1 /* Perform type resolution on the various structures.
2 Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
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 */
33 /* Types used in equivalence statements. */
37 SEQ_NONDEFAULT
, SEQ_NUMERIC
, SEQ_CHARACTER
, SEQ_MIXED
41 /* Stack to keep track of the nesting of blocks as we move through the
42 code. See resolve_branch() and resolve_code(). */
44 typedef struct code_stack
46 struct gfc_code
*head
, *current
;
47 struct code_stack
*prev
;
49 /* This bitmap keeps track of the targets valid for a branch from
50 inside this block except for END {IF|SELECT}s of enclosing
52 bitmap reachable_labels
;
56 static code_stack
*cs_base
= NULL
;
59 /* Nonzero if we're inside a FORALL block. */
61 static int forall_flag
;
63 /* Nonzero if we're inside a OpenMP WORKSHARE or PARALLEL WORKSHARE block. */
65 static int omp_workshare_flag
;
67 /* Nonzero if we are processing a formal arglist. The corresponding function
68 resets the flag each time that it is read. */
69 static int formal_arg_flag
= 0;
71 /* True if we are resolving a specification expression. */
72 static int specification_expr
= 0;
74 /* The id of the last entry seen. */
75 static int current_entry_id
;
77 /* We use bitmaps to determine if a branch target is valid. */
78 static bitmap_obstack labels_obstack
;
81 gfc_is_formal_arg (void)
83 return formal_arg_flag
;
86 /* Is the symbol host associated? */
88 is_sym_host_assoc (gfc_symbol
*sym
, gfc_namespace
*ns
)
90 for (ns
= ns
->parent
; ns
; ns
= ns
->parent
)
99 /* Ensure a typespec used is valid; for instance, TYPE(t) is invalid if t is
100 an ABSTRACT derived-type. If where is not NULL, an error message with that
101 locus is printed, optionally using name. */
104 resolve_typespec_used (gfc_typespec
* ts
, locus
* where
, const char* name
)
106 if (ts
->type
== BT_DERIVED
&& ts
->u
.derived
->attr
.abstract
)
111 gfc_error ("'%s' at %L is of the ABSTRACT type '%s'",
112 name
, where
, ts
->u
.derived
->name
);
114 gfc_error ("ABSTRACT type '%s' used at %L",
115 ts
->u
.derived
->name
, where
);
125 /* Resolve types of formal argument lists. These have to be done early so that
126 the formal argument lists of module procedures can be copied to the
127 containing module before the individual procedures are resolved
128 individually. We also resolve argument lists of procedures in interface
129 blocks because they are self-contained scoping units.
131 Since a dummy argument cannot be a non-dummy procedure, the only
132 resort left for untyped names are the IMPLICIT types. */
135 resolve_formal_arglist (gfc_symbol
*proc
)
137 gfc_formal_arglist
*f
;
141 if (proc
->result
!= NULL
)
146 if (gfc_elemental (proc
)
147 || sym
->attr
.pointer
|| sym
->attr
.allocatable
148 || (sym
->as
&& sym
->as
->rank
> 0))
150 proc
->attr
.always_explicit
= 1;
151 sym
->attr
.always_explicit
= 1;
156 for (f
= proc
->formal
; f
; f
= f
->next
)
162 /* Alternate return placeholder. */
163 if (gfc_elemental (proc
))
164 gfc_error ("Alternate return specifier in elemental subroutine "
165 "'%s' at %L is not allowed", proc
->name
,
167 if (proc
->attr
.function
)
168 gfc_error ("Alternate return specifier in function "
169 "'%s' at %L is not allowed", proc
->name
,
174 if (sym
->attr
.if_source
!= IFSRC_UNKNOWN
)
175 resolve_formal_arglist (sym
);
177 if (sym
->attr
.subroutine
|| sym
->attr
.external
|| sym
->attr
.intrinsic
)
179 if (gfc_pure (proc
) && !gfc_pure (sym
))
181 gfc_error ("Dummy procedure '%s' of PURE procedure at %L must "
182 "also be PURE", sym
->name
, &sym
->declared_at
);
186 if (gfc_elemental (proc
))
188 gfc_error ("Dummy procedure at %L not allowed in ELEMENTAL "
189 "procedure", &sym
->declared_at
);
193 if (sym
->attr
.function
194 && sym
->ts
.type
== BT_UNKNOWN
195 && sym
->attr
.intrinsic
)
197 gfc_intrinsic_sym
*isym
;
198 isym
= gfc_find_function (sym
->name
);
199 if (isym
== NULL
|| !isym
->specific
)
201 gfc_error ("Unable to find a specific INTRINSIC procedure "
202 "for the reference '%s' at %L", sym
->name
,
211 if (sym
->ts
.type
== BT_UNKNOWN
)
213 if (!sym
->attr
.function
|| sym
->result
== sym
)
214 gfc_set_default_type (sym
, 1, sym
->ns
);
217 gfc_resolve_array_spec (sym
->as
, 0);
219 /* We can't tell if an array with dimension (:) is assumed or deferred
220 shape until we know if it has the pointer or allocatable attributes.
222 if (sym
->as
&& sym
->as
->rank
> 0 && sym
->as
->type
== AS_DEFERRED
223 && !(sym
->attr
.pointer
|| sym
->attr
.allocatable
))
225 sym
->as
->type
= AS_ASSUMED_SHAPE
;
226 for (i
= 0; i
< sym
->as
->rank
; i
++)
227 sym
->as
->lower
[i
] = gfc_int_expr (1);
230 if ((sym
->as
&& sym
->as
->rank
> 0 && sym
->as
->type
== AS_ASSUMED_SHAPE
)
231 || sym
->attr
.pointer
|| sym
->attr
.allocatable
|| sym
->attr
.target
232 || sym
->attr
.optional
)
234 proc
->attr
.always_explicit
= 1;
236 proc
->result
->attr
.always_explicit
= 1;
239 /* If the flavor is unknown at this point, it has to be a variable.
240 A procedure specification would have already set the type. */
242 if (sym
->attr
.flavor
== FL_UNKNOWN
)
243 gfc_add_flavor (&sym
->attr
, FL_VARIABLE
, sym
->name
, &sym
->declared_at
);
245 if (gfc_pure (proc
) && !sym
->attr
.pointer
246 && sym
->attr
.flavor
!= FL_PROCEDURE
)
248 if (proc
->attr
.function
&& sym
->attr
.intent
!= INTENT_IN
)
249 gfc_error ("Argument '%s' of pure function '%s' at %L must be "
250 "INTENT(IN)", sym
->name
, proc
->name
,
253 if (proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_UNKNOWN
)
254 gfc_error ("Argument '%s' of pure subroutine '%s' at %L must "
255 "have its INTENT specified", sym
->name
, proc
->name
,
259 if (gfc_elemental (proc
))
263 gfc_error ("Argument '%s' of elemental procedure at %L must "
264 "be scalar", sym
->name
, &sym
->declared_at
);
268 if (sym
->attr
.pointer
)
270 gfc_error ("Argument '%s' of elemental procedure at %L cannot "
271 "have the POINTER attribute", sym
->name
,
276 if (sym
->attr
.flavor
== FL_PROCEDURE
)
278 gfc_error ("Dummy procedure '%s' not allowed in elemental "
279 "procedure '%s' at %L", sym
->name
, proc
->name
,
285 /* Each dummy shall be specified to be scalar. */
286 if (proc
->attr
.proc
== PROC_ST_FUNCTION
)
290 gfc_error ("Argument '%s' of statement function at %L must "
291 "be scalar", sym
->name
, &sym
->declared_at
);
295 if (sym
->ts
.type
== BT_CHARACTER
)
297 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
298 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
300 gfc_error ("Character-valued argument '%s' of statement "
301 "function at %L must have constant length",
302 sym
->name
, &sym
->declared_at
);
312 /* Work function called when searching for symbols that have argument lists
313 associated with them. */
316 find_arglists (gfc_symbol
*sym
)
318 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
|| sym
->ns
!= gfc_current_ns
)
321 resolve_formal_arglist (sym
);
325 /* Given a namespace, resolve all formal argument lists within the namespace.
329 resolve_formal_arglists (gfc_namespace
*ns
)
334 gfc_traverse_ns (ns
, find_arglists
);
339 resolve_contained_fntype (gfc_symbol
*sym
, gfc_namespace
*ns
)
343 /* If this namespace is not a function or an entry master function,
345 if (! sym
|| !(sym
->attr
.function
|| sym
->attr
.flavor
== FL_VARIABLE
)
346 || sym
->attr
.entry_master
)
349 /* Try to find out of what the return type is. */
350 if (sym
->result
->ts
.type
== BT_UNKNOWN
&& sym
->result
->ts
.interface
== NULL
)
352 t
= gfc_set_default_type (sym
->result
, 0, ns
);
354 if (t
== FAILURE
&& !sym
->result
->attr
.untyped
)
356 if (sym
->result
== sym
)
357 gfc_error ("Contained function '%s' at %L has no IMPLICIT type",
358 sym
->name
, &sym
->declared_at
);
359 else if (!sym
->result
->attr
.proc_pointer
)
360 gfc_error ("Result '%s' of contained function '%s' at %L has "
361 "no IMPLICIT type", sym
->result
->name
, sym
->name
,
362 &sym
->result
->declared_at
);
363 sym
->result
->attr
.untyped
= 1;
367 /* Fortran 95 Draft Standard, page 51, Section 5.1.1.5, on the Character
368 type, lists the only ways a character length value of * can be used:
369 dummy arguments of procedures, named constants, and function results
370 in external functions. Internal function results are not on that list;
371 ergo, not permitted. */
373 if (sym
->result
->ts
.type
== BT_CHARACTER
)
375 gfc_charlen
*cl
= sym
->result
->ts
.u
.cl
;
376 if (!cl
|| !cl
->length
)
377 gfc_error ("Character-valued internal function '%s' at %L must "
378 "not be assumed length", sym
->name
, &sym
->declared_at
);
383 /* Add NEW_ARGS to the formal argument list of PROC, taking care not to
384 introduce duplicates. */
387 merge_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
389 gfc_formal_arglist
*f
, *new_arglist
;
392 for (; new_args
!= NULL
; new_args
= new_args
->next
)
394 new_sym
= new_args
->sym
;
395 /* See if this arg is already in the formal argument list. */
396 for (f
= proc
->formal
; f
; f
= f
->next
)
398 if (new_sym
== f
->sym
)
405 /* Add a new argument. Argument order is not important. */
406 new_arglist
= gfc_get_formal_arglist ();
407 new_arglist
->sym
= new_sym
;
408 new_arglist
->next
= proc
->formal
;
409 proc
->formal
= new_arglist
;
414 /* Flag the arguments that are not present in all entries. */
417 check_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
419 gfc_formal_arglist
*f
, *head
;
422 for (f
= proc
->formal
; f
; f
= f
->next
)
427 for (new_args
= head
; new_args
; new_args
= new_args
->next
)
429 if (new_args
->sym
== f
->sym
)
436 f
->sym
->attr
.not_always_present
= 1;
441 /* Resolve alternate entry points. If a symbol has multiple entry points we
442 create a new master symbol for the main routine, and turn the existing
443 symbol into an entry point. */
446 resolve_entries (gfc_namespace
*ns
)
448 gfc_namespace
*old_ns
;
452 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
453 static int master_count
= 0;
455 if (ns
->proc_name
== NULL
)
458 /* No need to do anything if this procedure doesn't have alternate entry
463 /* We may already have resolved alternate entry points. */
464 if (ns
->proc_name
->attr
.entry_master
)
467 /* If this isn't a procedure something has gone horribly wrong. */
468 gcc_assert (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
);
470 /* Remember the current namespace. */
471 old_ns
= gfc_current_ns
;
475 /* Add the main entry point to the list of entry points. */
476 el
= gfc_get_entry_list ();
477 el
->sym
= ns
->proc_name
;
479 el
->next
= ns
->entries
;
481 ns
->proc_name
->attr
.entry
= 1;
483 /* If it is a module function, it needs to be in the right namespace
484 so that gfc_get_fake_result_decl can gather up the results. The
485 need for this arose in get_proc_name, where these beasts were
486 left in their own namespace, to keep prior references linked to
487 the entry declaration.*/
488 if (ns
->proc_name
->attr
.function
489 && ns
->parent
&& ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
492 /* Do the same for entries where the master is not a module
493 procedure. These are retained in the module namespace because
494 of the module procedure declaration. */
495 for (el
= el
->next
; el
; el
= el
->next
)
496 if (el
->sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
497 && el
->sym
->attr
.mod_proc
)
501 /* Add an entry statement for it. */
508 /* Create a new symbol for the master function. */
509 /* Give the internal function a unique name (within this file).
510 Also include the function name so the user has some hope of figuring
511 out what is going on. */
512 snprintf (name
, GFC_MAX_SYMBOL_LEN
, "master.%d.%s",
513 master_count
++, ns
->proc_name
->name
);
514 gfc_get_ha_symbol (name
, &proc
);
515 gcc_assert (proc
!= NULL
);
517 gfc_add_procedure (&proc
->attr
, PROC_INTERNAL
, proc
->name
, NULL
);
518 if (ns
->proc_name
->attr
.subroutine
)
519 gfc_add_subroutine (&proc
->attr
, proc
->name
, NULL
);
523 gfc_typespec
*ts
, *fts
;
524 gfc_array_spec
*as
, *fas
;
525 gfc_add_function (&proc
->attr
, proc
->name
, NULL
);
527 fas
= ns
->entries
->sym
->as
;
528 fas
= fas
? fas
: ns
->entries
->sym
->result
->as
;
529 fts
= &ns
->entries
->sym
->result
->ts
;
530 if (fts
->type
== BT_UNKNOWN
)
531 fts
= gfc_get_default_type (ns
->entries
->sym
->result
->name
, NULL
);
532 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
534 ts
= &el
->sym
->result
->ts
;
536 as
= as
? as
: el
->sym
->result
->as
;
537 if (ts
->type
== BT_UNKNOWN
)
538 ts
= gfc_get_default_type (el
->sym
->result
->name
, NULL
);
540 if (! gfc_compare_types (ts
, fts
)
541 || (el
->sym
->result
->attr
.dimension
542 != ns
->entries
->sym
->result
->attr
.dimension
)
543 || (el
->sym
->result
->attr
.pointer
544 != ns
->entries
->sym
->result
->attr
.pointer
))
546 else if (as
&& fas
&& ns
->entries
->sym
->result
!= el
->sym
->result
547 && gfc_compare_array_spec (as
, fas
) == 0)
548 gfc_error ("Function %s at %L has entries with mismatched "
549 "array specifications", ns
->entries
->sym
->name
,
550 &ns
->entries
->sym
->declared_at
);
551 /* The characteristics need to match and thus both need to have
552 the same string length, i.e. both len=*, or both len=4.
553 Having both len=<variable> is also possible, but difficult to
554 check at compile time. */
555 else if (ts
->type
== BT_CHARACTER
&& ts
->u
.cl
&& fts
->u
.cl
556 && (((ts
->u
.cl
->length
&& !fts
->u
.cl
->length
)
557 ||(!ts
->u
.cl
->length
&& fts
->u
.cl
->length
))
559 && ts
->u
.cl
->length
->expr_type
560 != fts
->u
.cl
->length
->expr_type
)
562 && ts
->u
.cl
->length
->expr_type
== EXPR_CONSTANT
563 && mpz_cmp (ts
->u
.cl
->length
->value
.integer
,
564 fts
->u
.cl
->length
->value
.integer
) != 0)))
565 gfc_notify_std (GFC_STD_GNU
, "Extension: Function %s at %L with "
566 "entries returning variables of different "
567 "string lengths", ns
->entries
->sym
->name
,
568 &ns
->entries
->sym
->declared_at
);
573 sym
= ns
->entries
->sym
->result
;
574 /* All result types the same. */
576 if (sym
->attr
.dimension
)
577 gfc_set_array_spec (proc
, gfc_copy_array_spec (sym
->as
), NULL
);
578 if (sym
->attr
.pointer
)
579 gfc_add_pointer (&proc
->attr
, NULL
);
583 /* Otherwise the result will be passed through a union by
585 proc
->attr
.mixed_entry_master
= 1;
586 for (el
= ns
->entries
; el
; el
= el
->next
)
588 sym
= el
->sym
->result
;
589 if (sym
->attr
.dimension
)
591 if (el
== ns
->entries
)
592 gfc_error ("FUNCTION result %s can't be an array in "
593 "FUNCTION %s at %L", sym
->name
,
594 ns
->entries
->sym
->name
, &sym
->declared_at
);
596 gfc_error ("ENTRY result %s can't be an array in "
597 "FUNCTION %s at %L", sym
->name
,
598 ns
->entries
->sym
->name
, &sym
->declared_at
);
600 else if (sym
->attr
.pointer
)
602 if (el
== ns
->entries
)
603 gfc_error ("FUNCTION result %s can't be a POINTER in "
604 "FUNCTION %s at %L", sym
->name
,
605 ns
->entries
->sym
->name
, &sym
->declared_at
);
607 gfc_error ("ENTRY result %s can't be a POINTER in "
608 "FUNCTION %s at %L", sym
->name
,
609 ns
->entries
->sym
->name
, &sym
->declared_at
);
614 if (ts
->type
== BT_UNKNOWN
)
615 ts
= gfc_get_default_type (sym
->name
, NULL
);
619 if (ts
->kind
== gfc_default_integer_kind
)
623 if (ts
->kind
== gfc_default_real_kind
624 || ts
->kind
== gfc_default_double_kind
)
628 if (ts
->kind
== gfc_default_complex_kind
)
632 if (ts
->kind
== gfc_default_logical_kind
)
636 /* We will issue error elsewhere. */
644 if (el
== ns
->entries
)
645 gfc_error ("FUNCTION result %s can't be of type %s "
646 "in FUNCTION %s at %L", sym
->name
,
647 gfc_typename (ts
), ns
->entries
->sym
->name
,
650 gfc_error ("ENTRY result %s can't be of type %s "
651 "in FUNCTION %s at %L", sym
->name
,
652 gfc_typename (ts
), ns
->entries
->sym
->name
,
659 proc
->attr
.access
= ACCESS_PRIVATE
;
660 proc
->attr
.entry_master
= 1;
662 /* Merge all the entry point arguments. */
663 for (el
= ns
->entries
; el
; el
= el
->next
)
664 merge_argument_lists (proc
, el
->sym
->formal
);
666 /* Check the master formal arguments for any that are not
667 present in all entry points. */
668 for (el
= ns
->entries
; el
; el
= el
->next
)
669 check_argument_lists (proc
, el
->sym
->formal
);
671 /* Use the master function for the function body. */
672 ns
->proc_name
= proc
;
674 /* Finalize the new symbols. */
675 gfc_commit_symbols ();
677 /* Restore the original namespace. */
678 gfc_current_ns
= old_ns
;
683 has_default_initializer (gfc_symbol
*der
)
687 gcc_assert (der
->attr
.flavor
== FL_DERIVED
);
688 for (c
= der
->components
; c
; c
= c
->next
)
689 if ((c
->ts
.type
!= BT_DERIVED
&& c
->initializer
)
690 || (c
->ts
.type
== BT_DERIVED
691 && (!c
->attr
.pointer
&& has_default_initializer (c
->ts
.u
.derived
))))
697 /* Resolve common variables. */
699 resolve_common_vars (gfc_symbol
*sym
, bool named_common
)
701 gfc_symbol
*csym
= sym
;
703 for (; csym
; csym
= csym
->common_next
)
705 if (csym
->value
|| csym
->attr
.data
)
707 if (!csym
->ns
->is_block_data
)
708 gfc_notify_std (GFC_STD_GNU
, "Variable '%s' at %L is in COMMON "
709 "but only in BLOCK DATA initialization is "
710 "allowed", csym
->name
, &csym
->declared_at
);
711 else if (!named_common
)
712 gfc_notify_std (GFC_STD_GNU
, "Initialized variable '%s' at %L is "
713 "in a blank COMMON but initialization is only "
714 "allowed in named common blocks", csym
->name
,
718 if (csym
->ts
.type
!= BT_DERIVED
)
721 if (!(csym
->ts
.u
.derived
->attr
.sequence
722 || csym
->ts
.u
.derived
->attr
.is_bind_c
))
723 gfc_error_now ("Derived type variable '%s' in COMMON at %L "
724 "has neither the SEQUENCE nor the BIND(C) "
725 "attribute", csym
->name
, &csym
->declared_at
);
726 if (csym
->ts
.u
.derived
->attr
.alloc_comp
)
727 gfc_error_now ("Derived type variable '%s' in COMMON at %L "
728 "has an ultimate component that is "
729 "allocatable", csym
->name
, &csym
->declared_at
);
730 if (has_default_initializer (csym
->ts
.u
.derived
))
731 gfc_error_now ("Derived type variable '%s' in COMMON at %L "
732 "may not have default initializer", csym
->name
,
735 if (csym
->attr
.flavor
== FL_UNKNOWN
&& !csym
->attr
.proc_pointer
)
736 gfc_add_flavor (&csym
->attr
, FL_VARIABLE
, csym
->name
, &csym
->declared_at
);
740 /* Resolve common blocks. */
742 resolve_common_blocks (gfc_symtree
*common_root
)
746 if (common_root
== NULL
)
749 if (common_root
->left
)
750 resolve_common_blocks (common_root
->left
);
751 if (common_root
->right
)
752 resolve_common_blocks (common_root
->right
);
754 resolve_common_vars (common_root
->n
.common
->head
, true);
756 gfc_find_symbol (common_root
->name
, gfc_current_ns
, 0, &sym
);
760 if (sym
->attr
.flavor
== FL_PARAMETER
)
761 gfc_error ("COMMON block '%s' at %L is used as PARAMETER at %L",
762 sym
->name
, &common_root
->n
.common
->where
, &sym
->declared_at
);
764 if (sym
->attr
.intrinsic
)
765 gfc_error ("COMMON block '%s' at %L is also an intrinsic procedure",
766 sym
->name
, &common_root
->n
.common
->where
);
767 else if (sym
->attr
.result
768 ||(sym
->attr
.function
&& gfc_current_ns
->proc_name
== sym
))
769 gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: COMMON block '%s' at %L "
770 "that is also a function result", sym
->name
,
771 &common_root
->n
.common
->where
);
772 else if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.proc
!= PROC_INTERNAL
773 && sym
->attr
.proc
!= PROC_ST_FUNCTION
)
774 gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: COMMON block '%s' at %L "
775 "that is also a global procedure", sym
->name
,
776 &common_root
->n
.common
->where
);
780 /* Resolve contained function types. Because contained functions can call one
781 another, they have to be worked out before any of the contained procedures
784 The good news is that if a function doesn't already have a type, the only
785 way it can get one is through an IMPLICIT type or a RESULT variable, because
786 by definition contained functions are contained namespace they're contained
787 in, not in a sibling or parent namespace. */
790 resolve_contained_functions (gfc_namespace
*ns
)
792 gfc_namespace
*child
;
795 resolve_formal_arglists (ns
);
797 for (child
= ns
->contained
; child
; child
= child
->sibling
)
799 /* Resolve alternate entry points first. */
800 resolve_entries (child
);
802 /* Then check function return types. */
803 resolve_contained_fntype (child
->proc_name
, child
);
804 for (el
= child
->entries
; el
; el
= el
->next
)
805 resolve_contained_fntype (el
->sym
, child
);
810 /* Resolve all of the elements of a structure constructor and make sure that
811 the types are correct. */
814 resolve_structure_cons (gfc_expr
*expr
)
816 gfc_constructor
*cons
;
822 cons
= expr
->value
.constructor
;
823 /* A constructor may have references if it is the result of substituting a
824 parameter variable. In this case we just pull out the component we
827 comp
= expr
->ref
->u
.c
.sym
->components
;
829 comp
= expr
->ts
.u
.derived
->components
;
831 /* See if the user is trying to invoke a structure constructor for one of
832 the iso_c_binding derived types. */
833 if (expr
->ts
.type
== BT_DERIVED
&& expr
->ts
.u
.derived
834 && expr
->ts
.u
.derived
->ts
.is_iso_c
&& cons
&& cons
->expr
!= NULL
)
836 gfc_error ("Components of structure constructor '%s' at %L are PRIVATE",
837 expr
->ts
.u
.derived
->name
, &(expr
->where
));
841 for (; comp
; comp
= comp
->next
, cons
= cons
->next
)
848 if (gfc_resolve_expr (cons
->expr
) == FAILURE
)
854 rank
= comp
->as
? comp
->as
->rank
: 0;
855 if (cons
->expr
->expr_type
!= EXPR_NULL
&& rank
!= cons
->expr
->rank
856 && (comp
->attr
.allocatable
|| cons
->expr
->rank
))
858 gfc_error ("The rank of the element in the derived type "
859 "constructor at %L does not match that of the "
860 "component (%d/%d)", &cons
->expr
->where
,
861 cons
->expr
->rank
, rank
);
865 /* If we don't have the right type, try to convert it. */
867 if (!gfc_compare_types (&cons
->expr
->ts
, &comp
->ts
))
870 if (comp
->attr
.pointer
&& cons
->expr
->ts
.type
!= BT_UNKNOWN
)
871 gfc_error ("The element in the derived type constructor at %L, "
872 "for pointer component '%s', is %s but should be %s",
873 &cons
->expr
->where
, comp
->name
,
874 gfc_basic_typename (cons
->expr
->ts
.type
),
875 gfc_basic_typename (comp
->ts
.type
));
877 t
= gfc_convert_type (cons
->expr
, &comp
->ts
, 1);
880 if (cons
->expr
->expr_type
== EXPR_NULL
881 && !(comp
->attr
.pointer
|| comp
->attr
.allocatable
882 || comp
->attr
.proc_pointer
))
885 gfc_error ("The NULL in the derived type constructor at %L is "
886 "being applied to component '%s', which is neither "
887 "a POINTER nor ALLOCATABLE", &cons
->expr
->where
,
891 if (!comp
->attr
.pointer
|| cons
->expr
->expr_type
== EXPR_NULL
)
894 a
= gfc_expr_attr (cons
->expr
);
896 if (!a
.pointer
&& !a
.target
)
899 gfc_error ("The element in the derived type constructor at %L, "
900 "for pointer component '%s' should be a POINTER or "
901 "a TARGET", &cons
->expr
->where
, comp
->name
);
909 /****************** Expression name resolution ******************/
911 /* Returns 0 if a symbol was not declared with a type or
912 attribute declaration statement, nonzero otherwise. */
915 was_declared (gfc_symbol
*sym
)
921 if (!a
.implicit_type
&& sym
->ts
.type
!= BT_UNKNOWN
)
924 if (a
.allocatable
|| a
.dimension
|| a
.dummy
|| a
.external
|| a
.intrinsic
925 || a
.optional
|| a
.pointer
|| a
.save
|| a
.target
|| a
.volatile_
926 || a
.value
|| a
.access
!= ACCESS_UNKNOWN
|| a
.intent
!= INTENT_UNKNOWN
)
933 /* Determine if a symbol is generic or not. */
936 generic_sym (gfc_symbol
*sym
)
940 if (sym
->attr
.generic
||
941 (sym
->attr
.intrinsic
&& gfc_generic_intrinsic (sym
->name
)))
944 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
947 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
954 return generic_sym (s
);
961 /* Determine if a symbol is specific or not. */
964 specific_sym (gfc_symbol
*sym
)
968 if (sym
->attr
.if_source
== IFSRC_IFBODY
969 || sym
->attr
.proc
== PROC_MODULE
970 || sym
->attr
.proc
== PROC_INTERNAL
971 || sym
->attr
.proc
== PROC_ST_FUNCTION
972 || (sym
->attr
.intrinsic
&& gfc_specific_intrinsic (sym
->name
))
973 || sym
->attr
.external
)
976 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
979 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
981 return (s
== NULL
) ? 0 : specific_sym (s
);
985 /* Figure out if the procedure is specific, generic or unknown. */
988 { PTYPE_GENERIC
= 1, PTYPE_SPECIFIC
, PTYPE_UNKNOWN
}
992 procedure_kind (gfc_symbol
*sym
)
994 if (generic_sym (sym
))
995 return PTYPE_GENERIC
;
997 if (specific_sym (sym
))
998 return PTYPE_SPECIFIC
;
1000 return PTYPE_UNKNOWN
;
1003 /* Check references to assumed size arrays. The flag need_full_assumed_size
1004 is nonzero when matching actual arguments. */
1006 static int need_full_assumed_size
= 0;
1009 check_assumed_size_reference (gfc_symbol
*sym
, gfc_expr
*e
)
1011 if (need_full_assumed_size
|| !(sym
->as
&& sym
->as
->type
== AS_ASSUMED_SIZE
))
1014 /* FIXME: The comparison "e->ref->u.ar.type == AR_FULL" is wrong.
1015 What should it be? */
1016 if ((e
->ref
->u
.ar
.end
[e
->ref
->u
.ar
.as
->rank
- 1] == NULL
)
1017 && (e
->ref
->u
.ar
.as
->type
== AS_ASSUMED_SIZE
)
1018 && (e
->ref
->u
.ar
.type
== AR_FULL
))
1020 gfc_error ("The upper bound in the last dimension must "
1021 "appear in the reference to the assumed size "
1022 "array '%s' at %L", sym
->name
, &e
->where
);
1029 /* Look for bad assumed size array references in argument expressions
1030 of elemental and array valued intrinsic procedures. Since this is
1031 called from procedure resolution functions, it only recurses at
1035 resolve_assumed_size_actual (gfc_expr
*e
)
1040 switch (e
->expr_type
)
1043 if (e
->symtree
&& check_assumed_size_reference (e
->symtree
->n
.sym
, e
))
1048 if (resolve_assumed_size_actual (e
->value
.op
.op1
)
1049 || resolve_assumed_size_actual (e
->value
.op
.op2
))
1060 /* Check a generic procedure, passed as an actual argument, to see if
1061 there is a matching specific name. If none, it is an error, and if
1062 more than one, the reference is ambiguous. */
1064 count_specific_procs (gfc_expr
*e
)
1071 sym
= e
->symtree
->n
.sym
;
1073 for (p
= sym
->generic
; p
; p
= p
->next
)
1074 if (strcmp (sym
->name
, p
->sym
->name
) == 0)
1076 e
->symtree
= gfc_find_symtree (p
->sym
->ns
->sym_root
,
1082 gfc_error ("'%s' at %L is ambiguous", e
->symtree
->n
.sym
->name
,
1086 gfc_error ("GENERIC procedure '%s' is not allowed as an actual "
1087 "argument at %L", sym
->name
, &e
->where
);
1093 /* See if a call to sym could possibly be a not allowed RECURSION because of
1094 a missing RECURIVE declaration. This means that either sym is the current
1095 context itself, or sym is the parent of a contained procedure calling its
1096 non-RECURSIVE containing procedure.
1097 This also works if sym is an ENTRY. */
1100 is_illegal_recursion (gfc_symbol
* sym
, gfc_namespace
* context
)
1102 gfc_symbol
* proc_sym
;
1103 gfc_symbol
* context_proc
;
1105 gcc_assert (sym
->attr
.flavor
== FL_PROCEDURE
);
1107 /* If we've got an ENTRY, find real procedure. */
1108 if (sym
->attr
.entry
&& sym
->ns
->entries
)
1109 proc_sym
= sym
->ns
->entries
->sym
;
1113 /* If sym is RECURSIVE, all is well of course. */
1114 if (proc_sym
->attr
.recursive
|| gfc_option
.flag_recursive
)
1117 /* Find the context procdure's "real" symbol if it has entries. */
1118 context_proc
= (context
->entries
? context
->entries
->sym
1119 : context
->proc_name
);
1123 /* A call from sym's body to itself is recursion, of course. */
1124 if (context_proc
== proc_sym
)
1127 /* The same is true if context is a contained procedure and sym the
1129 if (context_proc
->attr
.contained
)
1131 gfc_symbol
* parent_proc
;
1133 gcc_assert (context
->parent
);
1134 parent_proc
= (context
->parent
->entries
? context
->parent
->entries
->sym
1135 : context
->parent
->proc_name
);
1137 if (parent_proc
== proc_sym
)
1145 /* Resolve an intrinsic procedure: Set its function/subroutine attribute,
1146 its typespec and formal argument list. */
1149 resolve_intrinsic (gfc_symbol
*sym
, locus
*loc
)
1151 gfc_intrinsic_sym
* isym
;
1157 /* We already know this one is an intrinsic, so we don't call
1158 gfc_is_intrinsic for full checking but rather use gfc_find_function and
1159 gfc_find_subroutine directly to check whether it is a function or
1162 if ((isym
= gfc_find_function (sym
->name
)))
1164 if (sym
->ts
.type
!= BT_UNKNOWN
&& gfc_option
.warn_surprising
1165 && !sym
->attr
.implicit_type
)
1166 gfc_warning ("Type specified for intrinsic function '%s' at %L is"
1167 " ignored", sym
->name
, &sym
->declared_at
);
1169 if (!sym
->attr
.function
&&
1170 gfc_add_function (&sym
->attr
, sym
->name
, loc
) == FAILURE
)
1175 else if ((isym
= gfc_find_subroutine (sym
->name
)))
1177 if (sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.implicit_type
)
1179 gfc_error ("Intrinsic subroutine '%s' at %L shall not have a type"
1180 " specifier", sym
->name
, &sym
->declared_at
);
1184 if (!sym
->attr
.subroutine
&&
1185 gfc_add_subroutine (&sym
->attr
, sym
->name
, loc
) == FAILURE
)
1190 gfc_error ("'%s' declared INTRINSIC at %L does not exist", sym
->name
,
1195 gfc_copy_formal_args_intr (sym
, isym
);
1197 /* Check it is actually available in the standard settings. */
1198 if (gfc_check_intrinsic_standard (isym
, &symstd
, false, sym
->declared_at
)
1201 gfc_error ("The intrinsic '%s' declared INTRINSIC at %L is not"
1202 " available in the current standard settings but %s. Use"
1203 " an appropriate -std=* option or enable -fall-intrinsics"
1204 " in order to use it.",
1205 sym
->name
, &sym
->declared_at
, symstd
);
1213 /* Resolve a procedure expression, like passing it to a called procedure or as
1214 RHS for a procedure pointer assignment. */
1217 resolve_procedure_expression (gfc_expr
* expr
)
1221 if (expr
->expr_type
!= EXPR_VARIABLE
)
1223 gcc_assert (expr
->symtree
);
1225 sym
= expr
->symtree
->n
.sym
;
1227 if (sym
->attr
.intrinsic
)
1228 resolve_intrinsic (sym
, &expr
->where
);
1230 if (sym
->attr
.flavor
!= FL_PROCEDURE
1231 || (sym
->attr
.function
&& sym
->result
== sym
))
1234 /* A non-RECURSIVE procedure that is used as procedure expression within its
1235 own body is in danger of being called recursively. */
1236 if (is_illegal_recursion (sym
, gfc_current_ns
))
1237 gfc_warning ("Non-RECURSIVE procedure '%s' at %L is possibly calling"
1238 " itself recursively. Declare it RECURSIVE or use"
1239 " -frecursive", sym
->name
, &expr
->where
);
1245 /* Resolve an actual argument list. Most of the time, this is just
1246 resolving the expressions in the list.
1247 The exception is that we sometimes have to decide whether arguments
1248 that look like procedure arguments are really simple variable
1252 resolve_actual_arglist (gfc_actual_arglist
*arg
, procedure_type ptype
,
1253 bool no_formal_args
)
1256 gfc_symtree
*parent_st
;
1258 int save_need_full_assumed_size
;
1259 gfc_component
*comp
;
1261 for (; arg
; arg
= arg
->next
)
1266 /* Check the label is a valid branching target. */
1269 if (arg
->label
->defined
== ST_LABEL_UNKNOWN
)
1271 gfc_error ("Label %d referenced at %L is never defined",
1272 arg
->label
->value
, &arg
->label
->where
);
1279 if (gfc_is_proc_ptr_comp (e
, &comp
))
1282 if (e
->value
.compcall
.actual
== NULL
)
1283 e
->expr_type
= EXPR_VARIABLE
;
1286 if (comp
->as
!= NULL
)
1287 e
->rank
= comp
->as
->rank
;
1288 e
->expr_type
= EXPR_FUNCTION
;
1293 if (e
->expr_type
== EXPR_VARIABLE
1294 && e
->symtree
->n
.sym
->attr
.generic
1296 && count_specific_procs (e
) != 1)
1299 if (e
->ts
.type
!= BT_PROCEDURE
)
1301 save_need_full_assumed_size
= need_full_assumed_size
;
1302 if (e
->expr_type
!= EXPR_VARIABLE
)
1303 need_full_assumed_size
= 0;
1304 if (gfc_resolve_expr (e
) != SUCCESS
)
1306 need_full_assumed_size
= save_need_full_assumed_size
;
1310 /* See if the expression node should really be a variable reference. */
1312 sym
= e
->symtree
->n
.sym
;
1314 if (sym
->attr
.flavor
== FL_PROCEDURE
1315 || sym
->attr
.intrinsic
1316 || sym
->attr
.external
)
1320 /* If a procedure is not already determined to be something else
1321 check if it is intrinsic. */
1322 if (!sym
->attr
.intrinsic
1323 && !(sym
->attr
.external
|| sym
->attr
.use_assoc
1324 || sym
->attr
.if_source
== IFSRC_IFBODY
)
1325 && gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, e
->where
))
1326 sym
->attr
.intrinsic
= 1;
1328 if (sym
->attr
.proc
== PROC_ST_FUNCTION
)
1330 gfc_error ("Statement function '%s' at %L is not allowed as an "
1331 "actual argument", sym
->name
, &e
->where
);
1334 actual_ok
= gfc_intrinsic_actual_ok (sym
->name
,
1335 sym
->attr
.subroutine
);
1336 if (sym
->attr
.intrinsic
&& actual_ok
== 0)
1338 gfc_error ("Intrinsic '%s' at %L is not allowed as an "
1339 "actual argument", sym
->name
, &e
->where
);
1342 if (sym
->attr
.contained
&& !sym
->attr
.use_assoc
1343 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
1345 gfc_error ("Internal procedure '%s' is not allowed as an "
1346 "actual argument at %L", sym
->name
, &e
->where
);
1349 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
)
1351 gfc_error ("ELEMENTAL non-INTRINSIC procedure '%s' is not "
1352 "allowed as an actual argument at %L", sym
->name
,
1356 /* Check if a generic interface has a specific procedure
1357 with the same name before emitting an error. */
1358 if (sym
->attr
.generic
&& count_specific_procs (e
) != 1)
1361 /* Just in case a specific was found for the expression. */
1362 sym
= e
->symtree
->n
.sym
;
1364 /* If the symbol is the function that names the current (or
1365 parent) scope, then we really have a variable reference. */
1367 if (sym
->attr
.function
&& sym
->result
== sym
1368 && (sym
->ns
->proc_name
== sym
1369 || (sym
->ns
->parent
!= NULL
1370 && sym
->ns
->parent
->proc_name
== sym
)))
1373 /* If all else fails, see if we have a specific intrinsic. */
1374 if (sym
->ts
.type
== BT_UNKNOWN
&& sym
->attr
.intrinsic
)
1376 gfc_intrinsic_sym
*isym
;
1378 isym
= gfc_find_function (sym
->name
);
1379 if (isym
== NULL
|| !isym
->specific
)
1381 gfc_error ("Unable to find a specific INTRINSIC procedure "
1382 "for the reference '%s' at %L", sym
->name
,
1387 sym
->attr
.intrinsic
= 1;
1388 sym
->attr
.function
= 1;
1391 if (gfc_resolve_expr (e
) == FAILURE
)
1396 /* See if the name is a module procedure in a parent unit. */
1398 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1401 if (gfc_find_sym_tree (sym
->name
, sym
->ns
->parent
, 1, &parent_st
))
1403 gfc_error ("Symbol '%s' at %L is ambiguous", sym
->name
, &e
->where
);
1407 if (parent_st
== NULL
)
1410 sym
= parent_st
->n
.sym
;
1411 e
->symtree
= parent_st
; /* Point to the right thing. */
1413 if (sym
->attr
.flavor
== FL_PROCEDURE
1414 || sym
->attr
.intrinsic
1415 || sym
->attr
.external
)
1417 if (gfc_resolve_expr (e
) == FAILURE
)
1423 e
->expr_type
= EXPR_VARIABLE
;
1425 if (sym
->as
!= NULL
)
1427 e
->rank
= sym
->as
->rank
;
1428 e
->ref
= gfc_get_ref ();
1429 e
->ref
->type
= REF_ARRAY
;
1430 e
->ref
->u
.ar
.type
= AR_FULL
;
1431 e
->ref
->u
.ar
.as
= sym
->as
;
1434 /* Expressions are assigned a default ts.type of BT_PROCEDURE in
1435 primary.c (match_actual_arg). If above code determines that it
1436 is a variable instead, it needs to be resolved as it was not
1437 done at the beginning of this function. */
1438 save_need_full_assumed_size
= need_full_assumed_size
;
1439 if (e
->expr_type
!= EXPR_VARIABLE
)
1440 need_full_assumed_size
= 0;
1441 if (gfc_resolve_expr (e
) != SUCCESS
)
1443 need_full_assumed_size
= save_need_full_assumed_size
;
1446 /* Check argument list functions %VAL, %LOC and %REF. There is
1447 nothing to do for %REF. */
1448 if (arg
->name
&& arg
->name
[0] == '%')
1450 if (strncmp ("%VAL", arg
->name
, 4) == 0)
1452 if (e
->ts
.type
== BT_CHARACTER
|| e
->ts
.type
== BT_DERIVED
)
1454 gfc_error ("By-value argument at %L is not of numeric "
1461 gfc_error ("By-value argument at %L cannot be an array or "
1462 "an array section", &e
->where
);
1466 /* Intrinsics are still PROC_UNKNOWN here. However,
1467 since same file external procedures are not resolvable
1468 in gfortran, it is a good deal easier to leave them to
1470 if (ptype
!= PROC_UNKNOWN
1471 && ptype
!= PROC_DUMMY
1472 && ptype
!= PROC_EXTERNAL
1473 && ptype
!= PROC_MODULE
)
1475 gfc_error ("By-value argument at %L is not allowed "
1476 "in this context", &e
->where
);
1481 /* Statement functions have already been excluded above. */
1482 else if (strncmp ("%LOC", arg
->name
, 4) == 0
1483 && e
->ts
.type
== BT_PROCEDURE
)
1485 if (e
->symtree
->n
.sym
->attr
.proc
== PROC_INTERNAL
)
1487 gfc_error ("Passing internal procedure at %L by location "
1488 "not allowed", &e
->where
);
1499 /* Do the checks of the actual argument list that are specific to elemental
1500 procedures. If called with c == NULL, we have a function, otherwise if
1501 expr == NULL, we have a subroutine. */
1504 resolve_elemental_actual (gfc_expr
*expr
, gfc_code
*c
)
1506 gfc_actual_arglist
*arg0
;
1507 gfc_actual_arglist
*arg
;
1508 gfc_symbol
*esym
= NULL
;
1509 gfc_intrinsic_sym
*isym
= NULL
;
1511 gfc_intrinsic_arg
*iformal
= NULL
;
1512 gfc_formal_arglist
*eformal
= NULL
;
1513 bool formal_optional
= false;
1514 bool set_by_optional
= false;
1518 /* Is this an elemental procedure? */
1519 if (expr
&& expr
->value
.function
.actual
!= NULL
)
1521 if (expr
->value
.function
.esym
!= NULL
1522 && expr
->value
.function
.esym
->attr
.elemental
)
1524 arg0
= expr
->value
.function
.actual
;
1525 esym
= expr
->value
.function
.esym
;
1527 else if (expr
->value
.function
.isym
!= NULL
1528 && expr
->value
.function
.isym
->elemental
)
1530 arg0
= expr
->value
.function
.actual
;
1531 isym
= expr
->value
.function
.isym
;
1536 else if (c
&& c
->ext
.actual
!= NULL
)
1538 arg0
= c
->ext
.actual
;
1540 if (c
->resolved_sym
)
1541 esym
= c
->resolved_sym
;
1543 esym
= c
->symtree
->n
.sym
;
1546 if (!esym
->attr
.elemental
)
1552 /* The rank of an elemental is the rank of its array argument(s). */
1553 for (arg
= arg0
; arg
; arg
= arg
->next
)
1555 if (arg
->expr
!= NULL
&& arg
->expr
->rank
> 0)
1557 rank
= arg
->expr
->rank
;
1558 if (arg
->expr
->expr_type
== EXPR_VARIABLE
1559 && arg
->expr
->symtree
->n
.sym
->attr
.optional
)
1560 set_by_optional
= true;
1562 /* Function specific; set the result rank and shape. */
1566 if (!expr
->shape
&& arg
->expr
->shape
)
1568 expr
->shape
= gfc_get_shape (rank
);
1569 for (i
= 0; i
< rank
; i
++)
1570 mpz_init_set (expr
->shape
[i
], arg
->expr
->shape
[i
]);
1577 /* If it is an array, it shall not be supplied as an actual argument
1578 to an elemental procedure unless an array of the same rank is supplied
1579 as an actual argument corresponding to a nonoptional dummy argument of
1580 that elemental procedure(12.4.1.5). */
1581 formal_optional
= false;
1583 iformal
= isym
->formal
;
1585 eformal
= esym
->formal
;
1587 for (arg
= arg0
; arg
; arg
= arg
->next
)
1591 if (eformal
->sym
&& eformal
->sym
->attr
.optional
)
1592 formal_optional
= true;
1593 eformal
= eformal
->next
;
1595 else if (isym
&& iformal
)
1597 if (iformal
->optional
)
1598 formal_optional
= true;
1599 iformal
= iformal
->next
;
1602 formal_optional
= true;
1604 if (pedantic
&& arg
->expr
!= NULL
1605 && arg
->expr
->expr_type
== EXPR_VARIABLE
1606 && arg
->expr
->symtree
->n
.sym
->attr
.optional
1609 && (set_by_optional
|| arg
->expr
->rank
!= rank
)
1610 && !(isym
&& isym
->id
== GFC_ISYM_CONVERSION
))
1612 gfc_warning ("'%s' at %L is an array and OPTIONAL; IF IT IS "
1613 "MISSING, it cannot be the actual argument of an "
1614 "ELEMENTAL procedure unless there is a non-optional "
1615 "argument with the same rank (12.4.1.5)",
1616 arg
->expr
->symtree
->n
.sym
->name
, &arg
->expr
->where
);
1621 for (arg
= arg0
; arg
; arg
= arg
->next
)
1623 if (arg
->expr
== NULL
|| arg
->expr
->rank
== 0)
1626 /* Being elemental, the last upper bound of an assumed size array
1627 argument must be present. */
1628 if (resolve_assumed_size_actual (arg
->expr
))
1631 /* Elemental procedure's array actual arguments must conform. */
1634 if (gfc_check_conformance (arg
->expr
, e
,
1635 "elemental procedure") == FAILURE
)
1642 /* INTENT(OUT) is only allowed for subroutines; if any actual argument
1643 is an array, the intent inout/out variable needs to be also an array. */
1644 if (rank
> 0 && esym
&& expr
== NULL
)
1645 for (eformal
= esym
->formal
, arg
= arg0
; arg
&& eformal
;
1646 arg
= arg
->next
, eformal
= eformal
->next
)
1647 if ((eformal
->sym
->attr
.intent
== INTENT_OUT
1648 || eformal
->sym
->attr
.intent
== INTENT_INOUT
)
1649 && arg
->expr
&& arg
->expr
->rank
== 0)
1651 gfc_error ("Actual argument at %L for INTENT(%s) dummy '%s' of "
1652 "ELEMENTAL subroutine '%s' is a scalar, but another "
1653 "actual argument is an array", &arg
->expr
->where
,
1654 (eformal
->sym
->attr
.intent
== INTENT_OUT
) ? "OUT"
1655 : "INOUT", eformal
->sym
->name
, esym
->name
);
1662 /* Go through each actual argument in ACTUAL and see if it can be
1663 implemented as an inlined, non-copying intrinsic. FNSYM is the
1664 function being called, or NULL if not known. */
1667 find_noncopying_intrinsics (gfc_symbol
*fnsym
, gfc_actual_arglist
*actual
)
1669 gfc_actual_arglist
*ap
;
1672 for (ap
= actual
; ap
; ap
= ap
->next
)
1674 && (expr
= gfc_get_noncopying_intrinsic_argument (ap
->expr
))
1675 && !gfc_check_fncall_dependency (expr
, INTENT_IN
, fnsym
, actual
,
1677 ap
->expr
->inline_noncopying_intrinsic
= 1;
1681 /* This function does the checking of references to global procedures
1682 as defined in sections 18.1 and 14.1, respectively, of the Fortran
1683 77 and 95 standards. It checks for a gsymbol for the name, making
1684 one if it does not already exist. If it already exists, then the
1685 reference being resolved must correspond to the type of gsymbol.
1686 Otherwise, the new symbol is equipped with the attributes of the
1687 reference. The corresponding code that is called in creating
1688 global entities is parse.c.
1690 In addition, for all but -std=legacy, the gsymbols are used to
1691 check the interfaces of external procedures from the same file.
1692 The namespace of the gsymbol is resolved and then, once this is
1693 done the interface is checked. */
1697 not_in_recursive (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
1699 if (!gsym_ns
->proc_name
->attr
.recursive
)
1702 if (sym
->ns
== gsym_ns
)
1705 if (sym
->ns
->parent
&& sym
->ns
->parent
== gsym_ns
)
1712 not_entry_self_reference (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
1714 if (gsym_ns
->entries
)
1716 gfc_entry_list
*entry
= gsym_ns
->entries
;
1718 for (; entry
; entry
= entry
->next
)
1720 if (strcmp (sym
->name
, entry
->sym
->name
) == 0)
1722 if (strcmp (gsym_ns
->proc_name
->name
,
1723 sym
->ns
->proc_name
->name
) == 0)
1727 && strcmp (gsym_ns
->proc_name
->name
,
1728 sym
->ns
->parent
->proc_name
->name
) == 0)
1737 resolve_global_procedure (gfc_symbol
*sym
, locus
*where
,
1738 gfc_actual_arglist
**actual
, int sub
)
1742 enum gfc_symbol_type type
;
1744 type
= sub
? GSYM_SUBROUTINE
: GSYM_FUNCTION
;
1746 gsym
= gfc_get_gsymbol (sym
->name
);
1748 if ((gsym
->type
!= GSYM_UNKNOWN
&& gsym
->type
!= type
))
1749 gfc_global_used (gsym
, where
);
1751 if (gfc_option
.flag_whole_file
1752 && sym
->attr
.if_source
== IFSRC_UNKNOWN
1753 && gsym
->type
!= GSYM_UNKNOWN
1755 && gsym
->ns
->resolved
!= -1
1756 && gsym
->ns
->proc_name
1757 && not_in_recursive (sym
, gsym
->ns
)
1758 && not_entry_self_reference (sym
, gsym
->ns
))
1760 /* Make sure that translation for the gsymbol occurs before
1761 the procedure currently being resolved. */
1762 ns
= gsym
->ns
->resolved
? NULL
: gfc_global_ns_list
;
1763 for (; ns
&& ns
!= gsym
->ns
; ns
= ns
->sibling
)
1765 if (ns
->sibling
== gsym
->ns
)
1767 ns
->sibling
= gsym
->ns
->sibling
;
1768 gsym
->ns
->sibling
= gfc_global_ns_list
;
1769 gfc_global_ns_list
= gsym
->ns
;
1774 if (!gsym
->ns
->resolved
)
1776 gfc_dt_list
*old_dt_list
;
1778 /* Stash away derived types so that the backend_decls do not
1780 old_dt_list
= gfc_derived_types
;
1781 gfc_derived_types
= NULL
;
1783 gfc_resolve (gsym
->ns
);
1785 /* Store the new derived types with the global namespace. */
1786 if (gfc_derived_types
)
1787 gsym
->ns
->derived_types
= gfc_derived_types
;
1789 /* Restore the derived types of this namespace. */
1790 gfc_derived_types
= old_dt_list
;
1793 if (gsym
->ns
->proc_name
->attr
.function
1794 && gsym
->ns
->proc_name
->as
1795 && gsym
->ns
->proc_name
->as
->rank
1796 && (!sym
->as
|| sym
->as
->rank
!= gsym
->ns
->proc_name
->as
->rank
))
1797 gfc_error ("The reference to function '%s' at %L either needs an "
1798 "explicit INTERFACE or the rank is incorrect", sym
->name
,
1801 if (gfc_option
.flag_whole_file
== 1
1802 || ((gfc_option
.warn_std
& GFC_STD_LEGACY
)
1804 !(gfc_option
.warn_std
& GFC_STD_GNU
)))
1805 gfc_errors_to_warnings (1);
1807 gfc_procedure_use (gsym
->ns
->proc_name
, actual
, where
);
1809 gfc_errors_to_warnings (0);
1812 if (gsym
->type
== GSYM_UNKNOWN
)
1815 gsym
->where
= *where
;
1822 /************* Function resolution *************/
1824 /* Resolve a function call known to be generic.
1825 Section 14.1.2.4.1. */
1828 resolve_generic_f0 (gfc_expr
*expr
, gfc_symbol
*sym
)
1832 if (sym
->attr
.generic
)
1834 s
= gfc_search_interface (sym
->generic
, 0, &expr
->value
.function
.actual
);
1837 expr
->value
.function
.name
= s
->name
;
1838 expr
->value
.function
.esym
= s
;
1840 if (s
->ts
.type
!= BT_UNKNOWN
)
1842 else if (s
->result
!= NULL
&& s
->result
->ts
.type
!= BT_UNKNOWN
)
1843 expr
->ts
= s
->result
->ts
;
1846 expr
->rank
= s
->as
->rank
;
1847 else if (s
->result
!= NULL
&& s
->result
->as
!= NULL
)
1848 expr
->rank
= s
->result
->as
->rank
;
1850 gfc_set_sym_referenced (expr
->value
.function
.esym
);
1855 /* TODO: Need to search for elemental references in generic
1859 if (sym
->attr
.intrinsic
)
1860 return gfc_intrinsic_func_interface (expr
, 0);
1867 resolve_generic_f (gfc_expr
*expr
)
1872 sym
= expr
->symtree
->n
.sym
;
1876 m
= resolve_generic_f0 (expr
, sym
);
1879 else if (m
== MATCH_ERROR
)
1883 if (sym
->ns
->parent
== NULL
)
1885 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
1889 if (!generic_sym (sym
))
1893 /* Last ditch attempt. See if the reference is to an intrinsic
1894 that possesses a matching interface. 14.1.2.4 */
1895 if (sym
&& !gfc_is_intrinsic (sym
, 0, expr
->where
))
1897 gfc_error ("There is no specific function for the generic '%s' at %L",
1898 expr
->symtree
->n
.sym
->name
, &expr
->where
);
1902 m
= gfc_intrinsic_func_interface (expr
, 0);
1906 gfc_error ("Generic function '%s' at %L is not consistent with a "
1907 "specific intrinsic interface", expr
->symtree
->n
.sym
->name
,
1914 /* Resolve a function call known to be specific. */
1917 resolve_specific_f0 (gfc_symbol
*sym
, gfc_expr
*expr
)
1921 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
1923 if (sym
->attr
.dummy
)
1925 sym
->attr
.proc
= PROC_DUMMY
;
1929 sym
->attr
.proc
= PROC_EXTERNAL
;
1933 if (sym
->attr
.proc
== PROC_MODULE
1934 || sym
->attr
.proc
== PROC_ST_FUNCTION
1935 || sym
->attr
.proc
== PROC_INTERNAL
)
1938 if (sym
->attr
.intrinsic
)
1940 m
= gfc_intrinsic_func_interface (expr
, 1);
1944 gfc_error ("Function '%s' at %L is INTRINSIC but is not compatible "
1945 "with an intrinsic", sym
->name
, &expr
->where
);
1953 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
1956 expr
->ts
= sym
->result
->ts
;
1959 expr
->value
.function
.name
= sym
->name
;
1960 expr
->value
.function
.esym
= sym
;
1961 if (sym
->as
!= NULL
)
1962 expr
->rank
= sym
->as
->rank
;
1969 resolve_specific_f (gfc_expr
*expr
)
1974 sym
= expr
->symtree
->n
.sym
;
1978 m
= resolve_specific_f0 (sym
, expr
);
1981 if (m
== MATCH_ERROR
)
1984 if (sym
->ns
->parent
== NULL
)
1987 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
1993 gfc_error ("Unable to resolve the specific function '%s' at %L",
1994 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2000 /* Resolve a procedure call not known to be generic nor specific. */
2003 resolve_unknown_f (gfc_expr
*expr
)
2008 sym
= expr
->symtree
->n
.sym
;
2010 if (sym
->attr
.dummy
)
2012 sym
->attr
.proc
= PROC_DUMMY
;
2013 expr
->value
.function
.name
= sym
->name
;
2017 /* See if we have an intrinsic function reference. */
2019 if (gfc_is_intrinsic (sym
, 0, expr
->where
))
2021 if (gfc_intrinsic_func_interface (expr
, 1) == MATCH_YES
)
2026 /* The reference is to an external name. */
2028 sym
->attr
.proc
= PROC_EXTERNAL
;
2029 expr
->value
.function
.name
= sym
->name
;
2030 expr
->value
.function
.esym
= expr
->symtree
->n
.sym
;
2032 if (sym
->as
!= NULL
)
2033 expr
->rank
= sym
->as
->rank
;
2035 /* Type of the expression is either the type of the symbol or the
2036 default type of the symbol. */
2039 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2041 if (sym
->ts
.type
!= BT_UNKNOWN
)
2045 ts
= gfc_get_default_type (sym
->name
, sym
->ns
);
2047 if (ts
->type
== BT_UNKNOWN
)
2049 gfc_error ("Function '%s' at %L has no IMPLICIT type",
2050 sym
->name
, &expr
->where
);
2061 /* Return true, if the symbol is an external procedure. */
2063 is_external_proc (gfc_symbol
*sym
)
2065 if (!sym
->attr
.dummy
&& !sym
->attr
.contained
2066 && !(sym
->attr
.intrinsic
2067 || gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, sym
->declared_at
))
2068 && sym
->attr
.proc
!= PROC_ST_FUNCTION
2069 && !sym
->attr
.use_assoc
2077 /* Figure out if a function reference is pure or not. Also set the name
2078 of the function for a potential error message. Return nonzero if the
2079 function is PURE, zero if not. */
2081 pure_stmt_function (gfc_expr
*, gfc_symbol
*);
2084 pure_function (gfc_expr
*e
, const char **name
)
2090 if (e
->symtree
!= NULL
2091 && e
->symtree
->n
.sym
!= NULL
2092 && e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
2093 return pure_stmt_function (e
, e
->symtree
->n
.sym
);
2095 if (e
->value
.function
.esym
)
2097 pure
= gfc_pure (e
->value
.function
.esym
);
2098 *name
= e
->value
.function
.esym
->name
;
2100 else if (e
->value
.function
.isym
)
2102 pure
= e
->value
.function
.isym
->pure
2103 || e
->value
.function
.isym
->elemental
;
2104 *name
= e
->value
.function
.isym
->name
;
2108 /* Implicit functions are not pure. */
2110 *name
= e
->value
.function
.name
;
2118 impure_stmt_fcn (gfc_expr
*e
, gfc_symbol
*sym
,
2119 int *f ATTRIBUTE_UNUSED
)
2123 /* Don't bother recursing into other statement functions
2124 since they will be checked individually for purity. */
2125 if (e
->expr_type
!= EXPR_FUNCTION
2127 || e
->symtree
->n
.sym
== sym
2128 || e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
2131 return pure_function (e
, &name
) ? false : true;
2136 pure_stmt_function (gfc_expr
*e
, gfc_symbol
*sym
)
2138 return gfc_traverse_expr (e
, sym
, impure_stmt_fcn
, 0) ? 0 : 1;
2143 is_scalar_expr_ptr (gfc_expr
*expr
)
2145 gfc_try retval
= SUCCESS
;
2150 /* See if we have a gfc_ref, which means we have a substring, array
2151 reference, or a component. */
2152 if (expr
->ref
!= NULL
)
2155 while (ref
->next
!= NULL
)
2161 if (ref
->u
.ss
.length
!= NULL
2162 && ref
->u
.ss
.length
->length
!= NULL
2164 && ref
->u
.ss
.start
->expr_type
== EXPR_CONSTANT
2166 && ref
->u
.ss
.end
->expr_type
== EXPR_CONSTANT
)
2168 start
= (int) mpz_get_si (ref
->u
.ss
.start
->value
.integer
);
2169 end
= (int) mpz_get_si (ref
->u
.ss
.end
->value
.integer
);
2170 if (end
- start
+ 1 != 1)
2177 if (ref
->u
.ar
.type
== AR_ELEMENT
)
2179 else if (ref
->u
.ar
.type
== AR_FULL
)
2181 /* The user can give a full array if the array is of size 1. */
2182 if (ref
->u
.ar
.as
!= NULL
2183 && ref
->u
.ar
.as
->rank
== 1
2184 && ref
->u
.ar
.as
->type
== AS_EXPLICIT
2185 && ref
->u
.ar
.as
->lower
[0] != NULL
2186 && ref
->u
.ar
.as
->lower
[0]->expr_type
== EXPR_CONSTANT
2187 && ref
->u
.ar
.as
->upper
[0] != NULL
2188 && ref
->u
.ar
.as
->upper
[0]->expr_type
== EXPR_CONSTANT
)
2190 /* If we have a character string, we need to check if
2191 its length is one. */
2192 if (expr
->ts
.type
== BT_CHARACTER
)
2194 if (expr
->ts
.u
.cl
== NULL
2195 || expr
->ts
.u
.cl
->length
== NULL
2196 || mpz_cmp_si (expr
->ts
.u
.cl
->length
->value
.integer
, 1)
2202 /* We have constant lower and upper bounds. If the
2203 difference between is 1, it can be considered a
2205 start
= (int) mpz_get_si
2206 (ref
->u
.ar
.as
->lower
[0]->value
.integer
);
2207 end
= (int) mpz_get_si
2208 (ref
->u
.ar
.as
->upper
[0]->value
.integer
);
2209 if (end
- start
+ 1 != 1)
2224 else if (expr
->ts
.type
== BT_CHARACTER
&& expr
->rank
== 0)
2226 /* Character string. Make sure it's of length 1. */
2227 if (expr
->ts
.u
.cl
== NULL
2228 || expr
->ts
.u
.cl
->length
== NULL
2229 || mpz_cmp_si (expr
->ts
.u
.cl
->length
->value
.integer
, 1) != 0)
2232 else if (expr
->rank
!= 0)
2239 /* Match one of the iso_c_binding functions (c_associated or c_loc)
2240 and, in the case of c_associated, set the binding label based on
2244 gfc_iso_c_func_interface (gfc_symbol
*sym
, gfc_actual_arglist
*args
,
2245 gfc_symbol
**new_sym
)
2247 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
2248 char binding_label
[GFC_MAX_BINDING_LABEL_LEN
+ 1];
2249 int optional_arg
= 0, is_pointer
= 0;
2250 gfc_try retval
= SUCCESS
;
2251 gfc_symbol
*args_sym
;
2252 gfc_typespec
*arg_ts
;
2254 if (args
->expr
->expr_type
== EXPR_CONSTANT
2255 || args
->expr
->expr_type
== EXPR_OP
2256 || args
->expr
->expr_type
== EXPR_NULL
)
2258 gfc_error ("Argument to '%s' at %L is not a variable",
2259 sym
->name
, &(args
->expr
->where
));
2263 args_sym
= args
->expr
->symtree
->n
.sym
;
2265 /* The typespec for the actual arg should be that stored in the expr
2266 and not necessarily that of the expr symbol (args_sym), because
2267 the actual expression could be a part-ref of the expr symbol. */
2268 arg_ts
= &(args
->expr
->ts
);
2270 is_pointer
= gfc_is_data_pointer (args
->expr
);
2272 if (sym
->intmod_sym_id
== ISOCBINDING_ASSOCIATED
)
2274 /* If the user gave two args then they are providing something for
2275 the optional arg (the second cptr). Therefore, set the name and
2276 binding label to the c_associated for two cptrs. Otherwise,
2277 set c_associated to expect one cptr. */
2281 sprintf (name
, "%s_2", sym
->name
);
2282 sprintf (binding_label
, "%s_2", sym
->binding_label
);
2288 sprintf (name
, "%s_1", sym
->name
);
2289 sprintf (binding_label
, "%s_1", sym
->binding_label
);
2293 /* Get a new symbol for the version of c_associated that
2295 *new_sym
= get_iso_c_sym (sym
, name
, binding_label
, optional_arg
);
2297 else if (sym
->intmod_sym_id
== ISOCBINDING_LOC
2298 || sym
->intmod_sym_id
== ISOCBINDING_FUNLOC
)
2300 sprintf (name
, "%s", sym
->name
);
2301 sprintf (binding_label
, "%s", sym
->binding_label
);
2303 /* Error check the call. */
2304 if (args
->next
!= NULL
)
2306 gfc_error_now ("More actual than formal arguments in '%s' "
2307 "call at %L", name
, &(args
->expr
->where
));
2310 else if (sym
->intmod_sym_id
== ISOCBINDING_LOC
)
2312 /* Make sure we have either the target or pointer attribute. */
2313 if (!args_sym
->attr
.target
&& !is_pointer
)
2315 gfc_error_now ("Parameter '%s' to '%s' at %L must be either "
2316 "a TARGET or an associated pointer",
2318 sym
->name
, &(args
->expr
->where
));
2322 /* See if we have interoperable type and type param. */
2323 if (verify_c_interop (arg_ts
) == SUCCESS
2324 || gfc_check_any_c_kind (arg_ts
) == SUCCESS
)
2326 if (args_sym
->attr
.target
== 1)
2328 /* Case 1a, section 15.1.2.5, J3/04-007: variable that
2329 has the target attribute and is interoperable. */
2330 /* Case 1b, section 15.1.2.5, J3/04-007: allocated
2331 allocatable variable that has the TARGET attribute and
2332 is not an array of zero size. */
2333 if (args_sym
->attr
.allocatable
== 1)
2335 if (args_sym
->attr
.dimension
!= 0
2336 && (args_sym
->as
&& args_sym
->as
->rank
== 0))
2338 gfc_error_now ("Allocatable variable '%s' used as a "
2339 "parameter to '%s' at %L must not be "
2340 "an array of zero size",
2341 args_sym
->name
, sym
->name
,
2342 &(args
->expr
->where
));
2348 /* A non-allocatable target variable with C
2349 interoperable type and type parameters must be
2351 if (args_sym
&& args_sym
->attr
.dimension
)
2353 if (args_sym
->as
->type
== AS_ASSUMED_SHAPE
)
2355 gfc_error ("Assumed-shape array '%s' at %L "
2356 "cannot be an argument to the "
2357 "procedure '%s' because "
2358 "it is not C interoperable",
2360 &(args
->expr
->where
), sym
->name
);
2363 else if (args_sym
->as
->type
== AS_DEFERRED
)
2365 gfc_error ("Deferred-shape array '%s' at %L "
2366 "cannot be an argument to the "
2367 "procedure '%s' because "
2368 "it is not C interoperable",
2370 &(args
->expr
->where
), sym
->name
);
2375 /* Make sure it's not a character string. Arrays of
2376 any type should be ok if the variable is of a C
2377 interoperable type. */
2378 if (arg_ts
->type
== BT_CHARACTER
)
2379 if (arg_ts
->u
.cl
!= NULL
2380 && (arg_ts
->u
.cl
->length
== NULL
2381 || arg_ts
->u
.cl
->length
->expr_type
2384 (arg_ts
->u
.cl
->length
->value
.integer
, 1)
2386 && is_scalar_expr_ptr (args
->expr
) != SUCCESS
)
2388 gfc_error_now ("CHARACTER argument '%s' to '%s' "
2389 "at %L must have a length of 1",
2390 args_sym
->name
, sym
->name
,
2391 &(args
->expr
->where
));
2397 && is_scalar_expr_ptr (args
->expr
) != SUCCESS
)
2399 /* Case 1c, section 15.1.2.5, J3/04-007: an associated
2401 gfc_error_now ("Argument '%s' to '%s' at %L must be an "
2402 "associated scalar POINTER", args_sym
->name
,
2403 sym
->name
, &(args
->expr
->where
));
2409 /* The parameter is not required to be C interoperable. If it
2410 is not C interoperable, it must be a nonpolymorphic scalar
2411 with no length type parameters. It still must have either
2412 the pointer or target attribute, and it can be
2413 allocatable (but must be allocated when c_loc is called). */
2414 if (args
->expr
->rank
!= 0
2415 && is_scalar_expr_ptr (args
->expr
) != SUCCESS
)
2417 gfc_error_now ("Parameter '%s' to '%s' at %L must be a "
2418 "scalar", args_sym
->name
, sym
->name
,
2419 &(args
->expr
->where
));
2422 else if (arg_ts
->type
== BT_CHARACTER
2423 && is_scalar_expr_ptr (args
->expr
) != SUCCESS
)
2425 gfc_error_now ("CHARACTER argument '%s' to '%s' at "
2426 "%L must have a length of 1",
2427 args_sym
->name
, sym
->name
,
2428 &(args
->expr
->where
));
2433 else if (sym
->intmod_sym_id
== ISOCBINDING_FUNLOC
)
2435 if (args_sym
->attr
.flavor
!= FL_PROCEDURE
)
2437 /* TODO: Update this error message to allow for procedure
2438 pointers once they are implemented. */
2439 gfc_error_now ("Parameter '%s' to '%s' at %L must be a "
2441 args_sym
->name
, sym
->name
,
2442 &(args
->expr
->where
));
2445 else if (args_sym
->attr
.is_bind_c
!= 1)
2447 gfc_error_now ("Parameter '%s' to '%s' at %L must be "
2449 args_sym
->name
, sym
->name
,
2450 &(args
->expr
->where
));
2455 /* for c_loc/c_funloc, the new symbol is the same as the old one */
2460 gfc_internal_error ("gfc_iso_c_func_interface(): Unhandled "
2461 "iso_c_binding function: '%s'!\n", sym
->name
);
2468 /* Resolve a function call, which means resolving the arguments, then figuring
2469 out which entity the name refers to. */
2470 /* TODO: Check procedure arguments so that an INTENT(IN) isn't passed
2471 to INTENT(OUT) or INTENT(INOUT). */
2474 resolve_function (gfc_expr
*expr
)
2476 gfc_actual_arglist
*arg
;
2481 procedure_type p
= PROC_INTRINSIC
;
2482 bool no_formal_args
;
2486 sym
= expr
->symtree
->n
.sym
;
2488 if (sym
&& sym
->attr
.intrinsic
2489 && resolve_intrinsic (sym
, &expr
->where
) == FAILURE
)
2492 if (sym
&& (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.subroutine
))
2494 gfc_error ("'%s' at %L is not a function", sym
->name
, &expr
->where
);
2498 if (sym
&& sym
->attr
.abstract
)
2500 gfc_error ("ABSTRACT INTERFACE '%s' must not be referenced at %L",
2501 sym
->name
, &expr
->where
);
2505 /* Switch off assumed size checking and do this again for certain kinds
2506 of procedure, once the procedure itself is resolved. */
2507 need_full_assumed_size
++;
2509 if (expr
->symtree
&& expr
->symtree
->n
.sym
)
2510 p
= expr
->symtree
->n
.sym
->attr
.proc
;
2512 no_formal_args
= sym
&& is_external_proc (sym
) && sym
->formal
== NULL
;
2513 if (resolve_actual_arglist (expr
->value
.function
.actual
,
2514 p
, no_formal_args
) == FAILURE
)
2517 /* Need to setup the call to the correct c_associated, depending on
2518 the number of cptrs to user gives to compare. */
2519 if (sym
&& sym
->attr
.is_iso_c
== 1)
2521 if (gfc_iso_c_func_interface (sym
, expr
->value
.function
.actual
, &sym
)
2525 /* Get the symtree for the new symbol (resolved func).
2526 the old one will be freed later, when it's no longer used. */
2527 gfc_find_sym_tree (sym
->name
, sym
->ns
, 1, &(expr
->symtree
));
2530 /* Resume assumed_size checking. */
2531 need_full_assumed_size
--;
2533 /* If the procedure is external, check for usage. */
2534 if (sym
&& is_external_proc (sym
))
2535 resolve_global_procedure (sym
, &expr
->where
,
2536 &expr
->value
.function
.actual
, 0);
2538 if (sym
&& sym
->ts
.type
== BT_CHARACTER
2540 && sym
->ts
.u
.cl
->length
== NULL
2542 && expr
->value
.function
.esym
== NULL
2543 && !sym
->attr
.contained
)
2545 /* Internal procedures are taken care of in resolve_contained_fntype. */
2546 gfc_error ("Function '%s' is declared CHARACTER(*) and cannot "
2547 "be used at %L since it is not a dummy argument",
2548 sym
->name
, &expr
->where
);
2552 /* See if function is already resolved. */
2554 if (expr
->value
.function
.name
!= NULL
)
2556 if (expr
->ts
.type
== BT_UNKNOWN
)
2562 /* Apply the rules of section 14.1.2. */
2564 switch (procedure_kind (sym
))
2567 t
= resolve_generic_f (expr
);
2570 case PTYPE_SPECIFIC
:
2571 t
= resolve_specific_f (expr
);
2575 t
= resolve_unknown_f (expr
);
2579 gfc_internal_error ("resolve_function(): bad function type");
2583 /* If the expression is still a function (it might have simplified),
2584 then we check to see if we are calling an elemental function. */
2586 if (expr
->expr_type
!= EXPR_FUNCTION
)
2589 temp
= need_full_assumed_size
;
2590 need_full_assumed_size
= 0;
2592 if (resolve_elemental_actual (expr
, NULL
) == FAILURE
)
2595 if (omp_workshare_flag
2596 && expr
->value
.function
.esym
2597 && ! gfc_elemental (expr
->value
.function
.esym
))
2599 gfc_error ("User defined non-ELEMENTAL function '%s' at %L not allowed "
2600 "in WORKSHARE construct", expr
->value
.function
.esym
->name
,
2605 #define GENERIC_ID expr->value.function.isym->id
2606 else if (expr
->value
.function
.actual
!= NULL
2607 && expr
->value
.function
.isym
!= NULL
2608 && GENERIC_ID
!= GFC_ISYM_LBOUND
2609 && GENERIC_ID
!= GFC_ISYM_LEN
2610 && GENERIC_ID
!= GFC_ISYM_LOC
2611 && GENERIC_ID
!= GFC_ISYM_PRESENT
)
2613 /* Array intrinsics must also have the last upper bound of an
2614 assumed size array argument. UBOUND and SIZE have to be
2615 excluded from the check if the second argument is anything
2618 for (arg
= expr
->value
.function
.actual
; arg
; arg
= arg
->next
)
2620 if ((GENERIC_ID
== GFC_ISYM_UBOUND
|| GENERIC_ID
== GFC_ISYM_SIZE
)
2621 && arg
->next
!= NULL
&& arg
->next
->expr
)
2623 if (arg
->next
->expr
->expr_type
!= EXPR_CONSTANT
)
2626 if (arg
->next
->name
&& strncmp(arg
->next
->name
, "kind", 4) == 0)
2629 if ((int)mpz_get_si (arg
->next
->expr
->value
.integer
)
2634 if (arg
->expr
!= NULL
2635 && arg
->expr
->rank
> 0
2636 && resolve_assumed_size_actual (arg
->expr
))
2642 need_full_assumed_size
= temp
;
2645 if (!pure_function (expr
, &name
) && name
)
2649 gfc_error ("reference to non-PURE function '%s' at %L inside a "
2650 "FORALL %s", name
, &expr
->where
,
2651 forall_flag
== 2 ? "mask" : "block");
2654 else if (gfc_pure (NULL
))
2656 gfc_error ("Function reference to '%s' at %L is to a non-PURE "
2657 "procedure within a PURE procedure", name
, &expr
->where
);
2662 /* Functions without the RECURSIVE attribution are not allowed to
2663 * call themselves. */
2664 if (expr
->value
.function
.esym
&& !expr
->value
.function
.esym
->attr
.recursive
)
2667 esym
= expr
->value
.function
.esym
;
2669 if (is_illegal_recursion (esym
, gfc_current_ns
))
2671 if (esym
->attr
.entry
&& esym
->ns
->entries
)
2672 gfc_error ("ENTRY '%s' at %L cannot be called recursively, as"
2673 " function '%s' is not RECURSIVE",
2674 esym
->name
, &expr
->where
, esym
->ns
->entries
->sym
->name
);
2676 gfc_error ("Function '%s' at %L cannot be called recursively, as it"
2677 " is not RECURSIVE", esym
->name
, &expr
->where
);
2683 /* Character lengths of use associated functions may contains references to
2684 symbols not referenced from the current program unit otherwise. Make sure
2685 those symbols are marked as referenced. */
2687 if (expr
->ts
.type
== BT_CHARACTER
&& expr
->value
.function
.esym
2688 && expr
->value
.function
.esym
->attr
.use_assoc
)
2690 gfc_expr_set_symbols_referenced (expr
->ts
.u
.cl
->length
);
2694 && !((expr
->value
.function
.esym
2695 && expr
->value
.function
.esym
->attr
.elemental
)
2697 (expr
->value
.function
.isym
2698 && expr
->value
.function
.isym
->elemental
)))
2699 find_noncopying_intrinsics (expr
->value
.function
.esym
,
2700 expr
->value
.function
.actual
);
2702 /* Make sure that the expression has a typespec that works. */
2703 if (expr
->ts
.type
== BT_UNKNOWN
)
2705 if (expr
->symtree
->n
.sym
->result
2706 && expr
->symtree
->n
.sym
->result
->ts
.type
!= BT_UNKNOWN
2707 && !expr
->symtree
->n
.sym
->result
->attr
.proc_pointer
)
2708 expr
->ts
= expr
->symtree
->n
.sym
->result
->ts
;
2715 /************* Subroutine resolution *************/
2718 pure_subroutine (gfc_code
*c
, gfc_symbol
*sym
)
2724 gfc_error ("Subroutine call to '%s' in FORALL block at %L is not PURE",
2725 sym
->name
, &c
->loc
);
2726 else if (gfc_pure (NULL
))
2727 gfc_error ("Subroutine call to '%s' at %L is not PURE", sym
->name
,
2733 resolve_generic_s0 (gfc_code
*c
, gfc_symbol
*sym
)
2737 if (sym
->attr
.generic
)
2739 s
= gfc_search_interface (sym
->generic
, 1, &c
->ext
.actual
);
2742 c
->resolved_sym
= s
;
2743 pure_subroutine (c
, s
);
2747 /* TODO: Need to search for elemental references in generic interface. */
2750 if (sym
->attr
.intrinsic
)
2751 return gfc_intrinsic_sub_interface (c
, 0);
2758 resolve_generic_s (gfc_code
*c
)
2763 sym
= c
->symtree
->n
.sym
;
2767 m
= resolve_generic_s0 (c
, sym
);
2770 else if (m
== MATCH_ERROR
)
2774 if (sym
->ns
->parent
== NULL
)
2776 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2780 if (!generic_sym (sym
))
2784 /* Last ditch attempt. See if the reference is to an intrinsic
2785 that possesses a matching interface. 14.1.2.4 */
2786 sym
= c
->symtree
->n
.sym
;
2788 if (!gfc_is_intrinsic (sym
, 1, c
->loc
))
2790 gfc_error ("There is no specific subroutine for the generic '%s' at %L",
2791 sym
->name
, &c
->loc
);
2795 m
= gfc_intrinsic_sub_interface (c
, 0);
2799 gfc_error ("Generic subroutine '%s' at %L is not consistent with an "
2800 "intrinsic subroutine interface", sym
->name
, &c
->loc
);
2806 /* Set the name and binding label of the subroutine symbol in the call
2807 expression represented by 'c' to include the type and kind of the
2808 second parameter. This function is for resolving the appropriate
2809 version of c_f_pointer() and c_f_procpointer(). For example, a
2810 call to c_f_pointer() for a default integer pointer could have a
2811 name of c_f_pointer_i4. If no second arg exists, which is an error
2812 for these two functions, it defaults to the generic symbol's name
2813 and binding label. */
2816 set_name_and_label (gfc_code
*c
, gfc_symbol
*sym
,
2817 char *name
, char *binding_label
)
2819 gfc_expr
*arg
= NULL
;
2823 /* The second arg of c_f_pointer and c_f_procpointer determines
2824 the type and kind for the procedure name. */
2825 arg
= c
->ext
.actual
->next
->expr
;
2829 /* Set up the name to have the given symbol's name,
2830 plus the type and kind. */
2831 /* a derived type is marked with the type letter 'u' */
2832 if (arg
->ts
.type
== BT_DERIVED
)
2835 kind
= 0; /* set the kind as 0 for now */
2839 type
= gfc_type_letter (arg
->ts
.type
);
2840 kind
= arg
->ts
.kind
;
2843 if (arg
->ts
.type
== BT_CHARACTER
)
2844 /* Kind info for character strings not needed. */
2847 sprintf (name
, "%s_%c%d", sym
->name
, type
, kind
);
2848 /* Set up the binding label as the given symbol's label plus
2849 the type and kind. */
2850 sprintf (binding_label
, "%s_%c%d", sym
->binding_label
, type
, kind
);
2854 /* If the second arg is missing, set the name and label as
2855 was, cause it should at least be found, and the missing
2856 arg error will be caught by compare_parameters(). */
2857 sprintf (name
, "%s", sym
->name
);
2858 sprintf (binding_label
, "%s", sym
->binding_label
);
2865 /* Resolve a generic version of the iso_c_binding procedure given
2866 (sym) to the specific one based on the type and kind of the
2867 argument(s). Currently, this function resolves c_f_pointer() and
2868 c_f_procpointer based on the type and kind of the second argument
2869 (FPTR). Other iso_c_binding procedures aren't specially handled.
2870 Upon successfully exiting, c->resolved_sym will hold the resolved
2871 symbol. Returns MATCH_ERROR if an error occurred; MATCH_YES
2875 gfc_iso_c_sub_interface (gfc_code
*c
, gfc_symbol
*sym
)
2877 gfc_symbol
*new_sym
;
2878 /* this is fine, since we know the names won't use the max */
2879 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
2880 char binding_label
[GFC_MAX_BINDING_LABEL_LEN
+ 1];
2881 /* default to success; will override if find error */
2882 match m
= MATCH_YES
;
2884 /* Make sure the actual arguments are in the necessary order (based on the
2885 formal args) before resolving. */
2886 gfc_procedure_use (sym
, &c
->ext
.actual
, &(c
->loc
));
2888 if ((sym
->intmod_sym_id
== ISOCBINDING_F_POINTER
) ||
2889 (sym
->intmod_sym_id
== ISOCBINDING_F_PROCPOINTER
))
2891 set_name_and_label (c
, sym
, name
, binding_label
);
2893 if (sym
->intmod_sym_id
== ISOCBINDING_F_POINTER
)
2895 if (c
->ext
.actual
!= NULL
&& c
->ext
.actual
->next
!= NULL
)
2897 /* Make sure we got a third arg if the second arg has non-zero
2898 rank. We must also check that the type and rank are
2899 correct since we short-circuit this check in
2900 gfc_procedure_use() (called above to sort actual args). */
2901 if (c
->ext
.actual
->next
->expr
->rank
!= 0)
2903 if(c
->ext
.actual
->next
->next
== NULL
2904 || c
->ext
.actual
->next
->next
->expr
== NULL
)
2907 gfc_error ("Missing SHAPE parameter for call to %s "
2908 "at %L", sym
->name
, &(c
->loc
));
2910 else if (c
->ext
.actual
->next
->next
->expr
->ts
.type
2912 || c
->ext
.actual
->next
->next
->expr
->rank
!= 1)
2915 gfc_error ("SHAPE parameter for call to %s at %L must "
2916 "be a rank 1 INTEGER array", sym
->name
,
2923 if (m
!= MATCH_ERROR
)
2925 /* the 1 means to add the optional arg to formal list */
2926 new_sym
= get_iso_c_sym (sym
, name
, binding_label
, 1);
2928 /* for error reporting, say it's declared where the original was */
2929 new_sym
->declared_at
= sym
->declared_at
;
2934 /* no differences for c_loc or c_funloc */
2938 /* set the resolved symbol */
2939 if (m
!= MATCH_ERROR
)
2940 c
->resolved_sym
= new_sym
;
2942 c
->resolved_sym
= sym
;
2948 /* Resolve a subroutine call known to be specific. */
2951 resolve_specific_s0 (gfc_code
*c
, gfc_symbol
*sym
)
2955 if(sym
->attr
.is_iso_c
)
2957 m
= gfc_iso_c_sub_interface (c
,sym
);
2961 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
2963 if (sym
->attr
.dummy
)
2965 sym
->attr
.proc
= PROC_DUMMY
;
2969 sym
->attr
.proc
= PROC_EXTERNAL
;
2973 if (sym
->attr
.proc
== PROC_MODULE
|| sym
->attr
.proc
== PROC_INTERNAL
)
2976 if (sym
->attr
.intrinsic
)
2978 m
= gfc_intrinsic_sub_interface (c
, 1);
2982 gfc_error ("Subroutine '%s' at %L is INTRINSIC but is not compatible "
2983 "with an intrinsic", sym
->name
, &c
->loc
);
2991 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
2993 c
->resolved_sym
= sym
;
2994 pure_subroutine (c
, sym
);
3001 resolve_specific_s (gfc_code
*c
)
3006 sym
= c
->symtree
->n
.sym
;
3010 m
= resolve_specific_s0 (c
, sym
);
3013 if (m
== MATCH_ERROR
)
3016 if (sym
->ns
->parent
== NULL
)
3019 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3025 sym
= c
->symtree
->n
.sym
;
3026 gfc_error ("Unable to resolve the specific subroutine '%s' at %L",
3027 sym
->name
, &c
->loc
);
3033 /* Resolve a subroutine call not known to be generic nor specific. */
3036 resolve_unknown_s (gfc_code
*c
)
3040 sym
= c
->symtree
->n
.sym
;
3042 if (sym
->attr
.dummy
)
3044 sym
->attr
.proc
= PROC_DUMMY
;
3048 /* See if we have an intrinsic function reference. */
3050 if (gfc_is_intrinsic (sym
, 1, c
->loc
))
3052 if (gfc_intrinsic_sub_interface (c
, 1) == MATCH_YES
)
3057 /* The reference is to an external name. */
3060 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3062 c
->resolved_sym
= sym
;
3064 pure_subroutine (c
, sym
);
3070 /* Resolve a subroutine call. Although it was tempting to use the same code
3071 for functions, subroutines and functions are stored differently and this
3072 makes things awkward. */
3075 resolve_call (gfc_code
*c
)
3078 procedure_type ptype
= PROC_INTRINSIC
;
3079 gfc_symbol
*csym
, *sym
;
3080 bool no_formal_args
;
3082 csym
= c
->symtree
? c
->symtree
->n
.sym
: NULL
;
3084 if (csym
&& csym
->ts
.type
!= BT_UNKNOWN
)
3086 gfc_error ("'%s' at %L has a type, which is not consistent with "
3087 "the CALL at %L", csym
->name
, &csym
->declared_at
, &c
->loc
);
3091 if (csym
&& gfc_current_ns
->parent
&& csym
->ns
!= gfc_current_ns
)
3094 gfc_find_sym_tree (csym
->name
, gfc_current_ns
, 1, &st
);
3095 sym
= st
? st
->n
.sym
: NULL
;
3096 if (sym
&& csym
!= sym
3097 && sym
->ns
== gfc_current_ns
3098 && sym
->attr
.flavor
== FL_PROCEDURE
3099 && sym
->attr
.contained
)
3102 if (csym
->attr
.generic
)
3103 c
->symtree
->n
.sym
= sym
;
3106 csym
= c
->symtree
->n
.sym
;
3110 /* Subroutines without the RECURSIVE attribution are not allowed to
3111 * call themselves. */
3112 if (csym
&& is_illegal_recursion (csym
, gfc_current_ns
))
3114 if (csym
->attr
.entry
&& csym
->ns
->entries
)
3115 gfc_error ("ENTRY '%s' at %L cannot be called recursively, as"
3116 " subroutine '%s' is not RECURSIVE",
3117 csym
->name
, &c
->loc
, csym
->ns
->entries
->sym
->name
);
3119 gfc_error ("SUBROUTINE '%s' at %L cannot be called recursively, as it"
3120 " is not RECURSIVE", csym
->name
, &c
->loc
);
3125 /* Switch off assumed size checking and do this again for certain kinds
3126 of procedure, once the procedure itself is resolved. */
3127 need_full_assumed_size
++;
3130 ptype
= csym
->attr
.proc
;
3132 no_formal_args
= csym
&& is_external_proc (csym
) && csym
->formal
== NULL
;
3133 if (resolve_actual_arglist (c
->ext
.actual
, ptype
,
3134 no_formal_args
) == FAILURE
)
3137 /* Resume assumed_size checking. */
3138 need_full_assumed_size
--;
3140 /* If external, check for usage. */
3141 if (csym
&& is_external_proc (csym
))
3142 resolve_global_procedure (csym
, &c
->loc
, &c
->ext
.actual
, 1);
3145 if (c
->resolved_sym
== NULL
)
3147 c
->resolved_isym
= NULL
;
3148 switch (procedure_kind (csym
))
3151 t
= resolve_generic_s (c
);
3154 case PTYPE_SPECIFIC
:
3155 t
= resolve_specific_s (c
);
3159 t
= resolve_unknown_s (c
);
3163 gfc_internal_error ("resolve_subroutine(): bad function type");
3167 /* Some checks of elemental subroutine actual arguments. */
3168 if (resolve_elemental_actual (NULL
, c
) == FAILURE
)
3171 if (t
== SUCCESS
&& !(c
->resolved_sym
&& c
->resolved_sym
->attr
.elemental
))
3172 find_noncopying_intrinsics (c
->resolved_sym
, c
->ext
.actual
);
3177 /* Compare the shapes of two arrays that have non-NULL shapes. If both
3178 op1->shape and op2->shape are non-NULL return SUCCESS if their shapes
3179 match. If both op1->shape and op2->shape are non-NULL return FAILURE
3180 if their shapes do not match. If either op1->shape or op2->shape is
3181 NULL, return SUCCESS. */
3184 compare_shapes (gfc_expr
*op1
, gfc_expr
*op2
)
3191 if (op1
->shape
!= NULL
&& op2
->shape
!= NULL
)
3193 for (i
= 0; i
< op1
->rank
; i
++)
3195 if (mpz_cmp (op1
->shape
[i
], op2
->shape
[i
]) != 0)
3197 gfc_error ("Shapes for operands at %L and %L are not conformable",
3198 &op1
->where
, &op2
->where
);
3209 /* Resolve an operator expression node. This can involve replacing the
3210 operation with a user defined function call. */
3213 resolve_operator (gfc_expr
*e
)
3215 gfc_expr
*op1
, *op2
;
3217 bool dual_locus_error
;
3220 /* Resolve all subnodes-- give them types. */
3222 switch (e
->value
.op
.op
)
3225 if (gfc_resolve_expr (e
->value
.op
.op2
) == FAILURE
)
3228 /* Fall through... */
3231 case INTRINSIC_UPLUS
:
3232 case INTRINSIC_UMINUS
:
3233 case INTRINSIC_PARENTHESES
:
3234 if (gfc_resolve_expr (e
->value
.op
.op1
) == FAILURE
)
3239 /* Typecheck the new node. */
3241 op1
= e
->value
.op
.op1
;
3242 op2
= e
->value
.op
.op2
;
3243 dual_locus_error
= false;
3245 if ((op1
&& op1
->expr_type
== EXPR_NULL
)
3246 || (op2
&& op2
->expr_type
== EXPR_NULL
))
3248 sprintf (msg
, _("Invalid context for NULL() pointer at %%L"));
3252 switch (e
->value
.op
.op
)
3254 case INTRINSIC_UPLUS
:
3255 case INTRINSIC_UMINUS
:
3256 if (op1
->ts
.type
== BT_INTEGER
3257 || op1
->ts
.type
== BT_REAL
3258 || op1
->ts
.type
== BT_COMPLEX
)
3264 sprintf (msg
, _("Operand of unary numeric operator '%s' at %%L is %s"),
3265 gfc_op2string (e
->value
.op
.op
), gfc_typename (&e
->ts
));
3268 case INTRINSIC_PLUS
:
3269 case INTRINSIC_MINUS
:
3270 case INTRINSIC_TIMES
:
3271 case INTRINSIC_DIVIDE
:
3272 case INTRINSIC_POWER
:
3273 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
3275 gfc_type_convert_binary (e
);
3280 _("Operands of binary numeric operator '%s' at %%L are %s/%s"),
3281 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
3282 gfc_typename (&op2
->ts
));
3285 case INTRINSIC_CONCAT
:
3286 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
3287 && op1
->ts
.kind
== op2
->ts
.kind
)
3289 e
->ts
.type
= BT_CHARACTER
;
3290 e
->ts
.kind
= op1
->ts
.kind
;
3295 _("Operands of string concatenation operator at %%L are %s/%s"),
3296 gfc_typename (&op1
->ts
), gfc_typename (&op2
->ts
));
3302 case INTRINSIC_NEQV
:
3303 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
3305 e
->ts
.type
= BT_LOGICAL
;
3306 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
3307 if (op1
->ts
.kind
< e
->ts
.kind
)
3308 gfc_convert_type (op1
, &e
->ts
, 2);
3309 else if (op2
->ts
.kind
< e
->ts
.kind
)
3310 gfc_convert_type (op2
, &e
->ts
, 2);
3314 sprintf (msg
, _("Operands of logical operator '%s' at %%L are %s/%s"),
3315 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
3316 gfc_typename (&op2
->ts
));
3321 if (op1
->ts
.type
== BT_LOGICAL
)
3323 e
->ts
.type
= BT_LOGICAL
;
3324 e
->ts
.kind
= op1
->ts
.kind
;
3328 sprintf (msg
, _("Operand of .not. operator at %%L is %s"),
3329 gfc_typename (&op1
->ts
));
3333 case INTRINSIC_GT_OS
:
3335 case INTRINSIC_GE_OS
:
3337 case INTRINSIC_LT_OS
:
3339 case INTRINSIC_LE_OS
:
3340 if (op1
->ts
.type
== BT_COMPLEX
|| op2
->ts
.type
== BT_COMPLEX
)
3342 strcpy (msg
, _("COMPLEX quantities cannot be compared at %L"));
3346 /* Fall through... */
3349 case INTRINSIC_EQ_OS
:
3351 case INTRINSIC_NE_OS
:
3352 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
3353 && op1
->ts
.kind
== op2
->ts
.kind
)
3355 e
->ts
.type
= BT_LOGICAL
;
3356 e
->ts
.kind
= gfc_default_logical_kind
;
3360 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
3362 gfc_type_convert_binary (e
);
3364 e
->ts
.type
= BT_LOGICAL
;
3365 e
->ts
.kind
= gfc_default_logical_kind
;
3369 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
3371 _("Logicals at %%L must be compared with %s instead of %s"),
3372 (e
->value
.op
.op
== INTRINSIC_EQ
3373 || e
->value
.op
.op
== INTRINSIC_EQ_OS
)
3374 ? ".eqv." : ".neqv.", gfc_op2string (e
->value
.op
.op
));
3377 _("Operands of comparison operator '%s' at %%L are %s/%s"),
3378 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
3379 gfc_typename (&op2
->ts
));
3383 case INTRINSIC_USER
:
3384 if (e
->value
.op
.uop
->op
== NULL
)
3385 sprintf (msg
, _("Unknown operator '%s' at %%L"), e
->value
.op
.uop
->name
);
3386 else if (op2
== NULL
)
3387 sprintf (msg
, _("Operand of user operator '%s' at %%L is %s"),
3388 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
));
3390 sprintf (msg
, _("Operands of user operator '%s' at %%L are %s/%s"),
3391 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
),
3392 gfc_typename (&op2
->ts
));
3396 case INTRINSIC_PARENTHESES
:
3398 if (e
->ts
.type
== BT_CHARACTER
)
3399 e
->ts
.u
.cl
= op1
->ts
.u
.cl
;
3403 gfc_internal_error ("resolve_operator(): Bad intrinsic");
3406 /* Deal with arrayness of an operand through an operator. */
3410 switch (e
->value
.op
.op
)
3412 case INTRINSIC_PLUS
:
3413 case INTRINSIC_MINUS
:
3414 case INTRINSIC_TIMES
:
3415 case INTRINSIC_DIVIDE
:
3416 case INTRINSIC_POWER
:
3417 case INTRINSIC_CONCAT
:
3421 case INTRINSIC_NEQV
:
3423 case INTRINSIC_EQ_OS
:
3425 case INTRINSIC_NE_OS
:
3427 case INTRINSIC_GT_OS
:
3429 case INTRINSIC_GE_OS
:
3431 case INTRINSIC_LT_OS
:
3433 case INTRINSIC_LE_OS
:
3435 if (op1
->rank
== 0 && op2
->rank
== 0)
3438 if (op1
->rank
== 0 && op2
->rank
!= 0)
3440 e
->rank
= op2
->rank
;
3442 if (e
->shape
== NULL
)
3443 e
->shape
= gfc_copy_shape (op2
->shape
, op2
->rank
);
3446 if (op1
->rank
!= 0 && op2
->rank
== 0)
3448 e
->rank
= op1
->rank
;
3450 if (e
->shape
== NULL
)
3451 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
3454 if (op1
->rank
!= 0 && op2
->rank
!= 0)
3456 if (op1
->rank
== op2
->rank
)
3458 e
->rank
= op1
->rank
;
3459 if (e
->shape
== NULL
)
3461 t
= compare_shapes(op1
, op2
);
3465 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
3470 /* Allow higher level expressions to work. */
3473 /* Try user-defined operators, and otherwise throw an error. */
3474 dual_locus_error
= true;
3476 _("Inconsistent ranks for operator at %%L and %%L"));
3483 case INTRINSIC_PARENTHESES
:
3485 case INTRINSIC_UPLUS
:
3486 case INTRINSIC_UMINUS
:
3487 /* Simply copy arrayness attribute */
3488 e
->rank
= op1
->rank
;
3490 if (e
->shape
== NULL
)
3491 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
3499 /* Attempt to simplify the expression. */
3502 t
= gfc_simplify_expr (e
, 0);
3503 /* Some calls do not succeed in simplification and return FAILURE
3504 even though there is no error; e.g. variable references to
3505 PARAMETER arrays. */
3506 if (!gfc_is_constant_expr (e
))
3513 if (gfc_extend_expr (e
) == SUCCESS
)
3516 if (dual_locus_error
)
3517 gfc_error (msg
, &op1
->where
, &op2
->where
);
3519 gfc_error (msg
, &e
->where
);
3525 /************** Array resolution subroutines **************/
3528 { CMP_LT
, CMP_EQ
, CMP_GT
, CMP_UNKNOWN
}
3531 /* Compare two integer expressions. */
3534 compare_bound (gfc_expr
*a
, gfc_expr
*b
)
3538 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
3539 || b
== NULL
|| b
->expr_type
!= EXPR_CONSTANT
)
3542 /* If either of the types isn't INTEGER, we must have
3543 raised an error earlier. */
3545 if (a
->ts
.type
!= BT_INTEGER
|| b
->ts
.type
!= BT_INTEGER
)
3548 i
= mpz_cmp (a
->value
.integer
, b
->value
.integer
);
3558 /* Compare an integer expression with an integer. */
3561 compare_bound_int (gfc_expr
*a
, int b
)
3565 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
3568 if (a
->ts
.type
!= BT_INTEGER
)
3569 gfc_internal_error ("compare_bound_int(): Bad expression");
3571 i
= mpz_cmp_si (a
->value
.integer
, b
);
3581 /* Compare an integer expression with a mpz_t. */
3584 compare_bound_mpz_t (gfc_expr
*a
, mpz_t b
)
3588 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
3591 if (a
->ts
.type
!= BT_INTEGER
)
3592 gfc_internal_error ("compare_bound_int(): Bad expression");
3594 i
= mpz_cmp (a
->value
.integer
, b
);
3604 /* Compute the last value of a sequence given by a triplet.
3605 Return 0 if it wasn't able to compute the last value, or if the
3606 sequence if empty, and 1 otherwise. */
3609 compute_last_value_for_triplet (gfc_expr
*start
, gfc_expr
*end
,
3610 gfc_expr
*stride
, mpz_t last
)
3614 if (start
== NULL
|| start
->expr_type
!= EXPR_CONSTANT
3615 || end
== NULL
|| end
->expr_type
!= EXPR_CONSTANT
3616 || (stride
!= NULL
&& stride
->expr_type
!= EXPR_CONSTANT
))
3619 if (start
->ts
.type
!= BT_INTEGER
|| end
->ts
.type
!= BT_INTEGER
3620 || (stride
!= NULL
&& stride
->ts
.type
!= BT_INTEGER
))
3623 if (stride
== NULL
|| compare_bound_int(stride
, 1) == CMP_EQ
)
3625 if (compare_bound (start
, end
) == CMP_GT
)
3627 mpz_set (last
, end
->value
.integer
);
3631 if (compare_bound_int (stride
, 0) == CMP_GT
)
3633 /* Stride is positive */
3634 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) > 0)
3639 /* Stride is negative */
3640 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) < 0)
3645 mpz_sub (rem
, end
->value
.integer
, start
->value
.integer
);
3646 mpz_tdiv_r (rem
, rem
, stride
->value
.integer
);
3647 mpz_sub (last
, end
->value
.integer
, rem
);
3654 /* Compare a single dimension of an array reference to the array
3658 check_dimension (int i
, gfc_array_ref
*ar
, gfc_array_spec
*as
)
3662 /* Given start, end and stride values, calculate the minimum and
3663 maximum referenced indexes. */
3665 switch (ar
->dimen_type
[i
])
3671 if (compare_bound (ar
->start
[i
], as
->lower
[i
]) == CMP_LT
)
3673 gfc_warning ("Array reference at %L is out of bounds "
3674 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
3675 mpz_get_si (ar
->start
[i
]->value
.integer
),
3676 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
3679 if (compare_bound (ar
->start
[i
], as
->upper
[i
]) == CMP_GT
)
3681 gfc_warning ("Array reference at %L is out of bounds "
3682 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
3683 mpz_get_si (ar
->start
[i
]->value
.integer
),
3684 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
3692 #define AR_START (ar->start[i] ? ar->start[i] : as->lower[i])
3693 #define AR_END (ar->end[i] ? ar->end[i] : as->upper[i])
3695 comparison comp_start_end
= compare_bound (AR_START
, AR_END
);
3697 /* Check for zero stride, which is not allowed. */
3698 if (compare_bound_int (ar
->stride
[i
], 0) == CMP_EQ
)
3700 gfc_error ("Illegal stride of zero at %L", &ar
->c_where
[i
]);
3704 /* if start == len || (stride > 0 && start < len)
3705 || (stride < 0 && start > len),
3706 then the array section contains at least one element. In this
3707 case, there is an out-of-bounds access if
3708 (start < lower || start > upper). */
3709 if (compare_bound (AR_START
, AR_END
) == CMP_EQ
3710 || ((compare_bound_int (ar
->stride
[i
], 0) == CMP_GT
3711 || ar
->stride
[i
] == NULL
) && comp_start_end
== CMP_LT
)
3712 || (compare_bound_int (ar
->stride
[i
], 0) == CMP_LT
3713 && comp_start_end
== CMP_GT
))
3715 if (compare_bound (AR_START
, as
->lower
[i
]) == CMP_LT
)
3717 gfc_warning ("Lower array reference at %L is out of bounds "
3718 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
3719 mpz_get_si (AR_START
->value
.integer
),
3720 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
3723 if (compare_bound (AR_START
, as
->upper
[i
]) == CMP_GT
)
3725 gfc_warning ("Lower array reference at %L is out of bounds "
3726 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
3727 mpz_get_si (AR_START
->value
.integer
),
3728 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
3733 /* If we can compute the highest index of the array section,
3734 then it also has to be between lower and upper. */
3735 mpz_init (last_value
);
3736 if (compute_last_value_for_triplet (AR_START
, AR_END
, ar
->stride
[i
],
3739 if (compare_bound_mpz_t (as
->lower
[i
], last_value
) == CMP_GT
)
3741 gfc_warning ("Upper array reference at %L is out of bounds "
3742 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
3743 mpz_get_si (last_value
),
3744 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
3745 mpz_clear (last_value
);
3748 if (compare_bound_mpz_t (as
->upper
[i
], last_value
) == CMP_LT
)
3750 gfc_warning ("Upper array reference at %L is out of bounds "
3751 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
3752 mpz_get_si (last_value
),
3753 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
3754 mpz_clear (last_value
);
3758 mpz_clear (last_value
);
3766 gfc_internal_error ("check_dimension(): Bad array reference");
3773 /* Compare an array reference with an array specification. */
3776 compare_spec_to_ref (gfc_array_ref
*ar
)
3783 /* TODO: Full array sections are only allowed as actual parameters. */
3784 if (as
->type
== AS_ASSUMED_SIZE
3785 && (/*ar->type == AR_FULL
3786 ||*/ (ar
->type
== AR_SECTION
3787 && ar
->dimen_type
[i
] == DIMEN_RANGE
&& ar
->end
[i
] == NULL
)))
3789 gfc_error ("Rightmost upper bound of assumed size array section "
3790 "not specified at %L", &ar
->where
);
3794 if (ar
->type
== AR_FULL
)
3797 if (as
->rank
!= ar
->dimen
)
3799 gfc_error ("Rank mismatch in array reference at %L (%d/%d)",
3800 &ar
->where
, ar
->dimen
, as
->rank
);
3804 for (i
= 0; i
< as
->rank
; i
++)
3805 if (check_dimension (i
, ar
, as
) == FAILURE
)
3812 /* Resolve one part of an array index. */
3815 gfc_resolve_index (gfc_expr
*index
, int check_scalar
)
3822 if (gfc_resolve_expr (index
) == FAILURE
)
3825 if (check_scalar
&& index
->rank
!= 0)
3827 gfc_error ("Array index at %L must be scalar", &index
->where
);
3831 if (index
->ts
.type
!= BT_INTEGER
&& index
->ts
.type
!= BT_REAL
)
3833 gfc_error ("Array index at %L must be of INTEGER type, found %s",
3834 &index
->where
, gfc_basic_typename (index
->ts
.type
));
3838 if (index
->ts
.type
== BT_REAL
)
3839 if (gfc_notify_std (GFC_STD_LEGACY
, "Extension: REAL array index at %L",
3840 &index
->where
) == FAILURE
)
3843 if (index
->ts
.kind
!= gfc_index_integer_kind
3844 || index
->ts
.type
!= BT_INTEGER
)
3847 ts
.type
= BT_INTEGER
;
3848 ts
.kind
= gfc_index_integer_kind
;
3850 gfc_convert_type_warn (index
, &ts
, 2, 0);
3856 /* Resolve a dim argument to an intrinsic function. */
3859 gfc_resolve_dim_arg (gfc_expr
*dim
)
3864 if (gfc_resolve_expr (dim
) == FAILURE
)
3869 gfc_error ("Argument dim at %L must be scalar", &dim
->where
);
3874 if (dim
->ts
.type
!= BT_INTEGER
)
3876 gfc_error ("Argument dim at %L must be of INTEGER type", &dim
->where
);
3880 if (dim
->ts
.kind
!= gfc_index_integer_kind
)
3884 ts
.type
= BT_INTEGER
;
3885 ts
.kind
= gfc_index_integer_kind
;
3887 gfc_convert_type_warn (dim
, &ts
, 2, 0);
3893 /* Given an expression that contains array references, update those array
3894 references to point to the right array specifications. While this is
3895 filled in during matching, this information is difficult to save and load
3896 in a module, so we take care of it here.
3898 The idea here is that the original array reference comes from the
3899 base symbol. We traverse the list of reference structures, setting
3900 the stored reference to references. Component references can
3901 provide an additional array specification. */
3904 find_array_spec (gfc_expr
*e
)
3908 gfc_symbol
*derived
;
3911 as
= e
->symtree
->n
.sym
->as
;
3914 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
3919 gfc_internal_error ("find_array_spec(): Missing spec");
3926 if (derived
== NULL
)
3927 derived
= e
->symtree
->n
.sym
->ts
.u
.derived
;
3929 c
= derived
->components
;
3931 for (; c
; c
= c
->next
)
3932 if (c
== ref
->u
.c
.component
)
3934 /* Track the sequence of component references. */
3935 if (c
->ts
.type
== BT_DERIVED
)
3936 derived
= c
->ts
.u
.derived
;
3941 gfc_internal_error ("find_array_spec(): Component not found");
3943 if (c
->attr
.dimension
)
3946 gfc_internal_error ("find_array_spec(): unused as(1)");
3957 gfc_internal_error ("find_array_spec(): unused as(2)");
3961 /* Resolve an array reference. */
3964 resolve_array_ref (gfc_array_ref
*ar
)
3966 int i
, check_scalar
;
3969 for (i
= 0; i
< ar
->dimen
; i
++)
3971 check_scalar
= ar
->dimen_type
[i
] == DIMEN_RANGE
;
3973 if (gfc_resolve_index (ar
->start
[i
], check_scalar
) == FAILURE
)
3975 if (gfc_resolve_index (ar
->end
[i
], check_scalar
) == FAILURE
)
3977 if (gfc_resolve_index (ar
->stride
[i
], check_scalar
) == FAILURE
)
3982 if (ar
->dimen_type
[i
] == DIMEN_UNKNOWN
)
3986 ar
->dimen_type
[i
] = DIMEN_ELEMENT
;
3990 ar
->dimen_type
[i
] = DIMEN_VECTOR
;
3991 if (e
->expr_type
== EXPR_VARIABLE
3992 && e
->symtree
->n
.sym
->ts
.type
== BT_DERIVED
)
3993 ar
->start
[i
] = gfc_get_parentheses (e
);
3997 gfc_error ("Array index at %L is an array of rank %d",
3998 &ar
->c_where
[i
], e
->rank
);
4003 /* If the reference type is unknown, figure out what kind it is. */
4005 if (ar
->type
== AR_UNKNOWN
)
4007 ar
->type
= AR_ELEMENT
;
4008 for (i
= 0; i
< ar
->dimen
; i
++)
4009 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4010 || ar
->dimen_type
[i
] == DIMEN_VECTOR
)
4012 ar
->type
= AR_SECTION
;
4017 if (!ar
->as
->cray_pointee
&& compare_spec_to_ref (ar
) == FAILURE
)
4025 resolve_substring (gfc_ref
*ref
)
4027 int k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
4029 if (ref
->u
.ss
.start
!= NULL
)
4031 if (gfc_resolve_expr (ref
->u
.ss
.start
) == FAILURE
)
4034 if (ref
->u
.ss
.start
->ts
.type
!= BT_INTEGER
)
4036 gfc_error ("Substring start index at %L must be of type INTEGER",
4037 &ref
->u
.ss
.start
->where
);
4041 if (ref
->u
.ss
.start
->rank
!= 0)
4043 gfc_error ("Substring start index at %L must be scalar",
4044 &ref
->u
.ss
.start
->where
);
4048 if (compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_LT
4049 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4050 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4052 gfc_error ("Substring start index at %L is less than one",
4053 &ref
->u
.ss
.start
->where
);
4058 if (ref
->u
.ss
.end
!= NULL
)
4060 if (gfc_resolve_expr (ref
->u
.ss
.end
) == FAILURE
)
4063 if (ref
->u
.ss
.end
->ts
.type
!= BT_INTEGER
)
4065 gfc_error ("Substring end index at %L must be of type INTEGER",
4066 &ref
->u
.ss
.end
->where
);
4070 if (ref
->u
.ss
.end
->rank
!= 0)
4072 gfc_error ("Substring end index at %L must be scalar",
4073 &ref
->u
.ss
.end
->where
);
4077 if (ref
->u
.ss
.length
!= NULL
4078 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_GT
4079 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4080 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4082 gfc_error ("Substring end index at %L exceeds the string length",
4083 &ref
->u
.ss
.start
->where
);
4087 if (compare_bound_mpz_t (ref
->u
.ss
.end
,
4088 gfc_integer_kinds
[k
].huge
) == CMP_GT
4089 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4090 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4092 gfc_error ("Substring end index at %L is too large",
4093 &ref
->u
.ss
.end
->where
);
4102 /* This function supplies missing substring charlens. */
4105 gfc_resolve_substring_charlen (gfc_expr
*e
)
4108 gfc_expr
*start
, *end
;
4110 for (char_ref
= e
->ref
; char_ref
; char_ref
= char_ref
->next
)
4111 if (char_ref
->type
== REF_SUBSTRING
)
4117 gcc_assert (char_ref
->next
== NULL
);
4121 if (e
->ts
.u
.cl
->length
)
4122 gfc_free_expr (e
->ts
.u
.cl
->length
);
4123 else if (e
->expr_type
== EXPR_VARIABLE
4124 && e
->symtree
->n
.sym
->attr
.dummy
)
4128 e
->ts
.type
= BT_CHARACTER
;
4129 e
->ts
.kind
= gfc_default_character_kind
;
4132 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
4134 if (char_ref
->u
.ss
.start
)
4135 start
= gfc_copy_expr (char_ref
->u
.ss
.start
);
4137 start
= gfc_int_expr (1);
4139 if (char_ref
->u
.ss
.end
)
4140 end
= gfc_copy_expr (char_ref
->u
.ss
.end
);
4141 else if (e
->expr_type
== EXPR_VARIABLE
)
4142 end
= gfc_copy_expr (e
->symtree
->n
.sym
->ts
.u
.cl
->length
);
4149 /* Length = (end - start +1). */
4150 e
->ts
.u
.cl
->length
= gfc_subtract (end
, start
);
4151 e
->ts
.u
.cl
->length
= gfc_add (e
->ts
.u
.cl
->length
, gfc_int_expr (1));
4153 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
4154 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
4156 /* Make sure that the length is simplified. */
4157 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 1);
4158 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
4162 /* Resolve subtype references. */
4165 resolve_ref (gfc_expr
*expr
)
4167 int current_part_dimension
, n_components
, seen_part_dimension
;
4170 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
4171 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.as
== NULL
)
4173 find_array_spec (expr
);
4177 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
4181 if (resolve_array_ref (&ref
->u
.ar
) == FAILURE
)
4189 resolve_substring (ref
);
4193 /* Check constraints on part references. */
4195 current_part_dimension
= 0;
4196 seen_part_dimension
= 0;
4199 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
4204 switch (ref
->u
.ar
.type
)
4208 current_part_dimension
= 1;
4212 current_part_dimension
= 0;
4216 gfc_internal_error ("resolve_ref(): Bad array reference");
4222 if (current_part_dimension
|| seen_part_dimension
)
4224 if (ref
->u
.c
.component
->attr
.pointer
)
4226 gfc_error ("Component to the right of a part reference "
4227 "with nonzero rank must not have the POINTER "
4228 "attribute at %L", &expr
->where
);
4231 else if (ref
->u
.c
.component
->attr
.allocatable
)
4233 gfc_error ("Component to the right of a part reference "
4234 "with nonzero rank must not have the ALLOCATABLE "
4235 "attribute at %L", &expr
->where
);
4247 if (((ref
->type
== REF_COMPONENT
&& n_components
> 1)
4248 || ref
->next
== NULL
)
4249 && current_part_dimension
4250 && seen_part_dimension
)
4252 gfc_error ("Two or more part references with nonzero rank must "
4253 "not be specified at %L", &expr
->where
);
4257 if (ref
->type
== REF_COMPONENT
)
4259 if (current_part_dimension
)
4260 seen_part_dimension
= 1;
4262 /* reset to make sure */
4263 current_part_dimension
= 0;
4271 /* Given an expression, determine its shape. This is easier than it sounds.
4272 Leaves the shape array NULL if it is not possible to determine the shape. */
4275 expression_shape (gfc_expr
*e
)
4277 mpz_t array
[GFC_MAX_DIMENSIONS
];
4280 if (e
->rank
== 0 || e
->shape
!= NULL
)
4283 for (i
= 0; i
< e
->rank
; i
++)
4284 if (gfc_array_dimen_size (e
, i
, &array
[i
]) == FAILURE
)
4287 e
->shape
= gfc_get_shape (e
->rank
);
4289 memcpy (e
->shape
, array
, e
->rank
* sizeof (mpz_t
));
4294 for (i
--; i
>= 0; i
--)
4295 mpz_clear (array
[i
]);
4299 /* Given a variable expression node, compute the rank of the expression by
4300 examining the base symbol and any reference structures it may have. */
4303 expression_rank (gfc_expr
*e
)
4308 /* Just to make sure, because EXPR_COMPCALL's also have an e->ref and that
4309 could lead to serious confusion... */
4310 gcc_assert (e
->expr_type
!= EXPR_COMPCALL
);
4314 if (e
->expr_type
== EXPR_ARRAY
)
4316 /* Constructors can have a rank different from one via RESHAPE(). */
4318 if (e
->symtree
== NULL
)
4324 e
->rank
= (e
->symtree
->n
.sym
->as
== NULL
)
4325 ? 0 : e
->symtree
->n
.sym
->as
->rank
;
4331 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4333 if (ref
->type
!= REF_ARRAY
)
4336 if (ref
->u
.ar
.type
== AR_FULL
)
4338 rank
= ref
->u
.ar
.as
->rank
;
4342 if (ref
->u
.ar
.type
== AR_SECTION
)
4344 /* Figure out the rank of the section. */
4346 gfc_internal_error ("expression_rank(): Two array specs");
4348 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
4349 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_RANGE
4350 || ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
)
4360 expression_shape (e
);
4364 /* Resolve a variable expression. */
4367 resolve_variable (gfc_expr
*e
)
4374 if (e
->symtree
== NULL
)
4377 if (e
->ref
&& resolve_ref (e
) == FAILURE
)
4380 sym
= e
->symtree
->n
.sym
;
4381 if (sym
->attr
.flavor
== FL_PROCEDURE
4382 && (!sym
->attr
.function
4383 || (sym
->attr
.function
&& sym
->result
4384 && sym
->result
->attr
.proc_pointer
4385 && !sym
->result
->attr
.function
)))
4387 e
->ts
.type
= BT_PROCEDURE
;
4388 goto resolve_procedure
;
4391 if (sym
->ts
.type
!= BT_UNKNOWN
)
4392 gfc_variable_attr (e
, &e
->ts
);
4395 /* Must be a simple variable reference. */
4396 if (gfc_set_default_type (sym
, 1, sym
->ns
) == FAILURE
)
4401 if (check_assumed_size_reference (sym
, e
))
4404 /* Deal with forward references to entries during resolve_code, to
4405 satisfy, at least partially, 12.5.2.5. */
4406 if (gfc_current_ns
->entries
4407 && current_entry_id
== sym
->entry_id
4410 && cs_base
->current
->op
!= EXEC_ENTRY
)
4412 gfc_entry_list
*entry
;
4413 gfc_formal_arglist
*formal
;
4417 /* If the symbol is a dummy... */
4418 if (sym
->attr
.dummy
&& sym
->ns
== gfc_current_ns
)
4420 entry
= gfc_current_ns
->entries
;
4423 /* ...test if the symbol is a parameter of previous entries. */
4424 for (; entry
&& entry
->id
<= current_entry_id
; entry
= entry
->next
)
4425 for (formal
= entry
->sym
->formal
; formal
; formal
= formal
->next
)
4427 if (formal
->sym
&& sym
->name
== formal
->sym
->name
)
4431 /* If it has not been seen as a dummy, this is an error. */
4434 if (specification_expr
)
4435 gfc_error ("Variable '%s', used in a specification expression"
4436 ", is referenced at %L before the ENTRY statement "
4437 "in which it is a parameter",
4438 sym
->name
, &cs_base
->current
->loc
);
4440 gfc_error ("Variable '%s' is used at %L before the ENTRY "
4441 "statement in which it is a parameter",
4442 sym
->name
, &cs_base
->current
->loc
);
4447 /* Now do the same check on the specification expressions. */
4448 specification_expr
= 1;
4449 if (sym
->ts
.type
== BT_CHARACTER
4450 && gfc_resolve_expr (sym
->ts
.u
.cl
->length
) == FAILURE
)
4454 for (n
= 0; n
< sym
->as
->rank
; n
++)
4456 specification_expr
= 1;
4457 if (gfc_resolve_expr (sym
->as
->lower
[n
]) == FAILURE
)
4459 specification_expr
= 1;
4460 if (gfc_resolve_expr (sym
->as
->upper
[n
]) == FAILURE
)
4463 specification_expr
= 0;
4466 /* Update the symbol's entry level. */
4467 sym
->entry_id
= current_entry_id
+ 1;
4471 if (t
== SUCCESS
&& resolve_procedure_expression (e
) == FAILURE
)
4478 /* Checks to see that the correct symbol has been host associated.
4479 The only situation where this arises is that in which a twice
4480 contained function is parsed after the host association is made.
4481 Therefore, on detecting this, change the symbol in the expression
4482 and convert the array reference into an actual arglist if the old
4483 symbol is a variable. */
4485 check_host_association (gfc_expr
*e
)
4487 gfc_symbol
*sym
, *old_sym
;
4491 gfc_actual_arglist
*arg
, *tail
= NULL
;
4492 bool retval
= e
->expr_type
== EXPR_FUNCTION
;
4494 /* If the expression is the result of substitution in
4495 interface.c(gfc_extend_expr) because there is no way in
4496 which the host association can be wrong. */
4497 if (e
->symtree
== NULL
4498 || e
->symtree
->n
.sym
== NULL
4499 || e
->user_operator
)
4502 old_sym
= e
->symtree
->n
.sym
;
4504 if (gfc_current_ns
->parent
4505 && old_sym
->ns
!= gfc_current_ns
)
4507 /* Use the 'USE' name so that renamed module symbols are
4508 correctly handled. */
4509 gfc_find_symbol (e
->symtree
->name
, gfc_current_ns
, 1, &sym
);
4511 if (sym
&& old_sym
!= sym
4512 && sym
->ts
.type
== old_sym
->ts
.type
4513 && sym
->attr
.flavor
== FL_PROCEDURE
4514 && sym
->attr
.contained
)
4516 /* Clear the shape, since it might not be valid. */
4517 if (e
->shape
!= NULL
)
4519 for (n
= 0; n
< e
->rank
; n
++)
4520 mpz_clear (e
->shape
[n
]);
4522 gfc_free (e
->shape
);
4525 /* Give the expression the right symtree! */
4526 gfc_find_sym_tree (e
->symtree
->name
, NULL
, 1, &st
);
4527 gcc_assert (st
!= NULL
);
4529 if (old_sym
->attr
.flavor
== FL_PROCEDURE
4530 || e
->expr_type
== EXPR_FUNCTION
)
4532 /* Original was function so point to the new symbol, since
4533 the actual argument list is already attached to the
4535 e
->value
.function
.esym
= NULL
;
4540 /* Original was variable so convert array references into
4541 an actual arglist. This does not need any checking now
4542 since gfc_resolve_function will take care of it. */
4543 e
->value
.function
.actual
= NULL
;
4544 e
->expr_type
= EXPR_FUNCTION
;
4547 /* Ambiguity will not arise if the array reference is not
4548 the last reference. */
4549 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4550 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
4553 gcc_assert (ref
->type
== REF_ARRAY
);
4555 /* Grab the start expressions from the array ref and
4556 copy them into actual arguments. */
4557 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
4559 arg
= gfc_get_actual_arglist ();
4560 arg
->expr
= gfc_copy_expr (ref
->u
.ar
.start
[n
]);
4561 if (e
->value
.function
.actual
== NULL
)
4562 tail
= e
->value
.function
.actual
= arg
;
4570 /* Dump the reference list and set the rank. */
4571 gfc_free_ref_list (e
->ref
);
4573 e
->rank
= sym
->as
? sym
->as
->rank
: 0;
4576 gfc_resolve_expr (e
);
4580 /* This might have changed! */
4581 return e
->expr_type
== EXPR_FUNCTION
;
4586 gfc_resolve_character_operator (gfc_expr
*e
)
4588 gfc_expr
*op1
= e
->value
.op
.op1
;
4589 gfc_expr
*op2
= e
->value
.op
.op2
;
4590 gfc_expr
*e1
= NULL
;
4591 gfc_expr
*e2
= NULL
;
4593 gcc_assert (e
->value
.op
.op
== INTRINSIC_CONCAT
);
4595 if (op1
->ts
.u
.cl
&& op1
->ts
.u
.cl
->length
)
4596 e1
= gfc_copy_expr (op1
->ts
.u
.cl
->length
);
4597 else if (op1
->expr_type
== EXPR_CONSTANT
)
4598 e1
= gfc_int_expr (op1
->value
.character
.length
);
4600 if (op2
->ts
.u
.cl
&& op2
->ts
.u
.cl
->length
)
4601 e2
= gfc_copy_expr (op2
->ts
.u
.cl
->length
);
4602 else if (op2
->expr_type
== EXPR_CONSTANT
)
4603 e2
= gfc_int_expr (op2
->value
.character
.length
);
4605 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
4610 e
->ts
.u
.cl
->length
= gfc_add (e1
, e2
);
4611 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
4612 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
4613 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 0);
4614 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
4620 /* Ensure that an character expression has a charlen and, if possible, a
4621 length expression. */
4624 fixup_charlen (gfc_expr
*e
)
4626 /* The cases fall through so that changes in expression type and the need
4627 for multiple fixes are picked up. In all circumstances, a charlen should
4628 be available for the middle end to hang a backend_decl on. */
4629 switch (e
->expr_type
)
4632 gfc_resolve_character_operator (e
);
4635 if (e
->expr_type
== EXPR_ARRAY
)
4636 gfc_resolve_character_array_constructor (e
);
4638 case EXPR_SUBSTRING
:
4639 if (!e
->ts
.u
.cl
&& e
->ref
)
4640 gfc_resolve_substring_charlen (e
);
4644 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
4651 /* Update an actual argument to include the passed-object for type-bound
4652 procedures at the right position. */
4654 static gfc_actual_arglist
*
4655 update_arglist_pass (gfc_actual_arglist
* lst
, gfc_expr
* po
, unsigned argpos
,
4658 gcc_assert (argpos
> 0);
4662 gfc_actual_arglist
* result
;
4664 result
= gfc_get_actual_arglist ();
4668 result
->name
= name
;
4674 lst
->next
= update_arglist_pass (lst
->next
, po
, argpos
- 1, name
);
4676 lst
= update_arglist_pass (NULL
, po
, argpos
- 1, name
);
4681 /* Extract the passed-object from an EXPR_COMPCALL (a copy of it). */
4684 extract_compcall_passed_object (gfc_expr
* e
)
4688 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
4690 po
= gfc_get_expr ();
4691 po
->expr_type
= EXPR_VARIABLE
;
4692 po
->symtree
= e
->symtree
;
4693 po
->ref
= gfc_copy_ref (e
->ref
);
4695 if (gfc_resolve_expr (po
) == FAILURE
)
4702 /* Update the arglist of an EXPR_COMPCALL expression to include the
4706 update_compcall_arglist (gfc_expr
* e
)
4709 gfc_typebound_proc
* tbp
;
4711 tbp
= e
->value
.compcall
.tbp
;
4716 po
= extract_compcall_passed_object (e
);
4722 gfc_error ("Passed-object at %L must be scalar", &e
->where
);
4732 gcc_assert (tbp
->pass_arg_num
> 0);
4733 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
4741 /* Extract the passed object from a PPC call (a copy of it). */
4744 extract_ppc_passed_object (gfc_expr
*e
)
4749 po
= gfc_get_expr ();
4750 po
->expr_type
= EXPR_VARIABLE
;
4751 po
->symtree
= e
->symtree
;
4752 po
->ref
= gfc_copy_ref (e
->ref
);
4754 /* Remove PPC reference. */
4756 while ((*ref
)->next
)
4757 (*ref
) = (*ref
)->next
;
4758 gfc_free_ref_list (*ref
);
4761 if (gfc_resolve_expr (po
) == FAILURE
)
4768 /* Update the actual arglist of a procedure pointer component to include the
4772 update_ppc_arglist (gfc_expr
* e
)
4776 gfc_typebound_proc
* tb
;
4778 if (!gfc_is_proc_ptr_comp (e
, &ppc
))
4785 else if (tb
->nopass
)
4788 po
= extract_ppc_passed_object (e
);
4794 gfc_error ("Passed-object at %L must be scalar", &e
->where
);
4798 gcc_assert (tb
->pass_arg_num
> 0);
4799 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
4807 /* Check that the object a TBP is called on is valid, i.e. it must not be
4808 of ABSTRACT type (as in subobject%abstract_parent%tbp()). */
4811 check_typebound_baseobject (gfc_expr
* e
)
4815 base
= extract_compcall_passed_object (e
);
4819 gcc_assert (base
->ts
.type
== BT_DERIVED
);
4820 if (base
->ts
.u
.derived
->attr
.abstract
)
4822 gfc_error ("Base object for type-bound procedure call at %L is of"
4823 " ABSTRACT type '%s'", &e
->where
, base
->ts
.u
.derived
->name
);
4831 /* Resolve a call to a type-bound procedure, either function or subroutine,
4832 statically from the data in an EXPR_COMPCALL expression. The adapted
4833 arglist and the target-procedure symtree are returned. */
4836 resolve_typebound_static (gfc_expr
* e
, gfc_symtree
** target
,
4837 gfc_actual_arglist
** actual
)
4839 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
4840 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
4842 /* Update the actual arglist for PASS. */
4843 if (update_compcall_arglist (e
) == FAILURE
)
4846 *actual
= e
->value
.compcall
.actual
;
4847 *target
= e
->value
.compcall
.tbp
->u
.specific
;
4849 gfc_free_ref_list (e
->ref
);
4851 e
->value
.compcall
.actual
= NULL
;
4857 /* Given an EXPR_COMPCALL calling a GENERIC typebound procedure, figure out
4858 which of the specific bindings (if any) matches the arglist and transform
4859 the expression into a call of that binding. */
4862 resolve_typebound_generic_call (gfc_expr
* e
)
4864 gfc_typebound_proc
* genproc
;
4865 const char* genname
;
4867 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
4868 genname
= e
->value
.compcall
.name
;
4869 genproc
= e
->value
.compcall
.tbp
;
4871 if (!genproc
->is_generic
)
4874 /* Try the bindings on this type and in the inheritance hierarchy. */
4875 for (; genproc
; genproc
= genproc
->overridden
)
4879 gcc_assert (genproc
->is_generic
);
4880 for (g
= genproc
->u
.generic
; g
; g
= g
->next
)
4883 gfc_actual_arglist
* args
;
4886 gcc_assert (g
->specific
);
4888 if (g
->specific
->error
)
4891 target
= g
->specific
->u
.specific
->n
.sym
;
4893 /* Get the right arglist by handling PASS/NOPASS. */
4894 args
= gfc_copy_actual_arglist (e
->value
.compcall
.actual
);
4895 if (!g
->specific
->nopass
)
4898 po
= extract_compcall_passed_object (e
);
4902 gcc_assert (g
->specific
->pass_arg_num
> 0);
4903 gcc_assert (!g
->specific
->error
);
4904 args
= update_arglist_pass (args
, po
, g
->specific
->pass_arg_num
,
4905 g
->specific
->pass_arg
);
4907 resolve_actual_arglist (args
, target
->attr
.proc
,
4908 is_external_proc (target
) && !target
->formal
);
4910 /* Check if this arglist matches the formal. */
4911 matches
= gfc_arglist_matches_symbol (&args
, target
);
4913 /* Clean up and break out of the loop if we've found it. */
4914 gfc_free_actual_arglist (args
);
4917 e
->value
.compcall
.tbp
= g
->specific
;
4923 /* Nothing matching found! */
4924 gfc_error ("Found no matching specific binding for the call to the GENERIC"
4925 " '%s' at %L", genname
, &e
->where
);
4933 /* Resolve a call to a type-bound subroutine. */
4936 resolve_typebound_call (gfc_code
* c
)
4938 gfc_actual_arglist
* newactual
;
4939 gfc_symtree
* target
;
4941 /* Check that's really a SUBROUTINE. */
4942 if (!c
->expr1
->value
.compcall
.tbp
->subroutine
)
4944 gfc_error ("'%s' at %L should be a SUBROUTINE",
4945 c
->expr1
->value
.compcall
.name
, &c
->loc
);
4949 if (check_typebound_baseobject (c
->expr1
) == FAILURE
)
4952 if (resolve_typebound_generic_call (c
->expr1
) == FAILURE
)
4955 /* Transform into an ordinary EXEC_CALL for now. */
4957 if (resolve_typebound_static (c
->expr1
, &target
, &newactual
) == FAILURE
)
4960 c
->ext
.actual
= newactual
;
4961 c
->symtree
= target
;
4964 gcc_assert (!c
->expr1
->ref
&& !c
->expr1
->value
.compcall
.actual
);
4965 gfc_free_expr (c
->expr1
);
4968 return resolve_call (c
);
4972 /* Resolve a component-call expression. */
4975 resolve_compcall (gfc_expr
* e
)
4977 gfc_actual_arglist
* newactual
;
4978 gfc_symtree
* target
;
4980 /* Check that's really a FUNCTION. */
4981 if (!e
->value
.compcall
.tbp
->function
)
4983 gfc_error ("'%s' at %L should be a FUNCTION",
4984 e
->value
.compcall
.name
, &e
->where
);
4988 if (check_typebound_baseobject (e
) == FAILURE
)
4991 if (resolve_typebound_generic_call (e
) == FAILURE
)
4993 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
4995 /* Take the rank from the function's symbol. */
4996 if (e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
)
4997 e
->rank
= e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
->rank
;
4999 /* For now, we simply transform it into an EXPR_FUNCTION call with the same
5000 arglist to the TBP's binding target. */
5002 if (resolve_typebound_static (e
, &target
, &newactual
) == FAILURE
)
5005 e
->value
.function
.actual
= newactual
;
5006 e
->value
.function
.name
= e
->value
.compcall
.name
;
5007 e
->value
.function
.esym
= target
->n
.sym
;
5008 e
->value
.function
.isym
= NULL
;
5009 e
->symtree
= target
;
5010 e
->ts
= target
->n
.sym
->ts
;
5011 e
->expr_type
= EXPR_FUNCTION
;
5013 return gfc_resolve_expr (e
);
5017 /* Resolve a CALL to a Procedure Pointer Component (Subroutine). */
5020 resolve_ppc_call (gfc_code
* c
)
5022 gfc_component
*comp
;
5023 gcc_assert (gfc_is_proc_ptr_comp (c
->expr1
, &comp
));
5025 c
->resolved_sym
= c
->expr1
->symtree
->n
.sym
;
5026 c
->expr1
->expr_type
= EXPR_VARIABLE
;
5028 if (!comp
->attr
.subroutine
)
5029 gfc_add_subroutine (&comp
->attr
, comp
->name
, &c
->expr1
->where
);
5031 if (resolve_ref (c
->expr1
) == FAILURE
)
5034 if (update_ppc_arglist (c
->expr1
) == FAILURE
)
5037 c
->ext
.actual
= c
->expr1
->value
.compcall
.actual
;
5039 if (resolve_actual_arglist (c
->ext
.actual
, comp
->attr
.proc
,
5040 comp
->formal
== NULL
) == FAILURE
)
5043 gfc_ppc_use (comp
, &c
->expr1
->value
.compcall
.actual
, &c
->expr1
->where
);
5049 /* Resolve a Function Call to a Procedure Pointer Component (Function). */
5052 resolve_expr_ppc (gfc_expr
* e
)
5054 gfc_component
*comp
;
5055 gcc_assert (gfc_is_proc_ptr_comp (e
, &comp
));
5057 /* Convert to EXPR_FUNCTION. */
5058 e
->expr_type
= EXPR_FUNCTION
;
5059 e
->value
.function
.isym
= NULL
;
5060 e
->value
.function
.actual
= e
->value
.compcall
.actual
;
5062 if (comp
->as
!= NULL
)
5063 e
->rank
= comp
->as
->rank
;
5065 if (!comp
->attr
.function
)
5066 gfc_add_function (&comp
->attr
, comp
->name
, &e
->where
);
5068 if (resolve_ref (e
) == FAILURE
)
5071 if (resolve_actual_arglist (e
->value
.function
.actual
, comp
->attr
.proc
,
5072 comp
->formal
== NULL
) == FAILURE
)
5075 if (update_ppc_arglist (e
) == FAILURE
)
5078 gfc_ppc_use (comp
, &e
->value
.compcall
.actual
, &e
->where
);
5084 /* Resolve an expression. That is, make sure that types of operands agree
5085 with their operators, intrinsic operators are converted to function calls
5086 for overloaded types and unresolved function references are resolved. */
5089 gfc_resolve_expr (gfc_expr
*e
)
5096 switch (e
->expr_type
)
5099 t
= resolve_operator (e
);
5105 if (check_host_association (e
))
5106 t
= resolve_function (e
);
5109 t
= resolve_variable (e
);
5111 expression_rank (e
);
5114 if (e
->ts
.type
== BT_CHARACTER
&& e
->ts
.u
.cl
== NULL
&& e
->ref
5115 && e
->ref
->type
!= REF_SUBSTRING
)
5116 gfc_resolve_substring_charlen (e
);
5121 t
= resolve_compcall (e
);
5124 case EXPR_SUBSTRING
:
5125 t
= resolve_ref (e
);
5134 t
= resolve_expr_ppc (e
);
5139 if (resolve_ref (e
) == FAILURE
)
5142 t
= gfc_resolve_array_constructor (e
);
5143 /* Also try to expand a constructor. */
5146 expression_rank (e
);
5147 gfc_expand_constructor (e
);
5150 /* This provides the opportunity for the length of constructors with
5151 character valued function elements to propagate the string length
5152 to the expression. */
5153 if (t
== SUCCESS
&& e
->ts
.type
== BT_CHARACTER
)
5154 t
= gfc_resolve_character_array_constructor (e
);
5158 case EXPR_STRUCTURE
:
5159 t
= resolve_ref (e
);
5163 t
= resolve_structure_cons (e
);
5167 t
= gfc_simplify_expr (e
, 0);
5171 gfc_internal_error ("gfc_resolve_expr(): Bad expression type");
5174 if (e
->ts
.type
== BT_CHARACTER
&& t
== SUCCESS
&& !e
->ts
.u
.cl
)
5181 /* Resolve an expression from an iterator. They must be scalar and have
5182 INTEGER or (optionally) REAL type. */
5185 gfc_resolve_iterator_expr (gfc_expr
*expr
, bool real_ok
,
5186 const char *name_msgid
)
5188 if (gfc_resolve_expr (expr
) == FAILURE
)
5191 if (expr
->rank
!= 0)
5193 gfc_error ("%s at %L must be a scalar", _(name_msgid
), &expr
->where
);
5197 if (expr
->ts
.type
!= BT_INTEGER
)
5199 if (expr
->ts
.type
== BT_REAL
)
5202 return gfc_notify_std (GFC_STD_F95_DEL
,
5203 "Deleted feature: %s at %L must be integer",
5204 _(name_msgid
), &expr
->where
);
5207 gfc_error ("%s at %L must be INTEGER", _(name_msgid
),
5214 gfc_error ("%s at %L must be INTEGER", _(name_msgid
), &expr
->where
);
5222 /* Resolve the expressions in an iterator structure. If REAL_OK is
5223 false allow only INTEGER type iterators, otherwise allow REAL types. */
5226 gfc_resolve_iterator (gfc_iterator
*iter
, bool real_ok
)
5228 if (gfc_resolve_iterator_expr (iter
->var
, real_ok
, "Loop variable")
5232 if (gfc_pure (NULL
) && gfc_impure_variable (iter
->var
->symtree
->n
.sym
))
5234 gfc_error ("Cannot assign to loop variable in PURE procedure at %L",
5239 if (gfc_resolve_iterator_expr (iter
->start
, real_ok
,
5240 "Start expression in DO loop") == FAILURE
)
5243 if (gfc_resolve_iterator_expr (iter
->end
, real_ok
,
5244 "End expression in DO loop") == FAILURE
)
5247 if (gfc_resolve_iterator_expr (iter
->step
, real_ok
,
5248 "Step expression in DO loop") == FAILURE
)
5251 if (iter
->step
->expr_type
== EXPR_CONSTANT
)
5253 if ((iter
->step
->ts
.type
== BT_INTEGER
5254 && mpz_cmp_ui (iter
->step
->value
.integer
, 0) == 0)
5255 || (iter
->step
->ts
.type
== BT_REAL
5256 && mpfr_sgn (iter
->step
->value
.real
) == 0))
5258 gfc_error ("Step expression in DO loop at %L cannot be zero",
5259 &iter
->step
->where
);
5264 /* Convert start, end, and step to the same type as var. */
5265 if (iter
->start
->ts
.kind
!= iter
->var
->ts
.kind
5266 || iter
->start
->ts
.type
!= iter
->var
->ts
.type
)
5267 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 2);
5269 if (iter
->end
->ts
.kind
!= iter
->var
->ts
.kind
5270 || iter
->end
->ts
.type
!= iter
->var
->ts
.type
)
5271 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 2);
5273 if (iter
->step
->ts
.kind
!= iter
->var
->ts
.kind
5274 || iter
->step
->ts
.type
!= iter
->var
->ts
.type
)
5275 gfc_convert_type (iter
->step
, &iter
->var
->ts
, 2);
5277 if (iter
->start
->expr_type
== EXPR_CONSTANT
5278 && iter
->end
->expr_type
== EXPR_CONSTANT
5279 && iter
->step
->expr_type
== EXPR_CONSTANT
)
5282 if (iter
->start
->ts
.type
== BT_INTEGER
)
5284 sgn
= mpz_cmp_ui (iter
->step
->value
.integer
, 0);
5285 cmp
= mpz_cmp (iter
->end
->value
.integer
, iter
->start
->value
.integer
);
5289 sgn
= mpfr_sgn (iter
->step
->value
.real
);
5290 cmp
= mpfr_cmp (iter
->end
->value
.real
, iter
->start
->value
.real
);
5292 if ((sgn
> 0 && cmp
< 0) || (sgn
< 0 && cmp
> 0))
5293 gfc_warning ("DO loop at %L will be executed zero times",
5294 &iter
->step
->where
);
5301 /* Traversal function for find_forall_index. f == 2 signals that
5302 that variable itself is not to be checked - only the references. */
5305 forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int *f
)
5307 if (expr
->expr_type
!= EXPR_VARIABLE
)
5310 /* A scalar assignment */
5311 if (!expr
->ref
|| *f
== 1)
5313 if (expr
->symtree
->n
.sym
== sym
)
5325 /* Check whether the FORALL index appears in the expression or not.
5326 Returns SUCCESS if SYM is found in EXPR. */
5329 find_forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int f
)
5331 if (gfc_traverse_expr (expr
, sym
, forall_index
, f
))
5338 /* Resolve a list of FORALL iterators. The FORALL index-name is constrained
5339 to be a scalar INTEGER variable. The subscripts and stride are scalar
5340 INTEGERs, and if stride is a constant it must be nonzero.
5341 Furthermore "A subscript or stride in a forall-triplet-spec shall
5342 not contain a reference to any index-name in the
5343 forall-triplet-spec-list in which it appears." (7.5.4.1) */
5346 resolve_forall_iterators (gfc_forall_iterator
*it
)
5348 gfc_forall_iterator
*iter
, *iter2
;
5350 for (iter
= it
; iter
; iter
= iter
->next
)
5352 if (gfc_resolve_expr (iter
->var
) == SUCCESS
5353 && (iter
->var
->ts
.type
!= BT_INTEGER
|| iter
->var
->rank
!= 0))
5354 gfc_error ("FORALL index-name at %L must be a scalar INTEGER",
5357 if (gfc_resolve_expr (iter
->start
) == SUCCESS
5358 && (iter
->start
->ts
.type
!= BT_INTEGER
|| iter
->start
->rank
!= 0))
5359 gfc_error ("FORALL start expression at %L must be a scalar INTEGER",
5360 &iter
->start
->where
);
5361 if (iter
->var
->ts
.kind
!= iter
->start
->ts
.kind
)
5362 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 2);
5364 if (gfc_resolve_expr (iter
->end
) == SUCCESS
5365 && (iter
->end
->ts
.type
!= BT_INTEGER
|| iter
->end
->rank
!= 0))
5366 gfc_error ("FORALL end expression at %L must be a scalar INTEGER",
5368 if (iter
->var
->ts
.kind
!= iter
->end
->ts
.kind
)
5369 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 2);
5371 if (gfc_resolve_expr (iter
->stride
) == SUCCESS
)
5373 if (iter
->stride
->ts
.type
!= BT_INTEGER
|| iter
->stride
->rank
!= 0)
5374 gfc_error ("FORALL stride expression at %L must be a scalar %s",
5375 &iter
->stride
->where
, "INTEGER");
5377 if (iter
->stride
->expr_type
== EXPR_CONSTANT
5378 && mpz_cmp_ui(iter
->stride
->value
.integer
, 0) == 0)
5379 gfc_error ("FORALL stride expression at %L cannot be zero",
5380 &iter
->stride
->where
);
5382 if (iter
->var
->ts
.kind
!= iter
->stride
->ts
.kind
)
5383 gfc_convert_type (iter
->stride
, &iter
->var
->ts
, 2);
5386 for (iter
= it
; iter
; iter
= iter
->next
)
5387 for (iter2
= iter
; iter2
; iter2
= iter2
->next
)
5389 if (find_forall_index (iter2
->start
,
5390 iter
->var
->symtree
->n
.sym
, 0) == SUCCESS
5391 || find_forall_index (iter2
->end
,
5392 iter
->var
->symtree
->n
.sym
, 0) == SUCCESS
5393 || find_forall_index (iter2
->stride
,
5394 iter
->var
->symtree
->n
.sym
, 0) == SUCCESS
)
5395 gfc_error ("FORALL index '%s' may not appear in triplet "
5396 "specification at %L", iter
->var
->symtree
->name
,
5397 &iter2
->start
->where
);
5402 /* Given a pointer to a symbol that is a derived type, see if it's
5403 inaccessible, i.e. if it's defined in another module and the components are
5404 PRIVATE. The search is recursive if necessary. Returns zero if no
5405 inaccessible components are found, nonzero otherwise. */
5408 derived_inaccessible (gfc_symbol
*sym
)
5412 if (sym
->attr
.use_assoc
&& sym
->attr
.private_comp
)
5415 for (c
= sym
->components
; c
; c
= c
->next
)
5417 if (c
->ts
.type
== BT_DERIVED
&& derived_inaccessible (c
->ts
.u
.derived
))
5425 /* Resolve the argument of a deallocate expression. The expression must be
5426 a pointer or a full array. */
5429 resolve_deallocate_expr (gfc_expr
*e
)
5431 symbol_attribute attr
;
5432 int allocatable
, pointer
, check_intent_in
;
5435 /* Check INTENT(IN), unless the object is a sub-component of a pointer. */
5436 check_intent_in
= 1;
5438 if (gfc_resolve_expr (e
) == FAILURE
)
5441 if (e
->expr_type
!= EXPR_VARIABLE
)
5444 allocatable
= e
->symtree
->n
.sym
->attr
.allocatable
;
5445 pointer
= e
->symtree
->n
.sym
->attr
.pointer
;
5446 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5449 check_intent_in
= 0;
5454 if (ref
->u
.ar
.type
!= AR_FULL
)
5459 allocatable
= (ref
->u
.c
.component
->as
!= NULL
5460 && ref
->u
.c
.component
->as
->type
== AS_DEFERRED
);
5461 pointer
= ref
->u
.c
.component
->attr
.pointer
;
5470 attr
= gfc_expr_attr (e
);
5472 if (allocatable
== 0 && attr
.pointer
== 0)
5475 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
5480 && e
->symtree
->n
.sym
->attr
.intent
== INTENT_IN
)
5482 gfc_error ("Cannot deallocate INTENT(IN) variable '%s' at %L",
5483 e
->symtree
->n
.sym
->name
, &e
->where
);
5491 /* Returns true if the expression e contains a reference to the symbol sym. */
5493 sym_in_expr (gfc_expr
*e
, gfc_symbol
*sym
, int *f ATTRIBUTE_UNUSED
)
5495 if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
== sym
)
5502 gfc_find_sym_in_expr (gfc_symbol
*sym
, gfc_expr
*e
)
5504 return gfc_traverse_expr (e
, sym
, sym_in_expr
, 0);
5508 /* Given the expression node e for an allocatable/pointer of derived type to be
5509 allocated, get the expression node to be initialized afterwards (needed for
5510 derived types with default initializers, and derived types with allocatable
5511 components that need nullification.) */
5514 expr_to_initialize (gfc_expr
*e
)
5520 result
= gfc_copy_expr (e
);
5522 /* Change the last array reference from AR_ELEMENT to AR_FULL. */
5523 for (ref
= result
->ref
; ref
; ref
= ref
->next
)
5524 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
5526 ref
->u
.ar
.type
= AR_FULL
;
5528 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
5529 ref
->u
.ar
.start
[i
] = ref
->u
.ar
.end
[i
] = ref
->u
.ar
.stride
[i
] = NULL
;
5531 result
->rank
= ref
->u
.ar
.dimen
;
5539 /* Resolve the expression in an ALLOCATE statement, doing the additional
5540 checks to see whether the expression is OK or not. The expression must
5541 have a trailing array reference that gives the size of the array. */
5544 resolve_allocate_expr (gfc_expr
*e
, gfc_code
*code
)
5546 int i
, pointer
, allocatable
, dimension
, check_intent_in
;
5547 symbol_attribute attr
;
5548 gfc_ref
*ref
, *ref2
;
5555 /* Check INTENT(IN), unless the object is a sub-component of a pointer. */
5556 check_intent_in
= 1;
5558 if (gfc_resolve_expr (e
) == FAILURE
)
5561 /* Make sure the expression is allocatable or a pointer. If it is
5562 pointer, the next-to-last reference must be a pointer. */
5566 if (e
->expr_type
!= EXPR_VARIABLE
)
5569 attr
= gfc_expr_attr (e
);
5570 pointer
= attr
.pointer
;
5571 dimension
= attr
.dimension
;
5575 allocatable
= e
->symtree
->n
.sym
->attr
.allocatable
;
5576 pointer
= e
->symtree
->n
.sym
->attr
.pointer
;
5577 dimension
= e
->symtree
->n
.sym
->attr
.dimension
;
5579 for (ref
= e
->ref
; ref
; ref2
= ref
, ref
= ref
->next
)
5582 check_intent_in
= 0;
5587 if (ref
->next
!= NULL
)
5592 allocatable
= (ref
->u
.c
.component
->as
!= NULL
5593 && ref
->u
.c
.component
->as
->type
== AS_DEFERRED
);
5595 pointer
= ref
->u
.c
.component
->attr
.pointer
;
5596 dimension
= ref
->u
.c
.component
->attr
.dimension
;
5607 if (allocatable
== 0 && pointer
== 0)
5609 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
5615 && e
->symtree
->n
.sym
->attr
.intent
== INTENT_IN
)
5617 gfc_error ("Cannot allocate INTENT(IN) variable '%s' at %L",
5618 e
->symtree
->n
.sym
->name
, &e
->where
);
5622 /* Add default initializer for those derived types that need them. */
5623 if (e
->ts
.type
== BT_DERIVED
&& (init_e
= gfc_default_initializer (&e
->ts
)))
5625 init_st
= gfc_get_code ();
5626 init_st
->loc
= code
->loc
;
5627 init_st
->op
= EXEC_INIT_ASSIGN
;
5628 init_st
->expr1
= expr_to_initialize (e
);
5629 init_st
->expr2
= init_e
;
5630 init_st
->next
= code
->next
;
5631 code
->next
= init_st
;
5634 if (pointer
&& dimension
== 0)
5637 /* Make sure the next-to-last reference node is an array specification. */
5639 if (ref2
== NULL
|| ref2
->type
!= REF_ARRAY
|| ref2
->u
.ar
.type
== AR_FULL
)
5641 gfc_error ("Array specification required in ALLOCATE statement "
5642 "at %L", &e
->where
);
5646 /* Make sure that the array section reference makes sense in the
5647 context of an ALLOCATE specification. */
5651 for (i
= 0; i
< ar
->dimen
; i
++)
5653 if (ref2
->u
.ar
.type
== AR_ELEMENT
)
5656 switch (ar
->dimen_type
[i
])
5662 if (ar
->start
[i
] != NULL
5663 && ar
->end
[i
] != NULL
5664 && ar
->stride
[i
] == NULL
)
5667 /* Fall Through... */
5671 gfc_error ("Bad array specification in ALLOCATE statement at %L",
5678 for (a
= code
->ext
.alloc_list
; a
; a
= a
->next
)
5680 sym
= a
->expr
->symtree
->n
.sym
;
5682 /* TODO - check derived type components. */
5683 if (sym
->ts
.type
== BT_DERIVED
)
5686 if ((ar
->start
[i
] != NULL
5687 && gfc_find_sym_in_expr (sym
, ar
->start
[i
]))
5688 || (ar
->end
[i
] != NULL
5689 && gfc_find_sym_in_expr (sym
, ar
->end
[i
])))
5691 gfc_error ("'%s' must not appear in the array specification at "
5692 "%L in the same ALLOCATE statement where it is "
5693 "itself allocated", sym
->name
, &ar
->where
);
5703 resolve_allocate_deallocate (gfc_code
*code
, const char *fcn
)
5705 gfc_expr
*stat
, *errmsg
, *pe
, *qe
;
5706 gfc_alloc
*a
, *p
, *q
;
5708 stat
= code
->expr1
? code
->expr1
: NULL
;
5710 errmsg
= code
->expr2
? code
->expr2
: NULL
;
5712 /* Check the stat variable. */
5715 if (stat
->symtree
->n
.sym
->attr
.intent
== INTENT_IN
)
5716 gfc_error ("Stat-variable '%s' at %L cannot be INTENT(IN)",
5717 stat
->symtree
->n
.sym
->name
, &stat
->where
);
5719 if (gfc_pure (NULL
) && gfc_impure_variable (stat
->symtree
->n
.sym
))
5720 gfc_error ("Illegal stat-variable at %L for a PURE procedure",
5723 if (stat
->ts
.type
!= BT_INTEGER
5724 && !(stat
->ref
&& (stat
->ref
->type
== REF_ARRAY
5725 || stat
->ref
->type
== REF_COMPONENT
)))
5726 gfc_error ("Stat-variable at %L must be a scalar INTEGER "
5727 "variable", &stat
->where
);
5729 for (p
= code
->ext
.alloc_list
; p
; p
= p
->next
)
5730 if (p
->expr
->symtree
->n
.sym
->name
== stat
->symtree
->n
.sym
->name
)
5731 gfc_error ("Stat-variable at %L shall not be %sd within "
5732 "the same %s statement", &stat
->where
, fcn
, fcn
);
5735 /* Check the errmsg variable. */
5739 gfc_warning ("ERRMSG at %L is useless without a STAT tag",
5742 if (errmsg
->symtree
->n
.sym
->attr
.intent
== INTENT_IN
)
5743 gfc_error ("Errmsg-variable '%s' at %L cannot be INTENT(IN)",
5744 errmsg
->symtree
->n
.sym
->name
, &errmsg
->where
);
5746 if (gfc_pure (NULL
) && gfc_impure_variable (errmsg
->symtree
->n
.sym
))
5747 gfc_error ("Illegal errmsg-variable at %L for a PURE procedure",
5750 if (errmsg
->ts
.type
!= BT_CHARACTER
5752 && (errmsg
->ref
->type
== REF_ARRAY
5753 || errmsg
->ref
->type
== REF_COMPONENT
)))
5754 gfc_error ("Errmsg-variable at %L must be a scalar CHARACTER "
5755 "variable", &errmsg
->where
);
5757 for (p
= code
->ext
.alloc_list
; p
; p
= p
->next
)
5758 if (p
->expr
->symtree
->n
.sym
->name
== errmsg
->symtree
->n
.sym
->name
)
5759 gfc_error ("Errmsg-variable at %L shall not be %sd within "
5760 "the same %s statement", &errmsg
->where
, fcn
, fcn
);
5763 /* Check that an allocate-object appears only once in the statement.
5764 FIXME: Checking derived types is disabled. */
5765 for (p
= code
->ext
.alloc_list
; p
; p
= p
->next
)
5768 if ((pe
->ref
&& pe
->ref
->type
!= REF_COMPONENT
)
5769 && (pe
->symtree
->n
.sym
->ts
.type
!= BT_DERIVED
))
5771 for (q
= p
->next
; q
; q
= q
->next
)
5774 if ((qe
->ref
&& qe
->ref
->type
!= REF_COMPONENT
)
5775 && (qe
->symtree
->n
.sym
->ts
.type
!= BT_DERIVED
)
5776 && (pe
->symtree
->n
.sym
->name
== qe
->symtree
->n
.sym
->name
))
5777 gfc_error ("Allocate-object at %L also appears at %L",
5778 &pe
->where
, &qe
->where
);
5783 if (strcmp (fcn
, "ALLOCATE") == 0)
5785 for (a
= code
->ext
.alloc_list
; a
; a
= a
->next
)
5786 resolve_allocate_expr (a
->expr
, code
);
5790 for (a
= code
->ext
.alloc_list
; a
; a
= a
->next
)
5791 resolve_deallocate_expr (a
->expr
);
5796 /************ SELECT CASE resolution subroutines ************/
5798 /* Callback function for our mergesort variant. Determines interval
5799 overlaps for CASEs. Return <0 if op1 < op2, 0 for overlap, >0 for
5800 op1 > op2. Assumes we're not dealing with the default case.
5801 We have op1 = (:L), (K:L) or (K:) and op2 = (:N), (M:N) or (M:).
5802 There are nine situations to check. */
5805 compare_cases (const gfc_case
*op1
, const gfc_case
*op2
)
5809 if (op1
->low
== NULL
) /* op1 = (:L) */
5811 /* op2 = (:N), so overlap. */
5813 /* op2 = (M:) or (M:N), L < M */
5814 if (op2
->low
!= NULL
5815 && gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
5818 else if (op1
->high
== NULL
) /* op1 = (K:) */
5820 /* op2 = (M:), so overlap. */
5822 /* op2 = (:N) or (M:N), K > N */
5823 if (op2
->high
!= NULL
5824 && gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
5827 else /* op1 = (K:L) */
5829 if (op2
->low
== NULL
) /* op2 = (:N), K > N */
5830 retval
= (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
5832 else if (op2
->high
== NULL
) /* op2 = (M:), L < M */
5833 retval
= (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
5835 else /* op2 = (M:N) */
5839 if (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
5842 else if (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
5851 /* Merge-sort a double linked case list, detecting overlap in the
5852 process. LIST is the head of the double linked case list before it
5853 is sorted. Returns the head of the sorted list if we don't see any
5854 overlap, or NULL otherwise. */
5857 check_case_overlap (gfc_case
*list
)
5859 gfc_case
*p
, *q
, *e
, *tail
;
5860 int insize
, nmerges
, psize
, qsize
, cmp
, overlap_seen
;
5862 /* If the passed list was empty, return immediately. */
5869 /* Loop unconditionally. The only exit from this loop is a return
5870 statement, when we've finished sorting the case list. */
5877 /* Count the number of merges we do in this pass. */
5880 /* Loop while there exists a merge to be done. */
5885 /* Count this merge. */
5888 /* Cut the list in two pieces by stepping INSIZE places
5889 forward in the list, starting from P. */
5892 for (i
= 0; i
< insize
; i
++)
5901 /* Now we have two lists. Merge them! */
5902 while (psize
> 0 || (qsize
> 0 && q
!= NULL
))
5904 /* See from which the next case to merge comes from. */
5907 /* P is empty so the next case must come from Q. */
5912 else if (qsize
== 0 || q
== NULL
)
5921 cmp
= compare_cases (p
, q
);
5924 /* The whole case range for P is less than the
5932 /* The whole case range for Q is greater than
5933 the case range for P. */
5940 /* The cases overlap, or they are the same
5941 element in the list. Either way, we must
5942 issue an error and get the next case from P. */
5943 /* FIXME: Sort P and Q by line number. */
5944 gfc_error ("CASE label at %L overlaps with CASE "
5945 "label at %L", &p
->where
, &q
->where
);
5953 /* Add the next element to the merged list. */
5962 /* P has now stepped INSIZE places along, and so has Q. So
5963 they're the same. */
5968 /* If we have done only one merge or none at all, we've
5969 finished sorting the cases. */
5978 /* Otherwise repeat, merging lists twice the size. */
5984 /* Check to see if an expression is suitable for use in a CASE statement.
5985 Makes sure that all case expressions are scalar constants of the same
5986 type. Return FAILURE if anything is wrong. */
5989 validate_case_label_expr (gfc_expr
*e
, gfc_expr
*case_expr
)
5991 if (e
== NULL
) return SUCCESS
;
5993 if (e
->ts
.type
!= case_expr
->ts
.type
)
5995 gfc_error ("Expression in CASE statement at %L must be of type %s",
5996 &e
->where
, gfc_basic_typename (case_expr
->ts
.type
));
6000 /* C805 (R808) For a given case-construct, each case-value shall be of
6001 the same type as case-expr. For character type, length differences
6002 are allowed, but the kind type parameters shall be the same. */
6004 if (case_expr
->ts
.type
== BT_CHARACTER
&& e
->ts
.kind
!= case_expr
->ts
.kind
)
6006 gfc_error ("Expression in CASE statement at %L must be of kind %d",
6007 &e
->where
, case_expr
->ts
.kind
);
6011 /* Convert the case value kind to that of case expression kind, if needed.
6012 FIXME: Should a warning be issued? */
6013 if (e
->ts
.kind
!= case_expr
->ts
.kind
)
6014 gfc_convert_type_warn (e
, &case_expr
->ts
, 2, 0);
6018 gfc_error ("Expression in CASE statement at %L must be scalar",
6027 /* Given a completely parsed select statement, we:
6029 - Validate all expressions and code within the SELECT.
6030 - Make sure that the selection expression is not of the wrong type.
6031 - Make sure that no case ranges overlap.
6032 - Eliminate unreachable cases and unreachable code resulting from
6033 removing case labels.
6035 The standard does allow unreachable cases, e.g. CASE (5:3). But
6036 they are a hassle for code generation, and to prevent that, we just
6037 cut them out here. This is not necessary for overlapping cases
6038 because they are illegal and we never even try to generate code.
6040 We have the additional caveat that a SELECT construct could have
6041 been a computed GOTO in the source code. Fortunately we can fairly
6042 easily work around that here: The case_expr for a "real" SELECT CASE
6043 is in code->expr1, but for a computed GOTO it is in code->expr2. All
6044 we have to do is make sure that the case_expr is a scalar integer
6048 resolve_select (gfc_code
*code
)
6051 gfc_expr
*case_expr
;
6052 gfc_case
*cp
, *default_case
, *tail
, *head
;
6053 int seen_unreachable
;
6059 if (code
->expr1
== NULL
)
6061 /* This was actually a computed GOTO statement. */
6062 case_expr
= code
->expr2
;
6063 if (case_expr
->ts
.type
!= BT_INTEGER
|| case_expr
->rank
!= 0)
6064 gfc_error ("Selection expression in computed GOTO statement "
6065 "at %L must be a scalar integer expression",
6068 /* Further checking is not necessary because this SELECT was built
6069 by the compiler, so it should always be OK. Just move the
6070 case_expr from expr2 to expr so that we can handle computed
6071 GOTOs as normal SELECTs from here on. */
6072 code
->expr1
= code
->expr2
;
6077 case_expr
= code
->expr1
;
6079 type
= case_expr
->ts
.type
;
6080 if (type
!= BT_LOGICAL
&& type
!= BT_INTEGER
&& type
!= BT_CHARACTER
)
6082 gfc_error ("Argument of SELECT statement at %L cannot be %s",
6083 &case_expr
->where
, gfc_typename (&case_expr
->ts
));
6085 /* Punt. Going on here just produce more garbage error messages. */
6089 if (case_expr
->rank
!= 0)
6091 gfc_error ("Argument of SELECT statement at %L must be a scalar "
6092 "expression", &case_expr
->where
);
6098 /* PR 19168 has a long discussion concerning a mismatch of the kinds
6099 of the SELECT CASE expression and its CASE values. Walk the lists
6100 of case values, and if we find a mismatch, promote case_expr to
6101 the appropriate kind. */
6103 if (type
== BT_LOGICAL
|| type
== BT_INTEGER
)
6105 for (body
= code
->block
; body
; body
= body
->block
)
6107 /* Walk the case label list. */
6108 for (cp
= body
->ext
.case_list
; cp
; cp
= cp
->next
)
6110 /* Intercept the DEFAULT case. It does not have a kind. */
6111 if (cp
->low
== NULL
&& cp
->high
== NULL
)
6114 /* Unreachable case ranges are discarded, so ignore. */
6115 if (cp
->low
!= NULL
&& cp
->high
!= NULL
6116 && cp
->low
!= cp
->high
6117 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
6120 /* FIXME: Should a warning be issued? */
6122 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->low
))
6123 gfc_convert_type_warn (case_expr
, &cp
->low
->ts
, 2, 0);
6125 if (cp
->high
!= NULL
6126 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->high
))
6127 gfc_convert_type_warn (case_expr
, &cp
->high
->ts
, 2, 0);
6132 /* Assume there is no DEFAULT case. */
6133 default_case
= NULL
;
6138 for (body
= code
->block
; body
; body
= body
->block
)
6140 /* Assume the CASE list is OK, and all CASE labels can be matched. */
6142 seen_unreachable
= 0;
6144 /* Walk the case label list, making sure that all case labels
6146 for (cp
= body
->ext
.case_list
; cp
; cp
= cp
->next
)
6148 /* Count the number of cases in the whole construct. */
6151 /* Intercept the DEFAULT case. */
6152 if (cp
->low
== NULL
&& cp
->high
== NULL
)
6154 if (default_case
!= NULL
)
6156 gfc_error ("The DEFAULT CASE at %L cannot be followed "
6157 "by a second DEFAULT CASE at %L",
6158 &default_case
->where
, &cp
->where
);
6169 /* Deal with single value cases and case ranges. Errors are
6170 issued from the validation function. */
6171 if(validate_case_label_expr (cp
->low
, case_expr
) != SUCCESS
6172 || validate_case_label_expr (cp
->high
, case_expr
) != SUCCESS
)
6178 if (type
== BT_LOGICAL
6179 && ((cp
->low
== NULL
|| cp
->high
== NULL
)
6180 || cp
->low
!= cp
->high
))
6182 gfc_error ("Logical range in CASE statement at %L is not "
6183 "allowed", &cp
->low
->where
);
6188 if (type
== BT_LOGICAL
&& cp
->low
->expr_type
== EXPR_CONSTANT
)
6191 value
= cp
->low
->value
.logical
== 0 ? 2 : 1;
6192 if (value
& seen_logical
)
6194 gfc_error ("constant logical value in CASE statement "
6195 "is repeated at %L",
6200 seen_logical
|= value
;
6203 if (cp
->low
!= NULL
&& cp
->high
!= NULL
6204 && cp
->low
!= cp
->high
6205 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
6207 if (gfc_option
.warn_surprising
)
6208 gfc_warning ("Range specification at %L can never "
6209 "be matched", &cp
->where
);
6211 cp
->unreachable
= 1;
6212 seen_unreachable
= 1;
6216 /* If the case range can be matched, it can also overlap with
6217 other cases. To make sure it does not, we put it in a
6218 double linked list here. We sort that with a merge sort
6219 later on to detect any overlapping cases. */
6223 head
->right
= head
->left
= NULL
;
6228 tail
->right
->left
= tail
;
6235 /* It there was a failure in the previous case label, give up
6236 for this case label list. Continue with the next block. */
6240 /* See if any case labels that are unreachable have been seen.
6241 If so, we eliminate them. This is a bit of a kludge because
6242 the case lists for a single case statement (label) is a
6243 single forward linked lists. */
6244 if (seen_unreachable
)
6246 /* Advance until the first case in the list is reachable. */
6247 while (body
->ext
.case_list
!= NULL
6248 && body
->ext
.case_list
->unreachable
)
6250 gfc_case
*n
= body
->ext
.case_list
;
6251 body
->ext
.case_list
= body
->ext
.case_list
->next
;
6253 gfc_free_case_list (n
);
6256 /* Strip all other unreachable cases. */
6257 if (body
->ext
.case_list
)
6259 for (cp
= body
->ext
.case_list
; cp
->next
; cp
= cp
->next
)
6261 if (cp
->next
->unreachable
)
6263 gfc_case
*n
= cp
->next
;
6264 cp
->next
= cp
->next
->next
;
6266 gfc_free_case_list (n
);
6273 /* See if there were overlapping cases. If the check returns NULL,
6274 there was overlap. In that case we don't do anything. If head
6275 is non-NULL, we prepend the DEFAULT case. The sorted list can
6276 then used during code generation for SELECT CASE constructs with
6277 a case expression of a CHARACTER type. */
6280 head
= check_case_overlap (head
);
6282 /* Prepend the default_case if it is there. */
6283 if (head
!= NULL
&& default_case
)
6285 default_case
->left
= NULL
;
6286 default_case
->right
= head
;
6287 head
->left
= default_case
;
6291 /* Eliminate dead blocks that may be the result if we've seen
6292 unreachable case labels for a block. */
6293 for (body
= code
; body
&& body
->block
; body
= body
->block
)
6295 if (body
->block
->ext
.case_list
== NULL
)
6297 /* Cut the unreachable block from the code chain. */
6298 gfc_code
*c
= body
->block
;
6299 body
->block
= c
->block
;
6301 /* Kill the dead block, but not the blocks below it. */
6303 gfc_free_statements (c
);
6307 /* More than two cases is legal but insane for logical selects.
6308 Issue a warning for it. */
6309 if (gfc_option
.warn_surprising
&& type
== BT_LOGICAL
6311 gfc_warning ("Logical SELECT CASE block at %L has more that two cases",
6316 /* Resolve a transfer statement. This is making sure that:
6317 -- a derived type being transferred has only non-pointer components
6318 -- a derived type being transferred doesn't have private components, unless
6319 it's being transferred from the module where the type was defined
6320 -- we're not trying to transfer a whole assumed size array. */
6323 resolve_transfer (gfc_code
*code
)
6332 if (exp
->expr_type
!= EXPR_VARIABLE
&& exp
->expr_type
!= EXPR_FUNCTION
)
6335 sym
= exp
->symtree
->n
.sym
;
6338 /* Go to actual component transferred. */
6339 for (ref
= code
->expr1
->ref
; ref
; ref
= ref
->next
)
6340 if (ref
->type
== REF_COMPONENT
)
6341 ts
= &ref
->u
.c
.component
->ts
;
6343 if (ts
->type
== BT_DERIVED
)
6345 /* Check that transferred derived type doesn't contain POINTER
6347 if (ts
->u
.derived
->attr
.pointer_comp
)
6349 gfc_error ("Data transfer element at %L cannot have "
6350 "POINTER components", &code
->loc
);
6354 if (ts
->u
.derived
->attr
.alloc_comp
)
6356 gfc_error ("Data transfer element at %L cannot have "
6357 "ALLOCATABLE components", &code
->loc
);
6361 if (derived_inaccessible (ts
->u
.derived
))
6363 gfc_error ("Data transfer element at %L cannot have "
6364 "PRIVATE components",&code
->loc
);
6369 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SIZE
6370 && exp
->ref
->type
== REF_ARRAY
&& exp
->ref
->u
.ar
.type
== AR_FULL
)
6372 gfc_error ("Data transfer element at %L cannot be a full reference to "
6373 "an assumed-size array", &code
->loc
);
6379 /*********** Toplevel code resolution subroutines ***********/
6381 /* Find the set of labels that are reachable from this block. We also
6382 record the last statement in each block. */
6385 find_reachable_labels (gfc_code
*block
)
6392 cs_base
->reachable_labels
= bitmap_obstack_alloc (&labels_obstack
);
6394 /* Collect labels in this block. We don't keep those corresponding
6395 to END {IF|SELECT}, these are checked in resolve_branch by going
6396 up through the code_stack. */
6397 for (c
= block
; c
; c
= c
->next
)
6399 if (c
->here
&& c
->op
!= EXEC_END_BLOCK
)
6400 bitmap_set_bit (cs_base
->reachable_labels
, c
->here
->value
);
6403 /* Merge with labels from parent block. */
6406 gcc_assert (cs_base
->prev
->reachable_labels
);
6407 bitmap_ior_into (cs_base
->reachable_labels
,
6408 cs_base
->prev
->reachable_labels
);
6412 /* Given a branch to a label, see if the branch is conforming.
6413 The code node describes where the branch is located. */
6416 resolve_branch (gfc_st_label
*label
, gfc_code
*code
)
6423 /* Step one: is this a valid branching target? */
6425 if (label
->defined
== ST_LABEL_UNKNOWN
)
6427 gfc_error ("Label %d referenced at %L is never defined", label
->value
,
6432 if (label
->defined
!= ST_LABEL_TARGET
)
6434 gfc_error ("Statement at %L is not a valid branch target statement "
6435 "for the branch statement at %L", &label
->where
, &code
->loc
);
6439 /* Step two: make sure this branch is not a branch to itself ;-) */
6441 if (code
->here
== label
)
6443 gfc_warning ("Branch at %L may result in an infinite loop", &code
->loc
);
6447 /* Step three: See if the label is in the same block as the
6448 branching statement. The hard work has been done by setting up
6449 the bitmap reachable_labels. */
6451 if (bitmap_bit_p (cs_base
->reachable_labels
, label
->value
))
6454 /* Step four: If we haven't found the label in the bitmap, it may
6455 still be the label of the END of the enclosing block, in which
6456 case we find it by going up the code_stack. */
6458 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
6459 if (stack
->current
->next
&& stack
->current
->next
->here
== label
)
6464 gcc_assert (stack
->current
->next
->op
== EXEC_END_BLOCK
);
6468 /* The label is not in an enclosing block, so illegal. This was
6469 allowed in Fortran 66, so we allow it as extension. No
6470 further checks are necessary in this case. */
6471 gfc_notify_std (GFC_STD_LEGACY
, "Label at %L is not in the same block "
6472 "as the GOTO statement at %L", &label
->where
,
6478 /* Check whether EXPR1 has the same shape as EXPR2. */
6481 resolve_where_shape (gfc_expr
*expr1
, gfc_expr
*expr2
)
6483 mpz_t shape
[GFC_MAX_DIMENSIONS
];
6484 mpz_t shape2
[GFC_MAX_DIMENSIONS
];
6485 gfc_try result
= FAILURE
;
6488 /* Compare the rank. */
6489 if (expr1
->rank
!= expr2
->rank
)
6492 /* Compare the size of each dimension. */
6493 for (i
=0; i
<expr1
->rank
; i
++)
6495 if (gfc_array_dimen_size (expr1
, i
, &shape
[i
]) == FAILURE
)
6498 if (gfc_array_dimen_size (expr2
, i
, &shape2
[i
]) == FAILURE
)
6501 if (mpz_cmp (shape
[i
], shape2
[i
]))
6505 /* When either of the two expression is an assumed size array, we
6506 ignore the comparison of dimension sizes. */
6511 for (i
--; i
>= 0; i
--)
6513 mpz_clear (shape
[i
]);
6514 mpz_clear (shape2
[i
]);
6520 /* Check whether a WHERE assignment target or a WHERE mask expression
6521 has the same shape as the outmost WHERE mask expression. */
6524 resolve_where (gfc_code
*code
, gfc_expr
*mask
)
6530 cblock
= code
->block
;
6532 /* Store the first WHERE mask-expr of the WHERE statement or construct.
6533 In case of nested WHERE, only the outmost one is stored. */
6534 if (mask
== NULL
) /* outmost WHERE */
6536 else /* inner WHERE */
6543 /* Check if the mask-expr has a consistent shape with the
6544 outmost WHERE mask-expr. */
6545 if (resolve_where_shape (cblock
->expr1
, e
) == FAILURE
)
6546 gfc_error ("WHERE mask at %L has inconsistent shape",
6547 &cblock
->expr1
->where
);
6550 /* the assignment statement of a WHERE statement, or the first
6551 statement in where-body-construct of a WHERE construct */
6552 cnext
= cblock
->next
;
6557 /* WHERE assignment statement */
6560 /* Check shape consistent for WHERE assignment target. */
6561 if (e
&& resolve_where_shape (cnext
->expr1
, e
) == FAILURE
)
6562 gfc_error ("WHERE assignment target at %L has "
6563 "inconsistent shape", &cnext
->expr1
->where
);
6567 case EXEC_ASSIGN_CALL
:
6568 resolve_call (cnext
);
6569 if (!cnext
->resolved_sym
->attr
.elemental
)
6570 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
6571 &cnext
->ext
.actual
->expr
->where
);
6574 /* WHERE or WHERE construct is part of a where-body-construct */
6576 resolve_where (cnext
, e
);
6580 gfc_error ("Unsupported statement inside WHERE at %L",
6583 /* the next statement within the same where-body-construct */
6584 cnext
= cnext
->next
;
6586 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
6587 cblock
= cblock
->block
;
6592 /* Resolve assignment in FORALL construct.
6593 NVAR is the number of FORALL index variables, and VAR_EXPR records the
6594 FORALL index variables. */
6597 gfc_resolve_assign_in_forall (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
6601 for (n
= 0; n
< nvar
; n
++)
6603 gfc_symbol
*forall_index
;
6605 forall_index
= var_expr
[n
]->symtree
->n
.sym
;
6607 /* Check whether the assignment target is one of the FORALL index
6609 if ((code
->expr1
->expr_type
== EXPR_VARIABLE
)
6610 && (code
->expr1
->symtree
->n
.sym
== forall_index
))
6611 gfc_error ("Assignment to a FORALL index variable at %L",
6612 &code
->expr1
->where
);
6615 /* If one of the FORALL index variables doesn't appear in the
6616 assignment variable, then there could be a many-to-one
6617 assignment. Emit a warning rather than an error because the
6618 mask could be resolving this problem. */
6619 if (find_forall_index (code
->expr1
, forall_index
, 0) == FAILURE
)
6620 gfc_warning ("The FORALL with index '%s' is not used on the "
6621 "left side of the assignment at %L and so might "
6622 "cause multiple assignment to this object",
6623 var_expr
[n
]->symtree
->name
, &code
->expr1
->where
);
6629 /* Resolve WHERE statement in FORALL construct. */
6632 gfc_resolve_where_code_in_forall (gfc_code
*code
, int nvar
,
6633 gfc_expr
**var_expr
)
6638 cblock
= code
->block
;
6641 /* the assignment statement of a WHERE statement, or the first
6642 statement in where-body-construct of a WHERE construct */
6643 cnext
= cblock
->next
;
6648 /* WHERE assignment statement */
6650 gfc_resolve_assign_in_forall (cnext
, nvar
, var_expr
);
6653 /* WHERE operator assignment statement */
6654 case EXEC_ASSIGN_CALL
:
6655 resolve_call (cnext
);
6656 if (!cnext
->resolved_sym
->attr
.elemental
)
6657 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
6658 &cnext
->ext
.actual
->expr
->where
);
6661 /* WHERE or WHERE construct is part of a where-body-construct */
6663 gfc_resolve_where_code_in_forall (cnext
, nvar
, var_expr
);
6667 gfc_error ("Unsupported statement inside WHERE at %L",
6670 /* the next statement within the same where-body-construct */
6671 cnext
= cnext
->next
;
6673 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
6674 cblock
= cblock
->block
;
6679 /* Traverse the FORALL body to check whether the following errors exist:
6680 1. For assignment, check if a many-to-one assignment happens.
6681 2. For WHERE statement, check the WHERE body to see if there is any
6682 many-to-one assignment. */
6685 gfc_resolve_forall_body (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
6689 c
= code
->block
->next
;
6695 case EXEC_POINTER_ASSIGN
:
6696 gfc_resolve_assign_in_forall (c
, nvar
, var_expr
);
6699 case EXEC_ASSIGN_CALL
:
6703 /* Because the gfc_resolve_blocks() will handle the nested FORALL,
6704 there is no need to handle it here. */
6708 gfc_resolve_where_code_in_forall(c
, nvar
, var_expr
);
6713 /* The next statement in the FORALL body. */
6719 /* Counts the number of iterators needed inside a forall construct, including
6720 nested forall constructs. This is used to allocate the needed memory
6721 in gfc_resolve_forall. */
6724 gfc_count_forall_iterators (gfc_code
*code
)
6726 int max_iters
, sub_iters
, current_iters
;
6727 gfc_forall_iterator
*fa
;
6729 gcc_assert(code
->op
== EXEC_FORALL
);
6733 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
6736 code
= code
->block
->next
;
6740 if (code
->op
== EXEC_FORALL
)
6742 sub_iters
= gfc_count_forall_iterators (code
);
6743 if (sub_iters
> max_iters
)
6744 max_iters
= sub_iters
;
6749 return current_iters
+ max_iters
;
6753 /* Given a FORALL construct, first resolve the FORALL iterator, then call
6754 gfc_resolve_forall_body to resolve the FORALL body. */
6757 gfc_resolve_forall (gfc_code
*code
, gfc_namespace
*ns
, int forall_save
)
6759 static gfc_expr
**var_expr
;
6760 static int total_var
= 0;
6761 static int nvar
= 0;
6763 gfc_forall_iterator
*fa
;
6768 /* Start to resolve a FORALL construct */
6769 if (forall_save
== 0)
6771 /* Count the total number of FORALL index in the nested FORALL
6772 construct in order to allocate the VAR_EXPR with proper size. */
6773 total_var
= gfc_count_forall_iterators (code
);
6775 /* Allocate VAR_EXPR with NUMBER_OF_FORALL_INDEX elements. */
6776 var_expr
= (gfc_expr
**) gfc_getmem (total_var
* sizeof (gfc_expr
*));
6779 /* The information about FORALL iterator, including FORALL index start, end
6780 and stride. The FORALL index can not appear in start, end or stride. */
6781 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
6783 /* Check if any outer FORALL index name is the same as the current
6785 for (i
= 0; i
< nvar
; i
++)
6787 if (fa
->var
->symtree
->n
.sym
== var_expr
[i
]->symtree
->n
.sym
)
6789 gfc_error ("An outer FORALL construct already has an index "
6790 "with this name %L", &fa
->var
->where
);
6794 /* Record the current FORALL index. */
6795 var_expr
[nvar
] = gfc_copy_expr (fa
->var
);
6799 /* No memory leak. */
6800 gcc_assert (nvar
<= total_var
);
6803 /* Resolve the FORALL body. */
6804 gfc_resolve_forall_body (code
, nvar
, var_expr
);
6806 /* May call gfc_resolve_forall to resolve the inner FORALL loop. */
6807 gfc_resolve_blocks (code
->block
, ns
);
6811 /* Free only the VAR_EXPRs allocated in this frame. */
6812 for (i
= nvar
; i
< tmp
; i
++)
6813 gfc_free_expr (var_expr
[i
]);
6817 /* We are in the outermost FORALL construct. */
6818 gcc_assert (forall_save
== 0);
6820 /* VAR_EXPR is not needed any more. */
6821 gfc_free (var_expr
);
6827 /* Resolve lists of blocks found in IF, SELECT CASE, WHERE, FORALL ,GOTO and
6830 static void resolve_code (gfc_code
*, gfc_namespace
*);
6833 gfc_resolve_blocks (gfc_code
*b
, gfc_namespace
*ns
)
6837 for (; b
; b
= b
->block
)
6839 t
= gfc_resolve_expr (b
->expr1
);
6840 if (gfc_resolve_expr (b
->expr2
) == FAILURE
)
6846 if (t
== SUCCESS
&& b
->expr1
!= NULL
6847 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
!= 0))
6848 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
6855 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
== 0))
6856 gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
6861 resolve_branch (b
->label1
, b
);
6874 case EXEC_OMP_ATOMIC
:
6875 case EXEC_OMP_CRITICAL
:
6877 case EXEC_OMP_MASTER
:
6878 case EXEC_OMP_ORDERED
:
6879 case EXEC_OMP_PARALLEL
:
6880 case EXEC_OMP_PARALLEL_DO
:
6881 case EXEC_OMP_PARALLEL_SECTIONS
:
6882 case EXEC_OMP_PARALLEL_WORKSHARE
:
6883 case EXEC_OMP_SECTIONS
:
6884 case EXEC_OMP_SINGLE
:
6886 case EXEC_OMP_TASKWAIT
:
6887 case EXEC_OMP_WORKSHARE
:
6891 gfc_internal_error ("resolve_block(): Bad block type");
6894 resolve_code (b
->next
, ns
);
6899 /* Does everything to resolve an ordinary assignment. Returns true
6900 if this is an interface assignment. */
6902 resolve_ordinary_assign (gfc_code
*code
, gfc_namespace
*ns
)
6912 if (gfc_extend_assign (code
, ns
) == SUCCESS
)
6914 lhs
= code
->ext
.actual
->expr
;
6915 rhs
= code
->ext
.actual
->next
->expr
;
6916 if (gfc_pure (NULL
) && !gfc_pure (code
->symtree
->n
.sym
))
6918 gfc_error ("Subroutine '%s' called instead of assignment at "
6919 "%L must be PURE", code
->symtree
->n
.sym
->name
,
6924 /* Make a temporary rhs when there is a default initializer
6925 and rhs is the same symbol as the lhs. */
6926 if (rhs
->expr_type
== EXPR_VARIABLE
6927 && rhs
->symtree
->n
.sym
->ts
.type
== BT_DERIVED
6928 && has_default_initializer (rhs
->symtree
->n
.sym
->ts
.u
.derived
)
6929 && (lhs
->symtree
->n
.sym
== rhs
->symtree
->n
.sym
))
6930 code
->ext
.actual
->next
->expr
= gfc_get_parentheses (rhs
);
6939 && gfc_notify_std (GFC_STD_GNU
, "Extension: BOZ literal at %L outside "
6940 "a DATA statement and outside INT/REAL/DBLE/CMPLX",
6941 &code
->loc
) == FAILURE
)
6944 /* Handle the case of a BOZ literal on the RHS. */
6945 if (rhs
->is_boz
&& lhs
->ts
.type
!= BT_INTEGER
)
6948 if (gfc_option
.warn_surprising
)
6949 gfc_warning ("BOZ literal at %L is bitwise transferred "
6950 "non-integer symbol '%s'", &code
->loc
,
6951 lhs
->symtree
->n
.sym
->name
);
6953 if (!gfc_convert_boz (rhs
, &lhs
->ts
))
6955 if ((rc
= gfc_range_check (rhs
)) != ARITH_OK
)
6957 if (rc
== ARITH_UNDERFLOW
)
6958 gfc_error ("Arithmetic underflow of bit-wise transferred BOZ at %L"
6959 ". This check can be disabled with the option "
6960 "-fno-range-check", &rhs
->where
);
6961 else if (rc
== ARITH_OVERFLOW
)
6962 gfc_error ("Arithmetic overflow of bit-wise transferred BOZ at %L"
6963 ". This check can be disabled with the option "
6964 "-fno-range-check", &rhs
->where
);
6965 else if (rc
== ARITH_NAN
)
6966 gfc_error ("Arithmetic NaN of bit-wise transferred BOZ at %L"
6967 ". This check can be disabled with the option "
6968 "-fno-range-check", &rhs
->where
);
6974 if (lhs
->ts
.type
== BT_CHARACTER
6975 && gfc_option
.warn_character_truncation
)
6977 if (lhs
->ts
.u
.cl
!= NULL
6978 && lhs
->ts
.u
.cl
->length
!= NULL
6979 && lhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
6980 llen
= mpz_get_si (lhs
->ts
.u
.cl
->length
->value
.integer
);
6982 if (rhs
->expr_type
== EXPR_CONSTANT
)
6983 rlen
= rhs
->value
.character
.length
;
6985 else if (rhs
->ts
.u
.cl
!= NULL
6986 && rhs
->ts
.u
.cl
->length
!= NULL
6987 && rhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
6988 rlen
= mpz_get_si (rhs
->ts
.u
.cl
->length
->value
.integer
);
6990 if (rlen
&& llen
&& rlen
> llen
)
6991 gfc_warning_now ("CHARACTER expression will be truncated "
6992 "in assignment (%d/%d) at %L",
6993 llen
, rlen
, &code
->loc
);
6996 /* Ensure that a vector index expression for the lvalue is evaluated
6997 to a temporary if the lvalue symbol is referenced in it. */
7000 for (ref
= lhs
->ref
; ref
; ref
= ref
->next
)
7001 if (ref
->type
== REF_ARRAY
)
7003 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
7004 if (ref
->u
.ar
.dimen_type
[n
] == DIMEN_VECTOR
7005 && gfc_find_sym_in_expr (lhs
->symtree
->n
.sym
,
7006 ref
->u
.ar
.start
[n
]))
7008 = gfc_get_parentheses (ref
->u
.ar
.start
[n
]);
7012 if (gfc_pure (NULL
))
7014 if (gfc_impure_variable (lhs
->symtree
->n
.sym
))
7016 gfc_error ("Cannot assign to variable '%s' in PURE "
7018 lhs
->symtree
->n
.sym
->name
,
7023 if (lhs
->ts
.type
== BT_DERIVED
7024 && lhs
->expr_type
== EXPR_VARIABLE
7025 && lhs
->ts
.u
.derived
->attr
.pointer_comp
7026 && gfc_impure_variable (rhs
->symtree
->n
.sym
))
7028 gfc_error ("The impure variable at %L is assigned to "
7029 "a derived type variable with a POINTER "
7030 "component in a PURE procedure (12.6)",
7036 gfc_check_assign (lhs
, rhs
, 1);
7040 /* Given a block of code, recursively resolve everything pointed to by this
7044 resolve_code (gfc_code
*code
, gfc_namespace
*ns
)
7046 int omp_workshare_save
;
7051 frame
.prev
= cs_base
;
7055 find_reachable_labels (code
);
7057 for (; code
; code
= code
->next
)
7059 frame
.current
= code
;
7060 forall_save
= forall_flag
;
7062 if (code
->op
== EXEC_FORALL
)
7065 gfc_resolve_forall (code
, ns
, forall_save
);
7068 else if (code
->block
)
7070 omp_workshare_save
= -1;
7073 case EXEC_OMP_PARALLEL_WORKSHARE
:
7074 omp_workshare_save
= omp_workshare_flag
;
7075 omp_workshare_flag
= 1;
7076 gfc_resolve_omp_parallel_blocks (code
, ns
);
7078 case EXEC_OMP_PARALLEL
:
7079 case EXEC_OMP_PARALLEL_DO
:
7080 case EXEC_OMP_PARALLEL_SECTIONS
:
7082 omp_workshare_save
= omp_workshare_flag
;
7083 omp_workshare_flag
= 0;
7084 gfc_resolve_omp_parallel_blocks (code
, ns
);
7087 gfc_resolve_omp_do_blocks (code
, ns
);
7089 case EXEC_OMP_WORKSHARE
:
7090 omp_workshare_save
= omp_workshare_flag
;
7091 omp_workshare_flag
= 1;
7094 gfc_resolve_blocks (code
->block
, ns
);
7098 if (omp_workshare_save
!= -1)
7099 omp_workshare_flag
= omp_workshare_save
;
7103 if (code
->op
!= EXEC_COMPCALL
&& code
->op
!= EXEC_CALL_PPC
)
7104 t
= gfc_resolve_expr (code
->expr1
);
7105 forall_flag
= forall_save
;
7107 if (gfc_resolve_expr (code
->expr2
) == FAILURE
)
7113 case EXEC_END_BLOCK
:
7123 /* Keep track of which entry we are up to. */
7124 current_entry_id
= code
->ext
.entry
->id
;
7128 resolve_where (code
, NULL
);
7132 if (code
->expr1
!= NULL
)
7134 if (code
->expr1
->ts
.type
!= BT_INTEGER
)
7135 gfc_error ("ASSIGNED GOTO statement at %L requires an "
7136 "INTEGER variable", &code
->expr1
->where
);
7137 else if (code
->expr1
->symtree
->n
.sym
->attr
.assign
!= 1)
7138 gfc_error ("Variable '%s' has not been assigned a target "
7139 "label at %L", code
->expr1
->symtree
->n
.sym
->name
,
7140 &code
->expr1
->where
);
7143 resolve_branch (code
->label1
, code
);
7147 if (code
->expr1
!= NULL
7148 && (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
))
7149 gfc_error ("Alternate RETURN statement at %L requires a SCALAR-"
7150 "INTEGER return specifier", &code
->expr1
->where
);
7153 case EXEC_INIT_ASSIGN
:
7154 case EXEC_END_PROCEDURE
:
7161 if (resolve_ordinary_assign (code
, ns
))
7166 case EXEC_LABEL_ASSIGN
:
7167 if (code
->label1
->defined
== ST_LABEL_UNKNOWN
)
7168 gfc_error ("Label %d referenced at %L is never defined",
7169 code
->label1
->value
, &code
->label1
->where
);
7171 && (code
->expr1
->expr_type
!= EXPR_VARIABLE
7172 || code
->expr1
->symtree
->n
.sym
->ts
.type
!= BT_INTEGER
7173 || code
->expr1
->symtree
->n
.sym
->ts
.kind
7174 != gfc_default_integer_kind
7175 || code
->expr1
->symtree
->n
.sym
->as
!= NULL
))
7176 gfc_error ("ASSIGN statement at %L requires a scalar "
7177 "default INTEGER variable", &code
->expr1
->where
);
7180 case EXEC_POINTER_ASSIGN
:
7184 gfc_check_pointer_assign (code
->expr1
, code
->expr2
);
7187 case EXEC_ARITHMETIC_IF
:
7189 && code
->expr1
->ts
.type
!= BT_INTEGER
7190 && code
->expr1
->ts
.type
!= BT_REAL
)
7191 gfc_error ("Arithmetic IF statement at %L requires a numeric "
7192 "expression", &code
->expr1
->where
);
7194 resolve_branch (code
->label1
, code
);
7195 resolve_branch (code
->label2
, code
);
7196 resolve_branch (code
->label3
, code
);
7200 if (t
== SUCCESS
&& code
->expr1
!= NULL
7201 && (code
->expr1
->ts
.type
!= BT_LOGICAL
7202 || code
->expr1
->rank
!= 0))
7203 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
7204 &code
->expr1
->where
);
7209 resolve_call (code
);
7213 resolve_typebound_call (code
);
7217 resolve_ppc_call (code
);
7221 /* Select is complicated. Also, a SELECT construct could be
7222 a transformed computed GOTO. */
7223 resolve_select (code
);
7227 if (code
->ext
.iterator
!= NULL
)
7229 gfc_iterator
*iter
= code
->ext
.iterator
;
7230 if (gfc_resolve_iterator (iter
, true) != FAILURE
)
7231 gfc_resolve_do_iterator (code
, iter
->var
->symtree
->n
.sym
);
7236 if (code
->expr1
== NULL
)
7237 gfc_internal_error ("resolve_code(): No expression on DO WHILE");
7239 && (code
->expr1
->rank
!= 0
7240 || code
->expr1
->ts
.type
!= BT_LOGICAL
))
7241 gfc_error ("Exit condition of DO WHILE loop at %L must be "
7242 "a scalar LOGICAL expression", &code
->expr1
->where
);
7247 resolve_allocate_deallocate (code
, "ALLOCATE");
7251 case EXEC_DEALLOCATE
:
7253 resolve_allocate_deallocate (code
, "DEALLOCATE");
7258 if (gfc_resolve_open (code
->ext
.open
) == FAILURE
)
7261 resolve_branch (code
->ext
.open
->err
, code
);
7265 if (gfc_resolve_close (code
->ext
.close
) == FAILURE
)
7268 resolve_branch (code
->ext
.close
->err
, code
);
7271 case EXEC_BACKSPACE
:
7275 if (gfc_resolve_filepos (code
->ext
.filepos
) == FAILURE
)
7278 resolve_branch (code
->ext
.filepos
->err
, code
);
7282 if (gfc_resolve_inquire (code
->ext
.inquire
) == FAILURE
)
7285 resolve_branch (code
->ext
.inquire
->err
, code
);
7289 gcc_assert (code
->ext
.inquire
!= NULL
);
7290 if (gfc_resolve_inquire (code
->ext
.inquire
) == FAILURE
)
7293 resolve_branch (code
->ext
.inquire
->err
, code
);
7297 if (gfc_resolve_wait (code
->ext
.wait
) == FAILURE
)
7300 resolve_branch (code
->ext
.wait
->err
, code
);
7301 resolve_branch (code
->ext
.wait
->end
, code
);
7302 resolve_branch (code
->ext
.wait
->eor
, code
);
7307 if (gfc_resolve_dt (code
->ext
.dt
, &code
->loc
) == FAILURE
)
7310 resolve_branch (code
->ext
.dt
->err
, code
);
7311 resolve_branch (code
->ext
.dt
->end
, code
);
7312 resolve_branch (code
->ext
.dt
->eor
, code
);
7316 resolve_transfer (code
);
7320 resolve_forall_iterators (code
->ext
.forall_iterator
);
7322 if (code
->expr1
!= NULL
&& code
->expr1
->ts
.type
!= BT_LOGICAL
)
7323 gfc_error ("FORALL mask clause at %L requires a LOGICAL "
7324 "expression", &code
->expr1
->where
);
7327 case EXEC_OMP_ATOMIC
:
7328 case EXEC_OMP_BARRIER
:
7329 case EXEC_OMP_CRITICAL
:
7330 case EXEC_OMP_FLUSH
:
7332 case EXEC_OMP_MASTER
:
7333 case EXEC_OMP_ORDERED
:
7334 case EXEC_OMP_SECTIONS
:
7335 case EXEC_OMP_SINGLE
:
7336 case EXEC_OMP_TASKWAIT
:
7337 case EXEC_OMP_WORKSHARE
:
7338 gfc_resolve_omp_directive (code
, ns
);
7341 case EXEC_OMP_PARALLEL
:
7342 case EXEC_OMP_PARALLEL_DO
:
7343 case EXEC_OMP_PARALLEL_SECTIONS
:
7344 case EXEC_OMP_PARALLEL_WORKSHARE
:
7346 omp_workshare_save
= omp_workshare_flag
;
7347 omp_workshare_flag
= 0;
7348 gfc_resolve_omp_directive (code
, ns
);
7349 omp_workshare_flag
= omp_workshare_save
;
7353 gfc_internal_error ("resolve_code(): Bad statement code");
7357 cs_base
= frame
.prev
;
7361 /* Resolve initial values and make sure they are compatible with
7365 resolve_values (gfc_symbol
*sym
)
7367 if (sym
->value
== NULL
)
7370 if (gfc_resolve_expr (sym
->value
) == FAILURE
)
7373 gfc_check_assign_symbol (sym
, sym
->value
);
7377 /* Verify the binding labels for common blocks that are BIND(C). The label
7378 for a BIND(C) common block must be identical in all scoping units in which
7379 the common block is declared. Further, the binding label can not collide
7380 with any other global entity in the program. */
7383 resolve_bind_c_comms (gfc_symtree
*comm_block_tree
)
7385 if (comm_block_tree
->n
.common
->is_bind_c
== 1)
7387 gfc_gsymbol
*binding_label_gsym
;
7388 gfc_gsymbol
*comm_name_gsym
;
7390 /* See if a global symbol exists by the common block's name. It may
7391 be NULL if the common block is use-associated. */
7392 comm_name_gsym
= gfc_find_gsymbol (gfc_gsym_root
,
7393 comm_block_tree
->n
.common
->name
);
7394 if (comm_name_gsym
!= NULL
&& comm_name_gsym
->type
!= GSYM_COMMON
)
7395 gfc_error ("Binding label '%s' for common block '%s' at %L collides "
7396 "with the global entity '%s' at %L",
7397 comm_block_tree
->n
.common
->binding_label
,
7398 comm_block_tree
->n
.common
->name
,
7399 &(comm_block_tree
->n
.common
->where
),
7400 comm_name_gsym
->name
, &(comm_name_gsym
->where
));
7401 else if (comm_name_gsym
!= NULL
7402 && strcmp (comm_name_gsym
->name
,
7403 comm_block_tree
->n
.common
->name
) == 0)
7405 /* TODO: Need to make sure the fields of gfc_gsymbol are initialized
7407 if (comm_name_gsym
->binding_label
== NULL
)
7408 /* No binding label for common block stored yet; save this one. */
7409 comm_name_gsym
->binding_label
=
7410 comm_block_tree
->n
.common
->binding_label
;
7412 if (strcmp (comm_name_gsym
->binding_label
,
7413 comm_block_tree
->n
.common
->binding_label
) != 0)
7415 /* Common block names match but binding labels do not. */
7416 gfc_error ("Binding label '%s' for common block '%s' at %L "
7417 "does not match the binding label '%s' for common "
7419 comm_block_tree
->n
.common
->binding_label
,
7420 comm_block_tree
->n
.common
->name
,
7421 &(comm_block_tree
->n
.common
->where
),
7422 comm_name_gsym
->binding_label
,
7423 comm_name_gsym
->name
,
7424 &(comm_name_gsym
->where
));
7429 /* There is no binding label (NAME="") so we have nothing further to
7430 check and nothing to add as a global symbol for the label. */
7431 if (comm_block_tree
->n
.common
->binding_label
[0] == '\0' )
7434 binding_label_gsym
=
7435 gfc_find_gsymbol (gfc_gsym_root
,
7436 comm_block_tree
->n
.common
->binding_label
);
7437 if (binding_label_gsym
== NULL
)
7439 /* Need to make a global symbol for the binding label to prevent
7440 it from colliding with another. */
7441 binding_label_gsym
=
7442 gfc_get_gsymbol (comm_block_tree
->n
.common
->binding_label
);
7443 binding_label_gsym
->sym_name
= comm_block_tree
->n
.common
->name
;
7444 binding_label_gsym
->type
= GSYM_COMMON
;
7448 /* If comm_name_gsym is NULL, the name common block is use
7449 associated and the name could be colliding. */
7450 if (binding_label_gsym
->type
!= GSYM_COMMON
)
7451 gfc_error ("Binding label '%s' for common block '%s' at %L "
7452 "collides with the global entity '%s' at %L",
7453 comm_block_tree
->n
.common
->binding_label
,
7454 comm_block_tree
->n
.common
->name
,
7455 &(comm_block_tree
->n
.common
->where
),
7456 binding_label_gsym
->name
,
7457 &(binding_label_gsym
->where
));
7458 else if (comm_name_gsym
!= NULL
7459 && (strcmp (binding_label_gsym
->name
,
7460 comm_name_gsym
->binding_label
) != 0)
7461 && (strcmp (binding_label_gsym
->sym_name
,
7462 comm_name_gsym
->name
) != 0))
7463 gfc_error ("Binding label '%s' for common block '%s' at %L "
7464 "collides with global entity '%s' at %L",
7465 binding_label_gsym
->name
, binding_label_gsym
->sym_name
,
7466 &(comm_block_tree
->n
.common
->where
),
7467 comm_name_gsym
->name
, &(comm_name_gsym
->where
));
7475 /* Verify any BIND(C) derived types in the namespace so we can report errors
7476 for them once, rather than for each variable declared of that type. */
7479 resolve_bind_c_derived_types (gfc_symbol
*derived_sym
)
7481 if (derived_sym
!= NULL
&& derived_sym
->attr
.flavor
== FL_DERIVED
7482 && derived_sym
->attr
.is_bind_c
== 1)
7483 verify_bind_c_derived_type (derived_sym
);
7489 /* Verify that any binding labels used in a given namespace do not collide
7490 with the names or binding labels of any global symbols. */
7493 gfc_verify_binding_labels (gfc_symbol
*sym
)
7497 if (sym
!= NULL
&& sym
->attr
.is_bind_c
&& sym
->attr
.is_iso_c
== 0
7498 && sym
->attr
.flavor
!= FL_DERIVED
&& sym
->binding_label
[0] != '\0')
7500 gfc_gsymbol
*bind_c_sym
;
7502 bind_c_sym
= gfc_find_gsymbol (gfc_gsym_root
, sym
->binding_label
);
7503 if (bind_c_sym
!= NULL
7504 && strcmp (bind_c_sym
->name
, sym
->binding_label
) == 0)
7506 if (sym
->attr
.if_source
== IFSRC_DECL
7507 && (bind_c_sym
->type
!= GSYM_SUBROUTINE
7508 && bind_c_sym
->type
!= GSYM_FUNCTION
)
7509 && ((sym
->attr
.contained
== 1
7510 && strcmp (bind_c_sym
->sym_name
, sym
->name
) != 0)
7511 || (sym
->attr
.use_assoc
== 1
7512 && (strcmp (bind_c_sym
->mod_name
, sym
->module
) != 0))))
7514 /* Make sure global procedures don't collide with anything. */
7515 gfc_error ("Binding label '%s' at %L collides with the global "
7516 "entity '%s' at %L", sym
->binding_label
,
7517 &(sym
->declared_at
), bind_c_sym
->name
,
7518 &(bind_c_sym
->where
));
7521 else if (sym
->attr
.contained
== 0
7522 && (sym
->attr
.if_source
== IFSRC_IFBODY
7523 && sym
->attr
.flavor
== FL_PROCEDURE
)
7524 && (bind_c_sym
->sym_name
!= NULL
7525 && strcmp (bind_c_sym
->sym_name
, sym
->name
) != 0))
7527 /* Make sure procedures in interface bodies don't collide. */
7528 gfc_error ("Binding label '%s' in interface body at %L collides "
7529 "with the global entity '%s' at %L",
7531 &(sym
->declared_at
), bind_c_sym
->name
,
7532 &(bind_c_sym
->where
));
7535 else if (sym
->attr
.contained
== 0
7536 && sym
->attr
.if_source
== IFSRC_UNKNOWN
)
7537 if ((sym
->attr
.use_assoc
&& bind_c_sym
->mod_name
7538 && strcmp (bind_c_sym
->mod_name
, sym
->module
) != 0)
7539 || sym
->attr
.use_assoc
== 0)
7541 gfc_error ("Binding label '%s' at %L collides with global "
7542 "entity '%s' at %L", sym
->binding_label
,
7543 &(sym
->declared_at
), bind_c_sym
->name
,
7544 &(bind_c_sym
->where
));
7549 /* Clear the binding label to prevent checking multiple times. */
7550 sym
->binding_label
[0] = '\0';
7552 else if (bind_c_sym
== NULL
)
7554 bind_c_sym
= gfc_get_gsymbol (sym
->binding_label
);
7555 bind_c_sym
->where
= sym
->declared_at
;
7556 bind_c_sym
->sym_name
= sym
->name
;
7558 if (sym
->attr
.use_assoc
== 1)
7559 bind_c_sym
->mod_name
= sym
->module
;
7561 if (sym
->ns
->proc_name
!= NULL
)
7562 bind_c_sym
->mod_name
= sym
->ns
->proc_name
->name
;
7564 if (sym
->attr
.contained
== 0)
7566 if (sym
->attr
.subroutine
)
7567 bind_c_sym
->type
= GSYM_SUBROUTINE
;
7568 else if (sym
->attr
.function
)
7569 bind_c_sym
->type
= GSYM_FUNCTION
;
7577 /* Resolve an index expression. */
7580 resolve_index_expr (gfc_expr
*e
)
7582 if (gfc_resolve_expr (e
) == FAILURE
)
7585 if (gfc_simplify_expr (e
, 0) == FAILURE
)
7588 if (gfc_specification_expr (e
) == FAILURE
)
7594 /* Resolve a charlen structure. */
7597 resolve_charlen (gfc_charlen
*cl
)
7606 specification_expr
= 1;
7608 if (resolve_index_expr (cl
->length
) == FAILURE
)
7610 specification_expr
= 0;
7614 /* "If the character length parameter value evaluates to a negative
7615 value, the length of character entities declared is zero." */
7616 if (cl
->length
&& !gfc_extract_int (cl
->length
, &i
) && i
< 0)
7618 gfc_warning_now ("CHARACTER variable has zero length at %L",
7619 &cl
->length
->where
);
7620 gfc_replace_expr (cl
->length
, gfc_int_expr (0));
7623 /* Check that the character length is not too large. */
7624 k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
7625 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
7626 && cl
->length
->ts
.type
== BT_INTEGER
7627 && mpz_cmp (cl
->length
->value
.integer
, gfc_integer_kinds
[k
].huge
) > 0)
7629 gfc_error ("String length at %L is too large", &cl
->length
->where
);
7637 /* Test for non-constant shape arrays. */
7640 is_non_constant_shape_array (gfc_symbol
*sym
)
7646 not_constant
= false;
7647 if (sym
->as
!= NULL
)
7649 /* Unfortunately, !gfc_is_compile_time_shape hits a legal case that
7650 has not been simplified; parameter array references. Do the
7651 simplification now. */
7652 for (i
= 0; i
< sym
->as
->rank
; i
++)
7654 e
= sym
->as
->lower
[i
];
7655 if (e
&& (resolve_index_expr (e
) == FAILURE
7656 || !gfc_is_constant_expr (e
)))
7657 not_constant
= true;
7659 e
= sym
->as
->upper
[i
];
7660 if (e
&& (resolve_index_expr (e
) == FAILURE
7661 || !gfc_is_constant_expr (e
)))
7662 not_constant
= true;
7665 return not_constant
;
7668 /* Given a symbol and an initialization expression, add code to initialize
7669 the symbol to the function entry. */
7671 build_init_assign (gfc_symbol
*sym
, gfc_expr
*init
)
7675 gfc_namespace
*ns
= sym
->ns
;
7677 /* Search for the function namespace if this is a contained
7678 function without an explicit result. */
7679 if (sym
->attr
.function
&& sym
== sym
->result
7680 && sym
->name
!= sym
->ns
->proc_name
->name
)
7683 for (;ns
; ns
= ns
->sibling
)
7684 if (strcmp (ns
->proc_name
->name
, sym
->name
) == 0)
7690 gfc_free_expr (init
);
7694 /* Build an l-value expression for the result. */
7695 lval
= gfc_lval_expr_from_sym (sym
);
7697 /* Add the code at scope entry. */
7698 init_st
= gfc_get_code ();
7699 init_st
->next
= ns
->code
;
7702 /* Assign the default initializer to the l-value. */
7703 init_st
->loc
= sym
->declared_at
;
7704 init_st
->op
= EXEC_INIT_ASSIGN
;
7705 init_st
->expr1
= lval
;
7706 init_st
->expr2
= init
;
7709 /* Assign the default initializer to a derived type variable or result. */
7712 apply_default_init (gfc_symbol
*sym
)
7714 gfc_expr
*init
= NULL
;
7716 if (sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
7719 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
)
7720 init
= gfc_default_initializer (&sym
->ts
);
7725 build_init_assign (sym
, init
);
7728 /* Build an initializer for a local integer, real, complex, logical, or
7729 character variable, based on the command line flags finit-local-zero,
7730 finit-integer=, finit-real=, finit-logical=, and finit-runtime. Returns
7731 null if the symbol should not have a default initialization. */
7733 build_default_init_expr (gfc_symbol
*sym
)
7736 gfc_expr
*init_expr
;
7739 /* These symbols should never have a default initialization. */
7740 if ((sym
->attr
.dimension
&& !gfc_is_compile_time_shape (sym
->as
))
7741 || sym
->attr
.external
7743 || sym
->attr
.pointer
7744 || sym
->attr
.in_equivalence
7745 || sym
->attr
.in_common
7748 || sym
->attr
.cray_pointee
7749 || sym
->attr
.cray_pointer
)
7752 /* Now we'll try to build an initializer expression. */
7753 init_expr
= gfc_get_expr ();
7754 init_expr
->expr_type
= EXPR_CONSTANT
;
7755 init_expr
->ts
.type
= sym
->ts
.type
;
7756 init_expr
->ts
.kind
= sym
->ts
.kind
;
7757 init_expr
->where
= sym
->declared_at
;
7759 /* We will only initialize integers, reals, complex, logicals, and
7760 characters, and only if the corresponding command-line flags
7761 were set. Otherwise, we free init_expr and return null. */
7762 switch (sym
->ts
.type
)
7765 if (gfc_option
.flag_init_integer
!= GFC_INIT_INTEGER_OFF
)
7766 mpz_init_set_si (init_expr
->value
.integer
,
7767 gfc_option
.flag_init_integer_value
);
7770 gfc_free_expr (init_expr
);
7776 mpfr_init (init_expr
->value
.real
);
7777 switch (gfc_option
.flag_init_real
)
7779 case GFC_INIT_REAL_SNAN
:
7780 init_expr
->is_snan
= 1;
7782 case GFC_INIT_REAL_NAN
:
7783 mpfr_set_nan (init_expr
->value
.real
);
7786 case GFC_INIT_REAL_INF
:
7787 mpfr_set_inf (init_expr
->value
.real
, 1);
7790 case GFC_INIT_REAL_NEG_INF
:
7791 mpfr_set_inf (init_expr
->value
.real
, -1);
7794 case GFC_INIT_REAL_ZERO
:
7795 mpfr_set_ui (init_expr
->value
.real
, 0.0, GFC_RND_MODE
);
7799 gfc_free_expr (init_expr
);
7807 mpc_init2 (init_expr
->value
.complex, mpfr_get_default_prec());
7809 mpfr_init (init_expr
->value
.complex.r
);
7810 mpfr_init (init_expr
->value
.complex.i
);
7812 switch (gfc_option
.flag_init_real
)
7814 case GFC_INIT_REAL_SNAN
:
7815 init_expr
->is_snan
= 1;
7817 case GFC_INIT_REAL_NAN
:
7818 mpfr_set_nan (mpc_realref (init_expr
->value
.complex));
7819 mpfr_set_nan (mpc_imagref (init_expr
->value
.complex));
7822 case GFC_INIT_REAL_INF
:
7823 mpfr_set_inf (mpc_realref (init_expr
->value
.complex), 1);
7824 mpfr_set_inf (mpc_imagref (init_expr
->value
.complex), 1);
7827 case GFC_INIT_REAL_NEG_INF
:
7828 mpfr_set_inf (mpc_realref (init_expr
->value
.complex), -1);
7829 mpfr_set_inf (mpc_imagref (init_expr
->value
.complex), -1);
7832 case GFC_INIT_REAL_ZERO
:
7834 mpc_set_ui (init_expr
->value
.complex, 0, GFC_MPC_RND_MODE
);
7836 mpfr_set_ui (init_expr
->value
.complex.r
, 0.0, GFC_RND_MODE
);
7837 mpfr_set_ui (init_expr
->value
.complex.i
, 0.0, GFC_RND_MODE
);
7842 gfc_free_expr (init_expr
);
7849 if (gfc_option
.flag_init_logical
== GFC_INIT_LOGICAL_FALSE
)
7850 init_expr
->value
.logical
= 0;
7851 else if (gfc_option
.flag_init_logical
== GFC_INIT_LOGICAL_TRUE
)
7852 init_expr
->value
.logical
= 1;
7855 gfc_free_expr (init_expr
);
7861 /* For characters, the length must be constant in order to
7862 create a default initializer. */
7863 if (gfc_option
.flag_init_character
== GFC_INIT_CHARACTER_ON
7864 && sym
->ts
.u
.cl
->length
7865 && sym
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
7867 char_len
= mpz_get_si (sym
->ts
.u
.cl
->length
->value
.integer
);
7868 init_expr
->value
.character
.length
= char_len
;
7869 init_expr
->value
.character
.string
= gfc_get_wide_string (char_len
+1);
7870 for (i
= 0; i
< char_len
; i
++)
7871 init_expr
->value
.character
.string
[i
]
7872 = (unsigned char) gfc_option
.flag_init_character_value
;
7876 gfc_free_expr (init_expr
);
7882 gfc_free_expr (init_expr
);
7888 /* Add an initialization expression to a local variable. */
7890 apply_default_init_local (gfc_symbol
*sym
)
7892 gfc_expr
*init
= NULL
;
7894 /* The symbol should be a variable or a function return value. */
7895 if ((sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
7896 || (sym
->attr
.function
&& sym
->result
!= sym
))
7899 /* Try to build the initializer expression. If we can't initialize
7900 this symbol, then init will be NULL. */
7901 init
= build_default_init_expr (sym
);
7905 /* For saved variables, we don't want to add an initializer at
7906 function entry, so we just add a static initializer. */
7907 if (sym
->attr
.save
|| sym
->ns
->save_all
)
7909 /* Don't clobber an existing initializer! */
7910 gcc_assert (sym
->value
== NULL
);
7915 build_init_assign (sym
, init
);
7918 /* Resolution of common features of flavors variable and procedure. */
7921 resolve_fl_var_and_proc (gfc_symbol
*sym
, int mp_flag
)
7923 /* Constraints on deferred shape variable. */
7924 if (sym
->as
== NULL
|| sym
->as
->type
!= AS_DEFERRED
)
7926 if (sym
->attr
.allocatable
)
7928 if (sym
->attr
.dimension
)
7929 gfc_error ("Allocatable array '%s' at %L must have "
7930 "a deferred shape", sym
->name
, &sym
->declared_at
);
7932 gfc_error ("Scalar object '%s' at %L may not be ALLOCATABLE",
7933 sym
->name
, &sym
->declared_at
);
7937 if (sym
->attr
.pointer
&& sym
->attr
.dimension
)
7939 gfc_error ("Array pointer '%s' at %L must have a deferred shape",
7940 sym
->name
, &sym
->declared_at
);
7947 if (!mp_flag
&& !sym
->attr
.allocatable
7948 && !sym
->attr
.pointer
&& !sym
->attr
.dummy
)
7950 gfc_error ("Array '%s' at %L cannot have a deferred shape",
7951 sym
->name
, &sym
->declared_at
);
7959 /* Check if a derived type is extensible. */
7962 type_is_extensible (gfc_symbol
*sym
)
7964 return !(sym
->attr
.is_bind_c
|| sym
->attr
.sequence
);
7968 /* Additional checks for symbols with flavor variable and derived
7969 type. To be called from resolve_fl_variable. */
7972 resolve_fl_variable_derived (gfc_symbol
*sym
, int no_init_flag
)
7974 gcc_assert (sym
->ts
.type
== BT_DERIVED
);
7976 /* Check to see if a derived type is blocked from being host
7977 associated by the presence of another class I symbol in the same
7978 namespace. 14.6.1.3 of the standard and the discussion on
7979 comp.lang.fortran. */
7980 if (sym
->ns
!= sym
->ts
.u
.derived
->ns
7981 && sym
->ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
7984 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 0, &s
);
7985 if (s
&& s
->attr
.flavor
!= FL_DERIVED
)
7987 gfc_error ("The type '%s' cannot be host associated at %L "
7988 "because it is blocked by an incompatible object "
7989 "of the same name declared at %L",
7990 sym
->ts
.u
.derived
->name
, &sym
->declared_at
,
7996 /* 4th constraint in section 11.3: "If an object of a type for which
7997 component-initialization is specified (R429) appears in the
7998 specification-part of a module and does not have the ALLOCATABLE
7999 or POINTER attribute, the object shall have the SAVE attribute."
8001 The check for initializers is performed with
8002 has_default_initializer because gfc_default_initializer generates
8003 a hidden default for allocatable components. */
8004 if (!(sym
->value
|| no_init_flag
) && sym
->ns
->proc_name
8005 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
8006 && !sym
->ns
->save_all
&& !sym
->attr
.save
8007 && !sym
->attr
.pointer
&& !sym
->attr
.allocatable
8008 && has_default_initializer (sym
->ts
.u
.derived
))
8010 gfc_error("Object '%s' at %L must have the SAVE attribute for "
8011 "default initialization of a component",
8012 sym
->name
, &sym
->declared_at
);
8016 if (sym
->ts
.is_class
)
8019 if (!type_is_extensible (sym
->ts
.u
.derived
))
8021 gfc_error ("Type '%s' of CLASS variable '%s' at %L is not extensible",
8022 sym
->ts
.u
.derived
->name
, sym
->name
, &sym
->declared_at
);
8027 if (!(sym
->attr
.dummy
|| sym
->attr
.allocatable
|| sym
->attr
.pointer
))
8029 gfc_error ("CLASS variable '%s' at %L must be dummy, allocatable "
8030 "or pointer", sym
->name
, &sym
->declared_at
);
8035 /* Assign default initializer. */
8036 if (!(sym
->value
|| sym
->attr
.pointer
|| sym
->attr
.allocatable
)
8037 && (!no_init_flag
|| sym
->attr
.intent
== INTENT_OUT
))
8039 sym
->value
= gfc_default_initializer (&sym
->ts
);
8046 /* Resolve symbols with flavor variable. */
8049 resolve_fl_variable (gfc_symbol
*sym
, int mp_flag
)
8051 int no_init_flag
, automatic_flag
;
8053 const char *auto_save_msg
;
8055 auto_save_msg
= "Automatic object '%s' at %L cannot have the "
8058 if (resolve_fl_var_and_proc (sym
, mp_flag
) == FAILURE
)
8061 /* Set this flag to check that variables are parameters of all entries.
8062 This check is effected by the call to gfc_resolve_expr through
8063 is_non_constant_shape_array. */
8064 specification_expr
= 1;
8066 if (sym
->ns
->proc_name
8067 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
8068 || sym
->ns
->proc_name
->attr
.is_main_program
)
8069 && !sym
->attr
.use_assoc
8070 && !sym
->attr
.allocatable
8071 && !sym
->attr
.pointer
8072 && is_non_constant_shape_array (sym
))
8074 /* The shape of a main program or module array needs to be
8076 gfc_error ("The module or main program array '%s' at %L must "
8077 "have constant shape", sym
->name
, &sym
->declared_at
);
8078 specification_expr
= 0;
8082 if (sym
->ts
.type
== BT_CHARACTER
)
8084 /* Make sure that character string variables with assumed length are
8086 e
= sym
->ts
.u
.cl
->length
;
8087 if (e
== NULL
&& !sym
->attr
.dummy
&& !sym
->attr
.result
)
8089 gfc_error ("Entity with assumed character length at %L must be a "
8090 "dummy argument or a PARAMETER", &sym
->declared_at
);
8094 if (e
&& sym
->attr
.save
&& !gfc_is_constant_expr (e
))
8096 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
8100 if (!gfc_is_constant_expr (e
)
8101 && !(e
->expr_type
== EXPR_VARIABLE
8102 && e
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
)
8103 && sym
->ns
->proc_name
8104 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
8105 || sym
->ns
->proc_name
->attr
.is_main_program
)
8106 && !sym
->attr
.use_assoc
)
8108 gfc_error ("'%s' at %L must have constant character length "
8109 "in this context", sym
->name
, &sym
->declared_at
);
8114 if (sym
->value
== NULL
&& sym
->attr
.referenced
)
8115 apply_default_init_local (sym
); /* Try to apply a default initialization. */
8117 /* Determine if the symbol may not have an initializer. */
8118 no_init_flag
= automatic_flag
= 0;
8119 if (sym
->attr
.allocatable
|| sym
->attr
.external
|| sym
->attr
.dummy
8120 || sym
->attr
.intrinsic
|| sym
->attr
.result
)
8122 else if (sym
->attr
.dimension
&& !sym
->attr
.pointer
8123 && is_non_constant_shape_array (sym
))
8125 no_init_flag
= automatic_flag
= 1;
8127 /* Also, they must not have the SAVE attribute.
8128 SAVE_IMPLICIT is checked below. */
8129 if (sym
->attr
.save
== SAVE_EXPLICIT
)
8131 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
8136 /* Ensure that any initializer is simplified. */
8138 gfc_simplify_expr (sym
->value
, 1);
8140 /* Reject illegal initializers. */
8141 if (!sym
->mark
&& sym
->value
)
8143 if (sym
->attr
.allocatable
)
8144 gfc_error ("Allocatable '%s' at %L cannot have an initializer",
8145 sym
->name
, &sym
->declared_at
);
8146 else if (sym
->attr
.external
)
8147 gfc_error ("External '%s' at %L cannot have an initializer",
8148 sym
->name
, &sym
->declared_at
);
8149 else if (sym
->attr
.dummy
8150 && !(sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.intent
== INTENT_OUT
))
8151 gfc_error ("Dummy '%s' at %L cannot have an initializer",
8152 sym
->name
, &sym
->declared_at
);
8153 else if (sym
->attr
.intrinsic
)
8154 gfc_error ("Intrinsic '%s' at %L cannot have an initializer",
8155 sym
->name
, &sym
->declared_at
);
8156 else if (sym
->attr
.result
)
8157 gfc_error ("Function result '%s' at %L cannot have an initializer",
8158 sym
->name
, &sym
->declared_at
);
8159 else if (automatic_flag
)
8160 gfc_error ("Automatic array '%s' at %L cannot have an initializer",
8161 sym
->name
, &sym
->declared_at
);
8168 if (sym
->ts
.type
== BT_DERIVED
)
8169 return resolve_fl_variable_derived (sym
, no_init_flag
);
8175 /* Resolve a procedure. */
8178 resolve_fl_procedure (gfc_symbol
*sym
, int mp_flag
)
8180 gfc_formal_arglist
*arg
;
8182 if (sym
->attr
.ambiguous_interfaces
&& !sym
->attr
.referenced
)
8183 gfc_warning ("Although not referenced, '%s' at %L has ambiguous "
8184 "interfaces", sym
->name
, &sym
->declared_at
);
8186 if (sym
->attr
.function
8187 && resolve_fl_var_and_proc (sym
, mp_flag
) == FAILURE
)
8190 if (sym
->ts
.type
== BT_CHARACTER
)
8192 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
8194 if (cl
&& cl
->length
&& gfc_is_constant_expr (cl
->length
)
8195 && resolve_charlen (cl
) == FAILURE
)
8198 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
8200 if (sym
->attr
.proc
== PROC_ST_FUNCTION
)
8202 gfc_error ("Character-valued statement function '%s' at %L must "
8203 "have constant length", sym
->name
, &sym
->declared_at
);
8207 if (sym
->attr
.external
&& sym
->formal
== NULL
8208 && cl
&& cl
->length
&& cl
->length
->expr_type
!= EXPR_CONSTANT
)
8210 gfc_error ("Automatic character length function '%s' at %L must "
8211 "have an explicit interface", sym
->name
,
8218 /* Ensure that derived type for are not of a private type. Internal
8219 module procedures are excluded by 2.2.3.3 - i.e., they are not
8220 externally accessible and can access all the objects accessible in
8222 if (!(sym
->ns
->parent
8223 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
8224 && gfc_check_access(sym
->attr
.access
, sym
->ns
->default_access
))
8226 gfc_interface
*iface
;
8228 for (arg
= sym
->formal
; arg
; arg
= arg
->next
)
8231 && arg
->sym
->ts
.type
== BT_DERIVED
8232 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
8233 && !gfc_check_access (arg
->sym
->ts
.u
.derived
->attr
.access
,
8234 arg
->sym
->ts
.u
.derived
->ns
->default_access
)
8235 && gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: '%s' is of a "
8236 "PRIVATE type and cannot be a dummy argument"
8237 " of '%s', which is PUBLIC at %L",
8238 arg
->sym
->name
, sym
->name
, &sym
->declared_at
)
8241 /* Stop this message from recurring. */
8242 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
8247 /* PUBLIC interfaces may expose PRIVATE procedures that take types
8248 PRIVATE to the containing module. */
8249 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
8251 for (arg
= iface
->sym
->formal
; arg
; arg
= arg
->next
)
8254 && arg
->sym
->ts
.type
== BT_DERIVED
8255 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
8256 && !gfc_check_access (arg
->sym
->ts
.u
.derived
->attr
.access
,
8257 arg
->sym
->ts
.u
.derived
->ns
->default_access
)
8258 && gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: Procedure "
8259 "'%s' in PUBLIC interface '%s' at %L "
8260 "takes dummy arguments of '%s' which is "
8261 "PRIVATE", iface
->sym
->name
, sym
->name
,
8262 &iface
->sym
->declared_at
,
8263 gfc_typename (&arg
->sym
->ts
)) == FAILURE
)
8265 /* Stop this message from recurring. */
8266 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
8272 /* PUBLIC interfaces may expose PRIVATE procedures that take types
8273 PRIVATE to the containing module. */
8274 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
8276 for (arg
= iface
->sym
->formal
; arg
; arg
= arg
->next
)
8279 && arg
->sym
->ts
.type
== BT_DERIVED
8280 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
8281 && !gfc_check_access (arg
->sym
->ts
.u
.derived
->attr
.access
,
8282 arg
->sym
->ts
.u
.derived
->ns
->default_access
)
8283 && gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: Procedure "
8284 "'%s' in PUBLIC interface '%s' at %L "
8285 "takes dummy arguments of '%s' which is "
8286 "PRIVATE", iface
->sym
->name
, sym
->name
,
8287 &iface
->sym
->declared_at
,
8288 gfc_typename (&arg
->sym
->ts
)) == FAILURE
)
8290 /* Stop this message from recurring. */
8291 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
8298 if (sym
->attr
.function
&& sym
->value
&& sym
->attr
.proc
!= PROC_ST_FUNCTION
8299 && !sym
->attr
.proc_pointer
)
8301 gfc_error ("Function '%s' at %L cannot have an initializer",
8302 sym
->name
, &sym
->declared_at
);
8306 /* An external symbol may not have an initializer because it is taken to be
8307 a procedure. Exception: Procedure Pointers. */
8308 if (sym
->attr
.external
&& sym
->value
&& !sym
->attr
.proc_pointer
)
8310 gfc_error ("External object '%s' at %L may not have an initializer",
8311 sym
->name
, &sym
->declared_at
);
8315 /* An elemental function is required to return a scalar 12.7.1 */
8316 if (sym
->attr
.elemental
&& sym
->attr
.function
&& sym
->as
)
8318 gfc_error ("ELEMENTAL function '%s' at %L must have a scalar "
8319 "result", sym
->name
, &sym
->declared_at
);
8320 /* Reset so that the error only occurs once. */
8321 sym
->attr
.elemental
= 0;
8325 /* 5.1.1.5 of the Standard: A function name declared with an asterisk
8326 char-len-param shall not be array-valued, pointer-valued, recursive
8327 or pure. ....snip... A character value of * may only be used in the
8328 following ways: (i) Dummy arg of procedure - dummy associates with
8329 actual length; (ii) To declare a named constant; or (iii) External
8330 function - but length must be declared in calling scoping unit. */
8331 if (sym
->attr
.function
8332 && sym
->ts
.type
== BT_CHARACTER
8333 && sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
== NULL
)
8335 if ((sym
->as
&& sym
->as
->rank
) || (sym
->attr
.pointer
)
8336 || (sym
->attr
.recursive
) || (sym
->attr
.pure
))
8338 if (sym
->as
&& sym
->as
->rank
)
8339 gfc_error ("CHARACTER(*) function '%s' at %L cannot be "
8340 "array-valued", sym
->name
, &sym
->declared_at
);
8342 if (sym
->attr
.pointer
)
8343 gfc_error ("CHARACTER(*) function '%s' at %L cannot be "
8344 "pointer-valued", sym
->name
, &sym
->declared_at
);
8347 gfc_error ("CHARACTER(*) function '%s' at %L cannot be "
8348 "pure", sym
->name
, &sym
->declared_at
);
8350 if (sym
->attr
.recursive
)
8351 gfc_error ("CHARACTER(*) function '%s' at %L cannot be "
8352 "recursive", sym
->name
, &sym
->declared_at
);
8357 /* Appendix B.2 of the standard. Contained functions give an
8358 error anyway. Fixed-form is likely to be F77/legacy. */
8359 if (!sym
->attr
.contained
&& gfc_current_form
!= FORM_FIXED
)
8360 gfc_notify_std (GFC_STD_F95_OBS
, "Obsolescent feature: "
8361 "CHARACTER(*) function '%s' at %L",
8362 sym
->name
, &sym
->declared_at
);
8365 if (sym
->attr
.is_bind_c
&& sym
->attr
.is_c_interop
!= 1)
8367 gfc_formal_arglist
*curr_arg
;
8368 int has_non_interop_arg
= 0;
8370 if (verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
8371 sym
->common_block
) == FAILURE
)
8373 /* Clear these to prevent looking at them again if there was an
8375 sym
->attr
.is_bind_c
= 0;
8376 sym
->attr
.is_c_interop
= 0;
8377 sym
->ts
.is_c_interop
= 0;
8381 /* So far, no errors have been found. */
8382 sym
->attr
.is_c_interop
= 1;
8383 sym
->ts
.is_c_interop
= 1;
8386 curr_arg
= sym
->formal
;
8387 while (curr_arg
!= NULL
)
8389 /* Skip implicitly typed dummy args here. */
8390 if (curr_arg
->sym
->attr
.implicit_type
== 0)
8391 if (verify_c_interop_param (curr_arg
->sym
) == FAILURE
)
8392 /* If something is found to fail, record the fact so we
8393 can mark the symbol for the procedure as not being
8394 BIND(C) to try and prevent multiple errors being
8396 has_non_interop_arg
= 1;
8398 curr_arg
= curr_arg
->next
;
8401 /* See if any of the arguments were not interoperable and if so, clear
8402 the procedure symbol to prevent duplicate error messages. */
8403 if (has_non_interop_arg
!= 0)
8405 sym
->attr
.is_c_interop
= 0;
8406 sym
->ts
.is_c_interop
= 0;
8407 sym
->attr
.is_bind_c
= 0;
8411 if (!sym
->attr
.proc_pointer
)
8413 if (sym
->attr
.save
== SAVE_EXPLICIT
)
8415 gfc_error ("PROCEDURE attribute conflicts with SAVE attribute "
8416 "in '%s' at %L", sym
->name
, &sym
->declared_at
);
8419 if (sym
->attr
.intent
)
8421 gfc_error ("PROCEDURE attribute conflicts with INTENT attribute "
8422 "in '%s' at %L", sym
->name
, &sym
->declared_at
);
8425 if (sym
->attr
.subroutine
&& sym
->attr
.result
)
8427 gfc_error ("PROCEDURE attribute conflicts with RESULT attribute "
8428 "in '%s' at %L", sym
->name
, &sym
->declared_at
);
8431 if (sym
->attr
.external
&& sym
->attr
.function
8432 && ((sym
->attr
.if_source
== IFSRC_DECL
&& !sym
->attr
.procedure
)
8433 || sym
->attr
.contained
))
8435 gfc_error ("EXTERNAL attribute conflicts with FUNCTION attribute "
8436 "in '%s' at %L", sym
->name
, &sym
->declared_at
);
8439 if (strcmp ("ppr@", sym
->name
) == 0)
8441 gfc_error ("Procedure pointer result '%s' at %L "
8442 "is missing the pointer attribute",
8443 sym
->ns
->proc_name
->name
, &sym
->declared_at
);
8452 /* Resolve a list of finalizer procedures. That is, after they have hopefully
8453 been defined and we now know their defined arguments, check that they fulfill
8454 the requirements of the standard for procedures used as finalizers. */
8457 gfc_resolve_finalizers (gfc_symbol
* derived
)
8459 gfc_finalizer
* list
;
8460 gfc_finalizer
** prev_link
; /* For removing wrong entries from the list. */
8461 gfc_try result
= SUCCESS
;
8462 bool seen_scalar
= false;
8464 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->finalizers
)
8467 /* Walk over the list of finalizer-procedures, check them, and if any one
8468 does not fit in with the standard's definition, print an error and remove
8469 it from the list. */
8470 prev_link
= &derived
->f2k_derived
->finalizers
;
8471 for (list
= derived
->f2k_derived
->finalizers
; list
; list
= *prev_link
)
8477 /* Skip this finalizer if we already resolved it. */
8478 if (list
->proc_tree
)
8480 prev_link
= &(list
->next
);
8484 /* Check this exists and is a SUBROUTINE. */
8485 if (!list
->proc_sym
->attr
.subroutine
)
8487 gfc_error ("FINAL procedure '%s' at %L is not a SUBROUTINE",
8488 list
->proc_sym
->name
, &list
->where
);
8492 /* We should have exactly one argument. */
8493 if (!list
->proc_sym
->formal
|| list
->proc_sym
->formal
->next
)
8495 gfc_error ("FINAL procedure at %L must have exactly one argument",
8499 arg
= list
->proc_sym
->formal
->sym
;
8501 /* This argument must be of our type. */
8502 if (arg
->ts
.type
!= BT_DERIVED
|| arg
->ts
.u
.derived
!= derived
)
8504 gfc_error ("Argument of FINAL procedure at %L must be of type '%s'",
8505 &arg
->declared_at
, derived
->name
);
8509 /* It must neither be a pointer nor allocatable nor optional. */
8510 if (arg
->attr
.pointer
)
8512 gfc_error ("Argument of FINAL procedure at %L must not be a POINTER",
8516 if (arg
->attr
.allocatable
)
8518 gfc_error ("Argument of FINAL procedure at %L must not be"
8519 " ALLOCATABLE", &arg
->declared_at
);
8522 if (arg
->attr
.optional
)
8524 gfc_error ("Argument of FINAL procedure at %L must not be OPTIONAL",
8529 /* It must not be INTENT(OUT). */
8530 if (arg
->attr
.intent
== INTENT_OUT
)
8532 gfc_error ("Argument of FINAL procedure at %L must not be"
8533 " INTENT(OUT)", &arg
->declared_at
);
8537 /* Warn if the procedure is non-scalar and not assumed shape. */
8538 if (gfc_option
.warn_surprising
&& arg
->as
&& arg
->as
->rank
> 0
8539 && arg
->as
->type
!= AS_ASSUMED_SHAPE
)
8540 gfc_warning ("Non-scalar FINAL procedure at %L should have assumed"
8541 " shape argument", &arg
->declared_at
);
8543 /* Check that it does not match in kind and rank with a FINAL procedure
8544 defined earlier. To really loop over the *earlier* declarations,
8545 we need to walk the tail of the list as new ones were pushed at the
8547 /* TODO: Handle kind parameters once they are implemented. */
8548 my_rank
= (arg
->as
? arg
->as
->rank
: 0);
8549 for (i
= list
->next
; i
; i
= i
->next
)
8551 /* Argument list might be empty; that is an error signalled earlier,
8552 but we nevertheless continued resolving. */
8553 if (i
->proc_sym
->formal
)
8555 gfc_symbol
* i_arg
= i
->proc_sym
->formal
->sym
;
8556 const int i_rank
= (i_arg
->as
? i_arg
->as
->rank
: 0);
8557 if (i_rank
== my_rank
)
8559 gfc_error ("FINAL procedure '%s' declared at %L has the same"
8560 " rank (%d) as '%s'",
8561 list
->proc_sym
->name
, &list
->where
, my_rank
,
8568 /* Is this the/a scalar finalizer procedure? */
8569 if (!arg
->as
|| arg
->as
->rank
== 0)
8572 /* Find the symtree for this procedure. */
8573 gcc_assert (!list
->proc_tree
);
8574 list
->proc_tree
= gfc_find_sym_in_symtree (list
->proc_sym
);
8576 prev_link
= &list
->next
;
8579 /* Remove wrong nodes immediately from the list so we don't risk any
8580 troubles in the future when they might fail later expectations. */
8584 *prev_link
= list
->next
;
8585 gfc_free_finalizer (i
);
8588 /* Warn if we haven't seen a scalar finalizer procedure (but we know there
8589 were nodes in the list, must have been for arrays. It is surely a good
8590 idea to have a scalar version there if there's something to finalize. */
8591 if (gfc_option
.warn_surprising
&& result
== SUCCESS
&& !seen_scalar
)
8592 gfc_warning ("Only array FINAL procedures declared for derived type '%s'"
8593 " defined at %L, suggest also scalar one",
8594 derived
->name
, &derived
->declared_at
);
8596 /* TODO: Remove this error when finalization is finished. */
8597 gfc_error ("Finalization at %L is not yet implemented",
8598 &derived
->declared_at
);
8604 /* Check that it is ok for the typebound procedure proc to override the
8608 check_typebound_override (gfc_symtree
* proc
, gfc_symtree
* old
)
8611 const gfc_symbol
* proc_target
;
8612 const gfc_symbol
* old_target
;
8613 unsigned proc_pass_arg
, old_pass_arg
, argpos
;
8614 gfc_formal_arglist
* proc_formal
;
8615 gfc_formal_arglist
* old_formal
;
8617 /* This procedure should only be called for non-GENERIC proc. */
8618 gcc_assert (!proc
->n
.tb
->is_generic
);
8620 /* If the overwritten procedure is GENERIC, this is an error. */
8621 if (old
->n
.tb
->is_generic
)
8623 gfc_error ("Can't overwrite GENERIC '%s' at %L",
8624 old
->name
, &proc
->n
.tb
->where
);
8628 where
= proc
->n
.tb
->where
;
8629 proc_target
= proc
->n
.tb
->u
.specific
->n
.sym
;
8630 old_target
= old
->n
.tb
->u
.specific
->n
.sym
;
8632 /* Check that overridden binding is not NON_OVERRIDABLE. */
8633 if (old
->n
.tb
->non_overridable
)
8635 gfc_error ("'%s' at %L overrides a procedure binding declared"
8636 " NON_OVERRIDABLE", proc
->name
, &where
);
8640 /* It's an error to override a non-DEFERRED procedure with a DEFERRED one. */
8641 if (!old
->n
.tb
->deferred
&& proc
->n
.tb
->deferred
)
8643 gfc_error ("'%s' at %L must not be DEFERRED as it overrides a"
8644 " non-DEFERRED binding", proc
->name
, &where
);
8648 /* If the overridden binding is PURE, the overriding must be, too. */
8649 if (old_target
->attr
.pure
&& !proc_target
->attr
.pure
)
8651 gfc_error ("'%s' at %L overrides a PURE procedure and must also be PURE",
8652 proc
->name
, &where
);
8656 /* If the overridden binding is ELEMENTAL, the overriding must be, too. If it
8657 is not, the overriding must not be either. */
8658 if (old_target
->attr
.elemental
&& !proc_target
->attr
.elemental
)
8660 gfc_error ("'%s' at %L overrides an ELEMENTAL procedure and must also be"
8661 " ELEMENTAL", proc
->name
, &where
);
8664 if (!old_target
->attr
.elemental
&& proc_target
->attr
.elemental
)
8666 gfc_error ("'%s' at %L overrides a non-ELEMENTAL procedure and must not"
8667 " be ELEMENTAL, either", proc
->name
, &where
);
8671 /* If the overridden binding is a SUBROUTINE, the overriding must also be a
8673 if (old_target
->attr
.subroutine
&& !proc_target
->attr
.subroutine
)
8675 gfc_error ("'%s' at %L overrides a SUBROUTINE and must also be a"
8676 " SUBROUTINE", proc
->name
, &where
);
8680 /* If the overridden binding is a FUNCTION, the overriding must also be a
8681 FUNCTION and have the same characteristics. */
8682 if (old_target
->attr
.function
)
8684 if (!proc_target
->attr
.function
)
8686 gfc_error ("'%s' at %L overrides a FUNCTION and must also be a"
8687 " FUNCTION", proc
->name
, &where
);
8691 /* FIXME: Do more comprehensive checking (including, for instance, the
8692 rank and array-shape). */
8693 gcc_assert (proc_target
->result
&& old_target
->result
);
8694 if (!gfc_compare_types (&proc_target
->result
->ts
,
8695 &old_target
->result
->ts
))
8697 gfc_error ("'%s' at %L and the overridden FUNCTION should have"
8698 " matching result types", proc
->name
, &where
);
8703 /* If the overridden binding is PUBLIC, the overriding one must not be
8705 if (old
->n
.tb
->access
== ACCESS_PUBLIC
8706 && proc
->n
.tb
->access
== ACCESS_PRIVATE
)
8708 gfc_error ("'%s' at %L overrides a PUBLIC procedure and must not be"
8709 " PRIVATE", proc
->name
, &where
);
8713 /* Compare the formal argument lists of both procedures. This is also abused
8714 to find the position of the passed-object dummy arguments of both
8715 bindings as at least the overridden one might not yet be resolved and we
8716 need those positions in the check below. */
8717 proc_pass_arg
= old_pass_arg
= 0;
8718 if (!proc
->n
.tb
->nopass
&& !proc
->n
.tb
->pass_arg
)
8720 if (!old
->n
.tb
->nopass
&& !old
->n
.tb
->pass_arg
)
8723 for (proc_formal
= proc_target
->formal
, old_formal
= old_target
->formal
;
8724 proc_formal
&& old_formal
;
8725 proc_formal
= proc_formal
->next
, old_formal
= old_formal
->next
)
8727 if (proc
->n
.tb
->pass_arg
8728 && !strcmp (proc
->n
.tb
->pass_arg
, proc_formal
->sym
->name
))
8729 proc_pass_arg
= argpos
;
8730 if (old
->n
.tb
->pass_arg
8731 && !strcmp (old
->n
.tb
->pass_arg
, old_formal
->sym
->name
))
8732 old_pass_arg
= argpos
;
8734 /* Check that the names correspond. */
8735 if (strcmp (proc_formal
->sym
->name
, old_formal
->sym
->name
))
8737 gfc_error ("Dummy argument '%s' of '%s' at %L should be named '%s' as"
8738 " to match the corresponding argument of the overridden"
8739 " procedure", proc_formal
->sym
->name
, proc
->name
, &where
,
8740 old_formal
->sym
->name
);
8744 /* Check that the types correspond if neither is the passed-object
8746 /* FIXME: Do more comprehensive testing here. */
8747 if (proc_pass_arg
!= argpos
&& old_pass_arg
!= argpos
8748 && !gfc_compare_types (&proc_formal
->sym
->ts
, &old_formal
->sym
->ts
))
8750 gfc_error ("Types mismatch for dummy argument '%s' of '%s' %L in"
8751 " in respect to the overridden procedure",
8752 proc_formal
->sym
->name
, proc
->name
, &where
);
8758 if (proc_formal
|| old_formal
)
8760 gfc_error ("'%s' at %L must have the same number of formal arguments as"
8761 " the overridden procedure", proc
->name
, &where
);
8765 /* If the overridden binding is NOPASS, the overriding one must also be
8767 if (old
->n
.tb
->nopass
&& !proc
->n
.tb
->nopass
)
8769 gfc_error ("'%s' at %L overrides a NOPASS binding and must also be"
8770 " NOPASS", proc
->name
, &where
);
8774 /* If the overridden binding is PASS(x), the overriding one must also be
8775 PASS and the passed-object dummy arguments must correspond. */
8776 if (!old
->n
.tb
->nopass
)
8778 if (proc
->n
.tb
->nopass
)
8780 gfc_error ("'%s' at %L overrides a binding with PASS and must also be"
8781 " PASS", proc
->name
, &where
);
8785 if (proc_pass_arg
!= old_pass_arg
)
8787 gfc_error ("Passed-object dummy argument of '%s' at %L must be at"
8788 " the same position as the passed-object dummy argument of"
8789 " the overridden procedure", proc
->name
, &where
);
8798 /* Check if two GENERIC targets are ambiguous and emit an error is they are. */
8801 check_generic_tbp_ambiguity (gfc_tbp_generic
* t1
, gfc_tbp_generic
* t2
,
8802 const char* generic_name
, locus where
)
8807 gcc_assert (t1
->specific
&& t2
->specific
);
8808 gcc_assert (!t1
->specific
->is_generic
);
8809 gcc_assert (!t2
->specific
->is_generic
);
8811 sym1
= t1
->specific
->u
.specific
->n
.sym
;
8812 sym2
= t2
->specific
->u
.specific
->n
.sym
;
8814 /* Both must be SUBROUTINEs or both must be FUNCTIONs. */
8815 if (sym1
->attr
.subroutine
!= sym2
->attr
.subroutine
8816 || sym1
->attr
.function
!= sym2
->attr
.function
)
8818 gfc_error ("'%s' and '%s' can't be mixed FUNCTION/SUBROUTINE for"
8819 " GENERIC '%s' at %L",
8820 sym1
->name
, sym2
->name
, generic_name
, &where
);
8824 /* Compare the interfaces. */
8825 if (gfc_compare_interfaces (sym1
, sym2
, 1, 0, NULL
, 0))
8827 gfc_error ("'%s' and '%s' for GENERIC '%s' at %L are ambiguous",
8828 sym1
->name
, sym2
->name
, generic_name
, &where
);
8836 /* Worker function for resolving a generic procedure binding; this is used to
8837 resolve GENERIC as well as user and intrinsic OPERATOR typebound procedures.
8839 The difference between those cases is finding possible inherited bindings
8840 that are overridden, as one has to look for them in tb_sym_root,
8841 tb_uop_root or tb_op, respectively. Thus the caller must already find
8842 the super-type and set p->overridden correctly. */
8845 resolve_tb_generic_targets (gfc_symbol
* super_type
,
8846 gfc_typebound_proc
* p
, const char* name
)
8848 gfc_tbp_generic
* target
;
8849 gfc_symtree
* first_target
;
8850 gfc_symtree
* inherited
;
8852 gcc_assert (p
&& p
->is_generic
);
8854 /* Try to find the specific bindings for the symtrees in our target-list. */
8855 gcc_assert (p
->u
.generic
);
8856 for (target
= p
->u
.generic
; target
; target
= target
->next
)
8857 if (!target
->specific
)
8859 gfc_typebound_proc
* overridden_tbp
;
8861 const char* target_name
;
8863 target_name
= target
->specific_st
->name
;
8865 /* Defined for this type directly. */
8866 if (target
->specific_st
->n
.tb
)
8868 target
->specific
= target
->specific_st
->n
.tb
;
8869 goto specific_found
;
8872 /* Look for an inherited specific binding. */
8875 inherited
= gfc_find_typebound_proc (super_type
, NULL
,
8880 gcc_assert (inherited
->n
.tb
);
8881 target
->specific
= inherited
->n
.tb
;
8882 goto specific_found
;
8886 gfc_error ("Undefined specific binding '%s' as target of GENERIC '%s'"
8887 " at %L", target_name
, name
, &p
->where
);
8890 /* Once we've found the specific binding, check it is not ambiguous with
8891 other specifics already found or inherited for the same GENERIC. */
8893 gcc_assert (target
->specific
);
8895 /* This must really be a specific binding! */
8896 if (target
->specific
->is_generic
)
8898 gfc_error ("GENERIC '%s' at %L must target a specific binding,"
8899 " '%s' is GENERIC, too", name
, &p
->where
, target_name
);
8903 /* Check those already resolved on this type directly. */
8904 for (g
= p
->u
.generic
; g
; g
= g
->next
)
8905 if (g
!= target
&& g
->specific
8906 && check_generic_tbp_ambiguity (target
, g
, name
, p
->where
)
8910 /* Check for ambiguity with inherited specific targets. */
8911 for (overridden_tbp
= p
->overridden
; overridden_tbp
;
8912 overridden_tbp
= overridden_tbp
->overridden
)
8913 if (overridden_tbp
->is_generic
)
8915 for (g
= overridden_tbp
->u
.generic
; g
; g
= g
->next
)
8917 gcc_assert (g
->specific
);
8918 if (check_generic_tbp_ambiguity (target
, g
,
8919 name
, p
->where
) == FAILURE
)
8925 /* If we attempt to "overwrite" a specific binding, this is an error. */
8926 if (p
->overridden
&& !p
->overridden
->is_generic
)
8928 gfc_error ("GENERIC '%s' at %L can't overwrite specific binding with"
8929 " the same name", name
, &p
->where
);
8933 /* Take the SUBROUTINE/FUNCTION attributes of the first specific target, as
8934 all must have the same attributes here. */
8935 first_target
= p
->u
.generic
->specific
->u
.specific
;
8936 gcc_assert (first_target
);
8937 p
->subroutine
= first_target
->n
.sym
->attr
.subroutine
;
8938 p
->function
= first_target
->n
.sym
->attr
.function
;
8944 /* Resolve a GENERIC procedure binding for a derived type. */
8947 resolve_typebound_generic (gfc_symbol
* derived
, gfc_symtree
* st
)
8949 gfc_symbol
* super_type
;
8951 /* Find the overridden binding if any. */
8952 st
->n
.tb
->overridden
= NULL
;
8953 super_type
= gfc_get_derived_super_type (derived
);
8956 gfc_symtree
* overridden
;
8957 overridden
= gfc_find_typebound_proc (super_type
, NULL
, st
->name
, true);
8959 if (overridden
&& overridden
->n
.tb
)
8960 st
->n
.tb
->overridden
= overridden
->n
.tb
;
8963 /* Resolve using worker function. */
8964 return resolve_tb_generic_targets (super_type
, st
->n
.tb
, st
->name
);
8968 /* Resolve a type-bound intrinsic operator. */
8971 resolve_typebound_intrinsic_op (gfc_symbol
* derived
, gfc_intrinsic_op op
,
8972 gfc_typebound_proc
* p
)
8974 gfc_symbol
* super_type
;
8975 gfc_tbp_generic
* target
;
8977 /* If there's already an error here, do nothing (but don't fail again). */
8981 /* Operators should always be GENERIC bindings. */
8982 gcc_assert (p
->is_generic
);
8984 /* Look for an overridden binding. */
8985 super_type
= gfc_get_derived_super_type (derived
);
8986 if (super_type
&& super_type
->f2k_derived
)
8987 p
->overridden
= gfc_find_typebound_intrinsic_op (super_type
, NULL
,
8990 p
->overridden
= NULL
;
8992 /* Resolve general GENERIC properties using worker function. */
8993 if (resolve_tb_generic_targets (super_type
, p
, gfc_op2string (op
)) == FAILURE
)
8996 /* Check the targets to be procedures of correct interface. */
8997 for (target
= p
->u
.generic
; target
; target
= target
->next
)
8999 gfc_symbol
* target_proc
;
9001 gcc_assert (target
->specific
&& !target
->specific
->is_generic
);
9002 target_proc
= target
->specific
->u
.specific
->n
.sym
;
9003 gcc_assert (target_proc
);
9005 if (!gfc_check_operator_interface (target_proc
, op
, p
->where
))
9017 /* Resolve a type-bound user operator (tree-walker callback). */
9019 static gfc_symbol
* resolve_bindings_derived
;
9020 static gfc_try resolve_bindings_result
;
9022 static gfc_try
check_uop_procedure (gfc_symbol
* sym
, locus where
);
9025 resolve_typebound_user_op (gfc_symtree
* stree
)
9027 gfc_symbol
* super_type
;
9028 gfc_tbp_generic
* target
;
9030 gcc_assert (stree
&& stree
->n
.tb
);
9032 if (stree
->n
.tb
->error
)
9035 /* Operators should always be GENERIC bindings. */
9036 gcc_assert (stree
->n
.tb
->is_generic
);
9038 /* Find overridden procedure, if any. */
9039 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
9040 if (super_type
&& super_type
->f2k_derived
)
9042 gfc_symtree
* overridden
;
9043 overridden
= gfc_find_typebound_user_op (super_type
, NULL
,
9046 if (overridden
&& overridden
->n
.tb
)
9047 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
9050 stree
->n
.tb
->overridden
= NULL
;
9052 /* Resolve basically using worker function. */
9053 if (resolve_tb_generic_targets (super_type
, stree
->n
.tb
, stree
->name
)
9057 /* Check the targets to be functions of correct interface. */
9058 for (target
= stree
->n
.tb
->u
.generic
; target
; target
= target
->next
)
9060 gfc_symbol
* target_proc
;
9062 gcc_assert (target
->specific
&& !target
->specific
->is_generic
);
9063 target_proc
= target
->specific
->u
.specific
->n
.sym
;
9064 gcc_assert (target_proc
);
9066 if (check_uop_procedure (target_proc
, stree
->n
.tb
->where
) == FAILURE
)
9073 resolve_bindings_result
= FAILURE
;
9074 stree
->n
.tb
->error
= 1;
9078 /* Resolve the type-bound procedures for a derived type. */
9081 resolve_typebound_procedure (gfc_symtree
* stree
)
9086 gfc_symbol
* super_type
;
9087 gfc_component
* comp
;
9091 /* Undefined specific symbol from GENERIC target definition. */
9095 if (stree
->n
.tb
->error
)
9098 /* If this is a GENERIC binding, use that routine. */
9099 if (stree
->n
.tb
->is_generic
)
9101 if (resolve_typebound_generic (resolve_bindings_derived
, stree
)
9107 /* Get the target-procedure to check it. */
9108 gcc_assert (!stree
->n
.tb
->is_generic
);
9109 gcc_assert (stree
->n
.tb
->u
.specific
);
9110 proc
= stree
->n
.tb
->u
.specific
->n
.sym
;
9111 where
= stree
->n
.tb
->where
;
9113 /* Default access should already be resolved from the parser. */
9114 gcc_assert (stree
->n
.tb
->access
!= ACCESS_UNKNOWN
);
9116 /* It should be a module procedure or an external procedure with explicit
9117 interface. For DEFERRED bindings, abstract interfaces are ok as well. */
9118 if ((!proc
->attr
.subroutine
&& !proc
->attr
.function
)
9119 || (proc
->attr
.proc
!= PROC_MODULE
9120 && proc
->attr
.if_source
!= IFSRC_IFBODY
)
9121 || (proc
->attr
.abstract
&& !stree
->n
.tb
->deferred
))
9123 gfc_error ("'%s' must be a module procedure or an external procedure with"
9124 " an explicit interface at %L", proc
->name
, &where
);
9127 stree
->n
.tb
->subroutine
= proc
->attr
.subroutine
;
9128 stree
->n
.tb
->function
= proc
->attr
.function
;
9130 /* Find the super-type of the current derived type. We could do this once and
9131 store in a global if speed is needed, but as long as not I believe this is
9132 more readable and clearer. */
9133 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
9135 /* If PASS, resolve and check arguments if not already resolved / loaded
9136 from a .mod file. */
9137 if (!stree
->n
.tb
->nopass
&& stree
->n
.tb
->pass_arg_num
== 0)
9139 if (stree
->n
.tb
->pass_arg
)
9141 gfc_formal_arglist
* i
;
9143 /* If an explicit passing argument name is given, walk the arg-list
9147 stree
->n
.tb
->pass_arg_num
= 1;
9148 for (i
= proc
->formal
; i
; i
= i
->next
)
9150 if (!strcmp (i
->sym
->name
, stree
->n
.tb
->pass_arg
))
9155 ++stree
->n
.tb
->pass_arg_num
;
9160 gfc_error ("Procedure '%s' with PASS(%s) at %L has no"
9162 proc
->name
, stree
->n
.tb
->pass_arg
, &where
,
9163 stree
->n
.tb
->pass_arg
);
9169 /* Otherwise, take the first one; there should in fact be at least
9171 stree
->n
.tb
->pass_arg_num
= 1;
9174 gfc_error ("Procedure '%s' with PASS at %L must have at"
9175 " least one argument", proc
->name
, &where
);
9178 me_arg
= proc
->formal
->sym
;
9181 /* Now check that the argument-type matches. */
9182 gcc_assert (me_arg
);
9183 if (me_arg
->ts
.type
!= BT_DERIVED
9184 || me_arg
->ts
.u
.derived
!= resolve_bindings_derived
)
9186 gfc_error ("Argument '%s' of '%s' with PASS(%s) at %L must be of"
9187 " the derived-type '%s'", me_arg
->name
, proc
->name
,
9188 me_arg
->name
, &where
, resolve_bindings_derived
->name
);
9192 if (!me_arg
->ts
.is_class
)
9194 gfc_error ("Non-polymorphic passed-object dummy argument of '%s'"
9195 " at %L", proc
->name
, &where
);
9200 /* If we are extending some type, check that we don't override a procedure
9201 flagged NON_OVERRIDABLE. */
9202 stree
->n
.tb
->overridden
= NULL
;
9205 gfc_symtree
* overridden
;
9206 overridden
= gfc_find_typebound_proc (super_type
, NULL
,
9209 if (overridden
&& overridden
->n
.tb
)
9210 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
9212 if (overridden
&& check_typebound_override (stree
, overridden
) == FAILURE
)
9216 /* See if there's a name collision with a component directly in this type. */
9217 for (comp
= resolve_bindings_derived
->components
; comp
; comp
= comp
->next
)
9218 if (!strcmp (comp
->name
, stree
->name
))
9220 gfc_error ("Procedure '%s' at %L has the same name as a component of"
9222 stree
->name
, &where
, resolve_bindings_derived
->name
);
9226 /* Try to find a name collision with an inherited component. */
9227 if (super_type
&& gfc_find_component (super_type
, stree
->name
, true, true))
9229 gfc_error ("Procedure '%s' at %L has the same name as an inherited"
9230 " component of '%s'",
9231 stree
->name
, &where
, resolve_bindings_derived
->name
);
9235 stree
->n
.tb
->error
= 0;
9239 resolve_bindings_result
= FAILURE
;
9240 stree
->n
.tb
->error
= 1;
9244 resolve_typebound_procedures (gfc_symbol
* derived
)
9249 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->tb_sym_root
)
9252 resolve_bindings_derived
= derived
;
9253 resolve_bindings_result
= SUCCESS
;
9255 if (derived
->f2k_derived
->tb_sym_root
)
9256 gfc_traverse_symtree (derived
->f2k_derived
->tb_sym_root
,
9257 &resolve_typebound_procedure
);
9259 found_op
= (derived
->f2k_derived
->tb_uop_root
!= NULL
);
9260 if (derived
->f2k_derived
->tb_uop_root
)
9261 gfc_traverse_symtree (derived
->f2k_derived
->tb_uop_root
,
9262 &resolve_typebound_user_op
);
9264 for (op
= 0; op
!= GFC_INTRINSIC_OPS
; ++op
)
9266 gfc_typebound_proc
* p
= derived
->f2k_derived
->tb_op
[op
];
9267 if (p
&& resolve_typebound_intrinsic_op (derived
, (gfc_intrinsic_op
) op
,
9269 resolve_bindings_result
= FAILURE
;
9274 /* FIXME: Remove this (and found_op) once calls are fully implemented. */
9277 gfc_error ("Derived type '%s' at %L contains type-bound OPERATOR's,"
9278 " they are not yet implemented.",
9279 derived
->name
, &derived
->declared_at
);
9280 resolve_bindings_result
= FAILURE
;
9283 return resolve_bindings_result
;
9287 /* Add a derived type to the dt_list. The dt_list is used in trans-types.c
9288 to give all identical derived types the same backend_decl. */
9290 add_dt_to_dt_list (gfc_symbol
*derived
)
9292 gfc_dt_list
*dt_list
;
9294 for (dt_list
= gfc_derived_types
; dt_list
; dt_list
= dt_list
->next
)
9295 if (derived
== dt_list
->derived
)
9298 if (dt_list
== NULL
)
9300 dt_list
= gfc_get_dt_list ();
9301 dt_list
->next
= gfc_derived_types
;
9302 dt_list
->derived
= derived
;
9303 gfc_derived_types
= dt_list
;
9308 /* Ensure that a derived-type is really not abstract, meaning that every
9309 inherited DEFERRED binding is overridden by a non-DEFERRED one. */
9312 ensure_not_abstract_walker (gfc_symbol
* sub
, gfc_symtree
* st
)
9317 if (ensure_not_abstract_walker (sub
, st
->left
) == FAILURE
)
9319 if (ensure_not_abstract_walker (sub
, st
->right
) == FAILURE
)
9322 if (st
->n
.tb
&& st
->n
.tb
->deferred
)
9324 gfc_symtree
* overriding
;
9325 overriding
= gfc_find_typebound_proc (sub
, NULL
, st
->name
, true);
9326 gcc_assert (overriding
&& overriding
->n
.tb
);
9327 if (overriding
->n
.tb
->deferred
)
9329 gfc_error ("Derived-type '%s' declared at %L must be ABSTRACT because"
9330 " '%s' is DEFERRED and not overridden",
9331 sub
->name
, &sub
->declared_at
, st
->name
);
9340 ensure_not_abstract (gfc_symbol
* sub
, gfc_symbol
* ancestor
)
9342 /* The algorithm used here is to recursively travel up the ancestry of sub
9343 and for each ancestor-type, check all bindings. If any of them is
9344 DEFERRED, look it up starting from sub and see if the found (overriding)
9345 binding is not DEFERRED.
9346 This is not the most efficient way to do this, but it should be ok and is
9347 clearer than something sophisticated. */
9349 gcc_assert (ancestor
&& ancestor
->attr
.abstract
&& !sub
->attr
.abstract
);
9351 /* Walk bindings of this ancestor. */
9352 if (ancestor
->f2k_derived
)
9355 t
= ensure_not_abstract_walker (sub
, ancestor
->f2k_derived
->tb_sym_root
);
9360 /* Find next ancestor type and recurse on it. */
9361 ancestor
= gfc_get_derived_super_type (ancestor
);
9363 return ensure_not_abstract (sub
, ancestor
);
9369 static void resolve_symbol (gfc_symbol
*sym
);
9372 /* Resolve the components of a derived type. */
9375 resolve_fl_derived (gfc_symbol
*sym
)
9377 gfc_symbol
* super_type
;
9381 super_type
= gfc_get_derived_super_type (sym
);
9383 /* Ensure the extended type gets resolved before we do. */
9384 if (super_type
&& resolve_fl_derived (super_type
) == FAILURE
)
9387 /* An ABSTRACT type must be extensible. */
9388 if (sym
->attr
.abstract
&& !type_is_extensible (sym
))
9390 gfc_error ("Non-extensible derived-type '%s' at %L must not be ABSTRACT",
9391 sym
->name
, &sym
->declared_at
);
9395 for (c
= sym
->components
; c
!= NULL
; c
= c
->next
)
9397 if (c
->attr
.proc_pointer
&& c
->ts
.interface
)
9399 if (c
->ts
.interface
->attr
.procedure
)
9400 gfc_error ("Interface '%s', used by procedure pointer component "
9401 "'%s' at %L, is declared in a later PROCEDURE statement",
9402 c
->ts
.interface
->name
, c
->name
, &c
->loc
);
9404 /* Get the attributes from the interface (now resolved). */
9405 if (c
->ts
.interface
->attr
.if_source
9406 || c
->ts
.interface
->attr
.intrinsic
)
9408 gfc_symbol
*ifc
= c
->ts
.interface
;
9410 if (ifc
->formal
&& !ifc
->formal_ns
)
9411 resolve_symbol (ifc
);
9413 if (ifc
->attr
.intrinsic
)
9414 resolve_intrinsic (ifc
, &ifc
->declared_at
);
9418 c
->ts
= ifc
->result
->ts
;
9419 c
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
9420 c
->attr
.pointer
= ifc
->result
->attr
.pointer
;
9421 c
->attr
.dimension
= ifc
->result
->attr
.dimension
;
9422 c
->as
= gfc_copy_array_spec (ifc
->result
->as
);
9427 c
->attr
.allocatable
= ifc
->attr
.allocatable
;
9428 c
->attr
.pointer
= ifc
->attr
.pointer
;
9429 c
->attr
.dimension
= ifc
->attr
.dimension
;
9430 c
->as
= gfc_copy_array_spec (ifc
->as
);
9432 c
->ts
.interface
= ifc
;
9433 c
->attr
.function
= ifc
->attr
.function
;
9434 c
->attr
.subroutine
= ifc
->attr
.subroutine
;
9435 gfc_copy_formal_args_ppc (c
, ifc
);
9437 c
->attr
.pure
= ifc
->attr
.pure
;
9438 c
->attr
.elemental
= ifc
->attr
.elemental
;
9439 c
->attr
.recursive
= ifc
->attr
.recursive
;
9440 c
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
9441 c
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
9442 /* Replace symbols in array spec. */
9446 for (i
= 0; i
< c
->as
->rank
; i
++)
9448 gfc_expr_replace_comp (c
->as
->lower
[i
], c
);
9449 gfc_expr_replace_comp (c
->as
->upper
[i
], c
);
9452 /* Copy char length. */
9453 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
9455 c
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
9456 /* TODO: gfc_expr_replace_symbols (c->ts.u.cl->length, c);*/
9459 else if (c
->ts
.interface
->name
[0] != '\0')
9461 gfc_error ("Interface '%s' of procedure pointer component "
9462 "'%s' at %L must be explicit", c
->ts
.interface
->name
,
9467 else if (c
->attr
.proc_pointer
&& c
->ts
.type
== BT_UNKNOWN
)
9469 c
->ts
= *gfc_get_default_type (c
->name
, NULL
);
9470 c
->attr
.implicit_type
= 1;
9473 /* Procedure pointer components: Check PASS arg. */
9474 if (c
->attr
.proc_pointer
&& !c
->tb
->nopass
&& c
->tb
->pass_arg_num
== 0)
9478 if (c
->tb
->pass_arg
)
9480 gfc_formal_arglist
* i
;
9482 /* If an explicit passing argument name is given, walk the arg-list
9486 c
->tb
->pass_arg_num
= 1;
9487 for (i
= c
->formal
; i
; i
= i
->next
)
9489 if (!strcmp (i
->sym
->name
, c
->tb
->pass_arg
))
9494 c
->tb
->pass_arg_num
++;
9499 gfc_error ("Procedure pointer component '%s' with PASS(%s) "
9500 "at %L has no argument '%s'", c
->name
,
9501 c
->tb
->pass_arg
, &c
->loc
, c
->tb
->pass_arg
);
9508 /* Otherwise, take the first one; there should in fact be at least
9510 c
->tb
->pass_arg_num
= 1;
9513 gfc_error ("Procedure pointer component '%s' with PASS at %L "
9514 "must have at least one argument",
9519 me_arg
= c
->formal
->sym
;
9522 /* Now check that the argument-type matches. */
9523 gcc_assert (me_arg
);
9524 if (me_arg
->ts
.type
!= BT_DERIVED
9525 || me_arg
->ts
.u
.derived
!= sym
)
9527 gfc_error ("Argument '%s' of '%s' with PASS(%s) at %L must be of"
9528 " the derived type '%s'", me_arg
->name
, c
->name
,
9529 me_arg
->name
, &c
->loc
, sym
->name
);
9534 /* Check for C453. */
9535 if (me_arg
->attr
.dimension
)
9537 gfc_error ("Argument '%s' of '%s' with PASS(%s) at %L "
9538 "must be scalar", me_arg
->name
, c
->name
, me_arg
->name
,
9544 if (me_arg
->attr
.pointer
)
9546 gfc_error ("Argument '%s' of '%s' with PASS(%s) at %L "
9547 "may not have the POINTER attribute", me_arg
->name
,
9548 c
->name
, me_arg
->name
, &c
->loc
);
9553 if (me_arg
->attr
.allocatable
)
9555 gfc_error ("Argument '%s' of '%s' with PASS(%s) at %L "
9556 "may not be ALLOCATABLE", me_arg
->name
, c
->name
,
9557 me_arg
->name
, &c
->loc
);
9562 if (type_is_extensible (sym
) && !me_arg
->ts
.is_class
)
9563 gfc_error ("Non-polymorphic passed-object dummy argument of '%s'"
9564 " at %L", c
->name
, &c
->loc
);
9568 /* Check type-spec if this is not the parent-type component. */
9569 if ((!sym
->attr
.extension
|| c
!= sym
->components
)
9570 && resolve_typespec_used (&c
->ts
, &c
->loc
, c
->name
) == FAILURE
)
9573 /* If this type is an extension, see if this component has the same name
9574 as an inherited type-bound procedure. */
9576 && gfc_find_typebound_proc (super_type
, NULL
, c
->name
, true))
9578 gfc_error ("Component '%s' of '%s' at %L has the same name as an"
9579 " inherited type-bound procedure",
9580 c
->name
, sym
->name
, &c
->loc
);
9584 if (c
->ts
.type
== BT_CHARACTER
)
9586 if (c
->ts
.u
.cl
->length
== NULL
9587 || (resolve_charlen (c
->ts
.u
.cl
) == FAILURE
)
9588 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
))
9590 gfc_error ("Character length of component '%s' needs to "
9591 "be a constant specification expression at %L",
9593 c
->ts
.u
.cl
->length
? &c
->ts
.u
.cl
->length
->where
: &c
->loc
);
9598 if (c
->ts
.type
== BT_DERIVED
9599 && sym
->component_access
!= ACCESS_PRIVATE
9600 && gfc_check_access (sym
->attr
.access
, sym
->ns
->default_access
)
9601 && !is_sym_host_assoc (c
->ts
.u
.derived
, sym
->ns
)
9602 && !c
->ts
.u
.derived
->attr
.use_assoc
9603 && !gfc_check_access (c
->ts
.u
.derived
->attr
.access
,
9604 c
->ts
.u
.derived
->ns
->default_access
)
9605 && gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: the component '%s' "
9606 "is a PRIVATE type and cannot be a component of "
9607 "'%s', which is PUBLIC at %L", c
->name
,
9608 sym
->name
, &sym
->declared_at
) == FAILURE
)
9611 if (sym
->attr
.sequence
)
9613 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.sequence
== 0)
9615 gfc_error ("Component %s of SEQUENCE type declared at %L does "
9616 "not have the SEQUENCE attribute",
9617 c
->ts
.u
.derived
->name
, &sym
->declared_at
);
9622 if (c
->ts
.type
== BT_DERIVED
&& c
->attr
.pointer
9623 && c
->ts
.u
.derived
->components
== NULL
9624 && !c
->ts
.u
.derived
->attr
.zero_comp
)
9626 gfc_error ("The pointer component '%s' of '%s' at %L is a type "
9627 "that has not been declared", c
->name
, sym
->name
,
9633 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.is_class
9634 && !(c
->attr
.pointer
|| c
->attr
.allocatable
))
9636 gfc_error ("Component '%s' with CLASS at %L must be allocatable "
9637 "or pointer", c
->name
, &c
->loc
);
9641 /* Ensure that all the derived type components are put on the
9642 derived type list; even in formal namespaces, where derived type
9643 pointer components might not have been declared. */
9644 if (c
->ts
.type
== BT_DERIVED
9646 && c
->ts
.u
.derived
->components
9648 && sym
!= c
->ts
.u
.derived
)
9649 add_dt_to_dt_list (c
->ts
.u
.derived
);
9651 if (c
->attr
.pointer
|| c
->attr
.proc_pointer
|| c
->attr
.allocatable
9655 for (i
= 0; i
< c
->as
->rank
; i
++)
9657 if (c
->as
->lower
[i
] == NULL
9658 || (resolve_index_expr (c
->as
->lower
[i
]) == FAILURE
)
9659 || !gfc_is_constant_expr (c
->as
->lower
[i
])
9660 || c
->as
->upper
[i
] == NULL
9661 || (resolve_index_expr (c
->as
->upper
[i
]) == FAILURE
)
9662 || !gfc_is_constant_expr (c
->as
->upper
[i
]))
9664 gfc_error ("Component '%s' of '%s' at %L must have "
9665 "constant array bounds",
9666 c
->name
, sym
->name
, &c
->loc
);
9672 /* Resolve the type-bound procedures. */
9673 if (resolve_typebound_procedures (sym
) == FAILURE
)
9676 /* Resolve the finalizer procedures. */
9677 if (gfc_resolve_finalizers (sym
) == FAILURE
)
9680 /* If this is a non-ABSTRACT type extending an ABSTRACT one, ensure that
9681 all DEFERRED bindings are overridden. */
9682 if (super_type
&& super_type
->attr
.abstract
&& !sym
->attr
.abstract
9683 && ensure_not_abstract (sym
, super_type
) == FAILURE
)
9686 /* Add derived type to the derived type list. */
9687 add_dt_to_dt_list (sym
);
9694 resolve_fl_namelist (gfc_symbol
*sym
)
9699 /* Reject PRIVATE objects in a PUBLIC namelist. */
9700 if (gfc_check_access(sym
->attr
.access
, sym
->ns
->default_access
))
9702 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
9704 if (!nl
->sym
->attr
.use_assoc
9705 && !is_sym_host_assoc (nl
->sym
, sym
->ns
)
9706 && !gfc_check_access(nl
->sym
->attr
.access
,
9707 nl
->sym
->ns
->default_access
))
9709 gfc_error ("NAMELIST object '%s' was declared PRIVATE and "
9710 "cannot be member of PUBLIC namelist '%s' at %L",
9711 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
9715 /* Types with private components that came here by USE-association. */
9716 if (nl
->sym
->ts
.type
== BT_DERIVED
9717 && derived_inaccessible (nl
->sym
->ts
.u
.derived
))
9719 gfc_error ("NAMELIST object '%s' has use-associated PRIVATE "
9720 "components and cannot be member of namelist '%s' at %L",
9721 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
9725 /* Types with private components that are defined in the same module. */
9726 if (nl
->sym
->ts
.type
== BT_DERIVED
9727 && !is_sym_host_assoc (nl
->sym
->ts
.u
.derived
, sym
->ns
)
9728 && !gfc_check_access (nl
->sym
->ts
.u
.derived
->attr
.private_comp
9729 ? ACCESS_PRIVATE
: ACCESS_UNKNOWN
,
9730 nl
->sym
->ns
->default_access
))
9732 gfc_error ("NAMELIST object '%s' has PRIVATE components and "
9733 "cannot be a member of PUBLIC namelist '%s' at %L",
9734 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
9740 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
9742 /* Reject namelist arrays of assumed shape. */
9743 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SHAPE
9744 && gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object '%s' "
9745 "must not have assumed shape in namelist "
9746 "'%s' at %L", nl
->sym
->name
, sym
->name
,
9747 &sym
->declared_at
) == FAILURE
)
9750 /* Reject namelist arrays that are not constant shape. */
9751 if (is_non_constant_shape_array (nl
->sym
))
9753 gfc_error ("NAMELIST array object '%s' must have constant "
9754 "shape in namelist '%s' at %L", nl
->sym
->name
,
9755 sym
->name
, &sym
->declared_at
);
9759 /* Namelist objects cannot have allocatable or pointer components. */
9760 if (nl
->sym
->ts
.type
!= BT_DERIVED
)
9763 if (nl
->sym
->ts
.u
.derived
->attr
.alloc_comp
)
9765 gfc_error ("NAMELIST object '%s' in namelist '%s' at %L cannot "
9766 "have ALLOCATABLE components",
9767 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
9771 if (nl
->sym
->ts
.u
.derived
->attr
.pointer_comp
)
9773 gfc_error ("NAMELIST object '%s' in namelist '%s' at %L cannot "
9774 "have POINTER components",
9775 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
9781 /* 14.1.2 A module or internal procedure represent local entities
9782 of the same type as a namelist member and so are not allowed. */
9783 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
9785 if (nl
->sym
->ts
.kind
!= 0 && nl
->sym
->attr
.flavor
== FL_VARIABLE
)
9788 if (nl
->sym
->attr
.function
&& nl
->sym
== nl
->sym
->result
)
9789 if ((nl
->sym
== sym
->ns
->proc_name
)
9791 (sym
->ns
->parent
&& nl
->sym
== sym
->ns
->parent
->proc_name
))
9795 if (nl
->sym
&& nl
->sym
->name
)
9796 gfc_find_symbol (nl
->sym
->name
, sym
->ns
, 1, &nlsym
);
9797 if (nlsym
&& nlsym
->attr
.flavor
== FL_PROCEDURE
)
9799 gfc_error ("PROCEDURE attribute conflicts with NAMELIST "
9800 "attribute in '%s' at %L", nlsym
->name
,
9811 resolve_fl_parameter (gfc_symbol
*sym
)
9813 /* A parameter array's shape needs to be constant. */
9815 && (sym
->as
->type
== AS_DEFERRED
9816 || is_non_constant_shape_array (sym
)))
9818 gfc_error ("Parameter array '%s' at %L cannot be automatic "
9819 "or of deferred shape", sym
->name
, &sym
->declared_at
);
9823 /* Make sure a parameter that has been implicitly typed still
9824 matches the implicit type, since PARAMETER statements can precede
9825 IMPLICIT statements. */
9826 if (sym
->attr
.implicit_type
9827 && !gfc_compare_types (&sym
->ts
, gfc_get_default_type (sym
->name
,
9830 gfc_error ("Implicitly typed PARAMETER '%s' at %L doesn't match a "
9831 "later IMPLICIT type", sym
->name
, &sym
->declared_at
);
9835 /* Make sure the types of derived parameters are consistent. This
9836 type checking is deferred until resolution because the type may
9837 refer to a derived type from the host. */
9838 if (sym
->ts
.type
== BT_DERIVED
9839 && !gfc_compare_types (&sym
->ts
, &sym
->value
->ts
))
9841 gfc_error ("Incompatible derived type in PARAMETER at %L",
9842 &sym
->value
->where
);
9849 /* Do anything necessary to resolve a symbol. Right now, we just
9850 assume that an otherwise unknown symbol is a variable. This sort
9851 of thing commonly happens for symbols in module. */
9854 resolve_symbol (gfc_symbol
*sym
)
9856 int check_constant
, mp_flag
;
9857 gfc_symtree
*symtree
;
9858 gfc_symtree
*this_symtree
;
9862 if (sym
->attr
.flavor
== FL_UNKNOWN
)
9865 /* If we find that a flavorless symbol is an interface in one of the
9866 parent namespaces, find its symtree in this namespace, free the
9867 symbol and set the symtree to point to the interface symbol. */
9868 for (ns
= gfc_current_ns
->parent
; ns
; ns
= ns
->parent
)
9870 symtree
= gfc_find_symtree (ns
->sym_root
, sym
->name
);
9871 if (symtree
&& symtree
->n
.sym
->generic
)
9873 this_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
9877 gfc_free_symbol (sym
);
9878 symtree
->n
.sym
->refs
++;
9879 this_symtree
->n
.sym
= symtree
->n
.sym
;
9884 /* Otherwise give it a flavor according to such attributes as
9886 if (sym
->attr
.external
== 0 && sym
->attr
.intrinsic
== 0)
9887 sym
->attr
.flavor
= FL_VARIABLE
;
9890 sym
->attr
.flavor
= FL_PROCEDURE
;
9891 if (sym
->attr
.dimension
)
9892 sym
->attr
.function
= 1;
9896 if (sym
->attr
.external
&& sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.function
)
9897 gfc_add_function (&sym
->attr
, sym
->name
, &sym
->declared_at
);
9899 if (sym
->attr
.procedure
&& sym
->ts
.interface
9900 && sym
->attr
.if_source
!= IFSRC_DECL
)
9902 if (sym
->ts
.interface
== sym
)
9904 gfc_error ("PROCEDURE '%s' at %L may not be used as its own "
9905 "interface", sym
->name
, &sym
->declared_at
);
9908 if (sym
->ts
.interface
->attr
.procedure
)
9910 gfc_error ("Interface '%s', used by procedure '%s' at %L, is declared"
9911 " in a later PROCEDURE statement", sym
->ts
.interface
->name
,
9912 sym
->name
,&sym
->declared_at
);
9916 /* Get the attributes from the interface (now resolved). */
9917 if (sym
->ts
.interface
->attr
.if_source
9918 || sym
->ts
.interface
->attr
.intrinsic
)
9920 gfc_symbol
*ifc
= sym
->ts
.interface
;
9921 resolve_symbol (ifc
);
9923 if (ifc
->attr
.intrinsic
)
9924 resolve_intrinsic (ifc
, &ifc
->declared_at
);
9927 sym
->ts
= ifc
->result
->ts
;
9930 sym
->ts
.interface
= ifc
;
9931 sym
->attr
.function
= ifc
->attr
.function
;
9932 sym
->attr
.subroutine
= ifc
->attr
.subroutine
;
9933 gfc_copy_formal_args (sym
, ifc
);
9935 sym
->attr
.allocatable
= ifc
->attr
.allocatable
;
9936 sym
->attr
.pointer
= ifc
->attr
.pointer
;
9937 sym
->attr
.pure
= ifc
->attr
.pure
;
9938 sym
->attr
.elemental
= ifc
->attr
.elemental
;
9939 sym
->attr
.dimension
= ifc
->attr
.dimension
;
9940 sym
->attr
.recursive
= ifc
->attr
.recursive
;
9941 sym
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
9942 sym
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
9943 /* Copy array spec. */
9944 sym
->as
= gfc_copy_array_spec (ifc
->as
);
9948 for (i
= 0; i
< sym
->as
->rank
; i
++)
9950 gfc_expr_replace_symbols (sym
->as
->lower
[i
], sym
);
9951 gfc_expr_replace_symbols (sym
->as
->upper
[i
], sym
);
9954 /* Copy char length. */
9955 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
9957 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
9958 gfc_expr_replace_symbols (sym
->ts
.u
.cl
->length
, sym
);
9961 else if (sym
->ts
.interface
->name
[0] != '\0')
9963 gfc_error ("Interface '%s' of procedure '%s' at %L must be explicit",
9964 sym
->ts
.interface
->name
, sym
->name
, &sym
->declared_at
);
9969 if (sym
->attr
.flavor
== FL_DERIVED
&& resolve_fl_derived (sym
) == FAILURE
)
9972 /* Symbols that are module procedures with results (functions) have
9973 the types and array specification copied for type checking in
9974 procedures that call them, as well as for saving to a module
9975 file. These symbols can't stand the scrutiny that their results
9977 mp_flag
= (sym
->result
!= NULL
&& sym
->result
!= sym
);
9980 /* Make sure that the intrinsic is consistent with its internal
9981 representation. This needs to be done before assigning a default
9982 type to avoid spurious warnings. */
9983 if (sym
->attr
.flavor
!= FL_MODULE
&& sym
->attr
.intrinsic
9984 && resolve_intrinsic (sym
, &sym
->declared_at
) == FAILURE
)
9987 /* Assign default type to symbols that need one and don't have one. */
9988 if (sym
->ts
.type
== BT_UNKNOWN
)
9990 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
)
9991 gfc_set_default_type (sym
, 1, NULL
);
9993 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.external
9994 && !sym
->attr
.function
&& !sym
->attr
.subroutine
9995 && gfc_get_default_type (sym
->name
, sym
->ns
)->type
== BT_UNKNOWN
)
9996 gfc_add_subroutine (&sym
->attr
, sym
->name
, &sym
->declared_at
);
9998 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
10000 /* The specific case of an external procedure should emit an error
10001 in the case that there is no implicit type. */
10003 gfc_set_default_type (sym
, sym
->attr
.external
, NULL
);
10006 /* Result may be in another namespace. */
10007 resolve_symbol (sym
->result
);
10009 if (!sym
->result
->attr
.proc_pointer
)
10011 sym
->ts
= sym
->result
->ts
;
10012 sym
->as
= gfc_copy_array_spec (sym
->result
->as
);
10013 sym
->attr
.dimension
= sym
->result
->attr
.dimension
;
10014 sym
->attr
.pointer
= sym
->result
->attr
.pointer
;
10015 sym
->attr
.allocatable
= sym
->result
->attr
.allocatable
;
10021 /* Assumed size arrays and assumed shape arrays must be dummy
10024 if (sym
->as
!= NULL
10025 && (sym
->as
->type
== AS_ASSUMED_SIZE
10026 || sym
->as
->type
== AS_ASSUMED_SHAPE
)
10027 && sym
->attr
.dummy
== 0)
10029 if (sym
->as
->type
== AS_ASSUMED_SIZE
)
10030 gfc_error ("Assumed size array at %L must be a dummy argument",
10031 &sym
->declared_at
);
10033 gfc_error ("Assumed shape array at %L must be a dummy argument",
10034 &sym
->declared_at
);
10038 /* Make sure symbols with known intent or optional are really dummy
10039 variable. Because of ENTRY statement, this has to be deferred
10040 until resolution time. */
10042 if (!sym
->attr
.dummy
10043 && (sym
->attr
.optional
|| sym
->attr
.intent
!= INTENT_UNKNOWN
))
10045 gfc_error ("Symbol at %L is not a DUMMY variable", &sym
->declared_at
);
10049 if (sym
->attr
.value
&& !sym
->attr
.dummy
)
10051 gfc_error ("'%s' at %L cannot have the VALUE attribute because "
10052 "it is not a dummy argument", sym
->name
, &sym
->declared_at
);
10056 if (sym
->attr
.value
&& sym
->ts
.type
== BT_CHARACTER
)
10058 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
10059 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
10061 gfc_error ("Character dummy variable '%s' at %L with VALUE "
10062 "attribute must have constant length",
10063 sym
->name
, &sym
->declared_at
);
10067 if (sym
->ts
.is_c_interop
10068 && mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
10070 gfc_error ("C interoperable character dummy variable '%s' at %L "
10071 "with VALUE attribute must have length one",
10072 sym
->name
, &sym
->declared_at
);
10077 /* If the symbol is marked as bind(c), verify it's type and kind. Do not
10078 do this for something that was implicitly typed because that is handled
10079 in gfc_set_default_type. Handle dummy arguments and procedure
10080 definitions separately. Also, anything that is use associated is not
10081 handled here but instead is handled in the module it is declared in.
10082 Finally, derived type definitions are allowed to be BIND(C) since that
10083 only implies that they're interoperable, and they are checked fully for
10084 interoperability when a variable is declared of that type. */
10085 if (sym
->attr
.is_bind_c
&& sym
->attr
.implicit_type
== 0 &&
10086 sym
->attr
.use_assoc
== 0 && sym
->attr
.dummy
== 0 &&
10087 sym
->attr
.flavor
!= FL_PROCEDURE
&& sym
->attr
.flavor
!= FL_DERIVED
)
10089 gfc_try t
= SUCCESS
;
10091 /* First, make sure the variable is declared at the
10092 module-level scope (J3/04-007, Section 15.3). */
10093 if (sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
&&
10094 sym
->attr
.in_common
== 0)
10096 gfc_error ("Variable '%s' at %L cannot be BIND(C) because it "
10097 "is neither a COMMON block nor declared at the "
10098 "module level scope", sym
->name
, &(sym
->declared_at
));
10101 else if (sym
->common_head
!= NULL
)
10103 t
= verify_com_block_vars_c_interop (sym
->common_head
);
10107 /* If type() declaration, we need to verify that the components
10108 of the given type are all C interoperable, etc. */
10109 if (sym
->ts
.type
== BT_DERIVED
&&
10110 sym
->ts
.u
.derived
->attr
.is_c_interop
!= 1)
10112 /* Make sure the user marked the derived type as BIND(C). If
10113 not, call the verify routine. This could print an error
10114 for the derived type more than once if multiple variables
10115 of that type are declared. */
10116 if (sym
->ts
.u
.derived
->attr
.is_bind_c
!= 1)
10117 verify_bind_c_derived_type (sym
->ts
.u
.derived
);
10121 /* Verify the variable itself as C interoperable if it
10122 is BIND(C). It is not possible for this to succeed if
10123 the verify_bind_c_derived_type failed, so don't have to handle
10124 any error returned by verify_bind_c_derived_type. */
10125 t
= verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
10126 sym
->common_block
);
10131 /* clear the is_bind_c flag to prevent reporting errors more than
10132 once if something failed. */
10133 sym
->attr
.is_bind_c
= 0;
10138 /* If a derived type symbol has reached this point, without its
10139 type being declared, we have an error. Notice that most
10140 conditions that produce undefined derived types have already
10141 been dealt with. However, the likes of:
10142 implicit type(t) (t) ..... call foo (t) will get us here if
10143 the type is not declared in the scope of the implicit
10144 statement. Change the type to BT_UNKNOWN, both because it is so
10145 and to prevent an ICE. */
10146 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->components
== NULL
10147 && !sym
->ts
.u
.derived
->attr
.zero_comp
)
10149 gfc_error ("The derived type '%s' at %L is of type '%s', "
10150 "which has not been defined", sym
->name
,
10151 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
10152 sym
->ts
.type
= BT_UNKNOWN
;
10156 /* Make sure that the derived type has been resolved and that the
10157 derived type is visible in the symbol's namespace, if it is a
10158 module function and is not PRIVATE. */
10159 if (sym
->ts
.type
== BT_DERIVED
10160 && sym
->ts
.u
.derived
->attr
.use_assoc
10161 && sym
->ns
->proc_name
10162 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
10166 if (resolve_fl_derived (sym
->ts
.u
.derived
) == FAILURE
)
10169 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 1, &ds
);
10170 if (!ds
&& sym
->attr
.function
10171 && gfc_check_access (sym
->attr
.access
, sym
->ns
->default_access
))
10173 symtree
= gfc_new_symtree (&sym
->ns
->sym_root
,
10174 sym
->ts
.u
.derived
->name
);
10175 symtree
->n
.sym
= sym
->ts
.u
.derived
;
10176 sym
->ts
.u
.derived
->refs
++;
10180 /* Unless the derived-type declaration is use associated, Fortran 95
10181 does not allow public entries of private derived types.
10182 See 4.4.1 (F95) and 4.5.1.1 (F2003); and related interpretation
10183 161 in 95-006r3. */
10184 if (sym
->ts
.type
== BT_DERIVED
10185 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
10186 && !sym
->ts
.u
.derived
->attr
.use_assoc
10187 && gfc_check_access (sym
->attr
.access
, sym
->ns
->default_access
)
10188 && !gfc_check_access (sym
->ts
.u
.derived
->attr
.access
,
10189 sym
->ts
.u
.derived
->ns
->default_access
)
10190 && gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: PUBLIC %s '%s' at %L "
10191 "of PRIVATE derived type '%s'",
10192 (sym
->attr
.flavor
== FL_PARAMETER
) ? "parameter"
10193 : "variable", sym
->name
, &sym
->declared_at
,
10194 sym
->ts
.u
.derived
->name
) == FAILURE
)
10197 /* An assumed-size array with INTENT(OUT) shall not be of a type for which
10198 default initialization is defined (5.1.2.4.4). */
10199 if (sym
->ts
.type
== BT_DERIVED
10201 && sym
->attr
.intent
== INTENT_OUT
10203 && sym
->as
->type
== AS_ASSUMED_SIZE
)
10205 for (c
= sym
->ts
.u
.derived
->components
; c
; c
= c
->next
)
10207 if (c
->initializer
)
10209 gfc_error ("The INTENT(OUT) dummy argument '%s' at %L is "
10210 "ASSUMED SIZE and so cannot have a default initializer",
10211 sym
->name
, &sym
->declared_at
);
10217 switch (sym
->attr
.flavor
)
10220 if (resolve_fl_variable (sym
, mp_flag
) == FAILURE
)
10225 if (resolve_fl_procedure (sym
, mp_flag
) == FAILURE
)
10230 if (resolve_fl_namelist (sym
) == FAILURE
)
10235 if (resolve_fl_parameter (sym
) == FAILURE
)
10243 /* Resolve array specifier. Check as well some constraints
10244 on COMMON blocks. */
10246 check_constant
= sym
->attr
.in_common
&& !sym
->attr
.pointer
;
10248 /* Set the formal_arg_flag so that check_conflict will not throw
10249 an error for host associated variables in the specification
10250 expression for an array_valued function. */
10251 if (sym
->attr
.function
&& sym
->as
)
10252 formal_arg_flag
= 1;
10254 gfc_resolve_array_spec (sym
->as
, check_constant
);
10256 formal_arg_flag
= 0;
10258 /* Resolve formal namespaces. */
10259 if (sym
->formal_ns
&& sym
->formal_ns
!= gfc_current_ns
10260 && !sym
->attr
.contained
)
10261 gfc_resolve (sym
->formal_ns
);
10263 /* Make sure the formal namespace is present. */
10264 if (sym
->formal
&& !sym
->formal_ns
)
10266 gfc_formal_arglist
*formal
= sym
->formal
;
10267 while (formal
&& !formal
->sym
)
10268 formal
= formal
->next
;
10272 sym
->formal_ns
= formal
->sym
->ns
;
10273 sym
->formal_ns
->refs
++;
10277 /* Check threadprivate restrictions. */
10278 if (sym
->attr
.threadprivate
&& !sym
->attr
.save
&& !sym
->ns
->save_all
10279 && (!sym
->attr
.in_common
10280 && sym
->module
== NULL
10281 && (sym
->ns
->proc_name
== NULL
10282 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
10283 gfc_error ("Threadprivate at %L isn't SAVEd", &sym
->declared_at
);
10285 /* If we have come this far we can apply default-initializers, as
10286 described in 14.7.5, to those variables that have not already
10287 been assigned one. */
10288 if (sym
->ts
.type
== BT_DERIVED
10289 && sym
->attr
.referenced
10290 && sym
->ns
== gfc_current_ns
10292 && !sym
->attr
.allocatable
10293 && !sym
->attr
.alloc_comp
)
10295 symbol_attribute
*a
= &sym
->attr
;
10297 if ((!a
->save
&& !a
->dummy
&& !a
->pointer
10298 && !a
->in_common
&& !a
->use_assoc
10299 && !(a
->function
&& sym
!= sym
->result
))
10300 || (a
->dummy
&& a
->intent
== INTENT_OUT
&& !a
->pointer
))
10301 apply_default_init (sym
);
10304 /* If this symbol has a type-spec, check it. */
10305 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
10306 || (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
))
10307 if (resolve_typespec_used (&sym
->ts
, &sym
->declared_at
, sym
->name
)
10313 /************* Resolve DATA statements *************/
10317 gfc_data_value
*vnode
;
10323 /* Advance the values structure to point to the next value in the data list. */
10326 next_data_value (void)
10328 while (mpz_cmp_ui (values
.left
, 0) == 0)
10330 if (!gfc_is_constant_expr (values
.vnode
->expr
))
10331 gfc_error ("non-constant DATA value at %L",
10332 &values
.vnode
->expr
->where
);
10334 if (values
.vnode
->next
== NULL
)
10337 values
.vnode
= values
.vnode
->next
;
10338 mpz_set (values
.left
, values
.vnode
->repeat
);
10346 check_data_variable (gfc_data_variable
*var
, locus
*where
)
10352 ar_type mark
= AR_UNKNOWN
;
10354 mpz_t section_index
[GFC_MAX_DIMENSIONS
];
10360 if (gfc_resolve_expr (var
->expr
) == FAILURE
)
10364 mpz_init_set_si (offset
, 0);
10367 if (e
->expr_type
!= EXPR_VARIABLE
)
10368 gfc_internal_error ("check_data_variable(): Bad expression");
10370 sym
= e
->symtree
->n
.sym
;
10372 if (sym
->ns
->is_block_data
&& !sym
->attr
.in_common
)
10374 gfc_error ("BLOCK DATA element '%s' at %L must be in COMMON",
10375 sym
->name
, &sym
->declared_at
);
10378 if (e
->ref
== NULL
&& sym
->as
)
10380 gfc_error ("DATA array '%s' at %L must be specified in a previous"
10381 " declaration", sym
->name
, where
);
10385 has_pointer
= sym
->attr
.pointer
;
10387 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
10389 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.pointer
)
10393 && ref
->type
== REF_ARRAY
10394 && ref
->u
.ar
.type
!= AR_FULL
)
10396 gfc_error ("DATA element '%s' at %L is a pointer and so must "
10397 "be a full array", sym
->name
, where
);
10402 if (e
->rank
== 0 || has_pointer
)
10404 mpz_init_set_ui (size
, 1);
10411 /* Find the array section reference. */
10412 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
10414 if (ref
->type
!= REF_ARRAY
)
10416 if (ref
->u
.ar
.type
== AR_ELEMENT
)
10422 /* Set marks according to the reference pattern. */
10423 switch (ref
->u
.ar
.type
)
10431 /* Get the start position of array section. */
10432 gfc_get_section_index (ar
, section_index
, &offset
);
10437 gcc_unreachable ();
10440 if (gfc_array_size (e
, &size
) == FAILURE
)
10442 gfc_error ("Nonconstant array section at %L in DATA statement",
10444 mpz_clear (offset
);
10451 while (mpz_cmp_ui (size
, 0) > 0)
10453 if (next_data_value () == FAILURE
)
10455 gfc_error ("DATA statement at %L has more variables than values",
10461 t
= gfc_check_assign (var
->expr
, values
.vnode
->expr
, 0);
10465 /* If we have more than one element left in the repeat count,
10466 and we have more than one element left in the target variable,
10467 then create a range assignment. */
10468 /* FIXME: Only done for full arrays for now, since array sections
10470 if (mark
== AR_FULL
&& ref
&& ref
->next
== NULL
10471 && mpz_cmp_ui (values
.left
, 1) > 0 && mpz_cmp_ui (size
, 1) > 0)
10475 if (mpz_cmp (size
, values
.left
) >= 0)
10477 mpz_init_set (range
, values
.left
);
10478 mpz_sub (size
, size
, values
.left
);
10479 mpz_set_ui (values
.left
, 0);
10483 mpz_init_set (range
, size
);
10484 mpz_sub (values
.left
, values
.left
, size
);
10485 mpz_set_ui (size
, 0);
10488 gfc_assign_data_value_range (var
->expr
, values
.vnode
->expr
,
10491 mpz_add (offset
, offset
, range
);
10495 /* Assign initial value to symbol. */
10498 mpz_sub_ui (values
.left
, values
.left
, 1);
10499 mpz_sub_ui (size
, size
, 1);
10501 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
, offset
);
10505 if (mark
== AR_FULL
)
10506 mpz_add_ui (offset
, offset
, 1);
10508 /* Modify the array section indexes and recalculate the offset
10509 for next element. */
10510 else if (mark
== AR_SECTION
)
10511 gfc_advance_section (section_index
, ar
, &offset
);
10515 if (mark
== AR_SECTION
)
10517 for (i
= 0; i
< ar
->dimen
; i
++)
10518 mpz_clear (section_index
[i
]);
10522 mpz_clear (offset
);
10528 static gfc_try
traverse_data_var (gfc_data_variable
*, locus
*);
10530 /* Iterate over a list of elements in a DATA statement. */
10533 traverse_data_list (gfc_data_variable
*var
, locus
*where
)
10536 iterator_stack frame
;
10537 gfc_expr
*e
, *start
, *end
, *step
;
10538 gfc_try retval
= SUCCESS
;
10540 mpz_init (frame
.value
);
10542 start
= gfc_copy_expr (var
->iter
.start
);
10543 end
= gfc_copy_expr (var
->iter
.end
);
10544 step
= gfc_copy_expr (var
->iter
.step
);
10546 if (gfc_simplify_expr (start
, 1) == FAILURE
10547 || start
->expr_type
!= EXPR_CONSTANT
)
10549 gfc_error ("iterator start at %L does not simplify", &start
->where
);
10553 if (gfc_simplify_expr (end
, 1) == FAILURE
10554 || end
->expr_type
!= EXPR_CONSTANT
)
10556 gfc_error ("iterator end at %L does not simplify", &end
->where
);
10560 if (gfc_simplify_expr (step
, 1) == FAILURE
10561 || step
->expr_type
!= EXPR_CONSTANT
)
10563 gfc_error ("iterator step at %L does not simplify", &step
->where
);
10568 mpz_init_set (trip
, end
->value
.integer
);
10569 mpz_sub (trip
, trip
, start
->value
.integer
);
10570 mpz_add (trip
, trip
, step
->value
.integer
);
10572 mpz_div (trip
, trip
, step
->value
.integer
);
10574 mpz_set (frame
.value
, start
->value
.integer
);
10576 frame
.prev
= iter_stack
;
10577 frame
.variable
= var
->iter
.var
->symtree
;
10578 iter_stack
= &frame
;
10580 while (mpz_cmp_ui (trip
, 0) > 0)
10582 if (traverse_data_var (var
->list
, where
) == FAILURE
)
10589 e
= gfc_copy_expr (var
->expr
);
10590 if (gfc_simplify_expr (e
, 1) == FAILURE
)
10598 mpz_add (frame
.value
, frame
.value
, step
->value
.integer
);
10600 mpz_sub_ui (trip
, trip
, 1);
10605 mpz_clear (frame
.value
);
10607 gfc_free_expr (start
);
10608 gfc_free_expr (end
);
10609 gfc_free_expr (step
);
10611 iter_stack
= frame
.prev
;
10616 /* Type resolve variables in the variable list of a DATA statement. */
10619 traverse_data_var (gfc_data_variable
*var
, locus
*where
)
10623 for (; var
; var
= var
->next
)
10625 if (var
->expr
== NULL
)
10626 t
= traverse_data_list (var
, where
);
10628 t
= check_data_variable (var
, where
);
10638 /* Resolve the expressions and iterators associated with a data statement.
10639 This is separate from the assignment checking because data lists should
10640 only be resolved once. */
10643 resolve_data_variables (gfc_data_variable
*d
)
10645 for (; d
; d
= d
->next
)
10647 if (d
->list
== NULL
)
10649 if (gfc_resolve_expr (d
->expr
) == FAILURE
)
10654 if (gfc_resolve_iterator (&d
->iter
, false) == FAILURE
)
10657 if (resolve_data_variables (d
->list
) == FAILURE
)
10666 /* Resolve a single DATA statement. We implement this by storing a pointer to
10667 the value list into static variables, and then recursively traversing the
10668 variables list, expanding iterators and such. */
10671 resolve_data (gfc_data
*d
)
10674 if (resolve_data_variables (d
->var
) == FAILURE
)
10677 values
.vnode
= d
->value
;
10678 if (d
->value
== NULL
)
10679 mpz_set_ui (values
.left
, 0);
10681 mpz_set (values
.left
, d
->value
->repeat
);
10683 if (traverse_data_var (d
->var
, &d
->where
) == FAILURE
)
10686 /* At this point, we better not have any values left. */
10688 if (next_data_value () == SUCCESS
)
10689 gfc_error ("DATA statement at %L has more values than variables",
10694 /* 12.6 Constraint: In a pure subprogram any variable which is in common or
10695 accessed by host or use association, is a dummy argument to a pure function,
10696 is a dummy argument with INTENT (IN) to a pure subroutine, or an object that
10697 is storage associated with any such variable, shall not be used in the
10698 following contexts: (clients of this function). */
10700 /* Determines if a variable is not 'pure', i.e., not assignable within a pure
10701 procedure. Returns zero if assignment is OK, nonzero if there is a
10704 gfc_impure_variable (gfc_symbol
*sym
)
10708 if (sym
->attr
.use_assoc
|| sym
->attr
.in_common
)
10711 if (sym
->ns
!= gfc_current_ns
)
10712 return !sym
->attr
.function
;
10714 proc
= sym
->ns
->proc_name
;
10715 if (sym
->attr
.dummy
&& gfc_pure (proc
)
10716 && ((proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_IN
)
10718 proc
->attr
.function
))
10721 /* TODO: Sort out what can be storage associated, if anything, and include
10722 it here. In principle equivalences should be scanned but it does not
10723 seem to be possible to storage associate an impure variable this way. */
10728 /* Test whether a symbol is pure or not. For a NULL pointer, checks the
10729 symbol of the current procedure. */
10732 gfc_pure (gfc_symbol
*sym
)
10734 symbol_attribute attr
;
10737 sym
= gfc_current_ns
->proc_name
;
10743 return attr
.flavor
== FL_PROCEDURE
&& (attr
.pure
|| attr
.elemental
);
10747 /* Test whether the current procedure is elemental or not. */
10750 gfc_elemental (gfc_symbol
*sym
)
10752 symbol_attribute attr
;
10755 sym
= gfc_current_ns
->proc_name
;
10760 return attr
.flavor
== FL_PROCEDURE
&& attr
.elemental
;
10764 /* Warn about unused labels. */
10767 warn_unused_fortran_label (gfc_st_label
*label
)
10772 warn_unused_fortran_label (label
->left
);
10774 if (label
->defined
== ST_LABEL_UNKNOWN
)
10777 switch (label
->referenced
)
10779 case ST_LABEL_UNKNOWN
:
10780 gfc_warning ("Label %d at %L defined but not used", label
->value
,
10784 case ST_LABEL_BAD_TARGET
:
10785 gfc_warning ("Label %d at %L defined but cannot be used",
10786 label
->value
, &label
->where
);
10793 warn_unused_fortran_label (label
->right
);
10797 /* Returns the sequence type of a symbol or sequence. */
10800 sequence_type (gfc_typespec ts
)
10809 if (ts
.u
.derived
->components
== NULL
)
10810 return SEQ_NONDEFAULT
;
10812 result
= sequence_type (ts
.u
.derived
->components
->ts
);
10813 for (c
= ts
.u
.derived
->components
->next
; c
; c
= c
->next
)
10814 if (sequence_type (c
->ts
) != result
)
10820 if (ts
.kind
!= gfc_default_character_kind
)
10821 return SEQ_NONDEFAULT
;
10823 return SEQ_CHARACTER
;
10826 if (ts
.kind
!= gfc_default_integer_kind
)
10827 return SEQ_NONDEFAULT
;
10829 return SEQ_NUMERIC
;
10832 if (!(ts
.kind
== gfc_default_real_kind
10833 || ts
.kind
== gfc_default_double_kind
))
10834 return SEQ_NONDEFAULT
;
10836 return SEQ_NUMERIC
;
10839 if (ts
.kind
!= gfc_default_complex_kind
)
10840 return SEQ_NONDEFAULT
;
10842 return SEQ_NUMERIC
;
10845 if (ts
.kind
!= gfc_default_logical_kind
)
10846 return SEQ_NONDEFAULT
;
10848 return SEQ_NUMERIC
;
10851 return SEQ_NONDEFAULT
;
10856 /* Resolve derived type EQUIVALENCE object. */
10859 resolve_equivalence_derived (gfc_symbol
*derived
, gfc_symbol
*sym
, gfc_expr
*e
)
10861 gfc_component
*c
= derived
->components
;
10866 /* Shall not be an object of nonsequence derived type. */
10867 if (!derived
->attr
.sequence
)
10869 gfc_error ("Derived type variable '%s' at %L must have SEQUENCE "
10870 "attribute to be an EQUIVALENCE object", sym
->name
,
10875 /* Shall not have allocatable components. */
10876 if (derived
->attr
.alloc_comp
)
10878 gfc_error ("Derived type variable '%s' at %L cannot have ALLOCATABLE "
10879 "components to be an EQUIVALENCE object",sym
->name
,
10884 if (sym
->attr
.in_common
&& has_default_initializer (sym
->ts
.u
.derived
))
10886 gfc_error ("Derived type variable '%s' at %L with default "
10887 "initialization cannot be in EQUIVALENCE with a variable "
10888 "in COMMON", sym
->name
, &e
->where
);
10892 for (; c
; c
= c
->next
)
10894 if (c
->ts
.type
== BT_DERIVED
10895 && (resolve_equivalence_derived (c
->ts
.u
.derived
, sym
, e
) == FAILURE
))
10898 /* Shall not be an object of sequence derived type containing a pointer
10899 in the structure. */
10900 if (c
->attr
.pointer
)
10902 gfc_error ("Derived type variable '%s' at %L with pointer "
10903 "component(s) cannot be an EQUIVALENCE object",
10904 sym
->name
, &e
->where
);
10912 /* Resolve equivalence object.
10913 An EQUIVALENCE object shall not be a dummy argument, a pointer, a target,
10914 an allocatable array, an object of nonsequence derived type, an object of
10915 sequence derived type containing a pointer at any level of component
10916 selection, an automatic object, a function name, an entry name, a result
10917 name, a named constant, a structure component, or a subobject of any of
10918 the preceding objects. A substring shall not have length zero. A
10919 derived type shall not have components with default initialization nor
10920 shall two objects of an equivalence group be initialized.
10921 Either all or none of the objects shall have an protected attribute.
10922 The simple constraints are done in symbol.c(check_conflict) and the rest
10923 are implemented here. */
10926 resolve_equivalence (gfc_equiv
*eq
)
10929 gfc_symbol
*first_sym
;
10932 locus
*last_where
= NULL
;
10933 seq_type eq_type
, last_eq_type
;
10934 gfc_typespec
*last_ts
;
10935 int object
, cnt_protected
;
10936 const char *value_name
;
10940 last_ts
= &eq
->expr
->symtree
->n
.sym
->ts
;
10942 first_sym
= eq
->expr
->symtree
->n
.sym
;
10946 for (object
= 1; eq
; eq
= eq
->eq
, object
++)
10950 e
->ts
= e
->symtree
->n
.sym
->ts
;
10951 /* match_varspec might not know yet if it is seeing
10952 array reference or substring reference, as it doesn't
10954 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
)
10956 gfc_ref
*ref
= e
->ref
;
10957 sym
= e
->symtree
->n
.sym
;
10959 if (sym
->attr
.dimension
)
10961 ref
->u
.ar
.as
= sym
->as
;
10965 /* For substrings, convert REF_ARRAY into REF_SUBSTRING. */
10966 if (e
->ts
.type
== BT_CHARACTER
10968 && ref
->type
== REF_ARRAY
10969 && ref
->u
.ar
.dimen
== 1
10970 && ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
10971 && ref
->u
.ar
.stride
[0] == NULL
)
10973 gfc_expr
*start
= ref
->u
.ar
.start
[0];
10974 gfc_expr
*end
= ref
->u
.ar
.end
[0];
10977 /* Optimize away the (:) reference. */
10978 if (start
== NULL
&& end
== NULL
)
10981 e
->ref
= ref
->next
;
10983 e
->ref
->next
= ref
->next
;
10988 ref
->type
= REF_SUBSTRING
;
10990 start
= gfc_int_expr (1);
10991 ref
->u
.ss
.start
= start
;
10992 if (end
== NULL
&& e
->ts
.u
.cl
)
10993 end
= gfc_copy_expr (e
->ts
.u
.cl
->length
);
10994 ref
->u
.ss
.end
= end
;
10995 ref
->u
.ss
.length
= e
->ts
.u
.cl
;
11002 /* Any further ref is an error. */
11005 gcc_assert (ref
->type
== REF_ARRAY
);
11006 gfc_error ("Syntax error in EQUIVALENCE statement at %L",
11012 if (gfc_resolve_expr (e
) == FAILURE
)
11015 sym
= e
->symtree
->n
.sym
;
11017 if (sym
->attr
.is_protected
)
11019 if (cnt_protected
> 0 && cnt_protected
!= object
)
11021 gfc_error ("Either all or none of the objects in the "
11022 "EQUIVALENCE set at %L shall have the "
11023 "PROTECTED attribute",
11028 /* Shall not equivalence common block variables in a PURE procedure. */
11029 if (sym
->ns
->proc_name
11030 && sym
->ns
->proc_name
->attr
.pure
11031 && sym
->attr
.in_common
)
11033 gfc_error ("Common block member '%s' at %L cannot be an EQUIVALENCE "
11034 "object in the pure procedure '%s'",
11035 sym
->name
, &e
->where
, sym
->ns
->proc_name
->name
);
11039 /* Shall not be a named constant. */
11040 if (e
->expr_type
== EXPR_CONSTANT
)
11042 gfc_error ("Named constant '%s' at %L cannot be an EQUIVALENCE "
11043 "object", sym
->name
, &e
->where
);
11047 if (e
->ts
.type
== BT_DERIVED
11048 && resolve_equivalence_derived (e
->ts
.u
.derived
, sym
, e
) == FAILURE
)
11051 /* Check that the types correspond correctly:
11053 A numeric sequence structure may be equivalenced to another sequence
11054 structure, an object of default integer type, default real type, double
11055 precision real type, default logical type such that components of the
11056 structure ultimately only become associated to objects of the same
11057 kind. A character sequence structure may be equivalenced to an object
11058 of default character kind or another character sequence structure.
11059 Other objects may be equivalenced only to objects of the same type and
11060 kind parameters. */
11062 /* Identical types are unconditionally OK. */
11063 if (object
== 1 || gfc_compare_types (last_ts
, &sym
->ts
))
11064 goto identical_types
;
11066 last_eq_type
= sequence_type (*last_ts
);
11067 eq_type
= sequence_type (sym
->ts
);
11069 /* Since the pair of objects is not of the same type, mixed or
11070 non-default sequences can be rejected. */
11072 msg
= "Sequence %s with mixed components in EQUIVALENCE "
11073 "statement at %L with different type objects";
11075 && last_eq_type
== SEQ_MIXED
11076 && gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
)
11078 || (eq_type
== SEQ_MIXED
11079 && gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
,
11080 &e
->where
) == FAILURE
))
11083 msg
= "Non-default type object or sequence %s in EQUIVALENCE "
11084 "statement at %L with objects of different type";
11086 && last_eq_type
== SEQ_NONDEFAULT
11087 && gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
,
11088 last_where
) == FAILURE
)
11089 || (eq_type
== SEQ_NONDEFAULT
11090 && gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
,
11091 &e
->where
) == FAILURE
))
11094 msg
="Non-CHARACTER object '%s' in default CHARACTER "
11095 "EQUIVALENCE statement at %L";
11096 if (last_eq_type
== SEQ_CHARACTER
11097 && eq_type
!= SEQ_CHARACTER
11098 && gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
,
11099 &e
->where
) == FAILURE
)
11102 msg
="Non-NUMERIC object '%s' in default NUMERIC "
11103 "EQUIVALENCE statement at %L";
11104 if (last_eq_type
== SEQ_NUMERIC
11105 && eq_type
!= SEQ_NUMERIC
11106 && gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
,
11107 &e
->where
) == FAILURE
)
11112 last_where
= &e
->where
;
11117 /* Shall not be an automatic array. */
11118 if (e
->ref
->type
== REF_ARRAY
11119 && gfc_resolve_array_spec (e
->ref
->u
.ar
.as
, 1) == FAILURE
)
11121 gfc_error ("Array '%s' at %L with non-constant bounds cannot be "
11122 "an EQUIVALENCE object", sym
->name
, &e
->where
);
11129 /* Shall not be a structure component. */
11130 if (r
->type
== REF_COMPONENT
)
11132 gfc_error ("Structure component '%s' at %L cannot be an "
11133 "EQUIVALENCE object",
11134 r
->u
.c
.component
->name
, &e
->where
);
11138 /* A substring shall not have length zero. */
11139 if (r
->type
== REF_SUBSTRING
)
11141 if (compare_bound (r
->u
.ss
.start
, r
->u
.ss
.end
) == CMP_GT
)
11143 gfc_error ("Substring at %L has length zero",
11144 &r
->u
.ss
.start
->where
);
11154 /* Resolve function and ENTRY types, issue diagnostics if needed. */
11157 resolve_fntype (gfc_namespace
*ns
)
11159 gfc_entry_list
*el
;
11162 if (ns
->proc_name
== NULL
|| !ns
->proc_name
->attr
.function
)
11165 /* If there are any entries, ns->proc_name is the entry master
11166 synthetic symbol and ns->entries->sym actual FUNCTION symbol. */
11168 sym
= ns
->entries
->sym
;
11170 sym
= ns
->proc_name
;
11171 if (sym
->result
== sym
11172 && sym
->ts
.type
== BT_UNKNOWN
11173 && gfc_set_default_type (sym
, 0, NULL
) == FAILURE
11174 && !sym
->attr
.untyped
)
11176 gfc_error ("Function '%s' at %L has no IMPLICIT type",
11177 sym
->name
, &sym
->declared_at
);
11178 sym
->attr
.untyped
= 1;
11181 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->ts
.u
.derived
->attr
.use_assoc
11182 && !sym
->attr
.contained
11183 && !gfc_check_access (sym
->ts
.u
.derived
->attr
.access
,
11184 sym
->ts
.u
.derived
->ns
->default_access
)
11185 && gfc_check_access (sym
->attr
.access
, sym
->ns
->default_access
))
11187 gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: PUBLIC function '%s' at "
11188 "%L of PRIVATE type '%s'", sym
->name
,
11189 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
11193 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
11195 if (el
->sym
->result
== el
->sym
11196 && el
->sym
->ts
.type
== BT_UNKNOWN
11197 && gfc_set_default_type (el
->sym
, 0, NULL
) == FAILURE
11198 && !el
->sym
->attr
.untyped
)
11200 gfc_error ("ENTRY '%s' at %L has no IMPLICIT type",
11201 el
->sym
->name
, &el
->sym
->declared_at
);
11202 el
->sym
->attr
.untyped
= 1;
11208 /* 12.3.2.1.1 Defined operators. */
11211 check_uop_procedure (gfc_symbol
*sym
, locus where
)
11213 gfc_formal_arglist
*formal
;
11215 if (!sym
->attr
.function
)
11217 gfc_error ("User operator procedure '%s' at %L must be a FUNCTION",
11218 sym
->name
, &where
);
11222 if (sym
->ts
.type
== BT_CHARACTER
11223 && !(sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
)
11224 && !(sym
->result
&& sym
->result
->ts
.u
.cl
11225 && sym
->result
->ts
.u
.cl
->length
))
11227 gfc_error ("User operator procedure '%s' at %L cannot be assumed "
11228 "character length", sym
->name
, &where
);
11232 formal
= sym
->formal
;
11233 if (!formal
|| !formal
->sym
)
11235 gfc_error ("User operator procedure '%s' at %L must have at least "
11236 "one argument", sym
->name
, &where
);
11240 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
11242 gfc_error ("First argument of operator interface at %L must be "
11243 "INTENT(IN)", &where
);
11247 if (formal
->sym
->attr
.optional
)
11249 gfc_error ("First argument of operator interface at %L cannot be "
11250 "optional", &where
);
11254 formal
= formal
->next
;
11255 if (!formal
|| !formal
->sym
)
11258 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
11260 gfc_error ("Second argument of operator interface at %L must be "
11261 "INTENT(IN)", &where
);
11265 if (formal
->sym
->attr
.optional
)
11267 gfc_error ("Second argument of operator interface at %L cannot be "
11268 "optional", &where
);
11274 gfc_error ("Operator interface at %L must have, at most, two "
11275 "arguments", &where
);
11283 gfc_resolve_uops (gfc_symtree
*symtree
)
11285 gfc_interface
*itr
;
11287 if (symtree
== NULL
)
11290 gfc_resolve_uops (symtree
->left
);
11291 gfc_resolve_uops (symtree
->right
);
11293 for (itr
= symtree
->n
.uop
->op
; itr
; itr
= itr
->next
)
11294 check_uop_procedure (itr
->sym
, itr
->sym
->declared_at
);
11298 /* Examine all of the expressions associated with a program unit,
11299 assign types to all intermediate expressions, make sure that all
11300 assignments are to compatible types and figure out which names
11301 refer to which functions or subroutines. It doesn't check code
11302 block, which is handled by resolve_code. */
11305 resolve_types (gfc_namespace
*ns
)
11311 gfc_namespace
* old_ns
= gfc_current_ns
;
11313 /* Check that all IMPLICIT types are ok. */
11314 if (!ns
->seen_implicit_none
)
11317 for (letter
= 0; letter
!= GFC_LETTERS
; ++letter
)
11318 if (ns
->set_flag
[letter
]
11319 && resolve_typespec_used (&ns
->default_type
[letter
],
11320 &ns
->implicit_loc
[letter
],
11325 gfc_current_ns
= ns
;
11327 resolve_entries (ns
);
11329 resolve_common_vars (ns
->blank_common
.head
, false);
11330 resolve_common_blocks (ns
->common_root
);
11332 resolve_contained_functions (ns
);
11334 gfc_traverse_ns (ns
, resolve_bind_c_derived_types
);
11336 for (cl
= ns
->cl_list
; cl
; cl
= cl
->next
)
11337 resolve_charlen (cl
);
11339 gfc_traverse_ns (ns
, resolve_symbol
);
11341 resolve_fntype (ns
);
11343 for (n
= ns
->contained
; n
; n
= n
->sibling
)
11345 if (gfc_pure (ns
->proc_name
) && !gfc_pure (n
->proc_name
))
11346 gfc_error ("Contained procedure '%s' at %L of a PURE procedure must "
11347 "also be PURE", n
->proc_name
->name
,
11348 &n
->proc_name
->declared_at
);
11354 gfc_check_interfaces (ns
);
11356 gfc_traverse_ns (ns
, resolve_values
);
11362 for (d
= ns
->data
; d
; d
= d
->next
)
11366 gfc_traverse_ns (ns
, gfc_formalize_init_value
);
11368 gfc_traverse_ns (ns
, gfc_verify_binding_labels
);
11370 if (ns
->common_root
!= NULL
)
11371 gfc_traverse_symtree (ns
->common_root
, resolve_bind_c_comms
);
11373 for (eq
= ns
->equiv
; eq
; eq
= eq
->next
)
11374 resolve_equivalence (eq
);
11376 /* Warn about unused labels. */
11377 if (warn_unused_label
)
11378 warn_unused_fortran_label (ns
->st_labels
);
11380 gfc_resolve_uops (ns
->uop_root
);
11382 gfc_current_ns
= old_ns
;
11386 /* Call resolve_code recursively. */
11389 resolve_codes (gfc_namespace
*ns
)
11392 bitmap_obstack old_obstack
;
11394 for (n
= ns
->contained
; n
; n
= n
->sibling
)
11397 gfc_current_ns
= ns
;
11399 /* Set to an out of range value. */
11400 current_entry_id
= -1;
11402 old_obstack
= labels_obstack
;
11403 bitmap_obstack_initialize (&labels_obstack
);
11405 resolve_code (ns
->code
, ns
);
11407 bitmap_obstack_release (&labels_obstack
);
11408 labels_obstack
= old_obstack
;
11412 /* This function is called after a complete program unit has been compiled.
11413 Its purpose is to examine all of the expressions associated with a program
11414 unit, assign types to all intermediate expressions, make sure that all
11415 assignments are to compatible types and figure out which names refer to
11416 which functions or subroutines. */
11419 gfc_resolve (gfc_namespace
*ns
)
11421 gfc_namespace
*old_ns
;
11422 code_stack
*old_cs_base
;
11428 old_ns
= gfc_current_ns
;
11429 old_cs_base
= cs_base
;
11431 resolve_types (ns
);
11432 resolve_codes (ns
);
11434 gfc_current_ns
= old_ns
;
11435 cs_base
= old_cs_base
;