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. */
1733 /* Check existence. */
1734 if (f1
== NULL
&& f2
== NULL
)
1736 if (f1
== NULL
|| f2
== NULL
)
1739 snprintf (errmsg
, err_len
, "'%s' has the wrong number of "
1740 "arguments", name2
);
1744 if (UNLIMITED_POLY (f1
->sym
))
1749 /* Check all characteristics. */
1750 if (!gfc_check_dummy_characteristics (f1
->sym
, f2
->sym
, true,
1756 /* Only check type and rank. */
1757 if (!compare_type (f2
->sym
, f1
->sym
))
1760 snprintf (errmsg
, err_len
, "Type mismatch in argument '%s' "
1761 "(%s/%s)", f1
->sym
->name
,
1762 gfc_typename (&f1
->sym
->ts
),
1763 gfc_typename (&f2
->sym
->ts
));
1766 if (!compare_rank (f2
->sym
, f1
->sym
))
1769 snprintf (errmsg
, err_len
, "Rank mismatch in argument '%s' "
1770 "(%i/%i)", f1
->sym
->name
, symbol_rank (f1
->sym
),
1771 symbol_rank (f2
->sym
));
1784 /* Given a pointer to an interface pointer, remove duplicate
1785 interfaces and make sure that all symbols are either functions
1786 or subroutines, and all of the same kind. Returns nonzero if
1787 something goes wrong. */
1790 check_interface0 (gfc_interface
*p
, const char *interface_name
)
1792 gfc_interface
*psave
, *q
, *qlast
;
1795 for (; p
; p
= p
->next
)
1797 /* Make sure all symbols in the interface have been defined as
1798 functions or subroutines. */
1799 if (((!p
->sym
->attr
.function
&& !p
->sym
->attr
.subroutine
)
1800 || !p
->sym
->attr
.if_source
)
1801 && !gfc_fl_struct (p
->sym
->attr
.flavor
))
1803 if (p
->sym
->attr
.external
)
1804 gfc_error ("Procedure %qs in %s at %L has no explicit interface",
1805 p
->sym
->name
, interface_name
, &p
->sym
->declared_at
);
1807 gfc_error ("Procedure %qs in %s at %L is neither function nor "
1808 "subroutine", p
->sym
->name
, interface_name
,
1809 &p
->sym
->declared_at
);
1813 /* Verify that procedures are either all SUBROUTINEs or all FUNCTIONs. */
1814 if ((psave
->sym
->attr
.function
&& !p
->sym
->attr
.function
1815 && !gfc_fl_struct (p
->sym
->attr
.flavor
))
1816 || (psave
->sym
->attr
.subroutine
&& !p
->sym
->attr
.subroutine
))
1818 if (!gfc_fl_struct (p
->sym
->attr
.flavor
))
1819 gfc_error ("In %s at %L procedures must be either all SUBROUTINEs"
1820 " or all FUNCTIONs", interface_name
,
1821 &p
->sym
->declared_at
);
1822 else if (p
->sym
->attr
.flavor
== FL_DERIVED
)
1823 gfc_error ("In %s at %L procedures must be all FUNCTIONs as the "
1824 "generic name is also the name of a derived type",
1825 interface_name
, &p
->sym
->declared_at
);
1829 /* F2003, C1207. F2008, C1207. */
1830 if (p
->sym
->attr
.proc
== PROC_INTERNAL
1831 && !gfc_notify_std (GFC_STD_F2008
, "Internal procedure "
1832 "%qs in %s at %L", p
->sym
->name
,
1833 interface_name
, &p
->sym
->declared_at
))
1838 /* Remove duplicate interfaces in this interface list. */
1839 for (; p
; p
= p
->next
)
1843 for (q
= p
->next
; q
;)
1845 if (p
->sym
!= q
->sym
)
1852 /* Duplicate interface. */
1853 qlast
->next
= q
->next
;
1864 /* Check lists of interfaces to make sure that no two interfaces are
1865 ambiguous. Duplicate interfaces (from the same symbol) are OK here. */
1868 check_interface1 (gfc_interface
*p
, gfc_interface
*q0
,
1869 int generic_flag
, const char *interface_name
,
1873 for (; p
; p
= p
->next
)
1874 for (q
= q0
; q
; q
= q
->next
)
1876 if (p
->sym
== q
->sym
)
1877 continue; /* Duplicates OK here. */
1879 if (p
->sym
->name
== q
->sym
->name
&& p
->sym
->module
== q
->sym
->module
)
1882 if (!gfc_fl_struct (p
->sym
->attr
.flavor
)
1883 && !gfc_fl_struct (q
->sym
->attr
.flavor
)
1884 && gfc_compare_interfaces (p
->sym
, q
->sym
, q
->sym
->name
,
1885 generic_flag
, 0, NULL
, 0, NULL
, NULL
))
1888 gfc_error ("Ambiguous interfaces in %s for %qs at %L "
1889 "and %qs at %L", interface_name
,
1890 q
->sym
->name
, &q
->sym
->declared_at
,
1891 p
->sym
->name
, &p
->sym
->declared_at
);
1892 else if (!p
->sym
->attr
.use_assoc
&& q
->sym
->attr
.use_assoc
)
1893 gfc_warning (0, "Ambiguous interfaces in %s for %qs at %L "
1894 "and %qs at %L", interface_name
,
1895 q
->sym
->name
, &q
->sym
->declared_at
,
1896 p
->sym
->name
, &p
->sym
->declared_at
);
1898 gfc_warning (0, "Although not referenced, %qs has ambiguous "
1899 "interfaces at %L", interface_name
, &p
->where
);
1907 /* Check the generic and operator interfaces of symbols to make sure
1908 that none of the interfaces conflict. The check has to be done
1909 after all of the symbols are actually loaded. */
1912 check_sym_interfaces (gfc_symbol
*sym
)
1914 char interface_name
[100];
1917 if (sym
->ns
!= gfc_current_ns
)
1920 if (sym
->generic
!= NULL
)
1922 sprintf (interface_name
, "generic interface '%s'", sym
->name
);
1923 if (check_interface0 (sym
->generic
, interface_name
))
1926 for (p
= sym
->generic
; p
; p
= p
->next
)
1928 if (p
->sym
->attr
.mod_proc
1929 && !p
->sym
->attr
.module_procedure
1930 && (p
->sym
->attr
.if_source
!= IFSRC_DECL
1931 || p
->sym
->attr
.procedure
))
1933 gfc_error ("%qs at %L is not a module procedure",
1934 p
->sym
->name
, &p
->where
);
1939 /* Originally, this test was applied to host interfaces too;
1940 this is incorrect since host associated symbols, from any
1941 source, cannot be ambiguous with local symbols. */
1942 check_interface1 (sym
->generic
, sym
->generic
, 1, interface_name
,
1943 sym
->attr
.referenced
|| !sym
->attr
.use_assoc
);
1949 check_uop_interfaces (gfc_user_op
*uop
)
1951 char interface_name
[100];
1955 sprintf (interface_name
, "operator interface '%s'", uop
->name
);
1956 if (check_interface0 (uop
->op
, interface_name
))
1959 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
1961 uop2
= gfc_find_uop (uop
->name
, ns
);
1965 check_interface1 (uop
->op
, uop2
->op
, 0,
1966 interface_name
, true);
1970 /* Given an intrinsic op, return an equivalent op if one exists,
1971 or INTRINSIC_NONE otherwise. */
1974 gfc_equivalent_op (gfc_intrinsic_op op
)
1979 return INTRINSIC_EQ_OS
;
1981 case INTRINSIC_EQ_OS
:
1982 return INTRINSIC_EQ
;
1985 return INTRINSIC_NE_OS
;
1987 case INTRINSIC_NE_OS
:
1988 return INTRINSIC_NE
;
1991 return INTRINSIC_GT_OS
;
1993 case INTRINSIC_GT_OS
:
1994 return INTRINSIC_GT
;
1997 return INTRINSIC_GE_OS
;
1999 case INTRINSIC_GE_OS
:
2000 return INTRINSIC_GE
;
2003 return INTRINSIC_LT_OS
;
2005 case INTRINSIC_LT_OS
:
2006 return INTRINSIC_LT
;
2009 return INTRINSIC_LE_OS
;
2011 case INTRINSIC_LE_OS
:
2012 return INTRINSIC_LE
;
2015 return INTRINSIC_NONE
;
2019 /* For the namespace, check generic, user operator and intrinsic
2020 operator interfaces for consistency and to remove duplicate
2021 interfaces. We traverse the whole namespace, counting on the fact
2022 that most symbols will not have generic or operator interfaces. */
2025 gfc_check_interfaces (gfc_namespace
*ns
)
2027 gfc_namespace
*old_ns
, *ns2
;
2028 char interface_name
[100];
2031 old_ns
= gfc_current_ns
;
2032 gfc_current_ns
= ns
;
2034 gfc_traverse_ns (ns
, check_sym_interfaces
);
2036 gfc_traverse_user_op (ns
, check_uop_interfaces
);
2038 for (i
= GFC_INTRINSIC_BEGIN
; i
!= GFC_INTRINSIC_END
; i
++)
2040 if (i
== INTRINSIC_USER
)
2043 if (i
== INTRINSIC_ASSIGN
)
2044 strcpy (interface_name
, "intrinsic assignment operator");
2046 sprintf (interface_name
, "intrinsic '%s' operator",
2047 gfc_op2string ((gfc_intrinsic_op
) i
));
2049 if (check_interface0 (ns
->op
[i
], interface_name
))
2053 gfc_check_operator_interface (ns
->op
[i
]->sym
, (gfc_intrinsic_op
) i
,
2056 for (ns2
= ns
; ns2
; ns2
= ns2
->parent
)
2058 gfc_intrinsic_op other_op
;
2060 if (check_interface1 (ns
->op
[i
], ns2
->op
[i
], 0,
2061 interface_name
, true))
2064 /* i should be gfc_intrinsic_op, but has to be int with this cast
2065 here for stupid C++ compatibility rules. */
2066 other_op
= gfc_equivalent_op ((gfc_intrinsic_op
) i
);
2067 if (other_op
!= INTRINSIC_NONE
2068 && check_interface1 (ns
->op
[i
], ns2
->op
[other_op
],
2069 0, interface_name
, true))
2075 gfc_current_ns
= old_ns
;
2079 /* Given a symbol of a formal argument list and an expression, if the
2080 formal argument is allocatable, check that the actual argument is
2081 allocatable. Returns nonzero if compatible, zero if not compatible. */
2084 compare_allocatable (gfc_symbol
*formal
, gfc_expr
*actual
)
2086 symbol_attribute attr
;
2088 if (formal
->attr
.allocatable
2089 || (formal
->ts
.type
== BT_CLASS
&& CLASS_DATA (formal
)->attr
.allocatable
))
2091 attr
= gfc_expr_attr (actual
);
2092 if (!attr
.allocatable
)
2100 /* Given a symbol of a formal argument list and an expression, if the
2101 formal argument is a pointer, see if the actual argument is a
2102 pointer. Returns nonzero if compatible, zero if not compatible. */
2105 compare_pointer (gfc_symbol
*formal
, gfc_expr
*actual
)
2107 symbol_attribute attr
;
2109 if (formal
->attr
.pointer
2110 || (formal
->ts
.type
== BT_CLASS
&& CLASS_DATA (formal
)
2111 && CLASS_DATA (formal
)->attr
.class_pointer
))
2113 attr
= gfc_expr_attr (actual
);
2115 /* Fortran 2008 allows non-pointer actual arguments. */
2116 if (!attr
.pointer
&& attr
.target
&& formal
->attr
.intent
== INTENT_IN
)
2127 /* Emit clear error messages for rank mismatch. */
2130 argument_rank_mismatch (const char *name
, locus
*where
,
2131 int rank1
, int rank2
)
2134 /* TS 29113, C407b. */
2137 gfc_error ("The assumed-rank array at %L requires that the dummy argument"
2138 " %qs has assumed-rank", where
, name
);
2140 else if (rank1
== 0)
2142 gfc_error ("Rank mismatch in argument %qs at %L "
2143 "(scalar and rank-%d)", name
, where
, rank2
);
2145 else if (rank2
== 0)
2147 gfc_error ("Rank mismatch in argument %qs at %L "
2148 "(rank-%d and scalar)", name
, where
, rank1
);
2152 gfc_error ("Rank mismatch in argument %qs at %L "
2153 "(rank-%d and rank-%d)", name
, where
, rank1
, rank2
);
2158 /* Given a symbol of a formal argument list and an expression, see if
2159 the two are compatible as arguments. Returns nonzero if
2160 compatible, zero if not compatible. */
2163 compare_parameter (gfc_symbol
*formal
, gfc_expr
*actual
,
2164 int ranks_must_agree
, int is_elemental
, locus
*where
)
2167 bool rank_check
, is_pointer
;
2171 /* If the formal arg has type BT_VOID, it's to one of the iso_c_binding
2172 procs c_f_pointer or c_f_procpointer, and we need to accept most
2173 pointers the user could give us. This should allow that. */
2174 if (formal
->ts
.type
== BT_VOID
)
2177 if (formal
->ts
.type
== BT_DERIVED
2178 && formal
->ts
.u
.derived
&& formal
->ts
.u
.derived
->ts
.is_iso_c
2179 && actual
->ts
.type
== BT_DERIVED
2180 && actual
->ts
.u
.derived
&& actual
->ts
.u
.derived
->ts
.is_iso_c
)
2183 if (formal
->ts
.type
== BT_CLASS
&& actual
->ts
.type
== BT_DERIVED
)
2184 /* Make sure the vtab symbol is present when
2185 the module variables are generated. */
2186 gfc_find_derived_vtab (actual
->ts
.u
.derived
);
2188 if (actual
->ts
.type
== BT_PROCEDURE
)
2190 gfc_symbol
*act_sym
= actual
->symtree
->n
.sym
;
2192 if (formal
->attr
.flavor
!= FL_PROCEDURE
)
2195 gfc_error ("Invalid procedure argument at %L", &actual
->where
);
2199 if (!gfc_compare_interfaces (formal
, act_sym
, act_sym
->name
, 0, 1, err
,
2200 sizeof(err
), NULL
, NULL
))
2203 gfc_error ("Interface mismatch in dummy procedure %qs at %L: %s",
2204 formal
->name
, &actual
->where
, err
);
2208 if (formal
->attr
.function
&& !act_sym
->attr
.function
)
2210 gfc_add_function (&act_sym
->attr
, act_sym
->name
,
2211 &act_sym
->declared_at
);
2212 if (act_sym
->ts
.type
== BT_UNKNOWN
2213 && !gfc_set_default_type (act_sym
, 1, act_sym
->ns
))
2216 else if (formal
->attr
.subroutine
&& !act_sym
->attr
.subroutine
)
2217 gfc_add_subroutine (&act_sym
->attr
, act_sym
->name
,
2218 &act_sym
->declared_at
);
2223 ppc
= gfc_get_proc_ptr_comp (actual
);
2224 if (ppc
&& ppc
->ts
.interface
)
2226 if (!gfc_compare_interfaces (formal
, ppc
->ts
.interface
, ppc
->name
, 0, 1,
2227 err
, sizeof(err
), NULL
, NULL
))
2230 gfc_error ("Interface mismatch in dummy procedure %qs at %L: %s",
2231 formal
->name
, &actual
->where
, err
);
2237 if (formal
->attr
.pointer
&& formal
->attr
.contiguous
2238 && !gfc_is_simply_contiguous (actual
, true, false))
2241 gfc_error ("Actual argument to contiguous pointer dummy %qs at %L "
2242 "must be simply contiguous", formal
->name
, &actual
->where
);
2246 if ((actual
->expr_type
!= EXPR_NULL
|| actual
->ts
.type
!= BT_UNKNOWN
)
2247 && actual
->ts
.type
!= BT_HOLLERITH
2248 && formal
->ts
.type
!= BT_ASSUMED
2249 && !(formal
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
2250 && !gfc_compare_types (&formal
->ts
, &actual
->ts
)
2251 && !(formal
->ts
.type
== BT_DERIVED
&& actual
->ts
.type
== BT_CLASS
2252 && gfc_compare_derived_types (formal
->ts
.u
.derived
,
2253 CLASS_DATA (actual
)->ts
.u
.derived
)))
2256 gfc_error ("Type mismatch in argument %qs at %L; passed %s to %s",
2257 formal
->name
, where
, gfc_typename (&actual
->ts
),
2258 gfc_typename (&formal
->ts
));
2262 if (actual
->ts
.type
== BT_ASSUMED
&& formal
->ts
.type
!= BT_ASSUMED
)
2265 gfc_error ("Assumed-type actual argument at %L requires that dummy "
2266 "argument %qs is of assumed type", &actual
->where
,
2271 /* F2008, 12.5.2.5; IR F08/0073. */
2272 if (formal
->ts
.type
== BT_CLASS
&& formal
->attr
.class_ok
2273 && actual
->expr_type
!= EXPR_NULL
2274 && ((CLASS_DATA (formal
)->attr
.class_pointer
2275 && formal
->attr
.intent
!= INTENT_IN
)
2276 || CLASS_DATA (formal
)->attr
.allocatable
))
2278 if (actual
->ts
.type
!= BT_CLASS
)
2281 gfc_error ("Actual argument to %qs at %L must be polymorphic",
2282 formal
->name
, &actual
->where
);
2286 if (!gfc_expr_attr (actual
).class_ok
)
2289 if ((!UNLIMITED_POLY (formal
) || !UNLIMITED_POLY(actual
))
2290 && !gfc_compare_derived_types (CLASS_DATA (actual
)->ts
.u
.derived
,
2291 CLASS_DATA (formal
)->ts
.u
.derived
))
2294 gfc_error ("Actual argument to %qs at %L must have the same "
2295 "declared type", formal
->name
, &actual
->where
);
2300 /* F08: 12.5.2.5 Allocatable and pointer dummy variables. However, this
2301 is necessary also for F03, so retain error for both.
2302 NOTE: Other type/kind errors pre-empt this error. Since they are F03
2303 compatible, no attempt has been made to channel to this one. */
2304 if (UNLIMITED_POLY (formal
) && !UNLIMITED_POLY (actual
)
2305 && (CLASS_DATA (formal
)->attr
.allocatable
2306 ||CLASS_DATA (formal
)->attr
.class_pointer
))
2309 gfc_error ("Actual argument to %qs at %L must be unlimited "
2310 "polymorphic since the formal argument is a "
2311 "pointer or allocatable unlimited polymorphic "
2312 "entity [F2008: 12.5.2.5]", formal
->name
,
2317 if (formal
->attr
.codimension
&& !gfc_is_coarray (actual
))
2320 gfc_error ("Actual argument to %qs at %L must be a coarray",
2321 formal
->name
, &actual
->where
);
2325 if (formal
->attr
.codimension
&& formal
->attr
.allocatable
)
2327 gfc_ref
*last
= NULL
;
2329 for (ref
= actual
->ref
; ref
; ref
= ref
->next
)
2330 if (ref
->type
== REF_COMPONENT
)
2333 /* F2008, 12.5.2.6. */
2334 if ((last
&& last
->u
.c
.component
->as
->corank
!= formal
->as
->corank
)
2336 && actual
->symtree
->n
.sym
->as
->corank
!= formal
->as
->corank
))
2339 gfc_error ("Corank mismatch in argument %qs at %L (%d and %d)",
2340 formal
->name
, &actual
->where
, formal
->as
->corank
,
2341 last
? last
->u
.c
.component
->as
->corank
2342 : actual
->symtree
->n
.sym
->as
->corank
);
2347 if (formal
->attr
.codimension
)
2349 /* F2008, 12.5.2.8 + Corrig 2 (IR F08/0048). */
2350 /* F2015, 12.5.2.8. */
2351 if (formal
->attr
.dimension
2352 && (formal
->attr
.contiguous
|| formal
->as
->type
!= AS_ASSUMED_SHAPE
)
2353 && gfc_expr_attr (actual
).dimension
2354 && !gfc_is_simply_contiguous (actual
, true, true))
2357 gfc_error ("Actual argument to %qs at %L must be simply "
2358 "contiguous or an element of such an array",
2359 formal
->name
, &actual
->where
);
2363 /* F2008, C1303 and C1304. */
2364 if (formal
->attr
.intent
!= INTENT_INOUT
2365 && (((formal
->ts
.type
== BT_DERIVED
|| formal
->ts
.type
== BT_CLASS
)
2366 && formal
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
2367 && formal
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
2368 || formal
->attr
.lock_comp
))
2372 gfc_error ("Actual argument to non-INTENT(INOUT) dummy %qs at %L, "
2373 "which is LOCK_TYPE or has a LOCK_TYPE component",
2374 formal
->name
, &actual
->where
);
2378 /* TS18508, C702/C703. */
2379 if (formal
->attr
.intent
!= INTENT_INOUT
2380 && (((formal
->ts
.type
== BT_DERIVED
|| formal
->ts
.type
== BT_CLASS
)
2381 && formal
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
2382 && formal
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
2383 || formal
->attr
.event_comp
))
2387 gfc_error ("Actual argument to non-INTENT(INOUT) dummy %qs at %L, "
2388 "which is EVENT_TYPE or has a EVENT_TYPE component",
2389 formal
->name
, &actual
->where
);
2394 /* F2008, C1239/C1240. */
2395 if (actual
->expr_type
== EXPR_VARIABLE
2396 && (actual
->symtree
->n
.sym
->attr
.asynchronous
2397 || actual
->symtree
->n
.sym
->attr
.volatile_
)
2398 && (formal
->attr
.asynchronous
|| formal
->attr
.volatile_
)
2399 && actual
->rank
&& formal
->as
2400 && !gfc_is_simply_contiguous (actual
, true, false)
2401 && ((formal
->as
->type
!= AS_ASSUMED_SHAPE
2402 && formal
->as
->type
!= AS_ASSUMED_RANK
&& !formal
->attr
.pointer
)
2403 || formal
->attr
.contiguous
))
2406 gfc_error ("Dummy argument %qs has to be a pointer, assumed-shape or "
2407 "assumed-rank array without CONTIGUOUS attribute - as actual"
2408 " argument at %L is not simply contiguous and both are "
2409 "ASYNCHRONOUS or VOLATILE", formal
->name
, &actual
->where
);
2413 if (formal
->attr
.allocatable
&& !formal
->attr
.codimension
2414 && gfc_expr_attr (actual
).codimension
)
2416 if (formal
->attr
.intent
== INTENT_OUT
)
2419 gfc_error ("Passing coarray at %L to allocatable, noncoarray, "
2420 "INTENT(OUT) dummy argument %qs", &actual
->where
,
2424 else if (warn_surprising
&& where
&& formal
->attr
.intent
!= INTENT_IN
)
2425 gfc_warning (OPT_Wsurprising
,
2426 "Passing coarray at %L to allocatable, noncoarray dummy "
2427 "argument %qs, which is invalid if the allocation status"
2428 " is modified", &actual
->where
, formal
->name
);
2431 /* If the rank is the same or the formal argument has assumed-rank. */
2432 if (symbol_rank (formal
) == actual
->rank
|| symbol_rank (formal
) == -1)
2435 rank_check
= where
!= NULL
&& !is_elemental
&& formal
->as
2436 && (formal
->as
->type
== AS_ASSUMED_SHAPE
2437 || formal
->as
->type
== AS_DEFERRED
)
2438 && actual
->expr_type
!= EXPR_NULL
;
2440 /* Skip rank checks for NO_ARG_CHECK. */
2441 if (formal
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
2444 /* Scalar & coindexed, see: F2008, Section 12.5.2.4. */
2445 if (rank_check
|| ranks_must_agree
2446 || (formal
->attr
.pointer
&& actual
->expr_type
!= EXPR_NULL
)
2447 || (actual
->rank
!= 0 && !(is_elemental
|| formal
->attr
.dimension
))
2448 || (actual
->rank
== 0
2449 && ((formal
->ts
.type
== BT_CLASS
2450 && CLASS_DATA (formal
)->as
->type
== AS_ASSUMED_SHAPE
)
2451 || (formal
->ts
.type
!= BT_CLASS
2452 && formal
->as
->type
== AS_ASSUMED_SHAPE
))
2453 && actual
->expr_type
!= EXPR_NULL
)
2454 || (actual
->rank
== 0 && formal
->attr
.dimension
2455 && gfc_is_coindexed (actual
)))
2458 argument_rank_mismatch (formal
->name
, &actual
->where
,
2459 symbol_rank (formal
), actual
->rank
);
2462 else if (actual
->rank
!= 0 && (is_elemental
|| formal
->attr
.dimension
))
2465 /* At this point, we are considering a scalar passed to an array. This
2466 is valid (cf. F95 12.4.1.1, F2003 12.4.1.2, and F2008 12.5.2.4),
2467 - if the actual argument is (a substring of) an element of a
2468 non-assumed-shape/non-pointer/non-polymorphic array; or
2469 - (F2003) if the actual argument is of type character of default/c_char
2472 is_pointer
= actual
->expr_type
== EXPR_VARIABLE
2473 ? actual
->symtree
->n
.sym
->attr
.pointer
: false;
2475 for (ref
= actual
->ref
; ref
; ref
= ref
->next
)
2477 if (ref
->type
== REF_COMPONENT
)
2478 is_pointer
= ref
->u
.c
.component
->attr
.pointer
;
2479 else if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.type
== AR_ELEMENT
2480 && ref
->u
.ar
.dimen
> 0
2482 || (ref
->next
->type
== REF_SUBSTRING
&& !ref
->next
->next
)))
2486 if (actual
->ts
.type
== BT_CLASS
&& actual
->expr_type
!= EXPR_NULL
)
2489 gfc_error ("Polymorphic scalar passed to array dummy argument %qs "
2490 "at %L", formal
->name
, &actual
->where
);
2494 if (actual
->expr_type
!= EXPR_NULL
&& ref
&& actual
->ts
.type
!= BT_CHARACTER
2495 && (is_pointer
|| ref
->u
.ar
.as
->type
== AS_ASSUMED_SHAPE
))
2498 gfc_error ("Element of assumed-shaped or pointer "
2499 "array passed to array dummy argument %qs at %L",
2500 formal
->name
, &actual
->where
);
2504 if (actual
->ts
.type
== BT_CHARACTER
&& actual
->expr_type
!= EXPR_NULL
2505 && (!ref
|| is_pointer
|| ref
->u
.ar
.as
->type
== AS_ASSUMED_SHAPE
))
2507 if (formal
->ts
.kind
!= 1 && (gfc_option
.allow_std
& GFC_STD_GNU
) == 0)
2510 gfc_error ("Extension: Scalar non-default-kind, non-C_CHAR-kind "
2511 "CHARACTER actual argument with array dummy argument "
2512 "%qs at %L", formal
->name
, &actual
->where
);
2516 if (where
&& (gfc_option
.allow_std
& GFC_STD_F2003
) == 0)
2518 gfc_error ("Fortran 2003: Scalar CHARACTER actual argument with "
2519 "array dummy argument %qs at %L",
2520 formal
->name
, &actual
->where
);
2523 else if ((gfc_option
.allow_std
& GFC_STD_F2003
) == 0)
2529 if (ref
== NULL
&& actual
->expr_type
!= EXPR_NULL
)
2532 argument_rank_mismatch (formal
->name
, &actual
->where
,
2533 symbol_rank (formal
), actual
->rank
);
2541 /* Returns the storage size of a symbol (formal argument) or
2542 zero if it cannot be determined. */
2544 static unsigned long
2545 get_sym_storage_size (gfc_symbol
*sym
)
2548 unsigned long strlen
, elements
;
2550 if (sym
->ts
.type
== BT_CHARACTER
)
2552 if (sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
2553 && sym
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
2554 strlen
= mpz_get_ui (sym
->ts
.u
.cl
->length
->value
.integer
);
2561 if (symbol_rank (sym
) == 0)
2565 if (sym
->as
->type
!= AS_EXPLICIT
)
2567 for (i
= 0; i
< sym
->as
->rank
; i
++)
2569 if (sym
->as
->upper
[i
]->expr_type
!= EXPR_CONSTANT
2570 || sym
->as
->lower
[i
]->expr_type
!= EXPR_CONSTANT
)
2573 elements
*= mpz_get_si (sym
->as
->upper
[i
]->value
.integer
)
2574 - mpz_get_si (sym
->as
->lower
[i
]->value
.integer
) + 1L;
2577 return strlen
*elements
;
2581 /* Returns the storage size of an expression (actual argument) or
2582 zero if it cannot be determined. For an array element, it returns
2583 the remaining size as the element sequence consists of all storage
2584 units of the actual argument up to the end of the array. */
2586 static unsigned long
2587 get_expr_storage_size (gfc_expr
*e
)
2590 long int strlen
, elements
;
2591 long int substrlen
= 0;
2592 bool is_str_storage
= false;
2598 if (e
->ts
.type
== BT_CHARACTER
)
2600 if (e
->ts
.u
.cl
&& e
->ts
.u
.cl
->length
2601 && e
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
2602 strlen
= mpz_get_si (e
->ts
.u
.cl
->length
->value
.integer
);
2603 else if (e
->expr_type
== EXPR_CONSTANT
2604 && (e
->ts
.u
.cl
== NULL
|| e
->ts
.u
.cl
->length
== NULL
))
2605 strlen
= e
->value
.character
.length
;
2610 strlen
= 1; /* Length per element. */
2612 if (e
->rank
== 0 && !e
->ref
)
2620 for (i
= 0; i
< e
->rank
; i
++)
2621 elements
*= mpz_get_si (e
->shape
[i
]);
2622 return elements
*strlen
;
2625 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
2627 if (ref
->type
== REF_SUBSTRING
&& ref
->u
.ss
.start
2628 && ref
->u
.ss
.start
->expr_type
== EXPR_CONSTANT
)
2632 /* The string length is the substring length.
2633 Set now to full string length. */
2634 if (!ref
->u
.ss
.length
|| !ref
->u
.ss
.length
->length
2635 || ref
->u
.ss
.length
->length
->expr_type
!= EXPR_CONSTANT
)
2638 strlen
= mpz_get_ui (ref
->u
.ss
.length
->length
->value
.integer
);
2640 substrlen
= strlen
- mpz_get_ui (ref
->u
.ss
.start
->value
.integer
) + 1;
2644 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.type
== AR_SECTION
)
2645 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
2647 long int start
, end
, stride
;
2650 if (ref
->u
.ar
.stride
[i
])
2652 if (ref
->u
.ar
.stride
[i
]->expr_type
== EXPR_CONSTANT
)
2653 stride
= mpz_get_si (ref
->u
.ar
.stride
[i
]->value
.integer
);
2658 if (ref
->u
.ar
.start
[i
])
2660 if (ref
->u
.ar
.start
[i
]->expr_type
== EXPR_CONSTANT
)
2661 start
= mpz_get_si (ref
->u
.ar
.start
[i
]->value
.integer
);
2665 else if (ref
->u
.ar
.as
->lower
[i
]
2666 && ref
->u
.ar
.as
->lower
[i
]->expr_type
== EXPR_CONSTANT
)
2667 start
= mpz_get_si (ref
->u
.ar
.as
->lower
[i
]->value
.integer
);
2671 if (ref
->u
.ar
.end
[i
])
2673 if (ref
->u
.ar
.end
[i
]->expr_type
== EXPR_CONSTANT
)
2674 end
= mpz_get_si (ref
->u
.ar
.end
[i
]->value
.integer
);
2678 else if (ref
->u
.ar
.as
->upper
[i
]
2679 && ref
->u
.ar
.as
->upper
[i
]->expr_type
== EXPR_CONSTANT
)
2680 end
= mpz_get_si (ref
->u
.ar
.as
->upper
[i
]->value
.integer
);
2684 elements
*= (end
- start
)/stride
+ 1L;
2686 else if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.type
== AR_FULL
)
2687 for (i
= 0; i
< ref
->u
.ar
.as
->rank
; i
++)
2689 if (ref
->u
.ar
.as
->lower
[i
] && ref
->u
.ar
.as
->upper
[i
]
2690 && ref
->u
.ar
.as
->lower
[i
]->expr_type
== EXPR_CONSTANT
2691 && ref
->u
.ar
.as
->lower
[i
]->ts
.type
== BT_INTEGER
2692 && ref
->u
.ar
.as
->upper
[i
]->expr_type
== EXPR_CONSTANT
2693 && ref
->u
.ar
.as
->upper
[i
]->ts
.type
== BT_INTEGER
)
2694 elements
*= mpz_get_si (ref
->u
.ar
.as
->upper
[i
]->value
.integer
)
2695 - mpz_get_si (ref
->u
.ar
.as
->lower
[i
]->value
.integer
)
2700 else if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.type
== AR_ELEMENT
2701 && e
->expr_type
== EXPR_VARIABLE
)
2703 if (ref
->u
.ar
.as
->type
== AS_ASSUMED_SHAPE
2704 || e
->symtree
->n
.sym
->attr
.pointer
)
2710 /* Determine the number of remaining elements in the element
2711 sequence for array element designators. */
2712 is_str_storage
= true;
2713 for (i
= ref
->u
.ar
.dimen
- 1; i
>= 0; i
--)
2715 if (ref
->u
.ar
.start
[i
] == NULL
2716 || ref
->u
.ar
.start
[i
]->expr_type
!= EXPR_CONSTANT
2717 || ref
->u
.ar
.as
->upper
[i
] == NULL
2718 || ref
->u
.ar
.as
->lower
[i
] == NULL
2719 || ref
->u
.ar
.as
->upper
[i
]->expr_type
!= EXPR_CONSTANT
2720 || ref
->u
.ar
.as
->lower
[i
]->expr_type
!= EXPR_CONSTANT
)
2725 * (mpz_get_si (ref
->u
.ar
.as
->upper
[i
]->value
.integer
)
2726 - mpz_get_si (ref
->u
.ar
.as
->lower
[i
]->value
.integer
)
2728 - (mpz_get_si (ref
->u
.ar
.start
[i
]->value
.integer
)
2729 - mpz_get_si (ref
->u
.ar
.as
->lower
[i
]->value
.integer
));
2732 else if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.function
2733 && ref
->u
.c
.component
->attr
.proc_pointer
2734 && ref
->u
.c
.component
->attr
.dimension
)
2736 /* Array-valued procedure-pointer components. */
2737 gfc_array_spec
*as
= ref
->u
.c
.component
->as
;
2738 for (i
= 0; i
< as
->rank
; i
++)
2740 if (!as
->upper
[i
] || !as
->lower
[i
]
2741 || as
->upper
[i
]->expr_type
!= EXPR_CONSTANT
2742 || as
->lower
[i
]->expr_type
!= EXPR_CONSTANT
)
2746 * (mpz_get_si (as
->upper
[i
]->value
.integer
)
2747 - mpz_get_si (as
->lower
[i
]->value
.integer
) + 1L);
2753 return (is_str_storage
) ? substrlen
+ (elements
-1)*strlen
2756 return elements
*strlen
;
2760 /* Given an expression, check whether it is an array section
2761 which has a vector subscript. If it has, one is returned,
2765 gfc_has_vector_subscript (gfc_expr
*e
)
2770 if (e
== NULL
|| e
->rank
== 0 || e
->expr_type
!= EXPR_VARIABLE
)
2773 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
2774 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.type
== AR_SECTION
)
2775 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
2776 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
)
2784 is_procptr_result (gfc_expr
*expr
)
2786 gfc_component
*c
= gfc_get_proc_ptr_comp (expr
);
2788 return (c
->ts
.interface
&& (c
->ts
.interface
->attr
.proc_pointer
== 1));
2790 return ((expr
->symtree
->n
.sym
->result
!= expr
->symtree
->n
.sym
)
2791 && (expr
->symtree
->n
.sym
->result
->attr
.proc_pointer
== 1));
2795 /* Given formal and actual argument lists, see if they are compatible.
2796 If they are compatible, the actual argument list is sorted to
2797 correspond with the formal list, and elements for missing optional
2798 arguments are inserted. If WHERE pointer is nonnull, then we issue
2799 errors when things don't match instead of just returning the status
2803 compare_actual_formal (gfc_actual_arglist
**ap
, gfc_formal_arglist
*formal
,
2804 int ranks_must_agree
, int is_elemental
, locus
*where
)
2806 gfc_actual_arglist
**new_arg
, *a
, *actual
;
2807 gfc_formal_arglist
*f
;
2809 unsigned long actual_size
, formal_size
;
2810 bool full_array
= false;
2814 if (actual
== NULL
&& formal
== NULL
)
2818 for (f
= formal
; f
; f
= f
->next
)
2821 new_arg
= XALLOCAVEC (gfc_actual_arglist
*, n
);
2823 for (i
= 0; i
< n
; i
++)
2830 for (a
= actual
; a
; a
= a
->next
, f
= f
->next
)
2832 /* Look for keywords but ignore g77 extensions like %VAL. */
2833 if (a
->name
!= NULL
&& a
->name
[0] != '%')
2836 for (f
= formal
; f
; f
= f
->next
, i
++)
2840 if (strcmp (f
->sym
->name
, a
->name
) == 0)
2847 gfc_error ("Keyword argument %qs at %L is not in "
2848 "the procedure", a
->name
, &a
->expr
->where
);
2852 if (new_arg
[i
] != NULL
)
2855 gfc_error ("Keyword argument %qs at %L is already associated "
2856 "with another actual argument", a
->name
,
2865 gfc_error ("More actual than formal arguments in procedure "
2866 "call at %L", where
);
2871 if (f
->sym
== NULL
&& a
->expr
== NULL
)
2877 gfc_error ("Missing alternate return spec in subroutine call "
2882 if (a
->expr
== NULL
)
2885 gfc_error ("Unexpected alternate return spec in subroutine "
2886 "call at %L", where
);
2890 /* Make sure that intrinsic vtables exist for calls to unlimited
2891 polymorphic formal arguments. */
2892 if (UNLIMITED_POLY (f
->sym
)
2893 && a
->expr
->ts
.type
!= BT_DERIVED
2894 && a
->expr
->ts
.type
!= BT_CLASS
)
2895 gfc_find_vtab (&a
->expr
->ts
);
2897 if (a
->expr
->expr_type
== EXPR_NULL
2898 && ((f
->sym
->ts
.type
!= BT_CLASS
&& !f
->sym
->attr
.pointer
2899 && (f
->sym
->attr
.allocatable
|| !f
->sym
->attr
.optional
2900 || (gfc_option
.allow_std
& GFC_STD_F2008
) == 0))
2901 || (f
->sym
->ts
.type
== BT_CLASS
2902 && !CLASS_DATA (f
->sym
)->attr
.class_pointer
2903 && (CLASS_DATA (f
->sym
)->attr
.allocatable
2904 || !f
->sym
->attr
.optional
2905 || (gfc_option
.allow_std
& GFC_STD_F2008
) == 0))))
2908 && (!f
->sym
->attr
.optional
2909 || (f
->sym
->ts
.type
!= BT_CLASS
&& f
->sym
->attr
.allocatable
)
2910 || (f
->sym
->ts
.type
== BT_CLASS
2911 && CLASS_DATA (f
->sym
)->attr
.allocatable
)))
2912 gfc_error ("Unexpected NULL() intrinsic at %L to dummy %qs",
2913 where
, f
->sym
->name
);
2915 gfc_error ("Fortran 2008: Null pointer at %L to non-pointer "
2916 "dummy %qs", where
, f
->sym
->name
);
2921 if (!compare_parameter (f
->sym
, a
->expr
, ranks_must_agree
,
2922 is_elemental
, where
))
2925 /* TS 29113, 6.3p2. */
2926 if (f
->sym
->ts
.type
== BT_ASSUMED
2927 && (a
->expr
->ts
.type
== BT_DERIVED
2928 || (a
->expr
->ts
.type
== BT_CLASS
&& CLASS_DATA (a
->expr
))))
2930 gfc_namespace
*f2k_derived
;
2932 f2k_derived
= a
->expr
->ts
.type
== BT_DERIVED
2933 ? a
->expr
->ts
.u
.derived
->f2k_derived
2934 : CLASS_DATA (a
->expr
)->ts
.u
.derived
->f2k_derived
;
2937 && (f2k_derived
->finalizers
|| f2k_derived
->tb_sym_root
))
2939 gfc_error ("Actual argument at %L to assumed-type dummy is of "
2940 "derived type with type-bound or FINAL procedures",
2946 /* Special case for character arguments. For allocatable, pointer
2947 and assumed-shape dummies, the string length needs to match
2949 if (a
->expr
->ts
.type
== BT_CHARACTER
2950 && a
->expr
->ts
.u
.cl
&& a
->expr
->ts
.u
.cl
->length
2951 && a
->expr
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
2952 && f
->sym
->ts
.u
.cl
&& f
->sym
->ts
.u
.cl
&& f
->sym
->ts
.u
.cl
->length
2953 && f
->sym
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
2954 && (f
->sym
->attr
.pointer
|| f
->sym
->attr
.allocatable
2955 || (f
->sym
->as
&& f
->sym
->as
->type
== AS_ASSUMED_SHAPE
))
2956 && (mpz_cmp (a
->expr
->ts
.u
.cl
->length
->value
.integer
,
2957 f
->sym
->ts
.u
.cl
->length
->value
.integer
) != 0))
2959 if (where
&& (f
->sym
->attr
.pointer
|| f
->sym
->attr
.allocatable
))
2961 "Character length mismatch (%ld/%ld) between actual "
2962 "argument and pointer or allocatable dummy argument "
2964 mpz_get_si (a
->expr
->ts
.u
.cl
->length
->value
.integer
),
2965 mpz_get_si (f
->sym
->ts
.u
.cl
->length
->value
.integer
),
2966 f
->sym
->name
, &a
->expr
->where
);
2969 "Character length mismatch (%ld/%ld) between actual "
2970 "argument and assumed-shape dummy argument %qs "
2972 mpz_get_si (a
->expr
->ts
.u
.cl
->length
->value
.integer
),
2973 mpz_get_si (f
->sym
->ts
.u
.cl
->length
->value
.integer
),
2974 f
->sym
->name
, &a
->expr
->where
);
2978 if ((f
->sym
->attr
.pointer
|| f
->sym
->attr
.allocatable
)
2979 && f
->sym
->ts
.deferred
!= a
->expr
->ts
.deferred
2980 && a
->expr
->ts
.type
== BT_CHARACTER
)
2983 gfc_error ("Actual argument at %L to allocatable or "
2984 "pointer dummy argument %qs must have a deferred "
2985 "length type parameter if and only if the dummy has one",
2986 &a
->expr
->where
, f
->sym
->name
);
2990 if (f
->sym
->ts
.type
== BT_CLASS
)
2991 goto skip_size_check
;
2993 actual_size
= get_expr_storage_size (a
->expr
);
2994 formal_size
= get_sym_storage_size (f
->sym
);
2995 if (actual_size
!= 0 && actual_size
< formal_size
2996 && a
->expr
->ts
.type
!= BT_PROCEDURE
2997 && f
->sym
->attr
.flavor
!= FL_PROCEDURE
)
2999 if (a
->expr
->ts
.type
== BT_CHARACTER
&& !f
->sym
->as
&& where
)
3000 gfc_warning (0, "Character length of actual argument shorter "
3001 "than of dummy argument %qs (%lu/%lu) at %L",
3002 f
->sym
->name
, actual_size
, formal_size
,
3005 gfc_warning (0, "Actual argument contains too few "
3006 "elements for dummy argument %qs (%lu/%lu) at %L",
3007 f
->sym
->name
, actual_size
, formal_size
,
3014 /* Satisfy F03:12.4.1.3 by ensuring that a procedure pointer actual
3015 argument is provided for a procedure pointer formal argument. */
3016 if (f
->sym
->attr
.proc_pointer
3017 && !((a
->expr
->expr_type
== EXPR_VARIABLE
3018 && (a
->expr
->symtree
->n
.sym
->attr
.proc_pointer
3019 || gfc_is_proc_ptr_comp (a
->expr
)))
3020 || (a
->expr
->expr_type
== EXPR_FUNCTION
3021 && is_procptr_result (a
->expr
))))
3024 gfc_error ("Expected a procedure pointer for argument %qs at %L",
3025 f
->sym
->name
, &a
->expr
->where
);
3029 /* Satisfy F03:12.4.1.3 by ensuring that a procedure actual argument is
3030 provided for a procedure formal argument. */
3031 if (f
->sym
->attr
.flavor
== FL_PROCEDURE
3032 && !((a
->expr
->expr_type
== EXPR_VARIABLE
3033 && (a
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
3034 || a
->expr
->symtree
->n
.sym
->attr
.proc_pointer
3035 || gfc_is_proc_ptr_comp (a
->expr
)))
3036 || (a
->expr
->expr_type
== EXPR_FUNCTION
3037 && is_procptr_result (a
->expr
))))
3040 gfc_error ("Expected a procedure for argument %qs at %L",
3041 f
->sym
->name
, &a
->expr
->where
);
3045 if (f
->sym
->as
&& f
->sym
->as
->type
== AS_ASSUMED_SHAPE
3046 && a
->expr
->expr_type
== EXPR_VARIABLE
3047 && a
->expr
->symtree
->n
.sym
->as
3048 && a
->expr
->symtree
->n
.sym
->as
->type
== AS_ASSUMED_SIZE
3049 && (a
->expr
->ref
== NULL
3050 || (a
->expr
->ref
->type
== REF_ARRAY
3051 && a
->expr
->ref
->u
.ar
.type
== AR_FULL
)))
3054 gfc_error ("Actual argument for %qs cannot be an assumed-size"
3055 " array at %L", f
->sym
->name
, where
);
3059 if (a
->expr
->expr_type
!= EXPR_NULL
3060 && compare_pointer (f
->sym
, a
->expr
) == 0)
3063 gfc_error ("Actual argument for %qs must be a pointer at %L",
3064 f
->sym
->name
, &a
->expr
->where
);
3068 if (a
->expr
->expr_type
!= EXPR_NULL
3069 && (gfc_option
.allow_std
& GFC_STD_F2008
) == 0
3070 && compare_pointer (f
->sym
, a
->expr
) == 2)
3073 gfc_error ("Fortran 2008: Non-pointer actual argument at %L to "
3074 "pointer dummy %qs", &a
->expr
->where
,f
->sym
->name
);
3079 /* Fortran 2008, C1242. */
3080 if (f
->sym
->attr
.pointer
&& gfc_is_coindexed (a
->expr
))
3083 gfc_error ("Coindexed actual argument at %L to pointer "
3085 &a
->expr
->where
, f
->sym
->name
);
3089 /* Fortran 2008, 12.5.2.5 (no constraint). */
3090 if (a
->expr
->expr_type
== EXPR_VARIABLE
3091 && f
->sym
->attr
.intent
!= INTENT_IN
3092 && f
->sym
->attr
.allocatable
3093 && gfc_is_coindexed (a
->expr
))
3096 gfc_error ("Coindexed actual argument at %L to allocatable "
3097 "dummy %qs requires INTENT(IN)",
3098 &a
->expr
->where
, f
->sym
->name
);
3102 /* Fortran 2008, C1237. */
3103 if (a
->expr
->expr_type
== EXPR_VARIABLE
3104 && (f
->sym
->attr
.asynchronous
|| f
->sym
->attr
.volatile_
)
3105 && gfc_is_coindexed (a
->expr
)
3106 && (a
->expr
->symtree
->n
.sym
->attr
.volatile_
3107 || a
->expr
->symtree
->n
.sym
->attr
.asynchronous
))
3110 gfc_error ("Coindexed ASYNCHRONOUS or VOLATILE actual argument at "
3111 "%L requires that dummy %qs has neither "
3112 "ASYNCHRONOUS nor VOLATILE", &a
->expr
->where
,
3117 /* Fortran 2008, 12.5.2.4 (no constraint). */
3118 if (a
->expr
->expr_type
== EXPR_VARIABLE
3119 && f
->sym
->attr
.intent
!= INTENT_IN
&& !f
->sym
->attr
.value
3120 && gfc_is_coindexed (a
->expr
)
3121 && gfc_has_ultimate_allocatable (a
->expr
))
3124 gfc_error ("Coindexed actual argument at %L with allocatable "
3125 "ultimate component to dummy %qs requires either VALUE "
3126 "or INTENT(IN)", &a
->expr
->where
, f
->sym
->name
);
3130 if (f
->sym
->ts
.type
== BT_CLASS
3131 && CLASS_DATA (f
->sym
)->attr
.allocatable
3132 && gfc_is_class_array_ref (a
->expr
, &full_array
)
3136 gfc_error ("Actual CLASS array argument for %qs must be a full "
3137 "array at %L", f
->sym
->name
, &a
->expr
->where
);
3142 if (a
->expr
->expr_type
!= EXPR_NULL
3143 && compare_allocatable (f
->sym
, a
->expr
) == 0)
3146 gfc_error ("Actual argument for %qs must be ALLOCATABLE at %L",
3147 f
->sym
->name
, &a
->expr
->where
);
3151 /* Check intent = OUT/INOUT for definable actual argument. */
3152 if ((f
->sym
->attr
.intent
== INTENT_OUT
3153 || f
->sym
->attr
.intent
== INTENT_INOUT
))
3155 const char* context
= (where
3156 ? _("actual argument to INTENT = OUT/INOUT")
3159 if (((f
->sym
->ts
.type
== BT_CLASS
&& f
->sym
->attr
.class_ok
3160 && CLASS_DATA (f
->sym
)->attr
.class_pointer
)
3161 || (f
->sym
->ts
.type
!= BT_CLASS
&& f
->sym
->attr
.pointer
))
3162 && !gfc_check_vardef_context (a
->expr
, true, false, false, context
))
3164 if (!gfc_check_vardef_context (a
->expr
, false, false, false, context
))
3168 if ((f
->sym
->attr
.intent
== INTENT_OUT
3169 || f
->sym
->attr
.intent
== INTENT_INOUT
3170 || f
->sym
->attr
.volatile_
3171 || f
->sym
->attr
.asynchronous
)
3172 && gfc_has_vector_subscript (a
->expr
))
3175 gfc_error ("Array-section actual argument with vector "
3176 "subscripts at %L is incompatible with INTENT(OUT), "
3177 "INTENT(INOUT), VOLATILE or ASYNCHRONOUS attribute "
3178 "of the dummy argument %qs",
3179 &a
->expr
->where
, f
->sym
->name
);
3183 /* C1232 (R1221) For an actual argument which is an array section or
3184 an assumed-shape array, the dummy argument shall be an assumed-
3185 shape array, if the dummy argument has the VOLATILE attribute. */
3187 if (f
->sym
->attr
.volatile_
3188 && a
->expr
->symtree
->n
.sym
->as
3189 && a
->expr
->symtree
->n
.sym
->as
->type
== AS_ASSUMED_SHAPE
3190 && !(f
->sym
->as
&& f
->sym
->as
->type
== AS_ASSUMED_SHAPE
))
3193 gfc_error ("Assumed-shape actual argument at %L is "
3194 "incompatible with the non-assumed-shape "
3195 "dummy argument %qs due to VOLATILE attribute",
3196 &a
->expr
->where
,f
->sym
->name
);
3200 if (f
->sym
->attr
.volatile_
3201 && a
->expr
->ref
&& a
->expr
->ref
->u
.ar
.type
== AR_SECTION
3202 && !(f
->sym
->as
&& f
->sym
->as
->type
== AS_ASSUMED_SHAPE
))
3205 gfc_error ("Array-section actual argument at %L is "
3206 "incompatible with the non-assumed-shape "
3207 "dummy argument %qs due to VOLATILE attribute",
3208 &a
->expr
->where
,f
->sym
->name
);
3212 /* C1233 (R1221) For an actual argument which is a pointer array, the
3213 dummy argument shall be an assumed-shape or pointer array, if the
3214 dummy argument has the VOLATILE attribute. */
3216 if (f
->sym
->attr
.volatile_
3217 && a
->expr
->symtree
->n
.sym
->attr
.pointer
3218 && a
->expr
->symtree
->n
.sym
->as
3220 && (f
->sym
->as
->type
== AS_ASSUMED_SHAPE
3221 || f
->sym
->attr
.pointer
)))
3224 gfc_error ("Pointer-array actual argument at %L requires "
3225 "an assumed-shape or pointer-array dummy "
3226 "argument %qs due to VOLATILE attribute",
3227 &a
->expr
->where
,f
->sym
->name
);
3238 /* Make sure missing actual arguments are optional. */
3240 for (f
= formal
; f
; f
= f
->next
, i
++)
3242 if (new_arg
[i
] != NULL
)
3247 gfc_error ("Missing alternate return spec in subroutine call "
3251 if (!f
->sym
->attr
.optional
)
3254 gfc_error ("Missing actual argument for argument %qs at %L",
3255 f
->sym
->name
, where
);
3260 /* The argument lists are compatible. We now relink a new actual
3261 argument list with null arguments in the right places. The head
3262 of the list remains the head. */
3263 for (i
= 0; i
< n
; i
++)
3264 if (new_arg
[i
] == NULL
)
3265 new_arg
[i
] = gfc_get_actual_arglist ();
3269 std::swap (*new_arg
[0], *actual
);
3270 std::swap (new_arg
[0], new_arg
[na
]);
3273 for (i
= 0; i
< n
- 1; i
++)
3274 new_arg
[i
]->next
= new_arg
[i
+ 1];
3276 new_arg
[i
]->next
= NULL
;
3278 if (*ap
== NULL
&& n
> 0)
3281 /* Note the types of omitted optional arguments. */
3282 for (a
= *ap
, f
= formal
; a
; a
= a
->next
, f
= f
->next
)
3283 if (a
->expr
== NULL
&& a
->label
== NULL
)
3284 a
->missing_arg_type
= f
->sym
->ts
.type
;
3292 gfc_formal_arglist
*f
;
3293 gfc_actual_arglist
*a
;
3297 /* qsort comparison function for argument pairs, with the following
3299 - p->a->expr == NULL
3300 - p->a->expr->expr_type != EXPR_VARIABLE
3301 - growing p->a->expr->symbol. */
3304 pair_cmp (const void *p1
, const void *p2
)
3306 const gfc_actual_arglist
*a1
, *a2
;
3308 /* *p1 and *p2 are elements of the to-be-sorted array. */
3309 a1
= ((const argpair
*) p1
)->a
;
3310 a2
= ((const argpair
*) p2
)->a
;
3319 if (a1
->expr
->expr_type
!= EXPR_VARIABLE
)
3321 if (a2
->expr
->expr_type
!= EXPR_VARIABLE
)
3325 if (a2
->expr
->expr_type
!= EXPR_VARIABLE
)
3327 return a1
->expr
->symtree
->n
.sym
< a2
->expr
->symtree
->n
.sym
;
3331 /* Given two expressions from some actual arguments, test whether they
3332 refer to the same expression. The analysis is conservative.
3333 Returning false will produce no warning. */
3336 compare_actual_expr (gfc_expr
*e1
, gfc_expr
*e2
)
3338 const gfc_ref
*r1
, *r2
;
3341 || e1
->expr_type
!= EXPR_VARIABLE
3342 || e2
->expr_type
!= EXPR_VARIABLE
3343 || e1
->symtree
->n
.sym
!= e2
->symtree
->n
.sym
)
3346 /* TODO: improve comparison, see expr.c:show_ref(). */
3347 for (r1
= e1
->ref
, r2
= e2
->ref
; r1
&& r2
; r1
= r1
->next
, r2
= r2
->next
)
3349 if (r1
->type
!= r2
->type
)
3354 if (r1
->u
.ar
.type
!= r2
->u
.ar
.type
)
3356 /* TODO: At the moment, consider only full arrays;
3357 we could do better. */
3358 if (r1
->u
.ar
.type
!= AR_FULL
|| r2
->u
.ar
.type
!= AR_FULL
)
3363 if (r1
->u
.c
.component
!= r2
->u
.c
.component
)
3371 gfc_internal_error ("compare_actual_expr(): Bad component code");
3380 /* Given formal and actual argument lists that correspond to one
3381 another, check that identical actual arguments aren't not
3382 associated with some incompatible INTENTs. */
3385 check_some_aliasing (gfc_formal_arglist
*f
, gfc_actual_arglist
*a
)
3387 sym_intent f1_intent
, f2_intent
;
3388 gfc_formal_arglist
*f1
;
3389 gfc_actual_arglist
*a1
;
3395 for (f1
= f
, a1
= a
;; f1
= f1
->next
, a1
= a1
->next
)
3397 if (f1
== NULL
&& a1
== NULL
)
3399 if (f1
== NULL
|| a1
== NULL
)
3400 gfc_internal_error ("check_some_aliasing(): List mismatch");
3405 p
= XALLOCAVEC (argpair
, n
);
3407 for (i
= 0, f1
= f
, a1
= a
; i
< n
; i
++, f1
= f1
->next
, a1
= a1
->next
)
3413 qsort (p
, n
, sizeof (argpair
), pair_cmp
);
3415 for (i
= 0; i
< n
; i
++)
3418 || p
[i
].a
->expr
->expr_type
!= EXPR_VARIABLE
3419 || p
[i
].a
->expr
->ts
.type
== BT_PROCEDURE
)
3421 f1_intent
= p
[i
].f
->sym
->attr
.intent
;
3422 for (j
= i
+ 1; j
< n
; j
++)
3424 /* Expected order after the sort. */
3425 if (!p
[j
].a
->expr
|| p
[j
].a
->expr
->expr_type
!= EXPR_VARIABLE
)
3426 gfc_internal_error ("check_some_aliasing(): corrupted data");
3428 /* Are the expression the same? */
3429 if (!compare_actual_expr (p
[i
].a
->expr
, p
[j
].a
->expr
))
3431 f2_intent
= p
[j
].f
->sym
->attr
.intent
;
3432 if ((f1_intent
== INTENT_IN
&& f2_intent
== INTENT_OUT
)
3433 || (f1_intent
== INTENT_OUT
&& f2_intent
== INTENT_IN
)
3434 || (f1_intent
== INTENT_OUT
&& f2_intent
== INTENT_OUT
))
3436 gfc_warning (0, "Same actual argument associated with INTENT(%s) "
3437 "argument %qs and INTENT(%s) argument %qs at %L",
3438 gfc_intent_string (f1_intent
), p
[i
].f
->sym
->name
,
3439 gfc_intent_string (f2_intent
), p
[j
].f
->sym
->name
,
3440 &p
[i
].a
->expr
->where
);
3450 /* Given formal and actual argument lists that correspond to one
3451 another, check that they are compatible in the sense that intents
3452 are not mismatched. */
3455 check_intents (gfc_formal_arglist
*f
, gfc_actual_arglist
*a
)
3457 sym_intent f_intent
;
3459 for (;; f
= f
->next
, a
= a
->next
)
3463 if (f
== NULL
&& a
== NULL
)
3465 if (f
== NULL
|| a
== NULL
)
3466 gfc_internal_error ("check_intents(): List mismatch");
3468 if (a
->expr
&& a
->expr
->expr_type
== EXPR_FUNCTION
3469 && a
->expr
->value
.function
.isym
3470 && a
->expr
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
3471 expr
= a
->expr
->value
.function
.actual
->expr
;
3475 if (expr
== NULL
|| expr
->expr_type
!= EXPR_VARIABLE
)
3478 f_intent
= f
->sym
->attr
.intent
;
3480 if (gfc_pure (NULL
) && gfc_impure_variable (expr
->symtree
->n
.sym
))
3482 if ((f
->sym
->ts
.type
== BT_CLASS
&& f
->sym
->attr
.class_ok
3483 && CLASS_DATA (f
->sym
)->attr
.class_pointer
)
3484 || (f
->sym
->ts
.type
!= BT_CLASS
&& f
->sym
->attr
.pointer
))
3486 gfc_error ("Procedure argument at %L is local to a PURE "
3487 "procedure and has the POINTER attribute",
3493 /* Fortran 2008, C1283. */
3494 if (gfc_pure (NULL
) && gfc_is_coindexed (expr
))
3496 if (f_intent
== INTENT_INOUT
|| f_intent
== INTENT_OUT
)
3498 gfc_error ("Coindexed actual argument at %L in PURE procedure "
3499 "is passed to an INTENT(%s) argument",
3500 &expr
->where
, gfc_intent_string (f_intent
));
3504 if ((f
->sym
->ts
.type
== BT_CLASS
&& f
->sym
->attr
.class_ok
3505 && CLASS_DATA (f
->sym
)->attr
.class_pointer
)
3506 || (f
->sym
->ts
.type
!= BT_CLASS
&& f
->sym
->attr
.pointer
))
3508 gfc_error ("Coindexed actual argument at %L in PURE procedure "
3509 "is passed to a POINTER dummy argument",
3515 /* F2008, Section 12.5.2.4. */
3516 if (expr
->ts
.type
== BT_CLASS
&& f
->sym
->ts
.type
== BT_CLASS
3517 && gfc_is_coindexed (expr
))
3519 gfc_error ("Coindexed polymorphic actual argument at %L is passed "
3520 "polymorphic dummy argument %qs",
3521 &expr
->where
, f
->sym
->name
);
3530 /* Check how a procedure is used against its interface. If all goes
3531 well, the actual argument list will also end up being properly
3535 gfc_procedure_use (gfc_symbol
*sym
, gfc_actual_arglist
**ap
, locus
*where
)
3537 gfc_formal_arglist
*dummy_args
;
3539 /* Warn about calls with an implicit interface. Special case
3540 for calling a ISO_C_BINDING because c_loc and c_funloc
3541 are pseudo-unknown. Additionally, warn about procedures not
3542 explicitly declared at all if requested. */
3543 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
&& !sym
->attr
.is_iso_c
)
3545 if (sym
->ns
->has_implicit_none_export
&& sym
->attr
.proc
== PROC_UNKNOWN
)
3547 gfc_error ("Procedure %qs called at %L is not explicitly declared",
3551 if (warn_implicit_interface
)
3552 gfc_warning (OPT_Wimplicit_interface
,
3553 "Procedure %qs called with an implicit interface at %L",
3555 else if (warn_implicit_procedure
&& sym
->attr
.proc
== PROC_UNKNOWN
)
3556 gfc_warning (OPT_Wimplicit_procedure
,
3557 "Procedure %qs called at %L is not explicitly declared",
3561 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
)
3563 gfc_actual_arglist
*a
;
3565 if (sym
->attr
.pointer
)
3567 gfc_error ("The pointer object %qs at %L must have an explicit "
3568 "function interface or be declared as array",
3573 if (sym
->attr
.allocatable
&& !sym
->attr
.external
)
3575 gfc_error ("The allocatable object %qs at %L must have an explicit "
3576 "function interface or be declared as array",
3581 if (sym
->attr
.allocatable
)
3583 gfc_error ("Allocatable function %qs at %L must have an explicit "
3584 "function interface", sym
->name
, where
);
3588 for (a
= *ap
; a
; a
= a
->next
)
3590 /* Skip g77 keyword extensions like %VAL, %REF, %LOC. */
3591 if (a
->name
!= NULL
&& a
->name
[0] != '%')
3593 gfc_error ("Keyword argument requires explicit interface "
3594 "for procedure %qs at %L", sym
->name
, &a
->expr
->where
);
3598 /* TS 29113, 6.2. */
3599 if (a
->expr
&& a
->expr
->ts
.type
== BT_ASSUMED
3600 && sym
->intmod_sym_id
!= ISOCBINDING_LOC
)
3602 gfc_error ("Assumed-type argument %s at %L requires an explicit "
3603 "interface", a
->expr
->symtree
->n
.sym
->name
,
3608 /* F2008, C1303 and C1304. */
3610 && (a
->expr
->ts
.type
== BT_DERIVED
|| a
->expr
->ts
.type
== BT_CLASS
)
3611 && ((a
->expr
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
3612 && a
->expr
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
3613 || gfc_expr_attr (a
->expr
).lock_comp
))
3615 gfc_error ("Actual argument of LOCK_TYPE or with LOCK_TYPE "
3616 "component at %L requires an explicit interface for "
3617 "procedure %qs", &a
->expr
->where
, sym
->name
);
3622 && (a
->expr
->ts
.type
== BT_DERIVED
|| a
->expr
->ts
.type
== BT_CLASS
)
3623 && ((a
->expr
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
3624 && a
->expr
->ts
.u
.derived
->intmod_sym_id
3625 == ISOFORTRAN_EVENT_TYPE
)
3626 || gfc_expr_attr (a
->expr
).event_comp
))
3628 gfc_error ("Actual argument of EVENT_TYPE or with EVENT_TYPE "
3629 "component at %L requires an explicit interface for "
3630 "procedure %qs", &a
->expr
->where
, sym
->name
);
3634 if (a
->expr
&& a
->expr
->expr_type
== EXPR_NULL
3635 && a
->expr
->ts
.type
== BT_UNKNOWN
)
3637 gfc_error ("MOLD argument to NULL required at %L", &a
->expr
->where
);
3641 /* TS 29113, C407b. */
3642 if (a
->expr
&& a
->expr
->expr_type
== EXPR_VARIABLE
3643 && symbol_rank (a
->expr
->symtree
->n
.sym
) == -1)
3645 gfc_error ("Assumed-rank argument requires an explicit interface "
3646 "at %L", &a
->expr
->where
);
3654 dummy_args
= gfc_sym_get_dummy_args (sym
);
3656 if (!compare_actual_formal (ap
, dummy_args
, 0, sym
->attr
.elemental
, where
))
3659 if (!check_intents (dummy_args
, *ap
))
3663 check_some_aliasing (dummy_args
, *ap
);
3669 /* Check how a procedure pointer component is used against its interface.
3670 If all goes well, the actual argument list will also end up being properly
3671 sorted. Completely analogous to gfc_procedure_use. */
3674 gfc_ppc_use (gfc_component
*comp
, gfc_actual_arglist
**ap
, locus
*where
)
3676 /* Warn about calls with an implicit interface. Special case
3677 for calling a ISO_C_BINDING because c_loc and c_funloc
3678 are pseudo-unknown. */
3679 if (warn_implicit_interface
3680 && comp
->attr
.if_source
== IFSRC_UNKNOWN
3681 && !comp
->attr
.is_iso_c
)
3682 gfc_warning (OPT_Wimplicit_interface
,
3683 "Procedure pointer component %qs called with an implicit "
3684 "interface at %L", comp
->name
, where
);
3686 if (comp
->attr
.if_source
== IFSRC_UNKNOWN
)
3688 gfc_actual_arglist
*a
;
3689 for (a
= *ap
; a
; a
= a
->next
)
3691 /* Skip g77 keyword extensions like %VAL, %REF, %LOC. */
3692 if (a
->name
!= NULL
&& a
->name
[0] != '%')
3694 gfc_error ("Keyword argument requires explicit interface "
3695 "for procedure pointer component %qs at %L",
3696 comp
->name
, &a
->expr
->where
);
3704 if (!compare_actual_formal (ap
, comp
->ts
.interface
->formal
, 0,
3705 comp
->attr
.elemental
, where
))
3708 check_intents (comp
->ts
.interface
->formal
, *ap
);
3710 check_some_aliasing (comp
->ts
.interface
->formal
, *ap
);
3714 /* Try if an actual argument list matches the formal list of a symbol,
3715 respecting the symbol's attributes like ELEMENTAL. This is used for
3716 GENERIC resolution. */
3719 gfc_arglist_matches_symbol (gfc_actual_arglist
** args
, gfc_symbol
* sym
)
3721 gfc_formal_arglist
*dummy_args
;
3724 if (sym
->attr
.flavor
!= FL_PROCEDURE
)
3727 dummy_args
= gfc_sym_get_dummy_args (sym
);
3729 r
= !sym
->attr
.elemental
;
3730 if (compare_actual_formal (args
, dummy_args
, r
, !r
, NULL
))
3732 check_intents (dummy_args
, *args
);
3734 check_some_aliasing (dummy_args
, *args
);
3742 /* Given an interface pointer and an actual argument list, search for
3743 a formal argument list that matches the actual. If found, returns
3744 a pointer to the symbol of the correct interface. Returns NULL if
3748 gfc_search_interface (gfc_interface
*intr
, int sub_flag
,
3749 gfc_actual_arglist
**ap
)
3751 gfc_symbol
*elem_sym
= NULL
;
3752 gfc_symbol
*null_sym
= NULL
;
3753 locus null_expr_loc
;
3754 gfc_actual_arglist
*a
;
3755 bool has_null_arg
= false;
3757 for (a
= *ap
; a
; a
= a
->next
)
3758 if (a
->expr
&& a
->expr
->expr_type
== EXPR_NULL
3759 && a
->expr
->ts
.type
== BT_UNKNOWN
)
3761 has_null_arg
= true;
3762 null_expr_loc
= a
->expr
->where
;
3766 for (; intr
; intr
= intr
->next
)
3768 if (gfc_fl_struct (intr
->sym
->attr
.flavor
))
3770 if (sub_flag
&& intr
->sym
->attr
.function
)
3772 if (!sub_flag
&& intr
->sym
->attr
.subroutine
)
3775 if (gfc_arglist_matches_symbol (ap
, intr
->sym
))
3777 if (has_null_arg
&& null_sym
)
3779 gfc_error ("MOLD= required in NULL() argument at %L: Ambiguity "
3780 "between specific functions %s and %s",
3781 &null_expr_loc
, null_sym
->name
, intr
->sym
->name
);
3784 else if (has_null_arg
)
3786 null_sym
= intr
->sym
;
3790 /* Satisfy 12.4.4.1 such that an elemental match has lower
3791 weight than a non-elemental match. */
3792 if (intr
->sym
->attr
.elemental
)
3794 elem_sym
= intr
->sym
;
3804 return elem_sym
? elem_sym
: NULL
;
3808 /* Do a brute force recursive search for a symbol. */
3810 static gfc_symtree
*
3811 find_symtree0 (gfc_symtree
*root
, gfc_symbol
*sym
)
3815 if (root
->n
.sym
== sym
)
3820 st
= find_symtree0 (root
->left
, sym
);
3821 if (root
->right
&& ! st
)
3822 st
= find_symtree0 (root
->right
, sym
);
3827 /* Find a symtree for a symbol. */
3830 gfc_find_sym_in_symtree (gfc_symbol
*sym
)
3835 /* First try to find it by name. */
3836 gfc_find_sym_tree (sym
->name
, gfc_current_ns
, 1, &st
);
3837 if (st
&& st
->n
.sym
== sym
)
3840 /* If it's been renamed, resort to a brute-force search. */
3841 /* TODO: avoid having to do this search. If the symbol doesn't exist
3842 in the symtree for the current namespace, it should probably be added. */
3843 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
3845 st
= find_symtree0 (ns
->sym_root
, sym
);
3849 gfc_internal_error ("Unable to find symbol %qs", sym
->name
);
3854 /* See if the arglist to an operator-call contains a derived-type argument
3855 with a matching type-bound operator. If so, return the matching specific
3856 procedure defined as operator-target as well as the base-object to use
3857 (which is the found derived-type argument with operator). The generic
3858 name, if any, is transmitted to the final expression via 'gname'. */
3860 static gfc_typebound_proc
*
3861 matching_typebound_op (gfc_expr
** tb_base
,
3862 gfc_actual_arglist
* args
,
3863 gfc_intrinsic_op op
, const char* uop
,
3864 const char ** gname
)
3866 gfc_actual_arglist
* base
;
3868 for (base
= args
; base
; base
= base
->next
)
3869 if (base
->expr
->ts
.type
== BT_DERIVED
|| base
->expr
->ts
.type
== BT_CLASS
)
3871 gfc_typebound_proc
* tb
;
3872 gfc_symbol
* derived
;
3875 while (base
->expr
->expr_type
== EXPR_OP
3876 && base
->expr
->value
.op
.op
== INTRINSIC_PARENTHESES
)
3877 base
->expr
= base
->expr
->value
.op
.op1
;
3879 if (base
->expr
->ts
.type
== BT_CLASS
)
3881 if (CLASS_DATA (base
->expr
) == NULL
3882 || !gfc_expr_attr (base
->expr
).class_ok
)
3884 derived
= CLASS_DATA (base
->expr
)->ts
.u
.derived
;
3887 derived
= base
->expr
->ts
.u
.derived
;
3889 if (op
== INTRINSIC_USER
)
3891 gfc_symtree
* tb_uop
;
3894 tb_uop
= gfc_find_typebound_user_op (derived
, &result
, uop
,
3903 tb
= gfc_find_typebound_intrinsic_op (derived
, &result
, op
,
3906 /* This means we hit a PRIVATE operator which is use-associated and
3907 should thus not be seen. */
3911 /* Look through the super-type hierarchy for a matching specific
3913 for (; tb
; tb
= tb
->overridden
)
3917 gcc_assert (tb
->is_generic
);
3918 for (g
= tb
->u
.generic
; g
; g
= g
->next
)
3921 gfc_actual_arglist
* argcopy
;
3924 gcc_assert (g
->specific
);
3925 if (g
->specific
->error
)
3928 target
= g
->specific
->u
.specific
->n
.sym
;
3930 /* Check if this arglist matches the formal. */
3931 argcopy
= gfc_copy_actual_arglist (args
);
3932 matches
= gfc_arglist_matches_symbol (&argcopy
, target
);
3933 gfc_free_actual_arglist (argcopy
);
3935 /* Return if we found a match. */
3938 *tb_base
= base
->expr
;
3939 *gname
= g
->specific_st
->name
;
3950 /* For the 'actual arglist' of an operator call and a specific typebound
3951 procedure that has been found the target of a type-bound operator, build the
3952 appropriate EXPR_COMPCALL and resolve it. We take this indirection over
3953 type-bound procedures rather than resolving type-bound operators 'directly'
3954 so that we can reuse the existing logic. */
3957 build_compcall_for_operator (gfc_expr
* e
, gfc_actual_arglist
* actual
,
3958 gfc_expr
* base
, gfc_typebound_proc
* target
,
3961 e
->expr_type
= EXPR_COMPCALL
;
3962 e
->value
.compcall
.tbp
= target
;
3963 e
->value
.compcall
.name
= gname
? gname
: "$op";
3964 e
->value
.compcall
.actual
= actual
;
3965 e
->value
.compcall
.base_object
= base
;
3966 e
->value
.compcall
.ignore_pass
= 1;
3967 e
->value
.compcall
.assign
= 0;
3968 if (e
->ts
.type
== BT_UNKNOWN
3969 && target
->function
)
3971 if (target
->is_generic
)
3972 e
->ts
= target
->u
.generic
->specific
->u
.specific
->n
.sym
->ts
;
3974 e
->ts
= target
->u
.specific
->n
.sym
->ts
;
3979 /* This subroutine is called when an expression is being resolved.
3980 The expression node in question is either a user defined operator
3981 or an intrinsic operator with arguments that aren't compatible
3982 with the operator. This subroutine builds an actual argument list
3983 corresponding to the operands, then searches for a compatible
3984 interface. If one is found, the expression node is replaced with
3985 the appropriate function call. We use the 'match' enum to specify
3986 whether a replacement has been made or not, or if an error occurred. */
3989 gfc_extend_expr (gfc_expr
*e
)
3991 gfc_actual_arglist
*actual
;
3997 gfc_typebound_proc
* tbo
;
4002 actual
= gfc_get_actual_arglist ();
4003 actual
->expr
= e
->value
.op
.op1
;
4007 if (e
->value
.op
.op2
!= NULL
)
4009 actual
->next
= gfc_get_actual_arglist ();
4010 actual
->next
->expr
= e
->value
.op
.op2
;
4013 i
= fold_unary_intrinsic (e
->value
.op
.op
);
4015 /* See if we find a matching type-bound operator. */
4016 if (i
== INTRINSIC_USER
)
4017 tbo
= matching_typebound_op (&tb_base
, actual
,
4018 i
, e
->value
.op
.uop
->name
, &gname
);
4022 #define CHECK_OS_COMPARISON(comp) \
4023 case INTRINSIC_##comp: \
4024 case INTRINSIC_##comp##_OS: \
4025 tbo = matching_typebound_op (&tb_base, actual, \
4026 INTRINSIC_##comp, NULL, &gname); \
4028 tbo = matching_typebound_op (&tb_base, actual, \
4029 INTRINSIC_##comp##_OS, NULL, &gname); \
4031 CHECK_OS_COMPARISON(EQ
)
4032 CHECK_OS_COMPARISON(NE
)
4033 CHECK_OS_COMPARISON(GT
)
4034 CHECK_OS_COMPARISON(GE
)
4035 CHECK_OS_COMPARISON(LT
)
4036 CHECK_OS_COMPARISON(LE
)
4037 #undef CHECK_OS_COMPARISON
4040 tbo
= matching_typebound_op (&tb_base
, actual
, i
, NULL
, &gname
);
4044 /* If there is a matching typebound-operator, replace the expression with
4045 a call to it and succeed. */
4048 gcc_assert (tb_base
);
4049 build_compcall_for_operator (e
, actual
, tb_base
, tbo
, gname
);
4051 if (!gfc_resolve_expr (e
))
4057 if (i
== INTRINSIC_USER
)
4059 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
4061 uop
= gfc_find_uop (e
->value
.op
.uop
->name
, ns
);
4065 sym
= gfc_search_interface (uop
->op
, 0, &actual
);
4072 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
4074 /* Due to the distinction between '==' and '.eq.' and friends, one has
4075 to check if either is defined. */
4078 #define CHECK_OS_COMPARISON(comp) \
4079 case INTRINSIC_##comp: \
4080 case INTRINSIC_##comp##_OS: \
4081 sym = gfc_search_interface (ns->op[INTRINSIC_##comp], 0, &actual); \
4083 sym = gfc_search_interface (ns->op[INTRINSIC_##comp##_OS], 0, &actual); \
4085 CHECK_OS_COMPARISON(EQ
)
4086 CHECK_OS_COMPARISON(NE
)
4087 CHECK_OS_COMPARISON(GT
)
4088 CHECK_OS_COMPARISON(GE
)
4089 CHECK_OS_COMPARISON(LT
)
4090 CHECK_OS_COMPARISON(LE
)
4091 #undef CHECK_OS_COMPARISON
4094 sym
= gfc_search_interface (ns
->op
[i
], 0, &actual
);
4102 /* TODO: Do an ambiguity-check and error if multiple matching interfaces are
4103 found rather than just taking the first one and not checking further. */
4107 /* Don't use gfc_free_actual_arglist(). */
4108 free (actual
->next
);
4113 /* Change the expression node to a function call. */
4114 e
->expr_type
= EXPR_FUNCTION
;
4115 e
->symtree
= gfc_find_sym_in_symtree (sym
);
4116 e
->value
.function
.actual
= actual
;
4117 e
->value
.function
.esym
= NULL
;
4118 e
->value
.function
.isym
= NULL
;
4119 e
->value
.function
.name
= NULL
;
4120 e
->user_operator
= 1;
4122 if (!gfc_resolve_expr (e
))
4129 /* Tries to replace an assignment code node with a subroutine call to the
4130 subroutine associated with the assignment operator. Return true if the node
4131 was replaced. On false, no error is generated. */
4134 gfc_extend_assign (gfc_code
*c
, gfc_namespace
*ns
)
4136 gfc_actual_arglist
*actual
;
4137 gfc_expr
*lhs
, *rhs
, *tb_base
;
4138 gfc_symbol
*sym
= NULL
;
4139 const char *gname
= NULL
;
4140 gfc_typebound_proc
* tbo
;
4145 /* Don't allow an intrinsic assignment to be replaced. */
4146 if (lhs
->ts
.type
!= BT_DERIVED
&& lhs
->ts
.type
!= BT_CLASS
4147 && (rhs
->rank
== 0 || rhs
->rank
== lhs
->rank
)
4148 && (lhs
->ts
.type
== rhs
->ts
.type
4149 || (gfc_numeric_ts (&lhs
->ts
) && gfc_numeric_ts (&rhs
->ts
))))
4152 actual
= gfc_get_actual_arglist ();
4155 actual
->next
= gfc_get_actual_arglist ();
4156 actual
->next
->expr
= rhs
;
4158 /* TODO: Ambiguity-check, see above for gfc_extend_expr. */
4160 /* See if we find a matching type-bound assignment. */
4161 tbo
= matching_typebound_op (&tb_base
, actual
, INTRINSIC_ASSIGN
,
4166 /* Success: Replace the expression with a type-bound call. */
4167 gcc_assert (tb_base
);
4168 c
->expr1
= gfc_get_expr ();
4169 build_compcall_for_operator (c
->expr1
, actual
, tb_base
, tbo
, gname
);
4170 c
->expr1
->value
.compcall
.assign
= 1;
4171 c
->expr1
->where
= c
->loc
;
4173 c
->op
= EXEC_COMPCALL
;
4177 /* See if we find an 'ordinary' (non-typebound) assignment procedure. */
4178 for (; ns
; ns
= ns
->parent
)
4180 sym
= gfc_search_interface (ns
->op
[INTRINSIC_ASSIGN
], 1, &actual
);
4187 /* Success: Replace the assignment with the call. */
4188 c
->op
= EXEC_ASSIGN_CALL
;
4189 c
->symtree
= gfc_find_sym_in_symtree (sym
);
4192 c
->ext
.actual
= actual
;
4196 /* Failure: No assignment procedure found. */
4197 free (actual
->next
);
4203 /* Make sure that the interface just parsed is not already present in
4204 the given interface list. Ambiguity isn't checked yet since module
4205 procedures can be present without interfaces. */
4208 gfc_check_new_interface (gfc_interface
*base
, gfc_symbol
*new_sym
, locus loc
)
4212 for (ip
= base
; ip
; ip
= ip
->next
)
4214 if (ip
->sym
== new_sym
)
4216 gfc_error ("Entity %qs at %L is already present in the interface",
4217 new_sym
->name
, &loc
);
4226 /* Add a symbol to the current interface. */
4229 gfc_add_interface (gfc_symbol
*new_sym
)
4231 gfc_interface
**head
, *intr
;
4235 switch (current_interface
.type
)
4237 case INTERFACE_NAMELESS
:
4238 case INTERFACE_ABSTRACT
:
4241 case INTERFACE_INTRINSIC_OP
:
4242 for (ns
= current_interface
.ns
; ns
; ns
= ns
->parent
)
4243 switch (current_interface
.op
)
4246 case INTRINSIC_EQ_OS
:
4247 if (!gfc_check_new_interface (ns
->op
[INTRINSIC_EQ
], new_sym
,
4249 || !gfc_check_new_interface (ns
->op
[INTRINSIC_EQ_OS
],
4250 new_sym
, gfc_current_locus
))
4255 case INTRINSIC_NE_OS
:
4256 if (!gfc_check_new_interface (ns
->op
[INTRINSIC_NE
], new_sym
,
4258 || !gfc_check_new_interface (ns
->op
[INTRINSIC_NE_OS
],
4259 new_sym
, gfc_current_locus
))
4264 case INTRINSIC_GT_OS
:
4265 if (!gfc_check_new_interface (ns
->op
[INTRINSIC_GT
],
4266 new_sym
, gfc_current_locus
)
4267 || !gfc_check_new_interface (ns
->op
[INTRINSIC_GT_OS
],
4268 new_sym
, gfc_current_locus
))
4273 case INTRINSIC_GE_OS
:
4274 if (!gfc_check_new_interface (ns
->op
[INTRINSIC_GE
],
4275 new_sym
, gfc_current_locus
)
4276 || !gfc_check_new_interface (ns
->op
[INTRINSIC_GE_OS
],
4277 new_sym
, gfc_current_locus
))
4282 case INTRINSIC_LT_OS
:
4283 if (!gfc_check_new_interface (ns
->op
[INTRINSIC_LT
],
4284 new_sym
, gfc_current_locus
)
4285 || !gfc_check_new_interface (ns
->op
[INTRINSIC_LT_OS
],
4286 new_sym
, gfc_current_locus
))
4291 case INTRINSIC_LE_OS
:
4292 if (!gfc_check_new_interface (ns
->op
[INTRINSIC_LE
],
4293 new_sym
, gfc_current_locus
)
4294 || !gfc_check_new_interface (ns
->op
[INTRINSIC_LE_OS
],
4295 new_sym
, gfc_current_locus
))
4300 if (!gfc_check_new_interface (ns
->op
[current_interface
.op
],
4301 new_sym
, gfc_current_locus
))
4305 head
= ¤t_interface
.ns
->op
[current_interface
.op
];
4308 case INTERFACE_GENERIC
:
4309 case INTERFACE_DTIO
:
4310 for (ns
= current_interface
.ns
; ns
; ns
= ns
->parent
)
4312 gfc_find_symbol (current_interface
.sym
->name
, ns
, 0, &sym
);
4316 if (!gfc_check_new_interface (sym
->generic
,
4317 new_sym
, gfc_current_locus
))
4321 head
= ¤t_interface
.sym
->generic
;
4324 case INTERFACE_USER_OP
:
4325 if (!gfc_check_new_interface (current_interface
.uop
->op
,
4326 new_sym
, gfc_current_locus
))
4329 head
= ¤t_interface
.uop
->op
;
4333 gfc_internal_error ("gfc_add_interface(): Bad interface type");
4336 intr
= gfc_get_interface ();
4337 intr
->sym
= new_sym
;
4338 intr
->where
= gfc_current_locus
;
4348 gfc_current_interface_head (void)
4350 switch (current_interface
.type
)
4352 case INTERFACE_INTRINSIC_OP
:
4353 return current_interface
.ns
->op
[current_interface
.op
];
4355 case INTERFACE_GENERIC
:
4356 case INTERFACE_DTIO
:
4357 return current_interface
.sym
->generic
;
4359 case INTERFACE_USER_OP
:
4360 return current_interface
.uop
->op
;
4369 gfc_set_current_interface_head (gfc_interface
*i
)
4371 switch (current_interface
.type
)
4373 case INTERFACE_INTRINSIC_OP
:
4374 current_interface
.ns
->op
[current_interface
.op
] = i
;
4377 case INTERFACE_GENERIC
:
4378 case INTERFACE_DTIO
:
4379 current_interface
.sym
->generic
= i
;
4382 case INTERFACE_USER_OP
:
4383 current_interface
.uop
->op
= i
;
4392 /* Gets rid of a formal argument list. We do not free symbols.
4393 Symbols are freed when a namespace is freed. */
4396 gfc_free_formal_arglist (gfc_formal_arglist
*p
)
4398 gfc_formal_arglist
*q
;
4408 /* Check that it is ok for the type-bound procedure 'proc' to override the
4409 procedure 'old', cf. F08:4.5.7.3. */
4412 gfc_check_typebound_override (gfc_symtree
* proc
, gfc_symtree
* old
)
4415 gfc_symbol
*proc_target
, *old_target
;
4416 unsigned proc_pass_arg
, old_pass_arg
, argpos
;
4417 gfc_formal_arglist
*proc_formal
, *old_formal
;
4421 /* This procedure should only be called for non-GENERIC proc. */
4422 gcc_assert (!proc
->n
.tb
->is_generic
);
4424 /* If the overwritten procedure is GENERIC, this is an error. */
4425 if (old
->n
.tb
->is_generic
)
4427 gfc_error ("Can't overwrite GENERIC %qs at %L",
4428 old
->name
, &proc
->n
.tb
->where
);
4432 where
= proc
->n
.tb
->where
;
4433 proc_target
= proc
->n
.tb
->u
.specific
->n
.sym
;
4434 old_target
= old
->n
.tb
->u
.specific
->n
.sym
;
4436 /* Check that overridden binding is not NON_OVERRIDABLE. */
4437 if (old
->n
.tb
->non_overridable
)
4439 gfc_error ("%qs at %L overrides a procedure binding declared"
4440 " NON_OVERRIDABLE", proc
->name
, &where
);
4444 /* It's an error to override a non-DEFERRED procedure with a DEFERRED one. */
4445 if (!old
->n
.tb
->deferred
&& proc
->n
.tb
->deferred
)
4447 gfc_error ("%qs at %L must not be DEFERRED as it overrides a"
4448 " non-DEFERRED binding", proc
->name
, &where
);
4452 /* If the overridden binding is PURE, the overriding must be, too. */
4453 if (old_target
->attr
.pure
&& !proc_target
->attr
.pure
)
4455 gfc_error ("%qs at %L overrides a PURE procedure and must also be PURE",
4456 proc
->name
, &where
);
4460 /* If the overridden binding is ELEMENTAL, the overriding must be, too. If it
4461 is not, the overriding must not be either. */
4462 if (old_target
->attr
.elemental
&& !proc_target
->attr
.elemental
)
4464 gfc_error ("%qs at %L overrides an ELEMENTAL procedure and must also be"
4465 " ELEMENTAL", proc
->name
, &where
);
4468 if (!old_target
->attr
.elemental
&& proc_target
->attr
.elemental
)
4470 gfc_error ("%qs at %L overrides a non-ELEMENTAL procedure and must not"
4471 " be ELEMENTAL, either", proc
->name
, &where
);
4475 /* If the overridden binding is a SUBROUTINE, the overriding must also be a
4477 if (old_target
->attr
.subroutine
&& !proc_target
->attr
.subroutine
)
4479 gfc_error ("%qs at %L overrides a SUBROUTINE and must also be a"
4480 " SUBROUTINE", proc
->name
, &where
);
4484 /* If the overridden binding is a FUNCTION, the overriding must also be a
4485 FUNCTION and have the same characteristics. */
4486 if (old_target
->attr
.function
)
4488 if (!proc_target
->attr
.function
)
4490 gfc_error ("%qs at %L overrides a FUNCTION and must also be a"
4491 " FUNCTION", proc
->name
, &where
);
4495 if (!gfc_check_result_characteristics (proc_target
, old_target
,
4498 gfc_error ("Result mismatch for the overriding procedure "
4499 "%qs at %L: %s", proc
->name
, &where
, err
);
4504 /* If the overridden binding is PUBLIC, the overriding one must not be
4506 if (old
->n
.tb
->access
== ACCESS_PUBLIC
4507 && proc
->n
.tb
->access
== ACCESS_PRIVATE
)
4509 gfc_error ("%qs at %L overrides a PUBLIC procedure and must not be"
4510 " PRIVATE", proc
->name
, &where
);
4514 /* Compare the formal argument lists of both procedures. This is also abused
4515 to find the position of the passed-object dummy arguments of both
4516 bindings as at least the overridden one might not yet be resolved and we
4517 need those positions in the check below. */
4518 proc_pass_arg
= old_pass_arg
= 0;
4519 if (!proc
->n
.tb
->nopass
&& !proc
->n
.tb
->pass_arg
)
4521 if (!old
->n
.tb
->nopass
&& !old
->n
.tb
->pass_arg
)
4524 proc_formal
= gfc_sym_get_dummy_args (proc_target
);
4525 old_formal
= gfc_sym_get_dummy_args (old_target
);
4526 for ( ; proc_formal
&& old_formal
;
4527 proc_formal
= proc_formal
->next
, old_formal
= old_formal
->next
)
4529 if (proc
->n
.tb
->pass_arg
4530 && !strcmp (proc
->n
.tb
->pass_arg
, proc_formal
->sym
->name
))
4531 proc_pass_arg
= argpos
;
4532 if (old
->n
.tb
->pass_arg
4533 && !strcmp (old
->n
.tb
->pass_arg
, old_formal
->sym
->name
))
4534 old_pass_arg
= argpos
;
4536 /* Check that the names correspond. */
4537 if (strcmp (proc_formal
->sym
->name
, old_formal
->sym
->name
))
4539 gfc_error ("Dummy argument %qs of %qs at %L should be named %qs as"
4540 " to match the corresponding argument of the overridden"
4541 " procedure", proc_formal
->sym
->name
, proc
->name
, &where
,
4542 old_formal
->sym
->name
);
4546 check_type
= proc_pass_arg
!= argpos
&& old_pass_arg
!= argpos
;
4547 if (!gfc_check_dummy_characteristics (proc_formal
->sym
, old_formal
->sym
,
4548 check_type
, err
, sizeof(err
)))
4550 gfc_error ("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 gfc_interface
*intr
;
4937 for (intr
= tb_io_st
->n
.sym
->generic
; intr
; intr
= intr
->next
)
4939 gfc_symbol
*fsym
= intr
->sym
->formal
->sym
;
4940 if (intr
->sym
&& intr
->sym
->formal
4941 && ((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
);