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
&& CLASS_DATA (comp
)->as
)
1293 rank
= CLASS_DATA (comp
)->as
->rank
;
1295 if (cons
->expr
->expr_type
!= EXPR_NULL
&& rank
!= cons
->expr
->rank
1296 && (comp
->attr
.allocatable
|| cons
->expr
->rank
))
1298 gfc_error ("The rank of the element in the structure "
1299 "constructor at %L does not match that of the "
1300 "component (%d/%d)", &cons
->expr
->where
,
1301 cons
->expr
->rank
, rank
);
1305 /* If we don't have the right type, try to convert it. */
1307 if (!comp
->attr
.proc_pointer
&&
1308 !gfc_compare_types (&cons
->expr
->ts
, &comp
->ts
))
1310 if (strcmp (comp
->name
, "_extends") == 0)
1312 /* Can afford to be brutal with the _extends initializer.
1313 The derived type can get lost because it is PRIVATE
1314 but it is not usage constrained by the standard. */
1315 cons
->expr
->ts
= comp
->ts
;
1317 else if (comp
->attr
.pointer
&& cons
->expr
->ts
.type
!= BT_UNKNOWN
)
1319 gfc_error ("The element in the structure constructor at %L, "
1320 "for pointer component %qs, is %s but should be %s",
1321 &cons
->expr
->where
, comp
->name
,
1322 gfc_basic_typename (cons
->expr
->ts
.type
),
1323 gfc_basic_typename (comp
->ts
.type
));
1328 bool t2
= gfc_convert_type (cons
->expr
, &comp
->ts
, 1);
1334 /* For strings, the length of the constructor should be the same as
1335 the one of the structure, ensure this if the lengths are known at
1336 compile time and when we are dealing with PARAMETER or structure
1338 if (cons
->expr
->ts
.type
== BT_CHARACTER
&& comp
->ts
.u
.cl
1339 && comp
->ts
.u
.cl
->length
1340 && comp
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
1341 && cons
->expr
->ts
.u
.cl
&& cons
->expr
->ts
.u
.cl
->length
1342 && cons
->expr
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
1343 && cons
->expr
->rank
!= 0
1344 && mpz_cmp (cons
->expr
->ts
.u
.cl
->length
->value
.integer
,
1345 comp
->ts
.u
.cl
->length
->value
.integer
) != 0)
1347 if (cons
->expr
->expr_type
== EXPR_VARIABLE
1348 && cons
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
)
1350 /* Wrap the parameter in an array constructor (EXPR_ARRAY)
1351 to make use of the gfc_resolve_character_array_constructor
1352 machinery. The expression is later simplified away to
1353 an array of string literals. */
1354 gfc_expr
*para
= cons
->expr
;
1355 cons
->expr
= gfc_get_expr ();
1356 cons
->expr
->ts
= para
->ts
;
1357 cons
->expr
->where
= para
->where
;
1358 cons
->expr
->expr_type
= EXPR_ARRAY
;
1359 cons
->expr
->rank
= para
->rank
;
1360 cons
->expr
->shape
= gfc_copy_shape (para
->shape
, para
->rank
);
1361 gfc_constructor_append_expr (&cons
->expr
->value
.constructor
,
1362 para
, &cons
->expr
->where
);
1365 if (cons
->expr
->expr_type
== EXPR_ARRAY
)
1367 /* Rely on the cleanup of the namespace to deal correctly with
1368 the old charlen. (There was a block here that attempted to
1369 remove the charlen but broke the chain in so doing.) */
1370 cons
->expr
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1371 cons
->expr
->ts
.u
.cl
->length_from_typespec
= true;
1372 cons
->expr
->ts
.u
.cl
->length
= gfc_copy_expr (comp
->ts
.u
.cl
->length
);
1373 gfc_resolve_character_array_constructor (cons
->expr
);
1377 if (cons
->expr
->expr_type
== EXPR_NULL
1378 && !(comp
->attr
.pointer
|| comp
->attr
.allocatable
1379 || comp
->attr
.proc_pointer
|| comp
->ts
.f90_type
== BT_VOID
1380 || (comp
->ts
.type
== BT_CLASS
1381 && (CLASS_DATA (comp
)->attr
.class_pointer
1382 || CLASS_DATA (comp
)->attr
.allocatable
))))
1385 gfc_error ("The NULL in the structure constructor at %L is "
1386 "being applied to component %qs, which is neither "
1387 "a POINTER nor ALLOCATABLE", &cons
->expr
->where
,
1391 if (comp
->attr
.proc_pointer
&& comp
->ts
.interface
)
1393 /* Check procedure pointer interface. */
1394 gfc_symbol
*s2
= NULL
;
1399 c2
= gfc_get_proc_ptr_comp (cons
->expr
);
1402 s2
= c2
->ts
.interface
;
1405 else if (cons
->expr
->expr_type
== EXPR_FUNCTION
)
1407 s2
= cons
->expr
->symtree
->n
.sym
->result
;
1408 name
= cons
->expr
->symtree
->n
.sym
->result
->name
;
1410 else if (cons
->expr
->expr_type
!= EXPR_NULL
)
1412 s2
= cons
->expr
->symtree
->n
.sym
;
1413 name
= cons
->expr
->symtree
->n
.sym
->name
;
1416 if (s2
&& !gfc_compare_interfaces (comp
->ts
.interface
, s2
, name
, 0, 1,
1417 err
, sizeof (err
), NULL
, NULL
))
1419 gfc_error_opt (OPT_Wargument_mismatch
,
1420 "Interface mismatch for procedure-pointer "
1421 "component %qs in structure constructor at %L:"
1422 " %s", comp
->name
, &cons
->expr
->where
, err
);
1427 if (!comp
->attr
.pointer
|| comp
->attr
.proc_pointer
1428 || cons
->expr
->expr_type
== EXPR_NULL
)
1431 a
= gfc_expr_attr (cons
->expr
);
1433 if (!a
.pointer
&& !a
.target
)
1436 gfc_error ("The element in the structure constructor at %L, "
1437 "for pointer component %qs should be a POINTER or "
1438 "a TARGET", &cons
->expr
->where
, comp
->name
);
1443 /* F08:C461. Additional checks for pointer initialization. */
1447 gfc_error ("Pointer initialization target at %L "
1448 "must not be ALLOCATABLE", &cons
->expr
->where
);
1453 gfc_error ("Pointer initialization target at %L "
1454 "must have the SAVE attribute", &cons
->expr
->where
);
1458 /* F2003, C1272 (3). */
1459 bool impure
= cons
->expr
->expr_type
== EXPR_VARIABLE
1460 && (gfc_impure_variable (cons
->expr
->symtree
->n
.sym
)
1461 || gfc_is_coindexed (cons
->expr
));
1462 if (impure
&& gfc_pure (NULL
))
1465 gfc_error ("Invalid expression in the structure constructor for "
1466 "pointer component %qs at %L in PURE procedure",
1467 comp
->name
, &cons
->expr
->where
);
1471 gfc_unset_implicit_pure (NULL
);
1478 /****************** Expression name resolution ******************/
1480 /* Returns 0 if a symbol was not declared with a type or
1481 attribute declaration statement, nonzero otherwise. */
1484 was_declared (gfc_symbol
*sym
)
1490 if (!a
.implicit_type
&& sym
->ts
.type
!= BT_UNKNOWN
)
1493 if (a
.allocatable
|| a
.dimension
|| a
.dummy
|| a
.external
|| a
.intrinsic
1494 || a
.optional
|| a
.pointer
|| a
.save
|| a
.target
|| a
.volatile_
1495 || a
.value
|| a
.access
!= ACCESS_UNKNOWN
|| a
.intent
!= INTENT_UNKNOWN
1496 || a
.asynchronous
|| a
.codimension
)
1503 /* Determine if a symbol is generic or not. */
1506 generic_sym (gfc_symbol
*sym
)
1510 if (sym
->attr
.generic
||
1511 (sym
->attr
.intrinsic
&& gfc_generic_intrinsic (sym
->name
)))
1514 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1517 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1524 return generic_sym (s
);
1531 /* Determine if a symbol is specific or not. */
1534 specific_sym (gfc_symbol
*sym
)
1538 if (sym
->attr
.if_source
== IFSRC_IFBODY
1539 || sym
->attr
.proc
== PROC_MODULE
1540 || sym
->attr
.proc
== PROC_INTERNAL
1541 || sym
->attr
.proc
== PROC_ST_FUNCTION
1542 || (sym
->attr
.intrinsic
&& gfc_specific_intrinsic (sym
->name
))
1543 || sym
->attr
.external
)
1546 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1549 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1551 return (s
== NULL
) ? 0 : specific_sym (s
);
1555 /* Figure out if the procedure is specific, generic or unknown. */
1558 { PTYPE_GENERIC
= 1, PTYPE_SPECIFIC
, PTYPE_UNKNOWN
};
1561 procedure_kind (gfc_symbol
*sym
)
1563 if (generic_sym (sym
))
1564 return PTYPE_GENERIC
;
1566 if (specific_sym (sym
))
1567 return PTYPE_SPECIFIC
;
1569 return PTYPE_UNKNOWN
;
1572 /* Check references to assumed size arrays. The flag need_full_assumed_size
1573 is nonzero when matching actual arguments. */
1575 static int need_full_assumed_size
= 0;
1578 check_assumed_size_reference (gfc_symbol
*sym
, gfc_expr
*e
)
1580 if (need_full_assumed_size
|| !(sym
->as
&& sym
->as
->type
== AS_ASSUMED_SIZE
))
1583 /* FIXME: The comparison "e->ref->u.ar.type == AR_FULL" is wrong.
1584 What should it be? */
1585 if (e
->ref
&& (e
->ref
->u
.ar
.end
[e
->ref
->u
.ar
.as
->rank
- 1] == NULL
)
1586 && (e
->ref
->u
.ar
.as
->type
== AS_ASSUMED_SIZE
)
1587 && (e
->ref
->u
.ar
.type
== AR_FULL
))
1589 gfc_error ("The upper bound in the last dimension must "
1590 "appear in the reference to the assumed size "
1591 "array %qs at %L", sym
->name
, &e
->where
);
1598 /* Look for bad assumed size array references in argument expressions
1599 of elemental and array valued intrinsic procedures. Since this is
1600 called from procedure resolution functions, it only recurses at
1604 resolve_assumed_size_actual (gfc_expr
*e
)
1609 switch (e
->expr_type
)
1612 if (e
->symtree
&& check_assumed_size_reference (e
->symtree
->n
.sym
, e
))
1617 if (resolve_assumed_size_actual (e
->value
.op
.op1
)
1618 || resolve_assumed_size_actual (e
->value
.op
.op2
))
1629 /* Check a generic procedure, passed as an actual argument, to see if
1630 there is a matching specific name. If none, it is an error, and if
1631 more than one, the reference is ambiguous. */
1633 count_specific_procs (gfc_expr
*e
)
1640 sym
= e
->symtree
->n
.sym
;
1642 for (p
= sym
->generic
; p
; p
= p
->next
)
1643 if (strcmp (sym
->name
, p
->sym
->name
) == 0)
1645 e
->symtree
= gfc_find_symtree (p
->sym
->ns
->sym_root
,
1651 gfc_error ("%qs at %L is ambiguous", e
->symtree
->n
.sym
->name
,
1655 gfc_error ("GENERIC procedure %qs is not allowed as an actual "
1656 "argument at %L", sym
->name
, &e
->where
);
1662 /* See if a call to sym could possibly be a not allowed RECURSION because of
1663 a missing RECURSIVE declaration. This means that either sym is the current
1664 context itself, or sym is the parent of a contained procedure calling its
1665 non-RECURSIVE containing procedure.
1666 This also works if sym is an ENTRY. */
1669 is_illegal_recursion (gfc_symbol
* sym
, gfc_namespace
* context
)
1671 gfc_symbol
* proc_sym
;
1672 gfc_symbol
* context_proc
;
1673 gfc_namespace
* real_context
;
1675 if (sym
->attr
.flavor
== FL_PROGRAM
1676 || gfc_fl_struct (sym
->attr
.flavor
))
1679 gcc_assert (sym
->attr
.flavor
== FL_PROCEDURE
);
1681 /* If we've got an ENTRY, find real procedure. */
1682 if (sym
->attr
.entry
&& sym
->ns
->entries
)
1683 proc_sym
= sym
->ns
->entries
->sym
;
1687 /* If sym is RECURSIVE, all is well of course. */
1688 if (proc_sym
->attr
.recursive
|| flag_recursive
)
1691 /* Find the context procedure's "real" symbol if it has entries.
1692 We look for a procedure symbol, so recurse on the parents if we don't
1693 find one (like in case of a BLOCK construct). */
1694 for (real_context
= context
; ; real_context
= real_context
->parent
)
1696 /* We should find something, eventually! */
1697 gcc_assert (real_context
);
1699 context_proc
= (real_context
->entries
? real_context
->entries
->sym
1700 : real_context
->proc_name
);
1702 /* In some special cases, there may not be a proc_name, like for this
1704 real(bad_kind()) function foo () ...
1705 when checking the call to bad_kind ().
1706 In these cases, we simply return here and assume that the
1711 if (context_proc
->attr
.flavor
!= FL_LABEL
)
1715 /* A call from sym's body to itself is recursion, of course. */
1716 if (context_proc
== proc_sym
)
1719 /* The same is true if context is a contained procedure and sym the
1721 if (context_proc
->attr
.contained
)
1723 gfc_symbol
* parent_proc
;
1725 gcc_assert (context
->parent
);
1726 parent_proc
= (context
->parent
->entries
? context
->parent
->entries
->sym
1727 : context
->parent
->proc_name
);
1729 if (parent_proc
== proc_sym
)
1737 /* Resolve an intrinsic procedure: Set its function/subroutine attribute,
1738 its typespec and formal argument list. */
1741 gfc_resolve_intrinsic (gfc_symbol
*sym
, locus
*loc
)
1743 gfc_intrinsic_sym
* isym
= NULL
;
1749 /* Already resolved. */
1750 if (sym
->from_intmod
&& sym
->ts
.type
!= BT_UNKNOWN
)
1753 /* We already know this one is an intrinsic, so we don't call
1754 gfc_is_intrinsic for full checking but rather use gfc_find_function and
1755 gfc_find_subroutine directly to check whether it is a function or
1758 if (sym
->intmod_sym_id
&& sym
->attr
.subroutine
)
1760 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1761 isym
= gfc_intrinsic_subroutine_by_id (id
);
1763 else if (sym
->intmod_sym_id
)
1765 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1766 isym
= gfc_intrinsic_function_by_id (id
);
1768 else if (!sym
->attr
.subroutine
)
1769 isym
= gfc_find_function (sym
->name
);
1771 if (isym
&& !sym
->attr
.subroutine
)
1773 if (sym
->ts
.type
!= BT_UNKNOWN
&& warn_surprising
1774 && !sym
->attr
.implicit_type
)
1775 gfc_warning (OPT_Wsurprising
,
1776 "Type specified for intrinsic function %qs at %L is"
1777 " ignored", sym
->name
, &sym
->declared_at
);
1779 if (!sym
->attr
.function
&&
1780 !gfc_add_function(&sym
->attr
, sym
->name
, loc
))
1785 else if (isym
|| (isym
= gfc_find_subroutine (sym
->name
)))
1787 if (sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.implicit_type
)
1789 gfc_error ("Intrinsic subroutine %qs at %L shall not have a type"
1790 " specifier", sym
->name
, &sym
->declared_at
);
1794 if (!sym
->attr
.subroutine
&&
1795 !gfc_add_subroutine(&sym
->attr
, sym
->name
, loc
))
1800 gfc_error ("%qs declared INTRINSIC at %L does not exist", sym
->name
,
1805 gfc_copy_formal_args_intr (sym
, isym
, NULL
);
1807 sym
->attr
.pure
= isym
->pure
;
1808 sym
->attr
.elemental
= isym
->elemental
;
1810 /* Check it is actually available in the standard settings. */
1811 if (!gfc_check_intrinsic_standard (isym
, &symstd
, false, sym
->declared_at
))
1813 gfc_error ("The intrinsic %qs declared INTRINSIC at %L is not "
1814 "available in the current standard settings but %s. Use "
1815 "an appropriate %<-std=*%> option or enable "
1816 "%<-fall-intrinsics%> in order to use it.",
1817 sym
->name
, &sym
->declared_at
, symstd
);
1825 /* Resolve a procedure expression, like passing it to a called procedure or as
1826 RHS for a procedure pointer assignment. */
1829 resolve_procedure_expression (gfc_expr
* expr
)
1833 if (expr
->expr_type
!= EXPR_VARIABLE
)
1835 gcc_assert (expr
->symtree
);
1837 sym
= expr
->symtree
->n
.sym
;
1839 if (sym
->attr
.intrinsic
)
1840 gfc_resolve_intrinsic (sym
, &expr
->where
);
1842 if (sym
->attr
.flavor
!= FL_PROCEDURE
1843 || (sym
->attr
.function
&& sym
->result
== sym
))
1846 /* A non-RECURSIVE procedure that is used as procedure expression within its
1847 own body is in danger of being called recursively. */
1848 if (is_illegal_recursion (sym
, gfc_current_ns
))
1849 gfc_warning (0, "Non-RECURSIVE procedure %qs at %L is possibly calling"
1850 " itself recursively. Declare it RECURSIVE or use"
1851 " %<-frecursive%>", sym
->name
, &expr
->where
);
1857 /* Resolve an actual argument list. Most of the time, this is just
1858 resolving the expressions in the list.
1859 The exception is that we sometimes have to decide whether arguments
1860 that look like procedure arguments are really simple variable
1864 resolve_actual_arglist (gfc_actual_arglist
*arg
, procedure_type ptype
,
1865 bool no_formal_args
)
1868 gfc_symtree
*parent_st
;
1870 gfc_component
*comp
;
1871 int save_need_full_assumed_size
;
1872 bool return_value
= false;
1873 bool actual_arg_sav
= actual_arg
, first_actual_arg_sav
= first_actual_arg
;
1876 first_actual_arg
= true;
1878 for (; arg
; arg
= arg
->next
)
1883 /* Check the label is a valid branching target. */
1886 if (arg
->label
->defined
== ST_LABEL_UNKNOWN
)
1888 gfc_error ("Label %d referenced at %L is never defined",
1889 arg
->label
->value
, &arg
->label
->where
);
1893 first_actual_arg
= false;
1897 if (e
->expr_type
== EXPR_VARIABLE
1898 && e
->symtree
->n
.sym
->attr
.generic
1900 && count_specific_procs (e
) != 1)
1903 if (e
->ts
.type
!= BT_PROCEDURE
)
1905 save_need_full_assumed_size
= need_full_assumed_size
;
1906 if (e
->expr_type
!= EXPR_VARIABLE
)
1907 need_full_assumed_size
= 0;
1908 if (!gfc_resolve_expr (e
))
1910 need_full_assumed_size
= save_need_full_assumed_size
;
1914 /* See if the expression node should really be a variable reference. */
1916 sym
= e
->symtree
->n
.sym
;
1918 if (sym
->attr
.flavor
== FL_PROCEDURE
1919 || sym
->attr
.intrinsic
1920 || sym
->attr
.external
)
1924 /* If a procedure is not already determined to be something else
1925 check if it is intrinsic. */
1926 if (gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, e
->where
))
1927 sym
->attr
.intrinsic
= 1;
1929 if (sym
->attr
.proc
== PROC_ST_FUNCTION
)
1931 gfc_error ("Statement function %qs at %L is not allowed as an "
1932 "actual argument", sym
->name
, &e
->where
);
1935 actual_ok
= gfc_intrinsic_actual_ok (sym
->name
,
1936 sym
->attr
.subroutine
);
1937 if (sym
->attr
.intrinsic
&& actual_ok
== 0)
1939 gfc_error ("Intrinsic %qs at %L is not allowed as an "
1940 "actual argument", sym
->name
, &e
->where
);
1943 if (sym
->attr
.contained
&& !sym
->attr
.use_assoc
1944 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
1946 if (!gfc_notify_std (GFC_STD_F2008
, "Internal procedure %qs is"
1947 " used as actual argument at %L",
1948 sym
->name
, &e
->where
))
1952 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
)
1954 gfc_error ("ELEMENTAL non-INTRINSIC procedure %qs is not "
1955 "allowed as an actual argument at %L", sym
->name
,
1959 /* Check if a generic interface has a specific procedure
1960 with the same name before emitting an error. */
1961 if (sym
->attr
.generic
&& count_specific_procs (e
) != 1)
1964 /* Just in case a specific was found for the expression. */
1965 sym
= e
->symtree
->n
.sym
;
1967 /* If the symbol is the function that names the current (or
1968 parent) scope, then we really have a variable reference. */
1970 if (gfc_is_function_return_value (sym
, sym
->ns
))
1973 /* If all else fails, see if we have a specific intrinsic. */
1974 if (sym
->ts
.type
== BT_UNKNOWN
&& sym
->attr
.intrinsic
)
1976 gfc_intrinsic_sym
*isym
;
1978 isym
= gfc_find_function (sym
->name
);
1979 if (isym
== NULL
|| !isym
->specific
)
1981 gfc_error ("Unable to find a specific INTRINSIC procedure "
1982 "for the reference %qs at %L", sym
->name
,
1987 sym
->attr
.intrinsic
= 1;
1988 sym
->attr
.function
= 1;
1991 if (!gfc_resolve_expr (e
))
1996 /* See if the name is a module procedure in a parent unit. */
1998 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
2001 if (gfc_find_sym_tree (sym
->name
, sym
->ns
->parent
, 1, &parent_st
))
2003 gfc_error ("Symbol %qs at %L is ambiguous", sym
->name
, &e
->where
);
2007 if (parent_st
== NULL
)
2010 sym
= parent_st
->n
.sym
;
2011 e
->symtree
= parent_st
; /* Point to the right thing. */
2013 if (sym
->attr
.flavor
== FL_PROCEDURE
2014 || sym
->attr
.intrinsic
2015 || sym
->attr
.external
)
2017 if (!gfc_resolve_expr (e
))
2023 e
->expr_type
= EXPR_VARIABLE
;
2025 if ((sym
->as
!= NULL
&& sym
->ts
.type
!= BT_CLASS
)
2026 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
2027 && CLASS_DATA (sym
)->as
))
2029 e
->rank
= sym
->ts
.type
== BT_CLASS
2030 ? CLASS_DATA (sym
)->as
->rank
: sym
->as
->rank
;
2031 e
->ref
= gfc_get_ref ();
2032 e
->ref
->type
= REF_ARRAY
;
2033 e
->ref
->u
.ar
.type
= AR_FULL
;
2034 e
->ref
->u
.ar
.as
= sym
->ts
.type
== BT_CLASS
2035 ? CLASS_DATA (sym
)->as
: sym
->as
;
2038 /* Expressions are assigned a default ts.type of BT_PROCEDURE in
2039 primary.c (match_actual_arg). If above code determines that it
2040 is a variable instead, it needs to be resolved as it was not
2041 done at the beginning of this function. */
2042 save_need_full_assumed_size
= need_full_assumed_size
;
2043 if (e
->expr_type
!= EXPR_VARIABLE
)
2044 need_full_assumed_size
= 0;
2045 if (!gfc_resolve_expr (e
))
2047 need_full_assumed_size
= save_need_full_assumed_size
;
2050 /* Check argument list functions %VAL, %LOC and %REF. There is
2051 nothing to do for %REF. */
2052 if (arg
->name
&& arg
->name
[0] == '%')
2054 if (strncmp ("%VAL", arg
->name
, 4) == 0)
2056 if (e
->ts
.type
== BT_CHARACTER
|| e
->ts
.type
== BT_DERIVED
)
2058 gfc_error ("By-value argument at %L is not of numeric "
2065 gfc_error ("By-value argument at %L cannot be an array or "
2066 "an array section", &e
->where
);
2070 /* Intrinsics are still PROC_UNKNOWN here. However,
2071 since same file external procedures are not resolvable
2072 in gfortran, it is a good deal easier to leave them to
2074 if (ptype
!= PROC_UNKNOWN
2075 && ptype
!= PROC_DUMMY
2076 && ptype
!= PROC_EXTERNAL
2077 && ptype
!= PROC_MODULE
)
2079 gfc_error ("By-value argument at %L is not allowed "
2080 "in this context", &e
->where
);
2085 /* Statement functions have already been excluded above. */
2086 else if (strncmp ("%LOC", arg
->name
, 4) == 0
2087 && e
->ts
.type
== BT_PROCEDURE
)
2089 if (e
->symtree
->n
.sym
->attr
.proc
== PROC_INTERNAL
)
2091 gfc_error ("Passing internal procedure at %L by location "
2092 "not allowed", &e
->where
);
2098 comp
= gfc_get_proc_ptr_comp(e
);
2099 if (e
->expr_type
== EXPR_VARIABLE
2100 && comp
&& comp
->attr
.elemental
)
2102 gfc_error ("ELEMENTAL procedure pointer component %qs is not "
2103 "allowed as an actual argument at %L", comp
->name
,
2107 /* Fortran 2008, C1237. */
2108 if (e
->expr_type
== EXPR_VARIABLE
&& gfc_is_coindexed (e
)
2109 && gfc_has_ultimate_pointer (e
))
2111 gfc_error ("Coindexed actual argument at %L with ultimate pointer "
2112 "component", &e
->where
);
2116 first_actual_arg
= false;
2119 return_value
= true;
2122 actual_arg
= actual_arg_sav
;
2123 first_actual_arg
= first_actual_arg_sav
;
2125 return return_value
;
2129 /* Do the checks of the actual argument list that are specific to elemental
2130 procedures. If called with c == NULL, we have a function, otherwise if
2131 expr == NULL, we have a subroutine. */
2134 resolve_elemental_actual (gfc_expr
*expr
, gfc_code
*c
)
2136 gfc_actual_arglist
*arg0
;
2137 gfc_actual_arglist
*arg
;
2138 gfc_symbol
*esym
= NULL
;
2139 gfc_intrinsic_sym
*isym
= NULL
;
2141 gfc_intrinsic_arg
*iformal
= NULL
;
2142 gfc_formal_arglist
*eformal
= NULL
;
2143 bool formal_optional
= false;
2144 bool set_by_optional
= false;
2148 /* Is this an elemental procedure? */
2149 if (expr
&& expr
->value
.function
.actual
!= NULL
)
2151 if (expr
->value
.function
.esym
!= NULL
2152 && expr
->value
.function
.esym
->attr
.elemental
)
2154 arg0
= expr
->value
.function
.actual
;
2155 esym
= expr
->value
.function
.esym
;
2157 else if (expr
->value
.function
.isym
!= NULL
2158 && expr
->value
.function
.isym
->elemental
)
2160 arg0
= expr
->value
.function
.actual
;
2161 isym
= expr
->value
.function
.isym
;
2166 else if (c
&& c
->ext
.actual
!= NULL
)
2168 arg0
= c
->ext
.actual
;
2170 if (c
->resolved_sym
)
2171 esym
= c
->resolved_sym
;
2173 esym
= c
->symtree
->n
.sym
;
2176 if (!esym
->attr
.elemental
)
2182 /* The rank of an elemental is the rank of its array argument(s). */
2183 for (arg
= arg0
; arg
; arg
= arg
->next
)
2185 if (arg
->expr
!= NULL
&& arg
->expr
->rank
!= 0)
2187 rank
= arg
->expr
->rank
;
2188 if (arg
->expr
->expr_type
== EXPR_VARIABLE
2189 && arg
->expr
->symtree
->n
.sym
->attr
.optional
)
2190 set_by_optional
= true;
2192 /* Function specific; set the result rank and shape. */
2196 if (!expr
->shape
&& arg
->expr
->shape
)
2198 expr
->shape
= gfc_get_shape (rank
);
2199 for (i
= 0; i
< rank
; i
++)
2200 mpz_init_set (expr
->shape
[i
], arg
->expr
->shape
[i
]);
2207 /* If it is an array, it shall not be supplied as an actual argument
2208 to an elemental procedure unless an array of the same rank is supplied
2209 as an actual argument corresponding to a nonoptional dummy argument of
2210 that elemental procedure(12.4.1.5). */
2211 formal_optional
= false;
2213 iformal
= isym
->formal
;
2215 eformal
= esym
->formal
;
2217 for (arg
= arg0
; arg
; arg
= arg
->next
)
2221 if (eformal
->sym
&& eformal
->sym
->attr
.optional
)
2222 formal_optional
= true;
2223 eformal
= eformal
->next
;
2225 else if (isym
&& iformal
)
2227 if (iformal
->optional
)
2228 formal_optional
= true;
2229 iformal
= iformal
->next
;
2232 formal_optional
= true;
2234 if (pedantic
&& arg
->expr
!= NULL
2235 && arg
->expr
->expr_type
== EXPR_VARIABLE
2236 && arg
->expr
->symtree
->n
.sym
->attr
.optional
2239 && (set_by_optional
|| arg
->expr
->rank
!= rank
)
2240 && !(isym
&& isym
->id
== GFC_ISYM_CONVERSION
))
2242 gfc_warning (OPT_Wpedantic
,
2243 "%qs at %L is an array and OPTIONAL; IF IT IS "
2244 "MISSING, it cannot be the actual argument of an "
2245 "ELEMENTAL procedure unless there is a non-optional "
2246 "argument with the same rank (12.4.1.5)",
2247 arg
->expr
->symtree
->n
.sym
->name
, &arg
->expr
->where
);
2251 for (arg
= arg0
; arg
; arg
= arg
->next
)
2253 if (arg
->expr
== NULL
|| arg
->expr
->rank
== 0)
2256 /* Being elemental, the last upper bound of an assumed size array
2257 argument must be present. */
2258 if (resolve_assumed_size_actual (arg
->expr
))
2261 /* Elemental procedure's array actual arguments must conform. */
2264 if (!gfc_check_conformance (arg
->expr
, e
, "elemental procedure"))
2271 /* INTENT(OUT) is only allowed for subroutines; if any actual argument
2272 is an array, the intent inout/out variable needs to be also an array. */
2273 if (rank
> 0 && esym
&& expr
== NULL
)
2274 for (eformal
= esym
->formal
, arg
= arg0
; arg
&& eformal
;
2275 arg
= arg
->next
, eformal
= eformal
->next
)
2276 if ((eformal
->sym
->attr
.intent
== INTENT_OUT
2277 || eformal
->sym
->attr
.intent
== INTENT_INOUT
)
2278 && arg
->expr
&& arg
->expr
->rank
== 0)
2280 gfc_error ("Actual argument at %L for INTENT(%s) dummy %qs of "
2281 "ELEMENTAL subroutine %qs is a scalar, but another "
2282 "actual argument is an array", &arg
->expr
->where
,
2283 (eformal
->sym
->attr
.intent
== INTENT_OUT
) ? "OUT"
2284 : "INOUT", eformal
->sym
->name
, esym
->name
);
2291 /* This function does the checking of references to global procedures
2292 as defined in sections 18.1 and 14.1, respectively, of the Fortran
2293 77 and 95 standards. It checks for a gsymbol for the name, making
2294 one if it does not already exist. If it already exists, then the
2295 reference being resolved must correspond to the type of gsymbol.
2296 Otherwise, the new symbol is equipped with the attributes of the
2297 reference. The corresponding code that is called in creating
2298 global entities is parse.c.
2300 In addition, for all but -std=legacy, the gsymbols are used to
2301 check the interfaces of external procedures from the same file.
2302 The namespace of the gsymbol is resolved and then, once this is
2303 done the interface is checked. */
2307 not_in_recursive (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2309 if (!gsym_ns
->proc_name
->attr
.recursive
)
2312 if (sym
->ns
== gsym_ns
)
2315 if (sym
->ns
->parent
&& sym
->ns
->parent
== gsym_ns
)
2322 not_entry_self_reference (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2324 if (gsym_ns
->entries
)
2326 gfc_entry_list
*entry
= gsym_ns
->entries
;
2328 for (; entry
; entry
= entry
->next
)
2330 if (strcmp (sym
->name
, entry
->sym
->name
) == 0)
2332 if (strcmp (gsym_ns
->proc_name
->name
,
2333 sym
->ns
->proc_name
->name
) == 0)
2337 && strcmp (gsym_ns
->proc_name
->name
,
2338 sym
->ns
->parent
->proc_name
->name
) == 0)
2347 /* Check for the requirement of an explicit interface. F08:12.4.2.2. */
2350 gfc_explicit_interface_required (gfc_symbol
*sym
, char *errmsg
, int err_len
)
2352 gfc_formal_arglist
*arg
= gfc_sym_get_dummy_args (sym
);
2354 for ( ; arg
; arg
= arg
->next
)
2359 if (arg
->sym
->attr
.allocatable
) /* (2a) */
2361 strncpy (errmsg
, _("allocatable argument"), err_len
);
2364 else if (arg
->sym
->attr
.asynchronous
)
2366 strncpy (errmsg
, _("asynchronous argument"), err_len
);
2369 else if (arg
->sym
->attr
.optional
)
2371 strncpy (errmsg
, _("optional argument"), err_len
);
2374 else if (arg
->sym
->attr
.pointer
)
2376 strncpy (errmsg
, _("pointer argument"), err_len
);
2379 else if (arg
->sym
->attr
.target
)
2381 strncpy (errmsg
, _("target argument"), err_len
);
2384 else if (arg
->sym
->attr
.value
)
2386 strncpy (errmsg
, _("value argument"), err_len
);
2389 else if (arg
->sym
->attr
.volatile_
)
2391 strncpy (errmsg
, _("volatile argument"), err_len
);
2394 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_SHAPE
) /* (2b) */
2396 strncpy (errmsg
, _("assumed-shape argument"), err_len
);
2399 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_RANK
) /* TS 29113, 6.2. */
2401 strncpy (errmsg
, _("assumed-rank argument"), err_len
);
2404 else if (arg
->sym
->attr
.codimension
) /* (2c) */
2406 strncpy (errmsg
, _("coarray argument"), err_len
);
2409 else if (false) /* (2d) TODO: parametrized derived type */
2411 strncpy (errmsg
, _("parametrized derived type argument"), err_len
);
2414 else if (arg
->sym
->ts
.type
== BT_CLASS
) /* (2e) */
2416 strncpy (errmsg
, _("polymorphic argument"), err_len
);
2419 else if (arg
->sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
2421 strncpy (errmsg
, _("NO_ARG_CHECK attribute"), err_len
);
2424 else if (arg
->sym
->ts
.type
== BT_ASSUMED
)
2426 /* As assumed-type is unlimited polymorphic (cf. above).
2427 See also TS 29113, Note 6.1. */
2428 strncpy (errmsg
, _("assumed-type argument"), err_len
);
2433 if (sym
->attr
.function
)
2435 gfc_symbol
*res
= sym
->result
? sym
->result
: sym
;
2437 if (res
->attr
.dimension
) /* (3a) */
2439 strncpy (errmsg
, _("array result"), err_len
);
2442 else if (res
->attr
.pointer
|| res
->attr
.allocatable
) /* (3b) */
2444 strncpy (errmsg
, _("pointer or allocatable result"), err_len
);
2447 else if (res
->ts
.type
== BT_CHARACTER
&& res
->ts
.u
.cl
2448 && res
->ts
.u
.cl
->length
2449 && res
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
) /* (3c) */
2451 strncpy (errmsg
, _("result with non-constant character length"), err_len
);
2456 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
) /* (4) */
2458 strncpy (errmsg
, _("elemental procedure"), err_len
);
2461 else if (sym
->attr
.is_bind_c
) /* (5) */
2463 strncpy (errmsg
, _("bind(c) procedure"), err_len
);
2472 resolve_global_procedure (gfc_symbol
*sym
, locus
*where
,
2473 gfc_actual_arglist
**actual
, int sub
)
2477 enum gfc_symbol_type type
;
2480 type
= sub
? GSYM_SUBROUTINE
: GSYM_FUNCTION
;
2482 gsym
= gfc_get_gsymbol (sym
->binding_label
? sym
->binding_label
: sym
->name
);
2484 if ((gsym
->type
!= GSYM_UNKNOWN
&& gsym
->type
!= type
))
2485 gfc_global_used (gsym
, where
);
2487 if ((sym
->attr
.if_source
== IFSRC_UNKNOWN
2488 || sym
->attr
.if_source
== IFSRC_IFBODY
)
2489 && gsym
->type
!= GSYM_UNKNOWN
2490 && !gsym
->binding_label
2492 && gsym
->ns
->resolved
!= -1
2493 && gsym
->ns
->proc_name
2494 && not_in_recursive (sym
, gsym
->ns
)
2495 && not_entry_self_reference (sym
, gsym
->ns
))
2497 gfc_symbol
*def_sym
;
2499 /* Resolve the gsymbol namespace if needed. */
2500 if (!gsym
->ns
->resolved
)
2502 gfc_dt_list
*old_dt_list
;
2504 /* Stash away derived types so that the backend_decls do not
2506 old_dt_list
= gfc_derived_types
;
2507 gfc_derived_types
= NULL
;
2509 gfc_resolve (gsym
->ns
);
2511 /* Store the new derived types with the global namespace. */
2512 if (gfc_derived_types
)
2513 gsym
->ns
->derived_types
= gfc_derived_types
;
2515 /* Restore the derived types of this namespace. */
2516 gfc_derived_types
= old_dt_list
;
2519 /* Make sure that translation for the gsymbol occurs before
2520 the procedure currently being resolved. */
2521 ns
= gfc_global_ns_list
;
2522 for (; ns
&& ns
!= gsym
->ns
; ns
= ns
->sibling
)
2524 if (ns
->sibling
== gsym
->ns
)
2526 ns
->sibling
= gsym
->ns
->sibling
;
2527 gsym
->ns
->sibling
= gfc_global_ns_list
;
2528 gfc_global_ns_list
= gsym
->ns
;
2533 def_sym
= gsym
->ns
->proc_name
;
2535 /* This can happen if a binding name has been specified. */
2536 if (gsym
->binding_label
&& gsym
->sym_name
!= def_sym
->name
)
2537 gfc_find_symbol (gsym
->sym_name
, gsym
->ns
, 0, &def_sym
);
2539 if (def_sym
->attr
.entry_master
)
2541 gfc_entry_list
*entry
;
2542 for (entry
= gsym
->ns
->entries
; entry
; entry
= entry
->next
)
2543 if (strcmp (entry
->sym
->name
, sym
->name
) == 0)
2545 def_sym
= entry
->sym
;
2550 if (sym
->attr
.function
&& !gfc_compare_types (&sym
->ts
, &def_sym
->ts
))
2552 gfc_error ("Return type mismatch of function %qs at %L (%s/%s)",
2553 sym
->name
, &sym
->declared_at
, gfc_typename (&sym
->ts
),
2554 gfc_typename (&def_sym
->ts
));
2558 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
2559 && gfc_explicit_interface_required (def_sym
, reason
, sizeof(reason
)))
2561 gfc_error ("Explicit interface required for %qs at %L: %s",
2562 sym
->name
, &sym
->declared_at
, reason
);
2566 if (!pedantic
&& (gfc_option
.allow_std
& GFC_STD_GNU
))
2567 /* Turn erros into warnings with -std=gnu and -std=legacy. */
2568 gfc_errors_to_warnings (true);
2570 if (!gfc_compare_interfaces (sym
, def_sym
, sym
->name
, 0, 1,
2571 reason
, sizeof(reason
), NULL
, NULL
))
2573 gfc_error_opt (OPT_Wargument_mismatch
,
2574 "Interface mismatch in global procedure %qs at %L:"
2575 " %s", sym
->name
, &sym
->declared_at
, reason
);
2580 || ((gfc_option
.warn_std
& GFC_STD_LEGACY
)
2581 && !(gfc_option
.warn_std
& GFC_STD_GNU
)))
2582 gfc_errors_to_warnings (true);
2584 if (sym
->attr
.if_source
!= IFSRC_IFBODY
)
2585 gfc_procedure_use (def_sym
, actual
, where
);
2589 gfc_errors_to_warnings (false);
2591 if (gsym
->type
== GSYM_UNKNOWN
)
2594 gsym
->where
= *where
;
2601 /************* Function resolution *************/
2603 /* Resolve a function call known to be generic.
2604 Section 14.1.2.4.1. */
2607 resolve_generic_f0 (gfc_expr
*expr
, gfc_symbol
*sym
)
2611 if (sym
->attr
.generic
)
2613 s
= gfc_search_interface (sym
->generic
, 0, &expr
->value
.function
.actual
);
2616 expr
->value
.function
.name
= s
->name
;
2617 expr
->value
.function
.esym
= s
;
2619 if (s
->ts
.type
!= BT_UNKNOWN
)
2621 else if (s
->result
!= NULL
&& s
->result
->ts
.type
!= BT_UNKNOWN
)
2622 expr
->ts
= s
->result
->ts
;
2625 expr
->rank
= s
->as
->rank
;
2626 else if (s
->result
!= NULL
&& s
->result
->as
!= NULL
)
2627 expr
->rank
= s
->result
->as
->rank
;
2629 gfc_set_sym_referenced (expr
->value
.function
.esym
);
2634 /* TODO: Need to search for elemental references in generic
2638 if (sym
->attr
.intrinsic
)
2639 return gfc_intrinsic_func_interface (expr
, 0);
2646 resolve_generic_f (gfc_expr
*expr
)
2650 gfc_interface
*intr
= NULL
;
2652 sym
= expr
->symtree
->n
.sym
;
2656 m
= resolve_generic_f0 (expr
, sym
);
2659 else if (m
== MATCH_ERROR
)
2664 for (intr
= sym
->generic
; intr
; intr
= intr
->next
)
2665 if (gfc_fl_struct (intr
->sym
->attr
.flavor
))
2668 if (sym
->ns
->parent
== NULL
)
2670 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2674 if (!generic_sym (sym
))
2678 /* Last ditch attempt. See if the reference is to an intrinsic
2679 that possesses a matching interface. 14.1.2.4 */
2680 if (sym
&& !intr
&& !gfc_is_intrinsic (sym
, 0, expr
->where
))
2682 if (gfc_init_expr_flag
)
2683 gfc_error ("Function %qs in initialization expression at %L "
2684 "must be an intrinsic function",
2685 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2687 gfc_error ("There is no specific function for the generic %qs "
2688 "at %L", expr
->symtree
->n
.sym
->name
, &expr
->where
);
2694 if (!gfc_convert_to_structure_constructor (expr
, intr
->sym
, NULL
,
2697 if (!gfc_use_derived (expr
->ts
.u
.derived
))
2699 return resolve_structure_cons (expr
, 0);
2702 m
= gfc_intrinsic_func_interface (expr
, 0);
2707 gfc_error ("Generic function %qs at %L is not consistent with a "
2708 "specific intrinsic interface", expr
->symtree
->n
.sym
->name
,
2715 /* Resolve a function call known to be specific. */
2718 resolve_specific_f0 (gfc_symbol
*sym
, gfc_expr
*expr
)
2722 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
2724 if (sym
->attr
.dummy
)
2726 sym
->attr
.proc
= PROC_DUMMY
;
2730 sym
->attr
.proc
= PROC_EXTERNAL
;
2734 if (sym
->attr
.proc
== PROC_MODULE
2735 || sym
->attr
.proc
== PROC_ST_FUNCTION
2736 || sym
->attr
.proc
== PROC_INTERNAL
)
2739 if (sym
->attr
.intrinsic
)
2741 m
= gfc_intrinsic_func_interface (expr
, 1);
2745 gfc_error ("Function %qs at %L is INTRINSIC but is not compatible "
2746 "with an intrinsic", sym
->name
, &expr
->where
);
2754 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2757 expr
->ts
= sym
->result
->ts
;
2760 expr
->value
.function
.name
= sym
->name
;
2761 expr
->value
.function
.esym
= sym
;
2762 /* Prevent crash when sym->ts.u.derived->components is not set due to previous
2764 if (sym
->ts
.type
== BT_CLASS
&& !CLASS_DATA (sym
))
2766 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)
2767 expr
->rank
= CLASS_DATA (sym
)->as
->rank
;
2768 else if (sym
->as
!= NULL
)
2769 expr
->rank
= sym
->as
->rank
;
2776 resolve_specific_f (gfc_expr
*expr
)
2781 sym
= expr
->symtree
->n
.sym
;
2785 m
= resolve_specific_f0 (sym
, expr
);
2788 if (m
== MATCH_ERROR
)
2791 if (sym
->ns
->parent
== NULL
)
2794 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2800 gfc_error ("Unable to resolve the specific function %qs at %L",
2801 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2806 /* Recursively append candidate SYM to CANDIDATES. Store the number of
2807 candidates in CANDIDATES_LEN. */
2810 lookup_function_fuzzy_find_candidates (gfc_symtree
*sym
,
2812 size_t &candidates_len
)
2818 if ((sym
->n
.sym
->ts
.type
!= BT_UNKNOWN
|| sym
->n
.sym
->attr
.external
)
2819 && sym
->n
.sym
->attr
.flavor
== FL_PROCEDURE
)
2820 vec_push (candidates
, candidates_len
, sym
->name
);
2824 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2828 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2832 /* Lookup function FN fuzzily, taking names in SYMROOT into account. */
2835 gfc_lookup_function_fuzzy (const char *fn
, gfc_symtree
*symroot
)
2837 char **candidates
= NULL
;
2838 size_t candidates_len
= 0;
2839 lookup_function_fuzzy_find_candidates (symroot
, candidates
, candidates_len
);
2840 return gfc_closest_fuzzy_match (fn
, candidates
);
2844 /* Resolve a procedure call not known to be generic nor specific. */
2847 resolve_unknown_f (gfc_expr
*expr
)
2852 sym
= expr
->symtree
->n
.sym
;
2854 if (sym
->attr
.dummy
)
2856 sym
->attr
.proc
= PROC_DUMMY
;
2857 expr
->value
.function
.name
= sym
->name
;
2861 /* See if we have an intrinsic function reference. */
2863 if (gfc_is_intrinsic (sym
, 0, expr
->where
))
2865 if (gfc_intrinsic_func_interface (expr
, 1) == MATCH_YES
)
2870 /* The reference is to an external name. */
2872 sym
->attr
.proc
= PROC_EXTERNAL
;
2873 expr
->value
.function
.name
= sym
->name
;
2874 expr
->value
.function
.esym
= expr
->symtree
->n
.sym
;
2876 if (sym
->as
!= NULL
)
2877 expr
->rank
= sym
->as
->rank
;
2879 /* Type of the expression is either the type of the symbol or the
2880 default type of the symbol. */
2883 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2885 if (sym
->ts
.type
!= BT_UNKNOWN
)
2889 ts
= gfc_get_default_type (sym
->name
, sym
->ns
);
2891 if (ts
->type
== BT_UNKNOWN
)
2894 = gfc_lookup_function_fuzzy (sym
->name
, sym
->ns
->sym_root
);
2896 gfc_error ("Function %qs at %L has no IMPLICIT type"
2897 "; did you mean %qs?",
2898 sym
->name
, &expr
->where
, guessed
);
2900 gfc_error ("Function %qs at %L has no IMPLICIT type",
2901 sym
->name
, &expr
->where
);
2912 /* Return true, if the symbol is an external procedure. */
2914 is_external_proc (gfc_symbol
*sym
)
2916 if (!sym
->attr
.dummy
&& !sym
->attr
.contained
2917 && !gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, sym
->declared_at
)
2918 && sym
->attr
.proc
!= PROC_ST_FUNCTION
2919 && !sym
->attr
.proc_pointer
2920 && !sym
->attr
.use_assoc
2928 /* Figure out if a function reference is pure or not. Also set the name
2929 of the function for a potential error message. Return nonzero if the
2930 function is PURE, zero if not. */
2932 pure_stmt_function (gfc_expr
*, gfc_symbol
*);
2935 pure_function (gfc_expr
*e
, const char **name
)
2938 gfc_component
*comp
;
2942 if (e
->symtree
!= NULL
2943 && e
->symtree
->n
.sym
!= NULL
2944 && e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
2945 return pure_stmt_function (e
, e
->symtree
->n
.sym
);
2947 comp
= gfc_get_proc_ptr_comp (e
);
2950 pure
= gfc_pure (comp
->ts
.interface
);
2953 else if (e
->value
.function
.esym
)
2955 pure
= gfc_pure (e
->value
.function
.esym
);
2956 *name
= e
->value
.function
.esym
->name
;
2958 else if (e
->value
.function
.isym
)
2960 pure
= e
->value
.function
.isym
->pure
2961 || e
->value
.function
.isym
->elemental
;
2962 *name
= e
->value
.function
.isym
->name
;
2966 /* Implicit functions are not pure. */
2968 *name
= e
->value
.function
.name
;
2976 impure_stmt_fcn (gfc_expr
*e
, gfc_symbol
*sym
,
2977 int *f ATTRIBUTE_UNUSED
)
2981 /* Don't bother recursing into other statement functions
2982 since they will be checked individually for purity. */
2983 if (e
->expr_type
!= EXPR_FUNCTION
2985 || e
->symtree
->n
.sym
== sym
2986 || e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
2989 return pure_function (e
, &name
) ? false : true;
2994 pure_stmt_function (gfc_expr
*e
, gfc_symbol
*sym
)
2996 return gfc_traverse_expr (e
, sym
, impure_stmt_fcn
, 0) ? 0 : 1;
3000 /* Check if an impure function is allowed in the current context. */
3002 static bool check_pure_function (gfc_expr
*e
)
3004 const char *name
= NULL
;
3005 if (!pure_function (e
, &name
) && name
)
3009 gfc_error ("Reference to impure function %qs at %L inside a "
3010 "FORALL %s", name
, &e
->where
,
3011 forall_flag
== 2 ? "mask" : "block");
3014 else if (gfc_do_concurrent_flag
)
3016 gfc_error ("Reference to impure function %qs at %L inside a "
3017 "DO CONCURRENT %s", name
, &e
->where
,
3018 gfc_do_concurrent_flag
== 2 ? "mask" : "block");
3021 else if (gfc_pure (NULL
))
3023 gfc_error ("Reference to impure function %qs at %L "
3024 "within a PURE procedure", name
, &e
->where
);
3027 gfc_unset_implicit_pure (NULL
);
3033 /* Update current procedure's array_outer_dependency flag, considering
3034 a call to procedure SYM. */
3037 update_current_proc_array_outer_dependency (gfc_symbol
*sym
)
3039 /* Check to see if this is a sibling function that has not yet
3041 gfc_namespace
*sibling
= gfc_current_ns
->sibling
;
3042 for (; sibling
; sibling
= sibling
->sibling
)
3044 if (sibling
->proc_name
== sym
)
3046 gfc_resolve (sibling
);
3051 /* If SYM has references to outer arrays, so has the procedure calling
3052 SYM. If SYM is a procedure pointer, we can assume the worst. */
3053 if (sym
->attr
.array_outer_dependency
3054 || sym
->attr
.proc_pointer
)
3055 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3059 /* Resolve a function call, which means resolving the arguments, then figuring
3060 out which entity the name refers to. */
3063 resolve_function (gfc_expr
*expr
)
3065 gfc_actual_arglist
*arg
;
3069 procedure_type p
= PROC_INTRINSIC
;
3070 bool no_formal_args
;
3074 sym
= expr
->symtree
->n
.sym
;
3076 /* If this is a procedure pointer component, it has already been resolved. */
3077 if (gfc_is_proc_ptr_comp (expr
))
3080 /* Avoid re-resolving the arguments of caf_get, which can lead to inserting
3082 if (sym
&& sym
->attr
.intrinsic
3083 && (sym
->intmod_sym_id
== GFC_ISYM_CAF_GET
3084 || sym
->intmod_sym_id
== GFC_ISYM_CAF_SEND
))
3087 if (sym
&& sym
->attr
.intrinsic
3088 && !gfc_resolve_intrinsic (sym
, &expr
->where
))
3091 if (sym
&& (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.subroutine
))
3093 gfc_error ("%qs at %L is not a function", sym
->name
, &expr
->where
);
3097 /* If this ia a deferred TBP with an abstract interface (which may
3098 of course be referenced), expr->value.function.esym will be set. */
3099 if (sym
&& sym
->attr
.abstract
&& !expr
->value
.function
.esym
)
3101 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3102 sym
->name
, &expr
->where
);
3106 /* Switch off assumed size checking and do this again for certain kinds
3107 of procedure, once the procedure itself is resolved. */
3108 need_full_assumed_size
++;
3110 if (expr
->symtree
&& expr
->symtree
->n
.sym
)
3111 p
= expr
->symtree
->n
.sym
->attr
.proc
;
3113 if (expr
->value
.function
.isym
&& expr
->value
.function
.isym
->inquiry
)
3114 inquiry_argument
= true;
3115 no_formal_args
= sym
&& is_external_proc (sym
)
3116 && gfc_sym_get_dummy_args (sym
) == NULL
;
3118 if (!resolve_actual_arglist (expr
->value
.function
.actual
,
3121 inquiry_argument
= false;
3125 inquiry_argument
= false;
3127 /* Resume assumed_size checking. */
3128 need_full_assumed_size
--;
3130 /* If the procedure is external, check for usage. */
3131 if (sym
&& is_external_proc (sym
))
3132 resolve_global_procedure (sym
, &expr
->where
,
3133 &expr
->value
.function
.actual
, 0);
3135 if (sym
&& sym
->ts
.type
== BT_CHARACTER
3137 && sym
->ts
.u
.cl
->length
== NULL
3139 && !sym
->ts
.deferred
3140 && expr
->value
.function
.esym
== NULL
3141 && !sym
->attr
.contained
)
3143 /* Internal procedures are taken care of in resolve_contained_fntype. */
3144 gfc_error ("Function %qs is declared CHARACTER(*) and cannot "
3145 "be used at %L since it is not a dummy argument",
3146 sym
->name
, &expr
->where
);
3150 /* See if function is already resolved. */
3152 if (expr
->value
.function
.name
!= NULL
3153 || expr
->value
.function
.isym
!= NULL
)
3155 if (expr
->ts
.type
== BT_UNKNOWN
)
3161 /* Apply the rules of section 14.1.2. */
3163 switch (procedure_kind (sym
))
3166 t
= resolve_generic_f (expr
);
3169 case PTYPE_SPECIFIC
:
3170 t
= resolve_specific_f (expr
);
3174 t
= resolve_unknown_f (expr
);
3178 gfc_internal_error ("resolve_function(): bad function type");
3182 /* If the expression is still a function (it might have simplified),
3183 then we check to see if we are calling an elemental function. */
3185 if (expr
->expr_type
!= EXPR_FUNCTION
)
3188 temp
= need_full_assumed_size
;
3189 need_full_assumed_size
= 0;
3191 if (!resolve_elemental_actual (expr
, NULL
))
3194 if (omp_workshare_flag
3195 && expr
->value
.function
.esym
3196 && ! gfc_elemental (expr
->value
.function
.esym
))
3198 gfc_error ("User defined non-ELEMENTAL function %qs at %L not allowed "
3199 "in WORKSHARE construct", expr
->value
.function
.esym
->name
,
3204 #define GENERIC_ID expr->value.function.isym->id
3205 else if (expr
->value
.function
.actual
!= NULL
3206 && expr
->value
.function
.isym
!= NULL
3207 && GENERIC_ID
!= GFC_ISYM_LBOUND
3208 && GENERIC_ID
!= GFC_ISYM_LCOBOUND
3209 && GENERIC_ID
!= GFC_ISYM_UCOBOUND
3210 && GENERIC_ID
!= GFC_ISYM_LEN
3211 && GENERIC_ID
!= GFC_ISYM_LOC
3212 && GENERIC_ID
!= GFC_ISYM_C_LOC
3213 && GENERIC_ID
!= GFC_ISYM_PRESENT
)
3215 /* Array intrinsics must also have the last upper bound of an
3216 assumed size array argument. UBOUND and SIZE have to be
3217 excluded from the check if the second argument is anything
3220 for (arg
= expr
->value
.function
.actual
; arg
; arg
= arg
->next
)
3222 if ((GENERIC_ID
== GFC_ISYM_UBOUND
|| GENERIC_ID
== GFC_ISYM_SIZE
)
3223 && arg
== expr
->value
.function
.actual
3224 && arg
->next
!= NULL
&& arg
->next
->expr
)
3226 if (arg
->next
->expr
->expr_type
!= EXPR_CONSTANT
)
3229 if (arg
->next
->name
&& strncmp (arg
->next
->name
, "kind", 4) == 0)
3232 if ((int)mpz_get_si (arg
->next
->expr
->value
.integer
)
3237 if (arg
->expr
!= NULL
3238 && arg
->expr
->rank
> 0
3239 && resolve_assumed_size_actual (arg
->expr
))
3245 need_full_assumed_size
= temp
;
3247 if (!check_pure_function(expr
))
3250 /* Functions without the RECURSIVE attribution are not allowed to
3251 * call themselves. */
3252 if (expr
->value
.function
.esym
&& !expr
->value
.function
.esym
->attr
.recursive
)
3255 esym
= expr
->value
.function
.esym
;
3257 if (is_illegal_recursion (esym
, gfc_current_ns
))
3259 if (esym
->attr
.entry
&& esym
->ns
->entries
)
3260 gfc_error ("ENTRY %qs at %L cannot be called recursively, as"
3261 " function %qs is not RECURSIVE",
3262 esym
->name
, &expr
->where
, esym
->ns
->entries
->sym
->name
);
3264 gfc_error ("Function %qs at %L cannot be called recursively, as it"
3265 " is not RECURSIVE", esym
->name
, &expr
->where
);
3271 /* Character lengths of use associated functions may contains references to
3272 symbols not referenced from the current program unit otherwise. Make sure
3273 those symbols are marked as referenced. */
3275 if (expr
->ts
.type
== BT_CHARACTER
&& expr
->value
.function
.esym
3276 && expr
->value
.function
.esym
->attr
.use_assoc
)
3278 gfc_expr_set_symbols_referenced (expr
->ts
.u
.cl
->length
);
3281 /* Make sure that the expression has a typespec that works. */
3282 if (expr
->ts
.type
== BT_UNKNOWN
)
3284 if (expr
->symtree
->n
.sym
->result
3285 && expr
->symtree
->n
.sym
->result
->ts
.type
!= BT_UNKNOWN
3286 && !expr
->symtree
->n
.sym
->result
->attr
.proc_pointer
)
3287 expr
->ts
= expr
->symtree
->n
.sym
->result
->ts
;
3290 if (!expr
->ref
&& !expr
->value
.function
.isym
)
3292 if (expr
->value
.function
.esym
)
3293 update_current_proc_array_outer_dependency (expr
->value
.function
.esym
);
3295 update_current_proc_array_outer_dependency (sym
);
3298 /* typebound procedure: Assume the worst. */
3299 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3305 /************* Subroutine resolution *************/
3308 pure_subroutine (gfc_symbol
*sym
, const char *name
, locus
*loc
)
3315 gfc_error ("Subroutine call to %qs in FORALL block at %L is not PURE",
3319 else if (gfc_do_concurrent_flag
)
3321 gfc_error ("Subroutine call to %qs in DO CONCURRENT block at %L is not "
3325 else if (gfc_pure (NULL
))
3327 gfc_error ("Subroutine call to %qs at %L is not PURE", name
, loc
);
3331 gfc_unset_implicit_pure (NULL
);
3337 resolve_generic_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3341 if (sym
->attr
.generic
)
3343 s
= gfc_search_interface (sym
->generic
, 1, &c
->ext
.actual
);
3346 c
->resolved_sym
= s
;
3347 if (!pure_subroutine (s
, s
->name
, &c
->loc
))
3352 /* TODO: Need to search for elemental references in generic interface. */
3355 if (sym
->attr
.intrinsic
)
3356 return gfc_intrinsic_sub_interface (c
, 0);
3363 resolve_generic_s (gfc_code
*c
)
3368 sym
= c
->symtree
->n
.sym
;
3372 m
= resolve_generic_s0 (c
, sym
);
3375 else if (m
== MATCH_ERROR
)
3379 if (sym
->ns
->parent
== NULL
)
3381 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3385 if (!generic_sym (sym
))
3389 /* Last ditch attempt. See if the reference is to an intrinsic
3390 that possesses a matching interface. 14.1.2.4 */
3391 sym
= c
->symtree
->n
.sym
;
3393 if (!gfc_is_intrinsic (sym
, 1, c
->loc
))
3395 gfc_error ("There is no specific subroutine for the generic %qs at %L",
3396 sym
->name
, &c
->loc
);
3400 m
= gfc_intrinsic_sub_interface (c
, 0);
3404 gfc_error ("Generic subroutine %qs at %L is not consistent with an "
3405 "intrinsic subroutine interface", sym
->name
, &c
->loc
);
3411 /* Resolve a subroutine call known to be specific. */
3414 resolve_specific_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3418 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
3420 if (sym
->attr
.dummy
)
3422 sym
->attr
.proc
= PROC_DUMMY
;
3426 sym
->attr
.proc
= PROC_EXTERNAL
;
3430 if (sym
->attr
.proc
== PROC_MODULE
|| sym
->attr
.proc
== PROC_INTERNAL
)
3433 if (sym
->attr
.intrinsic
)
3435 m
= gfc_intrinsic_sub_interface (c
, 1);
3439 gfc_error ("Subroutine %qs at %L is INTRINSIC but is not compatible "
3440 "with an intrinsic", sym
->name
, &c
->loc
);
3448 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3450 c
->resolved_sym
= sym
;
3451 if (!pure_subroutine (sym
, sym
->name
, &c
->loc
))
3459 resolve_specific_s (gfc_code
*c
)
3464 sym
= c
->symtree
->n
.sym
;
3468 m
= resolve_specific_s0 (c
, sym
);
3471 if (m
== MATCH_ERROR
)
3474 if (sym
->ns
->parent
== NULL
)
3477 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3483 sym
= c
->symtree
->n
.sym
;
3484 gfc_error ("Unable to resolve the specific subroutine %qs at %L",
3485 sym
->name
, &c
->loc
);
3491 /* Resolve a subroutine call not known to be generic nor specific. */
3494 resolve_unknown_s (gfc_code
*c
)
3498 sym
= c
->symtree
->n
.sym
;
3500 if (sym
->attr
.dummy
)
3502 sym
->attr
.proc
= PROC_DUMMY
;
3506 /* See if we have an intrinsic function reference. */
3508 if (gfc_is_intrinsic (sym
, 1, c
->loc
))
3510 if (gfc_intrinsic_sub_interface (c
, 1) == MATCH_YES
)
3515 /* The reference is to an external name. */
3518 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3520 c
->resolved_sym
= sym
;
3522 return pure_subroutine (sym
, sym
->name
, &c
->loc
);
3526 /* Resolve a subroutine call. Although it was tempting to use the same code
3527 for functions, subroutines and functions are stored differently and this
3528 makes things awkward. */
3531 resolve_call (gfc_code
*c
)
3534 procedure_type ptype
= PROC_INTRINSIC
;
3535 gfc_symbol
*csym
, *sym
;
3536 bool no_formal_args
;
3538 csym
= c
->symtree
? c
->symtree
->n
.sym
: NULL
;
3540 if (csym
&& csym
->ts
.type
!= BT_UNKNOWN
)
3542 gfc_error ("%qs at %L has a type, which is not consistent with "
3543 "the CALL at %L", csym
->name
, &csym
->declared_at
, &c
->loc
);
3547 if (csym
&& gfc_current_ns
->parent
&& csym
->ns
!= gfc_current_ns
)
3550 gfc_find_sym_tree (c
->symtree
->name
, gfc_current_ns
, 1, &st
);
3551 sym
= st
? st
->n
.sym
: NULL
;
3552 if (sym
&& csym
!= sym
3553 && sym
->ns
== gfc_current_ns
3554 && sym
->attr
.flavor
== FL_PROCEDURE
3555 && sym
->attr
.contained
)
3558 if (csym
->attr
.generic
)
3559 c
->symtree
->n
.sym
= sym
;
3562 csym
= c
->symtree
->n
.sym
;
3566 /* If this ia a deferred TBP, c->expr1 will be set. */
3567 if (!c
->expr1
&& csym
)
3569 if (csym
->attr
.abstract
)
3571 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3572 csym
->name
, &c
->loc
);
3576 /* Subroutines without the RECURSIVE attribution are not allowed to
3578 if (is_illegal_recursion (csym
, gfc_current_ns
))
3580 if (csym
->attr
.entry
&& csym
->ns
->entries
)
3581 gfc_error ("ENTRY %qs at %L cannot be called recursively, "
3582 "as subroutine %qs is not RECURSIVE",
3583 csym
->name
, &c
->loc
, csym
->ns
->entries
->sym
->name
);
3585 gfc_error ("SUBROUTINE %qs at %L cannot be called recursively, "
3586 "as it is not RECURSIVE", csym
->name
, &c
->loc
);
3592 /* Switch off assumed size checking and do this again for certain kinds
3593 of procedure, once the procedure itself is resolved. */
3594 need_full_assumed_size
++;
3597 ptype
= csym
->attr
.proc
;
3599 no_formal_args
= csym
&& is_external_proc (csym
)
3600 && gfc_sym_get_dummy_args (csym
) == NULL
;
3601 if (!resolve_actual_arglist (c
->ext
.actual
, ptype
, no_formal_args
))
3604 /* Resume assumed_size checking. */
3605 need_full_assumed_size
--;
3607 /* If external, check for usage. */
3608 if (csym
&& is_external_proc (csym
))
3609 resolve_global_procedure (csym
, &c
->loc
, &c
->ext
.actual
, 1);
3612 if (c
->resolved_sym
== NULL
)
3614 c
->resolved_isym
= NULL
;
3615 switch (procedure_kind (csym
))
3618 t
= resolve_generic_s (c
);
3621 case PTYPE_SPECIFIC
:
3622 t
= resolve_specific_s (c
);
3626 t
= resolve_unknown_s (c
);
3630 gfc_internal_error ("resolve_subroutine(): bad function type");
3634 /* Some checks of elemental subroutine actual arguments. */
3635 if (!resolve_elemental_actual (NULL
, c
))
3639 update_current_proc_array_outer_dependency (csym
);
3641 /* Typebound procedure: Assume the worst. */
3642 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3648 /* Compare the shapes of two arrays that have non-NULL shapes. If both
3649 op1->shape and op2->shape are non-NULL return true if their shapes
3650 match. If both op1->shape and op2->shape are non-NULL return false
3651 if their shapes do not match. If either op1->shape or op2->shape is
3652 NULL, return true. */
3655 compare_shapes (gfc_expr
*op1
, gfc_expr
*op2
)
3662 if (op1
->shape
!= NULL
&& op2
->shape
!= NULL
)
3664 for (i
= 0; i
< op1
->rank
; i
++)
3666 if (mpz_cmp (op1
->shape
[i
], op2
->shape
[i
]) != 0)
3668 gfc_error ("Shapes for operands at %L and %L are not conformable",
3669 &op1
->where
, &op2
->where
);
3679 /* Convert a logical operator to the corresponding bitwise intrinsic call.
3680 For example A .AND. B becomes IAND(A, B). */
3682 logical_to_bitwise (gfc_expr
*e
)
3684 gfc_expr
*tmp
, *op1
, *op2
;
3686 gfc_actual_arglist
*args
= NULL
;
3688 gcc_assert (e
->expr_type
== EXPR_OP
);
3690 isym
= GFC_ISYM_NONE
;
3691 op1
= e
->value
.op
.op1
;
3692 op2
= e
->value
.op
.op2
;
3694 switch (e
->value
.op
.op
)
3697 isym
= GFC_ISYM_NOT
;
3700 isym
= GFC_ISYM_IAND
;
3703 isym
= GFC_ISYM_IOR
;
3705 case INTRINSIC_NEQV
:
3706 isym
= GFC_ISYM_IEOR
;
3709 /* "Bitwise eqv" is just the complement of NEQV === IEOR.
3710 Change the old expression to NEQV, which will get replaced by IEOR,
3711 and wrap it in NOT. */
3712 tmp
= gfc_copy_expr (e
);
3713 tmp
->value
.op
.op
= INTRINSIC_NEQV
;
3714 tmp
= logical_to_bitwise (tmp
);
3715 isym
= GFC_ISYM_NOT
;
3720 gfc_internal_error ("logical_to_bitwise(): Bad intrinsic");
3723 /* Inherit the original operation's operands as arguments. */
3724 args
= gfc_get_actual_arglist ();
3728 args
->next
= gfc_get_actual_arglist ();
3729 args
->next
->expr
= op2
;
3732 /* Convert the expression to a function call. */
3733 e
->expr_type
= EXPR_FUNCTION
;
3734 e
->value
.function
.actual
= args
;
3735 e
->value
.function
.isym
= gfc_intrinsic_function_by_id (isym
);
3736 e
->value
.function
.name
= e
->value
.function
.isym
->name
;
3737 e
->value
.function
.esym
= NULL
;
3739 /* Make up a pre-resolved function call symtree if we need to. */
3740 if (!e
->symtree
|| !e
->symtree
->n
.sym
)
3743 gfc_get_ha_sym_tree (e
->value
.function
.isym
->name
, &e
->symtree
);
3744 sym
= e
->symtree
->n
.sym
;
3746 sym
->attr
.flavor
= FL_PROCEDURE
;
3747 sym
->attr
.function
= 1;
3748 sym
->attr
.elemental
= 1;
3750 sym
->attr
.referenced
= 1;
3751 gfc_intrinsic_symbol (sym
);
3752 gfc_commit_symbol (sym
);
3755 args
->name
= e
->value
.function
.isym
->formal
->name
;
3756 if (e
->value
.function
.isym
->formal
->next
)
3757 args
->next
->name
= e
->value
.function
.isym
->formal
->next
->name
;
3762 /* Recursively append candidate UOP to CANDIDATES. Store the number of
3763 candidates in CANDIDATES_LEN. */
3765 lookup_uop_fuzzy_find_candidates (gfc_symtree
*uop
,
3767 size_t &candidates_len
)
3774 /* Not sure how to properly filter here. Use all for a start.
3775 n.uop.op is NULL for empty interface operators (is that legal?) disregard
3776 these as i suppose they don't make terribly sense. */
3778 if (uop
->n
.uop
->op
!= NULL
)
3779 vec_push (candidates
, candidates_len
, uop
->name
);
3783 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3787 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3790 /* Lookup user-operator OP fuzzily, taking names in UOP into account. */
3793 lookup_uop_fuzzy (const char *op
, gfc_symtree
*uop
)
3795 char **candidates
= NULL
;
3796 size_t candidates_len
= 0;
3797 lookup_uop_fuzzy_find_candidates (uop
, candidates
, candidates_len
);
3798 return gfc_closest_fuzzy_match (op
, candidates
);
3802 /* Resolve an operator expression node. This can involve replacing the
3803 operation with a user defined function call. */
3806 resolve_operator (gfc_expr
*e
)
3808 gfc_expr
*op1
, *op2
;
3810 bool dual_locus_error
;
3813 /* Resolve all subnodes-- give them types. */
3815 switch (e
->value
.op
.op
)
3818 if (!gfc_resolve_expr (e
->value
.op
.op2
))
3824 case INTRINSIC_UPLUS
:
3825 case INTRINSIC_UMINUS
:
3826 case INTRINSIC_PARENTHESES
:
3827 if (!gfc_resolve_expr (e
->value
.op
.op1
))
3832 /* Typecheck the new node. */
3834 op1
= e
->value
.op
.op1
;
3835 op2
= e
->value
.op
.op2
;
3836 dual_locus_error
= false;
3838 if ((op1
&& op1
->expr_type
== EXPR_NULL
)
3839 || (op2
&& op2
->expr_type
== EXPR_NULL
))
3841 sprintf (msg
, _("Invalid context for NULL() pointer at %%L"));
3845 switch (e
->value
.op
.op
)
3847 case INTRINSIC_UPLUS
:
3848 case INTRINSIC_UMINUS
:
3849 if (op1
->ts
.type
== BT_INTEGER
3850 || op1
->ts
.type
== BT_REAL
3851 || op1
->ts
.type
== BT_COMPLEX
)
3857 sprintf (msg
, _("Operand of unary numeric operator %%<%s%%> at %%L is %s"),
3858 gfc_op2string (e
->value
.op
.op
), gfc_typename (&e
->ts
));
3861 case INTRINSIC_PLUS
:
3862 case INTRINSIC_MINUS
:
3863 case INTRINSIC_TIMES
:
3864 case INTRINSIC_DIVIDE
:
3865 case INTRINSIC_POWER
:
3866 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
3868 gfc_type_convert_binary (e
, 1);
3873 _("Operands of binary numeric operator %%<%s%%> at %%L are %s/%s"),
3874 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
3875 gfc_typename (&op2
->ts
));
3878 case INTRINSIC_CONCAT
:
3879 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
3880 && op1
->ts
.kind
== op2
->ts
.kind
)
3882 e
->ts
.type
= BT_CHARACTER
;
3883 e
->ts
.kind
= op1
->ts
.kind
;
3888 _("Operands of string concatenation operator at %%L are %s/%s"),
3889 gfc_typename (&op1
->ts
), gfc_typename (&op2
->ts
));
3895 case INTRINSIC_NEQV
:
3896 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
3898 e
->ts
.type
= BT_LOGICAL
;
3899 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
3900 if (op1
->ts
.kind
< e
->ts
.kind
)
3901 gfc_convert_type (op1
, &e
->ts
, 2);
3902 else if (op2
->ts
.kind
< e
->ts
.kind
)
3903 gfc_convert_type (op2
, &e
->ts
, 2);
3907 /* Logical ops on integers become bitwise ops with -fdec. */
3909 && (op1
->ts
.type
== BT_INTEGER
|| op2
->ts
.type
== BT_INTEGER
))
3911 e
->ts
.type
= BT_INTEGER
;
3912 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
3913 if (op1
->ts
.type
!= e
->ts
.type
|| op1
->ts
.kind
!= e
->ts
.kind
)
3914 gfc_convert_type (op1
, &e
->ts
, 1);
3915 if (op2
->ts
.type
!= e
->ts
.type
|| op2
->ts
.kind
!= e
->ts
.kind
)
3916 gfc_convert_type (op2
, &e
->ts
, 1);
3917 e
= logical_to_bitwise (e
);
3918 return resolve_function (e
);
3921 sprintf (msg
, _("Operands of logical operator %%<%s%%> at %%L are %s/%s"),
3922 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
3923 gfc_typename (&op2
->ts
));
3928 /* Logical ops on integers become bitwise ops with -fdec. */
3929 if (flag_dec
&& op1
->ts
.type
== BT_INTEGER
)
3931 e
->ts
.type
= BT_INTEGER
;
3932 e
->ts
.kind
= op1
->ts
.kind
;
3933 e
= logical_to_bitwise (e
);
3934 return resolve_function (e
);
3937 if (op1
->ts
.type
== BT_LOGICAL
)
3939 e
->ts
.type
= BT_LOGICAL
;
3940 e
->ts
.kind
= op1
->ts
.kind
;
3944 sprintf (msg
, _("Operand of .not. operator at %%L is %s"),
3945 gfc_typename (&op1
->ts
));
3949 case INTRINSIC_GT_OS
:
3951 case INTRINSIC_GE_OS
:
3953 case INTRINSIC_LT_OS
:
3955 case INTRINSIC_LE_OS
:
3956 if (op1
->ts
.type
== BT_COMPLEX
|| op2
->ts
.type
== BT_COMPLEX
)
3958 strcpy (msg
, _("COMPLEX quantities cannot be compared at %L"));
3965 case INTRINSIC_EQ_OS
:
3967 case INTRINSIC_NE_OS
:
3968 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
3969 && op1
->ts
.kind
== op2
->ts
.kind
)
3971 e
->ts
.type
= BT_LOGICAL
;
3972 e
->ts
.kind
= gfc_default_logical_kind
;
3976 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
3978 gfc_type_convert_binary (e
, 1);
3980 e
->ts
.type
= BT_LOGICAL
;
3981 e
->ts
.kind
= gfc_default_logical_kind
;
3983 if (warn_compare_reals
)
3985 gfc_intrinsic_op op
= e
->value
.op
.op
;
3987 /* Type conversion has made sure that the types of op1 and op2
3988 agree, so it is only necessary to check the first one. */
3989 if ((op1
->ts
.type
== BT_REAL
|| op1
->ts
.type
== BT_COMPLEX
)
3990 && (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
3991 || op
== INTRINSIC_NE
|| op
== INTRINSIC_NE_OS
))
3995 if (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
)
3996 msg
= "Equality comparison for %s at %L";
3998 msg
= "Inequality comparison for %s at %L";
4000 gfc_warning (OPT_Wcompare_reals
, msg
,
4001 gfc_typename (&op1
->ts
), &op1
->where
);
4008 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
4010 _("Logicals at %%L must be compared with %s instead of %s"),
4011 (e
->value
.op
.op
== INTRINSIC_EQ
4012 || e
->value
.op
.op
== INTRINSIC_EQ_OS
)
4013 ? ".eqv." : ".neqv.", gfc_op2string (e
->value
.op
.op
));
4016 _("Operands of comparison operator %%<%s%%> at %%L are %s/%s"),
4017 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
4018 gfc_typename (&op2
->ts
));
4022 case INTRINSIC_USER
:
4023 if (e
->value
.op
.uop
->op
== NULL
)
4025 const char *name
= e
->value
.op
.uop
->name
;
4026 const char *guessed
;
4027 guessed
= lookup_uop_fuzzy (name
, e
->value
.op
.uop
->ns
->uop_root
);
4029 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L; did you mean '%s'?"),
4032 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L"), name
);
4034 else if (op2
== NULL
)
4035 sprintf (msg
, _("Operand of user operator %%<%s%%> at %%L is %s"),
4036 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
));
4039 sprintf (msg
, _("Operands of user operator %%<%s%%> at %%L are %s/%s"),
4040 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
),
4041 gfc_typename (&op2
->ts
));
4042 e
->value
.op
.uop
->op
->sym
->attr
.referenced
= 1;
4047 case INTRINSIC_PARENTHESES
:
4049 if (e
->ts
.type
== BT_CHARACTER
)
4050 e
->ts
.u
.cl
= op1
->ts
.u
.cl
;
4054 gfc_internal_error ("resolve_operator(): Bad intrinsic");
4057 /* Deal with arrayness of an operand through an operator. */
4061 switch (e
->value
.op
.op
)
4063 case INTRINSIC_PLUS
:
4064 case INTRINSIC_MINUS
:
4065 case INTRINSIC_TIMES
:
4066 case INTRINSIC_DIVIDE
:
4067 case INTRINSIC_POWER
:
4068 case INTRINSIC_CONCAT
:
4072 case INTRINSIC_NEQV
:
4074 case INTRINSIC_EQ_OS
:
4076 case INTRINSIC_NE_OS
:
4078 case INTRINSIC_GT_OS
:
4080 case INTRINSIC_GE_OS
:
4082 case INTRINSIC_LT_OS
:
4084 case INTRINSIC_LE_OS
:
4086 if (op1
->rank
== 0 && op2
->rank
== 0)
4089 if (op1
->rank
== 0 && op2
->rank
!= 0)
4091 e
->rank
= op2
->rank
;
4093 if (e
->shape
== NULL
)
4094 e
->shape
= gfc_copy_shape (op2
->shape
, op2
->rank
);
4097 if (op1
->rank
!= 0 && op2
->rank
== 0)
4099 e
->rank
= op1
->rank
;
4101 if (e
->shape
== NULL
)
4102 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4105 if (op1
->rank
!= 0 && op2
->rank
!= 0)
4107 if (op1
->rank
== op2
->rank
)
4109 e
->rank
= op1
->rank
;
4110 if (e
->shape
== NULL
)
4112 t
= compare_shapes (op1
, op2
);
4116 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4121 /* Allow higher level expressions to work. */
4124 /* Try user-defined operators, and otherwise throw an error. */
4125 dual_locus_error
= true;
4127 _("Inconsistent ranks for operator at %%L and %%L"));
4134 case INTRINSIC_PARENTHESES
:
4136 case INTRINSIC_UPLUS
:
4137 case INTRINSIC_UMINUS
:
4138 /* Simply copy arrayness attribute */
4139 e
->rank
= op1
->rank
;
4141 if (e
->shape
== NULL
)
4142 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4150 /* Attempt to simplify the expression. */
4153 t
= gfc_simplify_expr (e
, 0);
4154 /* Some calls do not succeed in simplification and return false
4155 even though there is no error; e.g. variable references to
4156 PARAMETER arrays. */
4157 if (!gfc_is_constant_expr (e
))
4165 match m
= gfc_extend_expr (e
);
4168 if (m
== MATCH_ERROR
)
4172 if (dual_locus_error
)
4173 gfc_error (msg
, &op1
->where
, &op2
->where
);
4175 gfc_error (msg
, &e
->where
);
4181 /************** Array resolution subroutines **************/
4184 { CMP_LT
, CMP_EQ
, CMP_GT
, CMP_UNKNOWN
};
4186 /* Compare two integer expressions. */
4188 static compare_result
4189 compare_bound (gfc_expr
*a
, gfc_expr
*b
)
4193 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
4194 || b
== NULL
|| b
->expr_type
!= EXPR_CONSTANT
)
4197 /* If either of the types isn't INTEGER, we must have
4198 raised an error earlier. */
4200 if (a
->ts
.type
!= BT_INTEGER
|| b
->ts
.type
!= BT_INTEGER
)
4203 i
= mpz_cmp (a
->value
.integer
, b
->value
.integer
);
4213 /* Compare an integer expression with an integer. */
4215 static compare_result
4216 compare_bound_int (gfc_expr
*a
, int b
)
4220 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4223 if (a
->ts
.type
!= BT_INTEGER
)
4224 gfc_internal_error ("compare_bound_int(): Bad expression");
4226 i
= mpz_cmp_si (a
->value
.integer
, b
);
4236 /* Compare an integer expression with a mpz_t. */
4238 static compare_result
4239 compare_bound_mpz_t (gfc_expr
*a
, mpz_t b
)
4243 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4246 if (a
->ts
.type
!= BT_INTEGER
)
4247 gfc_internal_error ("compare_bound_int(): Bad expression");
4249 i
= mpz_cmp (a
->value
.integer
, b
);
4259 /* Compute the last value of a sequence given by a triplet.
4260 Return 0 if it wasn't able to compute the last value, or if the
4261 sequence if empty, and 1 otherwise. */
4264 compute_last_value_for_triplet (gfc_expr
*start
, gfc_expr
*end
,
4265 gfc_expr
*stride
, mpz_t last
)
4269 if (start
== NULL
|| start
->expr_type
!= EXPR_CONSTANT
4270 || end
== NULL
|| end
->expr_type
!= EXPR_CONSTANT
4271 || (stride
!= NULL
&& stride
->expr_type
!= EXPR_CONSTANT
))
4274 if (start
->ts
.type
!= BT_INTEGER
|| end
->ts
.type
!= BT_INTEGER
4275 || (stride
!= NULL
&& stride
->ts
.type
!= BT_INTEGER
))
4278 if (stride
== NULL
|| compare_bound_int (stride
, 1) == CMP_EQ
)
4280 if (compare_bound (start
, end
) == CMP_GT
)
4282 mpz_set (last
, end
->value
.integer
);
4286 if (compare_bound_int (stride
, 0) == CMP_GT
)
4288 /* Stride is positive */
4289 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) > 0)
4294 /* Stride is negative */
4295 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) < 0)
4300 mpz_sub (rem
, end
->value
.integer
, start
->value
.integer
);
4301 mpz_tdiv_r (rem
, rem
, stride
->value
.integer
);
4302 mpz_sub (last
, end
->value
.integer
, rem
);
4309 /* Compare a single dimension of an array reference to the array
4313 check_dimension (int i
, gfc_array_ref
*ar
, gfc_array_spec
*as
)
4317 if (ar
->dimen_type
[i
] == DIMEN_STAR
)
4319 gcc_assert (ar
->stride
[i
] == NULL
);
4320 /* This implies [*] as [*:] and [*:3] are not possible. */
4321 if (ar
->start
[i
] == NULL
)
4323 gcc_assert (ar
->end
[i
] == NULL
);
4328 /* Given start, end and stride values, calculate the minimum and
4329 maximum referenced indexes. */
4331 switch (ar
->dimen_type
[i
])
4334 case DIMEN_THIS_IMAGE
:
4339 if (compare_bound (ar
->start
[i
], as
->lower
[i
]) == CMP_LT
)
4342 gfc_warning (0, "Array reference at %L is out of bounds "
4343 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4344 mpz_get_si (ar
->start
[i
]->value
.integer
),
4345 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4347 gfc_warning (0, "Array reference at %L is out of bounds "
4348 "(%ld < %ld) in codimension %d", &ar
->c_where
[i
],
4349 mpz_get_si (ar
->start
[i
]->value
.integer
),
4350 mpz_get_si (as
->lower
[i
]->value
.integer
),
4354 if (compare_bound (ar
->start
[i
], as
->upper
[i
]) == CMP_GT
)
4357 gfc_warning (0, "Array reference at %L is out of bounds "
4358 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4359 mpz_get_si (ar
->start
[i
]->value
.integer
),
4360 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4362 gfc_warning (0, "Array reference at %L is out of bounds "
4363 "(%ld > %ld) in codimension %d", &ar
->c_where
[i
],
4364 mpz_get_si (ar
->start
[i
]->value
.integer
),
4365 mpz_get_si (as
->upper
[i
]->value
.integer
),
4374 #define AR_START (ar->start[i] ? ar->start[i] : as->lower[i])
4375 #define AR_END (ar->end[i] ? ar->end[i] : as->upper[i])
4377 compare_result comp_start_end
= compare_bound (AR_START
, AR_END
);
4379 /* Check for zero stride, which is not allowed. */
4380 if (compare_bound_int (ar
->stride
[i
], 0) == CMP_EQ
)
4382 gfc_error ("Illegal stride of zero at %L", &ar
->c_where
[i
]);
4386 /* if start == len || (stride > 0 && start < len)
4387 || (stride < 0 && start > len),
4388 then the array section contains at least one element. In this
4389 case, there is an out-of-bounds access if
4390 (start < lower || start > upper). */
4391 if (compare_bound (AR_START
, AR_END
) == CMP_EQ
4392 || ((compare_bound_int (ar
->stride
[i
], 0) == CMP_GT
4393 || ar
->stride
[i
] == NULL
) && comp_start_end
== CMP_LT
)
4394 || (compare_bound_int (ar
->stride
[i
], 0) == CMP_LT
4395 && comp_start_end
== CMP_GT
))
4397 if (compare_bound (AR_START
, as
->lower
[i
]) == CMP_LT
)
4399 gfc_warning (0, "Lower array reference at %L is out of bounds "
4400 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4401 mpz_get_si (AR_START
->value
.integer
),
4402 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4405 if (compare_bound (AR_START
, as
->upper
[i
]) == CMP_GT
)
4407 gfc_warning (0, "Lower array reference at %L is out of bounds "
4408 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4409 mpz_get_si (AR_START
->value
.integer
),
4410 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4415 /* If we can compute the highest index of the array section,
4416 then it also has to be between lower and upper. */
4417 mpz_init (last_value
);
4418 if (compute_last_value_for_triplet (AR_START
, AR_END
, ar
->stride
[i
],
4421 if (compare_bound_mpz_t (as
->lower
[i
], last_value
) == CMP_GT
)
4423 gfc_warning (0, "Upper array reference at %L is out of bounds "
4424 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4425 mpz_get_si (last_value
),
4426 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4427 mpz_clear (last_value
);
4430 if (compare_bound_mpz_t (as
->upper
[i
], last_value
) == CMP_LT
)
4432 gfc_warning (0, "Upper array reference at %L is out of bounds "
4433 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4434 mpz_get_si (last_value
),
4435 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4436 mpz_clear (last_value
);
4440 mpz_clear (last_value
);
4448 gfc_internal_error ("check_dimension(): Bad array reference");
4455 /* Compare an array reference with an array specification. */
4458 compare_spec_to_ref (gfc_array_ref
*ar
)
4465 /* TODO: Full array sections are only allowed as actual parameters. */
4466 if (as
->type
== AS_ASSUMED_SIZE
4467 && (/*ar->type == AR_FULL
4468 ||*/ (ar
->type
== AR_SECTION
4469 && ar
->dimen_type
[i
] == DIMEN_RANGE
&& ar
->end
[i
] == NULL
)))
4471 gfc_error ("Rightmost upper bound of assumed size array section "
4472 "not specified at %L", &ar
->where
);
4476 if (ar
->type
== AR_FULL
)
4479 if (as
->rank
!= ar
->dimen
)
4481 gfc_error ("Rank mismatch in array reference at %L (%d/%d)",
4482 &ar
->where
, ar
->dimen
, as
->rank
);
4486 /* ar->codimen == 0 is a local array. */
4487 if (as
->corank
!= ar
->codimen
&& ar
->codimen
!= 0)
4489 gfc_error ("Coindex rank mismatch in array reference at %L (%d/%d)",
4490 &ar
->where
, ar
->codimen
, as
->corank
);
4494 for (i
= 0; i
< as
->rank
; i
++)
4495 if (!check_dimension (i
, ar
, as
))
4498 /* Local access has no coarray spec. */
4499 if (ar
->codimen
!= 0)
4500 for (i
= as
->rank
; i
< as
->rank
+ as
->corank
; i
++)
4502 if (ar
->dimen_type
[i
] != DIMEN_ELEMENT
&& !ar
->in_allocate
4503 && ar
->dimen_type
[i
] != DIMEN_THIS_IMAGE
)
4505 gfc_error ("Coindex of codimension %d must be a scalar at %L",
4506 i
+ 1 - as
->rank
, &ar
->where
);
4509 if (!check_dimension (i
, ar
, as
))
4517 /* Resolve one part of an array index. */
4520 gfc_resolve_index_1 (gfc_expr
*index
, int check_scalar
,
4521 int force_index_integer_kind
)
4528 if (!gfc_resolve_expr (index
))
4531 if (check_scalar
&& index
->rank
!= 0)
4533 gfc_error ("Array index at %L must be scalar", &index
->where
);
4537 if (index
->ts
.type
!= BT_INTEGER
&& index
->ts
.type
!= BT_REAL
)
4539 gfc_error ("Array index at %L must be of INTEGER type, found %s",
4540 &index
->where
, gfc_basic_typename (index
->ts
.type
));
4544 if (index
->ts
.type
== BT_REAL
)
4545 if (!gfc_notify_std (GFC_STD_LEGACY
, "REAL array index at %L",
4549 if ((index
->ts
.kind
!= gfc_index_integer_kind
4550 && force_index_integer_kind
)
4551 || index
->ts
.type
!= BT_INTEGER
)
4554 ts
.type
= BT_INTEGER
;
4555 ts
.kind
= gfc_index_integer_kind
;
4557 gfc_convert_type_warn (index
, &ts
, 2, 0);
4563 /* Resolve one part of an array index. */
4566 gfc_resolve_index (gfc_expr
*index
, int check_scalar
)
4568 return gfc_resolve_index_1 (index
, check_scalar
, 1);
4571 /* Resolve a dim argument to an intrinsic function. */
4574 gfc_resolve_dim_arg (gfc_expr
*dim
)
4579 if (!gfc_resolve_expr (dim
))
4584 gfc_error ("Argument dim at %L must be scalar", &dim
->where
);
4589 if (dim
->ts
.type
!= BT_INTEGER
)
4591 gfc_error ("Argument dim at %L must be of INTEGER type", &dim
->where
);
4595 if (dim
->ts
.kind
!= gfc_index_integer_kind
)
4600 ts
.type
= BT_INTEGER
;
4601 ts
.kind
= gfc_index_integer_kind
;
4603 gfc_convert_type_warn (dim
, &ts
, 2, 0);
4609 /* Given an expression that contains array references, update those array
4610 references to point to the right array specifications. While this is
4611 filled in during matching, this information is difficult to save and load
4612 in a module, so we take care of it here.
4614 The idea here is that the original array reference comes from the
4615 base symbol. We traverse the list of reference structures, setting
4616 the stored reference to references. Component references can
4617 provide an additional array specification. */
4620 find_array_spec (gfc_expr
*e
)
4626 if (e
->symtree
->n
.sym
->ts
.type
== BT_CLASS
)
4627 as
= CLASS_DATA (e
->symtree
->n
.sym
)->as
;
4629 as
= e
->symtree
->n
.sym
->as
;
4631 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4636 gfc_internal_error ("find_array_spec(): Missing spec");
4643 c
= ref
->u
.c
.component
;
4644 if (c
->attr
.dimension
)
4647 gfc_internal_error ("find_array_spec(): unused as(1)");
4658 gfc_internal_error ("find_array_spec(): unused as(2)");
4662 /* Resolve an array reference. */
4665 resolve_array_ref (gfc_array_ref
*ar
)
4667 int i
, check_scalar
;
4670 for (i
= 0; i
< ar
->dimen
+ ar
->codimen
; i
++)
4672 check_scalar
= ar
->dimen_type
[i
] == DIMEN_RANGE
;
4674 /* Do not force gfc_index_integer_kind for the start. We can
4675 do fine with any integer kind. This avoids temporary arrays
4676 created for indexing with a vector. */
4677 if (!gfc_resolve_index_1 (ar
->start
[i
], check_scalar
, 0))
4679 if (!gfc_resolve_index (ar
->end
[i
], check_scalar
))
4681 if (!gfc_resolve_index (ar
->stride
[i
], check_scalar
))
4686 if (ar
->dimen_type
[i
] == DIMEN_UNKNOWN
)
4690 ar
->dimen_type
[i
] = DIMEN_ELEMENT
;
4694 ar
->dimen_type
[i
] = DIMEN_VECTOR
;
4695 if (e
->expr_type
== EXPR_VARIABLE
4696 && e
->symtree
->n
.sym
->ts
.type
== BT_DERIVED
)
4697 ar
->start
[i
] = gfc_get_parentheses (e
);
4701 gfc_error ("Array index at %L is an array of rank %d",
4702 &ar
->c_where
[i
], e
->rank
);
4706 /* Fill in the upper bound, which may be lower than the
4707 specified one for something like a(2:10:5), which is
4708 identical to a(2:7:5). Only relevant for strides not equal
4709 to one. Don't try a division by zero. */
4710 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4711 && ar
->stride
[i
] != NULL
&& ar
->stride
[i
]->expr_type
== EXPR_CONSTANT
4712 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 1L) != 0
4713 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 0L) != 0)
4717 if (gfc_ref_dimen_size (ar
, i
, &size
, &end
))
4719 if (ar
->end
[i
] == NULL
)
4722 gfc_get_constant_expr (BT_INTEGER
, gfc_index_integer_kind
,
4724 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4726 else if (ar
->end
[i
]->ts
.type
== BT_INTEGER
4727 && ar
->end
[i
]->expr_type
== EXPR_CONSTANT
)
4729 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4740 if (ar
->type
== AR_FULL
)
4742 if (ar
->as
->rank
== 0)
4743 ar
->type
= AR_ELEMENT
;
4745 /* Make sure array is the same as array(:,:), this way
4746 we don't need to special case all the time. */
4747 ar
->dimen
= ar
->as
->rank
;
4748 for (i
= 0; i
< ar
->dimen
; i
++)
4750 ar
->dimen_type
[i
] = DIMEN_RANGE
;
4752 gcc_assert (ar
->start
[i
] == NULL
);
4753 gcc_assert (ar
->end
[i
] == NULL
);
4754 gcc_assert (ar
->stride
[i
] == NULL
);
4758 /* If the reference type is unknown, figure out what kind it is. */
4760 if (ar
->type
== AR_UNKNOWN
)
4762 ar
->type
= AR_ELEMENT
;
4763 for (i
= 0; i
< ar
->dimen
; i
++)
4764 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4765 || ar
->dimen_type
[i
] == DIMEN_VECTOR
)
4767 ar
->type
= AR_SECTION
;
4772 if (!ar
->as
->cray_pointee
&& !compare_spec_to_ref (ar
))
4775 if (ar
->as
->corank
&& ar
->codimen
== 0)
4778 ar
->codimen
= ar
->as
->corank
;
4779 for (n
= ar
->dimen
; n
< ar
->dimen
+ ar
->codimen
; n
++)
4780 ar
->dimen_type
[n
] = DIMEN_THIS_IMAGE
;
4788 resolve_substring (gfc_ref
*ref
)
4790 int k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
4792 if (ref
->u
.ss
.start
!= NULL
)
4794 if (!gfc_resolve_expr (ref
->u
.ss
.start
))
4797 if (ref
->u
.ss
.start
->ts
.type
!= BT_INTEGER
)
4799 gfc_error ("Substring start index at %L must be of type INTEGER",
4800 &ref
->u
.ss
.start
->where
);
4804 if (ref
->u
.ss
.start
->rank
!= 0)
4806 gfc_error ("Substring start index at %L must be scalar",
4807 &ref
->u
.ss
.start
->where
);
4811 if (compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_LT
4812 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4813 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4815 gfc_error ("Substring start index at %L is less than one",
4816 &ref
->u
.ss
.start
->where
);
4821 if (ref
->u
.ss
.end
!= NULL
)
4823 if (!gfc_resolve_expr (ref
->u
.ss
.end
))
4826 if (ref
->u
.ss
.end
->ts
.type
!= BT_INTEGER
)
4828 gfc_error ("Substring end index at %L must be of type INTEGER",
4829 &ref
->u
.ss
.end
->where
);
4833 if (ref
->u
.ss
.end
->rank
!= 0)
4835 gfc_error ("Substring end index at %L must be scalar",
4836 &ref
->u
.ss
.end
->where
);
4840 if (ref
->u
.ss
.length
!= NULL
4841 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_GT
4842 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4843 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4845 gfc_error ("Substring end index at %L exceeds the string length",
4846 &ref
->u
.ss
.start
->where
);
4850 if (compare_bound_mpz_t (ref
->u
.ss
.end
,
4851 gfc_integer_kinds
[k
].huge
) == CMP_GT
4852 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4853 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4855 gfc_error ("Substring end index at %L is too large",
4856 &ref
->u
.ss
.end
->where
);
4865 /* This function supplies missing substring charlens. */
4868 gfc_resolve_substring_charlen (gfc_expr
*e
)
4871 gfc_expr
*start
, *end
;
4872 gfc_typespec
*ts
= NULL
;
4874 for (char_ref
= e
->ref
; char_ref
; char_ref
= char_ref
->next
)
4876 if (char_ref
->type
== REF_SUBSTRING
)
4878 if (char_ref
->type
== REF_COMPONENT
)
4879 ts
= &char_ref
->u
.c
.component
->ts
;
4885 gcc_assert (char_ref
->next
== NULL
);
4889 if (e
->ts
.u
.cl
->length
)
4890 gfc_free_expr (e
->ts
.u
.cl
->length
);
4891 else if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
->attr
.dummy
)
4895 e
->ts
.type
= BT_CHARACTER
;
4896 e
->ts
.kind
= gfc_default_character_kind
;
4899 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
4901 if (char_ref
->u
.ss
.start
)
4902 start
= gfc_copy_expr (char_ref
->u
.ss
.start
);
4904 start
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 1);
4906 if (char_ref
->u
.ss
.end
)
4907 end
= gfc_copy_expr (char_ref
->u
.ss
.end
);
4908 else if (e
->expr_type
== EXPR_VARIABLE
)
4911 ts
= &e
->symtree
->n
.sym
->ts
;
4912 end
= gfc_copy_expr (ts
->u
.cl
->length
);
4919 gfc_free_expr (start
);
4920 gfc_free_expr (end
);
4924 /* Length = (end - start + 1). */
4925 e
->ts
.u
.cl
->length
= gfc_subtract (end
, start
);
4926 e
->ts
.u
.cl
->length
= gfc_add (e
->ts
.u
.cl
->length
,
4927 gfc_get_int_expr (gfc_charlen_int_kind
,
4930 /* F2008, 6.4.1: Both the starting point and the ending point shall
4931 be within the range 1, 2, ..., n unless the starting point exceeds
4932 the ending point, in which case the substring has length zero. */
4934 if (mpz_cmp_si (e
->ts
.u
.cl
->length
->value
.integer
, 0) < 0)
4935 mpz_set_si (e
->ts
.u
.cl
->length
->value
.integer
, 0);
4937 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
4938 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
4940 /* Make sure that the length is simplified. */
4941 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 1);
4942 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
4946 /* Resolve subtype references. */
4949 resolve_ref (gfc_expr
*expr
)
4951 int current_part_dimension
, n_components
, seen_part_dimension
;
4954 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
4955 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.as
== NULL
)
4957 find_array_spec (expr
);
4961 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
4965 if (!resolve_array_ref (&ref
->u
.ar
))
4973 if (!resolve_substring (ref
))
4978 /* Check constraints on part references. */
4980 current_part_dimension
= 0;
4981 seen_part_dimension
= 0;
4984 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
4989 switch (ref
->u
.ar
.type
)
4992 /* Coarray scalar. */
4993 if (ref
->u
.ar
.as
->rank
== 0)
4995 current_part_dimension
= 0;
5000 current_part_dimension
= 1;
5004 current_part_dimension
= 0;
5008 gfc_internal_error ("resolve_ref(): Bad array reference");
5014 if (current_part_dimension
|| seen_part_dimension
)
5017 if (ref
->u
.c
.component
->attr
.pointer
5018 || ref
->u
.c
.component
->attr
.proc_pointer
5019 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5020 && CLASS_DATA (ref
->u
.c
.component
)->attr
.pointer
))
5022 gfc_error ("Component to the right of a part reference "
5023 "with nonzero rank must not have the POINTER "
5024 "attribute at %L", &expr
->where
);
5027 else if (ref
->u
.c
.component
->attr
.allocatable
5028 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5029 && CLASS_DATA (ref
->u
.c
.component
)->attr
.allocatable
))
5032 gfc_error ("Component to the right of a part reference "
5033 "with nonzero rank must not have the ALLOCATABLE "
5034 "attribute at %L", &expr
->where
);
5046 if (((ref
->type
== REF_COMPONENT
&& n_components
> 1)
5047 || ref
->next
== NULL
)
5048 && current_part_dimension
5049 && seen_part_dimension
)
5051 gfc_error ("Two or more part references with nonzero rank must "
5052 "not be specified at %L", &expr
->where
);
5056 if (ref
->type
== REF_COMPONENT
)
5058 if (current_part_dimension
)
5059 seen_part_dimension
= 1;
5061 /* reset to make sure */
5062 current_part_dimension
= 0;
5070 /* Given an expression, determine its shape. This is easier than it sounds.
5071 Leaves the shape array NULL if it is not possible to determine the shape. */
5074 expression_shape (gfc_expr
*e
)
5076 mpz_t array
[GFC_MAX_DIMENSIONS
];
5079 if (e
->rank
<= 0 || e
->shape
!= NULL
)
5082 for (i
= 0; i
< e
->rank
; i
++)
5083 if (!gfc_array_dimen_size (e
, i
, &array
[i
]))
5086 e
->shape
= gfc_get_shape (e
->rank
);
5088 memcpy (e
->shape
, array
, e
->rank
* sizeof (mpz_t
));
5093 for (i
--; i
>= 0; i
--)
5094 mpz_clear (array
[i
]);
5098 /* Given a variable expression node, compute the rank of the expression by
5099 examining the base symbol and any reference structures it may have. */
5102 expression_rank (gfc_expr
*e
)
5107 /* Just to make sure, because EXPR_COMPCALL's also have an e->ref and that
5108 could lead to serious confusion... */
5109 gcc_assert (e
->expr_type
!= EXPR_COMPCALL
);
5113 if (e
->expr_type
== EXPR_ARRAY
)
5115 /* Constructors can have a rank different from one via RESHAPE(). */
5117 if (e
->symtree
== NULL
)
5123 e
->rank
= (e
->symtree
->n
.sym
->as
== NULL
)
5124 ? 0 : e
->symtree
->n
.sym
->as
->rank
;
5130 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5132 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.proc_pointer
5133 && ref
->u
.c
.component
->attr
.function
&& !ref
->next
)
5134 rank
= ref
->u
.c
.component
->as
? ref
->u
.c
.component
->as
->rank
: 0;
5136 if (ref
->type
!= REF_ARRAY
)
5139 if (ref
->u
.ar
.type
== AR_FULL
)
5141 rank
= ref
->u
.ar
.as
->rank
;
5145 if (ref
->u
.ar
.type
== AR_SECTION
)
5147 /* Figure out the rank of the section. */
5149 gfc_internal_error ("expression_rank(): Two array specs");
5151 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
5152 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_RANGE
5153 || ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
)
5163 expression_shape (e
);
5168 add_caf_get_intrinsic (gfc_expr
*e
)
5170 gfc_expr
*wrapper
, *tmp_expr
;
5174 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5175 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5180 for (n
= ref
->u
.ar
.dimen
; n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
5181 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_ELEMENT
)
5184 tmp_expr
= XCNEW (gfc_expr
);
5186 wrapper
= gfc_build_intrinsic_call (gfc_current_ns
, GFC_ISYM_CAF_GET
,
5187 "caf_get", tmp_expr
->where
, 1, tmp_expr
);
5188 wrapper
->ts
= e
->ts
;
5189 wrapper
->rank
= e
->rank
;
5191 wrapper
->shape
= gfc_copy_shape (e
->shape
, e
->rank
);
5198 remove_caf_get_intrinsic (gfc_expr
*e
)
5200 gcc_assert (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
5201 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
);
5202 gfc_expr
*e2
= e
->value
.function
.actual
->expr
;
5203 e
->value
.function
.actual
->expr
= NULL
;
5204 gfc_free_actual_arglist (e
->value
.function
.actual
);
5205 gfc_free_shape (&e
->shape
, e
->rank
);
5211 /* Resolve a variable expression. */
5214 resolve_variable (gfc_expr
*e
)
5221 if (e
->symtree
== NULL
)
5223 sym
= e
->symtree
->n
.sym
;
5225 /* Use same check as for TYPE(*) below; this check has to be before TYPE(*)
5226 as ts.type is set to BT_ASSUMED in resolve_symbol. */
5227 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
5229 if (!actual_arg
|| inquiry_argument
)
5231 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may only "
5232 "be used as actual argument", sym
->name
, &e
->where
);
5236 /* TS 29113, 407b. */
5237 else if (e
->ts
.type
== BT_ASSUMED
)
5241 gfc_error ("Assumed-type variable %s at %L may only be used "
5242 "as actual argument", sym
->name
, &e
->where
);
5245 else if (inquiry_argument
&& !first_actual_arg
)
5247 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5248 for all inquiry functions in resolve_function; the reason is
5249 that the function-name resolution happens too late in that
5251 gfc_error ("Assumed-type variable %s at %L as actual argument to "
5252 "an inquiry function shall be the first argument",
5253 sym
->name
, &e
->where
);
5257 /* TS 29113, C535b. */
5258 else if ((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5259 && CLASS_DATA (sym
)->as
5260 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5261 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5262 && sym
->as
->type
== AS_ASSUMED_RANK
))
5266 gfc_error ("Assumed-rank variable %s at %L may only be used as "
5267 "actual argument", sym
->name
, &e
->where
);
5270 else if (inquiry_argument
&& !first_actual_arg
)
5272 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5273 for all inquiry functions in resolve_function; the reason is
5274 that the function-name resolution happens too late in that
5276 gfc_error ("Assumed-rank variable %s at %L as actual argument "
5277 "to an inquiry function shall be the first argument",
5278 sym
->name
, &e
->where
);
5283 if ((sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
)) && e
->ref
5284 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5285 && e
->ref
->next
== NULL
))
5287 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall not have "
5288 "a subobject reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5291 /* TS 29113, 407b. */
5292 else if (e
->ts
.type
== BT_ASSUMED
&& e
->ref
5293 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5294 && e
->ref
->next
== NULL
))
5296 gfc_error ("Assumed-type variable %s at %L shall not have a subobject "
5297 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5301 /* TS 29113, C535b. */
5302 if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5303 && CLASS_DATA (sym
)->as
5304 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5305 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5306 && sym
->as
->type
== AS_ASSUMED_RANK
))
5308 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5309 && e
->ref
->next
== NULL
))
5311 gfc_error ("Assumed-rank variable %s at %L shall not have a subobject "
5312 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5316 /* For variables that are used in an associate (target => object) where
5317 the object's basetype is array valued while the target is scalar,
5318 the ts' type of the component refs is still array valued, which
5319 can't be translated that way. */
5320 if (sym
->assoc
&& e
->rank
== 0 && e
->ref
&& sym
->ts
.type
== BT_CLASS
5321 && sym
->assoc
->target
->ts
.type
== BT_CLASS
5322 && CLASS_DATA (sym
->assoc
->target
)->as
)
5324 gfc_ref
*ref
= e
->ref
;
5330 ref
->u
.c
.sym
= sym
->ts
.u
.derived
;
5331 /* Stop the loop. */
5341 /* If this is an associate-name, it may be parsed with an array reference
5342 in error even though the target is scalar. Fail directly in this case.
5343 TODO Understand why class scalar expressions must be excluded. */
5344 if (sym
->assoc
&& !(sym
->ts
.type
== BT_CLASS
&& e
->rank
== 0))
5346 if (sym
->ts
.type
== BT_CLASS
)
5347 gfc_fix_class_refs (e
);
5348 if (!sym
->attr
.dimension
&& e
->ref
&& e
->ref
->type
== REF_ARRAY
)
5352 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.generic
)
5353 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
5355 /* On the other hand, the parser may not have known this is an array;
5356 in this case, we have to add a FULL reference. */
5357 if (sym
->assoc
&& sym
->attr
.dimension
&& !e
->ref
)
5359 e
->ref
= gfc_get_ref ();
5360 e
->ref
->type
= REF_ARRAY
;
5361 e
->ref
->u
.ar
.type
= AR_FULL
;
5362 e
->ref
->u
.ar
.dimen
= 0;
5365 /* Like above, but for class types, where the checking whether an array
5366 ref is present is more complicated. Furthermore make sure not to add
5367 the full array ref to _vptr or _len refs. */
5368 if (sym
->assoc
&& sym
->ts
.type
== BT_CLASS
5369 && CLASS_DATA (sym
)->attr
.dimension
5370 && (e
->ts
.type
!= BT_DERIVED
|| !e
->ts
.u
.derived
->attr
.vtype
))
5372 gfc_ref
*ref
, *newref
;
5374 newref
= gfc_get_ref ();
5375 newref
->type
= REF_ARRAY
;
5376 newref
->u
.ar
.type
= AR_FULL
;
5377 newref
->u
.ar
.dimen
= 0;
5378 /* Because this is an associate var and the first ref either is a ref to
5379 the _data component or not, no traversal of the ref chain is
5380 needed. The array ref needs to be inserted after the _data ref,
5381 or when that is not present, which may happend for polymorphic
5382 types, then at the first position. */
5386 else if (ref
->type
== REF_COMPONENT
5387 && strcmp ("_data", ref
->u
.c
.component
->name
) == 0)
5389 if (!ref
->next
|| ref
->next
->type
!= REF_ARRAY
)
5391 newref
->next
= ref
->next
;
5395 /* Array ref present already. */
5396 gfc_free_ref_list (newref
);
5398 else if (ref
->type
== REF_ARRAY
)
5399 /* Array ref present already. */
5400 gfc_free_ref_list (newref
);
5408 if (e
->ref
&& !resolve_ref (e
))
5411 if (sym
->attr
.flavor
== FL_PROCEDURE
5412 && (!sym
->attr
.function
5413 || (sym
->attr
.function
&& sym
->result
5414 && sym
->result
->attr
.proc_pointer
5415 && !sym
->result
->attr
.function
)))
5417 e
->ts
.type
= BT_PROCEDURE
;
5418 goto resolve_procedure
;
5421 if (sym
->ts
.type
!= BT_UNKNOWN
)
5422 gfc_variable_attr (e
, &e
->ts
);
5423 else if (sym
->attr
.flavor
== FL_PROCEDURE
5424 && sym
->attr
.function
&& sym
->result
5425 && sym
->result
->ts
.type
!= BT_UNKNOWN
5426 && sym
->result
->attr
.proc_pointer
)
5427 e
->ts
= sym
->result
->ts
;
5430 /* Must be a simple variable reference. */
5431 if (!gfc_set_default_type (sym
, 1, sym
->ns
))
5436 if (check_assumed_size_reference (sym
, e
))
5439 /* Deal with forward references to entries during gfc_resolve_code, to
5440 satisfy, at least partially, 12.5.2.5. */
5441 if (gfc_current_ns
->entries
5442 && current_entry_id
== sym
->entry_id
5445 && cs_base
->current
->op
!= EXEC_ENTRY
)
5447 gfc_entry_list
*entry
;
5448 gfc_formal_arglist
*formal
;
5450 bool seen
, saved_specification_expr
;
5452 /* If the symbol is a dummy... */
5453 if (sym
->attr
.dummy
&& sym
->ns
== gfc_current_ns
)
5455 entry
= gfc_current_ns
->entries
;
5458 /* ...test if the symbol is a parameter of previous entries. */
5459 for (; entry
&& entry
->id
<= current_entry_id
; entry
= entry
->next
)
5460 for (formal
= entry
->sym
->formal
; formal
; formal
= formal
->next
)
5462 if (formal
->sym
&& sym
->name
== formal
->sym
->name
)
5469 /* If it has not been seen as a dummy, this is an error. */
5472 if (specification_expr
)
5473 gfc_error ("Variable %qs, used in a specification expression"
5474 ", is referenced at %L before the ENTRY statement "
5475 "in which it is a parameter",
5476 sym
->name
, &cs_base
->current
->loc
);
5478 gfc_error ("Variable %qs is used at %L before the ENTRY "
5479 "statement in which it is a parameter",
5480 sym
->name
, &cs_base
->current
->loc
);
5485 /* Now do the same check on the specification expressions. */
5486 saved_specification_expr
= specification_expr
;
5487 specification_expr
= true;
5488 if (sym
->ts
.type
== BT_CHARACTER
5489 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
5493 for (n
= 0; n
< sym
->as
->rank
; n
++)
5495 if (!gfc_resolve_expr (sym
->as
->lower
[n
]))
5497 if (!gfc_resolve_expr (sym
->as
->upper
[n
]))
5500 specification_expr
= saved_specification_expr
;
5503 /* Update the symbol's entry level. */
5504 sym
->entry_id
= current_entry_id
+ 1;
5507 /* If a symbol has been host_associated mark it. This is used latter,
5508 to identify if aliasing is possible via host association. */
5509 if (sym
->attr
.flavor
== FL_VARIABLE
5510 && gfc_current_ns
->parent
5511 && (gfc_current_ns
->parent
== sym
->ns
5512 || (gfc_current_ns
->parent
->parent
5513 && gfc_current_ns
->parent
->parent
== sym
->ns
)))
5514 sym
->attr
.host_assoc
= 1;
5516 if (gfc_current_ns
->proc_name
5517 && sym
->attr
.dimension
5518 && (sym
->ns
!= gfc_current_ns
5519 || sym
->attr
.use_assoc
5520 || sym
->attr
.in_common
))
5521 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
5524 if (t
&& !resolve_procedure_expression (e
))
5527 /* F2008, C617 and C1229. */
5528 if (!inquiry_argument
&& (e
->ts
.type
== BT_CLASS
|| e
->ts
.type
== BT_DERIVED
)
5529 && gfc_is_coindexed (e
))
5531 gfc_ref
*ref
, *ref2
= NULL
;
5533 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5535 if (ref
->type
== REF_COMPONENT
)
5537 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5541 for ( ; ref
; ref
= ref
->next
)
5542 if (ref
->type
== REF_COMPONENT
)
5545 /* Expression itself is not coindexed object. */
5546 if (ref
&& e
->ts
.type
== BT_CLASS
)
5548 gfc_error ("Polymorphic subobject of coindexed object at %L",
5553 /* Expression itself is coindexed object. */
5557 c
= ref2
? ref2
->u
.c
.component
: e
->symtree
->n
.sym
->components
;
5558 for ( ; c
; c
= c
->next
)
5559 if (c
->attr
.allocatable
&& c
->ts
.type
== BT_CLASS
)
5561 gfc_error ("Coindexed object with polymorphic allocatable "
5562 "subcomponent at %L", &e
->where
);
5570 expression_rank (e
);
5572 if (t
&& flag_coarray
== GFC_FCOARRAY_LIB
&& gfc_is_coindexed (e
))
5573 add_caf_get_intrinsic (e
);
5579 /* Checks to see that the correct symbol has been host associated.
5580 The only situation where this arises is that in which a twice
5581 contained function is parsed after the host association is made.
5582 Therefore, on detecting this, change the symbol in the expression
5583 and convert the array reference into an actual arglist if the old
5584 symbol is a variable. */
5586 check_host_association (gfc_expr
*e
)
5588 gfc_symbol
*sym
, *old_sym
;
5592 gfc_actual_arglist
*arg
, *tail
= NULL
;
5593 bool retval
= e
->expr_type
== EXPR_FUNCTION
;
5595 /* If the expression is the result of substitution in
5596 interface.c(gfc_extend_expr) because there is no way in
5597 which the host association can be wrong. */
5598 if (e
->symtree
== NULL
5599 || e
->symtree
->n
.sym
== NULL
5600 || e
->user_operator
)
5603 old_sym
= e
->symtree
->n
.sym
;
5605 if (gfc_current_ns
->parent
5606 && old_sym
->ns
!= gfc_current_ns
)
5608 /* Use the 'USE' name so that renamed module symbols are
5609 correctly handled. */
5610 gfc_find_symbol (e
->symtree
->name
, gfc_current_ns
, 1, &sym
);
5612 if (sym
&& old_sym
!= sym
5613 && sym
->ts
.type
== old_sym
->ts
.type
5614 && sym
->attr
.flavor
== FL_PROCEDURE
5615 && sym
->attr
.contained
)
5617 /* Clear the shape, since it might not be valid. */
5618 gfc_free_shape (&e
->shape
, e
->rank
);
5620 /* Give the expression the right symtree! */
5621 gfc_find_sym_tree (e
->symtree
->name
, NULL
, 1, &st
);
5622 gcc_assert (st
!= NULL
);
5624 if (old_sym
->attr
.flavor
== FL_PROCEDURE
5625 || e
->expr_type
== EXPR_FUNCTION
)
5627 /* Original was function so point to the new symbol, since
5628 the actual argument list is already attached to the
5630 e
->value
.function
.esym
= NULL
;
5635 /* Original was variable so convert array references into
5636 an actual arglist. This does not need any checking now
5637 since resolve_function will take care of it. */
5638 e
->value
.function
.actual
= NULL
;
5639 e
->expr_type
= EXPR_FUNCTION
;
5642 /* Ambiguity will not arise if the array reference is not
5643 the last reference. */
5644 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5645 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
5648 gcc_assert (ref
->type
== REF_ARRAY
);
5650 /* Grab the start expressions from the array ref and
5651 copy them into actual arguments. */
5652 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
5654 arg
= gfc_get_actual_arglist ();
5655 arg
->expr
= gfc_copy_expr (ref
->u
.ar
.start
[n
]);
5656 if (e
->value
.function
.actual
== NULL
)
5657 tail
= e
->value
.function
.actual
= arg
;
5665 /* Dump the reference list and set the rank. */
5666 gfc_free_ref_list (e
->ref
);
5668 e
->rank
= sym
->as
? sym
->as
->rank
: 0;
5671 gfc_resolve_expr (e
);
5675 /* This might have changed! */
5676 return e
->expr_type
== EXPR_FUNCTION
;
5681 gfc_resolve_character_operator (gfc_expr
*e
)
5683 gfc_expr
*op1
= e
->value
.op
.op1
;
5684 gfc_expr
*op2
= e
->value
.op
.op2
;
5685 gfc_expr
*e1
= NULL
;
5686 gfc_expr
*e2
= NULL
;
5688 gcc_assert (e
->value
.op
.op
== INTRINSIC_CONCAT
);
5690 if (op1
->ts
.u
.cl
&& op1
->ts
.u
.cl
->length
)
5691 e1
= gfc_copy_expr (op1
->ts
.u
.cl
->length
);
5692 else if (op1
->expr_type
== EXPR_CONSTANT
)
5693 e1
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5694 op1
->value
.character
.length
);
5696 if (op2
->ts
.u
.cl
&& op2
->ts
.u
.cl
->length
)
5697 e2
= gfc_copy_expr (op2
->ts
.u
.cl
->length
);
5698 else if (op2
->expr_type
== EXPR_CONSTANT
)
5699 e2
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5700 op2
->value
.character
.length
);
5702 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5712 e
->ts
.u
.cl
->length
= gfc_add (e1
, e2
);
5713 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5714 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5715 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 0);
5716 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5722 /* Ensure that an character expression has a charlen and, if possible, a
5723 length expression. */
5726 fixup_charlen (gfc_expr
*e
)
5728 /* The cases fall through so that changes in expression type and the need
5729 for multiple fixes are picked up. In all circumstances, a charlen should
5730 be available for the middle end to hang a backend_decl on. */
5731 switch (e
->expr_type
)
5734 gfc_resolve_character_operator (e
);
5738 if (e
->expr_type
== EXPR_ARRAY
)
5739 gfc_resolve_character_array_constructor (e
);
5742 case EXPR_SUBSTRING
:
5743 if (!e
->ts
.u
.cl
&& e
->ref
)
5744 gfc_resolve_substring_charlen (e
);
5749 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5756 /* Update an actual argument to include the passed-object for type-bound
5757 procedures at the right position. */
5759 static gfc_actual_arglist
*
5760 update_arglist_pass (gfc_actual_arglist
* lst
, gfc_expr
* po
, unsigned argpos
,
5763 gcc_assert (argpos
> 0);
5767 gfc_actual_arglist
* result
;
5769 result
= gfc_get_actual_arglist ();
5773 result
->name
= name
;
5779 lst
->next
= update_arglist_pass (lst
->next
, po
, argpos
- 1, name
);
5781 lst
= update_arglist_pass (NULL
, po
, argpos
- 1, name
);
5786 /* Extract the passed-object from an EXPR_COMPCALL (a copy of it). */
5789 extract_compcall_passed_object (gfc_expr
* e
)
5793 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
5795 if (e
->value
.compcall
.base_object
)
5796 po
= gfc_copy_expr (e
->value
.compcall
.base_object
);
5799 po
= gfc_get_expr ();
5800 po
->expr_type
= EXPR_VARIABLE
;
5801 po
->symtree
= e
->symtree
;
5802 po
->ref
= gfc_copy_ref (e
->ref
);
5803 po
->where
= e
->where
;
5806 if (!gfc_resolve_expr (po
))
5813 /* Update the arglist of an EXPR_COMPCALL expression to include the
5817 update_compcall_arglist (gfc_expr
* e
)
5820 gfc_typebound_proc
* tbp
;
5822 tbp
= e
->value
.compcall
.tbp
;
5827 po
= extract_compcall_passed_object (e
);
5831 if (tbp
->nopass
|| e
->value
.compcall
.ignore_pass
)
5837 if (tbp
->pass_arg_num
<= 0)
5840 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
5848 /* Extract the passed object from a PPC call (a copy of it). */
5851 extract_ppc_passed_object (gfc_expr
*e
)
5856 po
= gfc_get_expr ();
5857 po
->expr_type
= EXPR_VARIABLE
;
5858 po
->symtree
= e
->symtree
;
5859 po
->ref
= gfc_copy_ref (e
->ref
);
5860 po
->where
= e
->where
;
5862 /* Remove PPC reference. */
5864 while ((*ref
)->next
)
5865 ref
= &(*ref
)->next
;
5866 gfc_free_ref_list (*ref
);
5869 if (!gfc_resolve_expr (po
))
5876 /* Update the actual arglist of a procedure pointer component to include the
5880 update_ppc_arglist (gfc_expr
* e
)
5884 gfc_typebound_proc
* tb
;
5886 ppc
= gfc_get_proc_ptr_comp (e
);
5894 else if (tb
->nopass
)
5897 po
= extract_ppc_passed_object (e
);
5904 gfc_error ("Passed-object at %L must be scalar", &e
->where
);
5909 if (po
->ts
.type
== BT_DERIVED
&& po
->ts
.u
.derived
->attr
.abstract
)
5911 gfc_error ("Base object for procedure-pointer component call at %L is of"
5912 " ABSTRACT type %qs", &e
->where
, po
->ts
.u
.derived
->name
);
5916 gcc_assert (tb
->pass_arg_num
> 0);
5917 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
5925 /* Check that the object a TBP is called on is valid, i.e. it must not be
5926 of ABSTRACT type (as in subobject%abstract_parent%tbp()). */
5929 check_typebound_baseobject (gfc_expr
* e
)
5932 bool return_value
= false;
5934 base
= extract_compcall_passed_object (e
);
5938 gcc_assert (base
->ts
.type
== BT_DERIVED
|| base
->ts
.type
== BT_CLASS
);
5940 if (base
->ts
.type
== BT_CLASS
&& !gfc_expr_attr (base
).class_ok
)
5944 if (base
->ts
.type
== BT_DERIVED
&& base
->ts
.u
.derived
->attr
.abstract
)
5946 gfc_error ("Base object for type-bound procedure call at %L is of"
5947 " ABSTRACT type %qs", &e
->where
, base
->ts
.u
.derived
->name
);
5951 /* F08:C1230. If the procedure called is NOPASS,
5952 the base object must be scalar. */
5953 if (e
->value
.compcall
.tbp
->nopass
&& base
->rank
!= 0)
5955 gfc_error ("Base object for NOPASS type-bound procedure call at %L must"
5956 " be scalar", &e
->where
);
5960 return_value
= true;
5963 gfc_free_expr (base
);
5964 return return_value
;
5968 /* Resolve a call to a type-bound procedure, either function or subroutine,
5969 statically from the data in an EXPR_COMPCALL expression. The adapted
5970 arglist and the target-procedure symtree are returned. */
5973 resolve_typebound_static (gfc_expr
* e
, gfc_symtree
** target
,
5974 gfc_actual_arglist
** actual
)
5976 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
5977 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
5979 /* Update the actual arglist for PASS. */
5980 if (!update_compcall_arglist (e
))
5983 *actual
= e
->value
.compcall
.actual
;
5984 *target
= e
->value
.compcall
.tbp
->u
.specific
;
5986 gfc_free_ref_list (e
->ref
);
5988 e
->value
.compcall
.actual
= NULL
;
5990 /* If we find a deferred typebound procedure, check for derived types
5991 that an overriding typebound procedure has not been missed. */
5992 if (e
->value
.compcall
.name
5993 && !e
->value
.compcall
.tbp
->non_overridable
5994 && e
->value
.compcall
.base_object
5995 && e
->value
.compcall
.base_object
->ts
.type
== BT_DERIVED
)
5998 gfc_symbol
*derived
;
6000 /* Use the derived type of the base_object. */
6001 derived
= e
->value
.compcall
.base_object
->ts
.u
.derived
;
6004 /* If necessary, go through the inheritance chain. */
6005 while (!st
&& derived
)
6007 /* Look for the typebound procedure 'name'. */
6008 if (derived
->f2k_derived
&& derived
->f2k_derived
->tb_sym_root
)
6009 st
= gfc_find_symtree (derived
->f2k_derived
->tb_sym_root
,
6010 e
->value
.compcall
.name
);
6012 derived
= gfc_get_derived_super_type (derived
);
6015 /* Now find the specific name in the derived type namespace. */
6016 if (st
&& st
->n
.tb
&& st
->n
.tb
->u
.specific
)
6017 gfc_find_sym_tree (st
->n
.tb
->u
.specific
->name
,
6018 derived
->ns
, 1, &st
);
6026 /* Get the ultimate declared type from an expression. In addition,
6027 return the last class/derived type reference and the copy of the
6028 reference list. If check_types is set true, derived types are
6029 identified as well as class references. */
6031 get_declared_from_expr (gfc_ref
**class_ref
, gfc_ref
**new_ref
,
6032 gfc_expr
*e
, bool check_types
)
6034 gfc_symbol
*declared
;
6041 *new_ref
= gfc_copy_ref (e
->ref
);
6043 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
6045 if (ref
->type
!= REF_COMPONENT
)
6048 if ((ref
->u
.c
.component
->ts
.type
== BT_CLASS
6049 || (check_types
&& gfc_bt_struct (ref
->u
.c
.component
->ts
.type
)))
6050 && ref
->u
.c
.component
->attr
.flavor
!= FL_PROCEDURE
)
6052 declared
= ref
->u
.c
.component
->ts
.u
.derived
;
6058 if (declared
== NULL
)
6059 declared
= e
->symtree
->n
.sym
->ts
.u
.derived
;
6065 /* Given an EXPR_COMPCALL calling a GENERIC typebound procedure, figure out
6066 which of the specific bindings (if any) matches the arglist and transform
6067 the expression into a call of that binding. */
6070 resolve_typebound_generic_call (gfc_expr
* e
, const char **name
)
6072 gfc_typebound_proc
* genproc
;
6073 const char* genname
;
6075 gfc_symbol
*derived
;
6077 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6078 genname
= e
->value
.compcall
.name
;
6079 genproc
= e
->value
.compcall
.tbp
;
6081 if (!genproc
->is_generic
)
6084 /* Try the bindings on this type and in the inheritance hierarchy. */
6085 for (; genproc
; genproc
= genproc
->overridden
)
6089 gcc_assert (genproc
->is_generic
);
6090 for (g
= genproc
->u
.generic
; g
; g
= g
->next
)
6093 gfc_actual_arglist
* args
;
6096 gcc_assert (g
->specific
);
6098 if (g
->specific
->error
)
6101 target
= g
->specific
->u
.specific
->n
.sym
;
6103 /* Get the right arglist by handling PASS/NOPASS. */
6104 args
= gfc_copy_actual_arglist (e
->value
.compcall
.actual
);
6105 if (!g
->specific
->nopass
)
6108 po
= extract_compcall_passed_object (e
);
6111 gfc_free_actual_arglist (args
);
6115 gcc_assert (g
->specific
->pass_arg_num
> 0);
6116 gcc_assert (!g
->specific
->error
);
6117 args
= update_arglist_pass (args
, po
, g
->specific
->pass_arg_num
,
6118 g
->specific
->pass_arg
);
6120 resolve_actual_arglist (args
, target
->attr
.proc
,
6121 is_external_proc (target
)
6122 && gfc_sym_get_dummy_args (target
) == NULL
);
6124 /* Check if this arglist matches the formal. */
6125 matches
= gfc_arglist_matches_symbol (&args
, target
);
6127 /* Clean up and break out of the loop if we've found it. */
6128 gfc_free_actual_arglist (args
);
6131 e
->value
.compcall
.tbp
= g
->specific
;
6132 genname
= g
->specific_st
->name
;
6133 /* Pass along the name for CLASS methods, where the vtab
6134 procedure pointer component has to be referenced. */
6142 /* Nothing matching found! */
6143 gfc_error ("Found no matching specific binding for the call to the GENERIC"
6144 " %qs at %L", genname
, &e
->where
);
6148 /* Make sure that we have the right specific instance for the name. */
6149 derived
= get_declared_from_expr (NULL
, NULL
, e
, true);
6151 st
= gfc_find_typebound_proc (derived
, NULL
, genname
, true, &e
->where
);
6153 e
->value
.compcall
.tbp
= st
->n
.tb
;
6159 /* Resolve a call to a type-bound subroutine. */
6162 resolve_typebound_call (gfc_code
* c
, const char **name
, bool *overridable
)
6164 gfc_actual_arglist
* newactual
;
6165 gfc_symtree
* target
;
6167 /* Check that's really a SUBROUTINE. */
6168 if (!c
->expr1
->value
.compcall
.tbp
->subroutine
)
6170 gfc_error ("%qs at %L should be a SUBROUTINE",
6171 c
->expr1
->value
.compcall
.name
, &c
->loc
);
6175 if (!check_typebound_baseobject (c
->expr1
))
6178 /* Pass along the name for CLASS methods, where the vtab
6179 procedure pointer component has to be referenced. */
6181 *name
= c
->expr1
->value
.compcall
.name
;
6183 if (!resolve_typebound_generic_call (c
->expr1
, name
))
6186 /* Pass along the NON_OVERRIDABLE attribute of the specific TBP. */
6188 *overridable
= !c
->expr1
->value
.compcall
.tbp
->non_overridable
;
6190 /* Transform into an ordinary EXEC_CALL for now. */
6192 if (!resolve_typebound_static (c
->expr1
, &target
, &newactual
))
6195 c
->ext
.actual
= newactual
;
6196 c
->symtree
= target
;
6197 c
->op
= (c
->expr1
->value
.compcall
.assign
? EXEC_ASSIGN_CALL
: EXEC_CALL
);
6199 gcc_assert (!c
->expr1
->ref
&& !c
->expr1
->value
.compcall
.actual
);
6201 gfc_free_expr (c
->expr1
);
6202 c
->expr1
= gfc_get_expr ();
6203 c
->expr1
->expr_type
= EXPR_FUNCTION
;
6204 c
->expr1
->symtree
= target
;
6205 c
->expr1
->where
= c
->loc
;
6207 return resolve_call (c
);
6211 /* Resolve a component-call expression. */
6213 resolve_compcall (gfc_expr
* e
, const char **name
)
6215 gfc_actual_arglist
* newactual
;
6216 gfc_symtree
* target
;
6218 /* Check that's really a FUNCTION. */
6219 if (!e
->value
.compcall
.tbp
->function
)
6221 gfc_error ("%qs at %L should be a FUNCTION",
6222 e
->value
.compcall
.name
, &e
->where
);
6226 /* These must not be assign-calls! */
6227 gcc_assert (!e
->value
.compcall
.assign
);
6229 if (!check_typebound_baseobject (e
))
6232 /* Pass along the name for CLASS methods, where the vtab
6233 procedure pointer component has to be referenced. */
6235 *name
= e
->value
.compcall
.name
;
6237 if (!resolve_typebound_generic_call (e
, name
))
6239 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6241 /* Take the rank from the function's symbol. */
6242 if (e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
)
6243 e
->rank
= e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
->rank
;
6245 /* For now, we simply transform it into an EXPR_FUNCTION call with the same
6246 arglist to the TBP's binding target. */
6248 if (!resolve_typebound_static (e
, &target
, &newactual
))
6251 e
->value
.function
.actual
= newactual
;
6252 e
->value
.function
.name
= NULL
;
6253 e
->value
.function
.esym
= target
->n
.sym
;
6254 e
->value
.function
.isym
= NULL
;
6255 e
->symtree
= target
;
6256 e
->ts
= target
->n
.sym
->ts
;
6257 e
->expr_type
= EXPR_FUNCTION
;
6259 /* Resolution is not necessary if this is a class subroutine; this
6260 function only has to identify the specific proc. Resolution of
6261 the call will be done next in resolve_typebound_call. */
6262 return gfc_resolve_expr (e
);
6266 static bool resolve_fl_derived (gfc_symbol
*sym
);
6269 /* Resolve a typebound function, or 'method'. First separate all
6270 the non-CLASS references by calling resolve_compcall directly. */
6273 resolve_typebound_function (gfc_expr
* e
)
6275 gfc_symbol
*declared
;
6287 /* Deal with typebound operators for CLASS objects. */
6288 expr
= e
->value
.compcall
.base_object
;
6289 overridable
= !e
->value
.compcall
.tbp
->non_overridable
;
6290 if (expr
&& expr
->ts
.type
== BT_CLASS
&& e
->value
.compcall
.name
)
6292 /* If the base_object is not a variable, the corresponding actual
6293 argument expression must be stored in e->base_expression so
6294 that the corresponding tree temporary can be used as the base
6295 object in gfc_conv_procedure_call. */
6296 if (expr
->expr_type
!= EXPR_VARIABLE
)
6298 gfc_actual_arglist
*args
;
6300 for (args
= e
->value
.function
.actual
; args
; args
= args
->next
)
6302 if (expr
== args
->expr
)
6307 /* Since the typebound operators are generic, we have to ensure
6308 that any delays in resolution are corrected and that the vtab
6311 declared
= ts
.u
.derived
;
6312 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6313 if (c
->ts
.u
.derived
== NULL
)
6314 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6316 if (!resolve_compcall (e
, &name
))
6319 /* Use the generic name if it is there. */
6320 name
= name
? name
: e
->value
.function
.esym
->name
;
6321 e
->symtree
= expr
->symtree
;
6322 e
->ref
= gfc_copy_ref (expr
->ref
);
6323 get_declared_from_expr (&class_ref
, NULL
, e
, false);
6325 /* Trim away the extraneous references that emerge from nested
6326 use of interface.c (extend_expr). */
6327 if (class_ref
&& class_ref
->next
)
6329 gfc_free_ref_list (class_ref
->next
);
6330 class_ref
->next
= NULL
;
6332 else if (e
->ref
&& !class_ref
&& expr
->ts
.type
!= BT_CLASS
)
6334 gfc_free_ref_list (e
->ref
);
6338 gfc_add_vptr_component (e
);
6339 gfc_add_component_ref (e
, name
);
6340 e
->value
.function
.esym
= NULL
;
6341 if (expr
->expr_type
!= EXPR_VARIABLE
)
6342 e
->base_expr
= expr
;
6347 return resolve_compcall (e
, NULL
);
6349 if (!resolve_ref (e
))
6352 /* Get the CLASS declared type. */
6353 declared
= get_declared_from_expr (&class_ref
, &new_ref
, e
, true);
6355 if (!resolve_fl_derived (declared
))
6358 /* Weed out cases of the ultimate component being a derived type. */
6359 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6360 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6362 gfc_free_ref_list (new_ref
);
6363 return resolve_compcall (e
, NULL
);
6366 c
= gfc_find_component (declared
, "_data", true, true, NULL
);
6367 declared
= c
->ts
.u
.derived
;
6369 /* Treat the call as if it is a typebound procedure, in order to roll
6370 out the correct name for the specific function. */
6371 if (!resolve_compcall (e
, &name
))
6373 gfc_free_ref_list (new_ref
);
6380 /* Convert the expression to a procedure pointer component call. */
6381 e
->value
.function
.esym
= NULL
;
6387 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6388 gfc_add_vptr_component (e
);
6389 gfc_add_component_ref (e
, name
);
6391 /* Recover the typespec for the expression. This is really only
6392 necessary for generic procedures, where the additional call
6393 to gfc_add_component_ref seems to throw the collection of the
6394 correct typespec. */
6398 gfc_free_ref_list (new_ref
);
6403 /* Resolve a typebound subroutine, or 'method'. First separate all
6404 the non-CLASS references by calling resolve_typebound_call
6408 resolve_typebound_subroutine (gfc_code
*code
)
6410 gfc_symbol
*declared
;
6420 st
= code
->expr1
->symtree
;
6422 /* Deal with typebound operators for CLASS objects. */
6423 expr
= code
->expr1
->value
.compcall
.base_object
;
6424 overridable
= !code
->expr1
->value
.compcall
.tbp
->non_overridable
;
6425 if (expr
&& expr
->ts
.type
== BT_CLASS
&& code
->expr1
->value
.compcall
.name
)
6427 /* If the base_object is not a variable, the corresponding actual
6428 argument expression must be stored in e->base_expression so
6429 that the corresponding tree temporary can be used as the base
6430 object in gfc_conv_procedure_call. */
6431 if (expr
->expr_type
!= EXPR_VARIABLE
)
6433 gfc_actual_arglist
*args
;
6435 args
= code
->expr1
->value
.function
.actual
;
6436 for (; args
; args
= args
->next
)
6437 if (expr
== args
->expr
)
6441 /* Since the typebound operators are generic, we have to ensure
6442 that any delays in resolution are corrected and that the vtab
6444 declared
= expr
->ts
.u
.derived
;
6445 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6446 if (c
->ts
.u
.derived
== NULL
)
6447 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6449 if (!resolve_typebound_call (code
, &name
, NULL
))
6452 /* Use the generic name if it is there. */
6453 name
= name
? name
: code
->expr1
->value
.function
.esym
->name
;
6454 code
->expr1
->symtree
= expr
->symtree
;
6455 code
->expr1
->ref
= gfc_copy_ref (expr
->ref
);
6457 /* Trim away the extraneous references that emerge from nested
6458 use of interface.c (extend_expr). */
6459 get_declared_from_expr (&class_ref
, NULL
, code
->expr1
, false);
6460 if (class_ref
&& class_ref
->next
)
6462 gfc_free_ref_list (class_ref
->next
);
6463 class_ref
->next
= NULL
;
6465 else if (code
->expr1
->ref
&& !class_ref
)
6467 gfc_free_ref_list (code
->expr1
->ref
);
6468 code
->expr1
->ref
= NULL
;
6471 /* Now use the procedure in the vtable. */
6472 gfc_add_vptr_component (code
->expr1
);
6473 gfc_add_component_ref (code
->expr1
, name
);
6474 code
->expr1
->value
.function
.esym
= NULL
;
6475 if (expr
->expr_type
!= EXPR_VARIABLE
)
6476 code
->expr1
->base_expr
= expr
;
6481 return resolve_typebound_call (code
, NULL
, NULL
);
6483 if (!resolve_ref (code
->expr1
))
6486 /* Get the CLASS declared type. */
6487 get_declared_from_expr (&class_ref
, &new_ref
, code
->expr1
, true);
6489 /* Weed out cases of the ultimate component being a derived type. */
6490 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6491 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6493 gfc_free_ref_list (new_ref
);
6494 return resolve_typebound_call (code
, NULL
, NULL
);
6497 if (!resolve_typebound_call (code
, &name
, &overridable
))
6499 gfc_free_ref_list (new_ref
);
6502 ts
= code
->expr1
->ts
;
6506 /* Convert the expression to a procedure pointer component call. */
6507 code
->expr1
->value
.function
.esym
= NULL
;
6508 code
->expr1
->symtree
= st
;
6511 code
->expr1
->ref
= new_ref
;
6513 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6514 gfc_add_vptr_component (code
->expr1
);
6515 gfc_add_component_ref (code
->expr1
, name
);
6517 /* Recover the typespec for the expression. This is really only
6518 necessary for generic procedures, where the additional call
6519 to gfc_add_component_ref seems to throw the collection of the
6520 correct typespec. */
6521 code
->expr1
->ts
= ts
;
6524 gfc_free_ref_list (new_ref
);
6530 /* Resolve a CALL to a Procedure Pointer Component (Subroutine). */
6533 resolve_ppc_call (gfc_code
* c
)
6535 gfc_component
*comp
;
6537 comp
= gfc_get_proc_ptr_comp (c
->expr1
);
6538 gcc_assert (comp
!= NULL
);
6540 c
->resolved_sym
= c
->expr1
->symtree
->n
.sym
;
6541 c
->expr1
->expr_type
= EXPR_VARIABLE
;
6543 if (!comp
->attr
.subroutine
)
6544 gfc_add_subroutine (&comp
->attr
, comp
->name
, &c
->expr1
->where
);
6546 if (!resolve_ref (c
->expr1
))
6549 if (!update_ppc_arglist (c
->expr1
))
6552 c
->ext
.actual
= c
->expr1
->value
.compcall
.actual
;
6554 if (!resolve_actual_arglist (c
->ext
.actual
, comp
->attr
.proc
,
6555 !(comp
->ts
.interface
6556 && comp
->ts
.interface
->formal
)))
6559 if (!pure_subroutine (comp
->ts
.interface
, comp
->name
, &c
->expr1
->where
))
6562 gfc_ppc_use (comp
, &c
->expr1
->value
.compcall
.actual
, &c
->expr1
->where
);
6568 /* Resolve a Function Call to a Procedure Pointer Component (Function). */
6571 resolve_expr_ppc (gfc_expr
* e
)
6573 gfc_component
*comp
;
6575 comp
= gfc_get_proc_ptr_comp (e
);
6576 gcc_assert (comp
!= NULL
);
6578 /* Convert to EXPR_FUNCTION. */
6579 e
->expr_type
= EXPR_FUNCTION
;
6580 e
->value
.function
.isym
= NULL
;
6581 e
->value
.function
.actual
= e
->value
.compcall
.actual
;
6583 if (comp
->as
!= NULL
)
6584 e
->rank
= comp
->as
->rank
;
6586 if (!comp
->attr
.function
)
6587 gfc_add_function (&comp
->attr
, comp
->name
, &e
->where
);
6589 if (!resolve_ref (e
))
6592 if (!resolve_actual_arglist (e
->value
.function
.actual
, comp
->attr
.proc
,
6593 !(comp
->ts
.interface
6594 && comp
->ts
.interface
->formal
)))
6597 if (!update_ppc_arglist (e
))
6600 if (!check_pure_function(e
))
6603 gfc_ppc_use (comp
, &e
->value
.compcall
.actual
, &e
->where
);
6610 gfc_is_expandable_expr (gfc_expr
*e
)
6612 gfc_constructor
*con
;
6614 if (e
->expr_type
== EXPR_ARRAY
)
6616 /* Traverse the constructor looking for variables that are flavor
6617 parameter. Parameters must be expanded since they are fully used at
6619 con
= gfc_constructor_first (e
->value
.constructor
);
6620 for (; con
; con
= gfc_constructor_next (con
))
6622 if (con
->expr
->expr_type
== EXPR_VARIABLE
6623 && con
->expr
->symtree
6624 && (con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
6625 || con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_VARIABLE
))
6627 if (con
->expr
->expr_type
== EXPR_ARRAY
6628 && gfc_is_expandable_expr (con
->expr
))
6637 /* Sometimes variables in specification expressions of the result
6638 of module procedures in submodules wind up not being the 'real'
6639 dummy. Find this, if possible, in the namespace of the first
6643 fixup_unique_dummy (gfc_expr
*e
)
6645 gfc_symtree
*st
= NULL
;
6646 gfc_symbol
*s
= NULL
;
6648 if (e
->symtree
->n
.sym
->ns
->proc_name
6649 && e
->symtree
->n
.sym
->ns
->proc_name
->formal
)
6650 s
= e
->symtree
->n
.sym
->ns
->proc_name
->formal
->sym
;
6653 st
= gfc_find_symtree (s
->ns
->sym_root
, e
->symtree
->n
.sym
->name
);
6656 && st
->n
.sym
!= NULL
6657 && st
->n
.sym
->attr
.dummy
)
6661 /* Resolve an expression. That is, make sure that types of operands agree
6662 with their operators, intrinsic operators are converted to function calls
6663 for overloaded types and unresolved function references are resolved. */
6666 gfc_resolve_expr (gfc_expr
*e
)
6669 bool inquiry_save
, actual_arg_save
, first_actual_arg_save
;
6674 /* inquiry_argument only applies to variables. */
6675 inquiry_save
= inquiry_argument
;
6676 actual_arg_save
= actual_arg
;
6677 first_actual_arg_save
= first_actual_arg
;
6679 if (e
->expr_type
!= EXPR_VARIABLE
)
6681 inquiry_argument
= false;
6683 first_actual_arg
= false;
6685 else if (e
->symtree
!= NULL
6686 && *e
->symtree
->name
== '@'
6687 && e
->symtree
->n
.sym
->attr
.dummy
)
6689 /* Deal with submodule specification expressions that are not
6690 found to be referenced in module.c(read_cleanup). */
6691 fixup_unique_dummy (e
);
6694 switch (e
->expr_type
)
6697 t
= resolve_operator (e
);
6703 if (check_host_association (e
))
6704 t
= resolve_function (e
);
6706 t
= resolve_variable (e
);
6708 if (e
->ts
.type
== BT_CHARACTER
&& e
->ts
.u
.cl
== NULL
&& e
->ref
6709 && e
->ref
->type
!= REF_SUBSTRING
)
6710 gfc_resolve_substring_charlen (e
);
6715 t
= resolve_typebound_function (e
);
6718 case EXPR_SUBSTRING
:
6719 t
= resolve_ref (e
);
6728 t
= resolve_expr_ppc (e
);
6733 if (!resolve_ref (e
))
6736 t
= gfc_resolve_array_constructor (e
);
6737 /* Also try to expand a constructor. */
6740 expression_rank (e
);
6741 if (gfc_is_constant_expr (e
) || gfc_is_expandable_expr (e
))
6742 gfc_expand_constructor (e
, false);
6745 /* This provides the opportunity for the length of constructors with
6746 character valued function elements to propagate the string length
6747 to the expression. */
6748 if (t
&& e
->ts
.type
== BT_CHARACTER
)
6750 /* For efficiency, we call gfc_expand_constructor for BT_CHARACTER
6751 here rather then add a duplicate test for it above. */
6752 gfc_expand_constructor (e
, false);
6753 t
= gfc_resolve_character_array_constructor (e
);
6758 case EXPR_STRUCTURE
:
6759 t
= resolve_ref (e
);
6763 t
= resolve_structure_cons (e
, 0);
6767 t
= gfc_simplify_expr (e
, 0);
6771 gfc_internal_error ("gfc_resolve_expr(): Bad expression type");
6774 if (e
->ts
.type
== BT_CHARACTER
&& t
&& !e
->ts
.u
.cl
)
6777 inquiry_argument
= inquiry_save
;
6778 actual_arg
= actual_arg_save
;
6779 first_actual_arg
= first_actual_arg_save
;
6785 /* Resolve an expression from an iterator. They must be scalar and have
6786 INTEGER or (optionally) REAL type. */
6789 gfc_resolve_iterator_expr (gfc_expr
*expr
, bool real_ok
,
6790 const char *name_msgid
)
6792 if (!gfc_resolve_expr (expr
))
6795 if (expr
->rank
!= 0)
6797 gfc_error ("%s at %L must be a scalar", _(name_msgid
), &expr
->where
);
6801 if (expr
->ts
.type
!= BT_INTEGER
)
6803 if (expr
->ts
.type
== BT_REAL
)
6806 return gfc_notify_std (GFC_STD_F95_DEL
,
6807 "%s at %L must be integer",
6808 _(name_msgid
), &expr
->where
);
6811 gfc_error ("%s at %L must be INTEGER", _(name_msgid
),
6818 gfc_error ("%s at %L must be INTEGER", _(name_msgid
), &expr
->where
);
6826 /* Resolve the expressions in an iterator structure. If REAL_OK is
6827 false allow only INTEGER type iterators, otherwise allow REAL types.
6828 Set own_scope to true for ac-implied-do and data-implied-do as those
6829 have a separate scope such that, e.g., a INTENT(IN) doesn't apply. */
6832 gfc_resolve_iterator (gfc_iterator
*iter
, bool real_ok
, bool own_scope
)
6834 if (!gfc_resolve_iterator_expr (iter
->var
, real_ok
, "Loop variable"))
6837 if (!gfc_check_vardef_context (iter
->var
, false, false, own_scope
,
6838 _("iterator variable")))
6841 if (!gfc_resolve_iterator_expr (iter
->start
, real_ok
,
6842 "Start expression in DO loop"))
6845 if (!gfc_resolve_iterator_expr (iter
->end
, real_ok
,
6846 "End expression in DO loop"))
6849 if (!gfc_resolve_iterator_expr (iter
->step
, real_ok
,
6850 "Step expression in DO loop"))
6853 if (iter
->step
->expr_type
== EXPR_CONSTANT
)
6855 if ((iter
->step
->ts
.type
== BT_INTEGER
6856 && mpz_cmp_ui (iter
->step
->value
.integer
, 0) == 0)
6857 || (iter
->step
->ts
.type
== BT_REAL
6858 && mpfr_sgn (iter
->step
->value
.real
) == 0))
6860 gfc_error ("Step expression in DO loop at %L cannot be zero",
6861 &iter
->step
->where
);
6866 /* Convert start, end, and step to the same type as var. */
6867 if (iter
->start
->ts
.kind
!= iter
->var
->ts
.kind
6868 || iter
->start
->ts
.type
!= iter
->var
->ts
.type
)
6869 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
6871 if (iter
->end
->ts
.kind
!= iter
->var
->ts
.kind
6872 || iter
->end
->ts
.type
!= iter
->var
->ts
.type
)
6873 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
6875 if (iter
->step
->ts
.kind
!= iter
->var
->ts
.kind
6876 || iter
->step
->ts
.type
!= iter
->var
->ts
.type
)
6877 gfc_convert_type (iter
->step
, &iter
->var
->ts
, 1);
6879 if (iter
->start
->expr_type
== EXPR_CONSTANT
6880 && iter
->end
->expr_type
== EXPR_CONSTANT
6881 && iter
->step
->expr_type
== EXPR_CONSTANT
)
6884 if (iter
->start
->ts
.type
== BT_INTEGER
)
6886 sgn
= mpz_cmp_ui (iter
->step
->value
.integer
, 0);
6887 cmp
= mpz_cmp (iter
->end
->value
.integer
, iter
->start
->value
.integer
);
6891 sgn
= mpfr_sgn (iter
->step
->value
.real
);
6892 cmp
= mpfr_cmp (iter
->end
->value
.real
, iter
->start
->value
.real
);
6894 if (warn_zerotrip
&& ((sgn
> 0 && cmp
< 0) || (sgn
< 0 && cmp
> 0)))
6895 gfc_warning (OPT_Wzerotrip
,
6896 "DO loop at %L will be executed zero times",
6897 &iter
->step
->where
);
6900 if (iter
->end
->expr_type
== EXPR_CONSTANT
6901 && iter
->end
->ts
.type
== BT_INTEGER
6902 && iter
->step
->expr_type
== EXPR_CONSTANT
6903 && iter
->step
->ts
.type
== BT_INTEGER
6904 && (mpz_cmp_si (iter
->step
->value
.integer
, -1L) == 0
6905 || mpz_cmp_si (iter
->step
->value
.integer
, 1L) == 0))
6907 bool is_step_positive
= mpz_cmp_ui (iter
->step
->value
.integer
, 1) == 0;
6908 int k
= gfc_validate_kind (BT_INTEGER
, iter
->end
->ts
.kind
, false);
6910 if (is_step_positive
6911 && mpz_cmp (iter
->end
->value
.integer
, gfc_integer_kinds
[k
].huge
) == 0)
6912 gfc_warning (OPT_Wundefined_do_loop
,
6913 "DO loop at %L is undefined as it overflows",
6914 &iter
->step
->where
);
6915 else if (!is_step_positive
6916 && mpz_cmp (iter
->end
->value
.integer
,
6917 gfc_integer_kinds
[k
].min_int
) == 0)
6918 gfc_warning (OPT_Wundefined_do_loop
,
6919 "DO loop at %L is undefined as it underflows",
6920 &iter
->step
->where
);
6927 /* Traversal function for find_forall_index. f == 2 signals that
6928 that variable itself is not to be checked - only the references. */
6931 forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int *f
)
6933 if (expr
->expr_type
!= EXPR_VARIABLE
)
6936 /* A scalar assignment */
6937 if (!expr
->ref
|| *f
== 1)
6939 if (expr
->symtree
->n
.sym
== sym
)
6951 /* Check whether the FORALL index appears in the expression or not.
6952 Returns true if SYM is found in EXPR. */
6955 find_forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int f
)
6957 if (gfc_traverse_expr (expr
, sym
, forall_index
, f
))
6964 /* Resolve a list of FORALL iterators. The FORALL index-name is constrained
6965 to be a scalar INTEGER variable. The subscripts and stride are scalar
6966 INTEGERs, and if stride is a constant it must be nonzero.
6967 Furthermore "A subscript or stride in a forall-triplet-spec shall
6968 not contain a reference to any index-name in the
6969 forall-triplet-spec-list in which it appears." (7.5.4.1) */
6972 resolve_forall_iterators (gfc_forall_iterator
*it
)
6974 gfc_forall_iterator
*iter
, *iter2
;
6976 for (iter
= it
; iter
; iter
= iter
->next
)
6978 if (gfc_resolve_expr (iter
->var
)
6979 && (iter
->var
->ts
.type
!= BT_INTEGER
|| iter
->var
->rank
!= 0))
6980 gfc_error ("FORALL index-name at %L must be a scalar INTEGER",
6983 if (gfc_resolve_expr (iter
->start
)
6984 && (iter
->start
->ts
.type
!= BT_INTEGER
|| iter
->start
->rank
!= 0))
6985 gfc_error ("FORALL start expression at %L must be a scalar INTEGER",
6986 &iter
->start
->where
);
6987 if (iter
->var
->ts
.kind
!= iter
->start
->ts
.kind
)
6988 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
6990 if (gfc_resolve_expr (iter
->end
)
6991 && (iter
->end
->ts
.type
!= BT_INTEGER
|| iter
->end
->rank
!= 0))
6992 gfc_error ("FORALL end expression at %L must be a scalar INTEGER",
6994 if (iter
->var
->ts
.kind
!= iter
->end
->ts
.kind
)
6995 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
6997 if (gfc_resolve_expr (iter
->stride
))
6999 if (iter
->stride
->ts
.type
!= BT_INTEGER
|| iter
->stride
->rank
!= 0)
7000 gfc_error ("FORALL stride expression at %L must be a scalar %s",
7001 &iter
->stride
->where
, "INTEGER");
7003 if (iter
->stride
->expr_type
== EXPR_CONSTANT
7004 && mpz_cmp_ui (iter
->stride
->value
.integer
, 0) == 0)
7005 gfc_error ("FORALL stride expression at %L cannot be zero",
7006 &iter
->stride
->where
);
7008 if (iter
->var
->ts
.kind
!= iter
->stride
->ts
.kind
)
7009 gfc_convert_type (iter
->stride
, &iter
->var
->ts
, 1);
7012 for (iter
= it
; iter
; iter
= iter
->next
)
7013 for (iter2
= iter
; iter2
; iter2
= iter2
->next
)
7015 if (find_forall_index (iter2
->start
, iter
->var
->symtree
->n
.sym
, 0)
7016 || find_forall_index (iter2
->end
, iter
->var
->symtree
->n
.sym
, 0)
7017 || find_forall_index (iter2
->stride
, iter
->var
->symtree
->n
.sym
, 0))
7018 gfc_error ("FORALL index %qs may not appear in triplet "
7019 "specification at %L", iter
->var
->symtree
->name
,
7020 &iter2
->start
->where
);
7025 /* Given a pointer to a symbol that is a derived type, see if it's
7026 inaccessible, i.e. if it's defined in another module and the components are
7027 PRIVATE. The search is recursive if necessary. Returns zero if no
7028 inaccessible components are found, nonzero otherwise. */
7031 derived_inaccessible (gfc_symbol
*sym
)
7035 if (sym
->attr
.use_assoc
&& sym
->attr
.private_comp
)
7038 for (c
= sym
->components
; c
; c
= c
->next
)
7040 /* Prevent an infinite loop through this function. */
7041 if (c
->ts
.type
== BT_DERIVED
&& c
->attr
.pointer
7042 && sym
== c
->ts
.u
.derived
)
7045 if (c
->ts
.type
== BT_DERIVED
&& derived_inaccessible (c
->ts
.u
.derived
))
7053 /* Resolve the argument of a deallocate expression. The expression must be
7054 a pointer or a full array. */
7057 resolve_deallocate_expr (gfc_expr
*e
)
7059 symbol_attribute attr
;
7060 int allocatable
, pointer
;
7066 if (!gfc_resolve_expr (e
))
7069 if (e
->expr_type
!= EXPR_VARIABLE
)
7072 sym
= e
->symtree
->n
.sym
;
7073 unlimited
= UNLIMITED_POLY(sym
);
7075 if (sym
->ts
.type
== BT_CLASS
)
7077 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7078 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7082 allocatable
= sym
->attr
.allocatable
;
7083 pointer
= sym
->attr
.pointer
;
7085 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7090 if (ref
->u
.ar
.type
!= AR_FULL
7091 && !(ref
->u
.ar
.type
== AR_ELEMENT
&& ref
->u
.ar
.as
->rank
== 0
7092 && ref
->u
.ar
.codimen
&& gfc_ref_this_image (ref
)))
7097 c
= ref
->u
.c
.component
;
7098 if (c
->ts
.type
== BT_CLASS
)
7100 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7101 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7105 allocatable
= c
->attr
.allocatable
;
7106 pointer
= c
->attr
.pointer
;
7116 attr
= gfc_expr_attr (e
);
7118 if (allocatable
== 0 && attr
.pointer
== 0 && !unlimited
)
7121 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7127 if (gfc_is_coindexed (e
))
7129 gfc_error ("Coindexed allocatable object at %L", &e
->where
);
7134 && !gfc_check_vardef_context (e
, true, true, false,
7135 _("DEALLOCATE object")))
7137 if (!gfc_check_vardef_context (e
, false, true, false,
7138 _("DEALLOCATE object")))
7145 /* Returns true if the expression e contains a reference to the symbol sym. */
7147 sym_in_expr (gfc_expr
*e
, gfc_symbol
*sym
, int *f ATTRIBUTE_UNUSED
)
7149 if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
== sym
)
7156 gfc_find_sym_in_expr (gfc_symbol
*sym
, gfc_expr
*e
)
7158 return gfc_traverse_expr (e
, sym
, sym_in_expr
, 0);
7162 /* Given the expression node e for an allocatable/pointer of derived type to be
7163 allocated, get the expression node to be initialized afterwards (needed for
7164 derived types with default initializers, and derived types with allocatable
7165 components that need nullification.) */
7168 gfc_expr_to_initialize (gfc_expr
*e
)
7174 result
= gfc_copy_expr (e
);
7176 /* Change the last array reference from AR_ELEMENT to AR_FULL. */
7177 for (ref
= result
->ref
; ref
; ref
= ref
->next
)
7178 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
7180 ref
->u
.ar
.type
= AR_FULL
;
7182 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
7183 ref
->u
.ar
.start
[i
] = ref
->u
.ar
.end
[i
] = ref
->u
.ar
.stride
[i
] = NULL
;
7188 gfc_free_shape (&result
->shape
, result
->rank
);
7190 /* Recalculate rank, shape, etc. */
7191 gfc_resolve_expr (result
);
7196 /* If the last ref of an expression is an array ref, return a copy of the
7197 expression with that one removed. Otherwise, a copy of the original
7198 expression. This is used for allocate-expressions and pointer assignment
7199 LHS, where there may be an array specification that needs to be stripped
7200 off when using gfc_check_vardef_context. */
7203 remove_last_array_ref (gfc_expr
* e
)
7208 e2
= gfc_copy_expr (e
);
7209 for (r
= &e2
->ref
; *r
; r
= &(*r
)->next
)
7210 if ((*r
)->type
== REF_ARRAY
&& !(*r
)->next
)
7212 gfc_free_ref_list (*r
);
7221 /* Used in resolve_allocate_expr to check that a allocation-object and
7222 a source-expr are conformable. This does not catch all possible
7223 cases; in particular a runtime checking is needed. */
7226 conformable_arrays (gfc_expr
*e1
, gfc_expr
*e2
)
7229 for (tail
= e2
->ref
; tail
&& tail
->next
; tail
= tail
->next
);
7231 /* First compare rank. */
7232 if ((tail
&& e1
->rank
!= tail
->u
.ar
.as
->rank
)
7233 || (!tail
&& e1
->rank
!= e2
->rank
))
7235 gfc_error ("Source-expr at %L must be scalar or have the "
7236 "same rank as the allocate-object at %L",
7237 &e1
->where
, &e2
->where
);
7248 for (i
= 0; i
< e1
->rank
; i
++)
7250 if (tail
->u
.ar
.start
[i
] == NULL
)
7253 if (tail
->u
.ar
.end
[i
])
7255 mpz_set (s
, tail
->u
.ar
.end
[i
]->value
.integer
);
7256 mpz_sub (s
, s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7257 mpz_add_ui (s
, s
, 1);
7261 mpz_set (s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7264 if (mpz_cmp (e1
->shape
[i
], s
) != 0)
7266 gfc_error ("Source-expr at %L and allocate-object at %L must "
7267 "have the same shape", &e1
->where
, &e2
->where
);
7280 /* Resolve the expression in an ALLOCATE statement, doing the additional
7281 checks to see whether the expression is OK or not. The expression must
7282 have a trailing array reference that gives the size of the array. */
7285 resolve_allocate_expr (gfc_expr
*e
, gfc_code
*code
, bool *array_alloc_wo_spec
)
7287 int i
, pointer
, allocatable
, dimension
, is_abstract
;
7291 symbol_attribute attr
;
7292 gfc_ref
*ref
, *ref2
;
7295 gfc_symbol
*sym
= NULL
;
7300 /* Mark the utmost array component as being in allocate to allow DIMEN_STAR
7301 checking of coarrays. */
7302 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7303 if (ref
->next
== NULL
)
7306 if (ref
&& ref
->type
== REF_ARRAY
)
7307 ref
->u
.ar
.in_allocate
= true;
7309 if (!gfc_resolve_expr (e
))
7312 /* Make sure the expression is allocatable or a pointer. If it is
7313 pointer, the next-to-last reference must be a pointer. */
7317 sym
= e
->symtree
->n
.sym
;
7319 /* Check whether ultimate component is abstract and CLASS. */
7322 /* Is the allocate-object unlimited polymorphic? */
7323 unlimited
= UNLIMITED_POLY(e
);
7325 if (e
->expr_type
!= EXPR_VARIABLE
)
7328 attr
= gfc_expr_attr (e
);
7329 pointer
= attr
.pointer
;
7330 dimension
= attr
.dimension
;
7331 codimension
= attr
.codimension
;
7335 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
))
7337 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7338 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7339 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
7340 codimension
= CLASS_DATA (sym
)->attr
.codimension
;
7341 is_abstract
= CLASS_DATA (sym
)->attr
.abstract
;
7345 allocatable
= sym
->attr
.allocatable
;
7346 pointer
= sym
->attr
.pointer
;
7347 dimension
= sym
->attr
.dimension
;
7348 codimension
= sym
->attr
.codimension
;
7353 for (ref
= e
->ref
; ref
; ref2
= ref
, ref
= ref
->next
)
7358 if (ref
->u
.ar
.codimen
> 0)
7361 for (n
= ref
->u
.ar
.dimen
;
7362 n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
7363 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_THIS_IMAGE
)
7370 if (ref
->next
!= NULL
)
7378 gfc_error ("Coindexed allocatable object at %L",
7383 c
= ref
->u
.c
.component
;
7384 if (c
->ts
.type
== BT_CLASS
)
7386 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7387 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7388 dimension
= CLASS_DATA (c
)->attr
.dimension
;
7389 codimension
= CLASS_DATA (c
)->attr
.codimension
;
7390 is_abstract
= CLASS_DATA (c
)->attr
.abstract
;
7394 allocatable
= c
->attr
.allocatable
;
7395 pointer
= c
->attr
.pointer
;
7396 dimension
= c
->attr
.dimension
;
7397 codimension
= c
->attr
.codimension
;
7398 is_abstract
= c
->attr
.abstract
;
7410 /* Check for F08:C628. */
7411 if (allocatable
== 0 && pointer
== 0 && !unlimited
)
7413 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7418 /* Some checks for the SOURCE tag. */
7421 /* Check F03:C631. */
7422 if (!gfc_type_compatible (&e
->ts
, &code
->expr3
->ts
))
7424 gfc_error ("Type of entity at %L is type incompatible with "
7425 "source-expr at %L", &e
->where
, &code
->expr3
->where
);
7429 /* Check F03:C632 and restriction following Note 6.18. */
7430 if (code
->expr3
->rank
> 0 && !conformable_arrays (code
->expr3
, e
))
7433 /* Check F03:C633. */
7434 if (code
->expr3
->ts
.kind
!= e
->ts
.kind
&& !unlimited
)
7436 gfc_error ("The allocate-object at %L and the source-expr at %L "
7437 "shall have the same kind type parameter",
7438 &e
->where
, &code
->expr3
->where
);
7442 /* Check F2008, C642. */
7443 if (code
->expr3
->ts
.type
== BT_DERIVED
7444 && ((codimension
&& gfc_expr_attr (code
->expr3
).lock_comp
)
7445 || (code
->expr3
->ts
.u
.derived
->from_intmod
7446 == INTMOD_ISO_FORTRAN_ENV
7447 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7448 == ISOFORTRAN_LOCK_TYPE
)))
7450 gfc_error ("The source-expr at %L shall neither be of type "
7451 "LOCK_TYPE nor have a LOCK_TYPE component if "
7452 "allocate-object at %L is a coarray",
7453 &code
->expr3
->where
, &e
->where
);
7457 /* Check TS18508, C702/C703. */
7458 if (code
->expr3
->ts
.type
== BT_DERIVED
7459 && ((codimension
&& gfc_expr_attr (code
->expr3
).event_comp
)
7460 || (code
->expr3
->ts
.u
.derived
->from_intmod
7461 == INTMOD_ISO_FORTRAN_ENV
7462 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7463 == ISOFORTRAN_EVENT_TYPE
)))
7465 gfc_error ("The source-expr at %L shall neither be of type "
7466 "EVENT_TYPE nor have a EVENT_TYPE component if "
7467 "allocate-object at %L is a coarray",
7468 &code
->expr3
->where
, &e
->where
);
7473 /* Check F08:C629. */
7474 if (is_abstract
&& code
->ext
.alloc
.ts
.type
== BT_UNKNOWN
7477 gcc_assert (e
->ts
.type
== BT_CLASS
);
7478 gfc_error ("Allocating %s of ABSTRACT base type at %L requires a "
7479 "type-spec or source-expr", sym
->name
, &e
->where
);
7483 /* Check F08:C632. */
7484 if (code
->ext
.alloc
.ts
.type
== BT_CHARACTER
&& !e
->ts
.deferred
7485 && !UNLIMITED_POLY (e
))
7489 if (!e
->ts
.u
.cl
->length
)
7492 cmp
= gfc_dep_compare_expr (e
->ts
.u
.cl
->length
,
7493 code
->ext
.alloc
.ts
.u
.cl
->length
);
7494 if (cmp
== 1 || cmp
== -1 || cmp
== -3)
7496 gfc_error ("Allocating %s at %L with type-spec requires the same "
7497 "character-length parameter as in the declaration",
7498 sym
->name
, &e
->where
);
7503 /* In the variable definition context checks, gfc_expr_attr is used
7504 on the expression. This is fooled by the array specification
7505 present in e, thus we have to eliminate that one temporarily. */
7506 e2
= remove_last_array_ref (e
);
7509 t
= gfc_check_vardef_context (e2
, true, true, false,
7510 _("ALLOCATE object"));
7512 t
= gfc_check_vardef_context (e2
, false, true, false,
7513 _("ALLOCATE object"));
7518 if (e
->ts
.type
== BT_CLASS
&& CLASS_DATA (e
)->attr
.dimension
7519 && !code
->expr3
&& code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7521 /* For class arrays, the initialization with SOURCE is done
7522 using _copy and trans_call. It is convenient to exploit that
7523 when the allocated type is different from the declared type but
7524 no SOURCE exists by setting expr3. */
7525 code
->expr3
= gfc_default_initializer (&code
->ext
.alloc
.ts
);
7527 else if (flag_coarray
!= GFC_FCOARRAY_LIB
&& e
->ts
.type
== BT_DERIVED
7528 && e
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
7529 && e
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
7531 /* We have to zero initialize the integer variable. */
7532 code
->expr3
= gfc_get_int_expr (gfc_default_integer_kind
, &e
->where
, 0);
7535 if (e
->ts
.type
== BT_CLASS
&& !unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7537 /* Make sure the vtab symbol is present when
7538 the module variables are generated. */
7539 gfc_typespec ts
= e
->ts
;
7541 ts
= code
->expr3
->ts
;
7542 else if (code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7543 ts
= code
->ext
.alloc
.ts
;
7545 /* Finding the vtab also publishes the type's symbol. Therefore this
7546 statement is necessary. */
7547 gfc_find_derived_vtab (ts
.u
.derived
);
7549 else if (unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7551 /* Again, make sure the vtab symbol is present when
7552 the module variables are generated. */
7553 gfc_typespec
*ts
= NULL
;
7555 ts
= &code
->expr3
->ts
;
7557 ts
= &code
->ext
.alloc
.ts
;
7561 /* Finding the vtab also publishes the type's symbol. Therefore this
7562 statement is necessary. */
7566 if (dimension
== 0 && codimension
== 0)
7569 /* Make sure the last reference node is an array specification. */
7571 if (!ref2
|| ref2
->type
!= REF_ARRAY
|| ref2
->u
.ar
.type
== AR_FULL
7572 || (dimension
&& ref2
->u
.ar
.dimen
== 0))
7577 if (!gfc_notify_std (GFC_STD_F2008
, "Array specification required "
7578 "in ALLOCATE statement at %L", &e
->where
))
7580 if (code
->expr3
->rank
!= 0)
7581 *array_alloc_wo_spec
= true;
7584 gfc_error ("Array specification or array-valued SOURCE= "
7585 "expression required in ALLOCATE statement at %L",
7592 gfc_error ("Array specification required in ALLOCATE statement "
7593 "at %L", &e
->where
);
7598 /* Make sure that the array section reference makes sense in the
7599 context of an ALLOCATE specification. */
7604 for (i
= ar
->dimen
; i
< ar
->dimen
+ ar
->codimen
; i
++)
7605 if (ar
->dimen_type
[i
] == DIMEN_THIS_IMAGE
)
7607 gfc_error ("Coarray specification required in ALLOCATE statement "
7608 "at %L", &e
->where
);
7612 for (i
= 0; i
< ar
->dimen
; i
++)
7614 if (ar
->type
== AR_ELEMENT
|| ar
->type
== AR_FULL
)
7617 switch (ar
->dimen_type
[i
])
7623 if (ar
->start
[i
] != NULL
7624 && ar
->end
[i
] != NULL
7625 && ar
->stride
[i
] == NULL
)
7633 case DIMEN_THIS_IMAGE
:
7634 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7640 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7642 sym
= a
->expr
->symtree
->n
.sym
;
7644 /* TODO - check derived type components. */
7645 if (gfc_bt_struct (sym
->ts
.type
) || sym
->ts
.type
== BT_CLASS
)
7648 if ((ar
->start
[i
] != NULL
7649 && gfc_find_sym_in_expr (sym
, ar
->start
[i
]))
7650 || (ar
->end
[i
] != NULL
7651 && gfc_find_sym_in_expr (sym
, ar
->end
[i
])))
7653 gfc_error ("%qs must not appear in the array specification at "
7654 "%L in the same ALLOCATE statement where it is "
7655 "itself allocated", sym
->name
, &ar
->where
);
7661 for (i
= ar
->dimen
; i
< ar
->codimen
+ ar
->dimen
; i
++)
7663 if (ar
->dimen_type
[i
] == DIMEN_ELEMENT
7664 || ar
->dimen_type
[i
] == DIMEN_RANGE
)
7666 if (i
== (ar
->dimen
+ ar
->codimen
- 1))
7668 gfc_error ("Expected '*' in coindex specification in ALLOCATE "
7669 "statement at %L", &e
->where
);
7675 if (ar
->dimen_type
[i
] == DIMEN_STAR
&& i
== (ar
->dimen
+ ar
->codimen
- 1)
7676 && ar
->stride
[i
] == NULL
)
7679 gfc_error ("Bad coarray specification in ALLOCATE statement at %L",
7693 resolve_allocate_deallocate (gfc_code
*code
, const char *fcn
)
7695 gfc_expr
*stat
, *errmsg
, *pe
, *qe
;
7696 gfc_alloc
*a
, *p
, *q
;
7699 errmsg
= code
->expr2
;
7701 /* Check the stat variable. */
7704 gfc_check_vardef_context (stat
, false, false, false,
7705 _("STAT variable"));
7707 if ((stat
->ts
.type
!= BT_INTEGER
7708 && !(stat
->ref
&& (stat
->ref
->type
== REF_ARRAY
7709 || stat
->ref
->type
== REF_COMPONENT
)))
7711 gfc_error ("Stat-variable at %L must be a scalar INTEGER "
7712 "variable", &stat
->where
);
7714 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7715 if (p
->expr
->symtree
->n
.sym
->name
== stat
->symtree
->n
.sym
->name
)
7717 gfc_ref
*ref1
, *ref2
;
7720 for (ref1
= p
->expr
->ref
, ref2
= stat
->ref
; ref1
&& ref2
;
7721 ref1
= ref1
->next
, ref2
= ref2
->next
)
7723 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7725 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7734 gfc_error ("Stat-variable at %L shall not be %sd within "
7735 "the same %s statement", &stat
->where
, fcn
, fcn
);
7741 /* Check the errmsg variable. */
7745 gfc_warning (0, "ERRMSG at %L is useless without a STAT tag",
7748 gfc_check_vardef_context (errmsg
, false, false, false,
7749 _("ERRMSG variable"));
7751 if ((errmsg
->ts
.type
!= BT_CHARACTER
7753 && (errmsg
->ref
->type
== REF_ARRAY
7754 || errmsg
->ref
->type
== REF_COMPONENT
)))
7755 || errmsg
->rank
> 0 )
7756 gfc_error ("Errmsg-variable at %L must be a scalar CHARACTER "
7757 "variable", &errmsg
->where
);
7759 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7760 if (p
->expr
->symtree
->n
.sym
->name
== errmsg
->symtree
->n
.sym
->name
)
7762 gfc_ref
*ref1
, *ref2
;
7765 for (ref1
= p
->expr
->ref
, ref2
= errmsg
->ref
; ref1
&& ref2
;
7766 ref1
= ref1
->next
, ref2
= ref2
->next
)
7768 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7770 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7779 gfc_error ("Errmsg-variable at %L shall not be %sd within "
7780 "the same %s statement", &errmsg
->where
, fcn
, fcn
);
7786 /* Check that an allocate-object appears only once in the statement. */
7788 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7791 for (q
= p
->next
; q
; q
= q
->next
)
7794 if (pe
->symtree
->n
.sym
->name
== qe
->symtree
->n
.sym
->name
)
7796 /* This is a potential collision. */
7797 gfc_ref
*pr
= pe
->ref
;
7798 gfc_ref
*qr
= qe
->ref
;
7800 /* Follow the references until
7801 a) They start to differ, in which case there is no error;
7802 you can deallocate a%b and a%c in a single statement
7803 b) Both of them stop, which is an error
7804 c) One of them stops, which is also an error. */
7807 if (pr
== NULL
&& qr
== NULL
)
7809 gfc_error ("Allocate-object at %L also appears at %L",
7810 &pe
->where
, &qe
->where
);
7813 else if (pr
!= NULL
&& qr
== NULL
)
7815 gfc_error ("Allocate-object at %L is subobject of"
7816 " object at %L", &pe
->where
, &qe
->where
);
7819 else if (pr
== NULL
&& qr
!= NULL
)
7821 gfc_error ("Allocate-object at %L is subobject of"
7822 " object at %L", &qe
->where
, &pe
->where
);
7825 /* Here, pr != NULL && qr != NULL */
7826 gcc_assert(pr
->type
== qr
->type
);
7827 if (pr
->type
== REF_ARRAY
)
7829 /* Handle cases like allocate(v(3)%x(3), v(2)%x(3)),
7831 gcc_assert (qr
->type
== REF_ARRAY
);
7833 if (pr
->next
&& qr
->next
)
7836 gfc_array_ref
*par
= &(pr
->u
.ar
);
7837 gfc_array_ref
*qar
= &(qr
->u
.ar
);
7839 for (i
=0; i
<par
->dimen
; i
++)
7841 if ((par
->start
[i
] != NULL
7842 || qar
->start
[i
] != NULL
)
7843 && gfc_dep_compare_expr (par
->start
[i
],
7844 qar
->start
[i
]) != 0)
7851 if (pr
->u
.c
.component
->name
!= qr
->u
.c
.component
->name
)
7864 if (strcmp (fcn
, "ALLOCATE") == 0)
7866 bool arr_alloc_wo_spec
= false;
7868 /* Resolving the expr3 in the loop over all objects to allocate would
7869 execute loop invariant code for each loop item. Therefore do it just
7871 if (code
->expr3
&& code
->expr3
->mold
7872 && code
->expr3
->ts
.type
== BT_DERIVED
)
7874 /* Default initialization via MOLD (non-polymorphic). */
7875 gfc_expr
*rhs
= gfc_default_initializer (&code
->expr3
->ts
);
7878 gfc_resolve_expr (rhs
);
7879 gfc_free_expr (code
->expr3
);
7883 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7884 resolve_allocate_expr (a
->expr
, code
, &arr_alloc_wo_spec
);
7886 if (arr_alloc_wo_spec
&& code
->expr3
)
7888 /* Mark the allocate to have to take the array specification
7890 code
->ext
.alloc
.arr_spec_from_expr3
= 1;
7895 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7896 resolve_deallocate_expr (a
->expr
);
7901 /************ SELECT CASE resolution subroutines ************/
7903 /* Callback function for our mergesort variant. Determines interval
7904 overlaps for CASEs. Return <0 if op1 < op2, 0 for overlap, >0 for
7905 op1 > op2. Assumes we're not dealing with the default case.
7906 We have op1 = (:L), (K:L) or (K:) and op2 = (:N), (M:N) or (M:).
7907 There are nine situations to check. */
7910 compare_cases (const gfc_case
*op1
, const gfc_case
*op2
)
7914 if (op1
->low
== NULL
) /* op1 = (:L) */
7916 /* op2 = (:N), so overlap. */
7918 /* op2 = (M:) or (M:N), L < M */
7919 if (op2
->low
!= NULL
7920 && gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
7923 else if (op1
->high
== NULL
) /* op1 = (K:) */
7925 /* op2 = (M:), so overlap. */
7927 /* op2 = (:N) or (M:N), K > N */
7928 if (op2
->high
!= NULL
7929 && gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
7932 else /* op1 = (K:L) */
7934 if (op2
->low
== NULL
) /* op2 = (:N), K > N */
7935 retval
= (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
7937 else if (op2
->high
== NULL
) /* op2 = (M:), L < M */
7938 retval
= (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
7940 else /* op2 = (M:N) */
7944 if (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
7947 else if (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
7956 /* Merge-sort a double linked case list, detecting overlap in the
7957 process. LIST is the head of the double linked case list before it
7958 is sorted. Returns the head of the sorted list if we don't see any
7959 overlap, or NULL otherwise. */
7962 check_case_overlap (gfc_case
*list
)
7964 gfc_case
*p
, *q
, *e
, *tail
;
7965 int insize
, nmerges
, psize
, qsize
, cmp
, overlap_seen
;
7967 /* If the passed list was empty, return immediately. */
7974 /* Loop unconditionally. The only exit from this loop is a return
7975 statement, when we've finished sorting the case list. */
7982 /* Count the number of merges we do in this pass. */
7985 /* Loop while there exists a merge to be done. */
7990 /* Count this merge. */
7993 /* Cut the list in two pieces by stepping INSIZE places
7994 forward in the list, starting from P. */
7997 for (i
= 0; i
< insize
; i
++)
8006 /* Now we have two lists. Merge them! */
8007 while (psize
> 0 || (qsize
> 0 && q
!= NULL
))
8009 /* See from which the next case to merge comes from. */
8012 /* P is empty so the next case must come from Q. */
8017 else if (qsize
== 0 || q
== NULL
)
8026 cmp
= compare_cases (p
, q
);
8029 /* The whole case range for P is less than the
8037 /* The whole case range for Q is greater than
8038 the case range for P. */
8045 /* The cases overlap, or they are the same
8046 element in the list. Either way, we must
8047 issue an error and get the next case from P. */
8048 /* FIXME: Sort P and Q by line number. */
8049 gfc_error ("CASE label at %L overlaps with CASE "
8050 "label at %L", &p
->where
, &q
->where
);
8058 /* Add the next element to the merged list. */
8067 /* P has now stepped INSIZE places along, and so has Q. So
8068 they're the same. */
8073 /* If we have done only one merge or none at all, we've
8074 finished sorting the cases. */
8083 /* Otherwise repeat, merging lists twice the size. */
8089 /* Check to see if an expression is suitable for use in a CASE statement.
8090 Makes sure that all case expressions are scalar constants of the same
8091 type. Return false if anything is wrong. */
8094 validate_case_label_expr (gfc_expr
*e
, gfc_expr
*case_expr
)
8096 if (e
== NULL
) return true;
8098 if (e
->ts
.type
!= case_expr
->ts
.type
)
8100 gfc_error ("Expression in CASE statement at %L must be of type %s",
8101 &e
->where
, gfc_basic_typename (case_expr
->ts
.type
));
8105 /* C805 (R808) For a given case-construct, each case-value shall be of
8106 the same type as case-expr. For character type, length differences
8107 are allowed, but the kind type parameters shall be the same. */
8109 if (case_expr
->ts
.type
== BT_CHARACTER
&& e
->ts
.kind
!= case_expr
->ts
.kind
)
8111 gfc_error ("Expression in CASE statement at %L must be of kind %d",
8112 &e
->where
, case_expr
->ts
.kind
);
8116 /* Convert the case value kind to that of case expression kind,
8119 if (e
->ts
.kind
!= case_expr
->ts
.kind
)
8120 gfc_convert_type_warn (e
, &case_expr
->ts
, 2, 0);
8124 gfc_error ("Expression in CASE statement at %L must be scalar",
8133 /* Given a completely parsed select statement, we:
8135 - Validate all expressions and code within the SELECT.
8136 - Make sure that the selection expression is not of the wrong type.
8137 - Make sure that no case ranges overlap.
8138 - Eliminate unreachable cases and unreachable code resulting from
8139 removing case labels.
8141 The standard does allow unreachable cases, e.g. CASE (5:3). But
8142 they are a hassle for code generation, and to prevent that, we just
8143 cut them out here. This is not necessary for overlapping cases
8144 because they are illegal and we never even try to generate code.
8146 We have the additional caveat that a SELECT construct could have
8147 been a computed GOTO in the source code. Fortunately we can fairly
8148 easily work around that here: The case_expr for a "real" SELECT CASE
8149 is in code->expr1, but for a computed GOTO it is in code->expr2. All
8150 we have to do is make sure that the case_expr is a scalar integer
8154 resolve_select (gfc_code
*code
, bool select_type
)
8157 gfc_expr
*case_expr
;
8158 gfc_case
*cp
, *default_case
, *tail
, *head
;
8159 int seen_unreachable
;
8165 if (code
->expr1
== NULL
)
8167 /* This was actually a computed GOTO statement. */
8168 case_expr
= code
->expr2
;
8169 if (case_expr
->ts
.type
!= BT_INTEGER
|| case_expr
->rank
!= 0)
8170 gfc_error ("Selection expression in computed GOTO statement "
8171 "at %L must be a scalar integer expression",
8174 /* Further checking is not necessary because this SELECT was built
8175 by the compiler, so it should always be OK. Just move the
8176 case_expr from expr2 to expr so that we can handle computed
8177 GOTOs as normal SELECTs from here on. */
8178 code
->expr1
= code
->expr2
;
8183 case_expr
= code
->expr1
;
8184 type
= case_expr
->ts
.type
;
8187 if (type
!= BT_LOGICAL
&& type
!= BT_INTEGER
&& type
!= BT_CHARACTER
)
8189 gfc_error ("Argument of SELECT statement at %L cannot be %s",
8190 &case_expr
->where
, gfc_typename (&case_expr
->ts
));
8192 /* Punt. Going on here just produce more garbage error messages. */
8197 if (!select_type
&& case_expr
->rank
!= 0)
8199 gfc_error ("Argument of SELECT statement at %L must be a scalar "
8200 "expression", &case_expr
->where
);
8206 /* Raise a warning if an INTEGER case value exceeds the range of
8207 the case-expr. Later, all expressions will be promoted to the
8208 largest kind of all case-labels. */
8210 if (type
== BT_INTEGER
)
8211 for (body
= code
->block
; body
; body
= body
->block
)
8212 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8215 && gfc_check_integer_range (cp
->low
->value
.integer
,
8216 case_expr
->ts
.kind
) != ARITH_OK
)
8217 gfc_warning (0, "Expression in CASE statement at %L is "
8218 "not in the range of %s", &cp
->low
->where
,
8219 gfc_typename (&case_expr
->ts
));
8222 && cp
->low
!= cp
->high
8223 && gfc_check_integer_range (cp
->high
->value
.integer
,
8224 case_expr
->ts
.kind
) != ARITH_OK
)
8225 gfc_warning (0, "Expression in CASE statement at %L is "
8226 "not in the range of %s", &cp
->high
->where
,
8227 gfc_typename (&case_expr
->ts
));
8230 /* PR 19168 has a long discussion concerning a mismatch of the kinds
8231 of the SELECT CASE expression and its CASE values. Walk the lists
8232 of case values, and if we find a mismatch, promote case_expr to
8233 the appropriate kind. */
8235 if (type
== BT_LOGICAL
|| type
== BT_INTEGER
)
8237 for (body
= code
->block
; body
; body
= body
->block
)
8239 /* Walk the case label list. */
8240 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8242 /* Intercept the DEFAULT case. It does not have a kind. */
8243 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8246 /* Unreachable case ranges are discarded, so ignore. */
8247 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8248 && cp
->low
!= cp
->high
8249 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8253 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->low
))
8254 gfc_convert_type_warn (case_expr
, &cp
->low
->ts
, 2, 0);
8256 if (cp
->high
!= NULL
8257 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->high
))
8258 gfc_convert_type_warn (case_expr
, &cp
->high
->ts
, 2, 0);
8263 /* Assume there is no DEFAULT case. */
8264 default_case
= NULL
;
8269 for (body
= code
->block
; body
; body
= body
->block
)
8271 /* Assume the CASE list is OK, and all CASE labels can be matched. */
8273 seen_unreachable
= 0;
8275 /* Walk the case label list, making sure that all case labels
8277 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8279 /* Count the number of cases in the whole construct. */
8282 /* Intercept the DEFAULT case. */
8283 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8285 if (default_case
!= NULL
)
8287 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8288 "by a second DEFAULT CASE at %L",
8289 &default_case
->where
, &cp
->where
);
8300 /* Deal with single value cases and case ranges. Errors are
8301 issued from the validation function. */
8302 if (!validate_case_label_expr (cp
->low
, case_expr
)
8303 || !validate_case_label_expr (cp
->high
, case_expr
))
8309 if (type
== BT_LOGICAL
8310 && ((cp
->low
== NULL
|| cp
->high
== NULL
)
8311 || cp
->low
!= cp
->high
))
8313 gfc_error ("Logical range in CASE statement at %L is not "
8314 "allowed", &cp
->low
->where
);
8319 if (type
== BT_LOGICAL
&& cp
->low
->expr_type
== EXPR_CONSTANT
)
8322 value
= cp
->low
->value
.logical
== 0 ? 2 : 1;
8323 if (value
& seen_logical
)
8325 gfc_error ("Constant logical value in CASE statement "
8326 "is repeated at %L",
8331 seen_logical
|= value
;
8334 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8335 && cp
->low
!= cp
->high
8336 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8338 if (warn_surprising
)
8339 gfc_warning (OPT_Wsurprising
,
8340 "Range specification at %L can never be matched",
8343 cp
->unreachable
= 1;
8344 seen_unreachable
= 1;
8348 /* If the case range can be matched, it can also overlap with
8349 other cases. To make sure it does not, we put it in a
8350 double linked list here. We sort that with a merge sort
8351 later on to detect any overlapping cases. */
8355 head
->right
= head
->left
= NULL
;
8360 tail
->right
->left
= tail
;
8367 /* It there was a failure in the previous case label, give up
8368 for this case label list. Continue with the next block. */
8372 /* See if any case labels that are unreachable have been seen.
8373 If so, we eliminate them. This is a bit of a kludge because
8374 the case lists for a single case statement (label) is a
8375 single forward linked lists. */
8376 if (seen_unreachable
)
8378 /* Advance until the first case in the list is reachable. */
8379 while (body
->ext
.block
.case_list
!= NULL
8380 && body
->ext
.block
.case_list
->unreachable
)
8382 gfc_case
*n
= body
->ext
.block
.case_list
;
8383 body
->ext
.block
.case_list
= body
->ext
.block
.case_list
->next
;
8385 gfc_free_case_list (n
);
8388 /* Strip all other unreachable cases. */
8389 if (body
->ext
.block
.case_list
)
8391 for (cp
= body
->ext
.block
.case_list
; cp
&& cp
->next
; cp
= cp
->next
)
8393 if (cp
->next
->unreachable
)
8395 gfc_case
*n
= cp
->next
;
8396 cp
->next
= cp
->next
->next
;
8398 gfc_free_case_list (n
);
8405 /* See if there were overlapping cases. If the check returns NULL,
8406 there was overlap. In that case we don't do anything. If head
8407 is non-NULL, we prepend the DEFAULT case. The sorted list can
8408 then used during code generation for SELECT CASE constructs with
8409 a case expression of a CHARACTER type. */
8412 head
= check_case_overlap (head
);
8414 /* Prepend the default_case if it is there. */
8415 if (head
!= NULL
&& default_case
)
8417 default_case
->left
= NULL
;
8418 default_case
->right
= head
;
8419 head
->left
= default_case
;
8423 /* Eliminate dead blocks that may be the result if we've seen
8424 unreachable case labels for a block. */
8425 for (body
= code
; body
&& body
->block
; body
= body
->block
)
8427 if (body
->block
->ext
.block
.case_list
== NULL
)
8429 /* Cut the unreachable block from the code chain. */
8430 gfc_code
*c
= body
->block
;
8431 body
->block
= c
->block
;
8433 /* Kill the dead block, but not the blocks below it. */
8435 gfc_free_statements (c
);
8439 /* More than two cases is legal but insane for logical selects.
8440 Issue a warning for it. */
8441 if (warn_surprising
&& type
== BT_LOGICAL
&& ncases
> 2)
8442 gfc_warning (OPT_Wsurprising
,
8443 "Logical SELECT CASE block at %L has more that two cases",
8448 /* Check if a derived type is extensible. */
8451 gfc_type_is_extensible (gfc_symbol
*sym
)
8453 return !(sym
->attr
.is_bind_c
|| sym
->attr
.sequence
8454 || (sym
->attr
.is_class
8455 && sym
->components
->ts
.u
.derived
->attr
.unlimited_polymorphic
));
8460 resolve_types (gfc_namespace
*ns
);
8462 /* Resolve an associate-name: Resolve target and ensure the type-spec is
8463 correct as well as possibly the array-spec. */
8466 resolve_assoc_var (gfc_symbol
* sym
, bool resolve_target
)
8470 gcc_assert (sym
->assoc
);
8471 gcc_assert (sym
->attr
.flavor
== FL_VARIABLE
);
8473 /* If this is for SELECT TYPE, the target may not yet be set. In that
8474 case, return. Resolution will be called later manually again when
8476 target
= sym
->assoc
->target
;
8479 gcc_assert (!sym
->assoc
->dangling
);
8481 if (resolve_target
&& !gfc_resolve_expr (target
))
8484 /* For variable targets, we get some attributes from the target. */
8485 if (target
->expr_type
== EXPR_VARIABLE
)
8489 gcc_assert (target
->symtree
);
8490 tsym
= target
->symtree
->n
.sym
;
8492 sym
->attr
.asynchronous
= tsym
->attr
.asynchronous
;
8493 sym
->attr
.volatile_
= tsym
->attr
.volatile_
;
8495 sym
->attr
.target
= tsym
->attr
.target
8496 || gfc_expr_attr (target
).pointer
;
8497 if (is_subref_array (target
))
8498 sym
->attr
.subref_array_pointer
= 1;
8501 if (target
->expr_type
== EXPR_NULL
)
8503 gfc_error ("Selector at %L cannot be NULL()", &target
->where
);
8506 else if (target
->ts
.type
== BT_UNKNOWN
)
8508 gfc_error ("Selector at %L has no type", &target
->where
);
8512 /* Get type if this was not already set. Note that it can be
8513 some other type than the target in case this is a SELECT TYPE
8514 selector! So we must not update when the type is already there. */
8515 if (sym
->ts
.type
== BT_UNKNOWN
)
8516 sym
->ts
= target
->ts
;
8518 gcc_assert (sym
->ts
.type
!= BT_UNKNOWN
);
8520 /* See if this is a valid association-to-variable. */
8521 sym
->assoc
->variable
= (target
->expr_type
== EXPR_VARIABLE
8522 && !gfc_has_vector_subscript (target
));
8524 /* Finally resolve if this is an array or not. */
8525 if (sym
->attr
.dimension
&& target
->rank
== 0)
8527 /* primary.c makes the assumption that a reference to an associate
8528 name followed by a left parenthesis is an array reference. */
8529 if (sym
->ts
.type
!= BT_CHARACTER
)
8530 gfc_error ("Associate-name %qs at %L is used as array",
8531 sym
->name
, &sym
->declared_at
);
8532 sym
->attr
.dimension
= 0;
8537 /* We cannot deal with class selectors that need temporaries. */
8538 if (target
->ts
.type
== BT_CLASS
8539 && gfc_ref_needs_temporary_p (target
->ref
))
8541 gfc_error ("CLASS selector at %L needs a temporary which is not "
8542 "yet implemented", &target
->where
);
8546 if (target
->ts
.type
== BT_CLASS
)
8547 gfc_fix_class_refs (target
);
8549 if (target
->rank
!= 0)
8552 /* The rank may be incorrectly guessed at parsing, therefore make sure
8553 it is corrected now. */
8554 if (sym
->ts
.type
!= BT_CLASS
&& (!sym
->as
|| sym
->assoc
->rankguessed
))
8557 sym
->as
= gfc_get_array_spec ();
8559 as
->rank
= target
->rank
;
8560 as
->type
= AS_DEFERRED
;
8561 as
->corank
= gfc_get_corank (target
);
8562 sym
->attr
.dimension
= 1;
8563 if (as
->corank
!= 0)
8564 sym
->attr
.codimension
= 1;
8569 /* target's rank is 0, but the type of the sym is still array valued,
8570 which has to be corrected. */
8571 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)
8574 symbol_attribute attr
;
8575 /* The associated variable's type is still the array type
8576 correct this now. */
8577 gfc_typespec
*ts
= &target
->ts
;
8580 for (ref
= target
->ref
; ref
!= NULL
; ref
= ref
->next
)
8585 ts
= &ref
->u
.c
.component
->ts
;
8588 if (ts
->type
== BT_CLASS
)
8589 ts
= &ts
->u
.derived
->components
->ts
;
8595 /* Create a scalar instance of the current class type. Because the
8596 rank of a class array goes into its name, the type has to be
8597 rebuild. The alternative of (re-)setting just the attributes
8598 and as in the current type, destroys the type also in other
8602 sym
->ts
.type
= BT_CLASS
;
8603 attr
= CLASS_DATA (sym
)->attr
;
8605 attr
.associate_var
= 1;
8606 attr
.dimension
= attr
.codimension
= 0;
8607 attr
.class_pointer
= 1;
8608 if (!gfc_build_class_symbol (&sym
->ts
, &attr
, &as
))
8610 /* Make sure the _vptr is set. */
8611 c
= gfc_find_component (sym
->ts
.u
.derived
, "_vptr", true, true, NULL
);
8612 if (c
->ts
.u
.derived
== NULL
)
8613 c
->ts
.u
.derived
= gfc_find_derived_vtab (sym
->ts
.u
.derived
);
8614 CLASS_DATA (sym
)->attr
.pointer
= 1;
8615 CLASS_DATA (sym
)->attr
.class_pointer
= 1;
8616 gfc_set_sym_referenced (sym
->ts
.u
.derived
);
8617 gfc_commit_symbol (sym
->ts
.u
.derived
);
8618 /* _vptr now has the _vtab in it, change it to the _vtype. */
8619 if (c
->ts
.u
.derived
->attr
.vtab
)
8620 c
->ts
.u
.derived
= c
->ts
.u
.derived
->ts
.u
.derived
;
8621 c
->ts
.u
.derived
->ns
->types_resolved
= 0;
8622 resolve_types (c
->ts
.u
.derived
->ns
);
8626 /* Mark this as an associate variable. */
8627 sym
->attr
.associate_var
= 1;
8629 /* Fix up the type-spec for CHARACTER types. */
8630 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.select_type_temporary
)
8633 sym
->ts
.u
.cl
= target
->ts
.u
.cl
;
8635 if (!sym
->ts
.u
.cl
->length
&& !sym
->ts
.deferred
8636 && target
->expr_type
== EXPR_CONSTANT
)
8637 sym
->ts
.u
.cl
->length
8638 = gfc_get_int_expr (gfc_charlen_int_kind
,
8639 NULL
, target
->value
.character
.length
);
8642 /* If the target is a good class object, so is the associate variable. */
8643 if (sym
->ts
.type
== BT_CLASS
&& gfc_expr_attr (target
).class_ok
)
8644 sym
->attr
.class_ok
= 1;
8648 /* Ensure that SELECT TYPE expressions have the correct rank and a full
8649 array reference, where necessary. The symbols are artificial and so
8650 the dimension attribute and arrayspec can also be set. In addition,
8651 sometimes the expr1 arrives as BT_DERIVED, when the symbol is BT_CLASS.
8652 This is corrected here as well.*/
8655 fixup_array_ref (gfc_expr
**expr1
, gfc_expr
*expr2
,
8656 int rank
, gfc_ref
*ref
)
8658 gfc_ref
*nref
= (*expr1
)->ref
;
8659 gfc_symbol
*sym1
= (*expr1
)->symtree
->n
.sym
;
8660 gfc_symbol
*sym2
= expr2
? expr2
->symtree
->n
.sym
: NULL
;
8661 (*expr1
)->rank
= rank
;
8662 if (sym1
->ts
.type
== BT_CLASS
)
8664 if ((*expr1
)->ts
.type
!= BT_CLASS
)
8665 (*expr1
)->ts
= sym1
->ts
;
8667 CLASS_DATA (sym1
)->attr
.dimension
= 1;
8668 if (CLASS_DATA (sym1
)->as
== NULL
&& sym2
)
8669 CLASS_DATA (sym1
)->as
8670 = gfc_copy_array_spec (CLASS_DATA (sym2
)->as
);
8674 sym1
->attr
.dimension
= 1;
8675 if (sym1
->as
== NULL
&& sym2
)
8676 sym1
->as
= gfc_copy_array_spec (sym2
->as
);
8679 for (; nref
; nref
= nref
->next
)
8680 if (nref
->next
== NULL
)
8683 if (ref
&& nref
&& nref
->type
!= REF_ARRAY
)
8684 nref
->next
= gfc_copy_ref (ref
);
8685 else if (ref
&& !nref
)
8686 (*expr1
)->ref
= gfc_copy_ref (ref
);
8691 build_loc_call (gfc_expr
*sym_expr
)
8694 loc_call
= gfc_get_expr ();
8695 loc_call
->expr_type
= EXPR_FUNCTION
;
8696 gfc_get_sym_tree ("loc", gfc_current_ns
, &loc_call
->symtree
, false);
8697 loc_call
->symtree
->n
.sym
->attr
.flavor
= FL_PROCEDURE
;
8698 loc_call
->symtree
->n
.sym
->attr
.intrinsic
= 1;
8699 loc_call
->symtree
->n
.sym
->result
= loc_call
->symtree
->n
.sym
;
8700 gfc_commit_symbol (loc_call
->symtree
->n
.sym
);
8701 loc_call
->ts
.type
= BT_INTEGER
;
8702 loc_call
->ts
.kind
= gfc_index_integer_kind
;
8703 loc_call
->value
.function
.isym
= gfc_intrinsic_function_by_id (GFC_ISYM_LOC
);
8704 loc_call
->value
.function
.actual
= gfc_get_actual_arglist ();
8705 loc_call
->value
.function
.actual
->expr
= sym_expr
;
8706 loc_call
->where
= sym_expr
->where
;
8710 /* Resolve a SELECT TYPE statement. */
8713 resolve_select_type (gfc_code
*code
, gfc_namespace
*old_ns
)
8715 gfc_symbol
*selector_type
;
8716 gfc_code
*body
, *new_st
, *if_st
, *tail
;
8717 gfc_code
*class_is
= NULL
, *default_case
= NULL
;
8720 char name
[GFC_MAX_SYMBOL_LEN
];
8724 gfc_ref
* ref
= NULL
;
8725 gfc_expr
*selector_expr
= NULL
;
8727 ns
= code
->ext
.block
.ns
;
8730 /* Check for F03:C813. */
8731 if (code
->expr1
->ts
.type
!= BT_CLASS
8732 && !(code
->expr2
&& code
->expr2
->ts
.type
== BT_CLASS
))
8734 gfc_error ("Selector shall be polymorphic in SELECT TYPE statement "
8735 "at %L", &code
->loc
);
8739 if (!code
->expr1
->symtree
->n
.sym
->attr
.class_ok
)
8744 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
8745 code
->expr1
->symtree
->n
.sym
->ts
= code
->expr2
->ts
;
8746 selector_type
= CLASS_DATA (code
->expr2
)->ts
.u
.derived
;
8748 if (code
->expr2
->rank
&& CLASS_DATA (code
->expr1
)->as
)
8749 CLASS_DATA (code
->expr1
)->as
->rank
= code
->expr2
->rank
;
8751 /* F2008: C803 The selector expression must not be coindexed. */
8752 if (gfc_is_coindexed (code
->expr2
))
8754 gfc_error ("Selector at %L must not be coindexed",
8755 &code
->expr2
->where
);
8762 selector_type
= CLASS_DATA (code
->expr1
)->ts
.u
.derived
;
8764 if (gfc_is_coindexed (code
->expr1
))
8766 gfc_error ("Selector at %L must not be coindexed",
8767 &code
->expr1
->where
);
8772 /* Loop over TYPE IS / CLASS IS cases. */
8773 for (body
= code
->block
; body
; body
= body
->block
)
8775 c
= body
->ext
.block
.case_list
;
8779 /* Check for repeated cases. */
8780 for (tail
= code
->block
; tail
; tail
= tail
->block
)
8782 gfc_case
*d
= tail
->ext
.block
.case_list
;
8786 if (c
->ts
.type
== d
->ts
.type
8787 && ((c
->ts
.type
== BT_DERIVED
8788 && c
->ts
.u
.derived
&& d
->ts
.u
.derived
8789 && !strcmp (c
->ts
.u
.derived
->name
,
8790 d
->ts
.u
.derived
->name
))
8791 || c
->ts
.type
== BT_UNKNOWN
8792 || (!(c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8793 && c
->ts
.kind
== d
->ts
.kind
)))
8795 gfc_error ("TYPE IS at %L overlaps with TYPE IS at %L",
8796 &c
->where
, &d
->where
);
8802 /* Check F03:C815. */
8803 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8804 && !selector_type
->attr
.unlimited_polymorphic
8805 && !gfc_type_is_extensible (c
->ts
.u
.derived
))
8807 gfc_error ("Derived type %qs at %L must be extensible",
8808 c
->ts
.u
.derived
->name
, &c
->where
);
8813 /* Check F03:C816. */
8814 if (c
->ts
.type
!= BT_UNKNOWN
&& !selector_type
->attr
.unlimited_polymorphic
8815 && ((c
->ts
.type
!= BT_DERIVED
&& c
->ts
.type
!= BT_CLASS
)
8816 || !gfc_type_is_extension_of (selector_type
, c
->ts
.u
.derived
)))
8818 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8819 gfc_error ("Derived type %qs at %L must be an extension of %qs",
8820 c
->ts
.u
.derived
->name
, &c
->where
, selector_type
->name
);
8822 gfc_error ("Unexpected intrinsic type %qs at %L",
8823 gfc_basic_typename (c
->ts
.type
), &c
->where
);
8828 /* Check F03:C814. */
8829 if (c
->ts
.type
== BT_CHARACTER
8830 && (c
->ts
.u
.cl
->length
!= NULL
|| c
->ts
.deferred
))
8832 gfc_error ("The type-spec at %L shall specify that each length "
8833 "type parameter is assumed", &c
->where
);
8838 /* Intercept the DEFAULT case. */
8839 if (c
->ts
.type
== BT_UNKNOWN
)
8841 /* Check F03:C818. */
8844 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8845 "by a second DEFAULT CASE at %L",
8846 &default_case
->ext
.block
.case_list
->where
, &c
->where
);
8851 default_case
= body
;
8858 /* Transform SELECT TYPE statement to BLOCK and associate selector to
8859 target if present. If there are any EXIT statements referring to the
8860 SELECT TYPE construct, this is no problem because the gfc_code
8861 reference stays the same and EXIT is equally possible from the BLOCK
8862 it is changed to. */
8863 code
->op
= EXEC_BLOCK
;
8866 gfc_association_list
* assoc
;
8868 assoc
= gfc_get_association_list ();
8869 assoc
->st
= code
->expr1
->symtree
;
8870 assoc
->target
= gfc_copy_expr (code
->expr2
);
8871 assoc
->target
->where
= code
->expr2
->where
;
8872 /* assoc->variable will be set by resolve_assoc_var. */
8874 code
->ext
.block
.assoc
= assoc
;
8875 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
8877 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
8880 code
->ext
.block
.assoc
= NULL
;
8882 /* Ensure that the selector rank and arrayspec are available to
8883 correct expressions in which they might be missing. */
8884 if (code
->expr2
&& code
->expr2
->rank
)
8886 rank
= code
->expr2
->rank
;
8887 for (ref
= code
->expr2
->ref
; ref
; ref
= ref
->next
)
8888 if (ref
->next
== NULL
)
8890 if (ref
&& ref
->type
== REF_ARRAY
)
8891 ref
= gfc_copy_ref (ref
);
8893 /* Fixup expr1 if necessary. */
8895 fixup_array_ref (&code
->expr1
, code
->expr2
, rank
, ref
);
8897 else if (code
->expr1
->rank
)
8899 rank
= code
->expr1
->rank
;
8900 for (ref
= code
->expr1
->ref
; ref
; ref
= ref
->next
)
8901 if (ref
->next
== NULL
)
8903 if (ref
&& ref
->type
== REF_ARRAY
)
8904 ref
= gfc_copy_ref (ref
);
8907 /* Add EXEC_SELECT to switch on type. */
8908 new_st
= gfc_get_code (code
->op
);
8909 new_st
->expr1
= code
->expr1
;
8910 new_st
->expr2
= code
->expr2
;
8911 new_st
->block
= code
->block
;
8912 code
->expr1
= code
->expr2
= NULL
;
8917 ns
->code
->next
= new_st
;
8919 code
->op
= EXEC_SELECT_TYPE
;
8921 /* Use the intrinsic LOC function to generate an integer expression
8922 for the vtable of the selector. Note that the rank of the selector
8923 expression has to be set to zero. */
8924 gfc_add_vptr_component (code
->expr1
);
8925 code
->expr1
->rank
= 0;
8926 code
->expr1
= build_loc_call (code
->expr1
);
8927 selector_expr
= code
->expr1
->value
.function
.actual
->expr
;
8929 /* Loop over TYPE IS / CLASS IS cases. */
8930 for (body
= code
->block
; body
; body
= body
->block
)
8934 c
= body
->ext
.block
.case_list
;
8936 /* Generate an index integer expression for address of the
8937 TYPE/CLASS vtable and store it in c->low. The hash expression
8938 is stored in c->high and is used to resolve intrinsic cases. */
8939 if (c
->ts
.type
!= BT_UNKNOWN
)
8941 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8943 vtab
= gfc_find_derived_vtab (c
->ts
.u
.derived
);
8945 c
->high
= gfc_get_int_expr (gfc_default_integer_kind
, NULL
,
8946 c
->ts
.u
.derived
->hash_value
);
8950 vtab
= gfc_find_vtab (&c
->ts
);
8951 gcc_assert (vtab
&& CLASS_DATA (vtab
)->initializer
);
8952 e
= CLASS_DATA (vtab
)->initializer
;
8953 c
->high
= gfc_copy_expr (e
);
8956 e
= gfc_lval_expr_from_sym (vtab
);
8957 c
->low
= build_loc_call (e
);
8962 /* Associate temporary to selector. This should only be done
8963 when this case is actually true, so build a new ASSOCIATE
8964 that does precisely this here (instead of using the
8967 if (c
->ts
.type
== BT_CLASS
)
8968 sprintf (name
, "__tmp_class_%s", c
->ts
.u
.derived
->name
);
8969 else if (c
->ts
.type
== BT_DERIVED
)
8970 sprintf (name
, "__tmp_type_%s", c
->ts
.u
.derived
->name
);
8971 else if (c
->ts
.type
== BT_CHARACTER
)
8973 HOST_WIDE_INT charlen
= 0;
8974 if (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
8975 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
8976 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
8977 snprintf (name
, sizeof (name
),
8978 "__tmp_%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
8979 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
8982 sprintf (name
, "__tmp_%s_%d", gfc_basic_typename (c
->ts
.type
),
8985 st
= gfc_find_symtree (ns
->sym_root
, name
);
8986 gcc_assert (st
->n
.sym
->assoc
);
8987 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
8988 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
8989 if (c
->ts
.type
!= BT_CLASS
&& c
->ts
.type
!= BT_UNKNOWN
)
8991 gfc_add_data_component (st
->n
.sym
->assoc
->target
);
8992 /* Fixup the target expression if necessary. */
8994 fixup_array_ref (&st
->n
.sym
->assoc
->target
, NULL
, rank
, ref
);
8997 new_st
= gfc_get_code (EXEC_BLOCK
);
8998 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
8999 new_st
->ext
.block
.ns
->code
= body
->next
;
9000 body
->next
= new_st
;
9002 /* Chain in the new list only if it is marked as dangling. Otherwise
9003 there is a CASE label overlap and this is already used. Just ignore,
9004 the error is diagnosed elsewhere. */
9005 if (st
->n
.sym
->assoc
->dangling
)
9007 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9008 st
->n
.sym
->assoc
->dangling
= 0;
9011 resolve_assoc_var (st
->n
.sym
, false);
9014 /* Take out CLASS IS cases for separate treatment. */
9016 while (body
&& body
->block
)
9018 if (body
->block
->ext
.block
.case_list
->ts
.type
== BT_CLASS
)
9020 /* Add to class_is list. */
9021 if (class_is
== NULL
)
9023 class_is
= body
->block
;
9028 for (tail
= class_is
; tail
->block
; tail
= tail
->block
) ;
9029 tail
->block
= body
->block
;
9032 /* Remove from EXEC_SELECT list. */
9033 body
->block
= body
->block
->block
;
9046 /* Add a default case to hold the CLASS IS cases. */
9047 for (tail
= code
; tail
->block
; tail
= tail
->block
) ;
9048 tail
->block
= gfc_get_code (EXEC_SELECT_TYPE
);
9050 tail
->ext
.block
.case_list
= gfc_get_case ();
9051 tail
->ext
.block
.case_list
->ts
.type
= BT_UNKNOWN
;
9053 default_case
= tail
;
9056 /* More than one CLASS IS block? */
9057 if (class_is
->block
)
9061 /* Sort CLASS IS blocks by extension level. */
9065 for (c1
= &class_is
; (*c1
) && (*c1
)->block
; c1
= &((*c1
)->block
))
9068 /* F03:C817 (check for doubles). */
9069 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->hash_value
9070 == c2
->ext
.block
.case_list
->ts
.u
.derived
->hash_value
)
9072 gfc_error ("Double CLASS IS block in SELECT TYPE "
9074 &c2
->ext
.block
.case_list
->where
);
9077 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
9078 < c2
->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
)
9081 (*c1
)->block
= c2
->block
;
9091 /* Generate IF chain. */
9092 if_st
= gfc_get_code (EXEC_IF
);
9094 for (body
= class_is
; body
; body
= body
->block
)
9096 new_st
->block
= gfc_get_code (EXEC_IF
);
9097 new_st
= new_st
->block
;
9098 /* Set up IF condition: Call _gfortran_is_extension_of. */
9099 new_st
->expr1
= gfc_get_expr ();
9100 new_st
->expr1
->expr_type
= EXPR_FUNCTION
;
9101 new_st
->expr1
->ts
.type
= BT_LOGICAL
;
9102 new_st
->expr1
->ts
.kind
= 4;
9103 new_st
->expr1
->value
.function
.name
= gfc_get_string (PREFIX ("is_extension_of"));
9104 new_st
->expr1
->value
.function
.isym
= XCNEW (gfc_intrinsic_sym
);
9105 new_st
->expr1
->value
.function
.isym
->id
= GFC_ISYM_EXTENDS_TYPE_OF
;
9106 /* Set up arguments. */
9107 new_st
->expr1
->value
.function
.actual
= gfc_get_actual_arglist ();
9108 new_st
->expr1
->value
.function
.actual
->expr
= gfc_get_variable_expr (selector_expr
->symtree
);
9109 new_st
->expr1
->value
.function
.actual
->expr
->where
= code
->loc
;
9110 new_st
->expr1
->where
= code
->loc
;
9111 gfc_add_vptr_component (new_st
->expr1
->value
.function
.actual
->expr
);
9112 vtab
= gfc_find_derived_vtab (body
->ext
.block
.case_list
->ts
.u
.derived
);
9113 st
= gfc_find_symtree (vtab
->ns
->sym_root
, vtab
->name
);
9114 new_st
->expr1
->value
.function
.actual
->next
= gfc_get_actual_arglist ();
9115 new_st
->expr1
->value
.function
.actual
->next
->expr
= gfc_get_variable_expr (st
);
9116 new_st
->expr1
->value
.function
.actual
->next
->expr
->where
= code
->loc
;
9117 new_st
->next
= body
->next
;
9119 if (default_case
->next
)
9121 new_st
->block
= gfc_get_code (EXEC_IF
);
9122 new_st
= new_st
->block
;
9123 new_st
->next
= default_case
->next
;
9126 /* Replace CLASS DEFAULT code by the IF chain. */
9127 default_case
->next
= if_st
;
9130 /* Resolve the internal code. This can not be done earlier because
9131 it requires that the sym->assoc of selectors is set already. */
9132 gfc_current_ns
= ns
;
9133 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9134 gfc_current_ns
= old_ns
;
9141 /* Resolve a transfer statement. This is making sure that:
9142 -- a derived type being transferred has only non-pointer components
9143 -- a derived type being transferred doesn't have private components, unless
9144 it's being transferred from the module where the type was defined
9145 -- we're not trying to transfer a whole assumed size array. */
9148 resolve_transfer (gfc_code
*code
)
9151 gfc_symbol
*sym
, *derived
;
9155 bool formatted
= false;
9156 gfc_dt
*dt
= code
->ext
.dt
;
9157 gfc_symbol
*dtio_sub
= NULL
;
9161 while (exp
!= NULL
&& exp
->expr_type
== EXPR_OP
9162 && exp
->value
.op
.op
== INTRINSIC_PARENTHESES
)
9163 exp
= exp
->value
.op
.op1
;
9165 if (exp
&& exp
->expr_type
== EXPR_NULL
9168 gfc_error ("Invalid context for NULL () intrinsic at %L",
9173 if (exp
== NULL
|| (exp
->expr_type
!= EXPR_VARIABLE
9174 && exp
->expr_type
!= EXPR_FUNCTION
9175 && exp
->expr_type
!= EXPR_STRUCTURE
))
9178 /* If we are reading, the variable will be changed. Note that
9179 code->ext.dt may be NULL if the TRANSFER is related to
9180 an INQUIRE statement -- but in this case, we are not reading, either. */
9181 if (dt
&& dt
->dt_io_kind
->value
.iokind
== M_READ
9182 && !gfc_check_vardef_context (exp
, false, false, false,
9186 ts
= exp
->expr_type
== EXPR_STRUCTURE
? &exp
->ts
: &exp
->symtree
->n
.sym
->ts
;
9188 /* Go to actual component transferred. */
9189 for (ref
= exp
->ref
; ref
; ref
= ref
->next
)
9190 if (ref
->type
== REF_COMPONENT
)
9191 ts
= &ref
->u
.c
.component
->ts
;
9193 if (dt
&& dt
->dt_io_kind
->value
.iokind
!= M_INQUIRE
9194 && (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
))
9196 if (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
)
9197 derived
= ts
->u
.derived
;
9199 derived
= ts
->u
.derived
->components
->ts
.u
.derived
;
9201 if (dt
->format_expr
)
9204 fmt
= gfc_widechar_to_char (dt
->format_expr
->value
.character
.string
,
9206 if (strtok (fmt
, "DT") != NULL
)
9209 else if (dt
->format_label
== &format_asterisk
)
9211 /* List directed io must call the formatted DTIO procedure. */
9215 write
= dt
->dt_io_kind
->value
.iokind
== M_WRITE
9216 || dt
->dt_io_kind
->value
.iokind
== M_PRINT
;
9217 dtio_sub
= gfc_find_specific_dtio_proc (derived
, write
, formatted
);
9219 if (dtio_sub
!= NULL
&& exp
->expr_type
== EXPR_VARIABLE
)
9222 sym
= exp
->symtree
->n
.sym
->ns
->proc_name
;
9223 /* Check to see if this is a nested DTIO call, with the
9224 dummy as the io-list object. */
9225 if (sym
&& sym
== dtio_sub
&& sym
->formal
9226 && sym
->formal
->sym
== exp
->symtree
->n
.sym
9227 && exp
->ref
== NULL
)
9229 if (!sym
->attr
.recursive
)
9231 gfc_error ("DTIO %s procedure at %L must be recursive",
9232 sym
->name
, &sym
->declared_at
);
9239 if (ts
->type
== BT_CLASS
&& dtio_sub
== NULL
)
9241 gfc_error ("Data transfer element at %L cannot be polymorphic unless "
9242 "it is processed by a defined input/output procedure",
9247 if (ts
->type
== BT_DERIVED
)
9249 /* Check that transferred derived type doesn't contain POINTER
9250 components unless it is processed by a defined input/output
9252 if (ts
->u
.derived
->attr
.pointer_comp
&& dtio_sub
== NULL
)
9254 gfc_error ("Data transfer element at %L cannot have POINTER "
9255 "components unless it is processed by a defined "
9256 "input/output procedure", &code
->loc
);
9261 if (ts
->u
.derived
->attr
.proc_pointer_comp
)
9263 gfc_error ("Data transfer element at %L cannot have "
9264 "procedure pointer components", &code
->loc
);
9268 if (ts
->u
.derived
->attr
.alloc_comp
&& dtio_sub
== NULL
)
9270 gfc_error ("Data transfer element at %L cannot have ALLOCATABLE "
9271 "components unless it is processed by a defined "
9272 "input/output procedure", &code
->loc
);
9276 /* C_PTR and C_FUNPTR have private components which means they can not
9277 be printed. However, if -std=gnu and not -pedantic, allow
9278 the component to be printed to help debugging. */
9279 if (ts
->u
.derived
->ts
.f90_type
== BT_VOID
)
9281 if (!gfc_notify_std (GFC_STD_GNU
, "Data transfer element at %L "
9282 "cannot have PRIVATE components", &code
->loc
))
9285 else if (derived_inaccessible (ts
->u
.derived
) && dtio_sub
== NULL
)
9287 gfc_error ("Data transfer element at %L cannot have "
9288 "PRIVATE components unless it is processed by "
9289 "a defined input/output procedure", &code
->loc
);
9294 if (exp
->expr_type
== EXPR_STRUCTURE
)
9297 sym
= exp
->symtree
->n
.sym
;
9299 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SIZE
&& exp
->ref
9300 && exp
->ref
->type
== REF_ARRAY
&& exp
->ref
->u
.ar
.type
== AR_FULL
)
9302 gfc_error ("Data transfer element at %L cannot be a full reference to "
9303 "an assumed-size array", &code
->loc
);
9307 if (async_io_dt
&& exp
->expr_type
== EXPR_VARIABLE
)
9308 exp
->symtree
->n
.sym
->attr
.asynchronous
= 1;
9312 /*********** Toplevel code resolution subroutines ***********/
9314 /* Find the set of labels that are reachable from this block. We also
9315 record the last statement in each block. */
9318 find_reachable_labels (gfc_code
*block
)
9325 cs_base
->reachable_labels
= bitmap_alloc (&labels_obstack
);
9327 /* Collect labels in this block. We don't keep those corresponding
9328 to END {IF|SELECT}, these are checked in resolve_branch by going
9329 up through the code_stack. */
9330 for (c
= block
; c
; c
= c
->next
)
9332 if (c
->here
&& c
->op
!= EXEC_END_NESTED_BLOCK
)
9333 bitmap_set_bit (cs_base
->reachable_labels
, c
->here
->value
);
9336 /* Merge with labels from parent block. */
9339 gcc_assert (cs_base
->prev
->reachable_labels
);
9340 bitmap_ior_into (cs_base
->reachable_labels
,
9341 cs_base
->prev
->reachable_labels
);
9347 resolve_lock_unlock_event (gfc_code
*code
)
9349 if (code
->expr1
->expr_type
== EXPR_FUNCTION
9350 && code
->expr1
->value
.function
.isym
9351 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
9352 remove_caf_get_intrinsic (code
->expr1
);
9354 if ((code
->op
== EXEC_LOCK
|| code
->op
== EXEC_UNLOCK
)
9355 && (code
->expr1
->ts
.type
!= BT_DERIVED
9356 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9357 || code
->expr1
->ts
.u
.derived
->from_intmod
!= INTMOD_ISO_FORTRAN_ENV
9358 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
!= ISOFORTRAN_LOCK_TYPE
9359 || code
->expr1
->rank
!= 0
9360 || (!gfc_is_coarray (code
->expr1
) &&
9361 !gfc_is_coindexed (code
->expr1
))))
9362 gfc_error ("Lock variable at %L must be a scalar of type LOCK_TYPE",
9363 &code
->expr1
->where
);
9364 else if ((code
->op
== EXEC_EVENT_POST
|| code
->op
== EXEC_EVENT_WAIT
)
9365 && (code
->expr1
->ts
.type
!= BT_DERIVED
9366 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9367 || code
->expr1
->ts
.u
.derived
->from_intmod
9368 != INTMOD_ISO_FORTRAN_ENV
9369 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
9370 != ISOFORTRAN_EVENT_TYPE
9371 || code
->expr1
->rank
!= 0))
9372 gfc_error ("Event variable at %L must be a scalar of type EVENT_TYPE",
9373 &code
->expr1
->where
);
9374 else if (code
->op
== EXEC_EVENT_POST
&& !gfc_is_coarray (code
->expr1
)
9375 && !gfc_is_coindexed (code
->expr1
))
9376 gfc_error ("Event variable argument at %L must be a coarray or coindexed",
9377 &code
->expr1
->where
);
9378 else if (code
->op
== EXEC_EVENT_WAIT
&& !gfc_is_coarray (code
->expr1
))
9379 gfc_error ("Event variable argument at %L must be a coarray but not "
9380 "coindexed", &code
->expr1
->where
);
9384 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9385 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9386 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9387 &code
->expr2
->where
);
9390 && !gfc_check_vardef_context (code
->expr2
, false, false, false,
9391 _("STAT variable")))
9396 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9397 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9398 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9399 &code
->expr3
->where
);
9402 && !gfc_check_vardef_context (code
->expr3
, false, false, false,
9403 _("ERRMSG variable")))
9406 /* Check for LOCK the ACQUIRED_LOCK. */
9407 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9408 && (code
->expr4
->ts
.type
!= BT_LOGICAL
|| code
->expr4
->rank
!= 0
9409 || code
->expr4
->expr_type
!= EXPR_VARIABLE
))
9410 gfc_error ("ACQUIRED_LOCK= argument at %L must be a scalar LOGICAL "
9411 "variable", &code
->expr4
->where
);
9413 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9414 && !gfc_check_vardef_context (code
->expr4
, false, false, false,
9415 _("ACQUIRED_LOCK variable")))
9418 /* Check for EVENT WAIT the UNTIL_COUNT. */
9419 if (code
->op
== EXEC_EVENT_WAIT
&& code
->expr4
)
9421 if (!gfc_resolve_expr (code
->expr4
) || code
->expr4
->ts
.type
!= BT_INTEGER
9422 || code
->expr4
->rank
!= 0)
9423 gfc_error ("UNTIL_COUNT= argument at %L must be a scalar INTEGER "
9424 "expression", &code
->expr4
->where
);
9430 resolve_critical (gfc_code
*code
)
9432 gfc_symtree
*symtree
;
9433 gfc_symbol
*lock_type
;
9434 char name
[GFC_MAX_SYMBOL_LEN
];
9435 static int serial
= 0;
9437 if (flag_coarray
!= GFC_FCOARRAY_LIB
)
9440 symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
9441 GFC_PREFIX ("lock_type"));
9443 lock_type
= symtree
->n
.sym
;
9446 if (gfc_get_sym_tree (GFC_PREFIX ("lock_type"), gfc_current_ns
, &symtree
,
9449 lock_type
= symtree
->n
.sym
;
9450 lock_type
->attr
.flavor
= FL_DERIVED
;
9451 lock_type
->attr
.zero_comp
= 1;
9452 lock_type
->from_intmod
= INTMOD_ISO_FORTRAN_ENV
;
9453 lock_type
->intmod_sym_id
= ISOFORTRAN_LOCK_TYPE
;
9456 sprintf(name
, GFC_PREFIX ("lock_var") "%d",serial
++);
9457 if (gfc_get_sym_tree (name
, gfc_current_ns
, &symtree
, false) != 0)
9460 code
->resolved_sym
= symtree
->n
.sym
;
9461 symtree
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
9462 symtree
->n
.sym
->attr
.referenced
= 1;
9463 symtree
->n
.sym
->attr
.artificial
= 1;
9464 symtree
->n
.sym
->attr
.codimension
= 1;
9465 symtree
->n
.sym
->ts
.type
= BT_DERIVED
;
9466 symtree
->n
.sym
->ts
.u
.derived
= lock_type
;
9467 symtree
->n
.sym
->as
= gfc_get_array_spec ();
9468 symtree
->n
.sym
->as
->corank
= 1;
9469 symtree
->n
.sym
->as
->type
= AS_EXPLICIT
;
9470 symtree
->n
.sym
->as
->cotype
= AS_EXPLICIT
;
9471 symtree
->n
.sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
,
9473 gfc_commit_symbols();
9478 resolve_sync (gfc_code
*code
)
9480 /* Check imageset. The * case matches expr1 == NULL. */
9483 if (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
> 1)
9484 gfc_error ("Imageset argument at %L must be a scalar or rank-1 "
9485 "INTEGER expression", &code
->expr1
->where
);
9486 if (code
->expr1
->expr_type
== EXPR_CONSTANT
&& code
->expr1
->rank
== 0
9487 && mpz_cmp_si (code
->expr1
->value
.integer
, 1) < 0)
9488 gfc_error ("Imageset argument at %L must between 1 and num_images()",
9489 &code
->expr1
->where
);
9490 else if (code
->expr1
->expr_type
== EXPR_ARRAY
9491 && gfc_simplify_expr (code
->expr1
, 0))
9493 gfc_constructor
*cons
;
9494 cons
= gfc_constructor_first (code
->expr1
->value
.constructor
);
9495 for (; cons
; cons
= gfc_constructor_next (cons
))
9496 if (cons
->expr
->expr_type
== EXPR_CONSTANT
9497 && mpz_cmp_si (cons
->expr
->value
.integer
, 1) < 0)
9498 gfc_error ("Imageset argument at %L must between 1 and "
9499 "num_images()", &cons
->expr
->where
);
9505 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9506 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9507 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9508 &code
->expr2
->where
);
9512 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9513 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9514 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9515 &code
->expr3
->where
);
9519 /* Given a branch to a label, see if the branch is conforming.
9520 The code node describes where the branch is located. */
9523 resolve_branch (gfc_st_label
*label
, gfc_code
*code
)
9530 /* Step one: is this a valid branching target? */
9532 if (label
->defined
== ST_LABEL_UNKNOWN
)
9534 gfc_error ("Label %d referenced at %L is never defined", label
->value
,
9539 if (label
->defined
!= ST_LABEL_TARGET
&& label
->defined
!= ST_LABEL_DO_TARGET
)
9541 gfc_error ("Statement at %L is not a valid branch target statement "
9542 "for the branch statement at %L", &label
->where
, &code
->loc
);
9546 /* Step two: make sure this branch is not a branch to itself ;-) */
9548 if (code
->here
== label
)
9551 "Branch at %L may result in an infinite loop", &code
->loc
);
9555 /* Step three: See if the label is in the same block as the
9556 branching statement. The hard work has been done by setting up
9557 the bitmap reachable_labels. */
9559 if (bitmap_bit_p (cs_base
->reachable_labels
, label
->value
))
9561 /* Check now whether there is a CRITICAL construct; if so, check
9562 whether the label is still visible outside of the CRITICAL block,
9563 which is invalid. */
9564 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9566 if (stack
->current
->op
== EXEC_CRITICAL
9567 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9568 gfc_error ("GOTO statement at %L leaves CRITICAL construct for "
9569 "label at %L", &code
->loc
, &label
->where
);
9570 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
9571 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9572 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct "
9573 "for label at %L", &code
->loc
, &label
->where
);
9579 /* Step four: If we haven't found the label in the bitmap, it may
9580 still be the label of the END of the enclosing block, in which
9581 case we find it by going up the code_stack. */
9583 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9585 if (stack
->current
->next
&& stack
->current
->next
->here
== label
)
9587 if (stack
->current
->op
== EXEC_CRITICAL
)
9589 /* Note: A label at END CRITICAL does not leave the CRITICAL
9590 construct as END CRITICAL is still part of it. */
9591 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
9592 " at %L", &code
->loc
, &label
->where
);
9595 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
)
9597 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct for "
9598 "label at %L", &code
->loc
, &label
->where
);
9605 gcc_assert (stack
->current
->next
->op
== EXEC_END_NESTED_BLOCK
);
9609 /* The label is not in an enclosing block, so illegal. This was
9610 allowed in Fortran 66, so we allow it as extension. No
9611 further checks are necessary in this case. */
9612 gfc_notify_std (GFC_STD_LEGACY
, "Label at %L is not in the same block "
9613 "as the GOTO statement at %L", &label
->where
,
9619 /* Check whether EXPR1 has the same shape as EXPR2. */
9622 resolve_where_shape (gfc_expr
*expr1
, gfc_expr
*expr2
)
9624 mpz_t shape
[GFC_MAX_DIMENSIONS
];
9625 mpz_t shape2
[GFC_MAX_DIMENSIONS
];
9626 bool result
= false;
9629 /* Compare the rank. */
9630 if (expr1
->rank
!= expr2
->rank
)
9633 /* Compare the size of each dimension. */
9634 for (i
=0; i
<expr1
->rank
; i
++)
9636 if (!gfc_array_dimen_size (expr1
, i
, &shape
[i
]))
9639 if (!gfc_array_dimen_size (expr2
, i
, &shape2
[i
]))
9642 if (mpz_cmp (shape
[i
], shape2
[i
]))
9646 /* When either of the two expression is an assumed size array, we
9647 ignore the comparison of dimension sizes. */
9652 gfc_clear_shape (shape
, i
);
9653 gfc_clear_shape (shape2
, i
);
9658 /* Check whether a WHERE assignment target or a WHERE mask expression
9659 has the same shape as the outmost WHERE mask expression. */
9662 resolve_where (gfc_code
*code
, gfc_expr
*mask
)
9668 cblock
= code
->block
;
9670 /* Store the first WHERE mask-expr of the WHERE statement or construct.
9671 In case of nested WHERE, only the outmost one is stored. */
9672 if (mask
== NULL
) /* outmost WHERE */
9674 else /* inner WHERE */
9681 /* Check if the mask-expr has a consistent shape with the
9682 outmost WHERE mask-expr. */
9683 if (!resolve_where_shape (cblock
->expr1
, e
))
9684 gfc_error ("WHERE mask at %L has inconsistent shape",
9685 &cblock
->expr1
->where
);
9688 /* the assignment statement of a WHERE statement, or the first
9689 statement in where-body-construct of a WHERE construct */
9690 cnext
= cblock
->next
;
9695 /* WHERE assignment statement */
9698 /* Check shape consistent for WHERE assignment target. */
9699 if (e
&& !resolve_where_shape (cnext
->expr1
, e
))
9700 gfc_error ("WHERE assignment target at %L has "
9701 "inconsistent shape", &cnext
->expr1
->where
);
9705 case EXEC_ASSIGN_CALL
:
9706 resolve_call (cnext
);
9707 if (!cnext
->resolved_sym
->attr
.elemental
)
9708 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9709 &cnext
->ext
.actual
->expr
->where
);
9712 /* WHERE or WHERE construct is part of a where-body-construct */
9714 resolve_where (cnext
, e
);
9718 gfc_error ("Unsupported statement inside WHERE at %L",
9721 /* the next statement within the same where-body-construct */
9722 cnext
= cnext
->next
;
9724 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
9725 cblock
= cblock
->block
;
9730 /* Resolve assignment in FORALL construct.
9731 NVAR is the number of FORALL index variables, and VAR_EXPR records the
9732 FORALL index variables. */
9735 gfc_resolve_assign_in_forall (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
9739 for (n
= 0; n
< nvar
; n
++)
9741 gfc_symbol
*forall_index
;
9743 forall_index
= var_expr
[n
]->symtree
->n
.sym
;
9745 /* Check whether the assignment target is one of the FORALL index
9747 if ((code
->expr1
->expr_type
== EXPR_VARIABLE
)
9748 && (code
->expr1
->symtree
->n
.sym
== forall_index
))
9749 gfc_error ("Assignment to a FORALL index variable at %L",
9750 &code
->expr1
->where
);
9753 /* If one of the FORALL index variables doesn't appear in the
9754 assignment variable, then there could be a many-to-one
9755 assignment. Emit a warning rather than an error because the
9756 mask could be resolving this problem. */
9757 if (!find_forall_index (code
->expr1
, forall_index
, 0))
9758 gfc_warning (0, "The FORALL with index %qs is not used on the "
9759 "left side of the assignment at %L and so might "
9760 "cause multiple assignment to this object",
9761 var_expr
[n
]->symtree
->name
, &code
->expr1
->where
);
9767 /* Resolve WHERE statement in FORALL construct. */
9770 gfc_resolve_where_code_in_forall (gfc_code
*code
, int nvar
,
9771 gfc_expr
**var_expr
)
9776 cblock
= code
->block
;
9779 /* the assignment statement of a WHERE statement, or the first
9780 statement in where-body-construct of a WHERE construct */
9781 cnext
= cblock
->next
;
9786 /* WHERE assignment statement */
9788 gfc_resolve_assign_in_forall (cnext
, nvar
, var_expr
);
9791 /* WHERE operator assignment statement */
9792 case EXEC_ASSIGN_CALL
:
9793 resolve_call (cnext
);
9794 if (!cnext
->resolved_sym
->attr
.elemental
)
9795 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9796 &cnext
->ext
.actual
->expr
->where
);
9799 /* WHERE or WHERE construct is part of a where-body-construct */
9801 gfc_resolve_where_code_in_forall (cnext
, nvar
, var_expr
);
9805 gfc_error ("Unsupported statement inside WHERE at %L",
9808 /* the next statement within the same where-body-construct */
9809 cnext
= cnext
->next
;
9811 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
9812 cblock
= cblock
->block
;
9817 /* Traverse the FORALL body to check whether the following errors exist:
9818 1. For assignment, check if a many-to-one assignment happens.
9819 2. For WHERE statement, check the WHERE body to see if there is any
9820 many-to-one assignment. */
9823 gfc_resolve_forall_body (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
9827 c
= code
->block
->next
;
9833 case EXEC_POINTER_ASSIGN
:
9834 gfc_resolve_assign_in_forall (c
, nvar
, var_expr
);
9837 case EXEC_ASSIGN_CALL
:
9841 /* Because the gfc_resolve_blocks() will handle the nested FORALL,
9842 there is no need to handle it here. */
9846 gfc_resolve_where_code_in_forall(c
, nvar
, var_expr
);
9851 /* The next statement in the FORALL body. */
9857 /* Counts the number of iterators needed inside a forall construct, including
9858 nested forall constructs. This is used to allocate the needed memory
9859 in gfc_resolve_forall. */
9862 gfc_count_forall_iterators (gfc_code
*code
)
9864 int max_iters
, sub_iters
, current_iters
;
9865 gfc_forall_iterator
*fa
;
9867 gcc_assert(code
->op
== EXEC_FORALL
);
9871 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
9874 code
= code
->block
->next
;
9878 if (code
->op
== EXEC_FORALL
)
9880 sub_iters
= gfc_count_forall_iterators (code
);
9881 if (sub_iters
> max_iters
)
9882 max_iters
= sub_iters
;
9887 return current_iters
+ max_iters
;
9891 /* Given a FORALL construct, first resolve the FORALL iterator, then call
9892 gfc_resolve_forall_body to resolve the FORALL body. */
9895 gfc_resolve_forall (gfc_code
*code
, gfc_namespace
*ns
, int forall_save
)
9897 static gfc_expr
**var_expr
;
9898 static int total_var
= 0;
9899 static int nvar
= 0;
9900 int i
, old_nvar
, tmp
;
9901 gfc_forall_iterator
*fa
;
9905 /* Start to resolve a FORALL construct */
9906 if (forall_save
== 0)
9908 /* Count the total number of FORALL indices in the nested FORALL
9909 construct in order to allocate the VAR_EXPR with proper size. */
9910 total_var
= gfc_count_forall_iterators (code
);
9912 /* Allocate VAR_EXPR with NUMBER_OF_FORALL_INDEX elements. */
9913 var_expr
= XCNEWVEC (gfc_expr
*, total_var
);
9916 /* The information about FORALL iterator, including FORALL indices start, end
9917 and stride. An outer FORALL indice cannot appear in start, end or stride. */
9918 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
9920 /* Fortran 20008: C738 (R753). */
9921 if (fa
->var
->ref
&& fa
->var
->ref
->type
== REF_ARRAY
)
9923 gfc_error ("FORALL index-name at %L must be a scalar variable "
9924 "of type integer", &fa
->var
->where
);
9928 /* Check if any outer FORALL index name is the same as the current
9930 for (i
= 0; i
< nvar
; i
++)
9932 if (fa
->var
->symtree
->n
.sym
== var_expr
[i
]->symtree
->n
.sym
)
9933 gfc_error ("An outer FORALL construct already has an index "
9934 "with this name %L", &fa
->var
->where
);
9937 /* Record the current FORALL index. */
9938 var_expr
[nvar
] = gfc_copy_expr (fa
->var
);
9942 /* No memory leak. */
9943 gcc_assert (nvar
<= total_var
);
9946 /* Resolve the FORALL body. */
9947 gfc_resolve_forall_body (code
, nvar
, var_expr
);
9949 /* May call gfc_resolve_forall to resolve the inner FORALL loop. */
9950 gfc_resolve_blocks (code
->block
, ns
);
9954 /* Free only the VAR_EXPRs allocated in this frame. */
9955 for (i
= nvar
; i
< tmp
; i
++)
9956 gfc_free_expr (var_expr
[i
]);
9960 /* We are in the outermost FORALL construct. */
9961 gcc_assert (forall_save
== 0);
9963 /* VAR_EXPR is not needed any more. */
9970 /* Resolve a BLOCK construct statement. */
9973 resolve_block_construct (gfc_code
* code
)
9975 /* Resolve the BLOCK's namespace. */
9976 gfc_resolve (code
->ext
.block
.ns
);
9978 /* For an ASSOCIATE block, the associations (and their targets) are already
9979 resolved during resolve_symbol. */
9983 /* Resolve lists of blocks found in IF, SELECT CASE, WHERE, FORALL, GOTO and
9987 gfc_resolve_blocks (gfc_code
*b
, gfc_namespace
*ns
)
9991 for (; b
; b
= b
->block
)
9993 t
= gfc_resolve_expr (b
->expr1
);
9994 if (!gfc_resolve_expr (b
->expr2
))
10000 if (t
&& b
->expr1
!= NULL
10001 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
!= 0))
10002 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
10008 && b
->expr1
!= NULL
10009 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
== 0))
10010 gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
10015 resolve_branch (b
->label1
, b
);
10019 resolve_block_construct (b
);
10023 case EXEC_SELECT_TYPE
:
10026 case EXEC_DO_WHILE
:
10027 case EXEC_DO_CONCURRENT
:
10028 case EXEC_CRITICAL
:
10031 case EXEC_IOLENGTH
:
10035 case EXEC_OMP_ATOMIC
:
10036 case EXEC_OACC_ATOMIC
:
10038 gfc_omp_atomic_op aop
10039 = (gfc_omp_atomic_op
) (b
->ext
.omp_atomic
& GFC_OMP_ATOMIC_MASK
);
10041 /* Verify this before calling gfc_resolve_code, which might
10043 gcc_assert (b
->next
&& b
->next
->op
== EXEC_ASSIGN
);
10044 gcc_assert (((aop
!= GFC_OMP_ATOMIC_CAPTURE
)
10045 && b
->next
->next
== NULL
)
10046 || ((aop
== GFC_OMP_ATOMIC_CAPTURE
)
10047 && b
->next
->next
!= NULL
10048 && b
->next
->next
->op
== EXEC_ASSIGN
10049 && b
->next
->next
->next
== NULL
));
10053 case EXEC_OACC_PARALLEL_LOOP
:
10054 case EXEC_OACC_PARALLEL
:
10055 case EXEC_OACC_KERNELS_LOOP
:
10056 case EXEC_OACC_KERNELS
:
10057 case EXEC_OACC_DATA
:
10058 case EXEC_OACC_HOST_DATA
:
10059 case EXEC_OACC_LOOP
:
10060 case EXEC_OACC_UPDATE
:
10061 case EXEC_OACC_WAIT
:
10062 case EXEC_OACC_CACHE
:
10063 case EXEC_OACC_ENTER_DATA
:
10064 case EXEC_OACC_EXIT_DATA
:
10065 case EXEC_OACC_ROUTINE
:
10066 case EXEC_OMP_CRITICAL
:
10067 case EXEC_OMP_DISTRIBUTE
:
10068 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
10069 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
10070 case EXEC_OMP_DISTRIBUTE_SIMD
:
10072 case EXEC_OMP_DO_SIMD
:
10073 case EXEC_OMP_MASTER
:
10074 case EXEC_OMP_ORDERED
:
10075 case EXEC_OMP_PARALLEL
:
10076 case EXEC_OMP_PARALLEL_DO
:
10077 case EXEC_OMP_PARALLEL_DO_SIMD
:
10078 case EXEC_OMP_PARALLEL_SECTIONS
:
10079 case EXEC_OMP_PARALLEL_WORKSHARE
:
10080 case EXEC_OMP_SECTIONS
:
10081 case EXEC_OMP_SIMD
:
10082 case EXEC_OMP_SINGLE
:
10083 case EXEC_OMP_TARGET
:
10084 case EXEC_OMP_TARGET_DATA
:
10085 case EXEC_OMP_TARGET_ENTER_DATA
:
10086 case EXEC_OMP_TARGET_EXIT_DATA
:
10087 case EXEC_OMP_TARGET_PARALLEL
:
10088 case EXEC_OMP_TARGET_PARALLEL_DO
:
10089 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
10090 case EXEC_OMP_TARGET_SIMD
:
10091 case EXEC_OMP_TARGET_TEAMS
:
10092 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
10093 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10094 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10095 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
10096 case EXEC_OMP_TARGET_UPDATE
:
10097 case EXEC_OMP_TASK
:
10098 case EXEC_OMP_TASKGROUP
:
10099 case EXEC_OMP_TASKLOOP
:
10100 case EXEC_OMP_TASKLOOP_SIMD
:
10101 case EXEC_OMP_TASKWAIT
:
10102 case EXEC_OMP_TASKYIELD
:
10103 case EXEC_OMP_TEAMS
:
10104 case EXEC_OMP_TEAMS_DISTRIBUTE
:
10105 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10106 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10107 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
10108 case EXEC_OMP_WORKSHARE
:
10112 gfc_internal_error ("gfc_resolve_blocks(): Bad block type");
10115 gfc_resolve_code (b
->next
, ns
);
10120 /* Does everything to resolve an ordinary assignment. Returns true
10121 if this is an interface assignment. */
10123 resolve_ordinary_assign (gfc_code
*code
, gfc_namespace
*ns
)
10132 symbol_attribute attr
;
10134 if (gfc_extend_assign (code
, ns
))
10138 if (code
->op
== EXEC_ASSIGN_CALL
)
10140 lhs
= code
->ext
.actual
->expr
;
10141 rhsptr
= &code
->ext
.actual
->next
->expr
;
10145 gfc_actual_arglist
* args
;
10146 gfc_typebound_proc
* tbp
;
10148 gcc_assert (code
->op
== EXEC_COMPCALL
);
10150 args
= code
->expr1
->value
.compcall
.actual
;
10152 rhsptr
= &args
->next
->expr
;
10154 tbp
= code
->expr1
->value
.compcall
.tbp
;
10155 gcc_assert (!tbp
->is_generic
);
10158 /* Make a temporary rhs when there is a default initializer
10159 and rhs is the same symbol as the lhs. */
10160 if ((*rhsptr
)->expr_type
== EXPR_VARIABLE
10161 && (*rhsptr
)->symtree
->n
.sym
->ts
.type
== BT_DERIVED
10162 && gfc_has_default_initializer ((*rhsptr
)->symtree
->n
.sym
->ts
.u
.derived
)
10163 && (lhs
->symtree
->n
.sym
== (*rhsptr
)->symtree
->n
.sym
))
10164 *rhsptr
= gfc_get_parentheses (*rhsptr
);
10173 && !gfc_notify_std (GFC_STD_GNU
, "BOZ literal at %L outside "
10174 "a DATA statement and outside INT/REAL/DBLE/CMPLX",
10178 /* Handle the case of a BOZ literal on the RHS. */
10179 if (rhs
->is_boz
&& lhs
->ts
.type
!= BT_INTEGER
)
10182 if (warn_surprising
)
10183 gfc_warning (OPT_Wsurprising
,
10184 "BOZ literal at %L is bitwise transferred "
10185 "non-integer symbol %qs", &code
->loc
,
10186 lhs
->symtree
->n
.sym
->name
);
10188 if (!gfc_convert_boz (rhs
, &lhs
->ts
))
10190 if ((rc
= gfc_range_check (rhs
)) != ARITH_OK
)
10192 if (rc
== ARITH_UNDERFLOW
)
10193 gfc_error ("Arithmetic underflow of bit-wise transferred BOZ at %L"
10194 ". This check can be disabled with the option "
10195 "%<-fno-range-check%>", &rhs
->where
);
10196 else if (rc
== ARITH_OVERFLOW
)
10197 gfc_error ("Arithmetic overflow of bit-wise transferred BOZ at %L"
10198 ". This check can be disabled with the option "
10199 "%<-fno-range-check%>", &rhs
->where
);
10200 else if (rc
== ARITH_NAN
)
10201 gfc_error ("Arithmetic NaN of bit-wise transferred BOZ at %L"
10202 ". This check can be disabled with the option "
10203 "%<-fno-range-check%>", &rhs
->where
);
10208 if (lhs
->ts
.type
== BT_CHARACTER
10209 && warn_character_truncation
)
10211 if (lhs
->ts
.u
.cl
!= NULL
10212 && lhs
->ts
.u
.cl
->length
!= NULL
10213 && lhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10214 llen
= mpz_get_si (lhs
->ts
.u
.cl
->length
->value
.integer
);
10216 if (rhs
->expr_type
== EXPR_CONSTANT
)
10217 rlen
= rhs
->value
.character
.length
;
10219 else if (rhs
->ts
.u
.cl
!= NULL
10220 && rhs
->ts
.u
.cl
->length
!= NULL
10221 && rhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10222 rlen
= mpz_get_si (rhs
->ts
.u
.cl
->length
->value
.integer
);
10224 if (rlen
&& llen
&& rlen
> llen
)
10225 gfc_warning_now (OPT_Wcharacter_truncation
,
10226 "CHARACTER expression will be truncated "
10227 "in assignment (%d/%d) at %L",
10228 llen
, rlen
, &code
->loc
);
10231 /* Ensure that a vector index expression for the lvalue is evaluated
10232 to a temporary if the lvalue symbol is referenced in it. */
10235 for (ref
= lhs
->ref
; ref
; ref
= ref
->next
)
10236 if (ref
->type
== REF_ARRAY
)
10238 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
10239 if (ref
->u
.ar
.dimen_type
[n
] == DIMEN_VECTOR
10240 && gfc_find_sym_in_expr (lhs
->symtree
->n
.sym
,
10241 ref
->u
.ar
.start
[n
]))
10243 = gfc_get_parentheses (ref
->u
.ar
.start
[n
]);
10247 if (gfc_pure (NULL
))
10249 if (lhs
->ts
.type
== BT_DERIVED
10250 && lhs
->expr_type
== EXPR_VARIABLE
10251 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10252 && rhs
->expr_type
== EXPR_VARIABLE
10253 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10254 || gfc_is_coindexed (rhs
)))
10256 /* F2008, C1283. */
10257 if (gfc_is_coindexed (rhs
))
10258 gfc_error ("Coindexed expression at %L is assigned to "
10259 "a derived type variable with a POINTER "
10260 "component in a PURE procedure",
10263 gfc_error ("The impure variable at %L is assigned to "
10264 "a derived type variable with a POINTER "
10265 "component in a PURE procedure (12.6)",
10270 /* Fortran 2008, C1283. */
10271 if (gfc_is_coindexed (lhs
))
10273 gfc_error ("Assignment to coindexed variable at %L in a PURE "
10274 "procedure", &rhs
->where
);
10279 if (gfc_implicit_pure (NULL
))
10281 if (lhs
->expr_type
== EXPR_VARIABLE
10282 && lhs
->symtree
->n
.sym
!= gfc_current_ns
->proc_name
10283 && lhs
->symtree
->n
.sym
->ns
!= gfc_current_ns
)
10284 gfc_unset_implicit_pure (NULL
);
10286 if (lhs
->ts
.type
== BT_DERIVED
10287 && lhs
->expr_type
== EXPR_VARIABLE
10288 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10289 && rhs
->expr_type
== EXPR_VARIABLE
10290 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10291 || gfc_is_coindexed (rhs
)))
10292 gfc_unset_implicit_pure (NULL
);
10294 /* Fortran 2008, C1283. */
10295 if (gfc_is_coindexed (lhs
))
10296 gfc_unset_implicit_pure (NULL
);
10299 /* F2008, 7.2.1.2. */
10300 attr
= gfc_expr_attr (lhs
);
10301 if (lhs
->ts
.type
== BT_CLASS
&& attr
.allocatable
)
10303 if (attr
.codimension
)
10305 gfc_error ("Assignment to polymorphic coarray at %L is not "
10306 "permitted", &lhs
->where
);
10309 if (!gfc_notify_std (GFC_STD_F2008
, "Assignment to an allocatable "
10310 "polymorphic variable at %L", &lhs
->where
))
10312 if (!flag_realloc_lhs
)
10314 gfc_error ("Assignment to an allocatable polymorphic variable at %L "
10315 "requires %<-frealloc-lhs%>", &lhs
->where
);
10319 else if (lhs
->ts
.type
== BT_CLASS
)
10321 gfc_error ("Nonallocatable variable must not be polymorphic in intrinsic "
10322 "assignment at %L - check that there is a matching specific "
10323 "subroutine for '=' operator", &lhs
->where
);
10327 bool lhs_coindexed
= gfc_is_coindexed (lhs
);
10329 /* F2008, Section 7.2.1.2. */
10330 if (lhs_coindexed
&& gfc_has_ultimate_allocatable (lhs
))
10332 gfc_error ("Coindexed variable must not have an allocatable ultimate "
10333 "component in assignment at %L", &lhs
->where
);
10337 /* Assign the 'data' of a class object to a derived type. */
10338 if (lhs
->ts
.type
== BT_DERIVED
10339 && rhs
->ts
.type
== BT_CLASS
10340 && rhs
->expr_type
!= EXPR_ARRAY
)
10341 gfc_add_data_component (rhs
);
10343 bool caf_convert_to_send
= flag_coarray
== GFC_FCOARRAY_LIB
10345 || (code
->expr2
->expr_type
== EXPR_FUNCTION
10346 && code
->expr2
->value
.function
.isym
10347 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
10348 && (code
->expr1
->rank
== 0 || code
->expr2
->rank
!= 0)
10349 && !gfc_expr_attr (rhs
).allocatable
10350 && !gfc_has_vector_subscript (rhs
)));
10352 gfc_check_assign (lhs
, rhs
, 1, !caf_convert_to_send
);
10354 /* Insert a GFC_ISYM_CAF_SEND intrinsic, when the LHS is a coindexed variable.
10355 Additionally, insert this code when the RHS is a CAF as we then use the
10356 GFC_ISYM_CAF_SEND intrinsic just to avoid a temporary; but do not do so if
10357 the LHS is (re)allocatable or has a vector subscript. If the LHS is a
10358 noncoindexed array and the RHS is a coindexed scalar, use the normal code
10360 if (caf_convert_to_send
)
10362 if (code
->expr2
->expr_type
== EXPR_FUNCTION
10363 && code
->expr2
->value
.function
.isym
10364 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
10365 remove_caf_get_intrinsic (code
->expr2
);
10366 code
->op
= EXEC_CALL
;
10367 gfc_get_sym_tree (GFC_PREFIX ("caf_send"), ns
, &code
->symtree
, true);
10368 code
->resolved_sym
= code
->symtree
->n
.sym
;
10369 code
->resolved_sym
->attr
.flavor
= FL_PROCEDURE
;
10370 code
->resolved_sym
->attr
.intrinsic
= 1;
10371 code
->resolved_sym
->attr
.subroutine
= 1;
10372 code
->resolved_isym
= gfc_intrinsic_subroutine_by_id (GFC_ISYM_CAF_SEND
);
10373 gfc_commit_symbol (code
->resolved_sym
);
10374 code
->ext
.actual
= gfc_get_actual_arglist ();
10375 code
->ext
.actual
->expr
= lhs
;
10376 code
->ext
.actual
->next
= gfc_get_actual_arglist ();
10377 code
->ext
.actual
->next
->expr
= rhs
;
10378 code
->expr1
= NULL
;
10379 code
->expr2
= NULL
;
10386 /* Add a component reference onto an expression. */
10389 add_comp_ref (gfc_expr
*e
, gfc_component
*c
)
10394 ref
= &((*ref
)->next
);
10395 *ref
= gfc_get_ref ();
10396 (*ref
)->type
= REF_COMPONENT
;
10397 (*ref
)->u
.c
.sym
= e
->ts
.u
.derived
;
10398 (*ref
)->u
.c
.component
= c
;
10401 /* Add a full array ref, as necessary. */
10404 gfc_add_full_array_ref (e
, c
->as
);
10405 e
->rank
= c
->as
->rank
;
10410 /* Build an assignment. Keep the argument 'op' for future use, so that
10411 pointer assignments can be made. */
10414 build_assignment (gfc_exec_op op
, gfc_expr
*expr1
, gfc_expr
*expr2
,
10415 gfc_component
*comp1
, gfc_component
*comp2
, locus loc
)
10417 gfc_code
*this_code
;
10419 this_code
= gfc_get_code (op
);
10420 this_code
->next
= NULL
;
10421 this_code
->expr1
= gfc_copy_expr (expr1
);
10422 this_code
->expr2
= gfc_copy_expr (expr2
);
10423 this_code
->loc
= loc
;
10424 if (comp1
&& comp2
)
10426 add_comp_ref (this_code
->expr1
, comp1
);
10427 add_comp_ref (this_code
->expr2
, comp2
);
10434 /* Makes a temporary variable expression based on the characteristics of
10435 a given variable expression. */
10438 get_temp_from_expr (gfc_expr
*e
, gfc_namespace
*ns
)
10440 static int serial
= 0;
10441 char name
[GFC_MAX_SYMBOL_LEN
];
10443 gfc_array_spec
*as
;
10444 gfc_array_ref
*aref
;
10447 sprintf (name
, GFC_PREFIX("DA%d"), serial
++);
10448 gfc_get_sym_tree (name
, ns
, &tmp
, false);
10449 gfc_add_type (tmp
->n
.sym
, &e
->ts
, NULL
);
10455 /* Obtain the arrayspec for the temporary. */
10456 if (e
->rank
&& e
->expr_type
!= EXPR_ARRAY
10457 && e
->expr_type
!= EXPR_FUNCTION
10458 && e
->expr_type
!= EXPR_OP
)
10460 aref
= gfc_find_array_ref (e
);
10461 if (e
->expr_type
== EXPR_VARIABLE
10462 && e
->symtree
->n
.sym
->as
== aref
->as
)
10466 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
10467 if (ref
->type
== REF_COMPONENT
10468 && ref
->u
.c
.component
->as
== aref
->as
)
10476 /* Add the attributes and the arrayspec to the temporary. */
10477 tmp
->n
.sym
->attr
= gfc_expr_attr (e
);
10478 tmp
->n
.sym
->attr
.function
= 0;
10479 tmp
->n
.sym
->attr
.result
= 0;
10480 tmp
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
10484 tmp
->n
.sym
->as
= gfc_copy_array_spec (as
);
10487 if (as
->type
== AS_DEFERRED
)
10488 tmp
->n
.sym
->attr
.allocatable
= 1;
10490 else if (e
->rank
&& (e
->expr_type
== EXPR_ARRAY
10491 || e
->expr_type
== EXPR_FUNCTION
10492 || e
->expr_type
== EXPR_OP
))
10494 tmp
->n
.sym
->as
= gfc_get_array_spec ();
10495 tmp
->n
.sym
->as
->type
= AS_DEFERRED
;
10496 tmp
->n
.sym
->as
->rank
= e
->rank
;
10497 tmp
->n
.sym
->attr
.allocatable
= 1;
10498 tmp
->n
.sym
->attr
.dimension
= 1;
10501 tmp
->n
.sym
->attr
.dimension
= 0;
10503 gfc_set_sym_referenced (tmp
->n
.sym
);
10504 gfc_commit_symbol (tmp
->n
.sym
);
10505 e
= gfc_lval_expr_from_sym (tmp
->n
.sym
);
10507 /* Should the lhs be a section, use its array ref for the
10508 temporary expression. */
10509 if (aref
&& aref
->type
!= AR_FULL
)
10511 gfc_free_ref_list (e
->ref
);
10512 e
->ref
= gfc_copy_ref (ref
);
10518 /* Add one line of code to the code chain, making sure that 'head' and
10519 'tail' are appropriately updated. */
10522 add_code_to_chain (gfc_code
**this_code
, gfc_code
**head
, gfc_code
**tail
)
10524 gcc_assert (this_code
);
10526 *head
= *tail
= *this_code
;
10528 *tail
= gfc_append_code (*tail
, *this_code
);
10533 /* Counts the potential number of part array references that would
10534 result from resolution of typebound defined assignments. */
10537 nonscalar_typebound_assign (gfc_symbol
*derived
, int depth
)
10540 int c_depth
= 0, t_depth
;
10542 for (c
= derived
->components
; c
; c
= c
->next
)
10544 if ((!gfc_bt_struct (c
->ts
.type
)
10546 || c
->attr
.allocatable
10547 || c
->attr
.proc_pointer_comp
10548 || c
->attr
.class_pointer
10549 || c
->attr
.proc_pointer
)
10550 && !c
->attr
.defined_assign_comp
)
10553 if (c
->as
&& c_depth
== 0)
10556 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
10557 t_depth
= nonscalar_typebound_assign (c
->ts
.u
.derived
,
10562 c_depth
= t_depth
> c_depth
? t_depth
: c_depth
;
10564 return depth
+ c_depth
;
10568 /* Implement 7.2.1.3 of the F08 standard:
10569 "An intrinsic assignment where the variable is of derived type is
10570 performed as if each component of the variable were assigned from the
10571 corresponding component of expr using pointer assignment (7.2.2) for
10572 each pointer component, defined assignment for each nonpointer
10573 nonallocatable component of a type that has a type-bound defined
10574 assignment consistent with the component, intrinsic assignment for
10575 each other nonpointer nonallocatable component, ..."
10577 The pointer assignments are taken care of by the intrinsic
10578 assignment of the structure itself. This function recursively adds
10579 defined assignments where required. The recursion is accomplished
10580 by calling gfc_resolve_code.
10582 When the lhs in a defined assignment has intent INOUT, we need a
10583 temporary for the lhs. In pseudo-code:
10585 ! Only call function lhs once.
10586 if (lhs is not a constant or an variable)
10589 ! Do the intrinsic assignment
10591 ! Now do the defined assignments
10592 do over components with typebound defined assignment [%cmp]
10593 #if one component's assignment procedure is INOUT
10595 #if expr2 non-variable
10601 t1%cmp {defined=} expr2%cmp
10607 expr1%cmp {defined=} expr2%cmp
10611 /* The temporary assignments have to be put on top of the additional
10612 code to avoid the result being changed by the intrinsic assignment.
10614 static int component_assignment_level
= 0;
10615 static gfc_code
*tmp_head
= NULL
, *tmp_tail
= NULL
;
10618 generate_component_assignments (gfc_code
**code
, gfc_namespace
*ns
)
10620 gfc_component
*comp1
, *comp2
;
10621 gfc_code
*this_code
= NULL
, *head
= NULL
, *tail
= NULL
;
10623 int error_count
, depth
;
10625 gfc_get_errors (NULL
, &error_count
);
10627 /* Filter out continuing processing after an error. */
10629 || (*code
)->expr1
->ts
.type
!= BT_DERIVED
10630 || (*code
)->expr2
->ts
.type
!= BT_DERIVED
)
10633 /* TODO: Handle more than one part array reference in assignments. */
10634 depth
= nonscalar_typebound_assign ((*code
)->expr1
->ts
.u
.derived
,
10635 (*code
)->expr1
->rank
? 1 : 0);
10638 gfc_warning (0, "TODO: type-bound defined assignment(s) at %L not "
10639 "done because multiple part array references would "
10640 "occur in intermediate expressions.", &(*code
)->loc
);
10644 component_assignment_level
++;
10646 /* Create a temporary so that functions get called only once. */
10647 if ((*code
)->expr2
->expr_type
!= EXPR_VARIABLE
10648 && (*code
)->expr2
->expr_type
!= EXPR_CONSTANT
)
10650 gfc_expr
*tmp_expr
;
10652 /* Assign the rhs to the temporary. */
10653 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
10654 this_code
= build_assignment (EXEC_ASSIGN
,
10655 tmp_expr
, (*code
)->expr2
,
10656 NULL
, NULL
, (*code
)->loc
);
10657 /* Add the code and substitute the rhs expression. */
10658 add_code_to_chain (&this_code
, &tmp_head
, &tmp_tail
);
10659 gfc_free_expr ((*code
)->expr2
);
10660 (*code
)->expr2
= tmp_expr
;
10663 /* Do the intrinsic assignment. This is not needed if the lhs is one
10664 of the temporaries generated here, since the intrinsic assignment
10665 to the final result already does this. */
10666 if ((*code
)->expr1
->symtree
->n
.sym
->name
[2] != '@')
10668 this_code
= build_assignment (EXEC_ASSIGN
,
10669 (*code
)->expr1
, (*code
)->expr2
,
10670 NULL
, NULL
, (*code
)->loc
);
10671 add_code_to_chain (&this_code
, &head
, &tail
);
10674 comp1
= (*code
)->expr1
->ts
.u
.derived
->components
;
10675 comp2
= (*code
)->expr2
->ts
.u
.derived
->components
;
10678 for (; comp1
; comp1
= comp1
->next
, comp2
= comp2
->next
)
10680 bool inout
= false;
10682 /* The intrinsic assignment does the right thing for pointers
10683 of all kinds and allocatable components. */
10684 if (!gfc_bt_struct (comp1
->ts
.type
)
10685 || comp1
->attr
.pointer
10686 || comp1
->attr
.allocatable
10687 || comp1
->attr
.proc_pointer_comp
10688 || comp1
->attr
.class_pointer
10689 || comp1
->attr
.proc_pointer
)
10692 /* Make an assigment for this component. */
10693 this_code
= build_assignment (EXEC_ASSIGN
,
10694 (*code
)->expr1
, (*code
)->expr2
,
10695 comp1
, comp2
, (*code
)->loc
);
10697 /* Convert the assignment if there is a defined assignment for
10698 this type. Otherwise, using the call from gfc_resolve_code,
10699 recurse into its components. */
10700 gfc_resolve_code (this_code
, ns
);
10702 if (this_code
->op
== EXEC_ASSIGN_CALL
)
10704 gfc_formal_arglist
*dummy_args
;
10706 /* Check that there is a typebound defined assignment. If not,
10707 then this must be a module defined assignment. We cannot
10708 use the defined_assign_comp attribute here because it must
10709 be this derived type that has the defined assignment and not
10711 if (!(comp1
->ts
.u
.derived
->f2k_derived
10712 && comp1
->ts
.u
.derived
->f2k_derived
10713 ->tb_op
[INTRINSIC_ASSIGN
]))
10715 gfc_free_statements (this_code
);
10720 /* If the first argument of the subroutine has intent INOUT
10721 a temporary must be generated and used instead. */
10722 rsym
= this_code
->resolved_sym
;
10723 dummy_args
= gfc_sym_get_dummy_args (rsym
);
10725 && dummy_args
->sym
->attr
.intent
== INTENT_INOUT
)
10727 gfc_code
*temp_code
;
10730 /* Build the temporary required for the assignment and put
10731 it at the head of the generated code. */
10734 t1
= get_temp_from_expr ((*code
)->expr1
, ns
);
10735 temp_code
= build_assignment (EXEC_ASSIGN
,
10736 t1
, (*code
)->expr1
,
10737 NULL
, NULL
, (*code
)->loc
);
10739 /* For allocatable LHS, check whether it is allocated. Note
10740 that allocatable components with defined assignment are
10741 not yet support. See PR 57696. */
10742 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
)
10746 gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
10747 block
= gfc_get_code (EXEC_IF
);
10748 block
->block
= gfc_get_code (EXEC_IF
);
10749 block
->block
->expr1
10750 = gfc_build_intrinsic_call (ns
,
10751 GFC_ISYM_ALLOCATED
, "allocated",
10752 (*code
)->loc
, 1, e
);
10753 block
->block
->next
= temp_code
;
10756 add_code_to_chain (&temp_code
, &tmp_head
, &tmp_tail
);
10759 /* Replace the first actual arg with the component of the
10761 gfc_free_expr (this_code
->ext
.actual
->expr
);
10762 this_code
->ext
.actual
->expr
= gfc_copy_expr (t1
);
10763 add_comp_ref (this_code
->ext
.actual
->expr
, comp1
);
10765 /* If the LHS variable is allocatable and wasn't allocated and
10766 the temporary is allocatable, pointer assign the address of
10767 the freshly allocated LHS to the temporary. */
10768 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
10769 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
10774 cond
= gfc_get_expr ();
10775 cond
->ts
.type
= BT_LOGICAL
;
10776 cond
->ts
.kind
= gfc_default_logical_kind
;
10777 cond
->expr_type
= EXPR_OP
;
10778 cond
->where
= (*code
)->loc
;
10779 cond
->value
.op
.op
= INTRINSIC_NOT
;
10780 cond
->value
.op
.op1
= gfc_build_intrinsic_call (ns
,
10781 GFC_ISYM_ALLOCATED
, "allocated",
10782 (*code
)->loc
, 1, gfc_copy_expr (t1
));
10783 block
= gfc_get_code (EXEC_IF
);
10784 block
->block
= gfc_get_code (EXEC_IF
);
10785 block
->block
->expr1
= cond
;
10786 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
10787 t1
, (*code
)->expr1
,
10788 NULL
, NULL
, (*code
)->loc
);
10789 add_code_to_chain (&block
, &head
, &tail
);
10793 else if (this_code
->op
== EXEC_ASSIGN
&& !this_code
->next
)
10795 /* Don't add intrinsic assignments since they are already
10796 effected by the intrinsic assignment of the structure. */
10797 gfc_free_statements (this_code
);
10802 add_code_to_chain (&this_code
, &head
, &tail
);
10806 /* Transfer the value to the final result. */
10807 this_code
= build_assignment (EXEC_ASSIGN
,
10808 (*code
)->expr1
, t1
,
10809 comp1
, comp2
, (*code
)->loc
);
10810 add_code_to_chain (&this_code
, &head
, &tail
);
10814 /* Put the temporary assignments at the top of the generated code. */
10815 if (tmp_head
&& component_assignment_level
== 1)
10817 gfc_append_code (tmp_head
, head
);
10819 tmp_head
= tmp_tail
= NULL
;
10822 // If we did a pointer assignment - thus, we need to ensure that the LHS is
10823 // not accidentally deallocated. Hence, nullify t1.
10824 if (t1
&& (*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
10825 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
10831 e
= gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
10832 cond
= gfc_build_intrinsic_call (ns
, GFC_ISYM_ASSOCIATED
, "associated",
10833 (*code
)->loc
, 2, gfc_copy_expr (t1
), e
);
10834 block
= gfc_get_code (EXEC_IF
);
10835 block
->block
= gfc_get_code (EXEC_IF
);
10836 block
->block
->expr1
= cond
;
10837 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
10838 t1
, gfc_get_null_expr (&(*code
)->loc
),
10839 NULL
, NULL
, (*code
)->loc
);
10840 gfc_append_code (tail
, block
);
10844 /* Now attach the remaining code chain to the input code. Step on
10845 to the end of the new code since resolution is complete. */
10846 gcc_assert ((*code
)->op
== EXEC_ASSIGN
);
10847 tail
->next
= (*code
)->next
;
10848 /* Overwrite 'code' because this would place the intrinsic assignment
10849 before the temporary for the lhs is created. */
10850 gfc_free_expr ((*code
)->expr1
);
10851 gfc_free_expr ((*code
)->expr2
);
10857 component_assignment_level
--;
10861 /* F2008: Pointer function assignments are of the form:
10862 ptr_fcn (args) = expr
10863 This function breaks these assignments into two statements:
10864 temporary_pointer => ptr_fcn(args)
10865 temporary_pointer = expr */
10868 resolve_ptr_fcn_assign (gfc_code
**code
, gfc_namespace
*ns
)
10870 gfc_expr
*tmp_ptr_expr
;
10871 gfc_code
*this_code
;
10872 gfc_component
*comp
;
10875 if ((*code
)->expr1
->expr_type
!= EXPR_FUNCTION
)
10878 /* Even if standard does not support this feature, continue to build
10879 the two statements to avoid upsetting frontend_passes.c. */
10880 gfc_notify_std (GFC_STD_F2008
, "Pointer procedure assignment at "
10881 "%L", &(*code
)->loc
);
10883 comp
= gfc_get_proc_ptr_comp ((*code
)->expr1
);
10886 s
= comp
->ts
.interface
;
10888 s
= (*code
)->expr1
->symtree
->n
.sym
;
10890 if (s
== NULL
|| !s
->result
->attr
.pointer
)
10892 gfc_error ("The function result on the lhs of the assignment at "
10893 "%L must have the pointer attribute.",
10894 &(*code
)->expr1
->where
);
10895 (*code
)->op
= EXEC_NOP
;
10899 tmp_ptr_expr
= get_temp_from_expr ((*code
)->expr2
, ns
);
10901 /* get_temp_from_expression is set up for ordinary assignments. To that
10902 end, where array bounds are not known, arrays are made allocatable.
10903 Change the temporary to a pointer here. */
10904 tmp_ptr_expr
->symtree
->n
.sym
->attr
.pointer
= 1;
10905 tmp_ptr_expr
->symtree
->n
.sym
->attr
.allocatable
= 0;
10906 tmp_ptr_expr
->where
= (*code
)->loc
;
10908 this_code
= build_assignment (EXEC_ASSIGN
,
10909 tmp_ptr_expr
, (*code
)->expr2
,
10910 NULL
, NULL
, (*code
)->loc
);
10911 this_code
->next
= (*code
)->next
;
10912 (*code
)->next
= this_code
;
10913 (*code
)->op
= EXEC_POINTER_ASSIGN
;
10914 (*code
)->expr2
= (*code
)->expr1
;
10915 (*code
)->expr1
= tmp_ptr_expr
;
10921 /* Deferred character length assignments from an operator expression
10922 require a temporary because the character length of the lhs can
10923 change in the course of the assignment. */
10926 deferred_op_assign (gfc_code
**code
, gfc_namespace
*ns
)
10928 gfc_expr
*tmp_expr
;
10929 gfc_code
*this_code
;
10931 if (!((*code
)->expr1
->ts
.type
== BT_CHARACTER
10932 && (*code
)->expr1
->ts
.deferred
&& (*code
)->expr1
->rank
10933 && (*code
)->expr2
->expr_type
== EXPR_OP
))
10936 if (!gfc_check_dependency ((*code
)->expr1
, (*code
)->expr2
, 1))
10939 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
10940 tmp_expr
->where
= (*code
)->loc
;
10942 /* A new charlen is required to ensure that the variable string
10943 length is different to that of the original lhs. */
10944 tmp_expr
->ts
.u
.cl
= gfc_get_charlen();
10945 tmp_expr
->symtree
->n
.sym
->ts
.u
.cl
= tmp_expr
->ts
.u
.cl
;
10946 tmp_expr
->ts
.u
.cl
->next
= (*code
)->expr2
->ts
.u
.cl
->next
;
10947 (*code
)->expr2
->ts
.u
.cl
->next
= tmp_expr
->ts
.u
.cl
;
10949 tmp_expr
->symtree
->n
.sym
->ts
.deferred
= 1;
10951 this_code
= build_assignment (EXEC_ASSIGN
,
10953 gfc_copy_expr (tmp_expr
),
10954 NULL
, NULL
, (*code
)->loc
);
10956 (*code
)->expr1
= tmp_expr
;
10958 this_code
->next
= (*code
)->next
;
10959 (*code
)->next
= this_code
;
10965 /* Given a block of code, recursively resolve everything pointed to by this
10969 gfc_resolve_code (gfc_code
*code
, gfc_namespace
*ns
)
10971 int omp_workshare_save
;
10972 int forall_save
, do_concurrent_save
;
10976 frame
.prev
= cs_base
;
10980 find_reachable_labels (code
);
10982 for (; code
; code
= code
->next
)
10984 frame
.current
= code
;
10985 forall_save
= forall_flag
;
10986 do_concurrent_save
= gfc_do_concurrent_flag
;
10988 if (code
->op
== EXEC_FORALL
)
10991 gfc_resolve_forall (code
, ns
, forall_save
);
10994 else if (code
->block
)
10996 omp_workshare_save
= -1;
10999 case EXEC_OACC_PARALLEL_LOOP
:
11000 case EXEC_OACC_PARALLEL
:
11001 case EXEC_OACC_KERNELS_LOOP
:
11002 case EXEC_OACC_KERNELS
:
11003 case EXEC_OACC_DATA
:
11004 case EXEC_OACC_HOST_DATA
:
11005 case EXEC_OACC_LOOP
:
11006 gfc_resolve_oacc_blocks (code
, ns
);
11008 case EXEC_OMP_PARALLEL_WORKSHARE
:
11009 omp_workshare_save
= omp_workshare_flag
;
11010 omp_workshare_flag
= 1;
11011 gfc_resolve_omp_parallel_blocks (code
, ns
);
11013 case EXEC_OMP_PARALLEL
:
11014 case EXEC_OMP_PARALLEL_DO
:
11015 case EXEC_OMP_PARALLEL_DO_SIMD
:
11016 case EXEC_OMP_PARALLEL_SECTIONS
:
11017 case EXEC_OMP_TARGET_PARALLEL
:
11018 case EXEC_OMP_TARGET_PARALLEL_DO
:
11019 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11020 case EXEC_OMP_TARGET_TEAMS
:
11021 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11022 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11023 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11024 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11025 case EXEC_OMP_TASK
:
11026 case EXEC_OMP_TASKLOOP
:
11027 case EXEC_OMP_TASKLOOP_SIMD
:
11028 case EXEC_OMP_TEAMS
:
11029 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11030 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11031 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11032 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11033 omp_workshare_save
= omp_workshare_flag
;
11034 omp_workshare_flag
= 0;
11035 gfc_resolve_omp_parallel_blocks (code
, ns
);
11037 case EXEC_OMP_DISTRIBUTE
:
11038 case EXEC_OMP_DISTRIBUTE_SIMD
:
11040 case EXEC_OMP_DO_SIMD
:
11041 case EXEC_OMP_SIMD
:
11042 case EXEC_OMP_TARGET_SIMD
:
11043 gfc_resolve_omp_do_blocks (code
, ns
);
11045 case EXEC_SELECT_TYPE
:
11046 /* Blocks are handled in resolve_select_type because we have
11047 to transform the SELECT TYPE into ASSOCIATE first. */
11049 case EXEC_DO_CONCURRENT
:
11050 gfc_do_concurrent_flag
= 1;
11051 gfc_resolve_blocks (code
->block
, ns
);
11052 gfc_do_concurrent_flag
= 2;
11054 case EXEC_OMP_WORKSHARE
:
11055 omp_workshare_save
= omp_workshare_flag
;
11056 omp_workshare_flag
= 1;
11059 gfc_resolve_blocks (code
->block
, ns
);
11063 if (omp_workshare_save
!= -1)
11064 omp_workshare_flag
= omp_workshare_save
;
11068 if (code
->op
!= EXEC_COMPCALL
&& code
->op
!= EXEC_CALL_PPC
)
11069 t
= gfc_resolve_expr (code
->expr1
);
11070 forall_flag
= forall_save
;
11071 gfc_do_concurrent_flag
= do_concurrent_save
;
11073 if (!gfc_resolve_expr (code
->expr2
))
11076 if (code
->op
== EXEC_ALLOCATE
11077 && !gfc_resolve_expr (code
->expr3
))
11083 case EXEC_END_BLOCK
:
11084 case EXEC_END_NESTED_BLOCK
:
11088 case EXEC_ERROR_STOP
:
11090 case EXEC_CONTINUE
:
11092 case EXEC_ASSIGN_CALL
:
11095 case EXEC_CRITICAL
:
11096 resolve_critical (code
);
11099 case EXEC_SYNC_ALL
:
11100 case EXEC_SYNC_IMAGES
:
11101 case EXEC_SYNC_MEMORY
:
11102 resolve_sync (code
);
11107 case EXEC_EVENT_POST
:
11108 case EXEC_EVENT_WAIT
:
11109 resolve_lock_unlock_event (code
);
11112 case EXEC_FAIL_IMAGE
:
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 if (c
->attr
.proc_pointer
&& c
->ts
.interface
)
13567 gfc_symbol
*ifc
= c
->ts
.interface
;
13569 if (!sym
->attr
.vtype
&& !check_proc_interface (ifc
, &c
->loc
))
13575 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
13577 /* Resolve interface and copy attributes. */
13578 if (ifc
->formal
&& !ifc
->formal_ns
)
13579 resolve_symbol (ifc
);
13580 if (ifc
->attr
.intrinsic
)
13581 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
13585 c
->ts
= ifc
->result
->ts
;
13586 c
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
13587 c
->attr
.pointer
= ifc
->result
->attr
.pointer
;
13588 c
->attr
.dimension
= ifc
->result
->attr
.dimension
;
13589 c
->as
= gfc_copy_array_spec (ifc
->result
->as
);
13590 c
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
13595 c
->attr
.allocatable
= ifc
->attr
.allocatable
;
13596 c
->attr
.pointer
= ifc
->attr
.pointer
;
13597 c
->attr
.dimension
= ifc
->attr
.dimension
;
13598 c
->as
= gfc_copy_array_spec (ifc
->as
);
13599 c
->attr
.class_ok
= ifc
->attr
.class_ok
;
13601 c
->ts
.interface
= ifc
;
13602 c
->attr
.function
= ifc
->attr
.function
;
13603 c
->attr
.subroutine
= ifc
->attr
.subroutine
;
13605 c
->attr
.pure
= ifc
->attr
.pure
;
13606 c
->attr
.elemental
= ifc
->attr
.elemental
;
13607 c
->attr
.recursive
= ifc
->attr
.recursive
;
13608 c
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
13609 c
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
13610 /* Copy char length. */
13611 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
13613 gfc_charlen
*cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
13614 if (cl
->length
&& !cl
->resolved
13615 && !gfc_resolve_expr (cl
->length
))
13624 else if (c
->attr
.proc_pointer
&& c
->ts
.type
== BT_UNKNOWN
)
13626 /* Since PPCs are not implicitly typed, a PPC without an explicit
13627 interface must be a subroutine. */
13628 gfc_add_subroutine (&c
->attr
, c
->name
, &c
->loc
);
13631 /* Procedure pointer components: Check PASS arg. */
13632 if (c
->attr
.proc_pointer
&& !c
->tb
->nopass
&& c
->tb
->pass_arg_num
== 0
13633 && !sym
->attr
.vtype
)
13635 gfc_symbol
* me_arg
;
13637 if (c
->tb
->pass_arg
)
13639 gfc_formal_arglist
* i
;
13641 /* If an explicit passing argument name is given, walk the arg-list
13642 and look for it. */
13645 c
->tb
->pass_arg_num
= 1;
13646 for (i
= c
->ts
.interface
->formal
; i
; i
= i
->next
)
13648 if (!strcmp (i
->sym
->name
, c
->tb
->pass_arg
))
13653 c
->tb
->pass_arg_num
++;
13658 gfc_error ("Procedure pointer component %qs with PASS(%s) "
13659 "at %L has no argument %qs", c
->name
,
13660 c
->tb
->pass_arg
, &c
->loc
, c
->tb
->pass_arg
);
13667 /* Otherwise, take the first one; there should in fact be at least
13669 c
->tb
->pass_arg_num
= 1;
13670 if (!c
->ts
.interface
->formal
)
13672 gfc_error ("Procedure pointer component %qs with PASS at %L "
13673 "must have at least one argument",
13678 me_arg
= c
->ts
.interface
->formal
->sym
;
13681 /* Now check that the argument-type matches. */
13682 gcc_assert (me_arg
);
13683 if ((me_arg
->ts
.type
!= BT_DERIVED
&& me_arg
->ts
.type
!= BT_CLASS
)
13684 || (me_arg
->ts
.type
== BT_DERIVED
&& me_arg
->ts
.u
.derived
!= sym
)
13685 || (me_arg
->ts
.type
== BT_CLASS
13686 && CLASS_DATA (me_arg
)->ts
.u
.derived
!= sym
))
13688 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13689 " the derived type %qs", me_arg
->name
, c
->name
,
13690 me_arg
->name
, &c
->loc
, sym
->name
);
13695 /* Check for C453. */
13696 if (me_arg
->attr
.dimension
)
13698 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13699 "must be scalar", me_arg
->name
, c
->name
, me_arg
->name
,
13705 if (me_arg
->attr
.pointer
)
13707 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13708 "may not have the POINTER attribute", me_arg
->name
,
13709 c
->name
, me_arg
->name
, &c
->loc
);
13714 if (me_arg
->attr
.allocatable
)
13716 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13717 "may not be ALLOCATABLE", me_arg
->name
, c
->name
,
13718 me_arg
->name
, &c
->loc
);
13723 if (gfc_type_is_extensible (sym
) && me_arg
->ts
.type
!= BT_CLASS
)
13725 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13726 " at %L", c
->name
, &c
->loc
);
13732 /* Check type-spec if this is not the parent-type component. */
13733 if (((sym
->attr
.is_class
13734 && (!sym
->components
->ts
.u
.derived
->attr
.extension
13735 || c
!= sym
->components
->ts
.u
.derived
->components
))
13736 || (!sym
->attr
.is_class
13737 && (!sym
->attr
.extension
|| c
!= sym
->components
)))
13738 && !sym
->attr
.vtype
13739 && !resolve_typespec_used (&c
->ts
, &c
->loc
, c
->name
))
13742 super_type
= gfc_get_derived_super_type (sym
);
13744 /* If this type is an extension, set the accessibility of the parent
13747 && ((sym
->attr
.is_class
13748 && c
== sym
->components
->ts
.u
.derived
->components
)
13749 || (!sym
->attr
.is_class
&& c
== sym
->components
))
13750 && strcmp (super_type
->name
, c
->name
) == 0)
13751 c
->attr
.access
= super_type
->attr
.access
;
13753 /* If this type is an extension, see if this component has the same name
13754 as an inherited type-bound procedure. */
13755 if (super_type
&& !sym
->attr
.is_class
13756 && gfc_find_typebound_proc (super_type
, NULL
, c
->name
, true, NULL
))
13758 gfc_error ("Component %qs of %qs at %L has the same name as an"
13759 " inherited type-bound procedure",
13760 c
->name
, sym
->name
, &c
->loc
);
13764 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.proc_pointer
13765 && !c
->ts
.deferred
)
13767 if (c
->ts
.u
.cl
->length
== NULL
13768 || (!resolve_charlen(c
->ts
.u
.cl
))
13769 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
))
13771 gfc_error ("Character length of component %qs needs to "
13772 "be a constant specification expression at %L",
13774 c
->ts
.u
.cl
->length
? &c
->ts
.u
.cl
->length
->where
: &c
->loc
);
13779 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.deferred
13780 && !c
->attr
.pointer
&& !c
->attr
.allocatable
)
13782 gfc_error ("Character component %qs of %qs at %L with deferred "
13783 "length must be a POINTER or ALLOCATABLE",
13784 c
->name
, sym
->name
, &c
->loc
);
13788 /* Add the hidden deferred length field. */
13789 if (c
->ts
.type
== BT_CHARACTER
13790 && (c
->ts
.deferred
|| c
->attr
.pdt_string
)
13791 && !c
->attr
.function
13792 && !sym
->attr
.is_class
)
13794 char name
[GFC_MAX_SYMBOL_LEN
+9];
13795 gfc_component
*strlen
;
13796 sprintf (name
, "_%s_length", c
->name
);
13797 strlen
= gfc_find_component (sym
, name
, true, true, NULL
);
13798 if (strlen
== NULL
)
13800 if (!gfc_add_component (sym
, name
, &strlen
))
13802 strlen
->ts
.type
= BT_INTEGER
;
13803 strlen
->ts
.kind
= gfc_charlen_int_kind
;
13804 strlen
->attr
.access
= ACCESS_PRIVATE
;
13805 strlen
->attr
.artificial
= 1;
13809 if (c
->ts
.type
== BT_DERIVED
13810 && sym
->component_access
!= ACCESS_PRIVATE
13811 && gfc_check_symbol_access (sym
)
13812 && !is_sym_host_assoc (c
->ts
.u
.derived
, sym
->ns
)
13813 && !c
->ts
.u
.derived
->attr
.use_assoc
13814 && !gfc_check_symbol_access (c
->ts
.u
.derived
)
13815 && !gfc_notify_std (GFC_STD_F2003
, "the component %qs is a "
13816 "PRIVATE type and cannot be a component of "
13817 "%qs, which is PUBLIC at %L", c
->name
,
13818 sym
->name
, &sym
->declared_at
))
13821 if ((sym
->attr
.sequence
|| sym
->attr
.is_bind_c
) && c
->ts
.type
== BT_CLASS
)
13823 gfc_error ("Polymorphic component %s at %L in SEQUENCE or BIND(C) "
13824 "type %s", c
->name
, &c
->loc
, sym
->name
);
13828 if (sym
->attr
.sequence
)
13830 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.sequence
== 0)
13832 gfc_error ("Component %s of SEQUENCE type declared at %L does "
13833 "not have the SEQUENCE attribute",
13834 c
->ts
.u
.derived
->name
, &sym
->declared_at
);
13839 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.generic
)
13840 c
->ts
.u
.derived
= gfc_find_dt_in_generic (c
->ts
.u
.derived
);
13841 else if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
13842 && CLASS_DATA (c
)->ts
.u
.derived
->attr
.generic
)
13843 CLASS_DATA (c
)->ts
.u
.derived
13844 = gfc_find_dt_in_generic (CLASS_DATA (c
)->ts
.u
.derived
);
13846 if (!sym
->attr
.is_class
&& c
->ts
.type
== BT_DERIVED
&& !sym
->attr
.vtype
13847 && c
->attr
.pointer
&& c
->ts
.u
.derived
->components
== NULL
13848 && !c
->ts
.u
.derived
->attr
.zero_comp
)
13850 gfc_error ("The pointer component %qs of %qs at %L is a type "
13851 "that has not been declared", c
->name
, sym
->name
,
13856 if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
13857 && CLASS_DATA (c
)->attr
.class_pointer
13858 && CLASS_DATA (c
)->ts
.u
.derived
->components
== NULL
13859 && !CLASS_DATA (c
)->ts
.u
.derived
->attr
.zero_comp
13860 && !UNLIMITED_POLY (c
))
13862 gfc_error ("The pointer component %qs of %qs at %L is a type "
13863 "that has not been declared", c
->name
, sym
->name
,
13868 /* If an allocatable component derived type is of the same type as
13869 the enclosing derived type, we need a vtable generating so that
13870 the __deallocate procedure is created. */
13871 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
13872 && c
->ts
.u
.derived
== sym
&& c
->attr
.allocatable
== 1)
13873 gfc_find_vtab (&c
->ts
);
13875 /* Ensure that all the derived type components are put on the
13876 derived type list; even in formal namespaces, where derived type
13877 pointer components might not have been declared. */
13878 if (c
->ts
.type
== BT_DERIVED
13880 && c
->ts
.u
.derived
->components
13882 && sym
!= c
->ts
.u
.derived
)
13883 add_dt_to_dt_list (c
->ts
.u
.derived
);
13885 if (!gfc_resolve_array_spec (c
->as
,
13886 !(c
->attr
.pointer
|| c
->attr
.proc_pointer
13887 || c
->attr
.allocatable
)))
13890 if (c
->initializer
&& !sym
->attr
.vtype
13891 && !c
->attr
.pdt_kind
&& !c
->attr
.pdt_len
13892 && !gfc_check_assign_symbol (sym
, c
, c
->initializer
))
13899 /* Be nice about the locus for a structure expression - show the locus of the
13900 first non-null sub-expression if we can. */
13903 cons_where (gfc_expr
*struct_expr
)
13905 gfc_constructor
*cons
;
13907 gcc_assert (struct_expr
&& struct_expr
->expr_type
== EXPR_STRUCTURE
);
13909 cons
= gfc_constructor_first (struct_expr
->value
.constructor
);
13910 for (; cons
; cons
= gfc_constructor_next (cons
))
13912 if (cons
->expr
&& cons
->expr
->expr_type
!= EXPR_NULL
)
13913 return &cons
->expr
->where
;
13916 return &struct_expr
->where
;
13919 /* Resolve the components of a structure type. Much less work than derived
13923 resolve_fl_struct (gfc_symbol
*sym
)
13926 gfc_expr
*init
= NULL
;
13929 /* Make sure UNIONs do not have overlapping initializers. */
13930 if (sym
->attr
.flavor
== FL_UNION
)
13932 for (c
= sym
->components
; c
; c
= c
->next
)
13934 if (init
&& c
->initializer
)
13936 gfc_error ("Conflicting initializers in union at %L and %L",
13937 cons_where (init
), cons_where (c
->initializer
));
13938 gfc_free_expr (c
->initializer
);
13939 c
->initializer
= NULL
;
13942 init
= c
->initializer
;
13947 for (c
= sym
->components
; c
; c
= c
->next
)
13948 if (!resolve_component (c
, sym
))
13954 if (sym
->components
)
13955 add_dt_to_dt_list (sym
);
13961 /* Resolve the components of a derived type. This does not have to wait until
13962 resolution stage, but can be done as soon as the dt declaration has been
13966 resolve_fl_derived0 (gfc_symbol
*sym
)
13968 gfc_symbol
* super_type
;
13970 gfc_formal_arglist
*f
;
13973 if (sym
->attr
.unlimited_polymorphic
)
13976 super_type
= gfc_get_derived_super_type (sym
);
13979 if (super_type
&& sym
->attr
.coarray_comp
&& !super_type
->attr
.coarray_comp
)
13981 gfc_error ("As extending type %qs at %L has a coarray component, "
13982 "parent type %qs shall also have one", sym
->name
,
13983 &sym
->declared_at
, super_type
->name
);
13987 /* Ensure the extended type gets resolved before we do. */
13988 if (super_type
&& !resolve_fl_derived0 (super_type
))
13991 /* An ABSTRACT type must be extensible. */
13992 if (sym
->attr
.abstract
&& !gfc_type_is_extensible (sym
))
13994 gfc_error ("Non-extensible derived-type %qs at %L must not be ABSTRACT",
13995 sym
->name
, &sym
->declared_at
);
13999 c
= (sym
->attr
.is_class
) ? sym
->components
->ts
.u
.derived
->components
14003 for ( ; c
!= NULL
; c
= c
->next
)
14004 if (!resolve_component (c
, sym
))
14010 /* Now add the caf token field, where needed. */
14011 if (flag_coarray
!= GFC_FCOARRAY_NONE
14012 && !sym
->attr
.is_class
&& !sym
->attr
.vtype
)
14014 for (c
= sym
->components
; c
; c
= c
->next
)
14015 if (!c
->attr
.dimension
&& !c
->attr
.codimension
14016 && (c
->attr
.allocatable
|| c
->attr
.pointer
))
14018 char name
[GFC_MAX_SYMBOL_LEN
+9];
14019 gfc_component
*token
;
14020 sprintf (name
, "_caf_%s", c
->name
);
14021 token
= gfc_find_component (sym
, name
, true, true, NULL
);
14024 if (!gfc_add_component (sym
, name
, &token
))
14026 token
->ts
.type
= BT_VOID
;
14027 token
->ts
.kind
= gfc_default_integer_kind
;
14028 token
->attr
.access
= ACCESS_PRIVATE
;
14029 token
->attr
.artificial
= 1;
14030 token
->attr
.caf_token
= 1;
14035 check_defined_assignments (sym
);
14037 if (!sym
->attr
.defined_assign_comp
&& super_type
)
14038 sym
->attr
.defined_assign_comp
14039 = super_type
->attr
.defined_assign_comp
;
14041 /* If this is a non-ABSTRACT type extending an ABSTRACT one, ensure that
14042 all DEFERRED bindings are overridden. */
14043 if (super_type
&& super_type
->attr
.abstract
&& !sym
->attr
.abstract
14044 && !sym
->attr
.is_class
14045 && !ensure_not_abstract (sym
, super_type
))
14048 /* Check that there is a component for every PDT parameter. */
14049 if (sym
->attr
.pdt_template
)
14051 for (f
= sym
->formal
; f
; f
= f
->next
)
14055 c
= gfc_find_component (sym
, f
->sym
->name
, true, true, NULL
);
14058 gfc_error ("Parameterized type %qs does not have a component "
14059 "corresponding to parameter %qs at %L", sym
->name
,
14060 f
->sym
->name
, &sym
->declared_at
);
14066 /* Add derived type to the derived type list. */
14067 add_dt_to_dt_list (sym
);
14073 /* The following procedure does the full resolution of a derived type,
14074 including resolution of all type-bound procedures (if present). In contrast
14075 to 'resolve_fl_derived0' this can only be done after the module has been
14076 parsed completely. */
14079 resolve_fl_derived (gfc_symbol
*sym
)
14081 gfc_symbol
*gen_dt
= NULL
;
14083 if (sym
->attr
.unlimited_polymorphic
)
14086 if (!sym
->attr
.is_class
)
14087 gfc_find_symbol (sym
->name
, sym
->ns
, 0, &gen_dt
);
14088 if (gen_dt
&& gen_dt
->generic
&& gen_dt
->generic
->next
14089 && (!gen_dt
->generic
->sym
->attr
.use_assoc
14090 || gen_dt
->generic
->sym
->module
!= gen_dt
->generic
->next
->sym
->module
)
14091 && !gfc_notify_std (GFC_STD_F2003
, "Generic name %qs of function "
14092 "%qs at %L being the same name as derived "
14093 "type at %L", sym
->name
,
14094 gen_dt
->generic
->sym
== sym
14095 ? gen_dt
->generic
->next
->sym
->name
14096 : gen_dt
->generic
->sym
->name
,
14097 gen_dt
->generic
->sym
== sym
14098 ? &gen_dt
->generic
->next
->sym
->declared_at
14099 : &gen_dt
->generic
->sym
->declared_at
,
14100 &sym
->declared_at
))
14103 /* Resolve the finalizer procedures. */
14104 if (!gfc_resolve_finalizers (sym
, NULL
))
14107 if (sym
->attr
.is_class
&& sym
->ts
.u
.derived
== NULL
)
14109 /* Fix up incomplete CLASS symbols. */
14110 gfc_component
*data
= gfc_find_component (sym
, "_data", true, true, NULL
);
14111 gfc_component
*vptr
= gfc_find_component (sym
, "_vptr", true, true, NULL
);
14113 /* Nothing more to do for unlimited polymorphic entities. */
14114 if (data
->ts
.u
.derived
->attr
.unlimited_polymorphic
)
14116 else if (vptr
->ts
.u
.derived
== NULL
)
14118 gfc_symbol
*vtab
= gfc_find_derived_vtab (data
->ts
.u
.derived
);
14120 vptr
->ts
.u
.derived
= vtab
->ts
.u
.derived
;
14121 if (!resolve_fl_derived0 (vptr
->ts
.u
.derived
))
14126 if (!resolve_fl_derived0 (sym
))
14129 /* Resolve the type-bound procedures. */
14130 if (!resolve_typebound_procedures (sym
))
14133 /* Generate module vtables subject to their accessibility and their not
14134 being vtables or pdt templates. If this is not done class declarations
14135 in external procedures wind up with their own version and so SELECT TYPE
14136 fails because the vptrs do not have the same address. */
14137 if (gfc_option
.allow_std
& GFC_STD_F2003
14138 && sym
->ns
->proc_name
14139 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14140 && sym
->attr
.access
!= ACCESS_PRIVATE
14141 && !(sym
->attr
.use_assoc
|| sym
->attr
.vtype
|| sym
->attr
.pdt_template
))
14143 gfc_symbol
*vtab
= gfc_find_derived_vtab (sym
);
14144 gfc_set_sym_referenced (vtab
);
14152 resolve_fl_namelist (gfc_symbol
*sym
)
14157 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14159 /* Check again, the check in match only works if NAMELIST comes
14161 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SIZE
)
14163 gfc_error ("Assumed size array %qs in namelist %qs at %L is not "
14164 "allowed", nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14168 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SHAPE
14169 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14170 "with assumed shape in namelist %qs at %L",
14171 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14174 if (is_non_constant_shape_array (nl
->sym
)
14175 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14176 "with nonconstant shape in namelist %qs at %L",
14177 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14180 if (nl
->sym
->ts
.type
== BT_CHARACTER
14181 && (nl
->sym
->ts
.u
.cl
->length
== NULL
14182 || !gfc_is_constant_expr (nl
->sym
->ts
.u
.cl
->length
))
14183 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs with "
14184 "nonconstant character length in "
14185 "namelist %qs at %L", nl
->sym
->name
,
14186 sym
->name
, &sym
->declared_at
))
14191 /* Reject PRIVATE objects in a PUBLIC namelist. */
14192 if (gfc_check_symbol_access (sym
))
14194 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14196 if (!nl
->sym
->attr
.use_assoc
14197 && !is_sym_host_assoc (nl
->sym
, sym
->ns
)
14198 && !gfc_check_symbol_access (nl
->sym
))
14200 gfc_error ("NAMELIST object %qs was declared PRIVATE and "
14201 "cannot be member of PUBLIC namelist %qs at %L",
14202 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14206 if (nl
->sym
->ts
.type
== BT_DERIVED
14207 && (nl
->sym
->ts
.u
.derived
->attr
.alloc_comp
14208 || nl
->sym
->ts
.u
.derived
->attr
.pointer_comp
))
14210 if (!gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs in "
14211 "namelist %qs at %L with ALLOCATABLE "
14212 "or POINTER components", nl
->sym
->name
,
14213 sym
->name
, &sym
->declared_at
))
14218 /* Types with private components that came here by USE-association. */
14219 if (nl
->sym
->ts
.type
== BT_DERIVED
14220 && derived_inaccessible (nl
->sym
->ts
.u
.derived
))
14222 gfc_error ("NAMELIST object %qs has use-associated PRIVATE "
14223 "components and cannot be member of namelist %qs at %L",
14224 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14228 /* Types with private components that are defined in the same module. */
14229 if (nl
->sym
->ts
.type
== BT_DERIVED
14230 && !is_sym_host_assoc (nl
->sym
->ts
.u
.derived
, sym
->ns
)
14231 && nl
->sym
->ts
.u
.derived
->attr
.private_comp
)
14233 gfc_error ("NAMELIST object %qs has PRIVATE components and "
14234 "cannot be a member of PUBLIC namelist %qs at %L",
14235 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14242 /* 14.1.2 A module or internal procedure represent local entities
14243 of the same type as a namelist member and so are not allowed. */
14244 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14246 if (nl
->sym
->ts
.kind
!= 0 && nl
->sym
->attr
.flavor
== FL_VARIABLE
)
14249 if (nl
->sym
->attr
.function
&& nl
->sym
== nl
->sym
->result
)
14250 if ((nl
->sym
== sym
->ns
->proc_name
)
14252 (sym
->ns
->parent
&& nl
->sym
== sym
->ns
->parent
->proc_name
))
14257 gfc_find_symbol (nl
->sym
->name
, sym
->ns
, 1, &nlsym
);
14258 if (nlsym
&& nlsym
->attr
.flavor
== FL_PROCEDURE
)
14260 gfc_error ("PROCEDURE attribute conflicts with NAMELIST "
14261 "attribute in %qs at %L", nlsym
->name
,
14262 &sym
->declared_at
);
14269 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14270 nl
->sym
->attr
.asynchronous
= 1;
14277 resolve_fl_parameter (gfc_symbol
*sym
)
14279 /* A parameter array's shape needs to be constant. */
14280 if (sym
->as
!= NULL
14281 && (sym
->as
->type
== AS_DEFERRED
14282 || is_non_constant_shape_array (sym
)))
14284 gfc_error ("Parameter array %qs at %L cannot be automatic "
14285 "or of deferred shape", sym
->name
, &sym
->declared_at
);
14289 /* Constraints on deferred type parameter. */
14290 if (!deferred_requirements (sym
))
14293 /* Make sure a parameter that has been implicitly typed still
14294 matches the implicit type, since PARAMETER statements can precede
14295 IMPLICIT statements. */
14296 if (sym
->attr
.implicit_type
14297 && !gfc_compare_types (&sym
->ts
, gfc_get_default_type (sym
->name
,
14300 gfc_error ("Implicitly typed PARAMETER %qs at %L doesn't match a "
14301 "later IMPLICIT type", sym
->name
, &sym
->declared_at
);
14305 /* Make sure the types of derived parameters are consistent. This
14306 type checking is deferred until resolution because the type may
14307 refer to a derived type from the host. */
14308 if (sym
->ts
.type
== BT_DERIVED
14309 && !gfc_compare_types (&sym
->ts
, &sym
->value
->ts
))
14311 gfc_error ("Incompatible derived type in PARAMETER at %L",
14312 &sym
->value
->where
);
14316 /* F03:C509,C514. */
14317 if (sym
->ts
.type
== BT_CLASS
)
14319 gfc_error ("CLASS variable %qs at %L cannot have the PARAMETER attribute",
14320 sym
->name
, &sym
->declared_at
);
14328 /* Called by resolve_symbol to check PDTs. */
14331 resolve_pdt (gfc_symbol
* sym
)
14333 gfc_symbol
*derived
= NULL
;
14334 gfc_actual_arglist
*param
;
14336 bool const_len_exprs
= true;
14337 bool assumed_len_exprs
= false;
14338 symbol_attribute
*attr
;
14340 if (sym
->ts
.type
== BT_DERIVED
)
14342 derived
= sym
->ts
.u
.derived
;
14343 attr
= &(sym
->attr
);
14345 else if (sym
->ts
.type
== BT_CLASS
)
14347 derived
= CLASS_DATA (sym
)->ts
.u
.derived
;
14348 attr
= &(CLASS_DATA (sym
)->attr
);
14351 gcc_unreachable ();
14353 gcc_assert (derived
->attr
.pdt_type
);
14355 for (param
= sym
->param_list
; param
; param
= param
->next
)
14357 c
= gfc_find_component (derived
, param
->name
, false, true, NULL
);
14359 if (c
->attr
.pdt_kind
)
14362 if (param
->expr
&& !gfc_is_constant_expr (param
->expr
)
14363 && c
->attr
.pdt_len
)
14364 const_len_exprs
= false;
14365 else if (param
->spec_type
== SPEC_ASSUMED
)
14366 assumed_len_exprs
= true;
14368 if (param
->spec_type
== SPEC_DEFERRED
14369 && !attr
->allocatable
&& !attr
->pointer
)
14370 gfc_error ("The object %qs at %L has a deferred LEN "
14371 "parameter %qs and is neither allocatable "
14372 "nor a pointer", sym
->name
, &sym
->declared_at
,
14377 if (!const_len_exprs
14378 && (sym
->ns
->proc_name
->attr
.is_main_program
14379 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14380 || sym
->attr
.save
!= SAVE_NONE
))
14381 gfc_error ("The AUTOMATIC object %qs at %L must not have the "
14382 "SAVE attribute or be a variable declared in the "
14383 "main program, a module or a submodule(F08/C513)",
14384 sym
->name
, &sym
->declared_at
);
14386 if (assumed_len_exprs
&& !(sym
->attr
.dummy
14387 || sym
->attr
.select_type_temporary
|| sym
->attr
.associate_var
))
14388 gfc_error ("The object %qs at %L with ASSUMED type parameters "
14389 "must be a dummy or a SELECT TYPE selector(F08/4.2)",
14390 sym
->name
, &sym
->declared_at
);
14394 /* Do anything necessary to resolve a symbol. Right now, we just
14395 assume that an otherwise unknown symbol is a variable. This sort
14396 of thing commonly happens for symbols in module. */
14399 resolve_symbol (gfc_symbol
*sym
)
14401 int check_constant
, mp_flag
;
14402 gfc_symtree
*symtree
;
14403 gfc_symtree
*this_symtree
;
14406 symbol_attribute class_attr
;
14407 gfc_array_spec
*as
;
14408 bool saved_specification_expr
;
14414 /* No symbol will ever have union type; only components can be unions.
14415 Union type declaration symbols have type BT_UNKNOWN but flavor FL_UNION
14416 (just like derived type declaration symbols have flavor FL_DERIVED). */
14417 gcc_assert (sym
->ts
.type
!= BT_UNION
);
14419 /* Coarrayed polymorphic objects with allocatable or pointer components are
14420 yet unsupported for -fcoarray=lib. */
14421 if (flag_coarray
== GFC_FCOARRAY_LIB
&& sym
->ts
.type
== BT_CLASS
14422 && sym
->ts
.u
.derived
&& CLASS_DATA (sym
)
14423 && CLASS_DATA (sym
)->attr
.codimension
14424 && (CLASS_DATA (sym
)->ts
.u
.derived
->attr
.alloc_comp
14425 || CLASS_DATA (sym
)->ts
.u
.derived
->attr
.pointer_comp
))
14427 gfc_error ("Sorry, allocatable/pointer components in polymorphic (CLASS) "
14428 "type coarrays at %L are unsupported", &sym
->declared_at
);
14432 if (sym
->attr
.artificial
)
14435 if (sym
->attr
.unlimited_polymorphic
)
14438 if (sym
->attr
.flavor
== FL_UNKNOWN
14439 || (sym
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.intrinsic
14440 && !sym
->attr
.generic
&& !sym
->attr
.external
14441 && sym
->attr
.if_source
== IFSRC_UNKNOWN
14442 && sym
->ts
.type
== BT_UNKNOWN
))
14445 /* If we find that a flavorless symbol is an interface in one of the
14446 parent namespaces, find its symtree in this namespace, free the
14447 symbol and set the symtree to point to the interface symbol. */
14448 for (ns
= gfc_current_ns
->parent
; ns
; ns
= ns
->parent
)
14450 symtree
= gfc_find_symtree (ns
->sym_root
, sym
->name
);
14451 if (symtree
&& (symtree
->n
.sym
->generic
||
14452 (symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
14453 && sym
->ns
->construct_entities
)))
14455 this_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
14457 if (this_symtree
->n
.sym
== sym
)
14459 symtree
->n
.sym
->refs
++;
14460 gfc_release_symbol (sym
);
14461 this_symtree
->n
.sym
= symtree
->n
.sym
;
14467 /* Otherwise give it a flavor according to such attributes as
14469 if (sym
->attr
.flavor
== FL_UNKNOWN
&& sym
->attr
.external
== 0
14470 && sym
->attr
.intrinsic
== 0)
14471 sym
->attr
.flavor
= FL_VARIABLE
;
14472 else if (sym
->attr
.flavor
== FL_UNKNOWN
)
14474 sym
->attr
.flavor
= FL_PROCEDURE
;
14475 if (sym
->attr
.dimension
)
14476 sym
->attr
.function
= 1;
14480 if (sym
->attr
.external
&& sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.function
)
14481 gfc_add_function (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14483 if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
14484 && !resolve_procedure_interface (sym
))
14487 if (sym
->attr
.is_protected
&& !sym
->attr
.proc_pointer
14488 && (sym
->attr
.procedure
|| sym
->attr
.external
))
14490 if (sym
->attr
.external
)
14491 gfc_error ("PROTECTED attribute conflicts with EXTERNAL attribute "
14492 "at %L", &sym
->declared_at
);
14494 gfc_error ("PROCEDURE attribute conflicts with PROTECTED attribute "
14495 "at %L", &sym
->declared_at
);
14500 if (sym
->attr
.flavor
== FL_DERIVED
&& !resolve_fl_derived (sym
))
14503 else if ((sym
->attr
.flavor
== FL_STRUCT
|| sym
->attr
.flavor
== FL_UNION
)
14504 && !resolve_fl_struct (sym
))
14507 /* Symbols that are module procedures with results (functions) have
14508 the types and array specification copied for type checking in
14509 procedures that call them, as well as for saving to a module
14510 file. These symbols can't stand the scrutiny that their results
14512 mp_flag
= (sym
->result
!= NULL
&& sym
->result
!= sym
);
14514 /* Make sure that the intrinsic is consistent with its internal
14515 representation. This needs to be done before assigning a default
14516 type to avoid spurious warnings. */
14517 if (sym
->attr
.flavor
!= FL_MODULE
&& sym
->attr
.intrinsic
14518 && !gfc_resolve_intrinsic (sym
, &sym
->declared_at
))
14521 /* Resolve associate names. */
14523 resolve_assoc_var (sym
, true);
14525 /* Assign default type to symbols that need one and don't have one. */
14526 if (sym
->ts
.type
== BT_UNKNOWN
)
14528 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
)
14530 gfc_set_default_type (sym
, 1, NULL
);
14533 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.external
14534 && !sym
->attr
.function
&& !sym
->attr
.subroutine
14535 && gfc_get_default_type (sym
->name
, sym
->ns
)->type
== BT_UNKNOWN
)
14536 gfc_add_subroutine (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14538 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14540 /* The specific case of an external procedure should emit an error
14541 in the case that there is no implicit type. */
14544 if (!sym
->attr
.mixed_entry_master
)
14545 gfc_set_default_type (sym
, sym
->attr
.external
, NULL
);
14549 /* Result may be in another namespace. */
14550 resolve_symbol (sym
->result
);
14552 if (!sym
->result
->attr
.proc_pointer
)
14554 sym
->ts
= sym
->result
->ts
;
14555 sym
->as
= gfc_copy_array_spec (sym
->result
->as
);
14556 sym
->attr
.dimension
= sym
->result
->attr
.dimension
;
14557 sym
->attr
.pointer
= sym
->result
->attr
.pointer
;
14558 sym
->attr
.allocatable
= sym
->result
->attr
.allocatable
;
14559 sym
->attr
.contiguous
= sym
->result
->attr
.contiguous
;
14564 else if (mp_flag
&& sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14566 bool saved_specification_expr
= specification_expr
;
14567 specification_expr
= true;
14568 gfc_resolve_array_spec (sym
->result
->as
, false);
14569 specification_expr
= saved_specification_expr
;
14572 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
14574 as
= CLASS_DATA (sym
)->as
;
14575 class_attr
= CLASS_DATA (sym
)->attr
;
14576 class_attr
.pointer
= class_attr
.class_pointer
;
14580 class_attr
= sym
->attr
;
14585 if (sym
->attr
.contiguous
14586 && (!class_attr
.dimension
14587 || (as
->type
!= AS_ASSUMED_SHAPE
&& as
->type
!= AS_ASSUMED_RANK
14588 && !class_attr
.pointer
)))
14590 gfc_error ("%qs at %L has the CONTIGUOUS attribute but is not an "
14591 "array pointer or an assumed-shape or assumed-rank array",
14592 sym
->name
, &sym
->declared_at
);
14596 /* Assumed size arrays and assumed shape arrays must be dummy
14597 arguments. Array-spec's of implied-shape should have been resolved to
14598 AS_EXPLICIT already. */
14602 /* If AS_IMPLIED_SHAPE makes it to here, it must be a bad
14603 specification expression. */
14604 if (as
->type
== AS_IMPLIED_SHAPE
)
14607 for (i
=0; i
<as
->rank
; i
++)
14609 if (as
->lower
[i
] != NULL
&& as
->upper
[i
] == NULL
)
14611 gfc_error ("Bad specification for assumed size array at %L",
14612 &as
->lower
[i
]->where
);
14619 if (((as
->type
== AS_ASSUMED_SIZE
&& !as
->cp_was_assumed
)
14620 || as
->type
== AS_ASSUMED_SHAPE
)
14621 && !sym
->attr
.dummy
&& !sym
->attr
.select_type_temporary
)
14623 if (as
->type
== AS_ASSUMED_SIZE
)
14624 gfc_error ("Assumed size array at %L must be a dummy argument",
14625 &sym
->declared_at
);
14627 gfc_error ("Assumed shape array at %L must be a dummy argument",
14628 &sym
->declared_at
);
14631 /* TS 29113, C535a. */
14632 if (as
->type
== AS_ASSUMED_RANK
&& !sym
->attr
.dummy
14633 && !sym
->attr
.select_type_temporary
)
14635 gfc_error ("Assumed-rank array at %L must be a dummy argument",
14636 &sym
->declared_at
);
14639 if (as
->type
== AS_ASSUMED_RANK
14640 && (sym
->attr
.codimension
|| sym
->attr
.value
))
14642 gfc_error ("Assumed-rank array at %L may not have the VALUE or "
14643 "CODIMENSION attribute", &sym
->declared_at
);
14648 /* Make sure symbols with known intent or optional are really dummy
14649 variable. Because of ENTRY statement, this has to be deferred
14650 until resolution time. */
14652 if (!sym
->attr
.dummy
14653 && (sym
->attr
.optional
|| sym
->attr
.intent
!= INTENT_UNKNOWN
))
14655 gfc_error ("Symbol at %L is not a DUMMY variable", &sym
->declared_at
);
14659 if (sym
->attr
.value
&& !sym
->attr
.dummy
)
14661 gfc_error ("%qs at %L cannot have the VALUE attribute because "
14662 "it is not a dummy argument", sym
->name
, &sym
->declared_at
);
14666 if (sym
->attr
.value
&& sym
->ts
.type
== BT_CHARACTER
)
14668 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
14669 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
14671 gfc_error ("Character dummy variable %qs at %L with VALUE "
14672 "attribute must have constant length",
14673 sym
->name
, &sym
->declared_at
);
14677 if (sym
->ts
.is_c_interop
14678 && mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
14680 gfc_error ("C interoperable character dummy variable %qs at %L "
14681 "with VALUE attribute must have length one",
14682 sym
->name
, &sym
->declared_at
);
14687 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
14688 && sym
->ts
.u
.derived
->attr
.generic
)
14690 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
14691 if (!sym
->ts
.u
.derived
)
14693 gfc_error ("The derived type %qs at %L is of type %qs, "
14694 "which has not been defined", sym
->name
,
14695 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
14696 sym
->ts
.type
= BT_UNKNOWN
;
14701 /* Use the same constraints as TYPE(*), except for the type check
14702 and that only scalars and assumed-size arrays are permitted. */
14703 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
14705 if (!sym
->attr
.dummy
)
14707 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14708 "a dummy argument", sym
->name
, &sym
->declared_at
);
14712 if (sym
->ts
.type
!= BT_ASSUMED
&& sym
->ts
.type
!= BT_INTEGER
14713 && sym
->ts
.type
!= BT_REAL
&& sym
->ts
.type
!= BT_LOGICAL
14714 && sym
->ts
.type
!= BT_COMPLEX
)
14716 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14717 "of type TYPE(*) or of an numeric intrinsic type",
14718 sym
->name
, &sym
->declared_at
);
14722 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
14723 || sym
->attr
.pointer
|| sym
->attr
.value
)
14725 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
14726 "have the ALLOCATABLE, CODIMENSION, POINTER or VALUE "
14727 "attribute", sym
->name
, &sym
->declared_at
);
14731 if (sym
->attr
.intent
== INTENT_OUT
)
14733 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
14734 "have the INTENT(OUT) attribute",
14735 sym
->name
, &sym
->declared_at
);
14738 if (sym
->attr
.dimension
&& sym
->as
->type
!= AS_ASSUMED_SIZE
)
14740 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall "
14741 "either be a scalar or an assumed-size array",
14742 sym
->name
, &sym
->declared_at
);
14746 /* Set the type to TYPE(*) and add a dimension(*) to ensure
14747 NO_ARG_CHECK is correctly handled in trans*.c, e.g. with
14749 sym
->ts
.type
= BT_ASSUMED
;
14750 sym
->as
= gfc_get_array_spec ();
14751 sym
->as
->type
= AS_ASSUMED_SIZE
;
14753 sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
14755 else if (sym
->ts
.type
== BT_ASSUMED
)
14757 /* TS 29113, C407a. */
14758 if (!sym
->attr
.dummy
)
14760 gfc_error ("Assumed type of variable %s at %L is only permitted "
14761 "for dummy variables", sym
->name
, &sym
->declared_at
);
14764 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
14765 || sym
->attr
.pointer
|| sym
->attr
.value
)
14767 gfc_error ("Assumed-type variable %s at %L may not have the "
14768 "ALLOCATABLE, CODIMENSION, POINTER or VALUE attribute",
14769 sym
->name
, &sym
->declared_at
);
14772 if (sym
->attr
.intent
== INTENT_OUT
)
14774 gfc_error ("Assumed-type variable %s at %L may not have the "
14775 "INTENT(OUT) attribute",
14776 sym
->name
, &sym
->declared_at
);
14779 if (sym
->attr
.dimension
&& sym
->as
->type
== AS_EXPLICIT
)
14781 gfc_error ("Assumed-type variable %s at %L shall not be an "
14782 "explicit-shape array", sym
->name
, &sym
->declared_at
);
14787 /* If the symbol is marked as bind(c), that it is declared at module level
14788 scope and verify its type and kind. Do not do the latter for symbols
14789 that are implicitly typed because that is handled in
14790 gfc_set_default_type. Handle dummy arguments and procedure definitions
14791 separately. Also, anything that is use associated is not handled here
14792 but instead is handled in the module it is declared in. Finally, derived
14793 type definitions are allowed to be BIND(C) since that only implies that
14794 they're interoperable, and they are checked fully for interoperability
14795 when a variable is declared of that type. */
14796 if (sym
->attr
.is_bind_c
&& sym
->attr
.use_assoc
== 0
14797 && sym
->attr
.dummy
== 0 && sym
->attr
.flavor
!= FL_PROCEDURE
14798 && sym
->attr
.flavor
!= FL_DERIVED
)
14802 /* First, make sure the variable is declared at the
14803 module-level scope (J3/04-007, Section 15.3). */
14804 if (sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
&&
14805 sym
->attr
.in_common
== 0)
14807 gfc_error ("Variable %qs at %L cannot be BIND(C) because it "
14808 "is neither a COMMON block nor declared at the "
14809 "module level scope", sym
->name
, &(sym
->declared_at
));
14812 else if (sym
->common_head
!= NULL
&& sym
->attr
.implicit_type
== 0)
14814 t
= verify_com_block_vars_c_interop (sym
->common_head
);
14816 else if (sym
->attr
.implicit_type
== 0)
14818 /* If type() declaration, we need to verify that the components
14819 of the given type are all C interoperable, etc. */
14820 if (sym
->ts
.type
== BT_DERIVED
&&
14821 sym
->ts
.u
.derived
->attr
.is_c_interop
!= 1)
14823 /* Make sure the user marked the derived type as BIND(C). If
14824 not, call the verify routine. This could print an error
14825 for the derived type more than once if multiple variables
14826 of that type are declared. */
14827 if (sym
->ts
.u
.derived
->attr
.is_bind_c
!= 1)
14828 verify_bind_c_derived_type (sym
->ts
.u
.derived
);
14832 /* Verify the variable itself as C interoperable if it
14833 is BIND(C). It is not possible for this to succeed if
14834 the verify_bind_c_derived_type failed, so don't have to handle
14835 any error returned by verify_bind_c_derived_type. */
14836 t
= verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
14837 sym
->common_block
);
14842 /* clear the is_bind_c flag to prevent reporting errors more than
14843 once if something failed. */
14844 sym
->attr
.is_bind_c
= 0;
14849 /* If a derived type symbol has reached this point, without its
14850 type being declared, we have an error. Notice that most
14851 conditions that produce undefined derived types have already
14852 been dealt with. However, the likes of:
14853 implicit type(t) (t) ..... call foo (t) will get us here if
14854 the type is not declared in the scope of the implicit
14855 statement. Change the type to BT_UNKNOWN, both because it is so
14856 and to prevent an ICE. */
14857 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
14858 && sym
->ts
.u
.derived
->components
== NULL
14859 && !sym
->ts
.u
.derived
->attr
.zero_comp
)
14861 gfc_error ("The derived type %qs at %L is of type %qs, "
14862 "which has not been defined", sym
->name
,
14863 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
14864 sym
->ts
.type
= BT_UNKNOWN
;
14868 /* Make sure that the derived type has been resolved and that the
14869 derived type is visible in the symbol's namespace, if it is a
14870 module function and is not PRIVATE. */
14871 if (sym
->ts
.type
== BT_DERIVED
14872 && sym
->ts
.u
.derived
->attr
.use_assoc
14873 && sym
->ns
->proc_name
14874 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14875 && !resolve_fl_derived (sym
->ts
.u
.derived
))
14878 /* Unless the derived-type declaration is use associated, Fortran 95
14879 does not allow public entries of private derived types.
14880 See 4.4.1 (F95) and 4.5.1.1 (F2003); and related interpretation
14881 161 in 95-006r3. */
14882 if (sym
->ts
.type
== BT_DERIVED
14883 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14884 && !sym
->ts
.u
.derived
->attr
.use_assoc
14885 && gfc_check_symbol_access (sym
)
14886 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
14887 && !gfc_notify_std (GFC_STD_F2003
, "PUBLIC %s %qs at %L of PRIVATE "
14888 "derived type %qs",
14889 (sym
->attr
.flavor
== FL_PARAMETER
)
14890 ? "parameter" : "variable",
14891 sym
->name
, &sym
->declared_at
,
14892 sym
->ts
.u
.derived
->name
))
14895 /* F2008, C1302. */
14896 if (sym
->ts
.type
== BT_DERIVED
14897 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
14898 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
14899 || sym
->ts
.u
.derived
->attr
.lock_comp
)
14900 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
14902 gfc_error ("Variable %s at %L of type LOCK_TYPE or with subcomponent of "
14903 "type LOCK_TYPE must be a coarray", sym
->name
,
14904 &sym
->declared_at
);
14908 /* TS18508, C702/C703. */
14909 if (sym
->ts
.type
== BT_DERIVED
14910 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
14911 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
14912 || sym
->ts
.u
.derived
->attr
.event_comp
)
14913 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
14915 gfc_error ("Variable %s at %L of type EVENT_TYPE or with subcomponent of "
14916 "type EVENT_TYPE must be a coarray", sym
->name
,
14917 &sym
->declared_at
);
14921 /* An assumed-size array with INTENT(OUT) shall not be of a type for which
14922 default initialization is defined (5.1.2.4.4). */
14923 if (sym
->ts
.type
== BT_DERIVED
14925 && sym
->attr
.intent
== INTENT_OUT
14927 && sym
->as
->type
== AS_ASSUMED_SIZE
)
14929 for (c
= sym
->ts
.u
.derived
->components
; c
; c
= c
->next
)
14931 if (c
->initializer
)
14933 gfc_error ("The INTENT(OUT) dummy argument %qs at %L is "
14934 "ASSUMED SIZE and so cannot have a default initializer",
14935 sym
->name
, &sym
->declared_at
);
14942 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
14943 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.lock_comp
)
14945 gfc_error ("Dummy argument %qs at %L of LOCK_TYPE shall not be "
14946 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
14951 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
14952 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.event_comp
)
14954 gfc_error ("Dummy argument %qs at %L of EVENT_TYPE shall not be "
14955 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
14960 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
14961 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
14962 && CLASS_DATA (sym
)->attr
.coarray_comp
))
14963 || class_attr
.codimension
)
14964 && (sym
->attr
.result
|| sym
->result
== sym
))
14966 gfc_error ("Function result %qs at %L shall not be a coarray or have "
14967 "a coarray component", sym
->name
, &sym
->declared_at
);
14972 if (sym
->attr
.codimension
&& sym
->ts
.type
== BT_DERIVED
14973 && sym
->ts
.u
.derived
->ts
.is_iso_c
)
14975 gfc_error ("Variable %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
14976 "shall not be a coarray", sym
->name
, &sym
->declared_at
);
14981 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
14982 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
14983 && CLASS_DATA (sym
)->attr
.coarray_comp
))
14984 && (class_attr
.codimension
|| class_attr
.pointer
|| class_attr
.dimension
14985 || class_attr
.allocatable
))
14987 gfc_error ("Variable %qs at %L with coarray component shall be a "
14988 "nonpointer, nonallocatable scalar, which is not a coarray",
14989 sym
->name
, &sym
->declared_at
);
14993 /* F2008, C526. The function-result case was handled above. */
14994 if (class_attr
.codimension
14995 && !(class_attr
.allocatable
|| sym
->attr
.dummy
|| sym
->attr
.save
14996 || sym
->attr
.select_type_temporary
14997 || sym
->attr
.associate_var
14998 || (sym
->ns
->save_all
&& !sym
->attr
.automatic
)
14999 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15000 || sym
->ns
->proc_name
->attr
.is_main_program
15001 || sym
->attr
.function
|| sym
->attr
.result
|| sym
->attr
.use_assoc
))
15003 gfc_error ("Variable %qs at %L is a coarray and is not ALLOCATABLE, SAVE "
15004 "nor a dummy argument", sym
->name
, &sym
->declared_at
);
15008 else if (class_attr
.codimension
&& !sym
->attr
.select_type_temporary
15009 && !class_attr
.allocatable
&& as
&& as
->cotype
== AS_DEFERRED
)
15011 gfc_error ("Coarray variable %qs at %L shall not have codimensions with "
15012 "deferred shape", sym
->name
, &sym
->declared_at
);
15015 else if (class_attr
.codimension
&& class_attr
.allocatable
&& as
15016 && (as
->cotype
!= AS_DEFERRED
|| as
->type
!= AS_DEFERRED
))
15018 gfc_error ("Allocatable coarray variable %qs at %L must have "
15019 "deferred shape", sym
->name
, &sym
->declared_at
);
15024 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15025 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15026 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15027 || (class_attr
.codimension
&& class_attr
.allocatable
))
15028 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
)
15030 gfc_error ("Variable %qs at %L is INTENT(OUT) and can thus not be an "
15031 "allocatable coarray or have coarray components",
15032 sym
->name
, &sym
->declared_at
);
15036 if (class_attr
.codimension
&& sym
->attr
.dummy
15037 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.is_bind_c
)
15039 gfc_error ("Coarray dummy variable %qs at %L not allowed in BIND(C) "
15040 "procedure %qs", sym
->name
, &sym
->declared_at
,
15041 sym
->ns
->proc_name
->name
);
15045 if (sym
->ts
.type
== BT_LOGICAL
15046 && ((sym
->attr
.function
&& sym
->attr
.is_bind_c
&& sym
->result
== sym
)
15047 || ((sym
->attr
.dummy
|| sym
->attr
.result
) && sym
->ns
->proc_name
15048 && sym
->ns
->proc_name
->attr
.is_bind_c
)))
15051 for (i
= 0; gfc_logical_kinds
[i
].kind
; i
++)
15052 if (gfc_logical_kinds
[i
].kind
== sym
->ts
.kind
)
15054 if (!gfc_logical_kinds
[i
].c_bool
&& sym
->attr
.dummy
15055 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL dummy argument %qs at "
15056 "%L with non-C_Bool kind in BIND(C) procedure "
15057 "%qs", sym
->name
, &sym
->declared_at
,
15058 sym
->ns
->proc_name
->name
))
15060 else if (!gfc_logical_kinds
[i
].c_bool
15061 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL result variable "
15062 "%qs at %L with non-C_Bool kind in "
15063 "BIND(C) procedure %qs", sym
->name
,
15065 sym
->attr
.function
? sym
->name
15066 : sym
->ns
->proc_name
->name
))
15070 switch (sym
->attr
.flavor
)
15073 if (!resolve_fl_variable (sym
, mp_flag
))
15078 if (sym
->formal
&& !sym
->formal_ns
)
15080 /* Check that none of the arguments are a namelist. */
15081 gfc_formal_arglist
*formal
= sym
->formal
;
15083 for (; formal
; formal
= formal
->next
)
15084 if (formal
->sym
&& formal
->sym
->attr
.flavor
== FL_NAMELIST
)
15086 gfc_error ("Namelist %qs can not be an argument to "
15087 "subroutine or function at %L",
15088 formal
->sym
->name
, &sym
->declared_at
);
15093 if (!resolve_fl_procedure (sym
, mp_flag
))
15098 if (!resolve_fl_namelist (sym
))
15103 if (!resolve_fl_parameter (sym
))
15111 /* Resolve array specifier. Check as well some constraints
15112 on COMMON blocks. */
15114 check_constant
= sym
->attr
.in_common
&& !sym
->attr
.pointer
;
15116 /* Set the formal_arg_flag so that check_conflict will not throw
15117 an error for host associated variables in the specification
15118 expression for an array_valued function. */
15119 if (sym
->attr
.function
&& sym
->as
)
15120 formal_arg_flag
= true;
15122 saved_specification_expr
= specification_expr
;
15123 specification_expr
= true;
15124 gfc_resolve_array_spec (sym
->as
, check_constant
);
15125 specification_expr
= saved_specification_expr
;
15127 formal_arg_flag
= false;
15129 /* Resolve formal namespaces. */
15130 if (sym
->formal_ns
&& sym
->formal_ns
!= gfc_current_ns
15131 && !sym
->attr
.contained
&& !sym
->attr
.intrinsic
)
15132 gfc_resolve (sym
->formal_ns
);
15134 /* Make sure the formal namespace is present. */
15135 if (sym
->formal
&& !sym
->formal_ns
)
15137 gfc_formal_arglist
*formal
= sym
->formal
;
15138 while (formal
&& !formal
->sym
)
15139 formal
= formal
->next
;
15143 sym
->formal_ns
= formal
->sym
->ns
;
15144 if (sym
->ns
!= formal
->sym
->ns
)
15145 sym
->formal_ns
->refs
++;
15149 /* Check threadprivate restrictions. */
15150 if (sym
->attr
.threadprivate
&& !sym
->attr
.save
15151 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15152 && (!sym
->attr
.in_common
15153 && sym
->module
== NULL
15154 && (sym
->ns
->proc_name
== NULL
15155 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15156 gfc_error ("Threadprivate at %L isn't SAVEd", &sym
->declared_at
);
15158 /* Check omp declare target restrictions. */
15159 if (sym
->attr
.omp_declare_target
15160 && sym
->attr
.flavor
== FL_VARIABLE
15162 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15163 && (!sym
->attr
.in_common
15164 && sym
->module
== NULL
15165 && (sym
->ns
->proc_name
== NULL
15166 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15167 gfc_error ("!$OMP DECLARE TARGET variable %qs at %L isn't SAVEd",
15168 sym
->name
, &sym
->declared_at
);
15170 /* If we have come this far we can apply default-initializers, as
15171 described in 14.7.5, to those variables that have not already
15172 been assigned one. */
15173 if (sym
->ts
.type
== BT_DERIVED
15175 && !sym
->attr
.allocatable
15176 && !sym
->attr
.alloc_comp
)
15178 symbol_attribute
*a
= &sym
->attr
;
15180 if ((!a
->save
&& !a
->dummy
&& !a
->pointer
15181 && !a
->in_common
&& !a
->use_assoc
15183 && !((a
->function
|| a
->result
)
15185 || sym
->ts
.u
.derived
->attr
.alloc_comp
15186 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15187 && !(a
->function
&& sym
!= sym
->result
))
15188 || (a
->dummy
&& a
->intent
== INTENT_OUT
&& !a
->pointer
))
15189 apply_default_init (sym
);
15190 else if (a
->function
&& sym
->result
&& a
->access
!= ACCESS_PRIVATE
15191 && (sym
->ts
.u
.derived
->attr
.alloc_comp
15192 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15193 /* Mark the result symbol to be referenced, when it has allocatable
15195 sym
->result
->attr
.referenced
= 1;
15198 if (sym
->ts
.type
== BT_CLASS
&& sym
->ns
== gfc_current_ns
15199 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
15200 && !CLASS_DATA (sym
)->attr
.class_pointer
15201 && !CLASS_DATA (sym
)->attr
.allocatable
)
15202 apply_default_init (sym
);
15204 /* If this symbol has a type-spec, check it. */
15205 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
15206 || (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
))
15207 if (!resolve_typespec_used (&sym
->ts
, &sym
->declared_at
, sym
->name
))
15210 if (sym
->param_list
)
15215 /************* Resolve DATA statements *************/
15219 gfc_data_value
*vnode
;
15225 /* Advance the values structure to point to the next value in the data list. */
15228 next_data_value (void)
15230 while (mpz_cmp_ui (values
.left
, 0) == 0)
15233 if (values
.vnode
->next
== NULL
)
15236 values
.vnode
= values
.vnode
->next
;
15237 mpz_set (values
.left
, values
.vnode
->repeat
);
15245 check_data_variable (gfc_data_variable
*var
, locus
*where
)
15251 ar_type mark
= AR_UNKNOWN
;
15253 mpz_t section_index
[GFC_MAX_DIMENSIONS
];
15259 if (!gfc_resolve_expr (var
->expr
))
15263 mpz_init_set_si (offset
, 0);
15266 if (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
15267 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
15268 e
= e
->value
.function
.actual
->expr
;
15270 if (e
->expr_type
!= EXPR_VARIABLE
)
15271 gfc_internal_error ("check_data_variable(): Bad expression");
15273 sym
= e
->symtree
->n
.sym
;
15275 if (sym
->ns
->is_block_data
&& !sym
->attr
.in_common
)
15277 gfc_error ("BLOCK DATA element %qs at %L must be in COMMON",
15278 sym
->name
, &sym
->declared_at
);
15281 if (e
->ref
== NULL
&& sym
->as
)
15283 gfc_error ("DATA array %qs at %L must be specified in a previous"
15284 " declaration", sym
->name
, where
);
15288 has_pointer
= sym
->attr
.pointer
;
15290 if (gfc_is_coindexed (e
))
15292 gfc_error ("DATA element %qs at %L cannot have a coindex", sym
->name
,
15297 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15299 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.pointer
)
15303 && ref
->type
== REF_ARRAY
15304 && ref
->u
.ar
.type
!= AR_FULL
)
15306 gfc_error ("DATA element %qs at %L is a pointer and so must "
15307 "be a full array", sym
->name
, where
);
15312 if (e
->rank
== 0 || has_pointer
)
15314 mpz_init_set_ui (size
, 1);
15321 /* Find the array section reference. */
15322 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15324 if (ref
->type
!= REF_ARRAY
)
15326 if (ref
->u
.ar
.type
== AR_ELEMENT
)
15332 /* Set marks according to the reference pattern. */
15333 switch (ref
->u
.ar
.type
)
15341 /* Get the start position of array section. */
15342 gfc_get_section_index (ar
, section_index
, &offset
);
15347 gcc_unreachable ();
15350 if (!gfc_array_size (e
, &size
))
15352 gfc_error ("Nonconstant array section at %L in DATA statement",
15354 mpz_clear (offset
);
15361 while (mpz_cmp_ui (size
, 0) > 0)
15363 if (!next_data_value ())
15365 gfc_error ("DATA statement at %L has more variables than values",
15371 t
= gfc_check_assign (var
->expr
, values
.vnode
->expr
, 0);
15375 /* If we have more than one element left in the repeat count,
15376 and we have more than one element left in the target variable,
15377 then create a range assignment. */
15378 /* FIXME: Only done for full arrays for now, since array sections
15380 if (mark
== AR_FULL
&& ref
&& ref
->next
== NULL
15381 && mpz_cmp_ui (values
.left
, 1) > 0 && mpz_cmp_ui (size
, 1) > 0)
15385 if (mpz_cmp (size
, values
.left
) >= 0)
15387 mpz_init_set (range
, values
.left
);
15388 mpz_sub (size
, size
, values
.left
);
15389 mpz_set_ui (values
.left
, 0);
15393 mpz_init_set (range
, size
);
15394 mpz_sub (values
.left
, values
.left
, size
);
15395 mpz_set_ui (size
, 0);
15398 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15401 mpz_add (offset
, offset
, range
);
15408 /* Assign initial value to symbol. */
15411 mpz_sub_ui (values
.left
, values
.left
, 1);
15412 mpz_sub_ui (size
, size
, 1);
15414 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15419 if (mark
== AR_FULL
)
15420 mpz_add_ui (offset
, offset
, 1);
15422 /* Modify the array section indexes and recalculate the offset
15423 for next element. */
15424 else if (mark
== AR_SECTION
)
15425 gfc_advance_section (section_index
, ar
, &offset
);
15429 if (mark
== AR_SECTION
)
15431 for (i
= 0; i
< ar
->dimen
; i
++)
15432 mpz_clear (section_index
[i
]);
15436 mpz_clear (offset
);
15442 static bool traverse_data_var (gfc_data_variable
*, locus
*);
15444 /* Iterate over a list of elements in a DATA statement. */
15447 traverse_data_list (gfc_data_variable
*var
, locus
*where
)
15450 iterator_stack frame
;
15451 gfc_expr
*e
, *start
, *end
, *step
;
15452 bool retval
= true;
15454 mpz_init (frame
.value
);
15457 start
= gfc_copy_expr (var
->iter
.start
);
15458 end
= gfc_copy_expr (var
->iter
.end
);
15459 step
= gfc_copy_expr (var
->iter
.step
);
15461 if (!gfc_simplify_expr (start
, 1)
15462 || start
->expr_type
!= EXPR_CONSTANT
)
15464 gfc_error ("start of implied-do loop at %L could not be "
15465 "simplified to a constant value", &start
->where
);
15469 if (!gfc_simplify_expr (end
, 1)
15470 || end
->expr_type
!= EXPR_CONSTANT
)
15472 gfc_error ("end of implied-do loop at %L could not be "
15473 "simplified to a constant value", &start
->where
);
15477 if (!gfc_simplify_expr (step
, 1)
15478 || step
->expr_type
!= EXPR_CONSTANT
)
15480 gfc_error ("step of implied-do loop at %L could not be "
15481 "simplified to a constant value", &start
->where
);
15486 mpz_set (trip
, end
->value
.integer
);
15487 mpz_sub (trip
, trip
, start
->value
.integer
);
15488 mpz_add (trip
, trip
, step
->value
.integer
);
15490 mpz_div (trip
, trip
, step
->value
.integer
);
15492 mpz_set (frame
.value
, start
->value
.integer
);
15494 frame
.prev
= iter_stack
;
15495 frame
.variable
= var
->iter
.var
->symtree
;
15496 iter_stack
= &frame
;
15498 while (mpz_cmp_ui (trip
, 0) > 0)
15500 if (!traverse_data_var (var
->list
, where
))
15506 e
= gfc_copy_expr (var
->expr
);
15507 if (!gfc_simplify_expr (e
, 1))
15514 mpz_add (frame
.value
, frame
.value
, step
->value
.integer
);
15516 mpz_sub_ui (trip
, trip
, 1);
15520 mpz_clear (frame
.value
);
15523 gfc_free_expr (start
);
15524 gfc_free_expr (end
);
15525 gfc_free_expr (step
);
15527 iter_stack
= frame
.prev
;
15532 /* Type resolve variables in the variable list of a DATA statement. */
15535 traverse_data_var (gfc_data_variable
*var
, locus
*where
)
15539 for (; var
; var
= var
->next
)
15541 if (var
->expr
== NULL
)
15542 t
= traverse_data_list (var
, where
);
15544 t
= check_data_variable (var
, where
);
15554 /* Resolve the expressions and iterators associated with a data statement.
15555 This is separate from the assignment checking because data lists should
15556 only be resolved once. */
15559 resolve_data_variables (gfc_data_variable
*d
)
15561 for (; d
; d
= d
->next
)
15563 if (d
->list
== NULL
)
15565 if (!gfc_resolve_expr (d
->expr
))
15570 if (!gfc_resolve_iterator (&d
->iter
, false, true))
15573 if (!resolve_data_variables (d
->list
))
15582 /* Resolve a single DATA statement. We implement this by storing a pointer to
15583 the value list into static variables, and then recursively traversing the
15584 variables list, expanding iterators and such. */
15587 resolve_data (gfc_data
*d
)
15590 if (!resolve_data_variables (d
->var
))
15593 values
.vnode
= d
->value
;
15594 if (d
->value
== NULL
)
15595 mpz_set_ui (values
.left
, 0);
15597 mpz_set (values
.left
, d
->value
->repeat
);
15599 if (!traverse_data_var (d
->var
, &d
->where
))
15602 /* At this point, we better not have any values left. */
15604 if (next_data_value ())
15605 gfc_error ("DATA statement at %L has more values than variables",
15610 /* 12.6 Constraint: In a pure subprogram any variable which is in common or
15611 accessed by host or use association, is a dummy argument to a pure function,
15612 is a dummy argument with INTENT (IN) to a pure subroutine, or an object that
15613 is storage associated with any such variable, shall not be used in the
15614 following contexts: (clients of this function). */
15616 /* Determines if a variable is not 'pure', i.e., not assignable within a pure
15617 procedure. Returns zero if assignment is OK, nonzero if there is a
15620 gfc_impure_variable (gfc_symbol
*sym
)
15625 if (sym
->attr
.use_assoc
|| sym
->attr
.in_common
)
15628 /* Check if the symbol's ns is inside the pure procedure. */
15629 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15633 if (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.function
)
15637 proc
= sym
->ns
->proc_name
;
15638 if (sym
->attr
.dummy
15639 && ((proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_IN
)
15640 || proc
->attr
.function
))
15643 /* TODO: Sort out what can be storage associated, if anything, and include
15644 it here. In principle equivalences should be scanned but it does not
15645 seem to be possible to storage associate an impure variable this way. */
15650 /* Test whether a symbol is pure or not. For a NULL pointer, checks if the
15651 current namespace is inside a pure procedure. */
15654 gfc_pure (gfc_symbol
*sym
)
15656 symbol_attribute attr
;
15661 /* Check if the current namespace or one of its parents
15662 belongs to a pure procedure. */
15663 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15665 sym
= ns
->proc_name
;
15669 if (attr
.flavor
== FL_PROCEDURE
&& attr
.pure
)
15677 return attr
.flavor
== FL_PROCEDURE
&& attr
.pure
;
15681 /* Test whether a symbol is implicitly pure or not. For a NULL pointer,
15682 checks if the current namespace is implicitly pure. Note that this
15683 function returns false for a PURE procedure. */
15686 gfc_implicit_pure (gfc_symbol
*sym
)
15692 /* Check if the current procedure is implicit_pure. Walk up
15693 the procedure list until we find a procedure. */
15694 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15696 sym
= ns
->proc_name
;
15700 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15705 return sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.implicit_pure
15706 && !sym
->attr
.pure
;
15711 gfc_unset_implicit_pure (gfc_symbol
*sym
)
15717 /* Check if the current procedure is implicit_pure. Walk up
15718 the procedure list until we find a procedure. */
15719 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15721 sym
= ns
->proc_name
;
15725 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15730 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15731 sym
->attr
.implicit_pure
= 0;
15733 sym
->attr
.pure
= 0;
15737 /* Test whether the current procedure is elemental or not. */
15740 gfc_elemental (gfc_symbol
*sym
)
15742 symbol_attribute attr
;
15745 sym
= gfc_current_ns
->proc_name
;
15750 return attr
.flavor
== FL_PROCEDURE
&& attr
.elemental
;
15754 /* Warn about unused labels. */
15757 warn_unused_fortran_label (gfc_st_label
*label
)
15762 warn_unused_fortran_label (label
->left
);
15764 if (label
->defined
== ST_LABEL_UNKNOWN
)
15767 switch (label
->referenced
)
15769 case ST_LABEL_UNKNOWN
:
15770 gfc_warning (OPT_Wunused_label
, "Label %d at %L defined but not used",
15771 label
->value
, &label
->where
);
15774 case ST_LABEL_BAD_TARGET
:
15775 gfc_warning (OPT_Wunused_label
,
15776 "Label %d at %L defined but cannot be used",
15777 label
->value
, &label
->where
);
15784 warn_unused_fortran_label (label
->right
);
15788 /* Returns the sequence type of a symbol or sequence. */
15791 sequence_type (gfc_typespec ts
)
15800 if (ts
.u
.derived
->components
== NULL
)
15801 return SEQ_NONDEFAULT
;
15803 result
= sequence_type (ts
.u
.derived
->components
->ts
);
15804 for (c
= ts
.u
.derived
->components
->next
; c
; c
= c
->next
)
15805 if (sequence_type (c
->ts
) != result
)
15811 if (ts
.kind
!= gfc_default_character_kind
)
15812 return SEQ_NONDEFAULT
;
15814 return SEQ_CHARACTER
;
15817 if (ts
.kind
!= gfc_default_integer_kind
)
15818 return SEQ_NONDEFAULT
;
15820 return SEQ_NUMERIC
;
15823 if (!(ts
.kind
== gfc_default_real_kind
15824 || ts
.kind
== gfc_default_double_kind
))
15825 return SEQ_NONDEFAULT
;
15827 return SEQ_NUMERIC
;
15830 if (ts
.kind
!= gfc_default_complex_kind
)
15831 return SEQ_NONDEFAULT
;
15833 return SEQ_NUMERIC
;
15836 if (ts
.kind
!= gfc_default_logical_kind
)
15837 return SEQ_NONDEFAULT
;
15839 return SEQ_NUMERIC
;
15842 return SEQ_NONDEFAULT
;
15847 /* Resolve derived type EQUIVALENCE object. */
15850 resolve_equivalence_derived (gfc_symbol
*derived
, gfc_symbol
*sym
, gfc_expr
*e
)
15852 gfc_component
*c
= derived
->components
;
15857 /* Shall not be an object of nonsequence derived type. */
15858 if (!derived
->attr
.sequence
)
15860 gfc_error ("Derived type variable %qs at %L must have SEQUENCE "
15861 "attribute to be an EQUIVALENCE object", sym
->name
,
15866 /* Shall not have allocatable components. */
15867 if (derived
->attr
.alloc_comp
)
15869 gfc_error ("Derived type variable %qs at %L cannot have ALLOCATABLE "
15870 "components to be an EQUIVALENCE object",sym
->name
,
15875 if (sym
->attr
.in_common
&& gfc_has_default_initializer (sym
->ts
.u
.derived
))
15877 gfc_error ("Derived type variable %qs at %L with default "
15878 "initialization cannot be in EQUIVALENCE with a variable "
15879 "in COMMON", sym
->name
, &e
->where
);
15883 for (; c
; c
= c
->next
)
15885 if (gfc_bt_struct (c
->ts
.type
)
15886 && (!resolve_equivalence_derived(c
->ts
.u
.derived
, sym
, e
)))
15889 /* Shall not be an object of sequence derived type containing a pointer
15890 in the structure. */
15891 if (c
->attr
.pointer
)
15893 gfc_error ("Derived type variable %qs at %L with pointer "
15894 "component(s) cannot be an EQUIVALENCE object",
15895 sym
->name
, &e
->where
);
15903 /* Resolve equivalence object.
15904 An EQUIVALENCE object shall not be a dummy argument, a pointer, a target,
15905 an allocatable array, an object of nonsequence derived type, an object of
15906 sequence derived type containing a pointer at any level of component
15907 selection, an automatic object, a function name, an entry name, a result
15908 name, a named constant, a structure component, or a subobject of any of
15909 the preceding objects. A substring shall not have length zero. A
15910 derived type shall not have components with default initialization nor
15911 shall two objects of an equivalence group be initialized.
15912 Either all or none of the objects shall have an protected attribute.
15913 The simple constraints are done in symbol.c(check_conflict) and the rest
15914 are implemented here. */
15917 resolve_equivalence (gfc_equiv
*eq
)
15920 gfc_symbol
*first_sym
;
15923 locus
*last_where
= NULL
;
15924 seq_type eq_type
, last_eq_type
;
15925 gfc_typespec
*last_ts
;
15926 int object
, cnt_protected
;
15929 last_ts
= &eq
->expr
->symtree
->n
.sym
->ts
;
15931 first_sym
= eq
->expr
->symtree
->n
.sym
;
15935 for (object
= 1; eq
; eq
= eq
->eq
, object
++)
15939 e
->ts
= e
->symtree
->n
.sym
->ts
;
15940 /* match_varspec might not know yet if it is seeing
15941 array reference or substring reference, as it doesn't
15943 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
)
15945 gfc_ref
*ref
= e
->ref
;
15946 sym
= e
->symtree
->n
.sym
;
15948 if (sym
->attr
.dimension
)
15950 ref
->u
.ar
.as
= sym
->as
;
15954 /* For substrings, convert REF_ARRAY into REF_SUBSTRING. */
15955 if (e
->ts
.type
== BT_CHARACTER
15957 && ref
->type
== REF_ARRAY
15958 && ref
->u
.ar
.dimen
== 1
15959 && ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
15960 && ref
->u
.ar
.stride
[0] == NULL
)
15962 gfc_expr
*start
= ref
->u
.ar
.start
[0];
15963 gfc_expr
*end
= ref
->u
.ar
.end
[0];
15966 /* Optimize away the (:) reference. */
15967 if (start
== NULL
&& end
== NULL
)
15970 e
->ref
= ref
->next
;
15972 e
->ref
->next
= ref
->next
;
15977 ref
->type
= REF_SUBSTRING
;
15979 start
= gfc_get_int_expr (gfc_charlen_int_kind
,
15981 ref
->u
.ss
.start
= start
;
15982 if (end
== NULL
&& e
->ts
.u
.cl
)
15983 end
= gfc_copy_expr (e
->ts
.u
.cl
->length
);
15984 ref
->u
.ss
.end
= end
;
15985 ref
->u
.ss
.length
= e
->ts
.u
.cl
;
15992 /* Any further ref is an error. */
15995 gcc_assert (ref
->type
== REF_ARRAY
);
15996 gfc_error ("Syntax error in EQUIVALENCE statement at %L",
16002 if (!gfc_resolve_expr (e
))
16005 sym
= e
->symtree
->n
.sym
;
16007 if (sym
->attr
.is_protected
)
16009 if (cnt_protected
> 0 && cnt_protected
!= object
)
16011 gfc_error ("Either all or none of the objects in the "
16012 "EQUIVALENCE set at %L shall have the "
16013 "PROTECTED attribute",
16018 /* Shall not equivalence common block variables in a PURE procedure. */
16019 if (sym
->ns
->proc_name
16020 && sym
->ns
->proc_name
->attr
.pure
16021 && sym
->attr
.in_common
)
16023 /* Need to check for symbols that may have entered the pure
16024 procedure via a USE statement. */
16025 bool saw_sym
= false;
16026 if (sym
->ns
->use_stmts
)
16029 for (r
= sym
->ns
->use_stmts
->rename
; r
; r
= r
->next
)
16030 if (strcmp(r
->use_name
, sym
->name
) == 0) saw_sym
= true;
16036 gfc_error ("COMMON block member %qs at %L cannot be an "
16037 "EQUIVALENCE object in the pure procedure %qs",
16038 sym
->name
, &e
->where
, sym
->ns
->proc_name
->name
);
16042 /* Shall not be a named constant. */
16043 if (e
->expr_type
== EXPR_CONSTANT
)
16045 gfc_error ("Named constant %qs at %L cannot be an EQUIVALENCE "
16046 "object", sym
->name
, &e
->where
);
16050 if (e
->ts
.type
== BT_DERIVED
16051 && !resolve_equivalence_derived (e
->ts
.u
.derived
, sym
, e
))
16054 /* Check that the types correspond correctly:
16056 A numeric sequence structure may be equivalenced to another sequence
16057 structure, an object of default integer type, default real type, double
16058 precision real type, default logical type such that components of the
16059 structure ultimately only become associated to objects of the same
16060 kind. A character sequence structure may be equivalenced to an object
16061 of default character kind or another character sequence structure.
16062 Other objects may be equivalenced only to objects of the same type and
16063 kind parameters. */
16065 /* Identical types are unconditionally OK. */
16066 if (object
== 1 || gfc_compare_types (last_ts
, &sym
->ts
))
16067 goto identical_types
;
16069 last_eq_type
= sequence_type (*last_ts
);
16070 eq_type
= sequence_type (sym
->ts
);
16072 /* Since the pair of objects is not of the same type, mixed or
16073 non-default sequences can be rejected. */
16075 msg
= "Sequence %s with mixed components in EQUIVALENCE "
16076 "statement at %L with different type objects";
16078 && last_eq_type
== SEQ_MIXED
16079 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16080 || (eq_type
== SEQ_MIXED
16081 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16084 msg
= "Non-default type object or sequence %s in EQUIVALENCE "
16085 "statement at %L with objects of different type";
16087 && last_eq_type
== SEQ_NONDEFAULT
16088 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16089 || (eq_type
== SEQ_NONDEFAULT
16090 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16093 msg
="Non-CHARACTER object %qs in default CHARACTER "
16094 "EQUIVALENCE statement at %L";
16095 if (last_eq_type
== SEQ_CHARACTER
16096 && eq_type
!= SEQ_CHARACTER
16097 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16100 msg
="Non-NUMERIC object %qs in default NUMERIC "
16101 "EQUIVALENCE statement at %L";
16102 if (last_eq_type
== SEQ_NUMERIC
16103 && eq_type
!= SEQ_NUMERIC
16104 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16109 last_where
= &e
->where
;
16114 /* Shall not be an automatic array. */
16115 if (e
->ref
->type
== REF_ARRAY
16116 && !gfc_resolve_array_spec (e
->ref
->u
.ar
.as
, 1))
16118 gfc_error ("Array %qs at %L with non-constant bounds cannot be "
16119 "an EQUIVALENCE object", sym
->name
, &e
->where
);
16126 /* Shall not be a structure component. */
16127 if (r
->type
== REF_COMPONENT
)
16129 gfc_error ("Structure component %qs at %L cannot be an "
16130 "EQUIVALENCE object",
16131 r
->u
.c
.component
->name
, &e
->where
);
16135 /* A substring shall not have length zero. */
16136 if (r
->type
== REF_SUBSTRING
)
16138 if (compare_bound (r
->u
.ss
.start
, r
->u
.ss
.end
) == CMP_GT
)
16140 gfc_error ("Substring at %L has length zero",
16141 &r
->u
.ss
.start
->where
);
16151 /* Function called by resolve_fntype to flag other symbol used in the
16152 length type parameter specification of function resuls. */
16155 flag_fn_result_spec (gfc_expr
*expr
,
16156 gfc_symbol
*sym ATTRIBUTE_UNUSED
,
16157 int *f ATTRIBUTE_UNUSED
)
16162 if (expr
->expr_type
== EXPR_VARIABLE
)
16164 s
= expr
->symtree
->n
.sym
;
16165 for (ns
= s
->ns
; ns
; ns
= ns
->parent
)
16169 if (!s
->fn_result_spec
16170 && s
->attr
.flavor
== FL_PARAMETER
)
16172 /* Function contained in a module.... */
16173 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_MODULE
)
16176 s
->fn_result_spec
= 1;
16177 /* Make sure that this symbol is translated as a module
16179 st
= gfc_get_unique_symtree (ns
);
16183 /* ... which is use associated and called. */
16184 else if (s
->attr
.use_assoc
|| s
->attr
.used_in_submodule
16186 /* External function matched with an interface. */
16189 && s
->ns
->proc_name
->attr
.if_source
== IFSRC_DECL
)
16190 || s
->ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16191 && s
->ns
->proc_name
->attr
.function
))
16192 s
->fn_result_spec
= 1;
16199 /* Resolve function and ENTRY types, issue diagnostics if needed. */
16202 resolve_fntype (gfc_namespace
*ns
)
16204 gfc_entry_list
*el
;
16207 if (ns
->proc_name
== NULL
|| !ns
->proc_name
->attr
.function
)
16210 /* If there are any entries, ns->proc_name is the entry master
16211 synthetic symbol and ns->entries->sym actual FUNCTION symbol. */
16213 sym
= ns
->entries
->sym
;
16215 sym
= ns
->proc_name
;
16216 if (sym
->result
== sym
16217 && sym
->ts
.type
== BT_UNKNOWN
16218 && !gfc_set_default_type (sym
, 0, NULL
)
16219 && !sym
->attr
.untyped
)
16221 gfc_error ("Function %qs at %L has no IMPLICIT type",
16222 sym
->name
, &sym
->declared_at
);
16223 sym
->attr
.untyped
= 1;
16226 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->ts
.u
.derived
->attr
.use_assoc
16227 && !sym
->attr
.contained
16228 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
16229 && gfc_check_symbol_access (sym
))
16231 gfc_notify_std (GFC_STD_F2003
, "PUBLIC function %qs at "
16232 "%L of PRIVATE type %qs", sym
->name
,
16233 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
16237 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
16239 if (el
->sym
->result
== el
->sym
16240 && el
->sym
->ts
.type
== BT_UNKNOWN
16241 && !gfc_set_default_type (el
->sym
, 0, NULL
)
16242 && !el
->sym
->attr
.untyped
)
16244 gfc_error ("ENTRY %qs at %L has no IMPLICIT type",
16245 el
->sym
->name
, &el
->sym
->declared_at
);
16246 el
->sym
->attr
.untyped
= 1;
16250 if (sym
->ts
.type
== BT_CHARACTER
)
16251 gfc_traverse_expr (sym
->ts
.u
.cl
->length
, NULL
, flag_fn_result_spec
, 0);
16255 /* 12.3.2.1.1 Defined operators. */
16258 check_uop_procedure (gfc_symbol
*sym
, locus where
)
16260 gfc_formal_arglist
*formal
;
16262 if (!sym
->attr
.function
)
16264 gfc_error ("User operator procedure %qs at %L must be a FUNCTION",
16265 sym
->name
, &where
);
16269 if (sym
->ts
.type
== BT_CHARACTER
16270 && !((sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
) || sym
->ts
.deferred
)
16271 && !(sym
->result
&& ((sym
->result
->ts
.u
.cl
16272 && sym
->result
->ts
.u
.cl
->length
) || sym
->result
->ts
.deferred
)))
16274 gfc_error ("User operator procedure %qs at %L cannot be assumed "
16275 "character length", sym
->name
, &where
);
16279 formal
= gfc_sym_get_dummy_args (sym
);
16280 if (!formal
|| !formal
->sym
)
16282 gfc_error ("User operator procedure %qs at %L must have at least "
16283 "one argument", sym
->name
, &where
);
16287 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16289 gfc_error ("First argument of operator interface at %L must be "
16290 "INTENT(IN)", &where
);
16294 if (formal
->sym
->attr
.optional
)
16296 gfc_error ("First argument of operator interface at %L cannot be "
16297 "optional", &where
);
16301 formal
= formal
->next
;
16302 if (!formal
|| !formal
->sym
)
16305 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16307 gfc_error ("Second argument of operator interface at %L must be "
16308 "INTENT(IN)", &where
);
16312 if (formal
->sym
->attr
.optional
)
16314 gfc_error ("Second argument of operator interface at %L cannot be "
16315 "optional", &where
);
16321 gfc_error ("Operator interface at %L must have, at most, two "
16322 "arguments", &where
);
16330 gfc_resolve_uops (gfc_symtree
*symtree
)
16332 gfc_interface
*itr
;
16334 if (symtree
== NULL
)
16337 gfc_resolve_uops (symtree
->left
);
16338 gfc_resolve_uops (symtree
->right
);
16340 for (itr
= symtree
->n
.uop
->op
; itr
; itr
= itr
->next
)
16341 check_uop_procedure (itr
->sym
, itr
->sym
->declared_at
);
16345 /* Examine all of the expressions associated with a program unit,
16346 assign types to all intermediate expressions, make sure that all
16347 assignments are to compatible types and figure out which names
16348 refer to which functions or subroutines. It doesn't check code
16349 block, which is handled by gfc_resolve_code. */
16352 resolve_types (gfc_namespace
*ns
)
16358 gfc_namespace
* old_ns
= gfc_current_ns
;
16360 if (ns
->types_resolved
)
16363 /* Check that all IMPLICIT types are ok. */
16364 if (!ns
->seen_implicit_none
)
16367 for (letter
= 0; letter
!= GFC_LETTERS
; ++letter
)
16368 if (ns
->set_flag
[letter
]
16369 && !resolve_typespec_used (&ns
->default_type
[letter
],
16370 &ns
->implicit_loc
[letter
], NULL
))
16374 gfc_current_ns
= ns
;
16376 resolve_entries (ns
);
16378 resolve_common_vars (&ns
->blank_common
, false);
16379 resolve_common_blocks (ns
->common_root
);
16381 resolve_contained_functions (ns
);
16383 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
16384 && ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16385 resolve_formal_arglist (ns
->proc_name
);
16387 gfc_traverse_ns (ns
, resolve_bind_c_derived_types
);
16389 for (cl
= ns
->cl_list
; cl
; cl
= cl
->next
)
16390 resolve_charlen (cl
);
16392 gfc_traverse_ns (ns
, resolve_symbol
);
16394 resolve_fntype (ns
);
16396 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16398 if (gfc_pure (ns
->proc_name
) && !gfc_pure (n
->proc_name
))
16399 gfc_error ("Contained procedure %qs at %L of a PURE procedure must "
16400 "also be PURE", n
->proc_name
->name
,
16401 &n
->proc_name
->declared_at
);
16407 gfc_do_concurrent_flag
= 0;
16408 gfc_check_interfaces (ns
);
16410 gfc_traverse_ns (ns
, resolve_values
);
16416 for (d
= ns
->data
; d
; d
= d
->next
)
16420 gfc_traverse_ns (ns
, gfc_formalize_init_value
);
16422 gfc_traverse_ns (ns
, gfc_verify_binding_labels
);
16424 for (eq
= ns
->equiv
; eq
; eq
= eq
->next
)
16425 resolve_equivalence (eq
);
16427 /* Warn about unused labels. */
16428 if (warn_unused_label
)
16429 warn_unused_fortran_label (ns
->st_labels
);
16431 gfc_resolve_uops (ns
->uop_root
);
16433 gfc_traverse_ns (ns
, gfc_verify_DTIO_procedures
);
16435 gfc_resolve_omp_declare_simd (ns
);
16437 gfc_resolve_omp_udrs (ns
->omp_udr_root
);
16439 ns
->types_resolved
= 1;
16441 gfc_current_ns
= old_ns
;
16445 /* Call gfc_resolve_code recursively. */
16448 resolve_codes (gfc_namespace
*ns
)
16451 bitmap_obstack old_obstack
;
16453 if (ns
->resolved
== 1)
16456 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16459 gfc_current_ns
= ns
;
16461 /* Don't clear 'cs_base' if this is the namespace of a BLOCK construct. */
16462 if (!(ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_LABEL
))
16465 /* Set to an out of range value. */
16466 current_entry_id
= -1;
16468 old_obstack
= labels_obstack
;
16469 bitmap_obstack_initialize (&labels_obstack
);
16471 gfc_resolve_oacc_declare (ns
);
16472 gfc_resolve_omp_local_vars (ns
);
16473 gfc_resolve_code (ns
->code
, ns
);
16475 bitmap_obstack_release (&labels_obstack
);
16476 labels_obstack
= old_obstack
;
16480 /* This function is called after a complete program unit has been compiled.
16481 Its purpose is to examine all of the expressions associated with a program
16482 unit, assign types to all intermediate expressions, make sure that all
16483 assignments are to compatible types and figure out which names refer to
16484 which functions or subroutines. */
16487 gfc_resolve (gfc_namespace
*ns
)
16489 gfc_namespace
*old_ns
;
16490 code_stack
*old_cs_base
;
16491 struct gfc_omp_saved_state old_omp_state
;
16497 old_ns
= gfc_current_ns
;
16498 old_cs_base
= cs_base
;
16500 /* As gfc_resolve can be called during resolution of an OpenMP construct
16501 body, we should clear any state associated to it, so that say NS's
16502 DO loops are not interpreted as OpenMP loops. */
16503 if (!ns
->construct_entities
)
16504 gfc_omp_save_and_clear_state (&old_omp_state
);
16506 resolve_types (ns
);
16507 component_assignment_level
= 0;
16508 resolve_codes (ns
);
16510 gfc_current_ns
= old_ns
;
16511 cs_base
= old_cs_base
;
16514 gfc_run_passes (ns
);
16516 if (!ns
->construct_entities
)
16517 gfc_omp_restore_state (&old_omp_state
);