1 /* Perform type resolution on the various structures.
2 Copyright (C) 2001-2019 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
)
589 /* Try to find out of what the return type is. */
590 if (sym
->result
->ts
.type
== BT_UNKNOWN
&& sym
->result
->ts
.interface
== NULL
)
592 t
= gfc_set_default_type (sym
->result
, 0, ns
);
594 if (!t
&& !sym
->result
->attr
.untyped
)
596 if (sym
->result
== sym
)
597 gfc_error ("Contained function %qs at %L has no IMPLICIT type",
598 sym
->name
, &sym
->declared_at
);
599 else if (!sym
->result
->attr
.proc_pointer
)
600 gfc_error ("Result %qs of contained function %qs at %L has "
601 "no IMPLICIT type", sym
->result
->name
, sym
->name
,
602 &sym
->result
->declared_at
);
603 sym
->result
->attr
.untyped
= 1;
607 /* Fortran 2008 Draft Standard, page 535, C418, on type-param-value
608 type, lists the only ways a character length value of * can be used:
609 dummy arguments of procedures, named constants, function results and
610 in allocate statements if the allocate_object is an assumed length dummy
611 in external functions. Internal function results and results of module
612 procedures are not on this list, ergo, not permitted. */
614 if (sym
->result
->ts
.type
== BT_CHARACTER
)
616 gfc_charlen
*cl
= sym
->result
->ts
.u
.cl
;
617 if ((!cl
|| !cl
->length
) && !sym
->result
->ts
.deferred
)
619 /* See if this is a module-procedure and adapt error message
622 gcc_assert (ns
->parent
&& ns
->parent
->proc_name
);
623 module_proc
= (ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
);
625 gfc_error (module_proc
626 ? G_("Character-valued module procedure %qs at %L"
627 " must not be assumed length")
628 : G_("Character-valued internal function %qs at %L"
629 " must not be assumed length"),
630 sym
->name
, &sym
->declared_at
);
636 /* Add NEW_ARGS to the formal argument list of PROC, taking care not to
637 introduce duplicates. */
640 merge_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
642 gfc_formal_arglist
*f
, *new_arglist
;
645 for (; new_args
!= NULL
; new_args
= new_args
->next
)
647 new_sym
= new_args
->sym
;
648 /* See if this arg is already in the formal argument list. */
649 for (f
= proc
->formal
; f
; f
= f
->next
)
651 if (new_sym
== f
->sym
)
658 /* Add a new argument. Argument order is not important. */
659 new_arglist
= gfc_get_formal_arglist ();
660 new_arglist
->sym
= new_sym
;
661 new_arglist
->next
= proc
->formal
;
662 proc
->formal
= new_arglist
;
667 /* Flag the arguments that are not present in all entries. */
670 check_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
672 gfc_formal_arglist
*f
, *head
;
675 for (f
= proc
->formal
; f
; f
= f
->next
)
680 for (new_args
= head
; new_args
; new_args
= new_args
->next
)
682 if (new_args
->sym
== f
->sym
)
689 f
->sym
->attr
.not_always_present
= 1;
694 /* Resolve alternate entry points. If a symbol has multiple entry points we
695 create a new master symbol for the main routine, and turn the existing
696 symbol into an entry point. */
699 resolve_entries (gfc_namespace
*ns
)
701 gfc_namespace
*old_ns
;
705 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
706 static int master_count
= 0;
708 if (ns
->proc_name
== NULL
)
711 /* No need to do anything if this procedure doesn't have alternate entry
716 /* We may already have resolved alternate entry points. */
717 if (ns
->proc_name
->attr
.entry_master
)
720 /* If this isn't a procedure something has gone horribly wrong. */
721 gcc_assert (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
);
723 /* Remember the current namespace. */
724 old_ns
= gfc_current_ns
;
728 /* Add the main entry point to the list of entry points. */
729 el
= gfc_get_entry_list ();
730 el
->sym
= ns
->proc_name
;
732 el
->next
= ns
->entries
;
734 ns
->proc_name
->attr
.entry
= 1;
736 /* If it is a module function, it needs to be in the right namespace
737 so that gfc_get_fake_result_decl can gather up the results. The
738 need for this arose in get_proc_name, where these beasts were
739 left in their own namespace, to keep prior references linked to
740 the entry declaration.*/
741 if (ns
->proc_name
->attr
.function
742 && ns
->parent
&& ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
745 /* Do the same for entries where the master is not a module
746 procedure. These are retained in the module namespace because
747 of the module procedure declaration. */
748 for (el
= el
->next
; el
; el
= el
->next
)
749 if (el
->sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
750 && el
->sym
->attr
.mod_proc
)
754 /* Add an entry statement for it. */
755 c
= gfc_get_code (EXEC_ENTRY
);
760 /* Create a new symbol for the master function. */
761 /* Give the internal function a unique name (within this file).
762 Also include the function name so the user has some hope of figuring
763 out what is going on. */
764 snprintf (name
, GFC_MAX_SYMBOL_LEN
, "master.%d.%s",
765 master_count
++, ns
->proc_name
->name
);
766 gfc_get_ha_symbol (name
, &proc
);
767 gcc_assert (proc
!= NULL
);
769 gfc_add_procedure (&proc
->attr
, PROC_INTERNAL
, proc
->name
, NULL
);
770 if (ns
->proc_name
->attr
.subroutine
)
771 gfc_add_subroutine (&proc
->attr
, proc
->name
, NULL
);
775 gfc_typespec
*ts
, *fts
;
776 gfc_array_spec
*as
, *fas
;
777 gfc_add_function (&proc
->attr
, proc
->name
, NULL
);
779 fas
= ns
->entries
->sym
->as
;
780 fas
= fas
? fas
: ns
->entries
->sym
->result
->as
;
781 fts
= &ns
->entries
->sym
->result
->ts
;
782 if (fts
->type
== BT_UNKNOWN
)
783 fts
= gfc_get_default_type (ns
->entries
->sym
->result
->name
, NULL
);
784 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
786 ts
= &el
->sym
->result
->ts
;
788 as
= as
? as
: el
->sym
->result
->as
;
789 if (ts
->type
== BT_UNKNOWN
)
790 ts
= gfc_get_default_type (el
->sym
->result
->name
, NULL
);
792 if (! gfc_compare_types (ts
, fts
)
793 || (el
->sym
->result
->attr
.dimension
794 != ns
->entries
->sym
->result
->attr
.dimension
)
795 || (el
->sym
->result
->attr
.pointer
796 != ns
->entries
->sym
->result
->attr
.pointer
))
798 else if (as
&& fas
&& ns
->entries
->sym
->result
!= el
->sym
->result
799 && gfc_compare_array_spec (as
, fas
) == 0)
800 gfc_error ("Function %s at %L has entries with mismatched "
801 "array specifications", ns
->entries
->sym
->name
,
802 &ns
->entries
->sym
->declared_at
);
803 /* The characteristics need to match and thus both need to have
804 the same string length, i.e. both len=*, or both len=4.
805 Having both len=<variable> is also possible, but difficult to
806 check at compile time. */
807 else if (ts
->type
== BT_CHARACTER
&& ts
->u
.cl
&& fts
->u
.cl
808 && (((ts
->u
.cl
->length
&& !fts
->u
.cl
->length
)
809 ||(!ts
->u
.cl
->length
&& fts
->u
.cl
->length
))
811 && ts
->u
.cl
->length
->expr_type
812 != fts
->u
.cl
->length
->expr_type
)
814 && ts
->u
.cl
->length
->expr_type
== EXPR_CONSTANT
815 && mpz_cmp (ts
->u
.cl
->length
->value
.integer
,
816 fts
->u
.cl
->length
->value
.integer
) != 0)))
817 gfc_notify_std (GFC_STD_GNU
, "Function %s at %L with "
818 "entries returning variables of different "
819 "string lengths", ns
->entries
->sym
->name
,
820 &ns
->entries
->sym
->declared_at
);
825 sym
= ns
->entries
->sym
->result
;
826 /* All result types the same. */
828 if (sym
->attr
.dimension
)
829 gfc_set_array_spec (proc
, gfc_copy_array_spec (sym
->as
), NULL
);
830 if (sym
->attr
.pointer
)
831 gfc_add_pointer (&proc
->attr
, NULL
);
835 /* Otherwise the result will be passed through a union by
837 proc
->attr
.mixed_entry_master
= 1;
838 for (el
= ns
->entries
; el
; el
= el
->next
)
840 sym
= el
->sym
->result
;
841 if (sym
->attr
.dimension
)
843 if (el
== ns
->entries
)
844 gfc_error ("FUNCTION result %s cannot be an array in "
845 "FUNCTION %s at %L", sym
->name
,
846 ns
->entries
->sym
->name
, &sym
->declared_at
);
848 gfc_error ("ENTRY result %s cannot be an array in "
849 "FUNCTION %s at %L", sym
->name
,
850 ns
->entries
->sym
->name
, &sym
->declared_at
);
852 else if (sym
->attr
.pointer
)
854 if (el
== ns
->entries
)
855 gfc_error ("FUNCTION result %s cannot be a POINTER in "
856 "FUNCTION %s at %L", sym
->name
,
857 ns
->entries
->sym
->name
, &sym
->declared_at
);
859 gfc_error ("ENTRY result %s cannot be a POINTER in "
860 "FUNCTION %s at %L", sym
->name
,
861 ns
->entries
->sym
->name
, &sym
->declared_at
);
866 if (ts
->type
== BT_UNKNOWN
)
867 ts
= gfc_get_default_type (sym
->name
, NULL
);
871 if (ts
->kind
== gfc_default_integer_kind
)
875 if (ts
->kind
== gfc_default_real_kind
876 || ts
->kind
== gfc_default_double_kind
)
880 if (ts
->kind
== gfc_default_complex_kind
)
884 if (ts
->kind
== gfc_default_logical_kind
)
888 /* We will issue error elsewhere. */
896 if (el
== ns
->entries
)
897 gfc_error ("FUNCTION result %s cannot be of type %s "
898 "in FUNCTION %s at %L", sym
->name
,
899 gfc_typename (ts
), ns
->entries
->sym
->name
,
902 gfc_error ("ENTRY result %s cannot be of type %s "
903 "in FUNCTION %s at %L", sym
->name
,
904 gfc_typename (ts
), ns
->entries
->sym
->name
,
911 proc
->attr
.access
= ACCESS_PRIVATE
;
912 proc
->attr
.entry_master
= 1;
914 /* Merge all the entry point arguments. */
915 for (el
= ns
->entries
; el
; el
= el
->next
)
916 merge_argument_lists (proc
, el
->sym
->formal
);
918 /* Check the master formal arguments for any that are not
919 present in all entry points. */
920 for (el
= ns
->entries
; el
; el
= el
->next
)
921 check_argument_lists (proc
, el
->sym
->formal
);
923 /* Use the master function for the function body. */
924 ns
->proc_name
= proc
;
926 /* Finalize the new symbols. */
927 gfc_commit_symbols ();
929 /* Restore the original namespace. */
930 gfc_current_ns
= old_ns
;
934 /* Resolve common variables. */
936 resolve_common_vars (gfc_common_head
*common_block
, bool named_common
)
938 gfc_symbol
*csym
= common_block
->head
;
940 for (; csym
; csym
= csym
->common_next
)
942 /* gfc_add_in_common may have been called before, but the reported errors
943 have been ignored to continue parsing.
944 We do the checks again here. */
945 if (!csym
->attr
.use_assoc
)
947 gfc_add_in_common (&csym
->attr
, csym
->name
, &common_block
->where
);
948 gfc_notify_std (GFC_STD_F2018_OBS
, "COMMON block at %L",
949 &common_block
->where
);
952 if (csym
->value
|| csym
->attr
.data
)
954 if (!csym
->ns
->is_block_data
)
955 gfc_notify_std (GFC_STD_GNU
, "Variable %qs at %L is in COMMON "
956 "but only in BLOCK DATA initialization is "
957 "allowed", csym
->name
, &csym
->declared_at
);
958 else if (!named_common
)
959 gfc_notify_std (GFC_STD_GNU
, "Initialized variable %qs at %L is "
960 "in a blank COMMON but initialization is only "
961 "allowed in named common blocks", csym
->name
,
965 if (UNLIMITED_POLY (csym
))
966 gfc_error_now ("%qs in cannot appear in COMMON at %L "
967 "[F2008:C5100]", csym
->name
, &csym
->declared_at
);
969 if (csym
->ts
.type
!= BT_DERIVED
)
972 if (!(csym
->ts
.u
.derived
->attr
.sequence
973 || csym
->ts
.u
.derived
->attr
.is_bind_c
))
974 gfc_error_now ("Derived type variable %qs in COMMON at %L "
975 "has neither the SEQUENCE nor the BIND(C) "
976 "attribute", csym
->name
, &csym
->declared_at
);
977 if (csym
->ts
.u
.derived
->attr
.alloc_comp
)
978 gfc_error_now ("Derived type variable %qs in COMMON at %L "
979 "has an ultimate component that is "
980 "allocatable", csym
->name
, &csym
->declared_at
);
981 if (gfc_has_default_initializer (csym
->ts
.u
.derived
))
982 gfc_error_now ("Derived type variable %qs in COMMON at %L "
983 "may not have default initializer", csym
->name
,
986 if (csym
->attr
.flavor
== FL_UNKNOWN
&& !csym
->attr
.proc_pointer
)
987 gfc_add_flavor (&csym
->attr
, FL_VARIABLE
, csym
->name
, &csym
->declared_at
);
991 /* Resolve common blocks. */
993 resolve_common_blocks (gfc_symtree
*common_root
)
998 if (common_root
== NULL
)
1001 if (common_root
->left
)
1002 resolve_common_blocks (common_root
->left
);
1003 if (common_root
->right
)
1004 resolve_common_blocks (common_root
->right
);
1006 resolve_common_vars (common_root
->n
.common
, true);
1008 /* The common name is a global name - in Fortran 2003 also if it has a
1009 C binding name, since Fortran 2008 only the C binding name is a global
1011 if (!common_root
->n
.common
->binding_label
1012 || gfc_notification_std (GFC_STD_F2008
))
1014 gsym
= gfc_find_gsymbol (gfc_gsym_root
,
1015 common_root
->n
.common
->name
);
1017 if (gsym
&& gfc_notification_std (GFC_STD_F2008
)
1018 && gsym
->type
== GSYM_COMMON
1019 && ((common_root
->n
.common
->binding_label
1020 && (!gsym
->binding_label
1021 || strcmp (common_root
->n
.common
->binding_label
,
1022 gsym
->binding_label
) != 0))
1023 || (!common_root
->n
.common
->binding_label
1024 && gsym
->binding_label
)))
1026 gfc_error ("In Fortran 2003 COMMON %qs block at %L is a global "
1027 "identifier and must thus have the same binding name "
1028 "as the same-named COMMON block at %L: %s vs %s",
1029 common_root
->n
.common
->name
, &common_root
->n
.common
->where
,
1031 common_root
->n
.common
->binding_label
1032 ? common_root
->n
.common
->binding_label
: "(blank)",
1033 gsym
->binding_label
? gsym
->binding_label
: "(blank)");
1037 if (gsym
&& gsym
->type
!= GSYM_COMMON
1038 && !common_root
->n
.common
->binding_label
)
1040 gfc_error ("COMMON block %qs at %L uses the same global identifier "
1042 common_root
->n
.common
->name
, &common_root
->n
.common
->where
,
1046 if (gsym
&& gsym
->type
!= GSYM_COMMON
)
1048 gfc_error ("Fortran 2008: COMMON block %qs with binding label at "
1049 "%L sharing the identifier with global non-COMMON-block "
1050 "entity at %L", common_root
->n
.common
->name
,
1051 &common_root
->n
.common
->where
, &gsym
->where
);
1056 gsym
= gfc_get_gsymbol (common_root
->n
.common
->name
, false);
1057 gsym
->type
= GSYM_COMMON
;
1058 gsym
->where
= common_root
->n
.common
->where
;
1064 if (common_root
->n
.common
->binding_label
)
1066 gsym
= gfc_find_gsymbol (gfc_gsym_root
,
1067 common_root
->n
.common
->binding_label
);
1068 if (gsym
&& gsym
->type
!= GSYM_COMMON
)
1070 gfc_error ("COMMON block at %L with binding label %qs uses the same "
1071 "global identifier as entity at %L",
1072 &common_root
->n
.common
->where
,
1073 common_root
->n
.common
->binding_label
, &gsym
->where
);
1078 gsym
= gfc_get_gsymbol (common_root
->n
.common
->binding_label
, true);
1079 gsym
->type
= GSYM_COMMON
;
1080 gsym
->where
= common_root
->n
.common
->where
;
1086 gfc_find_symbol (common_root
->name
, gfc_current_ns
, 0, &sym
);
1090 if (sym
->attr
.flavor
== FL_PARAMETER
)
1091 gfc_error ("COMMON block %qs at %L is used as PARAMETER at %L",
1092 sym
->name
, &common_root
->n
.common
->where
, &sym
->declared_at
);
1094 if (sym
->attr
.external
)
1095 gfc_error ("COMMON block %qs at %L cannot have the EXTERNAL attribute",
1096 sym
->name
, &common_root
->n
.common
->where
);
1098 if (sym
->attr
.intrinsic
)
1099 gfc_error ("COMMON block %qs at %L is also an intrinsic procedure",
1100 sym
->name
, &common_root
->n
.common
->where
);
1101 else if (sym
->attr
.result
1102 || gfc_is_function_return_value (sym
, gfc_current_ns
))
1103 gfc_notify_std (GFC_STD_F2003
, "COMMON block %qs at %L "
1104 "that is also a function result", sym
->name
,
1105 &common_root
->n
.common
->where
);
1106 else if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.proc
!= PROC_INTERNAL
1107 && sym
->attr
.proc
!= PROC_ST_FUNCTION
)
1108 gfc_notify_std (GFC_STD_F2003
, "COMMON block %qs at %L "
1109 "that is also a global procedure", sym
->name
,
1110 &common_root
->n
.common
->where
);
1114 /* Resolve contained function types. Because contained functions can call one
1115 another, they have to be worked out before any of the contained procedures
1118 The good news is that if a function doesn't already have a type, the only
1119 way it can get one is through an IMPLICIT type or a RESULT variable, because
1120 by definition contained functions are contained namespace they're contained
1121 in, not in a sibling or parent namespace. */
1124 resolve_contained_functions (gfc_namespace
*ns
)
1126 gfc_namespace
*child
;
1129 resolve_formal_arglists (ns
);
1131 for (child
= ns
->contained
; child
; child
= child
->sibling
)
1133 /* Resolve alternate entry points first. */
1134 resolve_entries (child
);
1136 /* Then check function return types. */
1137 resolve_contained_fntype (child
->proc_name
, child
);
1138 for (el
= child
->entries
; el
; el
= el
->next
)
1139 resolve_contained_fntype (el
->sym
, child
);
1145 /* A Parameterized Derived Type constructor must contain values for
1146 the PDT KIND parameters or they must have a default initializer.
1147 Go through the constructor picking out the KIND expressions,
1148 storing them in 'param_list' and then call gfc_get_pdt_instance
1149 to obtain the PDT instance. */
1151 static gfc_actual_arglist
*param_list
, *param_tail
, *param
;
1154 get_pdt_spec_expr (gfc_component
*c
, gfc_expr
*expr
)
1156 param
= gfc_get_actual_arglist ();
1158 param_list
= param_tail
= param
;
1161 param_tail
->next
= param
;
1162 param_tail
= param_tail
->next
;
1165 param_tail
->name
= c
->name
;
1167 param_tail
->expr
= gfc_copy_expr (expr
);
1168 else if (c
->initializer
)
1169 param_tail
->expr
= gfc_copy_expr (c
->initializer
);
1172 param_tail
->spec_type
= SPEC_ASSUMED
;
1173 if (c
->attr
.pdt_kind
)
1175 gfc_error ("The KIND parameter %qs in the PDT constructor "
1176 "at %C has no value", param
->name
);
1185 get_pdt_constructor (gfc_expr
*expr
, gfc_constructor
**constr
,
1186 gfc_symbol
*derived
)
1188 gfc_constructor
*cons
= NULL
;
1189 gfc_component
*comp
;
1192 if (expr
&& expr
->expr_type
== EXPR_STRUCTURE
)
1193 cons
= gfc_constructor_first (expr
->value
.constructor
);
1198 comp
= derived
->components
;
1200 for (; comp
&& cons
; comp
= comp
->next
, cons
= gfc_constructor_next (cons
))
1203 && cons
->expr
->expr_type
== EXPR_STRUCTURE
1204 && comp
->ts
.type
== BT_DERIVED
)
1206 t
= get_pdt_constructor (cons
->expr
, NULL
, comp
->ts
.u
.derived
);
1210 else if (comp
->ts
.type
== BT_DERIVED
)
1212 t
= get_pdt_constructor (NULL
, &cons
, comp
->ts
.u
.derived
);
1216 else if ((comp
->attr
.pdt_kind
|| comp
->attr
.pdt_len
)
1217 && derived
->attr
.pdt_template
)
1219 t
= get_pdt_spec_expr (comp
, cons
->expr
);
1228 static bool resolve_fl_derived0 (gfc_symbol
*sym
);
1229 static bool resolve_fl_struct (gfc_symbol
*sym
);
1232 /* Resolve all of the elements of a structure constructor and make sure that
1233 the types are correct. The 'init' flag indicates that the given
1234 constructor is an initializer. */
1237 resolve_structure_cons (gfc_expr
*expr
, int init
)
1239 gfc_constructor
*cons
;
1240 gfc_component
*comp
;
1246 if (expr
->ts
.type
== BT_DERIVED
|| expr
->ts
.type
== BT_UNION
)
1248 if (expr
->ts
.u
.derived
->attr
.flavor
== FL_DERIVED
)
1249 resolve_fl_derived0 (expr
->ts
.u
.derived
);
1251 resolve_fl_struct (expr
->ts
.u
.derived
);
1253 /* If this is a Parameterized Derived Type template, find the
1254 instance corresponding to the PDT kind parameters. */
1255 if (expr
->ts
.u
.derived
->attr
.pdt_template
)
1258 t
= get_pdt_constructor (expr
, NULL
, expr
->ts
.u
.derived
);
1261 gfc_get_pdt_instance (param_list
, &expr
->ts
.u
.derived
, NULL
);
1263 expr
->param_list
= gfc_copy_actual_arglist (param_list
);
1266 gfc_free_actual_arglist (param_list
);
1268 if (!expr
->ts
.u
.derived
->attr
.pdt_type
)
1273 cons
= gfc_constructor_first (expr
->value
.constructor
);
1275 /* A constructor may have references if it is the result of substituting a
1276 parameter variable. In this case we just pull out the component we
1279 comp
= expr
->ref
->u
.c
.sym
->components
;
1281 comp
= expr
->ts
.u
.derived
->components
;
1283 for (; comp
&& cons
; comp
= comp
->next
, cons
= gfc_constructor_next (cons
))
1290 /* Unions use an EXPR_NULL contrived expression to tell the translation
1291 phase to generate an initializer of the appropriate length.
1293 if (cons
->expr
->ts
.type
== BT_UNION
&& cons
->expr
->expr_type
== EXPR_NULL
)
1296 if (!gfc_resolve_expr (cons
->expr
))
1302 rank
= comp
->as
? comp
->as
->rank
: 0;
1303 if (comp
->ts
.type
== BT_CLASS
1304 && !comp
->ts
.u
.derived
->attr
.unlimited_polymorphic
1305 && CLASS_DATA (comp
)->as
)
1306 rank
= CLASS_DATA (comp
)->as
->rank
;
1308 if (cons
->expr
->expr_type
!= EXPR_NULL
&& rank
!= cons
->expr
->rank
1309 && (comp
->attr
.allocatable
|| cons
->expr
->rank
))
1311 gfc_error ("The rank of the element in the structure "
1312 "constructor at %L does not match that of the "
1313 "component (%d/%d)", &cons
->expr
->where
,
1314 cons
->expr
->rank
, rank
);
1318 /* If we don't have the right type, try to convert it. */
1320 if (!comp
->attr
.proc_pointer
&&
1321 !gfc_compare_types (&cons
->expr
->ts
, &comp
->ts
))
1323 if (strcmp (comp
->name
, "_extends") == 0)
1325 /* Can afford to be brutal with the _extends initializer.
1326 The derived type can get lost because it is PRIVATE
1327 but it is not usage constrained by the standard. */
1328 cons
->expr
->ts
= comp
->ts
;
1330 else if (comp
->attr
.pointer
&& cons
->expr
->ts
.type
!= BT_UNKNOWN
)
1332 gfc_error ("The element in the structure constructor at %L, "
1333 "for pointer component %qs, is %s but should be %s",
1334 &cons
->expr
->where
, comp
->name
,
1335 gfc_basic_typename (cons
->expr
->ts
.type
),
1336 gfc_basic_typename (comp
->ts
.type
));
1341 bool t2
= gfc_convert_type (cons
->expr
, &comp
->ts
, 1);
1347 /* For strings, the length of the constructor should be the same as
1348 the one of the structure, ensure this if the lengths are known at
1349 compile time and when we are dealing with PARAMETER or structure
1351 if (cons
->expr
->ts
.type
== BT_CHARACTER
&& comp
->ts
.u
.cl
1352 && comp
->ts
.u
.cl
->length
1353 && comp
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
1354 && cons
->expr
->ts
.u
.cl
&& cons
->expr
->ts
.u
.cl
->length
1355 && cons
->expr
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
1356 && cons
->expr
->rank
!= 0
1357 && mpz_cmp (cons
->expr
->ts
.u
.cl
->length
->value
.integer
,
1358 comp
->ts
.u
.cl
->length
->value
.integer
) != 0)
1360 if (cons
->expr
->expr_type
== EXPR_VARIABLE
1361 && cons
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
)
1363 /* Wrap the parameter in an array constructor (EXPR_ARRAY)
1364 to make use of the gfc_resolve_character_array_constructor
1365 machinery. The expression is later simplified away to
1366 an array of string literals. */
1367 gfc_expr
*para
= cons
->expr
;
1368 cons
->expr
= gfc_get_expr ();
1369 cons
->expr
->ts
= para
->ts
;
1370 cons
->expr
->where
= para
->where
;
1371 cons
->expr
->expr_type
= EXPR_ARRAY
;
1372 cons
->expr
->rank
= para
->rank
;
1373 cons
->expr
->shape
= gfc_copy_shape (para
->shape
, para
->rank
);
1374 gfc_constructor_append_expr (&cons
->expr
->value
.constructor
,
1375 para
, &cons
->expr
->where
);
1378 if (cons
->expr
->expr_type
== EXPR_ARRAY
)
1380 /* Rely on the cleanup of the namespace to deal correctly with
1381 the old charlen. (There was a block here that attempted to
1382 remove the charlen but broke the chain in so doing.) */
1383 cons
->expr
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1384 cons
->expr
->ts
.u
.cl
->length_from_typespec
= true;
1385 cons
->expr
->ts
.u
.cl
->length
= gfc_copy_expr (comp
->ts
.u
.cl
->length
);
1386 gfc_resolve_character_array_constructor (cons
->expr
);
1390 if (cons
->expr
->expr_type
== EXPR_NULL
1391 && !(comp
->attr
.pointer
|| comp
->attr
.allocatable
1392 || comp
->attr
.proc_pointer
|| comp
->ts
.f90_type
== BT_VOID
1393 || (comp
->ts
.type
== BT_CLASS
1394 && (CLASS_DATA (comp
)->attr
.class_pointer
1395 || CLASS_DATA (comp
)->attr
.allocatable
))))
1398 gfc_error ("The NULL in the structure constructor at %L is "
1399 "being applied to component %qs, which is neither "
1400 "a POINTER nor ALLOCATABLE", &cons
->expr
->where
,
1404 if (comp
->attr
.proc_pointer
&& comp
->ts
.interface
)
1406 /* Check procedure pointer interface. */
1407 gfc_symbol
*s2
= NULL
;
1412 c2
= gfc_get_proc_ptr_comp (cons
->expr
);
1415 s2
= c2
->ts
.interface
;
1418 else if (cons
->expr
->expr_type
== EXPR_FUNCTION
)
1420 s2
= cons
->expr
->symtree
->n
.sym
->result
;
1421 name
= cons
->expr
->symtree
->n
.sym
->result
->name
;
1423 else if (cons
->expr
->expr_type
!= EXPR_NULL
)
1425 s2
= cons
->expr
->symtree
->n
.sym
;
1426 name
= cons
->expr
->symtree
->n
.sym
->name
;
1429 if (s2
&& !gfc_compare_interfaces (comp
->ts
.interface
, s2
, name
, 0, 1,
1430 err
, sizeof (err
), NULL
, NULL
))
1432 gfc_error_opt (0, "Interface mismatch for procedure-pointer "
1433 "component %qs in structure constructor at %L:"
1434 " %s", comp
->name
, &cons
->expr
->where
, err
);
1439 if (!comp
->attr
.pointer
|| comp
->attr
.proc_pointer
1440 || cons
->expr
->expr_type
== EXPR_NULL
)
1443 a
= gfc_expr_attr (cons
->expr
);
1445 if (!a
.pointer
&& !a
.target
)
1448 gfc_error ("The element in the structure constructor at %L, "
1449 "for pointer component %qs should be a POINTER or "
1450 "a TARGET", &cons
->expr
->where
, comp
->name
);
1455 /* F08:C461. Additional checks for pointer initialization. */
1459 gfc_error ("Pointer initialization target at %L "
1460 "must not be ALLOCATABLE", &cons
->expr
->where
);
1465 gfc_error ("Pointer initialization target at %L "
1466 "must have the SAVE attribute", &cons
->expr
->where
);
1470 /* F2003, C1272 (3). */
1471 bool impure
= cons
->expr
->expr_type
== EXPR_VARIABLE
1472 && (gfc_impure_variable (cons
->expr
->symtree
->n
.sym
)
1473 || gfc_is_coindexed (cons
->expr
));
1474 if (impure
&& gfc_pure (NULL
))
1477 gfc_error ("Invalid expression in the structure constructor for "
1478 "pointer component %qs at %L in PURE procedure",
1479 comp
->name
, &cons
->expr
->where
);
1483 gfc_unset_implicit_pure (NULL
);
1490 /****************** Expression name resolution ******************/
1492 /* Returns 0 if a symbol was not declared with a type or
1493 attribute declaration statement, nonzero otherwise. */
1496 was_declared (gfc_symbol
*sym
)
1502 if (!a
.implicit_type
&& sym
->ts
.type
!= BT_UNKNOWN
)
1505 if (a
.allocatable
|| a
.dimension
|| a
.dummy
|| a
.external
|| a
.intrinsic
1506 || a
.optional
|| a
.pointer
|| a
.save
|| a
.target
|| a
.volatile_
1507 || a
.value
|| a
.access
!= ACCESS_UNKNOWN
|| a
.intent
!= INTENT_UNKNOWN
1508 || a
.asynchronous
|| a
.codimension
)
1515 /* Determine if a symbol is generic or not. */
1518 generic_sym (gfc_symbol
*sym
)
1522 if (sym
->attr
.generic
||
1523 (sym
->attr
.intrinsic
&& gfc_generic_intrinsic (sym
->name
)))
1526 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1529 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1536 return generic_sym (s
);
1543 /* Determine if a symbol is specific or not. */
1546 specific_sym (gfc_symbol
*sym
)
1550 if (sym
->attr
.if_source
== IFSRC_IFBODY
1551 || sym
->attr
.proc
== PROC_MODULE
1552 || sym
->attr
.proc
== PROC_INTERNAL
1553 || sym
->attr
.proc
== PROC_ST_FUNCTION
1554 || (sym
->attr
.intrinsic
&& gfc_specific_intrinsic (sym
->name
))
1555 || sym
->attr
.external
)
1558 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1561 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1563 return (s
== NULL
) ? 0 : specific_sym (s
);
1567 /* Figure out if the procedure is specific, generic or unknown. */
1570 { PTYPE_GENERIC
= 1, PTYPE_SPECIFIC
, PTYPE_UNKNOWN
};
1573 procedure_kind (gfc_symbol
*sym
)
1575 if (generic_sym (sym
))
1576 return PTYPE_GENERIC
;
1578 if (specific_sym (sym
))
1579 return PTYPE_SPECIFIC
;
1581 return PTYPE_UNKNOWN
;
1584 /* Check references to assumed size arrays. The flag need_full_assumed_size
1585 is nonzero when matching actual arguments. */
1587 static int need_full_assumed_size
= 0;
1590 check_assumed_size_reference (gfc_symbol
*sym
, gfc_expr
*e
)
1592 if (need_full_assumed_size
|| !(sym
->as
&& sym
->as
->type
== AS_ASSUMED_SIZE
))
1595 /* FIXME: The comparison "e->ref->u.ar.type == AR_FULL" is wrong.
1596 What should it be? */
1597 if (e
->ref
&& (e
->ref
->u
.ar
.end
[e
->ref
->u
.ar
.as
->rank
- 1] == NULL
)
1598 && (e
->ref
->u
.ar
.as
->type
== AS_ASSUMED_SIZE
)
1599 && (e
->ref
->u
.ar
.type
== AR_FULL
))
1601 gfc_error ("The upper bound in the last dimension must "
1602 "appear in the reference to the assumed size "
1603 "array %qs at %L", sym
->name
, &e
->where
);
1610 /* Look for bad assumed size array references in argument expressions
1611 of elemental and array valued intrinsic procedures. Since this is
1612 called from procedure resolution functions, it only recurses at
1616 resolve_assumed_size_actual (gfc_expr
*e
)
1621 switch (e
->expr_type
)
1624 if (e
->symtree
&& check_assumed_size_reference (e
->symtree
->n
.sym
, e
))
1629 if (resolve_assumed_size_actual (e
->value
.op
.op1
)
1630 || resolve_assumed_size_actual (e
->value
.op
.op2
))
1641 /* Check a generic procedure, passed as an actual argument, to see if
1642 there is a matching specific name. If none, it is an error, and if
1643 more than one, the reference is ambiguous. */
1645 count_specific_procs (gfc_expr
*e
)
1652 sym
= e
->symtree
->n
.sym
;
1654 for (p
= sym
->generic
; p
; p
= p
->next
)
1655 if (strcmp (sym
->name
, p
->sym
->name
) == 0)
1657 e
->symtree
= gfc_find_symtree (p
->sym
->ns
->sym_root
,
1663 gfc_error ("%qs at %L is ambiguous", e
->symtree
->n
.sym
->name
,
1667 gfc_error ("GENERIC procedure %qs is not allowed as an actual "
1668 "argument at %L", sym
->name
, &e
->where
);
1674 /* See if a call to sym could possibly be a not allowed RECURSION because of
1675 a missing RECURSIVE declaration. This means that either sym is the current
1676 context itself, or sym is the parent of a contained procedure calling its
1677 non-RECURSIVE containing procedure.
1678 This also works if sym is an ENTRY. */
1681 is_illegal_recursion (gfc_symbol
* sym
, gfc_namespace
* context
)
1683 gfc_symbol
* proc_sym
;
1684 gfc_symbol
* context_proc
;
1685 gfc_namespace
* real_context
;
1687 if (sym
->attr
.flavor
== FL_PROGRAM
1688 || gfc_fl_struct (sym
->attr
.flavor
))
1691 /* If we've got an ENTRY, find real procedure. */
1692 if (sym
->attr
.entry
&& sym
->ns
->entries
)
1693 proc_sym
= sym
->ns
->entries
->sym
;
1697 /* If sym is RECURSIVE, all is well of course. */
1698 if (proc_sym
->attr
.recursive
|| flag_recursive
)
1701 /* Find the context procedure's "real" symbol if it has entries.
1702 We look for a procedure symbol, so recurse on the parents if we don't
1703 find one (like in case of a BLOCK construct). */
1704 for (real_context
= context
; ; real_context
= real_context
->parent
)
1706 /* We should find something, eventually! */
1707 gcc_assert (real_context
);
1709 context_proc
= (real_context
->entries
? real_context
->entries
->sym
1710 : real_context
->proc_name
);
1712 /* In some special cases, there may not be a proc_name, like for this
1714 real(bad_kind()) function foo () ...
1715 when checking the call to bad_kind ().
1716 In these cases, we simply return here and assume that the
1721 if (context_proc
->attr
.flavor
!= FL_LABEL
)
1725 /* A call from sym's body to itself is recursion, of course. */
1726 if (context_proc
== proc_sym
)
1729 /* The same is true if context is a contained procedure and sym the
1731 if (context_proc
->attr
.contained
)
1733 gfc_symbol
* parent_proc
;
1735 gcc_assert (context
->parent
);
1736 parent_proc
= (context
->parent
->entries
? context
->parent
->entries
->sym
1737 : context
->parent
->proc_name
);
1739 if (parent_proc
== proc_sym
)
1747 /* Resolve an intrinsic procedure: Set its function/subroutine attribute,
1748 its typespec and formal argument list. */
1751 gfc_resolve_intrinsic (gfc_symbol
*sym
, locus
*loc
)
1753 gfc_intrinsic_sym
* isym
= NULL
;
1759 /* Already resolved. */
1760 if (sym
->from_intmod
&& sym
->ts
.type
!= BT_UNKNOWN
)
1763 /* We already know this one is an intrinsic, so we don't call
1764 gfc_is_intrinsic for full checking but rather use gfc_find_function and
1765 gfc_find_subroutine directly to check whether it is a function or
1768 if (sym
->intmod_sym_id
&& sym
->attr
.subroutine
)
1770 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1771 isym
= gfc_intrinsic_subroutine_by_id (id
);
1773 else if (sym
->intmod_sym_id
)
1775 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1776 isym
= gfc_intrinsic_function_by_id (id
);
1778 else if (!sym
->attr
.subroutine
)
1779 isym
= gfc_find_function (sym
->name
);
1781 if (isym
&& !sym
->attr
.subroutine
)
1783 if (sym
->ts
.type
!= BT_UNKNOWN
&& warn_surprising
1784 && !sym
->attr
.implicit_type
)
1785 gfc_warning (OPT_Wsurprising
,
1786 "Type specified for intrinsic function %qs at %L is"
1787 " ignored", sym
->name
, &sym
->declared_at
);
1789 if (!sym
->attr
.function
&&
1790 !gfc_add_function(&sym
->attr
, sym
->name
, loc
))
1795 else if (isym
|| (isym
= gfc_find_subroutine (sym
->name
)))
1797 if (sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.implicit_type
)
1799 gfc_error ("Intrinsic subroutine %qs at %L shall not have a type"
1800 " specifier", sym
->name
, &sym
->declared_at
);
1804 if (!sym
->attr
.subroutine
&&
1805 !gfc_add_subroutine(&sym
->attr
, sym
->name
, loc
))
1810 gfc_error ("%qs declared INTRINSIC at %L does not exist", sym
->name
,
1815 gfc_copy_formal_args_intr (sym
, isym
, NULL
);
1817 sym
->attr
.pure
= isym
->pure
;
1818 sym
->attr
.elemental
= isym
->elemental
;
1820 /* Check it is actually available in the standard settings. */
1821 if (!gfc_check_intrinsic_standard (isym
, &symstd
, false, sym
->declared_at
))
1823 gfc_error ("The intrinsic %qs declared INTRINSIC at %L is not "
1824 "available in the current standard settings but %s. Use "
1825 "an appropriate %<-std=*%> option or enable "
1826 "%<-fall-intrinsics%> in order to use it.",
1827 sym
->name
, &sym
->declared_at
, symstd
);
1835 /* Resolve a procedure expression, like passing it to a called procedure or as
1836 RHS for a procedure pointer assignment. */
1839 resolve_procedure_expression (gfc_expr
* expr
)
1843 if (expr
->expr_type
!= EXPR_VARIABLE
)
1845 gcc_assert (expr
->symtree
);
1847 sym
= expr
->symtree
->n
.sym
;
1849 if (sym
->attr
.intrinsic
)
1850 gfc_resolve_intrinsic (sym
, &expr
->where
);
1852 if (sym
->attr
.flavor
!= FL_PROCEDURE
1853 || (sym
->attr
.function
&& sym
->result
== sym
))
1856 /* A non-RECURSIVE procedure that is used as procedure expression within its
1857 own body is in danger of being called recursively. */
1858 if (is_illegal_recursion (sym
, gfc_current_ns
))
1859 gfc_warning (0, "Non-RECURSIVE procedure %qs at %L is possibly calling"
1860 " itself recursively. Declare it RECURSIVE or use"
1861 " %<-frecursive%>", sym
->name
, &expr
->where
);
1867 /* Check that name is not a derived type. */
1870 is_dt_name (const char *name
)
1872 gfc_symbol
*dt_list
, *dt_first
;
1874 dt_list
= dt_first
= gfc_derived_types
;
1875 for (; dt_list
; dt_list
= dt_list
->dt_next
)
1877 if (strcmp(dt_list
->name
, name
) == 0)
1879 if (dt_first
== dt_list
->dt_next
)
1886 /* Resolve an actual argument list. Most of the time, this is just
1887 resolving the expressions in the list.
1888 The exception is that we sometimes have to decide whether arguments
1889 that look like procedure arguments are really simple variable
1893 resolve_actual_arglist (gfc_actual_arglist
*arg
, procedure_type ptype
,
1894 bool no_formal_args
)
1897 gfc_symtree
*parent_st
;
1899 gfc_component
*comp
;
1900 int save_need_full_assumed_size
;
1901 bool return_value
= false;
1902 bool actual_arg_sav
= actual_arg
, first_actual_arg_sav
= first_actual_arg
;
1905 first_actual_arg
= true;
1907 for (; arg
; arg
= arg
->next
)
1912 /* Check the label is a valid branching target. */
1915 if (arg
->label
->defined
== ST_LABEL_UNKNOWN
)
1917 gfc_error ("Label %d referenced at %L is never defined",
1918 arg
->label
->value
, &arg
->label
->where
);
1922 first_actual_arg
= false;
1926 if (e
->expr_type
== EXPR_VARIABLE
1927 && e
->symtree
->n
.sym
->attr
.generic
1929 && count_specific_procs (e
) != 1)
1932 if (e
->ts
.type
!= BT_PROCEDURE
)
1934 save_need_full_assumed_size
= need_full_assumed_size
;
1935 if (e
->expr_type
!= EXPR_VARIABLE
)
1936 need_full_assumed_size
= 0;
1937 if (!gfc_resolve_expr (e
))
1939 need_full_assumed_size
= save_need_full_assumed_size
;
1943 /* See if the expression node should really be a variable reference. */
1945 sym
= e
->symtree
->n
.sym
;
1947 if (sym
->attr
.flavor
== FL_PROCEDURE
&& is_dt_name (sym
->name
))
1949 gfc_error ("Derived type %qs is used as an actual "
1950 "argument at %L", sym
->name
, &e
->where
);
1954 if (sym
->attr
.flavor
== FL_PROCEDURE
1955 || sym
->attr
.intrinsic
1956 || sym
->attr
.external
)
1960 /* If a procedure is not already determined to be something else
1961 check if it is intrinsic. */
1962 if (gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, e
->where
))
1963 sym
->attr
.intrinsic
= 1;
1965 if (sym
->attr
.proc
== PROC_ST_FUNCTION
)
1967 gfc_error ("Statement function %qs at %L is not allowed as an "
1968 "actual argument", sym
->name
, &e
->where
);
1971 actual_ok
= gfc_intrinsic_actual_ok (sym
->name
,
1972 sym
->attr
.subroutine
);
1973 if (sym
->attr
.intrinsic
&& actual_ok
== 0)
1975 gfc_error ("Intrinsic %qs at %L is not allowed as an "
1976 "actual argument", sym
->name
, &e
->where
);
1979 if (sym
->attr
.contained
&& !sym
->attr
.use_assoc
1980 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
1982 if (!gfc_notify_std (GFC_STD_F2008
, "Internal procedure %qs is"
1983 " used as actual argument at %L",
1984 sym
->name
, &e
->where
))
1988 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
)
1990 gfc_error ("ELEMENTAL non-INTRINSIC procedure %qs is not "
1991 "allowed as an actual argument at %L", sym
->name
,
1995 /* Check if a generic interface has a specific procedure
1996 with the same name before emitting an error. */
1997 if (sym
->attr
.generic
&& count_specific_procs (e
) != 1)
2000 /* Just in case a specific was found for the expression. */
2001 sym
= e
->symtree
->n
.sym
;
2003 /* If the symbol is the function that names the current (or
2004 parent) scope, then we really have a variable reference. */
2006 if (gfc_is_function_return_value (sym
, sym
->ns
))
2009 /* If all else fails, see if we have a specific intrinsic. */
2010 if (sym
->ts
.type
== BT_UNKNOWN
&& sym
->attr
.intrinsic
)
2012 gfc_intrinsic_sym
*isym
;
2014 isym
= gfc_find_function (sym
->name
);
2015 if (isym
== NULL
|| !isym
->specific
)
2017 gfc_error ("Unable to find a specific INTRINSIC procedure "
2018 "for the reference %qs at %L", sym
->name
,
2023 sym
->attr
.intrinsic
= 1;
2024 sym
->attr
.function
= 1;
2027 if (!gfc_resolve_expr (e
))
2032 /* See if the name is a module procedure in a parent unit. */
2034 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
2037 if (gfc_find_sym_tree (sym
->name
, sym
->ns
->parent
, 1, &parent_st
))
2039 gfc_error ("Symbol %qs at %L is ambiguous", sym
->name
, &e
->where
);
2043 if (parent_st
== NULL
)
2046 sym
= parent_st
->n
.sym
;
2047 e
->symtree
= parent_st
; /* Point to the right thing. */
2049 if (sym
->attr
.flavor
== FL_PROCEDURE
2050 || sym
->attr
.intrinsic
2051 || sym
->attr
.external
)
2053 if (!gfc_resolve_expr (e
))
2059 e
->expr_type
= EXPR_VARIABLE
;
2061 if ((sym
->as
!= NULL
&& sym
->ts
.type
!= BT_CLASS
)
2062 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
2063 && CLASS_DATA (sym
)->as
))
2065 e
->rank
= sym
->ts
.type
== BT_CLASS
2066 ? CLASS_DATA (sym
)->as
->rank
: sym
->as
->rank
;
2067 e
->ref
= gfc_get_ref ();
2068 e
->ref
->type
= REF_ARRAY
;
2069 e
->ref
->u
.ar
.type
= AR_FULL
;
2070 e
->ref
->u
.ar
.as
= sym
->ts
.type
== BT_CLASS
2071 ? CLASS_DATA (sym
)->as
: sym
->as
;
2074 /* Expressions are assigned a default ts.type of BT_PROCEDURE in
2075 primary.c (match_actual_arg). If above code determines that it
2076 is a variable instead, it needs to be resolved as it was not
2077 done at the beginning of this function. */
2078 save_need_full_assumed_size
= need_full_assumed_size
;
2079 if (e
->expr_type
!= EXPR_VARIABLE
)
2080 need_full_assumed_size
= 0;
2081 if (!gfc_resolve_expr (e
))
2083 need_full_assumed_size
= save_need_full_assumed_size
;
2086 /* Check argument list functions %VAL, %LOC and %REF. There is
2087 nothing to do for %REF. */
2088 if (arg
->name
&& arg
->name
[0] == '%')
2090 if (strcmp ("%VAL", arg
->name
) == 0)
2092 if (e
->ts
.type
== BT_CHARACTER
|| e
->ts
.type
== BT_DERIVED
)
2094 gfc_error ("By-value argument at %L is not of numeric "
2101 gfc_error ("By-value argument at %L cannot be an array or "
2102 "an array section", &e
->where
);
2106 /* Intrinsics are still PROC_UNKNOWN here. However,
2107 since same file external procedures are not resolvable
2108 in gfortran, it is a good deal easier to leave them to
2110 if (ptype
!= PROC_UNKNOWN
2111 && ptype
!= PROC_DUMMY
2112 && ptype
!= PROC_EXTERNAL
2113 && ptype
!= PROC_MODULE
)
2115 gfc_error ("By-value argument at %L is not allowed "
2116 "in this context", &e
->where
);
2121 /* Statement functions have already been excluded above. */
2122 else if (strcmp ("%LOC", arg
->name
) == 0
2123 && e
->ts
.type
== BT_PROCEDURE
)
2125 if (e
->symtree
->n
.sym
->attr
.proc
== PROC_INTERNAL
)
2127 gfc_error ("Passing internal procedure at %L by location "
2128 "not allowed", &e
->where
);
2134 comp
= gfc_get_proc_ptr_comp(e
);
2135 if (e
->expr_type
== EXPR_VARIABLE
2136 && comp
&& comp
->attr
.elemental
)
2138 gfc_error ("ELEMENTAL procedure pointer component %qs is not "
2139 "allowed as an actual argument at %L", comp
->name
,
2143 /* Fortran 2008, C1237. */
2144 if (e
->expr_type
== EXPR_VARIABLE
&& gfc_is_coindexed (e
)
2145 && gfc_has_ultimate_pointer (e
))
2147 gfc_error ("Coindexed actual argument at %L with ultimate pointer "
2148 "component", &e
->where
);
2152 first_actual_arg
= false;
2155 return_value
= true;
2158 actual_arg
= actual_arg_sav
;
2159 first_actual_arg
= first_actual_arg_sav
;
2161 return return_value
;
2165 /* Do the checks of the actual argument list that are specific to elemental
2166 procedures. If called with c == NULL, we have a function, otherwise if
2167 expr == NULL, we have a subroutine. */
2170 resolve_elemental_actual (gfc_expr
*expr
, gfc_code
*c
)
2172 gfc_actual_arglist
*arg0
;
2173 gfc_actual_arglist
*arg
;
2174 gfc_symbol
*esym
= NULL
;
2175 gfc_intrinsic_sym
*isym
= NULL
;
2177 gfc_intrinsic_arg
*iformal
= NULL
;
2178 gfc_formal_arglist
*eformal
= NULL
;
2179 bool formal_optional
= false;
2180 bool set_by_optional
= false;
2184 /* Is this an elemental procedure? */
2185 if (expr
&& expr
->value
.function
.actual
!= NULL
)
2187 if (expr
->value
.function
.esym
!= NULL
2188 && expr
->value
.function
.esym
->attr
.elemental
)
2190 arg0
= expr
->value
.function
.actual
;
2191 esym
= expr
->value
.function
.esym
;
2193 else if (expr
->value
.function
.isym
!= NULL
2194 && expr
->value
.function
.isym
->elemental
)
2196 arg0
= expr
->value
.function
.actual
;
2197 isym
= expr
->value
.function
.isym
;
2202 else if (c
&& c
->ext
.actual
!= NULL
)
2204 arg0
= c
->ext
.actual
;
2206 if (c
->resolved_sym
)
2207 esym
= c
->resolved_sym
;
2209 esym
= c
->symtree
->n
.sym
;
2212 if (!esym
->attr
.elemental
)
2218 /* The rank of an elemental is the rank of its array argument(s). */
2219 for (arg
= arg0
; arg
; arg
= arg
->next
)
2221 if (arg
->expr
!= NULL
&& arg
->expr
->rank
!= 0)
2223 rank
= arg
->expr
->rank
;
2224 if (arg
->expr
->expr_type
== EXPR_VARIABLE
2225 && arg
->expr
->symtree
->n
.sym
->attr
.optional
)
2226 set_by_optional
= true;
2228 /* Function specific; set the result rank and shape. */
2232 if (!expr
->shape
&& arg
->expr
->shape
)
2234 expr
->shape
= gfc_get_shape (rank
);
2235 for (i
= 0; i
< rank
; i
++)
2236 mpz_init_set (expr
->shape
[i
], arg
->expr
->shape
[i
]);
2243 /* If it is an array, it shall not be supplied as an actual argument
2244 to an elemental procedure unless an array of the same rank is supplied
2245 as an actual argument corresponding to a nonoptional dummy argument of
2246 that elemental procedure(12.4.1.5). */
2247 formal_optional
= false;
2249 iformal
= isym
->formal
;
2251 eformal
= esym
->formal
;
2253 for (arg
= arg0
; arg
; arg
= arg
->next
)
2257 if (eformal
->sym
&& eformal
->sym
->attr
.optional
)
2258 formal_optional
= true;
2259 eformal
= eformal
->next
;
2261 else if (isym
&& iformal
)
2263 if (iformal
->optional
)
2264 formal_optional
= true;
2265 iformal
= iformal
->next
;
2268 formal_optional
= true;
2270 if (pedantic
&& arg
->expr
!= NULL
2271 && arg
->expr
->expr_type
== EXPR_VARIABLE
2272 && arg
->expr
->symtree
->n
.sym
->attr
.optional
2275 && (set_by_optional
|| arg
->expr
->rank
!= rank
)
2276 && !(isym
&& isym
->id
== GFC_ISYM_CONVERSION
))
2278 gfc_warning (OPT_Wpedantic
,
2279 "%qs at %L is an array and OPTIONAL; IF IT IS "
2280 "MISSING, it cannot be the actual argument of an "
2281 "ELEMENTAL procedure unless there is a non-optional "
2282 "argument with the same rank (12.4.1.5)",
2283 arg
->expr
->symtree
->n
.sym
->name
, &arg
->expr
->where
);
2287 for (arg
= arg0
; arg
; arg
= arg
->next
)
2289 if (arg
->expr
== NULL
|| arg
->expr
->rank
== 0)
2292 /* Being elemental, the last upper bound of an assumed size array
2293 argument must be present. */
2294 if (resolve_assumed_size_actual (arg
->expr
))
2297 /* Elemental procedure's array actual arguments must conform. */
2300 if (!gfc_check_conformance (arg
->expr
, e
, "elemental procedure"))
2307 /* INTENT(OUT) is only allowed for subroutines; if any actual argument
2308 is an array, the intent inout/out variable needs to be also an array. */
2309 if (rank
> 0 && esym
&& expr
== NULL
)
2310 for (eformal
= esym
->formal
, arg
= arg0
; arg
&& eformal
;
2311 arg
= arg
->next
, eformal
= eformal
->next
)
2312 if ((eformal
->sym
->attr
.intent
== INTENT_OUT
2313 || eformal
->sym
->attr
.intent
== INTENT_INOUT
)
2314 && arg
->expr
&& arg
->expr
->rank
== 0)
2316 gfc_error ("Actual argument at %L for INTENT(%s) dummy %qs of "
2317 "ELEMENTAL subroutine %qs is a scalar, but another "
2318 "actual argument is an array", &arg
->expr
->where
,
2319 (eformal
->sym
->attr
.intent
== INTENT_OUT
) ? "OUT"
2320 : "INOUT", eformal
->sym
->name
, esym
->name
);
2327 /* This function does the checking of references to global procedures
2328 as defined in sections 18.1 and 14.1, respectively, of the Fortran
2329 77 and 95 standards. It checks for a gsymbol for the name, making
2330 one if it does not already exist. If it already exists, then the
2331 reference being resolved must correspond to the type of gsymbol.
2332 Otherwise, the new symbol is equipped with the attributes of the
2333 reference. The corresponding code that is called in creating
2334 global entities is parse.c.
2336 In addition, for all but -std=legacy, the gsymbols are used to
2337 check the interfaces of external procedures from the same file.
2338 The namespace of the gsymbol is resolved and then, once this is
2339 done the interface is checked. */
2343 not_in_recursive (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2345 if (!gsym_ns
->proc_name
->attr
.recursive
)
2348 if (sym
->ns
== gsym_ns
)
2351 if (sym
->ns
->parent
&& sym
->ns
->parent
== gsym_ns
)
2358 not_entry_self_reference (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2360 if (gsym_ns
->entries
)
2362 gfc_entry_list
*entry
= gsym_ns
->entries
;
2364 for (; entry
; entry
= entry
->next
)
2366 if (strcmp (sym
->name
, entry
->sym
->name
) == 0)
2368 if (strcmp (gsym_ns
->proc_name
->name
,
2369 sym
->ns
->proc_name
->name
) == 0)
2373 && strcmp (gsym_ns
->proc_name
->name
,
2374 sym
->ns
->parent
->proc_name
->name
) == 0)
2383 /* Check for the requirement of an explicit interface. F08:12.4.2.2. */
2386 gfc_explicit_interface_required (gfc_symbol
*sym
, char *errmsg
, int err_len
)
2388 gfc_formal_arglist
*arg
= gfc_sym_get_dummy_args (sym
);
2390 for ( ; arg
; arg
= arg
->next
)
2395 if (arg
->sym
->attr
.allocatable
) /* (2a) */
2397 strncpy (errmsg
, _("allocatable argument"), err_len
);
2400 else if (arg
->sym
->attr
.asynchronous
)
2402 strncpy (errmsg
, _("asynchronous argument"), err_len
);
2405 else if (arg
->sym
->attr
.optional
)
2407 strncpy (errmsg
, _("optional argument"), err_len
);
2410 else if (arg
->sym
->attr
.pointer
)
2412 strncpy (errmsg
, _("pointer argument"), err_len
);
2415 else if (arg
->sym
->attr
.target
)
2417 strncpy (errmsg
, _("target argument"), err_len
);
2420 else if (arg
->sym
->attr
.value
)
2422 strncpy (errmsg
, _("value argument"), err_len
);
2425 else if (arg
->sym
->attr
.volatile_
)
2427 strncpy (errmsg
, _("volatile argument"), err_len
);
2430 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_SHAPE
) /* (2b) */
2432 strncpy (errmsg
, _("assumed-shape argument"), err_len
);
2435 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_RANK
) /* TS 29113, 6.2. */
2437 strncpy (errmsg
, _("assumed-rank argument"), err_len
);
2440 else if (arg
->sym
->attr
.codimension
) /* (2c) */
2442 strncpy (errmsg
, _("coarray argument"), err_len
);
2445 else if (false) /* (2d) TODO: parametrized derived type */
2447 strncpy (errmsg
, _("parametrized derived type argument"), err_len
);
2450 else if (arg
->sym
->ts
.type
== BT_CLASS
) /* (2e) */
2452 strncpy (errmsg
, _("polymorphic argument"), err_len
);
2455 else if (arg
->sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
2457 strncpy (errmsg
, _("NO_ARG_CHECK attribute"), err_len
);
2460 else if (arg
->sym
->ts
.type
== BT_ASSUMED
)
2462 /* As assumed-type is unlimited polymorphic (cf. above).
2463 See also TS 29113, Note 6.1. */
2464 strncpy (errmsg
, _("assumed-type argument"), err_len
);
2469 if (sym
->attr
.function
)
2471 gfc_symbol
*res
= sym
->result
? sym
->result
: sym
;
2473 if (res
->attr
.dimension
) /* (3a) */
2475 strncpy (errmsg
, _("array result"), err_len
);
2478 else if (res
->attr
.pointer
|| res
->attr
.allocatable
) /* (3b) */
2480 strncpy (errmsg
, _("pointer or allocatable result"), err_len
);
2483 else if (res
->ts
.type
== BT_CHARACTER
&& res
->ts
.u
.cl
2484 && res
->ts
.u
.cl
->length
2485 && res
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
) /* (3c) */
2487 strncpy (errmsg
, _("result with non-constant character length"), err_len
);
2492 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
) /* (4) */
2494 strncpy (errmsg
, _("elemental procedure"), err_len
);
2497 else if (sym
->attr
.is_bind_c
) /* (5) */
2499 strncpy (errmsg
, _("bind(c) procedure"), err_len
);
2508 resolve_global_procedure (gfc_symbol
*sym
, locus
*where
, int sub
)
2512 enum gfc_symbol_type type
;
2515 type
= sub
? GSYM_SUBROUTINE
: GSYM_FUNCTION
;
2517 gsym
= gfc_get_gsymbol (sym
->binding_label
? sym
->binding_label
: sym
->name
,
2518 sym
->binding_label
!= NULL
);
2520 if ((gsym
->type
!= GSYM_UNKNOWN
&& gsym
->type
!= type
))
2521 gfc_global_used (gsym
, where
);
2523 if ((sym
->attr
.if_source
== IFSRC_UNKNOWN
2524 || sym
->attr
.if_source
== IFSRC_IFBODY
)
2525 && gsym
->type
!= GSYM_UNKNOWN
2526 && !gsym
->binding_label
2528 && gsym
->ns
->proc_name
2529 && not_in_recursive (sym
, gsym
->ns
)
2530 && not_entry_self_reference (sym
, gsym
->ns
))
2532 gfc_symbol
*def_sym
;
2533 def_sym
= gsym
->ns
->proc_name
;
2535 if (gsym
->ns
->resolved
!= -1)
2538 /* Resolve the gsymbol namespace if needed. */
2539 if (!gsym
->ns
->resolved
)
2541 gfc_symbol
*old_dt_list
;
2543 /* Stash away derived types so that the backend_decls
2544 do not get mixed up. */
2545 old_dt_list
= gfc_derived_types
;
2546 gfc_derived_types
= NULL
;
2548 gfc_resolve (gsym
->ns
);
2550 /* Store the new derived types with the global namespace. */
2551 if (gfc_derived_types
)
2552 gsym
->ns
->derived_types
= gfc_derived_types
;
2554 /* Restore the derived types of this namespace. */
2555 gfc_derived_types
= old_dt_list
;
2558 /* Make sure that translation for the gsymbol occurs before
2559 the procedure currently being resolved. */
2560 ns
= gfc_global_ns_list
;
2561 for (; ns
&& ns
!= gsym
->ns
; ns
= ns
->sibling
)
2563 if (ns
->sibling
== gsym
->ns
)
2565 ns
->sibling
= gsym
->ns
->sibling
;
2566 gsym
->ns
->sibling
= gfc_global_ns_list
;
2567 gfc_global_ns_list
= gsym
->ns
;
2572 /* This can happen if a binding name has been specified. */
2573 if (gsym
->binding_label
&& gsym
->sym_name
!= def_sym
->name
)
2574 gfc_find_symbol (gsym
->sym_name
, gsym
->ns
, 0, &def_sym
);
2576 if (def_sym
->attr
.entry_master
|| def_sym
->attr
.entry
)
2578 gfc_entry_list
*entry
;
2579 for (entry
= gsym
->ns
->entries
; entry
; entry
= entry
->next
)
2580 if (strcmp (entry
->sym
->name
, sym
->name
) == 0)
2582 def_sym
= entry
->sym
;
2588 if (sym
->attr
.function
&& !gfc_compare_types (&sym
->ts
, &def_sym
->ts
))
2590 gfc_error ("Return type mismatch of function %qs at %L (%s/%s)",
2591 sym
->name
, &sym
->declared_at
, gfc_typename (&sym
->ts
),
2592 gfc_typename (&def_sym
->ts
));
2596 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
2597 && gfc_explicit_interface_required (def_sym
, reason
, sizeof(reason
)))
2599 gfc_error ("Explicit interface required for %qs at %L: %s",
2600 sym
->name
, &sym
->declared_at
, reason
);
2604 if (!pedantic
&& (gfc_option
.allow_std
& GFC_STD_GNU
))
2605 /* Turn erros into warnings with -std=gnu and -std=legacy. */
2606 gfc_errors_to_warnings (true);
2608 if (!gfc_compare_interfaces (sym
, def_sym
, sym
->name
, 0, 1,
2609 reason
, sizeof(reason
), NULL
, NULL
))
2611 gfc_error_opt (0, "Interface mismatch in global procedure %qs at %L:"
2612 " %s", sym
->name
, &sym
->declared_at
, reason
);
2618 gfc_errors_to_warnings (false);
2620 if (gsym
->type
== GSYM_UNKNOWN
)
2623 gsym
->where
= *where
;
2630 /************* Function resolution *************/
2632 /* Resolve a function call known to be generic.
2633 Section 14.1.2.4.1. */
2636 resolve_generic_f0 (gfc_expr
*expr
, gfc_symbol
*sym
)
2640 if (sym
->attr
.generic
)
2642 s
= gfc_search_interface (sym
->generic
, 0, &expr
->value
.function
.actual
);
2645 expr
->value
.function
.name
= s
->name
;
2646 expr
->value
.function
.esym
= s
;
2648 if (s
->ts
.type
!= BT_UNKNOWN
)
2650 else if (s
->result
!= NULL
&& s
->result
->ts
.type
!= BT_UNKNOWN
)
2651 expr
->ts
= s
->result
->ts
;
2654 expr
->rank
= s
->as
->rank
;
2655 else if (s
->result
!= NULL
&& s
->result
->as
!= NULL
)
2656 expr
->rank
= s
->result
->as
->rank
;
2658 gfc_set_sym_referenced (expr
->value
.function
.esym
);
2663 /* TODO: Need to search for elemental references in generic
2667 if (sym
->attr
.intrinsic
)
2668 return gfc_intrinsic_func_interface (expr
, 0);
2675 resolve_generic_f (gfc_expr
*expr
)
2679 gfc_interface
*intr
= NULL
;
2681 sym
= expr
->symtree
->n
.sym
;
2685 m
= resolve_generic_f0 (expr
, sym
);
2688 else if (m
== MATCH_ERROR
)
2693 for (intr
= sym
->generic
; intr
; intr
= intr
->next
)
2694 if (gfc_fl_struct (intr
->sym
->attr
.flavor
))
2697 if (sym
->ns
->parent
== NULL
)
2699 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2703 if (!generic_sym (sym
))
2707 /* Last ditch attempt. See if the reference is to an intrinsic
2708 that possesses a matching interface. 14.1.2.4 */
2709 if (sym
&& !intr
&& !gfc_is_intrinsic (sym
, 0, expr
->where
))
2711 if (gfc_init_expr_flag
)
2712 gfc_error ("Function %qs in initialization expression at %L "
2713 "must be an intrinsic function",
2714 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2716 gfc_error ("There is no specific function for the generic %qs "
2717 "at %L", expr
->symtree
->n
.sym
->name
, &expr
->where
);
2723 if (!gfc_convert_to_structure_constructor (expr
, intr
->sym
, NULL
,
2726 if (!gfc_use_derived (expr
->ts
.u
.derived
))
2728 return resolve_structure_cons (expr
, 0);
2731 m
= gfc_intrinsic_func_interface (expr
, 0);
2736 gfc_error ("Generic function %qs at %L is not consistent with a "
2737 "specific intrinsic interface", expr
->symtree
->n
.sym
->name
,
2744 /* Resolve a function call known to be specific. */
2747 resolve_specific_f0 (gfc_symbol
*sym
, gfc_expr
*expr
)
2751 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
2753 if (sym
->attr
.dummy
)
2755 sym
->attr
.proc
= PROC_DUMMY
;
2759 sym
->attr
.proc
= PROC_EXTERNAL
;
2763 if (sym
->attr
.proc
== PROC_MODULE
2764 || sym
->attr
.proc
== PROC_ST_FUNCTION
2765 || sym
->attr
.proc
== PROC_INTERNAL
)
2768 if (sym
->attr
.intrinsic
)
2770 m
= gfc_intrinsic_func_interface (expr
, 1);
2774 gfc_error ("Function %qs at %L is INTRINSIC but is not compatible "
2775 "with an intrinsic", sym
->name
, &expr
->where
);
2783 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2786 expr
->ts
= sym
->result
->ts
;
2789 expr
->value
.function
.name
= sym
->name
;
2790 expr
->value
.function
.esym
= sym
;
2791 /* Prevent crash when sym->ts.u.derived->components is not set due to previous
2793 if (sym
->ts
.type
== BT_CLASS
&& !CLASS_DATA (sym
))
2795 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)
2796 expr
->rank
= CLASS_DATA (sym
)->as
->rank
;
2797 else if (sym
->as
!= NULL
)
2798 expr
->rank
= sym
->as
->rank
;
2805 resolve_specific_f (gfc_expr
*expr
)
2810 sym
= expr
->symtree
->n
.sym
;
2814 m
= resolve_specific_f0 (sym
, expr
);
2817 if (m
== MATCH_ERROR
)
2820 if (sym
->ns
->parent
== NULL
)
2823 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2829 gfc_error ("Unable to resolve the specific function %qs at %L",
2830 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2835 /* Recursively append candidate SYM to CANDIDATES. Store the number of
2836 candidates in CANDIDATES_LEN. */
2839 lookup_function_fuzzy_find_candidates (gfc_symtree
*sym
,
2841 size_t &candidates_len
)
2847 if ((sym
->n
.sym
->ts
.type
!= BT_UNKNOWN
|| sym
->n
.sym
->attr
.external
)
2848 && sym
->n
.sym
->attr
.flavor
== FL_PROCEDURE
)
2849 vec_push (candidates
, candidates_len
, sym
->name
);
2853 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2857 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2861 /* Lookup function FN fuzzily, taking names in SYMROOT into account. */
2864 gfc_lookup_function_fuzzy (const char *fn
, gfc_symtree
*symroot
)
2866 char **candidates
= NULL
;
2867 size_t candidates_len
= 0;
2868 lookup_function_fuzzy_find_candidates (symroot
, candidates
, candidates_len
);
2869 return gfc_closest_fuzzy_match (fn
, candidates
);
2873 /* Resolve a procedure call not known to be generic nor specific. */
2876 resolve_unknown_f (gfc_expr
*expr
)
2881 sym
= expr
->symtree
->n
.sym
;
2883 if (sym
->attr
.dummy
)
2885 sym
->attr
.proc
= PROC_DUMMY
;
2886 expr
->value
.function
.name
= sym
->name
;
2890 /* See if we have an intrinsic function reference. */
2892 if (gfc_is_intrinsic (sym
, 0, expr
->where
))
2894 if (gfc_intrinsic_func_interface (expr
, 1) == MATCH_YES
)
2899 /* The reference is to an external name. */
2901 sym
->attr
.proc
= PROC_EXTERNAL
;
2902 expr
->value
.function
.name
= sym
->name
;
2903 expr
->value
.function
.esym
= expr
->symtree
->n
.sym
;
2905 if (sym
->as
!= NULL
)
2906 expr
->rank
= sym
->as
->rank
;
2908 /* Type of the expression is either the type of the symbol or the
2909 default type of the symbol. */
2912 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2914 if (sym
->ts
.type
!= BT_UNKNOWN
)
2918 ts
= gfc_get_default_type (sym
->name
, sym
->ns
);
2920 if (ts
->type
== BT_UNKNOWN
)
2923 = gfc_lookup_function_fuzzy (sym
->name
, sym
->ns
->sym_root
);
2925 gfc_error ("Function %qs at %L has no IMPLICIT type"
2926 "; did you mean %qs?",
2927 sym
->name
, &expr
->where
, guessed
);
2929 gfc_error ("Function %qs at %L has no IMPLICIT type",
2930 sym
->name
, &expr
->where
);
2941 /* Return true, if the symbol is an external procedure. */
2943 is_external_proc (gfc_symbol
*sym
)
2945 if (!sym
->attr
.dummy
&& !sym
->attr
.contained
2946 && !gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, sym
->declared_at
)
2947 && sym
->attr
.proc
!= PROC_ST_FUNCTION
2948 && !sym
->attr
.proc_pointer
2949 && !sym
->attr
.use_assoc
2957 /* Figure out if a function reference is pure or not. Also set the name
2958 of the function for a potential error message. Return nonzero if the
2959 function is PURE, zero if not. */
2961 pure_stmt_function (gfc_expr
*, gfc_symbol
*);
2964 gfc_pure_function (gfc_expr
*e
, const char **name
)
2967 gfc_component
*comp
;
2971 if (e
->symtree
!= NULL
2972 && e
->symtree
->n
.sym
!= NULL
2973 && e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
2974 return pure_stmt_function (e
, e
->symtree
->n
.sym
);
2976 comp
= gfc_get_proc_ptr_comp (e
);
2979 pure
= gfc_pure (comp
->ts
.interface
);
2982 else if (e
->value
.function
.esym
)
2984 pure
= gfc_pure (e
->value
.function
.esym
);
2985 *name
= e
->value
.function
.esym
->name
;
2987 else if (e
->value
.function
.isym
)
2989 pure
= e
->value
.function
.isym
->pure
2990 || e
->value
.function
.isym
->elemental
;
2991 *name
= e
->value
.function
.isym
->name
;
2995 /* Implicit functions are not pure. */
2997 *name
= e
->value
.function
.name
;
3004 /* Check if the expression is a reference to an implicitly pure function. */
3007 gfc_implicit_pure_function (gfc_expr
*e
)
3009 gfc_component
*comp
= gfc_get_proc_ptr_comp (e
);
3011 return gfc_implicit_pure (comp
->ts
.interface
);
3012 else if (e
->value
.function
.esym
)
3013 return gfc_implicit_pure (e
->value
.function
.esym
);
3020 impure_stmt_fcn (gfc_expr
*e
, gfc_symbol
*sym
,
3021 int *f ATTRIBUTE_UNUSED
)
3025 /* Don't bother recursing into other statement functions
3026 since they will be checked individually for purity. */
3027 if (e
->expr_type
!= EXPR_FUNCTION
3029 || e
->symtree
->n
.sym
== sym
3030 || e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
3033 return gfc_pure_function (e
, &name
) ? false : true;
3038 pure_stmt_function (gfc_expr
*e
, gfc_symbol
*sym
)
3040 return gfc_traverse_expr (e
, sym
, impure_stmt_fcn
, 0) ? 0 : 1;
3044 /* Check if an impure function is allowed in the current context. */
3046 static bool check_pure_function (gfc_expr
*e
)
3048 const char *name
= NULL
;
3049 if (!gfc_pure_function (e
, &name
) && name
)
3053 gfc_error ("Reference to impure function %qs at %L inside a "
3054 "FORALL %s", name
, &e
->where
,
3055 forall_flag
== 2 ? "mask" : "block");
3058 else if (gfc_do_concurrent_flag
)
3060 gfc_error ("Reference to impure function %qs at %L inside a "
3061 "DO CONCURRENT %s", name
, &e
->where
,
3062 gfc_do_concurrent_flag
== 2 ? "mask" : "block");
3065 else if (gfc_pure (NULL
))
3067 gfc_error ("Reference to impure function %qs at %L "
3068 "within a PURE procedure", name
, &e
->where
);
3071 if (!gfc_implicit_pure_function (e
))
3072 gfc_unset_implicit_pure (NULL
);
3078 /* Update current procedure's array_outer_dependency flag, considering
3079 a call to procedure SYM. */
3082 update_current_proc_array_outer_dependency (gfc_symbol
*sym
)
3084 /* Check to see if this is a sibling function that has not yet
3086 gfc_namespace
*sibling
= gfc_current_ns
->sibling
;
3087 for (; sibling
; sibling
= sibling
->sibling
)
3089 if (sibling
->proc_name
== sym
)
3091 gfc_resolve (sibling
);
3096 /* If SYM has references to outer arrays, so has the procedure calling
3097 SYM. If SYM is a procedure pointer, we can assume the worst. */
3098 if ((sym
->attr
.array_outer_dependency
|| sym
->attr
.proc_pointer
)
3099 && gfc_current_ns
->proc_name
)
3100 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3104 /* Resolve a function call, which means resolving the arguments, then figuring
3105 out which entity the name refers to. */
3108 resolve_function (gfc_expr
*expr
)
3110 gfc_actual_arglist
*arg
;
3114 procedure_type p
= PROC_INTRINSIC
;
3115 bool no_formal_args
;
3119 sym
= expr
->symtree
->n
.sym
;
3121 /* If this is a procedure pointer component, it has already been resolved. */
3122 if (gfc_is_proc_ptr_comp (expr
))
3125 /* Avoid re-resolving the arguments of caf_get, which can lead to inserting
3127 if (sym
&& sym
->attr
.intrinsic
3128 && (sym
->intmod_sym_id
== GFC_ISYM_CAF_GET
3129 || sym
->intmod_sym_id
== GFC_ISYM_CAF_SEND
))
3132 if (sym
&& sym
->attr
.intrinsic
3133 && !gfc_resolve_intrinsic (sym
, &expr
->where
))
3136 if (sym
&& (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.subroutine
))
3138 gfc_error ("%qs at %L is not a function", sym
->name
, &expr
->where
);
3142 /* If this is a deferred TBP with an abstract interface (which may
3143 of course be referenced), expr->value.function.esym will be set. */
3144 if (sym
&& sym
->attr
.abstract
&& !expr
->value
.function
.esym
)
3146 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3147 sym
->name
, &expr
->where
);
3151 /* If this is a deferred TBP with an abstract interface, its result
3152 cannot be an assumed length character (F2003: C418). */
3153 if (sym
&& sym
->attr
.abstract
&& sym
->attr
.function
3154 && sym
->result
->ts
.u
.cl
3155 && sym
->result
->ts
.u
.cl
->length
== NULL
3156 && !sym
->result
->ts
.deferred
)
3158 gfc_error ("ABSTRACT INTERFACE %qs at %L must not have an assumed "
3159 "character length result (F2008: C418)", sym
->name
,
3164 /* Switch off assumed size checking and do this again for certain kinds
3165 of procedure, once the procedure itself is resolved. */
3166 need_full_assumed_size
++;
3168 if (expr
->symtree
&& expr
->symtree
->n
.sym
)
3169 p
= expr
->symtree
->n
.sym
->attr
.proc
;
3171 if (expr
->value
.function
.isym
&& expr
->value
.function
.isym
->inquiry
)
3172 inquiry_argument
= true;
3173 no_formal_args
= sym
&& is_external_proc (sym
)
3174 && gfc_sym_get_dummy_args (sym
) == NULL
;
3176 if (!resolve_actual_arglist (expr
->value
.function
.actual
,
3179 inquiry_argument
= false;
3183 inquiry_argument
= false;
3185 /* Resume assumed_size checking. */
3186 need_full_assumed_size
--;
3188 /* If the procedure is external, check for usage. */
3189 if (sym
&& is_external_proc (sym
))
3190 resolve_global_procedure (sym
, &expr
->where
, 0);
3192 if (sym
&& sym
->ts
.type
== BT_CHARACTER
3194 && sym
->ts
.u
.cl
->length
== NULL
3196 && !sym
->ts
.deferred
3197 && expr
->value
.function
.esym
== NULL
3198 && !sym
->attr
.contained
)
3200 /* Internal procedures are taken care of in resolve_contained_fntype. */
3201 gfc_error ("Function %qs is declared CHARACTER(*) and cannot "
3202 "be used at %L since it is not a dummy argument",
3203 sym
->name
, &expr
->where
);
3207 /* See if function is already resolved. */
3209 if (expr
->value
.function
.name
!= NULL
3210 || expr
->value
.function
.isym
!= NULL
)
3212 if (expr
->ts
.type
== BT_UNKNOWN
)
3218 /* Apply the rules of section 14.1.2. */
3220 switch (procedure_kind (sym
))
3223 t
= resolve_generic_f (expr
);
3226 case PTYPE_SPECIFIC
:
3227 t
= resolve_specific_f (expr
);
3231 t
= resolve_unknown_f (expr
);
3235 gfc_internal_error ("resolve_function(): bad function type");
3239 /* If the expression is still a function (it might have simplified),
3240 then we check to see if we are calling an elemental function. */
3242 if (expr
->expr_type
!= EXPR_FUNCTION
)
3245 /* Walk the argument list looking for invalid BOZ. */
3246 for (arg
= expr
->value
.function
.actual
; arg
; arg
= arg
->next
)
3247 if (arg
->expr
&& arg
->expr
->ts
.type
== BT_BOZ
)
3249 gfc_error ("A BOZ literal constant at %L cannot appear as an "
3250 "actual argument in a function reference",
3255 temp
= need_full_assumed_size
;
3256 need_full_assumed_size
= 0;
3258 if (!resolve_elemental_actual (expr
, NULL
))
3261 if (omp_workshare_flag
3262 && expr
->value
.function
.esym
3263 && ! gfc_elemental (expr
->value
.function
.esym
))
3265 gfc_error ("User defined non-ELEMENTAL function %qs at %L not allowed "
3266 "in WORKSHARE construct", expr
->value
.function
.esym
->name
,
3271 #define GENERIC_ID expr->value.function.isym->id
3272 else if (expr
->value
.function
.actual
!= NULL
3273 && expr
->value
.function
.isym
!= NULL
3274 && GENERIC_ID
!= GFC_ISYM_LBOUND
3275 && GENERIC_ID
!= GFC_ISYM_LCOBOUND
3276 && GENERIC_ID
!= GFC_ISYM_UCOBOUND
3277 && GENERIC_ID
!= GFC_ISYM_LEN
3278 && GENERIC_ID
!= GFC_ISYM_LOC
3279 && GENERIC_ID
!= GFC_ISYM_C_LOC
3280 && GENERIC_ID
!= GFC_ISYM_PRESENT
)
3282 /* Array intrinsics must also have the last upper bound of an
3283 assumed size array argument. UBOUND and SIZE have to be
3284 excluded from the check if the second argument is anything
3287 for (arg
= expr
->value
.function
.actual
; arg
; arg
= arg
->next
)
3289 if ((GENERIC_ID
== GFC_ISYM_UBOUND
|| GENERIC_ID
== GFC_ISYM_SIZE
)
3290 && arg
== expr
->value
.function
.actual
3291 && arg
->next
!= NULL
&& arg
->next
->expr
)
3293 if (arg
->next
->expr
->expr_type
!= EXPR_CONSTANT
)
3296 if (arg
->next
->name
&& strcmp (arg
->next
->name
, "kind") == 0)
3299 if ((int)mpz_get_si (arg
->next
->expr
->value
.integer
)
3304 if (arg
->expr
!= NULL
3305 && arg
->expr
->rank
> 0
3306 && resolve_assumed_size_actual (arg
->expr
))
3312 need_full_assumed_size
= temp
;
3314 if (!check_pure_function(expr
))
3317 /* Functions without the RECURSIVE attribution are not allowed to
3318 * call themselves. */
3319 if (expr
->value
.function
.esym
&& !expr
->value
.function
.esym
->attr
.recursive
)
3322 esym
= expr
->value
.function
.esym
;
3324 if (is_illegal_recursion (esym
, gfc_current_ns
))
3326 if (esym
->attr
.entry
&& esym
->ns
->entries
)
3327 gfc_error ("ENTRY %qs at %L cannot be called recursively, as"
3328 " function %qs is not RECURSIVE",
3329 esym
->name
, &expr
->where
, esym
->ns
->entries
->sym
->name
);
3331 gfc_error ("Function %qs at %L cannot be called recursively, as it"
3332 " is not RECURSIVE", esym
->name
, &expr
->where
);
3338 /* Character lengths of use associated functions may contains references to
3339 symbols not referenced from the current program unit otherwise. Make sure
3340 those symbols are marked as referenced. */
3342 if (expr
->ts
.type
== BT_CHARACTER
&& expr
->value
.function
.esym
3343 && expr
->value
.function
.esym
->attr
.use_assoc
)
3345 gfc_expr_set_symbols_referenced (expr
->ts
.u
.cl
->length
);
3348 /* Make sure that the expression has a typespec that works. */
3349 if (expr
->ts
.type
== BT_UNKNOWN
)
3351 if (expr
->symtree
->n
.sym
->result
3352 && expr
->symtree
->n
.sym
->result
->ts
.type
!= BT_UNKNOWN
3353 && !expr
->symtree
->n
.sym
->result
->attr
.proc_pointer
)
3354 expr
->ts
= expr
->symtree
->n
.sym
->result
->ts
;
3357 if (!expr
->ref
&& !expr
->value
.function
.isym
)
3359 if (expr
->value
.function
.esym
)
3360 update_current_proc_array_outer_dependency (expr
->value
.function
.esym
);
3362 update_current_proc_array_outer_dependency (sym
);
3365 /* typebound procedure: Assume the worst. */
3366 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3372 /************* Subroutine resolution *************/
3375 pure_subroutine (gfc_symbol
*sym
, const char *name
, locus
*loc
)
3382 gfc_error ("Subroutine call to %qs in FORALL block at %L is not PURE",
3386 else if (gfc_do_concurrent_flag
)
3388 gfc_error ("Subroutine call to %qs in DO CONCURRENT block at %L is not "
3392 else if (gfc_pure (NULL
))
3394 gfc_error ("Subroutine call to %qs at %L is not PURE", name
, loc
);
3398 gfc_unset_implicit_pure (NULL
);
3404 resolve_generic_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3408 if (sym
->attr
.generic
)
3410 s
= gfc_search_interface (sym
->generic
, 1, &c
->ext
.actual
);
3413 c
->resolved_sym
= s
;
3414 if (!pure_subroutine (s
, s
->name
, &c
->loc
))
3419 /* TODO: Need to search for elemental references in generic interface. */
3422 if (sym
->attr
.intrinsic
)
3423 return gfc_intrinsic_sub_interface (c
, 0);
3430 resolve_generic_s (gfc_code
*c
)
3435 sym
= c
->symtree
->n
.sym
;
3439 m
= resolve_generic_s0 (c
, sym
);
3442 else if (m
== MATCH_ERROR
)
3446 if (sym
->ns
->parent
== NULL
)
3448 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3452 if (!generic_sym (sym
))
3456 /* Last ditch attempt. See if the reference is to an intrinsic
3457 that possesses a matching interface. 14.1.2.4 */
3458 sym
= c
->symtree
->n
.sym
;
3460 if (!gfc_is_intrinsic (sym
, 1, c
->loc
))
3462 gfc_error ("There is no specific subroutine for the generic %qs at %L",
3463 sym
->name
, &c
->loc
);
3467 m
= gfc_intrinsic_sub_interface (c
, 0);
3471 gfc_error ("Generic subroutine %qs at %L is not consistent with an "
3472 "intrinsic subroutine interface", sym
->name
, &c
->loc
);
3478 /* Resolve a subroutine call known to be specific. */
3481 resolve_specific_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3485 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
3487 if (sym
->attr
.dummy
)
3489 sym
->attr
.proc
= PROC_DUMMY
;
3493 sym
->attr
.proc
= PROC_EXTERNAL
;
3497 if (sym
->attr
.proc
== PROC_MODULE
|| sym
->attr
.proc
== PROC_INTERNAL
)
3500 if (sym
->attr
.intrinsic
)
3502 m
= gfc_intrinsic_sub_interface (c
, 1);
3506 gfc_error ("Subroutine %qs at %L is INTRINSIC but is not compatible "
3507 "with an intrinsic", sym
->name
, &c
->loc
);
3515 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3517 c
->resolved_sym
= sym
;
3518 if (!pure_subroutine (sym
, sym
->name
, &c
->loc
))
3526 resolve_specific_s (gfc_code
*c
)
3531 sym
= c
->symtree
->n
.sym
;
3535 m
= resolve_specific_s0 (c
, sym
);
3538 if (m
== MATCH_ERROR
)
3541 if (sym
->ns
->parent
== NULL
)
3544 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3550 sym
= c
->symtree
->n
.sym
;
3551 gfc_error ("Unable to resolve the specific subroutine %qs at %L",
3552 sym
->name
, &c
->loc
);
3558 /* Resolve a subroutine call not known to be generic nor specific. */
3561 resolve_unknown_s (gfc_code
*c
)
3565 sym
= c
->symtree
->n
.sym
;
3567 if (sym
->attr
.dummy
)
3569 sym
->attr
.proc
= PROC_DUMMY
;
3573 /* See if we have an intrinsic function reference. */
3575 if (gfc_is_intrinsic (sym
, 1, c
->loc
))
3577 if (gfc_intrinsic_sub_interface (c
, 1) == MATCH_YES
)
3582 /* The reference is to an external name. */
3585 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3587 c
->resolved_sym
= sym
;
3589 return pure_subroutine (sym
, sym
->name
, &c
->loc
);
3593 /* Resolve a subroutine call. Although it was tempting to use the same code
3594 for functions, subroutines and functions are stored differently and this
3595 makes things awkward. */
3598 resolve_call (gfc_code
*c
)
3601 procedure_type ptype
= PROC_INTRINSIC
;
3602 gfc_symbol
*csym
, *sym
;
3603 bool no_formal_args
;
3605 csym
= c
->symtree
? c
->symtree
->n
.sym
: NULL
;
3607 if (csym
&& csym
->ts
.type
!= BT_UNKNOWN
)
3609 gfc_error ("%qs at %L has a type, which is not consistent with "
3610 "the CALL at %L", csym
->name
, &csym
->declared_at
, &c
->loc
);
3614 if (csym
&& gfc_current_ns
->parent
&& csym
->ns
!= gfc_current_ns
)
3617 gfc_find_sym_tree (c
->symtree
->name
, gfc_current_ns
, 1, &st
);
3618 sym
= st
? st
->n
.sym
: NULL
;
3619 if (sym
&& csym
!= sym
3620 && sym
->ns
== gfc_current_ns
3621 && sym
->attr
.flavor
== FL_PROCEDURE
3622 && sym
->attr
.contained
)
3625 if (csym
->attr
.generic
)
3626 c
->symtree
->n
.sym
= sym
;
3629 csym
= c
->symtree
->n
.sym
;
3633 /* If this ia a deferred TBP, c->expr1 will be set. */
3634 if (!c
->expr1
&& csym
)
3636 if (csym
->attr
.abstract
)
3638 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3639 csym
->name
, &c
->loc
);
3643 /* Subroutines without the RECURSIVE attribution are not allowed to
3645 if (is_illegal_recursion (csym
, gfc_current_ns
))
3647 if (csym
->attr
.entry
&& csym
->ns
->entries
)
3648 gfc_error ("ENTRY %qs at %L cannot be called recursively, "
3649 "as subroutine %qs is not RECURSIVE",
3650 csym
->name
, &c
->loc
, csym
->ns
->entries
->sym
->name
);
3652 gfc_error ("SUBROUTINE %qs at %L cannot be called recursively, "
3653 "as it is not RECURSIVE", csym
->name
, &c
->loc
);
3659 /* Switch off assumed size checking and do this again for certain kinds
3660 of procedure, once the procedure itself is resolved. */
3661 need_full_assumed_size
++;
3664 ptype
= csym
->attr
.proc
;
3666 no_formal_args
= csym
&& is_external_proc (csym
)
3667 && gfc_sym_get_dummy_args (csym
) == NULL
;
3668 if (!resolve_actual_arglist (c
->ext
.actual
, ptype
, no_formal_args
))
3671 /* Resume assumed_size checking. */
3672 need_full_assumed_size
--;
3674 /* If external, check for usage. */
3675 if (csym
&& is_external_proc (csym
))
3676 resolve_global_procedure (csym
, &c
->loc
, 1);
3679 if (c
->resolved_sym
== NULL
)
3681 c
->resolved_isym
= NULL
;
3682 switch (procedure_kind (csym
))
3685 t
= resolve_generic_s (c
);
3688 case PTYPE_SPECIFIC
:
3689 t
= resolve_specific_s (c
);
3693 t
= resolve_unknown_s (c
);
3697 gfc_internal_error ("resolve_subroutine(): bad function type");
3701 /* Some checks of elemental subroutine actual arguments. */
3702 if (!resolve_elemental_actual (NULL
, c
))
3706 update_current_proc_array_outer_dependency (csym
);
3708 /* Typebound procedure: Assume the worst. */
3709 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3715 /* Compare the shapes of two arrays that have non-NULL shapes. If both
3716 op1->shape and op2->shape are non-NULL return true if their shapes
3717 match. If both op1->shape and op2->shape are non-NULL return false
3718 if their shapes do not match. If either op1->shape or op2->shape is
3719 NULL, return true. */
3722 compare_shapes (gfc_expr
*op1
, gfc_expr
*op2
)
3729 if (op1
->shape
!= NULL
&& op2
->shape
!= NULL
)
3731 for (i
= 0; i
< op1
->rank
; i
++)
3733 if (mpz_cmp (op1
->shape
[i
], op2
->shape
[i
]) != 0)
3735 gfc_error ("Shapes for operands at %L and %L are not conformable",
3736 &op1
->where
, &op2
->where
);
3746 /* Convert a logical operator to the corresponding bitwise intrinsic call.
3747 For example A .AND. B becomes IAND(A, B). */
3749 logical_to_bitwise (gfc_expr
*e
)
3751 gfc_expr
*tmp
, *op1
, *op2
;
3753 gfc_actual_arglist
*args
= NULL
;
3755 gcc_assert (e
->expr_type
== EXPR_OP
);
3757 isym
= GFC_ISYM_NONE
;
3758 op1
= e
->value
.op
.op1
;
3759 op2
= e
->value
.op
.op2
;
3761 switch (e
->value
.op
.op
)
3764 isym
= GFC_ISYM_NOT
;
3767 isym
= GFC_ISYM_IAND
;
3770 isym
= GFC_ISYM_IOR
;
3772 case INTRINSIC_NEQV
:
3773 isym
= GFC_ISYM_IEOR
;
3776 /* "Bitwise eqv" is just the complement of NEQV === IEOR.
3777 Change the old expression to NEQV, which will get replaced by IEOR,
3778 and wrap it in NOT. */
3779 tmp
= gfc_copy_expr (e
);
3780 tmp
->value
.op
.op
= INTRINSIC_NEQV
;
3781 tmp
= logical_to_bitwise (tmp
);
3782 isym
= GFC_ISYM_NOT
;
3787 gfc_internal_error ("logical_to_bitwise(): Bad intrinsic");
3790 /* Inherit the original operation's operands as arguments. */
3791 args
= gfc_get_actual_arglist ();
3795 args
->next
= gfc_get_actual_arglist ();
3796 args
->next
->expr
= op2
;
3799 /* Convert the expression to a function call. */
3800 e
->expr_type
= EXPR_FUNCTION
;
3801 e
->value
.function
.actual
= args
;
3802 e
->value
.function
.isym
= gfc_intrinsic_function_by_id (isym
);
3803 e
->value
.function
.name
= e
->value
.function
.isym
->name
;
3804 e
->value
.function
.esym
= NULL
;
3806 /* Make up a pre-resolved function call symtree if we need to. */
3807 if (!e
->symtree
|| !e
->symtree
->n
.sym
)
3810 gfc_get_ha_sym_tree (e
->value
.function
.isym
->name
, &e
->symtree
);
3811 sym
= e
->symtree
->n
.sym
;
3813 sym
->attr
.flavor
= FL_PROCEDURE
;
3814 sym
->attr
.function
= 1;
3815 sym
->attr
.elemental
= 1;
3817 sym
->attr
.referenced
= 1;
3818 gfc_intrinsic_symbol (sym
);
3819 gfc_commit_symbol (sym
);
3822 args
->name
= e
->value
.function
.isym
->formal
->name
;
3823 if (e
->value
.function
.isym
->formal
->next
)
3824 args
->next
->name
= e
->value
.function
.isym
->formal
->next
->name
;
3829 /* Recursively append candidate UOP to CANDIDATES. Store the number of
3830 candidates in CANDIDATES_LEN. */
3832 lookup_uop_fuzzy_find_candidates (gfc_symtree
*uop
,
3834 size_t &candidates_len
)
3841 /* Not sure how to properly filter here. Use all for a start.
3842 n.uop.op is NULL for empty interface operators (is that legal?) disregard
3843 these as i suppose they don't make terribly sense. */
3845 if (uop
->n
.uop
->op
!= NULL
)
3846 vec_push (candidates
, candidates_len
, uop
->name
);
3850 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3854 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3857 /* Lookup user-operator OP fuzzily, taking names in UOP into account. */
3860 lookup_uop_fuzzy (const char *op
, gfc_symtree
*uop
)
3862 char **candidates
= NULL
;
3863 size_t candidates_len
= 0;
3864 lookup_uop_fuzzy_find_candidates (uop
, candidates
, candidates_len
);
3865 return gfc_closest_fuzzy_match (op
, candidates
);
3869 /* Callback finding an impure function as an operand to an .and. or
3870 .or. expression. Remember the last function warned about to
3871 avoid double warnings when recursing. */
3874 impure_function_callback (gfc_expr
**e
, int *walk_subtrees ATTRIBUTE_UNUSED
,
3879 static gfc_expr
*last
= NULL
;
3880 bool *found
= (bool *) data
;
3882 if (f
->expr_type
== EXPR_FUNCTION
)
3885 if (f
!= last
&& !gfc_pure_function (f
, &name
)
3886 && !gfc_implicit_pure_function (f
))
3889 gfc_warning (OPT_Wfunction_elimination
,
3890 "Impure function %qs at %L might not be evaluated",
3893 gfc_warning (OPT_Wfunction_elimination
,
3894 "Impure function at %L might not be evaluated",
3904 /* Resolve an operator expression node. This can involve replacing the
3905 operation with a user defined function call. */
3908 resolve_operator (gfc_expr
*e
)
3910 gfc_expr
*op1
, *op2
;
3912 bool dual_locus_error
;
3915 /* Resolve all subnodes-- give them types. */
3917 switch (e
->value
.op
.op
)
3920 if (!gfc_resolve_expr (e
->value
.op
.op2
))
3926 case INTRINSIC_UPLUS
:
3927 case INTRINSIC_UMINUS
:
3928 case INTRINSIC_PARENTHESES
:
3929 if (!gfc_resolve_expr (e
->value
.op
.op1
))
3932 && e
->value
.op
.op1
->ts
.type
== BT_BOZ
&& !e
->value
.op
.op2
)
3934 gfc_error ("BOZ literal constant at %L cannot be an operand of "
3935 "unary operator %qs", &e
->value
.op
.op1
->where
,
3936 gfc_op2string (e
->value
.op
.op
));
3942 /* Typecheck the new node. */
3944 op1
= e
->value
.op
.op1
;
3945 op2
= e
->value
.op
.op2
;
3946 dual_locus_error
= false;
3948 /* op1 and op2 cannot both be BOZ. */
3949 if (op1
&& op1
->ts
.type
== BT_BOZ
3950 && op2
&& op2
->ts
.type
== BT_BOZ
)
3952 gfc_error ("Operands at %L and %L cannot appear as operands of "
3953 "binary operator %qs", &op1
->where
, &op2
->where
,
3954 gfc_op2string (e
->value
.op
.op
));
3958 if ((op1
&& op1
->expr_type
== EXPR_NULL
)
3959 || (op2
&& op2
->expr_type
== EXPR_NULL
))
3961 sprintf (msg
, _("Invalid context for NULL() pointer at %%L"));
3965 switch (e
->value
.op
.op
)
3967 case INTRINSIC_UPLUS
:
3968 case INTRINSIC_UMINUS
:
3969 if (op1
->ts
.type
== BT_INTEGER
3970 || op1
->ts
.type
== BT_REAL
3971 || op1
->ts
.type
== BT_COMPLEX
)
3977 sprintf (msg
, _("Operand of unary numeric operator %%<%s%%> at %%L is %s"),
3978 gfc_op2string (e
->value
.op
.op
), gfc_typename (e
));
3981 case INTRINSIC_PLUS
:
3982 case INTRINSIC_MINUS
:
3983 case INTRINSIC_TIMES
:
3984 case INTRINSIC_DIVIDE
:
3985 case INTRINSIC_POWER
:
3986 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
3988 gfc_type_convert_binary (e
, 1);
3992 if (op1
->ts
.type
== BT_DERIVED
|| op2
->ts
.type
== BT_DERIVED
)
3994 _("Unexpected derived-type entities in binary intrinsic "
3995 "numeric operator %%<%s%%> at %%L"),
3996 gfc_op2string (e
->value
.op
.op
));
3999 _("Operands of binary numeric operator %%<%s%%> at %%L are %s/%s"),
4000 gfc_op2string (e
->value
.op
.op
), gfc_typename (op1
),
4001 gfc_typename (op2
));
4004 case INTRINSIC_CONCAT
:
4005 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
4006 && op1
->ts
.kind
== op2
->ts
.kind
)
4008 e
->ts
.type
= BT_CHARACTER
;
4009 e
->ts
.kind
= op1
->ts
.kind
;
4014 _("Operands of string concatenation operator at %%L are %s/%s"),
4015 gfc_typename (op1
), gfc_typename (op2
));
4021 case INTRINSIC_NEQV
:
4022 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
4024 e
->ts
.type
= BT_LOGICAL
;
4025 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
4026 if (op1
->ts
.kind
< e
->ts
.kind
)
4027 gfc_convert_type (op1
, &e
->ts
, 2);
4028 else if (op2
->ts
.kind
< e
->ts
.kind
)
4029 gfc_convert_type (op2
, &e
->ts
, 2);
4031 if (flag_frontend_optimize
&&
4032 (e
->value
.op
.op
== INTRINSIC_AND
|| e
->value
.op
.op
== INTRINSIC_OR
))
4034 /* Warn about short-circuiting
4035 with impure function as second operand. */
4037 gfc_expr_walker (&op2
, impure_function_callback
, &op2_f
);
4042 /* Logical ops on integers become bitwise ops with -fdec. */
4044 && (op1
->ts
.type
== BT_INTEGER
|| op2
->ts
.type
== BT_INTEGER
))
4046 e
->ts
.type
= BT_INTEGER
;
4047 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
4048 if (op1
->ts
.type
!= e
->ts
.type
|| op1
->ts
.kind
!= e
->ts
.kind
)
4049 gfc_convert_type (op1
, &e
->ts
, 1);
4050 if (op2
->ts
.type
!= e
->ts
.type
|| op2
->ts
.kind
!= e
->ts
.kind
)
4051 gfc_convert_type (op2
, &e
->ts
, 1);
4052 e
= logical_to_bitwise (e
);
4056 sprintf (msg
, _("Operands of logical operator %%<%s%%> at %%L are %s/%s"),
4057 gfc_op2string (e
->value
.op
.op
), gfc_typename (op1
),
4058 gfc_typename (op2
));
4063 /* Logical ops on integers become bitwise ops with -fdec. */
4064 if (flag_dec
&& op1
->ts
.type
== BT_INTEGER
)
4066 e
->ts
.type
= BT_INTEGER
;
4067 e
->ts
.kind
= op1
->ts
.kind
;
4068 e
= logical_to_bitwise (e
);
4072 if (op1
->ts
.type
== BT_LOGICAL
)
4074 e
->ts
.type
= BT_LOGICAL
;
4075 e
->ts
.kind
= op1
->ts
.kind
;
4079 sprintf (msg
, _("Operand of .not. operator at %%L is %s"),
4080 gfc_typename (op1
));
4084 case INTRINSIC_GT_OS
:
4086 case INTRINSIC_GE_OS
:
4088 case INTRINSIC_LT_OS
:
4090 case INTRINSIC_LE_OS
:
4091 if (op1
->ts
.type
== BT_COMPLEX
|| op2
->ts
.type
== BT_COMPLEX
)
4093 strcpy (msg
, _("COMPLEX quantities cannot be compared at %L"));
4100 case INTRINSIC_EQ_OS
:
4102 case INTRINSIC_NE_OS
:
4103 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
4104 && op1
->ts
.kind
== op2
->ts
.kind
)
4106 e
->ts
.type
= BT_LOGICAL
;
4107 e
->ts
.kind
= gfc_default_logical_kind
;
4111 /* If op1 is BOZ, then op2 is not!. Try to convert to type of op2. */
4112 if (op1
->ts
.type
== BT_BOZ
)
4114 if (gfc_invalid_boz ("BOZ literal constant near %L cannot appear as "
4115 "an operand of a relational operator",
4119 if (op2
->ts
.type
== BT_INTEGER
&& !gfc_boz2int (op1
, op2
->ts
.kind
))
4122 if (op2
->ts
.type
== BT_REAL
&& !gfc_boz2real (op1
, op2
->ts
.kind
))
4126 /* If op2 is BOZ, then op1 is not!. Try to convert to type of op2. */
4127 if (op2
->ts
.type
== BT_BOZ
)
4129 if (gfc_invalid_boz ("BOZ literal constant near %L cannot appear as "
4130 "an operand of a relational operator",
4134 if (op1
->ts
.type
== BT_INTEGER
&& !gfc_boz2int (op2
, op1
->ts
.kind
))
4137 if (op1
->ts
.type
== BT_REAL
&& !gfc_boz2real (op2
, op1
->ts
.kind
))
4141 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
4143 gfc_type_convert_binary (e
, 1);
4145 e
->ts
.type
= BT_LOGICAL
;
4146 e
->ts
.kind
= gfc_default_logical_kind
;
4148 if (warn_compare_reals
)
4150 gfc_intrinsic_op op
= e
->value
.op
.op
;
4152 /* Type conversion has made sure that the types of op1 and op2
4153 agree, so it is only necessary to check the first one. */
4154 if ((op1
->ts
.type
== BT_REAL
|| op1
->ts
.type
== BT_COMPLEX
)
4155 && (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
4156 || op
== INTRINSIC_NE
|| op
== INTRINSIC_NE_OS
))
4160 if (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
)
4161 msg
= "Equality comparison for %s at %L";
4163 msg
= "Inequality comparison for %s at %L";
4165 gfc_warning (OPT_Wcompare_reals
, msg
,
4166 gfc_typename (op1
), &op1
->where
);
4173 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
4175 _("Logicals at %%L must be compared with %s instead of %s"),
4176 (e
->value
.op
.op
== INTRINSIC_EQ
4177 || e
->value
.op
.op
== INTRINSIC_EQ_OS
)
4178 ? ".eqv." : ".neqv.", gfc_op2string (e
->value
.op
.op
));
4181 _("Operands of comparison operator %%<%s%%> at %%L are %s/%s"),
4182 gfc_op2string (e
->value
.op
.op
), gfc_typename (op1
),
4183 gfc_typename (op2
));
4187 case INTRINSIC_USER
:
4188 if (e
->value
.op
.uop
->op
== NULL
)
4190 const char *name
= e
->value
.op
.uop
->name
;
4191 const char *guessed
;
4192 guessed
= lookup_uop_fuzzy (name
, e
->value
.op
.uop
->ns
->uop_root
);
4194 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L; did you mean '%s'?"),
4197 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L"), name
);
4199 else if (op2
== NULL
)
4200 sprintf (msg
, _("Operand of user operator %%<%s%%> at %%L is %s"),
4201 e
->value
.op
.uop
->name
, gfc_typename (op1
));
4204 sprintf (msg
, _("Operands of user operator %%<%s%%> at %%L are %s/%s"),
4205 e
->value
.op
.uop
->name
, gfc_typename (op1
),
4206 gfc_typename (op2
));
4207 e
->value
.op
.uop
->op
->sym
->attr
.referenced
= 1;
4212 case INTRINSIC_PARENTHESES
:
4214 if (e
->ts
.type
== BT_CHARACTER
)
4215 e
->ts
.u
.cl
= op1
->ts
.u
.cl
;
4219 gfc_internal_error ("resolve_operator(): Bad intrinsic");
4222 /* Deal with arrayness of an operand through an operator. */
4224 switch (e
->value
.op
.op
)
4226 case INTRINSIC_PLUS
:
4227 case INTRINSIC_MINUS
:
4228 case INTRINSIC_TIMES
:
4229 case INTRINSIC_DIVIDE
:
4230 case INTRINSIC_POWER
:
4231 case INTRINSIC_CONCAT
:
4235 case INTRINSIC_NEQV
:
4237 case INTRINSIC_EQ_OS
:
4239 case INTRINSIC_NE_OS
:
4241 case INTRINSIC_GT_OS
:
4243 case INTRINSIC_GE_OS
:
4245 case INTRINSIC_LT_OS
:
4247 case INTRINSIC_LE_OS
:
4249 if (op1
->rank
== 0 && op2
->rank
== 0)
4252 if (op1
->rank
== 0 && op2
->rank
!= 0)
4254 e
->rank
= op2
->rank
;
4256 if (e
->shape
== NULL
)
4257 e
->shape
= gfc_copy_shape (op2
->shape
, op2
->rank
);
4260 if (op1
->rank
!= 0 && op2
->rank
== 0)
4262 e
->rank
= op1
->rank
;
4264 if (e
->shape
== NULL
)
4265 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4268 if (op1
->rank
!= 0 && op2
->rank
!= 0)
4270 if (op1
->rank
== op2
->rank
)
4272 e
->rank
= op1
->rank
;
4273 if (e
->shape
== NULL
)
4275 t
= compare_shapes (op1
, op2
);
4279 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4284 /* Allow higher level expressions to work. */
4287 /* Try user-defined operators, and otherwise throw an error. */
4288 dual_locus_error
= true;
4290 _("Inconsistent ranks for operator at %%L and %%L"));
4297 case INTRINSIC_PARENTHESES
:
4299 case INTRINSIC_UPLUS
:
4300 case INTRINSIC_UMINUS
:
4301 /* Simply copy arrayness attribute */
4302 e
->rank
= op1
->rank
;
4304 if (e
->shape
== NULL
)
4305 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4315 /* Attempt to simplify the expression. */
4318 t
= gfc_simplify_expr (e
, 0);
4319 /* Some calls do not succeed in simplification and return false
4320 even though there is no error; e.g. variable references to
4321 PARAMETER arrays. */
4322 if (!gfc_is_constant_expr (e
))
4330 match m
= gfc_extend_expr (e
);
4333 if (m
== MATCH_ERROR
)
4337 if (dual_locus_error
)
4338 gfc_error (msg
, &op1
->where
, &op2
->where
);
4340 gfc_error (msg
, &e
->where
);
4346 /************** Array resolution subroutines **************/
4349 { CMP_LT
, CMP_EQ
, CMP_GT
, CMP_UNKNOWN
};
4351 /* Compare two integer expressions. */
4353 static compare_result
4354 compare_bound (gfc_expr
*a
, gfc_expr
*b
)
4358 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
4359 || b
== NULL
|| b
->expr_type
!= EXPR_CONSTANT
)
4362 /* If either of the types isn't INTEGER, we must have
4363 raised an error earlier. */
4365 if (a
->ts
.type
!= BT_INTEGER
|| b
->ts
.type
!= BT_INTEGER
)
4368 i
= mpz_cmp (a
->value
.integer
, b
->value
.integer
);
4378 /* Compare an integer expression with an integer. */
4380 static compare_result
4381 compare_bound_int (gfc_expr
*a
, int b
)
4385 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4388 if (a
->ts
.type
!= BT_INTEGER
)
4389 gfc_internal_error ("compare_bound_int(): Bad expression");
4391 i
= mpz_cmp_si (a
->value
.integer
, b
);
4401 /* Compare an integer expression with a mpz_t. */
4403 static compare_result
4404 compare_bound_mpz_t (gfc_expr
*a
, mpz_t b
)
4408 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4411 if (a
->ts
.type
!= BT_INTEGER
)
4412 gfc_internal_error ("compare_bound_int(): Bad expression");
4414 i
= mpz_cmp (a
->value
.integer
, b
);
4424 /* Compute the last value of a sequence given by a triplet.
4425 Return 0 if it wasn't able to compute the last value, or if the
4426 sequence if empty, and 1 otherwise. */
4429 compute_last_value_for_triplet (gfc_expr
*start
, gfc_expr
*end
,
4430 gfc_expr
*stride
, mpz_t last
)
4434 if (start
== NULL
|| start
->expr_type
!= EXPR_CONSTANT
4435 || end
== NULL
|| end
->expr_type
!= EXPR_CONSTANT
4436 || (stride
!= NULL
&& stride
->expr_type
!= EXPR_CONSTANT
))
4439 if (start
->ts
.type
!= BT_INTEGER
|| end
->ts
.type
!= BT_INTEGER
4440 || (stride
!= NULL
&& stride
->ts
.type
!= BT_INTEGER
))
4443 if (stride
== NULL
|| compare_bound_int (stride
, 1) == CMP_EQ
)
4445 if (compare_bound (start
, end
) == CMP_GT
)
4447 mpz_set (last
, end
->value
.integer
);
4451 if (compare_bound_int (stride
, 0) == CMP_GT
)
4453 /* Stride is positive */
4454 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) > 0)
4459 /* Stride is negative */
4460 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) < 0)
4465 mpz_sub (rem
, end
->value
.integer
, start
->value
.integer
);
4466 mpz_tdiv_r (rem
, rem
, stride
->value
.integer
);
4467 mpz_sub (last
, end
->value
.integer
, rem
);
4474 /* Compare a single dimension of an array reference to the array
4478 check_dimension (int i
, gfc_array_ref
*ar
, gfc_array_spec
*as
)
4482 if (ar
->dimen_type
[i
] == DIMEN_STAR
)
4484 gcc_assert (ar
->stride
[i
] == NULL
);
4485 /* This implies [*] as [*:] and [*:3] are not possible. */
4486 if (ar
->start
[i
] == NULL
)
4488 gcc_assert (ar
->end
[i
] == NULL
);
4493 /* Given start, end and stride values, calculate the minimum and
4494 maximum referenced indexes. */
4496 switch (ar
->dimen_type
[i
])
4499 case DIMEN_THIS_IMAGE
:
4504 if (compare_bound (ar
->start
[i
], as
->lower
[i
]) == CMP_LT
)
4507 gfc_warning (0, "Array reference at %L is out of bounds "
4508 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4509 mpz_get_si (ar
->start
[i
]->value
.integer
),
4510 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4512 gfc_warning (0, "Array reference at %L is out of bounds "
4513 "(%ld < %ld) in codimension %d", &ar
->c_where
[i
],
4514 mpz_get_si (ar
->start
[i
]->value
.integer
),
4515 mpz_get_si (as
->lower
[i
]->value
.integer
),
4519 if (compare_bound (ar
->start
[i
], as
->upper
[i
]) == CMP_GT
)
4522 gfc_warning (0, "Array reference at %L is out of bounds "
4523 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4524 mpz_get_si (ar
->start
[i
]->value
.integer
),
4525 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4527 gfc_warning (0, "Array reference at %L is out of bounds "
4528 "(%ld > %ld) in codimension %d", &ar
->c_where
[i
],
4529 mpz_get_si (ar
->start
[i
]->value
.integer
),
4530 mpz_get_si (as
->upper
[i
]->value
.integer
),
4539 #define AR_START (ar->start[i] ? ar->start[i] : as->lower[i])
4540 #define AR_END (ar->end[i] ? ar->end[i] : as->upper[i])
4542 compare_result comp_start_end
= compare_bound (AR_START
, AR_END
);
4544 /* Check for zero stride, which is not allowed. */
4545 if (compare_bound_int (ar
->stride
[i
], 0) == CMP_EQ
)
4547 gfc_error ("Illegal stride of zero at %L", &ar
->c_where
[i
]);
4551 /* if start == len || (stride > 0 && start < len)
4552 || (stride < 0 && start > len),
4553 then the array section contains at least one element. In this
4554 case, there is an out-of-bounds access if
4555 (start < lower || start > upper). */
4556 if (compare_bound (AR_START
, AR_END
) == CMP_EQ
4557 || ((compare_bound_int (ar
->stride
[i
], 0) == CMP_GT
4558 || ar
->stride
[i
] == NULL
) && comp_start_end
== CMP_LT
)
4559 || (compare_bound_int (ar
->stride
[i
], 0) == CMP_LT
4560 && comp_start_end
== CMP_GT
))
4562 if (compare_bound (AR_START
, as
->lower
[i
]) == CMP_LT
)
4564 gfc_warning (0, "Lower array reference at %L is out of bounds "
4565 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4566 mpz_get_si (AR_START
->value
.integer
),
4567 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4570 if (compare_bound (AR_START
, as
->upper
[i
]) == CMP_GT
)
4572 gfc_warning (0, "Lower array reference at %L is out of bounds "
4573 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4574 mpz_get_si (AR_START
->value
.integer
),
4575 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4580 /* If we can compute the highest index of the array section,
4581 then it also has to be between lower and upper. */
4582 mpz_init (last_value
);
4583 if (compute_last_value_for_triplet (AR_START
, AR_END
, ar
->stride
[i
],
4586 if (compare_bound_mpz_t (as
->lower
[i
], last_value
) == CMP_GT
)
4588 gfc_warning (0, "Upper array reference at %L is out of bounds "
4589 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4590 mpz_get_si (last_value
),
4591 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4592 mpz_clear (last_value
);
4595 if (compare_bound_mpz_t (as
->upper
[i
], last_value
) == CMP_LT
)
4597 gfc_warning (0, "Upper array reference at %L is out of bounds "
4598 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4599 mpz_get_si (last_value
),
4600 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4601 mpz_clear (last_value
);
4605 mpz_clear (last_value
);
4613 gfc_internal_error ("check_dimension(): Bad array reference");
4620 /* Compare an array reference with an array specification. */
4623 compare_spec_to_ref (gfc_array_ref
*ar
)
4630 /* TODO: Full array sections are only allowed as actual parameters. */
4631 if (as
->type
== AS_ASSUMED_SIZE
4632 && (/*ar->type == AR_FULL
4633 ||*/ (ar
->type
== AR_SECTION
4634 && ar
->dimen_type
[i
] == DIMEN_RANGE
&& ar
->end
[i
] == NULL
)))
4636 gfc_error ("Rightmost upper bound of assumed size array section "
4637 "not specified at %L", &ar
->where
);
4641 if (ar
->type
== AR_FULL
)
4644 if (as
->rank
!= ar
->dimen
)
4646 gfc_error ("Rank mismatch in array reference at %L (%d/%d)",
4647 &ar
->where
, ar
->dimen
, as
->rank
);
4651 /* ar->codimen == 0 is a local array. */
4652 if (as
->corank
!= ar
->codimen
&& ar
->codimen
!= 0)
4654 gfc_error ("Coindex rank mismatch in array reference at %L (%d/%d)",
4655 &ar
->where
, ar
->codimen
, as
->corank
);
4659 for (i
= 0; i
< as
->rank
; i
++)
4660 if (!check_dimension (i
, ar
, as
))
4663 /* Local access has no coarray spec. */
4664 if (ar
->codimen
!= 0)
4665 for (i
= as
->rank
; i
< as
->rank
+ as
->corank
; i
++)
4667 if (ar
->dimen_type
[i
] != DIMEN_ELEMENT
&& !ar
->in_allocate
4668 && ar
->dimen_type
[i
] != DIMEN_THIS_IMAGE
)
4670 gfc_error ("Coindex of codimension %d must be a scalar at %L",
4671 i
+ 1 - as
->rank
, &ar
->where
);
4674 if (!check_dimension (i
, ar
, as
))
4682 /* Resolve one part of an array index. */
4685 gfc_resolve_index_1 (gfc_expr
*index
, int check_scalar
,
4686 int force_index_integer_kind
)
4693 if (!gfc_resolve_expr (index
))
4696 if (check_scalar
&& index
->rank
!= 0)
4698 gfc_error ("Array index at %L must be scalar", &index
->where
);
4702 if (index
->ts
.type
!= BT_INTEGER
&& index
->ts
.type
!= BT_REAL
)
4704 gfc_error ("Array index at %L must be of INTEGER type, found %s",
4705 &index
->where
, gfc_basic_typename (index
->ts
.type
));
4709 if (index
->ts
.type
== BT_REAL
)
4710 if (!gfc_notify_std (GFC_STD_LEGACY
, "REAL array index at %L",
4714 if ((index
->ts
.kind
!= gfc_index_integer_kind
4715 && force_index_integer_kind
)
4716 || index
->ts
.type
!= BT_INTEGER
)
4719 ts
.type
= BT_INTEGER
;
4720 ts
.kind
= gfc_index_integer_kind
;
4722 gfc_convert_type_warn (index
, &ts
, 2, 0);
4728 /* Resolve one part of an array index. */
4731 gfc_resolve_index (gfc_expr
*index
, int check_scalar
)
4733 return gfc_resolve_index_1 (index
, check_scalar
, 1);
4736 /* Resolve a dim argument to an intrinsic function. */
4739 gfc_resolve_dim_arg (gfc_expr
*dim
)
4744 if (!gfc_resolve_expr (dim
))
4749 gfc_error ("Argument dim at %L must be scalar", &dim
->where
);
4754 if (dim
->ts
.type
!= BT_INTEGER
)
4756 gfc_error ("Argument dim at %L must be of INTEGER type", &dim
->where
);
4760 if (dim
->ts
.kind
!= gfc_index_integer_kind
)
4765 ts
.type
= BT_INTEGER
;
4766 ts
.kind
= gfc_index_integer_kind
;
4768 gfc_convert_type_warn (dim
, &ts
, 2, 0);
4774 /* Given an expression that contains array references, update those array
4775 references to point to the right array specifications. While this is
4776 filled in during matching, this information is difficult to save and load
4777 in a module, so we take care of it here.
4779 The idea here is that the original array reference comes from the
4780 base symbol. We traverse the list of reference structures, setting
4781 the stored reference to references. Component references can
4782 provide an additional array specification. */
4785 find_array_spec (gfc_expr
*e
)
4790 bool class_as
= false;
4792 if (e
->symtree
->n
.sym
->ts
.type
== BT_CLASS
)
4794 as
= CLASS_DATA (e
->symtree
->n
.sym
)->as
;
4798 as
= e
->symtree
->n
.sym
->as
;
4800 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4805 gfc_internal_error ("find_array_spec(): Missing spec");
4812 c
= ref
->u
.c
.component
;
4813 if (c
->attr
.dimension
)
4815 if (as
!= NULL
&& !(class_as
&& as
== c
->as
))
4816 gfc_internal_error ("find_array_spec(): unused as(1)");
4828 gfc_internal_error ("find_array_spec(): unused as(2)");
4832 /* Resolve an array reference. */
4835 resolve_array_ref (gfc_array_ref
*ar
)
4837 int i
, check_scalar
;
4840 for (i
= 0; i
< ar
->dimen
+ ar
->codimen
; i
++)
4842 check_scalar
= ar
->dimen_type
[i
] == DIMEN_RANGE
;
4844 /* Do not force gfc_index_integer_kind for the start. We can
4845 do fine with any integer kind. This avoids temporary arrays
4846 created for indexing with a vector. */
4847 if (!gfc_resolve_index_1 (ar
->start
[i
], check_scalar
, 0))
4849 if (!gfc_resolve_index (ar
->end
[i
], check_scalar
))
4851 if (!gfc_resolve_index (ar
->stride
[i
], check_scalar
))
4856 if (ar
->dimen_type
[i
] == DIMEN_UNKNOWN
)
4860 ar
->dimen_type
[i
] = DIMEN_ELEMENT
;
4864 ar
->dimen_type
[i
] = DIMEN_VECTOR
;
4865 if (e
->expr_type
== EXPR_VARIABLE
4866 && e
->symtree
->n
.sym
->ts
.type
== BT_DERIVED
)
4867 ar
->start
[i
] = gfc_get_parentheses (e
);
4871 gfc_error ("Array index at %L is an array of rank %d",
4872 &ar
->c_where
[i
], e
->rank
);
4876 /* Fill in the upper bound, which may be lower than the
4877 specified one for something like a(2:10:5), which is
4878 identical to a(2:7:5). Only relevant for strides not equal
4879 to one. Don't try a division by zero. */
4880 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4881 && ar
->stride
[i
] != NULL
&& ar
->stride
[i
]->expr_type
== EXPR_CONSTANT
4882 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 1L) != 0
4883 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 0L) != 0)
4887 if (gfc_ref_dimen_size (ar
, i
, &size
, &end
))
4889 if (ar
->end
[i
] == NULL
)
4892 gfc_get_constant_expr (BT_INTEGER
, gfc_index_integer_kind
,
4894 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4896 else if (ar
->end
[i
]->ts
.type
== BT_INTEGER
4897 && ar
->end
[i
]->expr_type
== EXPR_CONSTANT
)
4899 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4910 if (ar
->type
== AR_FULL
)
4912 if (ar
->as
->rank
== 0)
4913 ar
->type
= AR_ELEMENT
;
4915 /* Make sure array is the same as array(:,:), this way
4916 we don't need to special case all the time. */
4917 ar
->dimen
= ar
->as
->rank
;
4918 for (i
= 0; i
< ar
->dimen
; i
++)
4920 ar
->dimen_type
[i
] = DIMEN_RANGE
;
4922 gcc_assert (ar
->start
[i
] == NULL
);
4923 gcc_assert (ar
->end
[i
] == NULL
);
4924 gcc_assert (ar
->stride
[i
] == NULL
);
4928 /* If the reference type is unknown, figure out what kind it is. */
4930 if (ar
->type
== AR_UNKNOWN
)
4932 ar
->type
= AR_ELEMENT
;
4933 for (i
= 0; i
< ar
->dimen
; i
++)
4934 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4935 || ar
->dimen_type
[i
] == DIMEN_VECTOR
)
4937 ar
->type
= AR_SECTION
;
4942 if (!ar
->as
->cray_pointee
&& !compare_spec_to_ref (ar
))
4945 if (ar
->as
->corank
&& ar
->codimen
== 0)
4948 ar
->codimen
= ar
->as
->corank
;
4949 for (n
= ar
->dimen
; n
< ar
->dimen
+ ar
->codimen
; n
++)
4950 ar
->dimen_type
[n
] = DIMEN_THIS_IMAGE
;
4958 resolve_substring (gfc_ref
*ref
, bool *equal_length
)
4960 int k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
4962 if (ref
->u
.ss
.start
!= NULL
)
4964 if (!gfc_resolve_expr (ref
->u
.ss
.start
))
4967 if (ref
->u
.ss
.start
->ts
.type
!= BT_INTEGER
)
4969 gfc_error ("Substring start index at %L must be of type INTEGER",
4970 &ref
->u
.ss
.start
->where
);
4974 if (ref
->u
.ss
.start
->rank
!= 0)
4976 gfc_error ("Substring start index at %L must be scalar",
4977 &ref
->u
.ss
.start
->where
);
4981 if (compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_LT
4982 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4983 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4985 gfc_error ("Substring start index at %L is less than one",
4986 &ref
->u
.ss
.start
->where
);
4991 if (ref
->u
.ss
.end
!= NULL
)
4993 if (!gfc_resolve_expr (ref
->u
.ss
.end
))
4996 if (ref
->u
.ss
.end
->ts
.type
!= BT_INTEGER
)
4998 gfc_error ("Substring end index at %L must be of type INTEGER",
4999 &ref
->u
.ss
.end
->where
);
5003 if (ref
->u
.ss
.end
->rank
!= 0)
5005 gfc_error ("Substring end index at %L must be scalar",
5006 &ref
->u
.ss
.end
->where
);
5010 if (ref
->u
.ss
.length
!= NULL
5011 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_GT
5012 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
5013 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
5015 gfc_error ("Substring end index at %L exceeds the string length",
5016 &ref
->u
.ss
.start
->where
);
5020 if (compare_bound_mpz_t (ref
->u
.ss
.end
,
5021 gfc_integer_kinds
[k
].huge
) == CMP_GT
5022 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
5023 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
5025 gfc_error ("Substring end index at %L is too large",
5026 &ref
->u
.ss
.end
->where
);
5029 /* If the substring has the same length as the original
5030 variable, the reference itself can be deleted. */
5032 if (ref
->u
.ss
.length
!= NULL
5033 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_EQ
5034 && compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_EQ
)
5035 *equal_length
= true;
5042 /* This function supplies missing substring charlens. */
5045 gfc_resolve_substring_charlen (gfc_expr
*e
)
5048 gfc_expr
*start
, *end
;
5049 gfc_typespec
*ts
= NULL
;
5052 for (char_ref
= e
->ref
; char_ref
; char_ref
= char_ref
->next
)
5054 if (char_ref
->type
== REF_SUBSTRING
|| char_ref
->type
== REF_INQUIRY
)
5056 if (char_ref
->type
== REF_COMPONENT
)
5057 ts
= &char_ref
->u
.c
.component
->ts
;
5060 if (!char_ref
|| char_ref
->type
== REF_INQUIRY
)
5063 gcc_assert (char_ref
->next
== NULL
);
5067 if (e
->ts
.u
.cl
->length
)
5068 gfc_free_expr (e
->ts
.u
.cl
->length
);
5069 else if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
->attr
.dummy
)
5073 e
->ts
.type
= BT_CHARACTER
;
5074 e
->ts
.kind
= gfc_default_character_kind
;
5077 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5079 if (char_ref
->u
.ss
.start
)
5080 start
= gfc_copy_expr (char_ref
->u
.ss
.start
);
5082 start
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 1);
5084 if (char_ref
->u
.ss
.end
)
5085 end
= gfc_copy_expr (char_ref
->u
.ss
.end
);
5086 else if (e
->expr_type
== EXPR_VARIABLE
)
5089 ts
= &e
->symtree
->n
.sym
->ts
;
5090 end
= gfc_copy_expr (ts
->u
.cl
->length
);
5097 gfc_free_expr (start
);
5098 gfc_free_expr (end
);
5102 /* Length = (end - start + 1).
5103 Check first whether it has a constant length. */
5104 if (gfc_dep_difference (end
, start
, &diff
))
5106 gfc_expr
*len
= gfc_get_constant_expr (BT_INTEGER
, gfc_charlen_int_kind
,
5109 mpz_add_ui (len
->value
.integer
, diff
, 1);
5111 e
->ts
.u
.cl
->length
= len
;
5112 /* The check for length < 0 is handled below */
5116 e
->ts
.u
.cl
->length
= gfc_subtract (end
, start
);
5117 e
->ts
.u
.cl
->length
= gfc_add (e
->ts
.u
.cl
->length
,
5118 gfc_get_int_expr (gfc_charlen_int_kind
,
5122 /* F2008, 6.4.1: Both the starting point and the ending point shall
5123 be within the range 1, 2, ..., n unless the starting point exceeds
5124 the ending point, in which case the substring has length zero. */
5126 if (mpz_cmp_si (e
->ts
.u
.cl
->length
->value
.integer
, 0) < 0)
5127 mpz_set_si (e
->ts
.u
.cl
->length
->value
.integer
, 0);
5129 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5130 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5132 /* Make sure that the length is simplified. */
5133 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 1);
5134 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5138 /* Resolve subtype references. */
5141 resolve_ref (gfc_expr
*expr
)
5143 int current_part_dimension
, n_components
, seen_part_dimension
;
5144 gfc_ref
*ref
, **prev
;
5147 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5148 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.as
== NULL
)
5150 find_array_spec (expr
);
5154 for (prev
= &expr
->ref
; *prev
!= NULL
;
5155 prev
= *prev
== NULL
? prev
: &(*prev
)->next
)
5156 switch ((*prev
)->type
)
5159 if (!resolve_array_ref (&(*prev
)->u
.ar
))
5168 equal_length
= false;
5169 if (!resolve_substring (*prev
, &equal_length
))
5172 if (expr
->expr_type
!= EXPR_SUBSTRING
&& equal_length
)
5174 /* Remove the reference and move the charlen, if any. */
5178 expr
->ts
.u
.cl
= ref
->u
.ss
.length
;
5179 ref
->u
.ss
.length
= NULL
;
5180 gfc_free_ref_list (ref
);
5185 /* Check constraints on part references. */
5187 current_part_dimension
= 0;
5188 seen_part_dimension
= 0;
5191 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5196 switch (ref
->u
.ar
.type
)
5199 /* Coarray scalar. */
5200 if (ref
->u
.ar
.as
->rank
== 0)
5202 current_part_dimension
= 0;
5207 current_part_dimension
= 1;
5211 current_part_dimension
= 0;
5215 gfc_internal_error ("resolve_ref(): Bad array reference");
5221 if (current_part_dimension
|| seen_part_dimension
)
5224 if (ref
->u
.c
.component
->attr
.pointer
5225 || ref
->u
.c
.component
->attr
.proc_pointer
5226 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5227 && CLASS_DATA (ref
->u
.c
.component
)->attr
.pointer
))
5229 gfc_error ("Component to the right of a part reference "
5230 "with nonzero rank must not have the POINTER "
5231 "attribute at %L", &expr
->where
);
5234 else if (ref
->u
.c
.component
->attr
.allocatable
5235 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5236 && CLASS_DATA (ref
->u
.c
.component
)->attr
.allocatable
))
5239 gfc_error ("Component to the right of a part reference "
5240 "with nonzero rank must not have the ALLOCATABLE "
5241 "attribute at %L", &expr
->where
);
5254 if (((ref
->type
== REF_COMPONENT
&& n_components
> 1)
5255 || ref
->next
== NULL
)
5256 && current_part_dimension
5257 && seen_part_dimension
)
5259 gfc_error ("Two or more part references with nonzero rank must "
5260 "not be specified at %L", &expr
->where
);
5264 if (ref
->type
== REF_COMPONENT
)
5266 if (current_part_dimension
)
5267 seen_part_dimension
= 1;
5269 /* reset to make sure */
5270 current_part_dimension
= 0;
5278 /* Given an expression, determine its shape. This is easier than it sounds.
5279 Leaves the shape array NULL if it is not possible to determine the shape. */
5282 expression_shape (gfc_expr
*e
)
5284 mpz_t array
[GFC_MAX_DIMENSIONS
];
5287 if (e
->rank
<= 0 || e
->shape
!= NULL
)
5290 for (i
= 0; i
< e
->rank
; i
++)
5291 if (!gfc_array_dimen_size (e
, i
, &array
[i
]))
5294 e
->shape
= gfc_get_shape (e
->rank
);
5296 memcpy (e
->shape
, array
, e
->rank
* sizeof (mpz_t
));
5301 for (i
--; i
>= 0; i
--)
5302 mpz_clear (array
[i
]);
5306 /* Given a variable expression node, compute the rank of the expression by
5307 examining the base symbol and any reference structures it may have. */
5310 expression_rank (gfc_expr
*e
)
5315 /* Just to make sure, because EXPR_COMPCALL's also have an e->ref and that
5316 could lead to serious confusion... */
5317 gcc_assert (e
->expr_type
!= EXPR_COMPCALL
);
5321 if (e
->expr_type
== EXPR_ARRAY
)
5323 /* Constructors can have a rank different from one via RESHAPE(). */
5325 if (e
->symtree
== NULL
)
5331 e
->rank
= (e
->symtree
->n
.sym
->as
== NULL
)
5332 ? 0 : e
->symtree
->n
.sym
->as
->rank
;
5338 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5340 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.proc_pointer
5341 && ref
->u
.c
.component
->attr
.function
&& !ref
->next
)
5342 rank
= ref
->u
.c
.component
->as
? ref
->u
.c
.component
->as
->rank
: 0;
5344 if (ref
->type
!= REF_ARRAY
)
5347 if (ref
->u
.ar
.type
== AR_FULL
)
5349 rank
= ref
->u
.ar
.as
->rank
;
5353 if (ref
->u
.ar
.type
== AR_SECTION
)
5355 /* Figure out the rank of the section. */
5357 gfc_internal_error ("expression_rank(): Two array specs");
5359 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
5360 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_RANGE
5361 || ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
)
5371 expression_shape (e
);
5376 add_caf_get_intrinsic (gfc_expr
*e
)
5378 gfc_expr
*wrapper
, *tmp_expr
;
5382 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5383 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5388 for (n
= ref
->u
.ar
.dimen
; n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
5389 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_ELEMENT
)
5392 tmp_expr
= XCNEW (gfc_expr
);
5394 wrapper
= gfc_build_intrinsic_call (gfc_current_ns
, GFC_ISYM_CAF_GET
,
5395 "caf_get", tmp_expr
->where
, 1, tmp_expr
);
5396 wrapper
->ts
= e
->ts
;
5397 wrapper
->rank
= e
->rank
;
5399 wrapper
->shape
= gfc_copy_shape (e
->shape
, e
->rank
);
5406 remove_caf_get_intrinsic (gfc_expr
*e
)
5408 gcc_assert (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
5409 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
);
5410 gfc_expr
*e2
= e
->value
.function
.actual
->expr
;
5411 e
->value
.function
.actual
->expr
= NULL
;
5412 gfc_free_actual_arglist (e
->value
.function
.actual
);
5413 gfc_free_shape (&e
->shape
, e
->rank
);
5419 /* Resolve a variable expression. */
5422 resolve_variable (gfc_expr
*e
)
5429 if (e
->symtree
== NULL
)
5431 sym
= e
->symtree
->n
.sym
;
5433 /* Use same check as for TYPE(*) below; this check has to be before TYPE(*)
5434 as ts.type is set to BT_ASSUMED in resolve_symbol. */
5435 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
5437 if (!actual_arg
|| inquiry_argument
)
5439 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may only "
5440 "be used as actual argument", sym
->name
, &e
->where
);
5444 /* TS 29113, 407b. */
5445 else if (e
->ts
.type
== BT_ASSUMED
)
5449 gfc_error ("Assumed-type variable %s at %L may only be used "
5450 "as actual argument", sym
->name
, &e
->where
);
5453 else if (inquiry_argument
&& !first_actual_arg
)
5455 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5456 for all inquiry functions in resolve_function; the reason is
5457 that the function-name resolution happens too late in that
5459 gfc_error ("Assumed-type variable %s at %L as actual argument to "
5460 "an inquiry function shall be the first argument",
5461 sym
->name
, &e
->where
);
5465 /* TS 29113, C535b. */
5466 else if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5467 && CLASS_DATA (sym
)->as
5468 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5469 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5470 && sym
->as
->type
== AS_ASSUMED_RANK
))
5471 && !sym
->attr
.select_rank_temporary
)
5474 && !(cs_base
&& cs_base
->current
5475 && cs_base
->current
->op
== EXEC_SELECT_RANK
))
5477 gfc_error ("Assumed-rank variable %s at %L may only be used as "
5478 "actual argument", sym
->name
, &e
->where
);
5481 else if (inquiry_argument
&& !first_actual_arg
)
5483 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5484 for all inquiry functions in resolve_function; the reason is
5485 that the function-name resolution happens too late in that
5487 gfc_error ("Assumed-rank variable %s at %L as actual argument "
5488 "to an inquiry function shall be the first argument",
5489 sym
->name
, &e
->where
);
5494 if ((sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
)) && e
->ref
5495 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5496 && e
->ref
->next
== NULL
))
5498 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall not have "
5499 "a subobject reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5502 /* TS 29113, 407b. */
5503 else if (e
->ts
.type
== BT_ASSUMED
&& e
->ref
5504 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5505 && e
->ref
->next
== NULL
))
5507 gfc_error ("Assumed-type variable %s at %L shall not have a subobject "
5508 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5512 /* TS 29113, C535b. */
5513 if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5514 && CLASS_DATA (sym
)->as
5515 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5516 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5517 && sym
->as
->type
== AS_ASSUMED_RANK
))
5519 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5520 && e
->ref
->next
== NULL
))
5522 gfc_error ("Assumed-rank variable %s at %L shall not have a subobject "
5523 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5527 /* For variables that are used in an associate (target => object) where
5528 the object's basetype is array valued while the target is scalar,
5529 the ts' type of the component refs is still array valued, which
5530 can't be translated that way. */
5531 if (sym
->assoc
&& e
->rank
== 0 && e
->ref
&& sym
->ts
.type
== BT_CLASS
5532 && sym
->assoc
->target
&& sym
->assoc
->target
->ts
.type
== BT_CLASS
5533 && CLASS_DATA (sym
->assoc
->target
)->as
)
5535 gfc_ref
*ref
= e
->ref
;
5541 ref
->u
.c
.sym
= sym
->ts
.u
.derived
;
5542 /* Stop the loop. */
5552 /* If this is an associate-name, it may be parsed with an array reference
5553 in error even though the target is scalar. Fail directly in this case.
5554 TODO Understand why class scalar expressions must be excluded. */
5555 if (sym
->assoc
&& !(sym
->ts
.type
== BT_CLASS
&& e
->rank
== 0))
5557 if (sym
->ts
.type
== BT_CLASS
)
5558 gfc_fix_class_refs (e
);
5559 if (!sym
->attr
.dimension
&& e
->ref
&& e
->ref
->type
== REF_ARRAY
)
5561 else if (sym
->attr
.dimension
&& (!e
->ref
|| e
->ref
->type
!= REF_ARRAY
))
5563 /* This can happen because the parser did not detect that the
5564 associate name is an array and the expression had no array
5566 gfc_ref
*ref
= gfc_get_ref ();
5567 ref
->type
= REF_ARRAY
;
5568 ref
->u
.ar
= *gfc_get_array_ref();
5569 ref
->u
.ar
.type
= AR_FULL
;
5572 ref
->u
.ar
.as
= sym
->as
;
5573 ref
->u
.ar
.dimen
= sym
->as
->rank
;
5581 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.generic
)
5582 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
5584 /* On the other hand, the parser may not have known this is an array;
5585 in this case, we have to add a FULL reference. */
5586 if (sym
->assoc
&& sym
->attr
.dimension
&& !e
->ref
)
5588 e
->ref
= gfc_get_ref ();
5589 e
->ref
->type
= REF_ARRAY
;
5590 e
->ref
->u
.ar
.type
= AR_FULL
;
5591 e
->ref
->u
.ar
.dimen
= 0;
5594 /* Like above, but for class types, where the checking whether an array
5595 ref is present is more complicated. Furthermore make sure not to add
5596 the full array ref to _vptr or _len refs. */
5597 if (sym
->assoc
&& sym
->ts
.type
== BT_CLASS
5598 && CLASS_DATA (sym
)->attr
.dimension
5599 && (e
->ts
.type
!= BT_DERIVED
|| !e
->ts
.u
.derived
->attr
.vtype
))
5601 gfc_ref
*ref
, *newref
;
5603 newref
= gfc_get_ref ();
5604 newref
->type
= REF_ARRAY
;
5605 newref
->u
.ar
.type
= AR_FULL
;
5606 newref
->u
.ar
.dimen
= 0;
5607 /* Because this is an associate var and the first ref either is a ref to
5608 the _data component or not, no traversal of the ref chain is
5609 needed. The array ref needs to be inserted after the _data ref,
5610 or when that is not present, which may happend for polymorphic
5611 types, then at the first position. */
5615 else if (ref
->type
== REF_COMPONENT
5616 && strcmp ("_data", ref
->u
.c
.component
->name
) == 0)
5618 if (!ref
->next
|| ref
->next
->type
!= REF_ARRAY
)
5620 newref
->next
= ref
->next
;
5624 /* Array ref present already. */
5625 gfc_free_ref_list (newref
);
5627 else if (ref
->type
== REF_ARRAY
)
5628 /* Array ref present already. */
5629 gfc_free_ref_list (newref
);
5637 if (e
->ref
&& !resolve_ref (e
))
5640 if (sym
->attr
.flavor
== FL_PROCEDURE
5641 && (!sym
->attr
.function
5642 || (sym
->attr
.function
&& sym
->result
5643 && sym
->result
->attr
.proc_pointer
5644 && !sym
->result
->attr
.function
)))
5646 e
->ts
.type
= BT_PROCEDURE
;
5647 goto resolve_procedure
;
5650 if (sym
->ts
.type
!= BT_UNKNOWN
)
5651 gfc_variable_attr (e
, &e
->ts
);
5652 else if (sym
->attr
.flavor
== FL_PROCEDURE
5653 && sym
->attr
.function
&& sym
->result
5654 && sym
->result
->ts
.type
!= BT_UNKNOWN
5655 && sym
->result
->attr
.proc_pointer
)
5656 e
->ts
= sym
->result
->ts
;
5659 /* Must be a simple variable reference. */
5660 if (!gfc_set_default_type (sym
, 1, sym
->ns
))
5665 if (check_assumed_size_reference (sym
, e
))
5668 /* Deal with forward references to entries during gfc_resolve_code, to
5669 satisfy, at least partially, 12.5.2.5. */
5670 if (gfc_current_ns
->entries
5671 && current_entry_id
== sym
->entry_id
5674 && cs_base
->current
->op
!= EXEC_ENTRY
)
5676 gfc_entry_list
*entry
;
5677 gfc_formal_arglist
*formal
;
5679 bool seen
, saved_specification_expr
;
5681 /* If the symbol is a dummy... */
5682 if (sym
->attr
.dummy
&& sym
->ns
== gfc_current_ns
)
5684 entry
= gfc_current_ns
->entries
;
5687 /* ...test if the symbol is a parameter of previous entries. */
5688 for (; entry
&& entry
->id
<= current_entry_id
; entry
= entry
->next
)
5689 for (formal
= entry
->sym
->formal
; formal
; formal
= formal
->next
)
5691 if (formal
->sym
&& sym
->name
== formal
->sym
->name
)
5698 /* If it has not been seen as a dummy, this is an error. */
5701 if (specification_expr
)
5702 gfc_error ("Variable %qs, used in a specification expression"
5703 ", is referenced at %L before the ENTRY statement "
5704 "in which it is a parameter",
5705 sym
->name
, &cs_base
->current
->loc
);
5707 gfc_error ("Variable %qs is used at %L before the ENTRY "
5708 "statement in which it is a parameter",
5709 sym
->name
, &cs_base
->current
->loc
);
5714 /* Now do the same check on the specification expressions. */
5715 saved_specification_expr
= specification_expr
;
5716 specification_expr
= true;
5717 if (sym
->ts
.type
== BT_CHARACTER
5718 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
5722 for (n
= 0; n
< sym
->as
->rank
; n
++)
5724 if (!gfc_resolve_expr (sym
->as
->lower
[n
]))
5726 if (!gfc_resolve_expr (sym
->as
->upper
[n
]))
5729 specification_expr
= saved_specification_expr
;
5732 /* Update the symbol's entry level. */
5733 sym
->entry_id
= current_entry_id
+ 1;
5736 /* If a symbol has been host_associated mark it. This is used latter,
5737 to identify if aliasing is possible via host association. */
5738 if (sym
->attr
.flavor
== FL_VARIABLE
5739 && gfc_current_ns
->parent
5740 && (gfc_current_ns
->parent
== sym
->ns
5741 || (gfc_current_ns
->parent
->parent
5742 && gfc_current_ns
->parent
->parent
== sym
->ns
)))
5743 sym
->attr
.host_assoc
= 1;
5745 if (gfc_current_ns
->proc_name
5746 && sym
->attr
.dimension
5747 && (sym
->ns
!= gfc_current_ns
5748 || sym
->attr
.use_assoc
5749 || sym
->attr
.in_common
))
5750 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
5753 if (t
&& !resolve_procedure_expression (e
))
5756 /* F2008, C617 and C1229. */
5757 if (!inquiry_argument
&& (e
->ts
.type
== BT_CLASS
|| e
->ts
.type
== BT_DERIVED
)
5758 && gfc_is_coindexed (e
))
5760 gfc_ref
*ref
, *ref2
= NULL
;
5762 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5764 if (ref
->type
== REF_COMPONENT
)
5766 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5770 for ( ; ref
; ref
= ref
->next
)
5771 if (ref
->type
== REF_COMPONENT
)
5774 /* Expression itself is not coindexed object. */
5775 if (ref
&& e
->ts
.type
== BT_CLASS
)
5777 gfc_error ("Polymorphic subobject of coindexed object at %L",
5782 /* Expression itself is coindexed object. */
5786 c
= ref2
? ref2
->u
.c
.component
: e
->symtree
->n
.sym
->components
;
5787 for ( ; c
; c
= c
->next
)
5788 if (c
->attr
.allocatable
&& c
->ts
.type
== BT_CLASS
)
5790 gfc_error ("Coindexed object with polymorphic allocatable "
5791 "subcomponent at %L", &e
->where
);
5799 expression_rank (e
);
5801 if (t
&& flag_coarray
== GFC_FCOARRAY_LIB
&& gfc_is_coindexed (e
))
5802 add_caf_get_intrinsic (e
);
5804 /* Simplify cases where access to a parameter array results in a
5805 single constant. Suppress errors since those will have been
5806 issued before, as warnings. */
5807 if (e
->rank
== 0 && sym
->as
&& sym
->attr
.flavor
== FL_PARAMETER
)
5809 gfc_push_suppress_errors ();
5810 gfc_simplify_expr (e
, 1);
5811 gfc_pop_suppress_errors ();
5818 /* Checks to see that the correct symbol has been host associated.
5819 The only situation where this arises is that in which a twice
5820 contained function is parsed after the host association is made.
5821 Therefore, on detecting this, change the symbol in the expression
5822 and convert the array reference into an actual arglist if the old
5823 symbol is a variable. */
5825 check_host_association (gfc_expr
*e
)
5827 gfc_symbol
*sym
, *old_sym
;
5831 gfc_actual_arglist
*arg
, *tail
= NULL
;
5832 bool retval
= e
->expr_type
== EXPR_FUNCTION
;
5834 /* If the expression is the result of substitution in
5835 interface.c(gfc_extend_expr) because there is no way in
5836 which the host association can be wrong. */
5837 if (e
->symtree
== NULL
5838 || e
->symtree
->n
.sym
== NULL
5839 || e
->user_operator
)
5842 old_sym
= e
->symtree
->n
.sym
;
5844 if (gfc_current_ns
->parent
5845 && old_sym
->ns
!= gfc_current_ns
)
5847 /* Use the 'USE' name so that renamed module symbols are
5848 correctly handled. */
5849 gfc_find_symbol (e
->symtree
->name
, gfc_current_ns
, 1, &sym
);
5851 if (sym
&& old_sym
!= sym
5852 && sym
->ts
.type
== old_sym
->ts
.type
5853 && sym
->attr
.flavor
== FL_PROCEDURE
5854 && sym
->attr
.contained
)
5856 /* Clear the shape, since it might not be valid. */
5857 gfc_free_shape (&e
->shape
, e
->rank
);
5859 /* Give the expression the right symtree! */
5860 gfc_find_sym_tree (e
->symtree
->name
, NULL
, 1, &st
);
5861 gcc_assert (st
!= NULL
);
5863 if (old_sym
->attr
.flavor
== FL_PROCEDURE
5864 || e
->expr_type
== EXPR_FUNCTION
)
5866 /* Original was function so point to the new symbol, since
5867 the actual argument list is already attached to the
5869 e
->value
.function
.esym
= NULL
;
5874 /* Original was variable so convert array references into
5875 an actual arglist. This does not need any checking now
5876 since resolve_function will take care of it. */
5877 e
->value
.function
.actual
= NULL
;
5878 e
->expr_type
= EXPR_FUNCTION
;
5881 /* Ambiguity will not arise if the array reference is not
5882 the last reference. */
5883 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5884 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
5887 gcc_assert (ref
->type
== REF_ARRAY
);
5889 /* Grab the start expressions from the array ref and
5890 copy them into actual arguments. */
5891 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
5893 arg
= gfc_get_actual_arglist ();
5894 arg
->expr
= gfc_copy_expr (ref
->u
.ar
.start
[n
]);
5895 if (e
->value
.function
.actual
== NULL
)
5896 tail
= e
->value
.function
.actual
= arg
;
5904 /* Dump the reference list and set the rank. */
5905 gfc_free_ref_list (e
->ref
);
5907 e
->rank
= sym
->as
? sym
->as
->rank
: 0;
5910 gfc_resolve_expr (e
);
5914 /* This might have changed! */
5915 return e
->expr_type
== EXPR_FUNCTION
;
5920 gfc_resolve_character_operator (gfc_expr
*e
)
5922 gfc_expr
*op1
= e
->value
.op
.op1
;
5923 gfc_expr
*op2
= e
->value
.op
.op2
;
5924 gfc_expr
*e1
= NULL
;
5925 gfc_expr
*e2
= NULL
;
5927 gcc_assert (e
->value
.op
.op
== INTRINSIC_CONCAT
);
5929 if (op1
->ts
.u
.cl
&& op1
->ts
.u
.cl
->length
)
5930 e1
= gfc_copy_expr (op1
->ts
.u
.cl
->length
);
5931 else if (op1
->expr_type
== EXPR_CONSTANT
)
5932 e1
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5933 op1
->value
.character
.length
);
5935 if (op2
->ts
.u
.cl
&& op2
->ts
.u
.cl
->length
)
5936 e2
= gfc_copy_expr (op2
->ts
.u
.cl
->length
);
5937 else if (op2
->expr_type
== EXPR_CONSTANT
)
5938 e2
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5939 op2
->value
.character
.length
);
5941 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5951 e
->ts
.u
.cl
->length
= gfc_add (e1
, e2
);
5952 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5953 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5954 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 0);
5955 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5961 /* Ensure that an character expression has a charlen and, if possible, a
5962 length expression. */
5965 fixup_charlen (gfc_expr
*e
)
5967 /* The cases fall through so that changes in expression type and the need
5968 for multiple fixes are picked up. In all circumstances, a charlen should
5969 be available for the middle end to hang a backend_decl on. */
5970 switch (e
->expr_type
)
5973 gfc_resolve_character_operator (e
);
5977 if (e
->expr_type
== EXPR_ARRAY
)
5978 gfc_resolve_character_array_constructor (e
);
5981 case EXPR_SUBSTRING
:
5982 if (!e
->ts
.u
.cl
&& e
->ref
)
5983 gfc_resolve_substring_charlen (e
);
5988 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5995 /* Update an actual argument to include the passed-object for type-bound
5996 procedures at the right position. */
5998 static gfc_actual_arglist
*
5999 update_arglist_pass (gfc_actual_arglist
* lst
, gfc_expr
* po
, unsigned argpos
,
6002 gcc_assert (argpos
> 0);
6006 gfc_actual_arglist
* result
;
6008 result
= gfc_get_actual_arglist ();
6012 result
->name
= name
;
6018 lst
->next
= update_arglist_pass (lst
->next
, po
, argpos
- 1, name
);
6020 lst
= update_arglist_pass (NULL
, po
, argpos
- 1, name
);
6025 /* Extract the passed-object from an EXPR_COMPCALL (a copy of it). */
6028 extract_compcall_passed_object (gfc_expr
* e
)
6032 if (e
->expr_type
== EXPR_UNKNOWN
)
6034 gfc_error ("Error in typebound call at %L",
6039 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6041 if (e
->value
.compcall
.base_object
)
6042 po
= gfc_copy_expr (e
->value
.compcall
.base_object
);
6045 po
= gfc_get_expr ();
6046 po
->expr_type
= EXPR_VARIABLE
;
6047 po
->symtree
= e
->symtree
;
6048 po
->ref
= gfc_copy_ref (e
->ref
);
6049 po
->where
= e
->where
;
6052 if (!gfc_resolve_expr (po
))
6059 /* Update the arglist of an EXPR_COMPCALL expression to include the
6063 update_compcall_arglist (gfc_expr
* e
)
6066 gfc_typebound_proc
* tbp
;
6068 tbp
= e
->value
.compcall
.tbp
;
6073 po
= extract_compcall_passed_object (e
);
6077 if (tbp
->nopass
|| e
->value
.compcall
.ignore_pass
)
6083 if (tbp
->pass_arg_num
<= 0)
6086 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6094 /* Extract the passed object from a PPC call (a copy of it). */
6097 extract_ppc_passed_object (gfc_expr
*e
)
6102 po
= gfc_get_expr ();
6103 po
->expr_type
= EXPR_VARIABLE
;
6104 po
->symtree
= e
->symtree
;
6105 po
->ref
= gfc_copy_ref (e
->ref
);
6106 po
->where
= e
->where
;
6108 /* Remove PPC reference. */
6110 while ((*ref
)->next
)
6111 ref
= &(*ref
)->next
;
6112 gfc_free_ref_list (*ref
);
6115 if (!gfc_resolve_expr (po
))
6122 /* Update the actual arglist of a procedure pointer component to include the
6126 update_ppc_arglist (gfc_expr
* e
)
6130 gfc_typebound_proc
* tb
;
6132 ppc
= gfc_get_proc_ptr_comp (e
);
6140 else if (tb
->nopass
)
6143 po
= extract_ppc_passed_object (e
);
6150 gfc_error ("Passed-object at %L must be scalar", &e
->where
);
6155 if (po
->ts
.type
== BT_DERIVED
&& po
->ts
.u
.derived
->attr
.abstract
)
6157 gfc_error ("Base object for procedure-pointer component call at %L is of"
6158 " ABSTRACT type %qs", &e
->where
, po
->ts
.u
.derived
->name
);
6162 gcc_assert (tb
->pass_arg_num
> 0);
6163 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6171 /* Check that the object a TBP is called on is valid, i.e. it must not be
6172 of ABSTRACT type (as in subobject%abstract_parent%tbp()). */
6175 check_typebound_baseobject (gfc_expr
* e
)
6178 bool return_value
= false;
6180 base
= extract_compcall_passed_object (e
);
6184 if (base
->ts
.type
!= BT_DERIVED
&& base
->ts
.type
!= BT_CLASS
)
6186 gfc_error ("Error in typebound call at %L", &e
->where
);
6190 if (base
->ts
.type
== BT_CLASS
&& !gfc_expr_attr (base
).class_ok
)
6194 if (base
->ts
.type
== BT_DERIVED
&& base
->ts
.u
.derived
->attr
.abstract
)
6196 gfc_error ("Base object for type-bound procedure call at %L is of"
6197 " ABSTRACT type %qs", &e
->where
, base
->ts
.u
.derived
->name
);
6201 /* F08:C1230. If the procedure called is NOPASS,
6202 the base object must be scalar. */
6203 if (e
->value
.compcall
.tbp
->nopass
&& base
->rank
!= 0)
6205 gfc_error ("Base object for NOPASS type-bound procedure call at %L must"
6206 " be scalar", &e
->where
);
6210 return_value
= true;
6213 gfc_free_expr (base
);
6214 return return_value
;
6218 /* Resolve a call to a type-bound procedure, either function or subroutine,
6219 statically from the data in an EXPR_COMPCALL expression. The adapted
6220 arglist and the target-procedure symtree are returned. */
6223 resolve_typebound_static (gfc_expr
* e
, gfc_symtree
** target
,
6224 gfc_actual_arglist
** actual
)
6226 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6227 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6229 /* Update the actual arglist for PASS. */
6230 if (!update_compcall_arglist (e
))
6233 *actual
= e
->value
.compcall
.actual
;
6234 *target
= e
->value
.compcall
.tbp
->u
.specific
;
6236 gfc_free_ref_list (e
->ref
);
6238 e
->value
.compcall
.actual
= NULL
;
6240 /* If we find a deferred typebound procedure, check for derived types
6241 that an overriding typebound procedure has not been missed. */
6242 if (e
->value
.compcall
.name
6243 && !e
->value
.compcall
.tbp
->non_overridable
6244 && e
->value
.compcall
.base_object
6245 && e
->value
.compcall
.base_object
->ts
.type
== BT_DERIVED
)
6248 gfc_symbol
*derived
;
6250 /* Use the derived type of the base_object. */
6251 derived
= e
->value
.compcall
.base_object
->ts
.u
.derived
;
6254 /* If necessary, go through the inheritance chain. */
6255 while (!st
&& derived
)
6257 /* Look for the typebound procedure 'name'. */
6258 if (derived
->f2k_derived
&& derived
->f2k_derived
->tb_sym_root
)
6259 st
= gfc_find_symtree (derived
->f2k_derived
->tb_sym_root
,
6260 e
->value
.compcall
.name
);
6262 derived
= gfc_get_derived_super_type (derived
);
6265 /* Now find the specific name in the derived type namespace. */
6266 if (st
&& st
->n
.tb
&& st
->n
.tb
->u
.specific
)
6267 gfc_find_sym_tree (st
->n
.tb
->u
.specific
->name
,
6268 derived
->ns
, 1, &st
);
6276 /* Get the ultimate declared type from an expression. In addition,
6277 return the last class/derived type reference and the copy of the
6278 reference list. If check_types is set true, derived types are
6279 identified as well as class references. */
6281 get_declared_from_expr (gfc_ref
**class_ref
, gfc_ref
**new_ref
,
6282 gfc_expr
*e
, bool check_types
)
6284 gfc_symbol
*declared
;
6291 *new_ref
= gfc_copy_ref (e
->ref
);
6293 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
6295 if (ref
->type
!= REF_COMPONENT
)
6298 if ((ref
->u
.c
.component
->ts
.type
== BT_CLASS
6299 || (check_types
&& gfc_bt_struct (ref
->u
.c
.component
->ts
.type
)))
6300 && ref
->u
.c
.component
->attr
.flavor
!= FL_PROCEDURE
)
6302 declared
= ref
->u
.c
.component
->ts
.u
.derived
;
6308 if (declared
== NULL
)
6309 declared
= e
->symtree
->n
.sym
->ts
.u
.derived
;
6315 /* Given an EXPR_COMPCALL calling a GENERIC typebound procedure, figure out
6316 which of the specific bindings (if any) matches the arglist and transform
6317 the expression into a call of that binding. */
6320 resolve_typebound_generic_call (gfc_expr
* e
, const char **name
)
6322 gfc_typebound_proc
* genproc
;
6323 const char* genname
;
6325 gfc_symbol
*derived
;
6327 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6328 genname
= e
->value
.compcall
.name
;
6329 genproc
= e
->value
.compcall
.tbp
;
6331 if (!genproc
->is_generic
)
6334 /* Try the bindings on this type and in the inheritance hierarchy. */
6335 for (; genproc
; genproc
= genproc
->overridden
)
6339 gcc_assert (genproc
->is_generic
);
6340 for (g
= genproc
->u
.generic
; g
; g
= g
->next
)
6343 gfc_actual_arglist
* args
;
6346 gcc_assert (g
->specific
);
6348 if (g
->specific
->error
)
6351 target
= g
->specific
->u
.specific
->n
.sym
;
6353 /* Get the right arglist by handling PASS/NOPASS. */
6354 args
= gfc_copy_actual_arglist (e
->value
.compcall
.actual
);
6355 if (!g
->specific
->nopass
)
6358 po
= extract_compcall_passed_object (e
);
6361 gfc_free_actual_arglist (args
);
6365 gcc_assert (g
->specific
->pass_arg_num
> 0);
6366 gcc_assert (!g
->specific
->error
);
6367 args
= update_arglist_pass (args
, po
, g
->specific
->pass_arg_num
,
6368 g
->specific
->pass_arg
);
6370 resolve_actual_arglist (args
, target
->attr
.proc
,
6371 is_external_proc (target
)
6372 && gfc_sym_get_dummy_args (target
) == NULL
);
6374 /* Check if this arglist matches the formal. */
6375 matches
= gfc_arglist_matches_symbol (&args
, target
);
6377 /* Clean up and break out of the loop if we've found it. */
6378 gfc_free_actual_arglist (args
);
6381 e
->value
.compcall
.tbp
= g
->specific
;
6382 genname
= g
->specific_st
->name
;
6383 /* Pass along the name for CLASS methods, where the vtab
6384 procedure pointer component has to be referenced. */
6392 /* Nothing matching found! */
6393 gfc_error ("Found no matching specific binding for the call to the GENERIC"
6394 " %qs at %L", genname
, &e
->where
);
6398 /* Make sure that we have the right specific instance for the name. */
6399 derived
= get_declared_from_expr (NULL
, NULL
, e
, true);
6401 st
= gfc_find_typebound_proc (derived
, NULL
, genname
, true, &e
->where
);
6403 e
->value
.compcall
.tbp
= st
->n
.tb
;
6409 /* Resolve a call to a type-bound subroutine. */
6412 resolve_typebound_call (gfc_code
* c
, const char **name
, bool *overridable
)
6414 gfc_actual_arglist
* newactual
;
6415 gfc_symtree
* target
;
6417 /* Check that's really a SUBROUTINE. */
6418 if (!c
->expr1
->value
.compcall
.tbp
->subroutine
)
6420 if (!c
->expr1
->value
.compcall
.tbp
->is_generic
6421 && c
->expr1
->value
.compcall
.tbp
->u
.specific
6422 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
6423 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
->attr
.subroutine
)
6424 c
->expr1
->value
.compcall
.tbp
->subroutine
= 1;
6427 gfc_error ("%qs at %L should be a SUBROUTINE",
6428 c
->expr1
->value
.compcall
.name
, &c
->loc
);
6433 if (!check_typebound_baseobject (c
->expr1
))
6436 /* Pass along the name for CLASS methods, where the vtab
6437 procedure pointer component has to be referenced. */
6439 *name
= c
->expr1
->value
.compcall
.name
;
6441 if (!resolve_typebound_generic_call (c
->expr1
, name
))
6444 /* Pass along the NON_OVERRIDABLE attribute of the specific TBP. */
6446 *overridable
= !c
->expr1
->value
.compcall
.tbp
->non_overridable
;
6448 /* Transform into an ordinary EXEC_CALL for now. */
6450 if (!resolve_typebound_static (c
->expr1
, &target
, &newactual
))
6453 c
->ext
.actual
= newactual
;
6454 c
->symtree
= target
;
6455 c
->op
= (c
->expr1
->value
.compcall
.assign
? EXEC_ASSIGN_CALL
: EXEC_CALL
);
6457 gcc_assert (!c
->expr1
->ref
&& !c
->expr1
->value
.compcall
.actual
);
6459 gfc_free_expr (c
->expr1
);
6460 c
->expr1
= gfc_get_expr ();
6461 c
->expr1
->expr_type
= EXPR_FUNCTION
;
6462 c
->expr1
->symtree
= target
;
6463 c
->expr1
->where
= c
->loc
;
6465 return resolve_call (c
);
6469 /* Resolve a component-call expression. */
6471 resolve_compcall (gfc_expr
* e
, const char **name
)
6473 gfc_actual_arglist
* newactual
;
6474 gfc_symtree
* target
;
6476 /* Check that's really a FUNCTION. */
6477 if (!e
->value
.compcall
.tbp
->function
)
6479 gfc_error ("%qs at %L should be a FUNCTION",
6480 e
->value
.compcall
.name
, &e
->where
);
6485 /* These must not be assign-calls! */
6486 gcc_assert (!e
->value
.compcall
.assign
);
6488 if (!check_typebound_baseobject (e
))
6491 /* Pass along the name for CLASS methods, where the vtab
6492 procedure pointer component has to be referenced. */
6494 *name
= e
->value
.compcall
.name
;
6496 if (!resolve_typebound_generic_call (e
, name
))
6498 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6500 /* Take the rank from the function's symbol. */
6501 if (e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
)
6502 e
->rank
= e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
->rank
;
6504 /* For now, we simply transform it into an EXPR_FUNCTION call with the same
6505 arglist to the TBP's binding target. */
6507 if (!resolve_typebound_static (e
, &target
, &newactual
))
6510 e
->value
.function
.actual
= newactual
;
6511 e
->value
.function
.name
= NULL
;
6512 e
->value
.function
.esym
= target
->n
.sym
;
6513 e
->value
.function
.isym
= NULL
;
6514 e
->symtree
= target
;
6515 e
->ts
= target
->n
.sym
->ts
;
6516 e
->expr_type
= EXPR_FUNCTION
;
6518 /* Resolution is not necessary if this is a class subroutine; this
6519 function only has to identify the specific proc. Resolution of
6520 the call will be done next in resolve_typebound_call. */
6521 return gfc_resolve_expr (e
);
6525 static bool resolve_fl_derived (gfc_symbol
*sym
);
6528 /* Resolve a typebound function, or 'method'. First separate all
6529 the non-CLASS references by calling resolve_compcall directly. */
6532 resolve_typebound_function (gfc_expr
* e
)
6534 gfc_symbol
*declared
;
6546 /* Deal with typebound operators for CLASS objects. */
6547 expr
= e
->value
.compcall
.base_object
;
6548 overridable
= !e
->value
.compcall
.tbp
->non_overridable
;
6549 if (expr
&& expr
->ts
.type
== BT_CLASS
&& e
->value
.compcall
.name
)
6551 /* If the base_object is not a variable, the corresponding actual
6552 argument expression must be stored in e->base_expression so
6553 that the corresponding tree temporary can be used as the base
6554 object in gfc_conv_procedure_call. */
6555 if (expr
->expr_type
!= EXPR_VARIABLE
)
6557 gfc_actual_arglist
*args
;
6559 for (args
= e
->value
.function
.actual
; args
; args
= args
->next
)
6561 if (expr
== args
->expr
)
6566 /* Since the typebound operators are generic, we have to ensure
6567 that any delays in resolution are corrected and that the vtab
6570 declared
= ts
.u
.derived
;
6571 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6572 if (c
->ts
.u
.derived
== NULL
)
6573 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6575 if (!resolve_compcall (e
, &name
))
6578 /* Use the generic name if it is there. */
6579 name
= name
? name
: e
->value
.function
.esym
->name
;
6580 e
->symtree
= expr
->symtree
;
6581 e
->ref
= gfc_copy_ref (expr
->ref
);
6582 get_declared_from_expr (&class_ref
, NULL
, e
, false);
6584 /* Trim away the extraneous references that emerge from nested
6585 use of interface.c (extend_expr). */
6586 if (class_ref
&& class_ref
->next
)
6588 gfc_free_ref_list (class_ref
->next
);
6589 class_ref
->next
= NULL
;
6591 else if (e
->ref
&& !class_ref
&& expr
->ts
.type
!= BT_CLASS
)
6593 gfc_free_ref_list (e
->ref
);
6597 gfc_add_vptr_component (e
);
6598 gfc_add_component_ref (e
, name
);
6599 e
->value
.function
.esym
= NULL
;
6600 if (expr
->expr_type
!= EXPR_VARIABLE
)
6601 e
->base_expr
= expr
;
6606 return resolve_compcall (e
, NULL
);
6608 if (!resolve_ref (e
))
6611 /* Get the CLASS declared type. */
6612 declared
= get_declared_from_expr (&class_ref
, &new_ref
, e
, true);
6614 if (!resolve_fl_derived (declared
))
6617 /* Weed out cases of the ultimate component being a derived type. */
6618 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6619 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6621 gfc_free_ref_list (new_ref
);
6622 return resolve_compcall (e
, NULL
);
6625 c
= gfc_find_component (declared
, "_data", true, true, NULL
);
6627 /* Treat the call as if it is a typebound procedure, in order to roll
6628 out the correct name for the specific function. */
6629 if (!resolve_compcall (e
, &name
))
6631 gfc_free_ref_list (new_ref
);
6638 /* Convert the expression to a procedure pointer component call. */
6639 e
->value
.function
.esym
= NULL
;
6645 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6646 gfc_add_vptr_component (e
);
6647 gfc_add_component_ref (e
, name
);
6649 /* Recover the typespec for the expression. This is really only
6650 necessary for generic procedures, where the additional call
6651 to gfc_add_component_ref seems to throw the collection of the
6652 correct typespec. */
6656 gfc_free_ref_list (new_ref
);
6661 /* Resolve a typebound subroutine, or 'method'. First separate all
6662 the non-CLASS references by calling resolve_typebound_call
6666 resolve_typebound_subroutine (gfc_code
*code
)
6668 gfc_symbol
*declared
;
6678 st
= code
->expr1
->symtree
;
6680 /* Deal with typebound operators for CLASS objects. */
6681 expr
= code
->expr1
->value
.compcall
.base_object
;
6682 overridable
= !code
->expr1
->value
.compcall
.tbp
->non_overridable
;
6683 if (expr
&& expr
->ts
.type
== BT_CLASS
&& code
->expr1
->value
.compcall
.name
)
6685 /* If the base_object is not a variable, the corresponding actual
6686 argument expression must be stored in e->base_expression so
6687 that the corresponding tree temporary can be used as the base
6688 object in gfc_conv_procedure_call. */
6689 if (expr
->expr_type
!= EXPR_VARIABLE
)
6691 gfc_actual_arglist
*args
;
6693 args
= code
->expr1
->value
.function
.actual
;
6694 for (; args
; args
= args
->next
)
6695 if (expr
== args
->expr
)
6699 /* Since the typebound operators are generic, we have to ensure
6700 that any delays in resolution are corrected and that the vtab
6702 declared
= expr
->ts
.u
.derived
;
6703 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6704 if (c
->ts
.u
.derived
== NULL
)
6705 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6707 if (!resolve_typebound_call (code
, &name
, NULL
))
6710 /* Use the generic name if it is there. */
6711 name
= name
? name
: code
->expr1
->value
.function
.esym
->name
;
6712 code
->expr1
->symtree
= expr
->symtree
;
6713 code
->expr1
->ref
= gfc_copy_ref (expr
->ref
);
6715 /* Trim away the extraneous references that emerge from nested
6716 use of interface.c (extend_expr). */
6717 get_declared_from_expr (&class_ref
, NULL
, code
->expr1
, false);
6718 if (class_ref
&& class_ref
->next
)
6720 gfc_free_ref_list (class_ref
->next
);
6721 class_ref
->next
= NULL
;
6723 else if (code
->expr1
->ref
&& !class_ref
)
6725 gfc_free_ref_list (code
->expr1
->ref
);
6726 code
->expr1
->ref
= NULL
;
6729 /* Now use the procedure in the vtable. */
6730 gfc_add_vptr_component (code
->expr1
);
6731 gfc_add_component_ref (code
->expr1
, name
);
6732 code
->expr1
->value
.function
.esym
= NULL
;
6733 if (expr
->expr_type
!= EXPR_VARIABLE
)
6734 code
->expr1
->base_expr
= expr
;
6739 return resolve_typebound_call (code
, NULL
, NULL
);
6741 if (!resolve_ref (code
->expr1
))
6744 /* Get the CLASS declared type. */
6745 get_declared_from_expr (&class_ref
, &new_ref
, code
->expr1
, true);
6747 /* Weed out cases of the ultimate component being a derived type. */
6748 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6749 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6751 gfc_free_ref_list (new_ref
);
6752 return resolve_typebound_call (code
, NULL
, NULL
);
6755 if (!resolve_typebound_call (code
, &name
, &overridable
))
6757 gfc_free_ref_list (new_ref
);
6760 ts
= code
->expr1
->ts
;
6764 /* Convert the expression to a procedure pointer component call. */
6765 code
->expr1
->value
.function
.esym
= NULL
;
6766 code
->expr1
->symtree
= st
;
6769 code
->expr1
->ref
= new_ref
;
6771 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6772 gfc_add_vptr_component (code
->expr1
);
6773 gfc_add_component_ref (code
->expr1
, name
);
6775 /* Recover the typespec for the expression. This is really only
6776 necessary for generic procedures, where the additional call
6777 to gfc_add_component_ref seems to throw the collection of the
6778 correct typespec. */
6779 code
->expr1
->ts
= ts
;
6782 gfc_free_ref_list (new_ref
);
6788 /* Resolve a CALL to a Procedure Pointer Component (Subroutine). */
6791 resolve_ppc_call (gfc_code
* c
)
6793 gfc_component
*comp
;
6795 comp
= gfc_get_proc_ptr_comp (c
->expr1
);
6796 gcc_assert (comp
!= NULL
);
6798 c
->resolved_sym
= c
->expr1
->symtree
->n
.sym
;
6799 c
->expr1
->expr_type
= EXPR_VARIABLE
;
6801 if (!comp
->attr
.subroutine
)
6802 gfc_add_subroutine (&comp
->attr
, comp
->name
, &c
->expr1
->where
);
6804 if (!resolve_ref (c
->expr1
))
6807 if (!update_ppc_arglist (c
->expr1
))
6810 c
->ext
.actual
= c
->expr1
->value
.compcall
.actual
;
6812 if (!resolve_actual_arglist (c
->ext
.actual
, comp
->attr
.proc
,
6813 !(comp
->ts
.interface
6814 && comp
->ts
.interface
->formal
)))
6817 if (!pure_subroutine (comp
->ts
.interface
, comp
->name
, &c
->expr1
->where
))
6820 gfc_ppc_use (comp
, &c
->expr1
->value
.compcall
.actual
, &c
->expr1
->where
);
6826 /* Resolve a Function Call to a Procedure Pointer Component (Function). */
6829 resolve_expr_ppc (gfc_expr
* e
)
6831 gfc_component
*comp
;
6833 comp
= gfc_get_proc_ptr_comp (e
);
6834 gcc_assert (comp
!= NULL
);
6836 /* Convert to EXPR_FUNCTION. */
6837 e
->expr_type
= EXPR_FUNCTION
;
6838 e
->value
.function
.isym
= NULL
;
6839 e
->value
.function
.actual
= e
->value
.compcall
.actual
;
6841 if (comp
->as
!= NULL
)
6842 e
->rank
= comp
->as
->rank
;
6844 if (!comp
->attr
.function
)
6845 gfc_add_function (&comp
->attr
, comp
->name
, &e
->where
);
6847 if (!resolve_ref (e
))
6850 if (!resolve_actual_arglist (e
->value
.function
.actual
, comp
->attr
.proc
,
6851 !(comp
->ts
.interface
6852 && comp
->ts
.interface
->formal
)))
6855 if (!update_ppc_arglist (e
))
6858 if (!check_pure_function(e
))
6861 gfc_ppc_use (comp
, &e
->value
.compcall
.actual
, &e
->where
);
6868 gfc_is_expandable_expr (gfc_expr
*e
)
6870 gfc_constructor
*con
;
6872 if (e
->expr_type
== EXPR_ARRAY
)
6874 /* Traverse the constructor looking for variables that are flavor
6875 parameter. Parameters must be expanded since they are fully used at
6877 con
= gfc_constructor_first (e
->value
.constructor
);
6878 for (; con
; con
= gfc_constructor_next (con
))
6880 if (con
->expr
->expr_type
== EXPR_VARIABLE
6881 && con
->expr
->symtree
6882 && (con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
6883 || con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_VARIABLE
))
6885 if (con
->expr
->expr_type
== EXPR_ARRAY
6886 && gfc_is_expandable_expr (con
->expr
))
6895 /* Sometimes variables in specification expressions of the result
6896 of module procedures in submodules wind up not being the 'real'
6897 dummy. Find this, if possible, in the namespace of the first
6901 fixup_unique_dummy (gfc_expr
*e
)
6903 gfc_symtree
*st
= NULL
;
6904 gfc_symbol
*s
= NULL
;
6906 if (e
->symtree
->n
.sym
->ns
->proc_name
6907 && e
->symtree
->n
.sym
->ns
->proc_name
->formal
)
6908 s
= e
->symtree
->n
.sym
->ns
->proc_name
->formal
->sym
;
6911 st
= gfc_find_symtree (s
->ns
->sym_root
, e
->symtree
->n
.sym
->name
);
6914 && st
->n
.sym
!= NULL
6915 && st
->n
.sym
->attr
.dummy
)
6919 /* Resolve an expression. That is, make sure that types of operands agree
6920 with their operators, intrinsic operators are converted to function calls
6921 for overloaded types and unresolved function references are resolved. */
6924 gfc_resolve_expr (gfc_expr
*e
)
6927 bool inquiry_save
, actual_arg_save
, first_actual_arg_save
;
6929 if (e
== NULL
|| e
->do_not_resolve_again
)
6932 /* inquiry_argument only applies to variables. */
6933 inquiry_save
= inquiry_argument
;
6934 actual_arg_save
= actual_arg
;
6935 first_actual_arg_save
= first_actual_arg
;
6937 if (e
->expr_type
!= EXPR_VARIABLE
)
6939 inquiry_argument
= false;
6941 first_actual_arg
= false;
6943 else if (e
->symtree
!= NULL
6944 && *e
->symtree
->name
== '@'
6945 && e
->symtree
->n
.sym
->attr
.dummy
)
6947 /* Deal with submodule specification expressions that are not
6948 found to be referenced in module.c(read_cleanup). */
6949 fixup_unique_dummy (e
);
6952 switch (e
->expr_type
)
6955 t
= resolve_operator (e
);
6961 if (check_host_association (e
))
6962 t
= resolve_function (e
);
6964 t
= resolve_variable (e
);
6966 if (e
->ts
.type
== BT_CHARACTER
&& e
->ts
.u
.cl
== NULL
&& e
->ref
6967 && e
->ref
->type
!= REF_SUBSTRING
)
6968 gfc_resolve_substring_charlen (e
);
6973 t
= resolve_typebound_function (e
);
6976 case EXPR_SUBSTRING
:
6977 t
= resolve_ref (e
);
6986 t
= resolve_expr_ppc (e
);
6991 if (!resolve_ref (e
))
6994 t
= gfc_resolve_array_constructor (e
);
6995 /* Also try to expand a constructor. */
6998 expression_rank (e
);
6999 if (gfc_is_constant_expr (e
) || gfc_is_expandable_expr (e
))
7000 gfc_expand_constructor (e
, false);
7003 /* This provides the opportunity for the length of constructors with
7004 character valued function elements to propagate the string length
7005 to the expression. */
7006 if (t
&& e
->ts
.type
== BT_CHARACTER
)
7008 /* For efficiency, we call gfc_expand_constructor for BT_CHARACTER
7009 here rather then add a duplicate test for it above. */
7010 gfc_expand_constructor (e
, false);
7011 t
= gfc_resolve_character_array_constructor (e
);
7016 case EXPR_STRUCTURE
:
7017 t
= resolve_ref (e
);
7021 t
= resolve_structure_cons (e
, 0);
7025 t
= gfc_simplify_expr (e
, 0);
7029 gfc_internal_error ("gfc_resolve_expr(): Bad expression type");
7032 if (e
->ts
.type
== BT_CHARACTER
&& t
&& !e
->ts
.u
.cl
)
7035 inquiry_argument
= inquiry_save
;
7036 actual_arg
= actual_arg_save
;
7037 first_actual_arg
= first_actual_arg_save
;
7039 /* For some reason, resolving these expressions a second time mangles
7040 the typespec of the expression itself. */
7041 if (t
&& e
->expr_type
== EXPR_VARIABLE
7042 && e
->symtree
->n
.sym
->attr
.select_rank_temporary
7043 && UNLIMITED_POLY (e
->symtree
->n
.sym
))
7044 e
->do_not_resolve_again
= 1;
7050 /* Resolve an expression from an iterator. They must be scalar and have
7051 INTEGER or (optionally) REAL type. */
7054 gfc_resolve_iterator_expr (gfc_expr
*expr
, bool real_ok
,
7055 const char *name_msgid
)
7057 if (!gfc_resolve_expr (expr
))
7060 if (expr
->rank
!= 0)
7062 gfc_error ("%s at %L must be a scalar", _(name_msgid
), &expr
->where
);
7066 if (expr
->ts
.type
!= BT_INTEGER
)
7068 if (expr
->ts
.type
== BT_REAL
)
7071 return gfc_notify_std (GFC_STD_F95_DEL
,
7072 "%s at %L must be integer",
7073 _(name_msgid
), &expr
->where
);
7076 gfc_error ("%s at %L must be INTEGER", _(name_msgid
),
7083 gfc_error ("%s at %L must be INTEGER", _(name_msgid
), &expr
->where
);
7091 /* Resolve the expressions in an iterator structure. If REAL_OK is
7092 false allow only INTEGER type iterators, otherwise allow REAL types.
7093 Set own_scope to true for ac-implied-do and data-implied-do as those
7094 have a separate scope such that, e.g., a INTENT(IN) doesn't apply. */
7097 gfc_resolve_iterator (gfc_iterator
*iter
, bool real_ok
, bool own_scope
)
7099 if (!gfc_resolve_iterator_expr (iter
->var
, real_ok
, "Loop variable"))
7102 if (!gfc_check_vardef_context (iter
->var
, false, false, own_scope
,
7103 _("iterator variable")))
7106 if (!gfc_resolve_iterator_expr (iter
->start
, real_ok
,
7107 "Start expression in DO loop"))
7110 if (!gfc_resolve_iterator_expr (iter
->end
, real_ok
,
7111 "End expression in DO loop"))
7114 if (!gfc_resolve_iterator_expr (iter
->step
, real_ok
,
7115 "Step expression in DO loop"))
7118 /* Convert start, end, and step to the same type as var. */
7119 if (iter
->start
->ts
.kind
!= iter
->var
->ts
.kind
7120 || iter
->start
->ts
.type
!= iter
->var
->ts
.type
)
7121 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7123 if (iter
->end
->ts
.kind
!= iter
->var
->ts
.kind
7124 || iter
->end
->ts
.type
!= iter
->var
->ts
.type
)
7125 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7127 if (iter
->step
->ts
.kind
!= iter
->var
->ts
.kind
7128 || iter
->step
->ts
.type
!= iter
->var
->ts
.type
)
7129 gfc_convert_type (iter
->step
, &iter
->var
->ts
, 1);
7131 if (iter
->step
->expr_type
== EXPR_CONSTANT
)
7133 if ((iter
->step
->ts
.type
== BT_INTEGER
7134 && mpz_cmp_ui (iter
->step
->value
.integer
, 0) == 0)
7135 || (iter
->step
->ts
.type
== BT_REAL
7136 && mpfr_sgn (iter
->step
->value
.real
) == 0))
7138 gfc_error ("Step expression in DO loop at %L cannot be zero",
7139 &iter
->step
->where
);
7144 if (iter
->start
->expr_type
== EXPR_CONSTANT
7145 && iter
->end
->expr_type
== EXPR_CONSTANT
7146 && iter
->step
->expr_type
== EXPR_CONSTANT
)
7149 if (iter
->start
->ts
.type
== BT_INTEGER
)
7151 sgn
= mpz_cmp_ui (iter
->step
->value
.integer
, 0);
7152 cmp
= mpz_cmp (iter
->end
->value
.integer
, iter
->start
->value
.integer
);
7156 sgn
= mpfr_sgn (iter
->step
->value
.real
);
7157 cmp
= mpfr_cmp (iter
->end
->value
.real
, iter
->start
->value
.real
);
7159 if (warn_zerotrip
&& ((sgn
> 0 && cmp
< 0) || (sgn
< 0 && cmp
> 0)))
7160 gfc_warning (OPT_Wzerotrip
,
7161 "DO loop at %L will be executed zero times",
7162 &iter
->step
->where
);
7165 if (iter
->end
->expr_type
== EXPR_CONSTANT
7166 && iter
->end
->ts
.type
== BT_INTEGER
7167 && iter
->step
->expr_type
== EXPR_CONSTANT
7168 && iter
->step
->ts
.type
== BT_INTEGER
7169 && (mpz_cmp_si (iter
->step
->value
.integer
, -1L) == 0
7170 || mpz_cmp_si (iter
->step
->value
.integer
, 1L) == 0))
7172 bool is_step_positive
= mpz_cmp_ui (iter
->step
->value
.integer
, 1) == 0;
7173 int k
= gfc_validate_kind (BT_INTEGER
, iter
->end
->ts
.kind
, false);
7175 if (is_step_positive
7176 && mpz_cmp (iter
->end
->value
.integer
, gfc_integer_kinds
[k
].huge
) == 0)
7177 gfc_warning (OPT_Wundefined_do_loop
,
7178 "DO loop at %L is undefined as it overflows",
7179 &iter
->step
->where
);
7180 else if (!is_step_positive
7181 && mpz_cmp (iter
->end
->value
.integer
,
7182 gfc_integer_kinds
[k
].min_int
) == 0)
7183 gfc_warning (OPT_Wundefined_do_loop
,
7184 "DO loop at %L is undefined as it underflows",
7185 &iter
->step
->where
);
7192 /* Traversal function for find_forall_index. f == 2 signals that
7193 that variable itself is not to be checked - only the references. */
7196 forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int *f
)
7198 if (expr
->expr_type
!= EXPR_VARIABLE
)
7201 /* A scalar assignment */
7202 if (!expr
->ref
|| *f
== 1)
7204 if (expr
->symtree
->n
.sym
== sym
)
7216 /* Check whether the FORALL index appears in the expression or not.
7217 Returns true if SYM is found in EXPR. */
7220 find_forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int f
)
7222 if (gfc_traverse_expr (expr
, sym
, forall_index
, f
))
7229 /* Resolve a list of FORALL iterators. The FORALL index-name is constrained
7230 to be a scalar INTEGER variable. The subscripts and stride are scalar
7231 INTEGERs, and if stride is a constant it must be nonzero.
7232 Furthermore "A subscript or stride in a forall-triplet-spec shall
7233 not contain a reference to any index-name in the
7234 forall-triplet-spec-list in which it appears." (7.5.4.1) */
7237 resolve_forall_iterators (gfc_forall_iterator
*it
)
7239 gfc_forall_iterator
*iter
, *iter2
;
7241 for (iter
= it
; iter
; iter
= iter
->next
)
7243 if (gfc_resolve_expr (iter
->var
)
7244 && (iter
->var
->ts
.type
!= BT_INTEGER
|| iter
->var
->rank
!= 0))
7245 gfc_error ("FORALL index-name at %L must be a scalar INTEGER",
7248 if (gfc_resolve_expr (iter
->start
)
7249 && (iter
->start
->ts
.type
!= BT_INTEGER
|| iter
->start
->rank
!= 0))
7250 gfc_error ("FORALL start expression at %L must be a scalar INTEGER",
7251 &iter
->start
->where
);
7252 if (iter
->var
->ts
.kind
!= iter
->start
->ts
.kind
)
7253 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7255 if (gfc_resolve_expr (iter
->end
)
7256 && (iter
->end
->ts
.type
!= BT_INTEGER
|| iter
->end
->rank
!= 0))
7257 gfc_error ("FORALL end expression at %L must be a scalar INTEGER",
7259 if (iter
->var
->ts
.kind
!= iter
->end
->ts
.kind
)
7260 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7262 if (gfc_resolve_expr (iter
->stride
))
7264 if (iter
->stride
->ts
.type
!= BT_INTEGER
|| iter
->stride
->rank
!= 0)
7265 gfc_error ("FORALL stride expression at %L must be a scalar %s",
7266 &iter
->stride
->where
, "INTEGER");
7268 if (iter
->stride
->expr_type
== EXPR_CONSTANT
7269 && mpz_cmp_ui (iter
->stride
->value
.integer
, 0) == 0)
7270 gfc_error ("FORALL stride expression at %L cannot be zero",
7271 &iter
->stride
->where
);
7273 if (iter
->var
->ts
.kind
!= iter
->stride
->ts
.kind
)
7274 gfc_convert_type (iter
->stride
, &iter
->var
->ts
, 1);
7277 for (iter
= it
; iter
; iter
= iter
->next
)
7278 for (iter2
= iter
; iter2
; iter2
= iter2
->next
)
7280 if (find_forall_index (iter2
->start
, iter
->var
->symtree
->n
.sym
, 0)
7281 || find_forall_index (iter2
->end
, iter
->var
->symtree
->n
.sym
, 0)
7282 || find_forall_index (iter2
->stride
, iter
->var
->symtree
->n
.sym
, 0))
7283 gfc_error ("FORALL index %qs may not appear in triplet "
7284 "specification at %L", iter
->var
->symtree
->name
,
7285 &iter2
->start
->where
);
7290 /* Given a pointer to a symbol that is a derived type, see if it's
7291 inaccessible, i.e. if it's defined in another module and the components are
7292 PRIVATE. The search is recursive if necessary. Returns zero if no
7293 inaccessible components are found, nonzero otherwise. */
7296 derived_inaccessible (gfc_symbol
*sym
)
7300 if (sym
->attr
.use_assoc
&& sym
->attr
.private_comp
)
7303 for (c
= sym
->components
; c
; c
= c
->next
)
7305 /* Prevent an infinite loop through this function. */
7306 if (c
->ts
.type
== BT_DERIVED
&& c
->attr
.pointer
7307 && sym
== c
->ts
.u
.derived
)
7310 if (c
->ts
.type
== BT_DERIVED
&& derived_inaccessible (c
->ts
.u
.derived
))
7318 /* Resolve the argument of a deallocate expression. The expression must be
7319 a pointer or a full array. */
7322 resolve_deallocate_expr (gfc_expr
*e
)
7324 symbol_attribute attr
;
7325 int allocatable
, pointer
;
7331 if (!gfc_resolve_expr (e
))
7334 if (e
->expr_type
!= EXPR_VARIABLE
)
7337 sym
= e
->symtree
->n
.sym
;
7338 unlimited
= UNLIMITED_POLY(sym
);
7340 if (sym
->ts
.type
== BT_CLASS
)
7342 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7343 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7347 allocatable
= sym
->attr
.allocatable
;
7348 pointer
= sym
->attr
.pointer
;
7350 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7355 if (ref
->u
.ar
.type
!= AR_FULL
7356 && !(ref
->u
.ar
.type
== AR_ELEMENT
&& ref
->u
.ar
.as
->rank
== 0
7357 && ref
->u
.ar
.codimen
&& gfc_ref_this_image (ref
)))
7362 c
= ref
->u
.c
.component
;
7363 if (c
->ts
.type
== BT_CLASS
)
7365 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7366 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7370 allocatable
= c
->attr
.allocatable
;
7371 pointer
= c
->attr
.pointer
;
7382 attr
= gfc_expr_attr (e
);
7384 if (allocatable
== 0 && attr
.pointer
== 0 && !unlimited
)
7387 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7393 if (gfc_is_coindexed (e
))
7395 gfc_error ("Coindexed allocatable object at %L", &e
->where
);
7400 && !gfc_check_vardef_context (e
, true, true, false,
7401 _("DEALLOCATE object")))
7403 if (!gfc_check_vardef_context (e
, false, true, false,
7404 _("DEALLOCATE object")))
7411 /* Returns true if the expression e contains a reference to the symbol sym. */
7413 sym_in_expr (gfc_expr
*e
, gfc_symbol
*sym
, int *f ATTRIBUTE_UNUSED
)
7415 if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
== sym
)
7422 gfc_find_sym_in_expr (gfc_symbol
*sym
, gfc_expr
*e
)
7424 return gfc_traverse_expr (e
, sym
, sym_in_expr
, 0);
7428 /* Given the expression node e for an allocatable/pointer of derived type to be
7429 allocated, get the expression node to be initialized afterwards (needed for
7430 derived types with default initializers, and derived types with allocatable
7431 components that need nullification.) */
7434 gfc_expr_to_initialize (gfc_expr
*e
)
7440 result
= gfc_copy_expr (e
);
7442 /* Change the last array reference from AR_ELEMENT to AR_FULL. */
7443 for (ref
= result
->ref
; ref
; ref
= ref
->next
)
7444 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
7446 if (ref
->u
.ar
.dimen
== 0
7447 && ref
->u
.ar
.as
&& ref
->u
.ar
.as
->corank
)
7450 ref
->u
.ar
.type
= AR_FULL
;
7452 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
7453 ref
->u
.ar
.start
[i
] = ref
->u
.ar
.end
[i
] = ref
->u
.ar
.stride
[i
] = NULL
;
7458 gfc_free_shape (&result
->shape
, result
->rank
);
7460 /* Recalculate rank, shape, etc. */
7461 gfc_resolve_expr (result
);
7466 /* If the last ref of an expression is an array ref, return a copy of the
7467 expression with that one removed. Otherwise, a copy of the original
7468 expression. This is used for allocate-expressions and pointer assignment
7469 LHS, where there may be an array specification that needs to be stripped
7470 off when using gfc_check_vardef_context. */
7473 remove_last_array_ref (gfc_expr
* e
)
7478 e2
= gfc_copy_expr (e
);
7479 for (r
= &e2
->ref
; *r
; r
= &(*r
)->next
)
7480 if ((*r
)->type
== REF_ARRAY
&& !(*r
)->next
)
7482 gfc_free_ref_list (*r
);
7491 /* Used in resolve_allocate_expr to check that a allocation-object and
7492 a source-expr are conformable. This does not catch all possible
7493 cases; in particular a runtime checking is needed. */
7496 conformable_arrays (gfc_expr
*e1
, gfc_expr
*e2
)
7499 for (tail
= e2
->ref
; tail
&& tail
->next
; tail
= tail
->next
);
7501 /* First compare rank. */
7502 if ((tail
&& (!tail
->u
.ar
.as
|| e1
->rank
!= tail
->u
.ar
.as
->rank
))
7503 || (!tail
&& e1
->rank
!= e2
->rank
))
7505 gfc_error ("Source-expr at %L must be scalar or have the "
7506 "same rank as the allocate-object at %L",
7507 &e1
->where
, &e2
->where
);
7518 for (i
= 0; i
< e1
->rank
; i
++)
7520 if (tail
->u
.ar
.start
[i
] == NULL
)
7523 if (tail
->u
.ar
.end
[i
])
7525 mpz_set (s
, tail
->u
.ar
.end
[i
]->value
.integer
);
7526 mpz_sub (s
, s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7527 mpz_add_ui (s
, s
, 1);
7531 mpz_set (s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7534 if (mpz_cmp (e1
->shape
[i
], s
) != 0)
7536 gfc_error ("Source-expr at %L and allocate-object at %L must "
7537 "have the same shape", &e1
->where
, &e2
->where
);
7550 /* Resolve the expression in an ALLOCATE statement, doing the additional
7551 checks to see whether the expression is OK or not. The expression must
7552 have a trailing array reference that gives the size of the array. */
7555 resolve_allocate_expr (gfc_expr
*e
, gfc_code
*code
, bool *array_alloc_wo_spec
)
7557 int i
, pointer
, allocatable
, dimension
, is_abstract
;
7561 symbol_attribute attr
;
7562 gfc_ref
*ref
, *ref2
;
7565 gfc_symbol
*sym
= NULL
;
7570 /* Mark the utmost array component as being in allocate to allow DIMEN_STAR
7571 checking of coarrays. */
7572 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7573 if (ref
->next
== NULL
)
7576 if (ref
&& ref
->type
== REF_ARRAY
)
7577 ref
->u
.ar
.in_allocate
= true;
7579 if (!gfc_resolve_expr (e
))
7582 /* Make sure the expression is allocatable or a pointer. If it is
7583 pointer, the next-to-last reference must be a pointer. */
7587 sym
= e
->symtree
->n
.sym
;
7589 /* Check whether ultimate component is abstract and CLASS. */
7592 /* Is the allocate-object unlimited polymorphic? */
7593 unlimited
= UNLIMITED_POLY(e
);
7595 if (e
->expr_type
!= EXPR_VARIABLE
)
7598 attr
= gfc_expr_attr (e
);
7599 pointer
= attr
.pointer
;
7600 dimension
= attr
.dimension
;
7601 codimension
= attr
.codimension
;
7605 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
))
7607 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7608 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7609 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
7610 codimension
= CLASS_DATA (sym
)->attr
.codimension
;
7611 is_abstract
= CLASS_DATA (sym
)->attr
.abstract
;
7615 allocatable
= sym
->attr
.allocatable
;
7616 pointer
= sym
->attr
.pointer
;
7617 dimension
= sym
->attr
.dimension
;
7618 codimension
= sym
->attr
.codimension
;
7623 for (ref
= e
->ref
; ref
; ref2
= ref
, ref
= ref
->next
)
7628 if (ref
->u
.ar
.codimen
> 0)
7631 for (n
= ref
->u
.ar
.dimen
;
7632 n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
7633 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_THIS_IMAGE
)
7640 if (ref
->next
!= NULL
)
7648 gfc_error ("Coindexed allocatable object at %L",
7653 c
= ref
->u
.c
.component
;
7654 if (c
->ts
.type
== BT_CLASS
)
7656 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7657 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7658 dimension
= CLASS_DATA (c
)->attr
.dimension
;
7659 codimension
= CLASS_DATA (c
)->attr
.codimension
;
7660 is_abstract
= CLASS_DATA (c
)->attr
.abstract
;
7664 allocatable
= c
->attr
.allocatable
;
7665 pointer
= c
->attr
.pointer
;
7666 dimension
= c
->attr
.dimension
;
7667 codimension
= c
->attr
.codimension
;
7668 is_abstract
= c
->attr
.abstract
;
7681 /* Check for F08:C628. */
7682 if (allocatable
== 0 && pointer
== 0 && !unlimited
)
7684 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7689 /* Some checks for the SOURCE tag. */
7692 /* Check F03:C631. */
7693 if (!gfc_type_compatible (&e
->ts
, &code
->expr3
->ts
))
7695 gfc_error ("Type of entity at %L is type incompatible with "
7696 "source-expr at %L", &e
->where
, &code
->expr3
->where
);
7700 /* Check F03:C632 and restriction following Note 6.18. */
7701 if (code
->expr3
->rank
> 0 && !conformable_arrays (code
->expr3
, e
))
7704 /* Check F03:C633. */
7705 if (code
->expr3
->ts
.kind
!= e
->ts
.kind
&& !unlimited
)
7707 gfc_error ("The allocate-object at %L and the source-expr at %L "
7708 "shall have the same kind type parameter",
7709 &e
->where
, &code
->expr3
->where
);
7713 /* Check F2008, C642. */
7714 if (code
->expr3
->ts
.type
== BT_DERIVED
7715 && ((codimension
&& gfc_expr_attr (code
->expr3
).lock_comp
)
7716 || (code
->expr3
->ts
.u
.derived
->from_intmod
7717 == INTMOD_ISO_FORTRAN_ENV
7718 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7719 == ISOFORTRAN_LOCK_TYPE
)))
7721 gfc_error ("The source-expr at %L shall neither be of type "
7722 "LOCK_TYPE nor have a LOCK_TYPE component if "
7723 "allocate-object at %L is a coarray",
7724 &code
->expr3
->where
, &e
->where
);
7728 /* Check TS18508, C702/C703. */
7729 if (code
->expr3
->ts
.type
== BT_DERIVED
7730 && ((codimension
&& gfc_expr_attr (code
->expr3
).event_comp
)
7731 || (code
->expr3
->ts
.u
.derived
->from_intmod
7732 == INTMOD_ISO_FORTRAN_ENV
7733 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7734 == ISOFORTRAN_EVENT_TYPE
)))
7736 gfc_error ("The source-expr at %L shall neither be of type "
7737 "EVENT_TYPE nor have a EVENT_TYPE component if "
7738 "allocate-object at %L is a coarray",
7739 &code
->expr3
->where
, &e
->where
);
7744 /* Check F08:C629. */
7745 if (is_abstract
&& code
->ext
.alloc
.ts
.type
== BT_UNKNOWN
7748 gcc_assert (e
->ts
.type
== BT_CLASS
);
7749 gfc_error ("Allocating %s of ABSTRACT base type at %L requires a "
7750 "type-spec or source-expr", sym
->name
, &e
->where
);
7754 /* Check F08:C632. */
7755 if (code
->ext
.alloc
.ts
.type
== BT_CHARACTER
&& !e
->ts
.deferred
7756 && !UNLIMITED_POLY (e
))
7760 if (!e
->ts
.u
.cl
->length
)
7763 cmp
= gfc_dep_compare_expr (e
->ts
.u
.cl
->length
,
7764 code
->ext
.alloc
.ts
.u
.cl
->length
);
7765 if (cmp
== 1 || cmp
== -1 || cmp
== -3)
7767 gfc_error ("Allocating %s at %L with type-spec requires the same "
7768 "character-length parameter as in the declaration",
7769 sym
->name
, &e
->where
);
7774 /* In the variable definition context checks, gfc_expr_attr is used
7775 on the expression. This is fooled by the array specification
7776 present in e, thus we have to eliminate that one temporarily. */
7777 e2
= remove_last_array_ref (e
);
7780 t
= gfc_check_vardef_context (e2
, true, true, false,
7781 _("ALLOCATE object"));
7783 t
= gfc_check_vardef_context (e2
, false, true, false,
7784 _("ALLOCATE object"));
7789 if (e
->ts
.type
== BT_CLASS
&& CLASS_DATA (e
)->attr
.dimension
7790 && !code
->expr3
&& code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7792 /* For class arrays, the initialization with SOURCE is done
7793 using _copy and trans_call. It is convenient to exploit that
7794 when the allocated type is different from the declared type but
7795 no SOURCE exists by setting expr3. */
7796 code
->expr3
= gfc_default_initializer (&code
->ext
.alloc
.ts
);
7798 else if (flag_coarray
!= GFC_FCOARRAY_LIB
&& e
->ts
.type
== BT_DERIVED
7799 && e
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
7800 && e
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
7802 /* We have to zero initialize the integer variable. */
7803 code
->expr3
= gfc_get_int_expr (gfc_default_integer_kind
, &e
->where
, 0);
7806 if (e
->ts
.type
== BT_CLASS
&& !unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7808 /* Make sure the vtab symbol is present when
7809 the module variables are generated. */
7810 gfc_typespec ts
= e
->ts
;
7812 ts
= code
->expr3
->ts
;
7813 else if (code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7814 ts
= code
->ext
.alloc
.ts
;
7816 /* Finding the vtab also publishes the type's symbol. Therefore this
7817 statement is necessary. */
7818 gfc_find_derived_vtab (ts
.u
.derived
);
7820 else if (unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7822 /* Again, make sure the vtab symbol is present when
7823 the module variables are generated. */
7824 gfc_typespec
*ts
= NULL
;
7826 ts
= &code
->expr3
->ts
;
7828 ts
= &code
->ext
.alloc
.ts
;
7832 /* Finding the vtab also publishes the type's symbol. Therefore this
7833 statement is necessary. */
7837 if (dimension
== 0 && codimension
== 0)
7840 /* Make sure the last reference node is an array specification. */
7842 if (!ref2
|| ref2
->type
!= REF_ARRAY
|| ref2
->u
.ar
.type
== AR_FULL
7843 || (dimension
&& ref2
->u
.ar
.dimen
== 0))
7848 if (!gfc_notify_std (GFC_STD_F2008
, "Array specification required "
7849 "in ALLOCATE statement at %L", &e
->where
))
7851 if (code
->expr3
->rank
!= 0)
7852 *array_alloc_wo_spec
= true;
7855 gfc_error ("Array specification or array-valued SOURCE= "
7856 "expression required in ALLOCATE statement at %L",
7863 gfc_error ("Array specification required in ALLOCATE statement "
7864 "at %L", &e
->where
);
7869 /* Make sure that the array section reference makes sense in the
7870 context of an ALLOCATE specification. */
7875 for (i
= ar
->dimen
; i
< ar
->dimen
+ ar
->codimen
; i
++)
7877 switch (ar
->dimen_type
[i
])
7879 case DIMEN_THIS_IMAGE
:
7880 gfc_error ("Coarray specification required in ALLOCATE statement "
7881 "at %L", &e
->where
);
7885 if (ar
->start
[i
] == 0 || ar
->end
[i
] == 0)
7887 /* If ar->stride[i] is NULL, we issued a previous error. */
7888 if (ar
->stride
[i
] == NULL
)
7889 gfc_error ("Bad array specification in ALLOCATE statement "
7890 "at %L", &e
->where
);
7893 else if (gfc_dep_compare_expr (ar
->start
[i
], ar
->end
[i
]) == 1)
7895 gfc_error ("Upper cobound is less than lower cobound at %L",
7896 &ar
->start
[i
]->where
);
7902 if (ar
->start
[i
]->expr_type
== EXPR_CONSTANT
)
7904 gcc_assert (ar
->start
[i
]->ts
.type
== BT_INTEGER
);
7905 if (mpz_cmp_si (ar
->start
[i
]->value
.integer
, 1) < 0)
7907 gfc_error ("Upper cobound is less than lower cobound "
7908 "of 1 at %L", &ar
->start
[i
]->where
);
7918 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7924 for (i
= 0; i
< ar
->dimen
; i
++)
7926 if (ar
->type
== AR_ELEMENT
|| ar
->type
== AR_FULL
)
7929 switch (ar
->dimen_type
[i
])
7935 if (ar
->start
[i
] != NULL
7936 && ar
->end
[i
] != NULL
7937 && ar
->stride
[i
] == NULL
)
7945 case DIMEN_THIS_IMAGE
:
7946 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7952 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7954 sym
= a
->expr
->symtree
->n
.sym
;
7956 /* TODO - check derived type components. */
7957 if (gfc_bt_struct (sym
->ts
.type
) || sym
->ts
.type
== BT_CLASS
)
7960 if ((ar
->start
[i
] != NULL
7961 && gfc_find_sym_in_expr (sym
, ar
->start
[i
]))
7962 || (ar
->end
[i
] != NULL
7963 && gfc_find_sym_in_expr (sym
, ar
->end
[i
])))
7965 gfc_error ("%qs must not appear in the array specification at "
7966 "%L in the same ALLOCATE statement where it is "
7967 "itself allocated", sym
->name
, &ar
->where
);
7973 for (i
= ar
->dimen
; i
< ar
->codimen
+ ar
->dimen
; i
++)
7975 if (ar
->dimen_type
[i
] == DIMEN_ELEMENT
7976 || ar
->dimen_type
[i
] == DIMEN_RANGE
)
7978 if (i
== (ar
->dimen
+ ar
->codimen
- 1))
7980 gfc_error ("Expected '*' in coindex specification in ALLOCATE "
7981 "statement at %L", &e
->where
);
7987 if (ar
->dimen_type
[i
] == DIMEN_STAR
&& i
== (ar
->dimen
+ ar
->codimen
- 1)
7988 && ar
->stride
[i
] == NULL
)
7991 gfc_error ("Bad coarray specification in ALLOCATE statement at %L",
8005 resolve_allocate_deallocate (gfc_code
*code
, const char *fcn
)
8007 gfc_expr
*stat
, *errmsg
, *pe
, *qe
;
8008 gfc_alloc
*a
, *p
, *q
;
8011 errmsg
= code
->expr2
;
8013 /* Check the stat variable. */
8016 gfc_check_vardef_context (stat
, false, false, false,
8017 _("STAT variable"));
8019 if ((stat
->ts
.type
!= BT_INTEGER
8020 && !(stat
->ref
&& (stat
->ref
->type
== REF_ARRAY
8021 || stat
->ref
->type
== REF_COMPONENT
)))
8023 gfc_error ("Stat-variable at %L must be a scalar INTEGER "
8024 "variable", &stat
->where
);
8026 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
8027 if (p
->expr
->symtree
->n
.sym
->name
== stat
->symtree
->n
.sym
->name
)
8029 gfc_ref
*ref1
, *ref2
;
8032 for (ref1
= p
->expr
->ref
, ref2
= stat
->ref
; ref1
&& ref2
;
8033 ref1
= ref1
->next
, ref2
= ref2
->next
)
8035 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
8037 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
8046 gfc_error ("Stat-variable at %L shall not be %sd within "
8047 "the same %s statement", &stat
->where
, fcn
, fcn
);
8053 /* Check the errmsg variable. */
8057 gfc_warning (0, "ERRMSG at %L is useless without a STAT tag",
8060 gfc_check_vardef_context (errmsg
, false, false, false,
8061 _("ERRMSG variable"));
8063 /* F18:R928 alloc-opt is ERRMSG = errmsg-variable
8064 F18:R930 errmsg-variable is scalar-default-char-variable
8065 F18:R906 default-char-variable is variable
8066 F18:C906 default-char-variable shall be default character. */
8067 if ((errmsg
->ts
.type
!= BT_CHARACTER
8069 && (errmsg
->ref
->type
== REF_ARRAY
8070 || errmsg
->ref
->type
== REF_COMPONENT
)))
8072 || errmsg
->ts
.kind
!= gfc_default_character_kind
)
8073 gfc_error ("ERRMSG variable at %L shall be a scalar default CHARACTER "
8074 "variable", &errmsg
->where
);
8076 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
8077 if (p
->expr
->symtree
->n
.sym
->name
== errmsg
->symtree
->n
.sym
->name
)
8079 gfc_ref
*ref1
, *ref2
;
8082 for (ref1
= p
->expr
->ref
, ref2
= errmsg
->ref
; ref1
&& ref2
;
8083 ref1
= ref1
->next
, ref2
= ref2
->next
)
8085 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
8087 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
8096 gfc_error ("Errmsg-variable at %L shall not be %sd within "
8097 "the same %s statement", &errmsg
->where
, fcn
, fcn
);
8103 /* Check that an allocate-object appears only once in the statement. */
8105 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
8108 for (q
= p
->next
; q
; q
= q
->next
)
8111 if (pe
->symtree
->n
.sym
->name
== qe
->symtree
->n
.sym
->name
)
8113 /* This is a potential collision. */
8114 gfc_ref
*pr
= pe
->ref
;
8115 gfc_ref
*qr
= qe
->ref
;
8117 /* Follow the references until
8118 a) They start to differ, in which case there is no error;
8119 you can deallocate a%b and a%c in a single statement
8120 b) Both of them stop, which is an error
8121 c) One of them stops, which is also an error. */
8124 if (pr
== NULL
&& qr
== NULL
)
8126 gfc_error ("Allocate-object at %L also appears at %L",
8127 &pe
->where
, &qe
->where
);
8130 else if (pr
!= NULL
&& qr
== NULL
)
8132 gfc_error ("Allocate-object at %L is subobject of"
8133 " object at %L", &pe
->where
, &qe
->where
);
8136 else if (pr
== NULL
&& qr
!= NULL
)
8138 gfc_error ("Allocate-object at %L is subobject of"
8139 " object at %L", &qe
->where
, &pe
->where
);
8142 /* Here, pr != NULL && qr != NULL */
8143 gcc_assert(pr
->type
== qr
->type
);
8144 if (pr
->type
== REF_ARRAY
)
8146 /* Handle cases like allocate(v(3)%x(3), v(2)%x(3)),
8148 gcc_assert (qr
->type
== REF_ARRAY
);
8150 if (pr
->next
&& qr
->next
)
8153 gfc_array_ref
*par
= &(pr
->u
.ar
);
8154 gfc_array_ref
*qar
= &(qr
->u
.ar
);
8156 for (i
=0; i
<par
->dimen
; i
++)
8158 if ((par
->start
[i
] != NULL
8159 || qar
->start
[i
] != NULL
)
8160 && gfc_dep_compare_expr (par
->start
[i
],
8161 qar
->start
[i
]) != 0)
8168 if (pr
->u
.c
.component
->name
!= qr
->u
.c
.component
->name
)
8181 if (strcmp (fcn
, "ALLOCATE") == 0)
8183 bool arr_alloc_wo_spec
= false;
8185 /* Resolving the expr3 in the loop over all objects to allocate would
8186 execute loop invariant code for each loop item. Therefore do it just
8188 if (code
->expr3
&& code
->expr3
->mold
8189 && code
->expr3
->ts
.type
== BT_DERIVED
)
8191 /* Default initialization via MOLD (non-polymorphic). */
8192 gfc_expr
*rhs
= gfc_default_initializer (&code
->expr3
->ts
);
8195 gfc_resolve_expr (rhs
);
8196 gfc_free_expr (code
->expr3
);
8200 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8201 resolve_allocate_expr (a
->expr
, code
, &arr_alloc_wo_spec
);
8203 if (arr_alloc_wo_spec
&& code
->expr3
)
8205 /* Mark the allocate to have to take the array specification
8207 code
->ext
.alloc
.arr_spec_from_expr3
= 1;
8212 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8213 resolve_deallocate_expr (a
->expr
);
8218 /************ SELECT CASE resolution subroutines ************/
8220 /* Callback function for our mergesort variant. Determines interval
8221 overlaps for CASEs. Return <0 if op1 < op2, 0 for overlap, >0 for
8222 op1 > op2. Assumes we're not dealing with the default case.
8223 We have op1 = (:L), (K:L) or (K:) and op2 = (:N), (M:N) or (M:).
8224 There are nine situations to check. */
8227 compare_cases (const gfc_case
*op1
, const gfc_case
*op2
)
8231 if (op1
->low
== NULL
) /* op1 = (:L) */
8233 /* op2 = (:N), so overlap. */
8235 /* op2 = (M:) or (M:N), L < M */
8236 if (op2
->low
!= NULL
8237 && gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8240 else if (op1
->high
== NULL
) /* op1 = (K:) */
8242 /* op2 = (M:), so overlap. */
8244 /* op2 = (:N) or (M:N), K > N */
8245 if (op2
->high
!= NULL
8246 && gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8249 else /* op1 = (K:L) */
8251 if (op2
->low
== NULL
) /* op2 = (:N), K > N */
8252 retval
= (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8254 else if (op2
->high
== NULL
) /* op2 = (M:), L < M */
8255 retval
= (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8257 else /* op2 = (M:N) */
8261 if (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8264 else if (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8273 /* Merge-sort a double linked case list, detecting overlap in the
8274 process. LIST is the head of the double linked case list before it
8275 is sorted. Returns the head of the sorted list if we don't see any
8276 overlap, or NULL otherwise. */
8279 check_case_overlap (gfc_case
*list
)
8281 gfc_case
*p
, *q
, *e
, *tail
;
8282 int insize
, nmerges
, psize
, qsize
, cmp
, overlap_seen
;
8284 /* If the passed list was empty, return immediately. */
8291 /* Loop unconditionally. The only exit from this loop is a return
8292 statement, when we've finished sorting the case list. */
8299 /* Count the number of merges we do in this pass. */
8302 /* Loop while there exists a merge to be done. */
8307 /* Count this merge. */
8310 /* Cut the list in two pieces by stepping INSIZE places
8311 forward in the list, starting from P. */
8314 for (i
= 0; i
< insize
; i
++)
8323 /* Now we have two lists. Merge them! */
8324 while (psize
> 0 || (qsize
> 0 && q
!= NULL
))
8326 /* See from which the next case to merge comes from. */
8329 /* P is empty so the next case must come from Q. */
8334 else if (qsize
== 0 || q
== NULL
)
8343 cmp
= compare_cases (p
, q
);
8346 /* The whole case range for P is less than the
8354 /* The whole case range for Q is greater than
8355 the case range for P. */
8362 /* The cases overlap, or they are the same
8363 element in the list. Either way, we must
8364 issue an error and get the next case from P. */
8365 /* FIXME: Sort P and Q by line number. */
8366 gfc_error ("CASE label at %L overlaps with CASE "
8367 "label at %L", &p
->where
, &q
->where
);
8375 /* Add the next element to the merged list. */
8384 /* P has now stepped INSIZE places along, and so has Q. So
8385 they're the same. */
8390 /* If we have done only one merge or none at all, we've
8391 finished sorting the cases. */
8400 /* Otherwise repeat, merging lists twice the size. */
8406 /* Check to see if an expression is suitable for use in a CASE statement.
8407 Makes sure that all case expressions are scalar constants of the same
8408 type. Return false if anything is wrong. */
8411 validate_case_label_expr (gfc_expr
*e
, gfc_expr
*case_expr
)
8413 if (e
== NULL
) return true;
8415 if (e
->ts
.type
!= case_expr
->ts
.type
)
8417 gfc_error ("Expression in CASE statement at %L must be of type %s",
8418 &e
->where
, gfc_basic_typename (case_expr
->ts
.type
));
8422 /* C805 (R808) For a given case-construct, each case-value shall be of
8423 the same type as case-expr. For character type, length differences
8424 are allowed, but the kind type parameters shall be the same. */
8426 if (case_expr
->ts
.type
== BT_CHARACTER
&& e
->ts
.kind
!= case_expr
->ts
.kind
)
8428 gfc_error ("Expression in CASE statement at %L must be of kind %d",
8429 &e
->where
, case_expr
->ts
.kind
);
8433 /* Convert the case value kind to that of case expression kind,
8436 if (e
->ts
.kind
!= case_expr
->ts
.kind
)
8437 gfc_convert_type_warn (e
, &case_expr
->ts
, 2, 0);
8441 gfc_error ("Expression in CASE statement at %L must be scalar",
8450 /* Given a completely parsed select statement, we:
8452 - Validate all expressions and code within the SELECT.
8453 - Make sure that the selection expression is not of the wrong type.
8454 - Make sure that no case ranges overlap.
8455 - Eliminate unreachable cases and unreachable code resulting from
8456 removing case labels.
8458 The standard does allow unreachable cases, e.g. CASE (5:3). But
8459 they are a hassle for code generation, and to prevent that, we just
8460 cut them out here. This is not necessary for overlapping cases
8461 because they are illegal and we never even try to generate code.
8463 We have the additional caveat that a SELECT construct could have
8464 been a computed GOTO in the source code. Fortunately we can fairly
8465 easily work around that here: The case_expr for a "real" SELECT CASE
8466 is in code->expr1, but for a computed GOTO it is in code->expr2. All
8467 we have to do is make sure that the case_expr is a scalar integer
8471 resolve_select (gfc_code
*code
, bool select_type
)
8474 gfc_expr
*case_expr
;
8475 gfc_case
*cp
, *default_case
, *tail
, *head
;
8476 int seen_unreachable
;
8482 if (code
->expr1
== NULL
)
8484 /* This was actually a computed GOTO statement. */
8485 case_expr
= code
->expr2
;
8486 if (case_expr
->ts
.type
!= BT_INTEGER
|| case_expr
->rank
!= 0)
8487 gfc_error ("Selection expression in computed GOTO statement "
8488 "at %L must be a scalar integer expression",
8491 /* Further checking is not necessary because this SELECT was built
8492 by the compiler, so it should always be OK. Just move the
8493 case_expr from expr2 to expr so that we can handle computed
8494 GOTOs as normal SELECTs from here on. */
8495 code
->expr1
= code
->expr2
;
8500 case_expr
= code
->expr1
;
8501 type
= case_expr
->ts
.type
;
8504 if (type
!= BT_LOGICAL
&& type
!= BT_INTEGER
&& type
!= BT_CHARACTER
)
8506 gfc_error ("Argument of SELECT statement at %L cannot be %s",
8507 &case_expr
->where
, gfc_typename (case_expr
));
8509 /* Punt. Going on here just produce more garbage error messages. */
8514 if (!select_type
&& case_expr
->rank
!= 0)
8516 gfc_error ("Argument of SELECT statement at %L must be a scalar "
8517 "expression", &case_expr
->where
);
8523 /* Raise a warning if an INTEGER case value exceeds the range of
8524 the case-expr. Later, all expressions will be promoted to the
8525 largest kind of all case-labels. */
8527 if (type
== BT_INTEGER
)
8528 for (body
= code
->block
; body
; body
= body
->block
)
8529 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8532 && gfc_check_integer_range (cp
->low
->value
.integer
,
8533 case_expr
->ts
.kind
) != ARITH_OK
)
8534 gfc_warning (0, "Expression in CASE statement at %L is "
8535 "not in the range of %s", &cp
->low
->where
,
8536 gfc_typename (case_expr
));
8539 && cp
->low
!= cp
->high
8540 && gfc_check_integer_range (cp
->high
->value
.integer
,
8541 case_expr
->ts
.kind
) != ARITH_OK
)
8542 gfc_warning (0, "Expression in CASE statement at %L is "
8543 "not in the range of %s", &cp
->high
->where
,
8544 gfc_typename (case_expr
));
8547 /* PR 19168 has a long discussion concerning a mismatch of the kinds
8548 of the SELECT CASE expression and its CASE values. Walk the lists
8549 of case values, and if we find a mismatch, promote case_expr to
8550 the appropriate kind. */
8552 if (type
== BT_LOGICAL
|| type
== BT_INTEGER
)
8554 for (body
= code
->block
; body
; body
= body
->block
)
8556 /* Walk the case label list. */
8557 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8559 /* Intercept the DEFAULT case. It does not have a kind. */
8560 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8563 /* Unreachable case ranges are discarded, so ignore. */
8564 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8565 && cp
->low
!= cp
->high
8566 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8570 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->low
))
8571 gfc_convert_type_warn (case_expr
, &cp
->low
->ts
, 2, 0);
8573 if (cp
->high
!= NULL
8574 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->high
))
8575 gfc_convert_type_warn (case_expr
, &cp
->high
->ts
, 2, 0);
8580 /* Assume there is no DEFAULT case. */
8581 default_case
= NULL
;
8586 for (body
= code
->block
; body
; body
= body
->block
)
8588 /* Assume the CASE list is OK, and all CASE labels can be matched. */
8590 seen_unreachable
= 0;
8592 /* Walk the case label list, making sure that all case labels
8594 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8596 /* Count the number of cases in the whole construct. */
8599 /* Intercept the DEFAULT case. */
8600 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8602 if (default_case
!= NULL
)
8604 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8605 "by a second DEFAULT CASE at %L",
8606 &default_case
->where
, &cp
->where
);
8617 /* Deal with single value cases and case ranges. Errors are
8618 issued from the validation function. */
8619 if (!validate_case_label_expr (cp
->low
, case_expr
)
8620 || !validate_case_label_expr (cp
->high
, case_expr
))
8626 if (type
== BT_LOGICAL
8627 && ((cp
->low
== NULL
|| cp
->high
== NULL
)
8628 || cp
->low
!= cp
->high
))
8630 gfc_error ("Logical range in CASE statement at %L is not "
8631 "allowed", &cp
->low
->where
);
8636 if (type
== BT_LOGICAL
&& cp
->low
->expr_type
== EXPR_CONSTANT
)
8639 value
= cp
->low
->value
.logical
== 0 ? 2 : 1;
8640 if (value
& seen_logical
)
8642 gfc_error ("Constant logical value in CASE statement "
8643 "is repeated at %L",
8648 seen_logical
|= value
;
8651 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8652 && cp
->low
!= cp
->high
8653 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8655 if (warn_surprising
)
8656 gfc_warning (OPT_Wsurprising
,
8657 "Range specification at %L can never be matched",
8660 cp
->unreachable
= 1;
8661 seen_unreachable
= 1;
8665 /* If the case range can be matched, it can also overlap with
8666 other cases. To make sure it does not, we put it in a
8667 double linked list here. We sort that with a merge sort
8668 later on to detect any overlapping cases. */
8672 head
->right
= head
->left
= NULL
;
8677 tail
->right
->left
= tail
;
8684 /* It there was a failure in the previous case label, give up
8685 for this case label list. Continue with the next block. */
8689 /* See if any case labels that are unreachable have been seen.
8690 If so, we eliminate them. This is a bit of a kludge because
8691 the case lists for a single case statement (label) is a
8692 single forward linked lists. */
8693 if (seen_unreachable
)
8695 /* Advance until the first case in the list is reachable. */
8696 while (body
->ext
.block
.case_list
!= NULL
8697 && body
->ext
.block
.case_list
->unreachable
)
8699 gfc_case
*n
= body
->ext
.block
.case_list
;
8700 body
->ext
.block
.case_list
= body
->ext
.block
.case_list
->next
;
8702 gfc_free_case_list (n
);
8705 /* Strip all other unreachable cases. */
8706 if (body
->ext
.block
.case_list
)
8708 for (cp
= body
->ext
.block
.case_list
; cp
&& cp
->next
; cp
= cp
->next
)
8710 if (cp
->next
->unreachable
)
8712 gfc_case
*n
= cp
->next
;
8713 cp
->next
= cp
->next
->next
;
8715 gfc_free_case_list (n
);
8722 /* See if there were overlapping cases. If the check returns NULL,
8723 there was overlap. In that case we don't do anything. If head
8724 is non-NULL, we prepend the DEFAULT case. The sorted list can
8725 then used during code generation for SELECT CASE constructs with
8726 a case expression of a CHARACTER type. */
8729 head
= check_case_overlap (head
);
8731 /* Prepend the default_case if it is there. */
8732 if (head
!= NULL
&& default_case
)
8734 default_case
->left
= NULL
;
8735 default_case
->right
= head
;
8736 head
->left
= default_case
;
8740 /* Eliminate dead blocks that may be the result if we've seen
8741 unreachable case labels for a block. */
8742 for (body
= code
; body
&& body
->block
; body
= body
->block
)
8744 if (body
->block
->ext
.block
.case_list
== NULL
)
8746 /* Cut the unreachable block from the code chain. */
8747 gfc_code
*c
= body
->block
;
8748 body
->block
= c
->block
;
8750 /* Kill the dead block, but not the blocks below it. */
8752 gfc_free_statements (c
);
8756 /* More than two cases is legal but insane for logical selects.
8757 Issue a warning for it. */
8758 if (warn_surprising
&& type
== BT_LOGICAL
&& ncases
> 2)
8759 gfc_warning (OPT_Wsurprising
,
8760 "Logical SELECT CASE block at %L has more that two cases",
8765 /* Check if a derived type is extensible. */
8768 gfc_type_is_extensible (gfc_symbol
*sym
)
8770 return !(sym
->attr
.is_bind_c
|| sym
->attr
.sequence
8771 || (sym
->attr
.is_class
8772 && sym
->components
->ts
.u
.derived
->attr
.unlimited_polymorphic
));
8777 resolve_types (gfc_namespace
*ns
);
8779 /* Resolve an associate-name: Resolve target and ensure the type-spec is
8780 correct as well as possibly the array-spec. */
8783 resolve_assoc_var (gfc_symbol
* sym
, bool resolve_target
)
8787 gcc_assert (sym
->assoc
);
8788 gcc_assert (sym
->attr
.flavor
== FL_VARIABLE
);
8790 /* If this is for SELECT TYPE, the target may not yet be set. In that
8791 case, return. Resolution will be called later manually again when
8793 target
= sym
->assoc
->target
;
8796 gcc_assert (!sym
->assoc
->dangling
);
8798 if (resolve_target
&& !gfc_resolve_expr (target
))
8801 /* For variable targets, we get some attributes from the target. */
8802 if (target
->expr_type
== EXPR_VARIABLE
)
8806 gcc_assert (target
->symtree
);
8807 tsym
= target
->symtree
->n
.sym
;
8809 sym
->attr
.asynchronous
= tsym
->attr
.asynchronous
;
8810 sym
->attr
.volatile_
= tsym
->attr
.volatile_
;
8812 sym
->attr
.target
= tsym
->attr
.target
8813 || gfc_expr_attr (target
).pointer
;
8814 if (is_subref_array (target
))
8815 sym
->attr
.subref_array_pointer
= 1;
8818 if (target
->expr_type
== EXPR_NULL
)
8820 gfc_error ("Selector at %L cannot be NULL()", &target
->where
);
8823 else if (target
->ts
.type
== BT_UNKNOWN
)
8825 gfc_error ("Selector at %L has no type", &target
->where
);
8829 /* Get type if this was not already set. Note that it can be
8830 some other type than the target in case this is a SELECT TYPE
8831 selector! So we must not update when the type is already there. */
8832 if (sym
->ts
.type
== BT_UNKNOWN
)
8833 sym
->ts
= target
->ts
;
8835 gcc_assert (sym
->ts
.type
!= BT_UNKNOWN
);
8837 /* See if this is a valid association-to-variable. */
8838 sym
->assoc
->variable
= (target
->expr_type
== EXPR_VARIABLE
8839 && !gfc_has_vector_subscript (target
));
8841 /* Finally resolve if this is an array or not. */
8842 if (sym
->attr
.dimension
&& target
->rank
== 0)
8844 /* primary.c makes the assumption that a reference to an associate
8845 name followed by a left parenthesis is an array reference. */
8846 if (sym
->ts
.type
!= BT_CHARACTER
)
8847 gfc_error ("Associate-name %qs at %L is used as array",
8848 sym
->name
, &sym
->declared_at
);
8849 sym
->attr
.dimension
= 0;
8854 /* We cannot deal with class selectors that need temporaries. */
8855 if (target
->ts
.type
== BT_CLASS
8856 && gfc_ref_needs_temporary_p (target
->ref
))
8858 gfc_error ("CLASS selector at %L needs a temporary which is not "
8859 "yet implemented", &target
->where
);
8863 if (target
->ts
.type
== BT_CLASS
)
8864 gfc_fix_class_refs (target
);
8866 if (target
->rank
!= 0 && !sym
->attr
.select_rank_temporary
)
8869 /* The rank may be incorrectly guessed at parsing, therefore make sure
8870 it is corrected now. */
8871 if (sym
->ts
.type
!= BT_CLASS
&& (!sym
->as
|| sym
->assoc
->rankguessed
))
8874 sym
->as
= gfc_get_array_spec ();
8876 as
->rank
= target
->rank
;
8877 as
->type
= AS_DEFERRED
;
8878 as
->corank
= gfc_get_corank (target
);
8879 sym
->attr
.dimension
= 1;
8880 if (as
->corank
!= 0)
8881 sym
->attr
.codimension
= 1;
8883 else if (sym
->ts
.type
== BT_CLASS
&& (!CLASS_DATA (sym
)->as
|| sym
->assoc
->rankguessed
))
8885 if (!CLASS_DATA (sym
)->as
)
8886 CLASS_DATA (sym
)->as
= gfc_get_array_spec ();
8887 as
= CLASS_DATA (sym
)->as
;
8888 as
->rank
= target
->rank
;
8889 as
->type
= AS_DEFERRED
;
8890 as
->corank
= gfc_get_corank (target
);
8891 CLASS_DATA (sym
)->attr
.dimension
= 1;
8892 if (as
->corank
!= 0)
8893 CLASS_DATA (sym
)->attr
.codimension
= 1;
8896 else if (!sym
->attr
.select_rank_temporary
)
8898 /* target's rank is 0, but the type of the sym is still array valued,
8899 which has to be corrected. */
8900 if (sym
->ts
.type
== BT_CLASS
8901 && CLASS_DATA (sym
) && CLASS_DATA (sym
)->as
)
8904 symbol_attribute attr
;
8905 /* The associated variable's type is still the array type
8906 correct this now. */
8907 gfc_typespec
*ts
= &target
->ts
;
8910 for (ref
= target
->ref
; ref
!= NULL
; ref
= ref
->next
)
8915 ts
= &ref
->u
.c
.component
->ts
;
8918 if (ts
->type
== BT_CLASS
)
8919 ts
= &ts
->u
.derived
->components
->ts
;
8925 /* Create a scalar instance of the current class type. Because the
8926 rank of a class array goes into its name, the type has to be
8927 rebuild. The alternative of (re-)setting just the attributes
8928 and as in the current type, destroys the type also in other
8932 sym
->ts
.type
= BT_CLASS
;
8933 attr
= CLASS_DATA (sym
)->attr
;
8935 attr
.associate_var
= 1;
8936 attr
.dimension
= attr
.codimension
= 0;
8937 attr
.class_pointer
= 1;
8938 if (!gfc_build_class_symbol (&sym
->ts
, &attr
, &as
))
8940 /* Make sure the _vptr is set. */
8941 c
= gfc_find_component (sym
->ts
.u
.derived
, "_vptr", true, true, NULL
);
8942 if (c
->ts
.u
.derived
== NULL
)
8943 c
->ts
.u
.derived
= gfc_find_derived_vtab (sym
->ts
.u
.derived
);
8944 CLASS_DATA (sym
)->attr
.pointer
= 1;
8945 CLASS_DATA (sym
)->attr
.class_pointer
= 1;
8946 gfc_set_sym_referenced (sym
->ts
.u
.derived
);
8947 gfc_commit_symbol (sym
->ts
.u
.derived
);
8948 /* _vptr now has the _vtab in it, change it to the _vtype. */
8949 if (c
->ts
.u
.derived
->attr
.vtab
)
8950 c
->ts
.u
.derived
= c
->ts
.u
.derived
->ts
.u
.derived
;
8951 c
->ts
.u
.derived
->ns
->types_resolved
= 0;
8952 resolve_types (c
->ts
.u
.derived
->ns
);
8956 /* Mark this as an associate variable. */
8957 sym
->attr
.associate_var
= 1;
8959 /* Fix up the type-spec for CHARACTER types. */
8960 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.select_type_temporary
)
8963 sym
->ts
.u
.cl
= target
->ts
.u
.cl
;
8965 if (sym
->ts
.deferred
&& target
->expr_type
== EXPR_VARIABLE
8966 && target
->symtree
->n
.sym
->attr
.dummy
8967 && sym
->ts
.u
.cl
== target
->ts
.u
.cl
)
8969 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
8970 sym
->ts
.deferred
= 1;
8973 if (!sym
->ts
.u
.cl
->length
8974 && !sym
->ts
.deferred
8975 && target
->expr_type
== EXPR_CONSTANT
)
8977 sym
->ts
.u
.cl
->length
=
8978 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
8979 target
->value
.character
.length
);
8981 else if ((!sym
->ts
.u
.cl
->length
8982 || sym
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
)
8983 && target
->expr_type
!= EXPR_VARIABLE
)
8985 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
8986 sym
->ts
.deferred
= 1;
8988 /* This is reset in trans-stmt.c after the assignment
8989 of the target expression to the associate name. */
8990 sym
->attr
.allocatable
= 1;
8994 /* If the target is a good class object, so is the associate variable. */
8995 if (sym
->ts
.type
== BT_CLASS
&& gfc_expr_attr (target
).class_ok
)
8996 sym
->attr
.class_ok
= 1;
9000 /* Ensure that SELECT TYPE expressions have the correct rank and a full
9001 array reference, where necessary. The symbols are artificial and so
9002 the dimension attribute and arrayspec can also be set. In addition,
9003 sometimes the expr1 arrives as BT_DERIVED, when the symbol is BT_CLASS.
9004 This is corrected here as well.*/
9007 fixup_array_ref (gfc_expr
**expr1
, gfc_expr
*expr2
,
9008 int rank
, gfc_ref
*ref
)
9010 gfc_ref
*nref
= (*expr1
)->ref
;
9011 gfc_symbol
*sym1
= (*expr1
)->symtree
->n
.sym
;
9012 gfc_symbol
*sym2
= expr2
? expr2
->symtree
->n
.sym
: NULL
;
9013 (*expr1
)->rank
= rank
;
9014 if (sym1
->ts
.type
== BT_CLASS
)
9016 if ((*expr1
)->ts
.type
!= BT_CLASS
)
9017 (*expr1
)->ts
= sym1
->ts
;
9019 CLASS_DATA (sym1
)->attr
.dimension
= 1;
9020 if (CLASS_DATA (sym1
)->as
== NULL
&& sym2
)
9021 CLASS_DATA (sym1
)->as
9022 = gfc_copy_array_spec (CLASS_DATA (sym2
)->as
);
9026 sym1
->attr
.dimension
= 1;
9027 if (sym1
->as
== NULL
&& sym2
)
9028 sym1
->as
= gfc_copy_array_spec (sym2
->as
);
9031 for (; nref
; nref
= nref
->next
)
9032 if (nref
->next
== NULL
)
9035 if (ref
&& nref
&& nref
->type
!= REF_ARRAY
)
9036 nref
->next
= gfc_copy_ref (ref
);
9037 else if (ref
&& !nref
)
9038 (*expr1
)->ref
= gfc_copy_ref (ref
);
9043 build_loc_call (gfc_expr
*sym_expr
)
9046 loc_call
= gfc_get_expr ();
9047 loc_call
->expr_type
= EXPR_FUNCTION
;
9048 gfc_get_sym_tree ("_loc", gfc_current_ns
, &loc_call
->symtree
, false);
9049 loc_call
->symtree
->n
.sym
->attr
.flavor
= FL_PROCEDURE
;
9050 loc_call
->symtree
->n
.sym
->attr
.intrinsic
= 1;
9051 loc_call
->symtree
->n
.sym
->result
= loc_call
->symtree
->n
.sym
;
9052 gfc_commit_symbol (loc_call
->symtree
->n
.sym
);
9053 loc_call
->ts
.type
= BT_INTEGER
;
9054 loc_call
->ts
.kind
= gfc_index_integer_kind
;
9055 loc_call
->value
.function
.isym
= gfc_intrinsic_function_by_id (GFC_ISYM_LOC
);
9056 loc_call
->value
.function
.actual
= gfc_get_actual_arglist ();
9057 loc_call
->value
.function
.actual
->expr
= sym_expr
;
9058 loc_call
->where
= sym_expr
->where
;
9062 /* Resolve a SELECT TYPE statement. */
9065 resolve_select_type (gfc_code
*code
, gfc_namespace
*old_ns
)
9067 gfc_symbol
*selector_type
;
9068 gfc_code
*body
, *new_st
, *if_st
, *tail
;
9069 gfc_code
*class_is
= NULL
, *default_case
= NULL
;
9072 char name
[GFC_MAX_SYMBOL_LEN
];
9076 gfc_ref
* ref
= NULL
;
9077 gfc_expr
*selector_expr
= NULL
;
9079 ns
= code
->ext
.block
.ns
;
9082 /* Check for F03:C813. */
9083 if (code
->expr1
->ts
.type
!= BT_CLASS
9084 && !(code
->expr2
&& code
->expr2
->ts
.type
== BT_CLASS
))
9086 gfc_error ("Selector shall be polymorphic in SELECT TYPE statement "
9087 "at %L", &code
->loc
);
9091 if (!code
->expr1
->symtree
->n
.sym
->attr
.class_ok
)
9096 gfc_ref
*ref2
= NULL
;
9097 for (ref
= code
->expr2
->ref
; ref
!= NULL
; ref
= ref
->next
)
9098 if (ref
->type
== REF_COMPONENT
9099 && ref
->u
.c
.component
->ts
.type
== BT_CLASS
)
9104 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
9105 code
->expr1
->symtree
->n
.sym
->ts
= ref2
->u
.c
.component
->ts
;
9106 selector_type
= CLASS_DATA (ref2
->u
.c
.component
)->ts
.u
.derived
;
9110 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
9111 code
->expr1
->symtree
->n
.sym
->ts
= code
->expr2
->ts
;
9112 selector_type
= CLASS_DATA (code
->expr2
)->ts
.u
.derived
;
9115 if (code
->expr2
->rank
&& CLASS_DATA (code
->expr1
)->as
)
9116 CLASS_DATA (code
->expr1
)->as
->rank
= code
->expr2
->rank
;
9118 /* F2008: C803 The selector expression must not be coindexed. */
9119 if (gfc_is_coindexed (code
->expr2
))
9121 gfc_error ("Selector at %L must not be coindexed",
9122 &code
->expr2
->where
);
9129 selector_type
= CLASS_DATA (code
->expr1
)->ts
.u
.derived
;
9131 if (gfc_is_coindexed (code
->expr1
))
9133 gfc_error ("Selector at %L must not be coindexed",
9134 &code
->expr1
->where
);
9139 /* Loop over TYPE IS / CLASS IS cases. */
9140 for (body
= code
->block
; body
; body
= body
->block
)
9142 c
= body
->ext
.block
.case_list
;
9146 /* Check for repeated cases. */
9147 for (tail
= code
->block
; tail
; tail
= tail
->block
)
9149 gfc_case
*d
= tail
->ext
.block
.case_list
;
9153 if (c
->ts
.type
== d
->ts
.type
9154 && ((c
->ts
.type
== BT_DERIVED
9155 && c
->ts
.u
.derived
&& d
->ts
.u
.derived
9156 && !strcmp (c
->ts
.u
.derived
->name
,
9157 d
->ts
.u
.derived
->name
))
9158 || c
->ts
.type
== BT_UNKNOWN
9159 || (!(c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9160 && c
->ts
.kind
== d
->ts
.kind
)))
9162 gfc_error ("TYPE IS at %L overlaps with TYPE IS at %L",
9163 &c
->where
, &d
->where
);
9169 /* Check F03:C815. */
9170 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9171 && !selector_type
->attr
.unlimited_polymorphic
9172 && !gfc_type_is_extensible (c
->ts
.u
.derived
))
9174 gfc_error ("Derived type %qs at %L must be extensible",
9175 c
->ts
.u
.derived
->name
, &c
->where
);
9180 /* Check F03:C816. */
9181 if (c
->ts
.type
!= BT_UNKNOWN
&& !selector_type
->attr
.unlimited_polymorphic
9182 && ((c
->ts
.type
!= BT_DERIVED
&& c
->ts
.type
!= BT_CLASS
)
9183 || !gfc_type_is_extension_of (selector_type
, c
->ts
.u
.derived
)))
9185 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9186 gfc_error ("Derived type %qs at %L must be an extension of %qs",
9187 c
->ts
.u
.derived
->name
, &c
->where
, selector_type
->name
);
9189 gfc_error ("Unexpected intrinsic type %qs at %L",
9190 gfc_basic_typename (c
->ts
.type
), &c
->where
);
9195 /* Check F03:C814. */
9196 if (c
->ts
.type
== BT_CHARACTER
9197 && (c
->ts
.u
.cl
->length
!= NULL
|| c
->ts
.deferred
))
9199 gfc_error ("The type-spec at %L shall specify that each length "
9200 "type parameter is assumed", &c
->where
);
9205 /* Intercept the DEFAULT case. */
9206 if (c
->ts
.type
== BT_UNKNOWN
)
9208 /* Check F03:C818. */
9211 gfc_error ("The DEFAULT CASE at %L cannot be followed "
9212 "by a second DEFAULT CASE at %L",
9213 &default_case
->ext
.block
.case_list
->where
, &c
->where
);
9218 default_case
= body
;
9225 /* Transform SELECT TYPE statement to BLOCK and associate selector to
9226 target if present. If there are any EXIT statements referring to the
9227 SELECT TYPE construct, this is no problem because the gfc_code
9228 reference stays the same and EXIT is equally possible from the BLOCK
9229 it is changed to. */
9230 code
->op
= EXEC_BLOCK
;
9233 gfc_association_list
* assoc
;
9235 assoc
= gfc_get_association_list ();
9236 assoc
->st
= code
->expr1
->symtree
;
9237 assoc
->target
= gfc_copy_expr (code
->expr2
);
9238 assoc
->target
->where
= code
->expr2
->where
;
9239 /* assoc->variable will be set by resolve_assoc_var. */
9241 code
->ext
.block
.assoc
= assoc
;
9242 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
9244 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
9247 code
->ext
.block
.assoc
= NULL
;
9249 /* Ensure that the selector rank and arrayspec are available to
9250 correct expressions in which they might be missing. */
9251 if (code
->expr2
&& code
->expr2
->rank
)
9253 rank
= code
->expr2
->rank
;
9254 for (ref
= code
->expr2
->ref
; ref
; ref
= ref
->next
)
9255 if (ref
->next
== NULL
)
9257 if (ref
&& ref
->type
== REF_ARRAY
)
9258 ref
= gfc_copy_ref (ref
);
9260 /* Fixup expr1 if necessary. */
9262 fixup_array_ref (&code
->expr1
, code
->expr2
, rank
, ref
);
9264 else if (code
->expr1
->rank
)
9266 rank
= code
->expr1
->rank
;
9267 for (ref
= code
->expr1
->ref
; ref
; ref
= ref
->next
)
9268 if (ref
->next
== NULL
)
9270 if (ref
&& ref
->type
== REF_ARRAY
)
9271 ref
= gfc_copy_ref (ref
);
9274 /* Add EXEC_SELECT to switch on type. */
9275 new_st
= gfc_get_code (code
->op
);
9276 new_st
->expr1
= code
->expr1
;
9277 new_st
->expr2
= code
->expr2
;
9278 new_st
->block
= code
->block
;
9279 code
->expr1
= code
->expr2
= NULL
;
9284 ns
->code
->next
= new_st
;
9286 code
->op
= EXEC_SELECT_TYPE
;
9288 /* Use the intrinsic LOC function to generate an integer expression
9289 for the vtable of the selector. Note that the rank of the selector
9290 expression has to be set to zero. */
9291 gfc_add_vptr_component (code
->expr1
);
9292 code
->expr1
->rank
= 0;
9293 code
->expr1
= build_loc_call (code
->expr1
);
9294 selector_expr
= code
->expr1
->value
.function
.actual
->expr
;
9296 /* Loop over TYPE IS / CLASS IS cases. */
9297 for (body
= code
->block
; body
; body
= body
->block
)
9301 c
= body
->ext
.block
.case_list
;
9303 /* Generate an index integer expression for address of the
9304 TYPE/CLASS vtable and store it in c->low. The hash expression
9305 is stored in c->high and is used to resolve intrinsic cases. */
9306 if (c
->ts
.type
!= BT_UNKNOWN
)
9308 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9310 vtab
= gfc_find_derived_vtab (c
->ts
.u
.derived
);
9312 c
->high
= gfc_get_int_expr (gfc_integer_4_kind
, NULL
,
9313 c
->ts
.u
.derived
->hash_value
);
9317 vtab
= gfc_find_vtab (&c
->ts
);
9318 gcc_assert (vtab
&& CLASS_DATA (vtab
)->initializer
);
9319 e
= CLASS_DATA (vtab
)->initializer
;
9320 c
->high
= gfc_copy_expr (e
);
9321 if (c
->high
->ts
.kind
!= gfc_integer_4_kind
)
9324 ts
.kind
= gfc_integer_4_kind
;
9325 ts
.type
= BT_INTEGER
;
9326 gfc_convert_type_warn (c
->high
, &ts
, 2, 0);
9330 e
= gfc_lval_expr_from_sym (vtab
);
9331 c
->low
= build_loc_call (e
);
9336 /* Associate temporary to selector. This should only be done
9337 when this case is actually true, so build a new ASSOCIATE
9338 that does precisely this here (instead of using the
9341 if (c
->ts
.type
== BT_CLASS
)
9342 sprintf (name
, "__tmp_class_%s", c
->ts
.u
.derived
->name
);
9343 else if (c
->ts
.type
== BT_DERIVED
)
9344 sprintf (name
, "__tmp_type_%s", c
->ts
.u
.derived
->name
);
9345 else if (c
->ts
.type
== BT_CHARACTER
)
9347 HOST_WIDE_INT charlen
= 0;
9348 if (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9349 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9350 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9351 snprintf (name
, sizeof (name
),
9352 "__tmp_%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9353 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9356 sprintf (name
, "__tmp_%s_%d", gfc_basic_typename (c
->ts
.type
),
9359 st
= gfc_find_symtree (ns
->sym_root
, name
);
9360 gcc_assert (st
->n
.sym
->assoc
);
9361 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9362 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9363 if (c
->ts
.type
!= BT_CLASS
&& c
->ts
.type
!= BT_UNKNOWN
)
9365 gfc_add_data_component (st
->n
.sym
->assoc
->target
);
9366 /* Fixup the target expression if necessary. */
9368 fixup_array_ref (&st
->n
.sym
->assoc
->target
, NULL
, rank
, ref
);
9371 new_st
= gfc_get_code (EXEC_BLOCK
);
9372 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9373 new_st
->ext
.block
.ns
->code
= body
->next
;
9374 body
->next
= new_st
;
9376 /* Chain in the new list only if it is marked as dangling. Otherwise
9377 there is a CASE label overlap and this is already used. Just ignore,
9378 the error is diagnosed elsewhere. */
9379 if (st
->n
.sym
->assoc
->dangling
)
9381 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9382 st
->n
.sym
->assoc
->dangling
= 0;
9385 resolve_assoc_var (st
->n
.sym
, false);
9388 /* Take out CLASS IS cases for separate treatment. */
9390 while (body
&& body
->block
)
9392 if (body
->block
->ext
.block
.case_list
->ts
.type
== BT_CLASS
)
9394 /* Add to class_is list. */
9395 if (class_is
== NULL
)
9397 class_is
= body
->block
;
9402 for (tail
= class_is
; tail
->block
; tail
= tail
->block
) ;
9403 tail
->block
= body
->block
;
9406 /* Remove from EXEC_SELECT list. */
9407 body
->block
= body
->block
->block
;
9420 /* Add a default case to hold the CLASS IS cases. */
9421 for (tail
= code
; tail
->block
; tail
= tail
->block
) ;
9422 tail
->block
= gfc_get_code (EXEC_SELECT_TYPE
);
9424 tail
->ext
.block
.case_list
= gfc_get_case ();
9425 tail
->ext
.block
.case_list
->ts
.type
= BT_UNKNOWN
;
9427 default_case
= tail
;
9430 /* More than one CLASS IS block? */
9431 if (class_is
->block
)
9435 /* Sort CLASS IS blocks by extension level. */
9439 for (c1
= &class_is
; (*c1
) && (*c1
)->block
; c1
= &((*c1
)->block
))
9442 /* F03:C817 (check for doubles). */
9443 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->hash_value
9444 == c2
->ext
.block
.case_list
->ts
.u
.derived
->hash_value
)
9446 gfc_error ("Double CLASS IS block in SELECT TYPE "
9448 &c2
->ext
.block
.case_list
->where
);
9451 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
9452 < c2
->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
)
9455 (*c1
)->block
= c2
->block
;
9465 /* Generate IF chain. */
9466 if_st
= gfc_get_code (EXEC_IF
);
9468 for (body
= class_is
; body
; body
= body
->block
)
9470 new_st
->block
= gfc_get_code (EXEC_IF
);
9471 new_st
= new_st
->block
;
9472 /* Set up IF condition: Call _gfortran_is_extension_of. */
9473 new_st
->expr1
= gfc_get_expr ();
9474 new_st
->expr1
->expr_type
= EXPR_FUNCTION
;
9475 new_st
->expr1
->ts
.type
= BT_LOGICAL
;
9476 new_st
->expr1
->ts
.kind
= 4;
9477 new_st
->expr1
->value
.function
.name
= gfc_get_string (PREFIX ("is_extension_of"));
9478 new_st
->expr1
->value
.function
.isym
= XCNEW (gfc_intrinsic_sym
);
9479 new_st
->expr1
->value
.function
.isym
->id
= GFC_ISYM_EXTENDS_TYPE_OF
;
9480 /* Set up arguments. */
9481 new_st
->expr1
->value
.function
.actual
= gfc_get_actual_arglist ();
9482 new_st
->expr1
->value
.function
.actual
->expr
= gfc_get_variable_expr (selector_expr
->symtree
);
9483 new_st
->expr1
->value
.function
.actual
->expr
->where
= code
->loc
;
9484 new_st
->expr1
->where
= code
->loc
;
9485 gfc_add_vptr_component (new_st
->expr1
->value
.function
.actual
->expr
);
9486 vtab
= gfc_find_derived_vtab (body
->ext
.block
.case_list
->ts
.u
.derived
);
9487 st
= gfc_find_symtree (vtab
->ns
->sym_root
, vtab
->name
);
9488 new_st
->expr1
->value
.function
.actual
->next
= gfc_get_actual_arglist ();
9489 new_st
->expr1
->value
.function
.actual
->next
->expr
= gfc_get_variable_expr (st
);
9490 new_st
->expr1
->value
.function
.actual
->next
->expr
->where
= code
->loc
;
9491 new_st
->next
= body
->next
;
9493 if (default_case
->next
)
9495 new_st
->block
= gfc_get_code (EXEC_IF
);
9496 new_st
= new_st
->block
;
9497 new_st
->next
= default_case
->next
;
9500 /* Replace CLASS DEFAULT code by the IF chain. */
9501 default_case
->next
= if_st
;
9504 /* Resolve the internal code. This cannot be done earlier because
9505 it requires that the sym->assoc of selectors is set already. */
9506 gfc_current_ns
= ns
;
9507 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9508 gfc_current_ns
= old_ns
;
9515 /* Resolve a SELECT RANK statement. */
9518 resolve_select_rank (gfc_code
*code
, gfc_namespace
*old_ns
)
9521 gfc_code
*body
, *new_st
, *tail
;
9523 char tname
[GFC_MAX_SYMBOL_LEN
];
9524 char name
[2 * GFC_MAX_SYMBOL_LEN
];
9526 gfc_expr
*selector_expr
= NULL
;
9528 HOST_WIDE_INT charlen
= 0;
9530 ns
= code
->ext
.block
.ns
;
9533 code
->op
= EXEC_BLOCK
;
9536 gfc_association_list
* assoc
;
9538 assoc
= gfc_get_association_list ();
9539 assoc
->st
= code
->expr1
->symtree
;
9540 assoc
->target
= gfc_copy_expr (code
->expr2
);
9541 assoc
->target
->where
= code
->expr2
->where
;
9542 /* assoc->variable will be set by resolve_assoc_var. */
9544 code
->ext
.block
.assoc
= assoc
;
9545 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
9547 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
9550 code
->ext
.block
.assoc
= NULL
;
9552 /* Loop over RANK cases. Note that returning on the errors causes a
9553 cascade of further errors because the case blocks do not compile
9555 for (body
= code
->block
; body
; body
= body
->block
)
9557 c
= body
->ext
.block
.case_list
;
9559 case_value
= (int) mpz_get_si (c
->low
->value
.integer
);
9563 /* Check for repeated cases. */
9564 for (tail
= code
->block
; tail
; tail
= tail
->block
)
9566 gfc_case
*d
= tail
->ext
.block
.case_list
;
9572 /* Check F2018: C1153. */
9573 if (!c
->low
&& !d
->low
)
9574 gfc_error ("RANK DEFAULT at %L is repeated at %L",
9575 &c
->where
, &d
->where
);
9577 if (!c
->low
|| !d
->low
)
9580 /* Check F2018: C1153. */
9581 case_value2
= (int) mpz_get_si (d
->low
->value
.integer
);
9582 if ((case_value
== case_value2
) && case_value
== -1)
9583 gfc_error ("RANK (*) at %L is repeated at %L",
9584 &c
->where
, &d
->where
);
9585 else if (case_value
== case_value2
)
9586 gfc_error ("RANK (%i) at %L is repeated at %L",
9587 case_value
, &c
->where
, &d
->where
);
9593 /* Check F2018: C1155. */
9594 if (case_value
== -1 && (gfc_expr_attr (code
->expr1
).allocatable
9595 || gfc_expr_attr (code
->expr1
).pointer
))
9596 gfc_error ("RANK (*) at %L cannot be used with the pointer or "
9597 "allocatable selector at %L", &c
->where
, &code
->expr1
->where
);
9599 if (case_value
== -1 && (gfc_expr_attr (code
->expr1
).allocatable
9600 || gfc_expr_attr (code
->expr1
).pointer
))
9601 gfc_error ("RANK (*) at %L cannot be used with the pointer or "
9602 "allocatable selector at %L", &c
->where
, &code
->expr1
->where
);
9605 /* Add EXEC_SELECT to switch on rank. */
9606 new_st
= gfc_get_code (code
->op
);
9607 new_st
->expr1
= code
->expr1
;
9608 new_st
->expr2
= code
->expr2
;
9609 new_st
->block
= code
->block
;
9610 code
->expr1
= code
->expr2
= NULL
;
9615 ns
->code
->next
= new_st
;
9617 code
->op
= EXEC_SELECT_RANK
;
9619 selector_expr
= code
->expr1
;
9621 /* Loop over SELECT RANK cases. */
9622 for (body
= code
->block
; body
; body
= body
->block
)
9624 c
= body
->ext
.block
.case_list
;
9627 /* Pass on the default case. */
9631 /* Associate temporary to selector. This should only be done
9632 when this case is actually true, so build a new ASSOCIATE
9633 that does precisely this here (instead of using the
9635 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9636 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9637 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9639 if (c
->ts
.type
== BT_CLASS
)
9640 sprintf (tname
, "class_%s", c
->ts
.u
.derived
->name
);
9641 else if (c
->ts
.type
== BT_DERIVED
)
9642 sprintf (tname
, "type_%s", c
->ts
.u
.derived
->name
);
9643 else if (c
->ts
.type
!= BT_CHARACTER
)
9644 sprintf (tname
, "%s_%d", gfc_basic_typename (c
->ts
.type
), c
->ts
.kind
);
9646 sprintf (tname
, "%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9647 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9649 case_value
= (int) mpz_get_si (c
->low
->value
.integer
);
9650 if (case_value
>= 0)
9651 sprintf (name
, "__tmp_%s_rank_%d", tname
, case_value
);
9653 sprintf (name
, "__tmp_%s_rank_m%d", tname
, -case_value
);
9655 st
= gfc_find_symtree (ns
->sym_root
, name
);
9656 gcc_assert (st
->n
.sym
->assoc
);
9658 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9659 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9661 new_st
= gfc_get_code (EXEC_BLOCK
);
9662 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9663 new_st
->ext
.block
.ns
->code
= body
->next
;
9664 body
->next
= new_st
;
9666 /* Chain in the new list only if it is marked as dangling. Otherwise
9667 there is a CASE label overlap and this is already used. Just ignore,
9668 the error is diagnosed elsewhere. */
9669 if (st
->n
.sym
->assoc
->dangling
)
9671 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9672 st
->n
.sym
->assoc
->dangling
= 0;
9675 resolve_assoc_var (st
->n
.sym
, false);
9678 gfc_current_ns
= ns
;
9679 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9680 gfc_current_ns
= old_ns
;
9684 /* Resolve a transfer statement. This is making sure that:
9685 -- a derived type being transferred has only non-pointer components
9686 -- a derived type being transferred doesn't have private components, unless
9687 it's being transferred from the module where the type was defined
9688 -- we're not trying to transfer a whole assumed size array. */
9691 resolve_transfer (gfc_code
*code
)
9693 gfc_symbol
*sym
, *derived
;
9697 bool formatted
= false;
9698 gfc_dt
*dt
= code
->ext
.dt
;
9699 gfc_symbol
*dtio_sub
= NULL
;
9703 while (exp
!= NULL
&& exp
->expr_type
== EXPR_OP
9704 && exp
->value
.op
.op
== INTRINSIC_PARENTHESES
)
9705 exp
= exp
->value
.op
.op1
;
9707 if (exp
&& exp
->expr_type
== EXPR_NULL
9710 gfc_error ("Invalid context for NULL () intrinsic at %L",
9715 if (exp
== NULL
|| (exp
->expr_type
!= EXPR_VARIABLE
9716 && exp
->expr_type
!= EXPR_FUNCTION
9717 && exp
->expr_type
!= EXPR_STRUCTURE
))
9720 /* If we are reading, the variable will be changed. Note that
9721 code->ext.dt may be NULL if the TRANSFER is related to
9722 an INQUIRE statement -- but in this case, we are not reading, either. */
9723 if (dt
&& dt
->dt_io_kind
->value
.iokind
== M_READ
9724 && !gfc_check_vardef_context (exp
, false, false, false,
9728 const gfc_typespec
*ts
= exp
->expr_type
== EXPR_STRUCTURE
9729 || exp
->expr_type
== EXPR_FUNCTION
9730 ? &exp
->ts
: &exp
->symtree
->n
.sym
->ts
;
9732 /* Go to actual component transferred. */
9733 for (ref
= exp
->ref
; ref
; ref
= ref
->next
)
9734 if (ref
->type
== REF_COMPONENT
)
9735 ts
= &ref
->u
.c
.component
->ts
;
9737 if (dt
&& dt
->dt_io_kind
->value
.iokind
!= M_INQUIRE
9738 && (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
))
9740 derived
= ts
->u
.derived
;
9742 /* Determine when to use the formatted DTIO procedure. */
9743 if (dt
&& (dt
->format_expr
|| dt
->format_label
))
9746 write
= dt
->dt_io_kind
->value
.iokind
== M_WRITE
9747 || dt
->dt_io_kind
->value
.iokind
== M_PRINT
;
9748 dtio_sub
= gfc_find_specific_dtio_proc (derived
, write
, formatted
);
9750 if (dtio_sub
!= NULL
&& exp
->expr_type
== EXPR_VARIABLE
)
9753 sym
= exp
->symtree
->n
.sym
->ns
->proc_name
;
9754 /* Check to see if this is a nested DTIO call, with the
9755 dummy as the io-list object. */
9756 if (sym
&& sym
== dtio_sub
&& sym
->formal
9757 && sym
->formal
->sym
== exp
->symtree
->n
.sym
9758 && exp
->ref
== NULL
)
9760 if (!sym
->attr
.recursive
)
9762 gfc_error ("DTIO %s procedure at %L must be recursive",
9763 sym
->name
, &sym
->declared_at
);
9770 if (ts
->type
== BT_CLASS
&& dtio_sub
== NULL
)
9772 gfc_error ("Data transfer element at %L cannot be polymorphic unless "
9773 "it is processed by a defined input/output procedure",
9778 if (ts
->type
== BT_DERIVED
)
9780 /* Check that transferred derived type doesn't contain POINTER
9781 components unless it is processed by a defined input/output
9783 if (ts
->u
.derived
->attr
.pointer_comp
&& dtio_sub
== NULL
)
9785 gfc_error ("Data transfer element at %L cannot have POINTER "
9786 "components unless it is processed by a defined "
9787 "input/output procedure", &code
->loc
);
9792 if (ts
->u
.derived
->attr
.proc_pointer_comp
)
9794 gfc_error ("Data transfer element at %L cannot have "
9795 "procedure pointer components", &code
->loc
);
9799 if (ts
->u
.derived
->attr
.alloc_comp
&& dtio_sub
== NULL
)
9801 gfc_error ("Data transfer element at %L cannot have ALLOCATABLE "
9802 "components unless it is processed by a defined "
9803 "input/output procedure", &code
->loc
);
9807 /* C_PTR and C_FUNPTR have private components which means they cannot
9808 be printed. However, if -std=gnu and not -pedantic, allow
9809 the component to be printed to help debugging. */
9810 if (ts
->u
.derived
->ts
.f90_type
== BT_VOID
)
9812 if (!gfc_notify_std (GFC_STD_GNU
, "Data transfer element at %L "
9813 "cannot have PRIVATE components", &code
->loc
))
9816 else if (derived_inaccessible (ts
->u
.derived
) && dtio_sub
== NULL
)
9818 gfc_error ("Data transfer element at %L cannot have "
9819 "PRIVATE components unless it is processed by "
9820 "a defined input/output procedure", &code
->loc
);
9825 if (exp
->expr_type
== EXPR_STRUCTURE
)
9828 sym
= exp
->symtree
->n
.sym
;
9830 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SIZE
&& exp
->ref
9831 && exp
->ref
->type
== REF_ARRAY
&& exp
->ref
->u
.ar
.type
== AR_FULL
)
9833 gfc_error ("Data transfer element at %L cannot be a full reference to "
9834 "an assumed-size array", &code
->loc
);
9838 if (async_io_dt
&& exp
->expr_type
== EXPR_VARIABLE
)
9839 exp
->symtree
->n
.sym
->attr
.asynchronous
= 1;
9843 /*********** Toplevel code resolution subroutines ***********/
9845 /* Find the set of labels that are reachable from this block. We also
9846 record the last statement in each block. */
9849 find_reachable_labels (gfc_code
*block
)
9856 cs_base
->reachable_labels
= bitmap_alloc (&labels_obstack
);
9858 /* Collect labels in this block. We don't keep those corresponding
9859 to END {IF|SELECT}, these are checked in resolve_branch by going
9860 up through the code_stack. */
9861 for (c
= block
; c
; c
= c
->next
)
9863 if (c
->here
&& c
->op
!= EXEC_END_NESTED_BLOCK
)
9864 bitmap_set_bit (cs_base
->reachable_labels
, c
->here
->value
);
9867 /* Merge with labels from parent block. */
9870 gcc_assert (cs_base
->prev
->reachable_labels
);
9871 bitmap_ior_into (cs_base
->reachable_labels
,
9872 cs_base
->prev
->reachable_labels
);
9878 resolve_lock_unlock_event (gfc_code
*code
)
9880 if (code
->expr1
->expr_type
== EXPR_FUNCTION
9881 && code
->expr1
->value
.function
.isym
9882 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
9883 remove_caf_get_intrinsic (code
->expr1
);
9885 if ((code
->op
== EXEC_LOCK
|| code
->op
== EXEC_UNLOCK
)
9886 && (code
->expr1
->ts
.type
!= BT_DERIVED
9887 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9888 || code
->expr1
->ts
.u
.derived
->from_intmod
!= INTMOD_ISO_FORTRAN_ENV
9889 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
!= ISOFORTRAN_LOCK_TYPE
9890 || code
->expr1
->rank
!= 0
9891 || (!gfc_is_coarray (code
->expr1
) &&
9892 !gfc_is_coindexed (code
->expr1
))))
9893 gfc_error ("Lock variable at %L must be a scalar of type LOCK_TYPE",
9894 &code
->expr1
->where
);
9895 else if ((code
->op
== EXEC_EVENT_POST
|| code
->op
== EXEC_EVENT_WAIT
)
9896 && (code
->expr1
->ts
.type
!= BT_DERIVED
9897 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9898 || code
->expr1
->ts
.u
.derived
->from_intmod
9899 != INTMOD_ISO_FORTRAN_ENV
9900 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
9901 != ISOFORTRAN_EVENT_TYPE
9902 || code
->expr1
->rank
!= 0))
9903 gfc_error ("Event variable at %L must be a scalar of type EVENT_TYPE",
9904 &code
->expr1
->where
);
9905 else if (code
->op
== EXEC_EVENT_POST
&& !gfc_is_coarray (code
->expr1
)
9906 && !gfc_is_coindexed (code
->expr1
))
9907 gfc_error ("Event variable argument at %L must be a coarray or coindexed",
9908 &code
->expr1
->where
);
9909 else if (code
->op
== EXEC_EVENT_WAIT
&& !gfc_is_coarray (code
->expr1
))
9910 gfc_error ("Event variable argument at %L must be a coarray but not "
9911 "coindexed", &code
->expr1
->where
);
9915 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9916 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9917 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9918 &code
->expr2
->where
);
9921 && !gfc_check_vardef_context (code
->expr2
, false, false, false,
9922 _("STAT variable")))
9927 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9928 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9929 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9930 &code
->expr3
->where
);
9933 && !gfc_check_vardef_context (code
->expr3
, false, false, false,
9934 _("ERRMSG variable")))
9937 /* Check for LOCK the ACQUIRED_LOCK. */
9938 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9939 && (code
->expr4
->ts
.type
!= BT_LOGICAL
|| code
->expr4
->rank
!= 0
9940 || code
->expr4
->expr_type
!= EXPR_VARIABLE
))
9941 gfc_error ("ACQUIRED_LOCK= argument at %L must be a scalar LOGICAL "
9942 "variable", &code
->expr4
->where
);
9944 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9945 && !gfc_check_vardef_context (code
->expr4
, false, false, false,
9946 _("ACQUIRED_LOCK variable")))
9949 /* Check for EVENT WAIT the UNTIL_COUNT. */
9950 if (code
->op
== EXEC_EVENT_WAIT
&& code
->expr4
)
9952 if (!gfc_resolve_expr (code
->expr4
) || code
->expr4
->ts
.type
!= BT_INTEGER
9953 || code
->expr4
->rank
!= 0)
9954 gfc_error ("UNTIL_COUNT= argument at %L must be a scalar INTEGER "
9955 "expression", &code
->expr4
->where
);
9961 resolve_critical (gfc_code
*code
)
9963 gfc_symtree
*symtree
;
9964 gfc_symbol
*lock_type
;
9965 char name
[GFC_MAX_SYMBOL_LEN
];
9966 static int serial
= 0;
9968 if (flag_coarray
!= GFC_FCOARRAY_LIB
)
9971 symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
9972 GFC_PREFIX ("lock_type"));
9974 lock_type
= symtree
->n
.sym
;
9977 if (gfc_get_sym_tree (GFC_PREFIX ("lock_type"), gfc_current_ns
, &symtree
,
9980 lock_type
= symtree
->n
.sym
;
9981 lock_type
->attr
.flavor
= FL_DERIVED
;
9982 lock_type
->attr
.zero_comp
= 1;
9983 lock_type
->from_intmod
= INTMOD_ISO_FORTRAN_ENV
;
9984 lock_type
->intmod_sym_id
= ISOFORTRAN_LOCK_TYPE
;
9987 sprintf(name
, GFC_PREFIX ("lock_var") "%d",serial
++);
9988 if (gfc_get_sym_tree (name
, gfc_current_ns
, &symtree
, false) != 0)
9991 code
->resolved_sym
= symtree
->n
.sym
;
9992 symtree
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
9993 symtree
->n
.sym
->attr
.referenced
= 1;
9994 symtree
->n
.sym
->attr
.artificial
= 1;
9995 symtree
->n
.sym
->attr
.codimension
= 1;
9996 symtree
->n
.sym
->ts
.type
= BT_DERIVED
;
9997 symtree
->n
.sym
->ts
.u
.derived
= lock_type
;
9998 symtree
->n
.sym
->as
= gfc_get_array_spec ();
9999 symtree
->n
.sym
->as
->corank
= 1;
10000 symtree
->n
.sym
->as
->type
= AS_EXPLICIT
;
10001 symtree
->n
.sym
->as
->cotype
= AS_EXPLICIT
;
10002 symtree
->n
.sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
,
10004 gfc_commit_symbols();
10009 resolve_sync (gfc_code
*code
)
10011 /* Check imageset. The * case matches expr1 == NULL. */
10014 if (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
> 1)
10015 gfc_error ("Imageset argument at %L must be a scalar or rank-1 "
10016 "INTEGER expression", &code
->expr1
->where
);
10017 if (code
->expr1
->expr_type
== EXPR_CONSTANT
&& code
->expr1
->rank
== 0
10018 && mpz_cmp_si (code
->expr1
->value
.integer
, 1) < 0)
10019 gfc_error ("Imageset argument at %L must between 1 and num_images()",
10020 &code
->expr1
->where
);
10021 else if (code
->expr1
->expr_type
== EXPR_ARRAY
10022 && gfc_simplify_expr (code
->expr1
, 0))
10024 gfc_constructor
*cons
;
10025 cons
= gfc_constructor_first (code
->expr1
->value
.constructor
);
10026 for (; cons
; cons
= gfc_constructor_next (cons
))
10027 if (cons
->expr
->expr_type
== EXPR_CONSTANT
10028 && mpz_cmp_si (cons
->expr
->value
.integer
, 1) < 0)
10029 gfc_error ("Imageset argument at %L must between 1 and "
10030 "num_images()", &cons
->expr
->where
);
10035 gfc_resolve_expr (code
->expr2
);
10037 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
10038 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
10039 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
10040 &code
->expr2
->where
);
10042 /* Check ERRMSG. */
10043 gfc_resolve_expr (code
->expr3
);
10045 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
10046 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
10047 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
10048 &code
->expr3
->where
);
10052 /* Given a branch to a label, see if the branch is conforming.
10053 The code node describes where the branch is located. */
10056 resolve_branch (gfc_st_label
*label
, gfc_code
*code
)
10063 /* Step one: is this a valid branching target? */
10065 if (label
->defined
== ST_LABEL_UNKNOWN
)
10067 gfc_error ("Label %d referenced at %L is never defined", label
->value
,
10072 if (label
->defined
!= ST_LABEL_TARGET
&& label
->defined
!= ST_LABEL_DO_TARGET
)
10074 gfc_error ("Statement at %L is not a valid branch target statement "
10075 "for the branch statement at %L", &label
->where
, &code
->loc
);
10079 /* Step two: make sure this branch is not a branch to itself ;-) */
10081 if (code
->here
== label
)
10084 "Branch at %L may result in an infinite loop", &code
->loc
);
10088 /* Step three: See if the label is in the same block as the
10089 branching statement. The hard work has been done by setting up
10090 the bitmap reachable_labels. */
10092 if (bitmap_bit_p (cs_base
->reachable_labels
, label
->value
))
10094 /* Check now whether there is a CRITICAL construct; if so, check
10095 whether the label is still visible outside of the CRITICAL block,
10096 which is invalid. */
10097 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
10099 if (stack
->current
->op
== EXEC_CRITICAL
10100 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
10101 gfc_error ("GOTO statement at %L leaves CRITICAL construct for "
10102 "label at %L", &code
->loc
, &label
->where
);
10103 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
10104 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
10105 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct "
10106 "for label at %L", &code
->loc
, &label
->where
);
10112 /* Step four: If we haven't found the label in the bitmap, it may
10113 still be the label of the END of the enclosing block, in which
10114 case we find it by going up the code_stack. */
10116 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
10118 if (stack
->current
->next
&& stack
->current
->next
->here
== label
)
10120 if (stack
->current
->op
== EXEC_CRITICAL
)
10122 /* Note: A label at END CRITICAL does not leave the CRITICAL
10123 construct as END CRITICAL is still part of it. */
10124 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
10125 " at %L", &code
->loc
, &label
->where
);
10128 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
)
10130 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct for "
10131 "label at %L", &code
->loc
, &label
->where
);
10138 gcc_assert (stack
->current
->next
->op
== EXEC_END_NESTED_BLOCK
);
10142 /* The label is not in an enclosing block, so illegal. This was
10143 allowed in Fortran 66, so we allow it as extension. No
10144 further checks are necessary in this case. */
10145 gfc_notify_std (GFC_STD_LEGACY
, "Label at %L is not in the same block "
10146 "as the GOTO statement at %L", &label
->where
,
10152 /* Check whether EXPR1 has the same shape as EXPR2. */
10155 resolve_where_shape (gfc_expr
*expr1
, gfc_expr
*expr2
)
10157 mpz_t shape
[GFC_MAX_DIMENSIONS
];
10158 mpz_t shape2
[GFC_MAX_DIMENSIONS
];
10159 bool result
= false;
10162 /* Compare the rank. */
10163 if (expr1
->rank
!= expr2
->rank
)
10166 /* Compare the size of each dimension. */
10167 for (i
=0; i
<expr1
->rank
; i
++)
10169 if (!gfc_array_dimen_size (expr1
, i
, &shape
[i
]))
10172 if (!gfc_array_dimen_size (expr2
, i
, &shape2
[i
]))
10175 if (mpz_cmp (shape
[i
], shape2
[i
]))
10179 /* When either of the two expression is an assumed size array, we
10180 ignore the comparison of dimension sizes. */
10185 gfc_clear_shape (shape
, i
);
10186 gfc_clear_shape (shape2
, i
);
10191 /* Check whether a WHERE assignment target or a WHERE mask expression
10192 has the same shape as the outmost WHERE mask expression. */
10195 resolve_where (gfc_code
*code
, gfc_expr
*mask
)
10199 gfc_expr
*e
= NULL
;
10201 cblock
= code
->block
;
10203 /* Store the first WHERE mask-expr of the WHERE statement or construct.
10204 In case of nested WHERE, only the outmost one is stored. */
10205 if (mask
== NULL
) /* outmost WHERE */
10207 else /* inner WHERE */
10214 /* Check if the mask-expr has a consistent shape with the
10215 outmost WHERE mask-expr. */
10216 if (!resolve_where_shape (cblock
->expr1
, e
))
10217 gfc_error ("WHERE mask at %L has inconsistent shape",
10218 &cblock
->expr1
->where
);
10221 /* the assignment statement of a WHERE statement, or the first
10222 statement in where-body-construct of a WHERE construct */
10223 cnext
= cblock
->next
;
10228 /* WHERE assignment statement */
10231 /* Check shape consistent for WHERE assignment target. */
10232 if (e
&& !resolve_where_shape (cnext
->expr1
, e
))
10233 gfc_error ("WHERE assignment target at %L has "
10234 "inconsistent shape", &cnext
->expr1
->where
);
10238 case EXEC_ASSIGN_CALL
:
10239 resolve_call (cnext
);
10240 if (!cnext
->resolved_sym
->attr
.elemental
)
10241 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
10242 &cnext
->ext
.actual
->expr
->where
);
10245 /* WHERE or WHERE construct is part of a where-body-construct */
10247 resolve_where (cnext
, e
);
10251 gfc_error ("Unsupported statement inside WHERE at %L",
10254 /* the next statement within the same where-body-construct */
10255 cnext
= cnext
->next
;
10257 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
10258 cblock
= cblock
->block
;
10263 /* Resolve assignment in FORALL construct.
10264 NVAR is the number of FORALL index variables, and VAR_EXPR records the
10265 FORALL index variables. */
10268 gfc_resolve_assign_in_forall (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
10272 for (n
= 0; n
< nvar
; n
++)
10274 gfc_symbol
*forall_index
;
10276 forall_index
= var_expr
[n
]->symtree
->n
.sym
;
10278 /* Check whether the assignment target is one of the FORALL index
10280 if ((code
->expr1
->expr_type
== EXPR_VARIABLE
)
10281 && (code
->expr1
->symtree
->n
.sym
== forall_index
))
10282 gfc_error ("Assignment to a FORALL index variable at %L",
10283 &code
->expr1
->where
);
10286 /* If one of the FORALL index variables doesn't appear in the
10287 assignment variable, then there could be a many-to-one
10288 assignment. Emit a warning rather than an error because the
10289 mask could be resolving this problem. */
10290 if (!find_forall_index (code
->expr1
, forall_index
, 0))
10291 gfc_warning (0, "The FORALL with index %qs is not used on the "
10292 "left side of the assignment at %L and so might "
10293 "cause multiple assignment to this object",
10294 var_expr
[n
]->symtree
->name
, &code
->expr1
->where
);
10300 /* Resolve WHERE statement in FORALL construct. */
10303 gfc_resolve_where_code_in_forall (gfc_code
*code
, int nvar
,
10304 gfc_expr
**var_expr
)
10309 cblock
= code
->block
;
10312 /* the assignment statement of a WHERE statement, or the first
10313 statement in where-body-construct of a WHERE construct */
10314 cnext
= cblock
->next
;
10319 /* WHERE assignment statement */
10321 gfc_resolve_assign_in_forall (cnext
, nvar
, var_expr
);
10324 /* WHERE operator assignment statement */
10325 case EXEC_ASSIGN_CALL
:
10326 resolve_call (cnext
);
10327 if (!cnext
->resolved_sym
->attr
.elemental
)
10328 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
10329 &cnext
->ext
.actual
->expr
->where
);
10332 /* WHERE or WHERE construct is part of a where-body-construct */
10334 gfc_resolve_where_code_in_forall (cnext
, nvar
, var_expr
);
10338 gfc_error ("Unsupported statement inside WHERE at %L",
10341 /* the next statement within the same where-body-construct */
10342 cnext
= cnext
->next
;
10344 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
10345 cblock
= cblock
->block
;
10350 /* Traverse the FORALL body to check whether the following errors exist:
10351 1. For assignment, check if a many-to-one assignment happens.
10352 2. For WHERE statement, check the WHERE body to see if there is any
10353 many-to-one assignment. */
10356 gfc_resolve_forall_body (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
10360 c
= code
->block
->next
;
10366 case EXEC_POINTER_ASSIGN
:
10367 gfc_resolve_assign_in_forall (c
, nvar
, var_expr
);
10370 case EXEC_ASSIGN_CALL
:
10374 /* Because the gfc_resolve_blocks() will handle the nested FORALL,
10375 there is no need to handle it here. */
10379 gfc_resolve_where_code_in_forall(c
, nvar
, var_expr
);
10384 /* The next statement in the FORALL body. */
10390 /* Counts the number of iterators needed inside a forall construct, including
10391 nested forall constructs. This is used to allocate the needed memory
10392 in gfc_resolve_forall. */
10395 gfc_count_forall_iterators (gfc_code
*code
)
10397 int max_iters
, sub_iters
, current_iters
;
10398 gfc_forall_iterator
*fa
;
10400 gcc_assert(code
->op
== EXEC_FORALL
);
10404 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10407 code
= code
->block
->next
;
10411 if (code
->op
== EXEC_FORALL
)
10413 sub_iters
= gfc_count_forall_iterators (code
);
10414 if (sub_iters
> max_iters
)
10415 max_iters
= sub_iters
;
10420 return current_iters
+ max_iters
;
10424 /* Given a FORALL construct, first resolve the FORALL iterator, then call
10425 gfc_resolve_forall_body to resolve the FORALL body. */
10428 gfc_resolve_forall (gfc_code
*code
, gfc_namespace
*ns
, int forall_save
)
10430 static gfc_expr
**var_expr
;
10431 static int total_var
= 0;
10432 static int nvar
= 0;
10433 int i
, old_nvar
, tmp
;
10434 gfc_forall_iterator
*fa
;
10438 if (!gfc_notify_std (GFC_STD_F2018_OBS
, "FORALL construct at %L", &code
->loc
))
10441 /* Start to resolve a FORALL construct */
10442 if (forall_save
== 0)
10444 /* Count the total number of FORALL indices in the nested FORALL
10445 construct in order to allocate the VAR_EXPR with proper size. */
10446 total_var
= gfc_count_forall_iterators (code
);
10448 /* Allocate VAR_EXPR with NUMBER_OF_FORALL_INDEX elements. */
10449 var_expr
= XCNEWVEC (gfc_expr
*, total_var
);
10452 /* The information about FORALL iterator, including FORALL indices start, end
10453 and stride. An outer FORALL indice cannot appear in start, end or stride. */
10454 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10456 /* Fortran 20008: C738 (R753). */
10457 if (fa
->var
->ref
&& fa
->var
->ref
->type
== REF_ARRAY
)
10459 gfc_error ("FORALL index-name at %L must be a scalar variable "
10460 "of type integer", &fa
->var
->where
);
10464 /* Check if any outer FORALL index name is the same as the current
10466 for (i
= 0; i
< nvar
; i
++)
10468 if (fa
->var
->symtree
->n
.sym
== var_expr
[i
]->symtree
->n
.sym
)
10469 gfc_error ("An outer FORALL construct already has an index "
10470 "with this name %L", &fa
->var
->where
);
10473 /* Record the current FORALL index. */
10474 var_expr
[nvar
] = gfc_copy_expr (fa
->var
);
10478 /* No memory leak. */
10479 gcc_assert (nvar
<= total_var
);
10482 /* Resolve the FORALL body. */
10483 gfc_resolve_forall_body (code
, nvar
, var_expr
);
10485 /* May call gfc_resolve_forall to resolve the inner FORALL loop. */
10486 gfc_resolve_blocks (code
->block
, ns
);
10490 /* Free only the VAR_EXPRs allocated in this frame. */
10491 for (i
= nvar
; i
< tmp
; i
++)
10492 gfc_free_expr (var_expr
[i
]);
10496 /* We are in the outermost FORALL construct. */
10497 gcc_assert (forall_save
== 0);
10499 /* VAR_EXPR is not needed any more. */
10506 /* Resolve a BLOCK construct statement. */
10509 resolve_block_construct (gfc_code
* code
)
10511 /* Resolve the BLOCK's namespace. */
10512 gfc_resolve (code
->ext
.block
.ns
);
10514 /* For an ASSOCIATE block, the associations (and their targets) are already
10515 resolved during resolve_symbol. */
10519 /* Resolve lists of blocks found in IF, SELECT CASE, WHERE, FORALL, GOTO and
10523 gfc_resolve_blocks (gfc_code
*b
, gfc_namespace
*ns
)
10527 for (; b
; b
= b
->block
)
10529 t
= gfc_resolve_expr (b
->expr1
);
10530 if (!gfc_resolve_expr (b
->expr2
))
10536 if (t
&& b
->expr1
!= NULL
10537 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
!= 0))
10538 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
10544 && b
->expr1
!= NULL
10545 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
== 0))
10546 gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
10551 resolve_branch (b
->label1
, b
);
10555 resolve_block_construct (b
);
10559 case EXEC_SELECT_TYPE
:
10560 case EXEC_SELECT_RANK
:
10563 case EXEC_DO_WHILE
:
10564 case EXEC_DO_CONCURRENT
:
10565 case EXEC_CRITICAL
:
10568 case EXEC_IOLENGTH
:
10572 case EXEC_OMP_ATOMIC
:
10573 case EXEC_OACC_ATOMIC
:
10575 gfc_omp_atomic_op aop
10576 = (gfc_omp_atomic_op
) (b
->ext
.omp_atomic
& GFC_OMP_ATOMIC_MASK
);
10578 /* Verify this before calling gfc_resolve_code, which might
10580 gcc_assert (b
->next
&& b
->next
->op
== EXEC_ASSIGN
);
10581 gcc_assert (((aop
!= GFC_OMP_ATOMIC_CAPTURE
)
10582 && b
->next
->next
== NULL
)
10583 || ((aop
== GFC_OMP_ATOMIC_CAPTURE
)
10584 && b
->next
->next
!= NULL
10585 && b
->next
->next
->op
== EXEC_ASSIGN
10586 && b
->next
->next
->next
== NULL
));
10590 case EXEC_OACC_PARALLEL_LOOP
:
10591 case EXEC_OACC_PARALLEL
:
10592 case EXEC_OACC_KERNELS_LOOP
:
10593 case EXEC_OACC_KERNELS
:
10594 case EXEC_OACC_DATA
:
10595 case EXEC_OACC_HOST_DATA
:
10596 case EXEC_OACC_LOOP
:
10597 case EXEC_OACC_UPDATE
:
10598 case EXEC_OACC_WAIT
:
10599 case EXEC_OACC_CACHE
:
10600 case EXEC_OACC_ENTER_DATA
:
10601 case EXEC_OACC_EXIT_DATA
:
10602 case EXEC_OACC_ROUTINE
:
10603 case EXEC_OMP_CRITICAL
:
10604 case EXEC_OMP_DISTRIBUTE
:
10605 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
10606 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
10607 case EXEC_OMP_DISTRIBUTE_SIMD
:
10609 case EXEC_OMP_DO_SIMD
:
10610 case EXEC_OMP_MASTER
:
10611 case EXEC_OMP_ORDERED
:
10612 case EXEC_OMP_PARALLEL
:
10613 case EXEC_OMP_PARALLEL_DO
:
10614 case EXEC_OMP_PARALLEL_DO_SIMD
:
10615 case EXEC_OMP_PARALLEL_SECTIONS
:
10616 case EXEC_OMP_PARALLEL_WORKSHARE
:
10617 case EXEC_OMP_SECTIONS
:
10618 case EXEC_OMP_SIMD
:
10619 case EXEC_OMP_SINGLE
:
10620 case EXEC_OMP_TARGET
:
10621 case EXEC_OMP_TARGET_DATA
:
10622 case EXEC_OMP_TARGET_ENTER_DATA
:
10623 case EXEC_OMP_TARGET_EXIT_DATA
:
10624 case EXEC_OMP_TARGET_PARALLEL
:
10625 case EXEC_OMP_TARGET_PARALLEL_DO
:
10626 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
10627 case EXEC_OMP_TARGET_SIMD
:
10628 case EXEC_OMP_TARGET_TEAMS
:
10629 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
10630 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10631 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10632 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
10633 case EXEC_OMP_TARGET_UPDATE
:
10634 case EXEC_OMP_TASK
:
10635 case EXEC_OMP_TASKGROUP
:
10636 case EXEC_OMP_TASKLOOP
:
10637 case EXEC_OMP_TASKLOOP_SIMD
:
10638 case EXEC_OMP_TASKWAIT
:
10639 case EXEC_OMP_TASKYIELD
:
10640 case EXEC_OMP_TEAMS
:
10641 case EXEC_OMP_TEAMS_DISTRIBUTE
:
10642 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10643 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10644 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
10645 case EXEC_OMP_WORKSHARE
:
10649 gfc_internal_error ("gfc_resolve_blocks(): Bad block type");
10652 gfc_resolve_code (b
->next
, ns
);
10657 /* Does everything to resolve an ordinary assignment. Returns true
10658 if this is an interface assignment. */
10660 resolve_ordinary_assign (gfc_code
*code
, gfc_namespace
*ns
)
10667 symbol_attribute attr
;
10669 if (gfc_extend_assign (code
, ns
))
10673 if (code
->op
== EXEC_ASSIGN_CALL
)
10675 lhs
= code
->ext
.actual
->expr
;
10676 rhsptr
= &code
->ext
.actual
->next
->expr
;
10680 gfc_actual_arglist
* args
;
10681 gfc_typebound_proc
* tbp
;
10683 gcc_assert (code
->op
== EXEC_COMPCALL
);
10685 args
= code
->expr1
->value
.compcall
.actual
;
10687 rhsptr
= &args
->next
->expr
;
10689 tbp
= code
->expr1
->value
.compcall
.tbp
;
10690 gcc_assert (!tbp
->is_generic
);
10693 /* Make a temporary rhs when there is a default initializer
10694 and rhs is the same symbol as the lhs. */
10695 if ((*rhsptr
)->expr_type
== EXPR_VARIABLE
10696 && (*rhsptr
)->symtree
->n
.sym
->ts
.type
== BT_DERIVED
10697 && gfc_has_default_initializer ((*rhsptr
)->symtree
->n
.sym
->ts
.u
.derived
)
10698 && (lhs
->symtree
->n
.sym
== (*rhsptr
)->symtree
->n
.sym
))
10699 *rhsptr
= gfc_get_parentheses (*rhsptr
);
10707 /* Handle the case of a BOZ literal on the RHS. */
10708 if (rhs
->ts
.type
== BT_BOZ
)
10710 if (gfc_invalid_boz ("BOZ literal constant at %L is neither a DATA "
10711 "statement value nor an actual argument of "
10712 "INT/REAL/DBLE/CMPLX intrinsic subprogram",
10716 switch (lhs
->ts
.type
)
10719 if (!gfc_boz2int (rhs
, lhs
->ts
.kind
))
10723 if (!gfc_boz2real (rhs
, lhs
->ts
.kind
))
10727 gfc_error ("Invalid use of BOZ literal constant at %L", &rhs
->where
);
10732 if (lhs
->ts
.type
== BT_CHARACTER
&& warn_character_truncation
)
10734 HOST_WIDE_INT llen
= 0, rlen
= 0;
10735 if (lhs
->ts
.u
.cl
!= NULL
10736 && lhs
->ts
.u
.cl
->length
!= NULL
10737 && lhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10738 llen
= gfc_mpz_get_hwi (lhs
->ts
.u
.cl
->length
->value
.integer
);
10740 if (rhs
->expr_type
== EXPR_CONSTANT
)
10741 rlen
= rhs
->value
.character
.length
;
10743 else if (rhs
->ts
.u
.cl
!= NULL
10744 && rhs
->ts
.u
.cl
->length
!= NULL
10745 && rhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10746 rlen
= gfc_mpz_get_hwi (rhs
->ts
.u
.cl
->length
->value
.integer
);
10748 if (rlen
&& llen
&& rlen
> llen
)
10749 gfc_warning_now (OPT_Wcharacter_truncation
,
10750 "CHARACTER expression will be truncated "
10751 "in assignment (%ld/%ld) at %L",
10752 (long) llen
, (long) rlen
, &code
->loc
);
10755 /* Ensure that a vector index expression for the lvalue is evaluated
10756 to a temporary if the lvalue symbol is referenced in it. */
10759 for (ref
= lhs
->ref
; ref
; ref
= ref
->next
)
10760 if (ref
->type
== REF_ARRAY
)
10762 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
10763 if (ref
->u
.ar
.dimen_type
[n
] == DIMEN_VECTOR
10764 && gfc_find_sym_in_expr (lhs
->symtree
->n
.sym
,
10765 ref
->u
.ar
.start
[n
]))
10767 = gfc_get_parentheses (ref
->u
.ar
.start
[n
]);
10771 if (gfc_pure (NULL
))
10773 if (lhs
->ts
.type
== BT_DERIVED
10774 && lhs
->expr_type
== EXPR_VARIABLE
10775 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10776 && rhs
->expr_type
== EXPR_VARIABLE
10777 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10778 || gfc_is_coindexed (rhs
)))
10780 /* F2008, C1283. */
10781 if (gfc_is_coindexed (rhs
))
10782 gfc_error ("Coindexed expression at %L is assigned to "
10783 "a derived type variable with a POINTER "
10784 "component in a PURE procedure",
10787 gfc_error ("The impure variable at %L is assigned to "
10788 "a derived type variable with a POINTER "
10789 "component in a PURE procedure (12.6)",
10794 /* Fortran 2008, C1283. */
10795 if (gfc_is_coindexed (lhs
))
10797 gfc_error ("Assignment to coindexed variable at %L in a PURE "
10798 "procedure", &rhs
->where
);
10803 if (gfc_implicit_pure (NULL
))
10805 if (lhs
->expr_type
== EXPR_VARIABLE
10806 && lhs
->symtree
->n
.sym
!= gfc_current_ns
->proc_name
10807 && lhs
->symtree
->n
.sym
->ns
!= gfc_current_ns
)
10808 gfc_unset_implicit_pure (NULL
);
10810 if (lhs
->ts
.type
== BT_DERIVED
10811 && lhs
->expr_type
== EXPR_VARIABLE
10812 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10813 && rhs
->expr_type
== EXPR_VARIABLE
10814 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10815 || gfc_is_coindexed (rhs
)))
10816 gfc_unset_implicit_pure (NULL
);
10818 /* Fortran 2008, C1283. */
10819 if (gfc_is_coindexed (lhs
))
10820 gfc_unset_implicit_pure (NULL
);
10823 /* F2008, 7.2.1.2. */
10824 attr
= gfc_expr_attr (lhs
);
10825 if (lhs
->ts
.type
== BT_CLASS
&& attr
.allocatable
)
10827 if (attr
.codimension
)
10829 gfc_error ("Assignment to polymorphic coarray at %L is not "
10830 "permitted", &lhs
->where
);
10833 if (!gfc_notify_std (GFC_STD_F2008
, "Assignment to an allocatable "
10834 "polymorphic variable at %L", &lhs
->where
))
10836 if (!flag_realloc_lhs
)
10838 gfc_error ("Assignment to an allocatable polymorphic variable at %L "
10839 "requires %<-frealloc-lhs%>", &lhs
->where
);
10843 else if (lhs
->ts
.type
== BT_CLASS
)
10845 gfc_error ("Nonallocatable variable must not be polymorphic in intrinsic "
10846 "assignment at %L - check that there is a matching specific "
10847 "subroutine for '=' operator", &lhs
->where
);
10851 bool lhs_coindexed
= gfc_is_coindexed (lhs
);
10853 /* F2008, Section 7.2.1.2. */
10854 if (lhs_coindexed
&& gfc_has_ultimate_allocatable (lhs
))
10856 gfc_error ("Coindexed variable must not have an allocatable ultimate "
10857 "component in assignment at %L", &lhs
->where
);
10861 /* Assign the 'data' of a class object to a derived type. */
10862 if (lhs
->ts
.type
== BT_DERIVED
10863 && rhs
->ts
.type
== BT_CLASS
10864 && rhs
->expr_type
!= EXPR_ARRAY
)
10865 gfc_add_data_component (rhs
);
10867 /* Make sure there is a vtable and, in particular, a _copy for the
10869 if (UNLIMITED_POLY (lhs
) && lhs
->rank
&& rhs
->ts
.type
!= BT_CLASS
)
10870 gfc_find_vtab (&rhs
->ts
);
10872 bool caf_convert_to_send
= flag_coarray
== GFC_FCOARRAY_LIB
10874 || (code
->expr2
->expr_type
== EXPR_FUNCTION
10875 && code
->expr2
->value
.function
.isym
10876 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
10877 && (code
->expr1
->rank
== 0 || code
->expr2
->rank
!= 0)
10878 && !gfc_expr_attr (rhs
).allocatable
10879 && !gfc_has_vector_subscript (rhs
)));
10881 gfc_check_assign (lhs
, rhs
, 1, !caf_convert_to_send
);
10883 /* Insert a GFC_ISYM_CAF_SEND intrinsic, when the LHS is a coindexed variable.
10884 Additionally, insert this code when the RHS is a CAF as we then use the
10885 GFC_ISYM_CAF_SEND intrinsic just to avoid a temporary; but do not do so if
10886 the LHS is (re)allocatable or has a vector subscript. If the LHS is a
10887 noncoindexed array and the RHS is a coindexed scalar, use the normal code
10889 if (caf_convert_to_send
)
10891 if (code
->expr2
->expr_type
== EXPR_FUNCTION
10892 && code
->expr2
->value
.function
.isym
10893 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
10894 remove_caf_get_intrinsic (code
->expr2
);
10895 code
->op
= EXEC_CALL
;
10896 gfc_get_sym_tree (GFC_PREFIX ("caf_send"), ns
, &code
->symtree
, true);
10897 code
->resolved_sym
= code
->symtree
->n
.sym
;
10898 code
->resolved_sym
->attr
.flavor
= FL_PROCEDURE
;
10899 code
->resolved_sym
->attr
.intrinsic
= 1;
10900 code
->resolved_sym
->attr
.subroutine
= 1;
10901 code
->resolved_isym
= gfc_intrinsic_subroutine_by_id (GFC_ISYM_CAF_SEND
);
10902 gfc_commit_symbol (code
->resolved_sym
);
10903 code
->ext
.actual
= gfc_get_actual_arglist ();
10904 code
->ext
.actual
->expr
= lhs
;
10905 code
->ext
.actual
->next
= gfc_get_actual_arglist ();
10906 code
->ext
.actual
->next
->expr
= rhs
;
10907 code
->expr1
= NULL
;
10908 code
->expr2
= NULL
;
10915 /* Add a component reference onto an expression. */
10918 add_comp_ref (gfc_expr
*e
, gfc_component
*c
)
10923 ref
= &((*ref
)->next
);
10924 *ref
= gfc_get_ref ();
10925 (*ref
)->type
= REF_COMPONENT
;
10926 (*ref
)->u
.c
.sym
= e
->ts
.u
.derived
;
10927 (*ref
)->u
.c
.component
= c
;
10930 /* Add a full array ref, as necessary. */
10933 gfc_add_full_array_ref (e
, c
->as
);
10934 e
->rank
= c
->as
->rank
;
10939 /* Build an assignment. Keep the argument 'op' for future use, so that
10940 pointer assignments can be made. */
10943 build_assignment (gfc_exec_op op
, gfc_expr
*expr1
, gfc_expr
*expr2
,
10944 gfc_component
*comp1
, gfc_component
*comp2
, locus loc
)
10946 gfc_code
*this_code
;
10948 this_code
= gfc_get_code (op
);
10949 this_code
->next
= NULL
;
10950 this_code
->expr1
= gfc_copy_expr (expr1
);
10951 this_code
->expr2
= gfc_copy_expr (expr2
);
10952 this_code
->loc
= loc
;
10953 if (comp1
&& comp2
)
10955 add_comp_ref (this_code
->expr1
, comp1
);
10956 add_comp_ref (this_code
->expr2
, comp2
);
10963 /* Makes a temporary variable expression based on the characteristics of
10964 a given variable expression. */
10967 get_temp_from_expr (gfc_expr
*e
, gfc_namespace
*ns
)
10969 static int serial
= 0;
10970 char name
[GFC_MAX_SYMBOL_LEN
];
10972 gfc_array_spec
*as
;
10973 gfc_array_ref
*aref
;
10976 sprintf (name
, GFC_PREFIX("DA%d"), serial
++);
10977 gfc_get_sym_tree (name
, ns
, &tmp
, false);
10978 gfc_add_type (tmp
->n
.sym
, &e
->ts
, NULL
);
10980 if (e
->expr_type
== EXPR_CONSTANT
&& e
->ts
.type
== BT_CHARACTER
)
10981 tmp
->n
.sym
->ts
.u
.cl
->length
= gfc_get_int_expr (gfc_charlen_int_kind
,
10983 e
->value
.character
.length
);
10989 /* Obtain the arrayspec for the temporary. */
10990 if (e
->rank
&& e
->expr_type
!= EXPR_ARRAY
10991 && e
->expr_type
!= EXPR_FUNCTION
10992 && e
->expr_type
!= EXPR_OP
)
10994 aref
= gfc_find_array_ref (e
);
10995 if (e
->expr_type
== EXPR_VARIABLE
10996 && e
->symtree
->n
.sym
->as
== aref
->as
)
11000 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
11001 if (ref
->type
== REF_COMPONENT
11002 && ref
->u
.c
.component
->as
== aref
->as
)
11010 /* Add the attributes and the arrayspec to the temporary. */
11011 tmp
->n
.sym
->attr
= gfc_expr_attr (e
);
11012 tmp
->n
.sym
->attr
.function
= 0;
11013 tmp
->n
.sym
->attr
.result
= 0;
11014 tmp
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
11015 tmp
->n
.sym
->attr
.dummy
= 0;
11016 tmp
->n
.sym
->attr
.intent
= INTENT_UNKNOWN
;
11020 tmp
->n
.sym
->as
= gfc_copy_array_spec (as
);
11023 if (as
->type
== AS_DEFERRED
)
11024 tmp
->n
.sym
->attr
.allocatable
= 1;
11026 else if (e
->rank
&& (e
->expr_type
== EXPR_ARRAY
11027 || e
->expr_type
== EXPR_FUNCTION
11028 || e
->expr_type
== EXPR_OP
))
11030 tmp
->n
.sym
->as
= gfc_get_array_spec ();
11031 tmp
->n
.sym
->as
->type
= AS_DEFERRED
;
11032 tmp
->n
.sym
->as
->rank
= e
->rank
;
11033 tmp
->n
.sym
->attr
.allocatable
= 1;
11034 tmp
->n
.sym
->attr
.dimension
= 1;
11037 tmp
->n
.sym
->attr
.dimension
= 0;
11039 gfc_set_sym_referenced (tmp
->n
.sym
);
11040 gfc_commit_symbol (tmp
->n
.sym
);
11041 e
= gfc_lval_expr_from_sym (tmp
->n
.sym
);
11043 /* Should the lhs be a section, use its array ref for the
11044 temporary expression. */
11045 if (aref
&& aref
->type
!= AR_FULL
)
11047 gfc_free_ref_list (e
->ref
);
11048 e
->ref
= gfc_copy_ref (ref
);
11054 /* Add one line of code to the code chain, making sure that 'head' and
11055 'tail' are appropriately updated. */
11058 add_code_to_chain (gfc_code
**this_code
, gfc_code
**head
, gfc_code
**tail
)
11060 gcc_assert (this_code
);
11062 *head
= *tail
= *this_code
;
11064 *tail
= gfc_append_code (*tail
, *this_code
);
11069 /* Counts the potential number of part array references that would
11070 result from resolution of typebound defined assignments. */
11073 nonscalar_typebound_assign (gfc_symbol
*derived
, int depth
)
11076 int c_depth
= 0, t_depth
;
11078 for (c
= derived
->components
; c
; c
= c
->next
)
11080 if ((!gfc_bt_struct (c
->ts
.type
)
11082 || c
->attr
.allocatable
11083 || c
->attr
.proc_pointer_comp
11084 || c
->attr
.class_pointer
11085 || c
->attr
.proc_pointer
)
11086 && !c
->attr
.defined_assign_comp
)
11089 if (c
->as
&& c_depth
== 0)
11092 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
11093 t_depth
= nonscalar_typebound_assign (c
->ts
.u
.derived
,
11098 c_depth
= t_depth
> c_depth
? t_depth
: c_depth
;
11100 return depth
+ c_depth
;
11104 /* Implement 7.2.1.3 of the F08 standard:
11105 "An intrinsic assignment where the variable is of derived type is
11106 performed as if each component of the variable were assigned from the
11107 corresponding component of expr using pointer assignment (7.2.2) for
11108 each pointer component, defined assignment for each nonpointer
11109 nonallocatable component of a type that has a type-bound defined
11110 assignment consistent with the component, intrinsic assignment for
11111 each other nonpointer nonallocatable component, ..."
11113 The pointer assignments are taken care of by the intrinsic
11114 assignment of the structure itself. This function recursively adds
11115 defined assignments where required. The recursion is accomplished
11116 by calling gfc_resolve_code.
11118 When the lhs in a defined assignment has intent INOUT, we need a
11119 temporary for the lhs. In pseudo-code:
11121 ! Only call function lhs once.
11122 if (lhs is not a constant or an variable)
11125 ! Do the intrinsic assignment
11127 ! Now do the defined assignments
11128 do over components with typebound defined assignment [%cmp]
11129 #if one component's assignment procedure is INOUT
11131 #if expr2 non-variable
11137 t1%cmp {defined=} expr2%cmp
11143 expr1%cmp {defined=} expr2%cmp
11147 /* The temporary assignments have to be put on top of the additional
11148 code to avoid the result being changed by the intrinsic assignment.
11150 static int component_assignment_level
= 0;
11151 static gfc_code
*tmp_head
= NULL
, *tmp_tail
= NULL
;
11154 generate_component_assignments (gfc_code
**code
, gfc_namespace
*ns
)
11156 gfc_component
*comp1
, *comp2
;
11157 gfc_code
*this_code
= NULL
, *head
= NULL
, *tail
= NULL
;
11159 int error_count
, depth
;
11161 gfc_get_errors (NULL
, &error_count
);
11163 /* Filter out continuing processing after an error. */
11165 || (*code
)->expr1
->ts
.type
!= BT_DERIVED
11166 || (*code
)->expr2
->ts
.type
!= BT_DERIVED
)
11169 /* TODO: Handle more than one part array reference in assignments. */
11170 depth
= nonscalar_typebound_assign ((*code
)->expr1
->ts
.u
.derived
,
11171 (*code
)->expr1
->rank
? 1 : 0);
11174 gfc_warning (0, "TODO: type-bound defined assignment(s) at %L not "
11175 "done because multiple part array references would "
11176 "occur in intermediate expressions.", &(*code
)->loc
);
11180 component_assignment_level
++;
11182 /* Create a temporary so that functions get called only once. */
11183 if ((*code
)->expr2
->expr_type
!= EXPR_VARIABLE
11184 && (*code
)->expr2
->expr_type
!= EXPR_CONSTANT
)
11186 gfc_expr
*tmp_expr
;
11188 /* Assign the rhs to the temporary. */
11189 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11190 this_code
= build_assignment (EXEC_ASSIGN
,
11191 tmp_expr
, (*code
)->expr2
,
11192 NULL
, NULL
, (*code
)->loc
);
11193 /* Add the code and substitute the rhs expression. */
11194 add_code_to_chain (&this_code
, &tmp_head
, &tmp_tail
);
11195 gfc_free_expr ((*code
)->expr2
);
11196 (*code
)->expr2
= tmp_expr
;
11199 /* Do the intrinsic assignment. This is not needed if the lhs is one
11200 of the temporaries generated here, since the intrinsic assignment
11201 to the final result already does this. */
11202 if ((*code
)->expr1
->symtree
->n
.sym
->name
[2] != '@')
11204 this_code
= build_assignment (EXEC_ASSIGN
,
11205 (*code
)->expr1
, (*code
)->expr2
,
11206 NULL
, NULL
, (*code
)->loc
);
11207 add_code_to_chain (&this_code
, &head
, &tail
);
11210 comp1
= (*code
)->expr1
->ts
.u
.derived
->components
;
11211 comp2
= (*code
)->expr2
->ts
.u
.derived
->components
;
11214 for (; comp1
; comp1
= comp1
->next
, comp2
= comp2
->next
)
11216 bool inout
= false;
11218 /* The intrinsic assignment does the right thing for pointers
11219 of all kinds and allocatable components. */
11220 if (!gfc_bt_struct (comp1
->ts
.type
)
11221 || comp1
->attr
.pointer
11222 || comp1
->attr
.allocatable
11223 || comp1
->attr
.proc_pointer_comp
11224 || comp1
->attr
.class_pointer
11225 || comp1
->attr
.proc_pointer
)
11228 /* Make an assigment for this component. */
11229 this_code
= build_assignment (EXEC_ASSIGN
,
11230 (*code
)->expr1
, (*code
)->expr2
,
11231 comp1
, comp2
, (*code
)->loc
);
11233 /* Convert the assignment if there is a defined assignment for
11234 this type. Otherwise, using the call from gfc_resolve_code,
11235 recurse into its components. */
11236 gfc_resolve_code (this_code
, ns
);
11238 if (this_code
->op
== EXEC_ASSIGN_CALL
)
11240 gfc_formal_arglist
*dummy_args
;
11242 /* Check that there is a typebound defined assignment. If not,
11243 then this must be a module defined assignment. We cannot
11244 use the defined_assign_comp attribute here because it must
11245 be this derived type that has the defined assignment and not
11247 if (!(comp1
->ts
.u
.derived
->f2k_derived
11248 && comp1
->ts
.u
.derived
->f2k_derived
11249 ->tb_op
[INTRINSIC_ASSIGN
]))
11251 gfc_free_statements (this_code
);
11256 /* If the first argument of the subroutine has intent INOUT
11257 a temporary must be generated and used instead. */
11258 rsym
= this_code
->resolved_sym
;
11259 dummy_args
= gfc_sym_get_dummy_args (rsym
);
11261 && dummy_args
->sym
->attr
.intent
== INTENT_INOUT
)
11263 gfc_code
*temp_code
;
11266 /* Build the temporary required for the assignment and put
11267 it at the head of the generated code. */
11270 t1
= get_temp_from_expr ((*code
)->expr1
, ns
);
11271 temp_code
= build_assignment (EXEC_ASSIGN
,
11272 t1
, (*code
)->expr1
,
11273 NULL
, NULL
, (*code
)->loc
);
11275 /* For allocatable LHS, check whether it is allocated. Note
11276 that allocatable components with defined assignment are
11277 not yet support. See PR 57696. */
11278 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
)
11282 gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11283 block
= gfc_get_code (EXEC_IF
);
11284 block
->block
= gfc_get_code (EXEC_IF
);
11285 block
->block
->expr1
11286 = gfc_build_intrinsic_call (ns
,
11287 GFC_ISYM_ALLOCATED
, "allocated",
11288 (*code
)->loc
, 1, e
);
11289 block
->block
->next
= temp_code
;
11292 add_code_to_chain (&temp_code
, &tmp_head
, &tmp_tail
);
11295 /* Replace the first actual arg with the component of the
11297 gfc_free_expr (this_code
->ext
.actual
->expr
);
11298 this_code
->ext
.actual
->expr
= gfc_copy_expr (t1
);
11299 add_comp_ref (this_code
->ext
.actual
->expr
, comp1
);
11301 /* If the LHS variable is allocatable and wasn't allocated and
11302 the temporary is allocatable, pointer assign the address of
11303 the freshly allocated LHS to the temporary. */
11304 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
11305 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11310 cond
= gfc_get_expr ();
11311 cond
->ts
.type
= BT_LOGICAL
;
11312 cond
->ts
.kind
= gfc_default_logical_kind
;
11313 cond
->expr_type
= EXPR_OP
;
11314 cond
->where
= (*code
)->loc
;
11315 cond
->value
.op
.op
= INTRINSIC_NOT
;
11316 cond
->value
.op
.op1
= gfc_build_intrinsic_call (ns
,
11317 GFC_ISYM_ALLOCATED
, "allocated",
11318 (*code
)->loc
, 1, gfc_copy_expr (t1
));
11319 block
= gfc_get_code (EXEC_IF
);
11320 block
->block
= gfc_get_code (EXEC_IF
);
11321 block
->block
->expr1
= cond
;
11322 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11323 t1
, (*code
)->expr1
,
11324 NULL
, NULL
, (*code
)->loc
);
11325 add_code_to_chain (&block
, &head
, &tail
);
11329 else if (this_code
->op
== EXEC_ASSIGN
&& !this_code
->next
)
11331 /* Don't add intrinsic assignments since they are already
11332 effected by the intrinsic assignment of the structure. */
11333 gfc_free_statements (this_code
);
11338 add_code_to_chain (&this_code
, &head
, &tail
);
11342 /* Transfer the value to the final result. */
11343 this_code
= build_assignment (EXEC_ASSIGN
,
11344 (*code
)->expr1
, t1
,
11345 comp1
, comp2
, (*code
)->loc
);
11346 add_code_to_chain (&this_code
, &head
, &tail
);
11350 /* Put the temporary assignments at the top of the generated code. */
11351 if (tmp_head
&& component_assignment_level
== 1)
11353 gfc_append_code (tmp_head
, head
);
11355 tmp_head
= tmp_tail
= NULL
;
11358 // If we did a pointer assignment - thus, we need to ensure that the LHS is
11359 // not accidentally deallocated. Hence, nullify t1.
11360 if (t1
&& (*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
11361 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11367 e
= gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11368 cond
= gfc_build_intrinsic_call (ns
, GFC_ISYM_ASSOCIATED
, "associated",
11369 (*code
)->loc
, 2, gfc_copy_expr (t1
), e
);
11370 block
= gfc_get_code (EXEC_IF
);
11371 block
->block
= gfc_get_code (EXEC_IF
);
11372 block
->block
->expr1
= cond
;
11373 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11374 t1
, gfc_get_null_expr (&(*code
)->loc
),
11375 NULL
, NULL
, (*code
)->loc
);
11376 gfc_append_code (tail
, block
);
11380 /* Now attach the remaining code chain to the input code. Step on
11381 to the end of the new code since resolution is complete. */
11382 gcc_assert ((*code
)->op
== EXEC_ASSIGN
);
11383 tail
->next
= (*code
)->next
;
11384 /* Overwrite 'code' because this would place the intrinsic assignment
11385 before the temporary for the lhs is created. */
11386 gfc_free_expr ((*code
)->expr1
);
11387 gfc_free_expr ((*code
)->expr2
);
11393 component_assignment_level
--;
11397 /* F2008: Pointer function assignments are of the form:
11398 ptr_fcn (args) = expr
11399 This function breaks these assignments into two statements:
11400 temporary_pointer => ptr_fcn(args)
11401 temporary_pointer = expr */
11404 resolve_ptr_fcn_assign (gfc_code
**code
, gfc_namespace
*ns
)
11406 gfc_expr
*tmp_ptr_expr
;
11407 gfc_code
*this_code
;
11408 gfc_component
*comp
;
11411 if ((*code
)->expr1
->expr_type
!= EXPR_FUNCTION
)
11414 /* Even if standard does not support this feature, continue to build
11415 the two statements to avoid upsetting frontend_passes.c. */
11416 gfc_notify_std (GFC_STD_F2008
, "Pointer procedure assignment at "
11417 "%L", &(*code
)->loc
);
11419 comp
= gfc_get_proc_ptr_comp ((*code
)->expr1
);
11422 s
= comp
->ts
.interface
;
11424 s
= (*code
)->expr1
->symtree
->n
.sym
;
11426 if (s
== NULL
|| !s
->result
->attr
.pointer
)
11428 gfc_error ("The function result on the lhs of the assignment at "
11429 "%L must have the pointer attribute.",
11430 &(*code
)->expr1
->where
);
11431 (*code
)->op
= EXEC_NOP
;
11435 tmp_ptr_expr
= get_temp_from_expr ((*code
)->expr2
, ns
);
11437 /* get_temp_from_expression is set up for ordinary assignments. To that
11438 end, where array bounds are not known, arrays are made allocatable.
11439 Change the temporary to a pointer here. */
11440 tmp_ptr_expr
->symtree
->n
.sym
->attr
.pointer
= 1;
11441 tmp_ptr_expr
->symtree
->n
.sym
->attr
.allocatable
= 0;
11442 tmp_ptr_expr
->where
= (*code
)->loc
;
11444 this_code
= build_assignment (EXEC_ASSIGN
,
11445 tmp_ptr_expr
, (*code
)->expr2
,
11446 NULL
, NULL
, (*code
)->loc
);
11447 this_code
->next
= (*code
)->next
;
11448 (*code
)->next
= this_code
;
11449 (*code
)->op
= EXEC_POINTER_ASSIGN
;
11450 (*code
)->expr2
= (*code
)->expr1
;
11451 (*code
)->expr1
= tmp_ptr_expr
;
11457 /* Deferred character length assignments from an operator expression
11458 require a temporary because the character length of the lhs can
11459 change in the course of the assignment. */
11462 deferred_op_assign (gfc_code
**code
, gfc_namespace
*ns
)
11464 gfc_expr
*tmp_expr
;
11465 gfc_code
*this_code
;
11467 if (!((*code
)->expr1
->ts
.type
== BT_CHARACTER
11468 && (*code
)->expr1
->ts
.deferred
&& (*code
)->expr1
->rank
11469 && (*code
)->expr2
->expr_type
== EXPR_OP
))
11472 if (!gfc_check_dependency ((*code
)->expr1
, (*code
)->expr2
, 1))
11475 if (gfc_expr_attr ((*code
)->expr1
).pointer
)
11478 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11479 tmp_expr
->where
= (*code
)->loc
;
11481 /* A new charlen is required to ensure that the variable string
11482 length is different to that of the original lhs. */
11483 tmp_expr
->ts
.u
.cl
= gfc_get_charlen();
11484 tmp_expr
->symtree
->n
.sym
->ts
.u
.cl
= tmp_expr
->ts
.u
.cl
;
11485 tmp_expr
->ts
.u
.cl
->next
= (*code
)->expr2
->ts
.u
.cl
->next
;
11486 (*code
)->expr2
->ts
.u
.cl
->next
= tmp_expr
->ts
.u
.cl
;
11488 tmp_expr
->symtree
->n
.sym
->ts
.deferred
= 1;
11490 this_code
= build_assignment (EXEC_ASSIGN
,
11492 gfc_copy_expr (tmp_expr
),
11493 NULL
, NULL
, (*code
)->loc
);
11495 (*code
)->expr1
= tmp_expr
;
11497 this_code
->next
= (*code
)->next
;
11498 (*code
)->next
= this_code
;
11504 /* Given a block of code, recursively resolve everything pointed to by this
11508 gfc_resolve_code (gfc_code
*code
, gfc_namespace
*ns
)
11510 int omp_workshare_save
;
11511 int forall_save
, do_concurrent_save
;
11515 frame
.prev
= cs_base
;
11519 find_reachable_labels (code
);
11521 for (; code
; code
= code
->next
)
11523 frame
.current
= code
;
11524 forall_save
= forall_flag
;
11525 do_concurrent_save
= gfc_do_concurrent_flag
;
11527 if (code
->op
== EXEC_FORALL
)
11530 gfc_resolve_forall (code
, ns
, forall_save
);
11533 else if (code
->block
)
11535 omp_workshare_save
= -1;
11538 case EXEC_OACC_PARALLEL_LOOP
:
11539 case EXEC_OACC_PARALLEL
:
11540 case EXEC_OACC_KERNELS_LOOP
:
11541 case EXEC_OACC_KERNELS
:
11542 case EXEC_OACC_DATA
:
11543 case EXEC_OACC_HOST_DATA
:
11544 case EXEC_OACC_LOOP
:
11545 gfc_resolve_oacc_blocks (code
, ns
);
11547 case EXEC_OMP_PARALLEL_WORKSHARE
:
11548 omp_workshare_save
= omp_workshare_flag
;
11549 omp_workshare_flag
= 1;
11550 gfc_resolve_omp_parallel_blocks (code
, ns
);
11552 case EXEC_OMP_PARALLEL
:
11553 case EXEC_OMP_PARALLEL_DO
:
11554 case EXEC_OMP_PARALLEL_DO_SIMD
:
11555 case EXEC_OMP_PARALLEL_SECTIONS
:
11556 case EXEC_OMP_TARGET_PARALLEL
:
11557 case EXEC_OMP_TARGET_PARALLEL_DO
:
11558 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11559 case EXEC_OMP_TARGET_TEAMS
:
11560 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11561 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11562 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11563 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11564 case EXEC_OMP_TASK
:
11565 case EXEC_OMP_TASKLOOP
:
11566 case EXEC_OMP_TASKLOOP_SIMD
:
11567 case EXEC_OMP_TEAMS
:
11568 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11569 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11570 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11571 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11572 omp_workshare_save
= omp_workshare_flag
;
11573 omp_workshare_flag
= 0;
11574 gfc_resolve_omp_parallel_blocks (code
, ns
);
11576 case EXEC_OMP_DISTRIBUTE
:
11577 case EXEC_OMP_DISTRIBUTE_SIMD
:
11579 case EXEC_OMP_DO_SIMD
:
11580 case EXEC_OMP_SIMD
:
11581 case EXEC_OMP_TARGET_SIMD
:
11582 gfc_resolve_omp_do_blocks (code
, ns
);
11584 case EXEC_SELECT_TYPE
:
11585 /* Blocks are handled in resolve_select_type because we have
11586 to transform the SELECT TYPE into ASSOCIATE first. */
11588 case EXEC_DO_CONCURRENT
:
11589 gfc_do_concurrent_flag
= 1;
11590 gfc_resolve_blocks (code
->block
, ns
);
11591 gfc_do_concurrent_flag
= 2;
11593 case EXEC_OMP_WORKSHARE
:
11594 omp_workshare_save
= omp_workshare_flag
;
11595 omp_workshare_flag
= 1;
11598 gfc_resolve_blocks (code
->block
, ns
);
11602 if (omp_workshare_save
!= -1)
11603 omp_workshare_flag
= omp_workshare_save
;
11607 if (code
->op
!= EXEC_COMPCALL
&& code
->op
!= EXEC_CALL_PPC
)
11608 t
= gfc_resolve_expr (code
->expr1
);
11609 forall_flag
= forall_save
;
11610 gfc_do_concurrent_flag
= do_concurrent_save
;
11612 if (!gfc_resolve_expr (code
->expr2
))
11615 if (code
->op
== EXEC_ALLOCATE
11616 && !gfc_resolve_expr (code
->expr3
))
11622 case EXEC_END_BLOCK
:
11623 case EXEC_END_NESTED_BLOCK
:
11627 case EXEC_ERROR_STOP
:
11629 case EXEC_CONTINUE
:
11631 case EXEC_ASSIGN_CALL
:
11634 case EXEC_CRITICAL
:
11635 resolve_critical (code
);
11638 case EXEC_SYNC_ALL
:
11639 case EXEC_SYNC_IMAGES
:
11640 case EXEC_SYNC_MEMORY
:
11641 resolve_sync (code
);
11646 case EXEC_EVENT_POST
:
11647 case EXEC_EVENT_WAIT
:
11648 resolve_lock_unlock_event (code
);
11651 case EXEC_FAIL_IMAGE
:
11652 case EXEC_FORM_TEAM
:
11653 case EXEC_CHANGE_TEAM
:
11654 case EXEC_END_TEAM
:
11655 case EXEC_SYNC_TEAM
:
11659 /* Keep track of which entry we are up to. */
11660 current_entry_id
= code
->ext
.entry
->id
;
11664 resolve_where (code
, NULL
);
11668 if (code
->expr1
!= NULL
)
11670 if (code
->expr1
->ts
.type
!= BT_INTEGER
)
11671 gfc_error ("ASSIGNED GOTO statement at %L requires an "
11672 "INTEGER variable", &code
->expr1
->where
);
11673 else if (code
->expr1
->symtree
->n
.sym
->attr
.assign
!= 1)
11674 gfc_error ("Variable %qs has not been assigned a target "
11675 "label at %L", code
->expr1
->symtree
->n
.sym
->name
,
11676 &code
->expr1
->where
);
11679 resolve_branch (code
->label1
, code
);
11683 if (code
->expr1
!= NULL
11684 && (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
))
11685 gfc_error ("Alternate RETURN statement at %L requires a SCALAR-"
11686 "INTEGER return specifier", &code
->expr1
->where
);
11689 case EXEC_INIT_ASSIGN
:
11690 case EXEC_END_PROCEDURE
:
11697 /* Remove a GFC_ISYM_CAF_GET inserted for a coindexed variable on
11699 if (code
->expr1
->expr_type
== EXPR_FUNCTION
11700 && code
->expr1
->value
.function
.isym
11701 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
11702 remove_caf_get_intrinsic (code
->expr1
);
11704 /* If this is a pointer function in an lvalue variable context,
11705 the new code will have to be resolved afresh. This is also the
11706 case with an error, where the code is transformed into NOP to
11707 prevent ICEs downstream. */
11708 if (resolve_ptr_fcn_assign (&code
, ns
)
11709 || code
->op
== EXEC_NOP
)
11712 if (!gfc_check_vardef_context (code
->expr1
, false, false, false,
11716 if (resolve_ordinary_assign (code
, ns
))
11718 if (code
->op
== EXEC_COMPCALL
)
11724 /* Check for dependencies in deferred character length array
11725 assignments and generate a temporary, if necessary. */
11726 if (code
->op
== EXEC_ASSIGN
&& deferred_op_assign (&code
, ns
))
11729 /* F03 7.4.1.3 for non-allocatable, non-pointer components. */
11730 if (code
->op
!= EXEC_CALL
&& code
->expr1
->ts
.type
== BT_DERIVED
11731 && code
->expr1
->ts
.u
.derived
11732 && code
->expr1
->ts
.u
.derived
->attr
.defined_assign_comp
)
11733 generate_component_assignments (&code
, ns
);
11737 case EXEC_LABEL_ASSIGN
:
11738 if (code
->label1
->defined
== ST_LABEL_UNKNOWN
)
11739 gfc_error ("Label %d referenced at %L is never defined",
11740 code
->label1
->value
, &code
->label1
->where
);
11742 && (code
->expr1
->expr_type
!= EXPR_VARIABLE
11743 || code
->expr1
->symtree
->n
.sym
->ts
.type
!= BT_INTEGER
11744 || code
->expr1
->symtree
->n
.sym
->ts
.kind
11745 != gfc_default_integer_kind
11746 || code
->expr1
->symtree
->n
.sym
->as
!= NULL
))
11747 gfc_error ("ASSIGN statement at %L requires a scalar "
11748 "default INTEGER variable", &code
->expr1
->where
);
11751 case EXEC_POINTER_ASSIGN
:
11758 /* This is both a variable definition and pointer assignment
11759 context, so check both of them. For rank remapping, a final
11760 array ref may be present on the LHS and fool gfc_expr_attr
11761 used in gfc_check_vardef_context. Remove it. */
11762 e
= remove_last_array_ref (code
->expr1
);
11763 t
= gfc_check_vardef_context (e
, true, false, false,
11764 _("pointer assignment"));
11766 t
= gfc_check_vardef_context (e
, false, false, false,
11767 _("pointer assignment"));
11770 t
= gfc_check_pointer_assign (code
->expr1
, code
->expr2
, !t
) && t
;
11775 /* Assigning a class object always is a regular assign. */
11776 if (code
->expr2
->ts
.type
== BT_CLASS
11777 && code
->expr1
->ts
.type
== BT_CLASS
11778 && !CLASS_DATA (code
->expr2
)->attr
.dimension
11779 && !(gfc_expr_attr (code
->expr1
).proc_pointer
11780 && code
->expr2
->expr_type
== EXPR_VARIABLE
11781 && code
->expr2
->symtree
->n
.sym
->attr
.flavor
11783 code
->op
= EXEC_ASSIGN
;
11787 case EXEC_ARITHMETIC_IF
:
11789 gfc_expr
*e
= code
->expr1
;
11791 gfc_resolve_expr (e
);
11792 if (e
->expr_type
== EXPR_NULL
)
11793 gfc_error ("Invalid NULL at %L", &e
->where
);
11795 if (t
&& (e
->rank
> 0
11796 || !(e
->ts
.type
== BT_REAL
|| e
->ts
.type
== BT_INTEGER
)))
11797 gfc_error ("Arithmetic IF statement at %L requires a scalar "
11798 "REAL or INTEGER expression", &e
->where
);
11800 resolve_branch (code
->label1
, code
);
11801 resolve_branch (code
->label2
, code
);
11802 resolve_branch (code
->label3
, code
);
11807 if (t
&& code
->expr1
!= NULL
11808 && (code
->expr1
->ts
.type
!= BT_LOGICAL
11809 || code
->expr1
->rank
!= 0))
11810 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
11811 &code
->expr1
->where
);
11816 resolve_call (code
);
11819 case EXEC_COMPCALL
:
11821 resolve_typebound_subroutine (code
);
11824 case EXEC_CALL_PPC
:
11825 resolve_ppc_call (code
);
11829 /* Select is complicated. Also, a SELECT construct could be
11830 a transformed computed GOTO. */
11831 resolve_select (code
, false);
11834 case EXEC_SELECT_TYPE
:
11835 resolve_select_type (code
, ns
);
11838 case EXEC_SELECT_RANK
:
11839 resolve_select_rank (code
, ns
);
11843 resolve_block_construct (code
);
11847 if (code
->ext
.iterator
!= NULL
)
11849 gfc_iterator
*iter
= code
->ext
.iterator
;
11850 if (gfc_resolve_iterator (iter
, true, false))
11851 gfc_resolve_do_iterator (code
, iter
->var
->symtree
->n
.sym
,
11856 case EXEC_DO_WHILE
:
11857 if (code
->expr1
== NULL
)
11858 gfc_internal_error ("gfc_resolve_code(): No expression on "
11861 && (code
->expr1
->rank
!= 0
11862 || code
->expr1
->ts
.type
!= BT_LOGICAL
))
11863 gfc_error ("Exit condition of DO WHILE loop at %L must be "
11864 "a scalar LOGICAL expression", &code
->expr1
->where
);
11867 case EXEC_ALLOCATE
:
11869 resolve_allocate_deallocate (code
, "ALLOCATE");
11873 case EXEC_DEALLOCATE
:
11875 resolve_allocate_deallocate (code
, "DEALLOCATE");
11880 if (!gfc_resolve_open (code
->ext
.open
))
11883 resolve_branch (code
->ext
.open
->err
, code
);
11887 if (!gfc_resolve_close (code
->ext
.close
))
11890 resolve_branch (code
->ext
.close
->err
, code
);
11893 case EXEC_BACKSPACE
:
11897 if (!gfc_resolve_filepos (code
->ext
.filepos
, &code
->loc
))
11900 resolve_branch (code
->ext
.filepos
->err
, code
);
11904 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11907 resolve_branch (code
->ext
.inquire
->err
, code
);
11910 case EXEC_IOLENGTH
:
11911 gcc_assert (code
->ext
.inquire
!= NULL
);
11912 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11915 resolve_branch (code
->ext
.inquire
->err
, code
);
11919 if (!gfc_resolve_wait (code
->ext
.wait
))
11922 resolve_branch (code
->ext
.wait
->err
, code
);
11923 resolve_branch (code
->ext
.wait
->end
, code
);
11924 resolve_branch (code
->ext
.wait
->eor
, code
);
11929 if (!gfc_resolve_dt (code
->ext
.dt
, &code
->loc
))
11932 resolve_branch (code
->ext
.dt
->err
, code
);
11933 resolve_branch (code
->ext
.dt
->end
, code
);
11934 resolve_branch (code
->ext
.dt
->eor
, code
);
11937 case EXEC_TRANSFER
:
11938 resolve_transfer (code
);
11941 case EXEC_DO_CONCURRENT
:
11943 resolve_forall_iterators (code
->ext
.forall_iterator
);
11945 if (code
->expr1
!= NULL
11946 && (code
->expr1
->ts
.type
!= BT_LOGICAL
|| code
->expr1
->rank
))
11947 gfc_error ("FORALL mask clause at %L requires a scalar LOGICAL "
11948 "expression", &code
->expr1
->where
);
11951 case EXEC_OACC_PARALLEL_LOOP
:
11952 case EXEC_OACC_PARALLEL
:
11953 case EXEC_OACC_KERNELS_LOOP
:
11954 case EXEC_OACC_KERNELS
:
11955 case EXEC_OACC_DATA
:
11956 case EXEC_OACC_HOST_DATA
:
11957 case EXEC_OACC_LOOP
:
11958 case EXEC_OACC_UPDATE
:
11959 case EXEC_OACC_WAIT
:
11960 case EXEC_OACC_CACHE
:
11961 case EXEC_OACC_ENTER_DATA
:
11962 case EXEC_OACC_EXIT_DATA
:
11963 case EXEC_OACC_ATOMIC
:
11964 case EXEC_OACC_DECLARE
:
11965 gfc_resolve_oacc_directive (code
, ns
);
11968 case EXEC_OMP_ATOMIC
:
11969 case EXEC_OMP_BARRIER
:
11970 case EXEC_OMP_CANCEL
:
11971 case EXEC_OMP_CANCELLATION_POINT
:
11972 case EXEC_OMP_CRITICAL
:
11973 case EXEC_OMP_FLUSH
:
11974 case EXEC_OMP_DISTRIBUTE
:
11975 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
11976 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
11977 case EXEC_OMP_DISTRIBUTE_SIMD
:
11979 case EXEC_OMP_DO_SIMD
:
11980 case EXEC_OMP_MASTER
:
11981 case EXEC_OMP_ORDERED
:
11982 case EXEC_OMP_SECTIONS
:
11983 case EXEC_OMP_SIMD
:
11984 case EXEC_OMP_SINGLE
:
11985 case EXEC_OMP_TARGET
:
11986 case EXEC_OMP_TARGET_DATA
:
11987 case EXEC_OMP_TARGET_ENTER_DATA
:
11988 case EXEC_OMP_TARGET_EXIT_DATA
:
11989 case EXEC_OMP_TARGET_PARALLEL
:
11990 case EXEC_OMP_TARGET_PARALLEL_DO
:
11991 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11992 case EXEC_OMP_TARGET_SIMD
:
11993 case EXEC_OMP_TARGET_TEAMS
:
11994 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11995 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11996 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11997 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11998 case EXEC_OMP_TARGET_UPDATE
:
11999 case EXEC_OMP_TASK
:
12000 case EXEC_OMP_TASKGROUP
:
12001 case EXEC_OMP_TASKLOOP
:
12002 case EXEC_OMP_TASKLOOP_SIMD
:
12003 case EXEC_OMP_TASKWAIT
:
12004 case EXEC_OMP_TASKYIELD
:
12005 case EXEC_OMP_TEAMS
:
12006 case EXEC_OMP_TEAMS_DISTRIBUTE
:
12007 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
12008 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
12009 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
12010 case EXEC_OMP_WORKSHARE
:
12011 gfc_resolve_omp_directive (code
, ns
);
12014 case EXEC_OMP_PARALLEL
:
12015 case EXEC_OMP_PARALLEL_DO
:
12016 case EXEC_OMP_PARALLEL_DO_SIMD
:
12017 case EXEC_OMP_PARALLEL_SECTIONS
:
12018 case EXEC_OMP_PARALLEL_WORKSHARE
:
12019 omp_workshare_save
= omp_workshare_flag
;
12020 omp_workshare_flag
= 0;
12021 gfc_resolve_omp_directive (code
, ns
);
12022 omp_workshare_flag
= omp_workshare_save
;
12026 gfc_internal_error ("gfc_resolve_code(): Bad statement code");
12030 cs_base
= frame
.prev
;
12034 /* Resolve initial values and make sure they are compatible with
12038 resolve_values (gfc_symbol
*sym
)
12042 if (sym
->value
== NULL
)
12045 if (sym
->value
->expr_type
== EXPR_STRUCTURE
)
12046 t
= resolve_structure_cons (sym
->value
, 1);
12048 t
= gfc_resolve_expr (sym
->value
);
12053 gfc_check_assign_symbol (sym
, NULL
, sym
->value
);
12057 /* Verify any BIND(C) derived types in the namespace so we can report errors
12058 for them once, rather than for each variable declared of that type. */
12061 resolve_bind_c_derived_types (gfc_symbol
*derived_sym
)
12063 if (derived_sym
!= NULL
&& derived_sym
->attr
.flavor
== FL_DERIVED
12064 && derived_sym
->attr
.is_bind_c
== 1)
12065 verify_bind_c_derived_type (derived_sym
);
12071 /* Check the interfaces of DTIO procedures associated with derived
12072 type 'sym'. These procedures can either have typebound bindings or
12073 can appear in DTIO generic interfaces. */
12076 gfc_verify_DTIO_procedures (gfc_symbol
*sym
)
12078 if (!sym
|| sym
->attr
.flavor
!= FL_DERIVED
)
12081 gfc_check_dtio_interfaces (sym
);
12086 /* Verify that any binding labels used in a given namespace do not collide
12087 with the names or binding labels of any global symbols. Multiple INTERFACE
12088 for the same procedure are permitted. */
12091 gfc_verify_binding_labels (gfc_symbol
*sym
)
12094 const char *module
;
12096 if (!sym
|| !sym
->attr
.is_bind_c
|| sym
->attr
.is_iso_c
12097 || sym
->attr
.flavor
== FL_DERIVED
|| !sym
->binding_label
)
12100 gsym
= gfc_find_case_gsymbol (gfc_gsym_root
, sym
->binding_label
);
12103 module
= sym
->module
;
12104 else if (sym
->ns
&& sym
->ns
->proc_name
12105 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
12106 module
= sym
->ns
->proc_name
->name
;
12107 else if (sym
->ns
&& sym
->ns
->parent
12108 && sym
->ns
&& sym
->ns
->parent
->proc_name
12109 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12110 module
= sym
->ns
->parent
->proc_name
->name
;
12116 && (gsym
->type
== GSYM_FUNCTION
|| gsym
->type
== GSYM_SUBROUTINE
)))
12119 gsym
= gfc_get_gsymbol (sym
->binding_label
, true);
12120 gsym
->where
= sym
->declared_at
;
12121 gsym
->sym_name
= sym
->name
;
12122 gsym
->binding_label
= sym
->binding_label
;
12123 gsym
->ns
= sym
->ns
;
12124 gsym
->mod_name
= module
;
12125 if (sym
->attr
.function
)
12126 gsym
->type
= GSYM_FUNCTION
;
12127 else if (sym
->attr
.subroutine
)
12128 gsym
->type
= GSYM_SUBROUTINE
;
12129 /* Mark as variable/procedure as defined, unless its an INTERFACE. */
12130 gsym
->defined
= sym
->attr
.if_source
!= IFSRC_IFBODY
;
12134 if (sym
->attr
.flavor
== FL_VARIABLE
&& gsym
->type
!= GSYM_UNKNOWN
)
12136 gfc_error ("Variable %qs with binding label %qs at %L uses the same global "
12137 "identifier as entity at %L", sym
->name
,
12138 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
12139 /* Clear the binding label to prevent checking multiple times. */
12140 sym
->binding_label
= NULL
;
12144 if (sym
->attr
.flavor
== FL_VARIABLE
&& module
12145 && (strcmp (module
, gsym
->mod_name
) != 0
12146 || strcmp (sym
->name
, gsym
->sym_name
) != 0))
12148 /* This can only happen if the variable is defined in a module - if it
12149 isn't the same module, reject it. */
12150 gfc_error ("Variable %qs from module %qs with binding label %qs at %L "
12151 "uses the same global identifier as entity at %L from module %qs",
12152 sym
->name
, module
, sym
->binding_label
,
12153 &sym
->declared_at
, &gsym
->where
, gsym
->mod_name
);
12154 sym
->binding_label
= NULL
;
12158 if ((sym
->attr
.function
|| sym
->attr
.subroutine
)
12159 && ((gsym
->type
!= GSYM_SUBROUTINE
&& gsym
->type
!= GSYM_FUNCTION
)
12160 || (gsym
->defined
&& sym
->attr
.if_source
!= IFSRC_IFBODY
))
12161 && (sym
!= gsym
->ns
->proc_name
&& sym
->attr
.entry
== 0)
12162 && (module
!= gsym
->mod_name
12163 || strcmp (gsym
->sym_name
, sym
->name
) != 0
12164 || (module
&& strcmp (module
, gsym
->mod_name
) != 0)))
12166 /* Print an error if the procedure is defined multiple times; we have to
12167 exclude references to the same procedure via module association or
12168 multiple checks for the same procedure. */
12169 gfc_error ("Procedure %qs with binding label %qs at %L uses the same "
12170 "global identifier as entity at %L", sym
->name
,
12171 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
12172 sym
->binding_label
= NULL
;
12177 /* Resolve an index expression. */
12180 resolve_index_expr (gfc_expr
*e
)
12182 if (!gfc_resolve_expr (e
))
12185 if (!gfc_simplify_expr (e
, 0))
12188 if (!gfc_specification_expr (e
))
12195 /* Resolve a charlen structure. */
12198 resolve_charlen (gfc_charlen
*cl
)
12201 bool saved_specification_expr
;
12207 saved_specification_expr
= specification_expr
;
12208 specification_expr
= true;
12210 if (cl
->length_from_typespec
)
12212 if (!gfc_resolve_expr (cl
->length
))
12214 specification_expr
= saved_specification_expr
;
12218 if (!gfc_simplify_expr (cl
->length
, 0))
12220 specification_expr
= saved_specification_expr
;
12224 /* cl->length has been resolved. It should have an integer type. */
12225 if (cl
->length
->ts
.type
!= BT_INTEGER
)
12227 gfc_error ("Scalar INTEGER expression expected at %L",
12228 &cl
->length
->where
);
12234 if (!resolve_index_expr (cl
->length
))
12236 specification_expr
= saved_specification_expr
;
12241 /* F2008, 4.4.3.2: If the character length parameter value evaluates to
12242 a negative value, the length of character entities declared is zero. */
12243 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
12244 && mpz_sgn (cl
->length
->value
.integer
) < 0)
12245 gfc_replace_expr (cl
->length
,
12246 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 0));
12248 /* Check that the character length is not too large. */
12249 k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
12250 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
12251 && cl
->length
->ts
.type
== BT_INTEGER
12252 && mpz_cmp (cl
->length
->value
.integer
, gfc_integer_kinds
[k
].huge
) > 0)
12254 gfc_error ("String length at %L is too large", &cl
->length
->where
);
12255 specification_expr
= saved_specification_expr
;
12259 specification_expr
= saved_specification_expr
;
12264 /* Test for non-constant shape arrays. */
12267 is_non_constant_shape_array (gfc_symbol
*sym
)
12273 not_constant
= false;
12274 if (sym
->as
!= NULL
)
12276 /* Unfortunately, !gfc_is_compile_time_shape hits a legal case that
12277 has not been simplified; parameter array references. Do the
12278 simplification now. */
12279 for (i
= 0; i
< sym
->as
->rank
+ sym
->as
->corank
; i
++)
12281 e
= sym
->as
->lower
[i
];
12282 if (e
&& (!resolve_index_expr(e
)
12283 || !gfc_is_constant_expr (e
)))
12284 not_constant
= true;
12285 e
= sym
->as
->upper
[i
];
12286 if (e
&& (!resolve_index_expr(e
)
12287 || !gfc_is_constant_expr (e
)))
12288 not_constant
= true;
12291 return not_constant
;
12294 /* Given a symbol and an initialization expression, add code to initialize
12295 the symbol to the function entry. */
12297 build_init_assign (gfc_symbol
*sym
, gfc_expr
*init
)
12301 gfc_namespace
*ns
= sym
->ns
;
12303 /* Search for the function namespace if this is a contained
12304 function without an explicit result. */
12305 if (sym
->attr
.function
&& sym
== sym
->result
12306 && sym
->name
!= sym
->ns
->proc_name
->name
)
12308 ns
= ns
->contained
;
12309 for (;ns
; ns
= ns
->sibling
)
12310 if (strcmp (ns
->proc_name
->name
, sym
->name
) == 0)
12316 gfc_free_expr (init
);
12320 /* Build an l-value expression for the result. */
12321 lval
= gfc_lval_expr_from_sym (sym
);
12323 /* Add the code at scope entry. */
12324 init_st
= gfc_get_code (EXEC_INIT_ASSIGN
);
12325 init_st
->next
= ns
->code
;
12326 ns
->code
= init_st
;
12328 /* Assign the default initializer to the l-value. */
12329 init_st
->loc
= sym
->declared_at
;
12330 init_st
->expr1
= lval
;
12331 init_st
->expr2
= init
;
12335 /* Whether or not we can generate a default initializer for a symbol. */
12338 can_generate_init (gfc_symbol
*sym
)
12340 symbol_attribute
*a
;
12345 /* These symbols should never have a default initialization. */
12350 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
12351 && (CLASS_DATA (sym
)->attr
.class_pointer
12352 || CLASS_DATA (sym
)->attr
.proc_pointer
))
12353 || a
->in_equivalence
12360 || (!a
->referenced
&& !a
->result
)
12361 || (a
->dummy
&& a
->intent
!= INTENT_OUT
)
12362 || (a
->function
&& sym
!= sym
->result
)
12367 /* Assign the default initializer to a derived type variable or result. */
12370 apply_default_init (gfc_symbol
*sym
)
12372 gfc_expr
*init
= NULL
;
12374 if (sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12377 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
)
12378 init
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12380 if (init
== NULL
&& sym
->ts
.type
!= BT_CLASS
)
12383 build_init_assign (sym
, init
);
12384 sym
->attr
.referenced
= 1;
12388 /* Build an initializer for a local. Returns null if the symbol should not have
12389 a default initialization. */
12392 build_default_init_expr (gfc_symbol
*sym
)
12394 /* These symbols should never have a default initialization. */
12395 if (sym
->attr
.allocatable
12396 || sym
->attr
.external
12398 || sym
->attr
.pointer
12399 || sym
->attr
.in_equivalence
12400 || sym
->attr
.in_common
12403 || sym
->attr
.cray_pointee
12404 || sym
->attr
.cray_pointer
12408 /* Get the appropriate init expression. */
12409 return gfc_build_default_init_expr (&sym
->ts
, &sym
->declared_at
);
12412 /* Add an initialization expression to a local variable. */
12414 apply_default_init_local (gfc_symbol
*sym
)
12416 gfc_expr
*init
= NULL
;
12418 /* The symbol should be a variable or a function return value. */
12419 if ((sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12420 || (sym
->attr
.function
&& sym
->result
!= sym
))
12423 /* Try to build the initializer expression. If we can't initialize
12424 this symbol, then init will be NULL. */
12425 init
= build_default_init_expr (sym
);
12429 /* For saved variables, we don't want to add an initializer at function
12430 entry, so we just add a static initializer. Note that automatic variables
12431 are stack allocated even with -fno-automatic; we have also to exclude
12432 result variable, which are also nonstatic. */
12433 if (!sym
->attr
.automatic
12434 && (sym
->attr
.save
|| sym
->ns
->save_all
12435 || (flag_max_stack_var_size
== 0 && !sym
->attr
.result
12436 && (sym
->ns
->proc_name
&& !sym
->ns
->proc_name
->attr
.recursive
)
12437 && (!sym
->attr
.dimension
|| !is_non_constant_shape_array (sym
)))))
12439 /* Don't clobber an existing initializer! */
12440 gcc_assert (sym
->value
== NULL
);
12445 build_init_assign (sym
, init
);
12449 /* Resolution of common features of flavors variable and procedure. */
12452 resolve_fl_var_and_proc (gfc_symbol
*sym
, int mp_flag
)
12454 gfc_array_spec
*as
;
12456 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12457 as
= CLASS_DATA (sym
)->as
;
12461 /* Constraints on deferred shape variable. */
12462 if (as
== NULL
|| as
->type
!= AS_DEFERRED
)
12464 bool pointer
, allocatable
, dimension
;
12466 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12468 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
12469 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
12470 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
12474 pointer
= sym
->attr
.pointer
&& !sym
->attr
.select_type_temporary
;
12475 allocatable
= sym
->attr
.allocatable
;
12476 dimension
= sym
->attr
.dimension
;
12481 if (dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12483 gfc_error ("Allocatable array %qs at %L must have a deferred "
12484 "shape or assumed rank", sym
->name
, &sym
->declared_at
);
12487 else if (!gfc_notify_std (GFC_STD_F2003
, "Scalar object "
12488 "%qs at %L may not be ALLOCATABLE",
12489 sym
->name
, &sym
->declared_at
))
12493 if (pointer
&& dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12495 gfc_error ("Array pointer %qs at %L must have a deferred shape or "
12496 "assumed rank", sym
->name
, &sym
->declared_at
);
12502 if (!mp_flag
&& !sym
->attr
.allocatable
&& !sym
->attr
.pointer
12503 && sym
->ts
.type
!= BT_CLASS
&& !sym
->assoc
)
12505 gfc_error ("Array %qs at %L cannot have a deferred shape",
12506 sym
->name
, &sym
->declared_at
);
12511 /* Constraints on polymorphic variables. */
12512 if (sym
->ts
.type
== BT_CLASS
&& !(sym
->result
&& sym
->result
!= sym
))
12515 if (sym
->attr
.class_ok
12516 && !sym
->attr
.select_type_temporary
12517 && !UNLIMITED_POLY (sym
)
12518 && !gfc_type_is_extensible (CLASS_DATA (sym
)->ts
.u
.derived
))
12520 gfc_error ("Type %qs of CLASS variable %qs at %L is not extensible",
12521 CLASS_DATA (sym
)->ts
.u
.derived
->name
, sym
->name
,
12522 &sym
->declared_at
);
12527 /* Assume that use associated symbols were checked in the module ns.
12528 Class-variables that are associate-names are also something special
12529 and excepted from the test. */
12530 if (!sym
->attr
.class_ok
&& !sym
->attr
.use_assoc
&& !sym
->assoc
)
12532 gfc_error ("CLASS variable %qs at %L must be dummy, allocatable "
12533 "or pointer", sym
->name
, &sym
->declared_at
);
12542 /* Additional checks for symbols with flavor variable and derived
12543 type. To be called from resolve_fl_variable. */
12546 resolve_fl_variable_derived (gfc_symbol
*sym
, int no_init_flag
)
12548 gcc_assert (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
);
12550 /* Check to see if a derived type is blocked from being host
12551 associated by the presence of another class I symbol in the same
12552 namespace. 14.6.1.3 of the standard and the discussion on
12553 comp.lang.fortran. */
12554 if (sym
->ns
!= sym
->ts
.u
.derived
->ns
12555 && !sym
->ts
.u
.derived
->attr
.use_assoc
12556 && sym
->ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
12559 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 0, &s
);
12560 if (s
&& s
->attr
.generic
)
12561 s
= gfc_find_dt_in_generic (s
);
12562 if (s
&& !gfc_fl_struct (s
->attr
.flavor
))
12564 gfc_error ("The type %qs cannot be host associated at %L "
12565 "because it is blocked by an incompatible object "
12566 "of the same name declared at %L",
12567 sym
->ts
.u
.derived
->name
, &sym
->declared_at
,
12573 /* 4th constraint in section 11.3: "If an object of a type for which
12574 component-initialization is specified (R429) appears in the
12575 specification-part of a module and does not have the ALLOCATABLE
12576 or POINTER attribute, the object shall have the SAVE attribute."
12578 The check for initializers is performed with
12579 gfc_has_default_initializer because gfc_default_initializer generates
12580 a hidden default for allocatable components. */
12581 if (!(sym
->value
|| no_init_flag
) && sym
->ns
->proc_name
12582 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12583 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
) && !sym
->attr
.save
12584 && !sym
->attr
.pointer
&& !sym
->attr
.allocatable
12585 && gfc_has_default_initializer (sym
->ts
.u
.derived
)
12586 && !gfc_notify_std (GFC_STD_F2008
, "Implied SAVE for module variable "
12587 "%qs at %L, needed due to the default "
12588 "initialization", sym
->name
, &sym
->declared_at
))
12591 /* Assign default initializer. */
12592 if (!(sym
->value
|| sym
->attr
.pointer
|| sym
->attr
.allocatable
)
12593 && (!no_init_flag
|| sym
->attr
.intent
== INTENT_OUT
))
12594 sym
->value
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12600 /* F2008, C402 (R401): A colon shall not be used as a type-param-value
12601 except in the declaration of an entity or component that has the POINTER
12602 or ALLOCATABLE attribute. */
12605 deferred_requirements (gfc_symbol
*sym
)
12607 if (sym
->ts
.deferred
12608 && !(sym
->attr
.pointer
12609 || sym
->attr
.allocatable
12610 || sym
->attr
.associate_var
12611 || sym
->attr
.omp_udr_artificial_var
))
12613 /* If a function has a result variable, only check the variable. */
12614 if (sym
->result
&& sym
->name
!= sym
->result
->name
)
12617 gfc_error ("Entity %qs at %L has a deferred type parameter and "
12618 "requires either the POINTER or ALLOCATABLE attribute",
12619 sym
->name
, &sym
->declared_at
);
12626 /* Resolve symbols with flavor variable. */
12629 resolve_fl_variable (gfc_symbol
*sym
, int mp_flag
)
12631 const char *auto_save_msg
= "Automatic object %qs at %L cannot have the "
12634 if (!resolve_fl_var_and_proc (sym
, mp_flag
))
12637 /* Set this flag to check that variables are parameters of all entries.
12638 This check is effected by the call to gfc_resolve_expr through
12639 is_non_constant_shape_array. */
12640 bool saved_specification_expr
= specification_expr
;
12641 specification_expr
= true;
12643 if (sym
->ns
->proc_name
12644 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12645 || sym
->ns
->proc_name
->attr
.is_main_program
)
12646 && !sym
->attr
.use_assoc
12647 && !sym
->attr
.allocatable
12648 && !sym
->attr
.pointer
12649 && is_non_constant_shape_array (sym
))
12651 /* F08:C541. The shape of an array defined in a main program or module
12652 * needs to be constant. */
12653 gfc_error ("The module or main program array %qs at %L must "
12654 "have constant shape", sym
->name
, &sym
->declared_at
);
12655 specification_expr
= saved_specification_expr
;
12659 /* Constraints on deferred type parameter. */
12660 if (!deferred_requirements (sym
))
12663 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.associate_var
)
12665 /* Make sure that character string variables with assumed length are
12666 dummy arguments. */
12667 gfc_expr
*e
= NULL
;
12670 e
= sym
->ts
.u
.cl
->length
;
12674 if (e
== NULL
&& !sym
->attr
.dummy
&& !sym
->attr
.result
12675 && !sym
->ts
.deferred
&& !sym
->attr
.select_type_temporary
12676 && !sym
->attr
.omp_udr_artificial_var
)
12678 gfc_error ("Entity with assumed character length at %L must be a "
12679 "dummy argument or a PARAMETER", &sym
->declared_at
);
12680 specification_expr
= saved_specification_expr
;
12684 if (e
&& sym
->attr
.save
== SAVE_EXPLICIT
&& !gfc_is_constant_expr (e
))
12686 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12687 specification_expr
= saved_specification_expr
;
12691 if (!gfc_is_constant_expr (e
)
12692 && !(e
->expr_type
== EXPR_VARIABLE
12693 && e
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
))
12695 if (!sym
->attr
.use_assoc
&& sym
->ns
->proc_name
12696 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12697 || sym
->ns
->proc_name
->attr
.is_main_program
))
12699 gfc_error ("%qs at %L must have constant character length "
12700 "in this context", sym
->name
, &sym
->declared_at
);
12701 specification_expr
= saved_specification_expr
;
12704 if (sym
->attr
.in_common
)
12706 gfc_error ("COMMON variable %qs at %L must have constant "
12707 "character length", sym
->name
, &sym
->declared_at
);
12708 specification_expr
= saved_specification_expr
;
12714 if (sym
->value
== NULL
&& sym
->attr
.referenced
)
12715 apply_default_init_local (sym
); /* Try to apply a default initialization. */
12717 /* Determine if the symbol may not have an initializer. */
12718 int no_init_flag
= 0, automatic_flag
= 0;
12719 if (sym
->attr
.allocatable
|| sym
->attr
.external
|| sym
->attr
.dummy
12720 || sym
->attr
.intrinsic
|| sym
->attr
.result
)
12722 else if ((sym
->attr
.dimension
|| sym
->attr
.codimension
) && !sym
->attr
.pointer
12723 && is_non_constant_shape_array (sym
))
12725 no_init_flag
= automatic_flag
= 1;
12727 /* Also, they must not have the SAVE attribute.
12728 SAVE_IMPLICIT is checked below. */
12729 if (sym
->as
&& sym
->attr
.codimension
)
12731 int corank
= sym
->as
->corank
;
12732 sym
->as
->corank
= 0;
12733 no_init_flag
= automatic_flag
= is_non_constant_shape_array (sym
);
12734 sym
->as
->corank
= corank
;
12736 if (automatic_flag
&& sym
->attr
.save
== SAVE_EXPLICIT
)
12738 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12739 specification_expr
= saved_specification_expr
;
12744 /* Ensure that any initializer is simplified. */
12746 gfc_simplify_expr (sym
->value
, 1);
12748 /* Reject illegal initializers. */
12749 if (!sym
->mark
&& sym
->value
)
12751 if (sym
->attr
.allocatable
|| (sym
->ts
.type
== BT_CLASS
12752 && CLASS_DATA (sym
)->attr
.allocatable
))
12753 gfc_error ("Allocatable %qs at %L cannot have an initializer",
12754 sym
->name
, &sym
->declared_at
);
12755 else if (sym
->attr
.external
)
12756 gfc_error ("External %qs at %L cannot have an initializer",
12757 sym
->name
, &sym
->declared_at
);
12758 else if (sym
->attr
.dummy
12759 && !(sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.intent
== INTENT_OUT
))
12760 gfc_error ("Dummy %qs at %L cannot have an initializer",
12761 sym
->name
, &sym
->declared_at
);
12762 else if (sym
->attr
.intrinsic
)
12763 gfc_error ("Intrinsic %qs at %L cannot have an initializer",
12764 sym
->name
, &sym
->declared_at
);
12765 else if (sym
->attr
.result
)
12766 gfc_error ("Function result %qs at %L cannot have an initializer",
12767 sym
->name
, &sym
->declared_at
);
12768 else if (automatic_flag
)
12769 gfc_error ("Automatic array %qs at %L cannot have an initializer",
12770 sym
->name
, &sym
->declared_at
);
12772 goto no_init_error
;
12773 specification_expr
= saved_specification_expr
;
12778 if (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
)
12780 bool res
= resolve_fl_variable_derived (sym
, no_init_flag
);
12781 specification_expr
= saved_specification_expr
;
12785 specification_expr
= saved_specification_expr
;
12790 /* Compare the dummy characteristics of a module procedure interface
12791 declaration with the corresponding declaration in a submodule. */
12792 static gfc_formal_arglist
*new_formal
;
12793 static char errmsg
[200];
12796 compare_fsyms (gfc_symbol
*sym
)
12800 if (sym
== NULL
|| new_formal
== NULL
)
12803 fsym
= new_formal
->sym
;
12808 if (strcmp (sym
->name
, fsym
->name
) == 0)
12810 if (!gfc_check_dummy_characteristics (fsym
, sym
, true, errmsg
, 200))
12811 gfc_error ("%s at %L", errmsg
, &fsym
->declared_at
);
12816 /* Resolve a procedure. */
12819 resolve_fl_procedure (gfc_symbol
*sym
, int mp_flag
)
12821 gfc_formal_arglist
*arg
;
12823 if (sym
->attr
.function
12824 && !resolve_fl_var_and_proc (sym
, mp_flag
))
12827 /* Constraints on deferred type parameter. */
12828 if (!deferred_requirements (sym
))
12831 if (sym
->ts
.type
== BT_CHARACTER
)
12833 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
12835 if (cl
&& cl
->length
&& gfc_is_constant_expr (cl
->length
)
12836 && !resolve_charlen (cl
))
12839 if ((!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
12840 && sym
->attr
.proc
== PROC_ST_FUNCTION
)
12842 gfc_error ("Character-valued statement function %qs at %L must "
12843 "have constant length", sym
->name
, &sym
->declared_at
);
12848 /* Ensure that derived type for are not of a private type. Internal
12849 module procedures are excluded by 2.2.3.3 - i.e., they are not
12850 externally accessible and can access all the objects accessible in
12852 if (!(sym
->ns
->parent
&& sym
->ns
->parent
->proc_name
12853 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12854 && gfc_check_symbol_access (sym
))
12856 gfc_interface
*iface
;
12858 for (arg
= gfc_sym_get_dummy_args (sym
); arg
; arg
= arg
->next
)
12861 && arg
->sym
->ts
.type
== BT_DERIVED
12862 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12863 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12864 && !gfc_notify_std (GFC_STD_F2003
, "%qs is of a PRIVATE type "
12865 "and cannot be a dummy argument"
12866 " of %qs, which is PUBLIC at %L",
12867 arg
->sym
->name
, sym
->name
,
12868 &sym
->declared_at
))
12870 /* Stop this message from recurring. */
12871 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12876 /* PUBLIC interfaces may expose PRIVATE procedures that take types
12877 PRIVATE to the containing module. */
12878 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
12880 for (arg
= gfc_sym_get_dummy_args (iface
->sym
); arg
; arg
= arg
->next
)
12883 && arg
->sym
->ts
.type
== BT_DERIVED
12884 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12885 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12886 && !gfc_notify_std (GFC_STD_F2003
, "Procedure %qs in "
12887 "PUBLIC interface %qs at %L "
12888 "takes dummy arguments of %qs which "
12889 "is PRIVATE", iface
->sym
->name
,
12890 sym
->name
, &iface
->sym
->declared_at
,
12891 gfc_typename(&arg
->sym
->ts
)))
12893 /* Stop this message from recurring. */
12894 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12901 if (sym
->attr
.function
&& sym
->value
&& sym
->attr
.proc
!= PROC_ST_FUNCTION
12902 && !sym
->attr
.proc_pointer
)
12904 gfc_error ("Function %qs at %L cannot have an initializer",
12905 sym
->name
, &sym
->declared_at
);
12907 /* Make sure no second error is issued for this. */
12908 sym
->value
->error
= 1;
12912 /* An external symbol may not have an initializer because it is taken to be
12913 a procedure. Exception: Procedure Pointers. */
12914 if (sym
->attr
.external
&& sym
->value
&& !sym
->attr
.proc_pointer
)
12916 gfc_error ("External object %qs at %L may not have an initializer",
12917 sym
->name
, &sym
->declared_at
);
12921 /* An elemental function is required to return a scalar 12.7.1 */
12922 if (sym
->attr
.elemental
&& sym
->attr
.function
12923 && (sym
->as
|| (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)))
12925 gfc_error ("ELEMENTAL function %qs at %L must have a scalar "
12926 "result", sym
->name
, &sym
->declared_at
);
12927 /* Reset so that the error only occurs once. */
12928 sym
->attr
.elemental
= 0;
12932 if (sym
->attr
.proc
== PROC_ST_FUNCTION
12933 && (sym
->attr
.allocatable
|| sym
->attr
.pointer
))
12935 gfc_error ("Statement function %qs at %L may not have pointer or "
12936 "allocatable attribute", sym
->name
, &sym
->declared_at
);
12940 /* 5.1.1.5 of the Standard: A function name declared with an asterisk
12941 char-len-param shall not be array-valued, pointer-valued, recursive
12942 or pure. ....snip... A character value of * may only be used in the
12943 following ways: (i) Dummy arg of procedure - dummy associates with
12944 actual length; (ii) To declare a named constant; or (iii) External
12945 function - but length must be declared in calling scoping unit. */
12946 if (sym
->attr
.function
12947 && sym
->ts
.type
== BT_CHARACTER
&& !sym
->ts
.deferred
12948 && sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
== NULL
)
12950 if ((sym
->as
&& sym
->as
->rank
) || (sym
->attr
.pointer
)
12951 || (sym
->attr
.recursive
) || (sym
->attr
.pure
))
12953 if (sym
->as
&& sym
->as
->rank
)
12954 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12955 "array-valued", sym
->name
, &sym
->declared_at
);
12957 if (sym
->attr
.pointer
)
12958 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12959 "pointer-valued", sym
->name
, &sym
->declared_at
);
12961 if (sym
->attr
.pure
)
12962 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12963 "pure", sym
->name
, &sym
->declared_at
);
12965 if (sym
->attr
.recursive
)
12966 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12967 "recursive", sym
->name
, &sym
->declared_at
);
12972 /* Appendix B.2 of the standard. Contained functions give an
12973 error anyway. Deferred character length is an F2003 feature.
12974 Don't warn on intrinsic conversion functions, which start
12975 with two underscores. */
12976 if (!sym
->attr
.contained
&& !sym
->ts
.deferred
12977 && (sym
->name
[0] != '_' || sym
->name
[1] != '_'))
12978 gfc_notify_std (GFC_STD_F95_OBS
,
12979 "CHARACTER(*) function %qs at %L",
12980 sym
->name
, &sym
->declared_at
);
12983 /* F2008, C1218. */
12984 if (sym
->attr
.elemental
)
12986 if (sym
->attr
.proc_pointer
)
12988 gfc_error ("Procedure pointer %qs at %L shall not be elemental",
12989 sym
->name
, &sym
->declared_at
);
12992 if (sym
->attr
.dummy
)
12994 gfc_error ("Dummy procedure %qs at %L shall not be elemental",
12995 sym
->name
, &sym
->declared_at
);
13000 /* F2018, C15100: "The result of an elemental function shall be scalar,
13001 and shall not have the POINTER or ALLOCATABLE attribute." The scalar
13002 pointer is tested and caught elsewhere. */
13003 if (sym
->attr
.elemental
&& sym
->result
13004 && (sym
->result
->attr
.allocatable
|| sym
->result
->attr
.pointer
))
13006 gfc_error ("Function result variable %qs at %L of elemental "
13007 "function %qs shall not have an ALLOCATABLE or POINTER "
13008 "attribute", sym
->result
->name
,
13009 &sym
->result
->declared_at
, sym
->name
);
13013 if (sym
->attr
.is_bind_c
&& sym
->attr
.is_c_interop
!= 1)
13015 gfc_formal_arglist
*curr_arg
;
13016 int has_non_interop_arg
= 0;
13018 if (!verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
13019 sym
->common_block
))
13021 /* Clear these to prevent looking at them again if there was an
13023 sym
->attr
.is_bind_c
= 0;
13024 sym
->attr
.is_c_interop
= 0;
13025 sym
->ts
.is_c_interop
= 0;
13029 /* So far, no errors have been found. */
13030 sym
->attr
.is_c_interop
= 1;
13031 sym
->ts
.is_c_interop
= 1;
13034 curr_arg
= gfc_sym_get_dummy_args (sym
);
13035 while (curr_arg
!= NULL
)
13037 /* Skip implicitly typed dummy args here. */
13038 if (curr_arg
->sym
&& curr_arg
->sym
->attr
.implicit_type
== 0)
13039 if (!gfc_verify_c_interop_param (curr_arg
->sym
))
13040 /* If something is found to fail, record the fact so we
13041 can mark the symbol for the procedure as not being
13042 BIND(C) to try and prevent multiple errors being
13044 has_non_interop_arg
= 1;
13046 curr_arg
= curr_arg
->next
;
13049 /* See if any of the arguments were not interoperable and if so, clear
13050 the procedure symbol to prevent duplicate error messages. */
13051 if (has_non_interop_arg
!= 0)
13053 sym
->attr
.is_c_interop
= 0;
13054 sym
->ts
.is_c_interop
= 0;
13055 sym
->attr
.is_bind_c
= 0;
13059 if (!sym
->attr
.proc_pointer
)
13061 if (sym
->attr
.save
== SAVE_EXPLICIT
)
13063 gfc_error ("PROCEDURE attribute conflicts with SAVE attribute "
13064 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13067 if (sym
->attr
.intent
)
13069 gfc_error ("PROCEDURE attribute conflicts with INTENT attribute "
13070 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13073 if (sym
->attr
.subroutine
&& sym
->attr
.result
)
13075 gfc_error ("PROCEDURE attribute conflicts with RESULT attribute "
13076 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13079 if (sym
->attr
.external
&& sym
->attr
.function
&& !sym
->attr
.module_procedure
13080 && ((sym
->attr
.if_source
== IFSRC_DECL
&& !sym
->attr
.procedure
)
13081 || sym
->attr
.contained
))
13083 gfc_error ("EXTERNAL attribute conflicts with FUNCTION attribute "
13084 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13087 if (strcmp ("ppr@", sym
->name
) == 0)
13089 gfc_error ("Procedure pointer result %qs at %L "
13090 "is missing the pointer attribute",
13091 sym
->ns
->proc_name
->name
, &sym
->declared_at
);
13096 /* Assume that a procedure whose body is not known has references
13097 to external arrays. */
13098 if (sym
->attr
.if_source
!= IFSRC_DECL
)
13099 sym
->attr
.array_outer_dependency
= 1;
13101 /* Compare the characteristics of a module procedure with the
13102 interface declaration. Ideally this would be done with
13103 gfc_compare_interfaces but, at present, the formal interface
13104 cannot be copied to the ts.interface. */
13105 if (sym
->attr
.module_procedure
13106 && sym
->attr
.if_source
== IFSRC_DECL
)
13109 char name
[2*GFC_MAX_SYMBOL_LEN
+ 1];
13111 char *submodule_name
;
13112 strcpy (name
, sym
->ns
->proc_name
->name
);
13113 module_name
= strtok (name
, ".");
13114 submodule_name
= strtok (NULL
, ".");
13116 iface
= sym
->tlink
;
13119 /* Make sure that the result uses the correct charlen for deferred
13121 if (iface
&& sym
->result
13122 && iface
->ts
.type
== BT_CHARACTER
13123 && iface
->ts
.deferred
)
13124 sym
->result
->ts
.u
.cl
= iface
->ts
.u
.cl
;
13129 /* Check the procedure characteristics. */
13130 if (sym
->attr
.elemental
!= iface
->attr
.elemental
)
13132 gfc_error ("Mismatch in ELEMENTAL attribute between MODULE "
13133 "PROCEDURE at %L and its interface in %s",
13134 &sym
->declared_at
, module_name
);
13138 if (sym
->attr
.pure
!= iface
->attr
.pure
)
13140 gfc_error ("Mismatch in PURE attribute between MODULE "
13141 "PROCEDURE at %L and its interface in %s",
13142 &sym
->declared_at
, module_name
);
13146 if (sym
->attr
.recursive
!= iface
->attr
.recursive
)
13148 gfc_error ("Mismatch in RECURSIVE attribute between MODULE "
13149 "PROCEDURE at %L and its interface in %s",
13150 &sym
->declared_at
, module_name
);
13154 /* Check the result characteristics. */
13155 if (!gfc_check_result_characteristics (sym
, iface
, errmsg
, 200))
13157 gfc_error ("%s between the MODULE PROCEDURE declaration "
13158 "in MODULE %qs and the declaration at %L in "
13160 errmsg
, module_name
, &sym
->declared_at
,
13161 submodule_name
? submodule_name
: module_name
);
13166 /* Check the characteristics of the formal arguments. */
13167 if (sym
->formal
&& sym
->formal_ns
)
13169 for (arg
= sym
->formal
; arg
&& arg
->sym
; arg
= arg
->next
)
13172 gfc_traverse_ns (sym
->formal_ns
, compare_fsyms
);
13180 /* Resolve a list of finalizer procedures. That is, after they have hopefully
13181 been defined and we now know their defined arguments, check that they fulfill
13182 the requirements of the standard for procedures used as finalizers. */
13185 gfc_resolve_finalizers (gfc_symbol
* derived
, bool *finalizable
)
13187 gfc_finalizer
* list
;
13188 gfc_finalizer
** prev_link
; /* For removing wrong entries from the list. */
13189 bool result
= true;
13190 bool seen_scalar
= false;
13193 gfc_symbol
*parent
= gfc_get_derived_super_type (derived
);
13196 gfc_resolve_finalizers (parent
, finalizable
);
13198 /* Ensure that derived-type components have a their finalizers resolved. */
13199 bool has_final
= derived
->f2k_derived
&& derived
->f2k_derived
->finalizers
;
13200 for (c
= derived
->components
; c
; c
= c
->next
)
13201 if (c
->ts
.type
== BT_DERIVED
13202 && !c
->attr
.pointer
&& !c
->attr
.proc_pointer
&& !c
->attr
.allocatable
)
13204 bool has_final2
= false;
13205 if (!gfc_resolve_finalizers (c
->ts
.u
.derived
, &has_final2
))
13206 return false; /* Error. */
13207 has_final
= has_final
|| has_final2
;
13209 /* Return early if not finalizable. */
13213 *finalizable
= false;
13217 /* Walk over the list of finalizer-procedures, check them, and if any one
13218 does not fit in with the standard's definition, print an error and remove
13219 it from the list. */
13220 prev_link
= &derived
->f2k_derived
->finalizers
;
13221 for (list
= derived
->f2k_derived
->finalizers
; list
; list
= *prev_link
)
13223 gfc_formal_arglist
*dummy_args
;
13228 /* Skip this finalizer if we already resolved it. */
13229 if (list
->proc_tree
)
13231 if (list
->proc_tree
->n
.sym
->formal
->sym
->as
== NULL
13232 || list
->proc_tree
->n
.sym
->formal
->sym
->as
->rank
== 0)
13233 seen_scalar
= true;
13234 prev_link
= &(list
->next
);
13238 /* Check this exists and is a SUBROUTINE. */
13239 if (!list
->proc_sym
->attr
.subroutine
)
13241 gfc_error ("FINAL procedure %qs at %L is not a SUBROUTINE",
13242 list
->proc_sym
->name
, &list
->where
);
13246 /* We should have exactly one argument. */
13247 dummy_args
= gfc_sym_get_dummy_args (list
->proc_sym
);
13248 if (!dummy_args
|| dummy_args
->next
)
13250 gfc_error ("FINAL procedure at %L must have exactly one argument",
13254 arg
= dummy_args
->sym
;
13256 /* This argument must be of our type. */
13257 if (arg
->ts
.type
!= BT_DERIVED
|| arg
->ts
.u
.derived
!= derived
)
13259 gfc_error ("Argument of FINAL procedure at %L must be of type %qs",
13260 &arg
->declared_at
, derived
->name
);
13264 /* It must neither be a pointer nor allocatable nor optional. */
13265 if (arg
->attr
.pointer
)
13267 gfc_error ("Argument of FINAL procedure at %L must not be a POINTER",
13268 &arg
->declared_at
);
13271 if (arg
->attr
.allocatable
)
13273 gfc_error ("Argument of FINAL procedure at %L must not be"
13274 " ALLOCATABLE", &arg
->declared_at
);
13277 if (arg
->attr
.optional
)
13279 gfc_error ("Argument of FINAL procedure at %L must not be OPTIONAL",
13280 &arg
->declared_at
);
13284 /* It must not be INTENT(OUT). */
13285 if (arg
->attr
.intent
== INTENT_OUT
)
13287 gfc_error ("Argument of FINAL procedure at %L must not be"
13288 " INTENT(OUT)", &arg
->declared_at
);
13292 /* Warn if the procedure is non-scalar and not assumed shape. */
13293 if (warn_surprising
&& arg
->as
&& arg
->as
->rank
!= 0
13294 && arg
->as
->type
!= AS_ASSUMED_SHAPE
)
13295 gfc_warning (OPT_Wsurprising
,
13296 "Non-scalar FINAL procedure at %L should have assumed"
13297 " shape argument", &arg
->declared_at
);
13299 /* Check that it does not match in kind and rank with a FINAL procedure
13300 defined earlier. To really loop over the *earlier* declarations,
13301 we need to walk the tail of the list as new ones were pushed at the
13303 /* TODO: Handle kind parameters once they are implemented. */
13304 my_rank
= (arg
->as
? arg
->as
->rank
: 0);
13305 for (i
= list
->next
; i
; i
= i
->next
)
13307 gfc_formal_arglist
*dummy_args
;
13309 /* Argument list might be empty; that is an error signalled earlier,
13310 but we nevertheless continued resolving. */
13311 dummy_args
= gfc_sym_get_dummy_args (i
->proc_sym
);
13314 gfc_symbol
* i_arg
= dummy_args
->sym
;
13315 const int i_rank
= (i_arg
->as
? i_arg
->as
->rank
: 0);
13316 if (i_rank
== my_rank
)
13318 gfc_error ("FINAL procedure %qs declared at %L has the same"
13319 " rank (%d) as %qs",
13320 list
->proc_sym
->name
, &list
->where
, my_rank
,
13321 i
->proc_sym
->name
);
13327 /* Is this the/a scalar finalizer procedure? */
13329 seen_scalar
= true;
13331 /* Find the symtree for this procedure. */
13332 gcc_assert (!list
->proc_tree
);
13333 list
->proc_tree
= gfc_find_sym_in_symtree (list
->proc_sym
);
13335 prev_link
= &list
->next
;
13338 /* Remove wrong nodes immediately from the list so we don't risk any
13339 troubles in the future when they might fail later expectations. */
13342 *prev_link
= list
->next
;
13343 gfc_free_finalizer (i
);
13347 if (result
== false)
13350 /* Warn if we haven't seen a scalar finalizer procedure (but we know there
13351 were nodes in the list, must have been for arrays. It is surely a good
13352 idea to have a scalar version there if there's something to finalize. */
13353 if (warn_surprising
&& derived
->f2k_derived
->finalizers
&& !seen_scalar
)
13354 gfc_warning (OPT_Wsurprising
,
13355 "Only array FINAL procedures declared for derived type %qs"
13356 " defined at %L, suggest also scalar one",
13357 derived
->name
, &derived
->declared_at
);
13359 vtab
= gfc_find_derived_vtab (derived
);
13360 c
= vtab
->ts
.u
.derived
->components
->next
->next
->next
->next
->next
;
13361 gfc_set_sym_referenced (c
->initializer
->symtree
->n
.sym
);
13364 *finalizable
= true;
13370 /* Check if two GENERIC targets are ambiguous and emit an error is they are. */
13373 check_generic_tbp_ambiguity (gfc_tbp_generic
* t1
, gfc_tbp_generic
* t2
,
13374 const char* generic_name
, locus where
)
13376 gfc_symbol
*sym1
, *sym2
;
13377 const char *pass1
, *pass2
;
13378 gfc_formal_arglist
*dummy_args
;
13380 gcc_assert (t1
->specific
&& t2
->specific
);
13381 gcc_assert (!t1
->specific
->is_generic
);
13382 gcc_assert (!t2
->specific
->is_generic
);
13383 gcc_assert (t1
->is_operator
== t2
->is_operator
);
13385 sym1
= t1
->specific
->u
.specific
->n
.sym
;
13386 sym2
= t2
->specific
->u
.specific
->n
.sym
;
13391 /* Both must be SUBROUTINEs or both must be FUNCTIONs. */
13392 if (sym1
->attr
.subroutine
!= sym2
->attr
.subroutine
13393 || sym1
->attr
.function
!= sym2
->attr
.function
)
13395 gfc_error ("%qs and %qs cannot be mixed FUNCTION/SUBROUTINE for"
13396 " GENERIC %qs at %L",
13397 sym1
->name
, sym2
->name
, generic_name
, &where
);
13401 /* Determine PASS arguments. */
13402 if (t1
->specific
->nopass
)
13404 else if (t1
->specific
->pass_arg
)
13405 pass1
= t1
->specific
->pass_arg
;
13408 dummy_args
= gfc_sym_get_dummy_args (t1
->specific
->u
.specific
->n
.sym
);
13410 pass1
= dummy_args
->sym
->name
;
13414 if (t2
->specific
->nopass
)
13416 else if (t2
->specific
->pass_arg
)
13417 pass2
= t2
->specific
->pass_arg
;
13420 dummy_args
= gfc_sym_get_dummy_args (t2
->specific
->u
.specific
->n
.sym
);
13422 pass2
= dummy_args
->sym
->name
;
13427 /* Compare the interfaces. */
13428 if (gfc_compare_interfaces (sym1
, sym2
, sym2
->name
, !t1
->is_operator
, 0,
13429 NULL
, 0, pass1
, pass2
))
13431 gfc_error ("%qs and %qs for GENERIC %qs at %L are ambiguous",
13432 sym1
->name
, sym2
->name
, generic_name
, &where
);
13440 /* Worker function for resolving a generic procedure binding; this is used to
13441 resolve GENERIC as well as user and intrinsic OPERATOR typebound procedures.
13443 The difference between those cases is finding possible inherited bindings
13444 that are overridden, as one has to look for them in tb_sym_root,
13445 tb_uop_root or tb_op, respectively. Thus the caller must already find
13446 the super-type and set p->overridden correctly. */
13449 resolve_tb_generic_targets (gfc_symbol
* super_type
,
13450 gfc_typebound_proc
* p
, const char* name
)
13452 gfc_tbp_generic
* target
;
13453 gfc_symtree
* first_target
;
13454 gfc_symtree
* inherited
;
13456 gcc_assert (p
&& p
->is_generic
);
13458 /* Try to find the specific bindings for the symtrees in our target-list. */
13459 gcc_assert (p
->u
.generic
);
13460 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13461 if (!target
->specific
)
13463 gfc_typebound_proc
* overridden_tbp
;
13464 gfc_tbp_generic
* g
;
13465 const char* target_name
;
13467 target_name
= target
->specific_st
->name
;
13469 /* Defined for this type directly. */
13470 if (target
->specific_st
->n
.tb
&& !target
->specific_st
->n
.tb
->error
)
13472 target
->specific
= target
->specific_st
->n
.tb
;
13473 goto specific_found
;
13476 /* Look for an inherited specific binding. */
13479 inherited
= gfc_find_typebound_proc (super_type
, NULL
, target_name
,
13484 gcc_assert (inherited
->n
.tb
);
13485 target
->specific
= inherited
->n
.tb
;
13486 goto specific_found
;
13490 gfc_error ("Undefined specific binding %qs as target of GENERIC %qs"
13491 " at %L", target_name
, name
, &p
->where
);
13494 /* Once we've found the specific binding, check it is not ambiguous with
13495 other specifics already found or inherited for the same GENERIC. */
13497 gcc_assert (target
->specific
);
13499 /* This must really be a specific binding! */
13500 if (target
->specific
->is_generic
)
13502 gfc_error ("GENERIC %qs at %L must target a specific binding,"
13503 " %qs is GENERIC, too", name
, &p
->where
, target_name
);
13507 /* Check those already resolved on this type directly. */
13508 for (g
= p
->u
.generic
; g
; g
= g
->next
)
13509 if (g
!= target
&& g
->specific
13510 && !check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13513 /* Check for ambiguity with inherited specific targets. */
13514 for (overridden_tbp
= p
->overridden
; overridden_tbp
;
13515 overridden_tbp
= overridden_tbp
->overridden
)
13516 if (overridden_tbp
->is_generic
)
13518 for (g
= overridden_tbp
->u
.generic
; g
; g
= g
->next
)
13520 gcc_assert (g
->specific
);
13521 if (!check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13527 /* If we attempt to "overwrite" a specific binding, this is an error. */
13528 if (p
->overridden
&& !p
->overridden
->is_generic
)
13530 gfc_error ("GENERIC %qs at %L cannot overwrite specific binding with"
13531 " the same name", name
, &p
->where
);
13535 /* Take the SUBROUTINE/FUNCTION attributes of the first specific target, as
13536 all must have the same attributes here. */
13537 first_target
= p
->u
.generic
->specific
->u
.specific
;
13538 gcc_assert (first_target
);
13539 p
->subroutine
= first_target
->n
.sym
->attr
.subroutine
;
13540 p
->function
= first_target
->n
.sym
->attr
.function
;
13546 /* Resolve a GENERIC procedure binding for a derived type. */
13549 resolve_typebound_generic (gfc_symbol
* derived
, gfc_symtree
* st
)
13551 gfc_symbol
* super_type
;
13553 /* Find the overridden binding if any. */
13554 st
->n
.tb
->overridden
= NULL
;
13555 super_type
= gfc_get_derived_super_type (derived
);
13558 gfc_symtree
* overridden
;
13559 overridden
= gfc_find_typebound_proc (super_type
, NULL
, st
->name
,
13562 if (overridden
&& overridden
->n
.tb
)
13563 st
->n
.tb
->overridden
= overridden
->n
.tb
;
13566 /* Resolve using worker function. */
13567 return resolve_tb_generic_targets (super_type
, st
->n
.tb
, st
->name
);
13571 /* Retrieve the target-procedure of an operator binding and do some checks in
13572 common for intrinsic and user-defined type-bound operators. */
13575 get_checked_tb_operator_target (gfc_tbp_generic
* target
, locus where
)
13577 gfc_symbol
* target_proc
;
13579 gcc_assert (target
->specific
&& !target
->specific
->is_generic
);
13580 target_proc
= target
->specific
->u
.specific
->n
.sym
;
13581 gcc_assert (target_proc
);
13583 /* F08:C468. All operator bindings must have a passed-object dummy argument. */
13584 if (target
->specific
->nopass
)
13586 gfc_error ("Type-bound operator at %L cannot be NOPASS", &where
);
13590 return target_proc
;
13594 /* Resolve a type-bound intrinsic operator. */
13597 resolve_typebound_intrinsic_op (gfc_symbol
* derived
, gfc_intrinsic_op op
,
13598 gfc_typebound_proc
* p
)
13600 gfc_symbol
* super_type
;
13601 gfc_tbp_generic
* target
;
13603 /* If there's already an error here, do nothing (but don't fail again). */
13607 /* Operators should always be GENERIC bindings. */
13608 gcc_assert (p
->is_generic
);
13610 /* Look for an overridden binding. */
13611 super_type
= gfc_get_derived_super_type (derived
);
13612 if (super_type
&& super_type
->f2k_derived
)
13613 p
->overridden
= gfc_find_typebound_intrinsic_op (super_type
, NULL
,
13616 p
->overridden
= NULL
;
13618 /* Resolve general GENERIC properties using worker function. */
13619 if (!resolve_tb_generic_targets (super_type
, p
, gfc_op2string(op
)))
13622 /* Check the targets to be procedures of correct interface. */
13623 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13625 gfc_symbol
* target_proc
;
13627 target_proc
= get_checked_tb_operator_target (target
, p
->where
);
13631 if (!gfc_check_operator_interface (target_proc
, op
, p
->where
))
13634 /* Add target to non-typebound operator list. */
13635 if (!target
->specific
->deferred
&& !derived
->attr
.use_assoc
13636 && p
->access
!= ACCESS_PRIVATE
&& derived
->ns
== gfc_current_ns
)
13638 gfc_interface
*head
, *intr
;
13640 /* Preempt 'gfc_check_new_interface' for submodules, where the
13641 mechanism for handling module procedures winds up resolving
13642 operator interfaces twice and would otherwise cause an error. */
13643 for (intr
= derived
->ns
->op
[op
]; intr
; intr
= intr
->next
)
13644 if (intr
->sym
== target_proc
13645 && target_proc
->attr
.used_in_submodule
)
13648 if (!gfc_check_new_interface (derived
->ns
->op
[op
],
13649 target_proc
, p
->where
))
13651 head
= derived
->ns
->op
[op
];
13652 intr
= gfc_get_interface ();
13653 intr
->sym
= target_proc
;
13654 intr
->where
= p
->where
;
13656 derived
->ns
->op
[op
] = intr
;
13668 /* Resolve a type-bound user operator (tree-walker callback). */
13670 static gfc_symbol
* resolve_bindings_derived
;
13671 static bool resolve_bindings_result
;
13673 static bool check_uop_procedure (gfc_symbol
* sym
, locus where
);
13676 resolve_typebound_user_op (gfc_symtree
* stree
)
13678 gfc_symbol
* super_type
;
13679 gfc_tbp_generic
* target
;
13681 gcc_assert (stree
&& stree
->n
.tb
);
13683 if (stree
->n
.tb
->error
)
13686 /* Operators should always be GENERIC bindings. */
13687 gcc_assert (stree
->n
.tb
->is_generic
);
13689 /* Find overridden procedure, if any. */
13690 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13691 if (super_type
&& super_type
->f2k_derived
)
13693 gfc_symtree
* overridden
;
13694 overridden
= gfc_find_typebound_user_op (super_type
, NULL
,
13695 stree
->name
, true, NULL
);
13697 if (overridden
&& overridden
->n
.tb
)
13698 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13701 stree
->n
.tb
->overridden
= NULL
;
13703 /* Resolve basically using worker function. */
13704 if (!resolve_tb_generic_targets (super_type
, stree
->n
.tb
, stree
->name
))
13707 /* Check the targets to be functions of correct interface. */
13708 for (target
= stree
->n
.tb
->u
.generic
; target
; target
= target
->next
)
13710 gfc_symbol
* target_proc
;
13712 target_proc
= get_checked_tb_operator_target (target
, stree
->n
.tb
->where
);
13716 if (!check_uop_procedure (target_proc
, stree
->n
.tb
->where
))
13723 resolve_bindings_result
= false;
13724 stree
->n
.tb
->error
= 1;
13728 /* Resolve the type-bound procedures for a derived type. */
13731 resolve_typebound_procedure (gfc_symtree
* stree
)
13735 gfc_symbol
* me_arg
;
13736 gfc_symbol
* super_type
;
13737 gfc_component
* comp
;
13739 gcc_assert (stree
);
13741 /* Undefined specific symbol from GENERIC target definition. */
13745 if (stree
->n
.tb
->error
)
13748 /* If this is a GENERIC binding, use that routine. */
13749 if (stree
->n
.tb
->is_generic
)
13751 if (!resolve_typebound_generic (resolve_bindings_derived
, stree
))
13756 /* Get the target-procedure to check it. */
13757 gcc_assert (!stree
->n
.tb
->is_generic
);
13758 gcc_assert (stree
->n
.tb
->u
.specific
);
13759 proc
= stree
->n
.tb
->u
.specific
->n
.sym
;
13760 where
= stree
->n
.tb
->where
;
13762 /* Default access should already be resolved from the parser. */
13763 gcc_assert (stree
->n
.tb
->access
!= ACCESS_UNKNOWN
);
13765 if (stree
->n
.tb
->deferred
)
13767 if (!check_proc_interface (proc
, &where
))
13772 /* If proc has not been resolved at this point, proc->name may
13773 actually be a USE associated entity. See PR fortran/89647. */
13774 if (!proc
->resolved
13775 && proc
->attr
.function
== 0 && proc
->attr
.subroutine
== 0)
13778 gfc_find_symbol (proc
->name
, gfc_current_ns
->parent
, 1, &tmp
);
13779 if (tmp
&& tmp
->attr
.use_assoc
)
13781 proc
->module
= tmp
->module
;
13782 proc
->attr
.proc
= tmp
->attr
.proc
;
13783 proc
->attr
.function
= tmp
->attr
.function
;
13784 proc
->attr
.subroutine
= tmp
->attr
.subroutine
;
13785 proc
->attr
.use_assoc
= tmp
->attr
.use_assoc
;
13786 proc
->ts
= tmp
->ts
;
13787 proc
->result
= tmp
->result
;
13791 /* Check for F08:C465. */
13792 if ((!proc
->attr
.subroutine
&& !proc
->attr
.function
)
13793 || (proc
->attr
.proc
!= PROC_MODULE
13794 && proc
->attr
.if_source
!= IFSRC_IFBODY
)
13795 || proc
->attr
.abstract
)
13797 gfc_error ("%qs must be a module procedure or an external "
13798 "procedure with an explicit interface at %L",
13799 proc
->name
, &where
);
13804 stree
->n
.tb
->subroutine
= proc
->attr
.subroutine
;
13805 stree
->n
.tb
->function
= proc
->attr
.function
;
13807 /* Find the super-type of the current derived type. We could do this once and
13808 store in a global if speed is needed, but as long as not I believe this is
13809 more readable and clearer. */
13810 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13812 /* If PASS, resolve and check arguments if not already resolved / loaded
13813 from a .mod file. */
13814 if (!stree
->n
.tb
->nopass
&& stree
->n
.tb
->pass_arg_num
== 0)
13816 gfc_formal_arglist
*dummy_args
;
13818 dummy_args
= gfc_sym_get_dummy_args (proc
);
13819 if (stree
->n
.tb
->pass_arg
)
13821 gfc_formal_arglist
*i
;
13823 /* If an explicit passing argument name is given, walk the arg-list
13824 and look for it. */
13827 stree
->n
.tb
->pass_arg_num
= 1;
13828 for (i
= dummy_args
; i
; i
= i
->next
)
13830 if (!strcmp (i
->sym
->name
, stree
->n
.tb
->pass_arg
))
13835 ++stree
->n
.tb
->pass_arg_num
;
13840 gfc_error ("Procedure %qs with PASS(%s) at %L has no"
13842 proc
->name
, stree
->n
.tb
->pass_arg
, &where
,
13843 stree
->n
.tb
->pass_arg
);
13849 /* Otherwise, take the first one; there should in fact be at least
13851 stree
->n
.tb
->pass_arg_num
= 1;
13854 gfc_error ("Procedure %qs with PASS at %L must have at"
13855 " least one argument", proc
->name
, &where
);
13858 me_arg
= dummy_args
->sym
;
13861 /* Now check that the argument-type matches and the passed-object
13862 dummy argument is generally fine. */
13864 gcc_assert (me_arg
);
13866 if (me_arg
->ts
.type
!= BT_CLASS
)
13868 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13869 " at %L", proc
->name
, &where
);
13873 if (CLASS_DATA (me_arg
)->ts
.u
.derived
13874 != resolve_bindings_derived
)
13876 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13877 " the derived-type %qs", me_arg
->name
, proc
->name
,
13878 me_arg
->name
, &where
, resolve_bindings_derived
->name
);
13882 gcc_assert (me_arg
->ts
.type
== BT_CLASS
);
13883 if (CLASS_DATA (me_arg
)->as
&& CLASS_DATA (me_arg
)->as
->rank
!= 0)
13885 gfc_error ("Passed-object dummy argument of %qs at %L must be"
13886 " scalar", proc
->name
, &where
);
13889 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13891 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13892 " be ALLOCATABLE", proc
->name
, &where
);
13895 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13897 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13898 " be POINTER", proc
->name
, &where
);
13903 /* If we are extending some type, check that we don't override a procedure
13904 flagged NON_OVERRIDABLE. */
13905 stree
->n
.tb
->overridden
= NULL
;
13908 gfc_symtree
* overridden
;
13909 overridden
= gfc_find_typebound_proc (super_type
, NULL
,
13910 stree
->name
, true, NULL
);
13914 if (overridden
->n
.tb
)
13915 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13917 if (!gfc_check_typebound_override (stree
, overridden
))
13922 /* See if there's a name collision with a component directly in this type. */
13923 for (comp
= resolve_bindings_derived
->components
; comp
; comp
= comp
->next
)
13924 if (!strcmp (comp
->name
, stree
->name
))
13926 gfc_error ("Procedure %qs at %L has the same name as a component of"
13928 stree
->name
, &where
, resolve_bindings_derived
->name
);
13932 /* Try to find a name collision with an inherited component. */
13933 if (super_type
&& gfc_find_component (super_type
, stree
->name
, true, true,
13936 gfc_error ("Procedure %qs at %L has the same name as an inherited"
13937 " component of %qs",
13938 stree
->name
, &where
, resolve_bindings_derived
->name
);
13942 stree
->n
.tb
->error
= 0;
13946 resolve_bindings_result
= false;
13947 stree
->n
.tb
->error
= 1;
13952 resolve_typebound_procedures (gfc_symbol
* derived
)
13955 gfc_symbol
* super_type
;
13957 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->tb_sym_root
)
13960 super_type
= gfc_get_derived_super_type (derived
);
13962 resolve_symbol (super_type
);
13964 resolve_bindings_derived
= derived
;
13965 resolve_bindings_result
= true;
13967 if (derived
->f2k_derived
->tb_sym_root
)
13968 gfc_traverse_symtree (derived
->f2k_derived
->tb_sym_root
,
13969 &resolve_typebound_procedure
);
13971 if (derived
->f2k_derived
->tb_uop_root
)
13972 gfc_traverse_symtree (derived
->f2k_derived
->tb_uop_root
,
13973 &resolve_typebound_user_op
);
13975 for (op
= 0; op
!= GFC_INTRINSIC_OPS
; ++op
)
13977 gfc_typebound_proc
* p
= derived
->f2k_derived
->tb_op
[op
];
13978 if (p
&& !resolve_typebound_intrinsic_op (derived
,
13979 (gfc_intrinsic_op
)op
, p
))
13980 resolve_bindings_result
= false;
13983 return resolve_bindings_result
;
13987 /* Add a derived type to the dt_list. The dt_list is used in trans-types.c
13988 to give all identical derived types the same backend_decl. */
13990 add_dt_to_dt_list (gfc_symbol
*derived
)
13992 if (!derived
->dt_next
)
13994 if (gfc_derived_types
)
13996 derived
->dt_next
= gfc_derived_types
->dt_next
;
13997 gfc_derived_types
->dt_next
= derived
;
14001 derived
->dt_next
= derived
;
14003 gfc_derived_types
= derived
;
14008 /* Ensure that a derived-type is really not abstract, meaning that every
14009 inherited DEFERRED binding is overridden by a non-DEFERRED one. */
14012 ensure_not_abstract_walker (gfc_symbol
* sub
, gfc_symtree
* st
)
14017 if (!ensure_not_abstract_walker (sub
, st
->left
))
14019 if (!ensure_not_abstract_walker (sub
, st
->right
))
14022 if (st
->n
.tb
&& st
->n
.tb
->deferred
)
14024 gfc_symtree
* overriding
;
14025 overriding
= gfc_find_typebound_proc (sub
, NULL
, st
->name
, true, NULL
);
14028 gcc_assert (overriding
->n
.tb
);
14029 if (overriding
->n
.tb
->deferred
)
14031 gfc_error ("Derived-type %qs declared at %L must be ABSTRACT because"
14032 " %qs is DEFERRED and not overridden",
14033 sub
->name
, &sub
->declared_at
, st
->name
);
14042 ensure_not_abstract (gfc_symbol
* sub
, gfc_symbol
* ancestor
)
14044 /* The algorithm used here is to recursively travel up the ancestry of sub
14045 and for each ancestor-type, check all bindings. If any of them is
14046 DEFERRED, look it up starting from sub and see if the found (overriding)
14047 binding is not DEFERRED.
14048 This is not the most efficient way to do this, but it should be ok and is
14049 clearer than something sophisticated. */
14051 gcc_assert (ancestor
&& !sub
->attr
.abstract
);
14053 if (!ancestor
->attr
.abstract
)
14056 /* Walk bindings of this ancestor. */
14057 if (ancestor
->f2k_derived
)
14060 t
= ensure_not_abstract_walker (sub
, ancestor
->f2k_derived
->tb_sym_root
);
14065 /* Find next ancestor type and recurse on it. */
14066 ancestor
= gfc_get_derived_super_type (ancestor
);
14068 return ensure_not_abstract (sub
, ancestor
);
14074 /* This check for typebound defined assignments is done recursively
14075 since the order in which derived types are resolved is not always in
14076 order of the declarations. */
14079 check_defined_assignments (gfc_symbol
*derived
)
14083 for (c
= derived
->components
; c
; c
= c
->next
)
14085 if (!gfc_bt_struct (c
->ts
.type
)
14087 || c
->attr
.allocatable
14088 || c
->attr
.proc_pointer_comp
14089 || c
->attr
.class_pointer
14090 || c
->attr
.proc_pointer
)
14093 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
14094 || (c
->ts
.u
.derived
->f2k_derived
14095 && c
->ts
.u
.derived
->f2k_derived
->tb_op
[INTRINSIC_ASSIGN
]))
14097 derived
->attr
.defined_assign_comp
= 1;
14101 check_defined_assignments (c
->ts
.u
.derived
);
14102 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
14104 derived
->attr
.defined_assign_comp
= 1;
14111 /* Resolve a single component of a derived type or structure. */
14114 resolve_component (gfc_component
*c
, gfc_symbol
*sym
)
14116 gfc_symbol
*super_type
;
14117 symbol_attribute
*attr
;
14119 if (c
->attr
.artificial
)
14122 /* Do not allow vtype components to be resolved in nameless namespaces
14123 such as block data because the procedure pointers will cause ICEs
14124 and vtables are not needed in these contexts. */
14125 if (sym
->attr
.vtype
&& sym
->attr
.use_assoc
14126 && sym
->ns
->proc_name
== NULL
)
14130 if ((!sym
->attr
.is_class
|| c
!= sym
->components
)
14131 && c
->attr
.codimension
14132 && (!c
->attr
.allocatable
|| (c
->as
&& c
->as
->type
!= AS_DEFERRED
)))
14134 gfc_error ("Coarray component %qs at %L must be allocatable with "
14135 "deferred shape", c
->name
, &c
->loc
);
14140 if (c
->attr
.codimension
&& c
->ts
.type
== BT_DERIVED
14141 && c
->ts
.u
.derived
->ts
.is_iso_c
)
14143 gfc_error ("Component %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
14144 "shall not be a coarray", c
->name
, &c
->loc
);
14149 if (gfc_bt_struct (c
->ts
.type
) && c
->ts
.u
.derived
->attr
.coarray_comp
14150 && (c
->attr
.codimension
|| c
->attr
.pointer
|| c
->attr
.dimension
14151 || c
->attr
.allocatable
))
14153 gfc_error ("Component %qs at %L with coarray component "
14154 "shall be a nonpointer, nonallocatable scalar",
14160 if (c
->ts
.type
== BT_CLASS
)
14162 if (CLASS_DATA (c
))
14164 attr
= &(CLASS_DATA (c
)->attr
);
14166 /* Fix up contiguous attribute. */
14167 if (c
->attr
.contiguous
)
14168 attr
->contiguous
= 1;
14176 if (attr
&& attr
->contiguous
&& (!attr
->dimension
|| !attr
->pointer
))
14178 gfc_error ("Component %qs at %L has the CONTIGUOUS attribute but "
14179 "is not an array pointer", c
->name
, &c
->loc
);
14183 /* F2003, 15.2.1 - length has to be one. */
14184 if (sym
->attr
.is_bind_c
&& c
->ts
.type
== BT_CHARACTER
14185 && (c
->ts
.u
.cl
== NULL
|| c
->ts
.u
.cl
->length
== NULL
14186 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
)
14187 || mpz_cmp_si (c
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
14189 gfc_error ("Component %qs of BIND(C) type at %L must have length one",
14194 if (c
->attr
.proc_pointer
&& c
->ts
.interface
)
14196 gfc_symbol
*ifc
= c
->ts
.interface
;
14198 if (!sym
->attr
.vtype
&& !check_proc_interface (ifc
, &c
->loc
))
14204 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
14206 /* Resolve interface and copy attributes. */
14207 if (ifc
->formal
&& !ifc
->formal_ns
)
14208 resolve_symbol (ifc
);
14209 if (ifc
->attr
.intrinsic
)
14210 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
14214 c
->ts
= ifc
->result
->ts
;
14215 c
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
14216 c
->attr
.pointer
= ifc
->result
->attr
.pointer
;
14217 c
->attr
.dimension
= ifc
->result
->attr
.dimension
;
14218 c
->as
= gfc_copy_array_spec (ifc
->result
->as
);
14219 c
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
14224 c
->attr
.allocatable
= ifc
->attr
.allocatable
;
14225 c
->attr
.pointer
= ifc
->attr
.pointer
;
14226 c
->attr
.dimension
= ifc
->attr
.dimension
;
14227 c
->as
= gfc_copy_array_spec (ifc
->as
);
14228 c
->attr
.class_ok
= ifc
->attr
.class_ok
;
14230 c
->ts
.interface
= ifc
;
14231 c
->attr
.function
= ifc
->attr
.function
;
14232 c
->attr
.subroutine
= ifc
->attr
.subroutine
;
14234 c
->attr
.pure
= ifc
->attr
.pure
;
14235 c
->attr
.elemental
= ifc
->attr
.elemental
;
14236 c
->attr
.recursive
= ifc
->attr
.recursive
;
14237 c
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
14238 c
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
14239 /* Copy char length. */
14240 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
14242 gfc_charlen
*cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
14243 if (cl
->length
&& !cl
->resolved
14244 && !gfc_resolve_expr (cl
->length
))
14253 else if (c
->attr
.proc_pointer
&& c
->ts
.type
== BT_UNKNOWN
)
14255 /* Since PPCs are not implicitly typed, a PPC without an explicit
14256 interface must be a subroutine. */
14257 gfc_add_subroutine (&c
->attr
, c
->name
, &c
->loc
);
14260 /* Procedure pointer components: Check PASS arg. */
14261 if (c
->attr
.proc_pointer
&& !c
->tb
->nopass
&& c
->tb
->pass_arg_num
== 0
14262 && !sym
->attr
.vtype
)
14264 gfc_symbol
* me_arg
;
14266 if (c
->tb
->pass_arg
)
14268 gfc_formal_arglist
* i
;
14270 /* If an explicit passing argument name is given, walk the arg-list
14271 and look for it. */
14274 c
->tb
->pass_arg_num
= 1;
14275 for (i
= c
->ts
.interface
->formal
; i
; i
= i
->next
)
14277 if (!strcmp (i
->sym
->name
, c
->tb
->pass_arg
))
14282 c
->tb
->pass_arg_num
++;
14287 gfc_error ("Procedure pointer component %qs with PASS(%s) "
14288 "at %L has no argument %qs", c
->name
,
14289 c
->tb
->pass_arg
, &c
->loc
, c
->tb
->pass_arg
);
14296 /* Otherwise, take the first one; there should in fact be at least
14298 c
->tb
->pass_arg_num
= 1;
14299 if (!c
->ts
.interface
->formal
)
14301 gfc_error ("Procedure pointer component %qs with PASS at %L "
14302 "must have at least one argument",
14307 me_arg
= c
->ts
.interface
->formal
->sym
;
14310 /* Now check that the argument-type matches. */
14311 gcc_assert (me_arg
);
14312 if ((me_arg
->ts
.type
!= BT_DERIVED
&& me_arg
->ts
.type
!= BT_CLASS
)
14313 || (me_arg
->ts
.type
== BT_DERIVED
&& me_arg
->ts
.u
.derived
!= sym
)
14314 || (me_arg
->ts
.type
== BT_CLASS
14315 && CLASS_DATA (me_arg
)->ts
.u
.derived
!= sym
))
14317 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
14318 " the derived type %qs", me_arg
->name
, c
->name
,
14319 me_arg
->name
, &c
->loc
, sym
->name
);
14324 /* Check for F03:C453. */
14325 if (CLASS_DATA (me_arg
)->attr
.dimension
)
14327 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14328 "must be scalar", me_arg
->name
, c
->name
, me_arg
->name
,
14334 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
14336 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14337 "may not have the POINTER attribute", me_arg
->name
,
14338 c
->name
, me_arg
->name
, &c
->loc
);
14343 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
14345 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14346 "may not be ALLOCATABLE", me_arg
->name
, c
->name
,
14347 me_arg
->name
, &c
->loc
);
14352 if (gfc_type_is_extensible (sym
) && me_arg
->ts
.type
!= BT_CLASS
)
14354 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
14355 " at %L", c
->name
, &c
->loc
);
14361 /* Check type-spec if this is not the parent-type component. */
14362 if (((sym
->attr
.is_class
14363 && (!sym
->components
->ts
.u
.derived
->attr
.extension
14364 || c
!= sym
->components
->ts
.u
.derived
->components
))
14365 || (!sym
->attr
.is_class
14366 && (!sym
->attr
.extension
|| c
!= sym
->components
)))
14367 && !sym
->attr
.vtype
14368 && !resolve_typespec_used (&c
->ts
, &c
->loc
, c
->name
))
14371 super_type
= gfc_get_derived_super_type (sym
);
14373 /* If this type is an extension, set the accessibility of the parent
14376 && ((sym
->attr
.is_class
14377 && c
== sym
->components
->ts
.u
.derived
->components
)
14378 || (!sym
->attr
.is_class
&& c
== sym
->components
))
14379 && strcmp (super_type
->name
, c
->name
) == 0)
14380 c
->attr
.access
= super_type
->attr
.access
;
14382 /* If this type is an extension, see if this component has the same name
14383 as an inherited type-bound procedure. */
14384 if (super_type
&& !sym
->attr
.is_class
14385 && gfc_find_typebound_proc (super_type
, NULL
, c
->name
, true, NULL
))
14387 gfc_error ("Component %qs of %qs at %L has the same name as an"
14388 " inherited type-bound procedure",
14389 c
->name
, sym
->name
, &c
->loc
);
14393 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.proc_pointer
14394 && !c
->ts
.deferred
)
14396 if (c
->ts
.u
.cl
->length
== NULL
14397 || (!resolve_charlen(c
->ts
.u
.cl
))
14398 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
))
14400 gfc_error ("Character length of component %qs needs to "
14401 "be a constant specification expression at %L",
14403 c
->ts
.u
.cl
->length
? &c
->ts
.u
.cl
->length
->where
: &c
->loc
);
14408 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.deferred
14409 && !c
->attr
.pointer
&& !c
->attr
.allocatable
)
14411 gfc_error ("Character component %qs of %qs at %L with deferred "
14412 "length must be a POINTER or ALLOCATABLE",
14413 c
->name
, sym
->name
, &c
->loc
);
14417 /* Add the hidden deferred length field. */
14418 if (c
->ts
.type
== BT_CHARACTER
14419 && (c
->ts
.deferred
|| c
->attr
.pdt_string
)
14420 && !c
->attr
.function
14421 && !sym
->attr
.is_class
)
14423 char name
[GFC_MAX_SYMBOL_LEN
+9];
14424 gfc_component
*strlen
;
14425 sprintf (name
, "_%s_length", c
->name
);
14426 strlen
= gfc_find_component (sym
, name
, true, true, NULL
);
14427 if (strlen
== NULL
)
14429 if (!gfc_add_component (sym
, name
, &strlen
))
14431 strlen
->ts
.type
= BT_INTEGER
;
14432 strlen
->ts
.kind
= gfc_charlen_int_kind
;
14433 strlen
->attr
.access
= ACCESS_PRIVATE
;
14434 strlen
->attr
.artificial
= 1;
14438 if (c
->ts
.type
== BT_DERIVED
14439 && sym
->component_access
!= ACCESS_PRIVATE
14440 && gfc_check_symbol_access (sym
)
14441 && !is_sym_host_assoc (c
->ts
.u
.derived
, sym
->ns
)
14442 && !c
->ts
.u
.derived
->attr
.use_assoc
14443 && !gfc_check_symbol_access (c
->ts
.u
.derived
)
14444 && !gfc_notify_std (GFC_STD_F2003
, "the component %qs is a "
14445 "PRIVATE type and cannot be a component of "
14446 "%qs, which is PUBLIC at %L", c
->name
,
14447 sym
->name
, &sym
->declared_at
))
14450 if ((sym
->attr
.sequence
|| sym
->attr
.is_bind_c
) && c
->ts
.type
== BT_CLASS
)
14452 gfc_error ("Polymorphic component %s at %L in SEQUENCE or BIND(C) "
14453 "type %s", c
->name
, &c
->loc
, sym
->name
);
14457 if (sym
->attr
.sequence
)
14459 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.sequence
== 0)
14461 gfc_error ("Component %s of SEQUENCE type declared at %L does "
14462 "not have the SEQUENCE attribute",
14463 c
->ts
.u
.derived
->name
, &sym
->declared_at
);
14468 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.generic
)
14469 c
->ts
.u
.derived
= gfc_find_dt_in_generic (c
->ts
.u
.derived
);
14470 else if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
14471 && CLASS_DATA (c
)->ts
.u
.derived
->attr
.generic
)
14472 CLASS_DATA (c
)->ts
.u
.derived
14473 = gfc_find_dt_in_generic (CLASS_DATA (c
)->ts
.u
.derived
);
14475 /* If an allocatable component derived type is of the same type as
14476 the enclosing derived type, we need a vtable generating so that
14477 the __deallocate procedure is created. */
14478 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
14479 && c
->ts
.u
.derived
== sym
&& c
->attr
.allocatable
== 1)
14480 gfc_find_vtab (&c
->ts
);
14482 /* Ensure that all the derived type components are put on the
14483 derived type list; even in formal namespaces, where derived type
14484 pointer components might not have been declared. */
14485 if (c
->ts
.type
== BT_DERIVED
14487 && c
->ts
.u
.derived
->components
14489 && sym
!= c
->ts
.u
.derived
)
14490 add_dt_to_dt_list (c
->ts
.u
.derived
);
14492 if (!gfc_resolve_array_spec (c
->as
,
14493 !(c
->attr
.pointer
|| c
->attr
.proc_pointer
14494 || c
->attr
.allocatable
)))
14497 if (c
->initializer
&& !sym
->attr
.vtype
14498 && !c
->attr
.pdt_kind
&& !c
->attr
.pdt_len
14499 && !gfc_check_assign_symbol (sym
, c
, c
->initializer
))
14506 /* Be nice about the locus for a structure expression - show the locus of the
14507 first non-null sub-expression if we can. */
14510 cons_where (gfc_expr
*struct_expr
)
14512 gfc_constructor
*cons
;
14514 gcc_assert (struct_expr
&& struct_expr
->expr_type
== EXPR_STRUCTURE
);
14516 cons
= gfc_constructor_first (struct_expr
->value
.constructor
);
14517 for (; cons
; cons
= gfc_constructor_next (cons
))
14519 if (cons
->expr
&& cons
->expr
->expr_type
!= EXPR_NULL
)
14520 return &cons
->expr
->where
;
14523 return &struct_expr
->where
;
14526 /* Resolve the components of a structure type. Much less work than derived
14530 resolve_fl_struct (gfc_symbol
*sym
)
14533 gfc_expr
*init
= NULL
;
14536 /* Make sure UNIONs do not have overlapping initializers. */
14537 if (sym
->attr
.flavor
== FL_UNION
)
14539 for (c
= sym
->components
; c
; c
= c
->next
)
14541 if (init
&& c
->initializer
)
14543 gfc_error ("Conflicting initializers in union at %L and %L",
14544 cons_where (init
), cons_where (c
->initializer
));
14545 gfc_free_expr (c
->initializer
);
14546 c
->initializer
= NULL
;
14549 init
= c
->initializer
;
14554 for (c
= sym
->components
; c
; c
= c
->next
)
14555 if (!resolve_component (c
, sym
))
14561 if (sym
->components
)
14562 add_dt_to_dt_list (sym
);
14568 /* Resolve the components of a derived type. This does not have to wait until
14569 resolution stage, but can be done as soon as the dt declaration has been
14573 resolve_fl_derived0 (gfc_symbol
*sym
)
14575 gfc_symbol
* super_type
;
14577 gfc_formal_arglist
*f
;
14580 if (sym
->attr
.unlimited_polymorphic
)
14583 super_type
= gfc_get_derived_super_type (sym
);
14586 if (super_type
&& sym
->attr
.coarray_comp
&& !super_type
->attr
.coarray_comp
)
14588 gfc_error ("As extending type %qs at %L has a coarray component, "
14589 "parent type %qs shall also have one", sym
->name
,
14590 &sym
->declared_at
, super_type
->name
);
14594 /* Ensure the extended type gets resolved before we do. */
14595 if (super_type
&& !resolve_fl_derived0 (super_type
))
14598 /* An ABSTRACT type must be extensible. */
14599 if (sym
->attr
.abstract
&& !gfc_type_is_extensible (sym
))
14601 gfc_error ("Non-extensible derived-type %qs at %L must not be ABSTRACT",
14602 sym
->name
, &sym
->declared_at
);
14606 c
= (sym
->attr
.is_class
) ? sym
->components
->ts
.u
.derived
->components
14610 for ( ; c
!= NULL
; c
= c
->next
)
14611 if (!resolve_component (c
, sym
))
14617 /* Now add the caf token field, where needed. */
14618 if (flag_coarray
!= GFC_FCOARRAY_NONE
14619 && !sym
->attr
.is_class
&& !sym
->attr
.vtype
)
14621 for (c
= sym
->components
; c
; c
= c
->next
)
14622 if (!c
->attr
.dimension
&& !c
->attr
.codimension
14623 && (c
->attr
.allocatable
|| c
->attr
.pointer
))
14625 char name
[GFC_MAX_SYMBOL_LEN
+9];
14626 gfc_component
*token
;
14627 sprintf (name
, "_caf_%s", c
->name
);
14628 token
= gfc_find_component (sym
, name
, true, true, NULL
);
14631 if (!gfc_add_component (sym
, name
, &token
))
14633 token
->ts
.type
= BT_VOID
;
14634 token
->ts
.kind
= gfc_default_integer_kind
;
14635 token
->attr
.access
= ACCESS_PRIVATE
;
14636 token
->attr
.artificial
= 1;
14637 token
->attr
.caf_token
= 1;
14642 check_defined_assignments (sym
);
14644 if (!sym
->attr
.defined_assign_comp
&& super_type
)
14645 sym
->attr
.defined_assign_comp
14646 = super_type
->attr
.defined_assign_comp
;
14648 /* If this is a non-ABSTRACT type extending an ABSTRACT one, ensure that
14649 all DEFERRED bindings are overridden. */
14650 if (super_type
&& super_type
->attr
.abstract
&& !sym
->attr
.abstract
14651 && !sym
->attr
.is_class
14652 && !ensure_not_abstract (sym
, super_type
))
14655 /* Check that there is a component for every PDT parameter. */
14656 if (sym
->attr
.pdt_template
)
14658 for (f
= sym
->formal
; f
; f
= f
->next
)
14662 c
= gfc_find_component (sym
, f
->sym
->name
, true, true, NULL
);
14665 gfc_error ("Parameterized type %qs does not have a component "
14666 "corresponding to parameter %qs at %L", sym
->name
,
14667 f
->sym
->name
, &sym
->declared_at
);
14673 /* Add derived type to the derived type list. */
14674 add_dt_to_dt_list (sym
);
14680 /* The following procedure does the full resolution of a derived type,
14681 including resolution of all type-bound procedures (if present). In contrast
14682 to 'resolve_fl_derived0' this can only be done after the module has been
14683 parsed completely. */
14686 resolve_fl_derived (gfc_symbol
*sym
)
14688 gfc_symbol
*gen_dt
= NULL
;
14690 if (sym
->attr
.unlimited_polymorphic
)
14693 if (!sym
->attr
.is_class
)
14694 gfc_find_symbol (sym
->name
, sym
->ns
, 0, &gen_dt
);
14695 if (gen_dt
&& gen_dt
->generic
&& gen_dt
->generic
->next
14696 && (!gen_dt
->generic
->sym
->attr
.use_assoc
14697 || gen_dt
->generic
->sym
->module
!= gen_dt
->generic
->next
->sym
->module
)
14698 && !gfc_notify_std (GFC_STD_F2003
, "Generic name %qs of function "
14699 "%qs at %L being the same name as derived "
14700 "type at %L", sym
->name
,
14701 gen_dt
->generic
->sym
== sym
14702 ? gen_dt
->generic
->next
->sym
->name
14703 : gen_dt
->generic
->sym
->name
,
14704 gen_dt
->generic
->sym
== sym
14705 ? &gen_dt
->generic
->next
->sym
->declared_at
14706 : &gen_dt
->generic
->sym
->declared_at
,
14707 &sym
->declared_at
))
14710 if (sym
->components
== NULL
&& !sym
->attr
.zero_comp
&& !sym
->attr
.use_assoc
)
14712 gfc_error ("Derived type %qs at %L has not been declared",
14713 sym
->name
, &sym
->declared_at
);
14717 /* Resolve the finalizer procedures. */
14718 if (!gfc_resolve_finalizers (sym
, NULL
))
14721 if (sym
->attr
.is_class
&& sym
->ts
.u
.derived
== NULL
)
14723 /* Fix up incomplete CLASS symbols. */
14724 gfc_component
*data
= gfc_find_component (sym
, "_data", true, true, NULL
);
14725 gfc_component
*vptr
= gfc_find_component (sym
, "_vptr", true, true, NULL
);
14727 /* Nothing more to do for unlimited polymorphic entities. */
14728 if (data
->ts
.u
.derived
->attr
.unlimited_polymorphic
)
14730 else if (vptr
->ts
.u
.derived
== NULL
)
14732 gfc_symbol
*vtab
= gfc_find_derived_vtab (data
->ts
.u
.derived
);
14734 vptr
->ts
.u
.derived
= vtab
->ts
.u
.derived
;
14735 if (!resolve_fl_derived0 (vptr
->ts
.u
.derived
))
14740 if (!resolve_fl_derived0 (sym
))
14743 /* Resolve the type-bound procedures. */
14744 if (!resolve_typebound_procedures (sym
))
14747 /* Generate module vtables subject to their accessibility and their not
14748 being vtables or pdt templates. If this is not done class declarations
14749 in external procedures wind up with their own version and so SELECT TYPE
14750 fails because the vptrs do not have the same address. */
14751 if (gfc_option
.allow_std
& GFC_STD_F2003
14752 && sym
->ns
->proc_name
14753 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14754 && sym
->attr
.access
!= ACCESS_PRIVATE
14755 && !(sym
->attr
.use_assoc
|| sym
->attr
.vtype
|| sym
->attr
.pdt_template
))
14757 gfc_symbol
*vtab
= gfc_find_derived_vtab (sym
);
14758 gfc_set_sym_referenced (vtab
);
14766 resolve_fl_namelist (gfc_symbol
*sym
)
14771 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14773 /* Check again, the check in match only works if NAMELIST comes
14775 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SIZE
)
14777 gfc_error ("Assumed size array %qs in namelist %qs at %L is not "
14778 "allowed", nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14782 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SHAPE
14783 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14784 "with assumed shape in namelist %qs at %L",
14785 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14788 if (is_non_constant_shape_array (nl
->sym
)
14789 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14790 "with nonconstant shape in namelist %qs at %L",
14791 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14794 if (nl
->sym
->ts
.type
== BT_CHARACTER
14795 && (nl
->sym
->ts
.u
.cl
->length
== NULL
14796 || !gfc_is_constant_expr (nl
->sym
->ts
.u
.cl
->length
))
14797 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs with "
14798 "nonconstant character length in "
14799 "namelist %qs at %L", nl
->sym
->name
,
14800 sym
->name
, &sym
->declared_at
))
14805 /* Reject PRIVATE objects in a PUBLIC namelist. */
14806 if (gfc_check_symbol_access (sym
))
14808 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14810 if (!nl
->sym
->attr
.use_assoc
14811 && !is_sym_host_assoc (nl
->sym
, sym
->ns
)
14812 && !gfc_check_symbol_access (nl
->sym
))
14814 gfc_error ("NAMELIST object %qs was declared PRIVATE and "
14815 "cannot be member of PUBLIC namelist %qs at %L",
14816 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14820 if (nl
->sym
->ts
.type
== BT_DERIVED
14821 && (nl
->sym
->ts
.u
.derived
->attr
.alloc_comp
14822 || nl
->sym
->ts
.u
.derived
->attr
.pointer_comp
))
14824 if (!gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs in "
14825 "namelist %qs at %L with ALLOCATABLE "
14826 "or POINTER components", nl
->sym
->name
,
14827 sym
->name
, &sym
->declared_at
))
14832 /* Types with private components that came here by USE-association. */
14833 if (nl
->sym
->ts
.type
== BT_DERIVED
14834 && derived_inaccessible (nl
->sym
->ts
.u
.derived
))
14836 gfc_error ("NAMELIST object %qs has use-associated PRIVATE "
14837 "components and cannot be member of namelist %qs at %L",
14838 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14842 /* Types with private components that are defined in the same module. */
14843 if (nl
->sym
->ts
.type
== BT_DERIVED
14844 && !is_sym_host_assoc (nl
->sym
->ts
.u
.derived
, sym
->ns
)
14845 && nl
->sym
->ts
.u
.derived
->attr
.private_comp
)
14847 gfc_error ("NAMELIST object %qs has PRIVATE components and "
14848 "cannot be a member of PUBLIC namelist %qs at %L",
14849 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14856 /* 14.1.2 A module or internal procedure represent local entities
14857 of the same type as a namelist member and so are not allowed. */
14858 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14860 if (nl
->sym
->ts
.kind
!= 0 && nl
->sym
->attr
.flavor
== FL_VARIABLE
)
14863 if (nl
->sym
->attr
.function
&& nl
->sym
== nl
->sym
->result
)
14864 if ((nl
->sym
== sym
->ns
->proc_name
)
14866 (sym
->ns
->parent
&& nl
->sym
== sym
->ns
->parent
->proc_name
))
14871 gfc_find_symbol (nl
->sym
->name
, sym
->ns
, 1, &nlsym
);
14872 if (nlsym
&& nlsym
->attr
.flavor
== FL_PROCEDURE
)
14874 gfc_error ("PROCEDURE attribute conflicts with NAMELIST "
14875 "attribute in %qs at %L", nlsym
->name
,
14876 &sym
->declared_at
);
14883 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14884 nl
->sym
->attr
.asynchronous
= 1;
14891 resolve_fl_parameter (gfc_symbol
*sym
)
14893 /* A parameter array's shape needs to be constant. */
14894 if (sym
->as
!= NULL
14895 && (sym
->as
->type
== AS_DEFERRED
14896 || is_non_constant_shape_array (sym
)))
14898 gfc_error ("Parameter array %qs at %L cannot be automatic "
14899 "or of deferred shape", sym
->name
, &sym
->declared_at
);
14903 /* Constraints on deferred type parameter. */
14904 if (!deferred_requirements (sym
))
14907 /* Make sure a parameter that has been implicitly typed still
14908 matches the implicit type, since PARAMETER statements can precede
14909 IMPLICIT statements. */
14910 if (sym
->attr
.implicit_type
14911 && !gfc_compare_types (&sym
->ts
, gfc_get_default_type (sym
->name
,
14914 gfc_error ("Implicitly typed PARAMETER %qs at %L doesn't match a "
14915 "later IMPLICIT type", sym
->name
, &sym
->declared_at
);
14919 /* Make sure the types of derived parameters are consistent. This
14920 type checking is deferred until resolution because the type may
14921 refer to a derived type from the host. */
14922 if (sym
->ts
.type
== BT_DERIVED
14923 && !gfc_compare_types (&sym
->ts
, &sym
->value
->ts
))
14925 gfc_error ("Incompatible derived type in PARAMETER at %L",
14926 &sym
->value
->where
);
14930 /* F03:C509,C514. */
14931 if (sym
->ts
.type
== BT_CLASS
)
14933 gfc_error ("CLASS variable %qs at %L cannot have the PARAMETER attribute",
14934 sym
->name
, &sym
->declared_at
);
14942 /* Called by resolve_symbol to check PDTs. */
14945 resolve_pdt (gfc_symbol
* sym
)
14947 gfc_symbol
*derived
= NULL
;
14948 gfc_actual_arglist
*param
;
14950 bool const_len_exprs
= true;
14951 bool assumed_len_exprs
= false;
14952 symbol_attribute
*attr
;
14954 if (sym
->ts
.type
== BT_DERIVED
)
14956 derived
= sym
->ts
.u
.derived
;
14957 attr
= &(sym
->attr
);
14959 else if (sym
->ts
.type
== BT_CLASS
)
14961 derived
= CLASS_DATA (sym
)->ts
.u
.derived
;
14962 attr
= &(CLASS_DATA (sym
)->attr
);
14965 gcc_unreachable ();
14967 gcc_assert (derived
->attr
.pdt_type
);
14969 for (param
= sym
->param_list
; param
; param
= param
->next
)
14971 c
= gfc_find_component (derived
, param
->name
, false, true, NULL
);
14973 if (c
->attr
.pdt_kind
)
14976 if (param
->expr
&& !gfc_is_constant_expr (param
->expr
)
14977 && c
->attr
.pdt_len
)
14978 const_len_exprs
= false;
14979 else if (param
->spec_type
== SPEC_ASSUMED
)
14980 assumed_len_exprs
= true;
14982 if (param
->spec_type
== SPEC_DEFERRED
14983 && !attr
->allocatable
&& !attr
->pointer
)
14984 gfc_error ("The object %qs at %L has a deferred LEN "
14985 "parameter %qs and is neither allocatable "
14986 "nor a pointer", sym
->name
, &sym
->declared_at
,
14991 if (!const_len_exprs
14992 && (sym
->ns
->proc_name
->attr
.is_main_program
14993 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14994 || sym
->attr
.save
!= SAVE_NONE
))
14995 gfc_error ("The AUTOMATIC object %qs at %L must not have the "
14996 "SAVE attribute or be a variable declared in the "
14997 "main program, a module or a submodule(F08/C513)",
14998 sym
->name
, &sym
->declared_at
);
15000 if (assumed_len_exprs
&& !(sym
->attr
.dummy
15001 || sym
->attr
.select_type_temporary
|| sym
->attr
.associate_var
))
15002 gfc_error ("The object %qs at %L with ASSUMED type parameters "
15003 "must be a dummy or a SELECT TYPE selector(F08/4.2)",
15004 sym
->name
, &sym
->declared_at
);
15008 /* Do anything necessary to resolve a symbol. Right now, we just
15009 assume that an otherwise unknown symbol is a variable. This sort
15010 of thing commonly happens for symbols in module. */
15013 resolve_symbol (gfc_symbol
*sym
)
15015 int check_constant
, mp_flag
;
15016 gfc_symtree
*symtree
;
15017 gfc_symtree
*this_symtree
;
15020 symbol_attribute class_attr
;
15021 gfc_array_spec
*as
;
15022 bool saved_specification_expr
;
15028 /* No symbol will ever have union type; only components can be unions.
15029 Union type declaration symbols have type BT_UNKNOWN but flavor FL_UNION
15030 (just like derived type declaration symbols have flavor FL_DERIVED). */
15031 gcc_assert (sym
->ts
.type
!= BT_UNION
);
15033 /* Coarrayed polymorphic objects with allocatable or pointer components are
15034 yet unsupported for -fcoarray=lib. */
15035 if (flag_coarray
== GFC_FCOARRAY_LIB
&& sym
->ts
.type
== BT_CLASS
15036 && sym
->ts
.u
.derived
&& CLASS_DATA (sym
)
15037 && CLASS_DATA (sym
)->attr
.codimension
15038 && (CLASS_DATA (sym
)->ts
.u
.derived
->attr
.alloc_comp
15039 || CLASS_DATA (sym
)->ts
.u
.derived
->attr
.pointer_comp
))
15041 gfc_error ("Sorry, allocatable/pointer components in polymorphic (CLASS) "
15042 "type coarrays at %L are unsupported", &sym
->declared_at
);
15046 if (sym
->attr
.artificial
)
15049 if (sym
->attr
.unlimited_polymorphic
)
15052 if (sym
->attr
.flavor
== FL_UNKNOWN
15053 || (sym
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.intrinsic
15054 && !sym
->attr
.generic
&& !sym
->attr
.external
15055 && sym
->attr
.if_source
== IFSRC_UNKNOWN
15056 && sym
->ts
.type
== BT_UNKNOWN
))
15059 /* If we find that a flavorless symbol is an interface in one of the
15060 parent namespaces, find its symtree in this namespace, free the
15061 symbol and set the symtree to point to the interface symbol. */
15062 for (ns
= gfc_current_ns
->parent
; ns
; ns
= ns
->parent
)
15064 symtree
= gfc_find_symtree (ns
->sym_root
, sym
->name
);
15065 if (symtree
&& (symtree
->n
.sym
->generic
||
15066 (symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
15067 && sym
->ns
->construct_entities
)))
15069 this_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
15071 if (this_symtree
->n
.sym
== sym
)
15073 symtree
->n
.sym
->refs
++;
15074 gfc_release_symbol (sym
);
15075 this_symtree
->n
.sym
= symtree
->n
.sym
;
15081 /* Otherwise give it a flavor according to such attributes as
15083 if (sym
->attr
.flavor
== FL_UNKNOWN
&& sym
->attr
.external
== 0
15084 && sym
->attr
.intrinsic
== 0)
15085 sym
->attr
.flavor
= FL_VARIABLE
;
15086 else if (sym
->attr
.flavor
== FL_UNKNOWN
)
15088 sym
->attr
.flavor
= FL_PROCEDURE
;
15089 if (sym
->attr
.dimension
)
15090 sym
->attr
.function
= 1;
15094 if (sym
->attr
.external
&& sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.function
)
15095 gfc_add_function (&sym
->attr
, sym
->name
, &sym
->declared_at
);
15097 if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
15098 && !resolve_procedure_interface (sym
))
15101 if (sym
->attr
.is_protected
&& !sym
->attr
.proc_pointer
15102 && (sym
->attr
.procedure
|| sym
->attr
.external
))
15104 if (sym
->attr
.external
)
15105 gfc_error ("PROTECTED attribute conflicts with EXTERNAL attribute "
15106 "at %L", &sym
->declared_at
);
15108 gfc_error ("PROCEDURE attribute conflicts with PROTECTED attribute "
15109 "at %L", &sym
->declared_at
);
15114 if (sym
->attr
.flavor
== FL_DERIVED
&& !resolve_fl_derived (sym
))
15117 else if ((sym
->attr
.flavor
== FL_STRUCT
|| sym
->attr
.flavor
== FL_UNION
)
15118 && !resolve_fl_struct (sym
))
15121 /* Symbols that are module procedures with results (functions) have
15122 the types and array specification copied for type checking in
15123 procedures that call them, as well as for saving to a module
15124 file. These symbols can't stand the scrutiny that their results
15126 mp_flag
= (sym
->result
!= NULL
&& sym
->result
!= sym
);
15128 /* Make sure that the intrinsic is consistent with its internal
15129 representation. This needs to be done before assigning a default
15130 type to avoid spurious warnings. */
15131 if (sym
->attr
.flavor
!= FL_MODULE
&& sym
->attr
.intrinsic
15132 && !gfc_resolve_intrinsic (sym
, &sym
->declared_at
))
15135 /* Resolve associate names. */
15137 resolve_assoc_var (sym
, true);
15139 /* Assign default type to symbols that need one and don't have one. */
15140 if (sym
->ts
.type
== BT_UNKNOWN
)
15142 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
)
15144 gfc_set_default_type (sym
, 1, NULL
);
15147 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.external
15148 && !sym
->attr
.function
&& !sym
->attr
.subroutine
15149 && gfc_get_default_type (sym
->name
, sym
->ns
)->type
== BT_UNKNOWN
)
15150 gfc_add_subroutine (&sym
->attr
, sym
->name
, &sym
->declared_at
);
15152 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
15154 /* The specific case of an external procedure should emit an error
15155 in the case that there is no implicit type. */
15158 if (!sym
->attr
.mixed_entry_master
)
15159 gfc_set_default_type (sym
, sym
->attr
.external
, NULL
);
15163 /* Result may be in another namespace. */
15164 resolve_symbol (sym
->result
);
15166 if (!sym
->result
->attr
.proc_pointer
)
15168 sym
->ts
= sym
->result
->ts
;
15169 sym
->as
= gfc_copy_array_spec (sym
->result
->as
);
15170 sym
->attr
.dimension
= sym
->result
->attr
.dimension
;
15171 sym
->attr
.pointer
= sym
->result
->attr
.pointer
;
15172 sym
->attr
.allocatable
= sym
->result
->attr
.allocatable
;
15173 sym
->attr
.contiguous
= sym
->result
->attr
.contiguous
;
15178 else if (mp_flag
&& sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
15180 bool saved_specification_expr
= specification_expr
;
15181 specification_expr
= true;
15182 gfc_resolve_array_spec (sym
->result
->as
, false);
15183 specification_expr
= saved_specification_expr
;
15186 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
15188 as
= CLASS_DATA (sym
)->as
;
15189 class_attr
= CLASS_DATA (sym
)->attr
;
15190 class_attr
.pointer
= class_attr
.class_pointer
;
15194 class_attr
= sym
->attr
;
15199 if (sym
->attr
.contiguous
15200 && (!class_attr
.dimension
15201 || (as
->type
!= AS_ASSUMED_SHAPE
&& as
->type
!= AS_ASSUMED_RANK
15202 && !class_attr
.pointer
)))
15204 gfc_error ("%qs at %L has the CONTIGUOUS attribute but is not an "
15205 "array pointer or an assumed-shape or assumed-rank array",
15206 sym
->name
, &sym
->declared_at
);
15210 /* Assumed size arrays and assumed shape arrays must be dummy
15211 arguments. Array-spec's of implied-shape should have been resolved to
15212 AS_EXPLICIT already. */
15216 /* If AS_IMPLIED_SHAPE makes it to here, it must be a bad
15217 specification expression. */
15218 if (as
->type
== AS_IMPLIED_SHAPE
)
15221 for (i
=0; i
<as
->rank
; i
++)
15223 if (as
->lower
[i
] != NULL
&& as
->upper
[i
] == NULL
)
15225 gfc_error ("Bad specification for assumed size array at %L",
15226 &as
->lower
[i
]->where
);
15233 if (((as
->type
== AS_ASSUMED_SIZE
&& !as
->cp_was_assumed
)
15234 || as
->type
== AS_ASSUMED_SHAPE
)
15235 && !sym
->attr
.dummy
&& !sym
->attr
.select_type_temporary
)
15237 if (as
->type
== AS_ASSUMED_SIZE
)
15238 gfc_error ("Assumed size array at %L must be a dummy argument",
15239 &sym
->declared_at
);
15241 gfc_error ("Assumed shape array at %L must be a dummy argument",
15242 &sym
->declared_at
);
15245 /* TS 29113, C535a. */
15246 if (as
->type
== AS_ASSUMED_RANK
&& !sym
->attr
.dummy
15247 && !sym
->attr
.select_type_temporary
15248 && !(cs_base
&& cs_base
->current
15249 && cs_base
->current
->op
== EXEC_SELECT_RANK
))
15251 gfc_error ("Assumed-rank array at %L must be a dummy argument",
15252 &sym
->declared_at
);
15255 if (as
->type
== AS_ASSUMED_RANK
15256 && (sym
->attr
.codimension
|| sym
->attr
.value
))
15258 gfc_error ("Assumed-rank array at %L may not have the VALUE or "
15259 "CODIMENSION attribute", &sym
->declared_at
);
15264 /* Make sure symbols with known intent or optional are really dummy
15265 variable. Because of ENTRY statement, this has to be deferred
15266 until resolution time. */
15268 if (!sym
->attr
.dummy
15269 && (sym
->attr
.optional
|| sym
->attr
.intent
!= INTENT_UNKNOWN
))
15271 gfc_error ("Symbol at %L is not a DUMMY variable", &sym
->declared_at
);
15275 if (sym
->attr
.value
&& !sym
->attr
.dummy
)
15277 gfc_error ("%qs at %L cannot have the VALUE attribute because "
15278 "it is not a dummy argument", sym
->name
, &sym
->declared_at
);
15282 if (sym
->attr
.value
&& sym
->ts
.type
== BT_CHARACTER
)
15284 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
15285 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
15287 gfc_error ("Character dummy variable %qs at %L with VALUE "
15288 "attribute must have constant length",
15289 sym
->name
, &sym
->declared_at
);
15293 if (sym
->ts
.is_c_interop
15294 && mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
15296 gfc_error ("C interoperable character dummy variable %qs at %L "
15297 "with VALUE attribute must have length one",
15298 sym
->name
, &sym
->declared_at
);
15303 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15304 && sym
->ts
.u
.derived
->attr
.generic
)
15306 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
15307 if (!sym
->ts
.u
.derived
)
15309 gfc_error ("The derived type %qs at %L is of type %qs, "
15310 "which has not been defined", sym
->name
,
15311 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15312 sym
->ts
.type
= BT_UNKNOWN
;
15317 /* Use the same constraints as TYPE(*), except for the type check
15318 and that only scalars and assumed-size arrays are permitted. */
15319 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
15321 if (!sym
->attr
.dummy
)
15323 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
15324 "a dummy argument", sym
->name
, &sym
->declared_at
);
15328 if (sym
->ts
.type
!= BT_ASSUMED
&& sym
->ts
.type
!= BT_INTEGER
15329 && sym
->ts
.type
!= BT_REAL
&& sym
->ts
.type
!= BT_LOGICAL
15330 && sym
->ts
.type
!= BT_COMPLEX
)
15332 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
15333 "of type TYPE(*) or of an numeric intrinsic type",
15334 sym
->name
, &sym
->declared_at
);
15338 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
15339 || sym
->attr
.pointer
|| sym
->attr
.value
)
15341 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
15342 "have the ALLOCATABLE, CODIMENSION, POINTER or VALUE "
15343 "attribute", sym
->name
, &sym
->declared_at
);
15347 if (sym
->attr
.intent
== INTENT_OUT
)
15349 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
15350 "have the INTENT(OUT) attribute",
15351 sym
->name
, &sym
->declared_at
);
15354 if (sym
->attr
.dimension
&& sym
->as
->type
!= AS_ASSUMED_SIZE
)
15356 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall "
15357 "either be a scalar or an assumed-size array",
15358 sym
->name
, &sym
->declared_at
);
15362 /* Set the type to TYPE(*) and add a dimension(*) to ensure
15363 NO_ARG_CHECK is correctly handled in trans*.c, e.g. with
15365 sym
->ts
.type
= BT_ASSUMED
;
15366 sym
->as
= gfc_get_array_spec ();
15367 sym
->as
->type
= AS_ASSUMED_SIZE
;
15369 sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
15371 else if (sym
->ts
.type
== BT_ASSUMED
)
15373 /* TS 29113, C407a. */
15374 if (!sym
->attr
.dummy
)
15376 gfc_error ("Assumed type of variable %s at %L is only permitted "
15377 "for dummy variables", sym
->name
, &sym
->declared_at
);
15380 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
15381 || sym
->attr
.pointer
|| sym
->attr
.value
)
15383 gfc_error ("Assumed-type variable %s at %L may not have the "
15384 "ALLOCATABLE, CODIMENSION, POINTER or VALUE attribute",
15385 sym
->name
, &sym
->declared_at
);
15388 if (sym
->attr
.intent
== INTENT_OUT
)
15390 gfc_error ("Assumed-type variable %s at %L may not have the "
15391 "INTENT(OUT) attribute",
15392 sym
->name
, &sym
->declared_at
);
15395 if (sym
->attr
.dimension
&& sym
->as
->type
== AS_EXPLICIT
)
15397 gfc_error ("Assumed-type variable %s at %L shall not be an "
15398 "explicit-shape array", sym
->name
, &sym
->declared_at
);
15403 /* If the symbol is marked as bind(c), that it is declared at module level
15404 scope and verify its type and kind. Do not do the latter for symbols
15405 that are implicitly typed because that is handled in
15406 gfc_set_default_type. Handle dummy arguments and procedure definitions
15407 separately. Also, anything that is use associated is not handled here
15408 but instead is handled in the module it is declared in. Finally, derived
15409 type definitions are allowed to be BIND(C) since that only implies that
15410 they're interoperable, and they are checked fully for interoperability
15411 when a variable is declared of that type. */
15412 if (sym
->attr
.is_bind_c
&& sym
->attr
.use_assoc
== 0
15413 && sym
->attr
.dummy
== 0 && sym
->attr
.flavor
!= FL_PROCEDURE
15414 && sym
->attr
.flavor
!= FL_DERIVED
)
15418 /* First, make sure the variable is declared at the
15419 module-level scope (J3/04-007, Section 15.3). */
15420 if (sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
&&
15421 sym
->attr
.in_common
== 0)
15423 gfc_error ("Variable %qs at %L cannot be BIND(C) because it "
15424 "is neither a COMMON block nor declared at the "
15425 "module level scope", sym
->name
, &(sym
->declared_at
));
15428 else if (sym
->ts
.type
== BT_CHARACTER
15429 && (sym
->ts
.u
.cl
== NULL
|| sym
->ts
.u
.cl
->length
== NULL
15430 || !gfc_is_constant_expr (sym
->ts
.u
.cl
->length
)
15431 || mpz_cmp_si (sym
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
15433 gfc_error ("BIND(C) Variable %qs at %L must have length one",
15434 sym
->name
, &sym
->declared_at
);
15437 else if (sym
->common_head
!= NULL
&& sym
->attr
.implicit_type
== 0)
15439 t
= verify_com_block_vars_c_interop (sym
->common_head
);
15441 else if (sym
->attr
.implicit_type
== 0)
15443 /* If type() declaration, we need to verify that the components
15444 of the given type are all C interoperable, etc. */
15445 if (sym
->ts
.type
== BT_DERIVED
&&
15446 sym
->ts
.u
.derived
->attr
.is_c_interop
!= 1)
15448 /* Make sure the user marked the derived type as BIND(C). If
15449 not, call the verify routine. This could print an error
15450 for the derived type more than once if multiple variables
15451 of that type are declared. */
15452 if (sym
->ts
.u
.derived
->attr
.is_bind_c
!= 1)
15453 verify_bind_c_derived_type (sym
->ts
.u
.derived
);
15457 /* Verify the variable itself as C interoperable if it
15458 is BIND(C). It is not possible for this to succeed if
15459 the verify_bind_c_derived_type failed, so don't have to handle
15460 any error returned by verify_bind_c_derived_type. */
15461 t
= verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
15462 sym
->common_block
);
15467 /* clear the is_bind_c flag to prevent reporting errors more than
15468 once if something failed. */
15469 sym
->attr
.is_bind_c
= 0;
15474 /* If a derived type symbol has reached this point, without its
15475 type being declared, we have an error. Notice that most
15476 conditions that produce undefined derived types have already
15477 been dealt with. However, the likes of:
15478 implicit type(t) (t) ..... call foo (t) will get us here if
15479 the type is not declared in the scope of the implicit
15480 statement. Change the type to BT_UNKNOWN, both because it is so
15481 and to prevent an ICE. */
15482 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15483 && sym
->ts
.u
.derived
->components
== NULL
15484 && !sym
->ts
.u
.derived
->attr
.zero_comp
)
15486 gfc_error ("The derived type %qs at %L is of type %qs, "
15487 "which has not been defined", sym
->name
,
15488 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15489 sym
->ts
.type
= BT_UNKNOWN
;
15493 /* Make sure that the derived type has been resolved and that the
15494 derived type is visible in the symbol's namespace, if it is a
15495 module function and is not PRIVATE. */
15496 if (sym
->ts
.type
== BT_DERIVED
15497 && sym
->ts
.u
.derived
->attr
.use_assoc
15498 && sym
->ns
->proc_name
15499 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15500 && !resolve_fl_derived (sym
->ts
.u
.derived
))
15503 /* Unless the derived-type declaration is use associated, Fortran 95
15504 does not allow public entries of private derived types.
15505 See 4.4.1 (F95) and 4.5.1.1 (F2003); and related interpretation
15506 161 in 95-006r3. */
15507 if (sym
->ts
.type
== BT_DERIVED
15508 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15509 && !sym
->ts
.u
.derived
->attr
.use_assoc
15510 && gfc_check_symbol_access (sym
)
15511 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
15512 && !gfc_notify_std (GFC_STD_F2003
, "PUBLIC %s %qs at %L of PRIVATE "
15513 "derived type %qs",
15514 (sym
->attr
.flavor
== FL_PARAMETER
)
15515 ? "parameter" : "variable",
15516 sym
->name
, &sym
->declared_at
,
15517 sym
->ts
.u
.derived
->name
))
15520 /* F2008, C1302. */
15521 if (sym
->ts
.type
== BT_DERIVED
15522 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15523 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
15524 || sym
->ts
.u
.derived
->attr
.lock_comp
)
15525 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15527 gfc_error ("Variable %s at %L of type LOCK_TYPE or with subcomponent of "
15528 "type LOCK_TYPE must be a coarray", sym
->name
,
15529 &sym
->declared_at
);
15533 /* TS18508, C702/C703. */
15534 if (sym
->ts
.type
== BT_DERIVED
15535 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15536 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
15537 || sym
->ts
.u
.derived
->attr
.event_comp
)
15538 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15540 gfc_error ("Variable %s at %L of type EVENT_TYPE or with subcomponent of "
15541 "type EVENT_TYPE must be a coarray", sym
->name
,
15542 &sym
->declared_at
);
15546 /* An assumed-size array with INTENT(OUT) shall not be of a type for which
15547 default initialization is defined (5.1.2.4.4). */
15548 if (sym
->ts
.type
== BT_DERIVED
15550 && sym
->attr
.intent
== INTENT_OUT
15552 && sym
->as
->type
== AS_ASSUMED_SIZE
)
15554 for (c
= sym
->ts
.u
.derived
->components
; c
; c
= c
->next
)
15556 if (c
->initializer
)
15558 gfc_error ("The INTENT(OUT) dummy argument %qs at %L is "
15559 "ASSUMED SIZE and so cannot have a default initializer",
15560 sym
->name
, &sym
->declared_at
);
15567 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15568 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.lock_comp
)
15570 gfc_error ("Dummy argument %qs at %L of LOCK_TYPE shall not be "
15571 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15576 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15577 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.event_comp
)
15579 gfc_error ("Dummy argument %qs at %L of EVENT_TYPE shall not be "
15580 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15585 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15586 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15587 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15588 || class_attr
.codimension
)
15589 && (sym
->attr
.result
|| sym
->result
== sym
))
15591 gfc_error ("Function result %qs at %L shall not be a coarray or have "
15592 "a coarray component", sym
->name
, &sym
->declared_at
);
15597 if (sym
->attr
.codimension
&& sym
->ts
.type
== BT_DERIVED
15598 && sym
->ts
.u
.derived
->ts
.is_iso_c
)
15600 gfc_error ("Variable %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
15601 "shall not be a coarray", sym
->name
, &sym
->declared_at
);
15606 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15607 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15608 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15609 && (class_attr
.codimension
|| class_attr
.pointer
|| class_attr
.dimension
15610 || class_attr
.allocatable
))
15612 gfc_error ("Variable %qs at %L with coarray component shall be a "
15613 "nonpointer, nonallocatable scalar, which is not a coarray",
15614 sym
->name
, &sym
->declared_at
);
15618 /* F2008, C526. The function-result case was handled above. */
15619 if (class_attr
.codimension
15620 && !(class_attr
.allocatable
|| sym
->attr
.dummy
|| sym
->attr
.save
15621 || sym
->attr
.select_type_temporary
15622 || sym
->attr
.associate_var
15623 || (sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15624 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15625 || sym
->ns
->proc_name
->attr
.is_main_program
15626 || sym
->attr
.function
|| sym
->attr
.result
|| sym
->attr
.use_assoc
))
15628 gfc_error ("Variable %qs at %L is a coarray and is not ALLOCATABLE, SAVE "
15629 "nor a dummy argument", sym
->name
, &sym
->declared_at
);
15633 else if (class_attr
.codimension
&& !sym
->attr
.select_type_temporary
15634 && !class_attr
.allocatable
&& as
&& as
->cotype
== AS_DEFERRED
)
15636 gfc_error ("Coarray variable %qs at %L shall not have codimensions with "
15637 "deferred shape", sym
->name
, &sym
->declared_at
);
15640 else if (class_attr
.codimension
&& class_attr
.allocatable
&& as
15641 && (as
->cotype
!= AS_DEFERRED
|| as
->type
!= AS_DEFERRED
))
15643 gfc_error ("Allocatable coarray variable %qs at %L must have "
15644 "deferred shape", sym
->name
, &sym
->declared_at
);
15649 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15650 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15651 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15652 || (class_attr
.codimension
&& class_attr
.allocatable
))
15653 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
)
15655 gfc_error ("Variable %qs at %L is INTENT(OUT) and can thus not be an "
15656 "allocatable coarray or have coarray components",
15657 sym
->name
, &sym
->declared_at
);
15661 if (class_attr
.codimension
&& sym
->attr
.dummy
15662 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.is_bind_c
)
15664 gfc_error ("Coarray dummy variable %qs at %L not allowed in BIND(C) "
15665 "procedure %qs", sym
->name
, &sym
->declared_at
,
15666 sym
->ns
->proc_name
->name
);
15670 if (sym
->ts
.type
== BT_LOGICAL
15671 && ((sym
->attr
.function
&& sym
->attr
.is_bind_c
&& sym
->result
== sym
)
15672 || ((sym
->attr
.dummy
|| sym
->attr
.result
) && sym
->ns
->proc_name
15673 && sym
->ns
->proc_name
->attr
.is_bind_c
)))
15676 for (i
= 0; gfc_logical_kinds
[i
].kind
; i
++)
15677 if (gfc_logical_kinds
[i
].kind
== sym
->ts
.kind
)
15679 if (!gfc_logical_kinds
[i
].c_bool
&& sym
->attr
.dummy
15680 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL dummy argument %qs at "
15681 "%L with non-C_Bool kind in BIND(C) procedure "
15682 "%qs", sym
->name
, &sym
->declared_at
,
15683 sym
->ns
->proc_name
->name
))
15685 else if (!gfc_logical_kinds
[i
].c_bool
15686 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL result variable "
15687 "%qs at %L with non-C_Bool kind in "
15688 "BIND(C) procedure %qs", sym
->name
,
15690 sym
->attr
.function
? sym
->name
15691 : sym
->ns
->proc_name
->name
))
15695 switch (sym
->attr
.flavor
)
15698 if (!resolve_fl_variable (sym
, mp_flag
))
15703 if (sym
->formal
&& !sym
->formal_ns
)
15705 /* Check that none of the arguments are a namelist. */
15706 gfc_formal_arglist
*formal
= sym
->formal
;
15708 for (; formal
; formal
= formal
->next
)
15709 if (formal
->sym
&& formal
->sym
->attr
.flavor
== FL_NAMELIST
)
15711 gfc_error ("Namelist %qs cannot be an argument to "
15712 "subroutine or function at %L",
15713 formal
->sym
->name
, &sym
->declared_at
);
15718 if (!resolve_fl_procedure (sym
, mp_flag
))
15723 if (!resolve_fl_namelist (sym
))
15728 if (!resolve_fl_parameter (sym
))
15736 /* Resolve array specifier. Check as well some constraints
15737 on COMMON blocks. */
15739 check_constant
= sym
->attr
.in_common
&& !sym
->attr
.pointer
;
15741 /* Set the formal_arg_flag so that check_conflict will not throw
15742 an error for host associated variables in the specification
15743 expression for an array_valued function. */
15744 if ((sym
->attr
.function
|| sym
->attr
.result
) && sym
->as
)
15745 formal_arg_flag
= true;
15747 saved_specification_expr
= specification_expr
;
15748 specification_expr
= true;
15749 gfc_resolve_array_spec (sym
->as
, check_constant
);
15750 specification_expr
= saved_specification_expr
;
15752 formal_arg_flag
= false;
15754 /* Resolve formal namespaces. */
15755 if (sym
->formal_ns
&& sym
->formal_ns
!= gfc_current_ns
15756 && !sym
->attr
.contained
&& !sym
->attr
.intrinsic
)
15757 gfc_resolve (sym
->formal_ns
);
15759 /* Make sure the formal namespace is present. */
15760 if (sym
->formal
&& !sym
->formal_ns
)
15762 gfc_formal_arglist
*formal
= sym
->formal
;
15763 while (formal
&& !formal
->sym
)
15764 formal
= formal
->next
;
15768 sym
->formal_ns
= formal
->sym
->ns
;
15769 if (sym
->ns
!= formal
->sym
->ns
)
15770 sym
->formal_ns
->refs
++;
15774 /* Check threadprivate restrictions. */
15775 if (sym
->attr
.threadprivate
&& !sym
->attr
.save
15776 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15777 && (!sym
->attr
.in_common
15778 && sym
->module
== NULL
15779 && (sym
->ns
->proc_name
== NULL
15780 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15781 gfc_error ("Threadprivate at %L isn't SAVEd", &sym
->declared_at
);
15783 /* Check omp declare target restrictions. */
15784 if (sym
->attr
.omp_declare_target
15785 && sym
->attr
.flavor
== FL_VARIABLE
15787 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15788 && (!sym
->attr
.in_common
15789 && sym
->module
== NULL
15790 && (sym
->ns
->proc_name
== NULL
15791 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15792 gfc_error ("!$OMP DECLARE TARGET variable %qs at %L isn't SAVEd",
15793 sym
->name
, &sym
->declared_at
);
15795 /* If we have come this far we can apply default-initializers, as
15796 described in 14.7.5, to those variables that have not already
15797 been assigned one. */
15798 if (sym
->ts
.type
== BT_DERIVED
15800 && !sym
->attr
.allocatable
15801 && !sym
->attr
.alloc_comp
)
15803 symbol_attribute
*a
= &sym
->attr
;
15805 if ((!a
->save
&& !a
->dummy
&& !a
->pointer
15806 && !a
->in_common
&& !a
->use_assoc
15808 && !((a
->function
|| a
->result
)
15810 || sym
->ts
.u
.derived
->attr
.alloc_comp
15811 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15812 && !(a
->function
&& sym
!= sym
->result
))
15813 || (a
->dummy
&& a
->intent
== INTENT_OUT
&& !a
->pointer
))
15814 apply_default_init (sym
);
15815 else if (a
->function
&& sym
->result
&& a
->access
!= ACCESS_PRIVATE
15816 && (sym
->ts
.u
.derived
->attr
.alloc_comp
15817 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15818 /* Mark the result symbol to be referenced, when it has allocatable
15820 sym
->result
->attr
.referenced
= 1;
15823 if (sym
->ts
.type
== BT_CLASS
&& sym
->ns
== gfc_current_ns
15824 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
15825 && !CLASS_DATA (sym
)->attr
.class_pointer
15826 && !CLASS_DATA (sym
)->attr
.allocatable
)
15827 apply_default_init (sym
);
15829 /* If this symbol has a type-spec, check it. */
15830 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
15831 || (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
))
15832 if (!resolve_typespec_used (&sym
->ts
, &sym
->declared_at
, sym
->name
))
15835 if (sym
->param_list
)
15840 /************* Resolve DATA statements *************/
15844 gfc_data_value
*vnode
;
15850 /* Advance the values structure to point to the next value in the data list. */
15853 next_data_value (void)
15855 while (mpz_cmp_ui (values
.left
, 0) == 0)
15858 if (values
.vnode
->next
== NULL
)
15861 values
.vnode
= values
.vnode
->next
;
15862 mpz_set (values
.left
, values
.vnode
->repeat
);
15870 check_data_variable (gfc_data_variable
*var
, locus
*where
)
15876 ar_type mark
= AR_UNKNOWN
;
15878 mpz_t section_index
[GFC_MAX_DIMENSIONS
];
15884 if (!gfc_resolve_expr (var
->expr
))
15888 mpz_init_set_si (offset
, 0);
15891 if (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
15892 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
15893 e
= e
->value
.function
.actual
->expr
;
15895 if (e
->expr_type
!= EXPR_VARIABLE
)
15897 gfc_error ("Expecting definable entity near %L", where
);
15901 sym
= e
->symtree
->n
.sym
;
15903 if (sym
->ns
->is_block_data
&& !sym
->attr
.in_common
)
15905 gfc_error ("BLOCK DATA element %qs at %L must be in COMMON",
15906 sym
->name
, &sym
->declared_at
);
15910 if (e
->ref
== NULL
&& sym
->as
)
15912 gfc_error ("DATA array %qs at %L must be specified in a previous"
15913 " declaration", sym
->name
, where
);
15917 if (gfc_is_coindexed (e
))
15919 gfc_error ("DATA element %qs at %L cannot have a coindex", sym
->name
,
15924 has_pointer
= sym
->attr
.pointer
;
15926 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15928 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.pointer
)
15933 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.type
!= AR_FULL
)
15935 gfc_error ("DATA element %qs at %L is a pointer and so must "
15936 "be a full array", sym
->name
, where
);
15940 if (values
.vnode
->expr
->expr_type
== EXPR_CONSTANT
)
15942 gfc_error ("DATA object near %L has the pointer attribute "
15943 "and the corresponding DATA value is not a valid "
15944 "initial-data-target", where
);
15950 if (e
->rank
== 0 || has_pointer
)
15952 mpz_init_set_ui (size
, 1);
15959 /* Find the array section reference. */
15960 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15962 if (ref
->type
!= REF_ARRAY
)
15964 if (ref
->u
.ar
.type
== AR_ELEMENT
)
15970 /* Set marks according to the reference pattern. */
15971 switch (ref
->u
.ar
.type
)
15979 /* Get the start position of array section. */
15980 gfc_get_section_index (ar
, section_index
, &offset
);
15985 gcc_unreachable ();
15988 if (!gfc_array_size (e
, &size
))
15990 gfc_error ("Nonconstant array section at %L in DATA statement",
15992 mpz_clear (offset
);
15999 while (mpz_cmp_ui (size
, 0) > 0)
16001 if (!next_data_value ())
16003 gfc_error ("DATA statement at %L has more variables than values",
16009 t
= gfc_check_assign (var
->expr
, values
.vnode
->expr
, 0);
16013 /* If we have more than one element left in the repeat count,
16014 and we have more than one element left in the target variable,
16015 then create a range assignment. */
16016 /* FIXME: Only done for full arrays for now, since array sections
16018 if (mark
== AR_FULL
&& ref
&& ref
->next
== NULL
16019 && mpz_cmp_ui (values
.left
, 1) > 0 && mpz_cmp_ui (size
, 1) > 0)
16023 if (mpz_cmp (size
, values
.left
) >= 0)
16025 mpz_init_set (range
, values
.left
);
16026 mpz_sub (size
, size
, values
.left
);
16027 mpz_set_ui (values
.left
, 0);
16031 mpz_init_set (range
, size
);
16032 mpz_sub (values
.left
, values
.left
, size
);
16033 mpz_set_ui (size
, 0);
16036 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
16039 mpz_add (offset
, offset
, range
);
16046 /* Assign initial value to symbol. */
16049 mpz_sub_ui (values
.left
, values
.left
, 1);
16050 mpz_sub_ui (size
, size
, 1);
16052 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
16057 if (mark
== AR_FULL
)
16058 mpz_add_ui (offset
, offset
, 1);
16060 /* Modify the array section indexes and recalculate the offset
16061 for next element. */
16062 else if (mark
== AR_SECTION
)
16063 gfc_advance_section (section_index
, ar
, &offset
);
16067 if (mark
== AR_SECTION
)
16069 for (i
= 0; i
< ar
->dimen
; i
++)
16070 mpz_clear (section_index
[i
]);
16074 mpz_clear (offset
);
16080 static bool traverse_data_var (gfc_data_variable
*, locus
*);
16082 /* Iterate over a list of elements in a DATA statement. */
16085 traverse_data_list (gfc_data_variable
*var
, locus
*where
)
16088 iterator_stack frame
;
16089 gfc_expr
*e
, *start
, *end
, *step
;
16090 bool retval
= true;
16092 mpz_init (frame
.value
);
16095 start
= gfc_copy_expr (var
->iter
.start
);
16096 end
= gfc_copy_expr (var
->iter
.end
);
16097 step
= gfc_copy_expr (var
->iter
.step
);
16099 if (!gfc_simplify_expr (start
, 1)
16100 || start
->expr_type
!= EXPR_CONSTANT
)
16102 gfc_error ("start of implied-do loop at %L could not be "
16103 "simplified to a constant value", &start
->where
);
16107 if (!gfc_simplify_expr (end
, 1)
16108 || end
->expr_type
!= EXPR_CONSTANT
)
16110 gfc_error ("end of implied-do loop at %L could not be "
16111 "simplified to a constant value", &start
->where
);
16115 if (!gfc_simplify_expr (step
, 1)
16116 || step
->expr_type
!= EXPR_CONSTANT
)
16118 gfc_error ("step of implied-do loop at %L could not be "
16119 "simplified to a constant value", &start
->where
);
16124 mpz_set (trip
, end
->value
.integer
);
16125 mpz_sub (trip
, trip
, start
->value
.integer
);
16126 mpz_add (trip
, trip
, step
->value
.integer
);
16128 mpz_div (trip
, trip
, step
->value
.integer
);
16130 mpz_set (frame
.value
, start
->value
.integer
);
16132 frame
.prev
= iter_stack
;
16133 frame
.variable
= var
->iter
.var
->symtree
;
16134 iter_stack
= &frame
;
16136 while (mpz_cmp_ui (trip
, 0) > 0)
16138 if (!traverse_data_var (var
->list
, where
))
16144 e
= gfc_copy_expr (var
->expr
);
16145 if (!gfc_simplify_expr (e
, 1))
16152 mpz_add (frame
.value
, frame
.value
, step
->value
.integer
);
16154 mpz_sub_ui (trip
, trip
, 1);
16158 mpz_clear (frame
.value
);
16161 gfc_free_expr (start
);
16162 gfc_free_expr (end
);
16163 gfc_free_expr (step
);
16165 iter_stack
= frame
.prev
;
16170 /* Type resolve variables in the variable list of a DATA statement. */
16173 traverse_data_var (gfc_data_variable
*var
, locus
*where
)
16177 for (; var
; var
= var
->next
)
16179 if (var
->expr
== NULL
)
16180 t
= traverse_data_list (var
, where
);
16182 t
= check_data_variable (var
, where
);
16192 /* Resolve the expressions and iterators associated with a data statement.
16193 This is separate from the assignment checking because data lists should
16194 only be resolved once. */
16197 resolve_data_variables (gfc_data_variable
*d
)
16199 for (; d
; d
= d
->next
)
16201 if (d
->list
== NULL
)
16203 if (!gfc_resolve_expr (d
->expr
))
16208 if (!gfc_resolve_iterator (&d
->iter
, false, true))
16211 if (!resolve_data_variables (d
->list
))
16220 /* Resolve a single DATA statement. We implement this by storing a pointer to
16221 the value list into static variables, and then recursively traversing the
16222 variables list, expanding iterators and such. */
16225 resolve_data (gfc_data
*d
)
16228 if (!resolve_data_variables (d
->var
))
16231 values
.vnode
= d
->value
;
16232 if (d
->value
== NULL
)
16233 mpz_set_ui (values
.left
, 0);
16235 mpz_set (values
.left
, d
->value
->repeat
);
16237 if (!traverse_data_var (d
->var
, &d
->where
))
16240 /* At this point, we better not have any values left. */
16242 if (next_data_value ())
16243 gfc_error ("DATA statement at %L has more values than variables",
16248 /* 12.6 Constraint: In a pure subprogram any variable which is in common or
16249 accessed by host or use association, is a dummy argument to a pure function,
16250 is a dummy argument with INTENT (IN) to a pure subroutine, or an object that
16251 is storage associated with any such variable, shall not be used in the
16252 following contexts: (clients of this function). */
16254 /* Determines if a variable is not 'pure', i.e., not assignable within a pure
16255 procedure. Returns zero if assignment is OK, nonzero if there is a
16258 gfc_impure_variable (gfc_symbol
*sym
)
16263 if (sym
->attr
.use_assoc
|| sym
->attr
.in_common
)
16266 /* Check if the symbol's ns is inside the pure procedure. */
16267 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16271 if (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.function
)
16275 proc
= sym
->ns
->proc_name
;
16276 if (sym
->attr
.dummy
16277 && ((proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_IN
)
16278 || proc
->attr
.function
))
16281 /* TODO: Sort out what can be storage associated, if anything, and include
16282 it here. In principle equivalences should be scanned but it does not
16283 seem to be possible to storage associate an impure variable this way. */
16288 /* Test whether a symbol is pure or not. For a NULL pointer, checks if the
16289 current namespace is inside a pure procedure. */
16292 gfc_pure (gfc_symbol
*sym
)
16294 symbol_attribute attr
;
16299 /* Check if the current namespace or one of its parents
16300 belongs to a pure procedure. */
16301 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16303 sym
= ns
->proc_name
;
16307 if (attr
.flavor
== FL_PROCEDURE
&& attr
.pure
)
16315 return attr
.flavor
== FL_PROCEDURE
&& attr
.pure
;
16319 /* Test whether a symbol is implicitly pure or not. For a NULL pointer,
16320 checks if the current namespace is implicitly pure. Note that this
16321 function returns false for a PURE procedure. */
16324 gfc_implicit_pure (gfc_symbol
*sym
)
16330 /* Check if the current procedure is implicit_pure. Walk up
16331 the procedure list until we find a procedure. */
16332 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16334 sym
= ns
->proc_name
;
16338 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16343 return sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.implicit_pure
16344 && !sym
->attr
.pure
;
16349 gfc_unset_implicit_pure (gfc_symbol
*sym
)
16355 /* Check if the current procedure is implicit_pure. Walk up
16356 the procedure list until we find a procedure. */
16357 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16359 sym
= ns
->proc_name
;
16363 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16368 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16369 sym
->attr
.implicit_pure
= 0;
16371 sym
->attr
.pure
= 0;
16375 /* Test whether the current procedure is elemental or not. */
16378 gfc_elemental (gfc_symbol
*sym
)
16380 symbol_attribute attr
;
16383 sym
= gfc_current_ns
->proc_name
;
16388 return attr
.flavor
== FL_PROCEDURE
&& attr
.elemental
;
16392 /* Warn about unused labels. */
16395 warn_unused_fortran_label (gfc_st_label
*label
)
16400 warn_unused_fortran_label (label
->left
);
16402 if (label
->defined
== ST_LABEL_UNKNOWN
)
16405 switch (label
->referenced
)
16407 case ST_LABEL_UNKNOWN
:
16408 gfc_warning (OPT_Wunused_label
, "Label %d at %L defined but not used",
16409 label
->value
, &label
->where
);
16412 case ST_LABEL_BAD_TARGET
:
16413 gfc_warning (OPT_Wunused_label
,
16414 "Label %d at %L defined but cannot be used",
16415 label
->value
, &label
->where
);
16422 warn_unused_fortran_label (label
->right
);
16426 /* Returns the sequence type of a symbol or sequence. */
16429 sequence_type (gfc_typespec ts
)
16438 if (ts
.u
.derived
->components
== NULL
)
16439 return SEQ_NONDEFAULT
;
16441 result
= sequence_type (ts
.u
.derived
->components
->ts
);
16442 for (c
= ts
.u
.derived
->components
->next
; c
; c
= c
->next
)
16443 if (sequence_type (c
->ts
) != result
)
16449 if (ts
.kind
!= gfc_default_character_kind
)
16450 return SEQ_NONDEFAULT
;
16452 return SEQ_CHARACTER
;
16455 if (ts
.kind
!= gfc_default_integer_kind
)
16456 return SEQ_NONDEFAULT
;
16458 return SEQ_NUMERIC
;
16461 if (!(ts
.kind
== gfc_default_real_kind
16462 || ts
.kind
== gfc_default_double_kind
))
16463 return SEQ_NONDEFAULT
;
16465 return SEQ_NUMERIC
;
16468 if (ts
.kind
!= gfc_default_complex_kind
)
16469 return SEQ_NONDEFAULT
;
16471 return SEQ_NUMERIC
;
16474 if (ts
.kind
!= gfc_default_logical_kind
)
16475 return SEQ_NONDEFAULT
;
16477 return SEQ_NUMERIC
;
16480 return SEQ_NONDEFAULT
;
16485 /* Resolve derived type EQUIVALENCE object. */
16488 resolve_equivalence_derived (gfc_symbol
*derived
, gfc_symbol
*sym
, gfc_expr
*e
)
16490 gfc_component
*c
= derived
->components
;
16495 /* Shall not be an object of nonsequence derived type. */
16496 if (!derived
->attr
.sequence
)
16498 gfc_error ("Derived type variable %qs at %L must have SEQUENCE "
16499 "attribute to be an EQUIVALENCE object", sym
->name
,
16504 /* Shall not have allocatable components. */
16505 if (derived
->attr
.alloc_comp
)
16507 gfc_error ("Derived type variable %qs at %L cannot have ALLOCATABLE "
16508 "components to be an EQUIVALENCE object",sym
->name
,
16513 if (sym
->attr
.in_common
&& gfc_has_default_initializer (sym
->ts
.u
.derived
))
16515 gfc_error ("Derived type variable %qs at %L with default "
16516 "initialization cannot be in EQUIVALENCE with a variable "
16517 "in COMMON", sym
->name
, &e
->where
);
16521 for (; c
; c
= c
->next
)
16523 if (gfc_bt_struct (c
->ts
.type
)
16524 && (!resolve_equivalence_derived(c
->ts
.u
.derived
, sym
, e
)))
16527 /* Shall not be an object of sequence derived type containing a pointer
16528 in the structure. */
16529 if (c
->attr
.pointer
)
16531 gfc_error ("Derived type variable %qs at %L with pointer "
16532 "component(s) cannot be an EQUIVALENCE object",
16533 sym
->name
, &e
->where
);
16541 /* Resolve equivalence object.
16542 An EQUIVALENCE object shall not be a dummy argument, a pointer, a target,
16543 an allocatable array, an object of nonsequence derived type, an object of
16544 sequence derived type containing a pointer at any level of component
16545 selection, an automatic object, a function name, an entry name, a result
16546 name, a named constant, a structure component, or a subobject of any of
16547 the preceding objects. A substring shall not have length zero. A
16548 derived type shall not have components with default initialization nor
16549 shall two objects of an equivalence group be initialized.
16550 Either all or none of the objects shall have an protected attribute.
16551 The simple constraints are done in symbol.c(check_conflict) and the rest
16552 are implemented here. */
16555 resolve_equivalence (gfc_equiv
*eq
)
16558 gfc_symbol
*first_sym
;
16561 locus
*last_where
= NULL
;
16562 seq_type eq_type
, last_eq_type
;
16563 gfc_typespec
*last_ts
;
16564 int object
, cnt_protected
;
16567 last_ts
= &eq
->expr
->symtree
->n
.sym
->ts
;
16569 first_sym
= eq
->expr
->symtree
->n
.sym
;
16573 for (object
= 1; eq
; eq
= eq
->eq
, object
++)
16577 e
->ts
= e
->symtree
->n
.sym
->ts
;
16578 /* match_varspec might not know yet if it is seeing
16579 array reference or substring reference, as it doesn't
16581 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
)
16583 gfc_ref
*ref
= e
->ref
;
16584 sym
= e
->symtree
->n
.sym
;
16586 if (sym
->attr
.dimension
)
16588 ref
->u
.ar
.as
= sym
->as
;
16592 /* For substrings, convert REF_ARRAY into REF_SUBSTRING. */
16593 if (e
->ts
.type
== BT_CHARACTER
16595 && ref
->type
== REF_ARRAY
16596 && ref
->u
.ar
.dimen
== 1
16597 && ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
16598 && ref
->u
.ar
.stride
[0] == NULL
)
16600 gfc_expr
*start
= ref
->u
.ar
.start
[0];
16601 gfc_expr
*end
= ref
->u
.ar
.end
[0];
16604 /* Optimize away the (:) reference. */
16605 if (start
== NULL
&& end
== NULL
)
16608 e
->ref
= ref
->next
;
16610 e
->ref
->next
= ref
->next
;
16615 ref
->type
= REF_SUBSTRING
;
16617 start
= gfc_get_int_expr (gfc_charlen_int_kind
,
16619 ref
->u
.ss
.start
= start
;
16620 if (end
== NULL
&& e
->ts
.u
.cl
)
16621 end
= gfc_copy_expr (e
->ts
.u
.cl
->length
);
16622 ref
->u
.ss
.end
= end
;
16623 ref
->u
.ss
.length
= e
->ts
.u
.cl
;
16630 /* Any further ref is an error. */
16633 gcc_assert (ref
->type
== REF_ARRAY
);
16634 gfc_error ("Syntax error in EQUIVALENCE statement at %L",
16640 if (!gfc_resolve_expr (e
))
16643 sym
= e
->symtree
->n
.sym
;
16645 if (sym
->attr
.is_protected
)
16647 if (cnt_protected
> 0 && cnt_protected
!= object
)
16649 gfc_error ("Either all or none of the objects in the "
16650 "EQUIVALENCE set at %L shall have the "
16651 "PROTECTED attribute",
16656 /* Shall not equivalence common block variables in a PURE procedure. */
16657 if (sym
->ns
->proc_name
16658 && sym
->ns
->proc_name
->attr
.pure
16659 && sym
->attr
.in_common
)
16661 /* Need to check for symbols that may have entered the pure
16662 procedure via a USE statement. */
16663 bool saw_sym
= false;
16664 if (sym
->ns
->use_stmts
)
16667 for (r
= sym
->ns
->use_stmts
->rename
; r
; r
= r
->next
)
16668 if (strcmp(r
->use_name
, sym
->name
) == 0) saw_sym
= true;
16674 gfc_error ("COMMON block member %qs at %L cannot be an "
16675 "EQUIVALENCE object in the pure procedure %qs",
16676 sym
->name
, &e
->where
, sym
->ns
->proc_name
->name
);
16680 /* Shall not be a named constant. */
16681 if (e
->expr_type
== EXPR_CONSTANT
)
16683 gfc_error ("Named constant %qs at %L cannot be an EQUIVALENCE "
16684 "object", sym
->name
, &e
->where
);
16688 if (e
->ts
.type
== BT_DERIVED
16689 && !resolve_equivalence_derived (e
->ts
.u
.derived
, sym
, e
))
16692 /* Check that the types correspond correctly:
16694 A numeric sequence structure may be equivalenced to another sequence
16695 structure, an object of default integer type, default real type, double
16696 precision real type, default logical type such that components of the
16697 structure ultimately only become associated to objects of the same
16698 kind. A character sequence structure may be equivalenced to an object
16699 of default character kind or another character sequence structure.
16700 Other objects may be equivalenced only to objects of the same type and
16701 kind parameters. */
16703 /* Identical types are unconditionally OK. */
16704 if (object
== 1 || gfc_compare_types (last_ts
, &sym
->ts
))
16705 goto identical_types
;
16707 last_eq_type
= sequence_type (*last_ts
);
16708 eq_type
= sequence_type (sym
->ts
);
16710 /* Since the pair of objects is not of the same type, mixed or
16711 non-default sequences can be rejected. */
16713 msg
= "Sequence %s with mixed components in EQUIVALENCE "
16714 "statement at %L with different type objects";
16716 && last_eq_type
== SEQ_MIXED
16717 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16718 || (eq_type
== SEQ_MIXED
16719 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16722 msg
= "Non-default type object or sequence %s in EQUIVALENCE "
16723 "statement at %L with objects of different type";
16725 && last_eq_type
== SEQ_NONDEFAULT
16726 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16727 || (eq_type
== SEQ_NONDEFAULT
16728 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16731 msg
="Non-CHARACTER object %qs in default CHARACTER "
16732 "EQUIVALENCE statement at %L";
16733 if (last_eq_type
== SEQ_CHARACTER
16734 && eq_type
!= SEQ_CHARACTER
16735 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16738 msg
="Non-NUMERIC object %qs in default NUMERIC "
16739 "EQUIVALENCE statement at %L";
16740 if (last_eq_type
== SEQ_NUMERIC
16741 && eq_type
!= SEQ_NUMERIC
16742 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16747 last_where
= &e
->where
;
16752 /* Shall not be an automatic array. */
16753 if (e
->ref
->type
== REF_ARRAY
16754 && !gfc_resolve_array_spec (e
->ref
->u
.ar
.as
, 1))
16756 gfc_error ("Array %qs at %L with non-constant bounds cannot be "
16757 "an EQUIVALENCE object", sym
->name
, &e
->where
);
16764 /* Shall not be a structure component. */
16765 if (r
->type
== REF_COMPONENT
)
16767 gfc_error ("Structure component %qs at %L cannot be an "
16768 "EQUIVALENCE object",
16769 r
->u
.c
.component
->name
, &e
->where
);
16773 /* A substring shall not have length zero. */
16774 if (r
->type
== REF_SUBSTRING
)
16776 if (compare_bound (r
->u
.ss
.start
, r
->u
.ss
.end
) == CMP_GT
)
16778 gfc_error ("Substring at %L has length zero",
16779 &r
->u
.ss
.start
->where
);
16789 /* Function called by resolve_fntype to flag other symbol used in the
16790 length type parameter specification of function resuls. */
16793 flag_fn_result_spec (gfc_expr
*expr
,
16795 int *f ATTRIBUTE_UNUSED
)
16800 if (expr
->expr_type
== EXPR_VARIABLE
)
16802 s
= expr
->symtree
->n
.sym
;
16803 for (ns
= s
->ns
; ns
; ns
= ns
->parent
)
16809 gfc_error ("Self reference in character length expression "
16810 "for %qs at %L", sym
->name
, &expr
->where
);
16814 if (!s
->fn_result_spec
16815 && s
->attr
.flavor
== FL_PARAMETER
)
16817 /* Function contained in a module.... */
16818 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_MODULE
)
16821 s
->fn_result_spec
= 1;
16822 /* Make sure that this symbol is translated as a module
16824 st
= gfc_get_unique_symtree (ns
);
16828 /* ... which is use associated and called. */
16829 else if (s
->attr
.use_assoc
|| s
->attr
.used_in_submodule
16831 /* External function matched with an interface. */
16834 && s
->ns
->proc_name
->attr
.if_source
== IFSRC_DECL
)
16835 || s
->ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16836 && s
->ns
->proc_name
->attr
.function
))
16837 s
->fn_result_spec
= 1;
16844 /* Resolve function and ENTRY types, issue diagnostics if needed. */
16847 resolve_fntype (gfc_namespace
*ns
)
16849 gfc_entry_list
*el
;
16852 if (ns
->proc_name
== NULL
|| !ns
->proc_name
->attr
.function
)
16855 /* If there are any entries, ns->proc_name is the entry master
16856 synthetic symbol and ns->entries->sym actual FUNCTION symbol. */
16858 sym
= ns
->entries
->sym
;
16860 sym
= ns
->proc_name
;
16861 if (sym
->result
== sym
16862 && sym
->ts
.type
== BT_UNKNOWN
16863 && !gfc_set_default_type (sym
, 0, NULL
)
16864 && !sym
->attr
.untyped
)
16866 gfc_error ("Function %qs at %L has no IMPLICIT type",
16867 sym
->name
, &sym
->declared_at
);
16868 sym
->attr
.untyped
= 1;
16871 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->ts
.u
.derived
->attr
.use_assoc
16872 && !sym
->attr
.contained
16873 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
16874 && gfc_check_symbol_access (sym
))
16876 gfc_notify_std (GFC_STD_F2003
, "PUBLIC function %qs at "
16877 "%L of PRIVATE type %qs", sym
->name
,
16878 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
16882 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
16884 if (el
->sym
->result
== el
->sym
16885 && el
->sym
->ts
.type
== BT_UNKNOWN
16886 && !gfc_set_default_type (el
->sym
, 0, NULL
)
16887 && !el
->sym
->attr
.untyped
)
16889 gfc_error ("ENTRY %qs at %L has no IMPLICIT type",
16890 el
->sym
->name
, &el
->sym
->declared_at
);
16891 el
->sym
->attr
.untyped
= 1;
16895 if (sym
->ts
.type
== BT_CHARACTER
)
16896 gfc_traverse_expr (sym
->ts
.u
.cl
->length
, sym
, flag_fn_result_spec
, 0);
16900 /* 12.3.2.1.1 Defined operators. */
16903 check_uop_procedure (gfc_symbol
*sym
, locus where
)
16905 gfc_formal_arglist
*formal
;
16907 if (!sym
->attr
.function
)
16909 gfc_error ("User operator procedure %qs at %L must be a FUNCTION",
16910 sym
->name
, &where
);
16914 if (sym
->ts
.type
== BT_CHARACTER
16915 && !((sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
) || sym
->ts
.deferred
)
16916 && !(sym
->result
&& ((sym
->result
->ts
.u
.cl
16917 && sym
->result
->ts
.u
.cl
->length
) || sym
->result
->ts
.deferred
)))
16919 gfc_error ("User operator procedure %qs at %L cannot be assumed "
16920 "character length", sym
->name
, &where
);
16924 formal
= gfc_sym_get_dummy_args (sym
);
16925 if (!formal
|| !formal
->sym
)
16927 gfc_error ("User operator procedure %qs at %L must have at least "
16928 "one argument", sym
->name
, &where
);
16932 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16934 gfc_error ("First argument of operator interface at %L must be "
16935 "INTENT(IN)", &where
);
16939 if (formal
->sym
->attr
.optional
)
16941 gfc_error ("First argument of operator interface at %L cannot be "
16942 "optional", &where
);
16946 formal
= formal
->next
;
16947 if (!formal
|| !formal
->sym
)
16950 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16952 gfc_error ("Second argument of operator interface at %L must be "
16953 "INTENT(IN)", &where
);
16957 if (formal
->sym
->attr
.optional
)
16959 gfc_error ("Second argument of operator interface at %L cannot be "
16960 "optional", &where
);
16966 gfc_error ("Operator interface at %L must have, at most, two "
16967 "arguments", &where
);
16975 gfc_resolve_uops (gfc_symtree
*symtree
)
16977 gfc_interface
*itr
;
16979 if (symtree
== NULL
)
16982 gfc_resolve_uops (symtree
->left
);
16983 gfc_resolve_uops (symtree
->right
);
16985 for (itr
= symtree
->n
.uop
->op
; itr
; itr
= itr
->next
)
16986 check_uop_procedure (itr
->sym
, itr
->sym
->declared_at
);
16990 /* Examine all of the expressions associated with a program unit,
16991 assign types to all intermediate expressions, make sure that all
16992 assignments are to compatible types and figure out which names
16993 refer to which functions or subroutines. It doesn't check code
16994 block, which is handled by gfc_resolve_code. */
16997 resolve_types (gfc_namespace
*ns
)
17003 gfc_namespace
* old_ns
= gfc_current_ns
;
17005 if (ns
->types_resolved
)
17008 /* Check that all IMPLICIT types are ok. */
17009 if (!ns
->seen_implicit_none
)
17012 for (letter
= 0; letter
!= GFC_LETTERS
; ++letter
)
17013 if (ns
->set_flag
[letter
]
17014 && !resolve_typespec_used (&ns
->default_type
[letter
],
17015 &ns
->implicit_loc
[letter
], NULL
))
17019 gfc_current_ns
= ns
;
17021 resolve_entries (ns
);
17023 resolve_common_vars (&ns
->blank_common
, false);
17024 resolve_common_blocks (ns
->common_root
);
17026 resolve_contained_functions (ns
);
17028 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
17029 && ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
17030 resolve_formal_arglist (ns
->proc_name
);
17032 gfc_traverse_ns (ns
, resolve_bind_c_derived_types
);
17034 for (cl
= ns
->cl_list
; cl
; cl
= cl
->next
)
17035 resolve_charlen (cl
);
17037 gfc_traverse_ns (ns
, resolve_symbol
);
17039 resolve_fntype (ns
);
17041 for (n
= ns
->contained
; n
; n
= n
->sibling
)
17043 if (gfc_pure (ns
->proc_name
) && !gfc_pure (n
->proc_name
))
17044 gfc_error ("Contained procedure %qs at %L of a PURE procedure must "
17045 "also be PURE", n
->proc_name
->name
,
17046 &n
->proc_name
->declared_at
);
17052 gfc_do_concurrent_flag
= 0;
17053 gfc_check_interfaces (ns
);
17055 gfc_traverse_ns (ns
, resolve_values
);
17057 if (ns
->save_all
|| !flag_automatic
)
17061 for (d
= ns
->data
; d
; d
= d
->next
)
17065 gfc_traverse_ns (ns
, gfc_formalize_init_value
);
17067 gfc_traverse_ns (ns
, gfc_verify_binding_labels
);
17069 for (eq
= ns
->equiv
; eq
; eq
= eq
->next
)
17070 resolve_equivalence (eq
);
17072 /* Warn about unused labels. */
17073 if (warn_unused_label
)
17074 warn_unused_fortran_label (ns
->st_labels
);
17076 gfc_resolve_uops (ns
->uop_root
);
17078 gfc_traverse_ns (ns
, gfc_verify_DTIO_procedures
);
17080 gfc_resolve_omp_declare_simd (ns
);
17082 gfc_resolve_omp_udrs (ns
->omp_udr_root
);
17084 ns
->types_resolved
= 1;
17086 gfc_current_ns
= old_ns
;
17090 /* Call gfc_resolve_code recursively. */
17093 resolve_codes (gfc_namespace
*ns
)
17096 bitmap_obstack old_obstack
;
17098 if (ns
->resolved
== 1)
17101 for (n
= ns
->contained
; n
; n
= n
->sibling
)
17104 gfc_current_ns
= ns
;
17106 /* Don't clear 'cs_base' if this is the namespace of a BLOCK construct. */
17107 if (!(ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_LABEL
))
17110 /* Set to an out of range value. */
17111 current_entry_id
= -1;
17113 old_obstack
= labels_obstack
;
17114 bitmap_obstack_initialize (&labels_obstack
);
17116 gfc_resolve_oacc_declare (ns
);
17117 gfc_resolve_oacc_routines (ns
);
17118 gfc_resolve_omp_local_vars (ns
);
17119 gfc_resolve_code (ns
->code
, ns
);
17121 bitmap_obstack_release (&labels_obstack
);
17122 labels_obstack
= old_obstack
;
17126 /* This function is called after a complete program unit has been compiled.
17127 Its purpose is to examine all of the expressions associated with a program
17128 unit, assign types to all intermediate expressions, make sure that all
17129 assignments are to compatible types and figure out which names refer to
17130 which functions or subroutines. */
17133 gfc_resolve (gfc_namespace
*ns
)
17135 gfc_namespace
*old_ns
;
17136 code_stack
*old_cs_base
;
17137 struct gfc_omp_saved_state old_omp_state
;
17143 old_ns
= gfc_current_ns
;
17144 old_cs_base
= cs_base
;
17146 /* As gfc_resolve can be called during resolution of an OpenMP construct
17147 body, we should clear any state associated to it, so that say NS's
17148 DO loops are not interpreted as OpenMP loops. */
17149 if (!ns
->construct_entities
)
17150 gfc_omp_save_and_clear_state (&old_omp_state
);
17152 resolve_types (ns
);
17153 component_assignment_level
= 0;
17154 resolve_codes (ns
);
17156 gfc_current_ns
= old_ns
;
17157 cs_base
= old_cs_base
;
17160 gfc_run_passes (ns
);
17162 if (!ns
->construct_entities
)
17163 gfc_omp_restore_state (&old_omp_state
);