1 /* Deal with interfaces.
2 Copyright (C) 2000-2017 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
) ? CLASS_DATA (s1
)->as
: s1
->as
;
758 as2
= (s2
->ts
.type
== BT_CLASS
) ? CLASS_DATA (s2
)->as
: s2
->as
;
760 r1
= as1
? as1
->rank
: 0;
761 r2
= as2
? as2
->rank
: 0;
763 if (r1
!= r2
&& (!as2
|| as2
->type
!= AS_ASSUMED_RANK
))
764 return false; /* Ranks differ. */
770 /* Given two symbols that are formal arguments, compare their ranks
771 and types. Returns true if they have the same rank and type,
775 compare_type_rank (gfc_symbol
*s1
, gfc_symbol
*s2
)
777 return compare_type (s1
, s2
) && compare_rank (s1
, s2
);
781 /* Given two symbols that are formal arguments, compare their types
782 and rank and their formal interfaces if they are both dummy
783 procedures. Returns true if the same, false if different. */
786 compare_type_rank_if (gfc_symbol
*s1
, gfc_symbol
*s2
)
788 if (s1
== NULL
|| s2
== NULL
)
794 if (s1
->attr
.flavor
!= FL_PROCEDURE
&& s2
->attr
.flavor
!= FL_PROCEDURE
)
795 return compare_type_rank (s1
, s2
);
797 if (s1
->attr
.flavor
!= FL_PROCEDURE
|| s2
->attr
.flavor
!= FL_PROCEDURE
)
800 /* At this point, both symbols are procedures. It can happen that
801 external procedures are compared, where one is identified by usage
802 to be a function or subroutine but the other is not. Check TKR
803 nonetheless for these cases. */
804 if (s1
->attr
.function
== 0 && s1
->attr
.subroutine
== 0)
805 return s1
->attr
.external
? compare_type_rank (s1
, s2
) : false;
807 if (s2
->attr
.function
== 0 && s2
->attr
.subroutine
== 0)
808 return s2
->attr
.external
? compare_type_rank (s1
, s2
) : false;
810 /* Now the type of procedure has been identified. */
811 if (s1
->attr
.function
!= s2
->attr
.function
812 || s1
->attr
.subroutine
!= s2
->attr
.subroutine
)
815 if (s1
->attr
.function
&& !compare_type_rank (s1
, s2
))
818 /* Originally, gfortran recursed here to check the interfaces of passed
819 procedures. This is explicitly not required by the standard. */
824 /* Given a formal argument list and a keyword name, search the list
825 for that keyword. Returns the correct symbol node if found, NULL
829 find_keyword_arg (const char *name
, gfc_formal_arglist
*f
)
831 for (; f
; f
= f
->next
)
832 if (strcmp (f
->sym
->name
, name
) == 0)
839 /******** Interface checking subroutines **********/
842 /* Given an operator interface and the operator, make sure that all
843 interfaces for that operator are legal. */
846 gfc_check_operator_interface (gfc_symbol
*sym
, gfc_intrinsic_op op
,
849 gfc_formal_arglist
*formal
;
852 int args
, r1
, r2
, k1
, k2
;
857 t1
= t2
= BT_UNKNOWN
;
858 i1
= i2
= INTENT_UNKNOWN
;
862 for (formal
= gfc_sym_get_dummy_args (sym
); formal
; formal
= formal
->next
)
864 gfc_symbol
*fsym
= formal
->sym
;
867 gfc_error ("Alternate return cannot appear in operator "
868 "interface at %L", &sym
->declared_at
);
874 i1
= fsym
->attr
.intent
;
875 r1
= (fsym
->as
!= NULL
) ? fsym
->as
->rank
: 0;
881 i2
= fsym
->attr
.intent
;
882 r2
= (fsym
->as
!= NULL
) ? fsym
->as
->rank
: 0;
888 /* Only +, - and .not. can be unary operators.
889 .not. cannot be a binary operator. */
890 if (args
== 0 || args
> 2 || (args
== 1 && op
!= INTRINSIC_PLUS
891 && op
!= INTRINSIC_MINUS
892 && op
!= INTRINSIC_NOT
)
893 || (args
== 2 && op
== INTRINSIC_NOT
))
895 if (op
== INTRINSIC_ASSIGN
)
896 gfc_error ("Assignment operator interface at %L must have "
897 "two arguments", &sym
->declared_at
);
899 gfc_error ("Operator interface at %L has the wrong number of arguments",
904 /* Check that intrinsics are mapped to functions, except
905 INTRINSIC_ASSIGN which should map to a subroutine. */
906 if (op
== INTRINSIC_ASSIGN
)
908 gfc_formal_arglist
*dummy_args
;
910 if (!sym
->attr
.subroutine
)
912 gfc_error ("Assignment operator interface at %L must be "
913 "a SUBROUTINE", &sym
->declared_at
);
917 /* Allowed are (per F2003, 12.3.2.1.2 Defined assignments):
918 - First argument an array with different rank than second,
919 - First argument is a scalar and second an array,
920 - Types and kinds do not conform, or
921 - First argument is of derived type. */
922 dummy_args
= gfc_sym_get_dummy_args (sym
);
923 if (dummy_args
->sym
->ts
.type
!= BT_DERIVED
924 && dummy_args
->sym
->ts
.type
!= BT_CLASS
925 && (r2
== 0 || r1
== r2
)
926 && (dummy_args
->sym
->ts
.type
== dummy_args
->next
->sym
->ts
.type
927 || (gfc_numeric_ts (&dummy_args
->sym
->ts
)
928 && gfc_numeric_ts (&dummy_args
->next
->sym
->ts
))))
930 gfc_error ("Assignment operator interface at %L must not redefine "
931 "an INTRINSIC type assignment", &sym
->declared_at
);
937 if (!sym
->attr
.function
)
939 gfc_error ("Intrinsic operator interface at %L must be a FUNCTION",
945 /* Check intents on operator interfaces. */
946 if (op
== INTRINSIC_ASSIGN
)
948 if (i1
!= INTENT_OUT
&& i1
!= INTENT_INOUT
)
950 gfc_error ("First argument of defined assignment at %L must be "
951 "INTENT(OUT) or INTENT(INOUT)", &sym
->declared_at
);
957 gfc_error ("Second argument of defined assignment at %L must be "
958 "INTENT(IN)", &sym
->declared_at
);
966 gfc_error ("First argument of operator interface at %L must be "
967 "INTENT(IN)", &sym
->declared_at
);
971 if (args
== 2 && i2
!= INTENT_IN
)
973 gfc_error ("Second argument of operator interface at %L must be "
974 "INTENT(IN)", &sym
->declared_at
);
979 /* From now on, all we have to do is check that the operator definition
980 doesn't conflict with an intrinsic operator. The rules for this
981 game are defined in 7.1.2 and 7.1.3 of both F95 and F2003 standards,
982 as well as 12.3.2.1.1 of Fortran 2003:
984 "If the operator is an intrinsic-operator (R310), the number of
985 function arguments shall be consistent with the intrinsic uses of
986 that operator, and the types, kind type parameters, or ranks of the
987 dummy arguments shall differ from those required for the intrinsic
988 operation (7.1.2)." */
990 #define IS_NUMERIC_TYPE(t) \
991 ((t) == BT_INTEGER || (t) == BT_REAL || (t) == BT_COMPLEX)
993 /* Unary ops are easy, do them first. */
994 if (op
== INTRINSIC_NOT
)
996 if (t1
== BT_LOGICAL
)
1002 if (args
== 1 && (op
== INTRINSIC_PLUS
|| op
== INTRINSIC_MINUS
))
1004 if (IS_NUMERIC_TYPE (t1
))
1010 /* Character intrinsic operators have same character kind, thus
1011 operator definitions with operands of different character kinds
1013 if (t1
== BT_CHARACTER
&& t2
== BT_CHARACTER
&& k1
!= k2
)
1016 /* Intrinsic operators always perform on arguments of same rank,
1017 so different ranks is also always safe. (rank == 0) is an exception
1018 to that, because all intrinsic operators are elemental. */
1019 if (r1
!= r2
&& r1
!= 0 && r2
!= 0)
1025 case INTRINSIC_EQ_OS
:
1027 case INTRINSIC_NE_OS
:
1028 if (t1
== BT_CHARACTER
&& t2
== BT_CHARACTER
)
1032 case INTRINSIC_PLUS
:
1033 case INTRINSIC_MINUS
:
1034 case INTRINSIC_TIMES
:
1035 case INTRINSIC_DIVIDE
:
1036 case INTRINSIC_POWER
:
1037 if (IS_NUMERIC_TYPE (t1
) && IS_NUMERIC_TYPE (t2
))
1042 case INTRINSIC_GT_OS
:
1044 case INTRINSIC_GE_OS
:
1046 case INTRINSIC_LT_OS
:
1048 case INTRINSIC_LE_OS
:
1049 if (t1
== BT_CHARACTER
&& t2
== BT_CHARACTER
)
1051 if ((t1
== BT_INTEGER
|| t1
== BT_REAL
)
1052 && (t2
== BT_INTEGER
|| t2
== BT_REAL
))
1056 case INTRINSIC_CONCAT
:
1057 if (t1
== BT_CHARACTER
&& t2
== BT_CHARACTER
)
1064 case INTRINSIC_NEQV
:
1065 if (t1
== BT_LOGICAL
&& t2
== BT_LOGICAL
)
1075 #undef IS_NUMERIC_TYPE
1078 gfc_error ("Operator interface at %L conflicts with intrinsic interface",
1084 /* Given a pair of formal argument lists, we see if the two lists can
1085 be distinguished by counting the number of nonoptional arguments of
1086 a given type/rank in f1 and seeing if there are less then that
1087 number of those arguments in f2 (including optional arguments).
1088 Since this test is asymmetric, it has to be called twice to make it
1089 symmetric. Returns nonzero if the argument lists are incompatible
1090 by this test. This subroutine implements rule 1 of section F03:16.2.3.
1091 'p1' and 'p2' are the PASS arguments of both procedures (if applicable). */
1094 count_types_test (gfc_formal_arglist
*f1
, gfc_formal_arglist
*f2
,
1095 const char *p1
, const char *p2
)
1097 int ac1
, ac2
, i
, j
, k
, n1
;
1098 gfc_formal_arglist
*f
;
1111 for (f
= f1
; f
; f
= f
->next
)
1114 /* Build an array of integers that gives the same integer to
1115 arguments of the same type/rank. */
1116 arg
= XCNEWVEC (arginfo
, n1
);
1119 for (i
= 0; i
< n1
; i
++, f
= f
->next
)
1122 arg
[i
].sym
= f
->sym
;
1127 for (i
= 0; i
< n1
; i
++)
1129 if (arg
[i
].flag
!= -1)
1132 if (arg
[i
].sym
&& (arg
[i
].sym
->attr
.optional
1133 || (p1
&& strcmp (arg
[i
].sym
->name
, p1
) == 0)))
1134 continue; /* Skip OPTIONAL and PASS arguments. */
1138 /* Find other non-optional, non-pass arguments of the same type/rank. */
1139 for (j
= i
+ 1; j
< n1
; j
++)
1140 if ((arg
[j
].sym
== NULL
1141 || !(arg
[j
].sym
->attr
.optional
1142 || (p1
&& strcmp (arg
[j
].sym
->name
, p1
) == 0)))
1143 && (compare_type_rank_if (arg
[i
].sym
, arg
[j
].sym
)
1144 || compare_type_rank_if (arg
[j
].sym
, arg
[i
].sym
)))
1150 /* Now loop over each distinct type found in f1. */
1154 for (i
= 0; i
< n1
; i
++)
1156 if (arg
[i
].flag
!= k
)
1160 for (j
= i
+ 1; j
< n1
; j
++)
1161 if (arg
[j
].flag
== k
)
1164 /* Count the number of non-pass arguments in f2 with that type,
1165 including those that are optional. */
1168 for (f
= f2
; f
; f
= f
->next
)
1169 if ((!p2
|| strcmp (f
->sym
->name
, p2
) != 0)
1170 && (compare_type_rank_if (arg
[i
].sym
, f
->sym
)
1171 || compare_type_rank_if (f
->sym
, arg
[i
].sym
)))
1189 /* Perform the correspondence test in rule (3) of F08:C1215.
1190 Returns zero if no argument is found that satisfies this rule,
1191 nonzero otherwise. 'p1' and 'p2' are the PASS arguments of both procedures
1194 This test is also not symmetric in f1 and f2 and must be called
1195 twice. This test finds problems caused by sorting the actual
1196 argument list with keywords. For example:
1200 INTEGER :: A ; REAL :: B
1204 INTEGER :: A ; REAL :: B
1208 At this point, 'CALL FOO(A=1, B=1.0)' is ambiguous. */
1211 generic_correspondence (gfc_formal_arglist
*f1
, gfc_formal_arglist
*f2
,
1212 const char *p1
, const char *p2
)
1214 gfc_formal_arglist
*f2_save
, *g
;
1221 if (f1
->sym
->attr
.optional
)
1224 if (p1
&& strcmp (f1
->sym
->name
, p1
) == 0)
1226 if (f2
&& p2
&& strcmp (f2
->sym
->name
, p2
) == 0)
1229 if (f2
!= NULL
&& (compare_type_rank (f1
->sym
, f2
->sym
)
1230 || compare_type_rank (f2
->sym
, f1
->sym
))
1231 && !((gfc_option
.allow_std
& GFC_STD_F2008
)
1232 && ((f1
->sym
->attr
.allocatable
&& f2
->sym
->attr
.pointer
)
1233 || (f2
->sym
->attr
.allocatable
&& f1
->sym
->attr
.pointer
))))
1236 /* Now search for a disambiguating keyword argument starting at
1237 the current non-match. */
1238 for (g
= f1
; g
; g
= g
->next
)
1240 if (g
->sym
->attr
.optional
|| (p1
&& strcmp (g
->sym
->name
, p1
) == 0))
1243 sym
= find_keyword_arg (g
->sym
->name
, f2_save
);
1244 if (sym
== NULL
|| !compare_type_rank (g
->sym
, sym
)
1245 || ((gfc_option
.allow_std
& GFC_STD_F2008
)
1246 && ((sym
->attr
.allocatable
&& g
->sym
->attr
.pointer
)
1247 || (sym
->attr
.pointer
&& g
->sym
->attr
.allocatable
))))
1263 symbol_rank (gfc_symbol
*sym
)
1266 as
= (sym
->ts
.type
== BT_CLASS
) ? CLASS_DATA (sym
)->as
: sym
->as
;
1267 return as
? as
->rank
: 0;
1271 /* Check if the characteristics of two dummy arguments match,
1275 gfc_check_dummy_characteristics (gfc_symbol
*s1
, gfc_symbol
*s2
,
1276 bool type_must_agree
, char *errmsg
,
1279 if (s1
== NULL
|| s2
== NULL
)
1280 return s1
== s2
? true : false;
1282 /* Check type and rank. */
1283 if (type_must_agree
)
1285 if (!compare_type (s1
, s2
) || !compare_type (s2
, s1
))
1287 snprintf (errmsg
, err_len
, "Type mismatch in argument '%s' (%s/%s)",
1288 s1
->name
, gfc_typename (&s1
->ts
), gfc_typename (&s2
->ts
));
1291 if (!compare_rank (s1
, s2
))
1293 snprintf (errmsg
, err_len
, "Rank mismatch in argument '%s' (%i/%i)",
1294 s1
->name
, symbol_rank (s1
), symbol_rank (s2
));
1300 if (s1
->attr
.intent
!= s2
->attr
.intent
)
1302 snprintf (errmsg
, err_len
, "INTENT mismatch in argument '%s'",
1307 /* Check OPTIONAL attribute. */
1308 if (s1
->attr
.optional
!= s2
->attr
.optional
)
1310 snprintf (errmsg
, err_len
, "OPTIONAL mismatch in argument '%s'",
1315 /* Check ALLOCATABLE attribute. */
1316 if (s1
->attr
.allocatable
!= s2
->attr
.allocatable
)
1318 snprintf (errmsg
, err_len
, "ALLOCATABLE mismatch in argument '%s'",
1323 /* Check POINTER attribute. */
1324 if (s1
->attr
.pointer
!= s2
->attr
.pointer
)
1326 snprintf (errmsg
, err_len
, "POINTER mismatch in argument '%s'",
1331 /* Check TARGET attribute. */
1332 if (s1
->attr
.target
!= s2
->attr
.target
)
1334 snprintf (errmsg
, err_len
, "TARGET mismatch in argument '%s'",
1339 /* Check ASYNCHRONOUS attribute. */
1340 if (s1
->attr
.asynchronous
!= s2
->attr
.asynchronous
)
1342 snprintf (errmsg
, err_len
, "ASYNCHRONOUS mismatch in argument '%s'",
1347 /* Check CONTIGUOUS attribute. */
1348 if (s1
->attr
.contiguous
!= s2
->attr
.contiguous
)
1350 snprintf (errmsg
, err_len
, "CONTIGUOUS mismatch in argument '%s'",
1355 /* Check VALUE attribute. */
1356 if (s1
->attr
.value
!= s2
->attr
.value
)
1358 snprintf (errmsg
, err_len
, "VALUE mismatch in argument '%s'",
1363 /* Check VOLATILE attribute. */
1364 if (s1
->attr
.volatile_
!= s2
->attr
.volatile_
)
1366 snprintf (errmsg
, err_len
, "VOLATILE mismatch in argument '%s'",
1371 /* Check interface of dummy procedures. */
1372 if (s1
->attr
.flavor
== FL_PROCEDURE
)
1375 if (!gfc_compare_interfaces (s1
, s2
, s2
->name
, 0, 1, err
, sizeof(err
),
1378 snprintf (errmsg
, err_len
, "Interface mismatch in dummy procedure "
1379 "'%s': %s", s1
->name
, err
);
1384 /* Check string length. */
1385 if (s1
->ts
.type
== BT_CHARACTER
1386 && s1
->ts
.u
.cl
&& s1
->ts
.u
.cl
->length
1387 && s2
->ts
.u
.cl
&& s2
->ts
.u
.cl
->length
)
1389 int compval
= gfc_dep_compare_expr (s1
->ts
.u
.cl
->length
,
1390 s2
->ts
.u
.cl
->length
);
1396 snprintf (errmsg
, err_len
, "Character length mismatch "
1397 "in argument '%s'", s1
->name
);
1401 /* FIXME: Implement a warning for this case.
1402 gfc_warning (0, "Possible character length mismatch in argument %qs",
1410 gfc_internal_error ("check_dummy_characteristics: Unexpected result "
1411 "%i of gfc_dep_compare_expr", compval
);
1416 /* Check array shape. */
1417 if (s1
->as
&& s2
->as
)
1420 gfc_expr
*shape1
, *shape2
;
1422 if (s1
->as
->type
!= s2
->as
->type
)
1424 snprintf (errmsg
, err_len
, "Shape mismatch in argument '%s'",
1429 if (s1
->as
->corank
!= s2
->as
->corank
)
1431 snprintf (errmsg
, err_len
, "Corank mismatch in argument '%s' (%i/%i)",
1432 s1
->name
, s1
->as
->corank
, s2
->as
->corank
);
1436 if (s1
->as
->type
== AS_EXPLICIT
)
1437 for (i
= 0; i
< s1
->as
->rank
+ MAX (0, s1
->as
->corank
-1); i
++)
1439 shape1
= gfc_subtract (gfc_copy_expr (s1
->as
->upper
[i
]),
1440 gfc_copy_expr (s1
->as
->lower
[i
]));
1441 shape2
= gfc_subtract (gfc_copy_expr (s2
->as
->upper
[i
]),
1442 gfc_copy_expr (s2
->as
->lower
[i
]));
1443 compval
= gfc_dep_compare_expr (shape1
, shape2
);
1444 gfc_free_expr (shape1
);
1445 gfc_free_expr (shape2
);
1451 if (i
< s1
->as
->rank
)
1452 snprintf (errmsg
, err_len
, "Shape mismatch in dimension %i of"
1453 " argument '%s'", i
+ 1, s1
->name
);
1455 snprintf (errmsg
, err_len
, "Shape mismatch in codimension %i "
1456 "of argument '%s'", i
- s1
->as
->rank
+ 1, s1
->name
);
1460 /* FIXME: Implement a warning for this case.
1461 gfc_warning (0, "Possible shape mismatch in argument %qs",
1469 gfc_internal_error ("check_dummy_characteristics: Unexpected "
1470 "result %i of gfc_dep_compare_expr",
1481 /* Check if the characteristics of two function results match,
1485 gfc_check_result_characteristics (gfc_symbol
*s1
, gfc_symbol
*s2
,
1486 char *errmsg
, int err_len
)
1488 gfc_symbol
*r1
, *r2
;
1490 if (s1
->ts
.interface
&& s1
->ts
.interface
->result
)
1491 r1
= s1
->ts
.interface
->result
;
1493 r1
= s1
->result
? s1
->result
: s1
;
1495 if (s2
->ts
.interface
&& s2
->ts
.interface
->result
)
1496 r2
= s2
->ts
.interface
->result
;
1498 r2
= s2
->result
? s2
->result
: s2
;
1500 if (r1
->ts
.type
== BT_UNKNOWN
)
1503 /* Check type and rank. */
1504 if (!compare_type (r1
, r2
))
1506 snprintf (errmsg
, err_len
, "Type mismatch in function result (%s/%s)",
1507 gfc_typename (&r1
->ts
), gfc_typename (&r2
->ts
));
1510 if (!compare_rank (r1
, r2
))
1512 snprintf (errmsg
, err_len
, "Rank mismatch in function result (%i/%i)",
1513 symbol_rank (r1
), symbol_rank (r2
));
1517 /* Check ALLOCATABLE attribute. */
1518 if (r1
->attr
.allocatable
!= r2
->attr
.allocatable
)
1520 snprintf (errmsg
, err_len
, "ALLOCATABLE attribute mismatch in "
1525 /* Check POINTER attribute. */
1526 if (r1
->attr
.pointer
!= r2
->attr
.pointer
)
1528 snprintf (errmsg
, err_len
, "POINTER attribute mismatch in "
1533 /* Check CONTIGUOUS attribute. */
1534 if (r1
->attr
.contiguous
!= r2
->attr
.contiguous
)
1536 snprintf (errmsg
, err_len
, "CONTIGUOUS attribute mismatch in "
1541 /* Check PROCEDURE POINTER attribute. */
1542 if (r1
!= s1
&& r1
->attr
.proc_pointer
!= r2
->attr
.proc_pointer
)
1544 snprintf (errmsg
, err_len
, "PROCEDURE POINTER mismatch in "
1549 /* Check string length. */
1550 if (r1
->ts
.type
== BT_CHARACTER
&& r1
->ts
.u
.cl
&& r2
->ts
.u
.cl
)
1552 if (r1
->ts
.deferred
!= r2
->ts
.deferred
)
1554 snprintf (errmsg
, err_len
, "Character length mismatch "
1555 "in function result");
1559 if (r1
->ts
.u
.cl
->length
&& r2
->ts
.u
.cl
->length
)
1561 int compval
= gfc_dep_compare_expr (r1
->ts
.u
.cl
->length
,
1562 r2
->ts
.u
.cl
->length
);
1568 snprintf (errmsg
, err_len
, "Character length mismatch "
1569 "in function result");
1573 /* FIXME: Implement a warning for this case.
1574 snprintf (errmsg, err_len, "Possible character length mismatch "
1575 "in function result");*/
1582 gfc_internal_error ("check_result_characteristics (1): Unexpected "
1583 "result %i of gfc_dep_compare_expr", compval
);
1589 /* Check array shape. */
1590 if (!r1
->attr
.allocatable
&& !r1
->attr
.pointer
&& r1
->as
&& r2
->as
)
1593 gfc_expr
*shape1
, *shape2
;
1595 if (r1
->as
->type
!= r2
->as
->type
)
1597 snprintf (errmsg
, err_len
, "Shape mismatch in function result");
1601 if (r1
->as
->type
== AS_EXPLICIT
)
1602 for (i
= 0; i
< r1
->as
->rank
+ r1
->as
->corank
; i
++)
1604 shape1
= gfc_subtract (gfc_copy_expr (r1
->as
->upper
[i
]),
1605 gfc_copy_expr (r1
->as
->lower
[i
]));
1606 shape2
= gfc_subtract (gfc_copy_expr (r2
->as
->upper
[i
]),
1607 gfc_copy_expr (r2
->as
->lower
[i
]));
1608 compval
= gfc_dep_compare_expr (shape1
, shape2
);
1609 gfc_free_expr (shape1
);
1610 gfc_free_expr (shape2
);
1616 snprintf (errmsg
, err_len
, "Shape mismatch in dimension %i of "
1617 "function result", i
+ 1);
1621 /* FIXME: Implement a warning for this case.
1622 gfc_warning (0, "Possible shape mismatch in return value");*/
1629 gfc_internal_error ("check_result_characteristics (2): "
1630 "Unexpected result %i of "
1631 "gfc_dep_compare_expr", compval
);
1641 /* 'Compare' two formal interfaces associated with a pair of symbols.
1642 We return true if there exists an actual argument list that
1643 would be ambiguous between the two interfaces, zero otherwise.
1644 'strict_flag' specifies whether all the characteristics are
1645 required to match, which is not the case for ambiguity checks.
1646 'p1' and 'p2' are the PASS arguments of both procedures (if applicable). */
1649 gfc_compare_interfaces (gfc_symbol
*s1
, gfc_symbol
*s2
, const char *name2
,
1650 int generic_flag
, int strict_flag
,
1651 char *errmsg
, int err_len
,
1652 const char *p1
, const char *p2
)
1654 gfc_formal_arglist
*f1
, *f2
;
1656 gcc_assert (name2
!= NULL
);
1658 if (s1
->attr
.function
&& (s2
->attr
.subroutine
1659 || (!s2
->attr
.function
&& s2
->ts
.type
== BT_UNKNOWN
1660 && gfc_get_default_type (name2
, s2
->ns
)->type
== BT_UNKNOWN
)))
1663 snprintf (errmsg
, err_len
, "'%s' is not a function", name2
);
1667 if (s1
->attr
.subroutine
&& s2
->attr
.function
)
1670 snprintf (errmsg
, err_len
, "'%s' is not a subroutine", name2
);
1674 /* Do strict checks on all characteristics
1675 (for dummy procedures and procedure pointer assignments). */
1676 if (!generic_flag
&& strict_flag
)
1678 if (s1
->attr
.function
&& s2
->attr
.function
)
1680 /* If both are functions, check result characteristics. */
1681 if (!gfc_check_result_characteristics (s1
, s2
, errmsg
, err_len
)
1682 || !gfc_check_result_characteristics (s2
, s1
, errmsg
, err_len
))
1686 if (s1
->attr
.pure
&& !s2
->attr
.pure
)
1688 snprintf (errmsg
, err_len
, "Mismatch in PURE attribute");
1691 if (s1
->attr
.elemental
&& !s2
->attr
.elemental
)
1693 snprintf (errmsg
, err_len
, "Mismatch in ELEMENTAL attribute");
1698 if (s1
->attr
.if_source
== IFSRC_UNKNOWN
1699 || s2
->attr
.if_source
== IFSRC_UNKNOWN
)
1702 f1
= gfc_sym_get_dummy_args (s1
);
1703 f2
= gfc_sym_get_dummy_args (s2
);
1705 /* Special case: No arguments. */
1706 if (f1
== NULL
&& f2
== NULL
)
1711 if (count_types_test (f1
, f2
, p1
, p2
)
1712 || count_types_test (f2
, f1
, p2
, p1
))
1715 /* Special case: alternate returns. If both f1->sym and f2->sym are
1716 NULL, then the leading formal arguments are alternate returns.
1717 The previous conditional should catch argument lists with
1718 different number of argument. */
1719 if (f1
&& f1
->sym
== NULL
&& f2
&& f2
->sym
== NULL
)
1722 if (generic_correspondence (f1
, f2
, p1
, p2
)
1723 || generic_correspondence (f2
, f1
, p2
, p1
))
1727 /* Perform the abbreviated correspondence test for operators (the
1728 arguments cannot be optional and are always ordered correctly).
1729 This is also done when comparing interfaces for dummy procedures and in
1730 procedure pointer assignments. */
1732 for (; f1
|| f2
; f1
= f1
->next
, f2
= f2
->next
)
1734 /* Check existence. */
1735 if (f1
== NULL
|| f2
== NULL
)
1738 snprintf (errmsg
, err_len
, "'%s' has the wrong number of "
1739 "arguments", name2
);
1745 /* Check all characteristics. */
1746 if (!gfc_check_dummy_characteristics (f1
->sym
, f2
->sym
, true,
1752 /* Only check type and rank. */
1753 if (!compare_type (f2
->sym
, f1
->sym
))
1756 snprintf (errmsg
, err_len
, "Type mismatch in argument '%s' "
1757 "(%s/%s)", f1
->sym
->name
,
1758 gfc_typename (&f1
->sym
->ts
),
1759 gfc_typename (&f2
->sym
->ts
));
1762 if (!compare_rank (f2
->sym
, f1
->sym
))
1765 snprintf (errmsg
, err_len
, "Rank mismatch in argument '%s' "
1766 "(%i/%i)", f1
->sym
->name
, symbol_rank (f1
->sym
),
1767 symbol_rank (f2
->sym
));
1777 /* Given a pointer to an interface pointer, remove duplicate
1778 interfaces and make sure that all symbols are either functions
1779 or subroutines, and all of the same kind. Returns true if
1780 something goes wrong. */
1783 check_interface0 (gfc_interface
*p
, const char *interface_name
)
1785 gfc_interface
*psave
, *q
, *qlast
;
1788 for (; p
; p
= p
->next
)
1790 /* Make sure all symbols in the interface have been defined as
1791 functions or subroutines. */
1792 if (((!p
->sym
->attr
.function
&& !p
->sym
->attr
.subroutine
)
1793 || !p
->sym
->attr
.if_source
)
1794 && !gfc_fl_struct (p
->sym
->attr
.flavor
))
1796 if (p
->sym
->attr
.external
)
1797 gfc_error ("Procedure %qs in %s at %L has no explicit interface",
1798 p
->sym
->name
, interface_name
, &p
->sym
->declared_at
);
1800 gfc_error ("Procedure %qs in %s at %L is neither function nor "
1801 "subroutine", p
->sym
->name
, interface_name
,
1802 &p
->sym
->declared_at
);
1806 /* Verify that procedures are either all SUBROUTINEs or all FUNCTIONs. */
1807 if ((psave
->sym
->attr
.function
&& !p
->sym
->attr
.function
1808 && !gfc_fl_struct (p
->sym
->attr
.flavor
))
1809 || (psave
->sym
->attr
.subroutine
&& !p
->sym
->attr
.subroutine
))
1811 if (!gfc_fl_struct (p
->sym
->attr
.flavor
))
1812 gfc_error ("In %s at %L procedures must be either all SUBROUTINEs"
1813 " or all FUNCTIONs", interface_name
,
1814 &p
->sym
->declared_at
);
1815 else if (p
->sym
->attr
.flavor
== FL_DERIVED
)
1816 gfc_error ("In %s at %L procedures must be all FUNCTIONs as the "
1817 "generic name is also the name of a derived type",
1818 interface_name
, &p
->sym
->declared_at
);
1822 /* F2003, C1207. F2008, C1207. */
1823 if (p
->sym
->attr
.proc
== PROC_INTERNAL
1824 && !gfc_notify_std (GFC_STD_F2008
, "Internal procedure "
1825 "%qs in %s at %L", p
->sym
->name
,
1826 interface_name
, &p
->sym
->declared_at
))
1831 /* Remove duplicate interfaces in this interface list. */
1832 for (; p
; p
= p
->next
)
1836 for (q
= p
->next
; q
;)
1838 if (p
->sym
!= q
->sym
)
1845 /* Duplicate interface. */
1846 qlast
->next
= q
->next
;
1857 /* Check lists of interfaces to make sure that no two interfaces are
1858 ambiguous. Duplicate interfaces (from the same symbol) are OK here. */
1861 check_interface1 (gfc_interface
*p
, gfc_interface
*q0
,
1862 int generic_flag
, const char *interface_name
,
1866 for (; p
; p
= p
->next
)
1867 for (q
= q0
; q
; q
= q
->next
)
1869 if (p
->sym
== q
->sym
)
1870 continue; /* Duplicates OK here. */
1872 if (p
->sym
->name
== q
->sym
->name
&& p
->sym
->module
== q
->sym
->module
)
1875 if (!gfc_fl_struct (p
->sym
->attr
.flavor
)
1876 && !gfc_fl_struct (q
->sym
->attr
.flavor
)
1877 && gfc_compare_interfaces (p
->sym
, q
->sym
, q
->sym
->name
,
1878 generic_flag
, 0, NULL
, 0, NULL
, NULL
))
1881 gfc_error ("Ambiguous interfaces in %s for %qs at %L "
1882 "and %qs at %L", interface_name
,
1883 q
->sym
->name
, &q
->sym
->declared_at
,
1884 p
->sym
->name
, &p
->sym
->declared_at
);
1885 else if (!p
->sym
->attr
.use_assoc
&& q
->sym
->attr
.use_assoc
)
1886 gfc_warning (0, "Ambiguous interfaces in %s for %qs at %L "
1887 "and %qs at %L", interface_name
,
1888 q
->sym
->name
, &q
->sym
->declared_at
,
1889 p
->sym
->name
, &p
->sym
->declared_at
);
1891 gfc_warning (0, "Although not referenced, %qs has ambiguous "
1892 "interfaces at %L", interface_name
, &p
->where
);
1900 /* Check the generic and operator interfaces of symbols to make sure
1901 that none of the interfaces conflict. The check has to be done
1902 after all of the symbols are actually loaded. */
1905 check_sym_interfaces (gfc_symbol
*sym
)
1907 char interface_name
[100];
1910 if (sym
->ns
!= gfc_current_ns
)
1913 if (sym
->generic
!= NULL
)
1915 sprintf (interface_name
, "generic interface '%s'", sym
->name
);
1916 if (check_interface0 (sym
->generic
, interface_name
))
1919 for (p
= sym
->generic
; p
; p
= p
->next
)
1921 if (p
->sym
->attr
.mod_proc
1922 && !p
->sym
->attr
.module_procedure
1923 && (p
->sym
->attr
.if_source
!= IFSRC_DECL
1924 || p
->sym
->attr
.procedure
))
1926 gfc_error ("%qs at %L is not a module procedure",
1927 p
->sym
->name
, &p
->where
);
1932 /* Originally, this test was applied to host interfaces too;
1933 this is incorrect since host associated symbols, from any
1934 source, cannot be ambiguous with local symbols. */
1935 check_interface1 (sym
->generic
, sym
->generic
, 1, interface_name
,
1936 sym
->attr
.referenced
|| !sym
->attr
.use_assoc
);
1942 check_uop_interfaces (gfc_user_op
*uop
)
1944 char interface_name
[100];
1948 sprintf (interface_name
, "operator interface '%s'", uop
->name
);
1949 if (check_interface0 (uop
->op
, interface_name
))
1952 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
1954 uop2
= gfc_find_uop (uop
->name
, ns
);
1958 check_interface1 (uop
->op
, uop2
->op
, 0,
1959 interface_name
, true);
1963 /* Given an intrinsic op, return an equivalent op if one exists,
1964 or INTRINSIC_NONE otherwise. */
1967 gfc_equivalent_op (gfc_intrinsic_op op
)
1972 return INTRINSIC_EQ_OS
;
1974 case INTRINSIC_EQ_OS
:
1975 return INTRINSIC_EQ
;
1978 return INTRINSIC_NE_OS
;
1980 case INTRINSIC_NE_OS
:
1981 return INTRINSIC_NE
;
1984 return INTRINSIC_GT_OS
;
1986 case INTRINSIC_GT_OS
:
1987 return INTRINSIC_GT
;
1990 return INTRINSIC_GE_OS
;
1992 case INTRINSIC_GE_OS
:
1993 return INTRINSIC_GE
;
1996 return INTRINSIC_LT_OS
;
1998 case INTRINSIC_LT_OS
:
1999 return INTRINSIC_LT
;
2002 return INTRINSIC_LE_OS
;
2004 case INTRINSIC_LE_OS
:
2005 return INTRINSIC_LE
;
2008 return INTRINSIC_NONE
;
2012 /* For the namespace, check generic, user operator and intrinsic
2013 operator interfaces for consistency and to remove duplicate
2014 interfaces. We traverse the whole namespace, counting on the fact
2015 that most symbols will not have generic or operator interfaces. */
2018 gfc_check_interfaces (gfc_namespace
*ns
)
2020 gfc_namespace
*old_ns
, *ns2
;
2021 char interface_name
[100];
2024 old_ns
= gfc_current_ns
;
2025 gfc_current_ns
= ns
;
2027 gfc_traverse_ns (ns
, check_sym_interfaces
);
2029 gfc_traverse_user_op (ns
, check_uop_interfaces
);
2031 for (i
= GFC_INTRINSIC_BEGIN
; i
!= GFC_INTRINSIC_END
; i
++)
2033 if (i
== INTRINSIC_USER
)
2036 if (i
== INTRINSIC_ASSIGN
)
2037 strcpy (interface_name
, "intrinsic assignment operator");
2039 sprintf (interface_name
, "intrinsic '%s' operator",
2040 gfc_op2string ((gfc_intrinsic_op
) i
));
2042 if (check_interface0 (ns
->op
[i
], interface_name
))
2046 gfc_check_operator_interface (ns
->op
[i
]->sym
, (gfc_intrinsic_op
) i
,
2049 for (ns2
= ns
; ns2
; ns2
= ns2
->parent
)
2051 gfc_intrinsic_op other_op
;
2053 if (check_interface1 (ns
->op
[i
], ns2
->op
[i
], 0,
2054 interface_name
, true))
2057 /* i should be gfc_intrinsic_op, but has to be int with this cast
2058 here for stupid C++ compatibility rules. */
2059 other_op
= gfc_equivalent_op ((gfc_intrinsic_op
) i
);
2060 if (other_op
!= INTRINSIC_NONE
2061 && check_interface1 (ns
->op
[i
], ns2
->op
[other_op
],
2062 0, interface_name
, true))
2068 gfc_current_ns
= old_ns
;
2072 /* Given a symbol of a formal argument list and an expression, if the
2073 formal argument is allocatable, check that the actual argument is
2074 allocatable. Returns true if compatible, zero if not compatible. */
2077 compare_allocatable (gfc_symbol
*formal
, gfc_expr
*actual
)
2079 if (formal
->attr
.allocatable
2080 || (formal
->ts
.type
== BT_CLASS
&& CLASS_DATA (formal
)->attr
.allocatable
))
2082 symbol_attribute attr
= gfc_expr_attr (actual
);
2083 if (actual
->ts
.type
== BT_CLASS
&& !attr
.class_ok
)
2085 else if (!attr
.allocatable
)
2093 /* Given a symbol of a formal argument list and an expression, if the
2094 formal argument is a pointer, see if the actual argument is a
2095 pointer. Returns nonzero if compatible, zero if not compatible. */
2098 compare_pointer (gfc_symbol
*formal
, gfc_expr
*actual
)
2100 symbol_attribute attr
;
2102 if (formal
->attr
.pointer
2103 || (formal
->ts
.type
== BT_CLASS
&& CLASS_DATA (formal
)
2104 && CLASS_DATA (formal
)->attr
.class_pointer
))
2106 attr
= gfc_expr_attr (actual
);
2108 /* Fortran 2008 allows non-pointer actual arguments. */
2109 if (!attr
.pointer
&& attr
.target
&& formal
->attr
.intent
== INTENT_IN
)
2120 /* Emit clear error messages for rank mismatch. */
2123 argument_rank_mismatch (const char *name
, locus
*where
,
2124 int rank1
, int rank2
)
2127 /* TS 29113, C407b. */
2129 gfc_error ("The assumed-rank array at %L requires that the dummy argument"
2130 " %qs has assumed-rank", where
, name
);
2131 else if (rank1
== 0)
2132 gfc_error_opt (OPT_Wargument_mismatch
, "Rank mismatch in argument %qs "
2133 "at %L (scalar and rank-%d)", name
, where
, rank2
);
2134 else if (rank2
== 0)
2135 gfc_error_opt (OPT_Wargument_mismatch
, "Rank mismatch in argument %qs "
2136 "at %L (rank-%d and scalar)", name
, where
, rank1
);
2138 gfc_error_opt (OPT_Wargument_mismatch
, "Rank mismatch in argument %qs "
2139 "at %L (rank-%d and rank-%d)", name
, where
, rank1
, rank2
);
2143 /* Given a symbol of a formal argument list and an expression, see if
2144 the two are compatible as arguments. Returns true if
2145 compatible, false if not compatible. */
2148 compare_parameter (gfc_symbol
*formal
, gfc_expr
*actual
,
2149 int ranks_must_agree
, int is_elemental
, locus
*where
)
2152 bool rank_check
, is_pointer
;
2156 /* If the formal arg has type BT_VOID, it's to one of the iso_c_binding
2157 procs c_f_pointer or c_f_procpointer, and we need to accept most
2158 pointers the user could give us. This should allow that. */
2159 if (formal
->ts
.type
== BT_VOID
)
2162 if (formal
->ts
.type
== BT_DERIVED
2163 && formal
->ts
.u
.derived
&& formal
->ts
.u
.derived
->ts
.is_iso_c
2164 && actual
->ts
.type
== BT_DERIVED
2165 && actual
->ts
.u
.derived
&& actual
->ts
.u
.derived
->ts
.is_iso_c
)
2168 if (formal
->ts
.type
== BT_CLASS
&& actual
->ts
.type
== BT_DERIVED
)
2169 /* Make sure the vtab symbol is present when
2170 the module variables are generated. */
2171 gfc_find_derived_vtab (actual
->ts
.u
.derived
);
2173 if (actual
->ts
.type
== BT_PROCEDURE
)
2175 gfc_symbol
*act_sym
= actual
->symtree
->n
.sym
;
2177 if (formal
->attr
.flavor
!= FL_PROCEDURE
)
2180 gfc_error ("Invalid procedure argument at %L", &actual
->where
);
2184 if (!gfc_compare_interfaces (formal
, act_sym
, act_sym
->name
, 0, 1, err
,
2185 sizeof(err
), NULL
, NULL
))
2188 gfc_error_opt (OPT_Wargument_mismatch
,
2189 "Interface mismatch in dummy procedure %qs at %L:"
2190 " %s", formal
->name
, &actual
->where
, err
);
2194 if (formal
->attr
.function
&& !act_sym
->attr
.function
)
2196 gfc_add_function (&act_sym
->attr
, act_sym
->name
,
2197 &act_sym
->declared_at
);
2198 if (act_sym
->ts
.type
== BT_UNKNOWN
2199 && !gfc_set_default_type (act_sym
, 1, act_sym
->ns
))
2202 else if (formal
->attr
.subroutine
&& !act_sym
->attr
.subroutine
)
2203 gfc_add_subroutine (&act_sym
->attr
, act_sym
->name
,
2204 &act_sym
->declared_at
);
2209 ppc
= gfc_get_proc_ptr_comp (actual
);
2210 if (ppc
&& ppc
->ts
.interface
)
2212 if (!gfc_compare_interfaces (formal
, ppc
->ts
.interface
, ppc
->name
, 0, 1,
2213 err
, sizeof(err
), NULL
, NULL
))
2216 gfc_error_opt (OPT_Wargument_mismatch
,
2217 "Interface mismatch in dummy procedure %qs at %L:"
2218 " %s", formal
->name
, &actual
->where
, err
);
2224 if (formal
->attr
.pointer
&& formal
->attr
.contiguous
2225 && !gfc_is_simply_contiguous (actual
, true, false))
2228 gfc_error ("Actual argument to contiguous pointer dummy %qs at %L "
2229 "must be simply contiguous", formal
->name
, &actual
->where
);
2233 symbol_attribute actual_attr
= gfc_expr_attr (actual
);
2234 if (actual
->ts
.type
== BT_CLASS
&& !actual_attr
.class_ok
)
2237 if ((actual
->expr_type
!= EXPR_NULL
|| actual
->ts
.type
!= BT_UNKNOWN
)
2238 && actual
->ts
.type
!= BT_HOLLERITH
2239 && formal
->ts
.type
!= BT_ASSUMED
2240 && !(formal
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
2241 && !gfc_compare_types (&formal
->ts
, &actual
->ts
)
2242 && !(formal
->ts
.type
== BT_DERIVED
&& actual
->ts
.type
== BT_CLASS
2243 && gfc_compare_derived_types (formal
->ts
.u
.derived
,
2244 CLASS_DATA (actual
)->ts
.u
.derived
)))
2247 gfc_error_opt (OPT_Wargument_mismatch
,
2248 "Type mismatch in argument %qs at %L; passed %s to %s",
2249 formal
->name
, where
, gfc_typename (&actual
->ts
),
2250 gfc_typename (&formal
->ts
));
2254 if (actual
->ts
.type
== BT_ASSUMED
&& formal
->ts
.type
!= BT_ASSUMED
)
2257 gfc_error ("Assumed-type actual argument at %L requires that dummy "
2258 "argument %qs is of assumed type", &actual
->where
,
2263 /* F2008, 12.5.2.5; IR F08/0073. */
2264 if (formal
->ts
.type
== BT_CLASS
&& formal
->attr
.class_ok
2265 && actual
->expr_type
!= EXPR_NULL
2266 && ((CLASS_DATA (formal
)->attr
.class_pointer
2267 && formal
->attr
.intent
!= INTENT_IN
)
2268 || CLASS_DATA (formal
)->attr
.allocatable
))
2270 if (actual
->ts
.type
!= BT_CLASS
)
2273 gfc_error ("Actual argument to %qs at %L must be polymorphic",
2274 formal
->name
, &actual
->where
);
2278 if ((!UNLIMITED_POLY (formal
) || !UNLIMITED_POLY(actual
))
2279 && !gfc_compare_derived_types (CLASS_DATA (actual
)->ts
.u
.derived
,
2280 CLASS_DATA (formal
)->ts
.u
.derived
))
2283 gfc_error ("Actual argument to %qs at %L must have the same "
2284 "declared type", formal
->name
, &actual
->where
);
2289 /* F08: 12.5.2.5 Allocatable and pointer dummy variables. However, this
2290 is necessary also for F03, so retain error for both.
2291 NOTE: Other type/kind errors pre-empt this error. Since they are F03
2292 compatible, no attempt has been made to channel to this one. */
2293 if (UNLIMITED_POLY (formal
) && !UNLIMITED_POLY (actual
)
2294 && (CLASS_DATA (formal
)->attr
.allocatable
2295 ||CLASS_DATA (formal
)->attr
.class_pointer
))
2298 gfc_error ("Actual argument to %qs at %L must be unlimited "
2299 "polymorphic since the formal argument is a "
2300 "pointer or allocatable unlimited polymorphic "
2301 "entity [F2008: 12.5.2.5]", formal
->name
,
2306 if (formal
->attr
.codimension
&& !gfc_is_coarray (actual
))
2309 gfc_error ("Actual argument to %qs at %L must be a coarray",
2310 formal
->name
, &actual
->where
);
2314 if (formal
->attr
.codimension
&& formal
->attr
.allocatable
)
2316 gfc_ref
*last
= NULL
;
2318 for (ref
= actual
->ref
; ref
; ref
= ref
->next
)
2319 if (ref
->type
== REF_COMPONENT
)
2322 /* F2008, 12.5.2.6. */
2323 if ((last
&& last
->u
.c
.component
->as
->corank
!= formal
->as
->corank
)
2325 && actual
->symtree
->n
.sym
->as
->corank
!= formal
->as
->corank
))
2328 gfc_error ("Corank mismatch in argument %qs at %L (%d and %d)",
2329 formal
->name
, &actual
->where
, formal
->as
->corank
,
2330 last
? last
->u
.c
.component
->as
->corank
2331 : actual
->symtree
->n
.sym
->as
->corank
);
2336 if (formal
->attr
.codimension
)
2338 /* F2008, 12.5.2.8 + Corrig 2 (IR F08/0048). */
2339 /* F2015, 12.5.2.8. */
2340 if (formal
->attr
.dimension
2341 && (formal
->attr
.contiguous
|| formal
->as
->type
!= AS_ASSUMED_SHAPE
)
2342 && actual_attr
.dimension
2343 && !gfc_is_simply_contiguous (actual
, true, true))
2346 gfc_error ("Actual argument to %qs at %L must be simply "
2347 "contiguous or an element of such an array",
2348 formal
->name
, &actual
->where
);
2352 /* F2008, C1303 and C1304. */
2353 if (formal
->attr
.intent
!= INTENT_INOUT
2354 && (((formal
->ts
.type
== BT_DERIVED
|| formal
->ts
.type
== BT_CLASS
)
2355 && formal
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
2356 && formal
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
2357 || formal
->attr
.lock_comp
))
2361 gfc_error ("Actual argument to non-INTENT(INOUT) dummy %qs at %L, "
2362 "which is LOCK_TYPE or has a LOCK_TYPE component",
2363 formal
->name
, &actual
->where
);
2367 /* TS18508, C702/C703. */
2368 if (formal
->attr
.intent
!= INTENT_INOUT
2369 && (((formal
->ts
.type
== BT_DERIVED
|| formal
->ts
.type
== BT_CLASS
)
2370 && formal
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
2371 && formal
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
2372 || formal
->attr
.event_comp
))
2376 gfc_error ("Actual argument to non-INTENT(INOUT) dummy %qs at %L, "
2377 "which is EVENT_TYPE or has a EVENT_TYPE component",
2378 formal
->name
, &actual
->where
);
2383 /* F2008, C1239/C1240. */
2384 if (actual
->expr_type
== EXPR_VARIABLE
2385 && (actual
->symtree
->n
.sym
->attr
.asynchronous
2386 || actual
->symtree
->n
.sym
->attr
.volatile_
)
2387 && (formal
->attr
.asynchronous
|| formal
->attr
.volatile_
)
2388 && actual
->rank
&& formal
->as
2389 && !gfc_is_simply_contiguous (actual
, true, false)
2390 && ((formal
->as
->type
!= AS_ASSUMED_SHAPE
2391 && formal
->as
->type
!= AS_ASSUMED_RANK
&& !formal
->attr
.pointer
)
2392 || formal
->attr
.contiguous
))
2395 gfc_error ("Dummy argument %qs has to be a pointer, assumed-shape or "
2396 "assumed-rank array without CONTIGUOUS attribute - as actual"
2397 " argument at %L is not simply contiguous and both are "
2398 "ASYNCHRONOUS or VOLATILE", formal
->name
, &actual
->where
);
2402 if (formal
->attr
.allocatable
&& !formal
->attr
.codimension
2403 && actual_attr
.codimension
)
2405 if (formal
->attr
.intent
== INTENT_OUT
)
2408 gfc_error ("Passing coarray at %L to allocatable, noncoarray, "
2409 "INTENT(OUT) dummy argument %qs", &actual
->where
,
2413 else if (warn_surprising
&& where
&& formal
->attr
.intent
!= INTENT_IN
)
2414 gfc_warning (OPT_Wsurprising
,
2415 "Passing coarray at %L to allocatable, noncoarray dummy "
2416 "argument %qs, which is invalid if the allocation status"
2417 " is modified", &actual
->where
, formal
->name
);
2420 /* If the rank is the same or the formal argument has assumed-rank. */
2421 if (symbol_rank (formal
) == actual
->rank
|| symbol_rank (formal
) == -1)
2424 rank_check
= where
!= NULL
&& !is_elemental
&& formal
->as
2425 && (formal
->as
->type
== AS_ASSUMED_SHAPE
2426 || formal
->as
->type
== AS_DEFERRED
)
2427 && actual
->expr_type
!= EXPR_NULL
;
2429 /* Skip rank checks for NO_ARG_CHECK. */
2430 if (formal
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
2433 /* Scalar & coindexed, see: F2008, Section 12.5.2.4. */
2434 if (rank_check
|| ranks_must_agree
2435 || (formal
->attr
.pointer
&& actual
->expr_type
!= EXPR_NULL
)
2436 || (actual
->rank
!= 0 && !(is_elemental
|| formal
->attr
.dimension
))
2437 || (actual
->rank
== 0
2438 && ((formal
->ts
.type
== BT_CLASS
2439 && CLASS_DATA (formal
)->as
->type
== AS_ASSUMED_SHAPE
)
2440 || (formal
->ts
.type
!= BT_CLASS
2441 && formal
->as
->type
== AS_ASSUMED_SHAPE
))
2442 && actual
->expr_type
!= EXPR_NULL
)
2443 || (actual
->rank
== 0 && formal
->attr
.dimension
2444 && gfc_is_coindexed (actual
)))
2447 argument_rank_mismatch (formal
->name
, &actual
->where
,
2448 symbol_rank (formal
), actual
->rank
);
2451 else if (actual
->rank
!= 0 && (is_elemental
|| formal
->attr
.dimension
))
2454 /* At this point, we are considering a scalar passed to an array. This
2455 is valid (cf. F95 12.4.1.1, F2003 12.4.1.2, and F2008 12.5.2.4),
2456 - if the actual argument is (a substring of) an element of a
2457 non-assumed-shape/non-pointer/non-polymorphic array; or
2458 - (F2003) if the actual argument is of type character of default/c_char
2461 is_pointer
= actual
->expr_type
== EXPR_VARIABLE
2462 ? actual
->symtree
->n
.sym
->attr
.pointer
: false;
2464 for (ref
= actual
->ref
; ref
; ref
= ref
->next
)
2466 if (ref
->type
== REF_COMPONENT
)
2467 is_pointer
= ref
->u
.c
.component
->attr
.pointer
;
2468 else if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.type
== AR_ELEMENT
2469 && ref
->u
.ar
.dimen
> 0
2471 || (ref
->next
->type
== REF_SUBSTRING
&& !ref
->next
->next
)))
2475 if (actual
->ts
.type
== BT_CLASS
&& actual
->expr_type
!= EXPR_NULL
)
2478 gfc_error ("Polymorphic scalar passed to array dummy argument %qs "
2479 "at %L", formal
->name
, &actual
->where
);
2483 if (actual
->expr_type
!= EXPR_NULL
&& ref
&& actual
->ts
.type
!= BT_CHARACTER
2484 && (is_pointer
|| ref
->u
.ar
.as
->type
== AS_ASSUMED_SHAPE
))
2487 gfc_error ("Element of assumed-shaped or pointer "
2488 "array passed to array dummy argument %qs at %L",
2489 formal
->name
, &actual
->where
);
2493 if (actual
->ts
.type
== BT_CHARACTER
&& actual
->expr_type
!= EXPR_NULL
2494 && (!ref
|| is_pointer
|| ref
->u
.ar
.as
->type
== AS_ASSUMED_SHAPE
))
2496 if (formal
->ts
.kind
!= 1 && (gfc_option
.allow_std
& GFC_STD_GNU
) == 0)
2499 gfc_error ("Extension: Scalar non-default-kind, non-C_CHAR-kind "
2500 "CHARACTER actual argument with array dummy argument "
2501 "%qs at %L", formal
->name
, &actual
->where
);
2505 if (where
&& (gfc_option
.allow_std
& GFC_STD_F2003
) == 0)
2507 gfc_error ("Fortran 2003: Scalar CHARACTER actual argument with "
2508 "array dummy argument %qs at %L",
2509 formal
->name
, &actual
->where
);
2513 return ((gfc_option
.allow_std
& GFC_STD_F2003
) != 0);
2516 if (ref
== NULL
&& actual
->expr_type
!= EXPR_NULL
)
2519 argument_rank_mismatch (formal
->name
, &actual
->where
,
2520 symbol_rank (formal
), actual
->rank
);
2528 /* Returns the storage size of a symbol (formal argument) or
2529 zero if it cannot be determined. */
2531 static unsigned long
2532 get_sym_storage_size (gfc_symbol
*sym
)
2535 unsigned long strlen
, elements
;
2537 if (sym
->ts
.type
== BT_CHARACTER
)
2539 if (sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
2540 && sym
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
2541 strlen
= mpz_get_ui (sym
->ts
.u
.cl
->length
->value
.integer
);
2548 if (symbol_rank (sym
) == 0)
2552 if (sym
->as
->type
!= AS_EXPLICIT
)
2554 for (i
= 0; i
< sym
->as
->rank
; i
++)
2556 if (sym
->as
->upper
[i
]->expr_type
!= EXPR_CONSTANT
2557 || sym
->as
->lower
[i
]->expr_type
!= EXPR_CONSTANT
)
2560 elements
*= mpz_get_si (sym
->as
->upper
[i
]->value
.integer
)
2561 - mpz_get_si (sym
->as
->lower
[i
]->value
.integer
) + 1L;
2564 return strlen
*elements
;
2568 /* Returns the storage size of an expression (actual argument) or
2569 zero if it cannot be determined. For an array element, it returns
2570 the remaining size as the element sequence consists of all storage
2571 units of the actual argument up to the end of the array. */
2573 static unsigned long
2574 get_expr_storage_size (gfc_expr
*e
)
2577 long int strlen
, elements
;
2578 long int substrlen
= 0;
2579 bool is_str_storage
= false;
2585 if (e
->ts
.type
== BT_CHARACTER
)
2587 if (e
->ts
.u
.cl
&& e
->ts
.u
.cl
->length
2588 && e
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
2589 strlen
= mpz_get_si (e
->ts
.u
.cl
->length
->value
.integer
);
2590 else if (e
->expr_type
== EXPR_CONSTANT
2591 && (e
->ts
.u
.cl
== NULL
|| e
->ts
.u
.cl
->length
== NULL
))
2592 strlen
= e
->value
.character
.length
;
2597 strlen
= 1; /* Length per element. */
2599 if (e
->rank
== 0 && !e
->ref
)
2607 for (i
= 0; i
< e
->rank
; i
++)
2608 elements
*= mpz_get_si (e
->shape
[i
]);
2609 return elements
*strlen
;
2612 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
2614 if (ref
->type
== REF_SUBSTRING
&& ref
->u
.ss
.start
2615 && ref
->u
.ss
.start
->expr_type
== EXPR_CONSTANT
)
2619 /* The string length is the substring length.
2620 Set now to full string length. */
2621 if (!ref
->u
.ss
.length
|| !ref
->u
.ss
.length
->length
2622 || ref
->u
.ss
.length
->length
->expr_type
!= EXPR_CONSTANT
)
2625 strlen
= mpz_get_ui (ref
->u
.ss
.length
->length
->value
.integer
);
2627 substrlen
= strlen
- mpz_get_ui (ref
->u
.ss
.start
->value
.integer
) + 1;
2631 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.type
== AR_SECTION
)
2632 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
2634 long int start
, end
, stride
;
2637 if (ref
->u
.ar
.stride
[i
])
2639 if (ref
->u
.ar
.stride
[i
]->expr_type
== EXPR_CONSTANT
)
2640 stride
= mpz_get_si (ref
->u
.ar
.stride
[i
]->value
.integer
);
2645 if (ref
->u
.ar
.start
[i
])
2647 if (ref
->u
.ar
.start
[i
]->expr_type
== EXPR_CONSTANT
)
2648 start
= mpz_get_si (ref
->u
.ar
.start
[i
]->value
.integer
);
2652 else if (ref
->u
.ar
.as
->lower
[i
]
2653 && ref
->u
.ar
.as
->lower
[i
]->expr_type
== EXPR_CONSTANT
)
2654 start
= mpz_get_si (ref
->u
.ar
.as
->lower
[i
]->value
.integer
);
2658 if (ref
->u
.ar
.end
[i
])
2660 if (ref
->u
.ar
.end
[i
]->expr_type
== EXPR_CONSTANT
)
2661 end
= mpz_get_si (ref
->u
.ar
.end
[i
]->value
.integer
);
2665 else if (ref
->u
.ar
.as
->upper
[i
]
2666 && ref
->u
.ar
.as
->upper
[i
]->expr_type
== EXPR_CONSTANT
)
2667 end
= mpz_get_si (ref
->u
.ar
.as
->upper
[i
]->value
.integer
);
2671 elements
*= (end
- start
)/stride
+ 1L;
2673 else if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.type
== AR_FULL
)
2674 for (i
= 0; i
< ref
->u
.ar
.as
->rank
; i
++)
2676 if (ref
->u
.ar
.as
->lower
[i
] && ref
->u
.ar
.as
->upper
[i
]
2677 && ref
->u
.ar
.as
->lower
[i
]->expr_type
== EXPR_CONSTANT
2678 && ref
->u
.ar
.as
->lower
[i
]->ts
.type
== BT_INTEGER
2679 && ref
->u
.ar
.as
->upper
[i
]->expr_type
== EXPR_CONSTANT
2680 && ref
->u
.ar
.as
->upper
[i
]->ts
.type
== BT_INTEGER
)
2681 elements
*= mpz_get_si (ref
->u
.ar
.as
->upper
[i
]->value
.integer
)
2682 - mpz_get_si (ref
->u
.ar
.as
->lower
[i
]->value
.integer
)
2687 else if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.type
== AR_ELEMENT
2688 && e
->expr_type
== EXPR_VARIABLE
)
2690 if (ref
->u
.ar
.as
->type
== AS_ASSUMED_SHAPE
2691 || e
->symtree
->n
.sym
->attr
.pointer
)
2697 /* Determine the number of remaining elements in the element
2698 sequence for array element designators. */
2699 is_str_storage
= true;
2700 for (i
= ref
->u
.ar
.dimen
- 1; i
>= 0; i
--)
2702 if (ref
->u
.ar
.start
[i
] == NULL
2703 || ref
->u
.ar
.start
[i
]->expr_type
!= EXPR_CONSTANT
2704 || ref
->u
.ar
.as
->upper
[i
] == NULL
2705 || ref
->u
.ar
.as
->lower
[i
] == NULL
2706 || ref
->u
.ar
.as
->upper
[i
]->expr_type
!= EXPR_CONSTANT
2707 || ref
->u
.ar
.as
->lower
[i
]->expr_type
!= EXPR_CONSTANT
)
2712 * (mpz_get_si (ref
->u
.ar
.as
->upper
[i
]->value
.integer
)
2713 - mpz_get_si (ref
->u
.ar
.as
->lower
[i
]->value
.integer
)
2715 - (mpz_get_si (ref
->u
.ar
.start
[i
]->value
.integer
)
2716 - mpz_get_si (ref
->u
.ar
.as
->lower
[i
]->value
.integer
));
2719 else if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.function
2720 && ref
->u
.c
.component
->attr
.proc_pointer
2721 && ref
->u
.c
.component
->attr
.dimension
)
2723 /* Array-valued procedure-pointer components. */
2724 gfc_array_spec
*as
= ref
->u
.c
.component
->as
;
2725 for (i
= 0; i
< as
->rank
; i
++)
2727 if (!as
->upper
[i
] || !as
->lower
[i
]
2728 || as
->upper
[i
]->expr_type
!= EXPR_CONSTANT
2729 || as
->lower
[i
]->expr_type
!= EXPR_CONSTANT
)
2733 * (mpz_get_si (as
->upper
[i
]->value
.integer
)
2734 - mpz_get_si (as
->lower
[i
]->value
.integer
) + 1L);
2740 return (is_str_storage
) ? substrlen
+ (elements
-1)*strlen
2743 return elements
*strlen
;
2747 /* Given an expression, check whether it is an array section
2748 which has a vector subscript. */
2751 gfc_has_vector_subscript (gfc_expr
*e
)
2756 if (e
== NULL
|| e
->rank
== 0 || e
->expr_type
!= EXPR_VARIABLE
)
2759 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
2760 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.type
== AR_SECTION
)
2761 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
2762 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
)
2770 is_procptr_result (gfc_expr
*expr
)
2772 gfc_component
*c
= gfc_get_proc_ptr_comp (expr
);
2774 return (c
->ts
.interface
&& (c
->ts
.interface
->attr
.proc_pointer
== 1));
2776 return ((expr
->symtree
->n
.sym
->result
!= expr
->symtree
->n
.sym
)
2777 && (expr
->symtree
->n
.sym
->result
->attr
.proc_pointer
== 1));
2781 /* Given formal and actual argument lists, see if they are compatible.
2782 If they are compatible, the actual argument list is sorted to
2783 correspond with the formal list, and elements for missing optional
2784 arguments are inserted. If WHERE pointer is nonnull, then we issue
2785 errors when things don't match instead of just returning the status
2789 compare_actual_formal (gfc_actual_arglist
**ap
, gfc_formal_arglist
*formal
,
2790 int ranks_must_agree
, int is_elemental
, locus
*where
)
2792 gfc_actual_arglist
**new_arg
, *a
, *actual
;
2793 gfc_formal_arglist
*f
;
2795 unsigned long actual_size
, formal_size
;
2796 bool full_array
= false;
2797 gfc_array_ref
*actual_arr_ref
;
2801 if (actual
== NULL
&& formal
== NULL
)
2805 for (f
= formal
; f
; f
= f
->next
)
2808 new_arg
= XALLOCAVEC (gfc_actual_arglist
*, n
);
2810 for (i
= 0; i
< n
; i
++)
2817 for (a
= actual
; a
; a
= a
->next
, f
= f
->next
)
2819 /* Look for keywords but ignore g77 extensions like %VAL. */
2820 if (a
->name
!= NULL
&& a
->name
[0] != '%')
2823 for (f
= formal
; f
; f
= f
->next
, i
++)
2827 if (strcmp (f
->sym
->name
, a
->name
) == 0)
2834 gfc_error ("Keyword argument %qs at %L is not in "
2835 "the procedure", a
->name
, &a
->expr
->where
);
2839 if (new_arg
[i
] != NULL
)
2842 gfc_error ("Keyword argument %qs at %L is already associated "
2843 "with another actual argument", a
->name
,
2852 gfc_error ("More actual than formal arguments in procedure "
2853 "call at %L", where
);
2858 if (f
->sym
== NULL
&& a
->expr
== NULL
)
2864 gfc_error ("Missing alternate return spec in subroutine call "
2869 if (a
->expr
== NULL
)
2872 gfc_error ("Unexpected alternate return spec in subroutine "
2873 "call at %L", where
);
2877 /* Make sure that intrinsic vtables exist for calls to unlimited
2878 polymorphic formal arguments. */
2879 if (UNLIMITED_POLY (f
->sym
)
2880 && a
->expr
->ts
.type
!= BT_DERIVED
2881 && a
->expr
->ts
.type
!= BT_CLASS
)
2882 gfc_find_vtab (&a
->expr
->ts
);
2884 if (a
->expr
->expr_type
== EXPR_NULL
2885 && ((f
->sym
->ts
.type
!= BT_CLASS
&& !f
->sym
->attr
.pointer
2886 && (f
->sym
->attr
.allocatable
|| !f
->sym
->attr
.optional
2887 || (gfc_option
.allow_std
& GFC_STD_F2008
) == 0))
2888 || (f
->sym
->ts
.type
== BT_CLASS
2889 && !CLASS_DATA (f
->sym
)->attr
.class_pointer
2890 && (CLASS_DATA (f
->sym
)->attr
.allocatable
2891 || !f
->sym
->attr
.optional
2892 || (gfc_option
.allow_std
& GFC_STD_F2008
) == 0))))
2895 && (!f
->sym
->attr
.optional
2896 || (f
->sym
->ts
.type
!= BT_CLASS
&& f
->sym
->attr
.allocatable
)
2897 || (f
->sym
->ts
.type
== BT_CLASS
2898 && CLASS_DATA (f
->sym
)->attr
.allocatable
)))
2899 gfc_error ("Unexpected NULL() intrinsic at %L to dummy %qs",
2900 where
, f
->sym
->name
);
2902 gfc_error ("Fortran 2008: Null pointer at %L to non-pointer "
2903 "dummy %qs", where
, f
->sym
->name
);
2908 if (!compare_parameter (f
->sym
, a
->expr
, ranks_must_agree
,
2909 is_elemental
, where
))
2912 /* TS 29113, 6.3p2. */
2913 if (f
->sym
->ts
.type
== BT_ASSUMED
2914 && (a
->expr
->ts
.type
== BT_DERIVED
2915 || (a
->expr
->ts
.type
== BT_CLASS
&& CLASS_DATA (a
->expr
))))
2917 gfc_namespace
*f2k_derived
;
2919 f2k_derived
= a
->expr
->ts
.type
== BT_DERIVED
2920 ? a
->expr
->ts
.u
.derived
->f2k_derived
2921 : CLASS_DATA (a
->expr
)->ts
.u
.derived
->f2k_derived
;
2924 && (f2k_derived
->finalizers
|| f2k_derived
->tb_sym_root
))
2926 gfc_error ("Actual argument at %L to assumed-type dummy is of "
2927 "derived type with type-bound or FINAL procedures",
2933 /* Special case for character arguments. For allocatable, pointer
2934 and assumed-shape dummies, the string length needs to match
2936 if (a
->expr
->ts
.type
== BT_CHARACTER
2937 && a
->expr
->ts
.u
.cl
&& a
->expr
->ts
.u
.cl
->length
2938 && a
->expr
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
2939 && f
->sym
->ts
.type
== BT_CHARACTER
&& f
->sym
->ts
.u
.cl
2940 && f
->sym
->ts
.u
.cl
->length
2941 && f
->sym
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
2942 && (f
->sym
->attr
.pointer
|| f
->sym
->attr
.allocatable
2943 || (f
->sym
->as
&& f
->sym
->as
->type
== AS_ASSUMED_SHAPE
))
2944 && (mpz_cmp (a
->expr
->ts
.u
.cl
->length
->value
.integer
,
2945 f
->sym
->ts
.u
.cl
->length
->value
.integer
) != 0))
2947 if (where
&& (f
->sym
->attr
.pointer
|| f
->sym
->attr
.allocatable
))
2948 gfc_warning (OPT_Wargument_mismatch
,
2949 "Character length mismatch (%ld/%ld) between actual "
2950 "argument and pointer or allocatable dummy argument "
2952 mpz_get_si (a
->expr
->ts
.u
.cl
->length
->value
.integer
),
2953 mpz_get_si (f
->sym
->ts
.u
.cl
->length
->value
.integer
),
2954 f
->sym
->name
, &a
->expr
->where
);
2956 gfc_warning (OPT_Wargument_mismatch
,
2957 "Character length mismatch (%ld/%ld) between actual "
2958 "argument and assumed-shape dummy argument %qs "
2960 mpz_get_si (a
->expr
->ts
.u
.cl
->length
->value
.integer
),
2961 mpz_get_si (f
->sym
->ts
.u
.cl
->length
->value
.integer
),
2962 f
->sym
->name
, &a
->expr
->where
);
2966 if ((f
->sym
->attr
.pointer
|| f
->sym
->attr
.allocatable
)
2967 && f
->sym
->ts
.deferred
!= a
->expr
->ts
.deferred
2968 && a
->expr
->ts
.type
== BT_CHARACTER
)
2971 gfc_error ("Actual argument at %L to allocatable or "
2972 "pointer dummy argument %qs must have a deferred "
2973 "length type parameter if and only if the dummy has one",
2974 &a
->expr
->where
, f
->sym
->name
);
2978 if (f
->sym
->ts
.type
== BT_CLASS
)
2979 goto skip_size_check
;
2981 actual_size
= get_expr_storage_size (a
->expr
);
2982 formal_size
= get_sym_storage_size (f
->sym
);
2983 if (actual_size
!= 0 && actual_size
< formal_size
2984 && a
->expr
->ts
.type
!= BT_PROCEDURE
2985 && f
->sym
->attr
.flavor
!= FL_PROCEDURE
)
2987 if (a
->expr
->ts
.type
== BT_CHARACTER
&& !f
->sym
->as
&& where
)
2988 gfc_warning (OPT_Wargument_mismatch
,
2989 "Character length of actual argument shorter "
2990 "than of dummy argument %qs (%lu/%lu) at %L",
2991 f
->sym
->name
, actual_size
, formal_size
,
2994 gfc_warning (OPT_Wargument_mismatch
,
2995 "Actual argument contains too few "
2996 "elements for dummy argument %qs (%lu/%lu) at %L",
2997 f
->sym
->name
, actual_size
, formal_size
,
3004 /* Satisfy F03:12.4.1.3 by ensuring that a procedure pointer actual
3005 argument is provided for a procedure pointer formal argument. */
3006 if (f
->sym
->attr
.proc_pointer
3007 && !((a
->expr
->expr_type
== EXPR_VARIABLE
3008 && (a
->expr
->symtree
->n
.sym
->attr
.proc_pointer
3009 || gfc_is_proc_ptr_comp (a
->expr
)))
3010 || (a
->expr
->expr_type
== EXPR_FUNCTION
3011 && is_procptr_result (a
->expr
))))
3014 gfc_error ("Expected a procedure pointer for argument %qs at %L",
3015 f
->sym
->name
, &a
->expr
->where
);
3019 /* Satisfy F03:12.4.1.3 by ensuring that a procedure actual argument is
3020 provided for a procedure formal argument. */
3021 if (f
->sym
->attr
.flavor
== FL_PROCEDURE
3022 && !((a
->expr
->expr_type
== EXPR_VARIABLE
3023 && (a
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
3024 || a
->expr
->symtree
->n
.sym
->attr
.proc_pointer
3025 || gfc_is_proc_ptr_comp (a
->expr
)))
3026 || (a
->expr
->expr_type
== EXPR_FUNCTION
3027 && is_procptr_result (a
->expr
))))
3030 gfc_error ("Expected a procedure for argument %qs at %L",
3031 f
->sym
->name
, &a
->expr
->where
);
3035 if (f
->sym
->as
&& f
->sym
->as
->type
== AS_ASSUMED_SHAPE
3036 && a
->expr
->expr_type
== EXPR_VARIABLE
3037 && a
->expr
->symtree
->n
.sym
->as
3038 && a
->expr
->symtree
->n
.sym
->as
->type
== AS_ASSUMED_SIZE
3039 && (a
->expr
->ref
== NULL
3040 || (a
->expr
->ref
->type
== REF_ARRAY
3041 && a
->expr
->ref
->u
.ar
.type
== AR_FULL
)))
3044 gfc_error ("Actual argument for %qs cannot be an assumed-size"
3045 " array at %L", f
->sym
->name
, where
);
3049 if (a
->expr
->expr_type
!= EXPR_NULL
3050 && compare_pointer (f
->sym
, a
->expr
) == 0)
3053 gfc_error ("Actual argument for %qs must be a pointer at %L",
3054 f
->sym
->name
, &a
->expr
->where
);
3058 if (a
->expr
->expr_type
!= EXPR_NULL
3059 && (gfc_option
.allow_std
& GFC_STD_F2008
) == 0
3060 && compare_pointer (f
->sym
, a
->expr
) == 2)
3063 gfc_error ("Fortran 2008: Non-pointer actual argument at %L to "
3064 "pointer dummy %qs", &a
->expr
->where
,f
->sym
->name
);
3069 /* Fortran 2008, C1242. */
3070 if (f
->sym
->attr
.pointer
&& gfc_is_coindexed (a
->expr
))
3073 gfc_error ("Coindexed actual argument at %L to pointer "
3075 &a
->expr
->where
, f
->sym
->name
);
3079 /* Fortran 2008, 12.5.2.5 (no constraint). */
3080 if (a
->expr
->expr_type
== EXPR_VARIABLE
3081 && f
->sym
->attr
.intent
!= INTENT_IN
3082 && f
->sym
->attr
.allocatable
3083 && gfc_is_coindexed (a
->expr
))
3086 gfc_error ("Coindexed actual argument at %L to allocatable "
3087 "dummy %qs requires INTENT(IN)",
3088 &a
->expr
->where
, f
->sym
->name
);
3092 /* Fortran 2008, C1237. */
3093 if (a
->expr
->expr_type
== EXPR_VARIABLE
3094 && (f
->sym
->attr
.asynchronous
|| f
->sym
->attr
.volatile_
)
3095 && gfc_is_coindexed (a
->expr
)
3096 && (a
->expr
->symtree
->n
.sym
->attr
.volatile_
3097 || a
->expr
->symtree
->n
.sym
->attr
.asynchronous
))
3100 gfc_error ("Coindexed ASYNCHRONOUS or VOLATILE actual argument at "
3101 "%L requires that dummy %qs has neither "
3102 "ASYNCHRONOUS nor VOLATILE", &a
->expr
->where
,
3107 /* Fortran 2008, 12.5.2.4 (no constraint). */
3108 if (a
->expr
->expr_type
== EXPR_VARIABLE
3109 && f
->sym
->attr
.intent
!= INTENT_IN
&& !f
->sym
->attr
.value
3110 && gfc_is_coindexed (a
->expr
)
3111 && gfc_has_ultimate_allocatable (a
->expr
))
3114 gfc_error ("Coindexed actual argument at %L with allocatable "
3115 "ultimate component to dummy %qs requires either VALUE "
3116 "or INTENT(IN)", &a
->expr
->where
, f
->sym
->name
);
3120 if (f
->sym
->ts
.type
== BT_CLASS
3121 && CLASS_DATA (f
->sym
)->attr
.allocatable
3122 && gfc_is_class_array_ref (a
->expr
, &full_array
)
3126 gfc_error ("Actual CLASS array argument for %qs must be a full "
3127 "array at %L", f
->sym
->name
, &a
->expr
->where
);
3132 if (a
->expr
->expr_type
!= EXPR_NULL
3133 && !compare_allocatable (f
->sym
, a
->expr
))
3136 gfc_error ("Actual argument for %qs must be ALLOCATABLE at %L",
3137 f
->sym
->name
, &a
->expr
->where
);
3141 /* Check intent = OUT/INOUT for definable actual argument. */
3142 if ((f
->sym
->attr
.intent
== INTENT_OUT
3143 || f
->sym
->attr
.intent
== INTENT_INOUT
))
3145 const char* context
= (where
3146 ? _("actual argument to INTENT = OUT/INOUT")
3149 if (((f
->sym
->ts
.type
== BT_CLASS
&& f
->sym
->attr
.class_ok
3150 && CLASS_DATA (f
->sym
)->attr
.class_pointer
)
3151 || (f
->sym
->ts
.type
!= BT_CLASS
&& f
->sym
->attr
.pointer
))
3152 && !gfc_check_vardef_context (a
->expr
, true, false, false, context
))
3154 if (!gfc_check_vardef_context (a
->expr
, false, false, false, context
))
3158 if ((f
->sym
->attr
.intent
== INTENT_OUT
3159 || f
->sym
->attr
.intent
== INTENT_INOUT
3160 || f
->sym
->attr
.volatile_
3161 || f
->sym
->attr
.asynchronous
)
3162 && gfc_has_vector_subscript (a
->expr
))
3165 gfc_error ("Array-section actual argument with vector "
3166 "subscripts at %L is incompatible with INTENT(OUT), "
3167 "INTENT(INOUT), VOLATILE or ASYNCHRONOUS attribute "
3168 "of the dummy argument %qs",
3169 &a
->expr
->where
, f
->sym
->name
);
3173 /* C1232 (R1221) For an actual argument which is an array section or
3174 an assumed-shape array, the dummy argument shall be an assumed-
3175 shape array, if the dummy argument has the VOLATILE attribute. */
3177 if (f
->sym
->attr
.volatile_
3178 && a
->expr
->expr_type
== EXPR_VARIABLE
3179 && a
->expr
->symtree
->n
.sym
->as
3180 && a
->expr
->symtree
->n
.sym
->as
->type
== AS_ASSUMED_SHAPE
3181 && !(f
->sym
->as
&& f
->sym
->as
->type
== AS_ASSUMED_SHAPE
))
3184 gfc_error ("Assumed-shape actual argument at %L is "
3185 "incompatible with the non-assumed-shape "
3186 "dummy argument %qs due to VOLATILE attribute",
3187 &a
->expr
->where
,f
->sym
->name
);
3191 /* Find the last array_ref. */
3192 actual_arr_ref
= NULL
;
3194 actual_arr_ref
= gfc_find_array_ref (a
->expr
, true);
3196 if (f
->sym
->attr
.volatile_
3197 && actual_arr_ref
&& actual_arr_ref
->type
== AR_SECTION
3198 && !(f
->sym
->as
&& f
->sym
->as
->type
== AS_ASSUMED_SHAPE
))
3201 gfc_error ("Array-section actual argument at %L is "
3202 "incompatible with the non-assumed-shape "
3203 "dummy argument %qs due to VOLATILE attribute",
3204 &a
->expr
->where
, f
->sym
->name
);
3208 /* C1233 (R1221) For an actual argument which is a pointer array, the
3209 dummy argument shall be an assumed-shape or pointer array, if the
3210 dummy argument has the VOLATILE attribute. */
3212 if (f
->sym
->attr
.volatile_
3213 && a
->expr
->expr_type
== EXPR_VARIABLE
3214 && a
->expr
->symtree
->n
.sym
->attr
.pointer
3215 && a
->expr
->symtree
->n
.sym
->as
3217 && (f
->sym
->as
->type
== AS_ASSUMED_SHAPE
3218 || f
->sym
->attr
.pointer
)))
3221 gfc_error ("Pointer-array actual argument at %L requires "
3222 "an assumed-shape or pointer-array dummy "
3223 "argument %qs due to VOLATILE attribute",
3224 &a
->expr
->where
,f
->sym
->name
);
3235 /* Make sure missing actual arguments are optional. */
3237 for (f
= formal
; f
; f
= f
->next
, i
++)
3239 if (new_arg
[i
] != NULL
)
3244 gfc_error ("Missing alternate return spec in subroutine call "
3248 if (!f
->sym
->attr
.optional
)
3251 gfc_error ("Missing actual argument for argument %qs at %L",
3252 f
->sym
->name
, where
);
3257 /* The argument lists are compatible. We now relink a new actual
3258 argument list with null arguments in the right places. The head
3259 of the list remains the head. */
3260 for (i
= 0; i
< n
; i
++)
3261 if (new_arg
[i
] == NULL
)
3262 new_arg
[i
] = gfc_get_actual_arglist ();
3266 std::swap (*new_arg
[0], *actual
);
3267 std::swap (new_arg
[0], new_arg
[na
]);
3270 for (i
= 0; i
< n
- 1; i
++)
3271 new_arg
[i
]->next
= new_arg
[i
+ 1];
3273 new_arg
[i
]->next
= NULL
;
3275 if (*ap
== NULL
&& n
> 0)
3278 /* Note the types of omitted optional arguments. */
3279 for (a
= *ap
, f
= formal
; a
; a
= a
->next
, f
= f
->next
)
3280 if (a
->expr
== NULL
&& a
->label
== NULL
)
3281 a
->missing_arg_type
= f
->sym
->ts
.type
;
3289 gfc_formal_arglist
*f
;
3290 gfc_actual_arglist
*a
;
3294 /* qsort comparison function for argument pairs, with the following
3296 - p->a->expr == NULL
3297 - p->a->expr->expr_type != EXPR_VARIABLE
3298 - by gfc_symbol pointer value (larger first). */
3301 pair_cmp (const void *p1
, const void *p2
)
3303 const gfc_actual_arglist
*a1
, *a2
;
3305 /* *p1 and *p2 are elements of the to-be-sorted array. */
3306 a1
= ((const argpair
*) p1
)->a
;
3307 a2
= ((const argpair
*) p2
)->a
;
3316 if (a1
->expr
->expr_type
!= EXPR_VARIABLE
)
3318 if (a2
->expr
->expr_type
!= EXPR_VARIABLE
)
3322 if (a2
->expr
->expr_type
!= EXPR_VARIABLE
)
3324 if (a1
->expr
->symtree
->n
.sym
> a2
->expr
->symtree
->n
.sym
)
3326 return a1
->expr
->symtree
->n
.sym
< a2
->expr
->symtree
->n
.sym
;
3330 /* Given two expressions from some actual arguments, test whether they
3331 refer to the same expression. The analysis is conservative.
3332 Returning false will produce no warning. */
3335 compare_actual_expr (gfc_expr
*e1
, gfc_expr
*e2
)
3337 const gfc_ref
*r1
, *r2
;
3340 || e1
->expr_type
!= EXPR_VARIABLE
3341 || e2
->expr_type
!= EXPR_VARIABLE
3342 || e1
->symtree
->n
.sym
!= e2
->symtree
->n
.sym
)
3345 /* TODO: improve comparison, see expr.c:show_ref(). */
3346 for (r1
= e1
->ref
, r2
= e2
->ref
; r1
&& r2
; r1
= r1
->next
, r2
= r2
->next
)
3348 if (r1
->type
!= r2
->type
)
3353 if (r1
->u
.ar
.type
!= r2
->u
.ar
.type
)
3355 /* TODO: At the moment, consider only full arrays;
3356 we could do better. */
3357 if (r1
->u
.ar
.type
!= AR_FULL
|| r2
->u
.ar
.type
!= AR_FULL
)
3362 if (r1
->u
.c
.component
!= r2
->u
.c
.component
)
3370 gfc_internal_error ("compare_actual_expr(): Bad component code");
3379 /* Given formal and actual argument lists that correspond to one
3380 another, check that identical actual arguments aren't not
3381 associated with some incompatible INTENTs. */
3384 check_some_aliasing (gfc_formal_arglist
*f
, gfc_actual_arglist
*a
)
3386 sym_intent f1_intent
, f2_intent
;
3387 gfc_formal_arglist
*f1
;
3388 gfc_actual_arglist
*a1
;
3394 for (f1
= f
, a1
= a
;; f1
= f1
->next
, a1
= a1
->next
)
3396 if (f1
== NULL
&& a1
== NULL
)
3398 if (f1
== NULL
|| a1
== NULL
)
3399 gfc_internal_error ("check_some_aliasing(): List mismatch");
3404 p
= XALLOCAVEC (argpair
, n
);
3406 for (i
= 0, f1
= f
, a1
= a
; i
< n
; i
++, f1
= f1
->next
, a1
= a1
->next
)
3412 qsort (p
, n
, sizeof (argpair
), pair_cmp
);
3414 for (i
= 0; i
< n
; i
++)
3417 || p
[i
].a
->expr
->expr_type
!= EXPR_VARIABLE
3418 || p
[i
].a
->expr
->ts
.type
== BT_PROCEDURE
)
3420 f1_intent
= p
[i
].f
->sym
->attr
.intent
;
3421 for (j
= i
+ 1; j
< n
; j
++)
3423 /* Expected order after the sort. */
3424 if (!p
[j
].a
->expr
|| p
[j
].a
->expr
->expr_type
!= EXPR_VARIABLE
)
3425 gfc_internal_error ("check_some_aliasing(): corrupted data");
3427 /* Are the expression the same? */
3428 if (!compare_actual_expr (p
[i
].a
->expr
, p
[j
].a
->expr
))
3430 f2_intent
= p
[j
].f
->sym
->attr
.intent
;
3431 if ((f1_intent
== INTENT_IN
&& f2_intent
== INTENT_OUT
)
3432 || (f1_intent
== INTENT_OUT
&& f2_intent
== INTENT_IN
)
3433 || (f1_intent
== INTENT_OUT
&& f2_intent
== INTENT_OUT
))
3435 gfc_warning (0, "Same actual argument associated with INTENT(%s) "
3436 "argument %qs and INTENT(%s) argument %qs at %L",
3437 gfc_intent_string (f1_intent
), p
[i
].f
->sym
->name
,
3438 gfc_intent_string (f2_intent
), p
[j
].f
->sym
->name
,
3439 &p
[i
].a
->expr
->where
);
3449 /* Given formal and actual argument lists that correspond to one
3450 another, check that they are compatible in the sense that intents
3451 are not mismatched. */
3454 check_intents (gfc_formal_arglist
*f
, gfc_actual_arglist
*a
)
3456 sym_intent f_intent
;
3458 for (;; f
= f
->next
, a
= a
->next
)
3462 if (f
== NULL
&& a
== NULL
)
3464 if (f
== NULL
|| a
== NULL
)
3465 gfc_internal_error ("check_intents(): List mismatch");
3467 if (a
->expr
&& a
->expr
->expr_type
== EXPR_FUNCTION
3468 && a
->expr
->value
.function
.isym
3469 && a
->expr
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
3470 expr
= a
->expr
->value
.function
.actual
->expr
;
3474 if (expr
== NULL
|| expr
->expr_type
!= EXPR_VARIABLE
)
3477 f_intent
= f
->sym
->attr
.intent
;
3479 if (gfc_pure (NULL
) && gfc_impure_variable (expr
->symtree
->n
.sym
))
3481 if ((f
->sym
->ts
.type
== BT_CLASS
&& f
->sym
->attr
.class_ok
3482 && CLASS_DATA (f
->sym
)->attr
.class_pointer
)
3483 || (f
->sym
->ts
.type
!= BT_CLASS
&& f
->sym
->attr
.pointer
))
3485 gfc_error ("Procedure argument at %L is local to a PURE "
3486 "procedure and has the POINTER attribute",
3492 /* Fortran 2008, C1283. */
3493 if (gfc_pure (NULL
) && gfc_is_coindexed (expr
))
3495 if (f_intent
== INTENT_INOUT
|| f_intent
== INTENT_OUT
)
3497 gfc_error ("Coindexed actual argument at %L in PURE procedure "
3498 "is passed to an INTENT(%s) argument",
3499 &expr
->where
, gfc_intent_string (f_intent
));
3503 if ((f
->sym
->ts
.type
== BT_CLASS
&& f
->sym
->attr
.class_ok
3504 && CLASS_DATA (f
->sym
)->attr
.class_pointer
)
3505 || (f
->sym
->ts
.type
!= BT_CLASS
&& f
->sym
->attr
.pointer
))
3507 gfc_error ("Coindexed actual argument at %L in PURE procedure "
3508 "is passed to a POINTER dummy argument",
3514 /* F2008, Section 12.5.2.4. */
3515 if (expr
->ts
.type
== BT_CLASS
&& f
->sym
->ts
.type
== BT_CLASS
3516 && gfc_is_coindexed (expr
))
3518 gfc_error ("Coindexed polymorphic actual argument at %L is passed "
3519 "polymorphic dummy argument %qs",
3520 &expr
->where
, f
->sym
->name
);
3529 /* Check how a procedure is used against its interface. If all goes
3530 well, the actual argument list will also end up being properly
3534 gfc_procedure_use (gfc_symbol
*sym
, gfc_actual_arglist
**ap
, locus
*where
)
3536 gfc_formal_arglist
*dummy_args
;
3538 /* Warn about calls with an implicit interface. Special case
3539 for calling a ISO_C_BINDING because c_loc and c_funloc
3540 are pseudo-unknown. Additionally, warn about procedures not
3541 explicitly declared at all if requested. */
3542 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
&& !sym
->attr
.is_iso_c
)
3544 if (sym
->ns
->has_implicit_none_export
&& sym
->attr
.proc
== PROC_UNKNOWN
)
3546 gfc_error ("Procedure %qs called at %L is not explicitly declared",
3550 if (warn_implicit_interface
)
3551 gfc_warning (OPT_Wimplicit_interface
,
3552 "Procedure %qs called with an implicit interface at %L",
3554 else if (warn_implicit_procedure
&& sym
->attr
.proc
== PROC_UNKNOWN
)
3555 gfc_warning (OPT_Wimplicit_procedure
,
3556 "Procedure %qs called at %L is not explicitly declared",
3560 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
)
3562 gfc_actual_arglist
*a
;
3564 if (sym
->attr
.pointer
)
3566 gfc_error ("The pointer object %qs at %L must have an explicit "
3567 "function interface or be declared as array",
3572 if (sym
->attr
.allocatable
&& !sym
->attr
.external
)
3574 gfc_error ("The allocatable object %qs at %L must have an explicit "
3575 "function interface or be declared as array",
3580 if (sym
->attr
.allocatable
)
3582 gfc_error ("Allocatable function %qs at %L must have an explicit "
3583 "function interface", sym
->name
, where
);
3587 for (a
= *ap
; a
; a
= a
->next
)
3589 /* Skip g77 keyword extensions like %VAL, %REF, %LOC. */
3590 if (a
->name
!= NULL
&& a
->name
[0] != '%')
3592 gfc_error ("Keyword argument requires explicit interface "
3593 "for procedure %qs at %L", sym
->name
, &a
->expr
->where
);
3597 /* TS 29113, 6.2. */
3598 if (a
->expr
&& a
->expr
->ts
.type
== BT_ASSUMED
3599 && sym
->intmod_sym_id
!= ISOCBINDING_LOC
)
3601 gfc_error ("Assumed-type argument %s at %L requires an explicit "
3602 "interface", a
->expr
->symtree
->n
.sym
->name
,
3607 /* F2008, C1303 and C1304. */
3609 && (a
->expr
->ts
.type
== BT_DERIVED
|| a
->expr
->ts
.type
== BT_CLASS
)
3610 && ((a
->expr
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
3611 && a
->expr
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
3612 || gfc_expr_attr (a
->expr
).lock_comp
))
3614 gfc_error ("Actual argument of LOCK_TYPE or with LOCK_TYPE "
3615 "component at %L requires an explicit interface for "
3616 "procedure %qs", &a
->expr
->where
, sym
->name
);
3621 && (a
->expr
->ts
.type
== BT_DERIVED
|| a
->expr
->ts
.type
== BT_CLASS
)
3622 && ((a
->expr
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
3623 && a
->expr
->ts
.u
.derived
->intmod_sym_id
3624 == ISOFORTRAN_EVENT_TYPE
)
3625 || gfc_expr_attr (a
->expr
).event_comp
))
3627 gfc_error ("Actual argument of EVENT_TYPE or with EVENT_TYPE "
3628 "component at %L requires an explicit interface for "
3629 "procedure %qs", &a
->expr
->where
, sym
->name
);
3633 if (a
->expr
&& a
->expr
->expr_type
== EXPR_NULL
3634 && a
->expr
->ts
.type
== BT_UNKNOWN
)
3636 gfc_error ("MOLD argument to NULL required at %L", &a
->expr
->where
);
3640 /* TS 29113, C407b. */
3641 if (a
->expr
&& a
->expr
->expr_type
== EXPR_VARIABLE
3642 && symbol_rank (a
->expr
->symtree
->n
.sym
) == -1)
3644 gfc_error ("Assumed-rank argument requires an explicit interface "
3645 "at %L", &a
->expr
->where
);
3653 dummy_args
= gfc_sym_get_dummy_args (sym
);
3655 if (!compare_actual_formal (ap
, dummy_args
, 0, sym
->attr
.elemental
, where
))
3658 if (!check_intents (dummy_args
, *ap
))
3662 check_some_aliasing (dummy_args
, *ap
);
3668 /* Check how a procedure pointer component is used against its interface.
3669 If all goes well, the actual argument list will also end up being properly
3670 sorted. Completely analogous to gfc_procedure_use. */
3673 gfc_ppc_use (gfc_component
*comp
, gfc_actual_arglist
**ap
, locus
*where
)
3675 /* Warn about calls with an implicit interface. Special case
3676 for calling a ISO_C_BINDING because c_loc and c_funloc
3677 are pseudo-unknown. */
3678 if (warn_implicit_interface
3679 && comp
->attr
.if_source
== IFSRC_UNKNOWN
3680 && !comp
->attr
.is_iso_c
)
3681 gfc_warning (OPT_Wimplicit_interface
,
3682 "Procedure pointer component %qs called with an implicit "
3683 "interface at %L", comp
->name
, where
);
3685 if (comp
->attr
.if_source
== IFSRC_UNKNOWN
)
3687 gfc_actual_arglist
*a
;
3688 for (a
= *ap
; a
; a
= a
->next
)
3690 /* Skip g77 keyword extensions like %VAL, %REF, %LOC. */
3691 if (a
->name
!= NULL
&& a
->name
[0] != '%')
3693 gfc_error ("Keyword argument requires explicit interface "
3694 "for procedure pointer component %qs at %L",
3695 comp
->name
, &a
->expr
->where
);
3703 if (!compare_actual_formal (ap
, comp
->ts
.interface
->formal
, 0,
3704 comp
->attr
.elemental
, where
))
3707 check_intents (comp
->ts
.interface
->formal
, *ap
);
3709 check_some_aliasing (comp
->ts
.interface
->formal
, *ap
);
3713 /* Try if an actual argument list matches the formal list of a symbol,
3714 respecting the symbol's attributes like ELEMENTAL. This is used for
3715 GENERIC resolution. */
3718 gfc_arglist_matches_symbol (gfc_actual_arglist
** args
, gfc_symbol
* sym
)
3720 gfc_formal_arglist
*dummy_args
;
3723 if (sym
->attr
.flavor
!= FL_PROCEDURE
)
3726 dummy_args
= gfc_sym_get_dummy_args (sym
);
3728 r
= !sym
->attr
.elemental
;
3729 if (compare_actual_formal (args
, dummy_args
, r
, !r
, NULL
))
3731 check_intents (dummy_args
, *args
);
3733 check_some_aliasing (dummy_args
, *args
);
3741 /* Given an interface pointer and an actual argument list, search for
3742 a formal argument list that matches the actual. If found, returns
3743 a pointer to the symbol of the correct interface. Returns NULL if
3747 gfc_search_interface (gfc_interface
*intr
, int sub_flag
,
3748 gfc_actual_arglist
**ap
)
3750 gfc_symbol
*elem_sym
= NULL
;
3751 gfc_symbol
*null_sym
= NULL
;
3752 locus null_expr_loc
;
3753 gfc_actual_arglist
*a
;
3754 bool has_null_arg
= false;
3756 for (a
= *ap
; a
; a
= a
->next
)
3757 if (a
->expr
&& a
->expr
->expr_type
== EXPR_NULL
3758 && a
->expr
->ts
.type
== BT_UNKNOWN
)
3760 has_null_arg
= true;
3761 null_expr_loc
= a
->expr
->where
;
3765 for (; intr
; intr
= intr
->next
)
3767 if (gfc_fl_struct (intr
->sym
->attr
.flavor
))
3769 if (sub_flag
&& intr
->sym
->attr
.function
)
3771 if (!sub_flag
&& intr
->sym
->attr
.subroutine
)
3774 if (gfc_arglist_matches_symbol (ap
, intr
->sym
))
3776 if (has_null_arg
&& null_sym
)
3778 gfc_error ("MOLD= required in NULL() argument at %L: Ambiguity "
3779 "between specific functions %s and %s",
3780 &null_expr_loc
, null_sym
->name
, intr
->sym
->name
);
3783 else if (has_null_arg
)
3785 null_sym
= intr
->sym
;
3789 /* Satisfy 12.4.4.1 such that an elemental match has lower
3790 weight than a non-elemental match. */
3791 if (intr
->sym
->attr
.elemental
)
3793 elem_sym
= intr
->sym
;
3803 return elem_sym
? elem_sym
: NULL
;
3807 /* Do a brute force recursive search for a symbol. */
3809 static gfc_symtree
*
3810 find_symtree0 (gfc_symtree
*root
, gfc_symbol
*sym
)
3814 if (root
->n
.sym
== sym
)
3819 st
= find_symtree0 (root
->left
, sym
);
3820 if (root
->right
&& ! st
)
3821 st
= find_symtree0 (root
->right
, sym
);
3826 /* Find a symtree for a symbol. */
3829 gfc_find_sym_in_symtree (gfc_symbol
*sym
)
3834 /* First try to find it by name. */
3835 gfc_find_sym_tree (sym
->name
, gfc_current_ns
, 1, &st
);
3836 if (st
&& st
->n
.sym
== sym
)
3839 /* If it's been renamed, resort to a brute-force search. */
3840 /* TODO: avoid having to do this search. If the symbol doesn't exist
3841 in the symtree for the current namespace, it should probably be added. */
3842 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
3844 st
= find_symtree0 (ns
->sym_root
, sym
);
3848 gfc_internal_error ("Unable to find symbol %qs", sym
->name
);
3853 /* See if the arglist to an operator-call contains a derived-type argument
3854 with a matching type-bound operator. If so, return the matching specific
3855 procedure defined as operator-target as well as the base-object to use
3856 (which is the found derived-type argument with operator). The generic
3857 name, if any, is transmitted to the final expression via 'gname'. */
3859 static gfc_typebound_proc
*
3860 matching_typebound_op (gfc_expr
** tb_base
,
3861 gfc_actual_arglist
* args
,
3862 gfc_intrinsic_op op
, const char* uop
,
3863 const char ** gname
)
3865 gfc_actual_arglist
* base
;
3867 for (base
= args
; base
; base
= base
->next
)
3868 if (base
->expr
->ts
.type
== BT_DERIVED
|| base
->expr
->ts
.type
== BT_CLASS
)
3870 gfc_typebound_proc
* tb
;
3871 gfc_symbol
* derived
;
3874 while (base
->expr
->expr_type
== EXPR_OP
3875 && base
->expr
->value
.op
.op
== INTRINSIC_PARENTHESES
)
3876 base
->expr
= base
->expr
->value
.op
.op1
;
3878 if (base
->expr
->ts
.type
== BT_CLASS
)
3880 if (!base
->expr
->ts
.u
.derived
|| CLASS_DATA (base
->expr
) == NULL
3881 || !gfc_expr_attr (base
->expr
).class_ok
)
3883 derived
= CLASS_DATA (base
->expr
)->ts
.u
.derived
;
3886 derived
= base
->expr
->ts
.u
.derived
;
3888 if (op
== INTRINSIC_USER
)
3890 gfc_symtree
* tb_uop
;
3893 tb_uop
= gfc_find_typebound_user_op (derived
, &result
, uop
,
3902 tb
= gfc_find_typebound_intrinsic_op (derived
, &result
, op
,
3905 /* This means we hit a PRIVATE operator which is use-associated and
3906 should thus not be seen. */
3910 /* Look through the super-type hierarchy for a matching specific
3912 for (; tb
; tb
= tb
->overridden
)
3916 gcc_assert (tb
->is_generic
);
3917 for (g
= tb
->u
.generic
; g
; g
= g
->next
)
3920 gfc_actual_arglist
* argcopy
;
3923 gcc_assert (g
->specific
);
3924 if (g
->specific
->error
)
3927 target
= g
->specific
->u
.specific
->n
.sym
;
3929 /* Check if this arglist matches the formal. */
3930 argcopy
= gfc_copy_actual_arglist (args
);
3931 matches
= gfc_arglist_matches_symbol (&argcopy
, target
);
3932 gfc_free_actual_arglist (argcopy
);
3934 /* Return if we found a match. */
3937 *tb_base
= base
->expr
;
3938 *gname
= g
->specific_st
->name
;
3949 /* For the 'actual arglist' of an operator call and a specific typebound
3950 procedure that has been found the target of a type-bound operator, build the
3951 appropriate EXPR_COMPCALL and resolve it. We take this indirection over
3952 type-bound procedures rather than resolving type-bound operators 'directly'
3953 so that we can reuse the existing logic. */
3956 build_compcall_for_operator (gfc_expr
* e
, gfc_actual_arglist
* actual
,
3957 gfc_expr
* base
, gfc_typebound_proc
* target
,
3960 e
->expr_type
= EXPR_COMPCALL
;
3961 e
->value
.compcall
.tbp
= target
;
3962 e
->value
.compcall
.name
= gname
? gname
: "$op";
3963 e
->value
.compcall
.actual
= actual
;
3964 e
->value
.compcall
.base_object
= base
;
3965 e
->value
.compcall
.ignore_pass
= 1;
3966 e
->value
.compcall
.assign
= 0;
3967 if (e
->ts
.type
== BT_UNKNOWN
3968 && target
->function
)
3970 if (target
->is_generic
)
3971 e
->ts
= target
->u
.generic
->specific
->u
.specific
->n
.sym
->ts
;
3973 e
->ts
= target
->u
.specific
->n
.sym
->ts
;
3978 /* This subroutine is called when an expression is being resolved.
3979 The expression node in question is either a user defined operator
3980 or an intrinsic operator with arguments that aren't compatible
3981 with the operator. This subroutine builds an actual argument list
3982 corresponding to the operands, then searches for a compatible
3983 interface. If one is found, the expression node is replaced with
3984 the appropriate function call. We use the 'match' enum to specify
3985 whether a replacement has been made or not, or if an error occurred. */
3988 gfc_extend_expr (gfc_expr
*e
)
3990 gfc_actual_arglist
*actual
;
3996 gfc_typebound_proc
* tbo
;
4001 actual
= gfc_get_actual_arglist ();
4002 actual
->expr
= e
->value
.op
.op1
;
4006 if (e
->value
.op
.op2
!= NULL
)
4008 actual
->next
= gfc_get_actual_arglist ();
4009 actual
->next
->expr
= e
->value
.op
.op2
;
4012 i
= fold_unary_intrinsic (e
->value
.op
.op
);
4014 /* See if we find a matching type-bound operator. */
4015 if (i
== INTRINSIC_USER
)
4016 tbo
= matching_typebound_op (&tb_base
, actual
,
4017 i
, e
->value
.op
.uop
->name
, &gname
);
4021 #define CHECK_OS_COMPARISON(comp) \
4022 case INTRINSIC_##comp: \
4023 case INTRINSIC_##comp##_OS: \
4024 tbo = matching_typebound_op (&tb_base, actual, \
4025 INTRINSIC_##comp, NULL, &gname); \
4027 tbo = matching_typebound_op (&tb_base, actual, \
4028 INTRINSIC_##comp##_OS, NULL, &gname); \
4030 CHECK_OS_COMPARISON(EQ
)
4031 CHECK_OS_COMPARISON(NE
)
4032 CHECK_OS_COMPARISON(GT
)
4033 CHECK_OS_COMPARISON(GE
)
4034 CHECK_OS_COMPARISON(LT
)
4035 CHECK_OS_COMPARISON(LE
)
4036 #undef CHECK_OS_COMPARISON
4039 tbo
= matching_typebound_op (&tb_base
, actual
, i
, NULL
, &gname
);
4043 /* If there is a matching typebound-operator, replace the expression with
4044 a call to it and succeed. */
4047 gcc_assert (tb_base
);
4048 build_compcall_for_operator (e
, actual
, tb_base
, tbo
, gname
);
4050 if (!gfc_resolve_expr (e
))
4056 if (i
== INTRINSIC_USER
)
4058 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
4060 uop
= gfc_find_uop (e
->value
.op
.uop
->name
, ns
);
4064 sym
= gfc_search_interface (uop
->op
, 0, &actual
);
4071 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
4073 /* Due to the distinction between '==' and '.eq.' and friends, one has
4074 to check if either is defined. */
4077 #define CHECK_OS_COMPARISON(comp) \
4078 case INTRINSIC_##comp: \
4079 case INTRINSIC_##comp##_OS: \
4080 sym = gfc_search_interface (ns->op[INTRINSIC_##comp], 0, &actual); \
4082 sym = gfc_search_interface (ns->op[INTRINSIC_##comp##_OS], 0, &actual); \
4084 CHECK_OS_COMPARISON(EQ
)
4085 CHECK_OS_COMPARISON(NE
)
4086 CHECK_OS_COMPARISON(GT
)
4087 CHECK_OS_COMPARISON(GE
)
4088 CHECK_OS_COMPARISON(LT
)
4089 CHECK_OS_COMPARISON(LE
)
4090 #undef CHECK_OS_COMPARISON
4093 sym
= gfc_search_interface (ns
->op
[i
], 0, &actual
);
4101 /* TODO: Do an ambiguity-check and error if multiple matching interfaces are
4102 found rather than just taking the first one and not checking further. */
4106 /* Don't use gfc_free_actual_arglist(). */
4107 free (actual
->next
);
4112 /* Change the expression node to a function call. */
4113 e
->expr_type
= EXPR_FUNCTION
;
4114 e
->symtree
= gfc_find_sym_in_symtree (sym
);
4115 e
->value
.function
.actual
= actual
;
4116 e
->value
.function
.esym
= NULL
;
4117 e
->value
.function
.isym
= NULL
;
4118 e
->value
.function
.name
= NULL
;
4119 e
->user_operator
= 1;
4121 if (!gfc_resolve_expr (e
))
4128 /* Tries to replace an assignment code node with a subroutine call to the
4129 subroutine associated with the assignment operator. Return true if the node
4130 was replaced. On false, no error is generated. */
4133 gfc_extend_assign (gfc_code
*c
, gfc_namespace
*ns
)
4135 gfc_actual_arglist
*actual
;
4136 gfc_expr
*lhs
, *rhs
, *tb_base
;
4137 gfc_symbol
*sym
= NULL
;
4138 const char *gname
= NULL
;
4139 gfc_typebound_proc
* tbo
;
4144 /* Don't allow an intrinsic assignment to be replaced. */
4145 if (lhs
->ts
.type
!= BT_DERIVED
&& lhs
->ts
.type
!= BT_CLASS
4146 && (rhs
->rank
== 0 || rhs
->rank
== lhs
->rank
)
4147 && (lhs
->ts
.type
== rhs
->ts
.type
4148 || (gfc_numeric_ts (&lhs
->ts
) && gfc_numeric_ts (&rhs
->ts
))))
4151 actual
= gfc_get_actual_arglist ();
4154 actual
->next
= gfc_get_actual_arglist ();
4155 actual
->next
->expr
= rhs
;
4157 /* TODO: Ambiguity-check, see above for gfc_extend_expr. */
4159 /* See if we find a matching type-bound assignment. */
4160 tbo
= matching_typebound_op (&tb_base
, actual
, INTRINSIC_ASSIGN
,
4165 /* Success: Replace the expression with a type-bound call. */
4166 gcc_assert (tb_base
);
4167 c
->expr1
= gfc_get_expr ();
4168 build_compcall_for_operator (c
->expr1
, actual
, tb_base
, tbo
, gname
);
4169 c
->expr1
->value
.compcall
.assign
= 1;
4170 c
->expr1
->where
= c
->loc
;
4172 c
->op
= EXEC_COMPCALL
;
4176 /* See if we find an 'ordinary' (non-typebound) assignment procedure. */
4177 for (; ns
; ns
= ns
->parent
)
4179 sym
= gfc_search_interface (ns
->op
[INTRINSIC_ASSIGN
], 1, &actual
);
4186 /* Success: Replace the assignment with the call. */
4187 c
->op
= EXEC_ASSIGN_CALL
;
4188 c
->symtree
= gfc_find_sym_in_symtree (sym
);
4191 c
->ext
.actual
= actual
;
4195 /* Failure: No assignment procedure found. */
4196 free (actual
->next
);
4202 /* Make sure that the interface just parsed is not already present in
4203 the given interface list. Ambiguity isn't checked yet since module
4204 procedures can be present without interfaces. */
4207 gfc_check_new_interface (gfc_interface
*base
, gfc_symbol
*new_sym
, locus loc
)
4211 for (ip
= base
; ip
; ip
= ip
->next
)
4213 if (ip
->sym
== new_sym
)
4215 gfc_error ("Entity %qs at %L is already present in the interface",
4216 new_sym
->name
, &loc
);
4225 /* Add a symbol to the current interface. */
4228 gfc_add_interface (gfc_symbol
*new_sym
)
4230 gfc_interface
**head
, *intr
;
4234 switch (current_interface
.type
)
4236 case INTERFACE_NAMELESS
:
4237 case INTERFACE_ABSTRACT
:
4240 case INTERFACE_INTRINSIC_OP
:
4241 for (ns
= current_interface
.ns
; ns
; ns
= ns
->parent
)
4242 switch (current_interface
.op
)
4245 case INTRINSIC_EQ_OS
:
4246 if (!gfc_check_new_interface (ns
->op
[INTRINSIC_EQ
], new_sym
,
4248 || !gfc_check_new_interface (ns
->op
[INTRINSIC_EQ_OS
],
4249 new_sym
, gfc_current_locus
))
4254 case INTRINSIC_NE_OS
:
4255 if (!gfc_check_new_interface (ns
->op
[INTRINSIC_NE
], new_sym
,
4257 || !gfc_check_new_interface (ns
->op
[INTRINSIC_NE_OS
],
4258 new_sym
, gfc_current_locus
))
4263 case INTRINSIC_GT_OS
:
4264 if (!gfc_check_new_interface (ns
->op
[INTRINSIC_GT
],
4265 new_sym
, gfc_current_locus
)
4266 || !gfc_check_new_interface (ns
->op
[INTRINSIC_GT_OS
],
4267 new_sym
, gfc_current_locus
))
4272 case INTRINSIC_GE_OS
:
4273 if (!gfc_check_new_interface (ns
->op
[INTRINSIC_GE
],
4274 new_sym
, gfc_current_locus
)
4275 || !gfc_check_new_interface (ns
->op
[INTRINSIC_GE_OS
],
4276 new_sym
, gfc_current_locus
))
4281 case INTRINSIC_LT_OS
:
4282 if (!gfc_check_new_interface (ns
->op
[INTRINSIC_LT
],
4283 new_sym
, gfc_current_locus
)
4284 || !gfc_check_new_interface (ns
->op
[INTRINSIC_LT_OS
],
4285 new_sym
, gfc_current_locus
))
4290 case INTRINSIC_LE_OS
:
4291 if (!gfc_check_new_interface (ns
->op
[INTRINSIC_LE
],
4292 new_sym
, gfc_current_locus
)
4293 || !gfc_check_new_interface (ns
->op
[INTRINSIC_LE_OS
],
4294 new_sym
, gfc_current_locus
))
4299 if (!gfc_check_new_interface (ns
->op
[current_interface
.op
],
4300 new_sym
, gfc_current_locus
))
4304 head
= ¤t_interface
.ns
->op
[current_interface
.op
];
4307 case INTERFACE_GENERIC
:
4308 case INTERFACE_DTIO
:
4309 for (ns
= current_interface
.ns
; ns
; ns
= ns
->parent
)
4311 gfc_find_symbol (current_interface
.sym
->name
, ns
, 0, &sym
);
4315 if (!gfc_check_new_interface (sym
->generic
,
4316 new_sym
, gfc_current_locus
))
4320 head
= ¤t_interface
.sym
->generic
;
4323 case INTERFACE_USER_OP
:
4324 if (!gfc_check_new_interface (current_interface
.uop
->op
,
4325 new_sym
, gfc_current_locus
))
4328 head
= ¤t_interface
.uop
->op
;
4332 gfc_internal_error ("gfc_add_interface(): Bad interface type");
4335 intr
= gfc_get_interface ();
4336 intr
->sym
= new_sym
;
4337 intr
->where
= gfc_current_locus
;
4347 gfc_current_interface_head (void)
4349 switch (current_interface
.type
)
4351 case INTERFACE_INTRINSIC_OP
:
4352 return current_interface
.ns
->op
[current_interface
.op
];
4354 case INTERFACE_GENERIC
:
4355 case INTERFACE_DTIO
:
4356 return current_interface
.sym
->generic
;
4358 case INTERFACE_USER_OP
:
4359 return current_interface
.uop
->op
;
4368 gfc_set_current_interface_head (gfc_interface
*i
)
4370 switch (current_interface
.type
)
4372 case INTERFACE_INTRINSIC_OP
:
4373 current_interface
.ns
->op
[current_interface
.op
] = i
;
4376 case INTERFACE_GENERIC
:
4377 case INTERFACE_DTIO
:
4378 current_interface
.sym
->generic
= i
;
4381 case INTERFACE_USER_OP
:
4382 current_interface
.uop
->op
= i
;
4391 /* Gets rid of a formal argument list. We do not free symbols.
4392 Symbols are freed when a namespace is freed. */
4395 gfc_free_formal_arglist (gfc_formal_arglist
*p
)
4397 gfc_formal_arglist
*q
;
4407 /* Check that it is ok for the type-bound procedure 'proc' to override the
4408 procedure 'old', cf. F08:4.5.7.3. */
4411 gfc_check_typebound_override (gfc_symtree
* proc
, gfc_symtree
* old
)
4414 gfc_symbol
*proc_target
, *old_target
;
4415 unsigned proc_pass_arg
, old_pass_arg
, argpos
;
4416 gfc_formal_arglist
*proc_formal
, *old_formal
;
4420 /* This procedure should only be called for non-GENERIC proc. */
4421 gcc_assert (!proc
->n
.tb
->is_generic
);
4423 /* If the overwritten procedure is GENERIC, this is an error. */
4424 if (old
->n
.tb
->is_generic
)
4426 gfc_error ("Can't overwrite GENERIC %qs at %L",
4427 old
->name
, &proc
->n
.tb
->where
);
4431 where
= proc
->n
.tb
->where
;
4432 proc_target
= proc
->n
.tb
->u
.specific
->n
.sym
;
4433 old_target
= old
->n
.tb
->u
.specific
->n
.sym
;
4435 /* Check that overridden binding is not NON_OVERRIDABLE. */
4436 if (old
->n
.tb
->non_overridable
)
4438 gfc_error ("%qs at %L overrides a procedure binding declared"
4439 " NON_OVERRIDABLE", proc
->name
, &where
);
4443 /* It's an error to override a non-DEFERRED procedure with a DEFERRED one. */
4444 if (!old
->n
.tb
->deferred
&& proc
->n
.tb
->deferred
)
4446 gfc_error ("%qs at %L must not be DEFERRED as it overrides a"
4447 " non-DEFERRED binding", proc
->name
, &where
);
4451 /* If the overridden binding is PURE, the overriding must be, too. */
4452 if (old_target
->attr
.pure
&& !proc_target
->attr
.pure
)
4454 gfc_error ("%qs at %L overrides a PURE procedure and must also be PURE",
4455 proc
->name
, &where
);
4459 /* If the overridden binding is ELEMENTAL, the overriding must be, too. If it
4460 is not, the overriding must not be either. */
4461 if (old_target
->attr
.elemental
&& !proc_target
->attr
.elemental
)
4463 gfc_error ("%qs at %L overrides an ELEMENTAL procedure and must also be"
4464 " ELEMENTAL", proc
->name
, &where
);
4467 if (!old_target
->attr
.elemental
&& proc_target
->attr
.elemental
)
4469 gfc_error ("%qs at %L overrides a non-ELEMENTAL procedure and must not"
4470 " be ELEMENTAL, either", proc
->name
, &where
);
4474 /* If the overridden binding is a SUBROUTINE, the overriding must also be a
4476 if (old_target
->attr
.subroutine
&& !proc_target
->attr
.subroutine
)
4478 gfc_error ("%qs at %L overrides a SUBROUTINE and must also be a"
4479 " SUBROUTINE", proc
->name
, &where
);
4483 /* If the overridden binding is a FUNCTION, the overriding must also be a
4484 FUNCTION and have the same characteristics. */
4485 if (old_target
->attr
.function
)
4487 if (!proc_target
->attr
.function
)
4489 gfc_error ("%qs at %L overrides a FUNCTION and must also be a"
4490 " FUNCTION", proc
->name
, &where
);
4494 if (!gfc_check_result_characteristics (proc_target
, old_target
,
4497 gfc_error ("Result mismatch for the overriding procedure "
4498 "%qs at %L: %s", proc
->name
, &where
, err
);
4503 /* If the overridden binding is PUBLIC, the overriding one must not be
4505 if (old
->n
.tb
->access
== ACCESS_PUBLIC
4506 && proc
->n
.tb
->access
== ACCESS_PRIVATE
)
4508 gfc_error ("%qs at %L overrides a PUBLIC procedure and must not be"
4509 " PRIVATE", proc
->name
, &where
);
4513 /* Compare the formal argument lists of both procedures. This is also abused
4514 to find the position of the passed-object dummy arguments of both
4515 bindings as at least the overridden one might not yet be resolved and we
4516 need those positions in the check below. */
4517 proc_pass_arg
= old_pass_arg
= 0;
4518 if (!proc
->n
.tb
->nopass
&& !proc
->n
.tb
->pass_arg
)
4520 if (!old
->n
.tb
->nopass
&& !old
->n
.tb
->pass_arg
)
4523 proc_formal
= gfc_sym_get_dummy_args (proc_target
);
4524 old_formal
= gfc_sym_get_dummy_args (old_target
);
4525 for ( ; proc_formal
&& old_formal
;
4526 proc_formal
= proc_formal
->next
, old_formal
= old_formal
->next
)
4528 if (proc
->n
.tb
->pass_arg
4529 && !strcmp (proc
->n
.tb
->pass_arg
, proc_formal
->sym
->name
))
4530 proc_pass_arg
= argpos
;
4531 if (old
->n
.tb
->pass_arg
4532 && !strcmp (old
->n
.tb
->pass_arg
, old_formal
->sym
->name
))
4533 old_pass_arg
= argpos
;
4535 /* Check that the names correspond. */
4536 if (strcmp (proc_formal
->sym
->name
, old_formal
->sym
->name
))
4538 gfc_error ("Dummy argument %qs of %qs at %L should be named %qs as"
4539 " to match the corresponding argument of the overridden"
4540 " procedure", proc_formal
->sym
->name
, proc
->name
, &where
,
4541 old_formal
->sym
->name
);
4545 check_type
= proc_pass_arg
!= argpos
&& old_pass_arg
!= argpos
;
4546 if (!gfc_check_dummy_characteristics (proc_formal
->sym
, old_formal
->sym
,
4547 check_type
, err
, sizeof(err
)))
4549 gfc_error_opt (OPT_Wargument_mismatch
,
4550 "Argument mismatch for the overriding procedure "
4551 "%qs at %L: %s", proc
->name
, &where
, err
);
4557 if (proc_formal
|| old_formal
)
4559 gfc_error ("%qs at %L must have the same number of formal arguments as"
4560 " the overridden procedure", proc
->name
, &where
);
4564 /* If the overridden binding is NOPASS, the overriding one must also be
4566 if (old
->n
.tb
->nopass
&& !proc
->n
.tb
->nopass
)
4568 gfc_error ("%qs at %L overrides a NOPASS binding and must also be"
4569 " NOPASS", proc
->name
, &where
);
4573 /* If the overridden binding is PASS(x), the overriding one must also be
4574 PASS and the passed-object dummy arguments must correspond. */
4575 if (!old
->n
.tb
->nopass
)
4577 if (proc
->n
.tb
->nopass
)
4579 gfc_error ("%qs at %L overrides a binding with PASS and must also be"
4580 " PASS", proc
->name
, &where
);
4584 if (proc_pass_arg
!= old_pass_arg
)
4586 gfc_error ("Passed-object dummy argument of %qs at %L must be at"
4587 " the same position as the passed-object dummy argument of"
4588 " the overridden procedure", proc
->name
, &where
);
4597 /* The following three functions check that the formal arguments
4598 of user defined derived type IO procedures are compliant with
4599 the requirements of the standard. */
4602 check_dtio_arg_TKR_intent (gfc_symbol
*fsym
, bool typebound
, bt type
,
4603 int kind
, int rank
, sym_intent intent
)
4605 if (fsym
->ts
.type
!= type
)
4607 gfc_error ("DTIO dummy argument at %L must be of type %s",
4608 &fsym
->declared_at
, gfc_basic_typename (type
));
4612 if (fsym
->ts
.type
!= BT_CLASS
&& fsym
->ts
.type
!= BT_DERIVED
4613 && fsym
->ts
.kind
!= kind
)
4614 gfc_error ("DTIO dummy argument at %L must be of KIND = %d",
4615 &fsym
->declared_at
, kind
);
4619 && (((type
== BT_CLASS
) && CLASS_DATA (fsym
)->attr
.dimension
)
4620 || ((type
!= BT_CLASS
) && fsym
->attr
.dimension
)))
4621 gfc_error ("DTIO dummy argument at %L must be a scalar",
4622 &fsym
->declared_at
);
4624 && (fsym
->as
== NULL
|| fsym
->as
->type
!= AS_ASSUMED_SHAPE
))
4625 gfc_error ("DTIO dummy argument at %L must be an "
4626 "ASSUMED SHAPE ARRAY", &fsym
->declared_at
);
4628 if (fsym
->attr
.intent
!= intent
)
4629 gfc_error ("DTIO dummy argument at %L must have INTENT %s",
4630 &fsym
->declared_at
, gfc_code2string (intents
, (int)intent
));
4636 check_dtio_interface1 (gfc_symbol
*derived
, gfc_symtree
*tb_io_st
,
4637 bool typebound
, bool formatted
, int code
)
4639 gfc_symbol
*dtio_sub
, *generic_proc
, *fsym
;
4640 gfc_typebound_proc
*tb_io_proc
, *specific_proc
;
4641 gfc_interface
*intr
;
4642 gfc_formal_arglist
*formal
;
4645 bool read
= ((dtio_codes
)code
== DTIO_RF
)
4646 || ((dtio_codes
)code
== DTIO_RUF
);
4654 /* Typebound DTIO binding. */
4655 tb_io_proc
= tb_io_st
->n
.tb
;
4656 if (tb_io_proc
== NULL
)
4659 gcc_assert (tb_io_proc
->is_generic
);
4660 gcc_assert (tb_io_proc
->u
.generic
->next
== NULL
);
4662 specific_proc
= tb_io_proc
->u
.generic
->specific
;
4663 if (specific_proc
== NULL
|| specific_proc
->is_generic
)
4666 dtio_sub
= specific_proc
->u
.specific
->n
.sym
;
4670 generic_proc
= tb_io_st
->n
.sym
;
4671 if (generic_proc
== NULL
|| generic_proc
->generic
== NULL
)
4674 for (intr
= tb_io_st
->n
.sym
->generic
; intr
; intr
= intr
->next
)
4676 if (intr
->sym
&& intr
->sym
->formal
&& intr
->sym
->formal
->sym
4677 && ((intr
->sym
->formal
->sym
->ts
.type
== BT_CLASS
4678 && CLASS_DATA (intr
->sym
->formal
->sym
)->ts
.u
.derived
4680 || (intr
->sym
->formal
->sym
->ts
.type
== BT_DERIVED
4681 && intr
->sym
->formal
->sym
->ts
.u
.derived
== derived
)))
4683 dtio_sub
= intr
->sym
;
4686 else if (intr
->sym
&& intr
->sym
->formal
&& !intr
->sym
->formal
->sym
)
4688 gfc_error ("Alternate return at %L is not permitted in a DTIO "
4689 "procedure", &intr
->sym
->declared_at
);
4694 if (dtio_sub
== NULL
)
4698 gcc_assert (dtio_sub
);
4699 if (!dtio_sub
->attr
.subroutine
)
4700 gfc_error ("DTIO procedure %qs at %L must be a subroutine",
4701 dtio_sub
->name
, &dtio_sub
->declared_at
);
4704 for (formal
= dtio_sub
->formal
; formal
; formal
= formal
->next
)
4707 if (arg_num
< (formatted
? 6 : 4))
4709 gfc_error ("Too few dummy arguments in DTIO procedure %qs at %L",
4710 dtio_sub
->name
, &dtio_sub
->declared_at
);
4714 if (arg_num
> (formatted
? 6 : 4))
4716 gfc_error ("Too many dummy arguments in DTIO procedure %qs at %L",
4717 dtio_sub
->name
, &dtio_sub
->declared_at
);
4722 /* Now go through the formal arglist. */
4724 for (formal
= dtio_sub
->formal
; formal
; formal
= formal
->next
, arg_num
++)
4726 if (!formatted
&& arg_num
== 3)
4732 gfc_error ("Alternate return at %L is not permitted in a DTIO "
4733 "procedure", &dtio_sub
->declared_at
);
4740 type
= derived
->attr
.sequence
|| derived
->attr
.is_bind_c
?
4741 BT_DERIVED
: BT_CLASS
;
4743 intent
= read
? INTENT_INOUT
: INTENT_IN
;
4744 check_dtio_arg_TKR_intent (fsym
, typebound
, type
, kind
,
4750 kind
= gfc_default_integer_kind
;
4752 check_dtio_arg_TKR_intent (fsym
, typebound
, type
, kind
,
4755 case(3): /* IOTYPE */
4756 type
= BT_CHARACTER
;
4757 kind
= gfc_default_character_kind
;
4759 check_dtio_arg_TKR_intent (fsym
, typebound
, type
, kind
,
4762 case(4): /* VLIST */
4764 kind
= gfc_default_integer_kind
;
4766 check_dtio_arg_TKR_intent (fsym
, typebound
, type
, kind
,
4769 case(5): /* IOSTAT */
4771 kind
= gfc_default_integer_kind
;
4772 intent
= INTENT_OUT
;
4773 check_dtio_arg_TKR_intent (fsym
, typebound
, type
, kind
,
4776 case(6): /* IOMSG */
4777 type
= BT_CHARACTER
;
4778 kind
= gfc_default_character_kind
;
4779 intent
= INTENT_INOUT
;
4780 check_dtio_arg_TKR_intent (fsym
, typebound
, type
, kind
,
4787 derived
->attr
.has_dtio_procs
= 1;
4792 gfc_check_dtio_interfaces (gfc_symbol
*derived
)
4794 gfc_symtree
*tb_io_st
;
4799 if (derived
->attr
.is_class
== 1 || derived
->attr
.vtype
== 1)
4802 /* Check typebound DTIO bindings. */
4803 for (code
= 0; code
< 4; code
++)
4805 formatted
= ((dtio_codes
)code
== DTIO_RF
)
4806 || ((dtio_codes
)code
== DTIO_WF
);
4808 tb_io_st
= gfc_find_typebound_proc (derived
, &t
,
4809 gfc_code2string (dtio_procs
, code
),
4810 true, &derived
->declared_at
);
4811 if (tb_io_st
!= NULL
)
4812 check_dtio_interface1 (derived
, tb_io_st
, true, formatted
, code
);
4815 /* Check generic DTIO interfaces. */
4816 for (code
= 0; code
< 4; code
++)
4818 formatted
= ((dtio_codes
)code
== DTIO_RF
)
4819 || ((dtio_codes
)code
== DTIO_WF
);
4821 tb_io_st
= gfc_find_symtree (derived
->ns
->sym_root
,
4822 gfc_code2string (dtio_procs
, code
));
4823 if (tb_io_st
!= NULL
)
4824 check_dtio_interface1 (derived
, tb_io_st
, false, formatted
, code
);
4830 gfc_find_typebound_dtio_proc (gfc_symbol
*derived
, bool write
, bool formatted
)
4832 gfc_symtree
*tb_io_st
= NULL
;
4835 if (!derived
|| !derived
->resolved
|| derived
->attr
.flavor
!= FL_DERIVED
)
4838 /* Try to find a typebound DTIO binding. */
4839 if (formatted
== true)
4842 tb_io_st
= gfc_find_typebound_proc (derived
, &t
,
4843 gfc_code2string (dtio_procs
,
4846 &derived
->declared_at
);
4848 tb_io_st
= gfc_find_typebound_proc (derived
, &t
,
4849 gfc_code2string (dtio_procs
,
4852 &derived
->declared_at
);
4857 tb_io_st
= gfc_find_typebound_proc (derived
, &t
,
4858 gfc_code2string (dtio_procs
,
4861 &derived
->declared_at
);
4863 tb_io_st
= gfc_find_typebound_proc (derived
, &t
,
4864 gfc_code2string (dtio_procs
,
4867 &derived
->declared_at
);
4874 gfc_find_specific_dtio_proc (gfc_symbol
*derived
, bool write
, bool formatted
)
4876 gfc_symtree
*tb_io_st
= NULL
;
4877 gfc_symbol
*dtio_sub
= NULL
;
4878 gfc_symbol
*extended
;
4879 gfc_typebound_proc
*tb_io_proc
, *specific_proc
;
4881 tb_io_st
= gfc_find_typebound_dtio_proc (derived
, write
, formatted
);
4883 if (tb_io_st
!= NULL
)
4885 const char *genname
;
4888 tb_io_proc
= tb_io_st
->n
.tb
;
4889 gcc_assert (tb_io_proc
!= NULL
);
4890 gcc_assert (tb_io_proc
->is_generic
);
4891 gcc_assert (tb_io_proc
->u
.generic
->next
== NULL
);
4893 specific_proc
= tb_io_proc
->u
.generic
->specific
;
4894 gcc_assert (!specific_proc
->is_generic
);
4896 /* Go back and make sure that we have the right specific procedure.
4897 Here we most likely have a procedure from the parent type, which
4898 can be overridden in extensions. */
4899 genname
= tb_io_proc
->u
.generic
->specific_st
->name
;
4900 st
= gfc_find_typebound_proc (derived
, NULL
, genname
,
4901 true, &tb_io_proc
->where
);
4903 dtio_sub
= st
->n
.tb
->u
.specific
->n
.sym
;
4905 dtio_sub
= specific_proc
->u
.specific
->n
.sym
;
4910 /* If there is not a typebound binding, look for a generic
4912 for (extended
= derived
; extended
;
4913 extended
= gfc_get_derived_super_type (extended
))
4915 if (extended
== NULL
|| extended
->ns
== NULL
4916 || extended
->attr
.flavor
== FL_UNKNOWN
)
4919 if (formatted
== true)
4922 tb_io_st
= gfc_find_symtree (extended
->ns
->sym_root
,
4923 gfc_code2string (dtio_procs
,
4926 tb_io_st
= gfc_find_symtree (extended
->ns
->sym_root
,
4927 gfc_code2string (dtio_procs
,
4933 tb_io_st
= gfc_find_symtree (extended
->ns
->sym_root
,
4934 gfc_code2string (dtio_procs
,
4937 tb_io_st
= gfc_find_symtree (extended
->ns
->sym_root
,
4938 gfc_code2string (dtio_procs
,
4942 if (tb_io_st
!= NULL
4944 && tb_io_st
->n
.sym
->generic
)
4946 for (gfc_interface
*intr
= tb_io_st
->n
.sym
->generic
;
4947 intr
&& intr
->sym
; intr
= intr
->next
)
4949 if (intr
->sym
->formal
)
4951 gfc_symbol
*fsym
= intr
->sym
->formal
->sym
;
4952 if ((fsym
->ts
.type
== BT_CLASS
4953 && CLASS_DATA (fsym
)->ts
.u
.derived
== extended
)
4954 || (fsym
->ts
.type
== BT_DERIVED
4955 && fsym
->ts
.u
.derived
== extended
))
4957 dtio_sub
= intr
->sym
;
4966 if (dtio_sub
&& derived
!= CLASS_DATA (dtio_sub
->formal
->sym
)->ts
.u
.derived
)
4967 gfc_find_derived_vtab (derived
);