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 /* Since the typebound operators are generic, we have to ensure
6552 that any delays in resolution are corrected and that the vtab
6555 declared
= ts
.u
.derived
;
6556 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6557 if (c
->ts
.u
.derived
== NULL
)
6558 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6560 if (!resolve_compcall (e
, &name
))
6563 /* Use the generic name if it is there. */
6564 name
= name
? name
: e
->value
.function
.esym
->name
;
6565 e
->symtree
= expr
->symtree
;
6566 e
->ref
= gfc_copy_ref (expr
->ref
);
6567 get_declared_from_expr (&class_ref
, NULL
, e
, false);
6569 /* Trim away the extraneous references that emerge from nested
6570 use of interface.c (extend_expr). */
6571 if (class_ref
&& class_ref
->next
)
6573 gfc_free_ref_list (class_ref
->next
);
6574 class_ref
->next
= NULL
;
6576 else if (e
->ref
&& !class_ref
&& expr
->ts
.type
!= BT_CLASS
)
6578 gfc_free_ref_list (e
->ref
);
6582 gfc_add_vptr_component (e
);
6583 gfc_add_component_ref (e
, name
);
6584 e
->value
.function
.esym
= NULL
;
6585 if (expr
->expr_type
!= EXPR_VARIABLE
)
6586 e
->base_expr
= expr
;
6591 return resolve_compcall (e
, NULL
);
6593 if (!resolve_ref (e
))
6596 /* Get the CLASS declared type. */
6597 declared
= get_declared_from_expr (&class_ref
, &new_ref
, e
, true);
6599 if (!resolve_fl_derived (declared
))
6602 /* Weed out cases of the ultimate component being a derived type. */
6603 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6604 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6606 gfc_free_ref_list (new_ref
);
6607 return resolve_compcall (e
, NULL
);
6610 c
= gfc_find_component (declared
, "_data", true, true, NULL
);
6612 /* Treat the call as if it is a typebound procedure, in order to roll
6613 out the correct name for the specific function. */
6614 if (!resolve_compcall (e
, &name
))
6616 gfc_free_ref_list (new_ref
);
6623 /* Convert the expression to a procedure pointer component call. */
6624 e
->value
.function
.esym
= NULL
;
6630 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6631 gfc_add_vptr_component (e
);
6632 gfc_add_component_ref (e
, name
);
6634 /* Recover the typespec for the expression. This is really only
6635 necessary for generic procedures, where the additional call
6636 to gfc_add_component_ref seems to throw the collection of the
6637 correct typespec. */
6641 gfc_free_ref_list (new_ref
);
6646 /* Resolve a typebound subroutine, or 'method'. First separate all
6647 the non-CLASS references by calling resolve_typebound_call
6651 resolve_typebound_subroutine (gfc_code
*code
)
6653 gfc_symbol
*declared
;
6663 st
= code
->expr1
->symtree
;
6665 /* Deal with typebound operators for CLASS objects. */
6666 expr
= code
->expr1
->value
.compcall
.base_object
;
6667 overridable
= !code
->expr1
->value
.compcall
.tbp
->non_overridable
;
6668 if (expr
&& expr
->ts
.type
== BT_CLASS
&& code
->expr1
->value
.compcall
.name
)
6670 /* If the base_object is not a variable, the corresponding actual
6671 argument expression must be stored in e->base_expression so
6672 that the corresponding tree temporary can be used as the base
6673 object in gfc_conv_procedure_call. */
6674 if (expr
->expr_type
!= EXPR_VARIABLE
)
6676 gfc_actual_arglist
*args
;
6678 args
= code
->expr1
->value
.function
.actual
;
6679 for (; args
; args
= args
->next
)
6680 if (expr
== args
->expr
)
6684 /* Since the typebound operators are generic, we have to ensure
6685 that any delays in resolution are corrected and that the vtab
6687 declared
= expr
->ts
.u
.derived
;
6688 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6689 if (c
->ts
.u
.derived
== NULL
)
6690 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6692 if (!resolve_typebound_call (code
, &name
, NULL
))
6695 /* Use the generic name if it is there. */
6696 name
= name
? name
: code
->expr1
->value
.function
.esym
->name
;
6697 code
->expr1
->symtree
= expr
->symtree
;
6698 code
->expr1
->ref
= gfc_copy_ref (expr
->ref
);
6700 /* Trim away the extraneous references that emerge from nested
6701 use of interface.c (extend_expr). */
6702 get_declared_from_expr (&class_ref
, NULL
, code
->expr1
, false);
6703 if (class_ref
&& class_ref
->next
)
6705 gfc_free_ref_list (class_ref
->next
);
6706 class_ref
->next
= NULL
;
6708 else if (code
->expr1
->ref
&& !class_ref
)
6710 gfc_free_ref_list (code
->expr1
->ref
);
6711 code
->expr1
->ref
= NULL
;
6714 /* Now use the procedure in the vtable. */
6715 gfc_add_vptr_component (code
->expr1
);
6716 gfc_add_component_ref (code
->expr1
, name
);
6717 code
->expr1
->value
.function
.esym
= NULL
;
6718 if (expr
->expr_type
!= EXPR_VARIABLE
)
6719 code
->expr1
->base_expr
= expr
;
6724 return resolve_typebound_call (code
, NULL
, NULL
);
6726 if (!resolve_ref (code
->expr1
))
6729 /* Get the CLASS declared type. */
6730 get_declared_from_expr (&class_ref
, &new_ref
, code
->expr1
, true);
6732 /* Weed out cases of the ultimate component being a derived type. */
6733 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6734 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6736 gfc_free_ref_list (new_ref
);
6737 return resolve_typebound_call (code
, NULL
, NULL
);
6740 if (!resolve_typebound_call (code
, &name
, &overridable
))
6742 gfc_free_ref_list (new_ref
);
6745 ts
= code
->expr1
->ts
;
6749 /* Convert the expression to a procedure pointer component call. */
6750 code
->expr1
->value
.function
.esym
= NULL
;
6751 code
->expr1
->symtree
= st
;
6754 code
->expr1
->ref
= new_ref
;
6756 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6757 gfc_add_vptr_component (code
->expr1
);
6758 gfc_add_component_ref (code
->expr1
, name
);
6760 /* Recover the typespec for the expression. This is really only
6761 necessary for generic procedures, where the additional call
6762 to gfc_add_component_ref seems to throw the collection of the
6763 correct typespec. */
6764 code
->expr1
->ts
= ts
;
6767 gfc_free_ref_list (new_ref
);
6773 /* Resolve a CALL to a Procedure Pointer Component (Subroutine). */
6776 resolve_ppc_call (gfc_code
* c
)
6778 gfc_component
*comp
;
6780 comp
= gfc_get_proc_ptr_comp (c
->expr1
);
6781 gcc_assert (comp
!= NULL
);
6783 c
->resolved_sym
= c
->expr1
->symtree
->n
.sym
;
6784 c
->expr1
->expr_type
= EXPR_VARIABLE
;
6786 if (!comp
->attr
.subroutine
)
6787 gfc_add_subroutine (&comp
->attr
, comp
->name
, &c
->expr1
->where
);
6789 if (!resolve_ref (c
->expr1
))
6792 if (!update_ppc_arglist (c
->expr1
))
6795 c
->ext
.actual
= c
->expr1
->value
.compcall
.actual
;
6797 if (!resolve_actual_arglist (c
->ext
.actual
, comp
->attr
.proc
,
6798 !(comp
->ts
.interface
6799 && comp
->ts
.interface
->formal
)))
6802 if (!pure_subroutine (comp
->ts
.interface
, comp
->name
, &c
->expr1
->where
))
6805 gfc_ppc_use (comp
, &c
->expr1
->value
.compcall
.actual
, &c
->expr1
->where
);
6811 /* Resolve a Function Call to a Procedure Pointer Component (Function). */
6814 resolve_expr_ppc (gfc_expr
* e
)
6816 gfc_component
*comp
;
6818 comp
= gfc_get_proc_ptr_comp (e
);
6819 gcc_assert (comp
!= NULL
);
6821 /* Convert to EXPR_FUNCTION. */
6822 e
->expr_type
= EXPR_FUNCTION
;
6823 e
->value
.function
.isym
= NULL
;
6824 e
->value
.function
.actual
= e
->value
.compcall
.actual
;
6826 if (comp
->as
!= NULL
)
6827 e
->rank
= comp
->as
->rank
;
6829 if (!comp
->attr
.function
)
6830 gfc_add_function (&comp
->attr
, comp
->name
, &e
->where
);
6832 if (!resolve_ref (e
))
6835 if (!resolve_actual_arglist (e
->value
.function
.actual
, comp
->attr
.proc
,
6836 !(comp
->ts
.interface
6837 && comp
->ts
.interface
->formal
)))
6840 if (!update_ppc_arglist (e
))
6843 if (!check_pure_function(e
))
6846 gfc_ppc_use (comp
, &e
->value
.compcall
.actual
, &e
->where
);
6853 gfc_is_expandable_expr (gfc_expr
*e
)
6855 gfc_constructor
*con
;
6857 if (e
->expr_type
== EXPR_ARRAY
)
6859 /* Traverse the constructor looking for variables that are flavor
6860 parameter. Parameters must be expanded since they are fully used at
6862 con
= gfc_constructor_first (e
->value
.constructor
);
6863 for (; con
; con
= gfc_constructor_next (con
))
6865 if (con
->expr
->expr_type
== EXPR_VARIABLE
6866 && con
->expr
->symtree
6867 && (con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
6868 || con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_VARIABLE
))
6870 if (con
->expr
->expr_type
== EXPR_ARRAY
6871 && gfc_is_expandable_expr (con
->expr
))
6880 /* Sometimes variables in specification expressions of the result
6881 of module procedures in submodules wind up not being the 'real'
6882 dummy. Find this, if possible, in the namespace of the first
6886 fixup_unique_dummy (gfc_expr
*e
)
6888 gfc_symtree
*st
= NULL
;
6889 gfc_symbol
*s
= NULL
;
6891 if (e
->symtree
->n
.sym
->ns
->proc_name
6892 && e
->symtree
->n
.sym
->ns
->proc_name
->formal
)
6893 s
= e
->symtree
->n
.sym
->ns
->proc_name
->formal
->sym
;
6896 st
= gfc_find_symtree (s
->ns
->sym_root
, e
->symtree
->n
.sym
->name
);
6899 && st
->n
.sym
!= NULL
6900 && st
->n
.sym
->attr
.dummy
)
6904 /* Resolve an expression. That is, make sure that types of operands agree
6905 with their operators, intrinsic operators are converted to function calls
6906 for overloaded types and unresolved function references are resolved. */
6909 gfc_resolve_expr (gfc_expr
*e
)
6912 bool inquiry_save
, actual_arg_save
, first_actual_arg_save
;
6914 if (e
== NULL
|| e
->do_not_resolve_again
)
6917 /* inquiry_argument only applies to variables. */
6918 inquiry_save
= inquiry_argument
;
6919 actual_arg_save
= actual_arg
;
6920 first_actual_arg_save
= first_actual_arg
;
6922 if (e
->expr_type
!= EXPR_VARIABLE
)
6924 inquiry_argument
= false;
6926 first_actual_arg
= false;
6928 else if (e
->symtree
!= NULL
6929 && *e
->symtree
->name
== '@'
6930 && e
->symtree
->n
.sym
->attr
.dummy
)
6932 /* Deal with submodule specification expressions that are not
6933 found to be referenced in module.c(read_cleanup). */
6934 fixup_unique_dummy (e
);
6937 switch (e
->expr_type
)
6940 t
= resolve_operator (e
);
6946 if (check_host_association (e
))
6947 t
= resolve_function (e
);
6949 t
= resolve_variable (e
);
6951 if (e
->ts
.type
== BT_CHARACTER
&& e
->ts
.u
.cl
== NULL
&& e
->ref
6952 && e
->ref
->type
!= REF_SUBSTRING
)
6953 gfc_resolve_substring_charlen (e
);
6958 t
= resolve_typebound_function (e
);
6961 case EXPR_SUBSTRING
:
6962 t
= resolve_ref (e
);
6971 t
= resolve_expr_ppc (e
);
6976 if (!resolve_ref (e
))
6979 t
= gfc_resolve_array_constructor (e
);
6980 /* Also try to expand a constructor. */
6983 expression_rank (e
);
6984 if (gfc_is_constant_expr (e
) || gfc_is_expandable_expr (e
))
6985 gfc_expand_constructor (e
, false);
6988 /* This provides the opportunity for the length of constructors with
6989 character valued function elements to propagate the string length
6990 to the expression. */
6991 if (t
&& e
->ts
.type
== BT_CHARACTER
)
6993 /* For efficiency, we call gfc_expand_constructor for BT_CHARACTER
6994 here rather then add a duplicate test for it above. */
6995 gfc_expand_constructor (e
, false);
6996 t
= gfc_resolve_character_array_constructor (e
);
7001 case EXPR_STRUCTURE
:
7002 t
= resolve_ref (e
);
7006 t
= resolve_structure_cons (e
, 0);
7010 t
= gfc_simplify_expr (e
, 0);
7014 gfc_internal_error ("gfc_resolve_expr(): Bad expression type");
7017 if (e
->ts
.type
== BT_CHARACTER
&& t
&& !e
->ts
.u
.cl
)
7020 inquiry_argument
= inquiry_save
;
7021 actual_arg
= actual_arg_save
;
7022 first_actual_arg
= first_actual_arg_save
;
7024 /* For some reason, resolving these expressions a second time mangles
7025 the typespec of the expression itself. */
7026 if (t
&& e
->expr_type
== EXPR_VARIABLE
7027 && e
->symtree
->n
.sym
->attr
.select_rank_temporary
7028 && UNLIMITED_POLY (e
->symtree
->n
.sym
))
7029 e
->do_not_resolve_again
= 1;
7035 /* Resolve an expression from an iterator. They must be scalar and have
7036 INTEGER or (optionally) REAL type. */
7039 gfc_resolve_iterator_expr (gfc_expr
*expr
, bool real_ok
,
7040 const char *name_msgid
)
7042 if (!gfc_resolve_expr (expr
))
7045 if (expr
->rank
!= 0)
7047 gfc_error ("%s at %L must be a scalar", _(name_msgid
), &expr
->where
);
7051 if (expr
->ts
.type
!= BT_INTEGER
)
7053 if (expr
->ts
.type
== BT_REAL
)
7056 return gfc_notify_std (GFC_STD_F95_DEL
,
7057 "%s at %L must be integer",
7058 _(name_msgid
), &expr
->where
);
7061 gfc_error ("%s at %L must be INTEGER", _(name_msgid
),
7068 gfc_error ("%s at %L must be INTEGER", _(name_msgid
), &expr
->where
);
7076 /* Resolve the expressions in an iterator structure. If REAL_OK is
7077 false allow only INTEGER type iterators, otherwise allow REAL types.
7078 Set own_scope to true for ac-implied-do and data-implied-do as those
7079 have a separate scope such that, e.g., a INTENT(IN) doesn't apply. */
7082 gfc_resolve_iterator (gfc_iterator
*iter
, bool real_ok
, bool own_scope
)
7084 if (!gfc_resolve_iterator_expr (iter
->var
, real_ok
, "Loop variable"))
7087 if (!gfc_check_vardef_context (iter
->var
, false, false, own_scope
,
7088 _("iterator variable")))
7091 if (!gfc_resolve_iterator_expr (iter
->start
, real_ok
,
7092 "Start expression in DO loop"))
7095 if (!gfc_resolve_iterator_expr (iter
->end
, real_ok
,
7096 "End expression in DO loop"))
7099 if (!gfc_resolve_iterator_expr (iter
->step
, real_ok
,
7100 "Step expression in DO loop"))
7103 /* Convert start, end, and step to the same type as var. */
7104 if (iter
->start
->ts
.kind
!= iter
->var
->ts
.kind
7105 || iter
->start
->ts
.type
!= iter
->var
->ts
.type
)
7106 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7108 if (iter
->end
->ts
.kind
!= iter
->var
->ts
.kind
7109 || iter
->end
->ts
.type
!= iter
->var
->ts
.type
)
7110 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7112 if (iter
->step
->ts
.kind
!= iter
->var
->ts
.kind
7113 || iter
->step
->ts
.type
!= iter
->var
->ts
.type
)
7114 gfc_convert_type (iter
->step
, &iter
->var
->ts
, 1);
7116 if (iter
->step
->expr_type
== EXPR_CONSTANT
)
7118 if ((iter
->step
->ts
.type
== BT_INTEGER
7119 && mpz_cmp_ui (iter
->step
->value
.integer
, 0) == 0)
7120 || (iter
->step
->ts
.type
== BT_REAL
7121 && mpfr_sgn (iter
->step
->value
.real
) == 0))
7123 gfc_error ("Step expression in DO loop at %L cannot be zero",
7124 &iter
->step
->where
);
7129 if (iter
->start
->expr_type
== EXPR_CONSTANT
7130 && iter
->end
->expr_type
== EXPR_CONSTANT
7131 && iter
->step
->expr_type
== EXPR_CONSTANT
)
7134 if (iter
->start
->ts
.type
== BT_INTEGER
)
7136 sgn
= mpz_cmp_ui (iter
->step
->value
.integer
, 0);
7137 cmp
= mpz_cmp (iter
->end
->value
.integer
, iter
->start
->value
.integer
);
7141 sgn
= mpfr_sgn (iter
->step
->value
.real
);
7142 cmp
= mpfr_cmp (iter
->end
->value
.real
, iter
->start
->value
.real
);
7144 if (warn_zerotrip
&& ((sgn
> 0 && cmp
< 0) || (sgn
< 0 && cmp
> 0)))
7145 gfc_warning (OPT_Wzerotrip
,
7146 "DO loop at %L will be executed zero times",
7147 &iter
->step
->where
);
7150 if (iter
->end
->expr_type
== EXPR_CONSTANT
7151 && iter
->end
->ts
.type
== BT_INTEGER
7152 && iter
->step
->expr_type
== EXPR_CONSTANT
7153 && iter
->step
->ts
.type
== BT_INTEGER
7154 && (mpz_cmp_si (iter
->step
->value
.integer
, -1L) == 0
7155 || mpz_cmp_si (iter
->step
->value
.integer
, 1L) == 0))
7157 bool is_step_positive
= mpz_cmp_ui (iter
->step
->value
.integer
, 1) == 0;
7158 int k
= gfc_validate_kind (BT_INTEGER
, iter
->end
->ts
.kind
, false);
7160 if (is_step_positive
7161 && mpz_cmp (iter
->end
->value
.integer
, gfc_integer_kinds
[k
].huge
) == 0)
7162 gfc_warning (OPT_Wundefined_do_loop
,
7163 "DO loop at %L is undefined as it overflows",
7164 &iter
->step
->where
);
7165 else if (!is_step_positive
7166 && mpz_cmp (iter
->end
->value
.integer
,
7167 gfc_integer_kinds
[k
].min_int
) == 0)
7168 gfc_warning (OPT_Wundefined_do_loop
,
7169 "DO loop at %L is undefined as it underflows",
7170 &iter
->step
->where
);
7177 /* Traversal function for find_forall_index. f == 2 signals that
7178 that variable itself is not to be checked - only the references. */
7181 forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int *f
)
7183 if (expr
->expr_type
!= EXPR_VARIABLE
)
7186 /* A scalar assignment */
7187 if (!expr
->ref
|| *f
== 1)
7189 if (expr
->symtree
->n
.sym
== sym
)
7201 /* Check whether the FORALL index appears in the expression or not.
7202 Returns true if SYM is found in EXPR. */
7205 find_forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int f
)
7207 if (gfc_traverse_expr (expr
, sym
, forall_index
, f
))
7214 /* Resolve a list of FORALL iterators. The FORALL index-name is constrained
7215 to be a scalar INTEGER variable. The subscripts and stride are scalar
7216 INTEGERs, and if stride is a constant it must be nonzero.
7217 Furthermore "A subscript or stride in a forall-triplet-spec shall
7218 not contain a reference to any index-name in the
7219 forall-triplet-spec-list in which it appears." (7.5.4.1) */
7222 resolve_forall_iterators (gfc_forall_iterator
*it
)
7224 gfc_forall_iterator
*iter
, *iter2
;
7226 for (iter
= it
; iter
; iter
= iter
->next
)
7228 if (gfc_resolve_expr (iter
->var
)
7229 && (iter
->var
->ts
.type
!= BT_INTEGER
|| iter
->var
->rank
!= 0))
7230 gfc_error ("FORALL index-name at %L must be a scalar INTEGER",
7233 if (gfc_resolve_expr (iter
->start
)
7234 && (iter
->start
->ts
.type
!= BT_INTEGER
|| iter
->start
->rank
!= 0))
7235 gfc_error ("FORALL start expression at %L must be a scalar INTEGER",
7236 &iter
->start
->where
);
7237 if (iter
->var
->ts
.kind
!= iter
->start
->ts
.kind
)
7238 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7240 if (gfc_resolve_expr (iter
->end
)
7241 && (iter
->end
->ts
.type
!= BT_INTEGER
|| iter
->end
->rank
!= 0))
7242 gfc_error ("FORALL end expression at %L must be a scalar INTEGER",
7244 if (iter
->var
->ts
.kind
!= iter
->end
->ts
.kind
)
7245 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7247 if (gfc_resolve_expr (iter
->stride
))
7249 if (iter
->stride
->ts
.type
!= BT_INTEGER
|| iter
->stride
->rank
!= 0)
7250 gfc_error ("FORALL stride expression at %L must be a scalar %s",
7251 &iter
->stride
->where
, "INTEGER");
7253 if (iter
->stride
->expr_type
== EXPR_CONSTANT
7254 && mpz_cmp_ui (iter
->stride
->value
.integer
, 0) == 0)
7255 gfc_error ("FORALL stride expression at %L cannot be zero",
7256 &iter
->stride
->where
);
7258 if (iter
->var
->ts
.kind
!= iter
->stride
->ts
.kind
)
7259 gfc_convert_type (iter
->stride
, &iter
->var
->ts
, 1);
7262 for (iter
= it
; iter
; iter
= iter
->next
)
7263 for (iter2
= iter
; iter2
; iter2
= iter2
->next
)
7265 if (find_forall_index (iter2
->start
, iter
->var
->symtree
->n
.sym
, 0)
7266 || find_forall_index (iter2
->end
, iter
->var
->symtree
->n
.sym
, 0)
7267 || find_forall_index (iter2
->stride
, iter
->var
->symtree
->n
.sym
, 0))
7268 gfc_error ("FORALL index %qs may not appear in triplet "
7269 "specification at %L", iter
->var
->symtree
->name
,
7270 &iter2
->start
->where
);
7275 /* Given a pointer to a symbol that is a derived type, see if it's
7276 inaccessible, i.e. if it's defined in another module and the components are
7277 PRIVATE. The search is recursive if necessary. Returns zero if no
7278 inaccessible components are found, nonzero otherwise. */
7281 derived_inaccessible (gfc_symbol
*sym
)
7285 if (sym
->attr
.use_assoc
&& sym
->attr
.private_comp
)
7288 for (c
= sym
->components
; c
; c
= c
->next
)
7290 /* Prevent an infinite loop through this function. */
7291 if (c
->ts
.type
== BT_DERIVED
&& c
->attr
.pointer
7292 && sym
== c
->ts
.u
.derived
)
7295 if (c
->ts
.type
== BT_DERIVED
&& derived_inaccessible (c
->ts
.u
.derived
))
7303 /* Resolve the argument of a deallocate expression. The expression must be
7304 a pointer or a full array. */
7307 resolve_deallocate_expr (gfc_expr
*e
)
7309 symbol_attribute attr
;
7310 int allocatable
, pointer
;
7316 if (!gfc_resolve_expr (e
))
7319 if (e
->expr_type
!= EXPR_VARIABLE
)
7322 sym
= e
->symtree
->n
.sym
;
7323 unlimited
= UNLIMITED_POLY(sym
);
7325 if (sym
->ts
.type
== BT_CLASS
)
7327 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7328 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7332 allocatable
= sym
->attr
.allocatable
;
7333 pointer
= sym
->attr
.pointer
;
7335 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7340 if (ref
->u
.ar
.type
!= AR_FULL
7341 && !(ref
->u
.ar
.type
== AR_ELEMENT
&& ref
->u
.ar
.as
->rank
== 0
7342 && ref
->u
.ar
.codimen
&& gfc_ref_this_image (ref
)))
7347 c
= ref
->u
.c
.component
;
7348 if (c
->ts
.type
== BT_CLASS
)
7350 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7351 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7355 allocatable
= c
->attr
.allocatable
;
7356 pointer
= c
->attr
.pointer
;
7367 attr
= gfc_expr_attr (e
);
7369 if (allocatable
== 0 && attr
.pointer
== 0 && !unlimited
)
7372 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7378 if (gfc_is_coindexed (e
))
7380 gfc_error ("Coindexed allocatable object at %L", &e
->where
);
7385 && !gfc_check_vardef_context (e
, true, true, false,
7386 _("DEALLOCATE object")))
7388 if (!gfc_check_vardef_context (e
, false, true, false,
7389 _("DEALLOCATE object")))
7396 /* Returns true if the expression e contains a reference to the symbol sym. */
7398 sym_in_expr (gfc_expr
*e
, gfc_symbol
*sym
, int *f ATTRIBUTE_UNUSED
)
7400 if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
== sym
)
7407 gfc_find_sym_in_expr (gfc_symbol
*sym
, gfc_expr
*e
)
7409 return gfc_traverse_expr (e
, sym
, sym_in_expr
, 0);
7413 /* Given the expression node e for an allocatable/pointer of derived type to be
7414 allocated, get the expression node to be initialized afterwards (needed for
7415 derived types with default initializers, and derived types with allocatable
7416 components that need nullification.) */
7419 gfc_expr_to_initialize (gfc_expr
*e
)
7425 result
= gfc_copy_expr (e
);
7427 /* Change the last array reference from AR_ELEMENT to AR_FULL. */
7428 for (ref
= result
->ref
; ref
; ref
= ref
->next
)
7429 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
7431 if (ref
->u
.ar
.dimen
== 0
7432 && ref
->u
.ar
.as
&& ref
->u
.ar
.as
->corank
)
7435 ref
->u
.ar
.type
= AR_FULL
;
7437 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
7438 ref
->u
.ar
.start
[i
] = ref
->u
.ar
.end
[i
] = ref
->u
.ar
.stride
[i
] = NULL
;
7443 gfc_free_shape (&result
->shape
, result
->rank
);
7445 /* Recalculate rank, shape, etc. */
7446 gfc_resolve_expr (result
);
7451 /* If the last ref of an expression is an array ref, return a copy of the
7452 expression with that one removed. Otherwise, a copy of the original
7453 expression. This is used for allocate-expressions and pointer assignment
7454 LHS, where there may be an array specification that needs to be stripped
7455 off when using gfc_check_vardef_context. */
7458 remove_last_array_ref (gfc_expr
* e
)
7463 e2
= gfc_copy_expr (e
);
7464 for (r
= &e2
->ref
; *r
; r
= &(*r
)->next
)
7465 if ((*r
)->type
== REF_ARRAY
&& !(*r
)->next
)
7467 gfc_free_ref_list (*r
);
7476 /* Used in resolve_allocate_expr to check that a allocation-object and
7477 a source-expr are conformable. This does not catch all possible
7478 cases; in particular a runtime checking is needed. */
7481 conformable_arrays (gfc_expr
*e1
, gfc_expr
*e2
)
7484 for (tail
= e2
->ref
; tail
&& tail
->next
; tail
= tail
->next
);
7486 /* First compare rank. */
7487 if ((tail
&& (!tail
->u
.ar
.as
|| e1
->rank
!= tail
->u
.ar
.as
->rank
))
7488 || (!tail
&& e1
->rank
!= e2
->rank
))
7490 gfc_error ("Source-expr at %L must be scalar or have the "
7491 "same rank as the allocate-object at %L",
7492 &e1
->where
, &e2
->where
);
7503 for (i
= 0; i
< e1
->rank
; i
++)
7505 if (tail
->u
.ar
.start
[i
] == NULL
)
7508 if (tail
->u
.ar
.end
[i
])
7510 mpz_set (s
, tail
->u
.ar
.end
[i
]->value
.integer
);
7511 mpz_sub (s
, s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7512 mpz_add_ui (s
, s
, 1);
7516 mpz_set (s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7519 if (mpz_cmp (e1
->shape
[i
], s
) != 0)
7521 gfc_error ("Source-expr at %L and allocate-object at %L must "
7522 "have the same shape", &e1
->where
, &e2
->where
);
7535 /* Resolve the expression in an ALLOCATE statement, doing the additional
7536 checks to see whether the expression is OK or not. The expression must
7537 have a trailing array reference that gives the size of the array. */
7540 resolve_allocate_expr (gfc_expr
*e
, gfc_code
*code
, bool *array_alloc_wo_spec
)
7542 int i
, pointer
, allocatable
, dimension
, is_abstract
;
7546 symbol_attribute attr
;
7547 gfc_ref
*ref
, *ref2
;
7550 gfc_symbol
*sym
= NULL
;
7555 /* Mark the utmost array component as being in allocate to allow DIMEN_STAR
7556 checking of coarrays. */
7557 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7558 if (ref
->next
== NULL
)
7561 if (ref
&& ref
->type
== REF_ARRAY
)
7562 ref
->u
.ar
.in_allocate
= true;
7564 if (!gfc_resolve_expr (e
))
7567 /* Make sure the expression is allocatable or a pointer. If it is
7568 pointer, the next-to-last reference must be a pointer. */
7572 sym
= e
->symtree
->n
.sym
;
7574 /* Check whether ultimate component is abstract and CLASS. */
7577 /* Is the allocate-object unlimited polymorphic? */
7578 unlimited
= UNLIMITED_POLY(e
);
7580 if (e
->expr_type
!= EXPR_VARIABLE
)
7583 attr
= gfc_expr_attr (e
);
7584 pointer
= attr
.pointer
;
7585 dimension
= attr
.dimension
;
7586 codimension
= attr
.codimension
;
7590 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
))
7592 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7593 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7594 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
7595 codimension
= CLASS_DATA (sym
)->attr
.codimension
;
7596 is_abstract
= CLASS_DATA (sym
)->attr
.abstract
;
7600 allocatable
= sym
->attr
.allocatable
;
7601 pointer
= sym
->attr
.pointer
;
7602 dimension
= sym
->attr
.dimension
;
7603 codimension
= sym
->attr
.codimension
;
7608 for (ref
= e
->ref
; ref
; ref2
= ref
, ref
= ref
->next
)
7613 if (ref
->u
.ar
.codimen
> 0)
7616 for (n
= ref
->u
.ar
.dimen
;
7617 n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
7618 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_THIS_IMAGE
)
7625 if (ref
->next
!= NULL
)
7633 gfc_error ("Coindexed allocatable object at %L",
7638 c
= ref
->u
.c
.component
;
7639 if (c
->ts
.type
== BT_CLASS
)
7641 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7642 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7643 dimension
= CLASS_DATA (c
)->attr
.dimension
;
7644 codimension
= CLASS_DATA (c
)->attr
.codimension
;
7645 is_abstract
= CLASS_DATA (c
)->attr
.abstract
;
7649 allocatable
= c
->attr
.allocatable
;
7650 pointer
= c
->attr
.pointer
;
7651 dimension
= c
->attr
.dimension
;
7652 codimension
= c
->attr
.codimension
;
7653 is_abstract
= c
->attr
.abstract
;
7666 /* Check for F08:C628. */
7667 if (allocatable
== 0 && pointer
== 0 && !unlimited
)
7669 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7674 /* Some checks for the SOURCE tag. */
7677 /* Check F03:C631. */
7678 if (!gfc_type_compatible (&e
->ts
, &code
->expr3
->ts
))
7680 gfc_error ("Type of entity at %L is type incompatible with "
7681 "source-expr at %L", &e
->where
, &code
->expr3
->where
);
7685 /* Check F03:C632 and restriction following Note 6.18. */
7686 if (code
->expr3
->rank
> 0 && !conformable_arrays (code
->expr3
, e
))
7689 /* Check F03:C633. */
7690 if (code
->expr3
->ts
.kind
!= e
->ts
.kind
&& !unlimited
)
7692 gfc_error ("The allocate-object at %L and the source-expr at %L "
7693 "shall have the same kind type parameter",
7694 &e
->where
, &code
->expr3
->where
);
7698 /* Check F2008, C642. */
7699 if (code
->expr3
->ts
.type
== BT_DERIVED
7700 && ((codimension
&& gfc_expr_attr (code
->expr3
).lock_comp
)
7701 || (code
->expr3
->ts
.u
.derived
->from_intmod
7702 == INTMOD_ISO_FORTRAN_ENV
7703 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7704 == ISOFORTRAN_LOCK_TYPE
)))
7706 gfc_error ("The source-expr at %L shall neither be of type "
7707 "LOCK_TYPE nor have a LOCK_TYPE component if "
7708 "allocate-object at %L is a coarray",
7709 &code
->expr3
->where
, &e
->where
);
7713 /* Check TS18508, C702/C703. */
7714 if (code
->expr3
->ts
.type
== BT_DERIVED
7715 && ((codimension
&& gfc_expr_attr (code
->expr3
).event_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_EVENT_TYPE
)))
7721 gfc_error ("The source-expr at %L shall neither be of type "
7722 "EVENT_TYPE nor have a EVENT_TYPE component if "
7723 "allocate-object at %L is a coarray",
7724 &code
->expr3
->where
, &e
->where
);
7729 /* Check F08:C629. */
7730 if (is_abstract
&& code
->ext
.alloc
.ts
.type
== BT_UNKNOWN
7733 gcc_assert (e
->ts
.type
== BT_CLASS
);
7734 gfc_error ("Allocating %s of ABSTRACT base type at %L requires a "
7735 "type-spec or source-expr", sym
->name
, &e
->where
);
7739 /* Check F08:C632. */
7740 if (code
->ext
.alloc
.ts
.type
== BT_CHARACTER
&& !e
->ts
.deferred
7741 && !UNLIMITED_POLY (e
))
7745 if (!e
->ts
.u
.cl
->length
)
7748 cmp
= gfc_dep_compare_expr (e
->ts
.u
.cl
->length
,
7749 code
->ext
.alloc
.ts
.u
.cl
->length
);
7750 if (cmp
== 1 || cmp
== -1 || cmp
== -3)
7752 gfc_error ("Allocating %s at %L with type-spec requires the same "
7753 "character-length parameter as in the declaration",
7754 sym
->name
, &e
->where
);
7759 /* In the variable definition context checks, gfc_expr_attr is used
7760 on the expression. This is fooled by the array specification
7761 present in e, thus we have to eliminate that one temporarily. */
7762 e2
= remove_last_array_ref (e
);
7765 t
= gfc_check_vardef_context (e2
, true, true, false,
7766 _("ALLOCATE object"));
7768 t
= gfc_check_vardef_context (e2
, false, true, false,
7769 _("ALLOCATE object"));
7774 if (e
->ts
.type
== BT_CLASS
&& CLASS_DATA (e
)->attr
.dimension
7775 && !code
->expr3
&& code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7777 /* For class arrays, the initialization with SOURCE is done
7778 using _copy and trans_call. It is convenient to exploit that
7779 when the allocated type is different from the declared type but
7780 no SOURCE exists by setting expr3. */
7781 code
->expr3
= gfc_default_initializer (&code
->ext
.alloc
.ts
);
7783 else if (flag_coarray
!= GFC_FCOARRAY_LIB
&& e
->ts
.type
== BT_DERIVED
7784 && e
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
7785 && e
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
7787 /* We have to zero initialize the integer variable. */
7788 code
->expr3
= gfc_get_int_expr (gfc_default_integer_kind
, &e
->where
, 0);
7791 if (e
->ts
.type
== BT_CLASS
&& !unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7793 /* Make sure the vtab symbol is present when
7794 the module variables are generated. */
7795 gfc_typespec ts
= e
->ts
;
7797 ts
= code
->expr3
->ts
;
7798 else if (code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7799 ts
= code
->ext
.alloc
.ts
;
7801 /* Finding the vtab also publishes the type's symbol. Therefore this
7802 statement is necessary. */
7803 gfc_find_derived_vtab (ts
.u
.derived
);
7805 else if (unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7807 /* Again, make sure the vtab symbol is present when
7808 the module variables are generated. */
7809 gfc_typespec
*ts
= NULL
;
7811 ts
= &code
->expr3
->ts
;
7813 ts
= &code
->ext
.alloc
.ts
;
7817 /* Finding the vtab also publishes the type's symbol. Therefore this
7818 statement is necessary. */
7822 if (dimension
== 0 && codimension
== 0)
7825 /* Make sure the last reference node is an array specification. */
7827 if (!ref2
|| ref2
->type
!= REF_ARRAY
|| ref2
->u
.ar
.type
== AR_FULL
7828 || (dimension
&& ref2
->u
.ar
.dimen
== 0))
7833 if (!gfc_notify_std (GFC_STD_F2008
, "Array specification required "
7834 "in ALLOCATE statement at %L", &e
->where
))
7836 if (code
->expr3
->rank
!= 0)
7837 *array_alloc_wo_spec
= true;
7840 gfc_error ("Array specification or array-valued SOURCE= "
7841 "expression required in ALLOCATE statement at %L",
7848 gfc_error ("Array specification required in ALLOCATE statement "
7849 "at %L", &e
->where
);
7854 /* Make sure that the array section reference makes sense in the
7855 context of an ALLOCATE specification. */
7860 for (i
= ar
->dimen
; i
< ar
->dimen
+ ar
->codimen
; i
++)
7862 switch (ar
->dimen_type
[i
])
7864 case DIMEN_THIS_IMAGE
:
7865 gfc_error ("Coarray specification required in ALLOCATE statement "
7866 "at %L", &e
->where
);
7870 if (ar
->start
[i
] == 0 || ar
->end
[i
] == 0)
7872 /* If ar->stride[i] is NULL, we issued a previous error. */
7873 if (ar
->stride
[i
] == NULL
)
7874 gfc_error ("Bad array specification in ALLOCATE statement "
7875 "at %L", &e
->where
);
7878 else if (gfc_dep_compare_expr (ar
->start
[i
], ar
->end
[i
]) == 1)
7880 gfc_error ("Upper cobound is less than lower cobound at %L",
7881 &ar
->start
[i
]->where
);
7887 if (ar
->start
[i
]->expr_type
== EXPR_CONSTANT
)
7889 gcc_assert (ar
->start
[i
]->ts
.type
== BT_INTEGER
);
7890 if (mpz_cmp_si (ar
->start
[i
]->value
.integer
, 1) < 0)
7892 gfc_error ("Upper cobound is less than lower cobound "
7893 "of 1 at %L", &ar
->start
[i
]->where
);
7903 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7909 for (i
= 0; i
< ar
->dimen
; i
++)
7911 if (ar
->type
== AR_ELEMENT
|| ar
->type
== AR_FULL
)
7914 switch (ar
->dimen_type
[i
])
7920 if (ar
->start
[i
] != NULL
7921 && ar
->end
[i
] != NULL
7922 && ar
->stride
[i
] == NULL
)
7930 case DIMEN_THIS_IMAGE
:
7931 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7937 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7939 sym
= a
->expr
->symtree
->n
.sym
;
7941 /* TODO - check derived type components. */
7942 if (gfc_bt_struct (sym
->ts
.type
) || sym
->ts
.type
== BT_CLASS
)
7945 if ((ar
->start
[i
] != NULL
7946 && gfc_find_sym_in_expr (sym
, ar
->start
[i
]))
7947 || (ar
->end
[i
] != NULL
7948 && gfc_find_sym_in_expr (sym
, ar
->end
[i
])))
7950 gfc_error ("%qs must not appear in the array specification at "
7951 "%L in the same ALLOCATE statement where it is "
7952 "itself allocated", sym
->name
, &ar
->where
);
7958 for (i
= ar
->dimen
; i
< ar
->codimen
+ ar
->dimen
; i
++)
7960 if (ar
->dimen_type
[i
] == DIMEN_ELEMENT
7961 || ar
->dimen_type
[i
] == DIMEN_RANGE
)
7963 if (i
== (ar
->dimen
+ ar
->codimen
- 1))
7965 gfc_error ("Expected '*' in coindex specification in ALLOCATE "
7966 "statement at %L", &e
->where
);
7972 if (ar
->dimen_type
[i
] == DIMEN_STAR
&& i
== (ar
->dimen
+ ar
->codimen
- 1)
7973 && ar
->stride
[i
] == NULL
)
7976 gfc_error ("Bad coarray specification in ALLOCATE statement at %L",
7990 resolve_allocate_deallocate (gfc_code
*code
, const char *fcn
)
7992 gfc_expr
*stat
, *errmsg
, *pe
, *qe
;
7993 gfc_alloc
*a
, *p
, *q
;
7996 errmsg
= code
->expr2
;
7998 /* Check the stat variable. */
8001 gfc_check_vardef_context (stat
, false, false, false,
8002 _("STAT variable"));
8004 if ((stat
->ts
.type
!= BT_INTEGER
8005 && !(stat
->ref
&& (stat
->ref
->type
== REF_ARRAY
8006 || stat
->ref
->type
== REF_COMPONENT
)))
8008 gfc_error ("Stat-variable at %L must be a scalar INTEGER "
8009 "variable", &stat
->where
);
8011 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
8012 if (p
->expr
->symtree
->n
.sym
->name
== stat
->symtree
->n
.sym
->name
)
8014 gfc_ref
*ref1
, *ref2
;
8017 for (ref1
= p
->expr
->ref
, ref2
= stat
->ref
; ref1
&& ref2
;
8018 ref1
= ref1
->next
, ref2
= ref2
->next
)
8020 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
8022 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
8031 gfc_error ("Stat-variable at %L shall not be %sd within "
8032 "the same %s statement", &stat
->where
, fcn
, fcn
);
8038 /* Check the errmsg variable. */
8042 gfc_warning (0, "ERRMSG at %L is useless without a STAT tag",
8045 gfc_check_vardef_context (errmsg
, false, false, false,
8046 _("ERRMSG variable"));
8048 /* F18:R928 alloc-opt is ERRMSG = errmsg-variable
8049 F18:R930 errmsg-variable is scalar-default-char-variable
8050 F18:R906 default-char-variable is variable
8051 F18:C906 default-char-variable shall be default character. */
8052 if ((errmsg
->ts
.type
!= BT_CHARACTER
8054 && (errmsg
->ref
->type
== REF_ARRAY
8055 || errmsg
->ref
->type
== REF_COMPONENT
)))
8057 || errmsg
->ts
.kind
!= gfc_default_character_kind
)
8058 gfc_error ("ERRMSG variable at %L shall be a scalar default CHARACTER "
8059 "variable", &errmsg
->where
);
8061 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
8062 if (p
->expr
->symtree
->n
.sym
->name
== errmsg
->symtree
->n
.sym
->name
)
8064 gfc_ref
*ref1
, *ref2
;
8067 for (ref1
= p
->expr
->ref
, ref2
= errmsg
->ref
; ref1
&& ref2
;
8068 ref1
= ref1
->next
, ref2
= ref2
->next
)
8070 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
8072 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
8081 gfc_error ("Errmsg-variable at %L shall not be %sd within "
8082 "the same %s statement", &errmsg
->where
, fcn
, fcn
);
8088 /* Check that an allocate-object appears only once in the statement. */
8090 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
8093 for (q
= p
->next
; q
; q
= q
->next
)
8096 if (pe
->symtree
->n
.sym
->name
== qe
->symtree
->n
.sym
->name
)
8098 /* This is a potential collision. */
8099 gfc_ref
*pr
= pe
->ref
;
8100 gfc_ref
*qr
= qe
->ref
;
8102 /* Follow the references until
8103 a) They start to differ, in which case there is no error;
8104 you can deallocate a%b and a%c in a single statement
8105 b) Both of them stop, which is an error
8106 c) One of them stops, which is also an error. */
8109 if (pr
== NULL
&& qr
== NULL
)
8111 gfc_error ("Allocate-object at %L also appears at %L",
8112 &pe
->where
, &qe
->where
);
8115 else if (pr
!= NULL
&& qr
== NULL
)
8117 gfc_error ("Allocate-object at %L is subobject of"
8118 " object at %L", &pe
->where
, &qe
->where
);
8121 else if (pr
== NULL
&& qr
!= NULL
)
8123 gfc_error ("Allocate-object at %L is subobject of"
8124 " object at %L", &qe
->where
, &pe
->where
);
8127 /* Here, pr != NULL && qr != NULL */
8128 gcc_assert(pr
->type
== qr
->type
);
8129 if (pr
->type
== REF_ARRAY
)
8131 /* Handle cases like allocate(v(3)%x(3), v(2)%x(3)),
8133 gcc_assert (qr
->type
== REF_ARRAY
);
8135 if (pr
->next
&& qr
->next
)
8138 gfc_array_ref
*par
= &(pr
->u
.ar
);
8139 gfc_array_ref
*qar
= &(qr
->u
.ar
);
8141 for (i
=0; i
<par
->dimen
; i
++)
8143 if ((par
->start
[i
] != NULL
8144 || qar
->start
[i
] != NULL
)
8145 && gfc_dep_compare_expr (par
->start
[i
],
8146 qar
->start
[i
]) != 0)
8153 if (pr
->u
.c
.component
->name
!= qr
->u
.c
.component
->name
)
8166 if (strcmp (fcn
, "ALLOCATE") == 0)
8168 bool arr_alloc_wo_spec
= false;
8170 /* Resolving the expr3 in the loop over all objects to allocate would
8171 execute loop invariant code for each loop item. Therefore do it just
8173 if (code
->expr3
&& code
->expr3
->mold
8174 && code
->expr3
->ts
.type
== BT_DERIVED
)
8176 /* Default initialization via MOLD (non-polymorphic). */
8177 gfc_expr
*rhs
= gfc_default_initializer (&code
->expr3
->ts
);
8180 gfc_resolve_expr (rhs
);
8181 gfc_free_expr (code
->expr3
);
8185 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8186 resolve_allocate_expr (a
->expr
, code
, &arr_alloc_wo_spec
);
8188 if (arr_alloc_wo_spec
&& code
->expr3
)
8190 /* Mark the allocate to have to take the array specification
8192 code
->ext
.alloc
.arr_spec_from_expr3
= 1;
8197 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8198 resolve_deallocate_expr (a
->expr
);
8203 /************ SELECT CASE resolution subroutines ************/
8205 /* Callback function for our mergesort variant. Determines interval
8206 overlaps for CASEs. Return <0 if op1 < op2, 0 for overlap, >0 for
8207 op1 > op2. Assumes we're not dealing with the default case.
8208 We have op1 = (:L), (K:L) or (K:) and op2 = (:N), (M:N) or (M:).
8209 There are nine situations to check. */
8212 compare_cases (const gfc_case
*op1
, const gfc_case
*op2
)
8216 if (op1
->low
== NULL
) /* op1 = (:L) */
8218 /* op2 = (:N), so overlap. */
8220 /* op2 = (M:) or (M:N), L < M */
8221 if (op2
->low
!= NULL
8222 && gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8225 else if (op1
->high
== NULL
) /* op1 = (K:) */
8227 /* op2 = (M:), so overlap. */
8229 /* op2 = (:N) or (M:N), K > N */
8230 if (op2
->high
!= NULL
8231 && gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8234 else /* op1 = (K:L) */
8236 if (op2
->low
== NULL
) /* op2 = (:N), K > N */
8237 retval
= (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8239 else if (op2
->high
== NULL
) /* op2 = (M:), L < M */
8240 retval
= (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8242 else /* op2 = (M:N) */
8246 if (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8249 else if (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8258 /* Merge-sort a double linked case list, detecting overlap in the
8259 process. LIST is the head of the double linked case list before it
8260 is sorted. Returns the head of the sorted list if we don't see any
8261 overlap, or NULL otherwise. */
8264 check_case_overlap (gfc_case
*list
)
8266 gfc_case
*p
, *q
, *e
, *tail
;
8267 int insize
, nmerges
, psize
, qsize
, cmp
, overlap_seen
;
8269 /* If the passed list was empty, return immediately. */
8276 /* Loop unconditionally. The only exit from this loop is a return
8277 statement, when we've finished sorting the case list. */
8284 /* Count the number of merges we do in this pass. */
8287 /* Loop while there exists a merge to be done. */
8292 /* Count this merge. */
8295 /* Cut the list in two pieces by stepping INSIZE places
8296 forward in the list, starting from P. */
8299 for (i
= 0; i
< insize
; i
++)
8308 /* Now we have two lists. Merge them! */
8309 while (psize
> 0 || (qsize
> 0 && q
!= NULL
))
8311 /* See from which the next case to merge comes from. */
8314 /* P is empty so the next case must come from Q. */
8319 else if (qsize
== 0 || q
== NULL
)
8328 cmp
= compare_cases (p
, q
);
8331 /* The whole case range for P is less than the
8339 /* The whole case range for Q is greater than
8340 the case range for P. */
8347 /* The cases overlap, or they are the same
8348 element in the list. Either way, we must
8349 issue an error and get the next case from P. */
8350 /* FIXME: Sort P and Q by line number. */
8351 gfc_error ("CASE label at %L overlaps with CASE "
8352 "label at %L", &p
->where
, &q
->where
);
8360 /* Add the next element to the merged list. */
8369 /* P has now stepped INSIZE places along, and so has Q. So
8370 they're the same. */
8375 /* If we have done only one merge or none at all, we've
8376 finished sorting the cases. */
8385 /* Otherwise repeat, merging lists twice the size. */
8391 /* Check to see if an expression is suitable for use in a CASE statement.
8392 Makes sure that all case expressions are scalar constants of the same
8393 type. Return false if anything is wrong. */
8396 validate_case_label_expr (gfc_expr
*e
, gfc_expr
*case_expr
)
8398 if (e
== NULL
) return true;
8400 if (e
->ts
.type
!= case_expr
->ts
.type
)
8402 gfc_error ("Expression in CASE statement at %L must be of type %s",
8403 &e
->where
, gfc_basic_typename (case_expr
->ts
.type
));
8407 /* C805 (R808) For a given case-construct, each case-value shall be of
8408 the same type as case-expr. For character type, length differences
8409 are allowed, but the kind type parameters shall be the same. */
8411 if (case_expr
->ts
.type
== BT_CHARACTER
&& e
->ts
.kind
!= case_expr
->ts
.kind
)
8413 gfc_error ("Expression in CASE statement at %L must be of kind %d",
8414 &e
->where
, case_expr
->ts
.kind
);
8418 /* Convert the case value kind to that of case expression kind,
8421 if (e
->ts
.kind
!= case_expr
->ts
.kind
)
8422 gfc_convert_type_warn (e
, &case_expr
->ts
, 2, 0);
8426 gfc_error ("Expression in CASE statement at %L must be scalar",
8435 /* Given a completely parsed select statement, we:
8437 - Validate all expressions and code within the SELECT.
8438 - Make sure that the selection expression is not of the wrong type.
8439 - Make sure that no case ranges overlap.
8440 - Eliminate unreachable cases and unreachable code resulting from
8441 removing case labels.
8443 The standard does allow unreachable cases, e.g. CASE (5:3). But
8444 they are a hassle for code generation, and to prevent that, we just
8445 cut them out here. This is not necessary for overlapping cases
8446 because they are illegal and we never even try to generate code.
8448 We have the additional caveat that a SELECT construct could have
8449 been a computed GOTO in the source code. Fortunately we can fairly
8450 easily work around that here: The case_expr for a "real" SELECT CASE
8451 is in code->expr1, but for a computed GOTO it is in code->expr2. All
8452 we have to do is make sure that the case_expr is a scalar integer
8456 resolve_select (gfc_code
*code
, bool select_type
)
8459 gfc_expr
*case_expr
;
8460 gfc_case
*cp
, *default_case
, *tail
, *head
;
8461 int seen_unreachable
;
8467 if (code
->expr1
== NULL
)
8469 /* This was actually a computed GOTO statement. */
8470 case_expr
= code
->expr2
;
8471 if (case_expr
->ts
.type
!= BT_INTEGER
|| case_expr
->rank
!= 0)
8472 gfc_error ("Selection expression in computed GOTO statement "
8473 "at %L must be a scalar integer expression",
8476 /* Further checking is not necessary because this SELECT was built
8477 by the compiler, so it should always be OK. Just move the
8478 case_expr from expr2 to expr so that we can handle computed
8479 GOTOs as normal SELECTs from here on. */
8480 code
->expr1
= code
->expr2
;
8485 case_expr
= code
->expr1
;
8486 type
= case_expr
->ts
.type
;
8489 if (type
!= BT_LOGICAL
&& type
!= BT_INTEGER
&& type
!= BT_CHARACTER
)
8491 gfc_error ("Argument of SELECT statement at %L cannot be %s",
8492 &case_expr
->where
, gfc_typename (case_expr
));
8494 /* Punt. Going on here just produce more garbage error messages. */
8499 if (!select_type
&& case_expr
->rank
!= 0)
8501 gfc_error ("Argument of SELECT statement at %L must be a scalar "
8502 "expression", &case_expr
->where
);
8508 /* Raise a warning if an INTEGER case value exceeds the range of
8509 the case-expr. Later, all expressions will be promoted to the
8510 largest kind of all case-labels. */
8512 if (type
== BT_INTEGER
)
8513 for (body
= code
->block
; body
; body
= body
->block
)
8514 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8517 && gfc_check_integer_range (cp
->low
->value
.integer
,
8518 case_expr
->ts
.kind
) != ARITH_OK
)
8519 gfc_warning (0, "Expression in CASE statement at %L is "
8520 "not in the range of %s", &cp
->low
->where
,
8521 gfc_typename (case_expr
));
8524 && cp
->low
!= cp
->high
8525 && gfc_check_integer_range (cp
->high
->value
.integer
,
8526 case_expr
->ts
.kind
) != ARITH_OK
)
8527 gfc_warning (0, "Expression in CASE statement at %L is "
8528 "not in the range of %s", &cp
->high
->where
,
8529 gfc_typename (case_expr
));
8532 /* PR 19168 has a long discussion concerning a mismatch of the kinds
8533 of the SELECT CASE expression and its CASE values. Walk the lists
8534 of case values, and if we find a mismatch, promote case_expr to
8535 the appropriate kind. */
8537 if (type
== BT_LOGICAL
|| type
== BT_INTEGER
)
8539 for (body
= code
->block
; body
; body
= body
->block
)
8541 /* Walk the case label list. */
8542 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8544 /* Intercept the DEFAULT case. It does not have a kind. */
8545 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8548 /* Unreachable case ranges are discarded, so ignore. */
8549 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8550 && cp
->low
!= cp
->high
8551 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8555 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->low
))
8556 gfc_convert_type_warn (case_expr
, &cp
->low
->ts
, 2, 0);
8558 if (cp
->high
!= NULL
8559 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->high
))
8560 gfc_convert_type_warn (case_expr
, &cp
->high
->ts
, 2, 0);
8565 /* Assume there is no DEFAULT case. */
8566 default_case
= NULL
;
8571 for (body
= code
->block
; body
; body
= body
->block
)
8573 /* Assume the CASE list is OK, and all CASE labels can be matched. */
8575 seen_unreachable
= 0;
8577 /* Walk the case label list, making sure that all case labels
8579 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8581 /* Count the number of cases in the whole construct. */
8584 /* Intercept the DEFAULT case. */
8585 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8587 if (default_case
!= NULL
)
8589 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8590 "by a second DEFAULT CASE at %L",
8591 &default_case
->where
, &cp
->where
);
8602 /* Deal with single value cases and case ranges. Errors are
8603 issued from the validation function. */
8604 if (!validate_case_label_expr (cp
->low
, case_expr
)
8605 || !validate_case_label_expr (cp
->high
, case_expr
))
8611 if (type
== BT_LOGICAL
8612 && ((cp
->low
== NULL
|| cp
->high
== NULL
)
8613 || cp
->low
!= cp
->high
))
8615 gfc_error ("Logical range in CASE statement at %L is not "
8616 "allowed", &cp
->low
->where
);
8621 if (type
== BT_LOGICAL
&& cp
->low
->expr_type
== EXPR_CONSTANT
)
8624 value
= cp
->low
->value
.logical
== 0 ? 2 : 1;
8625 if (value
& seen_logical
)
8627 gfc_error ("Constant logical value in CASE statement "
8628 "is repeated at %L",
8633 seen_logical
|= value
;
8636 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8637 && cp
->low
!= cp
->high
8638 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8640 if (warn_surprising
)
8641 gfc_warning (OPT_Wsurprising
,
8642 "Range specification at %L can never be matched",
8645 cp
->unreachable
= 1;
8646 seen_unreachable
= 1;
8650 /* If the case range can be matched, it can also overlap with
8651 other cases. To make sure it does not, we put it in a
8652 double linked list here. We sort that with a merge sort
8653 later on to detect any overlapping cases. */
8657 head
->right
= head
->left
= NULL
;
8662 tail
->right
->left
= tail
;
8669 /* It there was a failure in the previous case label, give up
8670 for this case label list. Continue with the next block. */
8674 /* See if any case labels that are unreachable have been seen.
8675 If so, we eliminate them. This is a bit of a kludge because
8676 the case lists for a single case statement (label) is a
8677 single forward linked lists. */
8678 if (seen_unreachable
)
8680 /* Advance until the first case in the list is reachable. */
8681 while (body
->ext
.block
.case_list
!= NULL
8682 && body
->ext
.block
.case_list
->unreachable
)
8684 gfc_case
*n
= body
->ext
.block
.case_list
;
8685 body
->ext
.block
.case_list
= body
->ext
.block
.case_list
->next
;
8687 gfc_free_case_list (n
);
8690 /* Strip all other unreachable cases. */
8691 if (body
->ext
.block
.case_list
)
8693 for (cp
= body
->ext
.block
.case_list
; cp
&& cp
->next
; cp
= cp
->next
)
8695 if (cp
->next
->unreachable
)
8697 gfc_case
*n
= cp
->next
;
8698 cp
->next
= cp
->next
->next
;
8700 gfc_free_case_list (n
);
8707 /* See if there were overlapping cases. If the check returns NULL,
8708 there was overlap. In that case we don't do anything. If head
8709 is non-NULL, we prepend the DEFAULT case. The sorted list can
8710 then used during code generation for SELECT CASE constructs with
8711 a case expression of a CHARACTER type. */
8714 head
= check_case_overlap (head
);
8716 /* Prepend the default_case if it is there. */
8717 if (head
!= NULL
&& default_case
)
8719 default_case
->left
= NULL
;
8720 default_case
->right
= head
;
8721 head
->left
= default_case
;
8725 /* Eliminate dead blocks that may be the result if we've seen
8726 unreachable case labels for a block. */
8727 for (body
= code
; body
&& body
->block
; body
= body
->block
)
8729 if (body
->block
->ext
.block
.case_list
== NULL
)
8731 /* Cut the unreachable block from the code chain. */
8732 gfc_code
*c
= body
->block
;
8733 body
->block
= c
->block
;
8735 /* Kill the dead block, but not the blocks below it. */
8737 gfc_free_statements (c
);
8741 /* More than two cases is legal but insane for logical selects.
8742 Issue a warning for it. */
8743 if (warn_surprising
&& type
== BT_LOGICAL
&& ncases
> 2)
8744 gfc_warning (OPT_Wsurprising
,
8745 "Logical SELECT CASE block at %L has more that two cases",
8750 /* Check if a derived type is extensible. */
8753 gfc_type_is_extensible (gfc_symbol
*sym
)
8755 return !(sym
->attr
.is_bind_c
|| sym
->attr
.sequence
8756 || (sym
->attr
.is_class
8757 && sym
->components
->ts
.u
.derived
->attr
.unlimited_polymorphic
));
8762 resolve_types (gfc_namespace
*ns
);
8764 /* Resolve an associate-name: Resolve target and ensure the type-spec is
8765 correct as well as possibly the array-spec. */
8768 resolve_assoc_var (gfc_symbol
* sym
, bool resolve_target
)
8772 gcc_assert (sym
->assoc
);
8773 gcc_assert (sym
->attr
.flavor
== FL_VARIABLE
);
8775 /* If this is for SELECT TYPE, the target may not yet be set. In that
8776 case, return. Resolution will be called later manually again when
8778 target
= sym
->assoc
->target
;
8781 gcc_assert (!sym
->assoc
->dangling
);
8783 if (resolve_target
&& !gfc_resolve_expr (target
))
8786 /* For variable targets, we get some attributes from the target. */
8787 if (target
->expr_type
== EXPR_VARIABLE
)
8791 gcc_assert (target
->symtree
);
8792 tsym
= target
->symtree
->n
.sym
;
8794 sym
->attr
.asynchronous
= tsym
->attr
.asynchronous
;
8795 sym
->attr
.volatile_
= tsym
->attr
.volatile_
;
8797 sym
->attr
.target
= tsym
->attr
.target
8798 || gfc_expr_attr (target
).pointer
;
8799 if (is_subref_array (target
))
8800 sym
->attr
.subref_array_pointer
= 1;
8803 if (target
->expr_type
== EXPR_NULL
)
8805 gfc_error ("Selector at %L cannot be NULL()", &target
->where
);
8808 else if (target
->ts
.type
== BT_UNKNOWN
)
8810 gfc_error ("Selector at %L has no type", &target
->where
);
8814 /* Get type if this was not already set. Note that it can be
8815 some other type than the target in case this is a SELECT TYPE
8816 selector! So we must not update when the type is already there. */
8817 if (sym
->ts
.type
== BT_UNKNOWN
)
8818 sym
->ts
= target
->ts
;
8820 gcc_assert (sym
->ts
.type
!= BT_UNKNOWN
);
8822 /* See if this is a valid association-to-variable. */
8823 sym
->assoc
->variable
= (target
->expr_type
== EXPR_VARIABLE
8824 && !gfc_has_vector_subscript (target
));
8826 /* Finally resolve if this is an array or not. */
8827 if (sym
->attr
.dimension
&& target
->rank
== 0)
8829 /* primary.c makes the assumption that a reference to an associate
8830 name followed by a left parenthesis is an array reference. */
8831 if (sym
->ts
.type
!= BT_CHARACTER
)
8832 gfc_error ("Associate-name %qs at %L is used as array",
8833 sym
->name
, &sym
->declared_at
);
8834 sym
->attr
.dimension
= 0;
8839 /* We cannot deal with class selectors that need temporaries. */
8840 if (target
->ts
.type
== BT_CLASS
8841 && gfc_ref_needs_temporary_p (target
->ref
))
8843 gfc_error ("CLASS selector at %L needs a temporary which is not "
8844 "yet implemented", &target
->where
);
8848 if (target
->ts
.type
== BT_CLASS
)
8849 gfc_fix_class_refs (target
);
8851 if (target
->rank
!= 0 && !sym
->attr
.select_rank_temporary
)
8854 /* The rank may be incorrectly guessed at parsing, therefore make sure
8855 it is corrected now. */
8856 if (sym
->ts
.type
!= BT_CLASS
&& (!sym
->as
|| sym
->assoc
->rankguessed
))
8859 sym
->as
= gfc_get_array_spec ();
8861 as
->rank
= target
->rank
;
8862 as
->type
= AS_DEFERRED
;
8863 as
->corank
= gfc_get_corank (target
);
8864 sym
->attr
.dimension
= 1;
8865 if (as
->corank
!= 0)
8866 sym
->attr
.codimension
= 1;
8868 else if (sym
->ts
.type
== BT_CLASS
&& (!CLASS_DATA (sym
)->as
|| sym
->assoc
->rankguessed
))
8870 if (!CLASS_DATA (sym
)->as
)
8871 CLASS_DATA (sym
)->as
= gfc_get_array_spec ();
8872 as
= CLASS_DATA (sym
)->as
;
8873 as
->rank
= target
->rank
;
8874 as
->type
= AS_DEFERRED
;
8875 as
->corank
= gfc_get_corank (target
);
8876 CLASS_DATA (sym
)->attr
.dimension
= 1;
8877 if (as
->corank
!= 0)
8878 CLASS_DATA (sym
)->attr
.codimension
= 1;
8881 else if (!sym
->attr
.select_rank_temporary
)
8883 /* target's rank is 0, but the type of the sym is still array valued,
8884 which has to be corrected. */
8885 if (sym
->ts
.type
== BT_CLASS
8886 && CLASS_DATA (sym
) && CLASS_DATA (sym
)->as
)
8889 symbol_attribute attr
;
8890 /* The associated variable's type is still the array type
8891 correct this now. */
8892 gfc_typespec
*ts
= &target
->ts
;
8895 for (ref
= target
->ref
; ref
!= NULL
; ref
= ref
->next
)
8900 ts
= &ref
->u
.c
.component
->ts
;
8903 if (ts
->type
== BT_CLASS
)
8904 ts
= &ts
->u
.derived
->components
->ts
;
8910 /* Create a scalar instance of the current class type. Because the
8911 rank of a class array goes into its name, the type has to be
8912 rebuild. The alternative of (re-)setting just the attributes
8913 and as in the current type, destroys the type also in other
8917 sym
->ts
.type
= BT_CLASS
;
8918 attr
= CLASS_DATA (sym
)->attr
;
8920 attr
.associate_var
= 1;
8921 attr
.dimension
= attr
.codimension
= 0;
8922 attr
.class_pointer
= 1;
8923 if (!gfc_build_class_symbol (&sym
->ts
, &attr
, &as
))
8925 /* Make sure the _vptr is set. */
8926 c
= gfc_find_component (sym
->ts
.u
.derived
, "_vptr", true, true, NULL
);
8927 if (c
->ts
.u
.derived
== NULL
)
8928 c
->ts
.u
.derived
= gfc_find_derived_vtab (sym
->ts
.u
.derived
);
8929 CLASS_DATA (sym
)->attr
.pointer
= 1;
8930 CLASS_DATA (sym
)->attr
.class_pointer
= 1;
8931 gfc_set_sym_referenced (sym
->ts
.u
.derived
);
8932 gfc_commit_symbol (sym
->ts
.u
.derived
);
8933 /* _vptr now has the _vtab in it, change it to the _vtype. */
8934 if (c
->ts
.u
.derived
->attr
.vtab
)
8935 c
->ts
.u
.derived
= c
->ts
.u
.derived
->ts
.u
.derived
;
8936 c
->ts
.u
.derived
->ns
->types_resolved
= 0;
8937 resolve_types (c
->ts
.u
.derived
->ns
);
8941 /* Mark this as an associate variable. */
8942 sym
->attr
.associate_var
= 1;
8944 /* Fix up the type-spec for CHARACTER types. */
8945 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.select_type_temporary
)
8948 sym
->ts
.u
.cl
= target
->ts
.u
.cl
;
8950 if (sym
->ts
.deferred
&& target
->expr_type
== EXPR_VARIABLE
8951 && target
->symtree
->n
.sym
->attr
.dummy
8952 && sym
->ts
.u
.cl
== target
->ts
.u
.cl
)
8954 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
8955 sym
->ts
.deferred
= 1;
8958 if (!sym
->ts
.u
.cl
->length
8959 && !sym
->ts
.deferred
8960 && target
->expr_type
== EXPR_CONSTANT
)
8962 sym
->ts
.u
.cl
->length
=
8963 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
8964 target
->value
.character
.length
);
8966 else if ((!sym
->ts
.u
.cl
->length
8967 || sym
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
)
8968 && target
->expr_type
!= EXPR_VARIABLE
)
8970 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
8971 sym
->ts
.deferred
= 1;
8973 /* This is reset in trans-stmt.c after the assignment
8974 of the target expression to the associate name. */
8975 sym
->attr
.allocatable
= 1;
8979 /* If the target is a good class object, so is the associate variable. */
8980 if (sym
->ts
.type
== BT_CLASS
&& gfc_expr_attr (target
).class_ok
)
8981 sym
->attr
.class_ok
= 1;
8985 /* Ensure that SELECT TYPE expressions have the correct rank and a full
8986 array reference, where necessary. The symbols are artificial and so
8987 the dimension attribute and arrayspec can also be set. In addition,
8988 sometimes the expr1 arrives as BT_DERIVED, when the symbol is BT_CLASS.
8989 This is corrected here as well.*/
8992 fixup_array_ref (gfc_expr
**expr1
, gfc_expr
*expr2
,
8993 int rank
, gfc_ref
*ref
)
8995 gfc_ref
*nref
= (*expr1
)->ref
;
8996 gfc_symbol
*sym1
= (*expr1
)->symtree
->n
.sym
;
8997 gfc_symbol
*sym2
= expr2
? expr2
->symtree
->n
.sym
: NULL
;
8998 (*expr1
)->rank
= rank
;
8999 if (sym1
->ts
.type
== BT_CLASS
)
9001 if ((*expr1
)->ts
.type
!= BT_CLASS
)
9002 (*expr1
)->ts
= sym1
->ts
;
9004 CLASS_DATA (sym1
)->attr
.dimension
= 1;
9005 if (CLASS_DATA (sym1
)->as
== NULL
&& sym2
)
9006 CLASS_DATA (sym1
)->as
9007 = gfc_copy_array_spec (CLASS_DATA (sym2
)->as
);
9011 sym1
->attr
.dimension
= 1;
9012 if (sym1
->as
== NULL
&& sym2
)
9013 sym1
->as
= gfc_copy_array_spec (sym2
->as
);
9016 for (; nref
; nref
= nref
->next
)
9017 if (nref
->next
== NULL
)
9020 if (ref
&& nref
&& nref
->type
!= REF_ARRAY
)
9021 nref
->next
= gfc_copy_ref (ref
);
9022 else if (ref
&& !nref
)
9023 (*expr1
)->ref
= gfc_copy_ref (ref
);
9028 build_loc_call (gfc_expr
*sym_expr
)
9031 loc_call
= gfc_get_expr ();
9032 loc_call
->expr_type
= EXPR_FUNCTION
;
9033 gfc_get_sym_tree ("_loc", gfc_current_ns
, &loc_call
->symtree
, false);
9034 loc_call
->symtree
->n
.sym
->attr
.flavor
= FL_PROCEDURE
;
9035 loc_call
->symtree
->n
.sym
->attr
.intrinsic
= 1;
9036 loc_call
->symtree
->n
.sym
->result
= loc_call
->symtree
->n
.sym
;
9037 gfc_commit_symbol (loc_call
->symtree
->n
.sym
);
9038 loc_call
->ts
.type
= BT_INTEGER
;
9039 loc_call
->ts
.kind
= gfc_index_integer_kind
;
9040 loc_call
->value
.function
.isym
= gfc_intrinsic_function_by_id (GFC_ISYM_LOC
);
9041 loc_call
->value
.function
.actual
= gfc_get_actual_arglist ();
9042 loc_call
->value
.function
.actual
->expr
= sym_expr
;
9043 loc_call
->where
= sym_expr
->where
;
9047 /* Resolve a SELECT TYPE statement. */
9050 resolve_select_type (gfc_code
*code
, gfc_namespace
*old_ns
)
9052 gfc_symbol
*selector_type
;
9053 gfc_code
*body
, *new_st
, *if_st
, *tail
;
9054 gfc_code
*class_is
= NULL
, *default_case
= NULL
;
9057 char name
[GFC_MAX_SYMBOL_LEN
];
9061 gfc_ref
* ref
= NULL
;
9062 gfc_expr
*selector_expr
= NULL
;
9064 ns
= code
->ext
.block
.ns
;
9067 /* Check for F03:C813. */
9068 if (code
->expr1
->ts
.type
!= BT_CLASS
9069 && !(code
->expr2
&& code
->expr2
->ts
.type
== BT_CLASS
))
9071 gfc_error ("Selector shall be polymorphic in SELECT TYPE statement "
9072 "at %L", &code
->loc
);
9076 if (!code
->expr1
->symtree
->n
.sym
->attr
.class_ok
)
9081 gfc_ref
*ref2
= NULL
;
9082 for (ref
= code
->expr2
->ref
; ref
!= NULL
; ref
= ref
->next
)
9083 if (ref
->type
== REF_COMPONENT
9084 && ref
->u
.c
.component
->ts
.type
== BT_CLASS
)
9089 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
9090 code
->expr1
->symtree
->n
.sym
->ts
= ref2
->u
.c
.component
->ts
;
9091 selector_type
= CLASS_DATA (ref2
->u
.c
.component
)->ts
.u
.derived
;
9095 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
9096 code
->expr1
->symtree
->n
.sym
->ts
= code
->expr2
->ts
;
9097 selector_type
= CLASS_DATA (code
->expr2
)->ts
.u
.derived
;
9100 if (code
->expr2
->rank
&& CLASS_DATA (code
->expr1
)->as
)
9101 CLASS_DATA (code
->expr1
)->as
->rank
= code
->expr2
->rank
;
9103 /* F2008: C803 The selector expression must not be coindexed. */
9104 if (gfc_is_coindexed (code
->expr2
))
9106 gfc_error ("Selector at %L must not be coindexed",
9107 &code
->expr2
->where
);
9114 selector_type
= CLASS_DATA (code
->expr1
)->ts
.u
.derived
;
9116 if (gfc_is_coindexed (code
->expr1
))
9118 gfc_error ("Selector at %L must not be coindexed",
9119 &code
->expr1
->where
);
9124 /* Loop over TYPE IS / CLASS IS cases. */
9125 for (body
= code
->block
; body
; body
= body
->block
)
9127 c
= body
->ext
.block
.case_list
;
9131 /* Check for repeated cases. */
9132 for (tail
= code
->block
; tail
; tail
= tail
->block
)
9134 gfc_case
*d
= tail
->ext
.block
.case_list
;
9138 if (c
->ts
.type
== d
->ts
.type
9139 && ((c
->ts
.type
== BT_DERIVED
9140 && c
->ts
.u
.derived
&& d
->ts
.u
.derived
9141 && !strcmp (c
->ts
.u
.derived
->name
,
9142 d
->ts
.u
.derived
->name
))
9143 || c
->ts
.type
== BT_UNKNOWN
9144 || (!(c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9145 && c
->ts
.kind
== d
->ts
.kind
)))
9147 gfc_error ("TYPE IS at %L overlaps with TYPE IS at %L",
9148 &c
->where
, &d
->where
);
9154 /* Check F03:C815. */
9155 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9156 && !selector_type
->attr
.unlimited_polymorphic
9157 && !gfc_type_is_extensible (c
->ts
.u
.derived
))
9159 gfc_error ("Derived type %qs at %L must be extensible",
9160 c
->ts
.u
.derived
->name
, &c
->where
);
9165 /* Check F03:C816. */
9166 if (c
->ts
.type
!= BT_UNKNOWN
&& !selector_type
->attr
.unlimited_polymorphic
9167 && ((c
->ts
.type
!= BT_DERIVED
&& c
->ts
.type
!= BT_CLASS
)
9168 || !gfc_type_is_extension_of (selector_type
, c
->ts
.u
.derived
)))
9170 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9171 gfc_error ("Derived type %qs at %L must be an extension of %qs",
9172 c
->ts
.u
.derived
->name
, &c
->where
, selector_type
->name
);
9174 gfc_error ("Unexpected intrinsic type %qs at %L",
9175 gfc_basic_typename (c
->ts
.type
), &c
->where
);
9180 /* Check F03:C814. */
9181 if (c
->ts
.type
== BT_CHARACTER
9182 && (c
->ts
.u
.cl
->length
!= NULL
|| c
->ts
.deferred
))
9184 gfc_error ("The type-spec at %L shall specify that each length "
9185 "type parameter is assumed", &c
->where
);
9190 /* Intercept the DEFAULT case. */
9191 if (c
->ts
.type
== BT_UNKNOWN
)
9193 /* Check F03:C818. */
9196 gfc_error ("The DEFAULT CASE at %L cannot be followed "
9197 "by a second DEFAULT CASE at %L",
9198 &default_case
->ext
.block
.case_list
->where
, &c
->where
);
9203 default_case
= body
;
9210 /* Transform SELECT TYPE statement to BLOCK and associate selector to
9211 target if present. If there are any EXIT statements referring to the
9212 SELECT TYPE construct, this is no problem because the gfc_code
9213 reference stays the same and EXIT is equally possible from the BLOCK
9214 it is changed to. */
9215 code
->op
= EXEC_BLOCK
;
9218 gfc_association_list
* assoc
;
9220 assoc
= gfc_get_association_list ();
9221 assoc
->st
= code
->expr1
->symtree
;
9222 assoc
->target
= gfc_copy_expr (code
->expr2
);
9223 assoc
->target
->where
= code
->expr2
->where
;
9224 /* assoc->variable will be set by resolve_assoc_var. */
9226 code
->ext
.block
.assoc
= assoc
;
9227 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
9229 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
9232 code
->ext
.block
.assoc
= NULL
;
9234 /* Ensure that the selector rank and arrayspec are available to
9235 correct expressions in which they might be missing. */
9236 if (code
->expr2
&& code
->expr2
->rank
)
9238 rank
= code
->expr2
->rank
;
9239 for (ref
= code
->expr2
->ref
; ref
; ref
= ref
->next
)
9240 if (ref
->next
== NULL
)
9242 if (ref
&& ref
->type
== REF_ARRAY
)
9243 ref
= gfc_copy_ref (ref
);
9245 /* Fixup expr1 if necessary. */
9247 fixup_array_ref (&code
->expr1
, code
->expr2
, rank
, ref
);
9249 else if (code
->expr1
->rank
)
9251 rank
= code
->expr1
->rank
;
9252 for (ref
= code
->expr1
->ref
; ref
; ref
= ref
->next
)
9253 if (ref
->next
== NULL
)
9255 if (ref
&& ref
->type
== REF_ARRAY
)
9256 ref
= gfc_copy_ref (ref
);
9259 /* Add EXEC_SELECT to switch on type. */
9260 new_st
= gfc_get_code (code
->op
);
9261 new_st
->expr1
= code
->expr1
;
9262 new_st
->expr2
= code
->expr2
;
9263 new_st
->block
= code
->block
;
9264 code
->expr1
= code
->expr2
= NULL
;
9269 ns
->code
->next
= new_st
;
9271 code
->op
= EXEC_SELECT_TYPE
;
9273 /* Use the intrinsic LOC function to generate an integer expression
9274 for the vtable of the selector. Note that the rank of the selector
9275 expression has to be set to zero. */
9276 gfc_add_vptr_component (code
->expr1
);
9277 code
->expr1
->rank
= 0;
9278 code
->expr1
= build_loc_call (code
->expr1
);
9279 selector_expr
= code
->expr1
->value
.function
.actual
->expr
;
9281 /* Loop over TYPE IS / CLASS IS cases. */
9282 for (body
= code
->block
; body
; body
= body
->block
)
9286 c
= body
->ext
.block
.case_list
;
9288 /* Generate an index integer expression for address of the
9289 TYPE/CLASS vtable and store it in c->low. The hash expression
9290 is stored in c->high and is used to resolve intrinsic cases. */
9291 if (c
->ts
.type
!= BT_UNKNOWN
)
9293 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9295 vtab
= gfc_find_derived_vtab (c
->ts
.u
.derived
);
9297 c
->high
= gfc_get_int_expr (gfc_integer_4_kind
, NULL
,
9298 c
->ts
.u
.derived
->hash_value
);
9302 vtab
= gfc_find_vtab (&c
->ts
);
9303 gcc_assert (vtab
&& CLASS_DATA (vtab
)->initializer
);
9304 e
= CLASS_DATA (vtab
)->initializer
;
9305 c
->high
= gfc_copy_expr (e
);
9306 if (c
->high
->ts
.kind
!= gfc_integer_4_kind
)
9309 ts
.kind
= gfc_integer_4_kind
;
9310 ts
.type
= BT_INTEGER
;
9311 gfc_convert_type_warn (c
->high
, &ts
, 2, 0);
9315 e
= gfc_lval_expr_from_sym (vtab
);
9316 c
->low
= build_loc_call (e
);
9321 /* Associate temporary to selector. This should only be done
9322 when this case is actually true, so build a new ASSOCIATE
9323 that does precisely this here (instead of using the
9326 if (c
->ts
.type
== BT_CLASS
)
9327 sprintf (name
, "__tmp_class_%s", c
->ts
.u
.derived
->name
);
9328 else if (c
->ts
.type
== BT_DERIVED
)
9329 sprintf (name
, "__tmp_type_%s", c
->ts
.u
.derived
->name
);
9330 else if (c
->ts
.type
== BT_CHARACTER
)
9332 HOST_WIDE_INT charlen
= 0;
9333 if (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9334 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9335 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9336 snprintf (name
, sizeof (name
),
9337 "__tmp_%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9338 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9341 sprintf (name
, "__tmp_%s_%d", gfc_basic_typename (c
->ts
.type
),
9344 st
= gfc_find_symtree (ns
->sym_root
, name
);
9345 gcc_assert (st
->n
.sym
->assoc
);
9346 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9347 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9348 if (c
->ts
.type
!= BT_CLASS
&& c
->ts
.type
!= BT_UNKNOWN
)
9350 gfc_add_data_component (st
->n
.sym
->assoc
->target
);
9351 /* Fixup the target expression if necessary. */
9353 fixup_array_ref (&st
->n
.sym
->assoc
->target
, NULL
, rank
, ref
);
9356 new_st
= gfc_get_code (EXEC_BLOCK
);
9357 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9358 new_st
->ext
.block
.ns
->code
= body
->next
;
9359 body
->next
= new_st
;
9361 /* Chain in the new list only if it is marked as dangling. Otherwise
9362 there is a CASE label overlap and this is already used. Just ignore,
9363 the error is diagnosed elsewhere. */
9364 if (st
->n
.sym
->assoc
->dangling
)
9366 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9367 st
->n
.sym
->assoc
->dangling
= 0;
9370 resolve_assoc_var (st
->n
.sym
, false);
9373 /* Take out CLASS IS cases for separate treatment. */
9375 while (body
&& body
->block
)
9377 if (body
->block
->ext
.block
.case_list
->ts
.type
== BT_CLASS
)
9379 /* Add to class_is list. */
9380 if (class_is
== NULL
)
9382 class_is
= body
->block
;
9387 for (tail
= class_is
; tail
->block
; tail
= tail
->block
) ;
9388 tail
->block
= body
->block
;
9391 /* Remove from EXEC_SELECT list. */
9392 body
->block
= body
->block
->block
;
9405 /* Add a default case to hold the CLASS IS cases. */
9406 for (tail
= code
; tail
->block
; tail
= tail
->block
) ;
9407 tail
->block
= gfc_get_code (EXEC_SELECT_TYPE
);
9409 tail
->ext
.block
.case_list
= gfc_get_case ();
9410 tail
->ext
.block
.case_list
->ts
.type
= BT_UNKNOWN
;
9412 default_case
= tail
;
9415 /* More than one CLASS IS block? */
9416 if (class_is
->block
)
9420 /* Sort CLASS IS blocks by extension level. */
9424 for (c1
= &class_is
; (*c1
) && (*c1
)->block
; c1
= &((*c1
)->block
))
9427 /* F03:C817 (check for doubles). */
9428 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->hash_value
9429 == c2
->ext
.block
.case_list
->ts
.u
.derived
->hash_value
)
9431 gfc_error ("Double CLASS IS block in SELECT TYPE "
9433 &c2
->ext
.block
.case_list
->where
);
9436 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
9437 < c2
->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
)
9440 (*c1
)->block
= c2
->block
;
9450 /* Generate IF chain. */
9451 if_st
= gfc_get_code (EXEC_IF
);
9453 for (body
= class_is
; body
; body
= body
->block
)
9455 new_st
->block
= gfc_get_code (EXEC_IF
);
9456 new_st
= new_st
->block
;
9457 /* Set up IF condition: Call _gfortran_is_extension_of. */
9458 new_st
->expr1
= gfc_get_expr ();
9459 new_st
->expr1
->expr_type
= EXPR_FUNCTION
;
9460 new_st
->expr1
->ts
.type
= BT_LOGICAL
;
9461 new_st
->expr1
->ts
.kind
= 4;
9462 new_st
->expr1
->value
.function
.name
= gfc_get_string (PREFIX ("is_extension_of"));
9463 new_st
->expr1
->value
.function
.isym
= XCNEW (gfc_intrinsic_sym
);
9464 new_st
->expr1
->value
.function
.isym
->id
= GFC_ISYM_EXTENDS_TYPE_OF
;
9465 /* Set up arguments. */
9466 new_st
->expr1
->value
.function
.actual
= gfc_get_actual_arglist ();
9467 new_st
->expr1
->value
.function
.actual
->expr
= gfc_get_variable_expr (selector_expr
->symtree
);
9468 new_st
->expr1
->value
.function
.actual
->expr
->where
= code
->loc
;
9469 new_st
->expr1
->where
= code
->loc
;
9470 gfc_add_vptr_component (new_st
->expr1
->value
.function
.actual
->expr
);
9471 vtab
= gfc_find_derived_vtab (body
->ext
.block
.case_list
->ts
.u
.derived
);
9472 st
= gfc_find_symtree (vtab
->ns
->sym_root
, vtab
->name
);
9473 new_st
->expr1
->value
.function
.actual
->next
= gfc_get_actual_arglist ();
9474 new_st
->expr1
->value
.function
.actual
->next
->expr
= gfc_get_variable_expr (st
);
9475 new_st
->expr1
->value
.function
.actual
->next
->expr
->where
= code
->loc
;
9476 new_st
->next
= body
->next
;
9478 if (default_case
->next
)
9480 new_st
->block
= gfc_get_code (EXEC_IF
);
9481 new_st
= new_st
->block
;
9482 new_st
->next
= default_case
->next
;
9485 /* Replace CLASS DEFAULT code by the IF chain. */
9486 default_case
->next
= if_st
;
9489 /* Resolve the internal code. This cannot be done earlier because
9490 it requires that the sym->assoc of selectors is set already. */
9491 gfc_current_ns
= ns
;
9492 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9493 gfc_current_ns
= old_ns
;
9500 /* Resolve a SELECT RANK statement. */
9503 resolve_select_rank (gfc_code
*code
, gfc_namespace
*old_ns
)
9506 gfc_code
*body
, *new_st
, *tail
;
9508 char tname
[GFC_MAX_SYMBOL_LEN
];
9509 char name
[2 * GFC_MAX_SYMBOL_LEN
];
9511 gfc_expr
*selector_expr
= NULL
;
9513 HOST_WIDE_INT charlen
= 0;
9515 ns
= code
->ext
.block
.ns
;
9518 code
->op
= EXEC_BLOCK
;
9521 gfc_association_list
* assoc
;
9523 assoc
= gfc_get_association_list ();
9524 assoc
->st
= code
->expr1
->symtree
;
9525 assoc
->target
= gfc_copy_expr (code
->expr2
);
9526 assoc
->target
->where
= code
->expr2
->where
;
9527 /* assoc->variable will be set by resolve_assoc_var. */
9529 code
->ext
.block
.assoc
= assoc
;
9530 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
9532 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
9535 code
->ext
.block
.assoc
= NULL
;
9537 /* Loop over RANK cases. Note that returning on the errors causes a
9538 cascade of further errors because the case blocks do not compile
9540 for (body
= code
->block
; body
; body
= body
->block
)
9542 c
= body
->ext
.block
.case_list
;
9544 case_value
= (int) mpz_get_si (c
->low
->value
.integer
);
9548 /* Check for repeated cases. */
9549 for (tail
= code
->block
; tail
; tail
= tail
->block
)
9551 gfc_case
*d
= tail
->ext
.block
.case_list
;
9557 /* Check F2018: C1153. */
9558 if (!c
->low
&& !d
->low
)
9559 gfc_error ("RANK DEFAULT at %L is repeated at %L",
9560 &c
->where
, &d
->where
);
9562 if (!c
->low
|| !d
->low
)
9565 /* Check F2018: C1153. */
9566 case_value2
= (int) mpz_get_si (d
->low
->value
.integer
);
9567 if ((case_value
== case_value2
) && case_value
== -1)
9568 gfc_error ("RANK (*) at %L is repeated at %L",
9569 &c
->where
, &d
->where
);
9570 else if (case_value
== case_value2
)
9571 gfc_error ("RANK (%i) at %L is repeated at %L",
9572 case_value
, &c
->where
, &d
->where
);
9578 /* Check F2018: C1155. */
9579 if (case_value
== -1 && (gfc_expr_attr (code
->expr1
).allocatable
9580 || gfc_expr_attr (code
->expr1
).pointer
))
9581 gfc_error ("RANK (*) at %L cannot be used with the pointer or "
9582 "allocatable selector at %L", &c
->where
, &code
->expr1
->where
);
9584 if (case_value
== -1 && (gfc_expr_attr (code
->expr1
).allocatable
9585 || gfc_expr_attr (code
->expr1
).pointer
))
9586 gfc_error ("RANK (*) at %L cannot be used with the pointer or "
9587 "allocatable selector at %L", &c
->where
, &code
->expr1
->where
);
9590 /* Add EXEC_SELECT to switch on rank. */
9591 new_st
= gfc_get_code (code
->op
);
9592 new_st
->expr1
= code
->expr1
;
9593 new_st
->expr2
= code
->expr2
;
9594 new_st
->block
= code
->block
;
9595 code
->expr1
= code
->expr2
= NULL
;
9600 ns
->code
->next
= new_st
;
9602 code
->op
= EXEC_SELECT_RANK
;
9604 selector_expr
= code
->expr1
;
9606 /* Loop over SELECT RANK cases. */
9607 for (body
= code
->block
; body
; body
= body
->block
)
9609 c
= body
->ext
.block
.case_list
;
9612 /* Pass on the default case. */
9616 /* Associate temporary to selector. This should only be done
9617 when this case is actually true, so build a new ASSOCIATE
9618 that does precisely this here (instead of using the
9620 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9621 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9622 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9624 if (c
->ts
.type
== BT_CLASS
)
9625 sprintf (tname
, "class_%s", c
->ts
.u
.derived
->name
);
9626 else if (c
->ts
.type
== BT_DERIVED
)
9627 sprintf (tname
, "type_%s", c
->ts
.u
.derived
->name
);
9628 else if (c
->ts
.type
!= BT_CHARACTER
)
9629 sprintf (tname
, "%s_%d", gfc_basic_typename (c
->ts
.type
), c
->ts
.kind
);
9631 sprintf (tname
, "%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9632 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9634 case_value
= (int) mpz_get_si (c
->low
->value
.integer
);
9635 if (case_value
>= 0)
9636 sprintf (name
, "__tmp_%s_rank_%d", tname
, case_value
);
9638 sprintf (name
, "__tmp_%s_rank_m%d", tname
, -case_value
);
9640 st
= gfc_find_symtree (ns
->sym_root
, name
);
9641 gcc_assert (st
->n
.sym
->assoc
);
9643 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9644 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9646 new_st
= gfc_get_code (EXEC_BLOCK
);
9647 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9648 new_st
->ext
.block
.ns
->code
= body
->next
;
9649 body
->next
= new_st
;
9651 /* Chain in the new list only if it is marked as dangling. Otherwise
9652 there is a CASE label overlap and this is already used. Just ignore,
9653 the error is diagnosed elsewhere. */
9654 if (st
->n
.sym
->assoc
->dangling
)
9656 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9657 st
->n
.sym
->assoc
->dangling
= 0;
9660 resolve_assoc_var (st
->n
.sym
, false);
9663 gfc_current_ns
= ns
;
9664 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9665 gfc_current_ns
= old_ns
;
9669 /* Resolve a transfer statement. This is making sure that:
9670 -- a derived type being transferred has only non-pointer components
9671 -- a derived type being transferred doesn't have private components, unless
9672 it's being transferred from the module where the type was defined
9673 -- we're not trying to transfer a whole assumed size array. */
9676 resolve_transfer (gfc_code
*code
)
9678 gfc_symbol
*sym
, *derived
;
9682 bool formatted
= false;
9683 gfc_dt
*dt
= code
->ext
.dt
;
9684 gfc_symbol
*dtio_sub
= NULL
;
9688 while (exp
!= NULL
&& exp
->expr_type
== EXPR_OP
9689 && exp
->value
.op
.op
== INTRINSIC_PARENTHESES
)
9690 exp
= exp
->value
.op
.op1
;
9692 if (exp
&& exp
->expr_type
== EXPR_NULL
9695 gfc_error ("Invalid context for NULL () intrinsic at %L",
9700 if (exp
== NULL
|| (exp
->expr_type
!= EXPR_VARIABLE
9701 && exp
->expr_type
!= EXPR_FUNCTION
9702 && exp
->expr_type
!= EXPR_STRUCTURE
))
9705 /* If we are reading, the variable will be changed. Note that
9706 code->ext.dt may be NULL if the TRANSFER is related to
9707 an INQUIRE statement -- but in this case, we are not reading, either. */
9708 if (dt
&& dt
->dt_io_kind
->value
.iokind
== M_READ
9709 && !gfc_check_vardef_context (exp
, false, false, false,
9713 const gfc_typespec
*ts
= exp
->expr_type
== EXPR_STRUCTURE
9714 || exp
->expr_type
== EXPR_FUNCTION
9715 ? &exp
->ts
: &exp
->symtree
->n
.sym
->ts
;
9717 /* Go to actual component transferred. */
9718 for (ref
= exp
->ref
; ref
; ref
= ref
->next
)
9719 if (ref
->type
== REF_COMPONENT
)
9720 ts
= &ref
->u
.c
.component
->ts
;
9722 if (dt
&& dt
->dt_io_kind
->value
.iokind
!= M_INQUIRE
9723 && (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
))
9725 derived
= ts
->u
.derived
;
9727 /* Determine when to use the formatted DTIO procedure. */
9728 if (dt
&& (dt
->format_expr
|| dt
->format_label
))
9731 write
= dt
->dt_io_kind
->value
.iokind
== M_WRITE
9732 || dt
->dt_io_kind
->value
.iokind
== M_PRINT
;
9733 dtio_sub
= gfc_find_specific_dtio_proc (derived
, write
, formatted
);
9735 if (dtio_sub
!= NULL
&& exp
->expr_type
== EXPR_VARIABLE
)
9738 sym
= exp
->symtree
->n
.sym
->ns
->proc_name
;
9739 /* Check to see if this is a nested DTIO call, with the
9740 dummy as the io-list object. */
9741 if (sym
&& sym
== dtio_sub
&& sym
->formal
9742 && sym
->formal
->sym
== exp
->symtree
->n
.sym
9743 && exp
->ref
== NULL
)
9745 if (!sym
->attr
.recursive
)
9747 gfc_error ("DTIO %s procedure at %L must be recursive",
9748 sym
->name
, &sym
->declared_at
);
9755 if (ts
->type
== BT_CLASS
&& dtio_sub
== NULL
)
9757 gfc_error ("Data transfer element at %L cannot be polymorphic unless "
9758 "it is processed by a defined input/output procedure",
9763 if (ts
->type
== BT_DERIVED
)
9765 /* Check that transferred derived type doesn't contain POINTER
9766 components unless it is processed by a defined input/output
9768 if (ts
->u
.derived
->attr
.pointer_comp
&& dtio_sub
== NULL
)
9770 gfc_error ("Data transfer element at %L cannot have POINTER "
9771 "components unless it is processed by a defined "
9772 "input/output procedure", &code
->loc
);
9777 if (ts
->u
.derived
->attr
.proc_pointer_comp
)
9779 gfc_error ("Data transfer element at %L cannot have "
9780 "procedure pointer components", &code
->loc
);
9784 if (ts
->u
.derived
->attr
.alloc_comp
&& dtio_sub
== NULL
)
9786 gfc_error ("Data transfer element at %L cannot have ALLOCATABLE "
9787 "components unless it is processed by a defined "
9788 "input/output procedure", &code
->loc
);
9792 /* C_PTR and C_FUNPTR have private components which means they cannot
9793 be printed. However, if -std=gnu and not -pedantic, allow
9794 the component to be printed to help debugging. */
9795 if (ts
->u
.derived
->ts
.f90_type
== BT_VOID
)
9797 if (!gfc_notify_std (GFC_STD_GNU
, "Data transfer element at %L "
9798 "cannot have PRIVATE components", &code
->loc
))
9801 else if (derived_inaccessible (ts
->u
.derived
) && dtio_sub
== NULL
)
9803 gfc_error ("Data transfer element at %L cannot have "
9804 "PRIVATE components unless it is processed by "
9805 "a defined input/output procedure", &code
->loc
);
9810 if (exp
->expr_type
== EXPR_STRUCTURE
)
9813 sym
= exp
->symtree
->n
.sym
;
9815 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SIZE
&& exp
->ref
9816 && exp
->ref
->type
== REF_ARRAY
&& exp
->ref
->u
.ar
.type
== AR_FULL
)
9818 gfc_error ("Data transfer element at %L cannot be a full reference to "
9819 "an assumed-size array", &code
->loc
);
9823 if (async_io_dt
&& exp
->expr_type
== EXPR_VARIABLE
)
9824 exp
->symtree
->n
.sym
->attr
.asynchronous
= 1;
9828 /*********** Toplevel code resolution subroutines ***********/
9830 /* Find the set of labels that are reachable from this block. We also
9831 record the last statement in each block. */
9834 find_reachable_labels (gfc_code
*block
)
9841 cs_base
->reachable_labels
= bitmap_alloc (&labels_obstack
);
9843 /* Collect labels in this block. We don't keep those corresponding
9844 to END {IF|SELECT}, these are checked in resolve_branch by going
9845 up through the code_stack. */
9846 for (c
= block
; c
; c
= c
->next
)
9848 if (c
->here
&& c
->op
!= EXEC_END_NESTED_BLOCK
)
9849 bitmap_set_bit (cs_base
->reachable_labels
, c
->here
->value
);
9852 /* Merge with labels from parent block. */
9855 gcc_assert (cs_base
->prev
->reachable_labels
);
9856 bitmap_ior_into (cs_base
->reachable_labels
,
9857 cs_base
->prev
->reachable_labels
);
9863 resolve_lock_unlock_event (gfc_code
*code
)
9865 if (code
->expr1
->expr_type
== EXPR_FUNCTION
9866 && code
->expr1
->value
.function
.isym
9867 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
9868 remove_caf_get_intrinsic (code
->expr1
);
9870 if ((code
->op
== EXEC_LOCK
|| code
->op
== EXEC_UNLOCK
)
9871 && (code
->expr1
->ts
.type
!= BT_DERIVED
9872 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9873 || code
->expr1
->ts
.u
.derived
->from_intmod
!= INTMOD_ISO_FORTRAN_ENV
9874 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
!= ISOFORTRAN_LOCK_TYPE
9875 || code
->expr1
->rank
!= 0
9876 || (!gfc_is_coarray (code
->expr1
) &&
9877 !gfc_is_coindexed (code
->expr1
))))
9878 gfc_error ("Lock variable at %L must be a scalar of type LOCK_TYPE",
9879 &code
->expr1
->where
);
9880 else if ((code
->op
== EXEC_EVENT_POST
|| code
->op
== EXEC_EVENT_WAIT
)
9881 && (code
->expr1
->ts
.type
!= BT_DERIVED
9882 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9883 || code
->expr1
->ts
.u
.derived
->from_intmod
9884 != INTMOD_ISO_FORTRAN_ENV
9885 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
9886 != ISOFORTRAN_EVENT_TYPE
9887 || code
->expr1
->rank
!= 0))
9888 gfc_error ("Event variable at %L must be a scalar of type EVENT_TYPE",
9889 &code
->expr1
->where
);
9890 else if (code
->op
== EXEC_EVENT_POST
&& !gfc_is_coarray (code
->expr1
)
9891 && !gfc_is_coindexed (code
->expr1
))
9892 gfc_error ("Event variable argument at %L must be a coarray or coindexed",
9893 &code
->expr1
->where
);
9894 else if (code
->op
== EXEC_EVENT_WAIT
&& !gfc_is_coarray (code
->expr1
))
9895 gfc_error ("Event variable argument at %L must be a coarray but not "
9896 "coindexed", &code
->expr1
->where
);
9900 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9901 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9902 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9903 &code
->expr2
->where
);
9906 && !gfc_check_vardef_context (code
->expr2
, false, false, false,
9907 _("STAT variable")))
9912 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9913 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9914 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9915 &code
->expr3
->where
);
9918 && !gfc_check_vardef_context (code
->expr3
, false, false, false,
9919 _("ERRMSG variable")))
9922 /* Check for LOCK the ACQUIRED_LOCK. */
9923 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9924 && (code
->expr4
->ts
.type
!= BT_LOGICAL
|| code
->expr4
->rank
!= 0
9925 || code
->expr4
->expr_type
!= EXPR_VARIABLE
))
9926 gfc_error ("ACQUIRED_LOCK= argument at %L must be a scalar LOGICAL "
9927 "variable", &code
->expr4
->where
);
9929 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9930 && !gfc_check_vardef_context (code
->expr4
, false, false, false,
9931 _("ACQUIRED_LOCK variable")))
9934 /* Check for EVENT WAIT the UNTIL_COUNT. */
9935 if (code
->op
== EXEC_EVENT_WAIT
&& code
->expr4
)
9937 if (!gfc_resolve_expr (code
->expr4
) || code
->expr4
->ts
.type
!= BT_INTEGER
9938 || code
->expr4
->rank
!= 0)
9939 gfc_error ("UNTIL_COUNT= argument at %L must be a scalar INTEGER "
9940 "expression", &code
->expr4
->where
);
9946 resolve_critical (gfc_code
*code
)
9948 gfc_symtree
*symtree
;
9949 gfc_symbol
*lock_type
;
9950 char name
[GFC_MAX_SYMBOL_LEN
];
9951 static int serial
= 0;
9953 if (flag_coarray
!= GFC_FCOARRAY_LIB
)
9956 symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
9957 GFC_PREFIX ("lock_type"));
9959 lock_type
= symtree
->n
.sym
;
9962 if (gfc_get_sym_tree (GFC_PREFIX ("lock_type"), gfc_current_ns
, &symtree
,
9965 lock_type
= symtree
->n
.sym
;
9966 lock_type
->attr
.flavor
= FL_DERIVED
;
9967 lock_type
->attr
.zero_comp
= 1;
9968 lock_type
->from_intmod
= INTMOD_ISO_FORTRAN_ENV
;
9969 lock_type
->intmod_sym_id
= ISOFORTRAN_LOCK_TYPE
;
9972 sprintf(name
, GFC_PREFIX ("lock_var") "%d",serial
++);
9973 if (gfc_get_sym_tree (name
, gfc_current_ns
, &symtree
, false) != 0)
9976 code
->resolved_sym
= symtree
->n
.sym
;
9977 symtree
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
9978 symtree
->n
.sym
->attr
.referenced
= 1;
9979 symtree
->n
.sym
->attr
.artificial
= 1;
9980 symtree
->n
.sym
->attr
.codimension
= 1;
9981 symtree
->n
.sym
->ts
.type
= BT_DERIVED
;
9982 symtree
->n
.sym
->ts
.u
.derived
= lock_type
;
9983 symtree
->n
.sym
->as
= gfc_get_array_spec ();
9984 symtree
->n
.sym
->as
->corank
= 1;
9985 symtree
->n
.sym
->as
->type
= AS_EXPLICIT
;
9986 symtree
->n
.sym
->as
->cotype
= AS_EXPLICIT
;
9987 symtree
->n
.sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
,
9989 gfc_commit_symbols();
9994 resolve_sync (gfc_code
*code
)
9996 /* Check imageset. The * case matches expr1 == NULL. */
9999 if (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
> 1)
10000 gfc_error ("Imageset argument at %L must be a scalar or rank-1 "
10001 "INTEGER expression", &code
->expr1
->where
);
10002 if (code
->expr1
->expr_type
== EXPR_CONSTANT
&& code
->expr1
->rank
== 0
10003 && mpz_cmp_si (code
->expr1
->value
.integer
, 1) < 0)
10004 gfc_error ("Imageset argument at %L must between 1 and num_images()",
10005 &code
->expr1
->where
);
10006 else if (code
->expr1
->expr_type
== EXPR_ARRAY
10007 && gfc_simplify_expr (code
->expr1
, 0))
10009 gfc_constructor
*cons
;
10010 cons
= gfc_constructor_first (code
->expr1
->value
.constructor
);
10011 for (; cons
; cons
= gfc_constructor_next (cons
))
10012 if (cons
->expr
->expr_type
== EXPR_CONSTANT
10013 && mpz_cmp_si (cons
->expr
->value
.integer
, 1) < 0)
10014 gfc_error ("Imageset argument at %L must between 1 and "
10015 "num_images()", &cons
->expr
->where
);
10020 gfc_resolve_expr (code
->expr2
);
10022 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
10023 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
10024 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
10025 &code
->expr2
->where
);
10027 /* Check ERRMSG. */
10028 gfc_resolve_expr (code
->expr3
);
10030 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
10031 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
10032 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
10033 &code
->expr3
->where
);
10037 /* Given a branch to a label, see if the branch is conforming.
10038 The code node describes where the branch is located. */
10041 resolve_branch (gfc_st_label
*label
, gfc_code
*code
)
10048 /* Step one: is this a valid branching target? */
10050 if (label
->defined
== ST_LABEL_UNKNOWN
)
10052 gfc_error ("Label %d referenced at %L is never defined", label
->value
,
10057 if (label
->defined
!= ST_LABEL_TARGET
&& label
->defined
!= ST_LABEL_DO_TARGET
)
10059 gfc_error ("Statement at %L is not a valid branch target statement "
10060 "for the branch statement at %L", &label
->where
, &code
->loc
);
10064 /* Step two: make sure this branch is not a branch to itself ;-) */
10066 if (code
->here
== label
)
10069 "Branch at %L may result in an infinite loop", &code
->loc
);
10073 /* Step three: See if the label is in the same block as the
10074 branching statement. The hard work has been done by setting up
10075 the bitmap reachable_labels. */
10077 if (bitmap_bit_p (cs_base
->reachable_labels
, label
->value
))
10079 /* Check now whether there is a CRITICAL construct; if so, check
10080 whether the label is still visible outside of the CRITICAL block,
10081 which is invalid. */
10082 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
10084 if (stack
->current
->op
== EXEC_CRITICAL
10085 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
10086 gfc_error ("GOTO statement at %L leaves CRITICAL construct for "
10087 "label at %L", &code
->loc
, &label
->where
);
10088 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
10089 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
10090 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct "
10091 "for label at %L", &code
->loc
, &label
->where
);
10097 /* Step four: If we haven't found the label in the bitmap, it may
10098 still be the label of the END of the enclosing block, in which
10099 case we find it by going up the code_stack. */
10101 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
10103 if (stack
->current
->next
&& stack
->current
->next
->here
== label
)
10105 if (stack
->current
->op
== EXEC_CRITICAL
)
10107 /* Note: A label at END CRITICAL does not leave the CRITICAL
10108 construct as END CRITICAL is still part of it. */
10109 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
10110 " at %L", &code
->loc
, &label
->where
);
10113 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
)
10115 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct for "
10116 "label at %L", &code
->loc
, &label
->where
);
10123 gcc_assert (stack
->current
->next
->op
== EXEC_END_NESTED_BLOCK
);
10127 /* The label is not in an enclosing block, so illegal. This was
10128 allowed in Fortran 66, so we allow it as extension. No
10129 further checks are necessary in this case. */
10130 gfc_notify_std (GFC_STD_LEGACY
, "Label at %L is not in the same block "
10131 "as the GOTO statement at %L", &label
->where
,
10137 /* Check whether EXPR1 has the same shape as EXPR2. */
10140 resolve_where_shape (gfc_expr
*expr1
, gfc_expr
*expr2
)
10142 mpz_t shape
[GFC_MAX_DIMENSIONS
];
10143 mpz_t shape2
[GFC_MAX_DIMENSIONS
];
10144 bool result
= false;
10147 /* Compare the rank. */
10148 if (expr1
->rank
!= expr2
->rank
)
10151 /* Compare the size of each dimension. */
10152 for (i
=0; i
<expr1
->rank
; i
++)
10154 if (!gfc_array_dimen_size (expr1
, i
, &shape
[i
]))
10157 if (!gfc_array_dimen_size (expr2
, i
, &shape2
[i
]))
10160 if (mpz_cmp (shape
[i
], shape2
[i
]))
10164 /* When either of the two expression is an assumed size array, we
10165 ignore the comparison of dimension sizes. */
10170 gfc_clear_shape (shape
, i
);
10171 gfc_clear_shape (shape2
, i
);
10176 /* Check whether a WHERE assignment target or a WHERE mask expression
10177 has the same shape as the outmost WHERE mask expression. */
10180 resolve_where (gfc_code
*code
, gfc_expr
*mask
)
10184 gfc_expr
*e
= NULL
;
10186 cblock
= code
->block
;
10188 /* Store the first WHERE mask-expr of the WHERE statement or construct.
10189 In case of nested WHERE, only the outmost one is stored. */
10190 if (mask
== NULL
) /* outmost WHERE */
10192 else /* inner WHERE */
10199 /* Check if the mask-expr has a consistent shape with the
10200 outmost WHERE mask-expr. */
10201 if (!resolve_where_shape (cblock
->expr1
, e
))
10202 gfc_error ("WHERE mask at %L has inconsistent shape",
10203 &cblock
->expr1
->where
);
10206 /* the assignment statement of a WHERE statement, or the first
10207 statement in where-body-construct of a WHERE construct */
10208 cnext
= cblock
->next
;
10213 /* WHERE assignment statement */
10216 /* Check shape consistent for WHERE assignment target. */
10217 if (e
&& !resolve_where_shape (cnext
->expr1
, e
))
10218 gfc_error ("WHERE assignment target at %L has "
10219 "inconsistent shape", &cnext
->expr1
->where
);
10223 case EXEC_ASSIGN_CALL
:
10224 resolve_call (cnext
);
10225 if (!cnext
->resolved_sym
->attr
.elemental
)
10226 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
10227 &cnext
->ext
.actual
->expr
->where
);
10230 /* WHERE or WHERE construct is part of a where-body-construct */
10232 resolve_where (cnext
, e
);
10236 gfc_error ("Unsupported statement inside WHERE at %L",
10239 /* the next statement within the same where-body-construct */
10240 cnext
= cnext
->next
;
10242 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
10243 cblock
= cblock
->block
;
10248 /* Resolve assignment in FORALL construct.
10249 NVAR is the number of FORALL index variables, and VAR_EXPR records the
10250 FORALL index variables. */
10253 gfc_resolve_assign_in_forall (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
10257 for (n
= 0; n
< nvar
; n
++)
10259 gfc_symbol
*forall_index
;
10261 forall_index
= var_expr
[n
]->symtree
->n
.sym
;
10263 /* Check whether the assignment target is one of the FORALL index
10265 if ((code
->expr1
->expr_type
== EXPR_VARIABLE
)
10266 && (code
->expr1
->symtree
->n
.sym
== forall_index
))
10267 gfc_error ("Assignment to a FORALL index variable at %L",
10268 &code
->expr1
->where
);
10271 /* If one of the FORALL index variables doesn't appear in the
10272 assignment variable, then there could be a many-to-one
10273 assignment. Emit a warning rather than an error because the
10274 mask could be resolving this problem. */
10275 if (!find_forall_index (code
->expr1
, forall_index
, 0))
10276 gfc_warning (0, "The FORALL with index %qs is not used on the "
10277 "left side of the assignment at %L and so might "
10278 "cause multiple assignment to this object",
10279 var_expr
[n
]->symtree
->name
, &code
->expr1
->where
);
10285 /* Resolve WHERE statement in FORALL construct. */
10288 gfc_resolve_where_code_in_forall (gfc_code
*code
, int nvar
,
10289 gfc_expr
**var_expr
)
10294 cblock
= code
->block
;
10297 /* the assignment statement of a WHERE statement, or the first
10298 statement in where-body-construct of a WHERE construct */
10299 cnext
= cblock
->next
;
10304 /* WHERE assignment statement */
10306 gfc_resolve_assign_in_forall (cnext
, nvar
, var_expr
);
10309 /* WHERE operator assignment statement */
10310 case EXEC_ASSIGN_CALL
:
10311 resolve_call (cnext
);
10312 if (!cnext
->resolved_sym
->attr
.elemental
)
10313 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
10314 &cnext
->ext
.actual
->expr
->where
);
10317 /* WHERE or WHERE construct is part of a where-body-construct */
10319 gfc_resolve_where_code_in_forall (cnext
, nvar
, var_expr
);
10323 gfc_error ("Unsupported statement inside WHERE at %L",
10326 /* the next statement within the same where-body-construct */
10327 cnext
= cnext
->next
;
10329 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
10330 cblock
= cblock
->block
;
10335 /* Traverse the FORALL body to check whether the following errors exist:
10336 1. For assignment, check if a many-to-one assignment happens.
10337 2. For WHERE statement, check the WHERE body to see if there is any
10338 many-to-one assignment. */
10341 gfc_resolve_forall_body (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
10345 c
= code
->block
->next
;
10351 case EXEC_POINTER_ASSIGN
:
10352 gfc_resolve_assign_in_forall (c
, nvar
, var_expr
);
10355 case EXEC_ASSIGN_CALL
:
10359 /* Because the gfc_resolve_blocks() will handle the nested FORALL,
10360 there is no need to handle it here. */
10364 gfc_resolve_where_code_in_forall(c
, nvar
, var_expr
);
10369 /* The next statement in the FORALL body. */
10375 /* Counts the number of iterators needed inside a forall construct, including
10376 nested forall constructs. This is used to allocate the needed memory
10377 in gfc_resolve_forall. */
10380 gfc_count_forall_iterators (gfc_code
*code
)
10382 int max_iters
, sub_iters
, current_iters
;
10383 gfc_forall_iterator
*fa
;
10385 gcc_assert(code
->op
== EXEC_FORALL
);
10389 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10392 code
= code
->block
->next
;
10396 if (code
->op
== EXEC_FORALL
)
10398 sub_iters
= gfc_count_forall_iterators (code
);
10399 if (sub_iters
> max_iters
)
10400 max_iters
= sub_iters
;
10405 return current_iters
+ max_iters
;
10409 /* Given a FORALL construct, first resolve the FORALL iterator, then call
10410 gfc_resolve_forall_body to resolve the FORALL body. */
10413 gfc_resolve_forall (gfc_code
*code
, gfc_namespace
*ns
, int forall_save
)
10415 static gfc_expr
**var_expr
;
10416 static int total_var
= 0;
10417 static int nvar
= 0;
10418 int i
, old_nvar
, tmp
;
10419 gfc_forall_iterator
*fa
;
10423 if (!gfc_notify_std (GFC_STD_F2018_OBS
, "FORALL construct at %L", &code
->loc
))
10426 /* Start to resolve a FORALL construct */
10427 if (forall_save
== 0)
10429 /* Count the total number of FORALL indices in the nested FORALL
10430 construct in order to allocate the VAR_EXPR with proper size. */
10431 total_var
= gfc_count_forall_iterators (code
);
10433 /* Allocate VAR_EXPR with NUMBER_OF_FORALL_INDEX elements. */
10434 var_expr
= XCNEWVEC (gfc_expr
*, total_var
);
10437 /* The information about FORALL iterator, including FORALL indices start, end
10438 and stride. An outer FORALL indice cannot appear in start, end or stride. */
10439 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10441 /* Fortran 20008: C738 (R753). */
10442 if (fa
->var
->ref
&& fa
->var
->ref
->type
== REF_ARRAY
)
10444 gfc_error ("FORALL index-name at %L must be a scalar variable "
10445 "of type integer", &fa
->var
->where
);
10449 /* Check if any outer FORALL index name is the same as the current
10451 for (i
= 0; i
< nvar
; i
++)
10453 if (fa
->var
->symtree
->n
.sym
== var_expr
[i
]->symtree
->n
.sym
)
10454 gfc_error ("An outer FORALL construct already has an index "
10455 "with this name %L", &fa
->var
->where
);
10458 /* Record the current FORALL index. */
10459 var_expr
[nvar
] = gfc_copy_expr (fa
->var
);
10463 /* No memory leak. */
10464 gcc_assert (nvar
<= total_var
);
10467 /* Resolve the FORALL body. */
10468 gfc_resolve_forall_body (code
, nvar
, var_expr
);
10470 /* May call gfc_resolve_forall to resolve the inner FORALL loop. */
10471 gfc_resolve_blocks (code
->block
, ns
);
10475 /* Free only the VAR_EXPRs allocated in this frame. */
10476 for (i
= nvar
; i
< tmp
; i
++)
10477 gfc_free_expr (var_expr
[i
]);
10481 /* We are in the outermost FORALL construct. */
10482 gcc_assert (forall_save
== 0);
10484 /* VAR_EXPR is not needed any more. */
10491 /* Resolve a BLOCK construct statement. */
10494 resolve_block_construct (gfc_code
* code
)
10496 /* Resolve the BLOCK's namespace. */
10497 gfc_resolve (code
->ext
.block
.ns
);
10499 /* For an ASSOCIATE block, the associations (and their targets) are already
10500 resolved during resolve_symbol. */
10504 /* Resolve lists of blocks found in IF, SELECT CASE, WHERE, FORALL, GOTO and
10508 gfc_resolve_blocks (gfc_code
*b
, gfc_namespace
*ns
)
10512 for (; b
; b
= b
->block
)
10514 t
= gfc_resolve_expr (b
->expr1
);
10515 if (!gfc_resolve_expr (b
->expr2
))
10521 if (t
&& b
->expr1
!= NULL
10522 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
!= 0))
10523 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
10529 && b
->expr1
!= NULL
10530 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
== 0))
10531 gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
10536 resolve_branch (b
->label1
, b
);
10540 resolve_block_construct (b
);
10544 case EXEC_SELECT_TYPE
:
10545 case EXEC_SELECT_RANK
:
10548 case EXEC_DO_WHILE
:
10549 case EXEC_DO_CONCURRENT
:
10550 case EXEC_CRITICAL
:
10553 case EXEC_IOLENGTH
:
10557 case EXEC_OMP_ATOMIC
:
10558 case EXEC_OACC_ATOMIC
:
10560 gfc_omp_atomic_op aop
10561 = (gfc_omp_atomic_op
) (b
->ext
.omp_atomic
& GFC_OMP_ATOMIC_MASK
);
10563 /* Verify this before calling gfc_resolve_code, which might
10565 gcc_assert (b
->next
&& b
->next
->op
== EXEC_ASSIGN
);
10566 gcc_assert (((aop
!= GFC_OMP_ATOMIC_CAPTURE
)
10567 && b
->next
->next
== NULL
)
10568 || ((aop
== GFC_OMP_ATOMIC_CAPTURE
)
10569 && b
->next
->next
!= NULL
10570 && b
->next
->next
->op
== EXEC_ASSIGN
10571 && b
->next
->next
->next
== NULL
));
10575 case EXEC_OACC_PARALLEL_LOOP
:
10576 case EXEC_OACC_PARALLEL
:
10577 case EXEC_OACC_KERNELS_LOOP
:
10578 case EXEC_OACC_KERNELS
:
10579 case EXEC_OACC_SERIAL_LOOP
:
10580 case EXEC_OACC_SERIAL
:
10581 case EXEC_OACC_DATA
:
10582 case EXEC_OACC_HOST_DATA
:
10583 case EXEC_OACC_LOOP
:
10584 case EXEC_OACC_UPDATE
:
10585 case EXEC_OACC_WAIT
:
10586 case EXEC_OACC_CACHE
:
10587 case EXEC_OACC_ENTER_DATA
:
10588 case EXEC_OACC_EXIT_DATA
:
10589 case EXEC_OACC_ROUTINE
:
10590 case EXEC_OMP_CRITICAL
:
10591 case EXEC_OMP_DISTRIBUTE
:
10592 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
10593 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
10594 case EXEC_OMP_DISTRIBUTE_SIMD
:
10596 case EXEC_OMP_DO_SIMD
:
10597 case EXEC_OMP_MASTER
:
10598 case EXEC_OMP_ORDERED
:
10599 case EXEC_OMP_PARALLEL
:
10600 case EXEC_OMP_PARALLEL_DO
:
10601 case EXEC_OMP_PARALLEL_DO_SIMD
:
10602 case EXEC_OMP_PARALLEL_SECTIONS
:
10603 case EXEC_OMP_PARALLEL_WORKSHARE
:
10604 case EXEC_OMP_SECTIONS
:
10605 case EXEC_OMP_SIMD
:
10606 case EXEC_OMP_SINGLE
:
10607 case EXEC_OMP_TARGET
:
10608 case EXEC_OMP_TARGET_DATA
:
10609 case EXEC_OMP_TARGET_ENTER_DATA
:
10610 case EXEC_OMP_TARGET_EXIT_DATA
:
10611 case EXEC_OMP_TARGET_PARALLEL
:
10612 case EXEC_OMP_TARGET_PARALLEL_DO
:
10613 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
10614 case EXEC_OMP_TARGET_SIMD
:
10615 case EXEC_OMP_TARGET_TEAMS
:
10616 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
10617 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10618 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10619 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
10620 case EXEC_OMP_TARGET_UPDATE
:
10621 case EXEC_OMP_TASK
:
10622 case EXEC_OMP_TASKGROUP
:
10623 case EXEC_OMP_TASKLOOP
:
10624 case EXEC_OMP_TASKLOOP_SIMD
:
10625 case EXEC_OMP_TASKWAIT
:
10626 case EXEC_OMP_TASKYIELD
:
10627 case EXEC_OMP_TEAMS
:
10628 case EXEC_OMP_TEAMS_DISTRIBUTE
:
10629 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10630 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10631 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
10632 case EXEC_OMP_WORKSHARE
:
10636 gfc_internal_error ("gfc_resolve_blocks(): Bad block type");
10639 gfc_resolve_code (b
->next
, ns
);
10644 /* Does everything to resolve an ordinary assignment. Returns true
10645 if this is an interface assignment. */
10647 resolve_ordinary_assign (gfc_code
*code
, gfc_namespace
*ns
)
10654 symbol_attribute attr
;
10656 if (gfc_extend_assign (code
, ns
))
10660 if (code
->op
== EXEC_ASSIGN_CALL
)
10662 lhs
= code
->ext
.actual
->expr
;
10663 rhsptr
= &code
->ext
.actual
->next
->expr
;
10667 gfc_actual_arglist
* args
;
10668 gfc_typebound_proc
* tbp
;
10670 gcc_assert (code
->op
== EXEC_COMPCALL
);
10672 args
= code
->expr1
->value
.compcall
.actual
;
10674 rhsptr
= &args
->next
->expr
;
10676 tbp
= code
->expr1
->value
.compcall
.tbp
;
10677 gcc_assert (!tbp
->is_generic
);
10680 /* Make a temporary rhs when there is a default initializer
10681 and rhs is the same symbol as the lhs. */
10682 if ((*rhsptr
)->expr_type
== EXPR_VARIABLE
10683 && (*rhsptr
)->symtree
->n
.sym
->ts
.type
== BT_DERIVED
10684 && gfc_has_default_initializer ((*rhsptr
)->symtree
->n
.sym
->ts
.u
.derived
)
10685 && (lhs
->symtree
->n
.sym
== (*rhsptr
)->symtree
->n
.sym
))
10686 *rhsptr
= gfc_get_parentheses (*rhsptr
);
10694 if ((gfc_numeric_ts (&lhs
->ts
) || lhs
->ts
.type
== BT_LOGICAL
)
10695 && rhs
->ts
.type
== BT_CHARACTER
10696 && rhs
->expr_type
!= EXPR_CONSTANT
)
10698 /* Use of -fdec-char-conversions allows assignment of character data
10699 to non-character variables. This not permited for nonconstant
10701 gfc_error ("Cannot convert %s to %s at %L", gfc_typename (rhs
),
10702 gfc_typename (lhs
), &rhs
->where
);
10706 /* Handle the case of a BOZ literal on the RHS. */
10707 if (rhs
->ts
.type
== BT_BOZ
)
10709 if (gfc_invalid_boz ("BOZ literal constant at %L is neither a DATA "
10710 "statement value nor an actual argument of "
10711 "INT/REAL/DBLE/CMPLX intrinsic subprogram",
10715 switch (lhs
->ts
.type
)
10718 if (!gfc_boz2int (rhs
, lhs
->ts
.kind
))
10722 if (!gfc_boz2real (rhs
, lhs
->ts
.kind
))
10726 gfc_error ("Invalid use of BOZ literal constant at %L", &rhs
->where
);
10731 if (lhs
->ts
.type
== BT_CHARACTER
&& warn_character_truncation
)
10733 HOST_WIDE_INT llen
= 0, rlen
= 0;
10734 if (lhs
->ts
.u
.cl
!= NULL
10735 && lhs
->ts
.u
.cl
->length
!= NULL
10736 && lhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10737 llen
= gfc_mpz_get_hwi (lhs
->ts
.u
.cl
->length
->value
.integer
);
10739 if (rhs
->expr_type
== EXPR_CONSTANT
)
10740 rlen
= rhs
->value
.character
.length
;
10742 else if (rhs
->ts
.u
.cl
!= NULL
10743 && rhs
->ts
.u
.cl
->length
!= NULL
10744 && rhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10745 rlen
= gfc_mpz_get_hwi (rhs
->ts
.u
.cl
->length
->value
.integer
);
10747 if (rlen
&& llen
&& rlen
> llen
)
10748 gfc_warning_now (OPT_Wcharacter_truncation
,
10749 "CHARACTER expression will be truncated "
10750 "in assignment (%ld/%ld) at %L",
10751 (long) llen
, (long) rlen
, &code
->loc
);
10754 /* Ensure that a vector index expression for the lvalue is evaluated
10755 to a temporary if the lvalue symbol is referenced in it. */
10758 for (ref
= lhs
->ref
; ref
; ref
= ref
->next
)
10759 if (ref
->type
== REF_ARRAY
)
10761 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
10762 if (ref
->u
.ar
.dimen_type
[n
] == DIMEN_VECTOR
10763 && gfc_find_sym_in_expr (lhs
->symtree
->n
.sym
,
10764 ref
->u
.ar
.start
[n
]))
10766 = gfc_get_parentheses (ref
->u
.ar
.start
[n
]);
10770 if (gfc_pure (NULL
))
10772 if (lhs
->ts
.type
== BT_DERIVED
10773 && lhs
->expr_type
== EXPR_VARIABLE
10774 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10775 && rhs
->expr_type
== EXPR_VARIABLE
10776 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10777 || gfc_is_coindexed (rhs
)))
10779 /* F2008, C1283. */
10780 if (gfc_is_coindexed (rhs
))
10781 gfc_error ("Coindexed expression at %L is assigned to "
10782 "a derived type variable with a POINTER "
10783 "component in a PURE procedure",
10786 /* F2008, C1283 (4). */
10787 gfc_error ("In a pure subprogram an INTENT(IN) dummy argument "
10788 "shall not be used as the expr at %L of an intrinsic "
10789 "assignment statement in which the variable is of a "
10790 "derived type if the derived type has a pointer "
10791 "component at any level of component selection.",
10796 /* Fortran 2008, C1283. */
10797 if (gfc_is_coindexed (lhs
))
10799 gfc_error ("Assignment to coindexed variable at %L in a PURE "
10800 "procedure", &rhs
->where
);
10805 if (gfc_implicit_pure (NULL
))
10807 if (lhs
->expr_type
== EXPR_VARIABLE
10808 && lhs
->symtree
->n
.sym
!= gfc_current_ns
->proc_name
10809 && lhs
->symtree
->n
.sym
->ns
!= gfc_current_ns
)
10810 gfc_unset_implicit_pure (NULL
);
10812 if (lhs
->ts
.type
== BT_DERIVED
10813 && lhs
->expr_type
== EXPR_VARIABLE
10814 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10815 && rhs
->expr_type
== EXPR_VARIABLE
10816 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10817 || gfc_is_coindexed (rhs
)))
10818 gfc_unset_implicit_pure (NULL
);
10820 /* Fortran 2008, C1283. */
10821 if (gfc_is_coindexed (lhs
))
10822 gfc_unset_implicit_pure (NULL
);
10825 /* F2008, 7.2.1.2. */
10826 attr
= gfc_expr_attr (lhs
);
10827 if (lhs
->ts
.type
== BT_CLASS
&& attr
.allocatable
)
10829 if (attr
.codimension
)
10831 gfc_error ("Assignment to polymorphic coarray at %L is not "
10832 "permitted", &lhs
->where
);
10835 if (!gfc_notify_std (GFC_STD_F2008
, "Assignment to an allocatable "
10836 "polymorphic variable at %L", &lhs
->where
))
10838 if (!flag_realloc_lhs
)
10840 gfc_error ("Assignment to an allocatable polymorphic variable at %L "
10841 "requires %<-frealloc-lhs%>", &lhs
->where
);
10845 else if (lhs
->ts
.type
== BT_CLASS
)
10847 gfc_error ("Nonallocatable variable must not be polymorphic in intrinsic "
10848 "assignment at %L - check that there is a matching specific "
10849 "subroutine for '=' operator", &lhs
->where
);
10853 bool lhs_coindexed
= gfc_is_coindexed (lhs
);
10855 /* F2008, Section 7.2.1.2. */
10856 if (lhs_coindexed
&& gfc_has_ultimate_allocatable (lhs
))
10858 gfc_error ("Coindexed variable must not have an allocatable ultimate "
10859 "component in assignment at %L", &lhs
->where
);
10863 /* Assign the 'data' of a class object to a derived type. */
10864 if (lhs
->ts
.type
== BT_DERIVED
10865 && rhs
->ts
.type
== BT_CLASS
10866 && rhs
->expr_type
!= EXPR_ARRAY
)
10867 gfc_add_data_component (rhs
);
10869 /* Make sure there is a vtable and, in particular, a _copy for the
10871 if (UNLIMITED_POLY (lhs
) && lhs
->rank
&& rhs
->ts
.type
!= BT_CLASS
)
10872 gfc_find_vtab (&rhs
->ts
);
10874 bool caf_convert_to_send
= flag_coarray
== GFC_FCOARRAY_LIB
10876 || (code
->expr2
->expr_type
== EXPR_FUNCTION
10877 && code
->expr2
->value
.function
.isym
10878 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
10879 && (code
->expr1
->rank
== 0 || code
->expr2
->rank
!= 0)
10880 && !gfc_expr_attr (rhs
).allocatable
10881 && !gfc_has_vector_subscript (rhs
)));
10883 gfc_check_assign (lhs
, rhs
, 1, !caf_convert_to_send
);
10885 /* Insert a GFC_ISYM_CAF_SEND intrinsic, when the LHS is a coindexed variable.
10886 Additionally, insert this code when the RHS is a CAF as we then use the
10887 GFC_ISYM_CAF_SEND intrinsic just to avoid a temporary; but do not do so if
10888 the LHS is (re)allocatable or has a vector subscript. If the LHS is a
10889 noncoindexed array and the RHS is a coindexed scalar, use the normal code
10891 if (caf_convert_to_send
)
10893 if (code
->expr2
->expr_type
== EXPR_FUNCTION
10894 && code
->expr2
->value
.function
.isym
10895 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
10896 remove_caf_get_intrinsic (code
->expr2
);
10897 code
->op
= EXEC_CALL
;
10898 gfc_get_sym_tree (GFC_PREFIX ("caf_send"), ns
, &code
->symtree
, true);
10899 code
->resolved_sym
= code
->symtree
->n
.sym
;
10900 code
->resolved_sym
->attr
.flavor
= FL_PROCEDURE
;
10901 code
->resolved_sym
->attr
.intrinsic
= 1;
10902 code
->resolved_sym
->attr
.subroutine
= 1;
10903 code
->resolved_isym
= gfc_intrinsic_subroutine_by_id (GFC_ISYM_CAF_SEND
);
10904 gfc_commit_symbol (code
->resolved_sym
);
10905 code
->ext
.actual
= gfc_get_actual_arglist ();
10906 code
->ext
.actual
->expr
= lhs
;
10907 code
->ext
.actual
->next
= gfc_get_actual_arglist ();
10908 code
->ext
.actual
->next
->expr
= rhs
;
10909 code
->expr1
= NULL
;
10910 code
->expr2
= NULL
;
10917 /* Add a component reference onto an expression. */
10920 add_comp_ref (gfc_expr
*e
, gfc_component
*c
)
10925 ref
= &((*ref
)->next
);
10926 *ref
= gfc_get_ref ();
10927 (*ref
)->type
= REF_COMPONENT
;
10928 (*ref
)->u
.c
.sym
= e
->ts
.u
.derived
;
10929 (*ref
)->u
.c
.component
= c
;
10932 /* Add a full array ref, as necessary. */
10935 gfc_add_full_array_ref (e
, c
->as
);
10936 e
->rank
= c
->as
->rank
;
10941 /* Build an assignment. Keep the argument 'op' for future use, so that
10942 pointer assignments can be made. */
10945 build_assignment (gfc_exec_op op
, gfc_expr
*expr1
, gfc_expr
*expr2
,
10946 gfc_component
*comp1
, gfc_component
*comp2
, locus loc
)
10948 gfc_code
*this_code
;
10950 this_code
= gfc_get_code (op
);
10951 this_code
->next
= NULL
;
10952 this_code
->expr1
= gfc_copy_expr (expr1
);
10953 this_code
->expr2
= gfc_copy_expr (expr2
);
10954 this_code
->loc
= loc
;
10955 if (comp1
&& comp2
)
10957 add_comp_ref (this_code
->expr1
, comp1
);
10958 add_comp_ref (this_code
->expr2
, comp2
);
10965 /* Makes a temporary variable expression based on the characteristics of
10966 a given variable expression. */
10969 get_temp_from_expr (gfc_expr
*e
, gfc_namespace
*ns
)
10971 static int serial
= 0;
10972 char name
[GFC_MAX_SYMBOL_LEN
];
10974 gfc_array_spec
*as
;
10975 gfc_array_ref
*aref
;
10978 sprintf (name
, GFC_PREFIX("DA%d"), serial
++);
10979 gfc_get_sym_tree (name
, ns
, &tmp
, false);
10980 gfc_add_type (tmp
->n
.sym
, &e
->ts
, NULL
);
10982 if (e
->expr_type
== EXPR_CONSTANT
&& e
->ts
.type
== BT_CHARACTER
)
10983 tmp
->n
.sym
->ts
.u
.cl
->length
= gfc_get_int_expr (gfc_charlen_int_kind
,
10985 e
->value
.character
.length
);
10991 /* Obtain the arrayspec for the temporary. */
10992 if (e
->rank
&& e
->expr_type
!= EXPR_ARRAY
10993 && e
->expr_type
!= EXPR_FUNCTION
10994 && e
->expr_type
!= EXPR_OP
)
10996 aref
= gfc_find_array_ref (e
);
10997 if (e
->expr_type
== EXPR_VARIABLE
10998 && e
->symtree
->n
.sym
->as
== aref
->as
)
11002 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
11003 if (ref
->type
== REF_COMPONENT
11004 && ref
->u
.c
.component
->as
== aref
->as
)
11012 /* Add the attributes and the arrayspec to the temporary. */
11013 tmp
->n
.sym
->attr
= gfc_expr_attr (e
);
11014 tmp
->n
.sym
->attr
.function
= 0;
11015 tmp
->n
.sym
->attr
.result
= 0;
11016 tmp
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
11017 tmp
->n
.sym
->attr
.dummy
= 0;
11018 tmp
->n
.sym
->attr
.intent
= INTENT_UNKNOWN
;
11022 tmp
->n
.sym
->as
= gfc_copy_array_spec (as
);
11025 if (as
->type
== AS_DEFERRED
)
11026 tmp
->n
.sym
->attr
.allocatable
= 1;
11028 else if (e
->rank
&& (e
->expr_type
== EXPR_ARRAY
11029 || e
->expr_type
== EXPR_FUNCTION
11030 || e
->expr_type
== EXPR_OP
))
11032 tmp
->n
.sym
->as
= gfc_get_array_spec ();
11033 tmp
->n
.sym
->as
->type
= AS_DEFERRED
;
11034 tmp
->n
.sym
->as
->rank
= e
->rank
;
11035 tmp
->n
.sym
->attr
.allocatable
= 1;
11036 tmp
->n
.sym
->attr
.dimension
= 1;
11039 tmp
->n
.sym
->attr
.dimension
= 0;
11041 gfc_set_sym_referenced (tmp
->n
.sym
);
11042 gfc_commit_symbol (tmp
->n
.sym
);
11043 e
= gfc_lval_expr_from_sym (tmp
->n
.sym
);
11045 /* Should the lhs be a section, use its array ref for the
11046 temporary expression. */
11047 if (aref
&& aref
->type
!= AR_FULL
)
11049 gfc_free_ref_list (e
->ref
);
11050 e
->ref
= gfc_copy_ref (ref
);
11056 /* Add one line of code to the code chain, making sure that 'head' and
11057 'tail' are appropriately updated. */
11060 add_code_to_chain (gfc_code
**this_code
, gfc_code
**head
, gfc_code
**tail
)
11062 gcc_assert (this_code
);
11064 *head
= *tail
= *this_code
;
11066 *tail
= gfc_append_code (*tail
, *this_code
);
11071 /* Counts the potential number of part array references that would
11072 result from resolution of typebound defined assignments. */
11075 nonscalar_typebound_assign (gfc_symbol
*derived
, int depth
)
11078 int c_depth
= 0, t_depth
;
11080 for (c
= derived
->components
; c
; c
= c
->next
)
11082 if ((!gfc_bt_struct (c
->ts
.type
)
11084 || c
->attr
.allocatable
11085 || c
->attr
.proc_pointer_comp
11086 || c
->attr
.class_pointer
11087 || c
->attr
.proc_pointer
)
11088 && !c
->attr
.defined_assign_comp
)
11091 if (c
->as
&& c_depth
== 0)
11094 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
11095 t_depth
= nonscalar_typebound_assign (c
->ts
.u
.derived
,
11100 c_depth
= t_depth
> c_depth
? t_depth
: c_depth
;
11102 return depth
+ c_depth
;
11106 /* Implement 7.2.1.3 of the F08 standard:
11107 "An intrinsic assignment where the variable is of derived type is
11108 performed as if each component of the variable were assigned from the
11109 corresponding component of expr using pointer assignment (7.2.2) for
11110 each pointer component, defined assignment for each nonpointer
11111 nonallocatable component of a type that has a type-bound defined
11112 assignment consistent with the component, intrinsic assignment for
11113 each other nonpointer nonallocatable component, ..."
11115 The pointer assignments are taken care of by the intrinsic
11116 assignment of the structure itself. This function recursively adds
11117 defined assignments where required. The recursion is accomplished
11118 by calling gfc_resolve_code.
11120 When the lhs in a defined assignment has intent INOUT, we need a
11121 temporary for the lhs. In pseudo-code:
11123 ! Only call function lhs once.
11124 if (lhs is not a constant or an variable)
11127 ! Do the intrinsic assignment
11129 ! Now do the defined assignments
11130 do over components with typebound defined assignment [%cmp]
11131 #if one component's assignment procedure is INOUT
11133 #if expr2 non-variable
11139 t1%cmp {defined=} expr2%cmp
11145 expr1%cmp {defined=} expr2%cmp
11149 /* The temporary assignments have to be put on top of the additional
11150 code to avoid the result being changed by the intrinsic assignment.
11152 static int component_assignment_level
= 0;
11153 static gfc_code
*tmp_head
= NULL
, *tmp_tail
= NULL
;
11156 generate_component_assignments (gfc_code
**code
, gfc_namespace
*ns
)
11158 gfc_component
*comp1
, *comp2
;
11159 gfc_code
*this_code
= NULL
, *head
= NULL
, *tail
= NULL
;
11161 int error_count
, depth
;
11163 gfc_get_errors (NULL
, &error_count
);
11165 /* Filter out continuing processing after an error. */
11167 || (*code
)->expr1
->ts
.type
!= BT_DERIVED
11168 || (*code
)->expr2
->ts
.type
!= BT_DERIVED
)
11171 /* TODO: Handle more than one part array reference in assignments. */
11172 depth
= nonscalar_typebound_assign ((*code
)->expr1
->ts
.u
.derived
,
11173 (*code
)->expr1
->rank
? 1 : 0);
11176 gfc_warning (0, "TODO: type-bound defined assignment(s) at %L not "
11177 "done because multiple part array references would "
11178 "occur in intermediate expressions.", &(*code
)->loc
);
11182 component_assignment_level
++;
11184 /* Create a temporary so that functions get called only once. */
11185 if ((*code
)->expr2
->expr_type
!= EXPR_VARIABLE
11186 && (*code
)->expr2
->expr_type
!= EXPR_CONSTANT
)
11188 gfc_expr
*tmp_expr
;
11190 /* Assign the rhs to the temporary. */
11191 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11192 this_code
= build_assignment (EXEC_ASSIGN
,
11193 tmp_expr
, (*code
)->expr2
,
11194 NULL
, NULL
, (*code
)->loc
);
11195 /* Add the code and substitute the rhs expression. */
11196 add_code_to_chain (&this_code
, &tmp_head
, &tmp_tail
);
11197 gfc_free_expr ((*code
)->expr2
);
11198 (*code
)->expr2
= tmp_expr
;
11201 /* Do the intrinsic assignment. This is not needed if the lhs is one
11202 of the temporaries generated here, since the intrinsic assignment
11203 to the final result already does this. */
11204 if ((*code
)->expr1
->symtree
->n
.sym
->name
[2] != '@')
11206 this_code
= build_assignment (EXEC_ASSIGN
,
11207 (*code
)->expr1
, (*code
)->expr2
,
11208 NULL
, NULL
, (*code
)->loc
);
11209 add_code_to_chain (&this_code
, &head
, &tail
);
11212 comp1
= (*code
)->expr1
->ts
.u
.derived
->components
;
11213 comp2
= (*code
)->expr2
->ts
.u
.derived
->components
;
11216 for (; comp1
; comp1
= comp1
->next
, comp2
= comp2
->next
)
11218 bool inout
= false;
11220 /* The intrinsic assignment does the right thing for pointers
11221 of all kinds and allocatable components. */
11222 if (!gfc_bt_struct (comp1
->ts
.type
)
11223 || comp1
->attr
.pointer
11224 || comp1
->attr
.allocatable
11225 || comp1
->attr
.proc_pointer_comp
11226 || comp1
->attr
.class_pointer
11227 || comp1
->attr
.proc_pointer
)
11230 /* Make an assigment for this component. */
11231 this_code
= build_assignment (EXEC_ASSIGN
,
11232 (*code
)->expr1
, (*code
)->expr2
,
11233 comp1
, comp2
, (*code
)->loc
);
11235 /* Convert the assignment if there is a defined assignment for
11236 this type. Otherwise, using the call from gfc_resolve_code,
11237 recurse into its components. */
11238 gfc_resolve_code (this_code
, ns
);
11240 if (this_code
->op
== EXEC_ASSIGN_CALL
)
11242 gfc_formal_arglist
*dummy_args
;
11244 /* Check that there is a typebound defined assignment. If not,
11245 then this must be a module defined assignment. We cannot
11246 use the defined_assign_comp attribute here because it must
11247 be this derived type that has the defined assignment and not
11249 if (!(comp1
->ts
.u
.derived
->f2k_derived
11250 && comp1
->ts
.u
.derived
->f2k_derived
11251 ->tb_op
[INTRINSIC_ASSIGN
]))
11253 gfc_free_statements (this_code
);
11258 /* If the first argument of the subroutine has intent INOUT
11259 a temporary must be generated and used instead. */
11260 rsym
= this_code
->resolved_sym
;
11261 dummy_args
= gfc_sym_get_dummy_args (rsym
);
11263 && dummy_args
->sym
->attr
.intent
== INTENT_INOUT
)
11265 gfc_code
*temp_code
;
11268 /* Build the temporary required for the assignment and put
11269 it at the head of the generated code. */
11272 t1
= get_temp_from_expr ((*code
)->expr1
, ns
);
11273 temp_code
= build_assignment (EXEC_ASSIGN
,
11274 t1
, (*code
)->expr1
,
11275 NULL
, NULL
, (*code
)->loc
);
11277 /* For allocatable LHS, check whether it is allocated. Note
11278 that allocatable components with defined assignment are
11279 not yet support. See PR 57696. */
11280 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
)
11284 gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11285 block
= gfc_get_code (EXEC_IF
);
11286 block
->block
= gfc_get_code (EXEC_IF
);
11287 block
->block
->expr1
11288 = gfc_build_intrinsic_call (ns
,
11289 GFC_ISYM_ALLOCATED
, "allocated",
11290 (*code
)->loc
, 1, e
);
11291 block
->block
->next
= temp_code
;
11294 add_code_to_chain (&temp_code
, &tmp_head
, &tmp_tail
);
11297 /* Replace the first actual arg with the component of the
11299 gfc_free_expr (this_code
->ext
.actual
->expr
);
11300 this_code
->ext
.actual
->expr
= gfc_copy_expr (t1
);
11301 add_comp_ref (this_code
->ext
.actual
->expr
, comp1
);
11303 /* If the LHS variable is allocatable and wasn't allocated and
11304 the temporary is allocatable, pointer assign the address of
11305 the freshly allocated LHS to the temporary. */
11306 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
11307 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11312 cond
= gfc_get_expr ();
11313 cond
->ts
.type
= BT_LOGICAL
;
11314 cond
->ts
.kind
= gfc_default_logical_kind
;
11315 cond
->expr_type
= EXPR_OP
;
11316 cond
->where
= (*code
)->loc
;
11317 cond
->value
.op
.op
= INTRINSIC_NOT
;
11318 cond
->value
.op
.op1
= gfc_build_intrinsic_call (ns
,
11319 GFC_ISYM_ALLOCATED
, "allocated",
11320 (*code
)->loc
, 1, gfc_copy_expr (t1
));
11321 block
= gfc_get_code (EXEC_IF
);
11322 block
->block
= gfc_get_code (EXEC_IF
);
11323 block
->block
->expr1
= cond
;
11324 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11325 t1
, (*code
)->expr1
,
11326 NULL
, NULL
, (*code
)->loc
);
11327 add_code_to_chain (&block
, &head
, &tail
);
11331 else if (this_code
->op
== EXEC_ASSIGN
&& !this_code
->next
)
11333 /* Don't add intrinsic assignments since they are already
11334 effected by the intrinsic assignment of the structure. */
11335 gfc_free_statements (this_code
);
11340 add_code_to_chain (&this_code
, &head
, &tail
);
11344 /* Transfer the value to the final result. */
11345 this_code
= build_assignment (EXEC_ASSIGN
,
11346 (*code
)->expr1
, t1
,
11347 comp1
, comp2
, (*code
)->loc
);
11348 add_code_to_chain (&this_code
, &head
, &tail
);
11352 /* Put the temporary assignments at the top of the generated code. */
11353 if (tmp_head
&& component_assignment_level
== 1)
11355 gfc_append_code (tmp_head
, head
);
11357 tmp_head
= tmp_tail
= NULL
;
11360 // If we did a pointer assignment - thus, we need to ensure that the LHS is
11361 // not accidentally deallocated. Hence, nullify t1.
11362 if (t1
&& (*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
11363 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11369 e
= gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11370 cond
= gfc_build_intrinsic_call (ns
, GFC_ISYM_ASSOCIATED
, "associated",
11371 (*code
)->loc
, 2, gfc_copy_expr (t1
), e
);
11372 block
= gfc_get_code (EXEC_IF
);
11373 block
->block
= gfc_get_code (EXEC_IF
);
11374 block
->block
->expr1
= cond
;
11375 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11376 t1
, gfc_get_null_expr (&(*code
)->loc
),
11377 NULL
, NULL
, (*code
)->loc
);
11378 gfc_append_code (tail
, block
);
11382 /* Now attach the remaining code chain to the input code. Step on
11383 to the end of the new code since resolution is complete. */
11384 gcc_assert ((*code
)->op
== EXEC_ASSIGN
);
11385 tail
->next
= (*code
)->next
;
11386 /* Overwrite 'code' because this would place the intrinsic assignment
11387 before the temporary for the lhs is created. */
11388 gfc_free_expr ((*code
)->expr1
);
11389 gfc_free_expr ((*code
)->expr2
);
11395 component_assignment_level
--;
11399 /* F2008: Pointer function assignments are of the form:
11400 ptr_fcn (args) = expr
11401 This function breaks these assignments into two statements:
11402 temporary_pointer => ptr_fcn(args)
11403 temporary_pointer = expr */
11406 resolve_ptr_fcn_assign (gfc_code
**code
, gfc_namespace
*ns
)
11408 gfc_expr
*tmp_ptr_expr
;
11409 gfc_code
*this_code
;
11410 gfc_component
*comp
;
11413 if ((*code
)->expr1
->expr_type
!= EXPR_FUNCTION
)
11416 /* Even if standard does not support this feature, continue to build
11417 the two statements to avoid upsetting frontend_passes.c. */
11418 gfc_notify_std (GFC_STD_F2008
, "Pointer procedure assignment at "
11419 "%L", &(*code
)->loc
);
11421 comp
= gfc_get_proc_ptr_comp ((*code
)->expr1
);
11424 s
= comp
->ts
.interface
;
11426 s
= (*code
)->expr1
->symtree
->n
.sym
;
11428 if (s
== NULL
|| !s
->result
->attr
.pointer
)
11430 gfc_error ("The function result on the lhs of the assignment at "
11431 "%L must have the pointer attribute.",
11432 &(*code
)->expr1
->where
);
11433 (*code
)->op
= EXEC_NOP
;
11437 tmp_ptr_expr
= get_temp_from_expr ((*code
)->expr2
, ns
);
11439 /* get_temp_from_expression is set up for ordinary assignments. To that
11440 end, where array bounds are not known, arrays are made allocatable.
11441 Change the temporary to a pointer here. */
11442 tmp_ptr_expr
->symtree
->n
.sym
->attr
.pointer
= 1;
11443 tmp_ptr_expr
->symtree
->n
.sym
->attr
.allocatable
= 0;
11444 tmp_ptr_expr
->where
= (*code
)->loc
;
11446 this_code
= build_assignment (EXEC_ASSIGN
,
11447 tmp_ptr_expr
, (*code
)->expr2
,
11448 NULL
, NULL
, (*code
)->loc
);
11449 this_code
->next
= (*code
)->next
;
11450 (*code
)->next
= this_code
;
11451 (*code
)->op
= EXEC_POINTER_ASSIGN
;
11452 (*code
)->expr2
= (*code
)->expr1
;
11453 (*code
)->expr1
= tmp_ptr_expr
;
11459 /* Deferred character length assignments from an operator expression
11460 require a temporary because the character length of the lhs can
11461 change in the course of the assignment. */
11464 deferred_op_assign (gfc_code
**code
, gfc_namespace
*ns
)
11466 gfc_expr
*tmp_expr
;
11467 gfc_code
*this_code
;
11469 if (!((*code
)->expr1
->ts
.type
== BT_CHARACTER
11470 && (*code
)->expr1
->ts
.deferred
&& (*code
)->expr1
->rank
11471 && (*code
)->expr2
->expr_type
== EXPR_OP
))
11474 if (!gfc_check_dependency ((*code
)->expr1
, (*code
)->expr2
, 1))
11477 if (gfc_expr_attr ((*code
)->expr1
).pointer
)
11480 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11481 tmp_expr
->where
= (*code
)->loc
;
11483 /* A new charlen is required to ensure that the variable string
11484 length is different to that of the original lhs. */
11485 tmp_expr
->ts
.u
.cl
= gfc_get_charlen();
11486 tmp_expr
->symtree
->n
.sym
->ts
.u
.cl
= tmp_expr
->ts
.u
.cl
;
11487 tmp_expr
->ts
.u
.cl
->next
= (*code
)->expr2
->ts
.u
.cl
->next
;
11488 (*code
)->expr2
->ts
.u
.cl
->next
= tmp_expr
->ts
.u
.cl
;
11490 tmp_expr
->symtree
->n
.sym
->ts
.deferred
= 1;
11492 this_code
= build_assignment (EXEC_ASSIGN
,
11494 gfc_copy_expr (tmp_expr
),
11495 NULL
, NULL
, (*code
)->loc
);
11497 (*code
)->expr1
= tmp_expr
;
11499 this_code
->next
= (*code
)->next
;
11500 (*code
)->next
= this_code
;
11506 /* Given a block of code, recursively resolve everything pointed to by this
11510 gfc_resolve_code (gfc_code
*code
, gfc_namespace
*ns
)
11512 int omp_workshare_save
;
11513 int forall_save
, do_concurrent_save
;
11517 frame
.prev
= cs_base
;
11521 find_reachable_labels (code
);
11523 for (; code
; code
= code
->next
)
11525 frame
.current
= code
;
11526 forall_save
= forall_flag
;
11527 do_concurrent_save
= gfc_do_concurrent_flag
;
11529 if (code
->op
== EXEC_FORALL
)
11532 gfc_resolve_forall (code
, ns
, forall_save
);
11535 else if (code
->block
)
11537 omp_workshare_save
= -1;
11540 case EXEC_OACC_PARALLEL_LOOP
:
11541 case EXEC_OACC_PARALLEL
:
11542 case EXEC_OACC_KERNELS_LOOP
:
11543 case EXEC_OACC_KERNELS
:
11544 case EXEC_OACC_SERIAL_LOOP
:
11545 case EXEC_OACC_SERIAL
:
11546 case EXEC_OACC_DATA
:
11547 case EXEC_OACC_HOST_DATA
:
11548 case EXEC_OACC_LOOP
:
11549 gfc_resolve_oacc_blocks (code
, ns
);
11551 case EXEC_OMP_PARALLEL_WORKSHARE
:
11552 omp_workshare_save
= omp_workshare_flag
;
11553 omp_workshare_flag
= 1;
11554 gfc_resolve_omp_parallel_blocks (code
, ns
);
11556 case EXEC_OMP_PARALLEL
:
11557 case EXEC_OMP_PARALLEL_DO
:
11558 case EXEC_OMP_PARALLEL_DO_SIMD
:
11559 case EXEC_OMP_PARALLEL_SECTIONS
:
11560 case EXEC_OMP_TARGET_PARALLEL
:
11561 case EXEC_OMP_TARGET_PARALLEL_DO
:
11562 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11563 case EXEC_OMP_TARGET_TEAMS
:
11564 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11565 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11566 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11567 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11568 case EXEC_OMP_TASK
:
11569 case EXEC_OMP_TASKLOOP
:
11570 case EXEC_OMP_TASKLOOP_SIMD
:
11571 case EXEC_OMP_TEAMS
:
11572 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11573 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11574 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11575 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11576 omp_workshare_save
= omp_workshare_flag
;
11577 omp_workshare_flag
= 0;
11578 gfc_resolve_omp_parallel_blocks (code
, ns
);
11580 case EXEC_OMP_DISTRIBUTE
:
11581 case EXEC_OMP_DISTRIBUTE_SIMD
:
11583 case EXEC_OMP_DO_SIMD
:
11584 case EXEC_OMP_SIMD
:
11585 case EXEC_OMP_TARGET_SIMD
:
11586 gfc_resolve_omp_do_blocks (code
, ns
);
11588 case EXEC_SELECT_TYPE
:
11589 /* Blocks are handled in resolve_select_type because we have
11590 to transform the SELECT TYPE into ASSOCIATE first. */
11592 case EXEC_DO_CONCURRENT
:
11593 gfc_do_concurrent_flag
= 1;
11594 gfc_resolve_blocks (code
->block
, ns
);
11595 gfc_do_concurrent_flag
= 2;
11597 case EXEC_OMP_WORKSHARE
:
11598 omp_workshare_save
= omp_workshare_flag
;
11599 omp_workshare_flag
= 1;
11602 gfc_resolve_blocks (code
->block
, ns
);
11606 if (omp_workshare_save
!= -1)
11607 omp_workshare_flag
= omp_workshare_save
;
11611 if (code
->op
!= EXEC_COMPCALL
&& code
->op
!= EXEC_CALL_PPC
)
11612 t
= gfc_resolve_expr (code
->expr1
);
11613 forall_flag
= forall_save
;
11614 gfc_do_concurrent_flag
= do_concurrent_save
;
11616 if (!gfc_resolve_expr (code
->expr2
))
11619 if (code
->op
== EXEC_ALLOCATE
11620 && !gfc_resolve_expr (code
->expr3
))
11626 case EXEC_END_BLOCK
:
11627 case EXEC_END_NESTED_BLOCK
:
11631 case EXEC_ERROR_STOP
:
11633 case EXEC_CONTINUE
:
11635 case EXEC_ASSIGN_CALL
:
11638 case EXEC_CRITICAL
:
11639 resolve_critical (code
);
11642 case EXEC_SYNC_ALL
:
11643 case EXEC_SYNC_IMAGES
:
11644 case EXEC_SYNC_MEMORY
:
11645 resolve_sync (code
);
11650 case EXEC_EVENT_POST
:
11651 case EXEC_EVENT_WAIT
:
11652 resolve_lock_unlock_event (code
);
11655 case EXEC_FAIL_IMAGE
:
11656 case EXEC_FORM_TEAM
:
11657 case EXEC_CHANGE_TEAM
:
11658 case EXEC_END_TEAM
:
11659 case EXEC_SYNC_TEAM
:
11663 /* Keep track of which entry we are up to. */
11664 current_entry_id
= code
->ext
.entry
->id
;
11668 resolve_where (code
, NULL
);
11672 if (code
->expr1
!= NULL
)
11674 if (code
->expr1
->ts
.type
!= BT_INTEGER
)
11675 gfc_error ("ASSIGNED GOTO statement at %L requires an "
11676 "INTEGER variable", &code
->expr1
->where
);
11677 else if (code
->expr1
->symtree
->n
.sym
->attr
.assign
!= 1)
11678 gfc_error ("Variable %qs has not been assigned a target "
11679 "label at %L", code
->expr1
->symtree
->n
.sym
->name
,
11680 &code
->expr1
->where
);
11683 resolve_branch (code
->label1
, code
);
11687 if (code
->expr1
!= NULL
11688 && (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
))
11689 gfc_error ("Alternate RETURN statement at %L requires a SCALAR-"
11690 "INTEGER return specifier", &code
->expr1
->where
);
11693 case EXEC_INIT_ASSIGN
:
11694 case EXEC_END_PROCEDURE
:
11701 /* Remove a GFC_ISYM_CAF_GET inserted for a coindexed variable on
11703 if (code
->expr1
->expr_type
== EXPR_FUNCTION
11704 && code
->expr1
->value
.function
.isym
11705 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
11706 remove_caf_get_intrinsic (code
->expr1
);
11708 /* If this is a pointer function in an lvalue variable context,
11709 the new code will have to be resolved afresh. This is also the
11710 case with an error, where the code is transformed into NOP to
11711 prevent ICEs downstream. */
11712 if (resolve_ptr_fcn_assign (&code
, ns
)
11713 || code
->op
== EXEC_NOP
)
11716 if (!gfc_check_vardef_context (code
->expr1
, false, false, false,
11720 if (resolve_ordinary_assign (code
, ns
))
11722 if (code
->op
== EXEC_COMPCALL
)
11728 /* Check for dependencies in deferred character length array
11729 assignments and generate a temporary, if necessary. */
11730 if (code
->op
== EXEC_ASSIGN
&& deferred_op_assign (&code
, ns
))
11733 /* F03 7.4.1.3 for non-allocatable, non-pointer components. */
11734 if (code
->op
!= EXEC_CALL
&& code
->expr1
->ts
.type
== BT_DERIVED
11735 && code
->expr1
->ts
.u
.derived
11736 && code
->expr1
->ts
.u
.derived
->attr
.defined_assign_comp
)
11737 generate_component_assignments (&code
, ns
);
11741 case EXEC_LABEL_ASSIGN
:
11742 if (code
->label1
->defined
== ST_LABEL_UNKNOWN
)
11743 gfc_error ("Label %d referenced at %L is never defined",
11744 code
->label1
->value
, &code
->label1
->where
);
11746 && (code
->expr1
->expr_type
!= EXPR_VARIABLE
11747 || code
->expr1
->symtree
->n
.sym
->ts
.type
!= BT_INTEGER
11748 || code
->expr1
->symtree
->n
.sym
->ts
.kind
11749 != gfc_default_integer_kind
11750 || code
->expr1
->symtree
->n
.sym
->as
!= NULL
))
11751 gfc_error ("ASSIGN statement at %L requires a scalar "
11752 "default INTEGER variable", &code
->expr1
->where
);
11755 case EXEC_POINTER_ASSIGN
:
11762 /* This is both a variable definition and pointer assignment
11763 context, so check both of them. For rank remapping, a final
11764 array ref may be present on the LHS and fool gfc_expr_attr
11765 used in gfc_check_vardef_context. Remove it. */
11766 e
= remove_last_array_ref (code
->expr1
);
11767 t
= gfc_check_vardef_context (e
, true, false, false,
11768 _("pointer assignment"));
11770 t
= gfc_check_vardef_context (e
, false, false, false,
11771 _("pointer assignment"));
11774 t
= gfc_check_pointer_assign (code
->expr1
, code
->expr2
, !t
) && t
;
11779 /* Assigning a class object always is a regular assign. */
11780 if (code
->expr2
->ts
.type
== BT_CLASS
11781 && code
->expr1
->ts
.type
== BT_CLASS
11782 && !CLASS_DATA (code
->expr2
)->attr
.dimension
11783 && !(gfc_expr_attr (code
->expr1
).proc_pointer
11784 && code
->expr2
->expr_type
== EXPR_VARIABLE
11785 && code
->expr2
->symtree
->n
.sym
->attr
.flavor
11787 code
->op
= EXEC_ASSIGN
;
11791 case EXEC_ARITHMETIC_IF
:
11793 gfc_expr
*e
= code
->expr1
;
11795 gfc_resolve_expr (e
);
11796 if (e
->expr_type
== EXPR_NULL
)
11797 gfc_error ("Invalid NULL at %L", &e
->where
);
11799 if (t
&& (e
->rank
> 0
11800 || !(e
->ts
.type
== BT_REAL
|| e
->ts
.type
== BT_INTEGER
)))
11801 gfc_error ("Arithmetic IF statement at %L requires a scalar "
11802 "REAL or INTEGER expression", &e
->where
);
11804 resolve_branch (code
->label1
, code
);
11805 resolve_branch (code
->label2
, code
);
11806 resolve_branch (code
->label3
, code
);
11811 if (t
&& code
->expr1
!= NULL
11812 && (code
->expr1
->ts
.type
!= BT_LOGICAL
11813 || code
->expr1
->rank
!= 0))
11814 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
11815 &code
->expr1
->where
);
11820 resolve_call (code
);
11823 case EXEC_COMPCALL
:
11825 resolve_typebound_subroutine (code
);
11828 case EXEC_CALL_PPC
:
11829 resolve_ppc_call (code
);
11833 /* Select is complicated. Also, a SELECT construct could be
11834 a transformed computed GOTO. */
11835 resolve_select (code
, false);
11838 case EXEC_SELECT_TYPE
:
11839 resolve_select_type (code
, ns
);
11842 case EXEC_SELECT_RANK
:
11843 resolve_select_rank (code
, ns
);
11847 resolve_block_construct (code
);
11851 if (code
->ext
.iterator
!= NULL
)
11853 gfc_iterator
*iter
= code
->ext
.iterator
;
11854 if (gfc_resolve_iterator (iter
, true, false))
11855 gfc_resolve_do_iterator (code
, iter
->var
->symtree
->n
.sym
,
11860 case EXEC_DO_WHILE
:
11861 if (code
->expr1
== NULL
)
11862 gfc_internal_error ("gfc_resolve_code(): No expression on "
11865 && (code
->expr1
->rank
!= 0
11866 || code
->expr1
->ts
.type
!= BT_LOGICAL
))
11867 gfc_error ("Exit condition of DO WHILE loop at %L must be "
11868 "a scalar LOGICAL expression", &code
->expr1
->where
);
11871 case EXEC_ALLOCATE
:
11873 resolve_allocate_deallocate (code
, "ALLOCATE");
11877 case EXEC_DEALLOCATE
:
11879 resolve_allocate_deallocate (code
, "DEALLOCATE");
11884 if (!gfc_resolve_open (code
->ext
.open
))
11887 resolve_branch (code
->ext
.open
->err
, code
);
11891 if (!gfc_resolve_close (code
->ext
.close
))
11894 resolve_branch (code
->ext
.close
->err
, code
);
11897 case EXEC_BACKSPACE
:
11901 if (!gfc_resolve_filepos (code
->ext
.filepos
, &code
->loc
))
11904 resolve_branch (code
->ext
.filepos
->err
, code
);
11908 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11911 resolve_branch (code
->ext
.inquire
->err
, code
);
11914 case EXEC_IOLENGTH
:
11915 gcc_assert (code
->ext
.inquire
!= NULL
);
11916 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11919 resolve_branch (code
->ext
.inquire
->err
, code
);
11923 if (!gfc_resolve_wait (code
->ext
.wait
))
11926 resolve_branch (code
->ext
.wait
->err
, code
);
11927 resolve_branch (code
->ext
.wait
->end
, code
);
11928 resolve_branch (code
->ext
.wait
->eor
, code
);
11933 if (!gfc_resolve_dt (code
->ext
.dt
, &code
->loc
))
11936 resolve_branch (code
->ext
.dt
->err
, code
);
11937 resolve_branch (code
->ext
.dt
->end
, code
);
11938 resolve_branch (code
->ext
.dt
->eor
, code
);
11941 case EXEC_TRANSFER
:
11942 resolve_transfer (code
);
11945 case EXEC_DO_CONCURRENT
:
11947 resolve_forall_iterators (code
->ext
.forall_iterator
);
11949 if (code
->expr1
!= NULL
11950 && (code
->expr1
->ts
.type
!= BT_LOGICAL
|| code
->expr1
->rank
))
11951 gfc_error ("FORALL mask clause at %L requires a scalar LOGICAL "
11952 "expression", &code
->expr1
->where
);
11955 case EXEC_OACC_PARALLEL_LOOP
:
11956 case EXEC_OACC_PARALLEL
:
11957 case EXEC_OACC_KERNELS_LOOP
:
11958 case EXEC_OACC_KERNELS
:
11959 case EXEC_OACC_SERIAL_LOOP
:
11960 case EXEC_OACC_SERIAL
:
11961 case EXEC_OACC_DATA
:
11962 case EXEC_OACC_HOST_DATA
:
11963 case EXEC_OACC_LOOP
:
11964 case EXEC_OACC_UPDATE
:
11965 case EXEC_OACC_WAIT
:
11966 case EXEC_OACC_CACHE
:
11967 case EXEC_OACC_ENTER_DATA
:
11968 case EXEC_OACC_EXIT_DATA
:
11969 case EXEC_OACC_ATOMIC
:
11970 case EXEC_OACC_DECLARE
:
11971 gfc_resolve_oacc_directive (code
, ns
);
11974 case EXEC_OMP_ATOMIC
:
11975 case EXEC_OMP_BARRIER
:
11976 case EXEC_OMP_CANCEL
:
11977 case EXEC_OMP_CANCELLATION_POINT
:
11978 case EXEC_OMP_CRITICAL
:
11979 case EXEC_OMP_FLUSH
:
11980 case EXEC_OMP_DISTRIBUTE
:
11981 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
11982 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
11983 case EXEC_OMP_DISTRIBUTE_SIMD
:
11985 case EXEC_OMP_DO_SIMD
:
11986 case EXEC_OMP_MASTER
:
11987 case EXEC_OMP_ORDERED
:
11988 case EXEC_OMP_SECTIONS
:
11989 case EXEC_OMP_SIMD
:
11990 case EXEC_OMP_SINGLE
:
11991 case EXEC_OMP_TARGET
:
11992 case EXEC_OMP_TARGET_DATA
:
11993 case EXEC_OMP_TARGET_ENTER_DATA
:
11994 case EXEC_OMP_TARGET_EXIT_DATA
:
11995 case EXEC_OMP_TARGET_PARALLEL
:
11996 case EXEC_OMP_TARGET_PARALLEL_DO
:
11997 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11998 case EXEC_OMP_TARGET_SIMD
:
11999 case EXEC_OMP_TARGET_TEAMS
:
12000 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
12001 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
12002 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
12003 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
12004 case EXEC_OMP_TARGET_UPDATE
:
12005 case EXEC_OMP_TASK
:
12006 case EXEC_OMP_TASKGROUP
:
12007 case EXEC_OMP_TASKLOOP
:
12008 case EXEC_OMP_TASKLOOP_SIMD
:
12009 case EXEC_OMP_TASKWAIT
:
12010 case EXEC_OMP_TASKYIELD
:
12011 case EXEC_OMP_TEAMS
:
12012 case EXEC_OMP_TEAMS_DISTRIBUTE
:
12013 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
12014 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
12015 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
12016 case EXEC_OMP_WORKSHARE
:
12017 gfc_resolve_omp_directive (code
, ns
);
12020 case EXEC_OMP_PARALLEL
:
12021 case EXEC_OMP_PARALLEL_DO
:
12022 case EXEC_OMP_PARALLEL_DO_SIMD
:
12023 case EXEC_OMP_PARALLEL_SECTIONS
:
12024 case EXEC_OMP_PARALLEL_WORKSHARE
:
12025 omp_workshare_save
= omp_workshare_flag
;
12026 omp_workshare_flag
= 0;
12027 gfc_resolve_omp_directive (code
, ns
);
12028 omp_workshare_flag
= omp_workshare_save
;
12032 gfc_internal_error ("gfc_resolve_code(): Bad statement code");
12036 cs_base
= frame
.prev
;
12040 /* Resolve initial values and make sure they are compatible with
12044 resolve_values (gfc_symbol
*sym
)
12048 if (sym
->value
== NULL
)
12051 if (sym
->value
->expr_type
== EXPR_STRUCTURE
)
12052 t
= resolve_structure_cons (sym
->value
, 1);
12054 t
= gfc_resolve_expr (sym
->value
);
12059 gfc_check_assign_symbol (sym
, NULL
, sym
->value
);
12063 /* Verify any BIND(C) derived types in the namespace so we can report errors
12064 for them once, rather than for each variable declared of that type. */
12067 resolve_bind_c_derived_types (gfc_symbol
*derived_sym
)
12069 if (derived_sym
!= NULL
&& derived_sym
->attr
.flavor
== FL_DERIVED
12070 && derived_sym
->attr
.is_bind_c
== 1)
12071 verify_bind_c_derived_type (derived_sym
);
12077 /* Check the interfaces of DTIO procedures associated with derived
12078 type 'sym'. These procedures can either have typebound bindings or
12079 can appear in DTIO generic interfaces. */
12082 gfc_verify_DTIO_procedures (gfc_symbol
*sym
)
12084 if (!sym
|| sym
->attr
.flavor
!= FL_DERIVED
)
12087 gfc_check_dtio_interfaces (sym
);
12092 /* Verify that any binding labels used in a given namespace do not collide
12093 with the names or binding labels of any global symbols. Multiple INTERFACE
12094 for the same procedure are permitted. */
12097 gfc_verify_binding_labels (gfc_symbol
*sym
)
12100 const char *module
;
12102 if (!sym
|| !sym
->attr
.is_bind_c
|| sym
->attr
.is_iso_c
12103 || sym
->attr
.flavor
== FL_DERIVED
|| !sym
->binding_label
)
12106 gsym
= gfc_find_case_gsymbol (gfc_gsym_root
, sym
->binding_label
);
12109 module
= sym
->module
;
12110 else if (sym
->ns
&& sym
->ns
->proc_name
12111 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
12112 module
= sym
->ns
->proc_name
->name
;
12113 else if (sym
->ns
&& sym
->ns
->parent
12114 && sym
->ns
&& sym
->ns
->parent
->proc_name
12115 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12116 module
= sym
->ns
->parent
->proc_name
->name
;
12122 && (gsym
->type
== GSYM_FUNCTION
|| gsym
->type
== GSYM_SUBROUTINE
)))
12125 gsym
= gfc_get_gsymbol (sym
->binding_label
, true);
12126 gsym
->where
= sym
->declared_at
;
12127 gsym
->sym_name
= sym
->name
;
12128 gsym
->binding_label
= sym
->binding_label
;
12129 gsym
->ns
= sym
->ns
;
12130 gsym
->mod_name
= module
;
12131 if (sym
->attr
.function
)
12132 gsym
->type
= GSYM_FUNCTION
;
12133 else if (sym
->attr
.subroutine
)
12134 gsym
->type
= GSYM_SUBROUTINE
;
12135 /* Mark as variable/procedure as defined, unless its an INTERFACE. */
12136 gsym
->defined
= sym
->attr
.if_source
!= IFSRC_IFBODY
;
12140 if (sym
->attr
.flavor
== FL_VARIABLE
&& gsym
->type
!= GSYM_UNKNOWN
)
12142 gfc_error ("Variable %qs with binding label %qs at %L uses the same global "
12143 "identifier as entity at %L", sym
->name
,
12144 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
12145 /* Clear the binding label to prevent checking multiple times. */
12146 sym
->binding_label
= NULL
;
12150 if (sym
->attr
.flavor
== FL_VARIABLE
&& module
12151 && (strcmp (module
, gsym
->mod_name
) != 0
12152 || strcmp (sym
->name
, gsym
->sym_name
) != 0))
12154 /* This can only happen if the variable is defined in a module - if it
12155 isn't the same module, reject it. */
12156 gfc_error ("Variable %qs from module %qs with binding label %qs at %L "
12157 "uses the same global identifier as entity at %L from module %qs",
12158 sym
->name
, module
, sym
->binding_label
,
12159 &sym
->declared_at
, &gsym
->where
, gsym
->mod_name
);
12160 sym
->binding_label
= NULL
;
12164 if ((sym
->attr
.function
|| sym
->attr
.subroutine
)
12165 && ((gsym
->type
!= GSYM_SUBROUTINE
&& gsym
->type
!= GSYM_FUNCTION
)
12166 || (gsym
->defined
&& sym
->attr
.if_source
!= IFSRC_IFBODY
))
12167 && (sym
!= gsym
->ns
->proc_name
&& sym
->attr
.entry
== 0)
12168 && (module
!= gsym
->mod_name
12169 || strcmp (gsym
->sym_name
, sym
->name
) != 0
12170 || (module
&& strcmp (module
, gsym
->mod_name
) != 0)))
12172 /* Print an error if the procedure is defined multiple times; we have to
12173 exclude references to the same procedure via module association or
12174 multiple checks for the same procedure. */
12175 gfc_error ("Procedure %qs with binding label %qs at %L uses the same "
12176 "global identifier as entity at %L", sym
->name
,
12177 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
12178 sym
->binding_label
= NULL
;
12183 /* Resolve an index expression. */
12186 resolve_index_expr (gfc_expr
*e
)
12188 if (!gfc_resolve_expr (e
))
12191 if (!gfc_simplify_expr (e
, 0))
12194 if (!gfc_specification_expr (e
))
12201 /* Resolve a charlen structure. */
12204 resolve_charlen (gfc_charlen
*cl
)
12207 bool saved_specification_expr
;
12213 saved_specification_expr
= specification_expr
;
12214 specification_expr
= true;
12216 if (cl
->length_from_typespec
)
12218 if (!gfc_resolve_expr (cl
->length
))
12220 specification_expr
= saved_specification_expr
;
12224 if (!gfc_simplify_expr (cl
->length
, 0))
12226 specification_expr
= saved_specification_expr
;
12230 /* cl->length has been resolved. It should have an integer type. */
12231 if (cl
->length
->ts
.type
!= BT_INTEGER
)
12233 gfc_error ("Scalar INTEGER expression expected at %L",
12234 &cl
->length
->where
);
12240 if (!resolve_index_expr (cl
->length
))
12242 specification_expr
= saved_specification_expr
;
12247 /* F2008, 4.4.3.2: If the character length parameter value evaluates to
12248 a negative value, the length of character entities declared is zero. */
12249 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
12250 && mpz_sgn (cl
->length
->value
.integer
) < 0)
12251 gfc_replace_expr (cl
->length
,
12252 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 0));
12254 /* Check that the character length is not too large. */
12255 k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
12256 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
12257 && cl
->length
->ts
.type
== BT_INTEGER
12258 && mpz_cmp (cl
->length
->value
.integer
, gfc_integer_kinds
[k
].huge
) > 0)
12260 gfc_error ("String length at %L is too large", &cl
->length
->where
);
12261 specification_expr
= saved_specification_expr
;
12265 specification_expr
= saved_specification_expr
;
12270 /* Test for non-constant shape arrays. */
12273 is_non_constant_shape_array (gfc_symbol
*sym
)
12279 not_constant
= false;
12280 if (sym
->as
!= NULL
)
12282 /* Unfortunately, !gfc_is_compile_time_shape hits a legal case that
12283 has not been simplified; parameter array references. Do the
12284 simplification now. */
12285 for (i
= 0; i
< sym
->as
->rank
+ sym
->as
->corank
; i
++)
12287 if (i
== GFC_MAX_DIMENSIONS
)
12290 e
= sym
->as
->lower
[i
];
12291 if (e
&& (!resolve_index_expr(e
)
12292 || !gfc_is_constant_expr (e
)))
12293 not_constant
= true;
12294 e
= sym
->as
->upper
[i
];
12295 if (e
&& (!resolve_index_expr(e
)
12296 || !gfc_is_constant_expr (e
)))
12297 not_constant
= true;
12300 return not_constant
;
12303 /* Given a symbol and an initialization expression, add code to initialize
12304 the symbol to the function entry. */
12306 build_init_assign (gfc_symbol
*sym
, gfc_expr
*init
)
12310 gfc_namespace
*ns
= sym
->ns
;
12312 /* Search for the function namespace if this is a contained
12313 function without an explicit result. */
12314 if (sym
->attr
.function
&& sym
== sym
->result
12315 && sym
->name
!= sym
->ns
->proc_name
->name
)
12317 ns
= ns
->contained
;
12318 for (;ns
; ns
= ns
->sibling
)
12319 if (strcmp (ns
->proc_name
->name
, sym
->name
) == 0)
12325 gfc_free_expr (init
);
12329 /* Build an l-value expression for the result. */
12330 lval
= gfc_lval_expr_from_sym (sym
);
12332 /* Add the code at scope entry. */
12333 init_st
= gfc_get_code (EXEC_INIT_ASSIGN
);
12334 init_st
->next
= ns
->code
;
12335 ns
->code
= init_st
;
12337 /* Assign the default initializer to the l-value. */
12338 init_st
->loc
= sym
->declared_at
;
12339 init_st
->expr1
= lval
;
12340 init_st
->expr2
= init
;
12344 /* Whether or not we can generate a default initializer for a symbol. */
12347 can_generate_init (gfc_symbol
*sym
)
12349 symbol_attribute
*a
;
12354 /* These symbols should never have a default initialization. */
12359 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
12360 && (CLASS_DATA (sym
)->attr
.class_pointer
12361 || CLASS_DATA (sym
)->attr
.proc_pointer
))
12362 || a
->in_equivalence
12369 || (!a
->referenced
&& !a
->result
)
12370 || (a
->dummy
&& a
->intent
!= INTENT_OUT
)
12371 || (a
->function
&& sym
!= sym
->result
)
12376 /* Assign the default initializer to a derived type variable or result. */
12379 apply_default_init (gfc_symbol
*sym
)
12381 gfc_expr
*init
= NULL
;
12383 if (sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12386 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
)
12387 init
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12389 if (init
== NULL
&& sym
->ts
.type
!= BT_CLASS
)
12392 build_init_assign (sym
, init
);
12393 sym
->attr
.referenced
= 1;
12397 /* Build an initializer for a local. Returns null if the symbol should not have
12398 a default initialization. */
12401 build_default_init_expr (gfc_symbol
*sym
)
12403 /* These symbols should never have a default initialization. */
12404 if (sym
->attr
.allocatable
12405 || sym
->attr
.external
12407 || sym
->attr
.pointer
12408 || sym
->attr
.in_equivalence
12409 || sym
->attr
.in_common
12412 || sym
->attr
.cray_pointee
12413 || sym
->attr
.cray_pointer
12417 /* Get the appropriate init expression. */
12418 return gfc_build_default_init_expr (&sym
->ts
, &sym
->declared_at
);
12421 /* Add an initialization expression to a local variable. */
12423 apply_default_init_local (gfc_symbol
*sym
)
12425 gfc_expr
*init
= NULL
;
12427 /* The symbol should be a variable or a function return value. */
12428 if ((sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12429 || (sym
->attr
.function
&& sym
->result
!= sym
))
12432 /* Try to build the initializer expression. If we can't initialize
12433 this symbol, then init will be NULL. */
12434 init
= build_default_init_expr (sym
);
12438 /* For saved variables, we don't want to add an initializer at function
12439 entry, so we just add a static initializer. Note that automatic variables
12440 are stack allocated even with -fno-automatic; we have also to exclude
12441 result variable, which are also nonstatic. */
12442 if (!sym
->attr
.automatic
12443 && (sym
->attr
.save
|| sym
->ns
->save_all
12444 || (flag_max_stack_var_size
== 0 && !sym
->attr
.result
12445 && (sym
->ns
->proc_name
&& !sym
->ns
->proc_name
->attr
.recursive
)
12446 && (!sym
->attr
.dimension
|| !is_non_constant_shape_array (sym
)))))
12448 /* Don't clobber an existing initializer! */
12449 gcc_assert (sym
->value
== NULL
);
12454 build_init_assign (sym
, init
);
12458 /* Resolution of common features of flavors variable and procedure. */
12461 resolve_fl_var_and_proc (gfc_symbol
*sym
, int mp_flag
)
12463 gfc_array_spec
*as
;
12465 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12466 as
= CLASS_DATA (sym
)->as
;
12470 /* Constraints on deferred shape variable. */
12471 if (as
== NULL
|| as
->type
!= AS_DEFERRED
)
12473 bool pointer
, allocatable
, dimension
;
12475 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12477 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
12478 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
12479 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
12483 pointer
= sym
->attr
.pointer
&& !sym
->attr
.select_type_temporary
;
12484 allocatable
= sym
->attr
.allocatable
;
12485 dimension
= sym
->attr
.dimension
;
12490 if (dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12492 gfc_error ("Allocatable array %qs at %L must have a deferred "
12493 "shape or assumed rank", sym
->name
, &sym
->declared_at
);
12496 else if (!gfc_notify_std (GFC_STD_F2003
, "Scalar object "
12497 "%qs at %L may not be ALLOCATABLE",
12498 sym
->name
, &sym
->declared_at
))
12502 if (pointer
&& dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12504 gfc_error ("Array pointer %qs at %L must have a deferred shape or "
12505 "assumed rank", sym
->name
, &sym
->declared_at
);
12511 if (!mp_flag
&& !sym
->attr
.allocatable
&& !sym
->attr
.pointer
12512 && sym
->ts
.type
!= BT_CLASS
&& !sym
->assoc
)
12514 gfc_error ("Array %qs at %L cannot have a deferred shape",
12515 sym
->name
, &sym
->declared_at
);
12520 /* Constraints on polymorphic variables. */
12521 if (sym
->ts
.type
== BT_CLASS
&& !(sym
->result
&& sym
->result
!= sym
))
12524 if (sym
->attr
.class_ok
12525 && !sym
->attr
.select_type_temporary
12526 && !UNLIMITED_POLY (sym
)
12527 && !gfc_type_is_extensible (CLASS_DATA (sym
)->ts
.u
.derived
))
12529 gfc_error ("Type %qs of CLASS variable %qs at %L is not extensible",
12530 CLASS_DATA (sym
)->ts
.u
.derived
->name
, sym
->name
,
12531 &sym
->declared_at
);
12536 /* Assume that use associated symbols were checked in the module ns.
12537 Class-variables that are associate-names are also something special
12538 and excepted from the test. */
12539 if (!sym
->attr
.class_ok
&& !sym
->attr
.use_assoc
&& !sym
->assoc
)
12541 gfc_error ("CLASS variable %qs at %L must be dummy, allocatable "
12542 "or pointer", sym
->name
, &sym
->declared_at
);
12551 /* Additional checks for symbols with flavor variable and derived
12552 type. To be called from resolve_fl_variable. */
12555 resolve_fl_variable_derived (gfc_symbol
*sym
, int no_init_flag
)
12557 gcc_assert (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
);
12559 /* Check to see if a derived type is blocked from being host
12560 associated by the presence of another class I symbol in the same
12561 namespace. 14.6.1.3 of the standard and the discussion on
12562 comp.lang.fortran. */
12563 if (sym
->ns
!= sym
->ts
.u
.derived
->ns
12564 && !sym
->ts
.u
.derived
->attr
.use_assoc
12565 && sym
->ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
12568 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 0, &s
);
12569 if (s
&& s
->attr
.generic
)
12570 s
= gfc_find_dt_in_generic (s
);
12571 if (s
&& !gfc_fl_struct (s
->attr
.flavor
))
12573 gfc_error ("The type %qs cannot be host associated at %L "
12574 "because it is blocked by an incompatible object "
12575 "of the same name declared at %L",
12576 sym
->ts
.u
.derived
->name
, &sym
->declared_at
,
12582 /* 4th constraint in section 11.3: "If an object of a type for which
12583 component-initialization is specified (R429) appears in the
12584 specification-part of a module and does not have the ALLOCATABLE
12585 or POINTER attribute, the object shall have the SAVE attribute."
12587 The check for initializers is performed with
12588 gfc_has_default_initializer because gfc_default_initializer generates
12589 a hidden default for allocatable components. */
12590 if (!(sym
->value
|| no_init_flag
) && sym
->ns
->proc_name
12591 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12592 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
) && !sym
->attr
.save
12593 && !sym
->attr
.pointer
&& !sym
->attr
.allocatable
12594 && gfc_has_default_initializer (sym
->ts
.u
.derived
)
12595 && !gfc_notify_std (GFC_STD_F2008
, "Implied SAVE for module variable "
12596 "%qs at %L, needed due to the default "
12597 "initialization", sym
->name
, &sym
->declared_at
))
12600 /* Assign default initializer. */
12601 if (!(sym
->value
|| sym
->attr
.pointer
|| sym
->attr
.allocatable
)
12602 && (!no_init_flag
|| sym
->attr
.intent
== INTENT_OUT
))
12603 sym
->value
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12609 /* F2008, C402 (R401): A colon shall not be used as a type-param-value
12610 except in the declaration of an entity or component that has the POINTER
12611 or ALLOCATABLE attribute. */
12614 deferred_requirements (gfc_symbol
*sym
)
12616 if (sym
->ts
.deferred
12617 && !(sym
->attr
.pointer
12618 || sym
->attr
.allocatable
12619 || sym
->attr
.associate_var
12620 || sym
->attr
.omp_udr_artificial_var
))
12622 /* If a function has a result variable, only check the variable. */
12623 if (sym
->result
&& sym
->name
!= sym
->result
->name
)
12626 gfc_error ("Entity %qs at %L has a deferred type parameter and "
12627 "requires either the POINTER or ALLOCATABLE attribute",
12628 sym
->name
, &sym
->declared_at
);
12635 /* Resolve symbols with flavor variable. */
12638 resolve_fl_variable (gfc_symbol
*sym
, int mp_flag
)
12640 const char *auto_save_msg
= "Automatic object %qs at %L cannot have the "
12643 if (!resolve_fl_var_and_proc (sym
, mp_flag
))
12646 /* Set this flag to check that variables are parameters of all entries.
12647 This check is effected by the call to gfc_resolve_expr through
12648 is_non_constant_shape_array. */
12649 bool saved_specification_expr
= specification_expr
;
12650 specification_expr
= true;
12652 if (sym
->ns
->proc_name
12653 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12654 || sym
->ns
->proc_name
->attr
.is_main_program
)
12655 && !sym
->attr
.use_assoc
12656 && !sym
->attr
.allocatable
12657 && !sym
->attr
.pointer
12658 && is_non_constant_shape_array (sym
))
12660 /* F08:C541. The shape of an array defined in a main program or module
12661 * needs to be constant. */
12662 gfc_error ("The module or main program array %qs at %L must "
12663 "have constant shape", sym
->name
, &sym
->declared_at
);
12664 specification_expr
= saved_specification_expr
;
12668 /* Constraints on deferred type parameter. */
12669 if (!deferred_requirements (sym
))
12672 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.associate_var
)
12674 /* Make sure that character string variables with assumed length are
12675 dummy arguments. */
12676 gfc_expr
*e
= NULL
;
12679 e
= sym
->ts
.u
.cl
->length
;
12683 if (e
== NULL
&& !sym
->attr
.dummy
&& !sym
->attr
.result
12684 && !sym
->ts
.deferred
&& !sym
->attr
.select_type_temporary
12685 && !sym
->attr
.omp_udr_artificial_var
)
12687 gfc_error ("Entity with assumed character length at %L must be a "
12688 "dummy argument or a PARAMETER", &sym
->declared_at
);
12689 specification_expr
= saved_specification_expr
;
12693 if (e
&& sym
->attr
.save
== SAVE_EXPLICIT
&& !gfc_is_constant_expr (e
))
12695 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12696 specification_expr
= saved_specification_expr
;
12700 if (!gfc_is_constant_expr (e
)
12701 && !(e
->expr_type
== EXPR_VARIABLE
12702 && e
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
))
12704 if (!sym
->attr
.use_assoc
&& sym
->ns
->proc_name
12705 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12706 || sym
->ns
->proc_name
->attr
.is_main_program
))
12708 gfc_error ("%qs at %L must have constant character length "
12709 "in this context", sym
->name
, &sym
->declared_at
);
12710 specification_expr
= saved_specification_expr
;
12713 if (sym
->attr
.in_common
)
12715 gfc_error ("COMMON variable %qs at %L must have constant "
12716 "character length", sym
->name
, &sym
->declared_at
);
12717 specification_expr
= saved_specification_expr
;
12723 if (sym
->value
== NULL
&& sym
->attr
.referenced
)
12724 apply_default_init_local (sym
); /* Try to apply a default initialization. */
12726 /* Determine if the symbol may not have an initializer. */
12727 int no_init_flag
= 0, automatic_flag
= 0;
12728 if (sym
->attr
.allocatable
|| sym
->attr
.external
|| sym
->attr
.dummy
12729 || sym
->attr
.intrinsic
|| sym
->attr
.result
)
12731 else if ((sym
->attr
.dimension
|| sym
->attr
.codimension
) && !sym
->attr
.pointer
12732 && is_non_constant_shape_array (sym
))
12734 no_init_flag
= automatic_flag
= 1;
12736 /* Also, they must not have the SAVE attribute.
12737 SAVE_IMPLICIT is checked below. */
12738 if (sym
->as
&& sym
->attr
.codimension
)
12740 int corank
= sym
->as
->corank
;
12741 sym
->as
->corank
= 0;
12742 no_init_flag
= automatic_flag
= is_non_constant_shape_array (sym
);
12743 sym
->as
->corank
= corank
;
12745 if (automatic_flag
&& sym
->attr
.save
== SAVE_EXPLICIT
)
12747 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12748 specification_expr
= saved_specification_expr
;
12753 /* Ensure that any initializer is simplified. */
12755 gfc_simplify_expr (sym
->value
, 1);
12757 /* Reject illegal initializers. */
12758 if (!sym
->mark
&& sym
->value
)
12760 if (sym
->attr
.allocatable
|| (sym
->ts
.type
== BT_CLASS
12761 && CLASS_DATA (sym
)->attr
.allocatable
))
12762 gfc_error ("Allocatable %qs at %L cannot have an initializer",
12763 sym
->name
, &sym
->declared_at
);
12764 else if (sym
->attr
.external
)
12765 gfc_error ("External %qs at %L cannot have an initializer",
12766 sym
->name
, &sym
->declared_at
);
12767 else if (sym
->attr
.dummy
12768 && !(sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.intent
== INTENT_OUT
))
12769 gfc_error ("Dummy %qs at %L cannot have an initializer",
12770 sym
->name
, &sym
->declared_at
);
12771 else if (sym
->attr
.intrinsic
)
12772 gfc_error ("Intrinsic %qs at %L cannot have an initializer",
12773 sym
->name
, &sym
->declared_at
);
12774 else if (sym
->attr
.result
)
12775 gfc_error ("Function result %qs at %L cannot have an initializer",
12776 sym
->name
, &sym
->declared_at
);
12777 else if (automatic_flag
)
12778 gfc_error ("Automatic array %qs at %L cannot have an initializer",
12779 sym
->name
, &sym
->declared_at
);
12781 goto no_init_error
;
12782 specification_expr
= saved_specification_expr
;
12787 if (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
)
12789 bool res
= resolve_fl_variable_derived (sym
, no_init_flag
);
12790 specification_expr
= saved_specification_expr
;
12794 specification_expr
= saved_specification_expr
;
12799 /* Compare the dummy characteristics of a module procedure interface
12800 declaration with the corresponding declaration in a submodule. */
12801 static gfc_formal_arglist
*new_formal
;
12802 static char errmsg
[200];
12805 compare_fsyms (gfc_symbol
*sym
)
12809 if (sym
== NULL
|| new_formal
== NULL
)
12812 fsym
= new_formal
->sym
;
12817 if (strcmp (sym
->name
, fsym
->name
) == 0)
12819 if (!gfc_check_dummy_characteristics (fsym
, sym
, true, errmsg
, 200))
12820 gfc_error ("%s at %L", errmsg
, &fsym
->declared_at
);
12825 /* Resolve a procedure. */
12828 resolve_fl_procedure (gfc_symbol
*sym
, int mp_flag
)
12830 gfc_formal_arglist
*arg
;
12832 if (sym
->attr
.function
12833 && !resolve_fl_var_and_proc (sym
, mp_flag
))
12836 /* Constraints on deferred type parameter. */
12837 if (!deferred_requirements (sym
))
12840 if (sym
->ts
.type
== BT_CHARACTER
)
12842 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
12844 if (cl
&& cl
->length
&& gfc_is_constant_expr (cl
->length
)
12845 && !resolve_charlen (cl
))
12848 if ((!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
12849 && sym
->attr
.proc
== PROC_ST_FUNCTION
)
12851 gfc_error ("Character-valued statement function %qs at %L must "
12852 "have constant length", sym
->name
, &sym
->declared_at
);
12857 /* Ensure that derived type for are not of a private type. Internal
12858 module procedures are excluded by 2.2.3.3 - i.e., they are not
12859 externally accessible and can access all the objects accessible in
12861 if (!(sym
->ns
->parent
&& sym
->ns
->parent
->proc_name
12862 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12863 && gfc_check_symbol_access (sym
))
12865 gfc_interface
*iface
;
12867 for (arg
= gfc_sym_get_dummy_args (sym
); arg
; arg
= arg
->next
)
12870 && arg
->sym
->ts
.type
== BT_DERIVED
12871 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12872 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12873 && !gfc_notify_std (GFC_STD_F2003
, "%qs is of a PRIVATE type "
12874 "and cannot be a dummy argument"
12875 " of %qs, which is PUBLIC at %L",
12876 arg
->sym
->name
, sym
->name
,
12877 &sym
->declared_at
))
12879 /* Stop this message from recurring. */
12880 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12885 /* PUBLIC interfaces may expose PRIVATE procedures that take types
12886 PRIVATE to the containing module. */
12887 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
12889 for (arg
= gfc_sym_get_dummy_args (iface
->sym
); arg
; arg
= arg
->next
)
12892 && arg
->sym
->ts
.type
== BT_DERIVED
12893 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12894 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12895 && !gfc_notify_std (GFC_STD_F2003
, "Procedure %qs in "
12896 "PUBLIC interface %qs at %L "
12897 "takes dummy arguments of %qs which "
12898 "is PRIVATE", iface
->sym
->name
,
12899 sym
->name
, &iface
->sym
->declared_at
,
12900 gfc_typename(&arg
->sym
->ts
)))
12902 /* Stop this message from recurring. */
12903 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12910 if (sym
->attr
.function
&& sym
->value
&& sym
->attr
.proc
!= PROC_ST_FUNCTION
12911 && !sym
->attr
.proc_pointer
)
12913 gfc_error ("Function %qs at %L cannot have an initializer",
12914 sym
->name
, &sym
->declared_at
);
12916 /* Make sure no second error is issued for this. */
12917 sym
->value
->error
= 1;
12921 /* An external symbol may not have an initializer because it is taken to be
12922 a procedure. Exception: Procedure Pointers. */
12923 if (sym
->attr
.external
&& sym
->value
&& !sym
->attr
.proc_pointer
)
12925 gfc_error ("External object %qs at %L may not have an initializer",
12926 sym
->name
, &sym
->declared_at
);
12930 /* An elemental function is required to return a scalar 12.7.1 */
12931 if (sym
->attr
.elemental
&& sym
->attr
.function
12932 && (sym
->as
|| (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)))
12934 gfc_error ("ELEMENTAL function %qs at %L must have a scalar "
12935 "result", sym
->name
, &sym
->declared_at
);
12936 /* Reset so that the error only occurs once. */
12937 sym
->attr
.elemental
= 0;
12941 if (sym
->attr
.proc
== PROC_ST_FUNCTION
12942 && (sym
->attr
.allocatable
|| sym
->attr
.pointer
))
12944 gfc_error ("Statement function %qs at %L may not have pointer or "
12945 "allocatable attribute", sym
->name
, &sym
->declared_at
);
12949 /* 5.1.1.5 of the Standard: A function name declared with an asterisk
12950 char-len-param shall not be array-valued, pointer-valued, recursive
12951 or pure. ....snip... A character value of * may only be used in the
12952 following ways: (i) Dummy arg of procedure - dummy associates with
12953 actual length; (ii) To declare a named constant; or (iii) External
12954 function - but length must be declared in calling scoping unit. */
12955 if (sym
->attr
.function
12956 && sym
->ts
.type
== BT_CHARACTER
&& !sym
->ts
.deferred
12957 && sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
== NULL
)
12959 if ((sym
->as
&& sym
->as
->rank
) || (sym
->attr
.pointer
)
12960 || (sym
->attr
.recursive
) || (sym
->attr
.pure
))
12962 if (sym
->as
&& sym
->as
->rank
)
12963 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12964 "array-valued", sym
->name
, &sym
->declared_at
);
12966 if (sym
->attr
.pointer
)
12967 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12968 "pointer-valued", sym
->name
, &sym
->declared_at
);
12970 if (sym
->attr
.pure
)
12971 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12972 "pure", sym
->name
, &sym
->declared_at
);
12974 if (sym
->attr
.recursive
)
12975 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12976 "recursive", sym
->name
, &sym
->declared_at
);
12981 /* Appendix B.2 of the standard. Contained functions give an
12982 error anyway. Deferred character length is an F2003 feature.
12983 Don't warn on intrinsic conversion functions, which start
12984 with two underscores. */
12985 if (!sym
->attr
.contained
&& !sym
->ts
.deferred
12986 && (sym
->name
[0] != '_' || sym
->name
[1] != '_'))
12987 gfc_notify_std (GFC_STD_F95_OBS
,
12988 "CHARACTER(*) function %qs at %L",
12989 sym
->name
, &sym
->declared_at
);
12992 /* F2008, C1218. */
12993 if (sym
->attr
.elemental
)
12995 if (sym
->attr
.proc_pointer
)
12997 gfc_error ("Procedure pointer %qs at %L shall not be elemental",
12998 sym
->name
, &sym
->declared_at
);
13001 if (sym
->attr
.dummy
)
13003 gfc_error ("Dummy procedure %qs at %L shall not be elemental",
13004 sym
->name
, &sym
->declared_at
);
13009 /* F2018, C15100: "The result of an elemental function shall be scalar,
13010 and shall not have the POINTER or ALLOCATABLE attribute." The scalar
13011 pointer is tested and caught elsewhere. */
13012 if (sym
->attr
.elemental
&& sym
->result
13013 && (sym
->result
->attr
.allocatable
|| sym
->result
->attr
.pointer
))
13015 gfc_error ("Function result variable %qs at %L of elemental "
13016 "function %qs shall not have an ALLOCATABLE or POINTER "
13017 "attribute", sym
->result
->name
,
13018 &sym
->result
->declared_at
, sym
->name
);
13022 if (sym
->attr
.is_bind_c
&& sym
->attr
.is_c_interop
!= 1)
13024 gfc_formal_arglist
*curr_arg
;
13025 int has_non_interop_arg
= 0;
13027 if (!verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
13028 sym
->common_block
))
13030 /* Clear these to prevent looking at them again if there was an
13032 sym
->attr
.is_bind_c
= 0;
13033 sym
->attr
.is_c_interop
= 0;
13034 sym
->ts
.is_c_interop
= 0;
13038 /* So far, no errors have been found. */
13039 sym
->attr
.is_c_interop
= 1;
13040 sym
->ts
.is_c_interop
= 1;
13043 curr_arg
= gfc_sym_get_dummy_args (sym
);
13044 while (curr_arg
!= NULL
)
13046 /* Skip implicitly typed dummy args here. */
13047 if (curr_arg
->sym
&& curr_arg
->sym
->attr
.implicit_type
== 0)
13048 if (!gfc_verify_c_interop_param (curr_arg
->sym
))
13049 /* If something is found to fail, record the fact so we
13050 can mark the symbol for the procedure as not being
13051 BIND(C) to try and prevent multiple errors being
13053 has_non_interop_arg
= 1;
13055 curr_arg
= curr_arg
->next
;
13058 /* See if any of the arguments were not interoperable and if so, clear
13059 the procedure symbol to prevent duplicate error messages. */
13060 if (has_non_interop_arg
!= 0)
13062 sym
->attr
.is_c_interop
= 0;
13063 sym
->ts
.is_c_interop
= 0;
13064 sym
->attr
.is_bind_c
= 0;
13068 if (!sym
->attr
.proc_pointer
)
13070 if (sym
->attr
.save
== SAVE_EXPLICIT
)
13072 gfc_error ("PROCEDURE attribute conflicts with SAVE attribute "
13073 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13076 if (sym
->attr
.intent
)
13078 gfc_error ("PROCEDURE attribute conflicts with INTENT attribute "
13079 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13082 if (sym
->attr
.subroutine
&& sym
->attr
.result
)
13084 gfc_error ("PROCEDURE attribute conflicts with RESULT attribute "
13085 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13088 if (sym
->attr
.external
&& sym
->attr
.function
&& !sym
->attr
.module_procedure
13089 && ((sym
->attr
.if_source
== IFSRC_DECL
&& !sym
->attr
.procedure
)
13090 || sym
->attr
.contained
))
13092 gfc_error ("EXTERNAL attribute conflicts with FUNCTION attribute "
13093 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13096 if (strcmp ("ppr@", sym
->name
) == 0)
13098 gfc_error ("Procedure pointer result %qs at %L "
13099 "is missing the pointer attribute",
13100 sym
->ns
->proc_name
->name
, &sym
->declared_at
);
13105 /* Assume that a procedure whose body is not known has references
13106 to external arrays. */
13107 if (sym
->attr
.if_source
!= IFSRC_DECL
)
13108 sym
->attr
.array_outer_dependency
= 1;
13110 /* Compare the characteristics of a module procedure with the
13111 interface declaration. Ideally this would be done with
13112 gfc_compare_interfaces but, at present, the formal interface
13113 cannot be copied to the ts.interface. */
13114 if (sym
->attr
.module_procedure
13115 && sym
->attr
.if_source
== IFSRC_DECL
)
13118 char name
[2*GFC_MAX_SYMBOL_LEN
+ 1];
13120 char *submodule_name
;
13121 strcpy (name
, sym
->ns
->proc_name
->name
);
13122 module_name
= strtok (name
, ".");
13123 submodule_name
= strtok (NULL
, ".");
13125 iface
= sym
->tlink
;
13128 /* Make sure that the result uses the correct charlen for deferred
13130 if (iface
&& sym
->result
13131 && iface
->ts
.type
== BT_CHARACTER
13132 && iface
->ts
.deferred
)
13133 sym
->result
->ts
.u
.cl
= iface
->ts
.u
.cl
;
13138 /* Check the procedure characteristics. */
13139 if (sym
->attr
.elemental
!= iface
->attr
.elemental
)
13141 gfc_error ("Mismatch in ELEMENTAL attribute between MODULE "
13142 "PROCEDURE at %L and its interface in %s",
13143 &sym
->declared_at
, module_name
);
13147 if (sym
->attr
.pure
!= iface
->attr
.pure
)
13149 gfc_error ("Mismatch in PURE attribute between MODULE "
13150 "PROCEDURE at %L and its interface in %s",
13151 &sym
->declared_at
, module_name
);
13155 if (sym
->attr
.recursive
!= iface
->attr
.recursive
)
13157 gfc_error ("Mismatch in RECURSIVE attribute between MODULE "
13158 "PROCEDURE at %L and its interface in %s",
13159 &sym
->declared_at
, module_name
);
13163 /* Check the result characteristics. */
13164 if (!gfc_check_result_characteristics (sym
, iface
, errmsg
, 200))
13166 gfc_error ("%s between the MODULE PROCEDURE declaration "
13167 "in MODULE %qs and the declaration at %L in "
13169 errmsg
, module_name
, &sym
->declared_at
,
13170 submodule_name
? submodule_name
: module_name
);
13175 /* Check the characteristics of the formal arguments. */
13176 if (sym
->formal
&& sym
->formal_ns
)
13178 for (arg
= sym
->formal
; arg
&& arg
->sym
; arg
= arg
->next
)
13181 gfc_traverse_ns (sym
->formal_ns
, compare_fsyms
);
13189 /* Resolve a list of finalizer procedures. That is, after they have hopefully
13190 been defined and we now know their defined arguments, check that they fulfill
13191 the requirements of the standard for procedures used as finalizers. */
13194 gfc_resolve_finalizers (gfc_symbol
* derived
, bool *finalizable
)
13196 gfc_finalizer
* list
;
13197 gfc_finalizer
** prev_link
; /* For removing wrong entries from the list. */
13198 bool result
= true;
13199 bool seen_scalar
= false;
13202 gfc_symbol
*parent
= gfc_get_derived_super_type (derived
);
13205 gfc_resolve_finalizers (parent
, finalizable
);
13207 /* Ensure that derived-type components have a their finalizers resolved. */
13208 bool has_final
= derived
->f2k_derived
&& derived
->f2k_derived
->finalizers
;
13209 for (c
= derived
->components
; c
; c
= c
->next
)
13210 if (c
->ts
.type
== BT_DERIVED
13211 && !c
->attr
.pointer
&& !c
->attr
.proc_pointer
&& !c
->attr
.allocatable
)
13213 bool has_final2
= false;
13214 if (!gfc_resolve_finalizers (c
->ts
.u
.derived
, &has_final2
))
13215 return false; /* Error. */
13216 has_final
= has_final
|| has_final2
;
13218 /* Return early if not finalizable. */
13222 *finalizable
= false;
13226 /* Walk over the list of finalizer-procedures, check them, and if any one
13227 does not fit in with the standard's definition, print an error and remove
13228 it from the list. */
13229 prev_link
= &derived
->f2k_derived
->finalizers
;
13230 for (list
= derived
->f2k_derived
->finalizers
; list
; list
= *prev_link
)
13232 gfc_formal_arglist
*dummy_args
;
13237 /* Skip this finalizer if we already resolved it. */
13238 if (list
->proc_tree
)
13240 if (list
->proc_tree
->n
.sym
->formal
->sym
->as
== NULL
13241 || list
->proc_tree
->n
.sym
->formal
->sym
->as
->rank
== 0)
13242 seen_scalar
= true;
13243 prev_link
= &(list
->next
);
13247 /* Check this exists and is a SUBROUTINE. */
13248 if (!list
->proc_sym
->attr
.subroutine
)
13250 gfc_error ("FINAL procedure %qs at %L is not a SUBROUTINE",
13251 list
->proc_sym
->name
, &list
->where
);
13255 /* We should have exactly one argument. */
13256 dummy_args
= gfc_sym_get_dummy_args (list
->proc_sym
);
13257 if (!dummy_args
|| dummy_args
->next
)
13259 gfc_error ("FINAL procedure at %L must have exactly one argument",
13263 arg
= dummy_args
->sym
;
13265 /* This argument must be of our type. */
13266 if (arg
->ts
.type
!= BT_DERIVED
|| arg
->ts
.u
.derived
!= derived
)
13268 gfc_error ("Argument of FINAL procedure at %L must be of type %qs",
13269 &arg
->declared_at
, derived
->name
);
13273 /* It must neither be a pointer nor allocatable nor optional. */
13274 if (arg
->attr
.pointer
)
13276 gfc_error ("Argument of FINAL procedure at %L must not be a POINTER",
13277 &arg
->declared_at
);
13280 if (arg
->attr
.allocatable
)
13282 gfc_error ("Argument of FINAL procedure at %L must not be"
13283 " ALLOCATABLE", &arg
->declared_at
);
13286 if (arg
->attr
.optional
)
13288 gfc_error ("Argument of FINAL procedure at %L must not be OPTIONAL",
13289 &arg
->declared_at
);
13293 /* It must not be INTENT(OUT). */
13294 if (arg
->attr
.intent
== INTENT_OUT
)
13296 gfc_error ("Argument of FINAL procedure at %L must not be"
13297 " INTENT(OUT)", &arg
->declared_at
);
13301 /* Warn if the procedure is non-scalar and not assumed shape. */
13302 if (warn_surprising
&& arg
->as
&& arg
->as
->rank
!= 0
13303 && arg
->as
->type
!= AS_ASSUMED_SHAPE
)
13304 gfc_warning (OPT_Wsurprising
,
13305 "Non-scalar FINAL procedure at %L should have assumed"
13306 " shape argument", &arg
->declared_at
);
13308 /* Check that it does not match in kind and rank with a FINAL procedure
13309 defined earlier. To really loop over the *earlier* declarations,
13310 we need to walk the tail of the list as new ones were pushed at the
13312 /* TODO: Handle kind parameters once they are implemented. */
13313 my_rank
= (arg
->as
? arg
->as
->rank
: 0);
13314 for (i
= list
->next
; i
; i
= i
->next
)
13316 gfc_formal_arglist
*dummy_args
;
13318 /* Argument list might be empty; that is an error signalled earlier,
13319 but we nevertheless continued resolving. */
13320 dummy_args
= gfc_sym_get_dummy_args (i
->proc_sym
);
13323 gfc_symbol
* i_arg
= dummy_args
->sym
;
13324 const int i_rank
= (i_arg
->as
? i_arg
->as
->rank
: 0);
13325 if (i_rank
== my_rank
)
13327 gfc_error ("FINAL procedure %qs declared at %L has the same"
13328 " rank (%d) as %qs",
13329 list
->proc_sym
->name
, &list
->where
, my_rank
,
13330 i
->proc_sym
->name
);
13336 /* Is this the/a scalar finalizer procedure? */
13338 seen_scalar
= true;
13340 /* Find the symtree for this procedure. */
13341 gcc_assert (!list
->proc_tree
);
13342 list
->proc_tree
= gfc_find_sym_in_symtree (list
->proc_sym
);
13344 prev_link
= &list
->next
;
13347 /* Remove wrong nodes immediately from the list so we don't risk any
13348 troubles in the future when they might fail later expectations. */
13351 *prev_link
= list
->next
;
13352 gfc_free_finalizer (i
);
13356 if (result
== false)
13359 /* Warn if we haven't seen a scalar finalizer procedure (but we know there
13360 were nodes in the list, must have been for arrays. It is surely a good
13361 idea to have a scalar version there if there's something to finalize. */
13362 if (warn_surprising
&& derived
->f2k_derived
->finalizers
&& !seen_scalar
)
13363 gfc_warning (OPT_Wsurprising
,
13364 "Only array FINAL procedures declared for derived type %qs"
13365 " defined at %L, suggest also scalar one",
13366 derived
->name
, &derived
->declared_at
);
13368 vtab
= gfc_find_derived_vtab (derived
);
13369 c
= vtab
->ts
.u
.derived
->components
->next
->next
->next
->next
->next
;
13370 gfc_set_sym_referenced (c
->initializer
->symtree
->n
.sym
);
13373 *finalizable
= true;
13379 /* Check if two GENERIC targets are ambiguous and emit an error is they are. */
13382 check_generic_tbp_ambiguity (gfc_tbp_generic
* t1
, gfc_tbp_generic
* t2
,
13383 const char* generic_name
, locus where
)
13385 gfc_symbol
*sym1
, *sym2
;
13386 const char *pass1
, *pass2
;
13387 gfc_formal_arglist
*dummy_args
;
13389 gcc_assert (t1
->specific
&& t2
->specific
);
13390 gcc_assert (!t1
->specific
->is_generic
);
13391 gcc_assert (!t2
->specific
->is_generic
);
13392 gcc_assert (t1
->is_operator
== t2
->is_operator
);
13394 sym1
= t1
->specific
->u
.specific
->n
.sym
;
13395 sym2
= t2
->specific
->u
.specific
->n
.sym
;
13400 /* Both must be SUBROUTINEs or both must be FUNCTIONs. */
13401 if (sym1
->attr
.subroutine
!= sym2
->attr
.subroutine
13402 || sym1
->attr
.function
!= sym2
->attr
.function
)
13404 gfc_error ("%qs and %qs cannot be mixed FUNCTION/SUBROUTINE for"
13405 " GENERIC %qs at %L",
13406 sym1
->name
, sym2
->name
, generic_name
, &where
);
13410 /* Determine PASS arguments. */
13411 if (t1
->specific
->nopass
)
13413 else if (t1
->specific
->pass_arg
)
13414 pass1
= t1
->specific
->pass_arg
;
13417 dummy_args
= gfc_sym_get_dummy_args (t1
->specific
->u
.specific
->n
.sym
);
13419 pass1
= dummy_args
->sym
->name
;
13423 if (t2
->specific
->nopass
)
13425 else if (t2
->specific
->pass_arg
)
13426 pass2
= t2
->specific
->pass_arg
;
13429 dummy_args
= gfc_sym_get_dummy_args (t2
->specific
->u
.specific
->n
.sym
);
13431 pass2
= dummy_args
->sym
->name
;
13436 /* Compare the interfaces. */
13437 if (gfc_compare_interfaces (sym1
, sym2
, sym2
->name
, !t1
->is_operator
, 0,
13438 NULL
, 0, pass1
, pass2
))
13440 gfc_error ("%qs and %qs for GENERIC %qs at %L are ambiguous",
13441 sym1
->name
, sym2
->name
, generic_name
, &where
);
13449 /* Worker function for resolving a generic procedure binding; this is used to
13450 resolve GENERIC as well as user and intrinsic OPERATOR typebound procedures.
13452 The difference between those cases is finding possible inherited bindings
13453 that are overridden, as one has to look for them in tb_sym_root,
13454 tb_uop_root or tb_op, respectively. Thus the caller must already find
13455 the super-type and set p->overridden correctly. */
13458 resolve_tb_generic_targets (gfc_symbol
* super_type
,
13459 gfc_typebound_proc
* p
, const char* name
)
13461 gfc_tbp_generic
* target
;
13462 gfc_symtree
* first_target
;
13463 gfc_symtree
* inherited
;
13465 gcc_assert (p
&& p
->is_generic
);
13467 /* Try to find the specific bindings for the symtrees in our target-list. */
13468 gcc_assert (p
->u
.generic
);
13469 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13470 if (!target
->specific
)
13472 gfc_typebound_proc
* overridden_tbp
;
13473 gfc_tbp_generic
* g
;
13474 const char* target_name
;
13476 target_name
= target
->specific_st
->name
;
13478 /* Defined for this type directly. */
13479 if (target
->specific_st
->n
.tb
&& !target
->specific_st
->n
.tb
->error
)
13481 target
->specific
= target
->specific_st
->n
.tb
;
13482 goto specific_found
;
13485 /* Look for an inherited specific binding. */
13488 inherited
= gfc_find_typebound_proc (super_type
, NULL
, target_name
,
13493 gcc_assert (inherited
->n
.tb
);
13494 target
->specific
= inherited
->n
.tb
;
13495 goto specific_found
;
13499 gfc_error ("Undefined specific binding %qs as target of GENERIC %qs"
13500 " at %L", target_name
, name
, &p
->where
);
13503 /* Once we've found the specific binding, check it is not ambiguous with
13504 other specifics already found or inherited for the same GENERIC. */
13506 gcc_assert (target
->specific
);
13508 /* This must really be a specific binding! */
13509 if (target
->specific
->is_generic
)
13511 gfc_error ("GENERIC %qs at %L must target a specific binding,"
13512 " %qs is GENERIC, too", name
, &p
->where
, target_name
);
13516 /* Check those already resolved on this type directly. */
13517 for (g
= p
->u
.generic
; g
; g
= g
->next
)
13518 if (g
!= target
&& g
->specific
13519 && !check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13522 /* Check for ambiguity with inherited specific targets. */
13523 for (overridden_tbp
= p
->overridden
; overridden_tbp
;
13524 overridden_tbp
= overridden_tbp
->overridden
)
13525 if (overridden_tbp
->is_generic
)
13527 for (g
= overridden_tbp
->u
.generic
; g
; g
= g
->next
)
13529 gcc_assert (g
->specific
);
13530 if (!check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13536 /* If we attempt to "overwrite" a specific binding, this is an error. */
13537 if (p
->overridden
&& !p
->overridden
->is_generic
)
13539 gfc_error ("GENERIC %qs at %L cannot overwrite specific binding with"
13540 " the same name", name
, &p
->where
);
13544 /* Take the SUBROUTINE/FUNCTION attributes of the first specific target, as
13545 all must have the same attributes here. */
13546 first_target
= p
->u
.generic
->specific
->u
.specific
;
13547 gcc_assert (first_target
);
13548 p
->subroutine
= first_target
->n
.sym
->attr
.subroutine
;
13549 p
->function
= first_target
->n
.sym
->attr
.function
;
13555 /* Resolve a GENERIC procedure binding for a derived type. */
13558 resolve_typebound_generic (gfc_symbol
* derived
, gfc_symtree
* st
)
13560 gfc_symbol
* super_type
;
13562 /* Find the overridden binding if any. */
13563 st
->n
.tb
->overridden
= NULL
;
13564 super_type
= gfc_get_derived_super_type (derived
);
13567 gfc_symtree
* overridden
;
13568 overridden
= gfc_find_typebound_proc (super_type
, NULL
, st
->name
,
13571 if (overridden
&& overridden
->n
.tb
)
13572 st
->n
.tb
->overridden
= overridden
->n
.tb
;
13575 /* Resolve using worker function. */
13576 return resolve_tb_generic_targets (super_type
, st
->n
.tb
, st
->name
);
13580 /* Retrieve the target-procedure of an operator binding and do some checks in
13581 common for intrinsic and user-defined type-bound operators. */
13584 get_checked_tb_operator_target (gfc_tbp_generic
* target
, locus where
)
13586 gfc_symbol
* target_proc
;
13588 gcc_assert (target
->specific
&& !target
->specific
->is_generic
);
13589 target_proc
= target
->specific
->u
.specific
->n
.sym
;
13590 gcc_assert (target_proc
);
13592 /* F08:C468. All operator bindings must have a passed-object dummy argument. */
13593 if (target
->specific
->nopass
)
13595 gfc_error ("Type-bound operator at %L cannot be NOPASS", &where
);
13599 return target_proc
;
13603 /* Resolve a type-bound intrinsic operator. */
13606 resolve_typebound_intrinsic_op (gfc_symbol
* derived
, gfc_intrinsic_op op
,
13607 gfc_typebound_proc
* p
)
13609 gfc_symbol
* super_type
;
13610 gfc_tbp_generic
* target
;
13612 /* If there's already an error here, do nothing (but don't fail again). */
13616 /* Operators should always be GENERIC bindings. */
13617 gcc_assert (p
->is_generic
);
13619 /* Look for an overridden binding. */
13620 super_type
= gfc_get_derived_super_type (derived
);
13621 if (super_type
&& super_type
->f2k_derived
)
13622 p
->overridden
= gfc_find_typebound_intrinsic_op (super_type
, NULL
,
13625 p
->overridden
= NULL
;
13627 /* Resolve general GENERIC properties using worker function. */
13628 if (!resolve_tb_generic_targets (super_type
, p
, gfc_op2string(op
)))
13631 /* Check the targets to be procedures of correct interface. */
13632 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13634 gfc_symbol
* target_proc
;
13636 target_proc
= get_checked_tb_operator_target (target
, p
->where
);
13640 if (!gfc_check_operator_interface (target_proc
, op
, p
->where
))
13643 /* Add target to non-typebound operator list. */
13644 if (!target
->specific
->deferred
&& !derived
->attr
.use_assoc
13645 && p
->access
!= ACCESS_PRIVATE
&& derived
->ns
== gfc_current_ns
)
13647 gfc_interface
*head
, *intr
;
13649 /* Preempt 'gfc_check_new_interface' for submodules, where the
13650 mechanism for handling module procedures winds up resolving
13651 operator interfaces twice and would otherwise cause an error. */
13652 for (intr
= derived
->ns
->op
[op
]; intr
; intr
= intr
->next
)
13653 if (intr
->sym
== target_proc
13654 && target_proc
->attr
.used_in_submodule
)
13657 if (!gfc_check_new_interface (derived
->ns
->op
[op
],
13658 target_proc
, p
->where
))
13660 head
= derived
->ns
->op
[op
];
13661 intr
= gfc_get_interface ();
13662 intr
->sym
= target_proc
;
13663 intr
->where
= p
->where
;
13665 derived
->ns
->op
[op
] = intr
;
13677 /* Resolve a type-bound user operator (tree-walker callback). */
13679 static gfc_symbol
* resolve_bindings_derived
;
13680 static bool resolve_bindings_result
;
13682 static bool check_uop_procedure (gfc_symbol
* sym
, locus where
);
13685 resolve_typebound_user_op (gfc_symtree
* stree
)
13687 gfc_symbol
* super_type
;
13688 gfc_tbp_generic
* target
;
13690 gcc_assert (stree
&& stree
->n
.tb
);
13692 if (stree
->n
.tb
->error
)
13695 /* Operators should always be GENERIC bindings. */
13696 gcc_assert (stree
->n
.tb
->is_generic
);
13698 /* Find overridden procedure, if any. */
13699 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13700 if (super_type
&& super_type
->f2k_derived
)
13702 gfc_symtree
* overridden
;
13703 overridden
= gfc_find_typebound_user_op (super_type
, NULL
,
13704 stree
->name
, true, NULL
);
13706 if (overridden
&& overridden
->n
.tb
)
13707 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13710 stree
->n
.tb
->overridden
= NULL
;
13712 /* Resolve basically using worker function. */
13713 if (!resolve_tb_generic_targets (super_type
, stree
->n
.tb
, stree
->name
))
13716 /* Check the targets to be functions of correct interface. */
13717 for (target
= stree
->n
.tb
->u
.generic
; target
; target
= target
->next
)
13719 gfc_symbol
* target_proc
;
13721 target_proc
= get_checked_tb_operator_target (target
, stree
->n
.tb
->where
);
13725 if (!check_uop_procedure (target_proc
, stree
->n
.tb
->where
))
13732 resolve_bindings_result
= false;
13733 stree
->n
.tb
->error
= 1;
13737 /* Resolve the type-bound procedures for a derived type. */
13740 resolve_typebound_procedure (gfc_symtree
* stree
)
13744 gfc_symbol
* me_arg
;
13745 gfc_symbol
* super_type
;
13746 gfc_component
* comp
;
13748 gcc_assert (stree
);
13750 /* Undefined specific symbol from GENERIC target definition. */
13754 if (stree
->n
.tb
->error
)
13757 /* If this is a GENERIC binding, use that routine. */
13758 if (stree
->n
.tb
->is_generic
)
13760 if (!resolve_typebound_generic (resolve_bindings_derived
, stree
))
13765 /* Get the target-procedure to check it. */
13766 gcc_assert (!stree
->n
.tb
->is_generic
);
13767 gcc_assert (stree
->n
.tb
->u
.specific
);
13768 proc
= stree
->n
.tb
->u
.specific
->n
.sym
;
13769 where
= stree
->n
.tb
->where
;
13771 /* Default access should already be resolved from the parser. */
13772 gcc_assert (stree
->n
.tb
->access
!= ACCESS_UNKNOWN
);
13774 if (stree
->n
.tb
->deferred
)
13776 if (!check_proc_interface (proc
, &where
))
13781 /* If proc has not been resolved at this point, proc->name may
13782 actually be a USE associated entity. See PR fortran/89647. */
13783 if (!proc
->resolved
13784 && proc
->attr
.function
== 0 && proc
->attr
.subroutine
== 0)
13787 gfc_find_symbol (proc
->name
, gfc_current_ns
->parent
, 1, &tmp
);
13788 if (tmp
&& tmp
->attr
.use_assoc
)
13790 proc
->module
= tmp
->module
;
13791 proc
->attr
.proc
= tmp
->attr
.proc
;
13792 proc
->attr
.function
= tmp
->attr
.function
;
13793 proc
->attr
.subroutine
= tmp
->attr
.subroutine
;
13794 proc
->attr
.use_assoc
= tmp
->attr
.use_assoc
;
13795 proc
->ts
= tmp
->ts
;
13796 proc
->result
= tmp
->result
;
13800 /* Check for F08:C465. */
13801 if ((!proc
->attr
.subroutine
&& !proc
->attr
.function
)
13802 || (proc
->attr
.proc
!= PROC_MODULE
13803 && proc
->attr
.if_source
!= IFSRC_IFBODY
)
13804 || proc
->attr
.abstract
)
13806 gfc_error ("%qs must be a module procedure or an external "
13807 "procedure with an explicit interface at %L",
13808 proc
->name
, &where
);
13813 stree
->n
.tb
->subroutine
= proc
->attr
.subroutine
;
13814 stree
->n
.tb
->function
= proc
->attr
.function
;
13816 /* Find the super-type of the current derived type. We could do this once and
13817 store in a global if speed is needed, but as long as not I believe this is
13818 more readable and clearer. */
13819 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13821 /* If PASS, resolve and check arguments if not already resolved / loaded
13822 from a .mod file. */
13823 if (!stree
->n
.tb
->nopass
&& stree
->n
.tb
->pass_arg_num
== 0)
13825 gfc_formal_arglist
*dummy_args
;
13827 dummy_args
= gfc_sym_get_dummy_args (proc
);
13828 if (stree
->n
.tb
->pass_arg
)
13830 gfc_formal_arglist
*i
;
13832 /* If an explicit passing argument name is given, walk the arg-list
13833 and look for it. */
13836 stree
->n
.tb
->pass_arg_num
= 1;
13837 for (i
= dummy_args
; i
; i
= i
->next
)
13839 if (!strcmp (i
->sym
->name
, stree
->n
.tb
->pass_arg
))
13844 ++stree
->n
.tb
->pass_arg_num
;
13849 gfc_error ("Procedure %qs with PASS(%s) at %L has no"
13851 proc
->name
, stree
->n
.tb
->pass_arg
, &where
,
13852 stree
->n
.tb
->pass_arg
);
13858 /* Otherwise, take the first one; there should in fact be at least
13860 stree
->n
.tb
->pass_arg_num
= 1;
13863 gfc_error ("Procedure %qs with PASS at %L must have at"
13864 " least one argument", proc
->name
, &where
);
13867 me_arg
= dummy_args
->sym
;
13870 /* Now check that the argument-type matches and the passed-object
13871 dummy argument is generally fine. */
13873 gcc_assert (me_arg
);
13875 if (me_arg
->ts
.type
!= BT_CLASS
)
13877 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13878 " at %L", proc
->name
, &where
);
13882 if (CLASS_DATA (me_arg
)->ts
.u
.derived
13883 != resolve_bindings_derived
)
13885 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13886 " the derived-type %qs", me_arg
->name
, proc
->name
,
13887 me_arg
->name
, &where
, resolve_bindings_derived
->name
);
13891 gcc_assert (me_arg
->ts
.type
== BT_CLASS
);
13892 if (CLASS_DATA (me_arg
)->as
&& CLASS_DATA (me_arg
)->as
->rank
!= 0)
13894 gfc_error ("Passed-object dummy argument of %qs at %L must be"
13895 " scalar", proc
->name
, &where
);
13898 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13900 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13901 " be ALLOCATABLE", proc
->name
, &where
);
13904 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13906 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13907 " be POINTER", proc
->name
, &where
);
13912 /* If we are extending some type, check that we don't override a procedure
13913 flagged NON_OVERRIDABLE. */
13914 stree
->n
.tb
->overridden
= NULL
;
13917 gfc_symtree
* overridden
;
13918 overridden
= gfc_find_typebound_proc (super_type
, NULL
,
13919 stree
->name
, true, NULL
);
13923 if (overridden
->n
.tb
)
13924 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13926 if (!gfc_check_typebound_override (stree
, overridden
))
13931 /* See if there's a name collision with a component directly in this type. */
13932 for (comp
= resolve_bindings_derived
->components
; comp
; comp
= comp
->next
)
13933 if (!strcmp (comp
->name
, stree
->name
))
13935 gfc_error ("Procedure %qs at %L has the same name as a component of"
13937 stree
->name
, &where
, resolve_bindings_derived
->name
);
13941 /* Try to find a name collision with an inherited component. */
13942 if (super_type
&& gfc_find_component (super_type
, stree
->name
, true, true,
13945 gfc_error ("Procedure %qs at %L has the same name as an inherited"
13946 " component of %qs",
13947 stree
->name
, &where
, resolve_bindings_derived
->name
);
13951 stree
->n
.tb
->error
= 0;
13955 resolve_bindings_result
= false;
13956 stree
->n
.tb
->error
= 1;
13961 resolve_typebound_procedures (gfc_symbol
* derived
)
13964 gfc_symbol
* super_type
;
13966 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->tb_sym_root
)
13969 super_type
= gfc_get_derived_super_type (derived
);
13971 resolve_symbol (super_type
);
13973 resolve_bindings_derived
= derived
;
13974 resolve_bindings_result
= true;
13976 if (derived
->f2k_derived
->tb_sym_root
)
13977 gfc_traverse_symtree (derived
->f2k_derived
->tb_sym_root
,
13978 &resolve_typebound_procedure
);
13980 if (derived
->f2k_derived
->tb_uop_root
)
13981 gfc_traverse_symtree (derived
->f2k_derived
->tb_uop_root
,
13982 &resolve_typebound_user_op
);
13984 for (op
= 0; op
!= GFC_INTRINSIC_OPS
; ++op
)
13986 gfc_typebound_proc
* p
= derived
->f2k_derived
->tb_op
[op
];
13987 if (p
&& !resolve_typebound_intrinsic_op (derived
,
13988 (gfc_intrinsic_op
)op
, p
))
13989 resolve_bindings_result
= false;
13992 return resolve_bindings_result
;
13996 /* Add a derived type to the dt_list. The dt_list is used in trans-types.c
13997 to give all identical derived types the same backend_decl. */
13999 add_dt_to_dt_list (gfc_symbol
*derived
)
14001 if (!derived
->dt_next
)
14003 if (gfc_derived_types
)
14005 derived
->dt_next
= gfc_derived_types
->dt_next
;
14006 gfc_derived_types
->dt_next
= derived
;
14010 derived
->dt_next
= derived
;
14012 gfc_derived_types
= derived
;
14017 /* Ensure that a derived-type is really not abstract, meaning that every
14018 inherited DEFERRED binding is overridden by a non-DEFERRED one. */
14021 ensure_not_abstract_walker (gfc_symbol
* sub
, gfc_symtree
* st
)
14026 if (!ensure_not_abstract_walker (sub
, st
->left
))
14028 if (!ensure_not_abstract_walker (sub
, st
->right
))
14031 if (st
->n
.tb
&& st
->n
.tb
->deferred
)
14033 gfc_symtree
* overriding
;
14034 overriding
= gfc_find_typebound_proc (sub
, NULL
, st
->name
, true, NULL
);
14037 gcc_assert (overriding
->n
.tb
);
14038 if (overriding
->n
.tb
->deferred
)
14040 gfc_error ("Derived-type %qs declared at %L must be ABSTRACT because"
14041 " %qs is DEFERRED and not overridden",
14042 sub
->name
, &sub
->declared_at
, st
->name
);
14051 ensure_not_abstract (gfc_symbol
* sub
, gfc_symbol
* ancestor
)
14053 /* The algorithm used here is to recursively travel up the ancestry of sub
14054 and for each ancestor-type, check all bindings. If any of them is
14055 DEFERRED, look it up starting from sub and see if the found (overriding)
14056 binding is not DEFERRED.
14057 This is not the most efficient way to do this, but it should be ok and is
14058 clearer than something sophisticated. */
14060 gcc_assert (ancestor
&& !sub
->attr
.abstract
);
14062 if (!ancestor
->attr
.abstract
)
14065 /* Walk bindings of this ancestor. */
14066 if (ancestor
->f2k_derived
)
14069 t
= ensure_not_abstract_walker (sub
, ancestor
->f2k_derived
->tb_sym_root
);
14074 /* Find next ancestor type and recurse on it. */
14075 ancestor
= gfc_get_derived_super_type (ancestor
);
14077 return ensure_not_abstract (sub
, ancestor
);
14083 /* This check for typebound defined assignments is done recursively
14084 since the order in which derived types are resolved is not always in
14085 order of the declarations. */
14088 check_defined_assignments (gfc_symbol
*derived
)
14092 for (c
= derived
->components
; c
; c
= c
->next
)
14094 if (!gfc_bt_struct (c
->ts
.type
)
14096 || c
->attr
.allocatable
14097 || c
->attr
.proc_pointer_comp
14098 || c
->attr
.class_pointer
14099 || c
->attr
.proc_pointer
)
14102 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
14103 || (c
->ts
.u
.derived
->f2k_derived
14104 && c
->ts
.u
.derived
->f2k_derived
->tb_op
[INTRINSIC_ASSIGN
]))
14106 derived
->attr
.defined_assign_comp
= 1;
14110 check_defined_assignments (c
->ts
.u
.derived
);
14111 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
14113 derived
->attr
.defined_assign_comp
= 1;
14120 /* Resolve a single component of a derived type or structure. */
14123 resolve_component (gfc_component
*c
, gfc_symbol
*sym
)
14125 gfc_symbol
*super_type
;
14126 symbol_attribute
*attr
;
14128 if (c
->attr
.artificial
)
14131 /* Do not allow vtype components to be resolved in nameless namespaces
14132 such as block data because the procedure pointers will cause ICEs
14133 and vtables are not needed in these contexts. */
14134 if (sym
->attr
.vtype
&& sym
->attr
.use_assoc
14135 && sym
->ns
->proc_name
== NULL
)
14139 if ((!sym
->attr
.is_class
|| c
!= sym
->components
)
14140 && c
->attr
.codimension
14141 && (!c
->attr
.allocatable
|| (c
->as
&& c
->as
->type
!= AS_DEFERRED
)))
14143 gfc_error ("Coarray component %qs at %L must be allocatable with "
14144 "deferred shape", c
->name
, &c
->loc
);
14149 if (c
->attr
.codimension
&& c
->ts
.type
== BT_DERIVED
14150 && c
->ts
.u
.derived
->ts
.is_iso_c
)
14152 gfc_error ("Component %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
14153 "shall not be a coarray", c
->name
, &c
->loc
);
14158 if (gfc_bt_struct (c
->ts
.type
) && c
->ts
.u
.derived
->attr
.coarray_comp
14159 && (c
->attr
.codimension
|| c
->attr
.pointer
|| c
->attr
.dimension
14160 || c
->attr
.allocatable
))
14162 gfc_error ("Component %qs at %L with coarray component "
14163 "shall be a nonpointer, nonallocatable scalar",
14169 if (c
->ts
.type
== BT_CLASS
)
14171 if (CLASS_DATA (c
))
14173 attr
= &(CLASS_DATA (c
)->attr
);
14175 /* Fix up contiguous attribute. */
14176 if (c
->attr
.contiguous
)
14177 attr
->contiguous
= 1;
14185 if (attr
&& attr
->contiguous
&& (!attr
->dimension
|| !attr
->pointer
))
14187 gfc_error ("Component %qs at %L has the CONTIGUOUS attribute but "
14188 "is not an array pointer", c
->name
, &c
->loc
);
14192 /* F2003, 15.2.1 - length has to be one. */
14193 if (sym
->attr
.is_bind_c
&& c
->ts
.type
== BT_CHARACTER
14194 && (c
->ts
.u
.cl
== NULL
|| c
->ts
.u
.cl
->length
== NULL
14195 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
)
14196 || mpz_cmp_si (c
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
14198 gfc_error ("Component %qs of BIND(C) type at %L must have length one",
14203 if (c
->attr
.proc_pointer
&& c
->ts
.interface
)
14205 gfc_symbol
*ifc
= c
->ts
.interface
;
14207 if (!sym
->attr
.vtype
&& !check_proc_interface (ifc
, &c
->loc
))
14213 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
14215 /* Resolve interface and copy attributes. */
14216 if (ifc
->formal
&& !ifc
->formal_ns
)
14217 resolve_symbol (ifc
);
14218 if (ifc
->attr
.intrinsic
)
14219 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
14223 c
->ts
= ifc
->result
->ts
;
14224 c
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
14225 c
->attr
.pointer
= ifc
->result
->attr
.pointer
;
14226 c
->attr
.dimension
= ifc
->result
->attr
.dimension
;
14227 c
->as
= gfc_copy_array_spec (ifc
->result
->as
);
14228 c
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
14233 c
->attr
.allocatable
= ifc
->attr
.allocatable
;
14234 c
->attr
.pointer
= ifc
->attr
.pointer
;
14235 c
->attr
.dimension
= ifc
->attr
.dimension
;
14236 c
->as
= gfc_copy_array_spec (ifc
->as
);
14237 c
->attr
.class_ok
= ifc
->attr
.class_ok
;
14239 c
->ts
.interface
= ifc
;
14240 c
->attr
.function
= ifc
->attr
.function
;
14241 c
->attr
.subroutine
= ifc
->attr
.subroutine
;
14243 c
->attr
.pure
= ifc
->attr
.pure
;
14244 c
->attr
.elemental
= ifc
->attr
.elemental
;
14245 c
->attr
.recursive
= ifc
->attr
.recursive
;
14246 c
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
14247 c
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
14248 /* Copy char length. */
14249 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
14251 gfc_charlen
*cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
14252 if (cl
->length
&& !cl
->resolved
14253 && !gfc_resolve_expr (cl
->length
))
14262 else if (c
->attr
.proc_pointer
&& c
->ts
.type
== BT_UNKNOWN
)
14264 /* Since PPCs are not implicitly typed, a PPC without an explicit
14265 interface must be a subroutine. */
14266 gfc_add_subroutine (&c
->attr
, c
->name
, &c
->loc
);
14269 /* Procedure pointer components: Check PASS arg. */
14270 if (c
->attr
.proc_pointer
&& !c
->tb
->nopass
&& c
->tb
->pass_arg_num
== 0
14271 && !sym
->attr
.vtype
)
14273 gfc_symbol
* me_arg
;
14275 if (c
->tb
->pass_arg
)
14277 gfc_formal_arglist
* i
;
14279 /* If an explicit passing argument name is given, walk the arg-list
14280 and look for it. */
14283 c
->tb
->pass_arg_num
= 1;
14284 for (i
= c
->ts
.interface
->formal
; i
; i
= i
->next
)
14286 if (!strcmp (i
->sym
->name
, c
->tb
->pass_arg
))
14291 c
->tb
->pass_arg_num
++;
14296 gfc_error ("Procedure pointer component %qs with PASS(%s) "
14297 "at %L has no argument %qs", c
->name
,
14298 c
->tb
->pass_arg
, &c
->loc
, c
->tb
->pass_arg
);
14305 /* Otherwise, take the first one; there should in fact be at least
14307 c
->tb
->pass_arg_num
= 1;
14308 if (!c
->ts
.interface
->formal
)
14310 gfc_error ("Procedure pointer component %qs with PASS at %L "
14311 "must have at least one argument",
14316 me_arg
= c
->ts
.interface
->formal
->sym
;
14319 /* Now check that the argument-type matches. */
14320 gcc_assert (me_arg
);
14321 if ((me_arg
->ts
.type
!= BT_DERIVED
&& me_arg
->ts
.type
!= BT_CLASS
)
14322 || (me_arg
->ts
.type
== BT_DERIVED
&& me_arg
->ts
.u
.derived
!= sym
)
14323 || (me_arg
->ts
.type
== BT_CLASS
14324 && CLASS_DATA (me_arg
)->ts
.u
.derived
!= sym
))
14326 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
14327 " the derived type %qs", me_arg
->name
, c
->name
,
14328 me_arg
->name
, &c
->loc
, sym
->name
);
14333 /* Check for F03:C453. */
14334 if (CLASS_DATA (me_arg
)->attr
.dimension
)
14336 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14337 "must be scalar", me_arg
->name
, c
->name
, me_arg
->name
,
14343 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
14345 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14346 "may not have the POINTER attribute", me_arg
->name
,
14347 c
->name
, me_arg
->name
, &c
->loc
);
14352 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
14354 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14355 "may not be ALLOCATABLE", me_arg
->name
, c
->name
,
14356 me_arg
->name
, &c
->loc
);
14361 if (gfc_type_is_extensible (sym
) && me_arg
->ts
.type
!= BT_CLASS
)
14363 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
14364 " at %L", c
->name
, &c
->loc
);
14370 /* Check type-spec if this is not the parent-type component. */
14371 if (((sym
->attr
.is_class
14372 && (!sym
->components
->ts
.u
.derived
->attr
.extension
14373 || c
!= sym
->components
->ts
.u
.derived
->components
))
14374 || (!sym
->attr
.is_class
14375 && (!sym
->attr
.extension
|| c
!= sym
->components
)))
14376 && !sym
->attr
.vtype
14377 && !resolve_typespec_used (&c
->ts
, &c
->loc
, c
->name
))
14380 super_type
= gfc_get_derived_super_type (sym
);
14382 /* If this type is an extension, set the accessibility of the parent
14385 && ((sym
->attr
.is_class
14386 && c
== sym
->components
->ts
.u
.derived
->components
)
14387 || (!sym
->attr
.is_class
&& c
== sym
->components
))
14388 && strcmp (super_type
->name
, c
->name
) == 0)
14389 c
->attr
.access
= super_type
->attr
.access
;
14391 /* If this type is an extension, see if this component has the same name
14392 as an inherited type-bound procedure. */
14393 if (super_type
&& !sym
->attr
.is_class
14394 && gfc_find_typebound_proc (super_type
, NULL
, c
->name
, true, NULL
))
14396 gfc_error ("Component %qs of %qs at %L has the same name as an"
14397 " inherited type-bound procedure",
14398 c
->name
, sym
->name
, &c
->loc
);
14402 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.proc_pointer
14403 && !c
->ts
.deferred
)
14405 if (c
->ts
.u
.cl
->length
== NULL
14406 || (!resolve_charlen(c
->ts
.u
.cl
))
14407 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
))
14409 gfc_error ("Character length of component %qs needs to "
14410 "be a constant specification expression at %L",
14412 c
->ts
.u
.cl
->length
? &c
->ts
.u
.cl
->length
->where
: &c
->loc
);
14417 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.deferred
14418 && !c
->attr
.pointer
&& !c
->attr
.allocatable
)
14420 gfc_error ("Character component %qs of %qs at %L with deferred "
14421 "length must be a POINTER or ALLOCATABLE",
14422 c
->name
, sym
->name
, &c
->loc
);
14426 /* Add the hidden deferred length field. */
14427 if (c
->ts
.type
== BT_CHARACTER
14428 && (c
->ts
.deferred
|| c
->attr
.pdt_string
)
14429 && !c
->attr
.function
14430 && !sym
->attr
.is_class
)
14432 char name
[GFC_MAX_SYMBOL_LEN
+9];
14433 gfc_component
*strlen
;
14434 sprintf (name
, "_%s_length", c
->name
);
14435 strlen
= gfc_find_component (sym
, name
, true, true, NULL
);
14436 if (strlen
== NULL
)
14438 if (!gfc_add_component (sym
, name
, &strlen
))
14440 strlen
->ts
.type
= BT_INTEGER
;
14441 strlen
->ts
.kind
= gfc_charlen_int_kind
;
14442 strlen
->attr
.access
= ACCESS_PRIVATE
;
14443 strlen
->attr
.artificial
= 1;
14447 if (c
->ts
.type
== BT_DERIVED
14448 && sym
->component_access
!= ACCESS_PRIVATE
14449 && gfc_check_symbol_access (sym
)
14450 && !is_sym_host_assoc (c
->ts
.u
.derived
, sym
->ns
)
14451 && !c
->ts
.u
.derived
->attr
.use_assoc
14452 && !gfc_check_symbol_access (c
->ts
.u
.derived
)
14453 && !gfc_notify_std (GFC_STD_F2003
, "the component %qs is a "
14454 "PRIVATE type and cannot be a component of "
14455 "%qs, which is PUBLIC at %L", c
->name
,
14456 sym
->name
, &sym
->declared_at
))
14459 if ((sym
->attr
.sequence
|| sym
->attr
.is_bind_c
) && c
->ts
.type
== BT_CLASS
)
14461 gfc_error ("Polymorphic component %s at %L in SEQUENCE or BIND(C) "
14462 "type %s", c
->name
, &c
->loc
, sym
->name
);
14466 if (sym
->attr
.sequence
)
14468 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.sequence
== 0)
14470 gfc_error ("Component %s of SEQUENCE type declared at %L does "
14471 "not have the SEQUENCE attribute",
14472 c
->ts
.u
.derived
->name
, &sym
->declared_at
);
14477 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.generic
)
14478 c
->ts
.u
.derived
= gfc_find_dt_in_generic (c
->ts
.u
.derived
);
14479 else if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
14480 && CLASS_DATA (c
)->ts
.u
.derived
->attr
.generic
)
14481 CLASS_DATA (c
)->ts
.u
.derived
14482 = gfc_find_dt_in_generic (CLASS_DATA (c
)->ts
.u
.derived
);
14484 /* If an allocatable component derived type is of the same type as
14485 the enclosing derived type, we need a vtable generating so that
14486 the __deallocate procedure is created. */
14487 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
14488 && c
->ts
.u
.derived
== sym
&& c
->attr
.allocatable
== 1)
14489 gfc_find_vtab (&c
->ts
);
14491 /* Ensure that all the derived type components are put on the
14492 derived type list; even in formal namespaces, where derived type
14493 pointer components might not have been declared. */
14494 if (c
->ts
.type
== BT_DERIVED
14496 && c
->ts
.u
.derived
->components
14498 && sym
!= c
->ts
.u
.derived
)
14499 add_dt_to_dt_list (c
->ts
.u
.derived
);
14501 if (!gfc_resolve_array_spec (c
->as
,
14502 !(c
->attr
.pointer
|| c
->attr
.proc_pointer
14503 || c
->attr
.allocatable
)))
14506 if (c
->initializer
&& !sym
->attr
.vtype
14507 && !c
->attr
.pdt_kind
&& !c
->attr
.pdt_len
14508 && !gfc_check_assign_symbol (sym
, c
, c
->initializer
))
14515 /* Be nice about the locus for a structure expression - show the locus of the
14516 first non-null sub-expression if we can. */
14519 cons_where (gfc_expr
*struct_expr
)
14521 gfc_constructor
*cons
;
14523 gcc_assert (struct_expr
&& struct_expr
->expr_type
== EXPR_STRUCTURE
);
14525 cons
= gfc_constructor_first (struct_expr
->value
.constructor
);
14526 for (; cons
; cons
= gfc_constructor_next (cons
))
14528 if (cons
->expr
&& cons
->expr
->expr_type
!= EXPR_NULL
)
14529 return &cons
->expr
->where
;
14532 return &struct_expr
->where
;
14535 /* Resolve the components of a structure type. Much less work than derived
14539 resolve_fl_struct (gfc_symbol
*sym
)
14542 gfc_expr
*init
= NULL
;
14545 /* Make sure UNIONs do not have overlapping initializers. */
14546 if (sym
->attr
.flavor
== FL_UNION
)
14548 for (c
= sym
->components
; c
; c
= c
->next
)
14550 if (init
&& c
->initializer
)
14552 gfc_error ("Conflicting initializers in union at %L and %L",
14553 cons_where (init
), cons_where (c
->initializer
));
14554 gfc_free_expr (c
->initializer
);
14555 c
->initializer
= NULL
;
14558 init
= c
->initializer
;
14563 for (c
= sym
->components
; c
; c
= c
->next
)
14564 if (!resolve_component (c
, sym
))
14570 if (sym
->components
)
14571 add_dt_to_dt_list (sym
);
14577 /* Resolve the components of a derived type. This does not have to wait until
14578 resolution stage, but can be done as soon as the dt declaration has been
14582 resolve_fl_derived0 (gfc_symbol
*sym
)
14584 gfc_symbol
* super_type
;
14586 gfc_formal_arglist
*f
;
14589 if (sym
->attr
.unlimited_polymorphic
)
14592 super_type
= gfc_get_derived_super_type (sym
);
14595 if (super_type
&& sym
->attr
.coarray_comp
&& !super_type
->attr
.coarray_comp
)
14597 gfc_error ("As extending type %qs at %L has a coarray component, "
14598 "parent type %qs shall also have one", sym
->name
,
14599 &sym
->declared_at
, super_type
->name
);
14603 /* Ensure the extended type gets resolved before we do. */
14604 if (super_type
&& !resolve_fl_derived0 (super_type
))
14607 /* An ABSTRACT type must be extensible. */
14608 if (sym
->attr
.abstract
&& !gfc_type_is_extensible (sym
))
14610 gfc_error ("Non-extensible derived-type %qs at %L must not be ABSTRACT",
14611 sym
->name
, &sym
->declared_at
);
14615 c
= (sym
->attr
.is_class
) ? sym
->components
->ts
.u
.derived
->components
14619 for ( ; c
!= NULL
; c
= c
->next
)
14620 if (!resolve_component (c
, sym
))
14626 /* Now add the caf token field, where needed. */
14627 if (flag_coarray
!= GFC_FCOARRAY_NONE
14628 && !sym
->attr
.is_class
&& !sym
->attr
.vtype
)
14630 for (c
= sym
->components
; c
; c
= c
->next
)
14631 if (!c
->attr
.dimension
&& !c
->attr
.codimension
14632 && (c
->attr
.allocatable
|| c
->attr
.pointer
))
14634 char name
[GFC_MAX_SYMBOL_LEN
+9];
14635 gfc_component
*token
;
14636 sprintf (name
, "_caf_%s", c
->name
);
14637 token
= gfc_find_component (sym
, name
, true, true, NULL
);
14640 if (!gfc_add_component (sym
, name
, &token
))
14642 token
->ts
.type
= BT_VOID
;
14643 token
->ts
.kind
= gfc_default_integer_kind
;
14644 token
->attr
.access
= ACCESS_PRIVATE
;
14645 token
->attr
.artificial
= 1;
14646 token
->attr
.caf_token
= 1;
14651 check_defined_assignments (sym
);
14653 if (!sym
->attr
.defined_assign_comp
&& super_type
)
14654 sym
->attr
.defined_assign_comp
14655 = super_type
->attr
.defined_assign_comp
;
14657 /* If this is a non-ABSTRACT type extending an ABSTRACT one, ensure that
14658 all DEFERRED bindings are overridden. */
14659 if (super_type
&& super_type
->attr
.abstract
&& !sym
->attr
.abstract
14660 && !sym
->attr
.is_class
14661 && !ensure_not_abstract (sym
, super_type
))
14664 /* Check that there is a component for every PDT parameter. */
14665 if (sym
->attr
.pdt_template
)
14667 for (f
= sym
->formal
; f
; f
= f
->next
)
14671 c
= gfc_find_component (sym
, f
->sym
->name
, true, true, NULL
);
14674 gfc_error ("Parameterized type %qs does not have a component "
14675 "corresponding to parameter %qs at %L", sym
->name
,
14676 f
->sym
->name
, &sym
->declared_at
);
14682 /* Add derived type to the derived type list. */
14683 add_dt_to_dt_list (sym
);
14689 /* The following procedure does the full resolution of a derived type,
14690 including resolution of all type-bound procedures (if present). In contrast
14691 to 'resolve_fl_derived0' this can only be done after the module has been
14692 parsed completely. */
14695 resolve_fl_derived (gfc_symbol
*sym
)
14697 gfc_symbol
*gen_dt
= NULL
;
14699 if (sym
->attr
.unlimited_polymorphic
)
14702 if (!sym
->attr
.is_class
)
14703 gfc_find_symbol (sym
->name
, sym
->ns
, 0, &gen_dt
);
14704 if (gen_dt
&& gen_dt
->generic
&& gen_dt
->generic
->next
14705 && (!gen_dt
->generic
->sym
->attr
.use_assoc
14706 || gen_dt
->generic
->sym
->module
!= gen_dt
->generic
->next
->sym
->module
)
14707 && !gfc_notify_std (GFC_STD_F2003
, "Generic name %qs of function "
14708 "%qs at %L being the same name as derived "
14709 "type at %L", sym
->name
,
14710 gen_dt
->generic
->sym
== sym
14711 ? gen_dt
->generic
->next
->sym
->name
14712 : gen_dt
->generic
->sym
->name
,
14713 gen_dt
->generic
->sym
== sym
14714 ? &gen_dt
->generic
->next
->sym
->declared_at
14715 : &gen_dt
->generic
->sym
->declared_at
,
14716 &sym
->declared_at
))
14719 if (sym
->components
== NULL
&& !sym
->attr
.zero_comp
&& !sym
->attr
.use_assoc
)
14721 gfc_error ("Derived type %qs at %L has not been declared",
14722 sym
->name
, &sym
->declared_at
);
14726 /* Resolve the finalizer procedures. */
14727 if (!gfc_resolve_finalizers (sym
, NULL
))
14730 if (sym
->attr
.is_class
&& sym
->ts
.u
.derived
== NULL
)
14732 /* Fix up incomplete CLASS symbols. */
14733 gfc_component
*data
= gfc_find_component (sym
, "_data", true, true, NULL
);
14734 gfc_component
*vptr
= gfc_find_component (sym
, "_vptr", true, true, NULL
);
14736 /* Nothing more to do for unlimited polymorphic entities. */
14737 if (data
->ts
.u
.derived
->attr
.unlimited_polymorphic
)
14739 else if (vptr
->ts
.u
.derived
== NULL
)
14741 gfc_symbol
*vtab
= gfc_find_derived_vtab (data
->ts
.u
.derived
);
14743 vptr
->ts
.u
.derived
= vtab
->ts
.u
.derived
;
14744 if (!resolve_fl_derived0 (vptr
->ts
.u
.derived
))
14749 if (!resolve_fl_derived0 (sym
))
14752 /* Resolve the type-bound procedures. */
14753 if (!resolve_typebound_procedures (sym
))
14756 /* Generate module vtables subject to their accessibility and their not
14757 being vtables or pdt templates. If this is not done class declarations
14758 in external procedures wind up with their own version and so SELECT TYPE
14759 fails because the vptrs do not have the same address. */
14760 if (gfc_option
.allow_std
& GFC_STD_F2003
14761 && sym
->ns
->proc_name
14762 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14763 && sym
->attr
.access
!= ACCESS_PRIVATE
14764 && !(sym
->attr
.use_assoc
|| sym
->attr
.vtype
|| sym
->attr
.pdt_template
))
14766 gfc_symbol
*vtab
= gfc_find_derived_vtab (sym
);
14767 gfc_set_sym_referenced (vtab
);
14775 resolve_fl_namelist (gfc_symbol
*sym
)
14780 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14782 /* Check again, the check in match only works if NAMELIST comes
14784 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SIZE
)
14786 gfc_error ("Assumed size array %qs in namelist %qs at %L is not "
14787 "allowed", nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14791 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SHAPE
14792 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14793 "with assumed shape in namelist %qs at %L",
14794 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14797 if (is_non_constant_shape_array (nl
->sym
)
14798 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14799 "with nonconstant shape in namelist %qs at %L",
14800 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14803 if (nl
->sym
->ts
.type
== BT_CHARACTER
14804 && (nl
->sym
->ts
.u
.cl
->length
== NULL
14805 || !gfc_is_constant_expr (nl
->sym
->ts
.u
.cl
->length
))
14806 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs with "
14807 "nonconstant character length in "
14808 "namelist %qs at %L", nl
->sym
->name
,
14809 sym
->name
, &sym
->declared_at
))
14814 /* Reject PRIVATE objects in a PUBLIC namelist. */
14815 if (gfc_check_symbol_access (sym
))
14817 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14819 if (!nl
->sym
->attr
.use_assoc
14820 && !is_sym_host_assoc (nl
->sym
, sym
->ns
)
14821 && !gfc_check_symbol_access (nl
->sym
))
14823 gfc_error ("NAMELIST object %qs was declared PRIVATE and "
14824 "cannot be member of PUBLIC namelist %qs at %L",
14825 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14829 if (nl
->sym
->ts
.type
== BT_DERIVED
14830 && (nl
->sym
->ts
.u
.derived
->attr
.alloc_comp
14831 || nl
->sym
->ts
.u
.derived
->attr
.pointer_comp
))
14833 if (!gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs in "
14834 "namelist %qs at %L with ALLOCATABLE "
14835 "or POINTER components", nl
->sym
->name
,
14836 sym
->name
, &sym
->declared_at
))
14841 /* Types with private components that came here by USE-association. */
14842 if (nl
->sym
->ts
.type
== BT_DERIVED
14843 && derived_inaccessible (nl
->sym
->ts
.u
.derived
))
14845 gfc_error ("NAMELIST object %qs has use-associated PRIVATE "
14846 "components and cannot be member of namelist %qs at %L",
14847 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14851 /* Types with private components that are defined in the same module. */
14852 if (nl
->sym
->ts
.type
== BT_DERIVED
14853 && !is_sym_host_assoc (nl
->sym
->ts
.u
.derived
, sym
->ns
)
14854 && nl
->sym
->ts
.u
.derived
->attr
.private_comp
)
14856 gfc_error ("NAMELIST object %qs has PRIVATE components and "
14857 "cannot be a member of PUBLIC namelist %qs at %L",
14858 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14865 /* 14.1.2 A module or internal procedure represent local entities
14866 of the same type as a namelist member and so are not allowed. */
14867 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14869 if (nl
->sym
->ts
.kind
!= 0 && nl
->sym
->attr
.flavor
== FL_VARIABLE
)
14872 if (nl
->sym
->attr
.function
&& nl
->sym
== nl
->sym
->result
)
14873 if ((nl
->sym
== sym
->ns
->proc_name
)
14875 (sym
->ns
->parent
&& nl
->sym
== sym
->ns
->parent
->proc_name
))
14880 gfc_find_symbol (nl
->sym
->name
, sym
->ns
, 1, &nlsym
);
14881 if (nlsym
&& nlsym
->attr
.flavor
== FL_PROCEDURE
)
14883 gfc_error ("PROCEDURE attribute conflicts with NAMELIST "
14884 "attribute in %qs at %L", nlsym
->name
,
14885 &sym
->declared_at
);
14892 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14893 nl
->sym
->attr
.asynchronous
= 1;
14900 resolve_fl_parameter (gfc_symbol
*sym
)
14902 /* A parameter array's shape needs to be constant. */
14903 if (sym
->as
!= NULL
14904 && (sym
->as
->type
== AS_DEFERRED
14905 || is_non_constant_shape_array (sym
)))
14907 gfc_error ("Parameter array %qs at %L cannot be automatic "
14908 "or of deferred shape", sym
->name
, &sym
->declared_at
);
14912 /* Constraints on deferred type parameter. */
14913 if (!deferred_requirements (sym
))
14916 /* Make sure a parameter that has been implicitly typed still
14917 matches the implicit type, since PARAMETER statements can precede
14918 IMPLICIT statements. */
14919 if (sym
->attr
.implicit_type
14920 && !gfc_compare_types (&sym
->ts
, gfc_get_default_type (sym
->name
,
14923 gfc_error ("Implicitly typed PARAMETER %qs at %L doesn't match a "
14924 "later IMPLICIT type", sym
->name
, &sym
->declared_at
);
14928 /* Make sure the types of derived parameters are consistent. This
14929 type checking is deferred until resolution because the type may
14930 refer to a derived type from the host. */
14931 if (sym
->ts
.type
== BT_DERIVED
14932 && !gfc_compare_types (&sym
->ts
, &sym
->value
->ts
))
14934 gfc_error ("Incompatible derived type in PARAMETER at %L",
14935 &sym
->value
->where
);
14939 /* F03:C509,C514. */
14940 if (sym
->ts
.type
== BT_CLASS
)
14942 gfc_error ("CLASS variable %qs at %L cannot have the PARAMETER attribute",
14943 sym
->name
, &sym
->declared_at
);
14951 /* Called by resolve_symbol to check PDTs. */
14954 resolve_pdt (gfc_symbol
* sym
)
14956 gfc_symbol
*derived
= NULL
;
14957 gfc_actual_arglist
*param
;
14959 bool const_len_exprs
= true;
14960 bool assumed_len_exprs
= false;
14961 symbol_attribute
*attr
;
14963 if (sym
->ts
.type
== BT_DERIVED
)
14965 derived
= sym
->ts
.u
.derived
;
14966 attr
= &(sym
->attr
);
14968 else if (sym
->ts
.type
== BT_CLASS
)
14970 derived
= CLASS_DATA (sym
)->ts
.u
.derived
;
14971 attr
= &(CLASS_DATA (sym
)->attr
);
14974 gcc_unreachable ();
14976 gcc_assert (derived
->attr
.pdt_type
);
14978 for (param
= sym
->param_list
; param
; param
= param
->next
)
14980 c
= gfc_find_component (derived
, param
->name
, false, true, NULL
);
14982 if (c
->attr
.pdt_kind
)
14985 if (param
->expr
&& !gfc_is_constant_expr (param
->expr
)
14986 && c
->attr
.pdt_len
)
14987 const_len_exprs
= false;
14988 else if (param
->spec_type
== SPEC_ASSUMED
)
14989 assumed_len_exprs
= true;
14991 if (param
->spec_type
== SPEC_DEFERRED
14992 && !attr
->allocatable
&& !attr
->pointer
)
14993 gfc_error ("The object %qs at %L has a deferred LEN "
14994 "parameter %qs and is neither allocatable "
14995 "nor a pointer", sym
->name
, &sym
->declared_at
,
15000 if (!const_len_exprs
15001 && (sym
->ns
->proc_name
->attr
.is_main_program
15002 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15003 || sym
->attr
.save
!= SAVE_NONE
))
15004 gfc_error ("The AUTOMATIC object %qs at %L must not have the "
15005 "SAVE attribute or be a variable declared in the "
15006 "main program, a module or a submodule(F08/C513)",
15007 sym
->name
, &sym
->declared_at
);
15009 if (assumed_len_exprs
&& !(sym
->attr
.dummy
15010 || sym
->attr
.select_type_temporary
|| sym
->attr
.associate_var
))
15011 gfc_error ("The object %qs at %L with ASSUMED type parameters "
15012 "must be a dummy or a SELECT TYPE selector(F08/4.2)",
15013 sym
->name
, &sym
->declared_at
);
15017 /* Do anything necessary to resolve a symbol. Right now, we just
15018 assume that an otherwise unknown symbol is a variable. This sort
15019 of thing commonly happens for symbols in module. */
15022 resolve_symbol (gfc_symbol
*sym
)
15024 int check_constant
, mp_flag
;
15025 gfc_symtree
*symtree
;
15026 gfc_symtree
*this_symtree
;
15029 symbol_attribute class_attr
;
15030 gfc_array_spec
*as
;
15031 bool saved_specification_expr
;
15037 /* No symbol will ever have union type; only components can be unions.
15038 Union type declaration symbols have type BT_UNKNOWN but flavor FL_UNION
15039 (just like derived type declaration symbols have flavor FL_DERIVED). */
15040 gcc_assert (sym
->ts
.type
!= BT_UNION
);
15042 /* Coarrayed polymorphic objects with allocatable or pointer components are
15043 yet unsupported for -fcoarray=lib. */
15044 if (flag_coarray
== GFC_FCOARRAY_LIB
&& sym
->ts
.type
== BT_CLASS
15045 && sym
->ts
.u
.derived
&& CLASS_DATA (sym
)
15046 && CLASS_DATA (sym
)->attr
.codimension
15047 && (CLASS_DATA (sym
)->ts
.u
.derived
->attr
.alloc_comp
15048 || CLASS_DATA (sym
)->ts
.u
.derived
->attr
.pointer_comp
))
15050 gfc_error ("Sorry, allocatable/pointer components in polymorphic (CLASS) "
15051 "type coarrays at %L are unsupported", &sym
->declared_at
);
15055 if (sym
->attr
.artificial
)
15058 if (sym
->attr
.unlimited_polymorphic
)
15061 if (sym
->attr
.flavor
== FL_UNKNOWN
15062 || (sym
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.intrinsic
15063 && !sym
->attr
.generic
&& !sym
->attr
.external
15064 && sym
->attr
.if_source
== IFSRC_UNKNOWN
15065 && sym
->ts
.type
== BT_UNKNOWN
))
15068 /* If we find that a flavorless symbol is an interface in one of the
15069 parent namespaces, find its symtree in this namespace, free the
15070 symbol and set the symtree to point to the interface symbol. */
15071 for (ns
= gfc_current_ns
->parent
; ns
; ns
= ns
->parent
)
15073 symtree
= gfc_find_symtree (ns
->sym_root
, sym
->name
);
15074 if (symtree
&& (symtree
->n
.sym
->generic
||
15075 (symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
15076 && sym
->ns
->construct_entities
)))
15078 this_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
15080 if (this_symtree
->n
.sym
== sym
)
15082 symtree
->n
.sym
->refs
++;
15083 gfc_release_symbol (sym
);
15084 this_symtree
->n
.sym
= symtree
->n
.sym
;
15090 /* Otherwise give it a flavor according to such attributes as
15092 if (sym
->attr
.flavor
== FL_UNKNOWN
&& sym
->attr
.external
== 0
15093 && sym
->attr
.intrinsic
== 0)
15094 sym
->attr
.flavor
= FL_VARIABLE
;
15095 else if (sym
->attr
.flavor
== FL_UNKNOWN
)
15097 sym
->attr
.flavor
= FL_PROCEDURE
;
15098 if (sym
->attr
.dimension
)
15099 sym
->attr
.function
= 1;
15103 if (sym
->attr
.external
&& sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.function
)
15104 gfc_add_function (&sym
->attr
, sym
->name
, &sym
->declared_at
);
15106 if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
15107 && !resolve_procedure_interface (sym
))
15110 if (sym
->attr
.is_protected
&& !sym
->attr
.proc_pointer
15111 && (sym
->attr
.procedure
|| sym
->attr
.external
))
15113 if (sym
->attr
.external
)
15114 gfc_error ("PROTECTED attribute conflicts with EXTERNAL attribute "
15115 "at %L", &sym
->declared_at
);
15117 gfc_error ("PROCEDURE attribute conflicts with PROTECTED attribute "
15118 "at %L", &sym
->declared_at
);
15123 if (sym
->attr
.flavor
== FL_DERIVED
&& !resolve_fl_derived (sym
))
15126 else if ((sym
->attr
.flavor
== FL_STRUCT
|| sym
->attr
.flavor
== FL_UNION
)
15127 && !resolve_fl_struct (sym
))
15130 /* Symbols that are module procedures with results (functions) have
15131 the types and array specification copied for type checking in
15132 procedures that call them, as well as for saving to a module
15133 file. These symbols can't stand the scrutiny that their results
15135 mp_flag
= (sym
->result
!= NULL
&& sym
->result
!= sym
);
15137 /* Make sure that the intrinsic is consistent with its internal
15138 representation. This needs to be done before assigning a default
15139 type to avoid spurious warnings. */
15140 if (sym
->attr
.flavor
!= FL_MODULE
&& sym
->attr
.intrinsic
15141 && !gfc_resolve_intrinsic (sym
, &sym
->declared_at
))
15144 /* Resolve associate names. */
15146 resolve_assoc_var (sym
, true);
15148 /* Assign default type to symbols that need one and don't have one. */
15149 if (sym
->ts
.type
== BT_UNKNOWN
)
15151 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
)
15153 gfc_set_default_type (sym
, 1, NULL
);
15156 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.external
15157 && !sym
->attr
.function
&& !sym
->attr
.subroutine
15158 && gfc_get_default_type (sym
->name
, sym
->ns
)->type
== BT_UNKNOWN
)
15159 gfc_add_subroutine (&sym
->attr
, sym
->name
, &sym
->declared_at
);
15161 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
15163 /* The specific case of an external procedure should emit an error
15164 in the case that there is no implicit type. */
15167 if (!sym
->attr
.mixed_entry_master
)
15168 gfc_set_default_type (sym
, sym
->attr
.external
, NULL
);
15172 /* Result may be in another namespace. */
15173 resolve_symbol (sym
->result
);
15175 if (!sym
->result
->attr
.proc_pointer
)
15177 sym
->ts
= sym
->result
->ts
;
15178 sym
->as
= gfc_copy_array_spec (sym
->result
->as
);
15179 sym
->attr
.dimension
= sym
->result
->attr
.dimension
;
15180 sym
->attr
.pointer
= sym
->result
->attr
.pointer
;
15181 sym
->attr
.allocatable
= sym
->result
->attr
.allocatable
;
15182 sym
->attr
.contiguous
= sym
->result
->attr
.contiguous
;
15187 else if (mp_flag
&& sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
15189 bool saved_specification_expr
= specification_expr
;
15190 specification_expr
= true;
15191 gfc_resolve_array_spec (sym
->result
->as
, false);
15192 specification_expr
= saved_specification_expr
;
15195 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
15197 as
= CLASS_DATA (sym
)->as
;
15198 class_attr
= CLASS_DATA (sym
)->attr
;
15199 class_attr
.pointer
= class_attr
.class_pointer
;
15203 class_attr
= sym
->attr
;
15208 if (sym
->attr
.contiguous
15209 && (!class_attr
.dimension
15210 || (as
->type
!= AS_ASSUMED_SHAPE
&& as
->type
!= AS_ASSUMED_RANK
15211 && !class_attr
.pointer
)))
15213 gfc_error ("%qs at %L has the CONTIGUOUS attribute but is not an "
15214 "array pointer or an assumed-shape or assumed-rank array",
15215 sym
->name
, &sym
->declared_at
);
15219 /* Assumed size arrays and assumed shape arrays must be dummy
15220 arguments. Array-spec's of implied-shape should have been resolved to
15221 AS_EXPLICIT already. */
15225 /* If AS_IMPLIED_SHAPE makes it to here, it must be a bad
15226 specification expression. */
15227 if (as
->type
== AS_IMPLIED_SHAPE
)
15230 for (i
=0; i
<as
->rank
; i
++)
15232 if (as
->lower
[i
] != NULL
&& as
->upper
[i
] == NULL
)
15234 gfc_error ("Bad specification for assumed size array at %L",
15235 &as
->lower
[i
]->where
);
15242 if (((as
->type
== AS_ASSUMED_SIZE
&& !as
->cp_was_assumed
)
15243 || as
->type
== AS_ASSUMED_SHAPE
)
15244 && !sym
->attr
.dummy
&& !sym
->attr
.select_type_temporary
)
15246 if (as
->type
== AS_ASSUMED_SIZE
)
15247 gfc_error ("Assumed size array at %L must be a dummy argument",
15248 &sym
->declared_at
);
15250 gfc_error ("Assumed shape array at %L must be a dummy argument",
15251 &sym
->declared_at
);
15254 /* TS 29113, C535a. */
15255 if (as
->type
== AS_ASSUMED_RANK
&& !sym
->attr
.dummy
15256 && !sym
->attr
.select_type_temporary
15257 && !(cs_base
&& cs_base
->current
15258 && cs_base
->current
->op
== EXEC_SELECT_RANK
))
15260 gfc_error ("Assumed-rank array at %L must be a dummy argument",
15261 &sym
->declared_at
);
15264 if (as
->type
== AS_ASSUMED_RANK
15265 && (sym
->attr
.codimension
|| sym
->attr
.value
))
15267 gfc_error ("Assumed-rank array at %L may not have the VALUE or "
15268 "CODIMENSION attribute", &sym
->declared_at
);
15273 /* Make sure symbols with known intent or optional are really dummy
15274 variable. Because of ENTRY statement, this has to be deferred
15275 until resolution time. */
15277 if (!sym
->attr
.dummy
15278 && (sym
->attr
.optional
|| sym
->attr
.intent
!= INTENT_UNKNOWN
))
15280 gfc_error ("Symbol at %L is not a DUMMY variable", &sym
->declared_at
);
15284 if (sym
->attr
.value
&& !sym
->attr
.dummy
)
15286 gfc_error ("%qs at %L cannot have the VALUE attribute because "
15287 "it is not a dummy argument", sym
->name
, &sym
->declared_at
);
15291 if (sym
->attr
.value
&& sym
->ts
.type
== BT_CHARACTER
)
15293 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
15294 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
15296 gfc_error ("Character dummy variable %qs at %L with VALUE "
15297 "attribute must have constant length",
15298 sym
->name
, &sym
->declared_at
);
15302 if (sym
->ts
.is_c_interop
15303 && mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
15305 gfc_error ("C interoperable character dummy variable %qs at %L "
15306 "with VALUE attribute must have length one",
15307 sym
->name
, &sym
->declared_at
);
15312 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15313 && sym
->ts
.u
.derived
->attr
.generic
)
15315 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
15316 if (!sym
->ts
.u
.derived
)
15318 gfc_error ("The derived type %qs at %L is of type %qs, "
15319 "which has not been defined", sym
->name
,
15320 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15321 sym
->ts
.type
= BT_UNKNOWN
;
15326 /* Use the same constraints as TYPE(*), except for the type check
15327 and that only scalars and assumed-size arrays are permitted. */
15328 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
15330 if (!sym
->attr
.dummy
)
15332 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
15333 "a dummy argument", sym
->name
, &sym
->declared_at
);
15337 if (sym
->ts
.type
!= BT_ASSUMED
&& sym
->ts
.type
!= BT_INTEGER
15338 && sym
->ts
.type
!= BT_REAL
&& sym
->ts
.type
!= BT_LOGICAL
15339 && sym
->ts
.type
!= BT_COMPLEX
)
15341 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
15342 "of type TYPE(*) or of an numeric intrinsic type",
15343 sym
->name
, &sym
->declared_at
);
15347 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
15348 || sym
->attr
.pointer
|| sym
->attr
.value
)
15350 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
15351 "have the ALLOCATABLE, CODIMENSION, POINTER or VALUE "
15352 "attribute", sym
->name
, &sym
->declared_at
);
15356 if (sym
->attr
.intent
== INTENT_OUT
)
15358 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
15359 "have the INTENT(OUT) attribute",
15360 sym
->name
, &sym
->declared_at
);
15363 if (sym
->attr
.dimension
&& sym
->as
->type
!= AS_ASSUMED_SIZE
)
15365 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall "
15366 "either be a scalar or an assumed-size array",
15367 sym
->name
, &sym
->declared_at
);
15371 /* Set the type to TYPE(*) and add a dimension(*) to ensure
15372 NO_ARG_CHECK is correctly handled in trans*.c, e.g. with
15374 sym
->ts
.type
= BT_ASSUMED
;
15375 sym
->as
= gfc_get_array_spec ();
15376 sym
->as
->type
= AS_ASSUMED_SIZE
;
15378 sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
15380 else if (sym
->ts
.type
== BT_ASSUMED
)
15382 /* TS 29113, C407a. */
15383 if (!sym
->attr
.dummy
)
15385 gfc_error ("Assumed type of variable %s at %L is only permitted "
15386 "for dummy variables", sym
->name
, &sym
->declared_at
);
15389 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
15390 || sym
->attr
.pointer
|| sym
->attr
.value
)
15392 gfc_error ("Assumed-type variable %s at %L may not have the "
15393 "ALLOCATABLE, CODIMENSION, POINTER or VALUE attribute",
15394 sym
->name
, &sym
->declared_at
);
15397 if (sym
->attr
.intent
== INTENT_OUT
)
15399 gfc_error ("Assumed-type variable %s at %L may not have the "
15400 "INTENT(OUT) attribute",
15401 sym
->name
, &sym
->declared_at
);
15404 if (sym
->attr
.dimension
&& sym
->as
->type
== AS_EXPLICIT
)
15406 gfc_error ("Assumed-type variable %s at %L shall not be an "
15407 "explicit-shape array", sym
->name
, &sym
->declared_at
);
15412 /* If the symbol is marked as bind(c), that it is declared at module level
15413 scope and verify its type and kind. Do not do the latter for symbols
15414 that are implicitly typed because that is handled in
15415 gfc_set_default_type. Handle dummy arguments and procedure definitions
15416 separately. Also, anything that is use associated is not handled here
15417 but instead is handled in the module it is declared in. Finally, derived
15418 type definitions are allowed to be BIND(C) since that only implies that
15419 they're interoperable, and they are checked fully for interoperability
15420 when a variable is declared of that type. */
15421 if (sym
->attr
.is_bind_c
&& sym
->attr
.use_assoc
== 0
15422 && sym
->attr
.dummy
== 0 && sym
->attr
.flavor
!= FL_PROCEDURE
15423 && sym
->attr
.flavor
!= FL_DERIVED
)
15427 /* First, make sure the variable is declared at the
15428 module-level scope (J3/04-007, Section 15.3). */
15429 if (sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
&&
15430 sym
->attr
.in_common
== 0)
15432 gfc_error ("Variable %qs at %L cannot be BIND(C) because it "
15433 "is neither a COMMON block nor declared at the "
15434 "module level scope", sym
->name
, &(sym
->declared_at
));
15437 else if (sym
->ts
.type
== BT_CHARACTER
15438 && (sym
->ts
.u
.cl
== NULL
|| sym
->ts
.u
.cl
->length
== NULL
15439 || !gfc_is_constant_expr (sym
->ts
.u
.cl
->length
)
15440 || mpz_cmp_si (sym
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
15442 gfc_error ("BIND(C) Variable %qs at %L must have length one",
15443 sym
->name
, &sym
->declared_at
);
15446 else if (sym
->common_head
!= NULL
&& sym
->attr
.implicit_type
== 0)
15448 t
= verify_com_block_vars_c_interop (sym
->common_head
);
15450 else if (sym
->attr
.implicit_type
== 0)
15452 /* If type() declaration, we need to verify that the components
15453 of the given type are all C interoperable, etc. */
15454 if (sym
->ts
.type
== BT_DERIVED
&&
15455 sym
->ts
.u
.derived
->attr
.is_c_interop
!= 1)
15457 /* Make sure the user marked the derived type as BIND(C). If
15458 not, call the verify routine. This could print an error
15459 for the derived type more than once if multiple variables
15460 of that type are declared. */
15461 if (sym
->ts
.u
.derived
->attr
.is_bind_c
!= 1)
15462 verify_bind_c_derived_type (sym
->ts
.u
.derived
);
15466 /* Verify the variable itself as C interoperable if it
15467 is BIND(C). It is not possible for this to succeed if
15468 the verify_bind_c_derived_type failed, so don't have to handle
15469 any error returned by verify_bind_c_derived_type. */
15470 t
= verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
15471 sym
->common_block
);
15476 /* clear the is_bind_c flag to prevent reporting errors more than
15477 once if something failed. */
15478 sym
->attr
.is_bind_c
= 0;
15483 /* If a derived type symbol has reached this point, without its
15484 type being declared, we have an error. Notice that most
15485 conditions that produce undefined derived types have already
15486 been dealt with. However, the likes of:
15487 implicit type(t) (t) ..... call foo (t) will get us here if
15488 the type is not declared in the scope of the implicit
15489 statement. Change the type to BT_UNKNOWN, both because it is so
15490 and to prevent an ICE. */
15491 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15492 && sym
->ts
.u
.derived
->components
== NULL
15493 && !sym
->ts
.u
.derived
->attr
.zero_comp
)
15495 gfc_error ("The derived type %qs at %L is of type %qs, "
15496 "which has not been defined", sym
->name
,
15497 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15498 sym
->ts
.type
= BT_UNKNOWN
;
15502 /* Make sure that the derived type has been resolved and that the
15503 derived type is visible in the symbol's namespace, if it is a
15504 module function and is not PRIVATE. */
15505 if (sym
->ts
.type
== BT_DERIVED
15506 && sym
->ts
.u
.derived
->attr
.use_assoc
15507 && sym
->ns
->proc_name
15508 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15509 && !resolve_fl_derived (sym
->ts
.u
.derived
))
15512 /* Unless the derived-type declaration is use associated, Fortran 95
15513 does not allow public entries of private derived types.
15514 See 4.4.1 (F95) and 4.5.1.1 (F2003); and related interpretation
15515 161 in 95-006r3. */
15516 if (sym
->ts
.type
== BT_DERIVED
15517 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15518 && !sym
->ts
.u
.derived
->attr
.use_assoc
15519 && gfc_check_symbol_access (sym
)
15520 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
15521 && !gfc_notify_std (GFC_STD_F2003
, "PUBLIC %s %qs at %L of PRIVATE "
15522 "derived type %qs",
15523 (sym
->attr
.flavor
== FL_PARAMETER
)
15524 ? "parameter" : "variable",
15525 sym
->name
, &sym
->declared_at
,
15526 sym
->ts
.u
.derived
->name
))
15529 /* F2008, C1302. */
15530 if (sym
->ts
.type
== BT_DERIVED
15531 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15532 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
15533 || sym
->ts
.u
.derived
->attr
.lock_comp
)
15534 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15536 gfc_error ("Variable %s at %L of type LOCK_TYPE or with subcomponent of "
15537 "type LOCK_TYPE must be a coarray", sym
->name
,
15538 &sym
->declared_at
);
15542 /* TS18508, C702/C703. */
15543 if (sym
->ts
.type
== BT_DERIVED
15544 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15545 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
15546 || sym
->ts
.u
.derived
->attr
.event_comp
)
15547 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15549 gfc_error ("Variable %s at %L of type EVENT_TYPE or with subcomponent of "
15550 "type EVENT_TYPE must be a coarray", sym
->name
,
15551 &sym
->declared_at
);
15555 /* An assumed-size array with INTENT(OUT) shall not be of a type for which
15556 default initialization is defined (5.1.2.4.4). */
15557 if (sym
->ts
.type
== BT_DERIVED
15559 && sym
->attr
.intent
== INTENT_OUT
15561 && sym
->as
->type
== AS_ASSUMED_SIZE
)
15563 for (c
= sym
->ts
.u
.derived
->components
; c
; c
= c
->next
)
15565 if (c
->initializer
)
15567 gfc_error ("The INTENT(OUT) dummy argument %qs at %L is "
15568 "ASSUMED SIZE and so cannot have a default initializer",
15569 sym
->name
, &sym
->declared_at
);
15576 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15577 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.lock_comp
)
15579 gfc_error ("Dummy argument %qs at %L of LOCK_TYPE shall not be "
15580 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15585 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15586 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.event_comp
)
15588 gfc_error ("Dummy argument %qs at %L of EVENT_TYPE shall not be "
15589 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15594 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15595 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15596 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15597 || class_attr
.codimension
)
15598 && (sym
->attr
.result
|| sym
->result
== sym
))
15600 gfc_error ("Function result %qs at %L shall not be a coarray or have "
15601 "a coarray component", sym
->name
, &sym
->declared_at
);
15606 if (sym
->attr
.codimension
&& sym
->ts
.type
== BT_DERIVED
15607 && sym
->ts
.u
.derived
->ts
.is_iso_c
)
15609 gfc_error ("Variable %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
15610 "shall not be a coarray", sym
->name
, &sym
->declared_at
);
15615 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15616 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15617 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15618 && (class_attr
.codimension
|| class_attr
.pointer
|| class_attr
.dimension
15619 || class_attr
.allocatable
))
15621 gfc_error ("Variable %qs at %L with coarray component shall be a "
15622 "nonpointer, nonallocatable scalar, which is not a coarray",
15623 sym
->name
, &sym
->declared_at
);
15627 /* F2008, C526. The function-result case was handled above. */
15628 if (class_attr
.codimension
15629 && !(class_attr
.allocatable
|| sym
->attr
.dummy
|| sym
->attr
.save
15630 || sym
->attr
.select_type_temporary
15631 || sym
->attr
.associate_var
15632 || (sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15633 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15634 || sym
->ns
->proc_name
->attr
.is_main_program
15635 || sym
->attr
.function
|| sym
->attr
.result
|| sym
->attr
.use_assoc
))
15637 gfc_error ("Variable %qs at %L is a coarray and is not ALLOCATABLE, SAVE "
15638 "nor a dummy argument", sym
->name
, &sym
->declared_at
);
15642 else if (class_attr
.codimension
&& !sym
->attr
.select_type_temporary
15643 && !class_attr
.allocatable
&& as
&& as
->cotype
== AS_DEFERRED
)
15645 gfc_error ("Coarray variable %qs at %L shall not have codimensions with "
15646 "deferred shape", sym
->name
, &sym
->declared_at
);
15649 else if (class_attr
.codimension
&& class_attr
.allocatable
&& as
15650 && (as
->cotype
!= AS_DEFERRED
|| as
->type
!= AS_DEFERRED
))
15652 gfc_error ("Allocatable coarray variable %qs at %L must have "
15653 "deferred shape", sym
->name
, &sym
->declared_at
);
15658 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15659 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15660 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15661 || (class_attr
.codimension
&& class_attr
.allocatable
))
15662 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
)
15664 gfc_error ("Variable %qs at %L is INTENT(OUT) and can thus not be an "
15665 "allocatable coarray or have coarray components",
15666 sym
->name
, &sym
->declared_at
);
15670 if (class_attr
.codimension
&& sym
->attr
.dummy
15671 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.is_bind_c
)
15673 gfc_error ("Coarray dummy variable %qs at %L not allowed in BIND(C) "
15674 "procedure %qs", sym
->name
, &sym
->declared_at
,
15675 sym
->ns
->proc_name
->name
);
15679 if (sym
->ts
.type
== BT_LOGICAL
15680 && ((sym
->attr
.function
&& sym
->attr
.is_bind_c
&& sym
->result
== sym
)
15681 || ((sym
->attr
.dummy
|| sym
->attr
.result
) && sym
->ns
->proc_name
15682 && sym
->ns
->proc_name
->attr
.is_bind_c
)))
15685 for (i
= 0; gfc_logical_kinds
[i
].kind
; i
++)
15686 if (gfc_logical_kinds
[i
].kind
== sym
->ts
.kind
)
15688 if (!gfc_logical_kinds
[i
].c_bool
&& sym
->attr
.dummy
15689 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL dummy argument %qs at "
15690 "%L with non-C_Bool kind in BIND(C) procedure "
15691 "%qs", sym
->name
, &sym
->declared_at
,
15692 sym
->ns
->proc_name
->name
))
15694 else if (!gfc_logical_kinds
[i
].c_bool
15695 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL result variable "
15696 "%qs at %L with non-C_Bool kind in "
15697 "BIND(C) procedure %qs", sym
->name
,
15699 sym
->attr
.function
? sym
->name
15700 : sym
->ns
->proc_name
->name
))
15704 switch (sym
->attr
.flavor
)
15707 if (!resolve_fl_variable (sym
, mp_flag
))
15712 if (sym
->formal
&& !sym
->formal_ns
)
15714 /* Check that none of the arguments are a namelist. */
15715 gfc_formal_arglist
*formal
= sym
->formal
;
15717 for (; formal
; formal
= formal
->next
)
15718 if (formal
->sym
&& formal
->sym
->attr
.flavor
== FL_NAMELIST
)
15720 gfc_error ("Namelist %qs cannot be an argument to "
15721 "subroutine or function at %L",
15722 formal
->sym
->name
, &sym
->declared_at
);
15727 if (!resolve_fl_procedure (sym
, mp_flag
))
15732 if (!resolve_fl_namelist (sym
))
15737 if (!resolve_fl_parameter (sym
))
15745 /* Resolve array specifier. Check as well some constraints
15746 on COMMON blocks. */
15748 check_constant
= sym
->attr
.in_common
&& !sym
->attr
.pointer
;
15750 /* Set the formal_arg_flag so that check_conflict will not throw
15751 an error for host associated variables in the specification
15752 expression for an array_valued function. */
15753 if ((sym
->attr
.function
|| sym
->attr
.result
) && sym
->as
)
15754 formal_arg_flag
= true;
15756 saved_specification_expr
= specification_expr
;
15757 specification_expr
= true;
15758 gfc_resolve_array_spec (sym
->as
, check_constant
);
15759 specification_expr
= saved_specification_expr
;
15761 formal_arg_flag
= false;
15763 /* Resolve formal namespaces. */
15764 if (sym
->formal_ns
&& sym
->formal_ns
!= gfc_current_ns
15765 && !sym
->attr
.contained
&& !sym
->attr
.intrinsic
)
15766 gfc_resolve (sym
->formal_ns
);
15768 /* Make sure the formal namespace is present. */
15769 if (sym
->formal
&& !sym
->formal_ns
)
15771 gfc_formal_arglist
*formal
= sym
->formal
;
15772 while (formal
&& !formal
->sym
)
15773 formal
= formal
->next
;
15777 sym
->formal_ns
= formal
->sym
->ns
;
15778 if (sym
->ns
!= formal
->sym
->ns
)
15779 sym
->formal_ns
->refs
++;
15783 /* Check threadprivate restrictions. */
15784 if (sym
->attr
.threadprivate
&& !sym
->attr
.save
15785 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15786 && (!sym
->attr
.in_common
15787 && sym
->module
== NULL
15788 && (sym
->ns
->proc_name
== NULL
15789 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15790 gfc_error ("Threadprivate at %L isn't SAVEd", &sym
->declared_at
);
15792 /* Check omp declare target restrictions. */
15793 if (sym
->attr
.omp_declare_target
15794 && sym
->attr
.flavor
== FL_VARIABLE
15796 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15797 && (!sym
->attr
.in_common
15798 && sym
->module
== NULL
15799 && (sym
->ns
->proc_name
== NULL
15800 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15801 gfc_error ("!$OMP DECLARE TARGET variable %qs at %L isn't SAVEd",
15802 sym
->name
, &sym
->declared_at
);
15804 /* If we have come this far we can apply default-initializers, as
15805 described in 14.7.5, to those variables that have not already
15806 been assigned one. */
15807 if (sym
->ts
.type
== BT_DERIVED
15809 && !sym
->attr
.allocatable
15810 && !sym
->attr
.alloc_comp
)
15812 symbol_attribute
*a
= &sym
->attr
;
15814 if ((!a
->save
&& !a
->dummy
&& !a
->pointer
15815 && !a
->in_common
&& !a
->use_assoc
15817 && !((a
->function
|| a
->result
)
15819 || sym
->ts
.u
.derived
->attr
.alloc_comp
15820 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15821 && !(a
->function
&& sym
!= sym
->result
))
15822 || (a
->dummy
&& a
->intent
== INTENT_OUT
&& !a
->pointer
))
15823 apply_default_init (sym
);
15824 else if (a
->function
&& sym
->result
&& a
->access
!= ACCESS_PRIVATE
15825 && (sym
->ts
.u
.derived
->attr
.alloc_comp
15826 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15827 /* Mark the result symbol to be referenced, when it has allocatable
15829 sym
->result
->attr
.referenced
= 1;
15832 if (sym
->ts
.type
== BT_CLASS
&& sym
->ns
== gfc_current_ns
15833 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
15834 && !CLASS_DATA (sym
)->attr
.class_pointer
15835 && !CLASS_DATA (sym
)->attr
.allocatable
)
15836 apply_default_init (sym
);
15838 /* If this symbol has a type-spec, check it. */
15839 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
15840 || (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
))
15841 if (!resolve_typespec_used (&sym
->ts
, &sym
->declared_at
, sym
->name
))
15844 if (sym
->param_list
)
15849 /************* Resolve DATA statements *************/
15853 gfc_data_value
*vnode
;
15859 /* Advance the values structure to point to the next value in the data list. */
15862 next_data_value (void)
15864 while (mpz_cmp_ui (values
.left
, 0) == 0)
15867 if (values
.vnode
->next
== NULL
)
15870 values
.vnode
= values
.vnode
->next
;
15871 mpz_set (values
.left
, values
.vnode
->repeat
);
15879 check_data_variable (gfc_data_variable
*var
, locus
*where
)
15885 ar_type mark
= AR_UNKNOWN
;
15887 mpz_t section_index
[GFC_MAX_DIMENSIONS
];
15893 if (!gfc_resolve_expr (var
->expr
))
15897 mpz_init_set_si (offset
, 0);
15900 if (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
15901 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
15902 e
= e
->value
.function
.actual
->expr
;
15904 if (e
->expr_type
!= EXPR_VARIABLE
)
15906 gfc_error ("Expecting definable entity near %L", where
);
15910 sym
= e
->symtree
->n
.sym
;
15912 if (sym
->ns
->is_block_data
&& !sym
->attr
.in_common
)
15914 gfc_error ("BLOCK DATA element %qs at %L must be in COMMON",
15915 sym
->name
, &sym
->declared_at
);
15919 if (e
->ref
== NULL
&& sym
->as
)
15921 gfc_error ("DATA array %qs at %L must be specified in a previous"
15922 " declaration", sym
->name
, where
);
15926 if (gfc_is_coindexed (e
))
15928 gfc_error ("DATA element %qs at %L cannot have a coindex", sym
->name
,
15933 has_pointer
= sym
->attr
.pointer
;
15935 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15937 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.pointer
)
15942 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.type
!= AR_FULL
)
15944 gfc_error ("DATA element %qs at %L is a pointer and so must "
15945 "be a full array", sym
->name
, where
);
15949 if (values
.vnode
->expr
->expr_type
== EXPR_CONSTANT
)
15951 gfc_error ("DATA object near %L has the pointer attribute "
15952 "and the corresponding DATA value is not a valid "
15953 "initial-data-target", where
);
15959 if (e
->rank
== 0 || has_pointer
)
15961 mpz_init_set_ui (size
, 1);
15968 /* Find the array section reference. */
15969 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15971 if (ref
->type
!= REF_ARRAY
)
15973 if (ref
->u
.ar
.type
== AR_ELEMENT
)
15979 /* Set marks according to the reference pattern. */
15980 switch (ref
->u
.ar
.type
)
15988 /* Get the start position of array section. */
15989 gfc_get_section_index (ar
, section_index
, &offset
);
15994 gcc_unreachable ();
15997 if (!gfc_array_size (e
, &size
))
15999 gfc_error ("Nonconstant array section at %L in DATA statement",
16001 mpz_clear (offset
);
16008 while (mpz_cmp_ui (size
, 0) > 0)
16010 if (!next_data_value ())
16012 gfc_error ("DATA statement at %L has more variables than values",
16018 t
= gfc_check_assign (var
->expr
, values
.vnode
->expr
, 0);
16022 /* If we have more than one element left in the repeat count,
16023 and we have more than one element left in the target variable,
16024 then create a range assignment. */
16025 /* FIXME: Only done for full arrays for now, since array sections
16027 if (mark
== AR_FULL
&& ref
&& ref
->next
== NULL
16028 && mpz_cmp_ui (values
.left
, 1) > 0 && mpz_cmp_ui (size
, 1) > 0)
16032 if (mpz_cmp (size
, values
.left
) >= 0)
16034 mpz_init_set (range
, values
.left
);
16035 mpz_sub (size
, size
, values
.left
);
16036 mpz_set_ui (values
.left
, 0);
16040 mpz_init_set (range
, size
);
16041 mpz_sub (values
.left
, values
.left
, size
);
16042 mpz_set_ui (size
, 0);
16045 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
16048 mpz_add (offset
, offset
, range
);
16055 /* Assign initial value to symbol. */
16058 mpz_sub_ui (values
.left
, values
.left
, 1);
16059 mpz_sub_ui (size
, size
, 1);
16061 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
16066 if (mark
== AR_FULL
)
16067 mpz_add_ui (offset
, offset
, 1);
16069 /* Modify the array section indexes and recalculate the offset
16070 for next element. */
16071 else if (mark
== AR_SECTION
)
16072 gfc_advance_section (section_index
, ar
, &offset
);
16076 if (mark
== AR_SECTION
)
16078 for (i
= 0; i
< ar
->dimen
; i
++)
16079 mpz_clear (section_index
[i
]);
16083 mpz_clear (offset
);
16089 static bool traverse_data_var (gfc_data_variable
*, locus
*);
16091 /* Iterate over a list of elements in a DATA statement. */
16094 traverse_data_list (gfc_data_variable
*var
, locus
*where
)
16097 iterator_stack frame
;
16098 gfc_expr
*e
, *start
, *end
, *step
;
16099 bool retval
= true;
16101 mpz_init (frame
.value
);
16104 start
= gfc_copy_expr (var
->iter
.start
);
16105 end
= gfc_copy_expr (var
->iter
.end
);
16106 step
= gfc_copy_expr (var
->iter
.step
);
16108 if (!gfc_simplify_expr (start
, 1)
16109 || start
->expr_type
!= EXPR_CONSTANT
)
16111 gfc_error ("start of implied-do loop at %L could not be "
16112 "simplified to a constant value", &start
->where
);
16116 if (!gfc_simplify_expr (end
, 1)
16117 || end
->expr_type
!= EXPR_CONSTANT
)
16119 gfc_error ("end of implied-do loop at %L could not be "
16120 "simplified to a constant value", &start
->where
);
16124 if (!gfc_simplify_expr (step
, 1)
16125 || step
->expr_type
!= EXPR_CONSTANT
)
16127 gfc_error ("step of implied-do loop at %L could not be "
16128 "simplified to a constant value", &start
->where
);
16133 mpz_set (trip
, end
->value
.integer
);
16134 mpz_sub (trip
, trip
, start
->value
.integer
);
16135 mpz_add (trip
, trip
, step
->value
.integer
);
16137 mpz_div (trip
, trip
, step
->value
.integer
);
16139 mpz_set (frame
.value
, start
->value
.integer
);
16141 frame
.prev
= iter_stack
;
16142 frame
.variable
= var
->iter
.var
->symtree
;
16143 iter_stack
= &frame
;
16145 while (mpz_cmp_ui (trip
, 0) > 0)
16147 if (!traverse_data_var (var
->list
, where
))
16153 e
= gfc_copy_expr (var
->expr
);
16154 if (!gfc_simplify_expr (e
, 1))
16161 mpz_add (frame
.value
, frame
.value
, step
->value
.integer
);
16163 mpz_sub_ui (trip
, trip
, 1);
16167 mpz_clear (frame
.value
);
16170 gfc_free_expr (start
);
16171 gfc_free_expr (end
);
16172 gfc_free_expr (step
);
16174 iter_stack
= frame
.prev
;
16179 /* Type resolve variables in the variable list of a DATA statement. */
16182 traverse_data_var (gfc_data_variable
*var
, locus
*where
)
16186 for (; var
; var
= var
->next
)
16188 if (var
->expr
== NULL
)
16189 t
= traverse_data_list (var
, where
);
16191 t
= check_data_variable (var
, where
);
16201 /* Resolve the expressions and iterators associated with a data statement.
16202 This is separate from the assignment checking because data lists should
16203 only be resolved once. */
16206 resolve_data_variables (gfc_data_variable
*d
)
16208 for (; d
; d
= d
->next
)
16210 if (d
->list
== NULL
)
16212 if (!gfc_resolve_expr (d
->expr
))
16217 if (!gfc_resolve_iterator (&d
->iter
, false, true))
16220 if (!resolve_data_variables (d
->list
))
16229 /* Resolve a single DATA statement. We implement this by storing a pointer to
16230 the value list into static variables, and then recursively traversing the
16231 variables list, expanding iterators and such. */
16234 resolve_data (gfc_data
*d
)
16237 if (!resolve_data_variables (d
->var
))
16240 values
.vnode
= d
->value
;
16241 if (d
->value
== NULL
)
16242 mpz_set_ui (values
.left
, 0);
16244 mpz_set (values
.left
, d
->value
->repeat
);
16246 if (!traverse_data_var (d
->var
, &d
->where
))
16249 /* At this point, we better not have any values left. */
16251 if (next_data_value ())
16252 gfc_error ("DATA statement at %L has more values than variables",
16257 /* 12.6 Constraint: In a pure subprogram any variable which is in common or
16258 accessed by host or use association, is a dummy argument to a pure function,
16259 is a dummy argument with INTENT (IN) to a pure subroutine, or an object that
16260 is storage associated with any such variable, shall not be used in the
16261 following contexts: (clients of this function). */
16263 /* Determines if a variable is not 'pure', i.e., not assignable within a pure
16264 procedure. Returns zero if assignment is OK, nonzero if there is a
16267 gfc_impure_variable (gfc_symbol
*sym
)
16272 if (sym
->attr
.use_assoc
|| sym
->attr
.in_common
)
16275 /* Check if the symbol's ns is inside the pure procedure. */
16276 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16280 if (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.function
)
16284 proc
= sym
->ns
->proc_name
;
16285 if (sym
->attr
.dummy
16286 && ((proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_IN
)
16287 || proc
->attr
.function
))
16290 /* TODO: Sort out what can be storage associated, if anything, and include
16291 it here. In principle equivalences should be scanned but it does not
16292 seem to be possible to storage associate an impure variable this way. */
16297 /* Test whether a symbol is pure or not. For a NULL pointer, checks if the
16298 current namespace is inside a pure procedure. */
16301 gfc_pure (gfc_symbol
*sym
)
16303 symbol_attribute attr
;
16308 /* Check if the current namespace or one of its parents
16309 belongs to a pure procedure. */
16310 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16312 sym
= ns
->proc_name
;
16316 if (attr
.flavor
== FL_PROCEDURE
&& attr
.pure
)
16324 return attr
.flavor
== FL_PROCEDURE
&& attr
.pure
;
16328 /* Test whether a symbol is implicitly pure or not. For a NULL pointer,
16329 checks if the current namespace is implicitly pure. Note that this
16330 function returns false for a PURE procedure. */
16333 gfc_implicit_pure (gfc_symbol
*sym
)
16339 /* Check if the current procedure is implicit_pure. Walk up
16340 the procedure list until we find a procedure. */
16341 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16343 sym
= ns
->proc_name
;
16347 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16352 return sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.implicit_pure
16353 && !sym
->attr
.pure
;
16358 gfc_unset_implicit_pure (gfc_symbol
*sym
)
16364 /* Check if the current procedure is implicit_pure. Walk up
16365 the procedure list until we find a procedure. */
16366 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16368 sym
= ns
->proc_name
;
16372 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16377 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16378 sym
->attr
.implicit_pure
= 0;
16380 sym
->attr
.pure
= 0;
16384 /* Test whether the current procedure is elemental or not. */
16387 gfc_elemental (gfc_symbol
*sym
)
16389 symbol_attribute attr
;
16392 sym
= gfc_current_ns
->proc_name
;
16397 return attr
.flavor
== FL_PROCEDURE
&& attr
.elemental
;
16401 /* Warn about unused labels. */
16404 warn_unused_fortran_label (gfc_st_label
*label
)
16409 warn_unused_fortran_label (label
->left
);
16411 if (label
->defined
== ST_LABEL_UNKNOWN
)
16414 switch (label
->referenced
)
16416 case ST_LABEL_UNKNOWN
:
16417 gfc_warning (OPT_Wunused_label
, "Label %d at %L defined but not used",
16418 label
->value
, &label
->where
);
16421 case ST_LABEL_BAD_TARGET
:
16422 gfc_warning (OPT_Wunused_label
,
16423 "Label %d at %L defined but cannot be used",
16424 label
->value
, &label
->where
);
16431 warn_unused_fortran_label (label
->right
);
16435 /* Returns the sequence type of a symbol or sequence. */
16438 sequence_type (gfc_typespec ts
)
16447 if (ts
.u
.derived
->components
== NULL
)
16448 return SEQ_NONDEFAULT
;
16450 result
= sequence_type (ts
.u
.derived
->components
->ts
);
16451 for (c
= ts
.u
.derived
->components
->next
; c
; c
= c
->next
)
16452 if (sequence_type (c
->ts
) != result
)
16458 if (ts
.kind
!= gfc_default_character_kind
)
16459 return SEQ_NONDEFAULT
;
16461 return SEQ_CHARACTER
;
16464 if (ts
.kind
!= gfc_default_integer_kind
)
16465 return SEQ_NONDEFAULT
;
16467 return SEQ_NUMERIC
;
16470 if (!(ts
.kind
== gfc_default_real_kind
16471 || ts
.kind
== gfc_default_double_kind
))
16472 return SEQ_NONDEFAULT
;
16474 return SEQ_NUMERIC
;
16477 if (ts
.kind
!= gfc_default_complex_kind
)
16478 return SEQ_NONDEFAULT
;
16480 return SEQ_NUMERIC
;
16483 if (ts
.kind
!= gfc_default_logical_kind
)
16484 return SEQ_NONDEFAULT
;
16486 return SEQ_NUMERIC
;
16489 return SEQ_NONDEFAULT
;
16494 /* Resolve derived type EQUIVALENCE object. */
16497 resolve_equivalence_derived (gfc_symbol
*derived
, gfc_symbol
*sym
, gfc_expr
*e
)
16499 gfc_component
*c
= derived
->components
;
16504 /* Shall not be an object of nonsequence derived type. */
16505 if (!derived
->attr
.sequence
)
16507 gfc_error ("Derived type variable %qs at %L must have SEQUENCE "
16508 "attribute to be an EQUIVALENCE object", sym
->name
,
16513 /* Shall not have allocatable components. */
16514 if (derived
->attr
.alloc_comp
)
16516 gfc_error ("Derived type variable %qs at %L cannot have ALLOCATABLE "
16517 "components to be an EQUIVALENCE object",sym
->name
,
16522 if (sym
->attr
.in_common
&& gfc_has_default_initializer (sym
->ts
.u
.derived
))
16524 gfc_error ("Derived type variable %qs at %L with default "
16525 "initialization cannot be in EQUIVALENCE with a variable "
16526 "in COMMON", sym
->name
, &e
->where
);
16530 for (; c
; c
= c
->next
)
16532 if (gfc_bt_struct (c
->ts
.type
)
16533 && (!resolve_equivalence_derived(c
->ts
.u
.derived
, sym
, e
)))
16536 /* Shall not be an object of sequence derived type containing a pointer
16537 in the structure. */
16538 if (c
->attr
.pointer
)
16540 gfc_error ("Derived type variable %qs at %L with pointer "
16541 "component(s) cannot be an EQUIVALENCE object",
16542 sym
->name
, &e
->where
);
16550 /* Resolve equivalence object.
16551 An EQUIVALENCE object shall not be a dummy argument, a pointer, a target,
16552 an allocatable array, an object of nonsequence derived type, an object of
16553 sequence derived type containing a pointer at any level of component
16554 selection, an automatic object, a function name, an entry name, a result
16555 name, a named constant, a structure component, or a subobject of any of
16556 the preceding objects. A substring shall not have length zero. A
16557 derived type shall not have components with default initialization nor
16558 shall two objects of an equivalence group be initialized.
16559 Either all or none of the objects shall have an protected attribute.
16560 The simple constraints are done in symbol.c(check_conflict) and the rest
16561 are implemented here. */
16564 resolve_equivalence (gfc_equiv
*eq
)
16567 gfc_symbol
*first_sym
;
16570 locus
*last_where
= NULL
;
16571 seq_type eq_type
, last_eq_type
;
16572 gfc_typespec
*last_ts
;
16573 int object
, cnt_protected
;
16576 last_ts
= &eq
->expr
->symtree
->n
.sym
->ts
;
16578 first_sym
= eq
->expr
->symtree
->n
.sym
;
16582 for (object
= 1; eq
; eq
= eq
->eq
, object
++)
16586 e
->ts
= e
->symtree
->n
.sym
->ts
;
16587 /* match_varspec might not know yet if it is seeing
16588 array reference or substring reference, as it doesn't
16590 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
)
16592 gfc_ref
*ref
= e
->ref
;
16593 sym
= e
->symtree
->n
.sym
;
16595 if (sym
->attr
.dimension
)
16597 ref
->u
.ar
.as
= sym
->as
;
16601 /* For substrings, convert REF_ARRAY into REF_SUBSTRING. */
16602 if (e
->ts
.type
== BT_CHARACTER
16604 && ref
->type
== REF_ARRAY
16605 && ref
->u
.ar
.dimen
== 1
16606 && ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
16607 && ref
->u
.ar
.stride
[0] == NULL
)
16609 gfc_expr
*start
= ref
->u
.ar
.start
[0];
16610 gfc_expr
*end
= ref
->u
.ar
.end
[0];
16613 /* Optimize away the (:) reference. */
16614 if (start
== NULL
&& end
== NULL
)
16617 e
->ref
= ref
->next
;
16619 e
->ref
->next
= ref
->next
;
16624 ref
->type
= REF_SUBSTRING
;
16626 start
= gfc_get_int_expr (gfc_charlen_int_kind
,
16628 ref
->u
.ss
.start
= start
;
16629 if (end
== NULL
&& e
->ts
.u
.cl
)
16630 end
= gfc_copy_expr (e
->ts
.u
.cl
->length
);
16631 ref
->u
.ss
.end
= end
;
16632 ref
->u
.ss
.length
= e
->ts
.u
.cl
;
16639 /* Any further ref is an error. */
16642 gcc_assert (ref
->type
== REF_ARRAY
);
16643 gfc_error ("Syntax error in EQUIVALENCE statement at %L",
16649 if (!gfc_resolve_expr (e
))
16652 sym
= e
->symtree
->n
.sym
;
16654 if (sym
->attr
.is_protected
)
16656 if (cnt_protected
> 0 && cnt_protected
!= object
)
16658 gfc_error ("Either all or none of the objects in the "
16659 "EQUIVALENCE set at %L shall have the "
16660 "PROTECTED attribute",
16665 /* Shall not equivalence common block variables in a PURE procedure. */
16666 if (sym
->ns
->proc_name
16667 && sym
->ns
->proc_name
->attr
.pure
16668 && sym
->attr
.in_common
)
16670 /* Need to check for symbols that may have entered the pure
16671 procedure via a USE statement. */
16672 bool saw_sym
= false;
16673 if (sym
->ns
->use_stmts
)
16676 for (r
= sym
->ns
->use_stmts
->rename
; r
; r
= r
->next
)
16677 if (strcmp(r
->use_name
, sym
->name
) == 0) saw_sym
= true;
16683 gfc_error ("COMMON block member %qs at %L cannot be an "
16684 "EQUIVALENCE object in the pure procedure %qs",
16685 sym
->name
, &e
->where
, sym
->ns
->proc_name
->name
);
16689 /* Shall not be a named constant. */
16690 if (e
->expr_type
== EXPR_CONSTANT
)
16692 gfc_error ("Named constant %qs at %L cannot be an EQUIVALENCE "
16693 "object", sym
->name
, &e
->where
);
16697 if (e
->ts
.type
== BT_DERIVED
16698 && !resolve_equivalence_derived (e
->ts
.u
.derived
, sym
, e
))
16701 /* Check that the types correspond correctly:
16703 A numeric sequence structure may be equivalenced to another sequence
16704 structure, an object of default integer type, default real type, double
16705 precision real type, default logical type such that components of the
16706 structure ultimately only become associated to objects of the same
16707 kind. A character sequence structure may be equivalenced to an object
16708 of default character kind or another character sequence structure.
16709 Other objects may be equivalenced only to objects of the same type and
16710 kind parameters. */
16712 /* Identical types are unconditionally OK. */
16713 if (object
== 1 || gfc_compare_types (last_ts
, &sym
->ts
))
16714 goto identical_types
;
16716 last_eq_type
= sequence_type (*last_ts
);
16717 eq_type
= sequence_type (sym
->ts
);
16719 /* Since the pair of objects is not of the same type, mixed or
16720 non-default sequences can be rejected. */
16722 msg
= "Sequence %s with mixed components in EQUIVALENCE "
16723 "statement at %L with different type objects";
16725 && last_eq_type
== SEQ_MIXED
16726 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16727 || (eq_type
== SEQ_MIXED
16728 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16731 msg
= "Non-default type object or sequence %s in EQUIVALENCE "
16732 "statement at %L with objects of different type";
16734 && last_eq_type
== SEQ_NONDEFAULT
16735 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16736 || (eq_type
== SEQ_NONDEFAULT
16737 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16740 msg
="Non-CHARACTER object %qs in default CHARACTER "
16741 "EQUIVALENCE statement at %L";
16742 if (last_eq_type
== SEQ_CHARACTER
16743 && eq_type
!= SEQ_CHARACTER
16744 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16747 msg
="Non-NUMERIC object %qs in default NUMERIC "
16748 "EQUIVALENCE statement at %L";
16749 if (last_eq_type
== SEQ_NUMERIC
16750 && eq_type
!= SEQ_NUMERIC
16751 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16756 last_where
= &e
->where
;
16761 /* Shall not be an automatic array. */
16762 if (e
->ref
->type
== REF_ARRAY
16763 && !gfc_resolve_array_spec (e
->ref
->u
.ar
.as
, 1))
16765 gfc_error ("Array %qs at %L with non-constant bounds cannot be "
16766 "an EQUIVALENCE object", sym
->name
, &e
->where
);
16773 /* Shall not be a structure component. */
16774 if (r
->type
== REF_COMPONENT
)
16776 gfc_error ("Structure component %qs at %L cannot be an "
16777 "EQUIVALENCE object",
16778 r
->u
.c
.component
->name
, &e
->where
);
16782 /* A substring shall not have length zero. */
16783 if (r
->type
== REF_SUBSTRING
)
16785 if (compare_bound (r
->u
.ss
.start
, r
->u
.ss
.end
) == CMP_GT
)
16787 gfc_error ("Substring at %L has length zero",
16788 &r
->u
.ss
.start
->where
);
16798 /* Function called by resolve_fntype to flag other symbols used in the
16799 length type parameter specification of function results. */
16802 flag_fn_result_spec (gfc_expr
*expr
,
16804 int *f ATTRIBUTE_UNUSED
)
16809 if (expr
->expr_type
== EXPR_VARIABLE
)
16811 s
= expr
->symtree
->n
.sym
;
16812 for (ns
= s
->ns
; ns
; ns
= ns
->parent
)
16818 gfc_error ("Self reference in character length expression "
16819 "for %qs at %L", sym
->name
, &expr
->where
);
16823 if (!s
->fn_result_spec
16824 && s
->attr
.flavor
== FL_PARAMETER
)
16826 /* Function contained in a module.... */
16827 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_MODULE
)
16830 s
->fn_result_spec
= 1;
16831 /* Make sure that this symbol is translated as a module
16833 st
= gfc_get_unique_symtree (ns
);
16837 /* ... which is use associated and called. */
16838 else if (s
->attr
.use_assoc
|| s
->attr
.used_in_submodule
16840 /* External function matched with an interface. */
16843 && s
->ns
->proc_name
->attr
.if_source
== IFSRC_DECL
)
16844 || s
->ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16845 && s
->ns
->proc_name
->attr
.function
))
16846 s
->fn_result_spec
= 1;
16853 /* Resolve function and ENTRY types, issue diagnostics if needed. */
16856 resolve_fntype (gfc_namespace
*ns
)
16858 gfc_entry_list
*el
;
16861 if (ns
->proc_name
== NULL
|| !ns
->proc_name
->attr
.function
)
16864 /* If there are any entries, ns->proc_name is the entry master
16865 synthetic symbol and ns->entries->sym actual FUNCTION symbol. */
16867 sym
= ns
->entries
->sym
;
16869 sym
= ns
->proc_name
;
16870 if (sym
->result
== sym
16871 && sym
->ts
.type
== BT_UNKNOWN
16872 && !gfc_set_default_type (sym
, 0, NULL
)
16873 && !sym
->attr
.untyped
)
16875 gfc_error ("Function %qs at %L has no IMPLICIT type",
16876 sym
->name
, &sym
->declared_at
);
16877 sym
->attr
.untyped
= 1;
16880 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->ts
.u
.derived
->attr
.use_assoc
16881 && !sym
->attr
.contained
16882 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
16883 && gfc_check_symbol_access (sym
))
16885 gfc_notify_std (GFC_STD_F2003
, "PUBLIC function %qs at "
16886 "%L of PRIVATE type %qs", sym
->name
,
16887 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
16891 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
16893 if (el
->sym
->result
== el
->sym
16894 && el
->sym
->ts
.type
== BT_UNKNOWN
16895 && !gfc_set_default_type (el
->sym
, 0, NULL
)
16896 && !el
->sym
->attr
.untyped
)
16898 gfc_error ("ENTRY %qs at %L has no IMPLICIT type",
16899 el
->sym
->name
, &el
->sym
->declared_at
);
16900 el
->sym
->attr
.untyped
= 1;
16904 if (sym
->ts
.type
== BT_CHARACTER
)
16905 gfc_traverse_expr (sym
->ts
.u
.cl
->length
, sym
, flag_fn_result_spec
, 0);
16909 /* 12.3.2.1.1 Defined operators. */
16912 check_uop_procedure (gfc_symbol
*sym
, locus where
)
16914 gfc_formal_arglist
*formal
;
16916 if (!sym
->attr
.function
)
16918 gfc_error ("User operator procedure %qs at %L must be a FUNCTION",
16919 sym
->name
, &where
);
16923 if (sym
->ts
.type
== BT_CHARACTER
16924 && !((sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
) || sym
->ts
.deferred
)
16925 && !(sym
->result
&& ((sym
->result
->ts
.u
.cl
16926 && sym
->result
->ts
.u
.cl
->length
) || sym
->result
->ts
.deferred
)))
16928 gfc_error ("User operator procedure %qs at %L cannot be assumed "
16929 "character length", sym
->name
, &where
);
16933 formal
= gfc_sym_get_dummy_args (sym
);
16934 if (!formal
|| !formal
->sym
)
16936 gfc_error ("User operator procedure %qs at %L must have at least "
16937 "one argument", sym
->name
, &where
);
16941 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16943 gfc_error ("First argument of operator interface at %L must be "
16944 "INTENT(IN)", &where
);
16948 if (formal
->sym
->attr
.optional
)
16950 gfc_error ("First argument of operator interface at %L cannot be "
16951 "optional", &where
);
16955 formal
= formal
->next
;
16956 if (!formal
|| !formal
->sym
)
16959 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16961 gfc_error ("Second argument of operator interface at %L must be "
16962 "INTENT(IN)", &where
);
16966 if (formal
->sym
->attr
.optional
)
16968 gfc_error ("Second argument of operator interface at %L cannot be "
16969 "optional", &where
);
16975 gfc_error ("Operator interface at %L must have, at most, two "
16976 "arguments", &where
);
16984 gfc_resolve_uops (gfc_symtree
*symtree
)
16986 gfc_interface
*itr
;
16988 if (symtree
== NULL
)
16991 gfc_resolve_uops (symtree
->left
);
16992 gfc_resolve_uops (symtree
->right
);
16994 for (itr
= symtree
->n
.uop
->op
; itr
; itr
= itr
->next
)
16995 check_uop_procedure (itr
->sym
, itr
->sym
->declared_at
);
16999 /* Examine all of the expressions associated with a program unit,
17000 assign types to all intermediate expressions, make sure that all
17001 assignments are to compatible types and figure out which names
17002 refer to which functions or subroutines. It doesn't check code
17003 block, which is handled by gfc_resolve_code. */
17006 resolve_types (gfc_namespace
*ns
)
17012 gfc_namespace
* old_ns
= gfc_current_ns
;
17014 if (ns
->types_resolved
)
17017 /* Check that all IMPLICIT types are ok. */
17018 if (!ns
->seen_implicit_none
)
17021 for (letter
= 0; letter
!= GFC_LETTERS
; ++letter
)
17022 if (ns
->set_flag
[letter
]
17023 && !resolve_typespec_used (&ns
->default_type
[letter
],
17024 &ns
->implicit_loc
[letter
], NULL
))
17028 gfc_current_ns
= ns
;
17030 resolve_entries (ns
);
17032 resolve_common_vars (&ns
->blank_common
, false);
17033 resolve_common_blocks (ns
->common_root
);
17035 resolve_contained_functions (ns
);
17037 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
17038 && ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
17039 resolve_formal_arglist (ns
->proc_name
);
17041 gfc_traverse_ns (ns
, resolve_bind_c_derived_types
);
17043 for (cl
= ns
->cl_list
; cl
; cl
= cl
->next
)
17044 resolve_charlen (cl
);
17046 gfc_traverse_ns (ns
, resolve_symbol
);
17048 resolve_fntype (ns
);
17050 for (n
= ns
->contained
; n
; n
= n
->sibling
)
17052 if (gfc_pure (ns
->proc_name
) && !gfc_pure (n
->proc_name
))
17053 gfc_error ("Contained procedure %qs at %L of a PURE procedure must "
17054 "also be PURE", n
->proc_name
->name
,
17055 &n
->proc_name
->declared_at
);
17061 gfc_do_concurrent_flag
= 0;
17062 gfc_check_interfaces (ns
);
17064 gfc_traverse_ns (ns
, resolve_values
);
17066 if (ns
->save_all
|| !flag_automatic
)
17070 for (d
= ns
->data
; d
; d
= d
->next
)
17074 gfc_traverse_ns (ns
, gfc_formalize_init_value
);
17076 gfc_traverse_ns (ns
, gfc_verify_binding_labels
);
17078 for (eq
= ns
->equiv
; eq
; eq
= eq
->next
)
17079 resolve_equivalence (eq
);
17081 /* Warn about unused labels. */
17082 if (warn_unused_label
)
17083 warn_unused_fortran_label (ns
->st_labels
);
17085 gfc_resolve_uops (ns
->uop_root
);
17087 gfc_traverse_ns (ns
, gfc_verify_DTIO_procedures
);
17089 gfc_resolve_omp_declare_simd (ns
);
17091 gfc_resolve_omp_udrs (ns
->omp_udr_root
);
17093 ns
->types_resolved
= 1;
17095 gfc_current_ns
= old_ns
;
17099 /* Call gfc_resolve_code recursively. */
17102 resolve_codes (gfc_namespace
*ns
)
17105 bitmap_obstack old_obstack
;
17107 if (ns
->resolved
== 1)
17110 for (n
= ns
->contained
; n
; n
= n
->sibling
)
17113 gfc_current_ns
= ns
;
17115 /* Don't clear 'cs_base' if this is the namespace of a BLOCK construct. */
17116 if (!(ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_LABEL
))
17119 /* Set to an out of range value. */
17120 current_entry_id
= -1;
17122 old_obstack
= labels_obstack
;
17123 bitmap_obstack_initialize (&labels_obstack
);
17125 gfc_resolve_oacc_declare (ns
);
17126 gfc_resolve_oacc_routines (ns
);
17127 gfc_resolve_omp_local_vars (ns
);
17128 gfc_resolve_code (ns
->code
, ns
);
17130 bitmap_obstack_release (&labels_obstack
);
17131 labels_obstack
= old_obstack
;
17135 /* This function is called after a complete program unit has been compiled.
17136 Its purpose is to examine all of the expressions associated with a program
17137 unit, assign types to all intermediate expressions, make sure that all
17138 assignments are to compatible types and figure out which names refer to
17139 which functions or subroutines. */
17142 gfc_resolve (gfc_namespace
*ns
)
17144 gfc_namespace
*old_ns
;
17145 code_stack
*old_cs_base
;
17146 struct gfc_omp_saved_state old_omp_state
;
17152 old_ns
= gfc_current_ns
;
17153 old_cs_base
= cs_base
;
17155 /* As gfc_resolve can be called during resolution of an OpenMP construct
17156 body, we should clear any state associated to it, so that say NS's
17157 DO loops are not interpreted as OpenMP loops. */
17158 if (!ns
->construct_entities
)
17159 gfc_omp_save_and_clear_state (&old_omp_state
);
17161 resolve_types (ns
);
17162 component_assignment_level
= 0;
17163 resolve_codes (ns
);
17165 gfc_current_ns
= old_ns
;
17166 cs_base
= old_cs_base
;
17169 gfc_run_passes (ns
);
17171 if (!ns
->construct_entities
)
17172 gfc_omp_restore_state (&old_omp_state
);