781 for (n
= ar
->dimen
; n
< ar
->dimen
+ ar
->codimen
; n
++)
4782 ar
->dimen_type
[n
] = DIMEN_THIS_IMAGE
;
4790 resolve_substring (gfc_ref
*ref
)
4792 int k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
4794 if (ref
->u
.ss
.start
!= NULL
)
4796 if (!gfc_resolve_expr (ref
->u
.ss
.start
))
4799 if (ref
->u
.ss
.start
->ts
.type
!= BT_INTEGER
)
4801 gfc_error ("Substring start index at %L must be of type INTEGER",
4802 &ref
->u
.ss
.start
->where
);
4806 if (ref
->u
.ss
.start
->rank
!= 0)
4808 gfc_error ("Substring start index at %L must be scalar",
4809 &ref
->u
.ss
.start
->where
);
4813 if (compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_LT
4814 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4815 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4817 gfc_error ("Substring start index at %L is less than one",
4818 &ref
->u
.ss
.start
->where
);
4823 if (ref
->u
.ss
.end
!= NULL
)
4825 if (!gfc_resolve_expr (ref
->u
.ss
.end
))
4828 if (ref
->u
.ss
.end
->ts
.type
!= BT_INTEGER
)
4830 gfc_error ("Substring end index at %L must be of type INTEGER",
4831 &ref
->u
.ss
.end
->where
);
4835 if (ref
->u
.ss
.end
->rank
!= 0)
4837 gfc_error ("Substring end index at %L must be scalar",
4838 &ref
->u
.ss
.end
->where
);
4842 if (ref
->u
.ss
.length
!= NULL
4843 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_GT
4844 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4845 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4847 gfc_error ("Substring end index at %L exceeds the string length",
4848 &ref
->u
.ss
.start
->where
);
4852 if (compare_bound_mpz_t (ref
->u
.ss
.end
,
4853 gfc_integer_kinds
[k
].huge
) == CMP_GT
4854 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4855 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4857 gfc_error ("Substring end index at %L is too large",
4858 &ref
->u
.ss
.end
->where
);
4867 /* This function supplies missing substring charlens. */
4870 gfc_resolve_substring_charlen (gfc_expr
*e
)
4873 gfc_expr
*start
, *end
;
4874 gfc_typespec
*ts
= NULL
;
4876 for (char_ref
= e
->ref
; char_ref
; char_ref
= char_ref
->next
)
4878 if (char_ref
->type
== REF_SUBSTRING
)
4880 if (char_ref
->type
== REF_COMPONENT
)
4881 ts
= &char_ref
->u
.c
.component
->ts
;
4887 gcc_assert (char_ref
->next
== NULL
);
4891 if (e
->ts
.u
.cl
->length
)
4892 gfc_free_expr (e
->ts
.u
.cl
->length
);
4893 else if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
->attr
.dummy
)
4897 e
->ts
.type
= BT_CHARACTER
;
4898 e
->ts
.kind
= gfc_default_character_kind
;
4901 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
4903 if (char_ref
->u
.ss
.start
)
4904 start
= gfc_copy_expr (char_ref
->u
.ss
.start
);
4906 start
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 1);
4908 if (char_ref
->u
.ss
.end
)
4909 end
= gfc_copy_expr (char_ref
->u
.ss
.end
);
4910 else if (e
->expr_type
== EXPR_VARIABLE
)
4913 ts
= &e
->symtree
->n
.sym
->ts
;
4914 end
= gfc_copy_expr (ts
->u
.cl
->length
);
4921 gfc_free_expr (start
);
4922 gfc_free_expr (end
);
4926 /* Length = (end - start + 1). */
4927 e
->ts
.u
.cl
->length
= gfc_subtract (end
, start
);
4928 e
->ts
.u
.cl
->length
= gfc_add (e
->ts
.u
.cl
->length
,
4929 gfc_get_int_expr (gfc_charlen_int_kind
,
4932 /* F2008, 6.4.1: Both the starting point and the ending point shall
4933 be within the range 1, 2, ..., n unless the starting point exceeds
4934 the ending point, in which case the substring has length zero. */
4936 if (mpz_cmp_si (e
->ts
.u
.cl
->length
->value
.integer
, 0) < 0)
4937 mpz_set_si (e
->ts
.u
.cl
->length
->value
.integer
, 0);
4939 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
4940 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
4942 /* Make sure that the length is simplified. */
4943 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 1);
4944 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
4948 /* Resolve subtype references. */
4951 resolve_ref (gfc_expr
*expr
)
4953 int current_part_dimension
, n_components
, seen_part_dimension
;
4956 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
4957 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.as
== NULL
)
4959 find_array_spec (expr
);
4963 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
4967 if (!resolve_array_ref (&ref
->u
.ar
))
4975 if (!resolve_substring (ref
))
4980 /* Check constraints on part references. */
4982 current_part_dimension
= 0;
4983 seen_part_dimension
= 0;
4986 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
4991 switch (ref
->u
.ar
.type
)
4994 /* Coarray scalar. */
4995 if (ref
->u
.ar
.as
->rank
== 0)
4997 current_part_dimension
= 0;
5002 current_part_dimension
= 1;
5006 current_part_dimension
= 0;
5010 gfc_internal_error ("resolve_ref(): Bad array reference");
5016 if (current_part_dimension
|| seen_part_dimension
)
5019 if (ref
->u
.c
.component
->attr
.pointer
5020 || ref
->u
.c
.component
->attr
.proc_pointer
5021 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5022 && CLASS_DATA (ref
->u
.c
.component
)->attr
.pointer
))
5024 gfc_error ("Component to the right of a part reference "
5025 "with nonzero rank must not have the POINTER "
5026 "attribute at %L", &expr
->where
);
5029 else if (ref
->u
.c
.component
->attr
.allocatable
5030 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5031 && CLASS_DATA (ref
->u
.c
.component
)->attr
.allocatable
))
5034 gfc_error ("Component to the right of a part reference "
5035 "with nonzero rank must not have the ALLOCATABLE "
5036 "attribute at %L", &expr
->where
);
5048 if (((ref
->type
== REF_COMPONENT
&& n_components
> 1)
5049 || ref
->next
== NULL
)
5050 && current_part_dimension
5051 && seen_part_dimension
)
5053 gfc_error ("Two or more part references with nonzero rank must "
5054 "not be specified at %L", &expr
->where
);
5058 if (ref
->type
== REF_COMPONENT
)
5060 if (current_part_dimension
)
5061 seen_part_dimension
= 1;
5063 /* reset to make sure */
5064 current_part_dimension
= 0;
5072 /* Given an expression, determine its shape. This is easier than it sounds.
5073 Leaves the shape array NULL if it is not possible to determine the shape. */
5076 expression_shape (gfc_expr
*e
)
5078 mpz_t array
[GFC_MAX_DIMENSIONS
];
5081 if (e
->rank
<= 0 || e
->shape
!= NULL
)
5084 for (i
= 0; i
< e
->rank
; i
++)
5085 if (!gfc_array_dimen_size (e
, i
, &array
[i
]))
5088 e
->shape
= gfc_get_shape (e
->rank
);
5090 memcpy (e
->shape
, array
, e
->rank
* sizeof (mpz_t
));
5095 for (i
--; i
>= 0; i
--)
5096 mpz_clear (array
[i
]);
5100 /* Given a variable expression node, compute the rank of the expression by
5101 examining the base symbol and any reference structures it may have. */
5104 expression_rank (gfc_expr
*e
)
5109 /* Just to make sure, because EXPR_COMPCALL's also have an e->ref and that
5110 could lead to serious confusion... */
5111 gcc_assert (e
->expr_type
!= EXPR_COMPCALL
);
5115 if (e
->expr_type
== EXPR_ARRAY
)
5117 /* Constructors can have a rank different from one via RESHAPE(). */
5119 if (e
->symtree
== NULL
)
5125 e
->rank
= (e
->symtree
->n
.sym
->as
== NULL
)
5126 ? 0 : e
->symtree
->n
.sym
->as
->rank
;
5132 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5134 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.proc_pointer
5135 && ref
->u
.c
.component
->attr
.function
&& !ref
->next
)
5136 rank
= ref
->u
.c
.component
->as
? ref
->u
.c
.component
->as
->rank
: 0;
5138 if (ref
->type
!= REF_ARRAY
)
5141 if (ref
->u
.ar
.type
== AR_FULL
)
5143 rank
= ref
->u
.ar
.as
->rank
;
5147 if (ref
->u
.ar
.type
== AR_SECTION
)
5149 /* Figure out the rank of the section. */
5151 gfc_internal_error ("expression_rank(): Two array specs");
5153 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
5154 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_RANGE
5155 || ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
)
5165 expression_shape (e
);
5170 add_caf_get_intrinsic (gfc_expr
*e
)
5172 gfc_expr
*wrapper
, *tmp_expr
;
5176 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5177 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5182 for (n
= ref
->u
.ar
.dimen
; n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
5183 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_ELEMENT
)
5186 tmp_expr
= XCNEW (gfc_expr
);
5188 wrapper
= gfc_build_intrinsic_call (gfc_current_ns
, GFC_ISYM_CAF_GET
,
5189 "caf_get", tmp_expr
->where
, 1, tmp_expr
);
5190 wrapper
->ts
= e
->ts
;
5191 wrapper
->rank
= e
->rank
;
5193 wrapper
->shape
= gfc_copy_shape (e
->shape
, e
->rank
);
5200 remove_caf_get_intrinsic (gfc_expr
*e
)
5202 gcc_assert (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
5203 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
);
5204 gfc_expr
*e2
= e
->value
.function
.actual
->expr
;
5205 e
->value
.function
.actual
->expr
= NULL
;
5206 gfc_free_actual_arglist (e
->value
.function
.actual
);
5207 gfc_free_shape (&e
->shape
, e
->rank
);
5213 /* Resolve a variable expression. */
5216 resolve_variable (gfc_expr
*e
)
5223 if (e
->symtree
== NULL
)
5225 sym
= e
->symtree
->n
.sym
;
5227 /* Use same check as for TYPE(*) below; this check has to be before TYPE(*)
5228 as ts.type is set to BT_ASSUMED in resolve_symbol. */
5229 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
5231 if (!actual_arg
|| inquiry_argument
)
5233 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may only "
5234 "be used as actual argument", sym
->name
, &e
->where
);
5238 /* TS 29113, 407b. */
5239 else if (e
->ts
.type
== BT_ASSUMED
)
5243 gfc_error ("Assumed-type variable %s at %L may only be used "
5244 "as actual argument", sym
->name
, &e
->where
);
5247 else if (inquiry_argument
&& !first_actual_arg
)
5249 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5250 for all inquiry functions in resolve_function; the reason is
5251 that the function-name resolution happens too late in that
5253 gfc_error ("Assumed-type variable %s at %L as actual argument to "
5254 "an inquiry function shall be the first argument",
5255 sym
->name
, &e
->where
);
5259 /* TS 29113, C535b. */
5260 else if ((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5261 && CLASS_DATA (sym
)->as
5262 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5263 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5264 && sym
->as
->type
== AS_ASSUMED_RANK
))
5268 gfc_error ("Assumed-rank variable %s at %L may only be used as "
5269 "actual argument", sym
->name
, &e
->where
);
5272 else if (inquiry_argument
&& !first_actual_arg
)
5274 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5275 for all inquiry functions in resolve_function; the reason is
5276 that the function-name resolution happens too late in that
5278 gfc_error ("Assumed-rank variable %s at %L as actual argument "
5279 "to an inquiry function shall be the first argument",
5280 sym
->name
, &e
->where
);
5285 if ((sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
)) && e
->ref
5286 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5287 && e
->ref
->next
== NULL
))
5289 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall not have "
5290 "a subobject reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5293 /* TS 29113, 407b. */
5294 else if (e
->ts
.type
== BT_ASSUMED
&& e
->ref
5295 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5296 && e
->ref
->next
== NULL
))
5298 gfc_error ("Assumed-type variable %s at %L shall not have a subobject "
5299 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5303 /* TS 29113, C535b. */
5304 if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5305 && CLASS_DATA (sym
)->as
5306 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5307 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5308 && sym
->as
->type
== AS_ASSUMED_RANK
))
5310 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5311 && e
->ref
->next
== NULL
))
5313 gfc_error ("Assumed-rank variable %s at %L shall not have a subobject "
5314 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5318 /* For variables that are used in an associate (target => object) where
5319 the object's basetype is array valued while the target is scalar,
5320 the ts' type of the component refs is still array valued, which
5321 can't be translated that way. */
5322 if (sym
->assoc
&& e
->rank
== 0 && e
->ref
&& sym
->ts
.type
== BT_CLASS
5323 && sym
->assoc
->target
->ts
.type
== BT_CLASS
5324 && CLASS_DATA (sym
->assoc
->target
)->as
)
5326 gfc_ref
*ref
= e
->ref
;
5332 ref
->u
.c
.sym
= sym
->ts
.u
.derived
;
5333 /* Stop the loop. */
5343 /* If this is an associate-name, it may be parsed with an array reference
5344 in error even though the target is scalar. Fail directly in this case.
5345 TODO Understand why class scalar expressions must be excluded. */
5346 if (sym
->assoc
&& !(sym
->ts
.type
== BT_CLASS
&& e
->rank
== 0))
5348 if (sym
->ts
.type
== BT_CLASS
)
5349 gfc_fix_class_refs (e
);
5350 if (!sym
->attr
.dimension
&& e
->ref
&& e
->ref
->type
== REF_ARRAY
)
5354 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.generic
)
5355 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
5357 /* On the other hand, the parser may not have known this is an array;
5358 in this case, we have to add a FULL reference. */
5359 if (sym
->assoc
&& sym
->attr
.dimension
&& !e
->ref
)
5361 e
->ref
= gfc_get_ref ();
5362 e
->ref
->type
= REF_ARRAY
;
5363 e
->ref
->u
.ar
.type
= AR_FULL
;
5364 e
->ref
->u
.ar
.dimen
= 0;
5367 /* Like above, but for class types, where the checking whether an array
5368 ref is present is more complicated. Furthermore make sure not to add
5369 the full array ref to _vptr or _len refs. */
5370 if (sym
->assoc
&& sym
->ts
.type
== BT_CLASS
5371 && CLASS_DATA (sym
)->attr
.dimension
5372 && (e
->ts
.type
!= BT_DERIVED
|| !e
->ts
.u
.derived
->attr
.vtype
))
5374 gfc_ref
*ref
, *newref
;
5376 newref
= gfc_get_ref ();
5377 newref
->type
= REF_ARRAY
;
5378 newref
->u
.ar
.type
= AR_FULL
;
5379 newref
->u
.ar
.dimen
= 0;
5380 /* Because this is an associate var and the first ref either is a ref to
5381 the _data component or not, no traversal of the ref chain is
5382 needed. The array ref needs to be inserted after the _data ref,
5383 or when that is not present, which may happend for polymorphic
5384 types, then at the first position. */
5388 else if (ref
->type
== REF_COMPONENT
5389 && strcmp ("_data", ref
->u
.c
.component
->name
) == 0)
5391 if (!ref
->next
|| ref
->next
->type
!= REF_ARRAY
)
5393 newref
->next
= ref
->next
;
5397 /* Array ref present already. */
5398 gfc_free_ref_list (newref
);
5400 else if (ref
->type
== REF_ARRAY
)
5401 /* Array ref present already. */
5402 gfc_free_ref_list (newref
);
5410 if (e
->ref
&& !resolve_ref (e
))
5413 if (sym
->attr
.flavor
== FL_PROCEDURE
5414 && (!sym
->attr
.function
5415 || (sym
->attr
.function
&& sym
->result
5416 && sym
->result
->attr
.proc_pointer
5417 && !sym
->result
->attr
.function
)))
5419 e
->ts
.type
= BT_PROCEDURE
;
5420 goto resolve_procedure
;
5423 if (sym
->ts
.type
!= BT_UNKNOWN
)
5424 gfc_variable_attr (e
, &e
->ts
);
5425 else if (sym
->attr
.flavor
== FL_PROCEDURE
5426 && sym
->attr
.function
&& sym
->result
5427 && sym
->result
->ts
.type
!= BT_UNKNOWN
5428 && sym
->result
->attr
.proc_pointer
)
5429 e
->ts
= sym
->result
->ts
;
5432 /* Must be a simple variable reference. */
5433 if (!gfc_set_default_type (sym
, 1, sym
->ns
))
5438 if (check_assumed_size_reference (sym
, e
))
5441 /* Deal with forward references to entries during gfc_resolve_code, to
5442 satisfy, at least partially, 12.5.2.5. */
5443 if (gfc_current_ns
->entries
5444 && current_entry_id
== sym
->entry_id
5447 && cs_base
->current
->op
!= EXEC_ENTRY
)
5449 gfc_entry_list
*entry
;
5450 gfc_formal_arglist
*formal
;
5452 bool seen
, saved_specification_expr
;
5454 /* If the symbol is a dummy... */
5455 if (sym
->attr
.dummy
&& sym
->ns
== gfc_current_ns
)
5457 entry
= gfc_current_ns
->entries
;
5460 /* ...test if the symbol is a parameter of previous entries. */
5461 for (; entry
&& entry
->id
<= current_entry_id
; entry
= entry
->next
)
5462 for (formal
= entry
->sym
->formal
; formal
; formal
= formal
->next
)
5464 if (formal
->sym
&& sym
->name
== formal
->sym
->name
)
5471 /* If it has not been seen as a dummy, this is an error. */
5474 if (specification_expr
)
5475 gfc_error ("Variable %qs, used in a specification expression"
5476 ", is referenced at %L before the ENTRY statement "
5477 "in which it is a parameter",
5478 sym
->name
, &cs_base
->current
->loc
);
5480 gfc_error ("Variable %qs is used at %L before the ENTRY "
5481 "statement in which it is a parameter",
5482 sym
->name
, &cs_base
->current
->loc
);
5487 /* Now do the same check on the specification expressions. */
5488 saved_specification_expr
= specification_expr
;
5489 specification_expr
= true;
5490 if (sym
->ts
.type
== BT_CHARACTER
5491 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
5495 for (n
= 0; n
< sym
->as
->rank
; n
++)
5497 if (!gfc_resolve_expr (sym
->as
->lower
[n
]))
5499 if (!gfc_resolve_expr (sym
->as
->upper
[n
]))
5502 specification_expr
= saved_specification_expr
;
5505 /* Update the symbol's entry level. */
5506 sym
->entry_id
= current_entry_id
+ 1;
5509 /* If a symbol has been host_associated mark it. This is used latter,
5510 to identify if aliasing is possible via host association. */
5511 if (sym
->attr
.flavor
== FL_VARIABLE
5512 && gfc_current_ns
->parent
5513 && (gfc_current_ns
->parent
== sym
->ns
5514 || (gfc_current_ns
->parent
->parent
5515 && gfc_current_ns
->parent
->parent
== sym
->ns
)))
5516 sym
->attr
.host_assoc
= 1;
5518 if (gfc_current_ns
->proc_name
5519 && sym
->attr
.dimension
5520 && (sym
->ns
!= gfc_current_ns
5521 || sym
->attr
.use_assoc
5522 || sym
->attr
.in_common
))
5523 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
5526 if (t
&& !resolve_procedure_expression (e
))
5529 /* F2008, C617 and C1229. */
5530 if (!inquiry_argument
&& (e
->ts
.type
== BT_CLASS
|| e
->ts
.type
== BT_DERIVED
)
5531 && gfc_is_coindexed (e
))
5533 gfc_ref
*ref
, *ref2
= NULL
;
5535 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5537 if (ref
->type
== REF_COMPONENT
)
5539 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5543 for ( ; ref
; ref
= ref
->next
)
5544 if (ref
->type
== REF_COMPONENT
)
5547 /* Expression itself is not coindexed object. */
5548 if (ref
&& e
->ts
.type
== BT_CLASS
)
5550 gfc_error ("Polymorphic subobject of coindexed object at %L",
5555 /* Expression itself is coindexed object. */
5559 c
= ref2
? ref2
->u
.c
.component
: e
->symtree
->n
.sym
->components
;
5560 for ( ; c
; c
= c
->next
)
5561 if (c
->attr
.allocatable
&& c
->ts
.type
== BT_CLASS
)
5563 gfc_error ("Coindexed object with polymorphic allocatable "
5564 "subcomponent at %L", &e
->where
);
5572 expression_rank (e
);
5574 if (t
&& flag_coarray
== GFC_FCOARRAY_LIB
&& gfc_is_coindexed (e
))
5575 add_caf_get_intrinsic (e
);
5581 /* Checks to see that the correct symbol has been host associated.
5582 The only situation where this arises is that in which a twice
5583 contained function is parsed after the host association is made.
5584 Therefore, on detecting this, change the symbol in the expression
5585 and convert the array reference into an actual arglist if the old
5586 symbol is a variable. */
5588 check_host_association (gfc_expr
*e
)
5590 gfc_symbol
*sym
, *old_sym
;
5594 gfc_actual_arglist
*arg
, *tail
= NULL
;
5595 bool retval
= e
->expr_type
== EXPR_FUNCTION
;
5597 /* If the expression is the result of substitution in
5598 interface.c(gfc_extend_expr) because there is no way in
5599 which the host association can be wrong. */
5600 if (e
->symtree
== NULL
5601 || e
->symtree
->n
.sym
== NULL
5602 || e
->user_operator
)
5605 old_sym
= e
->symtree
->n
.sym
;
5607 if (gfc_current_ns
->parent
5608 && old_sym
->ns
!= gfc_current_ns
)
5610 /* Use the 'USE' name so that renamed module symbols are
5611 correctly handled. */
5612 gfc_find_symbol (e
->symtree
->name
, gfc_current_ns
, 1, &sym
);
5614 if (sym
&& old_sym
!= sym
5615 && sym
->ts
.type
== old_sym
->ts
.type
5616 && sym
->attr
.flavor
== FL_PROCEDURE
5617 && sym
->attr
.contained
)
5619 /* Clear the shape, since it might not be valid. */
5620 gfc_free_shape (&e
->shape
, e
->rank
);
5622 /* Give the expression the right symtree! */
5623 gfc_find_sym_tree (e
->symtree
->name
, NULL
, 1, &st
);
5624 gcc_assert (st
!= NULL
);
5626 if (old_sym
->attr
.flavor
== FL_PROCEDURE
5627 || e
->expr_type
== EXPR_FUNCTION
)
5629 /* Original was function so point to the new symbol, since
5630 the actual argument list is already attached to the
5632 e
->value
.function
.esym
= NULL
;
5637 /* Original was variable so convert array references into
5638 an actual arglist. This does not need any checking now
5639 since resolve_function will take care of it. */
5640 e
->value
.function
.actual
= NULL
;
5641 e
->expr_type
= EXPR_FUNCTION
;
5644 /* Ambiguity will not arise if the array reference is not
5645 the last reference. */
5646 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5647 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
5650 gcc_assert (ref
->type
== REF_ARRAY
);
5652 /* Grab the start expressions from the array ref and
5653 copy them into actual arguments. */
5654 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
5656 arg
= gfc_get_actual_arglist ();
5657 arg
->expr
= gfc_copy_expr (ref
->u
.ar
.start
[n
]);
5658 if (e
->value
.function
.actual
== NULL
)
5659 tail
= e
->value
.function
.actual
= arg
;
5667 /* Dump the reference list and set the rank. */
5668 gfc_free_ref_list (e
->ref
);
5670 e
->rank
= sym
->as
? sym
->as
->rank
: 0;
5673 gfc_resolve_expr (e
);
5677 /* This might have changed! */
5678 return e
->expr_type
== EXPR_FUNCTION
;
5683 gfc_resolve_character_operator (gfc_expr
*e
)
5685 gfc_expr
*op1
= e
->value
.op
.op1
;
5686 gfc_expr
*op2
= e
->value
.op
.op2
;
5687 gfc_expr
*e1
= NULL
;
5688 gfc_expr
*e2
= NULL
;
5690 gcc_assert (e
->value
.op
.op
== INTRINSIC_CONCAT
);
5692 if (op1
->ts
.u
.cl
&& op1
->ts
.u
.cl
->length
)
5693 e1
= gfc_copy_expr (op1
->ts
.u
.cl
->length
);
5694 else if (op1
->expr_type
== EXPR_CONSTANT
)
5695 e1
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5696 op1
->value
.character
.length
);
5698 if (op2
->ts
.u
.cl
&& op2
->ts
.u
.cl
->length
)
5699 e2
= gfc_copy_expr (op2
->ts
.u
.cl
->length
);
5700 else if (op2
->expr_type
== EXPR_CONSTANT
)
5701 e2
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5702 op2
->value
.character
.length
);
5704 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5714 e
->ts
.u
.cl
->length
= gfc_add (e1
, e2
);
5715 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5716 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5717 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 0);
5718 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5724 /* Ensure that an character expression has a charlen and, if possible, a
5725 length expression. */
5728 fixup_charlen (gfc_expr
*e
)
5730 /* The cases fall through so that changes in expression type and the need
5731 for multiple fixes are picked up. In all circumstances, a charlen should
5732 be available for the middle end to hang a backend_decl on. */
5733 switch (e
->expr_type
)
5736 gfc_resolve_character_operator (e
);
5740 if (e
->expr_type
== EXPR_ARRAY
)
5741 gfc_resolve_character_array_constructor (e
);
5744 case EXPR_SUBSTRING
:
5745 if (!e
->ts
.u
.cl
&& e
->ref
)
5746 gfc_resolve_substring_charlen (e
);
5751 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5758 /* Update an actual argument to include the passed-object for type-bound
5759 procedures at the right position. */
5761 static gfc_actual_arglist
*
5762 update_arglist_pass (gfc_actual_arglist
* lst
, gfc_expr
* po
, unsigned argpos
,
5765 gcc_assert (argpos
> 0);
5769 gfc_actual_arglist
* result
;
5771 result
= gfc_get_actual_arglist ();
5775 result
->name
= name
;
5781 lst
->next
= update_arglist_pass (lst
->next
, po
, argpos
- 1, name
);
5783 lst
= update_arglist_pass (NULL
, po
, argpos
- 1, name
);
5788 /* Extract the passed-object from an EXPR_COMPCALL (a copy of it). */
5791 extract_compcall_passed_object (gfc_expr
* e
)
5795 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
5797 if (e
->value
.compcall
.base_object
)
5798 po
= gfc_copy_expr (e
->value
.compcall
.base_object
);
5801 po
= gfc_get_expr ();
5802 po
->expr_type
= EXPR_VARIABLE
;
5803 po
->symtree
= e
->symtree
;
5804 po
->ref
= gfc_copy_ref (e
->ref
);
5805 po
->where
= e
->where
;
5808 if (!gfc_resolve_expr (po
))
5815 /* Update the arglist of an EXPR_COMPCALL expression to include the
5819 update_compcall_arglist (gfc_expr
* e
)
5822 gfc_typebound_proc
* tbp
;
5824 tbp
= e
->value
.compcall
.tbp
;
5829 po
= extract_compcall_passed_object (e
);
5833 if (tbp
->nopass
|| e
->value
.compcall
.ignore_pass
)
5839 if (tbp
->pass_arg_num
<= 0)
5842 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
5850 /* Extract the passed object from a PPC call (a copy of it). */
5853 extract_ppc_passed_object (gfc_expr
*e
)
5858 po
= gfc_get_expr ();
5859 po
->expr_type
= EXPR_VARIABLE
;
5860 po
->symtree
= e
->symtree
;
5861 po
->ref
= gfc_copy_ref (e
->ref
);
5862 po
->where
= e
->where
;
5864 /* Remove PPC reference. */
5866 while ((*ref
)->next
)
5867 ref
= &(*ref
)->next
;
5868 gfc_free_ref_list (*ref
);
5871 if (!gfc_resolve_expr (po
))
5878 /* Update the actual arglist of a procedure pointer component to include the
5882 update_ppc_arglist (gfc_expr
* e
)
5886 gfc_typebound_proc
* tb
;
5888 ppc
= gfc_get_proc_ptr_comp (e
);
5896 else if (tb
->nopass
)
5899 po
= extract_ppc_passed_object (e
);
5906 gfc_error ("Passed-object at %L must be scalar", &e
->where
);
5911 if (po
->ts
.type
== BT_DERIVED
&& po
->ts
.u
.derived
->attr
.abstract
)
5913 gfc_error ("Base object for procedure-pointer component call at %L is of"
5914 " ABSTRACT type %qs", &e
->where
, po
->ts
.u
.derived
->name
);
5918 gcc_assert (tb
->pass_arg_num
> 0);
5919 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
5927 /* Check that the object a TBP is called on is valid, i.e. it must not be
5928 of ABSTRACT type (as in subobject%abstract_parent%tbp()). */
5931 check_typebound_baseobject (gfc_expr
* e
)
5934 bool return_value
= false;
5936 base
= extract_compcall_passed_object (e
);
5940 gcc_assert (base
->ts
.type
== BT_DERIVED
|| base
->ts
.type
== BT_CLASS
);
5942 if (base
->ts
.type
== BT_CLASS
&& !gfc_expr_attr (base
).class_ok
)
5946 if (base
->ts
.type
== BT_DERIVED
&& base
->ts
.u
.derived
->attr
.abstract
)
5948 gfc_error ("Base object for type-bound procedure call at %L is of"
5949 " ABSTRACT type %qs", &e
->where
, base
->ts
.u
.derived
->name
);
5953 /* F08:C1230. If the procedure called is NOPASS,
5954 the base object must be scalar. */
5955 if (e
->value
.compcall
.tbp
->nopass
&& base
->rank
!= 0)
5957 gfc_error ("Base object for NOPASS type-bound procedure call at %L must"
5958 " be scalar", &e
->where
);
5962 return_value
= true;
5965 gfc_free_expr (base
);
5966 return return_value
;
5970 /* Resolve a call to a type-bound procedure, either function or subroutine,
5971 statically from the data in an EXPR_COMPCALL expression. The adapted
5972 arglist and the target-procedure symtree are returned. */
5975 resolve_typebound_static (gfc_expr
* e
, gfc_symtree
** target
,
5976 gfc_actual_arglist
** actual
)
5978 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
5979 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
5981 /* Update the actual arglist for PASS. */
5982 if (!update_compcall_arglist (e
))
5985 *actual
= e
->value
.compcall
.actual
;
5986 *target
= e
->value
.compcall
.tbp
->u
.specific
;
5988 gfc_free_ref_list (e
->ref
);
5990 e
->value
.compcall
.actual
= NULL
;
5992 /* If we find a deferred typebound procedure, check for derived types
5993 that an overriding typebound procedure has not been missed. */
5994 if (e
->value
.compcall
.name
5995 && !e
->value
.compcall
.tbp
->non_overridable
5996 && e
->value
.compcall
.base_object
5997 && e
->value
.compcall
.base_object
->ts
.type
== BT_DERIVED
)
6000 gfc_symbol
*derived
;
6002 /* Use the derived type of the base_object. */
6003 derived
= e
->value
.compcall
.base_object
->ts
.u
.derived
;
6006 /* If necessary, go through the inheritance chain. */
6007 while (!st
&& derived
)
6009 /* Look for the typebound procedure 'name'. */
6010 if (derived
->f2k_derived
&& derived
->f2k_derived
->tb_sym_root
)
6011 st
= gfc_find_symtree (derived
->f2k_derived
->tb_sym_root
,
6012 e
->value
.compcall
.name
);
6014 derived
= gfc_get_derived_super_type (derived
);
6017 /* Now find the specific name in the derived type namespace. */
6018 if (st
&& st
->n
.tb
&& st
->n
.tb
->u
.specific
)
6019 gfc_find_sym_tree (st
->n
.tb
->u
.specific
->name
,
6020 derived
->ns
, 1, &st
);
6028 /* Get the ultimate declared type from an expression. In addition,
6029 return the last class/derived type reference and the copy of the
6030 reference list. If check_types is set true, derived types are
6031 identified as well as class references. */
6033 get_declared_from_expr (gfc_ref
**class_ref
, gfc_ref
**new_ref
,
6034 gfc_expr
*e
, bool check_types
)
6036 gfc_symbol
*declared
;
6043 *new_ref
= gfc_copy_ref (e
->ref
);
6045 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
6047 if (ref
->type
!= REF_COMPONENT
)
6050 if ((ref
->u
.c
.component
->ts
.type
== BT_CLASS
6051 || (check_types
&& gfc_bt_struct (ref
->u
.c
.component
->ts
.type
)))
6052 && ref
->u
.c
.component
->attr
.flavor
!= FL_PROCEDURE
)
6054 declared
= ref
->u
.c
.component
->ts
.u
.derived
;
6060 if (declared
== NULL
)
6061 declared
= e
->symtree
->n
.sym
->ts
.u
.derived
;
6067 /* Given an EXPR_COMPCALL calling a GENERIC typebound procedure, figure out
6068 which of the specific bindings (if any) matches the arglist and transform
6069 the expression into a call of that binding. */
6072 resolve_typebound_generic_call (gfc_expr
* e
, const char **name
)
6074 gfc_typebound_proc
* genproc
;
6075 const char* genname
;
6077 gfc_symbol
*derived
;
6079 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6080 genname
= e
->value
.compcall
.name
;
6081 genproc
= e
->value
.compcall
.tbp
;
6083 if (!genproc
->is_generic
)
6086 /* Try the bindings on this type and in the inheritance hierarchy. */
6087 for (; genproc
; genproc
= genproc
->overridden
)
6091 gcc_assert (genproc
->is_generic
);
6092 for (g
= genproc
->u
.generic
; g
; g
= g
->next
)
6095 gfc_actual_arglist
* args
;
6098 gcc_assert (g
->specific
);
6100 if (g
->specific
->error
)
6103 target
= g
->specific
->u
.specific
->n
.sym
;
6105 /* Get the right arglist by handling PASS/NOPASS. */
6106 args
= gfc_copy_actual_arglist (e
->value
.compcall
.actual
);
6107 if (!g
->specific
->nopass
)
6110 po
= extract_compcall_passed_object (e
);
6113 gfc_free_actual_arglist (args
);
6117 gcc_assert (g
->specific
->pass_arg_num
> 0);
6118 gcc_assert (!g
->specific
->error
);
6119 args
= update_arglist_pass (args
, po
, g
->specific
->pass_arg_num
,
6120 g
->specific
->pass_arg
);
6122 resolve_actual_arglist (args
, target
->attr
.proc
,
6123 is_external_proc (target
)
6124 && gfc_sym_get_dummy_args (target
) == NULL
);
6126 /* Check if this arglist matches the formal. */
6127 matches
= gfc_arglist_matches_symbol (&args
, target
);
6129 /* Clean up and break out of the loop if we've found it. */
6130 gfc_free_actual_arglist (args
);
6133 e
->value
.compcall
.tbp
= g
->specific
;
6134 genname
= g
->specific_st
->name
;
6135 /* Pass along the name for CLASS methods, where the vtab
6136 procedure pointer component has to be referenced. */
6144 /* Nothing matching found! */
6145 gfc_error ("Found no matching specific binding for the call to the GENERIC"
6146 " %qs at %L", genname
, &e
->where
);
6150 /* Make sure that we have the right specific instance for the name. */
6151 derived
= get_declared_from_expr (NULL
, NULL
, e
, true);
6153 st
= gfc_find_typebound_proc (derived
, NULL
, genname
, true, &e
->where
);
6155 e
->value
.compcall
.tbp
= st
->n
.tb
;
6161 /* Resolve a call to a type-bound subroutine. */
6164 resolve_typebound_call (gfc_code
* c
, const char **name
, bool *overridable
)
6166 gfc_actual_arglist
* newactual
;
6167 gfc_symtree
* target
;
6169 /* Check that's really a SUBROUTINE. */
6170 if (!c
->expr1
->value
.compcall
.tbp
->subroutine
)
6172 gfc_error ("%qs at %L should be a SUBROUTINE",
6173 c
->expr1
->value
.compcall
.name
, &c
->loc
);
6177 if (!check_typebound_baseobject (c
->expr1
))
6180 /* Pass along the name for CLASS methods, where the vtab
6181 procedure pointer component has to be referenced. */
6183 *name
= c
->expr1
->value
.compcall
.name
;
6185 if (!resolve_typebound_generic_call (c
->expr1
, name
))
6188 /* Pass along the NON_OVERRIDABLE attribute of the specific TBP. */
6190 *overridable
= !c
->expr1
->value
.compcall
.tbp
->non_overridable
;
6192 /* Transform into an ordinary EXEC_CALL for now. */
6194 if (!resolve_typebound_static (c
->expr1
, &target
, &newactual
))
6197 c
->ext
.actual
= newactual
;
6198 c
->symtree
= target
;
6199 c
->op
= (c
->expr1
->value
.compcall
.assign
? EXEC_ASSIGN_CALL
: EXEC_CALL
);
6201 gcc_assert (!c
->expr1
->ref
&& !c
->expr1
->value
.compcall
.actual
);
6203 gfc_free_expr (c
->expr1
);
6204 c
->expr1
= gfc_get_expr ();
6205 c
->expr1
->expr_type
= EXPR_FUNCTION
;
6206 c
->expr1
->symtree
= target
;
6207 c
->expr1
->where
= c
->loc
;
6209 return resolve_call (c
);
6213 /* Resolve a component-call expression. */
6215 resolve_compcall (gfc_expr
* e
, const char **name
)
6217 gfc_actual_arglist
* newactual
;
6218 gfc_symtree
* target
;
6220 /* Check that's really a FUNCTION. */
6221 if (!e
->value
.compcall
.tbp
->function
)
6223 gfc_error ("%qs at %L should be a FUNCTION",
6224 e
->value
.compcall
.name
, &e
->where
);
6228 /* These must not be assign-calls! */
6229 gcc_assert (!e
->value
.compcall
.assign
);
6231 if (!check_typebound_baseobject (e
))
6234 /* Pass along the name for CLASS methods, where the vtab
6235 procedure pointer component has to be referenced. */
6237 *name
= e
->value
.compcall
.name
;
6239 if (!resolve_typebound_generic_call (e
, name
))
6241 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6243 /* Take the rank from the function's symbol. */
6244 if (e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
)
6245 e
->rank
= e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
->rank
;
6247 /* For now, we simply transform it into an EXPR_FUNCTION call with the same
6248 arglist to the TBP's binding target. */
6250 if (!resolve_typebound_static (e
, &target
, &newactual
))
6253 e
->value
.function
.actual
= newactual
;
6254 e
->value
.function
.name
= NULL
;
6255 e
->value
.function
.esym
= target
->n
.sym
;
6256 e
->value
.function
.isym
= NULL
;
6257 e
->symtree
= target
;
6258 e
->ts
= target
->n
.sym
->ts
;
6259 e
->expr_type
= EXPR_FUNCTION
;
6261 /* Resolution is not necessary if this is a class subroutine; this
6262 function only has to identify the specific proc. Resolution of
6263 the call will be done next in resolve_typebound_call. */
6264 return gfc_resolve_expr (e
);
6268 static bool resolve_fl_derived (gfc_symbol
*sym
);
6271 /* Resolve a typebound function, or 'method'. First separate all
6272 the non-CLASS references by calling resolve_compcall directly. */
6275 resolve_typebound_function (gfc_expr
* e
)
6277 gfc_symbol
*declared
;
6289 /* Deal with typebound operators for CLASS objects. */
6290 expr
= e
->value
.compcall
.base_object
;
6291 overridable
= !e
->value
.compcall
.tbp
->non_overridable
;
6292 if (expr
&& expr
->ts
.type
== BT_CLASS
&& e
->value
.compcall
.name
)
6294 /* If the base_object is not a variable, the corresponding actual
6295 argument expression must be stored in e->base_expression so
6296 that the corresponding tree temporary can be used as the base
6297 object in gfc_conv_procedure_call. */
6298 if (expr
->expr_type
!= EXPR_VARIABLE
)
6300 gfc_actual_arglist
*args
;
6302 for (args
= e
->value
.function
.actual
; args
; args
= args
->next
)
6304 if (expr
== args
->expr
)
6309 /* Since the typebound operators are generic, we have to ensure
6310 that any delays in resolution are corrected and that the vtab
6313 declared
= ts
.u
.derived
;
6314 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6315 if (c
->ts
.u
.derived
== NULL
)
6316 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6318 if (!resolve_compcall (e
, &name
))
6321 /* Use the generic name if it is there. */
6322 name
= name
? name
: e
->value
.function
.esym
->name
;
6323 e
->symtree
= expr
->symtree
;
6324 e
->ref
= gfc_copy_ref (expr
->ref
);
6325 get_declared_from_expr (&class_ref
, NULL
, e
, false);
6327 /* Trim away the extraneous references that emerge from nested
6328 use of interface.c (extend_expr). */
6329 if (class_ref
&& class_ref
->next
)
6331 gfc_free_ref_list (class_ref
->next
);
6332 class_ref
->next
= NULL
;
6334 else if (e
->ref
&& !class_ref
&& expr
->ts
.type
!= BT_CLASS
)
6336 gfc_free_ref_list (e
->ref
);
6340 gfc_add_vptr_component (e
);
6341 gfc_add_component_ref (e
, name
);
6342 e
->value
.function
.esym
= NULL
;
6343 if (expr
->expr_type
!= EXPR_VARIABLE
)
6344 e
->base_expr
= expr
;
6349 return resolve_compcall (e
, NULL
);
6351 if (!resolve_ref (e
))
6354 /* Get the CLASS declared type. */
6355 declared
= get_declared_from_expr (&class_ref
, &new_ref
, e
, true);
6357 if (!resolve_fl_derived (declared
))
6360 /* Weed out cases of the ultimate component being a derived type. */
6361 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6362 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6364 gfc_free_ref_list (new_ref
);
6365 return resolve_compcall (e
, NULL
);
6368 c
= gfc_find_component (declared
, "_data", true, true, NULL
);
6369 declared
= c
->ts
.u
.derived
;
6371 /* Treat the call as if it is a typebound procedure, in order to roll
6372 out the correct name for the specific function. */
6373 if (!resolve_compcall (e
, &name
))
6375 gfc_free_ref_list (new_ref
);
6382 /* Convert the expression to a procedure pointer component call. */
6383 e
->value
.function
.esym
= NULL
;
6389 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6390 gfc_add_vptr_component (e
);
6391 gfc_add_component_ref (e
, name
);
6393 /* Recover the typespec for the expression. This is really only
6394 necessary for generic procedures, where the additional call
6395 to gfc_add_component_ref seems to throw the collection of the
6396 correct typespec. */
6400 gfc_free_ref_list (new_ref
);
6405 /* Resolve a typebound subroutine, or 'method'. First separate all
6406 the non-CLASS references by calling resolve_typebound_call
6410 resolve_typebound_subroutine (gfc_code
*code
)
6412 gfc_symbol
*declared
;
6422 st
= code
->expr1
->symtree
;
6424 /* Deal with typebound operators for CLASS objects. */
6425 expr
= code
->expr1
->value
.compcall
.base_object
;
6426 overridable
= !code
->expr1
->value
.compcall
.tbp
->non_overridable
;
6427 if (expr
&& expr
->ts
.type
== BT_CLASS
&& code
->expr1
->value
.compcall
.name
)
6429 /* If the base_object is not a variable, the corresponding actual
6430 argument expression must be stored in e->base_expression so
6431 that the corresponding tree temporary can be used as the base
6432 object in gfc_conv_procedure_call. */
6433 if (expr
->expr_type
!= EXPR_VARIABLE
)
6435 gfc_actual_arglist
*args
;
6437 args
= code
->expr1
->value
.function
.actual
;
6438 for (; args
; args
= args
->next
)
6439 if (expr
== args
->expr
)
6443 /* Since the typebound operators are generic, we have to ensure
6444 that any delays in resolution are corrected and that the vtab
6446 declared
= expr
->ts
.u
.derived
;
6447 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6448 if (c
->ts
.u
.derived
== NULL
)
6449 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6451 if (!resolve_typebound_call (code
, &name
, NULL
))
6454 /* Use the generic name if it is there. */
6455 name
= name
? name
: code
->expr1
->value
.function
.esym
->name
;
6456 code
->expr1
->symtree
= expr
->symtree
;
6457 code
->expr1
->ref
= gfc_copy_ref (expr
->ref
);
6459 /* Trim away the extraneous references that emerge from nested
6460 use of interface.c (extend_expr). */
6461 get_declared_from_expr (&class_ref
, NULL
, code
->expr1
, false);
6462 if (class_ref
&& class_ref
->next
)
6464 gfc_free_ref_list (class_ref
->next
);
6465 class_ref
->next
= NULL
;
6467 else if (code
->expr1
->ref
&& !class_ref
)
6469 gfc_free_ref_list (code
->expr1
->ref
);
6470 code
->expr1
->ref
= NULL
;
6473 /* Now use the procedure in the vtable. */
6474 gfc_add_vptr_component (code
->expr1
);
6475 gfc_add_component_ref (code
->expr1
, name
);
6476 code
->expr1
->value
.function
.esym
= NULL
;
6477 if (expr
->expr_type
!= EXPR_VARIABLE
)
6478 code
->expr1
->base_expr
= expr
;
6483 return resolve_typebound_call (code
, NULL
, NULL
);
6485 if (!resolve_ref (code
->expr1
))
6488 /* Get the CLASS declared type. */
6489 get_declared_from_expr (&class_ref
, &new_ref
, code
->expr1
, true);
6491 /* Weed out cases of the ultimate component being a derived type. */
6492 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6493 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6495 gfc_free_ref_list (new_ref
);
6496 return resolve_typebound_call (code
, NULL
, NULL
);
6499 if (!resolve_typebound_call (code
, &name
, &overridable
))
6501 gfc_free_ref_list (new_ref
);
6504 ts
= code
->expr1
->ts
;
6508 /* Convert the expression to a procedure pointer component call. */
6509 code
->expr1
->value
.function
.esym
= NULL
;
6510 code
->expr1
->symtree
= st
;
6513 code
->expr1
->ref
= new_ref
;
6515 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6516 gfc_add_vptr_component (code
->expr1
);
6517 gfc_add_component_ref (code
->expr1
, name
);
6519 /* Recover the typespec for the expression. This is really only
6520 necessary for generic procedures, where the additional call
6521 to gfc_add_component_ref seems to throw the collection of the
6522 correct typespec. */
6523 code
->expr1
->ts
= ts
;
6526 gfc_free_ref_list (new_ref
);
6532 /* Resolve a CALL to a Procedure Pointer Component (Subroutine). */
6535 resolve_ppc_call (gfc_code
* c
)
6537 gfc_component
*comp
;
6539 comp
= gfc_get_proc_ptr_comp (c
->expr1
);
6540 gcc_assert (comp
!= NULL
);
6542 c
->resolved_sym
= c
->expr1
->symtree
->n
.sym
;
6543 c
->expr1
->expr_type
= EXPR_VARIABLE
;
6545 if (!comp
->attr
.subroutine
)
6546 gfc_add_subroutine (&comp
->attr
, comp
->name
, &c
->expr1
->where
);
6548 if (!resolve_ref (c
->expr1
))
6551 if (!update_ppc_arglist (c
->expr1
))
6554 c
->ext
.actual
= c
->expr1
->value
.compcall
.actual
;
6556 if (!resolve_actual_arglist (c
->ext
.actual
, comp
->attr
.proc
,
6557 !(comp
->ts
.interface
6558 && comp
->ts
.interface
->formal
)))
6561 if (!pure_subroutine (comp
->ts
.interface
, comp
->name
, &c
->expr1
->where
))
6564 gfc_ppc_use (comp
, &c
->expr1
->value
.compcall
.actual
, &c
->expr1
->where
);
6570 /* Resolve a Function Call to a Procedure Pointer Component (Function). */
6573 resolve_expr_ppc (gfc_expr
* e
)
6575 gfc_component
*comp
;
6577 comp
= gfc_get_proc_ptr_comp (e
);
6578 gcc_assert (comp
!= NULL
);
6580 /* Convert to EXPR_FUNCTION. */
6581 e
->expr_type
= EXPR_FUNCTION
;
6582 e
->value
.function
.isym
= NULL
;
6583 e
->value
.function
.actual
= e
->value
.compcall
.actual
;
6585 if (comp
->as
!= NULL
)
6586 e
->rank
= comp
->as
->rank
;
6588 if (!comp
->attr
.function
)
6589 gfc_add_function (&comp
->attr
, comp
->name
, &e
->where
);
6591 if (!resolve_ref (e
))
6594 if (!resolve_actual_arglist (e
->value
.function
.actual
, comp
->attr
.proc
,
6595 !(comp
->ts
.interface
6596 && comp
->ts
.interface
->formal
)))
6599 if (!update_ppc_arglist (e
))
6602 if (!check_pure_function(e
))
6605 gfc_ppc_use (comp
, &e
->value
.compcall
.actual
, &e
->where
);
6612 gfc_is_expandable_expr (gfc_expr
*e
)
6614 gfc_constructor
*con
;
6616 if (e
->expr_type
== EXPR_ARRAY
)
6618 /* Traverse the constructor looking for variables that are flavor
6619 parameter. Parameters must be expanded since they are fully used at
6621 con
= gfc_constructor_first (e
->value
.constructor
);
6622 for (; con
; con
= gfc_constructor_next (con
))
6624 if (con
->expr
->expr_type
== EXPR_VARIABLE
6625 && con
->expr
->symtree
6626 && (con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
6627 || con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_VARIABLE
))
6629 if (con
->expr
->expr_type
== EXPR_ARRAY
6630 && gfc_is_expandable_expr (con
->expr
))
6639 /* Sometimes variables in specification expressions of the result
6640 of module procedures in submodules wind up not being the 'real'
6641 dummy. Find this, if possible, in the namespace of the first
6645 fixup_unique_dummy (gfc_expr
*e
)
6647 gfc_symtree
*st
= NULL
;
6648 gfc_symbol
*s
= NULL
;
6650 if (e
->symtree
->n
.sym
->ns
->proc_name
6651 && e
->symtree
->n
.sym
->ns
->proc_name
->formal
)
6652 s
= e
->symtree
->n
.sym
->ns
->proc_name
->formal
->sym
;
6655 st
= gfc_find_symtree (s
->ns
->sym_root
, e
->symtree
->n
.sym
->name
);
6658 && st
->n
.sym
!= NULL
6659 && st
->n
.sym
->attr
.dummy
)
6663 /* Resolve an expression. That is, make sure that types of operands agree
6664 with their operators, intrinsic operators are converted to function calls
6665 for overloaded types and unresolved function references are resolved. */
6668 gfc_resolve_expr (gfc_expr
*e
)
6671 bool inquiry_save
, actual_arg_save
, first_actual_arg_save
;
6676 /* inquiry_argument only applies to variables. */
6677 inquiry_save
= inquiry_argument
;
6678 actual_arg_save
= actual_arg
;
6679 first_actual_arg_save
= first_actual_arg
;
6681 if (e
->expr_type
!= EXPR_VARIABLE
)
6683 inquiry_argument
= false;
6685 first_actual_arg
= false;
6687 else if (e
->symtree
!= NULL
6688 && *e
->symtree
->name
== '@'
6689 && e
->symtree
->n
.sym
->attr
.dummy
)
6691 /* Deal with submodule specification expressions that are not
6692 found to be referenced in module.c(read_cleanup). */
6693 fixup_unique_dummy (e
);
6696 switch (e
->expr_type
)
6699 t
= resolve_operator (e
);
6705 if (check_host_association (e
))
6706 t
= resolve_function (e
);
6708 t
= resolve_variable (e
);
6710 if (e
->ts
.type
== BT_CHARACTER
&& e
->ts
.u
.cl
== NULL
&& e
->ref
6711 && e
->ref
->type
!= REF_SUBSTRING
)
6712 gfc_resolve_substring_charlen (e
);
6717 t
= resolve_typebound_function (e
);
6720 case EXPR_SUBSTRING
:
6721 t
= resolve_ref (e
);
6730 t
= resolve_expr_ppc (e
);
6735 if (!resolve_ref (e
))
6738 t
= gfc_resolve_array_constructor (e
);
6739 /* Also try to expand a constructor. */
6742 expression_rank (e
);
6743 if (gfc_is_constant_expr (e
) || gfc_is_expandable_expr (e
))
6744 gfc_expand_constructor (e
, false);
6747 /* This provides the opportunity for the length of constructors with
6748 character valued function elements to propagate the string length
6749 to the expression. */
6750 if (t
&& e
->ts
.type
== BT_CHARACTER
)
6752 /* For efficiency, we call gfc_expand_constructor for BT_CHARACTER
6753 here rather then add a duplicate test for it above. */
6754 gfc_expand_constructor (e
, false);
6755 t
= gfc_resolve_character_array_constructor (e
);
6760 case EXPR_STRUCTURE
:
6761 t
= resolve_ref (e
);
6765 t
= resolve_structure_cons (e
, 0);
6769 t
= gfc_simplify_expr (e
, 0);
6773 gfc_internal_error ("gfc_resolve_expr(): Bad expression type");
6776 if (e
->ts
.type
== BT_CHARACTER
&& t
&& !e
->ts
.u
.cl
)
6779 inquiry_argument
= inquiry_save
;
6780 actual_arg
= actual_arg_save
;
6781 first_actual_arg
= first_actual_arg_save
;
6787 /* Resolve an expression from an iterator. They must be scalar and have
6788 INTEGER or (optionally) REAL type. */
6791 gfc_resolve_iterator_expr (gfc_expr
*expr
, bool real_ok
,
6792 const char *name_msgid
)
6794 if (!gfc_resolve_expr (expr
))
6797 if (expr
->rank
!= 0)
6799 gfc_error ("%s at %L must be a scalar", _(name_msgid
), &expr
->where
);
6803 if (expr
->ts
.type
!= BT_INTEGER
)
6805 if (expr
->ts
.type
== BT_REAL
)
6808 return gfc_notify_std (GFC_STD_F95_DEL
,
6809 "%s at %L must be integer",
6810 _(name_msgid
), &expr
->where
);
6813 gfc_error ("%s at %L must be INTEGER", _(name_msgid
),
6820 gfc_error ("%s at %L must be INTEGER", _(name_msgid
), &expr
->where
);
6828 /* Resolve the expressions in an iterator structure. If REAL_OK is
6829 false allow only INTEGER type iterators, otherwise allow REAL types.
6830 Set own_scope to true for ac-implied-do and data-implied-do as those
6831 have a separate scope such that, e.g., a INTENT(IN) doesn't apply. */
6834 gfc_resolve_iterator (gfc_iterator
*iter
, bool real_ok
, bool own_scope
)
6836 if (!gfc_resolve_iterator_expr (iter
->var
, real_ok
, "Loop variable"))
6839 if (!gfc_check_vardef_context (iter
->var
, false, false, own_scope
,
6840 _("iterator variable")))
6843 if (!gfc_resolve_iterator_expr (iter
->start
, real_ok
,
6844 "Start expression in DO loop"))
6847 if (!gfc_resolve_iterator_expr (iter
->end
, real_ok
,
6848 "End expression in DO loop"))
6851 if (!gfc_resolve_iterator_expr (iter
->step
, real_ok
,
6852 "Step expression in DO loop"))
6855 if (iter
->step
->expr_type
== EXPR_CONSTANT
)
6857 if ((iter
->step
->ts
.type
== BT_INTEGER
6858 && mpz_cmp_ui (iter
->step
->value
.integer
, 0) == 0)
6859 || (iter
->step
->ts
.type
== BT_REAL
6860 && mpfr_sgn (iter
->step
->value
.real
) == 0))
6862 gfc_error ("Step expression in DO loop at %L cannot be zero",
6863 &iter
->step
->where
);
6868 /* Convert start, end, and step to the same type as var. */
6869 if (iter
->start
->ts
.kind
!= iter
->var
->ts
.kind
6870 || iter
->start
->ts
.type
!= iter
->var
->ts
.type
)
6871 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
6873 if (iter
->end
->ts
.kind
!= iter
->var
->ts
.kind
6874 || iter
->end
->ts
.type
!= iter
->var
->ts
.type
)
6875 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
6877 if (iter
->step
->ts
.kind
!= iter
->var
->ts
.kind
6878 || iter
->step
->ts
.type
!= iter
->var
->ts
.type
)
6879 gfc_convert_type (iter
->step
, &iter
->var
->ts
, 1);
6881 if (iter
->start
->expr_type
== EXPR_CONSTANT
6882 && iter
->end
->expr_type
== EXPR_CONSTANT
6883 && iter
->step
->expr_type
== EXPR_CONSTANT
)
6886 if (iter
->start
->ts
.type
== BT_INTEGER
)
6888 sgn
= mpz_cmp_ui (iter
->step
->value
.integer
, 0);
6889 cmp
= mpz_cmp (iter
->end
->value
.integer
, iter
->start
->value
.integer
);
6893 sgn
= mpfr_sgn (iter
->step
->value
.real
);
6894 cmp
= mpfr_cmp (iter
->end
->value
.real
, iter
->start
->value
.real
);
6896 if (warn_zerotrip
&& ((sgn
> 0 && cmp
< 0) || (sgn
< 0 && cmp
> 0)))
6897 gfc_warning (OPT_Wzerotrip
,
6898 "DO loop at %L will be executed zero times",
6899 &iter
->step
->where
);
6902 if (iter
->end
->expr_type
== EXPR_CONSTANT
6903 && iter
->end
->ts
.type
== BT_INTEGER
6904 && iter
->step
->expr_type
== EXPR_CONSTANT
6905 && iter
->step
->ts
.type
== BT_INTEGER
6906 && (mpz_cmp_si (iter
->step
->value
.integer
, -1L) == 0
6907 || mpz_cmp_si (iter
->step
->value
.integer
, 1L) == 0))
6909 bool is_step_positive
= mpz_cmp_ui (iter
->step
->value
.integer
, 1) == 0;
6910 int k
= gfc_validate_kind (BT_INTEGER
, iter
->end
->ts
.kind
, false);
6912 if (is_step_positive
6913 && mpz_cmp (iter
->end
->value
.integer
, gfc_integer_kinds
[k
].huge
) == 0)
6914 gfc_warning (OPT_Wundefined_do_loop
,
6915 "DO loop at %L is undefined as it overflows",
6916 &iter
->step
->where
);
6917 else if (!is_step_positive
6918 && mpz_cmp (iter
->end
->value
.integer
,
6919 gfc_integer_kinds
[k
].min_int
) == 0)
6920 gfc_warning (OPT_Wundefined_do_loop
,
6921 "DO loop at %L is undefined as it underflows",
6922 &iter
->step
->where
);
6929 /* Traversal function for find_forall_index. f == 2 signals that
6930 that variable itself is not to be checked - only the references. */
6933 forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int *f
)
6935 if (expr
->expr_type
!= EXPR_VARIABLE
)
6938 /* A scalar assignment */
6939 if (!expr
->ref
|| *f
== 1)
6941 if (expr
->symtree
->n
.sym
== sym
)
6953 /* Check whether the FORALL index appears in the expression or not.
6954 Returns true if SYM is found in EXPR. */
6957 find_forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int f
)
6959 if (gfc_traverse_expr (expr
, sym
, forall_index
, f
))
6966 /* Resolve a list of FORALL iterators. The FORALL index-name is constrained
6967 to be a scalar INTEGER variable. The subscripts and stride are scalar
6968 INTEGERs, and if stride is a constant it must be nonzero.
6969 Furthermore "A subscript or stride in a forall-triplet-spec shall
6970 not contain a reference to any index-name in the
6971 forall-triplet-spec-list in which it appears." (7.5.4.1) */
6974 resolve_forall_iterators (gfc_forall_iterator
*it
)
6976 gfc_forall_iterator
*iter
, *iter2
;
6978 for (iter
= it
; iter
; iter
= iter
->next
)
6980 if (gfc_resolve_expr (iter
->var
)
6981 && (iter
->var
->ts
.type
!= BT_INTEGER
|| iter
->var
->rank
!= 0))
6982 gfc_error ("FORALL index-name at %L must be a scalar INTEGER",
6985 if (gfc_resolve_expr (iter
->start
)
6986 && (iter
->start
->ts
.type
!= BT_INTEGER
|| iter
->start
->rank
!= 0))
6987 gfc_error ("FORALL start expression at %L must be a scalar INTEGER",
6988 &iter
->start
->where
);
6989 if (iter
->var
->ts
.kind
!= iter
->start
->ts
.kind
)
6990 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
6992 if (gfc_resolve_expr (iter
->end
)
6993 && (iter
->end
->ts
.type
!= BT_INTEGER
|| iter
->end
->rank
!= 0))
6994 gfc_error ("FORALL end expression at %L must be a scalar INTEGER",
6996 if (iter
->var
->ts
.kind
!= iter
->end
->ts
.kind
)
6997 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
6999 if (gfc_resolve_expr (iter
->stride
))
7001 if (iter
->stride
->ts
.type
!= BT_INTEGER
|| iter
->stride
->rank
!= 0)
7002 gfc_error ("FORALL stride expression at %L must be a scalar %s",
7003 &iter
->stride
->where
, "INTEGER");
7005 if (iter
->stride
->expr_type
== EXPR_CONSTANT
7006 && mpz_cmp_ui (iter
->stride
->value
.integer
, 0) == 0)
7007 gfc_error ("FORALL stride expression at %L cannot be zero",
7008 &iter
->stride
->where
);
7010 if (iter
->var
->ts
.kind
!= iter
->stride
->ts
.kind
)
7011 gfc_convert_type (iter
->stride
, &iter
->var
->ts
, 1);
7014 for (iter
= it
; iter
; iter
= iter
->next
)
7015 for (iter2
= iter
; iter2
; iter2
= iter2
->next
)
7017 if (find_forall_index (iter2
->start
, iter
->var
->symtree
->n
.sym
, 0)
7018 || find_forall_index (iter2
->end
, iter
->var
->symtree
->n
.sym
, 0)
7019 || find_forall_index (iter2
->stride
, iter
->var
->symtree
->n
.sym
, 0))
7020 gfc_error ("FORALL index %qs may not appear in triplet "
7021 "specification at %L", iter
->var
->symtree
->name
,
7022 &iter2
->start
->where
);
7027 /* Given a pointer to a symbol that is a derived type, see if it's
7028 inaccessible, i.e. if it's defined in another module and the components are
7029 PRIVATE. The search is recursive if necessary. Returns zero if no
7030 inaccessible components are found, nonzero otherwise. */
7033 derived_inaccessible (gfc_symbol
*sym
)
7037 if (sym
->attr
.use_assoc
&& sym
->attr
.private_comp
)
7040 for (c
= sym
->components
; c
; c
= c
->next
)
7042 /* Prevent an infinite loop through this function. */
7043 if (c
->ts
.type
== BT_DERIVED
&& c
->attr
.pointer
7044 && sym
== c
->ts
.u
.derived
)
7047 if (c
->ts
.type
== BT_DERIVED
&& derived_inaccessible (c
->ts
.u
.derived
))
7055 /* Resolve the argument of a deallocate expression. The expression must be
7056 a pointer or a full array. */
7059 resolve_deallocate_expr (gfc_expr
*e
)
7061 symbol_attribute attr
;
7062 int allocatable
, pointer
;
7068 if (!gfc_resolve_expr (e
))
7071 if (e
->expr_type
!= EXPR_VARIABLE
)
7074 sym
= e
->symtree
->n
.sym
;
7075 unlimited
= UNLIMITED_POLY(sym
);
7077 if (sym
->ts
.type
== BT_CLASS
)
7079 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7080 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7084 allocatable
= sym
->attr
.allocatable
;
7085 pointer
= sym
->attr
.pointer
;
7087 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7092 if (ref
->u
.ar
.type
!= AR_FULL
7093 && !(ref
->u
.ar
.type
== AR_ELEMENT
&& ref
->u
.ar
.as
->rank
== 0
7094 && ref
->u
.ar
.codimen
&& gfc_ref_this_image (ref
)))
7099 c
= ref
->u
.c
.component
;
7100 if (c
->ts
.type
== BT_CLASS
)
7102 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7103 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7107 allocatable
= c
->attr
.allocatable
;
7108 pointer
= c
->attr
.pointer
;
7118 attr
= gfc_expr_attr (e
);
7120 if (allocatable
== 0 && attr
.pointer
== 0 && !unlimited
)
7123 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7129 if (gfc_is_coindexed (e
))
7131 gfc_error ("Coindexed allocatable object at %L", &e
->where
);
7136 && !gfc_check_vardef_context (e
, true, true, false,
7137 _("DEALLOCATE object")))
7139 if (!gfc_check_vardef_context (e
, false, true, false,
7140 _("DEALLOCATE object")))
7147 /* Returns true if the expression e contains a reference to the symbol sym. */
7149 sym_in_expr (gfc_expr
*e
, gfc_symbol
*sym
, int *f ATTRIBUTE_UNUSED
)
7151 if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
== sym
)
7158 gfc_find_sym_in_expr (gfc_symbol
*sym
, gfc_expr
*e
)
7160 return gfc_traverse_expr (e
, sym
, sym_in_expr
, 0);
7164 /* Given the expression node e for an allocatable/pointer of derived type to be
7165 allocated, get the expression node to be initialized afterwards (needed for
7166 derived types with default initializers, and derived types with allocatable
7167 components that need nullification.) */
7170 gfc_expr_to_initialize (gfc_expr
*e
)
7176 result
= gfc_copy_expr (e
);
7178 /* Change the last array reference from AR_ELEMENT to AR_FULL. */
7179 for (ref
= result
->ref
; ref
; ref
= ref
->next
)
7180 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
7182 ref
->u
.ar
.type
= AR_FULL
;
7184 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
7185 ref
->u
.ar
.start
[i
] = ref
->u
.ar
.end
[i
] = ref
->u
.ar
.stride
[i
] = NULL
;
7190 gfc_free_shape (&result
->shape
, result
->rank
);
7192 /* Recalculate rank, shape, etc. */
7193 gfc_resolve_expr (result
);
7198 /* If the last ref of an expression is an array ref, return a copy of the
7199 expression with that one removed. Otherwise, a copy of the original
7200 expression. This is used for allocate-expressions and pointer assignment
7201 LHS, where there may be an array specification that needs to be stripped
7202 off when using gfc_check_vardef_context. */
7205 remove_last_array_ref (gfc_expr
* e
)
7210 e2
= gfc_copy_expr (e
);
7211 for (r
= &e2
->ref
; *r
; r
= &(*r
)->next
)
7212 if ((*r
)->type
== REF_ARRAY
&& !(*r
)->next
)
7214 gfc_free_ref_list (*r
);
7223 /* Used in resolve_allocate_expr to check that a allocation-object and
7224 a source-expr are conformable. This does not catch all possible
7225 cases; in particular a runtime checking is needed. */
7228 conformable_arrays (gfc_expr
*e1
, gfc_expr
*e2
)
7231 for (tail
= e2
->ref
; tail
&& tail
->next
; tail
= tail
->next
);
7233 /* First compare rank. */
7234 if ((tail
&& e1
->rank
!= tail
->u
.ar
.as
->rank
)
7235 || (!tail
&& e1
->rank
!= e2
->rank
))
7237 gfc_error ("Source-expr at %L must be scalar or have the "
7238 "same rank as the allocate-object at %L",
7239 &e1
->where
, &e2
->where
);
7250 for (i
= 0; i
< e1
->rank
; i
++)
7252 if (tail
->u
.ar
.start
[i
] == NULL
)
7255 if (tail
->u
.ar
.end
[i
])
7257 mpz_set (s
, tail
->u
.ar
.end
[i
]->value
.integer
);
7258 mpz_sub (s
, s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7259 mpz_add_ui (s
, s
, 1);
7263 mpz_set (s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7266 if (mpz_cmp (e1
->shape
[i
], s
) != 0)
7268 gfc_error ("Source-expr at %L and allocate-object at %L must "
7269 "have the same shape", &e1
->where
, &e2
->where
);
7282 /* Resolve the expression in an ALLOCATE statement, doing the additional
7283 checks to see whether the expression is OK or not. The expression must
7284 have a trailing array reference that gives the size of the array. */
7287 resolve_allocate_expr (gfc_expr
*e
, gfc_code
*code
, bool *array_alloc_wo_spec
)
7289 int i
, pointer
, allocatable
, dimension
, is_abstract
;
7293 symbol_attribute attr
;
7294 gfc_ref
*ref
, *ref2
;
7297 gfc_symbol
*sym
= NULL
;
7302 /* Mark the utmost array component as being in allocate to allow DIMEN_STAR
7303 checking of coarrays. */
7304 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7305 if (ref
->next
== NULL
)
7308 if (ref
&& ref
->type
== REF_ARRAY
)
7309 ref
->u
.ar
.in_allocate
= true;
7311 if (!gfc_resolve_expr (e
))
7314 /* Make sure the expression is allocatable or a pointer. If it is
7315 pointer, the next-to-last reference must be a pointer. */
7319 sym
= e
->symtree
->n
.sym
;
7321 /* Check whether ultimate component is abstract and CLASS. */
7324 /* Is the allocate-object unlimited polymorphic? */
7325 unlimited
= UNLIMITED_POLY(e
);
7327 if (e
->expr_type
!= EXPR_VARIABLE
)
7330 attr
= gfc_expr_attr (e
);
7331 pointer
= attr
.pointer
;
7332 dimension
= attr
.dimension
;
7333 codimension
= attr
.codimension
;
7337 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
))
7339 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7340 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7341 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
7342 codimension
= CLASS_DATA (sym
)->attr
.codimension
;
7343 is_abstract
= CLASS_DATA (sym
)->attr
.abstract
;
7347 allocatable
= sym
->attr
.allocatable
;
7348 pointer
= sym
->attr
.pointer
;
7349 dimension
= sym
->attr
.dimension
;
7350 codimension
= sym
->attr
.codimension
;
7355 for (ref
= e
->ref
; ref
; ref2
= ref
, ref
= ref
->next
)
7360 if (ref
->u
.ar
.codimen
> 0)
7363 for (n
= ref
->u
.ar
.dimen
;
7364 n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
7365 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_THIS_IMAGE
)
7372 if (ref
->next
!= NULL
)
7380 gfc_error ("Coindexed allocatable object at %L",
7385 c
= ref
->u
.c
.component
;
7386 if (c
->ts
.type
== BT_CLASS
)
7388 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7389 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7390 dimension
= CLASS_DATA (c
)->attr
.dimension
;
7391 codimension
= CLASS_DATA (c
)->attr
.codimension
;
7392 is_abstract
= CLASS_DATA (c
)->attr
.abstract
;
7396 allocatable
= c
->attr
.allocatable
;
7397 pointer
= c
->attr
.pointer
;
7398 dimension
= c
->attr
.dimension
;
7399 codimension
= c
->attr
.codimension
;
7400 is_abstract
= c
->attr
.abstract
;
7412 /* Check for F08:C628. */
7413 if (allocatable
== 0 && pointer
== 0 && !unlimited
)
7415 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7420 /* Some checks for the SOURCE tag. */
7423 /* Check F03:C631. */
7424 if (!gfc_type_compatible (&e
->ts
, &code
->expr3
->ts
))
7426 gfc_error ("Type of entity at %L is type incompatible with "
7427 "source-expr at %L", &e
->where
, &code
->expr3
->where
);
7431 /* Check F03:C632 and restriction following Note 6.18. */
7432 if (code
->expr3
->rank
> 0 && !conformable_arrays (code
->expr3
, e
))
7435 /* Check F03:C633. */
7436 if (code
->expr3
->ts
.kind
!= e
->ts
.kind
&& !unlimited
)
7438 gfc_error ("The allocate-object at %L and the source-expr at %L "
7439 "shall have the same kind type parameter",
7440 &e
->where
, &code
->expr3
->where
);
7444 /* Check F2008, C642. */
7445 if (code
->expr3
->ts
.type
== BT_DERIVED
7446 && ((codimension
&& gfc_expr_attr (code
->expr3
).lock_comp
)
7447 || (code
->expr3
->ts
.u
.derived
->from_intmod
7448 == INTMOD_ISO_FORTRAN_ENV
7449 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7450 == ISOFORTRAN_LOCK_TYPE
)))
7452 gfc_error ("The source-expr at %L shall neither be of type "
7453 "LOCK_TYPE nor have a LOCK_TYPE component if "
7454 "allocate-object at %L is a coarray",
7455 &code
->expr3
->where
, &e
->where
);
7459 /* Check TS18508, C702/C703. */
7460 if (code
->expr3
->ts
.type
== BT_DERIVED
7461 && ((codimension
&& gfc_expr_attr (code
->expr3
).event_comp
)
7462 || (code
->expr3
->ts
.u
.derived
->from_intmod
7463 == INTMOD_ISO_FORTRAN_ENV
7464 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7465 == ISOFORTRAN_EVENT_TYPE
)))
7467 gfc_error ("The source-expr at %L shall neither be of type "
7468 "EVENT_TYPE nor have a EVENT_TYPE component if "
7469 "allocate-object at %L is a coarray",
7470 &code
->expr3
->where
, &e
->where
);
7475 /* Check F08:C629. */
7476 if (is_abstract
&& code
->ext
.alloc
.ts
.type
== BT_UNKNOWN
7479 gcc_assert (e
->ts
.type
== BT_CLASS
);
7480 gfc_error ("Allocating %s of ABSTRACT base type at %L requires a "
7481 "type-spec or source-expr", sym
->name
, &e
->where
);
7485 /* Check F08:C632. */
7486 if (code
->ext
.alloc
.ts
.type
== BT_CHARACTER
&& !e
->ts
.deferred
7487 && !UNLIMITED_POLY (e
))
7491 if (!e
->ts
.u
.cl
->length
)
7494 cmp
= gfc_dep_compare_expr (e
->ts
.u
.cl
->length
,
7495 code
->ext
.alloc
.ts
.u
.cl
->length
);
7496 if (cmp
== 1 || cmp
== -1 || cmp
== -3)
7498 gfc_error ("Allocating %s at %L with type-spec requires the same "
7499 "character-length parameter as in the declaration",
7500 sym
->name
, &e
->where
);
7505 /* In the variable definition context checks, gfc_expr_attr is used
7506 on the expression. This is fooled by the array specification
7507 present in e, thus we have to eliminate that one temporarily. */
7508 e2
= remove_last_array_ref (e
);
7511 t
= gfc_check_vardef_context (e2
, true, true, false,
7512 _("ALLOCATE object"));
7514 t
= gfc_check_vardef_context (e2
, false, true, false,
7515 _("ALLOCATE object"));
7520 if (e
->ts
.type
== BT_CLASS
&& CLASS_DATA (e
)->attr
.dimension
7521 && !code
->expr3
&& code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7523 /* For class arrays, the initialization with SOURCE is done
7524 using _copy and trans_call. It is convenient to exploit that
7525 when the allocated type is different from the declared type but
7526 no SOURCE exists by setting expr3. */
7527 code
->expr3
= gfc_default_initializer (&code
->ext
.alloc
.ts
);
7529 else if (flag_coarray
!= GFC_FCOARRAY_LIB
&& e
->ts
.type
== BT_DERIVED
7530 && e
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
7531 && e
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
7533 /* We have to zero initialize the integer variable. */
7534 code
->expr3
= gfc_get_int_expr (gfc_default_integer_kind
, &e
->where
, 0);
7537 if (e
->ts
.type
== BT_CLASS
&& !unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7539 /* Make sure the vtab symbol is present when
7540 the module variables are generated. */
7541 gfc_typespec ts
= e
->ts
;
7543 ts
= code
->expr3
->ts
;
7544 else if (code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7545 ts
= code
->ext
.alloc
.ts
;
7547 /* Finding the vtab also publishes the type's symbol. Therefore this
7548 statement is necessary. */
7549 gfc_find_derived_vtab (ts
.u
.derived
);
7551 else if (unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7553 /* Again, make sure the vtab symbol is present when
7554 the module variables are generated. */
7555 gfc_typespec
*ts
= NULL
;
7557 ts
= &code
->expr3
->ts
;
7559 ts
= &code
->ext
.alloc
.ts
;
7563 /* Finding the vtab also publishes the type's symbol. Therefore this
7564 statement is necessary. */
7568 if (dimension
== 0 && codimension
== 0)
7571 /* Make sure the last reference node is an array specification. */
7573 if (!ref2
|| ref2
->type
!= REF_ARRAY
|| ref2
->u
.ar
.type
== AR_FULL
7574 || (dimension
&& ref2
->u
.ar
.dimen
== 0))
7579 if (!gfc_notify_std (GFC_STD_F2008
, "Array specification required "
7580 "in ALLOCATE statement at %L", &e
->where
))
7582 if (code
->expr3
->rank
!= 0)
7583 *array_alloc_wo_spec
= true;
7586 gfc_error ("Array specification or array-valued SOURCE= "
7587 "expression required in ALLOCATE statement at %L",
7594 gfc_error ("Array specification required in ALLOCATE statement "
7595 "at %L", &e
->where
);
7600 /* Make sure that the array section reference makes sense in the
7601 context of an ALLOCATE specification. */
7606 for (i
= ar
->dimen
; i
< ar
->dimen
+ ar
->codimen
; i
++)
7607 if (ar
->dimen_type
[i
] == DIMEN_THIS_IMAGE
)
7609 gfc_error ("Coarray specification required in ALLOCATE statement "
7610 "at %L", &e
->where
);
7614 for (i
= 0; i
< ar
->dimen
; i
++)
7616 if (ar
->type
== AR_ELEMENT
|| ar
->type
== AR_FULL
)
7619 switch (ar
->dimen_type
[i
])
7625 if (ar
->start
[i
] != NULL
7626 && ar
->end
[i
] != NULL
7627 && ar
->stride
[i
] == NULL
)
7635 case DIMEN_THIS_IMAGE
:
7636 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7642 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7644 sym
= a
->expr
->symtree
->n
.sym
;
7646 /* TODO - check derived type components. */
7647 if (gfc_bt_struct (sym
->ts
.type
) || sym
->ts
.type
== BT_CLASS
)
7650 if ((ar
->start
[i
] != NULL
7651 && gfc_find_sym_in_expr (sym
, ar
->start
[i
]))
7652 || (ar
->end
[i
] != NULL
7653 && gfc_find_sym_in_expr (sym
, ar
->end
[i
])))
7655 gfc_error ("%qs must not appear in the array specification at "
7656 "%L in the same ALLOCATE statement where it is "
7657 "itself allocated", sym
->name
, &ar
->where
);
7663 for (i
= ar
->dimen
; i
< ar
->codimen
+ ar
->dimen
; i
++)
7665 if (ar
->dimen_type
[i
] == DIMEN_ELEMENT
7666 || ar
->dimen_type
[i
] == DIMEN_RANGE
)
7668 if (i
== (ar
->dimen
+ ar
->codimen
- 1))
7670 gfc_error ("Expected '*' in coindex specification in ALLOCATE "
7671 "statement at %L", &e
->where
);
7677 if (ar
->dimen_type
[i
] == DIMEN_STAR
&& i
== (ar
->dimen
+ ar
->codimen
- 1)
7678 && ar
->stride
[i
] == NULL
)
7681 gfc_error ("Bad coarray specification in ALLOCATE statement at %L",
7695 resolve_allocate_deallocate (gfc_code
*code
, const char *fcn
)
7697 gfc_expr
*stat
, *errmsg
, *pe
, *qe
;
7698 gfc_alloc
*a
, *p
, *q
;
7701 errmsg
= code
->expr2
;
7703 /* Check the stat variable. */
7706 gfc_check_vardef_context (stat
, false, false, false,
7707 _("STAT variable"));
7709 if ((stat
->ts
.type
!= BT_INTEGER
7710 && !(stat
->ref
&& (stat
->ref
->type
== REF_ARRAY
7711 || stat
->ref
->type
== REF_COMPONENT
)))
7713 gfc_error ("Stat-variable at %L must be a scalar INTEGER "
7714 "variable", &stat
->where
);
7716 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7717 if (p
->expr
->symtree
->n
.sym
->name
== stat
->symtree
->n
.sym
->name
)
7719 gfc_ref
*ref1
, *ref2
;
7722 for (ref1
= p
->expr
->ref
, ref2
= stat
->ref
; ref1
&& ref2
;
7723 ref1
= ref1
->next
, ref2
= ref2
->next
)
7725 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7727 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7736 gfc_error ("Stat-variable at %L shall not be %sd within "
7737 "the same %s statement", &stat
->where
, fcn
, fcn
);
7743 /* Check the errmsg variable. */
7747 gfc_warning (0, "ERRMSG at %L is useless without a STAT tag",
7750 gfc_check_vardef_context (errmsg
, false, false, false,
7751 _("ERRMSG variable"));
7753 if ((errmsg
->ts
.type
!= BT_CHARACTER
7755 && (errmsg
->ref
->type
== REF_ARRAY
7756 || errmsg
->ref
->type
== REF_COMPONENT
)))
7757 || errmsg
->rank
> 0 )
7758 gfc_error ("Errmsg-variable at %L must be a scalar CHARACTER "
7759 "variable", &errmsg
->where
);
7761 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7762 if (p
->expr
->symtree
->n
.sym
->name
== errmsg
->symtree
->n
.sym
->name
)
7764 gfc_ref
*ref1
, *ref2
;
7767 for (ref1
= p
->expr
->ref
, ref2
= errmsg
->ref
; ref1
&& ref2
;
7768 ref1
= ref1
->next
, ref2
= ref2
->next
)
7770 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7772 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7781 gfc_error ("Errmsg-variable at %L shall not be %sd within "
7782 "the same %s statement", &errmsg
->where
, fcn
, fcn
);
7788 /* Check that an allocate-object appears only once in the statement. */
7790 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7793 for (q
= p
->next
; q
; q
= q
->next
)
7796 if (pe
->symtree
->n
.sym
->name
== qe
->symtree
->n
.sym
->name
)
7798 /* This is a potential collision. */
7799 gfc_ref
*pr
= pe
->ref
;
7800 gfc_ref
*qr
= qe
->ref
;
7802 /* Follow the references until
7803 a) They start to differ, in which case there is no error;
7804 you can deallocate a%b and a%c in a single statement
7805 b) Both of them stop, which is an error
7806 c) One of them stops, which is also an error. */
7809 if (pr
== NULL
&& qr
== NULL
)
7811 gfc_error ("Allocate-object at %L also appears at %L",
7812 &pe
->where
, &qe
->where
);
7815 else if (pr
!= NULL
&& qr
== NULL
)
7817 gfc_error ("Allocate-object at %L is subobject of"
7818 " object at %L", &pe
->where
, &qe
->where
);
7821 else if (pr
== NULL
&& qr
!= NULL
)
7823 gfc_error ("Allocate-object at %L is subobject of"
7824 " object at %L", &qe
->where
, &pe
->where
);
7827 /* Here, pr != NULL && qr != NULL */
7828 gcc_assert(pr
->type
== qr
->type
);
7829 if (pr
->type
== REF_ARRAY
)
7831 /* Handle cases like allocate(v(3)%x(3), v(2)%x(3)),
7833 gcc_assert (qr
->type
== REF_ARRAY
);
7835 if (pr
->next
&& qr
->next
)
7838 gfc_array_ref
*par
= &(pr
->u
.ar
);
7839 gfc_array_ref
*qar
= &(qr
->u
.ar
);
7841 for (i
=0; i
<par
->dimen
; i
++)
7843 if ((par
->start
[i
] != NULL
7844 || qar
->start
[i
] != NULL
)
7845 && gfc_dep_compare_expr (par
->start
[i
],
7846 qar
->start
[i
]) != 0)
7853 if (pr
->u
.c
.component
->name
!= qr
->u
.c
.component
->name
)
7866 if (strcmp (fcn
, "ALLOCATE") == 0)
7868 bool arr_alloc_wo_spec
= false;
7870 /* Resolving the expr3 in the loop over all objects to allocate would
7871 execute loop invariant code for each loop item. Therefore do it just
7873 if (code
->expr3
&& code
->expr3
->mold
7874 && code
->expr3
->ts
.type
== BT_DERIVED
)
7876 /* Default initialization via MOLD (non-polymorphic). */
7877 gfc_expr
*rhs
= gfc_default_initializer (&code
->expr3
->ts
);
7880 gfc_resolve_expr (rhs
);
7881 gfc_free_expr (code
->expr3
);
7885 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7886 resolve_allocate_expr (a
->expr
, code
, &arr_alloc_wo_spec
);
7888 if (arr_alloc_wo_spec
&& code
->expr3
)
7890 /* Mark the allocate to have to take the array specification
7892 code
->ext
.alloc
.arr_spec_from_expr3
= 1;
7897 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7898 resolve_deallocate_expr (a
->expr
);
7903 /************ SELECT CASE resolution subroutines ************/
7905 /* Callback function for our mergesort variant. Determines interval
7906 overlaps for CASEs. Return <0 if op1 < op2, 0 for overlap, >0 for
7907 op1 > op2. Assumes we're not dealing with the default case.
7908 We have op1 = (:L), (K:L) or (K:) and op2 = (:N), (M:N) or (M:).
7909 There are nine situations to check. */
7912 compare_cases (const gfc_case
*op1
, const gfc_case
*op2
)
7916 if (op1
->low
== NULL
) /* op1 = (:L) */
7918 /* op2 = (:N), so overlap. */
7920 /* op2 = (M:) or (M:N), L < M */
7921 if (op2
->low
!= NULL
7922 && gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
7925 else if (op1
->high
== NULL
) /* op1 = (K:) */
7927 /* op2 = (M:), so overlap. */
7929 /* op2 = (:N) or (M:N), K > N */
7930 if (op2
->high
!= NULL
7931 && gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
7934 else /* op1 = (K:L) */
7936 if (op2
->low
== NULL
) /* op2 = (:N), K > N */
7937 retval
= (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
7939 else if (op2
->high
== NULL
) /* op2 = (M:), L < M */
7940 retval
= (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
7942 else /* op2 = (M:N) */
7946 if (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
7949 else if (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
7958 /* Merge-sort a double linked case list, detecting overlap in the
7959 process. LIST is the head of the double linked case list before it
7960 is sorted. Returns the head of the sorted list if we don't see any
7961 overlap, or NULL otherwise. */
7964 check_case_overlap (gfc_case
*list
)
7966 gfc_case
*p
, *q
, *e
, *tail
;
7967 int insize
, nmerges
, psize
, qsize
, cmp
, overlap_seen
;
7969 /* If the passed list was empty, return immediately. */
7976 /* Loop unconditionally. The only exit from this loop is a return
7977 statement, when we've finished sorting the case list. */
7984 /* Count the number of merges we do in this pass. */
7987 /* Loop while there exists a merge to be done. */
7992 /* Count this merge. */
7995 /* Cut the list in two pieces by stepping INSIZE places
7996 forward in the list, starting from P. */
7999 for (i
= 0; i
< insize
; i
++)
8008 /* Now we have two lists. Merge them! */
8009 while (psize
> 0 || (qsize
> 0 && q
!= NULL
))
8011 /* See from which the next case to merge comes from. */
8014 /* P is empty so the next case must come from Q. */
8019 else if (qsize
== 0 || q
== NULL
)
8028 cmp
= compare_cases (p
, q
);
8031 /* The whole case range for P is less than the
8039 /* The whole case range for Q is greater than
8040 the case range for P. */
8047 /* The cases overlap, or they are the same
8048 element in the list. Either way, we must
8049 issue an error and get the next case from P. */
8050 /* FIXME: Sort P and Q by line number. */
8051 gfc_error ("CASE label at %L overlaps with CASE "
8052 "label at %L", &p
->where
, &q
->where
);
8060 /* Add the next element to the merged list. */
8069 /* P has now stepped INSIZE places along, and so has Q. So
8070 they're the same. */
8075 /* If we have done only one merge or none at all, we've
8076 finished sorting the cases. */
8085 /* Otherwise repeat, merging lists twice the size. */
8091 /* Check to see if an expression is suitable for use in a CASE statement.
8092 Makes sure that all case expressions are scalar constants of the same
8093 type. Return false if anything is wrong. */
8096 validate_case_label_expr (gfc_expr
*e
, gfc_expr
*case_expr
)
8098 if (e
== NULL
) return true;
8100 if (e
->ts
.type
!= case_expr
->ts
.type
)
8102 gfc_error ("Expression in CASE statement at %L must be of type %s",
8103 &e
->where
, gfc_basic_typename (case_expr
->ts
.type
));
8107 /* C805 (R808) For a given case-construct, each case-value shall be of
8108 the same type as case-expr. For character type, length differences
8109 are allowed, but the kind type parameters shall be the same. */
8111 if (case_expr
->ts
.type
== BT_CHARACTER
&& e
->ts
.kind
!= case_expr
->ts
.kind
)
8113 gfc_error ("Expression in CASE statement at %L must be of kind %d",
8114 &e
->where
, case_expr
->ts
.kind
);
8118 /* Convert the case value kind to that of case expression kind,
8121 if (e
->ts
.kind
!= case_expr
->ts
.kind
)
8122 gfc_convert_type_warn (e
, &case_expr
->ts
, 2, 0);
8126 gfc_error ("Expression in CASE statement at %L must be scalar",
8135 /* Given a completely parsed select statement, we:
8137 - Validate all expressions and code within the SELECT.
8138 - Make sure that the selection expression is not of the wrong type.
8139 - Make sure that no case ranges overlap.
8140 - Eliminate unreachable cases and unreachable code resulting from
8141 removing case labels.
8143 The standard does allow unreachable cases, e.g. CASE (5:3). But
8144 they are a hassle for code generation, and to prevent that, we just
8145 cut them out here. This is not necessary for overlapping cases
8146 because they are illegal and we never even try to generate code.
8148 We have the additional caveat that a SELECT construct could have
8149 been a computed GOTO in the source code. Fortunately we can fairly
8150 easily work around that here: The case_expr for a "real" SELECT CASE
8151 is in code->expr1, but for a computed GOTO it is in code->expr2. All
8152 we have to do is make sure that the case_expr is a scalar integer
8156 resolve_select (gfc_code
*code
, bool select_type
)
8159 gfc_expr
*case_expr
;
8160 gfc_case
*cp
, *default_case
, *tail
, *head
;
8161 int seen_unreachable
;
8167 if (code
->expr1
== NULL
)
8169 /* This was actually a computed GOTO statement. */
8170 case_expr
= code
->expr2
;
8171 if (case_expr
->ts
.type
!= BT_INTEGER
|| case_expr
->rank
!= 0)
8172 gfc_error ("Selection expression in computed GOTO statement "
8173 "at %L must be a scalar integer expression",
8176 /* Further checking is not necessary because this SELECT was built
8177 by the compiler, so it should always be OK. Just move the
8178 case_expr from expr2 to expr so that we can handle computed
8179 GOTOs as normal SELECTs from here on. */
8180 code
->expr1
= code
->expr2
;
8185 case_expr
= code
->expr1
;
8186 type
= case_expr
->ts
.type
;
8189 if (type
!= BT_LOGICAL
&& type
!= BT_INTEGER
&& type
!= BT_CHARACTER
)
8191 gfc_error ("Argument of SELECT statement at %L cannot be %s",
8192 &case_expr
->where
, gfc_typename (&case_expr
->ts
));
8194 /* Punt. Going on here just produce more garbage error messages. */
8199 if (!select_type
&& case_expr
->rank
!= 0)
8201 gfc_error ("Argument of SELECT statement at %L must be a scalar "
8202 "expression", &case_expr
->where
);
8208 /* Raise a warning if an INTEGER case value exceeds the range of
8209 the case-expr. Later, all expressions will be promoted to the
8210 largest kind of all case-labels. */
8212 if (type
== BT_INTEGER
)
8213 for (body
= code
->block
; body
; body
= body
->block
)
8214 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8217 && gfc_check_integer_range (cp
->low
->value
.integer
,
8218 case_expr
->ts
.kind
) != ARITH_OK
)
8219 gfc_warning (0, "Expression in CASE statement at %L is "
8220 "not in the range of %s", &cp
->low
->where
,
8221 gfc_typename (&case_expr
->ts
));
8224 && cp
->low
!= cp
->high
8225 && gfc_check_integer_range (cp
->high
->value
.integer
,
8226 case_expr
->ts
.kind
) != ARITH_OK
)
8227 gfc_warning (0, "Expression in CASE statement at %L is "
8228 "not in the range of %s", &cp
->high
->where
,
8229 gfc_typename (&case_expr
->ts
));
8232 /* PR 19168 has a long discussion concerning a mismatch of the kinds
8233 of the SELECT CASE expression and its CASE values. Walk the lists
8234 of case values, and if we find a mismatch, promote case_expr to
8235 the appropriate kind. */
8237 if (type
== BT_LOGICAL
|| type
== BT_INTEGER
)
8239 for (body
= code
->block
; body
; body
= body
->block
)
8241 /* Walk the case label list. */
8242 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8244 /* Intercept the DEFAULT case. It does not have a kind. */
8245 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8248 /* Unreachable case ranges are discarded, so ignore. */
8249 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8250 && cp
->low
!= cp
->high
8251 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8255 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->low
))
8256 gfc_convert_type_warn (case_expr
, &cp
->low
->ts
, 2, 0);
8258 if (cp
->high
!= NULL
8259 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->high
))
8260 gfc_convert_type_warn (case_expr
, &cp
->high
->ts
, 2, 0);
8265 /* Assume there is no DEFAULT case. */
8266 default_case
= NULL
;
8271 for (body
= code
->block
; body
; body
= body
->block
)
8273 /* Assume the CASE list is OK, and all CASE labels can be matched. */
8275 seen_unreachable
= 0;
8277 /* Walk the case label list, making sure that all case labels
8279 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8281 /* Count the number of cases in the whole construct. */
8284 /* Intercept the DEFAULT case. */
8285 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8287 if (default_case
!= NULL
)
8289 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8290 "by a second DEFAULT CASE at %L",
8291 &default_case
->where
, &cp
->where
);
8302 /* Deal with single value cases and case ranges. Errors are
8303 issued from the validation function. */
8304 if (!validate_case_label_expr (cp
->low
, case_expr
)
8305 || !validate_case_label_expr (cp
->high
, case_expr
))
8311 if (type
== BT_LOGICAL
8312 && ((cp
->low
== NULL
|| cp
->high
== NULL
)
8313 || cp
->low
!= cp
->high
))
8315 gfc_error ("Logical range in CASE statement at %L is not "
8316 "allowed", &cp
->low
->where
);
8321 if (type
== BT_LOGICAL
&& cp
->low
->expr_type
== EXPR_CONSTANT
)
8324 value
= cp
->low
->value
.logical
== 0 ? 2 : 1;
8325 if (value
& seen_logical
)
8327 gfc_error ("Constant logical value in CASE statement "
8328 "is repeated at %L",
8333 seen_logical
|= value
;
8336 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8337 && cp
->low
!= cp
->high
8338 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8340 if (warn_surprising
)
8341 gfc_warning (OPT_Wsurprising
,
8342 "Range specification at %L can never be matched",
8345 cp
->unreachable
= 1;
8346 seen_unreachable
= 1;
8350 /* If the case range can be matched, it can also overlap with
8351 other cases. To make sure it does not, we put it in a
8352 double linked list here. We sort that with a merge sort
8353 later on to detect any overlapping cases. */
8357 head
->right
= head
->left
= NULL
;
8362 tail
->right
->left
= tail
;
8369 /* It there was a failure in the previous case label, give up
8370 for this case label list. Continue with the next block. */
8374 /* See if any case labels that are unreachable have been seen.
8375 If so, we eliminate them. This is a bit of a kludge because
8376 the case lists for a single case statement (label) is a
8377 single forward linked lists. */
8378 if (seen_unreachable
)
8380 /* Advance until the first case in the list is reachable. */
8381 while (body
->ext
.block
.case_list
!= NULL
8382 && body
->ext
.block
.case_list
->unreachable
)
8384 gfc_case
*n
= body
->ext
.block
.case_list
;
8385 body
->ext
.block
.case_list
= body
->ext
.block
.case_list
->next
;
8387 gfc_free_case_list (n
);
8390 /* Strip all other unreachable cases. */
8391 if (body
->ext
.block
.case_list
)
8393 for (cp
= body
->ext
.block
.case_list
; cp
&& cp
->next
; cp
= cp
->next
)
8395 if (cp
->next
->unreachable
)
8397 gfc_case
*n
= cp
->next
;
8398 cp
->next
= cp
->next
->next
;
8400 gfc_free_case_list (n
);
8407 /* See if there were overlapping cases. If the check returns NULL,
8408 there was overlap. In that case we don't do anything. If head
8409 is non-NULL, we prepend the DEFAULT case. The sorted list can
8410 then used during code generation for SELECT CASE constructs with
8411 a case expression of a CHARACTER type. */
8414 head
= check_case_overlap (head
);
8416 /* Prepend the default_case if it is there. */
8417 if (head
!= NULL
&& default_case
)
8419 default_case
->left
= NULL
;
8420 default_case
->right
= head
;
8421 head
->left
= default_case
;
8425 /* Eliminate dead blocks that may be the result if we've seen
8426 unreachable case labels for a block. */
8427 for (body
= code
; body
&& body
->block
; body
= body
->block
)
8429 if (body
->block
->ext
.block
.case_list
== NULL
)
8431 /* Cut the unreachable block from the code chain. */
8432 gfc_code
*c
= body
->block
;
8433 body
->block
= c
->block
;
8435 /* Kill the dead block, but not the blocks below it. */
8437 gfc_free_statements (c
);
8441 /* More than two cases is legal but insane for logical selects.
8442 Issue a warning for it. */
8443 if (warn_surprising
&& type
== BT_LOGICAL
&& ncases
> 2)
8444 gfc_warning (OPT_Wsurprising
,
8445 "Logical SELECT CASE block at %L has more that two cases",
8450 /* Check if a derived type is extensible. */
8453 gfc_type_is_extensible (gfc_symbol
*sym
)
8455 return !(sym
->attr
.is_bind_c
|| sym
->attr
.sequence
8456 || (sym
->attr
.is_class
8457 && sym
->components
->ts
.u
.derived
->attr
.unlimited_polymorphic
));
8462 resolve_types (gfc_namespace
*ns
);
8464 /* Resolve an associate-name: Resolve target and ensure the type-spec is
8465 correct as well as possibly the array-spec. */
8468 resolve_assoc_var (gfc_symbol
* sym
, bool resolve_target
)
8472 gcc_assert (sym
->assoc
);
8473 gcc_assert (sym
->attr
.flavor
== FL_VARIABLE
);
8475 /* If this is for SELECT TYPE, the target may not yet be set. In that
8476 case, return. Resolution will be called later manually again when
8478 target
= sym
->assoc
->target
;
8481 gcc_assert (!sym
->assoc
->dangling
);
8483 if (resolve_target
&& !gfc_resolve_expr (target
))
8486 /* For variable targets, we get some attributes from the target. */
8487 if (target
->expr_type
== EXPR_VARIABLE
)
8491 gcc_assert (target
->symtree
);
8492 tsym
= target
->symtree
->n
.sym
;
8494 sym
->attr
.asynchronous
= tsym
->attr
.asynchronous
;
8495 sym
->attr
.volatile_
= tsym
->attr
.volatile_
;
8497 sym
->attr
.target
= tsym
->attr
.target
8498 || gfc_expr_attr (target
).pointer
;
8499 if (is_subref_array (target
))
8500 sym
->attr
.subref_array_pointer
= 1;
8503 if (target
->expr_type
== EXPR_NULL
)
8505 gfc_error ("Selector at %L cannot be NULL()", &target
->where
);
8508 else if (target
->ts
.type
== BT_UNKNOWN
)
8510 gfc_error ("Selector at %L has no type", &target
->where
);
8514 /* Get type if this was not already set. Note that it can be
8515 some other type than the target in case this is a SELECT TYPE
8516 selector! So we must not update when the type is already there. */
8517 if (sym
->ts
.type
== BT_UNKNOWN
)
8518 sym
->ts
= target
->ts
;
8520 gcc_assert (sym
->ts
.type
!= BT_UNKNOWN
);
8522 /* See if this is a valid association-to-variable. */
8523 sym
->assoc
->variable
= (target
->expr_type
== EXPR_VARIABLE
8524 && !gfc_has_vector_subscript (target
));
8526 /* Finally resolve if this is an array or not. */
8527 if (sym
->attr
.dimension
&& target
->rank
== 0)
8529 /* primary.c makes the assumption that a reference to an associate
8530 name followed by a left parenthesis is an array reference. */
8531 if (sym
->ts
.type
!= BT_CHARACTER
)
8532 gfc_error ("Associate-name %qs at %L is used as array",
8533 sym
->name
, &sym
->declared_at
);
8534 sym
->attr
.dimension
= 0;
8539 /* We cannot deal with class selectors that need temporaries. */
8540 if (target
->ts
.type
== BT_CLASS
8541 && gfc_ref_needs_temporary_p (target
->ref
))
8543 gfc_error ("CLASS selector at %L needs a temporary which is not "
8544 "yet implemented", &target
->where
);
8548 if (target
->ts
.type
== BT_CLASS
)
8549 gfc_fix_class_refs (target
);
8551 if (target
->rank
!= 0)
8554 /* The rank may be incorrectly guessed at parsing, therefore make sure
8555 it is corrected now. */
8556 if (sym
->ts
.type
!= BT_CLASS
&& (!sym
->as
|| sym
->assoc
->rankguessed
))
8559 sym
->as
= gfc_get_array_spec ();
8561 as
->rank
= target
->rank
;
8562 as
->type
= AS_DEFERRED
;
8563 as
->corank
= gfc_get_corank (target
);
8564 sym
->attr
.dimension
= 1;
8565 if (as
->corank
!= 0)
8566 sym
->attr
.codimension
= 1;
8571 /* target's rank is 0, but the type of the sym is still array valued,
8572 which has to be corrected. */
8573 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)
8576 symbol_attribute attr
;
8577 /* The associated variable's type is still the array type
8578 correct this now. */
8579 gfc_typespec
*ts
= &target
->ts
;
8582 for (ref
= target
->ref
; ref
!= NULL
; ref
= ref
->next
)
8587 ts
= &ref
->u
.c
.component
->ts
;
8590 if (ts
->type
== BT_CLASS
)
8591 ts
= &ts
->u
.derived
->components
->ts
;
8597 /* Create a scalar instance of the current class type. Because the
8598 rank of a class array goes into its name, the type has to be
8599 rebuild. The alternative of (re-)setting just the attributes
8600 and as in the current type, destroys the type also in other
8604 sym
->ts
.type
= BT_CLASS
;
8605 attr
= CLASS_DATA (sym
)->attr
;
8607 attr
.associate_var
= 1;
8608 attr
.dimension
= attr
.codimension
= 0;
8609 attr
.class_pointer
= 1;
8610 if (!gfc_build_class_symbol (&sym
->ts
, &attr
, &as
))
8612 /* Make sure the _vptr is set. */
8613 c
= gfc_find_component (sym
->ts
.u
.derived
, "_vptr", true, true, NULL
);
8614 if (c
->ts
.u
.derived
== NULL
)
8615 c
->ts
.u
.derived
= gfc_find_derived_vtab (sym
->ts
.u
.derived
);
8616 CLASS_DATA (sym
)->attr
.pointer
= 1;
8617 CLASS_DATA (sym
)->attr
.class_pointer
= 1;
8618 gfc_set_sym_referenced (sym
->ts
.u
.derived
);
8619 gfc_commit_symbol (sym
->ts
.u
.derived
);
8620 /* _vptr now has the _vtab in it, change it to the _vtype. */
8621 if (c
->ts
.u
.derived
->attr
.vtab
)
8622 c
->ts
.u
.derived
= c
->ts
.u
.derived
->ts
.u
.derived
;
8623 c
->ts
.u
.derived
->ns
->types_resolved
= 0;
8624 resolve_types (c
->ts
.u
.derived
->ns
);
8628 /* Mark this as an associate variable. */
8629 sym
->attr
.associate_var
= 1;
8631 /* Fix up the type-spec for CHARACTER types. */
8632 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.select_type_temporary
)
8635 sym
->ts
.u
.cl
= target
->ts
.u
.cl
;
8637 if (!sym
->ts
.u
.cl
->length
&& !sym
->ts
.deferred
)
8639 if (target
->expr_type
== EXPR_CONSTANT
)
8640 sym
->ts
.u
.cl
->length
=
8641 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
8642 target
->value
.character
.length
);
8644 gfc_error ("Not Implemented: Associate target with type character"
8645 " and non-constant length at %L", &target
->where
);
8649 /* If the target is a good class object, so is the associate variable. */
8650 if (sym
->ts
.type
== BT_CLASS
&& gfc_expr_attr (target
).class_ok
)
8651 sym
->attr
.class_ok
= 1;
8655 /* Ensure that SELECT TYPE expressions have the correct rank and a full
8656 array reference, where necessary. The symbols are artificial and so
8657 the dimension attribute and arrayspec can also be set. In addition,
8658 sometimes the expr1 arrives as BT_DERIVED, when the symbol is BT_CLASS.
8659 This is corrected here as well.*/
8662 fixup_array_ref (gfc_expr
**expr1
, gfc_expr
*expr2
,
8663 int rank
, gfc_ref
*ref
)
8665 gfc_ref
*nref
= (*expr1
)->ref
;
8666 gfc_symbol
*sym1
= (*expr1
)->symtree
->n
.sym
;
8667 gfc_symbol
*sym2
= expr2
? expr2
->symtree
->n
.sym
: NULL
;
8668 (*expr1
)->rank
= rank
;
8669 if (sym1
->ts
.type
== BT_CLASS
)
8671 if ((*expr1
)->ts
.type
!= BT_CLASS
)
8672 (*expr1
)->ts
= sym1
->ts
;
8674 CLASS_DATA (sym1
)->attr
.dimension
= 1;
8675 if (CLASS_DATA (sym1
)->as
== NULL
&& sym2
)
8676 CLASS_DATA (sym1
)->as
8677 = gfc_copy_array_spec (CLASS_DATA (sym2
)->as
);
8681 sym1
->attr
.dimension
= 1;
8682 if (sym1
->as
== NULL
&& sym2
)
8683 sym1
->as
= gfc_copy_array_spec (sym2
->as
);
8686 for (; nref
; nref
= nref
->next
)
8687 if (nref
->next
== NULL
)
8690 if (ref
&& nref
&& nref
->type
!= REF_ARRAY
)
8691 nref
->next
= gfc_copy_ref (ref
);
8692 else if (ref
&& !nref
)
8693 (*expr1
)->ref
= gfc_copy_ref (ref
);
8698 build_loc_call (gfc_expr
*sym_expr
)
8701 loc_call
= gfc_get_expr ();
8702 loc_call
->expr_type
= EXPR_FUNCTION
;
8703 gfc_get_sym_tree ("loc", gfc_current_ns
, &loc_call
->symtree
, false);
8704 loc_call
->symtree
->n
.sym
->attr
.flavor
= FL_PROCEDURE
;
8705 loc_call
->symtree
->n
.sym
->attr
.intrinsic
= 1;
8706 loc_call
->symtree
->n
.sym
->result
= loc_call
->symtree
->n
.sym
;
8707 gfc_commit_symbol (loc_call
->symtree
->n
.sym
);
8708 loc_call
->ts
.type
= BT_INTEGER
;
8709 loc_call
->ts
.kind
= gfc_index_integer_kind
;
8710 loc_call
->value
.function
.isym
= gfc_intrinsic_function_by_id (GFC_ISYM_LOC
);
8711 loc_call
->value
.function
.actual
= gfc_get_actual_arglist ();
8712 loc_call
->value
.function
.actual
->expr
= sym_expr
;
8713 loc_call
->where
= sym_expr
->where
;
8717 /* Resolve a SELECT TYPE statement. */
8720 resolve_select_type (gfc_code
*code
, gfc_namespace
*old_ns
)
8722 gfc_symbol
*selector_type
;
8723 gfc_code
*body
, *new_st
, *if_st
, *tail
;
8724 gfc_code
*class_is
= NULL
, *default_case
= NULL
;
8727 char name
[GFC_MAX_SYMBOL_LEN
];
8731 gfc_ref
* ref
= NULL
;
8732 gfc_expr
*selector_expr
= NULL
;
8734 ns
= code
->ext
.block
.ns
;
8737 /* Check for F03:C813. */
8738 if (code
->expr1
->ts
.type
!= BT_CLASS
8739 && !(code
->expr2
&& code
->expr2
->ts
.type
== BT_CLASS
))
8741 gfc_error ("Selector shall be polymorphic in SELECT TYPE statement "
8742 "at %L", &code
->loc
);
8746 if (!code
->expr1
->symtree
->n
.sym
->attr
.class_ok
)
8751 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
8752 code
->expr1
->symtree
->n
.sym
->ts
= code
->expr2
->ts
;
8753 selector_type
= CLASS_DATA (code
->expr2
)->ts
.u
.derived
;
8755 if (code
->expr2
->rank
&& CLASS_DATA (code
->expr1
)->as
)
8756 CLASS_DATA (code
->expr1
)->as
->rank
= code
->expr2
->rank
;
8758 /* F2008: C803 The selector expression must not be coindexed. */
8759 if (gfc_is_coindexed (code
->expr2
))
8761 gfc_error ("Selector at %L must not be coindexed",
8762 &code
->expr2
->where
);
8769 selector_type
= CLASS_DATA (code
->expr1
)->ts
.u
.derived
;
8771 if (gfc_is_coindexed (code
->expr1
))
8773 gfc_error ("Selector at %L must not be coindexed",
8774 &code
->expr1
->where
);
8779 /* Loop over TYPE IS / CLASS IS cases. */
8780 for (body
= code
->block
; body
; body
= body
->block
)
8782 c
= body
->ext
.block
.case_list
;
8786 /* Check for repeated cases. */
8787 for (tail
= code
->block
; tail
; tail
= tail
->block
)
8789 gfc_case
*d
= tail
->ext
.block
.case_list
;
8793 if (c
->ts
.type
== d
->ts
.type
8794 && ((c
->ts
.type
== BT_DERIVED
8795 && c
->ts
.u
.derived
&& d
->ts
.u
.derived
8796 && !strcmp (c
->ts
.u
.derived
->name
,
8797 d
->ts
.u
.derived
->name
))
8798 || c
->ts
.type
== BT_UNKNOWN
8799 || (!(c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8800 && c
->ts
.kind
== d
->ts
.kind
)))
8802 gfc_error ("TYPE IS at %L overlaps with TYPE IS at %L",
8803 &c
->where
, &d
->where
);
8809 /* Check F03:C815. */
8810 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8811 && !selector_type
->attr
.unlimited_polymorphic
8812 && !gfc_type_is_extensible (c
->ts
.u
.derived
))
8814 gfc_error ("Derived type %qs at %L must be extensible",
8815 c
->ts
.u
.derived
->name
, &c
->where
);
8820 /* Check F03:C816. */
8821 if (c
->ts
.type
!= BT_UNKNOWN
&& !selector_type
->attr
.unlimited_polymorphic
8822 && ((c
->ts
.type
!= BT_DERIVED
&& c
->ts
.type
!= BT_CLASS
)
8823 || !gfc_type_is_extension_of (selector_type
, c
->ts
.u
.derived
)))
8825 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8826 gfc_error ("Derived type %qs at %L must be an extension of %qs",
8827 c
->ts
.u
.derived
->name
, &c
->where
, selector_type
->name
);
8829 gfc_error ("Unexpected intrinsic type %qs at %L",
8830 gfc_basic_typename (c
->ts
.type
), &c
->where
);
8835 /* Check F03:C814. */
8836 if (c
->ts
.type
== BT_CHARACTER
8837 && (c
->ts
.u
.cl
->length
!= NULL
|| c
->ts
.deferred
))
8839 gfc_error ("The type-spec at %L shall specify that each length "
8840 "type parameter is assumed", &c
->where
);
8845 /* Intercept the DEFAULT case. */
8846 if (c
->ts
.type
== BT_UNKNOWN
)
8848 /* Check F03:C818. */
8851 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8852 "by a second DEFAULT CASE at %L",
8853 &default_case
->ext
.block
.case_list
->where
, &c
->where
);
8858 default_case
= body
;
8865 /* Transform SELECT TYPE statement to BLOCK and associate selector to
8866 target if present. If there are any EXIT statements referring to the
8867 SELECT TYPE construct, this is no problem because the gfc_code
8868 reference stays the same and EXIT is equally possible from the BLOCK
8869 it is changed to. */
8870 code
->op
= EXEC_BLOCK
;
8873 gfc_association_list
* assoc
;
8875 assoc
= gfc_get_association_list ();
8876 assoc
->st
= code
->expr1
->symtree
;
8877 assoc
->target
= gfc_copy_expr (code
->expr2
);
8878 assoc
->target
->where
= code
->expr2
->where
;
8879 /* assoc->variable will be set by resolve_assoc_var. */
8881 code
->ext
.block
.assoc
= assoc
;
8882 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
8884 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
8887 code
->ext
.block
.assoc
= NULL
;
8889 /* Ensure that the selector rank and arrayspec are available to
8890 correct expressions in which they might be missing. */
8891 if (code
->expr2
&& code
->expr2
->rank
)
8893 rank
= code
->expr2
->rank
;
8894 for (ref
= code
->expr2
->ref
; ref
; ref
= ref
->next
)
8895 if (ref
->next
== NULL
)
8897 if (ref
&& ref
->type
== REF_ARRAY
)
8898 ref
= gfc_copy_ref (ref
);
8900 /* Fixup expr1 if necessary. */
8902 fixup_array_ref (&code
->expr1
, code
->expr2
, rank
, ref
);
8904 else if (code
->expr1
->rank
)
8906 rank
= code
->expr1
->rank
;
8907 for (ref
= code
->expr1
->ref
; ref
; ref
= ref
->next
)
8908 if (ref
->next
== NULL
)
8910 if (ref
&& ref
->type
== REF_ARRAY
)
8911 ref
= gfc_copy_ref (ref
);
8914 /* Add EXEC_SELECT to switch on type. */
8915 new_st
= gfc_get_code (code
->op
);
8916 new_st
->expr1
= code
->expr1
;
8917 new_st
->expr2
= code
->expr2
;
8918 new_st
->block
= code
->block
;
8919 code
->expr1
= code
->expr2
= NULL
;
8924 ns
->code
->next
= new_st
;
8926 code
->op
= EXEC_SELECT_TYPE
;
8928 /* Use the intrinsic LOC function to generate an integer expression
8929 for the vtable of the selector. Note that the rank of the selector
8930 expression has to be set to zero. */
8931 gfc_add_vptr_component (code
->expr1
);
8932 code
->expr1
->rank
= 0;
8933 code
->expr1
= build_loc_call (code
->expr1
);
8934 selector_expr
= code
->expr1
->value
.function
.actual
->expr
;
8936 /* Loop over TYPE IS / CLASS IS cases. */
8937 for (body
= code
->block
; body
; body
= body
->block
)
8941 c
= body
->ext
.block
.case_list
;
8943 /* Generate an index integer expression for address of the
8944 TYPE/CLASS vtable and store it in c->low. The hash expression
8945 is stored in c->high and is used to resolve intrinsic cases. */
8946 if (c
->ts
.type
!= BT_UNKNOWN
)
8948 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8950 vtab
= gfc_find_derived_vtab (c
->ts
.u
.derived
);
8952 c
->high
= gfc_get_int_expr (gfc_default_integer_kind
, NULL
,
8953 c
->ts
.u
.derived
->hash_value
);
8957 vtab
= gfc_find_vtab (&c
->ts
);
8958 gcc_assert (vtab
&& CLASS_DATA (vtab
)->initializer
);
8959 e
= CLASS_DATA (vtab
)->initializer
;
8960 c
->high
= gfc_copy_expr (e
);
8963 e
= gfc_lval_expr_from_sym (vtab
);
8964 c
->low
= build_loc_call (e
);
8969 /* Associate temporary to selector. This should only be done
8970 when this case is actually true, so build a new ASSOCIATE
8971 that does precisely this here (instead of using the
8974 if (c
->ts
.type
== BT_CLASS
)
8975 sprintf (name
, "__tmp_class_%s", c
->ts
.u
.derived
->name
);
8976 else if (c
->ts
.type
== BT_DERIVED
)
8977 sprintf (name
, "__tmp_type_%s", c
->ts
.u
.derived
->name
);
8978 else if (c
->ts
.type
== BT_CHARACTER
)
8980 HOST_WIDE_INT charlen
= 0;
8981 if (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
8982 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
8983 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
8984 snprintf (name
, sizeof (name
),
8985 "__tmp_%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
8986 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
8989 sprintf (name
, "__tmp_%s_%d", gfc_basic_typename (c
->ts
.type
),
8992 st
= gfc_find_symtree (ns
->sym_root
, name
);
8993 gcc_assert (st
->n
.sym
->assoc
);
8994 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
8995 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
8996 if (c
->ts
.type
!= BT_CLASS
&& c
->ts
.type
!= BT_UNKNOWN
)
8998 gfc_add_data_component (st
->n
.sym
->assoc
->target
);
8999 /* Fixup the target expression if necessary. */
9001 fixup_array_ref (&st
->n
.sym
->assoc
->target
, NULL
, rank
, ref
);
9004 new_st
= gfc_get_code (EXEC_BLOCK
);
9005 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9006 new_st
->ext
.block
.ns
->code
= body
->next
;
9007 body
->next
= new_st
;
9009 /* Chain in the new list only if it is marked as dangling. Otherwise
9010 there is a CASE label overlap and this is already used. Just ignore,
9011 the error is diagnosed elsewhere. */
9012 if (st
->n
.sym
->assoc
->dangling
)
9014 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9015 st
->n
.sym
->assoc
->dangling
= 0;
9018 resolve_assoc_var (st
->n
.sym
, false);
9021 /* Take out CLASS IS cases for separate treatment. */
9023 while (body
&& body
->block
)
9025 if (body
->block
->ext
.block
.case_list
->ts
.type
== BT_CLASS
)
9027 /* Add to class_is list. */
9028 if (class_is
== NULL
)
9030 class_is
= body
->block
;
9035 for (tail
= class_is
; tail
->block
; tail
= tail
->block
) ;
9036 tail
->block
= body
->block
;
9039 /* Remove from EXEC_SELECT list. */
9040 body
->block
= body
->block
->block
;
9053 /* Add a default case to hold the CLASS IS cases. */
9054 for (tail
= code
; tail
->block
; tail
= tail
->block
) ;
9055 tail
->block
= gfc_get_code (EXEC_SELECT_TYPE
);
9057 tail
->ext
.block
.case_list
= gfc_get_case ();
9058 tail
->ext
.block
.case_list
->ts
.type
= BT_UNKNOWN
;
9060 default_case
= tail
;
9063 /* More than one CLASS IS block? */
9064 if (class_is
->block
)
9068 /* Sort CLASS IS blocks by extension level. */
9072 for (c1
= &class_is
; (*c1
) && (*c1
)->block
; c1
= &((*c1
)->block
))
9075 /* F03:C817 (check for doubles). */
9076 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->hash_value
9077 == c2
->ext
.block
.case_list
->ts
.u
.derived
->hash_value
)
9079 gfc_error ("Double CLASS IS block in SELECT TYPE "
9081 &c2
->ext
.block
.case_list
->where
);
9084 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
9085 < c2
->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
)
9088 (*c1
)->block
= c2
->block
;
9098 /* Generate IF chain. */
9099 if_st
= gfc_get_code (EXEC_IF
);
9101 for (body
= class_is
; body
; body
= body
->block
)
9103 new_st
->block
= gfc_get_code (EXEC_IF
);
9104 new_st
= new_st
->block
;
9105 /* Set up IF condition: Call _gfortran_is_extension_of. */
9106 new_st
->expr1
= gfc_get_expr ();
9107 new_st
->expr1
->expr_type
= EXPR_FUNCTION
;
9108 new_st
->expr1
->ts
.type
= BT_LOGICAL
;
9109 new_st
->expr1
->ts
.kind
= 4;
9110 new_st
->expr1
->value
.function
.name
= gfc_get_string (PREFIX ("is_extension_of"));
9111 new_st
->expr1
->value
.function
.isym
= XCNEW (gfc_intrinsic_sym
);
9112 new_st
->expr1
->value
.function
.isym
->id
= GFC_ISYM_EXTENDS_TYPE_OF
;
9113 /* Set up arguments. */
9114 new_st
->expr1
->value
.function
.actual
= gfc_get_actual_arglist ();
9115 new_st
->expr1
->value
.function
.actual
->expr
= gfc_get_variable_expr (selector_expr
->symtree
);
9116 new_st
->expr1
->value
.function
.actual
->expr
->where
= code
->loc
;
9117 new_st
->expr1
->where
= code
->loc
;
9118 gfc_add_vptr_component (new_st
->expr1
->value
.function
.actual
->expr
);
9119 vtab
= gfc_find_derived_vtab (body
->ext
.block
.case_list
->ts
.u
.derived
);
9120 st
= gfc_find_symtree (vtab
->ns
->sym_root
, vtab
->name
);
9121 new_st
->expr1
->value
.function
.actual
->next
= gfc_get_actual_arglist ();
9122 new_st
->expr1
->value
.function
.actual
->next
->expr
= gfc_get_variable_expr (st
);
9123 new_st
->expr1
->value
.function
.actual
->next
->expr
->where
= code
->loc
;
9124 new_st
->next
= body
->next
;
9126 if (default_case
->next
)
9128 new_st
->block
= gfc_get_code (EXEC_IF
);
9129 new_st
= new_st
->block
;
9130 new_st
->next
= default_case
->next
;
9133 /* Replace CLASS DEFAULT code by the IF chain. */
9134 default_case
->next
= if_st
;
9137 /* Resolve the internal code. This can not be done earlier because
9138 it requires that the sym->assoc of selectors is set already. */
9139 gfc_current_ns
= ns
;
9140 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9141 gfc_current_ns
= old_ns
;
9148 /* Resolve a transfer statement. This is making sure that:
9149 -- a derived type being transferred has only non-pointer components
9150 -- a derived type being transferred doesn't have private components, unless
9151 it's being transferred from the module where the type was defined
9152 -- we're not trying to transfer a whole assumed size array. */
9155 resolve_transfer (gfc_code
*code
)
9158 gfc_symbol
*sym
, *derived
;
9162 bool formatted
= false;
9163 gfc_dt
*dt
= code
->ext
.dt
;
9164 gfc_symbol
*dtio_sub
= NULL
;
9168 while (exp
!= NULL
&& exp
->expr_type
== EXPR_OP
9169 && exp
->value
.op
.op
== INTRINSIC_PARENTHESES
)
9170 exp
= exp
->value
.op
.op1
;
9172 if (exp
&& exp
->expr_type
== EXPR_NULL
9175 gfc_error ("Invalid context for NULL () intrinsic at %L",
9180 if (exp
== NULL
|| (exp
->expr_type
!= EXPR_VARIABLE
9181 && exp
->expr_type
!= EXPR_FUNCTION
9182 && exp
->expr_type
!= EXPR_STRUCTURE
))
9185 /* If we are reading, the variable will be changed. Note that
9186 code->ext.dt may be NULL if the TRANSFER is related to
9187 an INQUIRE statement -- but in this case, we are not reading, either. */
9188 if (dt
&& dt
->dt_io_kind
->value
.iokind
== M_READ
9189 && !gfc_check_vardef_context (exp
, false, false, false,
9193 ts
= exp
->expr_type
== EXPR_STRUCTURE
? &exp
->ts
: &exp
->symtree
->n
.sym
->ts
;
9195 /* Go to actual component transferred. */
9196 for (ref
= exp
->ref
; ref
; ref
= ref
->next
)
9197 if (ref
->type
== REF_COMPONENT
)
9198 ts
= &ref
->u
.c
.component
->ts
;
9200 if (dt
&& dt
->dt_io_kind
->value
.iokind
!= M_INQUIRE
9201 && (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
))
9203 if (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
)
9204 derived
= ts
->u
.derived
;
9206 derived
= ts
->u
.derived
->components
->ts
.u
.derived
;
9208 /* Determine when to use the formatted DTIO procedure. */
9209 if (dt
&& (dt
->format_expr
|| dt
->format_label
))
9212 write
= dt
->dt_io_kind
->value
.iokind
== M_WRITE
9213 || dt
->dt_io_kind
->value
.iokind
== M_PRINT
;
9214 dtio_sub
= gfc_find_specific_dtio_proc (derived
, write
, formatted
);
9216 if (dtio_sub
!= NULL
&& exp
->expr_type
== EXPR_VARIABLE
)
9219 sym
= exp
->symtree
->n
.sym
->ns
->proc_name
;
9220 /* Check to see if this is a nested DTIO call, with the
9221 dummy as the io-list object. */
9222 if (sym
&& sym
== dtio_sub
&& sym
->formal
9223 && sym
->formal
->sym
== exp
->symtree
->n
.sym
9224 && exp
->ref
== NULL
)
9226 if (!sym
->attr
.recursive
)
9228 gfc_error ("DTIO %s procedure at %L must be recursive",
9229 sym
->name
, &sym
->declared_at
);
9236 if (ts
->type
== BT_CLASS
&& dtio_sub
== NULL
)
9238 gfc_error ("Data transfer element at %L cannot be polymorphic unless "
9239 "it is processed by a defined input/output procedure",
9244 if (ts
->type
== BT_DERIVED
)
9246 /* Check that transferred derived type doesn't contain POINTER
9247 components unless it is processed by a defined input/output
9249 if (ts
->u
.derived
->attr
.pointer_comp
&& dtio_sub
== NULL
)
9251 gfc_error ("Data transfer element at %L cannot have POINTER "
9252 "components unless it is processed by a defined "
9253 "input/output procedure", &code
->loc
);
9258 if (ts
->u
.derived
->attr
.proc_pointer_comp
)
9260 gfc_error ("Data transfer element at %L cannot have "
9261 "procedure pointer components", &code
->loc
);
9265 if (ts
->u
.derived
->attr
.alloc_comp
&& dtio_sub
== NULL
)
9267 gfc_error ("Data transfer element at %L cannot have ALLOCATABLE "
9268 "components unless it is processed by a defined "
9269 "input/output procedure", &code
->loc
);
9273 /* C_PTR and C_FUNPTR have private components which means they can not
9274 be printed. However, if -std=gnu and not -pedantic, allow
9275 the component to be printed to help debugging. */
9276 if (ts
->u
.derived
->ts
.f90_type
== BT_VOID
)
9278 if (!gfc_notify_std (GFC_STD_GNU
, "Data transfer element at %L "
9279 "cannot have PRIVATE components", &code
->loc
))
9282 else if (derived_inaccessible (ts
->u
.derived
) && dtio_sub
== NULL
)
9284 gfc_error ("Data transfer element at %L cannot have "
9285 "PRIVATE components unless it is processed by "
9286 "a defined input/output procedure", &code
->loc
);
9291 if (exp
->expr_type
== EXPR_STRUCTURE
)
9294 sym
= exp
->symtree
->n
.sym
;
9296 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SIZE
&& exp
->ref
9297 && exp
->ref
->type
== REF_ARRAY
&& exp
->ref
->u
.ar
.type
== AR_FULL
)
9299 gfc_error ("Data transfer element at %L cannot be a full reference to "
9300 "an assumed-size array", &code
->loc
);
9304 if (async_io_dt
&& exp
->expr_type
== EXPR_VARIABLE
)
9305 exp
->symtree
->n
.sym
->attr
.asynchronous
= 1;
9309 /*********** Toplevel code resolution subroutines ***********/
9311 /* Find the set of labels that are reachable from this block. We also
9312 record the last statement in each block. */
9315 find_reachable_labels (gfc_code
*block
)
9322 cs_base
->reachable_labels
= bitmap_alloc (&labels_obstack
);
9324 /* Collect labels in this block. We don't keep those corresponding
9325 to END {IF|SELECT}, these are checked in resolve_branch by going
9326 up through the code_stack. */
9327 for (c
= block
; c
; c
= c
->next
)
9329 if (c
->here
&& c
->op
!= EXEC_END_NESTED_BLOCK
)
9330 bitmap_set_bit (cs_base
->reachable_labels
, c
->here
->value
);
9333 /* Merge with labels from parent block. */
9336 gcc_assert (cs_base
->prev
->reachable_labels
);
9337 bitmap_ior_into (cs_base
->reachable_labels
,
9338 cs_base
->prev
->reachable_labels
);
9344 resolve_lock_unlock_event (gfc_code
*code
)
9346 if (code
->expr1
->expr_type
== EXPR_FUNCTION
9347 && code
->expr1
->value
.function
.isym
9348 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
9349 remove_caf_get_intrinsic (code
->expr1
);
9351 if ((code
->op
== EXEC_LOCK
|| code
->op
== EXEC_UNLOCK
)
9352 && (code
->expr1
->ts
.type
!= BT_DERIVED
9353 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9354 || code
->expr1
->ts
.u
.derived
->from_intmod
!= INTMOD_ISO_FORTRAN_ENV
9355 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
!= ISOFORTRAN_LOCK_TYPE
9356 || code
->expr1
->rank
!= 0
9357 || (!gfc_is_coarray (code
->expr1
) &&
9358 !gfc_is_coindexed (code
->expr1
))))
9359 gfc_error ("Lock variable at %L must be a scalar of type LOCK_TYPE",
9360 &code
->expr1
->where
);
9361 else if ((code
->op
== EXEC_EVENT_POST
|| code
->op
== EXEC_EVENT_WAIT
)
9362 && (code
->expr1
->ts
.type
!= BT_DERIVED
9363 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9364 || code
->expr1
->ts
.u
.derived
->from_intmod
9365 != INTMOD_ISO_FORTRAN_ENV
9366 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
9367 != ISOFORTRAN_EVENT_TYPE
9368 || code
->expr1
->rank
!= 0))
9369 gfc_error ("Event variable at %L must be a scalar of type EVENT_TYPE",
9370 &code
->expr1
->where
);
9371 else if (code
->op
== EXEC_EVENT_POST
&& !gfc_is_coarray (code
->expr1
)
9372 && !gfc_is_coindexed (code
->expr1
))
9373 gfc_error ("Event variable argument at %L must be a coarray or coindexed",
9374 &code
->expr1
->where
);
9375 else if (code
->op
== EXEC_EVENT_WAIT
&& !gfc_is_coarray (code
->expr1
))
9376 gfc_error ("Event variable argument at %L must be a coarray but not "
9377 "coindexed", &code
->expr1
->where
);
9381 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9382 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9383 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9384 &code
->expr2
->where
);
9387 && !gfc_check_vardef_context (code
->expr2
, false, false, false,
9388 _("STAT variable")))
9393 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9394 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9395 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9396 &code
->expr3
->where
);
9399 && !gfc_check_vardef_context (code
->expr3
, false, false, false,
9400 _("ERRMSG variable")))
9403 /* Check for LOCK the ACQUIRED_LOCK. */
9404 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9405 && (code
->expr4
->ts
.type
!= BT_LOGICAL
|| code
->expr4
->rank
!= 0
9406 || code
->expr4
->expr_type
!= EXPR_VARIABLE
))
9407 gfc_error ("ACQUIRED_LOCK= argument at %L must be a scalar LOGICAL "
9408 "variable", &code
->expr4
->where
);
9410 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9411 && !gfc_check_vardef_context (code
->expr4
, false, false, false,
9412 _("ACQUIRED_LOCK variable")))
9415 /* Check for EVENT WAIT the UNTIL_COUNT. */
9416 if (code
->op
== EXEC_EVENT_WAIT
&& code
->expr4
)
9418 if (!gfc_resolve_expr (code
->expr4
) || code
->expr4
->ts
.type
!= BT_INTEGER
9419 || code
->expr4
->rank
!= 0)
9420 gfc_error ("UNTIL_COUNT= argument at %L must be a scalar INTEGER "
9421 "expression", &code
->expr4
->where
);
9427 resolve_critical (gfc_code
*code
)
9429 gfc_symtree
*symtree
;
9430 gfc_symbol
*lock_type
;
9431 char name
[GFC_MAX_SYMBOL_LEN
];
9432 static int serial
= 0;
9434 if (flag_coarray
!= GFC_FCOARRAY_LIB
)
9437 symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
9438 GFC_PREFIX ("lock_type"));
9440 lock_type
= symtree
->n
.sym
;
9443 if (gfc_get_sym_tree (GFC_PREFIX ("lock_type"), gfc_current_ns
, &symtree
,
9446 lock_type
= symtree
->n
.sym
;
9447 lock_type
->attr
.flavor
= FL_DERIVED
;
9448 lock_type
->attr
.zero_comp
= 1;
9449 lock_type
->from_intmod
= INTMOD_ISO_FORTRAN_ENV
;
9450 lock_type
->intmod_sym_id
= ISOFORTRAN_LOCK_TYPE
;
9453 sprintf(name
, GFC_PREFIX ("lock_var") "%d",serial
++);
9454 if (gfc_get_sym_tree (name
, gfc_current_ns
, &symtree
, false) != 0)
9457 code
->resolved_sym
= symtree
->n
.sym
;
9458 symtree
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
9459 symtree
->n
.sym
->attr
.referenced
= 1;
9460 symtree
->n
.sym
->attr
.artificial
= 1;
9461 symtree
->n
.sym
->attr
.codimension
= 1;
9462 symtree
->n
.sym
->ts
.type
= BT_DERIVED
;
9463 symtree
->n
.sym
->ts
.u
.derived
= lock_type
;
9464 symtree
->n
.sym
->as
= gfc_get_array_spec ();
9465 symtree
->n
.sym
->as
->corank
= 1;
9466 symtree
->n
.sym
->as
->type
= AS_EXPLICIT
;
9467 symtree
->n
.sym
->as
->cotype
= AS_EXPLICIT
;
9468 symtree
->n
.sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
,
9470 gfc_commit_symbols();
9475 resolve_sync (gfc_code
*code
)
9477 /* Check imageset. The * case matches expr1 == NULL. */
9480 if (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
> 1)
9481 gfc_error ("Imageset argument at %L must be a scalar or rank-1 "
9482 "INTEGER expression", &code
->expr1
->where
);
9483 if (code
->expr1
->expr_type
== EXPR_CONSTANT
&& code
->expr1
->rank
== 0
9484 && mpz_cmp_si (code
->expr1
->value
.integer
, 1) < 0)
9485 gfc_error ("Imageset argument at %L must between 1 and num_images()",
9486 &code
->expr1
->where
);
9487 else if (code
->expr1
->expr_type
== EXPR_ARRAY
9488 && gfc_simplify_expr (code
->expr1
, 0))
9490 gfc_constructor
*cons
;
9491 cons
= gfc_constructor_first (code
->expr1
->value
.constructor
);
9492 for (; cons
; cons
= gfc_constructor_next (cons
))
9493 if (cons
->expr
->expr_type
== EXPR_CONSTANT
9494 && mpz_cmp_si (cons
->expr
->value
.integer
, 1) < 0)
9495 gfc_error ("Imageset argument at %L must between 1 and "
9496 "num_images()", &cons
->expr
->where
);
9502 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9503 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9504 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9505 &code
->expr2
->where
);
9509 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9510 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9511 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9512 &code
->expr3
->where
);
9516 /* Given a branch to a label, see if the branch is conforming.
9517 The code node describes where the branch is located. */
9520 resolve_branch (gfc_st_label
*label
, gfc_code
*code
)
9527 /* Step one: is this a valid branching target? */
9529 if (label
->defined
== ST_LABEL_UNKNOWN
)
9531 gfc_error ("Label %d referenced at %L is never defined", label
->value
,
9536 if (label
->defined
!= ST_LABEL_TARGET
&& label
->defined
!= ST_LABEL_DO_TARGET
)
9538 gfc_error ("Statement at %L is not a valid branch target statement "
9539 "for the branch statement at %L", &label
->where
, &code
->loc
);
9543 /* Step two: make sure this branch is not a branch to itself ;-) */
9545 if (code
->here
== label
)
9548 "Branch at %L may result in an infinite loop", &code
->loc
);
9552 /* Step three: See if the label is in the same block as the
9553 branching statement. The hard work has been done by setting up
9554 the bitmap reachable_labels. */
9556 if (bitmap_bit_p (cs_base
->reachable_labels
, label
->value
))
9558 /* Check now whether there is a CRITICAL construct; if so, check
9559 whether the label is still visible outside of the CRITICAL block,
9560 which is invalid. */
9561 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9563 if (stack
->current
->op
== EXEC_CRITICAL
9564 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9565 gfc_error ("GOTO statement at %L leaves CRITICAL construct for "
9566 "label at %L", &code
->loc
, &label
->where
);
9567 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
9568 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9569 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct "
9570 "for label at %L", &code
->loc
, &label
->where
);
9576 /* Step four: If we haven't found the label in the bitmap, it may
9577 still be the label of the END of the enclosing block, in which
9578 case we find it by going up the code_stack. */
9580 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9582 if (stack
->current
->next
&& stack
->current
->next
->here
== label
)
9584 if (stack
->current
->op
== EXEC_CRITICAL
)
9586 /* Note: A label at END CRITICAL does not leave the CRITICAL
9587 construct as END CRITICAL is still part of it. */
9588 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
9589 " at %L", &code
->loc
, &label
->where
);
9592 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
)
9594 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct for "
9595 "label at %L", &code
->loc
, &label
->where
);
9602 gcc_assert (stack
->current
->next
->op
== EXEC_END_NESTED_BLOCK
);
9606 /* The label is not in an enclosing block, so illegal. This was
9607 allowed in Fortran 66, so we allow it as extension. No
9608 further checks are necessary in this case. */
9609 gfc_notify_std (GFC_STD_LEGACY
, "Label at %L is not in the same block "
9610 "as the GOTO statement at %L", &label
->where
,
9616 /* Check whether EXPR1 has the same shape as EXPR2. */
9619 resolve_where_shape (gfc_expr
*expr1
, gfc_expr
*expr2
)
9621 mpz_t shape
[GFC_MAX_DIMENSIONS
];
9622 mpz_t shape2
[GFC_MAX_DIMENSIONS
];
9623 bool result
= false;
9626 /* Compare the rank. */
9627 if (expr1
->rank
!= expr2
->rank
)
9630 /* Compare the size of each dimension. */
9631 for (i
=0; i
<expr1
->rank
; i
++)
9633 if (!gfc_array_dimen_size (expr1
, i
, &shape
[i
]))
9636 if (!gfc_array_dimen_size (expr2
, i
, &shape2
[i
]))
9639 if (mpz_cmp (shape
[i
], shape2
[i
]))
9643 /* When either of the two expression is an assumed size array, we
9644 ignore the comparison of dimension sizes. */
9649 gfc_clear_shape (shape
, i
);
9650 gfc_clear_shape (shape2
, i
);
9655 /* Check whether a WHERE assignment target or a WHERE mask expression
9656 has the same shape as the outmost WHERE mask expression. */
9659 resolve_where (gfc_code
*code
, gfc_expr
*mask
)
9665 cblock
= code
->block
;
9667 /* Store the first WHERE mask-expr of the WHERE statement or construct.
9668 In case of nested WHERE, only the outmost one is stored. */
9669 if (mask
== NULL
) /* outmost WHERE */
9671 else /* inner WHERE */
9678 /* Check if the mask-expr has a consistent shape with the
9679 outmost WHERE mask-expr. */
9680 if (!resolve_where_shape (cblock
->expr1
, e
))
9681 gfc_error ("WHERE mask at %L has inconsistent shape",
9682 &cblock
->expr1
->where
);
9685 /* the assignment statement of a WHERE statement, or the first
9686 statement in where-body-construct of a WHERE construct */
9687 cnext
= cblock
->next
;
9692 /* WHERE assignment statement */
9695 /* Check shape consistent for WHERE assignment target. */
9696 if (e
&& !resolve_where_shape (cnext
->expr1
, e
))
9697 gfc_error ("WHERE assignment target at %L has "
9698 "inconsistent shape", &cnext
->expr1
->where
);
9702 case EXEC_ASSIGN_CALL
:
9703 resolve_call (cnext
);
9704 if (!cnext
->resolved_sym
->attr
.elemental
)
9705 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9706 &cnext
->ext
.actual
->expr
->where
);
9709 /* WHERE or WHERE construct is part of a where-body-construct */
9711 resolve_where (cnext
, e
);
9715 gfc_error ("Unsupported statement inside WHERE at %L",
9718 /* the next statement within the same where-body-construct */
9719 cnext
= cnext
->next
;
9721 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
9722 cblock
= cblock
->block
;
9727 /* Resolve assignment in FORALL construct.
9728 NVAR is the number of FORALL index variables, and VAR_EXPR records the
9729 FORALL index variables. */
9732 gfc_resolve_assign_in_forall (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
9736 for (n
= 0; n
< nvar
; n
++)
9738 gfc_symbol
*forall_index
;
9740 forall_index
= var_expr
[n
]->symtree
->n
.sym
;
9742 /* Check whether the assignment target is one of the FORALL index
9744 if ((code
->expr1
->expr_type
== EXPR_VARIABLE
)
9745 && (code
->expr1
->symtree
->n
.sym
== forall_index
))
9746 gfc_error ("Assignment to a FORALL index variable at %L",
9747 &code
->expr1
->where
);
9750 /* If one of the FORALL index variables doesn't appear in the
9751 assignment variable, then there could be a many-to-one
9752 assignment. Emit a warning rather than an error because the
9753 mask could be resolving this problem. */
9754 if (!find_forall_index (code
->expr1
, forall_index
, 0))
9755 gfc_warning (0, "The FORALL with index %qs is not used on the "
9756 "left side of the assignment at %L and so might "
9757 "cause multiple assignment to this object",
9758 var_expr
[n
]->symtree
->name
, &code
->expr1
->where
);
9764 /* Resolve WHERE statement in FORALL construct. */
9767 gfc_resolve_where_code_in_forall (gfc_code
*code
, int nvar
,
9768 gfc_expr
**var_expr
)
9773 cblock
= code
->block
;
9776 /* the assignment statement of a WHERE statement, or the first
9777 statement in where-body-construct of a WHERE construct */
9778 cnext
= cblock
->next
;
9783 /* WHERE assignment statement */
9785 gfc_resolve_assign_in_forall (cnext
, nvar
, var_expr
);
9788 /* WHERE operator assignment statement */
9789 case EXEC_ASSIGN_CALL
:
9790 resolve_call (cnext
);
9791 if (!cnext
->resolved_sym
->attr
.elemental
)
9792 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9793 &cnext
->ext
.actual
->expr
->where
);
9796 /* WHERE or WHERE construct is part of a where-body-construct */
9798 gfc_resolve_where_code_in_forall (cnext
, nvar
, var_expr
);
9802 gfc_error ("Unsupported statement inside WHERE at %L",
9805 /* the next statement within the same where-body-construct */
9806 cnext
= cnext
->next
;
9808 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
9809 cblock
= cblock
->block
;
9814 /* Traverse the FORALL body to check whether the following errors exist:
9815 1. For assignment, check if a many-to-one assignment happens.
9816 2. For WHERE statement, check the WHERE body to see if there is any
9817 many-to-one assignment. */
9820 gfc_resolve_forall_body (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
9824 c
= code
->block
->next
;
9830 case EXEC_POINTER_ASSIGN
:
9831 gfc_resolve_assign_in_forall (c
, nvar
, var_expr
);
9834 case EXEC_ASSIGN_CALL
:
9838 /* Because the gfc_resolve_blocks() will handle the nested FORALL,
9839 there is no need to handle it here. */
9843 gfc_resolve_where_code_in_forall(c
, nvar
, var_expr
);
9848 /* The next statement in the FORALL body. */
9854 /* Counts the number of iterators needed inside a forall construct, including
9855 nested forall constructs. This is used to allocate the needed memory
9856 in gfc_resolve_forall. */
9859 gfc_count_forall_iterators (gfc_code
*code
)
9861 int max_iters
, sub_iters
, current_iters
;
9862 gfc_forall_iterator
*fa
;
9864 gcc_assert(code
->op
== EXEC_FORALL
);
9868 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
9871 code
= code
->block
->next
;
9875 if (code
->op
== EXEC_FORALL
)
9877 sub_iters
= gfc_count_forall_iterators (code
);
9878 if (sub_iters
> max_iters
)
9879 max_iters
= sub_iters
;
9884 return current_iters
+ max_iters
;
9888 /* Given a FORALL construct, first resolve the FORALL iterator, then call
9889 gfc_resolve_forall_body to resolve the FORALL body. */
9892 gfc_resolve_forall (gfc_code
*code
, gfc_namespace
*ns
, int forall_save
)
9894 static gfc_expr
**var_expr
;
9895 static int total_var
= 0;
9896 static int nvar
= 0;
9897 int i
, old_nvar
, tmp
;
9898 gfc_forall_iterator
*fa
;
9902 /* Start to resolve a FORALL construct */
9903 if (forall_save
== 0)
9905 /* Count the total number of FORALL indices in the nested FORALL
9906 construct in order to allocate the VAR_EXPR with proper size. */
9907 total_var
= gfc_count_forall_iterators (code
);
9909 /* Allocate VAR_EXPR with NUMBER_OF_FORALL_INDEX elements. */
9910 var_expr
= XCNEWVEC (gfc_expr
*, total_var
);
9913 /* The information about FORALL iterator, including FORALL indices start, end
9914 and stride. An outer FORALL indice cannot appear in start, end or stride. */
9915 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
9917 /* Fortran 20008: C738 (R753). */
9918 if (fa
->var
->ref
&& fa
->var
->ref
->type
== REF_ARRAY
)
9920 gfc_error ("FORALL index-name at %L must be a scalar variable "
9921 "of type integer", &fa
->var
->where
);
9925 /* Check if any outer FORALL index name is the same as the current
9927 for (i
= 0; i
< nvar
; i
++)
9929 if (fa
->var
->symtree
->n
.sym
== var_expr
[i
]->symtree
->n
.sym
)
9930 gfc_error ("An outer FORALL construct already has an index "
9931 "with this name %L", &fa
->var
->where
);
9934 /* Record the current FORALL index. */
9935 var_expr
[nvar
] = gfc_copy_expr (fa
->var
);
9939 /* No memory leak. */
9940 gcc_assert (nvar
<= total_var
);
9943 /* Resolve the FORALL body. */
9944 gfc_resolve_forall_body (code
, nvar
, var_expr
);
9946 /* May call gfc_resolve_forall to resolve the inner FORALL loop. */
9947 gfc_resolve_blocks (code
->block
, ns
);
9951 /* Free only the VAR_EXPRs allocated in this frame. */
9952 for (i
= nvar
; i
< tmp
; i
++)
9953 gfc_free_expr (var_expr
[i
]);
9957 /* We are in the outermost FORALL construct. */
9958 gcc_assert (forall_save
== 0);
9960 /* VAR_EXPR is not needed any more. */
9967 /* Resolve a BLOCK construct statement. */
9970 resolve_block_construct (gfc_code
* code
)
9972 /* Resolve the BLOCK's namespace. */
9973 gfc_resolve (code
->ext
.block
.ns
);
9975 /* For an ASSOCIATE block, the associations (and their targets) are already
9976 resolved during resolve_symbol. */
9980 /* Resolve lists of blocks found in IF, SELECT CASE, WHERE, FORALL, GOTO and
9984 gfc_resolve_blocks (gfc_code
*b
, gfc_namespace
*ns
)
9988 for (; b
; b
= b
->block
)
9990 t
= gfc_resolve_expr (b
->expr1
);
9991 if (!gfc_resolve_expr (b
->expr2
))
9997 if (t
&& b
->expr1
!= NULL
9998 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
!= 0))
9999 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
10005 && b
->expr1
!= NULL
10006 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
== 0))
10007 gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
10012 resolve_branch (b
->label1
, b
);
10016 resolve_block_construct (b
);
10020 case EXEC_SELECT_TYPE
:
10023 case EXEC_DO_WHILE
:
10024 case EXEC_DO_CONCURRENT
:
10025 case EXEC_CRITICAL
:
10028 case EXEC_IOLENGTH
:
10032 case EXEC_OMP_ATOMIC
:
10033 case EXEC_OACC_ATOMIC
:
10035 gfc_omp_atomic_op aop
10036 = (gfc_omp_atomic_op
) (b
->ext
.omp_atomic
& GFC_OMP_ATOMIC_MASK
);
10038 /* Verify this before calling gfc_resolve_code, which might
10040 gcc_assert (b
->next
&& b
->next
->op
== EXEC_ASSIGN
);
10041 gcc_assert (((aop
!= GFC_OMP_ATOMIC_CAPTURE
)
10042 && b
->next
->next
== NULL
)
10043 || ((aop
== GFC_OMP_ATOMIC_CAPTURE
)
10044 && b
->next
->next
!= NULL
10045 && b
->next
->next
->op
== EXEC_ASSIGN
10046 && b
->next
->next
->next
== NULL
));
10050 case EXEC_OACC_PARALLEL_LOOP
:
10051 case EXEC_OACC_PARALLEL
:
10052 case EXEC_OACC_KERNELS_LOOP
:
10053 case EXEC_OACC_KERNELS
:
10054 case EXEC_OACC_DATA
:
10055 case EXEC_OACC_HOST_DATA
:
10056 case EXEC_OACC_LOOP
:
10057 case EXEC_OACC_UPDATE
:
10058 case EXEC_OACC_WAIT
:
10059 case EXEC_OACC_CACHE
:
10060 case EXEC_OACC_ENTER_DATA
:
10061 case EXEC_OACC_EXIT_DATA
:
10062 case EXEC_OACC_ROUTINE
:
10063 case EXEC_OMP_CRITICAL
:
10064 case EXEC_OMP_DISTRIBUTE
:
10065 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
10066 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
10067 case EXEC_OMP_DISTRIBUTE_SIMD
:
10069 case EXEC_OMP_DO_SIMD
:
10070 case EXEC_OMP_MASTER
:
10071 case EXEC_OMP_ORDERED
:
10072 case EXEC_OMP_PARALLEL
:
10073 case EXEC_OMP_PARALLEL_DO
:
10074 case EXEC_OMP_PARALLEL_DO_SIMD
:
10075 case EXEC_OMP_PARALLEL_SECTIONS
:
10076 case EXEC_OMP_PARALLEL_WORKSHARE
:
10077 case EXEC_OMP_SECTIONS
:
10078 case EXEC_OMP_SIMD
:
10079 case EXEC_OMP_SINGLE
:
10080 case EXEC_OMP_TARGET
:
10081 case EXEC_OMP_TARGET_DATA
:
10082 case EXEC_OMP_TARGET_ENTER_DATA
:
10083 case EXEC_OMP_TARGET_EXIT_DATA
:
10084 case EXEC_OMP_TARGET_PARALLEL
:
10085 case EXEC_OMP_TARGET_PARALLEL_DO
:
10086 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
10087 case EXEC_OMP_TARGET_SIMD
:
10088 case EXEC_OMP_TARGET_TEAMS
:
10089 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
10090 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10091 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10092 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
10093 case EXEC_OMP_TARGET_UPDATE
:
10094 case EXEC_OMP_TASK
:
10095 case EXEC_OMP_TASKGROUP
:
10096 case EXEC_OMP_TASKLOOP
:
10097 case EXEC_OMP_TASKLOOP_SIMD
:
10098 case EXEC_OMP_TASKWAIT
:
10099 case EXEC_OMP_TASKYIELD
:
10100 case EXEC_OMP_TEAMS
:
10101 case EXEC_OMP_TEAMS_DISTRIBUTE
:
10102 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10103 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10104 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
10105 case EXEC_OMP_WORKSHARE
:
10109 gfc_internal_error ("gfc_resolve_blocks(): Bad block type");
10112 gfc_resolve_code (b
->next
, ns
);
10117 /* Does everything to resolve an ordinary assignment. Returns true
10118 if this is an interface assignment. */
10120 resolve_ordinary_assign (gfc_code
*code
, gfc_namespace
*ns
)
10127 symbol_attribute attr
;
10129 if (gfc_extend_assign (code
, ns
))
10133 if (code
->op
== EXEC_ASSIGN_CALL
)
10135 lhs
= code
->ext
.actual
->expr
;
10136 rhsptr
= &code
->ext
.actual
->next
->expr
;
10140 gfc_actual_arglist
* args
;
10141 gfc_typebound_proc
* tbp
;
10143 gcc_assert (code
->op
== EXEC_COMPCALL
);
10145 args
= code
->expr1
->value
.compcall
.actual
;
10147 rhsptr
= &args
->next
->expr
;
10149 tbp
= code
->expr1
->value
.compcall
.tbp
;
10150 gcc_assert (!tbp
->is_generic
);
10153 /* Make a temporary rhs when there is a default initializer
10154 and rhs is the same symbol as the lhs. */
10155 if ((*rhsptr
)->expr_type
== EXPR_VARIABLE
10156 && (*rhsptr
)->symtree
->n
.sym
->ts
.type
== BT_DERIVED
10157 && gfc_has_default_initializer ((*rhsptr
)->symtree
->n
.sym
->ts
.u
.derived
)
10158 && (lhs
->symtree
->n
.sym
== (*rhsptr
)->symtree
->n
.sym
))
10159 *rhsptr
= gfc_get_parentheses (*rhsptr
);
10168 && !gfc_notify_std (GFC_STD_GNU
, "BOZ literal at %L outside "
10169 "a DATA statement and outside INT/REAL/DBLE/CMPLX",
10173 /* Handle the case of a BOZ literal on the RHS. */
10174 if (rhs
->is_boz
&& lhs
->ts
.type
!= BT_INTEGER
)
10177 if (warn_surprising
)
10178 gfc_warning (OPT_Wsurprising
,
10179 "BOZ literal at %L is bitwise transferred "
10180 "non-integer symbol %qs", &code
->loc
,
10181 lhs
->symtree
->n
.sym
->name
);
10183 if (!gfc_convert_boz (rhs
, &lhs
->ts
))
10185 if ((rc
= gfc_range_check (rhs
)) != ARITH_OK
)
10187 if (rc
== ARITH_UNDERFLOW
)
10188 gfc_error ("Arithmetic underflow of bit-wise transferred BOZ at %L"
10189 ". This check can be disabled with the option "
10190 "%<-fno-range-check%>", &rhs
->where
);
10191 else if (rc
== ARITH_OVERFLOW
)
10192 gfc_error ("Arithmetic overflow of bit-wise transferred BOZ at %L"
10193 ". This check can be disabled with the option "
10194 "%<-fno-range-check%>", &rhs
->where
);
10195 else if (rc
== ARITH_NAN
)
10196 gfc_error ("Arithmetic NaN of bit-wise transferred BOZ at %L"
10197 ". This check can be disabled with the option "
10198 "%<-fno-range-check%>", &rhs
->where
);
10203 if (lhs
->ts
.type
== BT_CHARACTER
10204 && warn_character_truncation
)
10206 HOST_WIDE_INT llen
= 0, rlen
= 0;
10207 if (lhs
->ts
.u
.cl
!= NULL
10208 && lhs
->ts
.u
.cl
->length
!= NULL
10209 && lhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10210 llen
= gfc_mpz_get_hwi (lhs
->ts
.u
.cl
->length
->value
.integer
);
10212 if (rhs
->expr_type
== EXPR_CONSTANT
)
10213 rlen
= rhs
->value
.character
.length
;
10215 else if (rhs
->ts
.u
.cl
!= NULL
10216 && rhs
->ts
.u
.cl
->length
!= NULL
10217 && rhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10218 rlen
= gfc_mpz_get_hwi (rhs
->ts
.u
.cl
->length
->value
.integer
);
10220 if (rlen
&& llen
&& rlen
> llen
)
10221 gfc_warning_now (OPT_Wcharacter_truncation
,
10222 "CHARACTER expression will be truncated "
10223 "in assignment (%ld/%ld) at %L",
10224 (long) llen
, (long) rlen
, &code
->loc
);
10227 /* Ensure that a vector index expression for the lvalue is evaluated
10228 to a temporary if the lvalue symbol is referenced in it. */
10231 for (ref
= lhs
->ref
; ref
; ref
= ref
->next
)
10232 if (ref
->type
== REF_ARRAY
)
10234 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
10235 if (ref
->u
.ar
.dimen_type
[n
] == DIMEN_VECTOR
10236 && gfc_find_sym_in_expr (lhs
->symtree
->n
.sym
,
10237 ref
->u
.ar
.start
[n
]))
10239 = gfc_get_parentheses (ref
->u
.ar
.start
[n
]);
10243 if (gfc_pure (NULL
))
10245 if (lhs
->ts
.type
== BT_DERIVED
10246 && lhs
->expr_type
== EXPR_VARIABLE
10247 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10248 && rhs
->expr_type
== EXPR_VARIABLE
10249 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10250 || gfc_is_coindexed (rhs
)))
10252 /* F2008, C1283. */
10253 if (gfc_is_coindexed (rhs
))
10254 gfc_error ("Coindexed expression at %L is assigned to "
10255 "a derived type variable with a POINTER "
10256 "component in a PURE procedure",
10259 gfc_error ("The impure variable at %L is assigned to "
10260 "a derived type variable with a POINTER "
10261 "component in a PURE procedure (12.6)",
10266 /* Fortran 2008, C1283. */
10267 if (gfc_is_coindexed (lhs
))
10269 gfc_error ("Assignment to coindexed variable at %L in a PURE "
10270 "procedure", &rhs
->where
);
10275 if (gfc_implicit_pure (NULL
))
10277 if (lhs
->expr_type
== EXPR_VARIABLE
10278 && lhs
->symtree
->n
.sym
!= gfc_current_ns
->proc_name
10279 && lhs
->symtree
->n
.sym
->ns
!= gfc_current_ns
)
10280 gfc_unset_implicit_pure (NULL
);
10282 if (lhs
->ts
.type
== BT_DERIVED
10283 && lhs
->expr_type
== EXPR_VARIABLE
10284 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10285 && rhs
->expr_type
== EXPR_VARIABLE
10286 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10287 || gfc_is_coindexed (rhs
)))
10288 gfc_unset_implicit_pure (NULL
);
10290 /* Fortran 2008, C1283. */
10291 if (gfc_is_coindexed (lhs
))
10292 gfc_unset_implicit_pure (NULL
);
10295 /* F2008, 7.2.1.2. */
10296 attr
= gfc_expr_attr (lhs
);
10297 if (lhs
->ts
.type
== BT_CLASS
&& attr
.allocatable
)
10299 if (attr
.codimension
)
10301 gfc_error ("Assignment to polymorphic coarray at %L is not "
10302 "permitted", &lhs
->where
);
10305 if (!gfc_notify_std (GFC_STD_F2008
, "Assignment to an allocatable "
10306 "polymorphic variable at %L", &lhs
->where
))
10308 if (!flag_realloc_lhs
)
10310 gfc_error ("Assignment to an allocatable polymorphic variable at %L "
10311 "requires %<-frealloc-lhs%>", &lhs
->where
);
10315 else if (lhs
->ts
.type
== BT_CLASS
)
10317 gfc_error ("Nonallocatable variable must not be polymorphic in intrinsic "
10318 "assignment at %L - check that there is a matching specific "
10319 "subroutine for '=' operator", &lhs
->where
);
10323 bool lhs_coindexed
= gfc_is_coindexed (lhs
);
10325 /* F2008, Section 7.2.1.2. */
10326 if (lhs_coindexed
&& gfc_has_ultimate_allocatable (lhs
))
10328 gfc_error ("Coindexed variable must not have an allocatable ultimate "
10329 "component in assignment at %L", &lhs
->where
);
10333 /* Assign the 'data' of a class object to a derived type. */
10334 if (lhs
->ts
.type
== BT_DERIVED
10335 && rhs
->ts
.type
== BT_CLASS
10336 && rhs
->expr_type
!= EXPR_ARRAY
)
10337 gfc_add_data_component (rhs
);
10339 bool caf_convert_to_send
= flag_coarray
== GFC_FCOARRAY_LIB
10341 || (code
->expr2
->expr_type
== EXPR_FUNCTION
10342 && code
->expr2
->value
.function
.isym
10343 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
10344 && (code
->expr1
->rank
== 0 || code
->expr2
->rank
!= 0)
10345 && !gfc_expr_attr (rhs
).allocatable
10346 && !gfc_has_vector_subscript (rhs
)));
10348 gfc_check_assign (lhs
, rhs
, 1, !caf_convert_to_send
);
10350 /* Insert a GFC_ISYM_CAF_SEND intrinsic, when the LHS is a coindexed variable.
10351 Additionally, insert this code when the RHS is a CAF as we then use the
10352 GFC_ISYM_CAF_SEND intrinsic just to avoid a temporary; but do not do so if
10353 the LHS is (re)allocatable or has a vector subscript. If the LHS is a
10354 noncoindexed array and the RHS is a coindexed scalar, use the normal code
10356 if (caf_convert_to_send
)
10358 if (code
->expr2
->expr_type
== EXPR_FUNCTION
10359 && code
->expr2
->value
.function
.isym
10360 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
10361 remove_caf_get_intrinsic (code
->expr2
);
10362 code
->op
= EXEC_CALL
;
10363 gfc_get_sym_tree (GFC_PREFIX ("caf_send"), ns
, &code
->symtree
, true);
10364 code
->resolved_sym
= code
->symtree
->n
.sym
;
10365 code
->resolved_sym
->attr
.flavor
= FL_PROCEDURE
;
10366 code
->resolved_sym
->attr
.intrinsic
= 1;
10367 code
->resolved_sym
->attr
.subroutine
= 1;
10368 code
->resolved_isym
= gfc_intrinsic_subroutine_by_id (GFC_ISYM_CAF_SEND
);
10369 gfc_commit_symbol (code
->resolved_sym
);
10370 code
->ext
.actual
= gfc_get_actual_arglist ();
10371 code
->ext
.actual
->expr
= lhs
;
10372 code
->ext
.actual
->next
= gfc_get_actual_arglist ();
10373 code
->ext
.actual
->next
->expr
= rhs
;
10374 code
->expr1
= NULL
;
10375 code
->expr2
= NULL
;
10382 /* Add a component reference onto an expression. */
10385 add_comp_ref (gfc_expr
*e
, gfc_component
*c
)
10390 ref
= &((*ref
)->next
);
10391 *ref
= gfc_get_ref ();
10392 (*ref
)->type
= REF_COMPONENT
;
10393 (*ref
)->u
.c
.sym
= e
->ts
.u
.derived
;
10394 (*ref
)->u
.c
.component
= c
;
10397 /* Add a full array ref, as necessary. */
10400 gfc_add_full_array_ref (e
, c
->as
);
10401 e
->rank
= c
->as
->rank
;
10406 /* Build an assignment. Keep the argument 'op' for future use, so that
10407 pointer assignments can be made. */
10410 build_assignment (gfc_exec_op op
, gfc_expr
*expr1
, gfc_expr
*expr2
,
10411 gfc_component
*comp1
, gfc_component
*comp2
, locus loc
)
10413 gfc_code
*this_code
;
10415 this_code
= gfc_get_code (op
);
10416 this_code
->next
= NULL
;
10417 this_code
->expr1
= gfc_copy_expr (expr1
);
10418 this_code
->expr2
= gfc_copy_expr (expr2
);
10419 this_code
->loc
= loc
;
10420 if (comp1
&& comp2
)
10422 add_comp_ref (this_code
->expr1
, comp1
);
10423 add_comp_ref (this_code
->expr2
, comp2
);
10430 /* Makes a temporary variable expression based on the characteristics of
10431 a given variable expression. */
10434 get_temp_from_expr (gfc_expr
*e
, gfc_namespace
*ns
)
10436 static int serial
= 0;
10437 char name
[GFC_MAX_SYMBOL_LEN
];
10439 gfc_array_spec
*as
;
10440 gfc_array_ref
*aref
;
10443 sprintf (name
, GFC_PREFIX("DA%d"), serial
++);
10444 gfc_get_sym_tree (name
, ns
, &tmp
, false);
10445 gfc_add_type (tmp
->n
.sym
, &e
->ts
, NULL
);
10451 /* Obtain the arrayspec for the temporary. */
10452 if (e
->rank
&& e
->expr_type
!= EXPR_ARRAY
10453 && e
->expr_type
!= EXPR_FUNCTION
10454 && e
->expr_type
!= EXPR_OP
)
10456 aref
= gfc_find_array_ref (e
);
10457 if (e
->expr_type
== EXPR_VARIABLE
10458 && e
->symtree
->n
.sym
->as
== aref
->as
)
10462 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
10463 if (ref
->type
== REF_COMPONENT
10464 && ref
->u
.c
.component
->as
== aref
->as
)
10472 /* Add the attributes and the arrayspec to the temporary. */
10473 tmp
->n
.sym
->attr
= gfc_expr_attr (e
);
10474 tmp
->n
.sym
->attr
.function
= 0;
10475 tmp
->n
.sym
->attr
.result
= 0;
10476 tmp
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
10480 tmp
->n
.sym
->as
= gfc_copy_array_spec (as
);
10483 if (as
->type
== AS_DEFERRED
)
10484 tmp
->n
.sym
->attr
.allocatable
= 1;
10486 else if (e
->rank
&& (e
->expr_type
== EXPR_ARRAY
10487 || e
->expr_type
== EXPR_FUNCTION
10488 || e
->expr_type
== EXPR_OP
))
10490 tmp
->n
.sym
->as
= gfc_get_array_spec ();
10491 tmp
->n
.sym
->as
->type
= AS_DEFERRED
;
10492 tmp
->n
.sym
->as
->rank
= e
->rank
;
10493 tmp
->n
.sym
->attr
.allocatable
= 1;
10494 tmp
->n
.sym
->attr
.dimension
= 1;
10497 tmp
->n
.sym
->attr
.dimension
= 0;
10499 gfc_set_sym_referenced (tmp
->n
.sym
);
10500 gfc_commit_symbol (tmp
->n
.sym
);
10501 e
= gfc_lval_expr_from_sym (tmp
->n
.sym
);
10503 /* Should the lhs be a section, use its array ref for the
10504 temporary expression. */
10505 if (aref
&& aref
->type
!= AR_FULL
)
10507 gfc_free_ref_list (e
->ref
);
10508 e
->ref
= gfc_copy_ref (ref
);
10514 /* Add one line of code to the code chain, making sure that 'head' and
10515 'tail' are appropriately updated. */
10518 add_code_to_chain (gfc_code
**this_code
, gfc_code
**head
, gfc_code
**tail
)
10520 gcc_assert (this_code
);
10522 *head
= *tail
= *this_code
;
10524 *tail
= gfc_append_code (*tail
, *this_code
);
10529 /* Counts the potential number of part array references that would
10530 result from resolution of typebound defined assignments. */
10533 nonscalar_typebound_assign (gfc_symbol
*derived
, int depth
)
10536 int c_depth
= 0, t_depth
;
10538 for (c
= derived
->components
; c
; c
= c
->next
)
10540 if ((!gfc_bt_struct (c
->ts
.type
)
10542 || c
->attr
.allocatable
10543 || c
->attr
.proc_pointer_comp
10544 || c
->attr
.class_pointer
10545 || c
->attr
.proc_pointer
)
10546 && !c
->attr
.defined_assign_comp
)
10549 if (c
->as
&& c_depth
== 0)
10552 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
10553 t_depth
= nonscalar_typebound_assign (c
->ts
.u
.derived
,
10558 c_depth
= t_depth
> c_depth
? t_depth
: c_depth
;
10560 return depth
+ c_depth
;
10564 /* Implement 7.2.1.3 of the F08 standard:
10565 "An intrinsic assignment where the variable is of derived type is
10566 performed as if each component of the variable were assigned from the
10567 corresponding component of expr using pointer assignment (7.2.2) for
10568 each pointer component, defined assignment for each nonpointer
10569 nonallocatable component of a type that has a type-bound defined
10570 assignment consistent with the component, intrinsic assignment for
10571 each other nonpointer nonallocatable component, ..."
10573 The pointer assignments are taken care of by the intrinsic
10574 assignment of the structure itself. This function recursively adds
10575 defined assignments where required. The recursion is accomplished
10576 by calling gfc_resolve_code.
10578 When the lhs in a defined assignment has intent INOUT, we need a
10579 temporary for the lhs. In pseudo-code:
10581 ! Only call function lhs once.
10582 if (lhs is not a constant or an variable)
10585 ! Do the intrinsic assignment
10587 ! Now do the defined assignments
10588 do over components with typebound defined assignment [%cmp]
10589 #if one component's assignment procedure is INOUT
10591 #if expr2 non-variable
10597 t1%cmp {defined=} expr2%cmp
10603 expr1%cmp {defined=} expr2%cmp
10607 /* The temporary assignments have to be put on top of the additional
10608 code to avoid the result being changed by the intrinsic assignment.
10610 static int component_assignment_level
= 0;
10611 static gfc_code
*tmp_head
= NULL
, *tmp_tail
= NULL
;
10614 generate_component_assignments (gfc_code
**code
, gfc_namespace
*ns
)
10616 gfc_component
*comp1
, *comp2
;
10617 gfc_code
*this_code
= NULL
, *head
= NULL
, *tail
= NULL
;
10619 int error_count
, depth
;
10621 gfc_get_errors (NULL
, &error_count
);
10623 /* Filter out continuing processing after an error. */
10625 || (*code
)->expr1
->ts
.type
!= BT_DERIVED
10626 || (*code
)->expr2
->ts
.type
!= BT_DERIVED
)
10629 /* TODO: Handle more than one part array reference in assignments. */
10630 depth
= nonscalar_typebound_assign ((*code
)->expr1
->ts
.u
.derived
,
10631 (*code
)->expr1
->rank
? 1 : 0);
10634 gfc_warning (0, "TODO: type-bound defined assignment(s) at %L not "
10635 "done because multiple part array references would "
10636 "occur in intermediate expressions.", &(*code
)->loc
);
10640 component_assignment_level
++;
10642 /* Create a temporary so that functions get called only once. */
10643 if ((*code
)->expr2
->expr_type
!= EXPR_VARIABLE
10644 && (*code
)->expr2
->expr_type
!= EXPR_CONSTANT
)
10646 gfc_expr
*tmp_expr
;
10648 /* Assign the rhs to the temporary. */
10649 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
10650 this_code
= build_assignment (EXEC_ASSIGN
,
10651 tmp_expr
, (*code
)->expr2
,
10652 NULL
, NULL
, (*code
)->loc
);
10653 /* Add the code and substitute the rhs expression. */
10654 add_code_to_chain (&this_code
, &tmp_head
, &tmp_tail
);
10655 gfc_free_expr ((*code
)->expr2
);
10656 (*code
)->expr2
= tmp_expr
;
10659 /* Do the intrinsic assignment. This is not needed if the lhs is one
10660 of the temporaries generated here, since the intrinsic assignment
10661 to the final result already does this. */
10662 if ((*code
)->expr1
->symtree
->n
.sym
->name
[2] != '@')
10664 this_code
= build_assignment (EXEC_ASSIGN
,
10665 (*code
)->expr1
, (*code
)->expr2
,
10666 NULL
, NULL
, (*code
)->loc
);
10667 add_code_to_chain (&this_code
, &head
, &tail
);
10670 comp1
= (*code
)->expr1
->ts
.u
.derived
->components
;
10671 comp2
= (*code
)->expr2
->ts
.u
.derived
->components
;
10674 for (; comp1
; comp1
= comp1
->next
, comp2
= comp2
->next
)
10676 bool inout
= false;
10678 /* The intrinsic assignment does the right thing for pointers
10679 of all kinds and allocatable components. */
10680 if (!gfc_bt_struct (comp1
->ts
.type
)
10681 || comp1
->attr
.pointer
10682 || comp1
->attr
.allocatable
10683 || comp1
->attr
.proc_pointer_comp
10684 || comp1
->attr
.class_pointer
10685 || comp1
->attr
.proc_pointer
)
10688 /* Make an assigment for this component. */
10689 this_code
= build_assignment (EXEC_ASSIGN
,
10690 (*code
)->expr1
, (*code
)->expr2
,
10691 comp1
, comp2
, (*code
)->loc
);
10693 /* Convert the assignment if there is a defined assignment for
10694 this type. Otherwise, using the call from gfc_resolve_code,
10695 recurse into its components. */
10696 gfc_resolve_code (this_code
, ns
);
10698 if (this_code
->op
== EXEC_ASSIGN_CALL
)
10700 gfc_formal_arglist
*dummy_args
;
10702 /* Check that there is a typebound defined assignment. If not,
10703 then this must be a module defined assignment. We cannot
10704 use the defined_assign_comp attribute here because it must
10705 be this derived type that has the defined assignment and not
10707 if (!(comp1
->ts
.u
.derived
->f2k_derived
10708 && comp1
->ts
.u
.derived
->f2k_derived
10709 ->tb_op
[INTRINSIC_ASSIGN
]))
10711 gfc_free_statements (this_code
);
10716 /* If the first argument of the subroutine has intent INOUT
10717 a temporary must be generated and used instead. */
10718 rsym
= this_code
->resolved_sym
;
10719 dummy_args
= gfc_sym_get_dummy_args (rsym
);
10721 && dummy_args
->sym
->attr
.intent
== INTENT_INOUT
)
10723 gfc_code
*temp_code
;
10726 /* Build the temporary required for the assignment and put
10727 it at the head of the generated code. */
10730 t1
= get_temp_from_expr ((*code
)->expr1
, ns
);
10731 temp_code
= build_assignment (EXEC_ASSIGN
,
10732 t1
, (*code
)->expr1
,
10733 NULL
, NULL
, (*code
)->loc
);
10735 /* For allocatable LHS, check whether it is allocated. Note
10736 that allocatable components with defined assignment are
10737 not yet support. See PR 57696. */
10738 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
)
10742 gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
10743 block
= gfc_get_code (EXEC_IF
);
10744 block
->block
= gfc_get_code (EXEC_IF
);
10745 block
->block
->expr1
10746 = gfc_build_intrinsic_call (ns
,
10747 GFC_ISYM_ALLOCATED
, "allocated",
10748 (*code
)->loc
, 1, e
);
10749 block
->block
->next
= temp_code
;
10752 add_code_to_chain (&temp_code
, &tmp_head
, &tmp_tail
);
10755 /* Replace the first actual arg with the component of the
10757 gfc_free_expr (this_code
->ext
.actual
->expr
);
10758 this_code
->ext
.actual
->expr
= gfc_copy_expr (t1
);
10759 add_comp_ref (this_code
->ext
.actual
->expr
, comp1
);
10761 /* If the LHS variable is allocatable and wasn't allocated and
10762 the temporary is allocatable, pointer assign the address of
10763 the freshly allocated LHS to the temporary. */
10764 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
10765 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
10770 cond
= gfc_get_expr ();
10771 cond
->ts
.type
= BT_LOGICAL
;
10772 cond
->ts
.kind
= gfc_default_logical_kind
;
10773 cond
->expr_type
= EXPR_OP
;
10774 cond
->where
= (*code
)->loc
;
10775 cond
->value
.op
.op
= INTRINSIC_NOT
;
10776 cond
->value
.op
.op1
= gfc_build_intrinsic_call (ns
,
10777 GFC_ISYM_ALLOCATED
, "allocated",
10778 (*code
)->loc
, 1, gfc_copy_expr (t1
));
10779 block
= gfc_get_code (EXEC_IF
);
10780 block
->block
= gfc_get_code (EXEC_IF
);
10781 block
->block
->expr1
= cond
;
10782 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
10783 t1
, (*code
)->expr1
,
10784 NULL
, NULL
, (*code
)->loc
);
10785 add_code_to_chain (&block
, &head
, &tail
);
10789 else if (this_code
->op
== EXEC_ASSIGN
&& !this_code
->next
)
10791 /* Don't add intrinsic assignments since they are already
10792 effected by the intrinsic assignment of the structure. */
10793 gfc_free_statements (this_code
);
10798 add_code_to_chain (&this_code
, &head
, &tail
);
10802 /* Transfer the value to the final result. */
10803 this_code
= build_assignment (EXEC_ASSIGN
,
10804 (*code
)->expr1
, t1
,
10805 comp1
, comp2
, (*code
)->loc
);
10806 add_code_to_chain (&this_code
, &head
, &tail
);
10810 /* Put the temporary assignments at the top of the generated code. */
10811 if (tmp_head
&& component_assignment_level
== 1)
10813 gfc_append_code (tmp_head
, head
);
10815 tmp_head
= tmp_tail
= NULL
;
10818 // If we did a pointer assignment - thus, we need to ensure that the LHS is
10819 // not accidentally deallocated. Hence, nullify t1.
10820 if (t1
&& (*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
10821 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
10827 e
= gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
10828 cond
= gfc_build_intrinsic_call (ns
, GFC_ISYM_ASSOCIATED
, "associated",
10829 (*code
)->loc
, 2, gfc_copy_expr (t1
), e
);
10830 block
= gfc_get_code (EXEC_IF
);
10831 block
->block
= gfc_get_code (EXEC_IF
);
10832 block
->block
->expr1
= cond
;
10833 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
10834 t1
, gfc_get_null_expr (&(*code
)->loc
),
10835 NULL
, NULL
, (*code
)->loc
);
10836 gfc_append_code (tail
, block
);
10840 /* Now attach the remaining code chain to the input code. Step on
10841 to the end of the new code since resolution is complete. */
10842 gcc_assert ((*code
)->op
== EXEC_ASSIGN
);
10843 tail
->next
= (*code
)->next
;
10844 /* Overwrite 'code' because this would place the intrinsic assignment
10845 before the temporary for the lhs is created. */
10846 gfc_free_expr ((*code
)->expr1
);
10847 gfc_free_expr ((*code
)->expr2
);
10853 component_assignment_level
--;
10857 /* F2008: Pointer function assignments are of the form:
10858 ptr_fcn (args) = expr
10859 This function breaks these assignments into two statements:
10860 temporary_pointer => ptr_fcn(args)
10861 temporary_pointer = expr */
10864 resolve_ptr_fcn_assign (gfc_code
**code
, gfc_namespace
*ns
)
10866 gfc_expr
*tmp_ptr_expr
;
10867 gfc_code
*this_code
;
10868 gfc_component
*comp
;
10871 if ((*code
)->expr1
->expr_type
!= EXPR_FUNCTION
)
10874 /* Even if standard does not support this feature, continue to build
10875 the two statements to avoid upsetting frontend_passes.c. */
10876 gfc_notify_std (GFC_STD_F2008
, "Pointer procedure assignment at "
10877 "%L", &(*code
)->loc
);
10879 comp
= gfc_get_proc_ptr_comp ((*code
)->expr1
);
10882 s
= comp
->ts
.interface
;
10884 s
= (*code
)->expr1
->symtree
->n
.sym
;
10886 if (s
== NULL
|| !s
->result
->attr
.pointer
)
10888 gfc_error ("The function result on the lhs of the assignment at "
10889 "%L must have the pointer attribute.",
10890 &(*code
)->expr1
->where
);
10891 (*code
)->op
= EXEC_NOP
;
10895 tmp_ptr_expr
= get_temp_from_expr ((*code
)->expr2
, ns
);
10897 /* get_temp_from_expression is set up for ordinary assignments. To that
10898 end, where array bounds are not known, arrays are made allocatable.
10899 Change the temporary to a pointer here. */
10900 tmp_ptr_expr
->symtree
->n
.sym
->attr
.pointer
= 1;
10901 tmp_ptr_expr
->symtree
->n
.sym
->attr
.allocatable
= 0;
10902 tmp_ptr_expr
->where
= (*code
)->loc
;
10904 this_code
= build_assignment (EXEC_ASSIGN
,
10905 tmp_ptr_expr
, (*code
)->expr2
,
10906 NULL
, NULL
, (*code
)->loc
);
10907 this_code
->next
= (*code
)->next
;
10908 (*code
)->next
= this_code
;
10909 (*code
)->op
= EXEC_POINTER_ASSIGN
;
10910 (*code
)->expr2
= (*code
)->expr1
;
10911 (*code
)->expr1
= tmp_ptr_expr
;
10917 /* Deferred character length assignments from an operator expression
10918 require a temporary because the character length of the lhs can
10919 change in the course of the assignment. */
10922 deferred_op_assign (gfc_code
**code
, gfc_namespace
*ns
)
10924 gfc_expr
*tmp_expr
;
10925 gfc_code
*this_code
;
10927 if (!((*code
)->expr1
->ts
.type
== BT_CHARACTER
10928 && (*code
)->expr1
->ts
.deferred
&& (*code
)->expr1
->rank
10929 && (*code
)->expr2
->expr_type
== EXPR_OP
))
10932 if (!gfc_check_dependency ((*code
)->expr1
, (*code
)->expr2
, 1))
10935 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
10936 tmp_expr
->where
= (*code
)->loc
;
10938 /* A new charlen is required to ensure that the variable string
10939 length is different to that of the original lhs. */
10940 tmp_expr
->ts
.u
.cl
= gfc_get_charlen();
10941 tmp_expr
->symtree
->n
.sym
->ts
.u
.cl
= tmp_expr
->ts
.u
.cl
;
10942 tmp_expr
->ts
.u
.cl
->next
= (*code
)->expr2
->ts
.u
.cl
->next
;
10943 (*code
)->expr2
->ts
.u
.cl
->next
= tmp_expr
->ts
.u
.cl
;
10945 tmp_expr
->symtree
->n
.sym
->ts
.deferred
= 1;
10947 this_code
= build_assignment (EXEC_ASSIGN
,
10949 gfc_copy_expr (tmp_expr
),
10950 NULL
, NULL
, (*code
)->loc
);
10952 (*code
)->expr1
= tmp_expr
;
10954 this_code
->next
= (*code
)->next
;
10955 (*code
)->next
= this_code
;
10961 /* Given a block of code, recursively resolve everything pointed to by this
10965 gfc_resolve_code (gfc_code
*code
, gfc_namespace
*ns
)
10967 int omp_workshare_save
;
10968 int forall_save
, do_concurrent_save
;
10972 frame
.prev
= cs_base
;
10976 find_reachable_labels (code
);
10978 for (; code
; code
= code
->next
)
10980 frame
.current
= code
;
10981 forall_save
= forall_flag
;
10982 do_concurrent_save
= gfc_do_concurrent_flag
;
10984 if (code
->op
== EXEC_FORALL
)
10987 gfc_resolve_forall (code
, ns
, forall_save
);
10990 else if (code
->block
)
10992 omp_workshare_save
= -1;
10995 case EXEC_OACC_PARALLEL_LOOP
:
10996 case EXEC_OACC_PARALLEL
:
10997 case EXEC_OACC_KERNELS_LOOP
:
10998 case EXEC_OACC_KERNELS
:
10999 case EXEC_OACC_DATA
:
11000 case EXEC_OACC_HOST_DATA
:
11001 case EXEC_OACC_LOOP
:
11002 gfc_resolve_oacc_blocks (code
, ns
);
11004 case EXEC_OMP_PARALLEL_WORKSHARE
:
11005 omp_workshare_save
= omp_workshare_flag
;
11006 omp_workshare_flag
= 1;
11007 gfc_resolve_omp_parallel_blocks (code
, ns
);
11009 case EXEC_OMP_PARALLEL
:
11010 case EXEC_OMP_PARALLEL_DO
:
11011 case EXEC_OMP_PARALLEL_DO_SIMD
:
11012 case EXEC_OMP_PARALLEL_SECTIONS
:
11013 case EXEC_OMP_TARGET_PARALLEL
:
11014 case EXEC_OMP_TARGET_PARALLEL_DO
:
11015 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11016 case EXEC_OMP_TARGET_TEAMS
:
11017 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11018 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11019 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11020 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11021 case EXEC_OMP_TASK
:
11022 case EXEC_OMP_TASKLOOP
:
11023 case EXEC_OMP_TASKLOOP_SIMD
:
11024 case EXEC_OMP_TEAMS
:
11025 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11026 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11027 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11028 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11029 omp_workshare_save
= omp_workshare_flag
;
11030 omp_workshare_flag
= 0;
11031 gfc_resolve_omp_parallel_blocks (code
, ns
);
11033 case EXEC_OMP_DISTRIBUTE
:
11034 case EXEC_OMP_DISTRIBUTE_SIMD
:
11036 case EXEC_OMP_DO_SIMD
:
11037 case EXEC_OMP_SIMD
:
11038 case EXEC_OMP_TARGET_SIMD
:
11039 gfc_resolve_omp_do_blocks (code
, ns
);
11041 case EXEC_SELECT_TYPE
:
11042 /* Blocks are handled in resolve_select_type because we have
11043 to transform the SELECT TYPE into ASSOCIATE first. */
11045 case EXEC_DO_CONCURRENT
:
11046 gfc_do_concurrent_flag
= 1;
11047 gfc_resolve_blocks (code
->block
, ns
);
11048 gfc_do_concurrent_flag
= 2;
11050 case EXEC_OMP_WORKSHARE
:
11051 omp_workshare_save
= omp_workshare_flag
;
11052 omp_workshare_flag
= 1;
11055 gfc_resolve_blocks (code
->block
, ns
);
11059 if (omp_workshare_save
!= -1)
11060 omp_workshare_flag
= omp_workshare_save
;
11064 if (code
->op
!= EXEC_COMPCALL
&& code
->op
!= EXEC_CALL_PPC
)
11065 t
= gfc_resolve_expr (code
->expr1
);
11066 forall_flag
= forall_save
;
11067 gfc_do_concurrent_flag
= do_concurrent_save
;
11069 if (!gfc_resolve_expr (code
->expr2
))
11072 if (code
->op
== EXEC_ALLOCATE
11073 && !gfc_resolve_expr (code
->expr3
))
11079 case EXEC_END_BLOCK
:
11080 case EXEC_END_NESTED_BLOCK
:
11084 case EXEC_ERROR_STOP
:
11086 case EXEC_CONTINUE
:
11088 case EXEC_ASSIGN_CALL
:
11091 case EXEC_CRITICAL
:
11092 resolve_critical (code
);
11095 case EXEC_SYNC_ALL
:
11096 case EXEC_SYNC_IMAGES
:
11097 case EXEC_SYNC_MEMORY
:
11098 resolve_sync (code
);
11103 case EXEC_EVENT_POST
:
11104 case EXEC_EVENT_WAIT
:
11105 resolve_lock_unlock_event (code
);
11108 case EXEC_FAIL_IMAGE
:
11109 case EXEC_FORM_TEAM
:
11110 case EXEC_CHANGE_TEAM
:
11111 case EXEC_END_TEAM
:
11112 case EXEC_SYNC_TEAM
:
11116 /* Keep track of which entry we are up to. */
11117 current_entry_id
= code
->ext
.entry
->id
;
11121 resolve_where (code
, NULL
);
11125 if (code
->expr1
!= NULL
)
11127 if (code
->expr1
->ts
.type
!= BT_INTEGER
)
11128 gfc_error ("ASSIGNED GOTO statement at %L requires an "
11129 "INTEGER variable", &code
->expr1
->where
);
11130 else if (code
->expr1
->symtree
->n
.sym
->attr
.assign
!= 1)
11131 gfc_error ("Variable %qs has not been assigned a target "
11132 "label at %L", code
->expr1
->symtree
->n
.sym
->name
,
11133 &code
->expr1
->where
);
11136 resolve_branch (code
->label1
, code
);
11140 if (code
->expr1
!= NULL
11141 && (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
))
11142 gfc_error ("Alternate RETURN statement at %L requires a SCALAR-"
11143 "INTEGER return specifier", &code
->expr1
->where
);
11146 case EXEC_INIT_ASSIGN
:
11147 case EXEC_END_PROCEDURE
:
11154 /* Remove a GFC_ISYM_CAF_GET inserted for a coindexed variable on
11156 if (code
->expr1
->expr_type
== EXPR_FUNCTION
11157 && code
->expr1
->value
.function
.isym
11158 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
11159 remove_caf_get_intrinsic (code
->expr1
);
11161 /* If this is a pointer function in an lvalue variable context,
11162 the new code will have to be resolved afresh. This is also the
11163 case with an error, where the code is transformed into NOP to
11164 prevent ICEs downstream. */
11165 if (resolve_ptr_fcn_assign (&code
, ns
)
11166 || code
->op
== EXEC_NOP
)
11169 if (!gfc_check_vardef_context (code
->expr1
, false, false, false,
11173 if (resolve_ordinary_assign (code
, ns
))
11175 if (code
->op
== EXEC_COMPCALL
)
11181 /* Check for dependencies in deferred character length array
11182 assignments and generate a temporary, if necessary. */
11183 if (code
->op
== EXEC_ASSIGN
&& deferred_op_assign (&code
, ns
))
11186 /* F03 7.4.1.3 for non-allocatable, non-pointer components. */
11187 if (code
->op
!= EXEC_CALL
&& code
->expr1
->ts
.type
== BT_DERIVED
11188 && code
->expr1
->ts
.u
.derived
11189 && code
->expr1
->ts
.u
.derived
->attr
.defined_assign_comp
)
11190 generate_component_assignments (&code
, ns
);
11194 case EXEC_LABEL_ASSIGN
:
11195 if (code
->label1
->defined
== ST_LABEL_UNKNOWN
)
11196 gfc_error ("Label %d referenced at %L is never defined",
11197 code
->label1
->value
, &code
->label1
->where
);
11199 && (code
->expr1
->expr_type
!= EXPR_VARIABLE
11200 || code
->expr1
->symtree
->n
.sym
->ts
.type
!= BT_INTEGER
11201 || code
->expr1
->symtree
->n
.sym
->ts
.kind
11202 != gfc_default_integer_kind
11203 || code
->expr1
->symtree
->n
.sym
->as
!= NULL
))
11204 gfc_error ("ASSIGN statement at %L requires a scalar "
11205 "default INTEGER variable", &code
->expr1
->where
);
11208 case EXEC_POINTER_ASSIGN
:
11215 /* This is both a variable definition and pointer assignment
11216 context, so check both of them. For rank remapping, a final
11217 array ref may be present on the LHS and fool gfc_expr_attr
11218 used in gfc_check_vardef_context. Remove it. */
11219 e
= remove_last_array_ref (code
->expr1
);
11220 t
= gfc_check_vardef_context (e
, true, false, false,
11221 _("pointer assignment"));
11223 t
= gfc_check_vardef_context (e
, false, false, false,
11224 _("pointer assignment"));
11229 gfc_check_pointer_assign (code
->expr1
, code
->expr2
);
11231 /* Assigning a class object always is a regular assign. */
11232 if (code
->expr2
->ts
.type
== BT_CLASS
11233 && code
->expr1
->ts
.type
== BT_CLASS
11234 && !CLASS_DATA (code
->expr2
)->attr
.dimension
11235 && !(gfc_expr_attr (code
->expr1
).proc_pointer
11236 && code
->expr2
->expr_type
== EXPR_VARIABLE
11237 && code
->expr2
->symtree
->n
.sym
->attr
.flavor
11239 code
->op
= EXEC_ASSIGN
;
11243 case EXEC_ARITHMETIC_IF
:
11245 gfc_expr
*e
= code
->expr1
;
11247 gfc_resolve_expr (e
);
11248 if (e
->expr_type
== EXPR_NULL
)
11249 gfc_error ("Invalid NULL at %L", &e
->where
);
11251 if (t
&& (e
->rank
> 0
11252 || !(e
->ts
.type
== BT_REAL
|| e
->ts
.type
== BT_INTEGER
)))
11253 gfc_error ("Arithmetic IF statement at %L requires a scalar "
11254 "REAL or INTEGER expression", &e
->where
);
11256 resolve_branch (code
->label1
, code
);
11257 resolve_branch (code
->label2
, code
);
11258 resolve_branch (code
->label3
, code
);
11263 if (t
&& code
->expr1
!= NULL
11264 && (code
->expr1
->ts
.type
!= BT_LOGICAL
11265 || code
->expr1
->rank
!= 0))
11266 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
11267 &code
->expr1
->where
);
11272 resolve_call (code
);
11275 case EXEC_COMPCALL
:
11277 resolve_typebound_subroutine (code
);
11280 case EXEC_CALL_PPC
:
11281 resolve_ppc_call (code
);
11285 /* Select is complicated. Also, a SELECT construct could be
11286 a transformed computed GOTO. */
11287 resolve_select (code
, false);
11290 case EXEC_SELECT_TYPE
:
11291 resolve_select_type (code
, ns
);
11295 resolve_block_construct (code
);
11299 if (code
->ext
.iterator
!= NULL
)
11301 gfc_iterator
*iter
= code
->ext
.iterator
;
11302 if (gfc_resolve_iterator (iter
, true, false))
11303 gfc_resolve_do_iterator (code
, iter
->var
->symtree
->n
.sym
,
11308 case EXEC_DO_WHILE
:
11309 if (code
->expr1
== NULL
)
11310 gfc_internal_error ("gfc_resolve_code(): No expression on "
11313 && (code
->expr1
->rank
!= 0
11314 || code
->expr1
->ts
.type
!= BT_LOGICAL
))
11315 gfc_error ("Exit condition of DO WHILE loop at %L must be "
11316 "a scalar LOGICAL expression", &code
->expr1
->where
);
11319 case EXEC_ALLOCATE
:
11321 resolve_allocate_deallocate (code
, "ALLOCATE");
11325 case EXEC_DEALLOCATE
:
11327 resolve_allocate_deallocate (code
, "DEALLOCATE");
11332 if (!gfc_resolve_open (code
->ext
.open
))
11335 resolve_branch (code
->ext
.open
->err
, code
);
11339 if (!gfc_resolve_close (code
->ext
.close
))
11342 resolve_branch (code
->ext
.close
->err
, code
);
11345 case EXEC_BACKSPACE
:
11349 if (!gfc_resolve_filepos (code
->ext
.filepos
))
11352 resolve_branch (code
->ext
.filepos
->err
, code
);
11356 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11359 resolve_branch (code
->ext
.inquire
->err
, code
);
11362 case EXEC_IOLENGTH
:
11363 gcc_assert (code
->ext
.inquire
!= NULL
);
11364 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11367 resolve_branch (code
->ext
.inquire
->err
, code
);
11371 if (!gfc_resolve_wait (code
->ext
.wait
))
11374 resolve_branch (code
->ext
.wait
->err
, code
);
11375 resolve_branch (code
->ext
.wait
->end
, code
);
11376 resolve_branch (code
->ext
.wait
->eor
, code
);
11381 if (!gfc_resolve_dt (code
->ext
.dt
, &code
->loc
))
11384 resolve_branch (code
->ext
.dt
->err
, code
);
11385 resolve_branch (code
->ext
.dt
->end
, code
);
11386 resolve_branch (code
->ext
.dt
->eor
, code
);
11389 case EXEC_TRANSFER
:
11390 resolve_transfer (code
);
11393 case EXEC_DO_CONCURRENT
:
11395 resolve_forall_iterators (code
->ext
.forall_iterator
);
11397 if (code
->expr1
!= NULL
11398 && (code
->expr1
->ts
.type
!= BT_LOGICAL
|| code
->expr1
->rank
))
11399 gfc_error ("FORALL mask clause at %L requires a scalar LOGICAL "
11400 "expression", &code
->expr1
->where
);
11403 case EXEC_OACC_PARALLEL_LOOP
:
11404 case EXEC_OACC_PARALLEL
:
11405 case EXEC_OACC_KERNELS_LOOP
:
11406 case EXEC_OACC_KERNELS
:
11407 case EXEC_OACC_DATA
:
11408 case EXEC_OACC_HOST_DATA
:
11409 case EXEC_OACC_LOOP
:
11410 case EXEC_OACC_UPDATE
:
11411 case EXEC_OACC_WAIT
:
11412 case EXEC_OACC_CACHE
:
11413 case EXEC_OACC_ENTER_DATA
:
11414 case EXEC_OACC_EXIT_DATA
:
11415 case EXEC_OACC_ATOMIC
:
11416 case EXEC_OACC_DECLARE
:
11417 gfc_resolve_oacc_directive (code
, ns
);
11420 case EXEC_OMP_ATOMIC
:
11421 case EXEC_OMP_BARRIER
:
11422 case EXEC_OMP_CANCEL
:
11423 case EXEC_OMP_CANCELLATION_POINT
:
11424 case EXEC_OMP_CRITICAL
:
11425 case EXEC_OMP_FLUSH
:
11426 case EXEC_OMP_DISTRIBUTE
:
11427 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
11428 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
11429 case EXEC_OMP_DISTRIBUTE_SIMD
:
11431 case EXEC_OMP_DO_SIMD
:
11432 case EXEC_OMP_MASTER
:
11433 case EXEC_OMP_ORDERED
:
11434 case EXEC_OMP_SECTIONS
:
11435 case EXEC_OMP_SIMD
:
11436 case EXEC_OMP_SINGLE
:
11437 case EXEC_OMP_TARGET
:
11438 case EXEC_OMP_TARGET_DATA
:
11439 case EXEC_OMP_TARGET_ENTER_DATA
:
11440 case EXEC_OMP_TARGET_EXIT_DATA
:
11441 case EXEC_OMP_TARGET_PARALLEL
:
11442 case EXEC_OMP_TARGET_PARALLEL_DO
:
11443 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11444 case EXEC_OMP_TARGET_SIMD
:
11445 case EXEC_OMP_TARGET_TEAMS
:
11446 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11447 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11448 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11449 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11450 case EXEC_OMP_TARGET_UPDATE
:
11451 case EXEC_OMP_TASK
:
11452 case EXEC_OMP_TASKGROUP
:
11453 case EXEC_OMP_TASKLOOP
:
11454 case EXEC_OMP_TASKLOOP_SIMD
:
11455 case EXEC_OMP_TASKWAIT
:
11456 case EXEC_OMP_TASKYIELD
:
11457 case EXEC_OMP_TEAMS
:
11458 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11459 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11460 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11461 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11462 case EXEC_OMP_WORKSHARE
:
11463 gfc_resolve_omp_directive (code
, ns
);
11466 case EXEC_OMP_PARALLEL
:
11467 case EXEC_OMP_PARALLEL_DO
:
11468 case EXEC_OMP_PARALLEL_DO_SIMD
:
11469 case EXEC_OMP_PARALLEL_SECTIONS
:
11470 case EXEC_OMP_PARALLEL_WORKSHARE
:
11471 omp_workshare_save
= omp_workshare_flag
;
11472 omp_workshare_flag
= 0;
11473 gfc_resolve_omp_directive (code
, ns
);
11474 omp_workshare_flag
= omp_workshare_save
;
11478 gfc_internal_error ("gfc_resolve_code(): Bad statement code");
11482 cs_base
= frame
.prev
;
11486 /* Resolve initial values and make sure they are compatible with
11490 resolve_values (gfc_symbol
*sym
)
11494 if (sym
->value
== NULL
)
11497 if (sym
->value
->expr_type
== EXPR_STRUCTURE
)
11498 t
= resolve_structure_cons (sym
->value
, 1);
11500 t
= gfc_resolve_expr (sym
->value
);
11505 gfc_check_assign_symbol (sym
, NULL
, sym
->value
);
11509 /* Verify any BIND(C) derived types in the namespace so we can report errors
11510 for them once, rather than for each variable declared of that type. */
11513 resolve_bind_c_derived_types (gfc_symbol
*derived_sym
)
11515 if (derived_sym
!= NULL
&& derived_sym
->attr
.flavor
== FL_DERIVED
11516 && derived_sym
->attr
.is_bind_c
== 1)
11517 verify_bind_c_derived_type (derived_sym
);
11523 /* Check the interfaces of DTIO procedures associated with derived
11524 type 'sym'. These procedures can either have typebound bindings or
11525 can appear in DTIO generic interfaces. */
11528 gfc_verify_DTIO_procedures (gfc_symbol
*sym
)
11530 if (!sym
|| sym
->attr
.flavor
!= FL_DERIVED
)
11533 gfc_check_dtio_interfaces (sym
);
11538 /* Verify that any binding labels used in a given namespace do not collide
11539 with the names or binding labels of any global symbols. Multiple INTERFACE
11540 for the same procedure are permitted. */
11543 gfc_verify_binding_labels (gfc_symbol
*sym
)
11546 const char *module
;
11548 if (!sym
|| !sym
->attr
.is_bind_c
|| sym
->attr
.is_iso_c
11549 || sym
->attr
.flavor
== FL_DERIVED
|| !sym
->binding_label
)
11552 gsym
= gfc_find_case_gsymbol (gfc_gsym_root
, sym
->binding_label
);
11555 module
= sym
->module
;
11556 else if (sym
->ns
&& sym
->ns
->proc_name
11557 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
11558 module
= sym
->ns
->proc_name
->name
;
11559 else if (sym
->ns
&& sym
->ns
->parent
11560 && sym
->ns
&& sym
->ns
->parent
->proc_name
11561 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
11562 module
= sym
->ns
->parent
->proc_name
->name
;
11568 && (gsym
->type
== GSYM_FUNCTION
|| gsym
->type
== GSYM_SUBROUTINE
)))
11571 gsym
= gfc_get_gsymbol (sym
->binding_label
);
11572 gsym
->where
= sym
->declared_at
;
11573 gsym
->sym_name
= sym
->name
;
11574 gsym
->binding_label
= sym
->binding_label
;
11575 gsym
->ns
= sym
->ns
;
11576 gsym
->mod_name
= module
;
11577 if (sym
->attr
.function
)
11578 gsym
->type
= GSYM_FUNCTION
;
11579 else if (sym
->attr
.subroutine
)
11580 gsym
->type
= GSYM_SUBROUTINE
;
11581 /* Mark as variable/procedure as defined, unless its an INTERFACE. */
11582 gsym
->defined
= sym
->attr
.if_source
!= IFSRC_IFBODY
;
11586 if (sym
->attr
.flavor
== FL_VARIABLE
&& gsym
->type
!= GSYM_UNKNOWN
)
11588 gfc_error ("Variable %qs with binding label %qs at %L uses the same global "
11589 "identifier as entity at %L", sym
->name
,
11590 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11591 /* Clear the binding label to prevent checking multiple times. */
11592 sym
->binding_label
= NULL
;
11595 else if (sym
->attr
.flavor
== FL_VARIABLE
&& module
11596 && (strcmp (module
, gsym
->mod_name
) != 0
11597 || strcmp (sym
->name
, gsym
->sym_name
) != 0))
11599 /* This can only happen if the variable is defined in a module - if it
11600 isn't the same module, reject it. */
11601 gfc_error ("Variable %qs from module %qs with binding label %qs at %L "
11602 "uses the same global identifier as entity at %L from module %qs",
11603 sym
->name
, module
, sym
->binding_label
,
11604 &sym
->declared_at
, &gsym
->where
, gsym
->mod_name
);
11605 sym
->binding_label
= NULL
;
11607 else if ((sym
->attr
.function
|| sym
->attr
.subroutine
)
11608 && ((gsym
->type
!= GSYM_SUBROUTINE
&& gsym
->type
!= GSYM_FUNCTION
)
11609 || (gsym
->defined
&& sym
->attr
.if_source
!= IFSRC_IFBODY
))
11610 && sym
!= gsym
->ns
->proc_name
11611 && (module
!= gsym
->mod_name
11612 || strcmp (gsym
->sym_name
, sym
->name
) != 0
11613 || (module
&& strcmp (module
, gsym
->mod_name
) != 0)))
11615 /* Print an error if the procedure is defined multiple times; we have to
11616 exclude references to the same procedure via module association or
11617 multiple checks for the same procedure. */
11618 gfc_error ("Procedure %qs with binding label %qs at %L uses the same "
11619 "global identifier as entity at %L", sym
->name
,
11620 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11621 sym
->binding_label
= NULL
;
11626 /* Resolve an index expression. */
11629 resolve_index_expr (gfc_expr
*e
)
11631 if (!gfc_resolve_expr (e
))
11634 if (!gfc_simplify_expr (e
, 0))
11637 if (!gfc_specification_expr (e
))
11644 /* Resolve a charlen structure. */
11647 resolve_charlen (gfc_charlen
*cl
)
11650 bool saved_specification_expr
;
11656 saved_specification_expr
= specification_expr
;
11657 specification_expr
= true;
11659 if (cl
->length_from_typespec
)
11661 if (!gfc_resolve_expr (cl
->length
))
11663 specification_expr
= saved_specification_expr
;
11667 if (!gfc_simplify_expr (cl
->length
, 0))
11669 specification_expr
= saved_specification_expr
;
11673 /* cl->length has been resolved. It should have an integer type. */
11674 if (cl
->length
->ts
.type
!= BT_INTEGER
)
11676 gfc_error ("Scalar INTEGER expression expected at %L",
11677 &cl
->length
->where
);
11683 if (!resolve_index_expr (cl
->length
))
11685 specification_expr
= saved_specification_expr
;
11690 /* F2008, 4.4.3.2: If the character length parameter value evaluates to
11691 a negative value, the length of character entities declared is zero. */
11692 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11693 && mpz_sgn (cl
->length
->value
.integer
) < 0)
11694 gfc_replace_expr (cl
->length
,
11695 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 0));
11697 /* Check that the character length is not too large. */
11698 k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
11699 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11700 && cl
->length
->ts
.type
== BT_INTEGER
11701 && mpz_cmp (cl
->length
->value
.integer
, gfc_integer_kinds
[k
].huge
) > 0)
11703 gfc_error ("String length at %L is too large", &cl
->length
->where
);
11704 specification_expr
= saved_specification_expr
;
11708 specification_expr
= saved_specification_expr
;
11713 /* Test for non-constant shape arrays. */
11716 is_non_constant_shape_array (gfc_symbol
*sym
)
11722 not_constant
= false;
11723 if (sym
->as
!= NULL
)
11725 /* Unfortunately, !gfc_is_compile_time_shape hits a legal case that
11726 has not been simplified; parameter array references. Do the
11727 simplification now. */
11728 for (i
= 0; i
< sym
->as
->rank
+ sym
->as
->corank
; i
++)
11730 e
= sym
->as
->lower
[i
];
11731 if (e
&& (!resolve_index_expr(e
)
11732 || !gfc_is_constant_expr (e
)))
11733 not_constant
= true;
11734 e
= sym
->as
->upper
[i
];
11735 if (e
&& (!resolve_index_expr(e
)
11736 || !gfc_is_constant_expr (e
)))
11737 not_constant
= true;
11740 return not_constant
;
11743 /* Given a symbol and an initialization expression, add code to initialize
11744 the symbol to the function entry. */
11746 build_init_assign (gfc_symbol
*sym
, gfc_expr
*init
)
11750 gfc_namespace
*ns
= sym
->ns
;
11752 /* Search for the function namespace if this is a contained
11753 function without an explicit result. */
11754 if (sym
->attr
.function
&& sym
== sym
->result
11755 && sym
->name
!= sym
->ns
->proc_name
->name
)
11757 ns
= ns
->contained
;
11758 for (;ns
; ns
= ns
->sibling
)
11759 if (strcmp (ns
->proc_name
->name
, sym
->name
) == 0)
11765 gfc_free_expr (init
);
11769 /* Build an l-value expression for the result. */
11770 lval
= gfc_lval_expr_from_sym (sym
);
11772 /* Add the code at scope entry. */
11773 init_st
= gfc_get_code (EXEC_INIT_ASSIGN
);
11774 init_st
->next
= ns
->code
;
11775 ns
->code
= init_st
;
11777 /* Assign the default initializer to the l-value. */
11778 init_st
->loc
= sym
->declared_at
;
11779 init_st
->expr1
= lval
;
11780 init_st
->expr2
= init
;
11784 /* Whether or not we can generate a default initializer for a symbol. */
11787 can_generate_init (gfc_symbol
*sym
)
11789 symbol_attribute
*a
;
11794 /* These symbols should never have a default initialization. */
11799 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
11800 && (CLASS_DATA (sym
)->attr
.class_pointer
11801 || CLASS_DATA (sym
)->attr
.proc_pointer
))
11802 || a
->in_equivalence
11809 || (!a
->referenced
&& !a
->result
)
11810 || (a
->dummy
&& a
->intent
!= INTENT_OUT
)
11811 || (a
->function
&& sym
!= sym
->result
)
11816 /* Assign the default initializer to a derived type variable or result. */
11819 apply_default_init (gfc_symbol
*sym
)
11821 gfc_expr
*init
= NULL
;
11823 if (sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
11826 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
)
11827 init
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
11829 if (init
== NULL
&& sym
->ts
.type
!= BT_CLASS
)
11832 build_init_assign (sym
, init
);
11833 sym
->attr
.referenced
= 1;
11837 /* Build an initializer for a local. Returns null if the symbol should not have
11838 a default initialization. */
11841 build_default_init_expr (gfc_symbol
*sym
)
11843 /* These symbols should never have a default initialization. */
11844 if (sym
->attr
.allocatable
11845 || sym
->attr
.external
11847 || sym
->attr
.pointer
11848 || sym
->attr
.in_equivalence
11849 || sym
->attr
.in_common
11852 || sym
->attr
.cray_pointee
11853 || sym
->attr
.cray_pointer
11857 /* Get the appropriate init expression. */
11858 return gfc_build_default_init_expr (&sym
->ts
, &sym
->declared_at
);
11861 /* Add an initialization expression to a local variable. */
11863 apply_default_init_local (gfc_symbol
*sym
)
11865 gfc_expr
*init
= NULL
;
11867 /* The symbol should be a variable or a function return value. */
11868 if ((sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
11869 || (sym
->attr
.function
&& sym
->result
!= sym
))
11872 /* Try to build the initializer expression. If we can't initialize
11873 this symbol, then init will be NULL. */
11874 init
= build_default_init_expr (sym
);
11878 /* For saved variables, we don't want to add an initializer at function
11879 entry, so we just add a static initializer. Note that automatic variables
11880 are stack allocated even with -fno-automatic; we have also to exclude
11881 result variable, which are also nonstatic. */
11882 if (!sym
->attr
.automatic
11883 && (sym
->attr
.save
|| sym
->ns
->save_all
11884 || (flag_max_stack_var_size
== 0 && !sym
->attr
.result
11885 && (sym
->ns
->proc_name
&& !sym
->ns
->proc_name
->attr
.recursive
)
11886 && (!sym
->attr
.dimension
|| !is_non_constant_shape_array (sym
)))))
11888 /* Don't clobber an existing initializer! */
11889 gcc_assert (sym
->value
== NULL
);
11894 build_init_assign (sym
, init
);
11898 /* Resolution of common features of flavors variable and procedure. */
11901 resolve_fl_var_and_proc (gfc_symbol
*sym
, int mp_flag
)
11903 gfc_array_spec
*as
;
11905 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
11906 as
= CLASS_DATA (sym
)->as
;
11910 /* Constraints on deferred shape variable. */
11911 if (as
== NULL
|| as
->type
!= AS_DEFERRED
)
11913 bool pointer
, allocatable
, dimension
;
11915 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
11917 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
11918 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
11919 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
11923 pointer
= sym
->attr
.pointer
&& !sym
->attr
.select_type_temporary
;
11924 allocatable
= sym
->attr
.allocatable
;
11925 dimension
= sym
->attr
.dimension
;
11930 if (dimension
&& as
->type
!= AS_ASSUMED_RANK
)
11932 gfc_error ("Allocatable array %qs at %L must have a deferred "
11933 "shape or assumed rank", sym
->name
, &sym
->declared_at
);
11936 else if (!gfc_notify_std (GFC_STD_F2003
, "Scalar object "
11937 "%qs at %L may not be ALLOCATABLE",
11938 sym
->name
, &sym
->declared_at
))
11942 if (pointer
&& dimension
&& as
->type
!= AS_ASSUMED_RANK
)
11944 gfc_error ("Array pointer %qs at %L must have a deferred shape or "
11945 "assumed rank", sym
->name
, &sym
->declared_at
);
11951 if (!mp_flag
&& !sym
->attr
.allocatable
&& !sym
->attr
.pointer
11952 && sym
->ts
.type
!= BT_CLASS
&& !sym
->assoc
)
11954 gfc_error ("Array %qs at %L cannot have a deferred shape",
11955 sym
->name
, &sym
->declared_at
);
11960 /* Constraints on polymorphic variables. */
11961 if (sym
->ts
.type
== BT_CLASS
&& !(sym
->result
&& sym
->result
!= sym
))
11964 if (sym
->attr
.class_ok
11965 && !sym
->attr
.select_type_temporary
11966 && !UNLIMITED_POLY (sym
)
11967 && !gfc_type_is_extensible (CLASS_DATA (sym
)->ts
.u
.derived
))
11969 gfc_error ("Type %qs of CLASS variable %qs at %L is not extensible",
11970 CLASS_DATA (sym
)->ts
.u
.derived
->name
, sym
->name
,
11971 &sym
->declared_at
);
11976 /* Assume that use associated symbols were checked in the module ns.
11977 Class-variables that are associate-names are also something special
11978 and excepted from the test. */
11979 if (!sym
->attr
.class_ok
&& !sym
->attr
.use_assoc
&& !sym
->assoc
)
11981 gfc_error ("CLASS variable %qs at %L must be dummy, allocatable "
11982 "or pointer", sym
->name
, &sym
->declared_at
);
11991 /* Additional checks for symbols with flavor variable and derived
11992 type. To be called from resolve_fl_variable. */
11995 resolve_fl_variable_derived (gfc_symbol
*sym
, int no_init_flag
)
11997 gcc_assert (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
);
11999 /* Check to see if a derived type is blocked from being host
12000 associated by the presence of another class I symbol in the same
12001 namespace. 14.6.1.3 of the standard and the discussion on
12002 comp.lang.fortran. */
12003 if (sym
->ns
!= sym
->ts
.u
.derived
->ns
12004 && sym
->ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
12007 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 0, &s
);
12008 if (s
&& s
->attr
.generic
)
12009 s
= gfc_find_dt_in_generic (s
);
12010 if (s
&& !gfc_fl_struct (s
->attr
.flavor
))
12012 gfc_error ("The type %qs cannot be host associated at %L "
12013 "because it is blocked by an incompatible object "
12014 "of the same name declared at %L",
12015 sym
->ts
.u
.derived
->name
, &sym
->declared_at
,
12021 /* 4th constraint in section 11.3: "If an object of a type for which
12022 component-initialization is specified (R429) appears in the
12023 specification-part of a module and does not have the ALLOCATABLE
12024 or POINTER attribute, the object shall have the SAVE attribute."
12026 The check for initializers is performed with
12027 gfc_has_default_initializer because gfc_default_initializer generates
12028 a hidden default for allocatable components. */
12029 if (!(sym
->value
|| no_init_flag
) && sym
->ns
->proc_name
12030 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12031 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
) && !sym
->attr
.save
12032 && !sym
->attr
.pointer
&& !sym
->attr
.allocatable
12033 && gfc_has_default_initializer (sym
->ts
.u
.derived
)
12034 && !gfc_notify_std (GFC_STD_F2008
, "Implied SAVE for module variable "
12035 "%qs at %L, needed due to the default "
12036 "initialization", sym
->name
, &sym
->declared_at
))
12039 /* Assign default initializer. */
12040 if (!(sym
->value
|| sym
->attr
.pointer
|| sym
->attr
.allocatable
)
12041 && (!no_init_flag
|| sym
->attr
.intent
== INTENT_OUT
))
12042 sym
->value
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12048 /* F2008, C402 (R401): A colon shall not be used as a type-param-value
12049 except in the declaration of an entity or component that has the POINTER
12050 or ALLOCATABLE attribute. */
12053 deferred_requirements (gfc_symbol
*sym
)
12055 if (sym
->ts
.deferred
12056 && !(sym
->attr
.pointer
12057 || sym
->attr
.allocatable
12058 || sym
->attr
.associate_var
12059 || sym
->attr
.omp_udr_artificial_var
))
12061 gfc_error ("Entity %qs at %L has a deferred type parameter and "
12062 "requires either the POINTER or ALLOCATABLE attribute",
12063 sym
->name
, &sym
->declared_at
);
12070 /* Resolve symbols with flavor variable. */
12073 resolve_fl_variable (gfc_symbol
*sym
, int mp_flag
)
12075 int no_init_flag
, automatic_flag
;
12077 const char *auto_save_msg
;
12078 bool saved_specification_expr
;
12080 auto_save_msg
= "Automatic object %qs at %L cannot have the "
12083 if (!resolve_fl_var_and_proc (sym
, mp_flag
))
12086 /* Set this flag to check that variables are parameters of all entries.
12087 This check is effected by the call to gfc_resolve_expr through
12088 is_non_constant_shape_array. */
12089 saved_specification_expr
= specification_expr
;
12090 specification_expr
= true;
12092 if (sym
->ns
->proc_name
12093 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12094 || sym
->ns
->proc_name
->attr
.is_main_program
)
12095 && !sym
->attr
.use_assoc
12096 && !sym
->attr
.allocatable
12097 && !sym
->attr
.pointer
12098 && is_non_constant_shape_array (sym
))
12100 /* F08:C541. The shape of an array defined in a main program or module
12101 * needs to be constant. */
12102 gfc_error ("The module or main program array %qs at %L must "
12103 "have constant shape", sym
->name
, &sym
->declared_at
);
12104 specification_expr
= saved_specification_expr
;
12108 /* Constraints on deferred type parameter. */
12109 if (!deferred_requirements (sym
))
12112 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.associate_var
)
12114 /* Make sure that character string variables with assumed length are
12115 dummy arguments. */
12116 e
= sym
->ts
.u
.cl
->length
;
12117 if (e
== NULL
&& !sym
->attr
.dummy
&& !sym
->attr
.result
12118 && !sym
->ts
.deferred
&& !sym
->attr
.select_type_temporary
12119 && !sym
->attr
.omp_udr_artificial_var
)
12121 gfc_error ("Entity with assumed character length at %L must be a "
12122 "dummy argument or a PARAMETER", &sym
->declared_at
);
12123 specification_expr
= saved_specification_expr
;
12127 if (e
&& sym
->attr
.save
== SAVE_EXPLICIT
&& !gfc_is_constant_expr (e
))
12129 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12130 specification_expr
= saved_specification_expr
;
12134 if (!gfc_is_constant_expr (e
)
12135 && !(e
->expr_type
== EXPR_VARIABLE
12136 && e
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
))
12138 if (!sym
->attr
.use_assoc
&& sym
->ns
->proc_name
12139 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12140 || sym
->ns
->proc_name
->attr
.is_main_program
))
12142 gfc_error ("%qs at %L must have constant character length "
12143 "in this context", sym
->name
, &sym
->declared_at
);
12144 specification_expr
= saved_specification_expr
;
12147 if (sym
->attr
.in_common
)
12149 gfc_error ("COMMON variable %qs at %L must have constant "
12150 "character length", sym
->name
, &sym
->declared_at
);
12151 specification_expr
= saved_specification_expr
;
12157 if (sym
->value
== NULL
&& sym
->attr
.referenced
)
12158 apply_default_init_local (sym
); /* Try to apply a default initialization. */
12160 /* Determine if the symbol may not have an initializer. */
12161 no_init_flag
= automatic_flag
= 0;
12162 if (sym
->attr
.allocatable
|| sym
->attr
.external
|| sym
->attr
.dummy
12163 || sym
->attr
.intrinsic
|| sym
->attr
.result
)
12165 else if ((sym
->attr
.dimension
|| sym
->attr
.codimension
) && !sym
->attr
.pointer
12166 && is_non_constant_shape_array (sym
))
12168 no_init_flag
= automatic_flag
= 1;
12170 /* Also, they must not have the SAVE attribute.
12171 SAVE_IMPLICIT is checked below. */
12172 if (sym
->as
&& sym
->attr
.codimension
)
12174 int corank
= sym
->as
->corank
;
12175 sym
->as
->corank
= 0;
12176 no_init_flag
= automatic_flag
= is_non_constant_shape_array (sym
);
12177 sym
->as
->corank
= corank
;
12179 if (automatic_flag
&& sym
->attr
.save
== SAVE_EXPLICIT
)
12181 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12182 specification_expr
= saved_specification_expr
;
12187 /* Ensure that any initializer is simplified. */
12189 gfc_simplify_expr (sym
->value
, 1);
12191 /* Reject illegal initializers. */
12192 if (!sym
->mark
&& sym
->value
)
12194 if (sym
->attr
.allocatable
|| (sym
->ts
.type
== BT_CLASS
12195 && CLASS_DATA (sym
)->attr
.allocatable
))
12196 gfc_error ("Allocatable %qs at %L cannot have an initializer",
12197 sym
->name
, &sym
->declared_at
);
12198 else if (sym
->attr
.external
)
12199 gfc_error ("External %qs at %L cannot have an initializer",
12200 sym
->name
, &sym
->declared_at
);
12201 else if (sym
->attr
.dummy
12202 && !(sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.intent
== INTENT_OUT
))
12203 gfc_error ("Dummy %qs at %L cannot have an initializer",
12204 sym
->name
, &sym
->declared_at
);
12205 else if (sym
->attr
.intrinsic
)
12206 gfc_error ("Intrinsic %qs at %L cannot have an initializer",
12207 sym
->name
, &sym
->declared_at
);
12208 else if (sym
->attr
.result
)
12209 gfc_error ("Function result %qs at %L cannot have an initializer",
12210 sym
->name
, &sym
->declared_at
);
12211 else if (automatic_flag
)
12212 gfc_error ("Automatic array %qs at %L cannot have an initializer",
12213 sym
->name
, &sym
->declared_at
);
12215 goto no_init_error
;
12216 specification_expr
= saved_specification_expr
;
12221 if (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
)
12223 bool res
= resolve_fl_variable_derived (sym
, no_init_flag
);
12224 specification_expr
= saved_specification_expr
;
12228 specification_expr
= saved_specification_expr
;
12233 /* Compare the dummy characteristics of a module procedure interface
12234 declaration with the corresponding declaration in a submodule. */
12235 static gfc_formal_arglist
*new_formal
;
12236 static char errmsg
[200];
12239 compare_fsyms (gfc_symbol
*sym
)
12243 if (sym
== NULL
|| new_formal
== NULL
)
12246 fsym
= new_formal
->sym
;
12251 if (strcmp (sym
->name
, fsym
->name
) == 0)
12253 if (!gfc_check_dummy_characteristics (fsym
, sym
, true, errmsg
, 200))
12254 gfc_error ("%s at %L", errmsg
, &fsym
->declared_at
);
12259 /* Resolve a procedure. */
12262 resolve_fl_procedure (gfc_symbol
*sym
, int mp_flag
)
12264 gfc_formal_arglist
*arg
;
12266 if (sym
->attr
.function
12267 && !resolve_fl_var_and_proc (sym
, mp_flag
))
12270 if (sym
->ts
.type
== BT_CHARACTER
)
12272 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
12274 if (cl
&& cl
->length
&& gfc_is_constant_expr (cl
->length
)
12275 && !resolve_charlen (cl
))
12278 if ((!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
12279 && sym
->attr
.proc
== PROC_ST_FUNCTION
)
12281 gfc_error ("Character-valued statement function %qs at %L must "
12282 "have constant length", sym
->name
, &sym
->declared_at
);
12287 /* Ensure that derived type for are not of a private type. Internal
12288 module procedures are excluded by 2.2.3.3 - i.e., they are not
12289 externally accessible and can access all the objects accessible in
12291 if (!(sym
->ns
->parent
12292 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12293 && gfc_check_symbol_access (sym
))
12295 gfc_interface
*iface
;
12297 for (arg
= gfc_sym_get_dummy_args (sym
); arg
; arg
= arg
->next
)
12300 && arg
->sym
->ts
.type
== BT_DERIVED
12301 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12302 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12303 && !gfc_notify_std (GFC_STD_F2003
, "%qs is of a PRIVATE type "
12304 "and cannot be a dummy argument"
12305 " of %qs, which is PUBLIC at %L",
12306 arg
->sym
->name
, sym
->name
,
12307 &sym
->declared_at
))
12309 /* Stop this message from recurring. */
12310 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12315 /* PUBLIC interfaces may expose PRIVATE procedures that take types
12316 PRIVATE to the containing module. */
12317 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
12319 for (arg
= gfc_sym_get_dummy_args (iface
->sym
); arg
; arg
= arg
->next
)
12322 && arg
->sym
->ts
.type
== BT_DERIVED
12323 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12324 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12325 && !gfc_notify_std (GFC_STD_F2003
, "Procedure %qs in "
12326 "PUBLIC interface %qs at %L "
12327 "takes dummy arguments of %qs which "
12328 "is PRIVATE", iface
->sym
->name
,
12329 sym
->name
, &iface
->sym
->declared_at
,
12330 gfc_typename(&arg
->sym
->ts
)))
12332 /* Stop this message from recurring. */
12333 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12340 if (sym
->attr
.function
&& sym
->value
&& sym
->attr
.proc
!= PROC_ST_FUNCTION
12341 && !sym
->attr
.proc_pointer
)
12343 gfc_error ("Function %qs at %L cannot have an initializer",
12344 sym
->name
, &sym
->declared_at
);
12348 /* An external symbol may not have an initializer because it is taken to be
12349 a procedure. Exception: Procedure Pointers. */
12350 if (sym
->attr
.external
&& sym
->value
&& !sym
->attr
.proc_pointer
)
12352 gfc_error ("External object %qs at %L may not have an initializer",
12353 sym
->name
, &sym
->declared_at
);
12357 /* An elemental function is required to return a scalar 12.7.1 */
12358 if (sym
->attr
.elemental
&& sym
->attr
.function
&& sym
->as
)
12360 gfc_error ("ELEMENTAL function %qs at %L must have a scalar "
12361 "result", sym
->name
, &sym
->declared_at
);
12362 /* Reset so that the error only occurs once. */
12363 sym
->attr
.elemental
= 0;
12367 if (sym
->attr
.proc
== PROC_ST_FUNCTION
12368 && (sym
->attr
.allocatable
|| sym
->attr
.pointer
))
12370 gfc_error ("Statement function %qs at %L may not have pointer or "
12371 "allocatable attribute", sym
->name
, &sym
->declared_at
);
12375 /* 5.1.1.5 of the Standard: A function name declared with an asterisk
12376 char-len-param shall not be array-valued, pointer-valued, recursive
12377 or pure. ....snip... A character value of * may only be used in the
12378 following ways: (i) Dummy arg of procedure - dummy associates with
12379 actual length; (ii) To declare a named constant; or (iii) External
12380 function - but length must be declared in calling scoping unit. */
12381 if (sym
->attr
.function
12382 && sym
->ts
.type
== BT_CHARACTER
&& !sym
->ts
.deferred
12383 && sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
== NULL
)
12385 if ((sym
->as
&& sym
->as
->rank
) || (sym
->attr
.pointer
)
12386 || (sym
->attr
.recursive
) || (sym
->attr
.pure
))
12388 if (sym
->as
&& sym
->as
->rank
)
12389 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12390 "array-valued", sym
->name
, &sym
->declared_at
);
12392 if (sym
->attr
.pointer
)
12393 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12394 "pointer-valued", sym
->name
, &sym
->declared_at
);
12396 if (sym
->attr
.pure
)
12397 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12398 "pure", sym
->name
, &sym
->declared_at
);
12400 if (sym
->attr
.recursive
)
12401 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12402 "recursive", sym
->name
, &sym
->declared_at
);
12407 /* Appendix B.2 of the standard. Contained functions give an
12408 error anyway. Deferred character length is an F2003 feature.
12409 Don't warn on intrinsic conversion functions, which start
12410 with two underscores. */
12411 if (!sym
->attr
.contained
&& !sym
->ts
.deferred
12412 && (sym
->name
[0] != '_' || sym
->name
[1] != '_'))
12413 gfc_notify_std (GFC_STD_F95_OBS
,
12414 "CHARACTER(*) function %qs at %L",
12415 sym
->name
, &sym
->declared_at
);
12418 /* F2008, C1218. */
12419 if (sym
->attr
.elemental
)
12421 if (sym
->attr
.proc_pointer
)
12423 gfc_error ("Procedure pointer %qs at %L shall not be elemental",
12424 sym
->name
, &sym
->declared_at
);
12427 if (sym
->attr
.dummy
)
12429 gfc_error ("Dummy procedure %qs at %L shall not be elemental",
12430 sym
->name
, &sym
->declared_at
);
12435 if (sym
->attr
.is_bind_c
&& sym
->attr
.is_c_interop
!= 1)
12437 gfc_formal_arglist
*curr_arg
;
12438 int has_non_interop_arg
= 0;
12440 if (!verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
12441 sym
->common_block
))
12443 /* Clear these to prevent looking at them again if there was an
12445 sym
->attr
.is_bind_c
= 0;
12446 sym
->attr
.is_c_interop
= 0;
12447 sym
->ts
.is_c_interop
= 0;
12451 /* So far, no errors have been found. */
12452 sym
->attr
.is_c_interop
= 1;
12453 sym
->ts
.is_c_interop
= 1;
12456 curr_arg
= gfc_sym_get_dummy_args (sym
);
12457 while (curr_arg
!= NULL
)
12459 /* Skip implicitly typed dummy args here. */
12460 if (curr_arg
->sym
->attr
.implicit_type
== 0)
12461 if (!gfc_verify_c_interop_param (curr_arg
->sym
))
12462 /* If something is found to fail, record the fact so we
12463 can mark the symbol for the procedure as not being
12464 BIND(C) to try and prevent multiple errors being
12466 has_non_interop_arg
= 1;
12468 curr_arg
= curr_arg
->next
;
12471 /* See if any of the arguments were not interoperable and if so, clear
12472 the procedure symbol to prevent duplicate error messages. */
12473 if (has_non_interop_arg
!= 0)
12475 sym
->attr
.is_c_interop
= 0;
12476 sym
->ts
.is_c_interop
= 0;
12477 sym
->attr
.is_bind_c
= 0;
12481 if (!sym
->attr
.proc_pointer
)
12483 if (sym
->attr
.save
== SAVE_EXPLICIT
)
12485 gfc_error ("PROCEDURE attribute conflicts with SAVE attribute "
12486 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12489 if (sym
->attr
.intent
)
12491 gfc_error ("PROCEDURE attribute conflicts with INTENT attribute "
12492 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12495 if (sym
->attr
.subroutine
&& sym
->attr
.result
)
12497 gfc_error ("PROCEDURE attribute conflicts with RESULT attribute "
12498 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12501 if (sym
->attr
.external
&& sym
->attr
.function
&& !sym
->attr
.module_procedure
12502 && ((sym
->attr
.if_source
== IFSRC_DECL
&& !sym
->attr
.procedure
)
12503 || sym
->attr
.contained
))
12505 gfc_error ("EXTERNAL attribute conflicts with FUNCTION attribute "
12506 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12509 if (strcmp ("ppr@", sym
->name
) == 0)
12511 gfc_error ("Procedure pointer result %qs at %L "
12512 "is missing the pointer attribute",
12513 sym
->ns
->proc_name
->name
, &sym
->declared_at
);
12518 /* Assume that a procedure whose body is not known has references
12519 to external arrays. */
12520 if (sym
->attr
.if_source
!= IFSRC_DECL
)
12521 sym
->attr
.array_outer_dependency
= 1;
12523 /* Compare the characteristics of a module procedure with the
12524 interface declaration. Ideally this would be done with
12525 gfc_compare_interfaces but, at present, the formal interface
12526 cannot be copied to the ts.interface. */
12527 if (sym
->attr
.module_procedure
12528 && sym
->attr
.if_source
== IFSRC_DECL
)
12531 char name
[2*GFC_MAX_SYMBOL_LEN
+ 1];
12533 char *submodule_name
;
12534 strcpy (name
, sym
->ns
->proc_name
->name
);
12535 module_name
= strtok (name
, ".");
12536 submodule_name
= strtok (NULL
, ".");
12538 iface
= sym
->tlink
;
12541 /* Make sure that the result uses the correct charlen for deferred
12543 if (iface
&& sym
->result
12544 && iface
->ts
.type
== BT_CHARACTER
12545 && iface
->ts
.deferred
)
12546 sym
->result
->ts
.u
.cl
= iface
->ts
.u
.cl
;
12551 /* Check the procedure characteristics. */
12552 if (sym
->attr
.elemental
!= iface
->attr
.elemental
)
12554 gfc_error ("Mismatch in ELEMENTAL attribute between MODULE "
12555 "PROCEDURE at %L and its interface in %s",
12556 &sym
->declared_at
, module_name
);
12560 if (sym
->attr
.pure
!= iface
->attr
.pure
)
12562 gfc_error ("Mismatch in PURE attribute between MODULE "
12563 "PROCEDURE at %L and its interface in %s",
12564 &sym
->declared_at
, module_name
);
12568 if (sym
->attr
.recursive
!= iface
->attr
.recursive
)
12570 gfc_error ("Mismatch in RECURSIVE attribute between MODULE "
12571 "PROCEDURE at %L and its interface in %s",
12572 &sym
->declared_at
, module_name
);
12576 /* Check the result characteristics. */
12577 if (!gfc_check_result_characteristics (sym
, iface
, errmsg
, 200))
12579 gfc_error ("%s between the MODULE PROCEDURE declaration "
12580 "in MODULE %qs and the declaration at %L in "
12582 errmsg
, module_name
, &sym
->declared_at
,
12583 submodule_name
? submodule_name
: module_name
);
12588 /* Check the characteristics of the formal arguments. */
12589 if (sym
->formal
&& sym
->formal_ns
)
12591 for (arg
= sym
->formal
; arg
&& arg
->sym
; arg
= arg
->next
)
12594 gfc_traverse_ns (sym
->formal_ns
, compare_fsyms
);
12602 /* Resolve a list of finalizer procedures. That is, after they have hopefully
12603 been defined and we now know their defined arguments, check that they fulfill
12604 the requirements of the standard for procedures used as finalizers. */
12607 gfc_resolve_finalizers (gfc_symbol
* derived
, bool *finalizable
)
12609 gfc_finalizer
* list
;
12610 gfc_finalizer
** prev_link
; /* For removing wrong entries from the list. */
12611 bool result
= true;
12612 bool seen_scalar
= false;
12615 gfc_symbol
*parent
= gfc_get_derived_super_type (derived
);
12618 gfc_resolve_finalizers (parent
, finalizable
);
12620 /* Ensure that derived-type components have a their finalizers resolved. */
12621 bool has_final
= derived
->f2k_derived
&& derived
->f2k_derived
->finalizers
;
12622 for (c
= derived
->components
; c
; c
= c
->next
)
12623 if (c
->ts
.type
== BT_DERIVED
12624 && !c
->attr
.pointer
&& !c
->attr
.proc_pointer
&& !c
->attr
.allocatable
)
12626 bool has_final2
= false;
12627 if (!gfc_resolve_finalizers (c
->ts
.u
.derived
, &has_final2
))
12628 return false; /* Error. */
12629 has_final
= has_final
|| has_final2
;
12631 /* Return early if not finalizable. */
12635 *finalizable
= false;
12639 /* Walk over the list of finalizer-procedures, check them, and if any one
12640 does not fit in with the standard's definition, print an error and remove
12641 it from the list. */
12642 prev_link
= &derived
->f2k_derived
->finalizers
;
12643 for (list
= derived
->f2k_derived
->finalizers
; list
; list
= *prev_link
)
12645 gfc_formal_arglist
*dummy_args
;
12650 /* Skip this finalizer if we already resolved it. */
12651 if (list
->proc_tree
)
12653 if (list
->proc_tree
->n
.sym
->formal
->sym
->as
== NULL
12654 || list
->proc_tree
->n
.sym
->formal
->sym
->as
->rank
== 0)
12655 seen_scalar
= true;
12656 prev_link
= &(list
->next
);
12660 /* Check this exists and is a SUBROUTINE. */
12661 if (!list
->proc_sym
->attr
.subroutine
)
12663 gfc_error ("FINAL procedure %qs at %L is not a SUBROUTINE",
12664 list
->proc_sym
->name
, &list
->where
);
12668 /* We should have exactly one argument. */
12669 dummy_args
= gfc_sym_get_dummy_args (list
->proc_sym
);
12670 if (!dummy_args
|| dummy_args
->next
)
12672 gfc_error ("FINAL procedure at %L must have exactly one argument",
12676 arg
= dummy_args
->sym
;
12678 /* This argument must be of our type. */
12679 if (arg
->ts
.type
!= BT_DERIVED
|| arg
->ts
.u
.derived
!= derived
)
12681 gfc_error ("Argument of FINAL procedure at %L must be of type %qs",
12682 &arg
->declared_at
, derived
->name
);
12686 /* It must neither be a pointer nor allocatable nor optional. */
12687 if (arg
->attr
.pointer
)
12689 gfc_error ("Argument of FINAL procedure at %L must not be a POINTER",
12690 &arg
->declared_at
);
12693 if (arg
->attr
.allocatable
)
12695 gfc_error ("Argument of FINAL procedure at %L must not be"
12696 " ALLOCATABLE", &arg
->declared_at
);
12699 if (arg
->attr
.optional
)
12701 gfc_error ("Argument of FINAL procedure at %L must not be OPTIONAL",
12702 &arg
->declared_at
);
12706 /* It must not be INTENT(OUT). */
12707 if (arg
->attr
.intent
== INTENT_OUT
)
12709 gfc_error ("Argument of FINAL procedure at %L must not be"
12710 " INTENT(OUT)", &arg
->declared_at
);
12714 /* Warn if the procedure is non-scalar and not assumed shape. */
12715 if (warn_surprising
&& arg
->as
&& arg
->as
->rank
!= 0
12716 && arg
->as
->type
!= AS_ASSUMED_SHAPE
)
12717 gfc_warning (OPT_Wsurprising
,
12718 "Non-scalar FINAL procedure at %L should have assumed"
12719 " shape argument", &arg
->declared_at
);
12721 /* Check that it does not match in kind and rank with a FINAL procedure
12722 defined earlier. To really loop over the *earlier* declarations,
12723 we need to walk the tail of the list as new ones were pushed at the
12725 /* TODO: Handle kind parameters once they are implemented. */
12726 my_rank
= (arg
->as
? arg
->as
->rank
: 0);
12727 for (i
= list
->next
; i
; i
= i
->next
)
12729 gfc_formal_arglist
*dummy_args
;
12731 /* Argument list might be empty; that is an error signalled earlier,
12732 but we nevertheless continued resolving. */
12733 dummy_args
= gfc_sym_get_dummy_args (i
->proc_sym
);
12736 gfc_symbol
* i_arg
= dummy_args
->sym
;
12737 const int i_rank
= (i_arg
->as
? i_arg
->as
->rank
: 0);
12738 if (i_rank
== my_rank
)
12740 gfc_error ("FINAL procedure %qs declared at %L has the same"
12741 " rank (%d) as %qs",
12742 list
->proc_sym
->name
, &list
->where
, my_rank
,
12743 i
->proc_sym
->name
);
12749 /* Is this the/a scalar finalizer procedure? */
12751 seen_scalar
= true;
12753 /* Find the symtree for this procedure. */
12754 gcc_assert (!list
->proc_tree
);
12755 list
->proc_tree
= gfc_find_sym_in_symtree (list
->proc_sym
);
12757 prev_link
= &list
->next
;
12760 /* Remove wrong nodes immediately from the list so we don't risk any
12761 troubles in the future when they might fail later expectations. */
12764 *prev_link
= list
->next
;
12765 gfc_free_finalizer (i
);
12769 if (result
== false)
12772 /* Warn if we haven't seen a scalar finalizer procedure (but we know there
12773 were nodes in the list, must have been for arrays. It is surely a good
12774 idea to have a scalar version there if there's something to finalize. */
12775 if (warn_surprising
&& derived
->f2k_derived
->finalizers
&& !seen_scalar
)
12776 gfc_warning (OPT_Wsurprising
,
12777 "Only array FINAL procedures declared for derived type %qs"
12778 " defined at %L, suggest also scalar one",
12779 derived
->name
, &derived
->declared_at
);
12781 vtab
= gfc_find_derived_vtab (derived
);
12782 c
= vtab
->ts
.u
.derived
->components
->next
->next
->next
->next
->next
;
12783 gfc_set_sym_referenced (c
->initializer
->symtree
->n
.sym
);
12786 *finalizable
= true;
12792 /* Check if two GENERIC targets are ambiguous and emit an error is they are. */
12795 check_generic_tbp_ambiguity (gfc_tbp_generic
* t1
, gfc_tbp_generic
* t2
,
12796 const char* generic_name
, locus where
)
12798 gfc_symbol
*sym1
, *sym2
;
12799 const char *pass1
, *pass2
;
12800 gfc_formal_arglist
*dummy_args
;
12802 gcc_assert (t1
->specific
&& t2
->specific
);
12803 gcc_assert (!t1
->specific
->is_generic
);
12804 gcc_assert (!t2
->specific
->is_generic
);
12805 gcc_assert (t1
->is_operator
== t2
->is_operator
);
12807 sym1
= t1
->specific
->u
.specific
->n
.sym
;
12808 sym2
= t2
->specific
->u
.specific
->n
.sym
;
12813 /* Both must be SUBROUTINEs or both must be FUNCTIONs. */
12814 if (sym1
->attr
.subroutine
!= sym2
->attr
.subroutine
12815 || sym1
->attr
.function
!= sym2
->attr
.function
)
12817 gfc_error ("%qs and %qs can't be mixed FUNCTION/SUBROUTINE for"
12818 " GENERIC %qs at %L",
12819 sym1
->name
, sym2
->name
, generic_name
, &where
);
12823 /* Determine PASS arguments. */
12824 if (t1
->specific
->nopass
)
12826 else if (t1
->specific
->pass_arg
)
12827 pass1
= t1
->specific
->pass_arg
;
12830 dummy_args
= gfc_sym_get_dummy_args (t1
->specific
->u
.specific
->n
.sym
);
12832 pass1
= dummy_args
->sym
->name
;
12836 if (t2
->specific
->nopass
)
12838 else if (t2
->specific
->pass_arg
)
12839 pass2
= t2
->specific
->pass_arg
;
12842 dummy_args
= gfc_sym_get_dummy_args (t2
->specific
->u
.specific
->n
.sym
);
12844 pass2
= dummy_args
->sym
->name
;
12849 /* Compare the interfaces. */
12850 if (gfc_compare_interfaces (sym1
, sym2
, sym2
->name
, !t1
->is_operator
, 0,
12851 NULL
, 0, pass1
, pass2
))
12853 gfc_error ("%qs and %qs for GENERIC %qs at %L are ambiguous",
12854 sym1
->name
, sym2
->name
, generic_name
, &where
);
12862 /* Worker function for resolving a generic procedure binding; this is used to
12863 resolve GENERIC as well as user and intrinsic OPERATOR typebound procedures.
12865 The difference between those cases is finding possible inherited bindings
12866 that are overridden, as one has to look for them in tb_sym_root,
12867 tb_uop_root or tb_op, respectively. Thus the caller must already find
12868 the super-type and set p->overridden correctly. */
12871 resolve_tb_generic_targets (gfc_symbol
* super_type
,
12872 gfc_typebound_proc
* p
, const char* name
)
12874 gfc_tbp_generic
* target
;
12875 gfc_symtree
* first_target
;
12876 gfc_symtree
* inherited
;
12878 gcc_assert (p
&& p
->is_generic
);
12880 /* Try to find the specific bindings for the symtrees in our target-list. */
12881 gcc_assert (p
->u
.generic
);
12882 for (target
= p
->u
.generic
; target
; target
= target
->next
)
12883 if (!target
->specific
)
12885 gfc_typebound_proc
* overridden_tbp
;
12886 gfc_tbp_generic
* g
;
12887 const char* target_name
;
12889 target_name
= target
->specific_st
->name
;
12891 /* Defined for this type directly. */
12892 if (target
->specific_st
->n
.tb
&& !target
->specific_st
->n
.tb
->error
)
12894 target
->specific
= target
->specific_st
->n
.tb
;
12895 goto specific_found
;
12898 /* Look for an inherited specific binding. */
12901 inherited
= gfc_find_typebound_proc (super_type
, NULL
, target_name
,
12906 gcc_assert (inherited
->n
.tb
);
12907 target
->specific
= inherited
->n
.tb
;
12908 goto specific_found
;
12912 gfc_error ("Undefined specific binding %qs as target of GENERIC %qs"
12913 " at %L", target_name
, name
, &p
->where
);
12916 /* Once we've found the specific binding, check it is not ambiguous with
12917 other specifics already found or inherited for the same GENERIC. */
12919 gcc_assert (target
->specific
);
12921 /* This must really be a specific binding! */
12922 if (target
->specific
->is_generic
)
12924 gfc_error ("GENERIC %qs at %L must target a specific binding,"
12925 " %qs is GENERIC, too", name
, &p
->where
, target_name
);
12929 /* Check those already resolved on this type directly. */
12930 for (g
= p
->u
.generic
; g
; g
= g
->next
)
12931 if (g
!= target
&& g
->specific
12932 && !check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
12935 /* Check for ambiguity with inherited specific targets. */
12936 for (overridden_tbp
= p
->overridden
; overridden_tbp
;
12937 overridden_tbp
= overridden_tbp
->overridden
)
12938 if (overridden_tbp
->is_generic
)
12940 for (g
= overridden_tbp
->u
.generic
; g
; g
= g
->next
)
12942 gcc_assert (g
->specific
);
12943 if (!check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
12949 /* If we attempt to "overwrite" a specific binding, this is an error. */
12950 if (p
->overridden
&& !p
->overridden
->is_generic
)
12952 gfc_error ("GENERIC %qs at %L can't overwrite specific binding with"
12953 " the same name", name
, &p
->where
);
12957 /* Take the SUBROUTINE/FUNCTION attributes of the first specific target, as
12958 all must have the same attributes here. */
12959 first_target
= p
->u
.generic
->specific
->u
.specific
;
12960 gcc_assert (first_target
);
12961 p
->subroutine
= first_target
->n
.sym
->attr
.subroutine
;
12962 p
->function
= first_target
->n
.sym
->attr
.function
;
12968 /* Resolve a GENERIC procedure binding for a derived type. */
12971 resolve_typebound_generic (gfc_symbol
* derived
, gfc_symtree
* st
)
12973 gfc_symbol
* super_type
;
12975 /* Find the overridden binding if any. */
12976 st
->n
.tb
->overridden
= NULL
;
12977 super_type
= gfc_get_derived_super_type (derived
);
12980 gfc_symtree
* overridden
;
12981 overridden
= gfc_find_typebound_proc (super_type
, NULL
, st
->name
,
12984 if (overridden
&& overridden
->n
.tb
)
12985 st
->n
.tb
->overridden
= overridden
->n
.tb
;
12988 /* Resolve using worker function. */
12989 return resolve_tb_generic_targets (super_type
, st
->n
.tb
, st
->name
);
12993 /* Retrieve the target-procedure of an operator binding and do some checks in
12994 common for intrinsic and user-defined type-bound operators. */
12997 get_checked_tb_operator_target (gfc_tbp_generic
* target
, locus where
)
12999 gfc_symbol
* target_proc
;
13001 gcc_assert (target
->specific
&& !target
->specific
->is_generic
);
13002 target_proc
= target
->specific
->u
.specific
->n
.sym
;
13003 gcc_assert (target_proc
);
13005 /* F08:C468. All operator bindings must have a passed-object dummy argument. */
13006 if (target
->specific
->nopass
)
13008 gfc_error ("Type-bound operator at %L can't be NOPASS", &where
);
13012 return target_proc
;
13016 /* Resolve a type-bound intrinsic operator. */
13019 resolve_typebound_intrinsic_op (gfc_symbol
* derived
, gfc_intrinsic_op op
,
13020 gfc_typebound_proc
* p
)
13022 gfc_symbol
* super_type
;
13023 gfc_tbp_generic
* target
;
13025 /* If there's already an error here, do nothing (but don't fail again). */
13029 /* Operators should always be GENERIC bindings. */
13030 gcc_assert (p
->is_generic
);
13032 /* Look for an overridden binding. */
13033 super_type
= gfc_get_derived_super_type (derived
);
13034 if (super_type
&& super_type
->f2k_derived
)
13035 p
->overridden
= gfc_find_typebound_intrinsic_op (super_type
, NULL
,
13038 p
->overridden
= NULL
;
13040 /* Resolve general GENERIC properties using worker function. */
13041 if (!resolve_tb_generic_targets (super_type
, p
, gfc_op2string(op
)))
13044 /* Check the targets to be procedures of correct interface. */
13045 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13047 gfc_symbol
* target_proc
;
13049 target_proc
= get_checked_tb_operator_target (target
, p
->where
);
13053 if (!gfc_check_operator_interface (target_proc
, op
, p
->where
))
13056 /* Add target to non-typebound operator list. */
13057 if (!target
->specific
->deferred
&& !derived
->attr
.use_assoc
13058 && p
->access
!= ACCESS_PRIVATE
&& derived
->ns
== gfc_current_ns
)
13060 gfc_interface
*head
, *intr
;
13062 /* Preempt 'gfc_check_new_interface' for submodules, where the
13063 mechanism for handling module procedures winds up resolving
13064 operator interfaces twice and would otherwise cause an error. */
13065 for (intr
= derived
->ns
->op
[op
]; intr
; intr
= intr
->next
)
13066 if (intr
->sym
== target_proc
13067 && target_proc
->attr
.used_in_submodule
)
13070 if (!gfc_check_new_interface (derived
->ns
->op
[op
],
13071 target_proc
, p
->where
))
13073 head
= derived
->ns
->op
[op
];
13074 intr
= gfc_get_interface ();
13075 intr
->sym
= target_proc
;
13076 intr
->where
= p
->where
;
13078 derived
->ns
->op
[op
] = intr
;
13090 /* Resolve a type-bound user operator (tree-walker callback). */
13092 static gfc_symbol
* resolve_bindings_derived
;
13093 static bool resolve_bindings_result
;
13095 static bool check_uop_procedure (gfc_symbol
* sym
, locus where
);
13098 resolve_typebound_user_op (gfc_symtree
* stree
)
13100 gfc_symbol
* super_type
;
13101 gfc_tbp_generic
* target
;
13103 gcc_assert (stree
&& stree
->n
.tb
);
13105 if (stree
->n
.tb
->error
)
13108 /* Operators should always be GENERIC bindings. */
13109 gcc_assert (stree
->n
.tb
->is_generic
);
13111 /* Find overridden procedure, if any. */
13112 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13113 if (super_type
&& super_type
->f2k_derived
)
13115 gfc_symtree
* overridden
;
13116 overridden
= gfc_find_typebound_user_op (super_type
, NULL
,
13117 stree
->name
, true, NULL
);
13119 if (overridden
&& overridden
->n
.tb
)
13120 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13123 stree
->n
.tb
->overridden
= NULL
;
13125 /* Resolve basically using worker function. */
13126 if (!resolve_tb_generic_targets (super_type
, stree
->n
.tb
, stree
->name
))
13129 /* Check the targets to be functions of correct interface. */
13130 for (target
= stree
->n
.tb
->u
.generic
; target
; target
= target
->next
)
13132 gfc_symbol
* target_proc
;
13134 target_proc
= get_checked_tb_operator_target (target
, stree
->n
.tb
->where
);
13138 if (!check_uop_procedure (target_proc
, stree
->n
.tb
->where
))
13145 resolve_bindings_result
= false;
13146 stree
->n
.tb
->error
= 1;
13150 /* Resolve the type-bound procedures for a derived type. */
13153 resolve_typebound_procedure (gfc_symtree
* stree
)
13157 gfc_symbol
* me_arg
;
13158 gfc_symbol
* super_type
;
13159 gfc_component
* comp
;
13161 gcc_assert (stree
);
13163 /* Undefined specific symbol from GENERIC target definition. */
13167 if (stree
->n
.tb
->error
)
13170 /* If this is a GENERIC binding, use that routine. */
13171 if (stree
->n
.tb
->is_generic
)
13173 if (!resolve_typebound_generic (resolve_bindings_derived
, stree
))
13178 /* Get the target-procedure to check it. */
13179 gcc_assert (!stree
->n
.tb
->is_generic
);
13180 gcc_assert (stree
->n
.tb
->u
.specific
);
13181 proc
= stree
->n
.tb
->u
.specific
->n
.sym
;
13182 where
= stree
->n
.tb
->where
;
13184 /* Default access should already be resolved from the parser. */
13185 gcc_assert (stree
->n
.tb
->access
!= ACCESS_UNKNOWN
);
13187 if (stree
->n
.tb
->deferred
)
13189 if (!check_proc_interface (proc
, &where
))
13194 /* Check for F08:C465. */
13195 if ((!proc
->attr
.subroutine
&& !proc
->attr
.function
)
13196 || (proc
->attr
.proc
!= PROC_MODULE
13197 && proc
->attr
.if_source
!= IFSRC_IFBODY
)
13198 || proc
->attr
.abstract
)
13200 gfc_error ("%qs must be a module procedure or an external procedure with"
13201 " an explicit interface at %L", proc
->name
, &where
);
13206 stree
->n
.tb
->subroutine
= proc
->attr
.subroutine
;
13207 stree
->n
.tb
->function
= proc
->attr
.function
;
13209 /* Find the super-type of the current derived type. We could do this once and
13210 store in a global if speed is needed, but as long as not I believe this is
13211 more readable and clearer. */
13212 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13214 /* If PASS, resolve and check arguments if not already resolved / loaded
13215 from a .mod file. */
13216 if (!stree
->n
.tb
->nopass
&& stree
->n
.tb
->pass_arg_num
== 0)
13218 gfc_formal_arglist
*dummy_args
;
13220 dummy_args
= gfc_sym_get_dummy_args (proc
);
13221 if (stree
->n
.tb
->pass_arg
)
13223 gfc_formal_arglist
*i
;
13225 /* If an explicit passing argument name is given, walk the arg-list
13226 and look for it. */
13229 stree
->n
.tb
->pass_arg_num
= 1;
13230 for (i
= dummy_args
; i
; i
= i
->next
)
13232 if (!strcmp (i
->sym
->name
, stree
->n
.tb
->pass_arg
))
13237 ++stree
->n
.tb
->pass_arg_num
;
13242 gfc_error ("Procedure %qs with PASS(%s) at %L has no"
13244 proc
->name
, stree
->n
.tb
->pass_arg
, &where
,
13245 stree
->n
.tb
->pass_arg
);
13251 /* Otherwise, take the first one; there should in fact be at least
13253 stree
->n
.tb
->pass_arg_num
= 1;
13256 gfc_error ("Procedure %qs with PASS at %L must have at"
13257 " least one argument", proc
->name
, &where
);
13260 me_arg
= dummy_args
->sym
;
13263 /* Now check that the argument-type matches and the passed-object
13264 dummy argument is generally fine. */
13266 gcc_assert (me_arg
);
13268 if (me_arg
->ts
.type
!= BT_CLASS
)
13270 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13271 " at %L", proc
->name
, &where
);
13275 if (CLASS_DATA (me_arg
)->ts
.u
.derived
13276 != resolve_bindings_derived
)
13278 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13279 " the derived-type %qs", me_arg
->name
, proc
->name
,
13280 me_arg
->name
, &where
, resolve_bindings_derived
->name
);
13284 gcc_assert (me_arg
->ts
.type
== BT_CLASS
);
13285 if (CLASS_DATA (me_arg
)->as
&& CLASS_DATA (me_arg
)->as
->rank
!= 0)
13287 gfc_error ("Passed-object dummy argument of %qs at %L must be"
13288 " scalar", proc
->name
, &where
);
13291 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13293 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13294 " be ALLOCATABLE", proc
->name
, &where
);
13297 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13299 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13300 " be POINTER", proc
->name
, &where
);
13305 /* If we are extending some type, check that we don't override a procedure
13306 flagged NON_OVERRIDABLE. */
13307 stree
->n
.tb
->overridden
= NULL
;
13310 gfc_symtree
* overridden
;
13311 overridden
= gfc_find_typebound_proc (super_type
, NULL
,
13312 stree
->name
, true, NULL
);
13316 if (overridden
->n
.tb
)
13317 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13319 if (!gfc_check_typebound_override (stree
, overridden
))
13324 /* See if there's a name collision with a component directly in this type. */
13325 for (comp
= resolve_bindings_derived
->components
; comp
; comp
= comp
->next
)
13326 if (!strcmp (comp
->name
, stree
->name
))
13328 gfc_error ("Procedure %qs at %L has the same name as a component of"
13330 stree
->name
, &where
, resolve_bindings_derived
->name
);
13334 /* Try to find a name collision with an inherited component. */
13335 if (super_type
&& gfc_find_component (super_type
, stree
->name
, true, true,
13338 gfc_error ("Procedure %qs at %L has the same name as an inherited"
13339 " component of %qs",
13340 stree
->name
, &where
, resolve_bindings_derived
->name
);
13344 stree
->n
.tb
->error
= 0;
13348 resolve_bindings_result
= false;
13349 stree
->n
.tb
->error
= 1;
13354 resolve_typebound_procedures (gfc_symbol
* derived
)
13357 gfc_symbol
* super_type
;
13359 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->tb_sym_root
)
13362 super_type
= gfc_get_derived_super_type (derived
);
13364 resolve_symbol (super_type
);
13366 resolve_bindings_derived
= derived
;
13367 resolve_bindings_result
= true;
13369 if (derived
->f2k_derived
->tb_sym_root
)
13370 gfc_traverse_symtree (derived
->f2k_derived
->tb_sym_root
,
13371 &resolve_typebound_procedure
);
13373 if (derived
->f2k_derived
->tb_uop_root
)
13374 gfc_traverse_symtree (derived
->f2k_derived
->tb_uop_root
,
13375 &resolve_typebound_user_op
);
13377 for (op
= 0; op
!= GFC_INTRINSIC_OPS
; ++op
)
13379 gfc_typebound_proc
* p
= derived
->f2k_derived
->tb_op
[op
];
13380 if (p
&& !resolve_typebound_intrinsic_op (derived
,
13381 (gfc_intrinsic_op
)op
, p
))
13382 resolve_bindings_result
= false;
13385 return resolve_bindings_result
;
13389 /* Add a derived type to the dt_list. The dt_list is used in trans-types.c
13390 to give all identical derived types the same backend_decl. */
13392 add_dt_to_dt_list (gfc_symbol
*derived
)
13394 gfc_dt_list
*dt_list
;
13396 for (dt_list
= gfc_derived_types
; dt_list
; dt_list
= dt_list
->next
)
13397 if (derived
== dt_list
->derived
)
13400 dt_list
= gfc_get_dt_list ();
13401 dt_list
->next
= gfc_derived_types
;
13402 dt_list
->derived
= derived
;
13403 gfc_derived_types
= dt_list
;
13407 /* Ensure that a derived-type is really not abstract, meaning that every
13408 inherited DEFERRED binding is overridden by a non-DEFERRED one. */
13411 ensure_not_abstract_walker (gfc_symbol
* sub
, gfc_symtree
* st
)
13416 if (!ensure_not_abstract_walker (sub
, st
->left
))
13418 if (!ensure_not_abstract_walker (sub
, st
->right
))
13421 if (st
->n
.tb
&& st
->n
.tb
->deferred
)
13423 gfc_symtree
* overriding
;
13424 overriding
= gfc_find_typebound_proc (sub
, NULL
, st
->name
, true, NULL
);
13427 gcc_assert (overriding
->n
.tb
);
13428 if (overriding
->n
.tb
->deferred
)
13430 gfc_error ("Derived-type %qs declared at %L must be ABSTRACT because"
13431 " %qs is DEFERRED and not overridden",
13432 sub
->name
, &sub
->declared_at
, st
->name
);
13441 ensure_not_abstract (gfc_symbol
* sub
, gfc_symbol
* ancestor
)
13443 /* The algorithm used here is to recursively travel up the ancestry of sub
13444 and for each ancestor-type, check all bindings. If any of them is
13445 DEFERRED, look it up starting from sub and see if the found (overriding)
13446 binding is not DEFERRED.
13447 This is not the most efficient way to do this, but it should be ok and is
13448 clearer than something sophisticated. */
13450 gcc_assert (ancestor
&& !sub
->attr
.abstract
);
13452 if (!ancestor
->attr
.abstract
)
13455 /* Walk bindings of this ancestor. */
13456 if (ancestor
->f2k_derived
)
13459 t
= ensure_not_abstract_walker (sub
, ancestor
->f2k_derived
->tb_sym_root
);
13464 /* Find next ancestor type and recurse on it. */
13465 ancestor
= gfc_get_derived_super_type (ancestor
);
13467 return ensure_not_abstract (sub
, ancestor
);
13473 /* This check for typebound defined assignments is done recursively
13474 since the order in which derived types are resolved is not always in
13475 order of the declarations. */
13478 check_defined_assignments (gfc_symbol
*derived
)
13482 for (c
= derived
->components
; c
; c
= c
->next
)
13484 if (!gfc_bt_struct (c
->ts
.type
)
13486 || c
->attr
.allocatable
13487 || c
->attr
.proc_pointer_comp
13488 || c
->attr
.class_pointer
13489 || c
->attr
.proc_pointer
)
13492 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
13493 || (c
->ts
.u
.derived
->f2k_derived
13494 && c
->ts
.u
.derived
->f2k_derived
->tb_op
[INTRINSIC_ASSIGN
]))
13496 derived
->attr
.defined_assign_comp
= 1;
13500 check_defined_assignments (c
->ts
.u
.derived
);
13501 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
13503 derived
->attr
.defined_assign_comp
= 1;
13510 /* Resolve a single component of a derived type or structure. */
13513 resolve_component (gfc_component
*c
, gfc_symbol
*sym
)
13515 gfc_symbol
*super_type
;
13517 if (c
->attr
.artificial
)
13520 /* Do not allow vtype components to be resolved in nameless namespaces
13521 such as block data because the procedure pointers will cause ICEs
13522 and vtables are not needed in these contexts. */
13523 if (sym
->attr
.vtype
&& sym
->attr
.use_assoc
13524 && sym
->ns
->proc_name
== NULL
)
13528 if ((!sym
->attr
.is_class
|| c
!= sym
->components
)
13529 && c
->attr
.codimension
13530 && (!c
->attr
.allocatable
|| (c
->as
&& c
->as
->type
!= AS_DEFERRED
)))
13532 gfc_error ("Coarray component %qs at %L must be allocatable with "
13533 "deferred shape", c
->name
, &c
->loc
);
13538 if (c
->attr
.codimension
&& c
->ts
.type
== BT_DERIVED
13539 && c
->ts
.u
.derived
->ts
.is_iso_c
)
13541 gfc_error ("Component %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
13542 "shall not be a coarray", c
->name
, &c
->loc
);
13547 if (gfc_bt_struct (c
->ts
.type
) && c
->ts
.u
.derived
->attr
.coarray_comp
13548 && (c
->attr
.codimension
|| c
->attr
.pointer
|| c
->attr
.dimension
13549 || c
->attr
.allocatable
))
13551 gfc_error ("Component %qs at %L with coarray component "
13552 "shall be a nonpointer, nonallocatable scalar",
13558 if (c
->attr
.contiguous
&& (!c
->attr
.dimension
|| !c
->attr
.pointer
))
13560 gfc_error ("Component %qs at %L has the CONTIGUOUS attribute but "
13561 "is not an array pointer", c
->name
, &c
->loc
);
13565 /* F2003, 15.2.1 - length has to be one. */
13566 if (sym
->attr
.is_bind_c
&& c
->ts
.type
== BT_CHARACTER
13567 && (c
->ts
.u
.cl
== NULL
|| c
->ts
.u
.cl
->length
== NULL
13568 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
)
13569 || mpz_cmp_si (c
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
13571 gfc_error ("Component %qs of BIND(C) type at %L must have length one",
13576 if (c
->attr
.proc_pointer
&& c
->ts
.interface
)
13578 gfc_symbol
*ifc
= c
->ts
.interface
;
13580 if (!sym
->attr
.vtype
&& !check_proc_interface (ifc
, &c
->loc
))
13586 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
13588 /* Resolve interface and copy attributes. */
13589 if (ifc
->formal
&& !ifc
->formal_ns
)
13590 resolve_symbol (ifc
);
13591 if (ifc
->attr
.intrinsic
)
13592 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
13596 c
->ts
= ifc
->result
->ts
;
13597 c
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
13598 c
->attr
.pointer
= ifc
->result
->attr
.pointer
;
13599 c
->attr
.dimension
= ifc
->result
->attr
.dimension
;
13600 c
->as
= gfc_copy_array_spec (ifc
->result
->as
);
13601 c
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
13606 c
->attr
.allocatable
= ifc
->attr
.allocatable
;
13607 c
->attr
.pointer
= ifc
->attr
.pointer
;
13608 c
->attr
.dimension
= ifc
->attr
.dimension
;
13609 c
->as
= gfc_copy_array_spec (ifc
->as
);
13610 c
->attr
.class_ok
= ifc
->attr
.class_ok
;
13612 c
->ts
.interface
= ifc
;
13613 c
->attr
.function
= ifc
->attr
.function
;
13614 c
->attr
.subroutine
= ifc
->attr
.subroutine
;
13616 c
->attr
.pure
= ifc
->attr
.pure
;
13617 c
->attr
.elemental
= ifc
->attr
.elemental
;
13618 c
->attr
.recursive
= ifc
->attr
.recursive
;
13619 c
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
13620 c
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
13621 /* Copy char length. */
13622 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
13624 gfc_charlen
*cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
13625 if (cl
->length
&& !cl
->resolved
13626 && !gfc_resolve_expr (cl
->length
))
13635 else if (c
->attr
.proc_pointer
&& c
->ts
.type
== BT_UNKNOWN
)
13637 /* Since PPCs are not implicitly typed, a PPC without an explicit
13638 interface must be a subroutine. */
13639 gfc_add_subroutine (&c
->attr
, c
->name
, &c
->loc
);
13642 /* Procedure pointer components: Check PASS arg. */
13643 if (c
->attr
.proc_pointer
&& !c
->tb
->nopass
&& c
->tb
->pass_arg_num
== 0
13644 && !sym
->attr
.vtype
)
13646 gfc_symbol
* me_arg
;
13648 if (c
->tb
->pass_arg
)
13650 gfc_formal_arglist
* i
;
13652 /* If an explicit passing argument name is given, walk the arg-list
13653 and look for it. */
13656 c
->tb
->pass_arg_num
= 1;
13657 for (i
= c
->ts
.interface
->formal
; i
; i
= i
->next
)
13659 if (!strcmp (i
->sym
->name
, c
->tb
->pass_arg
))
13664 c
->tb
->pass_arg_num
++;
13669 gfc_error ("Procedure pointer component %qs with PASS(%s) "
13670 "at %L has no argument %qs", c
->name
,
13671 c
->tb
->pass_arg
, &c
->loc
, c
->tb
->pass_arg
);
13678 /* Otherwise, take the first one; there should in fact be at least
13680 c
->tb
->pass_arg_num
= 1;
13681 if (!c
->ts
.interface
->formal
)
13683 gfc_error ("Procedure pointer component %qs with PASS at %L "
13684 "must have at least one argument",
13689 me_arg
= c
->ts
.interface
->formal
->sym
;
13692 /* Now check that the argument-type matches. */
13693 gcc_assert (me_arg
);
13694 if ((me_arg
->ts
.type
!= BT_DERIVED
&& me_arg
->ts
.type
!= BT_CLASS
)
13695 || (me_arg
->ts
.type
== BT_DERIVED
&& me_arg
->ts
.u
.derived
!= sym
)
13696 || (me_arg
->ts
.type
== BT_CLASS
13697 && CLASS_DATA (me_arg
)->ts
.u
.derived
!= sym
))
13699 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13700 " the derived type %qs", me_arg
->name
, c
->name
,
13701 me_arg
->name
, &c
->loc
, sym
->name
);
13706 /* Check for C453. */
13707 if (me_arg
->attr
.dimension
)
13709 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13710 "must be scalar", me_arg
->name
, c
->name
, me_arg
->name
,
13716 if (me_arg
->attr
.pointer
)
13718 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13719 "may not have the POINTER attribute", me_arg
->name
,
13720 c
->name
, me_arg
->name
, &c
->loc
);
13725 if (me_arg
->attr
.allocatable
)
13727 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13728 "may not be ALLOCATABLE", me_arg
->name
, c
->name
,
13729 me_arg
->name
, &c
->loc
);
13734 if (gfc_type_is_extensible (sym
) && me_arg
->ts
.type
!= BT_CLASS
)
13736 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13737 " at %L", c
->name
, &c
->loc
);
13743 /* Check type-spec if this is not the parent-type component. */
13744 if (((sym
->attr
.is_class
13745 && (!sym
->components
->ts
.u
.derived
->attr
.extension
13746 || c
!= sym
->components
->ts
.u
.derived
->components
))
13747 || (!sym
->attr
.is_class
13748 && (!sym
->attr
.extension
|| c
!= sym
->components
)))
13749 && !sym
->attr
.vtype
13750 && !resolve_typespec_used (&c
->ts
, &c
->loc
, c
->name
))
13753 super_type
= gfc_get_derived_super_type (sym
);
13755 /* If this type is an extension, set the accessibility of the parent
13758 && ((sym
->attr
.is_class
13759 && c
== sym
->components
->ts
.u
.derived
->components
)
13760 || (!sym
->attr
.is_class
&& c
== sym
->components
))
13761 && strcmp (super_type
->name
, c
->name
) == 0)
13762 c
->attr
.access
= super_type
->attr
.access
;
13764 /* If this type is an extension, see if this component has the same name
13765 as an inherited type-bound procedure. */
13766 if (super_type
&& !sym
->attr
.is_class
13767 && gfc_find_typebound_proc (super_type
, NULL
, c
->name
, true, NULL
))
13769 gfc_error ("Component %qs of %qs at %L has the same name as an"
13770 " inherited type-bound procedure",
13771 c
->name
, sym
->name
, &c
->loc
);
13775 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.proc_pointer
13776 && !c
->ts
.deferred
)
13778 if (c
->ts
.u
.cl
->length
== NULL
13779 || (!resolve_charlen(c
->ts
.u
.cl
))
13780 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
))
13782 gfc_error ("Character length of component %qs needs to "
13783 "be a constant specification expression at %L",
13785 c
->ts
.u
.cl
->length
? &c
->ts
.u
.cl
->length
->where
: &c
->loc
);
13790 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.deferred
13791 && !c
->attr
.pointer
&& !c
->attr
.allocatable
)
13793 gfc_error ("Character component %qs of %qs at %L with deferred "
13794 "length must be a POINTER or ALLOCATABLE",
13795 c
->name
, sym
->name
, &c
->loc
);
13799 /* Add the hidden deferred length field. */
13800 if (c
->ts
.type
== BT_CHARACTER
13801 && (c
->ts
.deferred
|| c
->attr
.pdt_string
)
13802 && !c
->attr
.function
13803 && !sym
->attr
.is_class
)
13805 char name
[GFC_MAX_SYMBOL_LEN
+9];
13806 gfc_component
*strlen
;
13807 sprintf (name
, "_%s_length", c
->name
);
13808 strlen
= gfc_find_component (sym
, name
, true, true, NULL
);
13809 if (strlen
== NULL
)
13811 if (!gfc_add_component (sym
, name
, &strlen
))
13813 strlen
->ts
.type
= BT_INTEGER
;
13814 strlen
->ts
.kind
= gfc_charlen_int_kind
;
13815 strlen
->attr
.access
= ACCESS_PRIVATE
;
13816 strlen
->attr
.artificial
= 1;
13820 if (c
->ts
.type
== BT_DERIVED
13821 && sym
->component_access
!= ACCESS_PRIVATE
13822 && gfc_check_symbol_access (sym
)
13823 && !is_sym_host_assoc (c
->ts
.u
.derived
, sym
->ns
)
13824 && !c
->ts
.u
.derived
->attr
.use_assoc
13825 && !gfc_check_symbol_access (c
->ts
.u
.derived
)
13826 && !gfc_notify_std (GFC_STD_F2003
, "the component %qs is a "
13827 "PRIVATE type and cannot be a component of "
13828 "%qs, which is PUBLIC at %L", c
->name
,
13829 sym
->name
, &sym
->declared_at
))
13832 if ((sym
->attr
.sequence
|| sym
->attr
.is_bind_c
) && c
->ts
.type
== BT_CLASS
)
13834 gfc_error ("Polymorphic component %s at %L in SEQUENCE or BIND(C) "
13835 "type %s", c
->name
, &c
->loc
, sym
->name
);
13839 if (sym
->attr
.sequence
)
13841 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.sequence
== 0)
13843 gfc_error ("Component %s of SEQUENCE type declared at %L does "
13844 "not have the SEQUENCE attribute",
13845 c
->ts
.u
.derived
->name
, &sym
->declared_at
);
13850 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.generic
)
13851 c
->ts
.u
.derived
= gfc_find_dt_in_generic (c
->ts
.u
.derived
);
13852 else if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
13853 && CLASS_DATA (c
)->ts
.u
.derived
->attr
.generic
)
13854 CLASS_DATA (c
)->ts
.u
.derived
13855 = gfc_find_dt_in_generic (CLASS_DATA (c
)->ts
.u
.derived
);
13857 if (!sym
->attr
.is_class
&& c
->ts
.type
== BT_DERIVED
&& !sym
->attr
.vtype
13858 && c
->attr
.pointer
&& c
->ts
.u
.derived
->components
== NULL
13859 && !c
->ts
.u
.derived
->attr
.zero_comp
)
13861 gfc_error ("The pointer component %qs of %qs at %L is a type "
13862 "that has not been declared", c
->name
, sym
->name
,
13867 if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
13868 && CLASS_DATA (c
)->attr
.class_pointer
13869 && CLASS_DATA (c
)->ts
.u
.derived
->components
== NULL
13870 && !CLASS_DATA (c
)->ts
.u
.derived
->attr
.zero_comp
13871 && !UNLIMITED_POLY (c
))
13873 gfc_error ("The pointer component %qs of %qs at %L is a type "
13874 "that has not been declared", c
->name
, sym
->name
,
13879 /* If an allocatable component derived type is of the same type as
13880 the enclosing derived type, we need a vtable generating so that
13881 the __deallocate procedure is created. */
13882 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
13883 && c
->ts
.u
.derived
== sym
&& c
->attr
.allocatable
== 1)
13884 gfc_find_vtab (&c
->ts
);
13886 /* Ensure that all the derived type components are put on the
13887 derived type list; even in formal namespaces, where derived type
13888 pointer components might not have been declared. */
13889 if (c
->ts
.type
== BT_DERIVED
13891 && c
->ts
.u
.derived
->components
13893 && sym
!= c
->ts
.u
.derived
)
13894 add_dt_to_dt_list (c
->ts
.u
.derived
);
13896 if (!gfc_resolve_array_spec (c
->as
,
13897 !(c
->attr
.pointer
|| c
->attr
.proc_pointer
13898 || c
->attr
.allocatable
)))
13901 if (c
->initializer
&& !sym
->attr
.vtype
13902 && !c
->attr
.pdt_kind
&& !c
->attr
.pdt_len
13903 && !gfc_check_assign_symbol (sym
, c
, c
->initializer
))
13910 /* Be nice about the locus for a structure expression - show the locus of the
13911 first non-null sub-expression if we can. */
13914 cons_where (gfc_expr
*struct_expr
)
13916 gfc_constructor
*cons
;
13918 gcc_assert (struct_expr
&& struct_expr
->expr_type
== EXPR_STRUCTURE
);
13920 cons
= gfc_constructor_first (struct_expr
->value
.constructor
);
13921 for (; cons
; cons
= gfc_constructor_next (cons
))
13923 if (cons
->expr
&& cons
->expr
->expr_type
!= EXPR_NULL
)
13924 return &cons
->expr
->where
;
13927 return &struct_expr
->where
;
13930 /* Resolve the components of a structure type. Much less work than derived
13934 resolve_fl_struct (gfc_symbol
*sym
)
13937 gfc_expr
*init
= NULL
;
13940 /* Make sure UNIONs do not have overlapping initializers. */
13941 if (sym
->attr
.flavor
== FL_UNION
)
13943 for (c
= sym
->components
; c
; c
= c
->next
)
13945 if (init
&& c
->initializer
)
13947 gfc_error ("Conflicting initializers in union at %L and %L",
13948 cons_where (init
), cons_where (c
->initializer
));
13949 gfc_free_expr (c
->initializer
);
13950 c
->initializer
= NULL
;
13953 init
= c
->initializer
;
13958 for (c
= sym
->components
; c
; c
= c
->next
)
13959 if (!resolve_component (c
, sym
))
13965 if (sym
->components
)
13966 add_dt_to_dt_list (sym
);
13972 /* Resolve the components of a derived type. This does not have to wait until
13973 resolution stage, but can be done as soon as the dt declaration has been
13977 resolve_fl_derived0 (gfc_symbol
*sym
)
13979 gfc_symbol
* super_type
;
13981 gfc_formal_arglist
*f
;
13984 if (sym
->attr
.unlimited_polymorphic
)
13987 super_type
= gfc_get_derived_super_type (sym
);
13990 if (super_type
&& sym
->attr
.coarray_comp
&& !super_type
->attr
.coarray_comp
)
13992 gfc_error ("As extending type %qs at %L has a coarray component, "
13993 "parent type %qs shall also have one", sym
->name
,
13994 &sym
->declared_at
, super_type
->name
);
13998 /* Ensure the extended type gets resolved before we do. */
13999 if (super_type
&& !resolve_fl_derived0 (super_type
))
14002 /* An ABSTRACT type must be extensible. */
14003 if (sym
->attr
.abstract
&& !gfc_type_is_extensible (sym
))
14005 gfc_error ("Non-extensible derived-type %qs at %L must not be ABSTRACT",
14006 sym
->name
, &sym
->declared_at
);
14010 c
= (sym
->attr
.is_class
) ? sym
->components
->ts
.u
.derived
->components
14014 for ( ; c
!= NULL
; c
= c
->next
)
14015 if (!resolve_component (c
, sym
))
14021 /* Now add the caf token field, where needed. */
14022 if (flag_coarray
!= GFC_FCOARRAY_NONE
14023 && !sym
->attr
.is_class
&& !sym
->attr
.vtype
)
14025 for (c
= sym
->components
; c
; c
= c
->next
)
14026 if (!c
->attr
.dimension
&& !c
->attr
.codimension
14027 && (c
->attr
.allocatable
|| c
->attr
.pointer
))
14029 char name
[GFC_MAX_SYMBOL_LEN
+9];
14030 gfc_component
*token
;
14031 sprintf (name
, "_caf_%s", c
->name
);
14032 token
= gfc_find_component (sym
, name
, true, true, NULL
);
14035 if (!gfc_add_component (sym
, name
, &token
))
14037 token
->ts
.type
= BT_VOID
;
14038 token
->ts
.kind
= gfc_default_integer_kind
;
14039 token
->attr
.access
= ACCESS_PRIVATE
;
14040 token
->attr
.artificial
= 1;
14041 token
->attr
.caf_token
= 1;
14046 check_defined_assignments (sym
);
14048 if (!sym
->attr
.defined_assign_comp
&& super_type
)
14049 sym
->attr
.defined_assign_comp
14050 = super_type
->attr
.defined_assign_comp
;
14052 /* If this is a non-ABSTRACT type extending an ABSTRACT one, ensure that
14053 all DEFERRED bindings are overridden. */
14054 if (super_type
&& super_type
->attr
.abstract
&& !sym
->attr
.abstract
14055 && !sym
->attr
.is_class
14056 && !ensure_not_abstract (sym
, super_type
))
14059 /* Check that there is a component for every PDT parameter. */
14060 if (sym
->attr
.pdt_template
)
14062 for (f
= sym
->formal
; f
; f
= f
->next
)
14066 c
= gfc_find_component (sym
, f
->sym
->name
, true, true, NULL
);
14069 gfc_error ("Parameterized type %qs does not have a component "
14070 "corresponding to parameter %qs at %L", sym
->name
,
14071 f
->sym
->name
, &sym
->declared_at
);
14077 /* Add derived type to the derived type list. */
14078 add_dt_to_dt_list (sym
);
14084 /* The following procedure does the full resolution of a derived type,
14085 including resolution of all type-bound procedures (if present). In contrast
14086 to 'resolve_fl_derived0' this can only be done after the module has been
14087 parsed completely. */
14090 resolve_fl_derived (gfc_symbol
*sym
)
14092 gfc_symbol
*gen_dt
= NULL
;
14094 if (sym
->attr
.unlimited_polymorphic
)
14097 if (!sym
->attr
.is_class
)
14098 gfc_find_symbol (sym
->name
, sym
->ns
, 0, &gen_dt
);
14099 if (gen_dt
&& gen_dt
->generic
&& gen_dt
->generic
->next
14100 && (!gen_dt
->generic
->sym
->attr
.use_assoc
14101 || gen_dt
->generic
->sym
->module
!= gen_dt
->generic
->next
->sym
->module
)
14102 && !gfc_notify_std (GFC_STD_F2003
, "Generic name %qs of function "
14103 "%qs at %L being the same name as derived "
14104 "type at %L", sym
->name
,
14105 gen_dt
->generic
->sym
== sym
14106 ? gen_dt
->generic
->next
->sym
->name
14107 : gen_dt
->generic
->sym
->name
,
14108 gen_dt
->generic
->sym
== sym
14109 ? &gen_dt
->generic
->next
->sym
->declared_at
14110 : &gen_dt
->generic
->sym
->declared_at
,
14111 &sym
->declared_at
))
14114 /* Resolve the finalizer procedures. */
14115 if (!gfc_resolve_finalizers (sym
, NULL
))
14118 if (sym
->attr
.is_class
&& sym
->ts
.u
.derived
== NULL
)
14120 /* Fix up incomplete CLASS symbols. */
14121 gfc_component
*data
= gfc_find_component (sym
, "_data", true, true, NULL
);
14122 gfc_component
*vptr
= gfc_find_component (sym
, "_vptr", true, true, NULL
);
14124 /* Nothing more to do for unlimited polymorphic entities. */
14125 if (data
->ts
.u
.derived
->attr
.unlimited_polymorphic
)
14127 else if (vptr
->ts
.u
.derived
== NULL
)
14129 gfc_symbol
*vtab
= gfc_find_derived_vtab (data
->ts
.u
.derived
);
14131 vptr
->ts
.u
.derived
= vtab
->ts
.u
.derived
;
14132 if (!resolve_fl_derived0 (vptr
->ts
.u
.derived
))
14137 if (!resolve_fl_derived0 (sym
))
14140 /* Resolve the type-bound procedures. */
14141 if (!resolve_typebound_procedures (sym
))
14144 /* Generate module vtables subject to their accessibility and their not
14145 being vtables or pdt templates. If this is not done class declarations
14146 in external procedures wind up with their own version and so SELECT TYPE
14147 fails because the vptrs do not have the same address. */
14148 if (gfc_option
.allow_std
& GFC_STD_F2003
14149 && sym
->ns
->proc_name
14150 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14151 && sym
->attr
.access
!= ACCESS_PRIVATE
14152 && !(sym
->attr
.use_assoc
|| sym
->attr
.vtype
|| sym
->attr
.pdt_template
))
14154 gfc_symbol
*vtab
= gfc_find_derived_vtab (sym
);
14155 gfc_set_sym_referenced (vtab
);
14163 resolve_fl_namelist (gfc_symbol
*sym
)
14168 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14170 /* Check again, the check in match only works if NAMELIST comes
14172 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SIZE
)
14174 gfc_error ("Assumed size array %qs in namelist %qs at %L is not "
14175 "allowed", nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14179 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SHAPE
14180 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14181 "with assumed shape in namelist %qs at %L",
14182 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14185 if (is_non_constant_shape_array (nl
->sym
)
14186 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14187 "with nonconstant shape in namelist %qs at %L",
14188 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14191 if (nl
->sym
->ts
.type
== BT_CHARACTER
14192 && (nl
->sym
->ts
.u
.cl
->length
== NULL
14193 || !gfc_is_constant_expr (nl
->sym
->ts
.u
.cl
->length
))
14194 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs with "
14195 "nonconstant character length in "
14196 "namelist %qs at %L", nl
->sym
->name
,
14197 sym
->name
, &sym
->declared_at
))
14202 /* Reject PRIVATE objects in a PUBLIC namelist. */
14203 if (gfc_check_symbol_access (sym
))
14205 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14207 if (!nl
->sym
->attr
.use_assoc
14208 && !is_sym_host_assoc (nl
->sym
, sym
->ns
)
14209 && !gfc_check_symbol_access (nl
->sym
))
14211 gfc_error ("NAMELIST object %qs was declared PRIVATE and "
14212 "cannot be member of PUBLIC namelist %qs at %L",
14213 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14217 if (nl
->sym
->ts
.type
== BT_DERIVED
14218 && (nl
->sym
->ts
.u
.derived
->attr
.alloc_comp
14219 || nl
->sym
->ts
.u
.derived
->attr
.pointer_comp
))
14221 if (!gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs in "
14222 "namelist %qs at %L with ALLOCATABLE "
14223 "or POINTER components", nl
->sym
->name
,
14224 sym
->name
, &sym
->declared_at
))
14229 /* Types with private components that came here by USE-association. */
14230 if (nl
->sym
->ts
.type
== BT_DERIVED
14231 && derived_inaccessible (nl
->sym
->ts
.u
.derived
))
14233 gfc_error ("NAMELIST object %qs has use-associated PRIVATE "
14234 "components and cannot be member of namelist %qs at %L",
14235 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14239 /* Types with private components that are defined in the same module. */
14240 if (nl
->sym
->ts
.type
== BT_DERIVED
14241 && !is_sym_host_assoc (nl
->sym
->ts
.u
.derived
, sym
->ns
)
14242 && nl
->sym
->ts
.u
.derived
->attr
.private_comp
)
14244 gfc_error ("NAMELIST object %qs has PRIVATE components and "
14245 "cannot be a member of PUBLIC namelist %qs at %L",
14246 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14253 /* 14.1.2 A module or internal procedure represent local entities
14254 of the same type as a namelist member and so are not allowed. */
14255 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14257 if (nl
->sym
->ts
.kind
!= 0 && nl
->sym
->attr
.flavor
== FL_VARIABLE
)
14260 if (nl
->sym
->attr
.function
&& nl
->sym
== nl
->sym
->result
)
14261 if ((nl
->sym
== sym
->ns
->proc_name
)
14263 (sym
->ns
->parent
&& nl
->sym
== sym
->ns
->parent
->proc_name
))
14268 gfc_find_symbol (nl
->sym
->name
, sym
->ns
, 1, &nlsym
);
14269 if (nlsym
&& nlsym
->attr
.flavor
== FL_PROCEDURE
)
14271 gfc_error ("PROCEDURE attribute conflicts with NAMELIST "
14272 "attribute in %qs at %L", nlsym
->name
,
14273 &sym
->declared_at
);
14280 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14281 nl
->sym
->attr
.asynchronous
= 1;
14288 resolve_fl_parameter (gfc_symbol
*sym
)
14290 /* A parameter array's shape needs to be constant. */
14291 if (sym
->as
!= NULL
14292 && (sym
->as
->type
== AS_DEFERRED
14293 || is_non_constant_shape_array (sym
)))
14295 gfc_error ("Parameter array %qs at %L cannot be automatic "
14296 "or of deferred shape", sym
->name
, &sym
->declared_at
);
14300 /* Constraints on deferred type parameter. */
14301 if (!deferred_requirements (sym
))
14304 /* Make sure a parameter that has been implicitly typed still
14305 matches the implicit type, since PARAMETER statements can precede
14306 IMPLICIT statements. */
14307 if (sym
->attr
.implicit_type
14308 && !gfc_compare_types (&sym
->ts
, gfc_get_default_type (sym
->name
,
14311 gfc_error ("Implicitly typed PARAMETER %qs at %L doesn't match a "
14312 "later IMPLICIT type", sym
->name
, &sym
->declared_at
);
14316 /* Make sure the types of derived parameters are consistent. This
14317 type checking is deferred until resolution because the type may
14318 refer to a derived type from the host. */
14319 if (sym
->ts
.type
== BT_DERIVED
14320 && !gfc_compare_types (&sym
->ts
, &sym
->value
->ts
))
14322 gfc_error ("Incompatible derived type in PARAMETER at %L",
14323 &sym
->value
->where
);
14327 /* F03:C509,C514. */
14328 if (sym
->ts
.type
== BT_CLASS
)
14330 gfc_error ("CLASS variable %qs at %L cannot have the PARAMETER attribute",
14331 sym
->name
, &sym
->declared_at
);
14339 /* Called by resolve_symbol to check PDTs. */
14342 resolve_pdt (gfc_symbol
* sym
)
14344 gfc_symbol
*derived
= NULL
;
14345 gfc_actual_arglist
*param
;
14347 bool const_len_exprs
= true;
14348 bool assumed_len_exprs
= false;
14349 symbol_attribute
*attr
;
14351 if (sym
->ts
.type
== BT_DERIVED
)
14353 derived
= sym
->ts
.u
.derived
;
14354 attr
= &(sym
->attr
);
14356 else if (sym
->ts
.type
== BT_CLASS
)
14358 derived
= CLASS_DATA (sym
)->ts
.u
.derived
;
14359 attr
= &(CLASS_DATA (sym
)->attr
);
14362 gcc_unreachable ();
14364 gcc_assert (derived
->attr
.pdt_type
);
14366 for (param
= sym
->param_list
; param
; param
= param
->next
)
14368 c
= gfc_find_component (derived
, param
->name
, false, true, NULL
);
14370 if (c
->attr
.pdt_kind
)
14373 if (param
->expr
&& !gfc_is_constant_expr (param
->expr
)
14374 && c
->attr
.pdt_len
)
14375 const_len_exprs
= false;
14376 else if (param
->spec_type
== SPEC_ASSUMED
)
14377 assumed_len_exprs
= true;
14379 if (param
->spec_type
== SPEC_DEFERRED
14380 && !attr
->allocatable
&& !attr
->pointer
)
14381 gfc_error ("The object %qs at %L has a deferred LEN "
14382 "parameter %qs and is neither allocatable "
14383 "nor a pointer", sym
->name
, &sym
->declared_at
,
14388 if (!const_len_exprs
14389 && (sym
->ns
->proc_name
->attr
.is_main_program
14390 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14391 || sym
->attr
.save
!= SAVE_NONE
))
14392 gfc_error ("The AUTOMATIC object %qs at %L must not have the "
14393 "SAVE attribute or be a variable declared in the "
14394 "main program, a module or a submodule(F08/C513)",
14395 sym
->name
, &sym
->declared_at
);
14397 if (assumed_len_exprs
&& !(sym
->attr
.dummy
14398 || sym
->attr
.select_type_temporary
|| sym
->attr
.associate_var
))
14399 gfc_error ("The object %qs at %L with ASSUMED type parameters "
14400 "must be a dummy or a SELECT TYPE selector(F08/4.2)",
14401 sym
->name
, &sym
->declared_at
);
14405 /* Do anything necessary to resolve a symbol. Right now, we just
14406 assume that an otherwise unknown symbol is a variable. This sort
14407 of thing commonly happens for symbols in module. */
14410 resolve_symbol (gfc_symbol
*sym
)
14412 int check_constant
, mp_flag
;
14413 gfc_symtree
*symtree
;
14414 gfc_symtree
*this_symtree
;
14417 symbol_attribute class_attr
;
14418 gfc_array_spec
*as
;
14419 bool saved_specification_expr
;
14425 /* No symbol will ever have union type; only components can be unions.
14426 Union type declaration symbols have type BT_UNKNOWN but flavor FL_UNION
14427 (just like derived type declaration symbols have flavor FL_DERIVED). */
14428 gcc_assert (sym
->ts
.type
!= BT_UNION
);
14430 /* Coarrayed polymorphic objects with allocatable or pointer components are
14431 yet unsupported for -fcoarray=lib. */
14432 if (flag_coarray
== GFC_FCOARRAY_LIB
&& sym
->ts
.type
== BT_CLASS
14433 && sym
->ts
.u
.derived
&& CLASS_DATA (sym
)
14434 && CLASS_DATA (sym
)->attr
.codimension
14435 && (CLASS_DATA (sym
)->ts
.u
.derived
->attr
.alloc_comp
14436 || CLASS_DATA (sym
)->ts
.u
.derived
->attr
.pointer_comp
))
14438 gfc_error ("Sorry, allocatable/pointer components in polymorphic (CLASS) "
14439 "type coarrays at %L are unsupported", &sym
->declared_at
);
14443 if (sym
->attr
.artificial
)
14446 if (sym
->attr
.unlimited_polymorphic
)
14449 if (sym
->attr
.flavor
== FL_UNKNOWN
14450 || (sym
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.intrinsic
14451 && !sym
->attr
.generic
&& !sym
->attr
.external
14452 && sym
->attr
.if_source
== IFSRC_UNKNOWN
14453 && sym
->ts
.type
== BT_UNKNOWN
))
14456 /* If we find that a flavorless symbol is an interface in one of the
14457 parent namespaces, find its symtree in this namespace, free the
14458 symbol and set the symtree to point to the interface symbol. */
14459 for (ns
= gfc_current_ns
->parent
; ns
; ns
= ns
->parent
)
14461 symtree
= gfc_find_symtree (ns
->sym_root
, sym
->name
);
14462 if (symtree
&& (symtree
->n
.sym
->generic
||
14463 (symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
14464 && sym
->ns
->construct_entities
)))
14466 this_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
14468 if (this_symtree
->n
.sym
== sym
)
14470 symtree
->n
.sym
->refs
++;
14471 gfc_release_symbol (sym
);
14472 this_symtree
->n
.sym
= symtree
->n
.sym
;
14478 /* Otherwise give it a flavor according to such attributes as
14480 if (sym
->attr
.flavor
== FL_UNKNOWN
&& sym
->attr
.external
== 0
14481 && sym
->attr
.intrinsic
== 0)
14482 sym
->attr
.flavor
= FL_VARIABLE
;
14483 else if (sym
->attr
.flavor
== FL_UNKNOWN
)
14485 sym
->attr
.flavor
= FL_PROCEDURE
;
14486 if (sym
->attr
.dimension
)
14487 sym
->attr
.function
= 1;
14491 if (sym
->attr
.external
&& sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.function
)
14492 gfc_add_function (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14494 if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
14495 && !resolve_procedure_interface (sym
))
14498 if (sym
->attr
.is_protected
&& !sym
->attr
.proc_pointer
14499 && (sym
->attr
.procedure
|| sym
->attr
.external
))
14501 if (sym
->attr
.external
)
14502 gfc_error ("PROTECTED attribute conflicts with EXTERNAL attribute "
14503 "at %L", &sym
->declared_at
);
14505 gfc_error ("PROCEDURE attribute conflicts with PROTECTED attribute "
14506 "at %L", &sym
->declared_at
);
14511 if (sym
->attr
.flavor
== FL_DERIVED
&& !resolve_fl_derived (sym
))
14514 else if ((sym
->attr
.flavor
== FL_STRUCT
|| sym
->attr
.flavor
== FL_UNION
)
14515 && !resolve_fl_struct (sym
))
14518 /* Symbols that are module procedures with results (functions) have
14519 the types and array specification copied for type checking in
14520 procedures that call them, as well as for saving to a module
14521 file. These symbols can't stand the scrutiny that their results
14523 mp_flag
= (sym
->result
!= NULL
&& sym
->result
!= sym
);
14525 /* Make sure that the intrinsic is consistent with its internal
14526 representation. This needs to be done before assigning a default
14527 type to avoid spurious warnings. */
14528 if (sym
->attr
.flavor
!= FL_MODULE
&& sym
->attr
.intrinsic
14529 && !gfc_resolve_intrinsic (sym
, &sym
->declared_at
))
14532 /* Resolve associate names. */
14534 resolve_assoc_var (sym
, true);
14536 /* Assign default type to symbols that need one and don't have one. */
14537 if (sym
->ts
.type
== BT_UNKNOWN
)
14539 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
)
14541 gfc_set_default_type (sym
, 1, NULL
);
14544 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.external
14545 && !sym
->attr
.function
&& !sym
->attr
.subroutine
14546 && gfc_get_default_type (sym
->name
, sym
->ns
)->type
== BT_UNKNOWN
)
14547 gfc_add_subroutine (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14549 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14551 /* The specific case of an external procedure should emit an error
14552 in the case that there is no implicit type. */
14555 if (!sym
->attr
.mixed_entry_master
)
14556 gfc_set_default_type (sym
, sym
->attr
.external
, NULL
);
14560 /* Result may be in another namespace. */
14561 resolve_symbol (sym
->result
);
14563 if (!sym
->result
->attr
.proc_pointer
)
14565 sym
->ts
= sym
->result
->ts
;
14566 sym
->as
= gfc_copy_array_spec (sym
->result
->as
);
14567 sym
->attr
.dimension
= sym
->result
->attr
.dimension
;
14568 sym
->attr
.pointer
= sym
->result
->attr
.pointer
;
14569 sym
->attr
.allocatable
= sym
->result
->attr
.allocatable
;
14570 sym
->attr
.contiguous
= sym
->result
->attr
.contiguous
;
14575 else if (mp_flag
&& sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14577 bool saved_specification_expr
= specification_expr
;
14578 specification_expr
= true;
14579 gfc_resolve_array_spec (sym
->result
->as
, false);
14580 specification_expr
= saved_specification_expr
;
14583 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
14585 as
= CLASS_DATA (sym
)->as
;
14586 class_attr
= CLASS_DATA (sym
)->attr
;
14587 class_attr
.pointer
= class_attr
.class_pointer
;
14591 class_attr
= sym
->attr
;
14596 if (sym
->attr
.contiguous
14597 && (!class_attr
.dimension
14598 || (as
->type
!= AS_ASSUMED_SHAPE
&& as
->type
!= AS_ASSUMED_RANK
14599 && !class_attr
.pointer
)))
14601 gfc_error ("%qs at %L has the CONTIGUOUS attribute but is not an "
14602 "array pointer or an assumed-shape or assumed-rank array",
14603 sym
->name
, &sym
->declared_at
);
14607 /* Assumed size arrays and assumed shape arrays must be dummy
14608 arguments. Array-spec's of implied-shape should have been resolved to
14609 AS_EXPLICIT already. */
14613 /* If AS_IMPLIED_SHAPE makes it to here, it must be a bad
14614 specification expression. */
14615 if (as
->type
== AS_IMPLIED_SHAPE
)
14618 for (i
=0; i
<as
->rank
; i
++)
14620 if (as
->lower
[i
] != NULL
&& as
->upper
[i
] == NULL
)
14622 gfc_error ("Bad specification for assumed size array at %L",
14623 &as
->lower
[i
]->where
);
14630 if (((as
->type
== AS_ASSUMED_SIZE
&& !as
->cp_was_assumed
)
14631 || as
->type
== AS_ASSUMED_SHAPE
)
14632 && !sym
->attr
.dummy
&& !sym
->attr
.select_type_temporary
)
14634 if (as
->type
== AS_ASSUMED_SIZE
)
14635 gfc_error ("Assumed size array at %L must be a dummy argument",
14636 &sym
->declared_at
);
14638 gfc_error ("Assumed shape array at %L must be a dummy argument",
14639 &sym
->declared_at
);
14642 /* TS 29113, C535a. */
14643 if (as
->type
== AS_ASSUMED_RANK
&& !sym
->attr
.dummy
14644 && !sym
->attr
.select_type_temporary
)
14646 gfc_error ("Assumed-rank array at %L must be a dummy argument",
14647 &sym
->declared_at
);
14650 if (as
->type
== AS_ASSUMED_RANK
14651 && (sym
->attr
.codimension
|| sym
->attr
.value
))
14653 gfc_error ("Assumed-rank array at %L may not have the VALUE or "
14654 "CODIMENSION attribute", &sym
->declared_at
);
14659 /* Make sure symbols with known intent or optional are really dummy
14660 variable. Because of ENTRY statement, this has to be deferred
14661 until resolution time. */
14663 if (!sym
->attr
.dummy
14664 && (sym
->attr
.optional
|| sym
->attr
.intent
!= INTENT_UNKNOWN
))
14666 gfc_error ("Symbol at %L is not a DUMMY variable", &sym
->declared_at
);
14670 if (sym
->attr
.value
&& !sym
->attr
.dummy
)
14672 gfc_error ("%qs at %L cannot have the VALUE attribute because "
14673 "it is not a dummy argument", sym
->name
, &sym
->declared_at
);
14677 if (sym
->attr
.value
&& sym
->ts
.type
== BT_CHARACTER
)
14679 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
14680 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
14682 gfc_error ("Character dummy variable %qs at %L with VALUE "
14683 "attribute must have constant length",
14684 sym
->name
, &sym
->declared_at
);
14688 if (sym
->ts
.is_c_interop
14689 && mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
14691 gfc_error ("C interoperable character dummy variable %qs at %L "
14692 "with VALUE attribute must have length one",
14693 sym
->name
, &sym
->declared_at
);
14698 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
14699 && sym
->ts
.u
.derived
->attr
.generic
)
14701 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
14702 if (!sym
->ts
.u
.derived
)
14704 gfc_error ("The derived type %qs at %L is of type %qs, "
14705 "which has not been defined", sym
->name
,
14706 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
14707 sym
->ts
.type
= BT_UNKNOWN
;
14712 /* Use the same constraints as TYPE(*), except for the type check
14713 and that only scalars and assumed-size arrays are permitted. */
14714 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
14716 if (!sym
->attr
.dummy
)
14718 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14719 "a dummy argument", sym
->name
, &sym
->declared_at
);
14723 if (sym
->ts
.type
!= BT_ASSUMED
&& sym
->ts
.type
!= BT_INTEGER
14724 && sym
->ts
.type
!= BT_REAL
&& sym
->ts
.type
!= BT_LOGICAL
14725 && sym
->ts
.type
!= BT_COMPLEX
)
14727 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14728 "of type TYPE(*) or of an numeric intrinsic type",
14729 sym
->name
, &sym
->declared_at
);
14733 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
14734 || sym
->attr
.pointer
|| sym
->attr
.value
)
14736 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
14737 "have the ALLOCATABLE, CODIMENSION, POINTER or VALUE "
14738 "attribute", sym
->name
, &sym
->declared_at
);
14742 if (sym
->attr
.intent
== INTENT_OUT
)
14744 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
14745 "have the INTENT(OUT) attribute",
14746 sym
->name
, &sym
->declared_at
);
14749 if (sym
->attr
.dimension
&& sym
->as
->type
!= AS_ASSUMED_SIZE
)
14751 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall "
14752 "either be a scalar or an assumed-size array",
14753 sym
->name
, &sym
->declared_at
);
14757 /* Set the type to TYPE(*) and add a dimension(*) to ensure
14758 NO_ARG_CHECK is correctly handled in trans*.c, e.g. with
14760 sym
->ts
.type
= BT_ASSUMED
;
14761 sym
->as
= gfc_get_array_spec ();
14762 sym
->as
->type
= AS_ASSUMED_SIZE
;
14764 sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
14766 else if (sym
->ts
.type
== BT_ASSUMED
)
14768 /* TS 29113, C407a. */
14769 if (!sym
->attr
.dummy
)
14771 gfc_error ("Assumed type of variable %s at %L is only permitted "
14772 "for dummy variables", sym
->name
, &sym
->declared_at
);
14775 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
14776 || sym
->attr
.pointer
|| sym
->attr
.value
)
14778 gfc_error ("Assumed-type variable %s at %L may not have the "
14779 "ALLOCATABLE, CODIMENSION, POINTER or VALUE attribute",
14780 sym
->name
, &sym
->declared_at
);
14783 if (sym
->attr
.intent
== INTENT_OUT
)
14785 gfc_error ("Assumed-type variable %s at %L may not have the "
14786 "INTENT(OUT) attribute",
14787 sym
->name
, &sym
->declared_at
);
14790 if (sym
->attr
.dimension
&& sym
->as
->type
== AS_EXPLICIT
)
14792 gfc_error ("Assumed-type variable %s at %L shall not be an "
14793 "explicit-shape array", sym
->name
, &sym
->declared_at
);
14798 /* If the symbol is marked as bind(c), that it is declared at module level
14799 scope and verify its type and kind. Do not do the latter for symbols
14800 that are implicitly typed because that is handled in
14801 gfc_set_default_type. Handle dummy arguments and procedure definitions
14802 separately. Also, anything that is use associated is not handled here
14803 but instead is handled in the module it is declared in. Finally, derived
14804 type definitions are allowed to be BIND(C) since that only implies that
14805 they're interoperable, and they are checked fully for interoperability
14806 when a variable is declared of that type. */
14807 if (sym
->attr
.is_bind_c
&& sym
->attr
.use_assoc
== 0
14808 && sym
->attr
.dummy
== 0 && sym
->attr
.flavor
!= FL_PROCEDURE
14809 && sym
->attr
.flavor
!= FL_DERIVED
)
14813 /* First, make sure the variable is declared at the
14814 module-level scope (J3/04-007, Section 15.3). */
14815 if (sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
&&
14816 sym
->attr
.in_common
== 0)
14818 gfc_error ("Variable %qs at %L cannot be BIND(C) because it "
14819 "is neither a COMMON block nor declared at the "
14820 "module level scope", sym
->name
, &(sym
->declared_at
));
14823 else if (sym
->ts
.type
== BT_CHARACTER
14824 && (sym
->ts
.u
.cl
== NULL
|| sym
->ts
.u
.cl
->length
== NULL
14825 || !gfc_is_constant_expr (sym
->ts
.u
.cl
->length
)
14826 || mpz_cmp_si (sym
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
14828 gfc_error ("BIND(C) Variable %qs at %L must have length one",
14829 sym
->name
, &sym
->declared_at
);
14832 else if (sym
->common_head
!= NULL
&& sym
->attr
.implicit_type
== 0)
14834 t
= verify_com_block_vars_c_interop (sym
->common_head
);
14836 else if (sym
->attr
.implicit_type
== 0)
14838 /* If type() declaration, we need to verify that the components
14839 of the given type are all C interoperable, etc. */
14840 if (sym
->ts
.type
== BT_DERIVED
&&
14841 sym
->ts
.u
.derived
->attr
.is_c_interop
!= 1)
14843 /* Make sure the user marked the derived type as BIND(C). If
14844 not, call the verify routine. This could print an error
14845 for the derived type more than once if multiple variables
14846 of that type are declared. */
14847 if (sym
->ts
.u
.derived
->attr
.is_bind_c
!= 1)
14848 verify_bind_c_derived_type (sym
->ts
.u
.derived
);
14852 /* Verify the variable itself as C interoperable if it
14853 is BIND(C). It is not possible for this to succeed if
14854 the verify_bind_c_derived_type failed, so don't have to handle
14855 any error returned by verify_bind_c_derived_type. */
14856 t
= verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
14857 sym
->common_block
);
14862 /* clear the is_bind_c flag to prevent reporting errors more than
14863 once if something failed. */
14864 sym
->attr
.is_bind_c
= 0;
14869 /* If a derived type symbol has reached this point, without its
14870 type being declared, we have an error. Notice that most
14871 conditions that produce undefined derived types have already
14872 been dealt with. However, the likes of:
14873 implicit type(t) (t) ..... call foo (t) will get us here if
14874 the type is not declared in the scope of the implicit
14875 statement. Change the type to BT_UNKNOWN, both because it is so
14876 and to prevent an ICE. */
14877 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
14878 && sym
->ts
.u
.derived
->components
== NULL
14879 && !sym
->ts
.u
.derived
->attr
.zero_comp
)
14881 gfc_error ("The derived type %qs at %L is of type %qs, "
14882 "which has not been defined", sym
->name
,
14883 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
14884 sym
->ts
.type
= BT_UNKNOWN
;
14888 /* Make sure that the derived type has been resolved and that the
14889 derived type is visible in the symbol's namespace, if it is a
14890 module function and is not PRIVATE. */
14891 if (sym
->ts
.type
== BT_DERIVED
14892 && sym
->ts
.u
.derived
->attr
.use_assoc
14893 && sym
->ns
->proc_name
14894 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14895 && !resolve_fl_derived (sym
->ts
.u
.derived
))
14898 /* Unless the derived-type declaration is use associated, Fortran 95
14899 does not allow public entries of private derived types.
14900 See 4.4.1 (F95) and 4.5.1.1 (F2003); and related interpretation
14901 161 in 95-006r3. */
14902 if (sym
->ts
.type
== BT_DERIVED
14903 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14904 && !sym
->ts
.u
.derived
->attr
.use_assoc
14905 && gfc_check_symbol_access (sym
)
14906 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
14907 && !gfc_notify_std (GFC_STD_F2003
, "PUBLIC %s %qs at %L of PRIVATE "
14908 "derived type %qs",
14909 (sym
->attr
.flavor
== FL_PARAMETER
)
14910 ? "parameter" : "variable",
14911 sym
->name
, &sym
->declared_at
,
14912 sym
->ts
.u
.derived
->name
))
14915 /* F2008, C1302. */
14916 if (sym
->ts
.type
== BT_DERIVED
14917 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
14918 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
14919 || sym
->ts
.u
.derived
->attr
.lock_comp
)
14920 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
14922 gfc_error ("Variable %s at %L of type LOCK_TYPE or with subcomponent of "
14923 "type LOCK_TYPE must be a coarray", sym
->name
,
14924 &sym
->declared_at
);
14928 /* TS18508, C702/C703. */
14929 if (sym
->ts
.type
== BT_DERIVED
14930 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
14931 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
14932 || sym
->ts
.u
.derived
->attr
.event_comp
)
14933 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
14935 gfc_error ("Variable %s at %L of type EVENT_TYPE or with subcomponent of "
14936 "type EVENT_TYPE must be a coarray", sym
->name
,
14937 &sym
->declared_at
);
14941 /* An assumed-size array with INTENT(OUT) shall not be of a type for which
14942 default initialization is defined (5.1.2.4.4). */
14943 if (sym
->ts
.type
== BT_DERIVED
14945 && sym
->attr
.intent
== INTENT_OUT
14947 && sym
->as
->type
== AS_ASSUMED_SIZE
)
14949 for (c
= sym
->ts
.u
.derived
->components
; c
; c
= c
->next
)
14951 if (c
->initializer
)
14953 gfc_error ("The INTENT(OUT) dummy argument %qs at %L is "
14954 "ASSUMED SIZE and so cannot have a default initializer",
14955 sym
->name
, &sym
->declared_at
);
14962 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
14963 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.lock_comp
)
14965 gfc_error ("Dummy argument %qs at %L of LOCK_TYPE shall not be "
14966 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
14971 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
14972 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.event_comp
)
14974 gfc_error ("Dummy argument %qs at %L of EVENT_TYPE shall not be "
14975 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
14980 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
14981 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
14982 && CLASS_DATA (sym
)->attr
.coarray_comp
))
14983 || class_attr
.codimension
)
14984 && (sym
->attr
.result
|| sym
->result
== sym
))
14986 gfc_error ("Function result %qs at %L shall not be a coarray or have "
14987 "a coarray component", sym
->name
, &sym
->declared_at
);
14992 if (sym
->attr
.codimension
&& sym
->ts
.type
== BT_DERIVED
14993 && sym
->ts
.u
.derived
->ts
.is_iso_c
)
14995 gfc_error ("Variable %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
14996 "shall not be a coarray", sym
->name
, &sym
->declared_at
);
15001 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15002 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15003 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15004 && (class_attr
.codimension
|| class_attr
.pointer
|| class_attr
.dimension
15005 || class_attr
.allocatable
))
15007 gfc_error ("Variable %qs at %L with coarray component shall be a "
15008 "nonpointer, nonallocatable scalar, which is not a coarray",
15009 sym
->name
, &sym
->declared_at
);
15013 /* F2008, C526. The function-result case was handled above. */
15014 if (class_attr
.codimension
15015 && !(class_attr
.allocatable
|| sym
->attr
.dummy
|| sym
->attr
.save
15016 || sym
->attr
.select_type_temporary
15017 || sym
->attr
.associate_var
15018 || (sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15019 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15020 || sym
->ns
->proc_name
->attr
.is_main_program
15021 || sym
->attr
.function
|| sym
->attr
.result
|| sym
->attr
.use_assoc
))
15023 gfc_error ("Variable %qs at %L is a coarray and is not ALLOCATABLE, SAVE "
15024 "nor a dummy argument", sym
->name
, &sym
->declared_at
);
15028 else if (class_attr
.codimension
&& !sym
->attr
.select_type_temporary
15029 && !class_attr
.allocatable
&& as
&& as
->cotype
== AS_DEFERRED
)
15031 gfc_error ("Coarray variable %qs at %L shall not have codimensions with "
15032 "deferred shape", sym
->name
, &sym
->declared_at
);
15035 else if (class_attr
.codimension
&& class_attr
.allocatable
&& as
15036 && (as
->cotype
!= AS_DEFERRED
|| as
->type
!= AS_DEFERRED
))
15038 gfc_error ("Allocatable coarray variable %qs at %L must have "
15039 "deferred shape", sym
->name
, &sym
->declared_at
);
15044 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15045 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15046 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15047 || (class_attr
.codimension
&& class_attr
.allocatable
))
15048 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
)
15050 gfc_error ("Variable %qs at %L is INTENT(OUT) and can thus not be an "
15051 "allocatable coarray or have coarray components",
15052 sym
->name
, &sym
->declared_at
);
15056 if (class_attr
.codimension
&& sym
->attr
.dummy
15057 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.is_bind_c
)
15059 gfc_error ("Coarray dummy variable %qs at %L not allowed in BIND(C) "
15060 "procedure %qs", sym
->name
, &sym
->declared_at
,
15061 sym
->ns
->proc_name
->name
);
15065 if (sym
->ts
.type
== BT_LOGICAL
15066 && ((sym
->attr
.function
&& sym
->attr
.is_bind_c
&& sym
->result
== sym
)
15067 || ((sym
->attr
.dummy
|| sym
->attr
.result
) && sym
->ns
->proc_name
15068 && sym
->ns
->proc_name
->attr
.is_bind_c
)))
15071 for (i
= 0; gfc_logical_kinds
[i
].kind
; i
++)
15072 if (gfc_logical_kinds
[i
].kind
== sym
->ts
.kind
)
15074 if (!gfc_logical_kinds
[i
].c_bool
&& sym
->attr
.dummy
15075 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL dummy argument %qs at "
15076 "%L with non-C_Bool kind in BIND(C) procedure "
15077 "%qs", sym
->name
, &sym
->declared_at
,
15078 sym
->ns
->proc_name
->name
))
15080 else if (!gfc_logical_kinds
[i
].c_bool
15081 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL result variable "
15082 "%qs at %L with non-C_Bool kind in "
15083 "BIND(C) procedure %qs", sym
->name
,
15085 sym
->attr
.function
? sym
->name
15086 : sym
->ns
->proc_name
->name
))
15090 switch (sym
->attr
.flavor
)
15093 if (!resolve_fl_variable (sym
, mp_flag
))
15098 if (sym
->formal
&& !sym
->formal_ns
)
15100 /* Check that none of the arguments are a namelist. */
15101 gfc_formal_arglist
*formal
= sym
->formal
;
15103 for (; formal
; formal
= formal
->next
)
15104 if (formal
->sym
&& formal
->sym
->attr
.flavor
== FL_NAMELIST
)
15106 gfc_error ("Namelist %qs can not be an argument to "
15107 "subroutine or function at %L",
15108 formal
->sym
->name
, &sym
->declared_at
);
15113 if (!resolve_fl_procedure (sym
, mp_flag
))
15118 if (!resolve_fl_namelist (sym
))
15123 if (!resolve_fl_parameter (sym
))
15131 /* Resolve array specifier. Check as well some constraints
15132 on COMMON blocks. */
15134 check_constant
= sym
->attr
.in_common
&& !sym
->attr
.pointer
;
15136 /* Set the formal_arg_flag so that check_conflict will not throw
15137 an error for host associated variables in the specification
15138 expression for an array_valued function. */
15139 if (sym
->attr
.function
&& sym
->as
)
15140 formal_arg_flag
= true;
15142 saved_specification_expr
= specification_expr
;
15143 specification_expr
= true;
15144 gfc_resolve_array_spec (sym
->as
, check_constant
);
15145 specification_expr
= saved_specification_expr
;
15147 formal_arg_flag
= false;
15149 /* Resolve formal namespaces. */
15150 if (sym
->formal_ns
&& sym
->formal_ns
!= gfc_current_ns
15151 && !sym
->attr
.contained
&& !sym
->attr
.intrinsic
)
15152 gfc_resolve (sym
->formal_ns
);
15154 /* Make sure the formal namespace is present. */
15155 if (sym
->formal
&& !sym
->formal_ns
)
15157 gfc_formal_arglist
*formal
= sym
->formal
;
15158 while (formal
&& !formal
->sym
)
15159 formal
= formal
->next
;
15163 sym
->formal_ns
= formal
->sym
->ns
;
15164 if (sym
->ns
!= formal
->sym
->ns
)
15165 sym
->formal_ns
->refs
++;
15169 /* Check threadprivate restrictions. */
15170 if (sym
->attr
.threadprivate
&& !sym
->attr
.save
15171 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15172 && (!sym
->attr
.in_common
15173 && sym
->module
== NULL
15174 && (sym
->ns
->proc_name
== NULL
15175 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15176 gfc_error ("Threadprivate at %L isn't SAVEd", &sym
->declared_at
);
15178 /* Check omp declare target restrictions. */
15179 if (sym
->attr
.omp_declare_target
15180 && sym
->attr
.flavor
== FL_VARIABLE
15182 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15183 && (!sym
->attr
.in_common
15184 && sym
->module
== NULL
15185 && (sym
->ns
->proc_name
== NULL
15186 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15187 gfc_error ("!$OMP DECLARE TARGET variable %qs at %L isn't SAVEd",
15188 sym
->name
, &sym
->declared_at
);
15190 /* If we have come this far we can apply default-initializers, as
15191 described in 14.7.5, to those variables that have not already
15192 been assigned one. */
15193 if (sym
->ts
.type
== BT_DERIVED
15195 && !sym
->attr
.allocatable
15196 && !sym
->attr
.alloc_comp
)
15198 symbol_attribute
*a
= &sym
->attr
;
15200 if ((!a
->save
&& !a
->dummy
&& !a
->pointer
15201 && !a
->in_common
&& !a
->use_assoc
15203 && !((a
->function
|| a
->result
)
15205 || sym
->ts
.u
.derived
->attr
.alloc_comp
15206 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15207 && !(a
->function
&& sym
!= sym
->result
))
15208 || (a
->dummy
&& a
->intent
== INTENT_OUT
&& !a
->pointer
))
15209 apply_default_init (sym
);
15210 else if (a
->function
&& sym
->result
&& a
->access
!= ACCESS_PRIVATE
15211 && (sym
->ts
.u
.derived
->attr
.alloc_comp
15212 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15213 /* Mark the result symbol to be referenced, when it has allocatable
15215 sym
->result
->attr
.referenced
= 1;
15218 if (sym
->ts
.type
== BT_CLASS
&& sym
->ns
== gfc_current_ns
15219 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
15220 && !CLASS_DATA (sym
)->attr
.class_pointer
15221 && !CLASS_DATA (sym
)->attr
.allocatable
)
15222 apply_default_init (sym
);
15224 /* If this symbol has a type-spec, check it. */
15225 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
15226 || (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
))
15227 if (!resolve_typespec_used (&sym
->ts
, &sym
->declared_at
, sym
->name
))
15230 if (sym
->param_list
)
15235 /************* Resolve DATA statements *************/
15239 gfc_data_value
*vnode
;
15245 /* Advance the values structure to point to the next value in the data list. */
15248 next_data_value (void)
15250 while (mpz_cmp_ui (values
.left
, 0) == 0)
15253 if (values
.vnode
->next
== NULL
)
15256 values
.vnode
= values
.vnode
->next
;
15257 mpz_set (values
.left
, values
.vnode
->repeat
);
15265 check_data_variable (gfc_data_variable
*var
, locus
*where
)
15271 ar_type mark
= AR_UNKNOWN
;
15273 mpz_t section_index
[GFC_MAX_DIMENSIONS
];
15279 if (!gfc_resolve_expr (var
->expr
))
15283 mpz_init_set_si (offset
, 0);
15286 if (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
15287 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
15288 e
= e
->value
.function
.actual
->expr
;
15290 if (e
->expr_type
!= EXPR_VARIABLE
)
15291 gfc_internal_error ("check_data_variable(): Bad expression");
15293 sym
= e
->symtree
->n
.sym
;
15295 if (sym
->ns
->is_block_data
&& !sym
->attr
.in_common
)
15297 gfc_error ("BLOCK DATA element %qs at %L must be in COMMON",
15298 sym
->name
, &sym
->declared_at
);
15301 if (e
->ref
== NULL
&& sym
->as
)
15303 gfc_error ("DATA array %qs at %L must be specified in a previous"
15304 " declaration", sym
->name
, where
);
15308 has_pointer
= sym
->attr
.pointer
;
15310 if (gfc_is_coindexed (e
))
15312 gfc_error ("DATA element %qs at %L cannot have a coindex", sym
->name
,
15317 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15319 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.pointer
)
15323 && ref
->type
== REF_ARRAY
15324 && ref
->u
.ar
.type
!= AR_FULL
)
15326 gfc_error ("DATA element %qs at %L is a pointer and so must "
15327 "be a full array", sym
->name
, where
);
15332 if (e
->rank
== 0 || has_pointer
)
15334 mpz_init_set_ui (size
, 1);
15341 /* Find the array section reference. */
15342 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15344 if (ref
->type
!= REF_ARRAY
)
15346 if (ref
->u
.ar
.type
== AR_ELEMENT
)
15352 /* Set marks according to the reference pattern. */
15353 switch (ref
->u
.ar
.type
)
15361 /* Get the start position of array section. */
15362 gfc_get_section_index (ar
, section_index
, &offset
);
15367 gcc_unreachable ();
15370 if (!gfc_array_size (e
, &size
))
15372 gfc_error ("Nonconstant array section at %L in DATA statement",
15374 mpz_clear (offset
);
15381 while (mpz_cmp_ui (size
, 0) > 0)
15383 if (!next_data_value ())
15385 gfc_error ("DATA statement at %L has more variables than values",
15391 t
= gfc_check_assign (var
->expr
, values
.vnode
->expr
, 0);
15395 /* If we have more than one element left in the repeat count,
15396 and we have more than one element left in the target variable,
15397 then create a range assignment. */
15398 /* FIXME: Only done for full arrays for now, since array sections
15400 if (mark
== AR_FULL
&& ref
&& ref
->next
== NULL
15401 && mpz_cmp_ui (values
.left
, 1) > 0 && mpz_cmp_ui (size
, 1) > 0)
15405 if (mpz_cmp (size
, values
.left
) >= 0)
15407 mpz_init_set (range
, values
.left
);
15408 mpz_sub (size
, size
, values
.left
);
15409 mpz_set_ui (values
.left
, 0);
15413 mpz_init_set (range
, size
);
15414 mpz_sub (values
.left
, values
.left
, size
);
15415 mpz_set_ui (size
, 0);
15418 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15421 mpz_add (offset
, offset
, range
);
15428 /* Assign initial value to symbol. */
15431 mpz_sub_ui (values
.left
, values
.left
, 1);
15432 mpz_sub_ui (size
, size
, 1);
15434 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15439 if (mark
== AR_FULL
)
15440 mpz_add_ui (offset
, offset
, 1);
15442 /* Modify the array section indexes and recalculate the offset
15443 for next element. */
15444 else if (mark
== AR_SECTION
)
15445 gfc_advance_section (section_index
, ar
, &offset
);
15449 if (mark
== AR_SECTION
)
15451 for (i
= 0; i
< ar
->dimen
; i
++)
15452 mpz_clear (section_index
[i
]);
15456 mpz_clear (offset
);
15462 static bool traverse_data_var (gfc_data_variable
*, locus
*);
15464 /* Iterate over a list of elements in a DATA statement. */
15467 traverse_data_list (gfc_data_variable
*var
, locus
*where
)
15470 iterator_stack frame
;
15471 gfc_expr
*e
, *start
, *end
, *step
;
15472 bool retval
= true;
15474 mpz_init (frame
.value
);
15477 start
= gfc_copy_expr (var
->iter
.start
);
15478 end
= gfc_copy_expr (var
->iter
.end
);
15479 step
= gfc_copy_expr (var
->iter
.step
);
15481 if (!gfc_simplify_expr (start
, 1)
15482 || start
->expr_type
!= EXPR_CONSTANT
)
15484 gfc_error ("start of implied-do loop at %L could not be "
15485 "simplified to a constant value", &start
->where
);
15489 if (!gfc_simplify_expr (end
, 1)
15490 || end
->expr_type
!= EXPR_CONSTANT
)
15492 gfc_error ("end of implied-do loop at %L could not be "
15493 "simplified to a constant value", &start
->where
);
15497 if (!gfc_simplify_expr (step
, 1)
15498 || step
->expr_type
!= EXPR_CONSTANT
)
15500 gfc_error ("step of implied-do loop at %L could not be "
15501 "simplified to a constant value", &start
->where
);
15506 mpz_set (trip
, end
->value
.integer
);
15507 mpz_sub (trip
, trip
, start
->value
.integer
);
15508 mpz_add (trip
, trip
, step
->value
.integer
);
15510 mpz_div (trip
, trip
, step
->value
.integer
);
15512 mpz_set (frame
.value
, start
->value
.integer
);
15514 frame
.prev
= iter_stack
;
15515 frame
.variable
= var
->iter
.var
->symtree
;
15516 iter_stack
= &frame
;
15518 while (mpz_cmp_ui (trip
, 0) > 0)
15520 if (!traverse_data_var (var
->list
, where
))
15526 e
= gfc_copy_expr (var
->expr
);
15527 if (!gfc_simplify_expr (e
, 1))
15534 mpz_add (frame
.value
, frame
.value
, step
->value
.integer
);
15536 mpz_sub_ui (trip
, trip
, 1);
15540 mpz_clear (frame
.value
);
15543 gfc_free_expr (start
);
15544 gfc_free_expr (end
);
15545 gfc_free_expr (step
);
15547 iter_stack
= frame
.prev
;
15552 /* Type resolve variables in the variable list of a DATA statement. */
15555 traverse_data_var (gfc_data_variable
*var
, locus
*where
)
15559 for (; var
; var
= var
->next
)
15561 if (var
->expr
== NULL
)
15562 t
= traverse_data_list (var
, where
);
15564 t
= check_data_variable (var
, where
);
15574 /* Resolve the expressions and iterators associated with a data statement.
15575 This is separate from the assignment checking because data lists should
15576 only be resolved once. */
15579 resolve_data_variables (gfc_data_variable
*d
)
15581 for (; d
; d
= d
->next
)
15583 if (d
->list
== NULL
)
15585 if (!gfc_resolve_expr (d
->expr
))
15590 if (!gfc_resolve_iterator (&d
->iter
, false, true))
15593 if (!resolve_data_variables (d
->list
))
15602 /* Resolve a single DATA statement. We implement this by storing a pointer to
15603 the value list into static variables, and then recursively traversing the
15604 variables list, expanding iterators and such. */
15607 resolve_data (gfc_data
*d
)
15610 if (!resolve_data_variables (d
->var
))
15613 values
.vnode
= d
->value
;
15614 if (d
->value
== NULL
)
15615 mpz_set_ui (values
.left
, 0);
15617 mpz_set (values
.left
, d
->value
->repeat
);
15619 if (!traverse_data_var (d
->var
, &d
->where
))
15622 /* At this point, we better not have any values left. */
15624 if (next_data_value ())
15625 gfc_error ("DATA statement at %L has more values than variables",
15630 /* 12.6 Constraint: In a pure subprogram any variable which is in common or
15631 accessed by host or use association, is a dummy argument to a pure function,
15632 is a dummy argument with INTENT (IN) to a pure subroutine, or an object that
15633 is storage associated with any such variable, shall not be used in the
15634 following contexts: (clients of this function). */
15636 /* Determines if a variable is not 'pure', i.e., not assignable within a pure
15637 procedure. Returns zero if assignment is OK, nonzero if there is a
15640 gfc_impure_variable (gfc_symbol
*sym
)
15645 if (sym
->attr
.use_assoc
|| sym
->attr
.in_common
)
15648 /* Check if the symbol's ns is inside the pure procedure. */
15649 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15653 if (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.function
)
15657 proc
= sym
->ns
->proc_name
;
15658 if (sym
->attr
.dummy
15659 && ((proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_IN
)
15660 || proc
->attr
.function
))
15663 /* TODO: Sort out what can be storage associated, if anything, and include
15664 it here. In principle equivalences should be scanned but it does not
15665 seem to be possible to storage associate an impure variable this way. */
15670 /* Test whether a symbol is pure or not. For a NULL pointer, checks if the
15671 current namespace is inside a pure procedure. */
15674 gfc_pure (gfc_symbol
*sym
)
15676 symbol_attribute attr
;
15681 /* Check if the current namespace or one of its parents
15682 belongs to a pure procedure. */
15683 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15685 sym
= ns
->proc_name
;
15689 if (attr
.flavor
== FL_PROCEDURE
&& attr
.pure
)
15697 return attr
.flavor
== FL_PROCEDURE
&& attr
.pure
;
15701 /* Test whether a symbol is implicitly pure or not. For a NULL pointer,
15702 checks if the current namespace is implicitly pure. Note that this
15703 function returns false for a PURE procedure. */
15706 gfc_implicit_pure (gfc_symbol
*sym
)
15712 /* Check if the current procedure is implicit_pure. Walk up
15713 the procedure list until we find a procedure. */
15714 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15716 sym
= ns
->proc_name
;
15720 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15725 return sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.implicit_pure
15726 && !sym
->attr
.pure
;
15731 gfc_unset_implicit_pure (gfc_symbol
*sym
)
15737 /* Check if the current procedure is implicit_pure. Walk up
15738 the procedure list until we find a procedure. */
15739 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15741 sym
= ns
->proc_name
;
15745 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15750 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15751 sym
->attr
.implicit_pure
= 0;
15753 sym
->attr
.pure
= 0;
15757 /* Test whether the current procedure is elemental or not. */
15760 gfc_elemental (gfc_symbol
*sym
)
15762 symbol_attribute attr
;
15765 sym
= gfc_current_ns
->proc_name
;
15770 return attr
.flavor
== FL_PROCEDURE
&& attr
.elemental
;
15774 /* Warn about unused labels. */
15777 warn_unused_fortran_label (gfc_st_label
*label
)
15782 warn_unused_fortran_label (label
->left
);
15784 if (label
->defined
== ST_LABEL_UNKNOWN
)
15787 switch (label
->referenced
)
15789 case ST_LABEL_UNKNOWN
:
15790 gfc_warning (OPT_Wunused_label
, "Label %d at %L defined but not used",
15791 label
->value
, &label
->where
);
15794 case ST_LABEL_BAD_TARGET
:
15795 gfc_warning (OPT_Wunused_label
,
15796 "Label %d at %L defined but cannot be used",
15797 label
->value
, &label
->where
);
15804 warn_unused_fortran_label (label
->right
);
15808 /* Returns the sequence type of a symbol or sequence. */
15811 sequence_type (gfc_typespec ts
)
15820 if (ts
.u
.derived
->components
== NULL
)
15821 return SEQ_NONDEFAULT
;
15823 result
= sequence_type (ts
.u
.derived
->components
->ts
);
15824 for (c
= ts
.u
.derived
->components
->next
; c
; c
= c
->next
)
15825 if (sequence_type (c
->ts
) != result
)
15831 if (ts
.kind
!= gfc_default_character_kind
)
15832 return SEQ_NONDEFAULT
;
15834 return SEQ_CHARACTER
;
15837 if (ts
.kind
!= gfc_default_integer_kind
)
15838 return SEQ_NONDEFAULT
;
15840 return SEQ_NUMERIC
;
15843 if (!(ts
.kind
== gfc_default_real_kind
15844 || ts
.kind
== gfc_default_double_kind
))
15845 return SEQ_NONDEFAULT
;
15847 return SEQ_NUMERIC
;
15850 if (ts
.kind
!= gfc_default_complex_kind
)
15851 return SEQ_NONDEFAULT
;
15853 return SEQ_NUMERIC
;
15856 if (ts
.kind
!= gfc_default_logical_kind
)
15857 return SEQ_NONDEFAULT
;
15859 return SEQ_NUMERIC
;
15862 return SEQ_NONDEFAULT
;
15867 /* Resolve derived type EQUIVALENCE object. */
15870 resolve_equivalence_derived (gfc_symbol
*derived
, gfc_symbol
*sym
, gfc_expr
*e
)
15872 gfc_component
*c
= derived
->components
;
15877 /* Shall not be an object of nonsequence derived type. */
15878 if (!derived
->attr
.sequence
)
15880 gfc_error ("Derived type variable %qs at %L must have SEQUENCE "
15881 "attribute to be an EQUIVALENCE object", sym
->name
,
15886 /* Shall not have allocatable components. */
15887 if (derived
->attr
.alloc_comp
)
15889 gfc_error ("Derived type variable %qs at %L cannot have ALLOCATABLE "
15890 "components to be an EQUIVALENCE object",sym
->name
,
15895 if (sym
->attr
.in_common
&& gfc_has_default_initializer (sym
->ts
.u
.derived
))
15897 gfc_error ("Derived type variable %qs at %L with default "
15898 "initialization cannot be in EQUIVALENCE with a variable "
15899 "in COMMON", sym
->name
, &e
->where
);
15903 for (; c
; c
= c
->next
)
15905 if (gfc_bt_struct (c
->ts
.type
)
15906 && (!resolve_equivalence_derived(c
->ts
.u
.derived
, sym
, e
)))
15909 /* Shall not be an object of sequence derived type containing a pointer
15910 in the structure. */
15911 if (c
->attr
.pointer
)
15913 gfc_error ("Derived type variable %qs at %L with pointer "
15914 "component(s) cannot be an EQUIVALENCE object",
15915 sym
->name
, &e
->where
);
15923 /* Resolve equivalence object.
15924 An EQUIVALENCE object shall not be a dummy argument, a pointer, a target,
15925 an allocatable array, an object of nonsequence derived type, an object of
15926 sequence derived type containing a pointer at any level of component
15927 selection, an automatic object, a function name, an entry name, a result
15928 name, a named constant, a structure component, or a subobject of any of
15929 the preceding objects. A substring shall not have length zero. A
15930 derived type shall not have components with default initialization nor
15931 shall two objects of an equivalence group be initialized.
15932 Either all or none of the objects shall have an protected attribute.
15933 The simple constraints are done in symbol.c(check_conflict) and the rest
15934 are implemented here. */
15937 resolve_equivalence (gfc_equiv
*eq
)
15940 gfc_symbol
*first_sym
;
15943 locus
*last_where
= NULL
;
15944 seq_type eq_type
, last_eq_type
;
15945 gfc_typespec
*last_ts
;
15946 int object
, cnt_protected
;
15949 last_ts
= &eq
->expr
->symtree
->n
.sym
->ts
;
15951 first_sym
= eq
->expr
->symtree
->n
.sym
;
15955 for (object
= 1; eq
; eq
= eq
->eq
, object
++)
15959 e
->ts
= e
->symtree
->n
.sym
->ts
;
15960 /* match_varspec might not know yet if it is seeing
15961 array reference or substring reference, as it doesn't
15963 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
)
15965 gfc_ref
*ref
= e
->ref
;
15966 sym
= e
->symtree
->n
.sym
;
15968 if (sym
->attr
.dimension
)
15970 ref
->u
.ar
.as
= sym
->as
;
15974 /* For substrings, convert REF_ARRAY into REF_SUBSTRING. */
15975 if (e
->ts
.type
== BT_CHARACTER
15977 && ref
->type
== REF_ARRAY
15978 && ref
->u
.ar
.dimen
== 1
15979 && ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
15980 && ref
->u
.ar
.stride
[0] == NULL
)
15982 gfc_expr
*start
= ref
->u
.ar
.start
[0];
15983 gfc_expr
*end
= ref
->u
.ar
.end
[0];
15986 /* Optimize away the (:) reference. */
15987 if (start
== NULL
&& end
== NULL
)
15990 e
->ref
= ref
->next
;
15992 e
->ref
->next
= ref
->next
;
15997 ref
->type
= REF_SUBSTRING
;
15999 start
= gfc_get_int_expr (gfc_charlen_int_kind
,
16001 ref
->u
.ss
.start
= start
;
16002 if (end
== NULL
&& e
->ts
.u
.cl
)
16003 end
= gfc_copy_expr (e
->ts
.u
.cl
->length
);
16004 ref
->u
.ss
.end
= end
;
16005 ref
->u
.ss
.length
= e
->ts
.u
.cl
;
16012 /* Any further ref is an error. */
16015 gcc_assert (ref
->type
== REF_ARRAY
);
16016 gfc_error ("Syntax error in EQUIVALENCE statement at %L",
16022 if (!gfc_resolve_expr (e
))
16025 sym
= e
->symtree
->n
.sym
;
16027 if (sym
->attr
.is_protected
)
16029 if (cnt_protected
> 0 && cnt_protected
!= object
)
16031 gfc_error ("Either all or none of the objects in the "
16032 "EQUIVALENCE set at %L shall have the "
16033 "PROTECTED attribute",
16038 /* Shall not equivalence common block variables in a PURE procedure. */
16039 if (sym
->ns
->proc_name
16040 && sym
->ns
->proc_name
->attr
.pure
16041 && sym
->attr
.in_common
)
16043 /* Need to check for symbols that may have entered the pure
16044 procedure via a USE statement. */
16045 bool saw_sym
= false;
16046 if (sym
->ns
->use_stmts
)
16049 for (r
= sym
->ns
->use_stmts
->rename
; r
; r
= r
->next
)
16050 if (strcmp(r
->use_name
, sym
->name
) == 0) saw_sym
= true;
16056 gfc_error ("COMMON block member %qs at %L cannot be an "
16057 "EQUIVALENCE object in the pure procedure %qs",
16058 sym
->name
, &e
->where
, sym
->ns
->proc_name
->name
);
16062 /* Shall not be a named constant. */
16063 if (e
->expr_type
== EXPR_CONSTANT
)
16065 gfc_error ("Named constant %qs at %L cannot be an EQUIVALENCE "
16066 "object", sym
->name
, &e
->where
);
16070 if (e
->ts
.type
== BT_DERIVED
16071 && !resolve_equivalence_derived (e
->ts
.u
.derived
, sym
, e
))
16074 /* Check that the types correspond correctly:
16076 A numeric sequence structure may be equivalenced to another sequence
16077 structure, an object of default integer type, default real type, double
16078 precision real type, default logical type such that components of the
16079 structure ultimately only become associated to objects of the same
16080 kind. A character sequence structure may be equivalenced to an object
16081 of default character kind or another character sequence structure.
16082 Other objects may be equivalenced only to objects of the same type and
16083 kind parameters. */
16085 /* Identical types are unconditionally OK. */
16086 if (object
== 1 || gfc_compare_types (last_ts
, &sym
->ts
))
16087 goto identical_types
;
16089 last_eq_type
= sequence_type (*last_ts
);
16090 eq_type
= sequence_type (sym
->ts
);
16092 /* Since the pair of objects is not of the same type, mixed or
16093 non-default sequences can be rejected. */
16095 msg
= "Sequence %s with mixed components in EQUIVALENCE "
16096 "statement at %L with different type objects";
16098 && last_eq_type
== SEQ_MIXED
16099 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16100 || (eq_type
== SEQ_MIXED
16101 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16104 msg
= "Non-default type object or sequence %s in EQUIVALENCE "
16105 "statement at %L with objects of different type";
16107 && last_eq_type
== SEQ_NONDEFAULT
16108 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16109 || (eq_type
== SEQ_NONDEFAULT
16110 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16113 msg
="Non-CHARACTER object %qs in default CHARACTER "
16114 "EQUIVALENCE statement at %L";
16115 if (last_eq_type
== SEQ_CHARACTER
16116 && eq_type
!= SEQ_CHARACTER
16117 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16120 msg
="Non-NUMERIC object %qs in default NUMERIC "
16121 "EQUIVALENCE statement at %L";
16122 if (last_eq_type
== SEQ_NUMERIC
16123 && eq_type
!= SEQ_NUMERIC
16124 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16129 last_where
= &e
->where
;
16134 /* Shall not be an automatic array. */
16135 if (e
->ref
->type
== REF_ARRAY
16136 && !gfc_resolve_array_spec (e
->ref
->u
.ar
.as
, 1))
16138 gfc_error ("Array %qs at %L with non-constant bounds cannot be "
16139 "an EQUIVALENCE object", sym
->name
, &e
->where
);
16146 /* Shall not be a structure component. */
16147 if (r
->type
== REF_COMPONENT
)
16149 gfc_error ("Structure component %qs at %L cannot be an "
16150 "EQUIVALENCE object",
16151 r
->u
.c
.component
->name
, &e
->where
);
16155 /* A substring shall not have length zero. */
16156 if (r
->type
== REF_SUBSTRING
)
16158 if (compare_bound (r
->u
.ss
.start
, r
->u
.ss
.end
) == CMP_GT
)
16160 gfc_error ("Substring at %L has length zero",
16161 &r
->u
.ss
.start
->where
);
16171 /* Function called by resolve_fntype to flag other symbol used in the
16172 length type parameter specification of function resuls. */
16175 flag_fn_result_spec (gfc_expr
*expr
,
16176 gfc_symbol
*sym ATTRIBUTE_UNUSED
,
16177 int *f ATTRIBUTE_UNUSED
)
16182 if (expr
->expr_type
== EXPR_VARIABLE
)
16184 s
= expr
->symtree
->n
.sym
;
16185 for (ns
= s
->ns
; ns
; ns
= ns
->parent
)
16189 if (!s
->fn_result_spec
16190 && s
->attr
.flavor
== FL_PARAMETER
)
16192 /* Function contained in a module.... */
16193 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_MODULE
)
16196 s
->fn_result_spec
= 1;
16197 /* Make sure that this symbol is translated as a module
16199 st
= gfc_get_unique_symtree (ns
);
16203 /* ... which is use associated and called. */
16204 else if (s
->attr
.use_assoc
|| s
->attr
.used_in_submodule
16206 /* External function matched with an interface. */
16209 && s
->ns
->proc_name
->attr
.if_source
== IFSRC_DECL
)
16210 || s
->ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16211 && s
->ns
->proc_name
->attr
.function
))
16212 s
->fn_result_spec
= 1;
16219 /* Resolve function and ENTRY types, issue diagnostics if needed. */
16222 resolve_fntype (gfc_namespace
*ns
)
16224 gfc_entry_list
*el
;
16227 if (ns
->proc_name
== NULL
|| !ns
->proc_name
->attr
.function
)
16230 /* If there are any entries, ns->proc_name is the entry master
16231 synthetic symbol and ns->entries->sym actual FUNCTION symbol. */
16233 sym
= ns
->entries
->sym
;
16235 sym
= ns
->proc_name
;
16236 if (sym
->result
== sym
16237 && sym
->ts
.type
== BT_UNKNOWN
16238 && !gfc_set_default_type (sym
, 0, NULL
)
16239 && !sym
->attr
.untyped
)
16241 gfc_error ("Function %qs at %L has no IMPLICIT type",
16242 sym
->name
, &sym
->declared_at
);
16243 sym
->attr
.untyped
= 1;
16246 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->ts
.u
.derived
->attr
.use_assoc
16247 && !sym
->attr
.contained
16248 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
16249 && gfc_check_symbol_access (sym
))
16251 gfc_notify_std (GFC_STD_F2003
, "PUBLIC function %qs at "
16252 "%L of PRIVATE type %qs", sym
->name
,
16253 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
16257 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
16259 if (el
->sym
->result
== el
->sym
16260 && el
->sym
->ts
.type
== BT_UNKNOWN
16261 && !gfc_set_default_type (el
->sym
, 0, NULL
)
16262 && !el
->sym
->attr
.untyped
)
16264 gfc_error ("ENTRY %qs at %L has no IMPLICIT type",
16265 el
->sym
->name
, &el
->sym
->declared_at
);
16266 el
->sym
->attr
.untyped
= 1;
16270 if (sym
->ts
.type
== BT_CHARACTER
)
16271 gfc_traverse_expr (sym
->ts
.u
.cl
->length
, NULL
, flag_fn_result_spec
, 0);
16275 /* 12.3.2.1.1 Defined operators. */
16278 check_uop_procedure (gfc_symbol
*sym
, locus where
)
16280 gfc_formal_arglist
*formal
;
16282 if (!sym
->attr
.function
)
16284 gfc_error ("User operator procedure %qs at %L must be a FUNCTION",
16285 sym
->name
, &where
);
16289 if (sym
->ts
.type
== BT_CHARACTER
16290 && !((sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
) || sym
->ts
.deferred
)
16291 && !(sym
->result
&& ((sym
->result
->ts
.u
.cl
16292 && sym
->result
->ts
.u
.cl
->length
) || sym
->result
->ts
.deferred
)))
16294 gfc_error ("User operator procedure %qs at %L cannot be assumed "
16295 "character length", sym
->name
, &where
);
16299 formal
= gfc_sym_get_dummy_args (sym
);
16300 if (!formal
|| !formal
->sym
)
16302 gfc_error ("User operator procedure %qs at %L must have at least "
16303 "one argument", sym
->name
, &where
);
16307 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16309 gfc_error ("First argument of operator interface at %L must be "
16310 "INTENT(IN)", &where
);
16314 if (formal
->sym
->attr
.optional
)
16316 gfc_error ("First argument of operator interface at %L cannot be "
16317 "optional", &where
);
16321 formal
= formal
->next
;
16322 if (!formal
|| !formal
->sym
)
16325 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16327 gfc_error ("Second argument of operator interface at %L must be "
16328 "INTENT(IN)", &where
);
16332 if (formal
->sym
->attr
.optional
)
16334 gfc_error ("Second argument of operator interface at %L cannot be "
16335 "optional", &where
);
16341 gfc_error ("Operator interface at %L must have, at most, two "
16342 "arguments", &where
);
16350 gfc_resolve_uops (gfc_symtree
*symtree
)
16352 gfc_interface
*itr
;
16354 if (symtree
== NULL
)
16357 gfc_resolve_uops (symtree
->left
);
16358 gfc_resolve_uops (symtree
->right
);
16360 for (itr
= symtree
->n
.uop
->op
; itr
; itr
= itr
->next
)
16361 check_uop_procedure (itr
->sym
, itr
->sym
->declared_at
);
16365 /* Examine all of the expressions associated with a program unit,
16366 assign types to all intermediate expressions, make sure that all
16367 assignments are to compatible types and figure out which names
16368 refer to which functions or subroutines. It doesn't check code
16369 block, which is handled by gfc_resolve_code. */
16372 resolve_types (gfc_namespace
*ns
)
16378 gfc_namespace
* old_ns
= gfc_current_ns
;
16380 if (ns
->types_resolved
)
16383 /* Check that all IMPLICIT types are ok. */
16384 if (!ns
->seen_implicit_none
)
16387 for (letter
= 0; letter
!= GFC_LETTERS
; ++letter
)
16388 if (ns
->set_flag
[letter
]
16389 && !resolve_typespec_used (&ns
->default_type
[letter
],
16390 &ns
->implicit_loc
[letter
], NULL
))
16394 gfc_current_ns
= ns
;
16396 resolve_entries (ns
);
16398 resolve_common_vars (&ns
->blank_common
, false);
16399 resolve_common_blocks (ns
->common_root
);
16401 resolve_contained_functions (ns
);
16403 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
16404 && ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16405 resolve_formal_arglist (ns
->proc_name
);
16407 gfc_traverse_ns (ns
, resolve_bind_c_derived_types
);
16409 for (cl
= ns
->cl_list
; cl
; cl
= cl
->next
)
16410 resolve_charlen (cl
);
16412 gfc_traverse_ns (ns
, resolve_symbol
);
16414 resolve_fntype (ns
);
16416 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16418 if (gfc_pure (ns
->proc_name
) && !gfc_pure (n
->proc_name
))
16419 gfc_error ("Contained procedure %qs at %L of a PURE procedure must "
16420 "also be PURE", n
->proc_name
->name
,
16421 &n
->proc_name
->declared_at
);
16427 gfc_do_concurrent_flag
= 0;
16428 gfc_check_interfaces (ns
);
16430 gfc_traverse_ns (ns
, resolve_values
);
16436 for (d
= ns
->data
; d
; d
= d
->next
)
16440 gfc_traverse_ns (ns
, gfc_formalize_init_value
);
16442 gfc_traverse_ns (ns
, gfc_verify_binding_labels
);
16444 for (eq
= ns
->equiv
; eq
; eq
= eq
->next
)
16445 resolve_equivalence (eq
);
16447 /* Warn about unused labels. */
16448 if (warn_unused_label
)
16449 warn_unused_fortran_label (ns
->st_labels
);
16451 gfc_resolve_uops (ns
->uop_root
);
16453 gfc_traverse_ns (ns
, gfc_verify_DTIO_procedures
);
16455 gfc_resolve_omp_declare_simd (ns
);
16457 gfc_resolve_omp_udrs (ns
->omp_udr_root
);
16459 ns
->types_resolved
= 1;
16461 gfc_current_ns
= old_ns
;
16465 /* Call gfc_resolve_code recursively. */
16468 resolve_codes (gfc_namespace
*ns
)
16471 bitmap_obstack old_obstack
;
16473 if (ns
->resolved
== 1)
16476 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16479 gfc_current_ns
= ns
;
16481 /* Don't clear 'cs_base' if this is the namespace of a BLOCK construct. */
16482 if (!(ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_LABEL
))
16485 /* Set to an out of range value. */
16486 current_entry_id
= -1;
16488 old_obstack
= labels_obstack
;
16489 bitmap_obstack_initialize (&labels_obstack
);
16491 gfc_resolve_oacc_declare (ns
);
16492 gfc_resolve_omp_local_vars (ns
);
16493 gfc_resolve_code (ns
->code
, ns
);
16495 bitmap_obstack_release (&labels_obstack
);
16496 labels_obstack
= old_obstack
;
16500 /* This function is called after a complete program unit has been compiled.
16501 Its purpose is to examine all of the expressions associated with a program
16502 unit, assign types to all intermediate expressions, make sure that all
16503 assignments are to compatible types and figure out which names refer to
16504 which functions or subroutines. */
16507 gfc_resolve (gfc_namespace
*ns
)
16509 gfc_namespace
*old_ns
;
16510 code_stack
*old_cs_base
;
16511 struct gfc_omp_saved_state old_omp_state
;
16517 old_ns
= gfc_current_ns
;
16518 old_cs_base
= cs_base
;
16520 /* As gfc_resolve can be called during resolution of an OpenMP construct
16521 body, we should clear any state associated to it, so that say NS's
16522 DO loops are not interpreted as OpenMP loops. */
16523 if (!ns
->construct_entities
)
16524 gfc_omp_save_and_clear_state (&old_omp_state
);
16526 resolve_types (ns
);
16527 component_assignment_level
= 0;
16528 resolve_codes (ns
);
16530 gfc_current_ns
= old_ns
;
16531 cs_base
= old_cs_base
;
16534 gfc_run_passes (ns
);
16536 if (!ns
->construct_entities
)
16537 gfc_omp_restore_state (&old_omp_state
);