1 /* Perform type resolution on the various structures.
2 Copyright (C) 2001-2018 Free Software Foundation, Inc.
3 Contributed by Andy Vaught
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
23 #include "coretypes.h"
27 #include "arith.h" /* For gfc_compare_expr(). */
28 #include "dependency.h"
30 #include "target-memory.h" /* for gfc_simplify_transfer */
31 #include "constructor.h"
33 /* Types used in equivalence statements. */
37 SEQ_NONDEFAULT
, SEQ_NUMERIC
, SEQ_CHARACTER
, SEQ_MIXED
40 /* Stack to keep track of the nesting of blocks as we move through the
41 code. See resolve_branch() and gfc_resolve_code(). */
43 typedef struct code_stack
45 struct gfc_code
*head
, *current
;
46 struct code_stack
*prev
;
48 /* This bitmap keeps track of the targets valid for a branch from
49 inside this block except for END {IF|SELECT}s of enclosing
51 bitmap reachable_labels
;
55 static code_stack
*cs_base
= NULL
;
58 /* Nonzero if we're inside a FORALL or DO CONCURRENT block. */
60 static int forall_flag
;
61 int gfc_do_concurrent_flag
;
63 /* True when we are resolving an expression that is an actual argument to
65 static bool actual_arg
= false;
66 /* True when we are resolving an expression that is the first actual argument
68 static bool first_actual_arg
= false;
71 /* Nonzero if we're inside a OpenMP WORKSHARE or PARALLEL WORKSHARE block. */
73 static int omp_workshare_flag
;
75 /* True if we are processing a formal arglist. The corresponding function
76 resets the flag each time that it is read. */
77 static bool formal_arg_flag
= false;
79 /* True if we are resolving a specification expression. */
80 static bool specification_expr
= false;
82 /* The id of the last entry seen. */
83 static int current_entry_id
;
85 /* We use bitmaps to determine if a branch target is valid. */
86 static bitmap_obstack labels_obstack
;
88 /* True when simplifying a EXPR_VARIABLE argument to an inquiry function. */
89 static bool inquiry_argument
= false;
93 gfc_is_formal_arg (void)
95 return formal_arg_flag
;
98 /* Is the symbol host associated? */
100 is_sym_host_assoc (gfc_symbol
*sym
, gfc_namespace
*ns
)
102 for (ns
= ns
->parent
; ns
; ns
= ns
->parent
)
111 /* Ensure a typespec used is valid; for instance, TYPE(t) is invalid if t is
112 an ABSTRACT derived-type. If where is not NULL, an error message with that
113 locus is printed, optionally using name. */
116 resolve_typespec_used (gfc_typespec
* ts
, locus
* where
, const char* name
)
118 if (ts
->type
== BT_DERIVED
&& ts
->u
.derived
->attr
.abstract
)
123 gfc_error ("%qs at %L is of the ABSTRACT type %qs",
124 name
, where
, ts
->u
.derived
->name
);
126 gfc_error ("ABSTRACT type %qs used at %L",
127 ts
->u
.derived
->name
, where
);
138 check_proc_interface (gfc_symbol
*ifc
, locus
*where
)
140 /* Several checks for F08:C1216. */
141 if (ifc
->attr
.procedure
)
143 gfc_error ("Interface %qs at %L is declared "
144 "in a later PROCEDURE statement", ifc
->name
, where
);
149 /* For generic interfaces, check if there is
150 a specific procedure with the same name. */
151 gfc_interface
*gen
= ifc
->generic
;
152 while (gen
&& strcmp (gen
->sym
->name
, ifc
->name
) != 0)
156 gfc_error ("Interface %qs at %L may not be generic",
161 if (ifc
->attr
.proc
== PROC_ST_FUNCTION
)
163 gfc_error ("Interface %qs at %L may not be a statement function",
167 if (gfc_is_intrinsic (ifc
, 0, ifc
->declared_at
)
168 || gfc_is_intrinsic (ifc
, 1, ifc
->declared_at
))
169 ifc
->attr
.intrinsic
= 1;
170 if (ifc
->attr
.intrinsic
&& !gfc_intrinsic_actual_ok (ifc
->name
, 0))
172 gfc_error ("Intrinsic procedure %qs not allowed in "
173 "PROCEDURE statement at %L", ifc
->name
, where
);
176 if (!ifc
->attr
.if_source
&& !ifc
->attr
.intrinsic
&& ifc
->name
[0] != '\0')
178 gfc_error ("Interface %qs at %L must be explicit", ifc
->name
, where
);
185 static void resolve_symbol (gfc_symbol
*sym
);
188 /* Resolve the interface for a PROCEDURE declaration or procedure pointer. */
191 resolve_procedure_interface (gfc_symbol
*sym
)
193 gfc_symbol
*ifc
= sym
->ts
.interface
;
200 gfc_error ("PROCEDURE %qs at %L may not be used as its own interface",
201 sym
->name
, &sym
->declared_at
);
204 if (!check_proc_interface (ifc
, &sym
->declared_at
))
207 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
209 /* Resolve interface and copy attributes. */
210 resolve_symbol (ifc
);
211 if (ifc
->attr
.intrinsic
)
212 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
216 sym
->ts
= ifc
->result
->ts
;
217 sym
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
218 sym
->attr
.pointer
= ifc
->result
->attr
.pointer
;
219 sym
->attr
.dimension
= ifc
->result
->attr
.dimension
;
220 sym
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
221 sym
->as
= gfc_copy_array_spec (ifc
->result
->as
);
227 sym
->attr
.allocatable
= ifc
->attr
.allocatable
;
228 sym
->attr
.pointer
= ifc
->attr
.pointer
;
229 sym
->attr
.dimension
= ifc
->attr
.dimension
;
230 sym
->attr
.class_ok
= ifc
->attr
.class_ok
;
231 sym
->as
= gfc_copy_array_spec (ifc
->as
);
233 sym
->ts
.interface
= ifc
;
234 sym
->attr
.function
= ifc
->attr
.function
;
235 sym
->attr
.subroutine
= ifc
->attr
.subroutine
;
237 sym
->attr
.pure
= ifc
->attr
.pure
;
238 sym
->attr
.elemental
= ifc
->attr
.elemental
;
239 sym
->attr
.contiguous
= ifc
->attr
.contiguous
;
240 sym
->attr
.recursive
= ifc
->attr
.recursive
;
241 sym
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
242 sym
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
243 sym
->attr
.is_bind_c
= ifc
->attr
.is_bind_c
;
244 /* Copy char length. */
245 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
247 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
248 if (sym
->ts
.u
.cl
->length
&& !sym
->ts
.u
.cl
->resolved
249 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
258 /* Resolve types of formal argument lists. These have to be done early so that
259 the formal argument lists of module procedures can be copied to the
260 containing module before the individual procedures are resolved
261 individually. We also resolve argument lists of procedures in interface
262 blocks because they are self-contained scoping units.
264 Since a dummy argument cannot be a non-dummy procedure, the only
265 resort left for untyped names are the IMPLICIT types. */
268 resolve_formal_arglist (gfc_symbol
*proc
)
270 gfc_formal_arglist
*f
;
272 bool saved_specification_expr
;
275 if (proc
->result
!= NULL
)
280 if (gfc_elemental (proc
)
281 || sym
->attr
.pointer
|| sym
->attr
.allocatable
282 || (sym
->as
&& sym
->as
->rank
!= 0))
284 proc
->attr
.always_explicit
= 1;
285 sym
->attr
.always_explicit
= 1;
288 formal_arg_flag
= true;
290 for (f
= proc
->formal
; f
; f
= f
->next
)
298 /* Alternate return placeholder. */
299 if (gfc_elemental (proc
))
300 gfc_error ("Alternate return specifier in elemental subroutine "
301 "%qs at %L is not allowed", proc
->name
,
303 if (proc
->attr
.function
)
304 gfc_error ("Alternate return specifier in function "
305 "%qs at %L is not allowed", proc
->name
,
309 else if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
310 && !resolve_procedure_interface (sym
))
313 if (strcmp (proc
->name
, sym
->name
) == 0)
315 gfc_error ("Self-referential argument "
316 "%qs at %L is not allowed", sym
->name
,
321 if (sym
->attr
.if_source
!= IFSRC_UNKNOWN
)
322 resolve_formal_arglist (sym
);
324 if (sym
->attr
.subroutine
|| sym
->attr
.external
)
326 if (sym
->attr
.flavor
== FL_UNKNOWN
)
327 gfc_add_flavor (&sym
->attr
, FL_PROCEDURE
, sym
->name
, &sym
->declared_at
);
331 if (sym
->ts
.type
== BT_UNKNOWN
&& !proc
->attr
.intrinsic
332 && (!sym
->attr
.function
|| sym
->result
== sym
))
333 gfc_set_default_type (sym
, 1, sym
->ns
);
336 as
= sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
337 ? CLASS_DATA (sym
)->as
: sym
->as
;
339 saved_specification_expr
= specification_expr
;
340 specification_expr
= true;
341 gfc_resolve_array_spec (as
, 0);
342 specification_expr
= saved_specification_expr
;
344 /* We can't tell if an array with dimension (:) is assumed or deferred
345 shape until we know if it has the pointer or allocatable attributes.
347 if (as
&& as
->rank
> 0 && as
->type
== AS_DEFERRED
348 && ((sym
->ts
.type
!= BT_CLASS
349 && !(sym
->attr
.pointer
|| sym
->attr
.allocatable
))
350 || (sym
->ts
.type
== BT_CLASS
351 && !(CLASS_DATA (sym
)->attr
.class_pointer
352 || CLASS_DATA (sym
)->attr
.allocatable
)))
353 && sym
->attr
.flavor
!= FL_PROCEDURE
)
355 as
->type
= AS_ASSUMED_SHAPE
;
356 for (i
= 0; i
< as
->rank
; i
++)
357 as
->lower
[i
] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
360 if ((as
&& as
->rank
> 0 && as
->type
== AS_ASSUMED_SHAPE
)
361 || (as
&& as
->type
== AS_ASSUMED_RANK
)
362 || sym
->attr
.pointer
|| sym
->attr
.allocatable
|| sym
->attr
.target
363 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
364 && (CLASS_DATA (sym
)->attr
.class_pointer
365 || CLASS_DATA (sym
)->attr
.allocatable
366 || CLASS_DATA (sym
)->attr
.target
))
367 || sym
->attr
.optional
)
369 proc
->attr
.always_explicit
= 1;
371 proc
->result
->attr
.always_explicit
= 1;
374 /* If the flavor is unknown at this point, it has to be a variable.
375 A procedure specification would have already set the type. */
377 if (sym
->attr
.flavor
== FL_UNKNOWN
)
378 gfc_add_flavor (&sym
->attr
, FL_VARIABLE
, sym
->name
, &sym
->declared_at
);
382 if (sym
->attr
.flavor
== FL_PROCEDURE
)
387 gfc_error ("Dummy procedure %qs of PURE procedure at %L must "
388 "also be PURE", sym
->name
, &sym
->declared_at
);
392 else if (!sym
->attr
.pointer
)
394 if (proc
->attr
.function
&& sym
->attr
.intent
!= INTENT_IN
)
397 gfc_notify_std (GFC_STD_F2008
, "Argument %qs"
398 " of pure function %qs at %L with VALUE "
399 "attribute but without INTENT(IN)",
400 sym
->name
, proc
->name
, &sym
->declared_at
);
402 gfc_error ("Argument %qs of pure function %qs at %L must "
403 "be INTENT(IN) or VALUE", sym
->name
, proc
->name
,
407 if (proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_UNKNOWN
)
410 gfc_notify_std (GFC_STD_F2008
, "Argument %qs"
411 " of pure subroutine %qs at %L with VALUE "
412 "attribute but without INTENT", sym
->name
,
413 proc
->name
, &sym
->declared_at
);
415 gfc_error ("Argument %qs of pure subroutine %qs at %L "
416 "must have its INTENT specified or have the "
417 "VALUE attribute", sym
->name
, proc
->name
,
423 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.intent
== INTENT_OUT
)
425 gfc_error ("INTENT(OUT) argument %qs of pure procedure %qs at %L"
426 " may not be polymorphic", sym
->name
, proc
->name
,
432 if (proc
->attr
.implicit_pure
)
434 if (sym
->attr
.flavor
== FL_PROCEDURE
)
437 proc
->attr
.implicit_pure
= 0;
439 else if (!sym
->attr
.pointer
)
441 if (proc
->attr
.function
&& sym
->attr
.intent
!= INTENT_IN
443 proc
->attr
.implicit_pure
= 0;
445 if (proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_UNKNOWN
447 proc
->attr
.implicit_pure
= 0;
451 if (gfc_elemental (proc
))
454 if (sym
->attr
.codimension
455 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
456 && CLASS_DATA (sym
)->attr
.codimension
))
458 gfc_error ("Coarray dummy argument %qs at %L to elemental "
459 "procedure", sym
->name
, &sym
->declared_at
);
463 if (sym
->as
|| (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
464 && CLASS_DATA (sym
)->as
))
466 gfc_error ("Argument %qs of elemental procedure at %L must "
467 "be scalar", sym
->name
, &sym
->declared_at
);
471 if (sym
->attr
.allocatable
472 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
473 && CLASS_DATA (sym
)->attr
.allocatable
))
475 gfc_error ("Argument %qs of elemental procedure at %L cannot "
476 "have the ALLOCATABLE attribute", sym
->name
,
481 if (sym
->attr
.pointer
482 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
483 && CLASS_DATA (sym
)->attr
.class_pointer
))
485 gfc_error ("Argument %qs of elemental procedure at %L cannot "
486 "have the POINTER attribute", sym
->name
,
491 if (sym
->attr
.flavor
== FL_PROCEDURE
)
493 gfc_error ("Dummy procedure %qs not allowed in elemental "
494 "procedure %qs at %L", sym
->name
, proc
->name
,
499 /* Fortran 2008 Corrigendum 1, C1290a. */
500 if (sym
->attr
.intent
== INTENT_UNKNOWN
&& !sym
->attr
.value
)
502 gfc_error ("Argument %qs of elemental procedure %qs at %L must "
503 "have its INTENT specified or have the VALUE "
504 "attribute", sym
->name
, proc
->name
,
510 /* Each dummy shall be specified to be scalar. */
511 if (proc
->attr
.proc
== PROC_ST_FUNCTION
)
515 /* F03:C1263 (R1238) The function-name and each dummy-arg-name
516 shall be specified, explicitly or implicitly, to be scalar. */
517 gfc_error ("Argument '%s' of statement function '%s' at %L "
518 "must be scalar", sym
->name
, proc
->name
,
523 if (sym
->ts
.type
== BT_CHARACTER
)
525 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
526 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
528 gfc_error ("Character-valued argument %qs of statement "
529 "function at %L must have constant length",
530 sym
->name
, &sym
->declared_at
);
536 formal_arg_flag
= false;
540 /* Work function called when searching for symbols that have argument lists
541 associated with them. */
544 find_arglists (gfc_symbol
*sym
)
546 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
|| sym
->ns
!= gfc_current_ns
547 || gfc_fl_struct (sym
->attr
.flavor
) || sym
->attr
.intrinsic
)
550 resolve_formal_arglist (sym
);
554 /* Given a namespace, resolve all formal argument lists within the namespace.
558 resolve_formal_arglists (gfc_namespace
*ns
)
563 gfc_traverse_ns (ns
, find_arglists
);
568 resolve_contained_fntype (gfc_symbol
*sym
, gfc_namespace
*ns
)
572 if (sym
&& sym
->attr
.flavor
== FL_PROCEDURE
574 && sym
->ns
->parent
->proc_name
575 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_PROCEDURE
576 && !strcmp (sym
->name
, sym
->ns
->parent
->proc_name
->name
))
577 gfc_error ("Contained procedure %qs at %L has the same name as its "
578 "encompassing procedure", sym
->name
, &sym
->declared_at
);
580 /* If this namespace is not a function or an entry master function,
582 if (! sym
|| !(sym
->attr
.function
|| sym
->attr
.flavor
== FL_VARIABLE
)
583 || sym
->attr
.entry_master
)
586 /* Try to find out of what the return type is. */
587 if (sym
->result
->ts
.type
== BT_UNKNOWN
&& sym
->result
->ts
.interface
== NULL
)
589 t
= gfc_set_default_type (sym
->result
, 0, ns
);
591 if (!t
&& !sym
->result
->attr
.untyped
)
593 if (sym
->result
== sym
)
594 gfc_error ("Contained function %qs at %L has no IMPLICIT type",
595 sym
->name
, &sym
->declared_at
);
596 else if (!sym
->result
->attr
.proc_pointer
)
597 gfc_error ("Result %qs of contained function %qs at %L has "
598 "no IMPLICIT type", sym
->result
->name
, sym
->name
,
599 &sym
->result
->declared_at
);
600 sym
->result
->attr
.untyped
= 1;
604 /* Fortran 95 Draft Standard, page 51, Section 5.1.1.5, on the Character
605 type, lists the only ways a character length value of * can be used:
606 dummy arguments of procedures, named constants, and function results
607 in external functions. Internal function results and results of module
608 procedures are not on this list, ergo, not permitted. */
610 if (sym
->result
->ts
.type
== BT_CHARACTER
)
612 gfc_charlen
*cl
= sym
->result
->ts
.u
.cl
;
613 if ((!cl
|| !cl
->length
) && !sym
->result
->ts
.deferred
)
615 /* See if this is a module-procedure and adapt error message
618 gcc_assert (ns
->parent
&& ns
->parent
->proc_name
);
619 module_proc
= (ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
);
621 gfc_error (module_proc
622 ? G_("Character-valued module procedure %qs at %L"
623 " must not be assumed length")
624 : G_("Character-valued internal function %qs at %L"
625 " must not be assumed length"),
626 sym
->name
, &sym
->declared_at
);
632 /* Add NEW_ARGS to the formal argument list of PROC, taking care not to
633 introduce duplicates. */
636 merge_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
638 gfc_formal_arglist
*f
, *new_arglist
;
641 for (; new_args
!= NULL
; new_args
= new_args
->next
)
643 new_sym
= new_args
->sym
;
644 /* See if this arg is already in the formal argument list. */
645 for (f
= proc
->formal
; f
; f
= f
->next
)
647 if (new_sym
== f
->sym
)
654 /* Add a new argument. Argument order is not important. */
655 new_arglist
= gfc_get_formal_arglist ();
656 new_arglist
->sym
= new_sym
;
657 new_arglist
->next
= proc
->formal
;
658 proc
->formal
= new_arglist
;
663 /* Flag the arguments that are not present in all entries. */
666 check_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
668 gfc_formal_arglist
*f
, *head
;
671 for (f
= proc
->formal
; f
; f
= f
->next
)
676 for (new_args
= head
; new_args
; new_args
= new_args
->next
)
678 if (new_args
->sym
== f
->sym
)
685 f
->sym
->attr
.not_always_present
= 1;
690 /* Resolve alternate entry points. If a symbol has multiple entry points we
691 create a new master symbol for the main routine, and turn the existing
692 symbol into an entry point. */
695 resolve_entries (gfc_namespace
*ns
)
697 gfc_namespace
*old_ns
;
701 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
702 static int master_count
= 0;
704 if (ns
->proc_name
== NULL
)
707 /* No need to do anything if this procedure doesn't have alternate entry
712 /* We may already have resolved alternate entry points. */
713 if (ns
->proc_name
->attr
.entry_master
)
716 /* If this isn't a procedure something has gone horribly wrong. */
717 gcc_assert (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
);
719 /* Remember the current namespace. */
720 old_ns
= gfc_current_ns
;
724 /* Add the main entry point to the list of entry points. */
725 el
= gfc_get_entry_list ();
726 el
->sym
= ns
->proc_name
;
728 el
->next
= ns
->entries
;
730 ns
->proc_name
->attr
.entry
= 1;
732 /* If it is a module function, it needs to be in the right namespace
733 so that gfc_get_fake_result_decl can gather up the results. The
734 need for this arose in get_proc_name, where these beasts were
735 left in their own namespace, to keep prior references linked to
736 the entry declaration.*/
737 if (ns
->proc_name
->attr
.function
738 && ns
->parent
&& ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
741 /* Do the same for entries where the master is not a module
742 procedure. These are retained in the module namespace because
743 of the module procedure declaration. */
744 for (el
= el
->next
; el
; el
= el
->next
)
745 if (el
->sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
746 && el
->sym
->attr
.mod_proc
)
750 /* Add an entry statement for it. */
751 c
= gfc_get_code (EXEC_ENTRY
);
756 /* Create a new symbol for the master function. */
757 /* Give the internal function a unique name (within this file).
758 Also include the function name so the user has some hope of figuring
759 out what is going on. */
760 snprintf (name
, GFC_MAX_SYMBOL_LEN
, "master.%d.%s",
761 master_count
++, ns
->proc_name
->name
);
762 gfc_get_ha_symbol (name
, &proc
);
763 gcc_assert (proc
!= NULL
);
765 gfc_add_procedure (&proc
->attr
, PROC_INTERNAL
, proc
->name
, NULL
);
766 if (ns
->proc_name
->attr
.subroutine
)
767 gfc_add_subroutine (&proc
->attr
, proc
->name
, NULL
);
771 gfc_typespec
*ts
, *fts
;
772 gfc_array_spec
*as
, *fas
;
773 gfc_add_function (&proc
->attr
, proc
->name
, NULL
);
775 fas
= ns
->entries
->sym
->as
;
776 fas
= fas
? fas
: ns
->entries
->sym
->result
->as
;
777 fts
= &ns
->entries
->sym
->result
->ts
;
778 if (fts
->type
== BT_UNKNOWN
)
779 fts
= gfc_get_default_type (ns
->entries
->sym
->result
->name
, NULL
);
780 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
782 ts
= &el
->sym
->result
->ts
;
784 as
= as
? as
: el
->sym
->result
->as
;
785 if (ts
->type
== BT_UNKNOWN
)
786 ts
= gfc_get_default_type (el
->sym
->result
->name
, NULL
);
788 if (! gfc_compare_types (ts
, fts
)
789 || (el
->sym
->result
->attr
.dimension
790 != ns
->entries
->sym
->result
->attr
.dimension
)
791 || (el
->sym
->result
->attr
.pointer
792 != ns
->entries
->sym
->result
->attr
.pointer
))
794 else if (as
&& fas
&& ns
->entries
->sym
->result
!= el
->sym
->result
795 && gfc_compare_array_spec (as
, fas
) == 0)
796 gfc_error ("Function %s at %L has entries with mismatched "
797 "array specifications", ns
->entries
->sym
->name
,
798 &ns
->entries
->sym
->declared_at
);
799 /* The characteristics need to match and thus both need to have
800 the same string length, i.e. both len=*, or both len=4.
801 Having both len=<variable> is also possible, but difficult to
802 check at compile time. */
803 else if (ts
->type
== BT_CHARACTER
&& ts
->u
.cl
&& fts
->u
.cl
804 && (((ts
->u
.cl
->length
&& !fts
->u
.cl
->length
)
805 ||(!ts
->u
.cl
->length
&& fts
->u
.cl
->length
))
807 && ts
->u
.cl
->length
->expr_type
808 != fts
->u
.cl
->length
->expr_type
)
810 && ts
->u
.cl
->length
->expr_type
== EXPR_CONSTANT
811 && mpz_cmp (ts
->u
.cl
->length
->value
.integer
,
812 fts
->u
.cl
->length
->value
.integer
) != 0)))
813 gfc_notify_std (GFC_STD_GNU
, "Function %s at %L with "
814 "entries returning variables of different "
815 "string lengths", ns
->entries
->sym
->name
,
816 &ns
->entries
->sym
->declared_at
);
821 sym
= ns
->entries
->sym
->result
;
822 /* All result types the same. */
824 if (sym
->attr
.dimension
)
825 gfc_set_array_spec (proc
, gfc_copy_array_spec (sym
->as
), NULL
);
826 if (sym
->attr
.pointer
)
827 gfc_add_pointer (&proc
->attr
, NULL
);
831 /* Otherwise the result will be passed through a union by
833 proc
->attr
.mixed_entry_master
= 1;
834 for (el
= ns
->entries
; el
; el
= el
->next
)
836 sym
= el
->sym
->result
;
837 if (sym
->attr
.dimension
)
839 if (el
== ns
->entries
)
840 gfc_error ("FUNCTION result %s can't be an array in "
841 "FUNCTION %s at %L", sym
->name
,
842 ns
->entries
->sym
->name
, &sym
->declared_at
);
844 gfc_error ("ENTRY result %s can't be an array in "
845 "FUNCTION %s at %L", sym
->name
,
846 ns
->entries
->sym
->name
, &sym
->declared_at
);
848 else if (sym
->attr
.pointer
)
850 if (el
== ns
->entries
)
851 gfc_error ("FUNCTION result %s can't be a POINTER in "
852 "FUNCTION %s at %L", sym
->name
,
853 ns
->entries
->sym
->name
, &sym
->declared_at
);
855 gfc_error ("ENTRY result %s can't be a POINTER in "
856 "FUNCTION %s at %L", sym
->name
,
857 ns
->entries
->sym
->name
, &sym
->declared_at
);
862 if (ts
->type
== BT_UNKNOWN
)
863 ts
= gfc_get_default_type (sym
->name
, NULL
);
867 if (ts
->kind
== gfc_default_integer_kind
)
871 if (ts
->kind
== gfc_default_real_kind
872 || ts
->kind
== gfc_default_double_kind
)
876 if (ts
->kind
== gfc_default_complex_kind
)
880 if (ts
->kind
== gfc_default_logical_kind
)
884 /* We will issue error elsewhere. */
892 if (el
== ns
->entries
)
893 gfc_error ("FUNCTION result %s can't be of type %s "
894 "in FUNCTION %s at %L", sym
->name
,
895 gfc_typename (ts
), ns
->entries
->sym
->name
,
898 gfc_error ("ENTRY result %s can't be of type %s "
899 "in FUNCTION %s at %L", sym
->name
,
900 gfc_typename (ts
), ns
->entries
->sym
->name
,
907 proc
->attr
.access
= ACCESS_PRIVATE
;
908 proc
->attr
.entry_master
= 1;
910 /* Merge all the entry point arguments. */
911 for (el
= ns
->entries
; el
; el
= el
->next
)
912 merge_argument_lists (proc
, el
->sym
->formal
);
914 /* Check the master formal arguments for any that are not
915 present in all entry points. */
916 for (el
= ns
->entries
; el
; el
= el
->next
)
917 check_argument_lists (proc
, el
->sym
->formal
);
919 /* Use the master function for the function body. */
920 ns
->proc_name
= proc
;
922 /* Finalize the new symbols. */
923 gfc_commit_symbols ();
925 /* Restore the original namespace. */
926 gfc_current_ns
= old_ns
;
930 /* Resolve common variables. */
932 resolve_common_vars (gfc_common_head
*common_block
, bool named_common
)
934 gfc_symbol
*csym
= common_block
->head
;
936 for (; csym
; csym
= csym
->common_next
)
938 /* gfc_add_in_common may have been called before, but the reported errors
939 have been ignored to continue parsing.
940 We do the checks again here. */
941 if (!csym
->attr
.use_assoc
)
942 gfc_add_in_common (&csym
->attr
, csym
->name
, &common_block
->where
);
944 if (csym
->value
|| csym
->attr
.data
)
946 if (!csym
->ns
->is_block_data
)
947 gfc_notify_std (GFC_STD_GNU
, "Variable %qs at %L is in COMMON "
948 "but only in BLOCK DATA initialization is "
949 "allowed", csym
->name
, &csym
->declared_at
);
950 else if (!named_common
)
951 gfc_notify_std (GFC_STD_GNU
, "Initialized variable %qs at %L is "
952 "in a blank COMMON but initialization is only "
953 "allowed in named common blocks", csym
->name
,
957 if (UNLIMITED_POLY (csym
))
958 gfc_error_now ("%qs in cannot appear in COMMON at %L "
959 "[F2008:C5100]", csym
->name
, &csym
->declared_at
);
961 if (csym
->ts
.type
!= BT_DERIVED
)
964 if (!(csym
->ts
.u
.derived
->attr
.sequence
965 || csym
->ts
.u
.derived
->attr
.is_bind_c
))
966 gfc_error_now ("Derived type variable %qs in COMMON at %L "
967 "has neither the SEQUENCE nor the BIND(C) "
968 "attribute", csym
->name
, &csym
->declared_at
);
969 if (csym
->ts
.u
.derived
->attr
.alloc_comp
)
970 gfc_error_now ("Derived type variable %qs in COMMON at %L "
971 "has an ultimate component that is "
972 "allocatable", csym
->name
, &csym
->declared_at
);
973 if (gfc_has_default_initializer (csym
->ts
.u
.derived
))
974 gfc_error_now ("Derived type variable %qs in COMMON at %L "
975 "may not have default initializer", csym
->name
,
978 if (csym
->attr
.flavor
== FL_UNKNOWN
&& !csym
->attr
.proc_pointer
)
979 gfc_add_flavor (&csym
->attr
, FL_VARIABLE
, csym
->name
, &csym
->declared_at
);
983 /* Resolve common blocks. */
985 resolve_common_blocks (gfc_symtree
*common_root
)
990 if (common_root
== NULL
)
993 if (common_root
->left
)
994 resolve_common_blocks (common_root
->left
);
995 if (common_root
->right
)
996 resolve_common_blocks (common_root
->right
);
998 resolve_common_vars (common_root
->n
.common
, true);
1000 /* The common name is a global name - in Fortran 2003 also if it has a
1001 C binding name, since Fortran 2008 only the C binding name is a global
1003 if (!common_root
->n
.common
->binding_label
1004 || gfc_notification_std (GFC_STD_F2008
))
1006 gsym
= gfc_find_gsymbol (gfc_gsym_root
,
1007 common_root
->n
.common
->name
);
1009 if (gsym
&& gfc_notification_std (GFC_STD_F2008
)
1010 && gsym
->type
== GSYM_COMMON
1011 && ((common_root
->n
.common
->binding_label
1012 && (!gsym
->binding_label
1013 || strcmp (common_root
->n
.common
->binding_label
,
1014 gsym
->binding_label
) != 0))
1015 || (!common_root
->n
.common
->binding_label
1016 && gsym
->binding_label
)))
1018 gfc_error ("In Fortran 2003 COMMON %qs block at %L is a global "
1019 "identifier and must thus have the same binding name "
1020 "as the same-named COMMON block at %L: %s vs %s",
1021 common_root
->n
.common
->name
, &common_root
->n
.common
->where
,
1023 common_root
->n
.common
->binding_label
1024 ? common_root
->n
.common
->binding_label
: "(blank)",
1025 gsym
->binding_label
? gsym
->binding_label
: "(blank)");
1029 if (gsym
&& gsym
->type
!= GSYM_COMMON
1030 && !common_root
->n
.common
->binding_label
)
1032 gfc_error ("COMMON block %qs at %L uses the same global identifier "
1034 common_root
->n
.common
->name
, &common_root
->n
.common
->where
,
1038 if (gsym
&& gsym
->type
!= GSYM_COMMON
)
1040 gfc_error ("Fortran 2008: COMMON block %qs with binding label at "
1041 "%L sharing the identifier with global non-COMMON-block "
1042 "entity at %L", common_root
->n
.common
->name
,
1043 &common_root
->n
.common
->where
, &gsym
->where
);
1048 gsym
= gfc_get_gsymbol (common_root
->n
.common
->name
);
1049 gsym
->type
= GSYM_COMMON
;
1050 gsym
->where
= common_root
->n
.common
->where
;
1056 if (common_root
->n
.common
->binding_label
)
1058 gsym
= gfc_find_gsymbol (gfc_gsym_root
,
1059 common_root
->n
.common
->binding_label
);
1060 if (gsym
&& gsym
->type
!= GSYM_COMMON
)
1062 gfc_error ("COMMON block at %L with binding label %qs uses the same "
1063 "global identifier as entity at %L",
1064 &common_root
->n
.common
->where
,
1065 common_root
->n
.common
->binding_label
, &gsym
->where
);
1070 gsym
= gfc_get_gsymbol (common_root
->n
.common
->binding_label
);
1071 gsym
->type
= GSYM_COMMON
;
1072 gsym
->where
= common_root
->n
.common
->where
;
1078 gfc_find_symbol (common_root
->name
, gfc_current_ns
, 0, &sym
);
1082 if (sym
->attr
.flavor
== FL_PARAMETER
)
1083 gfc_error ("COMMON block %qs at %L is used as PARAMETER at %L",
1084 sym
->name
, &common_root
->n
.common
->where
, &sym
->declared_at
);
1086 if (sym
->attr
.external
)
1087 gfc_error ("COMMON block %qs at %L can not have the EXTERNAL attribute",
1088 sym
->name
, &common_root
->n
.common
->where
);
1090 if (sym
->attr
.intrinsic
)
1091 gfc_error ("COMMON block %qs at %L is also an intrinsic procedure",
1092 sym
->name
, &common_root
->n
.common
->where
);
1093 else if (sym
->attr
.result
1094 || gfc_is_function_return_value (sym
, gfc_current_ns
))
1095 gfc_notify_std (GFC_STD_F2003
, "COMMON block %qs at %L "
1096 "that is also a function result", sym
->name
,
1097 &common_root
->n
.common
->where
);
1098 else if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.proc
!= PROC_INTERNAL
1099 && sym
->attr
.proc
!= PROC_ST_FUNCTION
)
1100 gfc_notify_std (GFC_STD_F2003
, "COMMON block %qs at %L "
1101 "that is also a global procedure", sym
->name
,
1102 &common_root
->n
.common
->where
);
1106 /* Resolve contained function types. Because contained functions can call one
1107 another, they have to be worked out before any of the contained procedures
1110 The good news is that if a function doesn't already have a type, the only
1111 way it can get one is through an IMPLICIT type or a RESULT variable, because
1112 by definition contained functions are contained namespace they're contained
1113 in, not in a sibling or parent namespace. */
1116 resolve_contained_functions (gfc_namespace
*ns
)
1118 gfc_namespace
*child
;
1121 resolve_formal_arglists (ns
);
1123 for (child
= ns
->contained
; child
; child
= child
->sibling
)
1125 /* Resolve alternate entry points first. */
1126 resolve_entries (child
);
1128 /* Then check function return types. */
1129 resolve_contained_fntype (child
->proc_name
, child
);
1130 for (el
= child
->entries
; el
; el
= el
->next
)
1131 resolve_contained_fntype (el
->sym
, child
);
1137 /* A Parameterized Derived Type constructor must contain values for
1138 the PDT KIND parameters or they must have a default initializer.
1139 Go through the constructor picking out the KIND expressions,
1140 storing them in 'param_list' and then call gfc_get_pdt_instance
1141 to obtain the PDT instance. */
1143 static gfc_actual_arglist
*param_list
, *param_tail
, *param
;
1146 get_pdt_spec_expr (gfc_component
*c
, gfc_expr
*expr
)
1148 param
= gfc_get_actual_arglist ();
1150 param_list
= param_tail
= param
;
1153 param_tail
->next
= param
;
1154 param_tail
= param_tail
->next
;
1157 param_tail
->name
= c
->name
;
1159 param_tail
->expr
= gfc_copy_expr (expr
);
1160 else if (c
->initializer
)
1161 param_tail
->expr
= gfc_copy_expr (c
->initializer
);
1164 param_tail
->spec_type
= SPEC_ASSUMED
;
1165 if (c
->attr
.pdt_kind
)
1167 gfc_error ("The KIND parameter %qs in the PDT constructor "
1168 "at %C has no value", param
->name
);
1177 get_pdt_constructor (gfc_expr
*expr
, gfc_constructor
**constr
,
1178 gfc_symbol
*derived
)
1180 gfc_constructor
*cons
= NULL
;
1181 gfc_component
*comp
;
1184 if (expr
&& expr
->expr_type
== EXPR_STRUCTURE
)
1185 cons
= gfc_constructor_first (expr
->value
.constructor
);
1190 comp
= derived
->components
;
1192 for (; comp
&& cons
; comp
= comp
->next
, cons
= gfc_constructor_next (cons
))
1195 && cons
->expr
->expr_type
== EXPR_STRUCTURE
1196 && comp
->ts
.type
== BT_DERIVED
)
1198 t
= get_pdt_constructor (cons
->expr
, NULL
, comp
->ts
.u
.derived
);
1202 else if (comp
->ts
.type
== BT_DERIVED
)
1204 t
= get_pdt_constructor (NULL
, &cons
, comp
->ts
.u
.derived
);
1208 else if ((comp
->attr
.pdt_kind
|| comp
->attr
.pdt_len
)
1209 && derived
->attr
.pdt_template
)
1211 t
= get_pdt_spec_expr (comp
, cons
->expr
);
1220 static bool resolve_fl_derived0 (gfc_symbol
*sym
);
1221 static bool resolve_fl_struct (gfc_symbol
*sym
);
1224 /* Resolve all of the elements of a structure constructor and make sure that
1225 the types are correct. The 'init' flag indicates that the given
1226 constructor is an initializer. */
1229 resolve_structure_cons (gfc_expr
*expr
, int init
)
1231 gfc_constructor
*cons
;
1232 gfc_component
*comp
;
1238 if (expr
->ts
.type
== BT_DERIVED
|| expr
->ts
.type
== BT_UNION
)
1240 if (expr
->ts
.u
.derived
->attr
.flavor
== FL_DERIVED
)
1241 resolve_fl_derived0 (expr
->ts
.u
.derived
);
1243 resolve_fl_struct (expr
->ts
.u
.derived
);
1245 /* If this is a Parameterized Derived Type template, find the
1246 instance corresponding to the PDT kind parameters. */
1247 if (expr
->ts
.u
.derived
->attr
.pdt_template
)
1250 t
= get_pdt_constructor (expr
, NULL
, expr
->ts
.u
.derived
);
1253 gfc_get_pdt_instance (param_list
, &expr
->ts
.u
.derived
, NULL
);
1255 expr
->param_list
= gfc_copy_actual_arglist (param_list
);
1258 gfc_free_actual_arglist (param_list
);
1260 if (!expr
->ts
.u
.derived
->attr
.pdt_type
)
1265 cons
= gfc_constructor_first (expr
->value
.constructor
);
1267 /* A constructor may have references if it is the result of substituting a
1268 parameter variable. In this case we just pull out the component we
1271 comp
= expr
->ref
->u
.c
.sym
->components
;
1273 comp
= expr
->ts
.u
.derived
->components
;
1275 for (; comp
&& cons
; comp
= comp
->next
, cons
= gfc_constructor_next (cons
))
1282 /* Unions use an EXPR_NULL contrived expression to tell the translation
1283 phase to generate an initializer of the appropriate length.
1285 if (cons
->expr
->ts
.type
== BT_UNION
&& cons
->expr
->expr_type
== EXPR_NULL
)
1288 if (!gfc_resolve_expr (cons
->expr
))
1294 rank
= comp
->as
? comp
->as
->rank
: 0;
1295 if (comp
->ts
.type
== BT_CLASS
1296 && !comp
->ts
.u
.derived
->attr
.unlimited_polymorphic
1297 && CLASS_DATA (comp
)->as
)
1298 rank
= CLASS_DATA (comp
)->as
->rank
;
1300 if (cons
->expr
->expr_type
!= EXPR_NULL
&& rank
!= cons
->expr
->rank
1301 && (comp
->attr
.allocatable
|| cons
->expr
->rank
))
1303 gfc_error ("The rank of the element in the structure "
1304 "constructor at %L does not match that of the "
1305 "component (%d/%d)", &cons
->expr
->where
,
1306 cons
->expr
->rank
, rank
);
1310 /* If we don't have the right type, try to convert it. */
1312 if (!comp
->attr
.proc_pointer
&&
1313 !gfc_compare_types (&cons
->expr
->ts
, &comp
->ts
))
1315 if (strcmp (comp
->name
, "_extends") == 0)
1317 /* Can afford to be brutal with the _extends initializer.
1318 The derived type can get lost because it is PRIVATE
1319 but it is not usage constrained by the standard. */
1320 cons
->expr
->ts
= comp
->ts
;
1322 else if (comp
->attr
.pointer
&& cons
->expr
->ts
.type
!= BT_UNKNOWN
)
1324 gfc_error ("The element in the structure constructor at %L, "
1325 "for pointer component %qs, is %s but should be %s",
1326 &cons
->expr
->where
, comp
->name
,
1327 gfc_basic_typename (cons
->expr
->ts
.type
),
1328 gfc_basic_typename (comp
->ts
.type
));
1333 bool t2
= gfc_convert_type (cons
->expr
, &comp
->ts
, 1);
1339 /* For strings, the length of the constructor should be the same as
1340 the one of the structure, ensure this if the lengths are known at
1341 compile time and when we are dealing with PARAMETER or structure
1343 if (cons
->expr
->ts
.type
== BT_CHARACTER
&& comp
->ts
.u
.cl
1344 && comp
->ts
.u
.cl
->length
1345 && comp
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
1346 && cons
->expr
->ts
.u
.cl
&& cons
->expr
->ts
.u
.cl
->length
1347 && cons
->expr
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
1348 && cons
->expr
->rank
!= 0
1349 && mpz_cmp (cons
->expr
->ts
.u
.cl
->length
->value
.integer
,
1350 comp
->ts
.u
.cl
->length
->value
.integer
) != 0)
1352 if (cons
->expr
->expr_type
== EXPR_VARIABLE
1353 && cons
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
)
1355 /* Wrap the parameter in an array constructor (EXPR_ARRAY)
1356 to make use of the gfc_resolve_character_array_constructor
1357 machinery. The expression is later simplified away to
1358 an array of string literals. */
1359 gfc_expr
*para
= cons
->expr
;
1360 cons
->expr
= gfc_get_expr ();
1361 cons
->expr
->ts
= para
->ts
;
1362 cons
->expr
->where
= para
->where
;
1363 cons
->expr
->expr_type
= EXPR_ARRAY
;
1364 cons
->expr
->rank
= para
->rank
;
1365 cons
->expr
->shape
= gfc_copy_shape (para
->shape
, para
->rank
);
1366 gfc_constructor_append_expr (&cons
->expr
->value
.constructor
,
1367 para
, &cons
->expr
->where
);
1370 if (cons
->expr
->expr_type
== EXPR_ARRAY
)
1372 /* Rely on the cleanup of the namespace to deal correctly with
1373 the old charlen. (There was a block here that attempted to
1374 remove the charlen but broke the chain in so doing.) */
1375 cons
->expr
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1376 cons
->expr
->ts
.u
.cl
->length_from_typespec
= true;
1377 cons
->expr
->ts
.u
.cl
->length
= gfc_copy_expr (comp
->ts
.u
.cl
->length
);
1378 gfc_resolve_character_array_constructor (cons
->expr
);
1382 if (cons
->expr
->expr_type
== EXPR_NULL
1383 && !(comp
->attr
.pointer
|| comp
->attr
.allocatable
1384 || comp
->attr
.proc_pointer
|| comp
->ts
.f90_type
== BT_VOID
1385 || (comp
->ts
.type
== BT_CLASS
1386 && (CLASS_DATA (comp
)->attr
.class_pointer
1387 || CLASS_DATA (comp
)->attr
.allocatable
))))
1390 gfc_error ("The NULL in the structure constructor at %L is "
1391 "being applied to component %qs, which is neither "
1392 "a POINTER nor ALLOCATABLE", &cons
->expr
->where
,
1396 if (comp
->attr
.proc_pointer
&& comp
->ts
.interface
)
1398 /* Check procedure pointer interface. */
1399 gfc_symbol
*s2
= NULL
;
1404 c2
= gfc_get_proc_ptr_comp (cons
->expr
);
1407 s2
= c2
->ts
.interface
;
1410 else if (cons
->expr
->expr_type
== EXPR_FUNCTION
)
1412 s2
= cons
->expr
->symtree
->n
.sym
->result
;
1413 name
= cons
->expr
->symtree
->n
.sym
->result
->name
;
1415 else if (cons
->expr
->expr_type
!= EXPR_NULL
)
1417 s2
= cons
->expr
->symtree
->n
.sym
;
1418 name
= cons
->expr
->symtree
->n
.sym
->name
;
1421 if (s2
&& !gfc_compare_interfaces (comp
->ts
.interface
, s2
, name
, 0, 1,
1422 err
, sizeof (err
), NULL
, NULL
))
1424 gfc_error_opt (OPT_Wargument_mismatch
,
1425 "Interface mismatch for procedure-pointer "
1426 "component %qs in structure constructor at %L:"
1427 " %s", comp
->name
, &cons
->expr
->where
, err
);
1432 if (!comp
->attr
.pointer
|| comp
->attr
.proc_pointer
1433 || cons
->expr
->expr_type
== EXPR_NULL
)
1436 a
= gfc_expr_attr (cons
->expr
);
1438 if (!a
.pointer
&& !a
.target
)
1441 gfc_error ("The element in the structure constructor at %L, "
1442 "for pointer component %qs should be a POINTER or "
1443 "a TARGET", &cons
->expr
->where
, comp
->name
);
1448 /* F08:C461. Additional checks for pointer initialization. */
1452 gfc_error ("Pointer initialization target at %L "
1453 "must not be ALLOCATABLE", &cons
->expr
->where
);
1458 gfc_error ("Pointer initialization target at %L "
1459 "must have the SAVE attribute", &cons
->expr
->where
);
1463 /* F2003, C1272 (3). */
1464 bool impure
= cons
->expr
->expr_type
== EXPR_VARIABLE
1465 && (gfc_impure_variable (cons
->expr
->symtree
->n
.sym
)
1466 || gfc_is_coindexed (cons
->expr
));
1467 if (impure
&& gfc_pure (NULL
))
1470 gfc_error ("Invalid expression in the structure constructor for "
1471 "pointer component %qs at %L in PURE procedure",
1472 comp
->name
, &cons
->expr
->where
);
1476 gfc_unset_implicit_pure (NULL
);
1483 /****************** Expression name resolution ******************/
1485 /* Returns 0 if a symbol was not declared with a type or
1486 attribute declaration statement, nonzero otherwise. */
1489 was_declared (gfc_symbol
*sym
)
1495 if (!a
.implicit_type
&& sym
->ts
.type
!= BT_UNKNOWN
)
1498 if (a
.allocatable
|| a
.dimension
|| a
.dummy
|| a
.external
|| a
.intrinsic
1499 || a
.optional
|| a
.pointer
|| a
.save
|| a
.target
|| a
.volatile_
1500 || a
.value
|| a
.access
!= ACCESS_UNKNOWN
|| a
.intent
!= INTENT_UNKNOWN
1501 || a
.asynchronous
|| a
.codimension
)
1508 /* Determine if a symbol is generic or not. */
1511 generic_sym (gfc_symbol
*sym
)
1515 if (sym
->attr
.generic
||
1516 (sym
->attr
.intrinsic
&& gfc_generic_intrinsic (sym
->name
)))
1519 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1522 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1529 return generic_sym (s
);
1536 /* Determine if a symbol is specific or not. */
1539 specific_sym (gfc_symbol
*sym
)
1543 if (sym
->attr
.if_source
== IFSRC_IFBODY
1544 || sym
->attr
.proc
== PROC_MODULE
1545 || sym
->attr
.proc
== PROC_INTERNAL
1546 || sym
->attr
.proc
== PROC_ST_FUNCTION
1547 || (sym
->attr
.intrinsic
&& gfc_specific_intrinsic (sym
->name
))
1548 || sym
->attr
.external
)
1551 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1554 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1556 return (s
== NULL
) ? 0 : specific_sym (s
);
1560 /* Figure out if the procedure is specific, generic or unknown. */
1563 { PTYPE_GENERIC
= 1, PTYPE_SPECIFIC
, PTYPE_UNKNOWN
};
1566 procedure_kind (gfc_symbol
*sym
)
1568 if (generic_sym (sym
))
1569 return PTYPE_GENERIC
;
1571 if (specific_sym (sym
))
1572 return PTYPE_SPECIFIC
;
1574 return PTYPE_UNKNOWN
;
1577 /* Check references to assumed size arrays. The flag need_full_assumed_size
1578 is nonzero when matching actual arguments. */
1580 static int need_full_assumed_size
= 0;
1583 check_assumed_size_reference (gfc_symbol
*sym
, gfc_expr
*e
)
1585 if (need_full_assumed_size
|| !(sym
->as
&& sym
->as
->type
== AS_ASSUMED_SIZE
))
1588 /* FIXME: The comparison "e->ref->u.ar.type == AR_FULL" is wrong.
1589 What should it be? */
1590 if (e
->ref
&& (e
->ref
->u
.ar
.end
[e
->ref
->u
.ar
.as
->rank
- 1] == NULL
)
1591 && (e
->ref
->u
.ar
.as
->type
== AS_ASSUMED_SIZE
)
1592 && (e
->ref
->u
.ar
.type
== AR_FULL
))
1594 gfc_error ("The upper bound in the last dimension must "
1595 "appear in the reference to the assumed size "
1596 "array %qs at %L", sym
->name
, &e
->where
);
1603 /* Look for bad assumed size array references in argument expressions
1604 of elemental and array valued intrinsic procedures. Since this is
1605 called from procedure resolution functions, it only recurses at
1609 resolve_assumed_size_actual (gfc_expr
*e
)
1614 switch (e
->expr_type
)
1617 if (e
->symtree
&& check_assumed_size_reference (e
->symtree
->n
.sym
, e
))
1622 if (resolve_assumed_size_actual (e
->value
.op
.op1
)
1623 || resolve_assumed_size_actual (e
->value
.op
.op2
))
1634 /* Check a generic procedure, passed as an actual argument, to see if
1635 there is a matching specific name. If none, it is an error, and if
1636 more than one, the reference is ambiguous. */
1638 count_specific_procs (gfc_expr
*e
)
1645 sym
= e
->symtree
->n
.sym
;
1647 for (p
= sym
->generic
; p
; p
= p
->next
)
1648 if (strcmp (sym
->name
, p
->sym
->name
) == 0)
1650 e
->symtree
= gfc_find_symtree (p
->sym
->ns
->sym_root
,
1656 gfc_error ("%qs at %L is ambiguous", e
->symtree
->n
.sym
->name
,
1660 gfc_error ("GENERIC procedure %qs is not allowed as an actual "
1661 "argument at %L", sym
->name
, &e
->where
);
1667 /* See if a call to sym could possibly be a not allowed RECURSION because of
1668 a missing RECURSIVE declaration. This means that either sym is the current
1669 context itself, or sym is the parent of a contained procedure calling its
1670 non-RECURSIVE containing procedure.
1671 This also works if sym is an ENTRY. */
1674 is_illegal_recursion (gfc_symbol
* sym
, gfc_namespace
* context
)
1676 gfc_symbol
* proc_sym
;
1677 gfc_symbol
* context_proc
;
1678 gfc_namespace
* real_context
;
1680 if (sym
->attr
.flavor
== FL_PROGRAM
1681 || gfc_fl_struct (sym
->attr
.flavor
))
1684 gcc_assert (sym
->attr
.flavor
== FL_PROCEDURE
);
1686 /* If we've got an ENTRY, find real procedure. */
1687 if (sym
->attr
.entry
&& sym
->ns
->entries
)
1688 proc_sym
= sym
->ns
->entries
->sym
;
1692 /* If sym is RECURSIVE, all is well of course. */
1693 if (proc_sym
->attr
.recursive
|| flag_recursive
)
1696 /* Find the context procedure's "real" symbol if it has entries.
1697 We look for a procedure symbol, so recurse on the parents if we don't
1698 find one (like in case of a BLOCK construct). */
1699 for (real_context
= context
; ; real_context
= real_context
->parent
)
1701 /* We should find something, eventually! */
1702 gcc_assert (real_context
);
1704 context_proc
= (real_context
->entries
? real_context
->entries
->sym
1705 : real_context
->proc_name
);
1707 /* In some special cases, there may not be a proc_name, like for this
1709 real(bad_kind()) function foo () ...
1710 when checking the call to bad_kind ().
1711 In these cases, we simply return here and assume that the
1716 if (context_proc
->attr
.flavor
!= FL_LABEL
)
1720 /* A call from sym's body to itself is recursion, of course. */
1721 if (context_proc
== proc_sym
)
1724 /* The same is true if context is a contained procedure and sym the
1726 if (context_proc
->attr
.contained
)
1728 gfc_symbol
* parent_proc
;
1730 gcc_assert (context
->parent
);
1731 parent_proc
= (context
->parent
->entries
? context
->parent
->entries
->sym
1732 : context
->parent
->proc_name
);
1734 if (parent_proc
== proc_sym
)
1742 /* Resolve an intrinsic procedure: Set its function/subroutine attribute,
1743 its typespec and formal argument list. */
1746 gfc_resolve_intrinsic (gfc_symbol
*sym
, locus
*loc
)
1748 gfc_intrinsic_sym
* isym
= NULL
;
1754 /* Already resolved. */
1755 if (sym
->from_intmod
&& sym
->ts
.type
!= BT_UNKNOWN
)
1758 /* We already know this one is an intrinsic, so we don't call
1759 gfc_is_intrinsic for full checking but rather use gfc_find_function and
1760 gfc_find_subroutine directly to check whether it is a function or
1763 if (sym
->intmod_sym_id
&& sym
->attr
.subroutine
)
1765 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1766 isym
= gfc_intrinsic_subroutine_by_id (id
);
1768 else if (sym
->intmod_sym_id
)
1770 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1771 isym
= gfc_intrinsic_function_by_id (id
);
1773 else if (!sym
->attr
.subroutine
)
1774 isym
= gfc_find_function (sym
->name
);
1776 if (isym
&& !sym
->attr
.subroutine
)
1778 if (sym
->ts
.type
!= BT_UNKNOWN
&& warn_surprising
1779 && !sym
->attr
.implicit_type
)
1780 gfc_warning (OPT_Wsurprising
,
1781 "Type specified for intrinsic function %qs at %L is"
1782 " ignored", sym
->name
, &sym
->declared_at
);
1784 if (!sym
->attr
.function
&&
1785 !gfc_add_function(&sym
->attr
, sym
->name
, loc
))
1790 else if (isym
|| (isym
= gfc_find_subroutine (sym
->name
)))
1792 if (sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.implicit_type
)
1794 gfc_error ("Intrinsic subroutine %qs at %L shall not have a type"
1795 " specifier", sym
->name
, &sym
->declared_at
);
1799 if (!sym
->attr
.subroutine
&&
1800 !gfc_add_subroutine(&sym
->attr
, sym
->name
, loc
))
1805 gfc_error ("%qs declared INTRINSIC at %L does not exist", sym
->name
,
1810 gfc_copy_formal_args_intr (sym
, isym
, NULL
);
1812 sym
->attr
.pure
= isym
->pure
;
1813 sym
->attr
.elemental
= isym
->elemental
;
1815 /* Check it is actually available in the standard settings. */
1816 if (!gfc_check_intrinsic_standard (isym
, &symstd
, false, sym
->declared_at
))
1818 gfc_error ("The intrinsic %qs declared INTRINSIC at %L is not "
1819 "available in the current standard settings but %s. Use "
1820 "an appropriate %<-std=*%> option or enable "
1821 "%<-fall-intrinsics%> in order to use it.",
1822 sym
->name
, &sym
->declared_at
, symstd
);
1830 /* Resolve a procedure expression, like passing it to a called procedure or as
1831 RHS for a procedure pointer assignment. */
1834 resolve_procedure_expression (gfc_expr
* expr
)
1838 if (expr
->expr_type
!= EXPR_VARIABLE
)
1840 gcc_assert (expr
->symtree
);
1842 sym
= expr
->symtree
->n
.sym
;
1844 if (sym
->attr
.intrinsic
)
1845 gfc_resolve_intrinsic (sym
, &expr
->where
);
1847 if (sym
->attr
.flavor
!= FL_PROCEDURE
1848 || (sym
->attr
.function
&& sym
->result
== sym
))
1851 /* A non-RECURSIVE procedure that is used as procedure expression within its
1852 own body is in danger of being called recursively. */
1853 if (is_illegal_recursion (sym
, gfc_current_ns
))
1854 gfc_warning (0, "Non-RECURSIVE procedure %qs at %L is possibly calling"
1855 " itself recursively. Declare it RECURSIVE or use"
1856 " %<-frecursive%>", sym
->name
, &expr
->where
);
1862 /* Resolve an actual argument list. Most of the time, this is just
1863 resolving the expressions in the list.
1864 The exception is that we sometimes have to decide whether arguments
1865 that look like procedure arguments are really simple variable
1869 resolve_actual_arglist (gfc_actual_arglist
*arg
, procedure_type ptype
,
1870 bool no_formal_args
)
1873 gfc_symtree
*parent_st
;
1875 gfc_component
*comp
;
1876 int save_need_full_assumed_size
;
1877 bool return_value
= false;
1878 bool actual_arg_sav
= actual_arg
, first_actual_arg_sav
= first_actual_arg
;
1881 first_actual_arg
= true;
1883 for (; arg
; arg
= arg
->next
)
1888 /* Check the label is a valid branching target. */
1891 if (arg
->label
->defined
== ST_LABEL_UNKNOWN
)
1893 gfc_error ("Label %d referenced at %L is never defined",
1894 arg
->label
->value
, &arg
->label
->where
);
1898 first_actual_arg
= false;
1902 if (e
->expr_type
== EXPR_VARIABLE
1903 && e
->symtree
->n
.sym
->attr
.generic
1905 && count_specific_procs (e
) != 1)
1908 if (e
->ts
.type
!= BT_PROCEDURE
)
1910 save_need_full_assumed_size
= need_full_assumed_size
;
1911 if (e
->expr_type
!= EXPR_VARIABLE
)
1912 need_full_assumed_size
= 0;
1913 if (!gfc_resolve_expr (e
))
1915 need_full_assumed_size
= save_need_full_assumed_size
;
1919 /* See if the expression node should really be a variable reference. */
1921 sym
= e
->symtree
->n
.sym
;
1923 if (sym
->attr
.flavor
== FL_PROCEDURE
1924 || sym
->attr
.intrinsic
1925 || sym
->attr
.external
)
1929 /* If a procedure is not already determined to be something else
1930 check if it is intrinsic. */
1931 if (gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, e
->where
))
1932 sym
->attr
.intrinsic
= 1;
1934 if (sym
->attr
.proc
== PROC_ST_FUNCTION
)
1936 gfc_error ("Statement function %qs at %L is not allowed as an "
1937 "actual argument", sym
->name
, &e
->where
);
1940 actual_ok
= gfc_intrinsic_actual_ok (sym
->name
,
1941 sym
->attr
.subroutine
);
1942 if (sym
->attr
.intrinsic
&& actual_ok
== 0)
1944 gfc_error ("Intrinsic %qs at %L is not allowed as an "
1945 "actual argument", sym
->name
, &e
->where
);
1948 if (sym
->attr
.contained
&& !sym
->attr
.use_assoc
1949 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
1951 if (!gfc_notify_std (GFC_STD_F2008
, "Internal procedure %qs is"
1952 " used as actual argument at %L",
1953 sym
->name
, &e
->where
))
1957 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
)
1959 gfc_error ("ELEMENTAL non-INTRINSIC procedure %qs is not "
1960 "allowed as an actual argument at %L", sym
->name
,
1964 /* Check if a generic interface has a specific procedure
1965 with the same name before emitting an error. */
1966 if (sym
->attr
.generic
&& count_specific_procs (e
) != 1)
1969 /* Just in case a specific was found for the expression. */
1970 sym
= e
->symtree
->n
.sym
;
1972 /* If the symbol is the function that names the current (or
1973 parent) scope, then we really have a variable reference. */
1975 if (gfc_is_function_return_value (sym
, sym
->ns
))
1978 /* If all else fails, see if we have a specific intrinsic. */
1979 if (sym
->ts
.type
== BT_UNKNOWN
&& sym
->attr
.intrinsic
)
1981 gfc_intrinsic_sym
*isym
;
1983 isym
= gfc_find_function (sym
->name
);
1984 if (isym
== NULL
|| !isym
->specific
)
1986 gfc_error ("Unable to find a specific INTRINSIC procedure "
1987 "for the reference %qs at %L", sym
->name
,
1992 sym
->attr
.intrinsic
= 1;
1993 sym
->attr
.function
= 1;
1996 if (!gfc_resolve_expr (e
))
2001 /* See if the name is a module procedure in a parent unit. */
2003 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
2006 if (gfc_find_sym_tree (sym
->name
, sym
->ns
->parent
, 1, &parent_st
))
2008 gfc_error ("Symbol %qs at %L is ambiguous", sym
->name
, &e
->where
);
2012 if (parent_st
== NULL
)
2015 sym
= parent_st
->n
.sym
;
2016 e
->symtree
= parent_st
; /* Point to the right thing. */
2018 if (sym
->attr
.flavor
== FL_PROCEDURE
2019 || sym
->attr
.intrinsic
2020 || sym
->attr
.external
)
2022 if (!gfc_resolve_expr (e
))
2028 e
->expr_type
= EXPR_VARIABLE
;
2030 if ((sym
->as
!= NULL
&& sym
->ts
.type
!= BT_CLASS
)
2031 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
2032 && CLASS_DATA (sym
)->as
))
2034 e
->rank
= sym
->ts
.type
== BT_CLASS
2035 ? CLASS_DATA (sym
)->as
->rank
: sym
->as
->rank
;
2036 e
->ref
= gfc_get_ref ();
2037 e
->ref
->type
= REF_ARRAY
;
2038 e
->ref
->u
.ar
.type
= AR_FULL
;
2039 e
->ref
->u
.ar
.as
= sym
->ts
.type
== BT_CLASS
2040 ? CLASS_DATA (sym
)->as
: sym
->as
;
2043 /* Expressions are assigned a default ts.type of BT_PROCEDURE in
2044 primary.c (match_actual_arg). If above code determines that it
2045 is a variable instead, it needs to be resolved as it was not
2046 done at the beginning of this function. */
2047 save_need_full_assumed_size
= need_full_assumed_size
;
2048 if (e
->expr_type
!= EXPR_VARIABLE
)
2049 need_full_assumed_size
= 0;
2050 if (!gfc_resolve_expr (e
))
2052 need_full_assumed_size
= save_need_full_assumed_size
;
2055 /* Check argument list functions %VAL, %LOC and %REF. There is
2056 nothing to do for %REF. */
2057 if (arg
->name
&& arg
->name
[0] == '%')
2059 if (strncmp ("%VAL", arg
->name
, 4) == 0)
2061 if (e
->ts
.type
== BT_CHARACTER
|| e
->ts
.type
== BT_DERIVED
)
2063 gfc_error ("By-value argument at %L is not of numeric "
2070 gfc_error ("By-value argument at %L cannot be an array or "
2071 "an array section", &e
->where
);
2075 /* Intrinsics are still PROC_UNKNOWN here. However,
2076 since same file external procedures are not resolvable
2077 in gfortran, it is a good deal easier to leave them to
2079 if (ptype
!= PROC_UNKNOWN
2080 && ptype
!= PROC_DUMMY
2081 && ptype
!= PROC_EXTERNAL
2082 && ptype
!= PROC_MODULE
)
2084 gfc_error ("By-value argument at %L is not allowed "
2085 "in this context", &e
->where
);
2090 /* Statement functions have already been excluded above. */
2091 else if (strncmp ("%LOC", arg
->name
, 4) == 0
2092 && e
->ts
.type
== BT_PROCEDURE
)
2094 if (e
->symtree
->n
.sym
->attr
.proc
== PROC_INTERNAL
)
2096 gfc_error ("Passing internal procedure at %L by location "
2097 "not allowed", &e
->where
);
2103 comp
= gfc_get_proc_ptr_comp(e
);
2104 if (e
->expr_type
== EXPR_VARIABLE
2105 && comp
&& comp
->attr
.elemental
)
2107 gfc_error ("ELEMENTAL procedure pointer component %qs is not "
2108 "allowed as an actual argument at %L", comp
->name
,
2112 /* Fortran 2008, C1237. */
2113 if (e
->expr_type
== EXPR_VARIABLE
&& gfc_is_coindexed (e
)
2114 && gfc_has_ultimate_pointer (e
))
2116 gfc_error ("Coindexed actual argument at %L with ultimate pointer "
2117 "component", &e
->where
);
2121 first_actual_arg
= false;
2124 return_value
= true;
2127 actual_arg
= actual_arg_sav
;
2128 first_actual_arg
= first_actual_arg_sav
;
2130 return return_value
;
2134 /* Do the checks of the actual argument list that are specific to elemental
2135 procedures. If called with c == NULL, we have a function, otherwise if
2136 expr == NULL, we have a subroutine. */
2139 resolve_elemental_actual (gfc_expr
*expr
, gfc_code
*c
)
2141 gfc_actual_arglist
*arg0
;
2142 gfc_actual_arglist
*arg
;
2143 gfc_symbol
*esym
= NULL
;
2144 gfc_intrinsic_sym
*isym
= NULL
;
2146 gfc_intrinsic_arg
*iformal
= NULL
;
2147 gfc_formal_arglist
*eformal
= NULL
;
2148 bool formal_optional
= false;
2149 bool set_by_optional
= false;
2153 /* Is this an elemental procedure? */
2154 if (expr
&& expr
->value
.function
.actual
!= NULL
)
2156 if (expr
->value
.function
.esym
!= NULL
2157 && expr
->value
.function
.esym
->attr
.elemental
)
2159 arg0
= expr
->value
.function
.actual
;
2160 esym
= expr
->value
.function
.esym
;
2162 else if (expr
->value
.function
.isym
!= NULL
2163 && expr
->value
.function
.isym
->elemental
)
2165 arg0
= expr
->value
.function
.actual
;
2166 isym
= expr
->value
.function
.isym
;
2171 else if (c
&& c
->ext
.actual
!= NULL
)
2173 arg0
= c
->ext
.actual
;
2175 if (c
->resolved_sym
)
2176 esym
= c
->resolved_sym
;
2178 esym
= c
->symtree
->n
.sym
;
2181 if (!esym
->attr
.elemental
)
2187 /* The rank of an elemental is the rank of its array argument(s). */
2188 for (arg
= arg0
; arg
; arg
= arg
->next
)
2190 if (arg
->expr
!= NULL
&& arg
->expr
->rank
!= 0)
2192 rank
= arg
->expr
->rank
;
2193 if (arg
->expr
->expr_type
== EXPR_VARIABLE
2194 && arg
->expr
->symtree
->n
.sym
->attr
.optional
)
2195 set_by_optional
= true;
2197 /* Function specific; set the result rank and shape. */
2201 if (!expr
->shape
&& arg
->expr
->shape
)
2203 expr
->shape
= gfc_get_shape (rank
);
2204 for (i
= 0; i
< rank
; i
++)
2205 mpz_init_set (expr
->shape
[i
], arg
->expr
->shape
[i
]);
2212 /* If it is an array, it shall not be supplied as an actual argument
2213 to an elemental procedure unless an array of the same rank is supplied
2214 as an actual argument corresponding to a nonoptional dummy argument of
2215 that elemental procedure(12.4.1.5). */
2216 formal_optional
= false;
2218 iformal
= isym
->formal
;
2220 eformal
= esym
->formal
;
2222 for (arg
= arg0
; arg
; arg
= arg
->next
)
2226 if (eformal
->sym
&& eformal
->sym
->attr
.optional
)
2227 formal_optional
= true;
2228 eformal
= eformal
->next
;
2230 else if (isym
&& iformal
)
2232 if (iformal
->optional
)
2233 formal_optional
= true;
2234 iformal
= iformal
->next
;
2237 formal_optional
= true;
2239 if (pedantic
&& arg
->expr
!= NULL
2240 && arg
->expr
->expr_type
== EXPR_VARIABLE
2241 && arg
->expr
->symtree
->n
.sym
->attr
.optional
2244 && (set_by_optional
|| arg
->expr
->rank
!= rank
)
2245 && !(isym
&& isym
->id
== GFC_ISYM_CONVERSION
))
2247 gfc_warning (OPT_Wpedantic
,
2248 "%qs at %L is an array and OPTIONAL; IF IT IS "
2249 "MISSING, it cannot be the actual argument of an "
2250 "ELEMENTAL procedure unless there is a non-optional "
2251 "argument with the same rank (12.4.1.5)",
2252 arg
->expr
->symtree
->n
.sym
->name
, &arg
->expr
->where
);
2256 for (arg
= arg0
; arg
; arg
= arg
->next
)
2258 if (arg
->expr
== NULL
|| arg
->expr
->rank
== 0)
2261 /* Being elemental, the last upper bound of an assumed size array
2262 argument must be present. */
2263 if (resolve_assumed_size_actual (arg
->expr
))
2266 /* Elemental procedure's array actual arguments must conform. */
2269 if (!gfc_check_conformance (arg
->expr
, e
, "elemental procedure"))
2276 /* INTENT(OUT) is only allowed for subroutines; if any actual argument
2277 is an array, the intent inout/out variable needs to be also an array. */
2278 if (rank
> 0 && esym
&& expr
== NULL
)
2279 for (eformal
= esym
->formal
, arg
= arg0
; arg
&& eformal
;
2280 arg
= arg
->next
, eformal
= eformal
->next
)
2281 if ((eformal
->sym
->attr
.intent
== INTENT_OUT
2282 || eformal
->sym
->attr
.intent
== INTENT_INOUT
)
2283 && arg
->expr
&& arg
->expr
->rank
== 0)
2285 gfc_error ("Actual argument at %L for INTENT(%s) dummy %qs of "
2286 "ELEMENTAL subroutine %qs is a scalar, but another "
2287 "actual argument is an array", &arg
->expr
->where
,
2288 (eformal
->sym
->attr
.intent
== INTENT_OUT
) ? "OUT"
2289 : "INOUT", eformal
->sym
->name
, esym
->name
);
2296 /* This function does the checking of references to global procedures
2297 as defined in sections 18.1 and 14.1, respectively, of the Fortran
2298 77 and 95 standards. It checks for a gsymbol for the name, making
2299 one if it does not already exist. If it already exists, then the
2300 reference being resolved must correspond to the type of gsymbol.
2301 Otherwise, the new symbol is equipped with the attributes of the
2302 reference. The corresponding code that is called in creating
2303 global entities is parse.c.
2305 In addition, for all but -std=legacy, the gsymbols are used to
2306 check the interfaces of external procedures from the same file.
2307 The namespace of the gsymbol is resolved and then, once this is
2308 done the interface is checked. */
2312 not_in_recursive (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2314 if (!gsym_ns
->proc_name
->attr
.recursive
)
2317 if (sym
->ns
== gsym_ns
)
2320 if (sym
->ns
->parent
&& sym
->ns
->parent
== gsym_ns
)
2327 not_entry_self_reference (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2329 if (gsym_ns
->entries
)
2331 gfc_entry_list
*entry
= gsym_ns
->entries
;
2333 for (; entry
; entry
= entry
->next
)
2335 if (strcmp (sym
->name
, entry
->sym
->name
) == 0)
2337 if (strcmp (gsym_ns
->proc_name
->name
,
2338 sym
->ns
->proc_name
->name
) == 0)
2342 && strcmp (gsym_ns
->proc_name
->name
,
2343 sym
->ns
->parent
->proc_name
->name
) == 0)
2352 /* Check for the requirement of an explicit interface. F08:12.4.2.2. */
2355 gfc_explicit_interface_required (gfc_symbol
*sym
, char *errmsg
, int err_len
)
2357 gfc_formal_arglist
*arg
= gfc_sym_get_dummy_args (sym
);
2359 for ( ; arg
; arg
= arg
->next
)
2364 if (arg
->sym
->attr
.allocatable
) /* (2a) */
2366 strncpy (errmsg
, _("allocatable argument"), err_len
);
2369 else if (arg
->sym
->attr
.asynchronous
)
2371 strncpy (errmsg
, _("asynchronous argument"), err_len
);
2374 else if (arg
->sym
->attr
.optional
)
2376 strncpy (errmsg
, _("optional argument"), err_len
);
2379 else if (arg
->sym
->attr
.pointer
)
2381 strncpy (errmsg
, _("pointer argument"), err_len
);
2384 else if (arg
->sym
->attr
.target
)
2386 strncpy (errmsg
, _("target argument"), err_len
);
2389 else if (arg
->sym
->attr
.value
)
2391 strncpy (errmsg
, _("value argument"), err_len
);
2394 else if (arg
->sym
->attr
.volatile_
)
2396 strncpy (errmsg
, _("volatile argument"), err_len
);
2399 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_SHAPE
) /* (2b) */
2401 strncpy (errmsg
, _("assumed-shape argument"), err_len
);
2404 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_RANK
) /* TS 29113, 6.2. */
2406 strncpy (errmsg
, _("assumed-rank argument"), err_len
);
2409 else if (arg
->sym
->attr
.codimension
) /* (2c) */
2411 strncpy (errmsg
, _("coarray argument"), err_len
);
2414 else if (false) /* (2d) TODO: parametrized derived type */
2416 strncpy (errmsg
, _("parametrized derived type argument"), err_len
);
2419 else if (arg
->sym
->ts
.type
== BT_CLASS
) /* (2e) */
2421 strncpy (errmsg
, _("polymorphic argument"), err_len
);
2424 else if (arg
->sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
2426 strncpy (errmsg
, _("NO_ARG_CHECK attribute"), err_len
);
2429 else if (arg
->sym
->ts
.type
== BT_ASSUMED
)
2431 /* As assumed-type is unlimited polymorphic (cf. above).
2432 See also TS 29113, Note 6.1. */
2433 strncpy (errmsg
, _("assumed-type argument"), err_len
);
2438 if (sym
->attr
.function
)
2440 gfc_symbol
*res
= sym
->result
? sym
->result
: sym
;
2442 if (res
->attr
.dimension
) /* (3a) */
2444 strncpy (errmsg
, _("array result"), err_len
);
2447 else if (res
->attr
.pointer
|| res
->attr
.allocatable
) /* (3b) */
2449 strncpy (errmsg
, _("pointer or allocatable result"), err_len
);
2452 else if (res
->ts
.type
== BT_CHARACTER
&& res
->ts
.u
.cl
2453 && res
->ts
.u
.cl
->length
2454 && res
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
) /* (3c) */
2456 strncpy (errmsg
, _("result with non-constant character length"), err_len
);
2461 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
) /* (4) */
2463 strncpy (errmsg
, _("elemental procedure"), err_len
);
2466 else if (sym
->attr
.is_bind_c
) /* (5) */
2468 strncpy (errmsg
, _("bind(c) procedure"), err_len
);
2477 resolve_global_procedure (gfc_symbol
*sym
, locus
*where
,
2478 gfc_actual_arglist
**actual
, int sub
)
2482 enum gfc_symbol_type type
;
2485 type
= sub
? GSYM_SUBROUTINE
: GSYM_FUNCTION
;
2487 gsym
= gfc_get_gsymbol (sym
->binding_label
? sym
->binding_label
: sym
->name
);
2489 if ((gsym
->type
!= GSYM_UNKNOWN
&& gsym
->type
!= type
))
2490 gfc_global_used (gsym
, where
);
2492 if ((sym
->attr
.if_source
== IFSRC_UNKNOWN
2493 || sym
->attr
.if_source
== IFSRC_IFBODY
)
2494 && gsym
->type
!= GSYM_UNKNOWN
2495 && !gsym
->binding_label
2497 && gsym
->ns
->resolved
!= -1
2498 && gsym
->ns
->proc_name
2499 && not_in_recursive (sym
, gsym
->ns
)
2500 && not_entry_self_reference (sym
, gsym
->ns
))
2502 gfc_symbol
*def_sym
;
2504 /* Resolve the gsymbol namespace if needed. */
2505 if (!gsym
->ns
->resolved
)
2507 gfc_dt_list
*old_dt_list
;
2509 /* Stash away derived types so that the backend_decls do not
2511 old_dt_list
= gfc_derived_types
;
2512 gfc_derived_types
= NULL
;
2514 gfc_resolve (gsym
->ns
);
2516 /* Store the new derived types with the global namespace. */
2517 if (gfc_derived_types
)
2518 gsym
->ns
->derived_types
= gfc_derived_types
;
2520 /* Restore the derived types of this namespace. */
2521 gfc_derived_types
= old_dt_list
;
2524 /* Make sure that translation for the gsymbol occurs before
2525 the procedure currently being resolved. */
2526 ns
= gfc_global_ns_list
;
2527 for (; ns
&& ns
!= gsym
->ns
; ns
= ns
->sibling
)
2529 if (ns
->sibling
== gsym
->ns
)
2531 ns
->sibling
= gsym
->ns
->sibling
;
2532 gsym
->ns
->sibling
= gfc_global_ns_list
;
2533 gfc_global_ns_list
= gsym
->ns
;
2538 def_sym
= gsym
->ns
->proc_name
;
2540 /* This can happen if a binding name has been specified. */
2541 if (gsym
->binding_label
&& gsym
->sym_name
!= def_sym
->name
)
2542 gfc_find_symbol (gsym
->sym_name
, gsym
->ns
, 0, &def_sym
);
2544 if (def_sym
->attr
.entry_master
)
2546 gfc_entry_list
*entry
;
2547 for (entry
= gsym
->ns
->entries
; entry
; entry
= entry
->next
)
2548 if (strcmp (entry
->sym
->name
, sym
->name
) == 0)
2550 def_sym
= entry
->sym
;
2555 if (sym
->attr
.function
&& !gfc_compare_types (&sym
->ts
, &def_sym
->ts
))
2557 gfc_error ("Return type mismatch of function %qs at %L (%s/%s)",
2558 sym
->name
, &sym
->declared_at
, gfc_typename (&sym
->ts
),
2559 gfc_typename (&def_sym
->ts
));
2563 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
2564 && gfc_explicit_interface_required (def_sym
, reason
, sizeof(reason
)))
2566 gfc_error ("Explicit interface required for %qs at %L: %s",
2567 sym
->name
, &sym
->declared_at
, reason
);
2571 if (!pedantic
&& (gfc_option
.allow_std
& GFC_STD_GNU
))
2572 /* Turn erros into warnings with -std=gnu and -std=legacy. */
2573 gfc_errors_to_warnings (true);
2575 if (!gfc_compare_interfaces (sym
, def_sym
, sym
->name
, 0, 1,
2576 reason
, sizeof(reason
), NULL
, NULL
))
2578 gfc_error_opt (OPT_Wargument_mismatch
,
2579 "Interface mismatch in global procedure %qs at %L:"
2580 " %s", sym
->name
, &sym
->declared_at
, reason
);
2585 || ((gfc_option
.warn_std
& GFC_STD_LEGACY
)
2586 && !(gfc_option
.warn_std
& GFC_STD_GNU
)))
2587 gfc_errors_to_warnings (true);
2589 if (sym
->attr
.if_source
!= IFSRC_IFBODY
)
2590 gfc_procedure_use (def_sym
, actual
, where
);
2594 gfc_errors_to_warnings (false);
2596 if (gsym
->type
== GSYM_UNKNOWN
)
2599 gsym
->where
= *where
;
2606 /************* Function resolution *************/
2608 /* Resolve a function call known to be generic.
2609 Section 14.1.2.4.1. */
2612 resolve_generic_f0 (gfc_expr
*expr
, gfc_symbol
*sym
)
2616 if (sym
->attr
.generic
)
2618 s
= gfc_search_interface (sym
->generic
, 0, &expr
->value
.function
.actual
);
2621 expr
->value
.function
.name
= s
->name
;
2622 expr
->value
.function
.esym
= s
;
2624 if (s
->ts
.type
!= BT_UNKNOWN
)
2626 else if (s
->result
!= NULL
&& s
->result
->ts
.type
!= BT_UNKNOWN
)
2627 expr
->ts
= s
->result
->ts
;
2630 expr
->rank
= s
->as
->rank
;
2631 else if (s
->result
!= NULL
&& s
->result
->as
!= NULL
)
2632 expr
->rank
= s
->result
->as
->rank
;
2634 gfc_set_sym_referenced (expr
->value
.function
.esym
);
2639 /* TODO: Need to search for elemental references in generic
2643 if (sym
->attr
.intrinsic
)
2644 return gfc_intrinsic_func_interface (expr
, 0);
2651 resolve_generic_f (gfc_expr
*expr
)
2655 gfc_interface
*intr
= NULL
;
2657 sym
= expr
->symtree
->n
.sym
;
2661 m
= resolve_generic_f0 (expr
, sym
);
2664 else if (m
== MATCH_ERROR
)
2669 for (intr
= sym
->generic
; intr
; intr
= intr
->next
)
2670 if (gfc_fl_struct (intr
->sym
->attr
.flavor
))
2673 if (sym
->ns
->parent
== NULL
)
2675 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2679 if (!generic_sym (sym
))
2683 /* Last ditch attempt. See if the reference is to an intrinsic
2684 that possesses a matching interface. 14.1.2.4 */
2685 if (sym
&& !intr
&& !gfc_is_intrinsic (sym
, 0, expr
->where
))
2687 if (gfc_init_expr_flag
)
2688 gfc_error ("Function %qs in initialization expression at %L "
2689 "must be an intrinsic function",
2690 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2692 gfc_error ("There is no specific function for the generic %qs "
2693 "at %L", expr
->symtree
->n
.sym
->name
, &expr
->where
);
2699 if (!gfc_convert_to_structure_constructor (expr
, intr
->sym
, NULL
,
2702 if (!gfc_use_derived (expr
->ts
.u
.derived
))
2704 return resolve_structure_cons (expr
, 0);
2707 m
= gfc_intrinsic_func_interface (expr
, 0);
2712 gfc_error ("Generic function %qs at %L is not consistent with a "
2713 "specific intrinsic interface", expr
->symtree
->n
.sym
->name
,
2720 /* Resolve a function call known to be specific. */
2723 resolve_specific_f0 (gfc_symbol
*sym
, gfc_expr
*expr
)
2727 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
2729 if (sym
->attr
.dummy
)
2731 sym
->attr
.proc
= PROC_DUMMY
;
2735 sym
->attr
.proc
= PROC_EXTERNAL
;
2739 if (sym
->attr
.proc
== PROC_MODULE
2740 || sym
->attr
.proc
== PROC_ST_FUNCTION
2741 || sym
->attr
.proc
== PROC_INTERNAL
)
2744 if (sym
->attr
.intrinsic
)
2746 m
= gfc_intrinsic_func_interface (expr
, 1);
2750 gfc_error ("Function %qs at %L is INTRINSIC but is not compatible "
2751 "with an intrinsic", sym
->name
, &expr
->where
);
2759 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2762 expr
->ts
= sym
->result
->ts
;
2765 expr
->value
.function
.name
= sym
->name
;
2766 expr
->value
.function
.esym
= sym
;
2767 /* Prevent crash when sym->ts.u.derived->components is not set due to previous
2769 if (sym
->ts
.type
== BT_CLASS
&& !CLASS_DATA (sym
))
2771 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)
2772 expr
->rank
= CLASS_DATA (sym
)->as
->rank
;
2773 else if (sym
->as
!= NULL
)
2774 expr
->rank
= sym
->as
->rank
;
2781 resolve_specific_f (gfc_expr
*expr
)
2786 sym
= expr
->symtree
->n
.sym
;
2790 m
= resolve_specific_f0 (sym
, expr
);
2793 if (m
== MATCH_ERROR
)
2796 if (sym
->ns
->parent
== NULL
)
2799 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2805 gfc_error ("Unable to resolve the specific function %qs at %L",
2806 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2811 /* Recursively append candidate SYM to CANDIDATES. Store the number of
2812 candidates in CANDIDATES_LEN. */
2815 lookup_function_fuzzy_find_candidates (gfc_symtree
*sym
,
2817 size_t &candidates_len
)
2823 if ((sym
->n
.sym
->ts
.type
!= BT_UNKNOWN
|| sym
->n
.sym
->attr
.external
)
2824 && sym
->n
.sym
->attr
.flavor
== FL_PROCEDURE
)
2825 vec_push (candidates
, candidates_len
, sym
->name
);
2829 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2833 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2837 /* Lookup function FN fuzzily, taking names in SYMROOT into account. */
2840 gfc_lookup_function_fuzzy (const char *fn
, gfc_symtree
*symroot
)
2842 char **candidates
= NULL
;
2843 size_t candidates_len
= 0;
2844 lookup_function_fuzzy_find_candidates (symroot
, candidates
, candidates_len
);
2845 return gfc_closest_fuzzy_match (fn
, candidates
);
2849 /* Resolve a procedure call not known to be generic nor specific. */
2852 resolve_unknown_f (gfc_expr
*expr
)
2857 sym
= expr
->symtree
->n
.sym
;
2859 if (sym
->attr
.dummy
)
2861 sym
->attr
.proc
= PROC_DUMMY
;
2862 expr
->value
.function
.name
= sym
->name
;
2866 /* See if we have an intrinsic function reference. */
2868 if (gfc_is_intrinsic (sym
, 0, expr
->where
))
2870 if (gfc_intrinsic_func_interface (expr
, 1) == MATCH_YES
)
2875 /* The reference is to an external name. */
2877 sym
->attr
.proc
= PROC_EXTERNAL
;
2878 expr
->value
.function
.name
= sym
->name
;
2879 expr
->value
.function
.esym
= expr
->symtree
->n
.sym
;
2881 if (sym
->as
!= NULL
)
2882 expr
->rank
= sym
->as
->rank
;
2884 /* Type of the expression is either the type of the symbol or the
2885 default type of the symbol. */
2888 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2890 if (sym
->ts
.type
!= BT_UNKNOWN
)
2894 ts
= gfc_get_default_type (sym
->name
, sym
->ns
);
2896 if (ts
->type
== BT_UNKNOWN
)
2899 = gfc_lookup_function_fuzzy (sym
->name
, sym
->ns
->sym_root
);
2901 gfc_error ("Function %qs at %L has no IMPLICIT type"
2902 "; did you mean %qs?",
2903 sym
->name
, &expr
->where
, guessed
);
2905 gfc_error ("Function %qs at %L has no IMPLICIT type",
2906 sym
->name
, &expr
->where
);
2917 /* Return true, if the symbol is an external procedure. */
2919 is_external_proc (gfc_symbol
*sym
)
2921 if (!sym
->attr
.dummy
&& !sym
->attr
.contained
2922 && !gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, sym
->declared_at
)
2923 && sym
->attr
.proc
!= PROC_ST_FUNCTION
2924 && !sym
->attr
.proc_pointer
2925 && !sym
->attr
.use_assoc
2933 /* Figure out if a function reference is pure or not. Also set the name
2934 of the function for a potential error message. Return nonzero if the
2935 function is PURE, zero if not. */
2937 pure_stmt_function (gfc_expr
*, gfc_symbol
*);
2940 pure_function (gfc_expr
*e
, const char **name
)
2943 gfc_component
*comp
;
2947 if (e
->symtree
!= NULL
2948 && e
->symtree
->n
.sym
!= NULL
2949 && e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
2950 return pure_stmt_function (e
, e
->symtree
->n
.sym
);
2952 comp
= gfc_get_proc_ptr_comp (e
);
2955 pure
= gfc_pure (comp
->ts
.interface
);
2958 else if (e
->value
.function
.esym
)
2960 pure
= gfc_pure (e
->value
.function
.esym
);
2961 *name
= e
->value
.function
.esym
->name
;
2963 else if (e
->value
.function
.isym
)
2965 pure
= e
->value
.function
.isym
->pure
2966 || e
->value
.function
.isym
->elemental
;
2967 *name
= e
->value
.function
.isym
->name
;
2971 /* Implicit functions are not pure. */
2973 *name
= e
->value
.function
.name
;
2981 impure_stmt_fcn (gfc_expr
*e
, gfc_symbol
*sym
,
2982 int *f ATTRIBUTE_UNUSED
)
2986 /* Don't bother recursing into other statement functions
2987 since they will be checked individually for purity. */
2988 if (e
->expr_type
!= EXPR_FUNCTION
2990 || e
->symtree
->n
.sym
== sym
2991 || e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
2994 return pure_function (e
, &name
) ? false : true;
2999 pure_stmt_function (gfc_expr
*e
, gfc_symbol
*sym
)
3001 return gfc_traverse_expr (e
, sym
, impure_stmt_fcn
, 0) ? 0 : 1;
3005 /* Check if an impure function is allowed in the current context. */
3007 static bool check_pure_function (gfc_expr
*e
)
3009 const char *name
= NULL
;
3010 if (!pure_function (e
, &name
) && name
)
3014 gfc_error ("Reference to impure function %qs at %L inside a "
3015 "FORALL %s", name
, &e
->where
,
3016 forall_flag
== 2 ? "mask" : "block");
3019 else if (gfc_do_concurrent_flag
)
3021 gfc_error ("Reference to impure function %qs at %L inside a "
3022 "DO CONCURRENT %s", name
, &e
->where
,
3023 gfc_do_concurrent_flag
== 2 ? "mask" : "block");
3026 else if (gfc_pure (NULL
))
3028 gfc_error ("Reference to impure function %qs at %L "
3029 "within a PURE procedure", name
, &e
->where
);
3032 gfc_unset_implicit_pure (NULL
);
3038 /* Update current procedure's array_outer_dependency flag, considering
3039 a call to procedure SYM. */
3042 update_current_proc_array_outer_dependency (gfc_symbol
*sym
)
3044 /* Check to see if this is a sibling function that has not yet
3046 gfc_namespace
*sibling
= gfc_current_ns
->sibling
;
3047 for (; sibling
; sibling
= sibling
->sibling
)
3049 if (sibling
->proc_name
== sym
)
3051 gfc_resolve (sibling
);
3056 /* If SYM has references to outer arrays, so has the procedure calling
3057 SYM. If SYM is a procedure pointer, we can assume the worst. */
3058 if (sym
->attr
.array_outer_dependency
3059 || sym
->attr
.proc_pointer
)
3060 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3064 /* Resolve a function call, which means resolving the arguments, then figuring
3065 out which entity the name refers to. */
3068 resolve_function (gfc_expr
*expr
)
3070 gfc_actual_arglist
*arg
;
3074 procedure_type p
= PROC_INTRINSIC
;
3075 bool no_formal_args
;
3079 sym
= expr
->symtree
->n
.sym
;
3081 /* If this is a procedure pointer component, it has already been resolved. */
3082 if (gfc_is_proc_ptr_comp (expr
))
3085 /* Avoid re-resolving the arguments of caf_get, which can lead to inserting
3087 if (sym
&& sym
->attr
.intrinsic
3088 && (sym
->intmod_sym_id
== GFC_ISYM_CAF_GET
3089 || sym
->intmod_sym_id
== GFC_ISYM_CAF_SEND
))
3092 if (sym
&& sym
->attr
.intrinsic
3093 && !gfc_resolve_intrinsic (sym
, &expr
->where
))
3096 if (sym
&& (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.subroutine
))
3098 gfc_error ("%qs at %L is not a function", sym
->name
, &expr
->where
);
3102 /* If this ia a deferred TBP with an abstract interface (which may
3103 of course be referenced), expr->value.function.esym will be set. */
3104 if (sym
&& sym
->attr
.abstract
&& !expr
->value
.function
.esym
)
3106 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3107 sym
->name
, &expr
->where
);
3111 /* Switch off assumed size checking and do this again for certain kinds
3112 of procedure, once the procedure itself is resolved. */
3113 need_full_assumed_size
++;
3115 if (expr
->symtree
&& expr
->symtree
->n
.sym
)
3116 p
= expr
->symtree
->n
.sym
->attr
.proc
;
3118 if (expr
->value
.function
.isym
&& expr
->value
.function
.isym
->inquiry
)
3119 inquiry_argument
= true;
3120 no_formal_args
= sym
&& is_external_proc (sym
)
3121 && gfc_sym_get_dummy_args (sym
) == NULL
;
3123 if (!resolve_actual_arglist (expr
->value
.function
.actual
,
3126 inquiry_argument
= false;
3130 inquiry_argument
= false;
3132 /* Resume assumed_size checking. */
3133 need_full_assumed_size
--;
3135 /* If the procedure is external, check for usage. */
3136 if (sym
&& is_external_proc (sym
))
3137 resolve_global_procedure (sym
, &expr
->where
,
3138 &expr
->value
.function
.actual
, 0);
3140 if (sym
&& sym
->ts
.type
== BT_CHARACTER
3142 && sym
->ts
.u
.cl
->length
== NULL
3144 && !sym
->ts
.deferred
3145 && expr
->value
.function
.esym
== NULL
3146 && !sym
->attr
.contained
)
3148 /* Internal procedures are taken care of in resolve_contained_fntype. */
3149 gfc_error ("Function %qs is declared CHARACTER(*) and cannot "
3150 "be used at %L since it is not a dummy argument",
3151 sym
->name
, &expr
->where
);
3155 /* See if function is already resolved. */
3157 if (expr
->value
.function
.name
!= NULL
3158 || expr
->value
.function
.isym
!= NULL
)
3160 if (expr
->ts
.type
== BT_UNKNOWN
)
3166 /* Apply the rules of section 14.1.2. */
3168 switch (procedure_kind (sym
))
3171 t
= resolve_generic_f (expr
);
3174 case PTYPE_SPECIFIC
:
3175 t
= resolve_specific_f (expr
);
3179 t
= resolve_unknown_f (expr
);
3183 gfc_internal_error ("resolve_function(): bad function type");
3187 /* If the expression is still a function (it might have simplified),
3188 then we check to see if we are calling an elemental function. */
3190 if (expr
->expr_type
!= EXPR_FUNCTION
)
3193 temp
= need_full_assumed_size
;
3194 need_full_assumed_size
= 0;
3196 if (!resolve_elemental_actual (expr
, NULL
))
3199 if (omp_workshare_flag
3200 && expr
->value
.function
.esym
3201 && ! gfc_elemental (expr
->value
.function
.esym
))
3203 gfc_error ("User defined non-ELEMENTAL function %qs at %L not allowed "
3204 "in WORKSHARE construct", expr
->value
.function
.esym
->name
,
3209 #define GENERIC_ID expr->value.function.isym->id
3210 else if (expr
->value
.function
.actual
!= NULL
3211 && expr
->value
.function
.isym
!= NULL
3212 && GENERIC_ID
!= GFC_ISYM_LBOUND
3213 && GENERIC_ID
!= GFC_ISYM_LCOBOUND
3214 && GENERIC_ID
!= GFC_ISYM_UCOBOUND
3215 && GENERIC_ID
!= GFC_ISYM_LEN
3216 && GENERIC_ID
!= GFC_ISYM_LOC
3217 && GENERIC_ID
!= GFC_ISYM_C_LOC
3218 && GENERIC_ID
!= GFC_ISYM_PRESENT
)
3220 /* Array intrinsics must also have the last upper bound of an
3221 assumed size array argument. UBOUND and SIZE have to be
3222 excluded from the check if the second argument is anything
3225 for (arg
= expr
->value
.function
.actual
; arg
; arg
= arg
->next
)
3227 if ((GENERIC_ID
== GFC_ISYM_UBOUND
|| GENERIC_ID
== GFC_ISYM_SIZE
)
3228 && arg
== expr
->value
.function
.actual
3229 && arg
->next
!= NULL
&& arg
->next
->expr
)
3231 if (arg
->next
->expr
->expr_type
!= EXPR_CONSTANT
)
3234 if (arg
->next
->name
&& strncmp (arg
->next
->name
, "kind", 4) == 0)
3237 if ((int)mpz_get_si (arg
->next
->expr
->value
.integer
)
3242 if (arg
->expr
!= NULL
3243 && arg
->expr
->rank
> 0
3244 && resolve_assumed_size_actual (arg
->expr
))
3250 need_full_assumed_size
= temp
;
3252 if (!check_pure_function(expr
))
3255 /* Functions without the RECURSIVE attribution are not allowed to
3256 * call themselves. */
3257 if (expr
->value
.function
.esym
&& !expr
->value
.function
.esym
->attr
.recursive
)
3260 esym
= expr
->value
.function
.esym
;
3262 if (is_illegal_recursion (esym
, gfc_current_ns
))
3264 if (esym
->attr
.entry
&& esym
->ns
->entries
)
3265 gfc_error ("ENTRY %qs at %L cannot be called recursively, as"
3266 " function %qs is not RECURSIVE",
3267 esym
->name
, &expr
->where
, esym
->ns
->entries
->sym
->name
);
3269 gfc_error ("Function %qs at %L cannot be called recursively, as it"
3270 " is not RECURSIVE", esym
->name
, &expr
->where
);
3276 /* Character lengths of use associated functions may contains references to
3277 symbols not referenced from the current program unit otherwise. Make sure
3278 those symbols are marked as referenced. */
3280 if (expr
->ts
.type
== BT_CHARACTER
&& expr
->value
.function
.esym
3281 && expr
->value
.function
.esym
->attr
.use_assoc
)
3283 gfc_expr_set_symbols_referenced (expr
->ts
.u
.cl
->length
);
3286 /* Make sure that the expression has a typespec that works. */
3287 if (expr
->ts
.type
== BT_UNKNOWN
)
3289 if (expr
->symtree
->n
.sym
->result
3290 && expr
->symtree
->n
.sym
->result
->ts
.type
!= BT_UNKNOWN
3291 && !expr
->symtree
->n
.sym
->result
->attr
.proc_pointer
)
3292 expr
->ts
= expr
->symtree
->n
.sym
->result
->ts
;
3295 if (!expr
->ref
&& !expr
->value
.function
.isym
)
3297 if (expr
->value
.function
.esym
)
3298 update_current_proc_array_outer_dependency (expr
->value
.function
.esym
);
3300 update_current_proc_array_outer_dependency (sym
);
3303 /* typebound procedure: Assume the worst. */
3304 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3310 /************* Subroutine resolution *************/
3313 pure_subroutine (gfc_symbol
*sym
, const char *name
, locus
*loc
)
3320 gfc_error ("Subroutine call to %qs in FORALL block at %L is not PURE",
3324 else if (gfc_do_concurrent_flag
)
3326 gfc_error ("Subroutine call to %qs in DO CONCURRENT block at %L is not "
3330 else if (gfc_pure (NULL
))
3332 gfc_error ("Subroutine call to %qs at %L is not PURE", name
, loc
);
3336 gfc_unset_implicit_pure (NULL
);
3342 resolve_generic_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3346 if (sym
->attr
.generic
)
3348 s
= gfc_search_interface (sym
->generic
, 1, &c
->ext
.actual
);
3351 c
->resolved_sym
= s
;
3352 if (!pure_subroutine (s
, s
->name
, &c
->loc
))
3357 /* TODO: Need to search for elemental references in generic interface. */
3360 if (sym
->attr
.intrinsic
)
3361 return gfc_intrinsic_sub_interface (c
, 0);
3368 resolve_generic_s (gfc_code
*c
)
3373 sym
= c
->symtree
->n
.sym
;
3377 m
= resolve_generic_s0 (c
, sym
);
3380 else if (m
== MATCH_ERROR
)
3384 if (sym
->ns
->parent
== NULL
)
3386 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3390 if (!generic_sym (sym
))
3394 /* Last ditch attempt. See if the reference is to an intrinsic
3395 that possesses a matching interface. 14.1.2.4 */
3396 sym
= c
->symtree
->n
.sym
;
3398 if (!gfc_is_intrinsic (sym
, 1, c
->loc
))
3400 gfc_error ("There is no specific subroutine for the generic %qs at %L",
3401 sym
->name
, &c
->loc
);
3405 m
= gfc_intrinsic_sub_interface (c
, 0);
3409 gfc_error ("Generic subroutine %qs at %L is not consistent with an "
3410 "intrinsic subroutine interface", sym
->name
, &c
->loc
);
3416 /* Resolve a subroutine call known to be specific. */
3419 resolve_specific_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3423 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
3425 if (sym
->attr
.dummy
)
3427 sym
->attr
.proc
= PROC_DUMMY
;
3431 sym
->attr
.proc
= PROC_EXTERNAL
;
3435 if (sym
->attr
.proc
== PROC_MODULE
|| sym
->attr
.proc
== PROC_INTERNAL
)
3438 if (sym
->attr
.intrinsic
)
3440 m
= gfc_intrinsic_sub_interface (c
, 1);
3444 gfc_error ("Subroutine %qs at %L is INTRINSIC but is not compatible "
3445 "with an intrinsic", sym
->name
, &c
->loc
);
3453 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3455 c
->resolved_sym
= sym
;
3456 if (!pure_subroutine (sym
, sym
->name
, &c
->loc
))
3464 resolve_specific_s (gfc_code
*c
)
3469 sym
= c
->symtree
->n
.sym
;
3473 m
= resolve_specific_s0 (c
, sym
);
3476 if (m
== MATCH_ERROR
)
3479 if (sym
->ns
->parent
== NULL
)
3482 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3488 sym
= c
->symtree
->n
.sym
;
3489 gfc_error ("Unable to resolve the specific subroutine %qs at %L",
3490 sym
->name
, &c
->loc
);
3496 /* Resolve a subroutine call not known to be generic nor specific. */
3499 resolve_unknown_s (gfc_code
*c
)
3503 sym
= c
->symtree
->n
.sym
;
3505 if (sym
->attr
.dummy
)
3507 sym
->attr
.proc
= PROC_DUMMY
;
3511 /* See if we have an intrinsic function reference. */
3513 if (gfc_is_intrinsic (sym
, 1, c
->loc
))
3515 if (gfc_intrinsic_sub_interface (c
, 1) == MATCH_YES
)
3520 /* The reference is to an external name. */
3523 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3525 c
->resolved_sym
= sym
;
3527 return pure_subroutine (sym
, sym
->name
, &c
->loc
);
3531 /* Resolve a subroutine call. Although it was tempting to use the same code
3532 for functions, subroutines and functions are stored differently and this
3533 makes things awkward. */
3536 resolve_call (gfc_code
*c
)
3539 procedure_type ptype
= PROC_INTRINSIC
;
3540 gfc_symbol
*csym
, *sym
;
3541 bool no_formal_args
;
3543 csym
= c
->symtree
? c
->symtree
->n
.sym
: NULL
;
3545 if (csym
&& csym
->ts
.type
!= BT_UNKNOWN
)
3547 gfc_error ("%qs at %L has a type, which is not consistent with "
3548 "the CALL at %L", csym
->name
, &csym
->declared_at
, &c
->loc
);
3552 if (csym
&& gfc_current_ns
->parent
&& csym
->ns
!= gfc_current_ns
)
3555 gfc_find_sym_tree (c
->symtree
->name
, gfc_current_ns
, 1, &st
);
3556 sym
= st
? st
->n
.sym
: NULL
;
3557 if (sym
&& csym
!= sym
3558 && sym
->ns
== gfc_current_ns
3559 && sym
->attr
.flavor
== FL_PROCEDURE
3560 && sym
->attr
.contained
)
3563 if (csym
->attr
.generic
)
3564 c
->symtree
->n
.sym
= sym
;
3567 csym
= c
->symtree
->n
.sym
;
3571 /* If this ia a deferred TBP, c->expr1 will be set. */
3572 if (!c
->expr1
&& csym
)
3574 if (csym
->attr
.abstract
)
3576 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3577 csym
->name
, &c
->loc
);
3581 /* Subroutines without the RECURSIVE attribution are not allowed to
3583 if (is_illegal_recursion (csym
, gfc_current_ns
))
3585 if (csym
->attr
.entry
&& csym
->ns
->entries
)
3586 gfc_error ("ENTRY %qs at %L cannot be called recursively, "
3587 "as subroutine %qs is not RECURSIVE",
3588 csym
->name
, &c
->loc
, csym
->ns
->entries
->sym
->name
);
3590 gfc_error ("SUBROUTINE %qs at %L cannot be called recursively, "
3591 "as it is not RECURSIVE", csym
->name
, &c
->loc
);
3597 /* Switch off assumed size checking and do this again for certain kinds
3598 of procedure, once the procedure itself is resolved. */
3599 need_full_assumed_size
++;
3602 ptype
= csym
->attr
.proc
;
3604 no_formal_args
= csym
&& is_external_proc (csym
)
3605 && gfc_sym_get_dummy_args (csym
) == NULL
;
3606 if (!resolve_actual_arglist (c
->ext
.actual
, ptype
, no_formal_args
))
3609 /* Resume assumed_size checking. */
3610 need_full_assumed_size
--;
3612 /* If external, check for usage. */
3613 if (csym
&& is_external_proc (csym
))
3614 resolve_global_procedure (csym
, &c
->loc
, &c
->ext
.actual
, 1);
3617 if (c
->resolved_sym
== NULL
)
3619 c
->resolved_isym
= NULL
;
3620 switch (procedure_kind (csym
))
3623 t
= resolve_generic_s (c
);
3626 case PTYPE_SPECIFIC
:
3627 t
= resolve_specific_s (c
);
3631 t
= resolve_unknown_s (c
);
3635 gfc_internal_error ("resolve_subroutine(): bad function type");
3639 /* Some checks of elemental subroutine actual arguments. */
3640 if (!resolve_elemental_actual (NULL
, c
))
3644 update_current_proc_array_outer_dependency (csym
);
3646 /* Typebound procedure: Assume the worst. */
3647 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3653 /* Compare the shapes of two arrays that have non-NULL shapes. If both
3654 op1->shape and op2->shape are non-NULL return true if their shapes
3655 match. If both op1->shape and op2->shape are non-NULL return false
3656 if their shapes do not match. If either op1->shape or op2->shape is
3657 NULL, return true. */
3660 compare_shapes (gfc_expr
*op1
, gfc_expr
*op2
)
3667 if (op1
->shape
!= NULL
&& op2
->shape
!= NULL
)
3669 for (i
= 0; i
< op1
->rank
; i
++)
3671 if (mpz_cmp (op1
->shape
[i
], op2
->shape
[i
]) != 0)
3673 gfc_error ("Shapes for operands at %L and %L are not conformable",
3674 &op1
->where
, &op2
->where
);
3684 /* Convert a logical operator to the corresponding bitwise intrinsic call.
3685 For example A .AND. B becomes IAND(A, B). */
3687 logical_to_bitwise (gfc_expr
*e
)
3689 gfc_expr
*tmp
, *op1
, *op2
;
3691 gfc_actual_arglist
*args
= NULL
;
3693 gcc_assert (e
->expr_type
== EXPR_OP
);
3695 isym
= GFC_ISYM_NONE
;
3696 op1
= e
->value
.op
.op1
;
3697 op2
= e
->value
.op
.op2
;
3699 switch (e
->value
.op
.op
)
3702 isym
= GFC_ISYM_NOT
;
3705 isym
= GFC_ISYM_IAND
;
3708 isym
= GFC_ISYM_IOR
;
3710 case INTRINSIC_NEQV
:
3711 isym
= GFC_ISYM_IEOR
;
3714 /* "Bitwise eqv" is just the complement of NEQV === IEOR.
3715 Change the old expression to NEQV, which will get replaced by IEOR,
3716 and wrap it in NOT. */
3717 tmp
= gfc_copy_expr (e
);
3718 tmp
->value
.op
.op
= INTRINSIC_NEQV
;
3719 tmp
= logical_to_bitwise (tmp
);
3720 isym
= GFC_ISYM_NOT
;
3725 gfc_internal_error ("logical_to_bitwise(): Bad intrinsic");
3728 /* Inherit the original operation's operands as arguments. */
3729 args
= gfc_get_actual_arglist ();
3733 args
->next
= gfc_get_actual_arglist ();
3734 args
->next
->expr
= op2
;
3737 /* Convert the expression to a function call. */
3738 e
->expr_type
= EXPR_FUNCTION
;
3739 e
->value
.function
.actual
= args
;
3740 e
->value
.function
.isym
= gfc_intrinsic_function_by_id (isym
);
3741 e
->value
.function
.name
= e
->value
.function
.isym
->name
;
3742 e
->value
.function
.esym
= NULL
;
3744 /* Make up a pre-resolved function call symtree if we need to. */
3745 if (!e
->symtree
|| !e
->symtree
->n
.sym
)
3748 gfc_get_ha_sym_tree (e
->value
.function
.isym
->name
, &e
->symtree
);
3749 sym
= e
->symtree
->n
.sym
;
3751 sym
->attr
.flavor
= FL_PROCEDURE
;
3752 sym
->attr
.function
= 1;
3753 sym
->attr
.elemental
= 1;
3755 sym
->attr
.referenced
= 1;
3756 gfc_intrinsic_symbol (sym
);
3757 gfc_commit_symbol (sym
);
3760 args
->name
= e
->value
.function
.isym
->formal
->name
;
3761 if (e
->value
.function
.isym
->formal
->next
)
3762 args
->next
->name
= e
->value
.function
.isym
->formal
->next
->name
;
3767 /* Recursively append candidate UOP to CANDIDATES. Store the number of
3768 candidates in CANDIDATES_LEN. */
3770 lookup_uop_fuzzy_find_candidates (gfc_symtree
*uop
,
3772 size_t &candidates_len
)
3779 /* Not sure how to properly filter here. Use all for a start.
3780 n.uop.op is NULL for empty interface operators (is that legal?) disregard
3781 these as i suppose they don't make terribly sense. */
3783 if (uop
->n
.uop
->op
!= NULL
)
3784 vec_push (candidates
, candidates_len
, uop
->name
);
3788 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3792 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3795 /* Lookup user-operator OP fuzzily, taking names in UOP into account. */
3798 lookup_uop_fuzzy (const char *op
, gfc_symtree
*uop
)
3800 char **candidates
= NULL
;
3801 size_t candidates_len
= 0;
3802 lookup_uop_fuzzy_find_candidates (uop
, candidates
, candidates_len
);
3803 return gfc_closest_fuzzy_match (op
, candidates
);
3807 /* Resolve an operator expression node. This can involve replacing the
3808 operation with a user defined function call. */
3811 resolve_operator (gfc_expr
*e
)
3813 gfc_expr
*op1
, *op2
;
3815 bool dual_locus_error
;
3818 /* Resolve all subnodes-- give them types. */
3820 switch (e
->value
.op
.op
)
3823 if (!gfc_resolve_expr (e
->value
.op
.op2
))
3829 case INTRINSIC_UPLUS
:
3830 case INTRINSIC_UMINUS
:
3831 case INTRINSIC_PARENTHESES
:
3832 if (!gfc_resolve_expr (e
->value
.op
.op1
))
3837 /* Typecheck the new node. */
3839 op1
= e
->value
.op
.op1
;
3840 op2
= e
->value
.op
.op2
;
3841 dual_locus_error
= false;
3843 if ((op1
&& op1
->expr_type
== EXPR_NULL
)
3844 || (op2
&& op2
->expr_type
== EXPR_NULL
))
3846 sprintf (msg
, _("Invalid context for NULL() pointer at %%L"));
3850 switch (e
->value
.op
.op
)
3852 case INTRINSIC_UPLUS
:
3853 case INTRINSIC_UMINUS
:
3854 if (op1
->ts
.type
== BT_INTEGER
3855 || op1
->ts
.type
== BT_REAL
3856 || op1
->ts
.type
== BT_COMPLEX
)
3862 sprintf (msg
, _("Operand of unary numeric operator %%<%s%%> at %%L is %s"),
3863 gfc_op2string (e
->value
.op
.op
), gfc_typename (&e
->ts
));
3866 case INTRINSIC_PLUS
:
3867 case INTRINSIC_MINUS
:
3868 case INTRINSIC_TIMES
:
3869 case INTRINSIC_DIVIDE
:
3870 case INTRINSIC_POWER
:
3871 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
3873 gfc_type_convert_binary (e
, 1);
3878 _("Operands of binary numeric operator %%<%s%%> at %%L are %s/%s"),
3879 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
3880 gfc_typename (&op2
->ts
));
3883 case INTRINSIC_CONCAT
:
3884 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
3885 && op1
->ts
.kind
== op2
->ts
.kind
)
3887 e
->ts
.type
= BT_CHARACTER
;
3888 e
->ts
.kind
= op1
->ts
.kind
;
3893 _("Operands of string concatenation operator at %%L are %s/%s"),
3894 gfc_typename (&op1
->ts
), gfc_typename (&op2
->ts
));
3900 case INTRINSIC_NEQV
:
3901 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
3903 e
->ts
.type
= BT_LOGICAL
;
3904 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
3905 if (op1
->ts
.kind
< e
->ts
.kind
)
3906 gfc_convert_type (op1
, &e
->ts
, 2);
3907 else if (op2
->ts
.kind
< e
->ts
.kind
)
3908 gfc_convert_type (op2
, &e
->ts
, 2);
3912 /* Logical ops on integers become bitwise ops with -fdec. */
3914 && (op1
->ts
.type
== BT_INTEGER
|| op2
->ts
.type
== BT_INTEGER
))
3916 e
->ts
.type
= BT_INTEGER
;
3917 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
3918 if (op1
->ts
.type
!= e
->ts
.type
|| op1
->ts
.kind
!= e
->ts
.kind
)
3919 gfc_convert_type (op1
, &e
->ts
, 1);
3920 if (op2
->ts
.type
!= e
->ts
.type
|| op2
->ts
.kind
!= e
->ts
.kind
)
3921 gfc_convert_type (op2
, &e
->ts
, 1);
3922 e
= logical_to_bitwise (e
);
3923 return resolve_function (e
);
3926 sprintf (msg
, _("Operands of logical operator %%<%s%%> at %%L are %s/%s"),
3927 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
3928 gfc_typename (&op2
->ts
));
3933 /* Logical ops on integers become bitwise ops with -fdec. */
3934 if (flag_dec
&& op1
->ts
.type
== BT_INTEGER
)
3936 e
->ts
.type
= BT_INTEGER
;
3937 e
->ts
.kind
= op1
->ts
.kind
;
3938 e
= logical_to_bitwise (e
);
3939 return resolve_function (e
);
3942 if (op1
->ts
.type
== BT_LOGICAL
)
3944 e
->ts
.type
= BT_LOGICAL
;
3945 e
->ts
.kind
= op1
->ts
.kind
;
3949 sprintf (msg
, _("Operand of .not. operator at %%L is %s"),
3950 gfc_typename (&op1
->ts
));
3954 case INTRINSIC_GT_OS
:
3956 case INTRINSIC_GE_OS
:
3958 case INTRINSIC_LT_OS
:
3960 case INTRINSIC_LE_OS
:
3961 if (op1
->ts
.type
== BT_COMPLEX
|| op2
->ts
.type
== BT_COMPLEX
)
3963 strcpy (msg
, _("COMPLEX quantities cannot be compared at %L"));
3970 case INTRINSIC_EQ_OS
:
3972 case INTRINSIC_NE_OS
:
3973 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
3974 && op1
->ts
.kind
== op2
->ts
.kind
)
3976 e
->ts
.type
= BT_LOGICAL
;
3977 e
->ts
.kind
= gfc_default_logical_kind
;
3981 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
3983 gfc_type_convert_binary (e
, 1);
3985 e
->ts
.type
= BT_LOGICAL
;
3986 e
->ts
.kind
= gfc_default_logical_kind
;
3988 if (warn_compare_reals
)
3990 gfc_intrinsic_op op
= e
->value
.op
.op
;
3992 /* Type conversion has made sure that the types of op1 and op2
3993 agree, so it is only necessary to check the first one. */
3994 if ((op1
->ts
.type
== BT_REAL
|| op1
->ts
.type
== BT_COMPLEX
)
3995 && (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
3996 || op
== INTRINSIC_NE
|| op
== INTRINSIC_NE_OS
))
4000 if (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
)
4001 msg
= "Equality comparison for %s at %L";
4003 msg
= "Inequality comparison for %s at %L";
4005 gfc_warning (OPT_Wcompare_reals
, msg
,
4006 gfc_typename (&op1
->ts
), &op1
->where
);
4013 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
4015 _("Logicals at %%L must be compared with %s instead of %s"),
4016 (e
->value
.op
.op
== INTRINSIC_EQ
4017 || e
->value
.op
.op
== INTRINSIC_EQ_OS
)
4018 ? ".eqv." : ".neqv.", gfc_op2string (e
->value
.op
.op
));
4021 _("Operands of comparison operator %%<%s%%> at %%L are %s/%s"),
4022 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
4023 gfc_typename (&op2
->ts
));
4027 case INTRINSIC_USER
:
4028 if (e
->value
.op
.uop
->op
== NULL
)
4030 const char *name
= e
->value
.op
.uop
->name
;
4031 const char *guessed
;
4032 guessed
= lookup_uop_fuzzy (name
, e
->value
.op
.uop
->ns
->uop_root
);
4034 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L; did you mean '%s'?"),
4037 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L"), name
);
4039 else if (op2
== NULL
)
4040 sprintf (msg
, _("Operand of user operator %%<%s%%> at %%L is %s"),
4041 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
));
4044 sprintf (msg
, _("Operands of user operator %%<%s%%> at %%L are %s/%s"),
4045 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
),
4046 gfc_typename (&op2
->ts
));
4047 e
->value
.op
.uop
->op
->sym
->attr
.referenced
= 1;
4052 case INTRINSIC_PARENTHESES
:
4054 if (e
->ts
.type
== BT_CHARACTER
)
4055 e
->ts
.u
.cl
= op1
->ts
.u
.cl
;
4059 gfc_internal_error ("resolve_operator(): Bad intrinsic");
4062 /* Deal with arrayness of an operand through an operator. */
4066 switch (e
->value
.op
.op
)
4068 case INTRINSIC_PLUS
:
4069 case INTRINSIC_MINUS
:
4070 case INTRINSIC_TIMES
:
4071 case INTRINSIC_DIVIDE
:
4072 case INTRINSIC_POWER
:
4073 case INTRINSIC_CONCAT
:
4077 case INTRINSIC_NEQV
:
4079 case INTRINSIC_EQ_OS
:
4081 case INTRINSIC_NE_OS
:
4083 case INTRINSIC_GT_OS
:
4085 case INTRINSIC_GE_OS
:
4087 case INTRINSIC_LT_OS
:
4089 case INTRINSIC_LE_OS
:
4091 if (op1
->rank
== 0 && op2
->rank
== 0)
4094 if (op1
->rank
== 0 && op2
->rank
!= 0)
4096 e
->rank
= op2
->rank
;
4098 if (e
->shape
== NULL
)
4099 e
->shape
= gfc_copy_shape (op2
->shape
, op2
->rank
);
4102 if (op1
->rank
!= 0 && op2
->rank
== 0)
4104 e
->rank
= op1
->rank
;
4106 if (e
->shape
== NULL
)
4107 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4110 if (op1
->rank
!= 0 && op2
->rank
!= 0)
4112 if (op1
->rank
== op2
->rank
)
4114 e
->rank
= op1
->rank
;
4115 if (e
->shape
== NULL
)
4117 t
= compare_shapes (op1
, op2
);
4121 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4126 /* Allow higher level expressions to work. */
4129 /* Try user-defined operators, and otherwise throw an error. */
4130 dual_locus_error
= true;
4132 _("Inconsistent ranks for operator at %%L and %%L"));
4139 case INTRINSIC_PARENTHESES
:
4141 case INTRINSIC_UPLUS
:
4142 case INTRINSIC_UMINUS
:
4143 /* Simply copy arrayness attribute */
4144 e
->rank
= op1
->rank
;
4146 if (e
->shape
== NULL
)
4147 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4155 /* Attempt to simplify the expression. */
4158 t
= gfc_simplify_expr (e
, 0);
4159 /* Some calls do not succeed in simplification and return false
4160 even though there is no error; e.g. variable references to
4161 PARAMETER arrays. */
4162 if (!gfc_is_constant_expr (e
))
4170 match m
= gfc_extend_expr (e
);
4173 if (m
== MATCH_ERROR
)
4177 if (dual_locus_error
)
4178 gfc_error (msg
, &op1
->where
, &op2
->where
);
4180 gfc_error (msg
, &e
->where
);
4186 /************** Array resolution subroutines **************/
4189 { CMP_LT
, CMP_EQ
, CMP_GT
, CMP_UNKNOWN
};
4191 /* Compare two integer expressions. */
4193 static compare_result
4194 compare_bound (gfc_expr
*a
, gfc_expr
*b
)
4198 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
4199 || b
== NULL
|| b
->expr_type
!= EXPR_CONSTANT
)
4202 /* If either of the types isn't INTEGER, we must have
4203 raised an error earlier. */
4205 if (a
->ts
.type
!= BT_INTEGER
|| b
->ts
.type
!= BT_INTEGER
)
4208 i
= mpz_cmp (a
->value
.integer
, b
->value
.integer
);
4218 /* Compare an integer expression with an integer. */
4220 static compare_result
4221 compare_bound_int (gfc_expr
*a
, int b
)
4225 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4228 if (a
->ts
.type
!= BT_INTEGER
)
4229 gfc_internal_error ("compare_bound_int(): Bad expression");
4231 i
= mpz_cmp_si (a
->value
.integer
, b
);
4241 /* Compare an integer expression with a mpz_t. */
4243 static compare_result
4244 compare_bound_mpz_t (gfc_expr
*a
, mpz_t b
)
4248 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4251 if (a
->ts
.type
!= BT_INTEGER
)
4252 gfc_internal_error ("compare_bound_int(): Bad expression");
4254 i
= mpz_cmp (a
->value
.integer
, b
);
4264 /* Compute the last value of a sequence given by a triplet.
4265 Return 0 if it wasn't able to compute the last value, or if the
4266 sequence if empty, and 1 otherwise. */
4269 compute_last_value_for_triplet (gfc_expr
*start
, gfc_expr
*end
,
4270 gfc_expr
*stride
, mpz_t last
)
4274 if (start
== NULL
|| start
->expr_type
!= EXPR_CONSTANT
4275 || end
== NULL
|| end
->expr_type
!= EXPR_CONSTANT
4276 || (stride
!= NULL
&& stride
->expr_type
!= EXPR_CONSTANT
))
4279 if (start
->ts
.type
!= BT_INTEGER
|| end
->ts
.type
!= BT_INTEGER
4280 || (stride
!= NULL
&& stride
->ts
.type
!= BT_INTEGER
))
4283 if (stride
== NULL
|| compare_bound_int (stride
, 1) == CMP_EQ
)
4285 if (compare_bound (start
, end
) == CMP_GT
)
4287 mpz_set (last
, end
->value
.integer
);
4291 if (compare_bound_int (stride
, 0) == CMP_GT
)
4293 /* Stride is positive */
4294 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) > 0)
4299 /* Stride is negative */
4300 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) < 0)
4305 mpz_sub (rem
, end
->value
.integer
, start
->value
.integer
);
4306 mpz_tdiv_r (rem
, rem
, stride
->value
.integer
);
4307 mpz_sub (last
, end
->value
.integer
, rem
);
4314 /* Compare a single dimension of an array reference to the array
4318 check_dimension (int i
, gfc_array_ref
*ar
, gfc_array_spec
*as
)
4322 if (ar
->dimen_type
[i
] == DIMEN_STAR
)
4324 gcc_assert (ar
->stride
[i
] == NULL
);
4325 /* This implies [*] as [*:] and [*:3] are not possible. */
4326 if (ar
->start
[i
] == NULL
)
4328 gcc_assert (ar
->end
[i
] == NULL
);
4333 /* Given start, end and stride values, calculate the minimum and
4334 maximum referenced indexes. */
4336 switch (ar
->dimen_type
[i
])
4339 case DIMEN_THIS_IMAGE
:
4344 if (compare_bound (ar
->start
[i
], as
->lower
[i
]) == CMP_LT
)
4347 gfc_warning (0, "Array reference at %L is out of bounds "
4348 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4349 mpz_get_si (ar
->start
[i
]->value
.integer
),
4350 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4352 gfc_warning (0, "Array reference at %L is out of bounds "
4353 "(%ld < %ld) in codimension %d", &ar
->c_where
[i
],
4354 mpz_get_si (ar
->start
[i
]->value
.integer
),
4355 mpz_get_si (as
->lower
[i
]->value
.integer
),
4359 if (compare_bound (ar
->start
[i
], as
->upper
[i
]) == CMP_GT
)
4362 gfc_warning (0, "Array reference at %L is out of bounds "
4363 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4364 mpz_get_si (ar
->start
[i
]->value
.integer
),
4365 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4367 gfc_warning (0, "Array reference at %L is out of bounds "
4368 "(%ld > %ld) in codimension %d", &ar
->c_where
[i
],
4369 mpz_get_si (ar
->start
[i
]->value
.integer
),
4370 mpz_get_si (as
->upper
[i
]->value
.integer
),
4379 #define AR_START (ar->start[i] ? ar->start[i] : as->lower[i])
4380 #define AR_END (ar->end[i] ? ar->end[i] : as->upper[i])
4382 compare_result comp_start_end
= compare_bound (AR_START
, AR_END
);
4384 /* Check for zero stride, which is not allowed. */
4385 if (compare_bound_int (ar
->stride
[i
], 0) == CMP_EQ
)
4387 gfc_error ("Illegal stride of zero at %L", &ar
->c_where
[i
]);
4391 /* if start == len || (stride > 0 && start < len)
4392 || (stride < 0 && start > len),
4393 then the array section contains at least one element. In this
4394 case, there is an out-of-bounds access if
4395 (start < lower || start > upper). */
4396 if (compare_bound (AR_START
, AR_END
) == CMP_EQ
4397 || ((compare_bound_int (ar
->stride
[i
], 0) == CMP_GT
4398 || ar
->stride
[i
] == NULL
) && comp_start_end
== CMP_LT
)
4399 || (compare_bound_int (ar
->stride
[i
], 0) == CMP_LT
4400 && comp_start_end
== CMP_GT
))
4402 if (compare_bound (AR_START
, as
->lower
[i
]) == CMP_LT
)
4404 gfc_warning (0, "Lower array reference at %L is out of bounds "
4405 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4406 mpz_get_si (AR_START
->value
.integer
),
4407 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4410 if (compare_bound (AR_START
, as
->upper
[i
]) == CMP_GT
)
4412 gfc_warning (0, "Lower array reference at %L is out of bounds "
4413 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4414 mpz_get_si (AR_START
->value
.integer
),
4415 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4420 /* If we can compute the highest index of the array section,
4421 then it also has to be between lower and upper. */
4422 mpz_init (last_value
);
4423 if (compute_last_value_for_triplet (AR_START
, AR_END
, ar
->stride
[i
],
4426 if (compare_bound_mpz_t (as
->lower
[i
], last_value
) == CMP_GT
)
4428 gfc_warning (0, "Upper array reference at %L is out of bounds "
4429 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4430 mpz_get_si (last_value
),
4431 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4432 mpz_clear (last_value
);
4435 if (compare_bound_mpz_t (as
->upper
[i
], last_value
) == CMP_LT
)
4437 gfc_warning (0, "Upper array reference at %L is out of bounds "
4438 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4439 mpz_get_si (last_value
),
4440 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4441 mpz_clear (last_value
);
4445 mpz_clear (last_value
);
4453 gfc_internal_error ("check_dimension(): Bad array reference");
4460 /* Compare an array reference with an array specification. */
4463 compare_spec_to_ref (gfc_array_ref
*ar
)
4470 /* TODO: Full array sections are only allowed as actual parameters. */
4471 if (as
->type
== AS_ASSUMED_SIZE
4472 && (/*ar->type == AR_FULL
4473 ||*/ (ar
->type
== AR_SECTION
4474 && ar
->dimen_type
[i
] == DIMEN_RANGE
&& ar
->end
[i
] == NULL
)))
4476 gfc_error ("Rightmost upper bound of assumed size array section "
4477 "not specified at %L", &ar
->where
);
4481 if (ar
->type
== AR_FULL
)
4484 if (as
->rank
!= ar
->dimen
)
4486 gfc_error ("Rank mismatch in array reference at %L (%d/%d)",
4487 &ar
->where
, ar
->dimen
, as
->rank
);
4491 /* ar->codimen == 0 is a local array. */
4492 if (as
->corank
!= ar
->codimen
&& ar
->codimen
!= 0)
4494 gfc_error ("Coindex rank mismatch in array reference at %L (%d/%d)",
4495 &ar
->where
, ar
->codimen
, as
->corank
);
4499 for (i
= 0; i
< as
->rank
; i
++)
4500 if (!check_dimension (i
, ar
, as
))
4503 /* Local access has no coarray spec. */
4504 if (ar
->codimen
!= 0)
4505 for (i
= as
->rank
; i
< as
->rank
+ as
->corank
; i
++)
4507 if (ar
->dimen_type
[i
] != DIMEN_ELEMENT
&& !ar
->in_allocate
4508 && ar
->dimen_type
[i
] != DIMEN_THIS_IMAGE
)
4510 gfc_error ("Coindex of codimension %d must be a scalar at %L",
4511 i
+ 1 - as
->rank
, &ar
->where
);
4514 if (!check_dimension (i
, ar
, as
))
4522 /* Resolve one part of an array index. */
4525 gfc_resolve_index_1 (gfc_expr
*index
, int check_scalar
,
4526 int force_index_integer_kind
)
4533 if (!gfc_resolve_expr (index
))
4536 if (check_scalar
&& index
->rank
!= 0)
4538 gfc_error ("Array index at %L must be scalar", &index
->where
);
4542 if (index
->ts
.type
!= BT_INTEGER
&& index
->ts
.type
!= BT_REAL
)
4544 gfc_error ("Array index at %L must be of INTEGER type, found %s",
4545 &index
->where
, gfc_basic_typename (index
->ts
.type
));
4549 if (index
->ts
.type
== BT_REAL
)
4550 if (!gfc_notify_std (GFC_STD_LEGACY
, "REAL array index at %L",
4554 if ((index
->ts
.kind
!= gfc_index_integer_kind
4555 && force_index_integer_kind
)
4556 || index
->ts
.type
!= BT_INTEGER
)
4559 ts
.type
= BT_INTEGER
;
4560 ts
.kind
= gfc_index_integer_kind
;
4562 gfc_convert_type_warn (index
, &ts
, 2, 0);
4568 /* Resolve one part of an array index. */
4571 gfc_resolve_index (gfc_expr
*index
, int check_scalar
)
4573 return gfc_resolve_index_1 (index
, check_scalar
, 1);
4576 /* Resolve a dim argument to an intrinsic function. */
4579 gfc_resolve_dim_arg (gfc_expr
*dim
)
4584 if (!gfc_resolve_expr (dim
))
4589 gfc_error ("Argument dim at %L must be scalar", &dim
->where
);
4594 if (dim
->ts
.type
!= BT_INTEGER
)
4596 gfc_error ("Argument dim at %L must be of INTEGER type", &dim
->where
);
4600 if (dim
->ts
.kind
!= gfc_index_integer_kind
)
4605 ts
.type
= BT_INTEGER
;
4606 ts
.kind
= gfc_index_integer_kind
;
4608 gfc_convert_type_warn (dim
, &ts
, 2, 0);
4614 /* Given an expression that contains array references, update those array
4615 references to point to the right array specifications. While this is
4616 filled in during matching, this information is difficult to save and load
4617 in a module, so we take care of it here.
4619 The idea here is that the original array reference comes from the
4620 base symbol. We traverse the list of reference structures, setting
4621 the stored reference to references. Component references can
4622 provide an additional array specification. */
4625 find_array_spec (gfc_expr
*e
)
4631 if (e
->symtree
->n
.sym
->ts
.type
== BT_CLASS
)
4632 as
= CLASS_DATA (e
->symtree
->n
.sym
)->as
;
4634 as
= e
->symtree
->n
.sym
->as
;
4636 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4641 gfc_internal_error ("find_array_spec(): Missing spec");
4648 c
= ref
->u
.c
.component
;
4649 if (c
->attr
.dimension
)
4652 gfc_internal_error ("find_array_spec(): unused as(1)");
4663 gfc_internal_error ("find_array_spec(): unused as(2)");
4667 /* Resolve an array reference. */
4670 resolve_array_ref (gfc_array_ref
*ar
)
4672 int i
, check_scalar
;
4675 for (i
= 0; i
< ar
->dimen
+ ar
->codimen
; i
++)
4677 check_scalar
= ar
->dimen_type
[i
] == DIMEN_RANGE
;
4679 /* Do not force gfc_index_integer_kind for the start. We can
4680 do fine with any integer kind. This avoids temporary arrays
4681 created for indexing with a vector. */
4682 if (!gfc_resolve_index_1 (ar
->start
[i
], check_scalar
, 0))
4684 if (!gfc_resolve_index (ar
->end
[i
], check_scalar
))
4686 if (!gfc_resolve_index (ar
->stride
[i
], check_scalar
))
4691 if (ar
->dimen_type
[i
] == DIMEN_UNKNOWN
)
4695 ar
->dimen_type
[i
] = DIMEN_ELEMENT
;
4699 ar
->dimen_type
[i
] = DIMEN_VECTOR
;
4700 if (e
->expr_type
== EXPR_VARIABLE
4701 && e
->symtree
->n
.sym
->ts
.type
== BT_DERIVED
)
4702 ar
->start
[i
] = gfc_get_parentheses (e
);
4706 gfc_error ("Array index at %L is an array of rank %d",
4707 &ar
->c_where
[i
], e
->rank
);
4711 /* Fill in the upper bound, which may be lower than the
4712 specified one for something like a(2:10:5), which is
4713 identical to a(2:7:5). Only relevant for strides not equal
4714 to one. Don't try a division by zero. */
4715 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4716 && ar
->stride
[i
] != NULL
&& ar
->stride
[i
]->expr_type
== EXPR_CONSTANT
4717 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 1L) != 0
4718 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 0L) != 0)
4722 if (gfc_ref_dimen_size (ar
, i
, &size
, &end
))
4724 if (ar
->end
[i
] == NULL
)
4727 gfc_get_constant_expr (BT_INTEGER
, gfc_index_integer_kind
,
4729 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4731 else if (ar
->end
[i
]->ts
.type
== BT_INTEGER
4732 && ar
->end
[i
]->expr_type
== EXPR_CONSTANT
)
4734 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4745 if (ar
->type
== AR_FULL
)
4747 if (ar
->as
->rank
== 0)
4748 ar
->type
= AR_ELEMENT
;
4750 /* Make sure array is the same as array(:,:), this way
4751 we don't need to special case all the time. */
4752 ar
->dimen
= ar
->as
->rank
;
4753 for (i
= 0; i
< ar
->dimen
; i
++)
4755 ar
->dimen_type
[i
] = DIMEN_RANGE
;
4757 gcc_assert (ar
->start
[i
] == NULL
);
4758 gcc_assert (ar
->end
[i
] == NULL
);
4759 gcc_assert (ar
->stride
[i
] == NULL
);
4763 /* If the reference type is unknown, figure out what kind it is. */
4765 if (ar
->type
== AR_UNKNOWN
)
4767 ar
->type
= AR_ELEMENT
;
4768 for (i
= 0; i
< ar
->dimen
; i
++)
4769 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4770 || ar
->dimen_type
[i
] == DIMEN_VECTOR
)
4772 ar
->type
= AR_SECTION
;
4777 if (!ar
->as
->cray_pointee
&& !compare_spec_to_ref (ar
))
4780 if (ar
->as
->corank
&& ar
->codimen
== 0)
4783 ar
->codimen
= ar
->as
->corank
;
4784 for (n
= ar
->dimen
; n
< ar
->dimen
+ ar
->codimen
; n
++)
4785 ar
->dimen_type
[n
] = DIMEN_THIS_IMAGE
;
4793 resolve_substring (gfc_ref
*ref
)
4795 int k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
4797 if (ref
->u
.ss
.start
!= NULL
)
4799 if (!gfc_resolve_expr (ref
->u
.ss
.start
))
4802 if (ref
->u
.ss
.start
->ts
.type
!= BT_INTEGER
)
4804 gfc_error ("Substring start index at %L must be of type INTEGER",
4805 &ref
->u
.ss
.start
->where
);
4809 if (ref
->u
.ss
.start
->rank
!= 0)
4811 gfc_error ("Substring start index at %L must be scalar",
4812 &ref
->u
.ss
.start
->where
);
4816 if (compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_LT
4817 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4818 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4820 gfc_error ("Substring start index at %L is less than one",
4821 &ref
->u
.ss
.start
->where
);
4826 if (ref
->u
.ss
.end
!= NULL
)
4828 if (!gfc_resolve_expr (ref
->u
.ss
.end
))
4831 if (ref
->u
.ss
.end
->ts
.type
!= BT_INTEGER
)
4833 gfc_error ("Substring end index at %L must be of type INTEGER",
4834 &ref
->u
.ss
.end
->where
);
4838 if (ref
->u
.ss
.end
->rank
!= 0)
4840 gfc_error ("Substring end index at %L must be scalar",
4841 &ref
->u
.ss
.end
->where
);
4845 if (ref
->u
.ss
.length
!= NULL
4846 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_GT
4847 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4848 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4850 gfc_error ("Substring end index at %L exceeds the string length",
4851 &ref
->u
.ss
.start
->where
);
4855 if (compare_bound_mpz_t (ref
->u
.ss
.end
,
4856 gfc_integer_kinds
[k
].huge
) == CMP_GT
4857 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4858 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4860 gfc_error ("Substring end index at %L is too large",
4861 &ref
->u
.ss
.end
->where
);
4870 /* This function supplies missing substring charlens. */
4873 gfc_resolve_substring_charlen (gfc_expr
*e
)
4876 gfc_expr
*start
, *end
;
4877 gfc_typespec
*ts
= NULL
;
4879 for (char_ref
= e
->ref
; char_ref
; char_ref
= char_ref
->next
)
4881 if (char_ref
->type
== REF_SUBSTRING
)
4883 if (char_ref
->type
== REF_COMPONENT
)
4884 ts
= &char_ref
->u
.c
.component
->ts
;
4890 gcc_assert (char_ref
->next
== NULL
);
4894 if (e
->ts
.u
.cl
->length
)
4895 gfc_free_expr (e
->ts
.u
.cl
->length
);
4896 else if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
->attr
.dummy
)
4900 e
->ts
.type
= BT_CHARACTER
;
4901 e
->ts
.kind
= gfc_default_character_kind
;
4904 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
4906 if (char_ref
->u
.ss
.start
)
4907 start
= gfc_copy_expr (char_ref
->u
.ss
.start
);
4909 start
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 1);
4911 if (char_ref
->u
.ss
.end
)
4912 end
= gfc_copy_expr (char_ref
->u
.ss
.end
);
4913 else if (e
->expr_type
== EXPR_VARIABLE
)
4916 ts
= &e
->symtree
->n
.sym
->ts
;
4917 end
= gfc_copy_expr (ts
->u
.cl
->length
);
4924 gfc_free_expr (start
);
4925 gfc_free_expr (end
);
4929 /* Length = (end - start + 1). */
4930 e
->ts
.u
.cl
->length
= gfc_subtract (end
, start
);
4931 e
->ts
.u
.cl
->length
= gfc_add (e
->ts
.u
.cl
->length
,
4932 gfc_get_int_expr (gfc_charlen_int_kind
,
4935 /* F2008, 6.4.1: Both the starting point and the ending point shall
4936 be within the range 1, 2, ..., n unless the starting point exceeds
4937 the ending point, in which case the substring has length zero. */
4939 if (mpz_cmp_si (e
->ts
.u
.cl
->length
->value
.integer
, 0) < 0)
4940 mpz_set_si (e
->ts
.u
.cl
->length
->value
.integer
, 0);
4942 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
4943 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
4945 /* Make sure that the length is simplified. */
4946 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 1);
4947 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
4951 /* Resolve subtype references. */
4954 resolve_ref (gfc_expr
*expr
)
4956 int current_part_dimension
, n_components
, seen_part_dimension
;
4959 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
4960 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.as
== NULL
)
4962 find_array_spec (expr
);
4966 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
4970 if (!resolve_array_ref (&ref
->u
.ar
))
4978 if (!resolve_substring (ref
))
4983 /* Check constraints on part references. */
4985 current_part_dimension
= 0;
4986 seen_part_dimension
= 0;
4989 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
4994 switch (ref
->u
.ar
.type
)
4997 /* Coarray scalar. */
4998 if (ref
->u
.ar
.as
->rank
== 0)
5000 current_part_dimension
= 0;
5005 current_part_dimension
= 1;
5009 current_part_dimension
= 0;
5013 gfc_internal_error ("resolve_ref(): Bad array reference");
5019 if (current_part_dimension
|| seen_part_dimension
)
5022 if (ref
->u
.c
.component
->attr
.pointer
5023 || ref
->u
.c
.component
->attr
.proc_pointer
5024 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5025 && CLASS_DATA (ref
->u
.c
.component
)->attr
.pointer
))
5027 gfc_error ("Component to the right of a part reference "
5028 "with nonzero rank must not have the POINTER "
5029 "attribute at %L", &expr
->where
);
5032 else if (ref
->u
.c
.component
->attr
.allocatable
5033 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5034 && CLASS_DATA (ref
->u
.c
.component
)->attr
.allocatable
))
5037 gfc_error ("Component to the right of a part reference "
5038 "with nonzero rank must not have the ALLOCATABLE "
5039 "attribute at %L", &expr
->where
);
5051 if (((ref
->type
== REF_COMPONENT
&& n_components
> 1)
5052 || ref
->next
== NULL
)
5053 && current_part_dimension
5054 && seen_part_dimension
)
5056 gfc_error ("Two or more part references with nonzero rank must "
5057 "not be specified at %L", &expr
->where
);
5061 if (ref
->type
== REF_COMPONENT
)
5063 if (current_part_dimension
)
5064 seen_part_dimension
= 1;
5066 /* reset to make sure */
5067 current_part_dimension
= 0;
5075 /* Given an expression, determine its shape. This is easier than it sounds.
5076 Leaves the shape array NULL if it is not possible to determine the shape. */
5079 expression_shape (gfc_expr
*e
)
5081 mpz_t array
[GFC_MAX_DIMENSIONS
];
5084 if (e
->rank
<= 0 || e
->shape
!= NULL
)
5087 for (i
= 0; i
< e
->rank
; i
++)
5088 if (!gfc_array_dimen_size (e
, i
, &array
[i
]))
5091 e
->shape
= gfc_get_shape (e
->rank
);
5093 memcpy (e
->shape
, array
, e
->rank
* sizeof (mpz_t
));
5098 for (i
--; i
>= 0; i
--)
5099 mpz_clear (array
[i
]);
5103 /* Given a variable expression node, compute the rank of the expression by
5104 examining the base symbol and any reference structures it may have. */
5107 expression_rank (gfc_expr
*e
)
5112 /* Just to make sure, because EXPR_COMPCALL's also have an e->ref and that
5113 could lead to serious confusion... */
5114 gcc_assert (e
->expr_type
!= EXPR_COMPCALL
);
5118 if (e
->expr_type
== EXPR_ARRAY
)
5120 /* Constructors can have a rank different from one via RESHAPE(). */
5122 if (e
->symtree
== NULL
)
5128 e
->rank
= (e
->symtree
->n
.sym
->as
== NULL
)
5129 ? 0 : e
->symtree
->n
.sym
->as
->rank
;
5135 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5137 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.proc_pointer
5138 && ref
->u
.c
.component
->attr
.function
&& !ref
->next
)
5139 rank
= ref
->u
.c
.component
->as
? ref
->u
.c
.component
->as
->rank
: 0;
5141 if (ref
->type
!= REF_ARRAY
)
5144 if (ref
->u
.ar
.type
== AR_FULL
)
5146 rank
= ref
->u
.ar
.as
->rank
;
5150 if (ref
->u
.ar
.type
== AR_SECTION
)
5152 /* Figure out the rank of the section. */
5154 gfc_internal_error ("expression_rank(): Two array specs");
5156 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
5157 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_RANGE
5158 || ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
)
5168 expression_shape (e
);
5173 add_caf_get_intrinsic (gfc_expr
*e
)
5175 gfc_expr
*wrapper
, *tmp_expr
;
5179 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5180 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5185 for (n
= ref
->u
.ar
.dimen
; n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
5186 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_ELEMENT
)
5189 tmp_expr
= XCNEW (gfc_expr
);
5191 wrapper
= gfc_build_intrinsic_call (gfc_current_ns
, GFC_ISYM_CAF_GET
,
5192 "caf_get", tmp_expr
->where
, 1, tmp_expr
);
5193 wrapper
->ts
= e
->ts
;
5194 wrapper
->rank
= e
->rank
;
5196 wrapper
->shape
= gfc_copy_shape (e
->shape
, e
->rank
);
5203 remove_caf_get_intrinsic (gfc_expr
*e
)
5205 gcc_assert (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
5206 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
);
5207 gfc_expr
*e2
= e
->value
.function
.actual
->expr
;
5208 e
->value
.function
.actual
->expr
= NULL
;
5209 gfc_free_actual_arglist (e
->value
.function
.actual
);
5210 gfc_free_shape (&e
->shape
, e
->rank
);
5216 /* Resolve a variable expression. */
5219 resolve_variable (gfc_expr
*e
)
5226 if (e
->symtree
== NULL
)
5228 sym
= e
->symtree
->n
.sym
;
5230 /* Use same check as for TYPE(*) below; this check has to be before TYPE(*)
5231 as ts.type is set to BT_ASSUMED in resolve_symbol. */
5232 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
5234 if (!actual_arg
|| inquiry_argument
)
5236 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may only "
5237 "be used as actual argument", sym
->name
, &e
->where
);
5241 /* TS 29113, 407b. */
5242 else if (e
->ts
.type
== BT_ASSUMED
)
5246 gfc_error ("Assumed-type variable %s at %L may only be used "
5247 "as actual argument", sym
->name
, &e
->where
);
5250 else if (inquiry_argument
&& !first_actual_arg
)
5252 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5253 for all inquiry functions in resolve_function; the reason is
5254 that the function-name resolution happens too late in that
5256 gfc_error ("Assumed-type variable %s at %L as actual argument to "
5257 "an inquiry function shall be the first argument",
5258 sym
->name
, &e
->where
);
5262 /* TS 29113, C535b. */
5263 else if ((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5264 && CLASS_DATA (sym
)->as
5265 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5266 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5267 && sym
->as
->type
== AS_ASSUMED_RANK
))
5271 gfc_error ("Assumed-rank variable %s at %L may only be used as "
5272 "actual argument", sym
->name
, &e
->where
);
5275 else if (inquiry_argument
&& !first_actual_arg
)
5277 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5278 for all inquiry functions in resolve_function; the reason is
5279 that the function-name resolution happens too late in that
5281 gfc_error ("Assumed-rank variable %s at %L as actual argument "
5282 "to an inquiry function shall be the first argument",
5283 sym
->name
, &e
->where
);
5288 if ((sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
)) && e
->ref
5289 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5290 && e
->ref
->next
== NULL
))
5292 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall not have "
5293 "a subobject reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5296 /* TS 29113, 407b. */
5297 else if (e
->ts
.type
== BT_ASSUMED
&& e
->ref
5298 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5299 && e
->ref
->next
== NULL
))
5301 gfc_error ("Assumed-type variable %s at %L shall not have a subobject "
5302 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5306 /* TS 29113, C535b. */
5307 if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5308 && CLASS_DATA (sym
)->as
5309 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5310 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5311 && sym
->as
->type
== AS_ASSUMED_RANK
))
5313 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5314 && e
->ref
->next
== NULL
))
5316 gfc_error ("Assumed-rank variable %s at %L shall not have a subobject "
5317 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5321 /* For variables that are used in an associate (target => object) where
5322 the object's basetype is array valued while the target is scalar,
5323 the ts' type of the component refs is still array valued, which
5324 can't be translated that way. */
5325 if (sym
->assoc
&& e
->rank
== 0 && e
->ref
&& sym
->ts
.type
== BT_CLASS
5326 && sym
->assoc
->target
->ts
.type
== BT_CLASS
5327 && CLASS_DATA (sym
->assoc
->target
)->as
)
5329 gfc_ref
*ref
= e
->ref
;
5335 ref
->u
.c
.sym
= sym
->ts
.u
.derived
;
5336 /* Stop the loop. */
5346 /* If this is an associate-name, it may be parsed with an array reference
5347 in error even though the target is scalar. Fail directly in this case.
5348 TODO Understand why class scalar expressions must be excluded. */
5349 if (sym
->assoc
&& !(sym
->ts
.type
== BT_CLASS
&& e
->rank
== 0))
5351 if (sym
->ts
.type
== BT_CLASS
)
5352 gfc_fix_class_refs (e
);
5353 if (!sym
->attr
.dimension
&& e
->ref
&& e
->ref
->type
== REF_ARRAY
)
5357 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.generic
)
5358 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
5360 /* On the other hand, the parser may not have known this is an array;
5361 in this case, we have to add a FULL reference. */
5362 if (sym
->assoc
&& sym
->attr
.dimension
&& !e
->ref
)
5364 e
->ref
= gfc_get_ref ();
5365 e
->ref
->type
= REF_ARRAY
;
5366 e
->ref
->u
.ar
.type
= AR_FULL
;
5367 e
->ref
->u
.ar
.dimen
= 0;
5370 /* Like above, but for class types, where the checking whether an array
5371 ref is present is more complicated. Furthermore make sure not to add
5372 the full array ref to _vptr or _len refs. */
5373 if (sym
->assoc
&& sym
->ts
.type
== BT_CLASS
5374 && CLASS_DATA (sym
)->attr
.dimension
5375 && (e
->ts
.type
!= BT_DERIVED
|| !e
->ts
.u
.derived
->attr
.vtype
))
5377 gfc_ref
*ref
, *newref
;
5379 newref
= gfc_get_ref ();
5380 newref
->type
= REF_ARRAY
;
5381 newref
->u
.ar
.type
= AR_FULL
;
5382 newref
->u
.ar
.dimen
= 0;
5383 /* Because this is an associate var and the first ref either is a ref to
5384 the _data component or not, no traversal of the ref chain is
5385 needed. The array ref needs to be inserted after the _data ref,
5386 or when that is not present, which may happend for polymorphic
5387 types, then at the first position. */
5391 else if (ref
->type
== REF_COMPONENT
5392 && strcmp ("_data", ref
->u
.c
.component
->name
) == 0)
5394 if (!ref
->next
|| ref
->next
->type
!= REF_ARRAY
)
5396 newref
->next
= ref
->next
;
5400 /* Array ref present already. */
5401 gfc_free_ref_list (newref
);
5403 else if (ref
->type
== REF_ARRAY
)
5404 /* Array ref present already. */
5405 gfc_free_ref_list (newref
);
5413 if (e
->ref
&& !resolve_ref (e
))
5416 if (sym
->attr
.flavor
== FL_PROCEDURE
5417 && (!sym
->attr
.function
5418 || (sym
->attr
.function
&& sym
->result
5419 && sym
->result
->attr
.proc_pointer
5420 && !sym
->result
->attr
.function
)))
5422 e
->ts
.type
= BT_PROCEDURE
;
5423 goto resolve_procedure
;
5426 if (sym
->ts
.type
!= BT_UNKNOWN
)
5427 gfc_variable_attr (e
, &e
->ts
);
5428 else if (sym
->attr
.flavor
== FL_PROCEDURE
5429 && sym
->attr
.function
&& sym
->result
5430 && sym
->result
->ts
.type
!= BT_UNKNOWN
5431 && sym
->result
->attr
.proc_pointer
)
5432 e
->ts
= sym
->result
->ts
;
5435 /* Must be a simple variable reference. */
5436 if (!gfc_set_default_type (sym
, 1, sym
->ns
))
5441 if (check_assumed_size_reference (sym
, e
))
5444 /* Deal with forward references to entries during gfc_resolve_code, to
5445 satisfy, at least partially, 12.5.2.5. */
5446 if (gfc_current_ns
->entries
5447 && current_entry_id
== sym
->entry_id
5450 && cs_base
->current
->op
!= EXEC_ENTRY
)
5452 gfc_entry_list
*entry
;
5453 gfc_formal_arglist
*formal
;
5455 bool seen
, saved_specification_expr
;
5457 /* If the symbol is a dummy... */
5458 if (sym
->attr
.dummy
&& sym
->ns
== gfc_current_ns
)
5460 entry
= gfc_current_ns
->entries
;
5463 /* ...test if the symbol is a parameter of previous entries. */
5464 for (; entry
&& entry
->id
<= current_entry_id
; entry
= entry
->next
)
5465 for (formal
= entry
->sym
->formal
; formal
; formal
= formal
->next
)
5467 if (formal
->sym
&& sym
->name
== formal
->sym
->name
)
5474 /* If it has not been seen as a dummy, this is an error. */
5477 if (specification_expr
)
5478 gfc_error ("Variable %qs, used in a specification expression"
5479 ", is referenced at %L before the ENTRY statement "
5480 "in which it is a parameter",
5481 sym
->name
, &cs_base
->current
->loc
);
5483 gfc_error ("Variable %qs is used at %L before the ENTRY "
5484 "statement in which it is a parameter",
5485 sym
->name
, &cs_base
->current
->loc
);
5490 /* Now do the same check on the specification expressions. */
5491 saved_specification_expr
= specification_expr
;
5492 specification_expr
= true;
5493 if (sym
->ts
.type
== BT_CHARACTER
5494 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
5498 for (n
= 0; n
< sym
->as
->rank
; n
++)
5500 if (!gfc_resolve_expr (sym
->as
->lower
[n
]))
5502 if (!gfc_resolve_expr (sym
->as
->upper
[n
]))
5505 specification_expr
= saved_specification_expr
;
5508 /* Update the symbol's entry level. */
5509 sym
->entry_id
= current_entry_id
+ 1;
5512 /* If a symbol has been host_associated mark it. This is used latter,
5513 to identify if aliasing is possible via host association. */
5514 if (sym
->attr
.flavor
== FL_VARIABLE
5515 && gfc_current_ns
->parent
5516 && (gfc_current_ns
->parent
== sym
->ns
5517 || (gfc_current_ns
->parent
->parent
5518 && gfc_current_ns
->parent
->parent
== sym
->ns
)))
5519 sym
->attr
.host_assoc
= 1;
5521 if (gfc_current_ns
->proc_name
5522 && sym
->attr
.dimension
5523 && (sym
->ns
!= gfc_current_ns
5524 || sym
->attr
.use_assoc
5525 || sym
->attr
.in_common
))
5526 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
5529 if (t
&& !resolve_procedure_expression (e
))
5532 /* F2008, C617 and C1229. */
5533 if (!inquiry_argument
&& (e
->ts
.type
== BT_CLASS
|| e
->ts
.type
== BT_DERIVED
)
5534 && gfc_is_coindexed (e
))
5536 gfc_ref
*ref
, *ref2
= NULL
;
5538 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5540 if (ref
->type
== REF_COMPONENT
)
5542 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5546 for ( ; ref
; ref
= ref
->next
)
5547 if (ref
->type
== REF_COMPONENT
)
5550 /* Expression itself is not coindexed object. */
5551 if (ref
&& e
->ts
.type
== BT_CLASS
)
5553 gfc_error ("Polymorphic subobject of coindexed object at %L",
5558 /* Expression itself is coindexed object. */
5562 c
= ref2
? ref2
->u
.c
.component
: e
->symtree
->n
.sym
->components
;
5563 for ( ; c
; c
= c
->next
)
5564 if (c
->attr
.allocatable
&& c
->ts
.type
== BT_CLASS
)
5566 gfc_error ("Coindexed object with polymorphic allocatable "
5567 "subcomponent at %L", &e
->where
);
5575 expression_rank (e
);
5577 if (t
&& flag_coarray
== GFC_FCOARRAY_LIB
&& gfc_is_coindexed (e
))
5578 add_caf_get_intrinsic (e
);
5580 /* Simplify cases where access to a parameter array results in a
5581 single constant. Suppress errors since those will have been
5582 issued before, as warnings. */
5583 if (e
->rank
== 0 && sym
->as
&& sym
->attr
.flavor
== FL_PARAMETER
)
5585 gfc_push_suppress_errors ();
5586 gfc_simplify_expr (e
, 1);
5587 gfc_pop_suppress_errors ();
5594 /* Checks to see that the correct symbol has been host associated.
5595 The only situation where this arises is that in which a twice
5596 contained function is parsed after the host association is made.
5597 Therefore, on detecting this, change the symbol in the expression
5598 and convert the array reference into an actual arglist if the old
5599 symbol is a variable. */
5601 check_host_association (gfc_expr
*e
)
5603 gfc_symbol
*sym
, *old_sym
;
5607 gfc_actual_arglist
*arg
, *tail
= NULL
;
5608 bool retval
= e
->expr_type
== EXPR_FUNCTION
;
5610 /* If the expression is the result of substitution in
5611 interface.c(gfc_extend_expr) because there is no way in
5612 which the host association can be wrong. */
5613 if (e
->symtree
== NULL
5614 || e
->symtree
->n
.sym
== NULL
5615 || e
->user_operator
)
5618 old_sym
= e
->symtree
->n
.sym
;
5620 if (gfc_current_ns
->parent
5621 && old_sym
->ns
!= gfc_current_ns
)
5623 /* Use the 'USE' name so that renamed module symbols are
5624 correctly handled. */
5625 gfc_find_symbol (e
->symtree
->name
, gfc_current_ns
, 1, &sym
);
5627 if (sym
&& old_sym
!= sym
5628 && sym
->ts
.type
== old_sym
->ts
.type
5629 && sym
->attr
.flavor
== FL_PROCEDURE
5630 && sym
->attr
.contained
)
5632 /* Clear the shape, since it might not be valid. */
5633 gfc_free_shape (&e
->shape
, e
->rank
);
5635 /* Give the expression the right symtree! */
5636 gfc_find_sym_tree (e
->symtree
->name
, NULL
, 1, &st
);
5637 gcc_assert (st
!= NULL
);
5639 if (old_sym
->attr
.flavor
== FL_PROCEDURE
5640 || e
->expr_type
== EXPR_FUNCTION
)
5642 /* Original was function so point to the new symbol, since
5643 the actual argument list is already attached to the
5645 e
->value
.function
.esym
= NULL
;
5650 /* Original was variable so convert array references into
5651 an actual arglist. This does not need any checking now
5652 since resolve_function will take care of it. */
5653 e
->value
.function
.actual
= NULL
;
5654 e
->expr_type
= EXPR_FUNCTION
;
5657 /* Ambiguity will not arise if the array reference is not
5658 the last reference. */
5659 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5660 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
5663 gcc_assert (ref
->type
== REF_ARRAY
);
5665 /* Grab the start expressions from the array ref and
5666 copy them into actual arguments. */
5667 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
5669 arg
= gfc_get_actual_arglist ();
5670 arg
->expr
= gfc_copy_expr (ref
->u
.ar
.start
[n
]);
5671 if (e
->value
.function
.actual
== NULL
)
5672 tail
= e
->value
.function
.actual
= arg
;
5680 /* Dump the reference list and set the rank. */
5681 gfc_free_ref_list (e
->ref
);
5683 e
->rank
= sym
->as
? sym
->as
->rank
: 0;
5686 gfc_resolve_expr (e
);
5690 /* This might have changed! */
5691 return e
->expr_type
== EXPR_FUNCTION
;
5696 gfc_resolve_character_operator (gfc_expr
*e
)
5698 gfc_expr
*op1
= e
->value
.op
.op1
;
5699 gfc_expr
*op2
= e
->value
.op
.op2
;
5700 gfc_expr
*e1
= NULL
;
5701 gfc_expr
*e2
= NULL
;
5703 gcc_assert (e
->value
.op
.op
== INTRINSIC_CONCAT
);
5705 if (op1
->ts
.u
.cl
&& op1
->ts
.u
.cl
->length
)
5706 e1
= gfc_copy_expr (op1
->ts
.u
.cl
->length
);
5707 else if (op1
->expr_type
== EXPR_CONSTANT
)
5708 e1
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5709 op1
->value
.character
.length
);
5711 if (op2
->ts
.u
.cl
&& op2
->ts
.u
.cl
->length
)
5712 e2
= gfc_copy_expr (op2
->ts
.u
.cl
->length
);
5713 else if (op2
->expr_type
== EXPR_CONSTANT
)
5714 e2
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5715 op2
->value
.character
.length
);
5717 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5727 e
->ts
.u
.cl
->length
= gfc_add (e1
, e2
);
5728 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5729 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5730 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 0);
5731 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5737 /* Ensure that an character expression has a charlen and, if possible, a
5738 length expression. */
5741 fixup_charlen (gfc_expr
*e
)
5743 /* The cases fall through so that changes in expression type and the need
5744 for multiple fixes are picked up. In all circumstances, a charlen should
5745 be available for the middle end to hang a backend_decl on. */
5746 switch (e
->expr_type
)
5749 gfc_resolve_character_operator (e
);
5753 if (e
->expr_type
== EXPR_ARRAY
)
5754 gfc_resolve_character_array_constructor (e
);
5757 case EXPR_SUBSTRING
:
5758 if (!e
->ts
.u
.cl
&& e
->ref
)
5759 gfc_resolve_substring_charlen (e
);
5764 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5771 /* Update an actual argument to include the passed-object for type-bound
5772 procedures at the right position. */
5774 static gfc_actual_arglist
*
5775 update_arglist_pass (gfc_actual_arglist
* lst
, gfc_expr
* po
, unsigned argpos
,
5778 gcc_assert (argpos
> 0);
5782 gfc_actual_arglist
* result
;
5784 result
= gfc_get_actual_arglist ();
5788 result
->name
= name
;
5794 lst
->next
= update_arglist_pass (lst
->next
, po
, argpos
- 1, name
);
5796 lst
= update_arglist_pass (NULL
, po
, argpos
- 1, name
);
5801 /* Extract the passed-object from an EXPR_COMPCALL (a copy of it). */
5804 extract_compcall_passed_object (gfc_expr
* e
)
5808 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
5810 if (e
->value
.compcall
.base_object
)
5811 po
= gfc_copy_expr (e
->value
.compcall
.base_object
);
5814 po
= gfc_get_expr ();
5815 po
->expr_type
= EXPR_VARIABLE
;
5816 po
->symtree
= e
->symtree
;
5817 po
->ref
= gfc_copy_ref (e
->ref
);
5818 po
->where
= e
->where
;
5821 if (!gfc_resolve_expr (po
))
5828 /* Update the arglist of an EXPR_COMPCALL expression to include the
5832 update_compcall_arglist (gfc_expr
* e
)
5835 gfc_typebound_proc
* tbp
;
5837 tbp
= e
->value
.compcall
.tbp
;
5842 po
= extract_compcall_passed_object (e
);
5846 if (tbp
->nopass
|| e
->value
.compcall
.ignore_pass
)
5852 if (tbp
->pass_arg_num
<= 0)
5855 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
5863 /* Extract the passed object from a PPC call (a copy of it). */
5866 extract_ppc_passed_object (gfc_expr
*e
)
5871 po
= gfc_get_expr ();
5872 po
->expr_type
= EXPR_VARIABLE
;
5873 po
->symtree
= e
->symtree
;
5874 po
->ref
= gfc_copy_ref (e
->ref
);
5875 po
->where
= e
->where
;
5877 /* Remove PPC reference. */
5879 while ((*ref
)->next
)
5880 ref
= &(*ref
)->next
;
5881 gfc_free_ref_list (*ref
);
5884 if (!gfc_resolve_expr (po
))
5891 /* Update the actual arglist of a procedure pointer component to include the
5895 update_ppc_arglist (gfc_expr
* e
)
5899 gfc_typebound_proc
* tb
;
5901 ppc
= gfc_get_proc_ptr_comp (e
);
5909 else if (tb
->nopass
)
5912 po
= extract_ppc_passed_object (e
);
5919 gfc_error ("Passed-object at %L must be scalar", &e
->where
);
5924 if (po
->ts
.type
== BT_DERIVED
&& po
->ts
.u
.derived
->attr
.abstract
)
5926 gfc_error ("Base object for procedure-pointer component call at %L is of"
5927 " ABSTRACT type %qs", &e
->where
, po
->ts
.u
.derived
->name
);
5931 gcc_assert (tb
->pass_arg_num
> 0);
5932 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
5940 /* Check that the object a TBP is called on is valid, i.e. it must not be
5941 of ABSTRACT type (as in subobject%abstract_parent%tbp()). */
5944 check_typebound_baseobject (gfc_expr
* e
)
5947 bool return_value
= false;
5949 base
= extract_compcall_passed_object (e
);
5953 gcc_assert (base
->ts
.type
== BT_DERIVED
|| base
->ts
.type
== BT_CLASS
);
5955 if (base
->ts
.type
== BT_CLASS
&& !gfc_expr_attr (base
).class_ok
)
5959 if (base
->ts
.type
== BT_DERIVED
&& base
->ts
.u
.derived
->attr
.abstract
)
5961 gfc_error ("Base object for type-bound procedure call at %L is of"
5962 " ABSTRACT type %qs", &e
->where
, base
->ts
.u
.derived
->name
);
5966 /* F08:C1230. If the procedure called is NOPASS,
5967 the base object must be scalar. */
5968 if (e
->value
.compcall
.tbp
->nopass
&& base
->rank
!= 0)
5970 gfc_error ("Base object for NOPASS type-bound procedure call at %L must"
5971 " be scalar", &e
->where
);
5975 return_value
= true;
5978 gfc_free_expr (base
);
5979 return return_value
;
5983 /* Resolve a call to a type-bound procedure, either function or subroutine,
5984 statically from the data in an EXPR_COMPCALL expression. The adapted
5985 arglist and the target-procedure symtree are returned. */
5988 resolve_typebound_static (gfc_expr
* e
, gfc_symtree
** target
,
5989 gfc_actual_arglist
** actual
)
5991 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
5992 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
5994 /* Update the actual arglist for PASS. */
5995 if (!update_compcall_arglist (e
))
5998 *actual
= e
->value
.compcall
.actual
;
5999 *target
= e
->value
.compcall
.tbp
->u
.specific
;
6001 gfc_free_ref_list (e
->ref
);
6003 e
->value
.compcall
.actual
= NULL
;
6005 /* If we find a deferred typebound procedure, check for derived types
6006 that an overriding typebound procedure has not been missed. */
6007 if (e
->value
.compcall
.name
6008 && !e
->value
.compcall
.tbp
->non_overridable
6009 && e
->value
.compcall
.base_object
6010 && e
->value
.compcall
.base_object
->ts
.type
== BT_DERIVED
)
6013 gfc_symbol
*derived
;
6015 /* Use the derived type of the base_object. */
6016 derived
= e
->value
.compcall
.base_object
->ts
.u
.derived
;
6019 /* If necessary, go through the inheritance chain. */
6020 while (!st
&& derived
)
6022 /* Look for the typebound procedure 'name'. */
6023 if (derived
->f2k_derived
&& derived
->f2k_derived
->tb_sym_root
)
6024 st
= gfc_find_symtree (derived
->f2k_derived
->tb_sym_root
,
6025 e
->value
.compcall
.name
);
6027 derived
= gfc_get_derived_super_type (derived
);
6030 /* Now find the specific name in the derived type namespace. */
6031 if (st
&& st
->n
.tb
&& st
->n
.tb
->u
.specific
)
6032 gfc_find_sym_tree (st
->n
.tb
->u
.specific
->name
,
6033 derived
->ns
, 1, &st
);
6041 /* Get the ultimate declared type from an expression. In addition,
6042 return the last class/derived type reference and the copy of the
6043 reference list. If check_types is set true, derived types are
6044 identified as well as class references. */
6046 get_declared_from_expr (gfc_ref
**class_ref
, gfc_ref
**new_ref
,
6047 gfc_expr
*e
, bool check_types
)
6049 gfc_symbol
*declared
;
6056 *new_ref
= gfc_copy_ref (e
->ref
);
6058 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
6060 if (ref
->type
!= REF_COMPONENT
)
6063 if ((ref
->u
.c
.component
->ts
.type
== BT_CLASS
6064 || (check_types
&& gfc_bt_struct (ref
->u
.c
.component
->ts
.type
)))
6065 && ref
->u
.c
.component
->attr
.flavor
!= FL_PROCEDURE
)
6067 declared
= ref
->u
.c
.component
->ts
.u
.derived
;
6073 if (declared
== NULL
)
6074 declared
= e
->symtree
->n
.sym
->ts
.u
.derived
;
6080 /* Given an EXPR_COMPCALL calling a GENERIC typebound procedure, figure out
6081 which of the specific bindings (if any) matches the arglist and transform
6082 the expression into a call of that binding. */
6085 resolve_typebound_generic_call (gfc_expr
* e
, const char **name
)
6087 gfc_typebound_proc
* genproc
;
6088 const char* genname
;
6090 gfc_symbol
*derived
;
6092 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6093 genname
= e
->value
.compcall
.name
;
6094 genproc
= e
->value
.compcall
.tbp
;
6096 if (!genproc
->is_generic
)
6099 /* Try the bindings on this type and in the inheritance hierarchy. */
6100 for (; genproc
; genproc
= genproc
->overridden
)
6104 gcc_assert (genproc
->is_generic
);
6105 for (g
= genproc
->u
.generic
; g
; g
= g
->next
)
6108 gfc_actual_arglist
* args
;
6111 gcc_assert (g
->specific
);
6113 if (g
->specific
->error
)
6116 target
= g
->specific
->u
.specific
->n
.sym
;
6118 /* Get the right arglist by handling PASS/NOPASS. */
6119 args
= gfc_copy_actual_arglist (e
->value
.compcall
.actual
);
6120 if (!g
->specific
->nopass
)
6123 po
= extract_compcall_passed_object (e
);
6126 gfc_free_actual_arglist (args
);
6130 gcc_assert (g
->specific
->pass_arg_num
> 0);
6131 gcc_assert (!g
->specific
->error
);
6132 args
= update_arglist_pass (args
, po
, g
->specific
->pass_arg_num
,
6133 g
->specific
->pass_arg
);
6135 resolve_actual_arglist (args
, target
->attr
.proc
,
6136 is_external_proc (target
)
6137 && gfc_sym_get_dummy_args (target
) == NULL
);
6139 /* Check if this arglist matches the formal. */
6140 matches
= gfc_arglist_matches_symbol (&args
, target
);
6142 /* Clean up and break out of the loop if we've found it. */
6143 gfc_free_actual_arglist (args
);
6146 e
->value
.compcall
.tbp
= g
->specific
;
6147 genname
= g
->specific_st
->name
;
6148 /* Pass along the name for CLASS methods, where the vtab
6149 procedure pointer component has to be referenced. */
6157 /* Nothing matching found! */
6158 gfc_error ("Found no matching specific binding for the call to the GENERIC"
6159 " %qs at %L", genname
, &e
->where
);
6163 /* Make sure that we have the right specific instance for the name. */
6164 derived
= get_declared_from_expr (NULL
, NULL
, e
, true);
6166 st
= gfc_find_typebound_proc (derived
, NULL
, genname
, true, &e
->where
);
6168 e
->value
.compcall
.tbp
= st
->n
.tb
;
6174 /* Resolve a call to a type-bound subroutine. */
6177 resolve_typebound_call (gfc_code
* c
, const char **name
, bool *overridable
)
6179 gfc_actual_arglist
* newactual
;
6180 gfc_symtree
* target
;
6182 /* Check that's really a SUBROUTINE. */
6183 if (!c
->expr1
->value
.compcall
.tbp
->subroutine
)
6185 gfc_error ("%qs at %L should be a SUBROUTINE",
6186 c
->expr1
->value
.compcall
.name
, &c
->loc
);
6190 if (!check_typebound_baseobject (c
->expr1
))
6193 /* Pass along the name for CLASS methods, where the vtab
6194 procedure pointer component has to be referenced. */
6196 *name
= c
->expr1
->value
.compcall
.name
;
6198 if (!resolve_typebound_generic_call (c
->expr1
, name
))
6201 /* Pass along the NON_OVERRIDABLE attribute of the specific TBP. */
6203 *overridable
= !c
->expr1
->value
.compcall
.tbp
->non_overridable
;
6205 /* Transform into an ordinary EXEC_CALL for now. */
6207 if (!resolve_typebound_static (c
->expr1
, &target
, &newactual
))
6210 c
->ext
.actual
= newactual
;
6211 c
->symtree
= target
;
6212 c
->op
= (c
->expr1
->value
.compcall
.assign
? EXEC_ASSIGN_CALL
: EXEC_CALL
);
6214 gcc_assert (!c
->expr1
->ref
&& !c
->expr1
->value
.compcall
.actual
);
6216 gfc_free_expr (c
->expr1
);
6217 c
->expr1
= gfc_get_expr ();
6218 c
->expr1
->expr_type
= EXPR_FUNCTION
;
6219 c
->expr1
->symtree
= target
;
6220 c
->expr1
->where
= c
->loc
;
6222 return resolve_call (c
);
6226 /* Resolve a component-call expression. */
6228 resolve_compcall (gfc_expr
* e
, const char **name
)
6230 gfc_actual_arglist
* newactual
;
6231 gfc_symtree
* target
;
6233 /* Check that's really a FUNCTION. */
6234 if (!e
->value
.compcall
.tbp
->function
)
6236 gfc_error ("%qs at %L should be a FUNCTION",
6237 e
->value
.compcall
.name
, &e
->where
);
6241 /* These must not be assign-calls! */
6242 gcc_assert (!e
->value
.compcall
.assign
);
6244 if (!check_typebound_baseobject (e
))
6247 /* Pass along the name for CLASS methods, where the vtab
6248 procedure pointer component has to be referenced. */
6250 *name
= e
->value
.compcall
.name
;
6252 if (!resolve_typebound_generic_call (e
, name
))
6254 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6256 /* Take the rank from the function's symbol. */
6257 if (e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
)
6258 e
->rank
= e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
->rank
;
6260 /* For now, we simply transform it into an EXPR_FUNCTION call with the same
6261 arglist to the TBP's binding target. */
6263 if (!resolve_typebound_static (e
, &target
, &newactual
))
6266 e
->value
.function
.actual
= newactual
;
6267 e
->value
.function
.name
= NULL
;
6268 e
->value
.function
.esym
= target
->n
.sym
;
6269 e
->value
.function
.isym
= NULL
;
6270 e
->symtree
= target
;
6271 e
->ts
= target
->n
.sym
->ts
;
6272 e
->expr_type
= EXPR_FUNCTION
;
6274 /* Resolution is not necessary if this is a class subroutine; this
6275 function only has to identify the specific proc. Resolution of
6276 the call will be done next in resolve_typebound_call. */
6277 return gfc_resolve_expr (e
);
6281 static bool resolve_fl_derived (gfc_symbol
*sym
);
6284 /* Resolve a typebound function, or 'method'. First separate all
6285 the non-CLASS references by calling resolve_compcall directly. */
6288 resolve_typebound_function (gfc_expr
* e
)
6290 gfc_symbol
*declared
;
6302 /* Deal with typebound operators for CLASS objects. */
6303 expr
= e
->value
.compcall
.base_object
;
6304 overridable
= !e
->value
.compcall
.tbp
->non_overridable
;
6305 if (expr
&& expr
->ts
.type
== BT_CLASS
&& e
->value
.compcall
.name
)
6307 /* If the base_object is not a variable, the corresponding actual
6308 argument expression must be stored in e->base_expression so
6309 that the corresponding tree temporary can be used as the base
6310 object in gfc_conv_procedure_call. */
6311 if (expr
->expr_type
!= EXPR_VARIABLE
)
6313 gfc_actual_arglist
*args
;
6315 for (args
= e
->value
.function
.actual
; args
; args
= args
->next
)
6317 if (expr
== args
->expr
)
6322 /* Since the typebound operators are generic, we have to ensure
6323 that any delays in resolution are corrected and that the vtab
6326 declared
= ts
.u
.derived
;
6327 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6328 if (c
->ts
.u
.derived
== NULL
)
6329 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6331 if (!resolve_compcall (e
, &name
))
6334 /* Use the generic name if it is there. */
6335 name
= name
? name
: e
->value
.function
.esym
->name
;
6336 e
->symtree
= expr
->symtree
;
6337 e
->ref
= gfc_copy_ref (expr
->ref
);
6338 get_declared_from_expr (&class_ref
, NULL
, e
, false);
6340 /* Trim away the extraneous references that emerge from nested
6341 use of interface.c (extend_expr). */
6342 if (class_ref
&& class_ref
->next
)
6344 gfc_free_ref_list (class_ref
->next
);
6345 class_ref
->next
= NULL
;
6347 else if (e
->ref
&& !class_ref
&& expr
->ts
.type
!= BT_CLASS
)
6349 gfc_free_ref_list (e
->ref
);
6353 gfc_add_vptr_component (e
);
6354 gfc_add_component_ref (e
, name
);
6355 e
->value
.function
.esym
= NULL
;
6356 if (expr
->expr_type
!= EXPR_VARIABLE
)
6357 e
->base_expr
= expr
;
6362 return resolve_compcall (e
, NULL
);
6364 if (!resolve_ref (e
))
6367 /* Get the CLASS declared type. */
6368 declared
= get_declared_from_expr (&class_ref
, &new_ref
, e
, true);
6370 if (!resolve_fl_derived (declared
))
6373 /* Weed out cases of the ultimate component being a derived type. */
6374 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6375 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6377 gfc_free_ref_list (new_ref
);
6378 return resolve_compcall (e
, NULL
);
6381 c
= gfc_find_component (declared
, "_data", true, true, NULL
);
6382 declared
= c
->ts
.u
.derived
;
6384 /* Treat the call as if it is a typebound procedure, in order to roll
6385 out the correct name for the specific function. */
6386 if (!resolve_compcall (e
, &name
))
6388 gfc_free_ref_list (new_ref
);
6395 /* Convert the expression to a procedure pointer component call. */
6396 e
->value
.function
.esym
= NULL
;
6402 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6403 gfc_add_vptr_component (e
);
6404 gfc_add_component_ref (e
, name
);
6406 /* Recover the typespec for the expression. This is really only
6407 necessary for generic procedures, where the additional call
6408 to gfc_add_component_ref seems to throw the collection of the
6409 correct typespec. */
6413 gfc_free_ref_list (new_ref
);
6418 /* Resolve a typebound subroutine, or 'method'. First separate all
6419 the non-CLASS references by calling resolve_typebound_call
6423 resolve_typebound_subroutine (gfc_code
*code
)
6425 gfc_symbol
*declared
;
6435 st
= code
->expr1
->symtree
;
6437 /* Deal with typebound operators for CLASS objects. */
6438 expr
= code
->expr1
->value
.compcall
.base_object
;
6439 overridable
= !code
->expr1
->value
.compcall
.tbp
->non_overridable
;
6440 if (expr
&& expr
->ts
.type
== BT_CLASS
&& code
->expr1
->value
.compcall
.name
)
6442 /* If the base_object is not a variable, the corresponding actual
6443 argument expression must be stored in e->base_expression so
6444 that the corresponding tree temporary can be used as the base
6445 object in gfc_conv_procedure_call. */
6446 if (expr
->expr_type
!= EXPR_VARIABLE
)
6448 gfc_actual_arglist
*args
;
6450 args
= code
->expr1
->value
.function
.actual
;
6451 for (; args
; args
= args
->next
)
6452 if (expr
== args
->expr
)
6456 /* Since the typebound operators are generic, we have to ensure
6457 that any delays in resolution are corrected and that the vtab
6459 declared
= expr
->ts
.u
.derived
;
6460 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6461 if (c
->ts
.u
.derived
== NULL
)
6462 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6464 if (!resolve_typebound_call (code
, &name
, NULL
))
6467 /* Use the generic name if it is there. */
6468 name
= name
? name
: code
->expr1
->value
.function
.esym
->name
;
6469 code
->expr1
->symtree
= expr
->symtree
;
6470 code
->expr1
->ref
= gfc_copy_ref (expr
->ref
);
6472 /* Trim away the extraneous references that emerge from nested
6473 use of interface.c (extend_expr). */
6474 get_declared_from_expr (&class_ref
, NULL
, code
->expr1
, false);
6475 if (class_ref
&& class_ref
->next
)
6477 gfc_free_ref_list (class_ref
->next
);
6478 class_ref
->next
= NULL
;
6480 else if (code
->expr1
->ref
&& !class_ref
)
6482 gfc_free_ref_list (code
->expr1
->ref
);
6483 code
->expr1
->ref
= NULL
;
6486 /* Now use the procedure in the vtable. */
6487 gfc_add_vptr_component (code
->expr1
);
6488 gfc_add_component_ref (code
->expr1
, name
);
6489 code
->expr1
->value
.function
.esym
= NULL
;
6490 if (expr
->expr_type
!= EXPR_VARIABLE
)
6491 code
->expr1
->base_expr
= expr
;
6496 return resolve_typebound_call (code
, NULL
, NULL
);
6498 if (!resolve_ref (code
->expr1
))
6501 /* Get the CLASS declared type. */
6502 get_declared_from_expr (&class_ref
, &new_ref
, code
->expr1
, true);
6504 /* Weed out cases of the ultimate component being a derived type. */
6505 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6506 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6508 gfc_free_ref_list (new_ref
);
6509 return resolve_typebound_call (code
, NULL
, NULL
);
6512 if (!resolve_typebound_call (code
, &name
, &overridable
))
6514 gfc_free_ref_list (new_ref
);
6517 ts
= code
->expr1
->ts
;
6521 /* Convert the expression to a procedure pointer component call. */
6522 code
->expr1
->value
.function
.esym
= NULL
;
6523 code
->expr1
->symtree
= st
;
6526 code
->expr1
->ref
= new_ref
;
6528 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6529 gfc_add_vptr_component (code
->expr1
);
6530 gfc_add_component_ref (code
->expr1
, name
);
6532 /* Recover the typespec for the expression. This is really only
6533 necessary for generic procedures, where the additional call
6534 to gfc_add_component_ref seems to throw the collection of the
6535 correct typespec. */
6536 code
->expr1
->ts
= ts
;
6539 gfc_free_ref_list (new_ref
);
6545 /* Resolve a CALL to a Procedure Pointer Component (Subroutine). */
6548 resolve_ppc_call (gfc_code
* c
)
6550 gfc_component
*comp
;
6552 comp
= gfc_get_proc_ptr_comp (c
->expr1
);
6553 gcc_assert (comp
!= NULL
);
6555 c
->resolved_sym
= c
->expr1
->symtree
->n
.sym
;
6556 c
->expr1
->expr_type
= EXPR_VARIABLE
;
6558 if (!comp
->attr
.subroutine
)
6559 gfc_add_subroutine (&comp
->attr
, comp
->name
, &c
->expr1
->where
);
6561 if (!resolve_ref (c
->expr1
))
6564 if (!update_ppc_arglist (c
->expr1
))
6567 c
->ext
.actual
= c
->expr1
->value
.compcall
.actual
;
6569 if (!resolve_actual_arglist (c
->ext
.actual
, comp
->attr
.proc
,
6570 !(comp
->ts
.interface
6571 && comp
->ts
.interface
->formal
)))
6574 if (!pure_subroutine (comp
->ts
.interface
, comp
->name
, &c
->expr1
->where
))
6577 gfc_ppc_use (comp
, &c
->expr1
->value
.compcall
.actual
, &c
->expr1
->where
);
6583 /* Resolve a Function Call to a Procedure Pointer Component (Function). */
6586 resolve_expr_ppc (gfc_expr
* e
)
6588 gfc_component
*comp
;
6590 comp
= gfc_get_proc_ptr_comp (e
);
6591 gcc_assert (comp
!= NULL
);
6593 /* Convert to EXPR_FUNCTION. */
6594 e
->expr_type
= EXPR_FUNCTION
;
6595 e
->value
.function
.isym
= NULL
;
6596 e
->value
.function
.actual
= e
->value
.compcall
.actual
;
6598 if (comp
->as
!= NULL
)
6599 e
->rank
= comp
->as
->rank
;
6601 if (!comp
->attr
.function
)
6602 gfc_add_function (&comp
->attr
, comp
->name
, &e
->where
);
6604 if (!resolve_ref (e
))
6607 if (!resolve_actual_arglist (e
->value
.function
.actual
, comp
->attr
.proc
,
6608 !(comp
->ts
.interface
6609 && comp
->ts
.interface
->formal
)))
6612 if (!update_ppc_arglist (e
))
6615 if (!check_pure_function(e
))
6618 gfc_ppc_use (comp
, &e
->value
.compcall
.actual
, &e
->where
);
6625 gfc_is_expandable_expr (gfc_expr
*e
)
6627 gfc_constructor
*con
;
6629 if (e
->expr_type
== EXPR_ARRAY
)
6631 /* Traverse the constructor looking for variables that are flavor
6632 parameter. Parameters must be expanded since they are fully used at
6634 con
= gfc_constructor_first (e
->value
.constructor
);
6635 for (; con
; con
= gfc_constructor_next (con
))
6637 if (con
->expr
->expr_type
== EXPR_VARIABLE
6638 && con
->expr
->symtree
6639 && (con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
6640 || con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_VARIABLE
))
6642 if (con
->expr
->expr_type
== EXPR_ARRAY
6643 && gfc_is_expandable_expr (con
->expr
))
6652 /* Sometimes variables in specification expressions of the result
6653 of module procedures in submodules wind up not being the 'real'
6654 dummy. Find this, if possible, in the namespace of the first
6658 fixup_unique_dummy (gfc_expr
*e
)
6660 gfc_symtree
*st
= NULL
;
6661 gfc_symbol
*s
= NULL
;
6663 if (e
->symtree
->n
.sym
->ns
->proc_name
6664 && e
->symtree
->n
.sym
->ns
->proc_name
->formal
)
6665 s
= e
->symtree
->n
.sym
->ns
->proc_name
->formal
->sym
;
6668 st
= gfc_find_symtree (s
->ns
->sym_root
, e
->symtree
->n
.sym
->name
);
6671 && st
->n
.sym
!= NULL
6672 && st
->n
.sym
->attr
.dummy
)
6676 /* Resolve an expression. That is, make sure that types of operands agree
6677 with their operators, intrinsic operators are converted to function calls
6678 for overloaded types and unresolved function references are resolved. */
6681 gfc_resolve_expr (gfc_expr
*e
)
6684 bool inquiry_save
, actual_arg_save
, first_actual_arg_save
;
6689 /* inquiry_argument only applies to variables. */
6690 inquiry_save
= inquiry_argument
;
6691 actual_arg_save
= actual_arg
;
6692 first_actual_arg_save
= first_actual_arg
;
6694 if (e
->expr_type
!= EXPR_VARIABLE
)
6696 inquiry_argument
= false;
6698 first_actual_arg
= false;
6700 else if (e
->symtree
!= NULL
6701 && *e
->symtree
->name
== '@'
6702 && e
->symtree
->n
.sym
->attr
.dummy
)
6704 /* Deal with submodule specification expressions that are not
6705 found to be referenced in module.c(read_cleanup). */
6706 fixup_unique_dummy (e
);
6709 switch (e
->expr_type
)
6712 t
= resolve_operator (e
);
6718 if (check_host_association (e
))
6719 t
= resolve_function (e
);
6721 t
= resolve_variable (e
);
6723 if (e
->ts
.type
== BT_CHARACTER
&& e
->ts
.u
.cl
== NULL
&& e
->ref
6724 && e
->ref
->type
!= REF_SUBSTRING
)
6725 gfc_resolve_substring_charlen (e
);
6730 t
= resolve_typebound_function (e
);
6733 case EXPR_SUBSTRING
:
6734 t
= resolve_ref (e
);
6743 t
= resolve_expr_ppc (e
);
6748 if (!resolve_ref (e
))
6751 t
= gfc_resolve_array_constructor (e
);
6752 /* Also try to expand a constructor. */
6755 expression_rank (e
);
6756 if (gfc_is_constant_expr (e
) || gfc_is_expandable_expr (e
))
6757 gfc_expand_constructor (e
, false);
6760 /* This provides the opportunity for the length of constructors with
6761 character valued function elements to propagate the string length
6762 to the expression. */
6763 if (t
&& e
->ts
.type
== BT_CHARACTER
)
6765 /* For efficiency, we call gfc_expand_constructor for BT_CHARACTER
6766 here rather then add a duplicate test for it above. */
6767 gfc_expand_constructor (e
, false);
6768 t
= gfc_resolve_character_array_constructor (e
);
6773 case EXPR_STRUCTURE
:
6774 t
= resolve_ref (e
);
6778 t
= resolve_structure_cons (e
, 0);
6782 t
= gfc_simplify_expr (e
, 0);
6786 gfc_internal_error ("gfc_resolve_expr(): Bad expression type");
6789 if (e
->ts
.type
== BT_CHARACTER
&& t
&& !e
->ts
.u
.cl
)
6792 inquiry_argument
= inquiry_save
;
6793 actual_arg
= actual_arg_save
;
6794 first_actual_arg
= first_actual_arg_save
;
6800 /* Resolve an expression from an iterator. They must be scalar and have
6801 INTEGER or (optionally) REAL type. */
6804 gfc_resolve_iterator_expr (gfc_expr
*expr
, bool real_ok
,
6805 const char *name_msgid
)
6807 if (!gfc_resolve_expr (expr
))
6810 if (expr
->rank
!= 0)
6812 gfc_error ("%s at %L must be a scalar", _(name_msgid
), &expr
->where
);
6816 if (expr
->ts
.type
!= BT_INTEGER
)
6818 if (expr
->ts
.type
== BT_REAL
)
6821 return gfc_notify_std (GFC_STD_F95_DEL
,
6822 "%s at %L must be integer",
6823 _(name_msgid
), &expr
->where
);
6826 gfc_error ("%s at %L must be INTEGER", _(name_msgid
),
6833 gfc_error ("%s at %L must be INTEGER", _(name_msgid
), &expr
->where
);
6841 /* Resolve the expressions in an iterator structure. If REAL_OK is
6842 false allow only INTEGER type iterators, otherwise allow REAL types.
6843 Set own_scope to true for ac-implied-do and data-implied-do as those
6844 have a separate scope such that, e.g., a INTENT(IN) doesn't apply. */
6847 gfc_resolve_iterator (gfc_iterator
*iter
, bool real_ok
, bool own_scope
)
6849 if (!gfc_resolve_iterator_expr (iter
->var
, real_ok
, "Loop variable"))
6852 if (!gfc_check_vardef_context (iter
->var
, false, false, own_scope
,
6853 _("iterator variable")))
6856 if (!gfc_resolve_iterator_expr (iter
->start
, real_ok
,
6857 "Start expression in DO loop"))
6860 if (!gfc_resolve_iterator_expr (iter
->end
, real_ok
,
6861 "End expression in DO loop"))
6864 if (!gfc_resolve_iterator_expr (iter
->step
, real_ok
,
6865 "Step expression in DO loop"))
6868 if (iter
->step
->expr_type
== EXPR_CONSTANT
)
6870 if ((iter
->step
->ts
.type
== BT_INTEGER
6871 && mpz_cmp_ui (iter
->step
->value
.integer
, 0) == 0)
6872 || (iter
->step
->ts
.type
== BT_REAL
6873 && mpfr_sgn (iter
->step
->value
.real
) == 0))
6875 gfc_error ("Step expression in DO loop at %L cannot be zero",
6876 &iter
->step
->where
);
6881 /* Convert start, end, and step to the same type as var. */
6882 if (iter
->start
->ts
.kind
!= iter
->var
->ts
.kind
6883 || iter
->start
->ts
.type
!= iter
->var
->ts
.type
)
6884 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
6886 if (iter
->end
->ts
.kind
!= iter
->var
->ts
.kind
6887 || iter
->end
->ts
.type
!= iter
->var
->ts
.type
)
6888 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
6890 if (iter
->step
->ts
.kind
!= iter
->var
->ts
.kind
6891 || iter
->step
->ts
.type
!= iter
->var
->ts
.type
)
6892 gfc_convert_type (iter
->step
, &iter
->var
->ts
, 1);
6894 if (iter
->start
->expr_type
== EXPR_CONSTANT
6895 && iter
->end
->expr_type
== EXPR_CONSTANT
6896 && iter
->step
->expr_type
== EXPR_CONSTANT
)
6899 if (iter
->start
->ts
.type
== BT_INTEGER
)
6901 sgn
= mpz_cmp_ui (iter
->step
->value
.integer
, 0);
6902 cmp
= mpz_cmp (iter
->end
->value
.integer
, iter
->start
->value
.integer
);
6906 sgn
= mpfr_sgn (iter
->step
->value
.real
);
6907 cmp
= mpfr_cmp (iter
->end
->value
.real
, iter
->start
->value
.real
);
6909 if (warn_zerotrip
&& ((sgn
> 0 && cmp
< 0) || (sgn
< 0 && cmp
> 0)))
6910 gfc_warning (OPT_Wzerotrip
,
6911 "DO loop at %L will be executed zero times",
6912 &iter
->step
->where
);
6915 if (iter
->end
->expr_type
== EXPR_CONSTANT
6916 && iter
->end
->ts
.type
== BT_INTEGER
6917 && iter
->step
->expr_type
== EXPR_CONSTANT
6918 && iter
->step
->ts
.type
== BT_INTEGER
6919 && (mpz_cmp_si (iter
->step
->value
.integer
, -1L) == 0
6920 || mpz_cmp_si (iter
->step
->value
.integer
, 1L) == 0))
6922 bool is_step_positive
= mpz_cmp_ui (iter
->step
->value
.integer
, 1) == 0;
6923 int k
= gfc_validate_kind (BT_INTEGER
, iter
->end
->ts
.kind
, false);
6925 if (is_step_positive
6926 && mpz_cmp (iter
->end
->value
.integer
, gfc_integer_kinds
[k
].huge
) == 0)
6927 gfc_warning (OPT_Wundefined_do_loop
,
6928 "DO loop at %L is undefined as it overflows",
6929 &iter
->step
->where
);
6930 else if (!is_step_positive
6931 && mpz_cmp (iter
->end
->value
.integer
,
6932 gfc_integer_kinds
[k
].min_int
) == 0)
6933 gfc_warning (OPT_Wundefined_do_loop
,
6934 "DO loop at %L is undefined as it underflows",
6935 &iter
->step
->where
);
6942 /* Traversal function for find_forall_index. f == 2 signals that
6943 that variable itself is not to be checked - only the references. */
6946 forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int *f
)
6948 if (expr
->expr_type
!= EXPR_VARIABLE
)
6951 /* A scalar assignment */
6952 if (!expr
->ref
|| *f
== 1)
6954 if (expr
->symtree
->n
.sym
== sym
)
6966 /* Check whether the FORALL index appears in the expression or not.
6967 Returns true if SYM is found in EXPR. */
6970 find_forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int f
)
6972 if (gfc_traverse_expr (expr
, sym
, forall_index
, f
))
6979 /* Resolve a list of FORALL iterators. The FORALL index-name is constrained
6980 to be a scalar INTEGER variable. The subscripts and stride are scalar
6981 INTEGERs, and if stride is a constant it must be nonzero.
6982 Furthermore "A subscript or stride in a forall-triplet-spec shall
6983 not contain a reference to any index-name in the
6984 forall-triplet-spec-list in which it appears." (7.5.4.1) */
6987 resolve_forall_iterators (gfc_forall_iterator
*it
)
6989 gfc_forall_iterator
*iter
, *iter2
;
6991 for (iter
= it
; iter
; iter
= iter
->next
)
6993 if (gfc_resolve_expr (iter
->var
)
6994 && (iter
->var
->ts
.type
!= BT_INTEGER
|| iter
->var
->rank
!= 0))
6995 gfc_error ("FORALL index-name at %L must be a scalar INTEGER",
6998 if (gfc_resolve_expr (iter
->start
)
6999 && (iter
->start
->ts
.type
!= BT_INTEGER
|| iter
->start
->rank
!= 0))
7000 gfc_error ("FORALL start expression at %L must be a scalar INTEGER",
7001 &iter
->start
->where
);
7002 if (iter
->var
->ts
.kind
!= iter
->start
->ts
.kind
)
7003 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7005 if (gfc_resolve_expr (iter
->end
)
7006 && (iter
->end
->ts
.type
!= BT_INTEGER
|| iter
->end
->rank
!= 0))
7007 gfc_error ("FORALL end expression at %L must be a scalar INTEGER",
7009 if (iter
->var
->ts
.kind
!= iter
->end
->ts
.kind
)
7010 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7012 if (gfc_resolve_expr (iter
->stride
))
7014 if (iter
->stride
->ts
.type
!= BT_INTEGER
|| iter
->stride
->rank
!= 0)
7015 gfc_error ("FORALL stride expression at %L must be a scalar %s",
7016 &iter
->stride
->where
, "INTEGER");
7018 if (iter
->stride
->expr_type
== EXPR_CONSTANT
7019 && mpz_cmp_ui (iter
->stride
->value
.integer
, 0) == 0)
7020 gfc_error ("FORALL stride expression at %L cannot be zero",
7021 &iter
->stride
->where
);
7023 if (iter
->var
->ts
.kind
!= iter
->stride
->ts
.kind
)
7024 gfc_convert_type (iter
->stride
, &iter
->var
->ts
, 1);
7027 for (iter
= it
; iter
; iter
= iter
->next
)
7028 for (iter2
= iter
; iter2
; iter2
= iter2
->next
)
7030 if (find_forall_index (iter2
->start
, iter
->var
->symtree
->n
.sym
, 0)
7031 || find_forall_index (iter2
->end
, iter
->var
->symtree
->n
.sym
, 0)
7032 || find_forall_index (iter2
->stride
, iter
->var
->symtree
->n
.sym
, 0))
7033 gfc_error ("FORALL index %qs may not appear in triplet "
7034 "specification at %L", iter
->var
->symtree
->name
,
7035 &iter2
->start
->where
);
7040 /* Given a pointer to a symbol that is a derived type, see if it's
7041 inaccessible, i.e. if it's defined in another module and the components are
7042 PRIVATE. The search is recursive if necessary. Returns zero if no
7043 inaccessible components are found, nonzero otherwise. */
7046 derived_inaccessible (gfc_symbol
*sym
)
7050 if (sym
->attr
.use_assoc
&& sym
->attr
.private_comp
)
7053 for (c
= sym
->components
; c
; c
= c
->next
)
7055 /* Prevent an infinite loop through this function. */
7056 if (c
->ts
.type
== BT_DERIVED
&& c
->attr
.pointer
7057 && sym
== c
->ts
.u
.derived
)
7060 if (c
->ts
.type
== BT_DERIVED
&& derived_inaccessible (c
->ts
.u
.derived
))
7068 /* Resolve the argument of a deallocate expression. The expression must be
7069 a pointer or a full array. */
7072 resolve_deallocate_expr (gfc_expr
*e
)
7074 symbol_attribute attr
;
7075 int allocatable
, pointer
;
7081 if (!gfc_resolve_expr (e
))
7084 if (e
->expr_type
!= EXPR_VARIABLE
)
7087 sym
= e
->symtree
->n
.sym
;
7088 unlimited
= UNLIMITED_POLY(sym
);
7090 if (sym
->ts
.type
== BT_CLASS
)
7092 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7093 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7097 allocatable
= sym
->attr
.allocatable
;
7098 pointer
= sym
->attr
.pointer
;
7100 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7105 if (ref
->u
.ar
.type
!= AR_FULL
7106 && !(ref
->u
.ar
.type
== AR_ELEMENT
&& ref
->u
.ar
.as
->rank
== 0
7107 && ref
->u
.ar
.codimen
&& gfc_ref_this_image (ref
)))
7112 c
= ref
->u
.c
.component
;
7113 if (c
->ts
.type
== BT_CLASS
)
7115 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7116 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7120 allocatable
= c
->attr
.allocatable
;
7121 pointer
= c
->attr
.pointer
;
7131 attr
= gfc_expr_attr (e
);
7133 if (allocatable
== 0 && attr
.pointer
== 0 && !unlimited
)
7136 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7142 if (gfc_is_coindexed (e
))
7144 gfc_error ("Coindexed allocatable object at %L", &e
->where
);
7149 && !gfc_check_vardef_context (e
, true, true, false,
7150 _("DEALLOCATE object")))
7152 if (!gfc_check_vardef_context (e
, false, true, false,
7153 _("DEALLOCATE object")))
7160 /* Returns true if the expression e contains a reference to the symbol sym. */
7162 sym_in_expr (gfc_expr
*e
, gfc_symbol
*sym
, int *f ATTRIBUTE_UNUSED
)
7164 if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
== sym
)
7171 gfc_find_sym_in_expr (gfc_symbol
*sym
, gfc_expr
*e
)
7173 return gfc_traverse_expr (e
, sym
, sym_in_expr
, 0);
7177 /* Given the expression node e for an allocatable/pointer of derived type to be
7178 allocated, get the expression node to be initialized afterwards (needed for
7179 derived types with default initializers, and derived types with allocatable
7180 components that need nullification.) */
7183 gfc_expr_to_initialize (gfc_expr
*e
)
7189 result
= gfc_copy_expr (e
);
7191 /* Change the last array reference from AR_ELEMENT to AR_FULL. */
7192 for (ref
= result
->ref
; ref
; ref
= ref
->next
)
7193 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
7195 ref
->u
.ar
.type
= AR_FULL
;
7197 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
7198 ref
->u
.ar
.start
[i
] = ref
->u
.ar
.end
[i
] = ref
->u
.ar
.stride
[i
] = NULL
;
7203 gfc_free_shape (&result
->shape
, result
->rank
);
7205 /* Recalculate rank, shape, etc. */
7206 gfc_resolve_expr (result
);
7211 /* If the last ref of an expression is an array ref, return a copy of the
7212 expression with that one removed. Otherwise, a copy of the original
7213 expression. This is used for allocate-expressions and pointer assignment
7214 LHS, where there may be an array specification that needs to be stripped
7215 off when using gfc_check_vardef_context. */
7218 remove_last_array_ref (gfc_expr
* e
)
7223 e2
= gfc_copy_expr (e
);
7224 for (r
= &e2
->ref
; *r
; r
= &(*r
)->next
)
7225 if ((*r
)->type
== REF_ARRAY
&& !(*r
)->next
)
7227 gfc_free_ref_list (*r
);
7236 /* Used in resolve_allocate_expr to check that a allocation-object and
7237 a source-expr are conformable. This does not catch all possible
7238 cases; in particular a runtime checking is needed. */
7241 conformable_arrays (gfc_expr
*e1
, gfc_expr
*e2
)
7244 for (tail
= e2
->ref
; tail
&& tail
->next
; tail
= tail
->next
);
7246 /* First compare rank. */
7247 if ((tail
&& e1
->rank
!= tail
->u
.ar
.as
->rank
)
7248 || (!tail
&& e1
->rank
!= e2
->rank
))
7250 gfc_error ("Source-expr at %L must be scalar or have the "
7251 "same rank as the allocate-object at %L",
7252 &e1
->where
, &e2
->where
);
7263 for (i
= 0; i
< e1
->rank
; i
++)
7265 if (tail
->u
.ar
.start
[i
] == NULL
)
7268 if (tail
->u
.ar
.end
[i
])
7270 mpz_set (s
, tail
->u
.ar
.end
[i
]->value
.integer
);
7271 mpz_sub (s
, s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7272 mpz_add_ui (s
, s
, 1);
7276 mpz_set (s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7279 if (mpz_cmp (e1
->shape
[i
], s
) != 0)
7281 gfc_error ("Source-expr at %L and allocate-object at %L must "
7282 "have the same shape", &e1
->where
, &e2
->where
);
7295 /* Resolve the expression in an ALLOCATE statement, doing the additional
7296 checks to see whether the expression is OK or not. The expression must
7297 have a trailing array reference that gives the size of the array. */
7300 resolve_allocate_expr (gfc_expr
*e
, gfc_code
*code
, bool *array_alloc_wo_spec
)
7302 int i
, pointer
, allocatable
, dimension
, is_abstract
;
7306 symbol_attribute attr
;
7307 gfc_ref
*ref
, *ref2
;
7310 gfc_symbol
*sym
= NULL
;
7315 /* Mark the utmost array component as being in allocate to allow DIMEN_STAR
7316 checking of coarrays. */
7317 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7318 if (ref
->next
== NULL
)
7321 if (ref
&& ref
->type
== REF_ARRAY
)
7322 ref
->u
.ar
.in_allocate
= true;
7324 if (!gfc_resolve_expr (e
))
7327 /* Make sure the expression is allocatable or a pointer. If it is
7328 pointer, the next-to-last reference must be a pointer. */
7332 sym
= e
->symtree
->n
.sym
;
7334 /* Check whether ultimate component is abstract and CLASS. */
7337 /* Is the allocate-object unlimited polymorphic? */
7338 unlimited
= UNLIMITED_POLY(e
);
7340 if (e
->expr_type
!= EXPR_VARIABLE
)
7343 attr
= gfc_expr_attr (e
);
7344 pointer
= attr
.pointer
;
7345 dimension
= attr
.dimension
;
7346 codimension
= attr
.codimension
;
7350 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
))
7352 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7353 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7354 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
7355 codimension
= CLASS_DATA (sym
)->attr
.codimension
;
7356 is_abstract
= CLASS_DATA (sym
)->attr
.abstract
;
7360 allocatable
= sym
->attr
.allocatable
;
7361 pointer
= sym
->attr
.pointer
;
7362 dimension
= sym
->attr
.dimension
;
7363 codimension
= sym
->attr
.codimension
;
7368 for (ref
= e
->ref
; ref
; ref2
= ref
, ref
= ref
->next
)
7373 if (ref
->u
.ar
.codimen
> 0)
7376 for (n
= ref
->u
.ar
.dimen
;
7377 n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
7378 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_THIS_IMAGE
)
7385 if (ref
->next
!= NULL
)
7393 gfc_error ("Coindexed allocatable object at %L",
7398 c
= ref
->u
.c
.component
;
7399 if (c
->ts
.type
== BT_CLASS
)
7401 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7402 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7403 dimension
= CLASS_DATA (c
)->attr
.dimension
;
7404 codimension
= CLASS_DATA (c
)->attr
.codimension
;
7405 is_abstract
= CLASS_DATA (c
)->attr
.abstract
;
7409 allocatable
= c
->attr
.allocatable
;
7410 pointer
= c
->attr
.pointer
;
7411 dimension
= c
->attr
.dimension
;
7412 codimension
= c
->attr
.codimension
;
7413 is_abstract
= c
->attr
.abstract
;
7425 /* Check for F08:C628. */
7426 if (allocatable
== 0 && pointer
== 0 && !unlimited
)
7428 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7433 /* Some checks for the SOURCE tag. */
7436 /* Check F03:C631. */
7437 if (!gfc_type_compatible (&e
->ts
, &code
->expr3
->ts
))
7439 gfc_error ("Type of entity at %L is type incompatible with "
7440 "source-expr at %L", &e
->where
, &code
->expr3
->where
);
7444 /* Check F03:C632 and restriction following Note 6.18. */
7445 if (code
->expr3
->rank
> 0 && !conformable_arrays (code
->expr3
, e
))
7448 /* Check F03:C633. */
7449 if (code
->expr3
->ts
.kind
!= e
->ts
.kind
&& !unlimited
)
7451 gfc_error ("The allocate-object at %L and the source-expr at %L "
7452 "shall have the same kind type parameter",
7453 &e
->where
, &code
->expr3
->where
);
7457 /* Check F2008, C642. */
7458 if (code
->expr3
->ts
.type
== BT_DERIVED
7459 && ((codimension
&& gfc_expr_attr (code
->expr3
).lock_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_LOCK_TYPE
)))
7465 gfc_error ("The source-expr at %L shall neither be of type "
7466 "LOCK_TYPE nor have a LOCK_TYPE component if "
7467 "allocate-object at %L is a coarray",
7468 &code
->expr3
->where
, &e
->where
);
7472 /* Check TS18508, C702/C703. */
7473 if (code
->expr3
->ts
.type
== BT_DERIVED
7474 && ((codimension
&& gfc_expr_attr (code
->expr3
).event_comp
)
7475 || (code
->expr3
->ts
.u
.derived
->from_intmod
7476 == INTMOD_ISO_FORTRAN_ENV
7477 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7478 == ISOFORTRAN_EVENT_TYPE
)))
7480 gfc_error ("The source-expr at %L shall neither be of type "
7481 "EVENT_TYPE nor have a EVENT_TYPE component if "
7482 "allocate-object at %L is a coarray",
7483 &code
->expr3
->where
, &e
->where
);
7488 /* Check F08:C629. */
7489 if (is_abstract
&& code
->ext
.alloc
.ts
.type
== BT_UNKNOWN
7492 gcc_assert (e
->ts
.type
== BT_CLASS
);
7493 gfc_error ("Allocating %s of ABSTRACT base type at %L requires a "
7494 "type-spec or source-expr", sym
->name
, &e
->where
);
7498 /* Check F08:C632. */
7499 if (code
->ext
.alloc
.ts
.type
== BT_CHARACTER
&& !e
->ts
.deferred
7500 && !UNLIMITED_POLY (e
))
7504 if (!e
->ts
.u
.cl
->length
)
7507 cmp
= gfc_dep_compare_expr (e
->ts
.u
.cl
->length
,
7508 code
->ext
.alloc
.ts
.u
.cl
->length
);
7509 if (cmp
== 1 || cmp
== -1 || cmp
== -3)
7511 gfc_error ("Allocating %s at %L with type-spec requires the same "
7512 "character-length parameter as in the declaration",
7513 sym
->name
, &e
->where
);
7518 /* In the variable definition context checks, gfc_expr_attr is used
7519 on the expression. This is fooled by the array specification
7520 present in e, thus we have to eliminate that one temporarily. */
7521 e2
= remove_last_array_ref (e
);
7524 t
= gfc_check_vardef_context (e2
, true, true, false,
7525 _("ALLOCATE object"));
7527 t
= gfc_check_vardef_context (e2
, false, true, false,
7528 _("ALLOCATE object"));
7533 if (e
->ts
.type
== BT_CLASS
&& CLASS_DATA (e
)->attr
.dimension
7534 && !code
->expr3
&& code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7536 /* For class arrays, the initialization with SOURCE is done
7537 using _copy and trans_call. It is convenient to exploit that
7538 when the allocated type is different from the declared type but
7539 no SOURCE exists by setting expr3. */
7540 code
->expr3
= gfc_default_initializer (&code
->ext
.alloc
.ts
);
7542 else if (flag_coarray
!= GFC_FCOARRAY_LIB
&& e
->ts
.type
== BT_DERIVED
7543 && e
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
7544 && e
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
7546 /* We have to zero initialize the integer variable. */
7547 code
->expr3
= gfc_get_int_expr (gfc_default_integer_kind
, &e
->where
, 0);
7550 if (e
->ts
.type
== BT_CLASS
&& !unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7552 /* Make sure the vtab symbol is present when
7553 the module variables are generated. */
7554 gfc_typespec ts
= e
->ts
;
7556 ts
= code
->expr3
->ts
;
7557 else if (code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7558 ts
= code
->ext
.alloc
.ts
;
7560 /* Finding the vtab also publishes the type's symbol. Therefore this
7561 statement is necessary. */
7562 gfc_find_derived_vtab (ts
.u
.derived
);
7564 else if (unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7566 /* Again, make sure the vtab symbol is present when
7567 the module variables are generated. */
7568 gfc_typespec
*ts
= NULL
;
7570 ts
= &code
->expr3
->ts
;
7572 ts
= &code
->ext
.alloc
.ts
;
7576 /* Finding the vtab also publishes the type's symbol. Therefore this
7577 statement is necessary. */
7581 if (dimension
== 0 && codimension
== 0)
7584 /* Make sure the last reference node is an array specification. */
7586 if (!ref2
|| ref2
->type
!= REF_ARRAY
|| ref2
->u
.ar
.type
== AR_FULL
7587 || (dimension
&& ref2
->u
.ar
.dimen
== 0))
7592 if (!gfc_notify_std (GFC_STD_F2008
, "Array specification required "
7593 "in ALLOCATE statement at %L", &e
->where
))
7595 if (code
->expr3
->rank
!= 0)
7596 *array_alloc_wo_spec
= true;
7599 gfc_error ("Array specification or array-valued SOURCE= "
7600 "expression required in ALLOCATE statement at %L",
7607 gfc_error ("Array specification required in ALLOCATE statement "
7608 "at %L", &e
->where
);
7613 /* Make sure that the array section reference makes sense in the
7614 context of an ALLOCATE specification. */
7619 for (i
= ar
->dimen
; i
< ar
->dimen
+ ar
->codimen
; i
++)
7620 if (ar
->dimen_type
[i
] == DIMEN_THIS_IMAGE
)
7622 gfc_error ("Coarray specification required in ALLOCATE statement "
7623 "at %L", &e
->where
);
7627 for (i
= 0; i
< ar
->dimen
; i
++)
7629 if (ar
->type
== AR_ELEMENT
|| ar
->type
== AR_FULL
)
7632 switch (ar
->dimen_type
[i
])
7638 if (ar
->start
[i
] != NULL
7639 && ar
->end
[i
] != NULL
7640 && ar
->stride
[i
] == NULL
)
7648 case DIMEN_THIS_IMAGE
:
7649 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7655 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7657 sym
= a
->expr
->symtree
->n
.sym
;
7659 /* TODO - check derived type components. */
7660 if (gfc_bt_struct (sym
->ts
.type
) || sym
->ts
.type
== BT_CLASS
)
7663 if ((ar
->start
[i
] != NULL
7664 && gfc_find_sym_in_expr (sym
, ar
->start
[i
]))
7665 || (ar
->end
[i
] != NULL
7666 && gfc_find_sym_in_expr (sym
, ar
->end
[i
])))
7668 gfc_error ("%qs must not appear in the array specification at "
7669 "%L in the same ALLOCATE statement where it is "
7670 "itself allocated", sym
->name
, &ar
->where
);
7676 for (i
= ar
->dimen
; i
< ar
->codimen
+ ar
->dimen
; i
++)
7678 if (ar
->dimen_type
[i
] == DIMEN_ELEMENT
7679 || ar
->dimen_type
[i
] == DIMEN_RANGE
)
7681 if (i
== (ar
->dimen
+ ar
->codimen
- 1))
7683 gfc_error ("Expected '*' in coindex specification in ALLOCATE "
7684 "statement at %L", &e
->where
);
7690 if (ar
->dimen_type
[i
] == DIMEN_STAR
&& i
== (ar
->dimen
+ ar
->codimen
- 1)
7691 && ar
->stride
[i
] == NULL
)
7694 gfc_error ("Bad coarray specification in ALLOCATE statement at %L",
7708 resolve_allocate_deallocate (gfc_code
*code
, const char *fcn
)
7710 gfc_expr
*stat
, *errmsg
, *pe
, *qe
;
7711 gfc_alloc
*a
, *p
, *q
;
7714 errmsg
= code
->expr2
;
7716 /* Check the stat variable. */
7719 gfc_check_vardef_context (stat
, false, false, false,
7720 _("STAT variable"));
7722 if ((stat
->ts
.type
!= BT_INTEGER
7723 && !(stat
->ref
&& (stat
->ref
->type
== REF_ARRAY
7724 || stat
->ref
->type
== REF_COMPONENT
)))
7726 gfc_error ("Stat-variable at %L must be a scalar INTEGER "
7727 "variable", &stat
->where
);
7729 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7730 if (p
->expr
->symtree
->n
.sym
->name
== stat
->symtree
->n
.sym
->name
)
7732 gfc_ref
*ref1
, *ref2
;
7735 for (ref1
= p
->expr
->ref
, ref2
= stat
->ref
; ref1
&& ref2
;
7736 ref1
= ref1
->next
, ref2
= ref2
->next
)
7738 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7740 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7749 gfc_error ("Stat-variable at %L shall not be %sd within "
7750 "the same %s statement", &stat
->where
, fcn
, fcn
);
7756 /* Check the errmsg variable. */
7760 gfc_warning (0, "ERRMSG at %L is useless without a STAT tag",
7763 gfc_check_vardef_context (errmsg
, false, false, false,
7764 _("ERRMSG variable"));
7766 if ((errmsg
->ts
.type
!= BT_CHARACTER
7768 && (errmsg
->ref
->type
== REF_ARRAY
7769 || errmsg
->ref
->type
== REF_COMPONENT
)))
7770 || errmsg
->rank
> 0 )
7771 gfc_error ("Errmsg-variable at %L must be a scalar CHARACTER "
7772 "variable", &errmsg
->where
);
7774 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7775 if (p
->expr
->symtree
->n
.sym
->name
== errmsg
->symtree
->n
.sym
->name
)
7777 gfc_ref
*ref1
, *ref2
;
7780 for (ref1
= p
->expr
->ref
, ref2
= errmsg
->ref
; ref1
&& ref2
;
7781 ref1
= ref1
->next
, ref2
= ref2
->next
)
7783 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7785 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7794 gfc_error ("Errmsg-variable at %L shall not be %sd within "
7795 "the same %s statement", &errmsg
->where
, fcn
, fcn
);
7801 /* Check that an allocate-object appears only once in the statement. */
7803 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7806 for (q
= p
->next
; q
; q
= q
->next
)
7809 if (pe
->symtree
->n
.sym
->name
== qe
->symtree
->n
.sym
->name
)
7811 /* This is a potential collision. */
7812 gfc_ref
*pr
= pe
->ref
;
7813 gfc_ref
*qr
= qe
->ref
;
7815 /* Follow the references until
7816 a) They start to differ, in which case there is no error;
7817 you can deallocate a%b and a%c in a single statement
7818 b) Both of them stop, which is an error
7819 c) One of them stops, which is also an error. */
7822 if (pr
== NULL
&& qr
== NULL
)
7824 gfc_error ("Allocate-object at %L also appears at %L",
7825 &pe
->where
, &qe
->where
);
7828 else if (pr
!= NULL
&& qr
== NULL
)
7830 gfc_error ("Allocate-object at %L is subobject of"
7831 " object at %L", &pe
->where
, &qe
->where
);
7834 else if (pr
== NULL
&& qr
!= NULL
)
7836 gfc_error ("Allocate-object at %L is subobject of"
7837 " object at %L", &qe
->where
, &pe
->where
);
7840 /* Here, pr != NULL && qr != NULL */
7841 gcc_assert(pr
->type
== qr
->type
);
7842 if (pr
->type
== REF_ARRAY
)
7844 /* Handle cases like allocate(v(3)%x(3), v(2)%x(3)),
7846 gcc_assert (qr
->type
== REF_ARRAY
);
7848 if (pr
->next
&& qr
->next
)
7851 gfc_array_ref
*par
= &(pr
->u
.ar
);
7852 gfc_array_ref
*qar
= &(qr
->u
.ar
);
7854 for (i
=0; i
<par
->dimen
; i
++)
7856 if ((par
->start
[i
] != NULL
7857 || qar
->start
[i
] != NULL
)
7858 && gfc_dep_compare_expr (par
->start
[i
],
7859 qar
->start
[i
]) != 0)
7866 if (pr
->u
.c
.component
->name
!= qr
->u
.c
.component
->name
)
7879 if (strcmp (fcn
, "ALLOCATE") == 0)
7881 bool arr_alloc_wo_spec
= false;
7883 /* Resolving the expr3 in the loop over all objects to allocate would
7884 execute loop invariant code for each loop item. Therefore do it just
7886 if (code
->expr3
&& code
->expr3
->mold
7887 && code
->expr3
->ts
.type
== BT_DERIVED
)
7889 /* Default initialization via MOLD (non-polymorphic). */
7890 gfc_expr
*rhs
= gfc_default_initializer (&code
->expr3
->ts
);
7893 gfc_resolve_expr (rhs
);
7894 gfc_free_expr (code
->expr3
);
7898 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7899 resolve_allocate_expr (a
->expr
, code
, &arr_alloc_wo_spec
);
7901 if (arr_alloc_wo_spec
&& code
->expr3
)
7903 /* Mark the allocate to have to take the array specification
7905 code
->ext
.alloc
.arr_spec_from_expr3
= 1;
7910 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7911 resolve_deallocate_expr (a
->expr
);
7916 /************ SELECT CASE resolution subroutines ************/
7918 /* Callback function for our mergesort variant. Determines interval
7919 overlaps for CASEs. Return <0 if op1 < op2, 0 for overlap, >0 for
7920 op1 > op2. Assumes we're not dealing with the default case.
7921 We have op1 = (:L), (K:L) or (K:) and op2 = (:N), (M:N) or (M:).
7922 There are nine situations to check. */
7925 compare_cases (const gfc_case
*op1
, const gfc_case
*op2
)
7929 if (op1
->low
== NULL
) /* op1 = (:L) */
7931 /* op2 = (:N), so overlap. */
7933 /* op2 = (M:) or (M:N), L < M */
7934 if (op2
->low
!= NULL
7935 && gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
7938 else if (op1
->high
== NULL
) /* op1 = (K:) */
7940 /* op2 = (M:), so overlap. */
7942 /* op2 = (:N) or (M:N), K > N */
7943 if (op2
->high
!= NULL
7944 && gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
7947 else /* op1 = (K:L) */
7949 if (op2
->low
== NULL
) /* op2 = (:N), K > N */
7950 retval
= (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
7952 else if (op2
->high
== NULL
) /* op2 = (M:), L < M */
7953 retval
= (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
7955 else /* op2 = (M:N) */
7959 if (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
7962 else if (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
7971 /* Merge-sort a double linked case list, detecting overlap in the
7972 process. LIST is the head of the double linked case list before it
7973 is sorted. Returns the head of the sorted list if we don't see any
7974 overlap, or NULL otherwise. */
7977 check_case_overlap (gfc_case
*list
)
7979 gfc_case
*p
, *q
, *e
, *tail
;
7980 int insize
, nmerges
, psize
, qsize
, cmp
, overlap_seen
;
7982 /* If the passed list was empty, return immediately. */
7989 /* Loop unconditionally. The only exit from this loop is a return
7990 statement, when we've finished sorting the case list. */
7997 /* Count the number of merges we do in this pass. */
8000 /* Loop while there exists a merge to be done. */
8005 /* Count this merge. */
8008 /* Cut the list in two pieces by stepping INSIZE places
8009 forward in the list, starting from P. */
8012 for (i
= 0; i
< insize
; i
++)
8021 /* Now we have two lists. Merge them! */
8022 while (psize
> 0 || (qsize
> 0 && q
!= NULL
))
8024 /* See from which the next case to merge comes from. */
8027 /* P is empty so the next case must come from Q. */
8032 else if (qsize
== 0 || q
== NULL
)
8041 cmp
= compare_cases (p
, q
);
8044 /* The whole case range for P is less than the
8052 /* The whole case range for Q is greater than
8053 the case range for P. */
8060 /* The cases overlap, or they are the same
8061 element in the list. Either way, we must
8062 issue an error and get the next case from P. */
8063 /* FIXME: Sort P and Q by line number. */
8064 gfc_error ("CASE label at %L overlaps with CASE "
8065 "label at %L", &p
->where
, &q
->where
);
8073 /* Add the next element to the merged list. */
8082 /* P has now stepped INSIZE places along, and so has Q. So
8083 they're the same. */
8088 /* If we have done only one merge or none at all, we've
8089 finished sorting the cases. */
8098 /* Otherwise repeat, merging lists twice the size. */
8104 /* Check to see if an expression is suitable for use in a CASE statement.
8105 Makes sure that all case expressions are scalar constants of the same
8106 type. Return false if anything is wrong. */
8109 validate_case_label_expr (gfc_expr
*e
, gfc_expr
*case_expr
)
8111 if (e
== NULL
) return true;
8113 if (e
->ts
.type
!= case_expr
->ts
.type
)
8115 gfc_error ("Expression in CASE statement at %L must be of type %s",
8116 &e
->where
, gfc_basic_typename (case_expr
->ts
.type
));
8120 /* C805 (R808) For a given case-construct, each case-value shall be of
8121 the same type as case-expr. For character type, length differences
8122 are allowed, but the kind type parameters shall be the same. */
8124 if (case_expr
->ts
.type
== BT_CHARACTER
&& e
->ts
.kind
!= case_expr
->ts
.kind
)
8126 gfc_error ("Expression in CASE statement at %L must be of kind %d",
8127 &e
->where
, case_expr
->ts
.kind
);
8131 /* Convert the case value kind to that of case expression kind,
8134 if (e
->ts
.kind
!= case_expr
->ts
.kind
)
8135 gfc_convert_type_warn (e
, &case_expr
->ts
, 2, 0);
8139 gfc_error ("Expression in CASE statement at %L must be scalar",
8148 /* Given a completely parsed select statement, we:
8150 - Validate all expressions and code within the SELECT.
8151 - Make sure that the selection expression is not of the wrong type.
8152 - Make sure that no case ranges overlap.
8153 - Eliminate unreachable cases and unreachable code resulting from
8154 removing case labels.
8156 The standard does allow unreachable cases, e.g. CASE (5:3). But
8157 they are a hassle for code generation, and to prevent that, we just
8158 cut them out here. This is not necessary for overlapping cases
8159 because they are illegal and we never even try to generate code.
8161 We have the additional caveat that a SELECT construct could have
8162 been a computed GOTO in the source code. Fortunately we can fairly
8163 easily work around that here: The case_expr for a "real" SELECT CASE
8164 is in code->expr1, but for a computed GOTO it is in code->expr2. All
8165 we have to do is make sure that the case_expr is a scalar integer
8169 resolve_select (gfc_code
*code
, bool select_type
)
8172 gfc_expr
*case_expr
;
8173 gfc_case
*cp
, *default_case
, *tail
, *head
;
8174 int seen_unreachable
;
8180 if (code
->expr1
== NULL
)
8182 /* This was actually a computed GOTO statement. */
8183 case_expr
= code
->expr2
;
8184 if (case_expr
->ts
.type
!= BT_INTEGER
|| case_expr
->rank
!= 0)
8185 gfc_error ("Selection expression in computed GOTO statement "
8186 "at %L must be a scalar integer expression",
8189 /* Further checking is not necessary because this SELECT was built
8190 by the compiler, so it should always be OK. Just move the
8191 case_expr from expr2 to expr so that we can handle computed
8192 GOTOs as normal SELECTs from here on. */
8193 code
->expr1
= code
->expr2
;
8198 case_expr
= code
->expr1
;
8199 type
= case_expr
->ts
.type
;
8202 if (type
!= BT_LOGICAL
&& type
!= BT_INTEGER
&& type
!= BT_CHARACTER
)
8204 gfc_error ("Argument of SELECT statement at %L cannot be %s",
8205 &case_expr
->where
, gfc_typename (&case_expr
->ts
));
8207 /* Punt. Going on here just produce more garbage error messages. */
8212 if (!select_type
&& case_expr
->rank
!= 0)
8214 gfc_error ("Argument of SELECT statement at %L must be a scalar "
8215 "expression", &case_expr
->where
);
8221 /* Raise a warning if an INTEGER case value exceeds the range of
8222 the case-expr. Later, all expressions will be promoted to the
8223 largest kind of all case-labels. */
8225 if (type
== BT_INTEGER
)
8226 for (body
= code
->block
; body
; body
= body
->block
)
8227 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8230 && gfc_check_integer_range (cp
->low
->value
.integer
,
8231 case_expr
->ts
.kind
) != ARITH_OK
)
8232 gfc_warning (0, "Expression in CASE statement at %L is "
8233 "not in the range of %s", &cp
->low
->where
,
8234 gfc_typename (&case_expr
->ts
));
8237 && cp
->low
!= cp
->high
8238 && gfc_check_integer_range (cp
->high
->value
.integer
,
8239 case_expr
->ts
.kind
) != ARITH_OK
)
8240 gfc_warning (0, "Expression in CASE statement at %L is "
8241 "not in the range of %s", &cp
->high
->where
,
8242 gfc_typename (&case_expr
->ts
));
8245 /* PR 19168 has a long discussion concerning a mismatch of the kinds
8246 of the SELECT CASE expression and its CASE values. Walk the lists
8247 of case values, and if we find a mismatch, promote case_expr to
8248 the appropriate kind. */
8250 if (type
== BT_LOGICAL
|| type
== BT_INTEGER
)
8252 for (body
= code
->block
; body
; body
= body
->block
)
8254 /* Walk the case label list. */
8255 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8257 /* Intercept the DEFAULT case. It does not have a kind. */
8258 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8261 /* Unreachable case ranges are discarded, so ignore. */
8262 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8263 && cp
->low
!= cp
->high
8264 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8268 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->low
))
8269 gfc_convert_type_warn (case_expr
, &cp
->low
->ts
, 2, 0);
8271 if (cp
->high
!= NULL
8272 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->high
))
8273 gfc_convert_type_warn (case_expr
, &cp
->high
->ts
, 2, 0);
8278 /* Assume there is no DEFAULT case. */
8279 default_case
= NULL
;
8284 for (body
= code
->block
; body
; body
= body
->block
)
8286 /* Assume the CASE list is OK, and all CASE labels can be matched. */
8288 seen_unreachable
= 0;
8290 /* Walk the case label list, making sure that all case labels
8292 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8294 /* Count the number of cases in the whole construct. */
8297 /* Intercept the DEFAULT case. */
8298 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8300 if (default_case
!= NULL
)
8302 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8303 "by a second DEFAULT CASE at %L",
8304 &default_case
->where
, &cp
->where
);
8315 /* Deal with single value cases and case ranges. Errors are
8316 issued from the validation function. */
8317 if (!validate_case_label_expr (cp
->low
, case_expr
)
8318 || !validate_case_label_expr (cp
->high
, case_expr
))
8324 if (type
== BT_LOGICAL
8325 && ((cp
->low
== NULL
|| cp
->high
== NULL
)
8326 || cp
->low
!= cp
->high
))
8328 gfc_error ("Logical range in CASE statement at %L is not "
8329 "allowed", &cp
->low
->where
);
8334 if (type
== BT_LOGICAL
&& cp
->low
->expr_type
== EXPR_CONSTANT
)
8337 value
= cp
->low
->value
.logical
== 0 ? 2 : 1;
8338 if (value
& seen_logical
)
8340 gfc_error ("Constant logical value in CASE statement "
8341 "is repeated at %L",
8346 seen_logical
|= value
;
8349 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8350 && cp
->low
!= cp
->high
8351 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8353 if (warn_surprising
)
8354 gfc_warning (OPT_Wsurprising
,
8355 "Range specification at %L can never be matched",
8358 cp
->unreachable
= 1;
8359 seen_unreachable
= 1;
8363 /* If the case range can be matched, it can also overlap with
8364 other cases. To make sure it does not, we put it in a
8365 double linked list here. We sort that with a merge sort
8366 later on to detect any overlapping cases. */
8370 head
->right
= head
->left
= NULL
;
8375 tail
->right
->left
= tail
;
8382 /* It there was a failure in the previous case label, give up
8383 for this case label list. Continue with the next block. */
8387 /* See if any case labels that are unreachable have been seen.
8388 If so, we eliminate them. This is a bit of a kludge because
8389 the case lists for a single case statement (label) is a
8390 single forward linked lists. */
8391 if (seen_unreachable
)
8393 /* Advance until the first case in the list is reachable. */
8394 while (body
->ext
.block
.case_list
!= NULL
8395 && body
->ext
.block
.case_list
->unreachable
)
8397 gfc_case
*n
= body
->ext
.block
.case_list
;
8398 body
->ext
.block
.case_list
= body
->ext
.block
.case_list
->next
;
8400 gfc_free_case_list (n
);
8403 /* Strip all other unreachable cases. */
8404 if (body
->ext
.block
.case_list
)
8406 for (cp
= body
->ext
.block
.case_list
; cp
&& cp
->next
; cp
= cp
->next
)
8408 if (cp
->next
->unreachable
)
8410 gfc_case
*n
= cp
->next
;
8411 cp
->next
= cp
->next
->next
;
8413 gfc_free_case_list (n
);
8420 /* See if there were overlapping cases. If the check returns NULL,
8421 there was overlap. In that case we don't do anything. If head
8422 is non-NULL, we prepend the DEFAULT case. The sorted list can
8423 then used during code generation for SELECT CASE constructs with
8424 a case expression of a CHARACTER type. */
8427 head
= check_case_overlap (head
);
8429 /* Prepend the default_case if it is there. */
8430 if (head
!= NULL
&& default_case
)
8432 default_case
->left
= NULL
;
8433 default_case
->right
= head
;
8434 head
->left
= default_case
;
8438 /* Eliminate dead blocks that may be the result if we've seen
8439 unreachable case labels for a block. */
8440 for (body
= code
; body
&& body
->block
; body
= body
->block
)
8442 if (body
->block
->ext
.block
.case_list
== NULL
)
8444 /* Cut the unreachable block from the code chain. */
8445 gfc_code
*c
= body
->block
;
8446 body
->block
= c
->block
;
8448 /* Kill the dead block, but not the blocks below it. */
8450 gfc_free_statements (c
);
8454 /* More than two cases is legal but insane for logical selects.
8455 Issue a warning for it. */
8456 if (warn_surprising
&& type
== BT_LOGICAL
&& ncases
> 2)
8457 gfc_warning (OPT_Wsurprising
,
8458 "Logical SELECT CASE block at %L has more that two cases",
8463 /* Check if a derived type is extensible. */
8466 gfc_type_is_extensible (gfc_symbol
*sym
)
8468 return !(sym
->attr
.is_bind_c
|| sym
->attr
.sequence
8469 || (sym
->attr
.is_class
8470 && sym
->components
->ts
.u
.derived
->attr
.unlimited_polymorphic
));
8475 resolve_types (gfc_namespace
*ns
);
8477 /* Resolve an associate-name: Resolve target and ensure the type-spec is
8478 correct as well as possibly the array-spec. */
8481 resolve_assoc_var (gfc_symbol
* sym
, bool resolve_target
)
8485 gcc_assert (sym
->assoc
);
8486 gcc_assert (sym
->attr
.flavor
== FL_VARIABLE
);
8488 /* If this is for SELECT TYPE, the target may not yet be set. In that
8489 case, return. Resolution will be called later manually again when
8491 target
= sym
->assoc
->target
;
8494 gcc_assert (!sym
->assoc
->dangling
);
8496 if (resolve_target
&& !gfc_resolve_expr (target
))
8499 /* For variable targets, we get some attributes from the target. */
8500 if (target
->expr_type
== EXPR_VARIABLE
)
8504 gcc_assert (target
->symtree
);
8505 tsym
= target
->symtree
->n
.sym
;
8507 sym
->attr
.asynchronous
= tsym
->attr
.asynchronous
;
8508 sym
->attr
.volatile_
= tsym
->attr
.volatile_
;
8510 sym
->attr
.target
= tsym
->attr
.target
8511 || gfc_expr_attr (target
).pointer
;
8512 if (is_subref_array (target
))
8513 sym
->attr
.subref_array_pointer
= 1;
8516 if (target
->expr_type
== EXPR_NULL
)
8518 gfc_error ("Selector at %L cannot be NULL()", &target
->where
);
8521 else if (target
->ts
.type
== BT_UNKNOWN
)
8523 gfc_error ("Selector at %L has no type", &target
->where
);
8527 /* Get type if this was not already set. Note that it can be
8528 some other type than the target in case this is a SELECT TYPE
8529 selector! So we must not update when the type is already there. */
8530 if (sym
->ts
.type
== BT_UNKNOWN
)
8531 sym
->ts
= target
->ts
;
8533 gcc_assert (sym
->ts
.type
!= BT_UNKNOWN
);
8535 /* See if this is a valid association-to-variable. */
8536 sym
->assoc
->variable
= (target
->expr_type
== EXPR_VARIABLE
8537 && !gfc_has_vector_subscript (target
));
8539 /* Finally resolve if this is an array or not. */
8540 if (sym
->attr
.dimension
&& target
->rank
== 0)
8542 /* primary.c makes the assumption that a reference to an associate
8543 name followed by a left parenthesis is an array reference. */
8544 if (sym
->ts
.type
!= BT_CHARACTER
)
8545 gfc_error ("Associate-name %qs at %L is used as array",
8546 sym
->name
, &sym
->declared_at
);
8547 sym
->attr
.dimension
= 0;
8552 /* We cannot deal with class selectors that need temporaries. */
8553 if (target
->ts
.type
== BT_CLASS
8554 && gfc_ref_needs_temporary_p (target
->ref
))
8556 gfc_error ("CLASS selector at %L needs a temporary which is not "
8557 "yet implemented", &target
->where
);
8561 if (target
->ts
.type
== BT_CLASS
)
8562 gfc_fix_class_refs (target
);
8564 if (target
->rank
!= 0)
8567 /* The rank may be incorrectly guessed at parsing, therefore make sure
8568 it is corrected now. */
8569 if (sym
->ts
.type
!= BT_CLASS
&& (!sym
->as
|| sym
->assoc
->rankguessed
))
8572 sym
->as
= gfc_get_array_spec ();
8574 as
->rank
= target
->rank
;
8575 as
->type
= AS_DEFERRED
;
8576 as
->corank
= gfc_get_corank (target
);
8577 sym
->attr
.dimension
= 1;
8578 if (as
->corank
!= 0)
8579 sym
->attr
.codimension
= 1;
8584 /* target's rank is 0, but the type of the sym is still array valued,
8585 which has to be corrected. */
8586 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)
8589 symbol_attribute attr
;
8590 /* The associated variable's type is still the array type
8591 correct this now. */
8592 gfc_typespec
*ts
= &target
->ts
;
8595 for (ref
= target
->ref
; ref
!= NULL
; ref
= ref
->next
)
8600 ts
= &ref
->u
.c
.component
->ts
;
8603 if (ts
->type
== BT_CLASS
)
8604 ts
= &ts
->u
.derived
->components
->ts
;
8610 /* Create a scalar instance of the current class type. Because the
8611 rank of a class array goes into its name, the type has to be
8612 rebuild. The alternative of (re-)setting just the attributes
8613 and as in the current type, destroys the type also in other
8617 sym
->ts
.type
= BT_CLASS
;
8618 attr
= CLASS_DATA (sym
)->attr
;
8620 attr
.associate_var
= 1;
8621 attr
.dimension
= attr
.codimension
= 0;
8622 attr
.class_pointer
= 1;
8623 if (!gfc_build_class_symbol (&sym
->ts
, &attr
, &as
))
8625 /* Make sure the _vptr is set. */
8626 c
= gfc_find_component (sym
->ts
.u
.derived
, "_vptr", true, true, NULL
);
8627 if (c
->ts
.u
.derived
== NULL
)
8628 c
->ts
.u
.derived
= gfc_find_derived_vtab (sym
->ts
.u
.derived
);
8629 CLASS_DATA (sym
)->attr
.pointer
= 1;
8630 CLASS_DATA (sym
)->attr
.class_pointer
= 1;
8631 gfc_set_sym_referenced (sym
->ts
.u
.derived
);
8632 gfc_commit_symbol (sym
->ts
.u
.derived
);
8633 /* _vptr now has the _vtab in it, change it to the _vtype. */
8634 if (c
->ts
.u
.derived
->attr
.vtab
)
8635 c
->ts
.u
.derived
= c
->ts
.u
.derived
->ts
.u
.derived
;
8636 c
->ts
.u
.derived
->ns
->types_resolved
= 0;
8637 resolve_types (c
->ts
.u
.derived
->ns
);
8641 /* Mark this as an associate variable. */
8642 sym
->attr
.associate_var
= 1;
8644 /* Fix up the type-spec for CHARACTER types. */
8645 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.select_type_temporary
)
8648 sym
->ts
.u
.cl
= target
->ts
.u
.cl
;
8650 if (!sym
->ts
.u
.cl
->length
8651 && !sym
->ts
.deferred
8652 && target
->expr_type
== EXPR_CONSTANT
)
8654 sym
->ts
.u
.cl
->length
=
8655 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
8656 target
->value
.character
.length
);
8658 else if ((!sym
->ts
.u
.cl
->length
8659 || sym
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
)
8660 && target
->expr_type
!= EXPR_VARIABLE
)
8662 sym
->ts
.u
.cl
= gfc_get_charlen();
8663 sym
->ts
.deferred
= 1;
8665 /* This is reset in trans-stmt.c after the assignment
8666 of the target expression to the associate name. */
8667 sym
->attr
.allocatable
= 1;
8671 /* If the target is a good class object, so is the associate variable. */
8672 if (sym
->ts
.type
== BT_CLASS
&& gfc_expr_attr (target
).class_ok
)
8673 sym
->attr
.class_ok
= 1;
8677 /* Ensure that SELECT TYPE expressions have the correct rank and a full
8678 array reference, where necessary. The symbols are artificial and so
8679 the dimension attribute and arrayspec can also be set. In addition,
8680 sometimes the expr1 arrives as BT_DERIVED, when the symbol is BT_CLASS.
8681 This is corrected here as well.*/
8684 fixup_array_ref (gfc_expr
**expr1
, gfc_expr
*expr2
,
8685 int rank
, gfc_ref
*ref
)
8687 gfc_ref
*nref
= (*expr1
)->ref
;
8688 gfc_symbol
*sym1
= (*expr1
)->symtree
->n
.sym
;
8689 gfc_symbol
*sym2
= expr2
? expr2
->symtree
->n
.sym
: NULL
;
8690 (*expr1
)->rank
= rank
;
8691 if (sym1
->ts
.type
== BT_CLASS
)
8693 if ((*expr1
)->ts
.type
!= BT_CLASS
)
8694 (*expr1
)->ts
= sym1
->ts
;
8696 CLASS_DATA (sym1
)->attr
.dimension
= 1;
8697 if (CLASS_DATA (sym1
)->as
== NULL
&& sym2
)
8698 CLASS_DATA (sym1
)->as
8699 = gfc_copy_array_spec (CLASS_DATA (sym2
)->as
);
8703 sym1
->attr
.dimension
= 1;
8704 if (sym1
->as
== NULL
&& sym2
)
8705 sym1
->as
= gfc_copy_array_spec (sym2
->as
);
8708 for (; nref
; nref
= nref
->next
)
8709 if (nref
->next
== NULL
)
8712 if (ref
&& nref
&& nref
->type
!= REF_ARRAY
)
8713 nref
->next
= gfc_copy_ref (ref
);
8714 else if (ref
&& !nref
)
8715 (*expr1
)->ref
= gfc_copy_ref (ref
);
8720 build_loc_call (gfc_expr
*sym_expr
)
8723 loc_call
= gfc_get_expr ();
8724 loc_call
->expr_type
= EXPR_FUNCTION
;
8725 gfc_get_sym_tree ("_loc", gfc_current_ns
, &loc_call
->symtree
, false);
8726 loc_call
->symtree
->n
.sym
->attr
.flavor
= FL_PROCEDURE
;
8727 loc_call
->symtree
->n
.sym
->attr
.intrinsic
= 1;
8728 loc_call
->symtree
->n
.sym
->result
= loc_call
->symtree
->n
.sym
;
8729 gfc_commit_symbol (loc_call
->symtree
->n
.sym
);
8730 loc_call
->ts
.type
= BT_INTEGER
;
8731 loc_call
->ts
.kind
= gfc_index_integer_kind
;
8732 loc_call
->value
.function
.isym
= gfc_intrinsic_function_by_id (GFC_ISYM_LOC
);
8733 loc_call
->value
.function
.actual
= gfc_get_actual_arglist ();
8734 loc_call
->value
.function
.actual
->expr
= sym_expr
;
8735 loc_call
->where
= sym_expr
->where
;
8739 /* Resolve a SELECT TYPE statement. */
8742 resolve_select_type (gfc_code
*code
, gfc_namespace
*old_ns
)
8744 gfc_symbol
*selector_type
;
8745 gfc_code
*body
, *new_st
, *if_st
, *tail
;
8746 gfc_code
*class_is
= NULL
, *default_case
= NULL
;
8749 char name
[GFC_MAX_SYMBOL_LEN
];
8753 gfc_ref
* ref
= NULL
;
8754 gfc_expr
*selector_expr
= NULL
;
8756 ns
= code
->ext
.block
.ns
;
8759 /* Check for F03:C813. */
8760 if (code
->expr1
->ts
.type
!= BT_CLASS
8761 && !(code
->expr2
&& code
->expr2
->ts
.type
== BT_CLASS
))
8763 gfc_error ("Selector shall be polymorphic in SELECT TYPE statement "
8764 "at %L", &code
->loc
);
8768 if (!code
->expr1
->symtree
->n
.sym
->attr
.class_ok
)
8773 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
8774 code
->expr1
->symtree
->n
.sym
->ts
= code
->expr2
->ts
;
8775 selector_type
= CLASS_DATA (code
->expr2
)->ts
.u
.derived
;
8777 if (code
->expr2
->rank
&& CLASS_DATA (code
->expr1
)->as
)
8778 CLASS_DATA (code
->expr1
)->as
->rank
= code
->expr2
->rank
;
8780 /* F2008: C803 The selector expression must not be coindexed. */
8781 if (gfc_is_coindexed (code
->expr2
))
8783 gfc_error ("Selector at %L must not be coindexed",
8784 &code
->expr2
->where
);
8791 selector_type
= CLASS_DATA (code
->expr1
)->ts
.u
.derived
;
8793 if (gfc_is_coindexed (code
->expr1
))
8795 gfc_error ("Selector at %L must not be coindexed",
8796 &code
->expr1
->where
);
8801 /* Loop over TYPE IS / CLASS IS cases. */
8802 for (body
= code
->block
; body
; body
= body
->block
)
8804 c
= body
->ext
.block
.case_list
;
8808 /* Check for repeated cases. */
8809 for (tail
= code
->block
; tail
; tail
= tail
->block
)
8811 gfc_case
*d
= tail
->ext
.block
.case_list
;
8815 if (c
->ts
.type
== d
->ts
.type
8816 && ((c
->ts
.type
== BT_DERIVED
8817 && c
->ts
.u
.derived
&& d
->ts
.u
.derived
8818 && !strcmp (c
->ts
.u
.derived
->name
,
8819 d
->ts
.u
.derived
->name
))
8820 || c
->ts
.type
== BT_UNKNOWN
8821 || (!(c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8822 && c
->ts
.kind
== d
->ts
.kind
)))
8824 gfc_error ("TYPE IS at %L overlaps with TYPE IS at %L",
8825 &c
->where
, &d
->where
);
8831 /* Check F03:C815. */
8832 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8833 && !selector_type
->attr
.unlimited_polymorphic
8834 && !gfc_type_is_extensible (c
->ts
.u
.derived
))
8836 gfc_error ("Derived type %qs at %L must be extensible",
8837 c
->ts
.u
.derived
->name
, &c
->where
);
8842 /* Check F03:C816. */
8843 if (c
->ts
.type
!= BT_UNKNOWN
&& !selector_type
->attr
.unlimited_polymorphic
8844 && ((c
->ts
.type
!= BT_DERIVED
&& c
->ts
.type
!= BT_CLASS
)
8845 || !gfc_type_is_extension_of (selector_type
, c
->ts
.u
.derived
)))
8847 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8848 gfc_error ("Derived type %qs at %L must be an extension of %qs",
8849 c
->ts
.u
.derived
->name
, &c
->where
, selector_type
->name
);
8851 gfc_error ("Unexpected intrinsic type %qs at %L",
8852 gfc_basic_typename (c
->ts
.type
), &c
->where
);
8857 /* Check F03:C814. */
8858 if (c
->ts
.type
== BT_CHARACTER
8859 && (c
->ts
.u
.cl
->length
!= NULL
|| c
->ts
.deferred
))
8861 gfc_error ("The type-spec at %L shall specify that each length "
8862 "type parameter is assumed", &c
->where
);
8867 /* Intercept the DEFAULT case. */
8868 if (c
->ts
.type
== BT_UNKNOWN
)
8870 /* Check F03:C818. */
8873 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8874 "by a second DEFAULT CASE at %L",
8875 &default_case
->ext
.block
.case_list
->where
, &c
->where
);
8880 default_case
= body
;
8887 /* Transform SELECT TYPE statement to BLOCK and associate selector to
8888 target if present. If there are any EXIT statements referring to the
8889 SELECT TYPE construct, this is no problem because the gfc_code
8890 reference stays the same and EXIT is equally possible from the BLOCK
8891 it is changed to. */
8892 code
->op
= EXEC_BLOCK
;
8895 gfc_association_list
* assoc
;
8897 assoc
= gfc_get_association_list ();
8898 assoc
->st
= code
->expr1
->symtree
;
8899 assoc
->target
= gfc_copy_expr (code
->expr2
);
8900 assoc
->target
->where
= code
->expr2
->where
;
8901 /* assoc->variable will be set by resolve_assoc_var. */
8903 code
->ext
.block
.assoc
= assoc
;
8904 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
8906 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
8909 code
->ext
.block
.assoc
= NULL
;
8911 /* Ensure that the selector rank and arrayspec are available to
8912 correct expressions in which they might be missing. */
8913 if (code
->expr2
&& code
->expr2
->rank
)
8915 rank
= code
->expr2
->rank
;
8916 for (ref
= code
->expr2
->ref
; ref
; ref
= ref
->next
)
8917 if (ref
->next
== NULL
)
8919 if (ref
&& ref
->type
== REF_ARRAY
)
8920 ref
= gfc_copy_ref (ref
);
8922 /* Fixup expr1 if necessary. */
8924 fixup_array_ref (&code
->expr1
, code
->expr2
, rank
, ref
);
8926 else if (code
->expr1
->rank
)
8928 rank
= code
->expr1
->rank
;
8929 for (ref
= code
->expr1
->ref
; ref
; ref
= ref
->next
)
8930 if (ref
->next
== NULL
)
8932 if (ref
&& ref
->type
== REF_ARRAY
)
8933 ref
= gfc_copy_ref (ref
);
8936 /* Add EXEC_SELECT to switch on type. */
8937 new_st
= gfc_get_code (code
->op
);
8938 new_st
->expr1
= code
->expr1
;
8939 new_st
->expr2
= code
->expr2
;
8940 new_st
->block
= code
->block
;
8941 code
->expr1
= code
->expr2
= NULL
;
8946 ns
->code
->next
= new_st
;
8948 code
->op
= EXEC_SELECT_TYPE
;
8950 /* Use the intrinsic LOC function to generate an integer expression
8951 for the vtable of the selector. Note that the rank of the selector
8952 expression has to be set to zero. */
8953 gfc_add_vptr_component (code
->expr1
);
8954 code
->expr1
->rank
= 0;
8955 code
->expr1
= build_loc_call (code
->expr1
);
8956 selector_expr
= code
->expr1
->value
.function
.actual
->expr
;
8958 /* Loop over TYPE IS / CLASS IS cases. */
8959 for (body
= code
->block
; body
; body
= body
->block
)
8963 c
= body
->ext
.block
.case_list
;
8965 /* Generate an index integer expression for address of the
8966 TYPE/CLASS vtable and store it in c->low. The hash expression
8967 is stored in c->high and is used to resolve intrinsic cases. */
8968 if (c
->ts
.type
!= BT_UNKNOWN
)
8970 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8972 vtab
= gfc_find_derived_vtab (c
->ts
.u
.derived
);
8974 c
->high
= gfc_get_int_expr (gfc_integer_4_kind
, NULL
,
8975 c
->ts
.u
.derived
->hash_value
);
8979 vtab
= gfc_find_vtab (&c
->ts
);
8980 gcc_assert (vtab
&& CLASS_DATA (vtab
)->initializer
);
8981 e
= CLASS_DATA (vtab
)->initializer
;
8982 c
->high
= gfc_copy_expr (e
);
8983 if (c
->high
->ts
.kind
!= gfc_integer_4_kind
)
8986 ts
.kind
= gfc_integer_4_kind
;
8987 ts
.type
= BT_INTEGER
;
8988 gfc_convert_type_warn (c
->high
, &ts
, 2, 0);
8992 e
= gfc_lval_expr_from_sym (vtab
);
8993 c
->low
= build_loc_call (e
);
8998 /* Associate temporary to selector. This should only be done
8999 when this case is actually true, so build a new ASSOCIATE
9000 that does precisely this here (instead of using the
9003 if (c
->ts
.type
== BT_CLASS
)
9004 sprintf (name
, "__tmp_class_%s", c
->ts
.u
.derived
->name
);
9005 else if (c
->ts
.type
== BT_DERIVED
)
9006 sprintf (name
, "__tmp_type_%s", c
->ts
.u
.derived
->name
);
9007 else if (c
->ts
.type
== BT_CHARACTER
)
9009 HOST_WIDE_INT charlen
= 0;
9010 if (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9011 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9012 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9013 snprintf (name
, sizeof (name
),
9014 "__tmp_%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9015 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9018 sprintf (name
, "__tmp_%s_%d", gfc_basic_typename (c
->ts
.type
),
9021 st
= gfc_find_symtree (ns
->sym_root
, name
);
9022 gcc_assert (st
->n
.sym
->assoc
);
9023 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9024 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9025 if (c
->ts
.type
!= BT_CLASS
&& c
->ts
.type
!= BT_UNKNOWN
)
9027 gfc_add_data_component (st
->n
.sym
->assoc
->target
);
9028 /* Fixup the target expression if necessary. */
9030 fixup_array_ref (&st
->n
.sym
->assoc
->target
, NULL
, rank
, ref
);
9033 new_st
= gfc_get_code (EXEC_BLOCK
);
9034 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9035 new_st
->ext
.block
.ns
->code
= body
->next
;
9036 body
->next
= new_st
;
9038 /* Chain in the new list only if it is marked as dangling. Otherwise
9039 there is a CASE label overlap and this is already used. Just ignore,
9040 the error is diagnosed elsewhere. */
9041 if (st
->n
.sym
->assoc
->dangling
)
9043 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9044 st
->n
.sym
->assoc
->dangling
= 0;
9047 resolve_assoc_var (st
->n
.sym
, false);
9050 /* Take out CLASS IS cases for separate treatment. */
9052 while (body
&& body
->block
)
9054 if (body
->block
->ext
.block
.case_list
->ts
.type
== BT_CLASS
)
9056 /* Add to class_is list. */
9057 if (class_is
== NULL
)
9059 class_is
= body
->block
;
9064 for (tail
= class_is
; tail
->block
; tail
= tail
->block
) ;
9065 tail
->block
= body
->block
;
9068 /* Remove from EXEC_SELECT list. */
9069 body
->block
= body
->block
->block
;
9082 /* Add a default case to hold the CLASS IS cases. */
9083 for (tail
= code
; tail
->block
; tail
= tail
->block
) ;
9084 tail
->block
= gfc_get_code (EXEC_SELECT_TYPE
);
9086 tail
->ext
.block
.case_list
= gfc_get_case ();
9087 tail
->ext
.block
.case_list
->ts
.type
= BT_UNKNOWN
;
9089 default_case
= tail
;
9092 /* More than one CLASS IS block? */
9093 if (class_is
->block
)
9097 /* Sort CLASS IS blocks by extension level. */
9101 for (c1
= &class_is
; (*c1
) && (*c1
)->block
; c1
= &((*c1
)->block
))
9104 /* F03:C817 (check for doubles). */
9105 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->hash_value
9106 == c2
->ext
.block
.case_list
->ts
.u
.derived
->hash_value
)
9108 gfc_error ("Double CLASS IS block in SELECT TYPE "
9110 &c2
->ext
.block
.case_list
->where
);
9113 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
9114 < c2
->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
)
9117 (*c1
)->block
= c2
->block
;
9127 /* Generate IF chain. */
9128 if_st
= gfc_get_code (EXEC_IF
);
9130 for (body
= class_is
; body
; body
= body
->block
)
9132 new_st
->block
= gfc_get_code (EXEC_IF
);
9133 new_st
= new_st
->block
;
9134 /* Set up IF condition: Call _gfortran_is_extension_of. */
9135 new_st
->expr1
= gfc_get_expr ();
9136 new_st
->expr1
->expr_type
= EXPR_FUNCTION
;
9137 new_st
->expr1
->ts
.type
= BT_LOGICAL
;
9138 new_st
->expr1
->ts
.kind
= 4;
9139 new_st
->expr1
->value
.function
.name
= gfc_get_string (PREFIX ("is_extension_of"));
9140 new_st
->expr1
->value
.function
.isym
= XCNEW (gfc_intrinsic_sym
);
9141 new_st
->expr1
->value
.function
.isym
->id
= GFC_ISYM_EXTENDS_TYPE_OF
;
9142 /* Set up arguments. */
9143 new_st
->expr1
->value
.function
.actual
= gfc_get_actual_arglist ();
9144 new_st
->expr1
->value
.function
.actual
->expr
= gfc_get_variable_expr (selector_expr
->symtree
);
9145 new_st
->expr1
->value
.function
.actual
->expr
->where
= code
->loc
;
9146 new_st
->expr1
->where
= code
->loc
;
9147 gfc_add_vptr_component (new_st
->expr1
->value
.function
.actual
->expr
);
9148 vtab
= gfc_find_derived_vtab (body
->ext
.block
.case_list
->ts
.u
.derived
);
9149 st
= gfc_find_symtree (vtab
->ns
->sym_root
, vtab
->name
);
9150 new_st
->expr1
->value
.function
.actual
->next
= gfc_get_actual_arglist ();
9151 new_st
->expr1
->value
.function
.actual
->next
->expr
= gfc_get_variable_expr (st
);
9152 new_st
->expr1
->value
.function
.actual
->next
->expr
->where
= code
->loc
;
9153 new_st
->next
= body
->next
;
9155 if (default_case
->next
)
9157 new_st
->block
= gfc_get_code (EXEC_IF
);
9158 new_st
= new_st
->block
;
9159 new_st
->next
= default_case
->next
;
9162 /* Replace CLASS DEFAULT code by the IF chain. */
9163 default_case
->next
= if_st
;
9166 /* Resolve the internal code. This can not be done earlier because
9167 it requires that the sym->assoc of selectors is set already. */
9168 gfc_current_ns
= ns
;
9169 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9170 gfc_current_ns
= old_ns
;
9177 /* Resolve a transfer statement. This is making sure that:
9178 -- a derived type being transferred has only non-pointer components
9179 -- a derived type being transferred doesn't have private components, unless
9180 it's being transferred from the module where the type was defined
9181 -- we're not trying to transfer a whole assumed size array. */
9184 resolve_transfer (gfc_code
*code
)
9187 gfc_symbol
*sym
, *derived
;
9191 bool formatted
= false;
9192 gfc_dt
*dt
= code
->ext
.dt
;
9193 gfc_symbol
*dtio_sub
= NULL
;
9197 while (exp
!= NULL
&& exp
->expr_type
== EXPR_OP
9198 && exp
->value
.op
.op
== INTRINSIC_PARENTHESES
)
9199 exp
= exp
->value
.op
.op1
;
9201 if (exp
&& exp
->expr_type
== EXPR_NULL
9204 gfc_error ("Invalid context for NULL () intrinsic at %L",
9209 if (exp
== NULL
|| (exp
->expr_type
!= EXPR_VARIABLE
9210 && exp
->expr_type
!= EXPR_FUNCTION
9211 && exp
->expr_type
!= EXPR_STRUCTURE
))
9214 /* If we are reading, the variable will be changed. Note that
9215 code->ext.dt may be NULL if the TRANSFER is related to
9216 an INQUIRE statement -- but in this case, we are not reading, either. */
9217 if (dt
&& dt
->dt_io_kind
->value
.iokind
== M_READ
9218 && !gfc_check_vardef_context (exp
, false, false, false,
9222 ts
= exp
->expr_type
== EXPR_STRUCTURE
? &exp
->ts
: &exp
->symtree
->n
.sym
->ts
;
9224 /* Go to actual component transferred. */
9225 for (ref
= exp
->ref
; ref
; ref
= ref
->next
)
9226 if (ref
->type
== REF_COMPONENT
)
9227 ts
= &ref
->u
.c
.component
->ts
;
9229 if (dt
&& dt
->dt_io_kind
->value
.iokind
!= M_INQUIRE
9230 && (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
))
9232 if (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
)
9233 derived
= ts
->u
.derived
;
9235 derived
= ts
->u
.derived
->components
->ts
.u
.derived
;
9237 /* Determine when to use the formatted DTIO procedure. */
9238 if (dt
&& (dt
->format_expr
|| dt
->format_label
))
9241 write
= dt
->dt_io_kind
->value
.iokind
== M_WRITE
9242 || dt
->dt_io_kind
->value
.iokind
== M_PRINT
;
9243 dtio_sub
= gfc_find_specific_dtio_proc (derived
, write
, formatted
);
9245 if (dtio_sub
!= NULL
&& exp
->expr_type
== EXPR_VARIABLE
)
9248 sym
= exp
->symtree
->n
.sym
->ns
->proc_name
;
9249 /* Check to see if this is a nested DTIO call, with the
9250 dummy as the io-list object. */
9251 if (sym
&& sym
== dtio_sub
&& sym
->formal
9252 && sym
->formal
->sym
== exp
->symtree
->n
.sym
9253 && exp
->ref
== NULL
)
9255 if (!sym
->attr
.recursive
)
9257 gfc_error ("DTIO %s procedure at %L must be recursive",
9258 sym
->name
, &sym
->declared_at
);
9265 if (ts
->type
== BT_CLASS
&& dtio_sub
== NULL
)
9267 gfc_error ("Data transfer element at %L cannot be polymorphic unless "
9268 "it is processed by a defined input/output procedure",
9273 if (ts
->type
== BT_DERIVED
)
9275 /* Check that transferred derived type doesn't contain POINTER
9276 components unless it is processed by a defined input/output
9278 if (ts
->u
.derived
->attr
.pointer_comp
&& dtio_sub
== NULL
)
9280 gfc_error ("Data transfer element at %L cannot have POINTER "
9281 "components unless it is processed by a defined "
9282 "input/output procedure", &code
->loc
);
9287 if (ts
->u
.derived
->attr
.proc_pointer_comp
)
9289 gfc_error ("Data transfer element at %L cannot have "
9290 "procedure pointer components", &code
->loc
);
9294 if (ts
->u
.derived
->attr
.alloc_comp
&& dtio_sub
== NULL
)
9296 gfc_error ("Data transfer element at %L cannot have ALLOCATABLE "
9297 "components unless it is processed by a defined "
9298 "input/output procedure", &code
->loc
);
9302 /* C_PTR and C_FUNPTR have private components which means they can not
9303 be printed. However, if -std=gnu and not -pedantic, allow
9304 the component to be printed to help debugging. */
9305 if (ts
->u
.derived
->ts
.f90_type
== BT_VOID
)
9307 if (!gfc_notify_std (GFC_STD_GNU
, "Data transfer element at %L "
9308 "cannot have PRIVATE components", &code
->loc
))
9311 else if (derived_inaccessible (ts
->u
.derived
) && dtio_sub
== NULL
)
9313 gfc_error ("Data transfer element at %L cannot have "
9314 "PRIVATE components unless it is processed by "
9315 "a defined input/output procedure", &code
->loc
);
9320 if (exp
->expr_type
== EXPR_STRUCTURE
)
9323 sym
= exp
->symtree
->n
.sym
;
9325 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SIZE
&& exp
->ref
9326 && exp
->ref
->type
== REF_ARRAY
&& exp
->ref
->u
.ar
.type
== AR_FULL
)
9328 gfc_error ("Data transfer element at %L cannot be a full reference to "
9329 "an assumed-size array", &code
->loc
);
9333 if (async_io_dt
&& exp
->expr_type
== EXPR_VARIABLE
)
9334 exp
->symtree
->n
.sym
->attr
.asynchronous
= 1;
9338 /*********** Toplevel code resolution subroutines ***********/
9340 /* Find the set of labels that are reachable from this block. We also
9341 record the last statement in each block. */
9344 find_reachable_labels (gfc_code
*block
)
9351 cs_base
->reachable_labels
= bitmap_alloc (&labels_obstack
);
9353 /* Collect labels in this block. We don't keep those corresponding
9354 to END {IF|SELECT}, these are checked in resolve_branch by going
9355 up through the code_stack. */
9356 for (c
= block
; c
; c
= c
->next
)
9358 if (c
->here
&& c
->op
!= EXEC_END_NESTED_BLOCK
)
9359 bitmap_set_bit (cs_base
->reachable_labels
, c
->here
->value
);
9362 /* Merge with labels from parent block. */
9365 gcc_assert (cs_base
->prev
->reachable_labels
);
9366 bitmap_ior_into (cs_base
->reachable_labels
,
9367 cs_base
->prev
->reachable_labels
);
9373 resolve_lock_unlock_event (gfc_code
*code
)
9375 if (code
->expr1
->expr_type
== EXPR_FUNCTION
9376 && code
->expr1
->value
.function
.isym
9377 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
9378 remove_caf_get_intrinsic (code
->expr1
);
9380 if ((code
->op
== EXEC_LOCK
|| code
->op
== EXEC_UNLOCK
)
9381 && (code
->expr1
->ts
.type
!= BT_DERIVED
9382 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9383 || code
->expr1
->ts
.u
.derived
->from_intmod
!= INTMOD_ISO_FORTRAN_ENV
9384 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
!= ISOFORTRAN_LOCK_TYPE
9385 || code
->expr1
->rank
!= 0
9386 || (!gfc_is_coarray (code
->expr1
) &&
9387 !gfc_is_coindexed (code
->expr1
))))
9388 gfc_error ("Lock variable at %L must be a scalar of type LOCK_TYPE",
9389 &code
->expr1
->where
);
9390 else if ((code
->op
== EXEC_EVENT_POST
|| code
->op
== EXEC_EVENT_WAIT
)
9391 && (code
->expr1
->ts
.type
!= BT_DERIVED
9392 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9393 || code
->expr1
->ts
.u
.derived
->from_intmod
9394 != INTMOD_ISO_FORTRAN_ENV
9395 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
9396 != ISOFORTRAN_EVENT_TYPE
9397 || code
->expr1
->rank
!= 0))
9398 gfc_error ("Event variable at %L must be a scalar of type EVENT_TYPE",
9399 &code
->expr1
->where
);
9400 else if (code
->op
== EXEC_EVENT_POST
&& !gfc_is_coarray (code
->expr1
)
9401 && !gfc_is_coindexed (code
->expr1
))
9402 gfc_error ("Event variable argument at %L must be a coarray or coindexed",
9403 &code
->expr1
->where
);
9404 else if (code
->op
== EXEC_EVENT_WAIT
&& !gfc_is_coarray (code
->expr1
))
9405 gfc_error ("Event variable argument at %L must be a coarray but not "
9406 "coindexed", &code
->expr1
->where
);
9410 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9411 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9412 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9413 &code
->expr2
->where
);
9416 && !gfc_check_vardef_context (code
->expr2
, false, false, false,
9417 _("STAT variable")))
9422 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9423 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9424 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9425 &code
->expr3
->where
);
9428 && !gfc_check_vardef_context (code
->expr3
, false, false, false,
9429 _("ERRMSG variable")))
9432 /* Check for LOCK the ACQUIRED_LOCK. */
9433 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9434 && (code
->expr4
->ts
.type
!= BT_LOGICAL
|| code
->expr4
->rank
!= 0
9435 || code
->expr4
->expr_type
!= EXPR_VARIABLE
))
9436 gfc_error ("ACQUIRED_LOCK= argument at %L must be a scalar LOGICAL "
9437 "variable", &code
->expr4
->where
);
9439 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9440 && !gfc_check_vardef_context (code
->expr4
, false, false, false,
9441 _("ACQUIRED_LOCK variable")))
9444 /* Check for EVENT WAIT the UNTIL_COUNT. */
9445 if (code
->op
== EXEC_EVENT_WAIT
&& code
->expr4
)
9447 if (!gfc_resolve_expr (code
->expr4
) || code
->expr4
->ts
.type
!= BT_INTEGER
9448 || code
->expr4
->rank
!= 0)
9449 gfc_error ("UNTIL_COUNT= argument at %L must be a scalar INTEGER "
9450 "expression", &code
->expr4
->where
);
9456 resolve_critical (gfc_code
*code
)
9458 gfc_symtree
*symtree
;
9459 gfc_symbol
*lock_type
;
9460 char name
[GFC_MAX_SYMBOL_LEN
];
9461 static int serial
= 0;
9463 if (flag_coarray
!= GFC_FCOARRAY_LIB
)
9466 symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
9467 GFC_PREFIX ("lock_type"));
9469 lock_type
= symtree
->n
.sym
;
9472 if (gfc_get_sym_tree (GFC_PREFIX ("lock_type"), gfc_current_ns
, &symtree
,
9475 lock_type
= symtree
->n
.sym
;
9476 lock_type
->attr
.flavor
= FL_DERIVED
;
9477 lock_type
->attr
.zero_comp
= 1;
9478 lock_type
->from_intmod
= INTMOD_ISO_FORTRAN_ENV
;
9479 lock_type
->intmod_sym_id
= ISOFORTRAN_LOCK_TYPE
;
9482 sprintf(name
, GFC_PREFIX ("lock_var") "%d",serial
++);
9483 if (gfc_get_sym_tree (name
, gfc_current_ns
, &symtree
, false) != 0)
9486 code
->resolved_sym
= symtree
->n
.sym
;
9487 symtree
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
9488 symtree
->n
.sym
->attr
.referenced
= 1;
9489 symtree
->n
.sym
->attr
.artificial
= 1;
9490 symtree
->n
.sym
->attr
.codimension
= 1;
9491 symtree
->n
.sym
->ts
.type
= BT_DERIVED
;
9492 symtree
->n
.sym
->ts
.u
.derived
= lock_type
;
9493 symtree
->n
.sym
->as
= gfc_get_array_spec ();
9494 symtree
->n
.sym
->as
->corank
= 1;
9495 symtree
->n
.sym
->as
->type
= AS_EXPLICIT
;
9496 symtree
->n
.sym
->as
->cotype
= AS_EXPLICIT
;
9497 symtree
->n
.sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
,
9499 gfc_commit_symbols();
9504 resolve_sync (gfc_code
*code
)
9506 /* Check imageset. The * case matches expr1 == NULL. */
9509 if (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
> 1)
9510 gfc_error ("Imageset argument at %L must be a scalar or rank-1 "
9511 "INTEGER expression", &code
->expr1
->where
);
9512 if (code
->expr1
->expr_type
== EXPR_CONSTANT
&& code
->expr1
->rank
== 0
9513 && mpz_cmp_si (code
->expr1
->value
.integer
, 1) < 0)
9514 gfc_error ("Imageset argument at %L must between 1 and num_images()",
9515 &code
->expr1
->where
);
9516 else if (code
->expr1
->expr_type
== EXPR_ARRAY
9517 && gfc_simplify_expr (code
->expr1
, 0))
9519 gfc_constructor
*cons
;
9520 cons
= gfc_constructor_first (code
->expr1
->value
.constructor
);
9521 for (; cons
; cons
= gfc_constructor_next (cons
))
9522 if (cons
->expr
->expr_type
== EXPR_CONSTANT
9523 && mpz_cmp_si (cons
->expr
->value
.integer
, 1) < 0)
9524 gfc_error ("Imageset argument at %L must between 1 and "
9525 "num_images()", &cons
->expr
->where
);
9531 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9532 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9533 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9534 &code
->expr2
->where
);
9538 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9539 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9540 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9541 &code
->expr3
->where
);
9545 /* Given a branch to a label, see if the branch is conforming.
9546 The code node describes where the branch is located. */
9549 resolve_branch (gfc_st_label
*label
, gfc_code
*code
)
9556 /* Step one: is this a valid branching target? */
9558 if (label
->defined
== ST_LABEL_UNKNOWN
)
9560 gfc_error ("Label %d referenced at %L is never defined", label
->value
,
9565 if (label
->defined
!= ST_LABEL_TARGET
&& label
->defined
!= ST_LABEL_DO_TARGET
)
9567 gfc_error ("Statement at %L is not a valid branch target statement "
9568 "for the branch statement at %L", &label
->where
, &code
->loc
);
9572 /* Step two: make sure this branch is not a branch to itself ;-) */
9574 if (code
->here
== label
)
9577 "Branch at %L may result in an infinite loop", &code
->loc
);
9581 /* Step three: See if the label is in the same block as the
9582 branching statement. The hard work has been done by setting up
9583 the bitmap reachable_labels. */
9585 if (bitmap_bit_p (cs_base
->reachable_labels
, label
->value
))
9587 /* Check now whether there is a CRITICAL construct; if so, check
9588 whether the label is still visible outside of the CRITICAL block,
9589 which is invalid. */
9590 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9592 if (stack
->current
->op
== EXEC_CRITICAL
9593 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9594 gfc_error ("GOTO statement at %L leaves CRITICAL construct for "
9595 "label at %L", &code
->loc
, &label
->where
);
9596 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
9597 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9598 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct "
9599 "for label at %L", &code
->loc
, &label
->where
);
9605 /* Step four: If we haven't found the label in the bitmap, it may
9606 still be the label of the END of the enclosing block, in which
9607 case we find it by going up the code_stack. */
9609 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9611 if (stack
->current
->next
&& stack
->current
->next
->here
== label
)
9613 if (stack
->current
->op
== EXEC_CRITICAL
)
9615 /* Note: A label at END CRITICAL does not leave the CRITICAL
9616 construct as END CRITICAL is still part of it. */
9617 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
9618 " at %L", &code
->loc
, &label
->where
);
9621 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
)
9623 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct for "
9624 "label at %L", &code
->loc
, &label
->where
);
9631 gcc_assert (stack
->current
->next
->op
== EXEC_END_NESTED_BLOCK
);
9635 /* The label is not in an enclosing block, so illegal. This was
9636 allowed in Fortran 66, so we allow it as extension. No
9637 further checks are necessary in this case. */
9638 gfc_notify_std (GFC_STD_LEGACY
, "Label at %L is not in the same block "
9639 "as the GOTO statement at %L", &label
->where
,
9645 /* Check whether EXPR1 has the same shape as EXPR2. */
9648 resolve_where_shape (gfc_expr
*expr1
, gfc_expr
*expr2
)
9650 mpz_t shape
[GFC_MAX_DIMENSIONS
];
9651 mpz_t shape2
[GFC_MAX_DIMENSIONS
];
9652 bool result
= false;
9655 /* Compare the rank. */
9656 if (expr1
->rank
!= expr2
->rank
)
9659 /* Compare the size of each dimension. */
9660 for (i
=0; i
<expr1
->rank
; i
++)
9662 if (!gfc_array_dimen_size (expr1
, i
, &shape
[i
]))
9665 if (!gfc_array_dimen_size (expr2
, i
, &shape2
[i
]))
9668 if (mpz_cmp (shape
[i
], shape2
[i
]))
9672 /* When either of the two expression is an assumed size array, we
9673 ignore the comparison of dimension sizes. */
9678 gfc_clear_shape (shape
, i
);
9679 gfc_clear_shape (shape2
, i
);
9684 /* Check whether a WHERE assignment target or a WHERE mask expression
9685 has the same shape as the outmost WHERE mask expression. */
9688 resolve_where (gfc_code
*code
, gfc_expr
*mask
)
9694 cblock
= code
->block
;
9696 /* Store the first WHERE mask-expr of the WHERE statement or construct.
9697 In case of nested WHERE, only the outmost one is stored. */
9698 if (mask
== NULL
) /* outmost WHERE */
9700 else /* inner WHERE */
9707 /* Check if the mask-expr has a consistent shape with the
9708 outmost WHERE mask-expr. */
9709 if (!resolve_where_shape (cblock
->expr1
, e
))
9710 gfc_error ("WHERE mask at %L has inconsistent shape",
9711 &cblock
->expr1
->where
);
9714 /* the assignment statement of a WHERE statement, or the first
9715 statement in where-body-construct of a WHERE construct */
9716 cnext
= cblock
->next
;
9721 /* WHERE assignment statement */
9724 /* Check shape consistent for WHERE assignment target. */
9725 if (e
&& !resolve_where_shape (cnext
->expr1
, e
))
9726 gfc_error ("WHERE assignment target at %L has "
9727 "inconsistent shape", &cnext
->expr1
->where
);
9731 case EXEC_ASSIGN_CALL
:
9732 resolve_call (cnext
);
9733 if (!cnext
->resolved_sym
->attr
.elemental
)
9734 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9735 &cnext
->ext
.actual
->expr
->where
);
9738 /* WHERE or WHERE construct is part of a where-body-construct */
9740 resolve_where (cnext
, e
);
9744 gfc_error ("Unsupported statement inside WHERE at %L",
9747 /* the next statement within the same where-body-construct */
9748 cnext
= cnext
->next
;
9750 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
9751 cblock
= cblock
->block
;
9756 /* Resolve assignment in FORALL construct.
9757 NVAR is the number of FORALL index variables, and VAR_EXPR records the
9758 FORALL index variables. */
9761 gfc_resolve_assign_in_forall (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
9765 for (n
= 0; n
< nvar
; n
++)
9767 gfc_symbol
*forall_index
;
9769 forall_index
= var_expr
[n
]->symtree
->n
.sym
;
9771 /* Check whether the assignment target is one of the FORALL index
9773 if ((code
->expr1
->expr_type
== EXPR_VARIABLE
)
9774 && (code
->expr1
->symtree
->n
.sym
== forall_index
))
9775 gfc_error ("Assignment to a FORALL index variable at %L",
9776 &code
->expr1
->where
);
9779 /* If one of the FORALL index variables doesn't appear in the
9780 assignment variable, then there could be a many-to-one
9781 assignment. Emit a warning rather than an error because the
9782 mask could be resolving this problem. */
9783 if (!find_forall_index (code
->expr1
, forall_index
, 0))
9784 gfc_warning (0, "The FORALL with index %qs is not used on the "
9785 "left side of the assignment at %L and so might "
9786 "cause multiple assignment to this object",
9787 var_expr
[n
]->symtree
->name
, &code
->expr1
->where
);
9793 /* Resolve WHERE statement in FORALL construct. */
9796 gfc_resolve_where_code_in_forall (gfc_code
*code
, int nvar
,
9797 gfc_expr
**var_expr
)
9802 cblock
= code
->block
;
9805 /* the assignment statement of a WHERE statement, or the first
9806 statement in where-body-construct of a WHERE construct */
9807 cnext
= cblock
->next
;
9812 /* WHERE assignment statement */
9814 gfc_resolve_assign_in_forall (cnext
, nvar
, var_expr
);
9817 /* WHERE operator assignment statement */
9818 case EXEC_ASSIGN_CALL
:
9819 resolve_call (cnext
);
9820 if (!cnext
->resolved_sym
->attr
.elemental
)
9821 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9822 &cnext
->ext
.actual
->expr
->where
);
9825 /* WHERE or WHERE construct is part of a where-body-construct */
9827 gfc_resolve_where_code_in_forall (cnext
, nvar
, var_expr
);
9831 gfc_error ("Unsupported statement inside WHERE at %L",
9834 /* the next statement within the same where-body-construct */
9835 cnext
= cnext
->next
;
9837 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
9838 cblock
= cblock
->block
;
9843 /* Traverse the FORALL body to check whether the following errors exist:
9844 1. For assignment, check if a many-to-one assignment happens.
9845 2. For WHERE statement, check the WHERE body to see if there is any
9846 many-to-one assignment. */
9849 gfc_resolve_forall_body (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
9853 c
= code
->block
->next
;
9859 case EXEC_POINTER_ASSIGN
:
9860 gfc_resolve_assign_in_forall (c
, nvar
, var_expr
);
9863 case EXEC_ASSIGN_CALL
:
9867 /* Because the gfc_resolve_blocks() will handle the nested FORALL,
9868 there is no need to handle it here. */
9872 gfc_resolve_where_code_in_forall(c
, nvar
, var_expr
);
9877 /* The next statement in the FORALL body. */
9883 /* Counts the number of iterators needed inside a forall construct, including
9884 nested forall constructs. This is used to allocate the needed memory
9885 in gfc_resolve_forall. */
9888 gfc_count_forall_iterators (gfc_code
*code
)
9890 int max_iters
, sub_iters
, current_iters
;
9891 gfc_forall_iterator
*fa
;
9893 gcc_assert(code
->op
== EXEC_FORALL
);
9897 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
9900 code
= code
->block
->next
;
9904 if (code
->op
== EXEC_FORALL
)
9906 sub_iters
= gfc_count_forall_iterators (code
);
9907 if (sub_iters
> max_iters
)
9908 max_iters
= sub_iters
;
9913 return current_iters
+ max_iters
;
9917 /* Given a FORALL construct, first resolve the FORALL iterator, then call
9918 gfc_resolve_forall_body to resolve the FORALL body. */
9921 gfc_resolve_forall (gfc_code
*code
, gfc_namespace
*ns
, int forall_save
)
9923 static gfc_expr
**var_expr
;
9924 static int total_var
= 0;
9925 static int nvar
= 0;
9926 int i
, old_nvar
, tmp
;
9927 gfc_forall_iterator
*fa
;
9931 /* Start to resolve a FORALL construct */
9932 if (forall_save
== 0)
9934 /* Count the total number of FORALL indices in the nested FORALL
9935 construct in order to allocate the VAR_EXPR with proper size. */
9936 total_var
= gfc_count_forall_iterators (code
);
9938 /* Allocate VAR_EXPR with NUMBER_OF_FORALL_INDEX elements. */
9939 var_expr
= XCNEWVEC (gfc_expr
*, total_var
);
9942 /* The information about FORALL iterator, including FORALL indices start, end
9943 and stride. An outer FORALL indice cannot appear in start, end or stride. */
9944 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
9946 /* Fortran 20008: C738 (R753). */
9947 if (fa
->var
->ref
&& fa
->var
->ref
->type
== REF_ARRAY
)
9949 gfc_error ("FORALL index-name at %L must be a scalar variable "
9950 "of type integer", &fa
->var
->where
);
9954 /* Check if any outer FORALL index name is the same as the current
9956 for (i
= 0; i
< nvar
; i
++)
9958 if (fa
->var
->symtree
->n
.sym
== var_expr
[i
]->symtree
->n
.sym
)
9959 gfc_error ("An outer FORALL construct already has an index "
9960 "with this name %L", &fa
->var
->where
);
9963 /* Record the current FORALL index. */
9964 var_expr
[nvar
] = gfc_copy_expr (fa
->var
);
9968 /* No memory leak. */
9969 gcc_assert (nvar
<= total_var
);
9972 /* Resolve the FORALL body. */
9973 gfc_resolve_forall_body (code
, nvar
, var_expr
);
9975 /* May call gfc_resolve_forall to resolve the inner FORALL loop. */
9976 gfc_resolve_blocks (code
->block
, ns
);
9980 /* Free only the VAR_EXPRs allocated in this frame. */
9981 for (i
= nvar
; i
< tmp
; i
++)
9982 gfc_free_expr (var_expr
[i
]);
9986 /* We are in the outermost FORALL construct. */
9987 gcc_assert (forall_save
== 0);
9989 /* VAR_EXPR is not needed any more. */
9996 /* Resolve a BLOCK construct statement. */
9999 resolve_block_construct (gfc_code
* code
)
10001 /* Resolve the BLOCK's namespace. */
10002 gfc_resolve (code
->ext
.block
.ns
);
10004 /* For an ASSOCIATE block, the associations (and their targets) are already
10005 resolved during resolve_symbol. */
10009 /* Resolve lists of blocks found in IF, SELECT CASE, WHERE, FORALL, GOTO and
10013 gfc_resolve_blocks (gfc_code
*b
, gfc_namespace
*ns
)
10017 for (; b
; b
= b
->block
)
10019 t
= gfc_resolve_expr (b
->expr1
);
10020 if (!gfc_resolve_expr (b
->expr2
))
10026 if (t
&& b
->expr1
!= NULL
10027 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
!= 0))
10028 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
10034 && b
->expr1
!= NULL
10035 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
== 0))
10036 gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
10041 resolve_branch (b
->label1
, b
);
10045 resolve_block_construct (b
);
10049 case EXEC_SELECT_TYPE
:
10052 case EXEC_DO_WHILE
:
10053 case EXEC_DO_CONCURRENT
:
10054 case EXEC_CRITICAL
:
10057 case EXEC_IOLENGTH
:
10061 case EXEC_OMP_ATOMIC
:
10062 case EXEC_OACC_ATOMIC
:
10064 gfc_omp_atomic_op aop
10065 = (gfc_omp_atomic_op
) (b
->ext
.omp_atomic
& GFC_OMP_ATOMIC_MASK
);
10067 /* Verify this before calling gfc_resolve_code, which might
10069 gcc_assert (b
->next
&& b
->next
->op
== EXEC_ASSIGN
);
10070 gcc_assert (((aop
!= GFC_OMP_ATOMIC_CAPTURE
)
10071 && b
->next
->next
== NULL
)
10072 || ((aop
== GFC_OMP_ATOMIC_CAPTURE
)
10073 && b
->next
->next
!= NULL
10074 && b
->next
->next
->op
== EXEC_ASSIGN
10075 && b
->next
->next
->next
== NULL
));
10079 case EXEC_OACC_PARALLEL_LOOP
:
10080 case EXEC_OACC_PARALLEL
:
10081 case EXEC_OACC_KERNELS_LOOP
:
10082 case EXEC_OACC_KERNELS
:
10083 case EXEC_OACC_DATA
:
10084 case EXEC_OACC_HOST_DATA
:
10085 case EXEC_OACC_LOOP
:
10086 case EXEC_OACC_UPDATE
:
10087 case EXEC_OACC_WAIT
:
10088 case EXEC_OACC_CACHE
:
10089 case EXEC_OACC_ENTER_DATA
:
10090 case EXEC_OACC_EXIT_DATA
:
10091 case EXEC_OACC_ROUTINE
:
10092 case EXEC_OMP_CRITICAL
:
10093 case EXEC_OMP_DISTRIBUTE
:
10094 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
10095 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
10096 case EXEC_OMP_DISTRIBUTE_SIMD
:
10098 case EXEC_OMP_DO_SIMD
:
10099 case EXEC_OMP_MASTER
:
10100 case EXEC_OMP_ORDERED
:
10101 case EXEC_OMP_PARALLEL
:
10102 case EXEC_OMP_PARALLEL_DO
:
10103 case EXEC_OMP_PARALLEL_DO_SIMD
:
10104 case EXEC_OMP_PARALLEL_SECTIONS
:
10105 case EXEC_OMP_PARALLEL_WORKSHARE
:
10106 case EXEC_OMP_SECTIONS
:
10107 case EXEC_OMP_SIMD
:
10108 case EXEC_OMP_SINGLE
:
10109 case EXEC_OMP_TARGET
:
10110 case EXEC_OMP_TARGET_DATA
:
10111 case EXEC_OMP_TARGET_ENTER_DATA
:
10112 case EXEC_OMP_TARGET_EXIT_DATA
:
10113 case EXEC_OMP_TARGET_PARALLEL
:
10114 case EXEC_OMP_TARGET_PARALLEL_DO
:
10115 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
10116 case EXEC_OMP_TARGET_SIMD
:
10117 case EXEC_OMP_TARGET_TEAMS
:
10118 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
10119 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10120 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10121 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
10122 case EXEC_OMP_TARGET_UPDATE
:
10123 case EXEC_OMP_TASK
:
10124 case EXEC_OMP_TASKGROUP
:
10125 case EXEC_OMP_TASKLOOP
:
10126 case EXEC_OMP_TASKLOOP_SIMD
:
10127 case EXEC_OMP_TASKWAIT
:
10128 case EXEC_OMP_TASKYIELD
:
10129 case EXEC_OMP_TEAMS
:
10130 case EXEC_OMP_TEAMS_DISTRIBUTE
:
10131 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10132 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10133 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
10134 case EXEC_OMP_WORKSHARE
:
10138 gfc_internal_error ("gfc_resolve_blocks(): Bad block type");
10141 gfc_resolve_code (b
->next
, ns
);
10146 /* Does everything to resolve an ordinary assignment. Returns true
10147 if this is an interface assignment. */
10149 resolve_ordinary_assign (gfc_code
*code
, gfc_namespace
*ns
)
10156 symbol_attribute attr
;
10158 if (gfc_extend_assign (code
, ns
))
10162 if (code
->op
== EXEC_ASSIGN_CALL
)
10164 lhs
= code
->ext
.actual
->expr
;
10165 rhsptr
= &code
->ext
.actual
->next
->expr
;
10169 gfc_actual_arglist
* args
;
10170 gfc_typebound_proc
* tbp
;
10172 gcc_assert (code
->op
== EXEC_COMPCALL
);
10174 args
= code
->expr1
->value
.compcall
.actual
;
10176 rhsptr
= &args
->next
->expr
;
10178 tbp
= code
->expr1
->value
.compcall
.tbp
;
10179 gcc_assert (!tbp
->is_generic
);
10182 /* Make a temporary rhs when there is a default initializer
10183 and rhs is the same symbol as the lhs. */
10184 if ((*rhsptr
)->expr_type
== EXPR_VARIABLE
10185 && (*rhsptr
)->symtree
->n
.sym
->ts
.type
== BT_DERIVED
10186 && gfc_has_default_initializer ((*rhsptr
)->symtree
->n
.sym
->ts
.u
.derived
)
10187 && (lhs
->symtree
->n
.sym
== (*rhsptr
)->symtree
->n
.sym
))
10188 *rhsptr
= gfc_get_parentheses (*rhsptr
);
10197 && !gfc_notify_std (GFC_STD_GNU
, "BOZ literal at %L outside "
10198 "a DATA statement and outside INT/REAL/DBLE/CMPLX",
10202 /* Handle the case of a BOZ literal on the RHS. */
10203 if (rhs
->is_boz
&& lhs
->ts
.type
!= BT_INTEGER
)
10206 if (warn_surprising
)
10207 gfc_warning (OPT_Wsurprising
,
10208 "BOZ literal at %L is bitwise transferred "
10209 "non-integer symbol %qs", &code
->loc
,
10210 lhs
->symtree
->n
.sym
->name
);
10212 if (!gfc_convert_boz (rhs
, &lhs
->ts
))
10214 if ((rc
= gfc_range_check (rhs
)) != ARITH_OK
)
10216 if (rc
== ARITH_UNDERFLOW
)
10217 gfc_error ("Arithmetic underflow of bit-wise transferred BOZ at %L"
10218 ". This check can be disabled with the option "
10219 "%<-fno-range-check%>", &rhs
->where
);
10220 else if (rc
== ARITH_OVERFLOW
)
10221 gfc_error ("Arithmetic overflow of bit-wise transferred BOZ at %L"
10222 ". This check can be disabled with the option "
10223 "%<-fno-range-check%>", &rhs
->where
);
10224 else if (rc
== ARITH_NAN
)
10225 gfc_error ("Arithmetic NaN of bit-wise transferred BOZ at %L"
10226 ". This check can be disabled with the option "
10227 "%<-fno-range-check%>", &rhs
->where
);
10232 if (lhs
->ts
.type
== BT_CHARACTER
10233 && warn_character_truncation
)
10235 HOST_WIDE_INT llen
= 0, rlen
= 0;
10236 if (lhs
->ts
.u
.cl
!= NULL
10237 && lhs
->ts
.u
.cl
->length
!= NULL
10238 && lhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10239 llen
= gfc_mpz_get_hwi (lhs
->ts
.u
.cl
->length
->value
.integer
);
10241 if (rhs
->expr_type
== EXPR_CONSTANT
)
10242 rlen
= rhs
->value
.character
.length
;
10244 else if (rhs
->ts
.u
.cl
!= NULL
10245 && rhs
->ts
.u
.cl
->length
!= NULL
10246 && rhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10247 rlen
= gfc_mpz_get_hwi (rhs
->ts
.u
.cl
->length
->value
.integer
);
10249 if (rlen
&& llen
&& rlen
> llen
)
10250 gfc_warning_now (OPT_Wcharacter_truncation
,
10251 "CHARACTER expression will be truncated "
10252 "in assignment (%ld/%ld) at %L",
10253 (long) llen
, (long) rlen
, &code
->loc
);
10256 /* Ensure that a vector index expression for the lvalue is evaluated
10257 to a temporary if the lvalue symbol is referenced in it. */
10260 for (ref
= lhs
->ref
; ref
; ref
= ref
->next
)
10261 if (ref
->type
== REF_ARRAY
)
10263 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
10264 if (ref
->u
.ar
.dimen_type
[n
] == DIMEN_VECTOR
10265 && gfc_find_sym_in_expr (lhs
->symtree
->n
.sym
,
10266 ref
->u
.ar
.start
[n
]))
10268 = gfc_get_parentheses (ref
->u
.ar
.start
[n
]);
10272 if (gfc_pure (NULL
))
10274 if (lhs
->ts
.type
== BT_DERIVED
10275 && lhs
->expr_type
== EXPR_VARIABLE
10276 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10277 && rhs
->expr_type
== EXPR_VARIABLE
10278 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10279 || gfc_is_coindexed (rhs
)))
10281 /* F2008, C1283. */
10282 if (gfc_is_coindexed (rhs
))
10283 gfc_error ("Coindexed expression at %L is assigned to "
10284 "a derived type variable with a POINTER "
10285 "component in a PURE procedure",
10288 gfc_error ("The impure variable at %L is assigned to "
10289 "a derived type variable with a POINTER "
10290 "component in a PURE procedure (12.6)",
10295 /* Fortran 2008, C1283. */
10296 if (gfc_is_coindexed (lhs
))
10298 gfc_error ("Assignment to coindexed variable at %L in a PURE "
10299 "procedure", &rhs
->where
);
10304 if (gfc_implicit_pure (NULL
))
10306 if (lhs
->expr_type
== EXPR_VARIABLE
10307 && lhs
->symtree
->n
.sym
!= gfc_current_ns
->proc_name
10308 && lhs
->symtree
->n
.sym
->ns
!= gfc_current_ns
)
10309 gfc_unset_implicit_pure (NULL
);
10311 if (lhs
->ts
.type
== BT_DERIVED
10312 && lhs
->expr_type
== EXPR_VARIABLE
10313 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10314 && rhs
->expr_type
== EXPR_VARIABLE
10315 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10316 || gfc_is_coindexed (rhs
)))
10317 gfc_unset_implicit_pure (NULL
);
10319 /* Fortran 2008, C1283. */
10320 if (gfc_is_coindexed (lhs
))
10321 gfc_unset_implicit_pure (NULL
);
10324 /* F2008, 7.2.1.2. */
10325 attr
= gfc_expr_attr (lhs
);
10326 if (lhs
->ts
.type
== BT_CLASS
&& attr
.allocatable
)
10328 if (attr
.codimension
)
10330 gfc_error ("Assignment to polymorphic coarray at %L is not "
10331 "permitted", &lhs
->where
);
10334 if (!gfc_notify_std (GFC_STD_F2008
, "Assignment to an allocatable "
10335 "polymorphic variable at %L", &lhs
->where
))
10337 if (!flag_realloc_lhs
)
10339 gfc_error ("Assignment to an allocatable polymorphic variable at %L "
10340 "requires %<-frealloc-lhs%>", &lhs
->where
);
10344 else if (lhs
->ts
.type
== BT_CLASS
)
10346 gfc_error ("Nonallocatable variable must not be polymorphic in intrinsic "
10347 "assignment at %L - check that there is a matching specific "
10348 "subroutine for '=' operator", &lhs
->where
);
10352 bool lhs_coindexed
= gfc_is_coindexed (lhs
);
10354 /* F2008, Section 7.2.1.2. */
10355 if (lhs_coindexed
&& gfc_has_ultimate_allocatable (lhs
))
10357 gfc_error ("Coindexed variable must not have an allocatable ultimate "
10358 "component in assignment at %L", &lhs
->where
);
10362 /* Assign the 'data' of a class object to a derived type. */
10363 if (lhs
->ts
.type
== BT_DERIVED
10364 && rhs
->ts
.type
== BT_CLASS
10365 && rhs
->expr_type
!= EXPR_ARRAY
)
10366 gfc_add_data_component (rhs
);
10368 bool caf_convert_to_send
= flag_coarray
== GFC_FCOARRAY_LIB
10370 || (code
->expr2
->expr_type
== EXPR_FUNCTION
10371 && code
->expr2
->value
.function
.isym
10372 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
10373 && (code
->expr1
->rank
== 0 || code
->expr2
->rank
!= 0)
10374 && !gfc_expr_attr (rhs
).allocatable
10375 && !gfc_has_vector_subscript (rhs
)));
10377 gfc_check_assign (lhs
, rhs
, 1, !caf_convert_to_send
);
10379 /* Insert a GFC_ISYM_CAF_SEND intrinsic, when the LHS is a coindexed variable.
10380 Additionally, insert this code when the RHS is a CAF as we then use the
10381 GFC_ISYM_CAF_SEND intrinsic just to avoid a temporary; but do not do so if
10382 the LHS is (re)allocatable or has a vector subscript. If the LHS is a
10383 noncoindexed array and the RHS is a coindexed scalar, use the normal code
10385 if (caf_convert_to_send
)
10387 if (code
->expr2
->expr_type
== EXPR_FUNCTION
10388 && code
->expr2
->value
.function
.isym
10389 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
10390 remove_caf_get_intrinsic (code
->expr2
);
10391 code
->op
= EXEC_CALL
;
10392 gfc_get_sym_tree (GFC_PREFIX ("caf_send"), ns
, &code
->symtree
, true);
10393 code
->resolved_sym
= code
->symtree
->n
.sym
;
10394 code
->resolved_sym
->attr
.flavor
= FL_PROCEDURE
;
10395 code
->resolved_sym
->attr
.intrinsic
= 1;
10396 code
->resolved_sym
->attr
.subroutine
= 1;
10397 code
->resolved_isym
= gfc_intrinsic_subroutine_by_id (GFC_ISYM_CAF_SEND
);
10398 gfc_commit_symbol (code
->resolved_sym
);
10399 code
->ext
.actual
= gfc_get_actual_arglist ();
10400 code
->ext
.actual
->expr
= lhs
;
10401 code
->ext
.actual
->next
= gfc_get_actual_arglist ();
10402 code
->ext
.actual
->next
->expr
= rhs
;
10403 code
->expr1
= NULL
;
10404 code
->expr2
= NULL
;
10411 /* Add a component reference onto an expression. */
10414 add_comp_ref (gfc_expr
*e
, gfc_component
*c
)
10419 ref
= &((*ref
)->next
);
10420 *ref
= gfc_get_ref ();
10421 (*ref
)->type
= REF_COMPONENT
;
10422 (*ref
)->u
.c
.sym
= e
->ts
.u
.derived
;
10423 (*ref
)->u
.c
.component
= c
;
10426 /* Add a full array ref, as necessary. */
10429 gfc_add_full_array_ref (e
, c
->as
);
10430 e
->rank
= c
->as
->rank
;
10435 /* Build an assignment. Keep the argument 'op' for future use, so that
10436 pointer assignments can be made. */
10439 build_assignment (gfc_exec_op op
, gfc_expr
*expr1
, gfc_expr
*expr2
,
10440 gfc_component
*comp1
, gfc_component
*comp2
, locus loc
)
10442 gfc_code
*this_code
;
10444 this_code
= gfc_get_code (op
);
10445 this_code
->next
= NULL
;
10446 this_code
->expr1
= gfc_copy_expr (expr1
);
10447 this_code
->expr2
= gfc_copy_expr (expr2
);
10448 this_code
->loc
= loc
;
10449 if (comp1
&& comp2
)
10451 add_comp_ref (this_code
->expr1
, comp1
);
10452 add_comp_ref (this_code
->expr2
, comp2
);
10459 /* Makes a temporary variable expression based on the characteristics of
10460 a given variable expression. */
10463 get_temp_from_expr (gfc_expr
*e
, gfc_namespace
*ns
)
10465 static int serial
= 0;
10466 char name
[GFC_MAX_SYMBOL_LEN
];
10468 gfc_array_spec
*as
;
10469 gfc_array_ref
*aref
;
10472 sprintf (name
, GFC_PREFIX("DA%d"), serial
++);
10473 gfc_get_sym_tree (name
, ns
, &tmp
, false);
10474 gfc_add_type (tmp
->n
.sym
, &e
->ts
, NULL
);
10480 /* Obtain the arrayspec for the temporary. */
10481 if (e
->rank
&& e
->expr_type
!= EXPR_ARRAY
10482 && e
->expr_type
!= EXPR_FUNCTION
10483 && e
->expr_type
!= EXPR_OP
)
10485 aref
= gfc_find_array_ref (e
);
10486 if (e
->expr_type
== EXPR_VARIABLE
10487 && e
->symtree
->n
.sym
->as
== aref
->as
)
10491 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
10492 if (ref
->type
== REF_COMPONENT
10493 && ref
->u
.c
.component
->as
== aref
->as
)
10501 /* Add the attributes and the arrayspec to the temporary. */
10502 tmp
->n
.sym
->attr
= gfc_expr_attr (e
);
10503 tmp
->n
.sym
->attr
.function
= 0;
10504 tmp
->n
.sym
->attr
.result
= 0;
10505 tmp
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
10509 tmp
->n
.sym
->as
= gfc_copy_array_spec (as
);
10512 if (as
->type
== AS_DEFERRED
)
10513 tmp
->n
.sym
->attr
.allocatable
= 1;
10515 else if (e
->rank
&& (e
->expr_type
== EXPR_ARRAY
10516 || e
->expr_type
== EXPR_FUNCTION
10517 || e
->expr_type
== EXPR_OP
))
10519 tmp
->n
.sym
->as
= gfc_get_array_spec ();
10520 tmp
->n
.sym
->as
->type
= AS_DEFERRED
;
10521 tmp
->n
.sym
->as
->rank
= e
->rank
;
10522 tmp
->n
.sym
->attr
.allocatable
= 1;
10523 tmp
->n
.sym
->attr
.dimension
= 1;
10526 tmp
->n
.sym
->attr
.dimension
= 0;
10528 gfc_set_sym_referenced (tmp
->n
.sym
);
10529 gfc_commit_symbol (tmp
->n
.sym
);
10530 e
= gfc_lval_expr_from_sym (tmp
->n
.sym
);
10532 /* Should the lhs be a section, use its array ref for the
10533 temporary expression. */
10534 if (aref
&& aref
->type
!= AR_FULL
)
10536 gfc_free_ref_list (e
->ref
);
10537 e
->ref
= gfc_copy_ref (ref
);
10543 /* Add one line of code to the code chain, making sure that 'head' and
10544 'tail' are appropriately updated. */
10547 add_code_to_chain (gfc_code
**this_code
, gfc_code
**head
, gfc_code
**tail
)
10549 gcc_assert (this_code
);
10551 *head
= *tail
= *this_code
;
10553 *tail
= gfc_append_code (*tail
, *this_code
);
10558 /* Counts the potential number of part array references that would
10559 result from resolution of typebound defined assignments. */
10562 nonscalar_typebound_assign (gfc_symbol
*derived
, int depth
)
10565 int c_depth
= 0, t_depth
;
10567 for (c
= derived
->components
; c
; c
= c
->next
)
10569 if ((!gfc_bt_struct (c
->ts
.type
)
10571 || c
->attr
.allocatable
10572 || c
->attr
.proc_pointer_comp
10573 || c
->attr
.class_pointer
10574 || c
->attr
.proc_pointer
)
10575 && !c
->attr
.defined_assign_comp
)
10578 if (c
->as
&& c_depth
== 0)
10581 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
10582 t_depth
= nonscalar_typebound_assign (c
->ts
.u
.derived
,
10587 c_depth
= t_depth
> c_depth
? t_depth
: c_depth
;
10589 return depth
+ c_depth
;
10593 /* Implement 7.2.1.3 of the F08 standard:
10594 "An intrinsic assignment where the variable is of derived type is
10595 performed as if each component of the variable were assigned from the
10596 corresponding component of expr using pointer assignment (7.2.2) for
10597 each pointer component, defined assignment for each nonpointer
10598 nonallocatable component of a type that has a type-bound defined
10599 assignment consistent with the component, intrinsic assignment for
10600 each other nonpointer nonallocatable component, ..."
10602 The pointer assignments are taken care of by the intrinsic
10603 assignment of the structure itself. This function recursively adds
10604 defined assignments where required. The recursion is accomplished
10605 by calling gfc_resolve_code.
10607 When the lhs in a defined assignment has intent INOUT, we need a
10608 temporary for the lhs. In pseudo-code:
10610 ! Only call function lhs once.
10611 if (lhs is not a constant or an variable)
10614 ! Do the intrinsic assignment
10616 ! Now do the defined assignments
10617 do over components with typebound defined assignment [%cmp]
10618 #if one component's assignment procedure is INOUT
10620 #if expr2 non-variable
10626 t1%cmp {defined=} expr2%cmp
10632 expr1%cmp {defined=} expr2%cmp
10636 /* The temporary assignments have to be put on top of the additional
10637 code to avoid the result being changed by the intrinsic assignment.
10639 static int component_assignment_level
= 0;
10640 static gfc_code
*tmp_head
= NULL
, *tmp_tail
= NULL
;
10643 generate_component_assignments (gfc_code
**code
, gfc_namespace
*ns
)
10645 gfc_component
*comp1
, *comp2
;
10646 gfc_code
*this_code
= NULL
, *head
= NULL
, *tail
= NULL
;
10648 int error_count
, depth
;
10650 gfc_get_errors (NULL
, &error_count
);
10652 /* Filter out continuing processing after an error. */
10654 || (*code
)->expr1
->ts
.type
!= BT_DERIVED
10655 || (*code
)->expr2
->ts
.type
!= BT_DERIVED
)
10658 /* TODO: Handle more than one part array reference in assignments. */
10659 depth
= nonscalar_typebound_assign ((*code
)->expr1
->ts
.u
.derived
,
10660 (*code
)->expr1
->rank
? 1 : 0);
10663 gfc_warning (0, "TODO: type-bound defined assignment(s) at %L not "
10664 "done because multiple part array references would "
10665 "occur in intermediate expressions.", &(*code
)->loc
);
10669 component_assignment_level
++;
10671 /* Create a temporary so that functions get called only once. */
10672 if ((*code
)->expr2
->expr_type
!= EXPR_VARIABLE
10673 && (*code
)->expr2
->expr_type
!= EXPR_CONSTANT
)
10675 gfc_expr
*tmp_expr
;
10677 /* Assign the rhs to the temporary. */
10678 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
10679 this_code
= build_assignment (EXEC_ASSIGN
,
10680 tmp_expr
, (*code
)->expr2
,
10681 NULL
, NULL
, (*code
)->loc
);
10682 /* Add the code and substitute the rhs expression. */
10683 add_code_to_chain (&this_code
, &tmp_head
, &tmp_tail
);
10684 gfc_free_expr ((*code
)->expr2
);
10685 (*code
)->expr2
= tmp_expr
;
10688 /* Do the intrinsic assignment. This is not needed if the lhs is one
10689 of the temporaries generated here, since the intrinsic assignment
10690 to the final result already does this. */
10691 if ((*code
)->expr1
->symtree
->n
.sym
->name
[2] != '@')
10693 this_code
= build_assignment (EXEC_ASSIGN
,
10694 (*code
)->expr1
, (*code
)->expr2
,
10695 NULL
, NULL
, (*code
)->loc
);
10696 add_code_to_chain (&this_code
, &head
, &tail
);
10699 comp1
= (*code
)->expr1
->ts
.u
.derived
->components
;
10700 comp2
= (*code
)->expr2
->ts
.u
.derived
->components
;
10703 for (; comp1
; comp1
= comp1
->next
, comp2
= comp2
->next
)
10705 bool inout
= false;
10707 /* The intrinsic assignment does the right thing for pointers
10708 of all kinds and allocatable components. */
10709 if (!gfc_bt_struct (comp1
->ts
.type
)
10710 || comp1
->attr
.pointer
10711 || comp1
->attr
.allocatable
10712 || comp1
->attr
.proc_pointer_comp
10713 || comp1
->attr
.class_pointer
10714 || comp1
->attr
.proc_pointer
)
10717 /* Make an assigment for this component. */
10718 this_code
= build_assignment (EXEC_ASSIGN
,
10719 (*code
)->expr1
, (*code
)->expr2
,
10720 comp1
, comp2
, (*code
)->loc
);
10722 /* Convert the assignment if there is a defined assignment for
10723 this type. Otherwise, using the call from gfc_resolve_code,
10724 recurse into its components. */
10725 gfc_resolve_code (this_code
, ns
);
10727 if (this_code
->op
== EXEC_ASSIGN_CALL
)
10729 gfc_formal_arglist
*dummy_args
;
10731 /* Check that there is a typebound defined assignment. If not,
10732 then this must be a module defined assignment. We cannot
10733 use the defined_assign_comp attribute here because it must
10734 be this derived type that has the defined assignment and not
10736 if (!(comp1
->ts
.u
.derived
->f2k_derived
10737 && comp1
->ts
.u
.derived
->f2k_derived
10738 ->tb_op
[INTRINSIC_ASSIGN
]))
10740 gfc_free_statements (this_code
);
10745 /* If the first argument of the subroutine has intent INOUT
10746 a temporary must be generated and used instead. */
10747 rsym
= this_code
->resolved_sym
;
10748 dummy_args
= gfc_sym_get_dummy_args (rsym
);
10750 && dummy_args
->sym
->attr
.intent
== INTENT_INOUT
)
10752 gfc_code
*temp_code
;
10755 /* Build the temporary required for the assignment and put
10756 it at the head of the generated code. */
10759 t1
= get_temp_from_expr ((*code
)->expr1
, ns
);
10760 temp_code
= build_assignment (EXEC_ASSIGN
,
10761 t1
, (*code
)->expr1
,
10762 NULL
, NULL
, (*code
)->loc
);
10764 /* For allocatable LHS, check whether it is allocated. Note
10765 that allocatable components with defined assignment are
10766 not yet support. See PR 57696. */
10767 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
)
10771 gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
10772 block
= gfc_get_code (EXEC_IF
);
10773 block
->block
= gfc_get_code (EXEC_IF
);
10774 block
->block
->expr1
10775 = gfc_build_intrinsic_call (ns
,
10776 GFC_ISYM_ALLOCATED
, "allocated",
10777 (*code
)->loc
, 1, e
);
10778 block
->block
->next
= temp_code
;
10781 add_code_to_chain (&temp_code
, &tmp_head
, &tmp_tail
);
10784 /* Replace the first actual arg with the component of the
10786 gfc_free_expr (this_code
->ext
.actual
->expr
);
10787 this_code
->ext
.actual
->expr
= gfc_copy_expr (t1
);
10788 add_comp_ref (this_code
->ext
.actual
->expr
, comp1
);
10790 /* If the LHS variable is allocatable and wasn't allocated and
10791 the temporary is allocatable, pointer assign the address of
10792 the freshly allocated LHS to the temporary. */
10793 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
10794 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
10799 cond
= gfc_get_expr ();
10800 cond
->ts
.type
= BT_LOGICAL
;
10801 cond
->ts
.kind
= gfc_default_logical_kind
;
10802 cond
->expr_type
= EXPR_OP
;
10803 cond
->where
= (*code
)->loc
;
10804 cond
->value
.op
.op
= INTRINSIC_NOT
;
10805 cond
->value
.op
.op1
= gfc_build_intrinsic_call (ns
,
10806 GFC_ISYM_ALLOCATED
, "allocated",
10807 (*code
)->loc
, 1, gfc_copy_expr (t1
));
10808 block
= gfc_get_code (EXEC_IF
);
10809 block
->block
= gfc_get_code (EXEC_IF
);
10810 block
->block
->expr1
= cond
;
10811 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
10812 t1
, (*code
)->expr1
,
10813 NULL
, NULL
, (*code
)->loc
);
10814 add_code_to_chain (&block
, &head
, &tail
);
10818 else if (this_code
->op
== EXEC_ASSIGN
&& !this_code
->next
)
10820 /* Don't add intrinsic assignments since they are already
10821 effected by the intrinsic assignment of the structure. */
10822 gfc_free_statements (this_code
);
10827 add_code_to_chain (&this_code
, &head
, &tail
);
10831 /* Transfer the value to the final result. */
10832 this_code
= build_assignment (EXEC_ASSIGN
,
10833 (*code
)->expr1
, t1
,
10834 comp1
, comp2
, (*code
)->loc
);
10835 add_code_to_chain (&this_code
, &head
, &tail
);
10839 /* Put the temporary assignments at the top of the generated code. */
10840 if (tmp_head
&& component_assignment_level
== 1)
10842 gfc_append_code (tmp_head
, head
);
10844 tmp_head
= tmp_tail
= NULL
;
10847 // If we did a pointer assignment - thus, we need to ensure that the LHS is
10848 // not accidentally deallocated. Hence, nullify t1.
10849 if (t1
&& (*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
10850 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
10856 e
= gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
10857 cond
= gfc_build_intrinsic_call (ns
, GFC_ISYM_ASSOCIATED
, "associated",
10858 (*code
)->loc
, 2, gfc_copy_expr (t1
), e
);
10859 block
= gfc_get_code (EXEC_IF
);
10860 block
->block
= gfc_get_code (EXEC_IF
);
10861 block
->block
->expr1
= cond
;
10862 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
10863 t1
, gfc_get_null_expr (&(*code
)->loc
),
10864 NULL
, NULL
, (*code
)->loc
);
10865 gfc_append_code (tail
, block
);
10869 /* Now attach the remaining code chain to the input code. Step on
10870 to the end of the new code since resolution is complete. */
10871 gcc_assert ((*code
)->op
== EXEC_ASSIGN
);
10872 tail
->next
= (*code
)->next
;
10873 /* Overwrite 'code' because this would place the intrinsic assignment
10874 before the temporary for the lhs is created. */
10875 gfc_free_expr ((*code
)->expr1
);
10876 gfc_free_expr ((*code
)->expr2
);
10882 component_assignment_level
--;
10886 /* F2008: Pointer function assignments are of the form:
10887 ptr_fcn (args) = expr
10888 This function breaks these assignments into two statements:
10889 temporary_pointer => ptr_fcn(args)
10890 temporary_pointer = expr */
10893 resolve_ptr_fcn_assign (gfc_code
**code
, gfc_namespace
*ns
)
10895 gfc_expr
*tmp_ptr_expr
;
10896 gfc_code
*this_code
;
10897 gfc_component
*comp
;
10900 if ((*code
)->expr1
->expr_type
!= EXPR_FUNCTION
)
10903 /* Even if standard does not support this feature, continue to build
10904 the two statements to avoid upsetting frontend_passes.c. */
10905 gfc_notify_std (GFC_STD_F2008
, "Pointer procedure assignment at "
10906 "%L", &(*code
)->loc
);
10908 comp
= gfc_get_proc_ptr_comp ((*code
)->expr1
);
10911 s
= comp
->ts
.interface
;
10913 s
= (*code
)->expr1
->symtree
->n
.sym
;
10915 if (s
== NULL
|| !s
->result
->attr
.pointer
)
10917 gfc_error ("The function result on the lhs of the assignment at "
10918 "%L must have the pointer attribute.",
10919 &(*code
)->expr1
->where
);
10920 (*code
)->op
= EXEC_NOP
;
10924 tmp_ptr_expr
= get_temp_from_expr ((*code
)->expr2
, ns
);
10926 /* get_temp_from_expression is set up for ordinary assignments. To that
10927 end, where array bounds are not known, arrays are made allocatable.
10928 Change the temporary to a pointer here. */
10929 tmp_ptr_expr
->symtree
->n
.sym
->attr
.pointer
= 1;
10930 tmp_ptr_expr
->symtree
->n
.sym
->attr
.allocatable
= 0;
10931 tmp_ptr_expr
->where
= (*code
)->loc
;
10933 this_code
= build_assignment (EXEC_ASSIGN
,
10934 tmp_ptr_expr
, (*code
)->expr2
,
10935 NULL
, NULL
, (*code
)->loc
);
10936 this_code
->next
= (*code
)->next
;
10937 (*code
)->next
= this_code
;
10938 (*code
)->op
= EXEC_POINTER_ASSIGN
;
10939 (*code
)->expr2
= (*code
)->expr1
;
10940 (*code
)->expr1
= tmp_ptr_expr
;
10946 /* Deferred character length assignments from an operator expression
10947 require a temporary because the character length of the lhs can
10948 change in the course of the assignment. */
10951 deferred_op_assign (gfc_code
**code
, gfc_namespace
*ns
)
10953 gfc_expr
*tmp_expr
;
10954 gfc_code
*this_code
;
10956 if (!((*code
)->expr1
->ts
.type
== BT_CHARACTER
10957 && (*code
)->expr1
->ts
.deferred
&& (*code
)->expr1
->rank
10958 && (*code
)->expr2
->expr_type
== EXPR_OP
))
10961 if (!gfc_check_dependency ((*code
)->expr1
, (*code
)->expr2
, 1))
10964 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
10965 tmp_expr
->where
= (*code
)->loc
;
10967 /* A new charlen is required to ensure that the variable string
10968 length is different to that of the original lhs. */
10969 tmp_expr
->ts
.u
.cl
= gfc_get_charlen();
10970 tmp_expr
->symtree
->n
.sym
->ts
.u
.cl
= tmp_expr
->ts
.u
.cl
;
10971 tmp_expr
->ts
.u
.cl
->next
= (*code
)->expr2
->ts
.u
.cl
->next
;
10972 (*code
)->expr2
->ts
.u
.cl
->next
= tmp_expr
->ts
.u
.cl
;
10974 tmp_expr
->symtree
->n
.sym
->ts
.deferred
= 1;
10976 this_code
= build_assignment (EXEC_ASSIGN
,
10978 gfc_copy_expr (tmp_expr
),
10979 NULL
, NULL
, (*code
)->loc
);
10981 (*code
)->expr1
= tmp_expr
;
10983 this_code
->next
= (*code
)->next
;
10984 (*code
)->next
= this_code
;
10990 /* Given a block of code, recursively resolve everything pointed to by this
10994 gfc_resolve_code (gfc_code
*code
, gfc_namespace
*ns
)
10996 int omp_workshare_save
;
10997 int forall_save
, do_concurrent_save
;
11001 frame
.prev
= cs_base
;
11005 find_reachable_labels (code
);
11007 for (; code
; code
= code
->next
)
11009 frame
.current
= code
;
11010 forall_save
= forall_flag
;
11011 do_concurrent_save
= gfc_do_concurrent_flag
;
11013 if (code
->op
== EXEC_FORALL
)
11016 gfc_resolve_forall (code
, ns
, forall_save
);
11019 else if (code
->block
)
11021 omp_workshare_save
= -1;
11024 case EXEC_OACC_PARALLEL_LOOP
:
11025 case EXEC_OACC_PARALLEL
:
11026 case EXEC_OACC_KERNELS_LOOP
:
11027 case EXEC_OACC_KERNELS
:
11028 case EXEC_OACC_DATA
:
11029 case EXEC_OACC_HOST_DATA
:
11030 case EXEC_OACC_LOOP
:
11031 gfc_resolve_oacc_blocks (code
, ns
);
11033 case EXEC_OMP_PARALLEL_WORKSHARE
:
11034 omp_workshare_save
= omp_workshare_flag
;
11035 omp_workshare_flag
= 1;
11036 gfc_resolve_omp_parallel_blocks (code
, ns
);
11038 case EXEC_OMP_PARALLEL
:
11039 case EXEC_OMP_PARALLEL_DO
:
11040 case EXEC_OMP_PARALLEL_DO_SIMD
:
11041 case EXEC_OMP_PARALLEL_SECTIONS
:
11042 case EXEC_OMP_TARGET_PARALLEL
:
11043 case EXEC_OMP_TARGET_PARALLEL_DO
:
11044 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11045 case EXEC_OMP_TARGET_TEAMS
:
11046 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11047 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11048 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11049 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11050 case EXEC_OMP_TASK
:
11051 case EXEC_OMP_TASKLOOP
:
11052 case EXEC_OMP_TASKLOOP_SIMD
:
11053 case EXEC_OMP_TEAMS
:
11054 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11055 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11056 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11057 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11058 omp_workshare_save
= omp_workshare_flag
;
11059 omp_workshare_flag
= 0;
11060 gfc_resolve_omp_parallel_blocks (code
, ns
);
11062 case EXEC_OMP_DISTRIBUTE
:
11063 case EXEC_OMP_DISTRIBUTE_SIMD
:
11065 case EXEC_OMP_DO_SIMD
:
11066 case EXEC_OMP_SIMD
:
11067 case EXEC_OMP_TARGET_SIMD
:
11068 gfc_resolve_omp_do_blocks (code
, ns
);
11070 case EXEC_SELECT_TYPE
:
11071 /* Blocks are handled in resolve_select_type because we have
11072 to transform the SELECT TYPE into ASSOCIATE first. */
11074 case EXEC_DO_CONCURRENT
:
11075 gfc_do_concurrent_flag
= 1;
11076 gfc_resolve_blocks (code
->block
, ns
);
11077 gfc_do_concurrent_flag
= 2;
11079 case EXEC_OMP_WORKSHARE
:
11080 omp_workshare_save
= omp_workshare_flag
;
11081 omp_workshare_flag
= 1;
11084 gfc_resolve_blocks (code
->block
, ns
);
11088 if (omp_workshare_save
!= -1)
11089 omp_workshare_flag
= omp_workshare_save
;
11093 if (code
->op
!= EXEC_COMPCALL
&& code
->op
!= EXEC_CALL_PPC
)
11094 t
= gfc_resolve_expr (code
->expr1
);
11095 forall_flag
= forall_save
;
11096 gfc_do_concurrent_flag
= do_concurrent_save
;
11098 if (!gfc_resolve_expr (code
->expr2
))
11101 if (code
->op
== EXEC_ALLOCATE
11102 && !gfc_resolve_expr (code
->expr3
))
11108 case EXEC_END_BLOCK
:
11109 case EXEC_END_NESTED_BLOCK
:
11113 case EXEC_ERROR_STOP
:
11115 case EXEC_CONTINUE
:
11117 case EXEC_ASSIGN_CALL
:
11120 case EXEC_CRITICAL
:
11121 resolve_critical (code
);
11124 case EXEC_SYNC_ALL
:
11125 case EXEC_SYNC_IMAGES
:
11126 case EXEC_SYNC_MEMORY
:
11127 resolve_sync (code
);
11132 case EXEC_EVENT_POST
:
11133 case EXEC_EVENT_WAIT
:
11134 resolve_lock_unlock_event (code
);
11137 case EXEC_FAIL_IMAGE
:
11138 case EXEC_FORM_TEAM
:
11139 case EXEC_CHANGE_TEAM
:
11140 case EXEC_END_TEAM
:
11141 case EXEC_SYNC_TEAM
:
11145 /* Keep track of which entry we are up to. */
11146 current_entry_id
= code
->ext
.entry
->id
;
11150 resolve_where (code
, NULL
);
11154 if (code
->expr1
!= NULL
)
11156 if (code
->expr1
->ts
.type
!= BT_INTEGER
)
11157 gfc_error ("ASSIGNED GOTO statement at %L requires an "
11158 "INTEGER variable", &code
->expr1
->where
);
11159 else if (code
->expr1
->symtree
->n
.sym
->attr
.assign
!= 1)
11160 gfc_error ("Variable %qs has not been assigned a target "
11161 "label at %L", code
->expr1
->symtree
->n
.sym
->name
,
11162 &code
->expr1
->where
);
11165 resolve_branch (code
->label1
, code
);
11169 if (code
->expr1
!= NULL
11170 && (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
))
11171 gfc_error ("Alternate RETURN statement at %L requires a SCALAR-"
11172 "INTEGER return specifier", &code
->expr1
->where
);
11175 case EXEC_INIT_ASSIGN
:
11176 case EXEC_END_PROCEDURE
:
11183 /* Remove a GFC_ISYM_CAF_GET inserted for a coindexed variable on
11185 if (code
->expr1
->expr_type
== EXPR_FUNCTION
11186 && code
->expr1
->value
.function
.isym
11187 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
11188 remove_caf_get_intrinsic (code
->expr1
);
11190 /* If this is a pointer function in an lvalue variable context,
11191 the new code will have to be resolved afresh. This is also the
11192 case with an error, where the code is transformed into NOP to
11193 prevent ICEs downstream. */
11194 if (resolve_ptr_fcn_assign (&code
, ns
)
11195 || code
->op
== EXEC_NOP
)
11198 if (!gfc_check_vardef_context (code
->expr1
, false, false, false,
11202 if (resolve_ordinary_assign (code
, ns
))
11204 if (code
->op
== EXEC_COMPCALL
)
11210 /* Check for dependencies in deferred character length array
11211 assignments and generate a temporary, if necessary. */
11212 if (code
->op
== EXEC_ASSIGN
&& deferred_op_assign (&code
, ns
))
11215 /* F03 7.4.1.3 for non-allocatable, non-pointer components. */
11216 if (code
->op
!= EXEC_CALL
&& code
->expr1
->ts
.type
== BT_DERIVED
11217 && code
->expr1
->ts
.u
.derived
11218 && code
->expr1
->ts
.u
.derived
->attr
.defined_assign_comp
)
11219 generate_component_assignments (&code
, ns
);
11223 case EXEC_LABEL_ASSIGN
:
11224 if (code
->label1
->defined
== ST_LABEL_UNKNOWN
)
11225 gfc_error ("Label %d referenced at %L is never defined",
11226 code
->label1
->value
, &code
->label1
->where
);
11228 && (code
->expr1
->expr_type
!= EXPR_VARIABLE
11229 || code
->expr1
->symtree
->n
.sym
->ts
.type
!= BT_INTEGER
11230 || code
->expr1
->symtree
->n
.sym
->ts
.kind
11231 != gfc_default_integer_kind
11232 || code
->expr1
->symtree
->n
.sym
->as
!= NULL
))
11233 gfc_error ("ASSIGN statement at %L requires a scalar "
11234 "default INTEGER variable", &code
->expr1
->where
);
11237 case EXEC_POINTER_ASSIGN
:
11244 /* This is both a variable definition and pointer assignment
11245 context, so check both of them. For rank remapping, a final
11246 array ref may be present on the LHS and fool gfc_expr_attr
11247 used in gfc_check_vardef_context. Remove it. */
11248 e
= remove_last_array_ref (code
->expr1
);
11249 t
= gfc_check_vardef_context (e
, true, false, false,
11250 _("pointer assignment"));
11252 t
= gfc_check_vardef_context (e
, false, false, false,
11253 _("pointer assignment"));
11258 gfc_check_pointer_assign (code
->expr1
, code
->expr2
);
11260 /* Assigning a class object always is a regular assign. */
11261 if (code
->expr2
->ts
.type
== BT_CLASS
11262 && code
->expr1
->ts
.type
== BT_CLASS
11263 && !CLASS_DATA (code
->expr2
)->attr
.dimension
11264 && !(gfc_expr_attr (code
->expr1
).proc_pointer
11265 && code
->expr2
->expr_type
== EXPR_VARIABLE
11266 && code
->expr2
->symtree
->n
.sym
->attr
.flavor
11268 code
->op
= EXEC_ASSIGN
;
11272 case EXEC_ARITHMETIC_IF
:
11274 gfc_expr
*e
= code
->expr1
;
11276 gfc_resolve_expr (e
);
11277 if (e
->expr_type
== EXPR_NULL
)
11278 gfc_error ("Invalid NULL at %L", &e
->where
);
11280 if (t
&& (e
->rank
> 0
11281 || !(e
->ts
.type
== BT_REAL
|| e
->ts
.type
== BT_INTEGER
)))
11282 gfc_error ("Arithmetic IF statement at %L requires a scalar "
11283 "REAL or INTEGER expression", &e
->where
);
11285 resolve_branch (code
->label1
, code
);
11286 resolve_branch (code
->label2
, code
);
11287 resolve_branch (code
->label3
, code
);
11292 if (t
&& code
->expr1
!= NULL
11293 && (code
->expr1
->ts
.type
!= BT_LOGICAL
11294 || code
->expr1
->rank
!= 0))
11295 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
11296 &code
->expr1
->where
);
11301 resolve_call (code
);
11304 case EXEC_COMPCALL
:
11306 resolve_typebound_subroutine (code
);
11309 case EXEC_CALL_PPC
:
11310 resolve_ppc_call (code
);
11314 /* Select is complicated. Also, a SELECT construct could be
11315 a transformed computed GOTO. */
11316 resolve_select (code
, false);
11319 case EXEC_SELECT_TYPE
:
11320 resolve_select_type (code
, ns
);
11324 resolve_block_construct (code
);
11328 if (code
->ext
.iterator
!= NULL
)
11330 gfc_iterator
*iter
= code
->ext
.iterator
;
11331 if (gfc_resolve_iterator (iter
, true, false))
11332 gfc_resolve_do_iterator (code
, iter
->var
->symtree
->n
.sym
,
11337 case EXEC_DO_WHILE
:
11338 if (code
->expr1
== NULL
)
11339 gfc_internal_error ("gfc_resolve_code(): No expression on "
11342 && (code
->expr1
->rank
!= 0
11343 || code
->expr1
->ts
.type
!= BT_LOGICAL
))
11344 gfc_error ("Exit condition of DO WHILE loop at %L must be "
11345 "a scalar LOGICAL expression", &code
->expr1
->where
);
11348 case EXEC_ALLOCATE
:
11350 resolve_allocate_deallocate (code
, "ALLOCATE");
11354 case EXEC_DEALLOCATE
:
11356 resolve_allocate_deallocate (code
, "DEALLOCATE");
11361 if (!gfc_resolve_open (code
->ext
.open
))
11364 resolve_branch (code
->ext
.open
->err
, code
);
11368 if (!gfc_resolve_close (code
->ext
.close
))
11371 resolve_branch (code
->ext
.close
->err
, code
);
11374 case EXEC_BACKSPACE
:
11378 if (!gfc_resolve_filepos (code
->ext
.filepos
))
11381 resolve_branch (code
->ext
.filepos
->err
, code
);
11385 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11388 resolve_branch (code
->ext
.inquire
->err
, code
);
11391 case EXEC_IOLENGTH
:
11392 gcc_assert (code
->ext
.inquire
!= NULL
);
11393 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11396 resolve_branch (code
->ext
.inquire
->err
, code
);
11400 if (!gfc_resolve_wait (code
->ext
.wait
))
11403 resolve_branch (code
->ext
.wait
->err
, code
);
11404 resolve_branch (code
->ext
.wait
->end
, code
);
11405 resolve_branch (code
->ext
.wait
->eor
, code
);
11410 if (!gfc_resolve_dt (code
->ext
.dt
, &code
->loc
))
11413 resolve_branch (code
->ext
.dt
->err
, code
);
11414 resolve_branch (code
->ext
.dt
->end
, code
);
11415 resolve_branch (code
->ext
.dt
->eor
, code
);
11418 case EXEC_TRANSFER
:
11419 resolve_transfer (code
);
11422 case EXEC_DO_CONCURRENT
:
11424 resolve_forall_iterators (code
->ext
.forall_iterator
);
11426 if (code
->expr1
!= NULL
11427 && (code
->expr1
->ts
.type
!= BT_LOGICAL
|| code
->expr1
->rank
))
11428 gfc_error ("FORALL mask clause at %L requires a scalar LOGICAL "
11429 "expression", &code
->expr1
->where
);
11432 case EXEC_OACC_PARALLEL_LOOP
:
11433 case EXEC_OACC_PARALLEL
:
11434 case EXEC_OACC_KERNELS_LOOP
:
11435 case EXEC_OACC_KERNELS
:
11436 case EXEC_OACC_DATA
:
11437 case EXEC_OACC_HOST_DATA
:
11438 case EXEC_OACC_LOOP
:
11439 case EXEC_OACC_UPDATE
:
11440 case EXEC_OACC_WAIT
:
11441 case EXEC_OACC_CACHE
:
11442 case EXEC_OACC_ENTER_DATA
:
11443 case EXEC_OACC_EXIT_DATA
:
11444 case EXEC_OACC_ATOMIC
:
11445 case EXEC_OACC_DECLARE
:
11446 gfc_resolve_oacc_directive (code
, ns
);
11449 case EXEC_OMP_ATOMIC
:
11450 case EXEC_OMP_BARRIER
:
11451 case EXEC_OMP_CANCEL
:
11452 case EXEC_OMP_CANCELLATION_POINT
:
11453 case EXEC_OMP_CRITICAL
:
11454 case EXEC_OMP_FLUSH
:
11455 case EXEC_OMP_DISTRIBUTE
:
11456 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
11457 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
11458 case EXEC_OMP_DISTRIBUTE_SIMD
:
11460 case EXEC_OMP_DO_SIMD
:
11461 case EXEC_OMP_MASTER
:
11462 case EXEC_OMP_ORDERED
:
11463 case EXEC_OMP_SECTIONS
:
11464 case EXEC_OMP_SIMD
:
11465 case EXEC_OMP_SINGLE
:
11466 case EXEC_OMP_TARGET
:
11467 case EXEC_OMP_TARGET_DATA
:
11468 case EXEC_OMP_TARGET_ENTER_DATA
:
11469 case EXEC_OMP_TARGET_EXIT_DATA
:
11470 case EXEC_OMP_TARGET_PARALLEL
:
11471 case EXEC_OMP_TARGET_PARALLEL_DO
:
11472 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11473 case EXEC_OMP_TARGET_SIMD
:
11474 case EXEC_OMP_TARGET_TEAMS
:
11475 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11476 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11477 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11478 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11479 case EXEC_OMP_TARGET_UPDATE
:
11480 case EXEC_OMP_TASK
:
11481 case EXEC_OMP_TASKGROUP
:
11482 case EXEC_OMP_TASKLOOP
:
11483 case EXEC_OMP_TASKLOOP_SIMD
:
11484 case EXEC_OMP_TASKWAIT
:
11485 case EXEC_OMP_TASKYIELD
:
11486 case EXEC_OMP_TEAMS
:
11487 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11488 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11489 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11490 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11491 case EXEC_OMP_WORKSHARE
:
11492 gfc_resolve_omp_directive (code
, ns
);
11495 case EXEC_OMP_PARALLEL
:
11496 case EXEC_OMP_PARALLEL_DO
:
11497 case EXEC_OMP_PARALLEL_DO_SIMD
:
11498 case EXEC_OMP_PARALLEL_SECTIONS
:
11499 case EXEC_OMP_PARALLEL_WORKSHARE
:
11500 omp_workshare_save
= omp_workshare_flag
;
11501 omp_workshare_flag
= 0;
11502 gfc_resolve_omp_directive (code
, ns
);
11503 omp_workshare_flag
= omp_workshare_save
;
11507 gfc_internal_error ("gfc_resolve_code(): Bad statement code");
11511 cs_base
= frame
.prev
;
11515 /* Resolve initial values and make sure they are compatible with
11519 resolve_values (gfc_symbol
*sym
)
11523 if (sym
->value
== NULL
)
11526 if (sym
->value
->expr_type
== EXPR_STRUCTURE
)
11527 t
= resolve_structure_cons (sym
->value
, 1);
11529 t
= gfc_resolve_expr (sym
->value
);
11534 gfc_check_assign_symbol (sym
, NULL
, sym
->value
);
11538 /* Verify any BIND(C) derived types in the namespace so we can report errors
11539 for them once, rather than for each variable declared of that type. */
11542 resolve_bind_c_derived_types (gfc_symbol
*derived_sym
)
11544 if (derived_sym
!= NULL
&& derived_sym
->attr
.flavor
== FL_DERIVED
11545 && derived_sym
->attr
.is_bind_c
== 1)
11546 verify_bind_c_derived_type (derived_sym
);
11552 /* Check the interfaces of DTIO procedures associated with derived
11553 type 'sym'. These procedures can either have typebound bindings or
11554 can appear in DTIO generic interfaces. */
11557 gfc_verify_DTIO_procedures (gfc_symbol
*sym
)
11559 if (!sym
|| sym
->attr
.flavor
!= FL_DERIVED
)
11562 gfc_check_dtio_interfaces (sym
);
11567 /* Verify that any binding labels used in a given namespace do not collide
11568 with the names or binding labels of any global symbols. Multiple INTERFACE
11569 for the same procedure are permitted. */
11572 gfc_verify_binding_labels (gfc_symbol
*sym
)
11575 const char *module
;
11577 if (!sym
|| !sym
->attr
.is_bind_c
|| sym
->attr
.is_iso_c
11578 || sym
->attr
.flavor
== FL_DERIVED
|| !sym
->binding_label
)
11581 gsym
= gfc_find_case_gsymbol (gfc_gsym_root
, sym
->binding_label
);
11584 module
= sym
->module
;
11585 else if (sym
->ns
&& sym
->ns
->proc_name
11586 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
11587 module
= sym
->ns
->proc_name
->name
;
11588 else if (sym
->ns
&& sym
->ns
->parent
11589 && sym
->ns
&& sym
->ns
->parent
->proc_name
11590 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
11591 module
= sym
->ns
->parent
->proc_name
->name
;
11597 && (gsym
->type
== GSYM_FUNCTION
|| gsym
->type
== GSYM_SUBROUTINE
)))
11600 gsym
= gfc_get_gsymbol (sym
->binding_label
);
11601 gsym
->where
= sym
->declared_at
;
11602 gsym
->sym_name
= sym
->name
;
11603 gsym
->binding_label
= sym
->binding_label
;
11604 gsym
->ns
= sym
->ns
;
11605 gsym
->mod_name
= module
;
11606 if (sym
->attr
.function
)
11607 gsym
->type
= GSYM_FUNCTION
;
11608 else if (sym
->attr
.subroutine
)
11609 gsym
->type
= GSYM_SUBROUTINE
;
11610 /* Mark as variable/procedure as defined, unless its an INTERFACE. */
11611 gsym
->defined
= sym
->attr
.if_source
!= IFSRC_IFBODY
;
11615 if (sym
->attr
.flavor
== FL_VARIABLE
&& gsym
->type
!= GSYM_UNKNOWN
)
11617 gfc_error ("Variable %qs with binding label %qs at %L uses the same global "
11618 "identifier as entity at %L", sym
->name
,
11619 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11620 /* Clear the binding label to prevent checking multiple times. */
11621 sym
->binding_label
= NULL
;
11624 else if (sym
->attr
.flavor
== FL_VARIABLE
&& module
11625 && (strcmp (module
, gsym
->mod_name
) != 0
11626 || strcmp (sym
->name
, gsym
->sym_name
) != 0))
11628 /* This can only happen if the variable is defined in a module - if it
11629 isn't the same module, reject it. */
11630 gfc_error ("Variable %qs from module %qs with binding label %qs at %L "
11631 "uses the same global identifier as entity at %L from module %qs",
11632 sym
->name
, module
, sym
->binding_label
,
11633 &sym
->declared_at
, &gsym
->where
, gsym
->mod_name
);
11634 sym
->binding_label
= NULL
;
11636 else if ((sym
->attr
.function
|| sym
->attr
.subroutine
)
11637 && ((gsym
->type
!= GSYM_SUBROUTINE
&& gsym
->type
!= GSYM_FUNCTION
)
11638 || (gsym
->defined
&& sym
->attr
.if_source
!= IFSRC_IFBODY
))
11639 && sym
!= gsym
->ns
->proc_name
11640 && (module
!= gsym
->mod_name
11641 || strcmp (gsym
->sym_name
, sym
->name
) != 0
11642 || (module
&& strcmp (module
, gsym
->mod_name
) != 0)))
11644 /* Print an error if the procedure is defined multiple times; we have to
11645 exclude references to the same procedure via module association or
11646 multiple checks for the same procedure. */
11647 gfc_error ("Procedure %qs with binding label %qs at %L uses the same "
11648 "global identifier as entity at %L", sym
->name
,
11649 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11650 sym
->binding_label
= NULL
;
11655 /* Resolve an index expression. */
11658 resolve_index_expr (gfc_expr
*e
)
11660 if (!gfc_resolve_expr (e
))
11663 if (!gfc_simplify_expr (e
, 0))
11666 if (!gfc_specification_expr (e
))
11673 /* Resolve a charlen structure. */
11676 resolve_charlen (gfc_charlen
*cl
)
11679 bool saved_specification_expr
;
11685 saved_specification_expr
= specification_expr
;
11686 specification_expr
= true;
11688 if (cl
->length_from_typespec
)
11690 if (!gfc_resolve_expr (cl
->length
))
11692 specification_expr
= saved_specification_expr
;
11696 if (!gfc_simplify_expr (cl
->length
, 0))
11698 specification_expr
= saved_specification_expr
;
11702 /* cl->length has been resolved. It should have an integer type. */
11703 if (cl
->length
->ts
.type
!= BT_INTEGER
)
11705 gfc_error ("Scalar INTEGER expression expected at %L",
11706 &cl
->length
->where
);
11712 if (!resolve_index_expr (cl
->length
))
11714 specification_expr
= saved_specification_expr
;
11719 /* F2008, 4.4.3.2: If the character length parameter value evaluates to
11720 a negative value, the length of character entities declared is zero. */
11721 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11722 && mpz_sgn (cl
->length
->value
.integer
) < 0)
11723 gfc_replace_expr (cl
->length
,
11724 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 0));
11726 /* Check that the character length is not too large. */
11727 k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
11728 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11729 && cl
->length
->ts
.type
== BT_INTEGER
11730 && mpz_cmp (cl
->length
->value
.integer
, gfc_integer_kinds
[k
].huge
) > 0)
11732 gfc_error ("String length at %L is too large", &cl
->length
->where
);
11733 specification_expr
= saved_specification_expr
;
11737 specification_expr
= saved_specification_expr
;
11742 /* Test for non-constant shape arrays. */
11745 is_non_constant_shape_array (gfc_symbol
*sym
)
11751 not_constant
= false;
11752 if (sym
->as
!= NULL
)
11754 /* Unfortunately, !gfc_is_compile_time_shape hits a legal case that
11755 has not been simplified; parameter array references. Do the
11756 simplification now. */
11757 for (i
= 0; i
< sym
->as
->rank
+ sym
->as
->corank
; i
++)
11759 e
= sym
->as
->lower
[i
];
11760 if (e
&& (!resolve_index_expr(e
)
11761 || !gfc_is_constant_expr (e
)))
11762 not_constant
= true;
11763 e
= sym
->as
->upper
[i
];
11764 if (e
&& (!resolve_index_expr(e
)
11765 || !gfc_is_constant_expr (e
)))
11766 not_constant
= true;
11769 return not_constant
;
11772 /* Given a symbol and an initialization expression, add code to initialize
11773 the symbol to the function entry. */
11775 build_init_assign (gfc_symbol
*sym
, gfc_expr
*init
)
11779 gfc_namespace
*ns
= sym
->ns
;
11781 /* Search for the function namespace if this is a contained
11782 function without an explicit result. */
11783 if (sym
->attr
.function
&& sym
== sym
->result
11784 && sym
->name
!= sym
->ns
->proc_name
->name
)
11786 ns
= ns
->contained
;
11787 for (;ns
; ns
= ns
->sibling
)
11788 if (strcmp (ns
->proc_name
->name
, sym
->name
) == 0)
11794 gfc_free_expr (init
);
11798 /* Build an l-value expression for the result. */
11799 lval
= gfc_lval_expr_from_sym (sym
);
11801 /* Add the code at scope entry. */
11802 init_st
= gfc_get_code (EXEC_INIT_ASSIGN
);
11803 init_st
->next
= ns
->code
;
11804 ns
->code
= init_st
;
11806 /* Assign the default initializer to the l-value. */
11807 init_st
->loc
= sym
->declared_at
;
11808 init_st
->expr1
= lval
;
11809 init_st
->expr2
= init
;
11813 /* Whether or not we can generate a default initializer for a symbol. */
11816 can_generate_init (gfc_symbol
*sym
)
11818 symbol_attribute
*a
;
11823 /* These symbols should never have a default initialization. */
11828 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
11829 && (CLASS_DATA (sym
)->attr
.class_pointer
11830 || CLASS_DATA (sym
)->attr
.proc_pointer
))
11831 || a
->in_equivalence
11838 || (!a
->referenced
&& !a
->result
)
11839 || (a
->dummy
&& a
->intent
!= INTENT_OUT
)
11840 || (a
->function
&& sym
!= sym
->result
)
11845 /* Assign the default initializer to a derived type variable or result. */
11848 apply_default_init (gfc_symbol
*sym
)
11850 gfc_expr
*init
= NULL
;
11852 if (sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
11855 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
)
11856 init
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
11858 if (init
== NULL
&& sym
->ts
.type
!= BT_CLASS
)
11861 build_init_assign (sym
, init
);
11862 sym
->attr
.referenced
= 1;
11866 /* Build an initializer for a local. Returns null if the symbol should not have
11867 a default initialization. */
11870 build_default_init_expr (gfc_symbol
*sym
)
11872 /* These symbols should never have a default initialization. */
11873 if (sym
->attr
.allocatable
11874 || sym
->attr
.external
11876 || sym
->attr
.pointer
11877 || sym
->attr
.in_equivalence
11878 || sym
->attr
.in_common
11881 || sym
->attr
.cray_pointee
11882 || sym
->attr
.cray_pointer
11886 /* Get the appropriate init expression. */
11887 return gfc_build_default_init_expr (&sym
->ts
, &sym
->declared_at
);
11890 /* Add an initialization expression to a local variable. */
11892 apply_default_init_local (gfc_symbol
*sym
)
11894 gfc_expr
*init
= NULL
;
11896 /* The symbol should be a variable or a function return value. */
11897 if ((sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
11898 || (sym
->attr
.function
&& sym
->result
!= sym
))
11901 /* Try to build the initializer expression. If we can't initialize
11902 this symbol, then init will be NULL. */
11903 init
= build_default_init_expr (sym
);
11907 /* For saved variables, we don't want to add an initializer at function
11908 entry, so we just add a static initializer. Note that automatic variables
11909 are stack allocated even with -fno-automatic; we have also to exclude
11910 result variable, which are also nonstatic. */
11911 if (!sym
->attr
.automatic
11912 && (sym
->attr
.save
|| sym
->ns
->save_all
11913 || (flag_max_stack_var_size
== 0 && !sym
->attr
.result
11914 && (sym
->ns
->proc_name
&& !sym
->ns
->proc_name
->attr
.recursive
)
11915 && (!sym
->attr
.dimension
|| !is_non_constant_shape_array (sym
)))))
11917 /* Don't clobber an existing initializer! */
11918 gcc_assert (sym
->value
== NULL
);
11923 build_init_assign (sym
, init
);
11927 /* Resolution of common features of flavors variable and procedure. */
11930 resolve_fl_var_and_proc (gfc_symbol
*sym
, int mp_flag
)
11932 gfc_array_spec
*as
;
11934 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
11935 as
= CLASS_DATA (sym
)->as
;
11939 /* Constraints on deferred shape variable. */
11940 if (as
== NULL
|| as
->type
!= AS_DEFERRED
)
11942 bool pointer
, allocatable
, dimension
;
11944 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
11946 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
11947 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
11948 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
11952 pointer
= sym
->attr
.pointer
&& !sym
->attr
.select_type_temporary
;
11953 allocatable
= sym
->attr
.allocatable
;
11954 dimension
= sym
->attr
.dimension
;
11959 if (dimension
&& as
->type
!= AS_ASSUMED_RANK
)
11961 gfc_error ("Allocatable array %qs at %L must have a deferred "
11962 "shape or assumed rank", sym
->name
, &sym
->declared_at
);
11965 else if (!gfc_notify_std (GFC_STD_F2003
, "Scalar object "
11966 "%qs at %L may not be ALLOCATABLE",
11967 sym
->name
, &sym
->declared_at
))
11971 if (pointer
&& dimension
&& as
->type
!= AS_ASSUMED_RANK
)
11973 gfc_error ("Array pointer %qs at %L must have a deferred shape or "
11974 "assumed rank", sym
->name
, &sym
->declared_at
);
11980 if (!mp_flag
&& !sym
->attr
.allocatable
&& !sym
->attr
.pointer
11981 && sym
->ts
.type
!= BT_CLASS
&& !sym
->assoc
)
11983 gfc_error ("Array %qs at %L cannot have a deferred shape",
11984 sym
->name
, &sym
->declared_at
);
11989 /* Constraints on polymorphic variables. */
11990 if (sym
->ts
.type
== BT_CLASS
&& !(sym
->result
&& sym
->result
!= sym
))
11993 if (sym
->attr
.class_ok
11994 && !sym
->attr
.select_type_temporary
11995 && !UNLIMITED_POLY (sym
)
11996 && !gfc_type_is_extensible (CLASS_DATA (sym
)->ts
.u
.derived
))
11998 gfc_error ("Type %qs of CLASS variable %qs at %L is not extensible",
11999 CLASS_DATA (sym
)->ts
.u
.derived
->name
, sym
->name
,
12000 &sym
->declared_at
);
12005 /* Assume that use associated symbols were checked in the module ns.
12006 Class-variables that are associate-names are also something special
12007 and excepted from the test. */
12008 if (!sym
->attr
.class_ok
&& !sym
->attr
.use_assoc
&& !sym
->assoc
)
12010 gfc_error ("CLASS variable %qs at %L must be dummy, allocatable "
12011 "or pointer", sym
->name
, &sym
->declared_at
);
12020 /* Additional checks for symbols with flavor variable and derived
12021 type. To be called from resolve_fl_variable. */
12024 resolve_fl_variable_derived (gfc_symbol
*sym
, int no_init_flag
)
12026 gcc_assert (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
);
12028 /* Check to see if a derived type is blocked from being host
12029 associated by the presence of another class I symbol in the same
12030 namespace. 14.6.1.3 of the standard and the discussion on
12031 comp.lang.fortran. */
12032 if (sym
->ns
!= sym
->ts
.u
.derived
->ns
12033 && sym
->ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
12036 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 0, &s
);
12037 if (s
&& s
->attr
.generic
)
12038 s
= gfc_find_dt_in_generic (s
);
12039 if (s
&& !gfc_fl_struct (s
->attr
.flavor
))
12041 gfc_error ("The type %qs cannot be host associated at %L "
12042 "because it is blocked by an incompatible object "
12043 "of the same name declared at %L",
12044 sym
->ts
.u
.derived
->name
, &sym
->declared_at
,
12050 /* 4th constraint in section 11.3: "If an object of a type for which
12051 component-initialization is specified (R429) appears in the
12052 specification-part of a module and does not have the ALLOCATABLE
12053 or POINTER attribute, the object shall have the SAVE attribute."
12055 The check for initializers is performed with
12056 gfc_has_default_initializer because gfc_default_initializer generates
12057 a hidden default for allocatable components. */
12058 if (!(sym
->value
|| no_init_flag
) && sym
->ns
->proc_name
12059 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12060 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
) && !sym
->attr
.save
12061 && !sym
->attr
.pointer
&& !sym
->attr
.allocatable
12062 && gfc_has_default_initializer (sym
->ts
.u
.derived
)
12063 && !gfc_notify_std (GFC_STD_F2008
, "Implied SAVE for module variable "
12064 "%qs at %L, needed due to the default "
12065 "initialization", sym
->name
, &sym
->declared_at
))
12068 /* Assign default initializer. */
12069 if (!(sym
->value
|| sym
->attr
.pointer
|| sym
->attr
.allocatable
)
12070 && (!no_init_flag
|| sym
->attr
.intent
== INTENT_OUT
))
12071 sym
->value
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12077 /* F2008, C402 (R401): A colon shall not be used as a type-param-value
12078 except in the declaration of an entity or component that has the POINTER
12079 or ALLOCATABLE attribute. */
12082 deferred_requirements (gfc_symbol
*sym
)
12084 if (sym
->ts
.deferred
12085 && !(sym
->attr
.pointer
12086 || sym
->attr
.allocatable
12087 || sym
->attr
.associate_var
12088 || sym
->attr
.omp_udr_artificial_var
))
12090 gfc_error ("Entity %qs at %L has a deferred type parameter and "
12091 "requires either the POINTER or ALLOCATABLE attribute",
12092 sym
->name
, &sym
->declared_at
);
12099 /* Resolve symbols with flavor variable. */
12102 resolve_fl_variable (gfc_symbol
*sym
, int mp_flag
)
12104 int no_init_flag
, automatic_flag
;
12106 const char *auto_save_msg
;
12107 bool saved_specification_expr
;
12109 auto_save_msg
= "Automatic object %qs at %L cannot have the "
12112 if (!resolve_fl_var_and_proc (sym
, mp_flag
))
12115 /* Set this flag to check that variables are parameters of all entries.
12116 This check is effected by the call to gfc_resolve_expr through
12117 is_non_constant_shape_array. */
12118 saved_specification_expr
= specification_expr
;
12119 specification_expr
= true;
12121 if (sym
->ns
->proc_name
12122 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12123 || sym
->ns
->proc_name
->attr
.is_main_program
)
12124 && !sym
->attr
.use_assoc
12125 && !sym
->attr
.allocatable
12126 && !sym
->attr
.pointer
12127 && is_non_constant_shape_array (sym
))
12129 /* F08:C541. The shape of an array defined in a main program or module
12130 * needs to be constant. */
12131 gfc_error ("The module or main program array %qs at %L must "
12132 "have constant shape", sym
->name
, &sym
->declared_at
);
12133 specification_expr
= saved_specification_expr
;
12137 /* Constraints on deferred type parameter. */
12138 if (!deferred_requirements (sym
))
12141 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.associate_var
)
12143 /* Make sure that character string variables with assumed length are
12144 dummy arguments. */
12145 e
= sym
->ts
.u
.cl
->length
;
12146 if (e
== NULL
&& !sym
->attr
.dummy
&& !sym
->attr
.result
12147 && !sym
->ts
.deferred
&& !sym
->attr
.select_type_temporary
12148 && !sym
->attr
.omp_udr_artificial_var
)
12150 gfc_error ("Entity with assumed character length at %L must be a "
12151 "dummy argument or a PARAMETER", &sym
->declared_at
);
12152 specification_expr
= saved_specification_expr
;
12156 if (e
&& sym
->attr
.save
== SAVE_EXPLICIT
&& !gfc_is_constant_expr (e
))
12158 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12159 specification_expr
= saved_specification_expr
;
12163 if (!gfc_is_constant_expr (e
)
12164 && !(e
->expr_type
== EXPR_VARIABLE
12165 && e
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
))
12167 if (!sym
->attr
.use_assoc
&& sym
->ns
->proc_name
12168 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12169 || sym
->ns
->proc_name
->attr
.is_main_program
))
12171 gfc_error ("%qs at %L must have constant character length "
12172 "in this context", sym
->name
, &sym
->declared_at
);
12173 specification_expr
= saved_specification_expr
;
12176 if (sym
->attr
.in_common
)
12178 gfc_error ("COMMON variable %qs at %L must have constant "
12179 "character length", sym
->name
, &sym
->declared_at
);
12180 specification_expr
= saved_specification_expr
;
12186 if (sym
->value
== NULL
&& sym
->attr
.referenced
)
12187 apply_default_init_local (sym
); /* Try to apply a default initialization. */
12189 /* Determine if the symbol may not have an initializer. */
12190 no_init_flag
= automatic_flag
= 0;
12191 if (sym
->attr
.allocatable
|| sym
->attr
.external
|| sym
->attr
.dummy
12192 || sym
->attr
.intrinsic
|| sym
->attr
.result
)
12194 else if ((sym
->attr
.dimension
|| sym
->attr
.codimension
) && !sym
->attr
.pointer
12195 && is_non_constant_shape_array (sym
))
12197 no_init_flag
= automatic_flag
= 1;
12199 /* Also, they must not have the SAVE attribute.
12200 SAVE_IMPLICIT is checked below. */
12201 if (sym
->as
&& sym
->attr
.codimension
)
12203 int corank
= sym
->as
->corank
;
12204 sym
->as
->corank
= 0;
12205 no_init_flag
= automatic_flag
= is_non_constant_shape_array (sym
);
12206 sym
->as
->corank
= corank
;
12208 if (automatic_flag
&& sym
->attr
.save
== SAVE_EXPLICIT
)
12210 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12211 specification_expr
= saved_specification_expr
;
12216 /* Ensure that any initializer is simplified. */
12218 gfc_simplify_expr (sym
->value
, 1);
12220 /* Reject illegal initializers. */
12221 if (!sym
->mark
&& sym
->value
)
12223 if (sym
->attr
.allocatable
|| (sym
->ts
.type
== BT_CLASS
12224 && CLASS_DATA (sym
)->attr
.allocatable
))
12225 gfc_error ("Allocatable %qs at %L cannot have an initializer",
12226 sym
->name
, &sym
->declared_at
);
12227 else if (sym
->attr
.external
)
12228 gfc_error ("External %qs at %L cannot have an initializer",
12229 sym
->name
, &sym
->declared_at
);
12230 else if (sym
->attr
.dummy
12231 && !(sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.intent
== INTENT_OUT
))
12232 gfc_error ("Dummy %qs at %L cannot have an initializer",
12233 sym
->name
, &sym
->declared_at
);
12234 else if (sym
->attr
.intrinsic
)
12235 gfc_error ("Intrinsic %qs at %L cannot have an initializer",
12236 sym
->name
, &sym
->declared_at
);
12237 else if (sym
->attr
.result
)
12238 gfc_error ("Function result %qs at %L cannot have an initializer",
12239 sym
->name
, &sym
->declared_at
);
12240 else if (automatic_flag
)
12241 gfc_error ("Automatic array %qs at %L cannot have an initializer",
12242 sym
->name
, &sym
->declared_at
);
12244 goto no_init_error
;
12245 specification_expr
= saved_specification_expr
;
12250 if (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
)
12252 bool res
= resolve_fl_variable_derived (sym
, no_init_flag
);
12253 specification_expr
= saved_specification_expr
;
12257 specification_expr
= saved_specification_expr
;
12262 /* Compare the dummy characteristics of a module procedure interface
12263 declaration with the corresponding declaration in a submodule. */
12264 static gfc_formal_arglist
*new_formal
;
12265 static char errmsg
[200];
12268 compare_fsyms (gfc_symbol
*sym
)
12272 if (sym
== NULL
|| new_formal
== NULL
)
12275 fsym
= new_formal
->sym
;
12280 if (strcmp (sym
->name
, fsym
->name
) == 0)
12282 if (!gfc_check_dummy_characteristics (fsym
, sym
, true, errmsg
, 200))
12283 gfc_error ("%s at %L", errmsg
, &fsym
->declared_at
);
12288 /* Resolve a procedure. */
12291 resolve_fl_procedure (gfc_symbol
*sym
, int mp_flag
)
12293 gfc_formal_arglist
*arg
;
12295 if (sym
->attr
.function
12296 && !resolve_fl_var_and_proc (sym
, mp_flag
))
12299 if (sym
->ts
.type
== BT_CHARACTER
)
12301 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
12303 if (cl
&& cl
->length
&& gfc_is_constant_expr (cl
->length
)
12304 && !resolve_charlen (cl
))
12307 if ((!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
12308 && sym
->attr
.proc
== PROC_ST_FUNCTION
)
12310 gfc_error ("Character-valued statement function %qs at %L must "
12311 "have constant length", sym
->name
, &sym
->declared_at
);
12316 /* Ensure that derived type for are not of a private type. Internal
12317 module procedures are excluded by 2.2.3.3 - i.e., they are not
12318 externally accessible and can access all the objects accessible in
12320 if (!(sym
->ns
->parent
12321 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12322 && gfc_check_symbol_access (sym
))
12324 gfc_interface
*iface
;
12326 for (arg
= gfc_sym_get_dummy_args (sym
); arg
; arg
= arg
->next
)
12329 && arg
->sym
->ts
.type
== BT_DERIVED
12330 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12331 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12332 && !gfc_notify_std (GFC_STD_F2003
, "%qs is of a PRIVATE type "
12333 "and cannot be a dummy argument"
12334 " of %qs, which is PUBLIC at %L",
12335 arg
->sym
->name
, sym
->name
,
12336 &sym
->declared_at
))
12338 /* Stop this message from recurring. */
12339 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12344 /* PUBLIC interfaces may expose PRIVATE procedures that take types
12345 PRIVATE to the containing module. */
12346 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
12348 for (arg
= gfc_sym_get_dummy_args (iface
->sym
); arg
; arg
= arg
->next
)
12351 && arg
->sym
->ts
.type
== BT_DERIVED
12352 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12353 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12354 && !gfc_notify_std (GFC_STD_F2003
, "Procedure %qs in "
12355 "PUBLIC interface %qs at %L "
12356 "takes dummy arguments of %qs which "
12357 "is PRIVATE", iface
->sym
->name
,
12358 sym
->name
, &iface
->sym
->declared_at
,
12359 gfc_typename(&arg
->sym
->ts
)))
12361 /* Stop this message from recurring. */
12362 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12369 if (sym
->attr
.function
&& sym
->value
&& sym
->attr
.proc
!= PROC_ST_FUNCTION
12370 && !sym
->attr
.proc_pointer
)
12372 gfc_error ("Function %qs at %L cannot have an initializer",
12373 sym
->name
, &sym
->declared_at
);
12377 /* An external symbol may not have an initializer because it is taken to be
12378 a procedure. Exception: Procedure Pointers. */
12379 if (sym
->attr
.external
&& sym
->value
&& !sym
->attr
.proc_pointer
)
12381 gfc_error ("External object %qs at %L may not have an initializer",
12382 sym
->name
, &sym
->declared_at
);
12386 /* An elemental function is required to return a scalar 12.7.1 */
12387 if (sym
->attr
.elemental
&& sym
->attr
.function
&& sym
->as
)
12389 gfc_error ("ELEMENTAL function %qs at %L must have a scalar "
12390 "result", sym
->name
, &sym
->declared_at
);
12391 /* Reset so that the error only occurs once. */
12392 sym
->attr
.elemental
= 0;
12396 if (sym
->attr
.proc
== PROC_ST_FUNCTION
12397 && (sym
->attr
.allocatable
|| sym
->attr
.pointer
))
12399 gfc_error ("Statement function %qs at %L may not have pointer or "
12400 "allocatable attribute", sym
->name
, &sym
->declared_at
);
12404 /* 5.1.1.5 of the Standard: A function name declared with an asterisk
12405 char-len-param shall not be array-valued, pointer-valued, recursive
12406 or pure. ....snip... A character value of * may only be used in the
12407 following ways: (i) Dummy arg of procedure - dummy associates with
12408 actual length; (ii) To declare a named constant; or (iii) External
12409 function - but length must be declared in calling scoping unit. */
12410 if (sym
->attr
.function
12411 && sym
->ts
.type
== BT_CHARACTER
&& !sym
->ts
.deferred
12412 && sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
== NULL
)
12414 if ((sym
->as
&& sym
->as
->rank
) || (sym
->attr
.pointer
)
12415 || (sym
->attr
.recursive
) || (sym
->attr
.pure
))
12417 if (sym
->as
&& sym
->as
->rank
)
12418 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12419 "array-valued", sym
->name
, &sym
->declared_at
);
12421 if (sym
->attr
.pointer
)
12422 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12423 "pointer-valued", sym
->name
, &sym
->declared_at
);
12425 if (sym
->attr
.pure
)
12426 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12427 "pure", sym
->name
, &sym
->declared_at
);
12429 if (sym
->attr
.recursive
)
12430 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12431 "recursive", sym
->name
, &sym
->declared_at
);
12436 /* Appendix B.2 of the standard. Contained functions give an
12437 error anyway. Deferred character length is an F2003 feature.
12438 Don't warn on intrinsic conversion functions, which start
12439 with two underscores. */
12440 if (!sym
->attr
.contained
&& !sym
->ts
.deferred
12441 && (sym
->name
[0] != '_' || sym
->name
[1] != '_'))
12442 gfc_notify_std (GFC_STD_F95_OBS
,
12443 "CHARACTER(*) function %qs at %L",
12444 sym
->name
, &sym
->declared_at
);
12447 /* F2008, C1218. */
12448 if (sym
->attr
.elemental
)
12450 if (sym
->attr
.proc_pointer
)
12452 gfc_error ("Procedure pointer %qs at %L shall not be elemental",
12453 sym
->name
, &sym
->declared_at
);
12456 if (sym
->attr
.dummy
)
12458 gfc_error ("Dummy procedure %qs at %L shall not be elemental",
12459 sym
->name
, &sym
->declared_at
);
12464 /* F2018, C15100: "The result of an elemental function shall be scalar,
12465 and shall not have the POINTER or ALLOCATABLE attribute." The scalar
12466 pointer is tested and caught elsewhere. */
12467 if (sym
->attr
.elemental
&& sym
->result
12468 && (sym
->result
->attr
.allocatable
|| sym
->result
->attr
.pointer
))
12470 gfc_error ("Function result variable %qs at %L of elemental "
12471 "function %qs shall not have an ALLOCATABLE or POINTER "
12472 "attribute", sym
->result
->name
,
12473 &sym
->result
->declared_at
, sym
->name
);
12477 if (sym
->attr
.is_bind_c
&& sym
->attr
.is_c_interop
!= 1)
12479 gfc_formal_arglist
*curr_arg
;
12480 int has_non_interop_arg
= 0;
12482 if (!verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
12483 sym
->common_block
))
12485 /* Clear these to prevent looking at them again if there was an
12487 sym
->attr
.is_bind_c
= 0;
12488 sym
->attr
.is_c_interop
= 0;
12489 sym
->ts
.is_c_interop
= 0;
12493 /* So far, no errors have been found. */
12494 sym
->attr
.is_c_interop
= 1;
12495 sym
->ts
.is_c_interop
= 1;
12498 curr_arg
= gfc_sym_get_dummy_args (sym
);
12499 while (curr_arg
!= NULL
)
12501 /* Skip implicitly typed dummy args here. */
12502 if (curr_arg
->sym
->attr
.implicit_type
== 0)
12503 if (!gfc_verify_c_interop_param (curr_arg
->sym
))
12504 /* If something is found to fail, record the fact so we
12505 can mark the symbol for the procedure as not being
12506 BIND(C) to try and prevent multiple errors being
12508 has_non_interop_arg
= 1;
12510 curr_arg
= curr_arg
->next
;
12513 /* See if any of the arguments were not interoperable and if so, clear
12514 the procedure symbol to prevent duplicate error messages. */
12515 if (has_non_interop_arg
!= 0)
12517 sym
->attr
.is_c_interop
= 0;
12518 sym
->ts
.is_c_interop
= 0;
12519 sym
->attr
.is_bind_c
= 0;
12523 if (!sym
->attr
.proc_pointer
)
12525 if (sym
->attr
.save
== SAVE_EXPLICIT
)
12527 gfc_error ("PROCEDURE attribute conflicts with SAVE attribute "
12528 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12531 if (sym
->attr
.intent
)
12533 gfc_error ("PROCEDURE attribute conflicts with INTENT attribute "
12534 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12537 if (sym
->attr
.subroutine
&& sym
->attr
.result
)
12539 gfc_error ("PROCEDURE attribute conflicts with RESULT attribute "
12540 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12543 if (sym
->attr
.external
&& sym
->attr
.function
&& !sym
->attr
.module_procedure
12544 && ((sym
->attr
.if_source
== IFSRC_DECL
&& !sym
->attr
.procedure
)
12545 || sym
->attr
.contained
))
12547 gfc_error ("EXTERNAL attribute conflicts with FUNCTION attribute "
12548 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12551 if (strcmp ("ppr@", sym
->name
) == 0)
12553 gfc_error ("Procedure pointer result %qs at %L "
12554 "is missing the pointer attribute",
12555 sym
->ns
->proc_name
->name
, &sym
->declared_at
);
12560 /* Assume that a procedure whose body is not known has references
12561 to external arrays. */
12562 if (sym
->attr
.if_source
!= IFSRC_DECL
)
12563 sym
->attr
.array_outer_dependency
= 1;
12565 /* Compare the characteristics of a module procedure with the
12566 interface declaration. Ideally this would be done with
12567 gfc_compare_interfaces but, at present, the formal interface
12568 cannot be copied to the ts.interface. */
12569 if (sym
->attr
.module_procedure
12570 && sym
->attr
.if_source
== IFSRC_DECL
)
12573 char name
[2*GFC_MAX_SYMBOL_LEN
+ 1];
12575 char *submodule_name
;
12576 strcpy (name
, sym
->ns
->proc_name
->name
);
12577 module_name
= strtok (name
, ".");
12578 submodule_name
= strtok (NULL
, ".");
12580 iface
= sym
->tlink
;
12583 /* Make sure that the result uses the correct charlen for deferred
12585 if (iface
&& sym
->result
12586 && iface
->ts
.type
== BT_CHARACTER
12587 && iface
->ts
.deferred
)
12588 sym
->result
->ts
.u
.cl
= iface
->ts
.u
.cl
;
12593 /* Check the procedure characteristics. */
12594 if (sym
->attr
.elemental
!= iface
->attr
.elemental
)
12596 gfc_error ("Mismatch in ELEMENTAL attribute between MODULE "
12597 "PROCEDURE at %L and its interface in %s",
12598 &sym
->declared_at
, module_name
);
12602 if (sym
->attr
.pure
!= iface
->attr
.pure
)
12604 gfc_error ("Mismatch in PURE attribute between MODULE "
12605 "PROCEDURE at %L and its interface in %s",
12606 &sym
->declared_at
, module_name
);
12610 if (sym
->attr
.recursive
!= iface
->attr
.recursive
)
12612 gfc_error ("Mismatch in RECURSIVE attribute between MODULE "
12613 "PROCEDURE at %L and its interface in %s",
12614 &sym
->declared_at
, module_name
);
12618 /* Check the result characteristics. */
12619 if (!gfc_check_result_characteristics (sym
, iface
, errmsg
, 200))
12621 gfc_error ("%s between the MODULE PROCEDURE declaration "
12622 "in MODULE %qs and the declaration at %L in "
12624 errmsg
, module_name
, &sym
->declared_at
,
12625 submodule_name
? submodule_name
: module_name
);
12630 /* Check the characteristics of the formal arguments. */
12631 if (sym
->formal
&& sym
->formal_ns
)
12633 for (arg
= sym
->formal
; arg
&& arg
->sym
; arg
= arg
->next
)
12636 gfc_traverse_ns (sym
->formal_ns
, compare_fsyms
);
12644 /* Resolve a list of finalizer procedures. That is, after they have hopefully
12645 been defined and we now know their defined arguments, check that they fulfill
12646 the requirements of the standard for procedures used as finalizers. */
12649 gfc_resolve_finalizers (gfc_symbol
* derived
, bool *finalizable
)
12651 gfc_finalizer
* list
;
12652 gfc_finalizer
** prev_link
; /* For removing wrong entries from the list. */
12653 bool result
= true;
12654 bool seen_scalar
= false;
12657 gfc_symbol
*parent
= gfc_get_derived_super_type (derived
);
12660 gfc_resolve_finalizers (parent
, finalizable
);
12662 /* Ensure that derived-type components have a their finalizers resolved. */
12663 bool has_final
= derived
->f2k_derived
&& derived
->f2k_derived
->finalizers
;
12664 for (c
= derived
->components
; c
; c
= c
->next
)
12665 if (c
->ts
.type
== BT_DERIVED
12666 && !c
->attr
.pointer
&& !c
->attr
.proc_pointer
&& !c
->attr
.allocatable
)
12668 bool has_final2
= false;
12669 if (!gfc_resolve_finalizers (c
->ts
.u
.derived
, &has_final2
))
12670 return false; /* Error. */
12671 has_final
= has_final
|| has_final2
;
12673 /* Return early if not finalizable. */
12677 *finalizable
= false;
12681 /* Walk over the list of finalizer-procedures, check them, and if any one
12682 does not fit in with the standard's definition, print an error and remove
12683 it from the list. */
12684 prev_link
= &derived
->f2k_derived
->finalizers
;
12685 for (list
= derived
->f2k_derived
->finalizers
; list
; list
= *prev_link
)
12687 gfc_formal_arglist
*dummy_args
;
12692 /* Skip this finalizer if we already resolved it. */
12693 if (list
->proc_tree
)
12695 if (list
->proc_tree
->n
.sym
->formal
->sym
->as
== NULL
12696 || list
->proc_tree
->n
.sym
->formal
->sym
->as
->rank
== 0)
12697 seen_scalar
= true;
12698 prev_link
= &(list
->next
);
12702 /* Check this exists and is a SUBROUTINE. */
12703 if (!list
->proc_sym
->attr
.subroutine
)
12705 gfc_error ("FINAL procedure %qs at %L is not a SUBROUTINE",
12706 list
->proc_sym
->name
, &list
->where
);
12710 /* We should have exactly one argument. */
12711 dummy_args
= gfc_sym_get_dummy_args (list
->proc_sym
);
12712 if (!dummy_args
|| dummy_args
->next
)
12714 gfc_error ("FINAL procedure at %L must have exactly one argument",
12718 arg
= dummy_args
->sym
;
12720 /* This argument must be of our type. */
12721 if (arg
->ts
.type
!= BT_DERIVED
|| arg
->ts
.u
.derived
!= derived
)
12723 gfc_error ("Argument of FINAL procedure at %L must be of type %qs",
12724 &arg
->declared_at
, derived
->name
);
12728 /* It must neither be a pointer nor allocatable nor optional. */
12729 if (arg
->attr
.pointer
)
12731 gfc_error ("Argument of FINAL procedure at %L must not be a POINTER",
12732 &arg
->declared_at
);
12735 if (arg
->attr
.allocatable
)
12737 gfc_error ("Argument of FINAL procedure at %L must not be"
12738 " ALLOCATABLE", &arg
->declared_at
);
12741 if (arg
->attr
.optional
)
12743 gfc_error ("Argument of FINAL procedure at %L must not be OPTIONAL",
12744 &arg
->declared_at
);
12748 /* It must not be INTENT(OUT). */
12749 if (arg
->attr
.intent
== INTENT_OUT
)
12751 gfc_error ("Argument of FINAL procedure at %L must not be"
12752 " INTENT(OUT)", &arg
->declared_at
);
12756 /* Warn if the procedure is non-scalar and not assumed shape. */
12757 if (warn_surprising
&& arg
->as
&& arg
->as
->rank
!= 0
12758 && arg
->as
->type
!= AS_ASSUMED_SHAPE
)
12759 gfc_warning (OPT_Wsurprising
,
12760 "Non-scalar FINAL procedure at %L should have assumed"
12761 " shape argument", &arg
->declared_at
);
12763 /* Check that it does not match in kind and rank with a FINAL procedure
12764 defined earlier. To really loop over the *earlier* declarations,
12765 we need to walk the tail of the list as new ones were pushed at the
12767 /* TODO: Handle kind parameters once they are implemented. */
12768 my_rank
= (arg
->as
? arg
->as
->rank
: 0);
12769 for (i
= list
->next
; i
; i
= i
->next
)
12771 gfc_formal_arglist
*dummy_args
;
12773 /* Argument list might be empty; that is an error signalled earlier,
12774 but we nevertheless continued resolving. */
12775 dummy_args
= gfc_sym_get_dummy_args (i
->proc_sym
);
12778 gfc_symbol
* i_arg
= dummy_args
->sym
;
12779 const int i_rank
= (i_arg
->as
? i_arg
->as
->rank
: 0);
12780 if (i_rank
== my_rank
)
12782 gfc_error ("FINAL procedure %qs declared at %L has the same"
12783 " rank (%d) as %qs",
12784 list
->proc_sym
->name
, &list
->where
, my_rank
,
12785 i
->proc_sym
->name
);
12791 /* Is this the/a scalar finalizer procedure? */
12793 seen_scalar
= true;
12795 /* Find the symtree for this procedure. */
12796 gcc_assert (!list
->proc_tree
);
12797 list
->proc_tree
= gfc_find_sym_in_symtree (list
->proc_sym
);
12799 prev_link
= &list
->next
;
12802 /* Remove wrong nodes immediately from the list so we don't risk any
12803 troubles in the future when they might fail later expectations. */
12806 *prev_link
= list
->next
;
12807 gfc_free_finalizer (i
);
12811 if (result
== false)
12814 /* Warn if we haven't seen a scalar finalizer procedure (but we know there
12815 were nodes in the list, must have been for arrays. It is surely a good
12816 idea to have a scalar version there if there's something to finalize. */
12817 if (warn_surprising
&& derived
->f2k_derived
->finalizers
&& !seen_scalar
)
12818 gfc_warning (OPT_Wsurprising
,
12819 "Only array FINAL procedures declared for derived type %qs"
12820 " defined at %L, suggest also scalar one",
12821 derived
->name
, &derived
->declared_at
);
12823 vtab
= gfc_find_derived_vtab (derived
);
12824 c
= vtab
->ts
.u
.derived
->components
->next
->next
->next
->next
->next
;
12825 gfc_set_sym_referenced (c
->initializer
->symtree
->n
.sym
);
12828 *finalizable
= true;
12834 /* Check if two GENERIC targets are ambiguous and emit an error is they are. */
12837 check_generic_tbp_ambiguity (gfc_tbp_generic
* t1
, gfc_tbp_generic
* t2
,
12838 const char* generic_name
, locus where
)
12840 gfc_symbol
*sym1
, *sym2
;
12841 const char *pass1
, *pass2
;
12842 gfc_formal_arglist
*dummy_args
;
12844 gcc_assert (t1
->specific
&& t2
->specific
);
12845 gcc_assert (!t1
->specific
->is_generic
);
12846 gcc_assert (!t2
->specific
->is_generic
);
12847 gcc_assert (t1
->is_operator
== t2
->is_operator
);
12849 sym1
= t1
->specific
->u
.specific
->n
.sym
;
12850 sym2
= t2
->specific
->u
.specific
->n
.sym
;
12855 /* Both must be SUBROUTINEs or both must be FUNCTIONs. */
12856 if (sym1
->attr
.subroutine
!= sym2
->attr
.subroutine
12857 || sym1
->attr
.function
!= sym2
->attr
.function
)
12859 gfc_error ("%qs and %qs can't be mixed FUNCTION/SUBROUTINE for"
12860 " GENERIC %qs at %L",
12861 sym1
->name
, sym2
->name
, generic_name
, &where
);
12865 /* Determine PASS arguments. */
12866 if (t1
->specific
->nopass
)
12868 else if (t1
->specific
->pass_arg
)
12869 pass1
= t1
->specific
->pass_arg
;
12872 dummy_args
= gfc_sym_get_dummy_args (t1
->specific
->u
.specific
->n
.sym
);
12874 pass1
= dummy_args
->sym
->name
;
12878 if (t2
->specific
->nopass
)
12880 else if (t2
->specific
->pass_arg
)
12881 pass2
= t2
->specific
->pass_arg
;
12884 dummy_args
= gfc_sym_get_dummy_args (t2
->specific
->u
.specific
->n
.sym
);
12886 pass2
= dummy_args
->sym
->name
;
12891 /* Compare the interfaces. */
12892 if (gfc_compare_interfaces (sym1
, sym2
, sym2
->name
, !t1
->is_operator
, 0,
12893 NULL
, 0, pass1
, pass2
))
12895 gfc_error ("%qs and %qs for GENERIC %qs at %L are ambiguous",
12896 sym1
->name
, sym2
->name
, generic_name
, &where
);
12904 /* Worker function for resolving a generic procedure binding; this is used to
12905 resolve GENERIC as well as user and intrinsic OPERATOR typebound procedures.
12907 The difference between those cases is finding possible inherited bindings
12908 that are overridden, as one has to look for them in tb_sym_root,
12909 tb_uop_root or tb_op, respectively. Thus the caller must already find
12910 the super-type and set p->overridden correctly. */
12913 resolve_tb_generic_targets (gfc_symbol
* super_type
,
12914 gfc_typebound_proc
* p
, const char* name
)
12916 gfc_tbp_generic
* target
;
12917 gfc_symtree
* first_target
;
12918 gfc_symtree
* inherited
;
12920 gcc_assert (p
&& p
->is_generic
);
12922 /* Try to find the specific bindings for the symtrees in our target-list. */
12923 gcc_assert (p
->u
.generic
);
12924 for (target
= p
->u
.generic
; target
; target
= target
->next
)
12925 if (!target
->specific
)
12927 gfc_typebound_proc
* overridden_tbp
;
12928 gfc_tbp_generic
* g
;
12929 const char* target_name
;
12931 target_name
= target
->specific_st
->name
;
12933 /* Defined for this type directly. */
12934 if (target
->specific_st
->n
.tb
&& !target
->specific_st
->n
.tb
->error
)
12936 target
->specific
= target
->specific_st
->n
.tb
;
12937 goto specific_found
;
12940 /* Look for an inherited specific binding. */
12943 inherited
= gfc_find_typebound_proc (super_type
, NULL
, target_name
,
12948 gcc_assert (inherited
->n
.tb
);
12949 target
->specific
= inherited
->n
.tb
;
12950 goto specific_found
;
12954 gfc_error ("Undefined specific binding %qs as target of GENERIC %qs"
12955 " at %L", target_name
, name
, &p
->where
);
12958 /* Once we've found the specific binding, check it is not ambiguous with
12959 other specifics already found or inherited for the same GENERIC. */
12961 gcc_assert (target
->specific
);
12963 /* This must really be a specific binding! */
12964 if (target
->specific
->is_generic
)
12966 gfc_error ("GENERIC %qs at %L must target a specific binding,"
12967 " %qs is GENERIC, too", name
, &p
->where
, target_name
);
12971 /* Check those already resolved on this type directly. */
12972 for (g
= p
->u
.generic
; g
; g
= g
->next
)
12973 if (g
!= target
&& g
->specific
12974 && !check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
12977 /* Check for ambiguity with inherited specific targets. */
12978 for (overridden_tbp
= p
->overridden
; overridden_tbp
;
12979 overridden_tbp
= overridden_tbp
->overridden
)
12980 if (overridden_tbp
->is_generic
)
12982 for (g
= overridden_tbp
->u
.generic
; g
; g
= g
->next
)
12984 gcc_assert (g
->specific
);
12985 if (!check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
12991 /* If we attempt to "overwrite" a specific binding, this is an error. */
12992 if (p
->overridden
&& !p
->overridden
->is_generic
)
12994 gfc_error ("GENERIC %qs at %L can't overwrite specific binding with"
12995 " the same name", name
, &p
->where
);
12999 /* Take the SUBROUTINE/FUNCTION attributes of the first specific target, as
13000 all must have the same attributes here. */
13001 first_target
= p
->u
.generic
->specific
->u
.specific
;
13002 gcc_assert (first_target
);
13003 p
->subroutine
= first_target
->n
.sym
->attr
.subroutine
;
13004 p
->function
= first_target
->n
.sym
->attr
.function
;
13010 /* Resolve a GENERIC procedure binding for a derived type. */
13013 resolve_typebound_generic (gfc_symbol
* derived
, gfc_symtree
* st
)
13015 gfc_symbol
* super_type
;
13017 /* Find the overridden binding if any. */
13018 st
->n
.tb
->overridden
= NULL
;
13019 super_type
= gfc_get_derived_super_type (derived
);
13022 gfc_symtree
* overridden
;
13023 overridden
= gfc_find_typebound_proc (super_type
, NULL
, st
->name
,
13026 if (overridden
&& overridden
->n
.tb
)
13027 st
->n
.tb
->overridden
= overridden
->n
.tb
;
13030 /* Resolve using worker function. */
13031 return resolve_tb_generic_targets (super_type
, st
->n
.tb
, st
->name
);
13035 /* Retrieve the target-procedure of an operator binding and do some checks in
13036 common for intrinsic and user-defined type-bound operators. */
13039 get_checked_tb_operator_target (gfc_tbp_generic
* target
, locus where
)
13041 gfc_symbol
* target_proc
;
13043 gcc_assert (target
->specific
&& !target
->specific
->is_generic
);
13044 target_proc
= target
->specific
->u
.specific
->n
.sym
;
13045 gcc_assert (target_proc
);
13047 /* F08:C468. All operator bindings must have a passed-object dummy argument. */
13048 if (target
->specific
->nopass
)
13050 gfc_error ("Type-bound operator at %L can't be NOPASS", &where
);
13054 return target_proc
;
13058 /* Resolve a type-bound intrinsic operator. */
13061 resolve_typebound_intrinsic_op (gfc_symbol
* derived
, gfc_intrinsic_op op
,
13062 gfc_typebound_proc
* p
)
13064 gfc_symbol
* super_type
;
13065 gfc_tbp_generic
* target
;
13067 /* If there's already an error here, do nothing (but don't fail again). */
13071 /* Operators should always be GENERIC bindings. */
13072 gcc_assert (p
->is_generic
);
13074 /* Look for an overridden binding. */
13075 super_type
= gfc_get_derived_super_type (derived
);
13076 if (super_type
&& super_type
->f2k_derived
)
13077 p
->overridden
= gfc_find_typebound_intrinsic_op (super_type
, NULL
,
13080 p
->overridden
= NULL
;
13082 /* Resolve general GENERIC properties using worker function. */
13083 if (!resolve_tb_generic_targets (super_type
, p
, gfc_op2string(op
)))
13086 /* Check the targets to be procedures of correct interface. */
13087 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13089 gfc_symbol
* target_proc
;
13091 target_proc
= get_checked_tb_operator_target (target
, p
->where
);
13095 if (!gfc_check_operator_interface (target_proc
, op
, p
->where
))
13098 /* Add target to non-typebound operator list. */
13099 if (!target
->specific
->deferred
&& !derived
->attr
.use_assoc
13100 && p
->access
!= ACCESS_PRIVATE
&& derived
->ns
== gfc_current_ns
)
13102 gfc_interface
*head
, *intr
;
13104 /* Preempt 'gfc_check_new_interface' for submodules, where the
13105 mechanism for handling module procedures winds up resolving
13106 operator interfaces twice and would otherwise cause an error. */
13107 for (intr
= derived
->ns
->op
[op
]; intr
; intr
= intr
->next
)
13108 if (intr
->sym
== target_proc
13109 && target_proc
->attr
.used_in_submodule
)
13112 if (!gfc_check_new_interface (derived
->ns
->op
[op
],
13113 target_proc
, p
->where
))
13115 head
= derived
->ns
->op
[op
];
13116 intr
= gfc_get_interface ();
13117 intr
->sym
= target_proc
;
13118 intr
->where
= p
->where
;
13120 derived
->ns
->op
[op
] = intr
;
13132 /* Resolve a type-bound user operator (tree-walker callback). */
13134 static gfc_symbol
* resolve_bindings_derived
;
13135 static bool resolve_bindings_result
;
13137 static bool check_uop_procedure (gfc_symbol
* sym
, locus where
);
13140 resolve_typebound_user_op (gfc_symtree
* stree
)
13142 gfc_symbol
* super_type
;
13143 gfc_tbp_generic
* target
;
13145 gcc_assert (stree
&& stree
->n
.tb
);
13147 if (stree
->n
.tb
->error
)
13150 /* Operators should always be GENERIC bindings. */
13151 gcc_assert (stree
->n
.tb
->is_generic
);
13153 /* Find overridden procedure, if any. */
13154 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13155 if (super_type
&& super_type
->f2k_derived
)
13157 gfc_symtree
* overridden
;
13158 overridden
= gfc_find_typebound_user_op (super_type
, NULL
,
13159 stree
->name
, true, NULL
);
13161 if (overridden
&& overridden
->n
.tb
)
13162 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13165 stree
->n
.tb
->overridden
= NULL
;
13167 /* Resolve basically using worker function. */
13168 if (!resolve_tb_generic_targets (super_type
, stree
->n
.tb
, stree
->name
))
13171 /* Check the targets to be functions of correct interface. */
13172 for (target
= stree
->n
.tb
->u
.generic
; target
; target
= target
->next
)
13174 gfc_symbol
* target_proc
;
13176 target_proc
= get_checked_tb_operator_target (target
, stree
->n
.tb
->where
);
13180 if (!check_uop_procedure (target_proc
, stree
->n
.tb
->where
))
13187 resolve_bindings_result
= false;
13188 stree
->n
.tb
->error
= 1;
13192 /* Resolve the type-bound procedures for a derived type. */
13195 resolve_typebound_procedure (gfc_symtree
* stree
)
13199 gfc_symbol
* me_arg
;
13200 gfc_symbol
* super_type
;
13201 gfc_component
* comp
;
13203 gcc_assert (stree
);
13205 /* Undefined specific symbol from GENERIC target definition. */
13209 if (stree
->n
.tb
->error
)
13212 /* If this is a GENERIC binding, use that routine. */
13213 if (stree
->n
.tb
->is_generic
)
13215 if (!resolve_typebound_generic (resolve_bindings_derived
, stree
))
13220 /* Get the target-procedure to check it. */
13221 gcc_assert (!stree
->n
.tb
->is_generic
);
13222 gcc_assert (stree
->n
.tb
->u
.specific
);
13223 proc
= stree
->n
.tb
->u
.specific
->n
.sym
;
13224 where
= stree
->n
.tb
->where
;
13226 /* Default access should already be resolved from the parser. */
13227 gcc_assert (stree
->n
.tb
->access
!= ACCESS_UNKNOWN
);
13229 if (stree
->n
.tb
->deferred
)
13231 if (!check_proc_interface (proc
, &where
))
13236 /* Check for F08:C465. */
13237 if ((!proc
->attr
.subroutine
&& !proc
->attr
.function
)
13238 || (proc
->attr
.proc
!= PROC_MODULE
13239 && proc
->attr
.if_source
!= IFSRC_IFBODY
)
13240 || proc
->attr
.abstract
)
13242 gfc_error ("%qs must be a module procedure or an external procedure with"
13243 " an explicit interface at %L", proc
->name
, &where
);
13248 stree
->n
.tb
->subroutine
= proc
->attr
.subroutine
;
13249 stree
->n
.tb
->function
= proc
->attr
.function
;
13251 /* Find the super-type of the current derived type. We could do this once and
13252 store in a global if speed is needed, but as long as not I believe this is
13253 more readable and clearer. */
13254 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13256 /* If PASS, resolve and check arguments if not already resolved / loaded
13257 from a .mod file. */
13258 if (!stree
->n
.tb
->nopass
&& stree
->n
.tb
->pass_arg_num
== 0)
13260 gfc_formal_arglist
*dummy_args
;
13262 dummy_args
= gfc_sym_get_dummy_args (proc
);
13263 if (stree
->n
.tb
->pass_arg
)
13265 gfc_formal_arglist
*i
;
13267 /* If an explicit passing argument name is given, walk the arg-list
13268 and look for it. */
13271 stree
->n
.tb
->pass_arg_num
= 1;
13272 for (i
= dummy_args
; i
; i
= i
->next
)
13274 if (!strcmp (i
->sym
->name
, stree
->n
.tb
->pass_arg
))
13279 ++stree
->n
.tb
->pass_arg_num
;
13284 gfc_error ("Procedure %qs with PASS(%s) at %L has no"
13286 proc
->name
, stree
->n
.tb
->pass_arg
, &where
,
13287 stree
->n
.tb
->pass_arg
);
13293 /* Otherwise, take the first one; there should in fact be at least
13295 stree
->n
.tb
->pass_arg_num
= 1;
13298 gfc_error ("Procedure %qs with PASS at %L must have at"
13299 " least one argument", proc
->name
, &where
);
13302 me_arg
= dummy_args
->sym
;
13305 /* Now check that the argument-type matches and the passed-object
13306 dummy argument is generally fine. */
13308 gcc_assert (me_arg
);
13310 if (me_arg
->ts
.type
!= BT_CLASS
)
13312 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13313 " at %L", proc
->name
, &where
);
13317 if (CLASS_DATA (me_arg
)->ts
.u
.derived
13318 != resolve_bindings_derived
)
13320 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13321 " the derived-type %qs", me_arg
->name
, proc
->name
,
13322 me_arg
->name
, &where
, resolve_bindings_derived
->name
);
13326 gcc_assert (me_arg
->ts
.type
== BT_CLASS
);
13327 if (CLASS_DATA (me_arg
)->as
&& CLASS_DATA (me_arg
)->as
->rank
!= 0)
13329 gfc_error ("Passed-object dummy argument of %qs at %L must be"
13330 " scalar", proc
->name
, &where
);
13333 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13335 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13336 " be ALLOCATABLE", proc
->name
, &where
);
13339 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13341 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13342 " be POINTER", proc
->name
, &where
);
13347 /* If we are extending some type, check that we don't override a procedure
13348 flagged NON_OVERRIDABLE. */
13349 stree
->n
.tb
->overridden
= NULL
;
13352 gfc_symtree
* overridden
;
13353 overridden
= gfc_find_typebound_proc (super_type
, NULL
,
13354 stree
->name
, true, NULL
);
13358 if (overridden
->n
.tb
)
13359 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13361 if (!gfc_check_typebound_override (stree
, overridden
))
13366 /* See if there's a name collision with a component directly in this type. */
13367 for (comp
= resolve_bindings_derived
->components
; comp
; comp
= comp
->next
)
13368 if (!strcmp (comp
->name
, stree
->name
))
13370 gfc_error ("Procedure %qs at %L has the same name as a component of"
13372 stree
->name
, &where
, resolve_bindings_derived
->name
);
13376 /* Try to find a name collision with an inherited component. */
13377 if (super_type
&& gfc_find_component (super_type
, stree
->name
, true, true,
13380 gfc_error ("Procedure %qs at %L has the same name as an inherited"
13381 " component of %qs",
13382 stree
->name
, &where
, resolve_bindings_derived
->name
);
13386 stree
->n
.tb
->error
= 0;
13390 resolve_bindings_result
= false;
13391 stree
->n
.tb
->error
= 1;
13396 resolve_typebound_procedures (gfc_symbol
* derived
)
13399 gfc_symbol
* super_type
;
13401 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->tb_sym_root
)
13404 super_type
= gfc_get_derived_super_type (derived
);
13406 resolve_symbol (super_type
);
13408 resolve_bindings_derived
= derived
;
13409 resolve_bindings_result
= true;
13411 if (derived
->f2k_derived
->tb_sym_root
)
13412 gfc_traverse_symtree (derived
->f2k_derived
->tb_sym_root
,
13413 &resolve_typebound_procedure
);
13415 if (derived
->f2k_derived
->tb_uop_root
)
13416 gfc_traverse_symtree (derived
->f2k_derived
->tb_uop_root
,
13417 &resolve_typebound_user_op
);
13419 for (op
= 0; op
!= GFC_INTRINSIC_OPS
; ++op
)
13421 gfc_typebound_proc
* p
= derived
->f2k_derived
->tb_op
[op
];
13422 if (p
&& !resolve_typebound_intrinsic_op (derived
,
13423 (gfc_intrinsic_op
)op
, p
))
13424 resolve_bindings_result
= false;
13427 return resolve_bindings_result
;
13431 /* Add a derived type to the dt_list. The dt_list is used in trans-types.c
13432 to give all identical derived types the same backend_decl. */
13434 add_dt_to_dt_list (gfc_symbol
*derived
)
13436 gfc_dt_list
*dt_list
;
13438 for (dt_list
= gfc_derived_types
; dt_list
; dt_list
= dt_list
->next
)
13439 if (derived
== dt_list
->derived
)
13442 dt_list
= gfc_get_dt_list ();
13443 dt_list
->next
= gfc_derived_types
;
13444 dt_list
->derived
= derived
;
13445 gfc_derived_types
= dt_list
;
13449 /* Ensure that a derived-type is really not abstract, meaning that every
13450 inherited DEFERRED binding is overridden by a non-DEFERRED one. */
13453 ensure_not_abstract_walker (gfc_symbol
* sub
, gfc_symtree
* st
)
13458 if (!ensure_not_abstract_walker (sub
, st
->left
))
13460 if (!ensure_not_abstract_walker (sub
, st
->right
))
13463 if (st
->n
.tb
&& st
->n
.tb
->deferred
)
13465 gfc_symtree
* overriding
;
13466 overriding
= gfc_find_typebound_proc (sub
, NULL
, st
->name
, true, NULL
);
13469 gcc_assert (overriding
->n
.tb
);
13470 if (overriding
->n
.tb
->deferred
)
13472 gfc_error ("Derived-type %qs declared at %L must be ABSTRACT because"
13473 " %qs is DEFERRED and not overridden",
13474 sub
->name
, &sub
->declared_at
, st
->name
);
13483 ensure_not_abstract (gfc_symbol
* sub
, gfc_symbol
* ancestor
)
13485 /* The algorithm used here is to recursively travel up the ancestry of sub
13486 and for each ancestor-type, check all bindings. If any of them is
13487 DEFERRED, look it up starting from sub and see if the found (overriding)
13488 binding is not DEFERRED.
13489 This is not the most efficient way to do this, but it should be ok and is
13490 clearer than something sophisticated. */
13492 gcc_assert (ancestor
&& !sub
->attr
.abstract
);
13494 if (!ancestor
->attr
.abstract
)
13497 /* Walk bindings of this ancestor. */
13498 if (ancestor
->f2k_derived
)
13501 t
= ensure_not_abstract_walker (sub
, ancestor
->f2k_derived
->tb_sym_root
);
13506 /* Find next ancestor type and recurse on it. */
13507 ancestor
= gfc_get_derived_super_type (ancestor
);
13509 return ensure_not_abstract (sub
, ancestor
);
13515 /* This check for typebound defined assignments is done recursively
13516 since the order in which derived types are resolved is not always in
13517 order of the declarations. */
13520 check_defined_assignments (gfc_symbol
*derived
)
13524 for (c
= derived
->components
; c
; c
= c
->next
)
13526 if (!gfc_bt_struct (c
->ts
.type
)
13528 || c
->attr
.allocatable
13529 || c
->attr
.proc_pointer_comp
13530 || c
->attr
.class_pointer
13531 || c
->attr
.proc_pointer
)
13534 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
13535 || (c
->ts
.u
.derived
->f2k_derived
13536 && c
->ts
.u
.derived
->f2k_derived
->tb_op
[INTRINSIC_ASSIGN
]))
13538 derived
->attr
.defined_assign_comp
= 1;
13542 check_defined_assignments (c
->ts
.u
.derived
);
13543 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
13545 derived
->attr
.defined_assign_comp
= 1;
13552 /* Resolve a single component of a derived type or structure. */
13555 resolve_component (gfc_component
*c
, gfc_symbol
*sym
)
13557 gfc_symbol
*super_type
;
13559 if (c
->attr
.artificial
)
13562 /* Do not allow vtype components to be resolved in nameless namespaces
13563 such as block data because the procedure pointers will cause ICEs
13564 and vtables are not needed in these contexts. */
13565 if (sym
->attr
.vtype
&& sym
->attr
.use_assoc
13566 && sym
->ns
->proc_name
== NULL
)
13570 if ((!sym
->attr
.is_class
|| c
!= sym
->components
)
13571 && c
->attr
.codimension
13572 && (!c
->attr
.allocatable
|| (c
->as
&& c
->as
->type
!= AS_DEFERRED
)))
13574 gfc_error ("Coarray component %qs at %L must be allocatable with "
13575 "deferred shape", c
->name
, &c
->loc
);
13580 if (c
->attr
.codimension
&& c
->ts
.type
== BT_DERIVED
13581 && c
->ts
.u
.derived
->ts
.is_iso_c
)
13583 gfc_error ("Component %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
13584 "shall not be a coarray", c
->name
, &c
->loc
);
13589 if (gfc_bt_struct (c
->ts
.type
) && c
->ts
.u
.derived
->attr
.coarray_comp
13590 && (c
->attr
.codimension
|| c
->attr
.pointer
|| c
->attr
.dimension
13591 || c
->attr
.allocatable
))
13593 gfc_error ("Component %qs at %L with coarray component "
13594 "shall be a nonpointer, nonallocatable scalar",
13600 if (c
->attr
.contiguous
&& (!c
->attr
.dimension
|| !c
->attr
.pointer
))
13602 gfc_error ("Component %qs at %L has the CONTIGUOUS attribute but "
13603 "is not an array pointer", c
->name
, &c
->loc
);
13607 /* F2003, 15.2.1 - length has to be one. */
13608 if (sym
->attr
.is_bind_c
&& c
->ts
.type
== BT_CHARACTER
13609 && (c
->ts
.u
.cl
== NULL
|| c
->ts
.u
.cl
->length
== NULL
13610 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
)
13611 || mpz_cmp_si (c
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
13613 gfc_error ("Component %qs of BIND(C) type at %L must have length one",
13618 if (c
->attr
.proc_pointer
&& c
->ts
.interface
)
13620 gfc_symbol
*ifc
= c
->ts
.interface
;
13622 if (!sym
->attr
.vtype
&& !check_proc_interface (ifc
, &c
->loc
))
13628 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
13630 /* Resolve interface and copy attributes. */
13631 if (ifc
->formal
&& !ifc
->formal_ns
)
13632 resolve_symbol (ifc
);
13633 if (ifc
->attr
.intrinsic
)
13634 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
13638 c
->ts
= ifc
->result
->ts
;
13639 c
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
13640 c
->attr
.pointer
= ifc
->result
->attr
.pointer
;
13641 c
->attr
.dimension
= ifc
->result
->attr
.dimension
;
13642 c
->as
= gfc_copy_array_spec (ifc
->result
->as
);
13643 c
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
13648 c
->attr
.allocatable
= ifc
->attr
.allocatable
;
13649 c
->attr
.pointer
= ifc
->attr
.pointer
;
13650 c
->attr
.dimension
= ifc
->attr
.dimension
;
13651 c
->as
= gfc_copy_array_spec (ifc
->as
);
13652 c
->attr
.class_ok
= ifc
->attr
.class_ok
;
13654 c
->ts
.interface
= ifc
;
13655 c
->attr
.function
= ifc
->attr
.function
;
13656 c
->attr
.subroutine
= ifc
->attr
.subroutine
;
13658 c
->attr
.pure
= ifc
->attr
.pure
;
13659 c
->attr
.elemental
= ifc
->attr
.elemental
;
13660 c
->attr
.recursive
= ifc
->attr
.recursive
;
13661 c
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
13662 c
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
13663 /* Copy char length. */
13664 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
13666 gfc_charlen
*cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
13667 if (cl
->length
&& !cl
->resolved
13668 && !gfc_resolve_expr (cl
->length
))
13677 else if (c
->attr
.proc_pointer
&& c
->ts
.type
== BT_UNKNOWN
)
13679 /* Since PPCs are not implicitly typed, a PPC without an explicit
13680 interface must be a subroutine. */
13681 gfc_add_subroutine (&c
->attr
, c
->name
, &c
->loc
);
13684 /* Procedure pointer components: Check PASS arg. */
13685 if (c
->attr
.proc_pointer
&& !c
->tb
->nopass
&& c
->tb
->pass_arg_num
== 0
13686 && !sym
->attr
.vtype
)
13688 gfc_symbol
* me_arg
;
13690 if (c
->tb
->pass_arg
)
13692 gfc_formal_arglist
* i
;
13694 /* If an explicit passing argument name is given, walk the arg-list
13695 and look for it. */
13698 c
->tb
->pass_arg_num
= 1;
13699 for (i
= c
->ts
.interface
->formal
; i
; i
= i
->next
)
13701 if (!strcmp (i
->sym
->name
, c
->tb
->pass_arg
))
13706 c
->tb
->pass_arg_num
++;
13711 gfc_error ("Procedure pointer component %qs with PASS(%s) "
13712 "at %L has no argument %qs", c
->name
,
13713 c
->tb
->pass_arg
, &c
->loc
, c
->tb
->pass_arg
);
13720 /* Otherwise, take the first one; there should in fact be at least
13722 c
->tb
->pass_arg_num
= 1;
13723 if (!c
->ts
.interface
->formal
)
13725 gfc_error ("Procedure pointer component %qs with PASS at %L "
13726 "must have at least one argument",
13731 me_arg
= c
->ts
.interface
->formal
->sym
;
13734 /* Now check that the argument-type matches. */
13735 gcc_assert (me_arg
);
13736 if ((me_arg
->ts
.type
!= BT_DERIVED
&& me_arg
->ts
.type
!= BT_CLASS
)
13737 || (me_arg
->ts
.type
== BT_DERIVED
&& me_arg
->ts
.u
.derived
!= sym
)
13738 || (me_arg
->ts
.type
== BT_CLASS
13739 && CLASS_DATA (me_arg
)->ts
.u
.derived
!= sym
))
13741 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13742 " the derived type %qs", me_arg
->name
, c
->name
,
13743 me_arg
->name
, &c
->loc
, sym
->name
);
13748 /* Check for F03:C453. */
13749 if (CLASS_DATA (me_arg
)->attr
.dimension
)
13751 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13752 "must be scalar", me_arg
->name
, c
->name
, me_arg
->name
,
13758 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13760 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13761 "may not have the POINTER attribute", me_arg
->name
,
13762 c
->name
, me_arg
->name
, &c
->loc
);
13767 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13769 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13770 "may not be ALLOCATABLE", me_arg
->name
, c
->name
,
13771 me_arg
->name
, &c
->loc
);
13776 if (gfc_type_is_extensible (sym
) && me_arg
->ts
.type
!= BT_CLASS
)
13778 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13779 " at %L", c
->name
, &c
->loc
);
13785 /* Check type-spec if this is not the parent-type component. */
13786 if (((sym
->attr
.is_class
13787 && (!sym
->components
->ts
.u
.derived
->attr
.extension
13788 || c
!= sym
->components
->ts
.u
.derived
->components
))
13789 || (!sym
->attr
.is_class
13790 && (!sym
->attr
.extension
|| c
!= sym
->components
)))
13791 && !sym
->attr
.vtype
13792 && !resolve_typespec_used (&c
->ts
, &c
->loc
, c
->name
))
13795 super_type
= gfc_get_derived_super_type (sym
);
13797 /* If this type is an extension, set the accessibility of the parent
13800 && ((sym
->attr
.is_class
13801 && c
== sym
->components
->ts
.u
.derived
->components
)
13802 || (!sym
->attr
.is_class
&& c
== sym
->components
))
13803 && strcmp (super_type
->name
, c
->name
) == 0)
13804 c
->attr
.access
= super_type
->attr
.access
;
13806 /* If this type is an extension, see if this component has the same name
13807 as an inherited type-bound procedure. */
13808 if (super_type
&& !sym
->attr
.is_class
13809 && gfc_find_typebound_proc (super_type
, NULL
, c
->name
, true, NULL
))
13811 gfc_error ("Component %qs of %qs at %L has the same name as an"
13812 " inherited type-bound procedure",
13813 c
->name
, sym
->name
, &c
->loc
);
13817 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.proc_pointer
13818 && !c
->ts
.deferred
)
13820 if (c
->ts
.u
.cl
->length
== NULL
13821 || (!resolve_charlen(c
->ts
.u
.cl
))
13822 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
))
13824 gfc_error ("Character length of component %qs needs to "
13825 "be a constant specification expression at %L",
13827 c
->ts
.u
.cl
->length
? &c
->ts
.u
.cl
->length
->where
: &c
->loc
);
13832 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.deferred
13833 && !c
->attr
.pointer
&& !c
->attr
.allocatable
)
13835 gfc_error ("Character component %qs of %qs at %L with deferred "
13836 "length must be a POINTER or ALLOCATABLE",
13837 c
->name
, sym
->name
, &c
->loc
);
13841 /* Add the hidden deferred length field. */
13842 if (c
->ts
.type
== BT_CHARACTER
13843 && (c
->ts
.deferred
|| c
->attr
.pdt_string
)
13844 && !c
->attr
.function
13845 && !sym
->attr
.is_class
)
13847 char name
[GFC_MAX_SYMBOL_LEN
+9];
13848 gfc_component
*strlen
;
13849 sprintf (name
, "_%s_length", c
->name
);
13850 strlen
= gfc_find_component (sym
, name
, true, true, NULL
);
13851 if (strlen
== NULL
)
13853 if (!gfc_add_component (sym
, name
, &strlen
))
13855 strlen
->ts
.type
= BT_INTEGER
;
13856 strlen
->ts
.kind
= gfc_charlen_int_kind
;
13857 strlen
->attr
.access
= ACCESS_PRIVATE
;
13858 strlen
->attr
.artificial
= 1;
13862 if (c
->ts
.type
== BT_DERIVED
13863 && sym
->component_access
!= ACCESS_PRIVATE
13864 && gfc_check_symbol_access (sym
)
13865 && !is_sym_host_assoc (c
->ts
.u
.derived
, sym
->ns
)
13866 && !c
->ts
.u
.derived
->attr
.use_assoc
13867 && !gfc_check_symbol_access (c
->ts
.u
.derived
)
13868 && !gfc_notify_std (GFC_STD_F2003
, "the component %qs is a "
13869 "PRIVATE type and cannot be a component of "
13870 "%qs, which is PUBLIC at %L", c
->name
,
13871 sym
->name
, &sym
->declared_at
))
13874 if ((sym
->attr
.sequence
|| sym
->attr
.is_bind_c
) && c
->ts
.type
== BT_CLASS
)
13876 gfc_error ("Polymorphic component %s at %L in SEQUENCE or BIND(C) "
13877 "type %s", c
->name
, &c
->loc
, sym
->name
);
13881 if (sym
->attr
.sequence
)
13883 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.sequence
== 0)
13885 gfc_error ("Component %s of SEQUENCE type declared at %L does "
13886 "not have the SEQUENCE attribute",
13887 c
->ts
.u
.derived
->name
, &sym
->declared_at
);
13892 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.generic
)
13893 c
->ts
.u
.derived
= gfc_find_dt_in_generic (c
->ts
.u
.derived
);
13894 else if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
13895 && CLASS_DATA (c
)->ts
.u
.derived
->attr
.generic
)
13896 CLASS_DATA (c
)->ts
.u
.derived
13897 = gfc_find_dt_in_generic (CLASS_DATA (c
)->ts
.u
.derived
);
13899 if (!sym
->attr
.is_class
&& c
->ts
.type
== BT_DERIVED
&& !sym
->attr
.vtype
13900 && c
->attr
.pointer
&& c
->ts
.u
.derived
->components
== NULL
13901 && !c
->ts
.u
.derived
->attr
.zero_comp
)
13903 gfc_error ("The pointer component %qs of %qs at %L is a type "
13904 "that has not been declared", c
->name
, sym
->name
,
13909 if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
13910 && CLASS_DATA (c
)->attr
.class_pointer
13911 && CLASS_DATA (c
)->ts
.u
.derived
->components
== NULL
13912 && !CLASS_DATA (c
)->ts
.u
.derived
->attr
.zero_comp
13913 && !UNLIMITED_POLY (c
))
13915 gfc_error ("The pointer component %qs of %qs at %L is a type "
13916 "that has not been declared", c
->name
, sym
->name
,
13921 /* If an allocatable component derived type is of the same type as
13922 the enclosing derived type, we need a vtable generating so that
13923 the __deallocate procedure is created. */
13924 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
13925 && c
->ts
.u
.derived
== sym
&& c
->attr
.allocatable
== 1)
13926 gfc_find_vtab (&c
->ts
);
13928 /* Ensure that all the derived type components are put on the
13929 derived type list; even in formal namespaces, where derived type
13930 pointer components might not have been declared. */
13931 if (c
->ts
.type
== BT_DERIVED
13933 && c
->ts
.u
.derived
->components
13935 && sym
!= c
->ts
.u
.derived
)
13936 add_dt_to_dt_list (c
->ts
.u
.derived
);
13938 if (!gfc_resolve_array_spec (c
->as
,
13939 !(c
->attr
.pointer
|| c
->attr
.proc_pointer
13940 || c
->attr
.allocatable
)))
13943 if (c
->initializer
&& !sym
->attr
.vtype
13944 && !c
->attr
.pdt_kind
&& !c
->attr
.pdt_len
13945 && !gfc_check_assign_symbol (sym
, c
, c
->initializer
))
13952 /* Be nice about the locus for a structure expression - show the locus of the
13953 first non-null sub-expression if we can. */
13956 cons_where (gfc_expr
*struct_expr
)
13958 gfc_constructor
*cons
;
13960 gcc_assert (struct_expr
&& struct_expr
->expr_type
== EXPR_STRUCTURE
);
13962 cons
= gfc_constructor_first (struct_expr
->value
.constructor
);
13963 for (; cons
; cons
= gfc_constructor_next (cons
))
13965 if (cons
->expr
&& cons
->expr
->expr_type
!= EXPR_NULL
)
13966 return &cons
->expr
->where
;
13969 return &struct_expr
->where
;
13972 /* Resolve the components of a structure type. Much less work than derived
13976 resolve_fl_struct (gfc_symbol
*sym
)
13979 gfc_expr
*init
= NULL
;
13982 /* Make sure UNIONs do not have overlapping initializers. */
13983 if (sym
->attr
.flavor
== FL_UNION
)
13985 for (c
= sym
->components
; c
; c
= c
->next
)
13987 if (init
&& c
->initializer
)
13989 gfc_error ("Conflicting initializers in union at %L and %L",
13990 cons_where (init
), cons_where (c
->initializer
));
13991 gfc_free_expr (c
->initializer
);
13992 c
->initializer
= NULL
;
13995 init
= c
->initializer
;
14000 for (c
= sym
->components
; c
; c
= c
->next
)
14001 if (!resolve_component (c
, sym
))
14007 if (sym
->components
)
14008 add_dt_to_dt_list (sym
);
14014 /* Resolve the components of a derived type. This does not have to wait until
14015 resolution stage, but can be done as soon as the dt declaration has been
14019 resolve_fl_derived0 (gfc_symbol
*sym
)
14021 gfc_symbol
* super_type
;
14023 gfc_formal_arglist
*f
;
14026 if (sym
->attr
.unlimited_polymorphic
)
14029 super_type
= gfc_get_derived_super_type (sym
);
14032 if (super_type
&& sym
->attr
.coarray_comp
&& !super_type
->attr
.coarray_comp
)
14034 gfc_error ("As extending type %qs at %L has a coarray component, "
14035 "parent type %qs shall also have one", sym
->name
,
14036 &sym
->declared_at
, super_type
->name
);
14040 /* Ensure the extended type gets resolved before we do. */
14041 if (super_type
&& !resolve_fl_derived0 (super_type
))
14044 /* An ABSTRACT type must be extensible. */
14045 if (sym
->attr
.abstract
&& !gfc_type_is_extensible (sym
))
14047 gfc_error ("Non-extensible derived-type %qs at %L must not be ABSTRACT",
14048 sym
->name
, &sym
->declared_at
);
14052 c
= (sym
->attr
.is_class
) ? sym
->components
->ts
.u
.derived
->components
14056 for ( ; c
!= NULL
; c
= c
->next
)
14057 if (!resolve_component (c
, sym
))
14063 /* Now add the caf token field, where needed. */
14064 if (flag_coarray
!= GFC_FCOARRAY_NONE
14065 && !sym
->attr
.is_class
&& !sym
->attr
.vtype
)
14067 for (c
= sym
->components
; c
; c
= c
->next
)
14068 if (!c
->attr
.dimension
&& !c
->attr
.codimension
14069 && (c
->attr
.allocatable
|| c
->attr
.pointer
))
14071 char name
[GFC_MAX_SYMBOL_LEN
+9];
14072 gfc_component
*token
;
14073 sprintf (name
, "_caf_%s", c
->name
);
14074 token
= gfc_find_component (sym
, name
, true, true, NULL
);
14077 if (!gfc_add_component (sym
, name
, &token
))
14079 token
->ts
.type
= BT_VOID
;
14080 token
->ts
.kind
= gfc_default_integer_kind
;
14081 token
->attr
.access
= ACCESS_PRIVATE
;
14082 token
->attr
.artificial
= 1;
14083 token
->attr
.caf_token
= 1;
14088 check_defined_assignments (sym
);
14090 if (!sym
->attr
.defined_assign_comp
&& super_type
)
14091 sym
->attr
.defined_assign_comp
14092 = super_type
->attr
.defined_assign_comp
;
14094 /* If this is a non-ABSTRACT type extending an ABSTRACT one, ensure that
14095 all DEFERRED bindings are overridden. */
14096 if (super_type
&& super_type
->attr
.abstract
&& !sym
->attr
.abstract
14097 && !sym
->attr
.is_class
14098 && !ensure_not_abstract (sym
, super_type
))
14101 /* Check that there is a component for every PDT parameter. */
14102 if (sym
->attr
.pdt_template
)
14104 for (f
= sym
->formal
; f
; f
= f
->next
)
14108 c
= gfc_find_component (sym
, f
->sym
->name
, true, true, NULL
);
14111 gfc_error ("Parameterized type %qs does not have a component "
14112 "corresponding to parameter %qs at %L", sym
->name
,
14113 f
->sym
->name
, &sym
->declared_at
);
14119 /* Add derived type to the derived type list. */
14120 add_dt_to_dt_list (sym
);
14126 /* The following procedure does the full resolution of a derived type,
14127 including resolution of all type-bound procedures (if present). In contrast
14128 to 'resolve_fl_derived0' this can only be done after the module has been
14129 parsed completely. */
14132 resolve_fl_derived (gfc_symbol
*sym
)
14134 gfc_symbol
*gen_dt
= NULL
;
14136 if (sym
->attr
.unlimited_polymorphic
)
14139 if (!sym
->attr
.is_class
)
14140 gfc_find_symbol (sym
->name
, sym
->ns
, 0, &gen_dt
);
14141 if (gen_dt
&& gen_dt
->generic
&& gen_dt
->generic
->next
14142 && (!gen_dt
->generic
->sym
->attr
.use_assoc
14143 || gen_dt
->generic
->sym
->module
!= gen_dt
->generic
->next
->sym
->module
)
14144 && !gfc_notify_std (GFC_STD_F2003
, "Generic name %qs of function "
14145 "%qs at %L being the same name as derived "
14146 "type at %L", sym
->name
,
14147 gen_dt
->generic
->sym
== sym
14148 ? gen_dt
->generic
->next
->sym
->name
14149 : gen_dt
->generic
->sym
->name
,
14150 gen_dt
->generic
->sym
== sym
14151 ? &gen_dt
->generic
->next
->sym
->declared_at
14152 : &gen_dt
->generic
->sym
->declared_at
,
14153 &sym
->declared_at
))
14156 /* Resolve the finalizer procedures. */
14157 if (!gfc_resolve_finalizers (sym
, NULL
))
14160 if (sym
->attr
.is_class
&& sym
->ts
.u
.derived
== NULL
)
14162 /* Fix up incomplete CLASS symbols. */
14163 gfc_component
*data
= gfc_find_component (sym
, "_data", true, true, NULL
);
14164 gfc_component
*vptr
= gfc_find_component (sym
, "_vptr", true, true, NULL
);
14166 /* Nothing more to do for unlimited polymorphic entities. */
14167 if (data
->ts
.u
.derived
->attr
.unlimited_polymorphic
)
14169 else if (vptr
->ts
.u
.derived
== NULL
)
14171 gfc_symbol
*vtab
= gfc_find_derived_vtab (data
->ts
.u
.derived
);
14173 vptr
->ts
.u
.derived
= vtab
->ts
.u
.derived
;
14174 if (!resolve_fl_derived0 (vptr
->ts
.u
.derived
))
14179 if (!resolve_fl_derived0 (sym
))
14182 /* Resolve the type-bound procedures. */
14183 if (!resolve_typebound_procedures (sym
))
14186 /* Generate module vtables subject to their accessibility and their not
14187 being vtables or pdt templates. If this is not done class declarations
14188 in external procedures wind up with their own version and so SELECT TYPE
14189 fails because the vptrs do not have the same address. */
14190 if (gfc_option
.allow_std
& GFC_STD_F2003
14191 && sym
->ns
->proc_name
14192 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14193 && sym
->attr
.access
!= ACCESS_PRIVATE
14194 && !(sym
->attr
.use_assoc
|| sym
->attr
.vtype
|| sym
->attr
.pdt_template
))
14196 gfc_symbol
*vtab
= gfc_find_derived_vtab (sym
);
14197 gfc_set_sym_referenced (vtab
);
14205 resolve_fl_namelist (gfc_symbol
*sym
)
14210 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14212 /* Check again, the check in match only works if NAMELIST comes
14214 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SIZE
)
14216 gfc_error ("Assumed size array %qs in namelist %qs at %L is not "
14217 "allowed", nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14221 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SHAPE
14222 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14223 "with assumed shape in namelist %qs at %L",
14224 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14227 if (is_non_constant_shape_array (nl
->sym
)
14228 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14229 "with nonconstant shape in namelist %qs at %L",
14230 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14233 if (nl
->sym
->ts
.type
== BT_CHARACTER
14234 && (nl
->sym
->ts
.u
.cl
->length
== NULL
14235 || !gfc_is_constant_expr (nl
->sym
->ts
.u
.cl
->length
))
14236 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs with "
14237 "nonconstant character length in "
14238 "namelist %qs at %L", nl
->sym
->name
,
14239 sym
->name
, &sym
->declared_at
))
14244 /* Reject PRIVATE objects in a PUBLIC namelist. */
14245 if (gfc_check_symbol_access (sym
))
14247 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14249 if (!nl
->sym
->attr
.use_assoc
14250 && !is_sym_host_assoc (nl
->sym
, sym
->ns
)
14251 && !gfc_check_symbol_access (nl
->sym
))
14253 gfc_error ("NAMELIST object %qs was declared PRIVATE and "
14254 "cannot be member of PUBLIC namelist %qs at %L",
14255 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14259 if (nl
->sym
->ts
.type
== BT_DERIVED
14260 && (nl
->sym
->ts
.u
.derived
->attr
.alloc_comp
14261 || nl
->sym
->ts
.u
.derived
->attr
.pointer_comp
))
14263 if (!gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs in "
14264 "namelist %qs at %L with ALLOCATABLE "
14265 "or POINTER components", nl
->sym
->name
,
14266 sym
->name
, &sym
->declared_at
))
14271 /* Types with private components that came here by USE-association. */
14272 if (nl
->sym
->ts
.type
== BT_DERIVED
14273 && derived_inaccessible (nl
->sym
->ts
.u
.derived
))
14275 gfc_error ("NAMELIST object %qs has use-associated PRIVATE "
14276 "components and cannot be member of namelist %qs at %L",
14277 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14281 /* Types with private components that are defined in the same module. */
14282 if (nl
->sym
->ts
.type
== BT_DERIVED
14283 && !is_sym_host_assoc (nl
->sym
->ts
.u
.derived
, sym
->ns
)
14284 && nl
->sym
->ts
.u
.derived
->attr
.private_comp
)
14286 gfc_error ("NAMELIST object %qs has PRIVATE components and "
14287 "cannot be a member of PUBLIC namelist %qs at %L",
14288 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14295 /* 14.1.2 A module or internal procedure represent local entities
14296 of the same type as a namelist member and so are not allowed. */
14297 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14299 if (nl
->sym
->ts
.kind
!= 0 && nl
->sym
->attr
.flavor
== FL_VARIABLE
)
14302 if (nl
->sym
->attr
.function
&& nl
->sym
== nl
->sym
->result
)
14303 if ((nl
->sym
== sym
->ns
->proc_name
)
14305 (sym
->ns
->parent
&& nl
->sym
== sym
->ns
->parent
->proc_name
))
14310 gfc_find_symbol (nl
->sym
->name
, sym
->ns
, 1, &nlsym
);
14311 if (nlsym
&& nlsym
->attr
.flavor
== FL_PROCEDURE
)
14313 gfc_error ("PROCEDURE attribute conflicts with NAMELIST "
14314 "attribute in %qs at %L", nlsym
->name
,
14315 &sym
->declared_at
);
14322 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14323 nl
->sym
->attr
.asynchronous
= 1;
14330 resolve_fl_parameter (gfc_symbol
*sym
)
14332 /* A parameter array's shape needs to be constant. */
14333 if (sym
->as
!= NULL
14334 && (sym
->as
->type
== AS_DEFERRED
14335 || is_non_constant_shape_array (sym
)))
14337 gfc_error ("Parameter array %qs at %L cannot be automatic "
14338 "or of deferred shape", sym
->name
, &sym
->declared_at
);
14342 /* Constraints on deferred type parameter. */
14343 if (!deferred_requirements (sym
))
14346 /* Make sure a parameter that has been implicitly typed still
14347 matches the implicit type, since PARAMETER statements can precede
14348 IMPLICIT statements. */
14349 if (sym
->attr
.implicit_type
14350 && !gfc_compare_types (&sym
->ts
, gfc_get_default_type (sym
->name
,
14353 gfc_error ("Implicitly typed PARAMETER %qs at %L doesn't match a "
14354 "later IMPLICIT type", sym
->name
, &sym
->declared_at
);
14358 /* Make sure the types of derived parameters are consistent. This
14359 type checking is deferred until resolution because the type may
14360 refer to a derived type from the host. */
14361 if (sym
->ts
.type
== BT_DERIVED
14362 && !gfc_compare_types (&sym
->ts
, &sym
->value
->ts
))
14364 gfc_error ("Incompatible derived type in PARAMETER at %L",
14365 &sym
->value
->where
);
14369 /* F03:C509,C514. */
14370 if (sym
->ts
.type
== BT_CLASS
)
14372 gfc_error ("CLASS variable %qs at %L cannot have the PARAMETER attribute",
14373 sym
->name
, &sym
->declared_at
);
14381 /* Called by resolve_symbol to check PDTs. */
14384 resolve_pdt (gfc_symbol
* sym
)
14386 gfc_symbol
*derived
= NULL
;
14387 gfc_actual_arglist
*param
;
14389 bool const_len_exprs
= true;
14390 bool assumed_len_exprs
= false;
14391 symbol_attribute
*attr
;
14393 if (sym
->ts
.type
== BT_DERIVED
)
14395 derived
= sym
->ts
.u
.derived
;
14396 attr
= &(sym
->attr
);
14398 else if (sym
->ts
.type
== BT_CLASS
)
14400 derived
= CLASS_DATA (sym
)->ts
.u
.derived
;
14401 attr
= &(CLASS_DATA (sym
)->attr
);
14404 gcc_unreachable ();
14406 gcc_assert (derived
->attr
.pdt_type
);
14408 for (param
= sym
->param_list
; param
; param
= param
->next
)
14410 c
= gfc_find_component (derived
, param
->name
, false, true, NULL
);
14412 if (c
->attr
.pdt_kind
)
14415 if (param
->expr
&& !gfc_is_constant_expr (param
->expr
)
14416 && c
->attr
.pdt_len
)
14417 const_len_exprs
= false;
14418 else if (param
->spec_type
== SPEC_ASSUMED
)
14419 assumed_len_exprs
= true;
14421 if (param
->spec_type
== SPEC_DEFERRED
14422 && !attr
->allocatable
&& !attr
->pointer
)
14423 gfc_error ("The object %qs at %L has a deferred LEN "
14424 "parameter %qs and is neither allocatable "
14425 "nor a pointer", sym
->name
, &sym
->declared_at
,
14430 if (!const_len_exprs
14431 && (sym
->ns
->proc_name
->attr
.is_main_program
14432 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14433 || sym
->attr
.save
!= SAVE_NONE
))
14434 gfc_error ("The AUTOMATIC object %qs at %L must not have the "
14435 "SAVE attribute or be a variable declared in the "
14436 "main program, a module or a submodule(F08/C513)",
14437 sym
->name
, &sym
->declared_at
);
14439 if (assumed_len_exprs
&& !(sym
->attr
.dummy
14440 || sym
->attr
.select_type_temporary
|| sym
->attr
.associate_var
))
14441 gfc_error ("The object %qs at %L with ASSUMED type parameters "
14442 "must be a dummy or a SELECT TYPE selector(F08/4.2)",
14443 sym
->name
, &sym
->declared_at
);
14447 /* Do anything necessary to resolve a symbol. Right now, we just
14448 assume that an otherwise unknown symbol is a variable. This sort
14449 of thing commonly happens for symbols in module. */
14452 resolve_symbol (gfc_symbol
*sym
)
14454 int check_constant
, mp_flag
;
14455 gfc_symtree
*symtree
;
14456 gfc_symtree
*this_symtree
;
14459 symbol_attribute class_attr
;
14460 gfc_array_spec
*as
;
14461 bool saved_specification_expr
;
14467 /* No symbol will ever have union type; only components can be unions.
14468 Union type declaration symbols have type BT_UNKNOWN but flavor FL_UNION
14469 (just like derived type declaration symbols have flavor FL_DERIVED). */
14470 gcc_assert (sym
->ts
.type
!= BT_UNION
);
14472 /* Coarrayed polymorphic objects with allocatable or pointer components are
14473 yet unsupported for -fcoarray=lib. */
14474 if (flag_coarray
== GFC_FCOARRAY_LIB
&& sym
->ts
.type
== BT_CLASS
14475 && sym
->ts
.u
.derived
&& CLASS_DATA (sym
)
14476 && CLASS_DATA (sym
)->attr
.codimension
14477 && (CLASS_DATA (sym
)->ts
.u
.derived
->attr
.alloc_comp
14478 || CLASS_DATA (sym
)->ts
.u
.derived
->attr
.pointer_comp
))
14480 gfc_error ("Sorry, allocatable/pointer components in polymorphic (CLASS) "
14481 "type coarrays at %L are unsupported", &sym
->declared_at
);
14485 if (sym
->attr
.artificial
)
14488 if (sym
->attr
.unlimited_polymorphic
)
14491 if (sym
->attr
.flavor
== FL_UNKNOWN
14492 || (sym
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.intrinsic
14493 && !sym
->attr
.generic
&& !sym
->attr
.external
14494 && sym
->attr
.if_source
== IFSRC_UNKNOWN
14495 && sym
->ts
.type
== BT_UNKNOWN
))
14498 /* If we find that a flavorless symbol is an interface in one of the
14499 parent namespaces, find its symtree in this namespace, free the
14500 symbol and set the symtree to point to the interface symbol. */
14501 for (ns
= gfc_current_ns
->parent
; ns
; ns
= ns
->parent
)
14503 symtree
= gfc_find_symtree (ns
->sym_root
, sym
->name
);
14504 if (symtree
&& (symtree
->n
.sym
->generic
||
14505 (symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
14506 && sym
->ns
->construct_entities
)))
14508 this_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
14510 if (this_symtree
->n
.sym
== sym
)
14512 symtree
->n
.sym
->refs
++;
14513 gfc_release_symbol (sym
);
14514 this_symtree
->n
.sym
= symtree
->n
.sym
;
14520 /* Otherwise give it a flavor according to such attributes as
14522 if (sym
->attr
.flavor
== FL_UNKNOWN
&& sym
->attr
.external
== 0
14523 && sym
->attr
.intrinsic
== 0)
14524 sym
->attr
.flavor
= FL_VARIABLE
;
14525 else if (sym
->attr
.flavor
== FL_UNKNOWN
)
14527 sym
->attr
.flavor
= FL_PROCEDURE
;
14528 if (sym
->attr
.dimension
)
14529 sym
->attr
.function
= 1;
14533 if (sym
->attr
.external
&& sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.function
)
14534 gfc_add_function (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14536 if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
14537 && !resolve_procedure_interface (sym
))
14540 if (sym
->attr
.is_protected
&& !sym
->attr
.proc_pointer
14541 && (sym
->attr
.procedure
|| sym
->attr
.external
))
14543 if (sym
->attr
.external
)
14544 gfc_error ("PROTECTED attribute conflicts with EXTERNAL attribute "
14545 "at %L", &sym
->declared_at
);
14547 gfc_error ("PROCEDURE attribute conflicts with PROTECTED attribute "
14548 "at %L", &sym
->declared_at
);
14553 if (sym
->attr
.flavor
== FL_DERIVED
&& !resolve_fl_derived (sym
))
14556 else if ((sym
->attr
.flavor
== FL_STRUCT
|| sym
->attr
.flavor
== FL_UNION
)
14557 && !resolve_fl_struct (sym
))
14560 /* Symbols that are module procedures with results (functions) have
14561 the types and array specification copied for type checking in
14562 procedures that call them, as well as for saving to a module
14563 file. These symbols can't stand the scrutiny that their results
14565 mp_flag
= (sym
->result
!= NULL
&& sym
->result
!= sym
);
14567 /* Make sure that the intrinsic is consistent with its internal
14568 representation. This needs to be done before assigning a default
14569 type to avoid spurious warnings. */
14570 if (sym
->attr
.flavor
!= FL_MODULE
&& sym
->attr
.intrinsic
14571 && !gfc_resolve_intrinsic (sym
, &sym
->declared_at
))
14574 /* Resolve associate names. */
14576 resolve_assoc_var (sym
, true);
14578 /* Assign default type to symbols that need one and don't have one. */
14579 if (sym
->ts
.type
== BT_UNKNOWN
)
14581 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
)
14583 gfc_set_default_type (sym
, 1, NULL
);
14586 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.external
14587 && !sym
->attr
.function
&& !sym
->attr
.subroutine
14588 && gfc_get_default_type (sym
->name
, sym
->ns
)->type
== BT_UNKNOWN
)
14589 gfc_add_subroutine (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14591 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14593 /* The specific case of an external procedure should emit an error
14594 in the case that there is no implicit type. */
14597 if (!sym
->attr
.mixed_entry_master
)
14598 gfc_set_default_type (sym
, sym
->attr
.external
, NULL
);
14602 /* Result may be in another namespace. */
14603 resolve_symbol (sym
->result
);
14605 if (!sym
->result
->attr
.proc_pointer
)
14607 sym
->ts
= sym
->result
->ts
;
14608 sym
->as
= gfc_copy_array_spec (sym
->result
->as
);
14609 sym
->attr
.dimension
= sym
->result
->attr
.dimension
;
14610 sym
->attr
.pointer
= sym
->result
->attr
.pointer
;
14611 sym
->attr
.allocatable
= sym
->result
->attr
.allocatable
;
14612 sym
->attr
.contiguous
= sym
->result
->attr
.contiguous
;
14617 else if (mp_flag
&& sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14619 bool saved_specification_expr
= specification_expr
;
14620 specification_expr
= true;
14621 gfc_resolve_array_spec (sym
->result
->as
, false);
14622 specification_expr
= saved_specification_expr
;
14625 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
14627 as
= CLASS_DATA (sym
)->as
;
14628 class_attr
= CLASS_DATA (sym
)->attr
;
14629 class_attr
.pointer
= class_attr
.class_pointer
;
14633 class_attr
= sym
->attr
;
14638 if (sym
->attr
.contiguous
14639 && (!class_attr
.dimension
14640 || (as
->type
!= AS_ASSUMED_SHAPE
&& as
->type
!= AS_ASSUMED_RANK
14641 && !class_attr
.pointer
)))
14643 gfc_error ("%qs at %L has the CONTIGUOUS attribute but is not an "
14644 "array pointer or an assumed-shape or assumed-rank array",
14645 sym
->name
, &sym
->declared_at
);
14649 /* Assumed size arrays and assumed shape arrays must be dummy
14650 arguments. Array-spec's of implied-shape should have been resolved to
14651 AS_EXPLICIT already. */
14655 /* If AS_IMPLIED_SHAPE makes it to here, it must be a bad
14656 specification expression. */
14657 if (as
->type
== AS_IMPLIED_SHAPE
)
14660 for (i
=0; i
<as
->rank
; i
++)
14662 if (as
->lower
[i
] != NULL
&& as
->upper
[i
] == NULL
)
14664 gfc_error ("Bad specification for assumed size array at %L",
14665 &as
->lower
[i
]->where
);
14672 if (((as
->type
== AS_ASSUMED_SIZE
&& !as
->cp_was_assumed
)
14673 || as
->type
== AS_ASSUMED_SHAPE
)
14674 && !sym
->attr
.dummy
&& !sym
->attr
.select_type_temporary
)
14676 if (as
->type
== AS_ASSUMED_SIZE
)
14677 gfc_error ("Assumed size array at %L must be a dummy argument",
14678 &sym
->declared_at
);
14680 gfc_error ("Assumed shape array at %L must be a dummy argument",
14681 &sym
->declared_at
);
14684 /* TS 29113, C535a. */
14685 if (as
->type
== AS_ASSUMED_RANK
&& !sym
->attr
.dummy
14686 && !sym
->attr
.select_type_temporary
)
14688 gfc_error ("Assumed-rank array at %L must be a dummy argument",
14689 &sym
->declared_at
);
14692 if (as
->type
== AS_ASSUMED_RANK
14693 && (sym
->attr
.codimension
|| sym
->attr
.value
))
14695 gfc_error ("Assumed-rank array at %L may not have the VALUE or "
14696 "CODIMENSION attribute", &sym
->declared_at
);
14701 /* Make sure symbols with known intent or optional are really dummy
14702 variable. Because of ENTRY statement, this has to be deferred
14703 until resolution time. */
14705 if (!sym
->attr
.dummy
14706 && (sym
->attr
.optional
|| sym
->attr
.intent
!= INTENT_UNKNOWN
))
14708 gfc_error ("Symbol at %L is not a DUMMY variable", &sym
->declared_at
);
14712 if (sym
->attr
.value
&& !sym
->attr
.dummy
)
14714 gfc_error ("%qs at %L cannot have the VALUE attribute because "
14715 "it is not a dummy argument", sym
->name
, &sym
->declared_at
);
14719 if (sym
->attr
.value
&& sym
->ts
.type
== BT_CHARACTER
)
14721 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
14722 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
14724 gfc_error ("Character dummy variable %qs at %L with VALUE "
14725 "attribute must have constant length",
14726 sym
->name
, &sym
->declared_at
);
14730 if (sym
->ts
.is_c_interop
14731 && mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
14733 gfc_error ("C interoperable character dummy variable %qs at %L "
14734 "with VALUE attribute must have length one",
14735 sym
->name
, &sym
->declared_at
);
14740 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
14741 && sym
->ts
.u
.derived
->attr
.generic
)
14743 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
14744 if (!sym
->ts
.u
.derived
)
14746 gfc_error ("The derived type %qs at %L is of type %qs, "
14747 "which has not been defined", sym
->name
,
14748 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
14749 sym
->ts
.type
= BT_UNKNOWN
;
14754 /* Use the same constraints as TYPE(*), except for the type check
14755 and that only scalars and assumed-size arrays are permitted. */
14756 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
14758 if (!sym
->attr
.dummy
)
14760 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14761 "a dummy argument", sym
->name
, &sym
->declared_at
);
14765 if (sym
->ts
.type
!= BT_ASSUMED
&& sym
->ts
.type
!= BT_INTEGER
14766 && sym
->ts
.type
!= BT_REAL
&& sym
->ts
.type
!= BT_LOGICAL
14767 && sym
->ts
.type
!= BT_COMPLEX
)
14769 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14770 "of type TYPE(*) or of an numeric intrinsic type",
14771 sym
->name
, &sym
->declared_at
);
14775 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
14776 || sym
->attr
.pointer
|| sym
->attr
.value
)
14778 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
14779 "have the ALLOCATABLE, CODIMENSION, POINTER or VALUE "
14780 "attribute", sym
->name
, &sym
->declared_at
);
14784 if (sym
->attr
.intent
== INTENT_OUT
)
14786 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
14787 "have the INTENT(OUT) attribute",
14788 sym
->name
, &sym
->declared_at
);
14791 if (sym
->attr
.dimension
&& sym
->as
->type
!= AS_ASSUMED_SIZE
)
14793 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall "
14794 "either be a scalar or an assumed-size array",
14795 sym
->name
, &sym
->declared_at
);
14799 /* Set the type to TYPE(*) and add a dimension(*) to ensure
14800 NO_ARG_CHECK is correctly handled in trans*.c, e.g. with
14802 sym
->ts
.type
= BT_ASSUMED
;
14803 sym
->as
= gfc_get_array_spec ();
14804 sym
->as
->type
= AS_ASSUMED_SIZE
;
14806 sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
14808 else if (sym
->ts
.type
== BT_ASSUMED
)
14810 /* TS 29113, C407a. */
14811 if (!sym
->attr
.dummy
)
14813 gfc_error ("Assumed type of variable %s at %L is only permitted "
14814 "for dummy variables", sym
->name
, &sym
->declared_at
);
14817 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
14818 || sym
->attr
.pointer
|| sym
->attr
.value
)
14820 gfc_error ("Assumed-type variable %s at %L may not have the "
14821 "ALLOCATABLE, CODIMENSION, POINTER or VALUE attribute",
14822 sym
->name
, &sym
->declared_at
);
14825 if (sym
->attr
.intent
== INTENT_OUT
)
14827 gfc_error ("Assumed-type variable %s at %L may not have the "
14828 "INTENT(OUT) attribute",
14829 sym
->name
, &sym
->declared_at
);
14832 if (sym
->attr
.dimension
&& sym
->as
->type
== AS_EXPLICIT
)
14834 gfc_error ("Assumed-type variable %s at %L shall not be an "
14835 "explicit-shape array", sym
->name
, &sym
->declared_at
);
14840 /* If the symbol is marked as bind(c), that it is declared at module level
14841 scope and verify its type and kind. Do not do the latter for symbols
14842 that are implicitly typed because that is handled in
14843 gfc_set_default_type. Handle dummy arguments and procedure definitions
14844 separately. Also, anything that is use associated is not handled here
14845 but instead is handled in the module it is declared in. Finally, derived
14846 type definitions are allowed to be BIND(C) since that only implies that
14847 they're interoperable, and they are checked fully for interoperability
14848 when a variable is declared of that type. */
14849 if (sym
->attr
.is_bind_c
&& sym
->attr
.use_assoc
== 0
14850 && sym
->attr
.dummy
== 0 && sym
->attr
.flavor
!= FL_PROCEDURE
14851 && sym
->attr
.flavor
!= FL_DERIVED
)
14855 /* First, make sure the variable is declared at the
14856 module-level scope (J3/04-007, Section 15.3). */
14857 if (sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
&&
14858 sym
->attr
.in_common
== 0)
14860 gfc_error ("Variable %qs at %L cannot be BIND(C) because it "
14861 "is neither a COMMON block nor declared at the "
14862 "module level scope", sym
->name
, &(sym
->declared_at
));
14865 else if (sym
->ts
.type
== BT_CHARACTER
14866 && (sym
->ts
.u
.cl
== NULL
|| sym
->ts
.u
.cl
->length
== NULL
14867 || !gfc_is_constant_expr (sym
->ts
.u
.cl
->length
)
14868 || mpz_cmp_si (sym
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
14870 gfc_error ("BIND(C) Variable %qs at %L must have length one",
14871 sym
->name
, &sym
->declared_at
);
14874 else if (sym
->common_head
!= NULL
&& sym
->attr
.implicit_type
== 0)
14876 t
= verify_com_block_vars_c_interop (sym
->common_head
);
14878 else if (sym
->attr
.implicit_type
== 0)
14880 /* If type() declaration, we need to verify that the components
14881 of the given type are all C interoperable, etc. */
14882 if (sym
->ts
.type
== BT_DERIVED
&&
14883 sym
->ts
.u
.derived
->attr
.is_c_interop
!= 1)
14885 /* Make sure the user marked the derived type as BIND(C). If
14886 not, call the verify routine. This could print an error
14887 for the derived type more than once if multiple variables
14888 of that type are declared. */
14889 if (sym
->ts
.u
.derived
->attr
.is_bind_c
!= 1)
14890 verify_bind_c_derived_type (sym
->ts
.u
.derived
);
14894 /* Verify the variable itself as C interoperable if it
14895 is BIND(C). It is not possible for this to succeed if
14896 the verify_bind_c_derived_type failed, so don't have to handle
14897 any error returned by verify_bind_c_derived_type. */
14898 t
= verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
14899 sym
->common_block
);
14904 /* clear the is_bind_c flag to prevent reporting errors more than
14905 once if something failed. */
14906 sym
->attr
.is_bind_c
= 0;
14911 /* If a derived type symbol has reached this point, without its
14912 type being declared, we have an error. Notice that most
14913 conditions that produce undefined derived types have already
14914 been dealt with. However, the likes of:
14915 implicit type(t) (t) ..... call foo (t) will get us here if
14916 the type is not declared in the scope of the implicit
14917 statement. Change the type to BT_UNKNOWN, both because it is so
14918 and to prevent an ICE. */
14919 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
14920 && sym
->ts
.u
.derived
->components
== NULL
14921 && !sym
->ts
.u
.derived
->attr
.zero_comp
)
14923 gfc_error ("The derived type %qs at %L is of type %qs, "
14924 "which has not been defined", sym
->name
,
14925 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
14926 sym
->ts
.type
= BT_UNKNOWN
;
14930 /* Make sure that the derived type has been resolved and that the
14931 derived type is visible in the symbol's namespace, if it is a
14932 module function and is not PRIVATE. */
14933 if (sym
->ts
.type
== BT_DERIVED
14934 && sym
->ts
.u
.derived
->attr
.use_assoc
14935 && sym
->ns
->proc_name
14936 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14937 && !resolve_fl_derived (sym
->ts
.u
.derived
))
14940 /* Unless the derived-type declaration is use associated, Fortran 95
14941 does not allow public entries of private derived types.
14942 See 4.4.1 (F95) and 4.5.1.1 (F2003); and related interpretation
14943 161 in 95-006r3. */
14944 if (sym
->ts
.type
== BT_DERIVED
14945 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14946 && !sym
->ts
.u
.derived
->attr
.use_assoc
14947 && gfc_check_symbol_access (sym
)
14948 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
14949 && !gfc_notify_std (GFC_STD_F2003
, "PUBLIC %s %qs at %L of PRIVATE "
14950 "derived type %qs",
14951 (sym
->attr
.flavor
== FL_PARAMETER
)
14952 ? "parameter" : "variable",
14953 sym
->name
, &sym
->declared_at
,
14954 sym
->ts
.u
.derived
->name
))
14957 /* F2008, C1302. */
14958 if (sym
->ts
.type
== BT_DERIVED
14959 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
14960 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
14961 || sym
->ts
.u
.derived
->attr
.lock_comp
)
14962 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
14964 gfc_error ("Variable %s at %L of type LOCK_TYPE or with subcomponent of "
14965 "type LOCK_TYPE must be a coarray", sym
->name
,
14966 &sym
->declared_at
);
14970 /* TS18508, C702/C703. */
14971 if (sym
->ts
.type
== BT_DERIVED
14972 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
14973 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
14974 || sym
->ts
.u
.derived
->attr
.event_comp
)
14975 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
14977 gfc_error ("Variable %s at %L of type EVENT_TYPE or with subcomponent of "
14978 "type EVENT_TYPE must be a coarray", sym
->name
,
14979 &sym
->declared_at
);
14983 /* An assumed-size array with INTENT(OUT) shall not be of a type for which
14984 default initialization is defined (5.1.2.4.4). */
14985 if (sym
->ts
.type
== BT_DERIVED
14987 && sym
->attr
.intent
== INTENT_OUT
14989 && sym
->as
->type
== AS_ASSUMED_SIZE
)
14991 for (c
= sym
->ts
.u
.derived
->components
; c
; c
= c
->next
)
14993 if (c
->initializer
)
14995 gfc_error ("The INTENT(OUT) dummy argument %qs at %L is "
14996 "ASSUMED SIZE and so cannot have a default initializer",
14997 sym
->name
, &sym
->declared_at
);
15004 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15005 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.lock_comp
)
15007 gfc_error ("Dummy argument %qs at %L of LOCK_TYPE shall not be "
15008 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15013 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15014 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.event_comp
)
15016 gfc_error ("Dummy argument %qs at %L of EVENT_TYPE shall not be "
15017 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15022 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15023 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15024 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15025 || class_attr
.codimension
)
15026 && (sym
->attr
.result
|| sym
->result
== sym
))
15028 gfc_error ("Function result %qs at %L shall not be a coarray or have "
15029 "a coarray component", sym
->name
, &sym
->declared_at
);
15034 if (sym
->attr
.codimension
&& sym
->ts
.type
== BT_DERIVED
15035 && sym
->ts
.u
.derived
->ts
.is_iso_c
)
15037 gfc_error ("Variable %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
15038 "shall not be a coarray", sym
->name
, &sym
->declared_at
);
15043 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15044 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15045 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15046 && (class_attr
.codimension
|| class_attr
.pointer
|| class_attr
.dimension
15047 || class_attr
.allocatable
))
15049 gfc_error ("Variable %qs at %L with coarray component shall be a "
15050 "nonpointer, nonallocatable scalar, which is not a coarray",
15051 sym
->name
, &sym
->declared_at
);
15055 /* F2008, C526. The function-result case was handled above. */
15056 if (class_attr
.codimension
15057 && !(class_attr
.allocatable
|| sym
->attr
.dummy
|| sym
->attr
.save
15058 || sym
->attr
.select_type_temporary
15059 || sym
->attr
.associate_var
15060 || (sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15061 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15062 || sym
->ns
->proc_name
->attr
.is_main_program
15063 || sym
->attr
.function
|| sym
->attr
.result
|| sym
->attr
.use_assoc
))
15065 gfc_error ("Variable %qs at %L is a coarray and is not ALLOCATABLE, SAVE "
15066 "nor a dummy argument", sym
->name
, &sym
->declared_at
);
15070 else if (class_attr
.codimension
&& !sym
->attr
.select_type_temporary
15071 && !class_attr
.allocatable
&& as
&& as
->cotype
== AS_DEFERRED
)
15073 gfc_error ("Coarray variable %qs at %L shall not have codimensions with "
15074 "deferred shape", sym
->name
, &sym
->declared_at
);
15077 else if (class_attr
.codimension
&& class_attr
.allocatable
&& as
15078 && (as
->cotype
!= AS_DEFERRED
|| as
->type
!= AS_DEFERRED
))
15080 gfc_error ("Allocatable coarray variable %qs at %L must have "
15081 "deferred shape", sym
->name
, &sym
->declared_at
);
15086 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15087 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15088 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15089 || (class_attr
.codimension
&& class_attr
.allocatable
))
15090 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
)
15092 gfc_error ("Variable %qs at %L is INTENT(OUT) and can thus not be an "
15093 "allocatable coarray or have coarray components",
15094 sym
->name
, &sym
->declared_at
);
15098 if (class_attr
.codimension
&& sym
->attr
.dummy
15099 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.is_bind_c
)
15101 gfc_error ("Coarray dummy variable %qs at %L not allowed in BIND(C) "
15102 "procedure %qs", sym
->name
, &sym
->declared_at
,
15103 sym
->ns
->proc_name
->name
);
15107 if (sym
->ts
.type
== BT_LOGICAL
15108 && ((sym
->attr
.function
&& sym
->attr
.is_bind_c
&& sym
->result
== sym
)
15109 || ((sym
->attr
.dummy
|| sym
->attr
.result
) && sym
->ns
->proc_name
15110 && sym
->ns
->proc_name
->attr
.is_bind_c
)))
15113 for (i
= 0; gfc_logical_kinds
[i
].kind
; i
++)
15114 if (gfc_logical_kinds
[i
].kind
== sym
->ts
.kind
)
15116 if (!gfc_logical_kinds
[i
].c_bool
&& sym
->attr
.dummy
15117 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL dummy argument %qs at "
15118 "%L with non-C_Bool kind in BIND(C) procedure "
15119 "%qs", sym
->name
, &sym
->declared_at
,
15120 sym
->ns
->proc_name
->name
))
15122 else if (!gfc_logical_kinds
[i
].c_bool
15123 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL result variable "
15124 "%qs at %L with non-C_Bool kind in "
15125 "BIND(C) procedure %qs", sym
->name
,
15127 sym
->attr
.function
? sym
->name
15128 : sym
->ns
->proc_name
->name
))
15132 switch (sym
->attr
.flavor
)
15135 if (!resolve_fl_variable (sym
, mp_flag
))
15140 if (sym
->formal
&& !sym
->formal_ns
)
15142 /* Check that none of the arguments are a namelist. */
15143 gfc_formal_arglist
*formal
= sym
->formal
;
15145 for (; formal
; formal
= formal
->next
)
15146 if (formal
->sym
&& formal
->sym
->attr
.flavor
== FL_NAMELIST
)
15148 gfc_error ("Namelist %qs can not be an argument to "
15149 "subroutine or function at %L",
15150 formal
->sym
->name
, &sym
->declared_at
);
15155 if (!resolve_fl_procedure (sym
, mp_flag
))
15160 if (!resolve_fl_namelist (sym
))
15165 if (!resolve_fl_parameter (sym
))
15173 /* Resolve array specifier. Check as well some constraints
15174 on COMMON blocks. */
15176 check_constant
= sym
->attr
.in_common
&& !sym
->attr
.pointer
;
15178 /* Set the formal_arg_flag so that check_conflict will not throw
15179 an error for host associated variables in the specification
15180 expression for an array_valued function. */
15181 if (sym
->attr
.function
&& sym
->as
)
15182 formal_arg_flag
= true;
15184 saved_specification_expr
= specification_expr
;
15185 specification_expr
= true;
15186 gfc_resolve_array_spec (sym
->as
, check_constant
);
15187 specification_expr
= saved_specification_expr
;
15189 formal_arg_flag
= false;
15191 /* Resolve formal namespaces. */
15192 if (sym
->formal_ns
&& sym
->formal_ns
!= gfc_current_ns
15193 && !sym
->attr
.contained
&& !sym
->attr
.intrinsic
)
15194 gfc_resolve (sym
->formal_ns
);
15196 /* Make sure the formal namespace is present. */
15197 if (sym
->formal
&& !sym
->formal_ns
)
15199 gfc_formal_arglist
*formal
= sym
->formal
;
15200 while (formal
&& !formal
->sym
)
15201 formal
= formal
->next
;
15205 sym
->formal_ns
= formal
->sym
->ns
;
15206 if (sym
->ns
!= formal
->sym
->ns
)
15207 sym
->formal_ns
->refs
++;
15211 /* Check threadprivate restrictions. */
15212 if (sym
->attr
.threadprivate
&& !sym
->attr
.save
15213 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15214 && (!sym
->attr
.in_common
15215 && sym
->module
== NULL
15216 && (sym
->ns
->proc_name
== NULL
15217 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15218 gfc_error ("Threadprivate at %L isn't SAVEd", &sym
->declared_at
);
15220 /* Check omp declare target restrictions. */
15221 if (sym
->attr
.omp_declare_target
15222 && sym
->attr
.flavor
== FL_VARIABLE
15224 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15225 && (!sym
->attr
.in_common
15226 && sym
->module
== NULL
15227 && (sym
->ns
->proc_name
== NULL
15228 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15229 gfc_error ("!$OMP DECLARE TARGET variable %qs at %L isn't SAVEd",
15230 sym
->name
, &sym
->declared_at
);
15232 /* If we have come this far we can apply default-initializers, as
15233 described in 14.7.5, to those variables that have not already
15234 been assigned one. */
15235 if (sym
->ts
.type
== BT_DERIVED
15237 && !sym
->attr
.allocatable
15238 && !sym
->attr
.alloc_comp
)
15240 symbol_attribute
*a
= &sym
->attr
;
15242 if ((!a
->save
&& !a
->dummy
&& !a
->pointer
15243 && !a
->in_common
&& !a
->use_assoc
15245 && !((a
->function
|| a
->result
)
15247 || sym
->ts
.u
.derived
->attr
.alloc_comp
15248 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15249 && !(a
->function
&& sym
!= sym
->result
))
15250 || (a
->dummy
&& a
->intent
== INTENT_OUT
&& !a
->pointer
))
15251 apply_default_init (sym
);
15252 else if (a
->function
&& sym
->result
&& a
->access
!= ACCESS_PRIVATE
15253 && (sym
->ts
.u
.derived
->attr
.alloc_comp
15254 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15255 /* Mark the result symbol to be referenced, when it has allocatable
15257 sym
->result
->attr
.referenced
= 1;
15260 if (sym
->ts
.type
== BT_CLASS
&& sym
->ns
== gfc_current_ns
15261 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
15262 && !CLASS_DATA (sym
)->attr
.class_pointer
15263 && !CLASS_DATA (sym
)->attr
.allocatable
)
15264 apply_default_init (sym
);
15266 /* If this symbol has a type-spec, check it. */
15267 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
15268 || (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
))
15269 if (!resolve_typespec_used (&sym
->ts
, &sym
->declared_at
, sym
->name
))
15272 if (sym
->param_list
)
15277 /************* Resolve DATA statements *************/
15281 gfc_data_value
*vnode
;
15287 /* Advance the values structure to point to the next value in the data list. */
15290 next_data_value (void)
15292 while (mpz_cmp_ui (values
.left
, 0) == 0)
15295 if (values
.vnode
->next
== NULL
)
15298 values
.vnode
= values
.vnode
->next
;
15299 mpz_set (values
.left
, values
.vnode
->repeat
);
15307 check_data_variable (gfc_data_variable
*var
, locus
*where
)
15313 ar_type mark
= AR_UNKNOWN
;
15315 mpz_t section_index
[GFC_MAX_DIMENSIONS
];
15321 if (!gfc_resolve_expr (var
->expr
))
15325 mpz_init_set_si (offset
, 0);
15328 if (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
15329 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
15330 e
= e
->value
.function
.actual
->expr
;
15332 if (e
->expr_type
!= EXPR_VARIABLE
)
15333 gfc_internal_error ("check_data_variable(): Bad expression");
15335 sym
= e
->symtree
->n
.sym
;
15337 if (sym
->ns
->is_block_data
&& !sym
->attr
.in_common
)
15339 gfc_error ("BLOCK DATA element %qs at %L must be in COMMON",
15340 sym
->name
, &sym
->declared_at
);
15343 if (e
->ref
== NULL
&& sym
->as
)
15345 gfc_error ("DATA array %qs at %L must be specified in a previous"
15346 " declaration", sym
->name
, where
);
15350 has_pointer
= sym
->attr
.pointer
;
15352 if (gfc_is_coindexed (e
))
15354 gfc_error ("DATA element %qs at %L cannot have a coindex", sym
->name
,
15359 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15361 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.pointer
)
15365 && ref
->type
== REF_ARRAY
15366 && ref
->u
.ar
.type
!= AR_FULL
)
15368 gfc_error ("DATA element %qs at %L is a pointer and so must "
15369 "be a full array", sym
->name
, where
);
15374 if (e
->rank
== 0 || has_pointer
)
15376 mpz_init_set_ui (size
, 1);
15383 /* Find the array section reference. */
15384 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15386 if (ref
->type
!= REF_ARRAY
)
15388 if (ref
->u
.ar
.type
== AR_ELEMENT
)
15394 /* Set marks according to the reference pattern. */
15395 switch (ref
->u
.ar
.type
)
15403 /* Get the start position of array section. */
15404 gfc_get_section_index (ar
, section_index
, &offset
);
15409 gcc_unreachable ();
15412 if (!gfc_array_size (e
, &size
))
15414 gfc_error ("Nonconstant array section at %L in DATA statement",
15416 mpz_clear (offset
);
15423 while (mpz_cmp_ui (size
, 0) > 0)
15425 if (!next_data_value ())
15427 gfc_error ("DATA statement at %L has more variables than values",
15433 t
= gfc_check_assign (var
->expr
, values
.vnode
->expr
, 0);
15437 /* If we have more than one element left in the repeat count,
15438 and we have more than one element left in the target variable,
15439 then create a range assignment. */
15440 /* FIXME: Only done for full arrays for now, since array sections
15442 if (mark
== AR_FULL
&& ref
&& ref
->next
== NULL
15443 && mpz_cmp_ui (values
.left
, 1) > 0 && mpz_cmp_ui (size
, 1) > 0)
15447 if (mpz_cmp (size
, values
.left
) >= 0)
15449 mpz_init_set (range
, values
.left
);
15450 mpz_sub (size
, size
, values
.left
);
15451 mpz_set_ui (values
.left
, 0);
15455 mpz_init_set (range
, size
);
15456 mpz_sub (values
.left
, values
.left
, size
);
15457 mpz_set_ui (size
, 0);
15460 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15463 mpz_add (offset
, offset
, range
);
15470 /* Assign initial value to symbol. */
15473 mpz_sub_ui (values
.left
, values
.left
, 1);
15474 mpz_sub_ui (size
, size
, 1);
15476 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15481 if (mark
== AR_FULL
)
15482 mpz_add_ui (offset
, offset
, 1);
15484 /* Modify the array section indexes and recalculate the offset
15485 for next element. */
15486 else if (mark
== AR_SECTION
)
15487 gfc_advance_section (section_index
, ar
, &offset
);
15491 if (mark
== AR_SECTION
)
15493 for (i
= 0; i
< ar
->dimen
; i
++)
15494 mpz_clear (section_index
[i
]);
15498 mpz_clear (offset
);
15504 static bool traverse_data_var (gfc_data_variable
*, locus
*);
15506 /* Iterate over a list of elements in a DATA statement. */
15509 traverse_data_list (gfc_data_variable
*var
, locus
*where
)
15512 iterator_stack frame
;
15513 gfc_expr
*e
, *start
, *end
, *step
;
15514 bool retval
= true;
15516 mpz_init (frame
.value
);
15519 start
= gfc_copy_expr (var
->iter
.start
);
15520 end
= gfc_copy_expr (var
->iter
.end
);
15521 step
= gfc_copy_expr (var
->iter
.step
);
15523 if (!gfc_simplify_expr (start
, 1)
15524 || start
->expr_type
!= EXPR_CONSTANT
)
15526 gfc_error ("start of implied-do loop at %L could not be "
15527 "simplified to a constant value", &start
->where
);
15531 if (!gfc_simplify_expr (end
, 1)
15532 || end
->expr_type
!= EXPR_CONSTANT
)
15534 gfc_error ("end of implied-do loop at %L could not be "
15535 "simplified to a constant value", &start
->where
);
15539 if (!gfc_simplify_expr (step
, 1)
15540 || step
->expr_type
!= EXPR_CONSTANT
)
15542 gfc_error ("step of implied-do loop at %L could not be "
15543 "simplified to a constant value", &start
->where
);
15548 mpz_set (trip
, end
->value
.integer
);
15549 mpz_sub (trip
, trip
, start
->value
.integer
);
15550 mpz_add (trip
, trip
, step
->value
.integer
);
15552 mpz_div (trip
, trip
, step
->value
.integer
);
15554 mpz_set (frame
.value
, start
->value
.integer
);
15556 frame
.prev
= iter_stack
;
15557 frame
.variable
= var
->iter
.var
->symtree
;
15558 iter_stack
= &frame
;
15560 while (mpz_cmp_ui (trip
, 0) > 0)
15562 if (!traverse_data_var (var
->list
, where
))
15568 e
= gfc_copy_expr (var
->expr
);
15569 if (!gfc_simplify_expr (e
, 1))
15576 mpz_add (frame
.value
, frame
.value
, step
->value
.integer
);
15578 mpz_sub_ui (trip
, trip
, 1);
15582 mpz_clear (frame
.value
);
15585 gfc_free_expr (start
);
15586 gfc_free_expr (end
);
15587 gfc_free_expr (step
);
15589 iter_stack
= frame
.prev
;
15594 /* Type resolve variables in the variable list of a DATA statement. */
15597 traverse_data_var (gfc_data_variable
*var
, locus
*where
)
15601 for (; var
; var
= var
->next
)
15603 if (var
->expr
== NULL
)
15604 t
= traverse_data_list (var
, where
);
15606 t
= check_data_variable (var
, where
);
15616 /* Resolve the expressions and iterators associated with a data statement.
15617 This is separate from the assignment checking because data lists should
15618 only be resolved once. */
15621 resolve_data_variables (gfc_data_variable
*d
)
15623 for (; d
; d
= d
->next
)
15625 if (d
->list
== NULL
)
15627 if (!gfc_resolve_expr (d
->expr
))
15632 if (!gfc_resolve_iterator (&d
->iter
, false, true))
15635 if (!resolve_data_variables (d
->list
))
15644 /* Resolve a single DATA statement. We implement this by storing a pointer to
15645 the value list into static variables, and then recursively traversing the
15646 variables list, expanding iterators and such. */
15649 resolve_data (gfc_data
*d
)
15652 if (!resolve_data_variables (d
->var
))
15655 values
.vnode
= d
->value
;
15656 if (d
->value
== NULL
)
15657 mpz_set_ui (values
.left
, 0);
15659 mpz_set (values
.left
, d
->value
->repeat
);
15661 if (!traverse_data_var (d
->var
, &d
->where
))
15664 /* At this point, we better not have any values left. */
15666 if (next_data_value ())
15667 gfc_error ("DATA statement at %L has more values than variables",
15672 /* 12.6 Constraint: In a pure subprogram any variable which is in common or
15673 accessed by host or use association, is a dummy argument to a pure function,
15674 is a dummy argument with INTENT (IN) to a pure subroutine, or an object that
15675 is storage associated with any such variable, shall not be used in the
15676 following contexts: (clients of this function). */
15678 /* Determines if a variable is not 'pure', i.e., not assignable within a pure
15679 procedure. Returns zero if assignment is OK, nonzero if there is a
15682 gfc_impure_variable (gfc_symbol
*sym
)
15687 if (sym
->attr
.use_assoc
|| sym
->attr
.in_common
)
15690 /* Check if the symbol's ns is inside the pure procedure. */
15691 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15695 if (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.function
)
15699 proc
= sym
->ns
->proc_name
;
15700 if (sym
->attr
.dummy
15701 && ((proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_IN
)
15702 || proc
->attr
.function
))
15705 /* TODO: Sort out what can be storage associated, if anything, and include
15706 it here. In principle equivalences should be scanned but it does not
15707 seem to be possible to storage associate an impure variable this way. */
15712 /* Test whether a symbol is pure or not. For a NULL pointer, checks if the
15713 current namespace is inside a pure procedure. */
15716 gfc_pure (gfc_symbol
*sym
)
15718 symbol_attribute attr
;
15723 /* Check if the current namespace or one of its parents
15724 belongs to a pure procedure. */
15725 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15727 sym
= ns
->proc_name
;
15731 if (attr
.flavor
== FL_PROCEDURE
&& attr
.pure
)
15739 return attr
.flavor
== FL_PROCEDURE
&& attr
.pure
;
15743 /* Test whether a symbol is implicitly pure or not. For a NULL pointer,
15744 checks if the current namespace is implicitly pure. Note that this
15745 function returns false for a PURE procedure. */
15748 gfc_implicit_pure (gfc_symbol
*sym
)
15754 /* Check if the current procedure is implicit_pure. Walk up
15755 the procedure list until we find a procedure. */
15756 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15758 sym
= ns
->proc_name
;
15762 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15767 return sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.implicit_pure
15768 && !sym
->attr
.pure
;
15773 gfc_unset_implicit_pure (gfc_symbol
*sym
)
15779 /* Check if the current procedure is implicit_pure. Walk up
15780 the procedure list until we find a procedure. */
15781 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15783 sym
= ns
->proc_name
;
15787 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15792 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15793 sym
->attr
.implicit_pure
= 0;
15795 sym
->attr
.pure
= 0;
15799 /* Test whether the current procedure is elemental or not. */
15802 gfc_elemental (gfc_symbol
*sym
)
15804 symbol_attribute attr
;
15807 sym
= gfc_current_ns
->proc_name
;
15812 return attr
.flavor
== FL_PROCEDURE
&& attr
.elemental
;
15816 /* Warn about unused labels. */
15819 warn_unused_fortran_label (gfc_st_label
*label
)
15824 warn_unused_fortran_label (label
->left
);
15826 if (label
->defined
== ST_LABEL_UNKNOWN
)
15829 switch (label
->referenced
)
15831 case ST_LABEL_UNKNOWN
:
15832 gfc_warning (OPT_Wunused_label
, "Label %d at %L defined but not used",
15833 label
->value
, &label
->where
);
15836 case ST_LABEL_BAD_TARGET
:
15837 gfc_warning (OPT_Wunused_label
,
15838 "Label %d at %L defined but cannot be used",
15839 label
->value
, &label
->where
);
15846 warn_unused_fortran_label (label
->right
);
15850 /* Returns the sequence type of a symbol or sequence. */
15853 sequence_type (gfc_typespec ts
)
15862 if (ts
.u
.derived
->components
== NULL
)
15863 return SEQ_NONDEFAULT
;
15865 result
= sequence_type (ts
.u
.derived
->components
->ts
);
15866 for (c
= ts
.u
.derived
->components
->next
; c
; c
= c
->next
)
15867 if (sequence_type (c
->ts
) != result
)
15873 if (ts
.kind
!= gfc_default_character_kind
)
15874 return SEQ_NONDEFAULT
;
15876 return SEQ_CHARACTER
;
15879 if (ts
.kind
!= gfc_default_integer_kind
)
15880 return SEQ_NONDEFAULT
;
15882 return SEQ_NUMERIC
;
15885 if (!(ts
.kind
== gfc_default_real_kind
15886 || ts
.kind
== gfc_default_double_kind
))
15887 return SEQ_NONDEFAULT
;
15889 return SEQ_NUMERIC
;
15892 if (ts
.kind
!= gfc_default_complex_kind
)
15893 return SEQ_NONDEFAULT
;
15895 return SEQ_NUMERIC
;
15898 if (ts
.kind
!= gfc_default_logical_kind
)
15899 return SEQ_NONDEFAULT
;
15901 return SEQ_NUMERIC
;
15904 return SEQ_NONDEFAULT
;
15909 /* Resolve derived type EQUIVALENCE object. */
15912 resolve_equivalence_derived (gfc_symbol
*derived
, gfc_symbol
*sym
, gfc_expr
*e
)
15914 gfc_component
*c
= derived
->components
;
15919 /* Shall not be an object of nonsequence derived type. */
15920 if (!derived
->attr
.sequence
)
15922 gfc_error ("Derived type variable %qs at %L must have SEQUENCE "
15923 "attribute to be an EQUIVALENCE object", sym
->name
,
15928 /* Shall not have allocatable components. */
15929 if (derived
->attr
.alloc_comp
)
15931 gfc_error ("Derived type variable %qs at %L cannot have ALLOCATABLE "
15932 "components to be an EQUIVALENCE object",sym
->name
,
15937 if (sym
->attr
.in_common
&& gfc_has_default_initializer (sym
->ts
.u
.derived
))
15939 gfc_error ("Derived type variable %qs at %L with default "
15940 "initialization cannot be in EQUIVALENCE with a variable "
15941 "in COMMON", sym
->name
, &e
->where
);
15945 for (; c
; c
= c
->next
)
15947 if (gfc_bt_struct (c
->ts
.type
)
15948 && (!resolve_equivalence_derived(c
->ts
.u
.derived
, sym
, e
)))
15951 /* Shall not be an object of sequence derived type containing a pointer
15952 in the structure. */
15953 if (c
->attr
.pointer
)
15955 gfc_error ("Derived type variable %qs at %L with pointer "
15956 "component(s) cannot be an EQUIVALENCE object",
15957 sym
->name
, &e
->where
);
15965 /* Resolve equivalence object.
15966 An EQUIVALENCE object shall not be a dummy argument, a pointer, a target,
15967 an allocatable array, an object of nonsequence derived type, an object of
15968 sequence derived type containing a pointer at any level of component
15969 selection, an automatic object, a function name, an entry name, a result
15970 name, a named constant, a structure component, or a subobject of any of
15971 the preceding objects. A substring shall not have length zero. A
15972 derived type shall not have components with default initialization nor
15973 shall two objects of an equivalence group be initialized.
15974 Either all or none of the objects shall have an protected attribute.
15975 The simple constraints are done in symbol.c(check_conflict) and the rest
15976 are implemented here. */
15979 resolve_equivalence (gfc_equiv
*eq
)
15982 gfc_symbol
*first_sym
;
15985 locus
*last_where
= NULL
;
15986 seq_type eq_type
, last_eq_type
;
15987 gfc_typespec
*last_ts
;
15988 int object
, cnt_protected
;
15991 last_ts
= &eq
->expr
->symtree
->n
.sym
->ts
;
15993 first_sym
= eq
->expr
->symtree
->n
.sym
;
15997 for (object
= 1; eq
; eq
= eq
->eq
, object
++)
16001 e
->ts
= e
->symtree
->n
.sym
->ts
;
16002 /* match_varspec might not know yet if it is seeing
16003 array reference or substring reference, as it doesn't
16005 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
)
16007 gfc_ref
*ref
= e
->ref
;
16008 sym
= e
->symtree
->n
.sym
;
16010 if (sym
->attr
.dimension
)
16012 ref
->u
.ar
.as
= sym
->as
;
16016 /* For substrings, convert REF_ARRAY into REF_SUBSTRING. */
16017 if (e
->ts
.type
== BT_CHARACTER
16019 && ref
->type
== REF_ARRAY
16020 && ref
->u
.ar
.dimen
== 1
16021 && ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
16022 && ref
->u
.ar
.stride
[0] == NULL
)
16024 gfc_expr
*start
= ref
->u
.ar
.start
[0];
16025 gfc_expr
*end
= ref
->u
.ar
.end
[0];
16028 /* Optimize away the (:) reference. */
16029 if (start
== NULL
&& end
== NULL
)
16032 e
->ref
= ref
->next
;
16034 e
->ref
->next
= ref
->next
;
16039 ref
->type
= REF_SUBSTRING
;
16041 start
= gfc_get_int_expr (gfc_charlen_int_kind
,
16043 ref
->u
.ss
.start
= start
;
16044 if (end
== NULL
&& e
->ts
.u
.cl
)
16045 end
= gfc_copy_expr (e
->ts
.u
.cl
->length
);
16046 ref
->u
.ss
.end
= end
;
16047 ref
->u
.ss
.length
= e
->ts
.u
.cl
;
16054 /* Any further ref is an error. */
16057 gcc_assert (ref
->type
== REF_ARRAY
);
16058 gfc_error ("Syntax error in EQUIVALENCE statement at %L",
16064 if (!gfc_resolve_expr (e
))
16067 sym
= e
->symtree
->n
.sym
;
16069 if (sym
->attr
.is_protected
)
16071 if (cnt_protected
> 0 && cnt_protected
!= object
)
16073 gfc_error ("Either all or none of the objects in the "
16074 "EQUIVALENCE set at %L shall have the "
16075 "PROTECTED attribute",
16080 /* Shall not equivalence common block variables in a PURE procedure. */
16081 if (sym
->ns
->proc_name
16082 && sym
->ns
->proc_name
->attr
.pure
16083 && sym
->attr
.in_common
)
16085 /* Need to check for symbols that may have entered the pure
16086 procedure via a USE statement. */
16087 bool saw_sym
= false;
16088 if (sym
->ns
->use_stmts
)
16091 for (r
= sym
->ns
->use_stmts
->rename
; r
; r
= r
->next
)
16092 if (strcmp(r
->use_name
, sym
->name
) == 0) saw_sym
= true;
16098 gfc_error ("COMMON block member %qs at %L cannot be an "
16099 "EQUIVALENCE object in the pure procedure %qs",
16100 sym
->name
, &e
->where
, sym
->ns
->proc_name
->name
);
16104 /* Shall not be a named constant. */
16105 if (e
->expr_type
== EXPR_CONSTANT
)
16107 gfc_error ("Named constant %qs at %L cannot be an EQUIVALENCE "
16108 "object", sym
->name
, &e
->where
);
16112 if (e
->ts
.type
== BT_DERIVED
16113 && !resolve_equivalence_derived (e
->ts
.u
.derived
, sym
, e
))
16116 /* Check that the types correspond correctly:
16118 A numeric sequence structure may be equivalenced to another sequence
16119 structure, an object of default integer type, default real type, double
16120 precision real type, default logical type such that components of the
16121 structure ultimately only become associated to objects of the same
16122 kind. A character sequence structure may be equivalenced to an object
16123 of default character kind or another character sequence structure.
16124 Other objects may be equivalenced only to objects of the same type and
16125 kind parameters. */
16127 /* Identical types are unconditionally OK. */
16128 if (object
== 1 || gfc_compare_types (last_ts
, &sym
->ts
))
16129 goto identical_types
;
16131 last_eq_type
= sequence_type (*last_ts
);
16132 eq_type
= sequence_type (sym
->ts
);
16134 /* Since the pair of objects is not of the same type, mixed or
16135 non-default sequences can be rejected. */
16137 msg
= "Sequence %s with mixed components in EQUIVALENCE "
16138 "statement at %L with different type objects";
16140 && last_eq_type
== SEQ_MIXED
16141 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16142 || (eq_type
== SEQ_MIXED
16143 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16146 msg
= "Non-default type object or sequence %s in EQUIVALENCE "
16147 "statement at %L with objects of different type";
16149 && last_eq_type
== SEQ_NONDEFAULT
16150 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16151 || (eq_type
== SEQ_NONDEFAULT
16152 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16155 msg
="Non-CHARACTER object %qs in default CHARACTER "
16156 "EQUIVALENCE statement at %L";
16157 if (last_eq_type
== SEQ_CHARACTER
16158 && eq_type
!= SEQ_CHARACTER
16159 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16162 msg
="Non-NUMERIC object %qs in default NUMERIC "
16163 "EQUIVALENCE statement at %L";
16164 if (last_eq_type
== SEQ_NUMERIC
16165 && eq_type
!= SEQ_NUMERIC
16166 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16171 last_where
= &e
->where
;
16176 /* Shall not be an automatic array. */
16177 if (e
->ref
->type
== REF_ARRAY
16178 && !gfc_resolve_array_spec (e
->ref
->u
.ar
.as
, 1))
16180 gfc_error ("Array %qs at %L with non-constant bounds cannot be "
16181 "an EQUIVALENCE object", sym
->name
, &e
->where
);
16188 /* Shall not be a structure component. */
16189 if (r
->type
== REF_COMPONENT
)
16191 gfc_error ("Structure component %qs at %L cannot be an "
16192 "EQUIVALENCE object",
16193 r
->u
.c
.component
->name
, &e
->where
);
16197 /* A substring shall not have length zero. */
16198 if (r
->type
== REF_SUBSTRING
)
16200 if (compare_bound (r
->u
.ss
.start
, r
->u
.ss
.end
) == CMP_GT
)
16202 gfc_error ("Substring at %L has length zero",
16203 &r
->u
.ss
.start
->where
);
16213 /* Function called by resolve_fntype to flag other symbol used in the
16214 length type parameter specification of function resuls. */
16217 flag_fn_result_spec (gfc_expr
*expr
,
16218 gfc_symbol
*sym ATTRIBUTE_UNUSED
,
16219 int *f ATTRIBUTE_UNUSED
)
16224 if (expr
->expr_type
== EXPR_VARIABLE
)
16226 s
= expr
->symtree
->n
.sym
;
16227 for (ns
= s
->ns
; ns
; ns
= ns
->parent
)
16231 if (!s
->fn_result_spec
16232 && s
->attr
.flavor
== FL_PARAMETER
)
16234 /* Function contained in a module.... */
16235 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_MODULE
)
16238 s
->fn_result_spec
= 1;
16239 /* Make sure that this symbol is translated as a module
16241 st
= gfc_get_unique_symtree (ns
);
16245 /* ... which is use associated and called. */
16246 else if (s
->attr
.use_assoc
|| s
->attr
.used_in_submodule
16248 /* External function matched with an interface. */
16251 && s
->ns
->proc_name
->attr
.if_source
== IFSRC_DECL
)
16252 || s
->ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16253 && s
->ns
->proc_name
->attr
.function
))
16254 s
->fn_result_spec
= 1;
16261 /* Resolve function and ENTRY types, issue diagnostics if needed. */
16264 resolve_fntype (gfc_namespace
*ns
)
16266 gfc_entry_list
*el
;
16269 if (ns
->proc_name
== NULL
|| !ns
->proc_name
->attr
.function
)
16272 /* If there are any entries, ns->proc_name is the entry master
16273 synthetic symbol and ns->entries->sym actual FUNCTION symbol. */
16275 sym
= ns
->entries
->sym
;
16277 sym
= ns
->proc_name
;
16278 if (sym
->result
== sym
16279 && sym
->ts
.type
== BT_UNKNOWN
16280 && !gfc_set_default_type (sym
, 0, NULL
)
16281 && !sym
->attr
.untyped
)
16283 gfc_error ("Function %qs at %L has no IMPLICIT type",
16284 sym
->name
, &sym
->declared_at
);
16285 sym
->attr
.untyped
= 1;
16288 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->ts
.u
.derived
->attr
.use_assoc
16289 && !sym
->attr
.contained
16290 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
16291 && gfc_check_symbol_access (sym
))
16293 gfc_notify_std (GFC_STD_F2003
, "PUBLIC function %qs at "
16294 "%L of PRIVATE type %qs", sym
->name
,
16295 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
16299 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
16301 if (el
->sym
->result
== el
->sym
16302 && el
->sym
->ts
.type
== BT_UNKNOWN
16303 && !gfc_set_default_type (el
->sym
, 0, NULL
)
16304 && !el
->sym
->attr
.untyped
)
16306 gfc_error ("ENTRY %qs at %L has no IMPLICIT type",
16307 el
->sym
->name
, &el
->sym
->declared_at
);
16308 el
->sym
->attr
.untyped
= 1;
16312 if (sym
->ts
.type
== BT_CHARACTER
)
16313 gfc_traverse_expr (sym
->ts
.u
.cl
->length
, NULL
, flag_fn_result_spec
, 0);
16317 /* 12.3.2.1.1 Defined operators. */
16320 check_uop_procedure (gfc_symbol
*sym
, locus where
)
16322 gfc_formal_arglist
*formal
;
16324 if (!sym
->attr
.function
)
16326 gfc_error ("User operator procedure %qs at %L must be a FUNCTION",
16327 sym
->name
, &where
);
16331 if (sym
->ts
.type
== BT_CHARACTER
16332 && !((sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
) || sym
->ts
.deferred
)
16333 && !(sym
->result
&& ((sym
->result
->ts
.u
.cl
16334 && sym
->result
->ts
.u
.cl
->length
) || sym
->result
->ts
.deferred
)))
16336 gfc_error ("User operator procedure %qs at %L cannot be assumed "
16337 "character length", sym
->name
, &where
);
16341 formal
= gfc_sym_get_dummy_args (sym
);
16342 if (!formal
|| !formal
->sym
)
16344 gfc_error ("User operator procedure %qs at %L must have at least "
16345 "one argument", sym
->name
, &where
);
16349 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16351 gfc_error ("First argument of operator interface at %L must be "
16352 "INTENT(IN)", &where
);
16356 if (formal
->sym
->attr
.optional
)
16358 gfc_error ("First argument of operator interface at %L cannot be "
16359 "optional", &where
);
16363 formal
= formal
->next
;
16364 if (!formal
|| !formal
->sym
)
16367 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16369 gfc_error ("Second argument of operator interface at %L must be "
16370 "INTENT(IN)", &where
);
16374 if (formal
->sym
->attr
.optional
)
16376 gfc_error ("Second argument of operator interface at %L cannot be "
16377 "optional", &where
);
16383 gfc_error ("Operator interface at %L must have, at most, two "
16384 "arguments", &where
);
16392 gfc_resolve_uops (gfc_symtree
*symtree
)
16394 gfc_interface
*itr
;
16396 if (symtree
== NULL
)
16399 gfc_resolve_uops (symtree
->left
);
16400 gfc_resolve_uops (symtree
->right
);
16402 for (itr
= symtree
->n
.uop
->op
; itr
; itr
= itr
->next
)
16403 check_uop_procedure (itr
->sym
, itr
->sym
->declared_at
);
16407 /* Examine all of the expressions associated with a program unit,
16408 assign types to all intermediate expressions, make sure that all
16409 assignments are to compatible types and figure out which names
16410 refer to which functions or subroutines. It doesn't check code
16411 block, which is handled by gfc_resolve_code. */
16414 resolve_types (gfc_namespace
*ns
)
16420 gfc_namespace
* old_ns
= gfc_current_ns
;
16422 if (ns
->types_resolved
)
16425 /* Check that all IMPLICIT types are ok. */
16426 if (!ns
->seen_implicit_none
)
16429 for (letter
= 0; letter
!= GFC_LETTERS
; ++letter
)
16430 if (ns
->set_flag
[letter
]
16431 && !resolve_typespec_used (&ns
->default_type
[letter
],
16432 &ns
->implicit_loc
[letter
], NULL
))
16436 gfc_current_ns
= ns
;
16438 resolve_entries (ns
);
16440 resolve_common_vars (&ns
->blank_common
, false);
16441 resolve_common_blocks (ns
->common_root
);
16443 resolve_contained_functions (ns
);
16445 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
16446 && ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16447 resolve_formal_arglist (ns
->proc_name
);
16449 gfc_traverse_ns (ns
, resolve_bind_c_derived_types
);
16451 for (cl
= ns
->cl_list
; cl
; cl
= cl
->next
)
16452 resolve_charlen (cl
);
16454 gfc_traverse_ns (ns
, resolve_symbol
);
16456 resolve_fntype (ns
);
16458 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16460 if (gfc_pure (ns
->proc_name
) && !gfc_pure (n
->proc_name
))
16461 gfc_error ("Contained procedure %qs at %L of a PURE procedure must "
16462 "also be PURE", n
->proc_name
->name
,
16463 &n
->proc_name
->declared_at
);
16469 gfc_do_concurrent_flag
= 0;
16470 gfc_check_interfaces (ns
);
16472 gfc_traverse_ns (ns
, resolve_values
);
16478 for (d
= ns
->data
; d
; d
= d
->next
)
16482 gfc_traverse_ns (ns
, gfc_formalize_init_value
);
16484 gfc_traverse_ns (ns
, gfc_verify_binding_labels
);
16486 for (eq
= ns
->equiv
; eq
; eq
= eq
->next
)
16487 resolve_equivalence (eq
);
16489 /* Warn about unused labels. */
16490 if (warn_unused_label
)
16491 warn_unused_fortran_label (ns
->st_labels
);
16493 gfc_resolve_uops (ns
->uop_root
);
16495 gfc_traverse_ns (ns
, gfc_verify_DTIO_procedures
);
16497 gfc_resolve_omp_declare_simd (ns
);
16499 gfc_resolve_omp_udrs (ns
->omp_udr_root
);
16501 ns
->types_resolved
= 1;
16503 gfc_current_ns
= old_ns
;
16507 /* Call gfc_resolve_code recursively. */
16510 resolve_codes (gfc_namespace
*ns
)
16513 bitmap_obstack old_obstack
;
16515 if (ns
->resolved
== 1)
16518 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16521 gfc_current_ns
= ns
;
16523 /* Don't clear 'cs_base' if this is the namespace of a BLOCK construct. */
16524 if (!(ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_LABEL
))
16527 /* Set to an out of range value. */
16528 current_entry_id
= -1;
16530 old_obstack
= labels_obstack
;
16531 bitmap_obstack_initialize (&labels_obstack
);
16533 gfc_resolve_oacc_declare (ns
);
16534 gfc_resolve_omp_local_vars (ns
);
16535 gfc_resolve_code (ns
->code
, ns
);
16537 bitmap_obstack_release (&labels_obstack
);
16538 labels_obstack
= old_obstack
;
16542 /* This function is called after a complete program unit has been compiled.
16543 Its purpose is to examine all of the expressions associated with a program
16544 unit, assign types to all intermediate expressions, make sure that all
16545 assignments are to compatible types and figure out which names refer to
16546 which functions or subroutines. */
16549 gfc_resolve (gfc_namespace
*ns
)
16551 gfc_namespace
*old_ns
;
16552 code_stack
*old_cs_base
;
16553 struct gfc_omp_saved_state old_omp_state
;
16559 old_ns
= gfc_current_ns
;
16560 old_cs_base
= cs_base
;
16562 /* As gfc_resolve can be called during resolution of an OpenMP construct
16563 body, we should clear any state associated to it, so that say NS's
16564 DO loops are not interpreted as OpenMP loops. */
16565 if (!ns
->construct_entities
)
16566 gfc_omp_save_and_clear_state (&old_omp_state
);
16568 resolve_types (ns
);
16569 component_assignment_level
= 0;
16570 resolve_codes (ns
);
16572 gfc_current_ns
= old_ns
;
16573 cs_base
= old_cs_base
;
16576 gfc_run_passes (ns
);
16578 if (!ns
->construct_entities
)
16579 gfc_omp_restore_state (&old_omp_state
);