1 /* Deal with interfaces.
2 Copyright (C) 2000-2018 Free Software Foundation, Inc.
3 Contributed by Andy Vaught
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
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 %qs", 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
))
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 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
))
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 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
)
649 && !(derived1
->attr
.pdt_type
&& derived2
->attr
.pdt_type
))
652 /* Protect against null components. */
653 if (derived1
->attr
.zero_comp
!= derived2
->attr
.zero_comp
)
656 if (derived1
->attr
.zero_comp
)
659 cmp1
= derived1
->components
;
660 cmp2
= derived2
->components
;
662 /* Since subtypes of SEQUENCE types must be SEQUENCE types as well, a
663 simple test can speed things up. Otherwise, lots of things have to
667 if (!compare_components (cmp1
, cmp2
, derived1
, derived2
))
673 if (cmp1
== NULL
&& cmp2
== NULL
)
675 if (cmp1
== NULL
|| cmp2
== NULL
)
683 /* Compare two typespecs, recursively if necessary. */
686 gfc_compare_types (gfc_typespec
*ts1
, gfc_typespec
*ts2
)
688 /* See if one of the typespecs is a BT_VOID, which is what is being used
689 to allow the funcs like c_f_pointer to accept any pointer type.
690 TODO: Possibly should narrow this to just the one typespec coming in
691 that is for the formal arg, but oh well. */
692 if (ts1
->type
== BT_VOID
|| ts2
->type
== BT_VOID
)
695 /* The _data component is not always present, therefore check for its
696 presence before assuming, that its derived->attr is available.
697 When the _data component is not present, then nevertheless the
698 unlimited_polymorphic flag may be set in the derived type's attr. */
699 if (ts1
->type
== BT_CLASS
&& ts1
->u
.derived
->components
700 && ((ts1
->u
.derived
->attr
.is_class
701 && ts1
->u
.derived
->components
->ts
.u
.derived
->attr
702 .unlimited_polymorphic
)
703 || ts1
->u
.derived
->attr
.unlimited_polymorphic
))
707 if (ts2
->type
== BT_CLASS
&& ts1
->type
== BT_DERIVED
708 && ts2
->u
.derived
->components
709 && ((ts2
->u
.derived
->attr
.is_class
710 && ts2
->u
.derived
->components
->ts
.u
.derived
->attr
711 .unlimited_polymorphic
)
712 || ts2
->u
.derived
->attr
.unlimited_polymorphic
)
713 && (ts1
->u
.derived
->attr
.sequence
|| ts1
->u
.derived
->attr
.is_bind_c
))
716 if (ts1
->type
!= ts2
->type
717 && ((ts1
->type
!= BT_DERIVED
&& ts1
->type
!= BT_CLASS
)
718 || (ts2
->type
!= BT_DERIVED
&& ts2
->type
!= BT_CLASS
)))
721 if (ts1
->type
== BT_UNION
)
722 return compare_union_types (ts1
->u
.derived
, ts2
->u
.derived
);
724 if (ts1
->type
!= BT_DERIVED
&& ts1
->type
!= BT_CLASS
)
725 return (ts1
->kind
== ts2
->kind
);
727 /* Compare derived types. */
728 return gfc_type_compatible (ts1
, ts2
);
733 compare_type (gfc_symbol
*s1
, gfc_symbol
*s2
)
735 if (s2
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
738 /* TYPE and CLASS of the same declared type are type compatible,
739 but have different characteristics. */
740 if ((s1
->ts
.type
== BT_CLASS
&& s2
->ts
.type
== BT_DERIVED
)
741 || (s1
->ts
.type
== BT_DERIVED
&& s2
->ts
.type
== BT_CLASS
))
744 return gfc_compare_types (&s1
->ts
, &s2
->ts
) || s2
->ts
.type
== BT_ASSUMED
;
749 compare_rank (gfc_symbol
*s1
, gfc_symbol
*s2
)
751 gfc_array_spec
*as1
, *as2
;
754 if (s2
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
757 as1
= (s1
->ts
.type
== BT_CLASS
758 && !s1
->ts
.u
.derived
->attr
.unlimited_polymorphic
)
759 ? CLASS_DATA (s1
)->as
: s1
->as
;
760 as2
= (s2
->ts
.type
== BT_CLASS
761 && !s2
->ts
.u
.derived
->attr
.unlimited_polymorphic
)
762 ? CLASS_DATA (s2
)->as
: s2
->as
;
764 r1
= as1
? as1
->rank
: 0;
765 r2
= as2
? as2
->rank
: 0;
767 if (r1
!= r2
&& (!as2
|| as2
->type
!= AS_ASSUMED_RANK
))
768 return false; /* Ranks differ. */
774 /* Given two symbols that are formal arguments, compare their ranks
775 and types. Returns true if they have the same rank and type,
779 compare_type_rank (gfc_symbol
*s1
, gfc_symbol
*s2
)
781 return compare_type (s1
, s2
) && compare_rank (s1
, s2
);
785 /* Given two symbols that are formal arguments, compare their types
786 and rank and their formal interfaces if they are both dummy
787 procedures. Returns true if the same, false if different. */
790 compare_type_rank_if (gfc_symbol
*s1
, gfc_symbol
*s2
)
792 if (s1
== NULL
|| s2
== NULL
)
798 if (s1
->attr
.flavor
!= FL_PROCEDURE
&& s2
->attr
.flavor
!= FL_PROCEDURE
)
799 return compare_type_rank (s1
, s2
);
801 if (s1
->attr
.flavor
!= FL_PROCEDURE
|| s2
->attr
.flavor
!= FL_PROCEDURE
)
804 /* At this point, both symbols are procedures. It can happen that
805 external procedures are compared, where one is identified by usage
806 to be a function or subroutine but the other is not. Check TKR
807 nonetheless for these cases. */
808 if (s1
->attr
.function
== 0 && s1
->attr
.subroutine
== 0)
809 return s1
->attr
.external
? compare_type_rank (s1
, s2
) : false;
811 if (s2
->attr
.function
== 0 && s2
->attr
.subroutine
== 0)
812 return s2
->attr
.external
? compare_type_rank (s1
, s2
) : false;
814 /* Now the type of procedure has been identified. */
815 if (s1
->attr
.function
!= s2
->attr
.function
816 || s1
->attr
.subroutine
!= s2
->attr
.subroutine
)
819 if (s1
->attr
.function
&& !compare_type_rank (s1
, s2
))
822 /* Originally, gfortran recursed here to check the interfaces of passed
823 procedures. This is explicitly not required by the standard. */
828 /* Given a formal argument list and a keyword name, search the list
829 for that keyword. Returns the correct symbol node if found, NULL
833 find_keyword_arg (const char *name
, gfc_formal_arglist
*f
)
835 for (; f
; f
= f
->next
)
836 if (strcmp (f
->sym
->name
, name
) == 0)
843 /******** Interface checking subroutines **********/
846 /* Given an operator interface and the operator, make sure that all
847 interfaces for that operator are legal. */
850 gfc_check_operator_interface (gfc_symbol
*sym
, gfc_intrinsic_op op
,
853 gfc_formal_arglist
*formal
;
856 int args
, r1
, r2
, k1
, k2
;
861 t1
= t2
= BT_UNKNOWN
;
862 i1
= i2
= INTENT_UNKNOWN
;
866 for (formal
= gfc_sym_get_dummy_args (sym
); formal
; formal
= formal
->next
)
868 gfc_symbol
*fsym
= formal
->sym
;
871 gfc_error ("Alternate return cannot appear in operator "
872 "interface at %L", &sym
->declared_at
);
878 i1
= fsym
->attr
.intent
;
879 r1
= (fsym
->as
!= NULL
) ? fsym
->as
->rank
: 0;
885 i2
= fsym
->attr
.intent
;
886 r2
= (fsym
->as
!= NULL
) ? fsym
->as
->rank
: 0;
892 /* Only +, - and .not. can be unary operators.
893 .not. cannot be a binary operator. */
894 if (args
== 0 || args
> 2 || (args
== 1 && op
!= INTRINSIC_PLUS
895 && op
!= INTRINSIC_MINUS
896 && op
!= INTRINSIC_NOT
)
897 || (args
== 2 && op
== INTRINSIC_NOT
))
899 if (op
== INTRINSIC_ASSIGN
)
900 gfc_error ("Assignment operator interface at %L must have "
901 "two arguments", &sym
->declared_at
);
903 gfc_error ("Operator interface at %L has the wrong number of arguments",
908 /* Check that intrinsics are mapped to functions, except
909 INTRINSIC_ASSIGN which should map to a subroutine. */
910 if (op
== INTRINSIC_ASSIGN
)
912 gfc_formal_arglist
*dummy_args
;
914 if (!sym
->attr
.subroutine
)
916 gfc_error ("Assignment operator interface at %L must be "
917 "a SUBROUTINE", &sym
->declared_at
);
921 /* Allowed are (per F2003, 12.3.2.1.2 Defined assignments):
922 - First argument an array with different rank than second,
923 - First argument is a scalar and second an array,
924 - Types and kinds do not conform, or
925 - First argument is of derived type. */
926 dummy_args
= gfc_sym_get_dummy_args (sym
);
927 if (dummy_args
->sym
->ts
.type
!= BT_DERIVED
928 && dummy_args
->sym
->ts
.type
!= BT_CLASS
929 && (r2
== 0 || r1
== r2
)
930 && (dummy_args
->sym
->ts
.type
== dummy_args
->next
->sym
->ts
.type
931 || (gfc_numeric_ts (&dummy_args
->sym
->ts
)
932 && gfc_numeric_ts (&dummy_args
->next
->sym
->ts
))))
934 gfc_error ("Assignment operator interface at %L must not redefine "
935 "an INTRINSIC type assignment", &sym
->declared_at
);
941 if (!sym
->attr
.function
)
943 gfc_error ("Intrinsic operator interface at %L must be a FUNCTION",
949 /* Check intents on operator interfaces. */
950 if (op
== INTRINSIC_ASSIGN
)
952 if (i1
!= INTENT_OUT
&& i1
!= INTENT_INOUT
)
954 gfc_error ("First argument of defined assignment at %L must be "
955 "INTENT(OUT) or INTENT(INOUT)", &sym
->declared_at
);
961 gfc_error ("Second argument of defined assignment at %L must be "
962 "INTENT(IN)", &sym
->declared_at
);
970 gfc_error ("First argument of operator interface at %L must be "
971 "INTENT(IN)", &sym
->declared_at
);
975 if (args
== 2 && i2
!= INTENT_IN
)
977 gfc_error ("Second argument of operator interface at %L must be "
978 "INTENT(IN)", &sym
->declared_at
);
983 /* From now on, all we have to do is check that the operator definition
984 doesn't conflict with an intrinsic operator. The rules for this
985 game are defined in 7.1.2 and 7.1.3 of both F95 and F2003 standards,
986 as well as 12.3.2.1.1 of Fortran 2003:
988 "If the operator is an intrinsic-operator (R310), the number of
989 function arguments shall be consistent with the intrinsic uses of
990 that operator, and the types, kind type parameters, or ranks of the
991 dummy arguments shall differ from those required for the intrinsic
992 operation (7.1.2)." */
994 #define IS_NUMERIC_TYPE(t) \
995 ((t) == BT_INTEGER || (t) == BT_REAL || (t) == BT_COMPLEX)
997 /* Unary ops are easy, do them first. */
998 if (op
== INTRINSIC_NOT
)
1000 if (t1
== BT_LOGICAL
)
1006 if (args
== 1 && (op
== INTRINSIC_PLUS
|| op
== INTRINSIC_MINUS
))
1008 if (IS_NUMERIC_TYPE (t1
))
1014 /* Character intrinsic operators have same character kind, thus
1015 operator definitions with operands of different character kinds
1017 if (t1
== BT_CHARACTER
&& t2
== BT_CHARACTER
&& k1
!= k2
)
1020 /* Intrinsic operators always perform on arguments of same rank,
1021 so different ranks is also always safe. (rank == 0) is an exception
1022 to that, because all intrinsic operators are elemental. */
1023 if (r1
!= r2
&& r1
!= 0 && r2
!= 0)
1029 case INTRINSIC_EQ_OS
:
1031 case INTRINSIC_NE_OS
:
1032 if (t1
== BT_CHARACTER
&& t2
== BT_CHARACTER
)
1036 case INTRINSIC_PLUS
:
1037 case INTRINSIC_MINUS
:
1038 case INTRINSIC_TIMES
:
1039 case INTRINSIC_DIVIDE
:
1040 case INTRINSIC_POWER
:
1041 if (IS_NUMERIC_TYPE (t1
) && IS_NUMERIC_TYPE (t2
))
1046 case INTRINSIC_GT_OS
:
1048 case INTRINSIC_GE_OS
:
1050 case INTRINSIC_LT_OS
:
1052 case INTRINSIC_LE_OS
:
1053 if (t1
== BT_CHARACTER
&& t2
== BT_CHARACTER
)
1055 if ((t1
== BT_INTEGER
|| t1
== BT_REAL
)
1056 && (t2
== BT_INTEGER
|| t2
== BT_REAL
))
1060 case INTRINSIC_CONCAT
:
1061 if (t1
== BT_CHARACTER
&& t2
== BT_CHARACTER
)
1068 case INTRINSIC_NEQV
:
1069 if (t1
== BT_LOGICAL
&& t2
== BT_LOGICAL
)
1079 #undef IS_NUMERIC_TYPE
1082 gfc_error ("Operator interface at %L conflicts with intrinsic interface",
1088 /* Given a pair of formal argument lists, we see if the two lists can
1089 be distinguished by counting the number of nonoptional arguments of
1090 a given type/rank in f1 and seeing if there are less then that
1091 number of those arguments in f2 (including optional arguments).
1092 Since this test is asymmetric, it has to be called twice to make it
1093 symmetric. Returns nonzero if the argument lists are incompatible
1094 by this test. This subroutine implements rule 1 of section F03:16.2.3.
1095 'p1' and 'p2' are the PASS arguments of both procedures (if applicable). */
1098 count_types_test (gfc_formal_arglist
*f1
, gfc_formal_arglist
*f2
,
1099 const char *p1
, const char *p2
)
1101 int ac1
, ac2
, i
, j
, k
, n1
;
1102 gfc_formal_arglist
*f
;
1115 for (f
= f1
; f
; f
= f
->next
)
1118 /* Build an array of integers that gives the same integer to
1119 arguments of the same type/rank. */
1120 arg
= XCNEWVEC (arginfo
, n1
);
1123 for (i
= 0; i
< n1
; i
++, f
= f
->next
)
1126 arg
[i
].sym
= f
->sym
;
1131 for (i
= 0; i
< n1
; i
++)
1133 if (arg
[i
].flag
!= -1)
1136 if (arg
[i
].sym
&& (arg
[i
].sym
->attr
.optional
1137 || (p1
&& strcmp (arg
[i
].sym
->name
, p1
) == 0)))
1138 continue; /* Skip OPTIONAL and PASS arguments. */
1142 /* Find other non-optional, non-pass arguments of the same type/rank. */
1143 for (j
= i
+ 1; j
< n1
; j
++)
1144 if ((arg
[j
].sym
== NULL
1145 || !(arg
[j
].sym
->attr
.optional
1146 || (p1
&& strcmp (arg
[j
].sym
->name
, p1
) == 0)))
1147 && (compare_type_rank_if (arg
[i
].sym
, arg
[j
].sym
)
1148 || compare_type_rank_if (arg
[j
].sym
, arg
[i
].sym
)))
1154 /* Now loop over each distinct type found in f1. */
1158 for (i
= 0; i
< n1
; i
++)
1160 if (arg
[i
].flag
!= k
)
1164 for (j
= i
+ 1; j
< n1
; j
++)
1165 if (arg
[j
].flag
== k
)
1168 /* Count the number of non-pass arguments in f2 with that type,
1169 including those that are optional. */
1172 for (f
= f2
; f
; f
= f
->next
)
1173 if ((!p2
|| strcmp (f
->sym
->name
, p2
) != 0)
1174 && (compare_type_rank_if (arg
[i
].sym
, f
->sym
)
1175 || compare_type_rank_if (f
->sym
, arg
[i
].sym
)))
1193 /* Returns true if two dummy arguments are distinguishable due to their POINTER
1194 and ALLOCATABLE attributes according to F2018 section 15.4.3.4.5 (3).
1195 The function is asymmetric wrt to the arguments s1 and s2 and should always
1196 be called twice (with flipped arguments in the second call). */
1199 compare_ptr_alloc(gfc_symbol
*s1
, gfc_symbol
*s2
)
1201 /* Is s1 allocatable? */
1202 const bool a1
= s1
->ts
.type
== BT_CLASS
?
1203 CLASS_DATA(s1
)->attr
.allocatable
: s1
->attr
.allocatable
;
1204 /* Is s2 a pointer? */
1205 const bool p2
= s2
->ts
.type
== BT_CLASS
?
1206 CLASS_DATA(s2
)->attr
.class_pointer
: s2
->attr
.pointer
;
1207 return a1
&& p2
&& (s2
->attr
.intent
!= INTENT_IN
);
1211 /* Perform the correspondence test in rule (3) of F08:C1215.
1212 Returns zero if no argument is found that satisfies this rule,
1213 nonzero otherwise. 'p1' and 'p2' are the PASS arguments of both procedures
1216 This test is also not symmetric in f1 and f2 and must be called
1217 twice. This test finds problems caused by sorting the actual
1218 argument list with keywords. For example:
1222 INTEGER :: A ; REAL :: B
1226 INTEGER :: A ; REAL :: B
1230 At this point, 'CALL FOO(A=1, B=1.0)' is ambiguous. */
1233 generic_correspondence (gfc_formal_arglist
*f1
, gfc_formal_arglist
*f2
,
1234 const char *p1
, const char *p2
)
1236 gfc_formal_arglist
*f2_save
, *g
;
1243 if (f1
->sym
->attr
.optional
)
1246 if (p1
&& strcmp (f1
->sym
->name
, p1
) == 0)
1248 if (f2
&& p2
&& strcmp (f2
->sym
->name
, p2
) == 0)
1251 if (f2
!= NULL
&& (compare_type_rank (f1
->sym
, f2
->sym
)
1252 || compare_type_rank (f2
->sym
, f1
->sym
))
1253 && !((gfc_option
.allow_std
& GFC_STD_F2008
)
1254 && (compare_ptr_alloc(f1
->sym
, f2
->sym
)
1255 || compare_ptr_alloc(f2
->sym
, f1
->sym
))))
1258 /* Now search for a disambiguating keyword argument starting at
1259 the current non-match. */
1260 for (g
= f1
; g
; g
= g
->next
)
1262 if (g
->sym
->attr
.optional
|| (p1
&& strcmp (g
->sym
->name
, p1
) == 0))
1265 sym
= find_keyword_arg (g
->sym
->name
, f2_save
);
1266 if (sym
== NULL
|| !compare_type_rank (g
->sym
, sym
)
1267 || ((gfc_option
.allow_std
& GFC_STD_F2008
)
1268 && (compare_ptr_alloc(sym
, g
->sym
)
1269 || compare_ptr_alloc(g
->sym
, sym
))))
1285 symbol_rank (gfc_symbol
*sym
)
1287 gfc_array_spec
*as
= NULL
;
1289 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
))
1290 as
= CLASS_DATA (sym
)->as
;
1294 return as
? as
->rank
: 0;
1298 /* Check if the characteristics of two dummy arguments match,
1302 gfc_check_dummy_characteristics (gfc_symbol
*s1
, gfc_symbol
*s2
,
1303 bool type_must_agree
, char *errmsg
,
1306 if (s1
== NULL
|| s2
== NULL
)
1307 return s1
== s2
? true : false;
1309 /* Check type and rank. */
1310 if (type_must_agree
)
1312 if (!compare_type (s1
, s2
) || !compare_type (s2
, s1
))
1314 snprintf (errmsg
, err_len
, "Type mismatch in argument '%s' (%s/%s)",
1315 s1
->name
, gfc_typename (&s1
->ts
), gfc_typename (&s2
->ts
));
1318 if (!compare_rank (s1
, s2
))
1320 snprintf (errmsg
, err_len
, "Rank mismatch in argument '%s' (%i/%i)",
1321 s1
->name
, symbol_rank (s1
), symbol_rank (s2
));
1327 if (s1
->attr
.intent
!= s2
->attr
.intent
)
1329 snprintf (errmsg
, err_len
, "INTENT mismatch in argument '%s'",
1334 /* Check OPTIONAL attribute. */
1335 if (s1
->attr
.optional
!= s2
->attr
.optional
)
1337 snprintf (errmsg
, err_len
, "OPTIONAL mismatch in argument '%s'",
1342 /* Check ALLOCATABLE attribute. */
1343 if (s1
->attr
.allocatable
!= s2
->attr
.allocatable
)
1345 snprintf (errmsg
, err_len
, "ALLOCATABLE mismatch in argument '%s'",
1350 /* Check POINTER attribute. */
1351 if (s1
->attr
.pointer
!= s2
->attr
.pointer
)
1353 snprintf (errmsg
, err_len
, "POINTER mismatch in argument '%s'",
1358 /* Check TARGET attribute. */
1359 if (s1
->attr
.target
!= s2
->attr
.target
)
1361 snprintf (errmsg
, err_len
, "TARGET mismatch in argument '%s'",
1366 /* Check ASYNCHRONOUS attribute. */
1367 if (s1
->attr
.asynchronous
!= s2
->attr
.asynchronous
)
1369 snprintf (errmsg
, err_len
, "ASYNCHRONOUS mismatch in argument '%s'",
1374 /* Check CONTIGUOUS attribute. */
1375 if (s1
->attr
.contiguous
!= s2
->attr
.contiguous
)
1377 snprintf (errmsg
, err_len
, "CONTIGUOUS mismatch in argument '%s'",
1382 /* Check VALUE attribute. */
1383 if (s1
->attr
.value
!= s2
->attr
.value
)
1385 snprintf (errmsg
, err_len
, "VALUE mismatch in argument '%s'",
1390 /* Check VOLATILE attribute. */
1391 if (s1
->attr
.volatile_
!= s2
->attr
.volatile_
)
1393 snprintf (errmsg
, err_len
, "VOLATILE mismatch in argument '%s'",
1398 /* Check interface of dummy procedures. */
1399 if (s1
->attr
.flavor
== FL_PROCEDURE
)
1402 if (!gfc_compare_interfaces (s1
, s2
, s2
->name
, 0, 1, err
, sizeof(err
),
1405 snprintf (errmsg
, err_len
, "Interface mismatch in dummy procedure "
1406 "'%s': %s", s1
->name
, err
);
1411 /* Check string length. */
1412 if (s1
->ts
.type
== BT_CHARACTER
1413 && s1
->ts
.u
.cl
&& s1
->ts
.u
.cl
->length
1414 && s2
->ts
.u
.cl
&& s2
->ts
.u
.cl
->length
)
1416 int compval
= gfc_dep_compare_expr (s1
->ts
.u
.cl
->length
,
1417 s2
->ts
.u
.cl
->length
);
1423 snprintf (errmsg
, err_len
, "Character length mismatch "
1424 "in argument '%s'", s1
->name
);
1428 /* FIXME: Implement a warning for this case.
1429 gfc_warning (0, "Possible character length mismatch in argument %qs",
1437 gfc_internal_error ("check_dummy_characteristics: Unexpected result "
1438 "%i of gfc_dep_compare_expr", compval
);
1443 /* Check array shape. */
1444 if (s1
->as
&& s2
->as
)
1447 gfc_expr
*shape1
, *shape2
;
1449 if (s1
->as
->type
!= s2
->as
->type
)
1451 snprintf (errmsg
, err_len
, "Shape mismatch in argument '%s'",
1456 if (s1
->as
->corank
!= s2
->as
->corank
)
1458 snprintf (errmsg
, err_len
, "Corank mismatch in argument '%s' (%i/%i)",
1459 s1
->name
, s1
->as
->corank
, s2
->as
->corank
);
1463 if (s1
->as
->type
== AS_EXPLICIT
)
1464 for (i
= 0; i
< s1
->as
->rank
+ MAX (0, s1
->as
->corank
-1); i
++)
1466 shape1
= gfc_subtract (gfc_copy_expr (s1
->as
->upper
[i
]),
1467 gfc_copy_expr (s1
->as
->lower
[i
]));
1468 shape2
= gfc_subtract (gfc_copy_expr (s2
->as
->upper
[i
]),
1469 gfc_copy_expr (s2
->as
->lower
[i
]));
1470 compval
= gfc_dep_compare_expr (shape1
, shape2
);
1471 gfc_free_expr (shape1
);
1472 gfc_free_expr (shape2
);
1478 if (i
< s1
->as
->rank
)
1479 snprintf (errmsg
, err_len
, "Shape mismatch in dimension %i of"
1480 " argument '%s'", i
+ 1, s1
->name
);
1482 snprintf (errmsg
, err_len
, "Shape mismatch in codimension %i "
1483 "of argument '%s'", i
- s1
->as
->rank
+ 1, s1
->name
);
1487 /* FIXME: Implement a warning for this case.
1488 gfc_warning (0, "Possible shape mismatch in argument %qs",
1496 gfc_internal_error ("check_dummy_characteristics: Unexpected "
1497 "result %i of gfc_dep_compare_expr",
1508 /* Check if the characteristics of two function results match,
1512 gfc_check_result_characteristics (gfc_symbol
*s1
, gfc_symbol
*s2
,
1513 char *errmsg
, int err_len
)
1515 gfc_symbol
*r1
, *r2
;
1517 if (s1
->ts
.interface
&& s1
->ts
.interface
->result
)
1518 r1
= s1
->ts
.interface
->result
;
1520 r1
= s1
->result
? s1
->result
: s1
;
1522 if (s2
->ts
.interface
&& s2
->ts
.interface
->result
)
1523 r2
= s2
->ts
.interface
->result
;
1525 r2
= s2
->result
? s2
->result
: s2
;
1527 if (r1
->ts
.type
== BT_UNKNOWN
)
1530 /* Check type and rank. */
1531 if (!compare_type (r1
, r2
))
1533 snprintf (errmsg
, err_len
, "Type mismatch in function result (%s/%s)",
1534 gfc_typename (&r1
->ts
), gfc_typename (&r2
->ts
));
1537 if (!compare_rank (r1
, r2
))
1539 snprintf (errmsg
, err_len
, "Rank mismatch in function result (%i/%i)",
1540 symbol_rank (r1
), symbol_rank (r2
));
1544 /* Check ALLOCATABLE attribute. */
1545 if (r1
->attr
.allocatable
!= r2
->attr
.allocatable
)
1547 snprintf (errmsg
, err_len
, "ALLOCATABLE attribute mismatch in "
1552 /* Check POINTER attribute. */
1553 if (r1
->attr
.pointer
!= r2
->attr
.pointer
)
1555 snprintf (errmsg
, err_len
, "POINTER attribute mismatch in "
1560 /* Check CONTIGUOUS attribute. */
1561 if (r1
->attr
.contiguous
!= r2
->attr
.contiguous
)
1563 snprintf (errmsg
, err_len
, "CONTIGUOUS attribute mismatch in "
1568 /* Check PROCEDURE POINTER attribute. */
1569 if (r1
!= s1
&& r1
->attr
.proc_pointer
!= r2
->attr
.proc_pointer
)
1571 snprintf (errmsg
, err_len
, "PROCEDURE POINTER mismatch in "
1576 /* Check string length. */
1577 if (r1
->ts
.type
== BT_CHARACTER
&& r1
->ts
.u
.cl
&& r2
->ts
.u
.cl
)
1579 if (r1
->ts
.deferred
!= r2
->ts
.deferred
)
1581 snprintf (errmsg
, err_len
, "Character length mismatch "
1582 "in function result");
1586 if (r1
->ts
.u
.cl
->length
&& r2
->ts
.u
.cl
->length
)
1588 int compval
= gfc_dep_compare_expr (r1
->ts
.u
.cl
->length
,
1589 r2
->ts
.u
.cl
->length
);
1595 snprintf (errmsg
, err_len
, "Character length mismatch "
1596 "in function result");
1600 /* FIXME: Implement a warning for this case.
1601 snprintf (errmsg, err_len, "Possible character length mismatch "
1602 "in function result");*/
1609 gfc_internal_error ("check_result_characteristics (1): Unexpected "
1610 "result %i of gfc_dep_compare_expr", compval
);
1616 /* Check array shape. */
1617 if (!r1
->attr
.allocatable
&& !r1
->attr
.pointer
&& r1
->as
&& r2
->as
)
1620 gfc_expr
*shape1
, *shape2
;
1622 if (r1
->as
->type
!= r2
->as
->type
)
1624 snprintf (errmsg
, err_len
, "Shape mismatch in function result");
1628 if (r1
->as
->type
== AS_EXPLICIT
)
1629 for (i
= 0; i
< r1
->as
->rank
+ r1
->as
->corank
; i
++)
1631 shape1
= gfc_subtract (gfc_copy_expr (r1
->as
->upper
[i
]),
1632 gfc_copy_expr (r1
->as
->lower
[i
]));
1633 shape2
= gfc_subtract (gfc_copy_expr (r2
->as
->upper
[i
]),
1634 gfc_copy_expr (r2
->as
->lower
[i
]));
1635 compval
= gfc_dep_compare_expr (shape1
, shape2
);
1636 gfc_free_expr (shape1
);
1637 gfc_free_expr (shape2
);
1643 snprintf (errmsg
, err_len
, "Shape mismatch in dimension %i of "
1644 "function result", i
+ 1);
1648 /* FIXME: Implement a warning for this case.
1649 gfc_warning (0, "Possible shape mismatch in return value");*/
1656 gfc_internal_error ("check_result_characteristics (2): "
1657 "Unexpected result %i of "
1658 "gfc_dep_compare_expr", compval
);
1668 /* 'Compare' two formal interfaces associated with a pair of symbols.
1669 We return true if there exists an actual argument list that
1670 would be ambiguous between the two interfaces, zero otherwise.
1671 'strict_flag' specifies whether all the characteristics are
1672 required to match, which is not the case for ambiguity checks.
1673 'p1' and 'p2' are the PASS arguments of both procedures (if applicable). */
1676 gfc_compare_interfaces (gfc_symbol
*s1
, gfc_symbol
*s2
, const char *name2
,
1677 int generic_flag
, int strict_flag
,
1678 char *errmsg
, int err_len
,
1679 const char *p1
, const char *p2
)
1681 gfc_formal_arglist
*f1
, *f2
;
1683 gcc_assert (name2
!= NULL
);
1685 if (s1
->attr
.function
&& (s2
->attr
.subroutine
1686 || (!s2
->attr
.function
&& s2
->ts
.type
== BT_UNKNOWN
1687 && gfc_get_default_type (name2
, s2
->ns
)->type
== BT_UNKNOWN
)))
1690 snprintf (errmsg
, err_len
, "'%s' is not a function", name2
);
1694 if (s1
->attr
.subroutine
&& s2
->attr
.function
)
1697 snprintf (errmsg
, err_len
, "'%s' is not a subroutine", name2
);
1701 /* Do strict checks on all characteristics
1702 (for dummy procedures and procedure pointer assignments). */
1703 if (!generic_flag
&& strict_flag
)
1705 if (s1
->attr
.function
&& s2
->attr
.function
)
1707 /* If both are functions, check result characteristics. */
1708 if (!gfc_check_result_characteristics (s1
, s2
, errmsg
, err_len
)
1709 || !gfc_check_result_characteristics (s2
, s1
, errmsg
, err_len
))
1713 if (s1
->attr
.pure
&& !s2
->attr
.pure
)
1715 snprintf (errmsg
, err_len
, "Mismatch in PURE attribute");
1718 if (s1
->attr
.elemental
&& !s2
->attr
.elemental
)
1720 snprintf (errmsg
, err_len
, "Mismatch in ELEMENTAL attribute");
1725 if (s1
->attr
.if_source
== IFSRC_UNKNOWN
1726 || s2
->attr
.if_source
== IFSRC_UNKNOWN
)
1729 f1
= gfc_sym_get_dummy_args (s1
);
1730 f2
= gfc_sym_get_dummy_args (s2
);
1732 /* Special case: No arguments. */
1733 if (f1
== NULL
&& f2
== NULL
)
1738 if (count_types_test (f1
, f2
, p1
, p2
)
1739 || count_types_test (f2
, f1
, p2
, p1
))
1742 /* Special case: alternate returns. If both f1->sym and f2->sym are
1743 NULL, then the leading formal arguments are alternate returns.
1744 The previous conditional should catch argument lists with
1745 different number of argument. */
1746 if (f1
&& f1
->sym
== NULL
&& f2
&& f2
->sym
== NULL
)
1749 if (generic_correspondence (f1
, f2
, p1
, p2
)
1750 || generic_correspondence (f2
, f1
, p2
, p1
))
1754 /* Perform the abbreviated correspondence test for operators (the
1755 arguments cannot be optional and are always ordered correctly).
1756 This is also done when comparing interfaces for dummy procedures and in
1757 procedure pointer assignments. */
1759 for (; f1
|| f2
; f1
= f1
->next
, f2
= f2
->next
)
1761 /* Check existence. */
1762 if (f1
== NULL
|| f2
== NULL
)
1765 snprintf (errmsg
, err_len
, "'%s' has the wrong number of "
1766 "arguments", name2
);
1772 /* Check all characteristics. */
1773 if (!gfc_check_dummy_characteristics (f1
->sym
, f2
->sym
, true,
1779 /* Only check type and rank. */
1780 if (!compare_type (f2
->sym
, f1
->sym
))
1783 snprintf (errmsg
, err_len
, "Type mismatch in argument '%s' "
1784 "(%s/%s)", f1
->sym
->name
,
1785 gfc_typename (&f1
->sym
->ts
),
1786 gfc_typename (&f2
->sym
->ts
));
1789 if (!compare_rank (f2
->sym
, f1
->sym
))
1792 snprintf (errmsg
, err_len
, "Rank mismatch in argument '%s' "
1793 "(%i/%i)", f1
->sym
->name
, symbol_rank (f1
->sym
),
1794 symbol_rank (f2
->sym
));
1804 /* Given a pointer to an interface pointer, remove duplicate
1805 interfaces and make sure that all symbols are either functions
1806 or subroutines, and all of the same kind. Returns true if
1807 something goes wrong. */
1810 check_interface0 (gfc_interface
*p
, const char *interface_name
)
1812 gfc_interface
*psave
, *q
, *qlast
;
1815 for (; p
; p
= p
->next
)
1817 /* Make sure all symbols in the interface have been defined as
1818 functions or subroutines. */
1819 if (((!p
->sym
->attr
.function
&& !p
->sym
->attr
.subroutine
)
1820 || !p
->sym
->attr
.if_source
)
1821 && !gfc_fl_struct (p
->sym
->attr
.flavor
))
1824 = gfc_lookup_function_fuzzy (p
->sym
->name
, p
->sym
->ns
->sym_root
);
1826 if (p
->sym
->attr
.external
)
1828 gfc_error ("Procedure %qs in %s at %L has no explicit interface"
1829 "; did you mean %qs?",
1830 p
->sym
->name
, interface_name
, &p
->sym
->declared_at
,
1833 gfc_error ("Procedure %qs in %s at %L has no explicit interface",
1834 p
->sym
->name
, interface_name
, &p
->sym
->declared_at
);
1837 gfc_error ("Procedure %qs in %s at %L is neither function nor "
1838 "subroutine; did you mean %qs?", p
->sym
->name
,
1839 interface_name
, &p
->sym
->declared_at
, guessed
);
1841 gfc_error ("Procedure %qs in %s at %L is neither function nor "
1842 "subroutine", p
->sym
->name
, interface_name
,
1843 &p
->sym
->declared_at
);
1847 /* Verify that procedures are either all SUBROUTINEs or all FUNCTIONs. */
1848 if ((psave
->sym
->attr
.function
&& !p
->sym
->attr
.function
1849 && !gfc_fl_struct (p
->sym
->attr
.flavor
))
1850 || (psave
->sym
->attr
.subroutine
&& !p
->sym
->attr
.subroutine
))
1852 if (!gfc_fl_struct (p
->sym
->attr
.flavor
))
1853 gfc_error ("In %s at %L procedures must be either all SUBROUTINEs"
1854 " or all FUNCTIONs", interface_name
,
1855 &p
->sym
->declared_at
);
1856 else if (p
->sym
->attr
.flavor
== FL_DERIVED
)
1857 gfc_error ("In %s at %L procedures must be all FUNCTIONs as the "
1858 "generic name is also the name of a derived type",
1859 interface_name
, &p
->sym
->declared_at
);
1863 /* F2003, C1207. F2008, C1207. */
1864 if (p
->sym
->attr
.proc
== PROC_INTERNAL
1865 && !gfc_notify_std (GFC_STD_F2008
, "Internal procedure "
1866 "%qs in %s at %L", p
->sym
->name
,
1867 interface_name
, &p
->sym
->declared_at
))
1872 /* Remove duplicate interfaces in this interface list. */
1873 for (; p
; p
= p
->next
)
1877 for (q
= p
->next
; q
;)
1879 if (p
->sym
!= q
->sym
)
1886 /* Duplicate interface. */
1887 qlast
->next
= q
->next
;
1898 /* Check lists of interfaces to make sure that no two interfaces are
1899 ambiguous. Duplicate interfaces (from the same symbol) are OK here. */
1902 check_interface1 (gfc_interface
*p
, gfc_interface
*q0
,
1903 int generic_flag
, const char *interface_name
,
1907 for (; p
; p
= p
->next
)
1908 for (q
= q0
; q
; q
= q
->next
)
1910 if (p
->sym
== q
->sym
)
1911 continue; /* Duplicates OK here. */
1913 if (p
->sym
->name
== q
->sym
->name
&& p
->sym
->module
== q
->sym
->module
)
1916 if (!gfc_fl_struct (p
->sym
->attr
.flavor
)
1917 && !gfc_fl_struct (q
->sym
->attr
.flavor
)
1918 && gfc_compare_interfaces (p
->sym
, q
->sym
, q
->sym
->name
,
1919 generic_flag
, 0, NULL
, 0, NULL
, NULL
))
1922 gfc_error ("Ambiguous interfaces in %s for %qs at %L "
1923 "and %qs at %L", interface_name
,
1924 q
->sym
->name
, &q
->sym
->declared_at
,
1925 p
->sym
->name
, &p
->sym
->declared_at
);
1926 else if (!p
->sym
->attr
.use_assoc
&& q
->sym
->attr
.use_assoc
)
1927 gfc_warning (0, "Ambiguous interfaces in %s for %qs at %L "
1928 "and %qs at %L", interface_name
,
1929 q
->sym
->name
, &q
->sym
->declared_at
,
1930 p
->sym
->name
, &p
->sym
->declared_at
);
1932 gfc_warning (0, "Although not referenced, %qs has ambiguous "
1933 "interfaces at %L", interface_name
, &p
->where
);
1941 /* Check the generic and operator interfaces of symbols to make sure
1942 that none of the interfaces conflict. The check has to be done
1943 after all of the symbols are actually loaded. */
1946 check_sym_interfaces (gfc_symbol
*sym
)
1948 char interface_name
[GFC_MAX_SYMBOL_LEN
+ sizeof("generic interface ''")];
1951 if (sym
->ns
!= gfc_current_ns
)
1954 if (sym
->generic
!= NULL
)
1956 sprintf (interface_name
, "generic interface '%s'", sym
->name
);
1957 if (check_interface0 (sym
->generic
, interface_name
))
1960 for (p
= sym
->generic
; p
; p
= p
->next
)
1962 if (p
->sym
->attr
.mod_proc
1963 && !p
->sym
->attr
.module_procedure
1964 && (p
->sym
->attr
.if_source
!= IFSRC_DECL
1965 || p
->sym
->attr
.procedure
))
1967 gfc_error ("%qs at %L is not a module procedure",
1968 p
->sym
->name
, &p
->where
);
1973 /* Originally, this test was applied to host interfaces too;
1974 this is incorrect since host associated symbols, from any
1975 source, cannot be ambiguous with local symbols. */
1976 check_interface1 (sym
->generic
, sym
->generic
, 1, interface_name
,
1977 sym
->attr
.referenced
|| !sym
->attr
.use_assoc
);
1983 check_uop_interfaces (gfc_user_op
*uop
)
1985 char interface_name
[GFC_MAX_SYMBOL_LEN
+ sizeof("operator interface ''")];
1989 sprintf (interface_name
, "operator interface '%s'", uop
->name
);
1990 if (check_interface0 (uop
->op
, interface_name
))
1993 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
1995 uop2
= gfc_find_uop (uop
->name
, ns
);
1999 check_interface1 (uop
->op
, uop2
->op
, 0,
2000 interface_name
, true);
2004 /* Given an intrinsic op, return an equivalent op if one exists,
2005 or INTRINSIC_NONE otherwise. */
2008 gfc_equivalent_op (gfc_intrinsic_op op
)
2013 return INTRINSIC_EQ_OS
;
2015 case INTRINSIC_EQ_OS
:
2016 return INTRINSIC_EQ
;
2019 return INTRINSIC_NE_OS
;
2021 case INTRINSIC_NE_OS
:
2022 return INTRINSIC_NE
;
2025 return INTRINSIC_GT_OS
;
2027 case INTRINSIC_GT_OS
:
2028 return INTRINSIC_GT
;
2031 return INTRINSIC_GE_OS
;
2033 case INTRINSIC_GE_OS
:
2034 return INTRINSIC_GE
;
2037 return INTRINSIC_LT_OS
;
2039 case INTRINSIC_LT_OS
:
2040 return INTRINSIC_LT
;
2043 return INTRINSIC_LE_OS
;
2045 case INTRINSIC_LE_OS
:
2046 return INTRINSIC_LE
;
2049 return INTRINSIC_NONE
;
2053 /* For the namespace, check generic, user operator and intrinsic
2054 operator interfaces for consistency and to remove duplicate
2055 interfaces. We traverse the whole namespace, counting on the fact
2056 that most symbols will not have generic or operator interfaces. */
2059 gfc_check_interfaces (gfc_namespace
*ns
)
2061 gfc_namespace
*old_ns
, *ns2
;
2062 char interface_name
[GFC_MAX_SYMBOL_LEN
+ sizeof("intrinsic '' operator")];
2065 old_ns
= gfc_current_ns
;
2066 gfc_current_ns
= ns
;
2068 gfc_traverse_ns (ns
, check_sym_interfaces
);
2070 gfc_traverse_user_op (ns
, check_uop_interfaces
);
2072 for (i
= GFC_INTRINSIC_BEGIN
; i
!= GFC_INTRINSIC_END
; i
++)
2074 if (i
== INTRINSIC_USER
)
2077 if (i
== INTRINSIC_ASSIGN
)
2078 strcpy (interface_name
, "intrinsic assignment operator");
2080 sprintf (interface_name
, "intrinsic '%s' operator",
2081 gfc_op2string ((gfc_intrinsic_op
) i
));
2083 if (check_interface0 (ns
->op
[i
], interface_name
))
2087 gfc_check_operator_interface (ns
->op
[i
]->sym
, (gfc_intrinsic_op
) i
,
2090 for (ns2
= ns
; ns2
; ns2
= ns2
->parent
)
2092 gfc_intrinsic_op other_op
;
2094 if (check_interface1 (ns
->op
[i
], ns2
->op
[i
], 0,
2095 interface_name
, true))
2098 /* i should be gfc_intrinsic_op, but has to be int with this cast
2099 here for stupid C++ compatibility rules. */
2100 other_op
= gfc_equivalent_op ((gfc_intrinsic_op
) i
);
2101 if (other_op
!= INTRINSIC_NONE
2102 && check_interface1 (ns
->op
[i
], ns2
->op
[other_op
],
2103 0, interface_name
, true))
2109 gfc_current_ns
= old_ns
;
2113 /* Given a symbol of a formal argument list and an expression, if the
2114 formal argument is allocatable, check that the actual argument is
2115 allocatable. Returns true if compatible, zero if not compatible. */
2118 compare_allocatable (gfc_symbol
*formal
, gfc_expr
*actual
)
2120 if (formal
->attr
.allocatable
2121 || (formal
->ts
.type
== BT_CLASS
&& CLASS_DATA (formal
)->attr
.allocatable
))
2123 symbol_attribute attr
= gfc_expr_attr (actual
);
2124 if (actual
->ts
.type
== BT_CLASS
&& !attr
.class_ok
)
2126 else if (!attr
.allocatable
)
2134 /* Given a symbol of a formal argument list and an expression, if the
2135 formal argument is a pointer, see if the actual argument is a
2136 pointer. Returns nonzero if compatible, zero if not compatible. */
2139 compare_pointer (gfc_symbol
*formal
, gfc_expr
*actual
)
2141 symbol_attribute attr
;
2143 if (formal
->attr
.pointer
2144 || (formal
->ts
.type
== BT_CLASS
&& CLASS_DATA (formal
)
2145 && CLASS_DATA (formal
)->attr
.class_pointer
))
2147 attr
= gfc_expr_attr (actual
);
2149 /* Fortran 2008 allows non-pointer actual arguments. */
2150 if (!attr
.pointer
&& attr
.target
&& formal
->attr
.intent
== INTENT_IN
)
2161 /* Emit clear error messages for rank mismatch. */
2164 argument_rank_mismatch (const char *name
, locus
*where
,
2165 int rank1
, int rank2
)
2168 /* TS 29113, C407b. */
2170 gfc_error ("The assumed-rank array at %L requires that the dummy argument"
2171 " %qs has assumed-rank", where
, name
);
2172 else if (rank1
== 0)
2173 gfc_error_opt (OPT_Wargument_mismatch
, "Rank mismatch in argument %qs "
2174 "at %L (scalar and rank-%d)", name
, where
, rank2
);
2175 else if (rank2
== 0)
2176 gfc_error_opt (OPT_Wargument_mismatch
, "Rank mismatch in argument %qs "
2177 "at %L (rank-%d and scalar)", name
, where
, rank1
);
2179 gfc_error_opt (OPT_Wargument_mismatch
, "Rank mismatch in argument %qs "
2180 "at %L (rank-%d and rank-%d)", name
, where
, rank1
, rank2
);
2184 /* Given a symbol of a formal argument list and an expression, see if
2185 the two are compatible as arguments. Returns true if
2186 compatible, false if not compatible. */
2189 compare_parameter (gfc_symbol
*formal
, gfc_expr
*actual
,
2190 int ranks_must_agree
, int is_elemental
, locus
*where
)
2193 bool rank_check
, is_pointer
;
2197 /* If the formal arg has type BT_VOID, it's to one of the iso_c_binding
2198 procs c_f_pointer or c_f_procpointer, and we need to accept most
2199 pointers the user could give us. This should allow that. */
2200 if (formal
->ts
.type
== BT_VOID
)
2203 if (formal
->ts
.type
== BT_DERIVED
2204 && formal
->ts
.u
.derived
&& formal
->ts
.u
.derived
->ts
.is_iso_c
2205 && actual
->ts
.type
== BT_DERIVED
2206 && actual
->ts
.u
.derived
&& actual
->ts
.u
.derived
->ts
.is_iso_c
)
2209 if (formal
->ts
.type
== BT_CLASS
&& actual
->ts
.type
== BT_DERIVED
)
2210 /* Make sure the vtab symbol is present when
2211 the module variables are generated. */
2212 gfc_find_derived_vtab (actual
->ts
.u
.derived
);
2214 if (actual
->ts
.type
== BT_PROCEDURE
)
2216 gfc_symbol
*act_sym
= actual
->symtree
->n
.sym
;
2218 if (formal
->attr
.flavor
!= FL_PROCEDURE
)
2221 gfc_error ("Invalid procedure argument at %L", &actual
->where
);
2225 if (!gfc_compare_interfaces (formal
, act_sym
, act_sym
->name
, 0, 1, err
,
2226 sizeof(err
), NULL
, NULL
))
2229 gfc_error_opt (OPT_Wargument_mismatch
,
2230 "Interface mismatch in dummy procedure %qs at %L:"
2231 " %s", formal
->name
, &actual
->where
, err
);
2235 if (formal
->attr
.function
&& !act_sym
->attr
.function
)
2237 gfc_add_function (&act_sym
->attr
, act_sym
->name
,
2238 &act_sym
->declared_at
);
2239 if (act_sym
->ts
.type
== BT_UNKNOWN
2240 && !gfc_set_default_type (act_sym
, 1, act_sym
->ns
))
2243 else if (formal
->attr
.subroutine
&& !act_sym
->attr
.subroutine
)
2244 gfc_add_subroutine (&act_sym
->attr
, act_sym
->name
,
2245 &act_sym
->declared_at
);
2250 ppc
= gfc_get_proc_ptr_comp (actual
);
2251 if (ppc
&& ppc
->ts
.interface
)
2253 if (!gfc_compare_interfaces (formal
, ppc
->ts
.interface
, ppc
->name
, 0, 1,
2254 err
, sizeof(err
), NULL
, NULL
))
2257 gfc_error_opt (OPT_Wargument_mismatch
,
2258 "Interface mismatch in dummy procedure %qs at %L:"
2259 " %s", formal
->name
, &actual
->where
, err
);
2265 if (formal
->attr
.pointer
&& formal
->attr
.contiguous
2266 && !gfc_is_simply_contiguous (actual
, true, false))
2269 gfc_error ("Actual argument to contiguous pointer dummy %qs at %L "
2270 "must be simply contiguous", formal
->name
, &actual
->where
);
2274 symbol_attribute actual_attr
= gfc_expr_attr (actual
);
2275 if (actual
->ts
.type
== BT_CLASS
&& !actual_attr
.class_ok
)
2278 if ((actual
->expr_type
!= EXPR_NULL
|| actual
->ts
.type
!= BT_UNKNOWN
)
2279 && actual
->ts
.type
!= BT_HOLLERITH
2280 && formal
->ts
.type
!= BT_ASSUMED
2281 && !(formal
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
2282 && !gfc_compare_types (&formal
->ts
, &actual
->ts
)
2283 && !(formal
->ts
.type
== BT_DERIVED
&& actual
->ts
.type
== BT_CLASS
2284 && gfc_compare_derived_types (formal
->ts
.u
.derived
,
2285 CLASS_DATA (actual
)->ts
.u
.derived
)))
2288 gfc_error_opt (OPT_Wargument_mismatch
,
2289 "Type mismatch in argument %qs at %L; passed %s to %s",
2290 formal
->name
, where
, gfc_typename (&actual
->ts
),
2291 gfc_typename (&formal
->ts
));
2295 if (actual
->ts
.type
== BT_ASSUMED
&& formal
->ts
.type
!= BT_ASSUMED
)
2298 gfc_error ("Assumed-type actual argument at %L requires that dummy "
2299 "argument %qs is of assumed type", &actual
->where
,
2304 /* F2008, 12.5.2.5; IR F08/0073. */
2305 if (formal
->ts
.type
== BT_CLASS
&& formal
->attr
.class_ok
2306 && actual
->expr_type
!= EXPR_NULL
2307 && ((CLASS_DATA (formal
)->attr
.class_pointer
2308 && formal
->attr
.intent
!= INTENT_IN
)
2309 || CLASS_DATA (formal
)->attr
.allocatable
))
2311 if (actual
->ts
.type
!= BT_CLASS
)
2314 gfc_error ("Actual argument to %qs at %L must be polymorphic",
2315 formal
->name
, &actual
->where
);
2319 if ((!UNLIMITED_POLY (formal
) || !UNLIMITED_POLY(actual
))
2320 && !gfc_compare_derived_types (CLASS_DATA (actual
)->ts
.u
.derived
,
2321 CLASS_DATA (formal
)->ts
.u
.derived
))
2324 gfc_error ("Actual argument to %qs at %L must have the same "
2325 "declared type", formal
->name
, &actual
->where
);
2330 /* F08: 12.5.2.5 Allocatable and pointer dummy variables. However, this
2331 is necessary also for F03, so retain error for both.
2332 NOTE: Other type/kind errors pre-empt this error. Since they are F03
2333 compatible, no attempt has been made to channel to this one. */
2334 if (UNLIMITED_POLY (formal
) && !UNLIMITED_POLY (actual
)
2335 && (CLASS_DATA (formal
)->attr
.allocatable
2336 ||CLASS_DATA (formal
)->attr
.class_pointer
))
2339 gfc_error ("Actual argument to %qs at %L must be unlimited "
2340 "polymorphic since the formal argument is a "
2341 "pointer or allocatable unlimited polymorphic "
2342 "entity [F2008: 12.5.2.5]", formal
->name
,
2347 if (formal
->attr
.codimension
&& !gfc_is_coarray (actual
))
2350 gfc_error ("Actual argument to %qs at %L must be a coarray",
2351 formal
->name
, &actual
->where
);
2355 if (formal
->attr
.codimension
&& formal
->attr
.allocatable
)
2357 gfc_ref
*last
= NULL
;
2359 for (ref
= actual
->ref
; ref
; ref
= ref
->next
)
2360 if (ref
->type
== REF_COMPONENT
)
2363 /* F2008, 12.5.2.6. */
2364 if ((last
&& last
->u
.c
.component
->as
->corank
!= formal
->as
->corank
)
2366 && actual
->symtree
->n
.sym
->as
->corank
!= formal
->as
->corank
))
2369 gfc_error ("Corank mismatch in argument %qs at %L (%d and %d)",
2370 formal
->name
, &actual
->where
, formal
->as
->corank
,
2371 last
? last
->u
.c
.component
->as
->corank
2372 : actual
->symtree
->n
.sym
->as
->corank
);
2377 if (formal
->attr
.codimension
)
2379 /* F2008, 12.5.2.8 + Corrig 2 (IR F08/0048). */
2380 /* F2018, 12.5.2.8. */
2381 if (formal
->attr
.dimension
2382 && (formal
->attr
.contiguous
|| formal
->as
->type
!= AS_ASSUMED_SHAPE
)
2383 && actual_attr
.dimension
2384 && !gfc_is_simply_contiguous (actual
, true, true))
2387 gfc_error ("Actual argument to %qs at %L must be simply "
2388 "contiguous or an element of such an array",
2389 formal
->name
, &actual
->where
);
2393 /* F2008, C1303 and C1304. */
2394 if (formal
->attr
.intent
!= INTENT_INOUT
2395 && (((formal
->ts
.type
== BT_DERIVED
|| formal
->ts
.type
== BT_CLASS
)
2396 && formal
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
2397 && formal
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
2398 || formal
->attr
.lock_comp
))
2402 gfc_error ("Actual argument to non-INTENT(INOUT) dummy %qs at %L, "
2403 "which is LOCK_TYPE or has a LOCK_TYPE component",
2404 formal
->name
, &actual
->where
);
2408 /* TS18508, C702/C703. */
2409 if (formal
->attr
.intent
!= INTENT_INOUT
2410 && (((formal
->ts
.type
== BT_DERIVED
|| formal
->ts
.type
== BT_CLASS
)
2411 && formal
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
2412 && formal
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
2413 || formal
->attr
.event_comp
))
2417 gfc_error ("Actual argument to non-INTENT(INOUT) dummy %qs at %L, "
2418 "which is EVENT_TYPE or has a EVENT_TYPE component",
2419 formal
->name
, &actual
->where
);
2424 /* F2008, C1239/C1240. */
2425 if (actual
->expr_type
== EXPR_VARIABLE
2426 && (actual
->symtree
->n
.sym
->attr
.asynchronous
2427 || actual
->symtree
->n
.sym
->attr
.volatile_
)
2428 && (formal
->attr
.asynchronous
|| formal
->attr
.volatile_
)
2429 && actual
->rank
&& formal
->as
2430 && !gfc_is_simply_contiguous (actual
, true, false)
2431 && ((formal
->as
->type
!= AS_ASSUMED_SHAPE
2432 && formal
->as
->type
!= AS_ASSUMED_RANK
&& !formal
->attr
.pointer
)
2433 || formal
->attr
.contiguous
))
2436 gfc_error ("Dummy argument %qs has to be a pointer, assumed-shape or "
2437 "assumed-rank array without CONTIGUOUS attribute - as actual"
2438 " argument at %L is not simply contiguous and both are "
2439 "ASYNCHRONOUS or VOLATILE", formal
->name
, &actual
->where
);
2443 if (formal
->attr
.allocatable
&& !formal
->attr
.codimension
2444 && actual_attr
.codimension
)
2446 if (formal
->attr
.intent
== INTENT_OUT
)
2449 gfc_error ("Passing coarray at %L to allocatable, noncoarray, "
2450 "INTENT(OUT) dummy argument %qs", &actual
->where
,
2454 else if (warn_surprising
&& where
&& formal
->attr
.intent
!= INTENT_IN
)
2455 gfc_warning (OPT_Wsurprising
,
2456 "Passing coarray at %L to allocatable, noncoarray dummy "
2457 "argument %qs, which is invalid if the allocation status"
2458 " is modified", &actual
->where
, formal
->name
);
2461 /* If the rank is the same or the formal argument has assumed-rank. */
2462 if (symbol_rank (formal
) == actual
->rank
|| symbol_rank (formal
) == -1)
2465 rank_check
= where
!= NULL
&& !is_elemental
&& formal
->as
2466 && (formal
->as
->type
== AS_ASSUMED_SHAPE
2467 || formal
->as
->type
== AS_DEFERRED
)
2468 && actual
->expr_type
!= EXPR_NULL
;
2470 /* Skip rank checks for NO_ARG_CHECK. */
2471 if (formal
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
2474 /* Scalar & coindexed, see: F2008, Section 12.5.2.4. */
2475 if (rank_check
|| ranks_must_agree
2476 || (formal
->attr
.pointer
&& actual
->expr_type
!= EXPR_NULL
)
2477 || (actual
->rank
!= 0 && !(is_elemental
|| formal
->attr
.dimension
))
2478 || (actual
->rank
== 0
2479 && ((formal
->ts
.type
== BT_CLASS
2480 && CLASS_DATA (formal
)->as
->type
== AS_ASSUMED_SHAPE
)
2481 || (formal
->ts
.type
!= BT_CLASS
2482 && formal
->as
->type
== AS_ASSUMED_SHAPE
))
2483 && actual
->expr_type
!= EXPR_NULL
)
2484 || (actual
->rank
== 0 && formal
->attr
.dimension
2485 && gfc_is_coindexed (actual
)))
2488 argument_rank_mismatch (formal
->name
, &actual
->where
,
2489 symbol_rank (formal
), actual
->rank
);
2492 else if (actual
->rank
!= 0 && (is_elemental
|| formal
->attr
.dimension
))
2495 /* At this point, we are considering a scalar passed to an array. This
2496 is valid (cf. F95 12.4.1.1, F2003 12.4.1.2, and F2008 12.5.2.4),
2497 - if the actual argument is (a substring of) an element of a
2498 non-assumed-shape/non-pointer/non-polymorphic array; or
2499 - (F2003) if the actual argument is of type character of default/c_char
2502 is_pointer
= actual
->expr_type
== EXPR_VARIABLE
2503 ? actual
->symtree
->n
.sym
->attr
.pointer
: false;
2505 for (ref
= actual
->ref
; ref
; ref
= ref
->next
)
2507 if (ref
->type
== REF_COMPONENT
)
2508 is_pointer
= ref
->u
.c
.component
->attr
.pointer
;
2509 else if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.type
== AR_ELEMENT
2510 && ref
->u
.ar
.dimen
> 0
2512 || (ref
->next
->type
== REF_SUBSTRING
&& !ref
->next
->next
)))
2516 if (actual
->ts
.type
== BT_CLASS
&& actual
->expr_type
!= EXPR_NULL
)
2519 gfc_error ("Polymorphic scalar passed to array dummy argument %qs "
2520 "at %L", formal
->name
, &actual
->where
);
2524 if (actual
->expr_type
!= EXPR_NULL
&& ref
&& actual
->ts
.type
!= BT_CHARACTER
2525 && (is_pointer
|| ref
->u
.ar
.as
->type
== AS_ASSUMED_SHAPE
))
2528 gfc_error ("Element of assumed-shaped or pointer "
2529 "array passed to array dummy argument %qs at %L",
2530 formal
->name
, &actual
->where
);
2534 if (actual
->ts
.type
== BT_CHARACTER
&& actual
->expr_type
!= EXPR_NULL
2535 && (!ref
|| is_pointer
|| ref
->u
.ar
.as
->type
== AS_ASSUMED_SHAPE
))
2537 if (formal
->ts
.kind
!= 1 && (gfc_option
.allow_std
& GFC_STD_GNU
) == 0)
2540 gfc_error ("Extension: Scalar non-default-kind, non-C_CHAR-kind "
2541 "CHARACTER actual argument with array dummy argument "
2542 "%qs at %L", formal
->name
, &actual
->where
);
2546 if (where
&& (gfc_option
.allow_std
& GFC_STD_F2003
) == 0)
2548 gfc_error ("Fortran 2003: Scalar CHARACTER actual argument with "
2549 "array dummy argument %qs at %L",
2550 formal
->name
, &actual
->where
);
2554 return ((gfc_option
.allow_std
& GFC_STD_F2003
) != 0);
2557 if (ref
== NULL
&& actual
->expr_type
!= EXPR_NULL
)
2560 argument_rank_mismatch (formal
->name
, &actual
->where
,
2561 symbol_rank (formal
), actual
->rank
);
2569 /* Returns the storage size of a symbol (formal argument) or
2570 zero if it cannot be determined. */
2572 static unsigned long
2573 get_sym_storage_size (gfc_symbol
*sym
)
2576 unsigned long strlen
, elements
;
2578 if (sym
->ts
.type
== BT_CHARACTER
)
2580 if (sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
2581 && sym
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
2582 strlen
= mpz_get_ui (sym
->ts
.u
.cl
->length
->value
.integer
);
2589 if (symbol_rank (sym
) == 0)
2593 if (sym
->as
->type
!= AS_EXPLICIT
)
2595 for (i
= 0; i
< sym
->as
->rank
; i
++)
2597 if (sym
->as
->upper
[i
]->expr_type
!= EXPR_CONSTANT
2598 || sym
->as
->lower
[i
]->expr_type
!= EXPR_CONSTANT
)
2601 elements
*= mpz_get_si (sym
->as
->upper
[i
]->value
.integer
)
2602 - mpz_get_si (sym
->as
->lower
[i
]->value
.integer
) + 1L;
2605 return strlen
*elements
;
2609 /* Returns the storage size of an expression (actual argument) or
2610 zero if it cannot be determined. For an array element, it returns
2611 the remaining size as the element sequence consists of all storage
2612 units of the actual argument up to the end of the array. */
2614 static unsigned long
2615 get_expr_storage_size (gfc_expr
*e
)
2618 long int strlen
, elements
;
2619 long int substrlen
= 0;
2620 bool is_str_storage
= false;
2626 if (e
->ts
.type
== BT_CHARACTER
)
2628 if (e
->ts
.u
.cl
&& e
->ts
.u
.cl
->length
2629 && e
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
2630 strlen
= mpz_get_si (e
->ts
.u
.cl
->length
->value
.integer
);
2631 else if (e
->expr_type
== EXPR_CONSTANT
2632 && (e
->ts
.u
.cl
== NULL
|| e
->ts
.u
.cl
->length
== NULL
))
2633 strlen
= e
->value
.character
.length
;
2638 strlen
= 1; /* Length per element. */
2640 if (e
->rank
== 0 && !e
->ref
)
2648 for (i
= 0; i
< e
->rank
; i
++)
2649 elements
*= mpz_get_si (e
->shape
[i
]);
2650 return elements
*strlen
;
2653 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
2655 if (ref
->type
== REF_SUBSTRING
&& ref
->u
.ss
.start
2656 && ref
->u
.ss
.start
->expr_type
== EXPR_CONSTANT
)
2660 /* The string length is the substring length.
2661 Set now to full string length. */
2662 if (!ref
->u
.ss
.length
|| !ref
->u
.ss
.length
->length
2663 || ref
->u
.ss
.length
->length
->expr_type
!= EXPR_CONSTANT
)
2666 strlen
= mpz_get_ui (ref
->u
.ss
.length
->length
->value
.integer
);
2668 substrlen
= strlen
- mpz_get_ui (ref
->u
.ss
.start
->value
.integer
) + 1;
2672 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.type
== AR_SECTION
)
2673 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
2675 long int start
, end
, stride
;
2678 if (ref
->u
.ar
.stride
[i
])
2680 if (ref
->u
.ar
.stride
[i
]->expr_type
== EXPR_CONSTANT
)
2681 stride
= mpz_get_si (ref
->u
.ar
.stride
[i
]->value
.integer
);
2686 if (ref
->u
.ar
.start
[i
])
2688 if (ref
->u
.ar
.start
[i
]->expr_type
== EXPR_CONSTANT
)
2689 start
= mpz_get_si (ref
->u
.ar
.start
[i
]->value
.integer
);
2693 else if (ref
->u
.ar
.as
->lower
[i
]
2694 && ref
->u
.ar
.as
->lower
[i
]->expr_type
== EXPR_CONSTANT
)
2695 start
= mpz_get_si (ref
->u
.ar
.as
->lower
[i
]->value
.integer
);
2699 if (ref
->u
.ar
.end
[i
])
2701 if (ref
->u
.ar
.end
[i
]->expr_type
== EXPR_CONSTANT
)
2702 end
= mpz_get_si (ref
->u
.ar
.end
[i
]->value
.integer
);
2706 else if (ref
->u
.ar
.as
->upper
[i
]
2707 && ref
->u
.ar
.as
->upper
[i
]->expr_type
== EXPR_CONSTANT
)
2708 end
= mpz_get_si (ref
->u
.ar
.as
->upper
[i
]->value
.integer
);
2712 elements
*= (end
- start
)/stride
+ 1L;
2714 else if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.type
== AR_FULL
)
2715 for (i
= 0; i
< ref
->u
.ar
.as
->rank
; i
++)
2717 if (ref
->u
.ar
.as
->lower
[i
] && ref
->u
.ar
.as
->upper
[i
]
2718 && ref
->u
.ar
.as
->lower
[i
]->expr_type
== EXPR_CONSTANT
2719 && ref
->u
.ar
.as
->lower
[i
]->ts
.type
== BT_INTEGER
2720 && ref
->u
.ar
.as
->upper
[i
]->expr_type
== EXPR_CONSTANT
2721 && ref
->u
.ar
.as
->upper
[i
]->ts
.type
== BT_INTEGER
)
2722 elements
*= mpz_get_si (ref
->u
.ar
.as
->upper
[i
]->value
.integer
)
2723 - mpz_get_si (ref
->u
.ar
.as
->lower
[i
]->value
.integer
)
2728 else if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.type
== AR_ELEMENT
2729 && e
->expr_type
== EXPR_VARIABLE
)
2731 if (ref
->u
.ar
.as
->type
== AS_ASSUMED_SHAPE
2732 || e
->symtree
->n
.sym
->attr
.pointer
)
2738 /* Determine the number of remaining elements in the element
2739 sequence for array element designators. */
2740 is_str_storage
= true;
2741 for (i
= ref
->u
.ar
.dimen
- 1; i
>= 0; i
--)
2743 if (ref
->u
.ar
.start
[i
] == NULL
2744 || ref
->u
.ar
.start
[i
]->expr_type
!= EXPR_CONSTANT
2745 || ref
->u
.ar
.as
->upper
[i
] == NULL
2746 || ref
->u
.ar
.as
->lower
[i
] == NULL
2747 || ref
->u
.ar
.as
->upper
[i
]->expr_type
!= EXPR_CONSTANT
2748 || ref
->u
.ar
.as
->lower
[i
]->expr_type
!= EXPR_CONSTANT
)
2753 * (mpz_get_si (ref
->u
.ar
.as
->upper
[i
]->value
.integer
)
2754 - mpz_get_si (ref
->u
.ar
.as
->lower
[i
]->value
.integer
)
2756 - (mpz_get_si (ref
->u
.ar
.start
[i
]->value
.integer
)
2757 - mpz_get_si (ref
->u
.ar
.as
->lower
[i
]->value
.integer
));
2760 else if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.function
2761 && ref
->u
.c
.component
->attr
.proc_pointer
2762 && ref
->u
.c
.component
->attr
.dimension
)
2764 /* Array-valued procedure-pointer components. */
2765 gfc_array_spec
*as
= ref
->u
.c
.component
->as
;
2766 for (i
= 0; i
< as
->rank
; i
++)
2768 if (!as
->upper
[i
] || !as
->lower
[i
]
2769 || as
->upper
[i
]->expr_type
!= EXPR_CONSTANT
2770 || as
->lower
[i
]->expr_type
!= EXPR_CONSTANT
)
2774 * (mpz_get_si (as
->upper
[i
]->value
.integer
)
2775 - mpz_get_si (as
->lower
[i
]->value
.integer
) + 1L);
2781 return (is_str_storage
) ? substrlen
+ (elements
-1)*strlen
2784 return elements
*strlen
;
2788 /* Given an expression, check whether it is an array section
2789 which has a vector subscript. */
2792 gfc_has_vector_subscript (gfc_expr
*e
)
2797 if (e
== NULL
|| e
->rank
== 0 || e
->expr_type
!= EXPR_VARIABLE
)
2800 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
2801 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.type
== AR_SECTION
)
2802 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
2803 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
)
2811 is_procptr_result (gfc_expr
*expr
)
2813 gfc_component
*c
= gfc_get_proc_ptr_comp (expr
);
2815 return (c
->ts
.interface
&& (c
->ts
.interface
->attr
.proc_pointer
== 1));
2817 return ((expr
->symtree
->n
.sym
->result
!= expr
->symtree
->n
.sym
)
2818 && (expr
->symtree
->n
.sym
->result
->attr
.proc_pointer
== 1));
2822 /* Recursively append candidate argument ARG to CANDIDATES. Store the
2823 number of total candidates in CANDIDATES_LEN. */
2826 lookup_arg_fuzzy_find_candidates (gfc_formal_arglist
*arg
,
2828 size_t &candidates_len
)
2830 for (gfc_formal_arglist
*p
= arg
; p
&& p
->sym
; p
= p
->next
)
2831 vec_push (candidates
, candidates_len
, p
->sym
->name
);
2835 /* Lookup argument ARG fuzzily, taking names in ARGUMENTS into account. */
2838 lookup_arg_fuzzy (const char *arg
, gfc_formal_arglist
*arguments
)
2840 char **candidates
= NULL
;
2841 size_t candidates_len
= 0;
2842 lookup_arg_fuzzy_find_candidates (arguments
, candidates
, candidates_len
);
2843 return gfc_closest_fuzzy_match (arg
, candidates
);
2847 /* Given formal and actual argument lists, see if they are compatible.
2848 If they are compatible, the actual argument list is sorted to
2849 correspond with the formal list, and elements for missing optional
2850 arguments are inserted. If WHERE pointer is nonnull, then we issue
2851 errors when things don't match instead of just returning the status
2855 compare_actual_formal (gfc_actual_arglist
**ap
, gfc_formal_arglist
*formal
,
2856 int ranks_must_agree
, int is_elemental
,
2857 bool in_statement_function
, locus
*where
)
2859 gfc_actual_arglist
**new_arg
, *a
, *actual
;
2860 gfc_formal_arglist
*f
;
2862 unsigned long actual_size
, formal_size
;
2863 bool full_array
= false;
2864 gfc_array_ref
*actual_arr_ref
;
2868 if (actual
== NULL
&& formal
== NULL
)
2872 for (f
= formal
; f
; f
= f
->next
)
2875 new_arg
= XALLOCAVEC (gfc_actual_arglist
*, n
);
2877 for (i
= 0; i
< n
; i
++)
2884 for (a
= actual
; a
; a
= a
->next
, f
= f
->next
)
2886 if (a
->name
!= NULL
&& in_statement_function
)
2888 gfc_error ("Keyword argument %qs at %L is invalid in "
2889 "a statement function", a
->name
, &a
->expr
->where
);
2893 /* Look for keywords but ignore g77 extensions like %VAL. */
2894 if (a
->name
!= NULL
&& a
->name
[0] != '%')
2897 for (f
= formal
; f
; f
= f
->next
, i
++)
2901 if (strcmp (f
->sym
->name
, a
->name
) == 0)
2909 const char *guessed
= lookup_arg_fuzzy (a
->name
, formal
);
2911 gfc_error ("Keyword argument %qs at %L is not in "
2912 "the procedure; did you mean %qs?",
2913 a
->name
, &a
->expr
->where
, guessed
);
2915 gfc_error ("Keyword argument %qs at %L is not in "
2916 "the procedure", a
->name
, &a
->expr
->where
);
2921 if (new_arg
[i
] != NULL
)
2924 gfc_error ("Keyword argument %qs at %L is already associated "
2925 "with another actual argument", a
->name
,
2934 gfc_error ("More actual than formal arguments in procedure "
2935 "call at %L", where
);
2940 if (f
->sym
== NULL
&& a
->expr
== NULL
)
2946 gfc_error ("Missing alternate return spec in subroutine call "
2951 if (a
->expr
== NULL
)
2954 gfc_error ("Unexpected alternate return spec in subroutine "
2955 "call at %L", where
);
2959 /* Make sure that intrinsic vtables exist for calls to unlimited
2960 polymorphic formal arguments. */
2961 if (UNLIMITED_POLY (f
->sym
)
2962 && a
->expr
->ts
.type
!= BT_DERIVED
2963 && a
->expr
->ts
.type
!= BT_CLASS
)
2964 gfc_find_vtab (&a
->expr
->ts
);
2966 if (a
->expr
->expr_type
== EXPR_NULL
2967 && ((f
->sym
->ts
.type
!= BT_CLASS
&& !f
->sym
->attr
.pointer
2968 && (f
->sym
->attr
.allocatable
|| !f
->sym
->attr
.optional
2969 || (gfc_option
.allow_std
& GFC_STD_F2008
) == 0))
2970 || (f
->sym
->ts
.type
== BT_CLASS
2971 && !CLASS_DATA (f
->sym
)->attr
.class_pointer
2972 && (CLASS_DATA (f
->sym
)->attr
.allocatable
2973 || !f
->sym
->attr
.optional
2974 || (gfc_option
.allow_std
& GFC_STD_F2008
) == 0))))
2977 && (!f
->sym
->attr
.optional
2978 || (f
->sym
->ts
.type
!= BT_CLASS
&& f
->sym
->attr
.allocatable
)
2979 || (f
->sym
->ts
.type
== BT_CLASS
2980 && CLASS_DATA (f
->sym
)->attr
.allocatable
)))
2981 gfc_error ("Unexpected NULL() intrinsic at %L to dummy %qs",
2982 where
, f
->sym
->name
);
2984 gfc_error ("Fortran 2008: Null pointer at %L to non-pointer "
2985 "dummy %qs", where
, f
->sym
->name
);
2990 if (!compare_parameter (f
->sym
, a
->expr
, ranks_must_agree
,
2991 is_elemental
, where
))
2994 /* TS 29113, 6.3p2. */
2995 if (f
->sym
->ts
.type
== BT_ASSUMED
2996 && (a
->expr
->ts
.type
== BT_DERIVED
2997 || (a
->expr
->ts
.type
== BT_CLASS
&& CLASS_DATA (a
->expr
))))
2999 gfc_namespace
*f2k_derived
;
3001 f2k_derived
= a
->expr
->ts
.type
== BT_DERIVED
3002 ? a
->expr
->ts
.u
.derived
->f2k_derived
3003 : CLASS_DATA (a
->expr
)->ts
.u
.derived
->f2k_derived
;
3006 && (f2k_derived
->finalizers
|| f2k_derived
->tb_sym_root
))
3008 gfc_error ("Actual argument at %L to assumed-type dummy is of "
3009 "derived type with type-bound or FINAL procedures",
3015 /* Special case for character arguments. For allocatable, pointer
3016 and assumed-shape dummies, the string length needs to match
3018 if (a
->expr
->ts
.type
== BT_CHARACTER
3019 && a
->expr
->ts
.u
.cl
&& a
->expr
->ts
.u
.cl
->length
3020 && a
->expr
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
3021 && f
->sym
->ts
.type
== BT_CHARACTER
&& f
->sym
->ts
.u
.cl
3022 && f
->sym
->ts
.u
.cl
->length
3023 && f
->sym
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
3024 && (f
->sym
->attr
.pointer
|| f
->sym
->attr
.allocatable
3025 || (f
->sym
->as
&& f
->sym
->as
->type
== AS_ASSUMED_SHAPE
))
3026 && (mpz_cmp (a
->expr
->ts
.u
.cl
->length
->value
.integer
,
3027 f
->sym
->ts
.u
.cl
->length
->value
.integer
) != 0))
3029 if (where
&& (f
->sym
->attr
.pointer
|| f
->sym
->attr
.allocatable
))
3030 gfc_warning (OPT_Wargument_mismatch
,
3031 "Character length mismatch (%ld/%ld) between actual "
3032 "argument and pointer or allocatable dummy argument "
3034 mpz_get_si (a
->expr
->ts
.u
.cl
->length
->value
.integer
),
3035 mpz_get_si (f
->sym
->ts
.u
.cl
->length
->value
.integer
),
3036 f
->sym
->name
, &a
->expr
->where
);
3038 gfc_warning (OPT_Wargument_mismatch
,
3039 "Character length mismatch (%ld/%ld) between actual "
3040 "argument and assumed-shape dummy argument %qs "
3042 mpz_get_si (a
->expr
->ts
.u
.cl
->length
->value
.integer
),
3043 mpz_get_si (f
->sym
->ts
.u
.cl
->length
->value
.integer
),
3044 f
->sym
->name
, &a
->expr
->where
);
3048 if ((f
->sym
->attr
.pointer
|| f
->sym
->attr
.allocatable
)
3049 && f
->sym
->ts
.deferred
!= a
->expr
->ts
.deferred
3050 && a
->expr
->ts
.type
== BT_CHARACTER
)
3053 gfc_error ("Actual argument at %L to allocatable or "
3054 "pointer dummy argument %qs must have a deferred "
3055 "length type parameter if and only if the dummy has one",
3056 &a
->expr
->where
, f
->sym
->name
);
3060 if (f
->sym
->ts
.type
== BT_CLASS
)
3061 goto skip_size_check
;
3063 actual_size
= get_expr_storage_size (a
->expr
);
3064 formal_size
= get_sym_storage_size (f
->sym
);
3065 if (actual_size
!= 0 && actual_size
< formal_size
3066 && a
->expr
->ts
.type
!= BT_PROCEDURE
3067 && f
->sym
->attr
.flavor
!= FL_PROCEDURE
)
3069 if (a
->expr
->ts
.type
== BT_CHARACTER
&& !f
->sym
->as
&& where
)
3070 gfc_warning (OPT_Wargument_mismatch
,
3071 "Character length of actual argument shorter "
3072 "than of dummy argument %qs (%lu/%lu) at %L",
3073 f
->sym
->name
, actual_size
, formal_size
,
3077 /* Emit a warning for -std=legacy and an error otherwise. */
3078 if (gfc_option
.warn_std
== 0)
3079 gfc_warning (OPT_Wargument_mismatch
,
3080 "Actual argument contains too few "
3081 "elements for dummy argument %qs (%lu/%lu) "
3082 "at %L", f
->sym
->name
, actual_size
,
3083 formal_size
, &a
->expr
->where
);
3085 gfc_error_now ("Actual argument contains too few "
3086 "elements for dummy argument %qs (%lu/%lu) "
3087 "at %L", f
->sym
->name
, actual_size
,
3088 formal_size
, &a
->expr
->where
);
3095 /* Satisfy F03:12.4.1.3 by ensuring that a procedure pointer actual
3096 argument is provided for a procedure pointer formal argument. */
3097 if (f
->sym
->attr
.proc_pointer
3098 && !((a
->expr
->expr_type
== EXPR_VARIABLE
3099 && (a
->expr
->symtree
->n
.sym
->attr
.proc_pointer
3100 || gfc_is_proc_ptr_comp (a
->expr
)))
3101 || (a
->expr
->expr_type
== EXPR_FUNCTION
3102 && is_procptr_result (a
->expr
))))
3105 gfc_error ("Expected a procedure pointer for argument %qs at %L",
3106 f
->sym
->name
, &a
->expr
->where
);
3110 /* Satisfy F03:12.4.1.3 by ensuring that a procedure actual argument is
3111 provided for a procedure formal argument. */
3112 if (f
->sym
->attr
.flavor
== FL_PROCEDURE
3113 && !((a
->expr
->expr_type
== EXPR_VARIABLE
3114 && (a
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
3115 || a
->expr
->symtree
->n
.sym
->attr
.proc_pointer
3116 || gfc_is_proc_ptr_comp (a
->expr
)))
3117 || (a
->expr
->expr_type
== EXPR_FUNCTION
3118 && is_procptr_result (a
->expr
))))
3121 gfc_error ("Expected a procedure for argument %qs at %L",
3122 f
->sym
->name
, &a
->expr
->where
);
3126 if (f
->sym
->as
&& f
->sym
->as
->type
== AS_ASSUMED_SHAPE
3127 && a
->expr
->expr_type
== EXPR_VARIABLE
3128 && a
->expr
->symtree
->n
.sym
->as
3129 && a
->expr
->symtree
->n
.sym
->as
->type
== AS_ASSUMED_SIZE
3130 && (a
->expr
->ref
== NULL
3131 || (a
->expr
->ref
->type
== REF_ARRAY
3132 && a
->expr
->ref
->u
.ar
.type
== AR_FULL
)))
3135 gfc_error ("Actual argument for %qs cannot be an assumed-size"
3136 " array at %L", f
->sym
->name
, where
);
3140 if (a
->expr
->expr_type
!= EXPR_NULL
3141 && compare_pointer (f
->sym
, a
->expr
) == 0)
3144 gfc_error ("Actual argument for %qs must be a pointer at %L",
3145 f
->sym
->name
, &a
->expr
->where
);
3149 if (a
->expr
->expr_type
!= EXPR_NULL
3150 && (gfc_option
.allow_std
& GFC_STD_F2008
) == 0
3151 && compare_pointer (f
->sym
, a
->expr
) == 2)
3154 gfc_error ("Fortran 2008: Non-pointer actual argument at %L to "
3155 "pointer dummy %qs", &a
->expr
->where
,f
->sym
->name
);
3160 /* Fortran 2008, C1242. */
3161 if (f
->sym
->attr
.pointer
&& gfc_is_coindexed (a
->expr
))
3164 gfc_error ("Coindexed actual argument at %L to pointer "
3166 &a
->expr
->where
, f
->sym
->name
);
3170 /* Fortran 2008, 12.5.2.5 (no constraint). */
3171 if (a
->expr
->expr_type
== EXPR_VARIABLE
3172 && f
->sym
->attr
.intent
!= INTENT_IN
3173 && f
->sym
->attr
.allocatable
3174 && gfc_is_coindexed (a
->expr
))
3177 gfc_error ("Coindexed actual argument at %L to allocatable "
3178 "dummy %qs requires INTENT(IN)",
3179 &a
->expr
->where
, f
->sym
->name
);
3183 /* Fortran 2008, C1237. */
3184 if (a
->expr
->expr_type
== EXPR_VARIABLE
3185 && (f
->sym
->attr
.asynchronous
|| f
->sym
->attr
.volatile_
)
3186 && gfc_is_coindexed (a
->expr
)
3187 && (a
->expr
->symtree
->n
.sym
->attr
.volatile_
3188 || a
->expr
->symtree
->n
.sym
->attr
.asynchronous
))
3191 gfc_error ("Coindexed ASYNCHRONOUS or VOLATILE actual argument at "
3192 "%L requires that dummy %qs has neither "
3193 "ASYNCHRONOUS nor VOLATILE", &a
->expr
->where
,
3198 /* Fortran 2008, 12.5.2.4 (no constraint). */
3199 if (a
->expr
->expr_type
== EXPR_VARIABLE
3200 && f
->sym
->attr
.intent
!= INTENT_IN
&& !f
->sym
->attr
.value
3201 && gfc_is_coindexed (a
->expr
)
3202 && gfc_has_ultimate_allocatable (a
->expr
))
3205 gfc_error ("Coindexed actual argument at %L with allocatable "
3206 "ultimate component to dummy %qs requires either VALUE "
3207 "or INTENT(IN)", &a
->expr
->where
, f
->sym
->name
);
3211 if (f
->sym
->ts
.type
== BT_CLASS
3212 && CLASS_DATA (f
->sym
)->attr
.allocatable
3213 && gfc_is_class_array_ref (a
->expr
, &full_array
)
3217 gfc_error ("Actual CLASS array argument for %qs must be a full "
3218 "array at %L", f
->sym
->name
, &a
->expr
->where
);
3223 if (a
->expr
->expr_type
!= EXPR_NULL
3224 && !compare_allocatable (f
->sym
, a
->expr
))
3227 gfc_error ("Actual argument for %qs must be ALLOCATABLE at %L",
3228 f
->sym
->name
, &a
->expr
->where
);
3232 /* Check intent = OUT/INOUT for definable actual argument. */
3233 if (!in_statement_function
3234 && (f
->sym
->attr
.intent
== INTENT_OUT
3235 || f
->sym
->attr
.intent
== INTENT_INOUT
))
3237 const char* context
= (where
3238 ? _("actual argument to INTENT = OUT/INOUT")
3241 if (((f
->sym
->ts
.type
== BT_CLASS
&& f
->sym
->attr
.class_ok
3242 && CLASS_DATA (f
->sym
)->attr
.class_pointer
)
3243 || (f
->sym
->ts
.type
!= BT_CLASS
&& f
->sym
->attr
.pointer
))
3244 && !gfc_check_vardef_context (a
->expr
, true, false, false, context
))
3246 if (!gfc_check_vardef_context (a
->expr
, false, false, false, context
))
3250 if ((f
->sym
->attr
.intent
== INTENT_OUT
3251 || f
->sym
->attr
.intent
== INTENT_INOUT
3252 || f
->sym
->attr
.volatile_
3253 || f
->sym
->attr
.asynchronous
)
3254 && gfc_has_vector_subscript (a
->expr
))
3257 gfc_error ("Array-section actual argument with vector "
3258 "subscripts at %L is incompatible with INTENT(OUT), "
3259 "INTENT(INOUT), VOLATILE or ASYNCHRONOUS attribute "
3260 "of the dummy argument %qs",
3261 &a
->expr
->where
, f
->sym
->name
);
3265 /* C1232 (R1221) For an actual argument which is an array section or
3266 an assumed-shape array, the dummy argument shall be an assumed-
3267 shape array, if the dummy argument has the VOLATILE attribute. */
3269 if (f
->sym
->attr
.volatile_
3270 && a
->expr
->expr_type
== EXPR_VARIABLE
3271 && a
->expr
->symtree
->n
.sym
->as
3272 && a
->expr
->symtree
->n
.sym
->as
->type
== AS_ASSUMED_SHAPE
3273 && !(f
->sym
->as
&& f
->sym
->as
->type
== AS_ASSUMED_SHAPE
))
3276 gfc_error ("Assumed-shape actual argument at %L is "
3277 "incompatible with the non-assumed-shape "
3278 "dummy argument %qs due to VOLATILE attribute",
3279 &a
->expr
->where
,f
->sym
->name
);
3283 /* Find the last array_ref. */
3284 actual_arr_ref
= NULL
;
3286 actual_arr_ref
= gfc_find_array_ref (a
->expr
, true);
3288 if (f
->sym
->attr
.volatile_
3289 && actual_arr_ref
&& actual_arr_ref
->type
== AR_SECTION
3290 && !(f
->sym
->as
&& f
->sym
->as
->type
== AS_ASSUMED_SHAPE
))
3293 gfc_error ("Array-section actual argument at %L is "
3294 "incompatible with the non-assumed-shape "
3295 "dummy argument %qs due to VOLATILE attribute",
3296 &a
->expr
->where
, f
->sym
->name
);
3300 /* C1233 (R1221) For an actual argument which is a pointer array, the
3301 dummy argument shall be an assumed-shape or pointer array, if the
3302 dummy argument has the VOLATILE attribute. */
3304 if (f
->sym
->attr
.volatile_
3305 && a
->expr
->expr_type
== EXPR_VARIABLE
3306 && a
->expr
->symtree
->n
.sym
->attr
.pointer
3307 && a
->expr
->symtree
->n
.sym
->as
3309 && (f
->sym
->as
->type
== AS_ASSUMED_SHAPE
3310 || f
->sym
->attr
.pointer
)))
3313 gfc_error ("Pointer-array actual argument at %L requires "
3314 "an assumed-shape or pointer-array dummy "
3315 "argument %qs due to VOLATILE attribute",
3316 &a
->expr
->where
,f
->sym
->name
);
3327 /* Make sure missing actual arguments are optional. */
3329 for (f
= formal
; f
; f
= f
->next
, i
++)
3331 if (new_arg
[i
] != NULL
)
3336 gfc_error ("Missing alternate return spec in subroutine call "
3340 if (!f
->sym
->attr
.optional
3341 || (in_statement_function
&& f
->sym
->attr
.optional
))
3344 gfc_error ("Missing actual argument for argument %qs at %L",
3345 f
->sym
->name
, where
);
3350 /* The argument lists are compatible. We now relink a new actual
3351 argument list with null arguments in the right places. The head
3352 of the list remains the head. */
3353 for (i
= 0; i
< n
; i
++)
3354 if (new_arg
[i
] == NULL
)
3355 new_arg
[i
] = gfc_get_actual_arglist ();
3359 std::swap (*new_arg
[0], *actual
);
3360 std::swap (new_arg
[0], new_arg
[na
]);
3363 for (i
= 0; i
< n
- 1; i
++)
3364 new_arg
[i
]->next
= new_arg
[i
+ 1];
3366 new_arg
[i
]->next
= NULL
;
3368 if (*ap
== NULL
&& n
> 0)
3371 /* Note the types of omitted optional arguments. */
3372 for (a
= *ap
, f
= formal
; a
; a
= a
->next
, f
= f
->next
)
3373 if (a
->expr
== NULL
&& a
->label
== NULL
)
3374 a
->missing_arg_type
= f
->sym
->ts
.type
;
3382 gfc_formal_arglist
*f
;
3383 gfc_actual_arglist
*a
;
3387 /* qsort comparison function for argument pairs, with the following
3389 - p->a->expr == NULL
3390 - p->a->expr->expr_type != EXPR_VARIABLE
3391 - by gfc_symbol pointer value (larger first). */
3394 pair_cmp (const void *p1
, const void *p2
)
3396 const gfc_actual_arglist
*a1
, *a2
;
3398 /* *p1 and *p2 are elements of the to-be-sorted array. */
3399 a1
= ((const argpair
*) p1
)->a
;
3400 a2
= ((const argpair
*) p2
)->a
;
3409 if (a1
->expr
->expr_type
!= EXPR_VARIABLE
)
3411 if (a2
->expr
->expr_type
!= EXPR_VARIABLE
)
3415 if (a2
->expr
->expr_type
!= EXPR_VARIABLE
)
3417 if (a1
->expr
->symtree
->n
.sym
> a2
->expr
->symtree
->n
.sym
)
3419 return a1
->expr
->symtree
->n
.sym
< a2
->expr
->symtree
->n
.sym
;
3423 /* Given two expressions from some actual arguments, test whether they
3424 refer to the same expression. The analysis is conservative.
3425 Returning false will produce no warning. */
3428 compare_actual_expr (gfc_expr
*e1
, gfc_expr
*e2
)
3430 const gfc_ref
*r1
, *r2
;
3433 || e1
->expr_type
!= EXPR_VARIABLE
3434 || e2
->expr_type
!= EXPR_VARIABLE
3435 || e1
->symtree
->n
.sym
!= e2
->symtree
->n
.sym
)
3438 /* TODO: improve comparison, see expr.c:show_ref(). */
3439 for (r1
= e1
->ref
, r2
= e2
->ref
; r1
&& r2
; r1
= r1
->next
, r2
= r2
->next
)
3441 if (r1
->type
!= r2
->type
)
3446 if (r1
->u
.ar
.type
!= r2
->u
.ar
.type
)
3448 /* TODO: At the moment, consider only full arrays;
3449 we could do better. */
3450 if (r1
->u
.ar
.type
!= AR_FULL
|| r2
->u
.ar
.type
!= AR_FULL
)
3455 if (r1
->u
.c
.component
!= r2
->u
.c
.component
)
3463 gfc_internal_error ("compare_actual_expr(): Bad component code");
3472 /* Given formal and actual argument lists that correspond to one
3473 another, check that identical actual arguments aren't not
3474 associated with some incompatible INTENTs. */
3477 check_some_aliasing (gfc_formal_arglist
*f
, gfc_actual_arglist
*a
)
3479 sym_intent f1_intent
, f2_intent
;
3480 gfc_formal_arglist
*f1
;
3481 gfc_actual_arglist
*a1
;
3487 for (f1
= f
, a1
= a
;; f1
= f1
->next
, a1
= a1
->next
)
3489 if (f1
== NULL
&& a1
== NULL
)
3491 if (f1
== NULL
|| a1
== NULL
)
3492 gfc_internal_error ("check_some_aliasing(): List mismatch");
3497 p
= XALLOCAVEC (argpair
, n
);
3499 for (i
= 0, f1
= f
, a1
= a
; i
< n
; i
++, f1
= f1
->next
, a1
= a1
->next
)
3505 qsort (p
, n
, sizeof (argpair
), pair_cmp
);
3507 for (i
= 0; i
< n
; i
++)
3510 || p
[i
].a
->expr
->expr_type
!= EXPR_VARIABLE
3511 || p
[i
].a
->expr
->ts
.type
== BT_PROCEDURE
)
3513 f1_intent
= p
[i
].f
->sym
->attr
.intent
;
3514 for (j
= i
+ 1; j
< n
; j
++)
3516 /* Expected order after the sort. */
3517 if (!p
[j
].a
->expr
|| p
[j
].a
->expr
->expr_type
!= EXPR_VARIABLE
)
3518 gfc_internal_error ("check_some_aliasing(): corrupted data");
3520 /* Are the expression the same? */
3521 if (!compare_actual_expr (p
[i
].a
->expr
, p
[j
].a
->expr
))
3523 f2_intent
= p
[j
].f
->sym
->attr
.intent
;
3524 if ((f1_intent
== INTENT_IN
&& f2_intent
== INTENT_OUT
)
3525 || (f1_intent
== INTENT_OUT
&& f2_intent
== INTENT_IN
)
3526 || (f1_intent
== INTENT_OUT
&& f2_intent
== INTENT_OUT
))
3528 gfc_warning (0, "Same actual argument associated with INTENT(%s) "
3529 "argument %qs and INTENT(%s) argument %qs at %L",
3530 gfc_intent_string (f1_intent
), p
[i
].f
->sym
->name
,
3531 gfc_intent_string (f2_intent
), p
[j
].f
->sym
->name
,
3532 &p
[i
].a
->expr
->where
);
3542 /* Given formal and actual argument lists that correspond to one
3543 another, check that they are compatible in the sense that intents
3544 are not mismatched. */
3547 check_intents (gfc_formal_arglist
*f
, gfc_actual_arglist
*a
)
3549 sym_intent f_intent
;
3551 for (;; f
= f
->next
, a
= a
->next
)
3555 if (f
== NULL
&& a
== NULL
)
3557 if (f
== NULL
|| a
== NULL
)
3558 gfc_internal_error ("check_intents(): List mismatch");
3560 if (a
->expr
&& a
->expr
->expr_type
== EXPR_FUNCTION
3561 && a
->expr
->value
.function
.isym
3562 && a
->expr
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
3563 expr
= a
->expr
->value
.function
.actual
->expr
;
3567 if (expr
== NULL
|| expr
->expr_type
!= EXPR_VARIABLE
)
3570 f_intent
= f
->sym
->attr
.intent
;
3572 if (gfc_pure (NULL
) && gfc_impure_variable (expr
->symtree
->n
.sym
))
3574 if ((f
->sym
->ts
.type
== BT_CLASS
&& f
->sym
->attr
.class_ok
3575 && CLASS_DATA (f
->sym
)->attr
.class_pointer
)
3576 || (f
->sym
->ts
.type
!= BT_CLASS
&& f
->sym
->attr
.pointer
))
3578 gfc_error ("Procedure argument at %L is local to a PURE "
3579 "procedure and has the POINTER attribute",
3585 /* Fortran 2008, C1283. */
3586 if (gfc_pure (NULL
) && gfc_is_coindexed (expr
))
3588 if (f_intent
== INTENT_INOUT
|| f_intent
== INTENT_OUT
)
3590 gfc_error ("Coindexed actual argument at %L in PURE procedure "
3591 "is passed to an INTENT(%s) argument",
3592 &expr
->where
, gfc_intent_string (f_intent
));
3596 if ((f
->sym
->ts
.type
== BT_CLASS
&& f
->sym
->attr
.class_ok
3597 && CLASS_DATA (f
->sym
)->attr
.class_pointer
)
3598 || (f
->sym
->ts
.type
!= BT_CLASS
&& f
->sym
->attr
.pointer
))
3600 gfc_error ("Coindexed actual argument at %L in PURE procedure "
3601 "is passed to a POINTER dummy argument",
3607 /* F2008, Section 12.5.2.4. */
3608 if (expr
->ts
.type
== BT_CLASS
&& f
->sym
->ts
.type
== BT_CLASS
3609 && gfc_is_coindexed (expr
))
3611 gfc_error ("Coindexed polymorphic actual argument at %L is passed "
3612 "polymorphic dummy argument %qs",
3613 &expr
->where
, f
->sym
->name
);
3622 /* Check how a procedure is used against its interface. If all goes
3623 well, the actual argument list will also end up being properly
3627 gfc_procedure_use (gfc_symbol
*sym
, gfc_actual_arglist
**ap
, locus
*where
)
3629 gfc_actual_arglist
*a
;
3630 gfc_formal_arglist
*dummy_args
;
3632 /* Warn about calls with an implicit interface. Special case
3633 for calling a ISO_C_BINDING because c_loc and c_funloc
3634 are pseudo-unknown. Additionally, warn about procedures not
3635 explicitly declared at all if requested. */
3636 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
&& !sym
->attr
.is_iso_c
)
3638 if (sym
->ns
->has_implicit_none_export
&& sym
->attr
.proc
== PROC_UNKNOWN
)
3641 = gfc_lookup_function_fuzzy (sym
->name
, sym
->ns
->sym_root
);
3643 gfc_error ("Procedure %qs called at %L is not explicitly declared"
3644 "; did you mean %qs?",
3645 sym
->name
, where
, guessed
);
3647 gfc_error ("Procedure %qs called at %L is not explicitly declared",
3651 if (warn_implicit_interface
)
3652 gfc_warning (OPT_Wimplicit_interface
,
3653 "Procedure %qs called with an implicit interface at %L",
3655 else if (warn_implicit_procedure
&& sym
->attr
.proc
== PROC_UNKNOWN
)
3656 gfc_warning (OPT_Wimplicit_procedure
,
3657 "Procedure %qs called at %L is not explicitly declared",
3661 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
)
3663 if (sym
->attr
.pointer
)
3665 gfc_error ("The pointer object %qs at %L must have an explicit "
3666 "function interface or be declared as array",
3671 if (sym
->attr
.allocatable
&& !sym
->attr
.external
)
3673 gfc_error ("The allocatable object %qs at %L must have an explicit "
3674 "function interface or be declared as array",
3679 if (sym
->attr
.allocatable
)
3681 gfc_error ("Allocatable function %qs at %L must have an explicit "
3682 "function interface", sym
->name
, where
);
3686 for (a
= *ap
; a
; a
= a
->next
)
3688 /* Skip g77 keyword extensions like %VAL, %REF, %LOC. */
3689 if (a
->name
!= NULL
&& a
->name
[0] != '%')
3691 gfc_error ("Keyword argument requires explicit interface "
3692 "for procedure %qs at %L", sym
->name
, &a
->expr
->where
);
3696 /* TS 29113, 6.2. */
3697 if (a
->expr
&& a
->expr
->ts
.type
== BT_ASSUMED
3698 && sym
->intmod_sym_id
!= ISOCBINDING_LOC
)
3700 gfc_error ("Assumed-type argument %s at %L requires an explicit "
3701 "interface", a
->expr
->symtree
->n
.sym
->name
,
3706 /* F2008, C1303 and C1304. */
3708 && (a
->expr
->ts
.type
== BT_DERIVED
|| a
->expr
->ts
.type
== BT_CLASS
)
3709 && ((a
->expr
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
3710 && a
->expr
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
3711 || gfc_expr_attr (a
->expr
).lock_comp
))
3713 gfc_error ("Actual argument of LOCK_TYPE or with LOCK_TYPE "
3714 "component at %L requires an explicit interface for "
3715 "procedure %qs", &a
->expr
->where
, sym
->name
);
3720 && (a
->expr
->ts
.type
== BT_DERIVED
|| a
->expr
->ts
.type
== BT_CLASS
)
3721 && ((a
->expr
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
3722 && a
->expr
->ts
.u
.derived
->intmod_sym_id
3723 == ISOFORTRAN_EVENT_TYPE
)
3724 || gfc_expr_attr (a
->expr
).event_comp
))
3726 gfc_error ("Actual argument of EVENT_TYPE or with EVENT_TYPE "
3727 "component at %L requires an explicit interface for "
3728 "procedure %qs", &a
->expr
->where
, sym
->name
);
3732 if (a
->expr
&& a
->expr
->expr_type
== EXPR_NULL
3733 && a
->expr
->ts
.type
== BT_UNKNOWN
)
3735 gfc_error ("MOLD argument to NULL required at %L", &a
->expr
->where
);
3739 /* TS 29113, C407b. */
3740 if (a
->expr
&& a
->expr
->expr_type
== EXPR_VARIABLE
3741 && symbol_rank (a
->expr
->symtree
->n
.sym
) == -1)
3743 gfc_error ("Assumed-rank argument requires an explicit interface "
3744 "at %L", &a
->expr
->where
);
3752 dummy_args
= gfc_sym_get_dummy_args (sym
);
3754 /* For a statement function, check that types and type parameters of actual
3755 arguments and dummy arguments match. */
3756 if (!compare_actual_formal (ap
, dummy_args
, 0, sym
->attr
.elemental
,
3757 sym
->attr
.proc
== PROC_ST_FUNCTION
, where
))
3760 if (!check_intents (dummy_args
, *ap
))
3764 check_some_aliasing (dummy_args
, *ap
);
3770 /* Check how a procedure pointer component is used against its interface.
3771 If all goes well, the actual argument list will also end up being properly
3772 sorted. Completely analogous to gfc_procedure_use. */
3775 gfc_ppc_use (gfc_component
*comp
, gfc_actual_arglist
**ap
, locus
*where
)
3777 /* Warn about calls with an implicit interface. Special case
3778 for calling a ISO_C_BINDING because c_loc and c_funloc
3779 are pseudo-unknown. */
3780 if (warn_implicit_interface
3781 && comp
->attr
.if_source
== IFSRC_UNKNOWN
3782 && !comp
->attr
.is_iso_c
)
3783 gfc_warning (OPT_Wimplicit_interface
,
3784 "Procedure pointer component %qs called with an implicit "
3785 "interface at %L", comp
->name
, where
);
3787 if (comp
->attr
.if_source
== IFSRC_UNKNOWN
)
3789 gfc_actual_arglist
*a
;
3790 for (a
= *ap
; a
; a
= a
->next
)
3792 /* Skip g77 keyword extensions like %VAL, %REF, %LOC. */
3793 if (a
->name
!= NULL
&& a
->name
[0] != '%')
3795 gfc_error ("Keyword argument requires explicit interface "
3796 "for procedure pointer component %qs at %L",
3797 comp
->name
, &a
->expr
->where
);
3805 if (!compare_actual_formal (ap
, comp
->ts
.interface
->formal
, 0,
3806 comp
->attr
.elemental
, false, where
))
3809 check_intents (comp
->ts
.interface
->formal
, *ap
);
3811 check_some_aliasing (comp
->ts
.interface
->formal
, *ap
);
3815 /* Try if an actual argument list matches the formal list of a symbol,
3816 respecting the symbol's attributes like ELEMENTAL. This is used for
3817 GENERIC resolution. */
3820 gfc_arglist_matches_symbol (gfc_actual_arglist
** args
, gfc_symbol
* sym
)
3822 gfc_formal_arglist
*dummy_args
;
3825 if (sym
->attr
.flavor
!= FL_PROCEDURE
)
3828 dummy_args
= gfc_sym_get_dummy_args (sym
);
3830 r
= !sym
->attr
.elemental
;
3831 if (compare_actual_formal (args
, dummy_args
, r
, !r
, false, NULL
))
3833 check_intents (dummy_args
, *args
);
3835 check_some_aliasing (dummy_args
, *args
);
3843 /* Given an interface pointer and an actual argument list, search for
3844 a formal argument list that matches the actual. If found, returns
3845 a pointer to the symbol of the correct interface. Returns NULL if
3849 gfc_search_interface (gfc_interface
*intr
, int sub_flag
,
3850 gfc_actual_arglist
**ap
)
3852 gfc_symbol
*elem_sym
= NULL
;
3853 gfc_symbol
*null_sym
= NULL
;
3854 locus null_expr_loc
;
3855 gfc_actual_arglist
*a
;
3856 bool has_null_arg
= false;
3858 for (a
= *ap
; a
; a
= a
->next
)
3859 if (a
->expr
&& a
->expr
->expr_type
== EXPR_NULL
3860 && a
->expr
->ts
.type
== BT_UNKNOWN
)
3862 has_null_arg
= true;
3863 null_expr_loc
= a
->expr
->where
;
3867 for (; intr
; intr
= intr
->next
)
3869 if (gfc_fl_struct (intr
->sym
->attr
.flavor
))
3871 if (sub_flag
&& intr
->sym
->attr
.function
)
3873 if (!sub_flag
&& intr
->sym
->attr
.subroutine
)
3876 if (gfc_arglist_matches_symbol (ap
, intr
->sym
))
3878 if (has_null_arg
&& null_sym
)
3880 gfc_error ("MOLD= required in NULL() argument at %L: Ambiguity "
3881 "between specific functions %s and %s",
3882 &null_expr_loc
, null_sym
->name
, intr
->sym
->name
);
3885 else if (has_null_arg
)
3887 null_sym
= intr
->sym
;
3891 /* Satisfy 12.4.4.1 such that an elemental match has lower
3892 weight than a non-elemental match. */
3893 if (intr
->sym
->attr
.elemental
)
3895 elem_sym
= intr
->sym
;
3905 return elem_sym
? elem_sym
: NULL
;
3909 /* Do a brute force recursive search for a symbol. */
3911 static gfc_symtree
*
3912 find_symtree0 (gfc_symtree
*root
, gfc_symbol
*sym
)
3916 if (root
->n
.sym
== sym
)
3921 st
= find_symtree0 (root
->left
, sym
);
3922 if (root
->right
&& ! st
)
3923 st
= find_symtree0 (root
->right
, sym
);
3928 /* Find a symtree for a symbol. */
3931 gfc_find_sym_in_symtree (gfc_symbol
*sym
)
3936 /* First try to find it by name. */
3937 gfc_find_sym_tree (sym
->name
, gfc_current_ns
, 1, &st
);
3938 if (st
&& st
->n
.sym
== sym
)
3941 /* If it's been renamed, resort to a brute-force search. */
3942 /* TODO: avoid having to do this search. If the symbol doesn't exist
3943 in the symtree for the current namespace, it should probably be added. */
3944 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
3946 st
= find_symtree0 (ns
->sym_root
, sym
);
3950 gfc_internal_error ("Unable to find symbol %qs", sym
->name
);
3955 /* See if the arglist to an operator-call contains a derived-type argument
3956 with a matching type-bound operator. If so, return the matching specific
3957 procedure defined as operator-target as well as the base-object to use
3958 (which is the found derived-type argument with operator). The generic
3959 name, if any, is transmitted to the final expression via 'gname'. */
3961 static gfc_typebound_proc
*
3962 matching_typebound_op (gfc_expr
** tb_base
,
3963 gfc_actual_arglist
* args
,
3964 gfc_intrinsic_op op
, const char* uop
,
3965 const char ** gname
)
3967 gfc_actual_arglist
* base
;
3969 for (base
= args
; base
; base
= base
->next
)
3970 if (base
->expr
->ts
.type
== BT_DERIVED
|| base
->expr
->ts
.type
== BT_CLASS
)
3972 gfc_typebound_proc
* tb
;
3973 gfc_symbol
* derived
;
3976 while (base
->expr
->expr_type
== EXPR_OP
3977 && base
->expr
->value
.op
.op
== INTRINSIC_PARENTHESES
)
3978 base
->expr
= base
->expr
->value
.op
.op1
;
3980 if (base
->expr
->ts
.type
== BT_CLASS
)
3982 if (!base
->expr
->ts
.u
.derived
|| CLASS_DATA (base
->expr
) == NULL
3983 || !gfc_expr_attr (base
->expr
).class_ok
)
3985 derived
= CLASS_DATA (base
->expr
)->ts
.u
.derived
;
3988 derived
= base
->expr
->ts
.u
.derived
;
3990 if (op
== INTRINSIC_USER
)
3992 gfc_symtree
* tb_uop
;
3995 tb_uop
= gfc_find_typebound_user_op (derived
, &result
, uop
,
4004 tb
= gfc_find_typebound_intrinsic_op (derived
, &result
, op
,
4007 /* This means we hit a PRIVATE operator which is use-associated and
4008 should thus not be seen. */
4012 /* Look through the super-type hierarchy for a matching specific
4014 for (; tb
; tb
= tb
->overridden
)
4018 gcc_assert (tb
->is_generic
);
4019 for (g
= tb
->u
.generic
; g
; g
= g
->next
)
4022 gfc_actual_arglist
* argcopy
;
4025 gcc_assert (g
->specific
);
4026 if (g
->specific
->error
)
4029 target
= g
->specific
->u
.specific
->n
.sym
;
4031 /* Check if this arglist matches the formal. */
4032 argcopy
= gfc_copy_actual_arglist (args
);
4033 matches
= gfc_arglist_matches_symbol (&argcopy
, target
);
4034 gfc_free_actual_arglist (argcopy
);
4036 /* Return if we found a match. */
4039 *tb_base
= base
->expr
;
4040 *gname
= g
->specific_st
->name
;
4051 /* For the 'actual arglist' of an operator call and a specific typebound
4052 procedure that has been found the target of a type-bound operator, build the
4053 appropriate EXPR_COMPCALL and resolve it. We take this indirection over
4054 type-bound procedures rather than resolving type-bound operators 'directly'
4055 so that we can reuse the existing logic. */
4058 build_compcall_for_operator (gfc_expr
* e
, gfc_actual_arglist
* actual
,
4059 gfc_expr
* base
, gfc_typebound_proc
* target
,
4062 e
->expr_type
= EXPR_COMPCALL
;
4063 e
->value
.compcall
.tbp
= target
;
4064 e
->value
.compcall
.name
= gname
? gname
: "$op";
4065 e
->value
.compcall
.actual
= actual
;
4066 e
->value
.compcall
.base_object
= base
;
4067 e
->value
.compcall
.ignore_pass
= 1;
4068 e
->value
.compcall
.assign
= 0;
4069 if (e
->ts
.type
== BT_UNKNOWN
4070 && target
->function
)
4072 if (target
->is_generic
)
4073 e
->ts
= target
->u
.generic
->specific
->u
.specific
->n
.sym
->ts
;
4075 e
->ts
= target
->u
.specific
->n
.sym
->ts
;
4080 /* This subroutine is called when an expression is being resolved.
4081 The expression node in question is either a user defined operator
4082 or an intrinsic operator with arguments that aren't compatible
4083 with the operator. This subroutine builds an actual argument list
4084 corresponding to the operands, then searches for a compatible
4085 interface. If one is found, the expression node is replaced with
4086 the appropriate function call. We use the 'match' enum to specify
4087 whether a replacement has been made or not, or if an error occurred. */
4090 gfc_extend_expr (gfc_expr
*e
)
4092 gfc_actual_arglist
*actual
;
4098 gfc_typebound_proc
* tbo
;
4103 actual
= gfc_get_actual_arglist ();
4104 actual
->expr
= e
->value
.op
.op1
;
4108 if (e
->value
.op
.op2
!= NULL
)
4110 actual
->next
= gfc_get_actual_arglist ();
4111 actual
->next
->expr
= e
->value
.op
.op2
;
4114 i
= fold_unary_intrinsic (e
->value
.op
.op
);
4116 /* See if we find a matching type-bound operator. */
4117 if (i
== INTRINSIC_USER
)
4118 tbo
= matching_typebound_op (&tb_base
, actual
,
4119 i
, e
->value
.op
.uop
->name
, &gname
);
4123 #define CHECK_OS_COMPARISON(comp) \
4124 case INTRINSIC_##comp: \
4125 case INTRINSIC_##comp##_OS: \
4126 tbo = matching_typebound_op (&tb_base, actual, \
4127 INTRINSIC_##comp, NULL, &gname); \
4129 tbo = matching_typebound_op (&tb_base, actual, \
4130 INTRINSIC_##comp##_OS, NULL, &gname); \
4132 CHECK_OS_COMPARISON(EQ
)
4133 CHECK_OS_COMPARISON(NE
)
4134 CHECK_OS_COMPARISON(GT
)
4135 CHECK_OS_COMPARISON(GE
)
4136 CHECK_OS_COMPARISON(LT
)
4137 CHECK_OS_COMPARISON(LE
)
4138 #undef CHECK_OS_COMPARISON
4141 tbo
= matching_typebound_op (&tb_base
, actual
, i
, NULL
, &gname
);
4145 /* If there is a matching typebound-operator, replace the expression with
4146 a call to it and succeed. */
4149 gcc_assert (tb_base
);
4150 build_compcall_for_operator (e
, actual
, tb_base
, tbo
, gname
);
4152 if (!gfc_resolve_expr (e
))
4158 if (i
== INTRINSIC_USER
)
4160 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
4162 uop
= gfc_find_uop (e
->value
.op
.uop
->name
, ns
);
4166 sym
= gfc_search_interface (uop
->op
, 0, &actual
);
4173 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
4175 /* Due to the distinction between '==' and '.eq.' and friends, one has
4176 to check if either is defined. */
4179 #define CHECK_OS_COMPARISON(comp) \
4180 case INTRINSIC_##comp: \
4181 case INTRINSIC_##comp##_OS: \
4182 sym = gfc_search_interface (ns->op[INTRINSIC_##comp], 0, &actual); \
4184 sym = gfc_search_interface (ns->op[INTRINSIC_##comp##_OS], 0, &actual); \
4186 CHECK_OS_COMPARISON(EQ
)
4187 CHECK_OS_COMPARISON(NE
)
4188 CHECK_OS_COMPARISON(GT
)
4189 CHECK_OS_COMPARISON(GE
)
4190 CHECK_OS_COMPARISON(LT
)
4191 CHECK_OS_COMPARISON(LE
)
4192 #undef CHECK_OS_COMPARISON
4195 sym
= gfc_search_interface (ns
->op
[i
], 0, &actual
);
4203 /* TODO: Do an ambiguity-check and error if multiple matching interfaces are
4204 found rather than just taking the first one and not checking further. */
4208 /* Don't use gfc_free_actual_arglist(). */
4209 free (actual
->next
);
4214 /* Change the expression node to a function call. */
4215 e
->expr_type
= EXPR_FUNCTION
;
4216 e
->symtree
= gfc_find_sym_in_symtree (sym
);
4217 e
->value
.function
.actual
= actual
;
4218 e
->value
.function
.esym
= NULL
;
4219 e
->value
.function
.isym
= NULL
;
4220 e
->value
.function
.name
= NULL
;
4221 e
->user_operator
= 1;
4223 if (!gfc_resolve_expr (e
))
4230 /* Tries to replace an assignment code node with a subroutine call to the
4231 subroutine associated with the assignment operator. Return true if the node
4232 was replaced. On false, no error is generated. */
4235 gfc_extend_assign (gfc_code
*c
, gfc_namespace
*ns
)
4237 gfc_actual_arglist
*actual
;
4238 gfc_expr
*lhs
, *rhs
, *tb_base
;
4239 gfc_symbol
*sym
= NULL
;
4240 const char *gname
= NULL
;
4241 gfc_typebound_proc
* tbo
;
4246 /* Don't allow an intrinsic assignment to be replaced. */
4247 if (lhs
->ts
.type
!= BT_DERIVED
&& lhs
->ts
.type
!= BT_CLASS
4248 && (rhs
->rank
== 0 || rhs
->rank
== lhs
->rank
)
4249 && (lhs
->ts
.type
== rhs
->ts
.type
4250 || (gfc_numeric_ts (&lhs
->ts
) && gfc_numeric_ts (&rhs
->ts
))))
4253 actual
= gfc_get_actual_arglist ();
4256 actual
->next
= gfc_get_actual_arglist ();
4257 actual
->next
->expr
= rhs
;
4259 /* TODO: Ambiguity-check, see above for gfc_extend_expr. */
4261 /* See if we find a matching type-bound assignment. */
4262 tbo
= matching_typebound_op (&tb_base
, actual
, INTRINSIC_ASSIGN
,
4267 /* Success: Replace the expression with a type-bound call. */
4268 gcc_assert (tb_base
);
4269 c
->expr1
= gfc_get_expr ();
4270 build_compcall_for_operator (c
->expr1
, actual
, tb_base
, tbo
, gname
);
4271 c
->expr1
->value
.compcall
.assign
= 1;
4272 c
->expr1
->where
= c
->loc
;
4274 c
->op
= EXEC_COMPCALL
;
4278 /* See if we find an 'ordinary' (non-typebound) assignment procedure. */
4279 for (; ns
; ns
= ns
->parent
)
4281 sym
= gfc_search_interface (ns
->op
[INTRINSIC_ASSIGN
], 1, &actual
);
4288 /* Success: Replace the assignment with the call. */
4289 c
->op
= EXEC_ASSIGN_CALL
;
4290 c
->symtree
= gfc_find_sym_in_symtree (sym
);
4293 c
->ext
.actual
= actual
;
4297 /* Failure: No assignment procedure found. */
4298 free (actual
->next
);
4304 /* Make sure that the interface just parsed is not already present in
4305 the given interface list. Ambiguity isn't checked yet since module
4306 procedures can be present without interfaces. */
4309 gfc_check_new_interface (gfc_interface
*base
, gfc_symbol
*new_sym
, locus loc
)
4313 for (ip
= base
; ip
; ip
= ip
->next
)
4315 if (ip
->sym
== new_sym
)
4317 gfc_error ("Entity %qs at %L is already present in the interface",
4318 new_sym
->name
, &loc
);
4327 /* Add a symbol to the current interface. */
4330 gfc_add_interface (gfc_symbol
*new_sym
)
4332 gfc_interface
**head
, *intr
;
4336 switch (current_interface
.type
)
4338 case INTERFACE_NAMELESS
:
4339 case INTERFACE_ABSTRACT
:
4342 case INTERFACE_INTRINSIC_OP
:
4343 for (ns
= current_interface
.ns
; ns
; ns
= ns
->parent
)
4344 switch (current_interface
.op
)
4347 case INTRINSIC_EQ_OS
:
4348 if (!gfc_check_new_interface (ns
->op
[INTRINSIC_EQ
], new_sym
,
4350 || !gfc_check_new_interface (ns
->op
[INTRINSIC_EQ_OS
],
4351 new_sym
, gfc_current_locus
))
4356 case INTRINSIC_NE_OS
:
4357 if (!gfc_check_new_interface (ns
->op
[INTRINSIC_NE
], new_sym
,
4359 || !gfc_check_new_interface (ns
->op
[INTRINSIC_NE_OS
],
4360 new_sym
, gfc_current_locus
))
4365 case INTRINSIC_GT_OS
:
4366 if (!gfc_check_new_interface (ns
->op
[INTRINSIC_GT
],
4367 new_sym
, gfc_current_locus
)
4368 || !gfc_check_new_interface (ns
->op
[INTRINSIC_GT_OS
],
4369 new_sym
, gfc_current_locus
))
4374 case INTRINSIC_GE_OS
:
4375 if (!gfc_check_new_interface (ns
->op
[INTRINSIC_GE
],
4376 new_sym
, gfc_current_locus
)
4377 || !gfc_check_new_interface (ns
->op
[INTRINSIC_GE_OS
],
4378 new_sym
, gfc_current_locus
))
4383 case INTRINSIC_LT_OS
:
4384 if (!gfc_check_new_interface (ns
->op
[INTRINSIC_LT
],
4385 new_sym
, gfc_current_locus
)
4386 || !gfc_check_new_interface (ns
->op
[INTRINSIC_LT_OS
],
4387 new_sym
, gfc_current_locus
))
4392 case INTRINSIC_LE_OS
:
4393 if (!gfc_check_new_interface (ns
->op
[INTRINSIC_LE
],
4394 new_sym
, gfc_current_locus
)
4395 || !gfc_check_new_interface (ns
->op
[INTRINSIC_LE_OS
],
4396 new_sym
, gfc_current_locus
))
4401 if (!gfc_check_new_interface (ns
->op
[current_interface
.op
],
4402 new_sym
, gfc_current_locus
))
4406 head
= ¤t_interface
.ns
->op
[current_interface
.op
];
4409 case INTERFACE_GENERIC
:
4410 case INTERFACE_DTIO
:
4411 for (ns
= current_interface
.ns
; ns
; ns
= ns
->parent
)
4413 gfc_find_symbol (current_interface
.sym
->name
, ns
, 0, &sym
);
4417 if (!gfc_check_new_interface (sym
->generic
,
4418 new_sym
, gfc_current_locus
))
4422 head
= ¤t_interface
.sym
->generic
;
4425 case INTERFACE_USER_OP
:
4426 if (!gfc_check_new_interface (current_interface
.uop
->op
,
4427 new_sym
, gfc_current_locus
))
4430 head
= ¤t_interface
.uop
->op
;
4434 gfc_internal_error ("gfc_add_interface(): Bad interface type");
4437 intr
= gfc_get_interface ();
4438 intr
->sym
= new_sym
;
4439 intr
->where
= gfc_current_locus
;
4449 gfc_current_interface_head (void)
4451 switch (current_interface
.type
)
4453 case INTERFACE_INTRINSIC_OP
:
4454 return current_interface
.ns
->op
[current_interface
.op
];
4456 case INTERFACE_GENERIC
:
4457 case INTERFACE_DTIO
:
4458 return current_interface
.sym
->generic
;
4460 case INTERFACE_USER_OP
:
4461 return current_interface
.uop
->op
;
4470 gfc_set_current_interface_head (gfc_interface
*i
)
4472 switch (current_interface
.type
)
4474 case INTERFACE_INTRINSIC_OP
:
4475 current_interface
.ns
->op
[current_interface
.op
] = i
;
4478 case INTERFACE_GENERIC
:
4479 case INTERFACE_DTIO
:
4480 current_interface
.sym
->generic
= i
;
4483 case INTERFACE_USER_OP
:
4484 current_interface
.uop
->op
= i
;
4493 /* Gets rid of a formal argument list. We do not free symbols.
4494 Symbols are freed when a namespace is freed. */
4497 gfc_free_formal_arglist (gfc_formal_arglist
*p
)
4499 gfc_formal_arglist
*q
;
4509 /* Check that it is ok for the type-bound procedure 'proc' to override the
4510 procedure 'old', cf. F08:4.5.7.3. */
4513 gfc_check_typebound_override (gfc_symtree
* proc
, gfc_symtree
* old
)
4516 gfc_symbol
*proc_target
, *old_target
;
4517 unsigned proc_pass_arg
, old_pass_arg
, argpos
;
4518 gfc_formal_arglist
*proc_formal
, *old_formal
;
4522 /* This procedure should only be called for non-GENERIC proc. */
4523 gcc_assert (!proc
->n
.tb
->is_generic
);
4525 /* If the overwritten procedure is GENERIC, this is an error. */
4526 if (old
->n
.tb
->is_generic
)
4528 gfc_error ("Can't overwrite GENERIC %qs at %L",
4529 old
->name
, &proc
->n
.tb
->where
);
4533 where
= proc
->n
.tb
->where
;
4534 proc_target
= proc
->n
.tb
->u
.specific
->n
.sym
;
4535 old_target
= old
->n
.tb
->u
.specific
->n
.sym
;
4537 /* Check that overridden binding is not NON_OVERRIDABLE. */
4538 if (old
->n
.tb
->non_overridable
)
4540 gfc_error ("%qs at %L overrides a procedure binding declared"
4541 " NON_OVERRIDABLE", proc
->name
, &where
);
4545 /* It's an error to override a non-DEFERRED procedure with a DEFERRED one. */
4546 if (!old
->n
.tb
->deferred
&& proc
->n
.tb
->deferred
)
4548 gfc_error ("%qs at %L must not be DEFERRED as it overrides a"
4549 " non-DEFERRED binding", proc
->name
, &where
);
4553 /* If the overridden binding is PURE, the overriding must be, too. */
4554 if (old_target
->attr
.pure
&& !proc_target
->attr
.pure
)
4556 gfc_error ("%qs at %L overrides a PURE procedure and must also be PURE",
4557 proc
->name
, &where
);
4561 /* If the overridden binding is ELEMENTAL, the overriding must be, too. If it
4562 is not, the overriding must not be either. */
4563 if (old_target
->attr
.elemental
&& !proc_target
->attr
.elemental
)
4565 gfc_error ("%qs at %L overrides an ELEMENTAL procedure and must also be"
4566 " ELEMENTAL", proc
->name
, &where
);
4569 if (!old_target
->attr
.elemental
&& proc_target
->attr
.elemental
)
4571 gfc_error ("%qs at %L overrides a non-ELEMENTAL procedure and must not"
4572 " be ELEMENTAL, either", proc
->name
, &where
);
4576 /* If the overridden binding is a SUBROUTINE, the overriding must also be a
4578 if (old_target
->attr
.subroutine
&& !proc_target
->attr
.subroutine
)
4580 gfc_error ("%qs at %L overrides a SUBROUTINE and must also be a"
4581 " SUBROUTINE", proc
->name
, &where
);
4585 /* If the overridden binding is a FUNCTION, the overriding must also be a
4586 FUNCTION and have the same characteristics. */
4587 if (old_target
->attr
.function
)
4589 if (!proc_target
->attr
.function
)
4591 gfc_error ("%qs at %L overrides a FUNCTION and must also be a"
4592 " FUNCTION", proc
->name
, &where
);
4596 if (!gfc_check_result_characteristics (proc_target
, old_target
,
4599 gfc_error ("Result mismatch for the overriding procedure "
4600 "%qs at %L: %s", proc
->name
, &where
, err
);
4605 /* If the overridden binding is PUBLIC, the overriding one must not be
4607 if (old
->n
.tb
->access
== ACCESS_PUBLIC
4608 && proc
->n
.tb
->access
== ACCESS_PRIVATE
)
4610 gfc_error ("%qs at %L overrides a PUBLIC procedure and must not be"
4611 " PRIVATE", proc
->name
, &where
);
4615 /* Compare the formal argument lists of both procedures. This is also abused
4616 to find the position of the passed-object dummy arguments of both
4617 bindings as at least the overridden one might not yet be resolved and we
4618 need those positions in the check below. */
4619 proc_pass_arg
= old_pass_arg
= 0;
4620 if (!proc
->n
.tb
->nopass
&& !proc
->n
.tb
->pass_arg
)
4622 if (!old
->n
.tb
->nopass
&& !old
->n
.tb
->pass_arg
)
4625 proc_formal
= gfc_sym_get_dummy_args (proc_target
);
4626 old_formal
= gfc_sym_get_dummy_args (old_target
);
4627 for ( ; proc_formal
&& old_formal
;
4628 proc_formal
= proc_formal
->next
, old_formal
= old_formal
->next
)
4630 if (proc
->n
.tb
->pass_arg
4631 && !strcmp (proc
->n
.tb
->pass_arg
, proc_formal
->sym
->name
))
4632 proc_pass_arg
= argpos
;
4633 if (old
->n
.tb
->pass_arg
4634 && !strcmp (old
->n
.tb
->pass_arg
, old_formal
->sym
->name
))
4635 old_pass_arg
= argpos
;
4637 /* Check that the names correspond. */
4638 if (strcmp (proc_formal
->sym
->name
, old_formal
->sym
->name
))
4640 gfc_error ("Dummy argument %qs of %qs at %L should be named %qs as"
4641 " to match the corresponding argument of the overridden"
4642 " procedure", proc_formal
->sym
->name
, proc
->name
, &where
,
4643 old_formal
->sym
->name
);
4647 check_type
= proc_pass_arg
!= argpos
&& old_pass_arg
!= argpos
;
4648 if (!gfc_check_dummy_characteristics (proc_formal
->sym
, old_formal
->sym
,
4649 check_type
, err
, sizeof(err
)))
4651 gfc_error_opt (OPT_Wargument_mismatch
,
4652 "Argument mismatch for the overriding procedure "
4653 "%qs at %L: %s", proc
->name
, &where
, err
);
4659 if (proc_formal
|| old_formal
)
4661 gfc_error ("%qs at %L must have the same number of formal arguments as"
4662 " the overridden procedure", proc
->name
, &where
);
4666 /* If the overridden binding is NOPASS, the overriding one must also be
4668 if (old
->n
.tb
->nopass
&& !proc
->n
.tb
->nopass
)
4670 gfc_error ("%qs at %L overrides a NOPASS binding and must also be"
4671 " NOPASS", proc
->name
, &where
);
4675 /* If the overridden binding is PASS(x), the overriding one must also be
4676 PASS and the passed-object dummy arguments must correspond. */
4677 if (!old
->n
.tb
->nopass
)
4679 if (proc
->n
.tb
->nopass
)
4681 gfc_error ("%qs at %L overrides a binding with PASS and must also be"
4682 " PASS", proc
->name
, &where
);
4686 if (proc_pass_arg
!= old_pass_arg
)
4688 gfc_error ("Passed-object dummy argument of %qs at %L must be at"
4689 " the same position as the passed-object dummy argument of"
4690 " the overridden procedure", proc
->name
, &where
);
4699 /* The following three functions check that the formal arguments
4700 of user defined derived type IO procedures are compliant with
4701 the requirements of the standard, see F03:9.5.3.7.2 (F08:9.6.4.8.3). */
4704 check_dtio_arg_TKR_intent (gfc_symbol
*fsym
, bool typebound
, bt type
,
4705 int kind
, int rank
, sym_intent intent
)
4707 if (fsym
->ts
.type
!= type
)
4709 gfc_error ("DTIO dummy argument at %L must be of type %s",
4710 &fsym
->declared_at
, gfc_basic_typename (type
));
4714 if (fsym
->ts
.type
!= BT_CLASS
&& fsym
->ts
.type
!= BT_DERIVED
4715 && fsym
->ts
.kind
!= kind
)
4716 gfc_error ("DTIO dummy argument at %L must be of KIND = %d",
4717 &fsym
->declared_at
, kind
);
4721 && (((type
== BT_CLASS
) && CLASS_DATA (fsym
)->attr
.dimension
)
4722 || ((type
!= BT_CLASS
) && fsym
->attr
.dimension
)))
4723 gfc_error ("DTIO dummy argument at %L must be a scalar",
4724 &fsym
->declared_at
);
4726 && (fsym
->as
== NULL
|| fsym
->as
->type
!= AS_ASSUMED_SHAPE
))
4727 gfc_error ("DTIO dummy argument at %L must be an "
4728 "ASSUMED SHAPE ARRAY", &fsym
->declared_at
);
4730 if (type
== BT_CHARACTER
&& fsym
->ts
.u
.cl
->length
!= NULL
)
4731 gfc_error ("DTIO character argument at %L must have assumed length",
4732 &fsym
->declared_at
);
4734 if (fsym
->attr
.intent
!= intent
)
4735 gfc_error ("DTIO dummy argument at %L must have INTENT %s",
4736 &fsym
->declared_at
, gfc_code2string (intents
, (int)intent
));
4742 check_dtio_interface1 (gfc_symbol
*derived
, gfc_symtree
*tb_io_st
,
4743 bool typebound
, bool formatted
, int code
)
4745 gfc_symbol
*dtio_sub
, *generic_proc
, *fsym
;
4746 gfc_typebound_proc
*tb_io_proc
, *specific_proc
;
4747 gfc_interface
*intr
;
4748 gfc_formal_arglist
*formal
;
4751 bool read
= ((dtio_codes
)code
== DTIO_RF
)
4752 || ((dtio_codes
)code
== DTIO_RUF
);
4760 /* Typebound DTIO binding. */
4761 tb_io_proc
= tb_io_st
->n
.tb
;
4762 if (tb_io_proc
== NULL
)
4765 gcc_assert (tb_io_proc
->is_generic
);
4767 specific_proc
= tb_io_proc
->u
.generic
->specific
;
4768 if (specific_proc
== NULL
|| specific_proc
->is_generic
)
4771 dtio_sub
= specific_proc
->u
.specific
->n
.sym
;
4775 generic_proc
= tb_io_st
->n
.sym
;
4776 if (generic_proc
== NULL
|| generic_proc
->generic
== NULL
)
4779 for (intr
= tb_io_st
->n
.sym
->generic
; intr
; intr
= intr
->next
)
4781 if (intr
->sym
&& intr
->sym
->formal
&& intr
->sym
->formal
->sym
4782 && ((intr
->sym
->formal
->sym
->ts
.type
== BT_CLASS
4783 && CLASS_DATA (intr
->sym
->formal
->sym
)->ts
.u
.derived
4785 || (intr
->sym
->formal
->sym
->ts
.type
== BT_DERIVED
4786 && intr
->sym
->formal
->sym
->ts
.u
.derived
== derived
)))
4788 dtio_sub
= intr
->sym
;
4791 else if (intr
->sym
&& intr
->sym
->formal
&& !intr
->sym
->formal
->sym
)
4793 gfc_error ("Alternate return at %L is not permitted in a DTIO "
4794 "procedure", &intr
->sym
->declared_at
);
4799 if (dtio_sub
== NULL
)
4803 gcc_assert (dtio_sub
);
4804 if (!dtio_sub
->attr
.subroutine
)
4805 gfc_error ("DTIO procedure %qs at %L must be a subroutine",
4806 dtio_sub
->name
, &dtio_sub
->declared_at
);
4809 for (formal
= dtio_sub
->formal
; formal
; formal
= formal
->next
)
4812 if (arg_num
< (formatted
? 6 : 4))
4814 gfc_error ("Too few dummy arguments in DTIO procedure %qs at %L",
4815 dtio_sub
->name
, &dtio_sub
->declared_at
);
4819 if (arg_num
> (formatted
? 6 : 4))
4821 gfc_error ("Too many dummy arguments in DTIO procedure %qs at %L",
4822 dtio_sub
->name
, &dtio_sub
->declared_at
);
4827 /* Now go through the formal arglist. */
4829 for (formal
= dtio_sub
->formal
; formal
; formal
= formal
->next
, arg_num
++)
4831 if (!formatted
&& arg_num
== 3)
4837 gfc_error ("Alternate return at %L is not permitted in a DTIO "
4838 "procedure", &dtio_sub
->declared_at
);
4845 type
= derived
->attr
.sequence
|| derived
->attr
.is_bind_c
?
4846 BT_DERIVED
: BT_CLASS
;
4848 intent
= read
? INTENT_INOUT
: INTENT_IN
;
4849 check_dtio_arg_TKR_intent (fsym
, typebound
, type
, kind
,
4855 kind
= gfc_default_integer_kind
;
4857 check_dtio_arg_TKR_intent (fsym
, typebound
, type
, kind
,
4860 case(3): /* IOTYPE */
4861 type
= BT_CHARACTER
;
4862 kind
= gfc_default_character_kind
;
4864 check_dtio_arg_TKR_intent (fsym
, typebound
, type
, kind
,
4867 case(4): /* VLIST */
4869 kind
= gfc_default_integer_kind
;
4871 check_dtio_arg_TKR_intent (fsym
, typebound
, type
, kind
,
4874 case(5): /* IOSTAT */
4876 kind
= gfc_default_integer_kind
;
4877 intent
= INTENT_OUT
;
4878 check_dtio_arg_TKR_intent (fsym
, typebound
, type
, kind
,
4881 case(6): /* IOMSG */
4882 type
= BT_CHARACTER
;
4883 kind
= gfc_default_character_kind
;
4884 intent
= INTENT_INOUT
;
4885 check_dtio_arg_TKR_intent (fsym
, typebound
, type
, kind
,
4892 derived
->attr
.has_dtio_procs
= 1;
4897 gfc_check_dtio_interfaces (gfc_symbol
*derived
)
4899 gfc_symtree
*tb_io_st
;
4904 if (derived
->attr
.is_class
== 1 || derived
->attr
.vtype
== 1)
4907 /* Check typebound DTIO bindings. */
4908 for (code
= 0; code
< 4; code
++)
4910 formatted
= ((dtio_codes
)code
== DTIO_RF
)
4911 || ((dtio_codes
)code
== DTIO_WF
);
4913 tb_io_st
= gfc_find_typebound_proc (derived
, &t
,
4914 gfc_code2string (dtio_procs
, code
),
4915 true, &derived
->declared_at
);
4916 if (tb_io_st
!= NULL
)
4917 check_dtio_interface1 (derived
, tb_io_st
, true, formatted
, code
);
4920 /* Check generic DTIO interfaces. */
4921 for (code
= 0; code
< 4; code
++)
4923 formatted
= ((dtio_codes
)code
== DTIO_RF
)
4924 || ((dtio_codes
)code
== DTIO_WF
);
4926 tb_io_st
= gfc_find_symtree (derived
->ns
->sym_root
,
4927 gfc_code2string (dtio_procs
, code
));
4928 if (tb_io_st
!= NULL
)
4929 check_dtio_interface1 (derived
, tb_io_st
, false, formatted
, code
);
4935 gfc_find_typebound_dtio_proc (gfc_symbol
*derived
, bool write
, bool formatted
)
4937 gfc_symtree
*tb_io_st
= NULL
;
4940 if (!derived
|| !derived
->resolved
|| derived
->attr
.flavor
!= FL_DERIVED
)
4943 /* Try to find a typebound DTIO binding. */
4944 if (formatted
== true)
4947 tb_io_st
= gfc_find_typebound_proc (derived
, &t
,
4948 gfc_code2string (dtio_procs
,
4951 &derived
->declared_at
);
4953 tb_io_st
= gfc_find_typebound_proc (derived
, &t
,
4954 gfc_code2string (dtio_procs
,
4957 &derived
->declared_at
);
4962 tb_io_st
= gfc_find_typebound_proc (derived
, &t
,
4963 gfc_code2string (dtio_procs
,
4966 &derived
->declared_at
);
4968 tb_io_st
= gfc_find_typebound_proc (derived
, &t
,
4969 gfc_code2string (dtio_procs
,
4972 &derived
->declared_at
);
4979 gfc_find_specific_dtio_proc (gfc_symbol
*derived
, bool write
, bool formatted
)
4981 gfc_symtree
*tb_io_st
= NULL
;
4982 gfc_symbol
*dtio_sub
= NULL
;
4983 gfc_symbol
*extended
;
4984 gfc_typebound_proc
*tb_io_proc
, *specific_proc
;
4986 tb_io_st
= gfc_find_typebound_dtio_proc (derived
, write
, formatted
);
4988 if (tb_io_st
!= NULL
)
4990 const char *genname
;
4993 tb_io_proc
= tb_io_st
->n
.tb
;
4994 gcc_assert (tb_io_proc
!= NULL
);
4995 gcc_assert (tb_io_proc
->is_generic
);
4996 gcc_assert (tb_io_proc
->u
.generic
->next
== NULL
);
4998 specific_proc
= tb_io_proc
->u
.generic
->specific
;
4999 gcc_assert (!specific_proc
->is_generic
);
5001 /* Go back and make sure that we have the right specific procedure.
5002 Here we most likely have a procedure from the parent type, which
5003 can be overridden in extensions. */
5004 genname
= tb_io_proc
->u
.generic
->specific_st
->name
;
5005 st
= gfc_find_typebound_proc (derived
, NULL
, genname
,
5006 true, &tb_io_proc
->where
);
5008 dtio_sub
= st
->n
.tb
->u
.specific
->n
.sym
;
5010 dtio_sub
= specific_proc
->u
.specific
->n
.sym
;
5015 /* If there is not a typebound binding, look for a generic
5017 for (extended
= derived
; extended
;
5018 extended
= gfc_get_derived_super_type (extended
))
5020 if (extended
== NULL
|| extended
->ns
== NULL
5021 || extended
->attr
.flavor
== FL_UNKNOWN
)
5024 if (formatted
== true)
5027 tb_io_st
= gfc_find_symtree (extended
->ns
->sym_root
,
5028 gfc_code2string (dtio_procs
,
5031 tb_io_st
= gfc_find_symtree (extended
->ns
->sym_root
,
5032 gfc_code2string (dtio_procs
,
5038 tb_io_st
= gfc_find_symtree (extended
->ns
->sym_root
,
5039 gfc_code2string (dtio_procs
,
5042 tb_io_st
= gfc_find_symtree (extended
->ns
->sym_root
,
5043 gfc_code2string (dtio_procs
,
5047 if (tb_io_st
!= NULL
5049 && tb_io_st
->n
.sym
->generic
)
5051 for (gfc_interface
*intr
= tb_io_st
->n
.sym
->generic
;
5052 intr
&& intr
->sym
; intr
= intr
->next
)
5054 if (intr
->sym
->formal
)
5056 gfc_symbol
*fsym
= intr
->sym
->formal
->sym
;
5057 if ((fsym
->ts
.type
== BT_CLASS
5058 && CLASS_DATA (fsym
)->ts
.u
.derived
== extended
)
5059 || (fsym
->ts
.type
== BT_DERIVED
5060 && fsym
->ts
.u
.derived
== extended
))
5062 dtio_sub
= intr
->sym
;
5071 if (dtio_sub
&& derived
!= CLASS_DATA (dtio_sub
->formal
->sym
)->ts
.u
.derived
)
5072 gfc_find_derived_vtab (derived
);