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 2008 Draft Standard, page 535, C418, on type-param-value
605 type, lists the only ways a character length value of * can be used:
606 dummy arguments of procedures, named constants, function results and
607 in allocate statements if the allocate_object is an assumed length dummy
608 in external functions. Internal function results and results of module
609 procedures are not on this list, ergo, not permitted. */
611 if (sym
->result
->ts
.type
== BT_CHARACTER
)
613 gfc_charlen
*cl
= sym
->result
->ts
.u
.cl
;
614 if ((!cl
|| !cl
->length
) && !sym
->result
->ts
.deferred
)
616 /* See if this is a module-procedure and adapt error message
619 gcc_assert (ns
->parent
&& ns
->parent
->proc_name
);
620 module_proc
= (ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
);
622 gfc_error (module_proc
623 ? G_("Character-valued module procedure %qs at %L"
624 " must not be assumed length")
625 : G_("Character-valued internal function %qs at %L"
626 " must not be assumed length"),
627 sym
->name
, &sym
->declared_at
);
633 /* Add NEW_ARGS to the formal argument list of PROC, taking care not to
634 introduce duplicates. */
637 merge_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
639 gfc_formal_arglist
*f
, *new_arglist
;
642 for (; new_args
!= NULL
; new_args
= new_args
->next
)
644 new_sym
= new_args
->sym
;
645 /* See if this arg is already in the formal argument list. */
646 for (f
= proc
->formal
; f
; f
= f
->next
)
648 if (new_sym
== f
->sym
)
655 /* Add a new argument. Argument order is not important. */
656 new_arglist
= gfc_get_formal_arglist ();
657 new_arglist
->sym
= new_sym
;
658 new_arglist
->next
= proc
->formal
;
659 proc
->formal
= new_arglist
;
664 /* Flag the arguments that are not present in all entries. */
667 check_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
669 gfc_formal_arglist
*f
, *head
;
672 for (f
= proc
->formal
; f
; f
= f
->next
)
677 for (new_args
= head
; new_args
; new_args
= new_args
->next
)
679 if (new_args
->sym
== f
->sym
)
686 f
->sym
->attr
.not_always_present
= 1;
691 /* Resolve alternate entry points. If a symbol has multiple entry points we
692 create a new master symbol for the main routine, and turn the existing
693 symbol into an entry point. */
696 resolve_entries (gfc_namespace
*ns
)
698 gfc_namespace
*old_ns
;
702 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
703 static int master_count
= 0;
705 if (ns
->proc_name
== NULL
)
708 /* No need to do anything if this procedure doesn't have alternate entry
713 /* We may already have resolved alternate entry points. */
714 if (ns
->proc_name
->attr
.entry_master
)
717 /* If this isn't a procedure something has gone horribly wrong. */
718 gcc_assert (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
);
720 /* Remember the current namespace. */
721 old_ns
= gfc_current_ns
;
725 /* Add the main entry point to the list of entry points. */
726 el
= gfc_get_entry_list ();
727 el
->sym
= ns
->proc_name
;
729 el
->next
= ns
->entries
;
731 ns
->proc_name
->attr
.entry
= 1;
733 /* If it is a module function, it needs to be in the right namespace
734 so that gfc_get_fake_result_decl can gather up the results. The
735 need for this arose in get_proc_name, where these beasts were
736 left in their own namespace, to keep prior references linked to
737 the entry declaration.*/
738 if (ns
->proc_name
->attr
.function
739 && ns
->parent
&& ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
742 /* Do the same for entries where the master is not a module
743 procedure. These are retained in the module namespace because
744 of the module procedure declaration. */
745 for (el
= el
->next
; el
; el
= el
->next
)
746 if (el
->sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
747 && el
->sym
->attr
.mod_proc
)
751 /* Add an entry statement for it. */
752 c
= gfc_get_code (EXEC_ENTRY
);
757 /* Create a new symbol for the master function. */
758 /* Give the internal function a unique name (within this file).
759 Also include the function name so the user has some hope of figuring
760 out what is going on. */
761 snprintf (name
, GFC_MAX_SYMBOL_LEN
, "master.%d.%s",
762 master_count
++, ns
->proc_name
->name
);
763 gfc_get_ha_symbol (name
, &proc
);
764 gcc_assert (proc
!= NULL
);
766 gfc_add_procedure (&proc
->attr
, PROC_INTERNAL
, proc
->name
, NULL
);
767 if (ns
->proc_name
->attr
.subroutine
)
768 gfc_add_subroutine (&proc
->attr
, proc
->name
, NULL
);
772 gfc_typespec
*ts
, *fts
;
773 gfc_array_spec
*as
, *fas
;
774 gfc_add_function (&proc
->attr
, proc
->name
, NULL
);
776 fas
= ns
->entries
->sym
->as
;
777 fas
= fas
? fas
: ns
->entries
->sym
->result
->as
;
778 fts
= &ns
->entries
->sym
->result
->ts
;
779 if (fts
->type
== BT_UNKNOWN
)
780 fts
= gfc_get_default_type (ns
->entries
->sym
->result
->name
, NULL
);
781 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
783 ts
= &el
->sym
->result
->ts
;
785 as
= as
? as
: el
->sym
->result
->as
;
786 if (ts
->type
== BT_UNKNOWN
)
787 ts
= gfc_get_default_type (el
->sym
->result
->name
, NULL
);
789 if (! gfc_compare_types (ts
, fts
)
790 || (el
->sym
->result
->attr
.dimension
791 != ns
->entries
->sym
->result
->attr
.dimension
)
792 || (el
->sym
->result
->attr
.pointer
793 != ns
->entries
->sym
->result
->attr
.pointer
))
795 else if (as
&& fas
&& ns
->entries
->sym
->result
!= el
->sym
->result
796 && gfc_compare_array_spec (as
, fas
) == 0)
797 gfc_error ("Function %s at %L has entries with mismatched "
798 "array specifications", ns
->entries
->sym
->name
,
799 &ns
->entries
->sym
->declared_at
);
800 /* The characteristics need to match and thus both need to have
801 the same string length, i.e. both len=*, or both len=4.
802 Having both len=<variable> is also possible, but difficult to
803 check at compile time. */
804 else if (ts
->type
== BT_CHARACTER
&& ts
->u
.cl
&& fts
->u
.cl
805 && (((ts
->u
.cl
->length
&& !fts
->u
.cl
->length
)
806 ||(!ts
->u
.cl
->length
&& fts
->u
.cl
->length
))
808 && ts
->u
.cl
->length
->expr_type
809 != fts
->u
.cl
->length
->expr_type
)
811 && ts
->u
.cl
->length
->expr_type
== EXPR_CONSTANT
812 && mpz_cmp (ts
->u
.cl
->length
->value
.integer
,
813 fts
->u
.cl
->length
->value
.integer
) != 0)))
814 gfc_notify_std (GFC_STD_GNU
, "Function %s at %L with "
815 "entries returning variables of different "
816 "string lengths", ns
->entries
->sym
->name
,
817 &ns
->entries
->sym
->declared_at
);
822 sym
= ns
->entries
->sym
->result
;
823 /* All result types the same. */
825 if (sym
->attr
.dimension
)
826 gfc_set_array_spec (proc
, gfc_copy_array_spec (sym
->as
), NULL
);
827 if (sym
->attr
.pointer
)
828 gfc_add_pointer (&proc
->attr
, NULL
);
832 /* Otherwise the result will be passed through a union by
834 proc
->attr
.mixed_entry_master
= 1;
835 for (el
= ns
->entries
; el
; el
= el
->next
)
837 sym
= el
->sym
->result
;
838 if (sym
->attr
.dimension
)
840 if (el
== ns
->entries
)
841 gfc_error ("FUNCTION result %s can't be an array in "
842 "FUNCTION %s at %L", sym
->name
,
843 ns
->entries
->sym
->name
, &sym
->declared_at
);
845 gfc_error ("ENTRY result %s can't be an array in "
846 "FUNCTION %s at %L", sym
->name
,
847 ns
->entries
->sym
->name
, &sym
->declared_at
);
849 else if (sym
->attr
.pointer
)
851 if (el
== ns
->entries
)
852 gfc_error ("FUNCTION result %s can't be a POINTER in "
853 "FUNCTION %s at %L", sym
->name
,
854 ns
->entries
->sym
->name
, &sym
->declared_at
);
856 gfc_error ("ENTRY result %s can't be a POINTER in "
857 "FUNCTION %s at %L", sym
->name
,
858 ns
->entries
->sym
->name
, &sym
->declared_at
);
863 if (ts
->type
== BT_UNKNOWN
)
864 ts
= gfc_get_default_type (sym
->name
, NULL
);
868 if (ts
->kind
== gfc_default_integer_kind
)
872 if (ts
->kind
== gfc_default_real_kind
873 || ts
->kind
== gfc_default_double_kind
)
877 if (ts
->kind
== gfc_default_complex_kind
)
881 if (ts
->kind
== gfc_default_logical_kind
)
885 /* We will issue error elsewhere. */
893 if (el
== ns
->entries
)
894 gfc_error ("FUNCTION result %s can't be of type %s "
895 "in FUNCTION %s at %L", sym
->name
,
896 gfc_typename (ts
), ns
->entries
->sym
->name
,
899 gfc_error ("ENTRY result %s can't be of type %s "
900 "in FUNCTION %s at %L", sym
->name
,
901 gfc_typename (ts
), ns
->entries
->sym
->name
,
908 proc
->attr
.access
= ACCESS_PRIVATE
;
909 proc
->attr
.entry_master
= 1;
911 /* Merge all the entry point arguments. */
912 for (el
= ns
->entries
; el
; el
= el
->next
)
913 merge_argument_lists (proc
, el
->sym
->formal
);
915 /* Check the master formal arguments for any that are not
916 present in all entry points. */
917 for (el
= ns
->entries
; el
; el
= el
->next
)
918 check_argument_lists (proc
, el
->sym
->formal
);
920 /* Use the master function for the function body. */
921 ns
->proc_name
= proc
;
923 /* Finalize the new symbols. */
924 gfc_commit_symbols ();
926 /* Restore the original namespace. */
927 gfc_current_ns
= old_ns
;
931 /* Resolve common variables. */
933 resolve_common_vars (gfc_common_head
*common_block
, bool named_common
)
935 gfc_symbol
*csym
= common_block
->head
;
937 for (; csym
; csym
= csym
->common_next
)
939 /* gfc_add_in_common may have been called before, but the reported errors
940 have been ignored to continue parsing.
941 We do the checks again here. */
942 if (!csym
->attr
.use_assoc
)
943 gfc_add_in_common (&csym
->attr
, csym
->name
, &common_block
->where
);
945 if (csym
->value
|| csym
->attr
.data
)
947 if (!csym
->ns
->is_block_data
)
948 gfc_notify_std (GFC_STD_GNU
, "Variable %qs at %L is in COMMON "
949 "but only in BLOCK DATA initialization is "
950 "allowed", csym
->name
, &csym
->declared_at
);
951 else if (!named_common
)
952 gfc_notify_std (GFC_STD_GNU
, "Initialized variable %qs at %L is "
953 "in a blank COMMON but initialization is only "
954 "allowed in named common blocks", csym
->name
,
958 if (UNLIMITED_POLY (csym
))
959 gfc_error_now ("%qs in cannot appear in COMMON at %L "
960 "[F2008:C5100]", csym
->name
, &csym
->declared_at
);
962 if (csym
->ts
.type
!= BT_DERIVED
)
965 if (!(csym
->ts
.u
.derived
->attr
.sequence
966 || csym
->ts
.u
.derived
->attr
.is_bind_c
))
967 gfc_error_now ("Derived type variable %qs in COMMON at %L "
968 "has neither the SEQUENCE nor the BIND(C) "
969 "attribute", csym
->name
, &csym
->declared_at
);
970 if (csym
->ts
.u
.derived
->attr
.alloc_comp
)
971 gfc_error_now ("Derived type variable %qs in COMMON at %L "
972 "has an ultimate component that is "
973 "allocatable", csym
->name
, &csym
->declared_at
);
974 if (gfc_has_default_initializer (csym
->ts
.u
.derived
))
975 gfc_error_now ("Derived type variable %qs in COMMON at %L "
976 "may not have default initializer", csym
->name
,
979 if (csym
->attr
.flavor
== FL_UNKNOWN
&& !csym
->attr
.proc_pointer
)
980 gfc_add_flavor (&csym
->attr
, FL_VARIABLE
, csym
->name
, &csym
->declared_at
);
984 /* Resolve common blocks. */
986 resolve_common_blocks (gfc_symtree
*common_root
)
991 if (common_root
== NULL
)
994 if (common_root
->left
)
995 resolve_common_blocks (common_root
->left
);
996 if (common_root
->right
)
997 resolve_common_blocks (common_root
->right
);
999 resolve_common_vars (common_root
->n
.common
, true);
1001 if (!gfc_notify_std (GFC_STD_F2018_OBS
, "COMMON block at %L",
1002 &common_root
->n
.common
->where
))
1005 /* The common name is a global name - in Fortran 2003 also if it has a
1006 C binding name, since Fortran 2008 only the C binding name is a global
1008 if (!common_root
->n
.common
->binding_label
1009 || gfc_notification_std (GFC_STD_F2008
))
1011 gsym
= gfc_find_gsymbol (gfc_gsym_root
,
1012 common_root
->n
.common
->name
);
1014 if (gsym
&& gfc_notification_std (GFC_STD_F2008
)
1015 && gsym
->type
== GSYM_COMMON
1016 && ((common_root
->n
.common
->binding_label
1017 && (!gsym
->binding_label
1018 || strcmp (common_root
->n
.common
->binding_label
,
1019 gsym
->binding_label
) != 0))
1020 || (!common_root
->n
.common
->binding_label
1021 && gsym
->binding_label
)))
1023 gfc_error ("In Fortran 2003 COMMON %qs block at %L is a global "
1024 "identifier and must thus have the same binding name "
1025 "as the same-named COMMON block at %L: %s vs %s",
1026 common_root
->n
.common
->name
, &common_root
->n
.common
->where
,
1028 common_root
->n
.common
->binding_label
1029 ? common_root
->n
.common
->binding_label
: "(blank)",
1030 gsym
->binding_label
? gsym
->binding_label
: "(blank)");
1034 if (gsym
&& gsym
->type
!= GSYM_COMMON
1035 && !common_root
->n
.common
->binding_label
)
1037 gfc_error ("COMMON block %qs at %L uses the same global identifier "
1039 common_root
->n
.common
->name
, &common_root
->n
.common
->where
,
1043 if (gsym
&& gsym
->type
!= GSYM_COMMON
)
1045 gfc_error ("Fortran 2008: COMMON block %qs with binding label at "
1046 "%L sharing the identifier with global non-COMMON-block "
1047 "entity at %L", common_root
->n
.common
->name
,
1048 &common_root
->n
.common
->where
, &gsym
->where
);
1053 gsym
= gfc_get_gsymbol (common_root
->n
.common
->name
);
1054 gsym
->type
= GSYM_COMMON
;
1055 gsym
->where
= common_root
->n
.common
->where
;
1061 if (common_root
->n
.common
->binding_label
)
1063 gsym
= gfc_find_gsymbol (gfc_gsym_root
,
1064 common_root
->n
.common
->binding_label
);
1065 if (gsym
&& gsym
->type
!= GSYM_COMMON
)
1067 gfc_error ("COMMON block at %L with binding label %qs uses the same "
1068 "global identifier as entity at %L",
1069 &common_root
->n
.common
->where
,
1070 common_root
->n
.common
->binding_label
, &gsym
->where
);
1075 gsym
= gfc_get_gsymbol (common_root
->n
.common
->binding_label
);
1076 gsym
->type
= GSYM_COMMON
;
1077 gsym
->where
= common_root
->n
.common
->where
;
1083 gfc_find_symbol (common_root
->name
, gfc_current_ns
, 0, &sym
);
1087 if (sym
->attr
.flavor
== FL_PARAMETER
)
1088 gfc_error ("COMMON block %qs at %L is used as PARAMETER at %L",
1089 sym
->name
, &common_root
->n
.common
->where
, &sym
->declared_at
);
1091 if (sym
->attr
.external
)
1092 gfc_error ("COMMON block %qs at %L can not have the EXTERNAL attribute",
1093 sym
->name
, &common_root
->n
.common
->where
);
1095 if (sym
->attr
.intrinsic
)
1096 gfc_error ("COMMON block %qs at %L is also an intrinsic procedure",
1097 sym
->name
, &common_root
->n
.common
->where
);
1098 else if (sym
->attr
.result
1099 || gfc_is_function_return_value (sym
, gfc_current_ns
))
1100 gfc_notify_std (GFC_STD_F2003
, "COMMON block %qs at %L "
1101 "that is also a function result", sym
->name
,
1102 &common_root
->n
.common
->where
);
1103 else if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.proc
!= PROC_INTERNAL
1104 && sym
->attr
.proc
!= PROC_ST_FUNCTION
)
1105 gfc_notify_std (GFC_STD_F2003
, "COMMON block %qs at %L "
1106 "that is also a global procedure", sym
->name
,
1107 &common_root
->n
.common
->where
);
1111 /* Resolve contained function types. Because contained functions can call one
1112 another, they have to be worked out before any of the contained procedures
1115 The good news is that if a function doesn't already have a type, the only
1116 way it can get one is through an IMPLICIT type or a RESULT variable, because
1117 by definition contained functions are contained namespace they're contained
1118 in, not in a sibling or parent namespace. */
1121 resolve_contained_functions (gfc_namespace
*ns
)
1123 gfc_namespace
*child
;
1126 resolve_formal_arglists (ns
);
1128 for (child
= ns
->contained
; child
; child
= child
->sibling
)
1130 /* Resolve alternate entry points first. */
1131 resolve_entries (child
);
1133 /* Then check function return types. */
1134 resolve_contained_fntype (child
->proc_name
, child
);
1135 for (el
= child
->entries
; el
; el
= el
->next
)
1136 resolve_contained_fntype (el
->sym
, child
);
1142 /* A Parameterized Derived Type constructor must contain values for
1143 the PDT KIND parameters or they must have a default initializer.
1144 Go through the constructor picking out the KIND expressions,
1145 storing them in 'param_list' and then call gfc_get_pdt_instance
1146 to obtain the PDT instance. */
1148 static gfc_actual_arglist
*param_list
, *param_tail
, *param
;
1151 get_pdt_spec_expr (gfc_component
*c
, gfc_expr
*expr
)
1153 param
= gfc_get_actual_arglist ();
1155 param_list
= param_tail
= param
;
1158 param_tail
->next
= param
;
1159 param_tail
= param_tail
->next
;
1162 param_tail
->name
= c
->name
;
1164 param_tail
->expr
= gfc_copy_expr (expr
);
1165 else if (c
->initializer
)
1166 param_tail
->expr
= gfc_copy_expr (c
->initializer
);
1169 param_tail
->spec_type
= SPEC_ASSUMED
;
1170 if (c
->attr
.pdt_kind
)
1172 gfc_error ("The KIND parameter %qs in the PDT constructor "
1173 "at %C has no value", param
->name
);
1182 get_pdt_constructor (gfc_expr
*expr
, gfc_constructor
**constr
,
1183 gfc_symbol
*derived
)
1185 gfc_constructor
*cons
= NULL
;
1186 gfc_component
*comp
;
1189 if (expr
&& expr
->expr_type
== EXPR_STRUCTURE
)
1190 cons
= gfc_constructor_first (expr
->value
.constructor
);
1195 comp
= derived
->components
;
1197 for (; comp
&& cons
; comp
= comp
->next
, cons
= gfc_constructor_next (cons
))
1200 && cons
->expr
->expr_type
== EXPR_STRUCTURE
1201 && comp
->ts
.type
== BT_DERIVED
)
1203 t
= get_pdt_constructor (cons
->expr
, NULL
, comp
->ts
.u
.derived
);
1207 else if (comp
->ts
.type
== BT_DERIVED
)
1209 t
= get_pdt_constructor (NULL
, &cons
, comp
->ts
.u
.derived
);
1213 else if ((comp
->attr
.pdt_kind
|| comp
->attr
.pdt_len
)
1214 && derived
->attr
.pdt_template
)
1216 t
= get_pdt_spec_expr (comp
, cons
->expr
);
1225 static bool resolve_fl_derived0 (gfc_symbol
*sym
);
1226 static bool resolve_fl_struct (gfc_symbol
*sym
);
1229 /* Resolve all of the elements of a structure constructor and make sure that
1230 the types are correct. The 'init' flag indicates that the given
1231 constructor is an initializer. */
1234 resolve_structure_cons (gfc_expr
*expr
, int init
)
1236 gfc_constructor
*cons
;
1237 gfc_component
*comp
;
1243 if (expr
->ts
.type
== BT_DERIVED
|| expr
->ts
.type
== BT_UNION
)
1245 if (expr
->ts
.u
.derived
->attr
.flavor
== FL_DERIVED
)
1246 resolve_fl_derived0 (expr
->ts
.u
.derived
);
1248 resolve_fl_struct (expr
->ts
.u
.derived
);
1250 /* If this is a Parameterized Derived Type template, find the
1251 instance corresponding to the PDT kind parameters. */
1252 if (expr
->ts
.u
.derived
->attr
.pdt_template
)
1255 t
= get_pdt_constructor (expr
, NULL
, expr
->ts
.u
.derived
);
1258 gfc_get_pdt_instance (param_list
, &expr
->ts
.u
.derived
, NULL
);
1260 expr
->param_list
= gfc_copy_actual_arglist (param_list
);
1263 gfc_free_actual_arglist (param_list
);
1265 if (!expr
->ts
.u
.derived
->attr
.pdt_type
)
1270 cons
= gfc_constructor_first (expr
->value
.constructor
);
1272 /* A constructor may have references if it is the result of substituting a
1273 parameter variable. In this case we just pull out the component we
1276 comp
= expr
->ref
->u
.c
.sym
->components
;
1278 comp
= expr
->ts
.u
.derived
->components
;
1280 for (; comp
&& cons
; comp
= comp
->next
, cons
= gfc_constructor_next (cons
))
1287 /* Unions use an EXPR_NULL contrived expression to tell the translation
1288 phase to generate an initializer of the appropriate length.
1290 if (cons
->expr
->ts
.type
== BT_UNION
&& cons
->expr
->expr_type
== EXPR_NULL
)
1293 if (!gfc_resolve_expr (cons
->expr
))
1299 rank
= comp
->as
? comp
->as
->rank
: 0;
1300 if (comp
->ts
.type
== BT_CLASS
1301 && !comp
->ts
.u
.derived
->attr
.unlimited_polymorphic
1302 && CLASS_DATA (comp
)->as
)
1303 rank
= CLASS_DATA (comp
)->as
->rank
;
1305 if (cons
->expr
->expr_type
!= EXPR_NULL
&& rank
!= cons
->expr
->rank
1306 && (comp
->attr
.allocatable
|| cons
->expr
->rank
))
1308 gfc_error ("The rank of the element in the structure "
1309 "constructor at %L does not match that of the "
1310 "component (%d/%d)", &cons
->expr
->where
,
1311 cons
->expr
->rank
, rank
);
1315 /* If we don't have the right type, try to convert it. */
1317 if (!comp
->attr
.proc_pointer
&&
1318 !gfc_compare_types (&cons
->expr
->ts
, &comp
->ts
))
1320 if (strcmp (comp
->name
, "_extends") == 0)
1322 /* Can afford to be brutal with the _extends initializer.
1323 The derived type can get lost because it is PRIVATE
1324 but it is not usage constrained by the standard. */
1325 cons
->expr
->ts
= comp
->ts
;
1327 else if (comp
->attr
.pointer
&& cons
->expr
->ts
.type
!= BT_UNKNOWN
)
1329 gfc_error ("The element in the structure constructor at %L, "
1330 "for pointer component %qs, is %s but should be %s",
1331 &cons
->expr
->where
, comp
->name
,
1332 gfc_basic_typename (cons
->expr
->ts
.type
),
1333 gfc_basic_typename (comp
->ts
.type
));
1338 bool t2
= gfc_convert_type (cons
->expr
, &comp
->ts
, 1);
1344 /* For strings, the length of the constructor should be the same as
1345 the one of the structure, ensure this if the lengths are known at
1346 compile time and when we are dealing with PARAMETER or structure
1348 if (cons
->expr
->ts
.type
== BT_CHARACTER
&& comp
->ts
.u
.cl
1349 && comp
->ts
.u
.cl
->length
1350 && comp
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
1351 && cons
->expr
->ts
.u
.cl
&& cons
->expr
->ts
.u
.cl
->length
1352 && cons
->expr
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
1353 && cons
->expr
->rank
!= 0
1354 && mpz_cmp (cons
->expr
->ts
.u
.cl
->length
->value
.integer
,
1355 comp
->ts
.u
.cl
->length
->value
.integer
) != 0)
1357 if (cons
->expr
->expr_type
== EXPR_VARIABLE
1358 && cons
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
)
1360 /* Wrap the parameter in an array constructor (EXPR_ARRAY)
1361 to make use of the gfc_resolve_character_array_constructor
1362 machinery. The expression is later simplified away to
1363 an array of string literals. */
1364 gfc_expr
*para
= cons
->expr
;
1365 cons
->expr
= gfc_get_expr ();
1366 cons
->expr
->ts
= para
->ts
;
1367 cons
->expr
->where
= para
->where
;
1368 cons
->expr
->expr_type
= EXPR_ARRAY
;
1369 cons
->expr
->rank
= para
->rank
;
1370 cons
->expr
->shape
= gfc_copy_shape (para
->shape
, para
->rank
);
1371 gfc_constructor_append_expr (&cons
->expr
->value
.constructor
,
1372 para
, &cons
->expr
->where
);
1375 if (cons
->expr
->expr_type
== EXPR_ARRAY
)
1377 /* Rely on the cleanup of the namespace to deal correctly with
1378 the old charlen. (There was a block here that attempted to
1379 remove the charlen but broke the chain in so doing.) */
1380 cons
->expr
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1381 cons
->expr
->ts
.u
.cl
->length_from_typespec
= true;
1382 cons
->expr
->ts
.u
.cl
->length
= gfc_copy_expr (comp
->ts
.u
.cl
->length
);
1383 gfc_resolve_character_array_constructor (cons
->expr
);
1387 if (cons
->expr
->expr_type
== EXPR_NULL
1388 && !(comp
->attr
.pointer
|| comp
->attr
.allocatable
1389 || comp
->attr
.proc_pointer
|| comp
->ts
.f90_type
== BT_VOID
1390 || (comp
->ts
.type
== BT_CLASS
1391 && (CLASS_DATA (comp
)->attr
.class_pointer
1392 || CLASS_DATA (comp
)->attr
.allocatable
))))
1395 gfc_error ("The NULL in the structure constructor at %L is "
1396 "being applied to component %qs, which is neither "
1397 "a POINTER nor ALLOCATABLE", &cons
->expr
->where
,
1401 if (comp
->attr
.proc_pointer
&& comp
->ts
.interface
)
1403 /* Check procedure pointer interface. */
1404 gfc_symbol
*s2
= NULL
;
1409 c2
= gfc_get_proc_ptr_comp (cons
->expr
);
1412 s2
= c2
->ts
.interface
;
1415 else if (cons
->expr
->expr_type
== EXPR_FUNCTION
)
1417 s2
= cons
->expr
->symtree
->n
.sym
->result
;
1418 name
= cons
->expr
->symtree
->n
.sym
->result
->name
;
1420 else if (cons
->expr
->expr_type
!= EXPR_NULL
)
1422 s2
= cons
->expr
->symtree
->n
.sym
;
1423 name
= cons
->expr
->symtree
->n
.sym
->name
;
1426 if (s2
&& !gfc_compare_interfaces (comp
->ts
.interface
, s2
, name
, 0, 1,
1427 err
, sizeof (err
), NULL
, NULL
))
1429 gfc_error_opt (OPT_Wargument_mismatch
,
1430 "Interface mismatch for procedure-pointer "
1431 "component %qs in structure constructor at %L:"
1432 " %s", comp
->name
, &cons
->expr
->where
, err
);
1437 if (!comp
->attr
.pointer
|| comp
->attr
.proc_pointer
1438 || cons
->expr
->expr_type
== EXPR_NULL
)
1441 a
= gfc_expr_attr (cons
->expr
);
1443 if (!a
.pointer
&& !a
.target
)
1446 gfc_error ("The element in the structure constructor at %L, "
1447 "for pointer component %qs should be a POINTER or "
1448 "a TARGET", &cons
->expr
->where
, comp
->name
);
1453 /* F08:C461. Additional checks for pointer initialization. */
1457 gfc_error ("Pointer initialization target at %L "
1458 "must not be ALLOCATABLE", &cons
->expr
->where
);
1463 gfc_error ("Pointer initialization target at %L "
1464 "must have the SAVE attribute", &cons
->expr
->where
);
1468 /* F2003, C1272 (3). */
1469 bool impure
= cons
->expr
->expr_type
== EXPR_VARIABLE
1470 && (gfc_impure_variable (cons
->expr
->symtree
->n
.sym
)
1471 || gfc_is_coindexed (cons
->expr
));
1472 if (impure
&& gfc_pure (NULL
))
1475 gfc_error ("Invalid expression in the structure constructor for "
1476 "pointer component %qs at %L in PURE procedure",
1477 comp
->name
, &cons
->expr
->where
);
1481 gfc_unset_implicit_pure (NULL
);
1488 /****************** Expression name resolution ******************/
1490 /* Returns 0 if a symbol was not declared with a type or
1491 attribute declaration statement, nonzero otherwise. */
1494 was_declared (gfc_symbol
*sym
)
1500 if (!a
.implicit_type
&& sym
->ts
.type
!= BT_UNKNOWN
)
1503 if (a
.allocatable
|| a
.dimension
|| a
.dummy
|| a
.external
|| a
.intrinsic
1504 || a
.optional
|| a
.pointer
|| a
.save
|| a
.target
|| a
.volatile_
1505 || a
.value
|| a
.access
!= ACCESS_UNKNOWN
|| a
.intent
!= INTENT_UNKNOWN
1506 || a
.asynchronous
|| a
.codimension
)
1513 /* Determine if a symbol is generic or not. */
1516 generic_sym (gfc_symbol
*sym
)
1520 if (sym
->attr
.generic
||
1521 (sym
->attr
.intrinsic
&& gfc_generic_intrinsic (sym
->name
)))
1524 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1527 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1534 return generic_sym (s
);
1541 /* Determine if a symbol is specific or not. */
1544 specific_sym (gfc_symbol
*sym
)
1548 if (sym
->attr
.if_source
== IFSRC_IFBODY
1549 || sym
->attr
.proc
== PROC_MODULE
1550 || sym
->attr
.proc
== PROC_INTERNAL
1551 || sym
->attr
.proc
== PROC_ST_FUNCTION
1552 || (sym
->attr
.intrinsic
&& gfc_specific_intrinsic (sym
->name
))
1553 || sym
->attr
.external
)
1556 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1559 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1561 return (s
== NULL
) ? 0 : specific_sym (s
);
1565 /* Figure out if the procedure is specific, generic or unknown. */
1568 { PTYPE_GENERIC
= 1, PTYPE_SPECIFIC
, PTYPE_UNKNOWN
};
1571 procedure_kind (gfc_symbol
*sym
)
1573 if (generic_sym (sym
))
1574 return PTYPE_GENERIC
;
1576 if (specific_sym (sym
))
1577 return PTYPE_SPECIFIC
;
1579 return PTYPE_UNKNOWN
;
1582 /* Check references to assumed size arrays. The flag need_full_assumed_size
1583 is nonzero when matching actual arguments. */
1585 static int need_full_assumed_size
= 0;
1588 check_assumed_size_reference (gfc_symbol
*sym
, gfc_expr
*e
)
1590 if (need_full_assumed_size
|| !(sym
->as
&& sym
->as
->type
== AS_ASSUMED_SIZE
))
1593 /* FIXME: The comparison "e->ref->u.ar.type == AR_FULL" is wrong.
1594 What should it be? */
1595 if (e
->ref
&& (e
->ref
->u
.ar
.end
[e
->ref
->u
.ar
.as
->rank
- 1] == NULL
)
1596 && (e
->ref
->u
.ar
.as
->type
== AS_ASSUMED_SIZE
)
1597 && (e
->ref
->u
.ar
.type
== AR_FULL
))
1599 gfc_error ("The upper bound in the last dimension must "
1600 "appear in the reference to the assumed size "
1601 "array %qs at %L", sym
->name
, &e
->where
);
1608 /* Look for bad assumed size array references in argument expressions
1609 of elemental and array valued intrinsic procedures. Since this is
1610 called from procedure resolution functions, it only recurses at
1614 resolve_assumed_size_actual (gfc_expr
*e
)
1619 switch (e
->expr_type
)
1622 if (e
->symtree
&& check_assumed_size_reference (e
->symtree
->n
.sym
, e
))
1627 if (resolve_assumed_size_actual (e
->value
.op
.op1
)
1628 || resolve_assumed_size_actual (e
->value
.op
.op2
))
1639 /* Check a generic procedure, passed as an actual argument, to see if
1640 there is a matching specific name. If none, it is an error, and if
1641 more than one, the reference is ambiguous. */
1643 count_specific_procs (gfc_expr
*e
)
1650 sym
= e
->symtree
->n
.sym
;
1652 for (p
= sym
->generic
; p
; p
= p
->next
)
1653 if (strcmp (sym
->name
, p
->sym
->name
) == 0)
1655 e
->symtree
= gfc_find_symtree (p
->sym
->ns
->sym_root
,
1661 gfc_error ("%qs at %L is ambiguous", e
->symtree
->n
.sym
->name
,
1665 gfc_error ("GENERIC procedure %qs is not allowed as an actual "
1666 "argument at %L", sym
->name
, &e
->where
);
1672 /* See if a call to sym could possibly be a not allowed RECURSION because of
1673 a missing RECURSIVE declaration. This means that either sym is the current
1674 context itself, or sym is the parent of a contained procedure calling its
1675 non-RECURSIVE containing procedure.
1676 This also works if sym is an ENTRY. */
1679 is_illegal_recursion (gfc_symbol
* sym
, gfc_namespace
* context
)
1681 gfc_symbol
* proc_sym
;
1682 gfc_symbol
* context_proc
;
1683 gfc_namespace
* real_context
;
1685 if (sym
->attr
.flavor
== FL_PROGRAM
1686 || gfc_fl_struct (sym
->attr
.flavor
))
1689 gcc_assert (sym
->attr
.flavor
== FL_PROCEDURE
);
1691 /* If we've got an ENTRY, find real procedure. */
1692 if (sym
->attr
.entry
&& sym
->ns
->entries
)
1693 proc_sym
= sym
->ns
->entries
->sym
;
1697 /* If sym is RECURSIVE, all is well of course. */
1698 if (proc_sym
->attr
.recursive
|| flag_recursive
)
1701 /* Find the context procedure's "real" symbol if it has entries.
1702 We look for a procedure symbol, so recurse on the parents if we don't
1703 find one (like in case of a BLOCK construct). */
1704 for (real_context
= context
; ; real_context
= real_context
->parent
)
1706 /* We should find something, eventually! */
1707 gcc_assert (real_context
);
1709 context_proc
= (real_context
->entries
? real_context
->entries
->sym
1710 : real_context
->proc_name
);
1712 /* In some special cases, there may not be a proc_name, like for this
1714 real(bad_kind()) function foo () ...
1715 when checking the call to bad_kind ().
1716 In these cases, we simply return here and assume that the
1721 if (context_proc
->attr
.flavor
!= FL_LABEL
)
1725 /* A call from sym's body to itself is recursion, of course. */
1726 if (context_proc
== proc_sym
)
1729 /* The same is true if context is a contained procedure and sym the
1731 if (context_proc
->attr
.contained
)
1733 gfc_symbol
* parent_proc
;
1735 gcc_assert (context
->parent
);
1736 parent_proc
= (context
->parent
->entries
? context
->parent
->entries
->sym
1737 : context
->parent
->proc_name
);
1739 if (parent_proc
== proc_sym
)
1747 /* Resolve an intrinsic procedure: Set its function/subroutine attribute,
1748 its typespec and formal argument list. */
1751 gfc_resolve_intrinsic (gfc_symbol
*sym
, locus
*loc
)
1753 gfc_intrinsic_sym
* isym
= NULL
;
1759 /* Already resolved. */
1760 if (sym
->from_intmod
&& sym
->ts
.type
!= BT_UNKNOWN
)
1763 /* We already know this one is an intrinsic, so we don't call
1764 gfc_is_intrinsic for full checking but rather use gfc_find_function and
1765 gfc_find_subroutine directly to check whether it is a function or
1768 if (sym
->intmod_sym_id
&& sym
->attr
.subroutine
)
1770 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1771 isym
= gfc_intrinsic_subroutine_by_id (id
);
1773 else if (sym
->intmod_sym_id
)
1775 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1776 isym
= gfc_intrinsic_function_by_id (id
);
1778 else if (!sym
->attr
.subroutine
)
1779 isym
= gfc_find_function (sym
->name
);
1781 if (isym
&& !sym
->attr
.subroutine
)
1783 if (sym
->ts
.type
!= BT_UNKNOWN
&& warn_surprising
1784 && !sym
->attr
.implicit_type
)
1785 gfc_warning (OPT_Wsurprising
,
1786 "Type specified for intrinsic function %qs at %L is"
1787 " ignored", sym
->name
, &sym
->declared_at
);
1789 if (!sym
->attr
.function
&&
1790 !gfc_add_function(&sym
->attr
, sym
->name
, loc
))
1795 else if (isym
|| (isym
= gfc_find_subroutine (sym
->name
)))
1797 if (sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.implicit_type
)
1799 gfc_error ("Intrinsic subroutine %qs at %L shall not have a type"
1800 " specifier", sym
->name
, &sym
->declared_at
);
1804 if (!sym
->attr
.subroutine
&&
1805 !gfc_add_subroutine(&sym
->attr
, sym
->name
, loc
))
1810 gfc_error ("%qs declared INTRINSIC at %L does not exist", sym
->name
,
1815 gfc_copy_formal_args_intr (sym
, isym
, NULL
);
1817 sym
->attr
.pure
= isym
->pure
;
1818 sym
->attr
.elemental
= isym
->elemental
;
1820 /* Check it is actually available in the standard settings. */
1821 if (!gfc_check_intrinsic_standard (isym
, &symstd
, false, sym
->declared_at
))
1823 gfc_error ("The intrinsic %qs declared INTRINSIC at %L is not "
1824 "available in the current standard settings but %s. Use "
1825 "an appropriate %<-std=*%> option or enable "
1826 "%<-fall-intrinsics%> in order to use it.",
1827 sym
->name
, &sym
->declared_at
, symstd
);
1835 /* Resolve a procedure expression, like passing it to a called procedure or as
1836 RHS for a procedure pointer assignment. */
1839 resolve_procedure_expression (gfc_expr
* expr
)
1843 if (expr
->expr_type
!= EXPR_VARIABLE
)
1845 gcc_assert (expr
->symtree
);
1847 sym
= expr
->symtree
->n
.sym
;
1849 if (sym
->attr
.intrinsic
)
1850 gfc_resolve_intrinsic (sym
, &expr
->where
);
1852 if (sym
->attr
.flavor
!= FL_PROCEDURE
1853 || (sym
->attr
.function
&& sym
->result
== sym
))
1856 /* A non-RECURSIVE procedure that is used as procedure expression within its
1857 own body is in danger of being called recursively. */
1858 if (is_illegal_recursion (sym
, gfc_current_ns
))
1859 gfc_warning (0, "Non-RECURSIVE procedure %qs at %L is possibly calling"
1860 " itself recursively. Declare it RECURSIVE or use"
1861 " %<-frecursive%>", sym
->name
, &expr
->where
);
1867 /* Resolve an actual argument list. Most of the time, this is just
1868 resolving the expressions in the list.
1869 The exception is that we sometimes have to decide whether arguments
1870 that look like procedure arguments are really simple variable
1874 resolve_actual_arglist (gfc_actual_arglist
*arg
, procedure_type ptype
,
1875 bool no_formal_args
)
1878 gfc_symtree
*parent_st
;
1880 gfc_component
*comp
;
1881 int save_need_full_assumed_size
;
1882 bool return_value
= false;
1883 bool actual_arg_sav
= actual_arg
, first_actual_arg_sav
= first_actual_arg
;
1886 first_actual_arg
= true;
1888 for (; arg
; arg
= arg
->next
)
1893 /* Check the label is a valid branching target. */
1896 if (arg
->label
->defined
== ST_LABEL_UNKNOWN
)
1898 gfc_error ("Label %d referenced at %L is never defined",
1899 arg
->label
->value
, &arg
->label
->where
);
1903 first_actual_arg
= false;
1907 if (e
->expr_type
== EXPR_VARIABLE
1908 && e
->symtree
->n
.sym
->attr
.generic
1910 && count_specific_procs (e
) != 1)
1913 if (e
->ts
.type
!= BT_PROCEDURE
)
1915 save_need_full_assumed_size
= need_full_assumed_size
;
1916 if (e
->expr_type
!= EXPR_VARIABLE
)
1917 need_full_assumed_size
= 0;
1918 if (!gfc_resolve_expr (e
))
1920 need_full_assumed_size
= save_need_full_assumed_size
;
1924 /* See if the expression node should really be a variable reference. */
1926 sym
= e
->symtree
->n
.sym
;
1928 if (sym
->attr
.flavor
== FL_PROCEDURE
1929 || sym
->attr
.intrinsic
1930 || sym
->attr
.external
)
1934 /* If a procedure is not already determined to be something else
1935 check if it is intrinsic. */
1936 if (gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, e
->where
))
1937 sym
->attr
.intrinsic
= 1;
1939 if (sym
->attr
.proc
== PROC_ST_FUNCTION
)
1941 gfc_error ("Statement function %qs at %L is not allowed as an "
1942 "actual argument", sym
->name
, &e
->where
);
1945 actual_ok
= gfc_intrinsic_actual_ok (sym
->name
,
1946 sym
->attr
.subroutine
);
1947 if (sym
->attr
.intrinsic
&& actual_ok
== 0)
1949 gfc_error ("Intrinsic %qs at %L is not allowed as an "
1950 "actual argument", sym
->name
, &e
->where
);
1953 if (sym
->attr
.contained
&& !sym
->attr
.use_assoc
1954 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
1956 if (!gfc_notify_std (GFC_STD_F2008
, "Internal procedure %qs is"
1957 " used as actual argument at %L",
1958 sym
->name
, &e
->where
))
1962 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
)
1964 gfc_error ("ELEMENTAL non-INTRINSIC procedure %qs is not "
1965 "allowed as an actual argument at %L", sym
->name
,
1969 /* Check if a generic interface has a specific procedure
1970 with the same name before emitting an error. */
1971 if (sym
->attr
.generic
&& count_specific_procs (e
) != 1)
1974 /* Just in case a specific was found for the expression. */
1975 sym
= e
->symtree
->n
.sym
;
1977 /* If the symbol is the function that names the current (or
1978 parent) scope, then we really have a variable reference. */
1980 if (gfc_is_function_return_value (sym
, sym
->ns
))
1983 /* If all else fails, see if we have a specific intrinsic. */
1984 if (sym
->ts
.type
== BT_UNKNOWN
&& sym
->attr
.intrinsic
)
1986 gfc_intrinsic_sym
*isym
;
1988 isym
= gfc_find_function (sym
->name
);
1989 if (isym
== NULL
|| !isym
->specific
)
1991 gfc_error ("Unable to find a specific INTRINSIC procedure "
1992 "for the reference %qs at %L", sym
->name
,
1997 sym
->attr
.intrinsic
= 1;
1998 sym
->attr
.function
= 1;
2001 if (!gfc_resolve_expr (e
))
2006 /* See if the name is a module procedure in a parent unit. */
2008 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
2011 if (gfc_find_sym_tree (sym
->name
, sym
->ns
->parent
, 1, &parent_st
))
2013 gfc_error ("Symbol %qs at %L is ambiguous", sym
->name
, &e
->where
);
2017 if (parent_st
== NULL
)
2020 sym
= parent_st
->n
.sym
;
2021 e
->symtree
= parent_st
; /* Point to the right thing. */
2023 if (sym
->attr
.flavor
== FL_PROCEDURE
2024 || sym
->attr
.intrinsic
2025 || sym
->attr
.external
)
2027 if (!gfc_resolve_expr (e
))
2033 e
->expr_type
= EXPR_VARIABLE
;
2035 if ((sym
->as
!= NULL
&& sym
->ts
.type
!= BT_CLASS
)
2036 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
2037 && CLASS_DATA (sym
)->as
))
2039 e
->rank
= sym
->ts
.type
== BT_CLASS
2040 ? CLASS_DATA (sym
)->as
->rank
: sym
->as
->rank
;
2041 e
->ref
= gfc_get_ref ();
2042 e
->ref
->type
= REF_ARRAY
;
2043 e
->ref
->u
.ar
.type
= AR_FULL
;
2044 e
->ref
->u
.ar
.as
= sym
->ts
.type
== BT_CLASS
2045 ? CLASS_DATA (sym
)->as
: sym
->as
;
2048 /* Expressions are assigned a default ts.type of BT_PROCEDURE in
2049 primary.c (match_actual_arg). If above code determines that it
2050 is a variable instead, it needs to be resolved as it was not
2051 done at the beginning of this function. */
2052 save_need_full_assumed_size
= need_full_assumed_size
;
2053 if (e
->expr_type
!= EXPR_VARIABLE
)
2054 need_full_assumed_size
= 0;
2055 if (!gfc_resolve_expr (e
))
2057 need_full_assumed_size
= save_need_full_assumed_size
;
2060 /* Check argument list functions %VAL, %LOC and %REF. There is
2061 nothing to do for %REF. */
2062 if (arg
->name
&& arg
->name
[0] == '%')
2064 if (strncmp ("%VAL", arg
->name
, 4) == 0)
2066 if (e
->ts
.type
== BT_CHARACTER
|| e
->ts
.type
== BT_DERIVED
)
2068 gfc_error ("By-value argument at %L is not of numeric "
2075 gfc_error ("By-value argument at %L cannot be an array or "
2076 "an array section", &e
->where
);
2080 /* Intrinsics are still PROC_UNKNOWN here. However,
2081 since same file external procedures are not resolvable
2082 in gfortran, it is a good deal easier to leave them to
2084 if (ptype
!= PROC_UNKNOWN
2085 && ptype
!= PROC_DUMMY
2086 && ptype
!= PROC_EXTERNAL
2087 && ptype
!= PROC_MODULE
)
2089 gfc_error ("By-value argument at %L is not allowed "
2090 "in this context", &e
->where
);
2095 /* Statement functions have already been excluded above. */
2096 else if (strncmp ("%LOC", arg
->name
, 4) == 0
2097 && e
->ts
.type
== BT_PROCEDURE
)
2099 if (e
->symtree
->n
.sym
->attr
.proc
== PROC_INTERNAL
)
2101 gfc_error ("Passing internal procedure at %L by location "
2102 "not allowed", &e
->where
);
2108 comp
= gfc_get_proc_ptr_comp(e
);
2109 if (e
->expr_type
== EXPR_VARIABLE
2110 && comp
&& comp
->attr
.elemental
)
2112 gfc_error ("ELEMENTAL procedure pointer component %qs is not "
2113 "allowed as an actual argument at %L", comp
->name
,
2117 /* Fortran 2008, C1237. */
2118 if (e
->expr_type
== EXPR_VARIABLE
&& gfc_is_coindexed (e
)
2119 && gfc_has_ultimate_pointer (e
))
2121 gfc_error ("Coindexed actual argument at %L with ultimate pointer "
2122 "component", &e
->where
);
2126 first_actual_arg
= false;
2129 return_value
= true;
2132 actual_arg
= actual_arg_sav
;
2133 first_actual_arg
= first_actual_arg_sav
;
2135 return return_value
;
2139 /* Do the checks of the actual argument list that are specific to elemental
2140 procedures. If called with c == NULL, we have a function, otherwise if
2141 expr == NULL, we have a subroutine. */
2144 resolve_elemental_actual (gfc_expr
*expr
, gfc_code
*c
)
2146 gfc_actual_arglist
*arg0
;
2147 gfc_actual_arglist
*arg
;
2148 gfc_symbol
*esym
= NULL
;
2149 gfc_intrinsic_sym
*isym
= NULL
;
2151 gfc_intrinsic_arg
*iformal
= NULL
;
2152 gfc_formal_arglist
*eformal
= NULL
;
2153 bool formal_optional
= false;
2154 bool set_by_optional
= false;
2158 /* Is this an elemental procedure? */
2159 if (expr
&& expr
->value
.function
.actual
!= NULL
)
2161 if (expr
->value
.function
.esym
!= NULL
2162 && expr
->value
.function
.esym
->attr
.elemental
)
2164 arg0
= expr
->value
.function
.actual
;
2165 esym
= expr
->value
.function
.esym
;
2167 else if (expr
->value
.function
.isym
!= NULL
2168 && expr
->value
.function
.isym
->elemental
)
2170 arg0
= expr
->value
.function
.actual
;
2171 isym
= expr
->value
.function
.isym
;
2176 else if (c
&& c
->ext
.actual
!= NULL
)
2178 arg0
= c
->ext
.actual
;
2180 if (c
->resolved_sym
)
2181 esym
= c
->resolved_sym
;
2183 esym
= c
->symtree
->n
.sym
;
2186 if (!esym
->attr
.elemental
)
2192 /* The rank of an elemental is the rank of its array argument(s). */
2193 for (arg
= arg0
; arg
; arg
= arg
->next
)
2195 if (arg
->expr
!= NULL
&& arg
->expr
->rank
!= 0)
2197 rank
= arg
->expr
->rank
;
2198 if (arg
->expr
->expr_type
== EXPR_VARIABLE
2199 && arg
->expr
->symtree
->n
.sym
->attr
.optional
)
2200 set_by_optional
= true;
2202 /* Function specific; set the result rank and shape. */
2206 if (!expr
->shape
&& arg
->expr
->shape
)
2208 expr
->shape
= gfc_get_shape (rank
);
2209 for (i
= 0; i
< rank
; i
++)
2210 mpz_init_set (expr
->shape
[i
], arg
->expr
->shape
[i
]);
2217 /* If it is an array, it shall not be supplied as an actual argument
2218 to an elemental procedure unless an array of the same rank is supplied
2219 as an actual argument corresponding to a nonoptional dummy argument of
2220 that elemental procedure(12.4.1.5). */
2221 formal_optional
= false;
2223 iformal
= isym
->formal
;
2225 eformal
= esym
->formal
;
2227 for (arg
= arg0
; arg
; arg
= arg
->next
)
2231 if (eformal
->sym
&& eformal
->sym
->attr
.optional
)
2232 formal_optional
= true;
2233 eformal
= eformal
->next
;
2235 else if (isym
&& iformal
)
2237 if (iformal
->optional
)
2238 formal_optional
= true;
2239 iformal
= iformal
->next
;
2242 formal_optional
= true;
2244 if (pedantic
&& arg
->expr
!= NULL
2245 && arg
->expr
->expr_type
== EXPR_VARIABLE
2246 && arg
->expr
->symtree
->n
.sym
->attr
.optional
2249 && (set_by_optional
|| arg
->expr
->rank
!= rank
)
2250 && !(isym
&& isym
->id
== GFC_ISYM_CONVERSION
))
2252 gfc_warning (OPT_Wpedantic
,
2253 "%qs at %L is an array and OPTIONAL; IF IT IS "
2254 "MISSING, it cannot be the actual argument of an "
2255 "ELEMENTAL procedure unless there is a non-optional "
2256 "argument with the same rank (12.4.1.5)",
2257 arg
->expr
->symtree
->n
.sym
->name
, &arg
->expr
->where
);
2261 for (arg
= arg0
; arg
; arg
= arg
->next
)
2263 if (arg
->expr
== NULL
|| arg
->expr
->rank
== 0)
2266 /* Being elemental, the last upper bound of an assumed size array
2267 argument must be present. */
2268 if (resolve_assumed_size_actual (arg
->expr
))
2271 /* Elemental procedure's array actual arguments must conform. */
2274 if (!gfc_check_conformance (arg
->expr
, e
, "elemental procedure"))
2281 /* INTENT(OUT) is only allowed for subroutines; if any actual argument
2282 is an array, the intent inout/out variable needs to be also an array. */
2283 if (rank
> 0 && esym
&& expr
== NULL
)
2284 for (eformal
= esym
->formal
, arg
= arg0
; arg
&& eformal
;
2285 arg
= arg
->next
, eformal
= eformal
->next
)
2286 if ((eformal
->sym
->attr
.intent
== INTENT_OUT
2287 || eformal
->sym
->attr
.intent
== INTENT_INOUT
)
2288 && arg
->expr
&& arg
->expr
->rank
== 0)
2290 gfc_error ("Actual argument at %L for INTENT(%s) dummy %qs of "
2291 "ELEMENTAL subroutine %qs is a scalar, but another "
2292 "actual argument is an array", &arg
->expr
->where
,
2293 (eformal
->sym
->attr
.intent
== INTENT_OUT
) ? "OUT"
2294 : "INOUT", eformal
->sym
->name
, esym
->name
);
2301 /* This function does the checking of references to global procedures
2302 as defined in sections 18.1 and 14.1, respectively, of the Fortran
2303 77 and 95 standards. It checks for a gsymbol for the name, making
2304 one if it does not already exist. If it already exists, then the
2305 reference being resolved must correspond to the type of gsymbol.
2306 Otherwise, the new symbol is equipped with the attributes of the
2307 reference. The corresponding code that is called in creating
2308 global entities is parse.c.
2310 In addition, for all but -std=legacy, the gsymbols are used to
2311 check the interfaces of external procedures from the same file.
2312 The namespace of the gsymbol is resolved and then, once this is
2313 done the interface is checked. */
2317 not_in_recursive (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2319 if (!gsym_ns
->proc_name
->attr
.recursive
)
2322 if (sym
->ns
== gsym_ns
)
2325 if (sym
->ns
->parent
&& sym
->ns
->parent
== gsym_ns
)
2332 not_entry_self_reference (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2334 if (gsym_ns
->entries
)
2336 gfc_entry_list
*entry
= gsym_ns
->entries
;
2338 for (; entry
; entry
= entry
->next
)
2340 if (strcmp (sym
->name
, entry
->sym
->name
) == 0)
2342 if (strcmp (gsym_ns
->proc_name
->name
,
2343 sym
->ns
->proc_name
->name
) == 0)
2347 && strcmp (gsym_ns
->proc_name
->name
,
2348 sym
->ns
->parent
->proc_name
->name
) == 0)
2357 /* Check for the requirement of an explicit interface. F08:12.4.2.2. */
2360 gfc_explicit_interface_required (gfc_symbol
*sym
, char *errmsg
, int err_len
)
2362 gfc_formal_arglist
*arg
= gfc_sym_get_dummy_args (sym
);
2364 for ( ; arg
; arg
= arg
->next
)
2369 if (arg
->sym
->attr
.allocatable
) /* (2a) */
2371 strncpy (errmsg
, _("allocatable argument"), err_len
);
2374 else if (arg
->sym
->attr
.asynchronous
)
2376 strncpy (errmsg
, _("asynchronous argument"), err_len
);
2379 else if (arg
->sym
->attr
.optional
)
2381 strncpy (errmsg
, _("optional argument"), err_len
);
2384 else if (arg
->sym
->attr
.pointer
)
2386 strncpy (errmsg
, _("pointer argument"), err_len
);
2389 else if (arg
->sym
->attr
.target
)
2391 strncpy (errmsg
, _("target argument"), err_len
);
2394 else if (arg
->sym
->attr
.value
)
2396 strncpy (errmsg
, _("value argument"), err_len
);
2399 else if (arg
->sym
->attr
.volatile_
)
2401 strncpy (errmsg
, _("volatile argument"), err_len
);
2404 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_SHAPE
) /* (2b) */
2406 strncpy (errmsg
, _("assumed-shape argument"), err_len
);
2409 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_RANK
) /* TS 29113, 6.2. */
2411 strncpy (errmsg
, _("assumed-rank argument"), err_len
);
2414 else if (arg
->sym
->attr
.codimension
) /* (2c) */
2416 strncpy (errmsg
, _("coarray argument"), err_len
);
2419 else if (false) /* (2d) TODO: parametrized derived type */
2421 strncpy (errmsg
, _("parametrized derived type argument"), err_len
);
2424 else if (arg
->sym
->ts
.type
== BT_CLASS
) /* (2e) */
2426 strncpy (errmsg
, _("polymorphic argument"), err_len
);
2429 else if (arg
->sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
2431 strncpy (errmsg
, _("NO_ARG_CHECK attribute"), err_len
);
2434 else if (arg
->sym
->ts
.type
== BT_ASSUMED
)
2436 /* As assumed-type is unlimited polymorphic (cf. above).
2437 See also TS 29113, Note 6.1. */
2438 strncpy (errmsg
, _("assumed-type argument"), err_len
);
2443 if (sym
->attr
.function
)
2445 gfc_symbol
*res
= sym
->result
? sym
->result
: sym
;
2447 if (res
->attr
.dimension
) /* (3a) */
2449 strncpy (errmsg
, _("array result"), err_len
);
2452 else if (res
->attr
.pointer
|| res
->attr
.allocatable
) /* (3b) */
2454 strncpy (errmsg
, _("pointer or allocatable result"), err_len
);
2457 else if (res
->ts
.type
== BT_CHARACTER
&& res
->ts
.u
.cl
2458 && res
->ts
.u
.cl
->length
2459 && res
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
) /* (3c) */
2461 strncpy (errmsg
, _("result with non-constant character length"), err_len
);
2466 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
) /* (4) */
2468 strncpy (errmsg
, _("elemental procedure"), err_len
);
2471 else if (sym
->attr
.is_bind_c
) /* (5) */
2473 strncpy (errmsg
, _("bind(c) procedure"), err_len
);
2482 resolve_global_procedure (gfc_symbol
*sym
, locus
*where
,
2483 gfc_actual_arglist
**actual
, int sub
)
2487 enum gfc_symbol_type type
;
2490 type
= sub
? GSYM_SUBROUTINE
: GSYM_FUNCTION
;
2492 gsym
= gfc_get_gsymbol (sym
->binding_label
? sym
->binding_label
: sym
->name
);
2494 if ((gsym
->type
!= GSYM_UNKNOWN
&& gsym
->type
!= type
))
2495 gfc_global_used (gsym
, where
);
2497 if ((sym
->attr
.if_source
== IFSRC_UNKNOWN
2498 || sym
->attr
.if_source
== IFSRC_IFBODY
)
2499 && gsym
->type
!= GSYM_UNKNOWN
2500 && !gsym
->binding_label
2502 && gsym
->ns
->resolved
!= -1
2503 && gsym
->ns
->proc_name
2504 && not_in_recursive (sym
, gsym
->ns
)
2505 && not_entry_self_reference (sym
, gsym
->ns
))
2507 gfc_symbol
*def_sym
;
2509 /* Resolve the gsymbol namespace if needed. */
2510 if (!gsym
->ns
->resolved
)
2512 gfc_symbol
*old_dt_list
;
2514 /* Stash away derived types so that the backend_decls do not
2516 old_dt_list
= gfc_derived_types
;
2517 gfc_derived_types
= NULL
;
2519 gfc_resolve (gsym
->ns
);
2521 /* Store the new derived types with the global namespace. */
2522 if (gfc_derived_types
)
2523 gsym
->ns
->derived_types
= gfc_derived_types
;
2525 /* Restore the derived types of this namespace. */
2526 gfc_derived_types
= old_dt_list
;
2529 /* Make sure that translation for the gsymbol occurs before
2530 the procedure currently being resolved. */
2531 ns
= gfc_global_ns_list
;
2532 for (; ns
&& ns
!= gsym
->ns
; ns
= ns
->sibling
)
2534 if (ns
->sibling
== gsym
->ns
)
2536 ns
->sibling
= gsym
->ns
->sibling
;
2537 gsym
->ns
->sibling
= gfc_global_ns_list
;
2538 gfc_global_ns_list
= gsym
->ns
;
2543 def_sym
= gsym
->ns
->proc_name
;
2545 /* This can happen if a binding name has been specified. */
2546 if (gsym
->binding_label
&& gsym
->sym_name
!= def_sym
->name
)
2547 gfc_find_symbol (gsym
->sym_name
, gsym
->ns
, 0, &def_sym
);
2549 if (def_sym
->attr
.entry_master
)
2551 gfc_entry_list
*entry
;
2552 for (entry
= gsym
->ns
->entries
; entry
; entry
= entry
->next
)
2553 if (strcmp (entry
->sym
->name
, sym
->name
) == 0)
2555 def_sym
= entry
->sym
;
2560 if (sym
->attr
.function
&& !gfc_compare_types (&sym
->ts
, &def_sym
->ts
))
2562 gfc_error ("Return type mismatch of function %qs at %L (%s/%s)",
2563 sym
->name
, &sym
->declared_at
, gfc_typename (&sym
->ts
),
2564 gfc_typename (&def_sym
->ts
));
2568 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
2569 && gfc_explicit_interface_required (def_sym
, reason
, sizeof(reason
)))
2571 gfc_error ("Explicit interface required for %qs at %L: %s",
2572 sym
->name
, &sym
->declared_at
, reason
);
2576 if (!pedantic
&& (gfc_option
.allow_std
& GFC_STD_GNU
))
2577 /* Turn erros into warnings with -std=gnu and -std=legacy. */
2578 gfc_errors_to_warnings (true);
2580 if (!gfc_compare_interfaces (sym
, def_sym
, sym
->name
, 0, 1,
2581 reason
, sizeof(reason
), NULL
, NULL
))
2583 gfc_error_opt (OPT_Wargument_mismatch
,
2584 "Interface mismatch in global procedure %qs at %L:"
2585 " %s", sym
->name
, &sym
->declared_at
, reason
);
2590 || ((gfc_option
.warn_std
& GFC_STD_LEGACY
)
2591 && !(gfc_option
.warn_std
& GFC_STD_GNU
)))
2592 gfc_errors_to_warnings (true);
2594 if (sym
->attr
.if_source
!= IFSRC_IFBODY
)
2595 gfc_procedure_use (def_sym
, actual
, where
);
2599 gfc_errors_to_warnings (false);
2601 if (gsym
->type
== GSYM_UNKNOWN
)
2604 gsym
->where
= *where
;
2611 /************* Function resolution *************/
2613 /* Resolve a function call known to be generic.
2614 Section 14.1.2.4.1. */
2617 resolve_generic_f0 (gfc_expr
*expr
, gfc_symbol
*sym
)
2621 if (sym
->attr
.generic
)
2623 s
= gfc_search_interface (sym
->generic
, 0, &expr
->value
.function
.actual
);
2626 expr
->value
.function
.name
= s
->name
;
2627 expr
->value
.function
.esym
= s
;
2629 if (s
->ts
.type
!= BT_UNKNOWN
)
2631 else if (s
->result
!= NULL
&& s
->result
->ts
.type
!= BT_UNKNOWN
)
2632 expr
->ts
= s
->result
->ts
;
2635 expr
->rank
= s
->as
->rank
;
2636 else if (s
->result
!= NULL
&& s
->result
->as
!= NULL
)
2637 expr
->rank
= s
->result
->as
->rank
;
2639 gfc_set_sym_referenced (expr
->value
.function
.esym
);
2644 /* TODO: Need to search for elemental references in generic
2648 if (sym
->attr
.intrinsic
)
2649 return gfc_intrinsic_func_interface (expr
, 0);
2656 resolve_generic_f (gfc_expr
*expr
)
2660 gfc_interface
*intr
= NULL
;
2662 sym
= expr
->symtree
->n
.sym
;
2666 m
= resolve_generic_f0 (expr
, sym
);
2669 else if (m
== MATCH_ERROR
)
2674 for (intr
= sym
->generic
; intr
; intr
= intr
->next
)
2675 if (gfc_fl_struct (intr
->sym
->attr
.flavor
))
2678 if (sym
->ns
->parent
== NULL
)
2680 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2684 if (!generic_sym (sym
))
2688 /* Last ditch attempt. See if the reference is to an intrinsic
2689 that possesses a matching interface. 14.1.2.4 */
2690 if (sym
&& !intr
&& !gfc_is_intrinsic (sym
, 0, expr
->where
))
2692 if (gfc_init_expr_flag
)
2693 gfc_error ("Function %qs in initialization expression at %L "
2694 "must be an intrinsic function",
2695 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2697 gfc_error ("There is no specific function for the generic %qs "
2698 "at %L", expr
->symtree
->n
.sym
->name
, &expr
->where
);
2704 if (!gfc_convert_to_structure_constructor (expr
, intr
->sym
, NULL
,
2707 if (!gfc_use_derived (expr
->ts
.u
.derived
))
2709 return resolve_structure_cons (expr
, 0);
2712 m
= gfc_intrinsic_func_interface (expr
, 0);
2717 gfc_error ("Generic function %qs at %L is not consistent with a "
2718 "specific intrinsic interface", expr
->symtree
->n
.sym
->name
,
2725 /* Resolve a function call known to be specific. */
2728 resolve_specific_f0 (gfc_symbol
*sym
, gfc_expr
*expr
)
2732 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
2734 if (sym
->attr
.dummy
)
2736 sym
->attr
.proc
= PROC_DUMMY
;
2740 sym
->attr
.proc
= PROC_EXTERNAL
;
2744 if (sym
->attr
.proc
== PROC_MODULE
2745 || sym
->attr
.proc
== PROC_ST_FUNCTION
2746 || sym
->attr
.proc
== PROC_INTERNAL
)
2749 if (sym
->attr
.intrinsic
)
2751 m
= gfc_intrinsic_func_interface (expr
, 1);
2755 gfc_error ("Function %qs at %L is INTRINSIC but is not compatible "
2756 "with an intrinsic", sym
->name
, &expr
->where
);
2764 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2767 expr
->ts
= sym
->result
->ts
;
2770 expr
->value
.function
.name
= sym
->name
;
2771 expr
->value
.function
.esym
= sym
;
2772 /* Prevent crash when sym->ts.u.derived->components is not set due to previous
2774 if (sym
->ts
.type
== BT_CLASS
&& !CLASS_DATA (sym
))
2776 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)
2777 expr
->rank
= CLASS_DATA (sym
)->as
->rank
;
2778 else if (sym
->as
!= NULL
)
2779 expr
->rank
= sym
->as
->rank
;
2786 resolve_specific_f (gfc_expr
*expr
)
2791 sym
= expr
->symtree
->n
.sym
;
2795 m
= resolve_specific_f0 (sym
, expr
);
2798 if (m
== MATCH_ERROR
)
2801 if (sym
->ns
->parent
== NULL
)
2804 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2810 gfc_error ("Unable to resolve the specific function %qs at %L",
2811 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2816 /* Recursively append candidate SYM to CANDIDATES. Store the number of
2817 candidates in CANDIDATES_LEN. */
2820 lookup_function_fuzzy_find_candidates (gfc_symtree
*sym
,
2822 size_t &candidates_len
)
2828 if ((sym
->n
.sym
->ts
.type
!= BT_UNKNOWN
|| sym
->n
.sym
->attr
.external
)
2829 && sym
->n
.sym
->attr
.flavor
== FL_PROCEDURE
)
2830 vec_push (candidates
, candidates_len
, sym
->name
);
2834 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2838 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2842 /* Lookup function FN fuzzily, taking names in SYMROOT into account. */
2845 gfc_lookup_function_fuzzy (const char *fn
, gfc_symtree
*symroot
)
2847 char **candidates
= NULL
;
2848 size_t candidates_len
= 0;
2849 lookup_function_fuzzy_find_candidates (symroot
, candidates
, candidates_len
);
2850 return gfc_closest_fuzzy_match (fn
, candidates
);
2854 /* Resolve a procedure call not known to be generic nor specific. */
2857 resolve_unknown_f (gfc_expr
*expr
)
2862 sym
= expr
->symtree
->n
.sym
;
2864 if (sym
->attr
.dummy
)
2866 sym
->attr
.proc
= PROC_DUMMY
;
2867 expr
->value
.function
.name
= sym
->name
;
2871 /* See if we have an intrinsic function reference. */
2873 if (gfc_is_intrinsic (sym
, 0, expr
->where
))
2875 if (gfc_intrinsic_func_interface (expr
, 1) == MATCH_YES
)
2880 /* The reference is to an external name. */
2882 sym
->attr
.proc
= PROC_EXTERNAL
;
2883 expr
->value
.function
.name
= sym
->name
;
2884 expr
->value
.function
.esym
= expr
->symtree
->n
.sym
;
2886 if (sym
->as
!= NULL
)
2887 expr
->rank
= sym
->as
->rank
;
2889 /* Type of the expression is either the type of the symbol or the
2890 default type of the symbol. */
2893 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2895 if (sym
->ts
.type
!= BT_UNKNOWN
)
2899 ts
= gfc_get_default_type (sym
->name
, sym
->ns
);
2901 if (ts
->type
== BT_UNKNOWN
)
2904 = gfc_lookup_function_fuzzy (sym
->name
, sym
->ns
->sym_root
);
2906 gfc_error ("Function %qs at %L has no IMPLICIT type"
2907 "; did you mean %qs?",
2908 sym
->name
, &expr
->where
, guessed
);
2910 gfc_error ("Function %qs at %L has no IMPLICIT type",
2911 sym
->name
, &expr
->where
);
2922 /* Return true, if the symbol is an external procedure. */
2924 is_external_proc (gfc_symbol
*sym
)
2926 if (!sym
->attr
.dummy
&& !sym
->attr
.contained
2927 && !gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, sym
->declared_at
)
2928 && sym
->attr
.proc
!= PROC_ST_FUNCTION
2929 && !sym
->attr
.proc_pointer
2930 && !sym
->attr
.use_assoc
2938 /* Figure out if a function reference is pure or not. Also set the name
2939 of the function for a potential error message. Return nonzero if the
2940 function is PURE, zero if not. */
2942 pure_stmt_function (gfc_expr
*, gfc_symbol
*);
2945 gfc_pure_function (gfc_expr
*e
, const char **name
)
2948 gfc_component
*comp
;
2952 if (e
->symtree
!= NULL
2953 && e
->symtree
->n
.sym
!= NULL
2954 && e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
2955 return pure_stmt_function (e
, e
->symtree
->n
.sym
);
2957 comp
= gfc_get_proc_ptr_comp (e
);
2960 pure
= gfc_pure (comp
->ts
.interface
);
2963 else if (e
->value
.function
.esym
)
2965 pure
= gfc_pure (e
->value
.function
.esym
);
2966 *name
= e
->value
.function
.esym
->name
;
2968 else if (e
->value
.function
.isym
)
2970 pure
= e
->value
.function
.isym
->pure
2971 || e
->value
.function
.isym
->elemental
;
2972 *name
= e
->value
.function
.isym
->name
;
2976 /* Implicit functions are not pure. */
2978 *name
= e
->value
.function
.name
;
2985 /* Check if the expression is a reference to an implicitly pure function. */
2988 gfc_implicit_pure_function (gfc_expr
*e
)
2990 gfc_component
*comp
= gfc_get_proc_ptr_comp (e
);
2992 return gfc_implicit_pure (comp
->ts
.interface
);
2993 else if (e
->value
.function
.esym
)
2994 return gfc_implicit_pure (e
->value
.function
.esym
);
3001 impure_stmt_fcn (gfc_expr
*e
, gfc_symbol
*sym
,
3002 int *f ATTRIBUTE_UNUSED
)
3006 /* Don't bother recursing into other statement functions
3007 since they will be checked individually for purity. */
3008 if (e
->expr_type
!= EXPR_FUNCTION
3010 || e
->symtree
->n
.sym
== sym
3011 || e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
3014 return gfc_pure_function (e
, &name
) ? false : true;
3019 pure_stmt_function (gfc_expr
*e
, gfc_symbol
*sym
)
3021 return gfc_traverse_expr (e
, sym
, impure_stmt_fcn
, 0) ? 0 : 1;
3025 /* Check if an impure function is allowed in the current context. */
3027 static bool check_pure_function (gfc_expr
*e
)
3029 const char *name
= NULL
;
3030 if (!gfc_pure_function (e
, &name
) && name
)
3034 gfc_error ("Reference to impure function %qs at %L inside a "
3035 "FORALL %s", name
, &e
->where
,
3036 forall_flag
== 2 ? "mask" : "block");
3039 else if (gfc_do_concurrent_flag
)
3041 gfc_error ("Reference to impure function %qs at %L inside a "
3042 "DO CONCURRENT %s", name
, &e
->where
,
3043 gfc_do_concurrent_flag
== 2 ? "mask" : "block");
3046 else if (gfc_pure (NULL
))
3048 gfc_error ("Reference to impure function %qs at %L "
3049 "within a PURE procedure", name
, &e
->where
);
3052 if (!gfc_implicit_pure_function (e
))
3053 gfc_unset_implicit_pure (NULL
);
3059 /* Update current procedure's array_outer_dependency flag, considering
3060 a call to procedure SYM. */
3063 update_current_proc_array_outer_dependency (gfc_symbol
*sym
)
3065 /* Check to see if this is a sibling function that has not yet
3067 gfc_namespace
*sibling
= gfc_current_ns
->sibling
;
3068 for (; sibling
; sibling
= sibling
->sibling
)
3070 if (sibling
->proc_name
== sym
)
3072 gfc_resolve (sibling
);
3077 /* If SYM has references to outer arrays, so has the procedure calling
3078 SYM. If SYM is a procedure pointer, we can assume the worst. */
3079 if ((sym
->attr
.array_outer_dependency
|| sym
->attr
.proc_pointer
)
3080 && gfc_current_ns
->proc_name
)
3081 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3085 /* Resolve a function call, which means resolving the arguments, then figuring
3086 out which entity the name refers to. */
3089 resolve_function (gfc_expr
*expr
)
3091 gfc_actual_arglist
*arg
;
3095 procedure_type p
= PROC_INTRINSIC
;
3096 bool no_formal_args
;
3100 sym
= expr
->symtree
->n
.sym
;
3102 /* If this is a procedure pointer component, it has already been resolved. */
3103 if (gfc_is_proc_ptr_comp (expr
))
3106 /* Avoid re-resolving the arguments of caf_get, which can lead to inserting
3108 if (sym
&& sym
->attr
.intrinsic
3109 && (sym
->intmod_sym_id
== GFC_ISYM_CAF_GET
3110 || sym
->intmod_sym_id
== GFC_ISYM_CAF_SEND
))
3113 if (sym
&& sym
->attr
.intrinsic
3114 && !gfc_resolve_intrinsic (sym
, &expr
->where
))
3117 if (sym
&& (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.subroutine
))
3119 gfc_error ("%qs at %L is not a function", sym
->name
, &expr
->where
);
3123 /* If this is a deferred TBP with an abstract interface (which may
3124 of course be referenced), expr->value.function.esym will be set. */
3125 if (sym
&& sym
->attr
.abstract
&& !expr
->value
.function
.esym
)
3127 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3128 sym
->name
, &expr
->where
);
3132 /* If this is a deferred TBP with an abstract interface, its result
3133 cannot be an assumed length character (F2003: C418). */
3134 if (sym
&& sym
->attr
.abstract
&& sym
->attr
.function
3135 && sym
->result
->ts
.u
.cl
3136 && sym
->result
->ts
.u
.cl
->length
== NULL
3137 && !sym
->result
->ts
.deferred
)
3139 gfc_error ("ABSTRACT INTERFACE %qs at %L must not have an assumed "
3140 "character length result (F2008: C418)", sym
->name
,
3145 /* Switch off assumed size checking and do this again for certain kinds
3146 of procedure, once the procedure itself is resolved. */
3147 need_full_assumed_size
++;
3149 if (expr
->symtree
&& expr
->symtree
->n
.sym
)
3150 p
= expr
->symtree
->n
.sym
->attr
.proc
;
3152 if (expr
->value
.function
.isym
&& expr
->value
.function
.isym
->inquiry
)
3153 inquiry_argument
= true;
3154 no_formal_args
= sym
&& is_external_proc (sym
)
3155 && gfc_sym_get_dummy_args (sym
) == NULL
;
3157 if (!resolve_actual_arglist (expr
->value
.function
.actual
,
3160 inquiry_argument
= false;
3164 inquiry_argument
= false;
3166 /* Resume assumed_size checking. */
3167 need_full_assumed_size
--;
3169 /* If the procedure is external, check for usage. */
3170 if (sym
&& is_external_proc (sym
))
3171 resolve_global_procedure (sym
, &expr
->where
,
3172 &expr
->value
.function
.actual
, 0);
3174 if (sym
&& sym
->ts
.type
== BT_CHARACTER
3176 && sym
->ts
.u
.cl
->length
== NULL
3178 && !sym
->ts
.deferred
3179 && expr
->value
.function
.esym
== NULL
3180 && !sym
->attr
.contained
)
3182 /* Internal procedures are taken care of in resolve_contained_fntype. */
3183 gfc_error ("Function %qs is declared CHARACTER(*) and cannot "
3184 "be used at %L since it is not a dummy argument",
3185 sym
->name
, &expr
->where
);
3189 /* See if function is already resolved. */
3191 if (expr
->value
.function
.name
!= NULL
3192 || expr
->value
.function
.isym
!= NULL
)
3194 if (expr
->ts
.type
== BT_UNKNOWN
)
3200 /* Apply the rules of section 14.1.2. */
3202 switch (procedure_kind (sym
))
3205 t
= resolve_generic_f (expr
);
3208 case PTYPE_SPECIFIC
:
3209 t
= resolve_specific_f (expr
);
3213 t
= resolve_unknown_f (expr
);
3217 gfc_internal_error ("resolve_function(): bad function type");
3221 /* If the expression is still a function (it might have simplified),
3222 then we check to see if we are calling an elemental function. */
3224 if (expr
->expr_type
!= EXPR_FUNCTION
)
3227 temp
= need_full_assumed_size
;
3228 need_full_assumed_size
= 0;
3230 if (!resolve_elemental_actual (expr
, NULL
))
3233 if (omp_workshare_flag
3234 && expr
->value
.function
.esym
3235 && ! gfc_elemental (expr
->value
.function
.esym
))
3237 gfc_error ("User defined non-ELEMENTAL function %qs at %L not allowed "
3238 "in WORKSHARE construct", expr
->value
.function
.esym
->name
,
3243 #define GENERIC_ID expr->value.function.isym->id
3244 else if (expr
->value
.function
.actual
!= NULL
3245 && expr
->value
.function
.isym
!= NULL
3246 && GENERIC_ID
!= GFC_ISYM_LBOUND
3247 && GENERIC_ID
!= GFC_ISYM_LCOBOUND
3248 && GENERIC_ID
!= GFC_ISYM_UCOBOUND
3249 && GENERIC_ID
!= GFC_ISYM_LEN
3250 && GENERIC_ID
!= GFC_ISYM_LOC
3251 && GENERIC_ID
!= GFC_ISYM_C_LOC
3252 && GENERIC_ID
!= GFC_ISYM_PRESENT
)
3254 /* Array intrinsics must also have the last upper bound of an
3255 assumed size array argument. UBOUND and SIZE have to be
3256 excluded from the check if the second argument is anything
3259 for (arg
= expr
->value
.function
.actual
; arg
; arg
= arg
->next
)
3261 if ((GENERIC_ID
== GFC_ISYM_UBOUND
|| GENERIC_ID
== GFC_ISYM_SIZE
)
3262 && arg
== expr
->value
.function
.actual
3263 && arg
->next
!= NULL
&& arg
->next
->expr
)
3265 if (arg
->next
->expr
->expr_type
!= EXPR_CONSTANT
)
3268 if (arg
->next
->name
&& strncmp (arg
->next
->name
, "kind", 4) == 0)
3271 if ((int)mpz_get_si (arg
->next
->expr
->value
.integer
)
3276 if (arg
->expr
!= NULL
3277 && arg
->expr
->rank
> 0
3278 && resolve_assumed_size_actual (arg
->expr
))
3284 need_full_assumed_size
= temp
;
3286 if (!check_pure_function(expr
))
3289 /* Functions without the RECURSIVE attribution are not allowed to
3290 * call themselves. */
3291 if (expr
->value
.function
.esym
&& !expr
->value
.function
.esym
->attr
.recursive
)
3294 esym
= expr
->value
.function
.esym
;
3296 if (is_illegal_recursion (esym
, gfc_current_ns
))
3298 if (esym
->attr
.entry
&& esym
->ns
->entries
)
3299 gfc_error ("ENTRY %qs at %L cannot be called recursively, as"
3300 " function %qs is not RECURSIVE",
3301 esym
->name
, &expr
->where
, esym
->ns
->entries
->sym
->name
);
3303 gfc_error ("Function %qs at %L cannot be called recursively, as it"
3304 " is not RECURSIVE", esym
->name
, &expr
->where
);
3310 /* Character lengths of use associated functions may contains references to
3311 symbols not referenced from the current program unit otherwise. Make sure
3312 those symbols are marked as referenced. */
3314 if (expr
->ts
.type
== BT_CHARACTER
&& expr
->value
.function
.esym
3315 && expr
->value
.function
.esym
->attr
.use_assoc
)
3317 gfc_expr_set_symbols_referenced (expr
->ts
.u
.cl
->length
);
3320 /* Make sure that the expression has a typespec that works. */
3321 if (expr
->ts
.type
== BT_UNKNOWN
)
3323 if (expr
->symtree
->n
.sym
->result
3324 && expr
->symtree
->n
.sym
->result
->ts
.type
!= BT_UNKNOWN
3325 && !expr
->symtree
->n
.sym
->result
->attr
.proc_pointer
)
3326 expr
->ts
= expr
->symtree
->n
.sym
->result
->ts
;
3329 if (!expr
->ref
&& !expr
->value
.function
.isym
)
3331 if (expr
->value
.function
.esym
)
3332 update_current_proc_array_outer_dependency (expr
->value
.function
.esym
);
3334 update_current_proc_array_outer_dependency (sym
);
3337 /* typebound procedure: Assume the worst. */
3338 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3344 /************* Subroutine resolution *************/
3347 pure_subroutine (gfc_symbol
*sym
, const char *name
, locus
*loc
)
3354 gfc_error ("Subroutine call to %qs in FORALL block at %L is not PURE",
3358 else if (gfc_do_concurrent_flag
)
3360 gfc_error ("Subroutine call to %qs in DO CONCURRENT block at %L is not "
3364 else if (gfc_pure (NULL
))
3366 gfc_error ("Subroutine call to %qs at %L is not PURE", name
, loc
);
3370 gfc_unset_implicit_pure (NULL
);
3376 resolve_generic_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3380 if (sym
->attr
.generic
)
3382 s
= gfc_search_interface (sym
->generic
, 1, &c
->ext
.actual
);
3385 c
->resolved_sym
= s
;
3386 if (!pure_subroutine (s
, s
->name
, &c
->loc
))
3391 /* TODO: Need to search for elemental references in generic interface. */
3394 if (sym
->attr
.intrinsic
)
3395 return gfc_intrinsic_sub_interface (c
, 0);
3402 resolve_generic_s (gfc_code
*c
)
3407 sym
= c
->symtree
->n
.sym
;
3411 m
= resolve_generic_s0 (c
, sym
);
3414 else if (m
== MATCH_ERROR
)
3418 if (sym
->ns
->parent
== NULL
)
3420 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3424 if (!generic_sym (sym
))
3428 /* Last ditch attempt. See if the reference is to an intrinsic
3429 that possesses a matching interface. 14.1.2.4 */
3430 sym
= c
->symtree
->n
.sym
;
3432 if (!gfc_is_intrinsic (sym
, 1, c
->loc
))
3434 gfc_error ("There is no specific subroutine for the generic %qs at %L",
3435 sym
->name
, &c
->loc
);
3439 m
= gfc_intrinsic_sub_interface (c
, 0);
3443 gfc_error ("Generic subroutine %qs at %L is not consistent with an "
3444 "intrinsic subroutine interface", sym
->name
, &c
->loc
);
3450 /* Resolve a subroutine call known to be specific. */
3453 resolve_specific_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3457 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
3459 if (sym
->attr
.dummy
)
3461 sym
->attr
.proc
= PROC_DUMMY
;
3465 sym
->attr
.proc
= PROC_EXTERNAL
;
3469 if (sym
->attr
.proc
== PROC_MODULE
|| sym
->attr
.proc
== PROC_INTERNAL
)
3472 if (sym
->attr
.intrinsic
)
3474 m
= gfc_intrinsic_sub_interface (c
, 1);
3478 gfc_error ("Subroutine %qs at %L is INTRINSIC but is not compatible "
3479 "with an intrinsic", sym
->name
, &c
->loc
);
3487 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3489 c
->resolved_sym
= sym
;
3490 if (!pure_subroutine (sym
, sym
->name
, &c
->loc
))
3498 resolve_specific_s (gfc_code
*c
)
3503 sym
= c
->symtree
->n
.sym
;
3507 m
= resolve_specific_s0 (c
, sym
);
3510 if (m
== MATCH_ERROR
)
3513 if (sym
->ns
->parent
== NULL
)
3516 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3522 sym
= c
->symtree
->n
.sym
;
3523 gfc_error ("Unable to resolve the specific subroutine %qs at %L",
3524 sym
->name
, &c
->loc
);
3530 /* Resolve a subroutine call not known to be generic nor specific. */
3533 resolve_unknown_s (gfc_code
*c
)
3537 sym
= c
->symtree
->n
.sym
;
3539 if (sym
->attr
.dummy
)
3541 sym
->attr
.proc
= PROC_DUMMY
;
3545 /* See if we have an intrinsic function reference. */
3547 if (gfc_is_intrinsic (sym
, 1, c
->loc
))
3549 if (gfc_intrinsic_sub_interface (c
, 1) == MATCH_YES
)
3554 /* The reference is to an external name. */
3557 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3559 c
->resolved_sym
= sym
;
3561 return pure_subroutine (sym
, sym
->name
, &c
->loc
);
3565 /* Resolve a subroutine call. Although it was tempting to use the same code
3566 for functions, subroutines and functions are stored differently and this
3567 makes things awkward. */
3570 resolve_call (gfc_code
*c
)
3573 procedure_type ptype
= PROC_INTRINSIC
;
3574 gfc_symbol
*csym
, *sym
;
3575 bool no_formal_args
;
3577 csym
= c
->symtree
? c
->symtree
->n
.sym
: NULL
;
3579 if (csym
&& csym
->ts
.type
!= BT_UNKNOWN
)
3581 gfc_error ("%qs at %L has a type, which is not consistent with "
3582 "the CALL at %L", csym
->name
, &csym
->declared_at
, &c
->loc
);
3586 if (csym
&& gfc_current_ns
->parent
&& csym
->ns
!= gfc_current_ns
)
3589 gfc_find_sym_tree (c
->symtree
->name
, gfc_current_ns
, 1, &st
);
3590 sym
= st
? st
->n
.sym
: NULL
;
3591 if (sym
&& csym
!= sym
3592 && sym
->ns
== gfc_current_ns
3593 && sym
->attr
.flavor
== FL_PROCEDURE
3594 && sym
->attr
.contained
)
3597 if (csym
->attr
.generic
)
3598 c
->symtree
->n
.sym
= sym
;
3601 csym
= c
->symtree
->n
.sym
;
3605 /* If this ia a deferred TBP, c->expr1 will be set. */
3606 if (!c
->expr1
&& csym
)
3608 if (csym
->attr
.abstract
)
3610 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3611 csym
->name
, &c
->loc
);
3615 /* Subroutines without the RECURSIVE attribution are not allowed to
3617 if (is_illegal_recursion (csym
, gfc_current_ns
))
3619 if (csym
->attr
.entry
&& csym
->ns
->entries
)
3620 gfc_error ("ENTRY %qs at %L cannot be called recursively, "
3621 "as subroutine %qs is not RECURSIVE",
3622 csym
->name
, &c
->loc
, csym
->ns
->entries
->sym
->name
);
3624 gfc_error ("SUBROUTINE %qs at %L cannot be called recursively, "
3625 "as it is not RECURSIVE", csym
->name
, &c
->loc
);
3631 /* Switch off assumed size checking and do this again for certain kinds
3632 of procedure, once the procedure itself is resolved. */
3633 need_full_assumed_size
++;
3636 ptype
= csym
->attr
.proc
;
3638 no_formal_args
= csym
&& is_external_proc (csym
)
3639 && gfc_sym_get_dummy_args (csym
) == NULL
;
3640 if (!resolve_actual_arglist (c
->ext
.actual
, ptype
, no_formal_args
))
3643 /* Resume assumed_size checking. */
3644 need_full_assumed_size
--;
3646 /* If external, check for usage. */
3647 if (csym
&& is_external_proc (csym
))
3648 resolve_global_procedure (csym
, &c
->loc
, &c
->ext
.actual
, 1);
3651 if (c
->resolved_sym
== NULL
)
3653 c
->resolved_isym
= NULL
;
3654 switch (procedure_kind (csym
))
3657 t
= resolve_generic_s (c
);
3660 case PTYPE_SPECIFIC
:
3661 t
= resolve_specific_s (c
);
3665 t
= resolve_unknown_s (c
);
3669 gfc_internal_error ("resolve_subroutine(): bad function type");
3673 /* Some checks of elemental subroutine actual arguments. */
3674 if (!resolve_elemental_actual (NULL
, c
))
3678 update_current_proc_array_outer_dependency (csym
);
3680 /* Typebound procedure: Assume the worst. */
3681 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3687 /* Compare the shapes of two arrays that have non-NULL shapes. If both
3688 op1->shape and op2->shape are non-NULL return true if their shapes
3689 match. If both op1->shape and op2->shape are non-NULL return false
3690 if their shapes do not match. If either op1->shape or op2->shape is
3691 NULL, return true. */
3694 compare_shapes (gfc_expr
*op1
, gfc_expr
*op2
)
3701 if (op1
->shape
!= NULL
&& op2
->shape
!= NULL
)
3703 for (i
= 0; i
< op1
->rank
; i
++)
3705 if (mpz_cmp (op1
->shape
[i
], op2
->shape
[i
]) != 0)
3707 gfc_error ("Shapes for operands at %L and %L are not conformable",
3708 &op1
->where
, &op2
->where
);
3718 /* Convert a logical operator to the corresponding bitwise intrinsic call.
3719 For example A .AND. B becomes IAND(A, B). */
3721 logical_to_bitwise (gfc_expr
*e
)
3723 gfc_expr
*tmp
, *op1
, *op2
;
3725 gfc_actual_arglist
*args
= NULL
;
3727 gcc_assert (e
->expr_type
== EXPR_OP
);
3729 isym
= GFC_ISYM_NONE
;
3730 op1
= e
->value
.op
.op1
;
3731 op2
= e
->value
.op
.op2
;
3733 switch (e
->value
.op
.op
)
3736 isym
= GFC_ISYM_NOT
;
3739 isym
= GFC_ISYM_IAND
;
3742 isym
= GFC_ISYM_IOR
;
3744 case INTRINSIC_NEQV
:
3745 isym
= GFC_ISYM_IEOR
;
3748 /* "Bitwise eqv" is just the complement of NEQV === IEOR.
3749 Change the old expression to NEQV, which will get replaced by IEOR,
3750 and wrap it in NOT. */
3751 tmp
= gfc_copy_expr (e
);
3752 tmp
->value
.op
.op
= INTRINSIC_NEQV
;
3753 tmp
= logical_to_bitwise (tmp
);
3754 isym
= GFC_ISYM_NOT
;
3759 gfc_internal_error ("logical_to_bitwise(): Bad intrinsic");
3762 /* Inherit the original operation's operands as arguments. */
3763 args
= gfc_get_actual_arglist ();
3767 args
->next
= gfc_get_actual_arglist ();
3768 args
->next
->expr
= op2
;
3771 /* Convert the expression to a function call. */
3772 e
->expr_type
= EXPR_FUNCTION
;
3773 e
->value
.function
.actual
= args
;
3774 e
->value
.function
.isym
= gfc_intrinsic_function_by_id (isym
);
3775 e
->value
.function
.name
= e
->value
.function
.isym
->name
;
3776 e
->value
.function
.esym
= NULL
;
3778 /* Make up a pre-resolved function call symtree if we need to. */
3779 if (!e
->symtree
|| !e
->symtree
->n
.sym
)
3782 gfc_get_ha_sym_tree (e
->value
.function
.isym
->name
, &e
->symtree
);
3783 sym
= e
->symtree
->n
.sym
;
3785 sym
->attr
.flavor
= FL_PROCEDURE
;
3786 sym
->attr
.function
= 1;
3787 sym
->attr
.elemental
= 1;
3789 sym
->attr
.referenced
= 1;
3790 gfc_intrinsic_symbol (sym
);
3791 gfc_commit_symbol (sym
);
3794 args
->name
= e
->value
.function
.isym
->formal
->name
;
3795 if (e
->value
.function
.isym
->formal
->next
)
3796 args
->next
->name
= e
->value
.function
.isym
->formal
->next
->name
;
3801 /* Recursively append candidate UOP to CANDIDATES. Store the number of
3802 candidates in CANDIDATES_LEN. */
3804 lookup_uop_fuzzy_find_candidates (gfc_symtree
*uop
,
3806 size_t &candidates_len
)
3813 /* Not sure how to properly filter here. Use all for a start.
3814 n.uop.op is NULL for empty interface operators (is that legal?) disregard
3815 these as i suppose they don't make terribly sense. */
3817 if (uop
->n
.uop
->op
!= NULL
)
3818 vec_push (candidates
, candidates_len
, uop
->name
);
3822 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3826 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3829 /* Lookup user-operator OP fuzzily, taking names in UOP into account. */
3832 lookup_uop_fuzzy (const char *op
, gfc_symtree
*uop
)
3834 char **candidates
= NULL
;
3835 size_t candidates_len
= 0;
3836 lookup_uop_fuzzy_find_candidates (uop
, candidates
, candidates_len
);
3837 return gfc_closest_fuzzy_match (op
, candidates
);
3841 /* Callback finding an impure function as an operand to an .and. or
3842 .or. expression. Remember the last function warned about to
3843 avoid double warnings when recursing. */
3846 impure_function_callback (gfc_expr
**e
, int *walk_subtrees ATTRIBUTE_UNUSED
,
3851 static gfc_expr
*last
= NULL
;
3852 bool *found
= (bool *) data
;
3854 if (f
->expr_type
== EXPR_FUNCTION
)
3857 if (f
!= last
&& !gfc_pure_function (f
, &name
)
3858 && !gfc_implicit_pure_function (f
))
3861 gfc_warning (OPT_Wfunction_elimination
,
3862 "Impure function %qs at %L might not be evaluated",
3865 gfc_warning (OPT_Wfunction_elimination
,
3866 "Impure function at %L might not be evaluated",
3876 /* Resolve an operator expression node. This can involve replacing the
3877 operation with a user defined function call. */
3880 resolve_operator (gfc_expr
*e
)
3882 gfc_expr
*op1
, *op2
;
3884 bool dual_locus_error
;
3887 /* Resolve all subnodes-- give them types. */
3889 switch (e
->value
.op
.op
)
3892 if (!gfc_resolve_expr (e
->value
.op
.op2
))
3898 case INTRINSIC_UPLUS
:
3899 case INTRINSIC_UMINUS
:
3900 case INTRINSIC_PARENTHESES
:
3901 if (!gfc_resolve_expr (e
->value
.op
.op1
))
3906 /* Typecheck the new node. */
3908 op1
= e
->value
.op
.op1
;
3909 op2
= e
->value
.op
.op2
;
3910 dual_locus_error
= false;
3912 if ((op1
&& op1
->expr_type
== EXPR_NULL
)
3913 || (op2
&& op2
->expr_type
== EXPR_NULL
))
3915 sprintf (msg
, _("Invalid context for NULL() pointer at %%L"));
3919 switch (e
->value
.op
.op
)
3921 case INTRINSIC_UPLUS
:
3922 case INTRINSIC_UMINUS
:
3923 if (op1
->ts
.type
== BT_INTEGER
3924 || op1
->ts
.type
== BT_REAL
3925 || op1
->ts
.type
== BT_COMPLEX
)
3931 sprintf (msg
, _("Operand of unary numeric operator %%<%s%%> at %%L is %s"),
3932 gfc_op2string (e
->value
.op
.op
), gfc_typename (&e
->ts
));
3935 case INTRINSIC_PLUS
:
3936 case INTRINSIC_MINUS
:
3937 case INTRINSIC_TIMES
:
3938 case INTRINSIC_DIVIDE
:
3939 case INTRINSIC_POWER
:
3940 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
3942 gfc_type_convert_binary (e
, 1);
3946 if (op1
->ts
.type
== BT_DERIVED
|| op2
->ts
.type
== BT_DERIVED
)
3948 _("Unexpected derived-type entities in binary intrinsic "
3949 "numeric operator %%<%s%%> at %%L"),
3950 gfc_op2string (e
->value
.op
.op
));
3953 _("Operands of binary numeric operator %%<%s%%> at %%L are %s/%s"),
3954 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
3955 gfc_typename (&op2
->ts
));
3958 case INTRINSIC_CONCAT
:
3959 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
3960 && op1
->ts
.kind
== op2
->ts
.kind
)
3962 e
->ts
.type
= BT_CHARACTER
;
3963 e
->ts
.kind
= op1
->ts
.kind
;
3968 _("Operands of string concatenation operator at %%L are %s/%s"),
3969 gfc_typename (&op1
->ts
), gfc_typename (&op2
->ts
));
3975 case INTRINSIC_NEQV
:
3976 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
3978 e
->ts
.type
= BT_LOGICAL
;
3979 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
3980 if (op1
->ts
.kind
< e
->ts
.kind
)
3981 gfc_convert_type (op1
, &e
->ts
, 2);
3982 else if (op2
->ts
.kind
< e
->ts
.kind
)
3983 gfc_convert_type (op2
, &e
->ts
, 2);
3985 if (flag_frontend_optimize
&&
3986 (e
->value
.op
.op
== INTRINSIC_AND
|| e
->value
.op
.op
== INTRINSIC_OR
))
3988 /* Warn about short-circuiting
3989 with impure function as second operand. */
3991 gfc_expr_walker (&op2
, impure_function_callback
, &op2_f
);
3996 /* Logical ops on integers become bitwise ops with -fdec. */
3998 && (op1
->ts
.type
== BT_INTEGER
|| op2
->ts
.type
== BT_INTEGER
))
4000 e
->ts
.type
= BT_INTEGER
;
4001 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
4002 if (op1
->ts
.type
!= e
->ts
.type
|| op1
->ts
.kind
!= e
->ts
.kind
)
4003 gfc_convert_type (op1
, &e
->ts
, 1);
4004 if (op2
->ts
.type
!= e
->ts
.type
|| op2
->ts
.kind
!= e
->ts
.kind
)
4005 gfc_convert_type (op2
, &e
->ts
, 1);
4006 e
= logical_to_bitwise (e
);
4007 return resolve_function (e
);
4010 sprintf (msg
, _("Operands of logical operator %%<%s%%> at %%L are %s/%s"),
4011 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
4012 gfc_typename (&op2
->ts
));
4017 /* Logical ops on integers become bitwise ops with -fdec. */
4018 if (flag_dec
&& op1
->ts
.type
== BT_INTEGER
)
4020 e
->ts
.type
= BT_INTEGER
;
4021 e
->ts
.kind
= op1
->ts
.kind
;
4022 e
= logical_to_bitwise (e
);
4023 return resolve_function (e
);
4026 if (op1
->ts
.type
== BT_LOGICAL
)
4028 e
->ts
.type
= BT_LOGICAL
;
4029 e
->ts
.kind
= op1
->ts
.kind
;
4033 sprintf (msg
, _("Operand of .not. operator at %%L is %s"),
4034 gfc_typename (&op1
->ts
));
4038 case INTRINSIC_GT_OS
:
4040 case INTRINSIC_GE_OS
:
4042 case INTRINSIC_LT_OS
:
4044 case INTRINSIC_LE_OS
:
4045 if (op1
->ts
.type
== BT_COMPLEX
|| op2
->ts
.type
== BT_COMPLEX
)
4047 strcpy (msg
, _("COMPLEX quantities cannot be compared at %L"));
4054 case INTRINSIC_EQ_OS
:
4056 case INTRINSIC_NE_OS
:
4057 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
4058 && op1
->ts
.kind
== op2
->ts
.kind
)
4060 e
->ts
.type
= BT_LOGICAL
;
4061 e
->ts
.kind
= gfc_default_logical_kind
;
4065 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
4067 gfc_type_convert_binary (e
, 1);
4069 e
->ts
.type
= BT_LOGICAL
;
4070 e
->ts
.kind
= gfc_default_logical_kind
;
4072 if (warn_compare_reals
)
4074 gfc_intrinsic_op op
= e
->value
.op
.op
;
4076 /* Type conversion has made sure that the types of op1 and op2
4077 agree, so it is only necessary to check the first one. */
4078 if ((op1
->ts
.type
== BT_REAL
|| op1
->ts
.type
== BT_COMPLEX
)
4079 && (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
4080 || op
== INTRINSIC_NE
|| op
== INTRINSIC_NE_OS
))
4084 if (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
)
4085 msg
= "Equality comparison for %s at %L";
4087 msg
= "Inequality comparison for %s at %L";
4089 gfc_warning (OPT_Wcompare_reals
, msg
,
4090 gfc_typename (&op1
->ts
), &op1
->where
);
4097 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
4099 _("Logicals at %%L must be compared with %s instead of %s"),
4100 (e
->value
.op
.op
== INTRINSIC_EQ
4101 || e
->value
.op
.op
== INTRINSIC_EQ_OS
)
4102 ? ".eqv." : ".neqv.", gfc_op2string (e
->value
.op
.op
));
4105 _("Operands of comparison operator %%<%s%%> at %%L are %s/%s"),
4106 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
4107 gfc_typename (&op2
->ts
));
4111 case INTRINSIC_USER
:
4112 if (e
->value
.op
.uop
->op
== NULL
)
4114 const char *name
= e
->value
.op
.uop
->name
;
4115 const char *guessed
;
4116 guessed
= lookup_uop_fuzzy (name
, e
->value
.op
.uop
->ns
->uop_root
);
4118 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L; did you mean '%s'?"),
4121 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L"), name
);
4123 else if (op2
== NULL
)
4124 sprintf (msg
, _("Operand of user operator %%<%s%%> at %%L is %s"),
4125 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
));
4128 sprintf (msg
, _("Operands of user operator %%<%s%%> at %%L are %s/%s"),
4129 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
),
4130 gfc_typename (&op2
->ts
));
4131 e
->value
.op
.uop
->op
->sym
->attr
.referenced
= 1;
4136 case INTRINSIC_PARENTHESES
:
4138 if (e
->ts
.type
== BT_CHARACTER
)
4139 e
->ts
.u
.cl
= op1
->ts
.u
.cl
;
4143 gfc_internal_error ("resolve_operator(): Bad intrinsic");
4146 /* Deal with arrayness of an operand through an operator. */
4150 switch (e
->value
.op
.op
)
4152 case INTRINSIC_PLUS
:
4153 case INTRINSIC_MINUS
:
4154 case INTRINSIC_TIMES
:
4155 case INTRINSIC_DIVIDE
:
4156 case INTRINSIC_POWER
:
4157 case INTRINSIC_CONCAT
:
4161 case INTRINSIC_NEQV
:
4163 case INTRINSIC_EQ_OS
:
4165 case INTRINSIC_NE_OS
:
4167 case INTRINSIC_GT_OS
:
4169 case INTRINSIC_GE_OS
:
4171 case INTRINSIC_LT_OS
:
4173 case INTRINSIC_LE_OS
:
4175 if (op1
->rank
== 0 && op2
->rank
== 0)
4178 if (op1
->rank
== 0 && op2
->rank
!= 0)
4180 e
->rank
= op2
->rank
;
4182 if (e
->shape
== NULL
)
4183 e
->shape
= gfc_copy_shape (op2
->shape
, op2
->rank
);
4186 if (op1
->rank
!= 0 && op2
->rank
== 0)
4188 e
->rank
= op1
->rank
;
4190 if (e
->shape
== NULL
)
4191 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4194 if (op1
->rank
!= 0 && op2
->rank
!= 0)
4196 if (op1
->rank
== op2
->rank
)
4198 e
->rank
= op1
->rank
;
4199 if (e
->shape
== NULL
)
4201 t
= compare_shapes (op1
, op2
);
4205 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4210 /* Allow higher level expressions to work. */
4213 /* Try user-defined operators, and otherwise throw an error. */
4214 dual_locus_error
= true;
4216 _("Inconsistent ranks for operator at %%L and %%L"));
4223 case INTRINSIC_PARENTHESES
:
4225 case INTRINSIC_UPLUS
:
4226 case INTRINSIC_UMINUS
:
4227 /* Simply copy arrayness attribute */
4228 e
->rank
= op1
->rank
;
4230 if (e
->shape
== NULL
)
4231 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4239 /* Attempt to simplify the expression. */
4242 t
= gfc_simplify_expr (e
, 0);
4243 /* Some calls do not succeed in simplification and return false
4244 even though there is no error; e.g. variable references to
4245 PARAMETER arrays. */
4246 if (!gfc_is_constant_expr (e
))
4254 match m
= gfc_extend_expr (e
);
4257 if (m
== MATCH_ERROR
)
4261 if (dual_locus_error
)
4262 gfc_error (msg
, &op1
->where
, &op2
->where
);
4264 gfc_error (msg
, &e
->where
);
4270 /************** Array resolution subroutines **************/
4273 { CMP_LT
, CMP_EQ
, CMP_GT
, CMP_UNKNOWN
};
4275 /* Compare two integer expressions. */
4277 static compare_result
4278 compare_bound (gfc_expr
*a
, gfc_expr
*b
)
4282 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
4283 || b
== NULL
|| b
->expr_type
!= EXPR_CONSTANT
)
4286 /* If either of the types isn't INTEGER, we must have
4287 raised an error earlier. */
4289 if (a
->ts
.type
!= BT_INTEGER
|| b
->ts
.type
!= BT_INTEGER
)
4292 i
= mpz_cmp (a
->value
.integer
, b
->value
.integer
);
4302 /* Compare an integer expression with an integer. */
4304 static compare_result
4305 compare_bound_int (gfc_expr
*a
, int b
)
4309 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4312 if (a
->ts
.type
!= BT_INTEGER
)
4313 gfc_internal_error ("compare_bound_int(): Bad expression");
4315 i
= mpz_cmp_si (a
->value
.integer
, b
);
4325 /* Compare an integer expression with a mpz_t. */
4327 static compare_result
4328 compare_bound_mpz_t (gfc_expr
*a
, mpz_t b
)
4332 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4335 if (a
->ts
.type
!= BT_INTEGER
)
4336 gfc_internal_error ("compare_bound_int(): Bad expression");
4338 i
= mpz_cmp (a
->value
.integer
, b
);
4348 /* Compute the last value of a sequence given by a triplet.
4349 Return 0 if it wasn't able to compute the last value, or if the
4350 sequence if empty, and 1 otherwise. */
4353 compute_last_value_for_triplet (gfc_expr
*start
, gfc_expr
*end
,
4354 gfc_expr
*stride
, mpz_t last
)
4358 if (start
== NULL
|| start
->expr_type
!= EXPR_CONSTANT
4359 || end
== NULL
|| end
->expr_type
!= EXPR_CONSTANT
4360 || (stride
!= NULL
&& stride
->expr_type
!= EXPR_CONSTANT
))
4363 if (start
->ts
.type
!= BT_INTEGER
|| end
->ts
.type
!= BT_INTEGER
4364 || (stride
!= NULL
&& stride
->ts
.type
!= BT_INTEGER
))
4367 if (stride
== NULL
|| compare_bound_int (stride
, 1) == CMP_EQ
)
4369 if (compare_bound (start
, end
) == CMP_GT
)
4371 mpz_set (last
, end
->value
.integer
);
4375 if (compare_bound_int (stride
, 0) == CMP_GT
)
4377 /* Stride is positive */
4378 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) > 0)
4383 /* Stride is negative */
4384 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) < 0)
4389 mpz_sub (rem
, end
->value
.integer
, start
->value
.integer
);
4390 mpz_tdiv_r (rem
, rem
, stride
->value
.integer
);
4391 mpz_sub (last
, end
->value
.integer
, rem
);
4398 /* Compare a single dimension of an array reference to the array
4402 check_dimension (int i
, gfc_array_ref
*ar
, gfc_array_spec
*as
)
4406 if (ar
->dimen_type
[i
] == DIMEN_STAR
)
4408 gcc_assert (ar
->stride
[i
] == NULL
);
4409 /* This implies [*] as [*:] and [*:3] are not possible. */
4410 if (ar
->start
[i
] == NULL
)
4412 gcc_assert (ar
->end
[i
] == NULL
);
4417 /* Given start, end and stride values, calculate the minimum and
4418 maximum referenced indexes. */
4420 switch (ar
->dimen_type
[i
])
4423 case DIMEN_THIS_IMAGE
:
4428 if (compare_bound (ar
->start
[i
], as
->lower
[i
]) == CMP_LT
)
4431 gfc_warning (0, "Array reference at %L is out of bounds "
4432 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4433 mpz_get_si (ar
->start
[i
]->value
.integer
),
4434 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4436 gfc_warning (0, "Array reference at %L is out of bounds "
4437 "(%ld < %ld) in codimension %d", &ar
->c_where
[i
],
4438 mpz_get_si (ar
->start
[i
]->value
.integer
),
4439 mpz_get_si (as
->lower
[i
]->value
.integer
),
4443 if (compare_bound (ar
->start
[i
], as
->upper
[i
]) == CMP_GT
)
4446 gfc_warning (0, "Array reference at %L is out of bounds "
4447 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4448 mpz_get_si (ar
->start
[i
]->value
.integer
),
4449 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4451 gfc_warning (0, "Array reference at %L is out of bounds "
4452 "(%ld > %ld) in codimension %d", &ar
->c_where
[i
],
4453 mpz_get_si (ar
->start
[i
]->value
.integer
),
4454 mpz_get_si (as
->upper
[i
]->value
.integer
),
4463 #define AR_START (ar->start[i] ? ar->start[i] : as->lower[i])
4464 #define AR_END (ar->end[i] ? ar->end[i] : as->upper[i])
4466 compare_result comp_start_end
= compare_bound (AR_START
, AR_END
);
4468 /* Check for zero stride, which is not allowed. */
4469 if (compare_bound_int (ar
->stride
[i
], 0) == CMP_EQ
)
4471 gfc_error ("Illegal stride of zero at %L", &ar
->c_where
[i
]);
4475 /* if start == len || (stride > 0 && start < len)
4476 || (stride < 0 && start > len),
4477 then the array section contains at least one element. In this
4478 case, there is an out-of-bounds access if
4479 (start < lower || start > upper). */
4480 if (compare_bound (AR_START
, AR_END
) == CMP_EQ
4481 || ((compare_bound_int (ar
->stride
[i
], 0) == CMP_GT
4482 || ar
->stride
[i
] == NULL
) && comp_start_end
== CMP_LT
)
4483 || (compare_bound_int (ar
->stride
[i
], 0) == CMP_LT
4484 && comp_start_end
== CMP_GT
))
4486 if (compare_bound (AR_START
, as
->lower
[i
]) == CMP_LT
)
4488 gfc_warning (0, "Lower array reference at %L is out of bounds "
4489 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4490 mpz_get_si (AR_START
->value
.integer
),
4491 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4494 if (compare_bound (AR_START
, as
->upper
[i
]) == CMP_GT
)
4496 gfc_warning (0, "Lower array reference at %L is out of bounds "
4497 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4498 mpz_get_si (AR_START
->value
.integer
),
4499 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4504 /* If we can compute the highest index of the array section,
4505 then it also has to be between lower and upper. */
4506 mpz_init (last_value
);
4507 if (compute_last_value_for_triplet (AR_START
, AR_END
, ar
->stride
[i
],
4510 if (compare_bound_mpz_t (as
->lower
[i
], last_value
) == CMP_GT
)
4512 gfc_warning (0, "Upper array reference at %L is out of bounds "
4513 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4514 mpz_get_si (last_value
),
4515 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4516 mpz_clear (last_value
);
4519 if (compare_bound_mpz_t (as
->upper
[i
], last_value
) == CMP_LT
)
4521 gfc_warning (0, "Upper array reference at %L is out of bounds "
4522 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4523 mpz_get_si (last_value
),
4524 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4525 mpz_clear (last_value
);
4529 mpz_clear (last_value
);
4537 gfc_internal_error ("check_dimension(): Bad array reference");
4544 /* Compare an array reference with an array specification. */
4547 compare_spec_to_ref (gfc_array_ref
*ar
)
4554 /* TODO: Full array sections are only allowed as actual parameters. */
4555 if (as
->type
== AS_ASSUMED_SIZE
4556 && (/*ar->type == AR_FULL
4557 ||*/ (ar
->type
== AR_SECTION
4558 && ar
->dimen_type
[i
] == DIMEN_RANGE
&& ar
->end
[i
] == NULL
)))
4560 gfc_error ("Rightmost upper bound of assumed size array section "
4561 "not specified at %L", &ar
->where
);
4565 if (ar
->type
== AR_FULL
)
4568 if (as
->rank
!= ar
->dimen
)
4570 gfc_error ("Rank mismatch in array reference at %L (%d/%d)",
4571 &ar
->where
, ar
->dimen
, as
->rank
);
4575 /* ar->codimen == 0 is a local array. */
4576 if (as
->corank
!= ar
->codimen
&& ar
->codimen
!= 0)
4578 gfc_error ("Coindex rank mismatch in array reference at %L (%d/%d)",
4579 &ar
->where
, ar
->codimen
, as
->corank
);
4583 for (i
= 0; i
< as
->rank
; i
++)
4584 if (!check_dimension (i
, ar
, as
))
4587 /* Local access has no coarray spec. */
4588 if (ar
->codimen
!= 0)
4589 for (i
= as
->rank
; i
< as
->rank
+ as
->corank
; i
++)
4591 if (ar
->dimen_type
[i
] != DIMEN_ELEMENT
&& !ar
->in_allocate
4592 && ar
->dimen_type
[i
] != DIMEN_THIS_IMAGE
)
4594 gfc_error ("Coindex of codimension %d must be a scalar at %L",
4595 i
+ 1 - as
->rank
, &ar
->where
);
4598 if (!check_dimension (i
, ar
, as
))
4606 /* Resolve one part of an array index. */
4609 gfc_resolve_index_1 (gfc_expr
*index
, int check_scalar
,
4610 int force_index_integer_kind
)
4617 if (!gfc_resolve_expr (index
))
4620 if (check_scalar
&& index
->rank
!= 0)
4622 gfc_error ("Array index at %L must be scalar", &index
->where
);
4626 if (index
->ts
.type
!= BT_INTEGER
&& index
->ts
.type
!= BT_REAL
)
4628 gfc_error ("Array index at %L must be of INTEGER type, found %s",
4629 &index
->where
, gfc_basic_typename (index
->ts
.type
));
4633 if (index
->ts
.type
== BT_REAL
)
4634 if (!gfc_notify_std (GFC_STD_LEGACY
, "REAL array index at %L",
4638 if ((index
->ts
.kind
!= gfc_index_integer_kind
4639 && force_index_integer_kind
)
4640 || index
->ts
.type
!= BT_INTEGER
)
4643 ts
.type
= BT_INTEGER
;
4644 ts
.kind
= gfc_index_integer_kind
;
4646 gfc_convert_type_warn (index
, &ts
, 2, 0);
4652 /* Resolve one part of an array index. */
4655 gfc_resolve_index (gfc_expr
*index
, int check_scalar
)
4657 return gfc_resolve_index_1 (index
, check_scalar
, 1);
4660 /* Resolve a dim argument to an intrinsic function. */
4663 gfc_resolve_dim_arg (gfc_expr
*dim
)
4668 if (!gfc_resolve_expr (dim
))
4673 gfc_error ("Argument dim at %L must be scalar", &dim
->where
);
4678 if (dim
->ts
.type
!= BT_INTEGER
)
4680 gfc_error ("Argument dim at %L must be of INTEGER type", &dim
->where
);
4684 if (dim
->ts
.kind
!= gfc_index_integer_kind
)
4689 ts
.type
= BT_INTEGER
;
4690 ts
.kind
= gfc_index_integer_kind
;
4692 gfc_convert_type_warn (dim
, &ts
, 2, 0);
4698 /* Given an expression that contains array references, update those array
4699 references to point to the right array specifications. While this is
4700 filled in during matching, this information is difficult to save and load
4701 in a module, so we take care of it here.
4703 The idea here is that the original array reference comes from the
4704 base symbol. We traverse the list of reference structures, setting
4705 the stored reference to references. Component references can
4706 provide an additional array specification. */
4709 find_array_spec (gfc_expr
*e
)
4715 if (e
->symtree
->n
.sym
->ts
.type
== BT_CLASS
)
4716 as
= CLASS_DATA (e
->symtree
->n
.sym
)->as
;
4718 as
= e
->symtree
->n
.sym
->as
;
4720 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4725 gfc_internal_error ("find_array_spec(): Missing spec");
4732 c
= ref
->u
.c
.component
;
4733 if (c
->attr
.dimension
)
4736 gfc_internal_error ("find_array_spec(): unused as(1)");
4747 gfc_internal_error ("find_array_spec(): unused as(2)");
4751 /* Resolve an array reference. */
4754 resolve_array_ref (gfc_array_ref
*ar
)
4756 int i
, check_scalar
;
4759 for (i
= 0; i
< ar
->dimen
+ ar
->codimen
; i
++)
4761 check_scalar
= ar
->dimen_type
[i
] == DIMEN_RANGE
;
4763 /* Do not force gfc_index_integer_kind for the start. We can
4764 do fine with any integer kind. This avoids temporary arrays
4765 created for indexing with a vector. */
4766 if (!gfc_resolve_index_1 (ar
->start
[i
], check_scalar
, 0))
4768 if (!gfc_resolve_index (ar
->end
[i
], check_scalar
))
4770 if (!gfc_resolve_index (ar
->stride
[i
], check_scalar
))
4775 if (ar
->dimen_type
[i
] == DIMEN_UNKNOWN
)
4779 ar
->dimen_type
[i
] = DIMEN_ELEMENT
;
4783 ar
->dimen_type
[i
] = DIMEN_VECTOR
;
4784 if (e
->expr_type
== EXPR_VARIABLE
4785 && e
->symtree
->n
.sym
->ts
.type
== BT_DERIVED
)
4786 ar
->start
[i
] = gfc_get_parentheses (e
);
4790 gfc_error ("Array index at %L is an array of rank %d",
4791 &ar
->c_where
[i
], e
->rank
);
4795 /* Fill in the upper bound, which may be lower than the
4796 specified one for something like a(2:10:5), which is
4797 identical to a(2:7:5). Only relevant for strides not equal
4798 to one. Don't try a division by zero. */
4799 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4800 && ar
->stride
[i
] != NULL
&& ar
->stride
[i
]->expr_type
== EXPR_CONSTANT
4801 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 1L) != 0
4802 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 0L) != 0)
4806 if (gfc_ref_dimen_size (ar
, i
, &size
, &end
))
4808 if (ar
->end
[i
] == NULL
)
4811 gfc_get_constant_expr (BT_INTEGER
, gfc_index_integer_kind
,
4813 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4815 else if (ar
->end
[i
]->ts
.type
== BT_INTEGER
4816 && ar
->end
[i
]->expr_type
== EXPR_CONSTANT
)
4818 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4829 if (ar
->type
== AR_FULL
)
4831 if (ar
->as
->rank
== 0)
4832 ar
->type
= AR_ELEMENT
;
4834 /* Make sure array is the same as array(:,:), this way
4835 we don't need to special case all the time. */
4836 ar
->dimen
= ar
->as
->rank
;
4837 for (i
= 0; i
< ar
->dimen
; i
++)
4839 ar
->dimen_type
[i
] = DIMEN_RANGE
;
4841 gcc_assert (ar
->start
[i
] == NULL
);
4842 gcc_assert (ar
->end
[i
] == NULL
);
4843 gcc_assert (ar
->stride
[i
] == NULL
);
4847 /* If the reference type is unknown, figure out what kind it is. */
4849 if (ar
->type
== AR_UNKNOWN
)
4851 ar
->type
= AR_ELEMENT
;
4852 for (i
= 0; i
< ar
->dimen
; i
++)
4853 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4854 || ar
->dimen_type
[i
] == DIMEN_VECTOR
)
4856 ar
->type
= AR_SECTION
;
4861 if (!ar
->as
->cray_pointee
&& !compare_spec_to_ref (ar
))
4864 if (ar
->as
->corank
&& ar
->codimen
== 0)
4867 ar
->codimen
= ar
->as
->corank
;
4868 for (n
= ar
->dimen
; n
< ar
->dimen
+ ar
->codimen
; n
++)
4869 ar
->dimen_type
[n
] = DIMEN_THIS_IMAGE
;
4877 resolve_substring (gfc_ref
*ref
)
4879 int k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
4881 if (ref
->u
.ss
.start
!= NULL
)
4883 if (!gfc_resolve_expr (ref
->u
.ss
.start
))
4886 if (ref
->u
.ss
.start
->ts
.type
!= BT_INTEGER
)
4888 gfc_error ("Substring start index at %L must be of type INTEGER",
4889 &ref
->u
.ss
.start
->where
);
4893 if (ref
->u
.ss
.start
->rank
!= 0)
4895 gfc_error ("Substring start index at %L must be scalar",
4896 &ref
->u
.ss
.start
->where
);
4900 if (compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_LT
4901 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4902 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4904 gfc_error ("Substring start index at %L is less than one",
4905 &ref
->u
.ss
.start
->where
);
4910 if (ref
->u
.ss
.end
!= NULL
)
4912 if (!gfc_resolve_expr (ref
->u
.ss
.end
))
4915 if (ref
->u
.ss
.end
->ts
.type
!= BT_INTEGER
)
4917 gfc_error ("Substring end index at %L must be of type INTEGER",
4918 &ref
->u
.ss
.end
->where
);
4922 if (ref
->u
.ss
.end
->rank
!= 0)
4924 gfc_error ("Substring end index at %L must be scalar",
4925 &ref
->u
.ss
.end
->where
);
4929 if (ref
->u
.ss
.length
!= NULL
4930 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_GT
4931 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4932 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4934 gfc_error ("Substring end index at %L exceeds the string length",
4935 &ref
->u
.ss
.start
->where
);
4939 if (compare_bound_mpz_t (ref
->u
.ss
.end
,
4940 gfc_integer_kinds
[k
].huge
) == CMP_GT
4941 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4942 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4944 gfc_error ("Substring end index at %L is too large",
4945 &ref
->u
.ss
.end
->where
);
4954 /* This function supplies missing substring charlens. */
4957 gfc_resolve_substring_charlen (gfc_expr
*e
)
4960 gfc_expr
*start
, *end
;
4961 gfc_typespec
*ts
= NULL
;
4963 for (char_ref
= e
->ref
; char_ref
; char_ref
= char_ref
->next
)
4965 if (char_ref
->type
== REF_SUBSTRING
)
4967 if (char_ref
->type
== REF_COMPONENT
)
4968 ts
= &char_ref
->u
.c
.component
->ts
;
4974 gcc_assert (char_ref
->next
== NULL
);
4978 if (e
->ts
.u
.cl
->length
)
4979 gfc_free_expr (e
->ts
.u
.cl
->length
);
4980 else if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
->attr
.dummy
)
4984 e
->ts
.type
= BT_CHARACTER
;
4985 e
->ts
.kind
= gfc_default_character_kind
;
4988 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
4990 if (char_ref
->u
.ss
.start
)
4991 start
= gfc_copy_expr (char_ref
->u
.ss
.start
);
4993 start
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 1);
4995 if (char_ref
->u
.ss
.end
)
4996 end
= gfc_copy_expr (char_ref
->u
.ss
.end
);
4997 else if (e
->expr_type
== EXPR_VARIABLE
)
5000 ts
= &e
->symtree
->n
.sym
->ts
;
5001 end
= gfc_copy_expr (ts
->u
.cl
->length
);
5008 gfc_free_expr (start
);
5009 gfc_free_expr (end
);
5013 /* Length = (end - start + 1). */
5014 e
->ts
.u
.cl
->length
= gfc_subtract (end
, start
);
5015 e
->ts
.u
.cl
->length
= gfc_add (e
->ts
.u
.cl
->length
,
5016 gfc_get_int_expr (gfc_charlen_int_kind
,
5019 /* F2008, 6.4.1: Both the starting point and the ending point shall
5020 be within the range 1, 2, ..., n unless the starting point exceeds
5021 the ending point, in which case the substring has length zero. */
5023 if (mpz_cmp_si (e
->ts
.u
.cl
->length
->value
.integer
, 0) < 0)
5024 mpz_set_si (e
->ts
.u
.cl
->length
->value
.integer
, 0);
5026 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5027 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5029 /* Make sure that the length is simplified. */
5030 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 1);
5031 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5035 /* Resolve subtype references. */
5038 resolve_ref (gfc_expr
*expr
)
5040 int current_part_dimension
, n_components
, seen_part_dimension
;
5043 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5044 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.as
== NULL
)
5046 find_array_spec (expr
);
5050 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5054 if (!resolve_array_ref (&ref
->u
.ar
))
5062 if (!resolve_substring (ref
))
5067 /* Check constraints on part references. */
5069 current_part_dimension
= 0;
5070 seen_part_dimension
= 0;
5073 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5078 switch (ref
->u
.ar
.type
)
5081 /* Coarray scalar. */
5082 if (ref
->u
.ar
.as
->rank
== 0)
5084 current_part_dimension
= 0;
5089 current_part_dimension
= 1;
5093 current_part_dimension
= 0;
5097 gfc_internal_error ("resolve_ref(): Bad array reference");
5103 if (current_part_dimension
|| seen_part_dimension
)
5106 if (ref
->u
.c
.component
->attr
.pointer
5107 || ref
->u
.c
.component
->attr
.proc_pointer
5108 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5109 && CLASS_DATA (ref
->u
.c
.component
)->attr
.pointer
))
5111 gfc_error ("Component to the right of a part reference "
5112 "with nonzero rank must not have the POINTER "
5113 "attribute at %L", &expr
->where
);
5116 else if (ref
->u
.c
.component
->attr
.allocatable
5117 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5118 && CLASS_DATA (ref
->u
.c
.component
)->attr
.allocatable
))
5121 gfc_error ("Component to the right of a part reference "
5122 "with nonzero rank must not have the ALLOCATABLE "
5123 "attribute at %L", &expr
->where
);
5135 if (((ref
->type
== REF_COMPONENT
&& n_components
> 1)
5136 || ref
->next
== NULL
)
5137 && current_part_dimension
5138 && seen_part_dimension
)
5140 gfc_error ("Two or more part references with nonzero rank must "
5141 "not be specified at %L", &expr
->where
);
5145 if (ref
->type
== REF_COMPONENT
)
5147 if (current_part_dimension
)
5148 seen_part_dimension
= 1;
5150 /* reset to make sure */
5151 current_part_dimension
= 0;
5159 /* Given an expression, determine its shape. This is easier than it sounds.
5160 Leaves the shape array NULL if it is not possible to determine the shape. */
5163 expression_shape (gfc_expr
*e
)
5165 mpz_t array
[GFC_MAX_DIMENSIONS
];
5168 if (e
->rank
<= 0 || e
->shape
!= NULL
)
5171 for (i
= 0; i
< e
->rank
; i
++)
5172 if (!gfc_array_dimen_size (e
, i
, &array
[i
]))
5175 e
->shape
= gfc_get_shape (e
->rank
);
5177 memcpy (e
->shape
, array
, e
->rank
* sizeof (mpz_t
));
5182 for (i
--; i
>= 0; i
--)
5183 mpz_clear (array
[i
]);
5187 /* Given a variable expression node, compute the rank of the expression by
5188 examining the base symbol and any reference structures it may have. */
5191 expression_rank (gfc_expr
*e
)
5196 /* Just to make sure, because EXPR_COMPCALL's also have an e->ref and that
5197 could lead to serious confusion... */
5198 gcc_assert (e
->expr_type
!= EXPR_COMPCALL
);
5202 if (e
->expr_type
== EXPR_ARRAY
)
5204 /* Constructors can have a rank different from one via RESHAPE(). */
5206 if (e
->symtree
== NULL
)
5212 e
->rank
= (e
->symtree
->n
.sym
->as
== NULL
)
5213 ? 0 : e
->symtree
->n
.sym
->as
->rank
;
5219 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5221 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.proc_pointer
5222 && ref
->u
.c
.component
->attr
.function
&& !ref
->next
)
5223 rank
= ref
->u
.c
.component
->as
? ref
->u
.c
.component
->as
->rank
: 0;
5225 if (ref
->type
!= REF_ARRAY
)
5228 if (ref
->u
.ar
.type
== AR_FULL
)
5230 rank
= ref
->u
.ar
.as
->rank
;
5234 if (ref
->u
.ar
.type
== AR_SECTION
)
5236 /* Figure out the rank of the section. */
5238 gfc_internal_error ("expression_rank(): Two array specs");
5240 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
5241 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_RANGE
5242 || ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
)
5252 expression_shape (e
);
5257 add_caf_get_intrinsic (gfc_expr
*e
)
5259 gfc_expr
*wrapper
, *tmp_expr
;
5263 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5264 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5269 for (n
= ref
->u
.ar
.dimen
; n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
5270 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_ELEMENT
)
5273 tmp_expr
= XCNEW (gfc_expr
);
5275 wrapper
= gfc_build_intrinsic_call (gfc_current_ns
, GFC_ISYM_CAF_GET
,
5276 "caf_get", tmp_expr
->where
, 1, tmp_expr
);
5277 wrapper
->ts
= e
->ts
;
5278 wrapper
->rank
= e
->rank
;
5280 wrapper
->shape
= gfc_copy_shape (e
->shape
, e
->rank
);
5287 remove_caf_get_intrinsic (gfc_expr
*e
)
5289 gcc_assert (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
5290 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
);
5291 gfc_expr
*e2
= e
->value
.function
.actual
->expr
;
5292 e
->value
.function
.actual
->expr
= NULL
;
5293 gfc_free_actual_arglist (e
->value
.function
.actual
);
5294 gfc_free_shape (&e
->shape
, e
->rank
);
5300 /* Resolve a variable expression. */
5303 resolve_variable (gfc_expr
*e
)
5310 if (e
->symtree
== NULL
)
5312 sym
= e
->symtree
->n
.sym
;
5314 /* Use same check as for TYPE(*) below; this check has to be before TYPE(*)
5315 as ts.type is set to BT_ASSUMED in resolve_symbol. */
5316 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
5318 if (!actual_arg
|| inquiry_argument
)
5320 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may only "
5321 "be used as actual argument", sym
->name
, &e
->where
);
5325 /* TS 29113, 407b. */
5326 else if (e
->ts
.type
== BT_ASSUMED
)
5330 gfc_error ("Assumed-type variable %s at %L may only be used "
5331 "as actual argument", sym
->name
, &e
->where
);
5334 else if (inquiry_argument
&& !first_actual_arg
)
5336 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5337 for all inquiry functions in resolve_function; the reason is
5338 that the function-name resolution happens too late in that
5340 gfc_error ("Assumed-type variable %s at %L as actual argument to "
5341 "an inquiry function shall be the first argument",
5342 sym
->name
, &e
->where
);
5346 /* TS 29113, C535b. */
5347 else if ((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5348 && CLASS_DATA (sym
)->as
5349 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5350 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5351 && sym
->as
->type
== AS_ASSUMED_RANK
))
5355 gfc_error ("Assumed-rank variable %s at %L may only be used as "
5356 "actual argument", sym
->name
, &e
->where
);
5359 else if (inquiry_argument
&& !first_actual_arg
)
5361 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5362 for all inquiry functions in resolve_function; the reason is
5363 that the function-name resolution happens too late in that
5365 gfc_error ("Assumed-rank variable %s at %L as actual argument "
5366 "to an inquiry function shall be the first argument",
5367 sym
->name
, &e
->where
);
5372 if ((sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
)) && e
->ref
5373 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5374 && e
->ref
->next
== NULL
))
5376 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall not have "
5377 "a subobject reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5380 /* TS 29113, 407b. */
5381 else if (e
->ts
.type
== BT_ASSUMED
&& e
->ref
5382 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5383 && e
->ref
->next
== NULL
))
5385 gfc_error ("Assumed-type variable %s at %L shall not have a subobject "
5386 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5390 /* TS 29113, C535b. */
5391 if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5392 && CLASS_DATA (sym
)->as
5393 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5394 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5395 && sym
->as
->type
== AS_ASSUMED_RANK
))
5397 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5398 && e
->ref
->next
== NULL
))
5400 gfc_error ("Assumed-rank variable %s at %L shall not have a subobject "
5401 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5405 /* For variables that are used in an associate (target => object) where
5406 the object's basetype is array valued while the target is scalar,
5407 the ts' type of the component refs is still array valued, which
5408 can't be translated that way. */
5409 if (sym
->assoc
&& e
->rank
== 0 && e
->ref
&& sym
->ts
.type
== BT_CLASS
5410 && sym
->assoc
->target
->ts
.type
== BT_CLASS
5411 && CLASS_DATA (sym
->assoc
->target
)->as
)
5413 gfc_ref
*ref
= e
->ref
;
5419 ref
->u
.c
.sym
= sym
->ts
.u
.derived
;
5420 /* Stop the loop. */
5430 /* If this is an associate-name, it may be parsed with an array reference
5431 in error even though the target is scalar. Fail directly in this case.
5432 TODO Understand why class scalar expressions must be excluded. */
5433 if (sym
->assoc
&& !(sym
->ts
.type
== BT_CLASS
&& e
->rank
== 0))
5435 if (sym
->ts
.type
== BT_CLASS
)
5436 gfc_fix_class_refs (e
);
5437 if (!sym
->attr
.dimension
&& e
->ref
&& e
->ref
->type
== REF_ARRAY
)
5441 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.generic
)
5442 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
5444 /* On the other hand, the parser may not have known this is an array;
5445 in this case, we have to add a FULL reference. */
5446 if (sym
->assoc
&& sym
->attr
.dimension
&& !e
->ref
)
5448 e
->ref
= gfc_get_ref ();
5449 e
->ref
->type
= REF_ARRAY
;
5450 e
->ref
->u
.ar
.type
= AR_FULL
;
5451 e
->ref
->u
.ar
.dimen
= 0;
5454 /* Like above, but for class types, where the checking whether an array
5455 ref is present is more complicated. Furthermore make sure not to add
5456 the full array ref to _vptr or _len refs. */
5457 if (sym
->assoc
&& sym
->ts
.type
== BT_CLASS
5458 && CLASS_DATA (sym
)->attr
.dimension
5459 && (e
->ts
.type
!= BT_DERIVED
|| !e
->ts
.u
.derived
->attr
.vtype
))
5461 gfc_ref
*ref
, *newref
;
5463 newref
= gfc_get_ref ();
5464 newref
->type
= REF_ARRAY
;
5465 newref
->u
.ar
.type
= AR_FULL
;
5466 newref
->u
.ar
.dimen
= 0;
5467 /* Because this is an associate var and the first ref either is a ref to
5468 the _data component or not, no traversal of the ref chain is
5469 needed. The array ref needs to be inserted after the _data ref,
5470 or when that is not present, which may happend for polymorphic
5471 types, then at the first position. */
5475 else if (ref
->type
== REF_COMPONENT
5476 && strcmp ("_data", ref
->u
.c
.component
->name
) == 0)
5478 if (!ref
->next
|| ref
->next
->type
!= REF_ARRAY
)
5480 newref
->next
= ref
->next
;
5484 /* Array ref present already. */
5485 gfc_free_ref_list (newref
);
5487 else if (ref
->type
== REF_ARRAY
)
5488 /* Array ref present already. */
5489 gfc_free_ref_list (newref
);
5497 if (e
->ref
&& !resolve_ref (e
))
5500 if (sym
->attr
.flavor
== FL_PROCEDURE
5501 && (!sym
->attr
.function
5502 || (sym
->attr
.function
&& sym
->result
5503 && sym
->result
->attr
.proc_pointer
5504 && !sym
->result
->attr
.function
)))
5506 e
->ts
.type
= BT_PROCEDURE
;
5507 goto resolve_procedure
;
5510 if (sym
->ts
.type
!= BT_UNKNOWN
)
5511 gfc_variable_attr (e
, &e
->ts
);
5512 else if (sym
->attr
.flavor
== FL_PROCEDURE
5513 && sym
->attr
.function
&& sym
->result
5514 && sym
->result
->ts
.type
!= BT_UNKNOWN
5515 && sym
->result
->attr
.proc_pointer
)
5516 e
->ts
= sym
->result
->ts
;
5519 /* Must be a simple variable reference. */
5520 if (!gfc_set_default_type (sym
, 1, sym
->ns
))
5525 if (check_assumed_size_reference (sym
, e
))
5528 /* Deal with forward references to entries during gfc_resolve_code, to
5529 satisfy, at least partially, 12.5.2.5. */
5530 if (gfc_current_ns
->entries
5531 && current_entry_id
== sym
->entry_id
5534 && cs_base
->current
->op
!= EXEC_ENTRY
)
5536 gfc_entry_list
*entry
;
5537 gfc_formal_arglist
*formal
;
5539 bool seen
, saved_specification_expr
;
5541 /* If the symbol is a dummy... */
5542 if (sym
->attr
.dummy
&& sym
->ns
== gfc_current_ns
)
5544 entry
= gfc_current_ns
->entries
;
5547 /* ...test if the symbol is a parameter of previous entries. */
5548 for (; entry
&& entry
->id
<= current_entry_id
; entry
= entry
->next
)
5549 for (formal
= entry
->sym
->formal
; formal
; formal
= formal
->next
)
5551 if (formal
->sym
&& sym
->name
== formal
->sym
->name
)
5558 /* If it has not been seen as a dummy, this is an error. */
5561 if (specification_expr
)
5562 gfc_error ("Variable %qs, used in a specification expression"
5563 ", is referenced at %L before the ENTRY statement "
5564 "in which it is a parameter",
5565 sym
->name
, &cs_base
->current
->loc
);
5567 gfc_error ("Variable %qs is used at %L before the ENTRY "
5568 "statement in which it is a parameter",
5569 sym
->name
, &cs_base
->current
->loc
);
5574 /* Now do the same check on the specification expressions. */
5575 saved_specification_expr
= specification_expr
;
5576 specification_expr
= true;
5577 if (sym
->ts
.type
== BT_CHARACTER
5578 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
5582 for (n
= 0; n
< sym
->as
->rank
; n
++)
5584 if (!gfc_resolve_expr (sym
->as
->lower
[n
]))
5586 if (!gfc_resolve_expr (sym
->as
->upper
[n
]))
5589 specification_expr
= saved_specification_expr
;
5592 /* Update the symbol's entry level. */
5593 sym
->entry_id
= current_entry_id
+ 1;
5596 /* If a symbol has been host_associated mark it. This is used latter,
5597 to identify if aliasing is possible via host association. */
5598 if (sym
->attr
.flavor
== FL_VARIABLE
5599 && gfc_current_ns
->parent
5600 && (gfc_current_ns
->parent
== sym
->ns
5601 || (gfc_current_ns
->parent
->parent
5602 && gfc_current_ns
->parent
->parent
== sym
->ns
)))
5603 sym
->attr
.host_assoc
= 1;
5605 if (gfc_current_ns
->proc_name
5606 && sym
->attr
.dimension
5607 && (sym
->ns
!= gfc_current_ns
5608 || sym
->attr
.use_assoc
5609 || sym
->attr
.in_common
))
5610 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
5613 if (t
&& !resolve_procedure_expression (e
))
5616 /* F2008, C617 and C1229. */
5617 if (!inquiry_argument
&& (e
->ts
.type
== BT_CLASS
|| e
->ts
.type
== BT_DERIVED
)
5618 && gfc_is_coindexed (e
))
5620 gfc_ref
*ref
, *ref2
= NULL
;
5622 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5624 if (ref
->type
== REF_COMPONENT
)
5626 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5630 for ( ; ref
; ref
= ref
->next
)
5631 if (ref
->type
== REF_COMPONENT
)
5634 /* Expression itself is not coindexed object. */
5635 if (ref
&& e
->ts
.type
== BT_CLASS
)
5637 gfc_error ("Polymorphic subobject of coindexed object at %L",
5642 /* Expression itself is coindexed object. */
5646 c
= ref2
? ref2
->u
.c
.component
: e
->symtree
->n
.sym
->components
;
5647 for ( ; c
; c
= c
->next
)
5648 if (c
->attr
.allocatable
&& c
->ts
.type
== BT_CLASS
)
5650 gfc_error ("Coindexed object with polymorphic allocatable "
5651 "subcomponent at %L", &e
->where
);
5659 expression_rank (e
);
5661 if (t
&& flag_coarray
== GFC_FCOARRAY_LIB
&& gfc_is_coindexed (e
))
5662 add_caf_get_intrinsic (e
);
5664 /* Simplify cases where access to a parameter array results in a
5665 single constant. Suppress errors since those will have been
5666 issued before, as warnings. */
5667 if (e
->rank
== 0 && sym
->as
&& sym
->attr
.flavor
== FL_PARAMETER
)
5669 gfc_push_suppress_errors ();
5670 gfc_simplify_expr (e
, 1);
5671 gfc_pop_suppress_errors ();
5678 /* Checks to see that the correct symbol has been host associated.
5679 The only situation where this arises is that in which a twice
5680 contained function is parsed after the host association is made.
5681 Therefore, on detecting this, change the symbol in the expression
5682 and convert the array reference into an actual arglist if the old
5683 symbol is a variable. */
5685 check_host_association (gfc_expr
*e
)
5687 gfc_symbol
*sym
, *old_sym
;
5691 gfc_actual_arglist
*arg
, *tail
= NULL
;
5692 bool retval
= e
->expr_type
== EXPR_FUNCTION
;
5694 /* If the expression is the result of substitution in
5695 interface.c(gfc_extend_expr) because there is no way in
5696 which the host association can be wrong. */
5697 if (e
->symtree
== NULL
5698 || e
->symtree
->n
.sym
== NULL
5699 || e
->user_operator
)
5702 old_sym
= e
->symtree
->n
.sym
;
5704 if (gfc_current_ns
->parent
5705 && old_sym
->ns
!= gfc_current_ns
)
5707 /* Use the 'USE' name so that renamed module symbols are
5708 correctly handled. */
5709 gfc_find_symbol (e
->symtree
->name
, gfc_current_ns
, 1, &sym
);
5711 if (sym
&& old_sym
!= sym
5712 && sym
->ts
.type
== old_sym
->ts
.type
5713 && sym
->attr
.flavor
== FL_PROCEDURE
5714 && sym
->attr
.contained
)
5716 /* Clear the shape, since it might not be valid. */
5717 gfc_free_shape (&e
->shape
, e
->rank
);
5719 /* Give the expression the right symtree! */
5720 gfc_find_sym_tree (e
->symtree
->name
, NULL
, 1, &st
);
5721 gcc_assert (st
!= NULL
);
5723 if (old_sym
->attr
.flavor
== FL_PROCEDURE
5724 || e
->expr_type
== EXPR_FUNCTION
)
5726 /* Original was function so point to the new symbol, since
5727 the actual argument list is already attached to the
5729 e
->value
.function
.esym
= NULL
;
5734 /* Original was variable so convert array references into
5735 an actual arglist. This does not need any checking now
5736 since resolve_function will take care of it. */
5737 e
->value
.function
.actual
= NULL
;
5738 e
->expr_type
= EXPR_FUNCTION
;
5741 /* Ambiguity will not arise if the array reference is not
5742 the last reference. */
5743 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5744 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
5747 gcc_assert (ref
->type
== REF_ARRAY
);
5749 /* Grab the start expressions from the array ref and
5750 copy them into actual arguments. */
5751 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
5753 arg
= gfc_get_actual_arglist ();
5754 arg
->expr
= gfc_copy_expr (ref
->u
.ar
.start
[n
]);
5755 if (e
->value
.function
.actual
== NULL
)
5756 tail
= e
->value
.function
.actual
= arg
;
5764 /* Dump the reference list and set the rank. */
5765 gfc_free_ref_list (e
->ref
);
5767 e
->rank
= sym
->as
? sym
->as
->rank
: 0;
5770 gfc_resolve_expr (e
);
5774 /* This might have changed! */
5775 return e
->expr_type
== EXPR_FUNCTION
;
5780 gfc_resolve_character_operator (gfc_expr
*e
)
5782 gfc_expr
*op1
= e
->value
.op
.op1
;
5783 gfc_expr
*op2
= e
->value
.op
.op2
;
5784 gfc_expr
*e1
= NULL
;
5785 gfc_expr
*e2
= NULL
;
5787 gcc_assert (e
->value
.op
.op
== INTRINSIC_CONCAT
);
5789 if (op1
->ts
.u
.cl
&& op1
->ts
.u
.cl
->length
)
5790 e1
= gfc_copy_expr (op1
->ts
.u
.cl
->length
);
5791 else if (op1
->expr_type
== EXPR_CONSTANT
)
5792 e1
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5793 op1
->value
.character
.length
);
5795 if (op2
->ts
.u
.cl
&& op2
->ts
.u
.cl
->length
)
5796 e2
= gfc_copy_expr (op2
->ts
.u
.cl
->length
);
5797 else if (op2
->expr_type
== EXPR_CONSTANT
)
5798 e2
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5799 op2
->value
.character
.length
);
5801 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5811 e
->ts
.u
.cl
->length
= gfc_add (e1
, e2
);
5812 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5813 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5814 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 0);
5815 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5821 /* Ensure that an character expression has a charlen and, if possible, a
5822 length expression. */
5825 fixup_charlen (gfc_expr
*e
)
5827 /* The cases fall through so that changes in expression type and the need
5828 for multiple fixes are picked up. In all circumstances, a charlen should
5829 be available for the middle end to hang a backend_decl on. */
5830 switch (e
->expr_type
)
5833 gfc_resolve_character_operator (e
);
5837 if (e
->expr_type
== EXPR_ARRAY
)
5838 gfc_resolve_character_array_constructor (e
);
5841 case EXPR_SUBSTRING
:
5842 if (!e
->ts
.u
.cl
&& e
->ref
)
5843 gfc_resolve_substring_charlen (e
);
5848 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5855 /* Update an actual argument to include the passed-object for type-bound
5856 procedures at the right position. */
5858 static gfc_actual_arglist
*
5859 update_arglist_pass (gfc_actual_arglist
* lst
, gfc_expr
* po
, unsigned argpos
,
5862 gcc_assert (argpos
> 0);
5866 gfc_actual_arglist
* result
;
5868 result
= gfc_get_actual_arglist ();
5872 result
->name
= name
;
5878 lst
->next
= update_arglist_pass (lst
->next
, po
, argpos
- 1, name
);
5880 lst
= update_arglist_pass (NULL
, po
, argpos
- 1, name
);
5885 /* Extract the passed-object from an EXPR_COMPCALL (a copy of it). */
5888 extract_compcall_passed_object (gfc_expr
* e
)
5892 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
5894 if (e
->value
.compcall
.base_object
)
5895 po
= gfc_copy_expr (e
->value
.compcall
.base_object
);
5898 po
= gfc_get_expr ();
5899 po
->expr_type
= EXPR_VARIABLE
;
5900 po
->symtree
= e
->symtree
;
5901 po
->ref
= gfc_copy_ref (e
->ref
);
5902 po
->where
= e
->where
;
5905 if (!gfc_resolve_expr (po
))
5912 /* Update the arglist of an EXPR_COMPCALL expression to include the
5916 update_compcall_arglist (gfc_expr
* e
)
5919 gfc_typebound_proc
* tbp
;
5921 tbp
= e
->value
.compcall
.tbp
;
5926 po
= extract_compcall_passed_object (e
);
5930 if (tbp
->nopass
|| e
->value
.compcall
.ignore_pass
)
5936 if (tbp
->pass_arg_num
<= 0)
5939 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
5947 /* Extract the passed object from a PPC call (a copy of it). */
5950 extract_ppc_passed_object (gfc_expr
*e
)
5955 po
= gfc_get_expr ();
5956 po
->expr_type
= EXPR_VARIABLE
;
5957 po
->symtree
= e
->symtree
;
5958 po
->ref
= gfc_copy_ref (e
->ref
);
5959 po
->where
= e
->where
;
5961 /* Remove PPC reference. */
5963 while ((*ref
)->next
)
5964 ref
= &(*ref
)->next
;
5965 gfc_free_ref_list (*ref
);
5968 if (!gfc_resolve_expr (po
))
5975 /* Update the actual arglist of a procedure pointer component to include the
5979 update_ppc_arglist (gfc_expr
* e
)
5983 gfc_typebound_proc
* tb
;
5985 ppc
= gfc_get_proc_ptr_comp (e
);
5993 else if (tb
->nopass
)
5996 po
= extract_ppc_passed_object (e
);
6003 gfc_error ("Passed-object at %L must be scalar", &e
->where
);
6008 if (po
->ts
.type
== BT_DERIVED
&& po
->ts
.u
.derived
->attr
.abstract
)
6010 gfc_error ("Base object for procedure-pointer component call at %L is of"
6011 " ABSTRACT type %qs", &e
->where
, po
->ts
.u
.derived
->name
);
6015 gcc_assert (tb
->pass_arg_num
> 0);
6016 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6024 /* Check that the object a TBP is called on is valid, i.e. it must not be
6025 of ABSTRACT type (as in subobject%abstract_parent%tbp()). */
6028 check_typebound_baseobject (gfc_expr
* e
)
6031 bool return_value
= false;
6033 base
= extract_compcall_passed_object (e
);
6037 gcc_assert (base
->ts
.type
== BT_DERIVED
|| base
->ts
.type
== BT_CLASS
);
6039 if (base
->ts
.type
== BT_CLASS
&& !gfc_expr_attr (base
).class_ok
)
6043 if (base
->ts
.type
== BT_DERIVED
&& base
->ts
.u
.derived
->attr
.abstract
)
6045 gfc_error ("Base object for type-bound procedure call at %L is of"
6046 " ABSTRACT type %qs", &e
->where
, base
->ts
.u
.derived
->name
);
6050 /* F08:C1230. If the procedure called is NOPASS,
6051 the base object must be scalar. */
6052 if (e
->value
.compcall
.tbp
->nopass
&& base
->rank
!= 0)
6054 gfc_error ("Base object for NOPASS type-bound procedure call at %L must"
6055 " be scalar", &e
->where
);
6059 return_value
= true;
6062 gfc_free_expr (base
);
6063 return return_value
;
6067 /* Resolve a call to a type-bound procedure, either function or subroutine,
6068 statically from the data in an EXPR_COMPCALL expression. The adapted
6069 arglist and the target-procedure symtree are returned. */
6072 resolve_typebound_static (gfc_expr
* e
, gfc_symtree
** target
,
6073 gfc_actual_arglist
** actual
)
6075 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6076 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6078 /* Update the actual arglist for PASS. */
6079 if (!update_compcall_arglist (e
))
6082 *actual
= e
->value
.compcall
.actual
;
6083 *target
= e
->value
.compcall
.tbp
->u
.specific
;
6085 gfc_free_ref_list (e
->ref
);
6087 e
->value
.compcall
.actual
= NULL
;
6089 /* If we find a deferred typebound procedure, check for derived types
6090 that an overriding typebound procedure has not been missed. */
6091 if (e
->value
.compcall
.name
6092 && !e
->value
.compcall
.tbp
->non_overridable
6093 && e
->value
.compcall
.base_object
6094 && e
->value
.compcall
.base_object
->ts
.type
== BT_DERIVED
)
6097 gfc_symbol
*derived
;
6099 /* Use the derived type of the base_object. */
6100 derived
= e
->value
.compcall
.base_object
->ts
.u
.derived
;
6103 /* If necessary, go through the inheritance chain. */
6104 while (!st
&& derived
)
6106 /* Look for the typebound procedure 'name'. */
6107 if (derived
->f2k_derived
&& derived
->f2k_derived
->tb_sym_root
)
6108 st
= gfc_find_symtree (derived
->f2k_derived
->tb_sym_root
,
6109 e
->value
.compcall
.name
);
6111 derived
= gfc_get_derived_super_type (derived
);
6114 /* Now find the specific name in the derived type namespace. */
6115 if (st
&& st
->n
.tb
&& st
->n
.tb
->u
.specific
)
6116 gfc_find_sym_tree (st
->n
.tb
->u
.specific
->name
,
6117 derived
->ns
, 1, &st
);
6125 /* Get the ultimate declared type from an expression. In addition,
6126 return the last class/derived type reference and the copy of the
6127 reference list. If check_types is set true, derived types are
6128 identified as well as class references. */
6130 get_declared_from_expr (gfc_ref
**class_ref
, gfc_ref
**new_ref
,
6131 gfc_expr
*e
, bool check_types
)
6133 gfc_symbol
*declared
;
6140 *new_ref
= gfc_copy_ref (e
->ref
);
6142 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
6144 if (ref
->type
!= REF_COMPONENT
)
6147 if ((ref
->u
.c
.component
->ts
.type
== BT_CLASS
6148 || (check_types
&& gfc_bt_struct (ref
->u
.c
.component
->ts
.type
)))
6149 && ref
->u
.c
.component
->attr
.flavor
!= FL_PROCEDURE
)
6151 declared
= ref
->u
.c
.component
->ts
.u
.derived
;
6157 if (declared
== NULL
)
6158 declared
= e
->symtree
->n
.sym
->ts
.u
.derived
;
6164 /* Given an EXPR_COMPCALL calling a GENERIC typebound procedure, figure out
6165 which of the specific bindings (if any) matches the arglist and transform
6166 the expression into a call of that binding. */
6169 resolve_typebound_generic_call (gfc_expr
* e
, const char **name
)
6171 gfc_typebound_proc
* genproc
;
6172 const char* genname
;
6174 gfc_symbol
*derived
;
6176 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6177 genname
= e
->value
.compcall
.name
;
6178 genproc
= e
->value
.compcall
.tbp
;
6180 if (!genproc
->is_generic
)
6183 /* Try the bindings on this type and in the inheritance hierarchy. */
6184 for (; genproc
; genproc
= genproc
->overridden
)
6188 gcc_assert (genproc
->is_generic
);
6189 for (g
= genproc
->u
.generic
; g
; g
= g
->next
)
6192 gfc_actual_arglist
* args
;
6195 gcc_assert (g
->specific
);
6197 if (g
->specific
->error
)
6200 target
= g
->specific
->u
.specific
->n
.sym
;
6202 /* Get the right arglist by handling PASS/NOPASS. */
6203 args
= gfc_copy_actual_arglist (e
->value
.compcall
.actual
);
6204 if (!g
->specific
->nopass
)
6207 po
= extract_compcall_passed_object (e
);
6210 gfc_free_actual_arglist (args
);
6214 gcc_assert (g
->specific
->pass_arg_num
> 0);
6215 gcc_assert (!g
->specific
->error
);
6216 args
= update_arglist_pass (args
, po
, g
->specific
->pass_arg_num
,
6217 g
->specific
->pass_arg
);
6219 resolve_actual_arglist (args
, target
->attr
.proc
,
6220 is_external_proc (target
)
6221 && gfc_sym_get_dummy_args (target
) == NULL
);
6223 /* Check if this arglist matches the formal. */
6224 matches
= gfc_arglist_matches_symbol (&args
, target
);
6226 /* Clean up and break out of the loop if we've found it. */
6227 gfc_free_actual_arglist (args
);
6230 e
->value
.compcall
.tbp
= g
->specific
;
6231 genname
= g
->specific_st
->name
;
6232 /* Pass along the name for CLASS methods, where the vtab
6233 procedure pointer component has to be referenced. */
6241 /* Nothing matching found! */
6242 gfc_error ("Found no matching specific binding for the call to the GENERIC"
6243 " %qs at %L", genname
, &e
->where
);
6247 /* Make sure that we have the right specific instance for the name. */
6248 derived
= get_declared_from_expr (NULL
, NULL
, e
, true);
6250 st
= gfc_find_typebound_proc (derived
, NULL
, genname
, true, &e
->where
);
6252 e
->value
.compcall
.tbp
= st
->n
.tb
;
6258 /* Resolve a call to a type-bound subroutine. */
6261 resolve_typebound_call (gfc_code
* c
, const char **name
, bool *overridable
)
6263 gfc_actual_arglist
* newactual
;
6264 gfc_symtree
* target
;
6266 /* Check that's really a SUBROUTINE. */
6267 if (!c
->expr1
->value
.compcall
.tbp
->subroutine
)
6269 if (!c
->expr1
->value
.compcall
.tbp
->is_generic
6270 && c
->expr1
->value
.compcall
.tbp
->u
.specific
6271 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
6272 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
->attr
.subroutine
)
6273 c
->expr1
->value
.compcall
.tbp
->subroutine
= 1;
6276 gfc_error ("%qs at %L should be a SUBROUTINE",
6277 c
->expr1
->value
.compcall
.name
, &c
->loc
);
6282 if (!check_typebound_baseobject (c
->expr1
))
6285 /* Pass along the name for CLASS methods, where the vtab
6286 procedure pointer component has to be referenced. */
6288 *name
= c
->expr1
->value
.compcall
.name
;
6290 if (!resolve_typebound_generic_call (c
->expr1
, name
))
6293 /* Pass along the NON_OVERRIDABLE attribute of the specific TBP. */
6295 *overridable
= !c
->expr1
->value
.compcall
.tbp
->non_overridable
;
6297 /* Transform into an ordinary EXEC_CALL for now. */
6299 if (!resolve_typebound_static (c
->expr1
, &target
, &newactual
))
6302 c
->ext
.actual
= newactual
;
6303 c
->symtree
= target
;
6304 c
->op
= (c
->expr1
->value
.compcall
.assign
? EXEC_ASSIGN_CALL
: EXEC_CALL
);
6306 gcc_assert (!c
->expr1
->ref
&& !c
->expr1
->value
.compcall
.actual
);
6308 gfc_free_expr (c
->expr1
);
6309 c
->expr1
= gfc_get_expr ();
6310 c
->expr1
->expr_type
= EXPR_FUNCTION
;
6311 c
->expr1
->symtree
= target
;
6312 c
->expr1
->where
= c
->loc
;
6314 return resolve_call (c
);
6318 /* Resolve a component-call expression. */
6320 resolve_compcall (gfc_expr
* e
, const char **name
)
6322 gfc_actual_arglist
* newactual
;
6323 gfc_symtree
* target
;
6325 /* Check that's really a FUNCTION. */
6326 if (!e
->value
.compcall
.tbp
->function
)
6328 gfc_error ("%qs at %L should be a FUNCTION",
6329 e
->value
.compcall
.name
, &e
->where
);
6333 /* These must not be assign-calls! */
6334 gcc_assert (!e
->value
.compcall
.assign
);
6336 if (!check_typebound_baseobject (e
))
6339 /* Pass along the name for CLASS methods, where the vtab
6340 procedure pointer component has to be referenced. */
6342 *name
= e
->value
.compcall
.name
;
6344 if (!resolve_typebound_generic_call (e
, name
))
6346 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6348 /* Take the rank from the function's symbol. */
6349 if (e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
)
6350 e
->rank
= e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
->rank
;
6352 /* For now, we simply transform it into an EXPR_FUNCTION call with the same
6353 arglist to the TBP's binding target. */
6355 if (!resolve_typebound_static (e
, &target
, &newactual
))
6358 e
->value
.function
.actual
= newactual
;
6359 e
->value
.function
.name
= NULL
;
6360 e
->value
.function
.esym
= target
->n
.sym
;
6361 e
->value
.function
.isym
= NULL
;
6362 e
->symtree
= target
;
6363 e
->ts
= target
->n
.sym
->ts
;
6364 e
->expr_type
= EXPR_FUNCTION
;
6366 /* Resolution is not necessary if this is a class subroutine; this
6367 function only has to identify the specific proc. Resolution of
6368 the call will be done next in resolve_typebound_call. */
6369 return gfc_resolve_expr (e
);
6373 static bool resolve_fl_derived (gfc_symbol
*sym
);
6376 /* Resolve a typebound function, or 'method'. First separate all
6377 the non-CLASS references by calling resolve_compcall directly. */
6380 resolve_typebound_function (gfc_expr
* e
)
6382 gfc_symbol
*declared
;
6394 /* Deal with typebound operators for CLASS objects. */
6395 expr
= e
->value
.compcall
.base_object
;
6396 overridable
= !e
->value
.compcall
.tbp
->non_overridable
;
6397 if (expr
&& expr
->ts
.type
== BT_CLASS
&& e
->value
.compcall
.name
)
6399 /* If the base_object is not a variable, the corresponding actual
6400 argument expression must be stored in e->base_expression so
6401 that the corresponding tree temporary can be used as the base
6402 object in gfc_conv_procedure_call. */
6403 if (expr
->expr_type
!= EXPR_VARIABLE
)
6405 gfc_actual_arglist
*args
;
6407 for (args
= e
->value
.function
.actual
; args
; args
= args
->next
)
6409 if (expr
== args
->expr
)
6414 /* Since the typebound operators are generic, we have to ensure
6415 that any delays in resolution are corrected and that the vtab
6418 declared
= ts
.u
.derived
;
6419 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6420 if (c
->ts
.u
.derived
== NULL
)
6421 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6423 if (!resolve_compcall (e
, &name
))
6426 /* Use the generic name if it is there. */
6427 name
= name
? name
: e
->value
.function
.esym
->name
;
6428 e
->symtree
= expr
->symtree
;
6429 e
->ref
= gfc_copy_ref (expr
->ref
);
6430 get_declared_from_expr (&class_ref
, NULL
, e
, false);
6432 /* Trim away the extraneous references that emerge from nested
6433 use of interface.c (extend_expr). */
6434 if (class_ref
&& class_ref
->next
)
6436 gfc_free_ref_list (class_ref
->next
);
6437 class_ref
->next
= NULL
;
6439 else if (e
->ref
&& !class_ref
&& expr
->ts
.type
!= BT_CLASS
)
6441 gfc_free_ref_list (e
->ref
);
6445 gfc_add_vptr_component (e
);
6446 gfc_add_component_ref (e
, name
);
6447 e
->value
.function
.esym
= NULL
;
6448 if (expr
->expr_type
!= EXPR_VARIABLE
)
6449 e
->base_expr
= expr
;
6454 return resolve_compcall (e
, NULL
);
6456 if (!resolve_ref (e
))
6459 /* Get the CLASS declared type. */
6460 declared
= get_declared_from_expr (&class_ref
, &new_ref
, e
, true);
6462 if (!resolve_fl_derived (declared
))
6465 /* Weed out cases of the ultimate component being a derived type. */
6466 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6467 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6469 gfc_free_ref_list (new_ref
);
6470 return resolve_compcall (e
, NULL
);
6473 c
= gfc_find_component (declared
, "_data", true, true, NULL
);
6474 declared
= c
->ts
.u
.derived
;
6476 /* Treat the call as if it is a typebound procedure, in order to roll
6477 out the correct name for the specific function. */
6478 if (!resolve_compcall (e
, &name
))
6480 gfc_free_ref_list (new_ref
);
6487 /* Convert the expression to a procedure pointer component call. */
6488 e
->value
.function
.esym
= NULL
;
6494 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6495 gfc_add_vptr_component (e
);
6496 gfc_add_component_ref (e
, name
);
6498 /* Recover the typespec for the expression. This is really only
6499 necessary for generic procedures, where the additional call
6500 to gfc_add_component_ref seems to throw the collection of the
6501 correct typespec. */
6505 gfc_free_ref_list (new_ref
);
6510 /* Resolve a typebound subroutine, or 'method'. First separate all
6511 the non-CLASS references by calling resolve_typebound_call
6515 resolve_typebound_subroutine (gfc_code
*code
)
6517 gfc_symbol
*declared
;
6527 st
= code
->expr1
->symtree
;
6529 /* Deal with typebound operators for CLASS objects. */
6530 expr
= code
->expr1
->value
.compcall
.base_object
;
6531 overridable
= !code
->expr1
->value
.compcall
.tbp
->non_overridable
;
6532 if (expr
&& expr
->ts
.type
== BT_CLASS
&& code
->expr1
->value
.compcall
.name
)
6534 /* If the base_object is not a variable, the corresponding actual
6535 argument expression must be stored in e->base_expression so
6536 that the corresponding tree temporary can be used as the base
6537 object in gfc_conv_procedure_call. */
6538 if (expr
->expr_type
!= EXPR_VARIABLE
)
6540 gfc_actual_arglist
*args
;
6542 args
= code
->expr1
->value
.function
.actual
;
6543 for (; args
; args
= args
->next
)
6544 if (expr
== args
->expr
)
6548 /* Since the typebound operators are generic, we have to ensure
6549 that any delays in resolution are corrected and that the vtab
6551 declared
= expr
->ts
.u
.derived
;
6552 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6553 if (c
->ts
.u
.derived
== NULL
)
6554 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6556 if (!resolve_typebound_call (code
, &name
, NULL
))
6559 /* Use the generic name if it is there. */
6560 name
= name
? name
: code
->expr1
->value
.function
.esym
->name
;
6561 code
->expr1
->symtree
= expr
->symtree
;
6562 code
->expr1
->ref
= gfc_copy_ref (expr
->ref
);
6564 /* Trim away the extraneous references that emerge from nested
6565 use of interface.c (extend_expr). */
6566 get_declared_from_expr (&class_ref
, NULL
, code
->expr1
, false);
6567 if (class_ref
&& class_ref
->next
)
6569 gfc_free_ref_list (class_ref
->next
);
6570 class_ref
->next
= NULL
;
6572 else if (code
->expr1
->ref
&& !class_ref
)
6574 gfc_free_ref_list (code
->expr1
->ref
);
6575 code
->expr1
->ref
= NULL
;
6578 /* Now use the procedure in the vtable. */
6579 gfc_add_vptr_component (code
->expr1
);
6580 gfc_add_component_ref (code
->expr1
, name
);
6581 code
->expr1
->value
.function
.esym
= NULL
;
6582 if (expr
->expr_type
!= EXPR_VARIABLE
)
6583 code
->expr1
->base_expr
= expr
;
6588 return resolve_typebound_call (code
, NULL
, NULL
);
6590 if (!resolve_ref (code
->expr1
))
6593 /* Get the CLASS declared type. */
6594 get_declared_from_expr (&class_ref
, &new_ref
, code
->expr1
, true);
6596 /* Weed out cases of the ultimate component being a derived type. */
6597 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6598 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6600 gfc_free_ref_list (new_ref
);
6601 return resolve_typebound_call (code
, NULL
, NULL
);
6604 if (!resolve_typebound_call (code
, &name
, &overridable
))
6606 gfc_free_ref_list (new_ref
);
6609 ts
= code
->expr1
->ts
;
6613 /* Convert the expression to a procedure pointer component call. */
6614 code
->expr1
->value
.function
.esym
= NULL
;
6615 code
->expr1
->symtree
= st
;
6618 code
->expr1
->ref
= new_ref
;
6620 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6621 gfc_add_vptr_component (code
->expr1
);
6622 gfc_add_component_ref (code
->expr1
, name
);
6624 /* Recover the typespec for the expression. This is really only
6625 necessary for generic procedures, where the additional call
6626 to gfc_add_component_ref seems to throw the collection of the
6627 correct typespec. */
6628 code
->expr1
->ts
= ts
;
6631 gfc_free_ref_list (new_ref
);
6637 /* Resolve a CALL to a Procedure Pointer Component (Subroutine). */
6640 resolve_ppc_call (gfc_code
* c
)
6642 gfc_component
*comp
;
6644 comp
= gfc_get_proc_ptr_comp (c
->expr1
);
6645 gcc_assert (comp
!= NULL
);
6647 c
->resolved_sym
= c
->expr1
->symtree
->n
.sym
;
6648 c
->expr1
->expr_type
= EXPR_VARIABLE
;
6650 if (!comp
->attr
.subroutine
)
6651 gfc_add_subroutine (&comp
->attr
, comp
->name
, &c
->expr1
->where
);
6653 if (!resolve_ref (c
->expr1
))
6656 if (!update_ppc_arglist (c
->expr1
))
6659 c
->ext
.actual
= c
->expr1
->value
.compcall
.actual
;
6661 if (!resolve_actual_arglist (c
->ext
.actual
, comp
->attr
.proc
,
6662 !(comp
->ts
.interface
6663 && comp
->ts
.interface
->formal
)))
6666 if (!pure_subroutine (comp
->ts
.interface
, comp
->name
, &c
->expr1
->where
))
6669 gfc_ppc_use (comp
, &c
->expr1
->value
.compcall
.actual
, &c
->expr1
->where
);
6675 /* Resolve a Function Call to a Procedure Pointer Component (Function). */
6678 resolve_expr_ppc (gfc_expr
* e
)
6680 gfc_component
*comp
;
6682 comp
= gfc_get_proc_ptr_comp (e
);
6683 gcc_assert (comp
!= NULL
);
6685 /* Convert to EXPR_FUNCTION. */
6686 e
->expr_type
= EXPR_FUNCTION
;
6687 e
->value
.function
.isym
= NULL
;
6688 e
->value
.function
.actual
= e
->value
.compcall
.actual
;
6690 if (comp
->as
!= NULL
)
6691 e
->rank
= comp
->as
->rank
;
6693 if (!comp
->attr
.function
)
6694 gfc_add_function (&comp
->attr
, comp
->name
, &e
->where
);
6696 if (!resolve_ref (e
))
6699 if (!resolve_actual_arglist (e
->value
.function
.actual
, comp
->attr
.proc
,
6700 !(comp
->ts
.interface
6701 && comp
->ts
.interface
->formal
)))
6704 if (!update_ppc_arglist (e
))
6707 if (!check_pure_function(e
))
6710 gfc_ppc_use (comp
, &e
->value
.compcall
.actual
, &e
->where
);
6717 gfc_is_expandable_expr (gfc_expr
*e
)
6719 gfc_constructor
*con
;
6721 if (e
->expr_type
== EXPR_ARRAY
)
6723 /* Traverse the constructor looking for variables that are flavor
6724 parameter. Parameters must be expanded since they are fully used at
6726 con
= gfc_constructor_first (e
->value
.constructor
);
6727 for (; con
; con
= gfc_constructor_next (con
))
6729 if (con
->expr
->expr_type
== EXPR_VARIABLE
6730 && con
->expr
->symtree
6731 && (con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
6732 || con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_VARIABLE
))
6734 if (con
->expr
->expr_type
== EXPR_ARRAY
6735 && gfc_is_expandable_expr (con
->expr
))
6744 /* Sometimes variables in specification expressions of the result
6745 of module procedures in submodules wind up not being the 'real'
6746 dummy. Find this, if possible, in the namespace of the first
6750 fixup_unique_dummy (gfc_expr
*e
)
6752 gfc_symtree
*st
= NULL
;
6753 gfc_symbol
*s
= NULL
;
6755 if (e
->symtree
->n
.sym
->ns
->proc_name
6756 && e
->symtree
->n
.sym
->ns
->proc_name
->formal
)
6757 s
= e
->symtree
->n
.sym
->ns
->proc_name
->formal
->sym
;
6760 st
= gfc_find_symtree (s
->ns
->sym_root
, e
->symtree
->n
.sym
->name
);
6763 && st
->n
.sym
!= NULL
6764 && st
->n
.sym
->attr
.dummy
)
6768 /* Resolve an expression. That is, make sure that types of operands agree
6769 with their operators, intrinsic operators are converted to function calls
6770 for overloaded types and unresolved function references are resolved. */
6773 gfc_resolve_expr (gfc_expr
*e
)
6776 bool inquiry_save
, actual_arg_save
, first_actual_arg_save
;
6781 /* inquiry_argument only applies to variables. */
6782 inquiry_save
= inquiry_argument
;
6783 actual_arg_save
= actual_arg
;
6784 first_actual_arg_save
= first_actual_arg
;
6786 if (e
->expr_type
!= EXPR_VARIABLE
)
6788 inquiry_argument
= false;
6790 first_actual_arg
= false;
6792 else if (e
->symtree
!= NULL
6793 && *e
->symtree
->name
== '@'
6794 && e
->symtree
->n
.sym
->attr
.dummy
)
6796 /* Deal with submodule specification expressions that are not
6797 found to be referenced in module.c(read_cleanup). */
6798 fixup_unique_dummy (e
);
6801 switch (e
->expr_type
)
6804 t
= resolve_operator (e
);
6810 if (check_host_association (e
))
6811 t
= resolve_function (e
);
6813 t
= resolve_variable (e
);
6815 if (e
->ts
.type
== BT_CHARACTER
&& e
->ts
.u
.cl
== NULL
&& e
->ref
6816 && e
->ref
->type
!= REF_SUBSTRING
)
6817 gfc_resolve_substring_charlen (e
);
6822 t
= resolve_typebound_function (e
);
6825 case EXPR_SUBSTRING
:
6826 t
= resolve_ref (e
);
6835 t
= resolve_expr_ppc (e
);
6840 if (!resolve_ref (e
))
6843 t
= gfc_resolve_array_constructor (e
);
6844 /* Also try to expand a constructor. */
6847 expression_rank (e
);
6848 if (gfc_is_constant_expr (e
) || gfc_is_expandable_expr (e
))
6849 gfc_expand_constructor (e
, false);
6852 /* This provides the opportunity for the length of constructors with
6853 character valued function elements to propagate the string length
6854 to the expression. */
6855 if (t
&& e
->ts
.type
== BT_CHARACTER
)
6857 /* For efficiency, we call gfc_expand_constructor for BT_CHARACTER
6858 here rather then add a duplicate test for it above. */
6859 gfc_expand_constructor (e
, false);
6860 t
= gfc_resolve_character_array_constructor (e
);
6865 case EXPR_STRUCTURE
:
6866 t
= resolve_ref (e
);
6870 t
= resolve_structure_cons (e
, 0);
6874 t
= gfc_simplify_expr (e
, 0);
6878 gfc_internal_error ("gfc_resolve_expr(): Bad expression type");
6881 if (e
->ts
.type
== BT_CHARACTER
&& t
&& !e
->ts
.u
.cl
)
6884 inquiry_argument
= inquiry_save
;
6885 actual_arg
= actual_arg_save
;
6886 first_actual_arg
= first_actual_arg_save
;
6892 /* Resolve an expression from an iterator. They must be scalar and have
6893 INTEGER or (optionally) REAL type. */
6896 gfc_resolve_iterator_expr (gfc_expr
*expr
, bool real_ok
,
6897 const char *name_msgid
)
6899 if (!gfc_resolve_expr (expr
))
6902 if (expr
->rank
!= 0)
6904 gfc_error ("%s at %L must be a scalar", _(name_msgid
), &expr
->where
);
6908 if (expr
->ts
.type
!= BT_INTEGER
)
6910 if (expr
->ts
.type
== BT_REAL
)
6913 return gfc_notify_std (GFC_STD_F95_DEL
,
6914 "%s at %L must be integer",
6915 _(name_msgid
), &expr
->where
);
6918 gfc_error ("%s at %L must be INTEGER", _(name_msgid
),
6925 gfc_error ("%s at %L must be INTEGER", _(name_msgid
), &expr
->where
);
6933 /* Resolve the expressions in an iterator structure. If REAL_OK is
6934 false allow only INTEGER type iterators, otherwise allow REAL types.
6935 Set own_scope to true for ac-implied-do and data-implied-do as those
6936 have a separate scope such that, e.g., a INTENT(IN) doesn't apply. */
6939 gfc_resolve_iterator (gfc_iterator
*iter
, bool real_ok
, bool own_scope
)
6941 if (!gfc_resolve_iterator_expr (iter
->var
, real_ok
, "Loop variable"))
6944 if (!gfc_check_vardef_context (iter
->var
, false, false, own_scope
,
6945 _("iterator variable")))
6948 if (!gfc_resolve_iterator_expr (iter
->start
, real_ok
,
6949 "Start expression in DO loop"))
6952 if (!gfc_resolve_iterator_expr (iter
->end
, real_ok
,
6953 "End expression in DO loop"))
6956 if (!gfc_resolve_iterator_expr (iter
->step
, real_ok
,
6957 "Step expression in DO loop"))
6960 if (iter
->step
->expr_type
== EXPR_CONSTANT
)
6962 if ((iter
->step
->ts
.type
== BT_INTEGER
6963 && mpz_cmp_ui (iter
->step
->value
.integer
, 0) == 0)
6964 || (iter
->step
->ts
.type
== BT_REAL
6965 && mpfr_sgn (iter
->step
->value
.real
) == 0))
6967 gfc_error ("Step expression in DO loop at %L cannot be zero",
6968 &iter
->step
->where
);
6973 /* Convert start, end, and step to the same type as var. */
6974 if (iter
->start
->ts
.kind
!= iter
->var
->ts
.kind
6975 || iter
->start
->ts
.type
!= iter
->var
->ts
.type
)
6976 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
6978 if (iter
->end
->ts
.kind
!= iter
->var
->ts
.kind
6979 || iter
->end
->ts
.type
!= iter
->var
->ts
.type
)
6980 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
6982 if (iter
->step
->ts
.kind
!= iter
->var
->ts
.kind
6983 || iter
->step
->ts
.type
!= iter
->var
->ts
.type
)
6984 gfc_convert_type (iter
->step
, &iter
->var
->ts
, 1);
6986 if (iter
->start
->expr_type
== EXPR_CONSTANT
6987 && iter
->end
->expr_type
== EXPR_CONSTANT
6988 && iter
->step
->expr_type
== EXPR_CONSTANT
)
6991 if (iter
->start
->ts
.type
== BT_INTEGER
)
6993 sgn
= mpz_cmp_ui (iter
->step
->value
.integer
, 0);
6994 cmp
= mpz_cmp (iter
->end
->value
.integer
, iter
->start
->value
.integer
);
6998 sgn
= mpfr_sgn (iter
->step
->value
.real
);
6999 cmp
= mpfr_cmp (iter
->end
->value
.real
, iter
->start
->value
.real
);
7001 if (warn_zerotrip
&& ((sgn
> 0 && cmp
< 0) || (sgn
< 0 && cmp
> 0)))
7002 gfc_warning (OPT_Wzerotrip
,
7003 "DO loop at %L will be executed zero times",
7004 &iter
->step
->where
);
7007 if (iter
->end
->expr_type
== EXPR_CONSTANT
7008 && iter
->end
->ts
.type
== BT_INTEGER
7009 && iter
->step
->expr_type
== EXPR_CONSTANT
7010 && iter
->step
->ts
.type
== BT_INTEGER
7011 && (mpz_cmp_si (iter
->step
->value
.integer
, -1L) == 0
7012 || mpz_cmp_si (iter
->step
->value
.integer
, 1L) == 0))
7014 bool is_step_positive
= mpz_cmp_ui (iter
->step
->value
.integer
, 1) == 0;
7015 int k
= gfc_validate_kind (BT_INTEGER
, iter
->end
->ts
.kind
, false);
7017 if (is_step_positive
7018 && mpz_cmp (iter
->end
->value
.integer
, gfc_integer_kinds
[k
].huge
) == 0)
7019 gfc_warning (OPT_Wundefined_do_loop
,
7020 "DO loop at %L is undefined as it overflows",
7021 &iter
->step
->where
);
7022 else if (!is_step_positive
7023 && mpz_cmp (iter
->end
->value
.integer
,
7024 gfc_integer_kinds
[k
].min_int
) == 0)
7025 gfc_warning (OPT_Wundefined_do_loop
,
7026 "DO loop at %L is undefined as it underflows",
7027 &iter
->step
->where
);
7034 /* Traversal function for find_forall_index. f == 2 signals that
7035 that variable itself is not to be checked - only the references. */
7038 forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int *f
)
7040 if (expr
->expr_type
!= EXPR_VARIABLE
)
7043 /* A scalar assignment */
7044 if (!expr
->ref
|| *f
== 1)
7046 if (expr
->symtree
->n
.sym
== sym
)
7058 /* Check whether the FORALL index appears in the expression or not.
7059 Returns true if SYM is found in EXPR. */
7062 find_forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int f
)
7064 if (gfc_traverse_expr (expr
, sym
, forall_index
, f
))
7071 /* Resolve a list of FORALL iterators. The FORALL index-name is constrained
7072 to be a scalar INTEGER variable. The subscripts and stride are scalar
7073 INTEGERs, and if stride is a constant it must be nonzero.
7074 Furthermore "A subscript or stride in a forall-triplet-spec shall
7075 not contain a reference to any index-name in the
7076 forall-triplet-spec-list in which it appears." (7.5.4.1) */
7079 resolve_forall_iterators (gfc_forall_iterator
*it
)
7081 gfc_forall_iterator
*iter
, *iter2
;
7083 for (iter
= it
; iter
; iter
= iter
->next
)
7085 if (gfc_resolve_expr (iter
->var
)
7086 && (iter
->var
->ts
.type
!= BT_INTEGER
|| iter
->var
->rank
!= 0))
7087 gfc_error ("FORALL index-name at %L must be a scalar INTEGER",
7090 if (gfc_resolve_expr (iter
->start
)
7091 && (iter
->start
->ts
.type
!= BT_INTEGER
|| iter
->start
->rank
!= 0))
7092 gfc_error ("FORALL start expression at %L must be a scalar INTEGER",
7093 &iter
->start
->where
);
7094 if (iter
->var
->ts
.kind
!= iter
->start
->ts
.kind
)
7095 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7097 if (gfc_resolve_expr (iter
->end
)
7098 && (iter
->end
->ts
.type
!= BT_INTEGER
|| iter
->end
->rank
!= 0))
7099 gfc_error ("FORALL end expression at %L must be a scalar INTEGER",
7101 if (iter
->var
->ts
.kind
!= iter
->end
->ts
.kind
)
7102 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7104 if (gfc_resolve_expr (iter
->stride
))
7106 if (iter
->stride
->ts
.type
!= BT_INTEGER
|| iter
->stride
->rank
!= 0)
7107 gfc_error ("FORALL stride expression at %L must be a scalar %s",
7108 &iter
->stride
->where
, "INTEGER");
7110 if (iter
->stride
->expr_type
== EXPR_CONSTANT
7111 && mpz_cmp_ui (iter
->stride
->value
.integer
, 0) == 0)
7112 gfc_error ("FORALL stride expression at %L cannot be zero",
7113 &iter
->stride
->where
);
7115 if (iter
->var
->ts
.kind
!= iter
->stride
->ts
.kind
)
7116 gfc_convert_type (iter
->stride
, &iter
->var
->ts
, 1);
7119 for (iter
= it
; iter
; iter
= iter
->next
)
7120 for (iter2
= iter
; iter2
; iter2
= iter2
->next
)
7122 if (find_forall_index (iter2
->start
, iter
->var
->symtree
->n
.sym
, 0)
7123 || find_forall_index (iter2
->end
, iter
->var
->symtree
->n
.sym
, 0)
7124 || find_forall_index (iter2
->stride
, iter
->var
->symtree
->n
.sym
, 0))
7125 gfc_error ("FORALL index %qs may not appear in triplet "
7126 "specification at %L", iter
->var
->symtree
->name
,
7127 &iter2
->start
->where
);
7132 /* Given a pointer to a symbol that is a derived type, see if it's
7133 inaccessible, i.e. if it's defined in another module and the components are
7134 PRIVATE. The search is recursive if necessary. Returns zero if no
7135 inaccessible components are found, nonzero otherwise. */
7138 derived_inaccessible (gfc_symbol
*sym
)
7142 if (sym
->attr
.use_assoc
&& sym
->attr
.private_comp
)
7145 for (c
= sym
->components
; c
; c
= c
->next
)
7147 /* Prevent an infinite loop through this function. */
7148 if (c
->ts
.type
== BT_DERIVED
&& c
->attr
.pointer
7149 && sym
== c
->ts
.u
.derived
)
7152 if (c
->ts
.type
== BT_DERIVED
&& derived_inaccessible (c
->ts
.u
.derived
))
7160 /* Resolve the argument of a deallocate expression. The expression must be
7161 a pointer or a full array. */
7164 resolve_deallocate_expr (gfc_expr
*e
)
7166 symbol_attribute attr
;
7167 int allocatable
, pointer
;
7173 if (!gfc_resolve_expr (e
))
7176 if (e
->expr_type
!= EXPR_VARIABLE
)
7179 sym
= e
->symtree
->n
.sym
;
7180 unlimited
= UNLIMITED_POLY(sym
);
7182 if (sym
->ts
.type
== BT_CLASS
)
7184 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7185 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7189 allocatable
= sym
->attr
.allocatable
;
7190 pointer
= sym
->attr
.pointer
;
7192 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7197 if (ref
->u
.ar
.type
!= AR_FULL
7198 && !(ref
->u
.ar
.type
== AR_ELEMENT
&& ref
->u
.ar
.as
->rank
== 0
7199 && ref
->u
.ar
.codimen
&& gfc_ref_this_image (ref
)))
7204 c
= ref
->u
.c
.component
;
7205 if (c
->ts
.type
== BT_CLASS
)
7207 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7208 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7212 allocatable
= c
->attr
.allocatable
;
7213 pointer
= c
->attr
.pointer
;
7223 attr
= gfc_expr_attr (e
);
7225 if (allocatable
== 0 && attr
.pointer
== 0 && !unlimited
)
7228 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7234 if (gfc_is_coindexed (e
))
7236 gfc_error ("Coindexed allocatable object at %L", &e
->where
);
7241 && !gfc_check_vardef_context (e
, true, true, false,
7242 _("DEALLOCATE object")))
7244 if (!gfc_check_vardef_context (e
, false, true, false,
7245 _("DEALLOCATE object")))
7252 /* Returns true if the expression e contains a reference to the symbol sym. */
7254 sym_in_expr (gfc_expr
*e
, gfc_symbol
*sym
, int *f ATTRIBUTE_UNUSED
)
7256 if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
== sym
)
7263 gfc_find_sym_in_expr (gfc_symbol
*sym
, gfc_expr
*e
)
7265 return gfc_traverse_expr (e
, sym
, sym_in_expr
, 0);
7269 /* Given the expression node e for an allocatable/pointer of derived type to be
7270 allocated, get the expression node to be initialized afterwards (needed for
7271 derived types with default initializers, and derived types with allocatable
7272 components that need nullification.) */
7275 gfc_expr_to_initialize (gfc_expr
*e
)
7281 result
= gfc_copy_expr (e
);
7283 /* Change the last array reference from AR_ELEMENT to AR_FULL. */
7284 for (ref
= result
->ref
; ref
; ref
= ref
->next
)
7285 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
7287 ref
->u
.ar
.type
= AR_FULL
;
7289 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
7290 ref
->u
.ar
.start
[i
] = ref
->u
.ar
.end
[i
] = ref
->u
.ar
.stride
[i
] = NULL
;
7295 gfc_free_shape (&result
->shape
, result
->rank
);
7297 /* Recalculate rank, shape, etc. */
7298 gfc_resolve_expr (result
);
7303 /* If the last ref of an expression is an array ref, return a copy of the
7304 expression with that one removed. Otherwise, a copy of the original
7305 expression. This is used for allocate-expressions and pointer assignment
7306 LHS, where there may be an array specification that needs to be stripped
7307 off when using gfc_check_vardef_context. */
7310 remove_last_array_ref (gfc_expr
* e
)
7315 e2
= gfc_copy_expr (e
);
7316 for (r
= &e2
->ref
; *r
; r
= &(*r
)->next
)
7317 if ((*r
)->type
== REF_ARRAY
&& !(*r
)->next
)
7319 gfc_free_ref_list (*r
);
7328 /* Used in resolve_allocate_expr to check that a allocation-object and
7329 a source-expr are conformable. This does not catch all possible
7330 cases; in particular a runtime checking is needed. */
7333 conformable_arrays (gfc_expr
*e1
, gfc_expr
*e2
)
7336 for (tail
= e2
->ref
; tail
&& tail
->next
; tail
= tail
->next
);
7338 /* First compare rank. */
7339 if ((tail
&& e1
->rank
!= tail
->u
.ar
.as
->rank
)
7340 || (!tail
&& e1
->rank
!= e2
->rank
))
7342 gfc_error ("Source-expr at %L must be scalar or have the "
7343 "same rank as the allocate-object at %L",
7344 &e1
->where
, &e2
->where
);
7355 for (i
= 0; i
< e1
->rank
; i
++)
7357 if (tail
->u
.ar
.start
[i
] == NULL
)
7360 if (tail
->u
.ar
.end
[i
])
7362 mpz_set (s
, tail
->u
.ar
.end
[i
]->value
.integer
);
7363 mpz_sub (s
, s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7364 mpz_add_ui (s
, s
, 1);
7368 mpz_set (s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7371 if (mpz_cmp (e1
->shape
[i
], s
) != 0)
7373 gfc_error ("Source-expr at %L and allocate-object at %L must "
7374 "have the same shape", &e1
->where
, &e2
->where
);
7387 /* Resolve the expression in an ALLOCATE statement, doing the additional
7388 checks to see whether the expression is OK or not. The expression must
7389 have a trailing array reference that gives the size of the array. */
7392 resolve_allocate_expr (gfc_expr
*e
, gfc_code
*code
, bool *array_alloc_wo_spec
)
7394 int i
, pointer
, allocatable
, dimension
, is_abstract
;
7398 symbol_attribute attr
;
7399 gfc_ref
*ref
, *ref2
;
7402 gfc_symbol
*sym
= NULL
;
7407 /* Mark the utmost array component as being in allocate to allow DIMEN_STAR
7408 checking of coarrays. */
7409 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7410 if (ref
->next
== NULL
)
7413 if (ref
&& ref
->type
== REF_ARRAY
)
7414 ref
->u
.ar
.in_allocate
= true;
7416 if (!gfc_resolve_expr (e
))
7419 /* Make sure the expression is allocatable or a pointer. If it is
7420 pointer, the next-to-last reference must be a pointer. */
7424 sym
= e
->symtree
->n
.sym
;
7426 /* Check whether ultimate component is abstract and CLASS. */
7429 /* Is the allocate-object unlimited polymorphic? */
7430 unlimited
= UNLIMITED_POLY(e
);
7432 if (e
->expr_type
!= EXPR_VARIABLE
)
7435 attr
= gfc_expr_attr (e
);
7436 pointer
= attr
.pointer
;
7437 dimension
= attr
.dimension
;
7438 codimension
= attr
.codimension
;
7442 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
))
7444 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7445 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7446 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
7447 codimension
= CLASS_DATA (sym
)->attr
.codimension
;
7448 is_abstract
= CLASS_DATA (sym
)->attr
.abstract
;
7452 allocatable
= sym
->attr
.allocatable
;
7453 pointer
= sym
->attr
.pointer
;
7454 dimension
= sym
->attr
.dimension
;
7455 codimension
= sym
->attr
.codimension
;
7460 for (ref
= e
->ref
; ref
; ref2
= ref
, ref
= ref
->next
)
7465 if (ref
->u
.ar
.codimen
> 0)
7468 for (n
= ref
->u
.ar
.dimen
;
7469 n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
7470 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_THIS_IMAGE
)
7477 if (ref
->next
!= NULL
)
7485 gfc_error ("Coindexed allocatable object at %L",
7490 c
= ref
->u
.c
.component
;
7491 if (c
->ts
.type
== BT_CLASS
)
7493 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7494 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7495 dimension
= CLASS_DATA (c
)->attr
.dimension
;
7496 codimension
= CLASS_DATA (c
)->attr
.codimension
;
7497 is_abstract
= CLASS_DATA (c
)->attr
.abstract
;
7501 allocatable
= c
->attr
.allocatable
;
7502 pointer
= c
->attr
.pointer
;
7503 dimension
= c
->attr
.dimension
;
7504 codimension
= c
->attr
.codimension
;
7505 is_abstract
= c
->attr
.abstract
;
7517 /* Check for F08:C628. */
7518 if (allocatable
== 0 && pointer
== 0 && !unlimited
)
7520 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7525 /* Some checks for the SOURCE tag. */
7528 /* Check F03:C631. */
7529 if (!gfc_type_compatible (&e
->ts
, &code
->expr3
->ts
))
7531 gfc_error ("Type of entity at %L is type incompatible with "
7532 "source-expr at %L", &e
->where
, &code
->expr3
->where
);
7536 /* Check F03:C632 and restriction following Note 6.18. */
7537 if (code
->expr3
->rank
> 0 && !conformable_arrays (code
->expr3
, e
))
7540 /* Check F03:C633. */
7541 if (code
->expr3
->ts
.kind
!= e
->ts
.kind
&& !unlimited
)
7543 gfc_error ("The allocate-object at %L and the source-expr at %L "
7544 "shall have the same kind type parameter",
7545 &e
->where
, &code
->expr3
->where
);
7549 /* Check F2008, C642. */
7550 if (code
->expr3
->ts
.type
== BT_DERIVED
7551 && ((codimension
&& gfc_expr_attr (code
->expr3
).lock_comp
)
7552 || (code
->expr3
->ts
.u
.derived
->from_intmod
7553 == INTMOD_ISO_FORTRAN_ENV
7554 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7555 == ISOFORTRAN_LOCK_TYPE
)))
7557 gfc_error ("The source-expr at %L shall neither be of type "
7558 "LOCK_TYPE nor have a LOCK_TYPE component if "
7559 "allocate-object at %L is a coarray",
7560 &code
->expr3
->where
, &e
->where
);
7564 /* Check TS18508, C702/C703. */
7565 if (code
->expr3
->ts
.type
== BT_DERIVED
7566 && ((codimension
&& gfc_expr_attr (code
->expr3
).event_comp
)
7567 || (code
->expr3
->ts
.u
.derived
->from_intmod
7568 == INTMOD_ISO_FORTRAN_ENV
7569 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7570 == ISOFORTRAN_EVENT_TYPE
)))
7572 gfc_error ("The source-expr at %L shall neither be of type "
7573 "EVENT_TYPE nor have a EVENT_TYPE component if "
7574 "allocate-object at %L is a coarray",
7575 &code
->expr3
->where
, &e
->where
);
7580 /* Check F08:C629. */
7581 if (is_abstract
&& code
->ext
.alloc
.ts
.type
== BT_UNKNOWN
7584 gcc_assert (e
->ts
.type
== BT_CLASS
);
7585 gfc_error ("Allocating %s of ABSTRACT base type at %L requires a "
7586 "type-spec or source-expr", sym
->name
, &e
->where
);
7590 /* Check F08:C632. */
7591 if (code
->ext
.alloc
.ts
.type
== BT_CHARACTER
&& !e
->ts
.deferred
7592 && !UNLIMITED_POLY (e
))
7596 if (!e
->ts
.u
.cl
->length
)
7599 cmp
= gfc_dep_compare_expr (e
->ts
.u
.cl
->length
,
7600 code
->ext
.alloc
.ts
.u
.cl
->length
);
7601 if (cmp
== 1 || cmp
== -1 || cmp
== -3)
7603 gfc_error ("Allocating %s at %L with type-spec requires the same "
7604 "character-length parameter as in the declaration",
7605 sym
->name
, &e
->where
);
7610 /* In the variable definition context checks, gfc_expr_attr is used
7611 on the expression. This is fooled by the array specification
7612 present in e, thus we have to eliminate that one temporarily. */
7613 e2
= remove_last_array_ref (e
);
7616 t
= gfc_check_vardef_context (e2
, true, true, false,
7617 _("ALLOCATE object"));
7619 t
= gfc_check_vardef_context (e2
, false, true, false,
7620 _("ALLOCATE object"));
7625 if (e
->ts
.type
== BT_CLASS
&& CLASS_DATA (e
)->attr
.dimension
7626 && !code
->expr3
&& code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7628 /* For class arrays, the initialization with SOURCE is done
7629 using _copy and trans_call. It is convenient to exploit that
7630 when the allocated type is different from the declared type but
7631 no SOURCE exists by setting expr3. */
7632 code
->expr3
= gfc_default_initializer (&code
->ext
.alloc
.ts
);
7634 else if (flag_coarray
!= GFC_FCOARRAY_LIB
&& e
->ts
.type
== BT_DERIVED
7635 && e
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
7636 && e
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
7638 /* We have to zero initialize the integer variable. */
7639 code
->expr3
= gfc_get_int_expr (gfc_default_integer_kind
, &e
->where
, 0);
7642 if (e
->ts
.type
== BT_CLASS
&& !unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7644 /* Make sure the vtab symbol is present when
7645 the module variables are generated. */
7646 gfc_typespec ts
= e
->ts
;
7648 ts
= code
->expr3
->ts
;
7649 else if (code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7650 ts
= code
->ext
.alloc
.ts
;
7652 /* Finding the vtab also publishes the type's symbol. Therefore this
7653 statement is necessary. */
7654 gfc_find_derived_vtab (ts
.u
.derived
);
7656 else if (unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7658 /* Again, make sure the vtab symbol is present when
7659 the module variables are generated. */
7660 gfc_typespec
*ts
= NULL
;
7662 ts
= &code
->expr3
->ts
;
7664 ts
= &code
->ext
.alloc
.ts
;
7668 /* Finding the vtab also publishes the type's symbol. Therefore this
7669 statement is necessary. */
7673 if (dimension
== 0 && codimension
== 0)
7676 /* Make sure the last reference node is an array specification. */
7678 if (!ref2
|| ref2
->type
!= REF_ARRAY
|| ref2
->u
.ar
.type
== AR_FULL
7679 || (dimension
&& ref2
->u
.ar
.dimen
== 0))
7684 if (!gfc_notify_std (GFC_STD_F2008
, "Array specification required "
7685 "in ALLOCATE statement at %L", &e
->where
))
7687 if (code
->expr3
->rank
!= 0)
7688 *array_alloc_wo_spec
= true;
7691 gfc_error ("Array specification or array-valued SOURCE= "
7692 "expression required in ALLOCATE statement at %L",
7699 gfc_error ("Array specification required in ALLOCATE statement "
7700 "at %L", &e
->where
);
7705 /* Make sure that the array section reference makes sense in the
7706 context of an ALLOCATE specification. */
7711 for (i
= ar
->dimen
; i
< ar
->dimen
+ ar
->codimen
; i
++)
7712 if (ar
->dimen_type
[i
] == DIMEN_THIS_IMAGE
)
7714 gfc_error ("Coarray specification required in ALLOCATE statement "
7715 "at %L", &e
->where
);
7719 for (i
= 0; i
< ar
->dimen
; i
++)
7721 if (ar
->type
== AR_ELEMENT
|| ar
->type
== AR_FULL
)
7724 switch (ar
->dimen_type
[i
])
7730 if (ar
->start
[i
] != NULL
7731 && ar
->end
[i
] != NULL
7732 && ar
->stride
[i
] == NULL
)
7740 case DIMEN_THIS_IMAGE
:
7741 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7747 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7749 sym
= a
->expr
->symtree
->n
.sym
;
7751 /* TODO - check derived type components. */
7752 if (gfc_bt_struct (sym
->ts
.type
) || sym
->ts
.type
== BT_CLASS
)
7755 if ((ar
->start
[i
] != NULL
7756 && gfc_find_sym_in_expr (sym
, ar
->start
[i
]))
7757 || (ar
->end
[i
] != NULL
7758 && gfc_find_sym_in_expr (sym
, ar
->end
[i
])))
7760 gfc_error ("%qs must not appear in the array specification at "
7761 "%L in the same ALLOCATE statement where it is "
7762 "itself allocated", sym
->name
, &ar
->where
);
7768 for (i
= ar
->dimen
; i
< ar
->codimen
+ ar
->dimen
; i
++)
7770 if (ar
->dimen_type
[i
] == DIMEN_ELEMENT
7771 || ar
->dimen_type
[i
] == DIMEN_RANGE
)
7773 if (i
== (ar
->dimen
+ ar
->codimen
- 1))
7775 gfc_error ("Expected '*' in coindex specification in ALLOCATE "
7776 "statement at %L", &e
->where
);
7782 if (ar
->dimen_type
[i
] == DIMEN_STAR
&& i
== (ar
->dimen
+ ar
->codimen
- 1)
7783 && ar
->stride
[i
] == NULL
)
7786 gfc_error ("Bad coarray specification in ALLOCATE statement at %L",
7800 resolve_allocate_deallocate (gfc_code
*code
, const char *fcn
)
7802 gfc_expr
*stat
, *errmsg
, *pe
, *qe
;
7803 gfc_alloc
*a
, *p
, *q
;
7806 errmsg
= code
->expr2
;
7808 /* Check the stat variable. */
7811 gfc_check_vardef_context (stat
, false, false, false,
7812 _("STAT variable"));
7814 if ((stat
->ts
.type
!= BT_INTEGER
7815 && !(stat
->ref
&& (stat
->ref
->type
== REF_ARRAY
7816 || stat
->ref
->type
== REF_COMPONENT
)))
7818 gfc_error ("Stat-variable at %L must be a scalar INTEGER "
7819 "variable", &stat
->where
);
7821 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7822 if (p
->expr
->symtree
->n
.sym
->name
== stat
->symtree
->n
.sym
->name
)
7824 gfc_ref
*ref1
, *ref2
;
7827 for (ref1
= p
->expr
->ref
, ref2
= stat
->ref
; ref1
&& ref2
;
7828 ref1
= ref1
->next
, ref2
= ref2
->next
)
7830 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7832 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7841 gfc_error ("Stat-variable at %L shall not be %sd within "
7842 "the same %s statement", &stat
->where
, fcn
, fcn
);
7848 /* Check the errmsg variable. */
7852 gfc_warning (0, "ERRMSG at %L is useless without a STAT tag",
7855 gfc_check_vardef_context (errmsg
, false, false, false,
7856 _("ERRMSG variable"));
7858 /* F18:R928 alloc-opt is ERRMSG = errmsg-variable
7859 F18:R930 errmsg-variable is scalar-default-char-variable
7860 F18:R906 default-char-variable is variable
7861 F18:C906 default-char-variable shall be default character. */
7862 if ((errmsg
->ts
.type
!= BT_CHARACTER
7864 && (errmsg
->ref
->type
== REF_ARRAY
7865 || errmsg
->ref
->type
== REF_COMPONENT
)))
7867 || errmsg
->ts
.kind
!= gfc_default_character_kind
)
7868 gfc_error ("ERRMSG variable at %L shall be a scalar default CHARACTER "
7869 "variable", &errmsg
->where
);
7871 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7872 if (p
->expr
->symtree
->n
.sym
->name
== errmsg
->symtree
->n
.sym
->name
)
7874 gfc_ref
*ref1
, *ref2
;
7877 for (ref1
= p
->expr
->ref
, ref2
= errmsg
->ref
; ref1
&& ref2
;
7878 ref1
= ref1
->next
, ref2
= ref2
->next
)
7880 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7882 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7891 gfc_error ("Errmsg-variable at %L shall not be %sd within "
7892 "the same %s statement", &errmsg
->where
, fcn
, fcn
);
7898 /* Check that an allocate-object appears only once in the statement. */
7900 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7903 for (q
= p
->next
; q
; q
= q
->next
)
7906 if (pe
->symtree
->n
.sym
->name
== qe
->symtree
->n
.sym
->name
)
7908 /* This is a potential collision. */
7909 gfc_ref
*pr
= pe
->ref
;
7910 gfc_ref
*qr
= qe
->ref
;
7912 /* Follow the references until
7913 a) They start to differ, in which case there is no error;
7914 you can deallocate a%b and a%c in a single statement
7915 b) Both of them stop, which is an error
7916 c) One of them stops, which is also an error. */
7919 if (pr
== NULL
&& qr
== NULL
)
7921 gfc_error ("Allocate-object at %L also appears at %L",
7922 &pe
->where
, &qe
->where
);
7925 else if (pr
!= NULL
&& qr
== NULL
)
7927 gfc_error ("Allocate-object at %L is subobject of"
7928 " object at %L", &pe
->where
, &qe
->where
);
7931 else if (pr
== NULL
&& qr
!= NULL
)
7933 gfc_error ("Allocate-object at %L is subobject of"
7934 " object at %L", &qe
->where
, &pe
->where
);
7937 /* Here, pr != NULL && qr != NULL */
7938 gcc_assert(pr
->type
== qr
->type
);
7939 if (pr
->type
== REF_ARRAY
)
7941 /* Handle cases like allocate(v(3)%x(3), v(2)%x(3)),
7943 gcc_assert (qr
->type
== REF_ARRAY
);
7945 if (pr
->next
&& qr
->next
)
7948 gfc_array_ref
*par
= &(pr
->u
.ar
);
7949 gfc_array_ref
*qar
= &(qr
->u
.ar
);
7951 for (i
=0; i
<par
->dimen
; i
++)
7953 if ((par
->start
[i
] != NULL
7954 || qar
->start
[i
] != NULL
)
7955 && gfc_dep_compare_expr (par
->start
[i
],
7956 qar
->start
[i
]) != 0)
7963 if (pr
->u
.c
.component
->name
!= qr
->u
.c
.component
->name
)
7976 if (strcmp (fcn
, "ALLOCATE") == 0)
7978 bool arr_alloc_wo_spec
= false;
7980 /* Resolving the expr3 in the loop over all objects to allocate would
7981 execute loop invariant code for each loop item. Therefore do it just
7983 if (code
->expr3
&& code
->expr3
->mold
7984 && code
->expr3
->ts
.type
== BT_DERIVED
)
7986 /* Default initialization via MOLD (non-polymorphic). */
7987 gfc_expr
*rhs
= gfc_default_initializer (&code
->expr3
->ts
);
7990 gfc_resolve_expr (rhs
);
7991 gfc_free_expr (code
->expr3
);
7995 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7996 resolve_allocate_expr (a
->expr
, code
, &arr_alloc_wo_spec
);
7998 if (arr_alloc_wo_spec
&& code
->expr3
)
8000 /* Mark the allocate to have to take the array specification
8002 code
->ext
.alloc
.arr_spec_from_expr3
= 1;
8007 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8008 resolve_deallocate_expr (a
->expr
);
8013 /************ SELECT CASE resolution subroutines ************/
8015 /* Callback function for our mergesort variant. Determines interval
8016 overlaps for CASEs. Return <0 if op1 < op2, 0 for overlap, >0 for
8017 op1 > op2. Assumes we're not dealing with the default case.
8018 We have op1 = (:L), (K:L) or (K:) and op2 = (:N), (M:N) or (M:).
8019 There are nine situations to check. */
8022 compare_cases (const gfc_case
*op1
, const gfc_case
*op2
)
8026 if (op1
->low
== NULL
) /* op1 = (:L) */
8028 /* op2 = (:N), so overlap. */
8030 /* op2 = (M:) or (M:N), L < M */
8031 if (op2
->low
!= NULL
8032 && gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8035 else if (op1
->high
== NULL
) /* op1 = (K:) */
8037 /* op2 = (M:), so overlap. */
8039 /* op2 = (:N) or (M:N), K > N */
8040 if (op2
->high
!= NULL
8041 && gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8044 else /* op1 = (K:L) */
8046 if (op2
->low
== NULL
) /* op2 = (:N), K > N */
8047 retval
= (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8049 else if (op2
->high
== NULL
) /* op2 = (M:), L < M */
8050 retval
= (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8052 else /* op2 = (M:N) */
8056 if (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8059 else if (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8068 /* Merge-sort a double linked case list, detecting overlap in the
8069 process. LIST is the head of the double linked case list before it
8070 is sorted. Returns the head of the sorted list if we don't see any
8071 overlap, or NULL otherwise. */
8074 check_case_overlap (gfc_case
*list
)
8076 gfc_case
*p
, *q
, *e
, *tail
;
8077 int insize
, nmerges
, psize
, qsize
, cmp
, overlap_seen
;
8079 /* If the passed list was empty, return immediately. */
8086 /* Loop unconditionally. The only exit from this loop is a return
8087 statement, when we've finished sorting the case list. */
8094 /* Count the number of merges we do in this pass. */
8097 /* Loop while there exists a merge to be done. */
8102 /* Count this merge. */
8105 /* Cut the list in two pieces by stepping INSIZE places
8106 forward in the list, starting from P. */
8109 for (i
= 0; i
< insize
; i
++)
8118 /* Now we have two lists. Merge them! */
8119 while (psize
> 0 || (qsize
> 0 && q
!= NULL
))
8121 /* See from which the next case to merge comes from. */
8124 /* P is empty so the next case must come from Q. */
8129 else if (qsize
== 0 || q
== NULL
)
8138 cmp
= compare_cases (p
, q
);
8141 /* The whole case range for P is less than the
8149 /* The whole case range for Q is greater than
8150 the case range for P. */
8157 /* The cases overlap, or they are the same
8158 element in the list. Either way, we must
8159 issue an error and get the next case from P. */
8160 /* FIXME: Sort P and Q by line number. */
8161 gfc_error ("CASE label at %L overlaps with CASE "
8162 "label at %L", &p
->where
, &q
->where
);
8170 /* Add the next element to the merged list. */
8179 /* P has now stepped INSIZE places along, and so has Q. So
8180 they're the same. */
8185 /* If we have done only one merge or none at all, we've
8186 finished sorting the cases. */
8195 /* Otherwise repeat, merging lists twice the size. */
8201 /* Check to see if an expression is suitable for use in a CASE statement.
8202 Makes sure that all case expressions are scalar constants of the same
8203 type. Return false if anything is wrong. */
8206 validate_case_label_expr (gfc_expr
*e
, gfc_expr
*case_expr
)
8208 if (e
== NULL
) return true;
8210 if (e
->ts
.type
!= case_expr
->ts
.type
)
8212 gfc_error ("Expression in CASE statement at %L must be of type %s",
8213 &e
->where
, gfc_basic_typename (case_expr
->ts
.type
));
8217 /* C805 (R808) For a given case-construct, each case-value shall be of
8218 the same type as case-expr. For character type, length differences
8219 are allowed, but the kind type parameters shall be the same. */
8221 if (case_expr
->ts
.type
== BT_CHARACTER
&& e
->ts
.kind
!= case_expr
->ts
.kind
)
8223 gfc_error ("Expression in CASE statement at %L must be of kind %d",
8224 &e
->where
, case_expr
->ts
.kind
);
8228 /* Convert the case value kind to that of case expression kind,
8231 if (e
->ts
.kind
!= case_expr
->ts
.kind
)
8232 gfc_convert_type_warn (e
, &case_expr
->ts
, 2, 0);
8236 gfc_error ("Expression in CASE statement at %L must be scalar",
8245 /* Given a completely parsed select statement, we:
8247 - Validate all expressions and code within the SELECT.
8248 - Make sure that the selection expression is not of the wrong type.
8249 - Make sure that no case ranges overlap.
8250 - Eliminate unreachable cases and unreachable code resulting from
8251 removing case labels.
8253 The standard does allow unreachable cases, e.g. CASE (5:3). But
8254 they are a hassle for code generation, and to prevent that, we just
8255 cut them out here. This is not necessary for overlapping cases
8256 because they are illegal and we never even try to generate code.
8258 We have the additional caveat that a SELECT construct could have
8259 been a computed GOTO in the source code. Fortunately we can fairly
8260 easily work around that here: The case_expr for a "real" SELECT CASE
8261 is in code->expr1, but for a computed GOTO it is in code->expr2. All
8262 we have to do is make sure that the case_expr is a scalar integer
8266 resolve_select (gfc_code
*code
, bool select_type
)
8269 gfc_expr
*case_expr
;
8270 gfc_case
*cp
, *default_case
, *tail
, *head
;
8271 int seen_unreachable
;
8277 if (code
->expr1
== NULL
)
8279 /* This was actually a computed GOTO statement. */
8280 case_expr
= code
->expr2
;
8281 if (case_expr
->ts
.type
!= BT_INTEGER
|| case_expr
->rank
!= 0)
8282 gfc_error ("Selection expression in computed GOTO statement "
8283 "at %L must be a scalar integer expression",
8286 /* Further checking is not necessary because this SELECT was built
8287 by the compiler, so it should always be OK. Just move the
8288 case_expr from expr2 to expr so that we can handle computed
8289 GOTOs as normal SELECTs from here on. */
8290 code
->expr1
= code
->expr2
;
8295 case_expr
= code
->expr1
;
8296 type
= case_expr
->ts
.type
;
8299 if (type
!= BT_LOGICAL
&& type
!= BT_INTEGER
&& type
!= BT_CHARACTER
)
8301 gfc_error ("Argument of SELECT statement at %L cannot be %s",
8302 &case_expr
->where
, gfc_typename (&case_expr
->ts
));
8304 /* Punt. Going on here just produce more garbage error messages. */
8309 if (!select_type
&& case_expr
->rank
!= 0)
8311 gfc_error ("Argument of SELECT statement at %L must be a scalar "
8312 "expression", &case_expr
->where
);
8318 /* Raise a warning if an INTEGER case value exceeds the range of
8319 the case-expr. Later, all expressions will be promoted to the
8320 largest kind of all case-labels. */
8322 if (type
== BT_INTEGER
)
8323 for (body
= code
->block
; body
; body
= body
->block
)
8324 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8327 && gfc_check_integer_range (cp
->low
->value
.integer
,
8328 case_expr
->ts
.kind
) != ARITH_OK
)
8329 gfc_warning (0, "Expression in CASE statement at %L is "
8330 "not in the range of %s", &cp
->low
->where
,
8331 gfc_typename (&case_expr
->ts
));
8334 && cp
->low
!= cp
->high
8335 && gfc_check_integer_range (cp
->high
->value
.integer
,
8336 case_expr
->ts
.kind
) != ARITH_OK
)
8337 gfc_warning (0, "Expression in CASE statement at %L is "
8338 "not in the range of %s", &cp
->high
->where
,
8339 gfc_typename (&case_expr
->ts
));
8342 /* PR 19168 has a long discussion concerning a mismatch of the kinds
8343 of the SELECT CASE expression and its CASE values. Walk the lists
8344 of case values, and if we find a mismatch, promote case_expr to
8345 the appropriate kind. */
8347 if (type
== BT_LOGICAL
|| type
== BT_INTEGER
)
8349 for (body
= code
->block
; body
; body
= body
->block
)
8351 /* Walk the case label list. */
8352 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8354 /* Intercept the DEFAULT case. It does not have a kind. */
8355 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8358 /* Unreachable case ranges are discarded, so ignore. */
8359 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8360 && cp
->low
!= cp
->high
8361 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8365 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->low
))
8366 gfc_convert_type_warn (case_expr
, &cp
->low
->ts
, 2, 0);
8368 if (cp
->high
!= NULL
8369 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->high
))
8370 gfc_convert_type_warn (case_expr
, &cp
->high
->ts
, 2, 0);
8375 /* Assume there is no DEFAULT case. */
8376 default_case
= NULL
;
8381 for (body
= code
->block
; body
; body
= body
->block
)
8383 /* Assume the CASE list is OK, and all CASE labels can be matched. */
8385 seen_unreachable
= 0;
8387 /* Walk the case label list, making sure that all case labels
8389 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8391 /* Count the number of cases in the whole construct. */
8394 /* Intercept the DEFAULT case. */
8395 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8397 if (default_case
!= NULL
)
8399 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8400 "by a second DEFAULT CASE at %L",
8401 &default_case
->where
, &cp
->where
);
8412 /* Deal with single value cases and case ranges. Errors are
8413 issued from the validation function. */
8414 if (!validate_case_label_expr (cp
->low
, case_expr
)
8415 || !validate_case_label_expr (cp
->high
, case_expr
))
8421 if (type
== BT_LOGICAL
8422 && ((cp
->low
== NULL
|| cp
->high
== NULL
)
8423 || cp
->low
!= cp
->high
))
8425 gfc_error ("Logical range in CASE statement at %L is not "
8426 "allowed", &cp
->low
->where
);
8431 if (type
== BT_LOGICAL
&& cp
->low
->expr_type
== EXPR_CONSTANT
)
8434 value
= cp
->low
->value
.logical
== 0 ? 2 : 1;
8435 if (value
& seen_logical
)
8437 gfc_error ("Constant logical value in CASE statement "
8438 "is repeated at %L",
8443 seen_logical
|= value
;
8446 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8447 && cp
->low
!= cp
->high
8448 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8450 if (warn_surprising
)
8451 gfc_warning (OPT_Wsurprising
,
8452 "Range specification at %L can never be matched",
8455 cp
->unreachable
= 1;
8456 seen_unreachable
= 1;
8460 /* If the case range can be matched, it can also overlap with
8461 other cases. To make sure it does not, we put it in a
8462 double linked list here. We sort that with a merge sort
8463 later on to detect any overlapping cases. */
8467 head
->right
= head
->left
= NULL
;
8472 tail
->right
->left
= tail
;
8479 /* It there was a failure in the previous case label, give up
8480 for this case label list. Continue with the next block. */
8484 /* See if any case labels that are unreachable have been seen.
8485 If so, we eliminate them. This is a bit of a kludge because
8486 the case lists for a single case statement (label) is a
8487 single forward linked lists. */
8488 if (seen_unreachable
)
8490 /* Advance until the first case in the list is reachable. */
8491 while (body
->ext
.block
.case_list
!= NULL
8492 && body
->ext
.block
.case_list
->unreachable
)
8494 gfc_case
*n
= body
->ext
.block
.case_list
;
8495 body
->ext
.block
.case_list
= body
->ext
.block
.case_list
->next
;
8497 gfc_free_case_list (n
);
8500 /* Strip all other unreachable cases. */
8501 if (body
->ext
.block
.case_list
)
8503 for (cp
= body
->ext
.block
.case_list
; cp
&& cp
->next
; cp
= cp
->next
)
8505 if (cp
->next
->unreachable
)
8507 gfc_case
*n
= cp
->next
;
8508 cp
->next
= cp
->next
->next
;
8510 gfc_free_case_list (n
);
8517 /* See if there were overlapping cases. If the check returns NULL,
8518 there was overlap. In that case we don't do anything. If head
8519 is non-NULL, we prepend the DEFAULT case. The sorted list can
8520 then used during code generation for SELECT CASE constructs with
8521 a case expression of a CHARACTER type. */
8524 head
= check_case_overlap (head
);
8526 /* Prepend the default_case if it is there. */
8527 if (head
!= NULL
&& default_case
)
8529 default_case
->left
= NULL
;
8530 default_case
->right
= head
;
8531 head
->left
= default_case
;
8535 /* Eliminate dead blocks that may be the result if we've seen
8536 unreachable case labels for a block. */
8537 for (body
= code
; body
&& body
->block
; body
= body
->block
)
8539 if (body
->block
->ext
.block
.case_list
== NULL
)
8541 /* Cut the unreachable block from the code chain. */
8542 gfc_code
*c
= body
->block
;
8543 body
->block
= c
->block
;
8545 /* Kill the dead block, but not the blocks below it. */
8547 gfc_free_statements (c
);
8551 /* More than two cases is legal but insane for logical selects.
8552 Issue a warning for it. */
8553 if (warn_surprising
&& type
== BT_LOGICAL
&& ncases
> 2)
8554 gfc_warning (OPT_Wsurprising
,
8555 "Logical SELECT CASE block at %L has more that two cases",
8560 /* Check if a derived type is extensible. */
8563 gfc_type_is_extensible (gfc_symbol
*sym
)
8565 return !(sym
->attr
.is_bind_c
|| sym
->attr
.sequence
8566 || (sym
->attr
.is_class
8567 && sym
->components
->ts
.u
.derived
->attr
.unlimited_polymorphic
));
8572 resolve_types (gfc_namespace
*ns
);
8574 /* Resolve an associate-name: Resolve target and ensure the type-spec is
8575 correct as well as possibly the array-spec. */
8578 resolve_assoc_var (gfc_symbol
* sym
, bool resolve_target
)
8582 gcc_assert (sym
->assoc
);
8583 gcc_assert (sym
->attr
.flavor
== FL_VARIABLE
);
8585 /* If this is for SELECT TYPE, the target may not yet be set. In that
8586 case, return. Resolution will be called later manually again when
8588 target
= sym
->assoc
->target
;
8591 gcc_assert (!sym
->assoc
->dangling
);
8593 if (resolve_target
&& !gfc_resolve_expr (target
))
8596 /* For variable targets, we get some attributes from the target. */
8597 if (target
->expr_type
== EXPR_VARIABLE
)
8601 gcc_assert (target
->symtree
);
8602 tsym
= target
->symtree
->n
.sym
;
8604 sym
->attr
.asynchronous
= tsym
->attr
.asynchronous
;
8605 sym
->attr
.volatile_
= tsym
->attr
.volatile_
;
8607 sym
->attr
.target
= tsym
->attr
.target
8608 || gfc_expr_attr (target
).pointer
;
8609 if (is_subref_array (target
))
8610 sym
->attr
.subref_array_pointer
= 1;
8613 if (target
->expr_type
== EXPR_NULL
)
8615 gfc_error ("Selector at %L cannot be NULL()", &target
->where
);
8618 else if (target
->ts
.type
== BT_UNKNOWN
)
8620 gfc_error ("Selector at %L has no type", &target
->where
);
8624 /* Get type if this was not already set. Note that it can be
8625 some other type than the target in case this is a SELECT TYPE
8626 selector! So we must not update when the type is already there. */
8627 if (sym
->ts
.type
== BT_UNKNOWN
)
8628 sym
->ts
= target
->ts
;
8630 gcc_assert (sym
->ts
.type
!= BT_UNKNOWN
);
8632 /* See if this is a valid association-to-variable. */
8633 sym
->assoc
->variable
= (target
->expr_type
== EXPR_VARIABLE
8634 && !gfc_has_vector_subscript (target
));
8636 /* Finally resolve if this is an array or not. */
8637 if (sym
->attr
.dimension
&& target
->rank
== 0)
8639 /* primary.c makes the assumption that a reference to an associate
8640 name followed by a left parenthesis is an array reference. */
8641 if (sym
->ts
.type
!= BT_CHARACTER
)
8642 gfc_error ("Associate-name %qs at %L is used as array",
8643 sym
->name
, &sym
->declared_at
);
8644 sym
->attr
.dimension
= 0;
8649 /* We cannot deal with class selectors that need temporaries. */
8650 if (target
->ts
.type
== BT_CLASS
8651 && gfc_ref_needs_temporary_p (target
->ref
))
8653 gfc_error ("CLASS selector at %L needs a temporary which is not "
8654 "yet implemented", &target
->where
);
8658 if (target
->ts
.type
== BT_CLASS
)
8659 gfc_fix_class_refs (target
);
8661 if (target
->rank
!= 0)
8664 /* The rank may be incorrectly guessed at parsing, therefore make sure
8665 it is corrected now. */
8666 if (sym
->ts
.type
!= BT_CLASS
&& (!sym
->as
|| sym
->assoc
->rankguessed
))
8669 sym
->as
= gfc_get_array_spec ();
8671 as
->rank
= target
->rank
;
8672 as
->type
= AS_DEFERRED
;
8673 as
->corank
= gfc_get_corank (target
);
8674 sym
->attr
.dimension
= 1;
8675 if (as
->corank
!= 0)
8676 sym
->attr
.codimension
= 1;
8681 /* target's rank is 0, but the type of the sym is still array valued,
8682 which has to be corrected. */
8683 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)
8686 symbol_attribute attr
;
8687 /* The associated variable's type is still the array type
8688 correct this now. */
8689 gfc_typespec
*ts
= &target
->ts
;
8692 for (ref
= target
->ref
; ref
!= NULL
; ref
= ref
->next
)
8697 ts
= &ref
->u
.c
.component
->ts
;
8700 if (ts
->type
== BT_CLASS
)
8701 ts
= &ts
->u
.derived
->components
->ts
;
8707 /* Create a scalar instance of the current class type. Because the
8708 rank of a class array goes into its name, the type has to be
8709 rebuild. The alternative of (re-)setting just the attributes
8710 and as in the current type, destroys the type also in other
8714 sym
->ts
.type
= BT_CLASS
;
8715 attr
= CLASS_DATA (sym
)->attr
;
8717 attr
.associate_var
= 1;
8718 attr
.dimension
= attr
.codimension
= 0;
8719 attr
.class_pointer
= 1;
8720 if (!gfc_build_class_symbol (&sym
->ts
, &attr
, &as
))
8722 /* Make sure the _vptr is set. */
8723 c
= gfc_find_component (sym
->ts
.u
.derived
, "_vptr", true, true, NULL
);
8724 if (c
->ts
.u
.derived
== NULL
)
8725 c
->ts
.u
.derived
= gfc_find_derived_vtab (sym
->ts
.u
.derived
);
8726 CLASS_DATA (sym
)->attr
.pointer
= 1;
8727 CLASS_DATA (sym
)->attr
.class_pointer
= 1;
8728 gfc_set_sym_referenced (sym
->ts
.u
.derived
);
8729 gfc_commit_symbol (sym
->ts
.u
.derived
);
8730 /* _vptr now has the _vtab in it, change it to the _vtype. */
8731 if (c
->ts
.u
.derived
->attr
.vtab
)
8732 c
->ts
.u
.derived
= c
->ts
.u
.derived
->ts
.u
.derived
;
8733 c
->ts
.u
.derived
->ns
->types_resolved
= 0;
8734 resolve_types (c
->ts
.u
.derived
->ns
);
8738 /* Mark this as an associate variable. */
8739 sym
->attr
.associate_var
= 1;
8741 /* Fix up the type-spec for CHARACTER types. */
8742 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.select_type_temporary
)
8745 sym
->ts
.u
.cl
= target
->ts
.u
.cl
;
8747 if (!sym
->ts
.u
.cl
->length
8748 && !sym
->ts
.deferred
8749 && target
->expr_type
== EXPR_CONSTANT
)
8751 sym
->ts
.u
.cl
->length
=
8752 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
8753 target
->value
.character
.length
);
8755 else if ((!sym
->ts
.u
.cl
->length
8756 || sym
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
)
8757 && target
->expr_type
!= EXPR_VARIABLE
)
8759 sym
->ts
.u
.cl
= gfc_get_charlen();
8760 sym
->ts
.deferred
= 1;
8762 /* This is reset in trans-stmt.c after the assignment
8763 of the target expression to the associate name. */
8764 sym
->attr
.allocatable
= 1;
8768 /* If the target is a good class object, so is the associate variable. */
8769 if (sym
->ts
.type
== BT_CLASS
&& gfc_expr_attr (target
).class_ok
)
8770 sym
->attr
.class_ok
= 1;
8774 /* Ensure that SELECT TYPE expressions have the correct rank and a full
8775 array reference, where necessary. The symbols are artificial and so
8776 the dimension attribute and arrayspec can also be set. In addition,
8777 sometimes the expr1 arrives as BT_DERIVED, when the symbol is BT_CLASS.
8778 This is corrected here as well.*/
8781 fixup_array_ref (gfc_expr
**expr1
, gfc_expr
*expr2
,
8782 int rank
, gfc_ref
*ref
)
8784 gfc_ref
*nref
= (*expr1
)->ref
;
8785 gfc_symbol
*sym1
= (*expr1
)->symtree
->n
.sym
;
8786 gfc_symbol
*sym2
= expr2
? expr2
->symtree
->n
.sym
: NULL
;
8787 (*expr1
)->rank
= rank
;
8788 if (sym1
->ts
.type
== BT_CLASS
)
8790 if ((*expr1
)->ts
.type
!= BT_CLASS
)
8791 (*expr1
)->ts
= sym1
->ts
;
8793 CLASS_DATA (sym1
)->attr
.dimension
= 1;
8794 if (CLASS_DATA (sym1
)->as
== NULL
&& sym2
)
8795 CLASS_DATA (sym1
)->as
8796 = gfc_copy_array_spec (CLASS_DATA (sym2
)->as
);
8800 sym1
->attr
.dimension
= 1;
8801 if (sym1
->as
== NULL
&& sym2
)
8802 sym1
->as
= gfc_copy_array_spec (sym2
->as
);
8805 for (; nref
; nref
= nref
->next
)
8806 if (nref
->next
== NULL
)
8809 if (ref
&& nref
&& nref
->type
!= REF_ARRAY
)
8810 nref
->next
= gfc_copy_ref (ref
);
8811 else if (ref
&& !nref
)
8812 (*expr1
)->ref
= gfc_copy_ref (ref
);
8817 build_loc_call (gfc_expr
*sym_expr
)
8820 loc_call
= gfc_get_expr ();
8821 loc_call
->expr_type
= EXPR_FUNCTION
;
8822 gfc_get_sym_tree ("_loc", gfc_current_ns
, &loc_call
->symtree
, false);
8823 loc_call
->symtree
->n
.sym
->attr
.flavor
= FL_PROCEDURE
;
8824 loc_call
->symtree
->n
.sym
->attr
.intrinsic
= 1;
8825 loc_call
->symtree
->n
.sym
->result
= loc_call
->symtree
->n
.sym
;
8826 gfc_commit_symbol (loc_call
->symtree
->n
.sym
);
8827 loc_call
->ts
.type
= BT_INTEGER
;
8828 loc_call
->ts
.kind
= gfc_index_integer_kind
;
8829 loc_call
->value
.function
.isym
= gfc_intrinsic_function_by_id (GFC_ISYM_LOC
);
8830 loc_call
->value
.function
.actual
= gfc_get_actual_arglist ();
8831 loc_call
->value
.function
.actual
->expr
= sym_expr
;
8832 loc_call
->where
= sym_expr
->where
;
8836 /* Resolve a SELECT TYPE statement. */
8839 resolve_select_type (gfc_code
*code
, gfc_namespace
*old_ns
)
8841 gfc_symbol
*selector_type
;
8842 gfc_code
*body
, *new_st
, *if_st
, *tail
;
8843 gfc_code
*class_is
= NULL
, *default_case
= NULL
;
8846 char name
[GFC_MAX_SYMBOL_LEN
];
8850 gfc_ref
* ref
= NULL
;
8851 gfc_expr
*selector_expr
= NULL
;
8853 ns
= code
->ext
.block
.ns
;
8856 /* Check for F03:C813. */
8857 if (code
->expr1
->ts
.type
!= BT_CLASS
8858 && !(code
->expr2
&& code
->expr2
->ts
.type
== BT_CLASS
))
8860 gfc_error ("Selector shall be polymorphic in SELECT TYPE statement "
8861 "at %L", &code
->loc
);
8865 if (!code
->expr1
->symtree
->n
.sym
->attr
.class_ok
)
8870 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
8871 code
->expr1
->symtree
->n
.sym
->ts
= code
->expr2
->ts
;
8872 selector_type
= CLASS_DATA (code
->expr2
)->ts
.u
.derived
;
8874 if (code
->expr2
->rank
&& CLASS_DATA (code
->expr1
)->as
)
8875 CLASS_DATA (code
->expr1
)->as
->rank
= code
->expr2
->rank
;
8877 /* F2008: C803 The selector expression must not be coindexed. */
8878 if (gfc_is_coindexed (code
->expr2
))
8880 gfc_error ("Selector at %L must not be coindexed",
8881 &code
->expr2
->where
);
8888 selector_type
= CLASS_DATA (code
->expr1
)->ts
.u
.derived
;
8890 if (gfc_is_coindexed (code
->expr1
))
8892 gfc_error ("Selector at %L must not be coindexed",
8893 &code
->expr1
->where
);
8898 /* Loop over TYPE IS / CLASS IS cases. */
8899 for (body
= code
->block
; body
; body
= body
->block
)
8901 c
= body
->ext
.block
.case_list
;
8905 /* Check for repeated cases. */
8906 for (tail
= code
->block
; tail
; tail
= tail
->block
)
8908 gfc_case
*d
= tail
->ext
.block
.case_list
;
8912 if (c
->ts
.type
== d
->ts
.type
8913 && ((c
->ts
.type
== BT_DERIVED
8914 && c
->ts
.u
.derived
&& d
->ts
.u
.derived
8915 && !strcmp (c
->ts
.u
.derived
->name
,
8916 d
->ts
.u
.derived
->name
))
8917 || c
->ts
.type
== BT_UNKNOWN
8918 || (!(c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8919 && c
->ts
.kind
== d
->ts
.kind
)))
8921 gfc_error ("TYPE IS at %L overlaps with TYPE IS at %L",
8922 &c
->where
, &d
->where
);
8928 /* Check F03:C815. */
8929 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8930 && !selector_type
->attr
.unlimited_polymorphic
8931 && !gfc_type_is_extensible (c
->ts
.u
.derived
))
8933 gfc_error ("Derived type %qs at %L must be extensible",
8934 c
->ts
.u
.derived
->name
, &c
->where
);
8939 /* Check F03:C816. */
8940 if (c
->ts
.type
!= BT_UNKNOWN
&& !selector_type
->attr
.unlimited_polymorphic
8941 && ((c
->ts
.type
!= BT_DERIVED
&& c
->ts
.type
!= BT_CLASS
)
8942 || !gfc_type_is_extension_of (selector_type
, c
->ts
.u
.derived
)))
8944 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8945 gfc_error ("Derived type %qs at %L must be an extension of %qs",
8946 c
->ts
.u
.derived
->name
, &c
->where
, selector_type
->name
);
8948 gfc_error ("Unexpected intrinsic type %qs at %L",
8949 gfc_basic_typename (c
->ts
.type
), &c
->where
);
8954 /* Check F03:C814. */
8955 if (c
->ts
.type
== BT_CHARACTER
8956 && (c
->ts
.u
.cl
->length
!= NULL
|| c
->ts
.deferred
))
8958 gfc_error ("The type-spec at %L shall specify that each length "
8959 "type parameter is assumed", &c
->where
);
8964 /* Intercept the DEFAULT case. */
8965 if (c
->ts
.type
== BT_UNKNOWN
)
8967 /* Check F03:C818. */
8970 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8971 "by a second DEFAULT CASE at %L",
8972 &default_case
->ext
.block
.case_list
->where
, &c
->where
);
8977 default_case
= body
;
8984 /* Transform SELECT TYPE statement to BLOCK and associate selector to
8985 target if present. If there are any EXIT statements referring to the
8986 SELECT TYPE construct, this is no problem because the gfc_code
8987 reference stays the same and EXIT is equally possible from the BLOCK
8988 it is changed to. */
8989 code
->op
= EXEC_BLOCK
;
8992 gfc_association_list
* assoc
;
8994 assoc
= gfc_get_association_list ();
8995 assoc
->st
= code
->expr1
->symtree
;
8996 assoc
->target
= gfc_copy_expr (code
->expr2
);
8997 assoc
->target
->where
= code
->expr2
->where
;
8998 /* assoc->variable will be set by resolve_assoc_var. */
9000 code
->ext
.block
.assoc
= assoc
;
9001 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
9003 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
9006 code
->ext
.block
.assoc
= NULL
;
9008 /* Ensure that the selector rank and arrayspec are available to
9009 correct expressions in which they might be missing. */
9010 if (code
->expr2
&& code
->expr2
->rank
)
9012 rank
= code
->expr2
->rank
;
9013 for (ref
= code
->expr2
->ref
; ref
; ref
= ref
->next
)
9014 if (ref
->next
== NULL
)
9016 if (ref
&& ref
->type
== REF_ARRAY
)
9017 ref
= gfc_copy_ref (ref
);
9019 /* Fixup expr1 if necessary. */
9021 fixup_array_ref (&code
->expr1
, code
->expr2
, rank
, ref
);
9023 else if (code
->expr1
->rank
)
9025 rank
= code
->expr1
->rank
;
9026 for (ref
= code
->expr1
->ref
; ref
; ref
= ref
->next
)
9027 if (ref
->next
== NULL
)
9029 if (ref
&& ref
->type
== REF_ARRAY
)
9030 ref
= gfc_copy_ref (ref
);
9033 /* Add EXEC_SELECT to switch on type. */
9034 new_st
= gfc_get_code (code
->op
);
9035 new_st
->expr1
= code
->expr1
;
9036 new_st
->expr2
= code
->expr2
;
9037 new_st
->block
= code
->block
;
9038 code
->expr1
= code
->expr2
= NULL
;
9043 ns
->code
->next
= new_st
;
9045 code
->op
= EXEC_SELECT_TYPE
;
9047 /* Use the intrinsic LOC function to generate an integer expression
9048 for the vtable of the selector. Note that the rank of the selector
9049 expression has to be set to zero. */
9050 gfc_add_vptr_component (code
->expr1
);
9051 code
->expr1
->rank
= 0;
9052 code
->expr1
= build_loc_call (code
->expr1
);
9053 selector_expr
= code
->expr1
->value
.function
.actual
->expr
;
9055 /* Loop over TYPE IS / CLASS IS cases. */
9056 for (body
= code
->block
; body
; body
= body
->block
)
9060 c
= body
->ext
.block
.case_list
;
9062 /* Generate an index integer expression for address of the
9063 TYPE/CLASS vtable and store it in c->low. The hash expression
9064 is stored in c->high and is used to resolve intrinsic cases. */
9065 if (c
->ts
.type
!= BT_UNKNOWN
)
9067 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9069 vtab
= gfc_find_derived_vtab (c
->ts
.u
.derived
);
9071 c
->high
= gfc_get_int_expr (gfc_integer_4_kind
, NULL
,
9072 c
->ts
.u
.derived
->hash_value
);
9076 vtab
= gfc_find_vtab (&c
->ts
);
9077 gcc_assert (vtab
&& CLASS_DATA (vtab
)->initializer
);
9078 e
= CLASS_DATA (vtab
)->initializer
;
9079 c
->high
= gfc_copy_expr (e
);
9080 if (c
->high
->ts
.kind
!= gfc_integer_4_kind
)
9083 ts
.kind
= gfc_integer_4_kind
;
9084 ts
.type
= BT_INTEGER
;
9085 gfc_convert_type_warn (c
->high
, &ts
, 2, 0);
9089 e
= gfc_lval_expr_from_sym (vtab
);
9090 c
->low
= build_loc_call (e
);
9095 /* Associate temporary to selector. This should only be done
9096 when this case is actually true, so build a new ASSOCIATE
9097 that does precisely this here (instead of using the
9100 if (c
->ts
.type
== BT_CLASS
)
9101 sprintf (name
, "__tmp_class_%s", c
->ts
.u
.derived
->name
);
9102 else if (c
->ts
.type
== BT_DERIVED
)
9103 sprintf (name
, "__tmp_type_%s", c
->ts
.u
.derived
->name
);
9104 else if (c
->ts
.type
== BT_CHARACTER
)
9106 HOST_WIDE_INT charlen
= 0;
9107 if (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9108 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9109 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9110 snprintf (name
, sizeof (name
),
9111 "__tmp_%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9112 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9115 sprintf (name
, "__tmp_%s_%d", gfc_basic_typename (c
->ts
.type
),
9118 st
= gfc_find_symtree (ns
->sym_root
, name
);
9119 gcc_assert (st
->n
.sym
->assoc
);
9120 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9121 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9122 if (c
->ts
.type
!= BT_CLASS
&& c
->ts
.type
!= BT_UNKNOWN
)
9124 gfc_add_data_component (st
->n
.sym
->assoc
->target
);
9125 /* Fixup the target expression if necessary. */
9127 fixup_array_ref (&st
->n
.sym
->assoc
->target
, NULL
, rank
, ref
);
9130 new_st
= gfc_get_code (EXEC_BLOCK
);
9131 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9132 new_st
->ext
.block
.ns
->code
= body
->next
;
9133 body
->next
= new_st
;
9135 /* Chain in the new list only if it is marked as dangling. Otherwise
9136 there is a CASE label overlap and this is already used. Just ignore,
9137 the error is diagnosed elsewhere. */
9138 if (st
->n
.sym
->assoc
->dangling
)
9140 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9141 st
->n
.sym
->assoc
->dangling
= 0;
9144 resolve_assoc_var (st
->n
.sym
, false);
9147 /* Take out CLASS IS cases for separate treatment. */
9149 while (body
&& body
->block
)
9151 if (body
->block
->ext
.block
.case_list
->ts
.type
== BT_CLASS
)
9153 /* Add to class_is list. */
9154 if (class_is
== NULL
)
9156 class_is
= body
->block
;
9161 for (tail
= class_is
; tail
->block
; tail
= tail
->block
) ;
9162 tail
->block
= body
->block
;
9165 /* Remove from EXEC_SELECT list. */
9166 body
->block
= body
->block
->block
;
9179 /* Add a default case to hold the CLASS IS cases. */
9180 for (tail
= code
; tail
->block
; tail
= tail
->block
) ;
9181 tail
->block
= gfc_get_code (EXEC_SELECT_TYPE
);
9183 tail
->ext
.block
.case_list
= gfc_get_case ();
9184 tail
->ext
.block
.case_list
->ts
.type
= BT_UNKNOWN
;
9186 default_case
= tail
;
9189 /* More than one CLASS IS block? */
9190 if (class_is
->block
)
9194 /* Sort CLASS IS blocks by extension level. */
9198 for (c1
= &class_is
; (*c1
) && (*c1
)->block
; c1
= &((*c1
)->block
))
9201 /* F03:C817 (check for doubles). */
9202 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->hash_value
9203 == c2
->ext
.block
.case_list
->ts
.u
.derived
->hash_value
)
9205 gfc_error ("Double CLASS IS block in SELECT TYPE "
9207 &c2
->ext
.block
.case_list
->where
);
9210 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
9211 < c2
->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
)
9214 (*c1
)->block
= c2
->block
;
9224 /* Generate IF chain. */
9225 if_st
= gfc_get_code (EXEC_IF
);
9227 for (body
= class_is
; body
; body
= body
->block
)
9229 new_st
->block
= gfc_get_code (EXEC_IF
);
9230 new_st
= new_st
->block
;
9231 /* Set up IF condition: Call _gfortran_is_extension_of. */
9232 new_st
->expr1
= gfc_get_expr ();
9233 new_st
->expr1
->expr_type
= EXPR_FUNCTION
;
9234 new_st
->expr1
->ts
.type
= BT_LOGICAL
;
9235 new_st
->expr1
->ts
.kind
= 4;
9236 new_st
->expr1
->value
.function
.name
= gfc_get_string (PREFIX ("is_extension_of"));
9237 new_st
->expr1
->value
.function
.isym
= XCNEW (gfc_intrinsic_sym
);
9238 new_st
->expr1
->value
.function
.isym
->id
= GFC_ISYM_EXTENDS_TYPE_OF
;
9239 /* Set up arguments. */
9240 new_st
->expr1
->value
.function
.actual
= gfc_get_actual_arglist ();
9241 new_st
->expr1
->value
.function
.actual
->expr
= gfc_get_variable_expr (selector_expr
->symtree
);
9242 new_st
->expr1
->value
.function
.actual
->expr
->where
= code
->loc
;
9243 new_st
->expr1
->where
= code
->loc
;
9244 gfc_add_vptr_component (new_st
->expr1
->value
.function
.actual
->expr
);
9245 vtab
= gfc_find_derived_vtab (body
->ext
.block
.case_list
->ts
.u
.derived
);
9246 st
= gfc_find_symtree (vtab
->ns
->sym_root
, vtab
->name
);
9247 new_st
->expr1
->value
.function
.actual
->next
= gfc_get_actual_arglist ();
9248 new_st
->expr1
->value
.function
.actual
->next
->expr
= gfc_get_variable_expr (st
);
9249 new_st
->expr1
->value
.function
.actual
->next
->expr
->where
= code
->loc
;
9250 new_st
->next
= body
->next
;
9252 if (default_case
->next
)
9254 new_st
->block
= gfc_get_code (EXEC_IF
);
9255 new_st
= new_st
->block
;
9256 new_st
->next
= default_case
->next
;
9259 /* Replace CLASS DEFAULT code by the IF chain. */
9260 default_case
->next
= if_st
;
9263 /* Resolve the internal code. This can not be done earlier because
9264 it requires that the sym->assoc of selectors is set already. */
9265 gfc_current_ns
= ns
;
9266 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9267 gfc_current_ns
= old_ns
;
9274 /* Resolve a transfer statement. This is making sure that:
9275 -- a derived type being transferred has only non-pointer components
9276 -- a derived type being transferred doesn't have private components, unless
9277 it's being transferred from the module where the type was defined
9278 -- we're not trying to transfer a whole assumed size array. */
9281 resolve_transfer (gfc_code
*code
)
9283 gfc_symbol
*sym
, *derived
;
9287 bool formatted
= false;
9288 gfc_dt
*dt
= code
->ext
.dt
;
9289 gfc_symbol
*dtio_sub
= NULL
;
9293 while (exp
!= NULL
&& exp
->expr_type
== EXPR_OP
9294 && exp
->value
.op
.op
== INTRINSIC_PARENTHESES
)
9295 exp
= exp
->value
.op
.op1
;
9297 if (exp
&& exp
->expr_type
== EXPR_NULL
9300 gfc_error ("Invalid context for NULL () intrinsic at %L",
9305 if (exp
== NULL
|| (exp
->expr_type
!= EXPR_VARIABLE
9306 && exp
->expr_type
!= EXPR_FUNCTION
9307 && exp
->expr_type
!= EXPR_STRUCTURE
))
9310 /* If we are reading, the variable will be changed. Note that
9311 code->ext.dt may be NULL if the TRANSFER is related to
9312 an INQUIRE statement -- but in this case, we are not reading, either. */
9313 if (dt
&& dt
->dt_io_kind
->value
.iokind
== M_READ
9314 && !gfc_check_vardef_context (exp
, false, false, false,
9318 const gfc_typespec
*ts
= exp
->expr_type
== EXPR_STRUCTURE
9319 || exp
->expr_type
== EXPR_FUNCTION
9320 ? &exp
->ts
: &exp
->symtree
->n
.sym
->ts
;
9322 /* Go to actual component transferred. */
9323 for (ref
= exp
->ref
; ref
; ref
= ref
->next
)
9324 if (ref
->type
== REF_COMPONENT
)
9325 ts
= &ref
->u
.c
.component
->ts
;
9327 if (dt
&& dt
->dt_io_kind
->value
.iokind
!= M_INQUIRE
9328 && (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
))
9330 if (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
)
9331 derived
= ts
->u
.derived
;
9333 derived
= ts
->u
.derived
->components
->ts
.u
.derived
;
9335 /* Determine when to use the formatted DTIO procedure. */
9336 if (dt
&& (dt
->format_expr
|| dt
->format_label
))
9339 write
= dt
->dt_io_kind
->value
.iokind
== M_WRITE
9340 || dt
->dt_io_kind
->value
.iokind
== M_PRINT
;
9341 dtio_sub
= gfc_find_specific_dtio_proc (derived
, write
, formatted
);
9343 if (dtio_sub
!= NULL
&& exp
->expr_type
== EXPR_VARIABLE
)
9346 sym
= exp
->symtree
->n
.sym
->ns
->proc_name
;
9347 /* Check to see if this is a nested DTIO call, with the
9348 dummy as the io-list object. */
9349 if (sym
&& sym
== dtio_sub
&& sym
->formal
9350 && sym
->formal
->sym
== exp
->symtree
->n
.sym
9351 && exp
->ref
== NULL
)
9353 if (!sym
->attr
.recursive
)
9355 gfc_error ("DTIO %s procedure at %L must be recursive",
9356 sym
->name
, &sym
->declared_at
);
9363 if (ts
->type
== BT_CLASS
&& dtio_sub
== NULL
)
9365 gfc_error ("Data transfer element at %L cannot be polymorphic unless "
9366 "it is processed by a defined input/output procedure",
9371 if (ts
->type
== BT_DERIVED
)
9373 /* Check that transferred derived type doesn't contain POINTER
9374 components unless it is processed by a defined input/output
9376 if (ts
->u
.derived
->attr
.pointer_comp
&& dtio_sub
== NULL
)
9378 gfc_error ("Data transfer element at %L cannot have POINTER "
9379 "components unless it is processed by a defined "
9380 "input/output procedure", &code
->loc
);
9385 if (ts
->u
.derived
->attr
.proc_pointer_comp
)
9387 gfc_error ("Data transfer element at %L cannot have "
9388 "procedure pointer components", &code
->loc
);
9392 if (ts
->u
.derived
->attr
.alloc_comp
&& dtio_sub
== NULL
)
9394 gfc_error ("Data transfer element at %L cannot have ALLOCATABLE "
9395 "components unless it is processed by a defined "
9396 "input/output procedure", &code
->loc
);
9400 /* C_PTR and C_FUNPTR have private components which means they can not
9401 be printed. However, if -std=gnu and not -pedantic, allow
9402 the component to be printed to help debugging. */
9403 if (ts
->u
.derived
->ts
.f90_type
== BT_VOID
)
9405 if (!gfc_notify_std (GFC_STD_GNU
, "Data transfer element at %L "
9406 "cannot have PRIVATE components", &code
->loc
))
9409 else if (derived_inaccessible (ts
->u
.derived
) && dtio_sub
== NULL
)
9411 gfc_error ("Data transfer element at %L cannot have "
9412 "PRIVATE components unless it is processed by "
9413 "a defined input/output procedure", &code
->loc
);
9418 if (exp
->expr_type
== EXPR_STRUCTURE
)
9421 sym
= exp
->symtree
->n
.sym
;
9423 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SIZE
&& exp
->ref
9424 && exp
->ref
->type
== REF_ARRAY
&& exp
->ref
->u
.ar
.type
== AR_FULL
)
9426 gfc_error ("Data transfer element at %L cannot be a full reference to "
9427 "an assumed-size array", &code
->loc
);
9431 if (async_io_dt
&& exp
->expr_type
== EXPR_VARIABLE
)
9432 exp
->symtree
->n
.sym
->attr
.asynchronous
= 1;
9436 /*********** Toplevel code resolution subroutines ***********/
9438 /* Find the set of labels that are reachable from this block. We also
9439 record the last statement in each block. */
9442 find_reachable_labels (gfc_code
*block
)
9449 cs_base
->reachable_labels
= bitmap_alloc (&labels_obstack
);
9451 /* Collect labels in this block. We don't keep those corresponding
9452 to END {IF|SELECT}, these are checked in resolve_branch by going
9453 up through the code_stack. */
9454 for (c
= block
; c
; c
= c
->next
)
9456 if (c
->here
&& c
->op
!= EXEC_END_NESTED_BLOCK
)
9457 bitmap_set_bit (cs_base
->reachable_labels
, c
->here
->value
);
9460 /* Merge with labels from parent block. */
9463 gcc_assert (cs_base
->prev
->reachable_labels
);
9464 bitmap_ior_into (cs_base
->reachable_labels
,
9465 cs_base
->prev
->reachable_labels
);
9471 resolve_lock_unlock_event (gfc_code
*code
)
9473 if (code
->expr1
->expr_type
== EXPR_FUNCTION
9474 && code
->expr1
->value
.function
.isym
9475 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
9476 remove_caf_get_intrinsic (code
->expr1
);
9478 if ((code
->op
== EXEC_LOCK
|| code
->op
== EXEC_UNLOCK
)
9479 && (code
->expr1
->ts
.type
!= BT_DERIVED
9480 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9481 || code
->expr1
->ts
.u
.derived
->from_intmod
!= INTMOD_ISO_FORTRAN_ENV
9482 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
!= ISOFORTRAN_LOCK_TYPE
9483 || code
->expr1
->rank
!= 0
9484 || (!gfc_is_coarray (code
->expr1
) &&
9485 !gfc_is_coindexed (code
->expr1
))))
9486 gfc_error ("Lock variable at %L must be a scalar of type LOCK_TYPE",
9487 &code
->expr1
->where
);
9488 else if ((code
->op
== EXEC_EVENT_POST
|| code
->op
== EXEC_EVENT_WAIT
)
9489 && (code
->expr1
->ts
.type
!= BT_DERIVED
9490 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9491 || code
->expr1
->ts
.u
.derived
->from_intmod
9492 != INTMOD_ISO_FORTRAN_ENV
9493 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
9494 != ISOFORTRAN_EVENT_TYPE
9495 || code
->expr1
->rank
!= 0))
9496 gfc_error ("Event variable at %L must be a scalar of type EVENT_TYPE",
9497 &code
->expr1
->where
);
9498 else if (code
->op
== EXEC_EVENT_POST
&& !gfc_is_coarray (code
->expr1
)
9499 && !gfc_is_coindexed (code
->expr1
))
9500 gfc_error ("Event variable argument at %L must be a coarray or coindexed",
9501 &code
->expr1
->where
);
9502 else if (code
->op
== EXEC_EVENT_WAIT
&& !gfc_is_coarray (code
->expr1
))
9503 gfc_error ("Event variable argument at %L must be a coarray but not "
9504 "coindexed", &code
->expr1
->where
);
9508 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9509 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9510 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9511 &code
->expr2
->where
);
9514 && !gfc_check_vardef_context (code
->expr2
, false, false, false,
9515 _("STAT variable")))
9520 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9521 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9522 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9523 &code
->expr3
->where
);
9526 && !gfc_check_vardef_context (code
->expr3
, false, false, false,
9527 _("ERRMSG variable")))
9530 /* Check for LOCK the ACQUIRED_LOCK. */
9531 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9532 && (code
->expr4
->ts
.type
!= BT_LOGICAL
|| code
->expr4
->rank
!= 0
9533 || code
->expr4
->expr_type
!= EXPR_VARIABLE
))
9534 gfc_error ("ACQUIRED_LOCK= argument at %L must be a scalar LOGICAL "
9535 "variable", &code
->expr4
->where
);
9537 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9538 && !gfc_check_vardef_context (code
->expr4
, false, false, false,
9539 _("ACQUIRED_LOCK variable")))
9542 /* Check for EVENT WAIT the UNTIL_COUNT. */
9543 if (code
->op
== EXEC_EVENT_WAIT
&& code
->expr4
)
9545 if (!gfc_resolve_expr (code
->expr4
) || code
->expr4
->ts
.type
!= BT_INTEGER
9546 || code
->expr4
->rank
!= 0)
9547 gfc_error ("UNTIL_COUNT= argument at %L must be a scalar INTEGER "
9548 "expression", &code
->expr4
->where
);
9554 resolve_critical (gfc_code
*code
)
9556 gfc_symtree
*symtree
;
9557 gfc_symbol
*lock_type
;
9558 char name
[GFC_MAX_SYMBOL_LEN
];
9559 static int serial
= 0;
9561 if (flag_coarray
!= GFC_FCOARRAY_LIB
)
9564 symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
9565 GFC_PREFIX ("lock_type"));
9567 lock_type
= symtree
->n
.sym
;
9570 if (gfc_get_sym_tree (GFC_PREFIX ("lock_type"), gfc_current_ns
, &symtree
,
9573 lock_type
= symtree
->n
.sym
;
9574 lock_type
->attr
.flavor
= FL_DERIVED
;
9575 lock_type
->attr
.zero_comp
= 1;
9576 lock_type
->from_intmod
= INTMOD_ISO_FORTRAN_ENV
;
9577 lock_type
->intmod_sym_id
= ISOFORTRAN_LOCK_TYPE
;
9580 sprintf(name
, GFC_PREFIX ("lock_var") "%d",serial
++);
9581 if (gfc_get_sym_tree (name
, gfc_current_ns
, &symtree
, false) != 0)
9584 code
->resolved_sym
= symtree
->n
.sym
;
9585 symtree
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
9586 symtree
->n
.sym
->attr
.referenced
= 1;
9587 symtree
->n
.sym
->attr
.artificial
= 1;
9588 symtree
->n
.sym
->attr
.codimension
= 1;
9589 symtree
->n
.sym
->ts
.type
= BT_DERIVED
;
9590 symtree
->n
.sym
->ts
.u
.derived
= lock_type
;
9591 symtree
->n
.sym
->as
= gfc_get_array_spec ();
9592 symtree
->n
.sym
->as
->corank
= 1;
9593 symtree
->n
.sym
->as
->type
= AS_EXPLICIT
;
9594 symtree
->n
.sym
->as
->cotype
= AS_EXPLICIT
;
9595 symtree
->n
.sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
,
9597 gfc_commit_symbols();
9602 resolve_sync (gfc_code
*code
)
9604 /* Check imageset. The * case matches expr1 == NULL. */
9607 if (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
> 1)
9608 gfc_error ("Imageset argument at %L must be a scalar or rank-1 "
9609 "INTEGER expression", &code
->expr1
->where
);
9610 if (code
->expr1
->expr_type
== EXPR_CONSTANT
&& code
->expr1
->rank
== 0
9611 && mpz_cmp_si (code
->expr1
->value
.integer
, 1) < 0)
9612 gfc_error ("Imageset argument at %L must between 1 and num_images()",
9613 &code
->expr1
->where
);
9614 else if (code
->expr1
->expr_type
== EXPR_ARRAY
9615 && gfc_simplify_expr (code
->expr1
, 0))
9617 gfc_constructor
*cons
;
9618 cons
= gfc_constructor_first (code
->expr1
->value
.constructor
);
9619 for (; cons
; cons
= gfc_constructor_next (cons
))
9620 if (cons
->expr
->expr_type
== EXPR_CONSTANT
9621 && mpz_cmp_si (cons
->expr
->value
.integer
, 1) < 0)
9622 gfc_error ("Imageset argument at %L must between 1 and "
9623 "num_images()", &cons
->expr
->where
);
9628 gfc_resolve_expr (code
->expr2
);
9630 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9631 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9632 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9633 &code
->expr2
->where
);
9636 gfc_resolve_expr (code
->expr3
);
9638 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9639 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9640 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9641 &code
->expr3
->where
);
9645 /* Given a branch to a label, see if the branch is conforming.
9646 The code node describes where the branch is located. */
9649 resolve_branch (gfc_st_label
*label
, gfc_code
*code
)
9656 /* Step one: is this a valid branching target? */
9658 if (label
->defined
== ST_LABEL_UNKNOWN
)
9660 gfc_error ("Label %d referenced at %L is never defined", label
->value
,
9665 if (label
->defined
!= ST_LABEL_TARGET
&& label
->defined
!= ST_LABEL_DO_TARGET
)
9667 gfc_error ("Statement at %L is not a valid branch target statement "
9668 "for the branch statement at %L", &label
->where
, &code
->loc
);
9672 /* Step two: make sure this branch is not a branch to itself ;-) */
9674 if (code
->here
== label
)
9677 "Branch at %L may result in an infinite loop", &code
->loc
);
9681 /* Step three: See if the label is in the same block as the
9682 branching statement. The hard work has been done by setting up
9683 the bitmap reachable_labels. */
9685 if (bitmap_bit_p (cs_base
->reachable_labels
, label
->value
))
9687 /* Check now whether there is a CRITICAL construct; if so, check
9688 whether the label is still visible outside of the CRITICAL block,
9689 which is invalid. */
9690 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9692 if (stack
->current
->op
== EXEC_CRITICAL
9693 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9694 gfc_error ("GOTO statement at %L leaves CRITICAL construct for "
9695 "label at %L", &code
->loc
, &label
->where
);
9696 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
9697 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9698 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct "
9699 "for label at %L", &code
->loc
, &label
->where
);
9705 /* Step four: If we haven't found the label in the bitmap, it may
9706 still be the label of the END of the enclosing block, in which
9707 case we find it by going up the code_stack. */
9709 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9711 if (stack
->current
->next
&& stack
->current
->next
->here
== label
)
9713 if (stack
->current
->op
== EXEC_CRITICAL
)
9715 /* Note: A label at END CRITICAL does not leave the CRITICAL
9716 construct as END CRITICAL is still part of it. */
9717 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
9718 " at %L", &code
->loc
, &label
->where
);
9721 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
)
9723 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct for "
9724 "label at %L", &code
->loc
, &label
->where
);
9731 gcc_assert (stack
->current
->next
->op
== EXEC_END_NESTED_BLOCK
);
9735 /* The label is not in an enclosing block, so illegal. This was
9736 allowed in Fortran 66, so we allow it as extension. No
9737 further checks are necessary in this case. */
9738 gfc_notify_std (GFC_STD_LEGACY
, "Label at %L is not in the same block "
9739 "as the GOTO statement at %L", &label
->where
,
9745 /* Check whether EXPR1 has the same shape as EXPR2. */
9748 resolve_where_shape (gfc_expr
*expr1
, gfc_expr
*expr2
)
9750 mpz_t shape
[GFC_MAX_DIMENSIONS
];
9751 mpz_t shape2
[GFC_MAX_DIMENSIONS
];
9752 bool result
= false;
9755 /* Compare the rank. */
9756 if (expr1
->rank
!= expr2
->rank
)
9759 /* Compare the size of each dimension. */
9760 for (i
=0; i
<expr1
->rank
; i
++)
9762 if (!gfc_array_dimen_size (expr1
, i
, &shape
[i
]))
9765 if (!gfc_array_dimen_size (expr2
, i
, &shape2
[i
]))
9768 if (mpz_cmp (shape
[i
], shape2
[i
]))
9772 /* When either of the two expression is an assumed size array, we
9773 ignore the comparison of dimension sizes. */
9778 gfc_clear_shape (shape
, i
);
9779 gfc_clear_shape (shape2
, i
);
9784 /* Check whether a WHERE assignment target or a WHERE mask expression
9785 has the same shape as the outmost WHERE mask expression. */
9788 resolve_where (gfc_code
*code
, gfc_expr
*mask
)
9794 cblock
= code
->block
;
9796 /* Store the first WHERE mask-expr of the WHERE statement or construct.
9797 In case of nested WHERE, only the outmost one is stored. */
9798 if (mask
== NULL
) /* outmost WHERE */
9800 else /* inner WHERE */
9807 /* Check if the mask-expr has a consistent shape with the
9808 outmost WHERE mask-expr. */
9809 if (!resolve_where_shape (cblock
->expr1
, e
))
9810 gfc_error ("WHERE mask at %L has inconsistent shape",
9811 &cblock
->expr1
->where
);
9814 /* the assignment statement of a WHERE statement, or the first
9815 statement in where-body-construct of a WHERE construct */
9816 cnext
= cblock
->next
;
9821 /* WHERE assignment statement */
9824 /* Check shape consistent for WHERE assignment target. */
9825 if (e
&& !resolve_where_shape (cnext
->expr1
, e
))
9826 gfc_error ("WHERE assignment target at %L has "
9827 "inconsistent shape", &cnext
->expr1
->where
);
9831 case EXEC_ASSIGN_CALL
:
9832 resolve_call (cnext
);
9833 if (!cnext
->resolved_sym
->attr
.elemental
)
9834 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9835 &cnext
->ext
.actual
->expr
->where
);
9838 /* WHERE or WHERE construct is part of a where-body-construct */
9840 resolve_where (cnext
, e
);
9844 gfc_error ("Unsupported statement inside WHERE at %L",
9847 /* the next statement within the same where-body-construct */
9848 cnext
= cnext
->next
;
9850 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
9851 cblock
= cblock
->block
;
9856 /* Resolve assignment in FORALL construct.
9857 NVAR is the number of FORALL index variables, and VAR_EXPR records the
9858 FORALL index variables. */
9861 gfc_resolve_assign_in_forall (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
9865 for (n
= 0; n
< nvar
; n
++)
9867 gfc_symbol
*forall_index
;
9869 forall_index
= var_expr
[n
]->symtree
->n
.sym
;
9871 /* Check whether the assignment target is one of the FORALL index
9873 if ((code
->expr1
->expr_type
== EXPR_VARIABLE
)
9874 && (code
->expr1
->symtree
->n
.sym
== forall_index
))
9875 gfc_error ("Assignment to a FORALL index variable at %L",
9876 &code
->expr1
->where
);
9879 /* If one of the FORALL index variables doesn't appear in the
9880 assignment variable, then there could be a many-to-one
9881 assignment. Emit a warning rather than an error because the
9882 mask could be resolving this problem. */
9883 if (!find_forall_index (code
->expr1
, forall_index
, 0))
9884 gfc_warning (0, "The FORALL with index %qs is not used on the "
9885 "left side of the assignment at %L and so might "
9886 "cause multiple assignment to this object",
9887 var_expr
[n
]->symtree
->name
, &code
->expr1
->where
);
9893 /* Resolve WHERE statement in FORALL construct. */
9896 gfc_resolve_where_code_in_forall (gfc_code
*code
, int nvar
,
9897 gfc_expr
**var_expr
)
9902 cblock
= code
->block
;
9905 /* the assignment statement of a WHERE statement, or the first
9906 statement in where-body-construct of a WHERE construct */
9907 cnext
= cblock
->next
;
9912 /* WHERE assignment statement */
9914 gfc_resolve_assign_in_forall (cnext
, nvar
, var_expr
);
9917 /* WHERE operator assignment statement */
9918 case EXEC_ASSIGN_CALL
:
9919 resolve_call (cnext
);
9920 if (!cnext
->resolved_sym
->attr
.elemental
)
9921 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9922 &cnext
->ext
.actual
->expr
->where
);
9925 /* WHERE or WHERE construct is part of a where-body-construct */
9927 gfc_resolve_where_code_in_forall (cnext
, nvar
, var_expr
);
9931 gfc_error ("Unsupported statement inside WHERE at %L",
9934 /* the next statement within the same where-body-construct */
9935 cnext
= cnext
->next
;
9937 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
9938 cblock
= cblock
->block
;
9943 /* Traverse the FORALL body to check whether the following errors exist:
9944 1. For assignment, check if a many-to-one assignment happens.
9945 2. For WHERE statement, check the WHERE body to see if there is any
9946 many-to-one assignment. */
9949 gfc_resolve_forall_body (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
9953 c
= code
->block
->next
;
9959 case EXEC_POINTER_ASSIGN
:
9960 gfc_resolve_assign_in_forall (c
, nvar
, var_expr
);
9963 case EXEC_ASSIGN_CALL
:
9967 /* Because the gfc_resolve_blocks() will handle the nested FORALL,
9968 there is no need to handle it here. */
9972 gfc_resolve_where_code_in_forall(c
, nvar
, var_expr
);
9977 /* The next statement in the FORALL body. */
9983 /* Counts the number of iterators needed inside a forall construct, including
9984 nested forall constructs. This is used to allocate the needed memory
9985 in gfc_resolve_forall. */
9988 gfc_count_forall_iterators (gfc_code
*code
)
9990 int max_iters
, sub_iters
, current_iters
;
9991 gfc_forall_iterator
*fa
;
9993 gcc_assert(code
->op
== EXEC_FORALL
);
9997 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10000 code
= code
->block
->next
;
10004 if (code
->op
== EXEC_FORALL
)
10006 sub_iters
= gfc_count_forall_iterators (code
);
10007 if (sub_iters
> max_iters
)
10008 max_iters
= sub_iters
;
10013 return current_iters
+ max_iters
;
10017 /* Given a FORALL construct, first resolve the FORALL iterator, then call
10018 gfc_resolve_forall_body to resolve the FORALL body. */
10021 gfc_resolve_forall (gfc_code
*code
, gfc_namespace
*ns
, int forall_save
)
10023 static gfc_expr
**var_expr
;
10024 static int total_var
= 0;
10025 static int nvar
= 0;
10026 int i
, old_nvar
, tmp
;
10027 gfc_forall_iterator
*fa
;
10031 if (!gfc_notify_std (GFC_STD_F2018_OBS
, "FORALL construct at %L", &code
->loc
))
10034 /* Start to resolve a FORALL construct */
10035 if (forall_save
== 0)
10037 /* Count the total number of FORALL indices in the nested FORALL
10038 construct in order to allocate the VAR_EXPR with proper size. */
10039 total_var
= gfc_count_forall_iterators (code
);
10041 /* Allocate VAR_EXPR with NUMBER_OF_FORALL_INDEX elements. */
10042 var_expr
= XCNEWVEC (gfc_expr
*, total_var
);
10045 /* The information about FORALL iterator, including FORALL indices start, end
10046 and stride. An outer FORALL indice cannot appear in start, end or stride. */
10047 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10049 /* Fortran 20008: C738 (R753). */
10050 if (fa
->var
->ref
&& fa
->var
->ref
->type
== REF_ARRAY
)
10052 gfc_error ("FORALL index-name at %L must be a scalar variable "
10053 "of type integer", &fa
->var
->where
);
10057 /* Check if any outer FORALL index name is the same as the current
10059 for (i
= 0; i
< nvar
; i
++)
10061 if (fa
->var
->symtree
->n
.sym
== var_expr
[i
]->symtree
->n
.sym
)
10062 gfc_error ("An outer FORALL construct already has an index "
10063 "with this name %L", &fa
->var
->where
);
10066 /* Record the current FORALL index. */
10067 var_expr
[nvar
] = gfc_copy_expr (fa
->var
);
10071 /* No memory leak. */
10072 gcc_assert (nvar
<= total_var
);
10075 /* Resolve the FORALL body. */
10076 gfc_resolve_forall_body (code
, nvar
, var_expr
);
10078 /* May call gfc_resolve_forall to resolve the inner FORALL loop. */
10079 gfc_resolve_blocks (code
->block
, ns
);
10083 /* Free only the VAR_EXPRs allocated in this frame. */
10084 for (i
= nvar
; i
< tmp
; i
++)
10085 gfc_free_expr (var_expr
[i
]);
10089 /* We are in the outermost FORALL construct. */
10090 gcc_assert (forall_save
== 0);
10092 /* VAR_EXPR is not needed any more. */
10099 /* Resolve a BLOCK construct statement. */
10102 resolve_block_construct (gfc_code
* code
)
10104 /* Resolve the BLOCK's namespace. */
10105 gfc_resolve (code
->ext
.block
.ns
);
10107 /* For an ASSOCIATE block, the associations (and their targets) are already
10108 resolved during resolve_symbol. */
10112 /* Resolve lists of blocks found in IF, SELECT CASE, WHERE, FORALL, GOTO and
10116 gfc_resolve_blocks (gfc_code
*b
, gfc_namespace
*ns
)
10120 for (; b
; b
= b
->block
)
10122 t
= gfc_resolve_expr (b
->expr1
);
10123 if (!gfc_resolve_expr (b
->expr2
))
10129 if (t
&& b
->expr1
!= NULL
10130 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
!= 0))
10131 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
10137 && b
->expr1
!= NULL
10138 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
== 0))
10139 gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
10144 resolve_branch (b
->label1
, b
);
10148 resolve_block_construct (b
);
10152 case EXEC_SELECT_TYPE
:
10155 case EXEC_DO_WHILE
:
10156 case EXEC_DO_CONCURRENT
:
10157 case EXEC_CRITICAL
:
10160 case EXEC_IOLENGTH
:
10164 case EXEC_OMP_ATOMIC
:
10165 case EXEC_OACC_ATOMIC
:
10167 gfc_omp_atomic_op aop
10168 = (gfc_omp_atomic_op
) (b
->ext
.omp_atomic
& GFC_OMP_ATOMIC_MASK
);
10170 /* Verify this before calling gfc_resolve_code, which might
10172 gcc_assert (b
->next
&& b
->next
->op
== EXEC_ASSIGN
);
10173 gcc_assert (((aop
!= GFC_OMP_ATOMIC_CAPTURE
)
10174 && b
->next
->next
== NULL
)
10175 || ((aop
== GFC_OMP_ATOMIC_CAPTURE
)
10176 && b
->next
->next
!= NULL
10177 && b
->next
->next
->op
== EXEC_ASSIGN
10178 && b
->next
->next
->next
== NULL
));
10182 case EXEC_OACC_PARALLEL_LOOP
:
10183 case EXEC_OACC_PARALLEL
:
10184 case EXEC_OACC_KERNELS_LOOP
:
10185 case EXEC_OACC_KERNELS
:
10186 case EXEC_OACC_DATA
:
10187 case EXEC_OACC_HOST_DATA
:
10188 case EXEC_OACC_LOOP
:
10189 case EXEC_OACC_UPDATE
:
10190 case EXEC_OACC_WAIT
:
10191 case EXEC_OACC_CACHE
:
10192 case EXEC_OACC_ENTER_DATA
:
10193 case EXEC_OACC_EXIT_DATA
:
10194 case EXEC_OACC_ROUTINE
:
10195 case EXEC_OMP_CRITICAL
:
10196 case EXEC_OMP_DISTRIBUTE
:
10197 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
10198 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
10199 case EXEC_OMP_DISTRIBUTE_SIMD
:
10201 case EXEC_OMP_DO_SIMD
:
10202 case EXEC_OMP_MASTER
:
10203 case EXEC_OMP_ORDERED
:
10204 case EXEC_OMP_PARALLEL
:
10205 case EXEC_OMP_PARALLEL_DO
:
10206 case EXEC_OMP_PARALLEL_DO_SIMD
:
10207 case EXEC_OMP_PARALLEL_SECTIONS
:
10208 case EXEC_OMP_PARALLEL_WORKSHARE
:
10209 case EXEC_OMP_SECTIONS
:
10210 case EXEC_OMP_SIMD
:
10211 case EXEC_OMP_SINGLE
:
10212 case EXEC_OMP_TARGET
:
10213 case EXEC_OMP_TARGET_DATA
:
10214 case EXEC_OMP_TARGET_ENTER_DATA
:
10215 case EXEC_OMP_TARGET_EXIT_DATA
:
10216 case EXEC_OMP_TARGET_PARALLEL
:
10217 case EXEC_OMP_TARGET_PARALLEL_DO
:
10218 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
10219 case EXEC_OMP_TARGET_SIMD
:
10220 case EXEC_OMP_TARGET_TEAMS
:
10221 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
10222 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10223 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10224 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
10225 case EXEC_OMP_TARGET_UPDATE
:
10226 case EXEC_OMP_TASK
:
10227 case EXEC_OMP_TASKGROUP
:
10228 case EXEC_OMP_TASKLOOP
:
10229 case EXEC_OMP_TASKLOOP_SIMD
:
10230 case EXEC_OMP_TASKWAIT
:
10231 case EXEC_OMP_TASKYIELD
:
10232 case EXEC_OMP_TEAMS
:
10233 case EXEC_OMP_TEAMS_DISTRIBUTE
:
10234 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10235 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10236 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
10237 case EXEC_OMP_WORKSHARE
:
10241 gfc_internal_error ("gfc_resolve_blocks(): Bad block type");
10244 gfc_resolve_code (b
->next
, ns
);
10249 /* Does everything to resolve an ordinary assignment. Returns true
10250 if this is an interface assignment. */
10252 resolve_ordinary_assign (gfc_code
*code
, gfc_namespace
*ns
)
10259 symbol_attribute attr
;
10261 if (gfc_extend_assign (code
, ns
))
10265 if (code
->op
== EXEC_ASSIGN_CALL
)
10267 lhs
= code
->ext
.actual
->expr
;
10268 rhsptr
= &code
->ext
.actual
->next
->expr
;
10272 gfc_actual_arglist
* args
;
10273 gfc_typebound_proc
* tbp
;
10275 gcc_assert (code
->op
== EXEC_COMPCALL
);
10277 args
= code
->expr1
->value
.compcall
.actual
;
10279 rhsptr
= &args
->next
->expr
;
10281 tbp
= code
->expr1
->value
.compcall
.tbp
;
10282 gcc_assert (!tbp
->is_generic
);
10285 /* Make a temporary rhs when there is a default initializer
10286 and rhs is the same symbol as the lhs. */
10287 if ((*rhsptr
)->expr_type
== EXPR_VARIABLE
10288 && (*rhsptr
)->symtree
->n
.sym
->ts
.type
== BT_DERIVED
10289 && gfc_has_default_initializer ((*rhsptr
)->symtree
->n
.sym
->ts
.u
.derived
)
10290 && (lhs
->symtree
->n
.sym
== (*rhsptr
)->symtree
->n
.sym
))
10291 *rhsptr
= gfc_get_parentheses (*rhsptr
);
10300 && !gfc_notify_std (GFC_STD_GNU
, "BOZ literal at %L outside "
10301 "a DATA statement and outside INT/REAL/DBLE/CMPLX",
10305 /* Handle the case of a BOZ literal on the RHS. */
10306 if (rhs
->is_boz
&& lhs
->ts
.type
!= BT_INTEGER
)
10309 if (warn_surprising
)
10310 gfc_warning (OPT_Wsurprising
,
10311 "BOZ literal at %L is bitwise transferred "
10312 "non-integer symbol %qs", &code
->loc
,
10313 lhs
->symtree
->n
.sym
->name
);
10315 if (!gfc_convert_boz (rhs
, &lhs
->ts
))
10317 if ((rc
= gfc_range_check (rhs
)) != ARITH_OK
)
10319 if (rc
== ARITH_UNDERFLOW
)
10320 gfc_error ("Arithmetic underflow of bit-wise transferred BOZ at %L"
10321 ". This check can be disabled with the option "
10322 "%<-fno-range-check%>", &rhs
->where
);
10323 else if (rc
== ARITH_OVERFLOW
)
10324 gfc_error ("Arithmetic overflow of bit-wise transferred BOZ at %L"
10325 ". This check can be disabled with the option "
10326 "%<-fno-range-check%>", &rhs
->where
);
10327 else if (rc
== ARITH_NAN
)
10328 gfc_error ("Arithmetic NaN of bit-wise transferred BOZ at %L"
10329 ". This check can be disabled with the option "
10330 "%<-fno-range-check%>", &rhs
->where
);
10335 if (lhs
->ts
.type
== BT_CHARACTER
10336 && warn_character_truncation
)
10338 HOST_WIDE_INT llen
= 0, rlen
= 0;
10339 if (lhs
->ts
.u
.cl
!= NULL
10340 && lhs
->ts
.u
.cl
->length
!= NULL
10341 && lhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10342 llen
= gfc_mpz_get_hwi (lhs
->ts
.u
.cl
->length
->value
.integer
);
10344 if (rhs
->expr_type
== EXPR_CONSTANT
)
10345 rlen
= rhs
->value
.character
.length
;
10347 else if (rhs
->ts
.u
.cl
!= NULL
10348 && rhs
->ts
.u
.cl
->length
!= NULL
10349 && rhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10350 rlen
= gfc_mpz_get_hwi (rhs
->ts
.u
.cl
->length
->value
.integer
);
10352 if (rlen
&& llen
&& rlen
> llen
)
10353 gfc_warning_now (OPT_Wcharacter_truncation
,
10354 "CHARACTER expression will be truncated "
10355 "in assignment (%ld/%ld) at %L",
10356 (long) llen
, (long) rlen
, &code
->loc
);
10359 /* Ensure that a vector index expression for the lvalue is evaluated
10360 to a temporary if the lvalue symbol is referenced in it. */
10363 for (ref
= lhs
->ref
; ref
; ref
= ref
->next
)
10364 if (ref
->type
== REF_ARRAY
)
10366 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
10367 if (ref
->u
.ar
.dimen_type
[n
] == DIMEN_VECTOR
10368 && gfc_find_sym_in_expr (lhs
->symtree
->n
.sym
,
10369 ref
->u
.ar
.start
[n
]))
10371 = gfc_get_parentheses (ref
->u
.ar
.start
[n
]);
10375 if (gfc_pure (NULL
))
10377 if (lhs
->ts
.type
== BT_DERIVED
10378 && lhs
->expr_type
== EXPR_VARIABLE
10379 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10380 && rhs
->expr_type
== EXPR_VARIABLE
10381 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10382 || gfc_is_coindexed (rhs
)))
10384 /* F2008, C1283. */
10385 if (gfc_is_coindexed (rhs
))
10386 gfc_error ("Coindexed expression at %L is assigned to "
10387 "a derived type variable with a POINTER "
10388 "component in a PURE procedure",
10391 gfc_error ("The impure variable at %L is assigned to "
10392 "a derived type variable with a POINTER "
10393 "component in a PURE procedure (12.6)",
10398 /* Fortran 2008, C1283. */
10399 if (gfc_is_coindexed (lhs
))
10401 gfc_error ("Assignment to coindexed variable at %L in a PURE "
10402 "procedure", &rhs
->where
);
10407 if (gfc_implicit_pure (NULL
))
10409 if (lhs
->expr_type
== EXPR_VARIABLE
10410 && lhs
->symtree
->n
.sym
!= gfc_current_ns
->proc_name
10411 && lhs
->symtree
->n
.sym
->ns
!= gfc_current_ns
)
10412 gfc_unset_implicit_pure (NULL
);
10414 if (lhs
->ts
.type
== BT_DERIVED
10415 && lhs
->expr_type
== EXPR_VARIABLE
10416 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10417 && rhs
->expr_type
== EXPR_VARIABLE
10418 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10419 || gfc_is_coindexed (rhs
)))
10420 gfc_unset_implicit_pure (NULL
);
10422 /* Fortran 2008, C1283. */
10423 if (gfc_is_coindexed (lhs
))
10424 gfc_unset_implicit_pure (NULL
);
10427 /* F2008, 7.2.1.2. */
10428 attr
= gfc_expr_attr (lhs
);
10429 if (lhs
->ts
.type
== BT_CLASS
&& attr
.allocatable
)
10431 if (attr
.codimension
)
10433 gfc_error ("Assignment to polymorphic coarray at %L is not "
10434 "permitted", &lhs
->where
);
10437 if (!gfc_notify_std (GFC_STD_F2008
, "Assignment to an allocatable "
10438 "polymorphic variable at %L", &lhs
->where
))
10440 if (!flag_realloc_lhs
)
10442 gfc_error ("Assignment to an allocatable polymorphic variable at %L "
10443 "requires %<-frealloc-lhs%>", &lhs
->where
);
10447 else if (lhs
->ts
.type
== BT_CLASS
)
10449 gfc_error ("Nonallocatable variable must not be polymorphic in intrinsic "
10450 "assignment at %L - check that there is a matching specific "
10451 "subroutine for '=' operator", &lhs
->where
);
10455 bool lhs_coindexed
= gfc_is_coindexed (lhs
);
10457 /* F2008, Section 7.2.1.2. */
10458 if (lhs_coindexed
&& gfc_has_ultimate_allocatable (lhs
))
10460 gfc_error ("Coindexed variable must not have an allocatable ultimate "
10461 "component in assignment at %L", &lhs
->where
);
10465 /* Assign the 'data' of a class object to a derived type. */
10466 if (lhs
->ts
.type
== BT_DERIVED
10467 && rhs
->ts
.type
== BT_CLASS
10468 && rhs
->expr_type
!= EXPR_ARRAY
)
10469 gfc_add_data_component (rhs
);
10471 /* Make sure there is a vtable and, in particular, a _copy for the
10473 if (UNLIMITED_POLY (lhs
) && lhs
->rank
&& rhs
->ts
.type
!= BT_CLASS
)
10474 gfc_find_vtab (&rhs
->ts
);
10476 bool caf_convert_to_send
= flag_coarray
== GFC_FCOARRAY_LIB
10478 || (code
->expr2
->expr_type
== EXPR_FUNCTION
10479 && code
->expr2
->value
.function
.isym
10480 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
10481 && (code
->expr1
->rank
== 0 || code
->expr2
->rank
!= 0)
10482 && !gfc_expr_attr (rhs
).allocatable
10483 && !gfc_has_vector_subscript (rhs
)));
10485 gfc_check_assign (lhs
, rhs
, 1, !caf_convert_to_send
);
10487 /* Insert a GFC_ISYM_CAF_SEND intrinsic, when the LHS is a coindexed variable.
10488 Additionally, insert this code when the RHS is a CAF as we then use the
10489 GFC_ISYM_CAF_SEND intrinsic just to avoid a temporary; but do not do so if
10490 the LHS is (re)allocatable or has a vector subscript. If the LHS is a
10491 noncoindexed array and the RHS is a coindexed scalar, use the normal code
10493 if (caf_convert_to_send
)
10495 if (code
->expr2
->expr_type
== EXPR_FUNCTION
10496 && code
->expr2
->value
.function
.isym
10497 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
10498 remove_caf_get_intrinsic (code
->expr2
);
10499 code
->op
= EXEC_CALL
;
10500 gfc_get_sym_tree (GFC_PREFIX ("caf_send"), ns
, &code
->symtree
, true);
10501 code
->resolved_sym
= code
->symtree
->n
.sym
;
10502 code
->resolved_sym
->attr
.flavor
= FL_PROCEDURE
;
10503 code
->resolved_sym
->attr
.intrinsic
= 1;
10504 code
->resolved_sym
->attr
.subroutine
= 1;
10505 code
->resolved_isym
= gfc_intrinsic_subroutine_by_id (GFC_ISYM_CAF_SEND
);
10506 gfc_commit_symbol (code
->resolved_sym
);
10507 code
->ext
.actual
= gfc_get_actual_arglist ();
10508 code
->ext
.actual
->expr
= lhs
;
10509 code
->ext
.actual
->next
= gfc_get_actual_arglist ();
10510 code
->ext
.actual
->next
->expr
= rhs
;
10511 code
->expr1
= NULL
;
10512 code
->expr2
= NULL
;
10519 /* Add a component reference onto an expression. */
10522 add_comp_ref (gfc_expr
*e
, gfc_component
*c
)
10527 ref
= &((*ref
)->next
);
10528 *ref
= gfc_get_ref ();
10529 (*ref
)->type
= REF_COMPONENT
;
10530 (*ref
)->u
.c
.sym
= e
->ts
.u
.derived
;
10531 (*ref
)->u
.c
.component
= c
;
10534 /* Add a full array ref, as necessary. */
10537 gfc_add_full_array_ref (e
, c
->as
);
10538 e
->rank
= c
->as
->rank
;
10543 /* Build an assignment. Keep the argument 'op' for future use, so that
10544 pointer assignments can be made. */
10547 build_assignment (gfc_exec_op op
, gfc_expr
*expr1
, gfc_expr
*expr2
,
10548 gfc_component
*comp1
, gfc_component
*comp2
, locus loc
)
10550 gfc_code
*this_code
;
10552 this_code
= gfc_get_code (op
);
10553 this_code
->next
= NULL
;
10554 this_code
->expr1
= gfc_copy_expr (expr1
);
10555 this_code
->expr2
= gfc_copy_expr (expr2
);
10556 this_code
->loc
= loc
;
10557 if (comp1
&& comp2
)
10559 add_comp_ref (this_code
->expr1
, comp1
);
10560 add_comp_ref (this_code
->expr2
, comp2
);
10567 /* Makes a temporary variable expression based on the characteristics of
10568 a given variable expression. */
10571 get_temp_from_expr (gfc_expr
*e
, gfc_namespace
*ns
)
10573 static int serial
= 0;
10574 char name
[GFC_MAX_SYMBOL_LEN
];
10576 gfc_array_spec
*as
;
10577 gfc_array_ref
*aref
;
10580 sprintf (name
, GFC_PREFIX("DA%d"), serial
++);
10581 gfc_get_sym_tree (name
, ns
, &tmp
, false);
10582 gfc_add_type (tmp
->n
.sym
, &e
->ts
, NULL
);
10588 /* Obtain the arrayspec for the temporary. */
10589 if (e
->rank
&& e
->expr_type
!= EXPR_ARRAY
10590 && e
->expr_type
!= EXPR_FUNCTION
10591 && e
->expr_type
!= EXPR_OP
)
10593 aref
= gfc_find_array_ref (e
);
10594 if (e
->expr_type
== EXPR_VARIABLE
10595 && e
->symtree
->n
.sym
->as
== aref
->as
)
10599 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
10600 if (ref
->type
== REF_COMPONENT
10601 && ref
->u
.c
.component
->as
== aref
->as
)
10609 /* Add the attributes and the arrayspec to the temporary. */
10610 tmp
->n
.sym
->attr
= gfc_expr_attr (e
);
10611 tmp
->n
.sym
->attr
.function
= 0;
10612 tmp
->n
.sym
->attr
.result
= 0;
10613 tmp
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
10614 tmp
->n
.sym
->attr
.dummy
= 0;
10615 tmp
->n
.sym
->attr
.intent
= INTENT_UNKNOWN
;
10619 tmp
->n
.sym
->as
= gfc_copy_array_spec (as
);
10622 if (as
->type
== AS_DEFERRED
)
10623 tmp
->n
.sym
->attr
.allocatable
= 1;
10625 else if (e
->rank
&& (e
->expr_type
== EXPR_ARRAY
10626 || e
->expr_type
== EXPR_FUNCTION
10627 || e
->expr_type
== EXPR_OP
))
10629 tmp
->n
.sym
->as
= gfc_get_array_spec ();
10630 tmp
->n
.sym
->as
->type
= AS_DEFERRED
;
10631 tmp
->n
.sym
->as
->rank
= e
->rank
;
10632 tmp
->n
.sym
->attr
.allocatable
= 1;
10633 tmp
->n
.sym
->attr
.dimension
= 1;
10636 tmp
->n
.sym
->attr
.dimension
= 0;
10638 gfc_set_sym_referenced (tmp
->n
.sym
);
10639 gfc_commit_symbol (tmp
->n
.sym
);
10640 e
= gfc_lval_expr_from_sym (tmp
->n
.sym
);
10642 /* Should the lhs be a section, use its array ref for the
10643 temporary expression. */
10644 if (aref
&& aref
->type
!= AR_FULL
)
10646 gfc_free_ref_list (e
->ref
);
10647 e
->ref
= gfc_copy_ref (ref
);
10653 /* Add one line of code to the code chain, making sure that 'head' and
10654 'tail' are appropriately updated. */
10657 add_code_to_chain (gfc_code
**this_code
, gfc_code
**head
, gfc_code
**tail
)
10659 gcc_assert (this_code
);
10661 *head
= *tail
= *this_code
;
10663 *tail
= gfc_append_code (*tail
, *this_code
);
10668 /* Counts the potential number of part array references that would
10669 result from resolution of typebound defined assignments. */
10672 nonscalar_typebound_assign (gfc_symbol
*derived
, int depth
)
10675 int c_depth
= 0, t_depth
;
10677 for (c
= derived
->components
; c
; c
= c
->next
)
10679 if ((!gfc_bt_struct (c
->ts
.type
)
10681 || c
->attr
.allocatable
10682 || c
->attr
.proc_pointer_comp
10683 || c
->attr
.class_pointer
10684 || c
->attr
.proc_pointer
)
10685 && !c
->attr
.defined_assign_comp
)
10688 if (c
->as
&& c_depth
== 0)
10691 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
10692 t_depth
= nonscalar_typebound_assign (c
->ts
.u
.derived
,
10697 c_depth
= t_depth
> c_depth
? t_depth
: c_depth
;
10699 return depth
+ c_depth
;
10703 /* Implement 7.2.1.3 of the F08 standard:
10704 "An intrinsic assignment where the variable is of derived type is
10705 performed as if each component of the variable were assigned from the
10706 corresponding component of expr using pointer assignment (7.2.2) for
10707 each pointer component, defined assignment for each nonpointer
10708 nonallocatable component of a type that has a type-bound defined
10709 assignment consistent with the component, intrinsic assignment for
10710 each other nonpointer nonallocatable component, ..."
10712 The pointer assignments are taken care of by the intrinsic
10713 assignment of the structure itself. This function recursively adds
10714 defined assignments where required. The recursion is accomplished
10715 by calling gfc_resolve_code.
10717 When the lhs in a defined assignment has intent INOUT, we need a
10718 temporary for the lhs. In pseudo-code:
10720 ! Only call function lhs once.
10721 if (lhs is not a constant or an variable)
10724 ! Do the intrinsic assignment
10726 ! Now do the defined assignments
10727 do over components with typebound defined assignment [%cmp]
10728 #if one component's assignment procedure is INOUT
10730 #if expr2 non-variable
10736 t1%cmp {defined=} expr2%cmp
10742 expr1%cmp {defined=} expr2%cmp
10746 /* The temporary assignments have to be put on top of the additional
10747 code to avoid the result being changed by the intrinsic assignment.
10749 static int component_assignment_level
= 0;
10750 static gfc_code
*tmp_head
= NULL
, *tmp_tail
= NULL
;
10753 generate_component_assignments (gfc_code
**code
, gfc_namespace
*ns
)
10755 gfc_component
*comp1
, *comp2
;
10756 gfc_code
*this_code
= NULL
, *head
= NULL
, *tail
= NULL
;
10758 int error_count
, depth
;
10760 gfc_get_errors (NULL
, &error_count
);
10762 /* Filter out continuing processing after an error. */
10764 || (*code
)->expr1
->ts
.type
!= BT_DERIVED
10765 || (*code
)->expr2
->ts
.type
!= BT_DERIVED
)
10768 /* TODO: Handle more than one part array reference in assignments. */
10769 depth
= nonscalar_typebound_assign ((*code
)->expr1
->ts
.u
.derived
,
10770 (*code
)->expr1
->rank
? 1 : 0);
10773 gfc_warning (0, "TODO: type-bound defined assignment(s) at %L not "
10774 "done because multiple part array references would "
10775 "occur in intermediate expressions.", &(*code
)->loc
);
10779 component_assignment_level
++;
10781 /* Create a temporary so that functions get called only once. */
10782 if ((*code
)->expr2
->expr_type
!= EXPR_VARIABLE
10783 && (*code
)->expr2
->expr_type
!= EXPR_CONSTANT
)
10785 gfc_expr
*tmp_expr
;
10787 /* Assign the rhs to the temporary. */
10788 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
10789 this_code
= build_assignment (EXEC_ASSIGN
,
10790 tmp_expr
, (*code
)->expr2
,
10791 NULL
, NULL
, (*code
)->loc
);
10792 /* Add the code and substitute the rhs expression. */
10793 add_code_to_chain (&this_code
, &tmp_head
, &tmp_tail
);
10794 gfc_free_expr ((*code
)->expr2
);
10795 (*code
)->expr2
= tmp_expr
;
10798 /* Do the intrinsic assignment. This is not needed if the lhs is one
10799 of the temporaries generated here, since the intrinsic assignment
10800 to the final result already does this. */
10801 if ((*code
)->expr1
->symtree
->n
.sym
->name
[2] != '@')
10803 this_code
= build_assignment (EXEC_ASSIGN
,
10804 (*code
)->expr1
, (*code
)->expr2
,
10805 NULL
, NULL
, (*code
)->loc
);
10806 add_code_to_chain (&this_code
, &head
, &tail
);
10809 comp1
= (*code
)->expr1
->ts
.u
.derived
->components
;
10810 comp2
= (*code
)->expr2
->ts
.u
.derived
->components
;
10813 for (; comp1
; comp1
= comp1
->next
, comp2
= comp2
->next
)
10815 bool inout
= false;
10817 /* The intrinsic assignment does the right thing for pointers
10818 of all kinds and allocatable components. */
10819 if (!gfc_bt_struct (comp1
->ts
.type
)
10820 || comp1
->attr
.pointer
10821 || comp1
->attr
.allocatable
10822 || comp1
->attr
.proc_pointer_comp
10823 || comp1
->attr
.class_pointer
10824 || comp1
->attr
.proc_pointer
)
10827 /* Make an assigment for this component. */
10828 this_code
= build_assignment (EXEC_ASSIGN
,
10829 (*code
)->expr1
, (*code
)->expr2
,
10830 comp1
, comp2
, (*code
)->loc
);
10832 /* Convert the assignment if there is a defined assignment for
10833 this type. Otherwise, using the call from gfc_resolve_code,
10834 recurse into its components. */
10835 gfc_resolve_code (this_code
, ns
);
10837 if (this_code
->op
== EXEC_ASSIGN_CALL
)
10839 gfc_formal_arglist
*dummy_args
;
10841 /* Check that there is a typebound defined assignment. If not,
10842 then this must be a module defined assignment. We cannot
10843 use the defined_assign_comp attribute here because it must
10844 be this derived type that has the defined assignment and not
10846 if (!(comp1
->ts
.u
.derived
->f2k_derived
10847 && comp1
->ts
.u
.derived
->f2k_derived
10848 ->tb_op
[INTRINSIC_ASSIGN
]))
10850 gfc_free_statements (this_code
);
10855 /* If the first argument of the subroutine has intent INOUT
10856 a temporary must be generated and used instead. */
10857 rsym
= this_code
->resolved_sym
;
10858 dummy_args
= gfc_sym_get_dummy_args (rsym
);
10860 && dummy_args
->sym
->attr
.intent
== INTENT_INOUT
)
10862 gfc_code
*temp_code
;
10865 /* Build the temporary required for the assignment and put
10866 it at the head of the generated code. */
10869 t1
= get_temp_from_expr ((*code
)->expr1
, ns
);
10870 temp_code
= build_assignment (EXEC_ASSIGN
,
10871 t1
, (*code
)->expr1
,
10872 NULL
, NULL
, (*code
)->loc
);
10874 /* For allocatable LHS, check whether it is allocated. Note
10875 that allocatable components with defined assignment are
10876 not yet support. See PR 57696. */
10877 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
)
10881 gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
10882 block
= gfc_get_code (EXEC_IF
);
10883 block
->block
= gfc_get_code (EXEC_IF
);
10884 block
->block
->expr1
10885 = gfc_build_intrinsic_call (ns
,
10886 GFC_ISYM_ALLOCATED
, "allocated",
10887 (*code
)->loc
, 1, e
);
10888 block
->block
->next
= temp_code
;
10891 add_code_to_chain (&temp_code
, &tmp_head
, &tmp_tail
);
10894 /* Replace the first actual arg with the component of the
10896 gfc_free_expr (this_code
->ext
.actual
->expr
);
10897 this_code
->ext
.actual
->expr
= gfc_copy_expr (t1
);
10898 add_comp_ref (this_code
->ext
.actual
->expr
, comp1
);
10900 /* If the LHS variable is allocatable and wasn't allocated and
10901 the temporary is allocatable, pointer assign the address of
10902 the freshly allocated LHS to the temporary. */
10903 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
10904 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
10909 cond
= gfc_get_expr ();
10910 cond
->ts
.type
= BT_LOGICAL
;
10911 cond
->ts
.kind
= gfc_default_logical_kind
;
10912 cond
->expr_type
= EXPR_OP
;
10913 cond
->where
= (*code
)->loc
;
10914 cond
->value
.op
.op
= INTRINSIC_NOT
;
10915 cond
->value
.op
.op1
= gfc_build_intrinsic_call (ns
,
10916 GFC_ISYM_ALLOCATED
, "allocated",
10917 (*code
)->loc
, 1, gfc_copy_expr (t1
));
10918 block
= gfc_get_code (EXEC_IF
);
10919 block
->block
= gfc_get_code (EXEC_IF
);
10920 block
->block
->expr1
= cond
;
10921 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
10922 t1
, (*code
)->expr1
,
10923 NULL
, NULL
, (*code
)->loc
);
10924 add_code_to_chain (&block
, &head
, &tail
);
10928 else if (this_code
->op
== EXEC_ASSIGN
&& !this_code
->next
)
10930 /* Don't add intrinsic assignments since they are already
10931 effected by the intrinsic assignment of the structure. */
10932 gfc_free_statements (this_code
);
10937 add_code_to_chain (&this_code
, &head
, &tail
);
10941 /* Transfer the value to the final result. */
10942 this_code
= build_assignment (EXEC_ASSIGN
,
10943 (*code
)->expr1
, t1
,
10944 comp1
, comp2
, (*code
)->loc
);
10945 add_code_to_chain (&this_code
, &head
, &tail
);
10949 /* Put the temporary assignments at the top of the generated code. */
10950 if (tmp_head
&& component_assignment_level
== 1)
10952 gfc_append_code (tmp_head
, head
);
10954 tmp_head
= tmp_tail
= NULL
;
10957 // If we did a pointer assignment - thus, we need to ensure that the LHS is
10958 // not accidentally deallocated. Hence, nullify t1.
10959 if (t1
&& (*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
10960 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
10966 e
= gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
10967 cond
= gfc_build_intrinsic_call (ns
, GFC_ISYM_ASSOCIATED
, "associated",
10968 (*code
)->loc
, 2, gfc_copy_expr (t1
), e
);
10969 block
= gfc_get_code (EXEC_IF
);
10970 block
->block
= gfc_get_code (EXEC_IF
);
10971 block
->block
->expr1
= cond
;
10972 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
10973 t1
, gfc_get_null_expr (&(*code
)->loc
),
10974 NULL
, NULL
, (*code
)->loc
);
10975 gfc_append_code (tail
, block
);
10979 /* Now attach the remaining code chain to the input code. Step on
10980 to the end of the new code since resolution is complete. */
10981 gcc_assert ((*code
)->op
== EXEC_ASSIGN
);
10982 tail
->next
= (*code
)->next
;
10983 /* Overwrite 'code' because this would place the intrinsic assignment
10984 before the temporary for the lhs is created. */
10985 gfc_free_expr ((*code
)->expr1
);
10986 gfc_free_expr ((*code
)->expr2
);
10992 component_assignment_level
--;
10996 /* F2008: Pointer function assignments are of the form:
10997 ptr_fcn (args) = expr
10998 This function breaks these assignments into two statements:
10999 temporary_pointer => ptr_fcn(args)
11000 temporary_pointer = expr */
11003 resolve_ptr_fcn_assign (gfc_code
**code
, gfc_namespace
*ns
)
11005 gfc_expr
*tmp_ptr_expr
;
11006 gfc_code
*this_code
;
11007 gfc_component
*comp
;
11010 if ((*code
)->expr1
->expr_type
!= EXPR_FUNCTION
)
11013 /* Even if standard does not support this feature, continue to build
11014 the two statements to avoid upsetting frontend_passes.c. */
11015 gfc_notify_std (GFC_STD_F2008
, "Pointer procedure assignment at "
11016 "%L", &(*code
)->loc
);
11018 comp
= gfc_get_proc_ptr_comp ((*code
)->expr1
);
11021 s
= comp
->ts
.interface
;
11023 s
= (*code
)->expr1
->symtree
->n
.sym
;
11025 if (s
== NULL
|| !s
->result
->attr
.pointer
)
11027 gfc_error ("The function result on the lhs of the assignment at "
11028 "%L must have the pointer attribute.",
11029 &(*code
)->expr1
->where
);
11030 (*code
)->op
= EXEC_NOP
;
11034 tmp_ptr_expr
= get_temp_from_expr ((*code
)->expr2
, ns
);
11036 /* get_temp_from_expression is set up for ordinary assignments. To that
11037 end, where array bounds are not known, arrays are made allocatable.
11038 Change the temporary to a pointer here. */
11039 tmp_ptr_expr
->symtree
->n
.sym
->attr
.pointer
= 1;
11040 tmp_ptr_expr
->symtree
->n
.sym
->attr
.allocatable
= 0;
11041 tmp_ptr_expr
->where
= (*code
)->loc
;
11043 this_code
= build_assignment (EXEC_ASSIGN
,
11044 tmp_ptr_expr
, (*code
)->expr2
,
11045 NULL
, NULL
, (*code
)->loc
);
11046 this_code
->next
= (*code
)->next
;
11047 (*code
)->next
= this_code
;
11048 (*code
)->op
= EXEC_POINTER_ASSIGN
;
11049 (*code
)->expr2
= (*code
)->expr1
;
11050 (*code
)->expr1
= tmp_ptr_expr
;
11056 /* Deferred character length assignments from an operator expression
11057 require a temporary because the character length of the lhs can
11058 change in the course of the assignment. */
11061 deferred_op_assign (gfc_code
**code
, gfc_namespace
*ns
)
11063 gfc_expr
*tmp_expr
;
11064 gfc_code
*this_code
;
11066 if (!((*code
)->expr1
->ts
.type
== BT_CHARACTER
11067 && (*code
)->expr1
->ts
.deferred
&& (*code
)->expr1
->rank
11068 && (*code
)->expr2
->expr_type
== EXPR_OP
))
11071 if (!gfc_check_dependency ((*code
)->expr1
, (*code
)->expr2
, 1))
11074 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11075 tmp_expr
->where
= (*code
)->loc
;
11077 /* A new charlen is required to ensure that the variable string
11078 length is different to that of the original lhs. */
11079 tmp_expr
->ts
.u
.cl
= gfc_get_charlen();
11080 tmp_expr
->symtree
->n
.sym
->ts
.u
.cl
= tmp_expr
->ts
.u
.cl
;
11081 tmp_expr
->ts
.u
.cl
->next
= (*code
)->expr2
->ts
.u
.cl
->next
;
11082 (*code
)->expr2
->ts
.u
.cl
->next
= tmp_expr
->ts
.u
.cl
;
11084 tmp_expr
->symtree
->n
.sym
->ts
.deferred
= 1;
11086 this_code
= build_assignment (EXEC_ASSIGN
,
11088 gfc_copy_expr (tmp_expr
),
11089 NULL
, NULL
, (*code
)->loc
);
11091 (*code
)->expr1
= tmp_expr
;
11093 this_code
->next
= (*code
)->next
;
11094 (*code
)->next
= this_code
;
11100 /* Given a block of code, recursively resolve everything pointed to by this
11104 gfc_resolve_code (gfc_code
*code
, gfc_namespace
*ns
)
11106 int omp_workshare_save
;
11107 int forall_save
, do_concurrent_save
;
11111 frame
.prev
= cs_base
;
11115 find_reachable_labels (code
);
11117 for (; code
; code
= code
->next
)
11119 frame
.current
= code
;
11120 forall_save
= forall_flag
;
11121 do_concurrent_save
= gfc_do_concurrent_flag
;
11123 if (code
->op
== EXEC_FORALL
)
11126 gfc_resolve_forall (code
, ns
, forall_save
);
11129 else if (code
->block
)
11131 omp_workshare_save
= -1;
11134 case EXEC_OACC_PARALLEL_LOOP
:
11135 case EXEC_OACC_PARALLEL
:
11136 case EXEC_OACC_KERNELS_LOOP
:
11137 case EXEC_OACC_KERNELS
:
11138 case EXEC_OACC_DATA
:
11139 case EXEC_OACC_HOST_DATA
:
11140 case EXEC_OACC_LOOP
:
11141 gfc_resolve_oacc_blocks (code
, ns
);
11143 case EXEC_OMP_PARALLEL_WORKSHARE
:
11144 omp_workshare_save
= omp_workshare_flag
;
11145 omp_workshare_flag
= 1;
11146 gfc_resolve_omp_parallel_blocks (code
, ns
);
11148 case EXEC_OMP_PARALLEL
:
11149 case EXEC_OMP_PARALLEL_DO
:
11150 case EXEC_OMP_PARALLEL_DO_SIMD
:
11151 case EXEC_OMP_PARALLEL_SECTIONS
:
11152 case EXEC_OMP_TARGET_PARALLEL
:
11153 case EXEC_OMP_TARGET_PARALLEL_DO
:
11154 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11155 case EXEC_OMP_TARGET_TEAMS
:
11156 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11157 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11158 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11159 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11160 case EXEC_OMP_TASK
:
11161 case EXEC_OMP_TASKLOOP
:
11162 case EXEC_OMP_TASKLOOP_SIMD
:
11163 case EXEC_OMP_TEAMS
:
11164 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11165 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11166 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11167 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11168 omp_workshare_save
= omp_workshare_flag
;
11169 omp_workshare_flag
= 0;
11170 gfc_resolve_omp_parallel_blocks (code
, ns
);
11172 case EXEC_OMP_DISTRIBUTE
:
11173 case EXEC_OMP_DISTRIBUTE_SIMD
:
11175 case EXEC_OMP_DO_SIMD
:
11176 case EXEC_OMP_SIMD
:
11177 case EXEC_OMP_TARGET_SIMD
:
11178 gfc_resolve_omp_do_blocks (code
, ns
);
11180 case EXEC_SELECT_TYPE
:
11181 /* Blocks are handled in resolve_select_type because we have
11182 to transform the SELECT TYPE into ASSOCIATE first. */
11184 case EXEC_DO_CONCURRENT
:
11185 gfc_do_concurrent_flag
= 1;
11186 gfc_resolve_blocks (code
->block
, ns
);
11187 gfc_do_concurrent_flag
= 2;
11189 case EXEC_OMP_WORKSHARE
:
11190 omp_workshare_save
= omp_workshare_flag
;
11191 omp_workshare_flag
= 1;
11194 gfc_resolve_blocks (code
->block
, ns
);
11198 if (omp_workshare_save
!= -1)
11199 omp_workshare_flag
= omp_workshare_save
;
11203 if (code
->op
!= EXEC_COMPCALL
&& code
->op
!= EXEC_CALL_PPC
)
11204 t
= gfc_resolve_expr (code
->expr1
);
11205 forall_flag
= forall_save
;
11206 gfc_do_concurrent_flag
= do_concurrent_save
;
11208 if (!gfc_resolve_expr (code
->expr2
))
11211 if (code
->op
== EXEC_ALLOCATE
11212 && !gfc_resolve_expr (code
->expr3
))
11218 case EXEC_END_BLOCK
:
11219 case EXEC_END_NESTED_BLOCK
:
11223 case EXEC_ERROR_STOP
:
11225 case EXEC_CONTINUE
:
11227 case EXEC_ASSIGN_CALL
:
11230 case EXEC_CRITICAL
:
11231 resolve_critical (code
);
11234 case EXEC_SYNC_ALL
:
11235 case EXEC_SYNC_IMAGES
:
11236 case EXEC_SYNC_MEMORY
:
11237 resolve_sync (code
);
11242 case EXEC_EVENT_POST
:
11243 case EXEC_EVENT_WAIT
:
11244 resolve_lock_unlock_event (code
);
11247 case EXEC_FAIL_IMAGE
:
11248 case EXEC_FORM_TEAM
:
11249 case EXEC_CHANGE_TEAM
:
11250 case EXEC_END_TEAM
:
11251 case EXEC_SYNC_TEAM
:
11255 /* Keep track of which entry we are up to. */
11256 current_entry_id
= code
->ext
.entry
->id
;
11260 resolve_where (code
, NULL
);
11264 if (code
->expr1
!= NULL
)
11266 if (code
->expr1
->ts
.type
!= BT_INTEGER
)
11267 gfc_error ("ASSIGNED GOTO statement at %L requires an "
11268 "INTEGER variable", &code
->expr1
->where
);
11269 else if (code
->expr1
->symtree
->n
.sym
->attr
.assign
!= 1)
11270 gfc_error ("Variable %qs has not been assigned a target "
11271 "label at %L", code
->expr1
->symtree
->n
.sym
->name
,
11272 &code
->expr1
->where
);
11275 resolve_branch (code
->label1
, code
);
11279 if (code
->expr1
!= NULL
11280 && (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
))
11281 gfc_error ("Alternate RETURN statement at %L requires a SCALAR-"
11282 "INTEGER return specifier", &code
->expr1
->where
);
11285 case EXEC_INIT_ASSIGN
:
11286 case EXEC_END_PROCEDURE
:
11293 /* Remove a GFC_ISYM_CAF_GET inserted for a coindexed variable on
11295 if (code
->expr1
->expr_type
== EXPR_FUNCTION
11296 && code
->expr1
->value
.function
.isym
11297 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
11298 remove_caf_get_intrinsic (code
->expr1
);
11300 /* If this is a pointer function in an lvalue variable context,
11301 the new code will have to be resolved afresh. This is also the
11302 case with an error, where the code is transformed into NOP to
11303 prevent ICEs downstream. */
11304 if (resolve_ptr_fcn_assign (&code
, ns
)
11305 || code
->op
== EXEC_NOP
)
11308 if (!gfc_check_vardef_context (code
->expr1
, false, false, false,
11312 if (resolve_ordinary_assign (code
, ns
))
11314 if (code
->op
== EXEC_COMPCALL
)
11320 /* Check for dependencies in deferred character length array
11321 assignments and generate a temporary, if necessary. */
11322 if (code
->op
== EXEC_ASSIGN
&& deferred_op_assign (&code
, ns
))
11325 /* F03 7.4.1.3 for non-allocatable, non-pointer components. */
11326 if (code
->op
!= EXEC_CALL
&& code
->expr1
->ts
.type
== BT_DERIVED
11327 && code
->expr1
->ts
.u
.derived
11328 && code
->expr1
->ts
.u
.derived
->attr
.defined_assign_comp
)
11329 generate_component_assignments (&code
, ns
);
11333 case EXEC_LABEL_ASSIGN
:
11334 if (code
->label1
->defined
== ST_LABEL_UNKNOWN
)
11335 gfc_error ("Label %d referenced at %L is never defined",
11336 code
->label1
->value
, &code
->label1
->where
);
11338 && (code
->expr1
->expr_type
!= EXPR_VARIABLE
11339 || code
->expr1
->symtree
->n
.sym
->ts
.type
!= BT_INTEGER
11340 || code
->expr1
->symtree
->n
.sym
->ts
.kind
11341 != gfc_default_integer_kind
11342 || code
->expr1
->symtree
->n
.sym
->as
!= NULL
))
11343 gfc_error ("ASSIGN statement at %L requires a scalar "
11344 "default INTEGER variable", &code
->expr1
->where
);
11347 case EXEC_POINTER_ASSIGN
:
11354 /* This is both a variable definition and pointer assignment
11355 context, so check both of them. For rank remapping, a final
11356 array ref may be present on the LHS and fool gfc_expr_attr
11357 used in gfc_check_vardef_context. Remove it. */
11358 e
= remove_last_array_ref (code
->expr1
);
11359 t
= gfc_check_vardef_context (e
, true, false, false,
11360 _("pointer assignment"));
11362 t
= gfc_check_vardef_context (e
, false, false, false,
11363 _("pointer assignment"));
11368 gfc_check_pointer_assign (code
->expr1
, code
->expr2
);
11370 /* Assigning a class object always is a regular assign. */
11371 if (code
->expr2
->ts
.type
== BT_CLASS
11372 && code
->expr1
->ts
.type
== BT_CLASS
11373 && !CLASS_DATA (code
->expr2
)->attr
.dimension
11374 && !(gfc_expr_attr (code
->expr1
).proc_pointer
11375 && code
->expr2
->expr_type
== EXPR_VARIABLE
11376 && code
->expr2
->symtree
->n
.sym
->attr
.flavor
11378 code
->op
= EXEC_ASSIGN
;
11382 case EXEC_ARITHMETIC_IF
:
11384 gfc_expr
*e
= code
->expr1
;
11386 gfc_resolve_expr (e
);
11387 if (e
->expr_type
== EXPR_NULL
)
11388 gfc_error ("Invalid NULL at %L", &e
->where
);
11390 if (t
&& (e
->rank
> 0
11391 || !(e
->ts
.type
== BT_REAL
|| e
->ts
.type
== BT_INTEGER
)))
11392 gfc_error ("Arithmetic IF statement at %L requires a scalar "
11393 "REAL or INTEGER expression", &e
->where
);
11395 resolve_branch (code
->label1
, code
);
11396 resolve_branch (code
->label2
, code
);
11397 resolve_branch (code
->label3
, code
);
11402 if (t
&& code
->expr1
!= NULL
11403 && (code
->expr1
->ts
.type
!= BT_LOGICAL
11404 || code
->expr1
->rank
!= 0))
11405 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
11406 &code
->expr1
->where
);
11411 resolve_call (code
);
11414 case EXEC_COMPCALL
:
11416 resolve_typebound_subroutine (code
);
11419 case EXEC_CALL_PPC
:
11420 resolve_ppc_call (code
);
11424 /* Select is complicated. Also, a SELECT construct could be
11425 a transformed computed GOTO. */
11426 resolve_select (code
, false);
11429 case EXEC_SELECT_TYPE
:
11430 resolve_select_type (code
, ns
);
11434 resolve_block_construct (code
);
11438 if (code
->ext
.iterator
!= NULL
)
11440 gfc_iterator
*iter
= code
->ext
.iterator
;
11441 if (gfc_resolve_iterator (iter
, true, false))
11442 gfc_resolve_do_iterator (code
, iter
->var
->symtree
->n
.sym
,
11447 case EXEC_DO_WHILE
:
11448 if (code
->expr1
== NULL
)
11449 gfc_internal_error ("gfc_resolve_code(): No expression on "
11452 && (code
->expr1
->rank
!= 0
11453 || code
->expr1
->ts
.type
!= BT_LOGICAL
))
11454 gfc_error ("Exit condition of DO WHILE loop at %L must be "
11455 "a scalar LOGICAL expression", &code
->expr1
->where
);
11458 case EXEC_ALLOCATE
:
11460 resolve_allocate_deallocate (code
, "ALLOCATE");
11464 case EXEC_DEALLOCATE
:
11466 resolve_allocate_deallocate (code
, "DEALLOCATE");
11471 if (!gfc_resolve_open (code
->ext
.open
))
11474 resolve_branch (code
->ext
.open
->err
, code
);
11478 if (!gfc_resolve_close (code
->ext
.close
))
11481 resolve_branch (code
->ext
.close
->err
, code
);
11484 case EXEC_BACKSPACE
:
11488 if (!gfc_resolve_filepos (code
->ext
.filepos
))
11491 resolve_branch (code
->ext
.filepos
->err
, code
);
11495 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11498 resolve_branch (code
->ext
.inquire
->err
, code
);
11501 case EXEC_IOLENGTH
:
11502 gcc_assert (code
->ext
.inquire
!= NULL
);
11503 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11506 resolve_branch (code
->ext
.inquire
->err
, code
);
11510 if (!gfc_resolve_wait (code
->ext
.wait
))
11513 resolve_branch (code
->ext
.wait
->err
, code
);
11514 resolve_branch (code
->ext
.wait
->end
, code
);
11515 resolve_branch (code
->ext
.wait
->eor
, code
);
11520 if (!gfc_resolve_dt (code
->ext
.dt
, &code
->loc
))
11523 resolve_branch (code
->ext
.dt
->err
, code
);
11524 resolve_branch (code
->ext
.dt
->end
, code
);
11525 resolve_branch (code
->ext
.dt
->eor
, code
);
11528 case EXEC_TRANSFER
:
11529 resolve_transfer (code
);
11532 case EXEC_DO_CONCURRENT
:
11534 resolve_forall_iterators (code
->ext
.forall_iterator
);
11536 if (code
->expr1
!= NULL
11537 && (code
->expr1
->ts
.type
!= BT_LOGICAL
|| code
->expr1
->rank
))
11538 gfc_error ("FORALL mask clause at %L requires a scalar LOGICAL "
11539 "expression", &code
->expr1
->where
);
11542 case EXEC_OACC_PARALLEL_LOOP
:
11543 case EXEC_OACC_PARALLEL
:
11544 case EXEC_OACC_KERNELS_LOOP
:
11545 case EXEC_OACC_KERNELS
:
11546 case EXEC_OACC_DATA
:
11547 case EXEC_OACC_HOST_DATA
:
11548 case EXEC_OACC_LOOP
:
11549 case EXEC_OACC_UPDATE
:
11550 case EXEC_OACC_WAIT
:
11551 case EXEC_OACC_CACHE
:
11552 case EXEC_OACC_ENTER_DATA
:
11553 case EXEC_OACC_EXIT_DATA
:
11554 case EXEC_OACC_ATOMIC
:
11555 case EXEC_OACC_DECLARE
:
11556 gfc_resolve_oacc_directive (code
, ns
);
11559 case EXEC_OMP_ATOMIC
:
11560 case EXEC_OMP_BARRIER
:
11561 case EXEC_OMP_CANCEL
:
11562 case EXEC_OMP_CANCELLATION_POINT
:
11563 case EXEC_OMP_CRITICAL
:
11564 case EXEC_OMP_FLUSH
:
11565 case EXEC_OMP_DISTRIBUTE
:
11566 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
11567 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
11568 case EXEC_OMP_DISTRIBUTE_SIMD
:
11570 case EXEC_OMP_DO_SIMD
:
11571 case EXEC_OMP_MASTER
:
11572 case EXEC_OMP_ORDERED
:
11573 case EXEC_OMP_SECTIONS
:
11574 case EXEC_OMP_SIMD
:
11575 case EXEC_OMP_SINGLE
:
11576 case EXEC_OMP_TARGET
:
11577 case EXEC_OMP_TARGET_DATA
:
11578 case EXEC_OMP_TARGET_ENTER_DATA
:
11579 case EXEC_OMP_TARGET_EXIT_DATA
:
11580 case EXEC_OMP_TARGET_PARALLEL
:
11581 case EXEC_OMP_TARGET_PARALLEL_DO
:
11582 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11583 case EXEC_OMP_TARGET_SIMD
:
11584 case EXEC_OMP_TARGET_TEAMS
:
11585 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11586 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11587 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11588 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11589 case EXEC_OMP_TARGET_UPDATE
:
11590 case EXEC_OMP_TASK
:
11591 case EXEC_OMP_TASKGROUP
:
11592 case EXEC_OMP_TASKLOOP
:
11593 case EXEC_OMP_TASKLOOP_SIMD
:
11594 case EXEC_OMP_TASKWAIT
:
11595 case EXEC_OMP_TASKYIELD
:
11596 case EXEC_OMP_TEAMS
:
11597 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11598 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11599 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11600 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11601 case EXEC_OMP_WORKSHARE
:
11602 gfc_resolve_omp_directive (code
, ns
);
11605 case EXEC_OMP_PARALLEL
:
11606 case EXEC_OMP_PARALLEL_DO
:
11607 case EXEC_OMP_PARALLEL_DO_SIMD
:
11608 case EXEC_OMP_PARALLEL_SECTIONS
:
11609 case EXEC_OMP_PARALLEL_WORKSHARE
:
11610 omp_workshare_save
= omp_workshare_flag
;
11611 omp_workshare_flag
= 0;
11612 gfc_resolve_omp_directive (code
, ns
);
11613 omp_workshare_flag
= omp_workshare_save
;
11617 gfc_internal_error ("gfc_resolve_code(): Bad statement code");
11621 cs_base
= frame
.prev
;
11625 /* Resolve initial values and make sure they are compatible with
11629 resolve_values (gfc_symbol
*sym
)
11633 if (sym
->value
== NULL
)
11636 if (sym
->value
->expr_type
== EXPR_STRUCTURE
)
11637 t
= resolve_structure_cons (sym
->value
, 1);
11639 t
= gfc_resolve_expr (sym
->value
);
11644 gfc_check_assign_symbol (sym
, NULL
, sym
->value
);
11648 /* Verify any BIND(C) derived types in the namespace so we can report errors
11649 for them once, rather than for each variable declared of that type. */
11652 resolve_bind_c_derived_types (gfc_symbol
*derived_sym
)
11654 if (derived_sym
!= NULL
&& derived_sym
->attr
.flavor
== FL_DERIVED
11655 && derived_sym
->attr
.is_bind_c
== 1)
11656 verify_bind_c_derived_type (derived_sym
);
11662 /* Check the interfaces of DTIO procedures associated with derived
11663 type 'sym'. These procedures can either have typebound bindings or
11664 can appear in DTIO generic interfaces. */
11667 gfc_verify_DTIO_procedures (gfc_symbol
*sym
)
11669 if (!sym
|| sym
->attr
.flavor
!= FL_DERIVED
)
11672 gfc_check_dtio_interfaces (sym
);
11677 /* Verify that any binding labels used in a given namespace do not collide
11678 with the names or binding labels of any global symbols. Multiple INTERFACE
11679 for the same procedure are permitted. */
11682 gfc_verify_binding_labels (gfc_symbol
*sym
)
11685 const char *module
;
11687 if (!sym
|| !sym
->attr
.is_bind_c
|| sym
->attr
.is_iso_c
11688 || sym
->attr
.flavor
== FL_DERIVED
|| !sym
->binding_label
)
11691 gsym
= gfc_find_case_gsymbol (gfc_gsym_root
, sym
->binding_label
);
11694 module
= sym
->module
;
11695 else if (sym
->ns
&& sym
->ns
->proc_name
11696 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
11697 module
= sym
->ns
->proc_name
->name
;
11698 else if (sym
->ns
&& sym
->ns
->parent
11699 && sym
->ns
&& sym
->ns
->parent
->proc_name
11700 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
11701 module
= sym
->ns
->parent
->proc_name
->name
;
11707 && (gsym
->type
== GSYM_FUNCTION
|| gsym
->type
== GSYM_SUBROUTINE
)))
11710 gsym
= gfc_get_gsymbol (sym
->binding_label
);
11711 gsym
->where
= sym
->declared_at
;
11712 gsym
->sym_name
= sym
->name
;
11713 gsym
->binding_label
= sym
->binding_label
;
11714 gsym
->ns
= sym
->ns
;
11715 gsym
->mod_name
= module
;
11716 if (sym
->attr
.function
)
11717 gsym
->type
= GSYM_FUNCTION
;
11718 else if (sym
->attr
.subroutine
)
11719 gsym
->type
= GSYM_SUBROUTINE
;
11720 /* Mark as variable/procedure as defined, unless its an INTERFACE. */
11721 gsym
->defined
= sym
->attr
.if_source
!= IFSRC_IFBODY
;
11725 if (sym
->attr
.flavor
== FL_VARIABLE
&& gsym
->type
!= GSYM_UNKNOWN
)
11727 gfc_error ("Variable %qs with binding label %qs at %L uses the same global "
11728 "identifier as entity at %L", sym
->name
,
11729 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11730 /* Clear the binding label to prevent checking multiple times. */
11731 sym
->binding_label
= NULL
;
11734 else if (sym
->attr
.flavor
== FL_VARIABLE
&& module
11735 && (strcmp (module
, gsym
->mod_name
) != 0
11736 || strcmp (sym
->name
, gsym
->sym_name
) != 0))
11738 /* This can only happen if the variable is defined in a module - if it
11739 isn't the same module, reject it. */
11740 gfc_error ("Variable %qs from module %qs with binding label %qs at %L "
11741 "uses the same global identifier as entity at %L from module %qs",
11742 sym
->name
, module
, sym
->binding_label
,
11743 &sym
->declared_at
, &gsym
->where
, gsym
->mod_name
);
11744 sym
->binding_label
= NULL
;
11746 else if ((sym
->attr
.function
|| sym
->attr
.subroutine
)
11747 && ((gsym
->type
!= GSYM_SUBROUTINE
&& gsym
->type
!= GSYM_FUNCTION
)
11748 || (gsym
->defined
&& sym
->attr
.if_source
!= IFSRC_IFBODY
))
11749 && sym
!= gsym
->ns
->proc_name
11750 && (module
!= gsym
->mod_name
11751 || strcmp (gsym
->sym_name
, sym
->name
) != 0
11752 || (module
&& strcmp (module
, gsym
->mod_name
) != 0)))
11754 /* Print an error if the procedure is defined multiple times; we have to
11755 exclude references to the same procedure via module association or
11756 multiple checks for the same procedure. */
11757 gfc_error ("Procedure %qs with binding label %qs at %L uses the same "
11758 "global identifier as entity at %L", sym
->name
,
11759 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11760 sym
->binding_label
= NULL
;
11765 /* Resolve an index expression. */
11768 resolve_index_expr (gfc_expr
*e
)
11770 if (!gfc_resolve_expr (e
))
11773 if (!gfc_simplify_expr (e
, 0))
11776 if (!gfc_specification_expr (e
))
11783 /* Resolve a charlen structure. */
11786 resolve_charlen (gfc_charlen
*cl
)
11789 bool saved_specification_expr
;
11795 saved_specification_expr
= specification_expr
;
11796 specification_expr
= true;
11798 if (cl
->length_from_typespec
)
11800 if (!gfc_resolve_expr (cl
->length
))
11802 specification_expr
= saved_specification_expr
;
11806 if (!gfc_simplify_expr (cl
->length
, 0))
11808 specification_expr
= saved_specification_expr
;
11812 /* cl->length has been resolved. It should have an integer type. */
11813 if (cl
->length
->ts
.type
!= BT_INTEGER
)
11815 gfc_error ("Scalar INTEGER expression expected at %L",
11816 &cl
->length
->where
);
11822 if (!resolve_index_expr (cl
->length
))
11824 specification_expr
= saved_specification_expr
;
11829 /* F2008, 4.4.3.2: If the character length parameter value evaluates to
11830 a negative value, the length of character entities declared is zero. */
11831 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11832 && mpz_sgn (cl
->length
->value
.integer
) < 0)
11833 gfc_replace_expr (cl
->length
,
11834 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 0));
11836 /* Check that the character length is not too large. */
11837 k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
11838 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11839 && cl
->length
->ts
.type
== BT_INTEGER
11840 && mpz_cmp (cl
->length
->value
.integer
, gfc_integer_kinds
[k
].huge
) > 0)
11842 gfc_error ("String length at %L is too large", &cl
->length
->where
);
11843 specification_expr
= saved_specification_expr
;
11847 specification_expr
= saved_specification_expr
;
11852 /* Test for non-constant shape arrays. */
11855 is_non_constant_shape_array (gfc_symbol
*sym
)
11861 not_constant
= false;
11862 if (sym
->as
!= NULL
)
11864 /* Unfortunately, !gfc_is_compile_time_shape hits a legal case that
11865 has not been simplified; parameter array references. Do the
11866 simplification now. */
11867 for (i
= 0; i
< sym
->as
->rank
+ sym
->as
->corank
; i
++)
11869 e
= sym
->as
->lower
[i
];
11870 if (e
&& (!resolve_index_expr(e
)
11871 || !gfc_is_constant_expr (e
)))
11872 not_constant
= true;
11873 e
= sym
->as
->upper
[i
];
11874 if (e
&& (!resolve_index_expr(e
)
11875 || !gfc_is_constant_expr (e
)))
11876 not_constant
= true;
11879 return not_constant
;
11882 /* Given a symbol and an initialization expression, add code to initialize
11883 the symbol to the function entry. */
11885 build_init_assign (gfc_symbol
*sym
, gfc_expr
*init
)
11889 gfc_namespace
*ns
= sym
->ns
;
11891 /* Search for the function namespace if this is a contained
11892 function without an explicit result. */
11893 if (sym
->attr
.function
&& sym
== sym
->result
11894 && sym
->name
!= sym
->ns
->proc_name
->name
)
11896 ns
= ns
->contained
;
11897 for (;ns
; ns
= ns
->sibling
)
11898 if (strcmp (ns
->proc_name
->name
, sym
->name
) == 0)
11904 gfc_free_expr (init
);
11908 /* Build an l-value expression for the result. */
11909 lval
= gfc_lval_expr_from_sym (sym
);
11911 /* Add the code at scope entry. */
11912 init_st
= gfc_get_code (EXEC_INIT_ASSIGN
);
11913 init_st
->next
= ns
->code
;
11914 ns
->code
= init_st
;
11916 /* Assign the default initializer to the l-value. */
11917 init_st
->loc
= sym
->declared_at
;
11918 init_st
->expr1
= lval
;
11919 init_st
->expr2
= init
;
11923 /* Whether or not we can generate a default initializer for a symbol. */
11926 can_generate_init (gfc_symbol
*sym
)
11928 symbol_attribute
*a
;
11933 /* These symbols should never have a default initialization. */
11938 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
11939 && (CLASS_DATA (sym
)->attr
.class_pointer
11940 || CLASS_DATA (sym
)->attr
.proc_pointer
))
11941 || a
->in_equivalence
11948 || (!a
->referenced
&& !a
->result
)
11949 || (a
->dummy
&& a
->intent
!= INTENT_OUT
)
11950 || (a
->function
&& sym
!= sym
->result
)
11955 /* Assign the default initializer to a derived type variable or result. */
11958 apply_default_init (gfc_symbol
*sym
)
11960 gfc_expr
*init
= NULL
;
11962 if (sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
11965 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
)
11966 init
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
11968 if (init
== NULL
&& sym
->ts
.type
!= BT_CLASS
)
11971 build_init_assign (sym
, init
);
11972 sym
->attr
.referenced
= 1;
11976 /* Build an initializer for a local. Returns null if the symbol should not have
11977 a default initialization. */
11980 build_default_init_expr (gfc_symbol
*sym
)
11982 /* These symbols should never have a default initialization. */
11983 if (sym
->attr
.allocatable
11984 || sym
->attr
.external
11986 || sym
->attr
.pointer
11987 || sym
->attr
.in_equivalence
11988 || sym
->attr
.in_common
11991 || sym
->attr
.cray_pointee
11992 || sym
->attr
.cray_pointer
11996 /* Get the appropriate init expression. */
11997 return gfc_build_default_init_expr (&sym
->ts
, &sym
->declared_at
);
12000 /* Add an initialization expression to a local variable. */
12002 apply_default_init_local (gfc_symbol
*sym
)
12004 gfc_expr
*init
= NULL
;
12006 /* The symbol should be a variable or a function return value. */
12007 if ((sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12008 || (sym
->attr
.function
&& sym
->result
!= sym
))
12011 /* Try to build the initializer expression. If we can't initialize
12012 this symbol, then init will be NULL. */
12013 init
= build_default_init_expr (sym
);
12017 /* For saved variables, we don't want to add an initializer at function
12018 entry, so we just add a static initializer. Note that automatic variables
12019 are stack allocated even with -fno-automatic; we have also to exclude
12020 result variable, which are also nonstatic. */
12021 if (!sym
->attr
.automatic
12022 && (sym
->attr
.save
|| sym
->ns
->save_all
12023 || (flag_max_stack_var_size
== 0 && !sym
->attr
.result
12024 && (sym
->ns
->proc_name
&& !sym
->ns
->proc_name
->attr
.recursive
)
12025 && (!sym
->attr
.dimension
|| !is_non_constant_shape_array (sym
)))))
12027 /* Don't clobber an existing initializer! */
12028 gcc_assert (sym
->value
== NULL
);
12033 build_init_assign (sym
, init
);
12037 /* Resolution of common features of flavors variable and procedure. */
12040 resolve_fl_var_and_proc (gfc_symbol
*sym
, int mp_flag
)
12042 gfc_array_spec
*as
;
12044 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12045 as
= CLASS_DATA (sym
)->as
;
12049 /* Constraints on deferred shape variable. */
12050 if (as
== NULL
|| as
->type
!= AS_DEFERRED
)
12052 bool pointer
, allocatable
, dimension
;
12054 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12056 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
12057 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
12058 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
12062 pointer
= sym
->attr
.pointer
&& !sym
->attr
.select_type_temporary
;
12063 allocatable
= sym
->attr
.allocatable
;
12064 dimension
= sym
->attr
.dimension
;
12069 if (dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12071 gfc_error ("Allocatable array %qs at %L must have a deferred "
12072 "shape or assumed rank", sym
->name
, &sym
->declared_at
);
12075 else if (!gfc_notify_std (GFC_STD_F2003
, "Scalar object "
12076 "%qs at %L may not be ALLOCATABLE",
12077 sym
->name
, &sym
->declared_at
))
12081 if (pointer
&& dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12083 gfc_error ("Array pointer %qs at %L must have a deferred shape or "
12084 "assumed rank", sym
->name
, &sym
->declared_at
);
12090 if (!mp_flag
&& !sym
->attr
.allocatable
&& !sym
->attr
.pointer
12091 && sym
->ts
.type
!= BT_CLASS
&& !sym
->assoc
)
12093 gfc_error ("Array %qs at %L cannot have a deferred shape",
12094 sym
->name
, &sym
->declared_at
);
12099 /* Constraints on polymorphic variables. */
12100 if (sym
->ts
.type
== BT_CLASS
&& !(sym
->result
&& sym
->result
!= sym
))
12103 if (sym
->attr
.class_ok
12104 && !sym
->attr
.select_type_temporary
12105 && !UNLIMITED_POLY (sym
)
12106 && !gfc_type_is_extensible (CLASS_DATA (sym
)->ts
.u
.derived
))
12108 gfc_error ("Type %qs of CLASS variable %qs at %L is not extensible",
12109 CLASS_DATA (sym
)->ts
.u
.derived
->name
, sym
->name
,
12110 &sym
->declared_at
);
12115 /* Assume that use associated symbols were checked in the module ns.
12116 Class-variables that are associate-names are also something special
12117 and excepted from the test. */
12118 if (!sym
->attr
.class_ok
&& !sym
->attr
.use_assoc
&& !sym
->assoc
)
12120 gfc_error ("CLASS variable %qs at %L must be dummy, allocatable "
12121 "or pointer", sym
->name
, &sym
->declared_at
);
12130 /* Additional checks for symbols with flavor variable and derived
12131 type. To be called from resolve_fl_variable. */
12134 resolve_fl_variable_derived (gfc_symbol
*sym
, int no_init_flag
)
12136 gcc_assert (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
);
12138 /* Check to see if a derived type is blocked from being host
12139 associated by the presence of another class I symbol in the same
12140 namespace. 14.6.1.3 of the standard and the discussion on
12141 comp.lang.fortran. */
12142 if (sym
->ns
!= sym
->ts
.u
.derived
->ns
12143 && !sym
->ts
.u
.derived
->attr
.use_assoc
12144 && sym
->ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
12147 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 0, &s
);
12148 if (s
&& s
->attr
.generic
)
12149 s
= gfc_find_dt_in_generic (s
);
12150 if (s
&& !gfc_fl_struct (s
->attr
.flavor
))
12152 gfc_error ("The type %qs cannot be host associated at %L "
12153 "because it is blocked by an incompatible object "
12154 "of the same name declared at %L",
12155 sym
->ts
.u
.derived
->name
, &sym
->declared_at
,
12161 /* 4th constraint in section 11.3: "If an object of a type for which
12162 component-initialization is specified (R429) appears in the
12163 specification-part of a module and does not have the ALLOCATABLE
12164 or POINTER attribute, the object shall have the SAVE attribute."
12166 The check for initializers is performed with
12167 gfc_has_default_initializer because gfc_default_initializer generates
12168 a hidden default for allocatable components. */
12169 if (!(sym
->value
|| no_init_flag
) && sym
->ns
->proc_name
12170 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12171 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
) && !sym
->attr
.save
12172 && !sym
->attr
.pointer
&& !sym
->attr
.allocatable
12173 && gfc_has_default_initializer (sym
->ts
.u
.derived
)
12174 && !gfc_notify_std (GFC_STD_F2008
, "Implied SAVE for module variable "
12175 "%qs at %L, needed due to the default "
12176 "initialization", sym
->name
, &sym
->declared_at
))
12179 /* Assign default initializer. */
12180 if (!(sym
->value
|| sym
->attr
.pointer
|| sym
->attr
.allocatable
)
12181 && (!no_init_flag
|| sym
->attr
.intent
== INTENT_OUT
))
12182 sym
->value
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12188 /* F2008, C402 (R401): A colon shall not be used as a type-param-value
12189 except in the declaration of an entity or component that has the POINTER
12190 or ALLOCATABLE attribute. */
12193 deferred_requirements (gfc_symbol
*sym
)
12195 if (sym
->ts
.deferred
12196 && !(sym
->attr
.pointer
12197 || sym
->attr
.allocatable
12198 || sym
->attr
.associate_var
12199 || sym
->attr
.omp_udr_artificial_var
))
12201 gfc_error ("Entity %qs at %L has a deferred type parameter and "
12202 "requires either the POINTER or ALLOCATABLE attribute",
12203 sym
->name
, &sym
->declared_at
);
12210 /* Resolve symbols with flavor variable. */
12213 resolve_fl_variable (gfc_symbol
*sym
, int mp_flag
)
12215 int no_init_flag
, automatic_flag
;
12217 const char *auto_save_msg
;
12218 bool saved_specification_expr
;
12220 auto_save_msg
= "Automatic object %qs at %L cannot have the "
12223 if (!resolve_fl_var_and_proc (sym
, mp_flag
))
12226 /* Set this flag to check that variables are parameters of all entries.
12227 This check is effected by the call to gfc_resolve_expr through
12228 is_non_constant_shape_array. */
12229 saved_specification_expr
= specification_expr
;
12230 specification_expr
= true;
12232 if (sym
->ns
->proc_name
12233 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12234 || sym
->ns
->proc_name
->attr
.is_main_program
)
12235 && !sym
->attr
.use_assoc
12236 && !sym
->attr
.allocatable
12237 && !sym
->attr
.pointer
12238 && is_non_constant_shape_array (sym
))
12240 /* F08:C541. The shape of an array defined in a main program or module
12241 * needs to be constant. */
12242 gfc_error ("The module or main program array %qs at %L must "
12243 "have constant shape", sym
->name
, &sym
->declared_at
);
12244 specification_expr
= saved_specification_expr
;
12248 /* Constraints on deferred type parameter. */
12249 if (!deferred_requirements (sym
))
12252 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.associate_var
)
12254 /* Make sure that character string variables with assumed length are
12255 dummy arguments. */
12256 e
= sym
->ts
.u
.cl
->length
;
12257 if (e
== NULL
&& !sym
->attr
.dummy
&& !sym
->attr
.result
12258 && !sym
->ts
.deferred
&& !sym
->attr
.select_type_temporary
12259 && !sym
->attr
.omp_udr_artificial_var
)
12261 gfc_error ("Entity with assumed character length at %L must be a "
12262 "dummy argument or a PARAMETER", &sym
->declared_at
);
12263 specification_expr
= saved_specification_expr
;
12267 if (e
&& sym
->attr
.save
== SAVE_EXPLICIT
&& !gfc_is_constant_expr (e
))
12269 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12270 specification_expr
= saved_specification_expr
;
12274 if (!gfc_is_constant_expr (e
)
12275 && !(e
->expr_type
== EXPR_VARIABLE
12276 && e
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
))
12278 if (!sym
->attr
.use_assoc
&& sym
->ns
->proc_name
12279 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12280 || sym
->ns
->proc_name
->attr
.is_main_program
))
12282 gfc_error ("%qs at %L must have constant character length "
12283 "in this context", sym
->name
, &sym
->declared_at
);
12284 specification_expr
= saved_specification_expr
;
12287 if (sym
->attr
.in_common
)
12289 gfc_error ("COMMON variable %qs at %L must have constant "
12290 "character length", sym
->name
, &sym
->declared_at
);
12291 specification_expr
= saved_specification_expr
;
12297 if (sym
->value
== NULL
&& sym
->attr
.referenced
)
12298 apply_default_init_local (sym
); /* Try to apply a default initialization. */
12300 /* Determine if the symbol may not have an initializer. */
12301 no_init_flag
= automatic_flag
= 0;
12302 if (sym
->attr
.allocatable
|| sym
->attr
.external
|| sym
->attr
.dummy
12303 || sym
->attr
.intrinsic
|| sym
->attr
.result
)
12305 else if ((sym
->attr
.dimension
|| sym
->attr
.codimension
) && !sym
->attr
.pointer
12306 && is_non_constant_shape_array (sym
))
12308 no_init_flag
= automatic_flag
= 1;
12310 /* Also, they must not have the SAVE attribute.
12311 SAVE_IMPLICIT is checked below. */
12312 if (sym
->as
&& sym
->attr
.codimension
)
12314 int corank
= sym
->as
->corank
;
12315 sym
->as
->corank
= 0;
12316 no_init_flag
= automatic_flag
= is_non_constant_shape_array (sym
);
12317 sym
->as
->corank
= corank
;
12319 if (automatic_flag
&& sym
->attr
.save
== SAVE_EXPLICIT
)
12321 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12322 specification_expr
= saved_specification_expr
;
12327 /* Ensure that any initializer is simplified. */
12329 gfc_simplify_expr (sym
->value
, 1);
12331 /* Reject illegal initializers. */
12332 if (!sym
->mark
&& sym
->value
)
12334 if (sym
->attr
.allocatable
|| (sym
->ts
.type
== BT_CLASS
12335 && CLASS_DATA (sym
)->attr
.allocatable
))
12336 gfc_error ("Allocatable %qs at %L cannot have an initializer",
12337 sym
->name
, &sym
->declared_at
);
12338 else if (sym
->attr
.external
)
12339 gfc_error ("External %qs at %L cannot have an initializer",
12340 sym
->name
, &sym
->declared_at
);
12341 else if (sym
->attr
.dummy
12342 && !(sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.intent
== INTENT_OUT
))
12343 gfc_error ("Dummy %qs at %L cannot have an initializer",
12344 sym
->name
, &sym
->declared_at
);
12345 else if (sym
->attr
.intrinsic
)
12346 gfc_error ("Intrinsic %qs at %L cannot have an initializer",
12347 sym
->name
, &sym
->declared_at
);
12348 else if (sym
->attr
.result
)
12349 gfc_error ("Function result %qs at %L cannot have an initializer",
12350 sym
->name
, &sym
->declared_at
);
12351 else if (automatic_flag
)
12352 gfc_error ("Automatic array %qs at %L cannot have an initializer",
12353 sym
->name
, &sym
->declared_at
);
12355 goto no_init_error
;
12356 specification_expr
= saved_specification_expr
;
12361 if (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
)
12363 bool res
= resolve_fl_variable_derived (sym
, no_init_flag
);
12364 specification_expr
= saved_specification_expr
;
12368 specification_expr
= saved_specification_expr
;
12373 /* Compare the dummy characteristics of a module procedure interface
12374 declaration with the corresponding declaration in a submodule. */
12375 static gfc_formal_arglist
*new_formal
;
12376 static char errmsg
[200];
12379 compare_fsyms (gfc_symbol
*sym
)
12383 if (sym
== NULL
|| new_formal
== NULL
)
12386 fsym
= new_formal
->sym
;
12391 if (strcmp (sym
->name
, fsym
->name
) == 0)
12393 if (!gfc_check_dummy_characteristics (fsym
, sym
, true, errmsg
, 200))
12394 gfc_error ("%s at %L", errmsg
, &fsym
->declared_at
);
12399 /* Resolve a procedure. */
12402 resolve_fl_procedure (gfc_symbol
*sym
, int mp_flag
)
12404 gfc_formal_arglist
*arg
;
12406 if (sym
->attr
.function
12407 && !resolve_fl_var_and_proc (sym
, mp_flag
))
12410 if (sym
->ts
.type
== BT_CHARACTER
)
12412 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
12414 if (cl
&& cl
->length
&& gfc_is_constant_expr (cl
->length
)
12415 && !resolve_charlen (cl
))
12418 if ((!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
12419 && sym
->attr
.proc
== PROC_ST_FUNCTION
)
12421 gfc_error ("Character-valued statement function %qs at %L must "
12422 "have constant length", sym
->name
, &sym
->declared_at
);
12427 /* Ensure that derived type for are not of a private type. Internal
12428 module procedures are excluded by 2.2.3.3 - i.e., they are not
12429 externally accessible and can access all the objects accessible in
12431 if (!(sym
->ns
->parent
12432 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12433 && gfc_check_symbol_access (sym
))
12435 gfc_interface
*iface
;
12437 for (arg
= gfc_sym_get_dummy_args (sym
); arg
; arg
= arg
->next
)
12440 && arg
->sym
->ts
.type
== BT_DERIVED
12441 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12442 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12443 && !gfc_notify_std (GFC_STD_F2003
, "%qs is of a PRIVATE type "
12444 "and cannot be a dummy argument"
12445 " of %qs, which is PUBLIC at %L",
12446 arg
->sym
->name
, sym
->name
,
12447 &sym
->declared_at
))
12449 /* Stop this message from recurring. */
12450 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12455 /* PUBLIC interfaces may expose PRIVATE procedures that take types
12456 PRIVATE to the containing module. */
12457 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
12459 for (arg
= gfc_sym_get_dummy_args (iface
->sym
); arg
; arg
= arg
->next
)
12462 && arg
->sym
->ts
.type
== BT_DERIVED
12463 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12464 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12465 && !gfc_notify_std (GFC_STD_F2003
, "Procedure %qs in "
12466 "PUBLIC interface %qs at %L "
12467 "takes dummy arguments of %qs which "
12468 "is PRIVATE", iface
->sym
->name
,
12469 sym
->name
, &iface
->sym
->declared_at
,
12470 gfc_typename(&arg
->sym
->ts
)))
12472 /* Stop this message from recurring. */
12473 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12480 if (sym
->attr
.function
&& sym
->value
&& sym
->attr
.proc
!= PROC_ST_FUNCTION
12481 && !sym
->attr
.proc_pointer
)
12483 gfc_error ("Function %qs at %L cannot have an initializer",
12484 sym
->name
, &sym
->declared_at
);
12488 /* An external symbol may not have an initializer because it is taken to be
12489 a procedure. Exception: Procedure Pointers. */
12490 if (sym
->attr
.external
&& sym
->value
&& !sym
->attr
.proc_pointer
)
12492 gfc_error ("External object %qs at %L may not have an initializer",
12493 sym
->name
, &sym
->declared_at
);
12497 /* An elemental function is required to return a scalar 12.7.1 */
12498 if (sym
->attr
.elemental
&& sym
->attr
.function
&& sym
->as
)
12500 gfc_error ("ELEMENTAL function %qs at %L must have a scalar "
12501 "result", sym
->name
, &sym
->declared_at
);
12502 /* Reset so that the error only occurs once. */
12503 sym
->attr
.elemental
= 0;
12507 if (sym
->attr
.proc
== PROC_ST_FUNCTION
12508 && (sym
->attr
.allocatable
|| sym
->attr
.pointer
))
12510 gfc_error ("Statement function %qs at %L may not have pointer or "
12511 "allocatable attribute", sym
->name
, &sym
->declared_at
);
12515 /* 5.1.1.5 of the Standard: A function name declared with an asterisk
12516 char-len-param shall not be array-valued, pointer-valued, recursive
12517 or pure. ....snip... A character value of * may only be used in the
12518 following ways: (i) Dummy arg of procedure - dummy associates with
12519 actual length; (ii) To declare a named constant; or (iii) External
12520 function - but length must be declared in calling scoping unit. */
12521 if (sym
->attr
.function
12522 && sym
->ts
.type
== BT_CHARACTER
&& !sym
->ts
.deferred
12523 && sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
== NULL
)
12525 if ((sym
->as
&& sym
->as
->rank
) || (sym
->attr
.pointer
)
12526 || (sym
->attr
.recursive
) || (sym
->attr
.pure
))
12528 if (sym
->as
&& sym
->as
->rank
)
12529 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12530 "array-valued", sym
->name
, &sym
->declared_at
);
12532 if (sym
->attr
.pointer
)
12533 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12534 "pointer-valued", sym
->name
, &sym
->declared_at
);
12536 if (sym
->attr
.pure
)
12537 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12538 "pure", sym
->name
, &sym
->declared_at
);
12540 if (sym
->attr
.recursive
)
12541 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12542 "recursive", sym
->name
, &sym
->declared_at
);
12547 /* Appendix B.2 of the standard. Contained functions give an
12548 error anyway. Deferred character length is an F2003 feature.
12549 Don't warn on intrinsic conversion functions, which start
12550 with two underscores. */
12551 if (!sym
->attr
.contained
&& !sym
->ts
.deferred
12552 && (sym
->name
[0] != '_' || sym
->name
[1] != '_'))
12553 gfc_notify_std (GFC_STD_F95_OBS
,
12554 "CHARACTER(*) function %qs at %L",
12555 sym
->name
, &sym
->declared_at
);
12558 /* F2008, C1218. */
12559 if (sym
->attr
.elemental
)
12561 if (sym
->attr
.proc_pointer
)
12563 gfc_error ("Procedure pointer %qs at %L shall not be elemental",
12564 sym
->name
, &sym
->declared_at
);
12567 if (sym
->attr
.dummy
)
12569 gfc_error ("Dummy procedure %qs at %L shall not be elemental",
12570 sym
->name
, &sym
->declared_at
);
12575 /* F2018, C15100: "The result of an elemental function shall be scalar,
12576 and shall not have the POINTER or ALLOCATABLE attribute." The scalar
12577 pointer is tested and caught elsewhere. */
12578 if (sym
->attr
.elemental
&& sym
->result
12579 && (sym
->result
->attr
.allocatable
|| sym
->result
->attr
.pointer
))
12581 gfc_error ("Function result variable %qs at %L of elemental "
12582 "function %qs shall not have an ALLOCATABLE or POINTER "
12583 "attribute", sym
->result
->name
,
12584 &sym
->result
->declared_at
, sym
->name
);
12588 if (sym
->attr
.is_bind_c
&& sym
->attr
.is_c_interop
!= 1)
12590 gfc_formal_arglist
*curr_arg
;
12591 int has_non_interop_arg
= 0;
12593 if (!verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
12594 sym
->common_block
))
12596 /* Clear these to prevent looking at them again if there was an
12598 sym
->attr
.is_bind_c
= 0;
12599 sym
->attr
.is_c_interop
= 0;
12600 sym
->ts
.is_c_interop
= 0;
12604 /* So far, no errors have been found. */
12605 sym
->attr
.is_c_interop
= 1;
12606 sym
->ts
.is_c_interop
= 1;
12609 curr_arg
= gfc_sym_get_dummy_args (sym
);
12610 while (curr_arg
!= NULL
)
12612 /* Skip implicitly typed dummy args here. */
12613 if (curr_arg
->sym
&& curr_arg
->sym
->attr
.implicit_type
== 0)
12614 if (!gfc_verify_c_interop_param (curr_arg
->sym
))
12615 /* If something is found to fail, record the fact so we
12616 can mark the symbol for the procedure as not being
12617 BIND(C) to try and prevent multiple errors being
12619 has_non_interop_arg
= 1;
12621 curr_arg
= curr_arg
->next
;
12624 /* See if any of the arguments were not interoperable and if so, clear
12625 the procedure symbol to prevent duplicate error messages. */
12626 if (has_non_interop_arg
!= 0)
12628 sym
->attr
.is_c_interop
= 0;
12629 sym
->ts
.is_c_interop
= 0;
12630 sym
->attr
.is_bind_c
= 0;
12634 if (!sym
->attr
.proc_pointer
)
12636 if (sym
->attr
.save
== SAVE_EXPLICIT
)
12638 gfc_error ("PROCEDURE attribute conflicts with SAVE attribute "
12639 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12642 if (sym
->attr
.intent
)
12644 gfc_error ("PROCEDURE attribute conflicts with INTENT attribute "
12645 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12648 if (sym
->attr
.subroutine
&& sym
->attr
.result
)
12650 gfc_error ("PROCEDURE attribute conflicts with RESULT attribute "
12651 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12654 if (sym
->attr
.external
&& sym
->attr
.function
&& !sym
->attr
.module_procedure
12655 && ((sym
->attr
.if_source
== IFSRC_DECL
&& !sym
->attr
.procedure
)
12656 || sym
->attr
.contained
))
12658 gfc_error ("EXTERNAL attribute conflicts with FUNCTION attribute "
12659 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12662 if (strcmp ("ppr@", sym
->name
) == 0)
12664 gfc_error ("Procedure pointer result %qs at %L "
12665 "is missing the pointer attribute",
12666 sym
->ns
->proc_name
->name
, &sym
->declared_at
);
12671 /* Assume that a procedure whose body is not known has references
12672 to external arrays. */
12673 if (sym
->attr
.if_source
!= IFSRC_DECL
)
12674 sym
->attr
.array_outer_dependency
= 1;
12676 /* Compare the characteristics of a module procedure with the
12677 interface declaration. Ideally this would be done with
12678 gfc_compare_interfaces but, at present, the formal interface
12679 cannot be copied to the ts.interface. */
12680 if (sym
->attr
.module_procedure
12681 && sym
->attr
.if_source
== IFSRC_DECL
)
12684 char name
[2*GFC_MAX_SYMBOL_LEN
+ 1];
12686 char *submodule_name
;
12687 strcpy (name
, sym
->ns
->proc_name
->name
);
12688 module_name
= strtok (name
, ".");
12689 submodule_name
= strtok (NULL
, ".");
12691 iface
= sym
->tlink
;
12694 /* Make sure that the result uses the correct charlen for deferred
12696 if (iface
&& sym
->result
12697 && iface
->ts
.type
== BT_CHARACTER
12698 && iface
->ts
.deferred
)
12699 sym
->result
->ts
.u
.cl
= iface
->ts
.u
.cl
;
12704 /* Check the procedure characteristics. */
12705 if (sym
->attr
.elemental
!= iface
->attr
.elemental
)
12707 gfc_error ("Mismatch in ELEMENTAL attribute between MODULE "
12708 "PROCEDURE at %L and its interface in %s",
12709 &sym
->declared_at
, module_name
);
12713 if (sym
->attr
.pure
!= iface
->attr
.pure
)
12715 gfc_error ("Mismatch in PURE attribute between MODULE "
12716 "PROCEDURE at %L and its interface in %s",
12717 &sym
->declared_at
, module_name
);
12721 if (sym
->attr
.recursive
!= iface
->attr
.recursive
)
12723 gfc_error ("Mismatch in RECURSIVE attribute between MODULE "
12724 "PROCEDURE at %L and its interface in %s",
12725 &sym
->declared_at
, module_name
);
12729 /* Check the result characteristics. */
12730 if (!gfc_check_result_characteristics (sym
, iface
, errmsg
, 200))
12732 gfc_error ("%s between the MODULE PROCEDURE declaration "
12733 "in MODULE %qs and the declaration at %L in "
12735 errmsg
, module_name
, &sym
->declared_at
,
12736 submodule_name
? submodule_name
: module_name
);
12741 /* Check the characteristics of the formal arguments. */
12742 if (sym
->formal
&& sym
->formal_ns
)
12744 for (arg
= sym
->formal
; arg
&& arg
->sym
; arg
= arg
->next
)
12747 gfc_traverse_ns (sym
->formal_ns
, compare_fsyms
);
12755 /* Resolve a list of finalizer procedures. That is, after they have hopefully
12756 been defined and we now know their defined arguments, check that they fulfill
12757 the requirements of the standard for procedures used as finalizers. */
12760 gfc_resolve_finalizers (gfc_symbol
* derived
, bool *finalizable
)
12762 gfc_finalizer
* list
;
12763 gfc_finalizer
** prev_link
; /* For removing wrong entries from the list. */
12764 bool result
= true;
12765 bool seen_scalar
= false;
12768 gfc_symbol
*parent
= gfc_get_derived_super_type (derived
);
12771 gfc_resolve_finalizers (parent
, finalizable
);
12773 /* Ensure that derived-type components have a their finalizers resolved. */
12774 bool has_final
= derived
->f2k_derived
&& derived
->f2k_derived
->finalizers
;
12775 for (c
= derived
->components
; c
; c
= c
->next
)
12776 if (c
->ts
.type
== BT_DERIVED
12777 && !c
->attr
.pointer
&& !c
->attr
.proc_pointer
&& !c
->attr
.allocatable
)
12779 bool has_final2
= false;
12780 if (!gfc_resolve_finalizers (c
->ts
.u
.derived
, &has_final2
))
12781 return false; /* Error. */
12782 has_final
= has_final
|| has_final2
;
12784 /* Return early if not finalizable. */
12788 *finalizable
= false;
12792 /* Walk over the list of finalizer-procedures, check them, and if any one
12793 does not fit in with the standard's definition, print an error and remove
12794 it from the list. */
12795 prev_link
= &derived
->f2k_derived
->finalizers
;
12796 for (list
= derived
->f2k_derived
->finalizers
; list
; list
= *prev_link
)
12798 gfc_formal_arglist
*dummy_args
;
12803 /* Skip this finalizer if we already resolved it. */
12804 if (list
->proc_tree
)
12806 if (list
->proc_tree
->n
.sym
->formal
->sym
->as
== NULL
12807 || list
->proc_tree
->n
.sym
->formal
->sym
->as
->rank
== 0)
12808 seen_scalar
= true;
12809 prev_link
= &(list
->next
);
12813 /* Check this exists and is a SUBROUTINE. */
12814 if (!list
->proc_sym
->attr
.subroutine
)
12816 gfc_error ("FINAL procedure %qs at %L is not a SUBROUTINE",
12817 list
->proc_sym
->name
, &list
->where
);
12821 /* We should have exactly one argument. */
12822 dummy_args
= gfc_sym_get_dummy_args (list
->proc_sym
);
12823 if (!dummy_args
|| dummy_args
->next
)
12825 gfc_error ("FINAL procedure at %L must have exactly one argument",
12829 arg
= dummy_args
->sym
;
12831 /* This argument must be of our type. */
12832 if (arg
->ts
.type
!= BT_DERIVED
|| arg
->ts
.u
.derived
!= derived
)
12834 gfc_error ("Argument of FINAL procedure at %L must be of type %qs",
12835 &arg
->declared_at
, derived
->name
);
12839 /* It must neither be a pointer nor allocatable nor optional. */
12840 if (arg
->attr
.pointer
)
12842 gfc_error ("Argument of FINAL procedure at %L must not be a POINTER",
12843 &arg
->declared_at
);
12846 if (arg
->attr
.allocatable
)
12848 gfc_error ("Argument of FINAL procedure at %L must not be"
12849 " ALLOCATABLE", &arg
->declared_at
);
12852 if (arg
->attr
.optional
)
12854 gfc_error ("Argument of FINAL procedure at %L must not be OPTIONAL",
12855 &arg
->declared_at
);
12859 /* It must not be INTENT(OUT). */
12860 if (arg
->attr
.intent
== INTENT_OUT
)
12862 gfc_error ("Argument of FINAL procedure at %L must not be"
12863 " INTENT(OUT)", &arg
->declared_at
);
12867 /* Warn if the procedure is non-scalar and not assumed shape. */
12868 if (warn_surprising
&& arg
->as
&& arg
->as
->rank
!= 0
12869 && arg
->as
->type
!= AS_ASSUMED_SHAPE
)
12870 gfc_warning (OPT_Wsurprising
,
12871 "Non-scalar FINAL procedure at %L should have assumed"
12872 " shape argument", &arg
->declared_at
);
12874 /* Check that it does not match in kind and rank with a FINAL procedure
12875 defined earlier. To really loop over the *earlier* declarations,
12876 we need to walk the tail of the list as new ones were pushed at the
12878 /* TODO: Handle kind parameters once they are implemented. */
12879 my_rank
= (arg
->as
? arg
->as
->rank
: 0);
12880 for (i
= list
->next
; i
; i
= i
->next
)
12882 gfc_formal_arglist
*dummy_args
;
12884 /* Argument list might be empty; that is an error signalled earlier,
12885 but we nevertheless continued resolving. */
12886 dummy_args
= gfc_sym_get_dummy_args (i
->proc_sym
);
12889 gfc_symbol
* i_arg
= dummy_args
->sym
;
12890 const int i_rank
= (i_arg
->as
? i_arg
->as
->rank
: 0);
12891 if (i_rank
== my_rank
)
12893 gfc_error ("FINAL procedure %qs declared at %L has the same"
12894 " rank (%d) as %qs",
12895 list
->proc_sym
->name
, &list
->where
, my_rank
,
12896 i
->proc_sym
->name
);
12902 /* Is this the/a scalar finalizer procedure? */
12904 seen_scalar
= true;
12906 /* Find the symtree for this procedure. */
12907 gcc_assert (!list
->proc_tree
);
12908 list
->proc_tree
= gfc_find_sym_in_symtree (list
->proc_sym
);
12910 prev_link
= &list
->next
;
12913 /* Remove wrong nodes immediately from the list so we don't risk any
12914 troubles in the future when they might fail later expectations. */
12917 *prev_link
= list
->next
;
12918 gfc_free_finalizer (i
);
12922 if (result
== false)
12925 /* Warn if we haven't seen a scalar finalizer procedure (but we know there
12926 were nodes in the list, must have been for arrays. It is surely a good
12927 idea to have a scalar version there if there's something to finalize. */
12928 if (warn_surprising
&& derived
->f2k_derived
->finalizers
&& !seen_scalar
)
12929 gfc_warning (OPT_Wsurprising
,
12930 "Only array FINAL procedures declared for derived type %qs"
12931 " defined at %L, suggest also scalar one",
12932 derived
->name
, &derived
->declared_at
);
12934 vtab
= gfc_find_derived_vtab (derived
);
12935 c
= vtab
->ts
.u
.derived
->components
->next
->next
->next
->next
->next
;
12936 gfc_set_sym_referenced (c
->initializer
->symtree
->n
.sym
);
12939 *finalizable
= true;
12945 /* Check if two GENERIC targets are ambiguous and emit an error is they are. */
12948 check_generic_tbp_ambiguity (gfc_tbp_generic
* t1
, gfc_tbp_generic
* t2
,
12949 const char* generic_name
, locus where
)
12951 gfc_symbol
*sym1
, *sym2
;
12952 const char *pass1
, *pass2
;
12953 gfc_formal_arglist
*dummy_args
;
12955 gcc_assert (t1
->specific
&& t2
->specific
);
12956 gcc_assert (!t1
->specific
->is_generic
);
12957 gcc_assert (!t2
->specific
->is_generic
);
12958 gcc_assert (t1
->is_operator
== t2
->is_operator
);
12960 sym1
= t1
->specific
->u
.specific
->n
.sym
;
12961 sym2
= t2
->specific
->u
.specific
->n
.sym
;
12966 /* Both must be SUBROUTINEs or both must be FUNCTIONs. */
12967 if (sym1
->attr
.subroutine
!= sym2
->attr
.subroutine
12968 || sym1
->attr
.function
!= sym2
->attr
.function
)
12970 gfc_error ("%qs and %qs can't be mixed FUNCTION/SUBROUTINE for"
12971 " GENERIC %qs at %L",
12972 sym1
->name
, sym2
->name
, generic_name
, &where
);
12976 /* Determine PASS arguments. */
12977 if (t1
->specific
->nopass
)
12979 else if (t1
->specific
->pass_arg
)
12980 pass1
= t1
->specific
->pass_arg
;
12983 dummy_args
= gfc_sym_get_dummy_args (t1
->specific
->u
.specific
->n
.sym
);
12985 pass1
= dummy_args
->sym
->name
;
12989 if (t2
->specific
->nopass
)
12991 else if (t2
->specific
->pass_arg
)
12992 pass2
= t2
->specific
->pass_arg
;
12995 dummy_args
= gfc_sym_get_dummy_args (t2
->specific
->u
.specific
->n
.sym
);
12997 pass2
= dummy_args
->sym
->name
;
13002 /* Compare the interfaces. */
13003 if (gfc_compare_interfaces (sym1
, sym2
, sym2
->name
, !t1
->is_operator
, 0,
13004 NULL
, 0, pass1
, pass2
))
13006 gfc_error ("%qs and %qs for GENERIC %qs at %L are ambiguous",
13007 sym1
->name
, sym2
->name
, generic_name
, &where
);
13015 /* Worker function for resolving a generic procedure binding; this is used to
13016 resolve GENERIC as well as user and intrinsic OPERATOR typebound procedures.
13018 The difference between those cases is finding possible inherited bindings
13019 that are overridden, as one has to look for them in tb_sym_root,
13020 tb_uop_root or tb_op, respectively. Thus the caller must already find
13021 the super-type and set p->overridden correctly. */
13024 resolve_tb_generic_targets (gfc_symbol
* super_type
,
13025 gfc_typebound_proc
* p
, const char* name
)
13027 gfc_tbp_generic
* target
;
13028 gfc_symtree
* first_target
;
13029 gfc_symtree
* inherited
;
13031 gcc_assert (p
&& p
->is_generic
);
13033 /* Try to find the specific bindings for the symtrees in our target-list. */
13034 gcc_assert (p
->u
.generic
);
13035 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13036 if (!target
->specific
)
13038 gfc_typebound_proc
* overridden_tbp
;
13039 gfc_tbp_generic
* g
;
13040 const char* target_name
;
13042 target_name
= target
->specific_st
->name
;
13044 /* Defined for this type directly. */
13045 if (target
->specific_st
->n
.tb
&& !target
->specific_st
->n
.tb
->error
)
13047 target
->specific
= target
->specific_st
->n
.tb
;
13048 goto specific_found
;
13051 /* Look for an inherited specific binding. */
13054 inherited
= gfc_find_typebound_proc (super_type
, NULL
, target_name
,
13059 gcc_assert (inherited
->n
.tb
);
13060 target
->specific
= inherited
->n
.tb
;
13061 goto specific_found
;
13065 gfc_error ("Undefined specific binding %qs as target of GENERIC %qs"
13066 " at %L", target_name
, name
, &p
->where
);
13069 /* Once we've found the specific binding, check it is not ambiguous with
13070 other specifics already found or inherited for the same GENERIC. */
13072 gcc_assert (target
->specific
);
13074 /* This must really be a specific binding! */
13075 if (target
->specific
->is_generic
)
13077 gfc_error ("GENERIC %qs at %L must target a specific binding,"
13078 " %qs is GENERIC, too", name
, &p
->where
, target_name
);
13082 /* Check those already resolved on this type directly. */
13083 for (g
= p
->u
.generic
; g
; g
= g
->next
)
13084 if (g
!= target
&& g
->specific
13085 && !check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13088 /* Check for ambiguity with inherited specific targets. */
13089 for (overridden_tbp
= p
->overridden
; overridden_tbp
;
13090 overridden_tbp
= overridden_tbp
->overridden
)
13091 if (overridden_tbp
->is_generic
)
13093 for (g
= overridden_tbp
->u
.generic
; g
; g
= g
->next
)
13095 gcc_assert (g
->specific
);
13096 if (!check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13102 /* If we attempt to "overwrite" a specific binding, this is an error. */
13103 if (p
->overridden
&& !p
->overridden
->is_generic
)
13105 gfc_error ("GENERIC %qs at %L can't overwrite specific binding with"
13106 " the same name", name
, &p
->where
);
13110 /* Take the SUBROUTINE/FUNCTION attributes of the first specific target, as
13111 all must have the same attributes here. */
13112 first_target
= p
->u
.generic
->specific
->u
.specific
;
13113 gcc_assert (first_target
);
13114 p
->subroutine
= first_target
->n
.sym
->attr
.subroutine
;
13115 p
->function
= first_target
->n
.sym
->attr
.function
;
13121 /* Resolve a GENERIC procedure binding for a derived type. */
13124 resolve_typebound_generic (gfc_symbol
* derived
, gfc_symtree
* st
)
13126 gfc_symbol
* super_type
;
13128 /* Find the overridden binding if any. */
13129 st
->n
.tb
->overridden
= NULL
;
13130 super_type
= gfc_get_derived_super_type (derived
);
13133 gfc_symtree
* overridden
;
13134 overridden
= gfc_find_typebound_proc (super_type
, NULL
, st
->name
,
13137 if (overridden
&& overridden
->n
.tb
)
13138 st
->n
.tb
->overridden
= overridden
->n
.tb
;
13141 /* Resolve using worker function. */
13142 return resolve_tb_generic_targets (super_type
, st
->n
.tb
, st
->name
);
13146 /* Retrieve the target-procedure of an operator binding and do some checks in
13147 common for intrinsic and user-defined type-bound operators. */
13150 get_checked_tb_operator_target (gfc_tbp_generic
* target
, locus where
)
13152 gfc_symbol
* target_proc
;
13154 gcc_assert (target
->specific
&& !target
->specific
->is_generic
);
13155 target_proc
= target
->specific
->u
.specific
->n
.sym
;
13156 gcc_assert (target_proc
);
13158 /* F08:C468. All operator bindings must have a passed-object dummy argument. */
13159 if (target
->specific
->nopass
)
13161 gfc_error ("Type-bound operator at %L can't be NOPASS", &where
);
13165 return target_proc
;
13169 /* Resolve a type-bound intrinsic operator. */
13172 resolve_typebound_intrinsic_op (gfc_symbol
* derived
, gfc_intrinsic_op op
,
13173 gfc_typebound_proc
* p
)
13175 gfc_symbol
* super_type
;
13176 gfc_tbp_generic
* target
;
13178 /* If there's already an error here, do nothing (but don't fail again). */
13182 /* Operators should always be GENERIC bindings. */
13183 gcc_assert (p
->is_generic
);
13185 /* Look for an overridden binding. */
13186 super_type
= gfc_get_derived_super_type (derived
);
13187 if (super_type
&& super_type
->f2k_derived
)
13188 p
->overridden
= gfc_find_typebound_intrinsic_op (super_type
, NULL
,
13191 p
->overridden
= NULL
;
13193 /* Resolve general GENERIC properties using worker function. */
13194 if (!resolve_tb_generic_targets (super_type
, p
, gfc_op2string(op
)))
13197 /* Check the targets to be procedures of correct interface. */
13198 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13200 gfc_symbol
* target_proc
;
13202 target_proc
= get_checked_tb_operator_target (target
, p
->where
);
13206 if (!gfc_check_operator_interface (target_proc
, op
, p
->where
))
13209 /* Add target to non-typebound operator list. */
13210 if (!target
->specific
->deferred
&& !derived
->attr
.use_assoc
13211 && p
->access
!= ACCESS_PRIVATE
&& derived
->ns
== gfc_current_ns
)
13213 gfc_interface
*head
, *intr
;
13215 /* Preempt 'gfc_check_new_interface' for submodules, where the
13216 mechanism for handling module procedures winds up resolving
13217 operator interfaces twice and would otherwise cause an error. */
13218 for (intr
= derived
->ns
->op
[op
]; intr
; intr
= intr
->next
)
13219 if (intr
->sym
== target_proc
13220 && target_proc
->attr
.used_in_submodule
)
13223 if (!gfc_check_new_interface (derived
->ns
->op
[op
],
13224 target_proc
, p
->where
))
13226 head
= derived
->ns
->op
[op
];
13227 intr
= gfc_get_interface ();
13228 intr
->sym
= target_proc
;
13229 intr
->where
= p
->where
;
13231 derived
->ns
->op
[op
] = intr
;
13243 /* Resolve a type-bound user operator (tree-walker callback). */
13245 static gfc_symbol
* resolve_bindings_derived
;
13246 static bool resolve_bindings_result
;
13248 static bool check_uop_procedure (gfc_symbol
* sym
, locus where
);
13251 resolve_typebound_user_op (gfc_symtree
* stree
)
13253 gfc_symbol
* super_type
;
13254 gfc_tbp_generic
* target
;
13256 gcc_assert (stree
&& stree
->n
.tb
);
13258 if (stree
->n
.tb
->error
)
13261 /* Operators should always be GENERIC bindings. */
13262 gcc_assert (stree
->n
.tb
->is_generic
);
13264 /* Find overridden procedure, if any. */
13265 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13266 if (super_type
&& super_type
->f2k_derived
)
13268 gfc_symtree
* overridden
;
13269 overridden
= gfc_find_typebound_user_op (super_type
, NULL
,
13270 stree
->name
, true, NULL
);
13272 if (overridden
&& overridden
->n
.tb
)
13273 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13276 stree
->n
.tb
->overridden
= NULL
;
13278 /* Resolve basically using worker function. */
13279 if (!resolve_tb_generic_targets (super_type
, stree
->n
.tb
, stree
->name
))
13282 /* Check the targets to be functions of correct interface. */
13283 for (target
= stree
->n
.tb
->u
.generic
; target
; target
= target
->next
)
13285 gfc_symbol
* target_proc
;
13287 target_proc
= get_checked_tb_operator_target (target
, stree
->n
.tb
->where
);
13291 if (!check_uop_procedure (target_proc
, stree
->n
.tb
->where
))
13298 resolve_bindings_result
= false;
13299 stree
->n
.tb
->error
= 1;
13303 /* Resolve the type-bound procedures for a derived type. */
13306 resolve_typebound_procedure (gfc_symtree
* stree
)
13310 gfc_symbol
* me_arg
;
13311 gfc_symbol
* super_type
;
13312 gfc_component
* comp
;
13314 gcc_assert (stree
);
13316 /* Undefined specific symbol from GENERIC target definition. */
13320 if (stree
->n
.tb
->error
)
13323 /* If this is a GENERIC binding, use that routine. */
13324 if (stree
->n
.tb
->is_generic
)
13326 if (!resolve_typebound_generic (resolve_bindings_derived
, stree
))
13331 /* Get the target-procedure to check it. */
13332 gcc_assert (!stree
->n
.tb
->is_generic
);
13333 gcc_assert (stree
->n
.tb
->u
.specific
);
13334 proc
= stree
->n
.tb
->u
.specific
->n
.sym
;
13335 where
= stree
->n
.tb
->where
;
13337 /* Default access should already be resolved from the parser. */
13338 gcc_assert (stree
->n
.tb
->access
!= ACCESS_UNKNOWN
);
13340 if (stree
->n
.tb
->deferred
)
13342 if (!check_proc_interface (proc
, &where
))
13347 /* Check for F08:C465. */
13348 if ((!proc
->attr
.subroutine
&& !proc
->attr
.function
)
13349 || (proc
->attr
.proc
!= PROC_MODULE
13350 && proc
->attr
.if_source
!= IFSRC_IFBODY
)
13351 || proc
->attr
.abstract
)
13353 gfc_error ("%qs must be a module procedure or an external procedure with"
13354 " an explicit interface at %L", proc
->name
, &where
);
13359 stree
->n
.tb
->subroutine
= proc
->attr
.subroutine
;
13360 stree
->n
.tb
->function
= proc
->attr
.function
;
13362 /* Find the super-type of the current derived type. We could do this once and
13363 store in a global if speed is needed, but as long as not I believe this is
13364 more readable and clearer. */
13365 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13367 /* If PASS, resolve and check arguments if not already resolved / loaded
13368 from a .mod file. */
13369 if (!stree
->n
.tb
->nopass
&& stree
->n
.tb
->pass_arg_num
== 0)
13371 gfc_formal_arglist
*dummy_args
;
13373 dummy_args
= gfc_sym_get_dummy_args (proc
);
13374 if (stree
->n
.tb
->pass_arg
)
13376 gfc_formal_arglist
*i
;
13378 /* If an explicit passing argument name is given, walk the arg-list
13379 and look for it. */
13382 stree
->n
.tb
->pass_arg_num
= 1;
13383 for (i
= dummy_args
; i
; i
= i
->next
)
13385 if (!strcmp (i
->sym
->name
, stree
->n
.tb
->pass_arg
))
13390 ++stree
->n
.tb
->pass_arg_num
;
13395 gfc_error ("Procedure %qs with PASS(%s) at %L has no"
13397 proc
->name
, stree
->n
.tb
->pass_arg
, &where
,
13398 stree
->n
.tb
->pass_arg
);
13404 /* Otherwise, take the first one; there should in fact be at least
13406 stree
->n
.tb
->pass_arg_num
= 1;
13409 gfc_error ("Procedure %qs with PASS at %L must have at"
13410 " least one argument", proc
->name
, &where
);
13413 me_arg
= dummy_args
->sym
;
13416 /* Now check that the argument-type matches and the passed-object
13417 dummy argument is generally fine. */
13419 gcc_assert (me_arg
);
13421 if (me_arg
->ts
.type
!= BT_CLASS
)
13423 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13424 " at %L", proc
->name
, &where
);
13428 if (CLASS_DATA (me_arg
)->ts
.u
.derived
13429 != resolve_bindings_derived
)
13431 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13432 " the derived-type %qs", me_arg
->name
, proc
->name
,
13433 me_arg
->name
, &where
, resolve_bindings_derived
->name
);
13437 gcc_assert (me_arg
->ts
.type
== BT_CLASS
);
13438 if (CLASS_DATA (me_arg
)->as
&& CLASS_DATA (me_arg
)->as
->rank
!= 0)
13440 gfc_error ("Passed-object dummy argument of %qs at %L must be"
13441 " scalar", proc
->name
, &where
);
13444 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13446 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13447 " be ALLOCATABLE", proc
->name
, &where
);
13450 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13452 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13453 " be POINTER", proc
->name
, &where
);
13458 /* If we are extending some type, check that we don't override a procedure
13459 flagged NON_OVERRIDABLE. */
13460 stree
->n
.tb
->overridden
= NULL
;
13463 gfc_symtree
* overridden
;
13464 overridden
= gfc_find_typebound_proc (super_type
, NULL
,
13465 stree
->name
, true, NULL
);
13469 if (overridden
->n
.tb
)
13470 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13472 if (!gfc_check_typebound_override (stree
, overridden
))
13477 /* See if there's a name collision with a component directly in this type. */
13478 for (comp
= resolve_bindings_derived
->components
; comp
; comp
= comp
->next
)
13479 if (!strcmp (comp
->name
, stree
->name
))
13481 gfc_error ("Procedure %qs at %L has the same name as a component of"
13483 stree
->name
, &where
, resolve_bindings_derived
->name
);
13487 /* Try to find a name collision with an inherited component. */
13488 if (super_type
&& gfc_find_component (super_type
, stree
->name
, true, true,
13491 gfc_error ("Procedure %qs at %L has the same name as an inherited"
13492 " component of %qs",
13493 stree
->name
, &where
, resolve_bindings_derived
->name
);
13497 stree
->n
.tb
->error
= 0;
13501 resolve_bindings_result
= false;
13502 stree
->n
.tb
->error
= 1;
13507 resolve_typebound_procedures (gfc_symbol
* derived
)
13510 gfc_symbol
* super_type
;
13512 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->tb_sym_root
)
13515 super_type
= gfc_get_derived_super_type (derived
);
13517 resolve_symbol (super_type
);
13519 resolve_bindings_derived
= derived
;
13520 resolve_bindings_result
= true;
13522 if (derived
->f2k_derived
->tb_sym_root
)
13523 gfc_traverse_symtree (derived
->f2k_derived
->tb_sym_root
,
13524 &resolve_typebound_procedure
);
13526 if (derived
->f2k_derived
->tb_uop_root
)
13527 gfc_traverse_symtree (derived
->f2k_derived
->tb_uop_root
,
13528 &resolve_typebound_user_op
);
13530 for (op
= 0; op
!= GFC_INTRINSIC_OPS
; ++op
)
13532 gfc_typebound_proc
* p
= derived
->f2k_derived
->tb_op
[op
];
13533 if (p
&& !resolve_typebound_intrinsic_op (derived
,
13534 (gfc_intrinsic_op
)op
, p
))
13535 resolve_bindings_result
= false;
13538 return resolve_bindings_result
;
13542 /* Add a derived type to the dt_list. The dt_list is used in trans-types.c
13543 to give all identical derived types the same backend_decl. */
13545 add_dt_to_dt_list (gfc_symbol
*derived
)
13547 if (!derived
->dt_next
)
13549 if (gfc_derived_types
)
13551 derived
->dt_next
= gfc_derived_types
->dt_next
;
13552 gfc_derived_types
->dt_next
= derived
;
13556 derived
->dt_next
= derived
;
13558 gfc_derived_types
= derived
;
13563 /* Ensure that a derived-type is really not abstract, meaning that every
13564 inherited DEFERRED binding is overridden by a non-DEFERRED one. */
13567 ensure_not_abstract_walker (gfc_symbol
* sub
, gfc_symtree
* st
)
13572 if (!ensure_not_abstract_walker (sub
, st
->left
))
13574 if (!ensure_not_abstract_walker (sub
, st
->right
))
13577 if (st
->n
.tb
&& st
->n
.tb
->deferred
)
13579 gfc_symtree
* overriding
;
13580 overriding
= gfc_find_typebound_proc (sub
, NULL
, st
->name
, true, NULL
);
13583 gcc_assert (overriding
->n
.tb
);
13584 if (overriding
->n
.tb
->deferred
)
13586 gfc_error ("Derived-type %qs declared at %L must be ABSTRACT because"
13587 " %qs is DEFERRED and not overridden",
13588 sub
->name
, &sub
->declared_at
, st
->name
);
13597 ensure_not_abstract (gfc_symbol
* sub
, gfc_symbol
* ancestor
)
13599 /* The algorithm used here is to recursively travel up the ancestry of sub
13600 and for each ancestor-type, check all bindings. If any of them is
13601 DEFERRED, look it up starting from sub and see if the found (overriding)
13602 binding is not DEFERRED.
13603 This is not the most efficient way to do this, but it should be ok and is
13604 clearer than something sophisticated. */
13606 gcc_assert (ancestor
&& !sub
->attr
.abstract
);
13608 if (!ancestor
->attr
.abstract
)
13611 /* Walk bindings of this ancestor. */
13612 if (ancestor
->f2k_derived
)
13615 t
= ensure_not_abstract_walker (sub
, ancestor
->f2k_derived
->tb_sym_root
);
13620 /* Find next ancestor type and recurse on it. */
13621 ancestor
= gfc_get_derived_super_type (ancestor
);
13623 return ensure_not_abstract (sub
, ancestor
);
13629 /* This check for typebound defined assignments is done recursively
13630 since the order in which derived types are resolved is not always in
13631 order of the declarations. */
13634 check_defined_assignments (gfc_symbol
*derived
)
13638 for (c
= derived
->components
; c
; c
= c
->next
)
13640 if (!gfc_bt_struct (c
->ts
.type
)
13642 || c
->attr
.allocatable
13643 || c
->attr
.proc_pointer_comp
13644 || c
->attr
.class_pointer
13645 || c
->attr
.proc_pointer
)
13648 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
13649 || (c
->ts
.u
.derived
->f2k_derived
13650 && c
->ts
.u
.derived
->f2k_derived
->tb_op
[INTRINSIC_ASSIGN
]))
13652 derived
->attr
.defined_assign_comp
= 1;
13656 check_defined_assignments (c
->ts
.u
.derived
);
13657 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
13659 derived
->attr
.defined_assign_comp
= 1;
13666 /* Resolve a single component of a derived type or structure. */
13669 resolve_component (gfc_component
*c
, gfc_symbol
*sym
)
13671 gfc_symbol
*super_type
;
13673 if (c
->attr
.artificial
)
13676 /* Do not allow vtype components to be resolved in nameless namespaces
13677 such as block data because the procedure pointers will cause ICEs
13678 and vtables are not needed in these contexts. */
13679 if (sym
->attr
.vtype
&& sym
->attr
.use_assoc
13680 && sym
->ns
->proc_name
== NULL
)
13684 if ((!sym
->attr
.is_class
|| c
!= sym
->components
)
13685 && c
->attr
.codimension
13686 && (!c
->attr
.allocatable
|| (c
->as
&& c
->as
->type
!= AS_DEFERRED
)))
13688 gfc_error ("Coarray component %qs at %L must be allocatable with "
13689 "deferred shape", c
->name
, &c
->loc
);
13694 if (c
->attr
.codimension
&& c
->ts
.type
== BT_DERIVED
13695 && c
->ts
.u
.derived
->ts
.is_iso_c
)
13697 gfc_error ("Component %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
13698 "shall not be a coarray", c
->name
, &c
->loc
);
13703 if (gfc_bt_struct (c
->ts
.type
) && c
->ts
.u
.derived
->attr
.coarray_comp
13704 && (c
->attr
.codimension
|| c
->attr
.pointer
|| c
->attr
.dimension
13705 || c
->attr
.allocatable
))
13707 gfc_error ("Component %qs at %L with coarray component "
13708 "shall be a nonpointer, nonallocatable scalar",
13714 if (c
->attr
.contiguous
&& (!c
->attr
.dimension
|| !c
->attr
.pointer
))
13716 gfc_error ("Component %qs at %L has the CONTIGUOUS attribute but "
13717 "is not an array pointer", c
->name
, &c
->loc
);
13721 /* F2003, 15.2.1 - length has to be one. */
13722 if (sym
->attr
.is_bind_c
&& c
->ts
.type
== BT_CHARACTER
13723 && (c
->ts
.u
.cl
== NULL
|| c
->ts
.u
.cl
->length
== NULL
13724 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
)
13725 || mpz_cmp_si (c
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
13727 gfc_error ("Component %qs of BIND(C) type at %L must have length one",
13732 if (c
->attr
.proc_pointer
&& c
->ts
.interface
)
13734 gfc_symbol
*ifc
= c
->ts
.interface
;
13736 if (!sym
->attr
.vtype
&& !check_proc_interface (ifc
, &c
->loc
))
13742 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
13744 /* Resolve interface and copy attributes. */
13745 if (ifc
->formal
&& !ifc
->formal_ns
)
13746 resolve_symbol (ifc
);
13747 if (ifc
->attr
.intrinsic
)
13748 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
13752 c
->ts
= ifc
->result
->ts
;
13753 c
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
13754 c
->attr
.pointer
= ifc
->result
->attr
.pointer
;
13755 c
->attr
.dimension
= ifc
->result
->attr
.dimension
;
13756 c
->as
= gfc_copy_array_spec (ifc
->result
->as
);
13757 c
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
13762 c
->attr
.allocatable
= ifc
->attr
.allocatable
;
13763 c
->attr
.pointer
= ifc
->attr
.pointer
;
13764 c
->attr
.dimension
= ifc
->attr
.dimension
;
13765 c
->as
= gfc_copy_array_spec (ifc
->as
);
13766 c
->attr
.class_ok
= ifc
->attr
.class_ok
;
13768 c
->ts
.interface
= ifc
;
13769 c
->attr
.function
= ifc
->attr
.function
;
13770 c
->attr
.subroutine
= ifc
->attr
.subroutine
;
13772 c
->attr
.pure
= ifc
->attr
.pure
;
13773 c
->attr
.elemental
= ifc
->attr
.elemental
;
13774 c
->attr
.recursive
= ifc
->attr
.recursive
;
13775 c
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
13776 c
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
13777 /* Copy char length. */
13778 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
13780 gfc_charlen
*cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
13781 if (cl
->length
&& !cl
->resolved
13782 && !gfc_resolve_expr (cl
->length
))
13791 else if (c
->attr
.proc_pointer
&& c
->ts
.type
== BT_UNKNOWN
)
13793 /* Since PPCs are not implicitly typed, a PPC without an explicit
13794 interface must be a subroutine. */
13795 gfc_add_subroutine (&c
->attr
, c
->name
, &c
->loc
);
13798 /* Procedure pointer components: Check PASS arg. */
13799 if (c
->attr
.proc_pointer
&& !c
->tb
->nopass
&& c
->tb
->pass_arg_num
== 0
13800 && !sym
->attr
.vtype
)
13802 gfc_symbol
* me_arg
;
13804 if (c
->tb
->pass_arg
)
13806 gfc_formal_arglist
* i
;
13808 /* If an explicit passing argument name is given, walk the arg-list
13809 and look for it. */
13812 c
->tb
->pass_arg_num
= 1;
13813 for (i
= c
->ts
.interface
->formal
; i
; i
= i
->next
)
13815 if (!strcmp (i
->sym
->name
, c
->tb
->pass_arg
))
13820 c
->tb
->pass_arg_num
++;
13825 gfc_error ("Procedure pointer component %qs with PASS(%s) "
13826 "at %L has no argument %qs", c
->name
,
13827 c
->tb
->pass_arg
, &c
->loc
, c
->tb
->pass_arg
);
13834 /* Otherwise, take the first one; there should in fact be at least
13836 c
->tb
->pass_arg_num
= 1;
13837 if (!c
->ts
.interface
->formal
)
13839 gfc_error ("Procedure pointer component %qs with PASS at %L "
13840 "must have at least one argument",
13845 me_arg
= c
->ts
.interface
->formal
->sym
;
13848 /* Now check that the argument-type matches. */
13849 gcc_assert (me_arg
);
13850 if ((me_arg
->ts
.type
!= BT_DERIVED
&& me_arg
->ts
.type
!= BT_CLASS
)
13851 || (me_arg
->ts
.type
== BT_DERIVED
&& me_arg
->ts
.u
.derived
!= sym
)
13852 || (me_arg
->ts
.type
== BT_CLASS
13853 && CLASS_DATA (me_arg
)->ts
.u
.derived
!= sym
))
13855 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13856 " the derived type %qs", me_arg
->name
, c
->name
,
13857 me_arg
->name
, &c
->loc
, sym
->name
);
13862 /* Check for F03:C453. */
13863 if (CLASS_DATA (me_arg
)->attr
.dimension
)
13865 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13866 "must be scalar", me_arg
->name
, c
->name
, me_arg
->name
,
13872 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13874 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13875 "may not have the POINTER attribute", me_arg
->name
,
13876 c
->name
, me_arg
->name
, &c
->loc
);
13881 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13883 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13884 "may not be ALLOCATABLE", me_arg
->name
, c
->name
,
13885 me_arg
->name
, &c
->loc
);
13890 if (gfc_type_is_extensible (sym
) && me_arg
->ts
.type
!= BT_CLASS
)
13892 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13893 " at %L", c
->name
, &c
->loc
);
13899 /* Check type-spec if this is not the parent-type component. */
13900 if (((sym
->attr
.is_class
13901 && (!sym
->components
->ts
.u
.derived
->attr
.extension
13902 || c
!= sym
->components
->ts
.u
.derived
->components
))
13903 || (!sym
->attr
.is_class
13904 && (!sym
->attr
.extension
|| c
!= sym
->components
)))
13905 && !sym
->attr
.vtype
13906 && !resolve_typespec_used (&c
->ts
, &c
->loc
, c
->name
))
13909 super_type
= gfc_get_derived_super_type (sym
);
13911 /* If this type is an extension, set the accessibility of the parent
13914 && ((sym
->attr
.is_class
13915 && c
== sym
->components
->ts
.u
.derived
->components
)
13916 || (!sym
->attr
.is_class
&& c
== sym
->components
))
13917 && strcmp (super_type
->name
, c
->name
) == 0)
13918 c
->attr
.access
= super_type
->attr
.access
;
13920 /* If this type is an extension, see if this component has the same name
13921 as an inherited type-bound procedure. */
13922 if (super_type
&& !sym
->attr
.is_class
13923 && gfc_find_typebound_proc (super_type
, NULL
, c
->name
, true, NULL
))
13925 gfc_error ("Component %qs of %qs at %L has the same name as an"
13926 " inherited type-bound procedure",
13927 c
->name
, sym
->name
, &c
->loc
);
13931 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.proc_pointer
13932 && !c
->ts
.deferred
)
13934 if (c
->ts
.u
.cl
->length
== NULL
13935 || (!resolve_charlen(c
->ts
.u
.cl
))
13936 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
))
13938 gfc_error ("Character length of component %qs needs to "
13939 "be a constant specification expression at %L",
13941 c
->ts
.u
.cl
->length
? &c
->ts
.u
.cl
->length
->where
: &c
->loc
);
13946 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.deferred
13947 && !c
->attr
.pointer
&& !c
->attr
.allocatable
)
13949 gfc_error ("Character component %qs of %qs at %L with deferred "
13950 "length must be a POINTER or ALLOCATABLE",
13951 c
->name
, sym
->name
, &c
->loc
);
13955 /* Add the hidden deferred length field. */
13956 if (c
->ts
.type
== BT_CHARACTER
13957 && (c
->ts
.deferred
|| c
->attr
.pdt_string
)
13958 && !c
->attr
.function
13959 && !sym
->attr
.is_class
)
13961 char name
[GFC_MAX_SYMBOL_LEN
+9];
13962 gfc_component
*strlen
;
13963 sprintf (name
, "_%s_length", c
->name
);
13964 strlen
= gfc_find_component (sym
, name
, true, true, NULL
);
13965 if (strlen
== NULL
)
13967 if (!gfc_add_component (sym
, name
, &strlen
))
13969 strlen
->ts
.type
= BT_INTEGER
;
13970 strlen
->ts
.kind
= gfc_charlen_int_kind
;
13971 strlen
->attr
.access
= ACCESS_PRIVATE
;
13972 strlen
->attr
.artificial
= 1;
13976 if (c
->ts
.type
== BT_DERIVED
13977 && sym
->component_access
!= ACCESS_PRIVATE
13978 && gfc_check_symbol_access (sym
)
13979 && !is_sym_host_assoc (c
->ts
.u
.derived
, sym
->ns
)
13980 && !c
->ts
.u
.derived
->attr
.use_assoc
13981 && !gfc_check_symbol_access (c
->ts
.u
.derived
)
13982 && !gfc_notify_std (GFC_STD_F2003
, "the component %qs is a "
13983 "PRIVATE type and cannot be a component of "
13984 "%qs, which is PUBLIC at %L", c
->name
,
13985 sym
->name
, &sym
->declared_at
))
13988 if ((sym
->attr
.sequence
|| sym
->attr
.is_bind_c
) && c
->ts
.type
== BT_CLASS
)
13990 gfc_error ("Polymorphic component %s at %L in SEQUENCE or BIND(C) "
13991 "type %s", c
->name
, &c
->loc
, sym
->name
);
13995 if (sym
->attr
.sequence
)
13997 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.sequence
== 0)
13999 gfc_error ("Component %s of SEQUENCE type declared at %L does "
14000 "not have the SEQUENCE attribute",
14001 c
->ts
.u
.derived
->name
, &sym
->declared_at
);
14006 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.generic
)
14007 c
->ts
.u
.derived
= gfc_find_dt_in_generic (c
->ts
.u
.derived
);
14008 else if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
14009 && CLASS_DATA (c
)->ts
.u
.derived
->attr
.generic
)
14010 CLASS_DATA (c
)->ts
.u
.derived
14011 = gfc_find_dt_in_generic (CLASS_DATA (c
)->ts
.u
.derived
);
14013 /* If an allocatable component derived type is of the same type as
14014 the enclosing derived type, we need a vtable generating so that
14015 the __deallocate procedure is created. */
14016 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
14017 && c
->ts
.u
.derived
== sym
&& c
->attr
.allocatable
== 1)
14018 gfc_find_vtab (&c
->ts
);
14020 /* Ensure that all the derived type components are put on the
14021 derived type list; even in formal namespaces, where derived type
14022 pointer components might not have been declared. */
14023 if (c
->ts
.type
== BT_DERIVED
14025 && c
->ts
.u
.derived
->components
14027 && sym
!= c
->ts
.u
.derived
)
14028 add_dt_to_dt_list (c
->ts
.u
.derived
);
14030 if (!gfc_resolve_array_spec (c
->as
,
14031 !(c
->attr
.pointer
|| c
->attr
.proc_pointer
14032 || c
->attr
.allocatable
)))
14035 if (c
->initializer
&& !sym
->attr
.vtype
14036 && !c
->attr
.pdt_kind
&& !c
->attr
.pdt_len
14037 && !gfc_check_assign_symbol (sym
, c
, c
->initializer
))
14044 /* Be nice about the locus for a structure expression - show the locus of the
14045 first non-null sub-expression if we can. */
14048 cons_where (gfc_expr
*struct_expr
)
14050 gfc_constructor
*cons
;
14052 gcc_assert (struct_expr
&& struct_expr
->expr_type
== EXPR_STRUCTURE
);
14054 cons
= gfc_constructor_first (struct_expr
->value
.constructor
);
14055 for (; cons
; cons
= gfc_constructor_next (cons
))
14057 if (cons
->expr
&& cons
->expr
->expr_type
!= EXPR_NULL
)
14058 return &cons
->expr
->where
;
14061 return &struct_expr
->where
;
14064 /* Resolve the components of a structure type. Much less work than derived
14068 resolve_fl_struct (gfc_symbol
*sym
)
14071 gfc_expr
*init
= NULL
;
14074 /* Make sure UNIONs do not have overlapping initializers. */
14075 if (sym
->attr
.flavor
== FL_UNION
)
14077 for (c
= sym
->components
; c
; c
= c
->next
)
14079 if (init
&& c
->initializer
)
14081 gfc_error ("Conflicting initializers in union at %L and %L",
14082 cons_where (init
), cons_where (c
->initializer
));
14083 gfc_free_expr (c
->initializer
);
14084 c
->initializer
= NULL
;
14087 init
= c
->initializer
;
14092 for (c
= sym
->components
; c
; c
= c
->next
)
14093 if (!resolve_component (c
, sym
))
14099 if (sym
->components
)
14100 add_dt_to_dt_list (sym
);
14106 /* Resolve the components of a derived type. This does not have to wait until
14107 resolution stage, but can be done as soon as the dt declaration has been
14111 resolve_fl_derived0 (gfc_symbol
*sym
)
14113 gfc_symbol
* super_type
;
14115 gfc_formal_arglist
*f
;
14118 if (sym
->attr
.unlimited_polymorphic
)
14121 super_type
= gfc_get_derived_super_type (sym
);
14124 if (super_type
&& sym
->attr
.coarray_comp
&& !super_type
->attr
.coarray_comp
)
14126 gfc_error ("As extending type %qs at %L has a coarray component, "
14127 "parent type %qs shall also have one", sym
->name
,
14128 &sym
->declared_at
, super_type
->name
);
14132 /* Ensure the extended type gets resolved before we do. */
14133 if (super_type
&& !resolve_fl_derived0 (super_type
))
14136 /* An ABSTRACT type must be extensible. */
14137 if (sym
->attr
.abstract
&& !gfc_type_is_extensible (sym
))
14139 gfc_error ("Non-extensible derived-type %qs at %L must not be ABSTRACT",
14140 sym
->name
, &sym
->declared_at
);
14144 c
= (sym
->attr
.is_class
) ? sym
->components
->ts
.u
.derived
->components
14148 for ( ; c
!= NULL
; c
= c
->next
)
14149 if (!resolve_component (c
, sym
))
14155 /* Now add the caf token field, where needed. */
14156 if (flag_coarray
!= GFC_FCOARRAY_NONE
14157 && !sym
->attr
.is_class
&& !sym
->attr
.vtype
)
14159 for (c
= sym
->components
; c
; c
= c
->next
)
14160 if (!c
->attr
.dimension
&& !c
->attr
.codimension
14161 && (c
->attr
.allocatable
|| c
->attr
.pointer
))
14163 char name
[GFC_MAX_SYMBOL_LEN
+9];
14164 gfc_component
*token
;
14165 sprintf (name
, "_caf_%s", c
->name
);
14166 token
= gfc_find_component (sym
, name
, true, true, NULL
);
14169 if (!gfc_add_component (sym
, name
, &token
))
14171 token
->ts
.type
= BT_VOID
;
14172 token
->ts
.kind
= gfc_default_integer_kind
;
14173 token
->attr
.access
= ACCESS_PRIVATE
;
14174 token
->attr
.artificial
= 1;
14175 token
->attr
.caf_token
= 1;
14180 check_defined_assignments (sym
);
14182 if (!sym
->attr
.defined_assign_comp
&& super_type
)
14183 sym
->attr
.defined_assign_comp
14184 = super_type
->attr
.defined_assign_comp
;
14186 /* If this is a non-ABSTRACT type extending an ABSTRACT one, ensure that
14187 all DEFERRED bindings are overridden. */
14188 if (super_type
&& super_type
->attr
.abstract
&& !sym
->attr
.abstract
14189 && !sym
->attr
.is_class
14190 && !ensure_not_abstract (sym
, super_type
))
14193 /* Check that there is a component for every PDT parameter. */
14194 if (sym
->attr
.pdt_template
)
14196 for (f
= sym
->formal
; f
; f
= f
->next
)
14200 c
= gfc_find_component (sym
, f
->sym
->name
, true, true, NULL
);
14203 gfc_error ("Parameterized type %qs does not have a component "
14204 "corresponding to parameter %qs at %L", sym
->name
,
14205 f
->sym
->name
, &sym
->declared_at
);
14211 /* Add derived type to the derived type list. */
14212 add_dt_to_dt_list (sym
);
14218 /* The following procedure does the full resolution of a derived type,
14219 including resolution of all type-bound procedures (if present). In contrast
14220 to 'resolve_fl_derived0' this can only be done after the module has been
14221 parsed completely. */
14224 resolve_fl_derived (gfc_symbol
*sym
)
14226 gfc_symbol
*gen_dt
= NULL
;
14228 if (sym
->attr
.unlimited_polymorphic
)
14231 if (!sym
->attr
.is_class
)
14232 gfc_find_symbol (sym
->name
, sym
->ns
, 0, &gen_dt
);
14233 if (gen_dt
&& gen_dt
->generic
&& gen_dt
->generic
->next
14234 && (!gen_dt
->generic
->sym
->attr
.use_assoc
14235 || gen_dt
->generic
->sym
->module
!= gen_dt
->generic
->next
->sym
->module
)
14236 && !gfc_notify_std (GFC_STD_F2003
, "Generic name %qs of function "
14237 "%qs at %L being the same name as derived "
14238 "type at %L", sym
->name
,
14239 gen_dt
->generic
->sym
== sym
14240 ? gen_dt
->generic
->next
->sym
->name
14241 : gen_dt
->generic
->sym
->name
,
14242 gen_dt
->generic
->sym
== sym
14243 ? &gen_dt
->generic
->next
->sym
->declared_at
14244 : &gen_dt
->generic
->sym
->declared_at
,
14245 &sym
->declared_at
))
14248 if (sym
->components
== NULL
&& !sym
->attr
.zero_comp
&& !sym
->attr
.use_assoc
)
14250 gfc_error ("Derived type %qs at %L has not been declared",
14251 sym
->name
, &sym
->declared_at
);
14255 /* Resolve the finalizer procedures. */
14256 if (!gfc_resolve_finalizers (sym
, NULL
))
14259 if (sym
->attr
.is_class
&& sym
->ts
.u
.derived
== NULL
)
14261 /* Fix up incomplete CLASS symbols. */
14262 gfc_component
*data
= gfc_find_component (sym
, "_data", true, true, NULL
);
14263 gfc_component
*vptr
= gfc_find_component (sym
, "_vptr", true, true, NULL
);
14265 /* Nothing more to do for unlimited polymorphic entities. */
14266 if (data
->ts
.u
.derived
->attr
.unlimited_polymorphic
)
14268 else if (vptr
->ts
.u
.derived
== NULL
)
14270 gfc_symbol
*vtab
= gfc_find_derived_vtab (data
->ts
.u
.derived
);
14272 vptr
->ts
.u
.derived
= vtab
->ts
.u
.derived
;
14273 if (!resolve_fl_derived0 (vptr
->ts
.u
.derived
))
14278 if (!resolve_fl_derived0 (sym
))
14281 /* Resolve the type-bound procedures. */
14282 if (!resolve_typebound_procedures (sym
))
14285 /* Generate module vtables subject to their accessibility and their not
14286 being vtables or pdt templates. If this is not done class declarations
14287 in external procedures wind up with their own version and so SELECT TYPE
14288 fails because the vptrs do not have the same address. */
14289 if (gfc_option
.allow_std
& GFC_STD_F2003
14290 && sym
->ns
->proc_name
14291 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14292 && sym
->attr
.access
!= ACCESS_PRIVATE
14293 && !(sym
->attr
.use_assoc
|| sym
->attr
.vtype
|| sym
->attr
.pdt_template
))
14295 gfc_symbol
*vtab
= gfc_find_derived_vtab (sym
);
14296 gfc_set_sym_referenced (vtab
);
14304 resolve_fl_namelist (gfc_symbol
*sym
)
14309 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14311 /* Check again, the check in match only works if NAMELIST comes
14313 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SIZE
)
14315 gfc_error ("Assumed size array %qs in namelist %qs at %L is not "
14316 "allowed", nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14320 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SHAPE
14321 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14322 "with assumed shape in namelist %qs at %L",
14323 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14326 if (is_non_constant_shape_array (nl
->sym
)
14327 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14328 "with nonconstant shape in namelist %qs at %L",
14329 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14332 if (nl
->sym
->ts
.type
== BT_CHARACTER
14333 && (nl
->sym
->ts
.u
.cl
->length
== NULL
14334 || !gfc_is_constant_expr (nl
->sym
->ts
.u
.cl
->length
))
14335 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs with "
14336 "nonconstant character length in "
14337 "namelist %qs at %L", nl
->sym
->name
,
14338 sym
->name
, &sym
->declared_at
))
14343 /* Reject PRIVATE objects in a PUBLIC namelist. */
14344 if (gfc_check_symbol_access (sym
))
14346 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14348 if (!nl
->sym
->attr
.use_assoc
14349 && !is_sym_host_assoc (nl
->sym
, sym
->ns
)
14350 && !gfc_check_symbol_access (nl
->sym
))
14352 gfc_error ("NAMELIST object %qs was declared PRIVATE and "
14353 "cannot be member of PUBLIC namelist %qs at %L",
14354 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14358 if (nl
->sym
->ts
.type
== BT_DERIVED
14359 && (nl
->sym
->ts
.u
.derived
->attr
.alloc_comp
14360 || nl
->sym
->ts
.u
.derived
->attr
.pointer_comp
))
14362 if (!gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs in "
14363 "namelist %qs at %L with ALLOCATABLE "
14364 "or POINTER components", nl
->sym
->name
,
14365 sym
->name
, &sym
->declared_at
))
14370 /* Types with private components that came here by USE-association. */
14371 if (nl
->sym
->ts
.type
== BT_DERIVED
14372 && derived_inaccessible (nl
->sym
->ts
.u
.derived
))
14374 gfc_error ("NAMELIST object %qs has use-associated PRIVATE "
14375 "components and cannot be member of namelist %qs at %L",
14376 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14380 /* Types with private components that are defined in the same module. */
14381 if (nl
->sym
->ts
.type
== BT_DERIVED
14382 && !is_sym_host_assoc (nl
->sym
->ts
.u
.derived
, sym
->ns
)
14383 && nl
->sym
->ts
.u
.derived
->attr
.private_comp
)
14385 gfc_error ("NAMELIST object %qs has PRIVATE components and "
14386 "cannot be a member of PUBLIC namelist %qs at %L",
14387 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14394 /* 14.1.2 A module or internal procedure represent local entities
14395 of the same type as a namelist member and so are not allowed. */
14396 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14398 if (nl
->sym
->ts
.kind
!= 0 && nl
->sym
->attr
.flavor
== FL_VARIABLE
)
14401 if (nl
->sym
->attr
.function
&& nl
->sym
== nl
->sym
->result
)
14402 if ((nl
->sym
== sym
->ns
->proc_name
)
14404 (sym
->ns
->parent
&& nl
->sym
== sym
->ns
->parent
->proc_name
))
14409 gfc_find_symbol (nl
->sym
->name
, sym
->ns
, 1, &nlsym
);
14410 if (nlsym
&& nlsym
->attr
.flavor
== FL_PROCEDURE
)
14412 gfc_error ("PROCEDURE attribute conflicts with NAMELIST "
14413 "attribute in %qs at %L", nlsym
->name
,
14414 &sym
->declared_at
);
14421 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14422 nl
->sym
->attr
.asynchronous
= 1;
14429 resolve_fl_parameter (gfc_symbol
*sym
)
14431 /* A parameter array's shape needs to be constant. */
14432 if (sym
->as
!= NULL
14433 && (sym
->as
->type
== AS_DEFERRED
14434 || is_non_constant_shape_array (sym
)))
14436 gfc_error ("Parameter array %qs at %L cannot be automatic "
14437 "or of deferred shape", sym
->name
, &sym
->declared_at
);
14441 /* Constraints on deferred type parameter. */
14442 if (!deferred_requirements (sym
))
14445 /* Make sure a parameter that has been implicitly typed still
14446 matches the implicit type, since PARAMETER statements can precede
14447 IMPLICIT statements. */
14448 if (sym
->attr
.implicit_type
14449 && !gfc_compare_types (&sym
->ts
, gfc_get_default_type (sym
->name
,
14452 gfc_error ("Implicitly typed PARAMETER %qs at %L doesn't match a "
14453 "later IMPLICIT type", sym
->name
, &sym
->declared_at
);
14457 /* Make sure the types of derived parameters are consistent. This
14458 type checking is deferred until resolution because the type may
14459 refer to a derived type from the host. */
14460 if (sym
->ts
.type
== BT_DERIVED
14461 && !gfc_compare_types (&sym
->ts
, &sym
->value
->ts
))
14463 gfc_error ("Incompatible derived type in PARAMETER at %L",
14464 &sym
->value
->where
);
14468 /* F03:C509,C514. */
14469 if (sym
->ts
.type
== BT_CLASS
)
14471 gfc_error ("CLASS variable %qs at %L cannot have the PARAMETER attribute",
14472 sym
->name
, &sym
->declared_at
);
14480 /* Called by resolve_symbol to check PDTs. */
14483 resolve_pdt (gfc_symbol
* sym
)
14485 gfc_symbol
*derived
= NULL
;
14486 gfc_actual_arglist
*param
;
14488 bool const_len_exprs
= true;
14489 bool assumed_len_exprs
= false;
14490 symbol_attribute
*attr
;
14492 if (sym
->ts
.type
== BT_DERIVED
)
14494 derived
= sym
->ts
.u
.derived
;
14495 attr
= &(sym
->attr
);
14497 else if (sym
->ts
.type
== BT_CLASS
)
14499 derived
= CLASS_DATA (sym
)->ts
.u
.derived
;
14500 attr
= &(CLASS_DATA (sym
)->attr
);
14503 gcc_unreachable ();
14505 gcc_assert (derived
->attr
.pdt_type
);
14507 for (param
= sym
->param_list
; param
; param
= param
->next
)
14509 c
= gfc_find_component (derived
, param
->name
, false, true, NULL
);
14511 if (c
->attr
.pdt_kind
)
14514 if (param
->expr
&& !gfc_is_constant_expr (param
->expr
)
14515 && c
->attr
.pdt_len
)
14516 const_len_exprs
= false;
14517 else if (param
->spec_type
== SPEC_ASSUMED
)
14518 assumed_len_exprs
= true;
14520 if (param
->spec_type
== SPEC_DEFERRED
14521 && !attr
->allocatable
&& !attr
->pointer
)
14522 gfc_error ("The object %qs at %L has a deferred LEN "
14523 "parameter %qs and is neither allocatable "
14524 "nor a pointer", sym
->name
, &sym
->declared_at
,
14529 if (!const_len_exprs
14530 && (sym
->ns
->proc_name
->attr
.is_main_program
14531 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14532 || sym
->attr
.save
!= SAVE_NONE
))
14533 gfc_error ("The AUTOMATIC object %qs at %L must not have the "
14534 "SAVE attribute or be a variable declared in the "
14535 "main program, a module or a submodule(F08/C513)",
14536 sym
->name
, &sym
->declared_at
);
14538 if (assumed_len_exprs
&& !(sym
->attr
.dummy
14539 || sym
->attr
.select_type_temporary
|| sym
->attr
.associate_var
))
14540 gfc_error ("The object %qs at %L with ASSUMED type parameters "
14541 "must be a dummy or a SELECT TYPE selector(F08/4.2)",
14542 sym
->name
, &sym
->declared_at
);
14546 /* Do anything necessary to resolve a symbol. Right now, we just
14547 assume that an otherwise unknown symbol is a variable. This sort
14548 of thing commonly happens for symbols in module. */
14551 resolve_symbol (gfc_symbol
*sym
)
14553 int check_constant
, mp_flag
;
14554 gfc_symtree
*symtree
;
14555 gfc_symtree
*this_symtree
;
14558 symbol_attribute class_attr
;
14559 gfc_array_spec
*as
;
14560 bool saved_specification_expr
;
14566 /* No symbol will ever have union type; only components can be unions.
14567 Union type declaration symbols have type BT_UNKNOWN but flavor FL_UNION
14568 (just like derived type declaration symbols have flavor FL_DERIVED). */
14569 gcc_assert (sym
->ts
.type
!= BT_UNION
);
14571 /* Coarrayed polymorphic objects with allocatable or pointer components are
14572 yet unsupported for -fcoarray=lib. */
14573 if (flag_coarray
== GFC_FCOARRAY_LIB
&& sym
->ts
.type
== BT_CLASS
14574 && sym
->ts
.u
.derived
&& CLASS_DATA (sym
)
14575 && CLASS_DATA (sym
)->attr
.codimension
14576 && (CLASS_DATA (sym
)->ts
.u
.derived
->attr
.alloc_comp
14577 || CLASS_DATA (sym
)->ts
.u
.derived
->attr
.pointer_comp
))
14579 gfc_error ("Sorry, allocatable/pointer components in polymorphic (CLASS) "
14580 "type coarrays at %L are unsupported", &sym
->declared_at
);
14584 if (sym
->attr
.artificial
)
14587 if (sym
->attr
.unlimited_polymorphic
)
14590 if (sym
->attr
.flavor
== FL_UNKNOWN
14591 || (sym
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.intrinsic
14592 && !sym
->attr
.generic
&& !sym
->attr
.external
14593 && sym
->attr
.if_source
== IFSRC_UNKNOWN
14594 && sym
->ts
.type
== BT_UNKNOWN
))
14597 /* If we find that a flavorless symbol is an interface in one of the
14598 parent namespaces, find its symtree in this namespace, free the
14599 symbol and set the symtree to point to the interface symbol. */
14600 for (ns
= gfc_current_ns
->parent
; ns
; ns
= ns
->parent
)
14602 symtree
= gfc_find_symtree (ns
->sym_root
, sym
->name
);
14603 if (symtree
&& (symtree
->n
.sym
->generic
||
14604 (symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
14605 && sym
->ns
->construct_entities
)))
14607 this_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
14609 if (this_symtree
->n
.sym
== sym
)
14611 symtree
->n
.sym
->refs
++;
14612 gfc_release_symbol (sym
);
14613 this_symtree
->n
.sym
= symtree
->n
.sym
;
14619 /* Otherwise give it a flavor according to such attributes as
14621 if (sym
->attr
.flavor
== FL_UNKNOWN
&& sym
->attr
.external
== 0
14622 && sym
->attr
.intrinsic
== 0)
14623 sym
->attr
.flavor
= FL_VARIABLE
;
14624 else if (sym
->attr
.flavor
== FL_UNKNOWN
)
14626 sym
->attr
.flavor
= FL_PROCEDURE
;
14627 if (sym
->attr
.dimension
)
14628 sym
->attr
.function
= 1;
14632 if (sym
->attr
.external
&& sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.function
)
14633 gfc_add_function (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14635 if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
14636 && !resolve_procedure_interface (sym
))
14639 if (sym
->attr
.is_protected
&& !sym
->attr
.proc_pointer
14640 && (sym
->attr
.procedure
|| sym
->attr
.external
))
14642 if (sym
->attr
.external
)
14643 gfc_error ("PROTECTED attribute conflicts with EXTERNAL attribute "
14644 "at %L", &sym
->declared_at
);
14646 gfc_error ("PROCEDURE attribute conflicts with PROTECTED attribute "
14647 "at %L", &sym
->declared_at
);
14652 if (sym
->attr
.flavor
== FL_DERIVED
&& !resolve_fl_derived (sym
))
14655 else if ((sym
->attr
.flavor
== FL_STRUCT
|| sym
->attr
.flavor
== FL_UNION
)
14656 && !resolve_fl_struct (sym
))
14659 /* Symbols that are module procedures with results (functions) have
14660 the types and array specification copied for type checking in
14661 procedures that call them, as well as for saving to a module
14662 file. These symbols can't stand the scrutiny that their results
14664 mp_flag
= (sym
->result
!= NULL
&& sym
->result
!= sym
);
14666 /* Make sure that the intrinsic is consistent with its internal
14667 representation. This needs to be done before assigning a default
14668 type to avoid spurious warnings. */
14669 if (sym
->attr
.flavor
!= FL_MODULE
&& sym
->attr
.intrinsic
14670 && !gfc_resolve_intrinsic (sym
, &sym
->declared_at
))
14673 /* Resolve associate names. */
14675 resolve_assoc_var (sym
, true);
14677 /* Assign default type to symbols that need one and don't have one. */
14678 if (sym
->ts
.type
== BT_UNKNOWN
)
14680 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
)
14682 gfc_set_default_type (sym
, 1, NULL
);
14685 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.external
14686 && !sym
->attr
.function
&& !sym
->attr
.subroutine
14687 && gfc_get_default_type (sym
->name
, sym
->ns
)->type
== BT_UNKNOWN
)
14688 gfc_add_subroutine (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14690 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14692 /* The specific case of an external procedure should emit an error
14693 in the case that there is no implicit type. */
14696 if (!sym
->attr
.mixed_entry_master
)
14697 gfc_set_default_type (sym
, sym
->attr
.external
, NULL
);
14701 /* Result may be in another namespace. */
14702 resolve_symbol (sym
->result
);
14704 if (!sym
->result
->attr
.proc_pointer
)
14706 sym
->ts
= sym
->result
->ts
;
14707 sym
->as
= gfc_copy_array_spec (sym
->result
->as
);
14708 sym
->attr
.dimension
= sym
->result
->attr
.dimension
;
14709 sym
->attr
.pointer
= sym
->result
->attr
.pointer
;
14710 sym
->attr
.allocatable
= sym
->result
->attr
.allocatable
;
14711 sym
->attr
.contiguous
= sym
->result
->attr
.contiguous
;
14716 else if (mp_flag
&& sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14718 bool saved_specification_expr
= specification_expr
;
14719 specification_expr
= true;
14720 gfc_resolve_array_spec (sym
->result
->as
, false);
14721 specification_expr
= saved_specification_expr
;
14724 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
14726 as
= CLASS_DATA (sym
)->as
;
14727 class_attr
= CLASS_DATA (sym
)->attr
;
14728 class_attr
.pointer
= class_attr
.class_pointer
;
14732 class_attr
= sym
->attr
;
14737 if (sym
->attr
.contiguous
14738 && (!class_attr
.dimension
14739 || (as
->type
!= AS_ASSUMED_SHAPE
&& as
->type
!= AS_ASSUMED_RANK
14740 && !class_attr
.pointer
)))
14742 gfc_error ("%qs at %L has the CONTIGUOUS attribute but is not an "
14743 "array pointer or an assumed-shape or assumed-rank array",
14744 sym
->name
, &sym
->declared_at
);
14748 /* Assumed size arrays and assumed shape arrays must be dummy
14749 arguments. Array-spec's of implied-shape should have been resolved to
14750 AS_EXPLICIT already. */
14754 /* If AS_IMPLIED_SHAPE makes it to here, it must be a bad
14755 specification expression. */
14756 if (as
->type
== AS_IMPLIED_SHAPE
)
14759 for (i
=0; i
<as
->rank
; i
++)
14761 if (as
->lower
[i
] != NULL
&& as
->upper
[i
] == NULL
)
14763 gfc_error ("Bad specification for assumed size array at %L",
14764 &as
->lower
[i
]->where
);
14771 if (((as
->type
== AS_ASSUMED_SIZE
&& !as
->cp_was_assumed
)
14772 || as
->type
== AS_ASSUMED_SHAPE
)
14773 && !sym
->attr
.dummy
&& !sym
->attr
.select_type_temporary
)
14775 if (as
->type
== AS_ASSUMED_SIZE
)
14776 gfc_error ("Assumed size array at %L must be a dummy argument",
14777 &sym
->declared_at
);
14779 gfc_error ("Assumed shape array at %L must be a dummy argument",
14780 &sym
->declared_at
);
14783 /* TS 29113, C535a. */
14784 if (as
->type
== AS_ASSUMED_RANK
&& !sym
->attr
.dummy
14785 && !sym
->attr
.select_type_temporary
)
14787 gfc_error ("Assumed-rank array at %L must be a dummy argument",
14788 &sym
->declared_at
);
14791 if (as
->type
== AS_ASSUMED_RANK
14792 && (sym
->attr
.codimension
|| sym
->attr
.value
))
14794 gfc_error ("Assumed-rank array at %L may not have the VALUE or "
14795 "CODIMENSION attribute", &sym
->declared_at
);
14800 /* Make sure symbols with known intent or optional are really dummy
14801 variable. Because of ENTRY statement, this has to be deferred
14802 until resolution time. */
14804 if (!sym
->attr
.dummy
14805 && (sym
->attr
.optional
|| sym
->attr
.intent
!= INTENT_UNKNOWN
))
14807 gfc_error ("Symbol at %L is not a DUMMY variable", &sym
->declared_at
);
14811 if (sym
->attr
.value
&& !sym
->attr
.dummy
)
14813 gfc_error ("%qs at %L cannot have the VALUE attribute because "
14814 "it is not a dummy argument", sym
->name
, &sym
->declared_at
);
14818 if (sym
->attr
.value
&& sym
->ts
.type
== BT_CHARACTER
)
14820 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
14821 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
14823 gfc_error ("Character dummy variable %qs at %L with VALUE "
14824 "attribute must have constant length",
14825 sym
->name
, &sym
->declared_at
);
14829 if (sym
->ts
.is_c_interop
14830 && mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
14832 gfc_error ("C interoperable character dummy variable %qs at %L "
14833 "with VALUE attribute must have length one",
14834 sym
->name
, &sym
->declared_at
);
14839 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
14840 && sym
->ts
.u
.derived
->attr
.generic
)
14842 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
14843 if (!sym
->ts
.u
.derived
)
14845 gfc_error ("The derived type %qs at %L is of type %qs, "
14846 "which has not been defined", sym
->name
,
14847 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
14848 sym
->ts
.type
= BT_UNKNOWN
;
14853 /* Use the same constraints as TYPE(*), except for the type check
14854 and that only scalars and assumed-size arrays are permitted. */
14855 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
14857 if (!sym
->attr
.dummy
)
14859 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14860 "a dummy argument", sym
->name
, &sym
->declared_at
);
14864 if (sym
->ts
.type
!= BT_ASSUMED
&& sym
->ts
.type
!= BT_INTEGER
14865 && sym
->ts
.type
!= BT_REAL
&& sym
->ts
.type
!= BT_LOGICAL
14866 && sym
->ts
.type
!= BT_COMPLEX
)
14868 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14869 "of type TYPE(*) or of an numeric intrinsic type",
14870 sym
->name
, &sym
->declared_at
);
14874 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
14875 || sym
->attr
.pointer
|| sym
->attr
.value
)
14877 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
14878 "have the ALLOCATABLE, CODIMENSION, POINTER or VALUE "
14879 "attribute", sym
->name
, &sym
->declared_at
);
14883 if (sym
->attr
.intent
== INTENT_OUT
)
14885 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
14886 "have the INTENT(OUT) attribute",
14887 sym
->name
, &sym
->declared_at
);
14890 if (sym
->attr
.dimension
&& sym
->as
->type
!= AS_ASSUMED_SIZE
)
14892 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall "
14893 "either be a scalar or an assumed-size array",
14894 sym
->name
, &sym
->declared_at
);
14898 /* Set the type to TYPE(*) and add a dimension(*) to ensure
14899 NO_ARG_CHECK is correctly handled in trans*.c, e.g. with
14901 sym
->ts
.type
= BT_ASSUMED
;
14902 sym
->as
= gfc_get_array_spec ();
14903 sym
->as
->type
= AS_ASSUMED_SIZE
;
14905 sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
14907 else if (sym
->ts
.type
== BT_ASSUMED
)
14909 /* TS 29113, C407a. */
14910 if (!sym
->attr
.dummy
)
14912 gfc_error ("Assumed type of variable %s at %L is only permitted "
14913 "for dummy variables", sym
->name
, &sym
->declared_at
);
14916 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
14917 || sym
->attr
.pointer
|| sym
->attr
.value
)
14919 gfc_error ("Assumed-type variable %s at %L may not have the "
14920 "ALLOCATABLE, CODIMENSION, POINTER or VALUE attribute",
14921 sym
->name
, &sym
->declared_at
);
14924 if (sym
->attr
.intent
== INTENT_OUT
)
14926 gfc_error ("Assumed-type variable %s at %L may not have the "
14927 "INTENT(OUT) attribute",
14928 sym
->name
, &sym
->declared_at
);
14931 if (sym
->attr
.dimension
&& sym
->as
->type
== AS_EXPLICIT
)
14933 gfc_error ("Assumed-type variable %s at %L shall not be an "
14934 "explicit-shape array", sym
->name
, &sym
->declared_at
);
14939 /* If the symbol is marked as bind(c), that it is declared at module level
14940 scope and verify its type and kind. Do not do the latter for symbols
14941 that are implicitly typed because that is handled in
14942 gfc_set_default_type. Handle dummy arguments and procedure definitions
14943 separately. Also, anything that is use associated is not handled here
14944 but instead is handled in the module it is declared in. Finally, derived
14945 type definitions are allowed to be BIND(C) since that only implies that
14946 they're interoperable, and they are checked fully for interoperability
14947 when a variable is declared of that type. */
14948 if (sym
->attr
.is_bind_c
&& sym
->attr
.use_assoc
== 0
14949 && sym
->attr
.dummy
== 0 && sym
->attr
.flavor
!= FL_PROCEDURE
14950 && sym
->attr
.flavor
!= FL_DERIVED
)
14954 /* First, make sure the variable is declared at the
14955 module-level scope (J3/04-007, Section 15.3). */
14956 if (sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
&&
14957 sym
->attr
.in_common
== 0)
14959 gfc_error ("Variable %qs at %L cannot be BIND(C) because it "
14960 "is neither a COMMON block nor declared at the "
14961 "module level scope", sym
->name
, &(sym
->declared_at
));
14964 else if (sym
->ts
.type
== BT_CHARACTER
14965 && (sym
->ts
.u
.cl
== NULL
|| sym
->ts
.u
.cl
->length
== NULL
14966 || !gfc_is_constant_expr (sym
->ts
.u
.cl
->length
)
14967 || mpz_cmp_si (sym
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
14969 gfc_error ("BIND(C) Variable %qs at %L must have length one",
14970 sym
->name
, &sym
->declared_at
);
14973 else if (sym
->common_head
!= NULL
&& sym
->attr
.implicit_type
== 0)
14975 t
= verify_com_block_vars_c_interop (sym
->common_head
);
14977 else if (sym
->attr
.implicit_type
== 0)
14979 /* If type() declaration, we need to verify that the components
14980 of the given type are all C interoperable, etc. */
14981 if (sym
->ts
.type
== BT_DERIVED
&&
14982 sym
->ts
.u
.derived
->attr
.is_c_interop
!= 1)
14984 /* Make sure the user marked the derived type as BIND(C). If
14985 not, call the verify routine. This could print an error
14986 for the derived type more than once if multiple variables
14987 of that type are declared. */
14988 if (sym
->ts
.u
.derived
->attr
.is_bind_c
!= 1)
14989 verify_bind_c_derived_type (sym
->ts
.u
.derived
);
14993 /* Verify the variable itself as C interoperable if it
14994 is BIND(C). It is not possible for this to succeed if
14995 the verify_bind_c_derived_type failed, so don't have to handle
14996 any error returned by verify_bind_c_derived_type. */
14997 t
= verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
14998 sym
->common_block
);
15003 /* clear the is_bind_c flag to prevent reporting errors more than
15004 once if something failed. */
15005 sym
->attr
.is_bind_c
= 0;
15010 /* If a derived type symbol has reached this point, without its
15011 type being declared, we have an error. Notice that most
15012 conditions that produce undefined derived types have already
15013 been dealt with. However, the likes of:
15014 implicit type(t) (t) ..... call foo (t) will get us here if
15015 the type is not declared in the scope of the implicit
15016 statement. Change the type to BT_UNKNOWN, both because it is so
15017 and to prevent an ICE. */
15018 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15019 && sym
->ts
.u
.derived
->components
== NULL
15020 && !sym
->ts
.u
.derived
->attr
.zero_comp
)
15022 gfc_error ("The derived type %qs at %L is of type %qs, "
15023 "which has not been defined", sym
->name
,
15024 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15025 sym
->ts
.type
= BT_UNKNOWN
;
15029 /* Make sure that the derived type has been resolved and that the
15030 derived type is visible in the symbol's namespace, if it is a
15031 module function and is not PRIVATE. */
15032 if (sym
->ts
.type
== BT_DERIVED
15033 && sym
->ts
.u
.derived
->attr
.use_assoc
15034 && sym
->ns
->proc_name
15035 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15036 && !resolve_fl_derived (sym
->ts
.u
.derived
))
15039 /* Unless the derived-type declaration is use associated, Fortran 95
15040 does not allow public entries of private derived types.
15041 See 4.4.1 (F95) and 4.5.1.1 (F2003); and related interpretation
15042 161 in 95-006r3. */
15043 if (sym
->ts
.type
== BT_DERIVED
15044 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15045 && !sym
->ts
.u
.derived
->attr
.use_assoc
15046 && gfc_check_symbol_access (sym
)
15047 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
15048 && !gfc_notify_std (GFC_STD_F2003
, "PUBLIC %s %qs at %L of PRIVATE "
15049 "derived type %qs",
15050 (sym
->attr
.flavor
== FL_PARAMETER
)
15051 ? "parameter" : "variable",
15052 sym
->name
, &sym
->declared_at
,
15053 sym
->ts
.u
.derived
->name
))
15056 /* F2008, C1302. */
15057 if (sym
->ts
.type
== BT_DERIVED
15058 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15059 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
15060 || sym
->ts
.u
.derived
->attr
.lock_comp
)
15061 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15063 gfc_error ("Variable %s at %L of type LOCK_TYPE or with subcomponent of "
15064 "type LOCK_TYPE must be a coarray", sym
->name
,
15065 &sym
->declared_at
);
15069 /* TS18508, C702/C703. */
15070 if (sym
->ts
.type
== BT_DERIVED
15071 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15072 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
15073 || sym
->ts
.u
.derived
->attr
.event_comp
)
15074 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15076 gfc_error ("Variable %s at %L of type EVENT_TYPE or with subcomponent of "
15077 "type EVENT_TYPE must be a coarray", sym
->name
,
15078 &sym
->declared_at
);
15082 /* An assumed-size array with INTENT(OUT) shall not be of a type for which
15083 default initialization is defined (5.1.2.4.4). */
15084 if (sym
->ts
.type
== BT_DERIVED
15086 && sym
->attr
.intent
== INTENT_OUT
15088 && sym
->as
->type
== AS_ASSUMED_SIZE
)
15090 for (c
= sym
->ts
.u
.derived
->components
; c
; c
= c
->next
)
15092 if (c
->initializer
)
15094 gfc_error ("The INTENT(OUT) dummy argument %qs at %L is "
15095 "ASSUMED SIZE and so cannot have a default initializer",
15096 sym
->name
, &sym
->declared_at
);
15103 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15104 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.lock_comp
)
15106 gfc_error ("Dummy argument %qs at %L of LOCK_TYPE shall not be "
15107 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15112 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15113 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.event_comp
)
15115 gfc_error ("Dummy argument %qs at %L of EVENT_TYPE shall not be "
15116 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15121 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15122 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15123 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15124 || class_attr
.codimension
)
15125 && (sym
->attr
.result
|| sym
->result
== sym
))
15127 gfc_error ("Function result %qs at %L shall not be a coarray or have "
15128 "a coarray component", sym
->name
, &sym
->declared_at
);
15133 if (sym
->attr
.codimension
&& sym
->ts
.type
== BT_DERIVED
15134 && sym
->ts
.u
.derived
->ts
.is_iso_c
)
15136 gfc_error ("Variable %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
15137 "shall not be a coarray", sym
->name
, &sym
->declared_at
);
15142 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15143 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15144 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15145 && (class_attr
.codimension
|| class_attr
.pointer
|| class_attr
.dimension
15146 || class_attr
.allocatable
))
15148 gfc_error ("Variable %qs at %L with coarray component shall be a "
15149 "nonpointer, nonallocatable scalar, which is not a coarray",
15150 sym
->name
, &sym
->declared_at
);
15154 /* F2008, C526. The function-result case was handled above. */
15155 if (class_attr
.codimension
15156 && !(class_attr
.allocatable
|| sym
->attr
.dummy
|| sym
->attr
.save
15157 || sym
->attr
.select_type_temporary
15158 || sym
->attr
.associate_var
15159 || (sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15160 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15161 || sym
->ns
->proc_name
->attr
.is_main_program
15162 || sym
->attr
.function
|| sym
->attr
.result
|| sym
->attr
.use_assoc
))
15164 gfc_error ("Variable %qs at %L is a coarray and is not ALLOCATABLE, SAVE "
15165 "nor a dummy argument", sym
->name
, &sym
->declared_at
);
15169 else if (class_attr
.codimension
&& !sym
->attr
.select_type_temporary
15170 && !class_attr
.allocatable
&& as
&& as
->cotype
== AS_DEFERRED
)
15172 gfc_error ("Coarray variable %qs at %L shall not have codimensions with "
15173 "deferred shape", sym
->name
, &sym
->declared_at
);
15176 else if (class_attr
.codimension
&& class_attr
.allocatable
&& as
15177 && (as
->cotype
!= AS_DEFERRED
|| as
->type
!= AS_DEFERRED
))
15179 gfc_error ("Allocatable coarray variable %qs at %L must have "
15180 "deferred shape", sym
->name
, &sym
->declared_at
);
15185 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15186 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15187 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15188 || (class_attr
.codimension
&& class_attr
.allocatable
))
15189 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
)
15191 gfc_error ("Variable %qs at %L is INTENT(OUT) and can thus not be an "
15192 "allocatable coarray or have coarray components",
15193 sym
->name
, &sym
->declared_at
);
15197 if (class_attr
.codimension
&& sym
->attr
.dummy
15198 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.is_bind_c
)
15200 gfc_error ("Coarray dummy variable %qs at %L not allowed in BIND(C) "
15201 "procedure %qs", sym
->name
, &sym
->declared_at
,
15202 sym
->ns
->proc_name
->name
);
15206 if (sym
->ts
.type
== BT_LOGICAL
15207 && ((sym
->attr
.function
&& sym
->attr
.is_bind_c
&& sym
->result
== sym
)
15208 || ((sym
->attr
.dummy
|| sym
->attr
.result
) && sym
->ns
->proc_name
15209 && sym
->ns
->proc_name
->attr
.is_bind_c
)))
15212 for (i
= 0; gfc_logical_kinds
[i
].kind
; i
++)
15213 if (gfc_logical_kinds
[i
].kind
== sym
->ts
.kind
)
15215 if (!gfc_logical_kinds
[i
].c_bool
&& sym
->attr
.dummy
15216 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL dummy argument %qs at "
15217 "%L with non-C_Bool kind in BIND(C) procedure "
15218 "%qs", sym
->name
, &sym
->declared_at
,
15219 sym
->ns
->proc_name
->name
))
15221 else if (!gfc_logical_kinds
[i
].c_bool
15222 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL result variable "
15223 "%qs at %L with non-C_Bool kind in "
15224 "BIND(C) procedure %qs", sym
->name
,
15226 sym
->attr
.function
? sym
->name
15227 : sym
->ns
->proc_name
->name
))
15231 switch (sym
->attr
.flavor
)
15234 if (!resolve_fl_variable (sym
, mp_flag
))
15239 if (sym
->formal
&& !sym
->formal_ns
)
15241 /* Check that none of the arguments are a namelist. */
15242 gfc_formal_arglist
*formal
= sym
->formal
;
15244 for (; formal
; formal
= formal
->next
)
15245 if (formal
->sym
&& formal
->sym
->attr
.flavor
== FL_NAMELIST
)
15247 gfc_error ("Namelist %qs can not be an argument to "
15248 "subroutine or function at %L",
15249 formal
->sym
->name
, &sym
->declared_at
);
15254 if (!resolve_fl_procedure (sym
, mp_flag
))
15259 if (!resolve_fl_namelist (sym
))
15264 if (!resolve_fl_parameter (sym
))
15272 /* Resolve array specifier. Check as well some constraints
15273 on COMMON blocks. */
15275 check_constant
= sym
->attr
.in_common
&& !sym
->attr
.pointer
;
15277 /* Set the formal_arg_flag so that check_conflict will not throw
15278 an error for host associated variables in the specification
15279 expression for an array_valued function. */
15280 if (sym
->attr
.function
&& sym
->as
)
15281 formal_arg_flag
= true;
15283 saved_specification_expr
= specification_expr
;
15284 specification_expr
= true;
15285 gfc_resolve_array_spec (sym
->as
, check_constant
);
15286 specification_expr
= saved_specification_expr
;
15288 formal_arg_flag
= false;
15290 /* Resolve formal namespaces. */
15291 if (sym
->formal_ns
&& sym
->formal_ns
!= gfc_current_ns
15292 && !sym
->attr
.contained
&& !sym
->attr
.intrinsic
)
15293 gfc_resolve (sym
->formal_ns
);
15295 /* Make sure the formal namespace is present. */
15296 if (sym
->formal
&& !sym
->formal_ns
)
15298 gfc_formal_arglist
*formal
= sym
->formal
;
15299 while (formal
&& !formal
->sym
)
15300 formal
= formal
->next
;
15304 sym
->formal_ns
= formal
->sym
->ns
;
15305 if (sym
->ns
!= formal
->sym
->ns
)
15306 sym
->formal_ns
->refs
++;
15310 /* Check threadprivate restrictions. */
15311 if (sym
->attr
.threadprivate
&& !sym
->attr
.save
15312 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15313 && (!sym
->attr
.in_common
15314 && sym
->module
== NULL
15315 && (sym
->ns
->proc_name
== NULL
15316 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15317 gfc_error ("Threadprivate at %L isn't SAVEd", &sym
->declared_at
);
15319 /* Check omp declare target restrictions. */
15320 if (sym
->attr
.omp_declare_target
15321 && sym
->attr
.flavor
== FL_VARIABLE
15323 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15324 && (!sym
->attr
.in_common
15325 && sym
->module
== NULL
15326 && (sym
->ns
->proc_name
== NULL
15327 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15328 gfc_error ("!$OMP DECLARE TARGET variable %qs at %L isn't SAVEd",
15329 sym
->name
, &sym
->declared_at
);
15331 /* If we have come this far we can apply default-initializers, as
15332 described in 14.7.5, to those variables that have not already
15333 been assigned one. */
15334 if (sym
->ts
.type
== BT_DERIVED
15336 && !sym
->attr
.allocatable
15337 && !sym
->attr
.alloc_comp
)
15339 symbol_attribute
*a
= &sym
->attr
;
15341 if ((!a
->save
&& !a
->dummy
&& !a
->pointer
15342 && !a
->in_common
&& !a
->use_assoc
15344 && !((a
->function
|| a
->result
)
15346 || sym
->ts
.u
.derived
->attr
.alloc_comp
15347 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15348 && !(a
->function
&& sym
!= sym
->result
))
15349 || (a
->dummy
&& a
->intent
== INTENT_OUT
&& !a
->pointer
))
15350 apply_default_init (sym
);
15351 else if (a
->function
&& sym
->result
&& a
->access
!= ACCESS_PRIVATE
15352 && (sym
->ts
.u
.derived
->attr
.alloc_comp
15353 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15354 /* Mark the result symbol to be referenced, when it has allocatable
15356 sym
->result
->attr
.referenced
= 1;
15359 if (sym
->ts
.type
== BT_CLASS
&& sym
->ns
== gfc_current_ns
15360 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
15361 && !CLASS_DATA (sym
)->attr
.class_pointer
15362 && !CLASS_DATA (sym
)->attr
.allocatable
)
15363 apply_default_init (sym
);
15365 /* If this symbol has a type-spec, check it. */
15366 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
15367 || (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
))
15368 if (!resolve_typespec_used (&sym
->ts
, &sym
->declared_at
, sym
->name
))
15371 if (sym
->param_list
)
15376 /************* Resolve DATA statements *************/
15380 gfc_data_value
*vnode
;
15386 /* Advance the values structure to point to the next value in the data list. */
15389 next_data_value (void)
15391 while (mpz_cmp_ui (values
.left
, 0) == 0)
15394 if (values
.vnode
->next
== NULL
)
15397 values
.vnode
= values
.vnode
->next
;
15398 mpz_set (values
.left
, values
.vnode
->repeat
);
15406 check_data_variable (gfc_data_variable
*var
, locus
*where
)
15412 ar_type mark
= AR_UNKNOWN
;
15414 mpz_t section_index
[GFC_MAX_DIMENSIONS
];
15420 if (!gfc_resolve_expr (var
->expr
))
15424 mpz_init_set_si (offset
, 0);
15427 if (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
15428 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
15429 e
= e
->value
.function
.actual
->expr
;
15431 if (e
->expr_type
!= EXPR_VARIABLE
)
15432 gfc_internal_error ("check_data_variable(): Bad expression");
15434 sym
= e
->symtree
->n
.sym
;
15436 if (sym
->ns
->is_block_data
&& !sym
->attr
.in_common
)
15438 gfc_error ("BLOCK DATA element %qs at %L must be in COMMON",
15439 sym
->name
, &sym
->declared_at
);
15442 if (e
->ref
== NULL
&& sym
->as
)
15444 gfc_error ("DATA array %qs at %L must be specified in a previous"
15445 " declaration", sym
->name
, where
);
15449 has_pointer
= sym
->attr
.pointer
;
15451 if (gfc_is_coindexed (e
))
15453 gfc_error ("DATA element %qs at %L cannot have a coindex", sym
->name
,
15458 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15460 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.pointer
)
15464 && ref
->type
== REF_ARRAY
15465 && ref
->u
.ar
.type
!= AR_FULL
)
15467 gfc_error ("DATA element %qs at %L is a pointer and so must "
15468 "be a full array", sym
->name
, where
);
15473 if (e
->rank
== 0 || has_pointer
)
15475 mpz_init_set_ui (size
, 1);
15482 /* Find the array section reference. */
15483 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15485 if (ref
->type
!= REF_ARRAY
)
15487 if (ref
->u
.ar
.type
== AR_ELEMENT
)
15493 /* Set marks according to the reference pattern. */
15494 switch (ref
->u
.ar
.type
)
15502 /* Get the start position of array section. */
15503 gfc_get_section_index (ar
, section_index
, &offset
);
15508 gcc_unreachable ();
15511 if (!gfc_array_size (e
, &size
))
15513 gfc_error ("Nonconstant array section at %L in DATA statement",
15515 mpz_clear (offset
);
15522 while (mpz_cmp_ui (size
, 0) > 0)
15524 if (!next_data_value ())
15526 gfc_error ("DATA statement at %L has more variables than values",
15532 t
= gfc_check_assign (var
->expr
, values
.vnode
->expr
, 0);
15536 /* If we have more than one element left in the repeat count,
15537 and we have more than one element left in the target variable,
15538 then create a range assignment. */
15539 /* FIXME: Only done for full arrays for now, since array sections
15541 if (mark
== AR_FULL
&& ref
&& ref
->next
== NULL
15542 && mpz_cmp_ui (values
.left
, 1) > 0 && mpz_cmp_ui (size
, 1) > 0)
15546 if (mpz_cmp (size
, values
.left
) >= 0)
15548 mpz_init_set (range
, values
.left
);
15549 mpz_sub (size
, size
, values
.left
);
15550 mpz_set_ui (values
.left
, 0);
15554 mpz_init_set (range
, size
);
15555 mpz_sub (values
.left
, values
.left
, size
);
15556 mpz_set_ui (size
, 0);
15559 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15562 mpz_add (offset
, offset
, range
);
15569 /* Assign initial value to symbol. */
15572 mpz_sub_ui (values
.left
, values
.left
, 1);
15573 mpz_sub_ui (size
, size
, 1);
15575 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15580 if (mark
== AR_FULL
)
15581 mpz_add_ui (offset
, offset
, 1);
15583 /* Modify the array section indexes and recalculate the offset
15584 for next element. */
15585 else if (mark
== AR_SECTION
)
15586 gfc_advance_section (section_index
, ar
, &offset
);
15590 if (mark
== AR_SECTION
)
15592 for (i
= 0; i
< ar
->dimen
; i
++)
15593 mpz_clear (section_index
[i
]);
15597 mpz_clear (offset
);
15603 static bool traverse_data_var (gfc_data_variable
*, locus
*);
15605 /* Iterate over a list of elements in a DATA statement. */
15608 traverse_data_list (gfc_data_variable
*var
, locus
*where
)
15611 iterator_stack frame
;
15612 gfc_expr
*e
, *start
, *end
, *step
;
15613 bool retval
= true;
15615 mpz_init (frame
.value
);
15618 start
= gfc_copy_expr (var
->iter
.start
);
15619 end
= gfc_copy_expr (var
->iter
.end
);
15620 step
= gfc_copy_expr (var
->iter
.step
);
15622 if (!gfc_simplify_expr (start
, 1)
15623 || start
->expr_type
!= EXPR_CONSTANT
)
15625 gfc_error ("start of implied-do loop at %L could not be "
15626 "simplified to a constant value", &start
->where
);
15630 if (!gfc_simplify_expr (end
, 1)
15631 || end
->expr_type
!= EXPR_CONSTANT
)
15633 gfc_error ("end of implied-do loop at %L could not be "
15634 "simplified to a constant value", &start
->where
);
15638 if (!gfc_simplify_expr (step
, 1)
15639 || step
->expr_type
!= EXPR_CONSTANT
)
15641 gfc_error ("step of implied-do loop at %L could not be "
15642 "simplified to a constant value", &start
->where
);
15647 mpz_set (trip
, end
->value
.integer
);
15648 mpz_sub (trip
, trip
, start
->value
.integer
);
15649 mpz_add (trip
, trip
, step
->value
.integer
);
15651 mpz_div (trip
, trip
, step
->value
.integer
);
15653 mpz_set (frame
.value
, start
->value
.integer
);
15655 frame
.prev
= iter_stack
;
15656 frame
.variable
= var
->iter
.var
->symtree
;
15657 iter_stack
= &frame
;
15659 while (mpz_cmp_ui (trip
, 0) > 0)
15661 if (!traverse_data_var (var
->list
, where
))
15667 e
= gfc_copy_expr (var
->expr
);
15668 if (!gfc_simplify_expr (e
, 1))
15675 mpz_add (frame
.value
, frame
.value
, step
->value
.integer
);
15677 mpz_sub_ui (trip
, trip
, 1);
15681 mpz_clear (frame
.value
);
15684 gfc_free_expr (start
);
15685 gfc_free_expr (end
);
15686 gfc_free_expr (step
);
15688 iter_stack
= frame
.prev
;
15693 /* Type resolve variables in the variable list of a DATA statement. */
15696 traverse_data_var (gfc_data_variable
*var
, locus
*where
)
15700 for (; var
; var
= var
->next
)
15702 if (var
->expr
== NULL
)
15703 t
= traverse_data_list (var
, where
);
15705 t
= check_data_variable (var
, where
);
15715 /* Resolve the expressions and iterators associated with a data statement.
15716 This is separate from the assignment checking because data lists should
15717 only be resolved once. */
15720 resolve_data_variables (gfc_data_variable
*d
)
15722 for (; d
; d
= d
->next
)
15724 if (d
->list
== NULL
)
15726 if (!gfc_resolve_expr (d
->expr
))
15731 if (!gfc_resolve_iterator (&d
->iter
, false, true))
15734 if (!resolve_data_variables (d
->list
))
15743 /* Resolve a single DATA statement. We implement this by storing a pointer to
15744 the value list into static variables, and then recursively traversing the
15745 variables list, expanding iterators and such. */
15748 resolve_data (gfc_data
*d
)
15751 if (!resolve_data_variables (d
->var
))
15754 values
.vnode
= d
->value
;
15755 if (d
->value
== NULL
)
15756 mpz_set_ui (values
.left
, 0);
15758 mpz_set (values
.left
, d
->value
->repeat
);
15760 if (!traverse_data_var (d
->var
, &d
->where
))
15763 /* At this point, we better not have any values left. */
15765 if (next_data_value ())
15766 gfc_error ("DATA statement at %L has more values than variables",
15771 /* 12.6 Constraint: In a pure subprogram any variable which is in common or
15772 accessed by host or use association, is a dummy argument to a pure function,
15773 is a dummy argument with INTENT (IN) to a pure subroutine, or an object that
15774 is storage associated with any such variable, shall not be used in the
15775 following contexts: (clients of this function). */
15777 /* Determines if a variable is not 'pure', i.e., not assignable within a pure
15778 procedure. Returns zero if assignment is OK, nonzero if there is a
15781 gfc_impure_variable (gfc_symbol
*sym
)
15786 if (sym
->attr
.use_assoc
|| sym
->attr
.in_common
)
15789 /* Check if the symbol's ns is inside the pure procedure. */
15790 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15794 if (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.function
)
15798 proc
= sym
->ns
->proc_name
;
15799 if (sym
->attr
.dummy
15800 && ((proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_IN
)
15801 || proc
->attr
.function
))
15804 /* TODO: Sort out what can be storage associated, if anything, and include
15805 it here. In principle equivalences should be scanned but it does not
15806 seem to be possible to storage associate an impure variable this way. */
15811 /* Test whether a symbol is pure or not. For a NULL pointer, checks if the
15812 current namespace is inside a pure procedure. */
15815 gfc_pure (gfc_symbol
*sym
)
15817 symbol_attribute attr
;
15822 /* Check if the current namespace or one of its parents
15823 belongs to a pure procedure. */
15824 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15826 sym
= ns
->proc_name
;
15830 if (attr
.flavor
== FL_PROCEDURE
&& attr
.pure
)
15838 return attr
.flavor
== FL_PROCEDURE
&& attr
.pure
;
15842 /* Test whether a symbol is implicitly pure or not. For a NULL pointer,
15843 checks if the current namespace is implicitly pure. Note that this
15844 function returns false for a PURE procedure. */
15847 gfc_implicit_pure (gfc_symbol
*sym
)
15853 /* Check if the current procedure is implicit_pure. Walk up
15854 the procedure list until we find a procedure. */
15855 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15857 sym
= ns
->proc_name
;
15861 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15866 return sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.implicit_pure
15867 && !sym
->attr
.pure
;
15872 gfc_unset_implicit_pure (gfc_symbol
*sym
)
15878 /* Check if the current procedure is implicit_pure. Walk up
15879 the procedure list until we find a procedure. */
15880 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15882 sym
= ns
->proc_name
;
15886 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15891 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15892 sym
->attr
.implicit_pure
= 0;
15894 sym
->attr
.pure
= 0;
15898 /* Test whether the current procedure is elemental or not. */
15901 gfc_elemental (gfc_symbol
*sym
)
15903 symbol_attribute attr
;
15906 sym
= gfc_current_ns
->proc_name
;
15911 return attr
.flavor
== FL_PROCEDURE
&& attr
.elemental
;
15915 /* Warn about unused labels. */
15918 warn_unused_fortran_label (gfc_st_label
*label
)
15923 warn_unused_fortran_label (label
->left
);
15925 if (label
->defined
== ST_LABEL_UNKNOWN
)
15928 switch (label
->referenced
)
15930 case ST_LABEL_UNKNOWN
:
15931 gfc_warning (OPT_Wunused_label
, "Label %d at %L defined but not used",
15932 label
->value
, &label
->where
);
15935 case ST_LABEL_BAD_TARGET
:
15936 gfc_warning (OPT_Wunused_label
,
15937 "Label %d at %L defined but cannot be used",
15938 label
->value
, &label
->where
);
15945 warn_unused_fortran_label (label
->right
);
15949 /* Returns the sequence type of a symbol or sequence. */
15952 sequence_type (gfc_typespec ts
)
15961 if (ts
.u
.derived
->components
== NULL
)
15962 return SEQ_NONDEFAULT
;
15964 result
= sequence_type (ts
.u
.derived
->components
->ts
);
15965 for (c
= ts
.u
.derived
->components
->next
; c
; c
= c
->next
)
15966 if (sequence_type (c
->ts
) != result
)
15972 if (ts
.kind
!= gfc_default_character_kind
)
15973 return SEQ_NONDEFAULT
;
15975 return SEQ_CHARACTER
;
15978 if (ts
.kind
!= gfc_default_integer_kind
)
15979 return SEQ_NONDEFAULT
;
15981 return SEQ_NUMERIC
;
15984 if (!(ts
.kind
== gfc_default_real_kind
15985 || ts
.kind
== gfc_default_double_kind
))
15986 return SEQ_NONDEFAULT
;
15988 return SEQ_NUMERIC
;
15991 if (ts
.kind
!= gfc_default_complex_kind
)
15992 return SEQ_NONDEFAULT
;
15994 return SEQ_NUMERIC
;
15997 if (ts
.kind
!= gfc_default_logical_kind
)
15998 return SEQ_NONDEFAULT
;
16000 return SEQ_NUMERIC
;
16003 return SEQ_NONDEFAULT
;
16008 /* Resolve derived type EQUIVALENCE object. */
16011 resolve_equivalence_derived (gfc_symbol
*derived
, gfc_symbol
*sym
, gfc_expr
*e
)
16013 gfc_component
*c
= derived
->components
;
16018 /* Shall not be an object of nonsequence derived type. */
16019 if (!derived
->attr
.sequence
)
16021 gfc_error ("Derived type variable %qs at %L must have SEQUENCE "
16022 "attribute to be an EQUIVALENCE object", sym
->name
,
16027 /* Shall not have allocatable components. */
16028 if (derived
->attr
.alloc_comp
)
16030 gfc_error ("Derived type variable %qs at %L cannot have ALLOCATABLE "
16031 "components to be an EQUIVALENCE object",sym
->name
,
16036 if (sym
->attr
.in_common
&& gfc_has_default_initializer (sym
->ts
.u
.derived
))
16038 gfc_error ("Derived type variable %qs at %L with default "
16039 "initialization cannot be in EQUIVALENCE with a variable "
16040 "in COMMON", sym
->name
, &e
->where
);
16044 for (; c
; c
= c
->next
)
16046 if (gfc_bt_struct (c
->ts
.type
)
16047 && (!resolve_equivalence_derived(c
->ts
.u
.derived
, sym
, e
)))
16050 /* Shall not be an object of sequence derived type containing a pointer
16051 in the structure. */
16052 if (c
->attr
.pointer
)
16054 gfc_error ("Derived type variable %qs at %L with pointer "
16055 "component(s) cannot be an EQUIVALENCE object",
16056 sym
->name
, &e
->where
);
16064 /* Resolve equivalence object.
16065 An EQUIVALENCE object shall not be a dummy argument, a pointer, a target,
16066 an allocatable array, an object of nonsequence derived type, an object of
16067 sequence derived type containing a pointer at any level of component
16068 selection, an automatic object, a function name, an entry name, a result
16069 name, a named constant, a structure component, or a subobject of any of
16070 the preceding objects. A substring shall not have length zero. A
16071 derived type shall not have components with default initialization nor
16072 shall two objects of an equivalence group be initialized.
16073 Either all or none of the objects shall have an protected attribute.
16074 The simple constraints are done in symbol.c(check_conflict) and the rest
16075 are implemented here. */
16078 resolve_equivalence (gfc_equiv
*eq
)
16081 gfc_symbol
*first_sym
;
16084 locus
*last_where
= NULL
;
16085 seq_type eq_type
, last_eq_type
;
16086 gfc_typespec
*last_ts
;
16087 int object
, cnt_protected
;
16090 last_ts
= &eq
->expr
->symtree
->n
.sym
->ts
;
16092 first_sym
= eq
->expr
->symtree
->n
.sym
;
16096 for (object
= 1; eq
; eq
= eq
->eq
, object
++)
16100 e
->ts
= e
->symtree
->n
.sym
->ts
;
16101 /* match_varspec might not know yet if it is seeing
16102 array reference or substring reference, as it doesn't
16104 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
)
16106 gfc_ref
*ref
= e
->ref
;
16107 sym
= e
->symtree
->n
.sym
;
16109 if (sym
->attr
.dimension
)
16111 ref
->u
.ar
.as
= sym
->as
;
16115 /* For substrings, convert REF_ARRAY into REF_SUBSTRING. */
16116 if (e
->ts
.type
== BT_CHARACTER
16118 && ref
->type
== REF_ARRAY
16119 && ref
->u
.ar
.dimen
== 1
16120 && ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
16121 && ref
->u
.ar
.stride
[0] == NULL
)
16123 gfc_expr
*start
= ref
->u
.ar
.start
[0];
16124 gfc_expr
*end
= ref
->u
.ar
.end
[0];
16127 /* Optimize away the (:) reference. */
16128 if (start
== NULL
&& end
== NULL
)
16131 e
->ref
= ref
->next
;
16133 e
->ref
->next
= ref
->next
;
16138 ref
->type
= REF_SUBSTRING
;
16140 start
= gfc_get_int_expr (gfc_charlen_int_kind
,
16142 ref
->u
.ss
.start
= start
;
16143 if (end
== NULL
&& e
->ts
.u
.cl
)
16144 end
= gfc_copy_expr (e
->ts
.u
.cl
->length
);
16145 ref
->u
.ss
.end
= end
;
16146 ref
->u
.ss
.length
= e
->ts
.u
.cl
;
16153 /* Any further ref is an error. */
16156 gcc_assert (ref
->type
== REF_ARRAY
);
16157 gfc_error ("Syntax error in EQUIVALENCE statement at %L",
16163 if (!gfc_resolve_expr (e
))
16166 sym
= e
->symtree
->n
.sym
;
16168 if (sym
->attr
.is_protected
)
16170 if (cnt_protected
> 0 && cnt_protected
!= object
)
16172 gfc_error ("Either all or none of the objects in the "
16173 "EQUIVALENCE set at %L shall have the "
16174 "PROTECTED attribute",
16179 /* Shall not equivalence common block variables in a PURE procedure. */
16180 if (sym
->ns
->proc_name
16181 && sym
->ns
->proc_name
->attr
.pure
16182 && sym
->attr
.in_common
)
16184 /* Need to check for symbols that may have entered the pure
16185 procedure via a USE statement. */
16186 bool saw_sym
= false;
16187 if (sym
->ns
->use_stmts
)
16190 for (r
= sym
->ns
->use_stmts
->rename
; r
; r
= r
->next
)
16191 if (strcmp(r
->use_name
, sym
->name
) == 0) saw_sym
= true;
16197 gfc_error ("COMMON block member %qs at %L cannot be an "
16198 "EQUIVALENCE object in the pure procedure %qs",
16199 sym
->name
, &e
->where
, sym
->ns
->proc_name
->name
);
16203 /* Shall not be a named constant. */
16204 if (e
->expr_type
== EXPR_CONSTANT
)
16206 gfc_error ("Named constant %qs at %L cannot be an EQUIVALENCE "
16207 "object", sym
->name
, &e
->where
);
16211 if (e
->ts
.type
== BT_DERIVED
16212 && !resolve_equivalence_derived (e
->ts
.u
.derived
, sym
, e
))
16215 /* Check that the types correspond correctly:
16217 A numeric sequence structure may be equivalenced to another sequence
16218 structure, an object of default integer type, default real type, double
16219 precision real type, default logical type such that components of the
16220 structure ultimately only become associated to objects of the same
16221 kind. A character sequence structure may be equivalenced to an object
16222 of default character kind or another character sequence structure.
16223 Other objects may be equivalenced only to objects of the same type and
16224 kind parameters. */
16226 /* Identical types are unconditionally OK. */
16227 if (object
== 1 || gfc_compare_types (last_ts
, &sym
->ts
))
16228 goto identical_types
;
16230 last_eq_type
= sequence_type (*last_ts
);
16231 eq_type
= sequence_type (sym
->ts
);
16233 /* Since the pair of objects is not of the same type, mixed or
16234 non-default sequences can be rejected. */
16236 msg
= "Sequence %s with mixed components in EQUIVALENCE "
16237 "statement at %L with different type objects";
16239 && last_eq_type
== SEQ_MIXED
16240 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16241 || (eq_type
== SEQ_MIXED
16242 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16245 msg
= "Non-default type object or sequence %s in EQUIVALENCE "
16246 "statement at %L with objects of different type";
16248 && last_eq_type
== SEQ_NONDEFAULT
16249 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16250 || (eq_type
== SEQ_NONDEFAULT
16251 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16254 msg
="Non-CHARACTER object %qs in default CHARACTER "
16255 "EQUIVALENCE statement at %L";
16256 if (last_eq_type
== SEQ_CHARACTER
16257 && eq_type
!= SEQ_CHARACTER
16258 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16261 msg
="Non-NUMERIC object %qs in default NUMERIC "
16262 "EQUIVALENCE statement at %L";
16263 if (last_eq_type
== SEQ_NUMERIC
16264 && eq_type
!= SEQ_NUMERIC
16265 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16270 last_where
= &e
->where
;
16275 /* Shall not be an automatic array. */
16276 if (e
->ref
->type
== REF_ARRAY
16277 && !gfc_resolve_array_spec (e
->ref
->u
.ar
.as
, 1))
16279 gfc_error ("Array %qs at %L with non-constant bounds cannot be "
16280 "an EQUIVALENCE object", sym
->name
, &e
->where
);
16287 /* Shall not be a structure component. */
16288 if (r
->type
== REF_COMPONENT
)
16290 gfc_error ("Structure component %qs at %L cannot be an "
16291 "EQUIVALENCE object",
16292 r
->u
.c
.component
->name
, &e
->where
);
16296 /* A substring shall not have length zero. */
16297 if (r
->type
== REF_SUBSTRING
)
16299 if (compare_bound (r
->u
.ss
.start
, r
->u
.ss
.end
) == CMP_GT
)
16301 gfc_error ("Substring at %L has length zero",
16302 &r
->u
.ss
.start
->where
);
16312 /* Function called by resolve_fntype to flag other symbol used in the
16313 length type parameter specification of function resuls. */
16316 flag_fn_result_spec (gfc_expr
*expr
,
16318 int *f ATTRIBUTE_UNUSED
)
16323 if (expr
->expr_type
== EXPR_VARIABLE
)
16325 s
= expr
->symtree
->n
.sym
;
16326 for (ns
= s
->ns
; ns
; ns
= ns
->parent
)
16332 gfc_error ("Self reference in character length expression "
16333 "for %qs at %L", sym
->name
, &expr
->where
);
16337 if (!s
->fn_result_spec
16338 && s
->attr
.flavor
== FL_PARAMETER
)
16340 /* Function contained in a module.... */
16341 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_MODULE
)
16344 s
->fn_result_spec
= 1;
16345 /* Make sure that this symbol is translated as a module
16347 st
= gfc_get_unique_symtree (ns
);
16351 /* ... which is use associated and called. */
16352 else if (s
->attr
.use_assoc
|| s
->attr
.used_in_submodule
16354 /* External function matched with an interface. */
16357 && s
->ns
->proc_name
->attr
.if_source
== IFSRC_DECL
)
16358 || s
->ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16359 && s
->ns
->proc_name
->attr
.function
))
16360 s
->fn_result_spec
= 1;
16367 /* Resolve function and ENTRY types, issue diagnostics if needed. */
16370 resolve_fntype (gfc_namespace
*ns
)
16372 gfc_entry_list
*el
;
16375 if (ns
->proc_name
== NULL
|| !ns
->proc_name
->attr
.function
)
16378 /* If there are any entries, ns->proc_name is the entry master
16379 synthetic symbol and ns->entries->sym actual FUNCTION symbol. */
16381 sym
= ns
->entries
->sym
;
16383 sym
= ns
->proc_name
;
16384 if (sym
->result
== sym
16385 && sym
->ts
.type
== BT_UNKNOWN
16386 && !gfc_set_default_type (sym
, 0, NULL
)
16387 && !sym
->attr
.untyped
)
16389 gfc_error ("Function %qs at %L has no IMPLICIT type",
16390 sym
->name
, &sym
->declared_at
);
16391 sym
->attr
.untyped
= 1;
16394 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->ts
.u
.derived
->attr
.use_assoc
16395 && !sym
->attr
.contained
16396 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
16397 && gfc_check_symbol_access (sym
))
16399 gfc_notify_std (GFC_STD_F2003
, "PUBLIC function %qs at "
16400 "%L of PRIVATE type %qs", sym
->name
,
16401 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
16405 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
16407 if (el
->sym
->result
== el
->sym
16408 && el
->sym
->ts
.type
== BT_UNKNOWN
16409 && !gfc_set_default_type (el
->sym
, 0, NULL
)
16410 && !el
->sym
->attr
.untyped
)
16412 gfc_error ("ENTRY %qs at %L has no IMPLICIT type",
16413 el
->sym
->name
, &el
->sym
->declared_at
);
16414 el
->sym
->attr
.untyped
= 1;
16418 if (sym
->ts
.type
== BT_CHARACTER
)
16419 gfc_traverse_expr (sym
->ts
.u
.cl
->length
, sym
, flag_fn_result_spec
, 0);
16423 /* 12.3.2.1.1 Defined operators. */
16426 check_uop_procedure (gfc_symbol
*sym
, locus where
)
16428 gfc_formal_arglist
*formal
;
16430 if (!sym
->attr
.function
)
16432 gfc_error ("User operator procedure %qs at %L must be a FUNCTION",
16433 sym
->name
, &where
);
16437 if (sym
->ts
.type
== BT_CHARACTER
16438 && !((sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
) || sym
->ts
.deferred
)
16439 && !(sym
->result
&& ((sym
->result
->ts
.u
.cl
16440 && sym
->result
->ts
.u
.cl
->length
) || sym
->result
->ts
.deferred
)))
16442 gfc_error ("User operator procedure %qs at %L cannot be assumed "
16443 "character length", sym
->name
, &where
);
16447 formal
= gfc_sym_get_dummy_args (sym
);
16448 if (!formal
|| !formal
->sym
)
16450 gfc_error ("User operator procedure %qs at %L must have at least "
16451 "one argument", sym
->name
, &where
);
16455 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16457 gfc_error ("First argument of operator interface at %L must be "
16458 "INTENT(IN)", &where
);
16462 if (formal
->sym
->attr
.optional
)
16464 gfc_error ("First argument of operator interface at %L cannot be "
16465 "optional", &where
);
16469 formal
= formal
->next
;
16470 if (!formal
|| !formal
->sym
)
16473 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16475 gfc_error ("Second argument of operator interface at %L must be "
16476 "INTENT(IN)", &where
);
16480 if (formal
->sym
->attr
.optional
)
16482 gfc_error ("Second argument of operator interface at %L cannot be "
16483 "optional", &where
);
16489 gfc_error ("Operator interface at %L must have, at most, two "
16490 "arguments", &where
);
16498 gfc_resolve_uops (gfc_symtree
*symtree
)
16500 gfc_interface
*itr
;
16502 if (symtree
== NULL
)
16505 gfc_resolve_uops (symtree
->left
);
16506 gfc_resolve_uops (symtree
->right
);
16508 for (itr
= symtree
->n
.uop
->op
; itr
; itr
= itr
->next
)
16509 check_uop_procedure (itr
->sym
, itr
->sym
->declared_at
);
16513 /* Examine all of the expressions associated with a program unit,
16514 assign types to all intermediate expressions, make sure that all
16515 assignments are to compatible types and figure out which names
16516 refer to which functions or subroutines. It doesn't check code
16517 block, which is handled by gfc_resolve_code. */
16520 resolve_types (gfc_namespace
*ns
)
16526 gfc_namespace
* old_ns
= gfc_current_ns
;
16528 if (ns
->types_resolved
)
16531 /* Check that all IMPLICIT types are ok. */
16532 if (!ns
->seen_implicit_none
)
16535 for (letter
= 0; letter
!= GFC_LETTERS
; ++letter
)
16536 if (ns
->set_flag
[letter
]
16537 && !resolve_typespec_used (&ns
->default_type
[letter
],
16538 &ns
->implicit_loc
[letter
], NULL
))
16542 gfc_current_ns
= ns
;
16544 resolve_entries (ns
);
16546 resolve_common_vars (&ns
->blank_common
, false);
16547 resolve_common_blocks (ns
->common_root
);
16549 resolve_contained_functions (ns
);
16551 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
16552 && ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16553 resolve_formal_arglist (ns
->proc_name
);
16555 gfc_traverse_ns (ns
, resolve_bind_c_derived_types
);
16557 for (cl
= ns
->cl_list
; cl
; cl
= cl
->next
)
16558 resolve_charlen (cl
);
16560 gfc_traverse_ns (ns
, resolve_symbol
);
16562 resolve_fntype (ns
);
16564 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16566 if (gfc_pure (ns
->proc_name
) && !gfc_pure (n
->proc_name
))
16567 gfc_error ("Contained procedure %qs at %L of a PURE procedure must "
16568 "also be PURE", n
->proc_name
->name
,
16569 &n
->proc_name
->declared_at
);
16575 gfc_do_concurrent_flag
= 0;
16576 gfc_check_interfaces (ns
);
16578 gfc_traverse_ns (ns
, resolve_values
);
16584 for (d
= ns
->data
; d
; d
= d
->next
)
16588 gfc_traverse_ns (ns
, gfc_formalize_init_value
);
16590 gfc_traverse_ns (ns
, gfc_verify_binding_labels
);
16592 for (eq
= ns
->equiv
; eq
; eq
= eq
->next
)
16593 resolve_equivalence (eq
);
16595 /* Warn about unused labels. */
16596 if (warn_unused_label
)
16597 warn_unused_fortran_label (ns
->st_labels
);
16599 gfc_resolve_uops (ns
->uop_root
);
16601 gfc_traverse_ns (ns
, gfc_verify_DTIO_procedures
);
16603 gfc_resolve_omp_declare_simd (ns
);
16605 gfc_resolve_omp_udrs (ns
->omp_udr_root
);
16607 ns
->types_resolved
= 1;
16609 gfc_current_ns
= old_ns
;
16613 /* Call gfc_resolve_code recursively. */
16616 resolve_codes (gfc_namespace
*ns
)
16619 bitmap_obstack old_obstack
;
16621 if (ns
->resolved
== 1)
16624 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16627 gfc_current_ns
= ns
;
16629 /* Don't clear 'cs_base' if this is the namespace of a BLOCK construct. */
16630 if (!(ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_LABEL
))
16633 /* Set to an out of range value. */
16634 current_entry_id
= -1;
16636 old_obstack
= labels_obstack
;
16637 bitmap_obstack_initialize (&labels_obstack
);
16639 gfc_resolve_oacc_declare (ns
);
16640 gfc_resolve_omp_local_vars (ns
);
16641 gfc_resolve_code (ns
->code
, ns
);
16643 bitmap_obstack_release (&labels_obstack
);
16644 labels_obstack
= old_obstack
;
16648 /* This function is called after a complete program unit has been compiled.
16649 Its purpose is to examine all of the expressions associated with a program
16650 unit, assign types to all intermediate expressions, make sure that all
16651 assignments are to compatible types and figure out which names refer to
16652 which functions or subroutines. */
16655 gfc_resolve (gfc_namespace
*ns
)
16657 gfc_namespace
*old_ns
;
16658 code_stack
*old_cs_base
;
16659 struct gfc_omp_saved_state old_omp_state
;
16665 old_ns
= gfc_current_ns
;
16666 old_cs_base
= cs_base
;
16668 /* As gfc_resolve can be called during resolution of an OpenMP construct
16669 body, we should clear any state associated to it, so that say NS's
16670 DO loops are not interpreted as OpenMP loops. */
16671 if (!ns
->construct_entities
)
16672 gfc_omp_save_and_clear_state (&old_omp_state
);
16674 resolve_types (ns
);
16675 component_assignment_level
= 0;
16676 resolve_codes (ns
);
16678 gfc_current_ns
= old_ns
;
16679 cs_base
= old_cs_base
;
16682 gfc_run_passes (ns
);
16684 if (!ns
->construct_entities
)
16685 gfc_omp_restore_state (&old_omp_state
);