1 /* Declaration statement matcher
2 Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008, 2009
3 Free Software Foundation, Inc.
4 Contributed by Andy Vaught
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
30 /* Macros to access allocate memory for gfc_data_variable,
31 gfc_data_value and gfc_data. */
32 #define gfc_get_data_variable() XCNEW (gfc_data_variable)
33 #define gfc_get_data_value() XCNEW (gfc_data_value)
34 #define gfc_get_data() XCNEW (gfc_data)
37 /* This flag is set if an old-style length selector is matched
38 during a type-declaration statement. */
40 static int old_char_selector;
42 /* When variables acquire types and attributes from a declaration
43 statement, they get them from the following static variables. The
44 first part of a declaration sets these variables and the second
45 part copies these into symbol structures. */
47 static gfc_typespec current_ts;
49 static symbol_attribute current_attr;
50 static gfc_array_spec *current_as;
51 static int colon_seen;
53 /* The current binding label (if any). */
54 static char curr_binding_label[GFC_MAX_BINDING_LABEL_LEN + 1];
55 /* Need to know how many identifiers are on the current data declaration
56 line in case we're given the BIND(C) attribute with a NAME= specifier. */
57 static int num_idents_on_line;
58 /* Need to know if a NAME= specifier was found during gfc_match_bind_c so we
59 can supply a name if the curr_binding_label is nil and NAME= was not. */
60 static int has_name_equals = 0;
62 /* Initializer of the previous enumerator. */
64 static gfc_expr *last_initializer;
66 /* History of all the enumerators is maintained, so that
67 kind values of all the enumerators could be updated depending
68 upon the maximum initialized value. */
70 typedef struct enumerator_history
73 gfc_expr *initializer;
74 struct enumerator_history *next;
78 /* Header of enum history chain. */
80 static enumerator_history *enum_history = NULL;
82 /* Pointer of enum history node containing largest initializer. */
84 static enumerator_history *max_enum = NULL;
86 /* gfc_new_block points to the symbol of a newly matched block. */
88 gfc_symbol *gfc_new_block;
90 bool gfc_matching_function;
93 /********************* DATA statement subroutines *********************/
95 static bool in_match_data = false;
98 gfc_in_match_data (void)
100 return in_match_data;
104 set_in_match_data (bool set_value)
106 in_match_data = set_value;
109 /* Free a gfc_data_variable structure and everything beneath it. */
112 free_variable (gfc_data_variable *p)
114 gfc_data_variable *q;
119 gfc_free_expr (p->expr);
120 gfc_free_iterator (&p->iter, 0);
121 free_variable (p->list);
127 /* Free a gfc_data_value structure and everything beneath it. */
130 free_value (gfc_data_value *p)
137 gfc_free_expr (p->expr);
143 /* Free a list of gfc_data structures. */
146 gfc_free_data (gfc_data *p)
153 free_variable (p->var);
154 free_value (p->value);
160 /* Free all data in a namespace. */
163 gfc_free_data_all (gfc_namespace *ns)
176 static match var_element (gfc_data_variable *);
178 /* Match a list of variables terminated by an iterator and a right
182 var_list (gfc_data_variable *parent)
184 gfc_data_variable *tail, var;
187 m = var_element (&var);
188 if (m == MATCH_ERROR)
193 tail = gfc_get_data_variable ();
200 if (gfc_match_char (',') != MATCH_YES)
203 m = gfc_match_iterator (&parent->iter, 1);
206 if (m == MATCH_ERROR)
209 m = var_element (&var);
210 if (m == MATCH_ERROR)
215 tail->next = gfc_get_data_variable ();
221 if (gfc_match_char (')') != MATCH_YES)
226 gfc_syntax_error (ST_DATA);
231 /* Match a single element in a data variable list, which can be a
232 variable-iterator list. */
235 var_element (gfc_data_variable *new_var)
240 memset (new_var, 0, sizeof (gfc_data_variable));
242 if (gfc_match_char ('(') == MATCH_YES)
243 return var_list (new_var);
245 m = gfc_match_variable (&new_var->expr, 0);
249 sym = new_var->expr->symtree->n.sym;
251 /* Symbol should already have an associated type. */
252 if (gfc_check_symbol_typed (sym, gfc_current_ns,
253 false, gfc_current_locus) == FAILURE)
256 if (!sym->attr.function && gfc_current_ns->parent
257 && gfc_current_ns->parent == sym->ns)
259 gfc_error ("Host associated variable '%s' may not be in the DATA "
260 "statement at %C", sym->name);
264 if (gfc_current_state () != COMP_BLOCK_DATA
265 && sym->attr.in_common
266 && gfc_notify_std (GFC_STD_GNU, "Extension: initialization of "
267 "common block variable '%s' in DATA statement at %C",
268 sym->name) == FAILURE)
271 if (gfc_add_data (&sym->attr, sym->name, &new_var->expr->where) == FAILURE)
278 /* Match the top-level list of data variables. */
281 top_var_list (gfc_data *d)
283 gfc_data_variable var, *tail, *new_var;
290 m = var_element (&var);
293 if (m == MATCH_ERROR)
296 new_var = gfc_get_data_variable ();
302 tail->next = new_var;
306 if (gfc_match_char ('/') == MATCH_YES)
308 if (gfc_match_char (',') != MATCH_YES)
315 gfc_syntax_error (ST_DATA);
316 gfc_free_data_all (gfc_current_ns);
322 match_data_constant (gfc_expr **result)
324 char name[GFC_MAX_SYMBOL_LEN + 1];
330 m = gfc_match_literal_constant (&expr, 1);
337 if (m == MATCH_ERROR)
340 m = gfc_match_null (result);
344 old_loc = gfc_current_locus;
346 /* Should this be a structure component, try to match it
347 before matching a name. */
348 m = gfc_match_rvalue (result);
349 if (m == MATCH_ERROR)
352 if (m == MATCH_YES && (*result)->expr_type == EXPR_STRUCTURE)
354 if (gfc_simplify_expr (*result, 0) == FAILURE)
359 gfc_current_locus = old_loc;
361 m = gfc_match_name (name);
365 if (gfc_find_symbol (name, NULL, 1, &sym))
369 || (sym->attr.flavor != FL_PARAMETER && sym->attr.flavor != FL_DERIVED))
371 gfc_error ("Symbol '%s' must be a PARAMETER in DATA statement at %C",
375 else if (sym->attr.flavor == FL_DERIVED)
376 return gfc_match_structure_constructor (sym, result, false);
378 /* Check to see if the value is an initialization array expression. */
379 if (sym->value->expr_type == EXPR_ARRAY)
381 gfc_current_locus = old_loc;
383 m = gfc_match_init_expr (result);
384 if (m == MATCH_ERROR)
389 if (gfc_simplify_expr (*result, 0) == FAILURE)
392 if ((*result)->expr_type == EXPR_CONSTANT)
396 gfc_error ("Invalid initializer %s in Data statement at %C", name);
402 *result = gfc_copy_expr (sym->value);
407 /* Match a list of values in a DATA statement. The leading '/' has
408 already been seen at this point. */
411 top_val_list (gfc_data *data)
413 gfc_data_value *new_val, *tail;
421 m = match_data_constant (&expr);
424 if (m == MATCH_ERROR)
427 new_val = gfc_get_data_value ();
428 mpz_init (new_val->repeat);
431 data->value = new_val;
433 tail->next = new_val;
437 if (expr->ts.type != BT_INTEGER || gfc_match_char ('*') != MATCH_YES)
440 mpz_set_ui (tail->repeat, 1);
444 if (expr->ts.type == BT_INTEGER)
445 mpz_set (tail->repeat, expr->value.integer);
446 gfc_free_expr (expr);
448 m = match_data_constant (&tail->expr);
451 if (m == MATCH_ERROR)
455 if (gfc_match_char ('/') == MATCH_YES)
457 if (gfc_match_char (',') == MATCH_NO)
464 gfc_syntax_error (ST_DATA);
465 gfc_free_data_all (gfc_current_ns);
470 /* Matches an old style initialization. */
473 match_old_style_init (const char *name)
480 /* Set up data structure to hold initializers. */
481 gfc_find_sym_tree (name, NULL, 0, &st);
484 newdata = gfc_get_data ();
485 newdata->var = gfc_get_data_variable ();
486 newdata->var->expr = gfc_get_variable_expr (st);
487 newdata->where = gfc_current_locus;
489 /* Match initial value list. This also eats the terminal '/'. */
490 m = top_val_list (newdata);
499 gfc_error ("Initialization at %C is not allowed in a PURE procedure");
504 /* Mark the variable as having appeared in a data statement. */
505 if (gfc_add_data (&sym->attr, sym->name, &sym->declared_at) == FAILURE)
511 /* Chain in namespace list of DATA initializers. */
512 newdata->next = gfc_current_ns->data;
513 gfc_current_ns->data = newdata;
519 /* Match the stuff following a DATA statement. If ERROR_FLAG is set,
520 we are matching a DATA statement and are therefore issuing an error
521 if we encounter something unexpected, if not, we're trying to match
522 an old-style initialization expression of the form INTEGER I /2/. */
525 gfc_match_data (void)
530 set_in_match_data (true);
534 new_data = gfc_get_data ();
535 new_data->where = gfc_current_locus;
537 m = top_var_list (new_data);
541 m = top_val_list (new_data);
545 new_data->next = gfc_current_ns->data;
546 gfc_current_ns->data = new_data;
548 if (gfc_match_eos () == MATCH_YES)
551 gfc_match_char (','); /* Optional comma */
554 set_in_match_data (false);
558 gfc_error ("DATA statement at %C is not allowed in a PURE procedure");
565 set_in_match_data (false);
566 gfc_free_data (new_data);
571 /************************ Declaration statements *********************/
573 /* Match an intent specification. Since this can only happen after an
574 INTENT word, a legal intent-spec must follow. */
577 match_intent_spec (void)
580 if (gfc_match (" ( in out )") == MATCH_YES)
582 if (gfc_match (" ( in )") == MATCH_YES)
584 if (gfc_match (" ( out )") == MATCH_YES)
587 gfc_error ("Bad INTENT specification at %C");
588 return INTENT_UNKNOWN;
592 /* Matches a character length specification, which is either a
593 specification expression or a '*'. */
596 char_len_param_value (gfc_expr **expr)
600 if (gfc_match_char ('*') == MATCH_YES)
606 m = gfc_match_expr (expr);
609 && gfc_expr_check_typed (*expr, gfc_current_ns, false) == FAILURE)
612 if (m == MATCH_YES && (*expr)->expr_type == EXPR_FUNCTION)
614 if ((*expr)->value.function.actual
615 && (*expr)->value.function.actual->expr->symtree)
618 e = (*expr)->value.function.actual->expr;
619 if (e->symtree->n.sym->attr.flavor == FL_PROCEDURE
620 && e->expr_type == EXPR_VARIABLE)
622 if (e->symtree->n.sym->ts.type == BT_UNKNOWN)
624 if (e->symtree->n.sym->ts.type == BT_CHARACTER
625 && e->symtree->n.sym->ts.cl
626 && e->symtree->n.sym->ts.cl->length->ts.type == BT_UNKNOWN)
634 gfc_error ("Conflict in attributes of function argument at %C");
639 /* A character length is a '*' followed by a literal integer or a
640 char_len_param_value in parenthesis. */
643 match_char_length (gfc_expr **expr)
648 m = gfc_match_char ('*');
652 m = gfc_match_small_literal_int (&length, NULL);
653 if (m == MATCH_ERROR)
658 if (gfc_notify_std (GFC_STD_F95_OBS, "Obsolescent feature: "
659 "Old-style character length at %C") == FAILURE)
661 *expr = gfc_int_expr (length);
665 if (gfc_match_char ('(') == MATCH_NO)
668 m = char_len_param_value (expr);
669 if (m != MATCH_YES && gfc_matching_function)
675 if (m == MATCH_ERROR)
680 if (gfc_match_char (')') == MATCH_NO)
682 gfc_free_expr (*expr);
690 gfc_error ("Syntax error in character length specification at %C");
695 /* Special subroutine for finding a symbol. Check if the name is found
696 in the current name space. If not, and we're compiling a function or
697 subroutine and the parent compilation unit is an interface, then check
698 to see if the name we've been given is the name of the interface
699 (located in another namespace). */
702 find_special (const char *name, gfc_symbol **result, bool allow_subroutine)
708 i = gfc_get_sym_tree (name, NULL, &st, allow_subroutine);
711 *result = st ? st->n.sym : NULL;
715 if (gfc_current_state () != COMP_SUBROUTINE
716 && gfc_current_state () != COMP_FUNCTION)
719 s = gfc_state_stack->previous;
723 if (s->state != COMP_INTERFACE)
726 goto end; /* Nameless interface. */
728 if (strcmp (name, s->sym->name) == 0)
739 /* Special subroutine for getting a symbol node associated with a
740 procedure name, used in SUBROUTINE and FUNCTION statements. The
741 symbol is created in the parent using with symtree node in the
742 child unit pointing to the symbol. If the current namespace has no
743 parent, then the symbol is just created in the current unit. */
746 get_proc_name (const char *name, gfc_symbol **result, bool module_fcn_entry)
752 /* Module functions have to be left in their own namespace because
753 they have potentially (almost certainly!) already been referenced.
754 In this sense, they are rather like external functions. This is
755 fixed up in resolve.c(resolve_entries), where the symbol name-
756 space is set to point to the master function, so that the fake
757 result mechanism can work. */
758 if (module_fcn_entry)
760 /* Present if entry is declared to be a module procedure. */
761 rc = gfc_find_symbol (name, gfc_current_ns->parent, 0, result);
764 rc = gfc_get_symbol (name, NULL, result);
765 else if (!gfc_get_symbol (name, NULL, &sym) && sym
766 && (*result)->ts.type == BT_UNKNOWN
767 && sym->attr.flavor == FL_UNKNOWN)
768 /* Pick up the typespec for the entry, if declared in the function
769 body. Note that this symbol is FL_UNKNOWN because it will
770 only have appeared in a type declaration. The local symtree
771 is set to point to the module symbol and a unique symtree
772 to the local version. This latter ensures a correct clearing
775 /* If the ENTRY proceeds its specification, we need to ensure
776 that this does not raise a "has no IMPLICIT type" error. */
777 if (sym->ts.type == BT_UNKNOWN)
778 sym->attr.untyped = 1;
780 (*result)->ts = sym->ts;
782 /* Put the symbol in the procedure namespace so that, should
783 the ENTRY precede its specification, the specification
785 (*result)->ns = gfc_current_ns;
787 gfc_find_sym_tree (name, gfc_current_ns, 0, &st);
789 st = gfc_get_unique_symtree (gfc_current_ns);
794 rc = gfc_get_symbol (name, gfc_current_ns->parent, result);
800 gfc_current_ns->refs++;
802 if (sym && !sym->gfc_new && gfc_current_state () != COMP_INTERFACE)
804 /* Trap another encompassed procedure with the same name. All
805 these conditions are necessary to avoid picking up an entry
806 whose name clashes with that of the encompassing procedure;
807 this is handled using gsymbols to register unique,globally
809 if (sym->attr.flavor != 0
810 && sym->attr.proc != 0
811 && (sym->attr.subroutine || sym->attr.function)
812 && sym->attr.if_source != IFSRC_UNKNOWN)
813 gfc_error_now ("Procedure '%s' at %C is already defined at %L",
814 name, &sym->declared_at);
816 /* Trap a procedure with a name the same as interface in the
817 encompassing scope. */
818 if (sym->attr.generic != 0
819 && (sym->attr.subroutine || sym->attr.function)
820 && !sym->attr.mod_proc)
821 gfc_error_now ("Name '%s' at %C is already defined"
822 " as a generic interface at %L",
823 name, &sym->declared_at);
825 /* Trap declarations of attributes in encompassing scope. The
826 signature for this is that ts.kind is set. Legitimate
827 references only set ts.type. */
828 if (sym->ts.kind != 0
829 && !sym->attr.implicit_type
830 && sym->attr.proc == 0
831 && gfc_current_ns->parent != NULL
832 && sym->attr.access == 0
833 && !module_fcn_entry)
834 gfc_error_now ("Procedure '%s' at %C has an explicit interface "
835 "and must not have attributes declared at %L",
836 name, &sym->declared_at);
839 if (gfc_current_ns->parent == NULL || *result == NULL)
842 /* Module function entries will already have a symtree in
843 the current namespace but will need one at module level. */
844 if (module_fcn_entry)
846 /* Present if entry is declared to be a module procedure. */
847 rc = gfc_find_sym_tree (name, gfc_current_ns->parent, 0, &st);
849 st = gfc_new_symtree (&gfc_current_ns->parent->sym_root, name);
852 st = gfc_new_symtree (&gfc_current_ns->sym_root, name);
857 /* See if the procedure should be a module procedure. */
859 if (((sym->ns->proc_name != NULL
860 && sym->ns->proc_name->attr.flavor == FL_MODULE
861 && sym->attr.proc != PROC_MODULE)
862 || (module_fcn_entry && sym->attr.proc != PROC_MODULE))
863 && gfc_add_procedure (&sym->attr, PROC_MODULE,
864 sym->name, NULL) == FAILURE)
871 /* Verify that the given symbol representing a parameter is C
872 interoperable, by checking to see if it was marked as such after
873 its declaration. If the given symbol is not interoperable, a
874 warning is reported, thus removing the need to return the status to
875 the calling function. The standard does not require the user use
876 one of the iso_c_binding named constants to declare an
877 interoperable parameter, but we can't be sure if the param is C
878 interop or not if the user doesn't. For example, integer(4) may be
879 legal Fortran, but doesn't have meaning in C. It may interop with
880 a number of the C types, which causes a problem because the
881 compiler can't know which one. This code is almost certainly not
882 portable, and the user will get what they deserve if the C type
883 across platforms isn't always interoperable with integer(4). If
884 the user had used something like integer(c_int) or integer(c_long),
885 the compiler could have automatically handled the varying sizes
889 verify_c_interop_param (gfc_symbol *sym)
891 int is_c_interop = 0;
892 gfc_try retval = SUCCESS;
894 /* We check implicitly typed variables in symbol.c:gfc_set_default_type().
895 Don't repeat the checks here. */
896 if (sym->attr.implicit_type)
899 /* For subroutines or functions that are passed to a BIND(C) procedure,
900 they're interoperable if they're BIND(C) and their params are all
902 if (sym->attr.flavor == FL_PROCEDURE)
904 if (sym->attr.is_bind_c == 0)
906 gfc_error_now ("Procedure '%s' at %L must have the BIND(C) "
907 "attribute to be C interoperable", sym->name,
908 &(sym->declared_at));
914 if (sym->attr.is_c_interop == 1)
915 /* We've already checked this procedure; don't check it again. */
918 return verify_bind_c_sym (sym, &(sym->ts), sym->attr.in_common,
923 /* See if we've stored a reference to a procedure that owns sym. */
924 if (sym->ns != NULL && sym->ns->proc_name != NULL)
926 if (sym->ns->proc_name->attr.is_bind_c == 1)
929 (verify_c_interop (&(sym->ts))
932 if (is_c_interop != 1)
934 /* Make personalized messages to give better feedback. */
935 if (sym->ts.type == BT_DERIVED)
936 gfc_error ("Type '%s' at %L is a parameter to the BIND(C) "
937 " procedure '%s' but is not C interoperable "
938 "because derived type '%s' is not C interoperable",
939 sym->name, &(sym->declared_at),
940 sym->ns->proc_name->name,
941 sym->ts.derived->name);
943 gfc_warning ("Variable '%s' at %L is a parameter to the "
944 "BIND(C) procedure '%s' but may not be C "
946 sym->name, &(sym->declared_at),
947 sym->ns->proc_name->name);
950 /* Character strings are only C interoperable if they have a
952 if (sym->ts.type == BT_CHARACTER)
954 gfc_charlen *cl = sym->ts.cl;
955 if (!cl || !cl->length || cl->length->expr_type != EXPR_CONSTANT
956 || mpz_cmp_si (cl->length->value.integer, 1) != 0)
958 gfc_error ("Character argument '%s' at %L "
959 "must be length 1 because "
960 "procedure '%s' is BIND(C)",
961 sym->name, &sym->declared_at,
962 sym->ns->proc_name->name);
967 /* We have to make sure that any param to a bind(c) routine does
968 not have the allocatable, pointer, or optional attributes,
969 according to J3/04-007, section 5.1. */
970 if (sym->attr.allocatable == 1)
972 gfc_error ("Variable '%s' at %L cannot have the "
973 "ALLOCATABLE attribute because procedure '%s'"
974 " is BIND(C)", sym->name, &(sym->declared_at),
975 sym->ns->proc_name->name);
979 if (sym->attr.pointer == 1)
981 gfc_error ("Variable '%s' at %L cannot have the "
982 "POINTER attribute because procedure '%s'"
983 " is BIND(C)", sym->name, &(sym->declared_at),
984 sym->ns->proc_name->name);
988 if (sym->attr.optional == 1)
990 gfc_error ("Variable '%s' at %L cannot have the "
991 "OPTIONAL attribute because procedure '%s'"
992 " is BIND(C)", sym->name, &(sym->declared_at),
993 sym->ns->proc_name->name);
997 /* Make sure that if it has the dimension attribute, that it is
998 either assumed size or explicit shape. */
1001 if (sym->as->type == AS_ASSUMED_SHAPE)
1003 gfc_error ("Assumed-shape array '%s' at %L cannot be an "
1004 "argument to the procedure '%s' at %L because "
1005 "the procedure is BIND(C)", sym->name,
1006 &(sym->declared_at), sym->ns->proc_name->name,
1007 &(sym->ns->proc_name->declared_at));
1011 if (sym->as->type == AS_DEFERRED)
1013 gfc_error ("Deferred-shape array '%s' at %L cannot be an "
1014 "argument to the procedure '%s' at %L because "
1015 "the procedure is BIND(C)", sym->name,
1016 &(sym->declared_at), sym->ns->proc_name->name,
1017 &(sym->ns->proc_name->declared_at));
1028 /* Function called by variable_decl() that adds a name to the symbol table. */
1031 build_sym (const char *name, gfc_charlen *cl,
1032 gfc_array_spec **as, locus *var_locus)
1034 symbol_attribute attr;
1037 if (gfc_get_symbol (name, NULL, &sym))
1040 /* Start updating the symbol table. Add basic type attribute if present. */
1041 if (current_ts.type != BT_UNKNOWN
1042 && (sym->attr.implicit_type == 0
1043 || !gfc_compare_types (&sym->ts, ¤t_ts))
1044 && gfc_add_type (sym, ¤t_ts, var_locus) == FAILURE)
1047 if (sym->ts.type == BT_CHARACTER)
1050 /* Add dimension attribute if present. */
1051 if (gfc_set_array_spec (sym, *as, var_locus) == FAILURE)
1055 /* Add attribute to symbol. The copy is so that we can reset the
1056 dimension attribute. */
1057 attr = current_attr;
1060 if (gfc_copy_attr (&sym->attr, &attr, var_locus) == FAILURE)
1063 /* Finish any work that may need to be done for the binding label,
1064 if it's a bind(c). The bind(c) attr is found before the symbol
1065 is made, and before the symbol name (for data decls), so the
1066 current_ts is holding the binding label, or nothing if the
1067 name= attr wasn't given. Therefore, test here if we're dealing
1068 with a bind(c) and make sure the binding label is set correctly. */
1069 if (sym->attr.is_bind_c == 1)
1071 if (sym->binding_label[0] == '\0')
1073 /* Set the binding label and verify that if a NAME= was specified
1074 then only one identifier was in the entity-decl-list. */
1075 if (set_binding_label (sym->binding_label, sym->name,
1076 num_idents_on_line) == FAILURE)
1081 /* See if we know we're in a common block, and if it's a bind(c)
1082 common then we need to make sure we're an interoperable type. */
1083 if (sym->attr.in_common == 1)
1085 /* Test the common block object. */
1086 if (sym->common_block != NULL && sym->common_block->is_bind_c == 1
1087 && sym->ts.is_c_interop != 1)
1089 gfc_error_now ("Variable '%s' in common block '%s' at %C "
1090 "must be declared with a C interoperable "
1091 "kind since common block '%s' is BIND(C)",
1092 sym->name, sym->common_block->name,
1093 sym->common_block->name);
1098 sym->attr.implied_index = 0;
1104 /* Set character constant to the given length. The constant will be padded or
1105 truncated. If we're inside an array constructor without a typespec, we
1106 additionally check that all elements have the same length; check_len -1
1107 means no checking. */
1110 gfc_set_constant_character_len (int len, gfc_expr *expr, int check_len)
1115 gcc_assert (expr->expr_type == EXPR_CONSTANT);
1116 gcc_assert (expr->ts.type == BT_CHARACTER);
1118 slen = expr->value.character.length;
1121 s = gfc_get_wide_string (len + 1);
1122 memcpy (s, expr->value.character.string,
1123 MIN (len, slen) * sizeof (gfc_char_t));
1125 gfc_wide_memset (&s[slen], ' ', len - slen);
1127 if (gfc_option.warn_character_truncation && slen > len)
1128 gfc_warning_now ("CHARACTER expression at %L is being truncated "
1129 "(%d/%d)", &expr->where, slen, len);
1131 /* Apply the standard by 'hand' otherwise it gets cleared for
1133 if (check_len != -1 && slen != check_len
1134 && !(gfc_option.allow_std & GFC_STD_GNU))
1135 gfc_error_now ("The CHARACTER elements of the array constructor "
1136 "at %L must have the same length (%d/%d)",
1137 &expr->where, slen, check_len);
1140 gfc_free (expr->value.character.string);
1141 expr->value.character.string = s;
1142 expr->value.character.length = len;
1147 /* Function to create and update the enumerator history
1148 using the information passed as arguments.
1149 Pointer "max_enum" is also updated, to point to
1150 enum history node containing largest initializer.
1152 SYM points to the symbol node of enumerator.
1153 INIT points to its enumerator value. */
1156 create_enum_history (gfc_symbol *sym, gfc_expr *init)
1158 enumerator_history *new_enum_history;
1159 gcc_assert (sym != NULL && init != NULL);
1161 new_enum_history = XCNEW (enumerator_history);
1163 new_enum_history->sym = sym;
1164 new_enum_history->initializer = init;
1165 new_enum_history->next = NULL;
1167 if (enum_history == NULL)
1169 enum_history = new_enum_history;
1170 max_enum = enum_history;
1174 new_enum_history->next = enum_history;
1175 enum_history = new_enum_history;
1177 if (mpz_cmp (max_enum->initializer->value.integer,
1178 new_enum_history->initializer->value.integer) < 0)
1179 max_enum = new_enum_history;
1184 /* Function to free enum kind history. */
1187 gfc_free_enum_history (void)
1189 enumerator_history *current = enum_history;
1190 enumerator_history *next;
1192 while (current != NULL)
1194 next = current->next;
1199 enum_history = NULL;
1203 /* Function called by variable_decl() that adds an initialization
1204 expression to a symbol. */
1207 add_init_expr_to_sym (const char *name, gfc_expr **initp, locus *var_locus)
1209 symbol_attribute attr;
1214 if (find_special (name, &sym, false))
1219 /* If this symbol is confirming an implicit parameter type,
1220 then an initialization expression is not allowed. */
1221 if (attr.flavor == FL_PARAMETER
1222 && sym->value != NULL
1225 gfc_error ("Initializer not allowed for PARAMETER '%s' at %C",
1232 /* An initializer is required for PARAMETER declarations. */
1233 if (attr.flavor == FL_PARAMETER)
1235 gfc_error ("PARAMETER at %L is missing an initializer", var_locus);
1241 /* If a variable appears in a DATA block, it cannot have an
1245 gfc_error ("Variable '%s' at %C with an initializer already "
1246 "appears in a DATA statement", sym->name);
1250 /* Check if the assignment can happen. This has to be put off
1251 until later for a derived type variable. */
1252 if (sym->ts.type != BT_DERIVED && init->ts.type != BT_DERIVED
1253 && gfc_check_assign_symbol (sym, init) == FAILURE)
1256 if (sym->ts.type == BT_CHARACTER && sym->ts.cl)
1258 /* Update symbol character length according initializer. */
1259 if (sym->ts.cl->length == NULL)
1262 /* If there are multiple CHARACTER variables declared on the
1263 same line, we don't want them to share the same length. */
1264 sym->ts.cl = gfc_new_charlen (gfc_current_ns);
1266 if (sym->attr.flavor == FL_PARAMETER)
1268 if (init->expr_type == EXPR_CONSTANT)
1270 clen = init->value.character.length;
1271 sym->ts.cl->length = gfc_int_expr (clen);
1273 else if (init->expr_type == EXPR_ARRAY)
1275 gfc_expr *p = init->value.constructor->expr;
1276 clen = p->value.character.length;
1277 sym->ts.cl->length = gfc_int_expr (clen);
1279 else if (init->ts.cl && init->ts.cl->length)
1280 sym->ts.cl->length =
1281 gfc_copy_expr (sym->value->ts.cl->length);
1284 /* Update initializer character length according symbol. */
1285 else if (sym->ts.cl->length->expr_type == EXPR_CONSTANT)
1287 int len = mpz_get_si (sym->ts.cl->length->value.integer);
1288 gfc_constructor * p;
1290 if (init->expr_type == EXPR_CONSTANT)
1291 gfc_set_constant_character_len (len, init, -1);
1292 else if (init->expr_type == EXPR_ARRAY)
1294 /* Build a new charlen to prevent simplification from
1295 deleting the length before it is resolved. */
1296 init->ts.cl = gfc_new_charlen (gfc_current_ns);
1297 init->ts.cl->length = gfc_copy_expr (sym->ts.cl->length);
1299 for (p = init->value.constructor; p; p = p->next)
1300 gfc_set_constant_character_len (len, p->expr, -1);
1305 /* Need to check if the expression we initialized this
1306 to was one of the iso_c_binding named constants. If so,
1307 and we're a parameter (constant), let it be iso_c.
1309 integer(c_int), parameter :: my_int = c_int
1310 integer(my_int) :: my_int_2
1311 If we mark my_int as iso_c (since we can see it's value
1312 is equal to one of the named constants), then my_int_2
1313 will be considered C interoperable. */
1314 if (sym->ts.type != BT_CHARACTER && sym->ts.type != BT_DERIVED)
1316 sym->ts.is_iso_c |= init->ts.is_iso_c;
1317 sym->ts.is_c_interop |= init->ts.is_c_interop;
1318 /* attr bits needed for module files. */
1319 sym->attr.is_iso_c |= init->ts.is_iso_c;
1320 sym->attr.is_c_interop |= init->ts.is_c_interop;
1321 if (init->ts.is_iso_c)
1322 sym->ts.f90_type = init->ts.f90_type;
1325 /* Add initializer. Make sure we keep the ranks sane. */
1326 if (sym->attr.dimension && init->rank == 0)
1332 if (sym->attr.flavor == FL_PARAMETER
1333 && init->expr_type == EXPR_CONSTANT
1334 && spec_size (sym->as, &size) == SUCCESS
1335 && mpz_cmp_si (size, 0) > 0)
1337 array = gfc_start_constructor (init->ts.type, init->ts.kind,
1340 array->value.constructor = c = NULL;
1341 for (n = 0; n < (int)mpz_get_si (size); n++)
1343 if (array->value.constructor == NULL)
1345 array->value.constructor = c = gfc_get_constructor ();
1350 c->next = gfc_get_constructor ();
1352 c->expr = gfc_copy_expr (init);
1356 array->shape = gfc_get_shape (sym->as->rank);
1357 for (n = 0; n < sym->as->rank; n++)
1358 spec_dimen_size (sym->as, n, &array->shape[n]);
1363 init->rank = sym->as->rank;
1367 if (sym->attr.save == SAVE_NONE)
1368 sym->attr.save = SAVE_IMPLICIT;
1376 /* Function called by variable_decl() that adds a name to a structure
1380 build_struct (const char *name, gfc_charlen *cl, gfc_expr **init,
1381 gfc_array_spec **as)
1385 /* If the current symbol is of the same derived type that we're
1386 constructing, it must have the pointer attribute. */
1387 if (current_ts.type == BT_DERIVED
1388 && current_ts.derived == gfc_current_block ()
1389 && current_attr.pointer == 0)
1391 gfc_error ("Component at %C must have the POINTER attribute");
1395 if (gfc_current_block ()->attr.pointer && (*as)->rank != 0)
1397 if ((*as)->type != AS_DEFERRED && (*as)->type != AS_EXPLICIT)
1399 gfc_error ("Array component of structure at %C must have explicit "
1400 "or deferred shape");
1405 if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE)
1410 c->attr = current_attr;
1412 c->initializer = *init;
1417 c->attr.dimension = 1;
1420 /* Should this ever get more complicated, combine with similar section
1421 in add_init_expr_to_sym into a separate function. */
1422 if (c->ts.type == BT_CHARACTER && !c->attr.pointer && c->initializer && c->ts.cl
1423 && c->ts.cl->length && c->ts.cl->length->expr_type == EXPR_CONSTANT)
1427 gcc_assert (c->ts.cl && c->ts.cl->length);
1428 gcc_assert (c->ts.cl->length->expr_type == EXPR_CONSTANT);
1429 gcc_assert (c->ts.cl->length->ts.type == BT_INTEGER);
1431 len = mpz_get_si (c->ts.cl->length->value.integer);
1433 if (c->initializer->expr_type == EXPR_CONSTANT)
1434 gfc_set_constant_character_len (len, c->initializer, -1);
1435 else if (mpz_cmp (c->ts.cl->length->value.integer,
1436 c->initializer->ts.cl->length->value.integer))
1439 gfc_constructor *ctor = c->initializer->value.constructor;
1441 has_ts = (c->initializer->ts.cl
1442 && c->initializer->ts.cl->length_from_typespec);
1448 /* Remember the length of the first element for checking
1449 that all elements *in the constructor* have the same
1450 length. This need not be the length of the LHS! */
1451 gcc_assert (ctor->expr->expr_type == EXPR_CONSTANT);
1452 gcc_assert (ctor->expr->ts.type == BT_CHARACTER);
1453 first_len = ctor->expr->value.character.length;
1455 for (; ctor; ctor = ctor->next)
1457 if (ctor->expr->expr_type == EXPR_CONSTANT)
1458 gfc_set_constant_character_len (len, ctor->expr,
1459 has_ts ? -1 : first_len);
1465 /* Check array components. */
1466 if (!c->attr.dimension)
1468 if (c->attr.allocatable)
1470 gfc_error ("Allocatable component at %C must be an array");
1477 if (c->attr.pointer)
1479 if (c->as->type != AS_DEFERRED)
1481 gfc_error ("Pointer array component of structure at %C must have a "
1486 else if (c->attr.allocatable)
1488 if (c->as->type != AS_DEFERRED)
1490 gfc_error ("Allocatable component of structure at %C must have a "
1497 if (c->as->type != AS_EXPLICIT)
1499 gfc_error ("Array component of structure at %C must have an "
1509 /* Match a 'NULL()', and possibly take care of some side effects. */
1512 gfc_match_null (gfc_expr **result)
1518 m = gfc_match (" null ( )");
1522 /* The NULL symbol now has to be/become an intrinsic function. */
1523 if (gfc_get_symbol ("null", NULL, &sym))
1525 gfc_error ("NULL() initialization at %C is ambiguous");
1529 gfc_intrinsic_symbol (sym);
1531 if (sym->attr.proc != PROC_INTRINSIC
1532 && (gfc_add_procedure (&sym->attr, PROC_INTRINSIC,
1533 sym->name, NULL) == FAILURE
1534 || gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE))
1537 e = gfc_get_expr ();
1538 e->where = gfc_current_locus;
1539 e->expr_type = EXPR_NULL;
1540 e->ts.type = BT_UNKNOWN;
1548 /* Match a variable name with an optional initializer. When this
1549 subroutine is called, a variable is expected to be parsed next.
1550 Depending on what is happening at the moment, updates either the
1551 symbol table or the current interface. */
1554 variable_decl (int elem)
1556 char name[GFC_MAX_SYMBOL_LEN + 1];
1557 gfc_expr *initializer, *char_len;
1559 gfc_array_spec *cp_as; /* Extra copy for Cray Pointees. */
1570 old_locus = gfc_current_locus;
1572 /* When we get here, we've just matched a list of attributes and
1573 maybe a type and a double colon. The next thing we expect to see
1574 is the name of the symbol. */
1575 m = gfc_match_name (name);
1579 var_locus = gfc_current_locus;
1581 /* Now we could see the optional array spec. or character length. */
1582 m = gfc_match_array_spec (&as);
1583 if (gfc_option.flag_cray_pointer && m == MATCH_YES)
1584 cp_as = gfc_copy_array_spec (as);
1585 else if (m == MATCH_ERROR)
1589 as = gfc_copy_array_spec (current_as);
1594 if (current_ts.type == BT_CHARACTER)
1596 switch (match_char_length (&char_len))
1599 cl = gfc_new_charlen (gfc_current_ns);
1601 cl->length = char_len;
1604 /* Non-constant lengths need to be copied after the first
1605 element. Also copy assumed lengths. */
1608 && (current_ts.cl->length == NULL
1609 || current_ts.cl->length->expr_type != EXPR_CONSTANT))
1611 cl = gfc_new_charlen (gfc_current_ns);
1612 cl->length = gfc_copy_expr (current_ts.cl->length);
1624 /* If this symbol has already shown up in a Cray Pointer declaration,
1625 then we want to set the type & bail out. */
1626 if (gfc_option.flag_cray_pointer)
1628 gfc_find_symbol (name, gfc_current_ns, 1, &sym);
1629 if (sym != NULL && sym->attr.cray_pointee)
1631 sym->ts.type = current_ts.type;
1632 sym->ts.kind = current_ts.kind;
1634 sym->ts.derived = current_ts.derived;
1635 sym->ts.is_c_interop = current_ts.is_c_interop;
1636 sym->ts.is_iso_c = current_ts.is_iso_c;
1639 /* Check to see if we have an array specification. */
1642 if (sym->as != NULL)
1644 gfc_error ("Duplicate array spec for Cray pointee at %C");
1645 gfc_free_array_spec (cp_as);
1651 if (gfc_set_array_spec (sym, cp_as, &var_locus) == FAILURE)
1652 gfc_internal_error ("Couldn't set pointee array spec.");
1654 /* Fix the array spec. */
1655 m = gfc_mod_pointee_as (sym->as);
1656 if (m == MATCH_ERROR)
1664 gfc_free_array_spec (cp_as);
1668 /* Procedure pointer as function result. */
1669 if (gfc_current_state () == COMP_FUNCTION
1670 && strcmp ("ppr@", gfc_current_block ()->name) == 0
1671 && strcmp (name, gfc_current_block ()->ns->proc_name->name) == 0)
1672 strcpy (name, "ppr@");
1674 if (gfc_current_state () == COMP_FUNCTION
1675 && strcmp (name, gfc_current_block ()->name) == 0
1676 && gfc_current_block ()->result
1677 && strcmp ("ppr@", gfc_current_block ()->result->name) == 0)
1678 strcpy (name, "ppr@");
1680 /* OK, we've successfully matched the declaration. Now put the
1681 symbol in the current namespace, because it might be used in the
1682 optional initialization expression for this symbol, e.g. this is
1685 integer, parameter :: i = huge(i)
1687 This is only true for parameters or variables of a basic type.
1688 For components of derived types, it is not true, so we don't
1689 create a symbol for those yet. If we fail to create the symbol,
1691 if (gfc_current_state () != COMP_DERIVED
1692 && build_sym (name, cl, &as, &var_locus) == FAILURE)
1698 /* An interface body specifies all of the procedure's
1699 characteristics and these shall be consistent with those
1700 specified in the procedure definition, except that the interface
1701 may specify a procedure that is not pure if the procedure is
1702 defined to be pure(12.3.2). */
1703 if (current_ts.type == BT_DERIVED
1704 && gfc_current_ns->proc_name
1705 && gfc_current_ns->proc_name->attr.if_source == IFSRC_IFBODY
1706 && current_ts.derived->ns != gfc_current_ns)
1709 st = gfc_find_symtree (gfc_current_ns->sym_root, current_ts.derived->name);
1710 if (!(current_ts.derived->attr.imported
1712 && st->n.sym == current_ts.derived)
1713 && !gfc_current_ns->has_import_set)
1715 gfc_error ("the type of '%s' at %C has not been declared within the "
1722 /* In functions that have a RESULT variable defined, the function
1723 name always refers to function calls. Therefore, the name is
1724 not allowed to appear in specification statements. */
1725 if (gfc_current_state () == COMP_FUNCTION
1726 && gfc_current_block () != NULL
1727 && gfc_current_block ()->result != NULL
1728 && gfc_current_block ()->result != gfc_current_block ()
1729 && strcmp (gfc_current_block ()->name, name) == 0)
1731 gfc_error ("Function name '%s' not allowed at %C", name);
1736 /* We allow old-style initializations of the form
1737 integer i /2/, j(4) /3*3, 1/
1738 (if no colon has been seen). These are different from data
1739 statements in that initializers are only allowed to apply to the
1740 variable immediately preceding, i.e.
1742 is not allowed. Therefore we have to do some work manually, that
1743 could otherwise be left to the matchers for DATA statements. */
1745 if (!colon_seen && gfc_match (" /") == MATCH_YES)
1747 if (gfc_notify_std (GFC_STD_GNU, "Extension: Old-style "
1748 "initialization at %C") == FAILURE)
1751 return match_old_style_init (name);
1754 /* The double colon must be present in order to have initializers.
1755 Otherwise the statement is ambiguous with an assignment statement. */
1758 if (gfc_match (" =>") == MATCH_YES)
1760 if (!current_attr.pointer)
1762 gfc_error ("Initialization at %C isn't for a pointer variable");
1767 m = gfc_match_null (&initializer);
1770 gfc_error ("Pointer initialization requires a NULL() at %C");
1774 if (gfc_pure (NULL))
1776 gfc_error ("Initialization of pointer at %C is not allowed in "
1777 "a PURE procedure");
1785 else if (gfc_match_char ('=') == MATCH_YES)
1787 if (current_attr.pointer)
1789 gfc_error ("Pointer initialization at %C requires '=>', "
1795 m = gfc_match_init_expr (&initializer);
1798 gfc_error ("Expected an initialization expression at %C");
1802 if (current_attr.flavor != FL_PARAMETER && gfc_pure (NULL))
1804 gfc_error ("Initialization of variable at %C is not allowed in "
1805 "a PURE procedure");
1814 if (initializer != NULL && current_attr.allocatable
1815 && gfc_current_state () == COMP_DERIVED)
1817 gfc_error ("Initialization of allocatable component at %C is not "
1823 /* Add the initializer. Note that it is fine if initializer is
1824 NULL here, because we sometimes also need to check if a
1825 declaration *must* have an initialization expression. */
1826 if (gfc_current_state () != COMP_DERIVED)
1827 t = add_init_expr_to_sym (name, &initializer, &var_locus);
1830 if (current_ts.type == BT_DERIVED
1831 && !current_attr.pointer && !initializer)
1832 initializer = gfc_default_initializer (¤t_ts);
1833 t = build_struct (name, cl, &initializer, &as);
1836 m = (t == SUCCESS) ? MATCH_YES : MATCH_ERROR;
1839 /* Free stuff up and return. */
1840 gfc_free_expr (initializer);
1841 gfc_free_array_spec (as);
1847 /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification.
1848 This assumes that the byte size is equal to the kind number for
1849 non-COMPLEX types, and equal to twice the kind number for COMPLEX. */
1852 gfc_match_old_kind_spec (gfc_typespec *ts)
1857 if (gfc_match_char ('*') != MATCH_YES)
1860 m = gfc_match_small_literal_int (&ts->kind, NULL);
1864 original_kind = ts->kind;
1866 /* Massage the kind numbers for complex types. */
1867 if (ts->type == BT_COMPLEX)
1871 gfc_error ("Old-style type declaration %s*%d not supported at %C",
1872 gfc_basic_typename (ts->type), original_kind);
1878 if (gfc_validate_kind (ts->type, ts->kind, true) < 0)
1880 gfc_error ("Old-style type declaration %s*%d not supported at %C",
1881 gfc_basic_typename (ts->type), original_kind);
1885 if (gfc_notify_std (GFC_STD_GNU, "Nonstandard type declaration %s*%d at %C",
1886 gfc_basic_typename (ts->type), original_kind) == FAILURE)
1893 /* Match a kind specification. Since kinds are generally optional, we
1894 usually return MATCH_NO if something goes wrong. If a "kind="
1895 string is found, then we know we have an error. */
1898 gfc_match_kind_spec (gfc_typespec *ts, bool kind_expr_only)
1910 where = loc = gfc_current_locus;
1915 if (gfc_match_char ('(') == MATCH_NO)
1918 /* Also gobbles optional text. */
1919 if (gfc_match (" kind = ") == MATCH_YES)
1922 loc = gfc_current_locus;
1925 n = gfc_match_init_expr (&e);
1929 if (gfc_matching_function)
1931 /* The function kind expression might include use associated or
1932 imported parameters and try again after the specification
1934 if (gfc_match_char (')') != MATCH_YES)
1936 gfc_error ("Missing right parenthesis at %C");
1942 gfc_undo_symbols ();
1947 /* ....or else, the match is real. */
1949 gfc_error ("Expected initialization expression at %C");
1957 gfc_error ("Expected scalar initialization expression at %C");
1962 msg = gfc_extract_int (e, &ts->kind);
1971 /* Before throwing away the expression, let's see if we had a
1972 C interoperable kind (and store the fact). */
1973 if (e->ts.is_c_interop == 1)
1975 /* Mark this as c interoperable if being declared with one
1976 of the named constants from iso_c_binding. */
1977 ts->is_c_interop = e->ts.is_iso_c;
1978 ts->f90_type = e->ts.f90_type;
1984 /* Ignore errors to this point, if we've gotten here. This means
1985 we ignore the m=MATCH_ERROR from above. */
1986 if (gfc_validate_kind (ts->type, ts->kind, true) < 0)
1988 gfc_error ("Kind %d not supported for type %s at %C", ts->kind,
1989 gfc_basic_typename (ts->type));
1990 gfc_current_locus = where;
1994 /* Warn if, e.g., c_int is used for a REAL variable, but not
1995 if, e.g., c_double is used for COMPLEX as the standard
1996 explicitly says that the kind type parameter for complex and real
1997 variable is the same, i.e. c_float == c_float_complex. */
1998 if (ts->f90_type != BT_UNKNOWN && ts->f90_type != ts->type
1999 && !((ts->f90_type == BT_REAL && ts->type == BT_COMPLEX)
2000 || (ts->f90_type == BT_COMPLEX && ts->type == BT_REAL)))
2001 gfc_warning_now ("C kind type parameter is for type %s but type at %L "
2002 "is %s", gfc_basic_typename (ts->f90_type), &where,
2003 gfc_basic_typename (ts->type));
2005 gfc_gobble_whitespace ();
2006 if ((c = gfc_next_ascii_char ()) != ')'
2007 && (ts->type != BT_CHARACTER || c != ','))
2009 if (ts->type == BT_CHARACTER)
2010 gfc_error ("Missing right parenthesis or comma at %C");
2012 gfc_error ("Missing right parenthesis at %C");
2016 /* All tests passed. */
2019 if(m == MATCH_ERROR)
2020 gfc_current_locus = where;
2022 /* Return what we know from the test(s). */
2027 gfc_current_locus = where;
2033 match_char_kind (int * kind, int * is_iso_c)
2042 where = gfc_current_locus;
2044 n = gfc_match_init_expr (&e);
2046 if (n != MATCH_YES && gfc_matching_function)
2048 /* The expression might include use-associated or imported
2049 parameters and try again after the specification
2052 gfc_undo_symbols ();
2057 gfc_error ("Expected initialization expression at %C");
2063 gfc_error ("Expected scalar initialization expression at %C");
2068 msg = gfc_extract_int (e, kind);
2069 *is_iso_c = e->ts.is_iso_c;
2079 /* Ignore errors to this point, if we've gotten here. This means
2080 we ignore the m=MATCH_ERROR from above. */
2081 if (gfc_validate_kind (BT_CHARACTER, *kind, true) < 0)
2083 gfc_error ("Kind %d is not supported for CHARACTER at %C", *kind);
2087 /* All tests passed. */
2090 if (m == MATCH_ERROR)
2091 gfc_current_locus = where;
2093 /* Return what we know from the test(s). */
2098 gfc_current_locus = where;
2102 /* Match the various kind/length specifications in a CHARACTER
2103 declaration. We don't return MATCH_NO. */
2106 match_char_spec (gfc_typespec *ts)
2108 int kind, seen_length, is_iso_c;
2118 /* Try the old-style specification first. */
2119 old_char_selector = 0;
2121 m = match_char_length (&len);
2125 old_char_selector = 1;
2130 m = gfc_match_char ('(');
2133 m = MATCH_YES; /* Character without length is a single char. */
2137 /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ). */
2138 if (gfc_match (" kind =") == MATCH_YES)
2140 m = match_char_kind (&kind, &is_iso_c);
2142 if (m == MATCH_ERROR)
2147 if (gfc_match (" , len =") == MATCH_NO)
2150 m = char_len_param_value (&len);
2153 if (m == MATCH_ERROR)
2160 /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>". */
2161 if (gfc_match (" len =") == MATCH_YES)
2163 m = char_len_param_value (&len);
2166 if (m == MATCH_ERROR)
2170 if (gfc_match_char (')') == MATCH_YES)
2173 if (gfc_match (" , kind =") != MATCH_YES)
2176 if (match_char_kind (&kind, &is_iso_c) == MATCH_ERROR)
2182 /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */
2183 m = char_len_param_value (&len);
2186 if (m == MATCH_ERROR)
2190 m = gfc_match_char (')');
2194 if (gfc_match_char (',') != MATCH_YES)
2197 gfc_match (" kind ="); /* Gobble optional text. */
2199 m = match_char_kind (&kind, &is_iso_c);
2200 if (m == MATCH_ERROR)
2206 /* Require a right-paren at this point. */
2207 m = gfc_match_char (')');
2212 gfc_error ("Syntax error in CHARACTER declaration at %C");
2214 gfc_free_expr (len);
2218 /* Deal with character functions after USE and IMPORT statements. */
2219 if (gfc_matching_function)
2221 gfc_free_expr (len);
2222 gfc_undo_symbols ();
2228 gfc_free_expr (len);
2232 /* Do some final massaging of the length values. */
2233 cl = gfc_new_charlen (gfc_current_ns);
2235 if (seen_length == 0)
2236 cl->length = gfc_int_expr (1);
2241 ts->kind = kind == 0 ? gfc_default_character_kind : kind;
2243 /* We have to know if it was a c interoperable kind so we can
2244 do accurate type checking of bind(c) procs, etc. */
2246 /* Mark this as c interoperable if being declared with one
2247 of the named constants from iso_c_binding. */
2248 ts->is_c_interop = is_iso_c;
2249 else if (len != NULL)
2250 /* Here, we might have parsed something such as: character(c_char)
2251 In this case, the parsing code above grabs the c_char when
2252 looking for the length (line 1690, roughly). it's the last
2253 testcase for parsing the kind params of a character variable.
2254 However, it's not actually the length. this seems like it
2256 To see if the user used a C interop kind, test the expr
2257 of the so called length, and see if it's C interoperable. */
2258 ts->is_c_interop = len->ts.is_iso_c;
2264 /* Matches a type specification. If successful, sets the ts structure
2265 to the matched specification. This is necessary for FUNCTION and
2266 IMPLICIT statements.
2268 If implicit_flag is nonzero, then we don't check for the optional
2269 kind specification. Not doing so is needed for matching an IMPLICIT
2270 statement correctly. */
2273 gfc_match_type_spec (gfc_typespec *ts, int implicit_flag)
2275 char name[GFC_MAX_SYMBOL_LEN + 1];
2279 bool seen_deferred_kind;
2281 /* A belt and braces check that the typespec is correctly being treated
2282 as a deferred characteristic association. */
2283 seen_deferred_kind = (gfc_current_state () == COMP_FUNCTION)
2284 && (gfc_current_block ()->result->ts.kind == -1)
2285 && (ts->kind == -1);
2287 if (seen_deferred_kind)
2290 /* Clear the current binding label, in case one is given. */
2291 curr_binding_label[0] = '\0';
2293 if (gfc_match (" byte") == MATCH_YES)
2295 if (gfc_notify_std(GFC_STD_GNU, "Extension: BYTE type at %C")
2299 if (gfc_validate_kind (BT_INTEGER, 1, true) < 0)
2301 gfc_error ("BYTE type used at %C "
2302 "is not available on the target machine");
2306 ts->type = BT_INTEGER;
2311 if (gfc_match (" integer") == MATCH_YES)
2313 ts->type = BT_INTEGER;
2314 ts->kind = gfc_default_integer_kind;
2318 if (gfc_match (" character") == MATCH_YES)
2320 ts->type = BT_CHARACTER;
2321 if (implicit_flag == 0)
2322 return match_char_spec (ts);
2327 if (gfc_match (" real") == MATCH_YES)
2330 ts->kind = gfc_default_real_kind;
2334 if (gfc_match (" double precision") == MATCH_YES)
2337 ts->kind = gfc_default_double_kind;
2341 if (gfc_match (" complex") == MATCH_YES)
2343 ts->type = BT_COMPLEX;
2344 ts->kind = gfc_default_complex_kind;
2348 if (gfc_match (" double complex") == MATCH_YES)
2350 if (gfc_notify_std (GFC_STD_GNU, "DOUBLE COMPLEX at %C does not "
2351 "conform to the Fortran 95 standard") == FAILURE)
2354 ts->type = BT_COMPLEX;
2355 ts->kind = gfc_default_double_kind;
2359 if (gfc_match (" logical") == MATCH_YES)
2361 ts->type = BT_LOGICAL;
2362 ts->kind = gfc_default_logical_kind;
2366 m = gfc_match (" type ( %n )", name);
2370 ts->type = BT_DERIVED;
2372 /* Defer association of the derived type until the end of the
2373 specification block. However, if the derived type can be
2374 found, add it to the typespec. */
2375 if (gfc_matching_function)
2378 if (gfc_current_state () != COMP_INTERFACE
2379 && !gfc_find_symbol (name, NULL, 1, &sym) && sym)
2384 /* Search for the name but allow the components to be defined later. If
2385 type = -1, this typespec has been seen in a function declaration but
2386 the type could not be accessed at that point. */
2388 if (ts->kind != -1 && gfc_get_ha_symbol (name, &sym))
2390 gfc_error ("Type name '%s' at %C is ambiguous", name);
2393 else if (ts->kind == -1)
2395 int iface = gfc_state_stack->previous->state != COMP_INTERFACE
2396 || gfc_current_ns->has_import_set;
2397 if (gfc_find_symbol (name, NULL, iface, &sym))
2399 gfc_error ("Type name '%s' at %C is ambiguous", name);
2408 if (sym->attr.flavor != FL_DERIVED
2409 && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE)
2412 gfc_set_sym_referenced (sym);
2418 /* For all types except double, derived and character, look for an
2419 optional kind specifier. MATCH_NO is actually OK at this point. */
2420 if (implicit_flag == 1)
2423 if (gfc_current_form == FORM_FREE)
2425 c = gfc_peek_ascii_char();
2426 if (!gfc_is_whitespace(c) && c != '*' && c != '('
2427 && c != ':' && c != ',')
2431 m = gfc_match_kind_spec (ts, false);
2432 if (m == MATCH_NO && ts->type != BT_CHARACTER)
2433 m = gfc_match_old_kind_spec (ts);
2435 /* Defer association of the KIND expression of function results
2436 until after USE and IMPORT statements. */
2437 if ((gfc_current_state () == COMP_NONE && gfc_error_flag_test ())
2438 || gfc_matching_function)
2442 m = MATCH_YES; /* No kind specifier found. */
2448 /* Match an IMPLICIT NONE statement. Actually, this statement is
2449 already matched in parse.c, or we would not end up here in the
2450 first place. So the only thing we need to check, is if there is
2451 trailing garbage. If not, the match is successful. */
2454 gfc_match_implicit_none (void)
2456 return (gfc_match_eos () == MATCH_YES) ? MATCH_YES : MATCH_NO;
2460 /* Match the letter range(s) of an IMPLICIT statement. */
2463 match_implicit_range (void)
2469 cur_loc = gfc_current_locus;
2471 gfc_gobble_whitespace ();
2472 c = gfc_next_ascii_char ();
2475 gfc_error ("Missing character range in IMPLICIT at %C");
2482 gfc_gobble_whitespace ();
2483 c1 = gfc_next_ascii_char ();
2487 gfc_gobble_whitespace ();
2488 c = gfc_next_ascii_char ();
2493 inner = 0; /* Fall through. */
2500 gfc_gobble_whitespace ();
2501 c2 = gfc_next_ascii_char ();
2505 gfc_gobble_whitespace ();
2506 c = gfc_next_ascii_char ();
2508 if ((c != ',') && (c != ')'))
2521 gfc_error ("Letters must be in alphabetic order in "
2522 "IMPLICIT statement at %C");
2526 /* See if we can add the newly matched range to the pending
2527 implicits from this IMPLICIT statement. We do not check for
2528 conflicts with whatever earlier IMPLICIT statements may have
2529 set. This is done when we've successfully finished matching
2531 if (gfc_add_new_implicit_range (c1, c2) != SUCCESS)
2538 gfc_syntax_error (ST_IMPLICIT);
2540 gfc_current_locus = cur_loc;
2545 /* Match an IMPLICIT statement, storing the types for
2546 gfc_set_implicit() if the statement is accepted by the parser.
2547 There is a strange looking, but legal syntactic construction
2548 possible. It looks like:
2550 IMPLICIT INTEGER (a-b) (c-d)
2552 This is legal if "a-b" is a constant expression that happens to
2553 equal one of the legal kinds for integers. The real problem
2554 happens with an implicit specification that looks like:
2556 IMPLICIT INTEGER (a-b)
2558 In this case, a typespec matcher that is "greedy" (as most of the
2559 matchers are) gobbles the character range as a kindspec, leaving
2560 nothing left. We therefore have to go a bit more slowly in the
2561 matching process by inhibiting the kindspec checking during
2562 typespec matching and checking for a kind later. */
2565 gfc_match_implicit (void)
2574 /* We don't allow empty implicit statements. */
2575 if (gfc_match_eos () == MATCH_YES)
2577 gfc_error ("Empty IMPLICIT statement at %C");
2583 /* First cleanup. */
2584 gfc_clear_new_implicit ();
2586 /* A basic type is mandatory here. */
2587 m = gfc_match_type_spec (&ts, 1);
2588 if (m == MATCH_ERROR)
2593 cur_loc = gfc_current_locus;
2594 m = match_implicit_range ();
2598 /* We may have <TYPE> (<RANGE>). */
2599 gfc_gobble_whitespace ();
2600 c = gfc_next_ascii_char ();
2601 if ((c == '\n') || (c == ','))
2603 /* Check for CHARACTER with no length parameter. */
2604 if (ts.type == BT_CHARACTER && !ts.cl)
2606 ts.kind = gfc_default_character_kind;
2607 ts.cl = gfc_new_charlen (gfc_current_ns);
2608 ts.cl->length = gfc_int_expr (1);
2611 /* Record the Successful match. */
2612 if (gfc_merge_new_implicit (&ts) != SUCCESS)
2617 gfc_current_locus = cur_loc;
2620 /* Discard the (incorrectly) matched range. */
2621 gfc_clear_new_implicit ();
2623 /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */
2624 if (ts.type == BT_CHARACTER)
2625 m = match_char_spec (&ts);
2628 m = gfc_match_kind_spec (&ts, false);
2631 m = gfc_match_old_kind_spec (&ts);
2632 if (m == MATCH_ERROR)
2638 if (m == MATCH_ERROR)
2641 m = match_implicit_range ();
2642 if (m == MATCH_ERROR)
2647 gfc_gobble_whitespace ();
2648 c = gfc_next_ascii_char ();
2649 if ((c != '\n') && (c != ','))
2652 if (gfc_merge_new_implicit (&ts) != SUCCESS)
2660 gfc_syntax_error (ST_IMPLICIT);
2668 gfc_match_import (void)
2670 char name[GFC_MAX_SYMBOL_LEN + 1];
2675 if (gfc_current_ns->proc_name == NULL
2676 || gfc_current_ns->proc_name->attr.if_source != IFSRC_IFBODY)
2678 gfc_error ("IMPORT statement at %C only permitted in "
2679 "an INTERFACE body");
2683 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IMPORT statement at %C")
2687 if (gfc_match_eos () == MATCH_YES)
2689 /* All host variables should be imported. */
2690 gfc_current_ns->has_import_set = 1;
2694 if (gfc_match (" ::") == MATCH_YES)
2696 if (gfc_match_eos () == MATCH_YES)
2698 gfc_error ("Expecting list of named entities at %C");
2705 m = gfc_match (" %n", name);
2709 if (gfc_current_ns->parent != NULL
2710 && gfc_find_symbol (name, gfc_current_ns->parent, 1, &sym))
2712 gfc_error ("Type name '%s' at %C is ambiguous", name);
2715 else if (gfc_current_ns->proc_name->ns->parent != NULL
2716 && gfc_find_symbol (name,
2717 gfc_current_ns->proc_name->ns->parent,
2720 gfc_error ("Type name '%s' at %C is ambiguous", name);
2726 gfc_error ("Cannot IMPORT '%s' from host scoping unit "
2727 "at %C - does not exist.", name);
2731 if (gfc_find_symtree (gfc_current_ns->sym_root,name))
2733 gfc_warning ("'%s' is already IMPORTed from host scoping unit "
2738 st = gfc_new_symtree (&gfc_current_ns->sym_root, sym->name);
2741 sym->attr.imported = 1;
2753 if (gfc_match_eos () == MATCH_YES)
2755 if (gfc_match_char (',') != MATCH_YES)
2762 gfc_error ("Syntax error in IMPORT statement at %C");
2767 /* A minimal implementation of gfc_match without whitespace, escape
2768 characters or variable arguments. Returns true if the next
2769 characters match the TARGET template exactly. */
2772 match_string_p (const char *target)
2776 for (p = target; *p; p++)
2777 if ((char) gfc_next_ascii_char () != *p)
2782 /* Matches an attribute specification including array specs. If
2783 successful, leaves the variables current_attr and current_as
2784 holding the specification. Also sets the colon_seen variable for
2785 later use by matchers associated with initializations.
2787 This subroutine is a little tricky in the sense that we don't know
2788 if we really have an attr-spec until we hit the double colon.
2789 Until that time, we can only return MATCH_NO. This forces us to
2790 check for duplicate specification at this level. */
2793 match_attr_spec (void)
2795 /* Modifiers that can exist in a type statement. */
2797 { GFC_DECL_BEGIN = 0,
2798 DECL_ALLOCATABLE = GFC_DECL_BEGIN, DECL_DIMENSION, DECL_EXTERNAL,
2799 DECL_IN, DECL_OUT, DECL_INOUT, DECL_INTRINSIC, DECL_OPTIONAL,
2800 DECL_PARAMETER, DECL_POINTER, DECL_PROTECTED, DECL_PRIVATE,
2801 DECL_PUBLIC, DECL_SAVE, DECL_TARGET, DECL_VALUE, DECL_VOLATILE,
2802 DECL_IS_BIND_C, DECL_NONE,
2803 GFC_DECL_END /* Sentinel */
2807 /* GFC_DECL_END is the sentinel, index starts at 0. */
2808 #define NUM_DECL GFC_DECL_END
2810 locus start, seen_at[NUM_DECL];
2817 gfc_clear_attr (¤t_attr);
2818 start = gfc_current_locus;
2823 /* See if we get all of the keywords up to the final double colon. */
2824 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
2832 gfc_gobble_whitespace ();
2834 ch = gfc_next_ascii_char ();
2837 /* This is the successful exit condition for the loop. */
2838 if (gfc_next_ascii_char () == ':')
2843 gfc_gobble_whitespace ();
2844 switch (gfc_peek_ascii_char ())
2847 if (match_string_p ("allocatable"))
2848 d = DECL_ALLOCATABLE;
2852 /* Try and match the bind(c). */
2853 m = gfc_match_bind_c (NULL, true);
2856 else if (m == MATCH_ERROR)
2861 if (match_string_p ("dimension"))
2866 if (match_string_p ("external"))
2871 if (match_string_p ("int"))
2873 ch = gfc_next_ascii_char ();
2876 if (match_string_p ("nt"))
2878 /* Matched "intent". */
2879 /* TODO: Call match_intent_spec from here. */
2880 if (gfc_match (" ( in out )") == MATCH_YES)
2882 else if (gfc_match (" ( in )") == MATCH_YES)
2884 else if (gfc_match (" ( out )") == MATCH_YES)
2890 if (match_string_p ("insic"))
2892 /* Matched "intrinsic". */
2900 if (match_string_p ("optional"))
2905 gfc_next_ascii_char ();
2906 switch (gfc_next_ascii_char ())
2909 if (match_string_p ("rameter"))
2911 /* Matched "parameter". */
2917 if (match_string_p ("inter"))
2919 /* Matched "pointer". */
2925 ch = gfc_next_ascii_char ();
2928 if (match_string_p ("vate"))
2930 /* Matched "private". */
2936 if (match_string_p ("tected"))
2938 /* Matched "protected". */
2945 if (match_string_p ("blic"))
2947 /* Matched "public". */
2955 if (match_string_p ("save"))
2960 if (match_string_p ("target"))
2965 gfc_next_ascii_char ();
2966 ch = gfc_next_ascii_char ();
2969 if (match_string_p ("lue"))
2971 /* Matched "value". */
2977 if (match_string_p ("latile"))
2979 /* Matched "volatile". */
2987 /* No double colon and no recognizable decl_type, so assume that
2988 we've been looking at something else the whole time. */
2995 /* Check to make sure any parens are paired up correctly. */
2996 if (gfc_match_parens () == MATCH_ERROR)
3003 seen_at[d] = gfc_current_locus;
3005 if (d == DECL_DIMENSION)
3007 m = gfc_match_array_spec (¤t_as);
3011 gfc_error ("Missing dimension specification at %C");
3015 if (m == MATCH_ERROR)
3020 /* Since we've seen a double colon, we have to be looking at an
3021 attr-spec. This means that we can now issue errors. */
3022 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
3027 case DECL_ALLOCATABLE:
3028 attr = "ALLOCATABLE";
3030 case DECL_DIMENSION:
3037 attr = "INTENT (IN)";
3040 attr = "INTENT (OUT)";
3043 attr = "INTENT (IN OUT)";
3045 case DECL_INTRINSIC:
3051 case DECL_PARAMETER:
3057 case DECL_PROTECTED:
3072 case DECL_IS_BIND_C:
3082 attr = NULL; /* This shouldn't happen. */
3085 gfc_error ("Duplicate %s attribute at %L", attr, &seen_at[d]);
3090 /* Now that we've dealt with duplicate attributes, add the attributes
3091 to the current attribute. */
3092 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
3097 if (gfc_current_state () == COMP_DERIVED
3098 && d != DECL_DIMENSION && d != DECL_POINTER
3099 && d != DECL_PRIVATE && d != DECL_PUBLIC
3102 if (d == DECL_ALLOCATABLE)
3104 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ALLOCATABLE "
3105 "attribute at %C in a TYPE definition")
3114 gfc_error ("Attribute at %L is not allowed in a TYPE definition",
3121 if ((d == DECL_PRIVATE || d == DECL_PUBLIC)
3122 && gfc_current_state () != COMP_MODULE)
3124 if (d == DECL_PRIVATE)
3128 if (gfc_current_state () == COMP_DERIVED
3129 && gfc_state_stack->previous
3130 && gfc_state_stack->previous->state == COMP_MODULE)
3132 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Attribute %s "
3133 "at %L in a TYPE definition", attr,
3143 gfc_error ("%s attribute at %L is not allowed outside of the "
3144 "specification part of a module", attr, &seen_at[d]);
3152 case DECL_ALLOCATABLE:
3153 t = gfc_add_allocatable (¤t_attr, &seen_at[d]);
3156 case DECL_DIMENSION:
3157 t = gfc_add_dimension (¤t_attr, NULL, &seen_at[d]);
3161 t = gfc_add_external (¤t_attr, &seen_at[d]);
3165 t = gfc_add_intent (¤t_attr, INTENT_IN, &seen_at[d]);
3169 t = gfc_add_intent (¤t_attr, INTENT_OUT, &seen_at[d]);
3173 t = gfc_add_intent (¤t_attr, INTENT_INOUT, &seen_at[d]);
3176 case DECL_INTRINSIC:
3177 t = gfc_add_intrinsic (¤t_attr, &seen_at[d]);
3181 t = gfc_add_optional (¤t_attr, &seen_at[d]);
3184 case DECL_PARAMETER:
3185 t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, &seen_at[d]);
3189 t = gfc_add_pointer (¤t_attr, &seen_at[d]);
3192 case DECL_PROTECTED:
3193 if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE)
3195 gfc_error ("PROTECTED at %C only allowed in specification "
3196 "part of a module");
3201 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED "
3206 t = gfc_add_protected (¤t_attr, NULL, &seen_at[d]);
3210 t = gfc_add_access (¤t_attr, ACCESS_PRIVATE, NULL,
3215 t = gfc_add_access (¤t_attr, ACCESS_PUBLIC, NULL,
3220 t = gfc_add_save (¤t_attr, NULL, &seen_at[d]);
3224 t = gfc_add_target (¤t_attr, &seen_at[d]);
3227 case DECL_IS_BIND_C:
3228 t = gfc_add_is_bind_c(¤t_attr, NULL, &seen_at[d], 0);
3232 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE attribute "
3237 t = gfc_add_value (¤t_attr, NULL, &seen_at[d]);
3241 if (gfc_notify_std (GFC_STD_F2003,
3242 "Fortran 2003: VOLATILE attribute at %C")
3246 t = gfc_add_volatile (¤t_attr, NULL, &seen_at[d]);
3250 gfc_internal_error ("match_attr_spec(): Bad attribute");
3264 gfc_current_locus = start;
3265 gfc_free_array_spec (current_as);
3271 /* Set the binding label, dest_label, either with the binding label
3272 stored in the given gfc_typespec, ts, or if none was provided, it
3273 will be the symbol name in all lower case, as required by the draft
3274 (J3/04-007, section 15.4.1). If a binding label was given and
3275 there is more than one argument (num_idents), it is an error. */
3278 set_binding_label (char *dest_label, const char *sym_name, int num_idents)
3280 if (num_idents > 1 && has_name_equals)
3282 gfc_error ("Multiple identifiers provided with "
3283 "single NAME= specifier at %C");
3287 if (curr_binding_label[0] != '\0')
3289 /* Binding label given; store in temp holder til have sym. */
3290 strcpy (dest_label, curr_binding_label);
3294 /* No binding label given, and the NAME= specifier did not exist,
3295 which means there was no NAME="". */
3296 if (sym_name != NULL && has_name_equals == 0)
3297 strcpy (dest_label, sym_name);
3304 /* Set the status of the given common block as being BIND(C) or not,
3305 depending on the given parameter, is_bind_c. */
3308 set_com_block_bind_c (gfc_common_head *com_block, int is_bind_c)
3310 com_block->is_bind_c = is_bind_c;
3315 /* Verify that the given gfc_typespec is for a C interoperable type. */
3318 verify_c_interop (gfc_typespec *ts)
3320 if (ts->type == BT_DERIVED && ts->derived != NULL)
3321 return (ts->derived->ts.is_c_interop ? SUCCESS : FAILURE);
3322 else if (ts->is_c_interop != 1)
3329 /* Verify that the variables of a given common block, which has been
3330 defined with the attribute specifier bind(c), to be of a C
3331 interoperable type. Errors will be reported here, if
3335 verify_com_block_vars_c_interop (gfc_common_head *com_block)
3337 gfc_symbol *curr_sym = NULL;
3338 gfc_try retval = SUCCESS;
3340 curr_sym = com_block->head;
3342 /* Make sure we have at least one symbol. */
3343 if (curr_sym == NULL)
3346 /* Here we know we have a symbol, so we'll execute this loop
3350 /* The second to last param, 1, says this is in a common block. */
3351 retval = verify_bind_c_sym (curr_sym, &(curr_sym->ts), 1, com_block);
3352 curr_sym = curr_sym->common_next;
3353 } while (curr_sym != NULL);
3359 /* Verify that a given BIND(C) symbol is C interoperable. If it is not,
3360 an appropriate error message is reported. */
3363 verify_bind_c_sym (gfc_symbol *tmp_sym, gfc_typespec *ts,
3364 int is_in_common, gfc_common_head *com_block)
3366 bool bind_c_function = false;
3367 gfc_try retval = SUCCESS;
3369 if (tmp_sym->attr.function && tmp_sym->attr.is_bind_c)
3370 bind_c_function = true;
3372 if (tmp_sym->attr.function && tmp_sym->result != NULL)
3374 tmp_sym = tmp_sym->result;
3375 /* Make sure it wasn't an implicitly typed result. */
3376 if (tmp_sym->attr.implicit_type)
3378 gfc_warning ("Implicitly declared BIND(C) function '%s' at "
3379 "%L may not be C interoperable", tmp_sym->name,
3380 &tmp_sym->declared_at);
3381 tmp_sym->ts.f90_type = tmp_sym->ts.type;
3382 /* Mark it as C interoperable to prevent duplicate warnings. */
3383 tmp_sym->ts.is_c_interop = 1;
3384 tmp_sym->attr.is_c_interop = 1;
3388 /* Here, we know we have the bind(c) attribute, so if we have
3389 enough type info, then verify that it's a C interop kind.
3390 The info could be in the symbol already, or possibly still in
3391 the given ts (current_ts), so look in both. */
3392 if (tmp_sym->ts.type != BT_UNKNOWN || ts->type != BT_UNKNOWN)
3394 if (verify_c_interop (&(tmp_sym->ts)) != SUCCESS)
3396 /* See if we're dealing with a sym in a common block or not. */
3397 if (is_in_common == 1)
3399 gfc_warning ("Variable '%s' in common block '%s' at %L "
3400 "may not be a C interoperable "
3401 "kind though common block '%s' is BIND(C)",
3402 tmp_sym->name, com_block->name,
3403 &(tmp_sym->declared_at), com_block->name);
3407 if (tmp_sym->ts.type == BT_DERIVED || ts->type == BT_DERIVED)
3408 gfc_error ("Type declaration '%s' at %L is not C "
3409 "interoperable but it is BIND(C)",
3410 tmp_sym->name, &(tmp_sym->declared_at));
3412 gfc_warning ("Variable '%s' at %L "
3413 "may not be a C interoperable "
3414 "kind but it is bind(c)",
3415 tmp_sym->name, &(tmp_sym->declared_at));
3419 /* Variables declared w/in a common block can't be bind(c)
3420 since there's no way for C to see these variables, so there's
3421 semantically no reason for the attribute. */
3422 if (is_in_common == 1 && tmp_sym->attr.is_bind_c == 1)
3424 gfc_error ("Variable '%s' in common block '%s' at "
3425 "%L cannot be declared with BIND(C) "
3426 "since it is not a global",
3427 tmp_sym->name, com_block->name,
3428 &(tmp_sym->declared_at));
3432 /* Scalar variables that are bind(c) can not have the pointer
3433 or allocatable attributes. */
3434 if (tmp_sym->attr.is_bind_c == 1)
3436 if (tmp_sym->attr.pointer == 1)
3438 gfc_error ("Variable '%s' at %L cannot have both the "
3439 "POINTER and BIND(C) attributes",
3440 tmp_sym->name, &(tmp_sym->declared_at));
3444 if (tmp_sym->attr.allocatable == 1)
3446 gfc_error ("Variable '%s' at %L cannot have both the "
3447 "ALLOCATABLE and BIND(C) attributes",
3448 tmp_sym->name, &(tmp_sym->declared_at));
3454 /* If it is a BIND(C) function, make sure the return value is a
3455 scalar value. The previous tests in this function made sure
3456 the type is interoperable. */
3457 if (bind_c_function && tmp_sym->as != NULL)
3458 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3459 "be an array", tmp_sym->name, &(tmp_sym->declared_at));
3461 /* BIND(C) functions can not return a character string. */
3462 if (bind_c_function && tmp_sym->ts.type == BT_CHARACTER)
3463 if (tmp_sym->ts.cl == NULL || tmp_sym->ts.cl->length == NULL
3464 || tmp_sym->ts.cl->length->expr_type != EXPR_CONSTANT
3465 || mpz_cmp_si (tmp_sym->ts.cl->length->value.integer, 1) != 0)
3466 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3467 "be a character string", tmp_sym->name,
3468 &(tmp_sym->declared_at));
3471 /* See if the symbol has been marked as private. If it has, make sure
3472 there is no binding label and warn the user if there is one. */
3473 if (tmp_sym->attr.access == ACCESS_PRIVATE
3474 && tmp_sym->binding_label[0] != '\0')
3475 /* Use gfc_warning_now because we won't say that the symbol fails
3476 just because of this. */
3477 gfc_warning_now ("Symbol '%s' at %L is marked PRIVATE but has been "
3478 "given the binding label '%s'", tmp_sym->name,
3479 &(tmp_sym->declared_at), tmp_sym->binding_label);
3485 /* Set the appropriate fields for a symbol that's been declared as
3486 BIND(C) (the is_bind_c flag and the binding label), and verify that
3487 the type is C interoperable. Errors are reported by the functions
3488 used to set/test these fields. */
3491 set_verify_bind_c_sym (gfc_symbol *tmp_sym, int num_idents)
3493 gfc_try retval = SUCCESS;
3495 /* TODO: Do we need to make sure the vars aren't marked private? */
3497 /* Set the is_bind_c bit in symbol_attribute. */
3498 gfc_add_is_bind_c (&(tmp_sym->attr), tmp_sym->name, &gfc_current_locus, 0);
3500 if (set_binding_label (tmp_sym->binding_label, tmp_sym->name,
3501 num_idents) != SUCCESS)
3508 /* Set the fields marking the given common block as BIND(C), including
3509 a binding label, and report any errors encountered. */
3512 set_verify_bind_c_com_block (gfc_common_head *com_block, int num_idents)
3514 gfc_try retval = SUCCESS;
3516 /* destLabel, common name, typespec (which may have binding label). */
3517 if (set_binding_label (com_block->binding_label, com_block->name, num_idents)
3521 /* Set the given common block (com_block) to being bind(c) (1). */
3522 set_com_block_bind_c (com_block, 1);
3528 /* Retrieve the list of one or more identifiers that the given bind(c)
3529 attribute applies to. */
3532 get_bind_c_idents (void)
3534 char name[GFC_MAX_SYMBOL_LEN + 1];
3536 gfc_symbol *tmp_sym = NULL;
3538 gfc_common_head *com_block = NULL;
3540 if (gfc_match_name (name) == MATCH_YES)
3542 found_id = MATCH_YES;
3543 gfc_get_ha_symbol (name, &tmp_sym);
3545 else if (match_common_name (name) == MATCH_YES)
3547 found_id = MATCH_YES;
3548 com_block = gfc_get_common (name, 0);
3552 gfc_error ("Need either entity or common block name for "
3553 "attribute specification statement at %C");
3557 /* Save the current identifier and look for more. */
3560 /* Increment the number of identifiers found for this spec stmt. */
3563 /* Make sure we have a sym or com block, and verify that it can
3564 be bind(c). Set the appropriate field(s) and look for more
3566 if (tmp_sym != NULL || com_block != NULL)
3568 if (tmp_sym != NULL)
3570 if (set_verify_bind_c_sym (tmp_sym, num_idents)
3576 if (set_verify_bind_c_com_block(com_block, num_idents)
3581 /* Look to see if we have another identifier. */
3583 if (gfc_match_eos () == MATCH_YES)
3584 found_id = MATCH_NO;
3585 else if (gfc_match_char (',') != MATCH_YES)
3586 found_id = MATCH_NO;
3587 else if (gfc_match_name (name) == MATCH_YES)
3589 found_id = MATCH_YES;
3590 gfc_get_ha_symbol (name, &tmp_sym);
3592 else if (match_common_name (name) == MATCH_YES)
3594 found_id = MATCH_YES;
3595 com_block = gfc_get_common (name, 0);
3599 gfc_error ("Missing entity or common block name for "
3600 "attribute specification statement at %C");
3606 gfc_internal_error ("Missing symbol");
3608 } while (found_id == MATCH_YES);
3610 /* if we get here we were successful */
3615 /* Try and match a BIND(C) attribute specification statement. */
3618 gfc_match_bind_c_stmt (void)
3620 match found_match = MATCH_NO;
3625 /* This may not be necessary. */
3627 /* Clear the temporary binding label holder. */
3628 curr_binding_label[0] = '\0';
3630 /* Look for the bind(c). */
3631 found_match = gfc_match_bind_c (NULL, true);
3633 if (found_match == MATCH_YES)
3635 /* Look for the :: now, but it is not required. */
3638 /* Get the identifier(s) that needs to be updated. This may need to
3639 change to hand the flag(s) for the attr specified so all identifiers
3640 found can have all appropriate parts updated (assuming that the same
3641 spec stmt can have multiple attrs, such as both bind(c) and
3643 if (get_bind_c_idents () != SUCCESS)
3644 /* Error message should have printed already. */
3652 /* Match a data declaration statement. */
3655 gfc_match_data_decl (void)
3661 num_idents_on_line = 0;
3663 m = gfc_match_type_spec (¤t_ts, 0);
3667 if (current_ts.type == BT_DERIVED && gfc_current_state () != COMP_DERIVED)
3669 sym = gfc_use_derived (current_ts.derived);
3677 current_ts.derived = sym;
3680 m = match_attr_spec ();
3681 if (m == MATCH_ERROR)
3687 if (current_ts.type == BT_DERIVED && current_ts.derived->components == NULL
3688 && !current_ts.derived->attr.zero_comp)
3691 if (current_attr.pointer && gfc_current_state () == COMP_DERIVED)
3694 gfc_find_symbol (current_ts.derived->name,
3695 current_ts.derived->ns->parent, 1, &sym);
3697 /* Any symbol that we find had better be a type definition
3698 which has its components defined. */
3699 if (sym != NULL && sym->attr.flavor == FL_DERIVED
3700 && (current_ts.derived->components != NULL
3701 || current_ts.derived->attr.zero_comp))
3704 /* Now we have an error, which we signal, and then fix up
3705 because the knock-on is plain and simple confusing. */
3706 gfc_error_now ("Derived type at %C has not been previously defined "
3707 "and so cannot appear in a derived type definition");
3708 current_attr.pointer = 1;
3713 /* If we have an old-style character declaration, and no new-style
3714 attribute specifications, then there a comma is optional between
3715 the type specification and the variable list. */
3716 if (m == MATCH_NO && current_ts.type == BT_CHARACTER && old_char_selector)
3717 gfc_match_char (',');
3719 /* Give the types/attributes to symbols that follow. Give the element
3720 a number so that repeat character length expressions can be copied. */
3724 num_idents_on_line++;
3725 m = variable_decl (elem++);
3726 if (m == MATCH_ERROR)
3731 if (gfc_match_eos () == MATCH_YES)
3733 if (gfc_match_char (',') != MATCH_YES)
3737 if (gfc_error_flag_test () == 0)
3738 gfc_error ("Syntax error in data declaration at %C");
3741 gfc_free_data_all (gfc_current_ns);
3744 gfc_free_array_spec (current_as);
3750 /* Match a prefix associated with a function or subroutine
3751 declaration. If the typespec pointer is nonnull, then a typespec
3752 can be matched. Note that if nothing matches, MATCH_YES is
3753 returned (the null string was matched). */
3756 gfc_match_prefix (gfc_typespec *ts)
3760 gfc_clear_attr (¤t_attr);
3763 gcc_assert (!gfc_matching_prefix);
3764 gfc_matching_prefix = true;
3767 if (!seen_type && ts != NULL
3768 && gfc_match_type_spec (ts, 0) == MATCH_YES
3769 && gfc_match_space () == MATCH_YES)
3776 if (gfc_match ("elemental% ") == MATCH_YES)
3778 if (gfc_add_elemental (¤t_attr, NULL) == FAILURE)
3784 if (gfc_match ("pure% ") == MATCH_YES)
3786 if (gfc_add_pure (¤t_attr, NULL) == FAILURE)
3792 if (gfc_match ("recursive% ") == MATCH_YES)
3794 if (gfc_add_recursive (¤t_attr, NULL) == FAILURE)
3800 /* At this point, the next item is not a prefix. */
3801 gcc_assert (gfc_matching_prefix);
3802 gfc_matching_prefix = false;
3806 gcc_assert (gfc_matching_prefix);
3807 gfc_matching_prefix = false;
3812 /* Copy attributes matched by gfc_match_prefix() to attributes on a symbol. */
3815 copy_prefix (symbol_attribute *dest, locus *where)
3817 if (current_attr.pure && gfc_add_pure (dest, where) == FAILURE)
3820 if (current_attr.elemental && gfc_add_elemental (dest, where) == FAILURE)
3823 if (current_attr.recursive && gfc_add_recursive (dest, where) == FAILURE)
3830 /* Match a formal argument list. */
3833 gfc_match_formal_arglist (gfc_symbol *progname, int st_flag, int null_flag)
3835 gfc_formal_arglist *head, *tail, *p, *q;
3836 char name[GFC_MAX_SYMBOL_LEN + 1];
3842 if (gfc_match_char ('(') != MATCH_YES)
3849 if (gfc_match_char (')') == MATCH_YES)
3854 if (gfc_match_char ('*') == MATCH_YES)
3858 m = gfc_match_name (name);
3862 if (gfc_get_symbol (name, NULL, &sym))
3866 p = gfc_get_formal_arglist ();
3878 /* We don't add the VARIABLE flavor because the name could be a
3879 dummy procedure. We don't apply these attributes to formal
3880 arguments of statement functions. */
3881 if (sym != NULL && !st_flag
3882 && (gfc_add_dummy (&sym->attr, sym->name, NULL) == FAILURE
3883 || gfc_missing_attr (&sym->attr, NULL) == FAILURE))
3889 /* The name of a program unit can be in a different namespace,
3890 so check for it explicitly. After the statement is accepted,
3891 the name is checked for especially in gfc_get_symbol(). */
3892 if (gfc_new_block != NULL && sym != NULL
3893 && strcmp (sym->name, gfc_new_block->name) == 0)
3895 gfc_error ("Name '%s' at %C is the name of the procedure",
3901 if (gfc_match_char (')') == MATCH_YES)
3904 m = gfc_match_char (',');
3907 gfc_error ("Unexpected junk in formal argument list at %C");
3913 /* Check for duplicate symbols in the formal argument list. */
3916 for (p = head; p->next; p = p->next)
3921 for (q = p->next; q; q = q->next)
3922 if (p->sym == q->sym)
3924 gfc_error ("Duplicate symbol '%s' in formal argument list "
3925 "at %C", p->sym->name);
3933 if (gfc_add_explicit_interface (progname, IFSRC_DECL, head, NULL)
3943 gfc_free_formal_arglist (head);
3948 /* Match a RESULT specification following a function declaration or
3949 ENTRY statement. Also matches the end-of-statement. */
3952 match_result (gfc_symbol *function, gfc_symbol **result)
3954 char name[GFC_MAX_SYMBOL_LEN + 1];
3958 if (gfc_match (" result (") != MATCH_YES)
3961 m = gfc_match_name (name);
3965 /* Get the right paren, and that's it because there could be the
3966 bind(c) attribute after the result clause. */
3967 if (gfc_match_char(')') != MATCH_YES)
3969 /* TODO: should report the missing right paren here. */
3973 if (strcmp (function->name, name) == 0)
3975 gfc_error ("RESULT variable at %C must be different than function name");
3979 if (gfc_get_symbol (name, NULL, &r))
3982 if (gfc_add_result (&r->attr, r->name, NULL) == FAILURE)
3991 /* Match a function suffix, which could be a combination of a result
3992 clause and BIND(C), either one, or neither. The draft does not
3993 require them to come in a specific order. */
3996 gfc_match_suffix (gfc_symbol *sym, gfc_symbol **result)
3998 match is_bind_c; /* Found bind(c). */
3999 match is_result; /* Found result clause. */
4000 match found_match; /* Status of whether we've found a good match. */
4001 char peek_char; /* Character we're going to peek at. */
4002 bool allow_binding_name;
4004 /* Initialize to having found nothing. */
4005 found_match = MATCH_NO;
4006 is_bind_c = MATCH_NO;
4007 is_result = MATCH_NO;
4009 /* Get the next char to narrow between result and bind(c). */
4010 gfc_gobble_whitespace ();
4011 peek_char = gfc_peek_ascii_char ();
4013 /* C binding names are not allowed for internal procedures. */
4014 if (gfc_current_state () == COMP_CONTAINS
4015 && sym->ns->proc_name->attr.flavor != FL_MODULE)
4016 allow_binding_name = false;
4018 allow_binding_name = true;
4023 /* Look for result clause. */
4024 is_result = match_result (sym, result);
4025 if (is_result == MATCH_YES)
4027 /* Now see if there is a bind(c) after it. */
4028 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
4029 /* We've found the result clause and possibly bind(c). */
4030 found_match = MATCH_YES;
4033 /* This should only be MATCH_ERROR. */
4034 found_match = is_result;
4037 /* Look for bind(c) first. */
4038 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
4039 if (is_bind_c == MATCH_YES)
4041 /* Now see if a result clause followed it. */
4042 is_result = match_result (sym, result);
4043 found_match = MATCH_YES;
4047 /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */
4048 found_match = MATCH_ERROR;
4052 gfc_error ("Unexpected junk after function declaration at %C");
4053 found_match = MATCH_ERROR;
4057 if (is_bind_c == MATCH_YES)
4059 /* Fortran 2008 draft allows BIND(C) for internal procedures. */
4060 if (gfc_current_state () == COMP_CONTAINS
4061 && sym->ns->proc_name->attr.flavor != FL_MODULE
4062 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute "
4063 "at %L may not be specified for an internal "
4064 "procedure", &gfc_current_locus)
4068 if (gfc_add_is_bind_c (&(sym->attr), sym->name, &gfc_current_locus, 1)
4077 /* Procedure pointer return value without RESULT statement:
4078 Add "hidden" result variable named "ppr@". */
4081 add_hidden_procptr_result (gfc_symbol *sym)
4085 if (gfc_notification_std (GFC_STD_F2003) == ERROR)
4088 /* First usage case: PROCEDURE and EXTERNAL statements. */
4089 case1 = gfc_current_state () == COMP_FUNCTION && gfc_current_block ()
4090 && strcmp (gfc_current_block ()->name, sym->name) == 0
4091 && sym->attr.external;
4092 /* Second usage case: INTERFACE statements. */
4093 case2 = gfc_current_state () == COMP_INTERFACE && gfc_state_stack->previous
4094 && gfc_state_stack->previous->state == COMP_FUNCTION
4095 && strcmp (gfc_state_stack->previous->sym->name, sym->name) == 0;
4101 gfc_get_sym_tree ("ppr@", gfc_current_ns, &stree, false);
4105 gfc_get_sym_tree ("ppr@", gfc_current_ns->parent, &stree, false);
4106 st2 = gfc_new_symtree (&gfc_current_ns->sym_root, "ppr@");
4107 st2->n.sym = stree->n.sym;
4109 sym->result = stree->n.sym;
4111 sym->result->attr.proc_pointer = sym->attr.proc_pointer;
4112 sym->result->attr.pointer = sym->attr.pointer;
4113 sym->result->attr.external = sym->attr.external;
4114 sym->result->attr.referenced = sym->attr.referenced;
4115 sym->result->ts = sym->ts;
4116 sym->attr.proc_pointer = 0;
4117 sym->attr.pointer = 0;
4118 sym->attr.external = 0;
4119 if (sym->result->attr.external && sym->result->attr.pointer)
4121 sym->result->attr.pointer = 0;
4122 sym->result->attr.proc_pointer = 1;
4125 return gfc_add_result (&sym->result->attr, sym->result->name, NULL);
4127 /* POINTER after PROCEDURE/EXTERNAL/INTERFACE statement. */
4128 else if (sym->attr.function && !sym->attr.external && sym->attr.pointer
4129 && sym->result && sym->result != sym && sym->result->attr.external
4130 && sym == gfc_current_ns->proc_name
4131 && sym == sym->result->ns->proc_name
4132 && strcmp ("ppr@", sym->result->name) == 0)
4134 sym->result->attr.proc_pointer = 1;
4135 sym->attr.pointer = 0;
4143 /* Match the interface for a PROCEDURE declaration,
4144 including brackets (R1212). */
4147 match_procedure_interface (gfc_symbol **proc_if)
4151 locus old_loc, entry_loc;
4152 gfc_namespace *old_ns = gfc_current_ns;
4153 char name[GFC_MAX_SYMBOL_LEN + 1];
4155 old_loc = entry_loc = gfc_current_locus;
4156 gfc_clear_ts (¤t_ts);
4158 if (gfc_match (" (") != MATCH_YES)
4160 gfc_current_locus = entry_loc;
4164 /* Get the type spec. for the procedure interface. */
4165 old_loc = gfc_current_locus;
4166 m = gfc_match_type_spec (¤t_ts, 0);
4167 gfc_gobble_whitespace ();
4168 if (m == MATCH_YES || (m == MATCH_NO && gfc_peek_ascii_char () == ')'))
4171 if (m == MATCH_ERROR)
4174 /* Procedure interface is itself a procedure. */
4175 gfc_current_locus = old_loc;
4176 m = gfc_match_name (name);
4178 /* First look to see if it is already accessible in the current
4179 namespace because it is use associated or contained. */
4181 if (gfc_find_sym_tree (name, NULL, 0, &st))
4184 /* If it is still not found, then try the parent namespace, if it
4185 exists and create the symbol there if it is still not found. */
4186 if (gfc_current_ns->parent)
4187 gfc_current_ns = gfc_current_ns->parent;
4188 if (st == NULL && gfc_get_ha_sym_tree (name, &st))
4191 gfc_current_ns = old_ns;
4192 *proc_if = st->n.sym;
4194 /* Various interface checks. */
4198 /* Resolve interface if possible. That way, attr.procedure is only set
4199 if it is declared by a later procedure-declaration-stmt, which is
4200 invalid per C1212. */
4201 while ((*proc_if)->ts.interface)
4202 *proc_if = (*proc_if)->ts.interface;
4204 if ((*proc_if)->generic)
4206 gfc_error ("Interface '%s' at %C may not be generic",
4210 if ((*proc_if)->attr.proc == PROC_ST_FUNCTION)
4212 gfc_error ("Interface '%s' at %C may not be a statement function",
4216 /* Handle intrinsic procedures. */
4217 if (!((*proc_if)->attr.external || (*proc_if)->attr.use_assoc
4218 || (*proc_if)->attr.if_source == IFSRC_IFBODY)
4219 && (gfc_is_intrinsic ((*proc_if), 0, gfc_current_locus)
4220 || gfc_is_intrinsic ((*proc_if), 1, gfc_current_locus)))
4221 (*proc_if)->attr.intrinsic = 1;
4222 if ((*proc_if)->attr.intrinsic
4223 && !gfc_intrinsic_actual_ok ((*proc_if)->name, 0))
4225 gfc_error ("Intrinsic procedure '%s' not allowed "
4226 "in PROCEDURE statement at %C", (*proc_if)->name);
4232 if (gfc_match (" )") != MATCH_YES)
4234 gfc_current_locus = entry_loc;
4242 /* Match a PROCEDURE declaration (R1211). */
4245 match_procedure_decl (void)
4248 gfc_symbol *sym, *proc_if = NULL;
4250 gfc_expr *initializer = NULL;
4252 /* Parse interface (with brackets). */
4253 m = match_procedure_interface (&proc_if);
4257 /* Parse attributes (with colons). */
4258 m = match_attr_spec();
4259 if (m == MATCH_ERROR)
4262 /* Get procedure symbols. */
4265 m = gfc_match_symbol (&sym, 0);
4268 else if (m == MATCH_ERROR)
4271 /* Add current_attr to the symbol attributes. */
4272 if (gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE)
4275 if (sym->attr.is_bind_c)
4277 /* Check for C1218. */
4278 if (!proc_if || !proc_if->attr.is_bind_c)
4280 gfc_error ("BIND(C) attribute at %C requires "
4281 "an interface with BIND(C)");
4284 /* Check for C1217. */
4285 if (has_name_equals && sym->attr.pointer)
4287 gfc_error ("BIND(C) procedure with NAME may not have "
4288 "POINTER attribute at %C");
4291 if (has_name_equals && sym->attr.dummy)
4293 gfc_error ("Dummy procedure at %C may not have "
4294 "BIND(C) attribute with NAME");
4297 /* Set binding label for BIND(C). */
4298 if (set_binding_label (sym->binding_label, sym->name, num) != SUCCESS)
4302 if (gfc_add_external (&sym->attr, NULL) == FAILURE)
4305 if (add_hidden_procptr_result (sym) == SUCCESS)
4308 if (gfc_add_proc (&sym->attr, sym->name, NULL) == FAILURE)
4311 /* Set interface. */
4312 if (proc_if != NULL)
4314 if (sym->ts.type != BT_UNKNOWN)
4316 gfc_error ("Procedure '%s' at %L already has basic type of %s",
4317 sym->name, &gfc_current_locus,
4318 gfc_basic_typename (sym->ts.type));
4321 sym->ts.interface = proc_if;
4322 sym->attr.untyped = 1;
4323 sym->attr.if_source = IFSRC_IFBODY;
4325 else if (current_ts.type != BT_UNKNOWN)
4327 if (gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE)
4329 sym->ts.interface = gfc_new_symbol ("", gfc_current_ns);
4330 sym->ts.interface->ts = current_ts;
4331 sym->ts.interface->attr.function = 1;
4332 sym->attr.function = sym->ts.interface->attr.function;
4333 sym->attr.if_source = IFSRC_UNKNOWN;
4336 if (gfc_match (" =>") == MATCH_YES)
4338 if (!current_attr.pointer)
4340 gfc_error ("Initialization at %C isn't for a pointer variable");
4345 m = gfc_match_null (&initializer);
4348 gfc_error ("Pointer initialization requires a NULL() at %C");
4352 if (gfc_pure (NULL))
4354 gfc_error ("Initialization of pointer at %C is not allowed in "
4355 "a PURE procedure");
4362 if (add_init_expr_to_sym (sym->name, &initializer, &gfc_current_locus)
4368 gfc_set_sym_referenced (sym);
4370 if (gfc_match_eos () == MATCH_YES)
4372 if (gfc_match_char (',') != MATCH_YES)
4377 gfc_error ("Syntax error in PROCEDURE statement at %C");
4381 /* Free stuff up and return. */
4382 gfc_free_expr (initializer);
4388 match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc);
4391 /* Match a procedure pointer component declaration (R445). */
4394 match_ppc_decl (void)
4397 gfc_symbol *proc_if = NULL;
4401 gfc_expr *initializer = NULL;
4402 gfc_typebound_proc* tb;
4403 char name[GFC_MAX_SYMBOL_LEN + 1];
4405 /* Parse interface (with brackets). */
4406 m = match_procedure_interface (&proc_if);
4410 /* Parse attributes. */
4411 tb = XCNEW (gfc_typebound_proc);
4412 tb->where = gfc_current_locus;
4413 m = match_binding_attributes (tb, false, true);
4414 if (m == MATCH_ERROR)
4417 gfc_clear_attr (¤t_attr);
4418 current_attr.procedure = 1;
4419 current_attr.proc_pointer = 1;
4420 current_attr.access = tb->access;
4421 current_attr.flavor = FL_PROCEDURE;
4423 /* Match the colons (required). */
4424 if (gfc_match (" ::") != MATCH_YES)
4426 gfc_error ("Expected '::' after binding-attributes at %C");
4430 /* Check for C450. */
4431 if (!tb->nopass && proc_if == NULL)
4433 gfc_error("NOPASS or explicit interface required at %C");
4437 /* Match PPC names. */
4441 m = gfc_match_name (name);
4444 else if (m == MATCH_ERROR)
4447 if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE)
4450 /* Add current_attr to the symbol attributes. */
4451 if (gfc_copy_attr (&c->attr, ¤t_attr, NULL) == FAILURE)
4454 if (gfc_add_external (&c->attr, NULL) == FAILURE)
4457 if (gfc_add_proc (&c->attr, name, NULL) == FAILURE)
4462 /* Set interface. */
4463 if (proc_if != NULL)
4465 c->ts.interface = proc_if;
4466 c->attr.untyped = 1;
4467 c->attr.if_source = IFSRC_IFBODY;
4469 else if (ts.type != BT_UNKNOWN)
4472 c->ts.interface = gfc_new_symbol ("", gfc_current_ns);
4473 c->ts.interface->ts = ts;
4474 c->ts.interface->attr.function = 1;
4475 c->attr.function = c->ts.interface->attr.function;
4476 c->attr.if_source = IFSRC_UNKNOWN;
4479 if (gfc_match (" =>") == MATCH_YES)
4481 m = gfc_match_null (&initializer);
4484 gfc_error ("Pointer initialization requires a NULL() at %C");
4487 if (gfc_pure (NULL))
4489 gfc_error ("Initialization of pointer at %C is not allowed in "
4490 "a PURE procedure");
4495 gfc_free_expr (initializer);
4498 c->initializer = initializer;
4501 if (gfc_match_eos () == MATCH_YES)
4503 if (gfc_match_char (',') != MATCH_YES)
4508 gfc_error ("Syntax error in procedure pointer component at %C");
4513 /* Match a PROCEDURE declaration inside an interface (R1206). */
4516 match_procedure_in_interface (void)
4520 char name[GFC_MAX_SYMBOL_LEN + 1];
4522 if (current_interface.type == INTERFACE_NAMELESS
4523 || current_interface.type == INTERFACE_ABSTRACT)
4525 gfc_error ("PROCEDURE at %C must be in a generic interface");
4531 m = gfc_match_name (name);
4534 else if (m == MATCH_ERROR)
4536 if (gfc_get_symbol (name, gfc_current_ns->parent, &sym))
4539 if (gfc_add_interface (sym) == FAILURE)
4542 if (gfc_match_eos () == MATCH_YES)
4544 if (gfc_match_char (',') != MATCH_YES)
4551 gfc_error ("Syntax error in PROCEDURE statement at %C");
4556 /* General matcher for PROCEDURE declarations. */
4558 static match match_procedure_in_type (void);
4561 gfc_match_procedure (void)
4565 switch (gfc_current_state ())
4570 case COMP_SUBROUTINE:
4572 m = match_procedure_decl ();
4574 case COMP_INTERFACE:
4575 m = match_procedure_in_interface ();
4578 m = match_ppc_decl ();
4580 case COMP_DERIVED_CONTAINS:
4581 m = match_procedure_in_type ();
4590 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROCEDURE statement at %C")
4598 /* Warn if a matched procedure has the same name as an intrinsic; this is
4599 simply a wrapper around gfc_warn_intrinsic_shadow that interprets the current
4600 parser-state-stack to find out whether we're in a module. */
4603 warn_intrinsic_shadow (const gfc_symbol* sym, bool func)
4607 in_module = (gfc_state_stack->previous
4608 && gfc_state_stack->previous->state == COMP_MODULE);
4610 gfc_warn_intrinsic_shadow (sym, in_module, func);
4614 /* Match a function declaration. */
4617 gfc_match_function_decl (void)
4619 char name[GFC_MAX_SYMBOL_LEN + 1];
4620 gfc_symbol *sym, *result;
4624 match found_match; /* Status returned by match func. */
4626 if (gfc_current_state () != COMP_NONE
4627 && gfc_current_state () != COMP_INTERFACE
4628 && gfc_current_state () != COMP_CONTAINS)
4631 gfc_clear_ts (¤t_ts);
4633 old_loc = gfc_current_locus;
4635 m = gfc_match_prefix (¤t_ts);
4638 gfc_current_locus = old_loc;
4642 if (gfc_match ("function% %n", name) != MATCH_YES)
4644 gfc_current_locus = old_loc;
4647 if (get_proc_name (name, &sym, false))
4650 if (add_hidden_procptr_result (sym) == SUCCESS)
4653 gfc_new_block = sym;
4655 m = gfc_match_formal_arglist (sym, 0, 0);
4658 gfc_error ("Expected formal argument list in function "
4659 "definition at %C");
4663 else if (m == MATCH_ERROR)
4668 /* According to the draft, the bind(c) and result clause can
4669 come in either order after the formal_arg_list (i.e., either
4670 can be first, both can exist together or by themselves or neither
4671 one). Therefore, the match_result can't match the end of the
4672 string, and check for the bind(c) or result clause in either order. */
4673 found_match = gfc_match_eos ();
4675 /* Make sure that it isn't already declared as BIND(C). If it is, it
4676 must have been marked BIND(C) with a BIND(C) attribute and that is
4677 not allowed for procedures. */
4678 if (sym->attr.is_bind_c == 1)
4680 sym->attr.is_bind_c = 0;
4681 if (sym->old_symbol != NULL)
4682 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4683 "variables or common blocks",
4684 &(sym->old_symbol->declared_at));
4686 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4687 "variables or common blocks", &gfc_current_locus);
4690 if (found_match != MATCH_YES)
4692 /* If we haven't found the end-of-statement, look for a suffix. */
4693 suffix_match = gfc_match_suffix (sym, &result);
4694 if (suffix_match == MATCH_YES)
4695 /* Need to get the eos now. */
4696 found_match = gfc_match_eos ();
4698 found_match = suffix_match;
4701 if(found_match != MATCH_YES)
4705 /* Make changes to the symbol. */
4708 if (gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE)
4711 if (gfc_missing_attr (&sym->attr, NULL) == FAILURE
4712 || copy_prefix (&sym->attr, &sym->declared_at) == FAILURE)
4715 /* Delay matching the function characteristics until after the
4716 specification block by signalling kind=-1. */
4717 sym->declared_at = old_loc;
4718 if (current_ts.type != BT_UNKNOWN)
4719 current_ts.kind = -1;
4721 current_ts.kind = 0;
4725 if (current_ts.type != BT_UNKNOWN
4726 && gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE)
4732 if (current_ts.type != BT_UNKNOWN
4733 && gfc_add_type (result, ¤t_ts, &gfc_current_locus)
4736 sym->result = result;
4739 /* Warn if this procedure has the same name as an intrinsic. */
4740 warn_intrinsic_shadow (sym, true);
4746 gfc_current_locus = old_loc;
4751 /* This is mostly a copy of parse.c(add_global_procedure) but modified to
4752 pass the name of the entry, rather than the gfc_current_block name, and
4753 to return false upon finding an existing global entry. */
4756 add_global_entry (const char *name, int sub)
4759 enum gfc_symbol_type type;
4761 s = gfc_get_gsymbol(name);
4762 type = sub ? GSYM_SUBROUTINE : GSYM_FUNCTION;
4765 || (s->type != GSYM_UNKNOWN
4766 && s->type != type))
4767 gfc_global_used(s, NULL);
4771 s->where = gfc_current_locus;
4773 s->ns = gfc_current_ns;
4780 /* Match an ENTRY statement. */
4783 gfc_match_entry (void)
4788 char name[GFC_MAX_SYMBOL_LEN + 1];
4789 gfc_compile_state state;
4793 bool module_procedure;
4797 m = gfc_match_name (name);
4801 state = gfc_current_state ();
4802 if (state != COMP_SUBROUTINE && state != COMP_FUNCTION)
4807 gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM");
4810 gfc_error ("ENTRY statement at %C cannot appear within a MODULE");
4812 case COMP_BLOCK_DATA:
4813 gfc_error ("ENTRY statement at %C cannot appear within "
4816 case COMP_INTERFACE:
4817 gfc_error ("ENTRY statement at %C cannot appear within "
4821 gfc_error ("ENTRY statement at %C cannot appear within "
4822 "a DERIVED TYPE block");
4825 gfc_error ("ENTRY statement at %C cannot appear within "
4826 "an IF-THEN block");
4829 gfc_error ("ENTRY statement at %C cannot appear within "
4833 gfc_error ("ENTRY statement at %C cannot appear within "
4837 gfc_error ("ENTRY statement at %C cannot appear within "
4841 gfc_error ("ENTRY statement at %C cannot appear within "
4845 gfc_error ("ENTRY statement at %C cannot appear within "
4846 "a contained subprogram");
4849 gfc_internal_error ("gfc_match_entry(): Bad state");
4854 module_procedure = gfc_current_ns->parent != NULL
4855 && gfc_current_ns->parent->proc_name
4856 && gfc_current_ns->parent->proc_name->attr.flavor
4859 if (gfc_current_ns->parent != NULL
4860 && gfc_current_ns->parent->proc_name
4861 && !module_procedure)
4863 gfc_error("ENTRY statement at %C cannot appear in a "
4864 "contained procedure");
4868 /* Module function entries need special care in get_proc_name
4869 because previous references within the function will have
4870 created symbols attached to the current namespace. */
4871 if (get_proc_name (name, &entry,
4872 gfc_current_ns->parent != NULL
4873 && module_procedure))
4876 proc = gfc_current_block ();
4878 /* Make sure that it isn't already declared as BIND(C). If it is, it
4879 must have been marked BIND(C) with a BIND(C) attribute and that is
4880 not allowed for procedures. */
4881 if (entry->attr.is_bind_c == 1)
4883 entry->attr.is_bind_c = 0;
4884 if (entry->old_symbol != NULL)
4885 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4886 "variables or common blocks",
4887 &(entry->old_symbol->declared_at));
4889 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4890 "variables or common blocks", &gfc_current_locus);
4893 /* Check what next non-whitespace character is so we can tell if there
4894 is the required parens if we have a BIND(C). */
4895 gfc_gobble_whitespace ();
4896 peek_char = gfc_peek_ascii_char ();
4898 if (state == COMP_SUBROUTINE)
4900 /* An entry in a subroutine. */
4901 if (!gfc_current_ns->parent && !add_global_entry (name, 1))
4904 m = gfc_match_formal_arglist (entry, 0, 1);
4908 /* Call gfc_match_bind_c with allow_binding_name = true as ENTRY can
4909 never be an internal procedure. */
4910 is_bind_c = gfc_match_bind_c (entry, true);
4911 if (is_bind_c == MATCH_ERROR)
4913 if (is_bind_c == MATCH_YES)
4915 if (peek_char != '(')
4917 gfc_error ("Missing required parentheses before BIND(C) at %C");
4920 if (gfc_add_is_bind_c (&(entry->attr), entry->name, &(entry->declared_at), 1)
4925 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
4926 || gfc_add_subroutine (&entry->attr, entry->name, NULL) == FAILURE)
4931 /* An entry in a function.
4932 We need to take special care because writing
4937 ENTRY f() RESULT (r)
4939 ENTRY f RESULT (r). */
4940 if (!gfc_current_ns->parent && !add_global_entry (name, 0))
4943 old_loc = gfc_current_locus;
4944 if (gfc_match_eos () == MATCH_YES)
4946 gfc_current_locus = old_loc;
4947 /* Match the empty argument list, and add the interface to
4949 m = gfc_match_formal_arglist (entry, 0, 1);
4952 m = gfc_match_formal_arglist (entry, 0, 0);
4959 if (gfc_match_eos () == MATCH_YES)
4961 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
4962 || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE)
4965 entry->result = entry;
4969 m = gfc_match_suffix (entry, &result);
4971 gfc_syntax_error (ST_ENTRY);
4977 if (gfc_add_result (&result->attr, result->name, NULL) == FAILURE
4978 || gfc_add_entry (&entry->attr, result->name, NULL) == FAILURE
4979 || gfc_add_function (&entry->attr, result->name, NULL)
4982 entry->result = result;
4986 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
4987 || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE)
4989 entry->result = entry;
4994 if (gfc_match_eos () != MATCH_YES)
4996 gfc_syntax_error (ST_ENTRY);
5000 entry->attr.recursive = proc->attr.recursive;
5001 entry->attr.elemental = proc->attr.elemental;
5002 entry->attr.pure = proc->attr.pure;
5004 el = gfc_get_entry_list ();
5006 el->next = gfc_current_ns->entries;
5007 gfc_current_ns->entries = el;
5009 el->id = el->next->id + 1;
5013 new_st.op = EXEC_ENTRY;
5014 new_st.ext.entry = el;
5020 /* Match a subroutine statement, including optional prefixes. */
5023 gfc_match_subroutine (void)
5025 char name[GFC_MAX_SYMBOL_LEN + 1];
5030 bool allow_binding_name;
5032 if (gfc_current_state () != COMP_NONE
5033 && gfc_current_state () != COMP_INTERFACE
5034 && gfc_current_state () != COMP_CONTAINS)
5037 m = gfc_match_prefix (NULL);
5041 m = gfc_match ("subroutine% %n", name);
5045 if (get_proc_name (name, &sym, false))
5048 if (add_hidden_procptr_result (sym) == SUCCESS)
5051 gfc_new_block = sym;
5053 /* Check what next non-whitespace character is so we can tell if there
5054 is the required parens if we have a BIND(C). */
5055 gfc_gobble_whitespace ();
5056 peek_char = gfc_peek_ascii_char ();
5058 if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE)
5061 if (gfc_match_formal_arglist (sym, 0, 1) != MATCH_YES)
5064 /* Make sure that it isn't already declared as BIND(C). If it is, it
5065 must have been marked BIND(C) with a BIND(C) attribute and that is
5066 not allowed for procedures. */
5067 if (sym->attr.is_bind_c == 1)
5069 sym->attr.is_bind_c = 0;
5070 if (sym->old_symbol != NULL)
5071 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5072 "variables or common blocks",
5073 &(sym->old_symbol->declared_at));
5075 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5076 "variables or common blocks", &gfc_current_locus);
5079 /* C binding names are not allowed for internal procedures. */
5080 if (gfc_current_state () == COMP_CONTAINS
5081 && sym->ns->proc_name->attr.flavor != FL_MODULE)
5082 allow_binding_name = false;
5084 allow_binding_name = true;
5086 /* Here, we are just checking if it has the bind(c) attribute, and if
5087 so, then we need to make sure it's all correct. If it doesn't,
5088 we still need to continue matching the rest of the subroutine line. */
5089 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
5090 if (is_bind_c == MATCH_ERROR)
5092 /* There was an attempt at the bind(c), but it was wrong. An
5093 error message should have been printed w/in the gfc_match_bind_c
5094 so here we'll just return the MATCH_ERROR. */
5098 if (is_bind_c == MATCH_YES)
5100 /* The following is allowed in the Fortran 2008 draft. */
5101 if (gfc_current_state () == COMP_CONTAINS
5102 && sym->ns->proc_name->attr.flavor != FL_MODULE
5103 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute "
5104 "at %L may not be specified for an internal "
5105 "procedure", &gfc_current_locus)
5109 if (peek_char != '(')
5111 gfc_error ("Missing required parentheses before BIND(C) at %C");
5114 if (gfc_add_is_bind_c (&(sym->attr), sym->name, &(sym->declared_at), 1)
5119 if (gfc_match_eos () != MATCH_YES)
5121 gfc_syntax_error (ST_SUBROUTINE);
5125 if (copy_prefix (&sym->attr, &sym->declared_at) == FAILURE)
5128 /* Warn if it has the same name as an intrinsic. */
5129 warn_intrinsic_shadow (sym, false);
5135 /* Match a BIND(C) specifier, with the optional 'name=' specifier if
5136 given, and set the binding label in either the given symbol (if not
5137 NULL), or in the current_ts. The symbol may be NULL because we may
5138 encounter the BIND(C) before the declaration itself. Return
5139 MATCH_NO if what we're looking at isn't a BIND(C) specifier,
5140 MATCH_ERROR if it is a BIND(C) clause but an error was encountered,
5141 or MATCH_YES if the specifier was correct and the binding label and
5142 bind(c) fields were set correctly for the given symbol or the
5143 current_ts. If allow_binding_name is false, no binding name may be
5147 gfc_match_bind_c (gfc_symbol *sym, bool allow_binding_name)
5149 /* binding label, if exists */
5150 char binding_label[GFC_MAX_SYMBOL_LEN + 1];
5154 /* Initialize the flag that specifies whether we encountered a NAME=
5155 specifier or not. */
5156 has_name_equals = 0;
5158 /* Init the first char to nil so we can catch if we don't have
5159 the label (name attr) or the symbol name yet. */
5160 binding_label[0] = '\0';
5162 /* This much we have to be able to match, in this order, if
5163 there is a bind(c) label. */
5164 if (gfc_match (" bind ( c ") != MATCH_YES)
5167 /* Now see if there is a binding label, or if we've reached the
5168 end of the bind(c) attribute without one. */
5169 if (gfc_match_char (',') == MATCH_YES)
5171 if (gfc_match (" name = ") != MATCH_YES)
5173 gfc_error ("Syntax error in NAME= specifier for binding label "
5175 /* should give an error message here */
5179 has_name_equals = 1;
5181 /* Get the opening quote. */
5182 double_quote = MATCH_YES;
5183 single_quote = MATCH_YES;
5184 double_quote = gfc_match_char ('"');
5185 if (double_quote != MATCH_YES)
5186 single_quote = gfc_match_char ('\'');
5187 if (double_quote != MATCH_YES && single_quote != MATCH_YES)
5189 gfc_error ("Syntax error in NAME= specifier for binding label "
5194 /* Grab the binding label, using functions that will not lower
5195 case the names automatically. */
5196 if (gfc_match_name_C (binding_label) != MATCH_YES)
5199 /* Get the closing quotation. */
5200 if (double_quote == MATCH_YES)
5202 if (gfc_match_char ('"') != MATCH_YES)
5204 gfc_error ("Missing closing quote '\"' for binding label at %C");
5205 /* User started string with '"' so looked to match it. */
5211 if (gfc_match_char ('\'') != MATCH_YES)
5213 gfc_error ("Missing closing quote '\'' for binding label at %C");
5214 /* User started string with "'" char. */
5220 /* Get the required right paren. */
5221 if (gfc_match_char (')') != MATCH_YES)
5223 gfc_error ("Missing closing paren for binding label at %C");
5227 if (has_name_equals && !allow_binding_name)
5229 gfc_error ("No binding name is allowed in BIND(C) at %C");
5233 if (has_name_equals && sym != NULL && sym->attr.dummy)
5235 gfc_error ("For dummy procedure %s, no binding name is "
5236 "allowed in BIND(C) at %C", sym->name);
5241 /* Save the binding label to the symbol. If sym is null, we're
5242 probably matching the typespec attributes of a declaration and
5243 haven't gotten the name yet, and therefore, no symbol yet. */
5244 if (binding_label[0] != '\0')
5248 strcpy (sym->binding_label, binding_label);
5251 strcpy (curr_binding_label, binding_label);
5253 else if (allow_binding_name)
5255 /* No binding label, but if symbol isn't null, we
5256 can set the label for it here.
5257 If name="" or allow_binding_name is false, no C binding name is
5259 if (sym != NULL && sym->name != NULL && has_name_equals == 0)
5260 strncpy (sym->binding_label, sym->name, strlen (sym->name) + 1);
5263 if (has_name_equals && gfc_current_state () == COMP_INTERFACE
5264 && current_interface.type == INTERFACE_ABSTRACT)
5266 gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C");
5274 /* Return nonzero if we're currently compiling a contained procedure. */
5277 contained_procedure (void)
5279 gfc_state_data *s = gfc_state_stack;
5281 if ((s->state == COMP_SUBROUTINE || s->state == COMP_FUNCTION)
5282 && s->previous != NULL && s->previous->state == COMP_CONTAINS)
5288 /* Set the kind of each enumerator. The kind is selected such that it is
5289 interoperable with the corresponding C enumeration type, making
5290 sure that -fshort-enums is honored. */
5295 enumerator_history *current_history = NULL;
5299 if (max_enum == NULL || enum_history == NULL)
5302 if (!flag_short_enums)
5308 kind = gfc_integer_kinds[i++].kind;
5310 while (kind < gfc_c_int_kind
5311 && gfc_check_integer_range (max_enum->initializer->value.integer,
5314 current_history = enum_history;
5315 while (current_history != NULL)
5317 current_history->sym->ts.kind = kind;
5318 current_history = current_history->next;
5323 /* Match any of the various end-block statements. Returns the type of
5324 END to the caller. The END INTERFACE, END IF, END DO and END
5325 SELECT statements cannot be replaced by a single END statement. */
5328 gfc_match_end (gfc_statement *st)
5330 char name[GFC_MAX_SYMBOL_LEN + 1];
5331 gfc_compile_state state;
5333 const char *block_name;
5338 old_loc = gfc_current_locus;
5339 if (gfc_match ("end") != MATCH_YES)
5342 state = gfc_current_state ();
5343 block_name = gfc_current_block () == NULL
5344 ? NULL : gfc_current_block ()->name;
5346 if (state == COMP_CONTAINS || state == COMP_DERIVED_CONTAINS)
5348 state = gfc_state_stack->previous->state;
5349 block_name = gfc_state_stack->previous->sym == NULL
5350 ? NULL : gfc_state_stack->previous->sym->name;
5357 *st = ST_END_PROGRAM;
5358 target = " program";
5362 case COMP_SUBROUTINE:
5363 *st = ST_END_SUBROUTINE;
5364 target = " subroutine";
5365 eos_ok = !contained_procedure ();
5369 *st = ST_END_FUNCTION;
5370 target = " function";
5371 eos_ok = !contained_procedure ();
5374 case COMP_BLOCK_DATA:
5375 *st = ST_END_BLOCK_DATA;
5376 target = " block data";
5381 *st = ST_END_MODULE;
5386 case COMP_INTERFACE:
5387 *st = ST_END_INTERFACE;
5388 target = " interface";
5393 case COMP_DERIVED_CONTAINS:
5412 *st = ST_END_SELECT;
5418 *st = ST_END_FORALL;
5433 last_initializer = NULL;
5435 gfc_free_enum_history ();
5439 gfc_error ("Unexpected END statement at %C");
5443 if (gfc_match_eos () == MATCH_YES)
5447 /* We would have required END [something]. */
5448 gfc_error ("%s statement expected at %L",
5449 gfc_ascii_statement (*st), &old_loc);
5456 /* Verify that we've got the sort of end-block that we're expecting. */
5457 if (gfc_match (target) != MATCH_YES)
5459 gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st));
5463 /* If we're at the end, make sure a block name wasn't required. */
5464 if (gfc_match_eos () == MATCH_YES)
5467 if (*st != ST_ENDDO && *st != ST_ENDIF && *st != ST_END_SELECT
5468 && *st != ST_END_FORALL && *st != ST_END_WHERE)
5471 if (gfc_current_block () == NULL)
5474 gfc_error ("Expected block name of '%s' in %s statement at %C",
5475 block_name, gfc_ascii_statement (*st));
5480 /* END INTERFACE has a special handler for its several possible endings. */
5481 if (*st == ST_END_INTERFACE)
5482 return gfc_match_end_interface ();
5484 /* We haven't hit the end of statement, so what is left must be an
5486 m = gfc_match_space ();
5488 m = gfc_match_name (name);
5491 gfc_error ("Expected terminating name at %C");
5495 if (block_name == NULL)
5498 if (strcmp (name, block_name) != 0 && strcmp (block_name, "ppr@") != 0)
5500 gfc_error ("Expected label '%s' for %s statement at %C", block_name,
5501 gfc_ascii_statement (*st));
5504 /* Procedure pointer as function result. */
5505 else if (strcmp (block_name, "ppr@") == 0
5506 && strcmp (name, gfc_current_block ()->ns->proc_name->name) != 0)
5508 gfc_error ("Expected label '%s' for %s statement at %C",
5509 gfc_current_block ()->ns->proc_name->name,
5510 gfc_ascii_statement (*st));
5514 if (gfc_match_eos () == MATCH_YES)
5518 gfc_syntax_error (*st);
5521 gfc_current_locus = old_loc;
5527 /***************** Attribute declaration statements ****************/
5529 /* Set the attribute of a single variable. */
5534 char name[GFC_MAX_SYMBOL_LEN + 1];
5542 m = gfc_match_name (name);
5546 if (find_special (name, &sym, false))
5549 var_locus = gfc_current_locus;
5551 /* Deal with possible array specification for certain attributes. */
5552 if (current_attr.dimension
5553 || current_attr.allocatable
5554 || current_attr.pointer
5555 || current_attr.target)
5557 m = gfc_match_array_spec (&as);
5558 if (m == MATCH_ERROR)
5561 if (current_attr.dimension && m == MATCH_NO)
5563 gfc_error ("Missing array specification at %L in DIMENSION "
5564 "statement", &var_locus);
5569 if (current_attr.dimension && sym->value)
5571 gfc_error ("Dimensions specified for %s at %L after its "
5572 "initialisation", sym->name, &var_locus);
5577 if ((current_attr.allocatable || current_attr.pointer)
5578 && (m == MATCH_YES) && (as->type != AS_DEFERRED))
5580 gfc_error ("Array specification must be deferred at %L", &var_locus);
5586 /* Update symbol table. DIMENSION attribute is set
5587 in gfc_set_array_spec(). */
5588 if (current_attr.dimension == 0
5589 && gfc_copy_attr (&sym->attr, ¤t_attr, &var_locus) == FAILURE)
5595 if (gfc_set_array_spec (sym, as, &var_locus) == FAILURE)
5601 if (sym->attr.cray_pointee && sym->as != NULL)
5603 /* Fix the array spec. */
5604 m = gfc_mod_pointee_as (sym->as);
5605 if (m == MATCH_ERROR)
5609 if (gfc_add_attribute (&sym->attr, &var_locus) == FAILURE)
5615 if ((current_attr.external || current_attr.intrinsic)
5616 && sym->attr.flavor != FL_PROCEDURE
5617 && gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL) == FAILURE)
5623 add_hidden_procptr_result (sym);
5628 gfc_free_array_spec (as);
5633 /* Generic attribute declaration subroutine. Used for attributes that
5634 just have a list of names. */
5641 /* Gobble the optional double colon, by simply ignoring the result
5651 if (gfc_match_eos () == MATCH_YES)
5657 if (gfc_match_char (',') != MATCH_YES)
5659 gfc_error ("Unexpected character in variable list at %C");
5669 /* This routine matches Cray Pointer declarations of the form:
5670 pointer ( <pointer>, <pointee> )
5672 pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ...
5673 The pointer, if already declared, should be an integer. Otherwise, we
5674 set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may
5675 be either a scalar, or an array declaration. No space is allocated for
5676 the pointee. For the statement
5677 pointer (ipt, ar(10))
5678 any subsequent uses of ar will be translated (in C-notation) as
5679 ar(i) => ((<type> *) ipt)(i)
5680 After gimplification, pointee variable will disappear in the code. */
5683 cray_pointer_decl (void)
5687 gfc_symbol *cptr; /* Pointer symbol. */
5688 gfc_symbol *cpte; /* Pointee symbol. */
5694 if (gfc_match_char ('(') != MATCH_YES)
5696 gfc_error ("Expected '(' at %C");
5700 /* Match pointer. */
5701 var_locus = gfc_current_locus;
5702 gfc_clear_attr (¤t_attr);
5703 gfc_add_cray_pointer (¤t_attr, &var_locus);
5704 current_ts.type = BT_INTEGER;
5705 current_ts.kind = gfc_index_integer_kind;
5707 m = gfc_match_symbol (&cptr, 0);
5710 gfc_error ("Expected variable name at %C");
5714 if (gfc_add_cray_pointer (&cptr->attr, &var_locus) == FAILURE)
5717 gfc_set_sym_referenced (cptr);
5719 if (cptr->ts.type == BT_UNKNOWN) /* Override the type, if necessary. */
5721 cptr->ts.type = BT_INTEGER;
5722 cptr->ts.kind = gfc_index_integer_kind;
5724 else if (cptr->ts.type != BT_INTEGER)
5726 gfc_error ("Cray pointer at %C must be an integer");
5729 else if (cptr->ts.kind < gfc_index_integer_kind)
5730 gfc_warning ("Cray pointer at %C has %d bytes of precision;"
5731 " memory addresses require %d bytes",
5732 cptr->ts.kind, gfc_index_integer_kind);
5734 if (gfc_match_char (',') != MATCH_YES)
5736 gfc_error ("Expected \",\" at %C");
5740 /* Match Pointee. */
5741 var_locus = gfc_current_locus;
5742 gfc_clear_attr (¤t_attr);
5743 gfc_add_cray_pointee (¤t_attr, &var_locus);
5744 current_ts.type = BT_UNKNOWN;
5745 current_ts.kind = 0;
5747 m = gfc_match_symbol (&cpte, 0);
5750 gfc_error ("Expected variable name at %C");
5754 /* Check for an optional array spec. */
5755 m = gfc_match_array_spec (&as);
5756 if (m == MATCH_ERROR)
5758 gfc_free_array_spec (as);
5761 else if (m == MATCH_NO)
5763 gfc_free_array_spec (as);
5767 if (gfc_add_cray_pointee (&cpte->attr, &var_locus) == FAILURE)
5770 gfc_set_sym_referenced (cpte);
5772 if (cpte->as == NULL)
5774 if (gfc_set_array_spec (cpte, as, &var_locus) == FAILURE)
5775 gfc_internal_error ("Couldn't set Cray pointee array spec.");
5777 else if (as != NULL)
5779 gfc_error ("Duplicate array spec for Cray pointee at %C");
5780 gfc_free_array_spec (as);
5786 if (cpte->as != NULL)
5788 /* Fix array spec. */
5789 m = gfc_mod_pointee_as (cpte->as);
5790 if (m == MATCH_ERROR)
5794 /* Point the Pointee at the Pointer. */
5795 cpte->cp_pointer = cptr;
5797 if (gfc_match_char (')') != MATCH_YES)
5799 gfc_error ("Expected \")\" at %C");
5802 m = gfc_match_char (',');
5804 done = true; /* Stop searching for more declarations. */
5808 if (m == MATCH_ERROR /* Failed when trying to find ',' above. */
5809 || gfc_match_eos () != MATCH_YES)
5811 gfc_error ("Expected \",\" or end of statement at %C");
5819 gfc_match_external (void)
5822 gfc_clear_attr (¤t_attr);
5823 current_attr.external = 1;
5825 return attr_decl ();
5830 gfc_match_intent (void)
5834 intent = match_intent_spec ();
5835 if (intent == INTENT_UNKNOWN)
5838 gfc_clear_attr (¤t_attr);
5839 current_attr.intent = intent;
5841 return attr_decl ();
5846 gfc_match_intrinsic (void)
5849 gfc_clear_attr (¤t_attr);
5850 current_attr.intrinsic = 1;
5852 return attr_decl ();
5857 gfc_match_optional (void)
5860 gfc_clear_attr (¤t_attr);
5861 current_attr.optional = 1;
5863 return attr_decl ();
5868 gfc_match_pointer (void)
5870 gfc_gobble_whitespace ();
5871 if (gfc_peek_ascii_char () == '(')
5873 if (!gfc_option.flag_cray_pointer)
5875 gfc_error ("Cray pointer declaration at %C requires -fcray-pointer "
5879 return cray_pointer_decl ();
5883 gfc_clear_attr (¤t_attr);
5884 current_attr.pointer = 1;
5886 return attr_decl ();
5892 gfc_match_allocatable (void)
5894 gfc_clear_attr (¤t_attr);
5895 current_attr.allocatable = 1;
5897 return attr_decl ();
5902 gfc_match_dimension (void)
5904 gfc_clear_attr (¤t_attr);
5905 current_attr.dimension = 1;
5907 return attr_decl ();
5912 gfc_match_target (void)
5914 gfc_clear_attr (¤t_attr);
5915 current_attr.target = 1;
5917 return attr_decl ();
5921 /* Match the list of entities being specified in a PUBLIC or PRIVATE
5925 access_attr_decl (gfc_statement st)
5927 char name[GFC_MAX_SYMBOL_LEN + 1];
5928 interface_type type;
5931 gfc_intrinsic_op op;
5934 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
5939 m = gfc_match_generic_spec (&type, name, &op);
5942 if (m == MATCH_ERROR)
5947 case INTERFACE_NAMELESS:
5948 case INTERFACE_ABSTRACT:
5951 case INTERFACE_GENERIC:
5952 if (gfc_get_symbol (name, NULL, &sym))
5955 if (gfc_add_access (&sym->attr, (st == ST_PUBLIC)
5956 ? ACCESS_PUBLIC : ACCESS_PRIVATE,
5957 sym->name, NULL) == FAILURE)
5962 case INTERFACE_INTRINSIC_OP:
5963 if (gfc_current_ns->operator_access[op] == ACCESS_UNKNOWN)
5965 gfc_current_ns->operator_access[op] =
5966 (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE;
5970 gfc_error ("Access specification of the %s operator at %C has "
5971 "already been specified", gfc_op2string (op));
5977 case INTERFACE_USER_OP:
5978 uop = gfc_get_uop (name);
5980 if (uop->access == ACCESS_UNKNOWN)
5982 uop->access = (st == ST_PUBLIC)
5983 ? ACCESS_PUBLIC : ACCESS_PRIVATE;
5987 gfc_error ("Access specification of the .%s. operator at %C "
5988 "has already been specified", sym->name);
5995 if (gfc_match_char (',') == MATCH_NO)
5999 if (gfc_match_eos () != MATCH_YES)
6004 gfc_syntax_error (st);
6012 gfc_match_protected (void)
6017 if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE)
6019 gfc_error ("PROTECTED at %C only allowed in specification "
6020 "part of a module");
6025 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED statement at %C")
6029 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6034 if (gfc_match_eos () == MATCH_YES)
6039 m = gfc_match_symbol (&sym, 0);
6043 if (gfc_add_protected (&sym->attr, sym->name, &gfc_current_locus)
6056 if (gfc_match_eos () == MATCH_YES)
6058 if (gfc_match_char (',') != MATCH_YES)
6065 gfc_error ("Syntax error in PROTECTED statement at %C");
6070 /* The PRIVATE statement is a bit weird in that it can be an attribute
6071 declaration, but also works as a standalone statement inside of a
6072 type declaration or a module. */
6075 gfc_match_private (gfc_statement *st)
6078 if (gfc_match ("private") != MATCH_YES)
6081 if (gfc_current_state () != COMP_MODULE
6082 && !(gfc_current_state () == COMP_DERIVED
6083 && gfc_state_stack->previous
6084 && gfc_state_stack->previous->state == COMP_MODULE)
6085 && !(gfc_current_state () == COMP_DERIVED_CONTAINS
6086 && gfc_state_stack->previous && gfc_state_stack->previous->previous
6087 && gfc_state_stack->previous->previous->state == COMP_MODULE))
6089 gfc_error ("PRIVATE statement at %C is only allowed in the "
6090 "specification part of a module");
6094 if (gfc_current_state () == COMP_DERIVED)
6096 if (gfc_match_eos () == MATCH_YES)
6102 gfc_syntax_error (ST_PRIVATE);
6106 if (gfc_match_eos () == MATCH_YES)
6113 return access_attr_decl (ST_PRIVATE);
6118 gfc_match_public (gfc_statement *st)
6121 if (gfc_match ("public") != MATCH_YES)
6124 if (gfc_current_state () != COMP_MODULE)
6126 gfc_error ("PUBLIC statement at %C is only allowed in the "
6127 "specification part of a module");
6131 if (gfc_match_eos () == MATCH_YES)
6138 return access_attr_decl (ST_PUBLIC);
6142 /* Workhorse for gfc_match_parameter. */
6151 m = gfc_match_symbol (&sym, 0);
6153 gfc_error ("Expected variable name at %C in PARAMETER statement");
6158 if (gfc_match_char ('=') == MATCH_NO)
6160 gfc_error ("Expected = sign in PARAMETER statement at %C");
6164 m = gfc_match_init_expr (&init);
6166 gfc_error ("Expected expression at %C in PARAMETER statement");
6170 if (sym->ts.type == BT_UNKNOWN
6171 && gfc_set_default_type (sym, 1, NULL) == FAILURE)
6177 if (gfc_check_assign_symbol (sym, init) == FAILURE
6178 || gfc_add_flavor (&sym->attr, FL_PARAMETER, sym->name, NULL) == FAILURE)
6186 gfc_error ("Initializing already initialized variable at %C");
6191 if (sym->ts.type == BT_CHARACTER
6192 && sym->ts.cl != NULL
6193 && sym->ts.cl->length != NULL
6194 && sym->ts.cl->length->expr_type == EXPR_CONSTANT
6195 && init->expr_type == EXPR_CONSTANT
6196 && init->ts.type == BT_CHARACTER)
6197 gfc_set_constant_character_len (
6198 mpz_get_si (sym->ts.cl->length->value.integer), init, -1);
6199 else if (sym->ts.type == BT_CHARACTER && sym->ts.cl != NULL
6200 && sym->ts.cl->length == NULL)
6203 if (init->expr_type == EXPR_CONSTANT)
6205 clen = init->value.character.length;
6206 sym->ts.cl->length = gfc_int_expr (clen);
6208 else if (init->expr_type == EXPR_ARRAY)
6210 gfc_expr *p = init->value.constructor->expr;
6211 clen = p->value.character.length;
6212 sym->ts.cl->length = gfc_int_expr (clen);
6214 else if (init->ts.cl && init->ts.cl->length)
6215 sym->ts.cl->length = gfc_copy_expr (sym->value->ts.cl->length);
6222 gfc_free_expr (init);
6227 /* Match a parameter statement, with the weird syntax that these have. */
6230 gfc_match_parameter (void)
6234 if (gfc_match_char ('(') == MATCH_NO)
6243 if (gfc_match (" )%t") == MATCH_YES)
6246 if (gfc_match_char (',') != MATCH_YES)
6248 gfc_error ("Unexpected characters in PARAMETER statement at %C");
6258 /* Save statements have a special syntax. */
6261 gfc_match_save (void)
6263 char n[GFC_MAX_SYMBOL_LEN+1];
6268 if (gfc_match_eos () == MATCH_YES)
6270 if (gfc_current_ns->seen_save)
6272 if (gfc_notify_std (GFC_STD_LEGACY, "Blanket SAVE statement at %C "
6273 "follows previous SAVE statement")
6278 gfc_current_ns->save_all = gfc_current_ns->seen_save = 1;
6282 if (gfc_current_ns->save_all)
6284 if (gfc_notify_std (GFC_STD_LEGACY, "SAVE statement at %C follows "
6285 "blanket SAVE statement")
6294 m = gfc_match_symbol (&sym, 0);
6298 if (gfc_add_save (&sym->attr, sym->name, &gfc_current_locus)
6310 m = gfc_match (" / %n /", &n);
6311 if (m == MATCH_ERROR)
6316 c = gfc_get_common (n, 0);
6319 gfc_current_ns->seen_save = 1;
6322 if (gfc_match_eos () == MATCH_YES)
6324 if (gfc_match_char (',') != MATCH_YES)
6331 gfc_error ("Syntax error in SAVE statement at %C");
6337 gfc_match_value (void)
6342 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE statement at %C")
6346 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6351 if (gfc_match_eos () == MATCH_YES)
6356 m = gfc_match_symbol (&sym, 0);
6360 if (gfc_add_value (&sym->attr, sym->name, &gfc_current_locus)
6373 if (gfc_match_eos () == MATCH_YES)
6375 if (gfc_match_char (',') != MATCH_YES)
6382 gfc_error ("Syntax error in VALUE statement at %C");
6388 gfc_match_volatile (void)
6393 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VOLATILE statement at %C")
6397 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6402 if (gfc_match_eos () == MATCH_YES)
6407 /* VOLATILE is special because it can be added to host-associated
6409 m = gfc_match_symbol (&sym, 1);
6413 if (gfc_add_volatile (&sym->attr, sym->name, &gfc_current_locus)
6426 if (gfc_match_eos () == MATCH_YES)
6428 if (gfc_match_char (',') != MATCH_YES)
6435 gfc_error ("Syntax error in VOLATILE statement at %C");
6440 /* Match a module procedure statement. Note that we have to modify
6441 symbols in the parent's namespace because the current one was there
6442 to receive symbols that are in an interface's formal argument list. */
6445 gfc_match_modproc (void)
6447 char name[GFC_MAX_SYMBOL_LEN + 1];
6450 gfc_namespace *module_ns;
6451 gfc_interface *old_interface_head, *interface;
6453 if (gfc_state_stack->state != COMP_INTERFACE
6454 || gfc_state_stack->previous == NULL
6455 || current_interface.type == INTERFACE_NAMELESS
6456 || current_interface.type == INTERFACE_ABSTRACT)
6458 gfc_error ("MODULE PROCEDURE at %C must be in a generic module "
6463 module_ns = gfc_current_ns->parent;
6464 for (; module_ns; module_ns = module_ns->parent)
6465 if (module_ns->proc_name->attr.flavor == FL_MODULE)
6468 if (module_ns == NULL)
6471 /* Store the current state of the interface. We will need it if we
6472 end up with a syntax error and need to recover. */
6473 old_interface_head = gfc_current_interface_head ();
6479 m = gfc_match_name (name);
6485 /* Check for syntax error before starting to add symbols to the
6486 current namespace. */
6487 if (gfc_match_eos () == MATCH_YES)
6489 if (!last && gfc_match_char (',') != MATCH_YES)
6492 /* Now we're sure the syntax is valid, we process this item
6494 if (gfc_get_symbol (name, module_ns, &sym))
6497 if (sym->attr.proc != PROC_MODULE
6498 && gfc_add_procedure (&sym->attr, PROC_MODULE,
6499 sym->name, NULL) == FAILURE)
6502 if (gfc_add_interface (sym) == FAILURE)
6505 sym->attr.mod_proc = 1;
6514 /* Restore the previous state of the interface. */
6515 interface = gfc_current_interface_head ();
6516 gfc_set_current_interface_head (old_interface_head);
6518 /* Free the new interfaces. */
6519 while (interface != old_interface_head)
6521 gfc_interface *i = interface->next;
6522 gfc_free (interface);
6526 /* And issue a syntax error. */
6527 gfc_syntax_error (ST_MODULE_PROC);
6532 /* Check a derived type that is being extended. */
6534 check_extended_derived_type (char *name)
6536 gfc_symbol *extended;
6538 if (gfc_find_symbol (name, gfc_current_ns, 1, &extended))
6540 gfc_error ("Ambiguous symbol in TYPE definition at %C");
6546 gfc_error ("No such symbol in TYPE definition at %C");
6550 if (extended->attr.flavor != FL_DERIVED)
6552 gfc_error ("'%s' in EXTENDS expression at %C is not a "
6553 "derived type", name);
6557 if (extended->attr.is_bind_c)
6559 gfc_error ("'%s' cannot be extended at %C because it "
6560 "is BIND(C)", extended->name);
6564 if (extended->attr.sequence)
6566 gfc_error ("'%s' cannot be extended at %C because it "
6567 "is a SEQUENCE type", extended->name);
6575 /* Match the optional attribute specifiers for a type declaration.
6576 Return MATCH_ERROR if an error is encountered in one of the handled
6577 attributes (public, private, bind(c)), MATCH_NO if what's found is
6578 not a handled attribute, and MATCH_YES otherwise. TODO: More error
6579 checking on attribute conflicts needs to be done. */
6582 gfc_get_type_attr_spec (symbol_attribute *attr, char *name)
6584 /* See if the derived type is marked as private. */
6585 if (gfc_match (" , private") == MATCH_YES)
6587 if (gfc_current_state () != COMP_MODULE)
6589 gfc_error ("Derived type at %C can only be PRIVATE in the "
6590 "specification part of a module");
6594 if (gfc_add_access (attr, ACCESS_PRIVATE, NULL, NULL) == FAILURE)
6597 else if (gfc_match (" , public") == MATCH_YES)
6599 if (gfc_current_state () != COMP_MODULE)
6601 gfc_error ("Derived type at %C can only be PUBLIC in the "
6602 "specification part of a module");
6606 if (gfc_add_access (attr, ACCESS_PUBLIC, NULL, NULL) == FAILURE)
6609 else if (gfc_match (" , bind ( c )") == MATCH_YES)
6611 /* If the type is defined to be bind(c) it then needs to make
6612 sure that all fields are interoperable. This will
6613 need to be a semantic check on the finished derived type.
6614 See 15.2.3 (lines 9-12) of F2003 draft. */
6615 if (gfc_add_is_bind_c (attr, NULL, &gfc_current_locus, 0) != SUCCESS)
6618 /* TODO: attr conflicts need to be checked, probably in symbol.c. */
6620 else if (gfc_match (" , abstract") == MATCH_YES)
6622 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ABSTRACT type at %C")
6626 if (gfc_add_abstract (attr, &gfc_current_locus) == FAILURE)
6629 else if (name && gfc_match(" , extends ( %n )", name) == MATCH_YES)
6631 if (gfc_add_extension (attr, &gfc_current_locus) == FAILURE)
6637 /* If we get here, something matched. */
6642 /* Match the beginning of a derived type declaration. If a type name
6643 was the result of a function, then it is possible to have a symbol
6644 already to be known as a derived type yet have no components. */
6647 gfc_match_derived_decl (void)
6649 char name[GFC_MAX_SYMBOL_LEN + 1];
6650 char parent[GFC_MAX_SYMBOL_LEN + 1];
6651 symbol_attribute attr;
6653 gfc_symbol *extended;
6655 match is_type_attr_spec = MATCH_NO;
6656 bool seen_attr = false;
6658 if (gfc_current_state () == COMP_DERIVED)
6663 gfc_clear_attr (&attr);
6668 is_type_attr_spec = gfc_get_type_attr_spec (&attr, parent);
6669 if (is_type_attr_spec == MATCH_ERROR)
6671 if (is_type_attr_spec == MATCH_YES)
6673 } while (is_type_attr_spec == MATCH_YES);
6675 /* Deal with derived type extensions. The extension attribute has
6676 been added to 'attr' but now the parent type must be found and
6679 extended = check_extended_derived_type (parent);
6681 if (parent[0] && !extended)
6684 if (gfc_match (" ::") != MATCH_YES && seen_attr)
6686 gfc_error ("Expected :: in TYPE definition at %C");
6690 m = gfc_match (" %n%t", name);
6694 /* Make sure the name is not the name of an intrinsic type. */
6695 if (gfc_is_intrinsic_typename (name))
6697 gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic "
6702 if (gfc_get_symbol (name, NULL, &sym))
6705 if (sym->ts.type != BT_UNKNOWN)
6707 gfc_error ("Derived type name '%s' at %C already has a basic type "
6708 "of %s", sym->name, gfc_typename (&sym->ts));
6712 /* The symbol may already have the derived attribute without the
6713 components. The ways this can happen is via a function
6714 definition, an INTRINSIC statement or a subtype in another
6715 derived type that is a pointer. The first part of the AND clause
6716 is true if the symbol is not the return value of a function. */
6717 if (sym->attr.flavor != FL_DERIVED
6718 && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE)
6721 if (sym->components != NULL || sym->attr.zero_comp)
6723 gfc_error ("Derived type definition of '%s' at %C has already been "
6724 "defined", sym->name);
6728 if (attr.access != ACCESS_UNKNOWN
6729 && gfc_add_access (&sym->attr, attr.access, sym->name, NULL) == FAILURE)
6732 /* See if the derived type was labeled as bind(c). */
6733 if (attr.is_bind_c != 0)
6734 sym->attr.is_bind_c = attr.is_bind_c;
6736 /* Construct the f2k_derived namespace if it is not yet there. */
6737 if (!sym->f2k_derived)
6738 sym->f2k_derived = gfc_get_namespace (NULL, 0);
6740 if (extended && !sym->components)
6745 /* Add the extended derived type as the first component. */
6746 gfc_add_component (sym, parent, &p);
6747 sym->attr.extension = attr.extension;
6749 gfc_set_sym_referenced (extended);
6751 p->ts.type = BT_DERIVED;
6752 p->ts.derived = extended;
6753 p->initializer = gfc_default_initializer (&p->ts);
6755 /* Provide the links between the extended type and its extension. */
6756 if (!extended->f2k_derived)
6757 extended->f2k_derived = gfc_get_namespace (NULL, 0);
6758 st = gfc_new_symtree (&extended->f2k_derived->sym_root, sym->name);
6762 /* Take over the ABSTRACT attribute. */
6763 sym->attr.abstract = attr.abstract;
6765 gfc_new_block = sym;
6771 /* Cray Pointees can be declared as:
6772 pointer (ipt, a (n,m,...,*))
6773 By default, this is treated as an AS_ASSUMED_SIZE array. We'll
6774 cheat and set a constant bound of 1 for the last dimension, if this
6775 is the case. Since there is no bounds-checking for Cray Pointees,
6776 this will be okay. */
6779 gfc_mod_pointee_as (gfc_array_spec *as)
6781 as->cray_pointee = true; /* This will be useful to know later. */
6782 if (as->type == AS_ASSUMED_SIZE)
6784 as->type = AS_EXPLICIT;
6785 as->upper[as->rank - 1] = gfc_int_expr (1);
6786 as->cp_was_assumed = true;
6788 else if (as->type == AS_ASSUMED_SHAPE)
6790 gfc_error ("Cray Pointee at %C cannot be assumed shape array");
6797 /* Match the enum definition statement, here we are trying to match
6798 the first line of enum definition statement.
6799 Returns MATCH_YES if match is found. */
6802 gfc_match_enum (void)
6806 m = gfc_match_eos ();
6810 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENUM and ENUMERATOR at %C")
6818 /* Returns an initializer whose value is one higher than the value of the
6819 LAST_INITIALIZER argument. If the argument is NULL, the
6820 initializers value will be set to zero. The initializer's kind
6821 will be set to gfc_c_int_kind.
6823 If -fshort-enums is given, the appropriate kind will be selected
6824 later after all enumerators have been parsed. A warning is issued
6825 here if an initializer exceeds gfc_c_int_kind. */
6828 enum_initializer (gfc_expr *last_initializer, locus where)
6832 result = gfc_get_expr ();
6833 result->expr_type = EXPR_CONSTANT;
6834 result->ts.type = BT_INTEGER;
6835 result->ts.kind = gfc_c_int_kind;
6836 result->where = where;
6838 mpz_init (result->value.integer);
6840 if (last_initializer != NULL)
6842 mpz_add_ui (result->value.integer, last_initializer->value.integer, 1);
6843 result->where = last_initializer->where;
6845 if (gfc_check_integer_range (result->value.integer,
6846 gfc_c_int_kind) != ARITH_OK)
6848 gfc_error ("Enumerator exceeds the C integer type at %C");
6854 /* Control comes here, if it's the very first enumerator and no
6855 initializer has been given. It will be initialized to zero. */
6856 mpz_set_si (result->value.integer, 0);
6863 /* Match a variable name with an optional initializer. When this
6864 subroutine is called, a variable is expected to be parsed next.
6865 Depending on what is happening at the moment, updates either the
6866 symbol table or the current interface. */
6869 enumerator_decl (void)
6871 char name[GFC_MAX_SYMBOL_LEN + 1];
6872 gfc_expr *initializer;
6873 gfc_array_spec *as = NULL;
6881 old_locus = gfc_current_locus;
6883 /* When we get here, we've just matched a list of attributes and
6884 maybe a type and a double colon. The next thing we expect to see
6885 is the name of the symbol. */
6886 m = gfc_match_name (name);
6890 var_locus = gfc_current_locus;
6892 /* OK, we've successfully matched the declaration. Now put the
6893 symbol in the current namespace. If we fail to create the symbol,
6895 if (build_sym (name, NULL, &as, &var_locus) == FAILURE)
6901 /* The double colon must be present in order to have initializers.
6902 Otherwise the statement is ambiguous with an assignment statement. */
6905 if (gfc_match_char ('=') == MATCH_YES)
6907 m = gfc_match_init_expr (&initializer);
6910 gfc_error ("Expected an initialization expression at %C");
6919 /* If we do not have an initializer, the initialization value of the
6920 previous enumerator (stored in last_initializer) is incremented
6921 by 1 and is used to initialize the current enumerator. */
6922 if (initializer == NULL)
6923 initializer = enum_initializer (last_initializer, old_locus);
6925 if (initializer == NULL || initializer->ts.type != BT_INTEGER)
6927 gfc_error("ENUMERATOR %L not initialized with integer expression",
6930 gfc_free_enum_history ();
6934 /* Store this current initializer, for the next enumerator variable
6935 to be parsed. add_init_expr_to_sym() zeros initializer, so we
6936 use last_initializer below. */
6937 last_initializer = initializer;
6938 t = add_init_expr_to_sym (name, &initializer, &var_locus);
6940 /* Maintain enumerator history. */
6941 gfc_find_symbol (name, NULL, 0, &sym);
6942 create_enum_history (sym, last_initializer);
6944 return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR;
6947 /* Free stuff up and return. */
6948 gfc_free_expr (initializer);
6954 /* Match the enumerator definition statement. */
6957 gfc_match_enumerator_def (void)
6962 gfc_clear_ts (¤t_ts);
6964 m = gfc_match (" enumerator");
6968 m = gfc_match (" :: ");
6969 if (m == MATCH_ERROR)
6972 colon_seen = (m == MATCH_YES);
6974 if (gfc_current_state () != COMP_ENUM)
6976 gfc_error ("ENUM definition statement expected before %C");
6977 gfc_free_enum_history ();
6981 (¤t_ts)->type = BT_INTEGER;
6982 (¤t_ts)->kind = gfc_c_int_kind;
6984 gfc_clear_attr (¤t_attr);
6985 t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, NULL);
6994 m = enumerator_decl ();
6995 if (m == MATCH_ERROR)
7000 if (gfc_match_eos () == MATCH_YES)
7002 if (gfc_match_char (',') != MATCH_YES)
7006 if (gfc_current_state () == COMP_ENUM)
7008 gfc_free_enum_history ();
7009 gfc_error ("Syntax error in ENUMERATOR definition at %C");
7014 gfc_free_array_spec (current_as);
7021 /* Match binding attributes. */
7024 match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc)
7026 bool found_passing = false;
7027 bool seen_ptr = false;
7028 match m = MATCH_YES;
7030 /* Intialize to defaults. Do so even before the MATCH_NO check so that in
7031 this case the defaults are in there. */
7032 ba->access = ACCESS_UNKNOWN;
7033 ba->pass_arg = NULL;
7034 ba->pass_arg_num = 0;
7036 ba->non_overridable = 0;
7040 /* If we find a comma, we believe there are binding attributes. */
7041 m = gfc_match_char (',');
7047 /* Access specifier. */
7049 m = gfc_match (" public");
7050 if (m == MATCH_ERROR)
7054 if (ba->access != ACCESS_UNKNOWN)
7056 gfc_error ("Duplicate access-specifier at %C");
7060 ba->access = ACCESS_PUBLIC;
7064 m = gfc_match (" private");
7065 if (m == MATCH_ERROR)
7069 if (ba->access != ACCESS_UNKNOWN)
7071 gfc_error ("Duplicate access-specifier at %C");
7075 ba->access = ACCESS_PRIVATE;
7079 /* If inside GENERIC, the following is not allowed. */
7084 m = gfc_match (" nopass");
7085 if (m == MATCH_ERROR)
7091 gfc_error ("Binding attributes already specify passing,"
7092 " illegal NOPASS at %C");
7096 found_passing = true;
7101 /* PASS possibly including argument. */
7102 m = gfc_match (" pass");
7103 if (m == MATCH_ERROR)
7107 char arg[GFC_MAX_SYMBOL_LEN + 1];
7111 gfc_error ("Binding attributes already specify passing,"
7112 " illegal PASS at %C");
7116 m = gfc_match (" ( %n )", arg);
7117 if (m == MATCH_ERROR)
7120 ba->pass_arg = gfc_get_string (arg);
7121 gcc_assert ((m == MATCH_YES) == (ba->pass_arg != NULL));
7123 found_passing = true;
7131 m = gfc_match (" pointer");
7132 if (m == MATCH_ERROR)
7138 gfc_error ("Duplicate POINTER attribute at %C");
7148 /* NON_OVERRIDABLE flag. */
7149 m = gfc_match (" non_overridable");
7150 if (m == MATCH_ERROR)
7154 if (ba->non_overridable)
7156 gfc_error ("Duplicate NON_OVERRIDABLE at %C");
7160 ba->non_overridable = 1;
7164 /* DEFERRED flag. */
7165 m = gfc_match (" deferred");
7166 if (m == MATCH_ERROR)
7172 gfc_error ("Duplicate DEFERRED at %C");
7183 /* Nothing matching found. */
7185 gfc_error ("Expected access-specifier at %C");
7187 gfc_error ("Expected binding attribute at %C");
7190 while (gfc_match_char (',') == MATCH_YES);
7192 /* NON_OVERRIDABLE and DEFERRED exclude themselves. */
7193 if (ba->non_overridable && ba->deferred)
7195 gfc_error ("NON_OVERRIDABLE and DEFERRED can't both appear at %C");
7202 if (ba->access == ACCESS_UNKNOWN)
7203 ba->access = gfc_typebound_default_access;
7205 if (ppc && !seen_ptr)
7207 gfc_error ("POINTER attribute is required for procedure pointer component"
7219 /* Match a PROCEDURE specific binding inside a derived type. */
7222 match_procedure_in_type (void)
7224 char name[GFC_MAX_SYMBOL_LEN + 1];
7225 char target_buf[GFC_MAX_SYMBOL_LEN + 1];
7226 char* target = NULL;
7227 gfc_typebound_proc* tb;
7235 /* Check current state. */
7236 gcc_assert (gfc_state_stack->state == COMP_DERIVED_CONTAINS);
7237 block = gfc_state_stack->previous->sym;
7240 /* Try to match PROCEDURE(interface). */
7241 if (gfc_match (" (") == MATCH_YES)
7243 m = gfc_match_name (target_buf);
7244 if (m == MATCH_ERROR)
7248 gfc_error ("Interface-name expected after '(' at %C");
7252 if (gfc_match (" )") != MATCH_YES)
7254 gfc_error ("')' expected at %C");
7258 target = target_buf;
7261 /* Construct the data structure. */
7262 tb = gfc_get_typebound_proc ();
7263 tb->where = gfc_current_locus;
7266 /* Match binding attributes. */
7267 m = match_binding_attributes (tb, false, false);
7268 if (m == MATCH_ERROR)
7270 seen_attrs = (m == MATCH_YES);
7272 /* Check that attribute DEFERRED is given iff an interface is specified, which
7273 means target != NULL. */
7274 if (tb->deferred && !target)
7276 gfc_error ("Interface must be specified for DEFERRED binding at %C");
7279 if (target && !tb->deferred)
7281 gfc_error ("PROCEDURE(interface) at %C should be declared DEFERRED");
7285 /* Match the colons. */
7286 m = gfc_match (" ::");
7287 if (m == MATCH_ERROR)
7289 seen_colons = (m == MATCH_YES);
7290 if (seen_attrs && !seen_colons)
7292 gfc_error ("Expected '::' after binding-attributes at %C");
7296 /* Match the binding name. */
7297 m = gfc_match_name (name);
7298 if (m == MATCH_ERROR)
7302 gfc_error ("Expected binding name at %C");
7306 /* Try to match the '=> target', if it's there. */
7307 m = gfc_match (" =>");
7308 if (m == MATCH_ERROR)
7314 gfc_error ("'=> target' is invalid for DEFERRED binding at %C");
7320 gfc_error ("'::' needed in PROCEDURE binding with explicit target"
7325 m = gfc_match_name (target_buf);
7326 if (m == MATCH_ERROR)
7330 gfc_error ("Expected binding target after '=>' at %C");
7333 target = target_buf;
7336 /* Now we should have the end. */
7337 m = gfc_match_eos ();
7338 if (m == MATCH_ERROR)
7342 gfc_error ("Junk after PROCEDURE declaration at %C");
7346 /* If no target was found, it has the same name as the binding. */
7350 /* Get the namespace to insert the symbols into. */
7351 ns = block->f2k_derived;
7354 /* If the binding is DEFERRED, check that the containing type is ABSTRACT. */
7355 if (tb->deferred && !block->attr.abstract)
7357 gfc_error ("Type '%s' containing DEFERRED binding at %C is not ABSTRACT",
7362 /* See if we already have a binding with this name in the symtree which would
7363 be an error. If a GENERIC already targetted this binding, it may be
7364 already there but then typebound is still NULL. */
7365 stree = gfc_find_symtree (ns->tb_sym_root, name);
7366 if (stree && stree->n.tb)
7368 gfc_error ("There's already a procedure with binding name '%s' for the"
7369 " derived type '%s' at %C", name, block->name);
7373 /* Insert it and set attributes. */
7377 stree = gfc_new_symtree (&ns->tb_sym_root, name);
7382 if (gfc_get_sym_tree (target, gfc_current_ns, &tb->u.specific, false))
7384 gfc_set_sym_referenced (tb->u.specific->n.sym);
7390 /* Match a GENERIC procedure binding inside a derived type. */
7393 gfc_match_generic (void)
7395 char name[GFC_MAX_SYMBOL_LEN + 1];
7397 gfc_typebound_proc tbattr; /* Used for match_binding_attributes. */
7398 gfc_typebound_proc* tb;
7403 /* Check current state. */
7404 if (gfc_current_state () == COMP_DERIVED)
7406 gfc_error ("GENERIC at %C must be inside a derived-type CONTAINS");
7409 if (gfc_current_state () != COMP_DERIVED_CONTAINS)
7411 block = gfc_state_stack->previous->sym;
7412 ns = block->f2k_derived;
7413 gcc_assert (block && ns);
7415 /* See if we get an access-specifier. */
7416 m = match_binding_attributes (&tbattr, true, false);
7417 if (m == MATCH_ERROR)
7420 /* Now the colons, those are required. */
7421 if (gfc_match (" ::") != MATCH_YES)
7423 gfc_error ("Expected '::' at %C");
7427 /* The binding name and =>. */
7428 m = gfc_match (" %n =>", name);
7429 if (m == MATCH_ERROR)
7433 gfc_error ("Expected generic name at %C");
7437 /* If there's already something with this name, check that it is another
7438 GENERIC and then extend that rather than build a new node. */
7439 st = gfc_find_symtree (ns->tb_sym_root, name);
7442 gcc_assert (st->n.tb);
7445 if (!tb->is_generic)
7447 gfc_error ("There's already a non-generic procedure with binding name"
7448 " '%s' for the derived type '%s' at %C",
7453 if (tb->access != tbattr.access)
7455 gfc_error ("Binding at %C must have the same access as already"
7456 " defined binding '%s'", name);
7462 st = gfc_new_symtree (&ns->tb_sym_root, name);
7465 st->n.tb = tb = gfc_get_typebound_proc ();
7466 tb->where = gfc_current_locus;
7467 tb->access = tbattr.access;
7469 tb->u.generic = NULL;
7472 /* Now, match all following names as specific targets. */
7475 gfc_symtree* target_st;
7476 gfc_tbp_generic* target;
7478 m = gfc_match_name (name);
7479 if (m == MATCH_ERROR)
7483 gfc_error ("Expected specific binding name at %C");
7487 target_st = gfc_get_tbp_symtree (&ns->tb_sym_root, name);
7489 /* See if this is a duplicate specification. */
7490 for (target = tb->u.generic; target; target = target->next)
7491 if (target_st == target->specific_st)
7493 gfc_error ("'%s' already defined as specific binding for the"
7494 " generic '%s' at %C", name, st->name);
7498 target = gfc_get_tbp_generic ();
7499 target->specific_st = target_st;
7500 target->specific = NULL;
7501 target->next = tb->u.generic;
7502 tb->u.generic = target;
7504 while (gfc_match (" ,") == MATCH_YES);
7506 /* Here should be the end. */
7507 if (gfc_match_eos () != MATCH_YES)
7509 gfc_error ("Junk after GENERIC binding at %C");
7520 /* Match a FINAL declaration inside a derived type. */
7523 gfc_match_final_decl (void)
7525 char name[GFC_MAX_SYMBOL_LEN + 1];
7528 gfc_namespace* module_ns;
7532 if (gfc_state_stack->state != COMP_DERIVED_CONTAINS)
7534 gfc_error ("FINAL declaration at %C must be inside a derived type "
7535 "CONTAINS section");
7539 block = gfc_state_stack->previous->sym;
7542 if (!gfc_state_stack->previous || !gfc_state_stack->previous->previous
7543 || gfc_state_stack->previous->previous->state != COMP_MODULE)
7545 gfc_error ("Derived type declaration with FINAL at %C must be in the"
7546 " specification part of a MODULE");
7550 module_ns = gfc_current_ns;
7551 gcc_assert (module_ns);
7552 gcc_assert (module_ns->proc_name->attr.flavor == FL_MODULE);
7554 /* Match optional ::, don't care about MATCH_YES or MATCH_NO. */
7555 if (gfc_match (" ::") == MATCH_ERROR)
7558 /* Match the sequence of procedure names. */
7565 if (first && gfc_match_eos () == MATCH_YES)
7567 gfc_error ("Empty FINAL at %C");
7571 m = gfc_match_name (name);
7574 gfc_error ("Expected module procedure name at %C");
7577 else if (m != MATCH_YES)
7580 if (gfc_match_eos () == MATCH_YES)
7582 if (!last && gfc_match_char (',') != MATCH_YES)
7584 gfc_error ("Expected ',' at %C");
7588 if (gfc_get_symbol (name, module_ns, &sym))
7590 gfc_error ("Unknown procedure name \"%s\" at %C", name);
7594 /* Mark the symbol as module procedure. */
7595 if (sym->attr.proc != PROC_MODULE
7596 && gfc_add_procedure (&sym->attr, PROC_MODULE,
7597 sym->name, NULL) == FAILURE)
7600 /* Check if we already have this symbol in the list, this is an error. */
7601 for (f = block->f2k_derived->finalizers; f; f = f->next)
7602 if (f->proc_sym == sym)
7604 gfc_error ("'%s' at %C is already defined as FINAL procedure!",
7609 /* Add this symbol to the list of finalizers. */
7610 gcc_assert (block->f2k_derived);
7612 f = XCNEW (gfc_finalizer);
7614 f->proc_tree = NULL;
7615 f->where = gfc_current_locus;
7616 f->next = block->f2k_derived->finalizers;
7617 block->f2k_derived->finalizers = f;
7627 const ext_attr_t ext_attr_list[] = {
7628 { "dllimport", EXT_ATTR_DLLIMPORT, "dllimport" },
7629 { "dllexport", EXT_ATTR_DLLEXPORT, "dllexport" },
7630 { "cdecl", EXT_ATTR_CDECL, "cdecl" },
7631 { "stdcall", EXT_ATTR_STDCALL, "stdcall" },
7632 { "fastcall", EXT_ATTR_FASTCALL, "fastcall" },
7633 { NULL, EXT_ATTR_LAST, NULL }
7636 /* Match a !GCC$ ATTRIBUTES statement of the form:
7637 !GCC$ ATTRIBUTES attribute-list :: var-name [, var-name] ...
7638 When we come here, we have already matched the !GCC$ ATTRIBUTES string.
7640 TODO: We should support all GCC attributes using the same syntax for
7641 the attribute list, i.e. the list in C
7642 __attributes(( attribute-list ))
7644 !GCC$ ATTRIBUTES attribute-list ::
7645 Cf. c-parser.c's c_parser_attributes; the data can then directly be
7648 As there is absolutely no risk of confusion, we should never return
7651 gfc_match_gcc_attributes (void)
7653 symbol_attribute attr;
7654 char name[GFC_MAX_SYMBOL_LEN + 1];
7659 gfc_clear_attr (&attr);
7664 if (gfc_match_name (name) != MATCH_YES)
7667 for (id = 0; id < EXT_ATTR_LAST; id++)
7668 if (strcmp (name, ext_attr_list[id].name) == 0)
7671 if (id == EXT_ATTR_LAST)
7673 gfc_error ("Unknown attribute in !GCC$ ATTRIBUTES statement at %C");
7677 if (gfc_add_ext_attribute (&attr, id, &gfc_current_locus)
7681 gfc_gobble_whitespace ();
7682 ch = gfc_next_ascii_char ();
7685 /* This is the successful exit condition for the loop. */
7686 if (gfc_next_ascii_char () == ':')
7696 if (gfc_match_eos () == MATCH_YES)
7701 m = gfc_match_name (name);
7705 if (find_special (name, &sym, true))
7708 sym->attr.ext_attr |= attr.ext_attr;
7710 if (gfc_match_eos () == MATCH_YES)
7713 if (gfc_match_char (',') != MATCH_YES)
7720 gfc_error ("Syntax error in !GCC$ ATTRIBUTES statement at %C");