1 /* Deal with interfaces.
2 Copyright (C) 2000-2016 Free Software Foundation, Inc.
3 Contributed by Andy Vaught
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
22 /* Deal with interfaces. An explicit interface is represented as a
23 singly linked list of formal argument structures attached to the
24 relevant symbols. For an implicit interface, the arguments don't
25 point to symbols. Explicit interfaces point to namespaces that
26 contain the symbols within that interface.
28 Implicit interfaces are linked together in a singly linked list
29 along the next_if member of symbol nodes. Since a particular
30 symbol can only have a single explicit interface, the symbol cannot
31 be part of multiple lists and a single next-member suffices.
33 This is not the case for general classes, though. An operator
34 definition is independent of just about all other uses and has it's
38 Nameless interfaces create symbols with explicit interfaces within
39 the current namespace. They are otherwise unlinked.
42 The generic name points to a linked list of symbols. Each symbol
43 has an explicit interface. Each explicit interface has its own
44 namespace containing the arguments. Module procedures are symbols in
45 which the interface is added later when the module procedure is parsed.
48 User-defined operators are stored in a their own set of symtrees
49 separate from regular symbols. The symtrees point to gfc_user_op
50 structures which in turn head up a list of relevant interfaces.
52 Extended intrinsics and assignment:
53 The head of these interface lists are stored in the containing namespace.
56 An implicit interface is represented as a singly linked list of
57 formal argument list structures that don't point to any symbol
58 nodes -- they just contain types.
61 When a subprogram is defined, the program unit's name points to an
62 interface as usual, but the link to the namespace is NULL and the
63 formal argument list points to symbols within the same namespace as
64 the program unit name. */
68 #include "coretypes.h"
74 /* The current_interface structure holds information about the
75 interface currently being parsed. This structure is saved and
76 restored during recursive interfaces. */
78 gfc_interface_info current_interface
;
81 /* Free a singly linked list of gfc_interface structures. */
84 gfc_free_interface (gfc_interface
*intr
)
88 for (; intr
; intr
= next
)
96 /* Change the operators unary plus and minus into binary plus and
97 minus respectively, leaving the rest unchanged. */
99 static gfc_intrinsic_op
100 fold_unary_intrinsic (gfc_intrinsic_op op
)
104 case INTRINSIC_UPLUS
:
107 case INTRINSIC_UMINUS
:
108 op
= INTRINSIC_MINUS
;
118 /* Return the operator depending on the DTIO moded string. Note that
119 these are not operators in the normal sense and so have been placed
120 beyond GFC_INTRINSIC_END in gfortran.h:enum gfc_intrinsic_op. */
122 static gfc_intrinsic_op
125 if (strncmp (mode
, "formatted", 9) == 0)
126 return INTRINSIC_FORMATTED
;
127 if (strncmp (mode
, "unformatted", 9) == 0)
128 return INTRINSIC_UNFORMATTED
;
129 return INTRINSIC_NONE
;
133 /* Match a generic specification. Depending on which type of
134 interface is found, the 'name' or 'op' pointers may be set.
135 This subroutine doesn't return MATCH_NO. */
138 gfc_match_generic_spec (interface_type
*type
,
140 gfc_intrinsic_op
*op
)
142 char buffer
[GFC_MAX_SYMBOL_LEN
+ 1];
146 if (gfc_match (" assignment ( = )") == MATCH_YES
)
148 *type
= INTERFACE_INTRINSIC_OP
;
149 *op
= INTRINSIC_ASSIGN
;
153 if (gfc_match (" operator ( %o )", &i
) == MATCH_YES
)
155 *type
= INTERFACE_INTRINSIC_OP
;
156 *op
= fold_unary_intrinsic (i
);
160 *op
= INTRINSIC_NONE
;
161 if (gfc_match (" operator ( ") == MATCH_YES
)
163 m
= gfc_match_defined_op_name (buffer
, 1);
169 m
= gfc_match_char (')');
175 strcpy (name
, buffer
);
176 *type
= INTERFACE_USER_OP
;
180 if (gfc_match (" read ( %n )", buffer
) == MATCH_YES
)
182 *op
= dtio_op (buffer
);
183 if (*op
== INTRINSIC_FORMATTED
)
185 strcpy (name
, gfc_code2string (dtio_procs
, DTIO_RF
));
186 *type
= INTERFACE_DTIO
;
188 if (*op
== INTRINSIC_UNFORMATTED
)
190 strcpy (name
, gfc_code2string (dtio_procs
, DTIO_RUF
));
191 *type
= INTERFACE_DTIO
;
193 if (*op
!= INTRINSIC_NONE
)
197 if (gfc_match (" write ( %n )", buffer
) == MATCH_YES
)
199 *op
= dtio_op (buffer
);
200 if (*op
== INTRINSIC_FORMATTED
)
202 strcpy (name
, gfc_code2string (dtio_procs
, DTIO_WF
));
203 *type
= INTERFACE_DTIO
;
205 if (*op
== INTRINSIC_UNFORMATTED
)
207 strcpy (name
, gfc_code2string (dtio_procs
, DTIO_WUF
));
208 *type
= INTERFACE_DTIO
;
210 if (*op
!= INTRINSIC_NONE
)
214 if (gfc_match_name (buffer
) == MATCH_YES
)
216 strcpy (name
, buffer
);
217 *type
= INTERFACE_GENERIC
;
221 *type
= INTERFACE_NAMELESS
;
225 gfc_error ("Syntax error in generic specification at %C");
230 /* Match one of the five F95 forms of an interface statement. The
231 matcher for the abstract interface follows. */
234 gfc_match_interface (void)
236 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
242 m
= gfc_match_space ();
244 if (gfc_match_generic_spec (&type
, name
, &op
) == MATCH_ERROR
)
247 /* If we're not looking at the end of the statement now, or if this
248 is not a nameless interface but we did not see a space, punt. */
249 if (gfc_match_eos () != MATCH_YES
250 || (type
!= INTERFACE_NAMELESS
&& m
!= MATCH_YES
))
252 gfc_error ("Syntax error: Trailing garbage in INTERFACE statement "
257 current_interface
.type
= type
;
262 case INTERFACE_GENERIC
:
263 if (gfc_get_symbol (name
, NULL
, &sym
))
266 if (!sym
->attr
.generic
267 && !gfc_add_generic (&sym
->attr
, sym
->name
, NULL
))
272 gfc_error ("Dummy procedure %qs at %C cannot have a "
273 "generic interface", sym
->name
);
277 current_interface
.sym
= gfc_new_block
= sym
;
280 case INTERFACE_USER_OP
:
281 current_interface
.uop
= gfc_get_uop (name
);
284 case INTERFACE_INTRINSIC_OP
:
285 current_interface
.op
= op
;
288 case INTERFACE_NAMELESS
:
289 case INTERFACE_ABSTRACT
:
298 /* Match a F2003 abstract interface. */
301 gfc_match_abstract_interface (void)
305 if (!gfc_notify_std (GFC_STD_F2003
, "ABSTRACT INTERFACE at %C"))
308 m
= gfc_match_eos ();
312 gfc_error ("Syntax error in ABSTRACT INTERFACE statement at %C");
316 current_interface
.type
= INTERFACE_ABSTRACT
;
322 /* Match the different sort of generic-specs that can be present after
323 the END INTERFACE itself. */
326 gfc_match_end_interface (void)
328 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
333 m
= gfc_match_space ();
335 if (gfc_match_generic_spec (&type
, name
, &op
) == MATCH_ERROR
)
338 /* If we're not looking at the end of the statement now, or if this
339 is not a nameless interface but we did not see a space, punt. */
340 if (gfc_match_eos () != MATCH_YES
341 || (type
!= INTERFACE_NAMELESS
&& m
!= MATCH_YES
))
343 gfc_error ("Syntax error: Trailing garbage in END INTERFACE "
350 switch (current_interface
.type
)
352 case INTERFACE_NAMELESS
:
353 case INTERFACE_ABSTRACT
:
354 if (type
!= INTERFACE_NAMELESS
)
356 gfc_error ("Expected a nameless interface at %C");
362 case INTERFACE_INTRINSIC_OP
:
363 if (type
!= current_interface
.type
|| op
!= current_interface
.op
)
366 if (current_interface
.op
== INTRINSIC_ASSIGN
)
369 gfc_error ("Expected %<END INTERFACE ASSIGNMENT (=)%> at %C");
374 s1
= gfc_op2string (current_interface
.op
);
375 s2
= gfc_op2string (op
);
377 /* The following if-statements are used to enforce C1202
379 if ((strcmp(s1
, "==") == 0 && strcmp (s2
, ".eq.") == 0)
380 || (strcmp(s1
, ".eq.") == 0 && strcmp (s2
, "==") == 0))
382 if ((strcmp(s1
, "/=") == 0 && strcmp (s2
, ".ne.") == 0)
383 || (strcmp(s1
, ".ne.") == 0 && strcmp (s2
, "/=") == 0))
385 if ((strcmp(s1
, "<=") == 0 && strcmp (s2
, ".le.") == 0)
386 || (strcmp(s1
, ".le.") == 0 && strcmp (s2
, "<=") == 0))
388 if ((strcmp(s1
, "<") == 0 && strcmp (s2
, ".lt.") == 0)
389 || (strcmp(s1
, ".lt.") == 0 && strcmp (s2
, "<") == 0))
391 if ((strcmp(s1
, ">=") == 0 && strcmp (s2
, ".ge.") == 0)
392 || (strcmp(s1
, ".ge.") == 0 && strcmp (s2
, ">=") == 0))
394 if ((strcmp(s1
, ">") == 0 && strcmp (s2
, ".gt.") == 0)
395 || (strcmp(s1
, ".gt.") == 0 && strcmp (s2
, ">") == 0))
399 if (strcmp(s2
, "none") == 0)
400 gfc_error ("Expecting %<END INTERFACE OPERATOR (%s)%> "
403 gfc_error ("Expecting %<END INTERFACE OPERATOR (%s)%> at %C, "
404 "but got %s", s1
, s2
);
411 case INTERFACE_USER_OP
:
412 /* Comparing the symbol node names is OK because only use-associated
413 symbols can be renamed. */
414 if (type
!= current_interface
.type
415 || strcmp (current_interface
.uop
->name
, name
) != 0)
417 gfc_error ("Expecting %<END INTERFACE OPERATOR (.%s.)%> at %C",
418 current_interface
.uop
->name
);
425 case INTERFACE_GENERIC
:
426 if (type
!= current_interface
.type
427 || strcmp (current_interface
.sym
->name
, name
) != 0)
429 gfc_error ("Expecting %<END INTERFACE %s%> at %C",
430 current_interface
.sym
->name
);
441 /* Return whether the component was defined anonymously. */
444 is_anonymous_component (gfc_component
*cmp
)
446 /* Only UNION and MAP components are anonymous. In the case of a MAP,
447 the derived type symbol is FL_STRUCT and the component name looks like mM*.
448 This is the only case in which the second character of a component name is
450 return cmp
->ts
.type
== BT_UNION
451 || (cmp
->ts
.type
== BT_DERIVED
452 && cmp
->ts
.u
.derived
->attr
.flavor
== FL_STRUCT
453 && cmp
->name
[0] && cmp
->name
[1] && ISUPPER (cmp
->name
[1]));
457 /* Return whether the derived type was defined anonymously. */
460 is_anonymous_dt (gfc_symbol
*derived
)
462 /* UNION and MAP types are always anonymous. Otherwise, only nested STRUCTURE
463 types can be anonymous. For anonymous MAP/STRUCTURE, we have FL_STRUCT
464 and the type name looks like XX*. This is the only case in which the
465 second character of a type name is uppercase. */
466 return derived
->attr
.flavor
== FL_UNION
467 || (derived
->attr
.flavor
== FL_STRUCT
468 && derived
->name
[0] && derived
->name
[1] && ISUPPER (derived
->name
[1]));
472 /* Compare components according to 4.4.2 of the Fortran standard. */
475 compare_components (gfc_component
*cmp1
, gfc_component
*cmp2
,
476 gfc_symbol
*derived1
, gfc_symbol
*derived2
)
478 /* Compare names, but not for anonymous components such as UNION or MAP. */
479 if (!is_anonymous_component (cmp1
) && !is_anonymous_component (cmp2
)
480 && strcmp (cmp1
->name
, cmp2
->name
) != 0)
483 if (cmp1
->attr
.access
!= cmp2
->attr
.access
)
486 if (cmp1
->attr
.pointer
!= cmp2
->attr
.pointer
)
489 if (cmp1
->attr
.dimension
!= cmp2
->attr
.dimension
)
492 if (cmp1
->attr
.allocatable
!= cmp2
->attr
.allocatable
)
495 if (cmp1
->attr
.dimension
&& gfc_compare_array_spec (cmp1
->as
, cmp2
->as
) == 0)
498 if (cmp1
->ts
.type
== BT_CHARACTER
&& cmp2
->ts
.type
== BT_CHARACTER
)
500 gfc_charlen
*l1
= cmp1
->ts
.u
.cl
;
501 gfc_charlen
*l2
= cmp2
->ts
.u
.cl
;
502 if (l1
&& l2
&& l1
->length
&& l2
->length
503 && l1
->length
->expr_type
== EXPR_CONSTANT
504 && l2
->length
->expr_type
== EXPR_CONSTANT
505 && gfc_dep_compare_expr (l1
->length
, l2
->length
) != 0)
509 /* Make sure that link lists do not put this function into an
510 endless recursive loop! */
511 if (!(cmp1
->ts
.type
== BT_DERIVED
&& derived1
== cmp1
->ts
.u
.derived
)
512 && !(cmp2
->ts
.type
== BT_DERIVED
&& derived2
== cmp2
->ts
.u
.derived
)
513 && gfc_compare_types (&cmp1
->ts
, &cmp2
->ts
) == 0)
516 else if ( (cmp1
->ts
.type
== BT_DERIVED
&& derived1
== cmp1
->ts
.u
.derived
)
517 && !(cmp2
->ts
.type
== BT_DERIVED
&& derived2
== cmp2
->ts
.u
.derived
))
520 else if (!(cmp1
->ts
.type
== BT_DERIVED
&& derived1
== cmp1
->ts
.u
.derived
)
521 && (cmp2
->ts
.type
== BT_DERIVED
&& derived2
== cmp2
->ts
.u
.derived
))
528 /* Compare two union types by comparing the components of their maps.
529 Because unions and maps are anonymous their types get special internal
530 names; therefore the usual derived type comparison will fail on them.
532 Returns nonzero if equal, as with gfc_compare_derived_types. Also as with
533 gfc_compare_derived_types, 'equal' is closer to meaning 'duplicate
534 definitions' than 'equivalent structure'. */
537 gfc_compare_union_types (gfc_symbol
*un1
, gfc_symbol
*un2
)
539 gfc_component
*map1
, *map2
, *cmp1
, *cmp2
;
540 gfc_symbol
*map1_t
, *map2_t
;
542 if (un1
->attr
.flavor
!= FL_UNION
|| un2
->attr
.flavor
!= FL_UNION
)
545 if (un1
->attr
.zero_comp
!= un2
->attr
.zero_comp
)
548 if (un1
->attr
.zero_comp
)
551 map1
= un1
->components
;
552 map2
= un2
->components
;
554 /* In terms of 'equality' here we are worried about types which are
555 declared the same in two places, not types that represent equivalent
556 structures. (This is common because of FORTRAN's weird scoping rules.)
557 Though two unions with their maps in different orders could be equivalent,
558 we will say they are not equal for the purposes of this test; therefore
559 we compare the maps sequentially. */
562 map1_t
= map1
->ts
.u
.derived
;
563 map2_t
= map2
->ts
.u
.derived
;
565 cmp1
= map1_t
->components
;
566 cmp2
= map2_t
->components
;
568 /* Protect against null components. */
569 if (map1_t
->attr
.zero_comp
!= map2_t
->attr
.zero_comp
)
572 if (map1_t
->attr
.zero_comp
)
577 /* No two fields will ever point to the same map type unless they are
578 the same component, because one map field is created with its type
579 declaration. Therefore don't worry about recursion here. */
580 /* TODO: worry about recursion into parent types of the unions? */
581 if (compare_components (cmp1
, cmp2
, map1_t
, map2_t
) == 0)
587 if (cmp1
== NULL
&& cmp2
== NULL
)
589 if (cmp1
== NULL
|| cmp2
== NULL
)
596 if (map1
== NULL
&& map2
== NULL
)
598 if (map1
== NULL
|| map2
== NULL
)
607 /* Compare two derived types using the criteria in 4.4.2 of the standard,
608 recursing through gfc_compare_types for the components. */
611 gfc_compare_derived_types (gfc_symbol
*derived1
, gfc_symbol
*derived2
)
613 gfc_component
*cmp1
, *cmp2
;
615 if (derived1
== derived2
)
618 if (!derived1
|| !derived2
)
619 gfc_internal_error ("gfc_compare_derived_types: invalid derived type");
621 /* Compare UNION types specially. */
622 if (derived1
->attr
.flavor
== FL_UNION
|| derived2
->attr
.flavor
== FL_UNION
)
623 return gfc_compare_union_types (derived1
, derived2
);
625 /* Special case for comparing derived types across namespaces. If the
626 true names and module names are the same and the module name is
627 nonnull, then they are equal. */
628 if (strcmp (derived1
->name
, derived2
->name
) == 0
629 && derived1
->module
!= NULL
&& derived2
->module
!= NULL
630 && strcmp (derived1
->module
, derived2
->module
) == 0)
633 /* Compare type via the rules of the standard. Both types must have
634 the SEQUENCE or BIND(C) attribute to be equal. STRUCTUREs are special
635 because they can be anonymous; therefore two structures with different
636 names may be equal. */
638 /* Compare names, but not for anonymous types such as UNION or MAP. */
639 if (!is_anonymous_dt (derived1
) && !is_anonymous_dt (derived2
)
640 && strcmp (derived1
->name
, derived2
->name
) != 0)
643 if (derived1
->component_access
== ACCESS_PRIVATE
644 || derived2
->component_access
== ACCESS_PRIVATE
)
647 if (!(derived1
->attr
.sequence
&& derived2
->attr
.sequence
)
648 && !(derived1
->attr
.is_bind_c
&& derived2
->attr
.is_bind_c
))
651 /* Protect against null components. */
652 if (derived1
->attr
.zero_comp
!= derived2
->attr
.zero_comp
)
655 if (derived1
->attr
.zero_comp
)
658 cmp1
= derived1
->components
;
659 cmp2
= derived2
->components
;
661 /* Since subtypes of SEQUENCE types must be SEQUENCE types as well, a
662 simple test can speed things up. Otherwise, lots of things have to
666 if (!compare_components (cmp1
, cmp2
, derived1
, derived2
))
672 if (cmp1
== NULL
&& cmp2
== NULL
)
674 if (cmp1
== NULL
|| cmp2
== NULL
)
682 /* Compare two typespecs, recursively if necessary. */
685 gfc_compare_types (gfc_typespec
*ts1
, gfc_typespec
*ts2
)
687 /* See if one of the typespecs is a BT_VOID, which is what is being used
688 to allow the funcs like c_f_pointer to accept any pointer type.
689 TODO: Possibly should narrow this to just the one typespec coming in
690 that is for the formal arg, but oh well. */
691 if (ts1
->type
== BT_VOID
|| ts2
->type
== BT_VOID
)
694 /* The _data component is not always present, therefore check for its
695 presence before assuming, that its derived->attr is available.
696 When the _data component is not present, then nevertheless the
697 unlimited_polymorphic flag may be set in the derived type's attr. */
698 if (ts1
->type
== BT_CLASS
&& ts1
->u
.derived
->components
699 && ((ts1
->u
.derived
->attr
.is_class
700 && ts1
->u
.derived
->components
->ts
.u
.derived
->attr
701 .unlimited_polymorphic
)
702 || ts1
->u
.derived
->attr
.unlimited_polymorphic
))
706 if (ts2
->type
== BT_CLASS
&& ts1
->type
== BT_DERIVED
707 && ts2
->u
.derived
->components
708 && ((ts2
->u
.derived
->attr
.is_class
709 && ts2
->u
.derived
->components
->ts
.u
.derived
->attr
710 .unlimited_polymorphic
)
711 || ts2
->u
.derived
->attr
.unlimited_polymorphic
)
712 && (ts1
->u
.derived
->attr
.sequence
|| ts1
->u
.derived
->attr
.is_bind_c
))
715 if (ts1
->type
!= ts2
->type
716 && ((ts1
->type
!= BT_DERIVED
&& ts1
->type
!= BT_CLASS
)
717 || (ts2
->type
!= BT_DERIVED
&& ts2
->type
!= BT_CLASS
)))
720 if (ts1
->type
== BT_UNION
)
721 return gfc_compare_union_types (ts1
->u
.derived
, ts2
->u
.derived
);
723 if (ts1
->type
!= BT_DERIVED
&& ts1
->type
!= BT_CLASS
)
724 return (ts1
->kind
== ts2
->kind
);
726 /* Compare derived types. */
727 return gfc_type_compatible (ts1
, ts2
);
732 compare_type (gfc_symbol
*s1
, gfc_symbol
*s2
)
734 if (s2
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
737 /* TYPE and CLASS of the same declared type are type compatible,
738 but have different characteristics. */
739 if ((s1
->ts
.type
== BT_CLASS
&& s2
->ts
.type
== BT_DERIVED
)
740 || (s1
->ts
.type
== BT_DERIVED
&& s2
->ts
.type
== BT_CLASS
))
743 return gfc_compare_types (&s1
->ts
, &s2
->ts
) || s2
->ts
.type
== BT_ASSUMED
;
748 compare_rank (gfc_symbol
*s1
, gfc_symbol
*s2
)
750 gfc_array_spec
*as1
, *as2
;
753 if (s2
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
756 as1
= (s1
->ts
.type
== BT_CLASS
) ? CLASS_DATA (s1
)->as
: s1
->as
;
757 as2
= (s2
->ts
.type
== BT_CLASS
) ? CLASS_DATA (s2
)->as
: s2
->as
;
759 r1
= as1
? as1
->rank
: 0;
760 r2
= as2
? as2
->rank
: 0;
762 if (r1
!= r2
&& (!as2
|| as2
->type
!= AS_ASSUMED_RANK
))
763 return 0; /* Ranks differ. */
769 /* Given two symbols that are formal arguments, compare their ranks
770 and types. Returns nonzero if they have the same rank and type,
774 compare_type_rank (gfc_symbol
*s1
, gfc_symbol
*s2
)
776 return compare_type (s1
, s2
) && compare_rank (s1
, s2
);
780 /* Given two symbols that are formal arguments, compare their types
781 and rank and their formal interfaces if they are both dummy
782 procedures. Returns nonzero if the same, zero if different. */
785 compare_type_rank_if (gfc_symbol
*s1
, gfc_symbol
*s2
)
787 if (s1
== NULL
|| s2
== NULL
)
788 return s1
== s2
? 1 : 0;
793 if (s1
->attr
.flavor
!= FL_PROCEDURE
&& s2
->attr
.flavor
!= FL_PROCEDURE
)
794 return compare_type_rank (s1
, s2
);
796 if (s1
->attr
.flavor
!= FL_PROCEDURE
|| s2
->attr
.flavor
!= FL_PROCEDURE
)
799 /* At this point, both symbols are procedures. It can happen that
800 external procedures are compared, where one is identified by usage
801 to be a function or subroutine but the other is not. Check TKR
802 nonetheless for these cases. */
803 if (s1
->attr
.function
== 0 && s1
->attr
.subroutine
== 0)
804 return s1
->attr
.external
== 1 ? compare_type_rank (s1
, s2
) : 0;
806 if (s2
->attr
.function
== 0 && s2
->attr
.subroutine
== 0)
807 return s2
->attr
.external
== 1 ? compare_type_rank (s1
, s2
) : 0;
809 /* Now the type of procedure has been identified. */
810 if (s1
->attr
.function
!= s2
->attr
.function
811 || s1
->attr
.subroutine
!= s2
->attr
.subroutine
)
814 if (s1
->attr
.function
&& compare_type_rank (s1
, s2
) == 0)
817 /* Originally, gfortran recursed here to check the interfaces of passed
818 procedures. This is explicitly not required by the standard. */
823 /* Given a formal argument list and a keyword name, search the list
824 for that keyword. Returns the correct symbol node if found, NULL
828 find_keyword_arg (const char *name
, gfc_formal_arglist
*f
)
830 for (; f
; f
= f
->next
)
831 if (strcmp (f
->sym
->name
, name
) == 0)
838 /******** Interface checking subroutines **********/
841 /* Given an operator interface and the operator, make sure that all
842 interfaces for that operator are legal. */
845 gfc_check_operator_interface (gfc_symbol
*sym
, gfc_intrinsic_op op
,
848 gfc_formal_arglist
*formal
;
851 int args
, r1
, r2
, k1
, k2
;
856 t1
= t2
= BT_UNKNOWN
;
857 i1
= i2
= INTENT_UNKNOWN
;
861 for (formal
= gfc_sym_get_dummy_args (sym
); formal
; formal
= formal
->next
)
863 gfc_symbol
*fsym
= formal
->sym
;
866 gfc_error ("Alternate return cannot appear in operator "
867 "interface at %L", &sym
->declared_at
);
873 i1
= fsym
->attr
.intent
;
874 r1
= (fsym
->as
!= NULL
) ? fsym
->as
->rank
: 0;
880 i2
= fsym
->attr
.intent
;
881 r2
= (fsym
->as
!= NULL
) ? fsym
->as
->rank
: 0;
887 /* Only +, - and .not. can be unary operators.
888 .not. cannot be a binary operator. */
889 if (args
== 0 || args
> 2 || (args
== 1 && op
!= INTRINSIC_PLUS
890 && op
!= INTRINSIC_MINUS
891 && op
!= INTRINSIC_NOT
)
892 || (args
== 2 && op
== INTRINSIC_NOT
))
894 if (op
== INTRINSIC_ASSIGN
)
895 gfc_error ("Assignment operator interface at %L must have "
896 "two arguments", &sym
->declared_at
);
898 gfc_error ("Operator interface at %L has the wrong number of arguments",
903 /* Check that intrinsics are mapped to functions, except
904 INTRINSIC_ASSIGN which should map to a subroutine. */
905 if (op
== INTRINSIC_ASSIGN
)
907 gfc_formal_arglist
*dummy_args
;
909 if (!sym
->attr
.subroutine
)
911 gfc_error ("Assignment operator interface at %L must be "
912 "a SUBROUTINE", &sym
->declared_at
);
916 /* Allowed are (per F2003, 12.3.2.1.2 Defined assignments):
917 - First argument an array with different rank than second,
918 - First argument is a scalar and second an array,
919 - Types and kinds do not conform, or
920 - First argument is of derived type. */
921 dummy_args
= gfc_sym_get_dummy_args (sym
);
922 if (dummy_args
->sym
->ts
.type
!= BT_DERIVED
923 && dummy_args
->sym
->ts
.type
!= BT_CLASS
924 && (r2
== 0 || r1
== r2
)
925 && (dummy_args
->sym
->ts
.type
== dummy_args
->next
->sym
->ts
.type
926 || (gfc_numeric_ts (&dummy_args
->sym
->ts
)
927 && gfc_numeric_ts (&dummy_args
->next
->sym
->ts
))))
929 gfc_error ("Assignment operator interface at %L must not redefine "
930 "an INTRINSIC type assignment", &sym
->declared_at
);
936 if (!sym
->attr
.function
)
938 gfc_error ("Intrinsic operator interface at %L must be a FUNCTION",
944 /* Check intents on operator interfaces. */
945 if (op
== INTRINSIC_ASSIGN
)
947 if (i1
!= INTENT_OUT
&& i1
!= INTENT_INOUT
)
949 gfc_error ("First argument of defined assignment at %L must be "
950 "INTENT(OUT) or INTENT(INOUT)", &sym
->declared_at
);
956 gfc_error ("Second argument of defined assignment at %L must be "
957 "INTENT(IN)", &sym
->declared_at
);
965 gfc_error ("First argument of operator interface at %L must be "
966 "INTENT(IN)", &sym
->declared_at
);
970 if (args
== 2 && i2
!= INTENT_IN
)
972 gfc_error ("Second argument of operator interface at %L must be "
973 "INTENT(IN)", &sym
->declared_at
);
978 /* From now on, all we have to do is check that the operator definition
979 doesn't conflict with an intrinsic operator. The rules for this
980 game are defined in 7.1.2 and 7.1.3 of both F95 and F2003 standards,
981 as well as 12.3.2.1.1 of Fortran 2003:
983 "If the operator is an intrinsic-operator (R310), the number of
984 function arguments shall be consistent with the intrinsic uses of
985 that operator, and the types, kind type parameters, or ranks of the
986 dummy arguments shall differ from those required for the intrinsic
987 operation (7.1.2)." */
989 #define IS_NUMERIC_TYPE(t) \
990 ((t) == BT_INTEGER || (t) == BT_REAL || (t) == BT_COMPLEX)
992 /* Unary ops are easy, do them first. */
993 if (op
== INTRINSIC_NOT
)
995 if (t1
== BT_LOGICAL
)
1001 if (args
== 1 && (op
== INTRINSIC_PLUS
|| op
== INTRINSIC_MINUS
))
1003 if (IS_NUMERIC_TYPE (t1
))
1009 /* Character intrinsic operators have same character kind, thus
1010 operator definitions with operands of different character kinds
1012 if (t1
== BT_CHARACTER
&& t2
== BT_CHARACTER
&& k1
!= k2
)
1015 /* Intrinsic operators always perform on arguments of same rank,
1016 so different ranks is also always safe. (rank == 0) is an exception
1017 to that, because all intrinsic operators are elemental. */
1018 if (r1
!= r2
&& r1
!= 0 && r2
!= 0)
1024 case INTRINSIC_EQ_OS
:
1026 case INTRINSIC_NE_OS
:
1027 if (t1
== BT_CHARACTER
&& t2
== BT_CHARACTER
)
1031 case INTRINSIC_PLUS
:
1032 case INTRINSIC_MINUS
:
1033 case INTRINSIC_TIMES
:
1034 case INTRINSIC_DIVIDE
:
1035 case INTRINSIC_POWER
:
1036 if (IS_NUMERIC_TYPE (t1
) && IS_NUMERIC_TYPE (t2
))
1041 case INTRINSIC_GT_OS
:
1043 case INTRINSIC_GE_OS
:
1045 case INTRINSIC_LT_OS
:
1047 case INTRINSIC_LE_OS
:
1048 if (t1
== BT_CHARACTER
&& t2
== BT_CHARACTER
)
1050 if ((t1
== BT_INTEGER
|| t1
== BT_REAL
)
1051 && (t2
== BT_INTEGER
|| t2
== BT_REAL
))
1055 case INTRINSIC_CONCAT
:
1056 if (t1
== BT_CHARACTER
&& t2
== BT_CHARACTER
)
1063 case INTRINSIC_NEQV
:
1064 if (t1
== BT_LOGICAL
&& t2
== BT_LOGICAL
)
1074 #undef IS_NUMERIC_TYPE
1077 gfc_error ("Operator interface at %L conflicts with intrinsic interface",
1083 /* Given a pair of formal argument lists, we see if the two lists can
1084 be distinguished by counting the number of nonoptional arguments of
1085 a given type/rank in f1 and seeing if there are less then that
1086 number of those arguments in f2 (including optional arguments).
1087 Since this test is asymmetric, it has to be called twice to make it
1088 symmetric. Returns nonzero if the argument lists are incompatible
1089 by this test. This subroutine implements rule 1 of section F03:16.2.3.
1090 'p1' and 'p2' are the PASS arguments of both procedures (if applicable). */
1093 count_types_test (gfc_formal_arglist
*f1
, gfc_formal_arglist
*f2
,
1094 const char *p1
, const char *p2
)
1096 int rc
, ac1
, ac2
, i
, j
, k
, n1
;
1097 gfc_formal_arglist
*f
;
1110 for (f
= f1
; f
; f
= f
->next
)
1113 /* Build an array of integers that gives the same integer to
1114 arguments of the same type/rank. */
1115 arg
= XCNEWVEC (arginfo
, n1
);
1118 for (i
= 0; i
< n1
; i
++, f
= f
->next
)
1121 arg
[i
].sym
= f
->sym
;
1126 for (i
= 0; i
< n1
; i
++)
1128 if (arg
[i
].flag
!= -1)
1131 if (arg
[i
].sym
&& (arg
[i
].sym
->attr
.optional
1132 || (p1
&& strcmp (arg
[i
].sym
->name
, p1
) == 0)))
1133 continue; /* Skip OPTIONAL and PASS arguments. */
1137 /* Find other non-optional, non-pass arguments of the same type/rank. */
1138 for (j
= i
+ 1; j
< n1
; j
++)
1139 if ((arg
[j
].sym
== NULL
1140 || !(arg
[j
].sym
->attr
.optional
1141 || (p1
&& strcmp (arg
[j
].sym
->name
, p1
) == 0)))
1142 && (compare_type_rank_if (arg
[i
].sym
, arg
[j
].sym
)
1143 || compare_type_rank_if (arg
[j
].sym
, arg
[i
].sym
)))
1149 /* Now loop over each distinct type found in f1. */
1153 for (i
= 0; i
< n1
; i
++)
1155 if (arg
[i
].flag
!= k
)
1159 for (j
= i
+ 1; j
< n1
; j
++)
1160 if (arg
[j
].flag
== k
)
1163 /* Count the number of non-pass arguments in f2 with that type,
1164 including those that are optional. */
1167 for (f
= f2
; f
; f
= f
->next
)
1168 if ((!p2
|| strcmp (f
->sym
->name
, p2
) != 0)
1169 && (compare_type_rank_if (arg
[i
].sym
, f
->sym
)
1170 || compare_type_rank_if (f
->sym
, arg
[i
].sym
)))
1188 /* Perform the correspondence test in rule (3) of F08:C1215.
1189 Returns zero if no argument is found that satisfies this rule,
1190 nonzero otherwise. 'p1' and 'p2' are the PASS arguments of both procedures
1193 This test is also not symmetric in f1 and f2 and must be called
1194 twice. This test finds problems caused by sorting the actual
1195 argument list with keywords. For example:
1199 INTEGER :: A ; REAL :: B
1203 INTEGER :: A ; REAL :: B
1207 At this point, 'CALL FOO(A=1, B=1.0)' is ambiguous. */
1210 generic_correspondence (gfc_formal_arglist
*f1
, gfc_formal_arglist
*f2
,
1211 const char *p1
, const char *p2
)
1213 gfc_formal_arglist
*f2_save
, *g
;
1220 if (f1
->sym
->attr
.optional
)
1223 if (p1
&& strcmp (f1
->sym
->name
, p1
) == 0)
1225 if (f2
&& p2
&& strcmp (f2
->sym
->name
, p2
) == 0)
1228 if (f2
!= NULL
&& (compare_type_rank (f1
->sym
, f2
->sym
)
1229 || compare_type_rank (f2
->sym
, f1
->sym
))
1230 && !((gfc_option
.allow_std
& GFC_STD_F2008
)
1231 && ((f1
->sym
->attr
.allocatable
&& f2
->sym
->attr
.pointer
)
1232 || (f2
->sym
->attr
.allocatable
&& f1
->sym
->attr
.pointer
))))
1235 /* Now search for a disambiguating keyword argument starting at
1236 the current non-match. */
1237 for (g
= f1
; g
; g
= g
->next
)
1239 if (g
->sym
->attr
.optional
|| (p1
&& strcmp (g
->sym
->name
, p1
) == 0))
1242 sym
= find_keyword_arg (g
->sym
->name
, f2_save
);
1243 if (sym
== NULL
|| !compare_type_rank (g
->sym
, sym
)
1244 || ((gfc_option
.allow_std
& GFC_STD_F2008
)
1245 && ((sym
->attr
.allocatable
&& g
->sym
->attr
.pointer
)
1246 || (sym
->attr
.pointer
&& g
->sym
->attr
.allocatable
))))
1262 symbol_rank (gfc_symbol
*sym
)
1265 as
= (sym
->ts
.type
== BT_CLASS
) ? CLASS_DATA (sym
)->as
: sym
->as
;
1266 return as
? as
->rank
: 0;
1270 /* Check if the characteristics of two dummy arguments match,
1274 gfc_check_dummy_characteristics (gfc_symbol
*s1
, gfc_symbol
*s2
,
1275 bool type_must_agree
, char *errmsg
,
1278 if (s1
== NULL
|| s2
== NULL
)
1279 return s1
== s2
? true : false;
1281 /* Check type and rank. */
1282 if (type_must_agree
)
1284 if (!compare_type (s1
, s2
) || !compare_type (s2
, s1
))
1286 snprintf (errmsg
, err_len
, "Type mismatch in argument '%s' (%s/%s)",
1287 s1
->name
, gfc_typename (&s1
->ts
), gfc_typename (&s2
->ts
));
1290 if (!compare_rank (s1
, s2
))
1292 snprintf (errmsg
, err_len
, "Rank mismatch in argument '%s' (%i/%i)",
1293 s1
->name
, symbol_rank (s1
), symbol_rank (s2
));
1299 if (s1
->attr
.intent
!= s2
->attr
.intent
)
1301 snprintf (errmsg
, err_len
, "INTENT mismatch in argument '%s'",
1306 /* Check OPTIONAL attribute. */
1307 if (s1
->attr
.optional
!= s2
->attr
.optional
)
1309 snprintf (errmsg
, err_len
, "OPTIONAL mismatch in argument '%s'",
1314 /* Check ALLOCATABLE attribute. */
1315 if (s1
->attr
.allocatable
!= s2
->attr
.allocatable
)
1317 snprintf (errmsg
, err_len
, "ALLOCATABLE mismatch in argument '%s'",
1322 /* Check POINTER attribute. */
1323 if (s1
->attr
.pointer
!= s2
->attr
.pointer
)
1325 snprintf (errmsg
, err_len
, "POINTER mismatch in argument '%s'",
1330 /* Check TARGET attribute. */
1331 if (s1
->attr
.target
!= s2
->attr
.target
)
1333 snprintf (errmsg
, err_len
, "TARGET mismatch in argument '%s'",
1338 /* Check ASYNCHRONOUS attribute. */
1339 if (s1
->attr
.asynchronous
!= s2
->attr
.asynchronous
)
1341 snprintf (errmsg
, err_len
, "ASYNCHRONOUS mismatch in argument '%s'",
1346 /* Check CONTIGUOUS attribute. */
1347 if (s1
->attr
.contiguous
!= s2
->attr
.contiguous
)
1349 snprintf (errmsg
, err_len
, "CONTIGUOUS mismatch in argument '%s'",
1354 /* Check VALUE attribute. */
1355 if (s1
->attr
.value
!= s2
->attr
.value
)
1357 snprintf (errmsg
, err_len
, "VALUE mismatch in argument '%s'",
1362 /* Check VOLATILE attribute. */
1363 if (s1
->attr
.volatile_
!= s2
->attr
.volatile_
)
1365 snprintf (errmsg
, err_len
, "VOLATILE mismatch in argument '%s'",
1370 /* Check interface of dummy procedures. */
1371 if (s1
->attr
.flavor
== FL_PROCEDURE
)
1374 if (!gfc_compare_interfaces (s1
, s2
, s2
->name
, 0, 1, err
, sizeof(err
),
1377 snprintf (errmsg
, err_len
, "Interface mismatch in dummy procedure "
1378 "'%s': %s", s1
->name
, err
);
1383 /* Check string length. */
1384 if (s1
->ts
.type
== BT_CHARACTER
1385 && s1
->ts
.u
.cl
&& s1
->ts
.u
.cl
->length
1386 && s2
->ts
.u
.cl
&& s2
->ts
.u
.cl
->length
)
1388 int compval
= gfc_dep_compare_expr (s1
->ts
.u
.cl
->length
,
1389 s2
->ts
.u
.cl
->length
);
1395 snprintf (errmsg
, err_len
, "Character length mismatch "
1396 "in argument '%s'", s1
->name
);
1400 /* FIXME: Implement a warning for this case.
1401 gfc_warning (0, "Possible character length mismatch in argument %qs",
1409 gfc_internal_error ("check_dummy_characteristics: Unexpected result "
1410 "%i of gfc_dep_compare_expr", compval
);
1415 /* Check array shape. */
1416 if (s1
->as
&& s2
->as
)
1419 gfc_expr
*shape1
, *shape2
;
1421 if (s1
->as
->type
!= s2
->as
->type
)
1423 snprintf (errmsg
, err_len
, "Shape mismatch in argument '%s'",
1428 if (s1
->as
->corank
!= s2
->as
->corank
)
1430 snprintf (errmsg
, err_len
, "Corank mismatch in argument '%s' (%i/%i)",
1431 s1
->name
, s1
->as
->corank
, s2
->as
->corank
);
1435 if (s1
->as
->type
== AS_EXPLICIT
)
1436 for (i
= 0; i
< s1
->as
->rank
+ MAX (0, s1
->as
->corank
-1); i
++)
1438 shape1
= gfc_subtract (gfc_copy_expr (s1
->as
->upper
[i
]),
1439 gfc_copy_expr (s1
->as
->lower
[i
]));
1440 shape2
= gfc_subtract (gfc_copy_expr (s2
->as
->upper
[i
]),
1441 gfc_copy_expr (s2
->as
->lower
[i
]));
1442 compval
= gfc_dep_compare_expr (shape1
, shape2
);
1443 gfc_free_expr (shape1
);
1444 gfc_free_expr (shape2
);
1450 if (i
< s1
->as
->rank
)
1451 snprintf (errmsg
, err_len
, "Shape mismatch in dimension %i of"
1452 " argument '%s'", i
+ 1, s1
->name
);
1454 snprintf (errmsg
, err_len
, "Shape mismatch in codimension %i "
1455 "of argument '%s'", i
- s1
->as
->rank
+ 1, s1
->name
);
1459 /* FIXME: Implement a warning for this case.
1460 gfc_warning (0, "Possible shape mismatch in argument %qs",
1468 gfc_internal_error ("check_dummy_characteristics: Unexpected "
1469 "result %i of gfc_dep_compare_expr",
1480 /* Check if the characteristics of two function results match,
1484 gfc_check_result_characteristics (gfc_symbol
*s1
, gfc_symbol
*s2
,
1485 char *errmsg
, int err_len
)
1487 gfc_symbol
*r1
, *r2
;
1489 if (s1
->ts
.interface
&& s1
->ts
.interface
->result
)
1490 r1
= s1
->ts
.interface
->result
;
1492 r1
= s1
->result
? s1
->result
: s1
;
1494 if (s2
->ts
.interface
&& s2
->ts
.interface
->result
)
1495 r2
= s2
->ts
.interface
->result
;
1497 r2
= s2
->result
? s2
->result
: s2
;
1499 if (r1
->ts
.type
== BT_UNKNOWN
)
1502 /* Check type and rank. */
1503 if (!compare_type (r1
, r2
))
1505 snprintf (errmsg
, err_len
, "Type mismatch in function result (%s/%s)",
1506 gfc_typename (&r1
->ts
), gfc_typename (&r2
->ts
));
1509 if (!compare_rank (r1
, r2
))
1511 snprintf (errmsg
, err_len
, "Rank mismatch in function result (%i/%i)",
1512 symbol_rank (r1
), symbol_rank (r2
));
1516 /* Check ALLOCATABLE attribute. */
1517 if (r1
->attr
.allocatable
!= r2
->attr
.allocatable
)
1519 snprintf (errmsg
, err_len
, "ALLOCATABLE attribute mismatch in "
1524 /* Check POINTER attribute. */
1525 if (r1
->attr
.pointer
!= r2
->attr
.pointer
)
1527 snprintf (errmsg
, err_len
, "POINTER attribute mismatch in "
1532 /* Check CONTIGUOUS attribute. */
1533 if (r1
->attr
.contiguous
!= r2
->attr
.contiguous
)
1535 snprintf (errmsg
, err_len
, "CONTIGUOUS attribute mismatch in "
1540 /* Check PROCEDURE POINTER attribute. */
1541 if (r1
!= s1
&& r1
->attr
.proc_pointer
!= r2
->attr
.proc_pointer
)
1543 snprintf (errmsg
, err_len
, "PROCEDURE POINTER mismatch in "
1548 /* Check string length. */
1549 if (r1
->ts
.type
== BT_CHARACTER
&& r1
->ts
.u
.cl
&& r2
->ts
.u
.cl
)
1551 if (r1
->ts
.deferred
!= r2
->ts
.deferred
)
1553 snprintf (errmsg
, err_len
, "Character length mismatch "
1554 "in function result");
1558 if (r1
->ts
.u
.cl
->length
&& r2
->ts
.u
.cl
->length
)
1560 int compval
= gfc_dep_compare_expr (r1
->ts
.u
.cl
->length
,
1561 r2
->ts
.u
.cl
->length
);
1567 snprintf (errmsg
, err_len
, "Character length mismatch "
1568 "in function result");
1572 /* FIXME: Implement a warning for this case.
1573 snprintf (errmsg, err_len, "Possible character length mismatch "
1574 "in function result");*/
1581 gfc_internal_error ("check_result_characteristics (1): Unexpected "
1582 "result %i of gfc_dep_compare_expr", compval
);
1588 /* Check array shape. */
1589 if (!r1
->attr
.allocatable
&& !r1
->attr
.pointer
&& r1
->as
&& r2
->as
)
1592 gfc_expr
*shape1
, *shape2
;
1594 if (r1
->as
->type
!= r2
->as
->type
)
1596 snprintf (errmsg
, err_len
, "Shape mismatch in function result");
1600 if (r1
->as
->type
== AS_EXPLICIT
)
1601 for (i
= 0; i
< r1
->as
->rank
+ r1
->as
->corank
; i
++)
1603 shape1
= gfc_subtract (gfc_copy_expr (r1
->as
->upper
[i
]),
1604 gfc_copy_expr (r1
->as
->lower
[i
]));
1605 shape2
= gfc_subtract (gfc_copy_expr (r2
->as
->upper
[i
]),
1606 gfc_copy_expr (r2
->as
->lower
[i
]));
1607 compval
= gfc_dep_compare_expr (shape1
, shape2
);
1608 gfc_free_expr (shape1
);
1609 gfc_free_expr (shape2
);
1615 snprintf (errmsg
, err_len
, "Shape mismatch in dimension %i of "
1616 "function result", i
+ 1);
1620 /* FIXME: Implement a warning for this case.
1621 gfc_warning (0, "Possible shape mismatch in return value");*/
1628 gfc_internal_error ("check_result_characteristics (2): "
1629 "Unexpected result %i of "
1630 "gfc_dep_compare_expr", compval
);
1640 /* 'Compare' two formal interfaces associated with a pair of symbols.
1641 We return nonzero if there exists an actual argument list that
1642 would be ambiguous between the two interfaces, zero otherwise.
1643 'strict_flag' specifies whether all the characteristics are
1644 required to match, which is not the case for ambiguity checks.
1645 'p1' and 'p2' are the PASS arguments of both procedures (if applicable). */
1648 gfc_compare_interfaces (gfc_symbol
*s1
, gfc_symbol
*s2
, const char *name2
,
1649 int generic_flag
, int strict_flag
,
1650 char *errmsg
, int err_len
,
1651 const char *p1
, const char *p2
)
1653 gfc_formal_arglist
*f1
, *f2
;
1655 gcc_assert (name2
!= NULL
);
1657 if (s1
->attr
.function
&& (s2
->attr
.subroutine
1658 || (!s2
->attr
.function
&& s2
->ts
.type
== BT_UNKNOWN
1659 && gfc_get_default_type (name2
, s2
->ns
)->type
== BT_UNKNOWN
)))
1662 snprintf (errmsg
, err_len
, "'%s' is not a function", name2
);
1666 if (s1
->attr
.subroutine
&& s2
->attr
.function
)
1669 snprintf (errmsg
, err_len
, "'%s' is not a subroutine", name2
);
1673 /* Do strict checks on all characteristics
1674 (for dummy procedures and procedure pointer assignments). */
1675 if (!generic_flag
&& strict_flag
)
1677 if (s1
->attr
.function
&& s2
->attr
.function
)
1679 /* If both are functions, check result characteristics. */
1680 if (!gfc_check_result_characteristics (s1
, s2
, errmsg
, err_len
)
1681 || !gfc_check_result_characteristics (s2
, s1
, errmsg
, err_len
))
1685 if (s1
->attr
.pure
&& !s2
->attr
.pure
)
1687 snprintf (errmsg
, err_len
, "Mismatch in PURE attribute");
1690 if (s1
->attr
.elemental
&& !s2
->attr
.elemental
)
1692 snprintf (errmsg
, err_len
, "Mismatch in ELEMENTAL attribute");
1697 if (s1
->attr
.if_source
== IFSRC_UNKNOWN
1698 || s2
->attr
.if_source
== IFSRC_UNKNOWN
)
1701 f1
= gfc_sym_get_dummy_args (s1
);
1702 f2
= gfc_sym_get_dummy_args (s2
);
1704 /* Special case: No arguments. */
1705 if (f1
== NULL
&& f2
== NULL
)
1710 if (count_types_test (f1
, f2
, p1
, p2
)
1711 || count_types_test (f2
, f1
, p2
, p1
))
1714 /* Special case: alternate returns. If both f1->sym and f2->sym are
1715 NULL, then the leading formal arguments are alternate returns.
1716 The previous conditional should catch argument lists with
1717 different number of argument. */
1718 if (f1
&& f1
->sym
== NULL
&& f2
&& f2
->sym
== NULL
)
1721 if (generic_correspondence (f1
, f2
, p1
, p2
)
1722 || generic_correspondence (f2
, f1
, p2
, p1
))
1726 /* Perform the abbreviated correspondence test for operators (the
1727 arguments cannot be optional and are always ordered correctly).
1728 This is also done when comparing interfaces for dummy procedures and in
1729 procedure pointer assignments. */
1731 for (; f1
|| f2
; f1
= f1
->next
, f2
= f2
->next
)
1733 /* Check existence. */
1734 if (f1
== NULL
|| f2
== NULL
)
1737 snprintf (errmsg
, err_len
, "'%s' has the wrong number of "
1738 "arguments", name2
);
1744 /* Check all characteristics. */
1745 if (!gfc_check_dummy_characteristics (f1
->sym
, f2
->sym
, true,
1751 /* Only check type and rank. */
1752 if (!compare_type (f2
->sym
, f1
->sym
))
1755 snprintf (errmsg
, err_len
, "Type mismatch in argument '%s' "
1756 "(%s/%s)", f1
->sym
->name
,
1757 gfc_typename (&f1
->sym
->ts
),
1758 gfc_typename (&f2
->sym
->ts
));
1761 if (!compare_rank (f2
->sym
, f1
->sym
))
1764 snprintf (errmsg
, err_len
, "Rank mismatch in argument '%s' "
1765 "(%i/%i)", f1
->sym
->name
, symbol_rank (f1
->sym
),
1766 symbol_rank (f2
->sym
));
1776 /* Given a pointer to an interface pointer, remove duplicate
1777 interfaces and make sure that all symbols are either functions
1778 or subroutines, and all of the same kind. Returns nonzero if
1779 something goes wrong. */
1782 check_interface0 (gfc_interface
*p
, const char *interface_name
)
1784 gfc_interface
*psave
, *q
, *qlast
;
1787 for (; p
; p
= p
->next
)
1789 /* Make sure all symbols in the interface have been defined as
1790 functions or subroutines. */
1791 if (((!p
->sym
->attr
.function
&& !p
->sym
->attr
.subroutine
)
1792 || !p
->sym
->attr
.if_source
)
1793 && !gfc_fl_struct (p
->sym
->attr
.flavor
))
1795 if (p
->sym
->attr
.external
)
1796 gfc_error ("Procedure %qs in %s at %L has no explicit interface",
1797 p
->sym
->name
, interface_name
, &p
->sym
->declared_at
);
1799 gfc_error ("Procedure %qs in %s at %L is neither function nor "
1800 "subroutine", p
->sym
->name
, interface_name
,
1801 &p
->sym
->declared_at
);
1805 /* Verify that procedures are either all SUBROUTINEs or all FUNCTIONs. */
1806 if ((psave
->sym
->attr
.function
&& !p
->sym
->attr
.function
1807 && !gfc_fl_struct (p
->sym
->attr
.flavor
))
1808 || (psave
->sym
->attr
.subroutine
&& !p
->sym
->attr
.subroutine
))
1810 if (!gfc_fl_struct (p
->sym
->attr
.flavor
))
1811 gfc_error ("In %s at %L procedures must be either all SUBROUTINEs"
1812 " or all FUNCTIONs", interface_name
,
1813 &p
->sym
->declared_at
);
1814 else if (p
->sym
->attr
.flavor
== FL_DERIVED
)
1815 gfc_error ("In %s at %L procedures must be all FUNCTIONs as the "
1816 "generic name is also the name of a derived type",
1817 interface_name
, &p
->sym
->declared_at
);
1821 /* F2003, C1207. F2008, C1207. */
1822 if (p
->sym
->attr
.proc
== PROC_INTERNAL
1823 && !gfc_notify_std (GFC_STD_F2008
, "Internal procedure "
1824 "%qs in %s at %L", p
->sym
->name
,
1825 interface_name
, &p
->sym
->declared_at
))
1830 /* Remove duplicate interfaces in this interface list. */
1831 for (; p
; p
= p
->next
)
1835 for (q
= p
->next
; q
;)
1837 if (p
->sym
!= q
->sym
)
1844 /* Duplicate interface. */
1845 qlast
->next
= q
->next
;
1856 /* Check lists of interfaces to make sure that no two interfaces are
1857 ambiguous. Duplicate interfaces (from the same symbol) are OK here. */
1860 check_interface1 (gfc_interface
*p
, gfc_interface
*q0
,
1861 int generic_flag
, const char *interface_name
,
1865 for (; p
; p
= p
->next
)
1866 for (q
= q0
; q
; q
= q
->next
)
1868 if (p
->sym
== q
->sym
)
1869 continue; /* Duplicates OK here. */
1871 if (p
->sym
->name
== q
->sym
->name
&& p
->sym
->module
== q
->sym
->module
)
1874 if (!gfc_fl_struct (p
->sym
->attr
.flavor
)
1875 && !gfc_fl_struct (q
->sym
->attr
.flavor
)
1876 && gfc_compare_interfaces (p
->sym
, q
->sym
, q
->sym
->name
,
1877 generic_flag
, 0, NULL
, 0, NULL
, NULL
))
1880 gfc_error ("Ambiguous interfaces in %s for %qs at %L "
1881 "and %qs at %L", interface_name
,
1882 q
->sym
->name
, &q
->sym
->declared_at
,
1883 p
->sym
->name
, &p
->sym
->declared_at
);
1884 else if (!p
->sym
->attr
.use_assoc
&& q
->sym
->attr
.use_assoc
)
1885 gfc_warning (0, "Ambiguous interfaces in %s for %qs at %L "
1886 "and %qs at %L", interface_name
,
1887 q
->sym
->name
, &q
->sym
->declared_at
,
1888 p
->sym
->name
, &p
->sym
->declared_at
);
1890 gfc_warning (0, "Although not referenced, %qs has ambiguous "
1891 "interfaces at %L", interface_name
, &p
->where
);
1899 /* Check the generic and operator interfaces of symbols to make sure
1900 that none of the interfaces conflict. The check has to be done
1901 after all of the symbols are actually loaded. */
1904 check_sym_interfaces (gfc_symbol
*sym
)
1906 char interface_name
[100];
1909 if (sym
->ns
!= gfc_current_ns
)
1912 if (sym
->generic
!= NULL
)
1914 sprintf (interface_name
, "generic interface '%s'", sym
->name
);
1915 if (check_interface0 (sym
->generic
, interface_name
))
1918 for (p
= sym
->generic
; p
; p
= p
->next
)
1920 if (p
->sym
->attr
.mod_proc
1921 && !p
->sym
->attr
.module_procedure
1922 && (p
->sym
->attr
.if_source
!= IFSRC_DECL
1923 || p
->sym
->attr
.procedure
))
1925 gfc_error ("%qs at %L is not a module procedure",
1926 p
->sym
->name
, &p
->where
);
1931 /* Originally, this test was applied to host interfaces too;
1932 this is incorrect since host associated symbols, from any
1933 source, cannot be ambiguous with local symbols. */
1934 check_interface1 (sym
->generic
, sym
->generic
, 1, interface_name
,
1935 sym
->attr
.referenced
|| !sym
->attr
.use_assoc
);
1941 check_uop_interfaces (gfc_user_op
*uop
)
1943 char interface_name
[100];
1947 sprintf (interface_name
, "operator interface '%s'", uop
->name
);
1948 if (check_interface0 (uop
->op
, interface_name
))
1951 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
1953 uop2
= gfc_find_uop (uop
->name
, ns
);
1957 check_interface1 (uop
->op
, uop2
->op
, 0,
1958 interface_name
, true);
1962 /* Given an intrinsic op, return an equivalent op if one exists,
1963 or INTRINSIC_NONE otherwise. */
1966 gfc_equivalent_op (gfc_intrinsic_op op
)
1971 return INTRINSIC_EQ_OS
;
1973 case INTRINSIC_EQ_OS
:
1974 return INTRINSIC_EQ
;
1977 return INTRINSIC_NE_OS
;
1979 case INTRINSIC_NE_OS
:
1980 return INTRINSIC_NE
;
1983 return INTRINSIC_GT_OS
;
1985 case INTRINSIC_GT_OS
:
1986 return INTRINSIC_GT
;
1989 return INTRINSIC_GE_OS
;
1991 case INTRINSIC_GE_OS
:
1992 return INTRINSIC_GE
;
1995 return INTRINSIC_LT_OS
;
1997 case INTRINSIC_LT_OS
:
1998 return INTRINSIC_LT
;
2001 return INTRINSIC_LE_OS
;
2003 case INTRINSIC_LE_OS
:
2004 return INTRINSIC_LE
;
2007 return INTRINSIC_NONE
;
2011 /* For the namespace, check generic, user operator and intrinsic
2012 operator interfaces for consistency and to remove duplicate
2013 interfaces. We traverse the whole namespace, counting on the fact
2014 that most symbols will not have generic or operator interfaces. */
2017 gfc_check_interfaces (gfc_namespace
*ns
)
2019 gfc_namespace
*old_ns
, *ns2
;
2020 char interface_name
[100];
2023 old_ns
= gfc_current_ns
;
2024 gfc_current_ns
= ns
;
2026 gfc_traverse_ns (ns
, check_sym_interfaces
);
2028 gfc_traverse_user_op (ns
, check_uop_interfaces
);
2030 for (i
= GFC_INTRINSIC_BEGIN
; i
!= GFC_INTRINSIC_END
; i
++)
2032 if (i
== INTRINSIC_USER
)
2035 if (i
== INTRINSIC_ASSIGN
)
2036 strcpy (interface_name
, "intrinsic assignment operator");
2038 sprintf (interface_name
, "intrinsic '%s' operator",
2039 gfc_op2string ((gfc_intrinsic_op
) i
));
2041 if (check_interface0 (ns
->op
[i
], interface_name
))
2045 gfc_check_operator_interface (ns
->op
[i
]->sym
, (gfc_intrinsic_op
) i
,
2048 for (ns2
= ns
; ns2
; ns2
= ns2
->parent
)
2050 gfc_intrinsic_op other_op
;
2052 if (check_interface1 (ns
->op
[i
], ns2
->op
[i
], 0,
2053 interface_name
, true))
2056 /* i should be gfc_intrinsic_op, but has to be int with this cast
2057 here for stupid C++ compatibility rules. */
2058 other_op
= gfc_equivalent_op ((gfc_intrinsic_op
) i
);
2059 if (other_op
!= INTRINSIC_NONE
2060 && check_interface1 (ns
->op
[i
], ns2
->op
[other_op
],
2061 0, interface_name
, true))
2067 gfc_current_ns
= old_ns
;
2071 /* Given a symbol of a formal argument list and an expression, if the
2072 formal argument is allocatable, check that the actual argument is
2073 allocatable. Returns nonzero if compatible, zero if not compatible. */
2076 compare_allocatable (gfc_symbol
*formal
, gfc_expr
*actual
)
2078 symbol_attribute attr
;
2080 if (formal
->attr
.allocatable
2081 || (formal
->ts
.type
== BT_CLASS
&& CLASS_DATA (formal
)->attr
.allocatable
))
2083 attr
= gfc_expr_attr (actual
);
2084 if (!attr
.allocatable
)
2092 /* Given a symbol of a formal argument list and an expression, if the
2093 formal argument is a pointer, see if the actual argument is a
2094 pointer. Returns nonzero if compatible, zero if not compatible. */
2097 compare_pointer (gfc_symbol
*formal
, gfc_expr
*actual
)
2099 symbol_attribute attr
;
2101 if (formal
->attr
.pointer
2102 || (formal
->ts
.type
== BT_CLASS
&& CLASS_DATA (formal
)
2103 && CLASS_DATA (formal
)->attr
.class_pointer
))
2105 attr
= gfc_expr_attr (actual
);
2107 /* Fortran 2008 allows non-pointer actual arguments. */
2108 if (!attr
.pointer
&& attr
.target
&& formal
->attr
.intent
== INTENT_IN
)
2119 /* Emit clear error messages for rank mismatch. */
2122 argument_rank_mismatch (const char *name
, locus
*where
,
2123 int rank1
, int rank2
)
2126 /* TS 29113, C407b. */
2129 gfc_error ("The assumed-rank array at %L requires that the dummy argument"
2130 " %qs has assumed-rank", where
, name
);
2132 else if (rank1
== 0)
2134 gfc_error (OPT_Wargument_mismatch
, "Rank mismatch in argument %qs at %L "
2135 "(scalar and rank-%d)", name
, where
, rank2
);
2137 else if (rank2
== 0)
2139 gfc_error (OPT_Wargument_mismatch
, "Rank mismatch in argument %qs at %L "
2140 "(rank-%d and scalar)", name
, where
, rank1
);
2144 gfc_error (OPT_Wargument_mismatch
, "Rank mismatch in argument %qs at %L "
2145 "(rank-%d and rank-%d)", name
, where
, rank1
, rank2
);
2150 /* Given a symbol of a formal argument list and an expression, see if
2151 the two are compatible as arguments. Returns nonzero if
2152 compatible, zero if not compatible. */
2155 compare_parameter (gfc_symbol
*formal
, gfc_expr
*actual
,
2156 int ranks_must_agree
, int is_elemental
, locus
*where
)
2159 bool rank_check
, is_pointer
;
2163 /* If the formal arg has type BT_VOID, it's to one of the iso_c_binding
2164 procs c_f_pointer or c_f_procpointer, and we need to accept most
2165 pointers the user could give us. This should allow that. */
2166 if (formal
->ts
.type
== BT_VOID
)
2169 if (formal
->ts
.type
== BT_DERIVED
2170 && formal
->ts
.u
.derived
&& formal
->ts
.u
.derived
->ts
.is_iso_c
2171 && actual
->ts
.type
== BT_DERIVED
2172 && actual
->ts
.u
.derived
&& actual
->ts
.u
.derived
->ts
.is_iso_c
)
2175 if (formal
->ts
.type
== BT_CLASS
&& actual
->ts
.type
== BT_DERIVED
)
2176 /* Make sure the vtab symbol is present when
2177 the module variables are generated. */
2178 gfc_find_derived_vtab (actual
->ts
.u
.derived
);
2180 if (actual
->ts
.type
== BT_PROCEDURE
)
2182 gfc_symbol
*act_sym
= actual
->symtree
->n
.sym
;
2184 if (formal
->attr
.flavor
!= FL_PROCEDURE
)
2187 gfc_error ("Invalid procedure argument at %L", &actual
->where
);
2191 if (!gfc_compare_interfaces (formal
, act_sym
, act_sym
->name
, 0, 1, err
,
2192 sizeof(err
), NULL
, NULL
))
2195 gfc_error (OPT_Wargument_mismatch
,
2196 "Interface mismatch in dummy procedure %qs at %L: %s",
2197 formal
->name
, &actual
->where
, err
);
2201 if (formal
->attr
.function
&& !act_sym
->attr
.function
)
2203 gfc_add_function (&act_sym
->attr
, act_sym
->name
,
2204 &act_sym
->declared_at
);
2205 if (act_sym
->ts
.type
== BT_UNKNOWN
2206 && !gfc_set_default_type (act_sym
, 1, act_sym
->ns
))
2209 else if (formal
->attr
.subroutine
&& !act_sym
->attr
.subroutine
)
2210 gfc_add_subroutine (&act_sym
->attr
, act_sym
->name
,
2211 &act_sym
->declared_at
);
2216 ppc
= gfc_get_proc_ptr_comp (actual
);
2217 if (ppc
&& ppc
->ts
.interface
)
2219 if (!gfc_compare_interfaces (formal
, ppc
->ts
.interface
, ppc
->name
, 0, 1,
2220 err
, sizeof(err
), NULL
, NULL
))
2223 gfc_error (OPT_Wargument_mismatch
,
2224 "Interface mismatch in dummy procedure %qs at %L: %s",
2225 formal
->name
, &actual
->where
, err
);
2231 if (formal
->attr
.pointer
&& formal
->attr
.contiguous
2232 && !gfc_is_simply_contiguous (actual
, true, false))
2235 gfc_error ("Actual argument to contiguous pointer dummy %qs at %L "
2236 "must be simply contiguous", formal
->name
, &actual
->where
);
2240 if ((actual
->expr_type
!= EXPR_NULL
|| actual
->ts
.type
!= BT_UNKNOWN
)
2241 && actual
->ts
.type
!= BT_HOLLERITH
2242 && formal
->ts
.type
!= BT_ASSUMED
2243 && !(formal
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
2244 && !gfc_compare_types (&formal
->ts
, &actual
->ts
)
2245 && !(formal
->ts
.type
== BT_DERIVED
&& actual
->ts
.type
== BT_CLASS
2246 && gfc_compare_derived_types (formal
->ts
.u
.derived
,
2247 CLASS_DATA (actual
)->ts
.u
.derived
)))
2250 gfc_error (OPT_Wargument_mismatch
,
2251 "Type mismatch in argument %qs at %L; passed %s to %s",
2252 formal
->name
, where
, gfc_typename (&actual
->ts
),
2253 gfc_typename (&formal
->ts
));
2257 if (actual
->ts
.type
== BT_ASSUMED
&& formal
->ts
.type
!= BT_ASSUMED
)
2260 gfc_error ("Assumed-type actual argument at %L requires that dummy "
2261 "argument %qs is of assumed type", &actual
->where
,
2266 /* F2008, 12.5.2.5; IR F08/0073. */
2267 if (formal
->ts
.type
== BT_CLASS
&& formal
->attr
.class_ok
2268 && actual
->expr_type
!= EXPR_NULL
2269 && ((CLASS_DATA (formal
)->attr
.class_pointer
2270 && formal
->attr
.intent
!= INTENT_IN
)
2271 || CLASS_DATA (formal
)->attr
.allocatable
))
2273 if (actual
->ts
.type
!= BT_CLASS
)
2276 gfc_error ("Actual argument to %qs at %L must be polymorphic",
2277 formal
->name
, &actual
->where
);
2281 if (!gfc_expr_attr (actual
).class_ok
)
2284 if ((!UNLIMITED_POLY (formal
) || !UNLIMITED_POLY(actual
))
2285 && !gfc_compare_derived_types (CLASS_DATA (actual
)->ts
.u
.derived
,
2286 CLASS_DATA (formal
)->ts
.u
.derived
))
2289 gfc_error ("Actual argument to %qs at %L must have the same "
2290 "declared type", formal
->name
, &actual
->where
);
2295 /* F08: 12.5.2.5 Allocatable and pointer dummy variables. However, this
2296 is necessary also for F03, so retain error for both.
2297 NOTE: Other type/kind errors pre-empt this error. Since they are F03
2298 compatible, no attempt has been made to channel to this one. */
2299 if (UNLIMITED_POLY (formal
) && !UNLIMITED_POLY (actual
)
2300 && (CLASS_DATA (formal
)->attr
.allocatable
2301 ||CLASS_DATA (formal
)->attr
.class_pointer
))
2304 gfc_error ("Actual argument to %qs at %L must be unlimited "
2305 "polymorphic since the formal argument is a "
2306 "pointer or allocatable unlimited polymorphic "
2307 "entity [F2008: 12.5.2.5]", formal
->name
,
2312 if (formal
->attr
.codimension
&& !gfc_is_coarray (actual
))
2315 gfc_error ("Actual argument to %qs at %L must be a coarray",
2316 formal
->name
, &actual
->where
);
2320 if (formal
->attr
.codimension
&& formal
->attr
.allocatable
)
2322 gfc_ref
*last
= NULL
;
2324 for (ref
= actual
->ref
; ref
; ref
= ref
->next
)
2325 if (ref
->type
== REF_COMPONENT
)
2328 /* F2008, 12.5.2.6. */
2329 if ((last
&& last
->u
.c
.component
->as
->corank
!= formal
->as
->corank
)
2331 && actual
->symtree
->n
.sym
->as
->corank
!= formal
->as
->corank
))
2334 gfc_error ("Corank mismatch in argument %qs at %L (%d and %d)",
2335 formal
->name
, &actual
->where
, formal
->as
->corank
,
2336 last
? last
->u
.c
.component
->as
->corank
2337 : actual
->symtree
->n
.sym
->as
->corank
);
2342 if (formal
->attr
.codimension
)
2344 /* F2008, 12.5.2.8 + Corrig 2 (IR F08/0048). */
2345 /* F2015, 12.5.2.8. */
2346 if (formal
->attr
.dimension
2347 && (formal
->attr
.contiguous
|| formal
->as
->type
!= AS_ASSUMED_SHAPE
)
2348 && gfc_expr_attr (actual
).dimension
2349 && !gfc_is_simply_contiguous (actual
, true, true))
2352 gfc_error ("Actual argument to %qs at %L must be simply "
2353 "contiguous or an element of such an array",
2354 formal
->name
, &actual
->where
);
2358 /* F2008, C1303 and C1304. */
2359 if (formal
->attr
.intent
!= INTENT_INOUT
2360 && (((formal
->ts
.type
== BT_DERIVED
|| formal
->ts
.type
== BT_CLASS
)
2361 && formal
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
2362 && formal
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
2363 || formal
->attr
.lock_comp
))
2367 gfc_error ("Actual argument to non-INTENT(INOUT) dummy %qs at %L, "
2368 "which is LOCK_TYPE or has a LOCK_TYPE component",
2369 formal
->name
, &actual
->where
);
2373 /* TS18508, C702/C703. */
2374 if (formal
->attr
.intent
!= INTENT_INOUT
2375 && (((formal
->ts
.type
== BT_DERIVED
|| formal
->ts
.type
== BT_CLASS
)
2376 && formal
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
2377 && formal
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
2378 || formal
->attr
.event_comp
))
2382 gfc_error ("Actual argument to non-INTENT(INOUT) dummy %qs at %L, "
2383 "which is EVENT_TYPE or has a EVENT_TYPE component",
2384 formal
->name
, &actual
->where
);
2389 /* F2008, C1239/C1240. */
2390 if (actual
->expr_type
== EXPR_VARIABLE
2391 && (actual
->symtree
->n
.sym
->attr
.asynchronous
2392 || actual
->symtree
->n
.sym
->attr
.volatile_
)
2393 && (formal
->attr
.asynchronous
|| formal
->attr
.volatile_
)
2394 && actual
->rank
&& formal
->as
2395 && !gfc_is_simply_contiguous (actual
, true, false)
2396 && ((formal
->as
->type
!= AS_ASSUMED_SHAPE
2397 && formal
->as
->type
!= AS_ASSUMED_RANK
&& !formal
->attr
.pointer
)
2398 || formal
->attr
.contiguous
))
2401 gfc_error ("Dummy argument %qs has to be a pointer, assumed-shape or "
2402 "assumed-rank array without CONTIGUOUS attribute - as actual"
2403 " argument at %L is not simply contiguous and both are "
2404 "ASYNCHRONOUS or VOLATILE", formal
->name
, &actual
->where
);
2408 if (formal
->attr
.allocatable
&& !formal
->attr
.codimension
2409 && gfc_expr_attr (actual
).codimension
)
2411 if (formal
->attr
.intent
== INTENT_OUT
)
2414 gfc_error ("Passing coarray at %L to allocatable, noncoarray, "
2415 "INTENT(OUT) dummy argument %qs", &actual
->where
,
2419 else if (warn_surprising
&& where
&& formal
->attr
.intent
!= INTENT_IN
)
2420 gfc_warning (OPT_Wsurprising
,
2421 "Passing coarray at %L to allocatable, noncoarray dummy "
2422 "argument %qs, which is invalid if the allocation status"
2423 " is modified", &actual
->where
, formal
->name
);
2426 /* If the rank is the same or the formal argument has assumed-rank. */
2427 if (symbol_rank (formal
) == actual
->rank
|| symbol_rank (formal
) == -1)
2430 rank_check
= where
!= NULL
&& !is_elemental
&& formal
->as
2431 && (formal
->as
->type
== AS_ASSUMED_SHAPE
2432 || formal
->as
->type
== AS_DEFERRED
)
2433 && actual
->expr_type
!= EXPR_NULL
;
2435 /* Skip rank checks for NO_ARG_CHECK. */
2436 if (formal
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
2439 /* Scalar & coindexed, see: F2008, Section 12.5.2.4. */
2440 if (rank_check
|| ranks_must_agree
2441 || (formal
->attr
.pointer
&& actual
->expr_type
!= EXPR_NULL
)
2442 || (actual
->rank
!= 0 && !(is_elemental
|| formal
->attr
.dimension
))
2443 || (actual
->rank
== 0
2444 && ((formal
->ts
.type
== BT_CLASS
2445 && CLASS_DATA (formal
)->as
->type
== AS_ASSUMED_SHAPE
)
2446 || (formal
->ts
.type
!= BT_CLASS
2447 && formal
->as
->type
== AS_ASSUMED_SHAPE
))
2448 && actual
->expr_type
!= EXPR_NULL
)
2449 || (actual
->rank
== 0 && formal
->attr
.dimension
2450 && gfc_is_coindexed (actual
)))
2453 argument_rank_mismatch (formal
->name
, &actual
->where
,
2454 symbol_rank (formal
), actual
->rank
);
2457 else if (actual
->rank
!= 0 && (is_elemental
|| formal
->attr
.dimension
))
2460 /* At this point, we are considering a scalar passed to an array. This
2461 is valid (cf. F95 12.4.1.1, F2003 12.4.1.2, and F2008 12.5.2.4),
2462 - if the actual argument is (a substring of) an element of a
2463 non-assumed-shape/non-pointer/non-polymorphic array; or
2464 - (F2003) if the actual argument is of type character of default/c_char
2467 is_pointer
= actual
->expr_type
== EXPR_VARIABLE
2468 ? actual
->symtree
->n
.sym
->attr
.pointer
: false;
2470 for (ref
= actual
->ref
; ref
; ref
= ref
->next
)
2472 if (ref
->type
== REF_COMPONENT
)
2473 is_pointer
= ref
->u
.c
.component
->attr
.pointer
;
2474 else if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.type
== AR_ELEMENT
2475 && ref
->u
.ar
.dimen
> 0
2477 || (ref
->next
->type
== REF_SUBSTRING
&& !ref
->next
->next
)))
2481 if (actual
->ts
.type
== BT_CLASS
&& actual
->expr_type
!= EXPR_NULL
)
2484 gfc_error ("Polymorphic scalar passed to array dummy argument %qs "
2485 "at %L", formal
->name
, &actual
->where
);
2489 if (actual
->expr_type
!= EXPR_NULL
&& ref
&& actual
->ts
.type
!= BT_CHARACTER
2490 && (is_pointer
|| ref
->u
.ar
.as
->type
== AS_ASSUMED_SHAPE
))
2493 gfc_error ("Element of assumed-shaped or pointer "
2494 "array passed to array dummy argument %qs at %L",
2495 formal
->name
, &actual
->where
);
2499 if (actual
->ts
.type
== BT_CHARACTER
&& actual
->expr_type
!= EXPR_NULL
2500 && (!ref
|| is_pointer
|| ref
->u
.ar
.as
->type
== AS_ASSUMED_SHAPE
))
2502 if (formal
->ts
.kind
!= 1 && (gfc_option
.allow_std
& GFC_STD_GNU
) == 0)
2505 gfc_error ("Extension: Scalar non-default-kind, non-C_CHAR-kind "
2506 "CHARACTER actual argument with array dummy argument "
2507 "%qs at %L", formal
->name
, &actual
->where
);
2511 if (where
&& (gfc_option
.allow_std
& GFC_STD_F2003
) == 0)
2513 gfc_error ("Fortran 2003: Scalar CHARACTER actual argument with "
2514 "array dummy argument %qs at %L",
2515 formal
->name
, &actual
->where
);
2518 else if ((gfc_option
.allow_std
& GFC_STD_F2003
) == 0)
2524 if (ref
== NULL
&& actual
->expr_type
!= EXPR_NULL
)
2527 argument_rank_mismatch (formal
->name
, &actual
->where
,
2528 symbol_rank (formal
), actual
->rank
);
2536 /* Returns the storage size of a symbol (formal argument) or
2537 zero if it cannot be determined. */
2539 static unsigned long
2540 get_sym_storage_size (gfc_symbol
*sym
)
2543 unsigned long strlen
, elements
;
2545 if (sym
->ts
.type
== BT_CHARACTER
)
2547 if (sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
2548 && sym
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
2549 strlen
= mpz_get_ui (sym
->ts
.u
.cl
->length
->value
.integer
);
2556 if (symbol_rank (sym
) == 0)
2560 if (sym
->as
->type
!= AS_EXPLICIT
)
2562 for (i
= 0; i
< sym
->as
->rank
; i
++)
2564 if (sym
->as
->upper
[i
]->expr_type
!= EXPR_CONSTANT
2565 || sym
->as
->lower
[i
]->expr_type
!= EXPR_CONSTANT
)
2568 elements
*= mpz_get_si (sym
->as
->upper
[i
]->value
.integer
)
2569 - mpz_get_si (sym
->as
->lower
[i
]->value
.integer
) + 1L;
2572 return strlen
*elements
;
2576 /* Returns the storage size of an expression (actual argument) or
2577 zero if it cannot be determined. For an array element, it returns
2578 the remaining size as the element sequence consists of all storage
2579 units of the actual argument up to the end of the array. */
2581 static unsigned long
2582 get_expr_storage_size (gfc_expr
*e
)
2585 long int strlen
, elements
;
2586 long int substrlen
= 0;
2587 bool is_str_storage
= false;
2593 if (e
->ts
.type
== BT_CHARACTER
)
2595 if (e
->ts
.u
.cl
&& e
->ts
.u
.cl
->length
2596 && e
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
2597 strlen
= mpz_get_si (e
->ts
.u
.cl
->length
->value
.integer
);
2598 else if (e
->expr_type
== EXPR_CONSTANT
2599 && (e
->ts
.u
.cl
== NULL
|| e
->ts
.u
.cl
->length
== NULL
))
2600 strlen
= e
->value
.character
.length
;
2605 strlen
= 1; /* Length per element. */
2607 if (e
->rank
== 0 && !e
->ref
)
2615 for (i
= 0; i
< e
->rank
; i
++)
2616 elements
*= mpz_get_si (e
->shape
[i
]);
2617 return elements
*strlen
;
2620 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
2622 if (ref
->type
== REF_SUBSTRING
&& ref
->u
.ss
.start
2623 && ref
->u
.ss
.start
->expr_type
== EXPR_CONSTANT
)
2627 /* The string length is the substring length.
2628 Set now to full string length. */
2629 if (!ref
->u
.ss
.length
|| !ref
->u
.ss
.length
->length
2630 || ref
->u
.ss
.length
->length
->expr_type
!= EXPR_CONSTANT
)
2633 strlen
= mpz_get_ui (ref
->u
.ss
.length
->length
->value
.integer
);
2635 substrlen
= strlen
- mpz_get_ui (ref
->u
.ss
.start
->value
.integer
) + 1;
2639 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.type
== AR_SECTION
)
2640 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
2642 long int start
, end
, stride
;
2645 if (ref
->u
.ar
.stride
[i
])
2647 if (ref
->u
.ar
.stride
[i
]->expr_type
== EXPR_CONSTANT
)
2648 stride
= mpz_get_si (ref
->u
.ar
.stride
[i
]->value
.integer
);
2653 if (ref
->u
.ar
.start
[i
])
2655 if (ref
->u
.ar
.start
[i
]->expr_type
== EXPR_CONSTANT
)
2656 start
= mpz_get_si (ref
->u
.ar
.start
[i
]->value
.integer
);
2660 else if (ref
->u
.ar
.as
->lower
[i
]
2661 && ref
->u
.ar
.as
->lower
[i
]->expr_type
== EXPR_CONSTANT
)
2662 start
= mpz_get_si (ref
->u
.ar
.as
->lower
[i
]->value
.integer
);
2666 if (ref
->u
.ar
.end
[i
])
2668 if (ref
->u
.ar
.end
[i
]->expr_type
== EXPR_CONSTANT
)
2669 end
= mpz_get_si (ref
->u
.ar
.end
[i
]->value
.integer
);
2673 else if (ref
->u
.ar
.as
->upper
[i
]
2674 && ref
->u
.ar
.as
->upper
[i
]->expr_type
== EXPR_CONSTANT
)
2675 end
= mpz_get_si (ref
->u
.ar
.as
->upper
[i
]->value
.integer
);
2679 elements
*= (end
- start
)/stride
+ 1L;
2681 else if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.type
== AR_FULL
)
2682 for (i
= 0; i
< ref
->u
.ar
.as
->rank
; i
++)
2684 if (ref
->u
.ar
.as
->lower
[i
] && ref
->u
.ar
.as
->upper
[i
]
2685 && ref
->u
.ar
.as
->lower
[i
]->expr_type
== EXPR_CONSTANT
2686 && ref
->u
.ar
.as
->lower
[i
]->ts
.type
== BT_INTEGER
2687 && ref
->u
.ar
.as
->upper
[i
]->expr_type
== EXPR_CONSTANT
2688 && ref
->u
.ar
.as
->upper
[i
]->ts
.type
== BT_INTEGER
)
2689 elements
*= mpz_get_si (ref
->u
.ar
.as
->upper
[i
]->value
.integer
)
2690 - mpz_get_si (ref
->u
.ar
.as
->lower
[i
]->value
.integer
)
2695 else if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.type
== AR_ELEMENT
2696 && e
->expr_type
== EXPR_VARIABLE
)
2698 if (ref
->u
.ar
.as
->type
== AS_ASSUMED_SHAPE
2699 || e
->symtree
->n
.sym
->attr
.pointer
)
2705 /* Determine the number of remaining elements in the element
2706 sequence for array element designators. */
2707 is_str_storage
= true;
2708 for (i
= ref
->u
.ar
.dimen
- 1; i
>= 0; i
--)
2710 if (ref
->u
.ar
.start
[i
] == NULL
2711 || ref
->u
.ar
.start
[i
]->expr_type
!= EXPR_CONSTANT
2712 || ref
->u
.ar
.as
->upper
[i
] == NULL
2713 || ref
->u
.ar
.as
->lower
[i
] == NULL
2714 || ref
->u
.ar
.as
->upper
[i
]->expr_type
!= EXPR_CONSTANT
2715 || ref
->u
.ar
.as
->lower
[i
]->expr_type
!= EXPR_CONSTANT
)
2720 * (mpz_get_si (ref
->u
.ar
.as
->upper
[i
]->value
.integer
)
2721 - mpz_get_si (ref
->u
.ar
.as
->lower
[i
]->value
.integer
)
2723 - (mpz_get_si (ref
->u
.ar
.start
[i
]->value
.integer
)
2724 - mpz_get_si (ref
->u
.ar
.as
->lower
[i
]->value
.integer
));
2727 else if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.function
2728 && ref
->u
.c
.component
->attr
.proc_pointer
2729 && ref
->u
.c
.component
->attr
.dimension
)
2731 /* Array-valued procedure-pointer components. */
2732 gfc_array_spec
*as
= ref
->u
.c
.component
->as
;
2733 for (i
= 0; i
< as
->rank
; i
++)
2735 if (!as
->upper
[i
] || !as
->lower
[i
]
2736 || as
->upper
[i
]->expr_type
!= EXPR_CONSTANT
2737 || as
->lower
[i
]->expr_type
!= EXPR_CONSTANT
)
2741 * (mpz_get_si (as
->upper
[i
]->value
.integer
)
2742 - mpz_get_si (as
->lower
[i
]->value
.integer
) + 1L);
2748 return (is_str_storage
) ? substrlen
+ (elements
-1)*strlen
2751 return elements
*strlen
;
2755 /* Given an expression, check whether it is an array section
2756 which has a vector subscript. If it has, one is returned,
2760 gfc_has_vector_subscript (gfc_expr
*e
)
2765 if (e
== NULL
|| e
->rank
== 0 || e
->expr_type
!= EXPR_VARIABLE
)
2768 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
2769 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.type
== AR_SECTION
)
2770 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
2771 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
)
2779 is_procptr_result (gfc_expr
*expr
)
2781 gfc_component
*c
= gfc_get_proc_ptr_comp (expr
);
2783 return (c
->ts
.interface
&& (c
->ts
.interface
->attr
.proc_pointer
== 1));
2785 return ((expr
->symtree
->n
.sym
->result
!= expr
->symtree
->n
.sym
)
2786 && (expr
->symtree
->n
.sym
->result
->attr
.proc_pointer
== 1));
2790 /* Given formal and actual argument lists, see if they are compatible.
2791 If they are compatible, the actual argument list is sorted to
2792 correspond with the formal list, and elements for missing optional
2793 arguments are inserted. If WHERE pointer is nonnull, then we issue
2794 errors when things don't match instead of just returning the status
2798 compare_actual_formal (gfc_actual_arglist
**ap
, gfc_formal_arglist
*formal
,
2799 int ranks_must_agree
, int is_elemental
, locus
*where
)
2801 gfc_actual_arglist
**new_arg
, *a
, *actual
;
2802 gfc_formal_arglist
*f
;
2804 unsigned long actual_size
, formal_size
;
2805 bool full_array
= false;
2809 if (actual
== NULL
&& formal
== NULL
)
2813 for (f
= formal
; f
; f
= f
->next
)
2816 new_arg
= XALLOCAVEC (gfc_actual_arglist
*, n
);
2818 for (i
= 0; i
< n
; i
++)
2825 for (a
= actual
; a
; a
= a
->next
, f
= f
->next
)
2827 /* Look for keywords but ignore g77 extensions like %VAL. */
2828 if (a
->name
!= NULL
&& a
->name
[0] != '%')
2831 for (f
= formal
; f
; f
= f
->next
, i
++)
2835 if (strcmp (f
->sym
->name
, a
->name
) == 0)
2842 gfc_error ("Keyword argument %qs at %L is not in "
2843 "the procedure", a
->name
, &a
->expr
->where
);
2847 if (new_arg
[i
] != NULL
)
2850 gfc_error ("Keyword argument %qs at %L is already associated "
2851 "with another actual argument", a
->name
,
2860 gfc_error ("More actual than formal arguments in procedure "
2861 "call at %L", where
);
2866 if (f
->sym
== NULL
&& a
->expr
== NULL
)
2872 gfc_error ("Missing alternate return spec in subroutine call "
2877 if (a
->expr
== NULL
)
2880 gfc_error ("Unexpected alternate return spec in subroutine "
2881 "call at %L", where
);
2885 /* Make sure that intrinsic vtables exist for calls to unlimited
2886 polymorphic formal arguments. */
2887 if (UNLIMITED_POLY (f
->sym
)
2888 && a
->expr
->ts
.type
!= BT_DERIVED
2889 && a
->expr
->ts
.type
!= BT_CLASS
)
2890 gfc_find_vtab (&a
->expr
->ts
);
2892 if (a
->expr
->expr_type
== EXPR_NULL
2893 && ((f
->sym
->ts
.type
!= BT_CLASS
&& !f
->sym
->attr
.pointer
2894 && (f
->sym
->attr
.allocatable
|| !f
->sym
->attr
.optional
2895 || (gfc_option
.allow_std
& GFC_STD_F2008
) == 0))
2896 || (f
->sym
->ts
.type
== BT_CLASS
2897 && !CLASS_DATA (f
->sym
)->attr
.class_pointer
2898 && (CLASS_DATA (f
->sym
)->attr
.allocatable
2899 || !f
->sym
->attr
.optional
2900 || (gfc_option
.allow_std
& GFC_STD_F2008
) == 0))))
2903 && (!f
->sym
->attr
.optional
2904 || (f
->sym
->ts
.type
!= BT_CLASS
&& f
->sym
->attr
.allocatable
)
2905 || (f
->sym
->ts
.type
== BT_CLASS
2906 && CLASS_DATA (f
->sym
)->attr
.allocatable
)))
2907 gfc_error ("Unexpected NULL() intrinsic at %L to dummy %qs",
2908 where
, f
->sym
->name
);
2910 gfc_error ("Fortran 2008: Null pointer at %L to non-pointer "
2911 "dummy %qs", where
, f
->sym
->name
);
2916 if (!compare_parameter (f
->sym
, a
->expr
, ranks_must_agree
,
2917 is_elemental
, where
))
2920 /* TS 29113, 6.3p2. */
2921 if (f
->sym
->ts
.type
== BT_ASSUMED
2922 && (a
->expr
->ts
.type
== BT_DERIVED
2923 || (a
->expr
->ts
.type
== BT_CLASS
&& CLASS_DATA (a
->expr
))))
2925 gfc_namespace
*f2k_derived
;
2927 f2k_derived
= a
->expr
->ts
.type
== BT_DERIVED
2928 ? a
->expr
->ts
.u
.derived
->f2k_derived
2929 : CLASS_DATA (a
->expr
)->ts
.u
.derived
->f2k_derived
;
2932 && (f2k_derived
->finalizers
|| f2k_derived
->tb_sym_root
))
2934 gfc_error ("Actual argument at %L to assumed-type dummy is of "
2935 "derived type with type-bound or FINAL procedures",
2941 /* Special case for character arguments. For allocatable, pointer
2942 and assumed-shape dummies, the string length needs to match
2944 if (a
->expr
->ts
.type
== BT_CHARACTER
2945 && a
->expr
->ts
.u
.cl
&& a
->expr
->ts
.u
.cl
->length
2946 && a
->expr
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
2947 && f
->sym
->ts
.u
.cl
&& f
->sym
->ts
.u
.cl
&& f
->sym
->ts
.u
.cl
->length
2948 && f
->sym
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
2949 && (f
->sym
->attr
.pointer
|| f
->sym
->attr
.allocatable
2950 || (f
->sym
->as
&& f
->sym
->as
->type
== AS_ASSUMED_SHAPE
))
2951 && (mpz_cmp (a
->expr
->ts
.u
.cl
->length
->value
.integer
,
2952 f
->sym
->ts
.u
.cl
->length
->value
.integer
) != 0))
2954 if (where
&& (f
->sym
->attr
.pointer
|| f
->sym
->attr
.allocatable
))
2955 gfc_warning (OPT_Wargument_mismatch
,
2956 "Character length mismatch (%ld/%ld) between actual "
2957 "argument and pointer or allocatable dummy argument "
2959 mpz_get_si (a
->expr
->ts
.u
.cl
->length
->value
.integer
),
2960 mpz_get_si (f
->sym
->ts
.u
.cl
->length
->value
.integer
),
2961 f
->sym
->name
, &a
->expr
->where
);
2963 gfc_warning (OPT_Wargument_mismatch
,
2964 "Character length mismatch (%ld/%ld) between actual "
2965 "argument and assumed-shape dummy argument %qs "
2967 mpz_get_si (a
->expr
->ts
.u
.cl
->length
->value
.integer
),
2968 mpz_get_si (f
->sym
->ts
.u
.cl
->length
->value
.integer
),
2969 f
->sym
->name
, &a
->expr
->where
);
2973 if ((f
->sym
->attr
.pointer
|| f
->sym
->attr
.allocatable
)
2974 && f
->sym
->ts
.deferred
!= a
->expr
->ts
.deferred
2975 && a
->expr
->ts
.type
== BT_CHARACTER
)
2978 gfc_error ("Actual argument at %L to allocatable or "
2979 "pointer dummy argument %qs must have a deferred "
2980 "length type parameter if and only if the dummy has one",
2981 &a
->expr
->where
, f
->sym
->name
);
2985 if (f
->sym
->ts
.type
== BT_CLASS
)
2986 goto skip_size_check
;
2988 actual_size
= get_expr_storage_size (a
->expr
);
2989 formal_size
= get_sym_storage_size (f
->sym
);
2990 if (actual_size
!= 0 && actual_size
< formal_size
2991 && a
->expr
->ts
.type
!= BT_PROCEDURE
2992 && f
->sym
->attr
.flavor
!= FL_PROCEDURE
)
2994 if (a
->expr
->ts
.type
== BT_CHARACTER
&& !f
->sym
->as
&& where
)
2995 gfc_warning (OPT_Wargument_mismatch
,
2996 "Character length of actual argument shorter "
2997 "than of dummy argument %qs (%lu/%lu) at %L",
2998 f
->sym
->name
, actual_size
, formal_size
,
3001 gfc_warning (OPT_Wargument_mismatch
,
3002 "Actual argument contains too few "
3003 "elements for dummy argument %qs (%lu/%lu) at %L",
3004 f
->sym
->name
, actual_size
, formal_size
,
3011 /* Satisfy F03:12.4.1.3 by ensuring that a procedure pointer actual
3012 argument is provided for a procedure pointer formal argument. */
3013 if (f
->sym
->attr
.proc_pointer
3014 && !((a
->expr
->expr_type
== EXPR_VARIABLE
3015 && (a
->expr
->symtree
->n
.sym
->attr
.proc_pointer
3016 || gfc_is_proc_ptr_comp (a
->expr
)))
3017 || (a
->expr
->expr_type
== EXPR_FUNCTION
3018 && is_procptr_result (a
->expr
))))
3021 gfc_error ("Expected a procedure pointer for argument %qs at %L",
3022 f
->sym
->name
, &a
->expr
->where
);
3026 /* Satisfy F03:12.4.1.3 by ensuring that a procedure actual argument is
3027 provided for a procedure formal argument. */
3028 if (f
->sym
->attr
.flavor
== FL_PROCEDURE
3029 && !((a
->expr
->expr_type
== EXPR_VARIABLE
3030 && (a
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
3031 || a
->expr
->symtree
->n
.sym
->attr
.proc_pointer
3032 || gfc_is_proc_ptr_comp (a
->expr
)))
3033 || (a
->expr
->expr_type
== EXPR_FUNCTION
3034 && is_procptr_result (a
->expr
))))
3037 gfc_error ("Expected a procedure for argument %qs at %L",
3038 f
->sym
->name
, &a
->expr
->where
);
3042 if (f
->sym
->as
&& f
->sym
->as
->type
== AS_ASSUMED_SHAPE
3043 && a
->expr
->expr_type
== EXPR_VARIABLE
3044 && a
->expr
->symtree
->n
.sym
->as
3045 && a
->expr
->symtree
->n
.sym
->as
->type
== AS_ASSUMED_SIZE
3046 && (a
->expr
->ref
== NULL
3047 || (a
->expr
->ref
->type
== REF_ARRAY
3048 && a
->expr
->ref
->u
.ar
.type
== AR_FULL
)))
3051 gfc_error ("Actual argument for %qs cannot be an assumed-size"
3052 " array at %L", f
->sym
->name
, where
);
3056 if (a
->expr
->expr_type
!= EXPR_NULL
3057 && compare_pointer (f
->sym
, a
->expr
) == 0)
3060 gfc_error ("Actual argument for %qs must be a pointer at %L",
3061 f
->sym
->name
, &a
->expr
->where
);
3065 if (a
->expr
->expr_type
!= EXPR_NULL
3066 && (gfc_option
.allow_std
& GFC_STD_F2008
) == 0
3067 && compare_pointer (f
->sym
, a
->expr
) == 2)
3070 gfc_error ("Fortran 2008: Non-pointer actual argument at %L to "
3071 "pointer dummy %qs", &a
->expr
->where
,f
->sym
->name
);
3076 /* Fortran 2008, C1242. */
3077 if (f
->sym
->attr
.pointer
&& gfc_is_coindexed (a
->expr
))
3080 gfc_error ("Coindexed actual argument at %L to pointer "
3082 &a
->expr
->where
, f
->sym
->name
);
3086 /* Fortran 2008, 12.5.2.5 (no constraint). */
3087 if (a
->expr
->expr_type
== EXPR_VARIABLE
3088 && f
->sym
->attr
.intent
!= INTENT_IN
3089 && f
->sym
->attr
.allocatable
3090 && gfc_is_coindexed (a
->expr
))
3093 gfc_error ("Coindexed actual argument at %L to allocatable "
3094 "dummy %qs requires INTENT(IN)",
3095 &a
->expr
->where
, f
->sym
->name
);
3099 /* Fortran 2008, C1237. */
3100 if (a
->expr
->expr_type
== EXPR_VARIABLE
3101 && (f
->sym
->attr
.asynchronous
|| f
->sym
->attr
.volatile_
)
3102 && gfc_is_coindexed (a
->expr
)
3103 && (a
->expr
->symtree
->n
.sym
->attr
.volatile_
3104 || a
->expr
->symtree
->n
.sym
->attr
.asynchronous
))
3107 gfc_error ("Coindexed ASYNCHRONOUS or VOLATILE actual argument at "
3108 "%L requires that dummy %qs has neither "
3109 "ASYNCHRONOUS nor VOLATILE", &a
->expr
->where
,
3114 /* Fortran 2008, 12.5.2.4 (no constraint). */
3115 if (a
->expr
->expr_type
== EXPR_VARIABLE
3116 && f
->sym
->attr
.intent
!= INTENT_IN
&& !f
->sym
->attr
.value
3117 && gfc_is_coindexed (a
->expr
)
3118 && gfc_has_ultimate_allocatable (a
->expr
))
3121 gfc_error ("Coindexed actual argument at %L with allocatable "
3122 "ultimate component to dummy %qs requires either VALUE "
3123 "or INTENT(IN)", &a
->expr
->where
, f
->sym
->name
);
3127 if (f
->sym
->ts
.type
== BT_CLASS
3128 && CLASS_DATA (f
->sym
)->attr
.allocatable
3129 && gfc_is_class_array_ref (a
->expr
, &full_array
)
3133 gfc_error ("Actual CLASS array argument for %qs must be a full "
3134 "array at %L", f
->sym
->name
, &a
->expr
->where
);
3139 if (a
->expr
->expr_type
!= EXPR_NULL
3140 && compare_allocatable (f
->sym
, a
->expr
) == 0)
3143 gfc_error ("Actual argument for %qs must be ALLOCATABLE at %L",
3144 f
->sym
->name
, &a
->expr
->where
);
3148 /* Check intent = OUT/INOUT for definable actual argument. */
3149 if ((f
->sym
->attr
.intent
== INTENT_OUT
3150 || f
->sym
->attr
.intent
== INTENT_INOUT
))
3152 const char* context
= (where
3153 ? _("actual argument to INTENT = OUT/INOUT")
3156 if (((f
->sym
->ts
.type
== BT_CLASS
&& f
->sym
->attr
.class_ok
3157 && CLASS_DATA (f
->sym
)->attr
.class_pointer
)
3158 || (f
->sym
->ts
.type
!= BT_CLASS
&& f
->sym
->attr
.pointer
))
3159 && !gfc_check_vardef_context (a
->expr
, true, false, false, context
))
3161 if (!gfc_check_vardef_context (a
->expr
, false, false, false, context
))
3165 if ((f
->sym
->attr
.intent
== INTENT_OUT
3166 || f
->sym
->attr
.intent
== INTENT_INOUT
3167 || f
->sym
->attr
.volatile_
3168 || f
->sym
->attr
.asynchronous
)
3169 && gfc_has_vector_subscript (a
->expr
))
3172 gfc_error ("Array-section actual argument with vector "
3173 "subscripts at %L is incompatible with INTENT(OUT), "
3174 "INTENT(INOUT), VOLATILE or ASYNCHRONOUS attribute "
3175 "of the dummy argument %qs",
3176 &a
->expr
->where
, f
->sym
->name
);
3180 /* C1232 (R1221) For an actual argument which is an array section or
3181 an assumed-shape array, the dummy argument shall be an assumed-
3182 shape array, if the dummy argument has the VOLATILE attribute. */
3184 if (f
->sym
->attr
.volatile_
3185 && a
->expr
->expr_type
== EXPR_VARIABLE
3186 && a
->expr
->symtree
->n
.sym
->as
3187 && a
->expr
->symtree
->n
.sym
->as
->type
== AS_ASSUMED_SHAPE
3188 && !(f
->sym
->as
&& f
->sym
->as
->type
== AS_ASSUMED_SHAPE
))
3191 gfc_error ("Assumed-shape actual argument at %L is "
3192 "incompatible with the non-assumed-shape "
3193 "dummy argument %qs due to VOLATILE attribute",
3194 &a
->expr
->where
,f
->sym
->name
);
3198 if (f
->sym
->attr
.volatile_
3199 && a
->expr
->ref
&& a
->expr
->ref
->u
.ar
.type
== AR_SECTION
3200 && !(f
->sym
->as
&& f
->sym
->as
->type
== AS_ASSUMED_SHAPE
))
3203 gfc_error ("Array-section actual argument at %L is "
3204 "incompatible with the non-assumed-shape "
3205 "dummy argument %qs due to VOLATILE attribute",
3206 &a
->expr
->where
,f
->sym
->name
);
3210 /* C1233 (R1221) For an actual argument which is a pointer array, the
3211 dummy argument shall be an assumed-shape or pointer array, if the
3212 dummy argument has the VOLATILE attribute. */
3214 if (f
->sym
->attr
.volatile_
3215 && a
->expr
->expr_type
== EXPR_VARIABLE
3216 && a
->expr
->symtree
->n
.sym
->attr
.pointer
3217 && a
->expr
->symtree
->n
.sym
->as
3219 && (f
->sym
->as
->type
== AS_ASSUMED_SHAPE
3220 || f
->sym
->attr
.pointer
)))
3223 gfc_error ("Pointer-array actual argument at %L requires "
3224 "an assumed-shape or pointer-array dummy "
3225 "argument %qs due to VOLATILE attribute",
3226 &a
->expr
->where
,f
->sym
->name
);
3237 /* Make sure missing actual arguments are optional. */
3239 for (f
= formal
; f
; f
= f
->next
, i
++)
3241 if (new_arg
[i
] != NULL
)
3246 gfc_error ("Missing alternate return spec in subroutine call "
3250 if (!f
->sym
->attr
.optional
)
3253 gfc_error ("Missing actual argument for argument %qs at %L",
3254 f
->sym
->name
, where
);
3259 /* The argument lists are compatible. We now relink a new actual
3260 argument list with null arguments in the right places. The head
3261 of the list remains the head. */
3262 for (i
= 0; i
< n
; i
++)
3263 if (new_arg
[i
] == NULL
)
3264 new_arg
[i
] = gfc_get_actual_arglist ();
3268 std::swap (*new_arg
[0], *actual
);
3269 std::swap (new_arg
[0], new_arg
[na
]);
3272 for (i
= 0; i
< n
- 1; i
++)
3273 new_arg
[i
]->next
= new_arg
[i
+ 1];
3275 new_arg
[i
]->next
= NULL
;
3277 if (*ap
== NULL
&& n
> 0)
3280 /* Note the types of omitted optional arguments. */
3281 for (a
= *ap
, f
= formal
; a
; a
= a
->next
, f
= f
->next
)
3282 if (a
->expr
== NULL
&& a
->label
== NULL
)
3283 a
->missing_arg_type
= f
->sym
->ts
.type
;
3291 gfc_formal_arglist
*f
;
3292 gfc_actual_arglist
*a
;
3296 /* qsort comparison function for argument pairs, with the following
3298 - p->a->expr == NULL
3299 - p->a->expr->expr_type != EXPR_VARIABLE
3300 - growing p->a->expr->symbol. */
3303 pair_cmp (const void *p1
, const void *p2
)
3305 const gfc_actual_arglist
*a1
, *a2
;
3307 /* *p1 and *p2 are elements of the to-be-sorted array. */
3308 a1
= ((const argpair
*) p1
)->a
;
3309 a2
= ((const argpair
*) p2
)->a
;
3318 if (a1
->expr
->expr_type
!= EXPR_VARIABLE
)
3320 if (a2
->expr
->expr_type
!= EXPR_VARIABLE
)
3324 if (a2
->expr
->expr_type
!= EXPR_VARIABLE
)
3326 return a1
->expr
->symtree
->n
.sym
< a2
->expr
->symtree
->n
.sym
;
3330 /* Given two expressions from some actual arguments, test whether they
3331 refer to the same expression. The analysis is conservative.
3332 Returning false will produce no warning. */
3335 compare_actual_expr (gfc_expr
*e1
, gfc_expr
*e2
)
3337 const gfc_ref
*r1
, *r2
;
3340 || e1
->expr_type
!= EXPR_VARIABLE
3341 || e2
->expr_type
!= EXPR_VARIABLE
3342 || e1
->symtree
->n
.sym
!= e2
->symtree
->n
.sym
)
3345 /* TODO: improve comparison, see expr.c:show_ref(). */
3346 for (r1
= e1
->ref
, r2
= e2
->ref
; r1
&& r2
; r1
= r1
->next
, r2
= r2
->next
)
3348 if (r1
->type
!= r2
->type
)
3353 if (r1
->u
.ar
.type
!= r2
->u
.ar
.type
)
3355 /* TODO: At the moment, consider only full arrays;
3356 we could do better. */
3357 if (r1
->u
.ar
.type
!= AR_FULL
|| r2
->u
.ar
.type
!= AR_FULL
)
3362 if (r1
->u
.c
.component
!= r2
->u
.c
.component
)
3370 gfc_internal_error ("compare_actual_expr(): Bad component code");
3379 /* Given formal and actual argument lists that correspond to one
3380 another, check that identical actual arguments aren't not
3381 associated with some incompatible INTENTs. */
3384 check_some_aliasing (gfc_formal_arglist
*f
, gfc_actual_arglist
*a
)
3386 sym_intent f1_intent
, f2_intent
;
3387 gfc_formal_arglist
*f1
;
3388 gfc_actual_arglist
*a1
;
3394 for (f1
= f
, a1
= a
;; f1
= f1
->next
, a1
= a1
->next
)
3396 if (f1
== NULL
&& a1
== NULL
)
3398 if (f1
== NULL
|| a1
== NULL
)
3399 gfc_internal_error ("check_some_aliasing(): List mismatch");
3404 p
= XALLOCAVEC (argpair
, n
);
3406 for (i
= 0, f1
= f
, a1
= a
; i
< n
; i
++, f1
= f1
->next
, a1
= a1
->next
)
3412 qsort (p
, n
, sizeof (argpair
), pair_cmp
);
3414 for (i
= 0; i
< n
; i
++)
3417 || p
[i
].a
->expr
->expr_type
!= EXPR_VARIABLE
3418 || p
[i
].a
->expr
->ts
.type
== BT_PROCEDURE
)
3420 f1_intent
= p
[i
].f
->sym
->attr
.intent
;
3421 for (j
= i
+ 1; j
< n
; j
++)
3423 /* Expected order after the sort. */
3424 if (!p
[j
].a
->expr
|| p
[j
].a
->expr
->expr_type
!= EXPR_VARIABLE
)
3425 gfc_internal_error ("check_some_aliasing(): corrupted data");
3427 /* Are the expression the same? */
3428 if (!compare_actual_expr (p
[i
].a
->expr
, p
[j
].a
->expr
))
3430 f2_intent
= p
[j
].f
->sym
->attr
.intent
;
3431 if ((f1_intent
== INTENT_IN
&& f2_intent
== INTENT_OUT
)
3432 || (f1_intent
== INTENT_OUT
&& f2_intent
== INTENT_IN
)
3433 || (f1_intent
== INTENT_OUT
&& f2_intent
== INTENT_OUT
))
3435 gfc_warning (0, "Same actual argument associated with INTENT(%s) "
3436 "argument %qs and INTENT(%s) argument %qs at %L",
3437 gfc_intent_string (f1_intent
), p
[i
].f
->sym
->name
,
3438 gfc_intent_string (f2_intent
), p
[j
].f
->sym
->name
,
3439 &p
[i
].a
->expr
->where
);
3449 /* Given formal and actual argument lists that correspond to one
3450 another, check that they are compatible in the sense that intents
3451 are not mismatched. */
3454 check_intents (gfc_formal_arglist
*f
, gfc_actual_arglist
*a
)
3456 sym_intent f_intent
;
3458 for (;; f
= f
->next
, a
= a
->next
)
3462 if (f
== NULL
&& a
== NULL
)
3464 if (f
== NULL
|| a
== NULL
)
3465 gfc_internal_error ("check_intents(): List mismatch");
3467 if (a
->expr
&& a
->expr
->expr_type
== EXPR_FUNCTION
3468 && a
->expr
->value
.function
.isym
3469 && a
->expr
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
3470 expr
= a
->expr
->value
.function
.actual
->expr
;
3474 if (expr
== NULL
|| expr
->expr_type
!= EXPR_VARIABLE
)
3477 f_intent
= f
->sym
->attr
.intent
;
3479 if (gfc_pure (NULL
) && gfc_impure_variable (expr
->symtree
->n
.sym
))
3481 if ((f
->sym
->ts
.type
== BT_CLASS
&& f
->sym
->attr
.class_ok
3482 && CLASS_DATA (f
->sym
)->attr
.class_pointer
)
3483 || (f
->sym
->ts
.type
!= BT_CLASS
&& f
->sym
->attr
.pointer
))
3485 gfc_error ("Procedure argument at %L is local to a PURE "
3486 "procedure and has the POINTER attribute",
3492 /* Fortran 2008, C1283. */
3493 if (gfc_pure (NULL
) && gfc_is_coindexed (expr
))
3495 if (f_intent
== INTENT_INOUT
|| f_intent
== INTENT_OUT
)
3497 gfc_error ("Coindexed actual argument at %L in PURE procedure "
3498 "is passed to an INTENT(%s) argument",
3499 &expr
->where
, gfc_intent_string (f_intent
));
3503 if ((f
->sym
->ts
.type
== BT_CLASS
&& f
->sym
->attr
.class_ok
3504 && CLASS_DATA (f
->sym
)->attr
.class_pointer
)
3505 || (f
->sym
->ts
.type
!= BT_CLASS
&& f
->sym
->attr
.pointer
))
3507 gfc_error ("Coindexed actual argument at %L in PURE procedure "
3508 "is passed to a POINTER dummy argument",
3514 /* F2008, Section 12.5.2.4. */
3515 if (expr
->ts
.type
== BT_CLASS
&& f
->sym
->ts
.type
== BT_CLASS
3516 && gfc_is_coindexed (expr
))
3518 gfc_error ("Coindexed polymorphic actual argument at %L is passed "
3519 "polymorphic dummy argument %qs",
3520 &expr
->where
, f
->sym
->name
);
3529 /* Check how a procedure is used against its interface. If all goes
3530 well, the actual argument list will also end up being properly
3534 gfc_procedure_use (gfc_symbol
*sym
, gfc_actual_arglist
**ap
, locus
*where
)
3536 gfc_formal_arglist
*dummy_args
;
3538 /* Warn about calls with an implicit interface. Special case
3539 for calling a ISO_C_BINDING because c_loc and c_funloc
3540 are pseudo-unknown. Additionally, warn about procedures not
3541 explicitly declared at all if requested. */
3542 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
&& !sym
->attr
.is_iso_c
)
3544 if (sym
->ns
->has_implicit_none_export
&& sym
->attr
.proc
== PROC_UNKNOWN
)
3546 gfc_error ("Procedure %qs called at %L is not explicitly declared",
3550 if (warn_implicit_interface
)
3551 gfc_warning (OPT_Wimplicit_interface
,
3552 "Procedure %qs called with an implicit interface at %L",
3554 else if (warn_implicit_procedure
&& sym
->attr
.proc
== PROC_UNKNOWN
)
3555 gfc_warning (OPT_Wimplicit_procedure
,
3556 "Procedure %qs called at %L is not explicitly declared",
3560 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
)
3562 gfc_actual_arglist
*a
;
3564 if (sym
->attr
.pointer
)
3566 gfc_error ("The pointer object %qs at %L must have an explicit "
3567 "function interface or be declared as array",
3572 if (sym
->attr
.allocatable
&& !sym
->attr
.external
)
3574 gfc_error ("The allocatable object %qs at %L must have an explicit "
3575 "function interface or be declared as array",
3580 if (sym
->attr
.allocatable
)
3582 gfc_error ("Allocatable function %qs at %L must have an explicit "
3583 "function interface", sym
->name
, where
);
3587 for (a
= *ap
; a
; a
= a
->next
)
3589 /* Skip g77 keyword extensions like %VAL, %REF, %LOC. */
3590 if (a
->name
!= NULL
&& a
->name
[0] != '%')
3592 gfc_error ("Keyword argument requires explicit interface "
3593 "for procedure %qs at %L", sym
->name
, &a
->expr
->where
);
3597 /* TS 29113, 6.2. */
3598 if (a
->expr
&& a
->expr
->ts
.type
== BT_ASSUMED
3599 && sym
->intmod_sym_id
!= ISOCBINDING_LOC
)
3601 gfc_error ("Assumed-type argument %s at %L requires an explicit "
3602 "interface", a
->expr
->symtree
->n
.sym
->name
,
3607 /* F2008, C1303 and C1304. */
3609 && (a
->expr
->ts
.type
== BT_DERIVED
|| a
->expr
->ts
.type
== BT_CLASS
)
3610 && ((a
->expr
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
3611 && a
->expr
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
3612 || gfc_expr_attr (a
->expr
).lock_comp
))
3614 gfc_error ("Actual argument of LOCK_TYPE or with LOCK_TYPE "
3615 "component at %L requires an explicit interface for "
3616 "procedure %qs", &a
->expr
->where
, sym
->name
);
3621 && (a
->expr
->ts
.type
== BT_DERIVED
|| a
->expr
->ts
.type
== BT_CLASS
)
3622 && ((a
->expr
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
3623 && a
->expr
->ts
.u
.derived
->intmod_sym_id
3624 == ISOFORTRAN_EVENT_TYPE
)
3625 || gfc_expr_attr (a
->expr
).event_comp
))
3627 gfc_error ("Actual argument of EVENT_TYPE or with EVENT_TYPE "
3628 "component at %L requires an explicit interface for "
3629 "procedure %qs", &a
->expr
->where
, sym
->name
);
3633 if (a
->expr
&& a
->expr
->expr_type
== EXPR_NULL
3634 && a
->expr
->ts
.type
== BT_UNKNOWN
)
3636 gfc_error ("MOLD argument to NULL required at %L", &a
->expr
->where
);
3640 /* TS 29113, C407b. */
3641 if (a
->expr
&& a
->expr
->expr_type
== EXPR_VARIABLE
3642 && symbol_rank (a
->expr
->symtree
->n
.sym
) == -1)
3644 gfc_error ("Assumed-rank argument requires an explicit interface "
3645 "at %L", &a
->expr
->where
);
3653 dummy_args
= gfc_sym_get_dummy_args (sym
);
3655 if (!compare_actual_formal (ap
, dummy_args
, 0, sym
->attr
.elemental
, where
))
3658 if (!check_intents (dummy_args
, *ap
))
3662 check_some_aliasing (dummy_args
, *ap
);
3668 /* Check how a procedure pointer component is used against its interface.
3669 If all goes well, the actual argument list will also end up being properly
3670 sorted. Completely analogous to gfc_procedure_use. */
3673 gfc_ppc_use (gfc_component
*comp
, gfc_actual_arglist
**ap
, locus
*where
)
3675 /* Warn about calls with an implicit interface. Special case
3676 for calling a ISO_C_BINDING because c_loc and c_funloc
3677 are pseudo-unknown. */
3678 if (warn_implicit_interface
3679 && comp
->attr
.if_source
== IFSRC_UNKNOWN
3680 && !comp
->attr
.is_iso_c
)
3681 gfc_warning (OPT_Wimplicit_interface
,
3682 "Procedure pointer component %qs called with an implicit "
3683 "interface at %L", comp
->name
, where
);
3685 if (comp
->attr
.if_source
== IFSRC_UNKNOWN
)
3687 gfc_actual_arglist
*a
;
3688 for (a
= *ap
; a
; a
= a
->next
)
3690 /* Skip g77 keyword extensions like %VAL, %REF, %LOC. */
3691 if (a
->name
!= NULL
&& a
->name
[0] != '%')
3693 gfc_error ("Keyword argument requires explicit interface "
3694 "for procedure pointer component %qs at %L",
3695 comp
->name
, &a
->expr
->where
);
3703 if (!compare_actual_formal (ap
, comp
->ts
.interface
->formal
, 0,
3704 comp
->attr
.elemental
, where
))
3707 check_intents (comp
->ts
.interface
->formal
, *ap
);
3709 check_some_aliasing (comp
->ts
.interface
->formal
, *ap
);
3713 /* Try if an actual argument list matches the formal list of a symbol,
3714 respecting the symbol's attributes like ELEMENTAL. This is used for
3715 GENERIC resolution. */
3718 gfc_arglist_matches_symbol (gfc_actual_arglist
** args
, gfc_symbol
* sym
)
3720 gfc_formal_arglist
*dummy_args
;
3723 if (sym
->attr
.flavor
!= FL_PROCEDURE
)
3726 dummy_args
= gfc_sym_get_dummy_args (sym
);
3728 r
= !sym
->attr
.elemental
;
3729 if (compare_actual_formal (args
, dummy_args
, r
, !r
, NULL
))
3731 check_intents (dummy_args
, *args
);
3733 check_some_aliasing (dummy_args
, *args
);
3741 /* Given an interface pointer and an actual argument list, search for
3742 a formal argument list that matches the actual. If found, returns
3743 a pointer to the symbol of the correct interface. Returns NULL if
3747 gfc_search_interface (gfc_interface
*intr
, int sub_flag
,
3748 gfc_actual_arglist
**ap
)
3750 gfc_symbol
*elem_sym
= NULL
;
3751 gfc_symbol
*null_sym
= NULL
;
3752 locus null_expr_loc
;
3753 gfc_actual_arglist
*a
;
3754 bool has_null_arg
= false;
3756 for (a
= *ap
; a
; a
= a
->next
)
3757 if (a
->expr
&& a
->expr
->expr_type
== EXPR_NULL
3758 && a
->expr
->ts
.type
== BT_UNKNOWN
)
3760 has_null_arg
= true;
3761 null_expr_loc
= a
->expr
->where
;
3765 for (; intr
; intr
= intr
->next
)
3767 if (gfc_fl_struct (intr
->sym
->attr
.flavor
))
3769 if (sub_flag
&& intr
->sym
->attr
.function
)
3771 if (!sub_flag
&& intr
->sym
->attr
.subroutine
)
3774 if (gfc_arglist_matches_symbol (ap
, intr
->sym
))
3776 if (has_null_arg
&& null_sym
)
3778 gfc_error ("MOLD= required in NULL() argument at %L: Ambiguity "
3779 "between specific functions %s and %s",
3780 &null_expr_loc
, null_sym
->name
, intr
->sym
->name
);
3783 else if (has_null_arg
)
3785 null_sym
= intr
->sym
;
3789 /* Satisfy 12.4.4.1 such that an elemental match has lower
3790 weight than a non-elemental match. */
3791 if (intr
->sym
->attr
.elemental
)
3793 elem_sym
= intr
->sym
;
3803 return elem_sym
? elem_sym
: NULL
;
3807 /* Do a brute force recursive search for a symbol. */
3809 static gfc_symtree
*
3810 find_symtree0 (gfc_symtree
*root
, gfc_symbol
*sym
)
3814 if (root
->n
.sym
== sym
)
3819 st
= find_symtree0 (root
->left
, sym
);
3820 if (root
->right
&& ! st
)
3821 st
= find_symtree0 (root
->right
, sym
);
3826 /* Find a symtree for a symbol. */
3829 gfc_find_sym_in_symtree (gfc_symbol
*sym
)
3834 /* First try to find it by name. */
3835 gfc_find_sym_tree (sym
->name
, gfc_current_ns
, 1, &st
);
3836 if (st
&& st
->n
.sym
== sym
)
3839 /* If it's been renamed, resort to a brute-force search. */
3840 /* TODO: avoid having to do this search. If the symbol doesn't exist
3841 in the symtree for the current namespace, it should probably be added. */
3842 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
3844 st
= find_symtree0 (ns
->sym_root
, sym
);
3848 gfc_internal_error ("Unable to find symbol %qs", sym
->name
);
3853 /* See if the arglist to an operator-call contains a derived-type argument
3854 with a matching type-bound operator. If so, return the matching specific
3855 procedure defined as operator-target as well as the base-object to use
3856 (which is the found derived-type argument with operator). The generic
3857 name, if any, is transmitted to the final expression via 'gname'. */
3859 static gfc_typebound_proc
*
3860 matching_typebound_op (gfc_expr
** tb_base
,
3861 gfc_actual_arglist
* args
,
3862 gfc_intrinsic_op op
, const char* uop
,
3863 const char ** gname
)
3865 gfc_actual_arglist
* base
;
3867 for (base
= args
; base
; base
= base
->next
)
3868 if (base
->expr
->ts
.type
== BT_DERIVED
|| base
->expr
->ts
.type
== BT_CLASS
)
3870 gfc_typebound_proc
* tb
;
3871 gfc_symbol
* derived
;
3874 while (base
->expr
->expr_type
== EXPR_OP
3875 && base
->expr
->value
.op
.op
== INTRINSIC_PARENTHESES
)
3876 base
->expr
= base
->expr
->value
.op
.op1
;
3878 if (base
->expr
->ts
.type
== BT_CLASS
)
3880 if (!base
->expr
->ts
.u
.derived
|| CLASS_DATA (base
->expr
) == NULL
3881 || !gfc_expr_attr (base
->expr
).class_ok
)
3883 derived
= CLASS_DATA (base
->expr
)->ts
.u
.derived
;
3886 derived
= base
->expr
->ts
.u
.derived
;
3888 if (op
== INTRINSIC_USER
)
3890 gfc_symtree
* tb_uop
;
3893 tb_uop
= gfc_find_typebound_user_op (derived
, &result
, uop
,
3902 tb
= gfc_find_typebound_intrinsic_op (derived
, &result
, op
,
3905 /* This means we hit a PRIVATE operator which is use-associated and
3906 should thus not be seen. */
3910 /* Look through the super-type hierarchy for a matching specific
3912 for (; tb
; tb
= tb
->overridden
)
3916 gcc_assert (tb
->is_generic
);
3917 for (g
= tb
->u
.generic
; g
; g
= g
->next
)
3920 gfc_actual_arglist
* argcopy
;
3923 gcc_assert (g
->specific
);
3924 if (g
->specific
->error
)
3927 target
= g
->specific
->u
.specific
->n
.sym
;
3929 /* Check if this arglist matches the formal. */
3930 argcopy
= gfc_copy_actual_arglist (args
);
3931 matches
= gfc_arglist_matches_symbol (&argcopy
, target
);
3932 gfc_free_actual_arglist (argcopy
);
3934 /* Return if we found a match. */
3937 *tb_base
= base
->expr
;
3938 *gname
= g
->specific_st
->name
;
3949 /* For the 'actual arglist' of an operator call and a specific typebound
3950 procedure that has been found the target of a type-bound operator, build the
3951 appropriate EXPR_COMPCALL and resolve it. We take this indirection over
3952 type-bound procedures rather than resolving type-bound operators 'directly'
3953 so that we can reuse the existing logic. */
3956 build_compcall_for_operator (gfc_expr
* e
, gfc_actual_arglist
* actual
,
3957 gfc_expr
* base
, gfc_typebound_proc
* target
,
3960 e
->expr_type
= EXPR_COMPCALL
;
3961 e
->value
.compcall
.tbp
= target
;
3962 e
->value
.compcall
.name
= gname
? gname
: "$op";
3963 e
->value
.compcall
.actual
= actual
;
3964 e
->value
.compcall
.base_object
= base
;
3965 e
->value
.compcall
.ignore_pass
= 1;
3966 e
->value
.compcall
.assign
= 0;
3967 if (e
->ts
.type
== BT_UNKNOWN
3968 && target
->function
)
3970 if (target
->is_generic
)
3971 e
->ts
= target
->u
.generic
->specific
->u
.specific
->n
.sym
->ts
;
3973 e
->ts
= target
->u
.specific
->n
.sym
->ts
;
3978 /* This subroutine is called when an expression is being resolved.
3979 The expression node in question is either a user defined operator
3980 or an intrinsic operator with arguments that aren't compatible
3981 with the operator. This subroutine builds an actual argument list
3982 corresponding to the operands, then searches for a compatible
3983 interface. If one is found, the expression node is replaced with
3984 the appropriate function call. We use the 'match' enum to specify
3985 whether a replacement has been made or not, or if an error occurred. */
3988 gfc_extend_expr (gfc_expr
*e
)
3990 gfc_actual_arglist
*actual
;
3996 gfc_typebound_proc
* tbo
;
4001 actual
= gfc_get_actual_arglist ();
4002 actual
->expr
= e
->value
.op
.op1
;
4006 if (e
->value
.op
.op2
!= NULL
)
4008 actual
->next
= gfc_get_actual_arglist ();
4009 actual
->next
->expr
= e
->value
.op
.op2
;
4012 i
= fold_unary_intrinsic (e
->value
.op
.op
);
4014 /* See if we find a matching type-bound operator. */
4015 if (i
== INTRINSIC_USER
)
4016 tbo
= matching_typebound_op (&tb_base
, actual
,
4017 i
, e
->value
.op
.uop
->name
, &gname
);
4021 #define CHECK_OS_COMPARISON(comp) \
4022 case INTRINSIC_##comp: \
4023 case INTRINSIC_##comp##_OS: \
4024 tbo = matching_typebound_op (&tb_base, actual, \
4025 INTRINSIC_##comp, NULL, &gname); \
4027 tbo = matching_typebound_op (&tb_base, actual, \
4028 INTRINSIC_##comp##_OS, NULL, &gname); \
4030 CHECK_OS_COMPARISON(EQ
)
4031 CHECK_OS_COMPARISON(NE
)
4032 CHECK_OS_COMPARISON(GT
)
4033 CHECK_OS_COMPARISON(GE
)
4034 CHECK_OS_COMPARISON(LT
)
4035 CHECK_OS_COMPARISON(LE
)
4036 #undef CHECK_OS_COMPARISON
4039 tbo
= matching_typebound_op (&tb_base
, actual
, i
, NULL
, &gname
);
4043 /* If there is a matching typebound-operator, replace the expression with
4044 a call to it and succeed. */
4047 gcc_assert (tb_base
);
4048 build_compcall_for_operator (e
, actual
, tb_base
, tbo
, gname
);
4050 if (!gfc_resolve_expr (e
))
4056 if (i
== INTRINSIC_USER
)
4058 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
4060 uop
= gfc_find_uop (e
->value
.op
.uop
->name
, ns
);
4064 sym
= gfc_search_interface (uop
->op
, 0, &actual
);
4071 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
4073 /* Due to the distinction between '==' and '.eq.' and friends, one has
4074 to check if either is defined. */
4077 #define CHECK_OS_COMPARISON(comp) \
4078 case INTRINSIC_##comp: \
4079 case INTRINSIC_##comp##_OS: \
4080 sym = gfc_search_interface (ns->op[INTRINSIC_##comp], 0, &actual); \
4082 sym = gfc_search_interface (ns->op[INTRINSIC_##comp##_OS], 0, &actual); \
4084 CHECK_OS_COMPARISON(EQ
)
4085 CHECK_OS_COMPARISON(NE
)
4086 CHECK_OS_COMPARISON(GT
)
4087 CHECK_OS_COMPARISON(GE
)
4088 CHECK_OS_COMPARISON(LT
)
4089 CHECK_OS_COMPARISON(LE
)
4090 #undef CHECK_OS_COMPARISON
4093 sym
= gfc_search_interface (ns
->op
[i
], 0, &actual
);
4101 /* TODO: Do an ambiguity-check and error if multiple matching interfaces are
4102 found rather than just taking the first one and not checking further. */
4106 /* Don't use gfc_free_actual_arglist(). */
4107 free (actual
->next
);
4112 /* Change the expression node to a function call. */
4113 e
->expr_type
= EXPR_FUNCTION
;
4114 e
->symtree
= gfc_find_sym_in_symtree (sym
);
4115 e
->value
.function
.actual
= actual
;
4116 e
->value
.function
.esym
= NULL
;
4117 e
->value
.function
.isym
= NULL
;
4118 e
->value
.function
.name
= NULL
;
4119 e
->user_operator
= 1;
4121 if (!gfc_resolve_expr (e
))
4128 /* Tries to replace an assignment code node with a subroutine call to the
4129 subroutine associated with the assignment operator. Return true if the node
4130 was replaced. On false, no error is generated. */
4133 gfc_extend_assign (gfc_code
*c
, gfc_namespace
*ns
)
4135 gfc_actual_arglist
*actual
;
4136 gfc_expr
*lhs
, *rhs
, *tb_base
;
4137 gfc_symbol
*sym
= NULL
;
4138 const char *gname
= NULL
;
4139 gfc_typebound_proc
* tbo
;
4144 /* Don't allow an intrinsic assignment to be replaced. */
4145 if (lhs
->ts
.type
!= BT_DERIVED
&& lhs
->ts
.type
!= BT_CLASS
4146 && (rhs
->rank
== 0 || rhs
->rank
== lhs
->rank
)
4147 && (lhs
->ts
.type
== rhs
->ts
.type
4148 || (gfc_numeric_ts (&lhs
->ts
) && gfc_numeric_ts (&rhs
->ts
))))
4151 actual
= gfc_get_actual_arglist ();
4154 actual
->next
= gfc_get_actual_arglist ();
4155 actual
->next
->expr
= rhs
;
4157 /* TODO: Ambiguity-check, see above for gfc_extend_expr. */
4159 /* See if we find a matching type-bound assignment. */
4160 tbo
= matching_typebound_op (&tb_base
, actual
, INTRINSIC_ASSIGN
,
4165 /* Success: Replace the expression with a type-bound call. */
4166 gcc_assert (tb_base
);
4167 c
->expr1
= gfc_get_expr ();
4168 build_compcall_for_operator (c
->expr1
, actual
, tb_base
, tbo
, gname
);
4169 c
->expr1
->value
.compcall
.assign
= 1;
4170 c
->expr1
->where
= c
->loc
;
4172 c
->op
= EXEC_COMPCALL
;
4176 /* See if we find an 'ordinary' (non-typebound) assignment procedure. */
4177 for (; ns
; ns
= ns
->parent
)
4179 sym
= gfc_search_interface (ns
->op
[INTRINSIC_ASSIGN
], 1, &actual
);
4186 /* Success: Replace the assignment with the call. */
4187 c
->op
= EXEC_ASSIGN_CALL
;
4188 c
->symtree
= gfc_find_sym_in_symtree (sym
);
4191 c
->ext
.actual
= actual
;
4195 /* Failure: No assignment procedure found. */
4196 free (actual
->next
);
4202 /* Make sure that the interface just parsed is not already present in
4203 the given interface list. Ambiguity isn't checked yet since module
4204 procedures can be present without interfaces. */
4207 gfc_check_new_interface (gfc_interface
*base
, gfc_symbol
*new_sym
, locus loc
)
4211 for (ip
= base
; ip
; ip
= ip
->next
)
4213 if (ip
->sym
== new_sym
)
4215 gfc_error ("Entity %qs at %L is already present in the interface",
4216 new_sym
->name
, &loc
);
4225 /* Add a symbol to the current interface. */
4228 gfc_add_interface (gfc_symbol
*new_sym
)
4230 gfc_interface
**head
, *intr
;
4234 switch (current_interface
.type
)
4236 case INTERFACE_NAMELESS
:
4237 case INTERFACE_ABSTRACT
:
4240 case INTERFACE_INTRINSIC_OP
:
4241 for (ns
= current_interface
.ns
; ns
; ns
= ns
->parent
)
4242 switch (current_interface
.op
)
4245 case INTRINSIC_EQ_OS
:
4246 if (!gfc_check_new_interface (ns
->op
[INTRINSIC_EQ
], new_sym
,
4248 || !gfc_check_new_interface (ns
->op
[INTRINSIC_EQ_OS
],
4249 new_sym
, gfc_current_locus
))
4254 case INTRINSIC_NE_OS
:
4255 if (!gfc_check_new_interface (ns
->op
[INTRINSIC_NE
], new_sym
,
4257 || !gfc_check_new_interface (ns
->op
[INTRINSIC_NE_OS
],
4258 new_sym
, gfc_current_locus
))
4263 case INTRINSIC_GT_OS
:
4264 if (!gfc_check_new_interface (ns
->op
[INTRINSIC_GT
],
4265 new_sym
, gfc_current_locus
)
4266 || !gfc_check_new_interface (ns
->op
[INTRINSIC_GT_OS
],
4267 new_sym
, gfc_current_locus
))
4272 case INTRINSIC_GE_OS
:
4273 if (!gfc_check_new_interface (ns
->op
[INTRINSIC_GE
],
4274 new_sym
, gfc_current_locus
)
4275 || !gfc_check_new_interface (ns
->op
[INTRINSIC_GE_OS
],
4276 new_sym
, gfc_current_locus
))
4281 case INTRINSIC_LT_OS
:
4282 if (!gfc_check_new_interface (ns
->op
[INTRINSIC_LT
],
4283 new_sym
, gfc_current_locus
)
4284 || !gfc_check_new_interface (ns
->op
[INTRINSIC_LT_OS
],
4285 new_sym
, gfc_current_locus
))
4290 case INTRINSIC_LE_OS
:
4291 if (!gfc_check_new_interface (ns
->op
[INTRINSIC_LE
],
4292 new_sym
, gfc_current_locus
)
4293 || !gfc_check_new_interface (ns
->op
[INTRINSIC_LE_OS
],
4294 new_sym
, gfc_current_locus
))
4299 if (!gfc_check_new_interface (ns
->op
[current_interface
.op
],
4300 new_sym
, gfc_current_locus
))
4304 head
= ¤t_interface
.ns
->op
[current_interface
.op
];
4307 case INTERFACE_GENERIC
:
4308 case INTERFACE_DTIO
:
4309 for (ns
= current_interface
.ns
; ns
; ns
= ns
->parent
)
4311 gfc_find_symbol (current_interface
.sym
->name
, ns
, 0, &sym
);
4315 if (!gfc_check_new_interface (sym
->generic
,
4316 new_sym
, gfc_current_locus
))
4320 head
= ¤t_interface
.sym
->generic
;
4323 case INTERFACE_USER_OP
:
4324 if (!gfc_check_new_interface (current_interface
.uop
->op
,
4325 new_sym
, gfc_current_locus
))
4328 head
= ¤t_interface
.uop
->op
;
4332 gfc_internal_error ("gfc_add_interface(): Bad interface type");
4335 intr
= gfc_get_interface ();
4336 intr
->sym
= new_sym
;
4337 intr
->where
= gfc_current_locus
;
4347 gfc_current_interface_head (void)
4349 switch (current_interface
.type
)
4351 case INTERFACE_INTRINSIC_OP
:
4352 return current_interface
.ns
->op
[current_interface
.op
];
4354 case INTERFACE_GENERIC
:
4355 case INTERFACE_DTIO
:
4356 return current_interface
.sym
->generic
;
4358 case INTERFACE_USER_OP
:
4359 return current_interface
.uop
->op
;
4368 gfc_set_current_interface_head (gfc_interface
*i
)
4370 switch (current_interface
.type
)
4372 case INTERFACE_INTRINSIC_OP
:
4373 current_interface
.ns
->op
[current_interface
.op
] = i
;
4376 case INTERFACE_GENERIC
:
4377 case INTERFACE_DTIO
:
4378 current_interface
.sym
->generic
= i
;
4381 case INTERFACE_USER_OP
:
4382 current_interface
.uop
->op
= i
;
4391 /* Gets rid of a formal argument list. We do not free symbols.
4392 Symbols are freed when a namespace is freed. */
4395 gfc_free_formal_arglist (gfc_formal_arglist
*p
)
4397 gfc_formal_arglist
*q
;
4407 /* Check that it is ok for the type-bound procedure 'proc' to override the
4408 procedure 'old', cf. F08:4.5.7.3. */
4411 gfc_check_typebound_override (gfc_symtree
* proc
, gfc_symtree
* old
)
4414 gfc_symbol
*proc_target
, *old_target
;
4415 unsigned proc_pass_arg
, old_pass_arg
, argpos
;
4416 gfc_formal_arglist
*proc_formal
, *old_formal
;
4420 /* This procedure should only be called for non-GENERIC proc. */
4421 gcc_assert (!proc
->n
.tb
->is_generic
);
4423 /* If the overwritten procedure is GENERIC, this is an error. */
4424 if (old
->n
.tb
->is_generic
)
4426 gfc_error ("Can't overwrite GENERIC %qs at %L",
4427 old
->name
, &proc
->n
.tb
->where
);
4431 where
= proc
->n
.tb
->where
;
4432 proc_target
= proc
->n
.tb
->u
.specific
->n
.sym
;
4433 old_target
= old
->n
.tb
->u
.specific
->n
.sym
;
4435 /* Check that overridden binding is not NON_OVERRIDABLE. */
4436 if (old
->n
.tb
->non_overridable
)
4438 gfc_error ("%qs at %L overrides a procedure binding declared"
4439 " NON_OVERRIDABLE", proc
->name
, &where
);
4443 /* It's an error to override a non-DEFERRED procedure with a DEFERRED one. */
4444 if (!old
->n
.tb
->deferred
&& proc
->n
.tb
->deferred
)
4446 gfc_error ("%qs at %L must not be DEFERRED as it overrides a"
4447 " non-DEFERRED binding", proc
->name
, &where
);
4451 /* If the overridden binding is PURE, the overriding must be, too. */
4452 if (old_target
->attr
.pure
&& !proc_target
->attr
.pure
)
4454 gfc_error ("%qs at %L overrides a PURE procedure and must also be PURE",
4455 proc
->name
, &where
);
4459 /* If the overridden binding is ELEMENTAL, the overriding must be, too. If it
4460 is not, the overriding must not be either. */
4461 if (old_target
->attr
.elemental
&& !proc_target
->attr
.elemental
)
4463 gfc_error ("%qs at %L overrides an ELEMENTAL procedure and must also be"
4464 " ELEMENTAL", proc
->name
, &where
);
4467 if (!old_target
->attr
.elemental
&& proc_target
->attr
.elemental
)
4469 gfc_error ("%qs at %L overrides a non-ELEMENTAL procedure and must not"
4470 " be ELEMENTAL, either", proc
->name
, &where
);
4474 /* If the overridden binding is a SUBROUTINE, the overriding must also be a
4476 if (old_target
->attr
.subroutine
&& !proc_target
->attr
.subroutine
)
4478 gfc_error ("%qs at %L overrides a SUBROUTINE and must also be a"
4479 " SUBROUTINE", proc
->name
, &where
);
4483 /* If the overridden binding is a FUNCTION, the overriding must also be a
4484 FUNCTION and have the same characteristics. */
4485 if (old_target
->attr
.function
)
4487 if (!proc_target
->attr
.function
)
4489 gfc_error ("%qs at %L overrides a FUNCTION and must also be a"
4490 " FUNCTION", proc
->name
, &where
);
4494 if (!gfc_check_result_characteristics (proc_target
, old_target
,
4497 gfc_error ("Result mismatch for the overriding procedure "
4498 "%qs at %L: %s", proc
->name
, &where
, err
);
4503 /* If the overridden binding is PUBLIC, the overriding one must not be
4505 if (old
->n
.tb
->access
== ACCESS_PUBLIC
4506 && proc
->n
.tb
->access
== ACCESS_PRIVATE
)
4508 gfc_error ("%qs at %L overrides a PUBLIC procedure and must not be"
4509 " PRIVATE", proc
->name
, &where
);
4513 /* Compare the formal argument lists of both procedures. This is also abused
4514 to find the position of the passed-object dummy arguments of both
4515 bindings as at least the overridden one might not yet be resolved and we
4516 need those positions in the check below. */
4517 proc_pass_arg
= old_pass_arg
= 0;
4518 if (!proc
->n
.tb
->nopass
&& !proc
->n
.tb
->pass_arg
)
4520 if (!old
->n
.tb
->nopass
&& !old
->n
.tb
->pass_arg
)
4523 proc_formal
= gfc_sym_get_dummy_args (proc_target
);
4524 old_formal
= gfc_sym_get_dummy_args (old_target
);
4525 for ( ; proc_formal
&& old_formal
;
4526 proc_formal
= proc_formal
->next
, old_formal
= old_formal
->next
)
4528 if (proc
->n
.tb
->pass_arg
4529 && !strcmp (proc
->n
.tb
->pass_arg
, proc_formal
->sym
->name
))
4530 proc_pass_arg
= argpos
;
4531 if (old
->n
.tb
->pass_arg
4532 && !strcmp (old
->n
.tb
->pass_arg
, old_formal
->sym
->name
))
4533 old_pass_arg
= argpos
;
4535 /* Check that the names correspond. */
4536 if (strcmp (proc_formal
->sym
->name
, old_formal
->sym
->name
))
4538 gfc_error ("Dummy argument %qs of %qs at %L should be named %qs as"
4539 " to match the corresponding argument of the overridden"
4540 " procedure", proc_formal
->sym
->name
, proc
->name
, &where
,
4541 old_formal
->sym
->name
);
4545 check_type
= proc_pass_arg
!= argpos
&& old_pass_arg
!= argpos
;
4546 if (!gfc_check_dummy_characteristics (proc_formal
->sym
, old_formal
->sym
,
4547 check_type
, err
, sizeof(err
)))
4549 gfc_error (OPT_Wargument_mismatch
,
4550 "Argument mismatch for the overriding procedure "
4551 "%qs at %L: %s", proc
->name
, &where
, err
);
4557 if (proc_formal
|| old_formal
)
4559 gfc_error ("%qs at %L must have the same number of formal arguments as"
4560 " the overridden procedure", proc
->name
, &where
);
4564 /* If the overridden binding is NOPASS, the overriding one must also be
4566 if (old
->n
.tb
->nopass
&& !proc
->n
.tb
->nopass
)
4568 gfc_error ("%qs at %L overrides a NOPASS binding and must also be"
4569 " NOPASS", proc
->name
, &where
);
4573 /* If the overridden binding is PASS(x), the overriding one must also be
4574 PASS and the passed-object dummy arguments must correspond. */
4575 if (!old
->n
.tb
->nopass
)
4577 if (proc
->n
.tb
->nopass
)
4579 gfc_error ("%qs at %L overrides a binding with PASS and must also be"
4580 " PASS", proc
->name
, &where
);
4584 if (proc_pass_arg
!= old_pass_arg
)
4586 gfc_error ("Passed-object dummy argument of %qs at %L must be at"
4587 " the same position as the passed-object dummy argument of"
4588 " the overridden procedure", proc
->name
, &where
);
4597 /* The following three functions check that the formal arguments
4598 of user defined derived type IO procedures are compliant with
4599 the requirements of the standard. */
4602 check_dtio_arg_TKR_intent (gfc_symbol
*fsym
, bool typebound
, bt type
,
4603 int kind
, int rank
, sym_intent intent
)
4605 if (fsym
->ts
.type
!= type
)
4607 gfc_error ("DTIO dummy argument at %L must be of type %s",
4608 &fsym
->declared_at
, gfc_basic_typename (type
));
4612 if (fsym
->ts
.type
!= BT_CLASS
&& fsym
->ts
.type
!= BT_DERIVED
4613 && fsym
->ts
.kind
!= kind
)
4614 gfc_error ("DTIO dummy argument at %L must be of KIND = %d",
4615 &fsym
->declared_at
, kind
);
4619 && (((type
== BT_CLASS
) && CLASS_DATA (fsym
)->attr
.dimension
)
4620 || ((type
!= BT_CLASS
) && fsym
->attr
.dimension
)))
4621 gfc_error ("DTIO dummy argument at %L be a scalar",
4622 &fsym
->declared_at
);
4624 && (fsym
->as
== NULL
|| fsym
->as
->type
!= AS_ASSUMED_SHAPE
))
4625 gfc_error ("DTIO dummy argument at %L must be an "
4626 "ASSUMED SHAPE ARRAY", &fsym
->declared_at
);
4628 if (fsym
->attr
.intent
!= intent
)
4629 gfc_error ("DTIO dummy argument at %L must have intent %s",
4630 &fsym
->declared_at
, gfc_code2string (intents
, (int)intent
));
4636 check_dtio_interface1 (gfc_symbol
*derived
, gfc_symtree
*tb_io_st
,
4637 bool typebound
, bool formatted
, int code
)
4639 gfc_symbol
*dtio_sub
, *generic_proc
, *fsym
;
4640 gfc_typebound_proc
*tb_io_proc
, *specific_proc
;
4641 gfc_interface
*intr
;
4642 gfc_formal_arglist
*formal
;
4645 bool read
= ((dtio_codes
)code
== DTIO_RF
)
4646 || ((dtio_codes
)code
== DTIO_RUF
);
4654 /* Typebound DTIO binding. */
4655 tb_io_proc
= tb_io_st
->n
.tb
;
4656 if (tb_io_proc
== NULL
)
4659 gcc_assert (tb_io_proc
->is_generic
);
4660 gcc_assert (tb_io_proc
->u
.generic
->next
== NULL
);
4662 specific_proc
= tb_io_proc
->u
.generic
->specific
;
4663 if (specific_proc
== NULL
|| specific_proc
->is_generic
)
4666 dtio_sub
= specific_proc
->u
.specific
->n
.sym
;
4670 generic_proc
= tb_io_st
->n
.sym
;
4671 if (generic_proc
== NULL
|| generic_proc
->generic
== NULL
)
4674 for (intr
= tb_io_st
->n
.sym
->generic
; intr
; intr
= intr
->next
)
4676 if (intr
->sym
&& intr
->sym
->formal
&& intr
->sym
->formal
->sym
4677 && ((intr
->sym
->formal
->sym
->ts
.type
== BT_CLASS
4678 && CLASS_DATA (intr
->sym
->formal
->sym
)->ts
.u
.derived
4680 || (intr
->sym
->formal
->sym
->ts
.type
== BT_DERIVED
4681 && intr
->sym
->formal
->sym
->ts
.u
.derived
== derived
)))
4683 dtio_sub
= intr
->sym
;
4686 else if (intr
->sym
&& intr
->sym
->formal
&& !intr
->sym
->formal
->sym
)
4688 gfc_error ("Alternate return at %L is not permitted in a DTIO "
4689 "procedure", &intr
->sym
->declared_at
);
4694 if (dtio_sub
== NULL
)
4698 gcc_assert (dtio_sub
);
4699 if (!dtio_sub
->attr
.subroutine
)
4700 gfc_error ("DTIO procedure '%s' at %L must be a subroutine",
4701 dtio_sub
->name
, &dtio_sub
->declared_at
);
4704 for (formal
= dtio_sub
->formal
; formal
; formal
= formal
->next
)
4707 if (arg_num
< (formatted
? 6 : 4))
4709 gfc_error ("Too few dummy arguments in DTIO procedure '%s' at %L",
4710 dtio_sub
->name
, &dtio_sub
->declared_at
);
4714 if (arg_num
> (formatted
? 6 : 4))
4716 gfc_error ("Too many dummy arguments in DTIO procedure '%s' at %L",
4717 dtio_sub
->name
, &dtio_sub
->declared_at
);
4722 /* Now go through the formal arglist. */
4724 for (formal
= dtio_sub
->formal
; formal
; formal
= formal
->next
, arg_num
++)
4726 if (!formatted
&& arg_num
== 3)
4732 gfc_error ("Alternate return at %L is not permitted in a DTIO "
4733 "procedure", &dtio_sub
->declared_at
);
4740 type
= derived
->attr
.sequence
|| derived
->attr
.is_bind_c
?
4741 BT_DERIVED
: BT_CLASS
;
4743 intent
= read
? INTENT_INOUT
: INTENT_IN
;
4744 check_dtio_arg_TKR_intent (fsym
, typebound
, type
, kind
,
4750 kind
= gfc_default_integer_kind
;
4752 check_dtio_arg_TKR_intent (fsym
, typebound
, type
, kind
,
4755 case(3): /* IOTYPE */
4756 type
= BT_CHARACTER
;
4757 kind
= gfc_default_character_kind
;
4759 check_dtio_arg_TKR_intent (fsym
, typebound
, type
, kind
,
4762 case(4): /* VLIST */
4764 kind
= gfc_default_integer_kind
;
4766 check_dtio_arg_TKR_intent (fsym
, typebound
, type
, kind
,
4769 case(5): /* IOSTAT */
4771 kind
= gfc_default_integer_kind
;
4772 intent
= INTENT_OUT
;
4773 check_dtio_arg_TKR_intent (fsym
, typebound
, type
, kind
,
4776 case(6): /* IOMSG */
4777 type
= BT_CHARACTER
;
4778 kind
= gfc_default_character_kind
;
4779 intent
= INTENT_INOUT
;
4780 check_dtio_arg_TKR_intent (fsym
, typebound
, type
, kind
,
4787 derived
->attr
.has_dtio_procs
= 1;
4792 gfc_check_dtio_interfaces (gfc_symbol
*derived
)
4794 gfc_symtree
*tb_io_st
;
4799 if (derived
->attr
.is_class
== 1 || derived
->attr
.vtype
== 1)
4802 /* Check typebound DTIO bindings. */
4803 for (code
= 0; code
< 4; code
++)
4805 formatted
= ((dtio_codes
)code
== DTIO_RF
)
4806 || ((dtio_codes
)code
== DTIO_WF
);
4808 tb_io_st
= gfc_find_typebound_proc (derived
, &t
,
4809 gfc_code2string (dtio_procs
, code
),
4810 true, &derived
->declared_at
);
4811 if (tb_io_st
!= NULL
)
4812 check_dtio_interface1 (derived
, tb_io_st
, true, formatted
, code
);
4815 /* Check generic DTIO interfaces. */
4816 for (code
= 0; code
< 4; code
++)
4818 formatted
= ((dtio_codes
)code
== DTIO_RF
)
4819 || ((dtio_codes
)code
== DTIO_WF
);
4821 tb_io_st
= gfc_find_symtree (derived
->ns
->sym_root
,
4822 gfc_code2string (dtio_procs
, code
));
4823 if (tb_io_st
!= NULL
)
4824 check_dtio_interface1 (derived
, tb_io_st
, false, formatted
, code
);
4830 gfc_find_specific_dtio_proc (gfc_symbol
*derived
, bool write
, bool formatted
)
4832 gfc_symtree
*tb_io_st
= NULL
;
4833 gfc_symbol
*dtio_sub
= NULL
;
4834 gfc_symbol
*extended
;
4835 gfc_typebound_proc
*tb_io_proc
, *specific_proc
;
4838 if (!derived
|| derived
->attr
.flavor
!= FL_DERIVED
)
4841 /* Try to find a typebound DTIO binding. */
4842 if (formatted
== true)
4845 tb_io_st
= gfc_find_typebound_proc (derived
, &t
,
4846 gfc_code2string (dtio_procs
,
4849 &derived
->declared_at
);
4851 tb_io_st
= gfc_find_typebound_proc (derived
, &t
,
4852 gfc_code2string (dtio_procs
,
4855 &derived
->declared_at
);
4860 tb_io_st
= gfc_find_typebound_proc (derived
, &t
,
4861 gfc_code2string (dtio_procs
,
4864 &derived
->declared_at
);
4866 tb_io_st
= gfc_find_typebound_proc (derived
, &t
,
4867 gfc_code2string (dtio_procs
,
4870 &derived
->declared_at
);
4873 if (tb_io_st
!= NULL
)
4875 const char *genname
;
4878 tb_io_proc
= tb_io_st
->n
.tb
;
4879 gcc_assert (tb_io_proc
!= NULL
);
4880 gcc_assert (tb_io_proc
->is_generic
);
4881 gcc_assert (tb_io_proc
->u
.generic
->next
== NULL
);
4883 specific_proc
= tb_io_proc
->u
.generic
->specific
;
4884 gcc_assert (!specific_proc
->is_generic
);
4886 /* Go back and make sure that we have the right specific procedure.
4887 Here we most likely have a procedure from the parent type, which
4888 can be overridden in extensions. */
4889 genname
= tb_io_proc
->u
.generic
->specific_st
->name
;
4890 st
= gfc_find_typebound_proc (derived
, NULL
, genname
,
4891 true, &tb_io_proc
->where
);
4893 dtio_sub
= st
->n
.tb
->u
.specific
->n
.sym
;
4895 dtio_sub
= specific_proc
->u
.specific
->n
.sym
;
4898 if (tb_io_st
!= NULL
)
4901 /* If there is not a typebound binding, look for a generic
4903 for (extended
= derived
; extended
;
4904 extended
= gfc_get_derived_super_type (extended
))
4906 if (extended
== NULL
|| extended
->ns
== NULL
)
4909 if (formatted
== true)
4912 tb_io_st
= gfc_find_symtree (extended
->ns
->sym_root
,
4913 gfc_code2string (dtio_procs
,
4916 tb_io_st
= gfc_find_symtree (extended
->ns
->sym_root
,
4917 gfc_code2string (dtio_procs
,
4923 tb_io_st
= gfc_find_symtree (extended
->ns
->sym_root
,
4924 gfc_code2string (dtio_procs
,
4927 tb_io_st
= gfc_find_symtree (extended
->ns
->sym_root
,
4928 gfc_code2string (dtio_procs
,
4932 if (tb_io_st
!= NULL
4934 && tb_io_st
->n
.sym
->generic
)
4936 for (gfc_interface
*intr
= tb_io_st
->n
.sym
->generic
;
4937 intr
&& intr
->sym
&& intr
->sym
->formal
;
4940 gfc_symbol
*fsym
= intr
->sym
->formal
->sym
;
4941 if ((fsym
->ts
.type
== BT_CLASS
4942 && CLASS_DATA (fsym
)->ts
.u
.derived
== extended
)
4943 || (fsym
->ts
.type
== BT_DERIVED
4944 && fsym
->ts
.u
.derived
== extended
))
4946 dtio_sub
= intr
->sym
;
4954 if (dtio_sub
&& derived
!= CLASS_DATA (dtio_sub
->formal
->sym
)->ts
.u
.derived
)
4955 gfc_find_derived_vtab (derived
);