1 /* Perform type resolution on the various structures.
2 Copyright (C) 2001-2018 Free Software Foundation, Inc.
3 Contributed by Andy Vaught
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
23 #include "coretypes.h"
27 #include "arith.h" /* For gfc_compare_expr(). */
28 #include "dependency.h"
30 #include "target-memory.h" /* for gfc_simplify_transfer */
31 #include "constructor.h"
33 /* Types used in equivalence statements. */
37 SEQ_NONDEFAULT
, SEQ_NUMERIC
, SEQ_CHARACTER
, SEQ_MIXED
40 /* Stack to keep track of the nesting of blocks as we move through the
41 code. See resolve_branch() and gfc_resolve_code(). */
43 typedef struct code_stack
45 struct gfc_code
*head
, *current
;
46 struct code_stack
*prev
;
48 /* This bitmap keeps track of the targets valid for a branch from
49 inside this block except for END {IF|SELECT}s of enclosing
51 bitmap reachable_labels
;
55 static code_stack
*cs_base
= NULL
;
58 /* Nonzero if we're inside a FORALL or DO CONCURRENT block. */
60 static int forall_flag
;
61 int gfc_do_concurrent_flag
;
63 /* True when we are resolving an expression that is an actual argument to
65 static bool actual_arg
= false;
66 /* True when we are resolving an expression that is the first actual argument
68 static bool first_actual_arg
= false;
71 /* Nonzero if we're inside a OpenMP WORKSHARE or PARALLEL WORKSHARE block. */
73 static int omp_workshare_flag
;
75 /* True if we are processing a formal arglist. The corresponding function
76 resets the flag each time that it is read. */
77 static bool formal_arg_flag
= false;
79 /* True if we are resolving a specification expression. */
80 static bool specification_expr
= false;
82 /* The id of the last entry seen. */
83 static int current_entry_id
;
85 /* We use bitmaps to determine if a branch target is valid. */
86 static bitmap_obstack labels_obstack
;
88 /* True when simplifying a EXPR_VARIABLE argument to an inquiry function. */
89 static bool inquiry_argument
= false;
93 gfc_is_formal_arg (void)
95 return formal_arg_flag
;
98 /* Is the symbol host associated? */
100 is_sym_host_assoc (gfc_symbol
*sym
, gfc_namespace
*ns
)
102 for (ns
= ns
->parent
; ns
; ns
= ns
->parent
)
111 /* Ensure a typespec used is valid; for instance, TYPE(t) is invalid if t is
112 an ABSTRACT derived-type. If where is not NULL, an error message with that
113 locus is printed, optionally using name. */
116 resolve_typespec_used (gfc_typespec
* ts
, locus
* where
, const char* name
)
118 if (ts
->type
== BT_DERIVED
&& ts
->u
.derived
->attr
.abstract
)
123 gfc_error ("%qs at %L is of the ABSTRACT type %qs",
124 name
, where
, ts
->u
.derived
->name
);
126 gfc_error ("ABSTRACT type %qs used at %L",
127 ts
->u
.derived
->name
, where
);
138 check_proc_interface (gfc_symbol
*ifc
, locus
*where
)
140 /* Several checks for F08:C1216. */
141 if (ifc
->attr
.procedure
)
143 gfc_error ("Interface %qs at %L is declared "
144 "in a later PROCEDURE statement", ifc
->name
, where
);
149 /* For generic interfaces, check if there is
150 a specific procedure with the same name. */
151 gfc_interface
*gen
= ifc
->generic
;
152 while (gen
&& strcmp (gen
->sym
->name
, ifc
->name
) != 0)
156 gfc_error ("Interface %qs at %L may not be generic",
161 if (ifc
->attr
.proc
== PROC_ST_FUNCTION
)
163 gfc_error ("Interface %qs at %L may not be a statement function",
167 if (gfc_is_intrinsic (ifc
, 0, ifc
->declared_at
)
168 || gfc_is_intrinsic (ifc
, 1, ifc
->declared_at
))
169 ifc
->attr
.intrinsic
= 1;
170 if (ifc
->attr
.intrinsic
&& !gfc_intrinsic_actual_ok (ifc
->name
, 0))
172 gfc_error ("Intrinsic procedure %qs not allowed in "
173 "PROCEDURE statement at %L", ifc
->name
, where
);
176 if (!ifc
->attr
.if_source
&& !ifc
->attr
.intrinsic
&& ifc
->name
[0] != '\0')
178 gfc_error ("Interface %qs at %L must be explicit", ifc
->name
, where
);
185 static void resolve_symbol (gfc_symbol
*sym
);
188 /* Resolve the interface for a PROCEDURE declaration or procedure pointer. */
191 resolve_procedure_interface (gfc_symbol
*sym
)
193 gfc_symbol
*ifc
= sym
->ts
.interface
;
200 gfc_error ("PROCEDURE %qs at %L may not be used as its own interface",
201 sym
->name
, &sym
->declared_at
);
204 if (!check_proc_interface (ifc
, &sym
->declared_at
))
207 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
209 /* Resolve interface and copy attributes. */
210 resolve_symbol (ifc
);
211 if (ifc
->attr
.intrinsic
)
212 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
216 sym
->ts
= ifc
->result
->ts
;
217 sym
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
218 sym
->attr
.pointer
= ifc
->result
->attr
.pointer
;
219 sym
->attr
.dimension
= ifc
->result
->attr
.dimension
;
220 sym
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
221 sym
->as
= gfc_copy_array_spec (ifc
->result
->as
);
227 sym
->attr
.allocatable
= ifc
->attr
.allocatable
;
228 sym
->attr
.pointer
= ifc
->attr
.pointer
;
229 sym
->attr
.dimension
= ifc
->attr
.dimension
;
230 sym
->attr
.class_ok
= ifc
->attr
.class_ok
;
231 sym
->as
= gfc_copy_array_spec (ifc
->as
);
233 sym
->ts
.interface
= ifc
;
234 sym
->attr
.function
= ifc
->attr
.function
;
235 sym
->attr
.subroutine
= ifc
->attr
.subroutine
;
237 sym
->attr
.pure
= ifc
->attr
.pure
;
238 sym
->attr
.elemental
= ifc
->attr
.elemental
;
239 sym
->attr
.contiguous
= ifc
->attr
.contiguous
;
240 sym
->attr
.recursive
= ifc
->attr
.recursive
;
241 sym
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
242 sym
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
243 sym
->attr
.is_bind_c
= ifc
->attr
.is_bind_c
;
244 /* Copy char length. */
245 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
247 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
248 if (sym
->ts
.u
.cl
->length
&& !sym
->ts
.u
.cl
->resolved
249 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
258 /* Resolve types of formal argument lists. These have to be done early so that
259 the formal argument lists of module procedures can be copied to the
260 containing module before the individual procedures are resolved
261 individually. We also resolve argument lists of procedures in interface
262 blocks because they are self-contained scoping units.
264 Since a dummy argument cannot be a non-dummy procedure, the only
265 resort left for untyped names are the IMPLICIT types. */
268 resolve_formal_arglist (gfc_symbol
*proc
)
270 gfc_formal_arglist
*f
;
272 bool saved_specification_expr
;
275 if (proc
->result
!= NULL
)
280 if (gfc_elemental (proc
)
281 || sym
->attr
.pointer
|| sym
->attr
.allocatable
282 || (sym
->as
&& sym
->as
->rank
!= 0))
284 proc
->attr
.always_explicit
= 1;
285 sym
->attr
.always_explicit
= 1;
288 formal_arg_flag
= true;
290 for (f
= proc
->formal
; f
; f
= f
->next
)
298 /* Alternate return placeholder. */
299 if (gfc_elemental (proc
))
300 gfc_error ("Alternate return specifier in elemental subroutine "
301 "%qs at %L is not allowed", proc
->name
,
303 if (proc
->attr
.function
)
304 gfc_error ("Alternate return specifier in function "
305 "%qs at %L is not allowed", proc
->name
,
309 else if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
310 && !resolve_procedure_interface (sym
))
313 if (strcmp (proc
->name
, sym
->name
) == 0)
315 gfc_error ("Self-referential argument "
316 "%qs at %L is not allowed", sym
->name
,
321 if (sym
->attr
.if_source
!= IFSRC_UNKNOWN
)
322 resolve_formal_arglist (sym
);
324 if (sym
->attr
.subroutine
|| sym
->attr
.external
)
326 if (sym
->attr
.flavor
== FL_UNKNOWN
)
327 gfc_add_flavor (&sym
->attr
, FL_PROCEDURE
, sym
->name
, &sym
->declared_at
);
331 if (sym
->ts
.type
== BT_UNKNOWN
&& !proc
->attr
.intrinsic
332 && (!sym
->attr
.function
|| sym
->result
== sym
))
333 gfc_set_default_type (sym
, 1, sym
->ns
);
336 as
= sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
337 ? CLASS_DATA (sym
)->as
: sym
->as
;
339 saved_specification_expr
= specification_expr
;
340 specification_expr
= true;
341 gfc_resolve_array_spec (as
, 0);
342 specification_expr
= saved_specification_expr
;
344 /* We can't tell if an array with dimension (:) is assumed or deferred
345 shape until we know if it has the pointer or allocatable attributes.
347 if (as
&& as
->rank
> 0 && as
->type
== AS_DEFERRED
348 && ((sym
->ts
.type
!= BT_CLASS
349 && !(sym
->attr
.pointer
|| sym
->attr
.allocatable
))
350 || (sym
->ts
.type
== BT_CLASS
351 && !(CLASS_DATA (sym
)->attr
.class_pointer
352 || CLASS_DATA (sym
)->attr
.allocatable
)))
353 && sym
->attr
.flavor
!= FL_PROCEDURE
)
355 as
->type
= AS_ASSUMED_SHAPE
;
356 for (i
= 0; i
< as
->rank
; i
++)
357 as
->lower
[i
] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
360 if ((as
&& as
->rank
> 0 && as
->type
== AS_ASSUMED_SHAPE
)
361 || (as
&& as
->type
== AS_ASSUMED_RANK
)
362 || sym
->attr
.pointer
|| sym
->attr
.allocatable
|| sym
->attr
.target
363 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
364 && (CLASS_DATA (sym
)->attr
.class_pointer
365 || CLASS_DATA (sym
)->attr
.allocatable
366 || CLASS_DATA (sym
)->attr
.target
))
367 || sym
->attr
.optional
)
369 proc
->attr
.always_explicit
= 1;
371 proc
->result
->attr
.always_explicit
= 1;
374 /* If the flavor is unknown at this point, it has to be a variable.
375 A procedure specification would have already set the type. */
377 if (sym
->attr
.flavor
== FL_UNKNOWN
)
378 gfc_add_flavor (&sym
->attr
, FL_VARIABLE
, sym
->name
, &sym
->declared_at
);
382 if (sym
->attr
.flavor
== FL_PROCEDURE
)
387 gfc_error ("Dummy procedure %qs of PURE procedure at %L must "
388 "also be PURE", sym
->name
, &sym
->declared_at
);
392 else if (!sym
->attr
.pointer
)
394 if (proc
->attr
.function
&& sym
->attr
.intent
!= INTENT_IN
)
397 gfc_notify_std (GFC_STD_F2008
, "Argument %qs"
398 " of pure function %qs at %L with VALUE "
399 "attribute but without INTENT(IN)",
400 sym
->name
, proc
->name
, &sym
->declared_at
);
402 gfc_error ("Argument %qs of pure function %qs at %L must "
403 "be INTENT(IN) or VALUE", sym
->name
, proc
->name
,
407 if (proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_UNKNOWN
)
410 gfc_notify_std (GFC_STD_F2008
, "Argument %qs"
411 " of pure subroutine %qs at %L with VALUE "
412 "attribute but without INTENT", sym
->name
,
413 proc
->name
, &sym
->declared_at
);
415 gfc_error ("Argument %qs of pure subroutine %qs at %L "
416 "must have its INTENT specified or have the "
417 "VALUE attribute", sym
->name
, proc
->name
,
423 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.intent
== INTENT_OUT
)
425 gfc_error ("INTENT(OUT) argument %qs of pure procedure %qs at %L"
426 " may not be polymorphic", sym
->name
, proc
->name
,
432 if (proc
->attr
.implicit_pure
)
434 if (sym
->attr
.flavor
== FL_PROCEDURE
)
437 proc
->attr
.implicit_pure
= 0;
439 else if (!sym
->attr
.pointer
)
441 if (proc
->attr
.function
&& sym
->attr
.intent
!= INTENT_IN
443 proc
->attr
.implicit_pure
= 0;
445 if (proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_UNKNOWN
447 proc
->attr
.implicit_pure
= 0;
451 if (gfc_elemental (proc
))
454 if (sym
->attr
.codimension
455 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
456 && CLASS_DATA (sym
)->attr
.codimension
))
458 gfc_error ("Coarray dummy argument %qs at %L to elemental "
459 "procedure", sym
->name
, &sym
->declared_at
);
463 if (sym
->as
|| (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
464 && CLASS_DATA (sym
)->as
))
466 gfc_error ("Argument %qs of elemental procedure at %L must "
467 "be scalar", sym
->name
, &sym
->declared_at
);
471 if (sym
->attr
.allocatable
472 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
473 && CLASS_DATA (sym
)->attr
.allocatable
))
475 gfc_error ("Argument %qs of elemental procedure at %L cannot "
476 "have the ALLOCATABLE attribute", sym
->name
,
481 if (sym
->attr
.pointer
482 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
483 && CLASS_DATA (sym
)->attr
.class_pointer
))
485 gfc_error ("Argument %qs of elemental procedure at %L cannot "
486 "have the POINTER attribute", sym
->name
,
491 if (sym
->attr
.flavor
== FL_PROCEDURE
)
493 gfc_error ("Dummy procedure %qs not allowed in elemental "
494 "procedure %qs at %L", sym
->name
, proc
->name
,
499 /* Fortran 2008 Corrigendum 1, C1290a. */
500 if (sym
->attr
.intent
== INTENT_UNKNOWN
&& !sym
->attr
.value
)
502 gfc_error ("Argument %qs of elemental procedure %qs at %L must "
503 "have its INTENT specified or have the VALUE "
504 "attribute", sym
->name
, proc
->name
,
510 /* Each dummy shall be specified to be scalar. */
511 if (proc
->attr
.proc
== PROC_ST_FUNCTION
)
515 /* F03:C1263 (R1238) The function-name and each dummy-arg-name
516 shall be specified, explicitly or implicitly, to be scalar. */
517 gfc_error ("Argument '%s' of statement function '%s' at %L "
518 "must be scalar", sym
->name
, proc
->name
,
523 if (sym
->ts
.type
== BT_CHARACTER
)
525 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
526 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
528 gfc_error ("Character-valued argument %qs of statement "
529 "function at %L must have constant length",
530 sym
->name
, &sym
->declared_at
);
536 formal_arg_flag
= false;
540 /* Work function called when searching for symbols that have argument lists
541 associated with them. */
544 find_arglists (gfc_symbol
*sym
)
546 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
|| sym
->ns
!= gfc_current_ns
547 || gfc_fl_struct (sym
->attr
.flavor
) || sym
->attr
.intrinsic
)
550 resolve_formal_arglist (sym
);
554 /* Given a namespace, resolve all formal argument lists within the namespace.
558 resolve_formal_arglists (gfc_namespace
*ns
)
563 gfc_traverse_ns (ns
, find_arglists
);
568 resolve_contained_fntype (gfc_symbol
*sym
, gfc_namespace
*ns
)
572 if (sym
&& sym
->attr
.flavor
== FL_PROCEDURE
574 && sym
->ns
->parent
->proc_name
575 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_PROCEDURE
576 && !strcmp (sym
->name
, sym
->ns
->parent
->proc_name
->name
))
577 gfc_error ("Contained procedure %qs at %L has the same name as its "
578 "encompassing procedure", sym
->name
, &sym
->declared_at
);
580 /* If this namespace is not a function or an entry master function,
582 if (! sym
|| !(sym
->attr
.function
|| sym
->attr
.flavor
== FL_VARIABLE
)
583 || sym
->attr
.entry_master
)
586 /* Try to find out of what the return type is. */
587 if (sym
->result
->ts
.type
== BT_UNKNOWN
&& sym
->result
->ts
.interface
== NULL
)
589 t
= gfc_set_default_type (sym
->result
, 0, ns
);
591 if (!t
&& !sym
->result
->attr
.untyped
)
593 if (sym
->result
== sym
)
594 gfc_error ("Contained function %qs at %L has no IMPLICIT type",
595 sym
->name
, &sym
->declared_at
);
596 else if (!sym
->result
->attr
.proc_pointer
)
597 gfc_error ("Result %qs of contained function %qs at %L has "
598 "no IMPLICIT type", sym
->result
->name
, sym
->name
,
599 &sym
->result
->declared_at
);
600 sym
->result
->attr
.untyped
= 1;
604 /* Fortran 95 Draft Standard, page 51, Section 5.1.1.5, on the Character
605 type, lists the only ways a character length value of * can be used:
606 dummy arguments of procedures, named constants, and function results
607 in external functions. Internal function results and results of module
608 procedures are not on this list, ergo, not permitted. */
610 if (sym
->result
->ts
.type
== BT_CHARACTER
)
612 gfc_charlen
*cl
= sym
->result
->ts
.u
.cl
;
613 if ((!cl
|| !cl
->length
) && !sym
->result
->ts
.deferred
)
615 /* See if this is a module-procedure and adapt error message
618 gcc_assert (ns
->parent
&& ns
->parent
->proc_name
);
619 module_proc
= (ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
);
621 gfc_error (module_proc
622 ? G_("Character-valued module procedure %qs at %L"
623 " must not be assumed length")
624 : G_("Character-valued internal function %qs at %L"
625 " must not be assumed length"),
626 sym
->name
, &sym
->declared_at
);
632 /* Add NEW_ARGS to the formal argument list of PROC, taking care not to
633 introduce duplicates. */
636 merge_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
638 gfc_formal_arglist
*f
, *new_arglist
;
641 for (; new_args
!= NULL
; new_args
= new_args
->next
)
643 new_sym
= new_args
->sym
;
644 /* See if this arg is already in the formal argument list. */
645 for (f
= proc
->formal
; f
; f
= f
->next
)
647 if (new_sym
== f
->sym
)
654 /* Add a new argument. Argument order is not important. */
655 new_arglist
= gfc_get_formal_arglist ();
656 new_arglist
->sym
= new_sym
;
657 new_arglist
->next
= proc
->formal
;
658 proc
->formal
= new_arglist
;
663 /* Flag the arguments that are not present in all entries. */
666 check_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
668 gfc_formal_arglist
*f
, *head
;
671 for (f
= proc
->formal
; f
; f
= f
->next
)
676 for (new_args
= head
; new_args
; new_args
= new_args
->next
)
678 if (new_args
->sym
== f
->sym
)
685 f
->sym
->attr
.not_always_present
= 1;
690 /* Resolve alternate entry points. If a symbol has multiple entry points we
691 create a new master symbol for the main routine, and turn the existing
692 symbol into an entry point. */
695 resolve_entries (gfc_namespace
*ns
)
697 gfc_namespace
*old_ns
;
701 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
702 static int master_count
= 0;
704 if (ns
->proc_name
== NULL
)
707 /* No need to do anything if this procedure doesn't have alternate entry
712 /* We may already have resolved alternate entry points. */
713 if (ns
->proc_name
->attr
.entry_master
)
716 /* If this isn't a procedure something has gone horribly wrong. */
717 gcc_assert (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
);
719 /* Remember the current namespace. */
720 old_ns
= gfc_current_ns
;
724 /* Add the main entry point to the list of entry points. */
725 el
= gfc_get_entry_list ();
726 el
->sym
= ns
->proc_name
;
728 el
->next
= ns
->entries
;
730 ns
->proc_name
->attr
.entry
= 1;
732 /* If it is a module function, it needs to be in the right namespace
733 so that gfc_get_fake_result_decl can gather up the results. The
734 need for this arose in get_proc_name, where these beasts were
735 left in their own namespace, to keep prior references linked to
736 the entry declaration.*/
737 if (ns
->proc_name
->attr
.function
738 && ns
->parent
&& ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
741 /* Do the same for entries where the master is not a module
742 procedure. These are retained in the module namespace because
743 of the module procedure declaration. */
744 for (el
= el
->next
; el
; el
= el
->next
)
745 if (el
->sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
746 && el
->sym
->attr
.mod_proc
)
750 /* Add an entry statement for it. */
751 c
= gfc_get_code (EXEC_ENTRY
);
756 /* Create a new symbol for the master function. */
757 /* Give the internal function a unique name (within this file).
758 Also include the function name so the user has some hope of figuring
759 out what is going on. */
760 snprintf (name
, GFC_MAX_SYMBOL_LEN
, "master.%d.%s",
761 master_count
++, ns
->proc_name
->name
);
762 gfc_get_ha_symbol (name
, &proc
);
763 gcc_assert (proc
!= NULL
);
765 gfc_add_procedure (&proc
->attr
, PROC_INTERNAL
, proc
->name
, NULL
);
766 if (ns
->proc_name
->attr
.subroutine
)
767 gfc_add_subroutine (&proc
->attr
, proc
->name
, NULL
);
771 gfc_typespec
*ts
, *fts
;
772 gfc_array_spec
*as
, *fas
;
773 gfc_add_function (&proc
->attr
, proc
->name
, NULL
);
775 fas
= ns
->entries
->sym
->as
;
776 fas
= fas
? fas
: ns
->entries
->sym
->result
->as
;
777 fts
= &ns
->entries
->sym
->result
->ts
;
778 if (fts
->type
== BT_UNKNOWN
)
779 fts
= gfc_get_default_type (ns
->entries
->sym
->result
->name
, NULL
);
780 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
782 ts
= &el
->sym
->result
->ts
;
784 as
= as
? as
: el
->sym
->result
->as
;
785 if (ts
->type
== BT_UNKNOWN
)
786 ts
= gfc_get_default_type (el
->sym
->result
->name
, NULL
);
788 if (! gfc_compare_types (ts
, fts
)
789 || (el
->sym
->result
->attr
.dimension
790 != ns
->entries
->sym
->result
->attr
.dimension
)
791 || (el
->sym
->result
->attr
.pointer
792 != ns
->entries
->sym
->result
->attr
.pointer
))
794 else if (as
&& fas
&& ns
->entries
->sym
->result
!= el
->sym
->result
795 && gfc_compare_array_spec (as
, fas
) == 0)
796 gfc_error ("Function %s at %L has entries with mismatched "
797 "array specifications", ns
->entries
->sym
->name
,
798 &ns
->entries
->sym
->declared_at
);
799 /* The characteristics need to match and thus both need to have
800 the same string length, i.e. both len=*, or both len=4.
801 Having both len=<variable> is also possible, but difficult to
802 check at compile time. */
803 else if (ts
->type
== BT_CHARACTER
&& ts
->u
.cl
&& fts
->u
.cl
804 && (((ts
->u
.cl
->length
&& !fts
->u
.cl
->length
)
805 ||(!ts
->u
.cl
->length
&& fts
->u
.cl
->length
))
807 && ts
->u
.cl
->length
->expr_type
808 != fts
->u
.cl
->length
->expr_type
)
810 && ts
->u
.cl
->length
->expr_type
== EXPR_CONSTANT
811 && mpz_cmp (ts
->u
.cl
->length
->value
.integer
,
812 fts
->u
.cl
->length
->value
.integer
) != 0)))
813 gfc_notify_std (GFC_STD_GNU
, "Function %s at %L with "
814 "entries returning variables of different "
815 "string lengths", ns
->entries
->sym
->name
,
816 &ns
->entries
->sym
->declared_at
);
821 sym
= ns
->entries
->sym
->result
;
822 /* All result types the same. */
824 if (sym
->attr
.dimension
)
825 gfc_set_array_spec (proc
, gfc_copy_array_spec (sym
->as
), NULL
);
826 if (sym
->attr
.pointer
)
827 gfc_add_pointer (&proc
->attr
, NULL
);
831 /* Otherwise the result will be passed through a union by
833 proc
->attr
.mixed_entry_master
= 1;
834 for (el
= ns
->entries
; el
; el
= el
->next
)
836 sym
= el
->sym
->result
;
837 if (sym
->attr
.dimension
)
839 if (el
== ns
->entries
)
840 gfc_error ("FUNCTION result %s can't be an array in "
841 "FUNCTION %s at %L", sym
->name
,
842 ns
->entries
->sym
->name
, &sym
->declared_at
);
844 gfc_error ("ENTRY result %s can't be an array in "
845 "FUNCTION %s at %L", sym
->name
,
846 ns
->entries
->sym
->name
, &sym
->declared_at
);
848 else if (sym
->attr
.pointer
)
850 if (el
== ns
->entries
)
851 gfc_error ("FUNCTION result %s can't be a POINTER in "
852 "FUNCTION %s at %L", sym
->name
,
853 ns
->entries
->sym
->name
, &sym
->declared_at
);
855 gfc_error ("ENTRY result %s can't be a POINTER in "
856 "FUNCTION %s at %L", sym
->name
,
857 ns
->entries
->sym
->name
, &sym
->declared_at
);
862 if (ts
->type
== BT_UNKNOWN
)
863 ts
= gfc_get_default_type (sym
->name
, NULL
);
867 if (ts
->kind
== gfc_default_integer_kind
)
871 if (ts
->kind
== gfc_default_real_kind
872 || ts
->kind
== gfc_default_double_kind
)
876 if (ts
->kind
== gfc_default_complex_kind
)
880 if (ts
->kind
== gfc_default_logical_kind
)
884 /* We will issue error elsewhere. */
892 if (el
== ns
->entries
)
893 gfc_error ("FUNCTION result %s can't be of type %s "
894 "in FUNCTION %s at %L", sym
->name
,
895 gfc_typename (ts
), ns
->entries
->sym
->name
,
898 gfc_error ("ENTRY result %s can't be of type %s "
899 "in FUNCTION %s at %L", sym
->name
,
900 gfc_typename (ts
), ns
->entries
->sym
->name
,
907 proc
->attr
.access
= ACCESS_PRIVATE
;
908 proc
->attr
.entry_master
= 1;
910 /* Merge all the entry point arguments. */
911 for (el
= ns
->entries
; el
; el
= el
->next
)
912 merge_argument_lists (proc
, el
->sym
->formal
);
914 /* Check the master formal arguments for any that are not
915 present in all entry points. */
916 for (el
= ns
->entries
; el
; el
= el
->next
)
917 check_argument_lists (proc
, el
->sym
->formal
);
919 /* Use the master function for the function body. */
920 ns
->proc_name
= proc
;
922 /* Finalize the new symbols. */
923 gfc_commit_symbols ();
925 /* Restore the original namespace. */
926 gfc_current_ns
= old_ns
;
930 /* Resolve common variables. */
932 resolve_common_vars (gfc_common_head
*common_block
, bool named_common
)
934 gfc_symbol
*csym
= common_block
->head
;
936 for (; csym
; csym
= csym
->common_next
)
938 /* gfc_add_in_common may have been called before, but the reported errors
939 have been ignored to continue parsing.
940 We do the checks again here. */
941 if (!csym
->attr
.use_assoc
)
942 gfc_add_in_common (&csym
->attr
, csym
->name
, &common_block
->where
);
944 if (csym
->value
|| csym
->attr
.data
)
946 if (!csym
->ns
->is_block_data
)
947 gfc_notify_std (GFC_STD_GNU
, "Variable %qs at %L is in COMMON "
948 "but only in BLOCK DATA initialization is "
949 "allowed", csym
->name
, &csym
->declared_at
);
950 else if (!named_common
)
951 gfc_notify_std (GFC_STD_GNU
, "Initialized variable %qs at %L is "
952 "in a blank COMMON but initialization is only "
953 "allowed in named common blocks", csym
->name
,
957 if (UNLIMITED_POLY (csym
))
958 gfc_error_now ("%qs in cannot appear in COMMON at %L "
959 "[F2008:C5100]", csym
->name
, &csym
->declared_at
);
961 if (csym
->ts
.type
!= BT_DERIVED
)
964 if (!(csym
->ts
.u
.derived
->attr
.sequence
965 || csym
->ts
.u
.derived
->attr
.is_bind_c
))
966 gfc_error_now ("Derived type variable %qs in COMMON at %L "
967 "has neither the SEQUENCE nor the BIND(C) "
968 "attribute", csym
->name
, &csym
->declared_at
);
969 if (csym
->ts
.u
.derived
->attr
.alloc_comp
)
970 gfc_error_now ("Derived type variable %qs in COMMON at %L "
971 "has an ultimate component that is "
972 "allocatable", csym
->name
, &csym
->declared_at
);
973 if (gfc_has_default_initializer (csym
->ts
.u
.derived
))
974 gfc_error_now ("Derived type variable %qs in COMMON at %L "
975 "may not have default initializer", csym
->name
,
978 if (csym
->attr
.flavor
== FL_UNKNOWN
&& !csym
->attr
.proc_pointer
)
979 gfc_add_flavor (&csym
->attr
, FL_VARIABLE
, csym
->name
, &csym
->declared_at
);
983 /* Resolve common blocks. */
985 resolve_common_blocks (gfc_symtree
*common_root
)
990 if (common_root
== NULL
)
993 if (common_root
->left
)
994 resolve_common_blocks (common_root
->left
);
995 if (common_root
->right
)
996 resolve_common_blocks (common_root
->right
);
998 resolve_common_vars (common_root
->n
.common
, true);
1000 /* The common name is a global name - in Fortran 2003 also if it has a
1001 C binding name, since Fortran 2008 only the C binding name is a global
1003 if (!common_root
->n
.common
->binding_label
1004 || gfc_notification_std (GFC_STD_F2008
))
1006 gsym
= gfc_find_gsymbol (gfc_gsym_root
,
1007 common_root
->n
.common
->name
);
1009 if (gsym
&& gfc_notification_std (GFC_STD_F2008
)
1010 && gsym
->type
== GSYM_COMMON
1011 && ((common_root
->n
.common
->binding_label
1012 && (!gsym
->binding_label
1013 || strcmp (common_root
->n
.common
->binding_label
,
1014 gsym
->binding_label
) != 0))
1015 || (!common_root
->n
.common
->binding_label
1016 && gsym
->binding_label
)))
1018 gfc_error ("In Fortran 2003 COMMON %qs block at %L is a global "
1019 "identifier and must thus have the same binding name "
1020 "as the same-named COMMON block at %L: %s vs %s",
1021 common_root
->n
.common
->name
, &common_root
->n
.common
->where
,
1023 common_root
->n
.common
->binding_label
1024 ? common_root
->n
.common
->binding_label
: "(blank)",
1025 gsym
->binding_label
? gsym
->binding_label
: "(blank)");
1029 if (gsym
&& gsym
->type
!= GSYM_COMMON
1030 && !common_root
->n
.common
->binding_label
)
1032 gfc_error ("COMMON block %qs at %L uses the same global identifier "
1034 common_root
->n
.common
->name
, &common_root
->n
.common
->where
,
1038 if (gsym
&& gsym
->type
!= GSYM_COMMON
)
1040 gfc_error ("Fortran 2008: COMMON block %qs with binding label at "
1041 "%L sharing the identifier with global non-COMMON-block "
1042 "entity at %L", common_root
->n
.common
->name
,
1043 &common_root
->n
.common
->where
, &gsym
->where
);
1048 gsym
= gfc_get_gsymbol (common_root
->n
.common
->name
);
1049 gsym
->type
= GSYM_COMMON
;
1050 gsym
->where
= common_root
->n
.common
->where
;
1056 if (common_root
->n
.common
->binding_label
)
1058 gsym
= gfc_find_gsymbol (gfc_gsym_root
,
1059 common_root
->n
.common
->binding_label
);
1060 if (gsym
&& gsym
->type
!= GSYM_COMMON
)
1062 gfc_error ("COMMON block at %L with binding label %qs uses the same "
1063 "global identifier as entity at %L",
1064 &common_root
->n
.common
->where
,
1065 common_root
->n
.common
->binding_label
, &gsym
->where
);
1070 gsym
= gfc_get_gsymbol (common_root
->n
.common
->binding_label
);
1071 gsym
->type
= GSYM_COMMON
;
1072 gsym
->where
= common_root
->n
.common
->where
;
1078 gfc_find_symbol (common_root
->name
, gfc_current_ns
, 0, &sym
);
1082 if (sym
->attr
.flavor
== FL_PARAMETER
)
1083 gfc_error ("COMMON block %qs at %L is used as PARAMETER at %L",
1084 sym
->name
, &common_root
->n
.common
->where
, &sym
->declared_at
);
1086 if (sym
->attr
.external
)
1087 gfc_error ("COMMON block %qs at %L can not have the EXTERNAL attribute",
1088 sym
->name
, &common_root
->n
.common
->where
);
1090 if (sym
->attr
.intrinsic
)
1091 gfc_error ("COMMON block %qs at %L is also an intrinsic procedure",
1092 sym
->name
, &common_root
->n
.common
->where
);
1093 else if (sym
->attr
.result
1094 || gfc_is_function_return_value (sym
, gfc_current_ns
))
1095 gfc_notify_std (GFC_STD_F2003
, "COMMON block %qs at %L "
1096 "that is also a function result", sym
->name
,
1097 &common_root
->n
.common
->where
);
1098 else if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.proc
!= PROC_INTERNAL
1099 && sym
->attr
.proc
!= PROC_ST_FUNCTION
)
1100 gfc_notify_std (GFC_STD_F2003
, "COMMON block %qs at %L "
1101 "that is also a global procedure", sym
->name
,
1102 &common_root
->n
.common
->where
);
1106 /* Resolve contained function types. Because contained functions can call one
1107 another, they have to be worked out before any of the contained procedures
1110 The good news is that if a function doesn't already have a type, the only
1111 way it can get one is through an IMPLICIT type or a RESULT variable, because
1112 by definition contained functions are contained namespace they're contained
1113 in, not in a sibling or parent namespace. */
1116 resolve_contained_functions (gfc_namespace
*ns
)
1118 gfc_namespace
*child
;
1121 resolve_formal_arglists (ns
);
1123 for (child
= ns
->contained
; child
; child
= child
->sibling
)
1125 /* Resolve alternate entry points first. */
1126 resolve_entries (child
);
1128 /* Then check function return types. */
1129 resolve_contained_fntype (child
->proc_name
, child
);
1130 for (el
= child
->entries
; el
; el
= el
->next
)
1131 resolve_contained_fntype (el
->sym
, child
);
1137 /* A Parameterized Derived Type constructor must contain values for
1138 the PDT KIND parameters or they must have a default initializer.
1139 Go through the constructor picking out the KIND expressions,
1140 storing them in 'param_list' and then call gfc_get_pdt_instance
1141 to obtain the PDT instance. */
1143 static gfc_actual_arglist
*param_list
, *param_tail
, *param
;
1146 get_pdt_spec_expr (gfc_component
*c
, gfc_expr
*expr
)
1148 param
= gfc_get_actual_arglist ();
1150 param_list
= param_tail
= param
;
1153 param_tail
->next
= param
;
1154 param_tail
= param_tail
->next
;
1157 param_tail
->name
= c
->name
;
1159 param_tail
->expr
= gfc_copy_expr (expr
);
1160 else if (c
->initializer
)
1161 param_tail
->expr
= gfc_copy_expr (c
->initializer
);
1164 param_tail
->spec_type
= SPEC_ASSUMED
;
1165 if (c
->attr
.pdt_kind
)
1167 gfc_error ("The KIND parameter %qs in the PDT constructor "
1168 "at %C has no value", param
->name
);
1177 get_pdt_constructor (gfc_expr
*expr
, gfc_constructor
**constr
,
1178 gfc_symbol
*derived
)
1180 gfc_constructor
*cons
= NULL
;
1181 gfc_component
*comp
;
1184 if (expr
&& expr
->expr_type
== EXPR_STRUCTURE
)
1185 cons
= gfc_constructor_first (expr
->value
.constructor
);
1190 comp
= derived
->components
;
1192 for (; comp
&& cons
; comp
= comp
->next
, cons
= gfc_constructor_next (cons
))
1195 && cons
->expr
->expr_type
== EXPR_STRUCTURE
1196 && comp
->ts
.type
== BT_DERIVED
)
1198 t
= get_pdt_constructor (cons
->expr
, NULL
, comp
->ts
.u
.derived
);
1202 else if (comp
->ts
.type
== BT_DERIVED
)
1204 t
= get_pdt_constructor (NULL
, &cons
, comp
->ts
.u
.derived
);
1208 else if ((comp
->attr
.pdt_kind
|| comp
->attr
.pdt_len
)
1209 && derived
->attr
.pdt_template
)
1211 t
= get_pdt_spec_expr (comp
, cons
->expr
);
1220 static bool resolve_fl_derived0 (gfc_symbol
*sym
);
1221 static bool resolve_fl_struct (gfc_symbol
*sym
);
1224 /* Resolve all of the elements of a structure constructor and make sure that
1225 the types are correct. The 'init' flag indicates that the given
1226 constructor is an initializer. */
1229 resolve_structure_cons (gfc_expr
*expr
, int init
)
1231 gfc_constructor
*cons
;
1232 gfc_component
*comp
;
1238 if (expr
->ts
.type
== BT_DERIVED
|| expr
->ts
.type
== BT_UNION
)
1240 if (expr
->ts
.u
.derived
->attr
.flavor
== FL_DERIVED
)
1241 resolve_fl_derived0 (expr
->ts
.u
.derived
);
1243 resolve_fl_struct (expr
->ts
.u
.derived
);
1245 /* If this is a Parameterized Derived Type template, find the
1246 instance corresponding to the PDT kind parameters. */
1247 if (expr
->ts
.u
.derived
->attr
.pdt_template
)
1250 t
= get_pdt_constructor (expr
, NULL
, expr
->ts
.u
.derived
);
1253 gfc_get_pdt_instance (param_list
, &expr
->ts
.u
.derived
, NULL
);
1255 expr
->param_list
= gfc_copy_actual_arglist (param_list
);
1258 gfc_free_actual_arglist (param_list
);
1260 if (!expr
->ts
.u
.derived
->attr
.pdt_type
)
1265 cons
= gfc_constructor_first (expr
->value
.constructor
);
1267 /* A constructor may have references if it is the result of substituting a
1268 parameter variable. In this case we just pull out the component we
1271 comp
= expr
->ref
->u
.c
.sym
->components
;
1273 comp
= expr
->ts
.u
.derived
->components
;
1275 for (; comp
&& cons
; comp
= comp
->next
, cons
= gfc_constructor_next (cons
))
1282 /* Unions use an EXPR_NULL contrived expression to tell the translation
1283 phase to generate an initializer of the appropriate length.
1285 if (cons
->expr
->ts
.type
== BT_UNION
&& cons
->expr
->expr_type
== EXPR_NULL
)
1288 if (!gfc_resolve_expr (cons
->expr
))
1294 rank
= comp
->as
? comp
->as
->rank
: 0;
1295 if (comp
->ts
.type
== BT_CLASS
1296 && !comp
->ts
.u
.derived
->attr
.unlimited_polymorphic
1297 && CLASS_DATA (comp
)->as
)
1298 rank
= CLASS_DATA (comp
)->as
->rank
;
1300 if (cons
->expr
->expr_type
!= EXPR_NULL
&& rank
!= cons
->expr
->rank
1301 && (comp
->attr
.allocatable
|| cons
->expr
->rank
))
1303 gfc_error ("The rank of the element in the structure "
1304 "constructor at %L does not match that of the "
1305 "component (%d/%d)", &cons
->expr
->where
,
1306 cons
->expr
->rank
, rank
);
1310 /* If we don't have the right type, try to convert it. */
1312 if (!comp
->attr
.proc_pointer
&&
1313 !gfc_compare_types (&cons
->expr
->ts
, &comp
->ts
))
1315 if (strcmp (comp
->name
, "_extends") == 0)
1317 /* Can afford to be brutal with the _extends initializer.
1318 The derived type can get lost because it is PRIVATE
1319 but it is not usage constrained by the standard. */
1320 cons
->expr
->ts
= comp
->ts
;
1322 else if (comp
->attr
.pointer
&& cons
->expr
->ts
.type
!= BT_UNKNOWN
)
1324 gfc_error ("The element in the structure constructor at %L, "
1325 "for pointer component %qs, is %s but should be %s",
1326 &cons
->expr
->where
, comp
->name
,
1327 gfc_basic_typename (cons
->expr
->ts
.type
),
1328 gfc_basic_typename (comp
->ts
.type
));
1333 bool t2
= gfc_convert_type (cons
->expr
, &comp
->ts
, 1);
1339 /* For strings, the length of the constructor should be the same as
1340 the one of the structure, ensure this if the lengths are known at
1341 compile time and when we are dealing with PARAMETER or structure
1343 if (cons
->expr
->ts
.type
== BT_CHARACTER
&& comp
->ts
.u
.cl
1344 && comp
->ts
.u
.cl
->length
1345 && comp
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
1346 && cons
->expr
->ts
.u
.cl
&& cons
->expr
->ts
.u
.cl
->length
1347 && cons
->expr
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
1348 && cons
->expr
->rank
!= 0
1349 && mpz_cmp (cons
->expr
->ts
.u
.cl
->length
->value
.integer
,
1350 comp
->ts
.u
.cl
->length
->value
.integer
) != 0)
1352 if (cons
->expr
->expr_type
== EXPR_VARIABLE
1353 && cons
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
)
1355 /* Wrap the parameter in an array constructor (EXPR_ARRAY)
1356 to make use of the gfc_resolve_character_array_constructor
1357 machinery. The expression is later simplified away to
1358 an array of string literals. */
1359 gfc_expr
*para
= cons
->expr
;
1360 cons
->expr
= gfc_get_expr ();
1361 cons
->expr
->ts
= para
->ts
;
1362 cons
->expr
->where
= para
->where
;
1363 cons
->expr
->expr_type
= EXPR_ARRAY
;
1364 cons
->expr
->rank
= para
->rank
;
1365 cons
->expr
->shape
= gfc_copy_shape (para
->shape
, para
->rank
);
1366 gfc_constructor_append_expr (&cons
->expr
->value
.constructor
,
1367 para
, &cons
->expr
->where
);
1370 if (cons
->expr
->expr_type
== EXPR_ARRAY
)
1372 /* Rely on the cleanup of the namespace to deal correctly with
1373 the old charlen. (There was a block here that attempted to
1374 remove the charlen but broke the chain in so doing.) */
1375 cons
->expr
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1376 cons
->expr
->ts
.u
.cl
->length_from_typespec
= true;
1377 cons
->expr
->ts
.u
.cl
->length
= gfc_copy_expr (comp
->ts
.u
.cl
->length
);
1378 gfc_resolve_character_array_constructor (cons
->expr
);
1382 if (cons
->expr
->expr_type
== EXPR_NULL
1383 && !(comp
->attr
.pointer
|| comp
->attr
.allocatable
1384 || comp
->attr
.proc_pointer
|| comp
->ts
.f90_type
== BT_VOID
1385 || (comp
->ts
.type
== BT_CLASS
1386 && (CLASS_DATA (comp
)->attr
.class_pointer
1387 || CLASS_DATA (comp
)->attr
.allocatable
))))
1390 gfc_error ("The NULL in the structure constructor at %L is "
1391 "being applied to component %qs, which is neither "
1392 "a POINTER nor ALLOCATABLE", &cons
->expr
->where
,
1396 if (comp
->attr
.proc_pointer
&& comp
->ts
.interface
)
1398 /* Check procedure pointer interface. */
1399 gfc_symbol
*s2
= NULL
;
1404 c2
= gfc_get_proc_ptr_comp (cons
->expr
);
1407 s2
= c2
->ts
.interface
;
1410 else if (cons
->expr
->expr_type
== EXPR_FUNCTION
)
1412 s2
= cons
->expr
->symtree
->n
.sym
->result
;
1413 name
= cons
->expr
->symtree
->n
.sym
->result
->name
;
1415 else if (cons
->expr
->expr_type
!= EXPR_NULL
)
1417 s2
= cons
->expr
->symtree
->n
.sym
;
1418 name
= cons
->expr
->symtree
->n
.sym
->name
;
1421 if (s2
&& !gfc_compare_interfaces (comp
->ts
.interface
, s2
, name
, 0, 1,
1422 err
, sizeof (err
), NULL
, NULL
))
1424 gfc_error_opt (OPT_Wargument_mismatch
,
1425 "Interface mismatch for procedure-pointer "
1426 "component %qs in structure constructor at %L:"
1427 " %s", comp
->name
, &cons
->expr
->where
, err
);
1432 if (!comp
->attr
.pointer
|| comp
->attr
.proc_pointer
1433 || cons
->expr
->expr_type
== EXPR_NULL
)
1436 a
= gfc_expr_attr (cons
->expr
);
1438 if (!a
.pointer
&& !a
.target
)
1441 gfc_error ("The element in the structure constructor at %L, "
1442 "for pointer component %qs should be a POINTER or "
1443 "a TARGET", &cons
->expr
->where
, comp
->name
);
1448 /* F08:C461. Additional checks for pointer initialization. */
1452 gfc_error ("Pointer initialization target at %L "
1453 "must not be ALLOCATABLE", &cons
->expr
->where
);
1458 gfc_error ("Pointer initialization target at %L "
1459 "must have the SAVE attribute", &cons
->expr
->where
);
1463 /* F2003, C1272 (3). */
1464 bool impure
= cons
->expr
->expr_type
== EXPR_VARIABLE
1465 && (gfc_impure_variable (cons
->expr
->symtree
->n
.sym
)
1466 || gfc_is_coindexed (cons
->expr
));
1467 if (impure
&& gfc_pure (NULL
))
1470 gfc_error ("Invalid expression in the structure constructor for "
1471 "pointer component %qs at %L in PURE procedure",
1472 comp
->name
, &cons
->expr
->where
);
1476 gfc_unset_implicit_pure (NULL
);
1483 /****************** Expression name resolution ******************/
1485 /* Returns 0 if a symbol was not declared with a type or
1486 attribute declaration statement, nonzero otherwise. */
1489 was_declared (gfc_symbol
*sym
)
1495 if (!a
.implicit_type
&& sym
->ts
.type
!= BT_UNKNOWN
)
1498 if (a
.allocatable
|| a
.dimension
|| a
.dummy
|| a
.external
|| a
.intrinsic
1499 || a
.optional
|| a
.pointer
|| a
.save
|| a
.target
|| a
.volatile_
1500 || a
.value
|| a
.access
!= ACCESS_UNKNOWN
|| a
.intent
!= INTENT_UNKNOWN
1501 || a
.asynchronous
|| a
.codimension
)
1508 /* Determine if a symbol is generic or not. */
1511 generic_sym (gfc_symbol
*sym
)
1515 if (sym
->attr
.generic
||
1516 (sym
->attr
.intrinsic
&& gfc_generic_intrinsic (sym
->name
)))
1519 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1522 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1529 return generic_sym (s
);
1536 /* Determine if a symbol is specific or not. */
1539 specific_sym (gfc_symbol
*sym
)
1543 if (sym
->attr
.if_source
== IFSRC_IFBODY
1544 || sym
->attr
.proc
== PROC_MODULE
1545 || sym
->attr
.proc
== PROC_INTERNAL
1546 || sym
->attr
.proc
== PROC_ST_FUNCTION
1547 || (sym
->attr
.intrinsic
&& gfc_specific_intrinsic (sym
->name
))
1548 || sym
->attr
.external
)
1551 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1554 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1556 return (s
== NULL
) ? 0 : specific_sym (s
);
1560 /* Figure out if the procedure is specific, generic or unknown. */
1563 { PTYPE_GENERIC
= 1, PTYPE_SPECIFIC
, PTYPE_UNKNOWN
};
1566 procedure_kind (gfc_symbol
*sym
)
1568 if (generic_sym (sym
))
1569 return PTYPE_GENERIC
;
1571 if (specific_sym (sym
))
1572 return PTYPE_SPECIFIC
;
1574 return PTYPE_UNKNOWN
;
1577 /* Check references to assumed size arrays. The flag need_full_assumed_size
1578 is nonzero when matching actual arguments. */
1580 static int need_full_assumed_size
= 0;
1583 check_assumed_size_reference (gfc_symbol
*sym
, gfc_expr
*e
)
1585 if (need_full_assumed_size
|| !(sym
->as
&& sym
->as
->type
== AS_ASSUMED_SIZE
))
1588 /* FIXME: The comparison "e->ref->u.ar.type == AR_FULL" is wrong.
1589 What should it be? */
1590 if (e
->ref
&& (e
->ref
->u
.ar
.end
[e
->ref
->u
.ar
.as
->rank
- 1] == NULL
)
1591 && (e
->ref
->u
.ar
.as
->type
== AS_ASSUMED_SIZE
)
1592 && (e
->ref
->u
.ar
.type
== AR_FULL
))
1594 gfc_error ("The upper bound in the last dimension must "
1595 "appear in the reference to the assumed size "
1596 "array %qs at %L", sym
->name
, &e
->where
);
1603 /* Look for bad assumed size array references in argument expressions
1604 of elemental and array valued intrinsic procedures. Since this is
1605 called from procedure resolution functions, it only recurses at
1609 resolve_assumed_size_actual (gfc_expr
*e
)
1614 switch (e
->expr_type
)
1617 if (e
->symtree
&& check_assumed_size_reference (e
->symtree
->n
.sym
, e
))
1622 if (resolve_assumed_size_actual (e
->value
.op
.op1
)
1623 || resolve_assumed_size_actual (e
->value
.op
.op2
))
1634 /* Check a generic procedure, passed as an actual argument, to see if
1635 there is a matching specific name. If none, it is an error, and if
1636 more than one, the reference is ambiguous. */
1638 count_specific_procs (gfc_expr
*e
)
1645 sym
= e
->symtree
->n
.sym
;
1647 for (p
= sym
->generic
; p
; p
= p
->next
)
1648 if (strcmp (sym
->name
, p
->sym
->name
) == 0)
1650 e
->symtree
= gfc_find_symtree (p
->sym
->ns
->sym_root
,
1656 gfc_error ("%qs at %L is ambiguous", e
->symtree
->n
.sym
->name
,
1660 gfc_error ("GENERIC procedure %qs is not allowed as an actual "
1661 "argument at %L", sym
->name
, &e
->where
);
1667 /* See if a call to sym could possibly be a not allowed RECURSION because of
1668 a missing RECURSIVE declaration. This means that either sym is the current
1669 context itself, or sym is the parent of a contained procedure calling its
1670 non-RECURSIVE containing procedure.
1671 This also works if sym is an ENTRY. */
1674 is_illegal_recursion (gfc_symbol
* sym
, gfc_namespace
* context
)
1676 gfc_symbol
* proc_sym
;
1677 gfc_symbol
* context_proc
;
1678 gfc_namespace
* real_context
;
1680 if (sym
->attr
.flavor
== FL_PROGRAM
1681 || gfc_fl_struct (sym
->attr
.flavor
))
1684 gcc_assert (sym
->attr
.flavor
== FL_PROCEDURE
);
1686 /* If we've got an ENTRY, find real procedure. */
1687 if (sym
->attr
.entry
&& sym
->ns
->entries
)
1688 proc_sym
= sym
->ns
->entries
->sym
;
1692 /* If sym is RECURSIVE, all is well of course. */
1693 if (proc_sym
->attr
.recursive
|| flag_recursive
)
1696 /* Find the context procedure's "real" symbol if it has entries.
1697 We look for a procedure symbol, so recurse on the parents if we don't
1698 find one (like in case of a BLOCK construct). */
1699 for (real_context
= context
; ; real_context
= real_context
->parent
)
1701 /* We should find something, eventually! */
1702 gcc_assert (real_context
);
1704 context_proc
= (real_context
->entries
? real_context
->entries
->sym
1705 : real_context
->proc_name
);
1707 /* In some special cases, there may not be a proc_name, like for this
1709 real(bad_kind()) function foo () ...
1710 when checking the call to bad_kind ().
1711 In these cases, we simply return here and assume that the
1716 if (context_proc
->attr
.flavor
!= FL_LABEL
)
1720 /* A call from sym's body to itself is recursion, of course. */
1721 if (context_proc
== proc_sym
)
1724 /* The same is true if context is a contained procedure and sym the
1726 if (context_proc
->attr
.contained
)
1728 gfc_symbol
* parent_proc
;
1730 gcc_assert (context
->parent
);
1731 parent_proc
= (context
->parent
->entries
? context
->parent
->entries
->sym
1732 : context
->parent
->proc_name
);
1734 if (parent_proc
== proc_sym
)
1742 /* Resolve an intrinsic procedure: Set its function/subroutine attribute,
1743 its typespec and formal argument list. */
1746 gfc_resolve_intrinsic (gfc_symbol
*sym
, locus
*loc
)
1748 gfc_intrinsic_sym
* isym
= NULL
;
1754 /* Already resolved. */
1755 if (sym
->from_intmod
&& sym
->ts
.type
!= BT_UNKNOWN
)
1758 /* We already know this one is an intrinsic, so we don't call
1759 gfc_is_intrinsic for full checking but rather use gfc_find_function and
1760 gfc_find_subroutine directly to check whether it is a function or
1763 if (sym
->intmod_sym_id
&& sym
->attr
.subroutine
)
1765 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1766 isym
= gfc_intrinsic_subroutine_by_id (id
);
1768 else if (sym
->intmod_sym_id
)
1770 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1771 isym
= gfc_intrinsic_function_by_id (id
);
1773 else if (!sym
->attr
.subroutine
)
1774 isym
= gfc_find_function (sym
->name
);
1776 if (isym
&& !sym
->attr
.subroutine
)
1778 if (sym
->ts
.type
!= BT_UNKNOWN
&& warn_surprising
1779 && !sym
->attr
.implicit_type
)
1780 gfc_warning (OPT_Wsurprising
,
1781 "Type specified for intrinsic function %qs at %L is"
1782 " ignored", sym
->name
, &sym
->declared_at
);
1784 if (!sym
->attr
.function
&&
1785 !gfc_add_function(&sym
->attr
, sym
->name
, loc
))
1790 else if (isym
|| (isym
= gfc_find_subroutine (sym
->name
)))
1792 if (sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.implicit_type
)
1794 gfc_error ("Intrinsic subroutine %qs at %L shall not have a type"
1795 " specifier", sym
->name
, &sym
->declared_at
);
1799 if (!sym
->attr
.subroutine
&&
1800 !gfc_add_subroutine(&sym
->attr
, sym
->name
, loc
))
1805 gfc_error ("%qs declared INTRINSIC at %L does not exist", sym
->name
,
1810 gfc_copy_formal_args_intr (sym
, isym
, NULL
);
1812 sym
->attr
.pure
= isym
->pure
;
1813 sym
->attr
.elemental
= isym
->elemental
;
1815 /* Check it is actually available in the standard settings. */
1816 if (!gfc_check_intrinsic_standard (isym
, &symstd
, false, sym
->declared_at
))
1818 gfc_error ("The intrinsic %qs declared INTRINSIC at %L is not "
1819 "available in the current standard settings but %s. Use "
1820 "an appropriate %<-std=*%> option or enable "
1821 "%<-fall-intrinsics%> in order to use it.",
1822 sym
->name
, &sym
->declared_at
, symstd
);
1830 /* Resolve a procedure expression, like passing it to a called procedure or as
1831 RHS for a procedure pointer assignment. */
1834 resolve_procedure_expression (gfc_expr
* expr
)
1838 if (expr
->expr_type
!= EXPR_VARIABLE
)
1840 gcc_assert (expr
->symtree
);
1842 sym
= expr
->symtree
->n
.sym
;
1844 if (sym
->attr
.intrinsic
)
1845 gfc_resolve_intrinsic (sym
, &expr
->where
);
1847 if (sym
->attr
.flavor
!= FL_PROCEDURE
1848 || (sym
->attr
.function
&& sym
->result
== sym
))
1851 /* A non-RECURSIVE procedure that is used as procedure expression within its
1852 own body is in danger of being called recursively. */
1853 if (is_illegal_recursion (sym
, gfc_current_ns
))
1854 gfc_warning (0, "Non-RECURSIVE procedure %qs at %L is possibly calling"
1855 " itself recursively. Declare it RECURSIVE or use"
1856 " %<-frecursive%>", sym
->name
, &expr
->where
);
1862 /* Resolve an actual argument list. Most of the time, this is just
1863 resolving the expressions in the list.
1864 The exception is that we sometimes have to decide whether arguments
1865 that look like procedure arguments are really simple variable
1869 resolve_actual_arglist (gfc_actual_arglist
*arg
, procedure_type ptype
,
1870 bool no_formal_args
)
1873 gfc_symtree
*parent_st
;
1875 gfc_component
*comp
;
1876 int save_need_full_assumed_size
;
1877 bool return_value
= false;
1878 bool actual_arg_sav
= actual_arg
, first_actual_arg_sav
= first_actual_arg
;
1881 first_actual_arg
= true;
1883 for (; arg
; arg
= arg
->next
)
1888 /* Check the label is a valid branching target. */
1891 if (arg
->label
->defined
== ST_LABEL_UNKNOWN
)
1893 gfc_error ("Label %d referenced at %L is never defined",
1894 arg
->label
->value
, &arg
->label
->where
);
1898 first_actual_arg
= false;
1902 if (e
->expr_type
== EXPR_VARIABLE
1903 && e
->symtree
->n
.sym
->attr
.generic
1905 && count_specific_procs (e
) != 1)
1908 if (e
->ts
.type
!= BT_PROCEDURE
)
1910 save_need_full_assumed_size
= need_full_assumed_size
;
1911 if (e
->expr_type
!= EXPR_VARIABLE
)
1912 need_full_assumed_size
= 0;
1913 if (!gfc_resolve_expr (e
))
1915 need_full_assumed_size
= save_need_full_assumed_size
;
1919 /* See if the expression node should really be a variable reference. */
1921 sym
= e
->symtree
->n
.sym
;
1923 if (sym
->attr
.flavor
== FL_PROCEDURE
1924 || sym
->attr
.intrinsic
1925 || sym
->attr
.external
)
1929 /* If a procedure is not already determined to be something else
1930 check if it is intrinsic. */
1931 if (gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, e
->where
))
1932 sym
->attr
.intrinsic
= 1;
1934 if (sym
->attr
.proc
== PROC_ST_FUNCTION
)
1936 gfc_error ("Statement function %qs at %L is not allowed as an "
1937 "actual argument", sym
->name
, &e
->where
);
1940 actual_ok
= gfc_intrinsic_actual_ok (sym
->name
,
1941 sym
->attr
.subroutine
);
1942 if (sym
->attr
.intrinsic
&& actual_ok
== 0)
1944 gfc_error ("Intrinsic %qs at %L is not allowed as an "
1945 "actual argument", sym
->name
, &e
->where
);
1948 if (sym
->attr
.contained
&& !sym
->attr
.use_assoc
1949 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
1951 if (!gfc_notify_std (GFC_STD_F2008
, "Internal procedure %qs is"
1952 " used as actual argument at %L",
1953 sym
->name
, &e
->where
))
1957 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
)
1959 gfc_error ("ELEMENTAL non-INTRINSIC procedure %qs is not "
1960 "allowed as an actual argument at %L", sym
->name
,
1964 /* Check if a generic interface has a specific procedure
1965 with the same name before emitting an error. */
1966 if (sym
->attr
.generic
&& count_specific_procs (e
) != 1)
1969 /* Just in case a specific was found for the expression. */
1970 sym
= e
->symtree
->n
.sym
;
1972 /* If the symbol is the function that names the current (or
1973 parent) scope, then we really have a variable reference. */
1975 if (gfc_is_function_return_value (sym
, sym
->ns
))
1978 /* If all else fails, see if we have a specific intrinsic. */
1979 if (sym
->ts
.type
== BT_UNKNOWN
&& sym
->attr
.intrinsic
)
1981 gfc_intrinsic_sym
*isym
;
1983 isym
= gfc_find_function (sym
->name
);
1984 if (isym
== NULL
|| !isym
->specific
)
1986 gfc_error ("Unable to find a specific INTRINSIC procedure "
1987 "for the reference %qs at %L", sym
->name
,
1992 sym
->attr
.intrinsic
= 1;
1993 sym
->attr
.function
= 1;
1996 if (!gfc_resolve_expr (e
))
2001 /* See if the name is a module procedure in a parent unit. */
2003 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
2006 if (gfc_find_sym_tree (sym
->name
, sym
->ns
->parent
, 1, &parent_st
))
2008 gfc_error ("Symbol %qs at %L is ambiguous", sym
->name
, &e
->where
);
2012 if (parent_st
== NULL
)
2015 sym
= parent_st
->n
.sym
;
2016 e
->symtree
= parent_st
; /* Point to the right thing. */
2018 if (sym
->attr
.flavor
== FL_PROCEDURE
2019 || sym
->attr
.intrinsic
2020 || sym
->attr
.external
)
2022 if (!gfc_resolve_expr (e
))
2028 e
->expr_type
= EXPR_VARIABLE
;
2030 if ((sym
->as
!= NULL
&& sym
->ts
.type
!= BT_CLASS
)
2031 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
2032 && CLASS_DATA (sym
)->as
))
2034 e
->rank
= sym
->ts
.type
== BT_CLASS
2035 ? CLASS_DATA (sym
)->as
->rank
: sym
->as
->rank
;
2036 e
->ref
= gfc_get_ref ();
2037 e
->ref
->type
= REF_ARRAY
;
2038 e
->ref
->u
.ar
.type
= AR_FULL
;
2039 e
->ref
->u
.ar
.as
= sym
->ts
.type
== BT_CLASS
2040 ? CLASS_DATA (sym
)->as
: sym
->as
;
2043 /* Expressions are assigned a default ts.type of BT_PROCEDURE in
2044 primary.c (match_actual_arg). If above code determines that it
2045 is a variable instead, it needs to be resolved as it was not
2046 done at the beginning of this function. */
2047 save_need_full_assumed_size
= need_full_assumed_size
;
2048 if (e
->expr_type
!= EXPR_VARIABLE
)
2049 need_full_assumed_size
= 0;
2050 if (!gfc_resolve_expr (e
))
2052 need_full_assumed_size
= save_need_full_assumed_size
;
2055 /* Check argument list functions %VAL, %LOC and %REF. There is
2056 nothing to do for %REF. */
2057 if (arg
->name
&& arg
->name
[0] == '%')
2059 if (strncmp ("%VAL", arg
->name
, 4) == 0)
2061 if (e
->ts
.type
== BT_CHARACTER
|| e
->ts
.type
== BT_DERIVED
)
2063 gfc_error ("By-value argument at %L is not of numeric "
2070 gfc_error ("By-value argument at %L cannot be an array or "
2071 "an array section", &e
->where
);
2075 /* Intrinsics are still PROC_UNKNOWN here. However,
2076 since same file external procedures are not resolvable
2077 in gfortran, it is a good deal easier to leave them to
2079 if (ptype
!= PROC_UNKNOWN
2080 && ptype
!= PROC_DUMMY
2081 && ptype
!= PROC_EXTERNAL
2082 && ptype
!= PROC_MODULE
)
2084 gfc_error ("By-value argument at %L is not allowed "
2085 "in this context", &e
->where
);
2090 /* Statement functions have already been excluded above. */
2091 else if (strncmp ("%LOC", arg
->name
, 4) == 0
2092 && e
->ts
.type
== BT_PROCEDURE
)
2094 if (e
->symtree
->n
.sym
->attr
.proc
== PROC_INTERNAL
)
2096 gfc_error ("Passing internal procedure at %L by location "
2097 "not allowed", &e
->where
);
2103 comp
= gfc_get_proc_ptr_comp(e
);
2104 if (e
->expr_type
== EXPR_VARIABLE
2105 && comp
&& comp
->attr
.elemental
)
2107 gfc_error ("ELEMENTAL procedure pointer component %qs is not "
2108 "allowed as an actual argument at %L", comp
->name
,
2112 /* Fortran 2008, C1237. */
2113 if (e
->expr_type
== EXPR_VARIABLE
&& gfc_is_coindexed (e
)
2114 && gfc_has_ultimate_pointer (e
))
2116 gfc_error ("Coindexed actual argument at %L with ultimate pointer "
2117 "component", &e
->where
);
2121 first_actual_arg
= false;
2124 return_value
= true;
2127 actual_arg
= actual_arg_sav
;
2128 first_actual_arg
= first_actual_arg_sav
;
2130 return return_value
;
2134 /* Do the checks of the actual argument list that are specific to elemental
2135 procedures. If called with c == NULL, we have a function, otherwise if
2136 expr == NULL, we have a subroutine. */
2139 resolve_elemental_actual (gfc_expr
*expr
, gfc_code
*c
)
2141 gfc_actual_arglist
*arg0
;
2142 gfc_actual_arglist
*arg
;
2143 gfc_symbol
*esym
= NULL
;
2144 gfc_intrinsic_sym
*isym
= NULL
;
2146 gfc_intrinsic_arg
*iformal
= NULL
;
2147 gfc_formal_arglist
*eformal
= NULL
;
2148 bool formal_optional
= false;
2149 bool set_by_optional
= false;
2153 /* Is this an elemental procedure? */
2154 if (expr
&& expr
->value
.function
.actual
!= NULL
)
2156 if (expr
->value
.function
.esym
!= NULL
2157 && expr
->value
.function
.esym
->attr
.elemental
)
2159 arg0
= expr
->value
.function
.actual
;
2160 esym
= expr
->value
.function
.esym
;
2162 else if (expr
->value
.function
.isym
!= NULL
2163 && expr
->value
.function
.isym
->elemental
)
2165 arg0
= expr
->value
.function
.actual
;
2166 isym
= expr
->value
.function
.isym
;
2171 else if (c
&& c
->ext
.actual
!= NULL
)
2173 arg0
= c
->ext
.actual
;
2175 if (c
->resolved_sym
)
2176 esym
= c
->resolved_sym
;
2178 esym
= c
->symtree
->n
.sym
;
2181 if (!esym
->attr
.elemental
)
2187 /* The rank of an elemental is the rank of its array argument(s). */
2188 for (arg
= arg0
; arg
; arg
= arg
->next
)
2190 if (arg
->expr
!= NULL
&& arg
->expr
->rank
!= 0)
2192 rank
= arg
->expr
->rank
;
2193 if (arg
->expr
->expr_type
== EXPR_VARIABLE
2194 && arg
->expr
->symtree
->n
.sym
->attr
.optional
)
2195 set_by_optional
= true;
2197 /* Function specific; set the result rank and shape. */
2201 if (!expr
->shape
&& arg
->expr
->shape
)
2203 expr
->shape
= gfc_get_shape (rank
);
2204 for (i
= 0; i
< rank
; i
++)
2205 mpz_init_set (expr
->shape
[i
], arg
->expr
->shape
[i
]);
2212 /* If it is an array, it shall not be supplied as an actual argument
2213 to an elemental procedure unless an array of the same rank is supplied
2214 as an actual argument corresponding to a nonoptional dummy argument of
2215 that elemental procedure(12.4.1.5). */
2216 formal_optional
= false;
2218 iformal
= isym
->formal
;
2220 eformal
= esym
->formal
;
2222 for (arg
= arg0
; arg
; arg
= arg
->next
)
2226 if (eformal
->sym
&& eformal
->sym
->attr
.optional
)
2227 formal_optional
= true;
2228 eformal
= eformal
->next
;
2230 else if (isym
&& iformal
)
2232 if (iformal
->optional
)
2233 formal_optional
= true;
2234 iformal
= iformal
->next
;
2237 formal_optional
= true;
2239 if (pedantic
&& arg
->expr
!= NULL
2240 && arg
->expr
->expr_type
== EXPR_VARIABLE
2241 && arg
->expr
->symtree
->n
.sym
->attr
.optional
2244 && (set_by_optional
|| arg
->expr
->rank
!= rank
)
2245 && !(isym
&& isym
->id
== GFC_ISYM_CONVERSION
))
2247 gfc_warning (OPT_Wpedantic
,
2248 "%qs at %L is an array and OPTIONAL; IF IT IS "
2249 "MISSING, it cannot be the actual argument of an "
2250 "ELEMENTAL procedure unless there is a non-optional "
2251 "argument with the same rank (12.4.1.5)",
2252 arg
->expr
->symtree
->n
.sym
->name
, &arg
->expr
->where
);
2256 for (arg
= arg0
; arg
; arg
= arg
->next
)
2258 if (arg
->expr
== NULL
|| arg
->expr
->rank
== 0)
2261 /* Being elemental, the last upper bound of an assumed size array
2262 argument must be present. */
2263 if (resolve_assumed_size_actual (arg
->expr
))
2266 /* Elemental procedure's array actual arguments must conform. */
2269 if (!gfc_check_conformance (arg
->expr
, e
, "elemental procedure"))
2276 /* INTENT(OUT) is only allowed for subroutines; if any actual argument
2277 is an array, the intent inout/out variable needs to be also an array. */
2278 if (rank
> 0 && esym
&& expr
== NULL
)
2279 for (eformal
= esym
->formal
, arg
= arg0
; arg
&& eformal
;
2280 arg
= arg
->next
, eformal
= eformal
->next
)
2281 if ((eformal
->sym
->attr
.intent
== INTENT_OUT
2282 || eformal
->sym
->attr
.intent
== INTENT_INOUT
)
2283 && arg
->expr
&& arg
->expr
->rank
== 0)
2285 gfc_error ("Actual argument at %L for INTENT(%s) dummy %qs of "
2286 "ELEMENTAL subroutine %qs is a scalar, but another "
2287 "actual argument is an array", &arg
->expr
->where
,
2288 (eformal
->sym
->attr
.intent
== INTENT_OUT
) ? "OUT"
2289 : "INOUT", eformal
->sym
->name
, esym
->name
);
2296 /* This function does the checking of references to global procedures
2297 as defined in sections 18.1 and 14.1, respectively, of the Fortran
2298 77 and 95 standards. It checks for a gsymbol for the name, making
2299 one if it does not already exist. If it already exists, then the
2300 reference being resolved must correspond to the type of gsymbol.
2301 Otherwise, the new symbol is equipped with the attributes of the
2302 reference. The corresponding code that is called in creating
2303 global entities is parse.c.
2305 In addition, for all but -std=legacy, the gsymbols are used to
2306 check the interfaces of external procedures from the same file.
2307 The namespace of the gsymbol is resolved and then, once this is
2308 done the interface is checked. */
2312 not_in_recursive (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2314 if (!gsym_ns
->proc_name
->attr
.recursive
)
2317 if (sym
->ns
== gsym_ns
)
2320 if (sym
->ns
->parent
&& sym
->ns
->parent
== gsym_ns
)
2327 not_entry_self_reference (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2329 if (gsym_ns
->entries
)
2331 gfc_entry_list
*entry
= gsym_ns
->entries
;
2333 for (; entry
; entry
= entry
->next
)
2335 if (strcmp (sym
->name
, entry
->sym
->name
) == 0)
2337 if (strcmp (gsym_ns
->proc_name
->name
,
2338 sym
->ns
->proc_name
->name
) == 0)
2342 && strcmp (gsym_ns
->proc_name
->name
,
2343 sym
->ns
->parent
->proc_name
->name
) == 0)
2352 /* Check for the requirement of an explicit interface. F08:12.4.2.2. */
2355 gfc_explicit_interface_required (gfc_symbol
*sym
, char *errmsg
, int err_len
)
2357 gfc_formal_arglist
*arg
= gfc_sym_get_dummy_args (sym
);
2359 for ( ; arg
; arg
= arg
->next
)
2364 if (arg
->sym
->attr
.allocatable
) /* (2a) */
2366 strncpy (errmsg
, _("allocatable argument"), err_len
);
2369 else if (arg
->sym
->attr
.asynchronous
)
2371 strncpy (errmsg
, _("asynchronous argument"), err_len
);
2374 else if (arg
->sym
->attr
.optional
)
2376 strncpy (errmsg
, _("optional argument"), err_len
);
2379 else if (arg
->sym
->attr
.pointer
)
2381 strncpy (errmsg
, _("pointer argument"), err_len
);
2384 else if (arg
->sym
->attr
.target
)
2386 strncpy (errmsg
, _("target argument"), err_len
);
2389 else if (arg
->sym
->attr
.value
)
2391 strncpy (errmsg
, _("value argument"), err_len
);
2394 else if (arg
->sym
->attr
.volatile_
)
2396 strncpy (errmsg
, _("volatile argument"), err_len
);
2399 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_SHAPE
) /* (2b) */
2401 strncpy (errmsg
, _("assumed-shape argument"), err_len
);
2404 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_RANK
) /* TS 29113, 6.2. */
2406 strncpy (errmsg
, _("assumed-rank argument"), err_len
);
2409 else if (arg
->sym
->attr
.codimension
) /* (2c) */
2411 strncpy (errmsg
, _("coarray argument"), err_len
);
2414 else if (false) /* (2d) TODO: parametrized derived type */
2416 strncpy (errmsg
, _("parametrized derived type argument"), err_len
);
2419 else if (arg
->sym
->ts
.type
== BT_CLASS
) /* (2e) */
2421 strncpy (errmsg
, _("polymorphic argument"), err_len
);
2424 else if (arg
->sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
2426 strncpy (errmsg
, _("NO_ARG_CHECK attribute"), err_len
);
2429 else if (arg
->sym
->ts
.type
== BT_ASSUMED
)
2431 /* As assumed-type is unlimited polymorphic (cf. above).
2432 See also TS 29113, Note 6.1. */
2433 strncpy (errmsg
, _("assumed-type argument"), err_len
);
2438 if (sym
->attr
.function
)
2440 gfc_symbol
*res
= sym
->result
? sym
->result
: sym
;
2442 if (res
->attr
.dimension
) /* (3a) */
2444 strncpy (errmsg
, _("array result"), err_len
);
2447 else if (res
->attr
.pointer
|| res
->attr
.allocatable
) /* (3b) */
2449 strncpy (errmsg
, _("pointer or allocatable result"), err_len
);
2452 else if (res
->ts
.type
== BT_CHARACTER
&& res
->ts
.u
.cl
2453 && res
->ts
.u
.cl
->length
2454 && res
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
) /* (3c) */
2456 strncpy (errmsg
, _("result with non-constant character length"), err_len
);
2461 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
) /* (4) */
2463 strncpy (errmsg
, _("elemental procedure"), err_len
);
2466 else if (sym
->attr
.is_bind_c
) /* (5) */
2468 strncpy (errmsg
, _("bind(c) procedure"), err_len
);
2477 resolve_global_procedure (gfc_symbol
*sym
, locus
*where
,
2478 gfc_actual_arglist
**actual
, int sub
)
2482 enum gfc_symbol_type type
;
2485 type
= sub
? GSYM_SUBROUTINE
: GSYM_FUNCTION
;
2487 gsym
= gfc_get_gsymbol (sym
->binding_label
? sym
->binding_label
: sym
->name
);
2489 if ((gsym
->type
!= GSYM_UNKNOWN
&& gsym
->type
!= type
))
2490 gfc_global_used (gsym
, where
);
2492 if ((sym
->attr
.if_source
== IFSRC_UNKNOWN
2493 || sym
->attr
.if_source
== IFSRC_IFBODY
)
2494 && gsym
->type
!= GSYM_UNKNOWN
2495 && !gsym
->binding_label
2497 && gsym
->ns
->resolved
!= -1
2498 && gsym
->ns
->proc_name
2499 && not_in_recursive (sym
, gsym
->ns
)
2500 && not_entry_self_reference (sym
, gsym
->ns
))
2502 gfc_symbol
*def_sym
;
2504 /* Resolve the gsymbol namespace if needed. */
2505 if (!gsym
->ns
->resolved
)
2507 gfc_dt_list
*old_dt_list
;
2509 /* Stash away derived types so that the backend_decls do not
2511 old_dt_list
= gfc_derived_types
;
2512 gfc_derived_types
= NULL
;
2514 gfc_resolve (gsym
->ns
);
2516 /* Store the new derived types with the global namespace. */
2517 if (gfc_derived_types
)
2518 gsym
->ns
->derived_types
= gfc_derived_types
;
2520 /* Restore the derived types of this namespace. */
2521 gfc_derived_types
= old_dt_list
;
2524 /* Make sure that translation for the gsymbol occurs before
2525 the procedure currently being resolved. */
2526 ns
= gfc_global_ns_list
;
2527 for (; ns
&& ns
!= gsym
->ns
; ns
= ns
->sibling
)
2529 if (ns
->sibling
== gsym
->ns
)
2531 ns
->sibling
= gsym
->ns
->sibling
;
2532 gsym
->ns
->sibling
= gfc_global_ns_list
;
2533 gfc_global_ns_list
= gsym
->ns
;
2538 def_sym
= gsym
->ns
->proc_name
;
2540 /* This can happen if a binding name has been specified. */
2541 if (gsym
->binding_label
&& gsym
->sym_name
!= def_sym
->name
)
2542 gfc_find_symbol (gsym
->sym_name
, gsym
->ns
, 0, &def_sym
);
2544 if (def_sym
->attr
.entry_master
)
2546 gfc_entry_list
*entry
;
2547 for (entry
= gsym
->ns
->entries
; entry
; entry
= entry
->next
)
2548 if (strcmp (entry
->sym
->name
, sym
->name
) == 0)
2550 def_sym
= entry
->sym
;
2555 if (sym
->attr
.function
&& !gfc_compare_types (&sym
->ts
, &def_sym
->ts
))
2557 gfc_error ("Return type mismatch of function %qs at %L (%s/%s)",
2558 sym
->name
, &sym
->declared_at
, gfc_typename (&sym
->ts
),
2559 gfc_typename (&def_sym
->ts
));
2563 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
2564 && gfc_explicit_interface_required (def_sym
, reason
, sizeof(reason
)))
2566 gfc_error ("Explicit interface required for %qs at %L: %s",
2567 sym
->name
, &sym
->declared_at
, reason
);
2571 if (!pedantic
&& (gfc_option
.allow_std
& GFC_STD_GNU
))
2572 /* Turn erros into warnings with -std=gnu and -std=legacy. */
2573 gfc_errors_to_warnings (true);
2575 if (!gfc_compare_interfaces (sym
, def_sym
, sym
->name
, 0, 1,
2576 reason
, sizeof(reason
), NULL
, NULL
))
2578 gfc_error_opt (OPT_Wargument_mismatch
,
2579 "Interface mismatch in global procedure %qs at %L:"
2580 " %s", sym
->name
, &sym
->declared_at
, reason
);
2585 || ((gfc_option
.warn_std
& GFC_STD_LEGACY
)
2586 && !(gfc_option
.warn_std
& GFC_STD_GNU
)))
2587 gfc_errors_to_warnings (true);
2589 if (sym
->attr
.if_source
!= IFSRC_IFBODY
)
2590 gfc_procedure_use (def_sym
, actual
, where
);
2594 gfc_errors_to_warnings (false);
2596 if (gsym
->type
== GSYM_UNKNOWN
)
2599 gsym
->where
= *where
;
2606 /************* Function resolution *************/
2608 /* Resolve a function call known to be generic.
2609 Section 14.1.2.4.1. */
2612 resolve_generic_f0 (gfc_expr
*expr
, gfc_symbol
*sym
)
2616 if (sym
->attr
.generic
)
2618 s
= gfc_search_interface (sym
->generic
, 0, &expr
->value
.function
.actual
);
2621 expr
->value
.function
.name
= s
->name
;
2622 expr
->value
.function
.esym
= s
;
2624 if (s
->ts
.type
!= BT_UNKNOWN
)
2626 else if (s
->result
!= NULL
&& s
->result
->ts
.type
!= BT_UNKNOWN
)
2627 expr
->ts
= s
->result
->ts
;
2630 expr
->rank
= s
->as
->rank
;
2631 else if (s
->result
!= NULL
&& s
->result
->as
!= NULL
)
2632 expr
->rank
= s
->result
->as
->rank
;
2634 gfc_set_sym_referenced (expr
->value
.function
.esym
);
2639 /* TODO: Need to search for elemental references in generic
2643 if (sym
->attr
.intrinsic
)
2644 return gfc_intrinsic_func_interface (expr
, 0);
2651 resolve_generic_f (gfc_expr
*expr
)
2655 gfc_interface
*intr
= NULL
;
2657 sym
= expr
->symtree
->n
.sym
;
2661 m
= resolve_generic_f0 (expr
, sym
);
2664 else if (m
== MATCH_ERROR
)
2669 for (intr
= sym
->generic
; intr
; intr
= intr
->next
)
2670 if (gfc_fl_struct (intr
->sym
->attr
.flavor
))
2673 if (sym
->ns
->parent
== NULL
)
2675 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2679 if (!generic_sym (sym
))
2683 /* Last ditch attempt. See if the reference is to an intrinsic
2684 that possesses a matching interface. 14.1.2.4 */
2685 if (sym
&& !intr
&& !gfc_is_intrinsic (sym
, 0, expr
->where
))
2687 if (gfc_init_expr_flag
)
2688 gfc_error ("Function %qs in initialization expression at %L "
2689 "must be an intrinsic function",
2690 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2692 gfc_error ("There is no specific function for the generic %qs "
2693 "at %L", expr
->symtree
->n
.sym
->name
, &expr
->where
);
2699 if (!gfc_convert_to_structure_constructor (expr
, intr
->sym
, NULL
,
2702 if (!gfc_use_derived (expr
->ts
.u
.derived
))
2704 return resolve_structure_cons (expr
, 0);
2707 m
= gfc_intrinsic_func_interface (expr
, 0);
2712 gfc_error ("Generic function %qs at %L is not consistent with a "
2713 "specific intrinsic interface", expr
->symtree
->n
.sym
->name
,
2720 /* Resolve a function call known to be specific. */
2723 resolve_specific_f0 (gfc_symbol
*sym
, gfc_expr
*expr
)
2727 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
2729 if (sym
->attr
.dummy
)
2731 sym
->attr
.proc
= PROC_DUMMY
;
2735 sym
->attr
.proc
= PROC_EXTERNAL
;
2739 if (sym
->attr
.proc
== PROC_MODULE
2740 || sym
->attr
.proc
== PROC_ST_FUNCTION
2741 || sym
->attr
.proc
== PROC_INTERNAL
)
2744 if (sym
->attr
.intrinsic
)
2746 m
= gfc_intrinsic_func_interface (expr
, 1);
2750 gfc_error ("Function %qs at %L is INTRINSIC but is not compatible "
2751 "with an intrinsic", sym
->name
, &expr
->where
);
2759 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2762 expr
->ts
= sym
->result
->ts
;
2765 expr
->value
.function
.name
= sym
->name
;
2766 expr
->value
.function
.esym
= sym
;
2767 /* Prevent crash when sym->ts.u.derived->components is not set due to previous
2769 if (sym
->ts
.type
== BT_CLASS
&& !CLASS_DATA (sym
))
2771 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)
2772 expr
->rank
= CLASS_DATA (sym
)->as
->rank
;
2773 else if (sym
->as
!= NULL
)
2774 expr
->rank
= sym
->as
->rank
;
2781 resolve_specific_f (gfc_expr
*expr
)
2786 sym
= expr
->symtree
->n
.sym
;
2790 m
= resolve_specific_f0 (sym
, expr
);
2793 if (m
== MATCH_ERROR
)
2796 if (sym
->ns
->parent
== NULL
)
2799 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2805 gfc_error ("Unable to resolve the specific function %qs at %L",
2806 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2811 /* Recursively append candidate SYM to CANDIDATES. Store the number of
2812 candidates in CANDIDATES_LEN. */
2815 lookup_function_fuzzy_find_candidates (gfc_symtree
*sym
,
2817 size_t &candidates_len
)
2823 if ((sym
->n
.sym
->ts
.type
!= BT_UNKNOWN
|| sym
->n
.sym
->attr
.external
)
2824 && sym
->n
.sym
->attr
.flavor
== FL_PROCEDURE
)
2825 vec_push (candidates
, candidates_len
, sym
->name
);
2829 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2833 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2837 /* Lookup function FN fuzzily, taking names in SYMROOT into account. */
2840 gfc_lookup_function_fuzzy (const char *fn
, gfc_symtree
*symroot
)
2842 char **candidates
= NULL
;
2843 size_t candidates_len
= 0;
2844 lookup_function_fuzzy_find_candidates (symroot
, candidates
, candidates_len
);
2845 return gfc_closest_fuzzy_match (fn
, candidates
);
2849 /* Resolve a procedure call not known to be generic nor specific. */
2852 resolve_unknown_f (gfc_expr
*expr
)
2857 sym
= expr
->symtree
->n
.sym
;
2859 if (sym
->attr
.dummy
)
2861 sym
->attr
.proc
= PROC_DUMMY
;
2862 expr
->value
.function
.name
= sym
->name
;
2866 /* See if we have an intrinsic function reference. */
2868 if (gfc_is_intrinsic (sym
, 0, expr
->where
))
2870 if (gfc_intrinsic_func_interface (expr
, 1) == MATCH_YES
)
2875 /* The reference is to an external name. */
2877 sym
->attr
.proc
= PROC_EXTERNAL
;
2878 expr
->value
.function
.name
= sym
->name
;
2879 expr
->value
.function
.esym
= expr
->symtree
->n
.sym
;
2881 if (sym
->as
!= NULL
)
2882 expr
->rank
= sym
->as
->rank
;
2884 /* Type of the expression is either the type of the symbol or the
2885 default type of the symbol. */
2888 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2890 if (sym
->ts
.type
!= BT_UNKNOWN
)
2894 ts
= gfc_get_default_type (sym
->name
, sym
->ns
);
2896 if (ts
->type
== BT_UNKNOWN
)
2899 = gfc_lookup_function_fuzzy (sym
->name
, sym
->ns
->sym_root
);
2901 gfc_error ("Function %qs at %L has no IMPLICIT type"
2902 "; did you mean %qs?",
2903 sym
->name
, &expr
->where
, guessed
);
2905 gfc_error ("Function %qs at %L has no IMPLICIT type",
2906 sym
->name
, &expr
->where
);
2917 /* Return true, if the symbol is an external procedure. */
2919 is_external_proc (gfc_symbol
*sym
)
2921 if (!sym
->attr
.dummy
&& !sym
->attr
.contained
2922 && !gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, sym
->declared_at
)
2923 && sym
->attr
.proc
!= PROC_ST_FUNCTION
2924 && !sym
->attr
.proc_pointer
2925 && !sym
->attr
.use_assoc
2933 /* Figure out if a function reference is pure or not. Also set the name
2934 of the function for a potential error message. Return nonzero if the
2935 function is PURE, zero if not. */
2937 pure_stmt_function (gfc_expr
*, gfc_symbol
*);
2940 pure_function (gfc_expr
*e
, const char **name
)
2943 gfc_component
*comp
;
2947 if (e
->symtree
!= NULL
2948 && e
->symtree
->n
.sym
!= NULL
2949 && e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
2950 return pure_stmt_function (e
, e
->symtree
->n
.sym
);
2952 comp
= gfc_get_proc_ptr_comp (e
);
2955 pure
= gfc_pure (comp
->ts
.interface
);
2958 else if (e
->value
.function
.esym
)
2960 pure
= gfc_pure (e
->value
.function
.esym
);
2961 *name
= e
->value
.function
.esym
->name
;
2963 else if (e
->value
.function
.isym
)
2965 pure
= e
->value
.function
.isym
->pure
2966 || e
->value
.function
.isym
->elemental
;
2967 *name
= e
->value
.function
.isym
->name
;
2971 /* Implicit functions are not pure. */
2973 *name
= e
->value
.function
.name
;
2981 impure_stmt_fcn (gfc_expr
*e
, gfc_symbol
*sym
,
2982 int *f ATTRIBUTE_UNUSED
)
2986 /* Don't bother recursing into other statement functions
2987 since they will be checked individually for purity. */
2988 if (e
->expr_type
!= EXPR_FUNCTION
2990 || e
->symtree
->n
.sym
== sym
2991 || e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
2994 return pure_function (e
, &name
) ? false : true;
2999 pure_stmt_function (gfc_expr
*e
, gfc_symbol
*sym
)
3001 return gfc_traverse_expr (e
, sym
, impure_stmt_fcn
, 0) ? 0 : 1;
3005 /* Check if an impure function is allowed in the current context. */
3007 static bool check_pure_function (gfc_expr
*e
)
3009 const char *name
= NULL
;
3010 if (!pure_function (e
, &name
) && name
)
3014 gfc_error ("Reference to impure function %qs at %L inside a "
3015 "FORALL %s", name
, &e
->where
,
3016 forall_flag
== 2 ? "mask" : "block");
3019 else if (gfc_do_concurrent_flag
)
3021 gfc_error ("Reference to impure function %qs at %L inside a "
3022 "DO CONCURRENT %s", name
, &e
->where
,
3023 gfc_do_concurrent_flag
== 2 ? "mask" : "block");
3026 else if (gfc_pure (NULL
))
3028 gfc_error ("Reference to impure function %qs at %L "
3029 "within a PURE procedure", name
, &e
->where
);
3032 gfc_unset_implicit_pure (NULL
);
3038 /* Update current procedure's array_outer_dependency flag, considering
3039 a call to procedure SYM. */
3042 update_current_proc_array_outer_dependency (gfc_symbol
*sym
)
3044 /* Check to see if this is a sibling function that has not yet
3046 gfc_namespace
*sibling
= gfc_current_ns
->sibling
;
3047 for (; sibling
; sibling
= sibling
->sibling
)
3049 if (sibling
->proc_name
== sym
)
3051 gfc_resolve (sibling
);
3056 /* If SYM has references to outer arrays, so has the procedure calling
3057 SYM. If SYM is a procedure pointer, we can assume the worst. */
3058 if (sym
->attr
.array_outer_dependency
3059 || sym
->attr
.proc_pointer
)
3060 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3064 /* Resolve a function call, which means resolving the arguments, then figuring
3065 out which entity the name refers to. */
3068 resolve_function (gfc_expr
*expr
)
3070 gfc_actual_arglist
*arg
;
3074 procedure_type p
= PROC_INTRINSIC
;
3075 bool no_formal_args
;
3079 sym
= expr
->symtree
->n
.sym
;
3081 /* If this is a procedure pointer component, it has already been resolved. */
3082 if (gfc_is_proc_ptr_comp (expr
))
3085 /* Avoid re-resolving the arguments of caf_get, which can lead to inserting
3087 if (sym
&& sym
->attr
.intrinsic
3088 && (sym
->intmod_sym_id
== GFC_ISYM_CAF_GET
3089 || sym
->intmod_sym_id
== GFC_ISYM_CAF_SEND
))
3092 if (sym
&& sym
->attr
.intrinsic
3093 && !gfc_resolve_intrinsic (sym
, &expr
->where
))
3096 if (sym
&& (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.subroutine
))
3098 gfc_error ("%qs at %L is not a function", sym
->name
, &expr
->where
);
3102 /* If this ia a deferred TBP with an abstract interface (which may
3103 of course be referenced), expr->value.function.esym will be set. */
3104 if (sym
&& sym
->attr
.abstract
&& !expr
->value
.function
.esym
)
3106 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3107 sym
->name
, &expr
->where
);
3111 /* Switch off assumed size checking and do this again for certain kinds
3112 of procedure, once the procedure itself is resolved. */
3113 need_full_assumed_size
++;
3115 if (expr
->symtree
&& expr
->symtree
->n
.sym
)
3116 p
= expr
->symtree
->n
.sym
->attr
.proc
;
3118 if (expr
->value
.function
.isym
&& expr
->value
.function
.isym
->inquiry
)
3119 inquiry_argument
= true;
3120 no_formal_args
= sym
&& is_external_proc (sym
)
3121 && gfc_sym_get_dummy_args (sym
) == NULL
;
3123 if (!resolve_actual_arglist (expr
->value
.function
.actual
,
3126 inquiry_argument
= false;
3130 inquiry_argument
= false;
3132 /* Resume assumed_size checking. */
3133 need_full_assumed_size
--;
3135 /* If the procedure is external, check for usage. */
3136 if (sym
&& is_external_proc (sym
))
3137 resolve_global_procedure (sym
, &expr
->where
,
3138 &expr
->value
.function
.actual
, 0);
3140 if (sym
&& sym
->ts
.type
== BT_CHARACTER
3142 && sym
->ts
.u
.cl
->length
== NULL
3144 && !sym
->ts
.deferred
3145 && expr
->value
.function
.esym
== NULL
3146 && !sym
->attr
.contained
)
3148 /* Internal procedures are taken care of in resolve_contained_fntype. */
3149 gfc_error ("Function %qs is declared CHARACTER(*) and cannot "
3150 "be used at %L since it is not a dummy argument",
3151 sym
->name
, &expr
->where
);
3155 /* See if function is already resolved. */
3157 if (expr
->value
.function
.name
!= NULL
3158 || expr
->value
.function
.isym
!= NULL
)
3160 if (expr
->ts
.type
== BT_UNKNOWN
)
3166 /* Apply the rules of section 14.1.2. */
3168 switch (procedure_kind (sym
))
3171 t
= resolve_generic_f (expr
);
3174 case PTYPE_SPECIFIC
:
3175 t
= resolve_specific_f (expr
);
3179 t
= resolve_unknown_f (expr
);
3183 gfc_internal_error ("resolve_function(): bad function type");
3187 /* If the expression is still a function (it might have simplified),
3188 then we check to see if we are calling an elemental function. */
3190 if (expr
->expr_type
!= EXPR_FUNCTION
)
3193 temp
= need_full_assumed_size
;
3194 need_full_assumed_size
= 0;
3196 if (!resolve_elemental_actual (expr
, NULL
))
3199 if (omp_workshare_flag
3200 && expr
->value
.function
.esym
3201 && ! gfc_elemental (expr
->value
.function
.esym
))
3203 gfc_error ("User defined non-ELEMENTAL function %qs at %L not allowed "
3204 "in WORKSHARE construct", expr
->value
.function
.esym
->name
,
3209 #define GENERIC_ID expr->value.function.isym->id
3210 else if (expr
->value
.function
.actual
!= NULL
3211 && expr
->value
.function
.isym
!= NULL
3212 && GENERIC_ID
!= GFC_ISYM_LBOUND
3213 && GENERIC_ID
!= GFC_ISYM_LCOBOUND
3214 && GENERIC_ID
!= GFC_ISYM_UCOBOUND
3215 && GENERIC_ID
!= GFC_ISYM_LEN
3216 && GENERIC_ID
!= GFC_ISYM_LOC
3217 && GENERIC_ID
!= GFC_ISYM_C_LOC
3218 && GENERIC_ID
!= GFC_ISYM_PRESENT
)
3220 /* Array intrinsics must also have the last upper bound of an
3221 assumed size array argument. UBOUND and SIZE have to be
3222 excluded from the check if the second argument is anything
3225 for (arg
= expr
->value
.function
.actual
; arg
; arg
= arg
->next
)
3227 if ((GENERIC_ID
== GFC_ISYM_UBOUND
|| GENERIC_ID
== GFC_ISYM_SIZE
)
3228 && arg
== expr
->value
.function
.actual
3229 && arg
->next
!= NULL
&& arg
->next
->expr
)
3231 if (arg
->next
->expr
->expr_type
!= EXPR_CONSTANT
)
3234 if (arg
->next
->name
&& strncmp (arg
->next
->name
, "kind", 4) == 0)
3237 if ((int)mpz_get_si (arg
->next
->expr
->value
.integer
)
3242 if (arg
->expr
!= NULL
3243 && arg
->expr
->rank
> 0
3244 && resolve_assumed_size_actual (arg
->expr
))
3250 need_full_assumed_size
= temp
;
3252 if (!check_pure_function(expr
))
3255 /* Functions without the RECURSIVE attribution are not allowed to
3256 * call themselves. */
3257 if (expr
->value
.function
.esym
&& !expr
->value
.function
.esym
->attr
.recursive
)
3260 esym
= expr
->value
.function
.esym
;
3262 if (is_illegal_recursion (esym
, gfc_current_ns
))
3264 if (esym
->attr
.entry
&& esym
->ns
->entries
)
3265 gfc_error ("ENTRY %qs at %L cannot be called recursively, as"
3266 " function %qs is not RECURSIVE",
3267 esym
->name
, &expr
->where
, esym
->ns
->entries
->sym
->name
);
3269 gfc_error ("Function %qs at %L cannot be called recursively, as it"
3270 " is not RECURSIVE", esym
->name
, &expr
->where
);
3276 /* Character lengths of use associated functions may contains references to
3277 symbols not referenced from the current program unit otherwise. Make sure
3278 those symbols are marked as referenced. */
3280 if (expr
->ts
.type
== BT_CHARACTER
&& expr
->value
.function
.esym
3281 && expr
->value
.function
.esym
->attr
.use_assoc
)
3283 gfc_expr_set_symbols_referenced (expr
->ts
.u
.cl
->length
);
3286 /* Make sure that the expression has a typespec that works. */
3287 if (expr
->ts
.type
== BT_UNKNOWN
)
3289 if (expr
->symtree
->n
.sym
->result
3290 && expr
->symtree
->n
.sym
->result
->ts
.type
!= BT_UNKNOWN
3291 && !expr
->symtree
->n
.sym
->result
->attr
.proc_pointer
)
3292 expr
->ts
= expr
->symtree
->n
.sym
->result
->ts
;
3295 if (!expr
->ref
&& !expr
->value
.function
.isym
)
3297 if (expr
->value
.function
.esym
)
3298 update_current_proc_array_outer_dependency (expr
->value
.function
.esym
);
3300 update_current_proc_array_outer_dependency (sym
);
3303 /* typebound procedure: Assume the worst. */
3304 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3310 /************* Subroutine resolution *************/
3313 pure_subroutine (gfc_symbol
*sym
, const char *name
, locus
*loc
)
3320 gfc_error ("Subroutine call to %qs in FORALL block at %L is not PURE",
3324 else if (gfc_do_concurrent_flag
)
3326 gfc_error ("Subroutine call to %qs in DO CONCURRENT block at %L is not "
3330 else if (gfc_pure (NULL
))
3332 gfc_error ("Subroutine call to %qs at %L is not PURE", name
, loc
);
3336 gfc_unset_implicit_pure (NULL
);
3342 resolve_generic_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3346 if (sym
->attr
.generic
)
3348 s
= gfc_search_interface (sym
->generic
, 1, &c
->ext
.actual
);
3351 c
->resolved_sym
= s
;
3352 if (!pure_subroutine (s
, s
->name
, &c
->loc
))
3357 /* TODO: Need to search for elemental references in generic interface. */
3360 if (sym
->attr
.intrinsic
)
3361 return gfc_intrinsic_sub_interface (c
, 0);
3368 resolve_generic_s (gfc_code
*c
)
3373 sym
= c
->symtree
->n
.sym
;
3377 m
= resolve_generic_s0 (c
, sym
);
3380 else if (m
== MATCH_ERROR
)
3384 if (sym
->ns
->parent
== NULL
)
3386 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3390 if (!generic_sym (sym
))
3394 /* Last ditch attempt. See if the reference is to an intrinsic
3395 that possesses a matching interface. 14.1.2.4 */
3396 sym
= c
->symtree
->n
.sym
;
3398 if (!gfc_is_intrinsic (sym
, 1, c
->loc
))
3400 gfc_error ("There is no specific subroutine for the generic %qs at %L",
3401 sym
->name
, &c
->loc
);
3405 m
= gfc_intrinsic_sub_interface (c
, 0);
3409 gfc_error ("Generic subroutine %qs at %L is not consistent with an "
3410 "intrinsic subroutine interface", sym
->name
, &c
->loc
);
3416 /* Resolve a subroutine call known to be specific. */
3419 resolve_specific_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3423 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
3425 if (sym
->attr
.dummy
)
3427 sym
->attr
.proc
= PROC_DUMMY
;
3431 sym
->attr
.proc
= PROC_EXTERNAL
;
3435 if (sym
->attr
.proc
== PROC_MODULE
|| sym
->attr
.proc
== PROC_INTERNAL
)
3438 if (sym
->attr
.intrinsic
)
3440 m
= gfc_intrinsic_sub_interface (c
, 1);
3444 gfc_error ("Subroutine %qs at %L is INTRINSIC but is not compatible "
3445 "with an intrinsic", sym
->name
, &c
->loc
);
3453 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3455 c
->resolved_sym
= sym
;
3456 if (!pure_subroutine (sym
, sym
->name
, &c
->loc
))
3464 resolve_specific_s (gfc_code
*c
)
3469 sym
= c
->symtree
->n
.sym
;
3473 m
= resolve_specific_s0 (c
, sym
);
3476 if (m
== MATCH_ERROR
)
3479 if (sym
->ns
->parent
== NULL
)
3482 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3488 sym
= c
->symtree
->n
.sym
;
3489 gfc_error ("Unable to resolve the specific subroutine %qs at %L",
3490 sym
->name
, &c
->loc
);
3496 /* Resolve a subroutine call not known to be generic nor specific. */
3499 resolve_unknown_s (gfc_code
*c
)
3503 sym
= c
->symtree
->n
.sym
;
3505 if (sym
->attr
.dummy
)
3507 sym
->attr
.proc
= PROC_DUMMY
;
3511 /* See if we have an intrinsic function reference. */
3513 if (gfc_is_intrinsic (sym
, 1, c
->loc
))
3515 if (gfc_intrinsic_sub_interface (c
, 1) == MATCH_YES
)
3520 /* The reference is to an external name. */
3523 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3525 c
->resolved_sym
= sym
;
3527 return pure_subroutine (sym
, sym
->name
, &c
->loc
);
3531 /* Resolve a subroutine call. Although it was tempting to use the same code
3532 for functions, subroutines and functions are stored differently and this
3533 makes things awkward. */
3536 resolve_call (gfc_code
*c
)
3539 procedure_type ptype
= PROC_INTRINSIC
;
3540 gfc_symbol
*csym
, *sym
;
3541 bool no_formal_args
;
3543 csym
= c
->symtree
? c
->symtree
->n
.sym
: NULL
;
3545 if (csym
&& csym
->ts
.type
!= BT_UNKNOWN
)
3547 gfc_error ("%qs at %L has a type, which is not consistent with "
3548 "the CALL at %L", csym
->name
, &csym
->declared_at
, &c
->loc
);
3552 if (csym
&& gfc_current_ns
->parent
&& csym
->ns
!= gfc_current_ns
)
3555 gfc_find_sym_tree (c
->symtree
->name
, gfc_current_ns
, 1, &st
);
3556 sym
= st
? st
->n
.sym
: NULL
;
3557 if (sym
&& csym
!= sym
3558 && sym
->ns
== gfc_current_ns
3559 && sym
->attr
.flavor
== FL_PROCEDURE
3560 && sym
->attr
.contained
)
3563 if (csym
->attr
.generic
)
3564 c
->symtree
->n
.sym
= sym
;
3567 csym
= c
->symtree
->n
.sym
;
3571 /* If this ia a deferred TBP, c->expr1 will be set. */
3572 if (!c
->expr1
&& csym
)
3574 if (csym
->attr
.abstract
)
3576 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3577 csym
->name
, &c
->loc
);
3581 /* Subroutines without the RECURSIVE attribution are not allowed to
3583 if (is_illegal_recursion (csym
, gfc_current_ns
))
3585 if (csym
->attr
.entry
&& csym
->ns
->entries
)
3586 gfc_error ("ENTRY %qs at %L cannot be called recursively, "
3587 "as subroutine %qs is not RECURSIVE",
3588 csym
->name
, &c
->loc
, csym
->ns
->entries
->sym
->name
);
3590 gfc_error ("SUBROUTINE %qs at %L cannot be called recursively, "
3591 "as it is not RECURSIVE", csym
->name
, &c
->loc
);
3597 /* Switch off assumed size checking and do this again for certain kinds
3598 of procedure, once the procedure itself is resolved. */
3599 need_full_assumed_size
++;
3602 ptype
= csym
->attr
.proc
;
3604 no_formal_args
= csym
&& is_external_proc (csym
)
3605 && gfc_sym_get_dummy_args (csym
) == NULL
;
3606 if (!resolve_actual_arglist (c
->ext
.actual
, ptype
, no_formal_args
))
3609 /* Resume assumed_size checking. */
3610 need_full_assumed_size
--;
3612 /* If external, check for usage. */
3613 if (csym
&& is_external_proc (csym
))
3614 resolve_global_procedure (csym
, &c
->loc
, &c
->ext
.actual
, 1);
3617 if (c
->resolved_sym
== NULL
)
3619 c
->resolved_isym
= NULL
;
3620 switch (procedure_kind (csym
))
3623 t
= resolve_generic_s (c
);
3626 case PTYPE_SPECIFIC
:
3627 t
= resolve_specific_s (c
);
3631 t
= resolve_unknown_s (c
);
3635 gfc_internal_error ("resolve_subroutine(): bad function type");
3639 /* Some checks of elemental subroutine actual arguments. */
3640 if (!resolve_elemental_actual (NULL
, c
))
3644 update_current_proc_array_outer_dependency (csym
);
3646 /* Typebound procedure: Assume the worst. */
3647 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3653 /* Compare the shapes of two arrays that have non-NULL shapes. If both
3654 op1->shape and op2->shape are non-NULL return true if their shapes
3655 match. If both op1->shape and op2->shape are non-NULL return false
3656 if their shapes do not match. If either op1->shape or op2->shape is
3657 NULL, return true. */
3660 compare_shapes (gfc_expr
*op1
, gfc_expr
*op2
)
3667 if (op1
->shape
!= NULL
&& op2
->shape
!= NULL
)
3669 for (i
= 0; i
< op1
->rank
; i
++)
3671 if (mpz_cmp (op1
->shape
[i
], op2
->shape
[i
]) != 0)
3673 gfc_error ("Shapes for operands at %L and %L are not conformable",
3674 &op1
->where
, &op2
->where
);
3684 /* Convert a logical operator to the corresponding bitwise intrinsic call.
3685 For example A .AND. B becomes IAND(A, B). */
3687 logical_to_bitwise (gfc_expr
*e
)
3689 gfc_expr
*tmp
, *op1
, *op2
;
3691 gfc_actual_arglist
*args
= NULL
;
3693 gcc_assert (e
->expr_type
== EXPR_OP
);
3695 isym
= GFC_ISYM_NONE
;
3696 op1
= e
->value
.op
.op1
;
3697 op2
= e
->value
.op
.op2
;
3699 switch (e
->value
.op
.op
)
3702 isym
= GFC_ISYM_NOT
;
3705 isym
= GFC_ISYM_IAND
;
3708 isym
= GFC_ISYM_IOR
;
3710 case INTRINSIC_NEQV
:
3711 isym
= GFC_ISYM_IEOR
;
3714 /* "Bitwise eqv" is just the complement of NEQV === IEOR.
3715 Change the old expression to NEQV, which will get replaced by IEOR,
3716 and wrap it in NOT. */
3717 tmp
= gfc_copy_expr (e
);
3718 tmp
->value
.op
.op
= INTRINSIC_NEQV
;
3719 tmp
= logical_to_bitwise (tmp
);
3720 isym
= GFC_ISYM_NOT
;
3725 gfc_internal_error ("logical_to_bitwise(): Bad intrinsic");
3728 /* Inherit the original operation's operands as arguments. */
3729 args
= gfc_get_actual_arglist ();
3733 args
->next
= gfc_get_actual_arglist ();
3734 args
->next
->expr
= op2
;
3737 /* Convert the expression to a function call. */
3738 e
->expr_type
= EXPR_FUNCTION
;
3739 e
->value
.function
.actual
= args
;
3740 e
->value
.function
.isym
= gfc_intrinsic_function_by_id (isym
);
3741 e
->value
.function
.name
= e
->value
.function
.isym
->name
;
3742 e
->value
.function
.esym
= NULL
;
3744 /* Make up a pre-resolved function call symtree if we need to. */
3745 if (!e
->symtree
|| !e
->symtree
->n
.sym
)
3748 gfc_get_ha_sym_tree (e
->value
.function
.isym
->name
, &e
->symtree
);
3749 sym
= e
->symtree
->n
.sym
;
3751 sym
->attr
.flavor
= FL_PROCEDURE
;
3752 sym
->attr
.function
= 1;
3753 sym
->attr
.elemental
= 1;
3755 sym
->attr
.referenced
= 1;
3756 gfc_intrinsic_symbol (sym
);
3757 gfc_commit_symbol (sym
);
3760 args
->name
= e
->value
.function
.isym
->formal
->name
;
3761 if (e
->value
.function
.isym
->formal
->next
)
3762 args
->next
->name
= e
->value
.function
.isym
->formal
->next
->name
;
3767 /* Recursively append candidate UOP to CANDIDATES. Store the number of
3768 candidates in CANDIDATES_LEN. */
3770 lookup_uop_fuzzy_find_candidates (gfc_symtree
*uop
,
3772 size_t &candidates_len
)
3779 /* Not sure how to properly filter here. Use all for a start.
3780 n.uop.op is NULL for empty interface operators (is that legal?) disregard
3781 these as i suppose they don't make terribly sense. */
3783 if (uop
->n
.uop
->op
!= NULL
)
3784 vec_push (candidates
, candidates_len
, uop
->name
);
3788 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3792 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3795 /* Lookup user-operator OP fuzzily, taking names in UOP into account. */
3798 lookup_uop_fuzzy (const char *op
, gfc_symtree
*uop
)
3800 char **candidates
= NULL
;
3801 size_t candidates_len
= 0;
3802 lookup_uop_fuzzy_find_candidates (uop
, candidates
, candidates_len
);
3803 return gfc_closest_fuzzy_match (op
, candidates
);
3807 /* Resolve an operator expression node. This can involve replacing the
3808 operation with a user defined function call. */
3811 resolve_operator (gfc_expr
*e
)
3813 gfc_expr
*op1
, *op2
;
3815 bool dual_locus_error
;
3818 /* Resolve all subnodes-- give them types. */
3820 switch (e
->value
.op
.op
)
3823 if (!gfc_resolve_expr (e
->value
.op
.op2
))
3829 case INTRINSIC_UPLUS
:
3830 case INTRINSIC_UMINUS
:
3831 case INTRINSIC_PARENTHESES
:
3832 if (!gfc_resolve_expr (e
->value
.op
.op1
))
3837 /* Typecheck the new node. */
3839 op1
= e
->value
.op
.op1
;
3840 op2
= e
->value
.op
.op2
;
3841 dual_locus_error
= false;
3843 if ((op1
&& op1
->expr_type
== EXPR_NULL
)
3844 || (op2
&& op2
->expr_type
== EXPR_NULL
))
3846 sprintf (msg
, _("Invalid context for NULL() pointer at %%L"));
3850 switch (e
->value
.op
.op
)
3852 case INTRINSIC_UPLUS
:
3853 case INTRINSIC_UMINUS
:
3854 if (op1
->ts
.type
== BT_INTEGER
3855 || op1
->ts
.type
== BT_REAL
3856 || op1
->ts
.type
== BT_COMPLEX
)
3862 sprintf (msg
, _("Operand of unary numeric operator %%<%s%%> at %%L is %s"),
3863 gfc_op2string (e
->value
.op
.op
), gfc_typename (&e
->ts
));
3866 case INTRINSIC_PLUS
:
3867 case INTRINSIC_MINUS
:
3868 case INTRINSIC_TIMES
:
3869 case INTRINSIC_DIVIDE
:
3870 case INTRINSIC_POWER
:
3871 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
3873 gfc_type_convert_binary (e
, 1);
3878 _("Operands of binary numeric operator %%<%s%%> at %%L are %s/%s"),
3879 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
3880 gfc_typename (&op2
->ts
));
3883 case INTRINSIC_CONCAT
:
3884 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
3885 && op1
->ts
.kind
== op2
->ts
.kind
)
3887 e
->ts
.type
= BT_CHARACTER
;
3888 e
->ts
.kind
= op1
->ts
.kind
;
3893 _("Operands of string concatenation operator at %%L are %s/%s"),
3894 gfc_typename (&op1
->ts
), gfc_typename (&op2
->ts
));
3900 case INTRINSIC_NEQV
:
3901 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
3903 e
->ts
.type
= BT_LOGICAL
;
3904 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
3905 if (op1
->ts
.kind
< e
->ts
.kind
)
3906 gfc_convert_type (op1
, &e
->ts
, 2);
3907 else if (op2
->ts
.kind
< e
->ts
.kind
)
3908 gfc_convert_type (op2
, &e
->ts
, 2);
3912 /* Logical ops on integers become bitwise ops with -fdec. */
3914 && (op1
->ts
.type
== BT_INTEGER
|| op2
->ts
.type
== BT_INTEGER
))
3916 e
->ts
.type
= BT_INTEGER
;
3917 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
3918 if (op1
->ts
.type
!= e
->ts
.type
|| op1
->ts
.kind
!= e
->ts
.kind
)
3919 gfc_convert_type (op1
, &e
->ts
, 1);
3920 if (op2
->ts
.type
!= e
->ts
.type
|| op2
->ts
.kind
!= e
->ts
.kind
)
3921 gfc_convert_type (op2
, &e
->ts
, 1);
3922 e
= logical_to_bitwise (e
);
3923 return resolve_function (e
);
3926 sprintf (msg
, _("Operands of logical operator %%<%s%%> at %%L are %s/%s"),
3927 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
3928 gfc_typename (&op2
->ts
));
3933 /* Logical ops on integers become bitwise ops with -fdec. */
3934 if (flag_dec
&& op1
->ts
.type
== BT_INTEGER
)
3936 e
->ts
.type
= BT_INTEGER
;
3937 e
->ts
.kind
= op1
->ts
.kind
;
3938 e
= logical_to_bitwise (e
);
3939 return resolve_function (e
);
3942 if (op1
->ts
.type
== BT_LOGICAL
)
3944 e
->ts
.type
= BT_LOGICAL
;
3945 e
->ts
.kind
= op1
->ts
.kind
;
3949 sprintf (msg
, _("Operand of .not. operator at %%L is %s"),
3950 gfc_typename (&op1
->ts
));
3954 case INTRINSIC_GT_OS
:
3956 case INTRINSIC_GE_OS
:
3958 case INTRINSIC_LT_OS
:
3960 case INTRINSIC_LE_OS
:
3961 if (op1
->ts
.type
== BT_COMPLEX
|| op2
->ts
.type
== BT_COMPLEX
)
3963 strcpy (msg
, _("COMPLEX quantities cannot be compared at %L"));
3970 case INTRINSIC_EQ_OS
:
3972 case INTRINSIC_NE_OS
:
3973 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
3974 && op1
->ts
.kind
== op2
->ts
.kind
)
3976 e
->ts
.type
= BT_LOGICAL
;
3977 e
->ts
.kind
= gfc_default_logical_kind
;
3981 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
3983 gfc_type_convert_binary (e
, 1);
3985 e
->ts
.type
= BT_LOGICAL
;
3986 e
->ts
.kind
= gfc_default_logical_kind
;
3988 if (warn_compare_reals
)
3990 gfc_intrinsic_op op
= e
->value
.op
.op
;
3992 /* Type conversion has made sure that the types of op1 and op2
3993 agree, so it is only necessary to check the first one. */
3994 if ((op1
->ts
.type
== BT_REAL
|| op1
->ts
.type
== BT_COMPLEX
)
3995 && (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
3996 || op
== INTRINSIC_NE
|| op
== INTRINSIC_NE_OS
))
4000 if (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
)
4001 msg
= "Equality comparison for %s at %L";
4003 msg
= "Inequality comparison for %s at %L";
4005 gfc_warning (OPT_Wcompare_reals
, msg
,
4006 gfc_typename (&op1
->ts
), &op1
->where
);
4013 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
4015 _("Logicals at %%L must be compared with %s instead of %s"),
4016 (e
->value
.op
.op
== INTRINSIC_EQ
4017 || e
->value
.op
.op
== INTRINSIC_EQ_OS
)
4018 ? ".eqv." : ".neqv.", gfc_op2string (e
->value
.op
.op
));
4021 _("Operands of comparison operator %%<%s%%> at %%L are %s/%s"),
4022 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
4023 gfc_typename (&op2
->ts
));
4027 case INTRINSIC_USER
:
4028 if (e
->value
.op
.uop
->op
== NULL
)
4030 const char *name
= e
->value
.op
.uop
->name
;
4031 const char *guessed
;
4032 guessed
= lookup_uop_fuzzy (name
, e
->value
.op
.uop
->ns
->uop_root
);
4034 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L; did you mean '%s'?"),
4037 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L"), name
);
4039 else if (op2
== NULL
)
4040 sprintf (msg
, _("Operand of user operator %%<%s%%> at %%L is %s"),
4041 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
));
4044 sprintf (msg
, _("Operands of user operator %%<%s%%> at %%L are %s/%s"),
4045 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
),
4046 gfc_typename (&op2
->ts
));
4047 e
->value
.op
.uop
->op
->sym
->attr
.referenced
= 1;
4052 case INTRINSIC_PARENTHESES
:
4054 if (e
->ts
.type
== BT_CHARACTER
)
4055 e
->ts
.u
.cl
= op1
->ts
.u
.cl
;
4059 gfc_internal_error ("resolve_operator(): Bad intrinsic");
4062 /* Deal with arrayness of an operand through an operator. */
4066 switch (e
->value
.op
.op
)
4068 case INTRINSIC_PLUS
:
4069 case INTRINSIC_MINUS
:
4070 case INTRINSIC_TIMES
:
4071 case INTRINSIC_DIVIDE
:
4072 case INTRINSIC_POWER
:
4073 case INTRINSIC_CONCAT
:
4077 case INTRINSIC_NEQV
:
4079 case INTRINSIC_EQ_OS
:
4081 case INTRINSIC_NE_OS
:
4083 case INTRINSIC_GT_OS
:
4085 case INTRINSIC_GE_OS
:
4087 case INTRINSIC_LT_OS
:
4089 case INTRINSIC_LE_OS
:
4091 if (op1
->rank
== 0 && op2
->rank
== 0)
4094 if (op1
->rank
== 0 && op2
->rank
!= 0)
4096 e
->rank
= op2
->rank
;
4098 if (e
->shape
== NULL
)
4099 e
->shape
= gfc_copy_shape (op2
->shape
, op2
->rank
);
4102 if (op1
->rank
!= 0 && op2
->rank
== 0)
4104 e
->rank
= op1
->rank
;
4106 if (e
->shape
== NULL
)
4107 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4110 if (op1
->rank
!= 0 && op2
->rank
!= 0)
4112 if (op1
->rank
== op2
->rank
)
4114 e
->rank
= op1
->rank
;
4115 if (e
->shape
== NULL
)
4117 t
= compare_shapes (op1
, op2
);
4121 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4126 /* Allow higher level expressions to work. */
4129 /* Try user-defined operators, and otherwise throw an error. */
4130 dual_locus_error
= true;
4132 _("Inconsistent ranks for operator at %%L and %%L"));
4139 case INTRINSIC_PARENTHESES
:
4141 case INTRINSIC_UPLUS
:
4142 case INTRINSIC_UMINUS
:
4143 /* Simply copy arrayness attribute */
4144 e
->rank
= op1
->rank
;
4146 if (e
->shape
== NULL
)
4147 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4155 /* Attempt to simplify the expression. */
4158 t
= gfc_simplify_expr (e
, 0);
4159 /* Some calls do not succeed in simplification and return false
4160 even though there is no error; e.g. variable references to
4161 PARAMETER arrays. */
4162 if (!gfc_is_constant_expr (e
))
4170 match m
= gfc_extend_expr (e
);
4173 if (m
== MATCH_ERROR
)
4177 if (dual_locus_error
)
4178 gfc_error (msg
, &op1
->where
, &op2
->where
);
4180 gfc_error (msg
, &e
->where
);
4186 /************** Array resolution subroutines **************/
4189 { CMP_LT
, CMP_EQ
, CMP_GT
, CMP_UNKNOWN
};
4191 /* Compare two integer expressions. */
4193 static compare_result
4194 compare_bound (gfc_expr
*a
, gfc_expr
*b
)
4198 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
4199 || b
== NULL
|| b
->expr_type
!= EXPR_CONSTANT
)
4202 /* If either of the types isn't INTEGER, we must have
4203 raised an error earlier. */
4205 if (a
->ts
.type
!= BT_INTEGER
|| b
->ts
.type
!= BT_INTEGER
)
4208 i
= mpz_cmp (a
->value
.integer
, b
->value
.integer
);
4218 /* Compare an integer expression with an integer. */
4220 static compare_result
4221 compare_bound_int (gfc_expr
*a
, int b
)
4225 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4228 if (a
->ts
.type
!= BT_INTEGER
)
4229 gfc_internal_error ("compare_bound_int(): Bad expression");
4231 i
= mpz_cmp_si (a
->value
.integer
, b
);
4241 /* Compare an integer expression with a mpz_t. */
4243 static compare_result
4244 compare_bound_mpz_t (gfc_expr
*a
, mpz_t b
)
4248 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4251 if (a
->ts
.type
!= BT_INTEGER
)
4252 gfc_internal_error ("compare_bound_int(): Bad expression");
4254 i
= mpz_cmp (a
->value
.integer
, b
);
4264 /* Compute the last value of a sequence given by a triplet.
4265 Return 0 if it wasn't able to compute the last value, or if the
4266 sequence if empty, and 1 otherwise. */
4269 compute_last_value_for_triplet (gfc_expr
*start
, gfc_expr
*end
,
4270 gfc_expr
*stride
, mpz_t last
)
4274 if (start
== NULL
|| start
->expr_type
!= EXPR_CONSTANT
4275 || end
== NULL
|| end
->expr_type
!= EXPR_CONSTANT
4276 || (stride
!= NULL
&& stride
->expr_type
!= EXPR_CONSTANT
))
4279 if (start
->ts
.type
!= BT_INTEGER
|| end
->ts
.type
!= BT_INTEGER
4280 || (stride
!= NULL
&& stride
->ts
.type
!= BT_INTEGER
))
4283 if (stride
== NULL
|| compare_bound_int (stride
, 1) == CMP_EQ
)
4285 if (compare_bound (start
, end
) == CMP_GT
)
4287 mpz_set (last
, end
->value
.integer
);
4291 if (compare_bound_int (stride
, 0) == CMP_GT
)
4293 /* Stride is positive */
4294 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) > 0)
4299 /* Stride is negative */
4300 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) < 0)
4305 mpz_sub (rem
, end
->value
.integer
, start
->value
.integer
);
4306 mpz_tdiv_r (rem
, rem
, stride
->value
.integer
);
4307 mpz_sub (last
, end
->value
.integer
, rem
);
4314 /* Compare a single dimension of an array reference to the array
4318 check_dimension (int i
, gfc_array_ref
*ar
, gfc_array_spec
*as
)
4322 if (ar
->dimen_type
[i
] == DIMEN_STAR
)
4324 gcc_assert (ar
->stride
[i
] == NULL
);
4325 /* This implies [*] as [*:] and [*:3] are not possible. */
4326 if (ar
->start
[i
] == NULL
)
4328 gcc_assert (ar
->end
[i
] == NULL
);
4333 /* Given start, end and stride values, calculate the minimum and
4334 maximum referenced indexes. */
4336 switch (ar
->dimen_type
[i
])
4339 case DIMEN_THIS_IMAGE
:
4344 if (compare_bound (ar
->start
[i
], as
->lower
[i
]) == CMP_LT
)
4347 gfc_warning (0, "Array reference at %L is out of bounds "
4348 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4349 mpz_get_si (ar
->start
[i
]->value
.integer
),
4350 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4352 gfc_warning (0, "Array reference at %L is out of bounds "
4353 "(%ld < %ld) in codimension %d", &ar
->c_where
[i
],
4354 mpz_get_si (ar
->start
[i
]->value
.integer
),
4355 mpz_get_si (as
->lower
[i
]->value
.integer
),
4359 if (compare_bound (ar
->start
[i
], as
->upper
[i
]) == CMP_GT
)
4362 gfc_warning (0, "Array reference at %L is out of bounds "
4363 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4364 mpz_get_si (ar
->start
[i
]->value
.integer
),
4365 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4367 gfc_warning (0, "Array reference at %L is out of bounds "
4368 "(%ld > %ld) in codimension %d", &ar
->c_where
[i
],
4369 mpz_get_si (ar
->start
[i
]->value
.integer
),
4370 mpz_get_si (as
->upper
[i
]->value
.integer
),
4379 #define AR_START (ar->start[i] ? ar->start[i] : as->lower[i])
4380 #define AR_END (ar->end[i] ? ar->end[i] : as->upper[i])
4382 compare_result comp_start_end
= compare_bound (AR_START
, AR_END
);
4384 /* Check for zero stride, which is not allowed. */
4385 if (compare_bound_int (ar
->stride
[i
], 0) == CMP_EQ
)
4387 gfc_error ("Illegal stride of zero at %L", &ar
->c_where
[i
]);
4391 /* if start == len || (stride > 0 && start < len)
4392 || (stride < 0 && start > len),
4393 then the array section contains at least one element. In this
4394 case, there is an out-of-bounds access if
4395 (start < lower || start > upper). */
4396 if (compare_bound (AR_START
, AR_END
) == CMP_EQ
4397 || ((compare_bound_int (ar
->stride
[i
], 0) == CMP_GT
4398 || ar
->stride
[i
] == NULL
) && comp_start_end
== CMP_LT
)
4399 || (compare_bound_int (ar
->stride
[i
], 0) == CMP_LT
4400 && comp_start_end
== CMP_GT
))
4402 if (compare_bound (AR_START
, as
->lower
[i
]) == CMP_LT
)
4404 gfc_warning (0, "Lower array reference at %L is out of bounds "
4405 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4406 mpz_get_si (AR_START
->value
.integer
),
4407 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4410 if (compare_bound (AR_START
, as
->upper
[i
]) == CMP_GT
)
4412 gfc_warning (0, "Lower array reference at %L is out of bounds "
4413 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4414 mpz_get_si (AR_START
->value
.integer
),
4415 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4420 /* If we can compute the highest index of the array section,
4421 then it also has to be between lower and upper. */
4422 mpz_init (last_value
);
4423 if (compute_last_value_for_triplet (AR_START
, AR_END
, ar
->stride
[i
],
4426 if (compare_bound_mpz_t (as
->lower
[i
], last_value
) == CMP_GT
)
4428 gfc_warning (0, "Upper array reference at %L is out of bounds "
4429 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4430 mpz_get_si (last_value
),
4431 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4432 mpz_clear (last_value
);
4435 if (compare_bound_mpz_t (as
->upper
[i
], last_value
) == CMP_LT
)
4437 gfc_warning (0, "Upper array reference at %L is out of bounds "
4438 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4439 mpz_get_si (last_value
),
4440 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4441 mpz_clear (last_value
);
4445 mpz_clear (last_value
);
4453 gfc_internal_error ("check_dimension(): Bad array reference");
4460 /* Compare an array reference with an array specification. */
4463 compare_spec_to_ref (gfc_array_ref
*ar
)
4470 /* TODO: Full array sections are only allowed as actual parameters. */
4471 if (as
->type
== AS_ASSUMED_SIZE
4472 && (/*ar->type == AR_FULL
4473 ||*/ (ar
->type
== AR_SECTION
4474 && ar
->dimen_type
[i
] == DIMEN_RANGE
&& ar
->end
[i
] == NULL
)))
4476 gfc_error ("Rightmost upper bound of assumed size array section "
4477 "not specified at %L", &ar
->where
);
4481 if (ar
->type
== AR_FULL
)
4484 if (as
->rank
!= ar
->dimen
)
4486 gfc_error ("Rank mismatch in array reference at %L (%d/%d)",
4487 &ar
->where
, ar
->dimen
, as
->rank
);
4491 /* ar->codimen == 0 is a local array. */
4492 if (as
->corank
!= ar
->codimen
&& ar
->codimen
!= 0)
4494 gfc_error ("Coindex rank mismatch in array reference at %L (%d/%d)",
4495 &ar
->where
, ar
->codimen
, as
->corank
);
4499 for (i
= 0; i
< as
->rank
; i
++)
4500 if (!check_dimension (i
, ar
, as
))
4503 /* Local access has no coarray spec. */
4504 if (ar
->codimen
!= 0)
4505 for (i
= as
->rank
; i
< as
->rank
+ as
->corank
; i
++)
4507 if (ar
->dimen_type
[i
] != DIMEN_ELEMENT
&& !ar
->in_allocate
4508 && ar
->dimen_type
[i
] != DIMEN_THIS_IMAGE
)
4510 gfc_error ("Coindex of codimension %d must be a scalar at %L",
4511 i
+ 1 - as
->rank
, &ar
->where
);
4514 if (!check_dimension (i
, ar
, as
))
4522 /* Resolve one part of an array index. */
4525 gfc_resolve_index_1 (gfc_expr
*index
, int check_scalar
,
4526 int force_index_integer_kind
)
4533 if (!gfc_resolve_expr (index
))
4536 if (check_scalar
&& index
->rank
!= 0)
4538 gfc_error ("Array index at %L must be scalar", &index
->where
);
4542 if (index
->ts
.type
!= BT_INTEGER
&& index
->ts
.type
!= BT_REAL
)
4544 gfc_error ("Array index at %L must be of INTEGER type, found %s",
4545 &index
->where
, gfc_basic_typename (index
->ts
.type
));
4549 if (index
->ts
.type
== BT_REAL
)
4550 if (!gfc_notify_std (GFC_STD_LEGACY
, "REAL array index at %L",
4554 if ((index
->ts
.kind
!= gfc_index_integer_kind
4555 && force_index_integer_kind
)
4556 || index
->ts
.type
!= BT_INTEGER
)
4559 ts
.type
= BT_INTEGER
;
4560 ts
.kind
= gfc_index_integer_kind
;
4562 gfc_convert_type_warn (index
, &ts
, 2, 0);
4568 /* Resolve one part of an array index. */
4571 gfc_resolve_index (gfc_expr
*index
, int check_scalar
)
4573 return gfc_resolve_index_1 (index
, check_scalar
, 1);
4576 /* Resolve a dim argument to an intrinsic function. */
4579 gfc_resolve_dim_arg (gfc_expr
*dim
)
4584 if (!gfc_resolve_expr (dim
))
4589 gfc_error ("Argument dim at %L must be scalar", &dim
->where
);
4594 if (dim
->ts
.type
!= BT_INTEGER
)
4596 gfc_error ("Argument dim at %L must be of INTEGER type", &dim
->where
);
4600 if (dim
->ts
.kind
!= gfc_index_integer_kind
)
4605 ts
.type
= BT_INTEGER
;
4606 ts
.kind
= gfc_index_integer_kind
;
4608 gfc_convert_type_warn (dim
, &ts
, 2, 0);
4614 /* Given an expression that contains array references, update those array
4615 references to point to the right array specifications. While this is
4616 filled in during matching, this information is difficult to save and load
4617 in a module, so we take care of it here.
4619 The idea here is that the original array reference comes from the
4620 base symbol. We traverse the list of reference structures, setting
4621 the stored reference to references. Component references can
4622 provide an additional array specification. */
4625 find_array_spec (gfc_expr
*e
)
4631 if (e
->symtree
->n
.sym
->ts
.type
== BT_CLASS
)
4632 as
= CLASS_DATA (e
->symtree
->n
.sym
)->as
;
4634 as
= e
->symtree
->n
.sym
->as
;
4636 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4641 gfc_internal_error ("find_array_spec(): Missing spec");
4648 c
= ref
->u
.c
.component
;
4649 if (c
->attr
.dimension
)
4652 gfc_internal_error ("find_array_spec(): unused as(1)");
4663 gfc_internal_error ("find_array_spec(): unused as(2)");
4667 /* Resolve an array reference. */
4670 resolve_array_ref (gfc_array_ref
*ar
)
4672 int i
, check_scalar
;
4675 for (i
= 0; i
< ar
->dimen
+ ar
->codimen
; i
++)
4677 check_scalar
= ar
->dimen_type
[i
] == DIMEN_RANGE
;
4679 /* Do not force gfc_index_integer_kind for the start. We can
4680 do fine with any integer kind. This avoids temporary arrays
4681 created for indexing with a vector. */
4682 if (!gfc_resolve_index_1 (ar
->start
[i
], check_scalar
, 0))
4684 if (!gfc_resolve_index (ar
->end
[i
], check_scalar
))
4686 if (!gfc_resolve_index (ar
->stride
[i
], check_scalar
))
4691 if (ar
->dimen_type
[i
] == DIMEN_UNKNOWN
)
4695 ar
->dimen_type
[i
] = DIMEN_ELEMENT
;
4699 ar
->dimen_type
[i
] = DIMEN_VECTOR
;
4700 if (e
->expr_type
== EXPR_VARIABLE
4701 && e
->symtree
->n
.sym
->ts
.type
== BT_DERIVED
)
4702 ar
->start
[i
] = gfc_get_parentheses (e
);
4706 gfc_error ("Array index at %L is an array of rank %d",
4707 &ar
->c_where
[i
], e
->rank
);
4711 /* Fill in the upper bound, which may be lower than the
4712 specified one for something like a(2:10:5), which is
4713 identical to a(2:7:5). Only relevant for strides not equal
4714 to one. Don't try a division by zero. */
4715 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4716 && ar
->stride
[i
] != NULL
&& ar
->stride
[i
]->expr_type
== EXPR_CONSTANT
4717 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 1L) != 0
4718 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 0L) != 0)
4722 if (gfc_ref_dimen_size (ar
, i
, &size
, &end
))
4724 if (ar
->end
[i
] == NULL
)
4727 gfc_get_constant_expr (BT_INTEGER
, gfc_index_integer_kind
,
4729 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4731 else if (ar
->end
[i
]->ts
.type
== BT_INTEGER
4732 && ar
->end
[i
]->expr_type
== EXPR_CONSTANT
)
4734 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4745 if (ar
->type
== AR_FULL
)
4747 if (ar
->as
->rank
== 0)
4748 ar
->type
= AR_ELEMENT
;
4750 /* Make sure array is the same as array(:,:), this way
4751 we don't need to special case all the time. */
4752 ar
->dimen
= ar
->as
->rank
;
4753 for (i
= 0; i
< ar
->dimen
; i
++)
4755 ar
->dimen_type
[i
] = DIMEN_RANGE
;
4757 gcc_assert (ar
->start
[i
] == NULL
);
4758 gcc_assert (ar
->end
[i
] == NULL
);
4759 gcc_assert (ar
->stride
[i
] == NULL
);
4763 /* If the reference type is unknown, figure out what kind it is. */
4765 if (ar
->type
== AR_UNKNOWN
)
4767 ar
->type
= AR_ELEMENT
;
4768 for (i
= 0; i
< ar
->dimen
; i
++)
4769 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4770 || ar
->dimen_type
[i
] == DIMEN_VECTOR
)
4772 ar
->type
= AR_SECTION
;
4777 if (!ar
->as
->cray_pointee
&& !compare_spec_to_ref (ar
))
4780 if (ar
->as
->corank
&& ar
->codimen
== 0)
4783 ar
->codimen
= ar
->as
->corank
;
4784 for (n
= ar
->dimen
; n
< ar
->dimen
+ ar
->codimen
; n
++)
4785 ar
->dimen_type
[n
] = DIMEN_THIS_IMAGE
;
4793 resolve_substring (gfc_ref
*ref
)
4795 int k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
4797 if (ref
->u
.ss
.start
!= NULL
)
4799 if (!gfc_resolve_expr (ref
->u
.ss
.start
))
4802 if (ref
->u
.ss
.start
->ts
.type
!= BT_INTEGER
)
4804 gfc_error ("Substring start index at %L must be of type INTEGER",
4805 &ref
->u
.ss
.start
->where
);
4809 if (ref
->u
.ss
.start
->rank
!= 0)
4811 gfc_error ("Substring start index at %L must be scalar",
4812 &ref
->u
.ss
.start
->where
);
4816 if (compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_LT
4817 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4818 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4820 gfc_error ("Substring start index at %L is less than one",
4821 &ref
->u
.ss
.start
->where
);
4826 if (ref
->u
.ss
.end
!= NULL
)
4828 if (!gfc_resolve_expr (ref
->u
.ss
.end
))
4831 if (ref
->u
.ss
.end
->ts
.type
!= BT_INTEGER
)
4833 gfc_error ("Substring end index at %L must be of type INTEGER",
4834 &ref
->u
.ss
.end
->where
);
4838 if (ref
->u
.ss
.end
->rank
!= 0)
4840 gfc_error ("Substring end index at %L must be scalar",
4841 &ref
->u
.ss
.end
->where
);
4845 if (ref
->u
.ss
.length
!= NULL
4846 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_GT
4847 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4848 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4850 gfc_error ("Substring end index at %L exceeds the string length",
4851 &ref
->u
.ss
.start
->where
);
4855 if (compare_bound_mpz_t (ref
->u
.ss
.end
,
4856 gfc_integer_kinds
[k
].huge
) == CMP_GT
4857 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4858 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4860 gfc_error ("Substring end index at %L is too large",
4861 &ref
->u
.ss
.end
->where
);
4870 /* This function supplies missing substring charlens. */
4873 gfc_resolve_substring_charlen (gfc_expr
*e
)
4876 gfc_expr
*start
, *end
;
4877 gfc_typespec
*ts
= NULL
;
4879 for (char_ref
= e
->ref
; char_ref
; char_ref
= char_ref
->next
)
4881 if (char_ref
->type
== REF_SUBSTRING
)
4883 if (char_ref
->type
== REF_COMPONENT
)
4884 ts
= &char_ref
->u
.c
.component
->ts
;
4890 gcc_assert (char_ref
->next
== NULL
);
4894 if (e
->ts
.u
.cl
->length
)
4895 gfc_free_expr (e
->ts
.u
.cl
->length
);
4896 else if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
->attr
.dummy
)
4900 e
->ts
.type
= BT_CHARACTER
;
4901 e
->ts
.kind
= gfc_default_character_kind
;
4904 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
4906 if (char_ref
->u
.ss
.start
)
4907 start
= gfc_copy_expr (char_ref
->u
.ss
.start
);
4909 start
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 1);
4911 if (char_ref
->u
.ss
.end
)
4912 end
= gfc_copy_expr (char_ref
->u
.ss
.end
);
4913 else if (e
->expr_type
== EXPR_VARIABLE
)
4916 ts
= &e
->symtree
->n
.sym
->ts
;
4917 end
= gfc_copy_expr (ts
->u
.cl
->length
);
4924 gfc_free_expr (start
);
4925 gfc_free_expr (end
);
4929 /* Length = (end - start + 1). */
4930 e
->ts
.u
.cl
->length
= gfc_subtract (end
, start
);
4931 e
->ts
.u
.cl
->length
= gfc_add (e
->ts
.u
.cl
->length
,
4932 gfc_get_int_expr (gfc_charlen_int_kind
,
4935 /* F2008, 6.4.1: Both the starting point and the ending point shall
4936 be within the range 1, 2, ..., n unless the starting point exceeds
4937 the ending point, in which case the substring has length zero. */
4939 if (mpz_cmp_si (e
->ts
.u
.cl
->length
->value
.integer
, 0) < 0)
4940 mpz_set_si (e
->ts
.u
.cl
->length
->value
.integer
, 0);
4942 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
4943 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
4945 /* Make sure that the length is simplified. */
4946 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 1);
4947 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
4951 /* Resolve subtype references. */
4954 resolve_ref (gfc_expr
*expr
)
4956 int current_part_dimension
, n_components
, seen_part_dimension
;
4959 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
4960 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.as
== NULL
)
4962 find_array_spec (expr
);
4966 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
4970 if (!resolve_array_ref (&ref
->u
.ar
))
4978 if (!resolve_substring (ref
))
4983 /* Check constraints on part references. */
4985 current_part_dimension
= 0;
4986 seen_part_dimension
= 0;
4989 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
4994 switch (ref
->u
.ar
.type
)
4997 /* Coarray scalar. */
4998 if (ref
->u
.ar
.as
->rank
== 0)
5000 current_part_dimension
= 0;
5005 current_part_dimension
= 1;
5009 current_part_dimension
= 0;
5013 gfc_internal_error ("resolve_ref(): Bad array reference");
5019 if (current_part_dimension
|| seen_part_dimension
)
5022 if (ref
->u
.c
.component
->attr
.pointer
5023 || ref
->u
.c
.component
->attr
.proc_pointer
5024 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5025 && CLASS_DATA (ref
->u
.c
.component
)->attr
.pointer
))
5027 gfc_error ("Component to the right of a part reference "
5028 "with nonzero rank must not have the POINTER "
5029 "attribute at %L", &expr
->where
);
5032 else if (ref
->u
.c
.component
->attr
.allocatable
5033 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5034 && CLASS_DATA (ref
->u
.c
.component
)->attr
.allocatable
))
5037 gfc_error ("Component to the right of a part reference "
5038 "with nonzero rank must not have the ALLOCATABLE "
5039 "attribute at %L", &expr
->where
);
5051 if (((ref
->type
== REF_COMPONENT
&& n_components
> 1)
5052 || ref
->next
== NULL
)
5053 && current_part_dimension
5054 && seen_part_dimension
)
5056 gfc_error ("Two or more part references with nonzero rank must "
5057 "not be specified at %L", &expr
->where
);
5061 if (ref
->type
== REF_COMPONENT
)
5063 if (current_part_dimension
)
5064 seen_part_dimension
= 1;
5066 /* reset to make sure */
5067 current_part_dimension
= 0;
5075 /* Given an expression, determine its shape. This is easier than it sounds.
5076 Leaves the shape array NULL if it is not possible to determine the shape. */
5079 expression_shape (gfc_expr
*e
)
5081 mpz_t array
[GFC_MAX_DIMENSIONS
];
5084 if (e
->rank
<= 0 || e
->shape
!= NULL
)
5087 for (i
= 0; i
< e
->rank
; i
++)
5088 if (!gfc_array_dimen_size (e
, i
, &array
[i
]))
5091 e
->shape
= gfc_get_shape (e
->rank
);
5093 memcpy (e
->shape
, array
, e
->rank
* sizeof (mpz_t
));
5098 for (i
--; i
>= 0; i
--)
5099 mpz_clear (array
[i
]);
5103 /* Given a variable expression node, compute the rank of the expression by
5104 examining the base symbol and any reference structures it may have. */
5107 expression_rank (gfc_expr
*e
)
5112 /* Just to make sure, because EXPR_COMPCALL's also have an e->ref and that
5113 could lead to serious confusion... */
5114 gcc_assert (e
->expr_type
!= EXPR_COMPCALL
);
5118 if (e
->expr_type
== EXPR_ARRAY
)
5120 /* Constructors can have a rank different from one via RESHAPE(). */
5122 if (e
->symtree
== NULL
)
5128 e
->rank
= (e
->symtree
->n
.sym
->as
== NULL
)
5129 ? 0 : e
->symtree
->n
.sym
->as
->rank
;
5135 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5137 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.proc_pointer
5138 && ref
->u
.c
.component
->attr
.function
&& !ref
->next
)
5139 rank
= ref
->u
.c
.component
->as
? ref
->u
.c
.component
->as
->rank
: 0;
5141 if (ref
->type
!= REF_ARRAY
)
5144 if (ref
->u
.ar
.type
== AR_FULL
)
5146 rank
= ref
->u
.ar
.as
->rank
;
5150 if (ref
->u
.ar
.type
== AR_SECTION
)
5152 /* Figure out the rank of the section. */
5154 gfc_internal_error ("expression_rank(): Two array specs");
5156 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
5157 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_RANGE
5158 || ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
)
5168 expression_shape (e
);
5173 add_caf_get_intrinsic (gfc_expr
*e
)
5175 gfc_expr
*wrapper
, *tmp_expr
;
5179 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5180 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5185 for (n
= ref
->u
.ar
.dimen
; n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
5186 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_ELEMENT
)
5189 tmp_expr
= XCNEW (gfc_expr
);
5191 wrapper
= gfc_build_intrinsic_call (gfc_current_ns
, GFC_ISYM_CAF_GET
,
5192 "caf_get", tmp_expr
->where
, 1, tmp_expr
);
5193 wrapper
->ts
= e
->ts
;
5194 wrapper
->rank
= e
->rank
;
5196 wrapper
->shape
= gfc_copy_shape (e
->shape
, e
->rank
);
5203 remove_caf_get_intrinsic (gfc_expr
*e
)
5205 gcc_assert (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
5206 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
);
5207 gfc_expr
*e2
= e
->value
.function
.actual
->expr
;
5208 e
->value
.function
.actual
->expr
= NULL
;
5209 gfc_free_actual_arglist (e
->value
.function
.actual
);
5210 gfc_free_shape (&e
->shape
, e
->rank
);
5216 /* Resolve a variable expression. */
5219 resolve_variable (gfc_expr
*e
)
5226 if (e
->symtree
== NULL
)
5228 sym
= e
->symtree
->n
.sym
;
5230 /* Use same check as for TYPE(*) below; this check has to be before TYPE(*)
5231 as ts.type is set to BT_ASSUMED in resolve_symbol. */
5232 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
5234 if (!actual_arg
|| inquiry_argument
)
5236 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may only "
5237 "be used as actual argument", sym
->name
, &e
->where
);
5241 /* TS 29113, 407b. */
5242 else if (e
->ts
.type
== BT_ASSUMED
)
5246 gfc_error ("Assumed-type variable %s at %L may only be used "
5247 "as actual argument", sym
->name
, &e
->where
);
5250 else if (inquiry_argument
&& !first_actual_arg
)
5252 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5253 for all inquiry functions in resolve_function; the reason is
5254 that the function-name resolution happens too late in that
5256 gfc_error ("Assumed-type variable %s at %L as actual argument to "
5257 "an inquiry function shall be the first argument",
5258 sym
->name
, &e
->where
);
5262 /* TS 29113, C535b. */
5263 else if ((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5264 && CLASS_DATA (sym
)->as
5265 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5266 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5267 && sym
->as
->type
== AS_ASSUMED_RANK
))
5271 gfc_error ("Assumed-rank variable %s at %L may only be used as "
5272 "actual argument", sym
->name
, &e
->where
);
5275 else if (inquiry_argument
&& !first_actual_arg
)
5277 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5278 for all inquiry functions in resolve_function; the reason is
5279 that the function-name resolution happens too late in that
5281 gfc_error ("Assumed-rank variable %s at %L as actual argument "
5282 "to an inquiry function shall be the first argument",
5283 sym
->name
, &e
->where
);
5288 if ((sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
)) && e
->ref
5289 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5290 && e
->ref
->next
== NULL
))
5292 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall not have "
5293 "a subobject reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5296 /* TS 29113, 407b. */
5297 else if (e
->ts
.type
== BT_ASSUMED
&& e
->ref
5298 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5299 && e
->ref
->next
== NULL
))
5301 gfc_error ("Assumed-type variable %s at %L shall not have a subobject "
5302 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5306 /* TS 29113, C535b. */
5307 if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5308 && CLASS_DATA (sym
)->as
5309 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5310 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5311 && sym
->as
->type
== AS_ASSUMED_RANK
))
5313 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5314 && e
->ref
->next
== NULL
))
5316 gfc_error ("Assumed-rank variable %s at %L shall not have a subobject "
5317 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5321 /* For variables that are used in an associate (target => object) where
5322 the object's basetype is array valued while the target is scalar,
5323 the ts' type of the component refs is still array valued, which
5324 can't be translated that way. */
5325 if (sym
->assoc
&& e
->rank
== 0 && e
->ref
&& sym
->ts
.type
== BT_CLASS
5326 && sym
->assoc
->target
->ts
.type
== BT_CLASS
5327 && CLASS_DATA (sym
->assoc
->target
)->as
)
5329 gfc_ref
*ref
= e
->ref
;
5335 ref
->u
.c
.sym
= sym
->ts
.u
.derived
;
5336 /* Stop the loop. */
5346 /* If this is an associate-name, it may be parsed with an array reference
5347 in error even though the target is scalar. Fail directly in this case.
5348 TODO Understand why class scalar expressions must be excluded. */
5349 if (sym
->assoc
&& !(sym
->ts
.type
== BT_CLASS
&& e
->rank
== 0))
5351 if (sym
->ts
.type
== BT_CLASS
)
5352 gfc_fix_class_refs (e
);
5353 if (!sym
->attr
.dimension
&& e
->ref
&& e
->ref
->type
== REF_ARRAY
)
5357 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.generic
)
5358 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
5360 /* On the other hand, the parser may not have known this is an array;
5361 in this case, we have to add a FULL reference. */
5362 if (sym
->assoc
&& sym
->attr
.dimension
&& !e
->ref
)
5364 e
->ref
= gfc_get_ref ();
5365 e
->ref
->type
= REF_ARRAY
;
5366 e
->ref
->u
.ar
.type
= AR_FULL
;
5367 e
->ref
->u
.ar
.dimen
= 0;
5370 /* Like above, but for class types, where the checking whether an array
5371 ref is present is more complicated. Furthermore make sure not to add
5372 the full array ref to _vptr or _len refs. */
5373 if (sym
->assoc
&& sym
->ts
.type
== BT_CLASS
5374 && CLASS_DATA (sym
)->attr
.dimension
5375 && (e
->ts
.type
!= BT_DERIVED
|| !e
->ts
.u
.derived
->attr
.vtype
))
5377 gfc_ref
*ref
, *newref
;
5379 newref
= gfc_get_ref ();
5380 newref
->type
= REF_ARRAY
;
5381 newref
->u
.ar
.type
= AR_FULL
;
5382 newref
->u
.ar
.dimen
= 0;
5383 /* Because this is an associate var and the first ref either is a ref to
5384 the _data component or not, no traversal of the ref chain is
5385 needed. The array ref needs to be inserted after the _data ref,
5386 or when that is not present, which may happend for polymorphic
5387 types, then at the first position. */
5391 else if (ref
->type
== REF_COMPONENT
5392 && strcmp ("_data", ref
->u
.c
.component
->name
) == 0)
5394 if (!ref
->next
|| ref
->next
->type
!= REF_ARRAY
)
5396 newref
->next
= ref
->next
;
5400 /* Array ref present already. */
5401 gfc_free_ref_list (newref
);
5403 else if (ref
->type
== REF_ARRAY
)
5404 /* Array ref present already. */
5405 gfc_free_ref_list (newref
);
5413 if (e
->ref
&& !resolve_ref (e
))
5416 if (sym
->attr
.flavor
== FL_PROCEDURE
5417 && (!sym
->attr
.function
5418 || (sym
->attr
.function
&& sym
->result
5419 && sym
->result
->attr
.proc_pointer
5420 && !sym
->result
->attr
.function
)))
5422 e
->ts
.type
= BT_PROCEDURE
;
5423 goto resolve_procedure
;
5426 if (sym
->ts
.type
!= BT_UNKNOWN
)
5427 gfc_variable_attr (e
, &e
->ts
);
5428 else if (sym
->attr
.flavor
== FL_PROCEDURE
5429 && sym
->attr
.function
&& sym
->result
5430 && sym
->result
->ts
.type
!= BT_UNKNOWN
5431 && sym
->result
->attr
.proc_pointer
)
5432 e
->ts
= sym
->result
->ts
;
5435 /* Must be a simple variable reference. */
5436 if (!gfc_set_default_type (sym
, 1, sym
->ns
))
5441 if (check_assumed_size_reference (sym
, e
))
5444 /* Deal with forward references to entries during gfc_resolve_code, to
5445 satisfy, at least partially, 12.5.2.5. */
5446 if (gfc_current_ns
->entries
5447 && current_entry_id
== sym
->entry_id
5450 && cs_base
->current
->op
!= EXEC_ENTRY
)
5452 gfc_entry_list
*entry
;
5453 gfc_formal_arglist
*formal
;
5455 bool seen
, saved_specification_expr
;
5457 /* If the symbol is a dummy... */
5458 if (sym
->attr
.dummy
&& sym
->ns
== gfc_current_ns
)
5460 entry
= gfc_current_ns
->entries
;
5463 /* ...test if the symbol is a parameter of previous entries. */
5464 for (; entry
&& entry
->id
<= current_entry_id
; entry
= entry
->next
)
5465 for (formal
= entry
->sym
->formal
; formal
; formal
= formal
->next
)
5467 if (formal
->sym
&& sym
->name
== formal
->sym
->name
)
5474 /* If it has not been seen as a dummy, this is an error. */
5477 if (specification_expr
)
5478 gfc_error ("Variable %qs, used in a specification expression"
5479 ", is referenced at %L before the ENTRY statement "
5480 "in which it is a parameter",
5481 sym
->name
, &cs_base
->current
->loc
);
5483 gfc_error ("Variable %qs is used at %L before the ENTRY "
5484 "statement in which it is a parameter",
5485 sym
->name
, &cs_base
->current
->loc
);
5490 /* Now do the same check on the specification expressions. */
5491 saved_specification_expr
= specification_expr
;
5492 specification_expr
= true;
5493 if (sym
->ts
.type
== BT_CHARACTER
5494 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
5498 for (n
= 0; n
< sym
->as
->rank
; n
++)
5500 if (!gfc_resolve_expr (sym
->as
->lower
[n
]))
5502 if (!gfc_resolve_expr (sym
->as
->upper
[n
]))
5505 specification_expr
= saved_specification_expr
;
5508 /* Update the symbol's entry level. */
5509 sym
->entry_id
= current_entry_id
+ 1;
5512 /* If a symbol has been host_associated mark it. This is used latter,
5513 to identify if aliasing is possible via host association. */
5514 if (sym
->attr
.flavor
== FL_VARIABLE
5515 && gfc_current_ns
->parent
5516 && (gfc_current_ns
->parent
== sym
->ns
5517 || (gfc_current_ns
->parent
->parent
5518 && gfc_current_ns
->parent
->parent
== sym
->ns
)))
5519 sym
->attr
.host_assoc
= 1;
5521 if (gfc_current_ns
->proc_name
5522 && sym
->attr
.dimension
5523 && (sym
->ns
!= gfc_current_ns
5524 || sym
->attr
.use_assoc
5525 || sym
->attr
.in_common
))
5526 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
5529 if (t
&& !resolve_procedure_expression (e
))
5532 /* F2008, C617 and C1229. */
5533 if (!inquiry_argument
&& (e
->ts
.type
== BT_CLASS
|| e
->ts
.type
== BT_DERIVED
)
5534 && gfc_is_coindexed (e
))
5536 gfc_ref
*ref
, *ref2
= NULL
;
5538 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5540 if (ref
->type
== REF_COMPONENT
)
5542 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5546 for ( ; ref
; ref
= ref
->next
)
5547 if (ref
->type
== REF_COMPONENT
)
5550 /* Expression itself is not coindexed object. */
5551 if (ref
&& e
->ts
.type
== BT_CLASS
)
5553 gfc_error ("Polymorphic subobject of coindexed object at %L",
5558 /* Expression itself is coindexed object. */
5562 c
= ref2
? ref2
->u
.c
.component
: e
->symtree
->n
.sym
->components
;
5563 for ( ; c
; c
= c
->next
)
5564 if (c
->attr
.allocatable
&& c
->ts
.type
== BT_CLASS
)
5566 gfc_error ("Coindexed object with polymorphic allocatable "
5567 "subcomponent at %L", &e
->where
);
5575 expression_rank (e
);
5577 if (t
&& flag_coarray
== GFC_FCOARRAY_LIB
&& gfc_is_coindexed (e
))
5578 add_caf_get_intrinsic (e
);
5580 /* Simplify cases where access to a parameter array results in a
5581 single constant. Suppress errors since those will have been
5582 issued before, as warnings. */
5583 if (e
->rank
== 0 && sym
->as
&& sym
->attr
.flavor
== FL_PARAMETER
)
5585 gfc_push_suppress_errors ();
5586 gfc_simplify_expr (e
, 1);
5587 gfc_pop_suppress_errors ();
5594 /* Checks to see that the correct symbol has been host associated.
5595 The only situation where this arises is that in which a twice
5596 contained function is parsed after the host association is made.
5597 Therefore, on detecting this, change the symbol in the expression
5598 and convert the array reference into an actual arglist if the old
5599 symbol is a variable. */
5601 check_host_association (gfc_expr
*e
)
5603 gfc_symbol
*sym
, *old_sym
;
5607 gfc_actual_arglist
*arg
, *tail
= NULL
;
5608 bool retval
= e
->expr_type
== EXPR_FUNCTION
;
5610 /* If the expression is the result of substitution in
5611 interface.c(gfc_extend_expr) because there is no way in
5612 which the host association can be wrong. */
5613 if (e
->symtree
== NULL
5614 || e
->symtree
->n
.sym
== NULL
5615 || e
->user_operator
)
5618 old_sym
= e
->symtree
->n
.sym
;
5620 if (gfc_current_ns
->parent
5621 && old_sym
->ns
!= gfc_current_ns
)
5623 /* Use the 'USE' name so that renamed module symbols are
5624 correctly handled. */
5625 gfc_find_symbol (e
->symtree
->name
, gfc_current_ns
, 1, &sym
);
5627 if (sym
&& old_sym
!= sym
5628 && sym
->ts
.type
== old_sym
->ts
.type
5629 && sym
->attr
.flavor
== FL_PROCEDURE
5630 && sym
->attr
.contained
)
5632 /* Clear the shape, since it might not be valid. */
5633 gfc_free_shape (&e
->shape
, e
->rank
);
5635 /* Give the expression the right symtree! */
5636 gfc_find_sym_tree (e
->symtree
->name
, NULL
, 1, &st
);
5637 gcc_assert (st
!= NULL
);
5639 if (old_sym
->attr
.flavor
== FL_PROCEDURE
5640 || e
->expr_type
== EXPR_FUNCTION
)
5642 /* Original was function so point to the new symbol, since
5643 the actual argument list is already attached to the
5645 e
->value
.function
.esym
= NULL
;
5650 /* Original was variable so convert array references into
5651 an actual arglist. This does not need any checking now
5652 since resolve_function will take care of it. */
5653 e
->value
.function
.actual
= NULL
;
5654 e
->expr_type
= EXPR_FUNCTION
;
5657 /* Ambiguity will not arise if the array reference is not
5658 the last reference. */
5659 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5660 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
5663 gcc_assert (ref
->type
== REF_ARRAY
);
5665 /* Grab the start expressions from the array ref and
5666 copy them into actual arguments. */
5667 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
5669 arg
= gfc_get_actual_arglist ();
5670 arg
->expr
= gfc_copy_expr (ref
->u
.ar
.start
[n
]);
5671 if (e
->value
.function
.actual
== NULL
)
5672 tail
= e
->value
.function
.actual
= arg
;
5680 /* Dump the reference list and set the rank. */
5681 gfc_free_ref_list (e
->ref
);
5683 e
->rank
= sym
->as
? sym
->as
->rank
: 0;
5686 gfc_resolve_expr (e
);
5690 /* This might have changed! */
5691 return e
->expr_type
== EXPR_FUNCTION
;
5696 gfc_resolve_character_operator (gfc_expr
*e
)
5698 gfc_expr
*op1
= e
->value
.op
.op1
;
5699 gfc_expr
*op2
= e
->value
.op
.op2
;
5700 gfc_expr
*e1
= NULL
;
5701 gfc_expr
*e2
= NULL
;
5703 gcc_assert (e
->value
.op
.op
== INTRINSIC_CONCAT
);
5705 if (op1
->ts
.u
.cl
&& op1
->ts
.u
.cl
->length
)
5706 e1
= gfc_copy_expr (op1
->ts
.u
.cl
->length
);
5707 else if (op1
->expr_type
== EXPR_CONSTANT
)
5708 e1
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5709 op1
->value
.character
.length
);
5711 if (op2
->ts
.u
.cl
&& op2
->ts
.u
.cl
->length
)
5712 e2
= gfc_copy_expr (op2
->ts
.u
.cl
->length
);
5713 else if (op2
->expr_type
== EXPR_CONSTANT
)
5714 e2
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5715 op2
->value
.character
.length
);
5717 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5727 e
->ts
.u
.cl
->length
= gfc_add (e1
, e2
);
5728 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5729 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5730 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 0);
5731 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5737 /* Ensure that an character expression has a charlen and, if possible, a
5738 length expression. */
5741 fixup_charlen (gfc_expr
*e
)
5743 /* The cases fall through so that changes in expression type and the need
5744 for multiple fixes are picked up. In all circumstances, a charlen should
5745 be available for the middle end to hang a backend_decl on. */
5746 switch (e
->expr_type
)
5749 gfc_resolve_character_operator (e
);
5753 if (e
->expr_type
== EXPR_ARRAY
)
5754 gfc_resolve_character_array_constructor (e
);
5757 case EXPR_SUBSTRING
:
5758 if (!e
->ts
.u
.cl
&& e
->ref
)
5759 gfc_resolve_substring_charlen (e
);
5764 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5771 /* Update an actual argument to include the passed-object for type-bound
5772 procedures at the right position. */
5774 static gfc_actual_arglist
*
5775 update_arglist_pass (gfc_actual_arglist
* lst
, gfc_expr
* po
, unsigned argpos
,
5778 gcc_assert (argpos
> 0);
5782 gfc_actual_arglist
* result
;
5784 result
= gfc_get_actual_arglist ();
5788 result
->name
= name
;
5794 lst
->next
= update_arglist_pass (lst
->next
, po
, argpos
- 1, name
);
5796 lst
= update_arglist_pass (NULL
, po
, argpos
- 1, name
);
5801 /* Extract the passed-object from an EXPR_COMPCALL (a copy of it). */
5804 extract_compcall_passed_object (gfc_expr
* e
)
5808 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
5810 if (e
->value
.compcall
.base_object
)
5811 po
= gfc_copy_expr (e
->value
.compcall
.base_object
);
5814 po
= gfc_get_expr ();
5815 po
->expr_type
= EXPR_VARIABLE
;
5816 po
->symtree
= e
->symtree
;
5817 po
->ref
= gfc_copy_ref (e
->ref
);
5818 po
->where
= e
->where
;
5821 if (!gfc_resolve_expr (po
))
5828 /* Update the arglist of an EXPR_COMPCALL expression to include the
5832 update_compcall_arglist (gfc_expr
* e
)
5835 gfc_typebound_proc
* tbp
;
5837 tbp
= e
->value
.compcall
.tbp
;
5842 po
= extract_compcall_passed_object (e
);
5846 if (tbp
->nopass
|| e
->value
.compcall
.ignore_pass
)
5852 if (tbp
->pass_arg_num
<= 0)
5855 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
5863 /* Extract the passed object from a PPC call (a copy of it). */
5866 extract_ppc_passed_object (gfc_expr
*e
)
5871 po
= gfc_get_expr ();
5872 po
->expr_type
= EXPR_VARIABLE
;
5873 po
->symtree
= e
->symtree
;
5874 po
->ref
= gfc_copy_ref (e
->ref
);
5875 po
->where
= e
->where
;
5877 /* Remove PPC reference. */
5879 while ((*ref
)->next
)
5880 ref
= &(*ref
)->next
;
5881 gfc_free_ref_list (*ref
);
5884 if (!gfc_resolve_expr (po
))
5891 /* Update the actual arglist of a procedure pointer component to include the
5895 update_ppc_arglist (gfc_expr
* e
)
5899 gfc_typebound_proc
* tb
;
5901 ppc
= gfc_get_proc_ptr_comp (e
);
5909 else if (tb
->nopass
)
5912 po
= extract_ppc_passed_object (e
);
5919 gfc_error ("Passed-object at %L must be scalar", &e
->where
);
5924 if (po
->ts
.type
== BT_DERIVED
&& po
->ts
.u
.derived
->attr
.abstract
)
5926 gfc_error ("Base object for procedure-pointer component call at %L is of"
5927 " ABSTRACT type %qs", &e
->where
, po
->ts
.u
.derived
->name
);
5931 gcc_assert (tb
->pass_arg_num
> 0);
5932 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
5940 /* Check that the object a TBP is called on is valid, i.e. it must not be
5941 of ABSTRACT type (as in subobject%abstract_parent%tbp()). */
5944 check_typebound_baseobject (gfc_expr
* e
)
5947 bool return_value
= false;
5949 base
= extract_compcall_passed_object (e
);
5953 gcc_assert (base
->ts
.type
== BT_DERIVED
|| base
->ts
.type
== BT_CLASS
);
5955 if (base
->ts
.type
== BT_CLASS
&& !gfc_expr_attr (base
).class_ok
)
5959 if (base
->ts
.type
== BT_DERIVED
&& base
->ts
.u
.derived
->attr
.abstract
)
5961 gfc_error ("Base object for type-bound procedure call at %L is of"
5962 " ABSTRACT type %qs", &e
->where
, base
->ts
.u
.derived
->name
);
5966 /* F08:C1230. If the procedure called is NOPASS,
5967 the base object must be scalar. */
5968 if (e
->value
.compcall
.tbp
->nopass
&& base
->rank
!= 0)
5970 gfc_error ("Base object for NOPASS type-bound procedure call at %L must"
5971 " be scalar", &e
->where
);
5975 return_value
= true;
5978 gfc_free_expr (base
);
5979 return return_value
;
5983 /* Resolve a call to a type-bound procedure, either function or subroutine,
5984 statically from the data in an EXPR_COMPCALL expression. The adapted
5985 arglist and the target-procedure symtree are returned. */
5988 resolve_typebound_static (gfc_expr
* e
, gfc_symtree
** target
,
5989 gfc_actual_arglist
** actual
)
5991 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
5992 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
5994 /* Update the actual arglist for PASS. */
5995 if (!update_compcall_arglist (e
))
5998 *actual
= e
->value
.compcall
.actual
;
5999 *target
= e
->value
.compcall
.tbp
->u
.specific
;
6001 gfc_free_ref_list (e
->ref
);
6003 e
->value
.compcall
.actual
= NULL
;
6005 /* If we find a deferred typebound procedure, check for derived types
6006 that an overriding typebound procedure has not been missed. */
6007 if (e
->value
.compcall
.name
6008 && !e
->value
.compcall
.tbp
->non_overridable
6009 && e
->value
.compcall
.base_object
6010 && e
->value
.compcall
.base_object
->ts
.type
== BT_DERIVED
)
6013 gfc_symbol
*derived
;
6015 /* Use the derived type of the base_object. */
6016 derived
= e
->value
.compcall
.base_object
->ts
.u
.derived
;
6019 /* If necessary, go through the inheritance chain. */
6020 while (!st
&& derived
)
6022 /* Look for the typebound procedure 'name'. */
6023 if (derived
->f2k_derived
&& derived
->f2k_derived
->tb_sym_root
)
6024 st
= gfc_find_symtree (derived
->f2k_derived
->tb_sym_root
,
6025 e
->value
.compcall
.name
);
6027 derived
= gfc_get_derived_super_type (derived
);
6030 /* Now find the specific name in the derived type namespace. */
6031 if (st
&& st
->n
.tb
&& st
->n
.tb
->u
.specific
)
6032 gfc_find_sym_tree (st
->n
.tb
->u
.specific
->name
,
6033 derived
->ns
, 1, &st
);
6041 /* Get the ultimate declared type from an expression. In addition,
6042 return the last class/derived type reference and the copy of the
6043 reference list. If check_types is set true, derived types are
6044 identified as well as class references. */
6046 get_declared_from_expr (gfc_ref
**class_ref
, gfc_ref
**new_ref
,
6047 gfc_expr
*e
, bool check_types
)
6049 gfc_symbol
*declared
;
6056 *new_ref
= gfc_copy_ref (e
->ref
);
6058 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
6060 if (ref
->type
!= REF_COMPONENT
)
6063 if ((ref
->u
.c
.component
->ts
.type
== BT_CLASS
6064 || (check_types
&& gfc_bt_struct (ref
->u
.c
.component
->ts
.type
)))
6065 && ref
->u
.c
.component
->attr
.flavor
!= FL_PROCEDURE
)
6067 declared
= ref
->u
.c
.component
->ts
.u
.derived
;
6073 if (declared
== NULL
)
6074 declared
= e
->symtree
->n
.sym
->ts
.u
.derived
;
6080 /* Given an EXPR_COMPCALL calling a GENERIC typebound procedure, figure out
6081 which of the specific bindings (if any) matches the arglist and transform
6082 the expression into a call of that binding. */
6085 resolve_typebound_generic_call (gfc_expr
* e
, const char **name
)
6087 gfc_typebound_proc
* genproc
;
6088 const char* genname
;
6090 gfc_symbol
*derived
;
6092 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6093 genname
= e
->value
.compcall
.name
;
6094 genproc
= e
->value
.compcall
.tbp
;
6096 if (!genproc
->is_generic
)
6099 /* Try the bindings on this type and in the inheritance hierarchy. */
6100 for (; genproc
; genproc
= genproc
->overridden
)
6104 gcc_assert (genproc
->is_generic
);
6105 for (g
= genproc
->u
.generic
; g
; g
= g
->next
)
6108 gfc_actual_arglist
* args
;
6111 gcc_assert (g
->specific
);
6113 if (g
->specific
->error
)
6116 target
= g
->specific
->u
.specific
->n
.sym
;
6118 /* Get the right arglist by handling PASS/NOPASS. */
6119 args
= gfc_copy_actual_arglist (e
->value
.compcall
.actual
);
6120 if (!g
->specific
->nopass
)
6123 po
= extract_compcall_passed_object (e
);
6126 gfc_free_actual_arglist (args
);
6130 gcc_assert (g
->specific
->pass_arg_num
> 0);
6131 gcc_assert (!g
->specific
->error
);
6132 args
= update_arglist_pass (args
, po
, g
->specific
->pass_arg_num
,
6133 g
->specific
->pass_arg
);
6135 resolve_actual_arglist (args
, target
->attr
.proc
,
6136 is_external_proc (target
)
6137 && gfc_sym_get_dummy_args (target
) == NULL
);
6139 /* Check if this arglist matches the formal. */
6140 matches
= gfc_arglist_matches_symbol (&args
, target
);
6142 /* Clean up and break out of the loop if we've found it. */
6143 gfc_free_actual_arglist (args
);
6146 e
->value
.compcall
.tbp
= g
->specific
;
6147 genname
= g
->specific_st
->name
;
6148 /* Pass along the name for CLASS methods, where the vtab
6149 procedure pointer component has to be referenced. */
6157 /* Nothing matching found! */
6158 gfc_error ("Found no matching specific binding for the call to the GENERIC"
6159 " %qs at %L", genname
, &e
->where
);
6163 /* Make sure that we have the right specific instance for the name. */
6164 derived
= get_declared_from_expr (NULL
, NULL
, e
, true);
6166 st
= gfc_find_typebound_proc (derived
, NULL
, genname
, true, &e
->where
);
6168 e
->value
.compcall
.tbp
= st
->n
.tb
;
6174 /* Resolve a call to a type-bound subroutine. */
6177 resolve_typebound_call (gfc_code
* c
, const char **name
, bool *overridable
)
6179 gfc_actual_arglist
* newactual
;
6180 gfc_symtree
* target
;
6182 /* Check that's really a SUBROUTINE. */
6183 if (!c
->expr1
->value
.compcall
.tbp
->subroutine
)
6185 gfc_error ("%qs at %L should be a SUBROUTINE",
6186 c
->expr1
->value
.compcall
.name
, &c
->loc
);
6190 if (!check_typebound_baseobject (c
->expr1
))
6193 /* Pass along the name for CLASS methods, where the vtab
6194 procedure pointer component has to be referenced. */
6196 *name
= c
->expr1
->value
.compcall
.name
;
6198 if (!resolve_typebound_generic_call (c
->expr1
, name
))
6201 /* Pass along the NON_OVERRIDABLE attribute of the specific TBP. */
6203 *overridable
= !c
->expr1
->value
.compcall
.tbp
->non_overridable
;
6205 /* Transform into an ordinary EXEC_CALL for now. */
6207 if (!resolve_typebound_static (c
->expr1
, &target
, &newactual
))
6210 c
->ext
.actual
= newactual
;
6211 c
->symtree
= target
;
6212 c
->op
= (c
->expr1
->value
.compcall
.assign
? EXEC_ASSIGN_CALL
: EXEC_CALL
);
6214 gcc_assert (!c
->expr1
->ref
&& !c
->expr1
->value
.compcall
.actual
);
6216 gfc_free_expr (c
->expr1
);
6217 c
->expr1
= gfc_get_expr ();
6218 c
->expr1
->expr_type
= EXPR_FUNCTION
;
6219 c
->expr1
->symtree
= target
;
6220 c
->expr1
->where
= c
->loc
;
6222 return resolve_call (c
);
6226 /* Resolve a component-call expression. */
6228 resolve_compcall (gfc_expr
* e
, const char **name
)
6230 gfc_actual_arglist
* newactual
;
6231 gfc_symtree
* target
;
6233 /* Check that's really a FUNCTION. */
6234 if (!e
->value
.compcall
.tbp
->function
)
6236 gfc_error ("%qs at %L should be a FUNCTION",
6237 e
->value
.compcall
.name
, &e
->where
);
6241 /* These must not be assign-calls! */
6242 gcc_assert (!e
->value
.compcall
.assign
);
6244 if (!check_typebound_baseobject (e
))
6247 /* Pass along the name for CLASS methods, where the vtab
6248 procedure pointer component has to be referenced. */
6250 *name
= e
->value
.compcall
.name
;
6252 if (!resolve_typebound_generic_call (e
, name
))
6254 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6256 /* Take the rank from the function's symbol. */
6257 if (e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
)
6258 e
->rank
= e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
->rank
;
6260 /* For now, we simply transform it into an EXPR_FUNCTION call with the same
6261 arglist to the TBP's binding target. */
6263 if (!resolve_typebound_static (e
, &target
, &newactual
))
6266 e
->value
.function
.actual
= newactual
;
6267 e
->value
.function
.name
= NULL
;
6268 e
->value
.function
.esym
= target
->n
.sym
;
6269 e
->value
.function
.isym
= NULL
;
6270 e
->symtree
= target
;
6271 e
->ts
= target
->n
.sym
->ts
;
6272 e
->expr_type
= EXPR_FUNCTION
;
6274 /* Resolution is not necessary if this is a class subroutine; this
6275 function only has to identify the specific proc. Resolution of
6276 the call will be done next in resolve_typebound_call. */
6277 return gfc_resolve_expr (e
);
6281 static bool resolve_fl_derived (gfc_symbol
*sym
);
6284 /* Resolve a typebound function, or 'method'. First separate all
6285 the non-CLASS references by calling resolve_compcall directly. */
6288 resolve_typebound_function (gfc_expr
* e
)
6290 gfc_symbol
*declared
;
6302 /* Deal with typebound operators for CLASS objects. */
6303 expr
= e
->value
.compcall
.base_object
;
6304 overridable
= !e
->value
.compcall
.tbp
->non_overridable
;
6305 if (expr
&& expr
->ts
.type
== BT_CLASS
&& e
->value
.compcall
.name
)
6307 /* If the base_object is not a variable, the corresponding actual
6308 argument expression must be stored in e->base_expression so
6309 that the corresponding tree temporary can be used as the base
6310 object in gfc_conv_procedure_call. */
6311 if (expr
->expr_type
!= EXPR_VARIABLE
)
6313 gfc_actual_arglist
*args
;
6315 for (args
= e
->value
.function
.actual
; args
; args
= args
->next
)
6317 if (expr
== args
->expr
)
6322 /* Since the typebound operators are generic, we have to ensure
6323 that any delays in resolution are corrected and that the vtab
6326 declared
= ts
.u
.derived
;
6327 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6328 if (c
->ts
.u
.derived
== NULL
)
6329 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6331 if (!resolve_compcall (e
, &name
))
6334 /* Use the generic name if it is there. */
6335 name
= name
? name
: e
->value
.function
.esym
->name
;
6336 e
->symtree
= expr
->symtree
;
6337 e
->ref
= gfc_copy_ref (expr
->ref
);
6338 get_declared_from_expr (&class_ref
, NULL
, e
, false);
6340 /* Trim away the extraneous references that emerge from nested
6341 use of interface.c (extend_expr). */
6342 if (class_ref
&& class_ref
->next
)
6344 gfc_free_ref_list (class_ref
->next
);
6345 class_ref
->next
= NULL
;
6347 else if (e
->ref
&& !class_ref
&& expr
->ts
.type
!= BT_CLASS
)
6349 gfc_free_ref_list (e
->ref
);
6353 gfc_add_vptr_component (e
);
6354 gfc_add_component_ref (e
, name
);
6355 e
->value
.function
.esym
= NULL
;
6356 if (expr
->expr_type
!= EXPR_VARIABLE
)
6357 e
->base_expr
= expr
;
6362 return resolve_compcall (e
, NULL
);
6364 if (!resolve_ref (e
))
6367 /* Get the CLASS declared type. */
6368 declared
= get_declared_from_expr (&class_ref
, &new_ref
, e
, true);
6370 if (!resolve_fl_derived (declared
))
6373 /* Weed out cases of the ultimate component being a derived type. */
6374 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6375 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6377 gfc_free_ref_list (new_ref
);
6378 return resolve_compcall (e
, NULL
);
6381 c
= gfc_find_component (declared
, "_data", true, true, NULL
);
6382 declared
= c
->ts
.u
.derived
;
6384 /* Treat the call as if it is a typebound procedure, in order to roll
6385 out the correct name for the specific function. */
6386 if (!resolve_compcall (e
, &name
))
6388 gfc_free_ref_list (new_ref
);
6395 /* Convert the expression to a procedure pointer component call. */
6396 e
->value
.function
.esym
= NULL
;
6402 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6403 gfc_add_vptr_component (e
);
6404 gfc_add_component_ref (e
, name
);
6406 /* Recover the typespec for the expression. This is really only
6407 necessary for generic procedures, where the additional call
6408 to gfc_add_component_ref seems to throw the collection of the
6409 correct typespec. */
6413 gfc_free_ref_list (new_ref
);
6418 /* Resolve a typebound subroutine, or 'method'. First separate all
6419 the non-CLASS references by calling resolve_typebound_call
6423 resolve_typebound_subroutine (gfc_code
*code
)
6425 gfc_symbol
*declared
;
6435 st
= code
->expr1
->symtree
;
6437 /* Deal with typebound operators for CLASS objects. */
6438 expr
= code
->expr1
->value
.compcall
.base_object
;
6439 overridable
= !code
->expr1
->value
.compcall
.tbp
->non_overridable
;
6440 if (expr
&& expr
->ts
.type
== BT_CLASS
&& code
->expr1
->value
.compcall
.name
)
6442 /* If the base_object is not a variable, the corresponding actual
6443 argument expression must be stored in e->base_expression so
6444 that the corresponding tree temporary can be used as the base
6445 object in gfc_conv_procedure_call. */
6446 if (expr
->expr_type
!= EXPR_VARIABLE
)
6448 gfc_actual_arglist
*args
;
6450 args
= code
->expr1
->value
.function
.actual
;
6451 for (; args
; args
= args
->next
)
6452 if (expr
== args
->expr
)
6456 /* Since the typebound operators are generic, we have to ensure
6457 that any delays in resolution are corrected and that the vtab
6459 declared
= expr
->ts
.u
.derived
;
6460 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6461 if (c
->ts
.u
.derived
== NULL
)
6462 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6464 if (!resolve_typebound_call (code
, &name
, NULL
))
6467 /* Use the generic name if it is there. */
6468 name
= name
? name
: code
->expr1
->value
.function
.esym
->name
;
6469 code
->expr1
->symtree
= expr
->symtree
;
6470 code
->expr1
->ref
= gfc_copy_ref (expr
->ref
);
6472 /* Trim away the extraneous references that emerge from nested
6473 use of interface.c (extend_expr). */
6474 get_declared_from_expr (&class_ref
, NULL
, code
->expr1
, false);
6475 if (class_ref
&& class_ref
->next
)
6477 gfc_free_ref_list (class_ref
->next
);
6478 class_ref
->next
= NULL
;
6480 else if (code
->expr1
->ref
&& !class_ref
)
6482 gfc_free_ref_list (code
->expr1
->ref
);
6483 code
->expr1
->ref
= NULL
;
6486 /* Now use the procedure in the vtable. */
6487 gfc_add_vptr_component (code
->expr1
);
6488 gfc_add_component_ref (code
->expr1
, name
);
6489 code
->expr1
->value
.function
.esym
= NULL
;
6490 if (expr
->expr_type
!= EXPR_VARIABLE
)
6491 code
->expr1
->base_expr
= expr
;
6496 return resolve_typebound_call (code
, NULL
, NULL
);
6498 if (!resolve_ref (code
->expr1
))
6501 /* Get the CLASS declared type. */
6502 get_declared_from_expr (&class_ref
, &new_ref
, code
->expr1
, true);
6504 /* Weed out cases of the ultimate component being a derived type. */
6505 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6506 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6508 gfc_free_ref_list (new_ref
);
6509 return resolve_typebound_call (code
, NULL
, NULL
);
6512 if (!resolve_typebound_call (code
, &name
, &overridable
))
6514 gfc_free_ref_list (new_ref
);
6517 ts
= code
->expr1
->ts
;
6521 /* Convert the expression to a procedure pointer component call. */
6522 code
->expr1
->value
.function
.esym
= NULL
;
6523 code
->expr1
->symtree
= st
;
6526 code
->expr1
->ref
= new_ref
;
6528 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6529 gfc_add_vptr_component (code
->expr1
);
6530 gfc_add_component_ref (code
->expr1
, name
);
6532 /* Recover the typespec for the expression. This is really only
6533 necessary for generic procedures, where the additional call
6534 to gfc_add_component_ref seems to throw the collection of the
6535 correct typespec. */
6536 code
->expr1
->ts
= ts
;
6539 gfc_free_ref_list (new_ref
);
6545 /* Resolve a CALL to a Procedure Pointer Component (Subroutine). */
6548 resolve_ppc_call (gfc_code
* c
)
6550 gfc_component
*comp
;
6552 comp
= gfc_get_proc_ptr_comp (c
->expr1
);
6553 gcc_assert (comp
!= NULL
);
6555 c
->resolved_sym
= c
->expr1
->symtree
->n
.sym
;
6556 c
->expr1
->expr_type
= EXPR_VARIABLE
;
6558 if (!comp
->attr
.subroutine
)
6559 gfc_add_subroutine (&comp
->attr
, comp
->name
, &c
->expr1
->where
);
6561 if (!resolve_ref (c
->expr1
))
6564 if (!update_ppc_arglist (c
->expr1
))
6567 c
->ext
.actual
= c
->expr1
->value
.compcall
.actual
;
6569 if (!resolve_actual_arglist (c
->ext
.actual
, comp
->attr
.proc
,
6570 !(comp
->ts
.interface
6571 && comp
->ts
.interface
->formal
)))
6574 if (!pure_subroutine (comp
->ts
.interface
, comp
->name
, &c
->expr1
->where
))
6577 gfc_ppc_use (comp
, &c
->expr1
->value
.compcall
.actual
, &c
->expr1
->where
);
6583 /* Resolve a Function Call to a Procedure Pointer Component (Function). */
6586 resolve_expr_ppc (gfc_expr
* e
)
6588 gfc_component
*comp
;
6590 comp
= gfc_get_proc_ptr_comp (e
);
6591 gcc_assert (comp
!= NULL
);
6593 /* Convert to EXPR_FUNCTION. */
6594 e
->expr_type
= EXPR_FUNCTION
;
6595 e
->value
.function
.isym
= NULL
;
6596 e
->value
.function
.actual
= e
->value
.compcall
.actual
;
6598 if (comp
->as
!= NULL
)
6599 e
->rank
= comp
->as
->rank
;
6601 if (!comp
->attr
.function
)
6602 gfc_add_function (&comp
->attr
, comp
->name
, &e
->where
);
6604 if (!resolve_ref (e
))
6607 if (!resolve_actual_arglist (e
->value
.function
.actual
, comp
->attr
.proc
,
6608 !(comp
->ts
.interface
6609 && comp
->ts
.interface
->formal
)))
6612 if (!update_ppc_arglist (e
))
6615 if (!check_pure_function(e
))
6618 gfc_ppc_use (comp
, &e
->value
.compcall
.actual
, &e
->where
);
6625 gfc_is_expandable_expr (gfc_expr
*e
)
6627 gfc_constructor
*con
;
6629 if (e
->expr_type
== EXPR_ARRAY
)
6631 /* Traverse the constructor looking for variables that are flavor
6632 parameter. Parameters must be expanded since they are fully used at
6634 con
= gfc_constructor_first (e
->value
.constructor
);
6635 for (; con
; con
= gfc_constructor_next (con
))
6637 if (con
->expr
->expr_type
== EXPR_VARIABLE
6638 && con
->expr
->symtree
6639 && (con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
6640 || con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_VARIABLE
))
6642 if (con
->expr
->expr_type
== EXPR_ARRAY
6643 && gfc_is_expandable_expr (con
->expr
))
6652 /* Sometimes variables in specification expressions of the result
6653 of module procedures in submodules wind up not being the 'real'
6654 dummy. Find this, if possible, in the namespace of the first
6658 fixup_unique_dummy (gfc_expr
*e
)
6660 gfc_symtree
*st
= NULL
;
6661 gfc_symbol
*s
= NULL
;
6663 if (e
->symtree
->n
.sym
->ns
->proc_name
6664 && e
->symtree
->n
.sym
->ns
->proc_name
->formal
)
6665 s
= e
->symtree
->n
.sym
->ns
->proc_name
->formal
->sym
;
6668 st
= gfc_find_symtree (s
->ns
->sym_root
, e
->symtree
->n
.sym
->name
);
6671 && st
->n
.sym
!= NULL
6672 && st
->n
.sym
->attr
.dummy
)
6676 /* Resolve an expression. That is, make sure that types of operands agree
6677 with their operators, intrinsic operators are converted to function calls
6678 for overloaded types and unresolved function references are resolved. */
6681 gfc_resolve_expr (gfc_expr
*e
)
6684 bool inquiry_save
, actual_arg_save
, first_actual_arg_save
;
6689 /* inquiry_argument only applies to variables. */
6690 inquiry_save
= inquiry_argument
;
6691 actual_arg_save
= actual_arg
;
6692 first_actual_arg_save
= first_actual_arg
;
6694 if (e
->expr_type
!= EXPR_VARIABLE
)
6696 inquiry_argument
= false;
6698 first_actual_arg
= false;
6700 else if (e
->symtree
!= NULL
6701 && *e
->symtree
->name
== '@'
6702 && e
->symtree
->n
.sym
->attr
.dummy
)
6704 /* Deal with submodule specification expressions that are not
6705 found to be referenced in module.c(read_cleanup). */
6706 fixup_unique_dummy (e
);
6709 switch (e
->expr_type
)
6712 t
= resolve_operator (e
);
6718 if (check_host_association (e
))
6719 t
= resolve_function (e
);
6721 t
= resolve_variable (e
);
6723 if (e
->ts
.type
== BT_CHARACTER
&& e
->ts
.u
.cl
== NULL
&& e
->ref
6724 && e
->ref
->type
!= REF_SUBSTRING
)
6725 gfc_resolve_substring_charlen (e
);
6730 t
= resolve_typebound_function (e
);
6733 case EXPR_SUBSTRING
:
6734 t
= resolve_ref (e
);
6743 t
= resolve_expr_ppc (e
);
6748 if (!resolve_ref (e
))
6751 t
= gfc_resolve_array_constructor (e
);
6752 /* Also try to expand a constructor. */
6755 expression_rank (e
);
6756 if (gfc_is_constant_expr (e
) || gfc_is_expandable_expr (e
))
6757 gfc_expand_constructor (e
, false);
6760 /* This provides the opportunity for the length of constructors with
6761 character valued function elements to propagate the string length
6762 to the expression. */
6763 if (t
&& e
->ts
.type
== BT_CHARACTER
)
6765 /* For efficiency, we call gfc_expand_constructor for BT_CHARACTER
6766 here rather then add a duplicate test for it above. */
6767 gfc_expand_constructor (e
, false);
6768 t
= gfc_resolve_character_array_constructor (e
);
6773 case EXPR_STRUCTURE
:
6774 t
= resolve_ref (e
);
6778 t
= resolve_structure_cons (e
, 0);
6782 t
= gfc_simplify_expr (e
, 0);
6786 gfc_internal_error ("gfc_resolve_expr(): Bad expression type");
6789 if (e
->ts
.type
== BT_CHARACTER
&& t
&& !e
->ts
.u
.cl
)
6792 inquiry_argument
= inquiry_save
;
6793 actual_arg
= actual_arg_save
;
6794 first_actual_arg
= first_actual_arg_save
;
6800 /* Resolve an expression from an iterator. They must be scalar and have
6801 INTEGER or (optionally) REAL type. */
6804 gfc_resolve_iterator_expr (gfc_expr
*expr
, bool real_ok
,
6805 const char *name_msgid
)
6807 if (!gfc_resolve_expr (expr
))
6810 if (expr
->rank
!= 0)
6812 gfc_error ("%s at %L must be a scalar", _(name_msgid
), &expr
->where
);
6816 if (expr
->ts
.type
!= BT_INTEGER
)
6818 if (expr
->ts
.type
== BT_REAL
)
6821 return gfc_notify_std (GFC_STD_F95_DEL
,
6822 "%s at %L must be integer",
6823 _(name_msgid
), &expr
->where
);
6826 gfc_error ("%s at %L must be INTEGER", _(name_msgid
),
6833 gfc_error ("%s at %L must be INTEGER", _(name_msgid
), &expr
->where
);
6841 /* Resolve the expressions in an iterator structure. If REAL_OK is
6842 false allow only INTEGER type iterators, otherwise allow REAL types.
6843 Set own_scope to true for ac-implied-do and data-implied-do as those
6844 have a separate scope such that, e.g., a INTENT(IN) doesn't apply. */
6847 gfc_resolve_iterator (gfc_iterator
*iter
, bool real_ok
, bool own_scope
)
6849 if (!gfc_resolve_iterator_expr (iter
->var
, real_ok
, "Loop variable"))
6852 if (!gfc_check_vardef_context (iter
->var
, false, false, own_scope
,
6853 _("iterator variable")))
6856 if (!gfc_resolve_iterator_expr (iter
->start
, real_ok
,
6857 "Start expression in DO loop"))
6860 if (!gfc_resolve_iterator_expr (iter
->end
, real_ok
,
6861 "End expression in DO loop"))
6864 if (!gfc_resolve_iterator_expr (iter
->step
, real_ok
,
6865 "Step expression in DO loop"))
6868 if (iter
->step
->expr_type
== EXPR_CONSTANT
)
6870 if ((iter
->step
->ts
.type
== BT_INTEGER
6871 && mpz_cmp_ui (iter
->step
->value
.integer
, 0) == 0)
6872 || (iter
->step
->ts
.type
== BT_REAL
6873 && mpfr_sgn (iter
->step
->value
.real
) == 0))
6875 gfc_error ("Step expression in DO loop at %L cannot be zero",
6876 &iter
->step
->where
);
6881 /* Convert start, end, and step to the same type as var. */
6882 if (iter
->start
->ts
.kind
!= iter
->var
->ts
.kind
6883 || iter
->start
->ts
.type
!= iter
->var
->ts
.type
)
6884 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
6886 if (iter
->end
->ts
.kind
!= iter
->var
->ts
.kind
6887 || iter
->end
->ts
.type
!= iter
->var
->ts
.type
)
6888 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
6890 if (iter
->step
->ts
.kind
!= iter
->var
->ts
.kind
6891 || iter
->step
->ts
.type
!= iter
->var
->ts
.type
)
6892 gfc_convert_type (iter
->step
, &iter
->var
->ts
, 1);
6894 if (iter
->start
->expr_type
== EXPR_CONSTANT
6895 && iter
->end
->expr_type
== EXPR_CONSTANT
6896 && iter
->step
->expr_type
== EXPR_CONSTANT
)
6899 if (iter
->start
->ts
.type
== BT_INTEGER
)
6901 sgn
= mpz_cmp_ui (iter
->step
->value
.integer
, 0);
6902 cmp
= mpz_cmp (iter
->end
->value
.integer
, iter
->start
->value
.integer
);
6906 sgn
= mpfr_sgn (iter
->step
->value
.real
);
6907 cmp
= mpfr_cmp (iter
->end
->value
.real
, iter
->start
->value
.real
);
6909 if (warn_zerotrip
&& ((sgn
> 0 && cmp
< 0) || (sgn
< 0 && cmp
> 0)))
6910 gfc_warning (OPT_Wzerotrip
,
6911 "DO loop at %L will be executed zero times",
6912 &iter
->step
->where
);
6915 if (iter
->end
->expr_type
== EXPR_CONSTANT
6916 && iter
->end
->ts
.type
== BT_INTEGER
6917 && iter
->step
->expr_type
== EXPR_CONSTANT
6918 && iter
->step
->ts
.type
== BT_INTEGER
6919 && (mpz_cmp_si (iter
->step
->value
.integer
, -1L) == 0
6920 || mpz_cmp_si (iter
->step
->value
.integer
, 1L) == 0))
6922 bool is_step_positive
= mpz_cmp_ui (iter
->step
->value
.integer
, 1) == 0;
6923 int k
= gfc_validate_kind (BT_INTEGER
, iter
->end
->ts
.kind
, false);
6925 if (is_step_positive
6926 && mpz_cmp (iter
->end
->value
.integer
, gfc_integer_kinds
[k
].huge
) == 0)
6927 gfc_warning (OPT_Wundefined_do_loop
,
6928 "DO loop at %L is undefined as it overflows",
6929 &iter
->step
->where
);
6930 else if (!is_step_positive
6931 && mpz_cmp (iter
->end
->value
.integer
,
6932 gfc_integer_kinds
[k
].min_int
) == 0)
6933 gfc_warning (OPT_Wundefined_do_loop
,
6934 "DO loop at %L is undefined as it underflows",
6935 &iter
->step
->where
);
6942 /* Traversal function for find_forall_index. f == 2 signals that
6943 that variable itself is not to be checked - only the references. */
6946 forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int *f
)
6948 if (expr
->expr_type
!= EXPR_VARIABLE
)
6951 /* A scalar assignment */
6952 if (!expr
->ref
|| *f
== 1)
6954 if (expr
->symtree
->n
.sym
== sym
)
6966 /* Check whether the FORALL index appears in the expression or not.
6967 Returns true if SYM is found in EXPR. */
6970 find_forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int f
)
6972 if (gfc_traverse_expr (expr
, sym
, forall_index
, f
))
6979 /* Resolve a list of FORALL iterators. The FORALL index-name is constrained
6980 to be a scalar INTEGER variable. The subscripts and stride are scalar
6981 INTEGERs, and if stride is a constant it must be nonzero.
6982 Furthermore "A subscript or stride in a forall-triplet-spec shall
6983 not contain a reference to any index-name in the
6984 forall-triplet-spec-list in which it appears." (7.5.4.1) */
6987 resolve_forall_iterators (gfc_forall_iterator
*it
)
6989 gfc_forall_iterator
*iter
, *iter2
;
6991 for (iter
= it
; iter
; iter
= iter
->next
)
6993 if (gfc_resolve_expr (iter
->var
)
6994 && (iter
->var
->ts
.type
!= BT_INTEGER
|| iter
->var
->rank
!= 0))
6995 gfc_error ("FORALL index-name at %L must be a scalar INTEGER",
6998 if (gfc_resolve_expr (iter
->start
)
6999 && (iter
->start
->ts
.type
!= BT_INTEGER
|| iter
->start
->rank
!= 0))
7000 gfc_error ("FORALL start expression at %L must be a scalar INTEGER",
7001 &iter
->start
->where
);
7002 if (iter
->var
->ts
.kind
!= iter
->start
->ts
.kind
)
7003 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7005 if (gfc_resolve_expr (iter
->end
)
7006 && (iter
->end
->ts
.type
!= BT_INTEGER
|| iter
->end
->rank
!= 0))
7007 gfc_error ("FORALL end expression at %L must be a scalar INTEGER",
7009 if (iter
->var
->ts
.kind
!= iter
->end
->ts
.kind
)
7010 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7012 if (gfc_resolve_expr (iter
->stride
))
7014 if (iter
->stride
->ts
.type
!= BT_INTEGER
|| iter
->stride
->rank
!= 0)
7015 gfc_error ("FORALL stride expression at %L must be a scalar %s",
7016 &iter
->stride
->where
, "INTEGER");
7018 if (iter
->stride
->expr_type
== EXPR_CONSTANT
7019 && mpz_cmp_ui (iter
->stride
->value
.integer
, 0) == 0)
7020 gfc_error ("FORALL stride expression at %L cannot be zero",
7021 &iter
->stride
->where
);
7023 if (iter
->var
->ts
.kind
!= iter
->stride
->ts
.kind
)
7024 gfc_convert_type (iter
->stride
, &iter
->var
->ts
, 1);
7027 for (iter
= it
; iter
; iter
= iter
->next
)
7028 for (iter2
= iter
; iter2
; iter2
= iter2
->next
)
7030 if (find_forall_index (iter2
->start
, iter
->var
->symtree
->n
.sym
, 0)
7031 || find_forall_index (iter2
->end
, iter
->var
->symtree
->n
.sym
, 0)
7032 || find_forall_index (iter2
->stride
, iter
->var
->symtree
->n
.sym
, 0))
7033 gfc_error ("FORALL index %qs may not appear in triplet "
7034 "specification at %L", iter
->var
->symtree
->name
,
7035 &iter2
->start
->where
);
7040 /* Given a pointer to a symbol that is a derived type, see if it's
7041 inaccessible, i.e. if it's defined in another module and the components are
7042 PRIVATE. The search is recursive if necessary. Returns zero if no
7043 inaccessible components are found, nonzero otherwise. */
7046 derived_inaccessible (gfc_symbol
*sym
)
7050 if (sym
->attr
.use_assoc
&& sym
->attr
.private_comp
)
7053 for (c
= sym
->components
; c
; c
= c
->next
)
7055 /* Prevent an infinite loop through this function. */
7056 if (c
->ts
.type
== BT_DERIVED
&& c
->attr
.pointer
7057 && sym
== c
->ts
.u
.derived
)
7060 if (c
->ts
.type
== BT_DERIVED
&& derived_inaccessible (c
->ts
.u
.derived
))
7068 /* Resolve the argument of a deallocate expression. The expression must be
7069 a pointer or a full array. */
7072 resolve_deallocate_expr (gfc_expr
*e
)
7074 symbol_attribute attr
;
7075 int allocatable
, pointer
;
7081 if (!gfc_resolve_expr (e
))
7084 if (e
->expr_type
!= EXPR_VARIABLE
)
7087 sym
= e
->symtree
->n
.sym
;
7088 unlimited
= UNLIMITED_POLY(sym
);
7090 if (sym
->ts
.type
== BT_CLASS
)
7092 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7093 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7097 allocatable
= sym
->attr
.allocatable
;
7098 pointer
= sym
->attr
.pointer
;
7100 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7105 if (ref
->u
.ar
.type
!= AR_FULL
7106 && !(ref
->u
.ar
.type
== AR_ELEMENT
&& ref
->u
.ar
.as
->rank
== 0
7107 && ref
->u
.ar
.codimen
&& gfc_ref_this_image (ref
)))
7112 c
= ref
->u
.c
.component
;
7113 if (c
->ts
.type
== BT_CLASS
)
7115 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7116 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7120 allocatable
= c
->attr
.allocatable
;
7121 pointer
= c
->attr
.pointer
;
7131 attr
= gfc_expr_attr (e
);
7133 if (allocatable
== 0 && attr
.pointer
== 0 && !unlimited
)
7136 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7142 if (gfc_is_coindexed (e
))
7144 gfc_error ("Coindexed allocatable object at %L", &e
->where
);
7149 && !gfc_check_vardef_context (e
, true, true, false,
7150 _("DEALLOCATE object")))
7152 if (!gfc_check_vardef_context (e
, false, true, false,
7153 _("DEALLOCATE object")))
7160 /* Returns true if the expression e contains a reference to the symbol sym. */
7162 sym_in_expr (gfc_expr
*e
, gfc_symbol
*sym
, int *f ATTRIBUTE_UNUSED
)
7164 if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
== sym
)
7171 gfc_find_sym_in_expr (gfc_symbol
*sym
, gfc_expr
*e
)
7173 return gfc_traverse_expr (e
, sym
, sym_in_expr
, 0);
7177 /* Given the expression node e for an allocatable/pointer of derived type to be
7178 allocated, get the expression node to be initialized afterwards (needed for
7179 derived types with default initializers, and derived types with allocatable
7180 components that need nullification.) */
7183 gfc_expr_to_initialize (gfc_expr
*e
)
7189 result
= gfc_copy_expr (e
);
7191 /* Change the last array reference from AR_ELEMENT to AR_FULL. */
7192 for (ref
= result
->ref
; ref
; ref
= ref
->next
)
7193 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
7195 ref
->u
.ar
.type
= AR_FULL
;
7197 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
7198 ref
->u
.ar
.start
[i
] = ref
->u
.ar
.end
[i
] = ref
->u
.ar
.stride
[i
] = NULL
;
7203 gfc_free_shape (&result
->shape
, result
->rank
);
7205 /* Recalculate rank, shape, etc. */
7206 gfc_resolve_expr (result
);
7211 /* If the last ref of an expression is an array ref, return a copy of the
7212 expression with that one removed. Otherwise, a copy of the original
7213 expression. This is used for allocate-expressions and pointer assignment
7214 LHS, where there may be an array specification that needs to be stripped
7215 off when using gfc_check_vardef_context. */
7218 remove_last_array_ref (gfc_expr
* e
)
7223 e2
= gfc_copy_expr (e
);
7224 for (r
= &e2
->ref
; *r
; r
= &(*r
)->next
)
7225 if ((*r
)->type
== REF_ARRAY
&& !(*r
)->next
)
7227 gfc_free_ref_list (*r
);
7236 /* Used in resolve_allocate_expr to check that a allocation-object and
7237 a source-expr are conformable. This does not catch all possible
7238 cases; in particular a runtime checking is needed. */
7241 conformable_arrays (gfc_expr
*e1
, gfc_expr
*e2
)
7244 for (tail
= e2
->ref
; tail
&& tail
->next
; tail
= tail
->next
);
7246 /* First compare rank. */
7247 if ((tail
&& e1
->rank
!= tail
->u
.ar
.as
->rank
)
7248 || (!tail
&& e1
->rank
!= e2
->rank
))
7250 gfc_error ("Source-expr at %L must be scalar or have the "
7251 "same rank as the allocate-object at %L",
7252 &e1
->where
, &e2
->where
);
7263 for (i
= 0; i
< e1
->rank
; i
++)
7265 if (tail
->u
.ar
.start
[i
] == NULL
)
7268 if (tail
->u
.ar
.end
[i
])
7270 mpz_set (s
, tail
->u
.ar
.end
[i
]->value
.integer
);
7271 mpz_sub (s
, s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7272 mpz_add_ui (s
, s
, 1);
7276 mpz_set (s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7279 if (mpz_cmp (e1
->shape
[i
], s
) != 0)
7281 gfc_error ("Source-expr at %L and allocate-object at %L must "
7282 "have the same shape", &e1
->where
, &e2
->where
);
7295 /* Resolve the expression in an ALLOCATE statement, doing the additional
7296 checks to see whether the expression is OK or not. The expression must
7297 have a trailing array reference that gives the size of the array. */
7300 resolve_allocate_expr (gfc_expr
*e
, gfc_code
*code
, bool *array_alloc_wo_spec
)
7302 int i
, pointer
, allocatable
, dimension
, is_abstract
;
7306 symbol_attribute attr
;
7307 gfc_ref
*ref
, *ref2
;
7310 gfc_symbol
*sym
= NULL
;
7315 /* Mark the utmost array component as being in allocate to allow DIMEN_STAR
7316 checking of coarrays. */
7317 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7318 if (ref
->next
== NULL
)
7321 if (ref
&& ref
->type
== REF_ARRAY
)
7322 ref
->u
.ar
.in_allocate
= true;
7324 if (!gfc_resolve_expr (e
))
7327 /* Make sure the expression is allocatable or a pointer. If it is
7328 pointer, the next-to-last reference must be a pointer. */
7332 sym
= e
->symtree
->n
.sym
;
7334 /* Check whether ultimate component is abstract and CLASS. */
7337 /* Is the allocate-object unlimited polymorphic? */
7338 unlimited
= UNLIMITED_POLY(e
);
7340 if (e
->expr_type
!= EXPR_VARIABLE
)
7343 attr
= gfc_expr_attr (e
);
7344 pointer
= attr
.pointer
;
7345 dimension
= attr
.dimension
;
7346 codimension
= attr
.codimension
;
7350 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
))
7352 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7353 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7354 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
7355 codimension
= CLASS_DATA (sym
)->attr
.codimension
;
7356 is_abstract
= CLASS_DATA (sym
)->attr
.abstract
;
7360 allocatable
= sym
->attr
.allocatable
;
7361 pointer
= sym
->attr
.pointer
;
7362 dimension
= sym
->attr
.dimension
;
7363 codimension
= sym
->attr
.codimension
;
7368 for (ref
= e
->ref
; ref
; ref2
= ref
, ref
= ref
->next
)
7373 if (ref
->u
.ar
.codimen
> 0)
7376 for (n
= ref
->u
.ar
.dimen
;
7377 n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
7378 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_THIS_IMAGE
)
7385 if (ref
->next
!= NULL
)
7393 gfc_error ("Coindexed allocatable object at %L",
7398 c
= ref
->u
.c
.component
;
7399 if (c
->ts
.type
== BT_CLASS
)
7401 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7402 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7403 dimension
= CLASS_DATA (c
)->attr
.dimension
;
7404 codimension
= CLASS_DATA (c
)->attr
.codimension
;
7405 is_abstract
= CLASS_DATA (c
)->attr
.abstract
;
7409 allocatable
= c
->attr
.allocatable
;
7410 pointer
= c
->attr
.pointer
;
7411 dimension
= c
->attr
.dimension
;
7412 codimension
= c
->attr
.codimension
;
7413 is_abstract
= c
->attr
.abstract
;
7425 /* Check for F08:C628. */
7426 if (allocatable
== 0 && pointer
== 0 && !unlimited
)
7428 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7433 /* Some checks for the SOURCE tag. */
7436 /* Check F03:C631. */
7437 if (!gfc_type_compatible (&e
->ts
, &code
->expr3
->ts
))
7439 gfc_error ("Type of entity at %L is type incompatible with "
7440 "source-expr at %L", &e
->where
, &code
->expr3
->where
);
7444 /* Check F03:C632 and restriction following Note 6.18. */
7445 if (code
->expr3
->rank
> 0 && !conformable_arrays (code
->expr3
, e
))
7448 /* Check F03:C633. */
7449 if (code
->expr3
->ts
.kind
!= e
->ts
.kind
&& !unlimited
)
7451 gfc_error ("The allocate-object at %L and the source-expr at %L "
7452 "shall have the same kind type parameter",
7453 &e
->where
, &code
->expr3
->where
);
7457 /* Check F2008, C642. */
7458 if (code
->expr3
->ts
.type
== BT_DERIVED
7459 && ((codimension
&& gfc_expr_attr (code
->expr3
).lock_comp
)
7460 || (code
->expr3
->ts
.u
.derived
->from_intmod
7461 == INTMOD_ISO_FORTRAN_ENV
7462 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7463 == ISOFORTRAN_LOCK_TYPE
)))
7465 gfc_error ("The source-expr at %L shall neither be of type "
7466 "LOCK_TYPE nor have a LOCK_TYPE component if "
7467 "allocate-object at %L is a coarray",
7468 &code
->expr3
->where
, &e
->where
);
7472 /* Check TS18508, C702/C703. */
7473 if (code
->expr3
->ts
.type
== BT_DERIVED
7474 && ((codimension
&& gfc_expr_attr (code
->expr3
).event_comp
)
7475 || (code
->expr3
->ts
.u
.derived
->from_intmod
7476 == INTMOD_ISO_FORTRAN_ENV
7477 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7478 == ISOFORTRAN_EVENT_TYPE
)))
7480 gfc_error ("The source-expr at %L shall neither be of type "
7481 "EVENT_TYPE nor have a EVENT_TYPE component if "
7482 "allocate-object at %L is a coarray",
7483 &code
->expr3
->where
, &e
->where
);
7488 /* Check F08:C629. */
7489 if (is_abstract
&& code
->ext
.alloc
.ts
.type
== BT_UNKNOWN
7492 gcc_assert (e
->ts
.type
== BT_CLASS
);
7493 gfc_error ("Allocating %s of ABSTRACT base type at %L requires a "
7494 "type-spec or source-expr", sym
->name
, &e
->where
);
7498 /* Check F08:C632. */
7499 if (code
->ext
.alloc
.ts
.type
== BT_CHARACTER
&& !e
->ts
.deferred
7500 && !UNLIMITED_POLY (e
))
7504 if (!e
->ts
.u
.cl
->length
)
7507 cmp
= gfc_dep_compare_expr (e
->ts
.u
.cl
->length
,
7508 code
->ext
.alloc
.ts
.u
.cl
->length
);
7509 if (cmp
== 1 || cmp
== -1 || cmp
== -3)
7511 gfc_error ("Allocating %s at %L with type-spec requires the same "
7512 "character-length parameter as in the declaration",
7513 sym
->name
, &e
->where
);
7518 /* In the variable definition context checks, gfc_expr_attr is used
7519 on the expression. This is fooled by the array specification
7520 present in e, thus we have to eliminate that one temporarily. */
7521 e2
= remove_last_array_ref (e
);
7524 t
= gfc_check_vardef_context (e2
, true, true, false,
7525 _("ALLOCATE object"));
7527 t
= gfc_check_vardef_context (e2
, false, true, false,
7528 _("ALLOCATE object"));
7533 if (e
->ts
.type
== BT_CLASS
&& CLASS_DATA (e
)->attr
.dimension
7534 && !code
->expr3
&& code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7536 /* For class arrays, the initialization with SOURCE is done
7537 using _copy and trans_call. It is convenient to exploit that
7538 when the allocated type is different from the declared type but
7539 no SOURCE exists by setting expr3. */
7540 code
->expr3
= gfc_default_initializer (&code
->ext
.alloc
.ts
);
7542 else if (flag_coarray
!= GFC_FCOARRAY_LIB
&& e
->ts
.type
== BT_DERIVED
7543 && e
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
7544 && e
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
7546 /* We have to zero initialize the integer variable. */
7547 code
->expr3
= gfc_get_int_expr (gfc_default_integer_kind
, &e
->where
, 0);
7550 if (e
->ts
.type
== BT_CLASS
&& !unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7552 /* Make sure the vtab symbol is present when
7553 the module variables are generated. */
7554 gfc_typespec ts
= e
->ts
;
7556 ts
= code
->expr3
->ts
;
7557 else if (code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7558 ts
= code
->ext
.alloc
.ts
;
7560 /* Finding the vtab also publishes the type's symbol. Therefore this
7561 statement is necessary. */
7562 gfc_find_derived_vtab (ts
.u
.derived
);
7564 else if (unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7566 /* Again, make sure the vtab symbol is present when
7567 the module variables are generated. */
7568 gfc_typespec
*ts
= NULL
;
7570 ts
= &code
->expr3
->ts
;
7572 ts
= &code
->ext
.alloc
.ts
;
7576 /* Finding the vtab also publishes the type's symbol. Therefore this
7577 statement is necessary. */
7581 if (dimension
== 0 && codimension
== 0)
7584 /* Make sure the last reference node is an array specification. */
7586 if (!ref2
|| ref2
->type
!= REF_ARRAY
|| ref2
->u
.ar
.type
== AR_FULL
7587 || (dimension
&& ref2
->u
.ar
.dimen
== 0))
7592 if (!gfc_notify_std (GFC_STD_F2008
, "Array specification required "
7593 "in ALLOCATE statement at %L", &e
->where
))
7595 if (code
->expr3
->rank
!= 0)
7596 *array_alloc_wo_spec
= true;
7599 gfc_error ("Array specification or array-valued SOURCE= "
7600 "expression required in ALLOCATE statement at %L",
7607 gfc_error ("Array specification required in ALLOCATE statement "
7608 "at %L", &e
->where
);
7613 /* Make sure that the array section reference makes sense in the
7614 context of an ALLOCATE specification. */
7619 for (i
= ar
->dimen
; i
< ar
->dimen
+ ar
->codimen
; i
++)
7620 if (ar
->dimen_type
[i
] == DIMEN_THIS_IMAGE
)
7622 gfc_error ("Coarray specification required in ALLOCATE statement "
7623 "at %L", &e
->where
);
7627 for (i
= 0; i
< ar
->dimen
; i
++)
7629 if (ar
->type
== AR_ELEMENT
|| ar
->type
== AR_FULL
)
7632 switch (ar
->dimen_type
[i
])
7638 if (ar
->start
[i
] != NULL
7639 && ar
->end
[i
] != NULL
7640 && ar
->stride
[i
] == NULL
)
7648 case DIMEN_THIS_IMAGE
:
7649 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7655 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7657 sym
= a
->expr
->symtree
->n
.sym
;
7659 /* TODO - check derived type components. */
7660 if (gfc_bt_struct (sym
->ts
.type
) || sym
->ts
.type
== BT_CLASS
)
7663 if ((ar
->start
[i
] != NULL
7664 && gfc_find_sym_in_expr (sym
, ar
->start
[i
]))
7665 || (ar
->end
[i
] != NULL
7666 && gfc_find_sym_in_expr (sym
, ar
->end
[i
])))
7668 gfc_error ("%qs must not appear in the array specification at "
7669 "%L in the same ALLOCATE statement where it is "
7670 "itself allocated", sym
->name
, &ar
->where
);
7676 for (i
= ar
->dimen
; i
< ar
->codimen
+ ar
->dimen
; i
++)
7678 if (ar
->dimen_type
[i
] == DIMEN_ELEMENT
7679 || ar
->dimen_type
[i
] == DIMEN_RANGE
)
7681 if (i
== (ar
->dimen
+ ar
->codimen
- 1))
7683 gfc_error ("Expected '*' in coindex specification in ALLOCATE "
7684 "statement at %L", &e
->where
);
7690 if (ar
->dimen_type
[i
] == DIMEN_STAR
&& i
== (ar
->dimen
+ ar
->codimen
- 1)
7691 && ar
->stride
[i
] == NULL
)
7694 gfc_error ("Bad coarray specification in ALLOCATE statement at %L",
7708 resolve_allocate_deallocate (gfc_code
*code
, const char *fcn
)
7710 gfc_expr
*stat
, *errmsg
, *pe
, *qe
;
7711 gfc_alloc
*a
, *p
, *q
;
7714 errmsg
= code
->expr2
;
7716 /* Check the stat variable. */
7719 gfc_check_vardef_context (stat
, false, false, false,
7720 _("STAT variable"));
7722 if ((stat
->ts
.type
!= BT_INTEGER
7723 && !(stat
->ref
&& (stat
->ref
->type
== REF_ARRAY
7724 || stat
->ref
->type
== REF_COMPONENT
)))
7726 gfc_error ("Stat-variable at %L must be a scalar INTEGER "
7727 "variable", &stat
->where
);
7729 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7730 if (p
->expr
->symtree
->n
.sym
->name
== stat
->symtree
->n
.sym
->name
)
7732 gfc_ref
*ref1
, *ref2
;
7735 for (ref1
= p
->expr
->ref
, ref2
= stat
->ref
; ref1
&& ref2
;
7736 ref1
= ref1
->next
, ref2
= ref2
->next
)
7738 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7740 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7749 gfc_error ("Stat-variable at %L shall not be %sd within "
7750 "the same %s statement", &stat
->where
, fcn
, fcn
);
7756 /* Check the errmsg variable. */
7760 gfc_warning (0, "ERRMSG at %L is useless without a STAT tag",
7763 gfc_check_vardef_context (errmsg
, false, false, false,
7764 _("ERRMSG variable"));
7766 if ((errmsg
->ts
.type
!= BT_CHARACTER
7768 && (errmsg
->ref
->type
== REF_ARRAY
7769 || errmsg
->ref
->type
== REF_COMPONENT
)))
7770 || errmsg
->rank
> 0 )
7771 gfc_error ("Errmsg-variable at %L must be a scalar CHARACTER "
7772 "variable", &errmsg
->where
);
7774 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7775 if (p
->expr
->symtree
->n
.sym
->name
== errmsg
->symtree
->n
.sym
->name
)
7777 gfc_ref
*ref1
, *ref2
;
7780 for (ref1
= p
->expr
->ref
, ref2
= errmsg
->ref
; ref1
&& ref2
;
7781 ref1
= ref1
->next
, ref2
= ref2
->next
)
7783 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7785 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7794 gfc_error ("Errmsg-variable at %L shall not be %sd within "
7795 "the same %s statement", &errmsg
->where
, fcn
, fcn
);
7801 /* Check that an allocate-object appears only once in the statement. */
7803 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7806 for (q
= p
->next
; q
; q
= q
->next
)
7809 if (pe
->symtree
->n
.sym
->name
== qe
->symtree
->n
.sym
->name
)
7811 /* This is a potential collision. */
7812 gfc_ref
*pr
= pe
->ref
;
7813 gfc_ref
*qr
= qe
->ref
;
7815 /* Follow the references until
7816 a) They start to differ, in which case there is no error;
7817 you can deallocate a%b and a%c in a single statement
7818 b) Both of them stop, which is an error
7819 c) One of them stops, which is also an error. */
7822 if (pr
== NULL
&& qr
== NULL
)
7824 gfc_error ("Allocate-object at %L also appears at %L",
7825 &pe
->where
, &qe
->where
);
7828 else if (pr
!= NULL
&& qr
== NULL
)
7830 gfc_error ("Allocate-object at %L is subobject of"
7831 " object at %L", &pe
->where
, &qe
->where
);
7834 else if (pr
== NULL
&& qr
!= NULL
)
7836 gfc_error ("Allocate-object at %L is subobject of"
7837 " object at %L", &qe
->where
, &pe
->where
);
7840 /* Here, pr != NULL && qr != NULL */
7841 gcc_assert(pr
->type
== qr
->type
);
7842 if (pr
->type
== REF_ARRAY
)
7844 /* Handle cases like allocate(v(3)%x(3), v(2)%x(3)),
7846 gcc_assert (qr
->type
== REF_ARRAY
);
7848 if (pr
->next
&& qr
->next
)
7851 gfc_array_ref
*par
= &(pr
->u
.ar
);
7852 gfc_array_ref
*qar
= &(qr
->u
.ar
);
7854 for (i
=0; i
<par
->dimen
; i
++)
7856 if ((par
->start
[i
] != NULL
7857 || qar
->start
[i
] != NULL
)
7858 && gfc_dep_compare_expr (par
->start
[i
],
7859 qar
->start
[i
]) != 0)
7866 if (pr
->u
.c
.component
->name
!= qr
->u
.c
.component
->name
)
7879 if (strcmp (fcn
, "ALLOCATE") == 0)
7881 bool arr_alloc_wo_spec
= false;
7883 /* Resolving the expr3 in the loop over all objects to allocate would
7884 execute loop invariant code for each loop item. Therefore do it just
7886 if (code
->expr3
&& code
->expr3
->mold
7887 && code
->expr3
->ts
.type
== BT_DERIVED
)
7889 /* Default initialization via MOLD (non-polymorphic). */
7890 gfc_expr
*rhs
= gfc_default_initializer (&code
->expr3
->ts
);
7893 gfc_resolve_expr (rhs
);
7894 gfc_free_expr (code
->expr3
);
7898 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7899 resolve_allocate_expr (a
->expr
, code
, &arr_alloc_wo_spec
);
7901 if (arr_alloc_wo_spec
&& code
->expr3
)
7903 /* Mark the allocate to have to take the array specification
7905 code
->ext
.alloc
.arr_spec_from_expr3
= 1;
7910 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7911 resolve_deallocate_expr (a
->expr
);
7916 /************ SELECT CASE resolution subroutines ************/
7918 /* Callback function for our mergesort variant. Determines interval
7919 overlaps for CASEs. Return <0 if op1 < op2, 0 for overlap, >0 for
7920 op1 > op2. Assumes we're not dealing with the default case.
7921 We have op1 = (:L), (K:L) or (K:) and op2 = (:N), (M:N) or (M:).
7922 There are nine situations to check. */
7925 compare_cases (const gfc_case
*op1
, const gfc_case
*op2
)
7929 if (op1
->low
== NULL
) /* op1 = (:L) */
7931 /* op2 = (:N), so overlap. */
7933 /* op2 = (M:) or (M:N), L < M */
7934 if (op2
->low
!= NULL
7935 && gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
7938 else if (op1
->high
== NULL
) /* op1 = (K:) */
7940 /* op2 = (M:), so overlap. */
7942 /* op2 = (:N) or (M:N), K > N */
7943 if (op2
->high
!= NULL
7944 && gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
7947 else /* op1 = (K:L) */
7949 if (op2
->low
== NULL
) /* op2 = (:N), K > N */
7950 retval
= (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
7952 else if (op2
->high
== NULL
) /* op2 = (M:), L < M */
7953 retval
= (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
7955 else /* op2 = (M:N) */
7959 if (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
7962 else if (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
7971 /* Merge-sort a double linked case list, detecting overlap in the
7972 process. LIST is the head of the double linked case list before it
7973 is sorted. Returns the head of the sorted list if we don't see any
7974 overlap, or NULL otherwise. */
7977 check_case_overlap (gfc_case
*list
)
7979 gfc_case
*p
, *q
, *e
, *tail
;
7980 int insize
, nmerges
, psize
, qsize
, cmp
, overlap_seen
;
7982 /* If the passed list was empty, return immediately. */
7989 /* Loop unconditionally. The only exit from this loop is a return
7990 statement, when we've finished sorting the case list. */
7997 /* Count the number of merges we do in this pass. */
8000 /* Loop while there exists a merge to be done. */
8005 /* Count this merge. */
8008 /* Cut the list in two pieces by stepping INSIZE places
8009 forward in the list, starting from P. */
8012 for (i
= 0; i
< insize
; i
++)
8021 /* Now we have two lists. Merge them! */
8022 while (psize
> 0 || (qsize
> 0 && q
!= NULL
))
8024 /* See from which the next case to merge comes from. */
8027 /* P is empty so the next case must come from Q. */
8032 else if (qsize
== 0 || q
== NULL
)
8041 cmp
= compare_cases (p
, q
);
8044 /* The whole case range for P is less than the
8052 /* The whole case range for Q is greater than
8053 the case range for P. */
8060 /* The cases overlap, or they are the same
8061 element in the list. Either way, we must
8062 issue an error and get the next case from P. */
8063 /* FIXME: Sort P and Q by line number. */
8064 gfc_error ("CASE label at %L overlaps with CASE "
8065 "label at %L", &p
->where
, &q
->where
);
8073 /* Add the next element to the merged list. */
8082 /* P has now stepped INSIZE places along, and so has Q. So
8083 they're the same. */
8088 /* If we have done only one merge or none at all, we've
8089 finished sorting the cases. */
8098 /* Otherwise repeat, merging lists twice the size. */
8104 /* Check to see if an expression is suitable for use in a CASE statement.
8105 Makes sure that all case expressions are scalar constants of the same
8106 type. Return false if anything is wrong. */
8109 validate_case_label_expr (gfc_expr
*e
, gfc_expr
*case_expr
)
8111 if (e
== NULL
) return true;
8113 if (e
->ts
.type
!= case_expr
->ts
.type
)
8115 gfc_error ("Expression in CASE statement at %L must be of type %s",
8116 &e
->where
, gfc_basic_typename (case_expr
->ts
.type
));
8120 /* C805 (R808) For a given case-construct, each case-value shall be of
8121 the same type as case-expr. For character type, length differences
8122 are allowed, but the kind type parameters shall be the same. */
8124 if (case_expr
->ts
.type
== BT_CHARACTER
&& e
->ts
.kind
!= case_expr
->ts
.kind
)
8126 gfc_error ("Expression in CASE statement at %L must be of kind %d",
8127 &e
->where
, case_expr
->ts
.kind
);
8131 /* Convert the case value kind to that of case expression kind,
8134 if (e
->ts
.kind
!= case_expr
->ts
.kind
)
8135 gfc_convert_type_warn (e
, &case_expr
->ts
, 2, 0);
8139 gfc_error ("Expression in CASE statement at %L must be scalar",
8148 /* Given a completely parsed select statement, we:
8150 - Validate all expressions and code within the SELECT.
8151 - Make sure that the selection expression is not of the wrong type.
8152 - Make sure that no case ranges overlap.
8153 - Eliminate unreachable cases and unreachable code resulting from
8154 removing case labels.
8156 The standard does allow unreachable cases, e.g. CASE (5:3). But
8157 they are a hassle for code generation, and to prevent that, we just
8158 cut them out here. This is not necessary for overlapping cases
8159 because they are illegal and we never even try to generate code.
8161 We have the additional caveat that a SELECT construct could have
8162 been a computed GOTO in the source code. Fortunately we can fairly
8163 easily work around that here: The case_expr for a "real" SELECT CASE
8164 is in code->expr1, but for a computed GOTO it is in code->expr2. All
8165 we have to do is make sure that the case_expr is a scalar integer
8169 resolve_select (gfc_code
*code
, bool select_type
)
8172 gfc_expr
*case_expr
;
8173 gfc_case
*cp
, *default_case
, *tail
, *head
;
8174 int seen_unreachable
;
8180 if (code
->expr1
== NULL
)
8182 /* This was actually a computed GOTO statement. */
8183 case_expr
= code
->expr2
;
8184 if (case_expr
->ts
.type
!= BT_INTEGER
|| case_expr
->rank
!= 0)
8185 gfc_error ("Selection expression in computed GOTO statement "
8186 "at %L must be a scalar integer expression",
8189 /* Further checking is not necessary because this SELECT was built
8190 by the compiler, so it should always be OK. Just move the
8191 case_expr from expr2 to expr so that we can handle computed
8192 GOTOs as normal SELECTs from here on. */
8193 code
->expr1
= code
->expr2
;
8198 case_expr
= code
->expr1
;
8199 type
= case_expr
->ts
.type
;
8202 if (type
!= BT_LOGICAL
&& type
!= BT_INTEGER
&& type
!= BT_CHARACTER
)
8204 gfc_error ("Argument of SELECT statement at %L cannot be %s",
8205 &case_expr
->where
, gfc_typename (&case_expr
->ts
));
8207 /* Punt. Going on here just produce more garbage error messages. */
8212 if (!select_type
&& case_expr
->rank
!= 0)
8214 gfc_error ("Argument of SELECT statement at %L must be a scalar "
8215 "expression", &case_expr
->where
);
8221 /* Raise a warning if an INTEGER case value exceeds the range of
8222 the case-expr. Later, all expressions will be promoted to the
8223 largest kind of all case-labels. */
8225 if (type
== BT_INTEGER
)
8226 for (body
= code
->block
; body
; body
= body
->block
)
8227 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8230 && gfc_check_integer_range (cp
->low
->value
.integer
,
8231 case_expr
->ts
.kind
) != ARITH_OK
)
8232 gfc_warning (0, "Expression in CASE statement at %L is "
8233 "not in the range of %s", &cp
->low
->where
,
8234 gfc_typename (&case_expr
->ts
));
8237 && cp
->low
!= cp
->high
8238 && gfc_check_integer_range (cp
->high
->value
.integer
,
8239 case_expr
->ts
.kind
) != ARITH_OK
)
8240 gfc_warning (0, "Expression in CASE statement at %L is "
8241 "not in the range of %s", &cp
->high
->where
,
8242 gfc_typename (&case_expr
->ts
));
8245 /* PR 19168 has a long discussion concerning a mismatch of the kinds
8246 of the SELECT CASE expression and its CASE values. Walk the lists
8247 of case values, and if we find a mismatch, promote case_expr to
8248 the appropriate kind. */
8250 if (type
== BT_LOGICAL
|| type
== BT_INTEGER
)
8252 for (body
= code
->block
; body
; body
= body
->block
)
8254 /* Walk the case label list. */
8255 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8257 /* Intercept the DEFAULT case. It does not have a kind. */
8258 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8261 /* Unreachable case ranges are discarded, so ignore. */
8262 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8263 && cp
->low
!= cp
->high
8264 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8268 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->low
))
8269 gfc_convert_type_warn (case_expr
, &cp
->low
->ts
, 2, 0);
8271 if (cp
->high
!= NULL
8272 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->high
))
8273 gfc_convert_type_warn (case_expr
, &cp
->high
->ts
, 2, 0);
8278 /* Assume there is no DEFAULT case. */
8279 default_case
= NULL
;
8284 for (body
= code
->block
; body
; body
= body
->block
)
8286 /* Assume the CASE list is OK, and all CASE labels can be matched. */
8288 seen_unreachable
= 0;
8290 /* Walk the case label list, making sure that all case labels
8292 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8294 /* Count the number of cases in the whole construct. */
8297 /* Intercept the DEFAULT case. */
8298 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8300 if (default_case
!= NULL
)
8302 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8303 "by a second DEFAULT CASE at %L",
8304 &default_case
->where
, &cp
->where
);
8315 /* Deal with single value cases and case ranges. Errors are
8316 issued from the validation function. */
8317 if (!validate_case_label_expr (cp
->low
, case_expr
)
8318 || !validate_case_label_expr (cp
->high
, case_expr
))
8324 if (type
== BT_LOGICAL
8325 && ((cp
->low
== NULL
|| cp
->high
== NULL
)
8326 || cp
->low
!= cp
->high
))
8328 gfc_error ("Logical range in CASE statement at %L is not "
8329 "allowed", &cp
->low
->where
);
8334 if (type
== BT_LOGICAL
&& cp
->low
->expr_type
== EXPR_CONSTANT
)
8337 value
= cp
->low
->value
.logical
== 0 ? 2 : 1;
8338 if (value
& seen_logical
)
8340 gfc_error ("Constant logical value in CASE statement "
8341 "is repeated at %L",
8346 seen_logical
|= value
;
8349 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8350 && cp
->low
!= cp
->high
8351 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8353 if (warn_surprising
)
8354 gfc_warning (OPT_Wsurprising
,
8355 "Range specification at %L can never be matched",
8358 cp
->unreachable
= 1;
8359 seen_unreachable
= 1;
8363 /* If the case range can be matched, it can also overlap with
8364 other cases. To make sure it does not, we put it in a
8365 double linked list here. We sort that with a merge sort
8366 later on to detect any overlapping cases. */
8370 head
->right
= head
->left
= NULL
;
8375 tail
->right
->left
= tail
;
8382 /* It there was a failure in the previous case label, give up
8383 for this case label list. Continue with the next block. */
8387 /* See if any case labels that are unreachable have been seen.
8388 If so, we eliminate them. This is a bit of a kludge because
8389 the case lists for a single case statement (label) is a
8390 single forward linked lists. */
8391 if (seen_unreachable
)
8393 /* Advance until the first case in the list is reachable. */
8394 while (body
->ext
.block
.case_list
!= NULL
8395 && body
->ext
.block
.case_list
->unreachable
)
8397 gfc_case
*n
= body
->ext
.block
.case_list
;
8398 body
->ext
.block
.case_list
= body
->ext
.block
.case_list
->next
;
8400 gfc_free_case_list (n
);
8403 /* Strip all other unreachable cases. */
8404 if (body
->ext
.block
.case_list
)
8406 for (cp
= body
->ext
.block
.case_list
; cp
&& cp
->next
; cp
= cp
->next
)
8408 if (cp
->next
->unreachable
)
8410 gfc_case
*n
= cp
->next
;
8411 cp
->next
= cp
->next
->next
;
8413 gfc_free_case_list (n
);
8420 /* See if there were overlapping cases. If the check returns NULL,
8421 there was overlap. In that case we don't do anything. If head
8422 is non-NULL, we prepend the DEFAULT case. The sorted list can
8423 then used during code generation for SELECT CASE constructs with
8424 a case expression of a CHARACTER type. */
8427 head
= check_case_overlap (head
);
8429 /* Prepend the default_case if it is there. */
8430 if (head
!= NULL
&& default_case
)
8432 default_case
->left
= NULL
;
8433 default_case
->right
= head
;
8434 head
->left
= default_case
;
8438 /* Eliminate dead blocks that may be the result if we've seen
8439 unreachable case labels for a block. */
8440 for (body
= code
; body
&& body
->block
; body
= body
->block
)
8442 if (body
->block
->ext
.block
.case_list
== NULL
)
8444 /* Cut the unreachable block from the code chain. */
8445 gfc_code
*c
= body
->block
;
8446 body
->block
= c
->block
;
8448 /* Kill the dead block, but not the blocks below it. */
8450 gfc_free_statements (c
);
8454 /* More than two cases is legal but insane for logical selects.
8455 Issue a warning for it. */
8456 if (warn_surprising
&& type
== BT_LOGICAL
&& ncases
> 2)
8457 gfc_warning (OPT_Wsurprising
,
8458 "Logical SELECT CASE block at %L has more that two cases",
8463 /* Check if a derived type is extensible. */
8466 gfc_type_is_extensible (gfc_symbol
*sym
)
8468 return !(sym
->attr
.is_bind_c
|| sym
->attr
.sequence
8469 || (sym
->attr
.is_class
8470 && sym
->components
->ts
.u
.derived
->attr
.unlimited_polymorphic
));
8475 resolve_types (gfc_namespace
*ns
);
8477 /* Resolve an associate-name: Resolve target and ensure the type-spec is
8478 correct as well as possibly the array-spec. */
8481 resolve_assoc_var (gfc_symbol
* sym
, bool resolve_target
)
8485 gcc_assert (sym
->assoc
);
8486 gcc_assert (sym
->attr
.flavor
== FL_VARIABLE
);
8488 /* If this is for SELECT TYPE, the target may not yet be set. In that
8489 case, return. Resolution will be called later manually again when
8491 target
= sym
->assoc
->target
;
8494 gcc_assert (!sym
->assoc
->dangling
);
8496 if (resolve_target
&& !gfc_resolve_expr (target
))
8499 /* For variable targets, we get some attributes from the target. */
8500 if (target
->expr_type
== EXPR_VARIABLE
)
8504 gcc_assert (target
->symtree
);
8505 tsym
= target
->symtree
->n
.sym
;
8507 sym
->attr
.asynchronous
= tsym
->attr
.asynchronous
;
8508 sym
->attr
.volatile_
= tsym
->attr
.volatile_
;
8510 sym
->attr
.target
= tsym
->attr
.target
8511 || gfc_expr_attr (target
).pointer
;
8512 if (is_subref_array (target
))
8513 sym
->attr
.subref_array_pointer
= 1;
8516 if (target
->expr_type
== EXPR_NULL
)
8518 gfc_error ("Selector at %L cannot be NULL()", &target
->where
);
8521 else if (target
->ts
.type
== BT_UNKNOWN
)
8523 gfc_error ("Selector at %L has no type", &target
->where
);
8527 /* Get type if this was not already set. Note that it can be
8528 some other type than the target in case this is a SELECT TYPE
8529 selector! So we must not update when the type is already there. */
8530 if (sym
->ts
.type
== BT_UNKNOWN
)
8531 sym
->ts
= target
->ts
;
8533 gcc_assert (sym
->ts
.type
!= BT_UNKNOWN
);
8535 /* See if this is a valid association-to-variable. */
8536 sym
->assoc
->variable
= (target
->expr_type
== EXPR_VARIABLE
8537 && !gfc_has_vector_subscript (target
));
8539 /* Finally resolve if this is an array or not. */
8540 if (sym
->attr
.dimension
&& target
->rank
== 0)
8542 /* primary.c makes the assumption that a reference to an associate
8543 name followed by a left parenthesis is an array reference. */
8544 if (sym
->ts
.type
!= BT_CHARACTER
)
8545 gfc_error ("Associate-name %qs at %L is used as array",
8546 sym
->name
, &sym
->declared_at
);
8547 sym
->attr
.dimension
= 0;
8552 /* We cannot deal with class selectors that need temporaries. */
8553 if (target
->ts
.type
== BT_CLASS
8554 && gfc_ref_needs_temporary_p (target
->ref
))
8556 gfc_error ("CLASS selector at %L needs a temporary which is not "
8557 "yet implemented", &target
->where
);
8561 if (target
->ts
.type
== BT_CLASS
)
8562 gfc_fix_class_refs (target
);
8564 if (target
->rank
!= 0)
8567 /* The rank may be incorrectly guessed at parsing, therefore make sure
8568 it is corrected now. */
8569 if (sym
->ts
.type
!= BT_CLASS
&& (!sym
->as
|| sym
->assoc
->rankguessed
))
8572 sym
->as
= gfc_get_array_spec ();
8574 as
->rank
= target
->rank
;
8575 as
->type
= AS_DEFERRED
;
8576 as
->corank
= gfc_get_corank (target
);
8577 sym
->attr
.dimension
= 1;
8578 if (as
->corank
!= 0)
8579 sym
->attr
.codimension
= 1;
8584 /* target's rank is 0, but the type of the sym is still array valued,
8585 which has to be corrected. */
8586 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)
8589 symbol_attribute attr
;
8590 /* The associated variable's type is still the array type
8591 correct this now. */
8592 gfc_typespec
*ts
= &target
->ts
;
8595 for (ref
= target
->ref
; ref
!= NULL
; ref
= ref
->next
)
8600 ts
= &ref
->u
.c
.component
->ts
;
8603 if (ts
->type
== BT_CLASS
)
8604 ts
= &ts
->u
.derived
->components
->ts
;
8610 /* Create a scalar instance of the current class type. Because the
8611 rank of a class array goes into its name, the type has to be
8612 rebuild. The alternative of (re-)setting just the attributes
8613 and as in the current type, destroys the type also in other
8617 sym
->ts
.type
= BT_CLASS
;
8618 attr
= CLASS_DATA (sym
)->attr
;
8620 attr
.associate_var
= 1;
8621 attr
.dimension
= attr
.codimension
= 0;
8622 attr
.class_pointer
= 1;
8623 if (!gfc_build_class_symbol (&sym
->ts
, &attr
, &as
))
8625 /* Make sure the _vptr is set. */
8626 c
= gfc_find_component (sym
->ts
.u
.derived
, "_vptr", true, true, NULL
);
8627 if (c
->ts
.u
.derived
== NULL
)
8628 c
->ts
.u
.derived
= gfc_find_derived_vtab (sym
->ts
.u
.derived
);
8629 CLASS_DATA (sym
)->attr
.pointer
= 1;
8630 CLASS_DATA (sym
)->attr
.class_pointer
= 1;
8631 gfc_set_sym_referenced (sym
->ts
.u
.derived
);
8632 gfc_commit_symbol (sym
->ts
.u
.derived
);
8633 /* _vptr now has the _vtab in it, change it to the _vtype. */
8634 if (c
->ts
.u
.derived
->attr
.vtab
)
8635 c
->ts
.u
.derived
= c
->ts
.u
.derived
->ts
.u
.derived
;
8636 c
->ts
.u
.derived
->ns
->types_resolved
= 0;
8637 resolve_types (c
->ts
.u
.derived
->ns
);
8641 /* Mark this as an associate variable. */
8642 sym
->attr
.associate_var
= 1;
8644 /* Fix up the type-spec for CHARACTER types. */
8645 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.select_type_temporary
)
8648 sym
->ts
.u
.cl
= target
->ts
.u
.cl
;
8650 if (!sym
->ts
.u
.cl
->length
8651 && !sym
->ts
.deferred
8652 && target
->expr_type
== EXPR_CONSTANT
)
8654 sym
->ts
.u
.cl
->length
=
8655 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
8656 target
->value
.character
.length
);
8658 else if ((!sym
->ts
.u
.cl
->length
8659 || sym
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
)
8660 && target
->expr_type
!= EXPR_VARIABLE
)
8662 sym
->ts
.u
.cl
= gfc_get_charlen();
8663 sym
->ts
.deferred
= 1;
8665 /* This is reset in trans-stmt.c after the assignment
8666 of the target expression to the associate name. */
8667 sym
->attr
.allocatable
= 1;
8671 /* If the target is a good class object, so is the associate variable. */
8672 if (sym
->ts
.type
== BT_CLASS
&& gfc_expr_attr (target
).class_ok
)
8673 sym
->attr
.class_ok
= 1;
8677 /* Ensure that SELECT TYPE expressions have the correct rank and a full
8678 array reference, where necessary. The symbols are artificial and so
8679 the dimension attribute and arrayspec can also be set. In addition,
8680 sometimes the expr1 arrives as BT_DERIVED, when the symbol is BT_CLASS.
8681 This is corrected here as well.*/
8684 fixup_array_ref (gfc_expr
**expr1
, gfc_expr
*expr2
,
8685 int rank
, gfc_ref
*ref
)
8687 gfc_ref
*nref
= (*expr1
)->ref
;
8688 gfc_symbol
*sym1
= (*expr1
)->symtree
->n
.sym
;
8689 gfc_symbol
*sym2
= expr2
? expr2
->symtree
->n
.sym
: NULL
;
8690 (*expr1
)->rank
= rank
;
8691 if (sym1
->ts
.type
== BT_CLASS
)
8693 if ((*expr1
)->ts
.type
!= BT_CLASS
)
8694 (*expr1
)->ts
= sym1
->ts
;
8696 CLASS_DATA (sym1
)->attr
.dimension
= 1;
8697 if (CLASS_DATA (sym1
)->as
== NULL
&& sym2
)
8698 CLASS_DATA (sym1
)->as
8699 = gfc_copy_array_spec (CLASS_DATA (sym2
)->as
);
8703 sym1
->attr
.dimension
= 1;
8704 if (sym1
->as
== NULL
&& sym2
)
8705 sym1
->as
= gfc_copy_array_spec (sym2
->as
);
8708 for (; nref
; nref
= nref
->next
)
8709 if (nref
->next
== NULL
)
8712 if (ref
&& nref
&& nref
->type
!= REF_ARRAY
)
8713 nref
->next
= gfc_copy_ref (ref
);
8714 else if (ref
&& !nref
)
8715 (*expr1
)->ref
= gfc_copy_ref (ref
);
8720 build_loc_call (gfc_expr
*sym_expr
)
8723 loc_call
= gfc_get_expr ();
8724 loc_call
->expr_type
= EXPR_FUNCTION
;
8725 gfc_get_sym_tree ("_loc", gfc_current_ns
, &loc_call
->symtree
, false);
8726 loc_call
->symtree
->n
.sym
->attr
.flavor
= FL_PROCEDURE
;
8727 loc_call
->symtree
->n
.sym
->attr
.intrinsic
= 1;
8728 loc_call
->symtree
->n
.sym
->result
= loc_call
->symtree
->n
.sym
;
8729 gfc_commit_symbol (loc_call
->symtree
->n
.sym
);
8730 loc_call
->ts
.type
= BT_INTEGER
;
8731 loc_call
->ts
.kind
= gfc_index_integer_kind
;
8732 loc_call
->value
.function
.isym
= gfc_intrinsic_function_by_id (GFC_ISYM_LOC
);
8733 loc_call
->value
.function
.actual
= gfc_get_actual_arglist ();
8734 loc_call
->value
.function
.actual
->expr
= sym_expr
;
8735 loc_call
->where
= sym_expr
->where
;
8739 /* Resolve a SELECT TYPE statement. */
8742 resolve_select_type (gfc_code
*code
, gfc_namespace
*old_ns
)
8744 gfc_symbol
*selector_type
;
8745 gfc_code
*body
, *new_st
, *if_st
, *tail
;
8746 gfc_code
*class_is
= NULL
, *default_case
= NULL
;
8749 char name
[GFC_MAX_SYMBOL_LEN
];
8753 gfc_ref
* ref
= NULL
;
8754 gfc_expr
*selector_expr
= NULL
;
8756 ns
= code
->ext
.block
.ns
;
8759 /* Check for F03:C813. */
8760 if (code
->expr1
->ts
.type
!= BT_CLASS
8761 && !(code
->expr2
&& code
->expr2
->ts
.type
== BT_CLASS
))
8763 gfc_error ("Selector shall be polymorphic in SELECT TYPE statement "
8764 "at %L", &code
->loc
);
8768 if (!code
->expr1
->symtree
->n
.sym
->attr
.class_ok
)
8773 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
8774 code
->expr1
->symtree
->n
.sym
->ts
= code
->expr2
->ts
;
8775 selector_type
= CLASS_DATA (code
->expr2
)->ts
.u
.derived
;
8777 if (code
->expr2
->rank
&& CLASS_DATA (code
->expr1
)->as
)
8778 CLASS_DATA (code
->expr1
)->as
->rank
= code
->expr2
->rank
;
8780 /* F2008: C803 The selector expression must not be coindexed. */
8781 if (gfc_is_coindexed (code
->expr2
))
8783 gfc_error ("Selector at %L must not be coindexed",
8784 &code
->expr2
->where
);
8791 selector_type
= CLASS_DATA (code
->expr1
)->ts
.u
.derived
;
8793 if (gfc_is_coindexed (code
->expr1
))
8795 gfc_error ("Selector at %L must not be coindexed",
8796 &code
->expr1
->where
);
8801 /* Loop over TYPE IS / CLASS IS cases. */
8802 for (body
= code
->block
; body
; body
= body
->block
)
8804 c
= body
->ext
.block
.case_list
;
8808 /* Check for repeated cases. */
8809 for (tail
= code
->block
; tail
; tail
= tail
->block
)
8811 gfc_case
*d
= tail
->ext
.block
.case_list
;
8815 if (c
->ts
.type
== d
->ts
.type
8816 && ((c
->ts
.type
== BT_DERIVED
8817 && c
->ts
.u
.derived
&& d
->ts
.u
.derived
8818 && !strcmp (c
->ts
.u
.derived
->name
,
8819 d
->ts
.u
.derived
->name
))
8820 || c
->ts
.type
== BT_UNKNOWN
8821 || (!(c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8822 && c
->ts
.kind
== d
->ts
.kind
)))
8824 gfc_error ("TYPE IS at %L overlaps with TYPE IS at %L",
8825 &c
->where
, &d
->where
);
8831 /* Check F03:C815. */
8832 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8833 && !selector_type
->attr
.unlimited_polymorphic
8834 && !gfc_type_is_extensible (c
->ts
.u
.derived
))
8836 gfc_error ("Derived type %qs at %L must be extensible",
8837 c
->ts
.u
.derived
->name
, &c
->where
);
8842 /* Check F03:C816. */
8843 if (c
->ts
.type
!= BT_UNKNOWN
&& !selector_type
->attr
.unlimited_polymorphic
8844 && ((c
->ts
.type
!= BT_DERIVED
&& c
->ts
.type
!= BT_CLASS
)
8845 || !gfc_type_is_extension_of (selector_type
, c
->ts
.u
.derived
)))
8847 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8848 gfc_error ("Derived type %qs at %L must be an extension of %qs",
8849 c
->ts
.u
.derived
->name
, &c
->where
, selector_type
->name
);
8851 gfc_error ("Unexpected intrinsic type %qs at %L",
8852 gfc_basic_typename (c
->ts
.type
), &c
->where
);
8857 /* Check F03:C814. */
8858 if (c
->ts
.type
== BT_CHARACTER
8859 && (c
->ts
.u
.cl
->length
!= NULL
|| c
->ts
.deferred
))
8861 gfc_error ("The type-spec at %L shall specify that each length "
8862 "type parameter is assumed", &c
->where
);
8867 /* Intercept the DEFAULT case. */
8868 if (c
->ts
.type
== BT_UNKNOWN
)
8870 /* Check F03:C818. */
8873 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8874 "by a second DEFAULT CASE at %L",
8875 &default_case
->ext
.block
.case_list
->where
, &c
->where
);
8880 default_case
= body
;
8887 /* Transform SELECT TYPE statement to BLOCK and associate selector to
8888 target if present. If there are any EXIT statements referring to the
8889 SELECT TYPE construct, this is no problem because the gfc_code
8890 reference stays the same and EXIT is equally possible from the BLOCK
8891 it is changed to. */
8892 code
->op
= EXEC_BLOCK
;
8895 gfc_association_list
* assoc
;
8897 assoc
= gfc_get_association_list ();
8898 assoc
->st
= code
->expr1
->symtree
;
8899 assoc
->target
= gfc_copy_expr (code
->expr2
);
8900 assoc
->target
->where
= code
->expr2
->where
;
8901 /* assoc->variable will be set by resolve_assoc_var. */
8903 code
->ext
.block
.assoc
= assoc
;
8904 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
8906 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
8909 code
->ext
.block
.assoc
= NULL
;
8911 /* Ensure that the selector rank and arrayspec are available to
8912 correct expressions in which they might be missing. */
8913 if (code
->expr2
&& code
->expr2
->rank
)
8915 rank
= code
->expr2
->rank
;
8916 for (ref
= code
->expr2
->ref
; ref
; ref
= ref
->next
)
8917 if (ref
->next
== NULL
)
8919 if (ref
&& ref
->type
== REF_ARRAY
)
8920 ref
= gfc_copy_ref (ref
);
8922 /* Fixup expr1 if necessary. */
8924 fixup_array_ref (&code
->expr1
, code
->expr2
, rank
, ref
);
8926 else if (code
->expr1
->rank
)
8928 rank
= code
->expr1
->rank
;
8929 for (ref
= code
->expr1
->ref
; ref
; ref
= ref
->next
)
8930 if (ref
->next
== NULL
)
8932 if (ref
&& ref
->type
== REF_ARRAY
)
8933 ref
= gfc_copy_ref (ref
);
8936 /* Add EXEC_SELECT to switch on type. */
8937 new_st
= gfc_get_code (code
->op
);
8938 new_st
->expr1
= code
->expr1
;
8939 new_st
->expr2
= code
->expr2
;
8940 new_st
->block
= code
->block
;
8941 code
->expr1
= code
->expr2
= NULL
;
8946 ns
->code
->next
= new_st
;
8948 code
->op
= EXEC_SELECT_TYPE
;
8950 /* Use the intrinsic LOC function to generate an integer expression
8951 for the vtable of the selector. Note that the rank of the selector
8952 expression has to be set to zero. */
8953 gfc_add_vptr_component (code
->expr1
);
8954 code
->expr1
->rank
= 0;
8955 code
->expr1
= build_loc_call (code
->expr1
);
8956 selector_expr
= code
->expr1
->value
.function
.actual
->expr
;
8958 /* Loop over TYPE IS / CLASS IS cases. */
8959 for (body
= code
->block
; body
; body
= body
->block
)
8963 c
= body
->ext
.block
.case_list
;
8965 /* Generate an index integer expression for address of the
8966 TYPE/CLASS vtable and store it in c->low. The hash expression
8967 is stored in c->high and is used to resolve intrinsic cases. */
8968 if (c
->ts
.type
!= BT_UNKNOWN
)
8970 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8972 vtab
= gfc_find_derived_vtab (c
->ts
.u
.derived
);
8974 c
->high
= gfc_get_int_expr (gfc_integer_4_kind
, NULL
,
8975 c
->ts
.u
.derived
->hash_value
);
8979 vtab
= gfc_find_vtab (&c
->ts
);
8980 gcc_assert (vtab
&& CLASS_DATA (vtab
)->initializer
);
8981 e
= CLASS_DATA (vtab
)->initializer
;
8982 c
->high
= gfc_copy_expr (e
);
8983 if (c
->high
->ts
.kind
!= gfc_integer_4_kind
)
8986 ts
.kind
= gfc_integer_4_kind
;
8987 ts
.type
= BT_INTEGER
;
8988 gfc_convert_type_warn (c
->high
, &ts
, 2, 0);
8992 e
= gfc_lval_expr_from_sym (vtab
);
8993 c
->low
= build_loc_call (e
);
8998 /* Associate temporary to selector. This should only be done
8999 when this case is actually true, so build a new ASSOCIATE
9000 that does precisely this here (instead of using the
9003 if (c
->ts
.type
== BT_CLASS
)
9004 sprintf (name
, "__tmp_class_%s", c
->ts
.u
.derived
->name
);
9005 else if (c
->ts
.type
== BT_DERIVED
)
9006 sprintf (name
, "__tmp_type_%s", c
->ts
.u
.derived
->name
);
9007 else if (c
->ts
.type
== BT_CHARACTER
)
9009 HOST_WIDE_INT charlen
= 0;
9010 if (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9011 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9012 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9013 snprintf (name
, sizeof (name
),
9014 "__tmp_%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9015 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9018 sprintf (name
, "__tmp_%s_%d", gfc_basic_typename (c
->ts
.type
),
9021 st
= gfc_find_symtree (ns
->sym_root
, name
);
9022 gcc_assert (st
->n
.sym
->assoc
);
9023 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9024 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9025 if (c
->ts
.type
!= BT_CLASS
&& c
->ts
.type
!= BT_UNKNOWN
)
9027 gfc_add_data_component (st
->n
.sym
->assoc
->target
);
9028 /* Fixup the target expression if necessary. */
9030 fixup_array_ref (&st
->n
.sym
->assoc
->target
, NULL
, rank
, ref
);
9033 new_st
= gfc_get_code (EXEC_BLOCK
);
9034 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9035 new_st
->ext
.block
.ns
->code
= body
->next
;
9036 body
->next
= new_st
;
9038 /* Chain in the new list only if it is marked as dangling. Otherwise
9039 there is a CASE label overlap and this is already used. Just ignore,
9040 the error is diagnosed elsewhere. */
9041 if (st
->n
.sym
->assoc
->dangling
)
9043 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9044 st
->n
.sym
->assoc
->dangling
= 0;
9047 resolve_assoc_var (st
->n
.sym
, false);
9050 /* Take out CLASS IS cases for separate treatment. */
9052 while (body
&& body
->block
)
9054 if (body
->block
->ext
.block
.case_list
->ts
.type
== BT_CLASS
)
9056 /* Add to class_is list. */
9057 if (class_is
== NULL
)
9059 class_is
= body
->block
;
9064 for (tail
= class_is
; tail
->block
; tail
= tail
->block
) ;
9065 tail
->block
= body
->block
;
9068 /* Remove from EXEC_SELECT list. */
9069 body
->block
= body
->block
->block
;
9082 /* Add a default case to hold the CLASS IS cases. */
9083 for (tail
= code
; tail
->block
; tail
= tail
->block
) ;
9084 tail
->block
= gfc_get_code (EXEC_SELECT_TYPE
);
9086 tail
->ext
.block
.case_list
= gfc_get_case ();
9087 tail
->ext
.block
.case_list
->ts
.type
= BT_UNKNOWN
;
9089 default_case
= tail
;
9092 /* More than one CLASS IS block? */
9093 if (class_is
->block
)
9097 /* Sort CLASS IS blocks by extension level. */
9101 for (c1
= &class_is
; (*c1
) && (*c1
)->block
; c1
= &((*c1
)->block
))
9104 /* F03:C817 (check for doubles). */
9105 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->hash_value
9106 == c2
->ext
.block
.case_list
->ts
.u
.derived
->hash_value
)
9108 gfc_error ("Double CLASS IS block in SELECT TYPE "
9110 &c2
->ext
.block
.case_list
->where
);
9113 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
9114 < c2
->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
)
9117 (*c1
)->block
= c2
->block
;
9127 /* Generate IF chain. */
9128 if_st
= gfc_get_code (EXEC_IF
);
9130 for (body
= class_is
; body
; body
= body
->block
)
9132 new_st
->block
= gfc_get_code (EXEC_IF
);
9133 new_st
= new_st
->block
;
9134 /* Set up IF condition: Call _gfortran_is_extension_of. */
9135 new_st
->expr1
= gfc_get_expr ();
9136 new_st
->expr1
->expr_type
= EXPR_FUNCTION
;
9137 new_st
->expr1
->ts
.type
= BT_LOGICAL
;
9138 new_st
->expr1
->ts
.kind
= 4;
9139 new_st
->expr1
->value
.function
.name
= gfc_get_string (PREFIX ("is_extension_of"));
9140 new_st
->expr1
->value
.function
.isym
= XCNEW (gfc_intrinsic_sym
);
9141 new_st
->expr1
->value
.function
.isym
->id
= GFC_ISYM_EXTENDS_TYPE_OF
;
9142 /* Set up arguments. */
9143 new_st
->expr1
->value
.function
.actual
= gfc_get_actual_arglist ();
9144 new_st
->expr1
->value
.function
.actual
->expr
= gfc_get_variable_expr (selector_expr
->symtree
);
9145 new_st
->expr1
->value
.function
.actual
->expr
->where
= code
->loc
;
9146 new_st
->expr1
->where
= code
->loc
;
9147 gfc_add_vptr_component (new_st
->expr1
->value
.function
.actual
->expr
);
9148 vtab
= gfc_find_derived_vtab (body
->ext
.block
.case_list
->ts
.u
.derived
);
9149 st
= gfc_find_symtree (vtab
->ns
->sym_root
, vtab
->name
);
9150 new_st
->expr1
->value
.function
.actual
->next
= gfc_get_actual_arglist ();
9151 new_st
->expr1
->value
.function
.actual
->next
->expr
= gfc_get_variable_expr (st
);
9152 new_st
->expr1
->value
.function
.actual
->next
->expr
->where
= code
->loc
;
9153 new_st
->next
= body
->next
;
9155 if (default_case
->next
)
9157 new_st
->block
= gfc_get_code (EXEC_IF
);
9158 new_st
= new_st
->block
;
9159 new_st
->next
= default_case
->next
;
9162 /* Replace CLASS DEFAULT code by the IF chain. */
9163 default_case
->next
= if_st
;
9166 /* Resolve the internal code. This can not be done earlier because
9167 it requires that the sym->assoc of selectors is set already. */
9168 gfc_current_ns
= ns
;
9169 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9170 gfc_current_ns
= old_ns
;
9177 /* Resolve a transfer statement. This is making sure that:
9178 -- a derived type being transferred has only non-pointer components
9179 -- a derived type being transferred doesn't have private components, unless
9180 it's being transferred from the module where the type was defined
9181 -- we're not trying to transfer a whole assumed size array. */
9184 resolve_transfer (gfc_code
*code
)
9187 gfc_symbol
*sym
, *derived
;
9191 bool formatted
= false;
9192 gfc_dt
*dt
= code
->ext
.dt
;
9193 gfc_symbol
*dtio_sub
= NULL
;
9197 while (exp
!= NULL
&& exp
->expr_type
== EXPR_OP
9198 && exp
->value
.op
.op
== INTRINSIC_PARENTHESES
)
9199 exp
= exp
->value
.op
.op1
;
9201 if (exp
&& exp
->expr_type
== EXPR_NULL
9204 gfc_error ("Invalid context for NULL () intrinsic at %L",
9209 if (exp
== NULL
|| (exp
->expr_type
!= EXPR_VARIABLE
9210 && exp
->expr_type
!= EXPR_FUNCTION
9211 && exp
->expr_type
!= EXPR_STRUCTURE
))
9214 /* If we are reading, the variable will be changed. Note that
9215 code->ext.dt may be NULL if the TRANSFER is related to
9216 an INQUIRE statement -- but in this case, we are not reading, either. */
9217 if (dt
&& dt
->dt_io_kind
->value
.iokind
== M_READ
9218 && !gfc_check_vardef_context (exp
, false, false, false,
9222 ts
= exp
->expr_type
== EXPR_STRUCTURE
? &exp
->ts
: &exp
->symtree
->n
.sym
->ts
;
9224 /* Go to actual component transferred. */
9225 for (ref
= exp
->ref
; ref
; ref
= ref
->next
)
9226 if (ref
->type
== REF_COMPONENT
)
9227 ts
= &ref
->u
.c
.component
->ts
;
9229 if (dt
&& dt
->dt_io_kind
->value
.iokind
!= M_INQUIRE
9230 && (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
))
9232 if (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
)
9233 derived
= ts
->u
.derived
;
9235 derived
= ts
->u
.derived
->components
->ts
.u
.derived
;
9237 /* Determine when to use the formatted DTIO procedure. */
9238 if (dt
&& (dt
->format_expr
|| dt
->format_label
))
9241 write
= dt
->dt_io_kind
->value
.iokind
== M_WRITE
9242 || dt
->dt_io_kind
->value
.iokind
== M_PRINT
;
9243 dtio_sub
= gfc_find_specific_dtio_proc (derived
, write
, formatted
);
9245 if (dtio_sub
!= NULL
&& exp
->expr_type
== EXPR_VARIABLE
)
9248 sym
= exp
->symtree
->n
.sym
->ns
->proc_name
;
9249 /* Check to see if this is a nested DTIO call, with the
9250 dummy as the io-list object. */
9251 if (sym
&& sym
== dtio_sub
&& sym
->formal
9252 && sym
->formal
->sym
== exp
->symtree
->n
.sym
9253 && exp
->ref
== NULL
)
9255 if (!sym
->attr
.recursive
)
9257 gfc_error ("DTIO %s procedure at %L must be recursive",
9258 sym
->name
, &sym
->declared_at
);
9265 if (ts
->type
== BT_CLASS
&& dtio_sub
== NULL
)
9267 gfc_error ("Data transfer element at %L cannot be polymorphic unless "
9268 "it is processed by a defined input/output procedure",
9273 if (ts
->type
== BT_DERIVED
)
9275 /* Check that transferred derived type doesn't contain POINTER
9276 components unless it is processed by a defined input/output
9278 if (ts
->u
.derived
->attr
.pointer_comp
&& dtio_sub
== NULL
)
9280 gfc_error ("Data transfer element at %L cannot have POINTER "
9281 "components unless it is processed by a defined "
9282 "input/output procedure", &code
->loc
);
9287 if (ts
->u
.derived
->attr
.proc_pointer_comp
)
9289 gfc_error ("Data transfer element at %L cannot have "
9290 "procedure pointer components", &code
->loc
);
9294 if (ts
->u
.derived
->attr
.alloc_comp
&& dtio_sub
== NULL
)
9296 gfc_error ("Data transfer element at %L cannot have ALLOCATABLE "
9297 "components unless it is processed by a defined "
9298 "input/output procedure", &code
->loc
);
9302 /* C_PTR and C_FUNPTR have private components which means they can not
9303 be printed. However, if -std=gnu and not -pedantic, allow
9304 the component to be printed to help debugging. */
9305 if (ts
->u
.derived
->ts
.f90_type
== BT_VOID
)
9307 if (!gfc_notify_std (GFC_STD_GNU
, "Data transfer element at %L "
9308 "cannot have PRIVATE components", &code
->loc
))
9311 else if (derived_inaccessible (ts
->u
.derived
) && dtio_sub
== NULL
)
9313 gfc_error ("Data transfer element at %L cannot have "
9314 "PRIVATE components unless it is processed by "
9315 "a defined input/output procedure", &code
->loc
);
9320 if (exp
->expr_type
== EXPR_STRUCTURE
)
9323 sym
= exp
->symtree
->n
.sym
;
9325 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SIZE
&& exp
->ref
9326 && exp
->ref
->type
== REF_ARRAY
&& exp
->ref
->u
.ar
.type
== AR_FULL
)
9328 gfc_error ("Data transfer element at %L cannot be a full reference to "
9329 "an assumed-size array", &code
->loc
);
9333 if (async_io_dt
&& exp
->expr_type
== EXPR_VARIABLE
)
9334 exp
->symtree
->n
.sym
->attr
.asynchronous
= 1;
9338 /*********** Toplevel code resolution subroutines ***********/
9340 /* Find the set of labels that are reachable from this block. We also
9341 record the last statement in each block. */
9344 find_reachable_labels (gfc_code
*block
)
9351 cs_base
->reachable_labels
= bitmap_alloc (&labels_obstack
);
9353 /* Collect labels in this block. We don't keep those corresponding
9354 to END {IF|SELECT}, these are checked in resolve_branch by going
9355 up through the code_stack. */
9356 for (c
= block
; c
; c
= c
->next
)
9358 if (c
->here
&& c
->op
!= EXEC_END_NESTED_BLOCK
)
9359 bitmap_set_bit (cs_base
->reachable_labels
, c
->here
->value
);
9362 /* Merge with labels from parent block. */
9365 gcc_assert (cs_base
->prev
->reachable_labels
);
9366 bitmap_ior_into (cs_base
->reachable_labels
,
9367 cs_base
->prev
->reachable_labels
);
9373 resolve_lock_unlock_event (gfc_code
*code
)
9375 if (code
->expr1
->expr_type
== EXPR_FUNCTION
9376 && code
->expr1
->value
.function
.isym
9377 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
9378 remove_caf_get_intrinsic (code
->expr1
);
9380 if ((code
->op
== EXEC_LOCK
|| code
->op
== EXEC_UNLOCK
)
9381 && (code
->expr1
->ts
.type
!= BT_DERIVED
9382 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9383 || code
->expr1
->ts
.u
.derived
->from_intmod
!= INTMOD_ISO_FORTRAN_ENV
9384 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
!= ISOFORTRAN_LOCK_TYPE
9385 || code
->expr1
->rank
!= 0
9386 || (!gfc_is_coarray (code
->expr1
) &&
9387 !gfc_is_coindexed (code
->expr1
))))
9388 gfc_error ("Lock variable at %L must be a scalar of type LOCK_TYPE",
9389 &code
->expr1
->where
);
9390 else if ((code
->op
== EXEC_EVENT_POST
|| code
->op
== EXEC_EVENT_WAIT
)
9391 && (code
->expr1
->ts
.type
!= BT_DERIVED
9392 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9393 || code
->expr1
->ts
.u
.derived
->from_intmod
9394 != INTMOD_ISO_FORTRAN_ENV
9395 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
9396 != ISOFORTRAN_EVENT_TYPE
9397 || code
->expr1
->rank
!= 0))
9398 gfc_error ("Event variable at %L must be a scalar of type EVENT_TYPE",
9399 &code
->expr1
->where
);
9400 else if (code
->op
== EXEC_EVENT_POST
&& !gfc_is_coarray (code
->expr1
)
9401 && !gfc_is_coindexed (code
->expr1
))
9402 gfc_error ("Event variable argument at %L must be a coarray or coindexed",
9403 &code
->expr1
->where
);
9404 else if (code
->op
== EXEC_EVENT_WAIT
&& !gfc_is_coarray (code
->expr1
))
9405 gfc_error ("Event variable argument at %L must be a coarray but not "
9406 "coindexed", &code
->expr1
->where
);
9410 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9411 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9412 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9413 &code
->expr2
->where
);
9416 && !gfc_check_vardef_context (code
->expr2
, false, false, false,
9417 _("STAT variable")))
9422 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9423 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9424 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9425 &code
->expr3
->where
);
9428 && !gfc_check_vardef_context (code
->expr3
, false, false, false,
9429 _("ERRMSG variable")))
9432 /* Check for LOCK the ACQUIRED_LOCK. */
9433 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9434 && (code
->expr4
->ts
.type
!= BT_LOGICAL
|| code
->expr4
->rank
!= 0
9435 || code
->expr4
->expr_type
!= EXPR_VARIABLE
))
9436 gfc_error ("ACQUIRED_LOCK= argument at %L must be a scalar LOGICAL "
9437 "variable", &code
->expr4
->where
);
9439 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9440 && !gfc_check_vardef_context (code
->expr4
, false, false, false,
9441 _("ACQUIRED_LOCK variable")))
9444 /* Check for EVENT WAIT the UNTIL_COUNT. */
9445 if (code
->op
== EXEC_EVENT_WAIT
&& code
->expr4
)
9447 if (!gfc_resolve_expr (code
->expr4
) || code
->expr4
->ts
.type
!= BT_INTEGER
9448 || code
->expr4
->rank
!= 0)
9449 gfc_error ("UNTIL_COUNT= argument at %L must be a scalar INTEGER "
9450 "expression", &code
->expr4
->where
);
9456 resolve_critical (gfc_code
*code
)
9458 gfc_symtree
*symtree
;
9459 gfc_symbol
*lock_type
;
9460 char name
[GFC_MAX_SYMBOL_LEN
];
9461 static int serial
= 0;
9463 if (flag_coarray
!= GFC_FCOARRAY_LIB
)
9466 symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
9467 GFC_PREFIX ("lock_type"));
9469 lock_type
= symtree
->n
.sym
;
9472 if (gfc_get_sym_tree (GFC_PREFIX ("lock_type"), gfc_current_ns
, &symtree
,
9475 lock_type
= symtree
->n
.sym
;
9476 lock_type
->attr
.flavor
= FL_DERIVED
;
9477 lock_type
->attr
.zero_comp
= 1;
9478 lock_type
->from_intmod
= INTMOD_ISO_FORTRAN_ENV
;
9479 lock_type
->intmod_sym_id
= ISOFORTRAN_LOCK_TYPE
;
9482 sprintf(name
, GFC_PREFIX ("lock_var") "%d",serial
++);
9483 if (gfc_get_sym_tree (name
, gfc_current_ns
, &symtree
, false) != 0)
9486 code
->resolved_sym
= symtree
->n
.sym
;
9487 symtree
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
9488 symtree
->n
.sym
->attr
.referenced
= 1;
9489 symtree
->n
.sym
->attr
.artificial
= 1;
9490 symtree
->n
.sym
->attr
.codimension
= 1;
9491 symtree
->n
.sym
->ts
.type
= BT_DERIVED
;
9492 symtree
->n
.sym
->ts
.u
.derived
= lock_type
;
9493 symtree
->n
.sym
->as
= gfc_get_array_spec ();
9494 symtree
->n
.sym
->as
->corank
= 1;
9495 symtree
->n
.sym
->as
->type
= AS_EXPLICIT
;
9496 symtree
->n
.sym
->as
->cotype
= AS_EXPLICIT
;
9497 symtree
->n
.sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
,
9499 gfc_commit_symbols();
9504 resolve_sync (gfc_code
*code
)
9506 /* Check imageset. The * case matches expr1 == NULL. */
9509 if (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
> 1)
9510 gfc_error ("Imageset argument at %L must be a scalar or rank-1 "
9511 "INTEGER expression", &code
->expr1
->where
);
9512 if (code
->expr1
->expr_type
== EXPR_CONSTANT
&& code
->expr1
->rank
== 0
9513 && mpz_cmp_si (code
->expr1
->value
.integer
, 1) < 0)
9514 gfc_error ("Imageset argument at %L must between 1 and num_images()",
9515 &code
->expr1
->where
);
9516 else if (code
->expr1
->expr_type
== EXPR_ARRAY
9517 && gfc_simplify_expr (code
->expr1
, 0))
9519 gfc_constructor
*cons
;
9520 cons
= gfc_constructor_first (code
->expr1
->value
.constructor
);
9521 for (; cons
; cons
= gfc_constructor_next (cons
))
9522 if (cons
->expr
->expr_type
== EXPR_CONSTANT
9523 && mpz_cmp_si (cons
->expr
->value
.integer
, 1) < 0)
9524 gfc_error ("Imageset argument at %L must between 1 and "
9525 "num_images()", &cons
->expr
->where
);
9530 gfc_resolve_expr (code
->expr2
);
9532 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9533 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9534 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9535 &code
->expr2
->where
);
9538 gfc_resolve_expr (code
->expr3
);
9540 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9541 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9542 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9543 &code
->expr3
->where
);
9547 /* Given a branch to a label, see if the branch is conforming.
9548 The code node describes where the branch is located. */
9551 resolve_branch (gfc_st_label
*label
, gfc_code
*code
)
9558 /* Step one: is this a valid branching target? */
9560 if (label
->defined
== ST_LABEL_UNKNOWN
)
9562 gfc_error ("Label %d referenced at %L is never defined", label
->value
,
9567 if (label
->defined
!= ST_LABEL_TARGET
&& label
->defined
!= ST_LABEL_DO_TARGET
)
9569 gfc_error ("Statement at %L is not a valid branch target statement "
9570 "for the branch statement at %L", &label
->where
, &code
->loc
);
9574 /* Step two: make sure this branch is not a branch to itself ;-) */
9576 if (code
->here
== label
)
9579 "Branch at %L may result in an infinite loop", &code
->loc
);
9583 /* Step three: See if the label is in the same block as the
9584 branching statement. The hard work has been done by setting up
9585 the bitmap reachable_labels. */
9587 if (bitmap_bit_p (cs_base
->reachable_labels
, label
->value
))
9589 /* Check now whether there is a CRITICAL construct; if so, check
9590 whether the label is still visible outside of the CRITICAL block,
9591 which is invalid. */
9592 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9594 if (stack
->current
->op
== EXEC_CRITICAL
9595 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9596 gfc_error ("GOTO statement at %L leaves CRITICAL construct for "
9597 "label at %L", &code
->loc
, &label
->where
);
9598 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
9599 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9600 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct "
9601 "for label at %L", &code
->loc
, &label
->where
);
9607 /* Step four: If we haven't found the label in the bitmap, it may
9608 still be the label of the END of the enclosing block, in which
9609 case we find it by going up the code_stack. */
9611 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9613 if (stack
->current
->next
&& stack
->current
->next
->here
== label
)
9615 if (stack
->current
->op
== EXEC_CRITICAL
)
9617 /* Note: A label at END CRITICAL does not leave the CRITICAL
9618 construct as END CRITICAL is still part of it. */
9619 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
9620 " at %L", &code
->loc
, &label
->where
);
9623 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
)
9625 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct for "
9626 "label at %L", &code
->loc
, &label
->where
);
9633 gcc_assert (stack
->current
->next
->op
== EXEC_END_NESTED_BLOCK
);
9637 /* The label is not in an enclosing block, so illegal. This was
9638 allowed in Fortran 66, so we allow it as extension. No
9639 further checks are necessary in this case. */
9640 gfc_notify_std (GFC_STD_LEGACY
, "Label at %L is not in the same block "
9641 "as the GOTO statement at %L", &label
->where
,
9647 /* Check whether EXPR1 has the same shape as EXPR2. */
9650 resolve_where_shape (gfc_expr
*expr1
, gfc_expr
*expr2
)
9652 mpz_t shape
[GFC_MAX_DIMENSIONS
];
9653 mpz_t shape2
[GFC_MAX_DIMENSIONS
];
9654 bool result
= false;
9657 /* Compare the rank. */
9658 if (expr1
->rank
!= expr2
->rank
)
9661 /* Compare the size of each dimension. */
9662 for (i
=0; i
<expr1
->rank
; i
++)
9664 if (!gfc_array_dimen_size (expr1
, i
, &shape
[i
]))
9667 if (!gfc_array_dimen_size (expr2
, i
, &shape2
[i
]))
9670 if (mpz_cmp (shape
[i
], shape2
[i
]))
9674 /* When either of the two expression is an assumed size array, we
9675 ignore the comparison of dimension sizes. */
9680 gfc_clear_shape (shape
, i
);
9681 gfc_clear_shape (shape2
, i
);
9686 /* Check whether a WHERE assignment target or a WHERE mask expression
9687 has the same shape as the outmost WHERE mask expression. */
9690 resolve_where (gfc_code
*code
, gfc_expr
*mask
)
9696 cblock
= code
->block
;
9698 /* Store the first WHERE mask-expr of the WHERE statement or construct.
9699 In case of nested WHERE, only the outmost one is stored. */
9700 if (mask
== NULL
) /* outmost WHERE */
9702 else /* inner WHERE */
9709 /* Check if the mask-expr has a consistent shape with the
9710 outmost WHERE mask-expr. */
9711 if (!resolve_where_shape (cblock
->expr1
, e
))
9712 gfc_error ("WHERE mask at %L has inconsistent shape",
9713 &cblock
->expr1
->where
);
9716 /* the assignment statement of a WHERE statement, or the first
9717 statement in where-body-construct of a WHERE construct */
9718 cnext
= cblock
->next
;
9723 /* WHERE assignment statement */
9726 /* Check shape consistent for WHERE assignment target. */
9727 if (e
&& !resolve_where_shape (cnext
->expr1
, e
))
9728 gfc_error ("WHERE assignment target at %L has "
9729 "inconsistent shape", &cnext
->expr1
->where
);
9733 case EXEC_ASSIGN_CALL
:
9734 resolve_call (cnext
);
9735 if (!cnext
->resolved_sym
->attr
.elemental
)
9736 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9737 &cnext
->ext
.actual
->expr
->where
);
9740 /* WHERE or WHERE construct is part of a where-body-construct */
9742 resolve_where (cnext
, e
);
9746 gfc_error ("Unsupported statement inside WHERE at %L",
9749 /* the next statement within the same where-body-construct */
9750 cnext
= cnext
->next
;
9752 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
9753 cblock
= cblock
->block
;
9758 /* Resolve assignment in FORALL construct.
9759 NVAR is the number of FORALL index variables, and VAR_EXPR records the
9760 FORALL index variables. */
9763 gfc_resolve_assign_in_forall (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
9767 for (n
= 0; n
< nvar
; n
++)
9769 gfc_symbol
*forall_index
;
9771 forall_index
= var_expr
[n
]->symtree
->n
.sym
;
9773 /* Check whether the assignment target is one of the FORALL index
9775 if ((code
->expr1
->expr_type
== EXPR_VARIABLE
)
9776 && (code
->expr1
->symtree
->n
.sym
== forall_index
))
9777 gfc_error ("Assignment to a FORALL index variable at %L",
9778 &code
->expr1
->where
);
9781 /* If one of the FORALL index variables doesn't appear in the
9782 assignment variable, then there could be a many-to-one
9783 assignment. Emit a warning rather than an error because the
9784 mask could be resolving this problem. */
9785 if (!find_forall_index (code
->expr1
, forall_index
, 0))
9786 gfc_warning (0, "The FORALL with index %qs is not used on the "
9787 "left side of the assignment at %L and so might "
9788 "cause multiple assignment to this object",
9789 var_expr
[n
]->symtree
->name
, &code
->expr1
->where
);
9795 /* Resolve WHERE statement in FORALL construct. */
9798 gfc_resolve_where_code_in_forall (gfc_code
*code
, int nvar
,
9799 gfc_expr
**var_expr
)
9804 cblock
= code
->block
;
9807 /* the assignment statement of a WHERE statement, or the first
9808 statement in where-body-construct of a WHERE construct */
9809 cnext
= cblock
->next
;
9814 /* WHERE assignment statement */
9816 gfc_resolve_assign_in_forall (cnext
, nvar
, var_expr
);
9819 /* WHERE operator assignment statement */
9820 case EXEC_ASSIGN_CALL
:
9821 resolve_call (cnext
);
9822 if (!cnext
->resolved_sym
->attr
.elemental
)
9823 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9824 &cnext
->ext
.actual
->expr
->where
);
9827 /* WHERE or WHERE construct is part of a where-body-construct */
9829 gfc_resolve_where_code_in_forall (cnext
, nvar
, var_expr
);
9833 gfc_error ("Unsupported statement inside WHERE at %L",
9836 /* the next statement within the same where-body-construct */
9837 cnext
= cnext
->next
;
9839 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
9840 cblock
= cblock
->block
;
9845 /* Traverse the FORALL body to check whether the following errors exist:
9846 1. For assignment, check if a many-to-one assignment happens.
9847 2. For WHERE statement, check the WHERE body to see if there is any
9848 many-to-one assignment. */
9851 gfc_resolve_forall_body (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
9855 c
= code
->block
->next
;
9861 case EXEC_POINTER_ASSIGN
:
9862 gfc_resolve_assign_in_forall (c
, nvar
, var_expr
);
9865 case EXEC_ASSIGN_CALL
:
9869 /* Because the gfc_resolve_blocks() will handle the nested FORALL,
9870 there is no need to handle it here. */
9874 gfc_resolve_where_code_in_forall(c
, nvar
, var_expr
);
9879 /* The next statement in the FORALL body. */
9885 /* Counts the number of iterators needed inside a forall construct, including
9886 nested forall constructs. This is used to allocate the needed memory
9887 in gfc_resolve_forall. */
9890 gfc_count_forall_iterators (gfc_code
*code
)
9892 int max_iters
, sub_iters
, current_iters
;
9893 gfc_forall_iterator
*fa
;
9895 gcc_assert(code
->op
== EXEC_FORALL
);
9899 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
9902 code
= code
->block
->next
;
9906 if (code
->op
== EXEC_FORALL
)
9908 sub_iters
= gfc_count_forall_iterators (code
);
9909 if (sub_iters
> max_iters
)
9910 max_iters
= sub_iters
;
9915 return current_iters
+ max_iters
;
9919 /* Given a FORALL construct, first resolve the FORALL iterator, then call
9920 gfc_resolve_forall_body to resolve the FORALL body. */
9923 gfc_resolve_forall (gfc_code
*code
, gfc_namespace
*ns
, int forall_save
)
9925 static gfc_expr
**var_expr
;
9926 static int total_var
= 0;
9927 static int nvar
= 0;
9928 int i
, old_nvar
, tmp
;
9929 gfc_forall_iterator
*fa
;
9933 /* Start to resolve a FORALL construct */
9934 if (forall_save
== 0)
9936 /* Count the total number of FORALL indices in the nested FORALL
9937 construct in order to allocate the VAR_EXPR with proper size. */
9938 total_var
= gfc_count_forall_iterators (code
);
9940 /* Allocate VAR_EXPR with NUMBER_OF_FORALL_INDEX elements. */
9941 var_expr
= XCNEWVEC (gfc_expr
*, total_var
);
9944 /* The information about FORALL iterator, including FORALL indices start, end
9945 and stride. An outer FORALL indice cannot appear in start, end or stride. */
9946 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
9948 /* Fortran 20008: C738 (R753). */
9949 if (fa
->var
->ref
&& fa
->var
->ref
->type
== REF_ARRAY
)
9951 gfc_error ("FORALL index-name at %L must be a scalar variable "
9952 "of type integer", &fa
->var
->where
);
9956 /* Check if any outer FORALL index name is the same as the current
9958 for (i
= 0; i
< nvar
; i
++)
9960 if (fa
->var
->symtree
->n
.sym
== var_expr
[i
]->symtree
->n
.sym
)
9961 gfc_error ("An outer FORALL construct already has an index "
9962 "with this name %L", &fa
->var
->where
);
9965 /* Record the current FORALL index. */
9966 var_expr
[nvar
] = gfc_copy_expr (fa
->var
);
9970 /* No memory leak. */
9971 gcc_assert (nvar
<= total_var
);
9974 /* Resolve the FORALL body. */
9975 gfc_resolve_forall_body (code
, nvar
, var_expr
);
9977 /* May call gfc_resolve_forall to resolve the inner FORALL loop. */
9978 gfc_resolve_blocks (code
->block
, ns
);
9982 /* Free only the VAR_EXPRs allocated in this frame. */
9983 for (i
= nvar
; i
< tmp
; i
++)
9984 gfc_free_expr (var_expr
[i
]);
9988 /* We are in the outermost FORALL construct. */
9989 gcc_assert (forall_save
== 0);
9991 /* VAR_EXPR is not needed any more. */
9998 /* Resolve a BLOCK construct statement. */
10001 resolve_block_construct (gfc_code
* code
)
10003 /* Resolve the BLOCK's namespace. */
10004 gfc_resolve (code
->ext
.block
.ns
);
10006 /* For an ASSOCIATE block, the associations (and their targets) are already
10007 resolved during resolve_symbol. */
10011 /* Resolve lists of blocks found in IF, SELECT CASE, WHERE, FORALL, GOTO and
10015 gfc_resolve_blocks (gfc_code
*b
, gfc_namespace
*ns
)
10019 for (; b
; b
= b
->block
)
10021 t
= gfc_resolve_expr (b
->expr1
);
10022 if (!gfc_resolve_expr (b
->expr2
))
10028 if (t
&& b
->expr1
!= NULL
10029 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
!= 0))
10030 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
10036 && b
->expr1
!= NULL
10037 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
== 0))
10038 gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
10043 resolve_branch (b
->label1
, b
);
10047 resolve_block_construct (b
);
10051 case EXEC_SELECT_TYPE
:
10054 case EXEC_DO_WHILE
:
10055 case EXEC_DO_CONCURRENT
:
10056 case EXEC_CRITICAL
:
10059 case EXEC_IOLENGTH
:
10063 case EXEC_OMP_ATOMIC
:
10064 case EXEC_OACC_ATOMIC
:
10066 gfc_omp_atomic_op aop
10067 = (gfc_omp_atomic_op
) (b
->ext
.omp_atomic
& GFC_OMP_ATOMIC_MASK
);
10069 /* Verify this before calling gfc_resolve_code, which might
10071 gcc_assert (b
->next
&& b
->next
->op
== EXEC_ASSIGN
);
10072 gcc_assert (((aop
!= GFC_OMP_ATOMIC_CAPTURE
)
10073 && b
->next
->next
== NULL
)
10074 || ((aop
== GFC_OMP_ATOMIC_CAPTURE
)
10075 && b
->next
->next
!= NULL
10076 && b
->next
->next
->op
== EXEC_ASSIGN
10077 && b
->next
->next
->next
== NULL
));
10081 case EXEC_OACC_PARALLEL_LOOP
:
10082 case EXEC_OACC_PARALLEL
:
10083 case EXEC_OACC_KERNELS_LOOP
:
10084 case EXEC_OACC_KERNELS
:
10085 case EXEC_OACC_DATA
:
10086 case EXEC_OACC_HOST_DATA
:
10087 case EXEC_OACC_LOOP
:
10088 case EXEC_OACC_UPDATE
:
10089 case EXEC_OACC_WAIT
:
10090 case EXEC_OACC_CACHE
:
10091 case EXEC_OACC_ENTER_DATA
:
10092 case EXEC_OACC_EXIT_DATA
:
10093 case EXEC_OACC_ROUTINE
:
10094 case EXEC_OMP_CRITICAL
:
10095 case EXEC_OMP_DISTRIBUTE
:
10096 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
10097 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
10098 case EXEC_OMP_DISTRIBUTE_SIMD
:
10100 case EXEC_OMP_DO_SIMD
:
10101 case EXEC_OMP_MASTER
:
10102 case EXEC_OMP_ORDERED
:
10103 case EXEC_OMP_PARALLEL
:
10104 case EXEC_OMP_PARALLEL_DO
:
10105 case EXEC_OMP_PARALLEL_DO_SIMD
:
10106 case EXEC_OMP_PARALLEL_SECTIONS
:
10107 case EXEC_OMP_PARALLEL_WORKSHARE
:
10108 case EXEC_OMP_SECTIONS
:
10109 case EXEC_OMP_SIMD
:
10110 case EXEC_OMP_SINGLE
:
10111 case EXEC_OMP_TARGET
:
10112 case EXEC_OMP_TARGET_DATA
:
10113 case EXEC_OMP_TARGET_ENTER_DATA
:
10114 case EXEC_OMP_TARGET_EXIT_DATA
:
10115 case EXEC_OMP_TARGET_PARALLEL
:
10116 case EXEC_OMP_TARGET_PARALLEL_DO
:
10117 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
10118 case EXEC_OMP_TARGET_SIMD
:
10119 case EXEC_OMP_TARGET_TEAMS
:
10120 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
10121 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10122 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10123 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
10124 case EXEC_OMP_TARGET_UPDATE
:
10125 case EXEC_OMP_TASK
:
10126 case EXEC_OMP_TASKGROUP
:
10127 case EXEC_OMP_TASKLOOP
:
10128 case EXEC_OMP_TASKLOOP_SIMD
:
10129 case EXEC_OMP_TASKWAIT
:
10130 case EXEC_OMP_TASKYIELD
:
10131 case EXEC_OMP_TEAMS
:
10132 case EXEC_OMP_TEAMS_DISTRIBUTE
:
10133 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10134 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10135 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
10136 case EXEC_OMP_WORKSHARE
:
10140 gfc_internal_error ("gfc_resolve_blocks(): Bad block type");
10143 gfc_resolve_code (b
->next
, ns
);
10148 /* Does everything to resolve an ordinary assignment. Returns true
10149 if this is an interface assignment. */
10151 resolve_ordinary_assign (gfc_code
*code
, gfc_namespace
*ns
)
10158 symbol_attribute attr
;
10160 if (gfc_extend_assign (code
, ns
))
10164 if (code
->op
== EXEC_ASSIGN_CALL
)
10166 lhs
= code
->ext
.actual
->expr
;
10167 rhsptr
= &code
->ext
.actual
->next
->expr
;
10171 gfc_actual_arglist
* args
;
10172 gfc_typebound_proc
* tbp
;
10174 gcc_assert (code
->op
== EXEC_COMPCALL
);
10176 args
= code
->expr1
->value
.compcall
.actual
;
10178 rhsptr
= &args
->next
->expr
;
10180 tbp
= code
->expr1
->value
.compcall
.tbp
;
10181 gcc_assert (!tbp
->is_generic
);
10184 /* Make a temporary rhs when there is a default initializer
10185 and rhs is the same symbol as the lhs. */
10186 if ((*rhsptr
)->expr_type
== EXPR_VARIABLE
10187 && (*rhsptr
)->symtree
->n
.sym
->ts
.type
== BT_DERIVED
10188 && gfc_has_default_initializer ((*rhsptr
)->symtree
->n
.sym
->ts
.u
.derived
)
10189 && (lhs
->symtree
->n
.sym
== (*rhsptr
)->symtree
->n
.sym
))
10190 *rhsptr
= gfc_get_parentheses (*rhsptr
);
10199 && !gfc_notify_std (GFC_STD_GNU
, "BOZ literal at %L outside "
10200 "a DATA statement and outside INT/REAL/DBLE/CMPLX",
10204 /* Handle the case of a BOZ literal on the RHS. */
10205 if (rhs
->is_boz
&& lhs
->ts
.type
!= BT_INTEGER
)
10208 if (warn_surprising
)
10209 gfc_warning (OPT_Wsurprising
,
10210 "BOZ literal at %L is bitwise transferred "
10211 "non-integer symbol %qs", &code
->loc
,
10212 lhs
->symtree
->n
.sym
->name
);
10214 if (!gfc_convert_boz (rhs
, &lhs
->ts
))
10216 if ((rc
= gfc_range_check (rhs
)) != ARITH_OK
)
10218 if (rc
== ARITH_UNDERFLOW
)
10219 gfc_error ("Arithmetic underflow of bit-wise transferred BOZ at %L"
10220 ". This check can be disabled with the option "
10221 "%<-fno-range-check%>", &rhs
->where
);
10222 else if (rc
== ARITH_OVERFLOW
)
10223 gfc_error ("Arithmetic overflow of bit-wise transferred BOZ at %L"
10224 ". This check can be disabled with the option "
10225 "%<-fno-range-check%>", &rhs
->where
);
10226 else if (rc
== ARITH_NAN
)
10227 gfc_error ("Arithmetic NaN of bit-wise transferred BOZ at %L"
10228 ". This check can be disabled with the option "
10229 "%<-fno-range-check%>", &rhs
->where
);
10234 if (lhs
->ts
.type
== BT_CHARACTER
10235 && warn_character_truncation
)
10237 HOST_WIDE_INT llen
= 0, rlen
= 0;
10238 if (lhs
->ts
.u
.cl
!= NULL
10239 && lhs
->ts
.u
.cl
->length
!= NULL
10240 && lhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10241 llen
= gfc_mpz_get_hwi (lhs
->ts
.u
.cl
->length
->value
.integer
);
10243 if (rhs
->expr_type
== EXPR_CONSTANT
)
10244 rlen
= rhs
->value
.character
.length
;
10246 else if (rhs
->ts
.u
.cl
!= NULL
10247 && rhs
->ts
.u
.cl
->length
!= NULL
10248 && rhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10249 rlen
= gfc_mpz_get_hwi (rhs
->ts
.u
.cl
->length
->value
.integer
);
10251 if (rlen
&& llen
&& rlen
> llen
)
10252 gfc_warning_now (OPT_Wcharacter_truncation
,
10253 "CHARACTER expression will be truncated "
10254 "in assignment (%ld/%ld) at %L",
10255 (long) llen
, (long) rlen
, &code
->loc
);
10258 /* Ensure that a vector index expression for the lvalue is evaluated
10259 to a temporary if the lvalue symbol is referenced in it. */
10262 for (ref
= lhs
->ref
; ref
; ref
= ref
->next
)
10263 if (ref
->type
== REF_ARRAY
)
10265 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
10266 if (ref
->u
.ar
.dimen_type
[n
] == DIMEN_VECTOR
10267 && gfc_find_sym_in_expr (lhs
->symtree
->n
.sym
,
10268 ref
->u
.ar
.start
[n
]))
10270 = gfc_get_parentheses (ref
->u
.ar
.start
[n
]);
10274 if (gfc_pure (NULL
))
10276 if (lhs
->ts
.type
== BT_DERIVED
10277 && lhs
->expr_type
== EXPR_VARIABLE
10278 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10279 && rhs
->expr_type
== EXPR_VARIABLE
10280 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10281 || gfc_is_coindexed (rhs
)))
10283 /* F2008, C1283. */
10284 if (gfc_is_coindexed (rhs
))
10285 gfc_error ("Coindexed expression at %L is assigned to "
10286 "a derived type variable with a POINTER "
10287 "component in a PURE procedure",
10290 gfc_error ("The impure variable at %L is assigned to "
10291 "a derived type variable with a POINTER "
10292 "component in a PURE procedure (12.6)",
10297 /* Fortran 2008, C1283. */
10298 if (gfc_is_coindexed (lhs
))
10300 gfc_error ("Assignment to coindexed variable at %L in a PURE "
10301 "procedure", &rhs
->where
);
10306 if (gfc_implicit_pure (NULL
))
10308 if (lhs
->expr_type
== EXPR_VARIABLE
10309 && lhs
->symtree
->n
.sym
!= gfc_current_ns
->proc_name
10310 && lhs
->symtree
->n
.sym
->ns
!= gfc_current_ns
)
10311 gfc_unset_implicit_pure (NULL
);
10313 if (lhs
->ts
.type
== BT_DERIVED
10314 && lhs
->expr_type
== EXPR_VARIABLE
10315 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10316 && rhs
->expr_type
== EXPR_VARIABLE
10317 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10318 || gfc_is_coindexed (rhs
)))
10319 gfc_unset_implicit_pure (NULL
);
10321 /* Fortran 2008, C1283. */
10322 if (gfc_is_coindexed (lhs
))
10323 gfc_unset_implicit_pure (NULL
);
10326 /* F2008, 7.2.1.2. */
10327 attr
= gfc_expr_attr (lhs
);
10328 if (lhs
->ts
.type
== BT_CLASS
&& attr
.allocatable
)
10330 if (attr
.codimension
)
10332 gfc_error ("Assignment to polymorphic coarray at %L is not "
10333 "permitted", &lhs
->where
);
10336 if (!gfc_notify_std (GFC_STD_F2008
, "Assignment to an allocatable "
10337 "polymorphic variable at %L", &lhs
->where
))
10339 if (!flag_realloc_lhs
)
10341 gfc_error ("Assignment to an allocatable polymorphic variable at %L "
10342 "requires %<-frealloc-lhs%>", &lhs
->where
);
10346 else if (lhs
->ts
.type
== BT_CLASS
)
10348 gfc_error ("Nonallocatable variable must not be polymorphic in intrinsic "
10349 "assignment at %L - check that there is a matching specific "
10350 "subroutine for '=' operator", &lhs
->where
);
10354 bool lhs_coindexed
= gfc_is_coindexed (lhs
);
10356 /* F2008, Section 7.2.1.2. */
10357 if (lhs_coindexed
&& gfc_has_ultimate_allocatable (lhs
))
10359 gfc_error ("Coindexed variable must not have an allocatable ultimate "
10360 "component in assignment at %L", &lhs
->where
);
10364 /* Assign the 'data' of a class object to a derived type. */
10365 if (lhs
->ts
.type
== BT_DERIVED
10366 && rhs
->ts
.type
== BT_CLASS
10367 && rhs
->expr_type
!= EXPR_ARRAY
)
10368 gfc_add_data_component (rhs
);
10370 bool caf_convert_to_send
= flag_coarray
== GFC_FCOARRAY_LIB
10372 || (code
->expr2
->expr_type
== EXPR_FUNCTION
10373 && code
->expr2
->value
.function
.isym
10374 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
10375 && (code
->expr1
->rank
== 0 || code
->expr2
->rank
!= 0)
10376 && !gfc_expr_attr (rhs
).allocatable
10377 && !gfc_has_vector_subscript (rhs
)));
10379 gfc_check_assign (lhs
, rhs
, 1, !caf_convert_to_send
);
10381 /* Insert a GFC_ISYM_CAF_SEND intrinsic, when the LHS is a coindexed variable.
10382 Additionally, insert this code when the RHS is a CAF as we then use the
10383 GFC_ISYM_CAF_SEND intrinsic just to avoid a temporary; but do not do so if
10384 the LHS is (re)allocatable or has a vector subscript. If the LHS is a
10385 noncoindexed array and the RHS is a coindexed scalar, use the normal code
10387 if (caf_convert_to_send
)
10389 if (code
->expr2
->expr_type
== EXPR_FUNCTION
10390 && code
->expr2
->value
.function
.isym
10391 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
10392 remove_caf_get_intrinsic (code
->expr2
);
10393 code
->op
= EXEC_CALL
;
10394 gfc_get_sym_tree (GFC_PREFIX ("caf_send"), ns
, &code
->symtree
, true);
10395 code
->resolved_sym
= code
->symtree
->n
.sym
;
10396 code
->resolved_sym
->attr
.flavor
= FL_PROCEDURE
;
10397 code
->resolved_sym
->attr
.intrinsic
= 1;
10398 code
->resolved_sym
->attr
.subroutine
= 1;
10399 code
->resolved_isym
= gfc_intrinsic_subroutine_by_id (GFC_ISYM_CAF_SEND
);
10400 gfc_commit_symbol (code
->resolved_sym
);
10401 code
->ext
.actual
= gfc_get_actual_arglist ();
10402 code
->ext
.actual
->expr
= lhs
;
10403 code
->ext
.actual
->next
= gfc_get_actual_arglist ();
10404 code
->ext
.actual
->next
->expr
= rhs
;
10405 code
->expr1
= NULL
;
10406 code
->expr2
= NULL
;
10413 /* Add a component reference onto an expression. */
10416 add_comp_ref (gfc_expr
*e
, gfc_component
*c
)
10421 ref
= &((*ref
)->next
);
10422 *ref
= gfc_get_ref ();
10423 (*ref
)->type
= REF_COMPONENT
;
10424 (*ref
)->u
.c
.sym
= e
->ts
.u
.derived
;
10425 (*ref
)->u
.c
.component
= c
;
10428 /* Add a full array ref, as necessary. */
10431 gfc_add_full_array_ref (e
, c
->as
);
10432 e
->rank
= c
->as
->rank
;
10437 /* Build an assignment. Keep the argument 'op' for future use, so that
10438 pointer assignments can be made. */
10441 build_assignment (gfc_exec_op op
, gfc_expr
*expr1
, gfc_expr
*expr2
,
10442 gfc_component
*comp1
, gfc_component
*comp2
, locus loc
)
10444 gfc_code
*this_code
;
10446 this_code
= gfc_get_code (op
);
10447 this_code
->next
= NULL
;
10448 this_code
->expr1
= gfc_copy_expr (expr1
);
10449 this_code
->expr2
= gfc_copy_expr (expr2
);
10450 this_code
->loc
= loc
;
10451 if (comp1
&& comp2
)
10453 add_comp_ref (this_code
->expr1
, comp1
);
10454 add_comp_ref (this_code
->expr2
, comp2
);
10461 /* Makes a temporary variable expression based on the characteristics of
10462 a given variable expression. */
10465 get_temp_from_expr (gfc_expr
*e
, gfc_namespace
*ns
)
10467 static int serial
= 0;
10468 char name
[GFC_MAX_SYMBOL_LEN
];
10470 gfc_array_spec
*as
;
10471 gfc_array_ref
*aref
;
10474 sprintf (name
, GFC_PREFIX("DA%d"), serial
++);
10475 gfc_get_sym_tree (name
, ns
, &tmp
, false);
10476 gfc_add_type (tmp
->n
.sym
, &e
->ts
, NULL
);
10482 /* Obtain the arrayspec for the temporary. */
10483 if (e
->rank
&& e
->expr_type
!= EXPR_ARRAY
10484 && e
->expr_type
!= EXPR_FUNCTION
10485 && e
->expr_type
!= EXPR_OP
)
10487 aref
= gfc_find_array_ref (e
);
10488 if (e
->expr_type
== EXPR_VARIABLE
10489 && e
->symtree
->n
.sym
->as
== aref
->as
)
10493 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
10494 if (ref
->type
== REF_COMPONENT
10495 && ref
->u
.c
.component
->as
== aref
->as
)
10503 /* Add the attributes and the arrayspec to the temporary. */
10504 tmp
->n
.sym
->attr
= gfc_expr_attr (e
);
10505 tmp
->n
.sym
->attr
.function
= 0;
10506 tmp
->n
.sym
->attr
.result
= 0;
10507 tmp
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
10508 tmp
->n
.sym
->attr
.dummy
= 0;
10509 tmp
->n
.sym
->attr
.intent
= INTENT_UNKNOWN
;
10513 tmp
->n
.sym
->as
= gfc_copy_array_spec (as
);
10516 if (as
->type
== AS_DEFERRED
)
10517 tmp
->n
.sym
->attr
.allocatable
= 1;
10519 else if (e
->rank
&& (e
->expr_type
== EXPR_ARRAY
10520 || e
->expr_type
== EXPR_FUNCTION
10521 || e
->expr_type
== EXPR_OP
))
10523 tmp
->n
.sym
->as
= gfc_get_array_spec ();
10524 tmp
->n
.sym
->as
->type
= AS_DEFERRED
;
10525 tmp
->n
.sym
->as
->rank
= e
->rank
;
10526 tmp
->n
.sym
->attr
.allocatable
= 1;
10527 tmp
->n
.sym
->attr
.dimension
= 1;
10530 tmp
->n
.sym
->attr
.dimension
= 0;
10532 gfc_set_sym_referenced (tmp
->n
.sym
);
10533 gfc_commit_symbol (tmp
->n
.sym
);
10534 e
= gfc_lval_expr_from_sym (tmp
->n
.sym
);
10536 /* Should the lhs be a section, use its array ref for the
10537 temporary expression. */
10538 if (aref
&& aref
->type
!= AR_FULL
)
10540 gfc_free_ref_list (e
->ref
);
10541 e
->ref
= gfc_copy_ref (ref
);
10547 /* Add one line of code to the code chain, making sure that 'head' and
10548 'tail' are appropriately updated. */
10551 add_code_to_chain (gfc_code
**this_code
, gfc_code
**head
, gfc_code
**tail
)
10553 gcc_assert (this_code
);
10555 *head
= *tail
= *this_code
;
10557 *tail
= gfc_append_code (*tail
, *this_code
);
10562 /* Counts the potential number of part array references that would
10563 result from resolution of typebound defined assignments. */
10566 nonscalar_typebound_assign (gfc_symbol
*derived
, int depth
)
10569 int c_depth
= 0, t_depth
;
10571 for (c
= derived
->components
; c
; c
= c
->next
)
10573 if ((!gfc_bt_struct (c
->ts
.type
)
10575 || c
->attr
.allocatable
10576 || c
->attr
.proc_pointer_comp
10577 || c
->attr
.class_pointer
10578 || c
->attr
.proc_pointer
)
10579 && !c
->attr
.defined_assign_comp
)
10582 if (c
->as
&& c_depth
== 0)
10585 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
10586 t_depth
= nonscalar_typebound_assign (c
->ts
.u
.derived
,
10591 c_depth
= t_depth
> c_depth
? t_depth
: c_depth
;
10593 return depth
+ c_depth
;
10597 /* Implement 7.2.1.3 of the F08 standard:
10598 "An intrinsic assignment where the variable is of derived type is
10599 performed as if each component of the variable were assigned from the
10600 corresponding component of expr using pointer assignment (7.2.2) for
10601 each pointer component, defined assignment for each nonpointer
10602 nonallocatable component of a type that has a type-bound defined
10603 assignment consistent with the component, intrinsic assignment for
10604 each other nonpointer nonallocatable component, ..."
10606 The pointer assignments are taken care of by the intrinsic
10607 assignment of the structure itself. This function recursively adds
10608 defined assignments where required. The recursion is accomplished
10609 by calling gfc_resolve_code.
10611 When the lhs in a defined assignment has intent INOUT, we need a
10612 temporary for the lhs. In pseudo-code:
10614 ! Only call function lhs once.
10615 if (lhs is not a constant or an variable)
10618 ! Do the intrinsic assignment
10620 ! Now do the defined assignments
10621 do over components with typebound defined assignment [%cmp]
10622 #if one component's assignment procedure is INOUT
10624 #if expr2 non-variable
10630 t1%cmp {defined=} expr2%cmp
10636 expr1%cmp {defined=} expr2%cmp
10640 /* The temporary assignments have to be put on top of the additional
10641 code to avoid the result being changed by the intrinsic assignment.
10643 static int component_assignment_level
= 0;
10644 static gfc_code
*tmp_head
= NULL
, *tmp_tail
= NULL
;
10647 generate_component_assignments (gfc_code
**code
, gfc_namespace
*ns
)
10649 gfc_component
*comp1
, *comp2
;
10650 gfc_code
*this_code
= NULL
, *head
= NULL
, *tail
= NULL
;
10652 int error_count
, depth
;
10654 gfc_get_errors (NULL
, &error_count
);
10656 /* Filter out continuing processing after an error. */
10658 || (*code
)->expr1
->ts
.type
!= BT_DERIVED
10659 || (*code
)->expr2
->ts
.type
!= BT_DERIVED
)
10662 /* TODO: Handle more than one part array reference in assignments. */
10663 depth
= nonscalar_typebound_assign ((*code
)->expr1
->ts
.u
.derived
,
10664 (*code
)->expr1
->rank
? 1 : 0);
10667 gfc_warning (0, "TODO: type-bound defined assignment(s) at %L not "
10668 "done because multiple part array references would "
10669 "occur in intermediate expressions.", &(*code
)->loc
);
10673 component_assignment_level
++;
10675 /* Create a temporary so that functions get called only once. */
10676 if ((*code
)->expr2
->expr_type
!= EXPR_VARIABLE
10677 && (*code
)->expr2
->expr_type
!= EXPR_CONSTANT
)
10679 gfc_expr
*tmp_expr
;
10681 /* Assign the rhs to the temporary. */
10682 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
10683 this_code
= build_assignment (EXEC_ASSIGN
,
10684 tmp_expr
, (*code
)->expr2
,
10685 NULL
, NULL
, (*code
)->loc
);
10686 /* Add the code and substitute the rhs expression. */
10687 add_code_to_chain (&this_code
, &tmp_head
, &tmp_tail
);
10688 gfc_free_expr ((*code
)->expr2
);
10689 (*code
)->expr2
= tmp_expr
;
10692 /* Do the intrinsic assignment. This is not needed if the lhs is one
10693 of the temporaries generated here, since the intrinsic assignment
10694 to the final result already does this. */
10695 if ((*code
)->expr1
->symtree
->n
.sym
->name
[2] != '@')
10697 this_code
= build_assignment (EXEC_ASSIGN
,
10698 (*code
)->expr1
, (*code
)->expr2
,
10699 NULL
, NULL
, (*code
)->loc
);
10700 add_code_to_chain (&this_code
, &head
, &tail
);
10703 comp1
= (*code
)->expr1
->ts
.u
.derived
->components
;
10704 comp2
= (*code
)->expr2
->ts
.u
.derived
->components
;
10707 for (; comp1
; comp1
= comp1
->next
, comp2
= comp2
->next
)
10709 bool inout
= false;
10711 /* The intrinsic assignment does the right thing for pointers
10712 of all kinds and allocatable components. */
10713 if (!gfc_bt_struct (comp1
->ts
.type
)
10714 || comp1
->attr
.pointer
10715 || comp1
->attr
.allocatable
10716 || comp1
->attr
.proc_pointer_comp
10717 || comp1
->attr
.class_pointer
10718 || comp1
->attr
.proc_pointer
)
10721 /* Make an assigment for this component. */
10722 this_code
= build_assignment (EXEC_ASSIGN
,
10723 (*code
)->expr1
, (*code
)->expr2
,
10724 comp1
, comp2
, (*code
)->loc
);
10726 /* Convert the assignment if there is a defined assignment for
10727 this type. Otherwise, using the call from gfc_resolve_code,
10728 recurse into its components. */
10729 gfc_resolve_code (this_code
, ns
);
10731 if (this_code
->op
== EXEC_ASSIGN_CALL
)
10733 gfc_formal_arglist
*dummy_args
;
10735 /* Check that there is a typebound defined assignment. If not,
10736 then this must be a module defined assignment. We cannot
10737 use the defined_assign_comp attribute here because it must
10738 be this derived type that has the defined assignment and not
10740 if (!(comp1
->ts
.u
.derived
->f2k_derived
10741 && comp1
->ts
.u
.derived
->f2k_derived
10742 ->tb_op
[INTRINSIC_ASSIGN
]))
10744 gfc_free_statements (this_code
);
10749 /* If the first argument of the subroutine has intent INOUT
10750 a temporary must be generated and used instead. */
10751 rsym
= this_code
->resolved_sym
;
10752 dummy_args
= gfc_sym_get_dummy_args (rsym
);
10754 && dummy_args
->sym
->attr
.intent
== INTENT_INOUT
)
10756 gfc_code
*temp_code
;
10759 /* Build the temporary required for the assignment and put
10760 it at the head of the generated code. */
10763 t1
= get_temp_from_expr ((*code
)->expr1
, ns
);
10764 temp_code
= build_assignment (EXEC_ASSIGN
,
10765 t1
, (*code
)->expr1
,
10766 NULL
, NULL
, (*code
)->loc
);
10768 /* For allocatable LHS, check whether it is allocated. Note
10769 that allocatable components with defined assignment are
10770 not yet support. See PR 57696. */
10771 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
)
10775 gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
10776 block
= gfc_get_code (EXEC_IF
);
10777 block
->block
= gfc_get_code (EXEC_IF
);
10778 block
->block
->expr1
10779 = gfc_build_intrinsic_call (ns
,
10780 GFC_ISYM_ALLOCATED
, "allocated",
10781 (*code
)->loc
, 1, e
);
10782 block
->block
->next
= temp_code
;
10785 add_code_to_chain (&temp_code
, &tmp_head
, &tmp_tail
);
10788 /* Replace the first actual arg with the component of the
10790 gfc_free_expr (this_code
->ext
.actual
->expr
);
10791 this_code
->ext
.actual
->expr
= gfc_copy_expr (t1
);
10792 add_comp_ref (this_code
->ext
.actual
->expr
, comp1
);
10794 /* If the LHS variable is allocatable and wasn't allocated and
10795 the temporary is allocatable, pointer assign the address of
10796 the freshly allocated LHS to the temporary. */
10797 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
10798 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
10803 cond
= gfc_get_expr ();
10804 cond
->ts
.type
= BT_LOGICAL
;
10805 cond
->ts
.kind
= gfc_default_logical_kind
;
10806 cond
->expr_type
= EXPR_OP
;
10807 cond
->where
= (*code
)->loc
;
10808 cond
->value
.op
.op
= INTRINSIC_NOT
;
10809 cond
->value
.op
.op1
= gfc_build_intrinsic_call (ns
,
10810 GFC_ISYM_ALLOCATED
, "allocated",
10811 (*code
)->loc
, 1, gfc_copy_expr (t1
));
10812 block
= gfc_get_code (EXEC_IF
);
10813 block
->block
= gfc_get_code (EXEC_IF
);
10814 block
->block
->expr1
= cond
;
10815 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
10816 t1
, (*code
)->expr1
,
10817 NULL
, NULL
, (*code
)->loc
);
10818 add_code_to_chain (&block
, &head
, &tail
);
10822 else if (this_code
->op
== EXEC_ASSIGN
&& !this_code
->next
)
10824 /* Don't add intrinsic assignments since they are already
10825 effected by the intrinsic assignment of the structure. */
10826 gfc_free_statements (this_code
);
10831 add_code_to_chain (&this_code
, &head
, &tail
);
10835 /* Transfer the value to the final result. */
10836 this_code
= build_assignment (EXEC_ASSIGN
,
10837 (*code
)->expr1
, t1
,
10838 comp1
, comp2
, (*code
)->loc
);
10839 add_code_to_chain (&this_code
, &head
, &tail
);
10843 /* Put the temporary assignments at the top of the generated code. */
10844 if (tmp_head
&& component_assignment_level
== 1)
10846 gfc_append_code (tmp_head
, head
);
10848 tmp_head
= tmp_tail
= NULL
;
10851 // If we did a pointer assignment - thus, we need to ensure that the LHS is
10852 // not accidentally deallocated. Hence, nullify t1.
10853 if (t1
&& (*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
10854 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
10860 e
= gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
10861 cond
= gfc_build_intrinsic_call (ns
, GFC_ISYM_ASSOCIATED
, "associated",
10862 (*code
)->loc
, 2, gfc_copy_expr (t1
), e
);
10863 block
= gfc_get_code (EXEC_IF
);
10864 block
->block
= gfc_get_code (EXEC_IF
);
10865 block
->block
->expr1
= cond
;
10866 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
10867 t1
, gfc_get_null_expr (&(*code
)->loc
),
10868 NULL
, NULL
, (*code
)->loc
);
10869 gfc_append_code (tail
, block
);
10873 /* Now attach the remaining code chain to the input code. Step on
10874 to the end of the new code since resolution is complete. */
10875 gcc_assert ((*code
)->op
== EXEC_ASSIGN
);
10876 tail
->next
= (*code
)->next
;
10877 /* Overwrite 'code' because this would place the intrinsic assignment
10878 before the temporary for the lhs is created. */
10879 gfc_free_expr ((*code
)->expr1
);
10880 gfc_free_expr ((*code
)->expr2
);
10886 component_assignment_level
--;
10890 /* F2008: Pointer function assignments are of the form:
10891 ptr_fcn (args) = expr
10892 This function breaks these assignments into two statements:
10893 temporary_pointer => ptr_fcn(args)
10894 temporary_pointer = expr */
10897 resolve_ptr_fcn_assign (gfc_code
**code
, gfc_namespace
*ns
)
10899 gfc_expr
*tmp_ptr_expr
;
10900 gfc_code
*this_code
;
10901 gfc_component
*comp
;
10904 if ((*code
)->expr1
->expr_type
!= EXPR_FUNCTION
)
10907 /* Even if standard does not support this feature, continue to build
10908 the two statements to avoid upsetting frontend_passes.c. */
10909 gfc_notify_std (GFC_STD_F2008
, "Pointer procedure assignment at "
10910 "%L", &(*code
)->loc
);
10912 comp
= gfc_get_proc_ptr_comp ((*code
)->expr1
);
10915 s
= comp
->ts
.interface
;
10917 s
= (*code
)->expr1
->symtree
->n
.sym
;
10919 if (s
== NULL
|| !s
->result
->attr
.pointer
)
10921 gfc_error ("The function result on the lhs of the assignment at "
10922 "%L must have the pointer attribute.",
10923 &(*code
)->expr1
->where
);
10924 (*code
)->op
= EXEC_NOP
;
10928 tmp_ptr_expr
= get_temp_from_expr ((*code
)->expr2
, ns
);
10930 /* get_temp_from_expression is set up for ordinary assignments. To that
10931 end, where array bounds are not known, arrays are made allocatable.
10932 Change the temporary to a pointer here. */
10933 tmp_ptr_expr
->symtree
->n
.sym
->attr
.pointer
= 1;
10934 tmp_ptr_expr
->symtree
->n
.sym
->attr
.allocatable
= 0;
10935 tmp_ptr_expr
->where
= (*code
)->loc
;
10937 this_code
= build_assignment (EXEC_ASSIGN
,
10938 tmp_ptr_expr
, (*code
)->expr2
,
10939 NULL
, NULL
, (*code
)->loc
);
10940 this_code
->next
= (*code
)->next
;
10941 (*code
)->next
= this_code
;
10942 (*code
)->op
= EXEC_POINTER_ASSIGN
;
10943 (*code
)->expr2
= (*code
)->expr1
;
10944 (*code
)->expr1
= tmp_ptr_expr
;
10950 /* Deferred character length assignments from an operator expression
10951 require a temporary because the character length of the lhs can
10952 change in the course of the assignment. */
10955 deferred_op_assign (gfc_code
**code
, gfc_namespace
*ns
)
10957 gfc_expr
*tmp_expr
;
10958 gfc_code
*this_code
;
10960 if (!((*code
)->expr1
->ts
.type
== BT_CHARACTER
10961 && (*code
)->expr1
->ts
.deferred
&& (*code
)->expr1
->rank
10962 && (*code
)->expr2
->expr_type
== EXPR_OP
))
10965 if (!gfc_check_dependency ((*code
)->expr1
, (*code
)->expr2
, 1))
10968 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
10969 tmp_expr
->where
= (*code
)->loc
;
10971 /* A new charlen is required to ensure that the variable string
10972 length is different to that of the original lhs. */
10973 tmp_expr
->ts
.u
.cl
= gfc_get_charlen();
10974 tmp_expr
->symtree
->n
.sym
->ts
.u
.cl
= tmp_expr
->ts
.u
.cl
;
10975 tmp_expr
->ts
.u
.cl
->next
= (*code
)->expr2
->ts
.u
.cl
->next
;
10976 (*code
)->expr2
->ts
.u
.cl
->next
= tmp_expr
->ts
.u
.cl
;
10978 tmp_expr
->symtree
->n
.sym
->ts
.deferred
= 1;
10980 this_code
= build_assignment (EXEC_ASSIGN
,
10982 gfc_copy_expr (tmp_expr
),
10983 NULL
, NULL
, (*code
)->loc
);
10985 (*code
)->expr1
= tmp_expr
;
10987 this_code
->next
= (*code
)->next
;
10988 (*code
)->next
= this_code
;
10994 /* Given a block of code, recursively resolve everything pointed to by this
10998 gfc_resolve_code (gfc_code
*code
, gfc_namespace
*ns
)
11000 int omp_workshare_save
;
11001 int forall_save
, do_concurrent_save
;
11005 frame
.prev
= cs_base
;
11009 find_reachable_labels (code
);
11011 for (; code
; code
= code
->next
)
11013 frame
.current
= code
;
11014 forall_save
= forall_flag
;
11015 do_concurrent_save
= gfc_do_concurrent_flag
;
11017 if (code
->op
== EXEC_FORALL
)
11020 gfc_resolve_forall (code
, ns
, forall_save
);
11023 else if (code
->block
)
11025 omp_workshare_save
= -1;
11028 case EXEC_OACC_PARALLEL_LOOP
:
11029 case EXEC_OACC_PARALLEL
:
11030 case EXEC_OACC_KERNELS_LOOP
:
11031 case EXEC_OACC_KERNELS
:
11032 case EXEC_OACC_DATA
:
11033 case EXEC_OACC_HOST_DATA
:
11034 case EXEC_OACC_LOOP
:
11035 gfc_resolve_oacc_blocks (code
, ns
);
11037 case EXEC_OMP_PARALLEL_WORKSHARE
:
11038 omp_workshare_save
= omp_workshare_flag
;
11039 omp_workshare_flag
= 1;
11040 gfc_resolve_omp_parallel_blocks (code
, ns
);
11042 case EXEC_OMP_PARALLEL
:
11043 case EXEC_OMP_PARALLEL_DO
:
11044 case EXEC_OMP_PARALLEL_DO_SIMD
:
11045 case EXEC_OMP_PARALLEL_SECTIONS
:
11046 case EXEC_OMP_TARGET_PARALLEL
:
11047 case EXEC_OMP_TARGET_PARALLEL_DO
:
11048 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11049 case EXEC_OMP_TARGET_TEAMS
:
11050 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11051 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11052 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11053 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11054 case EXEC_OMP_TASK
:
11055 case EXEC_OMP_TASKLOOP
:
11056 case EXEC_OMP_TASKLOOP_SIMD
:
11057 case EXEC_OMP_TEAMS
:
11058 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11059 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11060 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11061 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11062 omp_workshare_save
= omp_workshare_flag
;
11063 omp_workshare_flag
= 0;
11064 gfc_resolve_omp_parallel_blocks (code
, ns
);
11066 case EXEC_OMP_DISTRIBUTE
:
11067 case EXEC_OMP_DISTRIBUTE_SIMD
:
11069 case EXEC_OMP_DO_SIMD
:
11070 case EXEC_OMP_SIMD
:
11071 case EXEC_OMP_TARGET_SIMD
:
11072 gfc_resolve_omp_do_blocks (code
, ns
);
11074 case EXEC_SELECT_TYPE
:
11075 /* Blocks are handled in resolve_select_type because we have
11076 to transform the SELECT TYPE into ASSOCIATE first. */
11078 case EXEC_DO_CONCURRENT
:
11079 gfc_do_concurrent_flag
= 1;
11080 gfc_resolve_blocks (code
->block
, ns
);
11081 gfc_do_concurrent_flag
= 2;
11083 case EXEC_OMP_WORKSHARE
:
11084 omp_workshare_save
= omp_workshare_flag
;
11085 omp_workshare_flag
= 1;
11088 gfc_resolve_blocks (code
->block
, ns
);
11092 if (omp_workshare_save
!= -1)
11093 omp_workshare_flag
= omp_workshare_save
;
11097 if (code
->op
!= EXEC_COMPCALL
&& code
->op
!= EXEC_CALL_PPC
)
11098 t
= gfc_resolve_expr (code
->expr1
);
11099 forall_flag
= forall_save
;
11100 gfc_do_concurrent_flag
= do_concurrent_save
;
11102 if (!gfc_resolve_expr (code
->expr2
))
11105 if (code
->op
== EXEC_ALLOCATE
11106 && !gfc_resolve_expr (code
->expr3
))
11112 case EXEC_END_BLOCK
:
11113 case EXEC_END_NESTED_BLOCK
:
11117 case EXEC_ERROR_STOP
:
11119 case EXEC_CONTINUE
:
11121 case EXEC_ASSIGN_CALL
:
11124 case EXEC_CRITICAL
:
11125 resolve_critical (code
);
11128 case EXEC_SYNC_ALL
:
11129 case EXEC_SYNC_IMAGES
:
11130 case EXEC_SYNC_MEMORY
:
11131 resolve_sync (code
);
11136 case EXEC_EVENT_POST
:
11137 case EXEC_EVENT_WAIT
:
11138 resolve_lock_unlock_event (code
);
11141 case EXEC_FAIL_IMAGE
:
11142 case EXEC_FORM_TEAM
:
11143 case EXEC_CHANGE_TEAM
:
11144 case EXEC_END_TEAM
:
11145 case EXEC_SYNC_TEAM
:
11149 /* Keep track of which entry we are up to. */
11150 current_entry_id
= code
->ext
.entry
->id
;
11154 resolve_where (code
, NULL
);
11158 if (code
->expr1
!= NULL
)
11160 if (code
->expr1
->ts
.type
!= BT_INTEGER
)
11161 gfc_error ("ASSIGNED GOTO statement at %L requires an "
11162 "INTEGER variable", &code
->expr1
->where
);
11163 else if (code
->expr1
->symtree
->n
.sym
->attr
.assign
!= 1)
11164 gfc_error ("Variable %qs has not been assigned a target "
11165 "label at %L", code
->expr1
->symtree
->n
.sym
->name
,
11166 &code
->expr1
->where
);
11169 resolve_branch (code
->label1
, code
);
11173 if (code
->expr1
!= NULL
11174 && (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
))
11175 gfc_error ("Alternate RETURN statement at %L requires a SCALAR-"
11176 "INTEGER return specifier", &code
->expr1
->where
);
11179 case EXEC_INIT_ASSIGN
:
11180 case EXEC_END_PROCEDURE
:
11187 /* Remove a GFC_ISYM_CAF_GET inserted for a coindexed variable on
11189 if (code
->expr1
->expr_type
== EXPR_FUNCTION
11190 && code
->expr1
->value
.function
.isym
11191 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
11192 remove_caf_get_intrinsic (code
->expr1
);
11194 /* If this is a pointer function in an lvalue variable context,
11195 the new code will have to be resolved afresh. This is also the
11196 case with an error, where the code is transformed into NOP to
11197 prevent ICEs downstream. */
11198 if (resolve_ptr_fcn_assign (&code
, ns
)
11199 || code
->op
== EXEC_NOP
)
11202 if (!gfc_check_vardef_context (code
->expr1
, false, false, false,
11206 if (resolve_ordinary_assign (code
, ns
))
11208 if (code
->op
== EXEC_COMPCALL
)
11214 /* Check for dependencies in deferred character length array
11215 assignments and generate a temporary, if necessary. */
11216 if (code
->op
== EXEC_ASSIGN
&& deferred_op_assign (&code
, ns
))
11219 /* F03 7.4.1.3 for non-allocatable, non-pointer components. */
11220 if (code
->op
!= EXEC_CALL
&& code
->expr1
->ts
.type
== BT_DERIVED
11221 && code
->expr1
->ts
.u
.derived
11222 && code
->expr1
->ts
.u
.derived
->attr
.defined_assign_comp
)
11223 generate_component_assignments (&code
, ns
);
11227 case EXEC_LABEL_ASSIGN
:
11228 if (code
->label1
->defined
== ST_LABEL_UNKNOWN
)
11229 gfc_error ("Label %d referenced at %L is never defined",
11230 code
->label1
->value
, &code
->label1
->where
);
11232 && (code
->expr1
->expr_type
!= EXPR_VARIABLE
11233 || code
->expr1
->symtree
->n
.sym
->ts
.type
!= BT_INTEGER
11234 || code
->expr1
->symtree
->n
.sym
->ts
.kind
11235 != gfc_default_integer_kind
11236 || code
->expr1
->symtree
->n
.sym
->as
!= NULL
))
11237 gfc_error ("ASSIGN statement at %L requires a scalar "
11238 "default INTEGER variable", &code
->expr1
->where
);
11241 case EXEC_POINTER_ASSIGN
:
11248 /* This is both a variable definition and pointer assignment
11249 context, so check both of them. For rank remapping, a final
11250 array ref may be present on the LHS and fool gfc_expr_attr
11251 used in gfc_check_vardef_context. Remove it. */
11252 e
= remove_last_array_ref (code
->expr1
);
11253 t
= gfc_check_vardef_context (e
, true, false, false,
11254 _("pointer assignment"));
11256 t
= gfc_check_vardef_context (e
, false, false, false,
11257 _("pointer assignment"));
11262 gfc_check_pointer_assign (code
->expr1
, code
->expr2
);
11264 /* Assigning a class object always is a regular assign. */
11265 if (code
->expr2
->ts
.type
== BT_CLASS
11266 && code
->expr1
->ts
.type
== BT_CLASS
11267 && !CLASS_DATA (code
->expr2
)->attr
.dimension
11268 && !(gfc_expr_attr (code
->expr1
).proc_pointer
11269 && code
->expr2
->expr_type
== EXPR_VARIABLE
11270 && code
->expr2
->symtree
->n
.sym
->attr
.flavor
11272 code
->op
= EXEC_ASSIGN
;
11276 case EXEC_ARITHMETIC_IF
:
11278 gfc_expr
*e
= code
->expr1
;
11280 gfc_resolve_expr (e
);
11281 if (e
->expr_type
== EXPR_NULL
)
11282 gfc_error ("Invalid NULL at %L", &e
->where
);
11284 if (t
&& (e
->rank
> 0
11285 || !(e
->ts
.type
== BT_REAL
|| e
->ts
.type
== BT_INTEGER
)))
11286 gfc_error ("Arithmetic IF statement at %L requires a scalar "
11287 "REAL or INTEGER expression", &e
->where
);
11289 resolve_branch (code
->label1
, code
);
11290 resolve_branch (code
->label2
, code
);
11291 resolve_branch (code
->label3
, code
);
11296 if (t
&& code
->expr1
!= NULL
11297 && (code
->expr1
->ts
.type
!= BT_LOGICAL
11298 || code
->expr1
->rank
!= 0))
11299 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
11300 &code
->expr1
->where
);
11305 resolve_call (code
);
11308 case EXEC_COMPCALL
:
11310 resolve_typebound_subroutine (code
);
11313 case EXEC_CALL_PPC
:
11314 resolve_ppc_call (code
);
11318 /* Select is complicated. Also, a SELECT construct could be
11319 a transformed computed GOTO. */
11320 resolve_select (code
, false);
11323 case EXEC_SELECT_TYPE
:
11324 resolve_select_type (code
, ns
);
11328 resolve_block_construct (code
);
11332 if (code
->ext
.iterator
!= NULL
)
11334 gfc_iterator
*iter
= code
->ext
.iterator
;
11335 if (gfc_resolve_iterator (iter
, true, false))
11336 gfc_resolve_do_iterator (code
, iter
->var
->symtree
->n
.sym
,
11341 case EXEC_DO_WHILE
:
11342 if (code
->expr1
== NULL
)
11343 gfc_internal_error ("gfc_resolve_code(): No expression on "
11346 && (code
->expr1
->rank
!= 0
11347 || code
->expr1
->ts
.type
!= BT_LOGICAL
))
11348 gfc_error ("Exit condition of DO WHILE loop at %L must be "
11349 "a scalar LOGICAL expression", &code
->expr1
->where
);
11352 case EXEC_ALLOCATE
:
11354 resolve_allocate_deallocate (code
, "ALLOCATE");
11358 case EXEC_DEALLOCATE
:
11360 resolve_allocate_deallocate (code
, "DEALLOCATE");
11365 if (!gfc_resolve_open (code
->ext
.open
))
11368 resolve_branch (code
->ext
.open
->err
, code
);
11372 if (!gfc_resolve_close (code
->ext
.close
))
11375 resolve_branch (code
->ext
.close
->err
, code
);
11378 case EXEC_BACKSPACE
:
11382 if (!gfc_resolve_filepos (code
->ext
.filepos
))
11385 resolve_branch (code
->ext
.filepos
->err
, code
);
11389 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11392 resolve_branch (code
->ext
.inquire
->err
, code
);
11395 case EXEC_IOLENGTH
:
11396 gcc_assert (code
->ext
.inquire
!= NULL
);
11397 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11400 resolve_branch (code
->ext
.inquire
->err
, code
);
11404 if (!gfc_resolve_wait (code
->ext
.wait
))
11407 resolve_branch (code
->ext
.wait
->err
, code
);
11408 resolve_branch (code
->ext
.wait
->end
, code
);
11409 resolve_branch (code
->ext
.wait
->eor
, code
);
11414 if (!gfc_resolve_dt (code
->ext
.dt
, &code
->loc
))
11417 resolve_branch (code
->ext
.dt
->err
, code
);
11418 resolve_branch (code
->ext
.dt
->end
, code
);
11419 resolve_branch (code
->ext
.dt
->eor
, code
);
11422 case EXEC_TRANSFER
:
11423 resolve_transfer (code
);
11426 case EXEC_DO_CONCURRENT
:
11428 resolve_forall_iterators (code
->ext
.forall_iterator
);
11430 if (code
->expr1
!= NULL
11431 && (code
->expr1
->ts
.type
!= BT_LOGICAL
|| code
->expr1
->rank
))
11432 gfc_error ("FORALL mask clause at %L requires a scalar LOGICAL "
11433 "expression", &code
->expr1
->where
);
11436 case EXEC_OACC_PARALLEL_LOOP
:
11437 case EXEC_OACC_PARALLEL
:
11438 case EXEC_OACC_KERNELS_LOOP
:
11439 case EXEC_OACC_KERNELS
:
11440 case EXEC_OACC_DATA
:
11441 case EXEC_OACC_HOST_DATA
:
11442 case EXEC_OACC_LOOP
:
11443 case EXEC_OACC_UPDATE
:
11444 case EXEC_OACC_WAIT
:
11445 case EXEC_OACC_CACHE
:
11446 case EXEC_OACC_ENTER_DATA
:
11447 case EXEC_OACC_EXIT_DATA
:
11448 case EXEC_OACC_ATOMIC
:
11449 case EXEC_OACC_DECLARE
:
11450 gfc_resolve_oacc_directive (code
, ns
);
11453 case EXEC_OMP_ATOMIC
:
11454 case EXEC_OMP_BARRIER
:
11455 case EXEC_OMP_CANCEL
:
11456 case EXEC_OMP_CANCELLATION_POINT
:
11457 case EXEC_OMP_CRITICAL
:
11458 case EXEC_OMP_FLUSH
:
11459 case EXEC_OMP_DISTRIBUTE
:
11460 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
11461 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
11462 case EXEC_OMP_DISTRIBUTE_SIMD
:
11464 case EXEC_OMP_DO_SIMD
:
11465 case EXEC_OMP_MASTER
:
11466 case EXEC_OMP_ORDERED
:
11467 case EXEC_OMP_SECTIONS
:
11468 case EXEC_OMP_SIMD
:
11469 case EXEC_OMP_SINGLE
:
11470 case EXEC_OMP_TARGET
:
11471 case EXEC_OMP_TARGET_DATA
:
11472 case EXEC_OMP_TARGET_ENTER_DATA
:
11473 case EXEC_OMP_TARGET_EXIT_DATA
:
11474 case EXEC_OMP_TARGET_PARALLEL
:
11475 case EXEC_OMP_TARGET_PARALLEL_DO
:
11476 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11477 case EXEC_OMP_TARGET_SIMD
:
11478 case EXEC_OMP_TARGET_TEAMS
:
11479 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11480 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11481 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11482 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11483 case EXEC_OMP_TARGET_UPDATE
:
11484 case EXEC_OMP_TASK
:
11485 case EXEC_OMP_TASKGROUP
:
11486 case EXEC_OMP_TASKLOOP
:
11487 case EXEC_OMP_TASKLOOP_SIMD
:
11488 case EXEC_OMP_TASKWAIT
:
11489 case EXEC_OMP_TASKYIELD
:
11490 case EXEC_OMP_TEAMS
:
11491 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11492 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11493 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11494 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11495 case EXEC_OMP_WORKSHARE
:
11496 gfc_resolve_omp_directive (code
, ns
);
11499 case EXEC_OMP_PARALLEL
:
11500 case EXEC_OMP_PARALLEL_DO
:
11501 case EXEC_OMP_PARALLEL_DO_SIMD
:
11502 case EXEC_OMP_PARALLEL_SECTIONS
:
11503 case EXEC_OMP_PARALLEL_WORKSHARE
:
11504 omp_workshare_save
= omp_workshare_flag
;
11505 omp_workshare_flag
= 0;
11506 gfc_resolve_omp_directive (code
, ns
);
11507 omp_workshare_flag
= omp_workshare_save
;
11511 gfc_internal_error ("gfc_resolve_code(): Bad statement code");
11515 cs_base
= frame
.prev
;
11519 /* Resolve initial values and make sure they are compatible with
11523 resolve_values (gfc_symbol
*sym
)
11527 if (sym
->value
== NULL
)
11530 if (sym
->value
->expr_type
== EXPR_STRUCTURE
)
11531 t
= resolve_structure_cons (sym
->value
, 1);
11533 t
= gfc_resolve_expr (sym
->value
);
11538 gfc_check_assign_symbol (sym
, NULL
, sym
->value
);
11542 /* Verify any BIND(C) derived types in the namespace so we can report errors
11543 for them once, rather than for each variable declared of that type. */
11546 resolve_bind_c_derived_types (gfc_symbol
*derived_sym
)
11548 if (derived_sym
!= NULL
&& derived_sym
->attr
.flavor
== FL_DERIVED
11549 && derived_sym
->attr
.is_bind_c
== 1)
11550 verify_bind_c_derived_type (derived_sym
);
11556 /* Check the interfaces of DTIO procedures associated with derived
11557 type 'sym'. These procedures can either have typebound bindings or
11558 can appear in DTIO generic interfaces. */
11561 gfc_verify_DTIO_procedures (gfc_symbol
*sym
)
11563 if (!sym
|| sym
->attr
.flavor
!= FL_DERIVED
)
11566 gfc_check_dtio_interfaces (sym
);
11571 /* Verify that any binding labels used in a given namespace do not collide
11572 with the names or binding labels of any global symbols. Multiple INTERFACE
11573 for the same procedure are permitted. */
11576 gfc_verify_binding_labels (gfc_symbol
*sym
)
11579 const char *module
;
11581 if (!sym
|| !sym
->attr
.is_bind_c
|| sym
->attr
.is_iso_c
11582 || sym
->attr
.flavor
== FL_DERIVED
|| !sym
->binding_label
)
11585 gsym
= gfc_find_case_gsymbol (gfc_gsym_root
, sym
->binding_label
);
11588 module
= sym
->module
;
11589 else if (sym
->ns
&& sym
->ns
->proc_name
11590 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
11591 module
= sym
->ns
->proc_name
->name
;
11592 else if (sym
->ns
&& sym
->ns
->parent
11593 && sym
->ns
&& sym
->ns
->parent
->proc_name
11594 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
11595 module
= sym
->ns
->parent
->proc_name
->name
;
11601 && (gsym
->type
== GSYM_FUNCTION
|| gsym
->type
== GSYM_SUBROUTINE
)))
11604 gsym
= gfc_get_gsymbol (sym
->binding_label
);
11605 gsym
->where
= sym
->declared_at
;
11606 gsym
->sym_name
= sym
->name
;
11607 gsym
->binding_label
= sym
->binding_label
;
11608 gsym
->ns
= sym
->ns
;
11609 gsym
->mod_name
= module
;
11610 if (sym
->attr
.function
)
11611 gsym
->type
= GSYM_FUNCTION
;
11612 else if (sym
->attr
.subroutine
)
11613 gsym
->type
= GSYM_SUBROUTINE
;
11614 /* Mark as variable/procedure as defined, unless its an INTERFACE. */
11615 gsym
->defined
= sym
->attr
.if_source
!= IFSRC_IFBODY
;
11619 if (sym
->attr
.flavor
== FL_VARIABLE
&& gsym
->type
!= GSYM_UNKNOWN
)
11621 gfc_error ("Variable %qs with binding label %qs at %L uses the same global "
11622 "identifier as entity at %L", sym
->name
,
11623 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11624 /* Clear the binding label to prevent checking multiple times. */
11625 sym
->binding_label
= NULL
;
11628 else if (sym
->attr
.flavor
== FL_VARIABLE
&& module
11629 && (strcmp (module
, gsym
->mod_name
) != 0
11630 || strcmp (sym
->name
, gsym
->sym_name
) != 0))
11632 /* This can only happen if the variable is defined in a module - if it
11633 isn't the same module, reject it. */
11634 gfc_error ("Variable %qs from module %qs with binding label %qs at %L "
11635 "uses the same global identifier as entity at %L from module %qs",
11636 sym
->name
, module
, sym
->binding_label
,
11637 &sym
->declared_at
, &gsym
->where
, gsym
->mod_name
);
11638 sym
->binding_label
= NULL
;
11640 else if ((sym
->attr
.function
|| sym
->attr
.subroutine
)
11641 && ((gsym
->type
!= GSYM_SUBROUTINE
&& gsym
->type
!= GSYM_FUNCTION
)
11642 || (gsym
->defined
&& sym
->attr
.if_source
!= IFSRC_IFBODY
))
11643 && sym
!= gsym
->ns
->proc_name
11644 && (module
!= gsym
->mod_name
11645 || strcmp (gsym
->sym_name
, sym
->name
) != 0
11646 || (module
&& strcmp (module
, gsym
->mod_name
) != 0)))
11648 /* Print an error if the procedure is defined multiple times; we have to
11649 exclude references to the same procedure via module association or
11650 multiple checks for the same procedure. */
11651 gfc_error ("Procedure %qs with binding label %qs at %L uses the same "
11652 "global identifier as entity at %L", sym
->name
,
11653 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11654 sym
->binding_label
= NULL
;
11659 /* Resolve an index expression. */
11662 resolve_index_expr (gfc_expr
*e
)
11664 if (!gfc_resolve_expr (e
))
11667 if (!gfc_simplify_expr (e
, 0))
11670 if (!gfc_specification_expr (e
))
11677 /* Resolve a charlen structure. */
11680 resolve_charlen (gfc_charlen
*cl
)
11683 bool saved_specification_expr
;
11689 saved_specification_expr
= specification_expr
;
11690 specification_expr
= true;
11692 if (cl
->length_from_typespec
)
11694 if (!gfc_resolve_expr (cl
->length
))
11696 specification_expr
= saved_specification_expr
;
11700 if (!gfc_simplify_expr (cl
->length
, 0))
11702 specification_expr
= saved_specification_expr
;
11706 /* cl->length has been resolved. It should have an integer type. */
11707 if (cl
->length
->ts
.type
!= BT_INTEGER
)
11709 gfc_error ("Scalar INTEGER expression expected at %L",
11710 &cl
->length
->where
);
11716 if (!resolve_index_expr (cl
->length
))
11718 specification_expr
= saved_specification_expr
;
11723 /* F2008, 4.4.3.2: If the character length parameter value evaluates to
11724 a negative value, the length of character entities declared is zero. */
11725 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11726 && mpz_sgn (cl
->length
->value
.integer
) < 0)
11727 gfc_replace_expr (cl
->length
,
11728 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 0));
11730 /* Check that the character length is not too large. */
11731 k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
11732 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11733 && cl
->length
->ts
.type
== BT_INTEGER
11734 && mpz_cmp (cl
->length
->value
.integer
, gfc_integer_kinds
[k
].huge
) > 0)
11736 gfc_error ("String length at %L is too large", &cl
->length
->where
);
11737 specification_expr
= saved_specification_expr
;
11741 specification_expr
= saved_specification_expr
;
11746 /* Test for non-constant shape arrays. */
11749 is_non_constant_shape_array (gfc_symbol
*sym
)
11755 not_constant
= false;
11756 if (sym
->as
!= NULL
)
11758 /* Unfortunately, !gfc_is_compile_time_shape hits a legal case that
11759 has not been simplified; parameter array references. Do the
11760 simplification now. */
11761 for (i
= 0; i
< sym
->as
->rank
+ sym
->as
->corank
; i
++)
11763 e
= sym
->as
->lower
[i
];
11764 if (e
&& (!resolve_index_expr(e
)
11765 || !gfc_is_constant_expr (e
)))
11766 not_constant
= true;
11767 e
= sym
->as
->upper
[i
];
11768 if (e
&& (!resolve_index_expr(e
)
11769 || !gfc_is_constant_expr (e
)))
11770 not_constant
= true;
11773 return not_constant
;
11776 /* Given a symbol and an initialization expression, add code to initialize
11777 the symbol to the function entry. */
11779 build_init_assign (gfc_symbol
*sym
, gfc_expr
*init
)
11783 gfc_namespace
*ns
= sym
->ns
;
11785 /* Search for the function namespace if this is a contained
11786 function without an explicit result. */
11787 if (sym
->attr
.function
&& sym
== sym
->result
11788 && sym
->name
!= sym
->ns
->proc_name
->name
)
11790 ns
= ns
->contained
;
11791 for (;ns
; ns
= ns
->sibling
)
11792 if (strcmp (ns
->proc_name
->name
, sym
->name
) == 0)
11798 gfc_free_expr (init
);
11802 /* Build an l-value expression for the result. */
11803 lval
= gfc_lval_expr_from_sym (sym
);
11805 /* Add the code at scope entry. */
11806 init_st
= gfc_get_code (EXEC_INIT_ASSIGN
);
11807 init_st
->next
= ns
->code
;
11808 ns
->code
= init_st
;
11810 /* Assign the default initializer to the l-value. */
11811 init_st
->loc
= sym
->declared_at
;
11812 init_st
->expr1
= lval
;
11813 init_st
->expr2
= init
;
11817 /* Whether or not we can generate a default initializer for a symbol. */
11820 can_generate_init (gfc_symbol
*sym
)
11822 symbol_attribute
*a
;
11827 /* These symbols should never have a default initialization. */
11832 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
11833 && (CLASS_DATA (sym
)->attr
.class_pointer
11834 || CLASS_DATA (sym
)->attr
.proc_pointer
))
11835 || a
->in_equivalence
11842 || (!a
->referenced
&& !a
->result
)
11843 || (a
->dummy
&& a
->intent
!= INTENT_OUT
)
11844 || (a
->function
&& sym
!= sym
->result
)
11849 /* Assign the default initializer to a derived type variable or result. */
11852 apply_default_init (gfc_symbol
*sym
)
11854 gfc_expr
*init
= NULL
;
11856 if (sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
11859 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
)
11860 init
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
11862 if (init
== NULL
&& sym
->ts
.type
!= BT_CLASS
)
11865 build_init_assign (sym
, init
);
11866 sym
->attr
.referenced
= 1;
11870 /* Build an initializer for a local. Returns null if the symbol should not have
11871 a default initialization. */
11874 build_default_init_expr (gfc_symbol
*sym
)
11876 /* These symbols should never have a default initialization. */
11877 if (sym
->attr
.allocatable
11878 || sym
->attr
.external
11880 || sym
->attr
.pointer
11881 || sym
->attr
.in_equivalence
11882 || sym
->attr
.in_common
11885 || sym
->attr
.cray_pointee
11886 || sym
->attr
.cray_pointer
11890 /* Get the appropriate init expression. */
11891 return gfc_build_default_init_expr (&sym
->ts
, &sym
->declared_at
);
11894 /* Add an initialization expression to a local variable. */
11896 apply_default_init_local (gfc_symbol
*sym
)
11898 gfc_expr
*init
= NULL
;
11900 /* The symbol should be a variable or a function return value. */
11901 if ((sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
11902 || (sym
->attr
.function
&& sym
->result
!= sym
))
11905 /* Try to build the initializer expression. If we can't initialize
11906 this symbol, then init will be NULL. */
11907 init
= build_default_init_expr (sym
);
11911 /* For saved variables, we don't want to add an initializer at function
11912 entry, so we just add a static initializer. Note that automatic variables
11913 are stack allocated even with -fno-automatic; we have also to exclude
11914 result variable, which are also nonstatic. */
11915 if (!sym
->attr
.automatic
11916 && (sym
->attr
.save
|| sym
->ns
->save_all
11917 || (flag_max_stack_var_size
== 0 && !sym
->attr
.result
11918 && (sym
->ns
->proc_name
&& !sym
->ns
->proc_name
->attr
.recursive
)
11919 && (!sym
->attr
.dimension
|| !is_non_constant_shape_array (sym
)))))
11921 /* Don't clobber an existing initializer! */
11922 gcc_assert (sym
->value
== NULL
);
11927 build_init_assign (sym
, init
);
11931 /* Resolution of common features of flavors variable and procedure. */
11934 resolve_fl_var_and_proc (gfc_symbol
*sym
, int mp_flag
)
11936 gfc_array_spec
*as
;
11938 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
11939 as
= CLASS_DATA (sym
)->as
;
11943 /* Constraints on deferred shape variable. */
11944 if (as
== NULL
|| as
->type
!= AS_DEFERRED
)
11946 bool pointer
, allocatable
, dimension
;
11948 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
11950 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
11951 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
11952 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
11956 pointer
= sym
->attr
.pointer
&& !sym
->attr
.select_type_temporary
;
11957 allocatable
= sym
->attr
.allocatable
;
11958 dimension
= sym
->attr
.dimension
;
11963 if (dimension
&& as
->type
!= AS_ASSUMED_RANK
)
11965 gfc_error ("Allocatable array %qs at %L must have a deferred "
11966 "shape or assumed rank", sym
->name
, &sym
->declared_at
);
11969 else if (!gfc_notify_std (GFC_STD_F2003
, "Scalar object "
11970 "%qs at %L may not be ALLOCATABLE",
11971 sym
->name
, &sym
->declared_at
))
11975 if (pointer
&& dimension
&& as
->type
!= AS_ASSUMED_RANK
)
11977 gfc_error ("Array pointer %qs at %L must have a deferred shape or "
11978 "assumed rank", sym
->name
, &sym
->declared_at
);
11984 if (!mp_flag
&& !sym
->attr
.allocatable
&& !sym
->attr
.pointer
11985 && sym
->ts
.type
!= BT_CLASS
&& !sym
->assoc
)
11987 gfc_error ("Array %qs at %L cannot have a deferred shape",
11988 sym
->name
, &sym
->declared_at
);
11993 /* Constraints on polymorphic variables. */
11994 if (sym
->ts
.type
== BT_CLASS
&& !(sym
->result
&& sym
->result
!= sym
))
11997 if (sym
->attr
.class_ok
11998 && !sym
->attr
.select_type_temporary
11999 && !UNLIMITED_POLY (sym
)
12000 && !gfc_type_is_extensible (CLASS_DATA (sym
)->ts
.u
.derived
))
12002 gfc_error ("Type %qs of CLASS variable %qs at %L is not extensible",
12003 CLASS_DATA (sym
)->ts
.u
.derived
->name
, sym
->name
,
12004 &sym
->declared_at
);
12009 /* Assume that use associated symbols were checked in the module ns.
12010 Class-variables that are associate-names are also something special
12011 and excepted from the test. */
12012 if (!sym
->attr
.class_ok
&& !sym
->attr
.use_assoc
&& !sym
->assoc
)
12014 gfc_error ("CLASS variable %qs at %L must be dummy, allocatable "
12015 "or pointer", sym
->name
, &sym
->declared_at
);
12024 /* Additional checks for symbols with flavor variable and derived
12025 type. To be called from resolve_fl_variable. */
12028 resolve_fl_variable_derived (gfc_symbol
*sym
, int no_init_flag
)
12030 gcc_assert (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
);
12032 /* Check to see if a derived type is blocked from being host
12033 associated by the presence of another class I symbol in the same
12034 namespace. 14.6.1.3 of the standard and the discussion on
12035 comp.lang.fortran. */
12036 if (sym
->ns
!= sym
->ts
.u
.derived
->ns
12037 && sym
->ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
12040 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 0, &s
);
12041 if (s
&& s
->attr
.generic
)
12042 s
= gfc_find_dt_in_generic (s
);
12043 if (s
&& !gfc_fl_struct (s
->attr
.flavor
))
12045 gfc_error ("The type %qs cannot be host associated at %L "
12046 "because it is blocked by an incompatible object "
12047 "of the same name declared at %L",
12048 sym
->ts
.u
.derived
->name
, &sym
->declared_at
,
12054 /* 4th constraint in section 11.3: "If an object of a type for which
12055 component-initialization is specified (R429) appears in the
12056 specification-part of a module and does not have the ALLOCATABLE
12057 or POINTER attribute, the object shall have the SAVE attribute."
12059 The check for initializers is performed with
12060 gfc_has_default_initializer because gfc_default_initializer generates
12061 a hidden default for allocatable components. */
12062 if (!(sym
->value
|| no_init_flag
) && sym
->ns
->proc_name
12063 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12064 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
) && !sym
->attr
.save
12065 && !sym
->attr
.pointer
&& !sym
->attr
.allocatable
12066 && gfc_has_default_initializer (sym
->ts
.u
.derived
)
12067 && !gfc_notify_std (GFC_STD_F2008
, "Implied SAVE for module variable "
12068 "%qs at %L, needed due to the default "
12069 "initialization", sym
->name
, &sym
->declared_at
))
12072 /* Assign default initializer. */
12073 if (!(sym
->value
|| sym
->attr
.pointer
|| sym
->attr
.allocatable
)
12074 && (!no_init_flag
|| sym
->attr
.intent
== INTENT_OUT
))
12075 sym
->value
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12081 /* F2008, C402 (R401): A colon shall not be used as a type-param-value
12082 except in the declaration of an entity or component that has the POINTER
12083 or ALLOCATABLE attribute. */
12086 deferred_requirements (gfc_symbol
*sym
)
12088 if (sym
->ts
.deferred
12089 && !(sym
->attr
.pointer
12090 || sym
->attr
.allocatable
12091 || sym
->attr
.associate_var
12092 || sym
->attr
.omp_udr_artificial_var
))
12094 gfc_error ("Entity %qs at %L has a deferred type parameter and "
12095 "requires either the POINTER or ALLOCATABLE attribute",
12096 sym
->name
, &sym
->declared_at
);
12103 /* Resolve symbols with flavor variable. */
12106 resolve_fl_variable (gfc_symbol
*sym
, int mp_flag
)
12108 int no_init_flag
, automatic_flag
;
12110 const char *auto_save_msg
;
12111 bool saved_specification_expr
;
12113 auto_save_msg
= "Automatic object %qs at %L cannot have the "
12116 if (!resolve_fl_var_and_proc (sym
, mp_flag
))
12119 /* Set this flag to check that variables are parameters of all entries.
12120 This check is effected by the call to gfc_resolve_expr through
12121 is_non_constant_shape_array. */
12122 saved_specification_expr
= specification_expr
;
12123 specification_expr
= true;
12125 if (sym
->ns
->proc_name
12126 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12127 || sym
->ns
->proc_name
->attr
.is_main_program
)
12128 && !sym
->attr
.use_assoc
12129 && !sym
->attr
.allocatable
12130 && !sym
->attr
.pointer
12131 && is_non_constant_shape_array (sym
))
12133 /* F08:C541. The shape of an array defined in a main program or module
12134 * needs to be constant. */
12135 gfc_error ("The module or main program array %qs at %L must "
12136 "have constant shape", sym
->name
, &sym
->declared_at
);
12137 specification_expr
= saved_specification_expr
;
12141 /* Constraints on deferred type parameter. */
12142 if (!deferred_requirements (sym
))
12145 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.associate_var
)
12147 /* Make sure that character string variables with assumed length are
12148 dummy arguments. */
12149 e
= sym
->ts
.u
.cl
->length
;
12150 if (e
== NULL
&& !sym
->attr
.dummy
&& !sym
->attr
.result
12151 && !sym
->ts
.deferred
&& !sym
->attr
.select_type_temporary
12152 && !sym
->attr
.omp_udr_artificial_var
)
12154 gfc_error ("Entity with assumed character length at %L must be a "
12155 "dummy argument or a PARAMETER", &sym
->declared_at
);
12156 specification_expr
= saved_specification_expr
;
12160 if (e
&& sym
->attr
.save
== SAVE_EXPLICIT
&& !gfc_is_constant_expr (e
))
12162 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12163 specification_expr
= saved_specification_expr
;
12167 if (!gfc_is_constant_expr (e
)
12168 && !(e
->expr_type
== EXPR_VARIABLE
12169 && e
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
))
12171 if (!sym
->attr
.use_assoc
&& sym
->ns
->proc_name
12172 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12173 || sym
->ns
->proc_name
->attr
.is_main_program
))
12175 gfc_error ("%qs at %L must have constant character length "
12176 "in this context", sym
->name
, &sym
->declared_at
);
12177 specification_expr
= saved_specification_expr
;
12180 if (sym
->attr
.in_common
)
12182 gfc_error ("COMMON variable %qs at %L must have constant "
12183 "character length", sym
->name
, &sym
->declared_at
);
12184 specification_expr
= saved_specification_expr
;
12190 if (sym
->value
== NULL
&& sym
->attr
.referenced
)
12191 apply_default_init_local (sym
); /* Try to apply a default initialization. */
12193 /* Determine if the symbol may not have an initializer. */
12194 no_init_flag
= automatic_flag
= 0;
12195 if (sym
->attr
.allocatable
|| sym
->attr
.external
|| sym
->attr
.dummy
12196 || sym
->attr
.intrinsic
|| sym
->attr
.result
)
12198 else if ((sym
->attr
.dimension
|| sym
->attr
.codimension
) && !sym
->attr
.pointer
12199 && is_non_constant_shape_array (sym
))
12201 no_init_flag
= automatic_flag
= 1;
12203 /* Also, they must not have the SAVE attribute.
12204 SAVE_IMPLICIT is checked below. */
12205 if (sym
->as
&& sym
->attr
.codimension
)
12207 int corank
= sym
->as
->corank
;
12208 sym
->as
->corank
= 0;
12209 no_init_flag
= automatic_flag
= is_non_constant_shape_array (sym
);
12210 sym
->as
->corank
= corank
;
12212 if (automatic_flag
&& sym
->attr
.save
== SAVE_EXPLICIT
)
12214 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12215 specification_expr
= saved_specification_expr
;
12220 /* Ensure that any initializer is simplified. */
12222 gfc_simplify_expr (sym
->value
, 1);
12224 /* Reject illegal initializers. */
12225 if (!sym
->mark
&& sym
->value
)
12227 if (sym
->attr
.allocatable
|| (sym
->ts
.type
== BT_CLASS
12228 && CLASS_DATA (sym
)->attr
.allocatable
))
12229 gfc_error ("Allocatable %qs at %L cannot have an initializer",
12230 sym
->name
, &sym
->declared_at
);
12231 else if (sym
->attr
.external
)
12232 gfc_error ("External %qs at %L cannot have an initializer",
12233 sym
->name
, &sym
->declared_at
);
12234 else if (sym
->attr
.dummy
12235 && !(sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.intent
== INTENT_OUT
))
12236 gfc_error ("Dummy %qs at %L cannot have an initializer",
12237 sym
->name
, &sym
->declared_at
);
12238 else if (sym
->attr
.intrinsic
)
12239 gfc_error ("Intrinsic %qs at %L cannot have an initializer",
12240 sym
->name
, &sym
->declared_at
);
12241 else if (sym
->attr
.result
)
12242 gfc_error ("Function result %qs at %L cannot have an initializer",
12243 sym
->name
, &sym
->declared_at
);
12244 else if (automatic_flag
)
12245 gfc_error ("Automatic array %qs at %L cannot have an initializer",
12246 sym
->name
, &sym
->declared_at
);
12248 goto no_init_error
;
12249 specification_expr
= saved_specification_expr
;
12254 if (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
)
12256 bool res
= resolve_fl_variable_derived (sym
, no_init_flag
);
12257 specification_expr
= saved_specification_expr
;
12261 specification_expr
= saved_specification_expr
;
12266 /* Compare the dummy characteristics of a module procedure interface
12267 declaration with the corresponding declaration in a submodule. */
12268 static gfc_formal_arglist
*new_formal
;
12269 static char errmsg
[200];
12272 compare_fsyms (gfc_symbol
*sym
)
12276 if (sym
== NULL
|| new_formal
== NULL
)
12279 fsym
= new_formal
->sym
;
12284 if (strcmp (sym
->name
, fsym
->name
) == 0)
12286 if (!gfc_check_dummy_characteristics (fsym
, sym
, true, errmsg
, 200))
12287 gfc_error ("%s at %L", errmsg
, &fsym
->declared_at
);
12292 /* Resolve a procedure. */
12295 resolve_fl_procedure (gfc_symbol
*sym
, int mp_flag
)
12297 gfc_formal_arglist
*arg
;
12299 if (sym
->attr
.function
12300 && !resolve_fl_var_and_proc (sym
, mp_flag
))
12303 if (sym
->ts
.type
== BT_CHARACTER
)
12305 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
12307 if (cl
&& cl
->length
&& gfc_is_constant_expr (cl
->length
)
12308 && !resolve_charlen (cl
))
12311 if ((!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
12312 && sym
->attr
.proc
== PROC_ST_FUNCTION
)
12314 gfc_error ("Character-valued statement function %qs at %L must "
12315 "have constant length", sym
->name
, &sym
->declared_at
);
12320 /* Ensure that derived type for are not of a private type. Internal
12321 module procedures are excluded by 2.2.3.3 - i.e., they are not
12322 externally accessible and can access all the objects accessible in
12324 if (!(sym
->ns
->parent
12325 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12326 && gfc_check_symbol_access (sym
))
12328 gfc_interface
*iface
;
12330 for (arg
= gfc_sym_get_dummy_args (sym
); arg
; arg
= arg
->next
)
12333 && arg
->sym
->ts
.type
== BT_DERIVED
12334 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12335 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12336 && !gfc_notify_std (GFC_STD_F2003
, "%qs is of a PRIVATE type "
12337 "and cannot be a dummy argument"
12338 " of %qs, which is PUBLIC at %L",
12339 arg
->sym
->name
, sym
->name
,
12340 &sym
->declared_at
))
12342 /* Stop this message from recurring. */
12343 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12348 /* PUBLIC interfaces may expose PRIVATE procedures that take types
12349 PRIVATE to the containing module. */
12350 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
12352 for (arg
= gfc_sym_get_dummy_args (iface
->sym
); arg
; arg
= arg
->next
)
12355 && arg
->sym
->ts
.type
== BT_DERIVED
12356 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12357 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12358 && !gfc_notify_std (GFC_STD_F2003
, "Procedure %qs in "
12359 "PUBLIC interface %qs at %L "
12360 "takes dummy arguments of %qs which "
12361 "is PRIVATE", iface
->sym
->name
,
12362 sym
->name
, &iface
->sym
->declared_at
,
12363 gfc_typename(&arg
->sym
->ts
)))
12365 /* Stop this message from recurring. */
12366 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12373 if (sym
->attr
.function
&& sym
->value
&& sym
->attr
.proc
!= PROC_ST_FUNCTION
12374 && !sym
->attr
.proc_pointer
)
12376 gfc_error ("Function %qs at %L cannot have an initializer",
12377 sym
->name
, &sym
->declared_at
);
12381 /* An external symbol may not have an initializer because it is taken to be
12382 a procedure. Exception: Procedure Pointers. */
12383 if (sym
->attr
.external
&& sym
->value
&& !sym
->attr
.proc_pointer
)
12385 gfc_error ("External object %qs at %L may not have an initializer",
12386 sym
->name
, &sym
->declared_at
);
12390 /* An elemental function is required to return a scalar 12.7.1 */
12391 if (sym
->attr
.elemental
&& sym
->attr
.function
&& sym
->as
)
12393 gfc_error ("ELEMENTAL function %qs at %L must have a scalar "
12394 "result", sym
->name
, &sym
->declared_at
);
12395 /* Reset so that the error only occurs once. */
12396 sym
->attr
.elemental
= 0;
12400 if (sym
->attr
.proc
== PROC_ST_FUNCTION
12401 && (sym
->attr
.allocatable
|| sym
->attr
.pointer
))
12403 gfc_error ("Statement function %qs at %L may not have pointer or "
12404 "allocatable attribute", sym
->name
, &sym
->declared_at
);
12408 /* 5.1.1.5 of the Standard: A function name declared with an asterisk
12409 char-len-param shall not be array-valued, pointer-valued, recursive
12410 or pure. ....snip... A character value of * may only be used in the
12411 following ways: (i) Dummy arg of procedure - dummy associates with
12412 actual length; (ii) To declare a named constant; or (iii) External
12413 function - but length must be declared in calling scoping unit. */
12414 if (sym
->attr
.function
12415 && sym
->ts
.type
== BT_CHARACTER
&& !sym
->ts
.deferred
12416 && sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
== NULL
)
12418 if ((sym
->as
&& sym
->as
->rank
) || (sym
->attr
.pointer
)
12419 || (sym
->attr
.recursive
) || (sym
->attr
.pure
))
12421 if (sym
->as
&& sym
->as
->rank
)
12422 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12423 "array-valued", sym
->name
, &sym
->declared_at
);
12425 if (sym
->attr
.pointer
)
12426 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12427 "pointer-valued", sym
->name
, &sym
->declared_at
);
12429 if (sym
->attr
.pure
)
12430 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12431 "pure", sym
->name
, &sym
->declared_at
);
12433 if (sym
->attr
.recursive
)
12434 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12435 "recursive", sym
->name
, &sym
->declared_at
);
12440 /* Appendix B.2 of the standard. Contained functions give an
12441 error anyway. Deferred character length is an F2003 feature.
12442 Don't warn on intrinsic conversion functions, which start
12443 with two underscores. */
12444 if (!sym
->attr
.contained
&& !sym
->ts
.deferred
12445 && (sym
->name
[0] != '_' || sym
->name
[1] != '_'))
12446 gfc_notify_std (GFC_STD_F95_OBS
,
12447 "CHARACTER(*) function %qs at %L",
12448 sym
->name
, &sym
->declared_at
);
12451 /* F2008, C1218. */
12452 if (sym
->attr
.elemental
)
12454 if (sym
->attr
.proc_pointer
)
12456 gfc_error ("Procedure pointer %qs at %L shall not be elemental",
12457 sym
->name
, &sym
->declared_at
);
12460 if (sym
->attr
.dummy
)
12462 gfc_error ("Dummy procedure %qs at %L shall not be elemental",
12463 sym
->name
, &sym
->declared_at
);
12468 /* F2018, C15100: "The result of an elemental function shall be scalar,
12469 and shall not have the POINTER or ALLOCATABLE attribute." The scalar
12470 pointer is tested and caught elsewhere. */
12471 if (sym
->attr
.elemental
&& sym
->result
12472 && (sym
->result
->attr
.allocatable
|| sym
->result
->attr
.pointer
))
12474 gfc_error ("Function result variable %qs at %L of elemental "
12475 "function %qs shall not have an ALLOCATABLE or POINTER "
12476 "attribute", sym
->result
->name
,
12477 &sym
->result
->declared_at
, sym
->name
);
12481 if (sym
->attr
.is_bind_c
&& sym
->attr
.is_c_interop
!= 1)
12483 gfc_formal_arglist
*curr_arg
;
12484 int has_non_interop_arg
= 0;
12486 if (!verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
12487 sym
->common_block
))
12489 /* Clear these to prevent looking at them again if there was an
12491 sym
->attr
.is_bind_c
= 0;
12492 sym
->attr
.is_c_interop
= 0;
12493 sym
->ts
.is_c_interop
= 0;
12497 /* So far, no errors have been found. */
12498 sym
->attr
.is_c_interop
= 1;
12499 sym
->ts
.is_c_interop
= 1;
12502 curr_arg
= gfc_sym_get_dummy_args (sym
);
12503 while (curr_arg
!= NULL
)
12505 /* Skip implicitly typed dummy args here. */
12506 if (curr_arg
->sym
&& curr_arg
->sym
->attr
.implicit_type
== 0)
12507 if (!gfc_verify_c_interop_param (curr_arg
->sym
))
12508 /* If something is found to fail, record the fact so we
12509 can mark the symbol for the procedure as not being
12510 BIND(C) to try and prevent multiple errors being
12512 has_non_interop_arg
= 1;
12514 curr_arg
= curr_arg
->next
;
12517 /* See if any of the arguments were not interoperable and if so, clear
12518 the procedure symbol to prevent duplicate error messages. */
12519 if (has_non_interop_arg
!= 0)
12521 sym
->attr
.is_c_interop
= 0;
12522 sym
->ts
.is_c_interop
= 0;
12523 sym
->attr
.is_bind_c
= 0;
12527 if (!sym
->attr
.proc_pointer
)
12529 if (sym
->attr
.save
== SAVE_EXPLICIT
)
12531 gfc_error ("PROCEDURE attribute conflicts with SAVE attribute "
12532 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12535 if (sym
->attr
.intent
)
12537 gfc_error ("PROCEDURE attribute conflicts with INTENT attribute "
12538 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12541 if (sym
->attr
.subroutine
&& sym
->attr
.result
)
12543 gfc_error ("PROCEDURE attribute conflicts with RESULT attribute "
12544 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12547 if (sym
->attr
.external
&& sym
->attr
.function
&& !sym
->attr
.module_procedure
12548 && ((sym
->attr
.if_source
== IFSRC_DECL
&& !sym
->attr
.procedure
)
12549 || sym
->attr
.contained
))
12551 gfc_error ("EXTERNAL attribute conflicts with FUNCTION attribute "
12552 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12555 if (strcmp ("ppr@", sym
->name
) == 0)
12557 gfc_error ("Procedure pointer result %qs at %L "
12558 "is missing the pointer attribute",
12559 sym
->ns
->proc_name
->name
, &sym
->declared_at
);
12564 /* Assume that a procedure whose body is not known has references
12565 to external arrays. */
12566 if (sym
->attr
.if_source
!= IFSRC_DECL
)
12567 sym
->attr
.array_outer_dependency
= 1;
12569 /* Compare the characteristics of a module procedure with the
12570 interface declaration. Ideally this would be done with
12571 gfc_compare_interfaces but, at present, the formal interface
12572 cannot be copied to the ts.interface. */
12573 if (sym
->attr
.module_procedure
12574 && sym
->attr
.if_source
== IFSRC_DECL
)
12577 char name
[2*GFC_MAX_SYMBOL_LEN
+ 1];
12579 char *submodule_name
;
12580 strcpy (name
, sym
->ns
->proc_name
->name
);
12581 module_name
= strtok (name
, ".");
12582 submodule_name
= strtok (NULL
, ".");
12584 iface
= sym
->tlink
;
12587 /* Make sure that the result uses the correct charlen for deferred
12589 if (iface
&& sym
->result
12590 && iface
->ts
.type
== BT_CHARACTER
12591 && iface
->ts
.deferred
)
12592 sym
->result
->ts
.u
.cl
= iface
->ts
.u
.cl
;
12597 /* Check the procedure characteristics. */
12598 if (sym
->attr
.elemental
!= iface
->attr
.elemental
)
12600 gfc_error ("Mismatch in ELEMENTAL attribute between MODULE "
12601 "PROCEDURE at %L and its interface in %s",
12602 &sym
->declared_at
, module_name
);
12606 if (sym
->attr
.pure
!= iface
->attr
.pure
)
12608 gfc_error ("Mismatch in PURE attribute between MODULE "
12609 "PROCEDURE at %L and its interface in %s",
12610 &sym
->declared_at
, module_name
);
12614 if (sym
->attr
.recursive
!= iface
->attr
.recursive
)
12616 gfc_error ("Mismatch in RECURSIVE attribute between MODULE "
12617 "PROCEDURE at %L and its interface in %s",
12618 &sym
->declared_at
, module_name
);
12622 /* Check the result characteristics. */
12623 if (!gfc_check_result_characteristics (sym
, iface
, errmsg
, 200))
12625 gfc_error ("%s between the MODULE PROCEDURE declaration "
12626 "in MODULE %qs and the declaration at %L in "
12628 errmsg
, module_name
, &sym
->declared_at
,
12629 submodule_name
? submodule_name
: module_name
);
12634 /* Check the characteristics of the formal arguments. */
12635 if (sym
->formal
&& sym
->formal_ns
)
12637 for (arg
= sym
->formal
; arg
&& arg
->sym
; arg
= arg
->next
)
12640 gfc_traverse_ns (sym
->formal_ns
, compare_fsyms
);
12648 /* Resolve a list of finalizer procedures. That is, after they have hopefully
12649 been defined and we now know their defined arguments, check that they fulfill
12650 the requirements of the standard for procedures used as finalizers. */
12653 gfc_resolve_finalizers (gfc_symbol
* derived
, bool *finalizable
)
12655 gfc_finalizer
* list
;
12656 gfc_finalizer
** prev_link
; /* For removing wrong entries from the list. */
12657 bool result
= true;
12658 bool seen_scalar
= false;
12661 gfc_symbol
*parent
= gfc_get_derived_super_type (derived
);
12664 gfc_resolve_finalizers (parent
, finalizable
);
12666 /* Ensure that derived-type components have a their finalizers resolved. */
12667 bool has_final
= derived
->f2k_derived
&& derived
->f2k_derived
->finalizers
;
12668 for (c
= derived
->components
; c
; c
= c
->next
)
12669 if (c
->ts
.type
== BT_DERIVED
12670 && !c
->attr
.pointer
&& !c
->attr
.proc_pointer
&& !c
->attr
.allocatable
)
12672 bool has_final2
= false;
12673 if (!gfc_resolve_finalizers (c
->ts
.u
.derived
, &has_final2
))
12674 return false; /* Error. */
12675 has_final
= has_final
|| has_final2
;
12677 /* Return early if not finalizable. */
12681 *finalizable
= false;
12685 /* Walk over the list of finalizer-procedures, check them, and if any one
12686 does not fit in with the standard's definition, print an error and remove
12687 it from the list. */
12688 prev_link
= &derived
->f2k_derived
->finalizers
;
12689 for (list
= derived
->f2k_derived
->finalizers
; list
; list
= *prev_link
)
12691 gfc_formal_arglist
*dummy_args
;
12696 /* Skip this finalizer if we already resolved it. */
12697 if (list
->proc_tree
)
12699 if (list
->proc_tree
->n
.sym
->formal
->sym
->as
== NULL
12700 || list
->proc_tree
->n
.sym
->formal
->sym
->as
->rank
== 0)
12701 seen_scalar
= true;
12702 prev_link
= &(list
->next
);
12706 /* Check this exists and is a SUBROUTINE. */
12707 if (!list
->proc_sym
->attr
.subroutine
)
12709 gfc_error ("FINAL procedure %qs at %L is not a SUBROUTINE",
12710 list
->proc_sym
->name
, &list
->where
);
12714 /* We should have exactly one argument. */
12715 dummy_args
= gfc_sym_get_dummy_args (list
->proc_sym
);
12716 if (!dummy_args
|| dummy_args
->next
)
12718 gfc_error ("FINAL procedure at %L must have exactly one argument",
12722 arg
= dummy_args
->sym
;
12724 /* This argument must be of our type. */
12725 if (arg
->ts
.type
!= BT_DERIVED
|| arg
->ts
.u
.derived
!= derived
)
12727 gfc_error ("Argument of FINAL procedure at %L must be of type %qs",
12728 &arg
->declared_at
, derived
->name
);
12732 /* It must neither be a pointer nor allocatable nor optional. */
12733 if (arg
->attr
.pointer
)
12735 gfc_error ("Argument of FINAL procedure at %L must not be a POINTER",
12736 &arg
->declared_at
);
12739 if (arg
->attr
.allocatable
)
12741 gfc_error ("Argument of FINAL procedure at %L must not be"
12742 " ALLOCATABLE", &arg
->declared_at
);
12745 if (arg
->attr
.optional
)
12747 gfc_error ("Argument of FINAL procedure at %L must not be OPTIONAL",
12748 &arg
->declared_at
);
12752 /* It must not be INTENT(OUT). */
12753 if (arg
->attr
.intent
== INTENT_OUT
)
12755 gfc_error ("Argument of FINAL procedure at %L must not be"
12756 " INTENT(OUT)", &arg
->declared_at
);
12760 /* Warn if the procedure is non-scalar and not assumed shape. */
12761 if (warn_surprising
&& arg
->as
&& arg
->as
->rank
!= 0
12762 && arg
->as
->type
!= AS_ASSUMED_SHAPE
)
12763 gfc_warning (OPT_Wsurprising
,
12764 "Non-scalar FINAL procedure at %L should have assumed"
12765 " shape argument", &arg
->declared_at
);
12767 /* Check that it does not match in kind and rank with a FINAL procedure
12768 defined earlier. To really loop over the *earlier* declarations,
12769 we need to walk the tail of the list as new ones were pushed at the
12771 /* TODO: Handle kind parameters once they are implemented. */
12772 my_rank
= (arg
->as
? arg
->as
->rank
: 0);
12773 for (i
= list
->next
; i
; i
= i
->next
)
12775 gfc_formal_arglist
*dummy_args
;
12777 /* Argument list might be empty; that is an error signalled earlier,
12778 but we nevertheless continued resolving. */
12779 dummy_args
= gfc_sym_get_dummy_args (i
->proc_sym
);
12782 gfc_symbol
* i_arg
= dummy_args
->sym
;
12783 const int i_rank
= (i_arg
->as
? i_arg
->as
->rank
: 0);
12784 if (i_rank
== my_rank
)
12786 gfc_error ("FINAL procedure %qs declared at %L has the same"
12787 " rank (%d) as %qs",
12788 list
->proc_sym
->name
, &list
->where
, my_rank
,
12789 i
->proc_sym
->name
);
12795 /* Is this the/a scalar finalizer procedure? */
12797 seen_scalar
= true;
12799 /* Find the symtree for this procedure. */
12800 gcc_assert (!list
->proc_tree
);
12801 list
->proc_tree
= gfc_find_sym_in_symtree (list
->proc_sym
);
12803 prev_link
= &list
->next
;
12806 /* Remove wrong nodes immediately from the list so we don't risk any
12807 troubles in the future when they might fail later expectations. */
12810 *prev_link
= list
->next
;
12811 gfc_free_finalizer (i
);
12815 if (result
== false)
12818 /* Warn if we haven't seen a scalar finalizer procedure (but we know there
12819 were nodes in the list, must have been for arrays. It is surely a good
12820 idea to have a scalar version there if there's something to finalize. */
12821 if (warn_surprising
&& derived
->f2k_derived
->finalizers
&& !seen_scalar
)
12822 gfc_warning (OPT_Wsurprising
,
12823 "Only array FINAL procedures declared for derived type %qs"
12824 " defined at %L, suggest also scalar one",
12825 derived
->name
, &derived
->declared_at
);
12827 vtab
= gfc_find_derived_vtab (derived
);
12828 c
= vtab
->ts
.u
.derived
->components
->next
->next
->next
->next
->next
;
12829 gfc_set_sym_referenced (c
->initializer
->symtree
->n
.sym
);
12832 *finalizable
= true;
12838 /* Check if two GENERIC targets are ambiguous and emit an error is they are. */
12841 check_generic_tbp_ambiguity (gfc_tbp_generic
* t1
, gfc_tbp_generic
* t2
,
12842 const char* generic_name
, locus where
)
12844 gfc_symbol
*sym1
, *sym2
;
12845 const char *pass1
, *pass2
;
12846 gfc_formal_arglist
*dummy_args
;
12848 gcc_assert (t1
->specific
&& t2
->specific
);
12849 gcc_assert (!t1
->specific
->is_generic
);
12850 gcc_assert (!t2
->specific
->is_generic
);
12851 gcc_assert (t1
->is_operator
== t2
->is_operator
);
12853 sym1
= t1
->specific
->u
.specific
->n
.sym
;
12854 sym2
= t2
->specific
->u
.specific
->n
.sym
;
12859 /* Both must be SUBROUTINEs or both must be FUNCTIONs. */
12860 if (sym1
->attr
.subroutine
!= sym2
->attr
.subroutine
12861 || sym1
->attr
.function
!= sym2
->attr
.function
)
12863 gfc_error ("%qs and %qs can't be mixed FUNCTION/SUBROUTINE for"
12864 " GENERIC %qs at %L",
12865 sym1
->name
, sym2
->name
, generic_name
, &where
);
12869 /* Determine PASS arguments. */
12870 if (t1
->specific
->nopass
)
12872 else if (t1
->specific
->pass_arg
)
12873 pass1
= t1
->specific
->pass_arg
;
12876 dummy_args
= gfc_sym_get_dummy_args (t1
->specific
->u
.specific
->n
.sym
);
12878 pass1
= dummy_args
->sym
->name
;
12882 if (t2
->specific
->nopass
)
12884 else if (t2
->specific
->pass_arg
)
12885 pass2
= t2
->specific
->pass_arg
;
12888 dummy_args
= gfc_sym_get_dummy_args (t2
->specific
->u
.specific
->n
.sym
);
12890 pass2
= dummy_args
->sym
->name
;
12895 /* Compare the interfaces. */
12896 if (gfc_compare_interfaces (sym1
, sym2
, sym2
->name
, !t1
->is_operator
, 0,
12897 NULL
, 0, pass1
, pass2
))
12899 gfc_error ("%qs and %qs for GENERIC %qs at %L are ambiguous",
12900 sym1
->name
, sym2
->name
, generic_name
, &where
);
12908 /* Worker function for resolving a generic procedure binding; this is used to
12909 resolve GENERIC as well as user and intrinsic OPERATOR typebound procedures.
12911 The difference between those cases is finding possible inherited bindings
12912 that are overridden, as one has to look for them in tb_sym_root,
12913 tb_uop_root or tb_op, respectively. Thus the caller must already find
12914 the super-type and set p->overridden correctly. */
12917 resolve_tb_generic_targets (gfc_symbol
* super_type
,
12918 gfc_typebound_proc
* p
, const char* name
)
12920 gfc_tbp_generic
* target
;
12921 gfc_symtree
* first_target
;
12922 gfc_symtree
* inherited
;
12924 gcc_assert (p
&& p
->is_generic
);
12926 /* Try to find the specific bindings for the symtrees in our target-list. */
12927 gcc_assert (p
->u
.generic
);
12928 for (target
= p
->u
.generic
; target
; target
= target
->next
)
12929 if (!target
->specific
)
12931 gfc_typebound_proc
* overridden_tbp
;
12932 gfc_tbp_generic
* g
;
12933 const char* target_name
;
12935 target_name
= target
->specific_st
->name
;
12937 /* Defined for this type directly. */
12938 if (target
->specific_st
->n
.tb
&& !target
->specific_st
->n
.tb
->error
)
12940 target
->specific
= target
->specific_st
->n
.tb
;
12941 goto specific_found
;
12944 /* Look for an inherited specific binding. */
12947 inherited
= gfc_find_typebound_proc (super_type
, NULL
, target_name
,
12952 gcc_assert (inherited
->n
.tb
);
12953 target
->specific
= inherited
->n
.tb
;
12954 goto specific_found
;
12958 gfc_error ("Undefined specific binding %qs as target of GENERIC %qs"
12959 " at %L", target_name
, name
, &p
->where
);
12962 /* Once we've found the specific binding, check it is not ambiguous with
12963 other specifics already found or inherited for the same GENERIC. */
12965 gcc_assert (target
->specific
);
12967 /* This must really be a specific binding! */
12968 if (target
->specific
->is_generic
)
12970 gfc_error ("GENERIC %qs at %L must target a specific binding,"
12971 " %qs is GENERIC, too", name
, &p
->where
, target_name
);
12975 /* Check those already resolved on this type directly. */
12976 for (g
= p
->u
.generic
; g
; g
= g
->next
)
12977 if (g
!= target
&& g
->specific
12978 && !check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
12981 /* Check for ambiguity with inherited specific targets. */
12982 for (overridden_tbp
= p
->overridden
; overridden_tbp
;
12983 overridden_tbp
= overridden_tbp
->overridden
)
12984 if (overridden_tbp
->is_generic
)
12986 for (g
= overridden_tbp
->u
.generic
; g
; g
= g
->next
)
12988 gcc_assert (g
->specific
);
12989 if (!check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
12995 /* If we attempt to "overwrite" a specific binding, this is an error. */
12996 if (p
->overridden
&& !p
->overridden
->is_generic
)
12998 gfc_error ("GENERIC %qs at %L can't overwrite specific binding with"
12999 " the same name", name
, &p
->where
);
13003 /* Take the SUBROUTINE/FUNCTION attributes of the first specific target, as
13004 all must have the same attributes here. */
13005 first_target
= p
->u
.generic
->specific
->u
.specific
;
13006 gcc_assert (first_target
);
13007 p
->subroutine
= first_target
->n
.sym
->attr
.subroutine
;
13008 p
->function
= first_target
->n
.sym
->attr
.function
;
13014 /* Resolve a GENERIC procedure binding for a derived type. */
13017 resolve_typebound_generic (gfc_symbol
* derived
, gfc_symtree
* st
)
13019 gfc_symbol
* super_type
;
13021 /* Find the overridden binding if any. */
13022 st
->n
.tb
->overridden
= NULL
;
13023 super_type
= gfc_get_derived_super_type (derived
);
13026 gfc_symtree
* overridden
;
13027 overridden
= gfc_find_typebound_proc (super_type
, NULL
, st
->name
,
13030 if (overridden
&& overridden
->n
.tb
)
13031 st
->n
.tb
->overridden
= overridden
->n
.tb
;
13034 /* Resolve using worker function. */
13035 return resolve_tb_generic_targets (super_type
, st
->n
.tb
, st
->name
);
13039 /* Retrieve the target-procedure of an operator binding and do some checks in
13040 common for intrinsic and user-defined type-bound operators. */
13043 get_checked_tb_operator_target (gfc_tbp_generic
* target
, locus where
)
13045 gfc_symbol
* target_proc
;
13047 gcc_assert (target
->specific
&& !target
->specific
->is_generic
);
13048 target_proc
= target
->specific
->u
.specific
->n
.sym
;
13049 gcc_assert (target_proc
);
13051 /* F08:C468. All operator bindings must have a passed-object dummy argument. */
13052 if (target
->specific
->nopass
)
13054 gfc_error ("Type-bound operator at %L can't be NOPASS", &where
);
13058 return target_proc
;
13062 /* Resolve a type-bound intrinsic operator. */
13065 resolve_typebound_intrinsic_op (gfc_symbol
* derived
, gfc_intrinsic_op op
,
13066 gfc_typebound_proc
* p
)
13068 gfc_symbol
* super_type
;
13069 gfc_tbp_generic
* target
;
13071 /* If there's already an error here, do nothing (but don't fail again). */
13075 /* Operators should always be GENERIC bindings. */
13076 gcc_assert (p
->is_generic
);
13078 /* Look for an overridden binding. */
13079 super_type
= gfc_get_derived_super_type (derived
);
13080 if (super_type
&& super_type
->f2k_derived
)
13081 p
->overridden
= gfc_find_typebound_intrinsic_op (super_type
, NULL
,
13084 p
->overridden
= NULL
;
13086 /* Resolve general GENERIC properties using worker function. */
13087 if (!resolve_tb_generic_targets (super_type
, p
, gfc_op2string(op
)))
13090 /* Check the targets to be procedures of correct interface. */
13091 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13093 gfc_symbol
* target_proc
;
13095 target_proc
= get_checked_tb_operator_target (target
, p
->where
);
13099 if (!gfc_check_operator_interface (target_proc
, op
, p
->where
))
13102 /* Add target to non-typebound operator list. */
13103 if (!target
->specific
->deferred
&& !derived
->attr
.use_assoc
13104 && p
->access
!= ACCESS_PRIVATE
&& derived
->ns
== gfc_current_ns
)
13106 gfc_interface
*head
, *intr
;
13108 /* Preempt 'gfc_check_new_interface' for submodules, where the
13109 mechanism for handling module procedures winds up resolving
13110 operator interfaces twice and would otherwise cause an error. */
13111 for (intr
= derived
->ns
->op
[op
]; intr
; intr
= intr
->next
)
13112 if (intr
->sym
== target_proc
13113 && target_proc
->attr
.used_in_submodule
)
13116 if (!gfc_check_new_interface (derived
->ns
->op
[op
],
13117 target_proc
, p
->where
))
13119 head
= derived
->ns
->op
[op
];
13120 intr
= gfc_get_interface ();
13121 intr
->sym
= target_proc
;
13122 intr
->where
= p
->where
;
13124 derived
->ns
->op
[op
] = intr
;
13136 /* Resolve a type-bound user operator (tree-walker callback). */
13138 static gfc_symbol
* resolve_bindings_derived
;
13139 static bool resolve_bindings_result
;
13141 static bool check_uop_procedure (gfc_symbol
* sym
, locus where
);
13144 resolve_typebound_user_op (gfc_symtree
* stree
)
13146 gfc_symbol
* super_type
;
13147 gfc_tbp_generic
* target
;
13149 gcc_assert (stree
&& stree
->n
.tb
);
13151 if (stree
->n
.tb
->error
)
13154 /* Operators should always be GENERIC bindings. */
13155 gcc_assert (stree
->n
.tb
->is_generic
);
13157 /* Find overridden procedure, if any. */
13158 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13159 if (super_type
&& super_type
->f2k_derived
)
13161 gfc_symtree
* overridden
;
13162 overridden
= gfc_find_typebound_user_op (super_type
, NULL
,
13163 stree
->name
, true, NULL
);
13165 if (overridden
&& overridden
->n
.tb
)
13166 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13169 stree
->n
.tb
->overridden
= NULL
;
13171 /* Resolve basically using worker function. */
13172 if (!resolve_tb_generic_targets (super_type
, stree
->n
.tb
, stree
->name
))
13175 /* Check the targets to be functions of correct interface. */
13176 for (target
= stree
->n
.tb
->u
.generic
; target
; target
= target
->next
)
13178 gfc_symbol
* target_proc
;
13180 target_proc
= get_checked_tb_operator_target (target
, stree
->n
.tb
->where
);
13184 if (!check_uop_procedure (target_proc
, stree
->n
.tb
->where
))
13191 resolve_bindings_result
= false;
13192 stree
->n
.tb
->error
= 1;
13196 /* Resolve the type-bound procedures for a derived type. */
13199 resolve_typebound_procedure (gfc_symtree
* stree
)
13203 gfc_symbol
* me_arg
;
13204 gfc_symbol
* super_type
;
13205 gfc_component
* comp
;
13207 gcc_assert (stree
);
13209 /* Undefined specific symbol from GENERIC target definition. */
13213 if (stree
->n
.tb
->error
)
13216 /* If this is a GENERIC binding, use that routine. */
13217 if (stree
->n
.tb
->is_generic
)
13219 if (!resolve_typebound_generic (resolve_bindings_derived
, stree
))
13224 /* Get the target-procedure to check it. */
13225 gcc_assert (!stree
->n
.tb
->is_generic
);
13226 gcc_assert (stree
->n
.tb
->u
.specific
);
13227 proc
= stree
->n
.tb
->u
.specific
->n
.sym
;
13228 where
= stree
->n
.tb
->where
;
13230 /* Default access should already be resolved from the parser. */
13231 gcc_assert (stree
->n
.tb
->access
!= ACCESS_UNKNOWN
);
13233 if (stree
->n
.tb
->deferred
)
13235 if (!check_proc_interface (proc
, &where
))
13240 /* Check for F08:C465. */
13241 if ((!proc
->attr
.subroutine
&& !proc
->attr
.function
)
13242 || (proc
->attr
.proc
!= PROC_MODULE
13243 && proc
->attr
.if_source
!= IFSRC_IFBODY
)
13244 || proc
->attr
.abstract
)
13246 gfc_error ("%qs must be a module procedure or an external procedure with"
13247 " an explicit interface at %L", proc
->name
, &where
);
13252 stree
->n
.tb
->subroutine
= proc
->attr
.subroutine
;
13253 stree
->n
.tb
->function
= proc
->attr
.function
;
13255 /* Find the super-type of the current derived type. We could do this once and
13256 store in a global if speed is needed, but as long as not I believe this is
13257 more readable and clearer. */
13258 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13260 /* If PASS, resolve and check arguments if not already resolved / loaded
13261 from a .mod file. */
13262 if (!stree
->n
.tb
->nopass
&& stree
->n
.tb
->pass_arg_num
== 0)
13264 gfc_formal_arglist
*dummy_args
;
13266 dummy_args
= gfc_sym_get_dummy_args (proc
);
13267 if (stree
->n
.tb
->pass_arg
)
13269 gfc_formal_arglist
*i
;
13271 /* If an explicit passing argument name is given, walk the arg-list
13272 and look for it. */
13275 stree
->n
.tb
->pass_arg_num
= 1;
13276 for (i
= dummy_args
; i
; i
= i
->next
)
13278 if (!strcmp (i
->sym
->name
, stree
->n
.tb
->pass_arg
))
13283 ++stree
->n
.tb
->pass_arg_num
;
13288 gfc_error ("Procedure %qs with PASS(%s) at %L has no"
13290 proc
->name
, stree
->n
.tb
->pass_arg
, &where
,
13291 stree
->n
.tb
->pass_arg
);
13297 /* Otherwise, take the first one; there should in fact be at least
13299 stree
->n
.tb
->pass_arg_num
= 1;
13302 gfc_error ("Procedure %qs with PASS at %L must have at"
13303 " least one argument", proc
->name
, &where
);
13306 me_arg
= dummy_args
->sym
;
13309 /* Now check that the argument-type matches and the passed-object
13310 dummy argument is generally fine. */
13312 gcc_assert (me_arg
);
13314 if (me_arg
->ts
.type
!= BT_CLASS
)
13316 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13317 " at %L", proc
->name
, &where
);
13321 if (CLASS_DATA (me_arg
)->ts
.u
.derived
13322 != resolve_bindings_derived
)
13324 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13325 " the derived-type %qs", me_arg
->name
, proc
->name
,
13326 me_arg
->name
, &where
, resolve_bindings_derived
->name
);
13330 gcc_assert (me_arg
->ts
.type
== BT_CLASS
);
13331 if (CLASS_DATA (me_arg
)->as
&& CLASS_DATA (me_arg
)->as
->rank
!= 0)
13333 gfc_error ("Passed-object dummy argument of %qs at %L must be"
13334 " scalar", proc
->name
, &where
);
13337 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13339 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13340 " be ALLOCATABLE", proc
->name
, &where
);
13343 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13345 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13346 " be POINTER", proc
->name
, &where
);
13351 /* If we are extending some type, check that we don't override a procedure
13352 flagged NON_OVERRIDABLE. */
13353 stree
->n
.tb
->overridden
= NULL
;
13356 gfc_symtree
* overridden
;
13357 overridden
= gfc_find_typebound_proc (super_type
, NULL
,
13358 stree
->name
, true, NULL
);
13362 if (overridden
->n
.tb
)
13363 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13365 if (!gfc_check_typebound_override (stree
, overridden
))
13370 /* See if there's a name collision with a component directly in this type. */
13371 for (comp
= resolve_bindings_derived
->components
; comp
; comp
= comp
->next
)
13372 if (!strcmp (comp
->name
, stree
->name
))
13374 gfc_error ("Procedure %qs at %L has the same name as a component of"
13376 stree
->name
, &where
, resolve_bindings_derived
->name
);
13380 /* Try to find a name collision with an inherited component. */
13381 if (super_type
&& gfc_find_component (super_type
, stree
->name
, true, true,
13384 gfc_error ("Procedure %qs at %L has the same name as an inherited"
13385 " component of %qs",
13386 stree
->name
, &where
, resolve_bindings_derived
->name
);
13390 stree
->n
.tb
->error
= 0;
13394 resolve_bindings_result
= false;
13395 stree
->n
.tb
->error
= 1;
13400 resolve_typebound_procedures (gfc_symbol
* derived
)
13403 gfc_symbol
* super_type
;
13405 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->tb_sym_root
)
13408 super_type
= gfc_get_derived_super_type (derived
);
13410 resolve_symbol (super_type
);
13412 resolve_bindings_derived
= derived
;
13413 resolve_bindings_result
= true;
13415 if (derived
->f2k_derived
->tb_sym_root
)
13416 gfc_traverse_symtree (derived
->f2k_derived
->tb_sym_root
,
13417 &resolve_typebound_procedure
);
13419 if (derived
->f2k_derived
->tb_uop_root
)
13420 gfc_traverse_symtree (derived
->f2k_derived
->tb_uop_root
,
13421 &resolve_typebound_user_op
);
13423 for (op
= 0; op
!= GFC_INTRINSIC_OPS
; ++op
)
13425 gfc_typebound_proc
* p
= derived
->f2k_derived
->tb_op
[op
];
13426 if (p
&& !resolve_typebound_intrinsic_op (derived
,
13427 (gfc_intrinsic_op
)op
, p
))
13428 resolve_bindings_result
= false;
13431 return resolve_bindings_result
;
13435 /* Add a derived type to the dt_list. The dt_list is used in trans-types.c
13436 to give all identical derived types the same backend_decl. */
13438 add_dt_to_dt_list (gfc_symbol
*derived
)
13440 gfc_dt_list
*dt_list
;
13442 for (dt_list
= gfc_derived_types
; dt_list
; dt_list
= dt_list
->next
)
13443 if (derived
== dt_list
->derived
)
13446 dt_list
= gfc_get_dt_list ();
13447 dt_list
->next
= gfc_derived_types
;
13448 dt_list
->derived
= derived
;
13449 gfc_derived_types
= dt_list
;
13453 /* Ensure that a derived-type is really not abstract, meaning that every
13454 inherited DEFERRED binding is overridden by a non-DEFERRED one. */
13457 ensure_not_abstract_walker (gfc_symbol
* sub
, gfc_symtree
* st
)
13462 if (!ensure_not_abstract_walker (sub
, st
->left
))
13464 if (!ensure_not_abstract_walker (sub
, st
->right
))
13467 if (st
->n
.tb
&& st
->n
.tb
->deferred
)
13469 gfc_symtree
* overriding
;
13470 overriding
= gfc_find_typebound_proc (sub
, NULL
, st
->name
, true, NULL
);
13473 gcc_assert (overriding
->n
.tb
);
13474 if (overriding
->n
.tb
->deferred
)
13476 gfc_error ("Derived-type %qs declared at %L must be ABSTRACT because"
13477 " %qs is DEFERRED and not overridden",
13478 sub
->name
, &sub
->declared_at
, st
->name
);
13487 ensure_not_abstract (gfc_symbol
* sub
, gfc_symbol
* ancestor
)
13489 /* The algorithm used here is to recursively travel up the ancestry of sub
13490 and for each ancestor-type, check all bindings. If any of them is
13491 DEFERRED, look it up starting from sub and see if the found (overriding)
13492 binding is not DEFERRED.
13493 This is not the most efficient way to do this, but it should be ok and is
13494 clearer than something sophisticated. */
13496 gcc_assert (ancestor
&& !sub
->attr
.abstract
);
13498 if (!ancestor
->attr
.abstract
)
13501 /* Walk bindings of this ancestor. */
13502 if (ancestor
->f2k_derived
)
13505 t
= ensure_not_abstract_walker (sub
, ancestor
->f2k_derived
->tb_sym_root
);
13510 /* Find next ancestor type and recurse on it. */
13511 ancestor
= gfc_get_derived_super_type (ancestor
);
13513 return ensure_not_abstract (sub
, ancestor
);
13519 /* This check for typebound defined assignments is done recursively
13520 since the order in which derived types are resolved is not always in
13521 order of the declarations. */
13524 check_defined_assignments (gfc_symbol
*derived
)
13528 for (c
= derived
->components
; c
; c
= c
->next
)
13530 if (!gfc_bt_struct (c
->ts
.type
)
13532 || c
->attr
.allocatable
13533 || c
->attr
.proc_pointer_comp
13534 || c
->attr
.class_pointer
13535 || c
->attr
.proc_pointer
)
13538 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
13539 || (c
->ts
.u
.derived
->f2k_derived
13540 && c
->ts
.u
.derived
->f2k_derived
->tb_op
[INTRINSIC_ASSIGN
]))
13542 derived
->attr
.defined_assign_comp
= 1;
13546 check_defined_assignments (c
->ts
.u
.derived
);
13547 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
13549 derived
->attr
.defined_assign_comp
= 1;
13556 /* Resolve a single component of a derived type or structure. */
13559 resolve_component (gfc_component
*c
, gfc_symbol
*sym
)
13561 gfc_symbol
*super_type
;
13563 if (c
->attr
.artificial
)
13566 /* Do not allow vtype components to be resolved in nameless namespaces
13567 such as block data because the procedure pointers will cause ICEs
13568 and vtables are not needed in these contexts. */
13569 if (sym
->attr
.vtype
&& sym
->attr
.use_assoc
13570 && sym
->ns
->proc_name
== NULL
)
13574 if ((!sym
->attr
.is_class
|| c
!= sym
->components
)
13575 && c
->attr
.codimension
13576 && (!c
->attr
.allocatable
|| (c
->as
&& c
->as
->type
!= AS_DEFERRED
)))
13578 gfc_error ("Coarray component %qs at %L must be allocatable with "
13579 "deferred shape", c
->name
, &c
->loc
);
13584 if (c
->attr
.codimension
&& c
->ts
.type
== BT_DERIVED
13585 && c
->ts
.u
.derived
->ts
.is_iso_c
)
13587 gfc_error ("Component %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
13588 "shall not be a coarray", c
->name
, &c
->loc
);
13593 if (gfc_bt_struct (c
->ts
.type
) && c
->ts
.u
.derived
->attr
.coarray_comp
13594 && (c
->attr
.codimension
|| c
->attr
.pointer
|| c
->attr
.dimension
13595 || c
->attr
.allocatable
))
13597 gfc_error ("Component %qs at %L with coarray component "
13598 "shall be a nonpointer, nonallocatable scalar",
13604 if (c
->attr
.contiguous
&& (!c
->attr
.dimension
|| !c
->attr
.pointer
))
13606 gfc_error ("Component %qs at %L has the CONTIGUOUS attribute but "
13607 "is not an array pointer", c
->name
, &c
->loc
);
13611 /* F2003, 15.2.1 - length has to be one. */
13612 if (sym
->attr
.is_bind_c
&& c
->ts
.type
== BT_CHARACTER
13613 && (c
->ts
.u
.cl
== NULL
|| c
->ts
.u
.cl
->length
== NULL
13614 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
)
13615 || mpz_cmp_si (c
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
13617 gfc_error ("Component %qs of BIND(C) type at %L must have length one",
13622 if (c
->attr
.proc_pointer
&& c
->ts
.interface
)
13624 gfc_symbol
*ifc
= c
->ts
.interface
;
13626 if (!sym
->attr
.vtype
&& !check_proc_interface (ifc
, &c
->loc
))
13632 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
13634 /* Resolve interface and copy attributes. */
13635 if (ifc
->formal
&& !ifc
->formal_ns
)
13636 resolve_symbol (ifc
);
13637 if (ifc
->attr
.intrinsic
)
13638 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
13642 c
->ts
= ifc
->result
->ts
;
13643 c
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
13644 c
->attr
.pointer
= ifc
->result
->attr
.pointer
;
13645 c
->attr
.dimension
= ifc
->result
->attr
.dimension
;
13646 c
->as
= gfc_copy_array_spec (ifc
->result
->as
);
13647 c
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
13652 c
->attr
.allocatable
= ifc
->attr
.allocatable
;
13653 c
->attr
.pointer
= ifc
->attr
.pointer
;
13654 c
->attr
.dimension
= ifc
->attr
.dimension
;
13655 c
->as
= gfc_copy_array_spec (ifc
->as
);
13656 c
->attr
.class_ok
= ifc
->attr
.class_ok
;
13658 c
->ts
.interface
= ifc
;
13659 c
->attr
.function
= ifc
->attr
.function
;
13660 c
->attr
.subroutine
= ifc
->attr
.subroutine
;
13662 c
->attr
.pure
= ifc
->attr
.pure
;
13663 c
->attr
.elemental
= ifc
->attr
.elemental
;
13664 c
->attr
.recursive
= ifc
->attr
.recursive
;
13665 c
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
13666 c
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
13667 /* Copy char length. */
13668 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
13670 gfc_charlen
*cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
13671 if (cl
->length
&& !cl
->resolved
13672 && !gfc_resolve_expr (cl
->length
))
13681 else if (c
->attr
.proc_pointer
&& c
->ts
.type
== BT_UNKNOWN
)
13683 /* Since PPCs are not implicitly typed, a PPC without an explicit
13684 interface must be a subroutine. */
13685 gfc_add_subroutine (&c
->attr
, c
->name
, &c
->loc
);
13688 /* Procedure pointer components: Check PASS arg. */
13689 if (c
->attr
.proc_pointer
&& !c
->tb
->nopass
&& c
->tb
->pass_arg_num
== 0
13690 && !sym
->attr
.vtype
)
13692 gfc_symbol
* me_arg
;
13694 if (c
->tb
->pass_arg
)
13696 gfc_formal_arglist
* i
;
13698 /* If an explicit passing argument name is given, walk the arg-list
13699 and look for it. */
13702 c
->tb
->pass_arg_num
= 1;
13703 for (i
= c
->ts
.interface
->formal
; i
; i
= i
->next
)
13705 if (!strcmp (i
->sym
->name
, c
->tb
->pass_arg
))
13710 c
->tb
->pass_arg_num
++;
13715 gfc_error ("Procedure pointer component %qs with PASS(%s) "
13716 "at %L has no argument %qs", c
->name
,
13717 c
->tb
->pass_arg
, &c
->loc
, c
->tb
->pass_arg
);
13724 /* Otherwise, take the first one; there should in fact be at least
13726 c
->tb
->pass_arg_num
= 1;
13727 if (!c
->ts
.interface
->formal
)
13729 gfc_error ("Procedure pointer component %qs with PASS at %L "
13730 "must have at least one argument",
13735 me_arg
= c
->ts
.interface
->formal
->sym
;
13738 /* Now check that the argument-type matches. */
13739 gcc_assert (me_arg
);
13740 if ((me_arg
->ts
.type
!= BT_DERIVED
&& me_arg
->ts
.type
!= BT_CLASS
)
13741 || (me_arg
->ts
.type
== BT_DERIVED
&& me_arg
->ts
.u
.derived
!= sym
)
13742 || (me_arg
->ts
.type
== BT_CLASS
13743 && CLASS_DATA (me_arg
)->ts
.u
.derived
!= sym
))
13745 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13746 " the derived type %qs", me_arg
->name
, c
->name
,
13747 me_arg
->name
, &c
->loc
, sym
->name
);
13752 /* Check for F03:C453. */
13753 if (CLASS_DATA (me_arg
)->attr
.dimension
)
13755 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13756 "must be scalar", me_arg
->name
, c
->name
, me_arg
->name
,
13762 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13764 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13765 "may not have the POINTER attribute", me_arg
->name
,
13766 c
->name
, me_arg
->name
, &c
->loc
);
13771 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13773 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13774 "may not be ALLOCATABLE", me_arg
->name
, c
->name
,
13775 me_arg
->name
, &c
->loc
);
13780 if (gfc_type_is_extensible (sym
) && me_arg
->ts
.type
!= BT_CLASS
)
13782 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13783 " at %L", c
->name
, &c
->loc
);
13789 /* Check type-spec if this is not the parent-type component. */
13790 if (((sym
->attr
.is_class
13791 && (!sym
->components
->ts
.u
.derived
->attr
.extension
13792 || c
!= sym
->components
->ts
.u
.derived
->components
))
13793 || (!sym
->attr
.is_class
13794 && (!sym
->attr
.extension
|| c
!= sym
->components
)))
13795 && !sym
->attr
.vtype
13796 && !resolve_typespec_used (&c
->ts
, &c
->loc
, c
->name
))
13799 super_type
= gfc_get_derived_super_type (sym
);
13801 /* If this type is an extension, set the accessibility of the parent
13804 && ((sym
->attr
.is_class
13805 && c
== sym
->components
->ts
.u
.derived
->components
)
13806 || (!sym
->attr
.is_class
&& c
== sym
->components
))
13807 && strcmp (super_type
->name
, c
->name
) == 0)
13808 c
->attr
.access
= super_type
->attr
.access
;
13810 /* If this type is an extension, see if this component has the same name
13811 as an inherited type-bound procedure. */
13812 if (super_type
&& !sym
->attr
.is_class
13813 && gfc_find_typebound_proc (super_type
, NULL
, c
->name
, true, NULL
))
13815 gfc_error ("Component %qs of %qs at %L has the same name as an"
13816 " inherited type-bound procedure",
13817 c
->name
, sym
->name
, &c
->loc
);
13821 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.proc_pointer
13822 && !c
->ts
.deferred
)
13824 if (c
->ts
.u
.cl
->length
== NULL
13825 || (!resolve_charlen(c
->ts
.u
.cl
))
13826 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
))
13828 gfc_error ("Character length of component %qs needs to "
13829 "be a constant specification expression at %L",
13831 c
->ts
.u
.cl
->length
? &c
->ts
.u
.cl
->length
->where
: &c
->loc
);
13836 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.deferred
13837 && !c
->attr
.pointer
&& !c
->attr
.allocatable
)
13839 gfc_error ("Character component %qs of %qs at %L with deferred "
13840 "length must be a POINTER or ALLOCATABLE",
13841 c
->name
, sym
->name
, &c
->loc
);
13845 /* Add the hidden deferred length field. */
13846 if (c
->ts
.type
== BT_CHARACTER
13847 && (c
->ts
.deferred
|| c
->attr
.pdt_string
)
13848 && !c
->attr
.function
13849 && !sym
->attr
.is_class
)
13851 char name
[GFC_MAX_SYMBOL_LEN
+9];
13852 gfc_component
*strlen
;
13853 sprintf (name
, "_%s_length", c
->name
);
13854 strlen
= gfc_find_component (sym
, name
, true, true, NULL
);
13855 if (strlen
== NULL
)
13857 if (!gfc_add_component (sym
, name
, &strlen
))
13859 strlen
->ts
.type
= BT_INTEGER
;
13860 strlen
->ts
.kind
= gfc_charlen_int_kind
;
13861 strlen
->attr
.access
= ACCESS_PRIVATE
;
13862 strlen
->attr
.artificial
= 1;
13866 if (c
->ts
.type
== BT_DERIVED
13867 && sym
->component_access
!= ACCESS_PRIVATE
13868 && gfc_check_symbol_access (sym
)
13869 && !is_sym_host_assoc (c
->ts
.u
.derived
, sym
->ns
)
13870 && !c
->ts
.u
.derived
->attr
.use_assoc
13871 && !gfc_check_symbol_access (c
->ts
.u
.derived
)
13872 && !gfc_notify_std (GFC_STD_F2003
, "the component %qs is a "
13873 "PRIVATE type and cannot be a component of "
13874 "%qs, which is PUBLIC at %L", c
->name
,
13875 sym
->name
, &sym
->declared_at
))
13878 if ((sym
->attr
.sequence
|| sym
->attr
.is_bind_c
) && c
->ts
.type
== BT_CLASS
)
13880 gfc_error ("Polymorphic component %s at %L in SEQUENCE or BIND(C) "
13881 "type %s", c
->name
, &c
->loc
, sym
->name
);
13885 if (sym
->attr
.sequence
)
13887 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.sequence
== 0)
13889 gfc_error ("Component %s of SEQUENCE type declared at %L does "
13890 "not have the SEQUENCE attribute",
13891 c
->ts
.u
.derived
->name
, &sym
->declared_at
);
13896 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.generic
)
13897 c
->ts
.u
.derived
= gfc_find_dt_in_generic (c
->ts
.u
.derived
);
13898 else if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
13899 && CLASS_DATA (c
)->ts
.u
.derived
->attr
.generic
)
13900 CLASS_DATA (c
)->ts
.u
.derived
13901 = gfc_find_dt_in_generic (CLASS_DATA (c
)->ts
.u
.derived
);
13903 if (!sym
->attr
.is_class
&& c
->ts
.type
== BT_DERIVED
&& !sym
->attr
.vtype
13904 && c
->attr
.pointer
&& c
->ts
.u
.derived
->components
== NULL
13905 && !c
->ts
.u
.derived
->attr
.zero_comp
)
13907 gfc_error ("The pointer component %qs of %qs at %L is a type "
13908 "that has not been declared", c
->name
, sym
->name
,
13913 if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
13914 && CLASS_DATA (c
)->attr
.class_pointer
13915 && CLASS_DATA (c
)->ts
.u
.derived
->components
== NULL
13916 && !CLASS_DATA (c
)->ts
.u
.derived
->attr
.zero_comp
13917 && !UNLIMITED_POLY (c
))
13919 gfc_error ("The pointer component %qs of %qs at %L is a type "
13920 "that has not been declared", c
->name
, sym
->name
,
13925 /* If an allocatable component derived type is of the same type as
13926 the enclosing derived type, we need a vtable generating so that
13927 the __deallocate procedure is created. */
13928 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
13929 && c
->ts
.u
.derived
== sym
&& c
->attr
.allocatable
== 1)
13930 gfc_find_vtab (&c
->ts
);
13932 /* Ensure that all the derived type components are put on the
13933 derived type list; even in formal namespaces, where derived type
13934 pointer components might not have been declared. */
13935 if (c
->ts
.type
== BT_DERIVED
13937 && c
->ts
.u
.derived
->components
13939 && sym
!= c
->ts
.u
.derived
)
13940 add_dt_to_dt_list (c
->ts
.u
.derived
);
13942 if (!gfc_resolve_array_spec (c
->as
,
13943 !(c
->attr
.pointer
|| c
->attr
.proc_pointer
13944 || c
->attr
.allocatable
)))
13947 if (c
->initializer
&& !sym
->attr
.vtype
13948 && !c
->attr
.pdt_kind
&& !c
->attr
.pdt_len
13949 && !gfc_check_assign_symbol (sym
, c
, c
->initializer
))
13956 /* Be nice about the locus for a structure expression - show the locus of the
13957 first non-null sub-expression if we can. */
13960 cons_where (gfc_expr
*struct_expr
)
13962 gfc_constructor
*cons
;
13964 gcc_assert (struct_expr
&& struct_expr
->expr_type
== EXPR_STRUCTURE
);
13966 cons
= gfc_constructor_first (struct_expr
->value
.constructor
);
13967 for (; cons
; cons
= gfc_constructor_next (cons
))
13969 if (cons
->expr
&& cons
->expr
->expr_type
!= EXPR_NULL
)
13970 return &cons
->expr
->where
;
13973 return &struct_expr
->where
;
13976 /* Resolve the components of a structure type. Much less work than derived
13980 resolve_fl_struct (gfc_symbol
*sym
)
13983 gfc_expr
*init
= NULL
;
13986 /* Make sure UNIONs do not have overlapping initializers. */
13987 if (sym
->attr
.flavor
== FL_UNION
)
13989 for (c
= sym
->components
; c
; c
= c
->next
)
13991 if (init
&& c
->initializer
)
13993 gfc_error ("Conflicting initializers in union at %L and %L",
13994 cons_where (init
), cons_where (c
->initializer
));
13995 gfc_free_expr (c
->initializer
);
13996 c
->initializer
= NULL
;
13999 init
= c
->initializer
;
14004 for (c
= sym
->components
; c
; c
= c
->next
)
14005 if (!resolve_component (c
, sym
))
14011 if (sym
->components
)
14012 add_dt_to_dt_list (sym
);
14018 /* Resolve the components of a derived type. This does not have to wait until
14019 resolution stage, but can be done as soon as the dt declaration has been
14023 resolve_fl_derived0 (gfc_symbol
*sym
)
14025 gfc_symbol
* super_type
;
14027 gfc_formal_arglist
*f
;
14030 if (sym
->attr
.unlimited_polymorphic
)
14033 super_type
= gfc_get_derived_super_type (sym
);
14036 if (super_type
&& sym
->attr
.coarray_comp
&& !super_type
->attr
.coarray_comp
)
14038 gfc_error ("As extending type %qs at %L has a coarray component, "
14039 "parent type %qs shall also have one", sym
->name
,
14040 &sym
->declared_at
, super_type
->name
);
14044 /* Ensure the extended type gets resolved before we do. */
14045 if (super_type
&& !resolve_fl_derived0 (super_type
))
14048 /* An ABSTRACT type must be extensible. */
14049 if (sym
->attr
.abstract
&& !gfc_type_is_extensible (sym
))
14051 gfc_error ("Non-extensible derived-type %qs at %L must not be ABSTRACT",
14052 sym
->name
, &sym
->declared_at
);
14056 c
= (sym
->attr
.is_class
) ? sym
->components
->ts
.u
.derived
->components
14060 for ( ; c
!= NULL
; c
= c
->next
)
14061 if (!resolve_component (c
, sym
))
14067 /* Now add the caf token field, where needed. */
14068 if (flag_coarray
!= GFC_FCOARRAY_NONE
14069 && !sym
->attr
.is_class
&& !sym
->attr
.vtype
)
14071 for (c
= sym
->components
; c
; c
= c
->next
)
14072 if (!c
->attr
.dimension
&& !c
->attr
.codimension
14073 && (c
->attr
.allocatable
|| c
->attr
.pointer
))
14075 char name
[GFC_MAX_SYMBOL_LEN
+9];
14076 gfc_component
*token
;
14077 sprintf (name
, "_caf_%s", c
->name
);
14078 token
= gfc_find_component (sym
, name
, true, true, NULL
);
14081 if (!gfc_add_component (sym
, name
, &token
))
14083 token
->ts
.type
= BT_VOID
;
14084 token
->ts
.kind
= gfc_default_integer_kind
;
14085 token
->attr
.access
= ACCESS_PRIVATE
;
14086 token
->attr
.artificial
= 1;
14087 token
->attr
.caf_token
= 1;
14092 check_defined_assignments (sym
);
14094 if (!sym
->attr
.defined_assign_comp
&& super_type
)
14095 sym
->attr
.defined_assign_comp
14096 = super_type
->attr
.defined_assign_comp
;
14098 /* If this is a non-ABSTRACT type extending an ABSTRACT one, ensure that
14099 all DEFERRED bindings are overridden. */
14100 if (super_type
&& super_type
->attr
.abstract
&& !sym
->attr
.abstract
14101 && !sym
->attr
.is_class
14102 && !ensure_not_abstract (sym
, super_type
))
14105 /* Check that there is a component for every PDT parameter. */
14106 if (sym
->attr
.pdt_template
)
14108 for (f
= sym
->formal
; f
; f
= f
->next
)
14112 c
= gfc_find_component (sym
, f
->sym
->name
, true, true, NULL
);
14115 gfc_error ("Parameterized type %qs does not have a component "
14116 "corresponding to parameter %qs at %L", sym
->name
,
14117 f
->sym
->name
, &sym
->declared_at
);
14123 /* Add derived type to the derived type list. */
14124 add_dt_to_dt_list (sym
);
14130 /* The following procedure does the full resolution of a derived type,
14131 including resolution of all type-bound procedures (if present). In contrast
14132 to 'resolve_fl_derived0' this can only be done after the module has been
14133 parsed completely. */
14136 resolve_fl_derived (gfc_symbol
*sym
)
14138 gfc_symbol
*gen_dt
= NULL
;
14140 if (sym
->attr
.unlimited_polymorphic
)
14143 if (!sym
->attr
.is_class
)
14144 gfc_find_symbol (sym
->name
, sym
->ns
, 0, &gen_dt
);
14145 if (gen_dt
&& gen_dt
->generic
&& gen_dt
->generic
->next
14146 && (!gen_dt
->generic
->sym
->attr
.use_assoc
14147 || gen_dt
->generic
->sym
->module
!= gen_dt
->generic
->next
->sym
->module
)
14148 && !gfc_notify_std (GFC_STD_F2003
, "Generic name %qs of function "
14149 "%qs at %L being the same name as derived "
14150 "type at %L", sym
->name
,
14151 gen_dt
->generic
->sym
== sym
14152 ? gen_dt
->generic
->next
->sym
->name
14153 : gen_dt
->generic
->sym
->name
,
14154 gen_dt
->generic
->sym
== sym
14155 ? &gen_dt
->generic
->next
->sym
->declared_at
14156 : &gen_dt
->generic
->sym
->declared_at
,
14157 &sym
->declared_at
))
14160 /* Resolve the finalizer procedures. */
14161 if (!gfc_resolve_finalizers (sym
, NULL
))
14164 if (sym
->attr
.is_class
&& sym
->ts
.u
.derived
== NULL
)
14166 /* Fix up incomplete CLASS symbols. */
14167 gfc_component
*data
= gfc_find_component (sym
, "_data", true, true, NULL
);
14168 gfc_component
*vptr
= gfc_find_component (sym
, "_vptr", true, true, NULL
);
14170 /* Nothing more to do for unlimited polymorphic entities. */
14171 if (data
->ts
.u
.derived
->attr
.unlimited_polymorphic
)
14173 else if (vptr
->ts
.u
.derived
== NULL
)
14175 gfc_symbol
*vtab
= gfc_find_derived_vtab (data
->ts
.u
.derived
);
14177 vptr
->ts
.u
.derived
= vtab
->ts
.u
.derived
;
14178 if (!resolve_fl_derived0 (vptr
->ts
.u
.derived
))
14183 if (!resolve_fl_derived0 (sym
))
14186 /* Resolve the type-bound procedures. */
14187 if (!resolve_typebound_procedures (sym
))
14190 /* Generate module vtables subject to their accessibility and their not
14191 being vtables or pdt templates. If this is not done class declarations
14192 in external procedures wind up with their own version and so SELECT TYPE
14193 fails because the vptrs do not have the same address. */
14194 if (gfc_option
.allow_std
& GFC_STD_F2003
14195 && sym
->ns
->proc_name
14196 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14197 && sym
->attr
.access
!= ACCESS_PRIVATE
14198 && !(sym
->attr
.use_assoc
|| sym
->attr
.vtype
|| sym
->attr
.pdt_template
))
14200 gfc_symbol
*vtab
= gfc_find_derived_vtab (sym
);
14201 gfc_set_sym_referenced (vtab
);
14209 resolve_fl_namelist (gfc_symbol
*sym
)
14214 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14216 /* Check again, the check in match only works if NAMELIST comes
14218 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SIZE
)
14220 gfc_error ("Assumed size array %qs in namelist %qs at %L is not "
14221 "allowed", nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14225 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SHAPE
14226 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14227 "with assumed shape in namelist %qs at %L",
14228 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14231 if (is_non_constant_shape_array (nl
->sym
)
14232 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14233 "with nonconstant shape in namelist %qs at %L",
14234 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14237 if (nl
->sym
->ts
.type
== BT_CHARACTER
14238 && (nl
->sym
->ts
.u
.cl
->length
== NULL
14239 || !gfc_is_constant_expr (nl
->sym
->ts
.u
.cl
->length
))
14240 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs with "
14241 "nonconstant character length in "
14242 "namelist %qs at %L", nl
->sym
->name
,
14243 sym
->name
, &sym
->declared_at
))
14248 /* Reject PRIVATE objects in a PUBLIC namelist. */
14249 if (gfc_check_symbol_access (sym
))
14251 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14253 if (!nl
->sym
->attr
.use_assoc
14254 && !is_sym_host_assoc (nl
->sym
, sym
->ns
)
14255 && !gfc_check_symbol_access (nl
->sym
))
14257 gfc_error ("NAMELIST object %qs was declared PRIVATE and "
14258 "cannot be member of PUBLIC namelist %qs at %L",
14259 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14263 if (nl
->sym
->ts
.type
== BT_DERIVED
14264 && (nl
->sym
->ts
.u
.derived
->attr
.alloc_comp
14265 || nl
->sym
->ts
.u
.derived
->attr
.pointer_comp
))
14267 if (!gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs in "
14268 "namelist %qs at %L with ALLOCATABLE "
14269 "or POINTER components", nl
->sym
->name
,
14270 sym
->name
, &sym
->declared_at
))
14275 /* Types with private components that came here by USE-association. */
14276 if (nl
->sym
->ts
.type
== BT_DERIVED
14277 && derived_inaccessible (nl
->sym
->ts
.u
.derived
))
14279 gfc_error ("NAMELIST object %qs has use-associated PRIVATE "
14280 "components and cannot be member of namelist %qs at %L",
14281 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14285 /* Types with private components that are defined in the same module. */
14286 if (nl
->sym
->ts
.type
== BT_DERIVED
14287 && !is_sym_host_assoc (nl
->sym
->ts
.u
.derived
, sym
->ns
)
14288 && nl
->sym
->ts
.u
.derived
->attr
.private_comp
)
14290 gfc_error ("NAMELIST object %qs has PRIVATE components and "
14291 "cannot be a member of PUBLIC namelist %qs at %L",
14292 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14299 /* 14.1.2 A module or internal procedure represent local entities
14300 of the same type as a namelist member and so are not allowed. */
14301 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14303 if (nl
->sym
->ts
.kind
!= 0 && nl
->sym
->attr
.flavor
== FL_VARIABLE
)
14306 if (nl
->sym
->attr
.function
&& nl
->sym
== nl
->sym
->result
)
14307 if ((nl
->sym
== sym
->ns
->proc_name
)
14309 (sym
->ns
->parent
&& nl
->sym
== sym
->ns
->parent
->proc_name
))
14314 gfc_find_symbol (nl
->sym
->name
, sym
->ns
, 1, &nlsym
);
14315 if (nlsym
&& nlsym
->attr
.flavor
== FL_PROCEDURE
)
14317 gfc_error ("PROCEDURE attribute conflicts with NAMELIST "
14318 "attribute in %qs at %L", nlsym
->name
,
14319 &sym
->declared_at
);
14326 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14327 nl
->sym
->attr
.asynchronous
= 1;
14334 resolve_fl_parameter (gfc_symbol
*sym
)
14336 /* A parameter array's shape needs to be constant. */
14337 if (sym
->as
!= NULL
14338 && (sym
->as
->type
== AS_DEFERRED
14339 || is_non_constant_shape_array (sym
)))
14341 gfc_error ("Parameter array %qs at %L cannot be automatic "
14342 "or of deferred shape", sym
->name
, &sym
->declared_at
);
14346 /* Constraints on deferred type parameter. */
14347 if (!deferred_requirements (sym
))
14350 /* Make sure a parameter that has been implicitly typed still
14351 matches the implicit type, since PARAMETER statements can precede
14352 IMPLICIT statements. */
14353 if (sym
->attr
.implicit_type
14354 && !gfc_compare_types (&sym
->ts
, gfc_get_default_type (sym
->name
,
14357 gfc_error ("Implicitly typed PARAMETER %qs at %L doesn't match a "
14358 "later IMPLICIT type", sym
->name
, &sym
->declared_at
);
14362 /* Make sure the types of derived parameters are consistent. This
14363 type checking is deferred until resolution because the type may
14364 refer to a derived type from the host. */
14365 if (sym
->ts
.type
== BT_DERIVED
14366 && !gfc_compare_types (&sym
->ts
, &sym
->value
->ts
))
14368 gfc_error ("Incompatible derived type in PARAMETER at %L",
14369 &sym
->value
->where
);
14373 /* F03:C509,C514. */
14374 if (sym
->ts
.type
== BT_CLASS
)
14376 gfc_error ("CLASS variable %qs at %L cannot have the PARAMETER attribute",
14377 sym
->name
, &sym
->declared_at
);
14385 /* Called by resolve_symbol to check PDTs. */
14388 resolve_pdt (gfc_symbol
* sym
)
14390 gfc_symbol
*derived
= NULL
;
14391 gfc_actual_arglist
*param
;
14393 bool const_len_exprs
= true;
14394 bool assumed_len_exprs
= false;
14395 symbol_attribute
*attr
;
14397 if (sym
->ts
.type
== BT_DERIVED
)
14399 derived
= sym
->ts
.u
.derived
;
14400 attr
= &(sym
->attr
);
14402 else if (sym
->ts
.type
== BT_CLASS
)
14404 derived
= CLASS_DATA (sym
)->ts
.u
.derived
;
14405 attr
= &(CLASS_DATA (sym
)->attr
);
14408 gcc_unreachable ();
14410 gcc_assert (derived
->attr
.pdt_type
);
14412 for (param
= sym
->param_list
; param
; param
= param
->next
)
14414 c
= gfc_find_component (derived
, param
->name
, false, true, NULL
);
14416 if (c
->attr
.pdt_kind
)
14419 if (param
->expr
&& !gfc_is_constant_expr (param
->expr
)
14420 && c
->attr
.pdt_len
)
14421 const_len_exprs
= false;
14422 else if (param
->spec_type
== SPEC_ASSUMED
)
14423 assumed_len_exprs
= true;
14425 if (param
->spec_type
== SPEC_DEFERRED
14426 && !attr
->allocatable
&& !attr
->pointer
)
14427 gfc_error ("The object %qs at %L has a deferred LEN "
14428 "parameter %qs and is neither allocatable "
14429 "nor a pointer", sym
->name
, &sym
->declared_at
,
14434 if (!const_len_exprs
14435 && (sym
->ns
->proc_name
->attr
.is_main_program
14436 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14437 || sym
->attr
.save
!= SAVE_NONE
))
14438 gfc_error ("The AUTOMATIC object %qs at %L must not have the "
14439 "SAVE attribute or be a variable declared in the "
14440 "main program, a module or a submodule(F08/C513)",
14441 sym
->name
, &sym
->declared_at
);
14443 if (assumed_len_exprs
&& !(sym
->attr
.dummy
14444 || sym
->attr
.select_type_temporary
|| sym
->attr
.associate_var
))
14445 gfc_error ("The object %qs at %L with ASSUMED type parameters "
14446 "must be a dummy or a SELECT TYPE selector(F08/4.2)",
14447 sym
->name
, &sym
->declared_at
);
14451 /* Do anything necessary to resolve a symbol. Right now, we just
14452 assume that an otherwise unknown symbol is a variable. This sort
14453 of thing commonly happens for symbols in module. */
14456 resolve_symbol (gfc_symbol
*sym
)
14458 int check_constant
, mp_flag
;
14459 gfc_symtree
*symtree
;
14460 gfc_symtree
*this_symtree
;
14463 symbol_attribute class_attr
;
14464 gfc_array_spec
*as
;
14465 bool saved_specification_expr
;
14471 /* No symbol will ever have union type; only components can be unions.
14472 Union type declaration symbols have type BT_UNKNOWN but flavor FL_UNION
14473 (just like derived type declaration symbols have flavor FL_DERIVED). */
14474 gcc_assert (sym
->ts
.type
!= BT_UNION
);
14476 /* Coarrayed polymorphic objects with allocatable or pointer components are
14477 yet unsupported for -fcoarray=lib. */
14478 if (flag_coarray
== GFC_FCOARRAY_LIB
&& sym
->ts
.type
== BT_CLASS
14479 && sym
->ts
.u
.derived
&& CLASS_DATA (sym
)
14480 && CLASS_DATA (sym
)->attr
.codimension
14481 && (CLASS_DATA (sym
)->ts
.u
.derived
->attr
.alloc_comp
14482 || CLASS_DATA (sym
)->ts
.u
.derived
->attr
.pointer_comp
))
14484 gfc_error ("Sorry, allocatable/pointer components in polymorphic (CLASS) "
14485 "type coarrays at %L are unsupported", &sym
->declared_at
);
14489 if (sym
->attr
.artificial
)
14492 if (sym
->attr
.unlimited_polymorphic
)
14495 if (sym
->attr
.flavor
== FL_UNKNOWN
14496 || (sym
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.intrinsic
14497 && !sym
->attr
.generic
&& !sym
->attr
.external
14498 && sym
->attr
.if_source
== IFSRC_UNKNOWN
14499 && sym
->ts
.type
== BT_UNKNOWN
))
14502 /* If we find that a flavorless symbol is an interface in one of the
14503 parent namespaces, find its symtree in this namespace, free the
14504 symbol and set the symtree to point to the interface symbol. */
14505 for (ns
= gfc_current_ns
->parent
; ns
; ns
= ns
->parent
)
14507 symtree
= gfc_find_symtree (ns
->sym_root
, sym
->name
);
14508 if (symtree
&& (symtree
->n
.sym
->generic
||
14509 (symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
14510 && sym
->ns
->construct_entities
)))
14512 this_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
14514 if (this_symtree
->n
.sym
== sym
)
14516 symtree
->n
.sym
->refs
++;
14517 gfc_release_symbol (sym
);
14518 this_symtree
->n
.sym
= symtree
->n
.sym
;
14524 /* Otherwise give it a flavor according to such attributes as
14526 if (sym
->attr
.flavor
== FL_UNKNOWN
&& sym
->attr
.external
== 0
14527 && sym
->attr
.intrinsic
== 0)
14528 sym
->attr
.flavor
= FL_VARIABLE
;
14529 else if (sym
->attr
.flavor
== FL_UNKNOWN
)
14531 sym
->attr
.flavor
= FL_PROCEDURE
;
14532 if (sym
->attr
.dimension
)
14533 sym
->attr
.function
= 1;
14537 if (sym
->attr
.external
&& sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.function
)
14538 gfc_add_function (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14540 if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
14541 && !resolve_procedure_interface (sym
))
14544 if (sym
->attr
.is_protected
&& !sym
->attr
.proc_pointer
14545 && (sym
->attr
.procedure
|| sym
->attr
.external
))
14547 if (sym
->attr
.external
)
14548 gfc_error ("PROTECTED attribute conflicts with EXTERNAL attribute "
14549 "at %L", &sym
->declared_at
);
14551 gfc_error ("PROCEDURE attribute conflicts with PROTECTED attribute "
14552 "at %L", &sym
->declared_at
);
14557 if (sym
->attr
.flavor
== FL_DERIVED
&& !resolve_fl_derived (sym
))
14560 else if ((sym
->attr
.flavor
== FL_STRUCT
|| sym
->attr
.flavor
== FL_UNION
)
14561 && !resolve_fl_struct (sym
))
14564 /* Symbols that are module procedures with results (functions) have
14565 the types and array specification copied for type checking in
14566 procedures that call them, as well as for saving to a module
14567 file. These symbols can't stand the scrutiny that their results
14569 mp_flag
= (sym
->result
!= NULL
&& sym
->result
!= sym
);
14571 /* Make sure that the intrinsic is consistent with its internal
14572 representation. This needs to be done before assigning a default
14573 type to avoid spurious warnings. */
14574 if (sym
->attr
.flavor
!= FL_MODULE
&& sym
->attr
.intrinsic
14575 && !gfc_resolve_intrinsic (sym
, &sym
->declared_at
))
14578 /* Resolve associate names. */
14580 resolve_assoc_var (sym
, true);
14582 /* Assign default type to symbols that need one and don't have one. */
14583 if (sym
->ts
.type
== BT_UNKNOWN
)
14585 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
)
14587 gfc_set_default_type (sym
, 1, NULL
);
14590 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.external
14591 && !sym
->attr
.function
&& !sym
->attr
.subroutine
14592 && gfc_get_default_type (sym
->name
, sym
->ns
)->type
== BT_UNKNOWN
)
14593 gfc_add_subroutine (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14595 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14597 /* The specific case of an external procedure should emit an error
14598 in the case that there is no implicit type. */
14601 if (!sym
->attr
.mixed_entry_master
)
14602 gfc_set_default_type (sym
, sym
->attr
.external
, NULL
);
14606 /* Result may be in another namespace. */
14607 resolve_symbol (sym
->result
);
14609 if (!sym
->result
->attr
.proc_pointer
)
14611 sym
->ts
= sym
->result
->ts
;
14612 sym
->as
= gfc_copy_array_spec (sym
->result
->as
);
14613 sym
->attr
.dimension
= sym
->result
->attr
.dimension
;
14614 sym
->attr
.pointer
= sym
->result
->attr
.pointer
;
14615 sym
->attr
.allocatable
= sym
->result
->attr
.allocatable
;
14616 sym
->attr
.contiguous
= sym
->result
->attr
.contiguous
;
14621 else if (mp_flag
&& sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14623 bool saved_specification_expr
= specification_expr
;
14624 specification_expr
= true;
14625 gfc_resolve_array_spec (sym
->result
->as
, false);
14626 specification_expr
= saved_specification_expr
;
14629 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
14631 as
= CLASS_DATA (sym
)->as
;
14632 class_attr
= CLASS_DATA (sym
)->attr
;
14633 class_attr
.pointer
= class_attr
.class_pointer
;
14637 class_attr
= sym
->attr
;
14642 if (sym
->attr
.contiguous
14643 && (!class_attr
.dimension
14644 || (as
->type
!= AS_ASSUMED_SHAPE
&& as
->type
!= AS_ASSUMED_RANK
14645 && !class_attr
.pointer
)))
14647 gfc_error ("%qs at %L has the CONTIGUOUS attribute but is not an "
14648 "array pointer or an assumed-shape or assumed-rank array",
14649 sym
->name
, &sym
->declared_at
);
14653 /* Assumed size arrays and assumed shape arrays must be dummy
14654 arguments. Array-spec's of implied-shape should have been resolved to
14655 AS_EXPLICIT already. */
14659 /* If AS_IMPLIED_SHAPE makes it to here, it must be a bad
14660 specification expression. */
14661 if (as
->type
== AS_IMPLIED_SHAPE
)
14664 for (i
=0; i
<as
->rank
; i
++)
14666 if (as
->lower
[i
] != NULL
&& as
->upper
[i
] == NULL
)
14668 gfc_error ("Bad specification for assumed size array at %L",
14669 &as
->lower
[i
]->where
);
14676 if (((as
->type
== AS_ASSUMED_SIZE
&& !as
->cp_was_assumed
)
14677 || as
->type
== AS_ASSUMED_SHAPE
)
14678 && !sym
->attr
.dummy
&& !sym
->attr
.select_type_temporary
)
14680 if (as
->type
== AS_ASSUMED_SIZE
)
14681 gfc_error ("Assumed size array at %L must be a dummy argument",
14682 &sym
->declared_at
);
14684 gfc_error ("Assumed shape array at %L must be a dummy argument",
14685 &sym
->declared_at
);
14688 /* TS 29113, C535a. */
14689 if (as
->type
== AS_ASSUMED_RANK
&& !sym
->attr
.dummy
14690 && !sym
->attr
.select_type_temporary
)
14692 gfc_error ("Assumed-rank array at %L must be a dummy argument",
14693 &sym
->declared_at
);
14696 if (as
->type
== AS_ASSUMED_RANK
14697 && (sym
->attr
.codimension
|| sym
->attr
.value
))
14699 gfc_error ("Assumed-rank array at %L may not have the VALUE or "
14700 "CODIMENSION attribute", &sym
->declared_at
);
14705 /* Make sure symbols with known intent or optional are really dummy
14706 variable. Because of ENTRY statement, this has to be deferred
14707 until resolution time. */
14709 if (!sym
->attr
.dummy
14710 && (sym
->attr
.optional
|| sym
->attr
.intent
!= INTENT_UNKNOWN
))
14712 gfc_error ("Symbol at %L is not a DUMMY variable", &sym
->declared_at
);
14716 if (sym
->attr
.value
&& !sym
->attr
.dummy
)
14718 gfc_error ("%qs at %L cannot have the VALUE attribute because "
14719 "it is not a dummy argument", sym
->name
, &sym
->declared_at
);
14723 if (sym
->attr
.value
&& sym
->ts
.type
== BT_CHARACTER
)
14725 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
14726 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
14728 gfc_error ("Character dummy variable %qs at %L with VALUE "
14729 "attribute must have constant length",
14730 sym
->name
, &sym
->declared_at
);
14734 if (sym
->ts
.is_c_interop
14735 && mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
14737 gfc_error ("C interoperable character dummy variable %qs at %L "
14738 "with VALUE attribute must have length one",
14739 sym
->name
, &sym
->declared_at
);
14744 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
14745 && sym
->ts
.u
.derived
->attr
.generic
)
14747 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
14748 if (!sym
->ts
.u
.derived
)
14750 gfc_error ("The derived type %qs at %L is of type %qs, "
14751 "which has not been defined", sym
->name
,
14752 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
14753 sym
->ts
.type
= BT_UNKNOWN
;
14758 /* Use the same constraints as TYPE(*), except for the type check
14759 and that only scalars and assumed-size arrays are permitted. */
14760 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
14762 if (!sym
->attr
.dummy
)
14764 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14765 "a dummy argument", sym
->name
, &sym
->declared_at
);
14769 if (sym
->ts
.type
!= BT_ASSUMED
&& sym
->ts
.type
!= BT_INTEGER
14770 && sym
->ts
.type
!= BT_REAL
&& sym
->ts
.type
!= BT_LOGICAL
14771 && sym
->ts
.type
!= BT_COMPLEX
)
14773 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14774 "of type TYPE(*) or of an numeric intrinsic type",
14775 sym
->name
, &sym
->declared_at
);
14779 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
14780 || sym
->attr
.pointer
|| sym
->attr
.value
)
14782 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
14783 "have the ALLOCATABLE, CODIMENSION, POINTER or VALUE "
14784 "attribute", sym
->name
, &sym
->declared_at
);
14788 if (sym
->attr
.intent
== INTENT_OUT
)
14790 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
14791 "have the INTENT(OUT) attribute",
14792 sym
->name
, &sym
->declared_at
);
14795 if (sym
->attr
.dimension
&& sym
->as
->type
!= AS_ASSUMED_SIZE
)
14797 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall "
14798 "either be a scalar or an assumed-size array",
14799 sym
->name
, &sym
->declared_at
);
14803 /* Set the type to TYPE(*) and add a dimension(*) to ensure
14804 NO_ARG_CHECK is correctly handled in trans*.c, e.g. with
14806 sym
->ts
.type
= BT_ASSUMED
;
14807 sym
->as
= gfc_get_array_spec ();
14808 sym
->as
->type
= AS_ASSUMED_SIZE
;
14810 sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
14812 else if (sym
->ts
.type
== BT_ASSUMED
)
14814 /* TS 29113, C407a. */
14815 if (!sym
->attr
.dummy
)
14817 gfc_error ("Assumed type of variable %s at %L is only permitted "
14818 "for dummy variables", sym
->name
, &sym
->declared_at
);
14821 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
14822 || sym
->attr
.pointer
|| sym
->attr
.value
)
14824 gfc_error ("Assumed-type variable %s at %L may not have the "
14825 "ALLOCATABLE, CODIMENSION, POINTER or VALUE attribute",
14826 sym
->name
, &sym
->declared_at
);
14829 if (sym
->attr
.intent
== INTENT_OUT
)
14831 gfc_error ("Assumed-type variable %s at %L may not have the "
14832 "INTENT(OUT) attribute",
14833 sym
->name
, &sym
->declared_at
);
14836 if (sym
->attr
.dimension
&& sym
->as
->type
== AS_EXPLICIT
)
14838 gfc_error ("Assumed-type variable %s at %L shall not be an "
14839 "explicit-shape array", sym
->name
, &sym
->declared_at
);
14844 /* If the symbol is marked as bind(c), that it is declared at module level
14845 scope and verify its type and kind. Do not do the latter for symbols
14846 that are implicitly typed because that is handled in
14847 gfc_set_default_type. Handle dummy arguments and procedure definitions
14848 separately. Also, anything that is use associated is not handled here
14849 but instead is handled in the module it is declared in. Finally, derived
14850 type definitions are allowed to be BIND(C) since that only implies that
14851 they're interoperable, and they are checked fully for interoperability
14852 when a variable is declared of that type. */
14853 if (sym
->attr
.is_bind_c
&& sym
->attr
.use_assoc
== 0
14854 && sym
->attr
.dummy
== 0 && sym
->attr
.flavor
!= FL_PROCEDURE
14855 && sym
->attr
.flavor
!= FL_DERIVED
)
14859 /* First, make sure the variable is declared at the
14860 module-level scope (J3/04-007, Section 15.3). */
14861 if (sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
&&
14862 sym
->attr
.in_common
== 0)
14864 gfc_error ("Variable %qs at %L cannot be BIND(C) because it "
14865 "is neither a COMMON block nor declared at the "
14866 "module level scope", sym
->name
, &(sym
->declared_at
));
14869 else if (sym
->ts
.type
== BT_CHARACTER
14870 && (sym
->ts
.u
.cl
== NULL
|| sym
->ts
.u
.cl
->length
== NULL
14871 || !gfc_is_constant_expr (sym
->ts
.u
.cl
->length
)
14872 || mpz_cmp_si (sym
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
14874 gfc_error ("BIND(C) Variable %qs at %L must have length one",
14875 sym
->name
, &sym
->declared_at
);
14878 else if (sym
->common_head
!= NULL
&& sym
->attr
.implicit_type
== 0)
14880 t
= verify_com_block_vars_c_interop (sym
->common_head
);
14882 else if (sym
->attr
.implicit_type
== 0)
14884 /* If type() declaration, we need to verify that the components
14885 of the given type are all C interoperable, etc. */
14886 if (sym
->ts
.type
== BT_DERIVED
&&
14887 sym
->ts
.u
.derived
->attr
.is_c_interop
!= 1)
14889 /* Make sure the user marked the derived type as BIND(C). If
14890 not, call the verify routine. This could print an error
14891 for the derived type more than once if multiple variables
14892 of that type are declared. */
14893 if (sym
->ts
.u
.derived
->attr
.is_bind_c
!= 1)
14894 verify_bind_c_derived_type (sym
->ts
.u
.derived
);
14898 /* Verify the variable itself as C interoperable if it
14899 is BIND(C). It is not possible for this to succeed if
14900 the verify_bind_c_derived_type failed, so don't have to handle
14901 any error returned by verify_bind_c_derived_type. */
14902 t
= verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
14903 sym
->common_block
);
14908 /* clear the is_bind_c flag to prevent reporting errors more than
14909 once if something failed. */
14910 sym
->attr
.is_bind_c
= 0;
14915 /* If a derived type symbol has reached this point, without its
14916 type being declared, we have an error. Notice that most
14917 conditions that produce undefined derived types have already
14918 been dealt with. However, the likes of:
14919 implicit type(t) (t) ..... call foo (t) will get us here if
14920 the type is not declared in the scope of the implicit
14921 statement. Change the type to BT_UNKNOWN, both because it is so
14922 and to prevent an ICE. */
14923 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
14924 && sym
->ts
.u
.derived
->components
== NULL
14925 && !sym
->ts
.u
.derived
->attr
.zero_comp
)
14927 gfc_error ("The derived type %qs at %L is of type %qs, "
14928 "which has not been defined", sym
->name
,
14929 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
14930 sym
->ts
.type
= BT_UNKNOWN
;
14934 /* Make sure that the derived type has been resolved and that the
14935 derived type is visible in the symbol's namespace, if it is a
14936 module function and is not PRIVATE. */
14937 if (sym
->ts
.type
== BT_DERIVED
14938 && sym
->ts
.u
.derived
->attr
.use_assoc
14939 && sym
->ns
->proc_name
14940 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14941 && !resolve_fl_derived (sym
->ts
.u
.derived
))
14944 /* Unless the derived-type declaration is use associated, Fortran 95
14945 does not allow public entries of private derived types.
14946 See 4.4.1 (F95) and 4.5.1.1 (F2003); and related interpretation
14947 161 in 95-006r3. */
14948 if (sym
->ts
.type
== BT_DERIVED
14949 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14950 && !sym
->ts
.u
.derived
->attr
.use_assoc
14951 && gfc_check_symbol_access (sym
)
14952 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
14953 && !gfc_notify_std (GFC_STD_F2003
, "PUBLIC %s %qs at %L of PRIVATE "
14954 "derived type %qs",
14955 (sym
->attr
.flavor
== FL_PARAMETER
)
14956 ? "parameter" : "variable",
14957 sym
->name
, &sym
->declared_at
,
14958 sym
->ts
.u
.derived
->name
))
14961 /* F2008, C1302. */
14962 if (sym
->ts
.type
== BT_DERIVED
14963 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
14964 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
14965 || sym
->ts
.u
.derived
->attr
.lock_comp
)
14966 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
14968 gfc_error ("Variable %s at %L of type LOCK_TYPE or with subcomponent of "
14969 "type LOCK_TYPE must be a coarray", sym
->name
,
14970 &sym
->declared_at
);
14974 /* TS18508, C702/C703. */
14975 if (sym
->ts
.type
== BT_DERIVED
14976 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
14977 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
14978 || sym
->ts
.u
.derived
->attr
.event_comp
)
14979 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
14981 gfc_error ("Variable %s at %L of type EVENT_TYPE or with subcomponent of "
14982 "type EVENT_TYPE must be a coarray", sym
->name
,
14983 &sym
->declared_at
);
14987 /* An assumed-size array with INTENT(OUT) shall not be of a type for which
14988 default initialization is defined (5.1.2.4.4). */
14989 if (sym
->ts
.type
== BT_DERIVED
14991 && sym
->attr
.intent
== INTENT_OUT
14993 && sym
->as
->type
== AS_ASSUMED_SIZE
)
14995 for (c
= sym
->ts
.u
.derived
->components
; c
; c
= c
->next
)
14997 if (c
->initializer
)
14999 gfc_error ("The INTENT(OUT) dummy argument %qs at %L is "
15000 "ASSUMED SIZE and so cannot have a default initializer",
15001 sym
->name
, &sym
->declared_at
);
15008 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15009 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.lock_comp
)
15011 gfc_error ("Dummy argument %qs at %L of LOCK_TYPE shall not be "
15012 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15017 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15018 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.event_comp
)
15020 gfc_error ("Dummy argument %qs at %L of EVENT_TYPE shall not be "
15021 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15026 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15027 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15028 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15029 || class_attr
.codimension
)
15030 && (sym
->attr
.result
|| sym
->result
== sym
))
15032 gfc_error ("Function result %qs at %L shall not be a coarray or have "
15033 "a coarray component", sym
->name
, &sym
->declared_at
);
15038 if (sym
->attr
.codimension
&& sym
->ts
.type
== BT_DERIVED
15039 && sym
->ts
.u
.derived
->ts
.is_iso_c
)
15041 gfc_error ("Variable %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
15042 "shall not be a coarray", sym
->name
, &sym
->declared_at
);
15047 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15048 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15049 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15050 && (class_attr
.codimension
|| class_attr
.pointer
|| class_attr
.dimension
15051 || class_attr
.allocatable
))
15053 gfc_error ("Variable %qs at %L with coarray component shall be a "
15054 "nonpointer, nonallocatable scalar, which is not a coarray",
15055 sym
->name
, &sym
->declared_at
);
15059 /* F2008, C526. The function-result case was handled above. */
15060 if (class_attr
.codimension
15061 && !(class_attr
.allocatable
|| sym
->attr
.dummy
|| sym
->attr
.save
15062 || sym
->attr
.select_type_temporary
15063 || sym
->attr
.associate_var
15064 || (sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15065 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15066 || sym
->ns
->proc_name
->attr
.is_main_program
15067 || sym
->attr
.function
|| sym
->attr
.result
|| sym
->attr
.use_assoc
))
15069 gfc_error ("Variable %qs at %L is a coarray and is not ALLOCATABLE, SAVE "
15070 "nor a dummy argument", sym
->name
, &sym
->declared_at
);
15074 else if (class_attr
.codimension
&& !sym
->attr
.select_type_temporary
15075 && !class_attr
.allocatable
&& as
&& as
->cotype
== AS_DEFERRED
)
15077 gfc_error ("Coarray variable %qs at %L shall not have codimensions with "
15078 "deferred shape", sym
->name
, &sym
->declared_at
);
15081 else if (class_attr
.codimension
&& class_attr
.allocatable
&& as
15082 && (as
->cotype
!= AS_DEFERRED
|| as
->type
!= AS_DEFERRED
))
15084 gfc_error ("Allocatable coarray variable %qs at %L must have "
15085 "deferred shape", sym
->name
, &sym
->declared_at
);
15090 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15091 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15092 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15093 || (class_attr
.codimension
&& class_attr
.allocatable
))
15094 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
)
15096 gfc_error ("Variable %qs at %L is INTENT(OUT) and can thus not be an "
15097 "allocatable coarray or have coarray components",
15098 sym
->name
, &sym
->declared_at
);
15102 if (class_attr
.codimension
&& sym
->attr
.dummy
15103 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.is_bind_c
)
15105 gfc_error ("Coarray dummy variable %qs at %L not allowed in BIND(C) "
15106 "procedure %qs", sym
->name
, &sym
->declared_at
,
15107 sym
->ns
->proc_name
->name
);
15111 if (sym
->ts
.type
== BT_LOGICAL
15112 && ((sym
->attr
.function
&& sym
->attr
.is_bind_c
&& sym
->result
== sym
)
15113 || ((sym
->attr
.dummy
|| sym
->attr
.result
) && sym
->ns
->proc_name
15114 && sym
->ns
->proc_name
->attr
.is_bind_c
)))
15117 for (i
= 0; gfc_logical_kinds
[i
].kind
; i
++)
15118 if (gfc_logical_kinds
[i
].kind
== sym
->ts
.kind
)
15120 if (!gfc_logical_kinds
[i
].c_bool
&& sym
->attr
.dummy
15121 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL dummy argument %qs at "
15122 "%L with non-C_Bool kind in BIND(C) procedure "
15123 "%qs", sym
->name
, &sym
->declared_at
,
15124 sym
->ns
->proc_name
->name
))
15126 else if (!gfc_logical_kinds
[i
].c_bool
15127 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL result variable "
15128 "%qs at %L with non-C_Bool kind in "
15129 "BIND(C) procedure %qs", sym
->name
,
15131 sym
->attr
.function
? sym
->name
15132 : sym
->ns
->proc_name
->name
))
15136 switch (sym
->attr
.flavor
)
15139 if (!resolve_fl_variable (sym
, mp_flag
))
15144 if (sym
->formal
&& !sym
->formal_ns
)
15146 /* Check that none of the arguments are a namelist. */
15147 gfc_formal_arglist
*formal
= sym
->formal
;
15149 for (; formal
; formal
= formal
->next
)
15150 if (formal
->sym
&& formal
->sym
->attr
.flavor
== FL_NAMELIST
)
15152 gfc_error ("Namelist %qs can not be an argument to "
15153 "subroutine or function at %L",
15154 formal
->sym
->name
, &sym
->declared_at
);
15159 if (!resolve_fl_procedure (sym
, mp_flag
))
15164 if (!resolve_fl_namelist (sym
))
15169 if (!resolve_fl_parameter (sym
))
15177 /* Resolve array specifier. Check as well some constraints
15178 on COMMON blocks. */
15180 check_constant
= sym
->attr
.in_common
&& !sym
->attr
.pointer
;
15182 /* Set the formal_arg_flag so that check_conflict will not throw
15183 an error for host associated variables in the specification
15184 expression for an array_valued function. */
15185 if (sym
->attr
.function
&& sym
->as
)
15186 formal_arg_flag
= true;
15188 saved_specification_expr
= specification_expr
;
15189 specification_expr
= true;
15190 gfc_resolve_array_spec (sym
->as
, check_constant
);
15191 specification_expr
= saved_specification_expr
;
15193 formal_arg_flag
= false;
15195 /* Resolve formal namespaces. */
15196 if (sym
->formal_ns
&& sym
->formal_ns
!= gfc_current_ns
15197 && !sym
->attr
.contained
&& !sym
->attr
.intrinsic
)
15198 gfc_resolve (sym
->formal_ns
);
15200 /* Make sure the formal namespace is present. */
15201 if (sym
->formal
&& !sym
->formal_ns
)
15203 gfc_formal_arglist
*formal
= sym
->formal
;
15204 while (formal
&& !formal
->sym
)
15205 formal
= formal
->next
;
15209 sym
->formal_ns
= formal
->sym
->ns
;
15210 if (sym
->ns
!= formal
->sym
->ns
)
15211 sym
->formal_ns
->refs
++;
15215 /* Check threadprivate restrictions. */
15216 if (sym
->attr
.threadprivate
&& !sym
->attr
.save
15217 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15218 && (!sym
->attr
.in_common
15219 && sym
->module
== NULL
15220 && (sym
->ns
->proc_name
== NULL
15221 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15222 gfc_error ("Threadprivate at %L isn't SAVEd", &sym
->declared_at
);
15224 /* Check omp declare target restrictions. */
15225 if (sym
->attr
.omp_declare_target
15226 && sym
->attr
.flavor
== FL_VARIABLE
15228 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15229 && (!sym
->attr
.in_common
15230 && sym
->module
== NULL
15231 && (sym
->ns
->proc_name
== NULL
15232 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15233 gfc_error ("!$OMP DECLARE TARGET variable %qs at %L isn't SAVEd",
15234 sym
->name
, &sym
->declared_at
);
15236 /* If we have come this far we can apply default-initializers, as
15237 described in 14.7.5, to those variables that have not already
15238 been assigned one. */
15239 if (sym
->ts
.type
== BT_DERIVED
15241 && !sym
->attr
.allocatable
15242 && !sym
->attr
.alloc_comp
)
15244 symbol_attribute
*a
= &sym
->attr
;
15246 if ((!a
->save
&& !a
->dummy
&& !a
->pointer
15247 && !a
->in_common
&& !a
->use_assoc
15249 && !((a
->function
|| a
->result
)
15251 || sym
->ts
.u
.derived
->attr
.alloc_comp
15252 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15253 && !(a
->function
&& sym
!= sym
->result
))
15254 || (a
->dummy
&& a
->intent
== INTENT_OUT
&& !a
->pointer
))
15255 apply_default_init (sym
);
15256 else if (a
->function
&& sym
->result
&& a
->access
!= ACCESS_PRIVATE
15257 && (sym
->ts
.u
.derived
->attr
.alloc_comp
15258 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15259 /* Mark the result symbol to be referenced, when it has allocatable
15261 sym
->result
->attr
.referenced
= 1;
15264 if (sym
->ts
.type
== BT_CLASS
&& sym
->ns
== gfc_current_ns
15265 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
15266 && !CLASS_DATA (sym
)->attr
.class_pointer
15267 && !CLASS_DATA (sym
)->attr
.allocatable
)
15268 apply_default_init (sym
);
15270 /* If this symbol has a type-spec, check it. */
15271 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
15272 || (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
))
15273 if (!resolve_typespec_used (&sym
->ts
, &sym
->declared_at
, sym
->name
))
15276 if (sym
->param_list
)
15281 /************* Resolve DATA statements *************/
15285 gfc_data_value
*vnode
;
15291 /* Advance the values structure to point to the next value in the data list. */
15294 next_data_value (void)
15296 while (mpz_cmp_ui (values
.left
, 0) == 0)
15299 if (values
.vnode
->next
== NULL
)
15302 values
.vnode
= values
.vnode
->next
;
15303 mpz_set (values
.left
, values
.vnode
->repeat
);
15311 check_data_variable (gfc_data_variable
*var
, locus
*where
)
15317 ar_type mark
= AR_UNKNOWN
;
15319 mpz_t section_index
[GFC_MAX_DIMENSIONS
];
15325 if (!gfc_resolve_expr (var
->expr
))
15329 mpz_init_set_si (offset
, 0);
15332 if (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
15333 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
15334 e
= e
->value
.function
.actual
->expr
;
15336 if (e
->expr_type
!= EXPR_VARIABLE
)
15337 gfc_internal_error ("check_data_variable(): Bad expression");
15339 sym
= e
->symtree
->n
.sym
;
15341 if (sym
->ns
->is_block_data
&& !sym
->attr
.in_common
)
15343 gfc_error ("BLOCK DATA element %qs at %L must be in COMMON",
15344 sym
->name
, &sym
->declared_at
);
15347 if (e
->ref
== NULL
&& sym
->as
)
15349 gfc_error ("DATA array %qs at %L must be specified in a previous"
15350 " declaration", sym
->name
, where
);
15354 has_pointer
= sym
->attr
.pointer
;
15356 if (gfc_is_coindexed (e
))
15358 gfc_error ("DATA element %qs at %L cannot have a coindex", sym
->name
,
15363 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15365 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.pointer
)
15369 && ref
->type
== REF_ARRAY
15370 && ref
->u
.ar
.type
!= AR_FULL
)
15372 gfc_error ("DATA element %qs at %L is a pointer and so must "
15373 "be a full array", sym
->name
, where
);
15378 if (e
->rank
== 0 || has_pointer
)
15380 mpz_init_set_ui (size
, 1);
15387 /* Find the array section reference. */
15388 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15390 if (ref
->type
!= REF_ARRAY
)
15392 if (ref
->u
.ar
.type
== AR_ELEMENT
)
15398 /* Set marks according to the reference pattern. */
15399 switch (ref
->u
.ar
.type
)
15407 /* Get the start position of array section. */
15408 gfc_get_section_index (ar
, section_index
, &offset
);
15413 gcc_unreachable ();
15416 if (!gfc_array_size (e
, &size
))
15418 gfc_error ("Nonconstant array section at %L in DATA statement",
15420 mpz_clear (offset
);
15427 while (mpz_cmp_ui (size
, 0) > 0)
15429 if (!next_data_value ())
15431 gfc_error ("DATA statement at %L has more variables than values",
15437 t
= gfc_check_assign (var
->expr
, values
.vnode
->expr
, 0);
15441 /* If we have more than one element left in the repeat count,
15442 and we have more than one element left in the target variable,
15443 then create a range assignment. */
15444 /* FIXME: Only done for full arrays for now, since array sections
15446 if (mark
== AR_FULL
&& ref
&& ref
->next
== NULL
15447 && mpz_cmp_ui (values
.left
, 1) > 0 && mpz_cmp_ui (size
, 1) > 0)
15451 if (mpz_cmp (size
, values
.left
) >= 0)
15453 mpz_init_set (range
, values
.left
);
15454 mpz_sub (size
, size
, values
.left
);
15455 mpz_set_ui (values
.left
, 0);
15459 mpz_init_set (range
, size
);
15460 mpz_sub (values
.left
, values
.left
, size
);
15461 mpz_set_ui (size
, 0);
15464 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15467 mpz_add (offset
, offset
, range
);
15474 /* Assign initial value to symbol. */
15477 mpz_sub_ui (values
.left
, values
.left
, 1);
15478 mpz_sub_ui (size
, size
, 1);
15480 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15485 if (mark
== AR_FULL
)
15486 mpz_add_ui (offset
, offset
, 1);
15488 /* Modify the array section indexes and recalculate the offset
15489 for next element. */
15490 else if (mark
== AR_SECTION
)
15491 gfc_advance_section (section_index
, ar
, &offset
);
15495 if (mark
== AR_SECTION
)
15497 for (i
= 0; i
< ar
->dimen
; i
++)
15498 mpz_clear (section_index
[i
]);
15502 mpz_clear (offset
);
15508 static bool traverse_data_var (gfc_data_variable
*, locus
*);
15510 /* Iterate over a list of elements in a DATA statement. */
15513 traverse_data_list (gfc_data_variable
*var
, locus
*where
)
15516 iterator_stack frame
;
15517 gfc_expr
*e
, *start
, *end
, *step
;
15518 bool retval
= true;
15520 mpz_init (frame
.value
);
15523 start
= gfc_copy_expr (var
->iter
.start
);
15524 end
= gfc_copy_expr (var
->iter
.end
);
15525 step
= gfc_copy_expr (var
->iter
.step
);
15527 if (!gfc_simplify_expr (start
, 1)
15528 || start
->expr_type
!= EXPR_CONSTANT
)
15530 gfc_error ("start of implied-do loop at %L could not be "
15531 "simplified to a constant value", &start
->where
);
15535 if (!gfc_simplify_expr (end
, 1)
15536 || end
->expr_type
!= EXPR_CONSTANT
)
15538 gfc_error ("end of implied-do loop at %L could not be "
15539 "simplified to a constant value", &start
->where
);
15543 if (!gfc_simplify_expr (step
, 1)
15544 || step
->expr_type
!= EXPR_CONSTANT
)
15546 gfc_error ("step of implied-do loop at %L could not be "
15547 "simplified to a constant value", &start
->where
);
15552 mpz_set (trip
, end
->value
.integer
);
15553 mpz_sub (trip
, trip
, start
->value
.integer
);
15554 mpz_add (trip
, trip
, step
->value
.integer
);
15556 mpz_div (trip
, trip
, step
->value
.integer
);
15558 mpz_set (frame
.value
, start
->value
.integer
);
15560 frame
.prev
= iter_stack
;
15561 frame
.variable
= var
->iter
.var
->symtree
;
15562 iter_stack
= &frame
;
15564 while (mpz_cmp_ui (trip
, 0) > 0)
15566 if (!traverse_data_var (var
->list
, where
))
15572 e
= gfc_copy_expr (var
->expr
);
15573 if (!gfc_simplify_expr (e
, 1))
15580 mpz_add (frame
.value
, frame
.value
, step
->value
.integer
);
15582 mpz_sub_ui (trip
, trip
, 1);
15586 mpz_clear (frame
.value
);
15589 gfc_free_expr (start
);
15590 gfc_free_expr (end
);
15591 gfc_free_expr (step
);
15593 iter_stack
= frame
.prev
;
15598 /* Type resolve variables in the variable list of a DATA statement. */
15601 traverse_data_var (gfc_data_variable
*var
, locus
*where
)
15605 for (; var
; var
= var
->next
)
15607 if (var
->expr
== NULL
)
15608 t
= traverse_data_list (var
, where
);
15610 t
= check_data_variable (var
, where
);
15620 /* Resolve the expressions and iterators associated with a data statement.
15621 This is separate from the assignment checking because data lists should
15622 only be resolved once. */
15625 resolve_data_variables (gfc_data_variable
*d
)
15627 for (; d
; d
= d
->next
)
15629 if (d
->list
== NULL
)
15631 if (!gfc_resolve_expr (d
->expr
))
15636 if (!gfc_resolve_iterator (&d
->iter
, false, true))
15639 if (!resolve_data_variables (d
->list
))
15648 /* Resolve a single DATA statement. We implement this by storing a pointer to
15649 the value list into static variables, and then recursively traversing the
15650 variables list, expanding iterators and such. */
15653 resolve_data (gfc_data
*d
)
15656 if (!resolve_data_variables (d
->var
))
15659 values
.vnode
= d
->value
;
15660 if (d
->value
== NULL
)
15661 mpz_set_ui (values
.left
, 0);
15663 mpz_set (values
.left
, d
->value
->repeat
);
15665 if (!traverse_data_var (d
->var
, &d
->where
))
15668 /* At this point, we better not have any values left. */
15670 if (next_data_value ())
15671 gfc_error ("DATA statement at %L has more values than variables",
15676 /* 12.6 Constraint: In a pure subprogram any variable which is in common or
15677 accessed by host or use association, is a dummy argument to a pure function,
15678 is a dummy argument with INTENT (IN) to a pure subroutine, or an object that
15679 is storage associated with any such variable, shall not be used in the
15680 following contexts: (clients of this function). */
15682 /* Determines if a variable is not 'pure', i.e., not assignable within a pure
15683 procedure. Returns zero if assignment is OK, nonzero if there is a
15686 gfc_impure_variable (gfc_symbol
*sym
)
15691 if (sym
->attr
.use_assoc
|| sym
->attr
.in_common
)
15694 /* Check if the symbol's ns is inside the pure procedure. */
15695 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15699 if (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.function
)
15703 proc
= sym
->ns
->proc_name
;
15704 if (sym
->attr
.dummy
15705 && ((proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_IN
)
15706 || proc
->attr
.function
))
15709 /* TODO: Sort out what can be storage associated, if anything, and include
15710 it here. In principle equivalences should be scanned but it does not
15711 seem to be possible to storage associate an impure variable this way. */
15716 /* Test whether a symbol is pure or not. For a NULL pointer, checks if the
15717 current namespace is inside a pure procedure. */
15720 gfc_pure (gfc_symbol
*sym
)
15722 symbol_attribute attr
;
15727 /* Check if the current namespace or one of its parents
15728 belongs to a pure procedure. */
15729 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15731 sym
= ns
->proc_name
;
15735 if (attr
.flavor
== FL_PROCEDURE
&& attr
.pure
)
15743 return attr
.flavor
== FL_PROCEDURE
&& attr
.pure
;
15747 /* Test whether a symbol is implicitly pure or not. For a NULL pointer,
15748 checks if the current namespace is implicitly pure. Note that this
15749 function returns false for a PURE procedure. */
15752 gfc_implicit_pure (gfc_symbol
*sym
)
15758 /* Check if the current procedure is implicit_pure. Walk up
15759 the procedure list until we find a procedure. */
15760 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15762 sym
= ns
->proc_name
;
15766 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15771 return sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.implicit_pure
15772 && !sym
->attr
.pure
;
15777 gfc_unset_implicit_pure (gfc_symbol
*sym
)
15783 /* Check if the current procedure is implicit_pure. Walk up
15784 the procedure list until we find a procedure. */
15785 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15787 sym
= ns
->proc_name
;
15791 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15796 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15797 sym
->attr
.implicit_pure
= 0;
15799 sym
->attr
.pure
= 0;
15803 /* Test whether the current procedure is elemental or not. */
15806 gfc_elemental (gfc_symbol
*sym
)
15808 symbol_attribute attr
;
15811 sym
= gfc_current_ns
->proc_name
;
15816 return attr
.flavor
== FL_PROCEDURE
&& attr
.elemental
;
15820 /* Warn about unused labels. */
15823 warn_unused_fortran_label (gfc_st_label
*label
)
15828 warn_unused_fortran_label (label
->left
);
15830 if (label
->defined
== ST_LABEL_UNKNOWN
)
15833 switch (label
->referenced
)
15835 case ST_LABEL_UNKNOWN
:
15836 gfc_warning (OPT_Wunused_label
, "Label %d at %L defined but not used",
15837 label
->value
, &label
->where
);
15840 case ST_LABEL_BAD_TARGET
:
15841 gfc_warning (OPT_Wunused_label
,
15842 "Label %d at %L defined but cannot be used",
15843 label
->value
, &label
->where
);
15850 warn_unused_fortran_label (label
->right
);
15854 /* Returns the sequence type of a symbol or sequence. */
15857 sequence_type (gfc_typespec ts
)
15866 if (ts
.u
.derived
->components
== NULL
)
15867 return SEQ_NONDEFAULT
;
15869 result
= sequence_type (ts
.u
.derived
->components
->ts
);
15870 for (c
= ts
.u
.derived
->components
->next
; c
; c
= c
->next
)
15871 if (sequence_type (c
->ts
) != result
)
15877 if (ts
.kind
!= gfc_default_character_kind
)
15878 return SEQ_NONDEFAULT
;
15880 return SEQ_CHARACTER
;
15883 if (ts
.kind
!= gfc_default_integer_kind
)
15884 return SEQ_NONDEFAULT
;
15886 return SEQ_NUMERIC
;
15889 if (!(ts
.kind
== gfc_default_real_kind
15890 || ts
.kind
== gfc_default_double_kind
))
15891 return SEQ_NONDEFAULT
;
15893 return SEQ_NUMERIC
;
15896 if (ts
.kind
!= gfc_default_complex_kind
)
15897 return SEQ_NONDEFAULT
;
15899 return SEQ_NUMERIC
;
15902 if (ts
.kind
!= gfc_default_logical_kind
)
15903 return SEQ_NONDEFAULT
;
15905 return SEQ_NUMERIC
;
15908 return SEQ_NONDEFAULT
;
15913 /* Resolve derived type EQUIVALENCE object. */
15916 resolve_equivalence_derived (gfc_symbol
*derived
, gfc_symbol
*sym
, gfc_expr
*e
)
15918 gfc_component
*c
= derived
->components
;
15923 /* Shall not be an object of nonsequence derived type. */
15924 if (!derived
->attr
.sequence
)
15926 gfc_error ("Derived type variable %qs at %L must have SEQUENCE "
15927 "attribute to be an EQUIVALENCE object", sym
->name
,
15932 /* Shall not have allocatable components. */
15933 if (derived
->attr
.alloc_comp
)
15935 gfc_error ("Derived type variable %qs at %L cannot have ALLOCATABLE "
15936 "components to be an EQUIVALENCE object",sym
->name
,
15941 if (sym
->attr
.in_common
&& gfc_has_default_initializer (sym
->ts
.u
.derived
))
15943 gfc_error ("Derived type variable %qs at %L with default "
15944 "initialization cannot be in EQUIVALENCE with a variable "
15945 "in COMMON", sym
->name
, &e
->where
);
15949 for (; c
; c
= c
->next
)
15951 if (gfc_bt_struct (c
->ts
.type
)
15952 && (!resolve_equivalence_derived(c
->ts
.u
.derived
, sym
, e
)))
15955 /* Shall not be an object of sequence derived type containing a pointer
15956 in the structure. */
15957 if (c
->attr
.pointer
)
15959 gfc_error ("Derived type variable %qs at %L with pointer "
15960 "component(s) cannot be an EQUIVALENCE object",
15961 sym
->name
, &e
->where
);
15969 /* Resolve equivalence object.
15970 An EQUIVALENCE object shall not be a dummy argument, a pointer, a target,
15971 an allocatable array, an object of nonsequence derived type, an object of
15972 sequence derived type containing a pointer at any level of component
15973 selection, an automatic object, a function name, an entry name, a result
15974 name, a named constant, a structure component, or a subobject of any of
15975 the preceding objects. A substring shall not have length zero. A
15976 derived type shall not have components with default initialization nor
15977 shall two objects of an equivalence group be initialized.
15978 Either all or none of the objects shall have an protected attribute.
15979 The simple constraints are done in symbol.c(check_conflict) and the rest
15980 are implemented here. */
15983 resolve_equivalence (gfc_equiv
*eq
)
15986 gfc_symbol
*first_sym
;
15989 locus
*last_where
= NULL
;
15990 seq_type eq_type
, last_eq_type
;
15991 gfc_typespec
*last_ts
;
15992 int object
, cnt_protected
;
15995 last_ts
= &eq
->expr
->symtree
->n
.sym
->ts
;
15997 first_sym
= eq
->expr
->symtree
->n
.sym
;
16001 for (object
= 1; eq
; eq
= eq
->eq
, object
++)
16005 e
->ts
= e
->symtree
->n
.sym
->ts
;
16006 /* match_varspec might not know yet if it is seeing
16007 array reference or substring reference, as it doesn't
16009 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
)
16011 gfc_ref
*ref
= e
->ref
;
16012 sym
= e
->symtree
->n
.sym
;
16014 if (sym
->attr
.dimension
)
16016 ref
->u
.ar
.as
= sym
->as
;
16020 /* For substrings, convert REF_ARRAY into REF_SUBSTRING. */
16021 if (e
->ts
.type
== BT_CHARACTER
16023 && ref
->type
== REF_ARRAY
16024 && ref
->u
.ar
.dimen
== 1
16025 && ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
16026 && ref
->u
.ar
.stride
[0] == NULL
)
16028 gfc_expr
*start
= ref
->u
.ar
.start
[0];
16029 gfc_expr
*end
= ref
->u
.ar
.end
[0];
16032 /* Optimize away the (:) reference. */
16033 if (start
== NULL
&& end
== NULL
)
16036 e
->ref
= ref
->next
;
16038 e
->ref
->next
= ref
->next
;
16043 ref
->type
= REF_SUBSTRING
;
16045 start
= gfc_get_int_expr (gfc_charlen_int_kind
,
16047 ref
->u
.ss
.start
= start
;
16048 if (end
== NULL
&& e
->ts
.u
.cl
)
16049 end
= gfc_copy_expr (e
->ts
.u
.cl
->length
);
16050 ref
->u
.ss
.end
= end
;
16051 ref
->u
.ss
.length
= e
->ts
.u
.cl
;
16058 /* Any further ref is an error. */
16061 gcc_assert (ref
->type
== REF_ARRAY
);
16062 gfc_error ("Syntax error in EQUIVALENCE statement at %L",
16068 if (!gfc_resolve_expr (e
))
16071 sym
= e
->symtree
->n
.sym
;
16073 if (sym
->attr
.is_protected
)
16075 if (cnt_protected
> 0 && cnt_protected
!= object
)
16077 gfc_error ("Either all or none of the objects in the "
16078 "EQUIVALENCE set at %L shall have the "
16079 "PROTECTED attribute",
16084 /* Shall not equivalence common block variables in a PURE procedure. */
16085 if (sym
->ns
->proc_name
16086 && sym
->ns
->proc_name
->attr
.pure
16087 && sym
->attr
.in_common
)
16089 /* Need to check for symbols that may have entered the pure
16090 procedure via a USE statement. */
16091 bool saw_sym
= false;
16092 if (sym
->ns
->use_stmts
)
16095 for (r
= sym
->ns
->use_stmts
->rename
; r
; r
= r
->next
)
16096 if (strcmp(r
->use_name
, sym
->name
) == 0) saw_sym
= true;
16102 gfc_error ("COMMON block member %qs at %L cannot be an "
16103 "EQUIVALENCE object in the pure procedure %qs",
16104 sym
->name
, &e
->where
, sym
->ns
->proc_name
->name
);
16108 /* Shall not be a named constant. */
16109 if (e
->expr_type
== EXPR_CONSTANT
)
16111 gfc_error ("Named constant %qs at %L cannot be an EQUIVALENCE "
16112 "object", sym
->name
, &e
->where
);
16116 if (e
->ts
.type
== BT_DERIVED
16117 && !resolve_equivalence_derived (e
->ts
.u
.derived
, sym
, e
))
16120 /* Check that the types correspond correctly:
16122 A numeric sequence structure may be equivalenced to another sequence
16123 structure, an object of default integer type, default real type, double
16124 precision real type, default logical type such that components of the
16125 structure ultimately only become associated to objects of the same
16126 kind. A character sequence structure may be equivalenced to an object
16127 of default character kind or another character sequence structure.
16128 Other objects may be equivalenced only to objects of the same type and
16129 kind parameters. */
16131 /* Identical types are unconditionally OK. */
16132 if (object
== 1 || gfc_compare_types (last_ts
, &sym
->ts
))
16133 goto identical_types
;
16135 last_eq_type
= sequence_type (*last_ts
);
16136 eq_type
= sequence_type (sym
->ts
);
16138 /* Since the pair of objects is not of the same type, mixed or
16139 non-default sequences can be rejected. */
16141 msg
= "Sequence %s with mixed components in EQUIVALENCE "
16142 "statement at %L with different type objects";
16144 && last_eq_type
== SEQ_MIXED
16145 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16146 || (eq_type
== SEQ_MIXED
16147 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16150 msg
= "Non-default type object or sequence %s in EQUIVALENCE "
16151 "statement at %L with objects of different type";
16153 && last_eq_type
== SEQ_NONDEFAULT
16154 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16155 || (eq_type
== SEQ_NONDEFAULT
16156 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16159 msg
="Non-CHARACTER object %qs in default CHARACTER "
16160 "EQUIVALENCE statement at %L";
16161 if (last_eq_type
== SEQ_CHARACTER
16162 && eq_type
!= SEQ_CHARACTER
16163 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16166 msg
="Non-NUMERIC object %qs in default NUMERIC "
16167 "EQUIVALENCE statement at %L";
16168 if (last_eq_type
== SEQ_NUMERIC
16169 && eq_type
!= SEQ_NUMERIC
16170 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16175 last_where
= &e
->where
;
16180 /* Shall not be an automatic array. */
16181 if (e
->ref
->type
== REF_ARRAY
16182 && !gfc_resolve_array_spec (e
->ref
->u
.ar
.as
, 1))
16184 gfc_error ("Array %qs at %L with non-constant bounds cannot be "
16185 "an EQUIVALENCE object", sym
->name
, &e
->where
);
16192 /* Shall not be a structure component. */
16193 if (r
->type
== REF_COMPONENT
)
16195 gfc_error ("Structure component %qs at %L cannot be an "
16196 "EQUIVALENCE object",
16197 r
->u
.c
.component
->name
, &e
->where
);
16201 /* A substring shall not have length zero. */
16202 if (r
->type
== REF_SUBSTRING
)
16204 if (compare_bound (r
->u
.ss
.start
, r
->u
.ss
.end
) == CMP_GT
)
16206 gfc_error ("Substring at %L has length zero",
16207 &r
->u
.ss
.start
->where
);
16217 /* Function called by resolve_fntype to flag other symbol used in the
16218 length type parameter specification of function resuls. */
16221 flag_fn_result_spec (gfc_expr
*expr
,
16223 int *f ATTRIBUTE_UNUSED
)
16228 if (expr
->expr_type
== EXPR_VARIABLE
)
16230 s
= expr
->symtree
->n
.sym
;
16231 for (ns
= s
->ns
; ns
; ns
= ns
->parent
)
16237 gfc_error ("Self reference in character length expression "
16238 "for %qs at %L", sym
->name
, &expr
->where
);
16242 if (!s
->fn_result_spec
16243 && s
->attr
.flavor
== FL_PARAMETER
)
16245 /* Function contained in a module.... */
16246 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_MODULE
)
16249 s
->fn_result_spec
= 1;
16250 /* Make sure that this symbol is translated as a module
16252 st
= gfc_get_unique_symtree (ns
);
16256 /* ... which is use associated and called. */
16257 else if (s
->attr
.use_assoc
|| s
->attr
.used_in_submodule
16259 /* External function matched with an interface. */
16262 && s
->ns
->proc_name
->attr
.if_source
== IFSRC_DECL
)
16263 || s
->ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16264 && s
->ns
->proc_name
->attr
.function
))
16265 s
->fn_result_spec
= 1;
16272 /* Resolve function and ENTRY types, issue diagnostics if needed. */
16275 resolve_fntype (gfc_namespace
*ns
)
16277 gfc_entry_list
*el
;
16280 if (ns
->proc_name
== NULL
|| !ns
->proc_name
->attr
.function
)
16283 /* If there are any entries, ns->proc_name is the entry master
16284 synthetic symbol and ns->entries->sym actual FUNCTION symbol. */
16286 sym
= ns
->entries
->sym
;
16288 sym
= ns
->proc_name
;
16289 if (sym
->result
== sym
16290 && sym
->ts
.type
== BT_UNKNOWN
16291 && !gfc_set_default_type (sym
, 0, NULL
)
16292 && !sym
->attr
.untyped
)
16294 gfc_error ("Function %qs at %L has no IMPLICIT type",
16295 sym
->name
, &sym
->declared_at
);
16296 sym
->attr
.untyped
= 1;
16299 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->ts
.u
.derived
->attr
.use_assoc
16300 && !sym
->attr
.contained
16301 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
16302 && gfc_check_symbol_access (sym
))
16304 gfc_notify_std (GFC_STD_F2003
, "PUBLIC function %qs at "
16305 "%L of PRIVATE type %qs", sym
->name
,
16306 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
16310 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
16312 if (el
->sym
->result
== el
->sym
16313 && el
->sym
->ts
.type
== BT_UNKNOWN
16314 && !gfc_set_default_type (el
->sym
, 0, NULL
)
16315 && !el
->sym
->attr
.untyped
)
16317 gfc_error ("ENTRY %qs at %L has no IMPLICIT type",
16318 el
->sym
->name
, &el
->sym
->declared_at
);
16319 el
->sym
->attr
.untyped
= 1;
16323 if (sym
->ts
.type
== BT_CHARACTER
)
16324 gfc_traverse_expr (sym
->ts
.u
.cl
->length
, sym
, flag_fn_result_spec
, 0);
16328 /* 12.3.2.1.1 Defined operators. */
16331 check_uop_procedure (gfc_symbol
*sym
, locus where
)
16333 gfc_formal_arglist
*formal
;
16335 if (!sym
->attr
.function
)
16337 gfc_error ("User operator procedure %qs at %L must be a FUNCTION",
16338 sym
->name
, &where
);
16342 if (sym
->ts
.type
== BT_CHARACTER
16343 && !((sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
) || sym
->ts
.deferred
)
16344 && !(sym
->result
&& ((sym
->result
->ts
.u
.cl
16345 && sym
->result
->ts
.u
.cl
->length
) || sym
->result
->ts
.deferred
)))
16347 gfc_error ("User operator procedure %qs at %L cannot be assumed "
16348 "character length", sym
->name
, &where
);
16352 formal
= gfc_sym_get_dummy_args (sym
);
16353 if (!formal
|| !formal
->sym
)
16355 gfc_error ("User operator procedure %qs at %L must have at least "
16356 "one argument", sym
->name
, &where
);
16360 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16362 gfc_error ("First argument of operator interface at %L must be "
16363 "INTENT(IN)", &where
);
16367 if (formal
->sym
->attr
.optional
)
16369 gfc_error ("First argument of operator interface at %L cannot be "
16370 "optional", &where
);
16374 formal
= formal
->next
;
16375 if (!formal
|| !formal
->sym
)
16378 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16380 gfc_error ("Second argument of operator interface at %L must be "
16381 "INTENT(IN)", &where
);
16385 if (formal
->sym
->attr
.optional
)
16387 gfc_error ("Second argument of operator interface at %L cannot be "
16388 "optional", &where
);
16394 gfc_error ("Operator interface at %L must have, at most, two "
16395 "arguments", &where
);
16403 gfc_resolve_uops (gfc_symtree
*symtree
)
16405 gfc_interface
*itr
;
16407 if (symtree
== NULL
)
16410 gfc_resolve_uops (symtree
->left
);
16411 gfc_resolve_uops (symtree
->right
);
16413 for (itr
= symtree
->n
.uop
->op
; itr
; itr
= itr
->next
)
16414 check_uop_procedure (itr
->sym
, itr
->sym
->declared_at
);
16418 /* Examine all of the expressions associated with a program unit,
16419 assign types to all intermediate expressions, make sure that all
16420 assignments are to compatible types and figure out which names
16421 refer to which functions or subroutines. It doesn't check code
16422 block, which is handled by gfc_resolve_code. */
16425 resolve_types (gfc_namespace
*ns
)
16431 gfc_namespace
* old_ns
= gfc_current_ns
;
16433 if (ns
->types_resolved
)
16436 /* Check that all IMPLICIT types are ok. */
16437 if (!ns
->seen_implicit_none
)
16440 for (letter
= 0; letter
!= GFC_LETTERS
; ++letter
)
16441 if (ns
->set_flag
[letter
]
16442 && !resolve_typespec_used (&ns
->default_type
[letter
],
16443 &ns
->implicit_loc
[letter
], NULL
))
16447 gfc_current_ns
= ns
;
16449 resolve_entries (ns
);
16451 resolve_common_vars (&ns
->blank_common
, false);
16452 resolve_common_blocks (ns
->common_root
);
16454 resolve_contained_functions (ns
);
16456 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
16457 && ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16458 resolve_formal_arglist (ns
->proc_name
);
16460 gfc_traverse_ns (ns
, resolve_bind_c_derived_types
);
16462 for (cl
= ns
->cl_list
; cl
; cl
= cl
->next
)
16463 resolve_charlen (cl
);
16465 gfc_traverse_ns (ns
, resolve_symbol
);
16467 resolve_fntype (ns
);
16469 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16471 if (gfc_pure (ns
->proc_name
) && !gfc_pure (n
->proc_name
))
16472 gfc_error ("Contained procedure %qs at %L of a PURE procedure must "
16473 "also be PURE", n
->proc_name
->name
,
16474 &n
->proc_name
->declared_at
);
16480 gfc_do_concurrent_flag
= 0;
16481 gfc_check_interfaces (ns
);
16483 gfc_traverse_ns (ns
, resolve_values
);
16489 for (d
= ns
->data
; d
; d
= d
->next
)
16493 gfc_traverse_ns (ns
, gfc_formalize_init_value
);
16495 gfc_traverse_ns (ns
, gfc_verify_binding_labels
);
16497 for (eq
= ns
->equiv
; eq
; eq
= eq
->next
)
16498 resolve_equivalence (eq
);
16500 /* Warn about unused labels. */
16501 if (warn_unused_label
)
16502 warn_unused_fortran_label (ns
->st_labels
);
16504 gfc_resolve_uops (ns
->uop_root
);
16506 gfc_traverse_ns (ns
, gfc_verify_DTIO_procedures
);
16508 gfc_resolve_omp_declare_simd (ns
);
16510 gfc_resolve_omp_udrs (ns
->omp_udr_root
);
16512 ns
->types_resolved
= 1;
16514 gfc_current_ns
= old_ns
;
16518 /* Call gfc_resolve_code recursively. */
16521 resolve_codes (gfc_namespace
*ns
)
16524 bitmap_obstack old_obstack
;
16526 if (ns
->resolved
== 1)
16529 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16532 gfc_current_ns
= ns
;
16534 /* Don't clear 'cs_base' if this is the namespace of a BLOCK construct. */
16535 if (!(ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_LABEL
))
16538 /* Set to an out of range value. */
16539 current_entry_id
= -1;
16541 old_obstack
= labels_obstack
;
16542 bitmap_obstack_initialize (&labels_obstack
);
16544 gfc_resolve_oacc_declare (ns
);
16545 gfc_resolve_omp_local_vars (ns
);
16546 gfc_resolve_code (ns
->code
, ns
);
16548 bitmap_obstack_release (&labels_obstack
);
16549 labels_obstack
= old_obstack
;
16553 /* This function is called after a complete program unit has been compiled.
16554 Its purpose is to examine all of the expressions associated with a program
16555 unit, assign types to all intermediate expressions, make sure that all
16556 assignments are to compatible types and figure out which names refer to
16557 which functions or subroutines. */
16560 gfc_resolve (gfc_namespace
*ns
)
16562 gfc_namespace
*old_ns
;
16563 code_stack
*old_cs_base
;
16564 struct gfc_omp_saved_state old_omp_state
;
16570 old_ns
= gfc_current_ns
;
16571 old_cs_base
= cs_base
;
16573 /* As gfc_resolve can be called during resolution of an OpenMP construct
16574 body, we should clear any state associated to it, so that say NS's
16575 DO loops are not interpreted as OpenMP loops. */
16576 if (!ns
->construct_entities
)
16577 gfc_omp_save_and_clear_state (&old_omp_state
);
16579 resolve_types (ns
);
16580 component_assignment_level
= 0;
16581 resolve_codes (ns
);
16583 gfc_current_ns
= old_ns
;
16584 cs_base
= old_cs_base
;
16587 gfc_run_passes (ns
);
16589 if (!ns
->construct_entities
)
16590 gfc_omp_restore_state (&old_omp_state
);