1 /* Perform type resolution on the various structures.
2 Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
3 Free Software Foundation, Inc.
4 Contributed by Andy Vaught
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
28 #include "arith.h" /* For gfc_compare_expr(). */
29 #include "dependency.h"
31 #include "target-memory.h" /* for gfc_simplify_transfer */
32 #include "constructor.h"
34 /* Types used in equivalence statements. */
38 SEQ_NONDEFAULT
, SEQ_NUMERIC
, SEQ_CHARACTER
, SEQ_MIXED
42 /* Stack to keep track of the nesting of blocks as we move through the
43 code. See resolve_branch() and resolve_code(). */
45 typedef struct code_stack
47 struct gfc_code
*head
, *current
;
48 struct code_stack
*prev
;
50 /* This bitmap keeps track of the targets valid for a branch from
51 inside this block except for END {IF|SELECT}s of enclosing
53 bitmap reachable_labels
;
57 static code_stack
*cs_base
= NULL
;
60 /* Nonzero if we're inside a FORALL block. */
62 static int forall_flag
;
64 /* Nonzero if we're inside a OpenMP WORKSHARE or PARALLEL WORKSHARE block. */
66 static int omp_workshare_flag
;
68 /* Nonzero if we are processing a formal arglist. The corresponding function
69 resets the flag each time that it is read. */
70 static int formal_arg_flag
= 0;
72 /* True if we are resolving a specification expression. */
73 static int specification_expr
= 0;
75 /* The id of the last entry seen. */
76 static int current_entry_id
;
78 /* We use bitmaps to determine if a branch target is valid. */
79 static bitmap_obstack labels_obstack
;
81 /* True when simplifying a EXPR_VARIABLE argument to an inquiry function. */
82 static bool inquiry_argument
= false;
85 gfc_is_formal_arg (void)
87 return formal_arg_flag
;
90 /* Is the symbol host associated? */
92 is_sym_host_assoc (gfc_symbol
*sym
, gfc_namespace
*ns
)
94 for (ns
= ns
->parent
; ns
; ns
= ns
->parent
)
103 /* Ensure a typespec used is valid; for instance, TYPE(t) is invalid if t is
104 an ABSTRACT derived-type. If where is not NULL, an error message with that
105 locus is printed, optionally using name. */
108 resolve_typespec_used (gfc_typespec
* ts
, locus
* where
, const char* name
)
110 if (ts
->type
== BT_DERIVED
&& ts
->u
.derived
->attr
.abstract
)
115 gfc_error ("'%s' at %L is of the ABSTRACT type '%s'",
116 name
, where
, ts
->u
.derived
->name
);
118 gfc_error ("ABSTRACT type '%s' used at %L",
119 ts
->u
.derived
->name
, where
);
129 /* Resolve types of formal argument lists. These have to be done early so that
130 the formal argument lists of module procedures can be copied to the
131 containing module before the individual procedures are resolved
132 individually. We also resolve argument lists of procedures in interface
133 blocks because they are self-contained scoping units.
135 Since a dummy argument cannot be a non-dummy procedure, the only
136 resort left for untyped names are the IMPLICIT types. */
139 resolve_formal_arglist (gfc_symbol
*proc
)
141 gfc_formal_arglist
*f
;
145 if (proc
->result
!= NULL
)
150 if (gfc_elemental (proc
)
151 || sym
->attr
.pointer
|| sym
->attr
.allocatable
152 || (sym
->as
&& sym
->as
->rank
> 0))
154 proc
->attr
.always_explicit
= 1;
155 sym
->attr
.always_explicit
= 1;
160 for (f
= proc
->formal
; f
; f
= f
->next
)
166 /* Alternate return placeholder. */
167 if (gfc_elemental (proc
))
168 gfc_error ("Alternate return specifier in elemental subroutine "
169 "'%s' at %L is not allowed", proc
->name
,
171 if (proc
->attr
.function
)
172 gfc_error ("Alternate return specifier in function "
173 "'%s' at %L is not allowed", proc
->name
,
178 if (sym
->attr
.if_source
!= IFSRC_UNKNOWN
)
179 resolve_formal_arglist (sym
);
181 if (sym
->attr
.subroutine
|| sym
->attr
.external
|| sym
->attr
.intrinsic
)
183 if (gfc_pure (proc
) && !gfc_pure (sym
))
185 gfc_error ("Dummy procedure '%s' of PURE procedure at %L must "
186 "also be PURE", sym
->name
, &sym
->declared_at
);
190 if (gfc_elemental (proc
))
192 gfc_error ("Dummy procedure at %L not allowed in ELEMENTAL "
193 "procedure", &sym
->declared_at
);
197 if (sym
->attr
.function
198 && sym
->ts
.type
== BT_UNKNOWN
199 && sym
->attr
.intrinsic
)
201 gfc_intrinsic_sym
*isym
;
202 isym
= gfc_find_function (sym
->name
);
203 if (isym
== NULL
|| !isym
->specific
)
205 gfc_error ("Unable to find a specific INTRINSIC procedure "
206 "for the reference '%s' at %L", sym
->name
,
215 if (sym
->ts
.type
== BT_UNKNOWN
)
217 if (!sym
->attr
.function
|| sym
->result
== sym
)
218 gfc_set_default_type (sym
, 1, sym
->ns
);
221 gfc_resolve_array_spec (sym
->as
, 0);
223 /* We can't tell if an array with dimension (:) is assumed or deferred
224 shape until we know if it has the pointer or allocatable attributes.
226 if (sym
->as
&& sym
->as
->rank
> 0 && sym
->as
->type
== AS_DEFERRED
227 && !(sym
->attr
.pointer
|| sym
->attr
.allocatable
))
229 sym
->as
->type
= AS_ASSUMED_SHAPE
;
230 for (i
= 0; i
< sym
->as
->rank
; i
++)
231 sym
->as
->lower
[i
] = gfc_get_int_expr (gfc_default_integer_kind
,
235 if ((sym
->as
&& sym
->as
->rank
> 0 && sym
->as
->type
== AS_ASSUMED_SHAPE
)
236 || sym
->attr
.pointer
|| sym
->attr
.allocatable
|| sym
->attr
.target
237 || sym
->attr
.optional
)
239 proc
->attr
.always_explicit
= 1;
241 proc
->result
->attr
.always_explicit
= 1;
244 /* If the flavor is unknown at this point, it has to be a variable.
245 A procedure specification would have already set the type. */
247 if (sym
->attr
.flavor
== FL_UNKNOWN
)
248 gfc_add_flavor (&sym
->attr
, FL_VARIABLE
, sym
->name
, &sym
->declared_at
);
250 if (gfc_pure (proc
) && !sym
->attr
.pointer
251 && sym
->attr
.flavor
!= FL_PROCEDURE
)
253 if (proc
->attr
.function
&& sym
->attr
.intent
!= INTENT_IN
)
254 gfc_error ("Argument '%s' of pure function '%s' at %L must be "
255 "INTENT(IN)", sym
->name
, proc
->name
,
258 if (proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_UNKNOWN
)
259 gfc_error ("Argument '%s' of pure subroutine '%s' at %L must "
260 "have its INTENT specified", sym
->name
, proc
->name
,
264 if (gfc_elemental (proc
))
267 if (sym
->attr
.codimension
)
269 gfc_error ("Coarray dummy argument '%s' at %L to elemental "
270 "procedure", sym
->name
, &sym
->declared_at
);
276 gfc_error ("Argument '%s' of elemental procedure at %L must "
277 "be scalar", sym
->name
, &sym
->declared_at
);
281 if (sym
->attr
.pointer
)
283 gfc_error ("Argument '%s' of elemental procedure at %L cannot "
284 "have the POINTER attribute", sym
->name
,
289 if (sym
->attr
.flavor
== FL_PROCEDURE
)
291 gfc_error ("Dummy procedure '%s' not allowed in elemental "
292 "procedure '%s' at %L", sym
->name
, proc
->name
,
298 /* Each dummy shall be specified to be scalar. */
299 if (proc
->attr
.proc
== PROC_ST_FUNCTION
)
303 gfc_error ("Argument '%s' of statement function at %L must "
304 "be scalar", sym
->name
, &sym
->declared_at
);
308 if (sym
->ts
.type
== BT_CHARACTER
)
310 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
311 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
313 gfc_error ("Character-valued argument '%s' of statement "
314 "function at %L must have constant length",
315 sym
->name
, &sym
->declared_at
);
325 /* Work function called when searching for symbols that have argument lists
326 associated with them. */
329 find_arglists (gfc_symbol
*sym
)
331 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
|| sym
->ns
!= gfc_current_ns
)
334 resolve_formal_arglist (sym
);
338 /* Given a namespace, resolve all formal argument lists within the namespace.
342 resolve_formal_arglists (gfc_namespace
*ns
)
347 gfc_traverse_ns (ns
, find_arglists
);
352 resolve_contained_fntype (gfc_symbol
*sym
, gfc_namespace
*ns
)
356 /* If this namespace is not a function or an entry master function,
358 if (! sym
|| !(sym
->attr
.function
|| sym
->attr
.flavor
== FL_VARIABLE
)
359 || sym
->attr
.entry_master
)
362 /* Try to find out of what the return type is. */
363 if (sym
->result
->ts
.type
== BT_UNKNOWN
&& sym
->result
->ts
.interface
== NULL
)
365 t
= gfc_set_default_type (sym
->result
, 0, ns
);
367 if (t
== FAILURE
&& !sym
->result
->attr
.untyped
)
369 if (sym
->result
== sym
)
370 gfc_error ("Contained function '%s' at %L has no IMPLICIT type",
371 sym
->name
, &sym
->declared_at
);
372 else if (!sym
->result
->attr
.proc_pointer
)
373 gfc_error ("Result '%s' of contained function '%s' at %L has "
374 "no IMPLICIT type", sym
->result
->name
, sym
->name
,
375 &sym
->result
->declared_at
);
376 sym
->result
->attr
.untyped
= 1;
380 /* Fortran 95 Draft Standard, page 51, Section 5.1.1.5, on the Character
381 type, lists the only ways a character length value of * can be used:
382 dummy arguments of procedures, named constants, and function results
383 in external functions. Internal function results and results of module
384 procedures are not on this list, ergo, not permitted. */
386 if (sym
->result
->ts
.type
== BT_CHARACTER
)
388 gfc_charlen
*cl
= sym
->result
->ts
.u
.cl
;
389 if (!cl
|| !cl
->length
)
391 /* See if this is a module-procedure and adapt error message
394 gcc_assert (ns
->parent
&& ns
->parent
->proc_name
);
395 module_proc
= (ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
);
397 gfc_error ("Character-valued %s '%s' at %L must not be"
399 module_proc
? _("module procedure")
400 : _("internal function"),
401 sym
->name
, &sym
->declared_at
);
407 /* Add NEW_ARGS to the formal argument list of PROC, taking care not to
408 introduce duplicates. */
411 merge_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
413 gfc_formal_arglist
*f
, *new_arglist
;
416 for (; new_args
!= NULL
; new_args
= new_args
->next
)
418 new_sym
= new_args
->sym
;
419 /* See if this arg is already in the formal argument list. */
420 for (f
= proc
->formal
; f
; f
= f
->next
)
422 if (new_sym
== f
->sym
)
429 /* Add a new argument. Argument order is not important. */
430 new_arglist
= gfc_get_formal_arglist ();
431 new_arglist
->sym
= new_sym
;
432 new_arglist
->next
= proc
->formal
;
433 proc
->formal
= new_arglist
;
438 /* Flag the arguments that are not present in all entries. */
441 check_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
443 gfc_formal_arglist
*f
, *head
;
446 for (f
= proc
->formal
; f
; f
= f
->next
)
451 for (new_args
= head
; new_args
; new_args
= new_args
->next
)
453 if (new_args
->sym
== f
->sym
)
460 f
->sym
->attr
.not_always_present
= 1;
465 /* Resolve alternate entry points. If a symbol has multiple entry points we
466 create a new master symbol for the main routine, and turn the existing
467 symbol into an entry point. */
470 resolve_entries (gfc_namespace
*ns
)
472 gfc_namespace
*old_ns
;
476 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
477 static int master_count
= 0;
479 if (ns
->proc_name
== NULL
)
482 /* No need to do anything if this procedure doesn't have alternate entry
487 /* We may already have resolved alternate entry points. */
488 if (ns
->proc_name
->attr
.entry_master
)
491 /* If this isn't a procedure something has gone horribly wrong. */
492 gcc_assert (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
);
494 /* Remember the current namespace. */
495 old_ns
= gfc_current_ns
;
499 /* Add the main entry point to the list of entry points. */
500 el
= gfc_get_entry_list ();
501 el
->sym
= ns
->proc_name
;
503 el
->next
= ns
->entries
;
505 ns
->proc_name
->attr
.entry
= 1;
507 /* If it is a module function, it needs to be in the right namespace
508 so that gfc_get_fake_result_decl can gather up the results. The
509 need for this arose in get_proc_name, where these beasts were
510 left in their own namespace, to keep prior references linked to
511 the entry declaration.*/
512 if (ns
->proc_name
->attr
.function
513 && ns
->parent
&& ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
516 /* Do the same for entries where the master is not a module
517 procedure. These are retained in the module namespace because
518 of the module procedure declaration. */
519 for (el
= el
->next
; el
; el
= el
->next
)
520 if (el
->sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
521 && el
->sym
->attr
.mod_proc
)
525 /* Add an entry statement for it. */
532 /* Create a new symbol for the master function. */
533 /* Give the internal function a unique name (within this file).
534 Also include the function name so the user has some hope of figuring
535 out what is going on. */
536 snprintf (name
, GFC_MAX_SYMBOL_LEN
, "master.%d.%s",
537 master_count
++, ns
->proc_name
->name
);
538 gfc_get_ha_symbol (name
, &proc
);
539 gcc_assert (proc
!= NULL
);
541 gfc_add_procedure (&proc
->attr
, PROC_INTERNAL
, proc
->name
, NULL
);
542 if (ns
->proc_name
->attr
.subroutine
)
543 gfc_add_subroutine (&proc
->attr
, proc
->name
, NULL
);
547 gfc_typespec
*ts
, *fts
;
548 gfc_array_spec
*as
, *fas
;
549 gfc_add_function (&proc
->attr
, proc
->name
, NULL
);
551 fas
= ns
->entries
->sym
->as
;
552 fas
= fas
? fas
: ns
->entries
->sym
->result
->as
;
553 fts
= &ns
->entries
->sym
->result
->ts
;
554 if (fts
->type
== BT_UNKNOWN
)
555 fts
= gfc_get_default_type (ns
->entries
->sym
->result
->name
, NULL
);
556 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
558 ts
= &el
->sym
->result
->ts
;
560 as
= as
? as
: el
->sym
->result
->as
;
561 if (ts
->type
== BT_UNKNOWN
)
562 ts
= gfc_get_default_type (el
->sym
->result
->name
, NULL
);
564 if (! gfc_compare_types (ts
, fts
)
565 || (el
->sym
->result
->attr
.dimension
566 != ns
->entries
->sym
->result
->attr
.dimension
)
567 || (el
->sym
->result
->attr
.pointer
568 != ns
->entries
->sym
->result
->attr
.pointer
))
570 else if (as
&& fas
&& ns
->entries
->sym
->result
!= el
->sym
->result
571 && gfc_compare_array_spec (as
, fas
) == 0)
572 gfc_error ("Function %s at %L has entries with mismatched "
573 "array specifications", ns
->entries
->sym
->name
,
574 &ns
->entries
->sym
->declared_at
);
575 /* The characteristics need to match and thus both need to have
576 the same string length, i.e. both len=*, or both len=4.
577 Having both len=<variable> is also possible, but difficult to
578 check at compile time. */
579 else if (ts
->type
== BT_CHARACTER
&& ts
->u
.cl
&& fts
->u
.cl
580 && (((ts
->u
.cl
->length
&& !fts
->u
.cl
->length
)
581 ||(!ts
->u
.cl
->length
&& fts
->u
.cl
->length
))
583 && ts
->u
.cl
->length
->expr_type
584 != fts
->u
.cl
->length
->expr_type
)
586 && ts
->u
.cl
->length
->expr_type
== EXPR_CONSTANT
587 && mpz_cmp (ts
->u
.cl
->length
->value
.integer
,
588 fts
->u
.cl
->length
->value
.integer
) != 0)))
589 gfc_notify_std (GFC_STD_GNU
, "Extension: Function %s at %L with "
590 "entries returning variables of different "
591 "string lengths", ns
->entries
->sym
->name
,
592 &ns
->entries
->sym
->declared_at
);
597 sym
= ns
->entries
->sym
->result
;
598 /* All result types the same. */
600 if (sym
->attr
.dimension
)
601 gfc_set_array_spec (proc
, gfc_copy_array_spec (sym
->as
), NULL
);
602 if (sym
->attr
.pointer
)
603 gfc_add_pointer (&proc
->attr
, NULL
);
607 /* Otherwise the result will be passed through a union by
609 proc
->attr
.mixed_entry_master
= 1;
610 for (el
= ns
->entries
; el
; el
= el
->next
)
612 sym
= el
->sym
->result
;
613 if (sym
->attr
.dimension
)
615 if (el
== ns
->entries
)
616 gfc_error ("FUNCTION result %s can't be an array in "
617 "FUNCTION %s at %L", sym
->name
,
618 ns
->entries
->sym
->name
, &sym
->declared_at
);
620 gfc_error ("ENTRY result %s can't be an array in "
621 "FUNCTION %s at %L", sym
->name
,
622 ns
->entries
->sym
->name
, &sym
->declared_at
);
624 else if (sym
->attr
.pointer
)
626 if (el
== ns
->entries
)
627 gfc_error ("FUNCTION result %s can't be a POINTER in "
628 "FUNCTION %s at %L", sym
->name
,
629 ns
->entries
->sym
->name
, &sym
->declared_at
);
631 gfc_error ("ENTRY result %s can't be a POINTER in "
632 "FUNCTION %s at %L", sym
->name
,
633 ns
->entries
->sym
->name
, &sym
->declared_at
);
638 if (ts
->type
== BT_UNKNOWN
)
639 ts
= gfc_get_default_type (sym
->name
, NULL
);
643 if (ts
->kind
== gfc_default_integer_kind
)
647 if (ts
->kind
== gfc_default_real_kind
648 || ts
->kind
== gfc_default_double_kind
)
652 if (ts
->kind
== gfc_default_complex_kind
)
656 if (ts
->kind
== gfc_default_logical_kind
)
660 /* We will issue error elsewhere. */
668 if (el
== ns
->entries
)
669 gfc_error ("FUNCTION result %s can't be of type %s "
670 "in FUNCTION %s at %L", sym
->name
,
671 gfc_typename (ts
), ns
->entries
->sym
->name
,
674 gfc_error ("ENTRY result %s can't be of type %s "
675 "in FUNCTION %s at %L", sym
->name
,
676 gfc_typename (ts
), ns
->entries
->sym
->name
,
683 proc
->attr
.access
= ACCESS_PRIVATE
;
684 proc
->attr
.entry_master
= 1;
686 /* Merge all the entry point arguments. */
687 for (el
= ns
->entries
; el
; el
= el
->next
)
688 merge_argument_lists (proc
, el
->sym
->formal
);
690 /* Check the master formal arguments for any that are not
691 present in all entry points. */
692 for (el
= ns
->entries
; el
; el
= el
->next
)
693 check_argument_lists (proc
, el
->sym
->formal
);
695 /* Use the master function for the function body. */
696 ns
->proc_name
= proc
;
698 /* Finalize the new symbols. */
699 gfc_commit_symbols ();
701 /* Restore the original namespace. */
702 gfc_current_ns
= old_ns
;
706 /* Resolve common variables. */
708 resolve_common_vars (gfc_symbol
*sym
, bool named_common
)
710 gfc_symbol
*csym
= sym
;
712 for (; csym
; csym
= csym
->common_next
)
714 if (csym
->value
|| csym
->attr
.data
)
716 if (!csym
->ns
->is_block_data
)
717 gfc_notify_std (GFC_STD_GNU
, "Variable '%s' at %L is in COMMON "
718 "but only in BLOCK DATA initialization is "
719 "allowed", csym
->name
, &csym
->declared_at
);
720 else if (!named_common
)
721 gfc_notify_std (GFC_STD_GNU
, "Initialized variable '%s' at %L is "
722 "in a blank COMMON but initialization is only "
723 "allowed in named common blocks", csym
->name
,
727 if (csym
->ts
.type
!= BT_DERIVED
)
730 if (!(csym
->ts
.u
.derived
->attr
.sequence
731 || csym
->ts
.u
.derived
->attr
.is_bind_c
))
732 gfc_error_now ("Derived type variable '%s' in COMMON at %L "
733 "has neither the SEQUENCE nor the BIND(C) "
734 "attribute", csym
->name
, &csym
->declared_at
);
735 if (csym
->ts
.u
.derived
->attr
.alloc_comp
)
736 gfc_error_now ("Derived type variable '%s' in COMMON at %L "
737 "has an ultimate component that is "
738 "allocatable", csym
->name
, &csym
->declared_at
);
739 if (gfc_has_default_initializer (csym
->ts
.u
.derived
))
740 gfc_error_now ("Derived type variable '%s' in COMMON at %L "
741 "may not have default initializer", csym
->name
,
744 if (csym
->attr
.flavor
== FL_UNKNOWN
&& !csym
->attr
.proc_pointer
)
745 gfc_add_flavor (&csym
->attr
, FL_VARIABLE
, csym
->name
, &csym
->declared_at
);
749 /* Resolve common blocks. */
751 resolve_common_blocks (gfc_symtree
*common_root
)
755 if (common_root
== NULL
)
758 if (common_root
->left
)
759 resolve_common_blocks (common_root
->left
);
760 if (common_root
->right
)
761 resolve_common_blocks (common_root
->right
);
763 resolve_common_vars (common_root
->n
.common
->head
, true);
765 gfc_find_symbol (common_root
->name
, gfc_current_ns
, 0, &sym
);
769 if (sym
->attr
.flavor
== FL_PARAMETER
)
770 gfc_error ("COMMON block '%s' at %L is used as PARAMETER at %L",
771 sym
->name
, &common_root
->n
.common
->where
, &sym
->declared_at
);
773 if (sym
->attr
.intrinsic
)
774 gfc_error ("COMMON block '%s' at %L is also an intrinsic procedure",
775 sym
->name
, &common_root
->n
.common
->where
);
776 else if (sym
->attr
.result
777 || gfc_is_function_return_value (sym
, gfc_current_ns
))
778 gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: COMMON block '%s' at %L "
779 "that is also a function result", sym
->name
,
780 &common_root
->n
.common
->where
);
781 else if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.proc
!= PROC_INTERNAL
782 && sym
->attr
.proc
!= PROC_ST_FUNCTION
)
783 gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: COMMON block '%s' at %L "
784 "that is also a global procedure", sym
->name
,
785 &common_root
->n
.common
->where
);
789 /* Resolve contained function types. Because contained functions can call one
790 another, they have to be worked out before any of the contained procedures
793 The good news is that if a function doesn't already have a type, the only
794 way it can get one is through an IMPLICIT type or a RESULT variable, because
795 by definition contained functions are contained namespace they're contained
796 in, not in a sibling or parent namespace. */
799 resolve_contained_functions (gfc_namespace
*ns
)
801 gfc_namespace
*child
;
804 resolve_formal_arglists (ns
);
806 for (child
= ns
->contained
; child
; child
= child
->sibling
)
808 /* Resolve alternate entry points first. */
809 resolve_entries (child
);
811 /* Then check function return types. */
812 resolve_contained_fntype (child
->proc_name
, child
);
813 for (el
= child
->entries
; el
; el
= el
->next
)
814 resolve_contained_fntype (el
->sym
, child
);
819 /* Resolve all of the elements of a structure constructor and make sure that
820 the types are correct. */
823 resolve_structure_cons (gfc_expr
*expr
)
825 gfc_constructor
*cons
;
831 cons
= gfc_constructor_first (expr
->value
.constructor
);
832 /* A constructor may have references if it is the result of substituting a
833 parameter variable. In this case we just pull out the component we
836 comp
= expr
->ref
->u
.c
.sym
->components
;
838 comp
= expr
->ts
.u
.derived
->components
;
840 /* See if the user is trying to invoke a structure constructor for one of
841 the iso_c_binding derived types. */
842 if (expr
->ts
.type
== BT_DERIVED
&& expr
->ts
.u
.derived
843 && expr
->ts
.u
.derived
->ts
.is_iso_c
&& cons
844 && (cons
->expr
== NULL
|| cons
->expr
->expr_type
!= EXPR_NULL
))
846 gfc_error ("Components of structure constructor '%s' at %L are PRIVATE",
847 expr
->ts
.u
.derived
->name
, &(expr
->where
));
851 /* Return if structure constructor is c_null_(fun)prt. */
852 if (expr
->ts
.type
== BT_DERIVED
&& expr
->ts
.u
.derived
853 && expr
->ts
.u
.derived
->ts
.is_iso_c
&& cons
854 && cons
->expr
&& cons
->expr
->expr_type
== EXPR_NULL
)
857 for (; comp
&& cons
; comp
= comp
->next
, cons
= gfc_constructor_next (cons
))
864 if (gfc_resolve_expr (cons
->expr
) == FAILURE
)
870 rank
= comp
->as
? comp
->as
->rank
: 0;
871 if (cons
->expr
->expr_type
!= EXPR_NULL
&& rank
!= cons
->expr
->rank
872 && (comp
->attr
.allocatable
|| cons
->expr
->rank
))
874 gfc_error ("The rank of the element in the derived type "
875 "constructor at %L does not match that of the "
876 "component (%d/%d)", &cons
->expr
->where
,
877 cons
->expr
->rank
, rank
);
881 /* If we don't have the right type, try to convert it. */
883 if (!gfc_compare_types (&cons
->expr
->ts
, &comp
->ts
))
886 if (strcmp (comp
->name
, "$extends") == 0)
888 /* Can afford to be brutal with the $extends initializer.
889 The derived type can get lost because it is PRIVATE
890 but it is not usage constrained by the standard. */
891 cons
->expr
->ts
= comp
->ts
;
894 else if (comp
->attr
.pointer
&& cons
->expr
->ts
.type
!= BT_UNKNOWN
)
895 gfc_error ("The element in the derived type constructor at %L, "
896 "for pointer component '%s', is %s but should be %s",
897 &cons
->expr
->where
, comp
->name
,
898 gfc_basic_typename (cons
->expr
->ts
.type
),
899 gfc_basic_typename (comp
->ts
.type
));
901 t
= gfc_convert_type (cons
->expr
, &comp
->ts
, 1);
904 if (cons
->expr
->expr_type
== EXPR_NULL
905 && !(comp
->attr
.pointer
|| comp
->attr
.allocatable
906 || comp
->attr
.proc_pointer
907 || (comp
->ts
.type
== BT_CLASS
908 && (CLASS_DATA (comp
)->attr
.pointer
909 || CLASS_DATA (comp
)->attr
.allocatable
))))
912 gfc_error ("The NULL in the derived type constructor at %L is "
913 "being applied to component '%s', which is neither "
914 "a POINTER nor ALLOCATABLE", &cons
->expr
->where
,
918 if (!comp
->attr
.pointer
|| cons
->expr
->expr_type
== EXPR_NULL
)
921 a
= gfc_expr_attr (cons
->expr
);
923 if (!a
.pointer
&& !a
.target
)
926 gfc_error ("The element in the derived type constructor at %L, "
927 "for pointer component '%s' should be a POINTER or "
928 "a TARGET", &cons
->expr
->where
, comp
->name
);
931 /* F2003, C1272 (3). */
932 if (gfc_pure (NULL
) && cons
->expr
->expr_type
== EXPR_VARIABLE
933 && (gfc_impure_variable (cons
->expr
->symtree
->n
.sym
)
934 || gfc_is_coindexed (cons
->expr
)))
937 gfc_error ("Invalid expression in the derived type constructor for "
938 "pointer component '%s' at %L in PURE procedure",
939 comp
->name
, &cons
->expr
->where
);
947 /****************** Expression name resolution ******************/
949 /* Returns 0 if a symbol was not declared with a type or
950 attribute declaration statement, nonzero otherwise. */
953 was_declared (gfc_symbol
*sym
)
959 if (!a
.implicit_type
&& sym
->ts
.type
!= BT_UNKNOWN
)
962 if (a
.allocatable
|| a
.dimension
|| a
.dummy
|| a
.external
|| a
.intrinsic
963 || a
.optional
|| a
.pointer
|| a
.save
|| a
.target
|| a
.volatile_
964 || a
.value
|| a
.access
!= ACCESS_UNKNOWN
|| a
.intent
!= INTENT_UNKNOWN
965 || a
.asynchronous
|| a
.codimension
)
972 /* Determine if a symbol is generic or not. */
975 generic_sym (gfc_symbol
*sym
)
979 if (sym
->attr
.generic
||
980 (sym
->attr
.intrinsic
&& gfc_generic_intrinsic (sym
->name
)))
983 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
986 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
993 return generic_sym (s
);
1000 /* Determine if a symbol is specific or not. */
1003 specific_sym (gfc_symbol
*sym
)
1007 if (sym
->attr
.if_source
== IFSRC_IFBODY
1008 || sym
->attr
.proc
== PROC_MODULE
1009 || sym
->attr
.proc
== PROC_INTERNAL
1010 || sym
->attr
.proc
== PROC_ST_FUNCTION
1011 || (sym
->attr
.intrinsic
&& gfc_specific_intrinsic (sym
->name
))
1012 || sym
->attr
.external
)
1015 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1018 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1020 return (s
== NULL
) ? 0 : specific_sym (s
);
1024 /* Figure out if the procedure is specific, generic or unknown. */
1027 { PTYPE_GENERIC
= 1, PTYPE_SPECIFIC
, PTYPE_UNKNOWN
}
1031 procedure_kind (gfc_symbol
*sym
)
1033 if (generic_sym (sym
))
1034 return PTYPE_GENERIC
;
1036 if (specific_sym (sym
))
1037 return PTYPE_SPECIFIC
;
1039 return PTYPE_UNKNOWN
;
1042 /* Check references to assumed size arrays. The flag need_full_assumed_size
1043 is nonzero when matching actual arguments. */
1045 static int need_full_assumed_size
= 0;
1048 check_assumed_size_reference (gfc_symbol
*sym
, gfc_expr
*e
)
1050 if (need_full_assumed_size
|| !(sym
->as
&& sym
->as
->type
== AS_ASSUMED_SIZE
))
1053 /* FIXME: The comparison "e->ref->u.ar.type == AR_FULL" is wrong.
1054 What should it be? */
1055 if ((e
->ref
->u
.ar
.end
[e
->ref
->u
.ar
.as
->rank
- 1] == NULL
)
1056 && (e
->ref
->u
.ar
.as
->type
== AS_ASSUMED_SIZE
)
1057 && (e
->ref
->u
.ar
.type
== AR_FULL
))
1059 gfc_error ("The upper bound in the last dimension must "
1060 "appear in the reference to the assumed size "
1061 "array '%s' at %L", sym
->name
, &e
->where
);
1068 /* Look for bad assumed size array references in argument expressions
1069 of elemental and array valued intrinsic procedures. Since this is
1070 called from procedure resolution functions, it only recurses at
1074 resolve_assumed_size_actual (gfc_expr
*e
)
1079 switch (e
->expr_type
)
1082 if (e
->symtree
&& check_assumed_size_reference (e
->symtree
->n
.sym
, e
))
1087 if (resolve_assumed_size_actual (e
->value
.op
.op1
)
1088 || resolve_assumed_size_actual (e
->value
.op
.op2
))
1099 /* Check a generic procedure, passed as an actual argument, to see if
1100 there is a matching specific name. If none, it is an error, and if
1101 more than one, the reference is ambiguous. */
1103 count_specific_procs (gfc_expr
*e
)
1110 sym
= e
->symtree
->n
.sym
;
1112 for (p
= sym
->generic
; p
; p
= p
->next
)
1113 if (strcmp (sym
->name
, p
->sym
->name
) == 0)
1115 e
->symtree
= gfc_find_symtree (p
->sym
->ns
->sym_root
,
1121 gfc_error ("'%s' at %L is ambiguous", e
->symtree
->n
.sym
->name
,
1125 gfc_error ("GENERIC procedure '%s' is not allowed as an actual "
1126 "argument at %L", sym
->name
, &e
->where
);
1132 /* See if a call to sym could possibly be a not allowed RECURSION because of
1133 a missing RECURIVE declaration. This means that either sym is the current
1134 context itself, or sym is the parent of a contained procedure calling its
1135 non-RECURSIVE containing procedure.
1136 This also works if sym is an ENTRY. */
1139 is_illegal_recursion (gfc_symbol
* sym
, gfc_namespace
* context
)
1141 gfc_symbol
* proc_sym
;
1142 gfc_symbol
* context_proc
;
1143 gfc_namespace
* real_context
;
1145 if (sym
->attr
.flavor
== FL_PROGRAM
)
1148 gcc_assert (sym
->attr
.flavor
== FL_PROCEDURE
);
1150 /* If we've got an ENTRY, find real procedure. */
1151 if (sym
->attr
.entry
&& sym
->ns
->entries
)
1152 proc_sym
= sym
->ns
->entries
->sym
;
1156 /* If sym is RECURSIVE, all is well of course. */
1157 if (proc_sym
->attr
.recursive
|| gfc_option
.flag_recursive
)
1160 /* Find the context procedure's "real" symbol if it has entries.
1161 We look for a procedure symbol, so recurse on the parents if we don't
1162 find one (like in case of a BLOCK construct). */
1163 for (real_context
= context
; ; real_context
= real_context
->parent
)
1165 /* We should find something, eventually! */
1166 gcc_assert (real_context
);
1168 context_proc
= (real_context
->entries
? real_context
->entries
->sym
1169 : real_context
->proc_name
);
1171 /* In some special cases, there may not be a proc_name, like for this
1173 real(bad_kind()) function foo () ...
1174 when checking the call to bad_kind ().
1175 In these cases, we simply return here and assume that the
1180 if (context_proc
->attr
.flavor
!= FL_LABEL
)
1184 /* A call from sym's body to itself is recursion, of course. */
1185 if (context_proc
== proc_sym
)
1188 /* The same is true if context is a contained procedure and sym the
1190 if (context_proc
->attr
.contained
)
1192 gfc_symbol
* parent_proc
;
1194 gcc_assert (context
->parent
);
1195 parent_proc
= (context
->parent
->entries
? context
->parent
->entries
->sym
1196 : context
->parent
->proc_name
);
1198 if (parent_proc
== proc_sym
)
1206 /* Resolve an intrinsic procedure: Set its function/subroutine attribute,
1207 its typespec and formal argument list. */
1210 resolve_intrinsic (gfc_symbol
*sym
, locus
*loc
)
1212 gfc_intrinsic_sym
* isym
;
1218 /* We already know this one is an intrinsic, so we don't call
1219 gfc_is_intrinsic for full checking but rather use gfc_find_function and
1220 gfc_find_subroutine directly to check whether it is a function or
1223 if ((isym
= gfc_find_function (sym
->name
)))
1225 if (sym
->ts
.type
!= BT_UNKNOWN
&& gfc_option
.warn_surprising
1226 && !sym
->attr
.implicit_type
)
1227 gfc_warning ("Type specified for intrinsic function '%s' at %L is"
1228 " ignored", sym
->name
, &sym
->declared_at
);
1230 if (!sym
->attr
.function
&&
1231 gfc_add_function (&sym
->attr
, sym
->name
, loc
) == FAILURE
)
1236 else if ((isym
= gfc_find_subroutine (sym
->name
)))
1238 if (sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.implicit_type
)
1240 gfc_error ("Intrinsic subroutine '%s' at %L shall not have a type"
1241 " specifier", sym
->name
, &sym
->declared_at
);
1245 if (!sym
->attr
.subroutine
&&
1246 gfc_add_subroutine (&sym
->attr
, sym
->name
, loc
) == FAILURE
)
1251 gfc_error ("'%s' declared INTRINSIC at %L does not exist", sym
->name
,
1256 gfc_copy_formal_args_intr (sym
, isym
);
1258 /* Check it is actually available in the standard settings. */
1259 if (gfc_check_intrinsic_standard (isym
, &symstd
, false, sym
->declared_at
)
1262 gfc_error ("The intrinsic '%s' declared INTRINSIC at %L is not"
1263 " available in the current standard settings but %s. Use"
1264 " an appropriate -std=* option or enable -fall-intrinsics"
1265 " in order to use it.",
1266 sym
->name
, &sym
->declared_at
, symstd
);
1274 /* Resolve a procedure expression, like passing it to a called procedure or as
1275 RHS for a procedure pointer assignment. */
1278 resolve_procedure_expression (gfc_expr
* expr
)
1282 if (expr
->expr_type
!= EXPR_VARIABLE
)
1284 gcc_assert (expr
->symtree
);
1286 sym
= expr
->symtree
->n
.sym
;
1288 if (sym
->attr
.intrinsic
)
1289 resolve_intrinsic (sym
, &expr
->where
);
1291 if (sym
->attr
.flavor
!= FL_PROCEDURE
1292 || (sym
->attr
.function
&& sym
->result
== sym
))
1295 /* A non-RECURSIVE procedure that is used as procedure expression within its
1296 own body is in danger of being called recursively. */
1297 if (is_illegal_recursion (sym
, gfc_current_ns
))
1298 gfc_warning ("Non-RECURSIVE procedure '%s' at %L is possibly calling"
1299 " itself recursively. Declare it RECURSIVE or use"
1300 " -frecursive", sym
->name
, &expr
->where
);
1306 /* Resolve an actual argument list. Most of the time, this is just
1307 resolving the expressions in the list.
1308 The exception is that we sometimes have to decide whether arguments
1309 that look like procedure arguments are really simple variable
1313 resolve_actual_arglist (gfc_actual_arglist
*arg
, procedure_type ptype
,
1314 bool no_formal_args
)
1317 gfc_symtree
*parent_st
;
1319 int save_need_full_assumed_size
;
1320 gfc_component
*comp
;
1322 for (; arg
; arg
= arg
->next
)
1327 /* Check the label is a valid branching target. */
1330 if (arg
->label
->defined
== ST_LABEL_UNKNOWN
)
1332 gfc_error ("Label %d referenced at %L is never defined",
1333 arg
->label
->value
, &arg
->label
->where
);
1340 if (gfc_is_proc_ptr_comp (e
, &comp
))
1343 if (e
->expr_type
== EXPR_PPC
)
1345 if (comp
->as
!= NULL
)
1346 e
->rank
= comp
->as
->rank
;
1347 e
->expr_type
= EXPR_FUNCTION
;
1349 if (gfc_resolve_expr (e
) == FAILURE
)
1354 if (e
->expr_type
== EXPR_VARIABLE
1355 && e
->symtree
->n
.sym
->attr
.generic
1357 && count_specific_procs (e
) != 1)
1360 if (e
->ts
.type
!= BT_PROCEDURE
)
1362 save_need_full_assumed_size
= need_full_assumed_size
;
1363 if (e
->expr_type
!= EXPR_VARIABLE
)
1364 need_full_assumed_size
= 0;
1365 if (gfc_resolve_expr (e
) != SUCCESS
)
1367 need_full_assumed_size
= save_need_full_assumed_size
;
1371 /* See if the expression node should really be a variable reference. */
1373 sym
= e
->symtree
->n
.sym
;
1375 if (sym
->attr
.flavor
== FL_PROCEDURE
1376 || sym
->attr
.intrinsic
1377 || sym
->attr
.external
)
1381 /* If a procedure is not already determined to be something else
1382 check if it is intrinsic. */
1383 if (!sym
->attr
.intrinsic
1384 && !(sym
->attr
.external
|| sym
->attr
.use_assoc
1385 || sym
->attr
.if_source
== IFSRC_IFBODY
)
1386 && gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, e
->where
))
1387 sym
->attr
.intrinsic
= 1;
1389 if (sym
->attr
.proc
== PROC_ST_FUNCTION
)
1391 gfc_error ("Statement function '%s' at %L is not allowed as an "
1392 "actual argument", sym
->name
, &e
->where
);
1395 actual_ok
= gfc_intrinsic_actual_ok (sym
->name
,
1396 sym
->attr
.subroutine
);
1397 if (sym
->attr
.intrinsic
&& actual_ok
== 0)
1399 gfc_error ("Intrinsic '%s' at %L is not allowed as an "
1400 "actual argument", sym
->name
, &e
->where
);
1403 if (sym
->attr
.contained
&& !sym
->attr
.use_assoc
1404 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
1406 gfc_error ("Internal procedure '%s' is not allowed as an "
1407 "actual argument at %L", sym
->name
, &e
->where
);
1410 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
)
1412 gfc_error ("ELEMENTAL non-INTRINSIC procedure '%s' is not "
1413 "allowed as an actual argument at %L", sym
->name
,
1417 /* Check if a generic interface has a specific procedure
1418 with the same name before emitting an error. */
1419 if (sym
->attr
.generic
&& count_specific_procs (e
) != 1)
1422 /* Just in case a specific was found for the expression. */
1423 sym
= e
->symtree
->n
.sym
;
1425 /* If the symbol is the function that names the current (or
1426 parent) scope, then we really have a variable reference. */
1428 if (gfc_is_function_return_value (sym
, sym
->ns
))
1431 /* If all else fails, see if we have a specific intrinsic. */
1432 if (sym
->ts
.type
== BT_UNKNOWN
&& sym
->attr
.intrinsic
)
1434 gfc_intrinsic_sym
*isym
;
1436 isym
= gfc_find_function (sym
->name
);
1437 if (isym
== NULL
|| !isym
->specific
)
1439 gfc_error ("Unable to find a specific INTRINSIC procedure "
1440 "for the reference '%s' at %L", sym
->name
,
1445 sym
->attr
.intrinsic
= 1;
1446 sym
->attr
.function
= 1;
1449 if (gfc_resolve_expr (e
) == FAILURE
)
1454 /* See if the name is a module procedure in a parent unit. */
1456 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1459 if (gfc_find_sym_tree (sym
->name
, sym
->ns
->parent
, 1, &parent_st
))
1461 gfc_error ("Symbol '%s' at %L is ambiguous", sym
->name
, &e
->where
);
1465 if (parent_st
== NULL
)
1468 sym
= parent_st
->n
.sym
;
1469 e
->symtree
= parent_st
; /* Point to the right thing. */
1471 if (sym
->attr
.flavor
== FL_PROCEDURE
1472 || sym
->attr
.intrinsic
1473 || sym
->attr
.external
)
1475 if (gfc_resolve_expr (e
) == FAILURE
)
1481 e
->expr_type
= EXPR_VARIABLE
;
1483 if (sym
->as
!= NULL
)
1485 e
->rank
= sym
->as
->rank
;
1486 e
->ref
= gfc_get_ref ();
1487 e
->ref
->type
= REF_ARRAY
;
1488 e
->ref
->u
.ar
.type
= AR_FULL
;
1489 e
->ref
->u
.ar
.as
= sym
->as
;
1492 /* Expressions are assigned a default ts.type of BT_PROCEDURE in
1493 primary.c (match_actual_arg). If above code determines that it
1494 is a variable instead, it needs to be resolved as it was not
1495 done at the beginning of this function. */
1496 save_need_full_assumed_size
= need_full_assumed_size
;
1497 if (e
->expr_type
!= EXPR_VARIABLE
)
1498 need_full_assumed_size
= 0;
1499 if (gfc_resolve_expr (e
) != SUCCESS
)
1501 need_full_assumed_size
= save_need_full_assumed_size
;
1504 /* Check argument list functions %VAL, %LOC and %REF. There is
1505 nothing to do for %REF. */
1506 if (arg
->name
&& arg
->name
[0] == '%')
1508 if (strncmp ("%VAL", arg
->name
, 4) == 0)
1510 if (e
->ts
.type
== BT_CHARACTER
|| e
->ts
.type
== BT_DERIVED
)
1512 gfc_error ("By-value argument at %L is not of numeric "
1519 gfc_error ("By-value argument at %L cannot be an array or "
1520 "an array section", &e
->where
);
1524 /* Intrinsics are still PROC_UNKNOWN here. However,
1525 since same file external procedures are not resolvable
1526 in gfortran, it is a good deal easier to leave them to
1528 if (ptype
!= PROC_UNKNOWN
1529 && ptype
!= PROC_DUMMY
1530 && ptype
!= PROC_EXTERNAL
1531 && ptype
!= PROC_MODULE
)
1533 gfc_error ("By-value argument at %L is not allowed "
1534 "in this context", &e
->where
);
1539 /* Statement functions have already been excluded above. */
1540 else if (strncmp ("%LOC", arg
->name
, 4) == 0
1541 && e
->ts
.type
== BT_PROCEDURE
)
1543 if (e
->symtree
->n
.sym
->attr
.proc
== PROC_INTERNAL
)
1545 gfc_error ("Passing internal procedure at %L by location "
1546 "not allowed", &e
->where
);
1552 /* Fortran 2008, C1237. */
1553 if (e
->expr_type
== EXPR_VARIABLE
&& gfc_is_coindexed (e
)
1554 && gfc_has_ultimate_pointer (e
))
1556 gfc_error ("Coindexed actual argument at %L with ultimate pointer "
1557 "component", &e
->where
);
1566 /* Do the checks of the actual argument list that are specific to elemental
1567 procedures. If called with c == NULL, we have a function, otherwise if
1568 expr == NULL, we have a subroutine. */
1571 resolve_elemental_actual (gfc_expr
*expr
, gfc_code
*c
)
1573 gfc_actual_arglist
*arg0
;
1574 gfc_actual_arglist
*arg
;
1575 gfc_symbol
*esym
= NULL
;
1576 gfc_intrinsic_sym
*isym
= NULL
;
1578 gfc_intrinsic_arg
*iformal
= NULL
;
1579 gfc_formal_arglist
*eformal
= NULL
;
1580 bool formal_optional
= false;
1581 bool set_by_optional
= false;
1585 /* Is this an elemental procedure? */
1586 if (expr
&& expr
->value
.function
.actual
!= NULL
)
1588 if (expr
->value
.function
.esym
!= NULL
1589 && expr
->value
.function
.esym
->attr
.elemental
)
1591 arg0
= expr
->value
.function
.actual
;
1592 esym
= expr
->value
.function
.esym
;
1594 else if (expr
->value
.function
.isym
!= NULL
1595 && expr
->value
.function
.isym
->elemental
)
1597 arg0
= expr
->value
.function
.actual
;
1598 isym
= expr
->value
.function
.isym
;
1603 else if (c
&& c
->ext
.actual
!= NULL
)
1605 arg0
= c
->ext
.actual
;
1607 if (c
->resolved_sym
)
1608 esym
= c
->resolved_sym
;
1610 esym
= c
->symtree
->n
.sym
;
1613 if (!esym
->attr
.elemental
)
1619 /* The rank of an elemental is the rank of its array argument(s). */
1620 for (arg
= arg0
; arg
; arg
= arg
->next
)
1622 if (arg
->expr
!= NULL
&& arg
->expr
->rank
> 0)
1624 rank
= arg
->expr
->rank
;
1625 if (arg
->expr
->expr_type
== EXPR_VARIABLE
1626 && arg
->expr
->symtree
->n
.sym
->attr
.optional
)
1627 set_by_optional
= true;
1629 /* Function specific; set the result rank and shape. */
1633 if (!expr
->shape
&& arg
->expr
->shape
)
1635 expr
->shape
= gfc_get_shape (rank
);
1636 for (i
= 0; i
< rank
; i
++)
1637 mpz_init_set (expr
->shape
[i
], arg
->expr
->shape
[i
]);
1644 /* If it is an array, it shall not be supplied as an actual argument
1645 to an elemental procedure unless an array of the same rank is supplied
1646 as an actual argument corresponding to a nonoptional dummy argument of
1647 that elemental procedure(12.4.1.5). */
1648 formal_optional
= false;
1650 iformal
= isym
->formal
;
1652 eformal
= esym
->formal
;
1654 for (arg
= arg0
; arg
; arg
= arg
->next
)
1658 if (eformal
->sym
&& eformal
->sym
->attr
.optional
)
1659 formal_optional
= true;
1660 eformal
= eformal
->next
;
1662 else if (isym
&& iformal
)
1664 if (iformal
->optional
)
1665 formal_optional
= true;
1666 iformal
= iformal
->next
;
1669 formal_optional
= true;
1671 if (pedantic
&& arg
->expr
!= NULL
1672 && arg
->expr
->expr_type
== EXPR_VARIABLE
1673 && arg
->expr
->symtree
->n
.sym
->attr
.optional
1676 && (set_by_optional
|| arg
->expr
->rank
!= rank
)
1677 && !(isym
&& isym
->id
== GFC_ISYM_CONVERSION
))
1679 gfc_warning ("'%s' at %L is an array and OPTIONAL; IF IT IS "
1680 "MISSING, it cannot be the actual argument of an "
1681 "ELEMENTAL procedure unless there is a non-optional "
1682 "argument with the same rank (12.4.1.5)",
1683 arg
->expr
->symtree
->n
.sym
->name
, &arg
->expr
->where
);
1688 for (arg
= arg0
; arg
; arg
= arg
->next
)
1690 if (arg
->expr
== NULL
|| arg
->expr
->rank
== 0)
1693 /* Being elemental, the last upper bound of an assumed size array
1694 argument must be present. */
1695 if (resolve_assumed_size_actual (arg
->expr
))
1698 /* Elemental procedure's array actual arguments must conform. */
1701 if (gfc_check_conformance (arg
->expr
, e
,
1702 "elemental procedure") == FAILURE
)
1709 /* INTENT(OUT) is only allowed for subroutines; if any actual argument
1710 is an array, the intent inout/out variable needs to be also an array. */
1711 if (rank
> 0 && esym
&& expr
== NULL
)
1712 for (eformal
= esym
->formal
, arg
= arg0
; arg
&& eformal
;
1713 arg
= arg
->next
, eformal
= eformal
->next
)
1714 if ((eformal
->sym
->attr
.intent
== INTENT_OUT
1715 || eformal
->sym
->attr
.intent
== INTENT_INOUT
)
1716 && arg
->expr
&& arg
->expr
->rank
== 0)
1718 gfc_error ("Actual argument at %L for INTENT(%s) dummy '%s' of "
1719 "ELEMENTAL subroutine '%s' is a scalar, but another "
1720 "actual argument is an array", &arg
->expr
->where
,
1721 (eformal
->sym
->attr
.intent
== INTENT_OUT
) ? "OUT"
1722 : "INOUT", eformal
->sym
->name
, esym
->name
);
1729 /* Go through each actual argument in ACTUAL and see if it can be
1730 implemented as an inlined, non-copying intrinsic. FNSYM is the
1731 function being called, or NULL if not known. */
1734 find_noncopying_intrinsics (gfc_symbol
*fnsym
, gfc_actual_arglist
*actual
)
1736 gfc_actual_arglist
*ap
;
1739 for (ap
= actual
; ap
; ap
= ap
->next
)
1741 && (expr
= gfc_get_noncopying_intrinsic_argument (ap
->expr
))
1742 && !gfc_check_fncall_dependency (expr
, INTENT_IN
, fnsym
, actual
,
1744 ap
->expr
->inline_noncopying_intrinsic
= 1;
1748 /* This function does the checking of references to global procedures
1749 as defined in sections 18.1 and 14.1, respectively, of the Fortran
1750 77 and 95 standards. It checks for a gsymbol for the name, making
1751 one if it does not already exist. If it already exists, then the
1752 reference being resolved must correspond to the type of gsymbol.
1753 Otherwise, the new symbol is equipped with the attributes of the
1754 reference. The corresponding code that is called in creating
1755 global entities is parse.c.
1757 In addition, for all but -std=legacy, the gsymbols are used to
1758 check the interfaces of external procedures from the same file.
1759 The namespace of the gsymbol is resolved and then, once this is
1760 done the interface is checked. */
1764 not_in_recursive (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
1766 if (!gsym_ns
->proc_name
->attr
.recursive
)
1769 if (sym
->ns
== gsym_ns
)
1772 if (sym
->ns
->parent
&& sym
->ns
->parent
== gsym_ns
)
1779 not_entry_self_reference (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
1781 if (gsym_ns
->entries
)
1783 gfc_entry_list
*entry
= gsym_ns
->entries
;
1785 for (; entry
; entry
= entry
->next
)
1787 if (strcmp (sym
->name
, entry
->sym
->name
) == 0)
1789 if (strcmp (gsym_ns
->proc_name
->name
,
1790 sym
->ns
->proc_name
->name
) == 0)
1794 && strcmp (gsym_ns
->proc_name
->name
,
1795 sym
->ns
->parent
->proc_name
->name
) == 0)
1804 resolve_global_procedure (gfc_symbol
*sym
, locus
*where
,
1805 gfc_actual_arglist
**actual
, int sub
)
1809 enum gfc_symbol_type type
;
1811 type
= sub
? GSYM_SUBROUTINE
: GSYM_FUNCTION
;
1813 gsym
= gfc_get_gsymbol (sym
->name
);
1815 if ((gsym
->type
!= GSYM_UNKNOWN
&& gsym
->type
!= type
))
1816 gfc_global_used (gsym
, where
);
1818 if (gfc_option
.flag_whole_file
1819 && sym
->attr
.if_source
== IFSRC_UNKNOWN
1820 && gsym
->type
!= GSYM_UNKNOWN
1822 && gsym
->ns
->resolved
!= -1
1823 && gsym
->ns
->proc_name
1824 && not_in_recursive (sym
, gsym
->ns
)
1825 && not_entry_self_reference (sym
, gsym
->ns
))
1827 /* Resolve the gsymbol namespace if needed. */
1828 if (!gsym
->ns
->resolved
)
1830 gfc_dt_list
*old_dt_list
;
1832 /* Stash away derived types so that the backend_decls do not
1834 old_dt_list
= gfc_derived_types
;
1835 gfc_derived_types
= NULL
;
1837 gfc_resolve (gsym
->ns
);
1839 /* Store the new derived types with the global namespace. */
1840 if (gfc_derived_types
)
1841 gsym
->ns
->derived_types
= gfc_derived_types
;
1843 /* Restore the derived types of this namespace. */
1844 gfc_derived_types
= old_dt_list
;
1847 /* Make sure that translation for the gsymbol occurs before
1848 the procedure currently being resolved. */
1849 ns
= gfc_global_ns_list
;
1850 for (; ns
&& ns
!= gsym
->ns
; ns
= ns
->sibling
)
1852 if (ns
->sibling
== gsym
->ns
)
1854 ns
->sibling
= gsym
->ns
->sibling
;
1855 gsym
->ns
->sibling
= gfc_global_ns_list
;
1856 gfc_global_ns_list
= gsym
->ns
;
1861 /* Differences in constant character lengths. */
1862 if (sym
->attr
.function
&& sym
->ts
.type
== BT_CHARACTER
)
1864 long int l1
= 0, l2
= 0;
1865 gfc_charlen
*cl1
= sym
->ts
.u
.cl
;
1866 gfc_charlen
*cl2
= gsym
->ns
->proc_name
->ts
.u
.cl
;
1869 && cl1
->length
!= NULL
1870 && cl1
->length
->expr_type
== EXPR_CONSTANT
)
1871 l1
= mpz_get_si (cl1
->length
->value
.integer
);
1874 && cl2
->length
!= NULL
1875 && cl2
->length
->expr_type
== EXPR_CONSTANT
)
1876 l2
= mpz_get_si (cl2
->length
->value
.integer
);
1878 if (l1
&& l2
&& l1
!= l2
)
1879 gfc_error ("Character length mismatch in return type of "
1880 "function '%s' at %L (%ld/%ld)", sym
->name
,
1881 &sym
->declared_at
, l1
, l2
);
1884 /* Type mismatch of function return type and expected type. */
1885 if (sym
->attr
.function
1886 && !gfc_compare_types (&sym
->ts
, &gsym
->ns
->proc_name
->ts
))
1887 gfc_error ("Return type mismatch of function '%s' at %L (%s/%s)",
1888 sym
->name
, &sym
->declared_at
, gfc_typename (&sym
->ts
),
1889 gfc_typename (&gsym
->ns
->proc_name
->ts
));
1891 if (gsym
->ns
->proc_name
->formal
)
1893 gfc_formal_arglist
*arg
= gsym
->ns
->proc_name
->formal
;
1894 for ( ; arg
; arg
= arg
->next
)
1897 /* F2003, 12.3.1.1 (2a); F2008, 12.4.2.2 (2a) */
1898 else if (arg
->sym
->attr
.allocatable
1899 || arg
->sym
->attr
.asynchronous
1900 || arg
->sym
->attr
.optional
1901 || arg
->sym
->attr
.pointer
1902 || arg
->sym
->attr
.target
1903 || arg
->sym
->attr
.value
1904 || arg
->sym
->attr
.volatile_
)
1906 gfc_error ("Dummy argument '%s' of procedure '%s' at %L "
1907 "has an attribute that requires an explicit "
1908 "interface for this procedure", arg
->sym
->name
,
1909 sym
->name
, &sym
->declared_at
);
1912 /* F2003, 12.3.1.1 (2b); F2008, 12.4.2.2 (2b) */
1913 else if (arg
->sym
&& arg
->sym
->as
1914 && arg
->sym
->as
->type
== AS_ASSUMED_SHAPE
)
1916 gfc_error ("Procedure '%s' at %L with assumed-shape dummy "
1917 "argument '%s' must have an explicit interface",
1918 sym
->name
, &sym
->declared_at
, arg
->sym
->name
);
1921 /* F2008, 12.4.2.2 (2c) */
1922 else if (arg
->sym
->attr
.codimension
)
1924 gfc_error ("Procedure '%s' at %L with coarray dummy argument "
1925 "'%s' must have an explicit interface",
1926 sym
->name
, &sym
->declared_at
, arg
->sym
->name
);
1929 /* F2003, 12.3.1.1 (2c); F2008, 12.4.2.2 (2d) */
1930 else if (false) /* TODO: is a parametrized derived type */
1932 gfc_error ("Procedure '%s' at %L with parametrized derived "
1933 "type argument '%s' must have an explicit "
1934 "interface", sym
->name
, &sym
->declared_at
,
1938 /* F2003, 12.3.1.1 (2d); F2008, 12.4.2.2 (2e) */
1939 else if (arg
->sym
->ts
.type
== BT_CLASS
)
1941 gfc_error ("Procedure '%s' at %L with polymorphic dummy "
1942 "argument '%s' must have an explicit interface",
1943 sym
->name
, &sym
->declared_at
, arg
->sym
->name
);
1948 if (gsym
->ns
->proc_name
->attr
.function
)
1950 /* F2003, 12.3.1.1 (3a); F2008, 12.4.2.2 (3a) */
1951 if (gsym
->ns
->proc_name
->as
1952 && gsym
->ns
->proc_name
->as
->rank
1953 && (!sym
->as
|| sym
->as
->rank
!= gsym
->ns
->proc_name
->as
->rank
))
1954 gfc_error ("The reference to function '%s' at %L either needs an "
1955 "explicit INTERFACE or the rank is incorrect", sym
->name
,
1958 /* F2003, 12.3.1.1 (3b); F2008, 12.4.2.2 (3b) */
1959 if (gsym
->ns
->proc_name
->result
->attr
.pointer
1960 || gsym
->ns
->proc_name
->result
->attr
.allocatable
)
1961 gfc_error ("Function '%s' at %L with a POINTER or ALLOCATABLE "
1962 "result must have an explicit interface", sym
->name
,
1965 /* F2003, 12.3.1.1 (3c); F2008, 12.4.2.2 (3c) */
1966 if (sym
->ts
.type
== BT_CHARACTER
1967 && gsym
->ns
->proc_name
->ts
.u
.cl
->length
!= NULL
)
1969 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
1971 if (!sym
->attr
.entry_master
&& sym
->attr
.if_source
== IFSRC_UNKNOWN
1972 && cl
&& cl
->length
&& cl
->length
->expr_type
!= EXPR_CONSTANT
)
1974 gfc_error ("Nonconstant character-length function '%s' at %L "
1975 "must have an explicit interface", sym
->name
,
1981 /* F2003, 12.3.1.1 (4); F2008, 12.4.2.2 (4) */
1982 if (gsym
->ns
->proc_name
->attr
.elemental
)
1984 gfc_error ("ELEMENTAL procedure '%s' at %L must have an explicit "
1985 "interface", sym
->name
, &sym
->declared_at
);
1988 /* F2003, 12.3.1.1 (5); F2008, 12.4.2.2 (5) */
1989 if (gsym
->ns
->proc_name
->attr
.is_bind_c
)
1991 gfc_error ("Procedure '%s' at %L with BIND(C) attribute must have "
1992 "an explicit interface", sym
->name
, &sym
->declared_at
);
1995 if (gfc_option
.flag_whole_file
== 1
1996 || ((gfc_option
.warn_std
& GFC_STD_LEGACY
)
1997 && !(gfc_option
.warn_std
& GFC_STD_GNU
)))
1998 gfc_errors_to_warnings (1);
2000 gfc_procedure_use (gsym
->ns
->proc_name
, actual
, where
);
2002 gfc_errors_to_warnings (0);
2005 if (gsym
->type
== GSYM_UNKNOWN
)
2008 gsym
->where
= *where
;
2015 /************* Function resolution *************/
2017 /* Resolve a function call known to be generic.
2018 Section 14.1.2.4.1. */
2021 resolve_generic_f0 (gfc_expr
*expr
, gfc_symbol
*sym
)
2025 if (sym
->attr
.generic
)
2027 s
= gfc_search_interface (sym
->generic
, 0, &expr
->value
.function
.actual
);
2030 expr
->value
.function
.name
= s
->name
;
2031 expr
->value
.function
.esym
= s
;
2033 if (s
->ts
.type
!= BT_UNKNOWN
)
2035 else if (s
->result
!= NULL
&& s
->result
->ts
.type
!= BT_UNKNOWN
)
2036 expr
->ts
= s
->result
->ts
;
2039 expr
->rank
= s
->as
->rank
;
2040 else if (s
->result
!= NULL
&& s
->result
->as
!= NULL
)
2041 expr
->rank
= s
->result
->as
->rank
;
2043 gfc_set_sym_referenced (expr
->value
.function
.esym
);
2048 /* TODO: Need to search for elemental references in generic
2052 if (sym
->attr
.intrinsic
)
2053 return gfc_intrinsic_func_interface (expr
, 0);
2060 resolve_generic_f (gfc_expr
*expr
)
2065 sym
= expr
->symtree
->n
.sym
;
2069 m
= resolve_generic_f0 (expr
, sym
);
2072 else if (m
== MATCH_ERROR
)
2076 if (sym
->ns
->parent
== NULL
)
2078 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2082 if (!generic_sym (sym
))
2086 /* Last ditch attempt. See if the reference is to an intrinsic
2087 that possesses a matching interface. 14.1.2.4 */
2088 if (sym
&& !gfc_is_intrinsic (sym
, 0, expr
->where
))
2090 gfc_error ("There is no specific function for the generic '%s' at %L",
2091 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2095 m
= gfc_intrinsic_func_interface (expr
, 0);
2099 gfc_error ("Generic function '%s' at %L is not consistent with a "
2100 "specific intrinsic interface", expr
->symtree
->n
.sym
->name
,
2107 /* Resolve a function call known to be specific. */
2110 resolve_specific_f0 (gfc_symbol
*sym
, gfc_expr
*expr
)
2114 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
2116 if (sym
->attr
.dummy
)
2118 sym
->attr
.proc
= PROC_DUMMY
;
2122 sym
->attr
.proc
= PROC_EXTERNAL
;
2126 if (sym
->attr
.proc
== PROC_MODULE
2127 || sym
->attr
.proc
== PROC_ST_FUNCTION
2128 || sym
->attr
.proc
== PROC_INTERNAL
)
2131 if (sym
->attr
.intrinsic
)
2133 m
= gfc_intrinsic_func_interface (expr
, 1);
2137 gfc_error ("Function '%s' at %L is INTRINSIC but is not compatible "
2138 "with an intrinsic", sym
->name
, &expr
->where
);
2146 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2149 expr
->ts
= sym
->result
->ts
;
2152 expr
->value
.function
.name
= sym
->name
;
2153 expr
->value
.function
.esym
= sym
;
2154 if (sym
->as
!= NULL
)
2155 expr
->rank
= sym
->as
->rank
;
2162 resolve_specific_f (gfc_expr
*expr
)
2167 sym
= expr
->symtree
->n
.sym
;
2171 m
= resolve_specific_f0 (sym
, expr
);
2174 if (m
== MATCH_ERROR
)
2177 if (sym
->ns
->parent
== NULL
)
2180 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2186 gfc_error ("Unable to resolve the specific function '%s' at %L",
2187 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2193 /* Resolve a procedure call not known to be generic nor specific. */
2196 resolve_unknown_f (gfc_expr
*expr
)
2201 sym
= expr
->symtree
->n
.sym
;
2203 if (sym
->attr
.dummy
)
2205 sym
->attr
.proc
= PROC_DUMMY
;
2206 expr
->value
.function
.name
= sym
->name
;
2210 /* See if we have an intrinsic function reference. */
2212 if (gfc_is_intrinsic (sym
, 0, expr
->where
))
2214 if (gfc_intrinsic_func_interface (expr
, 1) == MATCH_YES
)
2219 /* The reference is to an external name. */
2221 sym
->attr
.proc
= PROC_EXTERNAL
;
2222 expr
->value
.function
.name
= sym
->name
;
2223 expr
->value
.function
.esym
= expr
->symtree
->n
.sym
;
2225 if (sym
->as
!= NULL
)
2226 expr
->rank
= sym
->as
->rank
;
2228 /* Type of the expression is either the type of the symbol or the
2229 default type of the symbol. */
2232 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2234 if (sym
->ts
.type
!= BT_UNKNOWN
)
2238 ts
= gfc_get_default_type (sym
->name
, sym
->ns
);
2240 if (ts
->type
== BT_UNKNOWN
)
2242 gfc_error ("Function '%s' at %L has no IMPLICIT type",
2243 sym
->name
, &expr
->where
);
2254 /* Return true, if the symbol is an external procedure. */
2256 is_external_proc (gfc_symbol
*sym
)
2258 if (!sym
->attr
.dummy
&& !sym
->attr
.contained
2259 && !(sym
->attr
.intrinsic
2260 || gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, sym
->declared_at
))
2261 && sym
->attr
.proc
!= PROC_ST_FUNCTION
2262 && !sym
->attr
.proc_pointer
2263 && !sym
->attr
.use_assoc
2271 /* Figure out if a function reference is pure or not. Also set the name
2272 of the function for a potential error message. Return nonzero if the
2273 function is PURE, zero if not. */
2275 pure_stmt_function (gfc_expr
*, gfc_symbol
*);
2278 pure_function (gfc_expr
*e
, const char **name
)
2284 if (e
->symtree
!= NULL
2285 && e
->symtree
->n
.sym
!= NULL
2286 && e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
2287 return pure_stmt_function (e
, e
->symtree
->n
.sym
);
2289 if (e
->value
.function
.esym
)
2291 pure
= gfc_pure (e
->value
.function
.esym
);
2292 *name
= e
->value
.function
.esym
->name
;
2294 else if (e
->value
.function
.isym
)
2296 pure
= e
->value
.function
.isym
->pure
2297 || e
->value
.function
.isym
->elemental
;
2298 *name
= e
->value
.function
.isym
->name
;
2302 /* Implicit functions are not pure. */
2304 *name
= e
->value
.function
.name
;
2312 impure_stmt_fcn (gfc_expr
*e
, gfc_symbol
*sym
,
2313 int *f ATTRIBUTE_UNUSED
)
2317 /* Don't bother recursing into other statement functions
2318 since they will be checked individually for purity. */
2319 if (e
->expr_type
!= EXPR_FUNCTION
2321 || e
->symtree
->n
.sym
== sym
2322 || e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
2325 return pure_function (e
, &name
) ? false : true;
2330 pure_stmt_function (gfc_expr
*e
, gfc_symbol
*sym
)
2332 return gfc_traverse_expr (e
, sym
, impure_stmt_fcn
, 0) ? 0 : 1;
2337 is_scalar_expr_ptr (gfc_expr
*expr
)
2339 gfc_try retval
= SUCCESS
;
2344 /* See if we have a gfc_ref, which means we have a substring, array
2345 reference, or a component. */
2346 if (expr
->ref
!= NULL
)
2349 while (ref
->next
!= NULL
)
2355 if (ref
->u
.ss
.length
!= NULL
2356 && ref
->u
.ss
.length
->length
!= NULL
2358 && ref
->u
.ss
.start
->expr_type
== EXPR_CONSTANT
2360 && ref
->u
.ss
.end
->expr_type
== EXPR_CONSTANT
)
2362 start
= (int) mpz_get_si (ref
->u
.ss
.start
->value
.integer
);
2363 end
= (int) mpz_get_si (ref
->u
.ss
.end
->value
.integer
);
2364 if (end
- start
+ 1 != 1)
2371 if (ref
->u
.ar
.type
== AR_ELEMENT
)
2373 else if (ref
->u
.ar
.type
== AR_FULL
)
2375 /* The user can give a full array if the array is of size 1. */
2376 if (ref
->u
.ar
.as
!= NULL
2377 && ref
->u
.ar
.as
->rank
== 1
2378 && ref
->u
.ar
.as
->type
== AS_EXPLICIT
2379 && ref
->u
.ar
.as
->lower
[0] != NULL
2380 && ref
->u
.ar
.as
->lower
[0]->expr_type
== EXPR_CONSTANT
2381 && ref
->u
.ar
.as
->upper
[0] != NULL
2382 && ref
->u
.ar
.as
->upper
[0]->expr_type
== EXPR_CONSTANT
)
2384 /* If we have a character string, we need to check if
2385 its length is one. */
2386 if (expr
->ts
.type
== BT_CHARACTER
)
2388 if (expr
->ts
.u
.cl
== NULL
2389 || expr
->ts
.u
.cl
->length
== NULL
2390 || mpz_cmp_si (expr
->ts
.u
.cl
->length
->value
.integer
, 1)
2396 /* We have constant lower and upper bounds. If the
2397 difference between is 1, it can be considered a
2399 start
= (int) mpz_get_si
2400 (ref
->u
.ar
.as
->lower
[0]->value
.integer
);
2401 end
= (int) mpz_get_si
2402 (ref
->u
.ar
.as
->upper
[0]->value
.integer
);
2403 if (end
- start
+ 1 != 1)
2418 else if (expr
->ts
.type
== BT_CHARACTER
&& expr
->rank
== 0)
2420 /* Character string. Make sure it's of length 1. */
2421 if (expr
->ts
.u
.cl
== NULL
2422 || expr
->ts
.u
.cl
->length
== NULL
2423 || mpz_cmp_si (expr
->ts
.u
.cl
->length
->value
.integer
, 1) != 0)
2426 else if (expr
->rank
!= 0)
2433 /* Match one of the iso_c_binding functions (c_associated or c_loc)
2434 and, in the case of c_associated, set the binding label based on
2438 gfc_iso_c_func_interface (gfc_symbol
*sym
, gfc_actual_arglist
*args
,
2439 gfc_symbol
**new_sym
)
2441 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
2442 char binding_label
[GFC_MAX_BINDING_LABEL_LEN
+ 1];
2443 int optional_arg
= 0, is_pointer
= 0;
2444 gfc_try retval
= SUCCESS
;
2445 gfc_symbol
*args_sym
;
2446 gfc_typespec
*arg_ts
;
2448 if (args
->expr
->expr_type
== EXPR_CONSTANT
2449 || args
->expr
->expr_type
== EXPR_OP
2450 || args
->expr
->expr_type
== EXPR_NULL
)
2452 gfc_error ("Argument to '%s' at %L is not a variable",
2453 sym
->name
, &(args
->expr
->where
));
2457 args_sym
= args
->expr
->symtree
->n
.sym
;
2459 /* The typespec for the actual arg should be that stored in the expr
2460 and not necessarily that of the expr symbol (args_sym), because
2461 the actual expression could be a part-ref of the expr symbol. */
2462 arg_ts
= &(args
->expr
->ts
);
2464 is_pointer
= gfc_is_data_pointer (args
->expr
);
2466 if (sym
->intmod_sym_id
== ISOCBINDING_ASSOCIATED
)
2468 /* If the user gave two args then they are providing something for
2469 the optional arg (the second cptr). Therefore, set the name and
2470 binding label to the c_associated for two cptrs. Otherwise,
2471 set c_associated to expect one cptr. */
2475 sprintf (name
, "%s_2", sym
->name
);
2476 sprintf (binding_label
, "%s_2", sym
->binding_label
);
2482 sprintf (name
, "%s_1", sym
->name
);
2483 sprintf (binding_label
, "%s_1", sym
->binding_label
);
2487 /* Get a new symbol for the version of c_associated that
2489 *new_sym
= get_iso_c_sym (sym
, name
, binding_label
, optional_arg
);
2491 else if (sym
->intmod_sym_id
== ISOCBINDING_LOC
2492 || sym
->intmod_sym_id
== ISOCBINDING_FUNLOC
)
2494 sprintf (name
, "%s", sym
->name
);
2495 sprintf (binding_label
, "%s", sym
->binding_label
);
2497 /* Error check the call. */
2498 if (args
->next
!= NULL
)
2500 gfc_error_now ("More actual than formal arguments in '%s' "
2501 "call at %L", name
, &(args
->expr
->where
));
2504 else if (sym
->intmod_sym_id
== ISOCBINDING_LOC
)
2506 /* Make sure we have either the target or pointer attribute. */
2507 if (!args_sym
->attr
.target
&& !is_pointer
)
2509 gfc_error_now ("Parameter '%s' to '%s' at %L must be either "
2510 "a TARGET or an associated pointer",
2512 sym
->name
, &(args
->expr
->where
));
2516 /* See if we have interoperable type and type param. */
2517 if (verify_c_interop (arg_ts
) == SUCCESS
2518 || gfc_check_any_c_kind (arg_ts
) == SUCCESS
)
2520 if (args_sym
->attr
.target
== 1)
2522 /* Case 1a, section 15.1.2.5, J3/04-007: variable that
2523 has the target attribute and is interoperable. */
2524 /* Case 1b, section 15.1.2.5, J3/04-007: allocated
2525 allocatable variable that has the TARGET attribute and
2526 is not an array of zero size. */
2527 if (args_sym
->attr
.allocatable
== 1)
2529 if (args_sym
->attr
.dimension
!= 0
2530 && (args_sym
->as
&& args_sym
->as
->rank
== 0))
2532 gfc_error_now ("Allocatable variable '%s' used as a "
2533 "parameter to '%s' at %L must not be "
2534 "an array of zero size",
2535 args_sym
->name
, sym
->name
,
2536 &(args
->expr
->where
));
2542 /* A non-allocatable target variable with C
2543 interoperable type and type parameters must be
2545 if (args_sym
&& args_sym
->attr
.dimension
)
2547 if (args_sym
->as
->type
== AS_ASSUMED_SHAPE
)
2549 gfc_error ("Assumed-shape array '%s' at %L "
2550 "cannot be an argument to the "
2551 "procedure '%s' because "
2552 "it is not C interoperable",
2554 &(args
->expr
->where
), sym
->name
);
2557 else if (args_sym
->as
->type
== AS_DEFERRED
)
2559 gfc_error ("Deferred-shape array '%s' at %L "
2560 "cannot be an argument to the "
2561 "procedure '%s' because "
2562 "it is not C interoperable",
2564 &(args
->expr
->where
), sym
->name
);
2569 /* Make sure it's not a character string. Arrays of
2570 any type should be ok if the variable is of a C
2571 interoperable type. */
2572 if (arg_ts
->type
== BT_CHARACTER
)
2573 if (arg_ts
->u
.cl
!= NULL
2574 && (arg_ts
->u
.cl
->length
== NULL
2575 || arg_ts
->u
.cl
->length
->expr_type
2578 (arg_ts
->u
.cl
->length
->value
.integer
, 1)
2580 && is_scalar_expr_ptr (args
->expr
) != SUCCESS
)
2582 gfc_error_now ("CHARACTER argument '%s' to '%s' "
2583 "at %L must have a length of 1",
2584 args_sym
->name
, sym
->name
,
2585 &(args
->expr
->where
));
2591 && is_scalar_expr_ptr (args
->expr
) != SUCCESS
)
2593 /* Case 1c, section 15.1.2.5, J3/04-007: an associated
2595 gfc_error_now ("Argument '%s' to '%s' at %L must be an "
2596 "associated scalar POINTER", args_sym
->name
,
2597 sym
->name
, &(args
->expr
->where
));
2603 /* The parameter is not required to be C interoperable. If it
2604 is not C interoperable, it must be a nonpolymorphic scalar
2605 with no length type parameters. It still must have either
2606 the pointer or target attribute, and it can be
2607 allocatable (but must be allocated when c_loc is called). */
2608 if (args
->expr
->rank
!= 0
2609 && is_scalar_expr_ptr (args
->expr
) != SUCCESS
)
2611 gfc_error_now ("Parameter '%s' to '%s' at %L must be a "
2612 "scalar", args_sym
->name
, sym
->name
,
2613 &(args
->expr
->where
));
2616 else if (arg_ts
->type
== BT_CHARACTER
2617 && is_scalar_expr_ptr (args
->expr
) != SUCCESS
)
2619 gfc_error_now ("CHARACTER argument '%s' to '%s' at "
2620 "%L must have a length of 1",
2621 args_sym
->name
, sym
->name
,
2622 &(args
->expr
->where
));
2627 else if (sym
->intmod_sym_id
== ISOCBINDING_FUNLOC
)
2629 if (args_sym
->attr
.flavor
!= FL_PROCEDURE
)
2631 /* TODO: Update this error message to allow for procedure
2632 pointers once they are implemented. */
2633 gfc_error_now ("Parameter '%s' to '%s' at %L must be a "
2635 args_sym
->name
, sym
->name
,
2636 &(args
->expr
->where
));
2639 else if (args_sym
->attr
.is_bind_c
!= 1)
2641 gfc_error_now ("Parameter '%s' to '%s' at %L must be "
2643 args_sym
->name
, sym
->name
,
2644 &(args
->expr
->where
));
2649 /* for c_loc/c_funloc, the new symbol is the same as the old one */
2654 gfc_internal_error ("gfc_iso_c_func_interface(): Unhandled "
2655 "iso_c_binding function: '%s'!\n", sym
->name
);
2662 /* Resolve a function call, which means resolving the arguments, then figuring
2663 out which entity the name refers to. */
2664 /* TODO: Check procedure arguments so that an INTENT(IN) isn't passed
2665 to INTENT(OUT) or INTENT(INOUT). */
2668 resolve_function (gfc_expr
*expr
)
2670 gfc_actual_arglist
*arg
;
2675 procedure_type p
= PROC_INTRINSIC
;
2676 bool no_formal_args
;
2680 sym
= expr
->symtree
->n
.sym
;
2682 /* If this is a procedure pointer component, it has already been resolved. */
2683 if (gfc_is_proc_ptr_comp (expr
, NULL
))
2686 if (sym
&& sym
->attr
.intrinsic
2687 && resolve_intrinsic (sym
, &expr
->where
) == FAILURE
)
2690 if (sym
&& (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.subroutine
))
2692 gfc_error ("'%s' at %L is not a function", sym
->name
, &expr
->where
);
2696 /* If this ia a deferred TBP with an abstract interface (which may
2697 of course be referenced), expr->value.function.esym will be set. */
2698 if (sym
&& sym
->attr
.abstract
&& !expr
->value
.function
.esym
)
2700 gfc_error ("ABSTRACT INTERFACE '%s' must not be referenced at %L",
2701 sym
->name
, &expr
->where
);
2705 /* Switch off assumed size checking and do this again for certain kinds
2706 of procedure, once the procedure itself is resolved. */
2707 need_full_assumed_size
++;
2709 if (expr
->symtree
&& expr
->symtree
->n
.sym
)
2710 p
= expr
->symtree
->n
.sym
->attr
.proc
;
2712 if (expr
->value
.function
.isym
&& expr
->value
.function
.isym
->inquiry
)
2713 inquiry_argument
= true;
2714 no_formal_args
= sym
&& is_external_proc (sym
) && sym
->formal
== NULL
;
2716 if (resolve_actual_arglist (expr
->value
.function
.actual
,
2717 p
, no_formal_args
) == FAILURE
)
2719 inquiry_argument
= false;
2723 inquiry_argument
= false;
2725 /* Need to setup the call to the correct c_associated, depending on
2726 the number of cptrs to user gives to compare. */
2727 if (sym
&& sym
->attr
.is_iso_c
== 1)
2729 if (gfc_iso_c_func_interface (sym
, expr
->value
.function
.actual
, &sym
)
2733 /* Get the symtree for the new symbol (resolved func).
2734 the old one will be freed later, when it's no longer used. */
2735 gfc_find_sym_tree (sym
->name
, sym
->ns
, 1, &(expr
->symtree
));
2738 /* Resume assumed_size checking. */
2739 need_full_assumed_size
--;
2741 /* If the procedure is external, check for usage. */
2742 if (sym
&& is_external_proc (sym
))
2743 resolve_global_procedure (sym
, &expr
->where
,
2744 &expr
->value
.function
.actual
, 0);
2746 if (sym
&& sym
->ts
.type
== BT_CHARACTER
2748 && sym
->ts
.u
.cl
->length
== NULL
2750 && expr
->value
.function
.esym
== NULL
2751 && !sym
->attr
.contained
)
2753 /* Internal procedures are taken care of in resolve_contained_fntype. */
2754 gfc_error ("Function '%s' is declared CHARACTER(*) and cannot "
2755 "be used at %L since it is not a dummy argument",
2756 sym
->name
, &expr
->where
);
2760 /* See if function is already resolved. */
2762 if (expr
->value
.function
.name
!= NULL
)
2764 if (expr
->ts
.type
== BT_UNKNOWN
)
2770 /* Apply the rules of section 14.1.2. */
2772 switch (procedure_kind (sym
))
2775 t
= resolve_generic_f (expr
);
2778 case PTYPE_SPECIFIC
:
2779 t
= resolve_specific_f (expr
);
2783 t
= resolve_unknown_f (expr
);
2787 gfc_internal_error ("resolve_function(): bad function type");
2791 /* If the expression is still a function (it might have simplified),
2792 then we check to see if we are calling an elemental function. */
2794 if (expr
->expr_type
!= EXPR_FUNCTION
)
2797 temp
= need_full_assumed_size
;
2798 need_full_assumed_size
= 0;
2800 if (resolve_elemental_actual (expr
, NULL
) == FAILURE
)
2803 if (omp_workshare_flag
2804 && expr
->value
.function
.esym
2805 && ! gfc_elemental (expr
->value
.function
.esym
))
2807 gfc_error ("User defined non-ELEMENTAL function '%s' at %L not allowed "
2808 "in WORKSHARE construct", expr
->value
.function
.esym
->name
,
2813 #define GENERIC_ID expr->value.function.isym->id
2814 else if (expr
->value
.function
.actual
!= NULL
2815 && expr
->value
.function
.isym
!= NULL
2816 && GENERIC_ID
!= GFC_ISYM_LBOUND
2817 && GENERIC_ID
!= GFC_ISYM_LEN
2818 && GENERIC_ID
!= GFC_ISYM_LOC
2819 && GENERIC_ID
!= GFC_ISYM_PRESENT
)
2821 /* Array intrinsics must also have the last upper bound of an
2822 assumed size array argument. UBOUND and SIZE have to be
2823 excluded from the check if the second argument is anything
2826 for (arg
= expr
->value
.function
.actual
; arg
; arg
= arg
->next
)
2828 if ((GENERIC_ID
== GFC_ISYM_UBOUND
|| GENERIC_ID
== GFC_ISYM_SIZE
)
2829 && arg
->next
!= NULL
&& arg
->next
->expr
)
2831 if (arg
->next
->expr
->expr_type
!= EXPR_CONSTANT
)
2834 if (arg
->next
->name
&& strncmp(arg
->next
->name
, "kind", 4) == 0)
2837 if ((int)mpz_get_si (arg
->next
->expr
->value
.integer
)
2842 if (arg
->expr
!= NULL
2843 && arg
->expr
->rank
> 0
2844 && resolve_assumed_size_actual (arg
->expr
))
2850 need_full_assumed_size
= temp
;
2853 if (!pure_function (expr
, &name
) && name
)
2857 gfc_error ("reference to non-PURE function '%s' at %L inside a "
2858 "FORALL %s", name
, &expr
->where
,
2859 forall_flag
== 2 ? "mask" : "block");
2862 else if (gfc_pure (NULL
))
2864 gfc_error ("Function reference to '%s' at %L is to a non-PURE "
2865 "procedure within a PURE procedure", name
, &expr
->where
);
2870 /* Functions without the RECURSIVE attribution are not allowed to
2871 * call themselves. */
2872 if (expr
->value
.function
.esym
&& !expr
->value
.function
.esym
->attr
.recursive
)
2875 esym
= expr
->value
.function
.esym
;
2877 if (is_illegal_recursion (esym
, gfc_current_ns
))
2879 if (esym
->attr
.entry
&& esym
->ns
->entries
)
2880 gfc_error ("ENTRY '%s' at %L cannot be called recursively, as"
2881 " function '%s' is not RECURSIVE",
2882 esym
->name
, &expr
->where
, esym
->ns
->entries
->sym
->name
);
2884 gfc_error ("Function '%s' at %L cannot be called recursively, as it"
2885 " is not RECURSIVE", esym
->name
, &expr
->where
);
2891 /* Character lengths of use associated functions may contains references to
2892 symbols not referenced from the current program unit otherwise. Make sure
2893 those symbols are marked as referenced. */
2895 if (expr
->ts
.type
== BT_CHARACTER
&& expr
->value
.function
.esym
2896 && expr
->value
.function
.esym
->attr
.use_assoc
)
2898 gfc_expr_set_symbols_referenced (expr
->ts
.u
.cl
->length
);
2902 && !((expr
->value
.function
.esym
2903 && expr
->value
.function
.esym
->attr
.elemental
)
2905 (expr
->value
.function
.isym
2906 && expr
->value
.function
.isym
->elemental
)))
2907 find_noncopying_intrinsics (expr
->value
.function
.esym
,
2908 expr
->value
.function
.actual
);
2910 /* Make sure that the expression has a typespec that works. */
2911 if (expr
->ts
.type
== BT_UNKNOWN
)
2913 if (expr
->symtree
->n
.sym
->result
2914 && expr
->symtree
->n
.sym
->result
->ts
.type
!= BT_UNKNOWN
2915 && !expr
->symtree
->n
.sym
->result
->attr
.proc_pointer
)
2916 expr
->ts
= expr
->symtree
->n
.sym
->result
->ts
;
2923 /************* Subroutine resolution *************/
2926 pure_subroutine (gfc_code
*c
, gfc_symbol
*sym
)
2932 gfc_error ("Subroutine call to '%s' in FORALL block at %L is not PURE",
2933 sym
->name
, &c
->loc
);
2934 else if (gfc_pure (NULL
))
2935 gfc_error ("Subroutine call to '%s' at %L is not PURE", sym
->name
,
2941 resolve_generic_s0 (gfc_code
*c
, gfc_symbol
*sym
)
2945 if (sym
->attr
.generic
)
2947 s
= gfc_search_interface (sym
->generic
, 1, &c
->ext
.actual
);
2950 c
->resolved_sym
= s
;
2951 pure_subroutine (c
, s
);
2955 /* TODO: Need to search for elemental references in generic interface. */
2958 if (sym
->attr
.intrinsic
)
2959 return gfc_intrinsic_sub_interface (c
, 0);
2966 resolve_generic_s (gfc_code
*c
)
2971 sym
= c
->symtree
->n
.sym
;
2975 m
= resolve_generic_s0 (c
, sym
);
2978 else if (m
== MATCH_ERROR
)
2982 if (sym
->ns
->parent
== NULL
)
2984 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2988 if (!generic_sym (sym
))
2992 /* Last ditch attempt. See if the reference is to an intrinsic
2993 that possesses a matching interface. 14.1.2.4 */
2994 sym
= c
->symtree
->n
.sym
;
2996 if (!gfc_is_intrinsic (sym
, 1, c
->loc
))
2998 gfc_error ("There is no specific subroutine for the generic '%s' at %L",
2999 sym
->name
, &c
->loc
);
3003 m
= gfc_intrinsic_sub_interface (c
, 0);
3007 gfc_error ("Generic subroutine '%s' at %L is not consistent with an "
3008 "intrinsic subroutine interface", sym
->name
, &c
->loc
);
3014 /* Set the name and binding label of the subroutine symbol in the call
3015 expression represented by 'c' to include the type and kind of the
3016 second parameter. This function is for resolving the appropriate
3017 version of c_f_pointer() and c_f_procpointer(). For example, a
3018 call to c_f_pointer() for a default integer pointer could have a
3019 name of c_f_pointer_i4. If no second arg exists, which is an error
3020 for these two functions, it defaults to the generic symbol's name
3021 and binding label. */
3024 set_name_and_label (gfc_code
*c
, gfc_symbol
*sym
,
3025 char *name
, char *binding_label
)
3027 gfc_expr
*arg
= NULL
;
3031 /* The second arg of c_f_pointer and c_f_procpointer determines
3032 the type and kind for the procedure name. */
3033 arg
= c
->ext
.actual
->next
->expr
;
3037 /* Set up the name to have the given symbol's name,
3038 plus the type and kind. */
3039 /* a derived type is marked with the type letter 'u' */
3040 if (arg
->ts
.type
== BT_DERIVED
)
3043 kind
= 0; /* set the kind as 0 for now */
3047 type
= gfc_type_letter (arg
->ts
.type
);
3048 kind
= arg
->ts
.kind
;
3051 if (arg
->ts
.type
== BT_CHARACTER
)
3052 /* Kind info for character strings not needed. */
3055 sprintf (name
, "%s_%c%d", sym
->name
, type
, kind
);
3056 /* Set up the binding label as the given symbol's label plus
3057 the type and kind. */
3058 sprintf (binding_label
, "%s_%c%d", sym
->binding_label
, type
, kind
);
3062 /* If the second arg is missing, set the name and label as
3063 was, cause it should at least be found, and the missing
3064 arg error will be caught by compare_parameters(). */
3065 sprintf (name
, "%s", sym
->name
);
3066 sprintf (binding_label
, "%s", sym
->binding_label
);
3073 /* Resolve a generic version of the iso_c_binding procedure given
3074 (sym) to the specific one based on the type and kind of the
3075 argument(s). Currently, this function resolves c_f_pointer() and
3076 c_f_procpointer based on the type and kind of the second argument
3077 (FPTR). Other iso_c_binding procedures aren't specially handled.
3078 Upon successfully exiting, c->resolved_sym will hold the resolved
3079 symbol. Returns MATCH_ERROR if an error occurred; MATCH_YES
3083 gfc_iso_c_sub_interface (gfc_code
*c
, gfc_symbol
*sym
)
3085 gfc_symbol
*new_sym
;
3086 /* this is fine, since we know the names won't use the max */
3087 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
3088 char binding_label
[GFC_MAX_BINDING_LABEL_LEN
+ 1];
3089 /* default to success; will override if find error */
3090 match m
= MATCH_YES
;
3092 /* Make sure the actual arguments are in the necessary order (based on the
3093 formal args) before resolving. */
3094 gfc_procedure_use (sym
, &c
->ext
.actual
, &(c
->loc
));
3096 if ((sym
->intmod_sym_id
== ISOCBINDING_F_POINTER
) ||
3097 (sym
->intmod_sym_id
== ISOCBINDING_F_PROCPOINTER
))
3099 set_name_and_label (c
, sym
, name
, binding_label
);
3101 if (sym
->intmod_sym_id
== ISOCBINDING_F_POINTER
)
3103 if (c
->ext
.actual
!= NULL
&& c
->ext
.actual
->next
!= NULL
)
3105 /* Make sure we got a third arg if the second arg has non-zero
3106 rank. We must also check that the type and rank are
3107 correct since we short-circuit this check in
3108 gfc_procedure_use() (called above to sort actual args). */
3109 if (c
->ext
.actual
->next
->expr
->rank
!= 0)
3111 if(c
->ext
.actual
->next
->next
== NULL
3112 || c
->ext
.actual
->next
->next
->expr
== NULL
)
3115 gfc_error ("Missing SHAPE parameter for call to %s "
3116 "at %L", sym
->name
, &(c
->loc
));
3118 else if (c
->ext
.actual
->next
->next
->expr
->ts
.type
3120 || c
->ext
.actual
->next
->next
->expr
->rank
!= 1)
3123 gfc_error ("SHAPE parameter for call to %s at %L must "
3124 "be a rank 1 INTEGER array", sym
->name
,
3131 if (m
!= MATCH_ERROR
)
3133 /* the 1 means to add the optional arg to formal list */
3134 new_sym
= get_iso_c_sym (sym
, name
, binding_label
, 1);
3136 /* for error reporting, say it's declared where the original was */
3137 new_sym
->declared_at
= sym
->declared_at
;
3142 /* no differences for c_loc or c_funloc */
3146 /* set the resolved symbol */
3147 if (m
!= MATCH_ERROR
)
3148 c
->resolved_sym
= new_sym
;
3150 c
->resolved_sym
= sym
;
3156 /* Resolve a subroutine call known to be specific. */
3159 resolve_specific_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3163 if(sym
->attr
.is_iso_c
)
3165 m
= gfc_iso_c_sub_interface (c
,sym
);
3169 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
3171 if (sym
->attr
.dummy
)
3173 sym
->attr
.proc
= PROC_DUMMY
;
3177 sym
->attr
.proc
= PROC_EXTERNAL
;
3181 if (sym
->attr
.proc
== PROC_MODULE
|| sym
->attr
.proc
== PROC_INTERNAL
)
3184 if (sym
->attr
.intrinsic
)
3186 m
= gfc_intrinsic_sub_interface (c
, 1);
3190 gfc_error ("Subroutine '%s' at %L is INTRINSIC but is not compatible "
3191 "with an intrinsic", sym
->name
, &c
->loc
);
3199 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3201 c
->resolved_sym
= sym
;
3202 pure_subroutine (c
, sym
);
3209 resolve_specific_s (gfc_code
*c
)
3214 sym
= c
->symtree
->n
.sym
;
3218 m
= resolve_specific_s0 (c
, sym
);
3221 if (m
== MATCH_ERROR
)
3224 if (sym
->ns
->parent
== NULL
)
3227 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3233 sym
= c
->symtree
->n
.sym
;
3234 gfc_error ("Unable to resolve the specific subroutine '%s' at %L",
3235 sym
->name
, &c
->loc
);
3241 /* Resolve a subroutine call not known to be generic nor specific. */
3244 resolve_unknown_s (gfc_code
*c
)
3248 sym
= c
->symtree
->n
.sym
;
3250 if (sym
->attr
.dummy
)
3252 sym
->attr
.proc
= PROC_DUMMY
;
3256 /* See if we have an intrinsic function reference. */
3258 if (gfc_is_intrinsic (sym
, 1, c
->loc
))
3260 if (gfc_intrinsic_sub_interface (c
, 1) == MATCH_YES
)
3265 /* The reference is to an external name. */
3268 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3270 c
->resolved_sym
= sym
;
3272 pure_subroutine (c
, sym
);
3278 /* Resolve a subroutine call. Although it was tempting to use the same code
3279 for functions, subroutines and functions are stored differently and this
3280 makes things awkward. */
3283 resolve_call (gfc_code
*c
)
3286 procedure_type ptype
= PROC_INTRINSIC
;
3287 gfc_symbol
*csym
, *sym
;
3288 bool no_formal_args
;
3290 csym
= c
->symtree
? c
->symtree
->n
.sym
: NULL
;
3292 if (csym
&& csym
->ts
.type
!= BT_UNKNOWN
)
3294 gfc_error ("'%s' at %L has a type, which is not consistent with "
3295 "the CALL at %L", csym
->name
, &csym
->declared_at
, &c
->loc
);
3299 if (csym
&& gfc_current_ns
->parent
&& csym
->ns
!= gfc_current_ns
)
3302 gfc_find_sym_tree (csym
->name
, gfc_current_ns
, 1, &st
);
3303 sym
= st
? st
->n
.sym
: NULL
;
3304 if (sym
&& csym
!= sym
3305 && sym
->ns
== gfc_current_ns
3306 && sym
->attr
.flavor
== FL_PROCEDURE
3307 && sym
->attr
.contained
)
3310 if (csym
->attr
.generic
)
3311 c
->symtree
->n
.sym
= sym
;
3314 csym
= c
->symtree
->n
.sym
;
3318 /* If this ia a deferred TBP with an abstract interface
3319 (which may of course be referenced), c->expr1 will be set. */
3320 if (csym
&& csym
->attr
.abstract
&& !c
->expr1
)
3322 gfc_error ("ABSTRACT INTERFACE '%s' must not be referenced at %L",
3323 csym
->name
, &c
->loc
);
3327 /* Subroutines without the RECURSIVE attribution are not allowed to
3328 * call themselves. */
3329 if (csym
&& is_illegal_recursion (csym
, gfc_current_ns
))
3331 if (csym
->attr
.entry
&& csym
->ns
->entries
)
3332 gfc_error ("ENTRY '%s' at %L cannot be called recursively, as"
3333 " subroutine '%s' is not RECURSIVE",
3334 csym
->name
, &c
->loc
, csym
->ns
->entries
->sym
->name
);
3336 gfc_error ("SUBROUTINE '%s' at %L cannot be called recursively, as it"
3337 " is not RECURSIVE", csym
->name
, &c
->loc
);
3342 /* Switch off assumed size checking and do this again for certain kinds
3343 of procedure, once the procedure itself is resolved. */
3344 need_full_assumed_size
++;
3347 ptype
= csym
->attr
.proc
;
3349 no_formal_args
= csym
&& is_external_proc (csym
) && csym
->formal
== NULL
;
3350 if (resolve_actual_arglist (c
->ext
.actual
, ptype
,
3351 no_formal_args
) == FAILURE
)
3354 /* Resume assumed_size checking. */
3355 need_full_assumed_size
--;
3357 /* If external, check for usage. */
3358 if (csym
&& is_external_proc (csym
))
3359 resolve_global_procedure (csym
, &c
->loc
, &c
->ext
.actual
, 1);
3362 if (c
->resolved_sym
== NULL
)
3364 c
->resolved_isym
= NULL
;
3365 switch (procedure_kind (csym
))
3368 t
= resolve_generic_s (c
);
3371 case PTYPE_SPECIFIC
:
3372 t
= resolve_specific_s (c
);
3376 t
= resolve_unknown_s (c
);
3380 gfc_internal_error ("resolve_subroutine(): bad function type");
3384 /* Some checks of elemental subroutine actual arguments. */
3385 if (resolve_elemental_actual (NULL
, c
) == FAILURE
)
3388 if (t
== SUCCESS
&& !(c
->resolved_sym
&& c
->resolved_sym
->attr
.elemental
))
3389 find_noncopying_intrinsics (c
->resolved_sym
, c
->ext
.actual
);
3394 /* Compare the shapes of two arrays that have non-NULL shapes. If both
3395 op1->shape and op2->shape are non-NULL return SUCCESS if their shapes
3396 match. If both op1->shape and op2->shape are non-NULL return FAILURE
3397 if their shapes do not match. If either op1->shape or op2->shape is
3398 NULL, return SUCCESS. */
3401 compare_shapes (gfc_expr
*op1
, gfc_expr
*op2
)
3408 if (op1
->shape
!= NULL
&& op2
->shape
!= NULL
)
3410 for (i
= 0; i
< op1
->rank
; i
++)
3412 if (mpz_cmp (op1
->shape
[i
], op2
->shape
[i
]) != 0)
3414 gfc_error ("Shapes for operands at %L and %L are not conformable",
3415 &op1
->where
, &op2
->where
);
3426 /* Resolve an operator expression node. This can involve replacing the
3427 operation with a user defined function call. */
3430 resolve_operator (gfc_expr
*e
)
3432 gfc_expr
*op1
, *op2
;
3434 bool dual_locus_error
;
3437 /* Resolve all subnodes-- give them types. */
3439 switch (e
->value
.op
.op
)
3442 if (gfc_resolve_expr (e
->value
.op
.op2
) == FAILURE
)
3445 /* Fall through... */
3448 case INTRINSIC_UPLUS
:
3449 case INTRINSIC_UMINUS
:
3450 case INTRINSIC_PARENTHESES
:
3451 if (gfc_resolve_expr (e
->value
.op
.op1
) == FAILURE
)
3456 /* Typecheck the new node. */
3458 op1
= e
->value
.op
.op1
;
3459 op2
= e
->value
.op
.op2
;
3460 dual_locus_error
= false;
3462 if ((op1
&& op1
->expr_type
== EXPR_NULL
)
3463 || (op2
&& op2
->expr_type
== EXPR_NULL
))
3465 sprintf (msg
, _("Invalid context for NULL() pointer at %%L"));
3469 switch (e
->value
.op
.op
)
3471 case INTRINSIC_UPLUS
:
3472 case INTRINSIC_UMINUS
:
3473 if (op1
->ts
.type
== BT_INTEGER
3474 || op1
->ts
.type
== BT_REAL
3475 || op1
->ts
.type
== BT_COMPLEX
)
3481 sprintf (msg
, _("Operand of unary numeric operator '%s' at %%L is %s"),
3482 gfc_op2string (e
->value
.op
.op
), gfc_typename (&e
->ts
));
3485 case INTRINSIC_PLUS
:
3486 case INTRINSIC_MINUS
:
3487 case INTRINSIC_TIMES
:
3488 case INTRINSIC_DIVIDE
:
3489 case INTRINSIC_POWER
:
3490 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
3492 gfc_type_convert_binary (e
, 1);
3497 _("Operands of binary numeric operator '%s' at %%L are %s/%s"),
3498 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
3499 gfc_typename (&op2
->ts
));
3502 case INTRINSIC_CONCAT
:
3503 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
3504 && op1
->ts
.kind
== op2
->ts
.kind
)
3506 e
->ts
.type
= BT_CHARACTER
;
3507 e
->ts
.kind
= op1
->ts
.kind
;
3512 _("Operands of string concatenation operator at %%L are %s/%s"),
3513 gfc_typename (&op1
->ts
), gfc_typename (&op2
->ts
));
3519 case INTRINSIC_NEQV
:
3520 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
3522 e
->ts
.type
= BT_LOGICAL
;
3523 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
3524 if (op1
->ts
.kind
< e
->ts
.kind
)
3525 gfc_convert_type (op1
, &e
->ts
, 2);
3526 else if (op2
->ts
.kind
< e
->ts
.kind
)
3527 gfc_convert_type (op2
, &e
->ts
, 2);
3531 sprintf (msg
, _("Operands of logical operator '%s' at %%L are %s/%s"),
3532 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
3533 gfc_typename (&op2
->ts
));
3538 if (op1
->ts
.type
== BT_LOGICAL
)
3540 e
->ts
.type
= BT_LOGICAL
;
3541 e
->ts
.kind
= op1
->ts
.kind
;
3545 sprintf (msg
, _("Operand of .not. operator at %%L is %s"),
3546 gfc_typename (&op1
->ts
));
3550 case INTRINSIC_GT_OS
:
3552 case INTRINSIC_GE_OS
:
3554 case INTRINSIC_LT_OS
:
3556 case INTRINSIC_LE_OS
:
3557 if (op1
->ts
.type
== BT_COMPLEX
|| op2
->ts
.type
== BT_COMPLEX
)
3559 strcpy (msg
, _("COMPLEX quantities cannot be compared at %L"));
3563 /* Fall through... */
3566 case INTRINSIC_EQ_OS
:
3568 case INTRINSIC_NE_OS
:
3569 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
3570 && op1
->ts
.kind
== op2
->ts
.kind
)
3572 e
->ts
.type
= BT_LOGICAL
;
3573 e
->ts
.kind
= gfc_default_logical_kind
;
3577 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
3579 gfc_type_convert_binary (e
, 1);
3581 e
->ts
.type
= BT_LOGICAL
;
3582 e
->ts
.kind
= gfc_default_logical_kind
;
3586 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
3588 _("Logicals at %%L must be compared with %s instead of %s"),
3589 (e
->value
.op
.op
== INTRINSIC_EQ
3590 || e
->value
.op
.op
== INTRINSIC_EQ_OS
)
3591 ? ".eqv." : ".neqv.", gfc_op2string (e
->value
.op
.op
));
3594 _("Operands of comparison operator '%s' at %%L are %s/%s"),
3595 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
3596 gfc_typename (&op2
->ts
));
3600 case INTRINSIC_USER
:
3601 if (e
->value
.op
.uop
->op
== NULL
)
3602 sprintf (msg
, _("Unknown operator '%s' at %%L"), e
->value
.op
.uop
->name
);
3603 else if (op2
== NULL
)
3604 sprintf (msg
, _("Operand of user operator '%s' at %%L is %s"),
3605 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
));
3607 sprintf (msg
, _("Operands of user operator '%s' at %%L are %s/%s"),
3608 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
),
3609 gfc_typename (&op2
->ts
));
3613 case INTRINSIC_PARENTHESES
:
3615 if (e
->ts
.type
== BT_CHARACTER
)
3616 e
->ts
.u
.cl
= op1
->ts
.u
.cl
;
3620 gfc_internal_error ("resolve_operator(): Bad intrinsic");
3623 /* Deal with arrayness of an operand through an operator. */
3627 switch (e
->value
.op
.op
)
3629 case INTRINSIC_PLUS
:
3630 case INTRINSIC_MINUS
:
3631 case INTRINSIC_TIMES
:
3632 case INTRINSIC_DIVIDE
:
3633 case INTRINSIC_POWER
:
3634 case INTRINSIC_CONCAT
:
3638 case INTRINSIC_NEQV
:
3640 case INTRINSIC_EQ_OS
:
3642 case INTRINSIC_NE_OS
:
3644 case INTRINSIC_GT_OS
:
3646 case INTRINSIC_GE_OS
:
3648 case INTRINSIC_LT_OS
:
3650 case INTRINSIC_LE_OS
:
3652 if (op1
->rank
== 0 && op2
->rank
== 0)
3655 if (op1
->rank
== 0 && op2
->rank
!= 0)
3657 e
->rank
= op2
->rank
;
3659 if (e
->shape
== NULL
)
3660 e
->shape
= gfc_copy_shape (op2
->shape
, op2
->rank
);
3663 if (op1
->rank
!= 0 && op2
->rank
== 0)
3665 e
->rank
= op1
->rank
;
3667 if (e
->shape
== NULL
)
3668 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
3671 if (op1
->rank
!= 0 && op2
->rank
!= 0)
3673 if (op1
->rank
== op2
->rank
)
3675 e
->rank
= op1
->rank
;
3676 if (e
->shape
== NULL
)
3678 t
= compare_shapes (op1
, op2
);
3682 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
3687 /* Allow higher level expressions to work. */
3690 /* Try user-defined operators, and otherwise throw an error. */
3691 dual_locus_error
= true;
3693 _("Inconsistent ranks for operator at %%L and %%L"));
3700 case INTRINSIC_PARENTHESES
:
3702 case INTRINSIC_UPLUS
:
3703 case INTRINSIC_UMINUS
:
3704 /* Simply copy arrayness attribute */
3705 e
->rank
= op1
->rank
;
3707 if (e
->shape
== NULL
)
3708 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
3716 /* Attempt to simplify the expression. */
3719 t
= gfc_simplify_expr (e
, 0);
3720 /* Some calls do not succeed in simplification and return FAILURE
3721 even though there is no error; e.g. variable references to
3722 PARAMETER arrays. */
3723 if (!gfc_is_constant_expr (e
))
3732 if (gfc_extend_expr (e
, &real_error
) == SUCCESS
)
3739 if (dual_locus_error
)
3740 gfc_error (msg
, &op1
->where
, &op2
->where
);
3742 gfc_error (msg
, &e
->where
);
3748 /************** Array resolution subroutines **************/
3751 { CMP_LT
, CMP_EQ
, CMP_GT
, CMP_UNKNOWN
}
3754 /* Compare two integer expressions. */
3757 compare_bound (gfc_expr
*a
, gfc_expr
*b
)
3761 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
3762 || b
== NULL
|| b
->expr_type
!= EXPR_CONSTANT
)
3765 /* If either of the types isn't INTEGER, we must have
3766 raised an error earlier. */
3768 if (a
->ts
.type
!= BT_INTEGER
|| b
->ts
.type
!= BT_INTEGER
)
3771 i
= mpz_cmp (a
->value
.integer
, b
->value
.integer
);
3781 /* Compare an integer expression with an integer. */
3784 compare_bound_int (gfc_expr
*a
, int b
)
3788 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
3791 if (a
->ts
.type
!= BT_INTEGER
)
3792 gfc_internal_error ("compare_bound_int(): Bad expression");
3794 i
= mpz_cmp_si (a
->value
.integer
, b
);
3804 /* Compare an integer expression with a mpz_t. */
3807 compare_bound_mpz_t (gfc_expr
*a
, mpz_t b
)
3811 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
3814 if (a
->ts
.type
!= BT_INTEGER
)
3815 gfc_internal_error ("compare_bound_int(): Bad expression");
3817 i
= mpz_cmp (a
->value
.integer
, b
);
3827 /* Compute the last value of a sequence given by a triplet.
3828 Return 0 if it wasn't able to compute the last value, or if the
3829 sequence if empty, and 1 otherwise. */
3832 compute_last_value_for_triplet (gfc_expr
*start
, gfc_expr
*end
,
3833 gfc_expr
*stride
, mpz_t last
)
3837 if (start
== NULL
|| start
->expr_type
!= EXPR_CONSTANT
3838 || end
== NULL
|| end
->expr_type
!= EXPR_CONSTANT
3839 || (stride
!= NULL
&& stride
->expr_type
!= EXPR_CONSTANT
))
3842 if (start
->ts
.type
!= BT_INTEGER
|| end
->ts
.type
!= BT_INTEGER
3843 || (stride
!= NULL
&& stride
->ts
.type
!= BT_INTEGER
))
3846 if (stride
== NULL
|| compare_bound_int(stride
, 1) == CMP_EQ
)
3848 if (compare_bound (start
, end
) == CMP_GT
)
3850 mpz_set (last
, end
->value
.integer
);
3854 if (compare_bound_int (stride
, 0) == CMP_GT
)
3856 /* Stride is positive */
3857 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) > 0)
3862 /* Stride is negative */
3863 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) < 0)
3868 mpz_sub (rem
, end
->value
.integer
, start
->value
.integer
);
3869 mpz_tdiv_r (rem
, rem
, stride
->value
.integer
);
3870 mpz_sub (last
, end
->value
.integer
, rem
);
3877 /* Compare a single dimension of an array reference to the array
3881 check_dimension (int i
, gfc_array_ref
*ar
, gfc_array_spec
*as
)
3885 if (ar
->dimen_type
[i
] == DIMEN_STAR
)
3887 gcc_assert (ar
->stride
[i
] == NULL
);
3888 /* This implies [*] as [*:] and [*:3] are not possible. */
3889 if (ar
->start
[i
] == NULL
)
3891 gcc_assert (ar
->end
[i
] == NULL
);
3896 /* Given start, end and stride values, calculate the minimum and
3897 maximum referenced indexes. */
3899 switch (ar
->dimen_type
[i
])
3906 if (compare_bound (ar
->start
[i
], as
->lower
[i
]) == CMP_LT
)
3909 gfc_warning ("Array reference at %L is out of bounds "
3910 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
3911 mpz_get_si (ar
->start
[i
]->value
.integer
),
3912 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
3914 gfc_warning ("Array reference at %L is out of bounds "
3915 "(%ld < %ld) in codimension %d", &ar
->c_where
[i
],
3916 mpz_get_si (ar
->start
[i
]->value
.integer
),
3917 mpz_get_si (as
->lower
[i
]->value
.integer
),
3921 if (compare_bound (ar
->start
[i
], as
->upper
[i
]) == CMP_GT
)
3924 gfc_warning ("Array reference at %L is out of bounds "
3925 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
3926 mpz_get_si (ar
->start
[i
]->value
.integer
),
3927 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
3929 gfc_warning ("Array reference at %L is out of bounds "
3930 "(%ld > %ld) in codimension %d", &ar
->c_where
[i
],
3931 mpz_get_si (ar
->start
[i
]->value
.integer
),
3932 mpz_get_si (as
->upper
[i
]->value
.integer
),
3941 #define AR_START (ar->start[i] ? ar->start[i] : as->lower[i])
3942 #define AR_END (ar->end[i] ? ar->end[i] : as->upper[i])
3944 comparison comp_start_end
= compare_bound (AR_START
, AR_END
);
3946 /* Check for zero stride, which is not allowed. */
3947 if (compare_bound_int (ar
->stride
[i
], 0) == CMP_EQ
)
3949 gfc_error ("Illegal stride of zero at %L", &ar
->c_where
[i
]);
3953 /* if start == len || (stride > 0 && start < len)
3954 || (stride < 0 && start > len),
3955 then the array section contains at least one element. In this
3956 case, there is an out-of-bounds access if
3957 (start < lower || start > upper). */
3958 if (compare_bound (AR_START
, AR_END
) == CMP_EQ
3959 || ((compare_bound_int (ar
->stride
[i
], 0) == CMP_GT
3960 || ar
->stride
[i
] == NULL
) && comp_start_end
== CMP_LT
)
3961 || (compare_bound_int (ar
->stride
[i
], 0) == CMP_LT
3962 && comp_start_end
== CMP_GT
))
3964 if (compare_bound (AR_START
, as
->lower
[i
]) == CMP_LT
)
3966 gfc_warning ("Lower array reference at %L is out of bounds "
3967 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
3968 mpz_get_si (AR_START
->value
.integer
),
3969 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
3972 if (compare_bound (AR_START
, as
->upper
[i
]) == CMP_GT
)
3974 gfc_warning ("Lower array reference at %L is out of bounds "
3975 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
3976 mpz_get_si (AR_START
->value
.integer
),
3977 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
3982 /* If we can compute the highest index of the array section,
3983 then it also has to be between lower and upper. */
3984 mpz_init (last_value
);
3985 if (compute_last_value_for_triplet (AR_START
, AR_END
, ar
->stride
[i
],
3988 if (compare_bound_mpz_t (as
->lower
[i
], last_value
) == CMP_GT
)
3990 gfc_warning ("Upper array reference at %L is out of bounds "
3991 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
3992 mpz_get_si (last_value
),
3993 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
3994 mpz_clear (last_value
);
3997 if (compare_bound_mpz_t (as
->upper
[i
], last_value
) == CMP_LT
)
3999 gfc_warning ("Upper array reference at %L is out of bounds "
4000 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4001 mpz_get_si (last_value
),
4002 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4003 mpz_clear (last_value
);
4007 mpz_clear (last_value
);
4015 gfc_internal_error ("check_dimension(): Bad array reference");
4022 /* Compare an array reference with an array specification. */
4025 compare_spec_to_ref (gfc_array_ref
*ar
)
4032 /* TODO: Full array sections are only allowed as actual parameters. */
4033 if (as
->type
== AS_ASSUMED_SIZE
4034 && (/*ar->type == AR_FULL
4035 ||*/ (ar
->type
== AR_SECTION
4036 && ar
->dimen_type
[i
] == DIMEN_RANGE
&& ar
->end
[i
] == NULL
)))
4038 gfc_error ("Rightmost upper bound of assumed size array section "
4039 "not specified at %L", &ar
->where
);
4043 if (ar
->type
== AR_FULL
)
4046 if (as
->rank
!= ar
->dimen
)
4048 gfc_error ("Rank mismatch in array reference at %L (%d/%d)",
4049 &ar
->where
, ar
->dimen
, as
->rank
);
4053 /* ar->codimen == 0 is a local array. */
4054 if (as
->corank
!= ar
->codimen
&& ar
->codimen
!= 0)
4056 gfc_error ("Coindex rank mismatch in array reference at %L (%d/%d)",
4057 &ar
->where
, ar
->codimen
, as
->corank
);
4061 for (i
= 0; i
< as
->rank
; i
++)
4062 if (check_dimension (i
, ar
, as
) == FAILURE
)
4065 /* Local access has no coarray spec. */
4066 if (ar
->codimen
!= 0)
4067 for (i
= as
->rank
; i
< as
->rank
+ as
->corank
; i
++)
4069 if (ar
->dimen_type
[i
] != DIMEN_ELEMENT
&& !ar
->in_allocate
)
4071 gfc_error ("Coindex of codimension %d must be a scalar at %L",
4072 i
+ 1 - as
->rank
, &ar
->where
);
4075 if (check_dimension (i
, ar
, as
) == FAILURE
)
4083 /* Resolve one part of an array index. */
4086 gfc_resolve_index_1 (gfc_expr
*index
, int check_scalar
,
4087 int force_index_integer_kind
)
4094 if (gfc_resolve_expr (index
) == FAILURE
)
4097 if (check_scalar
&& index
->rank
!= 0)
4099 gfc_error ("Array index at %L must be scalar", &index
->where
);
4103 if (index
->ts
.type
!= BT_INTEGER
&& index
->ts
.type
!= BT_REAL
)
4105 gfc_error ("Array index at %L must be of INTEGER type, found %s",
4106 &index
->where
, gfc_basic_typename (index
->ts
.type
));
4110 if (index
->ts
.type
== BT_REAL
)
4111 if (gfc_notify_std (GFC_STD_LEGACY
, "Extension: REAL array index at %L",
4112 &index
->where
) == FAILURE
)
4115 if ((index
->ts
.kind
!= gfc_index_integer_kind
4116 && force_index_integer_kind
)
4117 || index
->ts
.type
!= BT_INTEGER
)
4120 ts
.type
= BT_INTEGER
;
4121 ts
.kind
= gfc_index_integer_kind
;
4123 gfc_convert_type_warn (index
, &ts
, 2, 0);
4129 /* Resolve one part of an array index. */
4132 gfc_resolve_index (gfc_expr
*index
, int check_scalar
)
4134 return gfc_resolve_index_1 (index
, check_scalar
, 1);
4137 /* Resolve a dim argument to an intrinsic function. */
4140 gfc_resolve_dim_arg (gfc_expr
*dim
)
4145 if (gfc_resolve_expr (dim
) == FAILURE
)
4150 gfc_error ("Argument dim at %L must be scalar", &dim
->where
);
4155 if (dim
->ts
.type
!= BT_INTEGER
)
4157 gfc_error ("Argument dim at %L must be of INTEGER type", &dim
->where
);
4161 if (dim
->ts
.kind
!= gfc_index_integer_kind
)
4166 ts
.type
= BT_INTEGER
;
4167 ts
.kind
= gfc_index_integer_kind
;
4169 gfc_convert_type_warn (dim
, &ts
, 2, 0);
4175 /* Given an expression that contains array references, update those array
4176 references to point to the right array specifications. While this is
4177 filled in during matching, this information is difficult to save and load
4178 in a module, so we take care of it here.
4180 The idea here is that the original array reference comes from the
4181 base symbol. We traverse the list of reference structures, setting
4182 the stored reference to references. Component references can
4183 provide an additional array specification. */
4186 find_array_spec (gfc_expr
*e
)
4190 gfc_symbol
*derived
;
4193 if (e
->symtree
->n
.sym
->ts
.type
== BT_CLASS
)
4194 as
= CLASS_DATA (e
->symtree
->n
.sym
)->as
;
4196 as
= e
->symtree
->n
.sym
->as
;
4199 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4204 gfc_internal_error ("find_array_spec(): Missing spec");
4211 if (derived
== NULL
)
4212 derived
= e
->symtree
->n
.sym
->ts
.u
.derived
;
4214 if (derived
->attr
.is_class
)
4215 derived
= derived
->components
->ts
.u
.derived
;
4217 c
= derived
->components
;
4219 for (; c
; c
= c
->next
)
4220 if (c
== ref
->u
.c
.component
)
4222 /* Track the sequence of component references. */
4223 if (c
->ts
.type
== BT_DERIVED
)
4224 derived
= c
->ts
.u
.derived
;
4229 gfc_internal_error ("find_array_spec(): Component not found");
4231 if (c
->attr
.dimension
)
4234 gfc_internal_error ("find_array_spec(): unused as(1)");
4245 gfc_internal_error ("find_array_spec(): unused as(2)");
4249 /* Resolve an array reference. */
4252 resolve_array_ref (gfc_array_ref
*ar
)
4254 int i
, check_scalar
;
4257 for (i
= 0; i
< ar
->dimen
+ ar
->codimen
; i
++)
4259 check_scalar
= ar
->dimen_type
[i
] == DIMEN_RANGE
;
4261 /* Do not force gfc_index_integer_kind for the start. We can
4262 do fine with any integer kind. This avoids temporary arrays
4263 created for indexing with a vector. */
4264 if (gfc_resolve_index_1 (ar
->start
[i
], check_scalar
, 0) == FAILURE
)
4266 if (gfc_resolve_index (ar
->end
[i
], check_scalar
) == FAILURE
)
4268 if (gfc_resolve_index (ar
->stride
[i
], check_scalar
) == FAILURE
)
4273 if (ar
->dimen_type
[i
] == DIMEN_UNKNOWN
)
4277 ar
->dimen_type
[i
] = DIMEN_ELEMENT
;
4281 ar
->dimen_type
[i
] = DIMEN_VECTOR
;
4282 if (e
->expr_type
== EXPR_VARIABLE
4283 && e
->symtree
->n
.sym
->ts
.type
== BT_DERIVED
)
4284 ar
->start
[i
] = gfc_get_parentheses (e
);
4288 gfc_error ("Array index at %L is an array of rank %d",
4289 &ar
->c_where
[i
], e
->rank
);
4294 if (ar
->type
== AR_FULL
&& ar
->as
->rank
== 0)
4295 ar
->type
= AR_ELEMENT
;
4297 /* If the reference type is unknown, figure out what kind it is. */
4299 if (ar
->type
== AR_UNKNOWN
)
4301 ar
->type
= AR_ELEMENT
;
4302 for (i
= 0; i
< ar
->dimen
; i
++)
4303 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4304 || ar
->dimen_type
[i
] == DIMEN_VECTOR
)
4306 ar
->type
= AR_SECTION
;
4311 if (!ar
->as
->cray_pointee
&& compare_spec_to_ref (ar
) == FAILURE
)
4319 resolve_substring (gfc_ref
*ref
)
4321 int k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
4323 if (ref
->u
.ss
.start
!= NULL
)
4325 if (gfc_resolve_expr (ref
->u
.ss
.start
) == FAILURE
)
4328 if (ref
->u
.ss
.start
->ts
.type
!= BT_INTEGER
)
4330 gfc_error ("Substring start index at %L must be of type INTEGER",
4331 &ref
->u
.ss
.start
->where
);
4335 if (ref
->u
.ss
.start
->rank
!= 0)
4337 gfc_error ("Substring start index at %L must be scalar",
4338 &ref
->u
.ss
.start
->where
);
4342 if (compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_LT
4343 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4344 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4346 gfc_error ("Substring start index at %L is less than one",
4347 &ref
->u
.ss
.start
->where
);
4352 if (ref
->u
.ss
.end
!= NULL
)
4354 if (gfc_resolve_expr (ref
->u
.ss
.end
) == FAILURE
)
4357 if (ref
->u
.ss
.end
->ts
.type
!= BT_INTEGER
)
4359 gfc_error ("Substring end index at %L must be of type INTEGER",
4360 &ref
->u
.ss
.end
->where
);
4364 if (ref
->u
.ss
.end
->rank
!= 0)
4366 gfc_error ("Substring end index at %L must be scalar",
4367 &ref
->u
.ss
.end
->where
);
4371 if (ref
->u
.ss
.length
!= NULL
4372 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_GT
4373 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4374 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4376 gfc_error ("Substring end index at %L exceeds the string length",
4377 &ref
->u
.ss
.start
->where
);
4381 if (compare_bound_mpz_t (ref
->u
.ss
.end
,
4382 gfc_integer_kinds
[k
].huge
) == CMP_GT
4383 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4384 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4386 gfc_error ("Substring end index at %L is too large",
4387 &ref
->u
.ss
.end
->where
);
4396 /* This function supplies missing substring charlens. */
4399 gfc_resolve_substring_charlen (gfc_expr
*e
)
4402 gfc_expr
*start
, *end
;
4404 for (char_ref
= e
->ref
; char_ref
; char_ref
= char_ref
->next
)
4405 if (char_ref
->type
== REF_SUBSTRING
)
4411 gcc_assert (char_ref
->next
== NULL
);
4415 if (e
->ts
.u
.cl
->length
)
4416 gfc_free_expr (e
->ts
.u
.cl
->length
);
4417 else if (e
->expr_type
== EXPR_VARIABLE
4418 && e
->symtree
->n
.sym
->attr
.dummy
)
4422 e
->ts
.type
= BT_CHARACTER
;
4423 e
->ts
.kind
= gfc_default_character_kind
;
4426 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
4428 if (char_ref
->u
.ss
.start
)
4429 start
= gfc_copy_expr (char_ref
->u
.ss
.start
);
4431 start
= gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
4433 if (char_ref
->u
.ss
.end
)
4434 end
= gfc_copy_expr (char_ref
->u
.ss
.end
);
4435 else if (e
->expr_type
== EXPR_VARIABLE
)
4436 end
= gfc_copy_expr (e
->symtree
->n
.sym
->ts
.u
.cl
->length
);
4443 /* Length = (end - start +1). */
4444 e
->ts
.u
.cl
->length
= gfc_subtract (end
, start
);
4445 e
->ts
.u
.cl
->length
= gfc_add (e
->ts
.u
.cl
->length
,
4446 gfc_get_int_expr (gfc_default_integer_kind
,
4449 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
4450 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
4452 /* Make sure that the length is simplified. */
4453 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 1);
4454 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
4458 /* Resolve subtype references. */
4461 resolve_ref (gfc_expr
*expr
)
4463 int current_part_dimension
, n_components
, seen_part_dimension
;
4466 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
4467 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.as
== NULL
)
4469 find_array_spec (expr
);
4473 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
4477 if (resolve_array_ref (&ref
->u
.ar
) == FAILURE
)
4485 resolve_substring (ref
);
4489 /* Check constraints on part references. */
4491 current_part_dimension
= 0;
4492 seen_part_dimension
= 0;
4495 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
4500 switch (ref
->u
.ar
.type
)
4503 /* Coarray scalar. */
4504 if (ref
->u
.ar
.as
->rank
== 0)
4506 current_part_dimension
= 0;
4511 current_part_dimension
= 1;
4515 current_part_dimension
= 0;
4519 gfc_internal_error ("resolve_ref(): Bad array reference");
4525 if (current_part_dimension
|| seen_part_dimension
)
4528 if (ref
->u
.c
.component
->attr
.pointer
4529 || ref
->u
.c
.component
->attr
.proc_pointer
)
4531 gfc_error ("Component to the right of a part reference "
4532 "with nonzero rank must not have the POINTER "
4533 "attribute at %L", &expr
->where
);
4536 else if (ref
->u
.c
.component
->attr
.allocatable
)
4538 gfc_error ("Component to the right of a part reference "
4539 "with nonzero rank must not have the ALLOCATABLE "
4540 "attribute at %L", &expr
->where
);
4552 if (((ref
->type
== REF_COMPONENT
&& n_components
> 1)
4553 || ref
->next
== NULL
)
4554 && current_part_dimension
4555 && seen_part_dimension
)
4557 gfc_error ("Two or more part references with nonzero rank must "
4558 "not be specified at %L", &expr
->where
);
4562 if (ref
->type
== REF_COMPONENT
)
4564 if (current_part_dimension
)
4565 seen_part_dimension
= 1;
4567 /* reset to make sure */
4568 current_part_dimension
= 0;
4576 /* Given an expression, determine its shape. This is easier than it sounds.
4577 Leaves the shape array NULL if it is not possible to determine the shape. */
4580 expression_shape (gfc_expr
*e
)
4582 mpz_t array
[GFC_MAX_DIMENSIONS
];
4585 if (e
->rank
== 0 || e
->shape
!= NULL
)
4588 for (i
= 0; i
< e
->rank
; i
++)
4589 if (gfc_array_dimen_size (e
, i
, &array
[i
]) == FAILURE
)
4592 e
->shape
= gfc_get_shape (e
->rank
);
4594 memcpy (e
->shape
, array
, e
->rank
* sizeof (mpz_t
));
4599 for (i
--; i
>= 0; i
--)
4600 mpz_clear (array
[i
]);
4604 /* Given a variable expression node, compute the rank of the expression by
4605 examining the base symbol and any reference structures it may have. */
4608 expression_rank (gfc_expr
*e
)
4613 /* Just to make sure, because EXPR_COMPCALL's also have an e->ref and that
4614 could lead to serious confusion... */
4615 gcc_assert (e
->expr_type
!= EXPR_COMPCALL
);
4619 if (e
->expr_type
== EXPR_ARRAY
)
4621 /* Constructors can have a rank different from one via RESHAPE(). */
4623 if (e
->symtree
== NULL
)
4629 e
->rank
= (e
->symtree
->n
.sym
->as
== NULL
)
4630 ? 0 : e
->symtree
->n
.sym
->as
->rank
;
4636 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4638 if (ref
->type
!= REF_ARRAY
)
4641 if (ref
->u
.ar
.type
== AR_FULL
)
4643 rank
= ref
->u
.ar
.as
->rank
;
4647 if (ref
->u
.ar
.type
== AR_SECTION
)
4649 /* Figure out the rank of the section. */
4651 gfc_internal_error ("expression_rank(): Two array specs");
4653 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
4654 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_RANGE
4655 || ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
)
4665 expression_shape (e
);
4669 /* Resolve a variable expression. */
4672 resolve_variable (gfc_expr
*e
)
4679 if (e
->symtree
== NULL
)
4682 if (e
->ref
&& resolve_ref (e
) == FAILURE
)
4685 sym
= e
->symtree
->n
.sym
;
4686 if (sym
->attr
.flavor
== FL_PROCEDURE
4687 && (!sym
->attr
.function
4688 || (sym
->attr
.function
&& sym
->result
4689 && sym
->result
->attr
.proc_pointer
4690 && !sym
->result
->attr
.function
)))
4692 e
->ts
.type
= BT_PROCEDURE
;
4693 goto resolve_procedure
;
4696 if (sym
->ts
.type
!= BT_UNKNOWN
)
4697 gfc_variable_attr (e
, &e
->ts
);
4700 /* Must be a simple variable reference. */
4701 if (gfc_set_default_type (sym
, 1, sym
->ns
) == FAILURE
)
4706 if (check_assumed_size_reference (sym
, e
))
4709 /* Deal with forward references to entries during resolve_code, to
4710 satisfy, at least partially, 12.5.2.5. */
4711 if (gfc_current_ns
->entries
4712 && current_entry_id
== sym
->entry_id
4715 && cs_base
->current
->op
!= EXEC_ENTRY
)
4717 gfc_entry_list
*entry
;
4718 gfc_formal_arglist
*formal
;
4722 /* If the symbol is a dummy... */
4723 if (sym
->attr
.dummy
&& sym
->ns
== gfc_current_ns
)
4725 entry
= gfc_current_ns
->entries
;
4728 /* ...test if the symbol is a parameter of previous entries. */
4729 for (; entry
&& entry
->id
<= current_entry_id
; entry
= entry
->next
)
4730 for (formal
= entry
->sym
->formal
; formal
; formal
= formal
->next
)
4732 if (formal
->sym
&& sym
->name
== formal
->sym
->name
)
4736 /* If it has not been seen as a dummy, this is an error. */
4739 if (specification_expr
)
4740 gfc_error ("Variable '%s', used in a specification expression"
4741 ", is referenced at %L before the ENTRY statement "
4742 "in which it is a parameter",
4743 sym
->name
, &cs_base
->current
->loc
);
4745 gfc_error ("Variable '%s' is used at %L before the ENTRY "
4746 "statement in which it is a parameter",
4747 sym
->name
, &cs_base
->current
->loc
);
4752 /* Now do the same check on the specification expressions. */
4753 specification_expr
= 1;
4754 if (sym
->ts
.type
== BT_CHARACTER
4755 && gfc_resolve_expr (sym
->ts
.u
.cl
->length
) == FAILURE
)
4759 for (n
= 0; n
< sym
->as
->rank
; n
++)
4761 specification_expr
= 1;
4762 if (gfc_resolve_expr (sym
->as
->lower
[n
]) == FAILURE
)
4764 specification_expr
= 1;
4765 if (gfc_resolve_expr (sym
->as
->upper
[n
]) == FAILURE
)
4768 specification_expr
= 0;
4771 /* Update the symbol's entry level. */
4772 sym
->entry_id
= current_entry_id
+ 1;
4776 if (t
== SUCCESS
&& resolve_procedure_expression (e
) == FAILURE
)
4779 /* F2008, C617 and C1229. */
4780 if (!inquiry_argument
&& (e
->ts
.type
== BT_CLASS
|| e
->ts
.type
== BT_DERIVED
)
4781 && gfc_is_coindexed (e
))
4783 gfc_ref
*ref
, *ref2
= NULL
;
4785 if (e
->ts
.type
== BT_CLASS
)
4787 gfc_error ("Polymorphic subobject of coindexed object at %L",
4792 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4794 if (ref
->type
== REF_COMPONENT
)
4796 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
4800 for ( ; ref
; ref
= ref
->next
)
4801 if (ref
->type
== REF_COMPONENT
)
4804 /* Expression itself is coindexed object. */
4808 c
= ref2
? ref2
->u
.c
.component
: e
->symtree
->n
.sym
->components
;
4809 for ( ; c
; c
= c
->next
)
4810 if (c
->attr
.allocatable
&& c
->ts
.type
== BT_CLASS
)
4812 gfc_error ("Coindexed object with polymorphic allocatable "
4813 "subcomponent at %L", &e
->where
);
4824 /* Checks to see that the correct symbol has been host associated.
4825 The only situation where this arises is that in which a twice
4826 contained function is parsed after the host association is made.
4827 Therefore, on detecting this, change the symbol in the expression
4828 and convert the array reference into an actual arglist if the old
4829 symbol is a variable. */
4831 check_host_association (gfc_expr
*e
)
4833 gfc_symbol
*sym
, *old_sym
;
4837 gfc_actual_arglist
*arg
, *tail
= NULL
;
4838 bool retval
= e
->expr_type
== EXPR_FUNCTION
;
4840 /* If the expression is the result of substitution in
4841 interface.c(gfc_extend_expr) because there is no way in
4842 which the host association can be wrong. */
4843 if (e
->symtree
== NULL
4844 || e
->symtree
->n
.sym
== NULL
4845 || e
->user_operator
)
4848 old_sym
= e
->symtree
->n
.sym
;
4850 if (gfc_current_ns
->parent
4851 && old_sym
->ns
!= gfc_current_ns
)
4853 /* Use the 'USE' name so that renamed module symbols are
4854 correctly handled. */
4855 gfc_find_symbol (e
->symtree
->name
, gfc_current_ns
, 1, &sym
);
4857 if (sym
&& old_sym
!= sym
4858 && sym
->ts
.type
== old_sym
->ts
.type
4859 && sym
->attr
.flavor
== FL_PROCEDURE
4860 && sym
->attr
.contained
)
4862 /* Clear the shape, since it might not be valid. */
4863 if (e
->shape
!= NULL
)
4865 for (n
= 0; n
< e
->rank
; n
++)
4866 mpz_clear (e
->shape
[n
]);
4868 gfc_free (e
->shape
);
4871 /* Give the expression the right symtree! */
4872 gfc_find_sym_tree (e
->symtree
->name
, NULL
, 1, &st
);
4873 gcc_assert (st
!= NULL
);
4875 if (old_sym
->attr
.flavor
== FL_PROCEDURE
4876 || e
->expr_type
== EXPR_FUNCTION
)
4878 /* Original was function so point to the new symbol, since
4879 the actual argument list is already attached to the
4881 e
->value
.function
.esym
= NULL
;
4886 /* Original was variable so convert array references into
4887 an actual arglist. This does not need any checking now
4888 since gfc_resolve_function will take care of it. */
4889 e
->value
.function
.actual
= NULL
;
4890 e
->expr_type
= EXPR_FUNCTION
;
4893 /* Ambiguity will not arise if the array reference is not
4894 the last reference. */
4895 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4896 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
4899 gcc_assert (ref
->type
== REF_ARRAY
);
4901 /* Grab the start expressions from the array ref and
4902 copy them into actual arguments. */
4903 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
4905 arg
= gfc_get_actual_arglist ();
4906 arg
->expr
= gfc_copy_expr (ref
->u
.ar
.start
[n
]);
4907 if (e
->value
.function
.actual
== NULL
)
4908 tail
= e
->value
.function
.actual
= arg
;
4916 /* Dump the reference list and set the rank. */
4917 gfc_free_ref_list (e
->ref
);
4919 e
->rank
= sym
->as
? sym
->as
->rank
: 0;
4922 gfc_resolve_expr (e
);
4926 /* This might have changed! */
4927 return e
->expr_type
== EXPR_FUNCTION
;
4932 gfc_resolve_character_operator (gfc_expr
*e
)
4934 gfc_expr
*op1
= e
->value
.op
.op1
;
4935 gfc_expr
*op2
= e
->value
.op
.op2
;
4936 gfc_expr
*e1
= NULL
;
4937 gfc_expr
*e2
= NULL
;
4939 gcc_assert (e
->value
.op
.op
== INTRINSIC_CONCAT
);
4941 if (op1
->ts
.u
.cl
&& op1
->ts
.u
.cl
->length
)
4942 e1
= gfc_copy_expr (op1
->ts
.u
.cl
->length
);
4943 else if (op1
->expr_type
== EXPR_CONSTANT
)
4944 e1
= gfc_get_int_expr (gfc_default_integer_kind
, NULL
,
4945 op1
->value
.character
.length
);
4947 if (op2
->ts
.u
.cl
&& op2
->ts
.u
.cl
->length
)
4948 e2
= gfc_copy_expr (op2
->ts
.u
.cl
->length
);
4949 else if (op2
->expr_type
== EXPR_CONSTANT
)
4950 e2
= gfc_get_int_expr (gfc_default_integer_kind
, NULL
,
4951 op2
->value
.character
.length
);
4953 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
4958 e
->ts
.u
.cl
->length
= gfc_add (e1
, e2
);
4959 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
4960 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
4961 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 0);
4962 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
4968 /* Ensure that an character expression has a charlen and, if possible, a
4969 length expression. */
4972 fixup_charlen (gfc_expr
*e
)
4974 /* The cases fall through so that changes in expression type and the need
4975 for multiple fixes are picked up. In all circumstances, a charlen should
4976 be available for the middle end to hang a backend_decl on. */
4977 switch (e
->expr_type
)
4980 gfc_resolve_character_operator (e
);
4983 if (e
->expr_type
== EXPR_ARRAY
)
4984 gfc_resolve_character_array_constructor (e
);
4986 case EXPR_SUBSTRING
:
4987 if (!e
->ts
.u
.cl
&& e
->ref
)
4988 gfc_resolve_substring_charlen (e
);
4992 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
4999 /* Update an actual argument to include the passed-object for type-bound
5000 procedures at the right position. */
5002 static gfc_actual_arglist
*
5003 update_arglist_pass (gfc_actual_arglist
* lst
, gfc_expr
* po
, unsigned argpos
,
5006 gcc_assert (argpos
> 0);
5010 gfc_actual_arglist
* result
;
5012 result
= gfc_get_actual_arglist ();
5016 result
->name
= name
;
5022 lst
->next
= update_arglist_pass (lst
->next
, po
, argpos
- 1, name
);
5024 lst
= update_arglist_pass (NULL
, po
, argpos
- 1, name
);
5029 /* Extract the passed-object from an EXPR_COMPCALL (a copy of it). */
5032 extract_compcall_passed_object (gfc_expr
* e
)
5036 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
5038 if (e
->value
.compcall
.base_object
)
5039 po
= gfc_copy_expr (e
->value
.compcall
.base_object
);
5042 po
= gfc_get_expr ();
5043 po
->expr_type
= EXPR_VARIABLE
;
5044 po
->symtree
= e
->symtree
;
5045 po
->ref
= gfc_copy_ref (e
->ref
);
5046 po
->where
= e
->where
;
5049 if (gfc_resolve_expr (po
) == FAILURE
)
5056 /* Update the arglist of an EXPR_COMPCALL expression to include the
5060 update_compcall_arglist (gfc_expr
* e
)
5063 gfc_typebound_proc
* tbp
;
5065 tbp
= e
->value
.compcall
.tbp
;
5070 po
= extract_compcall_passed_object (e
);
5074 if (tbp
->nopass
|| e
->value
.compcall
.ignore_pass
)
5080 gcc_assert (tbp
->pass_arg_num
> 0);
5081 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
5089 /* Extract the passed object from a PPC call (a copy of it). */
5092 extract_ppc_passed_object (gfc_expr
*e
)
5097 po
= gfc_get_expr ();
5098 po
->expr_type
= EXPR_VARIABLE
;
5099 po
->symtree
= e
->symtree
;
5100 po
->ref
= gfc_copy_ref (e
->ref
);
5101 po
->where
= e
->where
;
5103 /* Remove PPC reference. */
5105 while ((*ref
)->next
)
5106 ref
= &(*ref
)->next
;
5107 gfc_free_ref_list (*ref
);
5110 if (gfc_resolve_expr (po
) == FAILURE
)
5117 /* Update the actual arglist of a procedure pointer component to include the
5121 update_ppc_arglist (gfc_expr
* e
)
5125 gfc_typebound_proc
* tb
;
5127 if (!gfc_is_proc_ptr_comp (e
, &ppc
))
5134 else if (tb
->nopass
)
5137 po
= extract_ppc_passed_object (e
);
5143 gfc_error ("Passed-object at %L must be scalar", &e
->where
);
5147 gcc_assert (tb
->pass_arg_num
> 0);
5148 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
5156 /* Check that the object a TBP is called on is valid, i.e. it must not be
5157 of ABSTRACT type (as in subobject%abstract_parent%tbp()). */
5160 check_typebound_baseobject (gfc_expr
* e
)
5164 base
= extract_compcall_passed_object (e
);
5168 gcc_assert (base
->ts
.type
== BT_DERIVED
|| base
->ts
.type
== BT_CLASS
);
5170 if (base
->ts
.type
== BT_DERIVED
&& base
->ts
.u
.derived
->attr
.abstract
)
5172 gfc_error ("Base object for type-bound procedure call at %L is of"
5173 " ABSTRACT type '%s'", &e
->where
, base
->ts
.u
.derived
->name
);
5177 /* If the procedure called is NOPASS, the base object must be scalar. */
5178 if (e
->value
.compcall
.tbp
->nopass
&& base
->rank
> 0)
5180 gfc_error ("Base object for NOPASS type-bound procedure call at %L must"
5181 " be scalar", &e
->where
);
5185 /* FIXME: Remove once PR 41177 (this problem) is fixed completely. */
5188 gfc_error ("Non-scalar base object at %L currently not implemented",
5197 /* Resolve a call to a type-bound procedure, either function or subroutine,
5198 statically from the data in an EXPR_COMPCALL expression. The adapted
5199 arglist and the target-procedure symtree are returned. */
5202 resolve_typebound_static (gfc_expr
* e
, gfc_symtree
** target
,
5203 gfc_actual_arglist
** actual
)
5205 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
5206 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
5208 /* Update the actual arglist for PASS. */
5209 if (update_compcall_arglist (e
) == FAILURE
)
5212 *actual
= e
->value
.compcall
.actual
;
5213 *target
= e
->value
.compcall
.tbp
->u
.specific
;
5215 gfc_free_ref_list (e
->ref
);
5217 e
->value
.compcall
.actual
= NULL
;
5223 /* Get the ultimate declared type from an expression. In addition,
5224 return the last class/derived type reference and the copy of the
5227 get_declared_from_expr (gfc_ref
**class_ref
, gfc_ref
**new_ref
,
5230 gfc_symbol
*declared
;
5237 *new_ref
= gfc_copy_ref (e
->ref
);
5239 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5241 if (ref
->type
!= REF_COMPONENT
)
5244 if (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5245 || ref
->u
.c
.component
->ts
.type
== BT_DERIVED
)
5247 declared
= ref
->u
.c
.component
->ts
.u
.derived
;
5253 if (declared
== NULL
)
5254 declared
= e
->symtree
->n
.sym
->ts
.u
.derived
;
5260 /* Given an EXPR_COMPCALL calling a GENERIC typebound procedure, figure out
5261 which of the specific bindings (if any) matches the arglist and transform
5262 the expression into a call of that binding. */
5265 resolve_typebound_generic_call (gfc_expr
* e
, const char **name
)
5267 gfc_typebound_proc
* genproc
;
5268 const char* genname
;
5270 gfc_symbol
*derived
;
5272 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
5273 genname
= e
->value
.compcall
.name
;
5274 genproc
= e
->value
.compcall
.tbp
;
5276 if (!genproc
->is_generic
)
5279 /* Try the bindings on this type and in the inheritance hierarchy. */
5280 for (; genproc
; genproc
= genproc
->overridden
)
5284 gcc_assert (genproc
->is_generic
);
5285 for (g
= genproc
->u
.generic
; g
; g
= g
->next
)
5288 gfc_actual_arglist
* args
;
5291 gcc_assert (g
->specific
);
5293 if (g
->specific
->error
)
5296 target
= g
->specific
->u
.specific
->n
.sym
;
5298 /* Get the right arglist by handling PASS/NOPASS. */
5299 args
= gfc_copy_actual_arglist (e
->value
.compcall
.actual
);
5300 if (!g
->specific
->nopass
)
5303 po
= extract_compcall_passed_object (e
);
5307 gcc_assert (g
->specific
->pass_arg_num
> 0);
5308 gcc_assert (!g
->specific
->error
);
5309 args
= update_arglist_pass (args
, po
, g
->specific
->pass_arg_num
,
5310 g
->specific
->pass_arg
);
5312 resolve_actual_arglist (args
, target
->attr
.proc
,
5313 is_external_proc (target
) && !target
->formal
);
5315 /* Check if this arglist matches the formal. */
5316 matches
= gfc_arglist_matches_symbol (&args
, target
);
5318 /* Clean up and break out of the loop if we've found it. */
5319 gfc_free_actual_arglist (args
);
5322 e
->value
.compcall
.tbp
= g
->specific
;
5323 /* Pass along the name for CLASS methods, where the vtab
5324 procedure pointer component has to be referenced. */
5326 *name
= g
->specific_st
->name
;
5332 /* Nothing matching found! */
5333 gfc_error ("Found no matching specific binding for the call to the GENERIC"
5334 " '%s' at %L", genname
, &e
->where
);
5338 /* Make sure that we have the right specific instance for the name. */
5339 genname
= e
->value
.compcall
.tbp
->u
.specific
->name
;
5341 /* Is the symtree name a "unique name". */
5342 if (*genname
== '@')
5343 genname
= e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->name
;
5345 derived
= get_declared_from_expr (NULL
, NULL
, e
);
5347 st
= gfc_find_typebound_proc (derived
, NULL
, genname
, false, &e
->where
);
5349 e
->value
.compcall
.tbp
= st
->n
.tb
;
5355 /* Resolve a call to a type-bound subroutine. */
5358 resolve_typebound_call (gfc_code
* c
, const char **name
)
5360 gfc_actual_arglist
* newactual
;
5361 gfc_symtree
* target
;
5363 /* Check that's really a SUBROUTINE. */
5364 if (!c
->expr1
->value
.compcall
.tbp
->subroutine
)
5366 gfc_error ("'%s' at %L should be a SUBROUTINE",
5367 c
->expr1
->value
.compcall
.name
, &c
->loc
);
5371 if (check_typebound_baseobject (c
->expr1
) == FAILURE
)
5374 /* Pass along the name for CLASS methods, where the vtab
5375 procedure pointer component has to be referenced. */
5377 *name
= c
->expr1
->value
.compcall
.name
;
5379 if (resolve_typebound_generic_call (c
->expr1
, name
) == FAILURE
)
5382 /* Transform into an ordinary EXEC_CALL for now. */
5384 if (resolve_typebound_static (c
->expr1
, &target
, &newactual
) == FAILURE
)
5387 c
->ext
.actual
= newactual
;
5388 c
->symtree
= target
;
5389 c
->op
= (c
->expr1
->value
.compcall
.assign
? EXEC_ASSIGN_CALL
: EXEC_CALL
);
5391 gcc_assert (!c
->expr1
->ref
&& !c
->expr1
->value
.compcall
.actual
);
5393 gfc_free_expr (c
->expr1
);
5394 c
->expr1
= gfc_get_expr ();
5395 c
->expr1
->expr_type
= EXPR_FUNCTION
;
5396 c
->expr1
->symtree
= target
;
5397 c
->expr1
->where
= c
->loc
;
5399 return resolve_call (c
);
5403 /* Resolve a component-call expression. */
5405 resolve_compcall (gfc_expr
* e
, const char **name
)
5407 gfc_actual_arglist
* newactual
;
5408 gfc_symtree
* target
;
5410 /* Check that's really a FUNCTION. */
5411 if (!e
->value
.compcall
.tbp
->function
)
5413 gfc_error ("'%s' at %L should be a FUNCTION",
5414 e
->value
.compcall
.name
, &e
->where
);
5418 /* These must not be assign-calls! */
5419 gcc_assert (!e
->value
.compcall
.assign
);
5421 if (check_typebound_baseobject (e
) == FAILURE
)
5424 /* Pass along the name for CLASS methods, where the vtab
5425 procedure pointer component has to be referenced. */
5427 *name
= e
->value
.compcall
.name
;
5429 if (resolve_typebound_generic_call (e
, name
) == FAILURE
)
5431 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
5433 /* Take the rank from the function's symbol. */
5434 if (e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
)
5435 e
->rank
= e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
->rank
;
5437 /* For now, we simply transform it into an EXPR_FUNCTION call with the same
5438 arglist to the TBP's binding target. */
5440 if (resolve_typebound_static (e
, &target
, &newactual
) == FAILURE
)
5443 e
->value
.function
.actual
= newactual
;
5444 e
->value
.function
.name
= NULL
;
5445 e
->value
.function
.esym
= target
->n
.sym
;
5446 e
->value
.function
.isym
= NULL
;
5447 e
->symtree
= target
;
5448 e
->ts
= target
->n
.sym
->ts
;
5449 e
->expr_type
= EXPR_FUNCTION
;
5451 /* Resolution is not necessary if this is a class subroutine; this
5452 function only has to identify the specific proc. Resolution of
5453 the call will be done next in resolve_typebound_call. */
5454 return gfc_resolve_expr (e
);
5459 /* Resolve a typebound function, or 'method'. First separate all
5460 the non-CLASS references by calling resolve_compcall directly. */
5463 resolve_typebound_function (gfc_expr
* e
)
5465 gfc_symbol
*declared
;
5471 const char *genname
;
5476 return resolve_compcall (e
, NULL
);
5478 if (resolve_ref (e
) == FAILURE
)
5481 /* Get the CLASS declared type. */
5482 declared
= get_declared_from_expr (&class_ref
, &new_ref
, e
);
5484 /* Weed out cases of the ultimate component being a derived type. */
5485 if ((class_ref
&& class_ref
->u
.c
.component
->ts
.type
== BT_DERIVED
)
5486 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
5488 gfc_free_ref_list (new_ref
);
5489 return resolve_compcall (e
, NULL
);
5492 c
= gfc_find_component (declared
, "$data", true, true);
5493 declared
= c
->ts
.u
.derived
;
5495 /* Keep the generic name so that the vtab reference can be made. */
5497 if (e
->value
.compcall
.tbp
->is_generic
)
5498 genname
= e
->value
.compcall
.name
;
5500 /* Treat the call as if it is a typebound procedure, in order to roll
5501 out the correct name for the specific function. */
5502 if (resolve_compcall (e
, &name
) == FAILURE
)
5506 /* Then convert the expression to a procedure pointer component call. */
5507 e
->value
.function
.esym
= NULL
;
5513 /* '$vptr' points to the vtab, which contains the procedure pointers. */
5514 gfc_add_component_ref (e
, "$vptr");
5517 /* A generic procedure needs the subsidiary vtabs and vtypes for
5518 the specific procedures to have been build. */
5520 vtab
= gfc_find_derived_vtab (declared
, true);
5522 gfc_add_component_ref (e
, genname
);
5524 gfc_add_component_ref (e
, name
);
5526 /* Recover the typespec for the expression. This is really only
5527 necessary for generic procedures, where the additional call
5528 to gfc_add_component_ref seems to throw the collection of the
5529 correct typespec. */
5534 /* Resolve a typebound subroutine, or 'method'. First separate all
5535 the non-CLASS references by calling resolve_typebound_call
5539 resolve_typebound_subroutine (gfc_code
*code
)
5541 gfc_symbol
*declared
;
5546 const char *genname
;
5550 st
= code
->expr1
->symtree
;
5552 return resolve_typebound_call (code
, NULL
);
5554 if (resolve_ref (code
->expr1
) == FAILURE
)
5557 /* Get the CLASS declared type. */
5558 declared
= get_declared_from_expr (&class_ref
, &new_ref
, code
->expr1
);
5560 /* Weed out cases of the ultimate component being a derived type. */
5561 if ((class_ref
&& class_ref
->u
.c
.component
->ts
.type
== BT_DERIVED
)
5562 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
5564 gfc_free_ref_list (new_ref
);
5565 return resolve_typebound_call (code
, NULL
);
5568 c
= gfc_find_component (declared
, "$data", true, true);
5569 declared
= c
->ts
.u
.derived
;
5571 /* Keep the generic name so that the vtab reference can be made. */
5573 if (code
->expr1
->value
.compcall
.tbp
->is_generic
)
5574 genname
= code
->expr1
->value
.compcall
.name
;
5576 if (resolve_typebound_call (code
, &name
) == FAILURE
)
5578 ts
= code
->expr1
->ts
;
5580 /* Then convert the expression to a procedure pointer component call. */
5581 code
->expr1
->value
.function
.esym
= NULL
;
5582 code
->expr1
->symtree
= st
;
5585 code
->expr1
->ref
= new_ref
;
5587 /* '$vptr' points to the vtab, which contains the procedure pointers. */
5588 gfc_add_component_ref (code
->expr1
, "$vptr");
5591 /* A generic procedure needs the subsidiary vtabs and vtypes for
5592 the specific procedures to have been build. */
5594 vtab
= gfc_find_derived_vtab (declared
, true);
5596 gfc_add_component_ref (code
->expr1
, genname
);
5598 gfc_add_component_ref (code
->expr1
, name
);
5600 /* Recover the typespec for the expression. This is really only
5601 necessary for generic procedures, where the additional call
5602 to gfc_add_component_ref seems to throw the collection of the
5603 correct typespec. */
5604 code
->expr1
->ts
= ts
;
5609 /* Resolve a CALL to a Procedure Pointer Component (Subroutine). */
5612 resolve_ppc_call (gfc_code
* c
)
5614 gfc_component
*comp
;
5617 b
= gfc_is_proc_ptr_comp (c
->expr1
, &comp
);
5620 c
->resolved_sym
= c
->expr1
->symtree
->n
.sym
;
5621 c
->expr1
->expr_type
= EXPR_VARIABLE
;
5623 if (!comp
->attr
.subroutine
)
5624 gfc_add_subroutine (&comp
->attr
, comp
->name
, &c
->expr1
->where
);
5626 if (resolve_ref (c
->expr1
) == FAILURE
)
5629 if (update_ppc_arglist (c
->expr1
) == FAILURE
)
5632 c
->ext
.actual
= c
->expr1
->value
.compcall
.actual
;
5634 if (resolve_actual_arglist (c
->ext
.actual
, comp
->attr
.proc
,
5635 comp
->formal
== NULL
) == FAILURE
)
5638 gfc_ppc_use (comp
, &c
->expr1
->value
.compcall
.actual
, &c
->expr1
->where
);
5644 /* Resolve a Function Call to a Procedure Pointer Component (Function). */
5647 resolve_expr_ppc (gfc_expr
* e
)
5649 gfc_component
*comp
;
5652 b
= gfc_is_proc_ptr_comp (e
, &comp
);
5655 /* Convert to EXPR_FUNCTION. */
5656 e
->expr_type
= EXPR_FUNCTION
;
5657 e
->value
.function
.isym
= NULL
;
5658 e
->value
.function
.actual
= e
->value
.compcall
.actual
;
5660 if (comp
->as
!= NULL
)
5661 e
->rank
= comp
->as
->rank
;
5663 if (!comp
->attr
.function
)
5664 gfc_add_function (&comp
->attr
, comp
->name
, &e
->where
);
5666 if (resolve_ref (e
) == FAILURE
)
5669 if (resolve_actual_arglist (e
->value
.function
.actual
, comp
->attr
.proc
,
5670 comp
->formal
== NULL
) == FAILURE
)
5673 if (update_ppc_arglist (e
) == FAILURE
)
5676 gfc_ppc_use (comp
, &e
->value
.compcall
.actual
, &e
->where
);
5683 gfc_is_expandable_expr (gfc_expr
*e
)
5685 gfc_constructor
*con
;
5687 if (e
->expr_type
== EXPR_ARRAY
)
5689 /* Traverse the constructor looking for variables that are flavor
5690 parameter. Parameters must be expanded since they are fully used at
5692 con
= gfc_constructor_first (e
->value
.constructor
);
5693 for (; con
; con
= gfc_constructor_next (con
))
5695 if (con
->expr
->expr_type
== EXPR_VARIABLE
5696 && con
->expr
->symtree
5697 && (con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
5698 || con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_VARIABLE
))
5700 if (con
->expr
->expr_type
== EXPR_ARRAY
5701 && gfc_is_expandable_expr (con
->expr
))
5709 /* Resolve an expression. That is, make sure that types of operands agree
5710 with their operators, intrinsic operators are converted to function calls
5711 for overloaded types and unresolved function references are resolved. */
5714 gfc_resolve_expr (gfc_expr
*e
)
5722 /* inquiry_argument only applies to variables. */
5723 inquiry_save
= inquiry_argument
;
5724 if (e
->expr_type
!= EXPR_VARIABLE
)
5725 inquiry_argument
= false;
5727 switch (e
->expr_type
)
5730 t
= resolve_operator (e
);
5736 if (check_host_association (e
))
5737 t
= resolve_function (e
);
5740 t
= resolve_variable (e
);
5742 expression_rank (e
);
5745 if (e
->ts
.type
== BT_CHARACTER
&& e
->ts
.u
.cl
== NULL
&& e
->ref
5746 && e
->ref
->type
!= REF_SUBSTRING
)
5747 gfc_resolve_substring_charlen (e
);
5752 t
= resolve_typebound_function (e
);
5755 case EXPR_SUBSTRING
:
5756 t
= resolve_ref (e
);
5765 t
= resolve_expr_ppc (e
);
5770 if (resolve_ref (e
) == FAILURE
)
5773 t
= gfc_resolve_array_constructor (e
);
5774 /* Also try to expand a constructor. */
5777 expression_rank (e
);
5778 if (gfc_is_constant_expr (e
) || gfc_is_expandable_expr (e
))
5779 gfc_expand_constructor (e
);
5782 /* This provides the opportunity for the length of constructors with
5783 character valued function elements to propagate the string length
5784 to the expression. */
5785 if (t
== SUCCESS
&& e
->ts
.type
== BT_CHARACTER
)
5787 /* For efficiency, we call gfc_expand_constructor for BT_CHARACTER
5788 here rather then add a duplicate test for it above. */
5789 gfc_expand_constructor (e
);
5790 t
= gfc_resolve_character_array_constructor (e
);
5795 case EXPR_STRUCTURE
:
5796 t
= resolve_ref (e
);
5800 t
= resolve_structure_cons (e
);
5804 t
= gfc_simplify_expr (e
, 0);
5808 gfc_internal_error ("gfc_resolve_expr(): Bad expression type");
5811 if (e
->ts
.type
== BT_CHARACTER
&& t
== SUCCESS
&& !e
->ts
.u
.cl
)
5814 inquiry_argument
= inquiry_save
;
5820 /* Resolve an expression from an iterator. They must be scalar and have
5821 INTEGER or (optionally) REAL type. */
5824 gfc_resolve_iterator_expr (gfc_expr
*expr
, bool real_ok
,
5825 const char *name_msgid
)
5827 if (gfc_resolve_expr (expr
) == FAILURE
)
5830 if (expr
->rank
!= 0)
5832 gfc_error ("%s at %L must be a scalar", _(name_msgid
), &expr
->where
);
5836 if (expr
->ts
.type
!= BT_INTEGER
)
5838 if (expr
->ts
.type
== BT_REAL
)
5841 return gfc_notify_std (GFC_STD_F95_DEL
,
5842 "Deleted feature: %s at %L must be integer",
5843 _(name_msgid
), &expr
->where
);
5846 gfc_error ("%s at %L must be INTEGER", _(name_msgid
),
5853 gfc_error ("%s at %L must be INTEGER", _(name_msgid
), &expr
->where
);
5861 /* Resolve the expressions in an iterator structure. If REAL_OK is
5862 false allow only INTEGER type iterators, otherwise allow REAL types. */
5865 gfc_resolve_iterator (gfc_iterator
*iter
, bool real_ok
)
5867 if (gfc_resolve_iterator_expr (iter
->var
, real_ok
, "Loop variable")
5871 if (gfc_pure (NULL
) && gfc_impure_variable (iter
->var
->symtree
->n
.sym
))
5873 gfc_error ("Cannot assign to loop variable in PURE procedure at %L",
5878 if (gfc_resolve_iterator_expr (iter
->start
, real_ok
,
5879 "Start expression in DO loop") == FAILURE
)
5882 if (gfc_resolve_iterator_expr (iter
->end
, real_ok
,
5883 "End expression in DO loop") == FAILURE
)
5886 if (gfc_resolve_iterator_expr (iter
->step
, real_ok
,
5887 "Step expression in DO loop") == FAILURE
)
5890 if (iter
->step
->expr_type
== EXPR_CONSTANT
)
5892 if ((iter
->step
->ts
.type
== BT_INTEGER
5893 && mpz_cmp_ui (iter
->step
->value
.integer
, 0) == 0)
5894 || (iter
->step
->ts
.type
== BT_REAL
5895 && mpfr_sgn (iter
->step
->value
.real
) == 0))
5897 gfc_error ("Step expression in DO loop at %L cannot be zero",
5898 &iter
->step
->where
);
5903 /* Convert start, end, and step to the same type as var. */
5904 if (iter
->start
->ts
.kind
!= iter
->var
->ts
.kind
5905 || iter
->start
->ts
.type
!= iter
->var
->ts
.type
)
5906 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 2);
5908 if (iter
->end
->ts
.kind
!= iter
->var
->ts
.kind
5909 || iter
->end
->ts
.type
!= iter
->var
->ts
.type
)
5910 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 2);
5912 if (iter
->step
->ts
.kind
!= iter
->var
->ts
.kind
5913 || iter
->step
->ts
.type
!= iter
->var
->ts
.type
)
5914 gfc_convert_type (iter
->step
, &iter
->var
->ts
, 2);
5916 if (iter
->start
->expr_type
== EXPR_CONSTANT
5917 && iter
->end
->expr_type
== EXPR_CONSTANT
5918 && iter
->step
->expr_type
== EXPR_CONSTANT
)
5921 if (iter
->start
->ts
.type
== BT_INTEGER
)
5923 sgn
= mpz_cmp_ui (iter
->step
->value
.integer
, 0);
5924 cmp
= mpz_cmp (iter
->end
->value
.integer
, iter
->start
->value
.integer
);
5928 sgn
= mpfr_sgn (iter
->step
->value
.real
);
5929 cmp
= mpfr_cmp (iter
->end
->value
.real
, iter
->start
->value
.real
);
5931 if ((sgn
> 0 && cmp
< 0) || (sgn
< 0 && cmp
> 0))
5932 gfc_warning ("DO loop at %L will be executed zero times",
5933 &iter
->step
->where
);
5940 /* Traversal function for find_forall_index. f == 2 signals that
5941 that variable itself is not to be checked - only the references. */
5944 forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int *f
)
5946 if (expr
->expr_type
!= EXPR_VARIABLE
)
5949 /* A scalar assignment */
5950 if (!expr
->ref
|| *f
== 1)
5952 if (expr
->symtree
->n
.sym
== sym
)
5964 /* Check whether the FORALL index appears in the expression or not.
5965 Returns SUCCESS if SYM is found in EXPR. */
5968 find_forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int f
)
5970 if (gfc_traverse_expr (expr
, sym
, forall_index
, f
))
5977 /* Resolve a list of FORALL iterators. The FORALL index-name is constrained
5978 to be a scalar INTEGER variable. The subscripts and stride are scalar
5979 INTEGERs, and if stride is a constant it must be nonzero.
5980 Furthermore "A subscript or stride in a forall-triplet-spec shall
5981 not contain a reference to any index-name in the
5982 forall-triplet-spec-list in which it appears." (7.5.4.1) */
5985 resolve_forall_iterators (gfc_forall_iterator
*it
)
5987 gfc_forall_iterator
*iter
, *iter2
;
5989 for (iter
= it
; iter
; iter
= iter
->next
)
5991 if (gfc_resolve_expr (iter
->var
) == SUCCESS
5992 && (iter
->var
->ts
.type
!= BT_INTEGER
|| iter
->var
->rank
!= 0))
5993 gfc_error ("FORALL index-name at %L must be a scalar INTEGER",
5996 if (gfc_resolve_expr (iter
->start
) == SUCCESS
5997 && (iter
->start
->ts
.type
!= BT_INTEGER
|| iter
->start
->rank
!= 0))
5998 gfc_error ("FORALL start expression at %L must be a scalar INTEGER",
5999 &iter
->start
->where
);
6000 if (iter
->var
->ts
.kind
!= iter
->start
->ts
.kind
)
6001 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 2);
6003 if (gfc_resolve_expr (iter
->end
) == SUCCESS
6004 && (iter
->end
->ts
.type
!= BT_INTEGER
|| iter
->end
->rank
!= 0))
6005 gfc_error ("FORALL end expression at %L must be a scalar INTEGER",
6007 if (iter
->var
->ts
.kind
!= iter
->end
->ts
.kind
)
6008 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 2);
6010 if (gfc_resolve_expr (iter
->stride
) == SUCCESS
)
6012 if (iter
->stride
->ts
.type
!= BT_INTEGER
|| iter
->stride
->rank
!= 0)
6013 gfc_error ("FORALL stride expression at %L must be a scalar %s",
6014 &iter
->stride
->where
, "INTEGER");
6016 if (iter
->stride
->expr_type
== EXPR_CONSTANT
6017 && mpz_cmp_ui(iter
->stride
->value
.integer
, 0) == 0)
6018 gfc_error ("FORALL stride expression at %L cannot be zero",
6019 &iter
->stride
->where
);
6021 if (iter
->var
->ts
.kind
!= iter
->stride
->ts
.kind
)
6022 gfc_convert_type (iter
->stride
, &iter
->var
->ts
, 2);
6025 for (iter
= it
; iter
; iter
= iter
->next
)
6026 for (iter2
= iter
; iter2
; iter2
= iter2
->next
)
6028 if (find_forall_index (iter2
->start
,
6029 iter
->var
->symtree
->n
.sym
, 0) == SUCCESS
6030 || find_forall_index (iter2
->end
,
6031 iter
->var
->symtree
->n
.sym
, 0) == SUCCESS
6032 || find_forall_index (iter2
->stride
,
6033 iter
->var
->symtree
->n
.sym
, 0) == SUCCESS
)
6034 gfc_error ("FORALL index '%s' may not appear in triplet "
6035 "specification at %L", iter
->var
->symtree
->name
,
6036 &iter2
->start
->where
);
6041 /* Given a pointer to a symbol that is a derived type, see if it's
6042 inaccessible, i.e. if it's defined in another module and the components are
6043 PRIVATE. The search is recursive if necessary. Returns zero if no
6044 inaccessible components are found, nonzero otherwise. */
6047 derived_inaccessible (gfc_symbol
*sym
)
6051 if (sym
->attr
.use_assoc
&& sym
->attr
.private_comp
)
6054 for (c
= sym
->components
; c
; c
= c
->next
)
6056 if (c
->ts
.type
== BT_DERIVED
&& derived_inaccessible (c
->ts
.u
.derived
))
6064 /* Resolve the argument of a deallocate expression. The expression must be
6065 a pointer or a full array. */
6068 resolve_deallocate_expr (gfc_expr
*e
)
6070 symbol_attribute attr
;
6071 int allocatable
, pointer
, check_intent_in
;
6076 /* Check INTENT(IN), unless the object is a sub-component of a pointer. */
6077 check_intent_in
= 1;
6079 if (gfc_resolve_expr (e
) == FAILURE
)
6082 if (e
->expr_type
!= EXPR_VARIABLE
)
6085 sym
= e
->symtree
->n
.sym
;
6087 if (sym
->ts
.type
== BT_CLASS
)
6089 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
6090 pointer
= CLASS_DATA (sym
)->attr
.pointer
;
6094 allocatable
= sym
->attr
.allocatable
;
6095 pointer
= sym
->attr
.pointer
;
6097 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
6100 check_intent_in
= 0;
6105 if (ref
->u
.ar
.type
!= AR_FULL
)
6110 c
= ref
->u
.c
.component
;
6111 if (c
->ts
.type
== BT_CLASS
)
6113 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
6114 pointer
= CLASS_DATA (c
)->attr
.pointer
;
6118 allocatable
= c
->attr
.allocatable
;
6119 pointer
= c
->attr
.pointer
;
6129 attr
= gfc_expr_attr (e
);
6131 if (allocatable
== 0 && attr
.pointer
== 0)
6134 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
6139 if (check_intent_in
&& sym
->attr
.intent
== INTENT_IN
)
6141 gfc_error ("Cannot deallocate INTENT(IN) variable '%s' at %L",
6142 sym
->name
, &e
->where
);
6146 if (e
->ts
.type
== BT_CLASS
)
6148 /* Only deallocate the DATA component. */
6149 gfc_add_component_ref (e
, "$data");
6156 /* Returns true if the expression e contains a reference to the symbol sym. */
6158 sym_in_expr (gfc_expr
*e
, gfc_symbol
*sym
, int *f ATTRIBUTE_UNUSED
)
6160 if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
== sym
)
6167 gfc_find_sym_in_expr (gfc_symbol
*sym
, gfc_expr
*e
)
6169 return gfc_traverse_expr (e
, sym
, sym_in_expr
, 0);
6173 /* Given the expression node e for an allocatable/pointer of derived type to be
6174 allocated, get the expression node to be initialized afterwards (needed for
6175 derived types with default initializers, and derived types with allocatable
6176 components that need nullification.) */
6179 gfc_expr_to_initialize (gfc_expr
*e
)
6185 result
= gfc_copy_expr (e
);
6187 /* Change the last array reference from AR_ELEMENT to AR_FULL. */
6188 for (ref
= result
->ref
; ref
; ref
= ref
->next
)
6189 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
6191 ref
->u
.ar
.type
= AR_FULL
;
6193 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
6194 ref
->u
.ar
.start
[i
] = ref
->u
.ar
.end
[i
] = ref
->u
.ar
.stride
[i
] = NULL
;
6196 result
->rank
= ref
->u
.ar
.dimen
;
6204 /* Used in resolve_allocate_expr to check that a allocation-object and
6205 a source-expr are conformable. This does not catch all possible
6206 cases; in particular a runtime checking is needed. */
6209 conformable_arrays (gfc_expr
*e1
, gfc_expr
*e2
)
6212 for (tail
= e2
->ref
; tail
&& tail
->next
; tail
= tail
->next
);
6214 /* First compare rank. */
6215 if (tail
&& e1
->rank
!= tail
->u
.ar
.as
->rank
)
6217 gfc_error ("Source-expr at %L must be scalar or have the "
6218 "same rank as the allocate-object at %L",
6219 &e1
->where
, &e2
->where
);
6230 for (i
= 0; i
< e1
->rank
; i
++)
6232 if (tail
->u
.ar
.end
[i
])
6234 mpz_set (s
, tail
->u
.ar
.end
[i
]->value
.integer
);
6235 mpz_sub (s
, s
, tail
->u
.ar
.start
[i
]->value
.integer
);
6236 mpz_add_ui (s
, s
, 1);
6240 mpz_set (s
, tail
->u
.ar
.start
[i
]->value
.integer
);
6243 if (mpz_cmp (e1
->shape
[i
], s
) != 0)
6245 gfc_error ("Source-expr at %L and allocate-object at %L must "
6246 "have the same shape", &e1
->where
, &e2
->where
);
6259 /* Resolve the expression in an ALLOCATE statement, doing the additional
6260 checks to see whether the expression is OK or not. The expression must
6261 have a trailing array reference that gives the size of the array. */
6264 resolve_allocate_expr (gfc_expr
*e
, gfc_code
*code
)
6266 int i
, pointer
, allocatable
, dimension
, check_intent_in
, is_abstract
;
6268 symbol_attribute attr
;
6269 gfc_ref
*ref
, *ref2
;
6271 gfc_symbol
*sym
= NULL
;
6275 /* Check INTENT(IN), unless the object is a sub-component of a pointer. */
6276 check_intent_in
= 1;
6278 /* Mark the ultimost array component as being in allocate to allow DIMEN_STAR
6279 checking of coarrays. */
6280 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
6281 if (ref
->next
== NULL
)
6284 if (ref
&& ref
->type
== REF_ARRAY
)
6285 ref
->u
.ar
.in_allocate
= true;
6287 if (gfc_resolve_expr (e
) == FAILURE
)
6290 /* Make sure the expression is allocatable or a pointer. If it is
6291 pointer, the next-to-last reference must be a pointer. */
6295 sym
= e
->symtree
->n
.sym
;
6297 /* Check whether ultimate component is abstract and CLASS. */
6300 if (e
->expr_type
!= EXPR_VARIABLE
)
6303 attr
= gfc_expr_attr (e
);
6304 pointer
= attr
.pointer
;
6305 dimension
= attr
.dimension
;
6306 codimension
= attr
.codimension
;
6310 if (sym
->ts
.type
== BT_CLASS
)
6312 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
6313 pointer
= CLASS_DATA (sym
)->attr
.pointer
;
6314 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
6315 codimension
= CLASS_DATA (sym
)->attr
.codimension
;
6316 is_abstract
= CLASS_DATA (sym
)->attr
.abstract
;
6320 allocatable
= sym
->attr
.allocatable
;
6321 pointer
= sym
->attr
.pointer
;
6322 dimension
= sym
->attr
.dimension
;
6323 codimension
= sym
->attr
.codimension
;
6326 for (ref
= e
->ref
; ref
; ref2
= ref
, ref
= ref
->next
)
6329 check_intent_in
= 0;
6334 if (ref
->next
!= NULL
)
6340 if (gfc_is_coindexed (e
))
6342 gfc_error ("Coindexed allocatable object at %L",
6347 c
= ref
->u
.c
.component
;
6348 if (c
->ts
.type
== BT_CLASS
)
6350 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
6351 pointer
= CLASS_DATA (c
)->attr
.pointer
;
6352 dimension
= CLASS_DATA (c
)->attr
.dimension
;
6353 codimension
= CLASS_DATA (c
)->attr
.codimension
;
6354 is_abstract
= CLASS_DATA (c
)->attr
.abstract
;
6358 allocatable
= c
->attr
.allocatable
;
6359 pointer
= c
->attr
.pointer
;
6360 dimension
= c
->attr
.dimension
;
6361 codimension
= c
->attr
.codimension
;
6362 is_abstract
= c
->attr
.abstract
;
6374 if (allocatable
== 0 && pointer
== 0)
6376 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
6381 /* Some checks for the SOURCE tag. */
6384 /* Check F03:C631. */
6385 if (!gfc_type_compatible (&e
->ts
, &code
->expr3
->ts
))
6387 gfc_error ("Type of entity at %L is type incompatible with "
6388 "source-expr at %L", &e
->where
, &code
->expr3
->where
);
6392 /* Check F03:C632 and restriction following Note 6.18. */
6393 if (code
->expr3
->rank
> 0
6394 && conformable_arrays (code
->expr3
, e
) == FAILURE
)
6397 /* Check F03:C633. */
6398 if (code
->expr3
->ts
.kind
!= e
->ts
.kind
)
6400 gfc_error ("The allocate-object at %L and the source-expr at %L "
6401 "shall have the same kind type parameter",
6402 &e
->where
, &code
->expr3
->where
);
6407 /* Check F08:C629. */
6408 if (is_abstract
&& code
->ext
.alloc
.ts
.type
== BT_UNKNOWN
6411 gcc_assert (e
->ts
.type
== BT_CLASS
);
6412 gfc_error ("Allocating %s of ABSTRACT base type at %L requires a "
6413 "type-spec or source-expr", sym
->name
, &e
->where
);
6417 if (check_intent_in
&& sym
->attr
.intent
== INTENT_IN
)
6419 gfc_error ("Cannot allocate INTENT(IN) variable '%s' at %L",
6420 sym
->name
, &e
->where
);
6424 if (!code
->expr3
|| code
->expr3
->mold
)
6426 /* Add default initializer for those derived types that need them. */
6427 gfc_expr
*init_e
= NULL
;
6430 if (code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
6431 ts
= code
->ext
.alloc
.ts
;
6432 else if (code
->expr3
)
6433 ts
= code
->expr3
->ts
;
6437 if (ts
.type
== BT_DERIVED
)
6438 init_e
= gfc_default_initializer (&ts
);
6439 /* FIXME: Use default init of dynamic type (cf. PR 44541). */
6440 else if (e
->ts
.type
== BT_CLASS
)
6441 init_e
= gfc_default_initializer (&ts
.u
.derived
->components
->ts
);
6445 gfc_code
*init_st
= gfc_get_code ();
6446 init_st
->loc
= code
->loc
;
6447 init_st
->op
= EXEC_INIT_ASSIGN
;
6448 init_st
->expr1
= gfc_expr_to_initialize (e
);
6449 init_st
->expr2
= init_e
;
6450 init_st
->next
= code
->next
;
6451 code
->next
= init_st
;
6455 if (pointer
|| (dimension
== 0 && codimension
== 0))
6458 /* Make sure the next-to-last reference node is an array specification. */
6460 if (ref2
== NULL
|| ref2
->type
!= REF_ARRAY
|| ref2
->u
.ar
.type
== AR_FULL
6461 || (dimension
&& ref2
->u
.ar
.dimen
== 0))
6463 gfc_error ("Array specification required in ALLOCATE statement "
6464 "at %L", &e
->where
);
6468 /* Make sure that the array section reference makes sense in the
6469 context of an ALLOCATE specification. */
6473 if (codimension
&& ar
->codimen
== 0)
6475 gfc_error ("Coarray specification required in ALLOCATE statement "
6476 "at %L", &e
->where
);
6480 for (i
= 0; i
< ar
->dimen
; i
++)
6482 if (ref2
->u
.ar
.type
== AR_ELEMENT
)
6485 switch (ar
->dimen_type
[i
])
6491 if (ar
->start
[i
] != NULL
6492 && ar
->end
[i
] != NULL
6493 && ar
->stride
[i
] == NULL
)
6496 /* Fall Through... */
6501 gfc_error ("Bad array specification in ALLOCATE statement at %L",
6507 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
6509 sym
= a
->expr
->symtree
->n
.sym
;
6511 /* TODO - check derived type components. */
6512 if (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
)
6515 if ((ar
->start
[i
] != NULL
6516 && gfc_find_sym_in_expr (sym
, ar
->start
[i
]))
6517 || (ar
->end
[i
] != NULL
6518 && gfc_find_sym_in_expr (sym
, ar
->end
[i
])))
6520 gfc_error ("'%s' must not appear in the array specification at "
6521 "%L in the same ALLOCATE statement where it is "
6522 "itself allocated", sym
->name
, &ar
->where
);
6528 for (i
= ar
->dimen
; i
< ar
->codimen
+ ar
->dimen
; i
++)
6530 if (ar
->dimen_type
[i
] == DIMEN_ELEMENT
6531 || ar
->dimen_type
[i
] == DIMEN_RANGE
)
6533 if (i
== (ar
->dimen
+ ar
->codimen
- 1))
6535 gfc_error ("Expected '*' in coindex specification in ALLOCATE "
6536 "statement at %L", &e
->where
);
6542 if (ar
->dimen_type
[i
] == DIMEN_STAR
&& i
== (ar
->dimen
+ ar
->codimen
- 1)
6543 && ar
->stride
[i
] == NULL
)
6546 gfc_error ("Bad coarray specification in ALLOCATE statement at %L",
6551 if (codimension
&& ar
->as
->rank
== 0)
6553 gfc_error ("Sorry, allocatable scalar coarrays are not yet supported "
6554 "at %L", &e
->where
);
6566 resolve_allocate_deallocate (gfc_code
*code
, const char *fcn
)
6568 gfc_expr
*stat
, *errmsg
, *pe
, *qe
;
6569 gfc_alloc
*a
, *p
, *q
;
6571 stat
= code
->expr1
? code
->expr1
: NULL
;
6573 errmsg
= code
->expr2
? code
->expr2
: NULL
;
6575 /* Check the stat variable. */
6578 if (stat
->symtree
->n
.sym
->attr
.intent
== INTENT_IN
)
6579 gfc_error ("Stat-variable '%s' at %L cannot be INTENT(IN)",
6580 stat
->symtree
->n
.sym
->name
, &stat
->where
);
6582 if (gfc_pure (NULL
) && gfc_impure_variable (stat
->symtree
->n
.sym
))
6583 gfc_error ("Illegal stat-variable at %L for a PURE procedure",
6586 if ((stat
->ts
.type
!= BT_INTEGER
6587 && !(stat
->ref
&& (stat
->ref
->type
== REF_ARRAY
6588 || stat
->ref
->type
== REF_COMPONENT
)))
6590 gfc_error ("Stat-variable at %L must be a scalar INTEGER "
6591 "variable", &stat
->where
);
6593 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
6594 if (p
->expr
->symtree
->n
.sym
->name
== stat
->symtree
->n
.sym
->name
)
6596 gfc_ref
*ref1
, *ref2
;
6599 for (ref1
= p
->expr
->ref
, ref2
= stat
->ref
; ref1
&& ref2
;
6600 ref1
= ref1
->next
, ref2
= ref2
->next
)
6602 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
6604 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
6613 gfc_error ("Stat-variable at %L shall not be %sd within "
6614 "the same %s statement", &stat
->where
, fcn
, fcn
);
6620 /* Check the errmsg variable. */
6624 gfc_warning ("ERRMSG at %L is useless without a STAT tag",
6627 if (errmsg
->symtree
->n
.sym
->attr
.intent
== INTENT_IN
)
6628 gfc_error ("Errmsg-variable '%s' at %L cannot be INTENT(IN)",
6629 errmsg
->symtree
->n
.sym
->name
, &errmsg
->where
);
6631 if (gfc_pure (NULL
) && gfc_impure_variable (errmsg
->symtree
->n
.sym
))
6632 gfc_error ("Illegal errmsg-variable at %L for a PURE procedure",
6635 if ((errmsg
->ts
.type
!= BT_CHARACTER
6637 && (errmsg
->ref
->type
== REF_ARRAY
6638 || errmsg
->ref
->type
== REF_COMPONENT
)))
6639 || errmsg
->rank
> 0 )
6640 gfc_error ("Errmsg-variable at %L must be a scalar CHARACTER "
6641 "variable", &errmsg
->where
);
6643 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
6644 if (p
->expr
->symtree
->n
.sym
->name
== errmsg
->symtree
->n
.sym
->name
)
6646 gfc_ref
*ref1
, *ref2
;
6649 for (ref1
= p
->expr
->ref
, ref2
= errmsg
->ref
; ref1
&& ref2
;
6650 ref1
= ref1
->next
, ref2
= ref2
->next
)
6652 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
6654 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
6663 gfc_error ("Errmsg-variable at %L shall not be %sd within "
6664 "the same %s statement", &errmsg
->where
, fcn
, fcn
);
6670 /* Check that an allocate-object appears only once in the statement.
6671 FIXME: Checking derived types is disabled. */
6672 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
6675 if ((pe
->ref
&& pe
->ref
->type
!= REF_COMPONENT
)
6676 && (pe
->symtree
->n
.sym
->ts
.type
!= BT_DERIVED
))
6678 for (q
= p
->next
; q
; q
= q
->next
)
6681 if ((qe
->ref
&& qe
->ref
->type
!= REF_COMPONENT
)
6682 && (qe
->symtree
->n
.sym
->ts
.type
!= BT_DERIVED
)
6683 && (pe
->symtree
->n
.sym
->name
== qe
->symtree
->n
.sym
->name
))
6684 gfc_error ("Allocate-object at %L also appears at %L",
6685 &pe
->where
, &qe
->where
);
6690 if (strcmp (fcn
, "ALLOCATE") == 0)
6692 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
6693 resolve_allocate_expr (a
->expr
, code
);
6697 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
6698 resolve_deallocate_expr (a
->expr
);
6703 /************ SELECT CASE resolution subroutines ************/
6705 /* Callback function for our mergesort variant. Determines interval
6706 overlaps for CASEs. Return <0 if op1 < op2, 0 for overlap, >0 for
6707 op1 > op2. Assumes we're not dealing with the default case.
6708 We have op1 = (:L), (K:L) or (K:) and op2 = (:N), (M:N) or (M:).
6709 There are nine situations to check. */
6712 compare_cases (const gfc_case
*op1
, const gfc_case
*op2
)
6716 if (op1
->low
== NULL
) /* op1 = (:L) */
6718 /* op2 = (:N), so overlap. */
6720 /* op2 = (M:) or (M:N), L < M */
6721 if (op2
->low
!= NULL
6722 && gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
6725 else if (op1
->high
== NULL
) /* op1 = (K:) */
6727 /* op2 = (M:), so overlap. */
6729 /* op2 = (:N) or (M:N), K > N */
6730 if (op2
->high
!= NULL
6731 && gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
6734 else /* op1 = (K:L) */
6736 if (op2
->low
== NULL
) /* op2 = (:N), K > N */
6737 retval
= (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
6739 else if (op2
->high
== NULL
) /* op2 = (M:), L < M */
6740 retval
= (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
6742 else /* op2 = (M:N) */
6746 if (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
6749 else if (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
6758 /* Merge-sort a double linked case list, detecting overlap in the
6759 process. LIST is the head of the double linked case list before it
6760 is sorted. Returns the head of the sorted list if we don't see any
6761 overlap, or NULL otherwise. */
6764 check_case_overlap (gfc_case
*list
)
6766 gfc_case
*p
, *q
, *e
, *tail
;
6767 int insize
, nmerges
, psize
, qsize
, cmp
, overlap_seen
;
6769 /* If the passed list was empty, return immediately. */
6776 /* Loop unconditionally. The only exit from this loop is a return
6777 statement, when we've finished sorting the case list. */
6784 /* Count the number of merges we do in this pass. */
6787 /* Loop while there exists a merge to be done. */
6792 /* Count this merge. */
6795 /* Cut the list in two pieces by stepping INSIZE places
6796 forward in the list, starting from P. */
6799 for (i
= 0; i
< insize
; i
++)
6808 /* Now we have two lists. Merge them! */
6809 while (psize
> 0 || (qsize
> 0 && q
!= NULL
))
6811 /* See from which the next case to merge comes from. */
6814 /* P is empty so the next case must come from Q. */
6819 else if (qsize
== 0 || q
== NULL
)
6828 cmp
= compare_cases (p
, q
);
6831 /* The whole case range for P is less than the
6839 /* The whole case range for Q is greater than
6840 the case range for P. */
6847 /* The cases overlap, or they are the same
6848 element in the list. Either way, we must
6849 issue an error and get the next case from P. */
6850 /* FIXME: Sort P and Q by line number. */
6851 gfc_error ("CASE label at %L overlaps with CASE "
6852 "label at %L", &p
->where
, &q
->where
);
6860 /* Add the next element to the merged list. */
6869 /* P has now stepped INSIZE places along, and so has Q. So
6870 they're the same. */
6875 /* If we have done only one merge or none at all, we've
6876 finished sorting the cases. */
6885 /* Otherwise repeat, merging lists twice the size. */
6891 /* Check to see if an expression is suitable for use in a CASE statement.
6892 Makes sure that all case expressions are scalar constants of the same
6893 type. Return FAILURE if anything is wrong. */
6896 validate_case_label_expr (gfc_expr
*e
, gfc_expr
*case_expr
)
6898 if (e
== NULL
) return SUCCESS
;
6900 if (e
->ts
.type
!= case_expr
->ts
.type
)
6902 gfc_error ("Expression in CASE statement at %L must be of type %s",
6903 &e
->where
, gfc_basic_typename (case_expr
->ts
.type
));
6907 /* C805 (R808) For a given case-construct, each case-value shall be of
6908 the same type as case-expr. For character type, length differences
6909 are allowed, but the kind type parameters shall be the same. */
6911 if (case_expr
->ts
.type
== BT_CHARACTER
&& e
->ts
.kind
!= case_expr
->ts
.kind
)
6913 gfc_error ("Expression in CASE statement at %L must be of kind %d",
6914 &e
->where
, case_expr
->ts
.kind
);
6918 /* Convert the case value kind to that of case expression kind,
6921 if (e
->ts
.kind
!= case_expr
->ts
.kind
)
6922 gfc_convert_type_warn (e
, &case_expr
->ts
, 2, 0);
6926 gfc_error ("Expression in CASE statement at %L must be scalar",
6935 /* Given a completely parsed select statement, we:
6937 - Validate all expressions and code within the SELECT.
6938 - Make sure that the selection expression is not of the wrong type.
6939 - Make sure that no case ranges overlap.
6940 - Eliminate unreachable cases and unreachable code resulting from
6941 removing case labels.
6943 The standard does allow unreachable cases, e.g. CASE (5:3). But
6944 they are a hassle for code generation, and to prevent that, we just
6945 cut them out here. This is not necessary for overlapping cases
6946 because they are illegal and we never even try to generate code.
6948 We have the additional caveat that a SELECT construct could have
6949 been a computed GOTO in the source code. Fortunately we can fairly
6950 easily work around that here: The case_expr for a "real" SELECT CASE
6951 is in code->expr1, but for a computed GOTO it is in code->expr2. All
6952 we have to do is make sure that the case_expr is a scalar integer
6956 resolve_select (gfc_code
*code
)
6959 gfc_expr
*case_expr
;
6960 gfc_case
*cp
, *default_case
, *tail
, *head
;
6961 int seen_unreachable
;
6967 if (code
->expr1
== NULL
)
6969 /* This was actually a computed GOTO statement. */
6970 case_expr
= code
->expr2
;
6971 if (case_expr
->ts
.type
!= BT_INTEGER
|| case_expr
->rank
!= 0)
6972 gfc_error ("Selection expression in computed GOTO statement "
6973 "at %L must be a scalar integer expression",
6976 /* Further checking is not necessary because this SELECT was built
6977 by the compiler, so it should always be OK. Just move the
6978 case_expr from expr2 to expr so that we can handle computed
6979 GOTOs as normal SELECTs from here on. */
6980 code
->expr1
= code
->expr2
;
6985 case_expr
= code
->expr1
;
6987 type
= case_expr
->ts
.type
;
6988 if (type
!= BT_LOGICAL
&& type
!= BT_INTEGER
&& type
!= BT_CHARACTER
)
6990 gfc_error ("Argument of SELECT statement at %L cannot be %s",
6991 &case_expr
->where
, gfc_typename (&case_expr
->ts
));
6993 /* Punt. Going on here just produce more garbage error messages. */
6997 if (case_expr
->rank
!= 0)
6999 gfc_error ("Argument of SELECT statement at %L must be a scalar "
7000 "expression", &case_expr
->where
);
7007 /* Raise a warning if an INTEGER case value exceeds the range of
7008 the case-expr. Later, all expressions will be promoted to the
7009 largest kind of all case-labels. */
7011 if (type
== BT_INTEGER
)
7012 for (body
= code
->block
; body
; body
= body
->block
)
7013 for (cp
= body
->ext
.case_list
; cp
; cp
= cp
->next
)
7016 && gfc_check_integer_range (cp
->low
->value
.integer
,
7017 case_expr
->ts
.kind
) != ARITH_OK
)
7018 gfc_warning ("Expression in CASE statement at %L is "
7019 "not in the range of %s", &cp
->low
->where
,
7020 gfc_typename (&case_expr
->ts
));
7023 && cp
->low
!= cp
->high
7024 && gfc_check_integer_range (cp
->high
->value
.integer
,
7025 case_expr
->ts
.kind
) != ARITH_OK
)
7026 gfc_warning ("Expression in CASE statement at %L is "
7027 "not in the range of %s", &cp
->high
->where
,
7028 gfc_typename (&case_expr
->ts
));
7031 /* PR 19168 has a long discussion concerning a mismatch of the kinds
7032 of the SELECT CASE expression and its CASE values. Walk the lists
7033 of case values, and if we find a mismatch, promote case_expr to
7034 the appropriate kind. */
7036 if (type
== BT_LOGICAL
|| type
== BT_INTEGER
)
7038 for (body
= code
->block
; body
; body
= body
->block
)
7040 /* Walk the case label list. */
7041 for (cp
= body
->ext
.case_list
; cp
; cp
= cp
->next
)
7043 /* Intercept the DEFAULT case. It does not have a kind. */
7044 if (cp
->low
== NULL
&& cp
->high
== NULL
)
7047 /* Unreachable case ranges are discarded, so ignore. */
7048 if (cp
->low
!= NULL
&& cp
->high
!= NULL
7049 && cp
->low
!= cp
->high
7050 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
7054 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->low
))
7055 gfc_convert_type_warn (case_expr
, &cp
->low
->ts
, 2, 0);
7057 if (cp
->high
!= NULL
7058 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->high
))
7059 gfc_convert_type_warn (case_expr
, &cp
->high
->ts
, 2, 0);
7064 /* Assume there is no DEFAULT case. */
7065 default_case
= NULL
;
7070 for (body
= code
->block
; body
; body
= body
->block
)
7072 /* Assume the CASE list is OK, and all CASE labels can be matched. */
7074 seen_unreachable
= 0;
7076 /* Walk the case label list, making sure that all case labels
7078 for (cp
= body
->ext
.case_list
; cp
; cp
= cp
->next
)
7080 /* Count the number of cases in the whole construct. */
7083 /* Intercept the DEFAULT case. */
7084 if (cp
->low
== NULL
&& cp
->high
== NULL
)
7086 if (default_case
!= NULL
)
7088 gfc_error ("The DEFAULT CASE at %L cannot be followed "
7089 "by a second DEFAULT CASE at %L",
7090 &default_case
->where
, &cp
->where
);
7101 /* Deal with single value cases and case ranges. Errors are
7102 issued from the validation function. */
7103 if (validate_case_label_expr (cp
->low
, case_expr
) != SUCCESS
7104 || validate_case_label_expr (cp
->high
, case_expr
) != SUCCESS
)
7110 if (type
== BT_LOGICAL
7111 && ((cp
->low
== NULL
|| cp
->high
== NULL
)
7112 || cp
->low
!= cp
->high
))
7114 gfc_error ("Logical range in CASE statement at %L is not "
7115 "allowed", &cp
->low
->where
);
7120 if (type
== BT_LOGICAL
&& cp
->low
->expr_type
== EXPR_CONSTANT
)
7123 value
= cp
->low
->value
.logical
== 0 ? 2 : 1;
7124 if (value
& seen_logical
)
7126 gfc_error ("Constant logical value in CASE statement "
7127 "is repeated at %L",
7132 seen_logical
|= value
;
7135 if (cp
->low
!= NULL
&& cp
->high
!= NULL
7136 && cp
->low
!= cp
->high
7137 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
7139 if (gfc_option
.warn_surprising
)
7140 gfc_warning ("Range specification at %L can never "
7141 "be matched", &cp
->where
);
7143 cp
->unreachable
= 1;
7144 seen_unreachable
= 1;
7148 /* If the case range can be matched, it can also overlap with
7149 other cases. To make sure it does not, we put it in a
7150 double linked list here. We sort that with a merge sort
7151 later on to detect any overlapping cases. */
7155 head
->right
= head
->left
= NULL
;
7160 tail
->right
->left
= tail
;
7167 /* It there was a failure in the previous case label, give up
7168 for this case label list. Continue with the next block. */
7172 /* See if any case labels that are unreachable have been seen.
7173 If so, we eliminate them. This is a bit of a kludge because
7174 the case lists for a single case statement (label) is a
7175 single forward linked lists. */
7176 if (seen_unreachable
)
7178 /* Advance until the first case in the list is reachable. */
7179 while (body
->ext
.case_list
!= NULL
7180 && body
->ext
.case_list
->unreachable
)
7182 gfc_case
*n
= body
->ext
.case_list
;
7183 body
->ext
.case_list
= body
->ext
.case_list
->next
;
7185 gfc_free_case_list (n
);
7188 /* Strip all other unreachable cases. */
7189 if (body
->ext
.case_list
)
7191 for (cp
= body
->ext
.case_list
; cp
->next
; cp
= cp
->next
)
7193 if (cp
->next
->unreachable
)
7195 gfc_case
*n
= cp
->next
;
7196 cp
->next
= cp
->next
->next
;
7198 gfc_free_case_list (n
);
7205 /* See if there were overlapping cases. If the check returns NULL,
7206 there was overlap. In that case we don't do anything. If head
7207 is non-NULL, we prepend the DEFAULT case. The sorted list can
7208 then used during code generation for SELECT CASE constructs with
7209 a case expression of a CHARACTER type. */
7212 head
= check_case_overlap (head
);
7214 /* Prepend the default_case if it is there. */
7215 if (head
!= NULL
&& default_case
)
7217 default_case
->left
= NULL
;
7218 default_case
->right
= head
;
7219 head
->left
= default_case
;
7223 /* Eliminate dead blocks that may be the result if we've seen
7224 unreachable case labels for a block. */
7225 for (body
= code
; body
&& body
->block
; body
= body
->block
)
7227 if (body
->block
->ext
.case_list
== NULL
)
7229 /* Cut the unreachable block from the code chain. */
7230 gfc_code
*c
= body
->block
;
7231 body
->block
= c
->block
;
7233 /* Kill the dead block, but not the blocks below it. */
7235 gfc_free_statements (c
);
7239 /* More than two cases is legal but insane for logical selects.
7240 Issue a warning for it. */
7241 if (gfc_option
.warn_surprising
&& type
== BT_LOGICAL
7243 gfc_warning ("Logical SELECT CASE block at %L has more that two cases",
7248 /* Check if a derived type is extensible. */
7251 gfc_type_is_extensible (gfc_symbol
*sym
)
7253 return !(sym
->attr
.is_bind_c
|| sym
->attr
.sequence
);
7257 /* Resolve a SELECT TYPE statement. */
7260 resolve_select_type (gfc_code
*code
)
7262 gfc_symbol
*selector_type
;
7263 gfc_code
*body
, *new_st
, *if_st
, *tail
;
7264 gfc_code
*class_is
= NULL
, *default_case
= NULL
;
7267 char name
[GFC_MAX_SYMBOL_LEN
];
7271 ns
= code
->ext
.block
.ns
;
7274 /* Check for F03:C813. */
7275 if (code
->expr1
->ts
.type
!= BT_CLASS
7276 && !(code
->expr2
&& code
->expr2
->ts
.type
== BT_CLASS
))
7278 gfc_error ("Selector shall be polymorphic in SELECT TYPE statement "
7279 "at %L", &code
->loc
);
7285 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
7286 code
->expr1
->symtree
->n
.sym
->ts
= code
->expr2
->ts
;
7287 selector_type
= CLASS_DATA (code
->expr2
)->ts
.u
.derived
;
7290 selector_type
= CLASS_DATA (code
->expr1
)->ts
.u
.derived
;
7292 /* Loop over TYPE IS / CLASS IS cases. */
7293 for (body
= code
->block
; body
; body
= body
->block
)
7295 c
= body
->ext
.case_list
;
7297 /* Check F03:C815. */
7298 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
7299 && !gfc_type_is_extensible (c
->ts
.u
.derived
))
7301 gfc_error ("Derived type '%s' at %L must be extensible",
7302 c
->ts
.u
.derived
->name
, &c
->where
);
7307 /* Check F03:C816. */
7308 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
7309 && !gfc_type_is_extension_of (selector_type
, c
->ts
.u
.derived
))
7311 gfc_error ("Derived type '%s' at %L must be an extension of '%s'",
7312 c
->ts
.u
.derived
->name
, &c
->where
, selector_type
->name
);
7317 /* Intercept the DEFAULT case. */
7318 if (c
->ts
.type
== BT_UNKNOWN
)
7320 /* Check F03:C818. */
7323 gfc_error ("The DEFAULT CASE at %L cannot be followed "
7324 "by a second DEFAULT CASE at %L",
7325 &default_case
->ext
.case_list
->where
, &c
->where
);
7330 default_case
= body
;
7339 /* Insert assignment for selector variable. */
7340 new_st
= gfc_get_code ();
7341 new_st
->op
= EXEC_ASSIGN
;
7342 new_st
->expr1
= gfc_copy_expr (code
->expr1
);
7343 new_st
->expr2
= gfc_copy_expr (code
->expr2
);
7347 /* Put SELECT TYPE statement inside a BLOCK. */
7348 new_st
= gfc_get_code ();
7349 new_st
->op
= code
->op
;
7350 new_st
->expr1
= code
->expr1
;
7351 new_st
->expr2
= code
->expr2
;
7352 new_st
->block
= code
->block
;
7356 ns
->code
->next
= new_st
;
7357 code
->op
= EXEC_BLOCK
;
7358 code
->ext
.block
.assoc
= NULL
;
7359 code
->expr1
= code
->expr2
= NULL
;
7364 /* Transform to EXEC_SELECT. */
7365 code
->op
= EXEC_SELECT
;
7366 gfc_add_component_ref (code
->expr1
, "$vptr");
7367 gfc_add_component_ref (code
->expr1
, "$hash");
7369 /* Loop over TYPE IS / CLASS IS cases. */
7370 for (body
= code
->block
; body
; body
= body
->block
)
7372 c
= body
->ext
.case_list
;
7374 if (c
->ts
.type
== BT_DERIVED
)
7375 c
->low
= c
->high
= gfc_get_int_expr (gfc_default_integer_kind
, NULL
,
7376 c
->ts
.u
.derived
->hash_value
);
7378 else if (c
->ts
.type
== BT_UNKNOWN
)
7381 /* Assign temporary to selector. */
7382 if (c
->ts
.type
== BT_CLASS
)
7383 sprintf (name
, "tmp$class$%s", c
->ts
.u
.derived
->name
);
7385 sprintf (name
, "tmp$type$%s", c
->ts
.u
.derived
->name
);
7386 st
= gfc_find_symtree (ns
->sym_root
, name
);
7387 new_st
= gfc_get_code ();
7388 new_st
->expr1
= gfc_get_variable_expr (st
);
7389 new_st
->expr2
= gfc_get_variable_expr (code
->expr1
->symtree
);
7390 if (c
->ts
.type
== BT_DERIVED
)
7392 new_st
->op
= EXEC_POINTER_ASSIGN
;
7393 gfc_add_component_ref (new_st
->expr2
, "$data");
7396 new_st
->op
= EXEC_POINTER_ASSIGN
;
7397 new_st
->next
= body
->next
;
7398 body
->next
= new_st
;
7401 /* Take out CLASS IS cases for separate treatment. */
7403 while (body
&& body
->block
)
7405 if (body
->block
->ext
.case_list
->ts
.type
== BT_CLASS
)
7407 /* Add to class_is list. */
7408 if (class_is
== NULL
)
7410 class_is
= body
->block
;
7415 for (tail
= class_is
; tail
->block
; tail
= tail
->block
) ;
7416 tail
->block
= body
->block
;
7419 /* Remove from EXEC_SELECT list. */
7420 body
->block
= body
->block
->block
;
7433 /* Add a default case to hold the CLASS IS cases. */
7434 for (tail
= code
; tail
->block
; tail
= tail
->block
) ;
7435 tail
->block
= gfc_get_code ();
7437 tail
->op
= EXEC_SELECT_TYPE
;
7438 tail
->ext
.case_list
= gfc_get_case ();
7439 tail
->ext
.case_list
->ts
.type
= BT_UNKNOWN
;
7441 default_case
= tail
;
7444 /* More than one CLASS IS block? */
7445 if (class_is
->block
)
7449 /* Sort CLASS IS blocks by extension level. */
7453 for (c1
= &class_is
; (*c1
) && (*c1
)->block
; c1
= &((*c1
)->block
))
7456 /* F03:C817 (check for doubles). */
7457 if ((*c1
)->ext
.case_list
->ts
.u
.derived
->hash_value
7458 == c2
->ext
.case_list
->ts
.u
.derived
->hash_value
)
7460 gfc_error ("Double CLASS IS block in SELECT TYPE "
7461 "statement at %L", &c2
->ext
.case_list
->where
);
7464 if ((*c1
)->ext
.case_list
->ts
.u
.derived
->attr
.extension
7465 < c2
->ext
.case_list
->ts
.u
.derived
->attr
.extension
)
7468 (*c1
)->block
= c2
->block
;
7478 /* Generate IF chain. */
7479 if_st
= gfc_get_code ();
7480 if_st
->op
= EXEC_IF
;
7482 for (body
= class_is
; body
; body
= body
->block
)
7484 new_st
->block
= gfc_get_code ();
7485 new_st
= new_st
->block
;
7486 new_st
->op
= EXEC_IF
;
7487 /* Set up IF condition: Call _gfortran_is_extension_of. */
7488 new_st
->expr1
= gfc_get_expr ();
7489 new_st
->expr1
->expr_type
= EXPR_FUNCTION
;
7490 new_st
->expr1
->ts
.type
= BT_LOGICAL
;
7491 new_st
->expr1
->ts
.kind
= 4;
7492 new_st
->expr1
->value
.function
.name
= gfc_get_string (PREFIX ("is_extension_of"));
7493 new_st
->expr1
->value
.function
.isym
= XCNEW (gfc_intrinsic_sym
);
7494 new_st
->expr1
->value
.function
.isym
->id
= GFC_ISYM_EXTENDS_TYPE_OF
;
7495 /* Set up arguments. */
7496 new_st
->expr1
->value
.function
.actual
= gfc_get_actual_arglist ();
7497 new_st
->expr1
->value
.function
.actual
->expr
= gfc_get_variable_expr (code
->expr1
->symtree
);
7498 gfc_add_component_ref (new_st
->expr1
->value
.function
.actual
->expr
, "$vptr");
7499 vtab
= gfc_find_derived_vtab (body
->ext
.case_list
->ts
.u
.derived
, true);
7500 st
= gfc_find_symtree (vtab
->ns
->sym_root
, vtab
->name
);
7501 new_st
->expr1
->value
.function
.actual
->next
= gfc_get_actual_arglist ();
7502 new_st
->expr1
->value
.function
.actual
->next
->expr
= gfc_get_variable_expr (st
);
7503 new_st
->next
= body
->next
;
7505 if (default_case
->next
)
7507 new_st
->block
= gfc_get_code ();
7508 new_st
= new_st
->block
;
7509 new_st
->op
= EXEC_IF
;
7510 new_st
->next
= default_case
->next
;
7513 /* Replace CLASS DEFAULT code by the IF chain. */
7514 default_case
->next
= if_st
;
7517 resolve_select (code
);
7522 /* Resolve a transfer statement. This is making sure that:
7523 -- a derived type being transferred has only non-pointer components
7524 -- a derived type being transferred doesn't have private components, unless
7525 it's being transferred from the module where the type was defined
7526 -- we're not trying to transfer a whole assumed size array. */
7529 resolve_transfer (gfc_code
*code
)
7538 if (exp
->expr_type
!= EXPR_VARIABLE
&& exp
->expr_type
!= EXPR_FUNCTION
)
7541 sym
= exp
->symtree
->n
.sym
;
7544 /* Go to actual component transferred. */
7545 for (ref
= code
->expr1
->ref
; ref
; ref
= ref
->next
)
7546 if (ref
->type
== REF_COMPONENT
)
7547 ts
= &ref
->u
.c
.component
->ts
;
7549 if (ts
->type
== BT_DERIVED
)
7551 /* Check that transferred derived type doesn't contain POINTER
7553 if (ts
->u
.derived
->attr
.pointer_comp
)
7555 gfc_error ("Data transfer element at %L cannot have "
7556 "POINTER components", &code
->loc
);
7560 if (ts
->u
.derived
->attr
.alloc_comp
)
7562 gfc_error ("Data transfer element at %L cannot have "
7563 "ALLOCATABLE components", &code
->loc
);
7567 if (derived_inaccessible (ts
->u
.derived
))
7569 gfc_error ("Data transfer element at %L cannot have "
7570 "PRIVATE components",&code
->loc
);
7575 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SIZE
7576 && exp
->ref
->type
== REF_ARRAY
&& exp
->ref
->u
.ar
.type
== AR_FULL
)
7578 gfc_error ("Data transfer element at %L cannot be a full reference to "
7579 "an assumed-size array", &code
->loc
);
7585 /*********** Toplevel code resolution subroutines ***********/
7587 /* Find the set of labels that are reachable from this block. We also
7588 record the last statement in each block. */
7591 find_reachable_labels (gfc_code
*block
)
7598 cs_base
->reachable_labels
= bitmap_obstack_alloc (&labels_obstack
);
7600 /* Collect labels in this block. We don't keep those corresponding
7601 to END {IF|SELECT}, these are checked in resolve_branch by going
7602 up through the code_stack. */
7603 for (c
= block
; c
; c
= c
->next
)
7605 if (c
->here
&& c
->op
!= EXEC_END_BLOCK
)
7606 bitmap_set_bit (cs_base
->reachable_labels
, c
->here
->value
);
7609 /* Merge with labels from parent block. */
7612 gcc_assert (cs_base
->prev
->reachable_labels
);
7613 bitmap_ior_into (cs_base
->reachable_labels
,
7614 cs_base
->prev
->reachable_labels
);
7620 resolve_sync (gfc_code
*code
)
7622 /* Check imageset. The * case matches expr1 == NULL. */
7625 if (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
> 1)
7626 gfc_error ("Imageset argument at %L must be a scalar or rank-1 "
7627 "INTEGER expression", &code
->expr1
->where
);
7628 if (code
->expr1
->expr_type
== EXPR_CONSTANT
&& code
->expr1
->rank
== 0
7629 && mpz_cmp_si (code
->expr1
->value
.integer
, 1) < 0)
7630 gfc_error ("Imageset argument at %L must between 1 and num_images()",
7631 &code
->expr1
->where
);
7632 else if (code
->expr1
->expr_type
== EXPR_ARRAY
7633 && gfc_simplify_expr (code
->expr1
, 0) == SUCCESS
)
7635 gfc_constructor
*cons
;
7636 cons
= gfc_constructor_first (code
->expr1
->value
.constructor
);
7637 for (; cons
; cons
= gfc_constructor_next (cons
))
7638 if (cons
->expr
->expr_type
== EXPR_CONSTANT
7639 && mpz_cmp_si (cons
->expr
->value
.integer
, 1) < 0)
7640 gfc_error ("Imageset argument at %L must between 1 and "
7641 "num_images()", &cons
->expr
->where
);
7647 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
7648 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
7649 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
7650 &code
->expr2
->where
);
7654 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
7655 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
7656 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
7657 &code
->expr3
->where
);
7661 /* Given a branch to a label, see if the branch is conforming.
7662 The code node describes where the branch is located. */
7665 resolve_branch (gfc_st_label
*label
, gfc_code
*code
)
7672 /* Step one: is this a valid branching target? */
7674 if (label
->defined
== ST_LABEL_UNKNOWN
)
7676 gfc_error ("Label %d referenced at %L is never defined", label
->value
,
7681 if (label
->defined
!= ST_LABEL_TARGET
)
7683 gfc_error ("Statement at %L is not a valid branch target statement "
7684 "for the branch statement at %L", &label
->where
, &code
->loc
);
7688 /* Step two: make sure this branch is not a branch to itself ;-) */
7690 if (code
->here
== label
)
7692 gfc_warning ("Branch at %L may result in an infinite loop", &code
->loc
);
7696 /* Step three: See if the label is in the same block as the
7697 branching statement. The hard work has been done by setting up
7698 the bitmap reachable_labels. */
7700 if (bitmap_bit_p (cs_base
->reachable_labels
, label
->value
))
7702 /* Check now whether there is a CRITICAL construct; if so, check
7703 whether the label is still visible outside of the CRITICAL block,
7704 which is invalid. */
7705 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
7706 if (stack
->current
->op
== EXEC_CRITICAL
7707 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
7708 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
7709 " at %L", &code
->loc
, &label
->where
);
7714 /* Step four: If we haven't found the label in the bitmap, it may
7715 still be the label of the END of the enclosing block, in which
7716 case we find it by going up the code_stack. */
7718 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
7720 if (stack
->current
->next
&& stack
->current
->next
->here
== label
)
7722 if (stack
->current
->op
== EXEC_CRITICAL
)
7724 /* Note: A label at END CRITICAL does not leave the CRITICAL
7725 construct as END CRITICAL is still part of it. */
7726 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
7727 " at %L", &code
->loc
, &label
->where
);
7734 gcc_assert (stack
->current
->next
->op
== EXEC_END_BLOCK
);
7738 /* The label is not in an enclosing block, so illegal. This was
7739 allowed in Fortran 66, so we allow it as extension. No
7740 further checks are necessary in this case. */
7741 gfc_notify_std (GFC_STD_LEGACY
, "Label at %L is not in the same block "
7742 "as the GOTO statement at %L", &label
->where
,
7748 /* Check whether EXPR1 has the same shape as EXPR2. */
7751 resolve_where_shape (gfc_expr
*expr1
, gfc_expr
*expr2
)
7753 mpz_t shape
[GFC_MAX_DIMENSIONS
];
7754 mpz_t shape2
[GFC_MAX_DIMENSIONS
];
7755 gfc_try result
= FAILURE
;
7758 /* Compare the rank. */
7759 if (expr1
->rank
!= expr2
->rank
)
7762 /* Compare the size of each dimension. */
7763 for (i
=0; i
<expr1
->rank
; i
++)
7765 if (gfc_array_dimen_size (expr1
, i
, &shape
[i
]) == FAILURE
)
7768 if (gfc_array_dimen_size (expr2
, i
, &shape2
[i
]) == FAILURE
)
7771 if (mpz_cmp (shape
[i
], shape2
[i
]))
7775 /* When either of the two expression is an assumed size array, we
7776 ignore the comparison of dimension sizes. */
7781 for (i
--; i
>= 0; i
--)
7783 mpz_clear (shape
[i
]);
7784 mpz_clear (shape2
[i
]);
7790 /* Check whether a WHERE assignment target or a WHERE mask expression
7791 has the same shape as the outmost WHERE mask expression. */
7794 resolve_where (gfc_code
*code
, gfc_expr
*mask
)
7800 cblock
= code
->block
;
7802 /* Store the first WHERE mask-expr of the WHERE statement or construct.
7803 In case of nested WHERE, only the outmost one is stored. */
7804 if (mask
== NULL
) /* outmost WHERE */
7806 else /* inner WHERE */
7813 /* Check if the mask-expr has a consistent shape with the
7814 outmost WHERE mask-expr. */
7815 if (resolve_where_shape (cblock
->expr1
, e
) == FAILURE
)
7816 gfc_error ("WHERE mask at %L has inconsistent shape",
7817 &cblock
->expr1
->where
);
7820 /* the assignment statement of a WHERE statement, or the first
7821 statement in where-body-construct of a WHERE construct */
7822 cnext
= cblock
->next
;
7827 /* WHERE assignment statement */
7830 /* Check shape consistent for WHERE assignment target. */
7831 if (e
&& resolve_where_shape (cnext
->expr1
, e
) == FAILURE
)
7832 gfc_error ("WHERE assignment target at %L has "
7833 "inconsistent shape", &cnext
->expr1
->where
);
7837 case EXEC_ASSIGN_CALL
:
7838 resolve_call (cnext
);
7839 if (!cnext
->resolved_sym
->attr
.elemental
)
7840 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
7841 &cnext
->ext
.actual
->expr
->where
);
7844 /* WHERE or WHERE construct is part of a where-body-construct */
7846 resolve_where (cnext
, e
);
7850 gfc_error ("Unsupported statement inside WHERE at %L",
7853 /* the next statement within the same where-body-construct */
7854 cnext
= cnext
->next
;
7856 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
7857 cblock
= cblock
->block
;
7862 /* Resolve assignment in FORALL construct.
7863 NVAR is the number of FORALL index variables, and VAR_EXPR records the
7864 FORALL index variables. */
7867 gfc_resolve_assign_in_forall (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
7871 for (n
= 0; n
< nvar
; n
++)
7873 gfc_symbol
*forall_index
;
7875 forall_index
= var_expr
[n
]->symtree
->n
.sym
;
7877 /* Check whether the assignment target is one of the FORALL index
7879 if ((code
->expr1
->expr_type
== EXPR_VARIABLE
)
7880 && (code
->expr1
->symtree
->n
.sym
== forall_index
))
7881 gfc_error ("Assignment to a FORALL index variable at %L",
7882 &code
->expr1
->where
);
7885 /* If one of the FORALL index variables doesn't appear in the
7886 assignment variable, then there could be a many-to-one
7887 assignment. Emit a warning rather than an error because the
7888 mask could be resolving this problem. */
7889 if (find_forall_index (code
->expr1
, forall_index
, 0) == FAILURE
)
7890 gfc_warning ("The FORALL with index '%s' is not used on the "
7891 "left side of the assignment at %L and so might "
7892 "cause multiple assignment to this object",
7893 var_expr
[n
]->symtree
->name
, &code
->expr1
->where
);
7899 /* Resolve WHERE statement in FORALL construct. */
7902 gfc_resolve_where_code_in_forall (gfc_code
*code
, int nvar
,
7903 gfc_expr
**var_expr
)
7908 cblock
= code
->block
;
7911 /* the assignment statement of a WHERE statement, or the first
7912 statement in where-body-construct of a WHERE construct */
7913 cnext
= cblock
->next
;
7918 /* WHERE assignment statement */
7920 gfc_resolve_assign_in_forall (cnext
, nvar
, var_expr
);
7923 /* WHERE operator assignment statement */
7924 case EXEC_ASSIGN_CALL
:
7925 resolve_call (cnext
);
7926 if (!cnext
->resolved_sym
->attr
.elemental
)
7927 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
7928 &cnext
->ext
.actual
->expr
->where
);
7931 /* WHERE or WHERE construct is part of a where-body-construct */
7933 gfc_resolve_where_code_in_forall (cnext
, nvar
, var_expr
);
7937 gfc_error ("Unsupported statement inside WHERE at %L",
7940 /* the next statement within the same where-body-construct */
7941 cnext
= cnext
->next
;
7943 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
7944 cblock
= cblock
->block
;
7949 /* Traverse the FORALL body to check whether the following errors exist:
7950 1. For assignment, check if a many-to-one assignment happens.
7951 2. For WHERE statement, check the WHERE body to see if there is any
7952 many-to-one assignment. */
7955 gfc_resolve_forall_body (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
7959 c
= code
->block
->next
;
7965 case EXEC_POINTER_ASSIGN
:
7966 gfc_resolve_assign_in_forall (c
, nvar
, var_expr
);
7969 case EXEC_ASSIGN_CALL
:
7973 /* Because the gfc_resolve_blocks() will handle the nested FORALL,
7974 there is no need to handle it here. */
7978 gfc_resolve_where_code_in_forall(c
, nvar
, var_expr
);
7983 /* The next statement in the FORALL body. */
7989 /* Counts the number of iterators needed inside a forall construct, including
7990 nested forall constructs. This is used to allocate the needed memory
7991 in gfc_resolve_forall. */
7994 gfc_count_forall_iterators (gfc_code
*code
)
7996 int max_iters
, sub_iters
, current_iters
;
7997 gfc_forall_iterator
*fa
;
7999 gcc_assert(code
->op
== EXEC_FORALL
);
8003 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
8006 code
= code
->block
->next
;
8010 if (code
->op
== EXEC_FORALL
)
8012 sub_iters
= gfc_count_forall_iterators (code
);
8013 if (sub_iters
> max_iters
)
8014 max_iters
= sub_iters
;
8019 return current_iters
+ max_iters
;
8023 /* Given a FORALL construct, first resolve the FORALL iterator, then call
8024 gfc_resolve_forall_body to resolve the FORALL body. */
8027 gfc_resolve_forall (gfc_code
*code
, gfc_namespace
*ns
, int forall_save
)
8029 static gfc_expr
**var_expr
;
8030 static int total_var
= 0;
8031 static int nvar
= 0;
8033 gfc_forall_iterator
*fa
;
8038 /* Start to resolve a FORALL construct */
8039 if (forall_save
== 0)
8041 /* Count the total number of FORALL index in the nested FORALL
8042 construct in order to allocate the VAR_EXPR with proper size. */
8043 total_var
= gfc_count_forall_iterators (code
);
8045 /* Allocate VAR_EXPR with NUMBER_OF_FORALL_INDEX elements. */
8046 var_expr
= (gfc_expr
**) gfc_getmem (total_var
* sizeof (gfc_expr
*));
8049 /* The information about FORALL iterator, including FORALL index start, end
8050 and stride. The FORALL index can not appear in start, end or stride. */
8051 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
8053 /* Check if any outer FORALL index name is the same as the current
8055 for (i
= 0; i
< nvar
; i
++)
8057 if (fa
->var
->symtree
->n
.sym
== var_expr
[i
]->symtree
->n
.sym
)
8059 gfc_error ("An outer FORALL construct already has an index "
8060 "with this name %L", &fa
->var
->where
);
8064 /* Record the current FORALL index. */
8065 var_expr
[nvar
] = gfc_copy_expr (fa
->var
);
8069 /* No memory leak. */
8070 gcc_assert (nvar
<= total_var
);
8073 /* Resolve the FORALL body. */
8074 gfc_resolve_forall_body (code
, nvar
, var_expr
);
8076 /* May call gfc_resolve_forall to resolve the inner FORALL loop. */
8077 gfc_resolve_blocks (code
->block
, ns
);
8081 /* Free only the VAR_EXPRs allocated in this frame. */
8082 for (i
= nvar
; i
< tmp
; i
++)
8083 gfc_free_expr (var_expr
[i
]);
8087 /* We are in the outermost FORALL construct. */
8088 gcc_assert (forall_save
== 0);
8090 /* VAR_EXPR is not needed any more. */
8091 gfc_free (var_expr
);
8097 /* Resolve a BLOCK construct statement. */
8100 resolve_block_construct (gfc_code
* code
)
8102 /* For an ASSOCIATE block, the associations (and their targets) are already
8103 resolved during gfc_resolve_symbol. */
8105 /* Resolve the BLOCK's namespace. */
8106 gfc_resolve (code
->ext
.block
.ns
);
8110 /* Resolve lists of blocks found in IF, SELECT CASE, WHERE, FORALL, GOTO and
8113 static void resolve_code (gfc_code
*, gfc_namespace
*);
8116 gfc_resolve_blocks (gfc_code
*b
, gfc_namespace
*ns
)
8120 for (; b
; b
= b
->block
)
8122 t
= gfc_resolve_expr (b
->expr1
);
8123 if (gfc_resolve_expr (b
->expr2
) == FAILURE
)
8129 if (t
== SUCCESS
&& b
->expr1
!= NULL
8130 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
!= 0))
8131 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
8138 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
== 0))
8139 gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
8144 resolve_branch (b
->label1
, b
);
8148 resolve_block_construct (b
);
8152 case EXEC_SELECT_TYPE
:
8163 case EXEC_OMP_ATOMIC
:
8164 case EXEC_OMP_CRITICAL
:
8166 case EXEC_OMP_MASTER
:
8167 case EXEC_OMP_ORDERED
:
8168 case EXEC_OMP_PARALLEL
:
8169 case EXEC_OMP_PARALLEL_DO
:
8170 case EXEC_OMP_PARALLEL_SECTIONS
:
8171 case EXEC_OMP_PARALLEL_WORKSHARE
:
8172 case EXEC_OMP_SECTIONS
:
8173 case EXEC_OMP_SINGLE
:
8175 case EXEC_OMP_TASKWAIT
:
8176 case EXEC_OMP_WORKSHARE
:
8180 gfc_internal_error ("gfc_resolve_blocks(): Bad block type");
8183 resolve_code (b
->next
, ns
);
8188 /* Does everything to resolve an ordinary assignment. Returns true
8189 if this is an interface assignment. */
8191 resolve_ordinary_assign (gfc_code
*code
, gfc_namespace
*ns
)
8201 if (gfc_extend_assign (code
, ns
) == SUCCESS
)
8205 if (code
->op
== EXEC_ASSIGN_CALL
)
8207 lhs
= code
->ext
.actual
->expr
;
8208 rhsptr
= &code
->ext
.actual
->next
->expr
;
8212 gfc_actual_arglist
* args
;
8213 gfc_typebound_proc
* tbp
;
8215 gcc_assert (code
->op
== EXEC_COMPCALL
);
8217 args
= code
->expr1
->value
.compcall
.actual
;
8219 rhsptr
= &args
->next
->expr
;
8221 tbp
= code
->expr1
->value
.compcall
.tbp
;
8222 gcc_assert (!tbp
->is_generic
);
8225 /* Make a temporary rhs when there is a default initializer
8226 and rhs is the same symbol as the lhs. */
8227 if ((*rhsptr
)->expr_type
== EXPR_VARIABLE
8228 && (*rhsptr
)->symtree
->n
.sym
->ts
.type
== BT_DERIVED
8229 && gfc_has_default_initializer ((*rhsptr
)->symtree
->n
.sym
->ts
.u
.derived
)
8230 && (lhs
->symtree
->n
.sym
== (*rhsptr
)->symtree
->n
.sym
))
8231 *rhsptr
= gfc_get_parentheses (*rhsptr
);
8240 && gfc_notify_std (GFC_STD_GNU
, "Extension: BOZ literal at %L outside "
8241 "a DATA statement and outside INT/REAL/DBLE/CMPLX",
8242 &code
->loc
) == FAILURE
)
8245 /* Handle the case of a BOZ literal on the RHS. */
8246 if (rhs
->is_boz
&& lhs
->ts
.type
!= BT_INTEGER
)
8249 if (gfc_option
.warn_surprising
)
8250 gfc_warning ("BOZ literal at %L is bitwise transferred "
8251 "non-integer symbol '%s'", &code
->loc
,
8252 lhs
->symtree
->n
.sym
->name
);
8254 if (!gfc_convert_boz (rhs
, &lhs
->ts
))
8256 if ((rc
= gfc_range_check (rhs
)) != ARITH_OK
)
8258 if (rc
== ARITH_UNDERFLOW
)
8259 gfc_error ("Arithmetic underflow of bit-wise transferred BOZ at %L"
8260 ". This check can be disabled with the option "
8261 "-fno-range-check", &rhs
->where
);
8262 else if (rc
== ARITH_OVERFLOW
)
8263 gfc_error ("Arithmetic overflow of bit-wise transferred BOZ at %L"
8264 ". This check can be disabled with the option "
8265 "-fno-range-check", &rhs
->where
);
8266 else if (rc
== ARITH_NAN
)
8267 gfc_error ("Arithmetic NaN of bit-wise transferred BOZ at %L"
8268 ". This check can be disabled with the option "
8269 "-fno-range-check", &rhs
->where
);
8275 if (lhs
->ts
.type
== BT_CHARACTER
8276 && gfc_option
.warn_character_truncation
)
8278 if (lhs
->ts
.u
.cl
!= NULL
8279 && lhs
->ts
.u
.cl
->length
!= NULL
8280 && lhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
8281 llen
= mpz_get_si (lhs
->ts
.u
.cl
->length
->value
.integer
);
8283 if (rhs
->expr_type
== EXPR_CONSTANT
)
8284 rlen
= rhs
->value
.character
.length
;
8286 else if (rhs
->ts
.u
.cl
!= NULL
8287 && rhs
->ts
.u
.cl
->length
!= NULL
8288 && rhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
8289 rlen
= mpz_get_si (rhs
->ts
.u
.cl
->length
->value
.integer
);
8291 if (rlen
&& llen
&& rlen
> llen
)
8292 gfc_warning_now ("CHARACTER expression will be truncated "
8293 "in assignment (%d/%d) at %L",
8294 llen
, rlen
, &code
->loc
);
8297 /* Ensure that a vector index expression for the lvalue is evaluated
8298 to a temporary if the lvalue symbol is referenced in it. */
8301 for (ref
= lhs
->ref
; ref
; ref
= ref
->next
)
8302 if (ref
->type
== REF_ARRAY
)
8304 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
8305 if (ref
->u
.ar
.dimen_type
[n
] == DIMEN_VECTOR
8306 && gfc_find_sym_in_expr (lhs
->symtree
->n
.sym
,
8307 ref
->u
.ar
.start
[n
]))
8309 = gfc_get_parentheses (ref
->u
.ar
.start
[n
]);
8313 if (gfc_pure (NULL
))
8315 if (gfc_impure_variable (lhs
->symtree
->n
.sym
))
8317 gfc_error ("Cannot assign to variable '%s' in PURE "
8319 lhs
->symtree
->n
.sym
->name
,
8324 if (lhs
->ts
.type
== BT_DERIVED
8325 && lhs
->expr_type
== EXPR_VARIABLE
8326 && lhs
->ts
.u
.derived
->attr
.pointer_comp
8327 && rhs
->expr_type
== EXPR_VARIABLE
8328 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
8329 || gfc_is_coindexed (rhs
)))
8332 if (gfc_is_coindexed (rhs
))
8333 gfc_error ("Coindexed expression at %L is assigned to "
8334 "a derived type variable with a POINTER "
8335 "component in a PURE procedure",
8338 gfc_error ("The impure variable at %L is assigned to "
8339 "a derived type variable with a POINTER "
8340 "component in a PURE procedure (12.6)",
8345 /* Fortran 2008, C1283. */
8346 if (gfc_is_coindexed (lhs
))
8348 gfc_error ("Assignment to coindexed variable at %L in a PURE "
8349 "procedure", &rhs
->where
);
8355 /* FIXME: Valid in Fortran 2008, unless the LHS is both polymorphic
8356 and coindexed; cf. F2008, 7.2.1.2 and PR 43366. */
8357 if (lhs
->ts
.type
== BT_CLASS
)
8359 gfc_error ("Variable must not be polymorphic in assignment at %L",
8364 /* F2008, Section 7.2.1.2. */
8365 if (gfc_is_coindexed (lhs
) && gfc_has_ultimate_allocatable (lhs
))
8367 gfc_error ("Coindexed variable must not be have an allocatable ultimate "
8368 "component in assignment at %L", &lhs
->where
);
8372 gfc_check_assign (lhs
, rhs
, 1);
8377 /* Given a block of code, recursively resolve everything pointed to by this
8381 resolve_code (gfc_code
*code
, gfc_namespace
*ns
)
8383 int omp_workshare_save
;
8388 frame
.prev
= cs_base
;
8392 find_reachable_labels (code
);
8394 for (; code
; code
= code
->next
)
8396 frame
.current
= code
;
8397 forall_save
= forall_flag
;
8399 if (code
->op
== EXEC_FORALL
)
8402 gfc_resolve_forall (code
, ns
, forall_save
);
8405 else if (code
->block
)
8407 omp_workshare_save
= -1;
8410 case EXEC_OMP_PARALLEL_WORKSHARE
:
8411 omp_workshare_save
= omp_workshare_flag
;
8412 omp_workshare_flag
= 1;
8413 gfc_resolve_omp_parallel_blocks (code
, ns
);
8415 case EXEC_OMP_PARALLEL
:
8416 case EXEC_OMP_PARALLEL_DO
:
8417 case EXEC_OMP_PARALLEL_SECTIONS
:
8419 omp_workshare_save
= omp_workshare_flag
;
8420 omp_workshare_flag
= 0;
8421 gfc_resolve_omp_parallel_blocks (code
, ns
);
8424 gfc_resolve_omp_do_blocks (code
, ns
);
8426 case EXEC_SELECT_TYPE
:
8427 gfc_current_ns
= code
->ext
.block
.ns
;
8428 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
8429 gfc_current_ns
= ns
;
8431 case EXEC_OMP_WORKSHARE
:
8432 omp_workshare_save
= omp_workshare_flag
;
8433 omp_workshare_flag
= 1;
8436 gfc_resolve_blocks (code
->block
, ns
);
8440 if (omp_workshare_save
!= -1)
8441 omp_workshare_flag
= omp_workshare_save
;
8445 if (code
->op
!= EXEC_COMPCALL
&& code
->op
!= EXEC_CALL_PPC
)
8446 t
= gfc_resolve_expr (code
->expr1
);
8447 forall_flag
= forall_save
;
8449 if (gfc_resolve_expr (code
->expr2
) == FAILURE
)
8452 if (code
->op
== EXEC_ALLOCATE
8453 && gfc_resolve_expr (code
->expr3
) == FAILURE
)
8459 case EXEC_END_BLOCK
:
8463 case EXEC_ERROR_STOP
:
8467 case EXEC_ASSIGN_CALL
:
8472 case EXEC_SYNC_IMAGES
:
8473 case EXEC_SYNC_MEMORY
:
8474 resolve_sync (code
);
8478 /* Keep track of which entry we are up to. */
8479 current_entry_id
= code
->ext
.entry
->id
;
8483 resolve_where (code
, NULL
);
8487 if (code
->expr1
!= NULL
)
8489 if (code
->expr1
->ts
.type
!= BT_INTEGER
)
8490 gfc_error ("ASSIGNED GOTO statement at %L requires an "
8491 "INTEGER variable", &code
->expr1
->where
);
8492 else if (code
->expr1
->symtree
->n
.sym
->attr
.assign
!= 1)
8493 gfc_error ("Variable '%s' has not been assigned a target "
8494 "label at %L", code
->expr1
->symtree
->n
.sym
->name
,
8495 &code
->expr1
->where
);
8498 resolve_branch (code
->label1
, code
);
8502 if (code
->expr1
!= NULL
8503 && (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
))
8504 gfc_error ("Alternate RETURN statement at %L requires a SCALAR-"
8505 "INTEGER return specifier", &code
->expr1
->where
);
8508 case EXEC_INIT_ASSIGN
:
8509 case EXEC_END_PROCEDURE
:
8516 if (resolve_ordinary_assign (code
, ns
))
8518 if (code
->op
== EXEC_COMPCALL
)
8525 case EXEC_LABEL_ASSIGN
:
8526 if (code
->label1
->defined
== ST_LABEL_UNKNOWN
)
8527 gfc_error ("Label %d referenced at %L is never defined",
8528 code
->label1
->value
, &code
->label1
->where
);
8530 && (code
->expr1
->expr_type
!= EXPR_VARIABLE
8531 || code
->expr1
->symtree
->n
.sym
->ts
.type
!= BT_INTEGER
8532 || code
->expr1
->symtree
->n
.sym
->ts
.kind
8533 != gfc_default_integer_kind
8534 || code
->expr1
->symtree
->n
.sym
->as
!= NULL
))
8535 gfc_error ("ASSIGN statement at %L requires a scalar "
8536 "default INTEGER variable", &code
->expr1
->where
);
8539 case EXEC_POINTER_ASSIGN
:
8543 gfc_check_pointer_assign (code
->expr1
, code
->expr2
);
8546 case EXEC_ARITHMETIC_IF
:
8548 && code
->expr1
->ts
.type
!= BT_INTEGER
8549 && code
->expr1
->ts
.type
!= BT_REAL
)
8550 gfc_error ("Arithmetic IF statement at %L requires a numeric "
8551 "expression", &code
->expr1
->where
);
8553 resolve_branch (code
->label1
, code
);
8554 resolve_branch (code
->label2
, code
);
8555 resolve_branch (code
->label3
, code
);
8559 if (t
== SUCCESS
&& code
->expr1
!= NULL
8560 && (code
->expr1
->ts
.type
!= BT_LOGICAL
8561 || code
->expr1
->rank
!= 0))
8562 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
8563 &code
->expr1
->where
);
8568 resolve_call (code
);
8573 resolve_typebound_subroutine (code
);
8577 resolve_ppc_call (code
);
8581 /* Select is complicated. Also, a SELECT construct could be
8582 a transformed computed GOTO. */
8583 resolve_select (code
);
8586 case EXEC_SELECT_TYPE
:
8587 resolve_select_type (code
);
8591 gfc_resolve (code
->ext
.block
.ns
);
8595 if (code
->ext
.iterator
!= NULL
)
8597 gfc_iterator
*iter
= code
->ext
.iterator
;
8598 if (gfc_resolve_iterator (iter
, true) != FAILURE
)
8599 gfc_resolve_do_iterator (code
, iter
->var
->symtree
->n
.sym
);
8604 if (code
->expr1
== NULL
)
8605 gfc_internal_error ("resolve_code(): No expression on DO WHILE");
8607 && (code
->expr1
->rank
!= 0
8608 || code
->expr1
->ts
.type
!= BT_LOGICAL
))
8609 gfc_error ("Exit condition of DO WHILE loop at %L must be "
8610 "a scalar LOGICAL expression", &code
->expr1
->where
);
8615 resolve_allocate_deallocate (code
, "ALLOCATE");
8619 case EXEC_DEALLOCATE
:
8621 resolve_allocate_deallocate (code
, "DEALLOCATE");
8626 if (gfc_resolve_open (code
->ext
.open
) == FAILURE
)
8629 resolve_branch (code
->ext
.open
->err
, code
);
8633 if (gfc_resolve_close (code
->ext
.close
) == FAILURE
)
8636 resolve_branch (code
->ext
.close
->err
, code
);
8639 case EXEC_BACKSPACE
:
8643 if (gfc_resolve_filepos (code
->ext
.filepos
) == FAILURE
)
8646 resolve_branch (code
->ext
.filepos
->err
, code
);
8650 if (gfc_resolve_inquire (code
->ext
.inquire
) == FAILURE
)
8653 resolve_branch (code
->ext
.inquire
->err
, code
);
8657 gcc_assert (code
->ext
.inquire
!= NULL
);
8658 if (gfc_resolve_inquire (code
->ext
.inquire
) == FAILURE
)
8661 resolve_branch (code
->ext
.inquire
->err
, code
);
8665 if (gfc_resolve_wait (code
->ext
.wait
) == FAILURE
)
8668 resolve_branch (code
->ext
.wait
->err
, code
);
8669 resolve_branch (code
->ext
.wait
->end
, code
);
8670 resolve_branch (code
->ext
.wait
->eor
, code
);
8675 if (gfc_resolve_dt (code
->ext
.dt
, &code
->loc
) == FAILURE
)
8678 resolve_branch (code
->ext
.dt
->err
, code
);
8679 resolve_branch (code
->ext
.dt
->end
, code
);
8680 resolve_branch (code
->ext
.dt
->eor
, code
);
8684 resolve_transfer (code
);
8688 resolve_forall_iterators (code
->ext
.forall_iterator
);
8690 if (code
->expr1
!= NULL
&& code
->expr1
->ts
.type
!= BT_LOGICAL
)
8691 gfc_error ("FORALL mask clause at %L requires a LOGICAL "
8692 "expression", &code
->expr1
->where
);
8695 case EXEC_OMP_ATOMIC
:
8696 case EXEC_OMP_BARRIER
:
8697 case EXEC_OMP_CRITICAL
:
8698 case EXEC_OMP_FLUSH
:
8700 case EXEC_OMP_MASTER
:
8701 case EXEC_OMP_ORDERED
:
8702 case EXEC_OMP_SECTIONS
:
8703 case EXEC_OMP_SINGLE
:
8704 case EXEC_OMP_TASKWAIT
:
8705 case EXEC_OMP_WORKSHARE
:
8706 gfc_resolve_omp_directive (code
, ns
);
8709 case EXEC_OMP_PARALLEL
:
8710 case EXEC_OMP_PARALLEL_DO
:
8711 case EXEC_OMP_PARALLEL_SECTIONS
:
8712 case EXEC_OMP_PARALLEL_WORKSHARE
:
8714 omp_workshare_save
= omp_workshare_flag
;
8715 omp_workshare_flag
= 0;
8716 gfc_resolve_omp_directive (code
, ns
);
8717 omp_workshare_flag
= omp_workshare_save
;
8721 gfc_internal_error ("resolve_code(): Bad statement code");
8725 cs_base
= frame
.prev
;
8729 /* Resolve initial values and make sure they are compatible with
8733 resolve_values (gfc_symbol
*sym
)
8735 if (sym
->value
== NULL
)
8738 if (gfc_resolve_expr (sym
->value
) == FAILURE
)
8741 gfc_check_assign_symbol (sym
, sym
->value
);
8745 /* Verify the binding labels for common blocks that are BIND(C). The label
8746 for a BIND(C) common block must be identical in all scoping units in which
8747 the common block is declared. Further, the binding label can not collide
8748 with any other global entity in the program. */
8751 resolve_bind_c_comms (gfc_symtree
*comm_block_tree
)
8753 if (comm_block_tree
->n
.common
->is_bind_c
== 1)
8755 gfc_gsymbol
*binding_label_gsym
;
8756 gfc_gsymbol
*comm_name_gsym
;
8758 /* See if a global symbol exists by the common block's name. It may
8759 be NULL if the common block is use-associated. */
8760 comm_name_gsym
= gfc_find_gsymbol (gfc_gsym_root
,
8761 comm_block_tree
->n
.common
->name
);
8762 if (comm_name_gsym
!= NULL
&& comm_name_gsym
->type
!= GSYM_COMMON
)
8763 gfc_error ("Binding label '%s' for common block '%s' at %L collides "
8764 "with the global entity '%s' at %L",
8765 comm_block_tree
->n
.common
->binding_label
,
8766 comm_block_tree
->n
.common
->name
,
8767 &(comm_block_tree
->n
.common
->where
),
8768 comm_name_gsym
->name
, &(comm_name_gsym
->where
));
8769 else if (comm_name_gsym
!= NULL
8770 && strcmp (comm_name_gsym
->name
,
8771 comm_block_tree
->n
.common
->name
) == 0)
8773 /* TODO: Need to make sure the fields of gfc_gsymbol are initialized
8775 if (comm_name_gsym
->binding_label
== NULL
)
8776 /* No binding label for common block stored yet; save this one. */
8777 comm_name_gsym
->binding_label
=
8778 comm_block_tree
->n
.common
->binding_label
;
8780 if (strcmp (comm_name_gsym
->binding_label
,
8781 comm_block_tree
->n
.common
->binding_label
) != 0)
8783 /* Common block names match but binding labels do not. */
8784 gfc_error ("Binding label '%s' for common block '%s' at %L "
8785 "does not match the binding label '%s' for common "
8787 comm_block_tree
->n
.common
->binding_label
,
8788 comm_block_tree
->n
.common
->name
,
8789 &(comm_block_tree
->n
.common
->where
),
8790 comm_name_gsym
->binding_label
,
8791 comm_name_gsym
->name
,
8792 &(comm_name_gsym
->where
));
8797 /* There is no binding label (NAME="") so we have nothing further to
8798 check and nothing to add as a global symbol for the label. */
8799 if (comm_block_tree
->n
.common
->binding_label
[0] == '\0' )
8802 binding_label_gsym
=
8803 gfc_find_gsymbol (gfc_gsym_root
,
8804 comm_block_tree
->n
.common
->binding_label
);
8805 if (binding_label_gsym
== NULL
)
8807 /* Need to make a global symbol for the binding label to prevent
8808 it from colliding with another. */
8809 binding_label_gsym
=
8810 gfc_get_gsymbol (comm_block_tree
->n
.common
->binding_label
);
8811 binding_label_gsym
->sym_name
= comm_block_tree
->n
.common
->name
;
8812 binding_label_gsym
->type
= GSYM_COMMON
;
8816 /* If comm_name_gsym is NULL, the name common block is use
8817 associated and the name could be colliding. */
8818 if (binding_label_gsym
->type
!= GSYM_COMMON
)
8819 gfc_error ("Binding label '%s' for common block '%s' at %L "
8820 "collides with the global entity '%s' at %L",
8821 comm_block_tree
->n
.common
->binding_label
,
8822 comm_block_tree
->n
.common
->name
,
8823 &(comm_block_tree
->n
.common
->where
),
8824 binding_label_gsym
->name
,
8825 &(binding_label_gsym
->where
));
8826 else if (comm_name_gsym
!= NULL
8827 && (strcmp (binding_label_gsym
->name
,
8828 comm_name_gsym
->binding_label
) != 0)
8829 && (strcmp (binding_label_gsym
->sym_name
,
8830 comm_name_gsym
->name
) != 0))
8831 gfc_error ("Binding label '%s' for common block '%s' at %L "
8832 "collides with global entity '%s' at %L",
8833 binding_label_gsym
->name
, binding_label_gsym
->sym_name
,
8834 &(comm_block_tree
->n
.common
->where
),
8835 comm_name_gsym
->name
, &(comm_name_gsym
->where
));
8843 /* Verify any BIND(C) derived types in the namespace so we can report errors
8844 for them once, rather than for each variable declared of that type. */
8847 resolve_bind_c_derived_types (gfc_symbol
*derived_sym
)
8849 if (derived_sym
!= NULL
&& derived_sym
->attr
.flavor
== FL_DERIVED
8850 && derived_sym
->attr
.is_bind_c
== 1)
8851 verify_bind_c_derived_type (derived_sym
);
8857 /* Verify that any binding labels used in a given namespace do not collide
8858 with the names or binding labels of any global symbols. */
8861 gfc_verify_binding_labels (gfc_symbol
*sym
)
8865 if (sym
!= NULL
&& sym
->attr
.is_bind_c
&& sym
->attr
.is_iso_c
== 0
8866 && sym
->attr
.flavor
!= FL_DERIVED
&& sym
->binding_label
[0] != '\0')
8868 gfc_gsymbol
*bind_c_sym
;
8870 bind_c_sym
= gfc_find_gsymbol (gfc_gsym_root
, sym
->binding_label
);
8871 if (bind_c_sym
!= NULL
8872 && strcmp (bind_c_sym
->name
, sym
->binding_label
) == 0)
8874 if (sym
->attr
.if_source
== IFSRC_DECL
8875 && (bind_c_sym
->type
!= GSYM_SUBROUTINE
8876 && bind_c_sym
->type
!= GSYM_FUNCTION
)
8877 && ((sym
->attr
.contained
== 1
8878 && strcmp (bind_c_sym
->sym_name
, sym
->name
) != 0)
8879 || (sym
->attr
.use_assoc
== 1
8880 && (strcmp (bind_c_sym
->mod_name
, sym
->module
) != 0))))
8882 /* Make sure global procedures don't collide with anything. */
8883 gfc_error ("Binding label '%s' at %L collides with the global "
8884 "entity '%s' at %L", sym
->binding_label
,
8885 &(sym
->declared_at
), bind_c_sym
->name
,
8886 &(bind_c_sym
->where
));
8889 else if (sym
->attr
.contained
== 0
8890 && (sym
->attr
.if_source
== IFSRC_IFBODY
8891 && sym
->attr
.flavor
== FL_PROCEDURE
)
8892 && (bind_c_sym
->sym_name
!= NULL
8893 && strcmp (bind_c_sym
->sym_name
, sym
->name
) != 0))
8895 /* Make sure procedures in interface bodies don't collide. */
8896 gfc_error ("Binding label '%s' in interface body at %L collides "
8897 "with the global entity '%s' at %L",
8899 &(sym
->declared_at
), bind_c_sym
->name
,
8900 &(bind_c_sym
->where
));
8903 else if (sym
->attr
.contained
== 0
8904 && sym
->attr
.if_source
== IFSRC_UNKNOWN
)
8905 if ((sym
->attr
.use_assoc
&& bind_c_sym
->mod_name
8906 && strcmp (bind_c_sym
->mod_name
, sym
->module
) != 0)
8907 || sym
->attr
.use_assoc
== 0)
8909 gfc_error ("Binding label '%s' at %L collides with global "
8910 "entity '%s' at %L", sym
->binding_label
,
8911 &(sym
->declared_at
), bind_c_sym
->name
,
8912 &(bind_c_sym
->where
));
8917 /* Clear the binding label to prevent checking multiple times. */
8918 sym
->binding_label
[0] = '\0';
8920 else if (bind_c_sym
== NULL
)
8922 bind_c_sym
= gfc_get_gsymbol (sym
->binding_label
);
8923 bind_c_sym
->where
= sym
->declared_at
;
8924 bind_c_sym
->sym_name
= sym
->name
;
8926 if (sym
->attr
.use_assoc
== 1)
8927 bind_c_sym
->mod_name
= sym
->module
;
8929 if (sym
->ns
->proc_name
!= NULL
)
8930 bind_c_sym
->mod_name
= sym
->ns
->proc_name
->name
;
8932 if (sym
->attr
.contained
== 0)
8934 if (sym
->attr
.subroutine
)
8935 bind_c_sym
->type
= GSYM_SUBROUTINE
;
8936 else if (sym
->attr
.function
)
8937 bind_c_sym
->type
= GSYM_FUNCTION
;
8945 /* Resolve an index expression. */
8948 resolve_index_expr (gfc_expr
*e
)
8950 if (gfc_resolve_expr (e
) == FAILURE
)
8953 if (gfc_simplify_expr (e
, 0) == FAILURE
)
8956 if (gfc_specification_expr (e
) == FAILURE
)
8962 /* Resolve a charlen structure. */
8965 resolve_charlen (gfc_charlen
*cl
)
8974 specification_expr
= 1;
8976 if (resolve_index_expr (cl
->length
) == FAILURE
)
8978 specification_expr
= 0;
8982 /* "If the character length parameter value evaluates to a negative
8983 value, the length of character entities declared is zero." */
8984 if (cl
->length
&& !gfc_extract_int (cl
->length
, &i
) && i
< 0)
8986 if (gfc_option
.warn_surprising
)
8987 gfc_warning_now ("CHARACTER variable at %L has negative length %d,"
8988 " the length has been set to zero",
8989 &cl
->length
->where
, i
);
8990 gfc_replace_expr (cl
->length
,
8991 gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 0));
8994 /* Check that the character length is not too large. */
8995 k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
8996 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
8997 && cl
->length
->ts
.type
== BT_INTEGER
8998 && mpz_cmp (cl
->length
->value
.integer
, gfc_integer_kinds
[k
].huge
) > 0)
9000 gfc_error ("String length at %L is too large", &cl
->length
->where
);
9008 /* Test for non-constant shape arrays. */
9011 is_non_constant_shape_array (gfc_symbol
*sym
)
9017 not_constant
= false;
9018 if (sym
->as
!= NULL
)
9020 /* Unfortunately, !gfc_is_compile_time_shape hits a legal case that
9021 has not been simplified; parameter array references. Do the
9022 simplification now. */
9023 for (i
= 0; i
< sym
->as
->rank
+ sym
->as
->corank
; i
++)
9025 e
= sym
->as
->lower
[i
];
9026 if (e
&& (resolve_index_expr (e
) == FAILURE
9027 || !gfc_is_constant_expr (e
)))
9028 not_constant
= true;
9029 e
= sym
->as
->upper
[i
];
9030 if (e
&& (resolve_index_expr (e
) == FAILURE
9031 || !gfc_is_constant_expr (e
)))
9032 not_constant
= true;
9035 return not_constant
;
9038 /* Given a symbol and an initialization expression, add code to initialize
9039 the symbol to the function entry. */
9041 build_init_assign (gfc_symbol
*sym
, gfc_expr
*init
)
9045 gfc_namespace
*ns
= sym
->ns
;
9047 /* Search for the function namespace if this is a contained
9048 function without an explicit result. */
9049 if (sym
->attr
.function
&& sym
== sym
->result
9050 && sym
->name
!= sym
->ns
->proc_name
->name
)
9053 for (;ns
; ns
= ns
->sibling
)
9054 if (strcmp (ns
->proc_name
->name
, sym
->name
) == 0)
9060 gfc_free_expr (init
);
9064 /* Build an l-value expression for the result. */
9065 lval
= gfc_lval_expr_from_sym (sym
);
9067 /* Add the code at scope entry. */
9068 init_st
= gfc_get_code ();
9069 init_st
->next
= ns
->code
;
9072 /* Assign the default initializer to the l-value. */
9073 init_st
->loc
= sym
->declared_at
;
9074 init_st
->op
= EXEC_INIT_ASSIGN
;
9075 init_st
->expr1
= lval
;
9076 init_st
->expr2
= init
;
9079 /* Assign the default initializer to a derived type variable or result. */
9082 apply_default_init (gfc_symbol
*sym
)
9084 gfc_expr
*init
= NULL
;
9086 if (sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
9089 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
)
9090 init
= gfc_default_initializer (&sym
->ts
);
9095 build_init_assign (sym
, init
);
9098 /* Build an initializer for a local integer, real, complex, logical, or
9099 character variable, based on the command line flags finit-local-zero,
9100 finit-integer=, finit-real=, finit-logical=, and finit-runtime. Returns
9101 null if the symbol should not have a default initialization. */
9103 build_default_init_expr (gfc_symbol
*sym
)
9106 gfc_expr
*init_expr
;
9109 /* These symbols should never have a default initialization. */
9110 if ((sym
->attr
.dimension
&& !gfc_is_compile_time_shape (sym
->as
))
9111 || sym
->attr
.external
9113 || sym
->attr
.pointer
9114 || sym
->attr
.in_equivalence
9115 || sym
->attr
.in_common
9118 || sym
->attr
.cray_pointee
9119 || sym
->attr
.cray_pointer
)
9122 /* Now we'll try to build an initializer expression. */
9123 init_expr
= gfc_get_constant_expr (sym
->ts
.type
, sym
->ts
.kind
,
9126 /* We will only initialize integers, reals, complex, logicals, and
9127 characters, and only if the corresponding command-line flags
9128 were set. Otherwise, we free init_expr and return null. */
9129 switch (sym
->ts
.type
)
9132 if (gfc_option
.flag_init_integer
!= GFC_INIT_INTEGER_OFF
)
9133 mpz_init_set_si (init_expr
->value
.integer
,
9134 gfc_option
.flag_init_integer_value
);
9137 gfc_free_expr (init_expr
);
9143 mpfr_init (init_expr
->value
.real
);
9144 switch (gfc_option
.flag_init_real
)
9146 case GFC_INIT_REAL_SNAN
:
9147 init_expr
->is_snan
= 1;
9149 case GFC_INIT_REAL_NAN
:
9150 mpfr_set_nan (init_expr
->value
.real
);
9153 case GFC_INIT_REAL_INF
:
9154 mpfr_set_inf (init_expr
->value
.real
, 1);
9157 case GFC_INIT_REAL_NEG_INF
:
9158 mpfr_set_inf (init_expr
->value
.real
, -1);
9161 case GFC_INIT_REAL_ZERO
:
9162 mpfr_set_ui (init_expr
->value
.real
, 0.0, GFC_RND_MODE
);
9166 gfc_free_expr (init_expr
);
9173 mpc_init2 (init_expr
->value
.complex, mpfr_get_default_prec());
9174 switch (gfc_option
.flag_init_real
)
9176 case GFC_INIT_REAL_SNAN
:
9177 init_expr
->is_snan
= 1;
9179 case GFC_INIT_REAL_NAN
:
9180 mpfr_set_nan (mpc_realref (init_expr
->value
.complex));
9181 mpfr_set_nan (mpc_imagref (init_expr
->value
.complex));
9184 case GFC_INIT_REAL_INF
:
9185 mpfr_set_inf (mpc_realref (init_expr
->value
.complex), 1);
9186 mpfr_set_inf (mpc_imagref (init_expr
->value
.complex), 1);
9189 case GFC_INIT_REAL_NEG_INF
:
9190 mpfr_set_inf (mpc_realref (init_expr
->value
.complex), -1);
9191 mpfr_set_inf (mpc_imagref (init_expr
->value
.complex), -1);
9194 case GFC_INIT_REAL_ZERO
:
9195 mpc_set_ui (init_expr
->value
.complex, 0, GFC_MPC_RND_MODE
);
9199 gfc_free_expr (init_expr
);
9206 if (gfc_option
.flag_init_logical
== GFC_INIT_LOGICAL_FALSE
)
9207 init_expr
->value
.logical
= 0;
9208 else if (gfc_option
.flag_init_logical
== GFC_INIT_LOGICAL_TRUE
)
9209 init_expr
->value
.logical
= 1;
9212 gfc_free_expr (init_expr
);
9218 /* For characters, the length must be constant in order to
9219 create a default initializer. */
9220 if (gfc_option
.flag_init_character
== GFC_INIT_CHARACTER_ON
9221 && sym
->ts
.u
.cl
->length
9222 && sym
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9224 char_len
= mpz_get_si (sym
->ts
.u
.cl
->length
->value
.integer
);
9225 init_expr
->value
.character
.length
= char_len
;
9226 init_expr
->value
.character
.string
= gfc_get_wide_string (char_len
+1);
9227 for (i
= 0; i
< char_len
; i
++)
9228 init_expr
->value
.character
.string
[i
]
9229 = (unsigned char) gfc_option
.flag_init_character_value
;
9233 gfc_free_expr (init_expr
);
9239 gfc_free_expr (init_expr
);
9245 /* Add an initialization expression to a local variable. */
9247 apply_default_init_local (gfc_symbol
*sym
)
9249 gfc_expr
*init
= NULL
;
9251 /* The symbol should be a variable or a function return value. */
9252 if ((sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
9253 || (sym
->attr
.function
&& sym
->result
!= sym
))
9256 /* Try to build the initializer expression. If we can't initialize
9257 this symbol, then init will be NULL. */
9258 init
= build_default_init_expr (sym
);
9262 /* For saved variables, we don't want to add an initializer at
9263 function entry, so we just add a static initializer. */
9264 if (sym
->attr
.save
|| sym
->ns
->save_all
9265 || gfc_option
.flag_max_stack_var_size
== 0)
9267 /* Don't clobber an existing initializer! */
9268 gcc_assert (sym
->value
== NULL
);
9273 build_init_assign (sym
, init
);
9276 /* Resolution of common features of flavors variable and procedure. */
9279 resolve_fl_var_and_proc (gfc_symbol
*sym
, int mp_flag
)
9281 /* Constraints on deferred shape variable. */
9282 if (sym
->as
== NULL
|| sym
->as
->type
!= AS_DEFERRED
)
9284 if (sym
->attr
.allocatable
)
9286 if (sym
->attr
.dimension
)
9288 gfc_error ("Allocatable array '%s' at %L must have "
9289 "a deferred shape", sym
->name
, &sym
->declared_at
);
9292 else if (gfc_notify_std (GFC_STD_F2003
, "Scalar object '%s' at %L "
9293 "may not be ALLOCATABLE", sym
->name
,
9294 &sym
->declared_at
) == FAILURE
)
9298 if (sym
->attr
.pointer
&& sym
->attr
.dimension
)
9300 gfc_error ("Array pointer '%s' at %L must have a deferred shape",
9301 sym
->name
, &sym
->declared_at
);
9308 if (!mp_flag
&& !sym
->attr
.allocatable
&& !sym
->attr
.pointer
9309 && !sym
->attr
.dummy
&& sym
->ts
.type
!= BT_CLASS
)
9311 gfc_error ("Array '%s' at %L cannot have a deferred shape",
9312 sym
->name
, &sym
->declared_at
);
9317 /* Constraints on polymorphic variables. */
9318 if (sym
->ts
.type
== BT_CLASS
&& !(sym
->result
&& sym
->result
!= sym
))
9321 if (!gfc_type_is_extensible (CLASS_DATA (sym
)->ts
.u
.derived
))
9323 gfc_error ("Type '%s' of CLASS variable '%s' at %L is not extensible",
9324 CLASS_DATA (sym
)->ts
.u
.derived
->name
, sym
->name
,
9330 /* Assume that use associated symbols were checked in the module ns. */
9331 if (!sym
->attr
.class_ok
&& !sym
->attr
.use_assoc
)
9333 gfc_error ("CLASS variable '%s' at %L must be dummy, allocatable "
9334 "or pointer", sym
->name
, &sym
->declared_at
);
9343 /* Additional checks for symbols with flavor variable and derived
9344 type. To be called from resolve_fl_variable. */
9347 resolve_fl_variable_derived (gfc_symbol
*sym
, int no_init_flag
)
9349 gcc_assert (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
);
9351 /* Check to see if a derived type is blocked from being host
9352 associated by the presence of another class I symbol in the same
9353 namespace. 14.6.1.3 of the standard and the discussion on
9354 comp.lang.fortran. */
9355 if (sym
->ns
!= sym
->ts
.u
.derived
->ns
9356 && sym
->ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
9359 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 0, &s
);
9360 if (s
&& s
->attr
.flavor
!= FL_DERIVED
)
9362 gfc_error ("The type '%s' cannot be host associated at %L "
9363 "because it is blocked by an incompatible object "
9364 "of the same name declared at %L",
9365 sym
->ts
.u
.derived
->name
, &sym
->declared_at
,
9371 /* 4th constraint in section 11.3: "If an object of a type for which
9372 component-initialization is specified (R429) appears in the
9373 specification-part of a module and does not have the ALLOCATABLE
9374 or POINTER attribute, the object shall have the SAVE attribute."
9376 The check for initializers is performed with
9377 gfc_has_default_initializer because gfc_default_initializer generates
9378 a hidden default for allocatable components. */
9379 if (!(sym
->value
|| no_init_flag
) && sym
->ns
->proc_name
9380 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
9381 && !sym
->ns
->save_all
&& !sym
->attr
.save
9382 && !sym
->attr
.pointer
&& !sym
->attr
.allocatable
9383 && gfc_has_default_initializer (sym
->ts
.u
.derived
)
9384 && gfc_notify_std (GFC_STD_F2008
, "Fortran 2008: Implied SAVE for "
9385 "module variable '%s' at %L, needed due to "
9386 "the default initialization", sym
->name
,
9387 &sym
->declared_at
) == FAILURE
)
9390 /* Assign default initializer. */
9391 if (!(sym
->value
|| sym
->attr
.pointer
|| sym
->attr
.allocatable
)
9392 && (!no_init_flag
|| sym
->attr
.intent
== INTENT_OUT
))
9394 sym
->value
= gfc_default_initializer (&sym
->ts
);
9401 /* Resolve symbols with flavor variable. */
9404 resolve_fl_variable (gfc_symbol
*sym
, int mp_flag
)
9406 int no_init_flag
, automatic_flag
;
9408 const char *auto_save_msg
;
9410 auto_save_msg
= "Automatic object '%s' at %L cannot have the "
9413 if (resolve_fl_var_and_proc (sym
, mp_flag
) == FAILURE
)
9416 /* Set this flag to check that variables are parameters of all entries.
9417 This check is effected by the call to gfc_resolve_expr through
9418 is_non_constant_shape_array. */
9419 specification_expr
= 1;
9421 if (sym
->ns
->proc_name
9422 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
9423 || sym
->ns
->proc_name
->attr
.is_main_program
)
9424 && !sym
->attr
.use_assoc
9425 && !sym
->attr
.allocatable
9426 && !sym
->attr
.pointer
9427 && is_non_constant_shape_array (sym
))
9429 /* The shape of a main program or module array needs to be
9431 gfc_error ("The module or main program array '%s' at %L must "
9432 "have constant shape", sym
->name
, &sym
->declared_at
);
9433 specification_expr
= 0;
9437 if (sym
->ts
.type
== BT_CHARACTER
)
9439 /* Make sure that character string variables with assumed length are
9441 e
= sym
->ts
.u
.cl
->length
;
9442 if (e
== NULL
&& !sym
->attr
.dummy
&& !sym
->attr
.result
)
9444 gfc_error ("Entity with assumed character length at %L must be a "
9445 "dummy argument or a PARAMETER", &sym
->declared_at
);
9449 if (e
&& sym
->attr
.save
&& !gfc_is_constant_expr (e
))
9451 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
9455 if (!gfc_is_constant_expr (e
)
9456 && !(e
->expr_type
== EXPR_VARIABLE
9457 && e
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
)
9458 && sym
->ns
->proc_name
9459 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
9460 || sym
->ns
->proc_name
->attr
.is_main_program
)
9461 && !sym
->attr
.use_assoc
)
9463 gfc_error ("'%s' at %L must have constant character length "
9464 "in this context", sym
->name
, &sym
->declared_at
);
9469 if (sym
->value
== NULL
&& sym
->attr
.referenced
)
9470 apply_default_init_local (sym
); /* Try to apply a default initialization. */
9472 /* Determine if the symbol may not have an initializer. */
9473 no_init_flag
= automatic_flag
= 0;
9474 if (sym
->attr
.allocatable
|| sym
->attr
.external
|| sym
->attr
.dummy
9475 || sym
->attr
.intrinsic
|| sym
->attr
.result
)
9477 else if ((sym
->attr
.dimension
|| sym
->attr
.codimension
) && !sym
->attr
.pointer
9478 && is_non_constant_shape_array (sym
))
9480 no_init_flag
= automatic_flag
= 1;
9482 /* Also, they must not have the SAVE attribute.
9483 SAVE_IMPLICIT is checked below. */
9484 if (sym
->attr
.save
== SAVE_EXPLICIT
)
9486 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
9491 /* Ensure that any initializer is simplified. */
9493 gfc_simplify_expr (sym
->value
, 1);
9495 /* Reject illegal initializers. */
9496 if (!sym
->mark
&& sym
->value
)
9498 if (sym
->attr
.allocatable
)
9499 gfc_error ("Allocatable '%s' at %L cannot have an initializer",
9500 sym
->name
, &sym
->declared_at
);
9501 else if (sym
->attr
.external
)
9502 gfc_error ("External '%s' at %L cannot have an initializer",
9503 sym
->name
, &sym
->declared_at
);
9504 else if (sym
->attr
.dummy
9505 && !(sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.intent
== INTENT_OUT
))
9506 gfc_error ("Dummy '%s' at %L cannot have an initializer",
9507 sym
->name
, &sym
->declared_at
);
9508 else if (sym
->attr
.intrinsic
)
9509 gfc_error ("Intrinsic '%s' at %L cannot have an initializer",
9510 sym
->name
, &sym
->declared_at
);
9511 else if (sym
->attr
.result
)
9512 gfc_error ("Function result '%s' at %L cannot have an initializer",
9513 sym
->name
, &sym
->declared_at
);
9514 else if (automatic_flag
)
9515 gfc_error ("Automatic array '%s' at %L cannot have an initializer",
9516 sym
->name
, &sym
->declared_at
);
9523 if (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
)
9524 return resolve_fl_variable_derived (sym
, no_init_flag
);
9530 /* Resolve a procedure. */
9533 resolve_fl_procedure (gfc_symbol
*sym
, int mp_flag
)
9535 gfc_formal_arglist
*arg
;
9537 if (sym
->attr
.function
9538 && resolve_fl_var_and_proc (sym
, mp_flag
) == FAILURE
)
9541 if (sym
->ts
.type
== BT_CHARACTER
)
9543 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
9545 if (cl
&& cl
->length
&& gfc_is_constant_expr (cl
->length
)
9546 && resolve_charlen (cl
) == FAILURE
)
9549 if ((!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
9550 && sym
->attr
.proc
== PROC_ST_FUNCTION
)
9552 gfc_error ("Character-valued statement function '%s' at %L must "
9553 "have constant length", sym
->name
, &sym
->declared_at
);
9558 /* Ensure that derived type for are not of a private type. Internal
9559 module procedures are excluded by 2.2.3.3 - i.e., they are not
9560 externally accessible and can access all the objects accessible in
9562 if (!(sym
->ns
->parent
9563 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
9564 && gfc_check_access(sym
->attr
.access
, sym
->ns
->default_access
))
9566 gfc_interface
*iface
;
9568 for (arg
= sym
->formal
; arg
; arg
= arg
->next
)
9571 && arg
->sym
->ts
.type
== BT_DERIVED
9572 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
9573 && !gfc_check_access (arg
->sym
->ts
.u
.derived
->attr
.access
,
9574 arg
->sym
->ts
.u
.derived
->ns
->default_access
)
9575 && gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: '%s' is of a "
9576 "PRIVATE type and cannot be a dummy argument"
9577 " of '%s', which is PUBLIC at %L",
9578 arg
->sym
->name
, sym
->name
, &sym
->declared_at
)
9581 /* Stop this message from recurring. */
9582 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
9587 /* PUBLIC interfaces may expose PRIVATE procedures that take types
9588 PRIVATE to the containing module. */
9589 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
9591 for (arg
= iface
->sym
->formal
; arg
; arg
= arg
->next
)
9594 && arg
->sym
->ts
.type
== BT_DERIVED
9595 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
9596 && !gfc_check_access (arg
->sym
->ts
.u
.derived
->attr
.access
,
9597 arg
->sym
->ts
.u
.derived
->ns
->default_access
)
9598 && gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: Procedure "
9599 "'%s' in PUBLIC interface '%s' at %L "
9600 "takes dummy arguments of '%s' which is "
9601 "PRIVATE", iface
->sym
->name
, sym
->name
,
9602 &iface
->sym
->declared_at
,
9603 gfc_typename (&arg
->sym
->ts
)) == FAILURE
)
9605 /* Stop this message from recurring. */
9606 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
9612 /* PUBLIC interfaces may expose PRIVATE procedures that take types
9613 PRIVATE to the containing module. */
9614 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
9616 for (arg
= iface
->sym
->formal
; arg
; arg
= arg
->next
)
9619 && arg
->sym
->ts
.type
== BT_DERIVED
9620 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
9621 && !gfc_check_access (arg
->sym
->ts
.u
.derived
->attr
.access
,
9622 arg
->sym
->ts
.u
.derived
->ns
->default_access
)
9623 && gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: Procedure "
9624 "'%s' in PUBLIC interface '%s' at %L "
9625 "takes dummy arguments of '%s' which is "
9626 "PRIVATE", iface
->sym
->name
, sym
->name
,
9627 &iface
->sym
->declared_at
,
9628 gfc_typename (&arg
->sym
->ts
)) == FAILURE
)
9630 /* Stop this message from recurring. */
9631 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
9638 if (sym
->attr
.function
&& sym
->value
&& sym
->attr
.proc
!= PROC_ST_FUNCTION
9639 && !sym
->attr
.proc_pointer
)
9641 gfc_error ("Function '%s' at %L cannot have an initializer",
9642 sym
->name
, &sym
->declared_at
);
9646 /* An external symbol may not have an initializer because it is taken to be
9647 a procedure. Exception: Procedure Pointers. */
9648 if (sym
->attr
.external
&& sym
->value
&& !sym
->attr
.proc_pointer
)
9650 gfc_error ("External object '%s' at %L may not have an initializer",
9651 sym
->name
, &sym
->declared_at
);
9655 /* An elemental function is required to return a scalar 12.7.1 */
9656 if (sym
->attr
.elemental
&& sym
->attr
.function
&& sym
->as
)
9658 gfc_error ("ELEMENTAL function '%s' at %L must have a scalar "
9659 "result", sym
->name
, &sym
->declared_at
);
9660 /* Reset so that the error only occurs once. */
9661 sym
->attr
.elemental
= 0;
9665 /* 5.1.1.5 of the Standard: A function name declared with an asterisk
9666 char-len-param shall not be array-valued, pointer-valued, recursive
9667 or pure. ....snip... A character value of * may only be used in the
9668 following ways: (i) Dummy arg of procedure - dummy associates with
9669 actual length; (ii) To declare a named constant; or (iii) External
9670 function - but length must be declared in calling scoping unit. */
9671 if (sym
->attr
.function
9672 && sym
->ts
.type
== BT_CHARACTER
9673 && sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
== NULL
)
9675 if ((sym
->as
&& sym
->as
->rank
) || (sym
->attr
.pointer
)
9676 || (sym
->attr
.recursive
) || (sym
->attr
.pure
))
9678 if (sym
->as
&& sym
->as
->rank
)
9679 gfc_error ("CHARACTER(*) function '%s' at %L cannot be "
9680 "array-valued", sym
->name
, &sym
->declared_at
);
9682 if (sym
->attr
.pointer
)
9683 gfc_error ("CHARACTER(*) function '%s' at %L cannot be "
9684 "pointer-valued", sym
->name
, &sym
->declared_at
);
9687 gfc_error ("CHARACTER(*) function '%s' at %L cannot be "
9688 "pure", sym
->name
, &sym
->declared_at
);
9690 if (sym
->attr
.recursive
)
9691 gfc_error ("CHARACTER(*) function '%s' at %L cannot be "
9692 "recursive", sym
->name
, &sym
->declared_at
);
9697 /* Appendix B.2 of the standard. Contained functions give an
9698 error anyway. Fixed-form is likely to be F77/legacy. */
9699 if (!sym
->attr
.contained
&& gfc_current_form
!= FORM_FIXED
)
9700 gfc_notify_std (GFC_STD_F95_OBS
, "Obsolescent feature: "
9701 "CHARACTER(*) function '%s' at %L",
9702 sym
->name
, &sym
->declared_at
);
9705 if (sym
->attr
.is_bind_c
&& sym
->attr
.is_c_interop
!= 1)
9707 gfc_formal_arglist
*curr_arg
;
9708 int has_non_interop_arg
= 0;
9710 if (verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
9711 sym
->common_block
) == FAILURE
)
9713 /* Clear these to prevent looking at them again if there was an
9715 sym
->attr
.is_bind_c
= 0;
9716 sym
->attr
.is_c_interop
= 0;
9717 sym
->ts
.is_c_interop
= 0;
9721 /* So far, no errors have been found. */
9722 sym
->attr
.is_c_interop
= 1;
9723 sym
->ts
.is_c_interop
= 1;
9726 curr_arg
= sym
->formal
;
9727 while (curr_arg
!= NULL
)
9729 /* Skip implicitly typed dummy args here. */
9730 if (curr_arg
->sym
->attr
.implicit_type
== 0)
9731 if (verify_c_interop_param (curr_arg
->sym
) == FAILURE
)
9732 /* If something is found to fail, record the fact so we
9733 can mark the symbol for the procedure as not being
9734 BIND(C) to try and prevent multiple errors being
9736 has_non_interop_arg
= 1;
9738 curr_arg
= curr_arg
->next
;
9741 /* See if any of the arguments were not interoperable and if so, clear
9742 the procedure symbol to prevent duplicate error messages. */
9743 if (has_non_interop_arg
!= 0)
9745 sym
->attr
.is_c_interop
= 0;
9746 sym
->ts
.is_c_interop
= 0;
9747 sym
->attr
.is_bind_c
= 0;
9751 if (!sym
->attr
.proc_pointer
)
9753 if (sym
->attr
.save
== SAVE_EXPLICIT
)
9755 gfc_error ("PROCEDURE attribute conflicts with SAVE attribute "
9756 "in '%s' at %L", sym
->name
, &sym
->declared_at
);
9759 if (sym
->attr
.intent
)
9761 gfc_error ("PROCEDURE attribute conflicts with INTENT attribute "
9762 "in '%s' at %L", sym
->name
, &sym
->declared_at
);
9765 if (sym
->attr
.subroutine
&& sym
->attr
.result
)
9767 gfc_error ("PROCEDURE attribute conflicts with RESULT attribute "
9768 "in '%s' at %L", sym
->name
, &sym
->declared_at
);
9771 if (sym
->attr
.external
&& sym
->attr
.function
9772 && ((sym
->attr
.if_source
== IFSRC_DECL
&& !sym
->attr
.procedure
)
9773 || sym
->attr
.contained
))
9775 gfc_error ("EXTERNAL attribute conflicts with FUNCTION attribute "
9776 "in '%s' at %L", sym
->name
, &sym
->declared_at
);
9779 if (strcmp ("ppr@", sym
->name
) == 0)
9781 gfc_error ("Procedure pointer result '%s' at %L "
9782 "is missing the pointer attribute",
9783 sym
->ns
->proc_name
->name
, &sym
->declared_at
);
9792 /* Resolve a list of finalizer procedures. That is, after they have hopefully
9793 been defined and we now know their defined arguments, check that they fulfill
9794 the requirements of the standard for procedures used as finalizers. */
9797 gfc_resolve_finalizers (gfc_symbol
* derived
)
9799 gfc_finalizer
* list
;
9800 gfc_finalizer
** prev_link
; /* For removing wrong entries from the list. */
9801 gfc_try result
= SUCCESS
;
9802 bool seen_scalar
= false;
9804 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->finalizers
)
9807 /* Walk over the list of finalizer-procedures, check them, and if any one
9808 does not fit in with the standard's definition, print an error and remove
9809 it from the list. */
9810 prev_link
= &derived
->f2k_derived
->finalizers
;
9811 for (list
= derived
->f2k_derived
->finalizers
; list
; list
= *prev_link
)
9817 /* Skip this finalizer if we already resolved it. */
9818 if (list
->proc_tree
)
9820 prev_link
= &(list
->next
);
9824 /* Check this exists and is a SUBROUTINE. */
9825 if (!list
->proc_sym
->attr
.subroutine
)
9827 gfc_error ("FINAL procedure '%s' at %L is not a SUBROUTINE",
9828 list
->proc_sym
->name
, &list
->where
);
9832 /* We should have exactly one argument. */
9833 if (!list
->proc_sym
->formal
|| list
->proc_sym
->formal
->next
)
9835 gfc_error ("FINAL procedure at %L must have exactly one argument",
9839 arg
= list
->proc_sym
->formal
->sym
;
9841 /* This argument must be of our type. */
9842 if (arg
->ts
.type
!= BT_DERIVED
|| arg
->ts
.u
.derived
!= derived
)
9844 gfc_error ("Argument of FINAL procedure at %L must be of type '%s'",
9845 &arg
->declared_at
, derived
->name
);
9849 /* It must neither be a pointer nor allocatable nor optional. */
9850 if (arg
->attr
.pointer
)
9852 gfc_error ("Argument of FINAL procedure at %L must not be a POINTER",
9856 if (arg
->attr
.allocatable
)
9858 gfc_error ("Argument of FINAL procedure at %L must not be"
9859 " ALLOCATABLE", &arg
->declared_at
);
9862 if (arg
->attr
.optional
)
9864 gfc_error ("Argument of FINAL procedure at %L must not be OPTIONAL",
9869 /* It must not be INTENT(OUT). */
9870 if (arg
->attr
.intent
== INTENT_OUT
)
9872 gfc_error ("Argument of FINAL procedure at %L must not be"
9873 " INTENT(OUT)", &arg
->declared_at
);
9877 /* Warn if the procedure is non-scalar and not assumed shape. */
9878 if (gfc_option
.warn_surprising
&& arg
->as
&& arg
->as
->rank
> 0
9879 && arg
->as
->type
!= AS_ASSUMED_SHAPE
)
9880 gfc_warning ("Non-scalar FINAL procedure at %L should have assumed"
9881 " shape argument", &arg
->declared_at
);
9883 /* Check that it does not match in kind and rank with a FINAL procedure
9884 defined earlier. To really loop over the *earlier* declarations,
9885 we need to walk the tail of the list as new ones were pushed at the
9887 /* TODO: Handle kind parameters once they are implemented. */
9888 my_rank
= (arg
->as
? arg
->as
->rank
: 0);
9889 for (i
= list
->next
; i
; i
= i
->next
)
9891 /* Argument list might be empty; that is an error signalled earlier,
9892 but we nevertheless continued resolving. */
9893 if (i
->proc_sym
->formal
)
9895 gfc_symbol
* i_arg
= i
->proc_sym
->formal
->sym
;
9896 const int i_rank
= (i_arg
->as
? i_arg
->as
->rank
: 0);
9897 if (i_rank
== my_rank
)
9899 gfc_error ("FINAL procedure '%s' declared at %L has the same"
9900 " rank (%d) as '%s'",
9901 list
->proc_sym
->name
, &list
->where
, my_rank
,
9908 /* Is this the/a scalar finalizer procedure? */
9909 if (!arg
->as
|| arg
->as
->rank
== 0)
9912 /* Find the symtree for this procedure. */
9913 gcc_assert (!list
->proc_tree
);
9914 list
->proc_tree
= gfc_find_sym_in_symtree (list
->proc_sym
);
9916 prev_link
= &list
->next
;
9919 /* Remove wrong nodes immediately from the list so we don't risk any
9920 troubles in the future when they might fail later expectations. */
9924 *prev_link
= list
->next
;
9925 gfc_free_finalizer (i
);
9928 /* Warn if we haven't seen a scalar finalizer procedure (but we know there
9929 were nodes in the list, must have been for arrays. It is surely a good
9930 idea to have a scalar version there if there's something to finalize. */
9931 if (gfc_option
.warn_surprising
&& result
== SUCCESS
&& !seen_scalar
)
9932 gfc_warning ("Only array FINAL procedures declared for derived type '%s'"
9933 " defined at %L, suggest also scalar one",
9934 derived
->name
, &derived
->declared_at
);
9936 /* TODO: Remove this error when finalization is finished. */
9937 gfc_error ("Finalization at %L is not yet implemented",
9938 &derived
->declared_at
);
9944 /* Check that it is ok for the typebound procedure proc to override the
9948 check_typebound_override (gfc_symtree
* proc
, gfc_symtree
* old
)
9951 const gfc_symbol
* proc_target
;
9952 const gfc_symbol
* old_target
;
9953 unsigned proc_pass_arg
, old_pass_arg
, argpos
;
9954 gfc_formal_arglist
* proc_formal
;
9955 gfc_formal_arglist
* old_formal
;
9957 /* This procedure should only be called for non-GENERIC proc. */
9958 gcc_assert (!proc
->n
.tb
->is_generic
);
9960 /* If the overwritten procedure is GENERIC, this is an error. */
9961 if (old
->n
.tb
->is_generic
)
9963 gfc_error ("Can't overwrite GENERIC '%s' at %L",
9964 old
->name
, &proc
->n
.tb
->where
);
9968 where
= proc
->n
.tb
->where
;
9969 proc_target
= proc
->n
.tb
->u
.specific
->n
.sym
;
9970 old_target
= old
->n
.tb
->u
.specific
->n
.sym
;
9972 /* Check that overridden binding is not NON_OVERRIDABLE. */
9973 if (old
->n
.tb
->non_overridable
)
9975 gfc_error ("'%s' at %L overrides a procedure binding declared"
9976 " NON_OVERRIDABLE", proc
->name
, &where
);
9980 /* It's an error to override a non-DEFERRED procedure with a DEFERRED one. */
9981 if (!old
->n
.tb
->deferred
&& proc
->n
.tb
->deferred
)
9983 gfc_error ("'%s' at %L must not be DEFERRED as it overrides a"
9984 " non-DEFERRED binding", proc
->name
, &where
);
9988 /* If the overridden binding is PURE, the overriding must be, too. */
9989 if (old_target
->attr
.pure
&& !proc_target
->attr
.pure
)
9991 gfc_error ("'%s' at %L overrides a PURE procedure and must also be PURE",
9992 proc
->name
, &where
);
9996 /* If the overridden binding is ELEMENTAL, the overriding must be, too. If it
9997 is not, the overriding must not be either. */
9998 if (old_target
->attr
.elemental
&& !proc_target
->attr
.elemental
)
10000 gfc_error ("'%s' at %L overrides an ELEMENTAL procedure and must also be"
10001 " ELEMENTAL", proc
->name
, &where
);
10004 if (!old_target
->attr
.elemental
&& proc_target
->attr
.elemental
)
10006 gfc_error ("'%s' at %L overrides a non-ELEMENTAL procedure and must not"
10007 " be ELEMENTAL, either", proc
->name
, &where
);
10011 /* If the overridden binding is a SUBROUTINE, the overriding must also be a
10013 if (old_target
->attr
.subroutine
&& !proc_target
->attr
.subroutine
)
10015 gfc_error ("'%s' at %L overrides a SUBROUTINE and must also be a"
10016 " SUBROUTINE", proc
->name
, &where
);
10020 /* If the overridden binding is a FUNCTION, the overriding must also be a
10021 FUNCTION and have the same characteristics. */
10022 if (old_target
->attr
.function
)
10024 if (!proc_target
->attr
.function
)
10026 gfc_error ("'%s' at %L overrides a FUNCTION and must also be a"
10027 " FUNCTION", proc
->name
, &where
);
10031 /* FIXME: Do more comprehensive checking (including, for instance, the
10032 rank and array-shape). */
10033 gcc_assert (proc_target
->result
&& old_target
->result
);
10034 if (!gfc_compare_types (&proc_target
->result
->ts
,
10035 &old_target
->result
->ts
))
10037 gfc_error ("'%s' at %L and the overridden FUNCTION should have"
10038 " matching result types", proc
->name
, &where
);
10043 /* If the overridden binding is PUBLIC, the overriding one must not be
10045 if (old
->n
.tb
->access
== ACCESS_PUBLIC
10046 && proc
->n
.tb
->access
== ACCESS_PRIVATE
)
10048 gfc_error ("'%s' at %L overrides a PUBLIC procedure and must not be"
10049 " PRIVATE", proc
->name
, &where
);
10053 /* Compare the formal argument lists of both procedures. This is also abused
10054 to find the position of the passed-object dummy arguments of both
10055 bindings as at least the overridden one might not yet be resolved and we
10056 need those positions in the check below. */
10057 proc_pass_arg
= old_pass_arg
= 0;
10058 if (!proc
->n
.tb
->nopass
&& !proc
->n
.tb
->pass_arg
)
10060 if (!old
->n
.tb
->nopass
&& !old
->n
.tb
->pass_arg
)
10063 for (proc_formal
= proc_target
->formal
, old_formal
= old_target
->formal
;
10064 proc_formal
&& old_formal
;
10065 proc_formal
= proc_formal
->next
, old_formal
= old_formal
->next
)
10067 if (proc
->n
.tb
->pass_arg
10068 && !strcmp (proc
->n
.tb
->pass_arg
, proc_formal
->sym
->name
))
10069 proc_pass_arg
= argpos
;
10070 if (old
->n
.tb
->pass_arg
10071 && !strcmp (old
->n
.tb
->pass_arg
, old_formal
->sym
->name
))
10072 old_pass_arg
= argpos
;
10074 /* Check that the names correspond. */
10075 if (strcmp (proc_formal
->sym
->name
, old_formal
->sym
->name
))
10077 gfc_error ("Dummy argument '%s' of '%s' at %L should be named '%s' as"
10078 " to match the corresponding argument of the overridden"
10079 " procedure", proc_formal
->sym
->name
, proc
->name
, &where
,
10080 old_formal
->sym
->name
);
10084 /* Check that the types correspond if neither is the passed-object
10086 /* FIXME: Do more comprehensive testing here. */
10087 if (proc_pass_arg
!= argpos
&& old_pass_arg
!= argpos
10088 && !gfc_compare_types (&proc_formal
->sym
->ts
, &old_formal
->sym
->ts
))
10090 gfc_error ("Types mismatch for dummy argument '%s' of '%s' %L "
10091 "in respect to the overridden procedure",
10092 proc_formal
->sym
->name
, proc
->name
, &where
);
10098 if (proc_formal
|| old_formal
)
10100 gfc_error ("'%s' at %L must have the same number of formal arguments as"
10101 " the overridden procedure", proc
->name
, &where
);
10105 /* If the overridden binding is NOPASS, the overriding one must also be
10107 if (old
->n
.tb
->nopass
&& !proc
->n
.tb
->nopass
)
10109 gfc_error ("'%s' at %L overrides a NOPASS binding and must also be"
10110 " NOPASS", proc
->name
, &where
);
10114 /* If the overridden binding is PASS(x), the overriding one must also be
10115 PASS and the passed-object dummy arguments must correspond. */
10116 if (!old
->n
.tb
->nopass
)
10118 if (proc
->n
.tb
->nopass
)
10120 gfc_error ("'%s' at %L overrides a binding with PASS and must also be"
10121 " PASS", proc
->name
, &where
);
10125 if (proc_pass_arg
!= old_pass_arg
)
10127 gfc_error ("Passed-object dummy argument of '%s' at %L must be at"
10128 " the same position as the passed-object dummy argument of"
10129 " the overridden procedure", proc
->name
, &where
);
10138 /* Check if two GENERIC targets are ambiguous and emit an error is they are. */
10141 check_generic_tbp_ambiguity (gfc_tbp_generic
* t1
, gfc_tbp_generic
* t2
,
10142 const char* generic_name
, locus where
)
10147 gcc_assert (t1
->specific
&& t2
->specific
);
10148 gcc_assert (!t1
->specific
->is_generic
);
10149 gcc_assert (!t2
->specific
->is_generic
);
10151 sym1
= t1
->specific
->u
.specific
->n
.sym
;
10152 sym2
= t2
->specific
->u
.specific
->n
.sym
;
10157 /* Both must be SUBROUTINEs or both must be FUNCTIONs. */
10158 if (sym1
->attr
.subroutine
!= sym2
->attr
.subroutine
10159 || sym1
->attr
.function
!= sym2
->attr
.function
)
10161 gfc_error ("'%s' and '%s' can't be mixed FUNCTION/SUBROUTINE for"
10162 " GENERIC '%s' at %L",
10163 sym1
->name
, sym2
->name
, generic_name
, &where
);
10167 /* Compare the interfaces. */
10168 if (gfc_compare_interfaces (sym1
, sym2
, sym2
->name
, 1, 0, NULL
, 0))
10170 gfc_error ("'%s' and '%s' for GENERIC '%s' at %L are ambiguous",
10171 sym1
->name
, sym2
->name
, generic_name
, &where
);
10179 /* Worker function for resolving a generic procedure binding; this is used to
10180 resolve GENERIC as well as user and intrinsic OPERATOR typebound procedures.
10182 The difference between those cases is finding possible inherited bindings
10183 that are overridden, as one has to look for them in tb_sym_root,
10184 tb_uop_root or tb_op, respectively. Thus the caller must already find
10185 the super-type and set p->overridden correctly. */
10188 resolve_tb_generic_targets (gfc_symbol
* super_type
,
10189 gfc_typebound_proc
* p
, const char* name
)
10191 gfc_tbp_generic
* target
;
10192 gfc_symtree
* first_target
;
10193 gfc_symtree
* inherited
;
10195 gcc_assert (p
&& p
->is_generic
);
10197 /* Try to find the specific bindings for the symtrees in our target-list. */
10198 gcc_assert (p
->u
.generic
);
10199 for (target
= p
->u
.generic
; target
; target
= target
->next
)
10200 if (!target
->specific
)
10202 gfc_typebound_proc
* overridden_tbp
;
10203 gfc_tbp_generic
* g
;
10204 const char* target_name
;
10206 target_name
= target
->specific_st
->name
;
10208 /* Defined for this type directly. */
10209 if (target
->specific_st
->n
.tb
)
10211 target
->specific
= target
->specific_st
->n
.tb
;
10212 goto specific_found
;
10215 /* Look for an inherited specific binding. */
10218 inherited
= gfc_find_typebound_proc (super_type
, NULL
, target_name
,
10223 gcc_assert (inherited
->n
.tb
);
10224 target
->specific
= inherited
->n
.tb
;
10225 goto specific_found
;
10229 gfc_error ("Undefined specific binding '%s' as target of GENERIC '%s'"
10230 " at %L", target_name
, name
, &p
->where
);
10233 /* Once we've found the specific binding, check it is not ambiguous with
10234 other specifics already found or inherited for the same GENERIC. */
10236 gcc_assert (target
->specific
);
10238 /* This must really be a specific binding! */
10239 if (target
->specific
->is_generic
)
10241 gfc_error ("GENERIC '%s' at %L must target a specific binding,"
10242 " '%s' is GENERIC, too", name
, &p
->where
, target_name
);
10246 /* Check those already resolved on this type directly. */
10247 for (g
= p
->u
.generic
; g
; g
= g
->next
)
10248 if (g
!= target
&& g
->specific
10249 && check_generic_tbp_ambiguity (target
, g
, name
, p
->where
)
10253 /* Check for ambiguity with inherited specific targets. */
10254 for (overridden_tbp
= p
->overridden
; overridden_tbp
;
10255 overridden_tbp
= overridden_tbp
->overridden
)
10256 if (overridden_tbp
->is_generic
)
10258 for (g
= overridden_tbp
->u
.generic
; g
; g
= g
->next
)
10260 gcc_assert (g
->specific
);
10261 if (check_generic_tbp_ambiguity (target
, g
,
10262 name
, p
->where
) == FAILURE
)
10268 /* If we attempt to "overwrite" a specific binding, this is an error. */
10269 if (p
->overridden
&& !p
->overridden
->is_generic
)
10271 gfc_error ("GENERIC '%s' at %L can't overwrite specific binding with"
10272 " the same name", name
, &p
->where
);
10276 /* Take the SUBROUTINE/FUNCTION attributes of the first specific target, as
10277 all must have the same attributes here. */
10278 first_target
= p
->u
.generic
->specific
->u
.specific
;
10279 gcc_assert (first_target
);
10280 p
->subroutine
= first_target
->n
.sym
->attr
.subroutine
;
10281 p
->function
= first_target
->n
.sym
->attr
.function
;
10287 /* Resolve a GENERIC procedure binding for a derived type. */
10290 resolve_typebound_generic (gfc_symbol
* derived
, gfc_symtree
* st
)
10292 gfc_symbol
* super_type
;
10294 /* Find the overridden binding if any. */
10295 st
->n
.tb
->overridden
= NULL
;
10296 super_type
= gfc_get_derived_super_type (derived
);
10299 gfc_symtree
* overridden
;
10300 overridden
= gfc_find_typebound_proc (super_type
, NULL
, st
->name
,
10303 if (overridden
&& overridden
->n
.tb
)
10304 st
->n
.tb
->overridden
= overridden
->n
.tb
;
10307 /* Resolve using worker function. */
10308 return resolve_tb_generic_targets (super_type
, st
->n
.tb
, st
->name
);
10312 /* Retrieve the target-procedure of an operator binding and do some checks in
10313 common for intrinsic and user-defined type-bound operators. */
10316 get_checked_tb_operator_target (gfc_tbp_generic
* target
, locus where
)
10318 gfc_symbol
* target_proc
;
10320 gcc_assert (target
->specific
&& !target
->specific
->is_generic
);
10321 target_proc
= target
->specific
->u
.specific
->n
.sym
;
10322 gcc_assert (target_proc
);
10324 /* All operator bindings must have a passed-object dummy argument. */
10325 if (target
->specific
->nopass
)
10327 gfc_error ("Type-bound operator at %L can't be NOPASS", &where
);
10331 return target_proc
;
10335 /* Resolve a type-bound intrinsic operator. */
10338 resolve_typebound_intrinsic_op (gfc_symbol
* derived
, gfc_intrinsic_op op
,
10339 gfc_typebound_proc
* p
)
10341 gfc_symbol
* super_type
;
10342 gfc_tbp_generic
* target
;
10344 /* If there's already an error here, do nothing (but don't fail again). */
10348 /* Operators should always be GENERIC bindings. */
10349 gcc_assert (p
->is_generic
);
10351 /* Look for an overridden binding. */
10352 super_type
= gfc_get_derived_super_type (derived
);
10353 if (super_type
&& super_type
->f2k_derived
)
10354 p
->overridden
= gfc_find_typebound_intrinsic_op (super_type
, NULL
,
10357 p
->overridden
= NULL
;
10359 /* Resolve general GENERIC properties using worker function. */
10360 if (resolve_tb_generic_targets (super_type
, p
, gfc_op2string (op
)) == FAILURE
)
10363 /* Check the targets to be procedures of correct interface. */
10364 for (target
= p
->u
.generic
; target
; target
= target
->next
)
10366 gfc_symbol
* target_proc
;
10368 target_proc
= get_checked_tb_operator_target (target
, p
->where
);
10372 if (!gfc_check_operator_interface (target_proc
, op
, p
->where
))
10384 /* Resolve a type-bound user operator (tree-walker callback). */
10386 static gfc_symbol
* resolve_bindings_derived
;
10387 static gfc_try resolve_bindings_result
;
10389 static gfc_try
check_uop_procedure (gfc_symbol
* sym
, locus where
);
10392 resolve_typebound_user_op (gfc_symtree
* stree
)
10394 gfc_symbol
* super_type
;
10395 gfc_tbp_generic
* target
;
10397 gcc_assert (stree
&& stree
->n
.tb
);
10399 if (stree
->n
.tb
->error
)
10402 /* Operators should always be GENERIC bindings. */
10403 gcc_assert (stree
->n
.tb
->is_generic
);
10405 /* Find overridden procedure, if any. */
10406 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
10407 if (super_type
&& super_type
->f2k_derived
)
10409 gfc_symtree
* overridden
;
10410 overridden
= gfc_find_typebound_user_op (super_type
, NULL
,
10411 stree
->name
, true, NULL
);
10413 if (overridden
&& overridden
->n
.tb
)
10414 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
10417 stree
->n
.tb
->overridden
= NULL
;
10419 /* Resolve basically using worker function. */
10420 if (resolve_tb_generic_targets (super_type
, stree
->n
.tb
, stree
->name
)
10424 /* Check the targets to be functions of correct interface. */
10425 for (target
= stree
->n
.tb
->u
.generic
; target
; target
= target
->next
)
10427 gfc_symbol
* target_proc
;
10429 target_proc
= get_checked_tb_operator_target (target
, stree
->n
.tb
->where
);
10433 if (check_uop_procedure (target_proc
, stree
->n
.tb
->where
) == FAILURE
)
10440 resolve_bindings_result
= FAILURE
;
10441 stree
->n
.tb
->error
= 1;
10445 /* Resolve the type-bound procedures for a derived type. */
10448 resolve_typebound_procedure (gfc_symtree
* stree
)
10452 gfc_symbol
* me_arg
;
10453 gfc_symbol
* super_type
;
10454 gfc_component
* comp
;
10456 gcc_assert (stree
);
10458 /* Undefined specific symbol from GENERIC target definition. */
10462 if (stree
->n
.tb
->error
)
10465 /* If this is a GENERIC binding, use that routine. */
10466 if (stree
->n
.tb
->is_generic
)
10468 if (resolve_typebound_generic (resolve_bindings_derived
, stree
)
10474 /* Get the target-procedure to check it. */
10475 gcc_assert (!stree
->n
.tb
->is_generic
);
10476 gcc_assert (stree
->n
.tb
->u
.specific
);
10477 proc
= stree
->n
.tb
->u
.specific
->n
.sym
;
10478 where
= stree
->n
.tb
->where
;
10480 /* Default access should already be resolved from the parser. */
10481 gcc_assert (stree
->n
.tb
->access
!= ACCESS_UNKNOWN
);
10483 /* It should be a module procedure or an external procedure with explicit
10484 interface. For DEFERRED bindings, abstract interfaces are ok as well. */
10485 if ((!proc
->attr
.subroutine
&& !proc
->attr
.function
)
10486 || (proc
->attr
.proc
!= PROC_MODULE
10487 && proc
->attr
.if_source
!= IFSRC_IFBODY
)
10488 || (proc
->attr
.abstract
&& !stree
->n
.tb
->deferred
))
10490 gfc_error ("'%s' must be a module procedure or an external procedure with"
10491 " an explicit interface at %L", proc
->name
, &where
);
10494 stree
->n
.tb
->subroutine
= proc
->attr
.subroutine
;
10495 stree
->n
.tb
->function
= proc
->attr
.function
;
10497 /* Find the super-type of the current derived type. We could do this once and
10498 store in a global if speed is needed, but as long as not I believe this is
10499 more readable and clearer. */
10500 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
10502 /* If PASS, resolve and check arguments if not already resolved / loaded
10503 from a .mod file. */
10504 if (!stree
->n
.tb
->nopass
&& stree
->n
.tb
->pass_arg_num
== 0)
10506 if (stree
->n
.tb
->pass_arg
)
10508 gfc_formal_arglist
* i
;
10510 /* If an explicit passing argument name is given, walk the arg-list
10511 and look for it. */
10514 stree
->n
.tb
->pass_arg_num
= 1;
10515 for (i
= proc
->formal
; i
; i
= i
->next
)
10517 if (!strcmp (i
->sym
->name
, stree
->n
.tb
->pass_arg
))
10522 ++stree
->n
.tb
->pass_arg_num
;
10527 gfc_error ("Procedure '%s' with PASS(%s) at %L has no"
10529 proc
->name
, stree
->n
.tb
->pass_arg
, &where
,
10530 stree
->n
.tb
->pass_arg
);
10536 /* Otherwise, take the first one; there should in fact be at least
10538 stree
->n
.tb
->pass_arg_num
= 1;
10541 gfc_error ("Procedure '%s' with PASS at %L must have at"
10542 " least one argument", proc
->name
, &where
);
10545 me_arg
= proc
->formal
->sym
;
10548 /* Now check that the argument-type matches and the passed-object
10549 dummy argument is generally fine. */
10551 gcc_assert (me_arg
);
10553 if (me_arg
->ts
.type
!= BT_CLASS
)
10555 gfc_error ("Non-polymorphic passed-object dummy argument of '%s'"
10556 " at %L", proc
->name
, &where
);
10560 if (CLASS_DATA (me_arg
)->ts
.u
.derived
10561 != resolve_bindings_derived
)
10563 gfc_error ("Argument '%s' of '%s' with PASS(%s) at %L must be of"
10564 " the derived-type '%s'", me_arg
->name
, proc
->name
,
10565 me_arg
->name
, &where
, resolve_bindings_derived
->name
);
10569 gcc_assert (me_arg
->ts
.type
== BT_CLASS
);
10570 if (CLASS_DATA (me_arg
)->as
&& CLASS_DATA (me_arg
)->as
->rank
> 0)
10572 gfc_error ("Passed-object dummy argument of '%s' at %L must be"
10573 " scalar", proc
->name
, &where
);
10576 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
10578 gfc_error ("Passed-object dummy argument of '%s' at %L must not"
10579 " be ALLOCATABLE", proc
->name
, &where
);
10582 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
10584 gfc_error ("Passed-object dummy argument of '%s' at %L must not"
10585 " be POINTER", proc
->name
, &where
);
10590 /* If we are extending some type, check that we don't override a procedure
10591 flagged NON_OVERRIDABLE. */
10592 stree
->n
.tb
->overridden
= NULL
;
10595 gfc_symtree
* overridden
;
10596 overridden
= gfc_find_typebound_proc (super_type
, NULL
,
10597 stree
->name
, true, NULL
);
10599 if (overridden
&& overridden
->n
.tb
)
10600 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
10602 if (overridden
&& check_typebound_override (stree
, overridden
) == FAILURE
)
10606 /* See if there's a name collision with a component directly in this type. */
10607 for (comp
= resolve_bindings_derived
->components
; comp
; comp
= comp
->next
)
10608 if (!strcmp (comp
->name
, stree
->name
))
10610 gfc_error ("Procedure '%s' at %L has the same name as a component of"
10612 stree
->name
, &where
, resolve_bindings_derived
->name
);
10616 /* Try to find a name collision with an inherited component. */
10617 if (super_type
&& gfc_find_component (super_type
, stree
->name
, true, true))
10619 gfc_error ("Procedure '%s' at %L has the same name as an inherited"
10620 " component of '%s'",
10621 stree
->name
, &where
, resolve_bindings_derived
->name
);
10625 stree
->n
.tb
->error
= 0;
10629 resolve_bindings_result
= FAILURE
;
10630 stree
->n
.tb
->error
= 1;
10634 resolve_typebound_procedures (gfc_symbol
* derived
)
10638 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->tb_sym_root
)
10641 resolve_bindings_derived
= derived
;
10642 resolve_bindings_result
= SUCCESS
;
10644 if (derived
->f2k_derived
->tb_sym_root
)
10645 gfc_traverse_symtree (derived
->f2k_derived
->tb_sym_root
,
10646 &resolve_typebound_procedure
);
10648 if (derived
->f2k_derived
->tb_uop_root
)
10649 gfc_traverse_symtree (derived
->f2k_derived
->tb_uop_root
,
10650 &resolve_typebound_user_op
);
10652 for (op
= 0; op
!= GFC_INTRINSIC_OPS
; ++op
)
10654 gfc_typebound_proc
* p
= derived
->f2k_derived
->tb_op
[op
];
10655 if (p
&& resolve_typebound_intrinsic_op (derived
, (gfc_intrinsic_op
) op
,
10657 resolve_bindings_result
= FAILURE
;
10660 return resolve_bindings_result
;
10664 /* Add a derived type to the dt_list. The dt_list is used in trans-types.c
10665 to give all identical derived types the same backend_decl. */
10667 add_dt_to_dt_list (gfc_symbol
*derived
)
10669 gfc_dt_list
*dt_list
;
10671 for (dt_list
= gfc_derived_types
; dt_list
; dt_list
= dt_list
->next
)
10672 if (derived
== dt_list
->derived
)
10675 if (dt_list
== NULL
)
10677 dt_list
= gfc_get_dt_list ();
10678 dt_list
->next
= gfc_derived_types
;
10679 dt_list
->derived
= derived
;
10680 gfc_derived_types
= dt_list
;
10685 /* Ensure that a derived-type is really not abstract, meaning that every
10686 inherited DEFERRED binding is overridden by a non-DEFERRED one. */
10689 ensure_not_abstract_walker (gfc_symbol
* sub
, gfc_symtree
* st
)
10694 if (ensure_not_abstract_walker (sub
, st
->left
) == FAILURE
)
10696 if (ensure_not_abstract_walker (sub
, st
->right
) == FAILURE
)
10699 if (st
->n
.tb
&& st
->n
.tb
->deferred
)
10701 gfc_symtree
* overriding
;
10702 overriding
= gfc_find_typebound_proc (sub
, NULL
, st
->name
, true, NULL
);
10705 gcc_assert (overriding
->n
.tb
);
10706 if (overriding
->n
.tb
->deferred
)
10708 gfc_error ("Derived-type '%s' declared at %L must be ABSTRACT because"
10709 " '%s' is DEFERRED and not overridden",
10710 sub
->name
, &sub
->declared_at
, st
->name
);
10719 ensure_not_abstract (gfc_symbol
* sub
, gfc_symbol
* ancestor
)
10721 /* The algorithm used here is to recursively travel up the ancestry of sub
10722 and for each ancestor-type, check all bindings. If any of them is
10723 DEFERRED, look it up starting from sub and see if the found (overriding)
10724 binding is not DEFERRED.
10725 This is not the most efficient way to do this, but it should be ok and is
10726 clearer than something sophisticated. */
10728 gcc_assert (ancestor
&& !sub
->attr
.abstract
);
10730 if (!ancestor
->attr
.abstract
)
10733 /* Walk bindings of this ancestor. */
10734 if (ancestor
->f2k_derived
)
10737 t
= ensure_not_abstract_walker (sub
, ancestor
->f2k_derived
->tb_sym_root
);
10742 /* Find next ancestor type and recurse on it. */
10743 ancestor
= gfc_get_derived_super_type (ancestor
);
10745 return ensure_not_abstract (sub
, ancestor
);
10751 static void resolve_symbol (gfc_symbol
*sym
);
10754 /* Resolve the components of a derived type. */
10757 resolve_fl_derived (gfc_symbol
*sym
)
10759 gfc_symbol
* super_type
;
10763 super_type
= gfc_get_derived_super_type (sym
);
10765 if (sym
->attr
.is_class
&& sym
->ts
.u
.derived
== NULL
)
10767 /* Fix up incomplete CLASS symbols. */
10768 gfc_component
*data
= gfc_find_component (sym
, "$data", true, true);
10769 gfc_component
*vptr
= gfc_find_component (sym
, "$vptr", true, true);
10770 if (vptr
->ts
.u
.derived
== NULL
)
10772 gfc_symbol
*vtab
= gfc_find_derived_vtab (data
->ts
.u
.derived
, false);
10774 vptr
->ts
.u
.derived
= vtab
->ts
.u
.derived
;
10779 if (super_type
&& sym
->attr
.coarray_comp
&& !super_type
->attr
.coarray_comp
)
10781 gfc_error ("As extending type '%s' at %L has a coarray component, "
10782 "parent type '%s' shall also have one", sym
->name
,
10783 &sym
->declared_at
, super_type
->name
);
10787 /* Ensure the extended type gets resolved before we do. */
10788 if (super_type
&& resolve_fl_derived (super_type
) == FAILURE
)
10791 /* An ABSTRACT type must be extensible. */
10792 if (sym
->attr
.abstract
&& !gfc_type_is_extensible (sym
))
10794 gfc_error ("Non-extensible derived-type '%s' at %L must not be ABSTRACT",
10795 sym
->name
, &sym
->declared_at
);
10799 for (c
= sym
->components
; c
!= NULL
; c
= c
->next
)
10802 if (c
->attr
.codimension
/* FIXME: c->as check due to PR 43412. */
10803 && (!c
->attr
.allocatable
|| (c
->as
&& c
->as
->type
!= AS_DEFERRED
)))
10805 gfc_error ("Coarray component '%s' at %L must be allocatable with "
10806 "deferred shape", c
->name
, &c
->loc
);
10811 if (c
->attr
.codimension
&& c
->ts
.type
== BT_DERIVED
10812 && c
->ts
.u
.derived
->ts
.is_iso_c
)
10814 gfc_error ("Component '%s' at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
10815 "shall not be a coarray", c
->name
, &c
->loc
);
10820 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.coarray_comp
10821 && (c
->attr
.codimension
|| c
->attr
.pointer
|| c
->attr
.dimension
10822 || c
->attr
.allocatable
))
10824 gfc_error ("Component '%s' at %L with coarray component "
10825 "shall be a nonpointer, nonallocatable scalar",
10831 if (c
->attr
.contiguous
&& (!c
->attr
.dimension
|| !c
->attr
.pointer
))
10833 gfc_error ("Component '%s' at %L has the CONTIGUOUS attribute but "
10834 "is not an array pointer", c
->name
, &c
->loc
);
10838 if (c
->attr
.proc_pointer
&& c
->ts
.interface
)
10840 if (c
->ts
.interface
->attr
.procedure
&& !sym
->attr
.vtype
)
10841 gfc_error ("Interface '%s', used by procedure pointer component "
10842 "'%s' at %L, is declared in a later PROCEDURE statement",
10843 c
->ts
.interface
->name
, c
->name
, &c
->loc
);
10845 /* Get the attributes from the interface (now resolved). */
10846 if (c
->ts
.interface
->attr
.if_source
10847 || c
->ts
.interface
->attr
.intrinsic
)
10849 gfc_symbol
*ifc
= c
->ts
.interface
;
10851 if (ifc
->formal
&& !ifc
->formal_ns
)
10852 resolve_symbol (ifc
);
10854 if (ifc
->attr
.intrinsic
)
10855 resolve_intrinsic (ifc
, &ifc
->declared_at
);
10859 c
->ts
= ifc
->result
->ts
;
10860 c
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
10861 c
->attr
.pointer
= ifc
->result
->attr
.pointer
;
10862 c
->attr
.dimension
= ifc
->result
->attr
.dimension
;
10863 c
->as
= gfc_copy_array_spec (ifc
->result
->as
);
10868 c
->attr
.allocatable
= ifc
->attr
.allocatable
;
10869 c
->attr
.pointer
= ifc
->attr
.pointer
;
10870 c
->attr
.dimension
= ifc
->attr
.dimension
;
10871 c
->as
= gfc_copy_array_spec (ifc
->as
);
10873 c
->ts
.interface
= ifc
;
10874 c
->attr
.function
= ifc
->attr
.function
;
10875 c
->attr
.subroutine
= ifc
->attr
.subroutine
;
10876 gfc_copy_formal_args_ppc (c
, ifc
);
10878 c
->attr
.pure
= ifc
->attr
.pure
;
10879 c
->attr
.elemental
= ifc
->attr
.elemental
;
10880 c
->attr
.recursive
= ifc
->attr
.recursive
;
10881 c
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
10882 c
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
10883 /* Replace symbols in array spec. */
10887 for (i
= 0; i
< c
->as
->rank
; i
++)
10889 gfc_expr_replace_comp (c
->as
->lower
[i
], c
);
10890 gfc_expr_replace_comp (c
->as
->upper
[i
], c
);
10893 /* Copy char length. */
10894 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
10896 gfc_charlen
*cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
10897 gfc_expr_replace_comp (cl
->length
, c
);
10898 if (cl
->length
&& !cl
->resolved
10899 && gfc_resolve_expr (cl
->length
) == FAILURE
)
10904 else if (!sym
->attr
.vtype
&& c
->ts
.interface
->name
[0] != '\0')
10906 gfc_error ("Interface '%s' of procedure pointer component "
10907 "'%s' at %L must be explicit", c
->ts
.interface
->name
,
10912 else if (c
->attr
.proc_pointer
&& c
->ts
.type
== BT_UNKNOWN
)
10914 /* Since PPCs are not implicitly typed, a PPC without an explicit
10915 interface must be a subroutine. */
10916 gfc_add_subroutine (&c
->attr
, c
->name
, &c
->loc
);
10919 /* Procedure pointer components: Check PASS arg. */
10920 if (c
->attr
.proc_pointer
&& !c
->tb
->nopass
&& c
->tb
->pass_arg_num
== 0
10921 && !sym
->attr
.vtype
)
10923 gfc_symbol
* me_arg
;
10925 if (c
->tb
->pass_arg
)
10927 gfc_formal_arglist
* i
;
10929 /* If an explicit passing argument name is given, walk the arg-list
10930 and look for it. */
10933 c
->tb
->pass_arg_num
= 1;
10934 for (i
= c
->formal
; i
; i
= i
->next
)
10936 if (!strcmp (i
->sym
->name
, c
->tb
->pass_arg
))
10941 c
->tb
->pass_arg_num
++;
10946 gfc_error ("Procedure pointer component '%s' with PASS(%s) "
10947 "at %L has no argument '%s'", c
->name
,
10948 c
->tb
->pass_arg
, &c
->loc
, c
->tb
->pass_arg
);
10955 /* Otherwise, take the first one; there should in fact be at least
10957 c
->tb
->pass_arg_num
= 1;
10960 gfc_error ("Procedure pointer component '%s' with PASS at %L "
10961 "must have at least one argument",
10966 me_arg
= c
->formal
->sym
;
10969 /* Now check that the argument-type matches. */
10970 gcc_assert (me_arg
);
10971 if ((me_arg
->ts
.type
!= BT_DERIVED
&& me_arg
->ts
.type
!= BT_CLASS
)
10972 || (me_arg
->ts
.type
== BT_DERIVED
&& me_arg
->ts
.u
.derived
!= sym
)
10973 || (me_arg
->ts
.type
== BT_CLASS
10974 && CLASS_DATA (me_arg
)->ts
.u
.derived
!= sym
))
10976 gfc_error ("Argument '%s' of '%s' with PASS(%s) at %L must be of"
10977 " the derived type '%s'", me_arg
->name
, c
->name
,
10978 me_arg
->name
, &c
->loc
, sym
->name
);
10983 /* Check for C453. */
10984 if (me_arg
->attr
.dimension
)
10986 gfc_error ("Argument '%s' of '%s' with PASS(%s) at %L "
10987 "must be scalar", me_arg
->name
, c
->name
, me_arg
->name
,
10993 if (me_arg
->attr
.pointer
)
10995 gfc_error ("Argument '%s' of '%s' with PASS(%s) at %L "
10996 "may not have the POINTER attribute", me_arg
->name
,
10997 c
->name
, me_arg
->name
, &c
->loc
);
11002 if (me_arg
->attr
.allocatable
)
11004 gfc_error ("Argument '%s' of '%s' with PASS(%s) at %L "
11005 "may not be ALLOCATABLE", me_arg
->name
, c
->name
,
11006 me_arg
->name
, &c
->loc
);
11011 if (gfc_type_is_extensible (sym
) && me_arg
->ts
.type
!= BT_CLASS
)
11012 gfc_error ("Non-polymorphic passed-object dummy argument of '%s'"
11013 " at %L", c
->name
, &c
->loc
);
11017 /* Check type-spec if this is not the parent-type component. */
11018 if ((!sym
->attr
.extension
|| c
!= sym
->components
)
11019 && resolve_typespec_used (&c
->ts
, &c
->loc
, c
->name
) == FAILURE
)
11022 /* If this type is an extension, set the accessibility of the parent
11024 if (super_type
&& c
== sym
->components
11025 && strcmp (super_type
->name
, c
->name
) == 0)
11026 c
->attr
.access
= super_type
->attr
.access
;
11028 /* If this type is an extension, see if this component has the same name
11029 as an inherited type-bound procedure. */
11030 if (super_type
&& !sym
->attr
.is_class
11031 && gfc_find_typebound_proc (super_type
, NULL
, c
->name
, true, NULL
))
11033 gfc_error ("Component '%s' of '%s' at %L has the same name as an"
11034 " inherited type-bound procedure",
11035 c
->name
, sym
->name
, &c
->loc
);
11039 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.proc_pointer
)
11041 if (c
->ts
.u
.cl
->length
== NULL
11042 || (resolve_charlen (c
->ts
.u
.cl
) == FAILURE
)
11043 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
))
11045 gfc_error ("Character length of component '%s' needs to "
11046 "be a constant specification expression at %L",
11048 c
->ts
.u
.cl
->length
? &c
->ts
.u
.cl
->length
->where
: &c
->loc
);
11053 if (c
->ts
.type
== BT_DERIVED
11054 && sym
->component_access
!= ACCESS_PRIVATE
11055 && gfc_check_access (sym
->attr
.access
, sym
->ns
->default_access
)
11056 && !is_sym_host_assoc (c
->ts
.u
.derived
, sym
->ns
)
11057 && !c
->ts
.u
.derived
->attr
.use_assoc
11058 && !gfc_check_access (c
->ts
.u
.derived
->attr
.access
,
11059 c
->ts
.u
.derived
->ns
->default_access
)
11060 && gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: the component '%s' "
11061 "is a PRIVATE type and cannot be a component of "
11062 "'%s', which is PUBLIC at %L", c
->name
,
11063 sym
->name
, &sym
->declared_at
) == FAILURE
)
11066 if (sym
->attr
.sequence
)
11068 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.sequence
== 0)
11070 gfc_error ("Component %s of SEQUENCE type declared at %L does "
11071 "not have the SEQUENCE attribute",
11072 c
->ts
.u
.derived
->name
, &sym
->declared_at
);
11077 if (!sym
->attr
.is_class
&& c
->ts
.type
== BT_DERIVED
&& c
->attr
.pointer
11078 && c
->ts
.u
.derived
->components
== NULL
11079 && !c
->ts
.u
.derived
->attr
.zero_comp
)
11081 gfc_error ("The pointer component '%s' of '%s' at %L is a type "
11082 "that has not been declared", c
->name
, sym
->name
,
11087 if (c
->ts
.type
== BT_CLASS
&& CLASS_DATA (c
)->attr
.pointer
11088 && CLASS_DATA (c
)->ts
.u
.derived
->components
== NULL
11089 && !CLASS_DATA (c
)->ts
.u
.derived
->attr
.zero_comp
)
11091 gfc_error ("The pointer component '%s' of '%s' at %L is a type "
11092 "that has not been declared", c
->name
, sym
->name
,
11098 if (c
->ts
.type
== BT_CLASS
11099 && !(CLASS_DATA (c
)->attr
.pointer
|| CLASS_DATA (c
)->attr
.allocatable
))
11101 gfc_error ("Component '%s' with CLASS at %L must be allocatable "
11102 "or pointer", c
->name
, &c
->loc
);
11106 /* Ensure that all the derived type components are put on the
11107 derived type list; even in formal namespaces, where derived type
11108 pointer components might not have been declared. */
11109 if (c
->ts
.type
== BT_DERIVED
11111 && c
->ts
.u
.derived
->components
11113 && sym
!= c
->ts
.u
.derived
)
11114 add_dt_to_dt_list (c
->ts
.u
.derived
);
11116 if (c
->attr
.pointer
|| c
->attr
.proc_pointer
|| c
->attr
.allocatable
11120 for (i
= 0; i
< c
->as
->rank
; i
++)
11122 if (c
->as
->lower
[i
] == NULL
11123 || (resolve_index_expr (c
->as
->lower
[i
]) == FAILURE
)
11124 || !gfc_is_constant_expr (c
->as
->lower
[i
])
11125 || c
->as
->upper
[i
] == NULL
11126 || (resolve_index_expr (c
->as
->upper
[i
]) == FAILURE
)
11127 || !gfc_is_constant_expr (c
->as
->upper
[i
]))
11129 gfc_error ("Component '%s' of '%s' at %L must have "
11130 "constant array bounds",
11131 c
->name
, sym
->name
, &c
->loc
);
11137 /* Resolve the type-bound procedures. */
11138 if (resolve_typebound_procedures (sym
) == FAILURE
)
11141 /* Resolve the finalizer procedures. */
11142 if (gfc_resolve_finalizers (sym
) == FAILURE
)
11145 /* If this is a non-ABSTRACT type extending an ABSTRACT one, ensure that
11146 all DEFERRED bindings are overridden. */
11147 if (super_type
&& super_type
->attr
.abstract
&& !sym
->attr
.abstract
11148 && !sym
->attr
.is_class
11149 && ensure_not_abstract (sym
, super_type
) == FAILURE
)
11152 /* Add derived type to the derived type list. */
11153 add_dt_to_dt_list (sym
);
11160 resolve_fl_namelist (gfc_symbol
*sym
)
11165 /* Reject PRIVATE objects in a PUBLIC namelist. */
11166 if (gfc_check_access(sym
->attr
.access
, sym
->ns
->default_access
))
11168 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
11170 if (!nl
->sym
->attr
.use_assoc
11171 && !is_sym_host_assoc (nl
->sym
, sym
->ns
)
11172 && !gfc_check_access(nl
->sym
->attr
.access
,
11173 nl
->sym
->ns
->default_access
))
11175 gfc_error ("NAMELIST object '%s' was declared PRIVATE and "
11176 "cannot be member of PUBLIC namelist '%s' at %L",
11177 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
11181 /* Types with private components that came here by USE-association. */
11182 if (nl
->sym
->ts
.type
== BT_DERIVED
11183 && derived_inaccessible (nl
->sym
->ts
.u
.derived
))
11185 gfc_error ("NAMELIST object '%s' has use-associated PRIVATE "
11186 "components and cannot be member of namelist '%s' at %L",
11187 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
11191 /* Types with private components that are defined in the same module. */
11192 if (nl
->sym
->ts
.type
== BT_DERIVED
11193 && !is_sym_host_assoc (nl
->sym
->ts
.u
.derived
, sym
->ns
)
11194 && !gfc_check_access (nl
->sym
->ts
.u
.derived
->attr
.private_comp
11195 ? ACCESS_PRIVATE
: ACCESS_UNKNOWN
,
11196 nl
->sym
->ns
->default_access
))
11198 gfc_error ("NAMELIST object '%s' has PRIVATE components and "
11199 "cannot be a member of PUBLIC namelist '%s' at %L",
11200 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
11206 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
11208 /* Reject namelist arrays of assumed shape. */
11209 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SHAPE
11210 && gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object '%s' "
11211 "must not have assumed shape in namelist "
11212 "'%s' at %L", nl
->sym
->name
, sym
->name
,
11213 &sym
->declared_at
) == FAILURE
)
11216 /* Reject namelist arrays that are not constant shape. */
11217 if (is_non_constant_shape_array (nl
->sym
))
11219 gfc_error ("NAMELIST array object '%s' must have constant "
11220 "shape in namelist '%s' at %L", nl
->sym
->name
,
11221 sym
->name
, &sym
->declared_at
);
11225 /* Namelist objects cannot have allocatable or pointer components. */
11226 if (nl
->sym
->ts
.type
!= BT_DERIVED
)
11229 if (nl
->sym
->ts
.u
.derived
->attr
.alloc_comp
)
11231 gfc_error ("NAMELIST object '%s' in namelist '%s' at %L cannot "
11232 "have ALLOCATABLE components",
11233 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
11237 if (nl
->sym
->ts
.u
.derived
->attr
.pointer_comp
)
11239 gfc_error ("NAMELIST object '%s' in namelist '%s' at %L cannot "
11240 "have POINTER components",
11241 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
11247 /* 14.1.2 A module or internal procedure represent local entities
11248 of the same type as a namelist member and so are not allowed. */
11249 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
11251 if (nl
->sym
->ts
.kind
!= 0 && nl
->sym
->attr
.flavor
== FL_VARIABLE
)
11254 if (nl
->sym
->attr
.function
&& nl
->sym
== nl
->sym
->result
)
11255 if ((nl
->sym
== sym
->ns
->proc_name
)
11257 (sym
->ns
->parent
&& nl
->sym
== sym
->ns
->parent
->proc_name
))
11261 if (nl
->sym
&& nl
->sym
->name
)
11262 gfc_find_symbol (nl
->sym
->name
, sym
->ns
, 1, &nlsym
);
11263 if (nlsym
&& nlsym
->attr
.flavor
== FL_PROCEDURE
)
11265 gfc_error ("PROCEDURE attribute conflicts with NAMELIST "
11266 "attribute in '%s' at %L", nlsym
->name
,
11267 &sym
->declared_at
);
11277 resolve_fl_parameter (gfc_symbol
*sym
)
11279 /* A parameter array's shape needs to be constant. */
11280 if (sym
->as
!= NULL
11281 && (sym
->as
->type
== AS_DEFERRED
11282 || is_non_constant_shape_array (sym
)))
11284 gfc_error ("Parameter array '%s' at %L cannot be automatic "
11285 "or of deferred shape", sym
->name
, &sym
->declared_at
);
11289 /* Make sure a parameter that has been implicitly typed still
11290 matches the implicit type, since PARAMETER statements can precede
11291 IMPLICIT statements. */
11292 if (sym
->attr
.implicit_type
11293 && !gfc_compare_types (&sym
->ts
, gfc_get_default_type (sym
->name
,
11296 gfc_error ("Implicitly typed PARAMETER '%s' at %L doesn't match a "
11297 "later IMPLICIT type", sym
->name
, &sym
->declared_at
);
11301 /* Make sure the types of derived parameters are consistent. This
11302 type checking is deferred until resolution because the type may
11303 refer to a derived type from the host. */
11304 if (sym
->ts
.type
== BT_DERIVED
11305 && !gfc_compare_types (&sym
->ts
, &sym
->value
->ts
))
11307 gfc_error ("Incompatible derived type in PARAMETER at %L",
11308 &sym
->value
->where
);
11315 /* Do anything necessary to resolve a symbol. Right now, we just
11316 assume that an otherwise unknown symbol is a variable. This sort
11317 of thing commonly happens for symbols in module. */
11320 resolve_symbol (gfc_symbol
*sym
)
11322 int check_constant
, mp_flag
;
11323 gfc_symtree
*symtree
;
11324 gfc_symtree
*this_symtree
;
11328 /* Avoid double resolution of function result symbols. */
11329 if ((sym
->result
|| sym
->attr
.result
) && (sym
->ns
!= gfc_current_ns
))
11332 if (sym
->attr
.flavor
== FL_UNKNOWN
)
11335 /* If we find that a flavorless symbol is an interface in one of the
11336 parent namespaces, find its symtree in this namespace, free the
11337 symbol and set the symtree to point to the interface symbol. */
11338 for (ns
= gfc_current_ns
->parent
; ns
; ns
= ns
->parent
)
11340 symtree
= gfc_find_symtree (ns
->sym_root
, sym
->name
);
11341 if (symtree
&& symtree
->n
.sym
->generic
)
11343 this_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
11347 gfc_free_symbol (sym
);
11348 symtree
->n
.sym
->refs
++;
11349 this_symtree
->n
.sym
= symtree
->n
.sym
;
11354 /* Otherwise give it a flavor according to such attributes as
11356 if (sym
->attr
.external
== 0 && sym
->attr
.intrinsic
== 0)
11357 sym
->attr
.flavor
= FL_VARIABLE
;
11360 sym
->attr
.flavor
= FL_PROCEDURE
;
11361 if (sym
->attr
.dimension
)
11362 sym
->attr
.function
= 1;
11366 if (sym
->attr
.external
&& sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.function
)
11367 gfc_add_function (&sym
->attr
, sym
->name
, &sym
->declared_at
);
11369 if (sym
->attr
.procedure
&& sym
->ts
.interface
11370 && sym
->attr
.if_source
!= IFSRC_DECL
)
11372 if (sym
->ts
.interface
== sym
)
11374 gfc_error ("PROCEDURE '%s' at %L may not be used as its own "
11375 "interface", sym
->name
, &sym
->declared_at
);
11378 if (sym
->ts
.interface
->attr
.procedure
)
11380 gfc_error ("Interface '%s', used by procedure '%s' at %L, is declared"
11381 " in a later PROCEDURE statement", sym
->ts
.interface
->name
,
11382 sym
->name
,&sym
->declared_at
);
11386 /* Get the attributes from the interface (now resolved). */
11387 if (sym
->ts
.interface
->attr
.if_source
11388 || sym
->ts
.interface
->attr
.intrinsic
)
11390 gfc_symbol
*ifc
= sym
->ts
.interface
;
11391 resolve_symbol (ifc
);
11393 if (ifc
->attr
.intrinsic
)
11394 resolve_intrinsic (ifc
, &ifc
->declared_at
);
11397 sym
->ts
= ifc
->result
->ts
;
11400 sym
->ts
.interface
= ifc
;
11401 sym
->attr
.function
= ifc
->attr
.function
;
11402 sym
->attr
.subroutine
= ifc
->attr
.subroutine
;
11403 gfc_copy_formal_args (sym
, ifc
);
11405 sym
->attr
.allocatable
= ifc
->attr
.allocatable
;
11406 sym
->attr
.pointer
= ifc
->attr
.pointer
;
11407 sym
->attr
.pure
= ifc
->attr
.pure
;
11408 sym
->attr
.elemental
= ifc
->attr
.elemental
;
11409 sym
->attr
.dimension
= ifc
->attr
.dimension
;
11410 sym
->attr
.contiguous
= ifc
->attr
.contiguous
;
11411 sym
->attr
.recursive
= ifc
->attr
.recursive
;
11412 sym
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
11413 sym
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
11414 /* Copy array spec. */
11415 sym
->as
= gfc_copy_array_spec (ifc
->as
);
11419 for (i
= 0; i
< sym
->as
->rank
; i
++)
11421 gfc_expr_replace_symbols (sym
->as
->lower
[i
], sym
);
11422 gfc_expr_replace_symbols (sym
->as
->upper
[i
], sym
);
11425 /* Copy char length. */
11426 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
11428 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
11429 gfc_expr_replace_symbols (sym
->ts
.u
.cl
->length
, sym
);
11430 if (sym
->ts
.u
.cl
->length
&& !sym
->ts
.u
.cl
->resolved
11431 && gfc_resolve_expr (sym
->ts
.u
.cl
->length
) == FAILURE
)
11435 else if (sym
->ts
.interface
->name
[0] != '\0')
11437 gfc_error ("Interface '%s' of procedure '%s' at %L must be explicit",
11438 sym
->ts
.interface
->name
, sym
->name
, &sym
->declared_at
);
11443 if (sym
->attr
.is_protected
&& !sym
->attr
.proc_pointer
11444 && (sym
->attr
.procedure
|| sym
->attr
.external
))
11446 if (sym
->attr
.external
)
11447 gfc_error ("PROTECTED attribute conflicts with EXTERNAL attribute "
11448 "at %L", &sym
->declared_at
);
11450 gfc_error ("PROCEDURE attribute conflicts with PROTECTED attribute "
11451 "at %L", &sym
->declared_at
);
11458 if (sym
->attr
.contiguous
11459 && (!sym
->attr
.dimension
|| (sym
->as
->type
!= AS_ASSUMED_SHAPE
11460 && !sym
->attr
.pointer
)))
11462 gfc_error ("'%s' at %L has the CONTIGUOUS attribute but is not an "
11463 "array pointer or an assumed-shape array", sym
->name
,
11464 &sym
->declared_at
);
11468 if (sym
->attr
.flavor
== FL_DERIVED
&& resolve_fl_derived (sym
) == FAILURE
)
11471 /* Symbols that are module procedures with results (functions) have
11472 the types and array specification copied for type checking in
11473 procedures that call them, as well as for saving to a module
11474 file. These symbols can't stand the scrutiny that their results
11476 mp_flag
= (sym
->result
!= NULL
&& sym
->result
!= sym
);
11478 /* Make sure that the intrinsic is consistent with its internal
11479 representation. This needs to be done before assigning a default
11480 type to avoid spurious warnings. */
11481 if (sym
->attr
.flavor
!= FL_MODULE
&& sym
->attr
.intrinsic
11482 && resolve_intrinsic (sym
, &sym
->declared_at
) == FAILURE
)
11485 /* For associate names, resolve corresponding expression and make sure
11486 they get their type-spec set this way. */
11489 gcc_assert (sym
->attr
.flavor
== FL_VARIABLE
);
11490 if (gfc_resolve_expr (sym
->assoc
->target
) != SUCCESS
)
11493 sym
->ts
= sym
->assoc
->target
->ts
;
11494 gcc_assert (sym
->ts
.type
!= BT_UNKNOWN
);
11497 /* Assign default type to symbols that need one and don't have one. */
11498 if (sym
->ts
.type
== BT_UNKNOWN
)
11500 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
)
11501 gfc_set_default_type (sym
, 1, NULL
);
11503 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.external
11504 && !sym
->attr
.function
&& !sym
->attr
.subroutine
11505 && gfc_get_default_type (sym
->name
, sym
->ns
)->type
== BT_UNKNOWN
)
11506 gfc_add_subroutine (&sym
->attr
, sym
->name
, &sym
->declared_at
);
11508 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
11510 /* The specific case of an external procedure should emit an error
11511 in the case that there is no implicit type. */
11513 gfc_set_default_type (sym
, sym
->attr
.external
, NULL
);
11516 /* Result may be in another namespace. */
11517 resolve_symbol (sym
->result
);
11519 if (!sym
->result
->attr
.proc_pointer
)
11521 sym
->ts
= sym
->result
->ts
;
11522 sym
->as
= gfc_copy_array_spec (sym
->result
->as
);
11523 sym
->attr
.dimension
= sym
->result
->attr
.dimension
;
11524 sym
->attr
.pointer
= sym
->result
->attr
.pointer
;
11525 sym
->attr
.allocatable
= sym
->result
->attr
.allocatable
;
11526 sym
->attr
.contiguous
= sym
->result
->attr
.contiguous
;
11532 /* Assumed size arrays and assumed shape arrays must be dummy
11535 if (sym
->as
!= NULL
11536 && ((sym
->as
->type
== AS_ASSUMED_SIZE
&& !sym
->as
->cp_was_assumed
)
11537 || sym
->as
->type
== AS_ASSUMED_SHAPE
)
11538 && sym
->attr
.dummy
== 0)
11540 if (sym
->as
->type
== AS_ASSUMED_SIZE
)
11541 gfc_error ("Assumed size array at %L must be a dummy argument",
11542 &sym
->declared_at
);
11544 gfc_error ("Assumed shape array at %L must be a dummy argument",
11545 &sym
->declared_at
);
11549 /* Make sure symbols with known intent or optional are really dummy
11550 variable. Because of ENTRY statement, this has to be deferred
11551 until resolution time. */
11553 if (!sym
->attr
.dummy
11554 && (sym
->attr
.optional
|| sym
->attr
.intent
!= INTENT_UNKNOWN
))
11556 gfc_error ("Symbol at %L is not a DUMMY variable", &sym
->declared_at
);
11560 if (sym
->attr
.value
&& !sym
->attr
.dummy
)
11562 gfc_error ("'%s' at %L cannot have the VALUE attribute because "
11563 "it is not a dummy argument", sym
->name
, &sym
->declared_at
);
11567 if (sym
->attr
.value
&& sym
->ts
.type
== BT_CHARACTER
)
11569 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
11570 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
11572 gfc_error ("Character dummy variable '%s' at %L with VALUE "
11573 "attribute must have constant length",
11574 sym
->name
, &sym
->declared_at
);
11578 if (sym
->ts
.is_c_interop
11579 && mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
11581 gfc_error ("C interoperable character dummy variable '%s' at %L "
11582 "with VALUE attribute must have length one",
11583 sym
->name
, &sym
->declared_at
);
11588 /* If the symbol is marked as bind(c), verify it's type and kind. Do not
11589 do this for something that was implicitly typed because that is handled
11590 in gfc_set_default_type. Handle dummy arguments and procedure
11591 definitions separately. Also, anything that is use associated is not
11592 handled here but instead is handled in the module it is declared in.
11593 Finally, derived type definitions are allowed to be BIND(C) since that
11594 only implies that they're interoperable, and they are checked fully for
11595 interoperability when a variable is declared of that type. */
11596 if (sym
->attr
.is_bind_c
&& sym
->attr
.implicit_type
== 0 &&
11597 sym
->attr
.use_assoc
== 0 && sym
->attr
.dummy
== 0 &&
11598 sym
->attr
.flavor
!= FL_PROCEDURE
&& sym
->attr
.flavor
!= FL_DERIVED
)
11600 gfc_try t
= SUCCESS
;
11602 /* First, make sure the variable is declared at the
11603 module-level scope (J3/04-007, Section 15.3). */
11604 if (sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
&&
11605 sym
->attr
.in_common
== 0)
11607 gfc_error ("Variable '%s' at %L cannot be BIND(C) because it "
11608 "is neither a COMMON block nor declared at the "
11609 "module level scope", sym
->name
, &(sym
->declared_at
));
11612 else if (sym
->common_head
!= NULL
)
11614 t
= verify_com_block_vars_c_interop (sym
->common_head
);
11618 /* If type() declaration, we need to verify that the components
11619 of the given type are all C interoperable, etc. */
11620 if (sym
->ts
.type
== BT_DERIVED
&&
11621 sym
->ts
.u
.derived
->attr
.is_c_interop
!= 1)
11623 /* Make sure the user marked the derived type as BIND(C). If
11624 not, call the verify routine. This could print an error
11625 for the derived type more than once if multiple variables
11626 of that type are declared. */
11627 if (sym
->ts
.u
.derived
->attr
.is_bind_c
!= 1)
11628 verify_bind_c_derived_type (sym
->ts
.u
.derived
);
11632 /* Verify the variable itself as C interoperable if it
11633 is BIND(C). It is not possible for this to succeed if
11634 the verify_bind_c_derived_type failed, so don't have to handle
11635 any error returned by verify_bind_c_derived_type. */
11636 t
= verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
11637 sym
->common_block
);
11642 /* clear the is_bind_c flag to prevent reporting errors more than
11643 once if something failed. */
11644 sym
->attr
.is_bind_c
= 0;
11649 /* If a derived type symbol has reached this point, without its
11650 type being declared, we have an error. Notice that most
11651 conditions that produce undefined derived types have already
11652 been dealt with. However, the likes of:
11653 implicit type(t) (t) ..... call foo (t) will get us here if
11654 the type is not declared in the scope of the implicit
11655 statement. Change the type to BT_UNKNOWN, both because it is so
11656 and to prevent an ICE. */
11657 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->components
== NULL
11658 && !sym
->ts
.u
.derived
->attr
.zero_comp
)
11660 gfc_error ("The derived type '%s' at %L is of type '%s', "
11661 "which has not been defined", sym
->name
,
11662 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
11663 sym
->ts
.type
= BT_UNKNOWN
;
11667 /* Make sure that the derived type has been resolved and that the
11668 derived type is visible in the symbol's namespace, if it is a
11669 module function and is not PRIVATE. */
11670 if (sym
->ts
.type
== BT_DERIVED
11671 && sym
->ts
.u
.derived
->attr
.use_assoc
11672 && sym
->ns
->proc_name
11673 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
11677 if (resolve_fl_derived (sym
->ts
.u
.derived
) == FAILURE
)
11680 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 1, &ds
);
11681 if (!ds
&& sym
->attr
.function
11682 && gfc_check_access (sym
->attr
.access
, sym
->ns
->default_access
))
11684 symtree
= gfc_new_symtree (&sym
->ns
->sym_root
,
11685 sym
->ts
.u
.derived
->name
);
11686 symtree
->n
.sym
= sym
->ts
.u
.derived
;
11687 sym
->ts
.u
.derived
->refs
++;
11691 /* Unless the derived-type declaration is use associated, Fortran 95
11692 does not allow public entries of private derived types.
11693 See 4.4.1 (F95) and 4.5.1.1 (F2003); and related interpretation
11694 161 in 95-006r3. */
11695 if (sym
->ts
.type
== BT_DERIVED
11696 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
11697 && !sym
->ts
.u
.derived
->attr
.use_assoc
11698 && gfc_check_access (sym
->attr
.access
, sym
->ns
->default_access
)
11699 && !gfc_check_access (sym
->ts
.u
.derived
->attr
.access
,
11700 sym
->ts
.u
.derived
->ns
->default_access
)
11701 && gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: PUBLIC %s '%s' at %L "
11702 "of PRIVATE derived type '%s'",
11703 (sym
->attr
.flavor
== FL_PARAMETER
) ? "parameter"
11704 : "variable", sym
->name
, &sym
->declared_at
,
11705 sym
->ts
.u
.derived
->name
) == FAILURE
)
11708 /* An assumed-size array with INTENT(OUT) shall not be of a type for which
11709 default initialization is defined (5.1.2.4.4). */
11710 if (sym
->ts
.type
== BT_DERIVED
11712 && sym
->attr
.intent
== INTENT_OUT
11714 && sym
->as
->type
== AS_ASSUMED_SIZE
)
11716 for (c
= sym
->ts
.u
.derived
->components
; c
; c
= c
->next
)
11718 if (c
->initializer
)
11720 gfc_error ("The INTENT(OUT) dummy argument '%s' at %L is "
11721 "ASSUMED SIZE and so cannot have a default initializer",
11722 sym
->name
, &sym
->declared_at
);
11729 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
11730 || sym
->attr
.codimension
)
11731 && sym
->attr
.result
)
11732 gfc_error ("Function result '%s' at %L shall not be a coarray or have "
11733 "a coarray component", sym
->name
, &sym
->declared_at
);
11736 if (sym
->attr
.codimension
&& sym
->ts
.type
== BT_DERIVED
11737 && sym
->ts
.u
.derived
->ts
.is_iso_c
)
11738 gfc_error ("Variable '%s' at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
11739 "shall not be a coarray", sym
->name
, &sym
->declared_at
);
11742 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
11743 && (sym
->attr
.codimension
|| sym
->attr
.pointer
|| sym
->attr
.dimension
11744 || sym
->attr
.allocatable
))
11745 gfc_error ("Variable '%s' at %L with coarray component "
11746 "shall be a nonpointer, nonallocatable scalar",
11747 sym
->name
, &sym
->declared_at
);
11749 /* F2008, C526. The function-result case was handled above. */
11750 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
11751 || sym
->attr
.codimension
)
11752 && !(sym
->attr
.allocatable
|| sym
->attr
.dummy
|| sym
->attr
.save
11753 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
11754 || sym
->ns
->proc_name
->attr
.is_main_program
11755 || sym
->attr
.function
|| sym
->attr
.result
|| sym
->attr
.use_assoc
))
11756 gfc_error ("Variable '%s' at %L is a coarray or has a coarray "
11757 "component and is not ALLOCATABLE, SAVE nor a "
11758 "dummy argument", sym
->name
, &sym
->declared_at
);
11759 /* F2008, C528. */ /* FIXME: sym->as check due to PR 43412. */
11760 else if (sym
->attr
.codimension
&& !sym
->attr
.allocatable
11761 && sym
->as
&& sym
->as
->cotype
== AS_DEFERRED
)
11762 gfc_error ("Coarray variable '%s' at %L shall not have codimensions with "
11763 "deferred shape", sym
->name
, &sym
->declared_at
);
11764 else if (sym
->attr
.codimension
&& sym
->attr
.allocatable
11765 && (sym
->as
->type
!= AS_DEFERRED
|| sym
->as
->cotype
!= AS_DEFERRED
))
11766 gfc_error ("Allocatable coarray variable '%s' at %L must have "
11767 "deferred shape", sym
->name
, &sym
->declared_at
);
11771 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
11772 || (sym
->attr
.codimension
&& sym
->attr
.allocatable
))
11773 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
)
11774 gfc_error ("Variable '%s' at %L is INTENT(OUT) and can thus not be an "
11775 "allocatable coarray or have coarray components",
11776 sym
->name
, &sym
->declared_at
);
11778 if (sym
->attr
.codimension
&& sym
->attr
.dummy
11779 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.is_bind_c
)
11780 gfc_error ("Coarray dummy variable '%s' at %L not allowed in BIND(C) "
11781 "procedure '%s'", sym
->name
, &sym
->declared_at
,
11782 sym
->ns
->proc_name
->name
);
11784 switch (sym
->attr
.flavor
)
11787 if (resolve_fl_variable (sym
, mp_flag
) == FAILURE
)
11792 if (resolve_fl_procedure (sym
, mp_flag
) == FAILURE
)
11797 if (resolve_fl_namelist (sym
) == FAILURE
)
11802 if (resolve_fl_parameter (sym
) == FAILURE
)
11810 /* Resolve array specifier. Check as well some constraints
11811 on COMMON blocks. */
11813 check_constant
= sym
->attr
.in_common
&& !sym
->attr
.pointer
;
11815 /* Set the formal_arg_flag so that check_conflict will not throw
11816 an error for host associated variables in the specification
11817 expression for an array_valued function. */
11818 if (sym
->attr
.function
&& sym
->as
)
11819 formal_arg_flag
= 1;
11821 gfc_resolve_array_spec (sym
->as
, check_constant
);
11823 formal_arg_flag
= 0;
11825 /* Resolve formal namespaces. */
11826 if (sym
->formal_ns
&& sym
->formal_ns
!= gfc_current_ns
11827 && !sym
->attr
.contained
&& !sym
->attr
.intrinsic
)
11828 gfc_resolve (sym
->formal_ns
);
11830 /* Make sure the formal namespace is present. */
11831 if (sym
->formal
&& !sym
->formal_ns
)
11833 gfc_formal_arglist
*formal
= sym
->formal
;
11834 while (formal
&& !formal
->sym
)
11835 formal
= formal
->next
;
11839 sym
->formal_ns
= formal
->sym
->ns
;
11840 sym
->formal_ns
->refs
++;
11844 /* Check threadprivate restrictions. */
11845 if (sym
->attr
.threadprivate
&& !sym
->attr
.save
&& !sym
->ns
->save_all
11846 && (!sym
->attr
.in_common
11847 && sym
->module
== NULL
11848 && (sym
->ns
->proc_name
== NULL
11849 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
11850 gfc_error ("Threadprivate at %L isn't SAVEd", &sym
->declared_at
);
11852 /* If we have come this far we can apply default-initializers, as
11853 described in 14.7.5, to those variables that have not already
11854 been assigned one. */
11855 if (sym
->ts
.type
== BT_DERIVED
11856 && sym
->attr
.referenced
11857 && sym
->ns
== gfc_current_ns
11859 && !sym
->attr
.allocatable
11860 && !sym
->attr
.alloc_comp
)
11862 symbol_attribute
*a
= &sym
->attr
;
11864 if ((!a
->save
&& !a
->dummy
&& !a
->pointer
11865 && !a
->in_common
&& !a
->use_assoc
11866 && !(a
->function
&& sym
!= sym
->result
))
11867 || (a
->dummy
&& a
->intent
== INTENT_OUT
&& !a
->pointer
))
11868 apply_default_init (sym
);
11871 /* If this symbol has a type-spec, check it. */
11872 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
11873 || (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
))
11874 if (resolve_typespec_used (&sym
->ts
, &sym
->declared_at
, sym
->name
)
11880 /************* Resolve DATA statements *************/
11884 gfc_data_value
*vnode
;
11890 /* Advance the values structure to point to the next value in the data list. */
11893 next_data_value (void)
11895 while (mpz_cmp_ui (values
.left
, 0) == 0)
11898 if (values
.vnode
->next
== NULL
)
11901 values
.vnode
= values
.vnode
->next
;
11902 mpz_set (values
.left
, values
.vnode
->repeat
);
11910 check_data_variable (gfc_data_variable
*var
, locus
*where
)
11916 ar_type mark
= AR_UNKNOWN
;
11918 mpz_t section_index
[GFC_MAX_DIMENSIONS
];
11924 if (gfc_resolve_expr (var
->expr
) == FAILURE
)
11928 mpz_init_set_si (offset
, 0);
11931 if (e
->expr_type
!= EXPR_VARIABLE
)
11932 gfc_internal_error ("check_data_variable(): Bad expression");
11934 sym
= e
->symtree
->n
.sym
;
11936 if (sym
->ns
->is_block_data
&& !sym
->attr
.in_common
)
11938 gfc_error ("BLOCK DATA element '%s' at %L must be in COMMON",
11939 sym
->name
, &sym
->declared_at
);
11942 if (e
->ref
== NULL
&& sym
->as
)
11944 gfc_error ("DATA array '%s' at %L must be specified in a previous"
11945 " declaration", sym
->name
, where
);
11949 has_pointer
= sym
->attr
.pointer
;
11951 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
11953 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.pointer
)
11956 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
)
11958 gfc_error ("DATA element '%s' at %L cannot have a coindex",
11964 && ref
->type
== REF_ARRAY
11965 && ref
->u
.ar
.type
!= AR_FULL
)
11967 gfc_error ("DATA element '%s' at %L is a pointer and so must "
11968 "be a full array", sym
->name
, where
);
11973 if (e
->rank
== 0 || has_pointer
)
11975 mpz_init_set_ui (size
, 1);
11982 /* Find the array section reference. */
11983 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
11985 if (ref
->type
!= REF_ARRAY
)
11987 if (ref
->u
.ar
.type
== AR_ELEMENT
)
11993 /* Set marks according to the reference pattern. */
11994 switch (ref
->u
.ar
.type
)
12002 /* Get the start position of array section. */
12003 gfc_get_section_index (ar
, section_index
, &offset
);
12008 gcc_unreachable ();
12011 if (gfc_array_size (e
, &size
) == FAILURE
)
12013 gfc_error ("Nonconstant array section at %L in DATA statement",
12015 mpz_clear (offset
);
12022 while (mpz_cmp_ui (size
, 0) > 0)
12024 if (next_data_value () == FAILURE
)
12026 gfc_error ("DATA statement at %L has more variables than values",
12032 t
= gfc_check_assign (var
->expr
, values
.vnode
->expr
, 0);
12036 /* If we have more than one element left in the repeat count,
12037 and we have more than one element left in the target variable,
12038 then create a range assignment. */
12039 /* FIXME: Only done for full arrays for now, since array sections
12041 if (mark
== AR_FULL
&& ref
&& ref
->next
== NULL
12042 && mpz_cmp_ui (values
.left
, 1) > 0 && mpz_cmp_ui (size
, 1) > 0)
12046 if (mpz_cmp (size
, values
.left
) >= 0)
12048 mpz_init_set (range
, values
.left
);
12049 mpz_sub (size
, size
, values
.left
);
12050 mpz_set_ui (values
.left
, 0);
12054 mpz_init_set (range
, size
);
12055 mpz_sub (values
.left
, values
.left
, size
);
12056 mpz_set_ui (size
, 0);
12059 t
= gfc_assign_data_value_range (var
->expr
, values
.vnode
->expr
,
12062 mpz_add (offset
, offset
, range
);
12069 /* Assign initial value to symbol. */
12072 mpz_sub_ui (values
.left
, values
.left
, 1);
12073 mpz_sub_ui (size
, size
, 1);
12075 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
, offset
);
12079 if (mark
== AR_FULL
)
12080 mpz_add_ui (offset
, offset
, 1);
12082 /* Modify the array section indexes and recalculate the offset
12083 for next element. */
12084 else if (mark
== AR_SECTION
)
12085 gfc_advance_section (section_index
, ar
, &offset
);
12089 if (mark
== AR_SECTION
)
12091 for (i
= 0; i
< ar
->dimen
; i
++)
12092 mpz_clear (section_index
[i
]);
12096 mpz_clear (offset
);
12102 static gfc_try
traverse_data_var (gfc_data_variable
*, locus
*);
12104 /* Iterate over a list of elements in a DATA statement. */
12107 traverse_data_list (gfc_data_variable
*var
, locus
*where
)
12110 iterator_stack frame
;
12111 gfc_expr
*e
, *start
, *end
, *step
;
12112 gfc_try retval
= SUCCESS
;
12114 mpz_init (frame
.value
);
12117 start
= gfc_copy_expr (var
->iter
.start
);
12118 end
= gfc_copy_expr (var
->iter
.end
);
12119 step
= gfc_copy_expr (var
->iter
.step
);
12121 if (gfc_simplify_expr (start
, 1) == FAILURE
12122 || start
->expr_type
!= EXPR_CONSTANT
)
12124 gfc_error ("start of implied-do loop at %L could not be "
12125 "simplified to a constant value", &start
->where
);
12129 if (gfc_simplify_expr (end
, 1) == FAILURE
12130 || end
->expr_type
!= EXPR_CONSTANT
)
12132 gfc_error ("end of implied-do loop at %L could not be "
12133 "simplified to a constant value", &start
->where
);
12137 if (gfc_simplify_expr (step
, 1) == FAILURE
12138 || step
->expr_type
!= EXPR_CONSTANT
)
12140 gfc_error ("step of implied-do loop at %L could not be "
12141 "simplified to a constant value", &start
->where
);
12146 mpz_set (trip
, end
->value
.integer
);
12147 mpz_sub (trip
, trip
, start
->value
.integer
);
12148 mpz_add (trip
, trip
, step
->value
.integer
);
12150 mpz_div (trip
, trip
, step
->value
.integer
);
12152 mpz_set (frame
.value
, start
->value
.integer
);
12154 frame
.prev
= iter_stack
;
12155 frame
.variable
= var
->iter
.var
->symtree
;
12156 iter_stack
= &frame
;
12158 while (mpz_cmp_ui (trip
, 0) > 0)
12160 if (traverse_data_var (var
->list
, where
) == FAILURE
)
12166 e
= gfc_copy_expr (var
->expr
);
12167 if (gfc_simplify_expr (e
, 1) == FAILURE
)
12174 mpz_add (frame
.value
, frame
.value
, step
->value
.integer
);
12176 mpz_sub_ui (trip
, trip
, 1);
12180 mpz_clear (frame
.value
);
12183 gfc_free_expr (start
);
12184 gfc_free_expr (end
);
12185 gfc_free_expr (step
);
12187 iter_stack
= frame
.prev
;
12192 /* Type resolve variables in the variable list of a DATA statement. */
12195 traverse_data_var (gfc_data_variable
*var
, locus
*where
)
12199 for (; var
; var
= var
->next
)
12201 if (var
->expr
== NULL
)
12202 t
= traverse_data_list (var
, where
);
12204 t
= check_data_variable (var
, where
);
12214 /* Resolve the expressions and iterators associated with a data statement.
12215 This is separate from the assignment checking because data lists should
12216 only be resolved once. */
12219 resolve_data_variables (gfc_data_variable
*d
)
12221 for (; d
; d
= d
->next
)
12223 if (d
->list
== NULL
)
12225 if (gfc_resolve_expr (d
->expr
) == FAILURE
)
12230 if (gfc_resolve_iterator (&d
->iter
, false) == FAILURE
)
12233 if (resolve_data_variables (d
->list
) == FAILURE
)
12242 /* Resolve a single DATA statement. We implement this by storing a pointer to
12243 the value list into static variables, and then recursively traversing the
12244 variables list, expanding iterators and such. */
12247 resolve_data (gfc_data
*d
)
12250 if (resolve_data_variables (d
->var
) == FAILURE
)
12253 values
.vnode
= d
->value
;
12254 if (d
->value
== NULL
)
12255 mpz_set_ui (values
.left
, 0);
12257 mpz_set (values
.left
, d
->value
->repeat
);
12259 if (traverse_data_var (d
->var
, &d
->where
) == FAILURE
)
12262 /* At this point, we better not have any values left. */
12264 if (next_data_value () == SUCCESS
)
12265 gfc_error ("DATA statement at %L has more values than variables",
12270 /* 12.6 Constraint: In a pure subprogram any variable which is in common or
12271 accessed by host or use association, is a dummy argument to a pure function,
12272 is a dummy argument with INTENT (IN) to a pure subroutine, or an object that
12273 is storage associated with any such variable, shall not be used in the
12274 following contexts: (clients of this function). */
12276 /* Determines if a variable is not 'pure', i.e., not assignable within a pure
12277 procedure. Returns zero if assignment is OK, nonzero if there is a
12280 gfc_impure_variable (gfc_symbol
*sym
)
12285 if (sym
->attr
.use_assoc
|| sym
->attr
.in_common
)
12288 /* Check if the symbol's ns is inside the pure procedure. */
12289 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
12293 if (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.function
)
12297 proc
= sym
->ns
->proc_name
;
12298 if (sym
->attr
.dummy
&& gfc_pure (proc
)
12299 && ((proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_IN
)
12301 proc
->attr
.function
))
12304 /* TODO: Sort out what can be storage associated, if anything, and include
12305 it here. In principle equivalences should be scanned but it does not
12306 seem to be possible to storage associate an impure variable this way. */
12311 /* Test whether a symbol is pure or not. For a NULL pointer, checks if the
12312 current namespace is inside a pure procedure. */
12315 gfc_pure (gfc_symbol
*sym
)
12317 symbol_attribute attr
;
12322 /* Check if the current namespace or one of its parents
12323 belongs to a pure procedure. */
12324 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
12326 sym
= ns
->proc_name
;
12330 if (attr
.flavor
== FL_PROCEDURE
&& (attr
.pure
|| attr
.elemental
))
12338 return attr
.flavor
== FL_PROCEDURE
&& (attr
.pure
|| attr
.elemental
);
12342 /* Test whether the current procedure is elemental or not. */
12345 gfc_elemental (gfc_symbol
*sym
)
12347 symbol_attribute attr
;
12350 sym
= gfc_current_ns
->proc_name
;
12355 return attr
.flavor
== FL_PROCEDURE
&& attr
.elemental
;
12359 /* Warn about unused labels. */
12362 warn_unused_fortran_label (gfc_st_label
*label
)
12367 warn_unused_fortran_label (label
->left
);
12369 if (label
->defined
== ST_LABEL_UNKNOWN
)
12372 switch (label
->referenced
)
12374 case ST_LABEL_UNKNOWN
:
12375 gfc_warning ("Label %d at %L defined but not used", label
->value
,
12379 case ST_LABEL_BAD_TARGET
:
12380 gfc_warning ("Label %d at %L defined but cannot be used",
12381 label
->value
, &label
->where
);
12388 warn_unused_fortran_label (label
->right
);
12392 /* Returns the sequence type of a symbol or sequence. */
12395 sequence_type (gfc_typespec ts
)
12404 if (ts
.u
.derived
->components
== NULL
)
12405 return SEQ_NONDEFAULT
;
12407 result
= sequence_type (ts
.u
.derived
->components
->ts
);
12408 for (c
= ts
.u
.derived
->components
->next
; c
; c
= c
->next
)
12409 if (sequence_type (c
->ts
) != result
)
12415 if (ts
.kind
!= gfc_default_character_kind
)
12416 return SEQ_NONDEFAULT
;
12418 return SEQ_CHARACTER
;
12421 if (ts
.kind
!= gfc_default_integer_kind
)
12422 return SEQ_NONDEFAULT
;
12424 return SEQ_NUMERIC
;
12427 if (!(ts
.kind
== gfc_default_real_kind
12428 || ts
.kind
== gfc_default_double_kind
))
12429 return SEQ_NONDEFAULT
;
12431 return SEQ_NUMERIC
;
12434 if (ts
.kind
!= gfc_default_complex_kind
)
12435 return SEQ_NONDEFAULT
;
12437 return SEQ_NUMERIC
;
12440 if (ts
.kind
!= gfc_default_logical_kind
)
12441 return SEQ_NONDEFAULT
;
12443 return SEQ_NUMERIC
;
12446 return SEQ_NONDEFAULT
;
12451 /* Resolve derived type EQUIVALENCE object. */
12454 resolve_equivalence_derived (gfc_symbol
*derived
, gfc_symbol
*sym
, gfc_expr
*e
)
12456 gfc_component
*c
= derived
->components
;
12461 /* Shall not be an object of nonsequence derived type. */
12462 if (!derived
->attr
.sequence
)
12464 gfc_error ("Derived type variable '%s' at %L must have SEQUENCE "
12465 "attribute to be an EQUIVALENCE object", sym
->name
,
12470 /* Shall not have allocatable components. */
12471 if (derived
->attr
.alloc_comp
)
12473 gfc_error ("Derived type variable '%s' at %L cannot have ALLOCATABLE "
12474 "components to be an EQUIVALENCE object",sym
->name
,
12479 if (sym
->attr
.in_common
&& gfc_has_default_initializer (sym
->ts
.u
.derived
))
12481 gfc_error ("Derived type variable '%s' at %L with default "
12482 "initialization cannot be in EQUIVALENCE with a variable "
12483 "in COMMON", sym
->name
, &e
->where
);
12487 for (; c
; c
= c
->next
)
12489 if (c
->ts
.type
== BT_DERIVED
12490 && (resolve_equivalence_derived (c
->ts
.u
.derived
, sym
, e
) == FAILURE
))
12493 /* Shall not be an object of sequence derived type containing a pointer
12494 in the structure. */
12495 if (c
->attr
.pointer
)
12497 gfc_error ("Derived type variable '%s' at %L with pointer "
12498 "component(s) cannot be an EQUIVALENCE object",
12499 sym
->name
, &e
->where
);
12507 /* Resolve equivalence object.
12508 An EQUIVALENCE object shall not be a dummy argument, a pointer, a target,
12509 an allocatable array, an object of nonsequence derived type, an object of
12510 sequence derived type containing a pointer at any level of component
12511 selection, an automatic object, a function name, an entry name, a result
12512 name, a named constant, a structure component, or a subobject of any of
12513 the preceding objects. A substring shall not have length zero. A
12514 derived type shall not have components with default initialization nor
12515 shall two objects of an equivalence group be initialized.
12516 Either all or none of the objects shall have an protected attribute.
12517 The simple constraints are done in symbol.c(check_conflict) and the rest
12518 are implemented here. */
12521 resolve_equivalence (gfc_equiv
*eq
)
12524 gfc_symbol
*first_sym
;
12527 locus
*last_where
= NULL
;
12528 seq_type eq_type
, last_eq_type
;
12529 gfc_typespec
*last_ts
;
12530 int object
, cnt_protected
;
12533 last_ts
= &eq
->expr
->symtree
->n
.sym
->ts
;
12535 first_sym
= eq
->expr
->symtree
->n
.sym
;
12539 for (object
= 1; eq
; eq
= eq
->eq
, object
++)
12543 e
->ts
= e
->symtree
->n
.sym
->ts
;
12544 /* match_varspec might not know yet if it is seeing
12545 array reference or substring reference, as it doesn't
12547 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
)
12549 gfc_ref
*ref
= e
->ref
;
12550 sym
= e
->symtree
->n
.sym
;
12552 if (sym
->attr
.dimension
)
12554 ref
->u
.ar
.as
= sym
->as
;
12558 /* For substrings, convert REF_ARRAY into REF_SUBSTRING. */
12559 if (e
->ts
.type
== BT_CHARACTER
12561 && ref
->type
== REF_ARRAY
12562 && ref
->u
.ar
.dimen
== 1
12563 && ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
12564 && ref
->u
.ar
.stride
[0] == NULL
)
12566 gfc_expr
*start
= ref
->u
.ar
.start
[0];
12567 gfc_expr
*end
= ref
->u
.ar
.end
[0];
12570 /* Optimize away the (:) reference. */
12571 if (start
== NULL
&& end
== NULL
)
12574 e
->ref
= ref
->next
;
12576 e
->ref
->next
= ref
->next
;
12581 ref
->type
= REF_SUBSTRING
;
12583 start
= gfc_get_int_expr (gfc_default_integer_kind
,
12585 ref
->u
.ss
.start
= start
;
12586 if (end
== NULL
&& e
->ts
.u
.cl
)
12587 end
= gfc_copy_expr (e
->ts
.u
.cl
->length
);
12588 ref
->u
.ss
.end
= end
;
12589 ref
->u
.ss
.length
= e
->ts
.u
.cl
;
12596 /* Any further ref is an error. */
12599 gcc_assert (ref
->type
== REF_ARRAY
);
12600 gfc_error ("Syntax error in EQUIVALENCE statement at %L",
12606 if (gfc_resolve_expr (e
) == FAILURE
)
12609 sym
= e
->symtree
->n
.sym
;
12611 if (sym
->attr
.is_protected
)
12613 if (cnt_protected
> 0 && cnt_protected
!= object
)
12615 gfc_error ("Either all or none of the objects in the "
12616 "EQUIVALENCE set at %L shall have the "
12617 "PROTECTED attribute",
12622 /* Shall not equivalence common block variables in a PURE procedure. */
12623 if (sym
->ns
->proc_name
12624 && sym
->ns
->proc_name
->attr
.pure
12625 && sym
->attr
.in_common
)
12627 gfc_error ("Common block member '%s' at %L cannot be an EQUIVALENCE "
12628 "object in the pure procedure '%s'",
12629 sym
->name
, &e
->where
, sym
->ns
->proc_name
->name
);
12633 /* Shall not be a named constant. */
12634 if (e
->expr_type
== EXPR_CONSTANT
)
12636 gfc_error ("Named constant '%s' at %L cannot be an EQUIVALENCE "
12637 "object", sym
->name
, &e
->where
);
12641 if (e
->ts
.type
== BT_DERIVED
12642 && resolve_equivalence_derived (e
->ts
.u
.derived
, sym
, e
) == FAILURE
)
12645 /* Check that the types correspond correctly:
12647 A numeric sequence structure may be equivalenced to another sequence
12648 structure, an object of default integer type, default real type, double
12649 precision real type, default logical type such that components of the
12650 structure ultimately only become associated to objects of the same
12651 kind. A character sequence structure may be equivalenced to an object
12652 of default character kind or another character sequence structure.
12653 Other objects may be equivalenced only to objects of the same type and
12654 kind parameters. */
12656 /* Identical types are unconditionally OK. */
12657 if (object
== 1 || gfc_compare_types (last_ts
, &sym
->ts
))
12658 goto identical_types
;
12660 last_eq_type
= sequence_type (*last_ts
);
12661 eq_type
= sequence_type (sym
->ts
);
12663 /* Since the pair of objects is not of the same type, mixed or
12664 non-default sequences can be rejected. */
12666 msg
= "Sequence %s with mixed components in EQUIVALENCE "
12667 "statement at %L with different type objects";
12669 && last_eq_type
== SEQ_MIXED
12670 && gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
)
12672 || (eq_type
== SEQ_MIXED
12673 && gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
,
12674 &e
->where
) == FAILURE
))
12677 msg
= "Non-default type object or sequence %s in EQUIVALENCE "
12678 "statement at %L with objects of different type";
12680 && last_eq_type
== SEQ_NONDEFAULT
12681 && gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
,
12682 last_where
) == FAILURE
)
12683 || (eq_type
== SEQ_NONDEFAULT
12684 && gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
,
12685 &e
->where
) == FAILURE
))
12688 msg
="Non-CHARACTER object '%s' in default CHARACTER "
12689 "EQUIVALENCE statement at %L";
12690 if (last_eq_type
== SEQ_CHARACTER
12691 && eq_type
!= SEQ_CHARACTER
12692 && gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
,
12693 &e
->where
) == FAILURE
)
12696 msg
="Non-NUMERIC object '%s' in default NUMERIC "
12697 "EQUIVALENCE statement at %L";
12698 if (last_eq_type
== SEQ_NUMERIC
12699 && eq_type
!= SEQ_NUMERIC
12700 && gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
,
12701 &e
->where
) == FAILURE
)
12706 last_where
= &e
->where
;
12711 /* Shall not be an automatic array. */
12712 if (e
->ref
->type
== REF_ARRAY
12713 && gfc_resolve_array_spec (e
->ref
->u
.ar
.as
, 1) == FAILURE
)
12715 gfc_error ("Array '%s' at %L with non-constant bounds cannot be "
12716 "an EQUIVALENCE object", sym
->name
, &e
->where
);
12723 /* Shall not be a structure component. */
12724 if (r
->type
== REF_COMPONENT
)
12726 gfc_error ("Structure component '%s' at %L cannot be an "
12727 "EQUIVALENCE object",
12728 r
->u
.c
.component
->name
, &e
->where
);
12732 /* A substring shall not have length zero. */
12733 if (r
->type
== REF_SUBSTRING
)
12735 if (compare_bound (r
->u
.ss
.start
, r
->u
.ss
.end
) == CMP_GT
)
12737 gfc_error ("Substring at %L has length zero",
12738 &r
->u
.ss
.start
->where
);
12748 /* Resolve function and ENTRY types, issue diagnostics if needed. */
12751 resolve_fntype (gfc_namespace
*ns
)
12753 gfc_entry_list
*el
;
12756 if (ns
->proc_name
== NULL
|| !ns
->proc_name
->attr
.function
)
12759 /* If there are any entries, ns->proc_name is the entry master
12760 synthetic symbol and ns->entries->sym actual FUNCTION symbol. */
12762 sym
= ns
->entries
->sym
;
12764 sym
= ns
->proc_name
;
12765 if (sym
->result
== sym
12766 && sym
->ts
.type
== BT_UNKNOWN
12767 && gfc_set_default_type (sym
, 0, NULL
) == FAILURE
12768 && !sym
->attr
.untyped
)
12770 gfc_error ("Function '%s' at %L has no IMPLICIT type",
12771 sym
->name
, &sym
->declared_at
);
12772 sym
->attr
.untyped
= 1;
12775 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->ts
.u
.derived
->attr
.use_assoc
12776 && !sym
->attr
.contained
12777 && !gfc_check_access (sym
->ts
.u
.derived
->attr
.access
,
12778 sym
->ts
.u
.derived
->ns
->default_access
)
12779 && gfc_check_access (sym
->attr
.access
, sym
->ns
->default_access
))
12781 gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: PUBLIC function '%s' at "
12782 "%L of PRIVATE type '%s'", sym
->name
,
12783 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
12787 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
12789 if (el
->sym
->result
== el
->sym
12790 && el
->sym
->ts
.type
== BT_UNKNOWN
12791 && gfc_set_default_type (el
->sym
, 0, NULL
) == FAILURE
12792 && !el
->sym
->attr
.untyped
)
12794 gfc_error ("ENTRY '%s' at %L has no IMPLICIT type",
12795 el
->sym
->name
, &el
->sym
->declared_at
);
12796 el
->sym
->attr
.untyped
= 1;
12802 /* 12.3.2.1.1 Defined operators. */
12805 check_uop_procedure (gfc_symbol
*sym
, locus where
)
12807 gfc_formal_arglist
*formal
;
12809 if (!sym
->attr
.function
)
12811 gfc_error ("User operator procedure '%s' at %L must be a FUNCTION",
12812 sym
->name
, &where
);
12816 if (sym
->ts
.type
== BT_CHARACTER
12817 && !(sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
)
12818 && !(sym
->result
&& sym
->result
->ts
.u
.cl
12819 && sym
->result
->ts
.u
.cl
->length
))
12821 gfc_error ("User operator procedure '%s' at %L cannot be assumed "
12822 "character length", sym
->name
, &where
);
12826 formal
= sym
->formal
;
12827 if (!formal
|| !formal
->sym
)
12829 gfc_error ("User operator procedure '%s' at %L must have at least "
12830 "one argument", sym
->name
, &where
);
12834 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
12836 gfc_error ("First argument of operator interface at %L must be "
12837 "INTENT(IN)", &where
);
12841 if (formal
->sym
->attr
.optional
)
12843 gfc_error ("First argument of operator interface at %L cannot be "
12844 "optional", &where
);
12848 formal
= formal
->next
;
12849 if (!formal
|| !formal
->sym
)
12852 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
12854 gfc_error ("Second argument of operator interface at %L must be "
12855 "INTENT(IN)", &where
);
12859 if (formal
->sym
->attr
.optional
)
12861 gfc_error ("Second argument of operator interface at %L cannot be "
12862 "optional", &where
);
12868 gfc_error ("Operator interface at %L must have, at most, two "
12869 "arguments", &where
);
12877 gfc_resolve_uops (gfc_symtree
*symtree
)
12879 gfc_interface
*itr
;
12881 if (symtree
== NULL
)
12884 gfc_resolve_uops (symtree
->left
);
12885 gfc_resolve_uops (symtree
->right
);
12887 for (itr
= symtree
->n
.uop
->op
; itr
; itr
= itr
->next
)
12888 check_uop_procedure (itr
->sym
, itr
->sym
->declared_at
);
12892 /* Examine all of the expressions associated with a program unit,
12893 assign types to all intermediate expressions, make sure that all
12894 assignments are to compatible types and figure out which names
12895 refer to which functions or subroutines. It doesn't check code
12896 block, which is handled by resolve_code. */
12899 resolve_types (gfc_namespace
*ns
)
12905 gfc_namespace
* old_ns
= gfc_current_ns
;
12907 /* Check that all IMPLICIT types are ok. */
12908 if (!ns
->seen_implicit_none
)
12911 for (letter
= 0; letter
!= GFC_LETTERS
; ++letter
)
12912 if (ns
->set_flag
[letter
]
12913 && resolve_typespec_used (&ns
->default_type
[letter
],
12914 &ns
->implicit_loc
[letter
],
12919 gfc_current_ns
= ns
;
12921 resolve_entries (ns
);
12923 resolve_common_vars (ns
->blank_common
.head
, false);
12924 resolve_common_blocks (ns
->common_root
);
12926 resolve_contained_functions (ns
);
12928 gfc_traverse_ns (ns
, resolve_bind_c_derived_types
);
12930 for (cl
= ns
->cl_list
; cl
; cl
= cl
->next
)
12931 resolve_charlen (cl
);
12933 gfc_traverse_ns (ns
, resolve_symbol
);
12935 resolve_fntype (ns
);
12937 for (n
= ns
->contained
; n
; n
= n
->sibling
)
12939 if (gfc_pure (ns
->proc_name
) && !gfc_pure (n
->proc_name
))
12940 gfc_error ("Contained procedure '%s' at %L of a PURE procedure must "
12941 "also be PURE", n
->proc_name
->name
,
12942 &n
->proc_name
->declared_at
);
12948 gfc_check_interfaces (ns
);
12950 gfc_traverse_ns (ns
, resolve_values
);
12956 for (d
= ns
->data
; d
; d
= d
->next
)
12960 gfc_traverse_ns (ns
, gfc_formalize_init_value
);
12962 gfc_traverse_ns (ns
, gfc_verify_binding_labels
);
12964 if (ns
->common_root
!= NULL
)
12965 gfc_traverse_symtree (ns
->common_root
, resolve_bind_c_comms
);
12967 for (eq
= ns
->equiv
; eq
; eq
= eq
->next
)
12968 resolve_equivalence (eq
);
12970 /* Warn about unused labels. */
12971 if (warn_unused_label
)
12972 warn_unused_fortran_label (ns
->st_labels
);
12974 gfc_resolve_uops (ns
->uop_root
);
12976 gfc_current_ns
= old_ns
;
12980 /* Call resolve_code recursively. */
12983 resolve_codes (gfc_namespace
*ns
)
12986 bitmap_obstack old_obstack
;
12988 for (n
= ns
->contained
; n
; n
= n
->sibling
)
12991 gfc_current_ns
= ns
;
12993 /* Don't clear 'cs_base' if this is the namespace of a BLOCK construct. */
12994 if (!(ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_LABEL
))
12997 /* Set to an out of range value. */
12998 current_entry_id
= -1;
13000 old_obstack
= labels_obstack
;
13001 bitmap_obstack_initialize (&labels_obstack
);
13003 resolve_code (ns
->code
, ns
);
13005 bitmap_obstack_release (&labels_obstack
);
13006 labels_obstack
= old_obstack
;
13010 /* This function is called after a complete program unit has been compiled.
13011 Its purpose is to examine all of the expressions associated with a program
13012 unit, assign types to all intermediate expressions, make sure that all
13013 assignments are to compatible types and figure out which names refer to
13014 which functions or subroutines. */
13017 gfc_resolve (gfc_namespace
*ns
)
13019 gfc_namespace
*old_ns
;
13020 code_stack
*old_cs_base
;
13026 old_ns
= gfc_current_ns
;
13027 old_cs_base
= cs_base
;
13029 resolve_types (ns
);
13030 resolve_codes (ns
);
13032 gfc_current_ns
= old_ns
;
13033 cs_base
= old_cs_base
;