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 gfc_error ("%qs at %L should be a SUBROUTINE",
6270 c
->expr1
->value
.compcall
.name
, &c
->loc
);
6274 if (!check_typebound_baseobject (c
->expr1
))
6277 /* Pass along the name for CLASS methods, where the vtab
6278 procedure pointer component has to be referenced. */
6280 *name
= c
->expr1
->value
.compcall
.name
;
6282 if (!resolve_typebound_generic_call (c
->expr1
, name
))
6285 /* Pass along the NON_OVERRIDABLE attribute of the specific TBP. */
6287 *overridable
= !c
->expr1
->value
.compcall
.tbp
->non_overridable
;
6289 /* Transform into an ordinary EXEC_CALL for now. */
6291 if (!resolve_typebound_static (c
->expr1
, &target
, &newactual
))
6294 c
->ext
.actual
= newactual
;
6295 c
->symtree
= target
;
6296 c
->op
= (c
->expr1
->value
.compcall
.assign
? EXEC_ASSIGN_CALL
: EXEC_CALL
);
6298 gcc_assert (!c
->expr1
->ref
&& !c
->expr1
->value
.compcall
.actual
);
6300 gfc_free_expr (c
->expr1
);
6301 c
->expr1
= gfc_get_expr ();
6302 c
->expr1
->expr_type
= EXPR_FUNCTION
;
6303 c
->expr1
->symtree
= target
;
6304 c
->expr1
->where
= c
->loc
;
6306 return resolve_call (c
);
6310 /* Resolve a component-call expression. */
6312 resolve_compcall (gfc_expr
* e
, const char **name
)
6314 gfc_actual_arglist
* newactual
;
6315 gfc_symtree
* target
;
6317 /* Check that's really a FUNCTION. */
6318 if (!e
->value
.compcall
.tbp
->function
)
6320 gfc_error ("%qs at %L should be a FUNCTION",
6321 e
->value
.compcall
.name
, &e
->where
);
6325 /* These must not be assign-calls! */
6326 gcc_assert (!e
->value
.compcall
.assign
);
6328 if (!check_typebound_baseobject (e
))
6331 /* Pass along the name for CLASS methods, where the vtab
6332 procedure pointer component has to be referenced. */
6334 *name
= e
->value
.compcall
.name
;
6336 if (!resolve_typebound_generic_call (e
, name
))
6338 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6340 /* Take the rank from the function's symbol. */
6341 if (e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
)
6342 e
->rank
= e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
->rank
;
6344 /* For now, we simply transform it into an EXPR_FUNCTION call with the same
6345 arglist to the TBP's binding target. */
6347 if (!resolve_typebound_static (e
, &target
, &newactual
))
6350 e
->value
.function
.actual
= newactual
;
6351 e
->value
.function
.name
= NULL
;
6352 e
->value
.function
.esym
= target
->n
.sym
;
6353 e
->value
.function
.isym
= NULL
;
6354 e
->symtree
= target
;
6355 e
->ts
= target
->n
.sym
->ts
;
6356 e
->expr_type
= EXPR_FUNCTION
;
6358 /* Resolution is not necessary if this is a class subroutine; this
6359 function only has to identify the specific proc. Resolution of
6360 the call will be done next in resolve_typebound_call. */
6361 return gfc_resolve_expr (e
);
6365 static bool resolve_fl_derived (gfc_symbol
*sym
);
6368 /* Resolve a typebound function, or 'method'. First separate all
6369 the non-CLASS references by calling resolve_compcall directly. */
6372 resolve_typebound_function (gfc_expr
* e
)
6374 gfc_symbol
*declared
;
6386 /* Deal with typebound operators for CLASS objects. */
6387 expr
= e
->value
.compcall
.base_object
;
6388 overridable
= !e
->value
.compcall
.tbp
->non_overridable
;
6389 if (expr
&& expr
->ts
.type
== BT_CLASS
&& e
->value
.compcall
.name
)
6391 /* If the base_object is not a variable, the corresponding actual
6392 argument expression must be stored in e->base_expression so
6393 that the corresponding tree temporary can be used as the base
6394 object in gfc_conv_procedure_call. */
6395 if (expr
->expr_type
!= EXPR_VARIABLE
)
6397 gfc_actual_arglist
*args
;
6399 for (args
= e
->value
.function
.actual
; args
; args
= args
->next
)
6401 if (expr
== args
->expr
)
6406 /* Since the typebound operators are generic, we have to ensure
6407 that any delays in resolution are corrected and that the vtab
6410 declared
= ts
.u
.derived
;
6411 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6412 if (c
->ts
.u
.derived
== NULL
)
6413 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6415 if (!resolve_compcall (e
, &name
))
6418 /* Use the generic name if it is there. */
6419 name
= name
? name
: e
->value
.function
.esym
->name
;
6420 e
->symtree
= expr
->symtree
;
6421 e
->ref
= gfc_copy_ref (expr
->ref
);
6422 get_declared_from_expr (&class_ref
, NULL
, e
, false);
6424 /* Trim away the extraneous references that emerge from nested
6425 use of interface.c (extend_expr). */
6426 if (class_ref
&& class_ref
->next
)
6428 gfc_free_ref_list (class_ref
->next
);
6429 class_ref
->next
= NULL
;
6431 else if (e
->ref
&& !class_ref
&& expr
->ts
.type
!= BT_CLASS
)
6433 gfc_free_ref_list (e
->ref
);
6437 gfc_add_vptr_component (e
);
6438 gfc_add_component_ref (e
, name
);
6439 e
->value
.function
.esym
= NULL
;
6440 if (expr
->expr_type
!= EXPR_VARIABLE
)
6441 e
->base_expr
= expr
;
6446 return resolve_compcall (e
, NULL
);
6448 if (!resolve_ref (e
))
6451 /* Get the CLASS declared type. */
6452 declared
= get_declared_from_expr (&class_ref
, &new_ref
, e
, true);
6454 if (!resolve_fl_derived (declared
))
6457 /* Weed out cases of the ultimate component being a derived type. */
6458 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6459 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6461 gfc_free_ref_list (new_ref
);
6462 return resolve_compcall (e
, NULL
);
6465 c
= gfc_find_component (declared
, "_data", true, true, NULL
);
6466 declared
= c
->ts
.u
.derived
;
6468 /* Treat the call as if it is a typebound procedure, in order to roll
6469 out the correct name for the specific function. */
6470 if (!resolve_compcall (e
, &name
))
6472 gfc_free_ref_list (new_ref
);
6479 /* Convert the expression to a procedure pointer component call. */
6480 e
->value
.function
.esym
= NULL
;
6486 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6487 gfc_add_vptr_component (e
);
6488 gfc_add_component_ref (e
, name
);
6490 /* Recover the typespec for the expression. This is really only
6491 necessary for generic procedures, where the additional call
6492 to gfc_add_component_ref seems to throw the collection of the
6493 correct typespec. */
6497 gfc_free_ref_list (new_ref
);
6502 /* Resolve a typebound subroutine, or 'method'. First separate all
6503 the non-CLASS references by calling resolve_typebound_call
6507 resolve_typebound_subroutine (gfc_code
*code
)
6509 gfc_symbol
*declared
;
6519 st
= code
->expr1
->symtree
;
6521 /* Deal with typebound operators for CLASS objects. */
6522 expr
= code
->expr1
->value
.compcall
.base_object
;
6523 overridable
= !code
->expr1
->value
.compcall
.tbp
->non_overridable
;
6524 if (expr
&& expr
->ts
.type
== BT_CLASS
&& code
->expr1
->value
.compcall
.name
)
6526 /* If the base_object is not a variable, the corresponding actual
6527 argument expression must be stored in e->base_expression so
6528 that the corresponding tree temporary can be used as the base
6529 object in gfc_conv_procedure_call. */
6530 if (expr
->expr_type
!= EXPR_VARIABLE
)
6532 gfc_actual_arglist
*args
;
6534 args
= code
->expr1
->value
.function
.actual
;
6535 for (; args
; args
= args
->next
)
6536 if (expr
== args
->expr
)
6540 /* Since the typebound operators are generic, we have to ensure
6541 that any delays in resolution are corrected and that the vtab
6543 declared
= expr
->ts
.u
.derived
;
6544 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6545 if (c
->ts
.u
.derived
== NULL
)
6546 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6548 if (!resolve_typebound_call (code
, &name
, NULL
))
6551 /* Use the generic name if it is there. */
6552 name
= name
? name
: code
->expr1
->value
.function
.esym
->name
;
6553 code
->expr1
->symtree
= expr
->symtree
;
6554 code
->expr1
->ref
= gfc_copy_ref (expr
->ref
);
6556 /* Trim away the extraneous references that emerge from nested
6557 use of interface.c (extend_expr). */
6558 get_declared_from_expr (&class_ref
, NULL
, code
->expr1
, false);
6559 if (class_ref
&& class_ref
->next
)
6561 gfc_free_ref_list (class_ref
->next
);
6562 class_ref
->next
= NULL
;
6564 else if (code
->expr1
->ref
&& !class_ref
)
6566 gfc_free_ref_list (code
->expr1
->ref
);
6567 code
->expr1
->ref
= NULL
;
6570 /* Now use the procedure in the vtable. */
6571 gfc_add_vptr_component (code
->expr1
);
6572 gfc_add_component_ref (code
->expr1
, name
);
6573 code
->expr1
->value
.function
.esym
= NULL
;
6574 if (expr
->expr_type
!= EXPR_VARIABLE
)
6575 code
->expr1
->base_expr
= expr
;
6580 return resolve_typebound_call (code
, NULL
, NULL
);
6582 if (!resolve_ref (code
->expr1
))
6585 /* Get the CLASS declared type. */
6586 get_declared_from_expr (&class_ref
, &new_ref
, code
->expr1
, true);
6588 /* Weed out cases of the ultimate component being a derived type. */
6589 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6590 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6592 gfc_free_ref_list (new_ref
);
6593 return resolve_typebound_call (code
, NULL
, NULL
);
6596 if (!resolve_typebound_call (code
, &name
, &overridable
))
6598 gfc_free_ref_list (new_ref
);
6601 ts
= code
->expr1
->ts
;
6605 /* Convert the expression to a procedure pointer component call. */
6606 code
->expr1
->value
.function
.esym
= NULL
;
6607 code
->expr1
->symtree
= st
;
6610 code
->expr1
->ref
= new_ref
;
6612 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6613 gfc_add_vptr_component (code
->expr1
);
6614 gfc_add_component_ref (code
->expr1
, name
);
6616 /* Recover the typespec for the expression. This is really only
6617 necessary for generic procedures, where the additional call
6618 to gfc_add_component_ref seems to throw the collection of the
6619 correct typespec. */
6620 code
->expr1
->ts
= ts
;
6623 gfc_free_ref_list (new_ref
);
6629 /* Resolve a CALL to a Procedure Pointer Component (Subroutine). */
6632 resolve_ppc_call (gfc_code
* c
)
6634 gfc_component
*comp
;
6636 comp
= gfc_get_proc_ptr_comp (c
->expr1
);
6637 gcc_assert (comp
!= NULL
);
6639 c
->resolved_sym
= c
->expr1
->symtree
->n
.sym
;
6640 c
->expr1
->expr_type
= EXPR_VARIABLE
;
6642 if (!comp
->attr
.subroutine
)
6643 gfc_add_subroutine (&comp
->attr
, comp
->name
, &c
->expr1
->where
);
6645 if (!resolve_ref (c
->expr1
))
6648 if (!update_ppc_arglist (c
->expr1
))
6651 c
->ext
.actual
= c
->expr1
->value
.compcall
.actual
;
6653 if (!resolve_actual_arglist (c
->ext
.actual
, comp
->attr
.proc
,
6654 !(comp
->ts
.interface
6655 && comp
->ts
.interface
->formal
)))
6658 if (!pure_subroutine (comp
->ts
.interface
, comp
->name
, &c
->expr1
->where
))
6661 gfc_ppc_use (comp
, &c
->expr1
->value
.compcall
.actual
, &c
->expr1
->where
);
6667 /* Resolve a Function Call to a Procedure Pointer Component (Function). */
6670 resolve_expr_ppc (gfc_expr
* e
)
6672 gfc_component
*comp
;
6674 comp
= gfc_get_proc_ptr_comp (e
);
6675 gcc_assert (comp
!= NULL
);
6677 /* Convert to EXPR_FUNCTION. */
6678 e
->expr_type
= EXPR_FUNCTION
;
6679 e
->value
.function
.isym
= NULL
;
6680 e
->value
.function
.actual
= e
->value
.compcall
.actual
;
6682 if (comp
->as
!= NULL
)
6683 e
->rank
= comp
->as
->rank
;
6685 if (!comp
->attr
.function
)
6686 gfc_add_function (&comp
->attr
, comp
->name
, &e
->where
);
6688 if (!resolve_ref (e
))
6691 if (!resolve_actual_arglist (e
->value
.function
.actual
, comp
->attr
.proc
,
6692 !(comp
->ts
.interface
6693 && comp
->ts
.interface
->formal
)))
6696 if (!update_ppc_arglist (e
))
6699 if (!check_pure_function(e
))
6702 gfc_ppc_use (comp
, &e
->value
.compcall
.actual
, &e
->where
);
6709 gfc_is_expandable_expr (gfc_expr
*e
)
6711 gfc_constructor
*con
;
6713 if (e
->expr_type
== EXPR_ARRAY
)
6715 /* Traverse the constructor looking for variables that are flavor
6716 parameter. Parameters must be expanded since they are fully used at
6718 con
= gfc_constructor_first (e
->value
.constructor
);
6719 for (; con
; con
= gfc_constructor_next (con
))
6721 if (con
->expr
->expr_type
== EXPR_VARIABLE
6722 && con
->expr
->symtree
6723 && (con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
6724 || con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_VARIABLE
))
6726 if (con
->expr
->expr_type
== EXPR_ARRAY
6727 && gfc_is_expandable_expr (con
->expr
))
6736 /* Sometimes variables in specification expressions of the result
6737 of module procedures in submodules wind up not being the 'real'
6738 dummy. Find this, if possible, in the namespace of the first
6742 fixup_unique_dummy (gfc_expr
*e
)
6744 gfc_symtree
*st
= NULL
;
6745 gfc_symbol
*s
= NULL
;
6747 if (e
->symtree
->n
.sym
->ns
->proc_name
6748 && e
->symtree
->n
.sym
->ns
->proc_name
->formal
)
6749 s
= e
->symtree
->n
.sym
->ns
->proc_name
->formal
->sym
;
6752 st
= gfc_find_symtree (s
->ns
->sym_root
, e
->symtree
->n
.sym
->name
);
6755 && st
->n
.sym
!= NULL
6756 && st
->n
.sym
->attr
.dummy
)
6760 /* Resolve an expression. That is, make sure that types of operands agree
6761 with their operators, intrinsic operators are converted to function calls
6762 for overloaded types and unresolved function references are resolved. */
6765 gfc_resolve_expr (gfc_expr
*e
)
6768 bool inquiry_save
, actual_arg_save
, first_actual_arg_save
;
6773 /* inquiry_argument only applies to variables. */
6774 inquiry_save
= inquiry_argument
;
6775 actual_arg_save
= actual_arg
;
6776 first_actual_arg_save
= first_actual_arg
;
6778 if (e
->expr_type
!= EXPR_VARIABLE
)
6780 inquiry_argument
= false;
6782 first_actual_arg
= false;
6784 else if (e
->symtree
!= NULL
6785 && *e
->symtree
->name
== '@'
6786 && e
->symtree
->n
.sym
->attr
.dummy
)
6788 /* Deal with submodule specification expressions that are not
6789 found to be referenced in module.c(read_cleanup). */
6790 fixup_unique_dummy (e
);
6793 switch (e
->expr_type
)
6796 t
= resolve_operator (e
);
6802 if (check_host_association (e
))
6803 t
= resolve_function (e
);
6805 t
= resolve_variable (e
);
6807 if (e
->ts
.type
== BT_CHARACTER
&& e
->ts
.u
.cl
== NULL
&& e
->ref
6808 && e
->ref
->type
!= REF_SUBSTRING
)
6809 gfc_resolve_substring_charlen (e
);
6814 t
= resolve_typebound_function (e
);
6817 case EXPR_SUBSTRING
:
6818 t
= resolve_ref (e
);
6827 t
= resolve_expr_ppc (e
);
6832 if (!resolve_ref (e
))
6835 t
= gfc_resolve_array_constructor (e
);
6836 /* Also try to expand a constructor. */
6839 expression_rank (e
);
6840 if (gfc_is_constant_expr (e
) || gfc_is_expandable_expr (e
))
6841 gfc_expand_constructor (e
, false);
6844 /* This provides the opportunity for the length of constructors with
6845 character valued function elements to propagate the string length
6846 to the expression. */
6847 if (t
&& e
->ts
.type
== BT_CHARACTER
)
6849 /* For efficiency, we call gfc_expand_constructor for BT_CHARACTER
6850 here rather then add a duplicate test for it above. */
6851 gfc_expand_constructor (e
, false);
6852 t
= gfc_resolve_character_array_constructor (e
);
6857 case EXPR_STRUCTURE
:
6858 t
= resolve_ref (e
);
6862 t
= resolve_structure_cons (e
, 0);
6866 t
= gfc_simplify_expr (e
, 0);
6870 gfc_internal_error ("gfc_resolve_expr(): Bad expression type");
6873 if (e
->ts
.type
== BT_CHARACTER
&& t
&& !e
->ts
.u
.cl
)
6876 inquiry_argument
= inquiry_save
;
6877 actual_arg
= actual_arg_save
;
6878 first_actual_arg
= first_actual_arg_save
;
6884 /* Resolve an expression from an iterator. They must be scalar and have
6885 INTEGER or (optionally) REAL type. */
6888 gfc_resolve_iterator_expr (gfc_expr
*expr
, bool real_ok
,
6889 const char *name_msgid
)
6891 if (!gfc_resolve_expr (expr
))
6894 if (expr
->rank
!= 0)
6896 gfc_error ("%s at %L must be a scalar", _(name_msgid
), &expr
->where
);
6900 if (expr
->ts
.type
!= BT_INTEGER
)
6902 if (expr
->ts
.type
== BT_REAL
)
6905 return gfc_notify_std (GFC_STD_F95_DEL
,
6906 "%s at %L must be integer",
6907 _(name_msgid
), &expr
->where
);
6910 gfc_error ("%s at %L must be INTEGER", _(name_msgid
),
6917 gfc_error ("%s at %L must be INTEGER", _(name_msgid
), &expr
->where
);
6925 /* Resolve the expressions in an iterator structure. If REAL_OK is
6926 false allow only INTEGER type iterators, otherwise allow REAL types.
6927 Set own_scope to true for ac-implied-do and data-implied-do as those
6928 have a separate scope such that, e.g., a INTENT(IN) doesn't apply. */
6931 gfc_resolve_iterator (gfc_iterator
*iter
, bool real_ok
, bool own_scope
)
6933 if (!gfc_resolve_iterator_expr (iter
->var
, real_ok
, "Loop variable"))
6936 if (!gfc_check_vardef_context (iter
->var
, false, false, own_scope
,
6937 _("iterator variable")))
6940 if (!gfc_resolve_iterator_expr (iter
->start
, real_ok
,
6941 "Start expression in DO loop"))
6944 if (!gfc_resolve_iterator_expr (iter
->end
, real_ok
,
6945 "End expression in DO loop"))
6948 if (!gfc_resolve_iterator_expr (iter
->step
, real_ok
,
6949 "Step expression in DO loop"))
6952 if (iter
->step
->expr_type
== EXPR_CONSTANT
)
6954 if ((iter
->step
->ts
.type
== BT_INTEGER
6955 && mpz_cmp_ui (iter
->step
->value
.integer
, 0) == 0)
6956 || (iter
->step
->ts
.type
== BT_REAL
6957 && mpfr_sgn (iter
->step
->value
.real
) == 0))
6959 gfc_error ("Step expression in DO loop at %L cannot be zero",
6960 &iter
->step
->where
);
6965 /* Convert start, end, and step to the same type as var. */
6966 if (iter
->start
->ts
.kind
!= iter
->var
->ts
.kind
6967 || iter
->start
->ts
.type
!= iter
->var
->ts
.type
)
6968 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
6970 if (iter
->end
->ts
.kind
!= iter
->var
->ts
.kind
6971 || iter
->end
->ts
.type
!= iter
->var
->ts
.type
)
6972 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
6974 if (iter
->step
->ts
.kind
!= iter
->var
->ts
.kind
6975 || iter
->step
->ts
.type
!= iter
->var
->ts
.type
)
6976 gfc_convert_type (iter
->step
, &iter
->var
->ts
, 1);
6978 if (iter
->start
->expr_type
== EXPR_CONSTANT
6979 && iter
->end
->expr_type
== EXPR_CONSTANT
6980 && iter
->step
->expr_type
== EXPR_CONSTANT
)
6983 if (iter
->start
->ts
.type
== BT_INTEGER
)
6985 sgn
= mpz_cmp_ui (iter
->step
->value
.integer
, 0);
6986 cmp
= mpz_cmp (iter
->end
->value
.integer
, iter
->start
->value
.integer
);
6990 sgn
= mpfr_sgn (iter
->step
->value
.real
);
6991 cmp
= mpfr_cmp (iter
->end
->value
.real
, iter
->start
->value
.real
);
6993 if (warn_zerotrip
&& ((sgn
> 0 && cmp
< 0) || (sgn
< 0 && cmp
> 0)))
6994 gfc_warning (OPT_Wzerotrip
,
6995 "DO loop at %L will be executed zero times",
6996 &iter
->step
->where
);
6999 if (iter
->end
->expr_type
== EXPR_CONSTANT
7000 && iter
->end
->ts
.type
== BT_INTEGER
7001 && iter
->step
->expr_type
== EXPR_CONSTANT
7002 && iter
->step
->ts
.type
== BT_INTEGER
7003 && (mpz_cmp_si (iter
->step
->value
.integer
, -1L) == 0
7004 || mpz_cmp_si (iter
->step
->value
.integer
, 1L) == 0))
7006 bool is_step_positive
= mpz_cmp_ui (iter
->step
->value
.integer
, 1) == 0;
7007 int k
= gfc_validate_kind (BT_INTEGER
, iter
->end
->ts
.kind
, false);
7009 if (is_step_positive
7010 && mpz_cmp (iter
->end
->value
.integer
, gfc_integer_kinds
[k
].huge
) == 0)
7011 gfc_warning (OPT_Wundefined_do_loop
,
7012 "DO loop at %L is undefined as it overflows",
7013 &iter
->step
->where
);
7014 else if (!is_step_positive
7015 && mpz_cmp (iter
->end
->value
.integer
,
7016 gfc_integer_kinds
[k
].min_int
) == 0)
7017 gfc_warning (OPT_Wundefined_do_loop
,
7018 "DO loop at %L is undefined as it underflows",
7019 &iter
->step
->where
);
7026 /* Traversal function for find_forall_index. f == 2 signals that
7027 that variable itself is not to be checked - only the references. */
7030 forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int *f
)
7032 if (expr
->expr_type
!= EXPR_VARIABLE
)
7035 /* A scalar assignment */
7036 if (!expr
->ref
|| *f
== 1)
7038 if (expr
->symtree
->n
.sym
== sym
)
7050 /* Check whether the FORALL index appears in the expression or not.
7051 Returns true if SYM is found in EXPR. */
7054 find_forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int f
)
7056 if (gfc_traverse_expr (expr
, sym
, forall_index
, f
))
7063 /* Resolve a list of FORALL iterators. The FORALL index-name is constrained
7064 to be a scalar INTEGER variable. The subscripts and stride are scalar
7065 INTEGERs, and if stride is a constant it must be nonzero.
7066 Furthermore "A subscript or stride in a forall-triplet-spec shall
7067 not contain a reference to any index-name in the
7068 forall-triplet-spec-list in which it appears." (7.5.4.1) */
7071 resolve_forall_iterators (gfc_forall_iterator
*it
)
7073 gfc_forall_iterator
*iter
, *iter2
;
7075 for (iter
= it
; iter
; iter
= iter
->next
)
7077 if (gfc_resolve_expr (iter
->var
)
7078 && (iter
->var
->ts
.type
!= BT_INTEGER
|| iter
->var
->rank
!= 0))
7079 gfc_error ("FORALL index-name at %L must be a scalar INTEGER",
7082 if (gfc_resolve_expr (iter
->start
)
7083 && (iter
->start
->ts
.type
!= BT_INTEGER
|| iter
->start
->rank
!= 0))
7084 gfc_error ("FORALL start expression at %L must be a scalar INTEGER",
7085 &iter
->start
->where
);
7086 if (iter
->var
->ts
.kind
!= iter
->start
->ts
.kind
)
7087 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7089 if (gfc_resolve_expr (iter
->end
)
7090 && (iter
->end
->ts
.type
!= BT_INTEGER
|| iter
->end
->rank
!= 0))
7091 gfc_error ("FORALL end expression at %L must be a scalar INTEGER",
7093 if (iter
->var
->ts
.kind
!= iter
->end
->ts
.kind
)
7094 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7096 if (gfc_resolve_expr (iter
->stride
))
7098 if (iter
->stride
->ts
.type
!= BT_INTEGER
|| iter
->stride
->rank
!= 0)
7099 gfc_error ("FORALL stride expression at %L must be a scalar %s",
7100 &iter
->stride
->where
, "INTEGER");
7102 if (iter
->stride
->expr_type
== EXPR_CONSTANT
7103 && mpz_cmp_ui (iter
->stride
->value
.integer
, 0) == 0)
7104 gfc_error ("FORALL stride expression at %L cannot be zero",
7105 &iter
->stride
->where
);
7107 if (iter
->var
->ts
.kind
!= iter
->stride
->ts
.kind
)
7108 gfc_convert_type (iter
->stride
, &iter
->var
->ts
, 1);
7111 for (iter
= it
; iter
; iter
= iter
->next
)
7112 for (iter2
= iter
; iter2
; iter2
= iter2
->next
)
7114 if (find_forall_index (iter2
->start
, iter
->var
->symtree
->n
.sym
, 0)
7115 || find_forall_index (iter2
->end
, iter
->var
->symtree
->n
.sym
, 0)
7116 || find_forall_index (iter2
->stride
, iter
->var
->symtree
->n
.sym
, 0))
7117 gfc_error ("FORALL index %qs may not appear in triplet "
7118 "specification at %L", iter
->var
->symtree
->name
,
7119 &iter2
->start
->where
);
7124 /* Given a pointer to a symbol that is a derived type, see if it's
7125 inaccessible, i.e. if it's defined in another module and the components are
7126 PRIVATE. The search is recursive if necessary. Returns zero if no
7127 inaccessible components are found, nonzero otherwise. */
7130 derived_inaccessible (gfc_symbol
*sym
)
7134 if (sym
->attr
.use_assoc
&& sym
->attr
.private_comp
)
7137 for (c
= sym
->components
; c
; c
= c
->next
)
7139 /* Prevent an infinite loop through this function. */
7140 if (c
->ts
.type
== BT_DERIVED
&& c
->attr
.pointer
7141 && sym
== c
->ts
.u
.derived
)
7144 if (c
->ts
.type
== BT_DERIVED
&& derived_inaccessible (c
->ts
.u
.derived
))
7152 /* Resolve the argument of a deallocate expression. The expression must be
7153 a pointer or a full array. */
7156 resolve_deallocate_expr (gfc_expr
*e
)
7158 symbol_attribute attr
;
7159 int allocatable
, pointer
;
7165 if (!gfc_resolve_expr (e
))
7168 if (e
->expr_type
!= EXPR_VARIABLE
)
7171 sym
= e
->symtree
->n
.sym
;
7172 unlimited
= UNLIMITED_POLY(sym
);
7174 if (sym
->ts
.type
== BT_CLASS
)
7176 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7177 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7181 allocatable
= sym
->attr
.allocatable
;
7182 pointer
= sym
->attr
.pointer
;
7184 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7189 if (ref
->u
.ar
.type
!= AR_FULL
7190 && !(ref
->u
.ar
.type
== AR_ELEMENT
&& ref
->u
.ar
.as
->rank
== 0
7191 && ref
->u
.ar
.codimen
&& gfc_ref_this_image (ref
)))
7196 c
= ref
->u
.c
.component
;
7197 if (c
->ts
.type
== BT_CLASS
)
7199 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7200 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7204 allocatable
= c
->attr
.allocatable
;
7205 pointer
= c
->attr
.pointer
;
7215 attr
= gfc_expr_attr (e
);
7217 if (allocatable
== 0 && attr
.pointer
== 0 && !unlimited
)
7220 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7226 if (gfc_is_coindexed (e
))
7228 gfc_error ("Coindexed allocatable object at %L", &e
->where
);
7233 && !gfc_check_vardef_context (e
, true, true, false,
7234 _("DEALLOCATE object")))
7236 if (!gfc_check_vardef_context (e
, false, true, false,
7237 _("DEALLOCATE object")))
7244 /* Returns true if the expression e contains a reference to the symbol sym. */
7246 sym_in_expr (gfc_expr
*e
, gfc_symbol
*sym
, int *f ATTRIBUTE_UNUSED
)
7248 if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
== sym
)
7255 gfc_find_sym_in_expr (gfc_symbol
*sym
, gfc_expr
*e
)
7257 return gfc_traverse_expr (e
, sym
, sym_in_expr
, 0);
7261 /* Given the expression node e for an allocatable/pointer of derived type to be
7262 allocated, get the expression node to be initialized afterwards (needed for
7263 derived types with default initializers, and derived types with allocatable
7264 components that need nullification.) */
7267 gfc_expr_to_initialize (gfc_expr
*e
)
7273 result
= gfc_copy_expr (e
);
7275 /* Change the last array reference from AR_ELEMENT to AR_FULL. */
7276 for (ref
= result
->ref
; ref
; ref
= ref
->next
)
7277 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
7279 ref
->u
.ar
.type
= AR_FULL
;
7281 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
7282 ref
->u
.ar
.start
[i
] = ref
->u
.ar
.end
[i
] = ref
->u
.ar
.stride
[i
] = NULL
;
7287 gfc_free_shape (&result
->shape
, result
->rank
);
7289 /* Recalculate rank, shape, etc. */
7290 gfc_resolve_expr (result
);
7295 /* If the last ref of an expression is an array ref, return a copy of the
7296 expression with that one removed. Otherwise, a copy of the original
7297 expression. This is used for allocate-expressions and pointer assignment
7298 LHS, where there may be an array specification that needs to be stripped
7299 off when using gfc_check_vardef_context. */
7302 remove_last_array_ref (gfc_expr
* e
)
7307 e2
= gfc_copy_expr (e
);
7308 for (r
= &e2
->ref
; *r
; r
= &(*r
)->next
)
7309 if ((*r
)->type
== REF_ARRAY
&& !(*r
)->next
)
7311 gfc_free_ref_list (*r
);
7320 /* Used in resolve_allocate_expr to check that a allocation-object and
7321 a source-expr are conformable. This does not catch all possible
7322 cases; in particular a runtime checking is needed. */
7325 conformable_arrays (gfc_expr
*e1
, gfc_expr
*e2
)
7328 for (tail
= e2
->ref
; tail
&& tail
->next
; tail
= tail
->next
);
7330 /* First compare rank. */
7331 if ((tail
&& e1
->rank
!= tail
->u
.ar
.as
->rank
)
7332 || (!tail
&& e1
->rank
!= e2
->rank
))
7334 gfc_error ("Source-expr at %L must be scalar or have the "
7335 "same rank as the allocate-object at %L",
7336 &e1
->where
, &e2
->where
);
7347 for (i
= 0; i
< e1
->rank
; i
++)
7349 if (tail
->u
.ar
.start
[i
] == NULL
)
7352 if (tail
->u
.ar
.end
[i
])
7354 mpz_set (s
, tail
->u
.ar
.end
[i
]->value
.integer
);
7355 mpz_sub (s
, s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7356 mpz_add_ui (s
, s
, 1);
7360 mpz_set (s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7363 if (mpz_cmp (e1
->shape
[i
], s
) != 0)
7365 gfc_error ("Source-expr at %L and allocate-object at %L must "
7366 "have the same shape", &e1
->where
, &e2
->where
);
7379 /* Resolve the expression in an ALLOCATE statement, doing the additional
7380 checks to see whether the expression is OK or not. The expression must
7381 have a trailing array reference that gives the size of the array. */
7384 resolve_allocate_expr (gfc_expr
*e
, gfc_code
*code
, bool *array_alloc_wo_spec
)
7386 int i
, pointer
, allocatable
, dimension
, is_abstract
;
7390 symbol_attribute attr
;
7391 gfc_ref
*ref
, *ref2
;
7394 gfc_symbol
*sym
= NULL
;
7399 /* Mark the utmost array component as being in allocate to allow DIMEN_STAR
7400 checking of coarrays. */
7401 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7402 if (ref
->next
== NULL
)
7405 if (ref
&& ref
->type
== REF_ARRAY
)
7406 ref
->u
.ar
.in_allocate
= true;
7408 if (!gfc_resolve_expr (e
))
7411 /* Make sure the expression is allocatable or a pointer. If it is
7412 pointer, the next-to-last reference must be a pointer. */
7416 sym
= e
->symtree
->n
.sym
;
7418 /* Check whether ultimate component is abstract and CLASS. */
7421 /* Is the allocate-object unlimited polymorphic? */
7422 unlimited
= UNLIMITED_POLY(e
);
7424 if (e
->expr_type
!= EXPR_VARIABLE
)
7427 attr
= gfc_expr_attr (e
);
7428 pointer
= attr
.pointer
;
7429 dimension
= attr
.dimension
;
7430 codimension
= attr
.codimension
;
7434 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
))
7436 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7437 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7438 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
7439 codimension
= CLASS_DATA (sym
)->attr
.codimension
;
7440 is_abstract
= CLASS_DATA (sym
)->attr
.abstract
;
7444 allocatable
= sym
->attr
.allocatable
;
7445 pointer
= sym
->attr
.pointer
;
7446 dimension
= sym
->attr
.dimension
;
7447 codimension
= sym
->attr
.codimension
;
7452 for (ref
= e
->ref
; ref
; ref2
= ref
, ref
= ref
->next
)
7457 if (ref
->u
.ar
.codimen
> 0)
7460 for (n
= ref
->u
.ar
.dimen
;
7461 n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
7462 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_THIS_IMAGE
)
7469 if (ref
->next
!= NULL
)
7477 gfc_error ("Coindexed allocatable object at %L",
7482 c
= ref
->u
.c
.component
;
7483 if (c
->ts
.type
== BT_CLASS
)
7485 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7486 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7487 dimension
= CLASS_DATA (c
)->attr
.dimension
;
7488 codimension
= CLASS_DATA (c
)->attr
.codimension
;
7489 is_abstract
= CLASS_DATA (c
)->attr
.abstract
;
7493 allocatable
= c
->attr
.allocatable
;
7494 pointer
= c
->attr
.pointer
;
7495 dimension
= c
->attr
.dimension
;
7496 codimension
= c
->attr
.codimension
;
7497 is_abstract
= c
->attr
.abstract
;
7509 /* Check for F08:C628. */
7510 if (allocatable
== 0 && pointer
== 0 && !unlimited
)
7512 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7517 /* Some checks for the SOURCE tag. */
7520 /* Check F03:C631. */
7521 if (!gfc_type_compatible (&e
->ts
, &code
->expr3
->ts
))
7523 gfc_error ("Type of entity at %L is type incompatible with "
7524 "source-expr at %L", &e
->where
, &code
->expr3
->where
);
7528 /* Check F03:C632 and restriction following Note 6.18. */
7529 if (code
->expr3
->rank
> 0 && !conformable_arrays (code
->expr3
, e
))
7532 /* Check F03:C633. */
7533 if (code
->expr3
->ts
.kind
!= e
->ts
.kind
&& !unlimited
)
7535 gfc_error ("The allocate-object at %L and the source-expr at %L "
7536 "shall have the same kind type parameter",
7537 &e
->where
, &code
->expr3
->where
);
7541 /* Check F2008, C642. */
7542 if (code
->expr3
->ts
.type
== BT_DERIVED
7543 && ((codimension
&& gfc_expr_attr (code
->expr3
).lock_comp
)
7544 || (code
->expr3
->ts
.u
.derived
->from_intmod
7545 == INTMOD_ISO_FORTRAN_ENV
7546 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7547 == ISOFORTRAN_LOCK_TYPE
)))
7549 gfc_error ("The source-expr at %L shall neither be of type "
7550 "LOCK_TYPE nor have a LOCK_TYPE component if "
7551 "allocate-object at %L is a coarray",
7552 &code
->expr3
->where
, &e
->where
);
7556 /* Check TS18508, C702/C703. */
7557 if (code
->expr3
->ts
.type
== BT_DERIVED
7558 && ((codimension
&& gfc_expr_attr (code
->expr3
).event_comp
)
7559 || (code
->expr3
->ts
.u
.derived
->from_intmod
7560 == INTMOD_ISO_FORTRAN_ENV
7561 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7562 == ISOFORTRAN_EVENT_TYPE
)))
7564 gfc_error ("The source-expr at %L shall neither be of type "
7565 "EVENT_TYPE nor have a EVENT_TYPE component if "
7566 "allocate-object at %L is a coarray",
7567 &code
->expr3
->where
, &e
->where
);
7572 /* Check F08:C629. */
7573 if (is_abstract
&& code
->ext
.alloc
.ts
.type
== BT_UNKNOWN
7576 gcc_assert (e
->ts
.type
== BT_CLASS
);
7577 gfc_error ("Allocating %s of ABSTRACT base type at %L requires a "
7578 "type-spec or source-expr", sym
->name
, &e
->where
);
7582 /* Check F08:C632. */
7583 if (code
->ext
.alloc
.ts
.type
== BT_CHARACTER
&& !e
->ts
.deferred
7584 && !UNLIMITED_POLY (e
))
7588 if (!e
->ts
.u
.cl
->length
)
7591 cmp
= gfc_dep_compare_expr (e
->ts
.u
.cl
->length
,
7592 code
->ext
.alloc
.ts
.u
.cl
->length
);
7593 if (cmp
== 1 || cmp
== -1 || cmp
== -3)
7595 gfc_error ("Allocating %s at %L with type-spec requires the same "
7596 "character-length parameter as in the declaration",
7597 sym
->name
, &e
->where
);
7602 /* In the variable definition context checks, gfc_expr_attr is used
7603 on the expression. This is fooled by the array specification
7604 present in e, thus we have to eliminate that one temporarily. */
7605 e2
= remove_last_array_ref (e
);
7608 t
= gfc_check_vardef_context (e2
, true, true, false,
7609 _("ALLOCATE object"));
7611 t
= gfc_check_vardef_context (e2
, false, true, false,
7612 _("ALLOCATE object"));
7617 if (e
->ts
.type
== BT_CLASS
&& CLASS_DATA (e
)->attr
.dimension
7618 && !code
->expr3
&& code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7620 /* For class arrays, the initialization with SOURCE is done
7621 using _copy and trans_call. It is convenient to exploit that
7622 when the allocated type is different from the declared type but
7623 no SOURCE exists by setting expr3. */
7624 code
->expr3
= gfc_default_initializer (&code
->ext
.alloc
.ts
);
7626 else if (flag_coarray
!= GFC_FCOARRAY_LIB
&& e
->ts
.type
== BT_DERIVED
7627 && e
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
7628 && e
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
7630 /* We have to zero initialize the integer variable. */
7631 code
->expr3
= gfc_get_int_expr (gfc_default_integer_kind
, &e
->where
, 0);
7634 if (e
->ts
.type
== BT_CLASS
&& !unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7636 /* Make sure the vtab symbol is present when
7637 the module variables are generated. */
7638 gfc_typespec ts
= e
->ts
;
7640 ts
= code
->expr3
->ts
;
7641 else if (code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7642 ts
= code
->ext
.alloc
.ts
;
7644 /* Finding the vtab also publishes the type's symbol. Therefore this
7645 statement is necessary. */
7646 gfc_find_derived_vtab (ts
.u
.derived
);
7648 else if (unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7650 /* Again, make sure the vtab symbol is present when
7651 the module variables are generated. */
7652 gfc_typespec
*ts
= NULL
;
7654 ts
= &code
->expr3
->ts
;
7656 ts
= &code
->ext
.alloc
.ts
;
7660 /* Finding the vtab also publishes the type's symbol. Therefore this
7661 statement is necessary. */
7665 if (dimension
== 0 && codimension
== 0)
7668 /* Make sure the last reference node is an array specification. */
7670 if (!ref2
|| ref2
->type
!= REF_ARRAY
|| ref2
->u
.ar
.type
== AR_FULL
7671 || (dimension
&& ref2
->u
.ar
.dimen
== 0))
7676 if (!gfc_notify_std (GFC_STD_F2008
, "Array specification required "
7677 "in ALLOCATE statement at %L", &e
->where
))
7679 if (code
->expr3
->rank
!= 0)
7680 *array_alloc_wo_spec
= true;
7683 gfc_error ("Array specification or array-valued SOURCE= "
7684 "expression required in ALLOCATE statement at %L",
7691 gfc_error ("Array specification required in ALLOCATE statement "
7692 "at %L", &e
->where
);
7697 /* Make sure that the array section reference makes sense in the
7698 context of an ALLOCATE specification. */
7703 for (i
= ar
->dimen
; i
< ar
->dimen
+ ar
->codimen
; i
++)
7704 if (ar
->dimen_type
[i
] == DIMEN_THIS_IMAGE
)
7706 gfc_error ("Coarray specification required in ALLOCATE statement "
7707 "at %L", &e
->where
);
7711 for (i
= 0; i
< ar
->dimen
; i
++)
7713 if (ar
->type
== AR_ELEMENT
|| ar
->type
== AR_FULL
)
7716 switch (ar
->dimen_type
[i
])
7722 if (ar
->start
[i
] != NULL
7723 && ar
->end
[i
] != NULL
7724 && ar
->stride
[i
] == NULL
)
7732 case DIMEN_THIS_IMAGE
:
7733 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7739 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7741 sym
= a
->expr
->symtree
->n
.sym
;
7743 /* TODO - check derived type components. */
7744 if (gfc_bt_struct (sym
->ts
.type
) || sym
->ts
.type
== BT_CLASS
)
7747 if ((ar
->start
[i
] != NULL
7748 && gfc_find_sym_in_expr (sym
, ar
->start
[i
]))
7749 || (ar
->end
[i
] != NULL
7750 && gfc_find_sym_in_expr (sym
, ar
->end
[i
])))
7752 gfc_error ("%qs must not appear in the array specification at "
7753 "%L in the same ALLOCATE statement where it is "
7754 "itself allocated", sym
->name
, &ar
->where
);
7760 for (i
= ar
->dimen
; i
< ar
->codimen
+ ar
->dimen
; i
++)
7762 if (ar
->dimen_type
[i
] == DIMEN_ELEMENT
7763 || ar
->dimen_type
[i
] == DIMEN_RANGE
)
7765 if (i
== (ar
->dimen
+ ar
->codimen
- 1))
7767 gfc_error ("Expected '*' in coindex specification in ALLOCATE "
7768 "statement at %L", &e
->where
);
7774 if (ar
->dimen_type
[i
] == DIMEN_STAR
&& i
== (ar
->dimen
+ ar
->codimen
- 1)
7775 && ar
->stride
[i
] == NULL
)
7778 gfc_error ("Bad coarray specification in ALLOCATE statement at %L",
7792 resolve_allocate_deallocate (gfc_code
*code
, const char *fcn
)
7794 gfc_expr
*stat
, *errmsg
, *pe
, *qe
;
7795 gfc_alloc
*a
, *p
, *q
;
7798 errmsg
= code
->expr2
;
7800 /* Check the stat variable. */
7803 gfc_check_vardef_context (stat
, false, false, false,
7804 _("STAT variable"));
7806 if ((stat
->ts
.type
!= BT_INTEGER
7807 && !(stat
->ref
&& (stat
->ref
->type
== REF_ARRAY
7808 || stat
->ref
->type
== REF_COMPONENT
)))
7810 gfc_error ("Stat-variable at %L must be a scalar INTEGER "
7811 "variable", &stat
->where
);
7813 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7814 if (p
->expr
->symtree
->n
.sym
->name
== stat
->symtree
->n
.sym
->name
)
7816 gfc_ref
*ref1
, *ref2
;
7819 for (ref1
= p
->expr
->ref
, ref2
= stat
->ref
; ref1
&& ref2
;
7820 ref1
= ref1
->next
, ref2
= ref2
->next
)
7822 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7824 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7833 gfc_error ("Stat-variable at %L shall not be %sd within "
7834 "the same %s statement", &stat
->where
, fcn
, fcn
);
7840 /* Check the errmsg variable. */
7844 gfc_warning (0, "ERRMSG at %L is useless without a STAT tag",
7847 gfc_check_vardef_context (errmsg
, false, false, false,
7848 _("ERRMSG variable"));
7850 /* F18:R928 alloc-opt is ERRMSG = errmsg-variable
7851 F18:R930 errmsg-variable is scalar-default-char-variable
7852 F18:R906 default-char-variable is variable
7853 F18:C906 default-char-variable shall be default character. */
7854 if ((errmsg
->ts
.type
!= BT_CHARACTER
7856 && (errmsg
->ref
->type
== REF_ARRAY
7857 || errmsg
->ref
->type
== REF_COMPONENT
)))
7859 || errmsg
->ts
.kind
!= gfc_default_character_kind
)
7860 gfc_error ("ERRMSG variable at %L shall be a scalar default CHARACTER "
7861 "variable", &errmsg
->where
);
7863 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7864 if (p
->expr
->symtree
->n
.sym
->name
== errmsg
->symtree
->n
.sym
->name
)
7866 gfc_ref
*ref1
, *ref2
;
7869 for (ref1
= p
->expr
->ref
, ref2
= errmsg
->ref
; ref1
&& ref2
;
7870 ref1
= ref1
->next
, ref2
= ref2
->next
)
7872 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7874 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7883 gfc_error ("Errmsg-variable at %L shall not be %sd within "
7884 "the same %s statement", &errmsg
->where
, fcn
, fcn
);
7890 /* Check that an allocate-object appears only once in the statement. */
7892 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7895 for (q
= p
->next
; q
; q
= q
->next
)
7898 if (pe
->symtree
->n
.sym
->name
== qe
->symtree
->n
.sym
->name
)
7900 /* This is a potential collision. */
7901 gfc_ref
*pr
= pe
->ref
;
7902 gfc_ref
*qr
= qe
->ref
;
7904 /* Follow the references until
7905 a) They start to differ, in which case there is no error;
7906 you can deallocate a%b and a%c in a single statement
7907 b) Both of them stop, which is an error
7908 c) One of them stops, which is also an error. */
7911 if (pr
== NULL
&& qr
== NULL
)
7913 gfc_error ("Allocate-object at %L also appears at %L",
7914 &pe
->where
, &qe
->where
);
7917 else if (pr
!= NULL
&& qr
== NULL
)
7919 gfc_error ("Allocate-object at %L is subobject of"
7920 " object at %L", &pe
->where
, &qe
->where
);
7923 else if (pr
== NULL
&& qr
!= NULL
)
7925 gfc_error ("Allocate-object at %L is subobject of"
7926 " object at %L", &qe
->where
, &pe
->where
);
7929 /* Here, pr != NULL && qr != NULL */
7930 gcc_assert(pr
->type
== qr
->type
);
7931 if (pr
->type
== REF_ARRAY
)
7933 /* Handle cases like allocate(v(3)%x(3), v(2)%x(3)),
7935 gcc_assert (qr
->type
== REF_ARRAY
);
7937 if (pr
->next
&& qr
->next
)
7940 gfc_array_ref
*par
= &(pr
->u
.ar
);
7941 gfc_array_ref
*qar
= &(qr
->u
.ar
);
7943 for (i
=0; i
<par
->dimen
; i
++)
7945 if ((par
->start
[i
] != NULL
7946 || qar
->start
[i
] != NULL
)
7947 && gfc_dep_compare_expr (par
->start
[i
],
7948 qar
->start
[i
]) != 0)
7955 if (pr
->u
.c
.component
->name
!= qr
->u
.c
.component
->name
)
7968 if (strcmp (fcn
, "ALLOCATE") == 0)
7970 bool arr_alloc_wo_spec
= false;
7972 /* Resolving the expr3 in the loop over all objects to allocate would
7973 execute loop invariant code for each loop item. Therefore do it just
7975 if (code
->expr3
&& code
->expr3
->mold
7976 && code
->expr3
->ts
.type
== BT_DERIVED
)
7978 /* Default initialization via MOLD (non-polymorphic). */
7979 gfc_expr
*rhs
= gfc_default_initializer (&code
->expr3
->ts
);
7982 gfc_resolve_expr (rhs
);
7983 gfc_free_expr (code
->expr3
);
7987 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7988 resolve_allocate_expr (a
->expr
, code
, &arr_alloc_wo_spec
);
7990 if (arr_alloc_wo_spec
&& code
->expr3
)
7992 /* Mark the allocate to have to take the array specification
7994 code
->ext
.alloc
.arr_spec_from_expr3
= 1;
7999 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8000 resolve_deallocate_expr (a
->expr
);
8005 /************ SELECT CASE resolution subroutines ************/
8007 /* Callback function for our mergesort variant. Determines interval
8008 overlaps for CASEs. Return <0 if op1 < op2, 0 for overlap, >0 for
8009 op1 > op2. Assumes we're not dealing with the default case.
8010 We have op1 = (:L), (K:L) or (K:) and op2 = (:N), (M:N) or (M:).
8011 There are nine situations to check. */
8014 compare_cases (const gfc_case
*op1
, const gfc_case
*op2
)
8018 if (op1
->low
== NULL
) /* op1 = (:L) */
8020 /* op2 = (:N), so overlap. */
8022 /* op2 = (M:) or (M:N), L < M */
8023 if (op2
->low
!= NULL
8024 && gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8027 else if (op1
->high
== NULL
) /* op1 = (K:) */
8029 /* op2 = (M:), so overlap. */
8031 /* op2 = (:N) or (M:N), K > N */
8032 if (op2
->high
!= NULL
8033 && gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8036 else /* op1 = (K:L) */
8038 if (op2
->low
== NULL
) /* op2 = (:N), K > N */
8039 retval
= (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8041 else if (op2
->high
== NULL
) /* op2 = (M:), L < M */
8042 retval
= (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8044 else /* op2 = (M:N) */
8048 if (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8051 else if (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8060 /* Merge-sort a double linked case list, detecting overlap in the
8061 process. LIST is the head of the double linked case list before it
8062 is sorted. Returns the head of the sorted list if we don't see any
8063 overlap, or NULL otherwise. */
8066 check_case_overlap (gfc_case
*list
)
8068 gfc_case
*p
, *q
, *e
, *tail
;
8069 int insize
, nmerges
, psize
, qsize
, cmp
, overlap_seen
;
8071 /* If the passed list was empty, return immediately. */
8078 /* Loop unconditionally. The only exit from this loop is a return
8079 statement, when we've finished sorting the case list. */
8086 /* Count the number of merges we do in this pass. */
8089 /* Loop while there exists a merge to be done. */
8094 /* Count this merge. */
8097 /* Cut the list in two pieces by stepping INSIZE places
8098 forward in the list, starting from P. */
8101 for (i
= 0; i
< insize
; i
++)
8110 /* Now we have two lists. Merge them! */
8111 while (psize
> 0 || (qsize
> 0 && q
!= NULL
))
8113 /* See from which the next case to merge comes from. */
8116 /* P is empty so the next case must come from Q. */
8121 else if (qsize
== 0 || q
== NULL
)
8130 cmp
= compare_cases (p
, q
);
8133 /* The whole case range for P is less than the
8141 /* The whole case range for Q is greater than
8142 the case range for P. */
8149 /* The cases overlap, or they are the same
8150 element in the list. Either way, we must
8151 issue an error and get the next case from P. */
8152 /* FIXME: Sort P and Q by line number. */
8153 gfc_error ("CASE label at %L overlaps with CASE "
8154 "label at %L", &p
->where
, &q
->where
);
8162 /* Add the next element to the merged list. */
8171 /* P has now stepped INSIZE places along, and so has Q. So
8172 they're the same. */
8177 /* If we have done only one merge or none at all, we've
8178 finished sorting the cases. */
8187 /* Otherwise repeat, merging lists twice the size. */
8193 /* Check to see if an expression is suitable for use in a CASE statement.
8194 Makes sure that all case expressions are scalar constants of the same
8195 type. Return false if anything is wrong. */
8198 validate_case_label_expr (gfc_expr
*e
, gfc_expr
*case_expr
)
8200 if (e
== NULL
) return true;
8202 if (e
->ts
.type
!= case_expr
->ts
.type
)
8204 gfc_error ("Expression in CASE statement at %L must be of type %s",
8205 &e
->where
, gfc_basic_typename (case_expr
->ts
.type
));
8209 /* C805 (R808) For a given case-construct, each case-value shall be of
8210 the same type as case-expr. For character type, length differences
8211 are allowed, but the kind type parameters shall be the same. */
8213 if (case_expr
->ts
.type
== BT_CHARACTER
&& e
->ts
.kind
!= case_expr
->ts
.kind
)
8215 gfc_error ("Expression in CASE statement at %L must be of kind %d",
8216 &e
->where
, case_expr
->ts
.kind
);
8220 /* Convert the case value kind to that of case expression kind,
8223 if (e
->ts
.kind
!= case_expr
->ts
.kind
)
8224 gfc_convert_type_warn (e
, &case_expr
->ts
, 2, 0);
8228 gfc_error ("Expression in CASE statement at %L must be scalar",
8237 /* Given a completely parsed select statement, we:
8239 - Validate all expressions and code within the SELECT.
8240 - Make sure that the selection expression is not of the wrong type.
8241 - Make sure that no case ranges overlap.
8242 - Eliminate unreachable cases and unreachable code resulting from
8243 removing case labels.
8245 The standard does allow unreachable cases, e.g. CASE (5:3). But
8246 they are a hassle for code generation, and to prevent that, we just
8247 cut them out here. This is not necessary for overlapping cases
8248 because they are illegal and we never even try to generate code.
8250 We have the additional caveat that a SELECT construct could have
8251 been a computed GOTO in the source code. Fortunately we can fairly
8252 easily work around that here: The case_expr for a "real" SELECT CASE
8253 is in code->expr1, but for a computed GOTO it is in code->expr2. All
8254 we have to do is make sure that the case_expr is a scalar integer
8258 resolve_select (gfc_code
*code
, bool select_type
)
8261 gfc_expr
*case_expr
;
8262 gfc_case
*cp
, *default_case
, *tail
, *head
;
8263 int seen_unreachable
;
8269 if (code
->expr1
== NULL
)
8271 /* This was actually a computed GOTO statement. */
8272 case_expr
= code
->expr2
;
8273 if (case_expr
->ts
.type
!= BT_INTEGER
|| case_expr
->rank
!= 0)
8274 gfc_error ("Selection expression in computed GOTO statement "
8275 "at %L must be a scalar integer expression",
8278 /* Further checking is not necessary because this SELECT was built
8279 by the compiler, so it should always be OK. Just move the
8280 case_expr from expr2 to expr so that we can handle computed
8281 GOTOs as normal SELECTs from here on. */
8282 code
->expr1
= code
->expr2
;
8287 case_expr
= code
->expr1
;
8288 type
= case_expr
->ts
.type
;
8291 if (type
!= BT_LOGICAL
&& type
!= BT_INTEGER
&& type
!= BT_CHARACTER
)
8293 gfc_error ("Argument of SELECT statement at %L cannot be %s",
8294 &case_expr
->where
, gfc_typename (&case_expr
->ts
));
8296 /* Punt. Going on here just produce more garbage error messages. */
8301 if (!select_type
&& case_expr
->rank
!= 0)
8303 gfc_error ("Argument of SELECT statement at %L must be a scalar "
8304 "expression", &case_expr
->where
);
8310 /* Raise a warning if an INTEGER case value exceeds the range of
8311 the case-expr. Later, all expressions will be promoted to the
8312 largest kind of all case-labels. */
8314 if (type
== BT_INTEGER
)
8315 for (body
= code
->block
; body
; body
= body
->block
)
8316 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8319 && gfc_check_integer_range (cp
->low
->value
.integer
,
8320 case_expr
->ts
.kind
) != ARITH_OK
)
8321 gfc_warning (0, "Expression in CASE statement at %L is "
8322 "not in the range of %s", &cp
->low
->where
,
8323 gfc_typename (&case_expr
->ts
));
8326 && cp
->low
!= cp
->high
8327 && gfc_check_integer_range (cp
->high
->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
->high
->where
,
8331 gfc_typename (&case_expr
->ts
));
8334 /* PR 19168 has a long discussion concerning a mismatch of the kinds
8335 of the SELECT CASE expression and its CASE values. Walk the lists
8336 of case values, and if we find a mismatch, promote case_expr to
8337 the appropriate kind. */
8339 if (type
== BT_LOGICAL
|| type
== BT_INTEGER
)
8341 for (body
= code
->block
; body
; body
= body
->block
)
8343 /* Walk the case label list. */
8344 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8346 /* Intercept the DEFAULT case. It does not have a kind. */
8347 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8350 /* Unreachable case ranges are discarded, so ignore. */
8351 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8352 && cp
->low
!= cp
->high
8353 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8357 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->low
))
8358 gfc_convert_type_warn (case_expr
, &cp
->low
->ts
, 2, 0);
8360 if (cp
->high
!= NULL
8361 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->high
))
8362 gfc_convert_type_warn (case_expr
, &cp
->high
->ts
, 2, 0);
8367 /* Assume there is no DEFAULT case. */
8368 default_case
= NULL
;
8373 for (body
= code
->block
; body
; body
= body
->block
)
8375 /* Assume the CASE list is OK, and all CASE labels can be matched. */
8377 seen_unreachable
= 0;
8379 /* Walk the case label list, making sure that all case labels
8381 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8383 /* Count the number of cases in the whole construct. */
8386 /* Intercept the DEFAULT case. */
8387 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8389 if (default_case
!= NULL
)
8391 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8392 "by a second DEFAULT CASE at %L",
8393 &default_case
->where
, &cp
->where
);
8404 /* Deal with single value cases and case ranges. Errors are
8405 issued from the validation function. */
8406 if (!validate_case_label_expr (cp
->low
, case_expr
)
8407 || !validate_case_label_expr (cp
->high
, case_expr
))
8413 if (type
== BT_LOGICAL
8414 && ((cp
->low
== NULL
|| cp
->high
== NULL
)
8415 || cp
->low
!= cp
->high
))
8417 gfc_error ("Logical range in CASE statement at %L is not "
8418 "allowed", &cp
->low
->where
);
8423 if (type
== BT_LOGICAL
&& cp
->low
->expr_type
== EXPR_CONSTANT
)
8426 value
= cp
->low
->value
.logical
== 0 ? 2 : 1;
8427 if (value
& seen_logical
)
8429 gfc_error ("Constant logical value in CASE statement "
8430 "is repeated at %L",
8435 seen_logical
|= value
;
8438 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8439 && cp
->low
!= cp
->high
8440 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8442 if (warn_surprising
)
8443 gfc_warning (OPT_Wsurprising
,
8444 "Range specification at %L can never be matched",
8447 cp
->unreachable
= 1;
8448 seen_unreachable
= 1;
8452 /* If the case range can be matched, it can also overlap with
8453 other cases. To make sure it does not, we put it in a
8454 double linked list here. We sort that with a merge sort
8455 later on to detect any overlapping cases. */
8459 head
->right
= head
->left
= NULL
;
8464 tail
->right
->left
= tail
;
8471 /* It there was a failure in the previous case label, give up
8472 for this case label list. Continue with the next block. */
8476 /* See if any case labels that are unreachable have been seen.
8477 If so, we eliminate them. This is a bit of a kludge because
8478 the case lists for a single case statement (label) is a
8479 single forward linked lists. */
8480 if (seen_unreachable
)
8482 /* Advance until the first case in the list is reachable. */
8483 while (body
->ext
.block
.case_list
!= NULL
8484 && body
->ext
.block
.case_list
->unreachable
)
8486 gfc_case
*n
= body
->ext
.block
.case_list
;
8487 body
->ext
.block
.case_list
= body
->ext
.block
.case_list
->next
;
8489 gfc_free_case_list (n
);
8492 /* Strip all other unreachable cases. */
8493 if (body
->ext
.block
.case_list
)
8495 for (cp
= body
->ext
.block
.case_list
; cp
&& cp
->next
; cp
= cp
->next
)
8497 if (cp
->next
->unreachable
)
8499 gfc_case
*n
= cp
->next
;
8500 cp
->next
= cp
->next
->next
;
8502 gfc_free_case_list (n
);
8509 /* See if there were overlapping cases. If the check returns NULL,
8510 there was overlap. In that case we don't do anything. If head
8511 is non-NULL, we prepend the DEFAULT case. The sorted list can
8512 then used during code generation for SELECT CASE constructs with
8513 a case expression of a CHARACTER type. */
8516 head
= check_case_overlap (head
);
8518 /* Prepend the default_case if it is there. */
8519 if (head
!= NULL
&& default_case
)
8521 default_case
->left
= NULL
;
8522 default_case
->right
= head
;
8523 head
->left
= default_case
;
8527 /* Eliminate dead blocks that may be the result if we've seen
8528 unreachable case labels for a block. */
8529 for (body
= code
; body
&& body
->block
; body
= body
->block
)
8531 if (body
->block
->ext
.block
.case_list
== NULL
)
8533 /* Cut the unreachable block from the code chain. */
8534 gfc_code
*c
= body
->block
;
8535 body
->block
= c
->block
;
8537 /* Kill the dead block, but not the blocks below it. */
8539 gfc_free_statements (c
);
8543 /* More than two cases is legal but insane for logical selects.
8544 Issue a warning for it. */
8545 if (warn_surprising
&& type
== BT_LOGICAL
&& ncases
> 2)
8546 gfc_warning (OPT_Wsurprising
,
8547 "Logical SELECT CASE block at %L has more that two cases",
8552 /* Check if a derived type is extensible. */
8555 gfc_type_is_extensible (gfc_symbol
*sym
)
8557 return !(sym
->attr
.is_bind_c
|| sym
->attr
.sequence
8558 || (sym
->attr
.is_class
8559 && sym
->components
->ts
.u
.derived
->attr
.unlimited_polymorphic
));
8564 resolve_types (gfc_namespace
*ns
);
8566 /* Resolve an associate-name: Resolve target and ensure the type-spec is
8567 correct as well as possibly the array-spec. */
8570 resolve_assoc_var (gfc_symbol
* sym
, bool resolve_target
)
8574 gcc_assert (sym
->assoc
);
8575 gcc_assert (sym
->attr
.flavor
== FL_VARIABLE
);
8577 /* If this is for SELECT TYPE, the target may not yet be set. In that
8578 case, return. Resolution will be called later manually again when
8580 target
= sym
->assoc
->target
;
8583 gcc_assert (!sym
->assoc
->dangling
);
8585 if (resolve_target
&& !gfc_resolve_expr (target
))
8588 /* For variable targets, we get some attributes from the target. */
8589 if (target
->expr_type
== EXPR_VARIABLE
)
8593 gcc_assert (target
->symtree
);
8594 tsym
= target
->symtree
->n
.sym
;
8596 sym
->attr
.asynchronous
= tsym
->attr
.asynchronous
;
8597 sym
->attr
.volatile_
= tsym
->attr
.volatile_
;
8599 sym
->attr
.target
= tsym
->attr
.target
8600 || gfc_expr_attr (target
).pointer
;
8601 if (is_subref_array (target
))
8602 sym
->attr
.subref_array_pointer
= 1;
8605 if (target
->expr_type
== EXPR_NULL
)
8607 gfc_error ("Selector at %L cannot be NULL()", &target
->where
);
8610 else if (target
->ts
.type
== BT_UNKNOWN
)
8612 gfc_error ("Selector at %L has no type", &target
->where
);
8616 /* Get type if this was not already set. Note that it can be
8617 some other type than the target in case this is a SELECT TYPE
8618 selector! So we must not update when the type is already there. */
8619 if (sym
->ts
.type
== BT_UNKNOWN
)
8620 sym
->ts
= target
->ts
;
8622 gcc_assert (sym
->ts
.type
!= BT_UNKNOWN
);
8624 /* See if this is a valid association-to-variable. */
8625 sym
->assoc
->variable
= (target
->expr_type
== EXPR_VARIABLE
8626 && !gfc_has_vector_subscript (target
));
8628 /* Finally resolve if this is an array or not. */
8629 if (sym
->attr
.dimension
&& target
->rank
== 0)
8631 /* primary.c makes the assumption that a reference to an associate
8632 name followed by a left parenthesis is an array reference. */
8633 if (sym
->ts
.type
!= BT_CHARACTER
)
8634 gfc_error ("Associate-name %qs at %L is used as array",
8635 sym
->name
, &sym
->declared_at
);
8636 sym
->attr
.dimension
= 0;
8641 /* We cannot deal with class selectors that need temporaries. */
8642 if (target
->ts
.type
== BT_CLASS
8643 && gfc_ref_needs_temporary_p (target
->ref
))
8645 gfc_error ("CLASS selector at %L needs a temporary which is not "
8646 "yet implemented", &target
->where
);
8650 if (target
->ts
.type
== BT_CLASS
)
8651 gfc_fix_class_refs (target
);
8653 if (target
->rank
!= 0)
8656 /* The rank may be incorrectly guessed at parsing, therefore make sure
8657 it is corrected now. */
8658 if (sym
->ts
.type
!= BT_CLASS
&& (!sym
->as
|| sym
->assoc
->rankguessed
))
8661 sym
->as
= gfc_get_array_spec ();
8663 as
->rank
= target
->rank
;
8664 as
->type
= AS_DEFERRED
;
8665 as
->corank
= gfc_get_corank (target
);
8666 sym
->attr
.dimension
= 1;
8667 if (as
->corank
!= 0)
8668 sym
->attr
.codimension
= 1;
8673 /* target's rank is 0, but the type of the sym is still array valued,
8674 which has to be corrected. */
8675 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)
8678 symbol_attribute attr
;
8679 /* The associated variable's type is still the array type
8680 correct this now. */
8681 gfc_typespec
*ts
= &target
->ts
;
8684 for (ref
= target
->ref
; ref
!= NULL
; ref
= ref
->next
)
8689 ts
= &ref
->u
.c
.component
->ts
;
8692 if (ts
->type
== BT_CLASS
)
8693 ts
= &ts
->u
.derived
->components
->ts
;
8699 /* Create a scalar instance of the current class type. Because the
8700 rank of a class array goes into its name, the type has to be
8701 rebuild. The alternative of (re-)setting just the attributes
8702 and as in the current type, destroys the type also in other
8706 sym
->ts
.type
= BT_CLASS
;
8707 attr
= CLASS_DATA (sym
)->attr
;
8709 attr
.associate_var
= 1;
8710 attr
.dimension
= attr
.codimension
= 0;
8711 attr
.class_pointer
= 1;
8712 if (!gfc_build_class_symbol (&sym
->ts
, &attr
, &as
))
8714 /* Make sure the _vptr is set. */
8715 c
= gfc_find_component (sym
->ts
.u
.derived
, "_vptr", true, true, NULL
);
8716 if (c
->ts
.u
.derived
== NULL
)
8717 c
->ts
.u
.derived
= gfc_find_derived_vtab (sym
->ts
.u
.derived
);
8718 CLASS_DATA (sym
)->attr
.pointer
= 1;
8719 CLASS_DATA (sym
)->attr
.class_pointer
= 1;
8720 gfc_set_sym_referenced (sym
->ts
.u
.derived
);
8721 gfc_commit_symbol (sym
->ts
.u
.derived
);
8722 /* _vptr now has the _vtab in it, change it to the _vtype. */
8723 if (c
->ts
.u
.derived
->attr
.vtab
)
8724 c
->ts
.u
.derived
= c
->ts
.u
.derived
->ts
.u
.derived
;
8725 c
->ts
.u
.derived
->ns
->types_resolved
= 0;
8726 resolve_types (c
->ts
.u
.derived
->ns
);
8730 /* Mark this as an associate variable. */
8731 sym
->attr
.associate_var
= 1;
8733 /* Fix up the type-spec for CHARACTER types. */
8734 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.select_type_temporary
)
8737 sym
->ts
.u
.cl
= target
->ts
.u
.cl
;
8739 if (!sym
->ts
.u
.cl
->length
8740 && !sym
->ts
.deferred
8741 && target
->expr_type
== EXPR_CONSTANT
)
8743 sym
->ts
.u
.cl
->length
=
8744 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
8745 target
->value
.character
.length
);
8747 else if ((!sym
->ts
.u
.cl
->length
8748 || sym
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
)
8749 && target
->expr_type
!= EXPR_VARIABLE
)
8751 sym
->ts
.u
.cl
= gfc_get_charlen();
8752 sym
->ts
.deferred
= 1;
8754 /* This is reset in trans-stmt.c after the assignment
8755 of the target expression to the associate name. */
8756 sym
->attr
.allocatable
= 1;
8760 /* If the target is a good class object, so is the associate variable. */
8761 if (sym
->ts
.type
== BT_CLASS
&& gfc_expr_attr (target
).class_ok
)
8762 sym
->attr
.class_ok
= 1;
8766 /* Ensure that SELECT TYPE expressions have the correct rank and a full
8767 array reference, where necessary. The symbols are artificial and so
8768 the dimension attribute and arrayspec can also be set. In addition,
8769 sometimes the expr1 arrives as BT_DERIVED, when the symbol is BT_CLASS.
8770 This is corrected here as well.*/
8773 fixup_array_ref (gfc_expr
**expr1
, gfc_expr
*expr2
,
8774 int rank
, gfc_ref
*ref
)
8776 gfc_ref
*nref
= (*expr1
)->ref
;
8777 gfc_symbol
*sym1
= (*expr1
)->symtree
->n
.sym
;
8778 gfc_symbol
*sym2
= expr2
? expr2
->symtree
->n
.sym
: NULL
;
8779 (*expr1
)->rank
= rank
;
8780 if (sym1
->ts
.type
== BT_CLASS
)
8782 if ((*expr1
)->ts
.type
!= BT_CLASS
)
8783 (*expr1
)->ts
= sym1
->ts
;
8785 CLASS_DATA (sym1
)->attr
.dimension
= 1;
8786 if (CLASS_DATA (sym1
)->as
== NULL
&& sym2
)
8787 CLASS_DATA (sym1
)->as
8788 = gfc_copy_array_spec (CLASS_DATA (sym2
)->as
);
8792 sym1
->attr
.dimension
= 1;
8793 if (sym1
->as
== NULL
&& sym2
)
8794 sym1
->as
= gfc_copy_array_spec (sym2
->as
);
8797 for (; nref
; nref
= nref
->next
)
8798 if (nref
->next
== NULL
)
8801 if (ref
&& nref
&& nref
->type
!= REF_ARRAY
)
8802 nref
->next
= gfc_copy_ref (ref
);
8803 else if (ref
&& !nref
)
8804 (*expr1
)->ref
= gfc_copy_ref (ref
);
8809 build_loc_call (gfc_expr
*sym_expr
)
8812 loc_call
= gfc_get_expr ();
8813 loc_call
->expr_type
= EXPR_FUNCTION
;
8814 gfc_get_sym_tree ("_loc", gfc_current_ns
, &loc_call
->symtree
, false);
8815 loc_call
->symtree
->n
.sym
->attr
.flavor
= FL_PROCEDURE
;
8816 loc_call
->symtree
->n
.sym
->attr
.intrinsic
= 1;
8817 loc_call
->symtree
->n
.sym
->result
= loc_call
->symtree
->n
.sym
;
8818 gfc_commit_symbol (loc_call
->symtree
->n
.sym
);
8819 loc_call
->ts
.type
= BT_INTEGER
;
8820 loc_call
->ts
.kind
= gfc_index_integer_kind
;
8821 loc_call
->value
.function
.isym
= gfc_intrinsic_function_by_id (GFC_ISYM_LOC
);
8822 loc_call
->value
.function
.actual
= gfc_get_actual_arglist ();
8823 loc_call
->value
.function
.actual
->expr
= sym_expr
;
8824 loc_call
->where
= sym_expr
->where
;
8828 /* Resolve a SELECT TYPE statement. */
8831 resolve_select_type (gfc_code
*code
, gfc_namespace
*old_ns
)
8833 gfc_symbol
*selector_type
;
8834 gfc_code
*body
, *new_st
, *if_st
, *tail
;
8835 gfc_code
*class_is
= NULL
, *default_case
= NULL
;
8838 char name
[GFC_MAX_SYMBOL_LEN
];
8842 gfc_ref
* ref
= NULL
;
8843 gfc_expr
*selector_expr
= NULL
;
8845 ns
= code
->ext
.block
.ns
;
8848 /* Check for F03:C813. */
8849 if (code
->expr1
->ts
.type
!= BT_CLASS
8850 && !(code
->expr2
&& code
->expr2
->ts
.type
== BT_CLASS
))
8852 gfc_error ("Selector shall be polymorphic in SELECT TYPE statement "
8853 "at %L", &code
->loc
);
8857 if (!code
->expr1
->symtree
->n
.sym
->attr
.class_ok
)
8862 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
8863 code
->expr1
->symtree
->n
.sym
->ts
= code
->expr2
->ts
;
8864 selector_type
= CLASS_DATA (code
->expr2
)->ts
.u
.derived
;
8866 if (code
->expr2
->rank
&& CLASS_DATA (code
->expr1
)->as
)
8867 CLASS_DATA (code
->expr1
)->as
->rank
= code
->expr2
->rank
;
8869 /* F2008: C803 The selector expression must not be coindexed. */
8870 if (gfc_is_coindexed (code
->expr2
))
8872 gfc_error ("Selector at %L must not be coindexed",
8873 &code
->expr2
->where
);
8880 selector_type
= CLASS_DATA (code
->expr1
)->ts
.u
.derived
;
8882 if (gfc_is_coindexed (code
->expr1
))
8884 gfc_error ("Selector at %L must not be coindexed",
8885 &code
->expr1
->where
);
8890 /* Loop over TYPE IS / CLASS IS cases. */
8891 for (body
= code
->block
; body
; body
= body
->block
)
8893 c
= body
->ext
.block
.case_list
;
8897 /* Check for repeated cases. */
8898 for (tail
= code
->block
; tail
; tail
= tail
->block
)
8900 gfc_case
*d
= tail
->ext
.block
.case_list
;
8904 if (c
->ts
.type
== d
->ts
.type
8905 && ((c
->ts
.type
== BT_DERIVED
8906 && c
->ts
.u
.derived
&& d
->ts
.u
.derived
8907 && !strcmp (c
->ts
.u
.derived
->name
,
8908 d
->ts
.u
.derived
->name
))
8909 || c
->ts
.type
== BT_UNKNOWN
8910 || (!(c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8911 && c
->ts
.kind
== d
->ts
.kind
)))
8913 gfc_error ("TYPE IS at %L overlaps with TYPE IS at %L",
8914 &c
->where
, &d
->where
);
8920 /* Check F03:C815. */
8921 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8922 && !selector_type
->attr
.unlimited_polymorphic
8923 && !gfc_type_is_extensible (c
->ts
.u
.derived
))
8925 gfc_error ("Derived type %qs at %L must be extensible",
8926 c
->ts
.u
.derived
->name
, &c
->where
);
8931 /* Check F03:C816. */
8932 if (c
->ts
.type
!= BT_UNKNOWN
&& !selector_type
->attr
.unlimited_polymorphic
8933 && ((c
->ts
.type
!= BT_DERIVED
&& c
->ts
.type
!= BT_CLASS
)
8934 || !gfc_type_is_extension_of (selector_type
, c
->ts
.u
.derived
)))
8936 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8937 gfc_error ("Derived type %qs at %L must be an extension of %qs",
8938 c
->ts
.u
.derived
->name
, &c
->where
, selector_type
->name
);
8940 gfc_error ("Unexpected intrinsic type %qs at %L",
8941 gfc_basic_typename (c
->ts
.type
), &c
->where
);
8946 /* Check F03:C814. */
8947 if (c
->ts
.type
== BT_CHARACTER
8948 && (c
->ts
.u
.cl
->length
!= NULL
|| c
->ts
.deferred
))
8950 gfc_error ("The type-spec at %L shall specify that each length "
8951 "type parameter is assumed", &c
->where
);
8956 /* Intercept the DEFAULT case. */
8957 if (c
->ts
.type
== BT_UNKNOWN
)
8959 /* Check F03:C818. */
8962 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8963 "by a second DEFAULT CASE at %L",
8964 &default_case
->ext
.block
.case_list
->where
, &c
->where
);
8969 default_case
= body
;
8976 /* Transform SELECT TYPE statement to BLOCK and associate selector to
8977 target if present. If there are any EXIT statements referring to the
8978 SELECT TYPE construct, this is no problem because the gfc_code
8979 reference stays the same and EXIT is equally possible from the BLOCK
8980 it is changed to. */
8981 code
->op
= EXEC_BLOCK
;
8984 gfc_association_list
* assoc
;
8986 assoc
= gfc_get_association_list ();
8987 assoc
->st
= code
->expr1
->symtree
;
8988 assoc
->target
= gfc_copy_expr (code
->expr2
);
8989 assoc
->target
->where
= code
->expr2
->where
;
8990 /* assoc->variable will be set by resolve_assoc_var. */
8992 code
->ext
.block
.assoc
= assoc
;
8993 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
8995 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
8998 code
->ext
.block
.assoc
= NULL
;
9000 /* Ensure that the selector rank and arrayspec are available to
9001 correct expressions in which they might be missing. */
9002 if (code
->expr2
&& code
->expr2
->rank
)
9004 rank
= code
->expr2
->rank
;
9005 for (ref
= code
->expr2
->ref
; ref
; ref
= ref
->next
)
9006 if (ref
->next
== NULL
)
9008 if (ref
&& ref
->type
== REF_ARRAY
)
9009 ref
= gfc_copy_ref (ref
);
9011 /* Fixup expr1 if necessary. */
9013 fixup_array_ref (&code
->expr1
, code
->expr2
, rank
, ref
);
9015 else if (code
->expr1
->rank
)
9017 rank
= code
->expr1
->rank
;
9018 for (ref
= code
->expr1
->ref
; ref
; ref
= ref
->next
)
9019 if (ref
->next
== NULL
)
9021 if (ref
&& ref
->type
== REF_ARRAY
)
9022 ref
= gfc_copy_ref (ref
);
9025 /* Add EXEC_SELECT to switch on type. */
9026 new_st
= gfc_get_code (code
->op
);
9027 new_st
->expr1
= code
->expr1
;
9028 new_st
->expr2
= code
->expr2
;
9029 new_st
->block
= code
->block
;
9030 code
->expr1
= code
->expr2
= NULL
;
9035 ns
->code
->next
= new_st
;
9037 code
->op
= EXEC_SELECT_TYPE
;
9039 /* Use the intrinsic LOC function to generate an integer expression
9040 for the vtable of the selector. Note that the rank of the selector
9041 expression has to be set to zero. */
9042 gfc_add_vptr_component (code
->expr1
);
9043 code
->expr1
->rank
= 0;
9044 code
->expr1
= build_loc_call (code
->expr1
);
9045 selector_expr
= code
->expr1
->value
.function
.actual
->expr
;
9047 /* Loop over TYPE IS / CLASS IS cases. */
9048 for (body
= code
->block
; body
; body
= body
->block
)
9052 c
= body
->ext
.block
.case_list
;
9054 /* Generate an index integer expression for address of the
9055 TYPE/CLASS vtable and store it in c->low. The hash expression
9056 is stored in c->high and is used to resolve intrinsic cases. */
9057 if (c
->ts
.type
!= BT_UNKNOWN
)
9059 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9061 vtab
= gfc_find_derived_vtab (c
->ts
.u
.derived
);
9063 c
->high
= gfc_get_int_expr (gfc_integer_4_kind
, NULL
,
9064 c
->ts
.u
.derived
->hash_value
);
9068 vtab
= gfc_find_vtab (&c
->ts
);
9069 gcc_assert (vtab
&& CLASS_DATA (vtab
)->initializer
);
9070 e
= CLASS_DATA (vtab
)->initializer
;
9071 c
->high
= gfc_copy_expr (e
);
9072 if (c
->high
->ts
.kind
!= gfc_integer_4_kind
)
9075 ts
.kind
= gfc_integer_4_kind
;
9076 ts
.type
= BT_INTEGER
;
9077 gfc_convert_type_warn (c
->high
, &ts
, 2, 0);
9081 e
= gfc_lval_expr_from_sym (vtab
);
9082 c
->low
= build_loc_call (e
);
9087 /* Associate temporary to selector. This should only be done
9088 when this case is actually true, so build a new ASSOCIATE
9089 that does precisely this here (instead of using the
9092 if (c
->ts
.type
== BT_CLASS
)
9093 sprintf (name
, "__tmp_class_%s", c
->ts
.u
.derived
->name
);
9094 else if (c
->ts
.type
== BT_DERIVED
)
9095 sprintf (name
, "__tmp_type_%s", c
->ts
.u
.derived
->name
);
9096 else if (c
->ts
.type
== BT_CHARACTER
)
9098 HOST_WIDE_INT charlen
= 0;
9099 if (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9100 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9101 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9102 snprintf (name
, sizeof (name
),
9103 "__tmp_%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9104 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9107 sprintf (name
, "__tmp_%s_%d", gfc_basic_typename (c
->ts
.type
),
9110 st
= gfc_find_symtree (ns
->sym_root
, name
);
9111 gcc_assert (st
->n
.sym
->assoc
);
9112 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9113 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9114 if (c
->ts
.type
!= BT_CLASS
&& c
->ts
.type
!= BT_UNKNOWN
)
9116 gfc_add_data_component (st
->n
.sym
->assoc
->target
);
9117 /* Fixup the target expression if necessary. */
9119 fixup_array_ref (&st
->n
.sym
->assoc
->target
, NULL
, rank
, ref
);
9122 new_st
= gfc_get_code (EXEC_BLOCK
);
9123 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9124 new_st
->ext
.block
.ns
->code
= body
->next
;
9125 body
->next
= new_st
;
9127 /* Chain in the new list only if it is marked as dangling. Otherwise
9128 there is a CASE label overlap and this is already used. Just ignore,
9129 the error is diagnosed elsewhere. */
9130 if (st
->n
.sym
->assoc
->dangling
)
9132 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9133 st
->n
.sym
->assoc
->dangling
= 0;
9136 resolve_assoc_var (st
->n
.sym
, false);
9139 /* Take out CLASS IS cases for separate treatment. */
9141 while (body
&& body
->block
)
9143 if (body
->block
->ext
.block
.case_list
->ts
.type
== BT_CLASS
)
9145 /* Add to class_is list. */
9146 if (class_is
== NULL
)
9148 class_is
= body
->block
;
9153 for (tail
= class_is
; tail
->block
; tail
= tail
->block
) ;
9154 tail
->block
= body
->block
;
9157 /* Remove from EXEC_SELECT list. */
9158 body
->block
= body
->block
->block
;
9171 /* Add a default case to hold the CLASS IS cases. */
9172 for (tail
= code
; tail
->block
; tail
= tail
->block
) ;
9173 tail
->block
= gfc_get_code (EXEC_SELECT_TYPE
);
9175 tail
->ext
.block
.case_list
= gfc_get_case ();
9176 tail
->ext
.block
.case_list
->ts
.type
= BT_UNKNOWN
;
9178 default_case
= tail
;
9181 /* More than one CLASS IS block? */
9182 if (class_is
->block
)
9186 /* Sort CLASS IS blocks by extension level. */
9190 for (c1
= &class_is
; (*c1
) && (*c1
)->block
; c1
= &((*c1
)->block
))
9193 /* F03:C817 (check for doubles). */
9194 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->hash_value
9195 == c2
->ext
.block
.case_list
->ts
.u
.derived
->hash_value
)
9197 gfc_error ("Double CLASS IS block in SELECT TYPE "
9199 &c2
->ext
.block
.case_list
->where
);
9202 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
9203 < c2
->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
)
9206 (*c1
)->block
= c2
->block
;
9216 /* Generate IF chain. */
9217 if_st
= gfc_get_code (EXEC_IF
);
9219 for (body
= class_is
; body
; body
= body
->block
)
9221 new_st
->block
= gfc_get_code (EXEC_IF
);
9222 new_st
= new_st
->block
;
9223 /* Set up IF condition: Call _gfortran_is_extension_of. */
9224 new_st
->expr1
= gfc_get_expr ();
9225 new_st
->expr1
->expr_type
= EXPR_FUNCTION
;
9226 new_st
->expr1
->ts
.type
= BT_LOGICAL
;
9227 new_st
->expr1
->ts
.kind
= 4;
9228 new_st
->expr1
->value
.function
.name
= gfc_get_string (PREFIX ("is_extension_of"));
9229 new_st
->expr1
->value
.function
.isym
= XCNEW (gfc_intrinsic_sym
);
9230 new_st
->expr1
->value
.function
.isym
->id
= GFC_ISYM_EXTENDS_TYPE_OF
;
9231 /* Set up arguments. */
9232 new_st
->expr1
->value
.function
.actual
= gfc_get_actual_arglist ();
9233 new_st
->expr1
->value
.function
.actual
->expr
= gfc_get_variable_expr (selector_expr
->symtree
);
9234 new_st
->expr1
->value
.function
.actual
->expr
->where
= code
->loc
;
9235 new_st
->expr1
->where
= code
->loc
;
9236 gfc_add_vptr_component (new_st
->expr1
->value
.function
.actual
->expr
);
9237 vtab
= gfc_find_derived_vtab (body
->ext
.block
.case_list
->ts
.u
.derived
);
9238 st
= gfc_find_symtree (vtab
->ns
->sym_root
, vtab
->name
);
9239 new_st
->expr1
->value
.function
.actual
->next
= gfc_get_actual_arglist ();
9240 new_st
->expr1
->value
.function
.actual
->next
->expr
= gfc_get_variable_expr (st
);
9241 new_st
->expr1
->value
.function
.actual
->next
->expr
->where
= code
->loc
;
9242 new_st
->next
= body
->next
;
9244 if (default_case
->next
)
9246 new_st
->block
= gfc_get_code (EXEC_IF
);
9247 new_st
= new_st
->block
;
9248 new_st
->next
= default_case
->next
;
9251 /* Replace CLASS DEFAULT code by the IF chain. */
9252 default_case
->next
= if_st
;
9255 /* Resolve the internal code. This can not be done earlier because
9256 it requires that the sym->assoc of selectors is set already. */
9257 gfc_current_ns
= ns
;
9258 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9259 gfc_current_ns
= old_ns
;
9266 /* Resolve a transfer statement. This is making sure that:
9267 -- a derived type being transferred has only non-pointer components
9268 -- a derived type being transferred doesn't have private components, unless
9269 it's being transferred from the module where the type was defined
9270 -- we're not trying to transfer a whole assumed size array. */
9273 resolve_transfer (gfc_code
*code
)
9276 gfc_symbol
*sym
, *derived
;
9280 bool formatted
= false;
9281 gfc_dt
*dt
= code
->ext
.dt
;
9282 gfc_symbol
*dtio_sub
= NULL
;
9286 while (exp
!= NULL
&& exp
->expr_type
== EXPR_OP
9287 && exp
->value
.op
.op
== INTRINSIC_PARENTHESES
)
9288 exp
= exp
->value
.op
.op1
;
9290 if (exp
&& exp
->expr_type
== EXPR_NULL
9293 gfc_error ("Invalid context for NULL () intrinsic at %L",
9298 if (exp
== NULL
|| (exp
->expr_type
!= EXPR_VARIABLE
9299 && exp
->expr_type
!= EXPR_FUNCTION
9300 && exp
->expr_type
!= EXPR_STRUCTURE
))
9303 /* If we are reading, the variable will be changed. Note that
9304 code->ext.dt may be NULL if the TRANSFER is related to
9305 an INQUIRE statement -- but in this case, we are not reading, either. */
9306 if (dt
&& dt
->dt_io_kind
->value
.iokind
== M_READ
9307 && !gfc_check_vardef_context (exp
, false, false, false,
9311 ts
= exp
->expr_type
== EXPR_STRUCTURE
? &exp
->ts
: &exp
->symtree
->n
.sym
->ts
;
9313 /* Go to actual component transferred. */
9314 for (ref
= exp
->ref
; ref
; ref
= ref
->next
)
9315 if (ref
->type
== REF_COMPONENT
)
9316 ts
= &ref
->u
.c
.component
->ts
;
9318 if (dt
&& dt
->dt_io_kind
->value
.iokind
!= M_INQUIRE
9319 && (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
))
9321 if (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
)
9322 derived
= ts
->u
.derived
;
9324 derived
= ts
->u
.derived
->components
->ts
.u
.derived
;
9326 /* Determine when to use the formatted DTIO procedure. */
9327 if (dt
&& (dt
->format_expr
|| dt
->format_label
))
9330 write
= dt
->dt_io_kind
->value
.iokind
== M_WRITE
9331 || dt
->dt_io_kind
->value
.iokind
== M_PRINT
;
9332 dtio_sub
= gfc_find_specific_dtio_proc (derived
, write
, formatted
);
9334 if (dtio_sub
!= NULL
&& exp
->expr_type
== EXPR_VARIABLE
)
9337 sym
= exp
->symtree
->n
.sym
->ns
->proc_name
;
9338 /* Check to see if this is a nested DTIO call, with the
9339 dummy as the io-list object. */
9340 if (sym
&& sym
== dtio_sub
&& sym
->formal
9341 && sym
->formal
->sym
== exp
->symtree
->n
.sym
9342 && exp
->ref
== NULL
)
9344 if (!sym
->attr
.recursive
)
9346 gfc_error ("DTIO %s procedure at %L must be recursive",
9347 sym
->name
, &sym
->declared_at
);
9354 if (ts
->type
== BT_CLASS
&& dtio_sub
== NULL
)
9356 gfc_error ("Data transfer element at %L cannot be polymorphic unless "
9357 "it is processed by a defined input/output procedure",
9362 if (ts
->type
== BT_DERIVED
)
9364 /* Check that transferred derived type doesn't contain POINTER
9365 components unless it is processed by a defined input/output
9367 if (ts
->u
.derived
->attr
.pointer_comp
&& dtio_sub
== NULL
)
9369 gfc_error ("Data transfer element at %L cannot have POINTER "
9370 "components unless it is processed by a defined "
9371 "input/output procedure", &code
->loc
);
9376 if (ts
->u
.derived
->attr
.proc_pointer_comp
)
9378 gfc_error ("Data transfer element at %L cannot have "
9379 "procedure pointer components", &code
->loc
);
9383 if (ts
->u
.derived
->attr
.alloc_comp
&& dtio_sub
== NULL
)
9385 gfc_error ("Data transfer element at %L cannot have ALLOCATABLE "
9386 "components unless it is processed by a defined "
9387 "input/output procedure", &code
->loc
);
9391 /* C_PTR and C_FUNPTR have private components which means they can not
9392 be printed. However, if -std=gnu and not -pedantic, allow
9393 the component to be printed to help debugging. */
9394 if (ts
->u
.derived
->ts
.f90_type
== BT_VOID
)
9396 if (!gfc_notify_std (GFC_STD_GNU
, "Data transfer element at %L "
9397 "cannot have PRIVATE components", &code
->loc
))
9400 else if (derived_inaccessible (ts
->u
.derived
) && dtio_sub
== NULL
)
9402 gfc_error ("Data transfer element at %L cannot have "
9403 "PRIVATE components unless it is processed by "
9404 "a defined input/output procedure", &code
->loc
);
9409 if (exp
->expr_type
== EXPR_STRUCTURE
)
9412 sym
= exp
->symtree
->n
.sym
;
9414 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SIZE
&& exp
->ref
9415 && exp
->ref
->type
== REF_ARRAY
&& exp
->ref
->u
.ar
.type
== AR_FULL
)
9417 gfc_error ("Data transfer element at %L cannot be a full reference to "
9418 "an assumed-size array", &code
->loc
);
9422 if (async_io_dt
&& exp
->expr_type
== EXPR_VARIABLE
)
9423 exp
->symtree
->n
.sym
->attr
.asynchronous
= 1;
9427 /*********** Toplevel code resolution subroutines ***********/
9429 /* Find the set of labels that are reachable from this block. We also
9430 record the last statement in each block. */
9433 find_reachable_labels (gfc_code
*block
)
9440 cs_base
->reachable_labels
= bitmap_alloc (&labels_obstack
);
9442 /* Collect labels in this block. We don't keep those corresponding
9443 to END {IF|SELECT}, these are checked in resolve_branch by going
9444 up through the code_stack. */
9445 for (c
= block
; c
; c
= c
->next
)
9447 if (c
->here
&& c
->op
!= EXEC_END_NESTED_BLOCK
)
9448 bitmap_set_bit (cs_base
->reachable_labels
, c
->here
->value
);
9451 /* Merge with labels from parent block. */
9454 gcc_assert (cs_base
->prev
->reachable_labels
);
9455 bitmap_ior_into (cs_base
->reachable_labels
,
9456 cs_base
->prev
->reachable_labels
);
9462 resolve_lock_unlock_event (gfc_code
*code
)
9464 if (code
->expr1
->expr_type
== EXPR_FUNCTION
9465 && code
->expr1
->value
.function
.isym
9466 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
9467 remove_caf_get_intrinsic (code
->expr1
);
9469 if ((code
->op
== EXEC_LOCK
|| code
->op
== EXEC_UNLOCK
)
9470 && (code
->expr1
->ts
.type
!= BT_DERIVED
9471 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9472 || code
->expr1
->ts
.u
.derived
->from_intmod
!= INTMOD_ISO_FORTRAN_ENV
9473 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
!= ISOFORTRAN_LOCK_TYPE
9474 || code
->expr1
->rank
!= 0
9475 || (!gfc_is_coarray (code
->expr1
) &&
9476 !gfc_is_coindexed (code
->expr1
))))
9477 gfc_error ("Lock variable at %L must be a scalar of type LOCK_TYPE",
9478 &code
->expr1
->where
);
9479 else if ((code
->op
== EXEC_EVENT_POST
|| code
->op
== EXEC_EVENT_WAIT
)
9480 && (code
->expr1
->ts
.type
!= BT_DERIVED
9481 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9482 || code
->expr1
->ts
.u
.derived
->from_intmod
9483 != INTMOD_ISO_FORTRAN_ENV
9484 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
9485 != ISOFORTRAN_EVENT_TYPE
9486 || code
->expr1
->rank
!= 0))
9487 gfc_error ("Event variable at %L must be a scalar of type EVENT_TYPE",
9488 &code
->expr1
->where
);
9489 else if (code
->op
== EXEC_EVENT_POST
&& !gfc_is_coarray (code
->expr1
)
9490 && !gfc_is_coindexed (code
->expr1
))
9491 gfc_error ("Event variable argument at %L must be a coarray or coindexed",
9492 &code
->expr1
->where
);
9493 else if (code
->op
== EXEC_EVENT_WAIT
&& !gfc_is_coarray (code
->expr1
))
9494 gfc_error ("Event variable argument at %L must be a coarray but not "
9495 "coindexed", &code
->expr1
->where
);
9499 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9500 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9501 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9502 &code
->expr2
->where
);
9505 && !gfc_check_vardef_context (code
->expr2
, false, false, false,
9506 _("STAT variable")))
9511 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9512 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9513 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9514 &code
->expr3
->where
);
9517 && !gfc_check_vardef_context (code
->expr3
, false, false, false,
9518 _("ERRMSG variable")))
9521 /* Check for LOCK the ACQUIRED_LOCK. */
9522 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9523 && (code
->expr4
->ts
.type
!= BT_LOGICAL
|| code
->expr4
->rank
!= 0
9524 || code
->expr4
->expr_type
!= EXPR_VARIABLE
))
9525 gfc_error ("ACQUIRED_LOCK= argument at %L must be a scalar LOGICAL "
9526 "variable", &code
->expr4
->where
);
9528 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9529 && !gfc_check_vardef_context (code
->expr4
, false, false, false,
9530 _("ACQUIRED_LOCK variable")))
9533 /* Check for EVENT WAIT the UNTIL_COUNT. */
9534 if (code
->op
== EXEC_EVENT_WAIT
&& code
->expr4
)
9536 if (!gfc_resolve_expr (code
->expr4
) || code
->expr4
->ts
.type
!= BT_INTEGER
9537 || code
->expr4
->rank
!= 0)
9538 gfc_error ("UNTIL_COUNT= argument at %L must be a scalar INTEGER "
9539 "expression", &code
->expr4
->where
);
9545 resolve_critical (gfc_code
*code
)
9547 gfc_symtree
*symtree
;
9548 gfc_symbol
*lock_type
;
9549 char name
[GFC_MAX_SYMBOL_LEN
];
9550 static int serial
= 0;
9552 if (flag_coarray
!= GFC_FCOARRAY_LIB
)
9555 symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
9556 GFC_PREFIX ("lock_type"));
9558 lock_type
= symtree
->n
.sym
;
9561 if (gfc_get_sym_tree (GFC_PREFIX ("lock_type"), gfc_current_ns
, &symtree
,
9564 lock_type
= symtree
->n
.sym
;
9565 lock_type
->attr
.flavor
= FL_DERIVED
;
9566 lock_type
->attr
.zero_comp
= 1;
9567 lock_type
->from_intmod
= INTMOD_ISO_FORTRAN_ENV
;
9568 lock_type
->intmod_sym_id
= ISOFORTRAN_LOCK_TYPE
;
9571 sprintf(name
, GFC_PREFIX ("lock_var") "%d",serial
++);
9572 if (gfc_get_sym_tree (name
, gfc_current_ns
, &symtree
, false) != 0)
9575 code
->resolved_sym
= symtree
->n
.sym
;
9576 symtree
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
9577 symtree
->n
.sym
->attr
.referenced
= 1;
9578 symtree
->n
.sym
->attr
.artificial
= 1;
9579 symtree
->n
.sym
->attr
.codimension
= 1;
9580 symtree
->n
.sym
->ts
.type
= BT_DERIVED
;
9581 symtree
->n
.sym
->ts
.u
.derived
= lock_type
;
9582 symtree
->n
.sym
->as
= gfc_get_array_spec ();
9583 symtree
->n
.sym
->as
->corank
= 1;
9584 symtree
->n
.sym
->as
->type
= AS_EXPLICIT
;
9585 symtree
->n
.sym
->as
->cotype
= AS_EXPLICIT
;
9586 symtree
->n
.sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
,
9588 gfc_commit_symbols();
9593 resolve_sync (gfc_code
*code
)
9595 /* Check imageset. The * case matches expr1 == NULL. */
9598 if (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
> 1)
9599 gfc_error ("Imageset argument at %L must be a scalar or rank-1 "
9600 "INTEGER expression", &code
->expr1
->where
);
9601 if (code
->expr1
->expr_type
== EXPR_CONSTANT
&& code
->expr1
->rank
== 0
9602 && mpz_cmp_si (code
->expr1
->value
.integer
, 1) < 0)
9603 gfc_error ("Imageset argument at %L must between 1 and num_images()",
9604 &code
->expr1
->where
);
9605 else if (code
->expr1
->expr_type
== EXPR_ARRAY
9606 && gfc_simplify_expr (code
->expr1
, 0))
9608 gfc_constructor
*cons
;
9609 cons
= gfc_constructor_first (code
->expr1
->value
.constructor
);
9610 for (; cons
; cons
= gfc_constructor_next (cons
))
9611 if (cons
->expr
->expr_type
== EXPR_CONSTANT
9612 && mpz_cmp_si (cons
->expr
->value
.integer
, 1) < 0)
9613 gfc_error ("Imageset argument at %L must between 1 and "
9614 "num_images()", &cons
->expr
->where
);
9619 gfc_resolve_expr (code
->expr2
);
9621 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9622 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9623 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9624 &code
->expr2
->where
);
9627 gfc_resolve_expr (code
->expr3
);
9629 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9630 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9631 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9632 &code
->expr3
->where
);
9636 /* Given a branch to a label, see if the branch is conforming.
9637 The code node describes where the branch is located. */
9640 resolve_branch (gfc_st_label
*label
, gfc_code
*code
)
9647 /* Step one: is this a valid branching target? */
9649 if (label
->defined
== ST_LABEL_UNKNOWN
)
9651 gfc_error ("Label %d referenced at %L is never defined", label
->value
,
9656 if (label
->defined
!= ST_LABEL_TARGET
&& label
->defined
!= ST_LABEL_DO_TARGET
)
9658 gfc_error ("Statement at %L is not a valid branch target statement "
9659 "for the branch statement at %L", &label
->where
, &code
->loc
);
9663 /* Step two: make sure this branch is not a branch to itself ;-) */
9665 if (code
->here
== label
)
9668 "Branch at %L may result in an infinite loop", &code
->loc
);
9672 /* Step three: See if the label is in the same block as the
9673 branching statement. The hard work has been done by setting up
9674 the bitmap reachable_labels. */
9676 if (bitmap_bit_p (cs_base
->reachable_labels
, label
->value
))
9678 /* Check now whether there is a CRITICAL construct; if so, check
9679 whether the label is still visible outside of the CRITICAL block,
9680 which is invalid. */
9681 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9683 if (stack
->current
->op
== EXEC_CRITICAL
9684 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9685 gfc_error ("GOTO statement at %L leaves CRITICAL construct for "
9686 "label at %L", &code
->loc
, &label
->where
);
9687 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
9688 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9689 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct "
9690 "for label at %L", &code
->loc
, &label
->where
);
9696 /* Step four: If we haven't found the label in the bitmap, it may
9697 still be the label of the END of the enclosing block, in which
9698 case we find it by going up the code_stack. */
9700 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9702 if (stack
->current
->next
&& stack
->current
->next
->here
== label
)
9704 if (stack
->current
->op
== EXEC_CRITICAL
)
9706 /* Note: A label at END CRITICAL does not leave the CRITICAL
9707 construct as END CRITICAL is still part of it. */
9708 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
9709 " at %L", &code
->loc
, &label
->where
);
9712 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
)
9714 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct for "
9715 "label at %L", &code
->loc
, &label
->where
);
9722 gcc_assert (stack
->current
->next
->op
== EXEC_END_NESTED_BLOCK
);
9726 /* The label is not in an enclosing block, so illegal. This was
9727 allowed in Fortran 66, so we allow it as extension. No
9728 further checks are necessary in this case. */
9729 gfc_notify_std (GFC_STD_LEGACY
, "Label at %L is not in the same block "
9730 "as the GOTO statement at %L", &label
->where
,
9736 /* Check whether EXPR1 has the same shape as EXPR2. */
9739 resolve_where_shape (gfc_expr
*expr1
, gfc_expr
*expr2
)
9741 mpz_t shape
[GFC_MAX_DIMENSIONS
];
9742 mpz_t shape2
[GFC_MAX_DIMENSIONS
];
9743 bool result
= false;
9746 /* Compare the rank. */
9747 if (expr1
->rank
!= expr2
->rank
)
9750 /* Compare the size of each dimension. */
9751 for (i
=0; i
<expr1
->rank
; i
++)
9753 if (!gfc_array_dimen_size (expr1
, i
, &shape
[i
]))
9756 if (!gfc_array_dimen_size (expr2
, i
, &shape2
[i
]))
9759 if (mpz_cmp (shape
[i
], shape2
[i
]))
9763 /* When either of the two expression is an assumed size array, we
9764 ignore the comparison of dimension sizes. */
9769 gfc_clear_shape (shape
, i
);
9770 gfc_clear_shape (shape2
, i
);
9775 /* Check whether a WHERE assignment target or a WHERE mask expression
9776 has the same shape as the outmost WHERE mask expression. */
9779 resolve_where (gfc_code
*code
, gfc_expr
*mask
)
9785 cblock
= code
->block
;
9787 /* Store the first WHERE mask-expr of the WHERE statement or construct.
9788 In case of nested WHERE, only the outmost one is stored. */
9789 if (mask
== NULL
) /* outmost WHERE */
9791 else /* inner WHERE */
9798 /* Check if the mask-expr has a consistent shape with the
9799 outmost WHERE mask-expr. */
9800 if (!resolve_where_shape (cblock
->expr1
, e
))
9801 gfc_error ("WHERE mask at %L has inconsistent shape",
9802 &cblock
->expr1
->where
);
9805 /* the assignment statement of a WHERE statement, or the first
9806 statement in where-body-construct of a WHERE construct */
9807 cnext
= cblock
->next
;
9812 /* WHERE assignment statement */
9815 /* Check shape consistent for WHERE assignment target. */
9816 if (e
&& !resolve_where_shape (cnext
->expr1
, e
))
9817 gfc_error ("WHERE assignment target at %L has "
9818 "inconsistent shape", &cnext
->expr1
->where
);
9822 case EXEC_ASSIGN_CALL
:
9823 resolve_call (cnext
);
9824 if (!cnext
->resolved_sym
->attr
.elemental
)
9825 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9826 &cnext
->ext
.actual
->expr
->where
);
9829 /* WHERE or WHERE construct is part of a where-body-construct */
9831 resolve_where (cnext
, e
);
9835 gfc_error ("Unsupported statement inside WHERE at %L",
9838 /* the next statement within the same where-body-construct */
9839 cnext
= cnext
->next
;
9841 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
9842 cblock
= cblock
->block
;
9847 /* Resolve assignment in FORALL construct.
9848 NVAR is the number of FORALL index variables, and VAR_EXPR records the
9849 FORALL index variables. */
9852 gfc_resolve_assign_in_forall (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
9856 for (n
= 0; n
< nvar
; n
++)
9858 gfc_symbol
*forall_index
;
9860 forall_index
= var_expr
[n
]->symtree
->n
.sym
;
9862 /* Check whether the assignment target is one of the FORALL index
9864 if ((code
->expr1
->expr_type
== EXPR_VARIABLE
)
9865 && (code
->expr1
->symtree
->n
.sym
== forall_index
))
9866 gfc_error ("Assignment to a FORALL index variable at %L",
9867 &code
->expr1
->where
);
9870 /* If one of the FORALL index variables doesn't appear in the
9871 assignment variable, then there could be a many-to-one
9872 assignment. Emit a warning rather than an error because the
9873 mask could be resolving this problem. */
9874 if (!find_forall_index (code
->expr1
, forall_index
, 0))
9875 gfc_warning (0, "The FORALL with index %qs is not used on the "
9876 "left side of the assignment at %L and so might "
9877 "cause multiple assignment to this object",
9878 var_expr
[n
]->symtree
->name
, &code
->expr1
->where
);
9884 /* Resolve WHERE statement in FORALL construct. */
9887 gfc_resolve_where_code_in_forall (gfc_code
*code
, int nvar
,
9888 gfc_expr
**var_expr
)
9893 cblock
= code
->block
;
9896 /* the assignment statement of a WHERE statement, or the first
9897 statement in where-body-construct of a WHERE construct */
9898 cnext
= cblock
->next
;
9903 /* WHERE assignment statement */
9905 gfc_resolve_assign_in_forall (cnext
, nvar
, var_expr
);
9908 /* WHERE operator assignment statement */
9909 case EXEC_ASSIGN_CALL
:
9910 resolve_call (cnext
);
9911 if (!cnext
->resolved_sym
->attr
.elemental
)
9912 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9913 &cnext
->ext
.actual
->expr
->where
);
9916 /* WHERE or WHERE construct is part of a where-body-construct */
9918 gfc_resolve_where_code_in_forall (cnext
, nvar
, var_expr
);
9922 gfc_error ("Unsupported statement inside WHERE at %L",
9925 /* the next statement within the same where-body-construct */
9926 cnext
= cnext
->next
;
9928 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
9929 cblock
= cblock
->block
;
9934 /* Traverse the FORALL body to check whether the following errors exist:
9935 1. For assignment, check if a many-to-one assignment happens.
9936 2. For WHERE statement, check the WHERE body to see if there is any
9937 many-to-one assignment. */
9940 gfc_resolve_forall_body (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
9944 c
= code
->block
->next
;
9950 case EXEC_POINTER_ASSIGN
:
9951 gfc_resolve_assign_in_forall (c
, nvar
, var_expr
);
9954 case EXEC_ASSIGN_CALL
:
9958 /* Because the gfc_resolve_blocks() will handle the nested FORALL,
9959 there is no need to handle it here. */
9963 gfc_resolve_where_code_in_forall(c
, nvar
, var_expr
);
9968 /* The next statement in the FORALL body. */
9974 /* Counts the number of iterators needed inside a forall construct, including
9975 nested forall constructs. This is used to allocate the needed memory
9976 in gfc_resolve_forall. */
9979 gfc_count_forall_iterators (gfc_code
*code
)
9981 int max_iters
, sub_iters
, current_iters
;
9982 gfc_forall_iterator
*fa
;
9984 gcc_assert(code
->op
== EXEC_FORALL
);
9988 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
9991 code
= code
->block
->next
;
9995 if (code
->op
== EXEC_FORALL
)
9997 sub_iters
= gfc_count_forall_iterators (code
);
9998 if (sub_iters
> max_iters
)
9999 max_iters
= sub_iters
;
10004 return current_iters
+ max_iters
;
10008 /* Given a FORALL construct, first resolve the FORALL iterator, then call
10009 gfc_resolve_forall_body to resolve the FORALL body. */
10012 gfc_resolve_forall (gfc_code
*code
, gfc_namespace
*ns
, int forall_save
)
10014 static gfc_expr
**var_expr
;
10015 static int total_var
= 0;
10016 static int nvar
= 0;
10017 int i
, old_nvar
, tmp
;
10018 gfc_forall_iterator
*fa
;
10022 if (!gfc_notify_std (GFC_STD_F2018_OBS
, "FORALL construct at %L", &code
->loc
))
10025 /* Start to resolve a FORALL construct */
10026 if (forall_save
== 0)
10028 /* Count the total number of FORALL indices in the nested FORALL
10029 construct in order to allocate the VAR_EXPR with proper size. */
10030 total_var
= gfc_count_forall_iterators (code
);
10032 /* Allocate VAR_EXPR with NUMBER_OF_FORALL_INDEX elements. */
10033 var_expr
= XCNEWVEC (gfc_expr
*, total_var
);
10036 /* The information about FORALL iterator, including FORALL indices start, end
10037 and stride. An outer FORALL indice cannot appear in start, end or stride. */
10038 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10040 /* Fortran 20008: C738 (R753). */
10041 if (fa
->var
->ref
&& fa
->var
->ref
->type
== REF_ARRAY
)
10043 gfc_error ("FORALL index-name at %L must be a scalar variable "
10044 "of type integer", &fa
->var
->where
);
10048 /* Check if any outer FORALL index name is the same as the current
10050 for (i
= 0; i
< nvar
; i
++)
10052 if (fa
->var
->symtree
->n
.sym
== var_expr
[i
]->symtree
->n
.sym
)
10053 gfc_error ("An outer FORALL construct already has an index "
10054 "with this name %L", &fa
->var
->where
);
10057 /* Record the current FORALL index. */
10058 var_expr
[nvar
] = gfc_copy_expr (fa
->var
);
10062 /* No memory leak. */
10063 gcc_assert (nvar
<= total_var
);
10066 /* Resolve the FORALL body. */
10067 gfc_resolve_forall_body (code
, nvar
, var_expr
);
10069 /* May call gfc_resolve_forall to resolve the inner FORALL loop. */
10070 gfc_resolve_blocks (code
->block
, ns
);
10074 /* Free only the VAR_EXPRs allocated in this frame. */
10075 for (i
= nvar
; i
< tmp
; i
++)
10076 gfc_free_expr (var_expr
[i
]);
10080 /* We are in the outermost FORALL construct. */
10081 gcc_assert (forall_save
== 0);
10083 /* VAR_EXPR is not needed any more. */
10090 /* Resolve a BLOCK construct statement. */
10093 resolve_block_construct (gfc_code
* code
)
10095 /* Resolve the BLOCK's namespace. */
10096 gfc_resolve (code
->ext
.block
.ns
);
10098 /* For an ASSOCIATE block, the associations (and their targets) are already
10099 resolved during resolve_symbol. */
10103 /* Resolve lists of blocks found in IF, SELECT CASE, WHERE, FORALL, GOTO and
10107 gfc_resolve_blocks (gfc_code
*b
, gfc_namespace
*ns
)
10111 for (; b
; b
= b
->block
)
10113 t
= gfc_resolve_expr (b
->expr1
);
10114 if (!gfc_resolve_expr (b
->expr2
))
10120 if (t
&& b
->expr1
!= NULL
10121 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
!= 0))
10122 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
10128 && b
->expr1
!= NULL
10129 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
== 0))
10130 gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
10135 resolve_branch (b
->label1
, b
);
10139 resolve_block_construct (b
);
10143 case EXEC_SELECT_TYPE
:
10146 case EXEC_DO_WHILE
:
10147 case EXEC_DO_CONCURRENT
:
10148 case EXEC_CRITICAL
:
10151 case EXEC_IOLENGTH
:
10155 case EXEC_OMP_ATOMIC
:
10156 case EXEC_OACC_ATOMIC
:
10158 gfc_omp_atomic_op aop
10159 = (gfc_omp_atomic_op
) (b
->ext
.omp_atomic
& GFC_OMP_ATOMIC_MASK
);
10161 /* Verify this before calling gfc_resolve_code, which might
10163 gcc_assert (b
->next
&& b
->next
->op
== EXEC_ASSIGN
);
10164 gcc_assert (((aop
!= GFC_OMP_ATOMIC_CAPTURE
)
10165 && b
->next
->next
== NULL
)
10166 || ((aop
== GFC_OMP_ATOMIC_CAPTURE
)
10167 && b
->next
->next
!= NULL
10168 && b
->next
->next
->op
== EXEC_ASSIGN
10169 && b
->next
->next
->next
== NULL
));
10173 case EXEC_OACC_PARALLEL_LOOP
:
10174 case EXEC_OACC_PARALLEL
:
10175 case EXEC_OACC_KERNELS_LOOP
:
10176 case EXEC_OACC_KERNELS
:
10177 case EXEC_OACC_DATA
:
10178 case EXEC_OACC_HOST_DATA
:
10179 case EXEC_OACC_LOOP
:
10180 case EXEC_OACC_UPDATE
:
10181 case EXEC_OACC_WAIT
:
10182 case EXEC_OACC_CACHE
:
10183 case EXEC_OACC_ENTER_DATA
:
10184 case EXEC_OACC_EXIT_DATA
:
10185 case EXEC_OACC_ROUTINE
:
10186 case EXEC_OMP_CRITICAL
:
10187 case EXEC_OMP_DISTRIBUTE
:
10188 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
10189 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
10190 case EXEC_OMP_DISTRIBUTE_SIMD
:
10192 case EXEC_OMP_DO_SIMD
:
10193 case EXEC_OMP_MASTER
:
10194 case EXEC_OMP_ORDERED
:
10195 case EXEC_OMP_PARALLEL
:
10196 case EXEC_OMP_PARALLEL_DO
:
10197 case EXEC_OMP_PARALLEL_DO_SIMD
:
10198 case EXEC_OMP_PARALLEL_SECTIONS
:
10199 case EXEC_OMP_PARALLEL_WORKSHARE
:
10200 case EXEC_OMP_SECTIONS
:
10201 case EXEC_OMP_SIMD
:
10202 case EXEC_OMP_SINGLE
:
10203 case EXEC_OMP_TARGET
:
10204 case EXEC_OMP_TARGET_DATA
:
10205 case EXEC_OMP_TARGET_ENTER_DATA
:
10206 case EXEC_OMP_TARGET_EXIT_DATA
:
10207 case EXEC_OMP_TARGET_PARALLEL
:
10208 case EXEC_OMP_TARGET_PARALLEL_DO
:
10209 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
10210 case EXEC_OMP_TARGET_SIMD
:
10211 case EXEC_OMP_TARGET_TEAMS
:
10212 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
10213 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10214 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10215 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
10216 case EXEC_OMP_TARGET_UPDATE
:
10217 case EXEC_OMP_TASK
:
10218 case EXEC_OMP_TASKGROUP
:
10219 case EXEC_OMP_TASKLOOP
:
10220 case EXEC_OMP_TASKLOOP_SIMD
:
10221 case EXEC_OMP_TASKWAIT
:
10222 case EXEC_OMP_TASKYIELD
:
10223 case EXEC_OMP_TEAMS
:
10224 case EXEC_OMP_TEAMS_DISTRIBUTE
:
10225 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10226 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10227 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
10228 case EXEC_OMP_WORKSHARE
:
10232 gfc_internal_error ("gfc_resolve_blocks(): Bad block type");
10235 gfc_resolve_code (b
->next
, ns
);
10240 /* Does everything to resolve an ordinary assignment. Returns true
10241 if this is an interface assignment. */
10243 resolve_ordinary_assign (gfc_code
*code
, gfc_namespace
*ns
)
10250 symbol_attribute attr
;
10252 if (gfc_extend_assign (code
, ns
))
10256 if (code
->op
== EXEC_ASSIGN_CALL
)
10258 lhs
= code
->ext
.actual
->expr
;
10259 rhsptr
= &code
->ext
.actual
->next
->expr
;
10263 gfc_actual_arglist
* args
;
10264 gfc_typebound_proc
* tbp
;
10266 gcc_assert (code
->op
== EXEC_COMPCALL
);
10268 args
= code
->expr1
->value
.compcall
.actual
;
10270 rhsptr
= &args
->next
->expr
;
10272 tbp
= code
->expr1
->value
.compcall
.tbp
;
10273 gcc_assert (!tbp
->is_generic
);
10276 /* Make a temporary rhs when there is a default initializer
10277 and rhs is the same symbol as the lhs. */
10278 if ((*rhsptr
)->expr_type
== EXPR_VARIABLE
10279 && (*rhsptr
)->symtree
->n
.sym
->ts
.type
== BT_DERIVED
10280 && gfc_has_default_initializer ((*rhsptr
)->symtree
->n
.sym
->ts
.u
.derived
)
10281 && (lhs
->symtree
->n
.sym
== (*rhsptr
)->symtree
->n
.sym
))
10282 *rhsptr
= gfc_get_parentheses (*rhsptr
);
10291 && !gfc_notify_std (GFC_STD_GNU
, "BOZ literal at %L outside "
10292 "a DATA statement and outside INT/REAL/DBLE/CMPLX",
10296 /* Handle the case of a BOZ literal on the RHS. */
10297 if (rhs
->is_boz
&& lhs
->ts
.type
!= BT_INTEGER
)
10300 if (warn_surprising
)
10301 gfc_warning (OPT_Wsurprising
,
10302 "BOZ literal at %L is bitwise transferred "
10303 "non-integer symbol %qs", &code
->loc
,
10304 lhs
->symtree
->n
.sym
->name
);
10306 if (!gfc_convert_boz (rhs
, &lhs
->ts
))
10308 if ((rc
= gfc_range_check (rhs
)) != ARITH_OK
)
10310 if (rc
== ARITH_UNDERFLOW
)
10311 gfc_error ("Arithmetic underflow of bit-wise transferred BOZ at %L"
10312 ". This check can be disabled with the option "
10313 "%<-fno-range-check%>", &rhs
->where
);
10314 else if (rc
== ARITH_OVERFLOW
)
10315 gfc_error ("Arithmetic overflow of bit-wise transferred BOZ at %L"
10316 ". This check can be disabled with the option "
10317 "%<-fno-range-check%>", &rhs
->where
);
10318 else if (rc
== ARITH_NAN
)
10319 gfc_error ("Arithmetic NaN of bit-wise transferred BOZ at %L"
10320 ". This check can be disabled with the option "
10321 "%<-fno-range-check%>", &rhs
->where
);
10326 if (lhs
->ts
.type
== BT_CHARACTER
10327 && warn_character_truncation
)
10329 HOST_WIDE_INT llen
= 0, rlen
= 0;
10330 if (lhs
->ts
.u
.cl
!= NULL
10331 && lhs
->ts
.u
.cl
->length
!= NULL
10332 && lhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10333 llen
= gfc_mpz_get_hwi (lhs
->ts
.u
.cl
->length
->value
.integer
);
10335 if (rhs
->expr_type
== EXPR_CONSTANT
)
10336 rlen
= rhs
->value
.character
.length
;
10338 else if (rhs
->ts
.u
.cl
!= NULL
10339 && rhs
->ts
.u
.cl
->length
!= NULL
10340 && rhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10341 rlen
= gfc_mpz_get_hwi (rhs
->ts
.u
.cl
->length
->value
.integer
);
10343 if (rlen
&& llen
&& rlen
> llen
)
10344 gfc_warning_now (OPT_Wcharacter_truncation
,
10345 "CHARACTER expression will be truncated "
10346 "in assignment (%ld/%ld) at %L",
10347 (long) llen
, (long) rlen
, &code
->loc
);
10350 /* Ensure that a vector index expression for the lvalue is evaluated
10351 to a temporary if the lvalue symbol is referenced in it. */
10354 for (ref
= lhs
->ref
; ref
; ref
= ref
->next
)
10355 if (ref
->type
== REF_ARRAY
)
10357 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
10358 if (ref
->u
.ar
.dimen_type
[n
] == DIMEN_VECTOR
10359 && gfc_find_sym_in_expr (lhs
->symtree
->n
.sym
,
10360 ref
->u
.ar
.start
[n
]))
10362 = gfc_get_parentheses (ref
->u
.ar
.start
[n
]);
10366 if (gfc_pure (NULL
))
10368 if (lhs
->ts
.type
== BT_DERIVED
10369 && lhs
->expr_type
== EXPR_VARIABLE
10370 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10371 && rhs
->expr_type
== EXPR_VARIABLE
10372 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10373 || gfc_is_coindexed (rhs
)))
10375 /* F2008, C1283. */
10376 if (gfc_is_coindexed (rhs
))
10377 gfc_error ("Coindexed expression at %L is assigned to "
10378 "a derived type variable with a POINTER "
10379 "component in a PURE procedure",
10382 gfc_error ("The impure variable at %L is assigned to "
10383 "a derived type variable with a POINTER "
10384 "component in a PURE procedure (12.6)",
10389 /* Fortran 2008, C1283. */
10390 if (gfc_is_coindexed (lhs
))
10392 gfc_error ("Assignment to coindexed variable at %L in a PURE "
10393 "procedure", &rhs
->where
);
10398 if (gfc_implicit_pure (NULL
))
10400 if (lhs
->expr_type
== EXPR_VARIABLE
10401 && lhs
->symtree
->n
.sym
!= gfc_current_ns
->proc_name
10402 && lhs
->symtree
->n
.sym
->ns
!= gfc_current_ns
)
10403 gfc_unset_implicit_pure (NULL
);
10405 if (lhs
->ts
.type
== BT_DERIVED
10406 && lhs
->expr_type
== EXPR_VARIABLE
10407 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10408 && rhs
->expr_type
== EXPR_VARIABLE
10409 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10410 || gfc_is_coindexed (rhs
)))
10411 gfc_unset_implicit_pure (NULL
);
10413 /* Fortran 2008, C1283. */
10414 if (gfc_is_coindexed (lhs
))
10415 gfc_unset_implicit_pure (NULL
);
10418 /* F2008, 7.2.1.2. */
10419 attr
= gfc_expr_attr (lhs
);
10420 if (lhs
->ts
.type
== BT_CLASS
&& attr
.allocatable
)
10422 if (attr
.codimension
)
10424 gfc_error ("Assignment to polymorphic coarray at %L is not "
10425 "permitted", &lhs
->where
);
10428 if (!gfc_notify_std (GFC_STD_F2008
, "Assignment to an allocatable "
10429 "polymorphic variable at %L", &lhs
->where
))
10431 if (!flag_realloc_lhs
)
10433 gfc_error ("Assignment to an allocatable polymorphic variable at %L "
10434 "requires %<-frealloc-lhs%>", &lhs
->where
);
10438 else if (lhs
->ts
.type
== BT_CLASS
)
10440 gfc_error ("Nonallocatable variable must not be polymorphic in intrinsic "
10441 "assignment at %L - check that there is a matching specific "
10442 "subroutine for '=' operator", &lhs
->where
);
10446 bool lhs_coindexed
= gfc_is_coindexed (lhs
);
10448 /* F2008, Section 7.2.1.2. */
10449 if (lhs_coindexed
&& gfc_has_ultimate_allocatable (lhs
))
10451 gfc_error ("Coindexed variable must not have an allocatable ultimate "
10452 "component in assignment at %L", &lhs
->where
);
10456 /* Assign the 'data' of a class object to a derived type. */
10457 if (lhs
->ts
.type
== BT_DERIVED
10458 && rhs
->ts
.type
== BT_CLASS
10459 && rhs
->expr_type
!= EXPR_ARRAY
)
10460 gfc_add_data_component (rhs
);
10462 /* Make sure there is a vtable and, in particular, a _copy for the
10464 if (UNLIMITED_POLY (lhs
) && lhs
->rank
&& rhs
->ts
.type
!= BT_CLASS
)
10465 gfc_find_vtab (&rhs
->ts
);
10467 bool caf_convert_to_send
= flag_coarray
== GFC_FCOARRAY_LIB
10469 || (code
->expr2
->expr_type
== EXPR_FUNCTION
10470 && code
->expr2
->value
.function
.isym
10471 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
10472 && (code
->expr1
->rank
== 0 || code
->expr2
->rank
!= 0)
10473 && !gfc_expr_attr (rhs
).allocatable
10474 && !gfc_has_vector_subscript (rhs
)));
10476 gfc_check_assign (lhs
, rhs
, 1, !caf_convert_to_send
);
10478 /* Insert a GFC_ISYM_CAF_SEND intrinsic, when the LHS is a coindexed variable.
10479 Additionally, insert this code when the RHS is a CAF as we then use the
10480 GFC_ISYM_CAF_SEND intrinsic just to avoid a temporary; but do not do so if
10481 the LHS is (re)allocatable or has a vector subscript. If the LHS is a
10482 noncoindexed array and the RHS is a coindexed scalar, use the normal code
10484 if (caf_convert_to_send
)
10486 if (code
->expr2
->expr_type
== EXPR_FUNCTION
10487 && code
->expr2
->value
.function
.isym
10488 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
10489 remove_caf_get_intrinsic (code
->expr2
);
10490 code
->op
= EXEC_CALL
;
10491 gfc_get_sym_tree (GFC_PREFIX ("caf_send"), ns
, &code
->symtree
, true);
10492 code
->resolved_sym
= code
->symtree
->n
.sym
;
10493 code
->resolved_sym
->attr
.flavor
= FL_PROCEDURE
;
10494 code
->resolved_sym
->attr
.intrinsic
= 1;
10495 code
->resolved_sym
->attr
.subroutine
= 1;
10496 code
->resolved_isym
= gfc_intrinsic_subroutine_by_id (GFC_ISYM_CAF_SEND
);
10497 gfc_commit_symbol (code
->resolved_sym
);
10498 code
->ext
.actual
= gfc_get_actual_arglist ();
10499 code
->ext
.actual
->expr
= lhs
;
10500 code
->ext
.actual
->next
= gfc_get_actual_arglist ();
10501 code
->ext
.actual
->next
->expr
= rhs
;
10502 code
->expr1
= NULL
;
10503 code
->expr2
= NULL
;
10510 /* Add a component reference onto an expression. */
10513 add_comp_ref (gfc_expr
*e
, gfc_component
*c
)
10518 ref
= &((*ref
)->next
);
10519 *ref
= gfc_get_ref ();
10520 (*ref
)->type
= REF_COMPONENT
;
10521 (*ref
)->u
.c
.sym
= e
->ts
.u
.derived
;
10522 (*ref
)->u
.c
.component
= c
;
10525 /* Add a full array ref, as necessary. */
10528 gfc_add_full_array_ref (e
, c
->as
);
10529 e
->rank
= c
->as
->rank
;
10534 /* Build an assignment. Keep the argument 'op' for future use, so that
10535 pointer assignments can be made. */
10538 build_assignment (gfc_exec_op op
, gfc_expr
*expr1
, gfc_expr
*expr2
,
10539 gfc_component
*comp1
, gfc_component
*comp2
, locus loc
)
10541 gfc_code
*this_code
;
10543 this_code
= gfc_get_code (op
);
10544 this_code
->next
= NULL
;
10545 this_code
->expr1
= gfc_copy_expr (expr1
);
10546 this_code
->expr2
= gfc_copy_expr (expr2
);
10547 this_code
->loc
= loc
;
10548 if (comp1
&& comp2
)
10550 add_comp_ref (this_code
->expr1
, comp1
);
10551 add_comp_ref (this_code
->expr2
, comp2
);
10558 /* Makes a temporary variable expression based on the characteristics of
10559 a given variable expression. */
10562 get_temp_from_expr (gfc_expr
*e
, gfc_namespace
*ns
)
10564 static int serial
= 0;
10565 char name
[GFC_MAX_SYMBOL_LEN
];
10567 gfc_array_spec
*as
;
10568 gfc_array_ref
*aref
;
10571 sprintf (name
, GFC_PREFIX("DA%d"), serial
++);
10572 gfc_get_sym_tree (name
, ns
, &tmp
, false);
10573 gfc_add_type (tmp
->n
.sym
, &e
->ts
, NULL
);
10579 /* Obtain the arrayspec for the temporary. */
10580 if (e
->rank
&& e
->expr_type
!= EXPR_ARRAY
10581 && e
->expr_type
!= EXPR_FUNCTION
10582 && e
->expr_type
!= EXPR_OP
)
10584 aref
= gfc_find_array_ref (e
);
10585 if (e
->expr_type
== EXPR_VARIABLE
10586 && e
->symtree
->n
.sym
->as
== aref
->as
)
10590 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
10591 if (ref
->type
== REF_COMPONENT
10592 && ref
->u
.c
.component
->as
== aref
->as
)
10600 /* Add the attributes and the arrayspec to the temporary. */
10601 tmp
->n
.sym
->attr
= gfc_expr_attr (e
);
10602 tmp
->n
.sym
->attr
.function
= 0;
10603 tmp
->n
.sym
->attr
.result
= 0;
10604 tmp
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
10605 tmp
->n
.sym
->attr
.dummy
= 0;
10606 tmp
->n
.sym
->attr
.intent
= INTENT_UNKNOWN
;
10610 tmp
->n
.sym
->as
= gfc_copy_array_spec (as
);
10613 if (as
->type
== AS_DEFERRED
)
10614 tmp
->n
.sym
->attr
.allocatable
= 1;
10616 else if (e
->rank
&& (e
->expr_type
== EXPR_ARRAY
10617 || e
->expr_type
== EXPR_FUNCTION
10618 || e
->expr_type
== EXPR_OP
))
10620 tmp
->n
.sym
->as
= gfc_get_array_spec ();
10621 tmp
->n
.sym
->as
->type
= AS_DEFERRED
;
10622 tmp
->n
.sym
->as
->rank
= e
->rank
;
10623 tmp
->n
.sym
->attr
.allocatable
= 1;
10624 tmp
->n
.sym
->attr
.dimension
= 1;
10627 tmp
->n
.sym
->attr
.dimension
= 0;
10629 gfc_set_sym_referenced (tmp
->n
.sym
);
10630 gfc_commit_symbol (tmp
->n
.sym
);
10631 e
= gfc_lval_expr_from_sym (tmp
->n
.sym
);
10633 /* Should the lhs be a section, use its array ref for the
10634 temporary expression. */
10635 if (aref
&& aref
->type
!= AR_FULL
)
10637 gfc_free_ref_list (e
->ref
);
10638 e
->ref
= gfc_copy_ref (ref
);
10644 /* Add one line of code to the code chain, making sure that 'head' and
10645 'tail' are appropriately updated. */
10648 add_code_to_chain (gfc_code
**this_code
, gfc_code
**head
, gfc_code
**tail
)
10650 gcc_assert (this_code
);
10652 *head
= *tail
= *this_code
;
10654 *tail
= gfc_append_code (*tail
, *this_code
);
10659 /* Counts the potential number of part array references that would
10660 result from resolution of typebound defined assignments. */
10663 nonscalar_typebound_assign (gfc_symbol
*derived
, int depth
)
10666 int c_depth
= 0, t_depth
;
10668 for (c
= derived
->components
; c
; c
= c
->next
)
10670 if ((!gfc_bt_struct (c
->ts
.type
)
10672 || c
->attr
.allocatable
10673 || c
->attr
.proc_pointer_comp
10674 || c
->attr
.class_pointer
10675 || c
->attr
.proc_pointer
)
10676 && !c
->attr
.defined_assign_comp
)
10679 if (c
->as
&& c_depth
== 0)
10682 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
10683 t_depth
= nonscalar_typebound_assign (c
->ts
.u
.derived
,
10688 c_depth
= t_depth
> c_depth
? t_depth
: c_depth
;
10690 return depth
+ c_depth
;
10694 /* Implement 7.2.1.3 of the F08 standard:
10695 "An intrinsic assignment where the variable is of derived type is
10696 performed as if each component of the variable were assigned from the
10697 corresponding component of expr using pointer assignment (7.2.2) for
10698 each pointer component, defined assignment for each nonpointer
10699 nonallocatable component of a type that has a type-bound defined
10700 assignment consistent with the component, intrinsic assignment for
10701 each other nonpointer nonallocatable component, ..."
10703 The pointer assignments are taken care of by the intrinsic
10704 assignment of the structure itself. This function recursively adds
10705 defined assignments where required. The recursion is accomplished
10706 by calling gfc_resolve_code.
10708 When the lhs in a defined assignment has intent INOUT, we need a
10709 temporary for the lhs. In pseudo-code:
10711 ! Only call function lhs once.
10712 if (lhs is not a constant or an variable)
10715 ! Do the intrinsic assignment
10717 ! Now do the defined assignments
10718 do over components with typebound defined assignment [%cmp]
10719 #if one component's assignment procedure is INOUT
10721 #if expr2 non-variable
10727 t1%cmp {defined=} expr2%cmp
10733 expr1%cmp {defined=} expr2%cmp
10737 /* The temporary assignments have to be put on top of the additional
10738 code to avoid the result being changed by the intrinsic assignment.
10740 static int component_assignment_level
= 0;
10741 static gfc_code
*tmp_head
= NULL
, *tmp_tail
= NULL
;
10744 generate_component_assignments (gfc_code
**code
, gfc_namespace
*ns
)
10746 gfc_component
*comp1
, *comp2
;
10747 gfc_code
*this_code
= NULL
, *head
= NULL
, *tail
= NULL
;
10749 int error_count
, depth
;
10751 gfc_get_errors (NULL
, &error_count
);
10753 /* Filter out continuing processing after an error. */
10755 || (*code
)->expr1
->ts
.type
!= BT_DERIVED
10756 || (*code
)->expr2
->ts
.type
!= BT_DERIVED
)
10759 /* TODO: Handle more than one part array reference in assignments. */
10760 depth
= nonscalar_typebound_assign ((*code
)->expr1
->ts
.u
.derived
,
10761 (*code
)->expr1
->rank
? 1 : 0);
10764 gfc_warning (0, "TODO: type-bound defined assignment(s) at %L not "
10765 "done because multiple part array references would "
10766 "occur in intermediate expressions.", &(*code
)->loc
);
10770 component_assignment_level
++;
10772 /* Create a temporary so that functions get called only once. */
10773 if ((*code
)->expr2
->expr_type
!= EXPR_VARIABLE
10774 && (*code
)->expr2
->expr_type
!= EXPR_CONSTANT
)
10776 gfc_expr
*tmp_expr
;
10778 /* Assign the rhs to the temporary. */
10779 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
10780 this_code
= build_assignment (EXEC_ASSIGN
,
10781 tmp_expr
, (*code
)->expr2
,
10782 NULL
, NULL
, (*code
)->loc
);
10783 /* Add the code and substitute the rhs expression. */
10784 add_code_to_chain (&this_code
, &tmp_head
, &tmp_tail
);
10785 gfc_free_expr ((*code
)->expr2
);
10786 (*code
)->expr2
= tmp_expr
;
10789 /* Do the intrinsic assignment. This is not needed if the lhs is one
10790 of the temporaries generated here, since the intrinsic assignment
10791 to the final result already does this. */
10792 if ((*code
)->expr1
->symtree
->n
.sym
->name
[2] != '@')
10794 this_code
= build_assignment (EXEC_ASSIGN
,
10795 (*code
)->expr1
, (*code
)->expr2
,
10796 NULL
, NULL
, (*code
)->loc
);
10797 add_code_to_chain (&this_code
, &head
, &tail
);
10800 comp1
= (*code
)->expr1
->ts
.u
.derived
->components
;
10801 comp2
= (*code
)->expr2
->ts
.u
.derived
->components
;
10804 for (; comp1
; comp1
= comp1
->next
, comp2
= comp2
->next
)
10806 bool inout
= false;
10808 /* The intrinsic assignment does the right thing for pointers
10809 of all kinds and allocatable components. */
10810 if (!gfc_bt_struct (comp1
->ts
.type
)
10811 || comp1
->attr
.pointer
10812 || comp1
->attr
.allocatable
10813 || comp1
->attr
.proc_pointer_comp
10814 || comp1
->attr
.class_pointer
10815 || comp1
->attr
.proc_pointer
)
10818 /* Make an assigment for this component. */
10819 this_code
= build_assignment (EXEC_ASSIGN
,
10820 (*code
)->expr1
, (*code
)->expr2
,
10821 comp1
, comp2
, (*code
)->loc
);
10823 /* Convert the assignment if there is a defined assignment for
10824 this type. Otherwise, using the call from gfc_resolve_code,
10825 recurse into its components. */
10826 gfc_resolve_code (this_code
, ns
);
10828 if (this_code
->op
== EXEC_ASSIGN_CALL
)
10830 gfc_formal_arglist
*dummy_args
;
10832 /* Check that there is a typebound defined assignment. If not,
10833 then this must be a module defined assignment. We cannot
10834 use the defined_assign_comp attribute here because it must
10835 be this derived type that has the defined assignment and not
10837 if (!(comp1
->ts
.u
.derived
->f2k_derived
10838 && comp1
->ts
.u
.derived
->f2k_derived
10839 ->tb_op
[INTRINSIC_ASSIGN
]))
10841 gfc_free_statements (this_code
);
10846 /* If the first argument of the subroutine has intent INOUT
10847 a temporary must be generated and used instead. */
10848 rsym
= this_code
->resolved_sym
;
10849 dummy_args
= gfc_sym_get_dummy_args (rsym
);
10851 && dummy_args
->sym
->attr
.intent
== INTENT_INOUT
)
10853 gfc_code
*temp_code
;
10856 /* Build the temporary required for the assignment and put
10857 it at the head of the generated code. */
10860 t1
= get_temp_from_expr ((*code
)->expr1
, ns
);
10861 temp_code
= build_assignment (EXEC_ASSIGN
,
10862 t1
, (*code
)->expr1
,
10863 NULL
, NULL
, (*code
)->loc
);
10865 /* For allocatable LHS, check whether it is allocated. Note
10866 that allocatable components with defined assignment are
10867 not yet support. See PR 57696. */
10868 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
)
10872 gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
10873 block
= gfc_get_code (EXEC_IF
);
10874 block
->block
= gfc_get_code (EXEC_IF
);
10875 block
->block
->expr1
10876 = gfc_build_intrinsic_call (ns
,
10877 GFC_ISYM_ALLOCATED
, "allocated",
10878 (*code
)->loc
, 1, e
);
10879 block
->block
->next
= temp_code
;
10882 add_code_to_chain (&temp_code
, &tmp_head
, &tmp_tail
);
10885 /* Replace the first actual arg with the component of the
10887 gfc_free_expr (this_code
->ext
.actual
->expr
);
10888 this_code
->ext
.actual
->expr
= gfc_copy_expr (t1
);
10889 add_comp_ref (this_code
->ext
.actual
->expr
, comp1
);
10891 /* If the LHS variable is allocatable and wasn't allocated and
10892 the temporary is allocatable, pointer assign the address of
10893 the freshly allocated LHS to the temporary. */
10894 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
10895 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
10900 cond
= gfc_get_expr ();
10901 cond
->ts
.type
= BT_LOGICAL
;
10902 cond
->ts
.kind
= gfc_default_logical_kind
;
10903 cond
->expr_type
= EXPR_OP
;
10904 cond
->where
= (*code
)->loc
;
10905 cond
->value
.op
.op
= INTRINSIC_NOT
;
10906 cond
->value
.op
.op1
= gfc_build_intrinsic_call (ns
,
10907 GFC_ISYM_ALLOCATED
, "allocated",
10908 (*code
)->loc
, 1, gfc_copy_expr (t1
));
10909 block
= gfc_get_code (EXEC_IF
);
10910 block
->block
= gfc_get_code (EXEC_IF
);
10911 block
->block
->expr1
= cond
;
10912 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
10913 t1
, (*code
)->expr1
,
10914 NULL
, NULL
, (*code
)->loc
);
10915 add_code_to_chain (&block
, &head
, &tail
);
10919 else if (this_code
->op
== EXEC_ASSIGN
&& !this_code
->next
)
10921 /* Don't add intrinsic assignments since they are already
10922 effected by the intrinsic assignment of the structure. */
10923 gfc_free_statements (this_code
);
10928 add_code_to_chain (&this_code
, &head
, &tail
);
10932 /* Transfer the value to the final result. */
10933 this_code
= build_assignment (EXEC_ASSIGN
,
10934 (*code
)->expr1
, t1
,
10935 comp1
, comp2
, (*code
)->loc
);
10936 add_code_to_chain (&this_code
, &head
, &tail
);
10940 /* Put the temporary assignments at the top of the generated code. */
10941 if (tmp_head
&& component_assignment_level
== 1)
10943 gfc_append_code (tmp_head
, head
);
10945 tmp_head
= tmp_tail
= NULL
;
10948 // If we did a pointer assignment - thus, we need to ensure that the LHS is
10949 // not accidentally deallocated. Hence, nullify t1.
10950 if (t1
&& (*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
10951 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
10957 e
= gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
10958 cond
= gfc_build_intrinsic_call (ns
, GFC_ISYM_ASSOCIATED
, "associated",
10959 (*code
)->loc
, 2, gfc_copy_expr (t1
), e
);
10960 block
= gfc_get_code (EXEC_IF
);
10961 block
->block
= gfc_get_code (EXEC_IF
);
10962 block
->block
->expr1
= cond
;
10963 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
10964 t1
, gfc_get_null_expr (&(*code
)->loc
),
10965 NULL
, NULL
, (*code
)->loc
);
10966 gfc_append_code (tail
, block
);
10970 /* Now attach the remaining code chain to the input code. Step on
10971 to the end of the new code since resolution is complete. */
10972 gcc_assert ((*code
)->op
== EXEC_ASSIGN
);
10973 tail
->next
= (*code
)->next
;
10974 /* Overwrite 'code' because this would place the intrinsic assignment
10975 before the temporary for the lhs is created. */
10976 gfc_free_expr ((*code
)->expr1
);
10977 gfc_free_expr ((*code
)->expr2
);
10983 component_assignment_level
--;
10987 /* F2008: Pointer function assignments are of the form:
10988 ptr_fcn (args) = expr
10989 This function breaks these assignments into two statements:
10990 temporary_pointer => ptr_fcn(args)
10991 temporary_pointer = expr */
10994 resolve_ptr_fcn_assign (gfc_code
**code
, gfc_namespace
*ns
)
10996 gfc_expr
*tmp_ptr_expr
;
10997 gfc_code
*this_code
;
10998 gfc_component
*comp
;
11001 if ((*code
)->expr1
->expr_type
!= EXPR_FUNCTION
)
11004 /* Even if standard does not support this feature, continue to build
11005 the two statements to avoid upsetting frontend_passes.c. */
11006 gfc_notify_std (GFC_STD_F2008
, "Pointer procedure assignment at "
11007 "%L", &(*code
)->loc
);
11009 comp
= gfc_get_proc_ptr_comp ((*code
)->expr1
);
11012 s
= comp
->ts
.interface
;
11014 s
= (*code
)->expr1
->symtree
->n
.sym
;
11016 if (s
== NULL
|| !s
->result
->attr
.pointer
)
11018 gfc_error ("The function result on the lhs of the assignment at "
11019 "%L must have the pointer attribute.",
11020 &(*code
)->expr1
->where
);
11021 (*code
)->op
= EXEC_NOP
;
11025 tmp_ptr_expr
= get_temp_from_expr ((*code
)->expr2
, ns
);
11027 /* get_temp_from_expression is set up for ordinary assignments. To that
11028 end, where array bounds are not known, arrays are made allocatable.
11029 Change the temporary to a pointer here. */
11030 tmp_ptr_expr
->symtree
->n
.sym
->attr
.pointer
= 1;
11031 tmp_ptr_expr
->symtree
->n
.sym
->attr
.allocatable
= 0;
11032 tmp_ptr_expr
->where
= (*code
)->loc
;
11034 this_code
= build_assignment (EXEC_ASSIGN
,
11035 tmp_ptr_expr
, (*code
)->expr2
,
11036 NULL
, NULL
, (*code
)->loc
);
11037 this_code
->next
= (*code
)->next
;
11038 (*code
)->next
= this_code
;
11039 (*code
)->op
= EXEC_POINTER_ASSIGN
;
11040 (*code
)->expr2
= (*code
)->expr1
;
11041 (*code
)->expr1
= tmp_ptr_expr
;
11047 /* Deferred character length assignments from an operator expression
11048 require a temporary because the character length of the lhs can
11049 change in the course of the assignment. */
11052 deferred_op_assign (gfc_code
**code
, gfc_namespace
*ns
)
11054 gfc_expr
*tmp_expr
;
11055 gfc_code
*this_code
;
11057 if (!((*code
)->expr1
->ts
.type
== BT_CHARACTER
11058 && (*code
)->expr1
->ts
.deferred
&& (*code
)->expr1
->rank
11059 && (*code
)->expr2
->expr_type
== EXPR_OP
))
11062 if (!gfc_check_dependency ((*code
)->expr1
, (*code
)->expr2
, 1))
11065 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11066 tmp_expr
->where
= (*code
)->loc
;
11068 /* A new charlen is required to ensure that the variable string
11069 length is different to that of the original lhs. */
11070 tmp_expr
->ts
.u
.cl
= gfc_get_charlen();
11071 tmp_expr
->symtree
->n
.sym
->ts
.u
.cl
= tmp_expr
->ts
.u
.cl
;
11072 tmp_expr
->ts
.u
.cl
->next
= (*code
)->expr2
->ts
.u
.cl
->next
;
11073 (*code
)->expr2
->ts
.u
.cl
->next
= tmp_expr
->ts
.u
.cl
;
11075 tmp_expr
->symtree
->n
.sym
->ts
.deferred
= 1;
11077 this_code
= build_assignment (EXEC_ASSIGN
,
11079 gfc_copy_expr (tmp_expr
),
11080 NULL
, NULL
, (*code
)->loc
);
11082 (*code
)->expr1
= tmp_expr
;
11084 this_code
->next
= (*code
)->next
;
11085 (*code
)->next
= this_code
;
11091 /* Given a block of code, recursively resolve everything pointed to by this
11095 gfc_resolve_code (gfc_code
*code
, gfc_namespace
*ns
)
11097 int omp_workshare_save
;
11098 int forall_save
, do_concurrent_save
;
11102 frame
.prev
= cs_base
;
11106 find_reachable_labels (code
);
11108 for (; code
; code
= code
->next
)
11110 frame
.current
= code
;
11111 forall_save
= forall_flag
;
11112 do_concurrent_save
= gfc_do_concurrent_flag
;
11114 if (code
->op
== EXEC_FORALL
)
11117 gfc_resolve_forall (code
, ns
, forall_save
);
11120 else if (code
->block
)
11122 omp_workshare_save
= -1;
11125 case EXEC_OACC_PARALLEL_LOOP
:
11126 case EXEC_OACC_PARALLEL
:
11127 case EXEC_OACC_KERNELS_LOOP
:
11128 case EXEC_OACC_KERNELS
:
11129 case EXEC_OACC_DATA
:
11130 case EXEC_OACC_HOST_DATA
:
11131 case EXEC_OACC_LOOP
:
11132 gfc_resolve_oacc_blocks (code
, ns
);
11134 case EXEC_OMP_PARALLEL_WORKSHARE
:
11135 omp_workshare_save
= omp_workshare_flag
;
11136 omp_workshare_flag
= 1;
11137 gfc_resolve_omp_parallel_blocks (code
, ns
);
11139 case EXEC_OMP_PARALLEL
:
11140 case EXEC_OMP_PARALLEL_DO
:
11141 case EXEC_OMP_PARALLEL_DO_SIMD
:
11142 case EXEC_OMP_PARALLEL_SECTIONS
:
11143 case EXEC_OMP_TARGET_PARALLEL
:
11144 case EXEC_OMP_TARGET_PARALLEL_DO
:
11145 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11146 case EXEC_OMP_TARGET_TEAMS
:
11147 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11148 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11149 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11150 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11151 case EXEC_OMP_TASK
:
11152 case EXEC_OMP_TASKLOOP
:
11153 case EXEC_OMP_TASKLOOP_SIMD
:
11154 case EXEC_OMP_TEAMS
:
11155 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11156 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11157 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11158 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11159 omp_workshare_save
= omp_workshare_flag
;
11160 omp_workshare_flag
= 0;
11161 gfc_resolve_omp_parallel_blocks (code
, ns
);
11163 case EXEC_OMP_DISTRIBUTE
:
11164 case EXEC_OMP_DISTRIBUTE_SIMD
:
11166 case EXEC_OMP_DO_SIMD
:
11167 case EXEC_OMP_SIMD
:
11168 case EXEC_OMP_TARGET_SIMD
:
11169 gfc_resolve_omp_do_blocks (code
, ns
);
11171 case EXEC_SELECT_TYPE
:
11172 /* Blocks are handled in resolve_select_type because we have
11173 to transform the SELECT TYPE into ASSOCIATE first. */
11175 case EXEC_DO_CONCURRENT
:
11176 gfc_do_concurrent_flag
= 1;
11177 gfc_resolve_blocks (code
->block
, ns
);
11178 gfc_do_concurrent_flag
= 2;
11180 case EXEC_OMP_WORKSHARE
:
11181 omp_workshare_save
= omp_workshare_flag
;
11182 omp_workshare_flag
= 1;
11185 gfc_resolve_blocks (code
->block
, ns
);
11189 if (omp_workshare_save
!= -1)
11190 omp_workshare_flag
= omp_workshare_save
;
11194 if (code
->op
!= EXEC_COMPCALL
&& code
->op
!= EXEC_CALL_PPC
)
11195 t
= gfc_resolve_expr (code
->expr1
);
11196 forall_flag
= forall_save
;
11197 gfc_do_concurrent_flag
= do_concurrent_save
;
11199 if (!gfc_resolve_expr (code
->expr2
))
11202 if (code
->op
== EXEC_ALLOCATE
11203 && !gfc_resolve_expr (code
->expr3
))
11209 case EXEC_END_BLOCK
:
11210 case EXEC_END_NESTED_BLOCK
:
11214 case EXEC_ERROR_STOP
:
11216 case EXEC_CONTINUE
:
11218 case EXEC_ASSIGN_CALL
:
11221 case EXEC_CRITICAL
:
11222 resolve_critical (code
);
11225 case EXEC_SYNC_ALL
:
11226 case EXEC_SYNC_IMAGES
:
11227 case EXEC_SYNC_MEMORY
:
11228 resolve_sync (code
);
11233 case EXEC_EVENT_POST
:
11234 case EXEC_EVENT_WAIT
:
11235 resolve_lock_unlock_event (code
);
11238 case EXEC_FAIL_IMAGE
:
11239 case EXEC_FORM_TEAM
:
11240 case EXEC_CHANGE_TEAM
:
11241 case EXEC_END_TEAM
:
11242 case EXEC_SYNC_TEAM
:
11246 /* Keep track of which entry we are up to. */
11247 current_entry_id
= code
->ext
.entry
->id
;
11251 resolve_where (code
, NULL
);
11255 if (code
->expr1
!= NULL
)
11257 if (code
->expr1
->ts
.type
!= BT_INTEGER
)
11258 gfc_error ("ASSIGNED GOTO statement at %L requires an "
11259 "INTEGER variable", &code
->expr1
->where
);
11260 else if (code
->expr1
->symtree
->n
.sym
->attr
.assign
!= 1)
11261 gfc_error ("Variable %qs has not been assigned a target "
11262 "label at %L", code
->expr1
->symtree
->n
.sym
->name
,
11263 &code
->expr1
->where
);
11266 resolve_branch (code
->label1
, code
);
11270 if (code
->expr1
!= NULL
11271 && (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
))
11272 gfc_error ("Alternate RETURN statement at %L requires a SCALAR-"
11273 "INTEGER return specifier", &code
->expr1
->where
);
11276 case EXEC_INIT_ASSIGN
:
11277 case EXEC_END_PROCEDURE
:
11284 /* Remove a GFC_ISYM_CAF_GET inserted for a coindexed variable on
11286 if (code
->expr1
->expr_type
== EXPR_FUNCTION
11287 && code
->expr1
->value
.function
.isym
11288 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
11289 remove_caf_get_intrinsic (code
->expr1
);
11291 /* If this is a pointer function in an lvalue variable context,
11292 the new code will have to be resolved afresh. This is also the
11293 case with an error, where the code is transformed into NOP to
11294 prevent ICEs downstream. */
11295 if (resolve_ptr_fcn_assign (&code
, ns
)
11296 || code
->op
== EXEC_NOP
)
11299 if (!gfc_check_vardef_context (code
->expr1
, false, false, false,
11303 if (resolve_ordinary_assign (code
, ns
))
11305 if (code
->op
== EXEC_COMPCALL
)
11311 /* Check for dependencies in deferred character length array
11312 assignments and generate a temporary, if necessary. */
11313 if (code
->op
== EXEC_ASSIGN
&& deferred_op_assign (&code
, ns
))
11316 /* F03 7.4.1.3 for non-allocatable, non-pointer components. */
11317 if (code
->op
!= EXEC_CALL
&& code
->expr1
->ts
.type
== BT_DERIVED
11318 && code
->expr1
->ts
.u
.derived
11319 && code
->expr1
->ts
.u
.derived
->attr
.defined_assign_comp
)
11320 generate_component_assignments (&code
, ns
);
11324 case EXEC_LABEL_ASSIGN
:
11325 if (code
->label1
->defined
== ST_LABEL_UNKNOWN
)
11326 gfc_error ("Label %d referenced at %L is never defined",
11327 code
->label1
->value
, &code
->label1
->where
);
11329 && (code
->expr1
->expr_type
!= EXPR_VARIABLE
11330 || code
->expr1
->symtree
->n
.sym
->ts
.type
!= BT_INTEGER
11331 || code
->expr1
->symtree
->n
.sym
->ts
.kind
11332 != gfc_default_integer_kind
11333 || code
->expr1
->symtree
->n
.sym
->as
!= NULL
))
11334 gfc_error ("ASSIGN statement at %L requires a scalar "
11335 "default INTEGER variable", &code
->expr1
->where
);
11338 case EXEC_POINTER_ASSIGN
:
11345 /* This is both a variable definition and pointer assignment
11346 context, so check both of them. For rank remapping, a final
11347 array ref may be present on the LHS and fool gfc_expr_attr
11348 used in gfc_check_vardef_context. Remove it. */
11349 e
= remove_last_array_ref (code
->expr1
);
11350 t
= gfc_check_vardef_context (e
, true, false, false,
11351 _("pointer assignment"));
11353 t
= gfc_check_vardef_context (e
, false, false, false,
11354 _("pointer assignment"));
11359 gfc_check_pointer_assign (code
->expr1
, code
->expr2
);
11361 /* Assigning a class object always is a regular assign. */
11362 if (code
->expr2
->ts
.type
== BT_CLASS
11363 && code
->expr1
->ts
.type
== BT_CLASS
11364 && !CLASS_DATA (code
->expr2
)->attr
.dimension
11365 && !(gfc_expr_attr (code
->expr1
).proc_pointer
11366 && code
->expr2
->expr_type
== EXPR_VARIABLE
11367 && code
->expr2
->symtree
->n
.sym
->attr
.flavor
11369 code
->op
= EXEC_ASSIGN
;
11373 case EXEC_ARITHMETIC_IF
:
11375 gfc_expr
*e
= code
->expr1
;
11377 gfc_resolve_expr (e
);
11378 if (e
->expr_type
== EXPR_NULL
)
11379 gfc_error ("Invalid NULL at %L", &e
->where
);
11381 if (t
&& (e
->rank
> 0
11382 || !(e
->ts
.type
== BT_REAL
|| e
->ts
.type
== BT_INTEGER
)))
11383 gfc_error ("Arithmetic IF statement at %L requires a scalar "
11384 "REAL or INTEGER expression", &e
->where
);
11386 resolve_branch (code
->label1
, code
);
11387 resolve_branch (code
->label2
, code
);
11388 resolve_branch (code
->label3
, code
);
11393 if (t
&& code
->expr1
!= NULL
11394 && (code
->expr1
->ts
.type
!= BT_LOGICAL
11395 || code
->expr1
->rank
!= 0))
11396 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
11397 &code
->expr1
->where
);
11402 resolve_call (code
);
11405 case EXEC_COMPCALL
:
11407 resolve_typebound_subroutine (code
);
11410 case EXEC_CALL_PPC
:
11411 resolve_ppc_call (code
);
11415 /* Select is complicated. Also, a SELECT construct could be
11416 a transformed computed GOTO. */
11417 resolve_select (code
, false);
11420 case EXEC_SELECT_TYPE
:
11421 resolve_select_type (code
, ns
);
11425 resolve_block_construct (code
);
11429 if (code
->ext
.iterator
!= NULL
)
11431 gfc_iterator
*iter
= code
->ext
.iterator
;
11432 if (gfc_resolve_iterator (iter
, true, false))
11433 gfc_resolve_do_iterator (code
, iter
->var
->symtree
->n
.sym
,
11438 case EXEC_DO_WHILE
:
11439 if (code
->expr1
== NULL
)
11440 gfc_internal_error ("gfc_resolve_code(): No expression on "
11443 && (code
->expr1
->rank
!= 0
11444 || code
->expr1
->ts
.type
!= BT_LOGICAL
))
11445 gfc_error ("Exit condition of DO WHILE loop at %L must be "
11446 "a scalar LOGICAL expression", &code
->expr1
->where
);
11449 case EXEC_ALLOCATE
:
11451 resolve_allocate_deallocate (code
, "ALLOCATE");
11455 case EXEC_DEALLOCATE
:
11457 resolve_allocate_deallocate (code
, "DEALLOCATE");
11462 if (!gfc_resolve_open (code
->ext
.open
))
11465 resolve_branch (code
->ext
.open
->err
, code
);
11469 if (!gfc_resolve_close (code
->ext
.close
))
11472 resolve_branch (code
->ext
.close
->err
, code
);
11475 case EXEC_BACKSPACE
:
11479 if (!gfc_resolve_filepos (code
->ext
.filepos
))
11482 resolve_branch (code
->ext
.filepos
->err
, code
);
11486 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11489 resolve_branch (code
->ext
.inquire
->err
, code
);
11492 case EXEC_IOLENGTH
:
11493 gcc_assert (code
->ext
.inquire
!= NULL
);
11494 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11497 resolve_branch (code
->ext
.inquire
->err
, code
);
11501 if (!gfc_resolve_wait (code
->ext
.wait
))
11504 resolve_branch (code
->ext
.wait
->err
, code
);
11505 resolve_branch (code
->ext
.wait
->end
, code
);
11506 resolve_branch (code
->ext
.wait
->eor
, code
);
11511 if (!gfc_resolve_dt (code
->ext
.dt
, &code
->loc
))
11514 resolve_branch (code
->ext
.dt
->err
, code
);
11515 resolve_branch (code
->ext
.dt
->end
, code
);
11516 resolve_branch (code
->ext
.dt
->eor
, code
);
11519 case EXEC_TRANSFER
:
11520 resolve_transfer (code
);
11523 case EXEC_DO_CONCURRENT
:
11525 resolve_forall_iterators (code
->ext
.forall_iterator
);
11527 if (code
->expr1
!= NULL
11528 && (code
->expr1
->ts
.type
!= BT_LOGICAL
|| code
->expr1
->rank
))
11529 gfc_error ("FORALL mask clause at %L requires a scalar LOGICAL "
11530 "expression", &code
->expr1
->where
);
11533 case EXEC_OACC_PARALLEL_LOOP
:
11534 case EXEC_OACC_PARALLEL
:
11535 case EXEC_OACC_KERNELS_LOOP
:
11536 case EXEC_OACC_KERNELS
:
11537 case EXEC_OACC_DATA
:
11538 case EXEC_OACC_HOST_DATA
:
11539 case EXEC_OACC_LOOP
:
11540 case EXEC_OACC_UPDATE
:
11541 case EXEC_OACC_WAIT
:
11542 case EXEC_OACC_CACHE
:
11543 case EXEC_OACC_ENTER_DATA
:
11544 case EXEC_OACC_EXIT_DATA
:
11545 case EXEC_OACC_ATOMIC
:
11546 case EXEC_OACC_DECLARE
:
11547 gfc_resolve_oacc_directive (code
, ns
);
11550 case EXEC_OMP_ATOMIC
:
11551 case EXEC_OMP_BARRIER
:
11552 case EXEC_OMP_CANCEL
:
11553 case EXEC_OMP_CANCELLATION_POINT
:
11554 case EXEC_OMP_CRITICAL
:
11555 case EXEC_OMP_FLUSH
:
11556 case EXEC_OMP_DISTRIBUTE
:
11557 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
11558 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
11559 case EXEC_OMP_DISTRIBUTE_SIMD
:
11561 case EXEC_OMP_DO_SIMD
:
11562 case EXEC_OMP_MASTER
:
11563 case EXEC_OMP_ORDERED
:
11564 case EXEC_OMP_SECTIONS
:
11565 case EXEC_OMP_SIMD
:
11566 case EXEC_OMP_SINGLE
:
11567 case EXEC_OMP_TARGET
:
11568 case EXEC_OMP_TARGET_DATA
:
11569 case EXEC_OMP_TARGET_ENTER_DATA
:
11570 case EXEC_OMP_TARGET_EXIT_DATA
:
11571 case EXEC_OMP_TARGET_PARALLEL
:
11572 case EXEC_OMP_TARGET_PARALLEL_DO
:
11573 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11574 case EXEC_OMP_TARGET_SIMD
:
11575 case EXEC_OMP_TARGET_TEAMS
:
11576 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11577 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11578 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11579 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11580 case EXEC_OMP_TARGET_UPDATE
:
11581 case EXEC_OMP_TASK
:
11582 case EXEC_OMP_TASKGROUP
:
11583 case EXEC_OMP_TASKLOOP
:
11584 case EXEC_OMP_TASKLOOP_SIMD
:
11585 case EXEC_OMP_TASKWAIT
:
11586 case EXEC_OMP_TASKYIELD
:
11587 case EXEC_OMP_TEAMS
:
11588 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11589 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11590 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11591 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11592 case EXEC_OMP_WORKSHARE
:
11593 gfc_resolve_omp_directive (code
, ns
);
11596 case EXEC_OMP_PARALLEL
:
11597 case EXEC_OMP_PARALLEL_DO
:
11598 case EXEC_OMP_PARALLEL_DO_SIMD
:
11599 case EXEC_OMP_PARALLEL_SECTIONS
:
11600 case EXEC_OMP_PARALLEL_WORKSHARE
:
11601 omp_workshare_save
= omp_workshare_flag
;
11602 omp_workshare_flag
= 0;
11603 gfc_resolve_omp_directive (code
, ns
);
11604 omp_workshare_flag
= omp_workshare_save
;
11608 gfc_internal_error ("gfc_resolve_code(): Bad statement code");
11612 cs_base
= frame
.prev
;
11616 /* Resolve initial values and make sure they are compatible with
11620 resolve_values (gfc_symbol
*sym
)
11624 if (sym
->value
== NULL
)
11627 if (sym
->value
->expr_type
== EXPR_STRUCTURE
)
11628 t
= resolve_structure_cons (sym
->value
, 1);
11630 t
= gfc_resolve_expr (sym
->value
);
11635 gfc_check_assign_symbol (sym
, NULL
, sym
->value
);
11639 /* Verify any BIND(C) derived types in the namespace so we can report errors
11640 for them once, rather than for each variable declared of that type. */
11643 resolve_bind_c_derived_types (gfc_symbol
*derived_sym
)
11645 if (derived_sym
!= NULL
&& derived_sym
->attr
.flavor
== FL_DERIVED
11646 && derived_sym
->attr
.is_bind_c
== 1)
11647 verify_bind_c_derived_type (derived_sym
);
11653 /* Check the interfaces of DTIO procedures associated with derived
11654 type 'sym'. These procedures can either have typebound bindings or
11655 can appear in DTIO generic interfaces. */
11658 gfc_verify_DTIO_procedures (gfc_symbol
*sym
)
11660 if (!sym
|| sym
->attr
.flavor
!= FL_DERIVED
)
11663 gfc_check_dtio_interfaces (sym
);
11668 /* Verify that any binding labels used in a given namespace do not collide
11669 with the names or binding labels of any global symbols. Multiple INTERFACE
11670 for the same procedure are permitted. */
11673 gfc_verify_binding_labels (gfc_symbol
*sym
)
11676 const char *module
;
11678 if (!sym
|| !sym
->attr
.is_bind_c
|| sym
->attr
.is_iso_c
11679 || sym
->attr
.flavor
== FL_DERIVED
|| !sym
->binding_label
)
11682 gsym
= gfc_find_case_gsymbol (gfc_gsym_root
, sym
->binding_label
);
11685 module
= sym
->module
;
11686 else if (sym
->ns
&& sym
->ns
->proc_name
11687 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
11688 module
= sym
->ns
->proc_name
->name
;
11689 else if (sym
->ns
&& sym
->ns
->parent
11690 && sym
->ns
&& sym
->ns
->parent
->proc_name
11691 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
11692 module
= sym
->ns
->parent
->proc_name
->name
;
11698 && (gsym
->type
== GSYM_FUNCTION
|| gsym
->type
== GSYM_SUBROUTINE
)))
11701 gsym
= gfc_get_gsymbol (sym
->binding_label
);
11702 gsym
->where
= sym
->declared_at
;
11703 gsym
->sym_name
= sym
->name
;
11704 gsym
->binding_label
= sym
->binding_label
;
11705 gsym
->ns
= sym
->ns
;
11706 gsym
->mod_name
= module
;
11707 if (sym
->attr
.function
)
11708 gsym
->type
= GSYM_FUNCTION
;
11709 else if (sym
->attr
.subroutine
)
11710 gsym
->type
= GSYM_SUBROUTINE
;
11711 /* Mark as variable/procedure as defined, unless its an INTERFACE. */
11712 gsym
->defined
= sym
->attr
.if_source
!= IFSRC_IFBODY
;
11716 if (sym
->attr
.flavor
== FL_VARIABLE
&& gsym
->type
!= GSYM_UNKNOWN
)
11718 gfc_error ("Variable %qs with binding label %qs at %L uses the same global "
11719 "identifier as entity at %L", sym
->name
,
11720 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11721 /* Clear the binding label to prevent checking multiple times. */
11722 sym
->binding_label
= NULL
;
11725 else if (sym
->attr
.flavor
== FL_VARIABLE
&& module
11726 && (strcmp (module
, gsym
->mod_name
) != 0
11727 || strcmp (sym
->name
, gsym
->sym_name
) != 0))
11729 /* This can only happen if the variable is defined in a module - if it
11730 isn't the same module, reject it. */
11731 gfc_error ("Variable %qs from module %qs with binding label %qs at %L "
11732 "uses the same global identifier as entity at %L from module %qs",
11733 sym
->name
, module
, sym
->binding_label
,
11734 &sym
->declared_at
, &gsym
->where
, gsym
->mod_name
);
11735 sym
->binding_label
= NULL
;
11737 else if ((sym
->attr
.function
|| sym
->attr
.subroutine
)
11738 && ((gsym
->type
!= GSYM_SUBROUTINE
&& gsym
->type
!= GSYM_FUNCTION
)
11739 || (gsym
->defined
&& sym
->attr
.if_source
!= IFSRC_IFBODY
))
11740 && sym
!= gsym
->ns
->proc_name
11741 && (module
!= gsym
->mod_name
11742 || strcmp (gsym
->sym_name
, sym
->name
) != 0
11743 || (module
&& strcmp (module
, gsym
->mod_name
) != 0)))
11745 /* Print an error if the procedure is defined multiple times; we have to
11746 exclude references to the same procedure via module association or
11747 multiple checks for the same procedure. */
11748 gfc_error ("Procedure %qs with binding label %qs at %L uses the same "
11749 "global identifier as entity at %L", sym
->name
,
11750 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11751 sym
->binding_label
= NULL
;
11756 /* Resolve an index expression. */
11759 resolve_index_expr (gfc_expr
*e
)
11761 if (!gfc_resolve_expr (e
))
11764 if (!gfc_simplify_expr (e
, 0))
11767 if (!gfc_specification_expr (e
))
11774 /* Resolve a charlen structure. */
11777 resolve_charlen (gfc_charlen
*cl
)
11780 bool saved_specification_expr
;
11786 saved_specification_expr
= specification_expr
;
11787 specification_expr
= true;
11789 if (cl
->length_from_typespec
)
11791 if (!gfc_resolve_expr (cl
->length
))
11793 specification_expr
= saved_specification_expr
;
11797 if (!gfc_simplify_expr (cl
->length
, 0))
11799 specification_expr
= saved_specification_expr
;
11803 /* cl->length has been resolved. It should have an integer type. */
11804 if (cl
->length
->ts
.type
!= BT_INTEGER
)
11806 gfc_error ("Scalar INTEGER expression expected at %L",
11807 &cl
->length
->where
);
11813 if (!resolve_index_expr (cl
->length
))
11815 specification_expr
= saved_specification_expr
;
11820 /* F2008, 4.4.3.2: If the character length parameter value evaluates to
11821 a negative value, the length of character entities declared is zero. */
11822 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11823 && mpz_sgn (cl
->length
->value
.integer
) < 0)
11824 gfc_replace_expr (cl
->length
,
11825 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 0));
11827 /* Check that the character length is not too large. */
11828 k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
11829 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11830 && cl
->length
->ts
.type
== BT_INTEGER
11831 && mpz_cmp (cl
->length
->value
.integer
, gfc_integer_kinds
[k
].huge
) > 0)
11833 gfc_error ("String length at %L is too large", &cl
->length
->where
);
11834 specification_expr
= saved_specification_expr
;
11838 specification_expr
= saved_specification_expr
;
11843 /* Test for non-constant shape arrays. */
11846 is_non_constant_shape_array (gfc_symbol
*sym
)
11852 not_constant
= false;
11853 if (sym
->as
!= NULL
)
11855 /* Unfortunately, !gfc_is_compile_time_shape hits a legal case that
11856 has not been simplified; parameter array references. Do the
11857 simplification now. */
11858 for (i
= 0; i
< sym
->as
->rank
+ sym
->as
->corank
; i
++)
11860 e
= sym
->as
->lower
[i
];
11861 if (e
&& (!resolve_index_expr(e
)
11862 || !gfc_is_constant_expr (e
)))
11863 not_constant
= true;
11864 e
= sym
->as
->upper
[i
];
11865 if (e
&& (!resolve_index_expr(e
)
11866 || !gfc_is_constant_expr (e
)))
11867 not_constant
= true;
11870 return not_constant
;
11873 /* Given a symbol and an initialization expression, add code to initialize
11874 the symbol to the function entry. */
11876 build_init_assign (gfc_symbol
*sym
, gfc_expr
*init
)
11880 gfc_namespace
*ns
= sym
->ns
;
11882 /* Search for the function namespace if this is a contained
11883 function without an explicit result. */
11884 if (sym
->attr
.function
&& sym
== sym
->result
11885 && sym
->name
!= sym
->ns
->proc_name
->name
)
11887 ns
= ns
->contained
;
11888 for (;ns
; ns
= ns
->sibling
)
11889 if (strcmp (ns
->proc_name
->name
, sym
->name
) == 0)
11895 gfc_free_expr (init
);
11899 /* Build an l-value expression for the result. */
11900 lval
= gfc_lval_expr_from_sym (sym
);
11902 /* Add the code at scope entry. */
11903 init_st
= gfc_get_code (EXEC_INIT_ASSIGN
);
11904 init_st
->next
= ns
->code
;
11905 ns
->code
= init_st
;
11907 /* Assign the default initializer to the l-value. */
11908 init_st
->loc
= sym
->declared_at
;
11909 init_st
->expr1
= lval
;
11910 init_st
->expr2
= init
;
11914 /* Whether or not we can generate a default initializer for a symbol. */
11917 can_generate_init (gfc_symbol
*sym
)
11919 symbol_attribute
*a
;
11924 /* These symbols should never have a default initialization. */
11929 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
11930 && (CLASS_DATA (sym
)->attr
.class_pointer
11931 || CLASS_DATA (sym
)->attr
.proc_pointer
))
11932 || a
->in_equivalence
11939 || (!a
->referenced
&& !a
->result
)
11940 || (a
->dummy
&& a
->intent
!= INTENT_OUT
)
11941 || (a
->function
&& sym
!= sym
->result
)
11946 /* Assign the default initializer to a derived type variable or result. */
11949 apply_default_init (gfc_symbol
*sym
)
11951 gfc_expr
*init
= NULL
;
11953 if (sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
11956 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
)
11957 init
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
11959 if (init
== NULL
&& sym
->ts
.type
!= BT_CLASS
)
11962 build_init_assign (sym
, init
);
11963 sym
->attr
.referenced
= 1;
11967 /* Build an initializer for a local. Returns null if the symbol should not have
11968 a default initialization. */
11971 build_default_init_expr (gfc_symbol
*sym
)
11973 /* These symbols should never have a default initialization. */
11974 if (sym
->attr
.allocatable
11975 || sym
->attr
.external
11977 || sym
->attr
.pointer
11978 || sym
->attr
.in_equivalence
11979 || sym
->attr
.in_common
11982 || sym
->attr
.cray_pointee
11983 || sym
->attr
.cray_pointer
11987 /* Get the appropriate init expression. */
11988 return gfc_build_default_init_expr (&sym
->ts
, &sym
->declared_at
);
11991 /* Add an initialization expression to a local variable. */
11993 apply_default_init_local (gfc_symbol
*sym
)
11995 gfc_expr
*init
= NULL
;
11997 /* The symbol should be a variable or a function return value. */
11998 if ((sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
11999 || (sym
->attr
.function
&& sym
->result
!= sym
))
12002 /* Try to build the initializer expression. If we can't initialize
12003 this symbol, then init will be NULL. */
12004 init
= build_default_init_expr (sym
);
12008 /* For saved variables, we don't want to add an initializer at function
12009 entry, so we just add a static initializer. Note that automatic variables
12010 are stack allocated even with -fno-automatic; we have also to exclude
12011 result variable, which are also nonstatic. */
12012 if (!sym
->attr
.automatic
12013 && (sym
->attr
.save
|| sym
->ns
->save_all
12014 || (flag_max_stack_var_size
== 0 && !sym
->attr
.result
12015 && (sym
->ns
->proc_name
&& !sym
->ns
->proc_name
->attr
.recursive
)
12016 && (!sym
->attr
.dimension
|| !is_non_constant_shape_array (sym
)))))
12018 /* Don't clobber an existing initializer! */
12019 gcc_assert (sym
->value
== NULL
);
12024 build_init_assign (sym
, init
);
12028 /* Resolution of common features of flavors variable and procedure. */
12031 resolve_fl_var_and_proc (gfc_symbol
*sym
, int mp_flag
)
12033 gfc_array_spec
*as
;
12035 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12036 as
= CLASS_DATA (sym
)->as
;
12040 /* Constraints on deferred shape variable. */
12041 if (as
== NULL
|| as
->type
!= AS_DEFERRED
)
12043 bool pointer
, allocatable
, dimension
;
12045 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12047 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
12048 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
12049 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
12053 pointer
= sym
->attr
.pointer
&& !sym
->attr
.select_type_temporary
;
12054 allocatable
= sym
->attr
.allocatable
;
12055 dimension
= sym
->attr
.dimension
;
12060 if (dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12062 gfc_error ("Allocatable array %qs at %L must have a deferred "
12063 "shape or assumed rank", sym
->name
, &sym
->declared_at
);
12066 else if (!gfc_notify_std (GFC_STD_F2003
, "Scalar object "
12067 "%qs at %L may not be ALLOCATABLE",
12068 sym
->name
, &sym
->declared_at
))
12072 if (pointer
&& dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12074 gfc_error ("Array pointer %qs at %L must have a deferred shape or "
12075 "assumed rank", sym
->name
, &sym
->declared_at
);
12081 if (!mp_flag
&& !sym
->attr
.allocatable
&& !sym
->attr
.pointer
12082 && sym
->ts
.type
!= BT_CLASS
&& !sym
->assoc
)
12084 gfc_error ("Array %qs at %L cannot have a deferred shape",
12085 sym
->name
, &sym
->declared_at
);
12090 /* Constraints on polymorphic variables. */
12091 if (sym
->ts
.type
== BT_CLASS
&& !(sym
->result
&& sym
->result
!= sym
))
12094 if (sym
->attr
.class_ok
12095 && !sym
->attr
.select_type_temporary
12096 && !UNLIMITED_POLY (sym
)
12097 && !gfc_type_is_extensible (CLASS_DATA (sym
)->ts
.u
.derived
))
12099 gfc_error ("Type %qs of CLASS variable %qs at %L is not extensible",
12100 CLASS_DATA (sym
)->ts
.u
.derived
->name
, sym
->name
,
12101 &sym
->declared_at
);
12106 /* Assume that use associated symbols were checked in the module ns.
12107 Class-variables that are associate-names are also something special
12108 and excepted from the test. */
12109 if (!sym
->attr
.class_ok
&& !sym
->attr
.use_assoc
&& !sym
->assoc
)
12111 gfc_error ("CLASS variable %qs at %L must be dummy, allocatable "
12112 "or pointer", sym
->name
, &sym
->declared_at
);
12121 /* Additional checks for symbols with flavor variable and derived
12122 type. To be called from resolve_fl_variable. */
12125 resolve_fl_variable_derived (gfc_symbol
*sym
, int no_init_flag
)
12127 gcc_assert (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
);
12129 /* Check to see if a derived type is blocked from being host
12130 associated by the presence of another class I symbol in the same
12131 namespace. 14.6.1.3 of the standard and the discussion on
12132 comp.lang.fortran. */
12133 if (sym
->ns
!= sym
->ts
.u
.derived
->ns
12134 && !sym
->ts
.u
.derived
->attr
.use_assoc
12135 && sym
->ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
12138 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 0, &s
);
12139 if (s
&& s
->attr
.generic
)
12140 s
= gfc_find_dt_in_generic (s
);
12141 if (s
&& !gfc_fl_struct (s
->attr
.flavor
))
12143 gfc_error ("The type %qs cannot be host associated at %L "
12144 "because it is blocked by an incompatible object "
12145 "of the same name declared at %L",
12146 sym
->ts
.u
.derived
->name
, &sym
->declared_at
,
12152 /* 4th constraint in section 11.3: "If an object of a type for which
12153 component-initialization is specified (R429) appears in the
12154 specification-part of a module and does not have the ALLOCATABLE
12155 or POINTER attribute, the object shall have the SAVE attribute."
12157 The check for initializers is performed with
12158 gfc_has_default_initializer because gfc_default_initializer generates
12159 a hidden default for allocatable components. */
12160 if (!(sym
->value
|| no_init_flag
) && sym
->ns
->proc_name
12161 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12162 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
) && !sym
->attr
.save
12163 && !sym
->attr
.pointer
&& !sym
->attr
.allocatable
12164 && gfc_has_default_initializer (sym
->ts
.u
.derived
)
12165 && !gfc_notify_std (GFC_STD_F2008
, "Implied SAVE for module variable "
12166 "%qs at %L, needed due to the default "
12167 "initialization", sym
->name
, &sym
->declared_at
))
12170 /* Assign default initializer. */
12171 if (!(sym
->value
|| sym
->attr
.pointer
|| sym
->attr
.allocatable
)
12172 && (!no_init_flag
|| sym
->attr
.intent
== INTENT_OUT
))
12173 sym
->value
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12179 /* F2008, C402 (R401): A colon shall not be used as a type-param-value
12180 except in the declaration of an entity or component that has the POINTER
12181 or ALLOCATABLE attribute. */
12184 deferred_requirements (gfc_symbol
*sym
)
12186 if (sym
->ts
.deferred
12187 && !(sym
->attr
.pointer
12188 || sym
->attr
.allocatable
12189 || sym
->attr
.associate_var
12190 || sym
->attr
.omp_udr_artificial_var
))
12192 gfc_error ("Entity %qs at %L has a deferred type parameter and "
12193 "requires either the POINTER or ALLOCATABLE attribute",
12194 sym
->name
, &sym
->declared_at
);
12201 /* Resolve symbols with flavor variable. */
12204 resolve_fl_variable (gfc_symbol
*sym
, int mp_flag
)
12206 int no_init_flag
, automatic_flag
;
12208 const char *auto_save_msg
;
12209 bool saved_specification_expr
;
12211 auto_save_msg
= "Automatic object %qs at %L cannot have the "
12214 if (!resolve_fl_var_and_proc (sym
, mp_flag
))
12217 /* Set this flag to check that variables are parameters of all entries.
12218 This check is effected by the call to gfc_resolve_expr through
12219 is_non_constant_shape_array. */
12220 saved_specification_expr
= specification_expr
;
12221 specification_expr
= true;
12223 if (sym
->ns
->proc_name
12224 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12225 || sym
->ns
->proc_name
->attr
.is_main_program
)
12226 && !sym
->attr
.use_assoc
12227 && !sym
->attr
.allocatable
12228 && !sym
->attr
.pointer
12229 && is_non_constant_shape_array (sym
))
12231 /* F08:C541. The shape of an array defined in a main program or module
12232 * needs to be constant. */
12233 gfc_error ("The module or main program array %qs at %L must "
12234 "have constant shape", sym
->name
, &sym
->declared_at
);
12235 specification_expr
= saved_specification_expr
;
12239 /* Constraints on deferred type parameter. */
12240 if (!deferred_requirements (sym
))
12243 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.associate_var
)
12245 /* Make sure that character string variables with assumed length are
12246 dummy arguments. */
12247 e
= sym
->ts
.u
.cl
->length
;
12248 if (e
== NULL
&& !sym
->attr
.dummy
&& !sym
->attr
.result
12249 && !sym
->ts
.deferred
&& !sym
->attr
.select_type_temporary
12250 && !sym
->attr
.omp_udr_artificial_var
)
12252 gfc_error ("Entity with assumed character length at %L must be a "
12253 "dummy argument or a PARAMETER", &sym
->declared_at
);
12254 specification_expr
= saved_specification_expr
;
12258 if (e
&& sym
->attr
.save
== SAVE_EXPLICIT
&& !gfc_is_constant_expr (e
))
12260 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12261 specification_expr
= saved_specification_expr
;
12265 if (!gfc_is_constant_expr (e
)
12266 && !(e
->expr_type
== EXPR_VARIABLE
12267 && e
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
))
12269 if (!sym
->attr
.use_assoc
&& sym
->ns
->proc_name
12270 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12271 || sym
->ns
->proc_name
->attr
.is_main_program
))
12273 gfc_error ("%qs at %L must have constant character length "
12274 "in this context", sym
->name
, &sym
->declared_at
);
12275 specification_expr
= saved_specification_expr
;
12278 if (sym
->attr
.in_common
)
12280 gfc_error ("COMMON variable %qs at %L must have constant "
12281 "character length", sym
->name
, &sym
->declared_at
);
12282 specification_expr
= saved_specification_expr
;
12288 if (sym
->value
== NULL
&& sym
->attr
.referenced
)
12289 apply_default_init_local (sym
); /* Try to apply a default initialization. */
12291 /* Determine if the symbol may not have an initializer. */
12292 no_init_flag
= automatic_flag
= 0;
12293 if (sym
->attr
.allocatable
|| sym
->attr
.external
|| sym
->attr
.dummy
12294 || sym
->attr
.intrinsic
|| sym
->attr
.result
)
12296 else if ((sym
->attr
.dimension
|| sym
->attr
.codimension
) && !sym
->attr
.pointer
12297 && is_non_constant_shape_array (sym
))
12299 no_init_flag
= automatic_flag
= 1;
12301 /* Also, they must not have the SAVE attribute.
12302 SAVE_IMPLICIT is checked below. */
12303 if (sym
->as
&& sym
->attr
.codimension
)
12305 int corank
= sym
->as
->corank
;
12306 sym
->as
->corank
= 0;
12307 no_init_flag
= automatic_flag
= is_non_constant_shape_array (sym
);
12308 sym
->as
->corank
= corank
;
12310 if (automatic_flag
&& sym
->attr
.save
== SAVE_EXPLICIT
)
12312 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12313 specification_expr
= saved_specification_expr
;
12318 /* Ensure that any initializer is simplified. */
12320 gfc_simplify_expr (sym
->value
, 1);
12322 /* Reject illegal initializers. */
12323 if (!sym
->mark
&& sym
->value
)
12325 if (sym
->attr
.allocatable
|| (sym
->ts
.type
== BT_CLASS
12326 && CLASS_DATA (sym
)->attr
.allocatable
))
12327 gfc_error ("Allocatable %qs at %L cannot have an initializer",
12328 sym
->name
, &sym
->declared_at
);
12329 else if (sym
->attr
.external
)
12330 gfc_error ("External %qs at %L cannot have an initializer",
12331 sym
->name
, &sym
->declared_at
);
12332 else if (sym
->attr
.dummy
12333 && !(sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.intent
== INTENT_OUT
))
12334 gfc_error ("Dummy %qs at %L cannot have an initializer",
12335 sym
->name
, &sym
->declared_at
);
12336 else if (sym
->attr
.intrinsic
)
12337 gfc_error ("Intrinsic %qs at %L cannot have an initializer",
12338 sym
->name
, &sym
->declared_at
);
12339 else if (sym
->attr
.result
)
12340 gfc_error ("Function result %qs at %L cannot have an initializer",
12341 sym
->name
, &sym
->declared_at
);
12342 else if (automatic_flag
)
12343 gfc_error ("Automatic array %qs at %L cannot have an initializer",
12344 sym
->name
, &sym
->declared_at
);
12346 goto no_init_error
;
12347 specification_expr
= saved_specification_expr
;
12352 if (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
)
12354 bool res
= resolve_fl_variable_derived (sym
, no_init_flag
);
12355 specification_expr
= saved_specification_expr
;
12359 specification_expr
= saved_specification_expr
;
12364 /* Compare the dummy characteristics of a module procedure interface
12365 declaration with the corresponding declaration in a submodule. */
12366 static gfc_formal_arglist
*new_formal
;
12367 static char errmsg
[200];
12370 compare_fsyms (gfc_symbol
*sym
)
12374 if (sym
== NULL
|| new_formal
== NULL
)
12377 fsym
= new_formal
->sym
;
12382 if (strcmp (sym
->name
, fsym
->name
) == 0)
12384 if (!gfc_check_dummy_characteristics (fsym
, sym
, true, errmsg
, 200))
12385 gfc_error ("%s at %L", errmsg
, &fsym
->declared_at
);
12390 /* Resolve a procedure. */
12393 resolve_fl_procedure (gfc_symbol
*sym
, int mp_flag
)
12395 gfc_formal_arglist
*arg
;
12397 if (sym
->attr
.function
12398 && !resolve_fl_var_and_proc (sym
, mp_flag
))
12401 if (sym
->ts
.type
== BT_CHARACTER
)
12403 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
12405 if (cl
&& cl
->length
&& gfc_is_constant_expr (cl
->length
)
12406 && !resolve_charlen (cl
))
12409 if ((!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
12410 && sym
->attr
.proc
== PROC_ST_FUNCTION
)
12412 gfc_error ("Character-valued statement function %qs at %L must "
12413 "have constant length", sym
->name
, &sym
->declared_at
);
12418 /* Ensure that derived type for are not of a private type. Internal
12419 module procedures are excluded by 2.2.3.3 - i.e., they are not
12420 externally accessible and can access all the objects accessible in
12422 if (!(sym
->ns
->parent
12423 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12424 && gfc_check_symbol_access (sym
))
12426 gfc_interface
*iface
;
12428 for (arg
= gfc_sym_get_dummy_args (sym
); arg
; arg
= arg
->next
)
12431 && arg
->sym
->ts
.type
== BT_DERIVED
12432 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12433 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12434 && !gfc_notify_std (GFC_STD_F2003
, "%qs is of a PRIVATE type "
12435 "and cannot be a dummy argument"
12436 " of %qs, which is PUBLIC at %L",
12437 arg
->sym
->name
, sym
->name
,
12438 &sym
->declared_at
))
12440 /* Stop this message from recurring. */
12441 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12446 /* PUBLIC interfaces may expose PRIVATE procedures that take types
12447 PRIVATE to the containing module. */
12448 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
12450 for (arg
= gfc_sym_get_dummy_args (iface
->sym
); arg
; arg
= arg
->next
)
12453 && arg
->sym
->ts
.type
== BT_DERIVED
12454 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12455 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12456 && !gfc_notify_std (GFC_STD_F2003
, "Procedure %qs in "
12457 "PUBLIC interface %qs at %L "
12458 "takes dummy arguments of %qs which "
12459 "is PRIVATE", iface
->sym
->name
,
12460 sym
->name
, &iface
->sym
->declared_at
,
12461 gfc_typename(&arg
->sym
->ts
)))
12463 /* Stop this message from recurring. */
12464 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12471 if (sym
->attr
.function
&& sym
->value
&& sym
->attr
.proc
!= PROC_ST_FUNCTION
12472 && !sym
->attr
.proc_pointer
)
12474 gfc_error ("Function %qs at %L cannot have an initializer",
12475 sym
->name
, &sym
->declared_at
);
12479 /* An external symbol may not have an initializer because it is taken to be
12480 a procedure. Exception: Procedure Pointers. */
12481 if (sym
->attr
.external
&& sym
->value
&& !sym
->attr
.proc_pointer
)
12483 gfc_error ("External object %qs at %L may not have an initializer",
12484 sym
->name
, &sym
->declared_at
);
12488 /* An elemental function is required to return a scalar 12.7.1 */
12489 if (sym
->attr
.elemental
&& sym
->attr
.function
&& sym
->as
)
12491 gfc_error ("ELEMENTAL function %qs at %L must have a scalar "
12492 "result", sym
->name
, &sym
->declared_at
);
12493 /* Reset so that the error only occurs once. */
12494 sym
->attr
.elemental
= 0;
12498 if (sym
->attr
.proc
== PROC_ST_FUNCTION
12499 && (sym
->attr
.allocatable
|| sym
->attr
.pointer
))
12501 gfc_error ("Statement function %qs at %L may not have pointer or "
12502 "allocatable attribute", sym
->name
, &sym
->declared_at
);
12506 /* 5.1.1.5 of the Standard: A function name declared with an asterisk
12507 char-len-param shall not be array-valued, pointer-valued, recursive
12508 or pure. ....snip... A character value of * may only be used in the
12509 following ways: (i) Dummy arg of procedure - dummy associates with
12510 actual length; (ii) To declare a named constant; or (iii) External
12511 function - but length must be declared in calling scoping unit. */
12512 if (sym
->attr
.function
12513 && sym
->ts
.type
== BT_CHARACTER
&& !sym
->ts
.deferred
12514 && sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
== NULL
)
12516 if ((sym
->as
&& sym
->as
->rank
) || (sym
->attr
.pointer
)
12517 || (sym
->attr
.recursive
) || (sym
->attr
.pure
))
12519 if (sym
->as
&& sym
->as
->rank
)
12520 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12521 "array-valued", sym
->name
, &sym
->declared_at
);
12523 if (sym
->attr
.pointer
)
12524 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12525 "pointer-valued", sym
->name
, &sym
->declared_at
);
12527 if (sym
->attr
.pure
)
12528 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12529 "pure", sym
->name
, &sym
->declared_at
);
12531 if (sym
->attr
.recursive
)
12532 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12533 "recursive", sym
->name
, &sym
->declared_at
);
12538 /* Appendix B.2 of the standard. Contained functions give an
12539 error anyway. Deferred character length is an F2003 feature.
12540 Don't warn on intrinsic conversion functions, which start
12541 with two underscores. */
12542 if (!sym
->attr
.contained
&& !sym
->ts
.deferred
12543 && (sym
->name
[0] != '_' || sym
->name
[1] != '_'))
12544 gfc_notify_std (GFC_STD_F95_OBS
,
12545 "CHARACTER(*) function %qs at %L",
12546 sym
->name
, &sym
->declared_at
);
12549 /* F2008, C1218. */
12550 if (sym
->attr
.elemental
)
12552 if (sym
->attr
.proc_pointer
)
12554 gfc_error ("Procedure pointer %qs at %L shall not be elemental",
12555 sym
->name
, &sym
->declared_at
);
12558 if (sym
->attr
.dummy
)
12560 gfc_error ("Dummy procedure %qs at %L shall not be elemental",
12561 sym
->name
, &sym
->declared_at
);
12566 /* F2018, C15100: "The result of an elemental function shall be scalar,
12567 and shall not have the POINTER or ALLOCATABLE attribute." The scalar
12568 pointer is tested and caught elsewhere. */
12569 if (sym
->attr
.elemental
&& sym
->result
12570 && (sym
->result
->attr
.allocatable
|| sym
->result
->attr
.pointer
))
12572 gfc_error ("Function result variable %qs at %L of elemental "
12573 "function %qs shall not have an ALLOCATABLE or POINTER "
12574 "attribute", sym
->result
->name
,
12575 &sym
->result
->declared_at
, sym
->name
);
12579 if (sym
->attr
.is_bind_c
&& sym
->attr
.is_c_interop
!= 1)
12581 gfc_formal_arglist
*curr_arg
;
12582 int has_non_interop_arg
= 0;
12584 if (!verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
12585 sym
->common_block
))
12587 /* Clear these to prevent looking at them again if there was an
12589 sym
->attr
.is_bind_c
= 0;
12590 sym
->attr
.is_c_interop
= 0;
12591 sym
->ts
.is_c_interop
= 0;
12595 /* So far, no errors have been found. */
12596 sym
->attr
.is_c_interop
= 1;
12597 sym
->ts
.is_c_interop
= 1;
12600 curr_arg
= gfc_sym_get_dummy_args (sym
);
12601 while (curr_arg
!= NULL
)
12603 /* Skip implicitly typed dummy args here. */
12604 if (curr_arg
->sym
&& curr_arg
->sym
->attr
.implicit_type
== 0)
12605 if (!gfc_verify_c_interop_param (curr_arg
->sym
))
12606 /* If something is found to fail, record the fact so we
12607 can mark the symbol for the procedure as not being
12608 BIND(C) to try and prevent multiple errors being
12610 has_non_interop_arg
= 1;
12612 curr_arg
= curr_arg
->next
;
12615 /* See if any of the arguments were not interoperable and if so, clear
12616 the procedure symbol to prevent duplicate error messages. */
12617 if (has_non_interop_arg
!= 0)
12619 sym
->attr
.is_c_interop
= 0;
12620 sym
->ts
.is_c_interop
= 0;
12621 sym
->attr
.is_bind_c
= 0;
12625 if (!sym
->attr
.proc_pointer
)
12627 if (sym
->attr
.save
== SAVE_EXPLICIT
)
12629 gfc_error ("PROCEDURE attribute conflicts with SAVE attribute "
12630 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12633 if (sym
->attr
.intent
)
12635 gfc_error ("PROCEDURE attribute conflicts with INTENT attribute "
12636 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12639 if (sym
->attr
.subroutine
&& sym
->attr
.result
)
12641 gfc_error ("PROCEDURE attribute conflicts with RESULT attribute "
12642 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12645 if (sym
->attr
.external
&& sym
->attr
.function
&& !sym
->attr
.module_procedure
12646 && ((sym
->attr
.if_source
== IFSRC_DECL
&& !sym
->attr
.procedure
)
12647 || sym
->attr
.contained
))
12649 gfc_error ("EXTERNAL attribute conflicts with FUNCTION attribute "
12650 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12653 if (strcmp ("ppr@", sym
->name
) == 0)
12655 gfc_error ("Procedure pointer result %qs at %L "
12656 "is missing the pointer attribute",
12657 sym
->ns
->proc_name
->name
, &sym
->declared_at
);
12662 /* Assume that a procedure whose body is not known has references
12663 to external arrays. */
12664 if (sym
->attr
.if_source
!= IFSRC_DECL
)
12665 sym
->attr
.array_outer_dependency
= 1;
12667 /* Compare the characteristics of a module procedure with the
12668 interface declaration. Ideally this would be done with
12669 gfc_compare_interfaces but, at present, the formal interface
12670 cannot be copied to the ts.interface. */
12671 if (sym
->attr
.module_procedure
12672 && sym
->attr
.if_source
== IFSRC_DECL
)
12675 char name
[2*GFC_MAX_SYMBOL_LEN
+ 1];
12677 char *submodule_name
;
12678 strcpy (name
, sym
->ns
->proc_name
->name
);
12679 module_name
= strtok (name
, ".");
12680 submodule_name
= strtok (NULL
, ".");
12682 iface
= sym
->tlink
;
12685 /* Make sure that the result uses the correct charlen for deferred
12687 if (iface
&& sym
->result
12688 && iface
->ts
.type
== BT_CHARACTER
12689 && iface
->ts
.deferred
)
12690 sym
->result
->ts
.u
.cl
= iface
->ts
.u
.cl
;
12695 /* Check the procedure characteristics. */
12696 if (sym
->attr
.elemental
!= iface
->attr
.elemental
)
12698 gfc_error ("Mismatch in ELEMENTAL attribute between MODULE "
12699 "PROCEDURE at %L and its interface in %s",
12700 &sym
->declared_at
, module_name
);
12704 if (sym
->attr
.pure
!= iface
->attr
.pure
)
12706 gfc_error ("Mismatch in PURE attribute between MODULE "
12707 "PROCEDURE at %L and its interface in %s",
12708 &sym
->declared_at
, module_name
);
12712 if (sym
->attr
.recursive
!= iface
->attr
.recursive
)
12714 gfc_error ("Mismatch in RECURSIVE attribute between MODULE "
12715 "PROCEDURE at %L and its interface in %s",
12716 &sym
->declared_at
, module_name
);
12720 /* Check the result characteristics. */
12721 if (!gfc_check_result_characteristics (sym
, iface
, errmsg
, 200))
12723 gfc_error ("%s between the MODULE PROCEDURE declaration "
12724 "in MODULE %qs and the declaration at %L in "
12726 errmsg
, module_name
, &sym
->declared_at
,
12727 submodule_name
? submodule_name
: module_name
);
12732 /* Check the characteristics of the formal arguments. */
12733 if (sym
->formal
&& sym
->formal_ns
)
12735 for (arg
= sym
->formal
; arg
&& arg
->sym
; arg
= arg
->next
)
12738 gfc_traverse_ns (sym
->formal_ns
, compare_fsyms
);
12746 /* Resolve a list of finalizer procedures. That is, after they have hopefully
12747 been defined and we now know their defined arguments, check that they fulfill
12748 the requirements of the standard for procedures used as finalizers. */
12751 gfc_resolve_finalizers (gfc_symbol
* derived
, bool *finalizable
)
12753 gfc_finalizer
* list
;
12754 gfc_finalizer
** prev_link
; /* For removing wrong entries from the list. */
12755 bool result
= true;
12756 bool seen_scalar
= false;
12759 gfc_symbol
*parent
= gfc_get_derived_super_type (derived
);
12762 gfc_resolve_finalizers (parent
, finalizable
);
12764 /* Ensure that derived-type components have a their finalizers resolved. */
12765 bool has_final
= derived
->f2k_derived
&& derived
->f2k_derived
->finalizers
;
12766 for (c
= derived
->components
; c
; c
= c
->next
)
12767 if (c
->ts
.type
== BT_DERIVED
12768 && !c
->attr
.pointer
&& !c
->attr
.proc_pointer
&& !c
->attr
.allocatable
)
12770 bool has_final2
= false;
12771 if (!gfc_resolve_finalizers (c
->ts
.u
.derived
, &has_final2
))
12772 return false; /* Error. */
12773 has_final
= has_final
|| has_final2
;
12775 /* Return early if not finalizable. */
12779 *finalizable
= false;
12783 /* Walk over the list of finalizer-procedures, check them, and if any one
12784 does not fit in with the standard's definition, print an error and remove
12785 it from the list. */
12786 prev_link
= &derived
->f2k_derived
->finalizers
;
12787 for (list
= derived
->f2k_derived
->finalizers
; list
; list
= *prev_link
)
12789 gfc_formal_arglist
*dummy_args
;
12794 /* Skip this finalizer if we already resolved it. */
12795 if (list
->proc_tree
)
12797 if (list
->proc_tree
->n
.sym
->formal
->sym
->as
== NULL
12798 || list
->proc_tree
->n
.sym
->formal
->sym
->as
->rank
== 0)
12799 seen_scalar
= true;
12800 prev_link
= &(list
->next
);
12804 /* Check this exists and is a SUBROUTINE. */
12805 if (!list
->proc_sym
->attr
.subroutine
)
12807 gfc_error ("FINAL procedure %qs at %L is not a SUBROUTINE",
12808 list
->proc_sym
->name
, &list
->where
);
12812 /* We should have exactly one argument. */
12813 dummy_args
= gfc_sym_get_dummy_args (list
->proc_sym
);
12814 if (!dummy_args
|| dummy_args
->next
)
12816 gfc_error ("FINAL procedure at %L must have exactly one argument",
12820 arg
= dummy_args
->sym
;
12822 /* This argument must be of our type. */
12823 if (arg
->ts
.type
!= BT_DERIVED
|| arg
->ts
.u
.derived
!= derived
)
12825 gfc_error ("Argument of FINAL procedure at %L must be of type %qs",
12826 &arg
->declared_at
, derived
->name
);
12830 /* It must neither be a pointer nor allocatable nor optional. */
12831 if (arg
->attr
.pointer
)
12833 gfc_error ("Argument of FINAL procedure at %L must not be a POINTER",
12834 &arg
->declared_at
);
12837 if (arg
->attr
.allocatable
)
12839 gfc_error ("Argument of FINAL procedure at %L must not be"
12840 " ALLOCATABLE", &arg
->declared_at
);
12843 if (arg
->attr
.optional
)
12845 gfc_error ("Argument of FINAL procedure at %L must not be OPTIONAL",
12846 &arg
->declared_at
);
12850 /* It must not be INTENT(OUT). */
12851 if (arg
->attr
.intent
== INTENT_OUT
)
12853 gfc_error ("Argument of FINAL procedure at %L must not be"
12854 " INTENT(OUT)", &arg
->declared_at
);
12858 /* Warn if the procedure is non-scalar and not assumed shape. */
12859 if (warn_surprising
&& arg
->as
&& arg
->as
->rank
!= 0
12860 && arg
->as
->type
!= AS_ASSUMED_SHAPE
)
12861 gfc_warning (OPT_Wsurprising
,
12862 "Non-scalar FINAL procedure at %L should have assumed"
12863 " shape argument", &arg
->declared_at
);
12865 /* Check that it does not match in kind and rank with a FINAL procedure
12866 defined earlier. To really loop over the *earlier* declarations,
12867 we need to walk the tail of the list as new ones were pushed at the
12869 /* TODO: Handle kind parameters once they are implemented. */
12870 my_rank
= (arg
->as
? arg
->as
->rank
: 0);
12871 for (i
= list
->next
; i
; i
= i
->next
)
12873 gfc_formal_arglist
*dummy_args
;
12875 /* Argument list might be empty; that is an error signalled earlier,
12876 but we nevertheless continued resolving. */
12877 dummy_args
= gfc_sym_get_dummy_args (i
->proc_sym
);
12880 gfc_symbol
* i_arg
= dummy_args
->sym
;
12881 const int i_rank
= (i_arg
->as
? i_arg
->as
->rank
: 0);
12882 if (i_rank
== my_rank
)
12884 gfc_error ("FINAL procedure %qs declared at %L has the same"
12885 " rank (%d) as %qs",
12886 list
->proc_sym
->name
, &list
->where
, my_rank
,
12887 i
->proc_sym
->name
);
12893 /* Is this the/a scalar finalizer procedure? */
12895 seen_scalar
= true;
12897 /* Find the symtree for this procedure. */
12898 gcc_assert (!list
->proc_tree
);
12899 list
->proc_tree
= gfc_find_sym_in_symtree (list
->proc_sym
);
12901 prev_link
= &list
->next
;
12904 /* Remove wrong nodes immediately from the list so we don't risk any
12905 troubles in the future when they might fail later expectations. */
12908 *prev_link
= list
->next
;
12909 gfc_free_finalizer (i
);
12913 if (result
== false)
12916 /* Warn if we haven't seen a scalar finalizer procedure (but we know there
12917 were nodes in the list, must have been for arrays. It is surely a good
12918 idea to have a scalar version there if there's something to finalize. */
12919 if (warn_surprising
&& derived
->f2k_derived
->finalizers
&& !seen_scalar
)
12920 gfc_warning (OPT_Wsurprising
,
12921 "Only array FINAL procedures declared for derived type %qs"
12922 " defined at %L, suggest also scalar one",
12923 derived
->name
, &derived
->declared_at
);
12925 vtab
= gfc_find_derived_vtab (derived
);
12926 c
= vtab
->ts
.u
.derived
->components
->next
->next
->next
->next
->next
;
12927 gfc_set_sym_referenced (c
->initializer
->symtree
->n
.sym
);
12930 *finalizable
= true;
12936 /* Check if two GENERIC targets are ambiguous and emit an error is they are. */
12939 check_generic_tbp_ambiguity (gfc_tbp_generic
* t1
, gfc_tbp_generic
* t2
,
12940 const char* generic_name
, locus where
)
12942 gfc_symbol
*sym1
, *sym2
;
12943 const char *pass1
, *pass2
;
12944 gfc_formal_arglist
*dummy_args
;
12946 gcc_assert (t1
->specific
&& t2
->specific
);
12947 gcc_assert (!t1
->specific
->is_generic
);
12948 gcc_assert (!t2
->specific
->is_generic
);
12949 gcc_assert (t1
->is_operator
== t2
->is_operator
);
12951 sym1
= t1
->specific
->u
.specific
->n
.sym
;
12952 sym2
= t2
->specific
->u
.specific
->n
.sym
;
12957 /* Both must be SUBROUTINEs or both must be FUNCTIONs. */
12958 if (sym1
->attr
.subroutine
!= sym2
->attr
.subroutine
12959 || sym1
->attr
.function
!= sym2
->attr
.function
)
12961 gfc_error ("%qs and %qs can't be mixed FUNCTION/SUBROUTINE for"
12962 " GENERIC %qs at %L",
12963 sym1
->name
, sym2
->name
, generic_name
, &where
);
12967 /* Determine PASS arguments. */
12968 if (t1
->specific
->nopass
)
12970 else if (t1
->specific
->pass_arg
)
12971 pass1
= t1
->specific
->pass_arg
;
12974 dummy_args
= gfc_sym_get_dummy_args (t1
->specific
->u
.specific
->n
.sym
);
12976 pass1
= dummy_args
->sym
->name
;
12980 if (t2
->specific
->nopass
)
12982 else if (t2
->specific
->pass_arg
)
12983 pass2
= t2
->specific
->pass_arg
;
12986 dummy_args
= gfc_sym_get_dummy_args (t2
->specific
->u
.specific
->n
.sym
);
12988 pass2
= dummy_args
->sym
->name
;
12993 /* Compare the interfaces. */
12994 if (gfc_compare_interfaces (sym1
, sym2
, sym2
->name
, !t1
->is_operator
, 0,
12995 NULL
, 0, pass1
, pass2
))
12997 gfc_error ("%qs and %qs for GENERIC %qs at %L are ambiguous",
12998 sym1
->name
, sym2
->name
, generic_name
, &where
);
13006 /* Worker function for resolving a generic procedure binding; this is used to
13007 resolve GENERIC as well as user and intrinsic OPERATOR typebound procedures.
13009 The difference between those cases is finding possible inherited bindings
13010 that are overridden, as one has to look for them in tb_sym_root,
13011 tb_uop_root or tb_op, respectively. Thus the caller must already find
13012 the super-type and set p->overridden correctly. */
13015 resolve_tb_generic_targets (gfc_symbol
* super_type
,
13016 gfc_typebound_proc
* p
, const char* name
)
13018 gfc_tbp_generic
* target
;
13019 gfc_symtree
* first_target
;
13020 gfc_symtree
* inherited
;
13022 gcc_assert (p
&& p
->is_generic
);
13024 /* Try to find the specific bindings for the symtrees in our target-list. */
13025 gcc_assert (p
->u
.generic
);
13026 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13027 if (!target
->specific
)
13029 gfc_typebound_proc
* overridden_tbp
;
13030 gfc_tbp_generic
* g
;
13031 const char* target_name
;
13033 target_name
= target
->specific_st
->name
;
13035 /* Defined for this type directly. */
13036 if (target
->specific_st
->n
.tb
&& !target
->specific_st
->n
.tb
->error
)
13038 target
->specific
= target
->specific_st
->n
.tb
;
13039 goto specific_found
;
13042 /* Look for an inherited specific binding. */
13045 inherited
= gfc_find_typebound_proc (super_type
, NULL
, target_name
,
13050 gcc_assert (inherited
->n
.tb
);
13051 target
->specific
= inherited
->n
.tb
;
13052 goto specific_found
;
13056 gfc_error ("Undefined specific binding %qs as target of GENERIC %qs"
13057 " at %L", target_name
, name
, &p
->where
);
13060 /* Once we've found the specific binding, check it is not ambiguous with
13061 other specifics already found or inherited for the same GENERIC. */
13063 gcc_assert (target
->specific
);
13065 /* This must really be a specific binding! */
13066 if (target
->specific
->is_generic
)
13068 gfc_error ("GENERIC %qs at %L must target a specific binding,"
13069 " %qs is GENERIC, too", name
, &p
->where
, target_name
);
13073 /* Check those already resolved on this type directly. */
13074 for (g
= p
->u
.generic
; g
; g
= g
->next
)
13075 if (g
!= target
&& g
->specific
13076 && !check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13079 /* Check for ambiguity with inherited specific targets. */
13080 for (overridden_tbp
= p
->overridden
; overridden_tbp
;
13081 overridden_tbp
= overridden_tbp
->overridden
)
13082 if (overridden_tbp
->is_generic
)
13084 for (g
= overridden_tbp
->u
.generic
; g
; g
= g
->next
)
13086 gcc_assert (g
->specific
);
13087 if (!check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13093 /* If we attempt to "overwrite" a specific binding, this is an error. */
13094 if (p
->overridden
&& !p
->overridden
->is_generic
)
13096 gfc_error ("GENERIC %qs at %L can't overwrite specific binding with"
13097 " the same name", name
, &p
->where
);
13101 /* Take the SUBROUTINE/FUNCTION attributes of the first specific target, as
13102 all must have the same attributes here. */
13103 first_target
= p
->u
.generic
->specific
->u
.specific
;
13104 gcc_assert (first_target
);
13105 p
->subroutine
= first_target
->n
.sym
->attr
.subroutine
;
13106 p
->function
= first_target
->n
.sym
->attr
.function
;
13112 /* Resolve a GENERIC procedure binding for a derived type. */
13115 resolve_typebound_generic (gfc_symbol
* derived
, gfc_symtree
* st
)
13117 gfc_symbol
* super_type
;
13119 /* Find the overridden binding if any. */
13120 st
->n
.tb
->overridden
= NULL
;
13121 super_type
= gfc_get_derived_super_type (derived
);
13124 gfc_symtree
* overridden
;
13125 overridden
= gfc_find_typebound_proc (super_type
, NULL
, st
->name
,
13128 if (overridden
&& overridden
->n
.tb
)
13129 st
->n
.tb
->overridden
= overridden
->n
.tb
;
13132 /* Resolve using worker function. */
13133 return resolve_tb_generic_targets (super_type
, st
->n
.tb
, st
->name
);
13137 /* Retrieve the target-procedure of an operator binding and do some checks in
13138 common for intrinsic and user-defined type-bound operators. */
13141 get_checked_tb_operator_target (gfc_tbp_generic
* target
, locus where
)
13143 gfc_symbol
* target_proc
;
13145 gcc_assert (target
->specific
&& !target
->specific
->is_generic
);
13146 target_proc
= target
->specific
->u
.specific
->n
.sym
;
13147 gcc_assert (target_proc
);
13149 /* F08:C468. All operator bindings must have a passed-object dummy argument. */
13150 if (target
->specific
->nopass
)
13152 gfc_error ("Type-bound operator at %L can't be NOPASS", &where
);
13156 return target_proc
;
13160 /* Resolve a type-bound intrinsic operator. */
13163 resolve_typebound_intrinsic_op (gfc_symbol
* derived
, gfc_intrinsic_op op
,
13164 gfc_typebound_proc
* p
)
13166 gfc_symbol
* super_type
;
13167 gfc_tbp_generic
* target
;
13169 /* If there's already an error here, do nothing (but don't fail again). */
13173 /* Operators should always be GENERIC bindings. */
13174 gcc_assert (p
->is_generic
);
13176 /* Look for an overridden binding. */
13177 super_type
= gfc_get_derived_super_type (derived
);
13178 if (super_type
&& super_type
->f2k_derived
)
13179 p
->overridden
= gfc_find_typebound_intrinsic_op (super_type
, NULL
,
13182 p
->overridden
= NULL
;
13184 /* Resolve general GENERIC properties using worker function. */
13185 if (!resolve_tb_generic_targets (super_type
, p
, gfc_op2string(op
)))
13188 /* Check the targets to be procedures of correct interface. */
13189 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13191 gfc_symbol
* target_proc
;
13193 target_proc
= get_checked_tb_operator_target (target
, p
->where
);
13197 if (!gfc_check_operator_interface (target_proc
, op
, p
->where
))
13200 /* Add target to non-typebound operator list. */
13201 if (!target
->specific
->deferred
&& !derived
->attr
.use_assoc
13202 && p
->access
!= ACCESS_PRIVATE
&& derived
->ns
== gfc_current_ns
)
13204 gfc_interface
*head
, *intr
;
13206 /* Preempt 'gfc_check_new_interface' for submodules, where the
13207 mechanism for handling module procedures winds up resolving
13208 operator interfaces twice and would otherwise cause an error. */
13209 for (intr
= derived
->ns
->op
[op
]; intr
; intr
= intr
->next
)
13210 if (intr
->sym
== target_proc
13211 && target_proc
->attr
.used_in_submodule
)
13214 if (!gfc_check_new_interface (derived
->ns
->op
[op
],
13215 target_proc
, p
->where
))
13217 head
= derived
->ns
->op
[op
];
13218 intr
= gfc_get_interface ();
13219 intr
->sym
= target_proc
;
13220 intr
->where
= p
->where
;
13222 derived
->ns
->op
[op
] = intr
;
13234 /* Resolve a type-bound user operator (tree-walker callback). */
13236 static gfc_symbol
* resolve_bindings_derived
;
13237 static bool resolve_bindings_result
;
13239 static bool check_uop_procedure (gfc_symbol
* sym
, locus where
);
13242 resolve_typebound_user_op (gfc_symtree
* stree
)
13244 gfc_symbol
* super_type
;
13245 gfc_tbp_generic
* target
;
13247 gcc_assert (stree
&& stree
->n
.tb
);
13249 if (stree
->n
.tb
->error
)
13252 /* Operators should always be GENERIC bindings. */
13253 gcc_assert (stree
->n
.tb
->is_generic
);
13255 /* Find overridden procedure, if any. */
13256 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13257 if (super_type
&& super_type
->f2k_derived
)
13259 gfc_symtree
* overridden
;
13260 overridden
= gfc_find_typebound_user_op (super_type
, NULL
,
13261 stree
->name
, true, NULL
);
13263 if (overridden
&& overridden
->n
.tb
)
13264 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13267 stree
->n
.tb
->overridden
= NULL
;
13269 /* Resolve basically using worker function. */
13270 if (!resolve_tb_generic_targets (super_type
, stree
->n
.tb
, stree
->name
))
13273 /* Check the targets to be functions of correct interface. */
13274 for (target
= stree
->n
.tb
->u
.generic
; target
; target
= target
->next
)
13276 gfc_symbol
* target_proc
;
13278 target_proc
= get_checked_tb_operator_target (target
, stree
->n
.tb
->where
);
13282 if (!check_uop_procedure (target_proc
, stree
->n
.tb
->where
))
13289 resolve_bindings_result
= false;
13290 stree
->n
.tb
->error
= 1;
13294 /* Resolve the type-bound procedures for a derived type. */
13297 resolve_typebound_procedure (gfc_symtree
* stree
)
13301 gfc_symbol
* me_arg
;
13302 gfc_symbol
* super_type
;
13303 gfc_component
* comp
;
13305 gcc_assert (stree
);
13307 /* Undefined specific symbol from GENERIC target definition. */
13311 if (stree
->n
.tb
->error
)
13314 /* If this is a GENERIC binding, use that routine. */
13315 if (stree
->n
.tb
->is_generic
)
13317 if (!resolve_typebound_generic (resolve_bindings_derived
, stree
))
13322 /* Get the target-procedure to check it. */
13323 gcc_assert (!stree
->n
.tb
->is_generic
);
13324 gcc_assert (stree
->n
.tb
->u
.specific
);
13325 proc
= stree
->n
.tb
->u
.specific
->n
.sym
;
13326 where
= stree
->n
.tb
->where
;
13328 /* Default access should already be resolved from the parser. */
13329 gcc_assert (stree
->n
.tb
->access
!= ACCESS_UNKNOWN
);
13331 if (stree
->n
.tb
->deferred
)
13333 if (!check_proc_interface (proc
, &where
))
13338 /* Check for F08:C465. */
13339 if ((!proc
->attr
.subroutine
&& !proc
->attr
.function
)
13340 || (proc
->attr
.proc
!= PROC_MODULE
13341 && proc
->attr
.if_source
!= IFSRC_IFBODY
)
13342 || proc
->attr
.abstract
)
13344 gfc_error ("%qs must be a module procedure or an external procedure with"
13345 " an explicit interface at %L", proc
->name
, &where
);
13350 stree
->n
.tb
->subroutine
= proc
->attr
.subroutine
;
13351 stree
->n
.tb
->function
= proc
->attr
.function
;
13353 /* Find the super-type of the current derived type. We could do this once and
13354 store in a global if speed is needed, but as long as not I believe this is
13355 more readable and clearer. */
13356 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13358 /* If PASS, resolve and check arguments if not already resolved / loaded
13359 from a .mod file. */
13360 if (!stree
->n
.tb
->nopass
&& stree
->n
.tb
->pass_arg_num
== 0)
13362 gfc_formal_arglist
*dummy_args
;
13364 dummy_args
= gfc_sym_get_dummy_args (proc
);
13365 if (stree
->n
.tb
->pass_arg
)
13367 gfc_formal_arglist
*i
;
13369 /* If an explicit passing argument name is given, walk the arg-list
13370 and look for it. */
13373 stree
->n
.tb
->pass_arg_num
= 1;
13374 for (i
= dummy_args
; i
; i
= i
->next
)
13376 if (!strcmp (i
->sym
->name
, stree
->n
.tb
->pass_arg
))
13381 ++stree
->n
.tb
->pass_arg_num
;
13386 gfc_error ("Procedure %qs with PASS(%s) at %L has no"
13388 proc
->name
, stree
->n
.tb
->pass_arg
, &where
,
13389 stree
->n
.tb
->pass_arg
);
13395 /* Otherwise, take the first one; there should in fact be at least
13397 stree
->n
.tb
->pass_arg_num
= 1;
13400 gfc_error ("Procedure %qs with PASS at %L must have at"
13401 " least one argument", proc
->name
, &where
);
13404 me_arg
= dummy_args
->sym
;
13407 /* Now check that the argument-type matches and the passed-object
13408 dummy argument is generally fine. */
13410 gcc_assert (me_arg
);
13412 if (me_arg
->ts
.type
!= BT_CLASS
)
13414 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13415 " at %L", proc
->name
, &where
);
13419 if (CLASS_DATA (me_arg
)->ts
.u
.derived
13420 != resolve_bindings_derived
)
13422 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13423 " the derived-type %qs", me_arg
->name
, proc
->name
,
13424 me_arg
->name
, &where
, resolve_bindings_derived
->name
);
13428 gcc_assert (me_arg
->ts
.type
== BT_CLASS
);
13429 if (CLASS_DATA (me_arg
)->as
&& CLASS_DATA (me_arg
)->as
->rank
!= 0)
13431 gfc_error ("Passed-object dummy argument of %qs at %L must be"
13432 " scalar", proc
->name
, &where
);
13435 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13437 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13438 " be ALLOCATABLE", proc
->name
, &where
);
13441 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13443 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13444 " be POINTER", proc
->name
, &where
);
13449 /* If we are extending some type, check that we don't override a procedure
13450 flagged NON_OVERRIDABLE. */
13451 stree
->n
.tb
->overridden
= NULL
;
13454 gfc_symtree
* overridden
;
13455 overridden
= gfc_find_typebound_proc (super_type
, NULL
,
13456 stree
->name
, true, NULL
);
13460 if (overridden
->n
.tb
)
13461 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13463 if (!gfc_check_typebound_override (stree
, overridden
))
13468 /* See if there's a name collision with a component directly in this type. */
13469 for (comp
= resolve_bindings_derived
->components
; comp
; comp
= comp
->next
)
13470 if (!strcmp (comp
->name
, stree
->name
))
13472 gfc_error ("Procedure %qs at %L has the same name as a component of"
13474 stree
->name
, &where
, resolve_bindings_derived
->name
);
13478 /* Try to find a name collision with an inherited component. */
13479 if (super_type
&& gfc_find_component (super_type
, stree
->name
, true, true,
13482 gfc_error ("Procedure %qs at %L has the same name as an inherited"
13483 " component of %qs",
13484 stree
->name
, &where
, resolve_bindings_derived
->name
);
13488 stree
->n
.tb
->error
= 0;
13492 resolve_bindings_result
= false;
13493 stree
->n
.tb
->error
= 1;
13498 resolve_typebound_procedures (gfc_symbol
* derived
)
13501 gfc_symbol
* super_type
;
13503 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->tb_sym_root
)
13506 super_type
= gfc_get_derived_super_type (derived
);
13508 resolve_symbol (super_type
);
13510 resolve_bindings_derived
= derived
;
13511 resolve_bindings_result
= true;
13513 if (derived
->f2k_derived
->tb_sym_root
)
13514 gfc_traverse_symtree (derived
->f2k_derived
->tb_sym_root
,
13515 &resolve_typebound_procedure
);
13517 if (derived
->f2k_derived
->tb_uop_root
)
13518 gfc_traverse_symtree (derived
->f2k_derived
->tb_uop_root
,
13519 &resolve_typebound_user_op
);
13521 for (op
= 0; op
!= GFC_INTRINSIC_OPS
; ++op
)
13523 gfc_typebound_proc
* p
= derived
->f2k_derived
->tb_op
[op
];
13524 if (p
&& !resolve_typebound_intrinsic_op (derived
,
13525 (gfc_intrinsic_op
)op
, p
))
13526 resolve_bindings_result
= false;
13529 return resolve_bindings_result
;
13533 /* Add a derived type to the dt_list. The dt_list is used in trans-types.c
13534 to give all identical derived types the same backend_decl. */
13536 add_dt_to_dt_list (gfc_symbol
*derived
)
13538 if (!derived
->dt_next
)
13540 if (gfc_derived_types
)
13542 derived
->dt_next
= gfc_derived_types
->dt_next
;
13543 gfc_derived_types
->dt_next
= derived
;
13547 derived
->dt_next
= derived
;
13549 gfc_derived_types
= derived
;
13554 /* Ensure that a derived-type is really not abstract, meaning that every
13555 inherited DEFERRED binding is overridden by a non-DEFERRED one. */
13558 ensure_not_abstract_walker (gfc_symbol
* sub
, gfc_symtree
* st
)
13563 if (!ensure_not_abstract_walker (sub
, st
->left
))
13565 if (!ensure_not_abstract_walker (sub
, st
->right
))
13568 if (st
->n
.tb
&& st
->n
.tb
->deferred
)
13570 gfc_symtree
* overriding
;
13571 overriding
= gfc_find_typebound_proc (sub
, NULL
, st
->name
, true, NULL
);
13574 gcc_assert (overriding
->n
.tb
);
13575 if (overriding
->n
.tb
->deferred
)
13577 gfc_error ("Derived-type %qs declared at %L must be ABSTRACT because"
13578 " %qs is DEFERRED and not overridden",
13579 sub
->name
, &sub
->declared_at
, st
->name
);
13588 ensure_not_abstract (gfc_symbol
* sub
, gfc_symbol
* ancestor
)
13590 /* The algorithm used here is to recursively travel up the ancestry of sub
13591 and for each ancestor-type, check all bindings. If any of them is
13592 DEFERRED, look it up starting from sub and see if the found (overriding)
13593 binding is not DEFERRED.
13594 This is not the most efficient way to do this, but it should be ok and is
13595 clearer than something sophisticated. */
13597 gcc_assert (ancestor
&& !sub
->attr
.abstract
);
13599 if (!ancestor
->attr
.abstract
)
13602 /* Walk bindings of this ancestor. */
13603 if (ancestor
->f2k_derived
)
13606 t
= ensure_not_abstract_walker (sub
, ancestor
->f2k_derived
->tb_sym_root
);
13611 /* Find next ancestor type and recurse on it. */
13612 ancestor
= gfc_get_derived_super_type (ancestor
);
13614 return ensure_not_abstract (sub
, ancestor
);
13620 /* This check for typebound defined assignments is done recursively
13621 since the order in which derived types are resolved is not always in
13622 order of the declarations. */
13625 check_defined_assignments (gfc_symbol
*derived
)
13629 for (c
= derived
->components
; c
; c
= c
->next
)
13631 if (!gfc_bt_struct (c
->ts
.type
)
13633 || c
->attr
.allocatable
13634 || c
->attr
.proc_pointer_comp
13635 || c
->attr
.class_pointer
13636 || c
->attr
.proc_pointer
)
13639 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
13640 || (c
->ts
.u
.derived
->f2k_derived
13641 && c
->ts
.u
.derived
->f2k_derived
->tb_op
[INTRINSIC_ASSIGN
]))
13643 derived
->attr
.defined_assign_comp
= 1;
13647 check_defined_assignments (c
->ts
.u
.derived
);
13648 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
13650 derived
->attr
.defined_assign_comp
= 1;
13657 /* Resolve a single component of a derived type or structure. */
13660 resolve_component (gfc_component
*c
, gfc_symbol
*sym
)
13662 gfc_symbol
*super_type
;
13664 if (c
->attr
.artificial
)
13667 /* Do not allow vtype components to be resolved in nameless namespaces
13668 such as block data because the procedure pointers will cause ICEs
13669 and vtables are not needed in these contexts. */
13670 if (sym
->attr
.vtype
&& sym
->attr
.use_assoc
13671 && sym
->ns
->proc_name
== NULL
)
13675 if ((!sym
->attr
.is_class
|| c
!= sym
->components
)
13676 && c
->attr
.codimension
13677 && (!c
->attr
.allocatable
|| (c
->as
&& c
->as
->type
!= AS_DEFERRED
)))
13679 gfc_error ("Coarray component %qs at %L must be allocatable with "
13680 "deferred shape", c
->name
, &c
->loc
);
13685 if (c
->attr
.codimension
&& c
->ts
.type
== BT_DERIVED
13686 && c
->ts
.u
.derived
->ts
.is_iso_c
)
13688 gfc_error ("Component %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
13689 "shall not be a coarray", c
->name
, &c
->loc
);
13694 if (gfc_bt_struct (c
->ts
.type
) && c
->ts
.u
.derived
->attr
.coarray_comp
13695 && (c
->attr
.codimension
|| c
->attr
.pointer
|| c
->attr
.dimension
13696 || c
->attr
.allocatable
))
13698 gfc_error ("Component %qs at %L with coarray component "
13699 "shall be a nonpointer, nonallocatable scalar",
13705 if (c
->attr
.contiguous
&& (!c
->attr
.dimension
|| !c
->attr
.pointer
))
13707 gfc_error ("Component %qs at %L has the CONTIGUOUS attribute but "
13708 "is not an array pointer", c
->name
, &c
->loc
);
13712 /* F2003, 15.2.1 - length has to be one. */
13713 if (sym
->attr
.is_bind_c
&& c
->ts
.type
== BT_CHARACTER
13714 && (c
->ts
.u
.cl
== NULL
|| c
->ts
.u
.cl
->length
== NULL
13715 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
)
13716 || mpz_cmp_si (c
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
13718 gfc_error ("Component %qs of BIND(C) type at %L must have length one",
13723 if (c
->attr
.proc_pointer
&& c
->ts
.interface
)
13725 gfc_symbol
*ifc
= c
->ts
.interface
;
13727 if (!sym
->attr
.vtype
&& !check_proc_interface (ifc
, &c
->loc
))
13733 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
13735 /* Resolve interface and copy attributes. */
13736 if (ifc
->formal
&& !ifc
->formal_ns
)
13737 resolve_symbol (ifc
);
13738 if (ifc
->attr
.intrinsic
)
13739 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
13743 c
->ts
= ifc
->result
->ts
;
13744 c
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
13745 c
->attr
.pointer
= ifc
->result
->attr
.pointer
;
13746 c
->attr
.dimension
= ifc
->result
->attr
.dimension
;
13747 c
->as
= gfc_copy_array_spec (ifc
->result
->as
);
13748 c
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
13753 c
->attr
.allocatable
= ifc
->attr
.allocatable
;
13754 c
->attr
.pointer
= ifc
->attr
.pointer
;
13755 c
->attr
.dimension
= ifc
->attr
.dimension
;
13756 c
->as
= gfc_copy_array_spec (ifc
->as
);
13757 c
->attr
.class_ok
= ifc
->attr
.class_ok
;
13759 c
->ts
.interface
= ifc
;
13760 c
->attr
.function
= ifc
->attr
.function
;
13761 c
->attr
.subroutine
= ifc
->attr
.subroutine
;
13763 c
->attr
.pure
= ifc
->attr
.pure
;
13764 c
->attr
.elemental
= ifc
->attr
.elemental
;
13765 c
->attr
.recursive
= ifc
->attr
.recursive
;
13766 c
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
13767 c
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
13768 /* Copy char length. */
13769 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
13771 gfc_charlen
*cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
13772 if (cl
->length
&& !cl
->resolved
13773 && !gfc_resolve_expr (cl
->length
))
13782 else if (c
->attr
.proc_pointer
&& c
->ts
.type
== BT_UNKNOWN
)
13784 /* Since PPCs are not implicitly typed, a PPC without an explicit
13785 interface must be a subroutine. */
13786 gfc_add_subroutine (&c
->attr
, c
->name
, &c
->loc
);
13789 /* Procedure pointer components: Check PASS arg. */
13790 if (c
->attr
.proc_pointer
&& !c
->tb
->nopass
&& c
->tb
->pass_arg_num
== 0
13791 && !sym
->attr
.vtype
)
13793 gfc_symbol
* me_arg
;
13795 if (c
->tb
->pass_arg
)
13797 gfc_formal_arglist
* i
;
13799 /* If an explicit passing argument name is given, walk the arg-list
13800 and look for it. */
13803 c
->tb
->pass_arg_num
= 1;
13804 for (i
= c
->ts
.interface
->formal
; i
; i
= i
->next
)
13806 if (!strcmp (i
->sym
->name
, c
->tb
->pass_arg
))
13811 c
->tb
->pass_arg_num
++;
13816 gfc_error ("Procedure pointer component %qs with PASS(%s) "
13817 "at %L has no argument %qs", c
->name
,
13818 c
->tb
->pass_arg
, &c
->loc
, c
->tb
->pass_arg
);
13825 /* Otherwise, take the first one; there should in fact be at least
13827 c
->tb
->pass_arg_num
= 1;
13828 if (!c
->ts
.interface
->formal
)
13830 gfc_error ("Procedure pointer component %qs with PASS at %L "
13831 "must have at least one argument",
13836 me_arg
= c
->ts
.interface
->formal
->sym
;
13839 /* Now check that the argument-type matches. */
13840 gcc_assert (me_arg
);
13841 if ((me_arg
->ts
.type
!= BT_DERIVED
&& me_arg
->ts
.type
!= BT_CLASS
)
13842 || (me_arg
->ts
.type
== BT_DERIVED
&& me_arg
->ts
.u
.derived
!= sym
)
13843 || (me_arg
->ts
.type
== BT_CLASS
13844 && CLASS_DATA (me_arg
)->ts
.u
.derived
!= sym
))
13846 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13847 " the derived type %qs", me_arg
->name
, c
->name
,
13848 me_arg
->name
, &c
->loc
, sym
->name
);
13853 /* Check for F03:C453. */
13854 if (CLASS_DATA (me_arg
)->attr
.dimension
)
13856 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13857 "must be scalar", me_arg
->name
, c
->name
, me_arg
->name
,
13863 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13865 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13866 "may not have the POINTER attribute", me_arg
->name
,
13867 c
->name
, me_arg
->name
, &c
->loc
);
13872 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13874 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13875 "may not be ALLOCATABLE", me_arg
->name
, c
->name
,
13876 me_arg
->name
, &c
->loc
);
13881 if (gfc_type_is_extensible (sym
) && me_arg
->ts
.type
!= BT_CLASS
)
13883 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13884 " at %L", c
->name
, &c
->loc
);
13890 /* Check type-spec if this is not the parent-type component. */
13891 if (((sym
->attr
.is_class
13892 && (!sym
->components
->ts
.u
.derived
->attr
.extension
13893 || c
!= sym
->components
->ts
.u
.derived
->components
))
13894 || (!sym
->attr
.is_class
13895 && (!sym
->attr
.extension
|| c
!= sym
->components
)))
13896 && !sym
->attr
.vtype
13897 && !resolve_typespec_used (&c
->ts
, &c
->loc
, c
->name
))
13900 super_type
= gfc_get_derived_super_type (sym
);
13902 /* If this type is an extension, set the accessibility of the parent
13905 && ((sym
->attr
.is_class
13906 && c
== sym
->components
->ts
.u
.derived
->components
)
13907 || (!sym
->attr
.is_class
&& c
== sym
->components
))
13908 && strcmp (super_type
->name
, c
->name
) == 0)
13909 c
->attr
.access
= super_type
->attr
.access
;
13911 /* If this type is an extension, see if this component has the same name
13912 as an inherited type-bound procedure. */
13913 if (super_type
&& !sym
->attr
.is_class
13914 && gfc_find_typebound_proc (super_type
, NULL
, c
->name
, true, NULL
))
13916 gfc_error ("Component %qs of %qs at %L has the same name as an"
13917 " inherited type-bound procedure",
13918 c
->name
, sym
->name
, &c
->loc
);
13922 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.proc_pointer
13923 && !c
->ts
.deferred
)
13925 if (c
->ts
.u
.cl
->length
== NULL
13926 || (!resolve_charlen(c
->ts
.u
.cl
))
13927 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
))
13929 gfc_error ("Character length of component %qs needs to "
13930 "be a constant specification expression at %L",
13932 c
->ts
.u
.cl
->length
? &c
->ts
.u
.cl
->length
->where
: &c
->loc
);
13937 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.deferred
13938 && !c
->attr
.pointer
&& !c
->attr
.allocatable
)
13940 gfc_error ("Character component %qs of %qs at %L with deferred "
13941 "length must be a POINTER or ALLOCATABLE",
13942 c
->name
, sym
->name
, &c
->loc
);
13946 /* Add the hidden deferred length field. */
13947 if (c
->ts
.type
== BT_CHARACTER
13948 && (c
->ts
.deferred
|| c
->attr
.pdt_string
)
13949 && !c
->attr
.function
13950 && !sym
->attr
.is_class
)
13952 char name
[GFC_MAX_SYMBOL_LEN
+9];
13953 gfc_component
*strlen
;
13954 sprintf (name
, "_%s_length", c
->name
);
13955 strlen
= gfc_find_component (sym
, name
, true, true, NULL
);
13956 if (strlen
== NULL
)
13958 if (!gfc_add_component (sym
, name
, &strlen
))
13960 strlen
->ts
.type
= BT_INTEGER
;
13961 strlen
->ts
.kind
= gfc_charlen_int_kind
;
13962 strlen
->attr
.access
= ACCESS_PRIVATE
;
13963 strlen
->attr
.artificial
= 1;
13967 if (c
->ts
.type
== BT_DERIVED
13968 && sym
->component_access
!= ACCESS_PRIVATE
13969 && gfc_check_symbol_access (sym
)
13970 && !is_sym_host_assoc (c
->ts
.u
.derived
, sym
->ns
)
13971 && !c
->ts
.u
.derived
->attr
.use_assoc
13972 && !gfc_check_symbol_access (c
->ts
.u
.derived
)
13973 && !gfc_notify_std (GFC_STD_F2003
, "the component %qs is a "
13974 "PRIVATE type and cannot be a component of "
13975 "%qs, which is PUBLIC at %L", c
->name
,
13976 sym
->name
, &sym
->declared_at
))
13979 if ((sym
->attr
.sequence
|| sym
->attr
.is_bind_c
) && c
->ts
.type
== BT_CLASS
)
13981 gfc_error ("Polymorphic component %s at %L in SEQUENCE or BIND(C) "
13982 "type %s", c
->name
, &c
->loc
, sym
->name
);
13986 if (sym
->attr
.sequence
)
13988 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.sequence
== 0)
13990 gfc_error ("Component %s of SEQUENCE type declared at %L does "
13991 "not have the SEQUENCE attribute",
13992 c
->ts
.u
.derived
->name
, &sym
->declared_at
);
13997 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.generic
)
13998 c
->ts
.u
.derived
= gfc_find_dt_in_generic (c
->ts
.u
.derived
);
13999 else if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
14000 && CLASS_DATA (c
)->ts
.u
.derived
->attr
.generic
)
14001 CLASS_DATA (c
)->ts
.u
.derived
14002 = gfc_find_dt_in_generic (CLASS_DATA (c
)->ts
.u
.derived
);
14004 if (!sym
->attr
.is_class
&& c
->ts
.type
== BT_DERIVED
&& !sym
->attr
.vtype
14005 && c
->attr
.pointer
&& c
->ts
.u
.derived
->components
== NULL
14006 && !c
->ts
.u
.derived
->attr
.zero_comp
)
14008 gfc_error ("The pointer component %qs of %qs at %L is a type "
14009 "that has not been declared", c
->name
, sym
->name
,
14014 if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
14015 && CLASS_DATA (c
)->attr
.class_pointer
14016 && CLASS_DATA (c
)->ts
.u
.derived
->components
== NULL
14017 && !CLASS_DATA (c
)->ts
.u
.derived
->attr
.zero_comp
14018 && !UNLIMITED_POLY (c
))
14020 gfc_error ("The pointer component %qs of %qs at %L is a type "
14021 "that has not been declared", c
->name
, sym
->name
,
14026 /* If an allocatable component derived type is of the same type as
14027 the enclosing derived type, we need a vtable generating so that
14028 the __deallocate procedure is created. */
14029 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
14030 && c
->ts
.u
.derived
== sym
&& c
->attr
.allocatable
== 1)
14031 gfc_find_vtab (&c
->ts
);
14033 /* Ensure that all the derived type components are put on the
14034 derived type list; even in formal namespaces, where derived type
14035 pointer components might not have been declared. */
14036 if (c
->ts
.type
== BT_DERIVED
14038 && c
->ts
.u
.derived
->components
14040 && sym
!= c
->ts
.u
.derived
)
14041 add_dt_to_dt_list (c
->ts
.u
.derived
);
14043 if (!gfc_resolve_array_spec (c
->as
,
14044 !(c
->attr
.pointer
|| c
->attr
.proc_pointer
14045 || c
->attr
.allocatable
)))
14048 if (c
->initializer
&& !sym
->attr
.vtype
14049 && !c
->attr
.pdt_kind
&& !c
->attr
.pdt_len
14050 && !gfc_check_assign_symbol (sym
, c
, c
->initializer
))
14057 /* Be nice about the locus for a structure expression - show the locus of the
14058 first non-null sub-expression if we can. */
14061 cons_where (gfc_expr
*struct_expr
)
14063 gfc_constructor
*cons
;
14065 gcc_assert (struct_expr
&& struct_expr
->expr_type
== EXPR_STRUCTURE
);
14067 cons
= gfc_constructor_first (struct_expr
->value
.constructor
);
14068 for (; cons
; cons
= gfc_constructor_next (cons
))
14070 if (cons
->expr
&& cons
->expr
->expr_type
!= EXPR_NULL
)
14071 return &cons
->expr
->where
;
14074 return &struct_expr
->where
;
14077 /* Resolve the components of a structure type. Much less work than derived
14081 resolve_fl_struct (gfc_symbol
*sym
)
14084 gfc_expr
*init
= NULL
;
14087 /* Make sure UNIONs do not have overlapping initializers. */
14088 if (sym
->attr
.flavor
== FL_UNION
)
14090 for (c
= sym
->components
; c
; c
= c
->next
)
14092 if (init
&& c
->initializer
)
14094 gfc_error ("Conflicting initializers in union at %L and %L",
14095 cons_where (init
), cons_where (c
->initializer
));
14096 gfc_free_expr (c
->initializer
);
14097 c
->initializer
= NULL
;
14100 init
= c
->initializer
;
14105 for (c
= sym
->components
; c
; c
= c
->next
)
14106 if (!resolve_component (c
, sym
))
14112 if (sym
->components
)
14113 add_dt_to_dt_list (sym
);
14119 /* Resolve the components of a derived type. This does not have to wait until
14120 resolution stage, but can be done as soon as the dt declaration has been
14124 resolve_fl_derived0 (gfc_symbol
*sym
)
14126 gfc_symbol
* super_type
;
14128 gfc_formal_arglist
*f
;
14131 if (sym
->attr
.unlimited_polymorphic
)
14134 super_type
= gfc_get_derived_super_type (sym
);
14137 if (super_type
&& sym
->attr
.coarray_comp
&& !super_type
->attr
.coarray_comp
)
14139 gfc_error ("As extending type %qs at %L has a coarray component, "
14140 "parent type %qs shall also have one", sym
->name
,
14141 &sym
->declared_at
, super_type
->name
);
14145 /* Ensure the extended type gets resolved before we do. */
14146 if (super_type
&& !resolve_fl_derived0 (super_type
))
14149 /* An ABSTRACT type must be extensible. */
14150 if (sym
->attr
.abstract
&& !gfc_type_is_extensible (sym
))
14152 gfc_error ("Non-extensible derived-type %qs at %L must not be ABSTRACT",
14153 sym
->name
, &sym
->declared_at
);
14157 c
= (sym
->attr
.is_class
) ? sym
->components
->ts
.u
.derived
->components
14161 for ( ; c
!= NULL
; c
= c
->next
)
14162 if (!resolve_component (c
, sym
))
14168 /* Now add the caf token field, where needed. */
14169 if (flag_coarray
!= GFC_FCOARRAY_NONE
14170 && !sym
->attr
.is_class
&& !sym
->attr
.vtype
)
14172 for (c
= sym
->components
; c
; c
= c
->next
)
14173 if (!c
->attr
.dimension
&& !c
->attr
.codimension
14174 && (c
->attr
.allocatable
|| c
->attr
.pointer
))
14176 char name
[GFC_MAX_SYMBOL_LEN
+9];
14177 gfc_component
*token
;
14178 sprintf (name
, "_caf_%s", c
->name
);
14179 token
= gfc_find_component (sym
, name
, true, true, NULL
);
14182 if (!gfc_add_component (sym
, name
, &token
))
14184 token
->ts
.type
= BT_VOID
;
14185 token
->ts
.kind
= gfc_default_integer_kind
;
14186 token
->attr
.access
= ACCESS_PRIVATE
;
14187 token
->attr
.artificial
= 1;
14188 token
->attr
.caf_token
= 1;
14193 check_defined_assignments (sym
);
14195 if (!sym
->attr
.defined_assign_comp
&& super_type
)
14196 sym
->attr
.defined_assign_comp
14197 = super_type
->attr
.defined_assign_comp
;
14199 /* If this is a non-ABSTRACT type extending an ABSTRACT one, ensure that
14200 all DEFERRED bindings are overridden. */
14201 if (super_type
&& super_type
->attr
.abstract
&& !sym
->attr
.abstract
14202 && !sym
->attr
.is_class
14203 && !ensure_not_abstract (sym
, super_type
))
14206 /* Check that there is a component for every PDT parameter. */
14207 if (sym
->attr
.pdt_template
)
14209 for (f
= sym
->formal
; f
; f
= f
->next
)
14213 c
= gfc_find_component (sym
, f
->sym
->name
, true, true, NULL
);
14216 gfc_error ("Parameterized type %qs does not have a component "
14217 "corresponding to parameter %qs at %L", sym
->name
,
14218 f
->sym
->name
, &sym
->declared_at
);
14224 /* Add derived type to the derived type list. */
14225 add_dt_to_dt_list (sym
);
14231 /* The following procedure does the full resolution of a derived type,
14232 including resolution of all type-bound procedures (if present). In contrast
14233 to 'resolve_fl_derived0' this can only be done after the module has been
14234 parsed completely. */
14237 resolve_fl_derived (gfc_symbol
*sym
)
14239 gfc_symbol
*gen_dt
= NULL
;
14241 if (sym
->attr
.unlimited_polymorphic
)
14244 if (!sym
->attr
.is_class
)
14245 gfc_find_symbol (sym
->name
, sym
->ns
, 0, &gen_dt
);
14246 if (gen_dt
&& gen_dt
->generic
&& gen_dt
->generic
->next
14247 && (!gen_dt
->generic
->sym
->attr
.use_assoc
14248 || gen_dt
->generic
->sym
->module
!= gen_dt
->generic
->next
->sym
->module
)
14249 && !gfc_notify_std (GFC_STD_F2003
, "Generic name %qs of function "
14250 "%qs at %L being the same name as derived "
14251 "type at %L", sym
->name
,
14252 gen_dt
->generic
->sym
== sym
14253 ? gen_dt
->generic
->next
->sym
->name
14254 : gen_dt
->generic
->sym
->name
,
14255 gen_dt
->generic
->sym
== sym
14256 ? &gen_dt
->generic
->next
->sym
->declared_at
14257 : &gen_dt
->generic
->sym
->declared_at
,
14258 &sym
->declared_at
))
14261 /* Resolve the finalizer procedures. */
14262 if (!gfc_resolve_finalizers (sym
, NULL
))
14265 if (sym
->attr
.is_class
&& sym
->ts
.u
.derived
== NULL
)
14267 /* Fix up incomplete CLASS symbols. */
14268 gfc_component
*data
= gfc_find_component (sym
, "_data", true, true, NULL
);
14269 gfc_component
*vptr
= gfc_find_component (sym
, "_vptr", true, true, NULL
);
14271 /* Nothing more to do for unlimited polymorphic entities. */
14272 if (data
->ts
.u
.derived
->attr
.unlimited_polymorphic
)
14274 else if (vptr
->ts
.u
.derived
== NULL
)
14276 gfc_symbol
*vtab
= gfc_find_derived_vtab (data
->ts
.u
.derived
);
14278 vptr
->ts
.u
.derived
= vtab
->ts
.u
.derived
;
14279 if (!resolve_fl_derived0 (vptr
->ts
.u
.derived
))
14284 if (!resolve_fl_derived0 (sym
))
14287 /* Resolve the type-bound procedures. */
14288 if (!resolve_typebound_procedures (sym
))
14291 /* Generate module vtables subject to their accessibility and their not
14292 being vtables or pdt templates. If this is not done class declarations
14293 in external procedures wind up with their own version and so SELECT TYPE
14294 fails because the vptrs do not have the same address. */
14295 if (gfc_option
.allow_std
& GFC_STD_F2003
14296 && sym
->ns
->proc_name
14297 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14298 && sym
->attr
.access
!= ACCESS_PRIVATE
14299 && !(sym
->attr
.use_assoc
|| sym
->attr
.vtype
|| sym
->attr
.pdt_template
))
14301 gfc_symbol
*vtab
= gfc_find_derived_vtab (sym
);
14302 gfc_set_sym_referenced (vtab
);
14310 resolve_fl_namelist (gfc_symbol
*sym
)
14315 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14317 /* Check again, the check in match only works if NAMELIST comes
14319 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SIZE
)
14321 gfc_error ("Assumed size array %qs in namelist %qs at %L is not "
14322 "allowed", nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14326 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SHAPE
14327 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14328 "with assumed shape in namelist %qs at %L",
14329 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14332 if (is_non_constant_shape_array (nl
->sym
)
14333 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14334 "with nonconstant shape in namelist %qs at %L",
14335 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14338 if (nl
->sym
->ts
.type
== BT_CHARACTER
14339 && (nl
->sym
->ts
.u
.cl
->length
== NULL
14340 || !gfc_is_constant_expr (nl
->sym
->ts
.u
.cl
->length
))
14341 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs with "
14342 "nonconstant character length in "
14343 "namelist %qs at %L", nl
->sym
->name
,
14344 sym
->name
, &sym
->declared_at
))
14349 /* Reject PRIVATE objects in a PUBLIC namelist. */
14350 if (gfc_check_symbol_access (sym
))
14352 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14354 if (!nl
->sym
->attr
.use_assoc
14355 && !is_sym_host_assoc (nl
->sym
, sym
->ns
)
14356 && !gfc_check_symbol_access (nl
->sym
))
14358 gfc_error ("NAMELIST object %qs was declared PRIVATE and "
14359 "cannot be member of PUBLIC namelist %qs at %L",
14360 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14364 if (nl
->sym
->ts
.type
== BT_DERIVED
14365 && (nl
->sym
->ts
.u
.derived
->attr
.alloc_comp
14366 || nl
->sym
->ts
.u
.derived
->attr
.pointer_comp
))
14368 if (!gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs in "
14369 "namelist %qs at %L with ALLOCATABLE "
14370 "or POINTER components", nl
->sym
->name
,
14371 sym
->name
, &sym
->declared_at
))
14376 /* Types with private components that came here by USE-association. */
14377 if (nl
->sym
->ts
.type
== BT_DERIVED
14378 && derived_inaccessible (nl
->sym
->ts
.u
.derived
))
14380 gfc_error ("NAMELIST object %qs has use-associated PRIVATE "
14381 "components and cannot be member of namelist %qs at %L",
14382 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14386 /* Types with private components that are defined in the same module. */
14387 if (nl
->sym
->ts
.type
== BT_DERIVED
14388 && !is_sym_host_assoc (nl
->sym
->ts
.u
.derived
, sym
->ns
)
14389 && nl
->sym
->ts
.u
.derived
->attr
.private_comp
)
14391 gfc_error ("NAMELIST object %qs has PRIVATE components and "
14392 "cannot be a member of PUBLIC namelist %qs at %L",
14393 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14400 /* 14.1.2 A module or internal procedure represent local entities
14401 of the same type as a namelist member and so are not allowed. */
14402 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14404 if (nl
->sym
->ts
.kind
!= 0 && nl
->sym
->attr
.flavor
== FL_VARIABLE
)
14407 if (nl
->sym
->attr
.function
&& nl
->sym
== nl
->sym
->result
)
14408 if ((nl
->sym
== sym
->ns
->proc_name
)
14410 (sym
->ns
->parent
&& nl
->sym
== sym
->ns
->parent
->proc_name
))
14415 gfc_find_symbol (nl
->sym
->name
, sym
->ns
, 1, &nlsym
);
14416 if (nlsym
&& nlsym
->attr
.flavor
== FL_PROCEDURE
)
14418 gfc_error ("PROCEDURE attribute conflicts with NAMELIST "
14419 "attribute in %qs at %L", nlsym
->name
,
14420 &sym
->declared_at
);
14427 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14428 nl
->sym
->attr
.asynchronous
= 1;
14435 resolve_fl_parameter (gfc_symbol
*sym
)
14437 /* A parameter array's shape needs to be constant. */
14438 if (sym
->as
!= NULL
14439 && (sym
->as
->type
== AS_DEFERRED
14440 || is_non_constant_shape_array (sym
)))
14442 gfc_error ("Parameter array %qs at %L cannot be automatic "
14443 "or of deferred shape", sym
->name
, &sym
->declared_at
);
14447 /* Constraints on deferred type parameter. */
14448 if (!deferred_requirements (sym
))
14451 /* Make sure a parameter that has been implicitly typed still
14452 matches the implicit type, since PARAMETER statements can precede
14453 IMPLICIT statements. */
14454 if (sym
->attr
.implicit_type
14455 && !gfc_compare_types (&sym
->ts
, gfc_get_default_type (sym
->name
,
14458 gfc_error ("Implicitly typed PARAMETER %qs at %L doesn't match a "
14459 "later IMPLICIT type", sym
->name
, &sym
->declared_at
);
14463 /* Make sure the types of derived parameters are consistent. This
14464 type checking is deferred until resolution because the type may
14465 refer to a derived type from the host. */
14466 if (sym
->ts
.type
== BT_DERIVED
14467 && !gfc_compare_types (&sym
->ts
, &sym
->value
->ts
))
14469 gfc_error ("Incompatible derived type in PARAMETER at %L",
14470 &sym
->value
->where
);
14474 /* F03:C509,C514. */
14475 if (sym
->ts
.type
== BT_CLASS
)
14477 gfc_error ("CLASS variable %qs at %L cannot have the PARAMETER attribute",
14478 sym
->name
, &sym
->declared_at
);
14486 /* Called by resolve_symbol to check PDTs. */
14489 resolve_pdt (gfc_symbol
* sym
)
14491 gfc_symbol
*derived
= NULL
;
14492 gfc_actual_arglist
*param
;
14494 bool const_len_exprs
= true;
14495 bool assumed_len_exprs
= false;
14496 symbol_attribute
*attr
;
14498 if (sym
->ts
.type
== BT_DERIVED
)
14500 derived
= sym
->ts
.u
.derived
;
14501 attr
= &(sym
->attr
);
14503 else if (sym
->ts
.type
== BT_CLASS
)
14505 derived
= CLASS_DATA (sym
)->ts
.u
.derived
;
14506 attr
= &(CLASS_DATA (sym
)->attr
);
14509 gcc_unreachable ();
14511 gcc_assert (derived
->attr
.pdt_type
);
14513 for (param
= sym
->param_list
; param
; param
= param
->next
)
14515 c
= gfc_find_component (derived
, param
->name
, false, true, NULL
);
14517 if (c
->attr
.pdt_kind
)
14520 if (param
->expr
&& !gfc_is_constant_expr (param
->expr
)
14521 && c
->attr
.pdt_len
)
14522 const_len_exprs
= false;
14523 else if (param
->spec_type
== SPEC_ASSUMED
)
14524 assumed_len_exprs
= true;
14526 if (param
->spec_type
== SPEC_DEFERRED
14527 && !attr
->allocatable
&& !attr
->pointer
)
14528 gfc_error ("The object %qs at %L has a deferred LEN "
14529 "parameter %qs and is neither allocatable "
14530 "nor a pointer", sym
->name
, &sym
->declared_at
,
14535 if (!const_len_exprs
14536 && (sym
->ns
->proc_name
->attr
.is_main_program
14537 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14538 || sym
->attr
.save
!= SAVE_NONE
))
14539 gfc_error ("The AUTOMATIC object %qs at %L must not have the "
14540 "SAVE attribute or be a variable declared in the "
14541 "main program, a module or a submodule(F08/C513)",
14542 sym
->name
, &sym
->declared_at
);
14544 if (assumed_len_exprs
&& !(sym
->attr
.dummy
14545 || sym
->attr
.select_type_temporary
|| sym
->attr
.associate_var
))
14546 gfc_error ("The object %qs at %L with ASSUMED type parameters "
14547 "must be a dummy or a SELECT TYPE selector(F08/4.2)",
14548 sym
->name
, &sym
->declared_at
);
14552 /* Do anything necessary to resolve a symbol. Right now, we just
14553 assume that an otherwise unknown symbol is a variable. This sort
14554 of thing commonly happens for symbols in module. */
14557 resolve_symbol (gfc_symbol
*sym
)
14559 int check_constant
, mp_flag
;
14560 gfc_symtree
*symtree
;
14561 gfc_symtree
*this_symtree
;
14564 symbol_attribute class_attr
;
14565 gfc_array_spec
*as
;
14566 bool saved_specification_expr
;
14572 /* No symbol will ever have union type; only components can be unions.
14573 Union type declaration symbols have type BT_UNKNOWN but flavor FL_UNION
14574 (just like derived type declaration symbols have flavor FL_DERIVED). */
14575 gcc_assert (sym
->ts
.type
!= BT_UNION
);
14577 /* Coarrayed polymorphic objects with allocatable or pointer components are
14578 yet unsupported for -fcoarray=lib. */
14579 if (flag_coarray
== GFC_FCOARRAY_LIB
&& sym
->ts
.type
== BT_CLASS
14580 && sym
->ts
.u
.derived
&& CLASS_DATA (sym
)
14581 && CLASS_DATA (sym
)->attr
.codimension
14582 && (CLASS_DATA (sym
)->ts
.u
.derived
->attr
.alloc_comp
14583 || CLASS_DATA (sym
)->ts
.u
.derived
->attr
.pointer_comp
))
14585 gfc_error ("Sorry, allocatable/pointer components in polymorphic (CLASS) "
14586 "type coarrays at %L are unsupported", &sym
->declared_at
);
14590 if (sym
->attr
.artificial
)
14593 if (sym
->attr
.unlimited_polymorphic
)
14596 if (sym
->attr
.flavor
== FL_UNKNOWN
14597 || (sym
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.intrinsic
14598 && !sym
->attr
.generic
&& !sym
->attr
.external
14599 && sym
->attr
.if_source
== IFSRC_UNKNOWN
14600 && sym
->ts
.type
== BT_UNKNOWN
))
14603 /* If we find that a flavorless symbol is an interface in one of the
14604 parent namespaces, find its symtree in this namespace, free the
14605 symbol and set the symtree to point to the interface symbol. */
14606 for (ns
= gfc_current_ns
->parent
; ns
; ns
= ns
->parent
)
14608 symtree
= gfc_find_symtree (ns
->sym_root
, sym
->name
);
14609 if (symtree
&& (symtree
->n
.sym
->generic
||
14610 (symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
14611 && sym
->ns
->construct_entities
)))
14613 this_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
14615 if (this_symtree
->n
.sym
== sym
)
14617 symtree
->n
.sym
->refs
++;
14618 gfc_release_symbol (sym
);
14619 this_symtree
->n
.sym
= symtree
->n
.sym
;
14625 /* Otherwise give it a flavor according to such attributes as
14627 if (sym
->attr
.flavor
== FL_UNKNOWN
&& sym
->attr
.external
== 0
14628 && sym
->attr
.intrinsic
== 0)
14629 sym
->attr
.flavor
= FL_VARIABLE
;
14630 else if (sym
->attr
.flavor
== FL_UNKNOWN
)
14632 sym
->attr
.flavor
= FL_PROCEDURE
;
14633 if (sym
->attr
.dimension
)
14634 sym
->attr
.function
= 1;
14638 if (sym
->attr
.external
&& sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.function
)
14639 gfc_add_function (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14641 if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
14642 && !resolve_procedure_interface (sym
))
14645 if (sym
->attr
.is_protected
&& !sym
->attr
.proc_pointer
14646 && (sym
->attr
.procedure
|| sym
->attr
.external
))
14648 if (sym
->attr
.external
)
14649 gfc_error ("PROTECTED attribute conflicts with EXTERNAL attribute "
14650 "at %L", &sym
->declared_at
);
14652 gfc_error ("PROCEDURE attribute conflicts with PROTECTED attribute "
14653 "at %L", &sym
->declared_at
);
14658 if (sym
->attr
.flavor
== FL_DERIVED
&& !resolve_fl_derived (sym
))
14661 else if ((sym
->attr
.flavor
== FL_STRUCT
|| sym
->attr
.flavor
== FL_UNION
)
14662 && !resolve_fl_struct (sym
))
14665 /* Symbols that are module procedures with results (functions) have
14666 the types and array specification copied for type checking in
14667 procedures that call them, as well as for saving to a module
14668 file. These symbols can't stand the scrutiny that their results
14670 mp_flag
= (sym
->result
!= NULL
&& sym
->result
!= sym
);
14672 /* Make sure that the intrinsic is consistent with its internal
14673 representation. This needs to be done before assigning a default
14674 type to avoid spurious warnings. */
14675 if (sym
->attr
.flavor
!= FL_MODULE
&& sym
->attr
.intrinsic
14676 && !gfc_resolve_intrinsic (sym
, &sym
->declared_at
))
14679 /* Resolve associate names. */
14681 resolve_assoc_var (sym
, true);
14683 /* Assign default type to symbols that need one and don't have one. */
14684 if (sym
->ts
.type
== BT_UNKNOWN
)
14686 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
)
14688 gfc_set_default_type (sym
, 1, NULL
);
14691 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.external
14692 && !sym
->attr
.function
&& !sym
->attr
.subroutine
14693 && gfc_get_default_type (sym
->name
, sym
->ns
)->type
== BT_UNKNOWN
)
14694 gfc_add_subroutine (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14696 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14698 /* The specific case of an external procedure should emit an error
14699 in the case that there is no implicit type. */
14702 if (!sym
->attr
.mixed_entry_master
)
14703 gfc_set_default_type (sym
, sym
->attr
.external
, NULL
);
14707 /* Result may be in another namespace. */
14708 resolve_symbol (sym
->result
);
14710 if (!sym
->result
->attr
.proc_pointer
)
14712 sym
->ts
= sym
->result
->ts
;
14713 sym
->as
= gfc_copy_array_spec (sym
->result
->as
);
14714 sym
->attr
.dimension
= sym
->result
->attr
.dimension
;
14715 sym
->attr
.pointer
= sym
->result
->attr
.pointer
;
14716 sym
->attr
.allocatable
= sym
->result
->attr
.allocatable
;
14717 sym
->attr
.contiguous
= sym
->result
->attr
.contiguous
;
14722 else if (mp_flag
&& sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14724 bool saved_specification_expr
= specification_expr
;
14725 specification_expr
= true;
14726 gfc_resolve_array_spec (sym
->result
->as
, false);
14727 specification_expr
= saved_specification_expr
;
14730 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
14732 as
= CLASS_DATA (sym
)->as
;
14733 class_attr
= CLASS_DATA (sym
)->attr
;
14734 class_attr
.pointer
= class_attr
.class_pointer
;
14738 class_attr
= sym
->attr
;
14743 if (sym
->attr
.contiguous
14744 && (!class_attr
.dimension
14745 || (as
->type
!= AS_ASSUMED_SHAPE
&& as
->type
!= AS_ASSUMED_RANK
14746 && !class_attr
.pointer
)))
14748 gfc_error ("%qs at %L has the CONTIGUOUS attribute but is not an "
14749 "array pointer or an assumed-shape or assumed-rank array",
14750 sym
->name
, &sym
->declared_at
);
14754 /* Assumed size arrays and assumed shape arrays must be dummy
14755 arguments. Array-spec's of implied-shape should have been resolved to
14756 AS_EXPLICIT already. */
14760 /* If AS_IMPLIED_SHAPE makes it to here, it must be a bad
14761 specification expression. */
14762 if (as
->type
== AS_IMPLIED_SHAPE
)
14765 for (i
=0; i
<as
->rank
; i
++)
14767 if (as
->lower
[i
] != NULL
&& as
->upper
[i
] == NULL
)
14769 gfc_error ("Bad specification for assumed size array at %L",
14770 &as
->lower
[i
]->where
);
14777 if (((as
->type
== AS_ASSUMED_SIZE
&& !as
->cp_was_assumed
)
14778 || as
->type
== AS_ASSUMED_SHAPE
)
14779 && !sym
->attr
.dummy
&& !sym
->attr
.select_type_temporary
)
14781 if (as
->type
== AS_ASSUMED_SIZE
)
14782 gfc_error ("Assumed size array at %L must be a dummy argument",
14783 &sym
->declared_at
);
14785 gfc_error ("Assumed shape array at %L must be a dummy argument",
14786 &sym
->declared_at
);
14789 /* TS 29113, C535a. */
14790 if (as
->type
== AS_ASSUMED_RANK
&& !sym
->attr
.dummy
14791 && !sym
->attr
.select_type_temporary
)
14793 gfc_error ("Assumed-rank array at %L must be a dummy argument",
14794 &sym
->declared_at
);
14797 if (as
->type
== AS_ASSUMED_RANK
14798 && (sym
->attr
.codimension
|| sym
->attr
.value
))
14800 gfc_error ("Assumed-rank array at %L may not have the VALUE or "
14801 "CODIMENSION attribute", &sym
->declared_at
);
14806 /* Make sure symbols with known intent or optional are really dummy
14807 variable. Because of ENTRY statement, this has to be deferred
14808 until resolution time. */
14810 if (!sym
->attr
.dummy
14811 && (sym
->attr
.optional
|| sym
->attr
.intent
!= INTENT_UNKNOWN
))
14813 gfc_error ("Symbol at %L is not a DUMMY variable", &sym
->declared_at
);
14817 if (sym
->attr
.value
&& !sym
->attr
.dummy
)
14819 gfc_error ("%qs at %L cannot have the VALUE attribute because "
14820 "it is not a dummy argument", sym
->name
, &sym
->declared_at
);
14824 if (sym
->attr
.value
&& sym
->ts
.type
== BT_CHARACTER
)
14826 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
14827 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
14829 gfc_error ("Character dummy variable %qs at %L with VALUE "
14830 "attribute must have constant length",
14831 sym
->name
, &sym
->declared_at
);
14835 if (sym
->ts
.is_c_interop
14836 && mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
14838 gfc_error ("C interoperable character dummy variable %qs at %L "
14839 "with VALUE attribute must have length one",
14840 sym
->name
, &sym
->declared_at
);
14845 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
14846 && sym
->ts
.u
.derived
->attr
.generic
)
14848 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
14849 if (!sym
->ts
.u
.derived
)
14851 gfc_error ("The derived type %qs at %L is of type %qs, "
14852 "which has not been defined", sym
->name
,
14853 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
14854 sym
->ts
.type
= BT_UNKNOWN
;
14859 /* Use the same constraints as TYPE(*), except for the type check
14860 and that only scalars and assumed-size arrays are permitted. */
14861 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
14863 if (!sym
->attr
.dummy
)
14865 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14866 "a dummy argument", sym
->name
, &sym
->declared_at
);
14870 if (sym
->ts
.type
!= BT_ASSUMED
&& sym
->ts
.type
!= BT_INTEGER
14871 && sym
->ts
.type
!= BT_REAL
&& sym
->ts
.type
!= BT_LOGICAL
14872 && sym
->ts
.type
!= BT_COMPLEX
)
14874 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14875 "of type TYPE(*) or of an numeric intrinsic type",
14876 sym
->name
, &sym
->declared_at
);
14880 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
14881 || sym
->attr
.pointer
|| sym
->attr
.value
)
14883 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
14884 "have the ALLOCATABLE, CODIMENSION, POINTER or VALUE "
14885 "attribute", sym
->name
, &sym
->declared_at
);
14889 if (sym
->attr
.intent
== INTENT_OUT
)
14891 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
14892 "have the INTENT(OUT) attribute",
14893 sym
->name
, &sym
->declared_at
);
14896 if (sym
->attr
.dimension
&& sym
->as
->type
!= AS_ASSUMED_SIZE
)
14898 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall "
14899 "either be a scalar or an assumed-size array",
14900 sym
->name
, &sym
->declared_at
);
14904 /* Set the type to TYPE(*) and add a dimension(*) to ensure
14905 NO_ARG_CHECK is correctly handled in trans*.c, e.g. with
14907 sym
->ts
.type
= BT_ASSUMED
;
14908 sym
->as
= gfc_get_array_spec ();
14909 sym
->as
->type
= AS_ASSUMED_SIZE
;
14911 sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
14913 else if (sym
->ts
.type
== BT_ASSUMED
)
14915 /* TS 29113, C407a. */
14916 if (!sym
->attr
.dummy
)
14918 gfc_error ("Assumed type of variable %s at %L is only permitted "
14919 "for dummy variables", sym
->name
, &sym
->declared_at
);
14922 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
14923 || sym
->attr
.pointer
|| sym
->attr
.value
)
14925 gfc_error ("Assumed-type variable %s at %L may not have the "
14926 "ALLOCATABLE, CODIMENSION, POINTER or VALUE attribute",
14927 sym
->name
, &sym
->declared_at
);
14930 if (sym
->attr
.intent
== INTENT_OUT
)
14932 gfc_error ("Assumed-type variable %s at %L may not have the "
14933 "INTENT(OUT) attribute",
14934 sym
->name
, &sym
->declared_at
);
14937 if (sym
->attr
.dimension
&& sym
->as
->type
== AS_EXPLICIT
)
14939 gfc_error ("Assumed-type variable %s at %L shall not be an "
14940 "explicit-shape array", sym
->name
, &sym
->declared_at
);
14945 /* If the symbol is marked as bind(c), that it is declared at module level
14946 scope and verify its type and kind. Do not do the latter for symbols
14947 that are implicitly typed because that is handled in
14948 gfc_set_default_type. Handle dummy arguments and procedure definitions
14949 separately. Also, anything that is use associated is not handled here
14950 but instead is handled in the module it is declared in. Finally, derived
14951 type definitions are allowed to be BIND(C) since that only implies that
14952 they're interoperable, and they are checked fully for interoperability
14953 when a variable is declared of that type. */
14954 if (sym
->attr
.is_bind_c
&& sym
->attr
.use_assoc
== 0
14955 && sym
->attr
.dummy
== 0 && sym
->attr
.flavor
!= FL_PROCEDURE
14956 && sym
->attr
.flavor
!= FL_DERIVED
)
14960 /* First, make sure the variable is declared at the
14961 module-level scope (J3/04-007, Section 15.3). */
14962 if (sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
&&
14963 sym
->attr
.in_common
== 0)
14965 gfc_error ("Variable %qs at %L cannot be BIND(C) because it "
14966 "is neither a COMMON block nor declared at the "
14967 "module level scope", sym
->name
, &(sym
->declared_at
));
14970 else if (sym
->ts
.type
== BT_CHARACTER
14971 && (sym
->ts
.u
.cl
== NULL
|| sym
->ts
.u
.cl
->length
== NULL
14972 || !gfc_is_constant_expr (sym
->ts
.u
.cl
->length
)
14973 || mpz_cmp_si (sym
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
14975 gfc_error ("BIND(C) Variable %qs at %L must have length one",
14976 sym
->name
, &sym
->declared_at
);
14979 else if (sym
->common_head
!= NULL
&& sym
->attr
.implicit_type
== 0)
14981 t
= verify_com_block_vars_c_interop (sym
->common_head
);
14983 else if (sym
->attr
.implicit_type
== 0)
14985 /* If type() declaration, we need to verify that the components
14986 of the given type are all C interoperable, etc. */
14987 if (sym
->ts
.type
== BT_DERIVED
&&
14988 sym
->ts
.u
.derived
->attr
.is_c_interop
!= 1)
14990 /* Make sure the user marked the derived type as BIND(C). If
14991 not, call the verify routine. This could print an error
14992 for the derived type more than once if multiple variables
14993 of that type are declared. */
14994 if (sym
->ts
.u
.derived
->attr
.is_bind_c
!= 1)
14995 verify_bind_c_derived_type (sym
->ts
.u
.derived
);
14999 /* Verify the variable itself as C interoperable if it
15000 is BIND(C). It is not possible for this to succeed if
15001 the verify_bind_c_derived_type failed, so don't have to handle
15002 any error returned by verify_bind_c_derived_type. */
15003 t
= verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
15004 sym
->common_block
);
15009 /* clear the is_bind_c flag to prevent reporting errors more than
15010 once if something failed. */
15011 sym
->attr
.is_bind_c
= 0;
15016 /* If a derived type symbol has reached this point, without its
15017 type being declared, we have an error. Notice that most
15018 conditions that produce undefined derived types have already
15019 been dealt with. However, the likes of:
15020 implicit type(t) (t) ..... call foo (t) will get us here if
15021 the type is not declared in the scope of the implicit
15022 statement. Change the type to BT_UNKNOWN, both because it is so
15023 and to prevent an ICE. */
15024 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15025 && sym
->ts
.u
.derived
->components
== NULL
15026 && !sym
->ts
.u
.derived
->attr
.zero_comp
)
15028 gfc_error ("The derived type %qs at %L is of type %qs, "
15029 "which has not been defined", sym
->name
,
15030 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15031 sym
->ts
.type
= BT_UNKNOWN
;
15035 /* Make sure that the derived type has been resolved and that the
15036 derived type is visible in the symbol's namespace, if it is a
15037 module function and is not PRIVATE. */
15038 if (sym
->ts
.type
== BT_DERIVED
15039 && sym
->ts
.u
.derived
->attr
.use_assoc
15040 && sym
->ns
->proc_name
15041 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15042 && !resolve_fl_derived (sym
->ts
.u
.derived
))
15045 /* Unless the derived-type declaration is use associated, Fortran 95
15046 does not allow public entries of private derived types.
15047 See 4.4.1 (F95) and 4.5.1.1 (F2003); and related interpretation
15048 161 in 95-006r3. */
15049 if (sym
->ts
.type
== BT_DERIVED
15050 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15051 && !sym
->ts
.u
.derived
->attr
.use_assoc
15052 && gfc_check_symbol_access (sym
)
15053 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
15054 && !gfc_notify_std (GFC_STD_F2003
, "PUBLIC %s %qs at %L of PRIVATE "
15055 "derived type %qs",
15056 (sym
->attr
.flavor
== FL_PARAMETER
)
15057 ? "parameter" : "variable",
15058 sym
->name
, &sym
->declared_at
,
15059 sym
->ts
.u
.derived
->name
))
15062 /* F2008, C1302. */
15063 if (sym
->ts
.type
== BT_DERIVED
15064 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15065 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
15066 || sym
->ts
.u
.derived
->attr
.lock_comp
)
15067 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15069 gfc_error ("Variable %s at %L of type LOCK_TYPE or with subcomponent of "
15070 "type LOCK_TYPE must be a coarray", sym
->name
,
15071 &sym
->declared_at
);
15075 /* TS18508, C702/C703. */
15076 if (sym
->ts
.type
== BT_DERIVED
15077 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15078 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
15079 || sym
->ts
.u
.derived
->attr
.event_comp
)
15080 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15082 gfc_error ("Variable %s at %L of type EVENT_TYPE or with subcomponent of "
15083 "type EVENT_TYPE must be a coarray", sym
->name
,
15084 &sym
->declared_at
);
15088 /* An assumed-size array with INTENT(OUT) shall not be of a type for which
15089 default initialization is defined (5.1.2.4.4). */
15090 if (sym
->ts
.type
== BT_DERIVED
15092 && sym
->attr
.intent
== INTENT_OUT
15094 && sym
->as
->type
== AS_ASSUMED_SIZE
)
15096 for (c
= sym
->ts
.u
.derived
->components
; c
; c
= c
->next
)
15098 if (c
->initializer
)
15100 gfc_error ("The INTENT(OUT) dummy argument %qs at %L is "
15101 "ASSUMED SIZE and so cannot have a default initializer",
15102 sym
->name
, &sym
->declared_at
);
15109 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15110 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.lock_comp
)
15112 gfc_error ("Dummy argument %qs at %L of LOCK_TYPE shall not be "
15113 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15118 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15119 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.event_comp
)
15121 gfc_error ("Dummy argument %qs at %L of EVENT_TYPE shall not be "
15122 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15127 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15128 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15129 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15130 || class_attr
.codimension
)
15131 && (sym
->attr
.result
|| sym
->result
== sym
))
15133 gfc_error ("Function result %qs at %L shall not be a coarray or have "
15134 "a coarray component", sym
->name
, &sym
->declared_at
);
15139 if (sym
->attr
.codimension
&& sym
->ts
.type
== BT_DERIVED
15140 && sym
->ts
.u
.derived
->ts
.is_iso_c
)
15142 gfc_error ("Variable %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
15143 "shall not be a coarray", sym
->name
, &sym
->declared_at
);
15148 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15149 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15150 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15151 && (class_attr
.codimension
|| class_attr
.pointer
|| class_attr
.dimension
15152 || class_attr
.allocatable
))
15154 gfc_error ("Variable %qs at %L with coarray component shall be a "
15155 "nonpointer, nonallocatable scalar, which is not a coarray",
15156 sym
->name
, &sym
->declared_at
);
15160 /* F2008, C526. The function-result case was handled above. */
15161 if (class_attr
.codimension
15162 && !(class_attr
.allocatable
|| sym
->attr
.dummy
|| sym
->attr
.save
15163 || sym
->attr
.select_type_temporary
15164 || sym
->attr
.associate_var
15165 || (sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15166 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15167 || sym
->ns
->proc_name
->attr
.is_main_program
15168 || sym
->attr
.function
|| sym
->attr
.result
|| sym
->attr
.use_assoc
))
15170 gfc_error ("Variable %qs at %L is a coarray and is not ALLOCATABLE, SAVE "
15171 "nor a dummy argument", sym
->name
, &sym
->declared_at
);
15175 else if (class_attr
.codimension
&& !sym
->attr
.select_type_temporary
15176 && !class_attr
.allocatable
&& as
&& as
->cotype
== AS_DEFERRED
)
15178 gfc_error ("Coarray variable %qs at %L shall not have codimensions with "
15179 "deferred shape", sym
->name
, &sym
->declared_at
);
15182 else if (class_attr
.codimension
&& class_attr
.allocatable
&& as
15183 && (as
->cotype
!= AS_DEFERRED
|| as
->type
!= AS_DEFERRED
))
15185 gfc_error ("Allocatable coarray variable %qs at %L must have "
15186 "deferred shape", sym
->name
, &sym
->declared_at
);
15191 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15192 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15193 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15194 || (class_attr
.codimension
&& class_attr
.allocatable
))
15195 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
)
15197 gfc_error ("Variable %qs at %L is INTENT(OUT) and can thus not be an "
15198 "allocatable coarray or have coarray components",
15199 sym
->name
, &sym
->declared_at
);
15203 if (class_attr
.codimension
&& sym
->attr
.dummy
15204 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.is_bind_c
)
15206 gfc_error ("Coarray dummy variable %qs at %L not allowed in BIND(C) "
15207 "procedure %qs", sym
->name
, &sym
->declared_at
,
15208 sym
->ns
->proc_name
->name
);
15212 if (sym
->ts
.type
== BT_LOGICAL
15213 && ((sym
->attr
.function
&& sym
->attr
.is_bind_c
&& sym
->result
== sym
)
15214 || ((sym
->attr
.dummy
|| sym
->attr
.result
) && sym
->ns
->proc_name
15215 && sym
->ns
->proc_name
->attr
.is_bind_c
)))
15218 for (i
= 0; gfc_logical_kinds
[i
].kind
; i
++)
15219 if (gfc_logical_kinds
[i
].kind
== sym
->ts
.kind
)
15221 if (!gfc_logical_kinds
[i
].c_bool
&& sym
->attr
.dummy
15222 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL dummy argument %qs at "
15223 "%L with non-C_Bool kind in BIND(C) procedure "
15224 "%qs", sym
->name
, &sym
->declared_at
,
15225 sym
->ns
->proc_name
->name
))
15227 else if (!gfc_logical_kinds
[i
].c_bool
15228 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL result variable "
15229 "%qs at %L with non-C_Bool kind in "
15230 "BIND(C) procedure %qs", sym
->name
,
15232 sym
->attr
.function
? sym
->name
15233 : sym
->ns
->proc_name
->name
))
15237 switch (sym
->attr
.flavor
)
15240 if (!resolve_fl_variable (sym
, mp_flag
))
15245 if (sym
->formal
&& !sym
->formal_ns
)
15247 /* Check that none of the arguments are a namelist. */
15248 gfc_formal_arglist
*formal
= sym
->formal
;
15250 for (; formal
; formal
= formal
->next
)
15251 if (formal
->sym
&& formal
->sym
->attr
.flavor
== FL_NAMELIST
)
15253 gfc_error ("Namelist %qs can not be an argument to "
15254 "subroutine or function at %L",
15255 formal
->sym
->name
, &sym
->declared_at
);
15260 if (!resolve_fl_procedure (sym
, mp_flag
))
15265 if (!resolve_fl_namelist (sym
))
15270 if (!resolve_fl_parameter (sym
))
15278 /* Resolve array specifier. Check as well some constraints
15279 on COMMON blocks. */
15281 check_constant
= sym
->attr
.in_common
&& !sym
->attr
.pointer
;
15283 /* Set the formal_arg_flag so that check_conflict will not throw
15284 an error for host associated variables in the specification
15285 expression for an array_valued function. */
15286 if (sym
->attr
.function
&& sym
->as
)
15287 formal_arg_flag
= true;
15289 saved_specification_expr
= specification_expr
;
15290 specification_expr
= true;
15291 gfc_resolve_array_spec (sym
->as
, check_constant
);
15292 specification_expr
= saved_specification_expr
;
15294 formal_arg_flag
= false;
15296 /* Resolve formal namespaces. */
15297 if (sym
->formal_ns
&& sym
->formal_ns
!= gfc_current_ns
15298 && !sym
->attr
.contained
&& !sym
->attr
.intrinsic
)
15299 gfc_resolve (sym
->formal_ns
);
15301 /* Make sure the formal namespace is present. */
15302 if (sym
->formal
&& !sym
->formal_ns
)
15304 gfc_formal_arglist
*formal
= sym
->formal
;
15305 while (formal
&& !formal
->sym
)
15306 formal
= formal
->next
;
15310 sym
->formal_ns
= formal
->sym
->ns
;
15311 if (sym
->ns
!= formal
->sym
->ns
)
15312 sym
->formal_ns
->refs
++;
15316 /* Check threadprivate restrictions. */
15317 if (sym
->attr
.threadprivate
&& !sym
->attr
.save
15318 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15319 && (!sym
->attr
.in_common
15320 && sym
->module
== NULL
15321 && (sym
->ns
->proc_name
== NULL
15322 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15323 gfc_error ("Threadprivate at %L isn't SAVEd", &sym
->declared_at
);
15325 /* Check omp declare target restrictions. */
15326 if (sym
->attr
.omp_declare_target
15327 && sym
->attr
.flavor
== FL_VARIABLE
15329 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15330 && (!sym
->attr
.in_common
15331 && sym
->module
== NULL
15332 && (sym
->ns
->proc_name
== NULL
15333 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15334 gfc_error ("!$OMP DECLARE TARGET variable %qs at %L isn't SAVEd",
15335 sym
->name
, &sym
->declared_at
);
15337 /* If we have come this far we can apply default-initializers, as
15338 described in 14.7.5, to those variables that have not already
15339 been assigned one. */
15340 if (sym
->ts
.type
== BT_DERIVED
15342 && !sym
->attr
.allocatable
15343 && !sym
->attr
.alloc_comp
)
15345 symbol_attribute
*a
= &sym
->attr
;
15347 if ((!a
->save
&& !a
->dummy
&& !a
->pointer
15348 && !a
->in_common
&& !a
->use_assoc
15350 && !((a
->function
|| a
->result
)
15352 || sym
->ts
.u
.derived
->attr
.alloc_comp
15353 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15354 && !(a
->function
&& sym
!= sym
->result
))
15355 || (a
->dummy
&& a
->intent
== INTENT_OUT
&& !a
->pointer
))
15356 apply_default_init (sym
);
15357 else if (a
->function
&& sym
->result
&& a
->access
!= ACCESS_PRIVATE
15358 && (sym
->ts
.u
.derived
->attr
.alloc_comp
15359 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15360 /* Mark the result symbol to be referenced, when it has allocatable
15362 sym
->result
->attr
.referenced
= 1;
15365 if (sym
->ts
.type
== BT_CLASS
&& sym
->ns
== gfc_current_ns
15366 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
15367 && !CLASS_DATA (sym
)->attr
.class_pointer
15368 && !CLASS_DATA (sym
)->attr
.allocatable
)
15369 apply_default_init (sym
);
15371 /* If this symbol has a type-spec, check it. */
15372 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
15373 || (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
))
15374 if (!resolve_typespec_used (&sym
->ts
, &sym
->declared_at
, sym
->name
))
15377 if (sym
->param_list
)
15382 /************* Resolve DATA statements *************/
15386 gfc_data_value
*vnode
;
15392 /* Advance the values structure to point to the next value in the data list. */
15395 next_data_value (void)
15397 while (mpz_cmp_ui (values
.left
, 0) == 0)
15400 if (values
.vnode
->next
== NULL
)
15403 values
.vnode
= values
.vnode
->next
;
15404 mpz_set (values
.left
, values
.vnode
->repeat
);
15412 check_data_variable (gfc_data_variable
*var
, locus
*where
)
15418 ar_type mark
= AR_UNKNOWN
;
15420 mpz_t section_index
[GFC_MAX_DIMENSIONS
];
15426 if (!gfc_resolve_expr (var
->expr
))
15430 mpz_init_set_si (offset
, 0);
15433 if (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
15434 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
15435 e
= e
->value
.function
.actual
->expr
;
15437 if (e
->expr_type
!= EXPR_VARIABLE
)
15438 gfc_internal_error ("check_data_variable(): Bad expression");
15440 sym
= e
->symtree
->n
.sym
;
15442 if (sym
->ns
->is_block_data
&& !sym
->attr
.in_common
)
15444 gfc_error ("BLOCK DATA element %qs at %L must be in COMMON",
15445 sym
->name
, &sym
->declared_at
);
15448 if (e
->ref
== NULL
&& sym
->as
)
15450 gfc_error ("DATA array %qs at %L must be specified in a previous"
15451 " declaration", sym
->name
, where
);
15455 has_pointer
= sym
->attr
.pointer
;
15457 if (gfc_is_coindexed (e
))
15459 gfc_error ("DATA element %qs at %L cannot have a coindex", sym
->name
,
15464 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15466 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.pointer
)
15470 && ref
->type
== REF_ARRAY
15471 && ref
->u
.ar
.type
!= AR_FULL
)
15473 gfc_error ("DATA element %qs at %L is a pointer and so must "
15474 "be a full array", sym
->name
, where
);
15479 if (e
->rank
== 0 || has_pointer
)
15481 mpz_init_set_ui (size
, 1);
15488 /* Find the array section reference. */
15489 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15491 if (ref
->type
!= REF_ARRAY
)
15493 if (ref
->u
.ar
.type
== AR_ELEMENT
)
15499 /* Set marks according to the reference pattern. */
15500 switch (ref
->u
.ar
.type
)
15508 /* Get the start position of array section. */
15509 gfc_get_section_index (ar
, section_index
, &offset
);
15514 gcc_unreachable ();
15517 if (!gfc_array_size (e
, &size
))
15519 gfc_error ("Nonconstant array section at %L in DATA statement",
15521 mpz_clear (offset
);
15528 while (mpz_cmp_ui (size
, 0) > 0)
15530 if (!next_data_value ())
15532 gfc_error ("DATA statement at %L has more variables than values",
15538 t
= gfc_check_assign (var
->expr
, values
.vnode
->expr
, 0);
15542 /* If we have more than one element left in the repeat count,
15543 and we have more than one element left in the target variable,
15544 then create a range assignment. */
15545 /* FIXME: Only done for full arrays for now, since array sections
15547 if (mark
== AR_FULL
&& ref
&& ref
->next
== NULL
15548 && mpz_cmp_ui (values
.left
, 1) > 0 && mpz_cmp_ui (size
, 1) > 0)
15552 if (mpz_cmp (size
, values
.left
) >= 0)
15554 mpz_init_set (range
, values
.left
);
15555 mpz_sub (size
, size
, values
.left
);
15556 mpz_set_ui (values
.left
, 0);
15560 mpz_init_set (range
, size
);
15561 mpz_sub (values
.left
, values
.left
, size
);
15562 mpz_set_ui (size
, 0);
15565 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15568 mpz_add (offset
, offset
, range
);
15575 /* Assign initial value to symbol. */
15578 mpz_sub_ui (values
.left
, values
.left
, 1);
15579 mpz_sub_ui (size
, size
, 1);
15581 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15586 if (mark
== AR_FULL
)
15587 mpz_add_ui (offset
, offset
, 1);
15589 /* Modify the array section indexes and recalculate the offset
15590 for next element. */
15591 else if (mark
== AR_SECTION
)
15592 gfc_advance_section (section_index
, ar
, &offset
);
15596 if (mark
== AR_SECTION
)
15598 for (i
= 0; i
< ar
->dimen
; i
++)
15599 mpz_clear (section_index
[i
]);
15603 mpz_clear (offset
);
15609 static bool traverse_data_var (gfc_data_variable
*, locus
*);
15611 /* Iterate over a list of elements in a DATA statement. */
15614 traverse_data_list (gfc_data_variable
*var
, locus
*where
)
15617 iterator_stack frame
;
15618 gfc_expr
*e
, *start
, *end
, *step
;
15619 bool retval
= true;
15621 mpz_init (frame
.value
);
15624 start
= gfc_copy_expr (var
->iter
.start
);
15625 end
= gfc_copy_expr (var
->iter
.end
);
15626 step
= gfc_copy_expr (var
->iter
.step
);
15628 if (!gfc_simplify_expr (start
, 1)
15629 || start
->expr_type
!= EXPR_CONSTANT
)
15631 gfc_error ("start of implied-do loop at %L could not be "
15632 "simplified to a constant value", &start
->where
);
15636 if (!gfc_simplify_expr (end
, 1)
15637 || end
->expr_type
!= EXPR_CONSTANT
)
15639 gfc_error ("end of implied-do loop at %L could not be "
15640 "simplified to a constant value", &start
->where
);
15644 if (!gfc_simplify_expr (step
, 1)
15645 || step
->expr_type
!= EXPR_CONSTANT
)
15647 gfc_error ("step of implied-do loop at %L could not be "
15648 "simplified to a constant value", &start
->where
);
15653 mpz_set (trip
, end
->value
.integer
);
15654 mpz_sub (trip
, trip
, start
->value
.integer
);
15655 mpz_add (trip
, trip
, step
->value
.integer
);
15657 mpz_div (trip
, trip
, step
->value
.integer
);
15659 mpz_set (frame
.value
, start
->value
.integer
);
15661 frame
.prev
= iter_stack
;
15662 frame
.variable
= var
->iter
.var
->symtree
;
15663 iter_stack
= &frame
;
15665 while (mpz_cmp_ui (trip
, 0) > 0)
15667 if (!traverse_data_var (var
->list
, where
))
15673 e
= gfc_copy_expr (var
->expr
);
15674 if (!gfc_simplify_expr (e
, 1))
15681 mpz_add (frame
.value
, frame
.value
, step
->value
.integer
);
15683 mpz_sub_ui (trip
, trip
, 1);
15687 mpz_clear (frame
.value
);
15690 gfc_free_expr (start
);
15691 gfc_free_expr (end
);
15692 gfc_free_expr (step
);
15694 iter_stack
= frame
.prev
;
15699 /* Type resolve variables in the variable list of a DATA statement. */
15702 traverse_data_var (gfc_data_variable
*var
, locus
*where
)
15706 for (; var
; var
= var
->next
)
15708 if (var
->expr
== NULL
)
15709 t
= traverse_data_list (var
, where
);
15711 t
= check_data_variable (var
, where
);
15721 /* Resolve the expressions and iterators associated with a data statement.
15722 This is separate from the assignment checking because data lists should
15723 only be resolved once. */
15726 resolve_data_variables (gfc_data_variable
*d
)
15728 for (; d
; d
= d
->next
)
15730 if (d
->list
== NULL
)
15732 if (!gfc_resolve_expr (d
->expr
))
15737 if (!gfc_resolve_iterator (&d
->iter
, false, true))
15740 if (!resolve_data_variables (d
->list
))
15749 /* Resolve a single DATA statement. We implement this by storing a pointer to
15750 the value list into static variables, and then recursively traversing the
15751 variables list, expanding iterators and such. */
15754 resolve_data (gfc_data
*d
)
15757 if (!resolve_data_variables (d
->var
))
15760 values
.vnode
= d
->value
;
15761 if (d
->value
== NULL
)
15762 mpz_set_ui (values
.left
, 0);
15764 mpz_set (values
.left
, d
->value
->repeat
);
15766 if (!traverse_data_var (d
->var
, &d
->where
))
15769 /* At this point, we better not have any values left. */
15771 if (next_data_value ())
15772 gfc_error ("DATA statement at %L has more values than variables",
15777 /* 12.6 Constraint: In a pure subprogram any variable which is in common or
15778 accessed by host or use association, is a dummy argument to a pure function,
15779 is a dummy argument with INTENT (IN) to a pure subroutine, or an object that
15780 is storage associated with any such variable, shall not be used in the
15781 following contexts: (clients of this function). */
15783 /* Determines if a variable is not 'pure', i.e., not assignable within a pure
15784 procedure. Returns zero if assignment is OK, nonzero if there is a
15787 gfc_impure_variable (gfc_symbol
*sym
)
15792 if (sym
->attr
.use_assoc
|| sym
->attr
.in_common
)
15795 /* Check if the symbol's ns is inside the pure procedure. */
15796 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15800 if (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.function
)
15804 proc
= sym
->ns
->proc_name
;
15805 if (sym
->attr
.dummy
15806 && ((proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_IN
)
15807 || proc
->attr
.function
))
15810 /* TODO: Sort out what can be storage associated, if anything, and include
15811 it here. In principle equivalences should be scanned but it does not
15812 seem to be possible to storage associate an impure variable this way. */
15817 /* Test whether a symbol is pure or not. For a NULL pointer, checks if the
15818 current namespace is inside a pure procedure. */
15821 gfc_pure (gfc_symbol
*sym
)
15823 symbol_attribute attr
;
15828 /* Check if the current namespace or one of its parents
15829 belongs to a pure procedure. */
15830 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15832 sym
= ns
->proc_name
;
15836 if (attr
.flavor
== FL_PROCEDURE
&& attr
.pure
)
15844 return attr
.flavor
== FL_PROCEDURE
&& attr
.pure
;
15848 /* Test whether a symbol is implicitly pure or not. For a NULL pointer,
15849 checks if the current namespace is implicitly pure. Note that this
15850 function returns false for a PURE procedure. */
15853 gfc_implicit_pure (gfc_symbol
*sym
)
15859 /* Check if the current procedure is implicit_pure. Walk up
15860 the procedure list until we find a procedure. */
15861 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15863 sym
= ns
->proc_name
;
15867 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15872 return sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.implicit_pure
15873 && !sym
->attr
.pure
;
15878 gfc_unset_implicit_pure (gfc_symbol
*sym
)
15884 /* Check if the current procedure is implicit_pure. Walk up
15885 the procedure list until we find a procedure. */
15886 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15888 sym
= ns
->proc_name
;
15892 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15897 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15898 sym
->attr
.implicit_pure
= 0;
15900 sym
->attr
.pure
= 0;
15904 /* Test whether the current procedure is elemental or not. */
15907 gfc_elemental (gfc_symbol
*sym
)
15909 symbol_attribute attr
;
15912 sym
= gfc_current_ns
->proc_name
;
15917 return attr
.flavor
== FL_PROCEDURE
&& attr
.elemental
;
15921 /* Warn about unused labels. */
15924 warn_unused_fortran_label (gfc_st_label
*label
)
15929 warn_unused_fortran_label (label
->left
);
15931 if (label
->defined
== ST_LABEL_UNKNOWN
)
15934 switch (label
->referenced
)
15936 case ST_LABEL_UNKNOWN
:
15937 gfc_warning (OPT_Wunused_label
, "Label %d at %L defined but not used",
15938 label
->value
, &label
->where
);
15941 case ST_LABEL_BAD_TARGET
:
15942 gfc_warning (OPT_Wunused_label
,
15943 "Label %d at %L defined but cannot be used",
15944 label
->value
, &label
->where
);
15951 warn_unused_fortran_label (label
->right
);
15955 /* Returns the sequence type of a symbol or sequence. */
15958 sequence_type (gfc_typespec ts
)
15967 if (ts
.u
.derived
->components
== NULL
)
15968 return SEQ_NONDEFAULT
;
15970 result
= sequence_type (ts
.u
.derived
->components
->ts
);
15971 for (c
= ts
.u
.derived
->components
->next
; c
; c
= c
->next
)
15972 if (sequence_type (c
->ts
) != result
)
15978 if (ts
.kind
!= gfc_default_character_kind
)
15979 return SEQ_NONDEFAULT
;
15981 return SEQ_CHARACTER
;
15984 if (ts
.kind
!= gfc_default_integer_kind
)
15985 return SEQ_NONDEFAULT
;
15987 return SEQ_NUMERIC
;
15990 if (!(ts
.kind
== gfc_default_real_kind
15991 || ts
.kind
== gfc_default_double_kind
))
15992 return SEQ_NONDEFAULT
;
15994 return SEQ_NUMERIC
;
15997 if (ts
.kind
!= gfc_default_complex_kind
)
15998 return SEQ_NONDEFAULT
;
16000 return SEQ_NUMERIC
;
16003 if (ts
.kind
!= gfc_default_logical_kind
)
16004 return SEQ_NONDEFAULT
;
16006 return SEQ_NUMERIC
;
16009 return SEQ_NONDEFAULT
;
16014 /* Resolve derived type EQUIVALENCE object. */
16017 resolve_equivalence_derived (gfc_symbol
*derived
, gfc_symbol
*sym
, gfc_expr
*e
)
16019 gfc_component
*c
= derived
->components
;
16024 /* Shall not be an object of nonsequence derived type. */
16025 if (!derived
->attr
.sequence
)
16027 gfc_error ("Derived type variable %qs at %L must have SEQUENCE "
16028 "attribute to be an EQUIVALENCE object", sym
->name
,
16033 /* Shall not have allocatable components. */
16034 if (derived
->attr
.alloc_comp
)
16036 gfc_error ("Derived type variable %qs at %L cannot have ALLOCATABLE "
16037 "components to be an EQUIVALENCE object",sym
->name
,
16042 if (sym
->attr
.in_common
&& gfc_has_default_initializer (sym
->ts
.u
.derived
))
16044 gfc_error ("Derived type variable %qs at %L with default "
16045 "initialization cannot be in EQUIVALENCE with a variable "
16046 "in COMMON", sym
->name
, &e
->where
);
16050 for (; c
; c
= c
->next
)
16052 if (gfc_bt_struct (c
->ts
.type
)
16053 && (!resolve_equivalence_derived(c
->ts
.u
.derived
, sym
, e
)))
16056 /* Shall not be an object of sequence derived type containing a pointer
16057 in the structure. */
16058 if (c
->attr
.pointer
)
16060 gfc_error ("Derived type variable %qs at %L with pointer "
16061 "component(s) cannot be an EQUIVALENCE object",
16062 sym
->name
, &e
->where
);
16070 /* Resolve equivalence object.
16071 An EQUIVALENCE object shall not be a dummy argument, a pointer, a target,
16072 an allocatable array, an object of nonsequence derived type, an object of
16073 sequence derived type containing a pointer at any level of component
16074 selection, an automatic object, a function name, an entry name, a result
16075 name, a named constant, a structure component, or a subobject of any of
16076 the preceding objects. A substring shall not have length zero. A
16077 derived type shall not have components with default initialization nor
16078 shall two objects of an equivalence group be initialized.
16079 Either all or none of the objects shall have an protected attribute.
16080 The simple constraints are done in symbol.c(check_conflict) and the rest
16081 are implemented here. */
16084 resolve_equivalence (gfc_equiv
*eq
)
16087 gfc_symbol
*first_sym
;
16090 locus
*last_where
= NULL
;
16091 seq_type eq_type
, last_eq_type
;
16092 gfc_typespec
*last_ts
;
16093 int object
, cnt_protected
;
16096 last_ts
= &eq
->expr
->symtree
->n
.sym
->ts
;
16098 first_sym
= eq
->expr
->symtree
->n
.sym
;
16102 for (object
= 1; eq
; eq
= eq
->eq
, object
++)
16106 e
->ts
= e
->symtree
->n
.sym
->ts
;
16107 /* match_varspec might not know yet if it is seeing
16108 array reference or substring reference, as it doesn't
16110 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
)
16112 gfc_ref
*ref
= e
->ref
;
16113 sym
= e
->symtree
->n
.sym
;
16115 if (sym
->attr
.dimension
)
16117 ref
->u
.ar
.as
= sym
->as
;
16121 /* For substrings, convert REF_ARRAY into REF_SUBSTRING. */
16122 if (e
->ts
.type
== BT_CHARACTER
16124 && ref
->type
== REF_ARRAY
16125 && ref
->u
.ar
.dimen
== 1
16126 && ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
16127 && ref
->u
.ar
.stride
[0] == NULL
)
16129 gfc_expr
*start
= ref
->u
.ar
.start
[0];
16130 gfc_expr
*end
= ref
->u
.ar
.end
[0];
16133 /* Optimize away the (:) reference. */
16134 if (start
== NULL
&& end
== NULL
)
16137 e
->ref
= ref
->next
;
16139 e
->ref
->next
= ref
->next
;
16144 ref
->type
= REF_SUBSTRING
;
16146 start
= gfc_get_int_expr (gfc_charlen_int_kind
,
16148 ref
->u
.ss
.start
= start
;
16149 if (end
== NULL
&& e
->ts
.u
.cl
)
16150 end
= gfc_copy_expr (e
->ts
.u
.cl
->length
);
16151 ref
->u
.ss
.end
= end
;
16152 ref
->u
.ss
.length
= e
->ts
.u
.cl
;
16159 /* Any further ref is an error. */
16162 gcc_assert (ref
->type
== REF_ARRAY
);
16163 gfc_error ("Syntax error in EQUIVALENCE statement at %L",
16169 if (!gfc_resolve_expr (e
))
16172 sym
= e
->symtree
->n
.sym
;
16174 if (sym
->attr
.is_protected
)
16176 if (cnt_protected
> 0 && cnt_protected
!= object
)
16178 gfc_error ("Either all or none of the objects in the "
16179 "EQUIVALENCE set at %L shall have the "
16180 "PROTECTED attribute",
16185 /* Shall not equivalence common block variables in a PURE procedure. */
16186 if (sym
->ns
->proc_name
16187 && sym
->ns
->proc_name
->attr
.pure
16188 && sym
->attr
.in_common
)
16190 /* Need to check for symbols that may have entered the pure
16191 procedure via a USE statement. */
16192 bool saw_sym
= false;
16193 if (sym
->ns
->use_stmts
)
16196 for (r
= sym
->ns
->use_stmts
->rename
; r
; r
= r
->next
)
16197 if (strcmp(r
->use_name
, sym
->name
) == 0) saw_sym
= true;
16203 gfc_error ("COMMON block member %qs at %L cannot be an "
16204 "EQUIVALENCE object in the pure procedure %qs",
16205 sym
->name
, &e
->where
, sym
->ns
->proc_name
->name
);
16209 /* Shall not be a named constant. */
16210 if (e
->expr_type
== EXPR_CONSTANT
)
16212 gfc_error ("Named constant %qs at %L cannot be an EQUIVALENCE "
16213 "object", sym
->name
, &e
->where
);
16217 if (e
->ts
.type
== BT_DERIVED
16218 && !resolve_equivalence_derived (e
->ts
.u
.derived
, sym
, e
))
16221 /* Check that the types correspond correctly:
16223 A numeric sequence structure may be equivalenced to another sequence
16224 structure, an object of default integer type, default real type, double
16225 precision real type, default logical type such that components of the
16226 structure ultimately only become associated to objects of the same
16227 kind. A character sequence structure may be equivalenced to an object
16228 of default character kind or another character sequence structure.
16229 Other objects may be equivalenced only to objects of the same type and
16230 kind parameters. */
16232 /* Identical types are unconditionally OK. */
16233 if (object
== 1 || gfc_compare_types (last_ts
, &sym
->ts
))
16234 goto identical_types
;
16236 last_eq_type
= sequence_type (*last_ts
);
16237 eq_type
= sequence_type (sym
->ts
);
16239 /* Since the pair of objects is not of the same type, mixed or
16240 non-default sequences can be rejected. */
16242 msg
= "Sequence %s with mixed components in EQUIVALENCE "
16243 "statement at %L with different type objects";
16245 && last_eq_type
== SEQ_MIXED
16246 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16247 || (eq_type
== SEQ_MIXED
16248 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16251 msg
= "Non-default type object or sequence %s in EQUIVALENCE "
16252 "statement at %L with objects of different type";
16254 && last_eq_type
== SEQ_NONDEFAULT
16255 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16256 || (eq_type
== SEQ_NONDEFAULT
16257 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16260 msg
="Non-CHARACTER object %qs in default CHARACTER "
16261 "EQUIVALENCE statement at %L";
16262 if (last_eq_type
== SEQ_CHARACTER
16263 && eq_type
!= SEQ_CHARACTER
16264 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16267 msg
="Non-NUMERIC object %qs in default NUMERIC "
16268 "EQUIVALENCE statement at %L";
16269 if (last_eq_type
== SEQ_NUMERIC
16270 && eq_type
!= SEQ_NUMERIC
16271 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16276 last_where
= &e
->where
;
16281 /* Shall not be an automatic array. */
16282 if (e
->ref
->type
== REF_ARRAY
16283 && !gfc_resolve_array_spec (e
->ref
->u
.ar
.as
, 1))
16285 gfc_error ("Array %qs at %L with non-constant bounds cannot be "
16286 "an EQUIVALENCE object", sym
->name
, &e
->where
);
16293 /* Shall not be a structure component. */
16294 if (r
->type
== REF_COMPONENT
)
16296 gfc_error ("Structure component %qs at %L cannot be an "
16297 "EQUIVALENCE object",
16298 r
->u
.c
.component
->name
, &e
->where
);
16302 /* A substring shall not have length zero. */
16303 if (r
->type
== REF_SUBSTRING
)
16305 if (compare_bound (r
->u
.ss
.start
, r
->u
.ss
.end
) == CMP_GT
)
16307 gfc_error ("Substring at %L has length zero",
16308 &r
->u
.ss
.start
->where
);
16318 /* Function called by resolve_fntype to flag other symbol used in the
16319 length type parameter specification of function resuls. */
16322 flag_fn_result_spec (gfc_expr
*expr
,
16324 int *f ATTRIBUTE_UNUSED
)
16329 if (expr
->expr_type
== EXPR_VARIABLE
)
16331 s
= expr
->symtree
->n
.sym
;
16332 for (ns
= s
->ns
; ns
; ns
= ns
->parent
)
16338 gfc_error ("Self reference in character length expression "
16339 "for %qs at %L", sym
->name
, &expr
->where
);
16343 if (!s
->fn_result_spec
16344 && s
->attr
.flavor
== FL_PARAMETER
)
16346 /* Function contained in a module.... */
16347 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_MODULE
)
16350 s
->fn_result_spec
= 1;
16351 /* Make sure that this symbol is translated as a module
16353 st
= gfc_get_unique_symtree (ns
);
16357 /* ... which is use associated and called. */
16358 else if (s
->attr
.use_assoc
|| s
->attr
.used_in_submodule
16360 /* External function matched with an interface. */
16363 && s
->ns
->proc_name
->attr
.if_source
== IFSRC_DECL
)
16364 || s
->ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16365 && s
->ns
->proc_name
->attr
.function
))
16366 s
->fn_result_spec
= 1;
16373 /* Resolve function and ENTRY types, issue diagnostics if needed. */
16376 resolve_fntype (gfc_namespace
*ns
)
16378 gfc_entry_list
*el
;
16381 if (ns
->proc_name
== NULL
|| !ns
->proc_name
->attr
.function
)
16384 /* If there are any entries, ns->proc_name is the entry master
16385 synthetic symbol and ns->entries->sym actual FUNCTION symbol. */
16387 sym
= ns
->entries
->sym
;
16389 sym
= ns
->proc_name
;
16390 if (sym
->result
== sym
16391 && sym
->ts
.type
== BT_UNKNOWN
16392 && !gfc_set_default_type (sym
, 0, NULL
)
16393 && !sym
->attr
.untyped
)
16395 gfc_error ("Function %qs at %L has no IMPLICIT type",
16396 sym
->name
, &sym
->declared_at
);
16397 sym
->attr
.untyped
= 1;
16400 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->ts
.u
.derived
->attr
.use_assoc
16401 && !sym
->attr
.contained
16402 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
16403 && gfc_check_symbol_access (sym
))
16405 gfc_notify_std (GFC_STD_F2003
, "PUBLIC function %qs at "
16406 "%L of PRIVATE type %qs", sym
->name
,
16407 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
16411 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
16413 if (el
->sym
->result
== el
->sym
16414 && el
->sym
->ts
.type
== BT_UNKNOWN
16415 && !gfc_set_default_type (el
->sym
, 0, NULL
)
16416 && !el
->sym
->attr
.untyped
)
16418 gfc_error ("ENTRY %qs at %L has no IMPLICIT type",
16419 el
->sym
->name
, &el
->sym
->declared_at
);
16420 el
->sym
->attr
.untyped
= 1;
16424 if (sym
->ts
.type
== BT_CHARACTER
)
16425 gfc_traverse_expr (sym
->ts
.u
.cl
->length
, sym
, flag_fn_result_spec
, 0);
16429 /* 12.3.2.1.1 Defined operators. */
16432 check_uop_procedure (gfc_symbol
*sym
, locus where
)
16434 gfc_formal_arglist
*formal
;
16436 if (!sym
->attr
.function
)
16438 gfc_error ("User operator procedure %qs at %L must be a FUNCTION",
16439 sym
->name
, &where
);
16443 if (sym
->ts
.type
== BT_CHARACTER
16444 && !((sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
) || sym
->ts
.deferred
)
16445 && !(sym
->result
&& ((sym
->result
->ts
.u
.cl
16446 && sym
->result
->ts
.u
.cl
->length
) || sym
->result
->ts
.deferred
)))
16448 gfc_error ("User operator procedure %qs at %L cannot be assumed "
16449 "character length", sym
->name
, &where
);
16453 formal
= gfc_sym_get_dummy_args (sym
);
16454 if (!formal
|| !formal
->sym
)
16456 gfc_error ("User operator procedure %qs at %L must have at least "
16457 "one argument", sym
->name
, &where
);
16461 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16463 gfc_error ("First argument of operator interface at %L must be "
16464 "INTENT(IN)", &where
);
16468 if (formal
->sym
->attr
.optional
)
16470 gfc_error ("First argument of operator interface at %L cannot be "
16471 "optional", &where
);
16475 formal
= formal
->next
;
16476 if (!formal
|| !formal
->sym
)
16479 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16481 gfc_error ("Second argument of operator interface at %L must be "
16482 "INTENT(IN)", &where
);
16486 if (formal
->sym
->attr
.optional
)
16488 gfc_error ("Second argument of operator interface at %L cannot be "
16489 "optional", &where
);
16495 gfc_error ("Operator interface at %L must have, at most, two "
16496 "arguments", &where
);
16504 gfc_resolve_uops (gfc_symtree
*symtree
)
16506 gfc_interface
*itr
;
16508 if (symtree
== NULL
)
16511 gfc_resolve_uops (symtree
->left
);
16512 gfc_resolve_uops (symtree
->right
);
16514 for (itr
= symtree
->n
.uop
->op
; itr
; itr
= itr
->next
)
16515 check_uop_procedure (itr
->sym
, itr
->sym
->declared_at
);
16519 /* Examine all of the expressions associated with a program unit,
16520 assign types to all intermediate expressions, make sure that all
16521 assignments are to compatible types and figure out which names
16522 refer to which functions or subroutines. It doesn't check code
16523 block, which is handled by gfc_resolve_code. */
16526 resolve_types (gfc_namespace
*ns
)
16532 gfc_namespace
* old_ns
= gfc_current_ns
;
16534 if (ns
->types_resolved
)
16537 /* Check that all IMPLICIT types are ok. */
16538 if (!ns
->seen_implicit_none
)
16541 for (letter
= 0; letter
!= GFC_LETTERS
; ++letter
)
16542 if (ns
->set_flag
[letter
]
16543 && !resolve_typespec_used (&ns
->default_type
[letter
],
16544 &ns
->implicit_loc
[letter
], NULL
))
16548 gfc_current_ns
= ns
;
16550 resolve_entries (ns
);
16552 resolve_common_vars (&ns
->blank_common
, false);
16553 resolve_common_blocks (ns
->common_root
);
16555 resolve_contained_functions (ns
);
16557 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
16558 && ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16559 resolve_formal_arglist (ns
->proc_name
);
16561 gfc_traverse_ns (ns
, resolve_bind_c_derived_types
);
16563 for (cl
= ns
->cl_list
; cl
; cl
= cl
->next
)
16564 resolve_charlen (cl
);
16566 gfc_traverse_ns (ns
, resolve_symbol
);
16568 resolve_fntype (ns
);
16570 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16572 if (gfc_pure (ns
->proc_name
) && !gfc_pure (n
->proc_name
))
16573 gfc_error ("Contained procedure %qs at %L of a PURE procedure must "
16574 "also be PURE", n
->proc_name
->name
,
16575 &n
->proc_name
->declared_at
);
16581 gfc_do_concurrent_flag
= 0;
16582 gfc_check_interfaces (ns
);
16584 gfc_traverse_ns (ns
, resolve_values
);
16590 for (d
= ns
->data
; d
; d
= d
->next
)
16594 gfc_traverse_ns (ns
, gfc_formalize_init_value
);
16596 gfc_traverse_ns (ns
, gfc_verify_binding_labels
);
16598 for (eq
= ns
->equiv
; eq
; eq
= eq
->next
)
16599 resolve_equivalence (eq
);
16601 /* Warn about unused labels. */
16602 if (warn_unused_label
)
16603 warn_unused_fortran_label (ns
->st_labels
);
16605 gfc_resolve_uops (ns
->uop_root
);
16607 gfc_traverse_ns (ns
, gfc_verify_DTIO_procedures
);
16609 gfc_resolve_omp_declare_simd (ns
);
16611 gfc_resolve_omp_udrs (ns
->omp_udr_root
);
16613 ns
->types_resolved
= 1;
16615 gfc_current_ns
= old_ns
;
16619 /* Call gfc_resolve_code recursively. */
16622 resolve_codes (gfc_namespace
*ns
)
16625 bitmap_obstack old_obstack
;
16627 if (ns
->resolved
== 1)
16630 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16633 gfc_current_ns
= ns
;
16635 /* Don't clear 'cs_base' if this is the namespace of a BLOCK construct. */
16636 if (!(ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_LABEL
))
16639 /* Set to an out of range value. */
16640 current_entry_id
= -1;
16642 old_obstack
= labels_obstack
;
16643 bitmap_obstack_initialize (&labels_obstack
);
16645 gfc_resolve_oacc_declare (ns
);
16646 gfc_resolve_omp_local_vars (ns
);
16647 gfc_resolve_code (ns
->code
, ns
);
16649 bitmap_obstack_release (&labels_obstack
);
16650 labels_obstack
= old_obstack
;
16654 /* This function is called after a complete program unit has been compiled.
16655 Its purpose is to examine all of the expressions associated with a program
16656 unit, assign types to all intermediate expressions, make sure that all
16657 assignments are to compatible types and figure out which names refer to
16658 which functions or subroutines. */
16661 gfc_resolve (gfc_namespace
*ns
)
16663 gfc_namespace
*old_ns
;
16664 code_stack
*old_cs_base
;
16665 struct gfc_omp_saved_state old_omp_state
;
16671 old_ns
= gfc_current_ns
;
16672 old_cs_base
= cs_base
;
16674 /* As gfc_resolve can be called during resolution of an OpenMP construct
16675 body, we should clear any state associated to it, so that say NS's
16676 DO loops are not interpreted as OpenMP loops. */
16677 if (!ns
->construct_entities
)
16678 gfc_omp_save_and_clear_state (&old_omp_state
);
16680 resolve_types (ns
);
16681 component_assignment_level
= 0;
16682 resolve_codes (ns
);
16684 gfc_current_ns
= old_ns
;
16685 cs_base
= old_cs_base
;
16688 gfc_run_passes (ns
);
16690 if (!ns
->construct_entities
)
16691 gfc_omp_restore_state (&old_omp_state
);