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
1257 && init->ts.type == BT_CHARACTER)
1259 /* Update symbol character length according initializer. */
1260 if (gfc_check_assign_symbol (sym, init) == FAILURE)
1263 if (sym->ts.cl->length == NULL)
1266 /* If there are multiple CHARACTER variables declared on the
1267 same line, we don't want them to share the same length. */
1268 sym->ts.cl = gfc_new_charlen (gfc_current_ns);
1270 if (sym->attr.flavor == FL_PARAMETER)
1272 if (init->expr_type == EXPR_CONSTANT)
1274 clen = init->value.character.length;
1275 sym->ts.cl->length = gfc_int_expr (clen);
1277 else if (init->expr_type == EXPR_ARRAY)
1279 gfc_expr *p = init->value.constructor->expr;
1280 clen = p->value.character.length;
1281 sym->ts.cl->length = gfc_int_expr (clen);
1283 else if (init->ts.cl && init->ts.cl->length)
1284 sym->ts.cl->length =
1285 gfc_copy_expr (sym->value->ts.cl->length);
1288 /* Update initializer character length according symbol. */
1289 else if (sym->ts.cl->length->expr_type == EXPR_CONSTANT)
1291 int len = mpz_get_si (sym->ts.cl->length->value.integer);
1292 gfc_constructor * p;
1294 if (init->expr_type == EXPR_CONSTANT)
1295 gfc_set_constant_character_len (len, init, -1);
1296 else if (init->expr_type == EXPR_ARRAY)
1298 /* Build a new charlen to prevent simplification from
1299 deleting the length before it is resolved. */
1300 init->ts.cl = gfc_new_charlen (gfc_current_ns);
1301 init->ts.cl->length = gfc_copy_expr (sym->ts.cl->length);
1303 for (p = init->value.constructor; p; p = p->next)
1304 gfc_set_constant_character_len (len, p->expr, -1);
1309 /* Need to check if the expression we initialized this
1310 to was one of the iso_c_binding named constants. If so,
1311 and we're a parameter (constant), let it be iso_c.
1313 integer(c_int), parameter :: my_int = c_int
1314 integer(my_int) :: my_int_2
1315 If we mark my_int as iso_c (since we can see it's value
1316 is equal to one of the named constants), then my_int_2
1317 will be considered C interoperable. */
1318 if (sym->ts.type != BT_CHARACTER && sym->ts.type != BT_DERIVED)
1320 sym->ts.is_iso_c |= init->ts.is_iso_c;
1321 sym->ts.is_c_interop |= init->ts.is_c_interop;
1322 /* attr bits needed for module files. */
1323 sym->attr.is_iso_c |= init->ts.is_iso_c;
1324 sym->attr.is_c_interop |= init->ts.is_c_interop;
1325 if (init->ts.is_iso_c)
1326 sym->ts.f90_type = init->ts.f90_type;
1329 /* Add initializer. Make sure we keep the ranks sane. */
1330 if (sym->attr.dimension && init->rank == 0)
1336 if (sym->attr.flavor == FL_PARAMETER
1337 && init->expr_type == EXPR_CONSTANT
1338 && spec_size (sym->as, &size) == SUCCESS
1339 && mpz_cmp_si (size, 0) > 0)
1341 array = gfc_start_constructor (init->ts.type, init->ts.kind,
1344 array->value.constructor = c = NULL;
1345 for (n = 0; n < (int)mpz_get_si (size); n++)
1347 if (array->value.constructor == NULL)
1349 array->value.constructor = c = gfc_get_constructor ();
1354 c->next = gfc_get_constructor ();
1356 c->expr = gfc_copy_expr (init);
1360 array->shape = gfc_get_shape (sym->as->rank);
1361 for (n = 0; n < sym->as->rank; n++)
1362 spec_dimen_size (sym->as, n, &array->shape[n]);
1367 init->rank = sym->as->rank;
1371 if (sym->attr.save == SAVE_NONE)
1372 sym->attr.save = SAVE_IMPLICIT;
1380 /* Function called by variable_decl() that adds a name to a structure
1384 build_struct (const char *name, gfc_charlen *cl, gfc_expr **init,
1385 gfc_array_spec **as)
1389 /* If the current symbol is of the same derived type that we're
1390 constructing, it must have the pointer attribute. */
1391 if (current_ts.type == BT_DERIVED
1392 && current_ts.derived == gfc_current_block ()
1393 && current_attr.pointer == 0)
1395 gfc_error ("Component at %C must have the POINTER attribute");
1399 if (gfc_current_block ()->attr.pointer && (*as)->rank != 0)
1401 if ((*as)->type != AS_DEFERRED && (*as)->type != AS_EXPLICIT)
1403 gfc_error ("Array component of structure at %C must have explicit "
1404 "or deferred shape");
1409 if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE)
1414 c->attr = current_attr;
1416 c->initializer = *init;
1421 c->attr.dimension = 1;
1424 /* Should this ever get more complicated, combine with similar section
1425 in add_init_expr_to_sym into a separate function. */
1426 if (c->ts.type == BT_CHARACTER && !c->attr.pointer && c->initializer && c->ts.cl
1427 && c->ts.cl->length && c->ts.cl->length->expr_type == EXPR_CONSTANT)
1431 gcc_assert (c->ts.cl && c->ts.cl->length);
1432 gcc_assert (c->ts.cl->length->expr_type == EXPR_CONSTANT);
1433 gcc_assert (c->ts.cl->length->ts.type == BT_INTEGER);
1435 len = mpz_get_si (c->ts.cl->length->value.integer);
1437 if (c->initializer->expr_type == EXPR_CONSTANT)
1438 gfc_set_constant_character_len (len, c->initializer, -1);
1439 else if (mpz_cmp (c->ts.cl->length->value.integer,
1440 c->initializer->ts.cl->length->value.integer))
1443 gfc_constructor *ctor = c->initializer->value.constructor;
1445 has_ts = (c->initializer->ts.cl
1446 && c->initializer->ts.cl->length_from_typespec);
1452 /* Remember the length of the first element for checking
1453 that all elements *in the constructor* have the same
1454 length. This need not be the length of the LHS! */
1455 gcc_assert (ctor->expr->expr_type == EXPR_CONSTANT);
1456 gcc_assert (ctor->expr->ts.type == BT_CHARACTER);
1457 first_len = ctor->expr->value.character.length;
1459 for (; ctor; ctor = ctor->next)
1461 if (ctor->expr->expr_type == EXPR_CONSTANT)
1462 gfc_set_constant_character_len (len, ctor->expr,
1463 has_ts ? -1 : first_len);
1469 /* Check array components. */
1470 if (!c->attr.dimension)
1472 if (c->attr.allocatable)
1474 gfc_error ("Allocatable component at %C must be an array");
1481 if (c->attr.pointer)
1483 if (c->as->type != AS_DEFERRED)
1485 gfc_error ("Pointer array component of structure at %C must have a "
1490 else if (c->attr.allocatable)
1492 if (c->as->type != AS_DEFERRED)
1494 gfc_error ("Allocatable component of structure at %C must have a "
1501 if (c->as->type != AS_EXPLICIT)
1503 gfc_error ("Array component of structure at %C must have an "
1513 /* Match a 'NULL()', and possibly take care of some side effects. */
1516 gfc_match_null (gfc_expr **result)
1522 m = gfc_match (" null ( )");
1526 /* The NULL symbol now has to be/become an intrinsic function. */
1527 if (gfc_get_symbol ("null", NULL, &sym))
1529 gfc_error ("NULL() initialization at %C is ambiguous");
1533 gfc_intrinsic_symbol (sym);
1535 if (sym->attr.proc != PROC_INTRINSIC
1536 && (gfc_add_procedure (&sym->attr, PROC_INTRINSIC,
1537 sym->name, NULL) == FAILURE
1538 || gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE))
1541 e = gfc_get_expr ();
1542 e->where = gfc_current_locus;
1543 e->expr_type = EXPR_NULL;
1544 e->ts.type = BT_UNKNOWN;
1552 /* Match a variable name with an optional initializer. When this
1553 subroutine is called, a variable is expected to be parsed next.
1554 Depending on what is happening at the moment, updates either the
1555 symbol table or the current interface. */
1558 variable_decl (int elem)
1560 char name[GFC_MAX_SYMBOL_LEN + 1];
1561 gfc_expr *initializer, *char_len;
1563 gfc_array_spec *cp_as; /* Extra copy for Cray Pointees. */
1574 old_locus = gfc_current_locus;
1576 /* When we get here, we've just matched a list of attributes and
1577 maybe a type and a double colon. The next thing we expect to see
1578 is the name of the symbol. */
1579 m = gfc_match_name (name);
1583 var_locus = gfc_current_locus;
1585 /* Now we could see the optional array spec. or character length. */
1586 m = gfc_match_array_spec (&as);
1587 if (gfc_option.flag_cray_pointer && m == MATCH_YES)
1588 cp_as = gfc_copy_array_spec (as);
1589 else if (m == MATCH_ERROR)
1593 as = gfc_copy_array_spec (current_as);
1598 if (current_ts.type == BT_CHARACTER)
1600 switch (match_char_length (&char_len))
1603 cl = gfc_new_charlen (gfc_current_ns);
1605 cl->length = char_len;
1608 /* Non-constant lengths need to be copied after the first
1609 element. Also copy assumed lengths. */
1612 && (current_ts.cl->length == NULL
1613 || current_ts.cl->length->expr_type != EXPR_CONSTANT))
1615 cl = gfc_new_charlen (gfc_current_ns);
1616 cl->length = gfc_copy_expr (current_ts.cl->length);
1628 /* If this symbol has already shown up in a Cray Pointer declaration,
1629 then we want to set the type & bail out. */
1630 if (gfc_option.flag_cray_pointer)
1632 gfc_find_symbol (name, gfc_current_ns, 1, &sym);
1633 if (sym != NULL && sym->attr.cray_pointee)
1635 sym->ts.type = current_ts.type;
1636 sym->ts.kind = current_ts.kind;
1638 sym->ts.derived = current_ts.derived;
1639 sym->ts.is_c_interop = current_ts.is_c_interop;
1640 sym->ts.is_iso_c = current_ts.is_iso_c;
1643 /* Check to see if we have an array specification. */
1646 if (sym->as != NULL)
1648 gfc_error ("Duplicate array spec for Cray pointee at %C");
1649 gfc_free_array_spec (cp_as);
1655 if (gfc_set_array_spec (sym, cp_as, &var_locus) == FAILURE)
1656 gfc_internal_error ("Couldn't set pointee array spec.");
1658 /* Fix the array spec. */
1659 m = gfc_mod_pointee_as (sym->as);
1660 if (m == MATCH_ERROR)
1668 gfc_free_array_spec (cp_as);
1672 /* Procedure pointer as function result. */
1673 if (gfc_current_state () == COMP_FUNCTION
1674 && strcmp ("ppr@", gfc_current_block ()->name) == 0
1675 && strcmp (name, gfc_current_block ()->ns->proc_name->name) == 0)
1676 strcpy (name, "ppr@");
1678 if (gfc_current_state () == COMP_FUNCTION
1679 && strcmp (name, gfc_current_block ()->name) == 0
1680 && gfc_current_block ()->result
1681 && strcmp ("ppr@", gfc_current_block ()->result->name) == 0)
1682 strcpy (name, "ppr@");
1684 /* OK, we've successfully matched the declaration. Now put the
1685 symbol in the current namespace, because it might be used in the
1686 optional initialization expression for this symbol, e.g. this is
1689 integer, parameter :: i = huge(i)
1691 This is only true for parameters or variables of a basic type.
1692 For components of derived types, it is not true, so we don't
1693 create a symbol for those yet. If we fail to create the symbol,
1695 if (gfc_current_state () != COMP_DERIVED
1696 && build_sym (name, cl, &as, &var_locus) == FAILURE)
1702 /* An interface body specifies all of the procedure's
1703 characteristics and these shall be consistent with those
1704 specified in the procedure definition, except that the interface
1705 may specify a procedure that is not pure if the procedure is
1706 defined to be pure(12.3.2). */
1707 if (current_ts.type == BT_DERIVED
1708 && gfc_current_ns->proc_name
1709 && gfc_current_ns->proc_name->attr.if_source == IFSRC_IFBODY
1710 && current_ts.derived->ns != gfc_current_ns)
1713 st = gfc_find_symtree (gfc_current_ns->sym_root, current_ts.derived->name);
1714 if (!(current_ts.derived->attr.imported
1716 && st->n.sym == current_ts.derived)
1717 && !gfc_current_ns->has_import_set)
1719 gfc_error ("the type of '%s' at %C has not been declared within the "
1726 /* In functions that have a RESULT variable defined, the function
1727 name always refers to function calls. Therefore, the name is
1728 not allowed to appear in specification statements. */
1729 if (gfc_current_state () == COMP_FUNCTION
1730 && gfc_current_block () != NULL
1731 && gfc_current_block ()->result != NULL
1732 && gfc_current_block ()->result != gfc_current_block ()
1733 && strcmp (gfc_current_block ()->name, name) == 0)
1735 gfc_error ("Function name '%s' not allowed at %C", name);
1740 /* We allow old-style initializations of the form
1741 integer i /2/, j(4) /3*3, 1/
1742 (if no colon has been seen). These are different from data
1743 statements in that initializers are only allowed to apply to the
1744 variable immediately preceding, i.e.
1746 is not allowed. Therefore we have to do some work manually, that
1747 could otherwise be left to the matchers for DATA statements. */
1749 if (!colon_seen && gfc_match (" /") == MATCH_YES)
1751 if (gfc_notify_std (GFC_STD_GNU, "Extension: Old-style "
1752 "initialization at %C") == FAILURE)
1755 return match_old_style_init (name);
1758 /* The double colon must be present in order to have initializers.
1759 Otherwise the statement is ambiguous with an assignment statement. */
1762 if (gfc_match (" =>") == MATCH_YES)
1764 if (!current_attr.pointer)
1766 gfc_error ("Initialization at %C isn't for a pointer variable");
1771 m = gfc_match_null (&initializer);
1774 gfc_error ("Pointer initialization requires a NULL() at %C");
1778 if (gfc_pure (NULL))
1780 gfc_error ("Initialization of pointer at %C is not allowed in "
1781 "a PURE procedure");
1789 else if (gfc_match_char ('=') == MATCH_YES)
1791 if (current_attr.pointer)
1793 gfc_error ("Pointer initialization at %C requires '=>', "
1799 m = gfc_match_init_expr (&initializer);
1802 gfc_error ("Expected an initialization expression at %C");
1806 if (current_attr.flavor != FL_PARAMETER && gfc_pure (NULL))
1808 gfc_error ("Initialization of variable at %C is not allowed in "
1809 "a PURE procedure");
1818 if (initializer != NULL && current_attr.allocatable
1819 && gfc_current_state () == COMP_DERIVED)
1821 gfc_error ("Initialization of allocatable component at %C is not "
1827 /* Add the initializer. Note that it is fine if initializer is
1828 NULL here, because we sometimes also need to check if a
1829 declaration *must* have an initialization expression. */
1830 if (gfc_current_state () != COMP_DERIVED)
1831 t = add_init_expr_to_sym (name, &initializer, &var_locus);
1834 if (current_ts.type == BT_DERIVED
1835 && !current_attr.pointer && !initializer)
1836 initializer = gfc_default_initializer (¤t_ts);
1837 t = build_struct (name, cl, &initializer, &as);
1840 m = (t == SUCCESS) ? MATCH_YES : MATCH_ERROR;
1843 /* Free stuff up and return. */
1844 gfc_free_expr (initializer);
1845 gfc_free_array_spec (as);
1851 /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification.
1852 This assumes that the byte size is equal to the kind number for
1853 non-COMPLEX types, and equal to twice the kind number for COMPLEX. */
1856 gfc_match_old_kind_spec (gfc_typespec *ts)
1861 if (gfc_match_char ('*') != MATCH_YES)
1864 m = gfc_match_small_literal_int (&ts->kind, NULL);
1868 original_kind = ts->kind;
1870 /* Massage the kind numbers for complex types. */
1871 if (ts->type == BT_COMPLEX)
1875 gfc_error ("Old-style type declaration %s*%d not supported at %C",
1876 gfc_basic_typename (ts->type), original_kind);
1882 if (gfc_validate_kind (ts->type, ts->kind, true) < 0)
1884 gfc_error ("Old-style type declaration %s*%d not supported at %C",
1885 gfc_basic_typename (ts->type), original_kind);
1889 if (gfc_notify_std (GFC_STD_GNU, "Nonstandard type declaration %s*%d at %C",
1890 gfc_basic_typename (ts->type), original_kind) == FAILURE)
1897 /* Match a kind specification. Since kinds are generally optional, we
1898 usually return MATCH_NO if something goes wrong. If a "kind="
1899 string is found, then we know we have an error. */
1902 gfc_match_kind_spec (gfc_typespec *ts, bool kind_expr_only)
1914 where = loc = gfc_current_locus;
1919 if (gfc_match_char ('(') == MATCH_NO)
1922 /* Also gobbles optional text. */
1923 if (gfc_match (" kind = ") == MATCH_YES)
1926 loc = gfc_current_locus;
1929 n = gfc_match_init_expr (&e);
1933 if (gfc_matching_function)
1935 /* The function kind expression might include use associated or
1936 imported parameters and try again after the specification
1938 if (gfc_match_char (')') != MATCH_YES)
1940 gfc_error ("Missing right parenthesis at %C");
1946 gfc_undo_symbols ();
1951 /* ....or else, the match is real. */
1953 gfc_error ("Expected initialization expression at %C");
1961 gfc_error ("Expected scalar initialization expression at %C");
1966 msg = gfc_extract_int (e, &ts->kind);
1975 /* Before throwing away the expression, let's see if we had a
1976 C interoperable kind (and store the fact). */
1977 if (e->ts.is_c_interop == 1)
1979 /* Mark this as c interoperable if being declared with one
1980 of the named constants from iso_c_binding. */
1981 ts->is_c_interop = e->ts.is_iso_c;
1982 ts->f90_type = e->ts.f90_type;
1988 /* Ignore errors to this point, if we've gotten here. This means
1989 we ignore the m=MATCH_ERROR from above. */
1990 if (gfc_validate_kind (ts->type, ts->kind, true) < 0)
1992 gfc_error ("Kind %d not supported for type %s at %C", ts->kind,
1993 gfc_basic_typename (ts->type));
1994 gfc_current_locus = where;
1998 /* Warn if, e.g., c_int is used for a REAL variable, but not
1999 if, e.g., c_double is used for COMPLEX as the standard
2000 explicitly says that the kind type parameter for complex and real
2001 variable is the same, i.e. c_float == c_float_complex. */
2002 if (ts->f90_type != BT_UNKNOWN && ts->f90_type != ts->type
2003 && !((ts->f90_type == BT_REAL && ts->type == BT_COMPLEX)
2004 || (ts->f90_type == BT_COMPLEX && ts->type == BT_REAL)))
2005 gfc_warning_now ("C kind type parameter is for type %s but type at %L "
2006 "is %s", gfc_basic_typename (ts->f90_type), &where,
2007 gfc_basic_typename (ts->type));
2009 gfc_gobble_whitespace ();
2010 if ((c = gfc_next_ascii_char ()) != ')'
2011 && (ts->type != BT_CHARACTER || c != ','))
2013 if (ts->type == BT_CHARACTER)
2014 gfc_error ("Missing right parenthesis or comma at %C");
2016 gfc_error ("Missing right parenthesis at %C");
2020 /* All tests passed. */
2023 if(m == MATCH_ERROR)
2024 gfc_current_locus = where;
2026 /* Return what we know from the test(s). */
2031 gfc_current_locus = where;
2037 match_char_kind (int * kind, int * is_iso_c)
2046 where = gfc_current_locus;
2048 n = gfc_match_init_expr (&e);
2050 if (n != MATCH_YES && gfc_matching_function)
2052 /* The expression might include use-associated or imported
2053 parameters and try again after the specification
2056 gfc_undo_symbols ();
2061 gfc_error ("Expected initialization expression at %C");
2067 gfc_error ("Expected scalar initialization expression at %C");
2072 msg = gfc_extract_int (e, kind);
2073 *is_iso_c = e->ts.is_iso_c;
2083 /* Ignore errors to this point, if we've gotten here. This means
2084 we ignore the m=MATCH_ERROR from above. */
2085 if (gfc_validate_kind (BT_CHARACTER, *kind, true) < 0)
2087 gfc_error ("Kind %d is not supported for CHARACTER at %C", *kind);
2091 /* All tests passed. */
2094 if (m == MATCH_ERROR)
2095 gfc_current_locus = where;
2097 /* Return what we know from the test(s). */
2102 gfc_current_locus = where;
2106 /* Match the various kind/length specifications in a CHARACTER
2107 declaration. We don't return MATCH_NO. */
2110 match_char_spec (gfc_typespec *ts)
2112 int kind, seen_length, is_iso_c;
2122 /* Try the old-style specification first. */
2123 old_char_selector = 0;
2125 m = match_char_length (&len);
2129 old_char_selector = 1;
2134 m = gfc_match_char ('(');
2137 m = MATCH_YES; /* Character without length is a single char. */
2141 /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ). */
2142 if (gfc_match (" kind =") == MATCH_YES)
2144 m = match_char_kind (&kind, &is_iso_c);
2146 if (m == MATCH_ERROR)
2151 if (gfc_match (" , len =") == MATCH_NO)
2154 m = char_len_param_value (&len);
2157 if (m == MATCH_ERROR)
2164 /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>". */
2165 if (gfc_match (" len =") == MATCH_YES)
2167 m = char_len_param_value (&len);
2170 if (m == MATCH_ERROR)
2174 if (gfc_match_char (')') == MATCH_YES)
2177 if (gfc_match (" , kind =") != MATCH_YES)
2180 if (match_char_kind (&kind, &is_iso_c) == MATCH_ERROR)
2186 /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */
2187 m = char_len_param_value (&len);
2190 if (m == MATCH_ERROR)
2194 m = gfc_match_char (')');
2198 if (gfc_match_char (',') != MATCH_YES)
2201 gfc_match (" kind ="); /* Gobble optional text. */
2203 m = match_char_kind (&kind, &is_iso_c);
2204 if (m == MATCH_ERROR)
2210 /* Require a right-paren at this point. */
2211 m = gfc_match_char (')');
2216 gfc_error ("Syntax error in CHARACTER declaration at %C");
2218 gfc_free_expr (len);
2222 /* Deal with character functions after USE and IMPORT statements. */
2223 if (gfc_matching_function)
2225 gfc_free_expr (len);
2226 gfc_undo_symbols ();
2232 gfc_free_expr (len);
2236 /* Do some final massaging of the length values. */
2237 cl = gfc_new_charlen (gfc_current_ns);
2239 if (seen_length == 0)
2240 cl->length = gfc_int_expr (1);
2245 ts->kind = kind == 0 ? gfc_default_character_kind : kind;
2247 /* We have to know if it was a c interoperable kind so we can
2248 do accurate type checking of bind(c) procs, etc. */
2250 /* Mark this as c interoperable if being declared with one
2251 of the named constants from iso_c_binding. */
2252 ts->is_c_interop = is_iso_c;
2253 else if (len != NULL)
2254 /* Here, we might have parsed something such as: character(c_char)
2255 In this case, the parsing code above grabs the c_char when
2256 looking for the length (line 1690, roughly). it's the last
2257 testcase for parsing the kind params of a character variable.
2258 However, it's not actually the length. this seems like it
2260 To see if the user used a C interop kind, test the expr
2261 of the so called length, and see if it's C interoperable. */
2262 ts->is_c_interop = len->ts.is_iso_c;
2268 /* Matches a type specification. If successful, sets the ts structure
2269 to the matched specification. This is necessary for FUNCTION and
2270 IMPLICIT statements.
2272 If implicit_flag is nonzero, then we don't check for the optional
2273 kind specification. Not doing so is needed for matching an IMPLICIT
2274 statement correctly. */
2277 gfc_match_type_spec (gfc_typespec *ts, int implicit_flag)
2279 char name[GFC_MAX_SYMBOL_LEN + 1];
2283 bool seen_deferred_kind;
2285 /* A belt and braces check that the typespec is correctly being treated
2286 as a deferred characteristic association. */
2287 seen_deferred_kind = (gfc_current_state () == COMP_FUNCTION)
2288 && (gfc_current_block ()->result->ts.kind == -1)
2289 && (ts->kind == -1);
2291 if (seen_deferred_kind)
2294 /* Clear the current binding label, in case one is given. */
2295 curr_binding_label[0] = '\0';
2297 if (gfc_match (" byte") == MATCH_YES)
2299 if (gfc_notify_std(GFC_STD_GNU, "Extension: BYTE type at %C")
2303 if (gfc_validate_kind (BT_INTEGER, 1, true) < 0)
2305 gfc_error ("BYTE type used at %C "
2306 "is not available on the target machine");
2310 ts->type = BT_INTEGER;
2315 if (gfc_match (" integer") == MATCH_YES)
2317 ts->type = BT_INTEGER;
2318 ts->kind = gfc_default_integer_kind;
2322 if (gfc_match (" character") == MATCH_YES)
2324 ts->type = BT_CHARACTER;
2325 if (implicit_flag == 0)
2326 return match_char_spec (ts);
2331 if (gfc_match (" real") == MATCH_YES)
2334 ts->kind = gfc_default_real_kind;
2338 if (gfc_match (" double precision") == MATCH_YES)
2341 ts->kind = gfc_default_double_kind;
2345 if (gfc_match (" complex") == MATCH_YES)
2347 ts->type = BT_COMPLEX;
2348 ts->kind = gfc_default_complex_kind;
2352 if (gfc_match (" double complex") == MATCH_YES)
2354 if (gfc_notify_std (GFC_STD_GNU, "DOUBLE COMPLEX at %C does not "
2355 "conform to the Fortran 95 standard") == FAILURE)
2358 ts->type = BT_COMPLEX;
2359 ts->kind = gfc_default_double_kind;
2363 if (gfc_match (" logical") == MATCH_YES)
2365 ts->type = BT_LOGICAL;
2366 ts->kind = gfc_default_logical_kind;
2370 m = gfc_match (" type ( %n )", name);
2374 ts->type = BT_DERIVED;
2376 /* Defer association of the derived type until the end of the
2377 specification block. However, if the derived type can be
2378 found, add it to the typespec. */
2379 if (gfc_matching_function)
2382 if (gfc_current_state () != COMP_INTERFACE
2383 && !gfc_find_symbol (name, NULL, 1, &sym) && sym)
2388 /* Search for the name but allow the components to be defined later. If
2389 type = -1, this typespec has been seen in a function declaration but
2390 the type could not be accessed at that point. */
2392 if (ts->kind != -1 && gfc_get_ha_symbol (name, &sym))
2394 gfc_error ("Type name '%s' at %C is ambiguous", name);
2397 else if (ts->kind == -1)
2399 int iface = gfc_state_stack->previous->state != COMP_INTERFACE
2400 || gfc_current_ns->has_import_set;
2401 if (gfc_find_symbol (name, NULL, iface, &sym))
2403 gfc_error ("Type name '%s' at %C is ambiguous", name);
2412 if (sym->attr.flavor != FL_DERIVED
2413 && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE)
2416 gfc_set_sym_referenced (sym);
2422 /* For all types except double, derived and character, look for an
2423 optional kind specifier. MATCH_NO is actually OK at this point. */
2424 if (implicit_flag == 1)
2427 if (gfc_current_form == FORM_FREE)
2429 c = gfc_peek_ascii_char();
2430 if (!gfc_is_whitespace(c) && c != '*' && c != '('
2431 && c != ':' && c != ',')
2435 m = gfc_match_kind_spec (ts, false);
2436 if (m == MATCH_NO && ts->type != BT_CHARACTER)
2437 m = gfc_match_old_kind_spec (ts);
2439 /* Defer association of the KIND expression of function results
2440 until after USE and IMPORT statements. */
2441 if ((gfc_current_state () == COMP_NONE && gfc_error_flag_test ())
2442 || gfc_matching_function)
2446 m = MATCH_YES; /* No kind specifier found. */
2452 /* Match an IMPLICIT NONE statement. Actually, this statement is
2453 already matched in parse.c, or we would not end up here in the
2454 first place. So the only thing we need to check, is if there is
2455 trailing garbage. If not, the match is successful. */
2458 gfc_match_implicit_none (void)
2460 return (gfc_match_eos () == MATCH_YES) ? MATCH_YES : MATCH_NO;
2464 /* Match the letter range(s) of an IMPLICIT statement. */
2467 match_implicit_range (void)
2473 cur_loc = gfc_current_locus;
2475 gfc_gobble_whitespace ();
2476 c = gfc_next_ascii_char ();
2479 gfc_error ("Missing character range in IMPLICIT at %C");
2486 gfc_gobble_whitespace ();
2487 c1 = gfc_next_ascii_char ();
2491 gfc_gobble_whitespace ();
2492 c = gfc_next_ascii_char ();
2497 inner = 0; /* Fall through. */
2504 gfc_gobble_whitespace ();
2505 c2 = gfc_next_ascii_char ();
2509 gfc_gobble_whitespace ();
2510 c = gfc_next_ascii_char ();
2512 if ((c != ',') && (c != ')'))
2525 gfc_error ("Letters must be in alphabetic order in "
2526 "IMPLICIT statement at %C");
2530 /* See if we can add the newly matched range to the pending
2531 implicits from this IMPLICIT statement. We do not check for
2532 conflicts with whatever earlier IMPLICIT statements may have
2533 set. This is done when we've successfully finished matching
2535 if (gfc_add_new_implicit_range (c1, c2) != SUCCESS)
2542 gfc_syntax_error (ST_IMPLICIT);
2544 gfc_current_locus = cur_loc;
2549 /* Match an IMPLICIT statement, storing the types for
2550 gfc_set_implicit() if the statement is accepted by the parser.
2551 There is a strange looking, but legal syntactic construction
2552 possible. It looks like:
2554 IMPLICIT INTEGER (a-b) (c-d)
2556 This is legal if "a-b" is a constant expression that happens to
2557 equal one of the legal kinds for integers. The real problem
2558 happens with an implicit specification that looks like:
2560 IMPLICIT INTEGER (a-b)
2562 In this case, a typespec matcher that is "greedy" (as most of the
2563 matchers are) gobbles the character range as a kindspec, leaving
2564 nothing left. We therefore have to go a bit more slowly in the
2565 matching process by inhibiting the kindspec checking during
2566 typespec matching and checking for a kind later. */
2569 gfc_match_implicit (void)
2578 /* We don't allow empty implicit statements. */
2579 if (gfc_match_eos () == MATCH_YES)
2581 gfc_error ("Empty IMPLICIT statement at %C");
2587 /* First cleanup. */
2588 gfc_clear_new_implicit ();
2590 /* A basic type is mandatory here. */
2591 m = gfc_match_type_spec (&ts, 1);
2592 if (m == MATCH_ERROR)
2597 cur_loc = gfc_current_locus;
2598 m = match_implicit_range ();
2602 /* We may have <TYPE> (<RANGE>). */
2603 gfc_gobble_whitespace ();
2604 c = gfc_next_ascii_char ();
2605 if ((c == '\n') || (c == ','))
2607 /* Check for CHARACTER with no length parameter. */
2608 if (ts.type == BT_CHARACTER && !ts.cl)
2610 ts.kind = gfc_default_character_kind;
2611 ts.cl = gfc_new_charlen (gfc_current_ns);
2612 ts.cl->length = gfc_int_expr (1);
2615 /* Record the Successful match. */
2616 if (gfc_merge_new_implicit (&ts) != SUCCESS)
2621 gfc_current_locus = cur_loc;
2624 /* Discard the (incorrectly) matched range. */
2625 gfc_clear_new_implicit ();
2627 /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */
2628 if (ts.type == BT_CHARACTER)
2629 m = match_char_spec (&ts);
2632 m = gfc_match_kind_spec (&ts, false);
2635 m = gfc_match_old_kind_spec (&ts);
2636 if (m == MATCH_ERROR)
2642 if (m == MATCH_ERROR)
2645 m = match_implicit_range ();
2646 if (m == MATCH_ERROR)
2651 gfc_gobble_whitespace ();
2652 c = gfc_next_ascii_char ();
2653 if ((c != '\n') && (c != ','))
2656 if (gfc_merge_new_implicit (&ts) != SUCCESS)
2664 gfc_syntax_error (ST_IMPLICIT);
2672 gfc_match_import (void)
2674 char name[GFC_MAX_SYMBOL_LEN + 1];
2679 if (gfc_current_ns->proc_name == NULL
2680 || gfc_current_ns->proc_name->attr.if_source != IFSRC_IFBODY)
2682 gfc_error ("IMPORT statement at %C only permitted in "
2683 "an INTERFACE body");
2687 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IMPORT statement at %C")
2691 if (gfc_match_eos () == MATCH_YES)
2693 /* All host variables should be imported. */
2694 gfc_current_ns->has_import_set = 1;
2698 if (gfc_match (" ::") == MATCH_YES)
2700 if (gfc_match_eos () == MATCH_YES)
2702 gfc_error ("Expecting list of named entities at %C");
2709 m = gfc_match (" %n", name);
2713 if (gfc_current_ns->parent != NULL
2714 && gfc_find_symbol (name, gfc_current_ns->parent, 1, &sym))
2716 gfc_error ("Type name '%s' at %C is ambiguous", name);
2719 else if (gfc_current_ns->proc_name->ns->parent != NULL
2720 && gfc_find_symbol (name,
2721 gfc_current_ns->proc_name->ns->parent,
2724 gfc_error ("Type name '%s' at %C is ambiguous", name);
2730 gfc_error ("Cannot IMPORT '%s' from host scoping unit "
2731 "at %C - does not exist.", name);
2735 if (gfc_find_symtree (gfc_current_ns->sym_root,name))
2737 gfc_warning ("'%s' is already IMPORTed from host scoping unit "
2742 st = gfc_new_symtree (&gfc_current_ns->sym_root, sym->name);
2745 sym->attr.imported = 1;
2757 if (gfc_match_eos () == MATCH_YES)
2759 if (gfc_match_char (',') != MATCH_YES)
2766 gfc_error ("Syntax error in IMPORT statement at %C");
2771 /* A minimal implementation of gfc_match without whitespace, escape
2772 characters or variable arguments. Returns true if the next
2773 characters match the TARGET template exactly. */
2776 match_string_p (const char *target)
2780 for (p = target; *p; p++)
2781 if ((char) gfc_next_ascii_char () != *p)
2786 /* Matches an attribute specification including array specs. If
2787 successful, leaves the variables current_attr and current_as
2788 holding the specification. Also sets the colon_seen variable for
2789 later use by matchers associated with initializations.
2791 This subroutine is a little tricky in the sense that we don't know
2792 if we really have an attr-spec until we hit the double colon.
2793 Until that time, we can only return MATCH_NO. This forces us to
2794 check for duplicate specification at this level. */
2797 match_attr_spec (void)
2799 /* Modifiers that can exist in a type statement. */
2801 { GFC_DECL_BEGIN = 0,
2802 DECL_ALLOCATABLE = GFC_DECL_BEGIN, DECL_DIMENSION, DECL_EXTERNAL,
2803 DECL_IN, DECL_OUT, DECL_INOUT, DECL_INTRINSIC, DECL_OPTIONAL,
2804 DECL_PARAMETER, DECL_POINTER, DECL_PROTECTED, DECL_PRIVATE,
2805 DECL_PUBLIC, DECL_SAVE, DECL_TARGET, DECL_VALUE, DECL_VOLATILE,
2806 DECL_IS_BIND_C, DECL_NONE,
2807 GFC_DECL_END /* Sentinel */
2811 /* GFC_DECL_END is the sentinel, index starts at 0. */
2812 #define NUM_DECL GFC_DECL_END
2814 locus start, seen_at[NUM_DECL];
2821 gfc_clear_attr (¤t_attr);
2822 start = gfc_current_locus;
2827 /* See if we get all of the keywords up to the final double colon. */
2828 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
2836 gfc_gobble_whitespace ();
2838 ch = gfc_next_ascii_char ();
2841 /* This is the successful exit condition for the loop. */
2842 if (gfc_next_ascii_char () == ':')
2847 gfc_gobble_whitespace ();
2848 switch (gfc_peek_ascii_char ())
2851 if (match_string_p ("allocatable"))
2852 d = DECL_ALLOCATABLE;
2856 /* Try and match the bind(c). */
2857 m = gfc_match_bind_c (NULL, true);
2860 else if (m == MATCH_ERROR)
2865 if (match_string_p ("dimension"))
2870 if (match_string_p ("external"))
2875 if (match_string_p ("int"))
2877 ch = gfc_next_ascii_char ();
2880 if (match_string_p ("nt"))
2882 /* Matched "intent". */
2883 /* TODO: Call match_intent_spec from here. */
2884 if (gfc_match (" ( in out )") == MATCH_YES)
2886 else if (gfc_match (" ( in )") == MATCH_YES)
2888 else if (gfc_match (" ( out )") == MATCH_YES)
2894 if (match_string_p ("insic"))
2896 /* Matched "intrinsic". */
2904 if (match_string_p ("optional"))
2909 gfc_next_ascii_char ();
2910 switch (gfc_next_ascii_char ())
2913 if (match_string_p ("rameter"))
2915 /* Matched "parameter". */
2921 if (match_string_p ("inter"))
2923 /* Matched "pointer". */
2929 ch = gfc_next_ascii_char ();
2932 if (match_string_p ("vate"))
2934 /* Matched "private". */
2940 if (match_string_p ("tected"))
2942 /* Matched "protected". */
2949 if (match_string_p ("blic"))
2951 /* Matched "public". */
2959 if (match_string_p ("save"))
2964 if (match_string_p ("target"))
2969 gfc_next_ascii_char ();
2970 ch = gfc_next_ascii_char ();
2973 if (match_string_p ("lue"))
2975 /* Matched "value". */
2981 if (match_string_p ("latile"))
2983 /* Matched "volatile". */
2991 /* No double colon and no recognizable decl_type, so assume that
2992 we've been looking at something else the whole time. */
2999 /* Check to make sure any parens are paired up correctly. */
3000 if (gfc_match_parens () == MATCH_ERROR)
3007 seen_at[d] = gfc_current_locus;
3009 if (d == DECL_DIMENSION)
3011 m = gfc_match_array_spec (¤t_as);
3015 gfc_error ("Missing dimension specification at %C");
3019 if (m == MATCH_ERROR)
3024 /* Since we've seen a double colon, we have to be looking at an
3025 attr-spec. This means that we can now issue errors. */
3026 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
3031 case DECL_ALLOCATABLE:
3032 attr = "ALLOCATABLE";
3034 case DECL_DIMENSION:
3041 attr = "INTENT (IN)";
3044 attr = "INTENT (OUT)";
3047 attr = "INTENT (IN OUT)";
3049 case DECL_INTRINSIC:
3055 case DECL_PARAMETER:
3061 case DECL_PROTECTED:
3076 case DECL_IS_BIND_C:
3086 attr = NULL; /* This shouldn't happen. */
3089 gfc_error ("Duplicate %s attribute at %L", attr, &seen_at[d]);
3094 /* Now that we've dealt with duplicate attributes, add the attributes
3095 to the current attribute. */
3096 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
3101 if (gfc_current_state () == COMP_DERIVED
3102 && d != DECL_DIMENSION && d != DECL_POINTER
3103 && d != DECL_PRIVATE && d != DECL_PUBLIC
3106 if (d == DECL_ALLOCATABLE)
3108 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ALLOCATABLE "
3109 "attribute at %C in a TYPE definition")
3118 gfc_error ("Attribute at %L is not allowed in a TYPE definition",
3125 if ((d == DECL_PRIVATE || d == DECL_PUBLIC)
3126 && gfc_current_state () != COMP_MODULE)
3128 if (d == DECL_PRIVATE)
3132 if (gfc_current_state () == COMP_DERIVED
3133 && gfc_state_stack->previous
3134 && gfc_state_stack->previous->state == COMP_MODULE)
3136 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Attribute %s "
3137 "at %L in a TYPE definition", attr,
3147 gfc_error ("%s attribute at %L is not allowed outside of the "
3148 "specification part of a module", attr, &seen_at[d]);
3156 case DECL_ALLOCATABLE:
3157 t = gfc_add_allocatable (¤t_attr, &seen_at[d]);
3160 case DECL_DIMENSION:
3161 t = gfc_add_dimension (¤t_attr, NULL, &seen_at[d]);
3165 t = gfc_add_external (¤t_attr, &seen_at[d]);
3169 t = gfc_add_intent (¤t_attr, INTENT_IN, &seen_at[d]);
3173 t = gfc_add_intent (¤t_attr, INTENT_OUT, &seen_at[d]);
3177 t = gfc_add_intent (¤t_attr, INTENT_INOUT, &seen_at[d]);
3180 case DECL_INTRINSIC:
3181 t = gfc_add_intrinsic (¤t_attr, &seen_at[d]);
3185 t = gfc_add_optional (¤t_attr, &seen_at[d]);
3188 case DECL_PARAMETER:
3189 t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, &seen_at[d]);
3193 t = gfc_add_pointer (¤t_attr, &seen_at[d]);
3196 case DECL_PROTECTED:
3197 if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE)
3199 gfc_error ("PROTECTED at %C only allowed in specification "
3200 "part of a module");
3205 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED "
3210 t = gfc_add_protected (¤t_attr, NULL, &seen_at[d]);
3214 t = gfc_add_access (¤t_attr, ACCESS_PRIVATE, NULL,
3219 t = gfc_add_access (¤t_attr, ACCESS_PUBLIC, NULL,
3224 t = gfc_add_save (¤t_attr, NULL, &seen_at[d]);
3228 t = gfc_add_target (¤t_attr, &seen_at[d]);
3231 case DECL_IS_BIND_C:
3232 t = gfc_add_is_bind_c(¤t_attr, NULL, &seen_at[d], 0);
3236 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE attribute "
3241 t = gfc_add_value (¤t_attr, NULL, &seen_at[d]);
3245 if (gfc_notify_std (GFC_STD_F2003,
3246 "Fortran 2003: VOLATILE attribute at %C")
3250 t = gfc_add_volatile (¤t_attr, NULL, &seen_at[d]);
3254 gfc_internal_error ("match_attr_spec(): Bad attribute");
3268 gfc_current_locus = start;
3269 gfc_free_array_spec (current_as);
3275 /* Set the binding label, dest_label, either with the binding label
3276 stored in the given gfc_typespec, ts, or if none was provided, it
3277 will be the symbol name in all lower case, as required by the draft
3278 (J3/04-007, section 15.4.1). If a binding label was given and
3279 there is more than one argument (num_idents), it is an error. */
3282 set_binding_label (char *dest_label, const char *sym_name, int num_idents)
3284 if (num_idents > 1 && has_name_equals)
3286 gfc_error ("Multiple identifiers provided with "
3287 "single NAME= specifier at %C");
3291 if (curr_binding_label[0] != '\0')
3293 /* Binding label given; store in temp holder til have sym. */
3294 strcpy (dest_label, curr_binding_label);
3298 /* No binding label given, and the NAME= specifier did not exist,
3299 which means there was no NAME="". */
3300 if (sym_name != NULL && has_name_equals == 0)
3301 strcpy (dest_label, sym_name);
3308 /* Set the status of the given common block as being BIND(C) or not,
3309 depending on the given parameter, is_bind_c. */
3312 set_com_block_bind_c (gfc_common_head *com_block, int is_bind_c)
3314 com_block->is_bind_c = is_bind_c;
3319 /* Verify that the given gfc_typespec is for a C interoperable type. */
3322 verify_c_interop (gfc_typespec *ts)
3324 if (ts->type == BT_DERIVED && ts->derived != NULL)
3325 return (ts->derived->ts.is_c_interop ? SUCCESS : FAILURE);
3326 else if (ts->is_c_interop != 1)
3333 /* Verify that the variables of a given common block, which has been
3334 defined with the attribute specifier bind(c), to be of a C
3335 interoperable type. Errors will be reported here, if
3339 verify_com_block_vars_c_interop (gfc_common_head *com_block)
3341 gfc_symbol *curr_sym = NULL;
3342 gfc_try retval = SUCCESS;
3344 curr_sym = com_block->head;
3346 /* Make sure we have at least one symbol. */
3347 if (curr_sym == NULL)
3350 /* Here we know we have a symbol, so we'll execute this loop
3354 /* The second to last param, 1, says this is in a common block. */
3355 retval = verify_bind_c_sym (curr_sym, &(curr_sym->ts), 1, com_block);
3356 curr_sym = curr_sym->common_next;
3357 } while (curr_sym != NULL);
3363 /* Verify that a given BIND(C) symbol is C interoperable. If it is not,
3364 an appropriate error message is reported. */
3367 verify_bind_c_sym (gfc_symbol *tmp_sym, gfc_typespec *ts,
3368 int is_in_common, gfc_common_head *com_block)
3370 bool bind_c_function = false;
3371 gfc_try retval = SUCCESS;
3373 if (tmp_sym->attr.function && tmp_sym->attr.is_bind_c)
3374 bind_c_function = true;
3376 if (tmp_sym->attr.function && tmp_sym->result != NULL)
3378 tmp_sym = tmp_sym->result;
3379 /* Make sure it wasn't an implicitly typed result. */
3380 if (tmp_sym->attr.implicit_type)
3382 gfc_warning ("Implicitly declared BIND(C) function '%s' at "
3383 "%L may not be C interoperable", tmp_sym->name,
3384 &tmp_sym->declared_at);
3385 tmp_sym->ts.f90_type = tmp_sym->ts.type;
3386 /* Mark it as C interoperable to prevent duplicate warnings. */
3387 tmp_sym->ts.is_c_interop = 1;
3388 tmp_sym->attr.is_c_interop = 1;
3392 /* Here, we know we have the bind(c) attribute, so if we have
3393 enough type info, then verify that it's a C interop kind.
3394 The info could be in the symbol already, or possibly still in
3395 the given ts (current_ts), so look in both. */
3396 if (tmp_sym->ts.type != BT_UNKNOWN || ts->type != BT_UNKNOWN)
3398 if (verify_c_interop (&(tmp_sym->ts)) != SUCCESS)
3400 /* See if we're dealing with a sym in a common block or not. */
3401 if (is_in_common == 1)
3403 gfc_warning ("Variable '%s' in common block '%s' at %L "
3404 "may not be a C interoperable "
3405 "kind though common block '%s' is BIND(C)",
3406 tmp_sym->name, com_block->name,
3407 &(tmp_sym->declared_at), com_block->name);
3411 if (tmp_sym->ts.type == BT_DERIVED || ts->type == BT_DERIVED)
3412 gfc_error ("Type declaration '%s' at %L is not C "
3413 "interoperable but it is BIND(C)",
3414 tmp_sym->name, &(tmp_sym->declared_at));
3416 gfc_warning ("Variable '%s' at %L "
3417 "may not be a C interoperable "
3418 "kind but it is bind(c)",
3419 tmp_sym->name, &(tmp_sym->declared_at));
3423 /* Variables declared w/in a common block can't be bind(c)
3424 since there's no way for C to see these variables, so there's
3425 semantically no reason for the attribute. */
3426 if (is_in_common == 1 && tmp_sym->attr.is_bind_c == 1)
3428 gfc_error ("Variable '%s' in common block '%s' at "
3429 "%L cannot be declared with BIND(C) "
3430 "since it is not a global",
3431 tmp_sym->name, com_block->name,
3432 &(tmp_sym->declared_at));
3436 /* Scalar variables that are bind(c) can not have the pointer
3437 or allocatable attributes. */
3438 if (tmp_sym->attr.is_bind_c == 1)
3440 if (tmp_sym->attr.pointer == 1)
3442 gfc_error ("Variable '%s' at %L cannot have both the "
3443 "POINTER and BIND(C) attributes",
3444 tmp_sym->name, &(tmp_sym->declared_at));
3448 if (tmp_sym->attr.allocatable == 1)
3450 gfc_error ("Variable '%s' at %L cannot have both the "
3451 "ALLOCATABLE and BIND(C) attributes",
3452 tmp_sym->name, &(tmp_sym->declared_at));
3458 /* If it is a BIND(C) function, make sure the return value is a
3459 scalar value. The previous tests in this function made sure
3460 the type is interoperable. */
3461 if (bind_c_function && tmp_sym->as != NULL)
3462 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3463 "be an array", tmp_sym->name, &(tmp_sym->declared_at));
3465 /* BIND(C) functions can not return a character string. */
3466 if (bind_c_function && tmp_sym->ts.type == BT_CHARACTER)
3467 if (tmp_sym->ts.cl == NULL || tmp_sym->ts.cl->length == NULL
3468 || tmp_sym->ts.cl->length->expr_type != EXPR_CONSTANT
3469 || mpz_cmp_si (tmp_sym->ts.cl->length->value.integer, 1) != 0)
3470 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3471 "be a character string", tmp_sym->name,
3472 &(tmp_sym->declared_at));
3475 /* See if the symbol has been marked as private. If it has, make sure
3476 there is no binding label and warn the user if there is one. */
3477 if (tmp_sym->attr.access == ACCESS_PRIVATE
3478 && tmp_sym->binding_label[0] != '\0')
3479 /* Use gfc_warning_now because we won't say that the symbol fails
3480 just because of this. */
3481 gfc_warning_now ("Symbol '%s' at %L is marked PRIVATE but has been "
3482 "given the binding label '%s'", tmp_sym->name,
3483 &(tmp_sym->declared_at), tmp_sym->binding_label);
3489 /* Set the appropriate fields for a symbol that's been declared as
3490 BIND(C) (the is_bind_c flag and the binding label), and verify that
3491 the type is C interoperable. Errors are reported by the functions
3492 used to set/test these fields. */
3495 set_verify_bind_c_sym (gfc_symbol *tmp_sym, int num_idents)
3497 gfc_try retval = SUCCESS;
3499 /* TODO: Do we need to make sure the vars aren't marked private? */
3501 /* Set the is_bind_c bit in symbol_attribute. */
3502 gfc_add_is_bind_c (&(tmp_sym->attr), tmp_sym->name, &gfc_current_locus, 0);
3504 if (set_binding_label (tmp_sym->binding_label, tmp_sym->name,
3505 num_idents) != SUCCESS)
3512 /* Set the fields marking the given common block as BIND(C), including
3513 a binding label, and report any errors encountered. */
3516 set_verify_bind_c_com_block (gfc_common_head *com_block, int num_idents)
3518 gfc_try retval = SUCCESS;
3520 /* destLabel, common name, typespec (which may have binding label). */
3521 if (set_binding_label (com_block->binding_label, com_block->name, num_idents)
3525 /* Set the given common block (com_block) to being bind(c) (1). */
3526 set_com_block_bind_c (com_block, 1);
3532 /* Retrieve the list of one or more identifiers that the given bind(c)
3533 attribute applies to. */
3536 get_bind_c_idents (void)
3538 char name[GFC_MAX_SYMBOL_LEN + 1];
3540 gfc_symbol *tmp_sym = NULL;
3542 gfc_common_head *com_block = NULL;
3544 if (gfc_match_name (name) == MATCH_YES)
3546 found_id = MATCH_YES;
3547 gfc_get_ha_symbol (name, &tmp_sym);
3549 else if (match_common_name (name) == MATCH_YES)
3551 found_id = MATCH_YES;
3552 com_block = gfc_get_common (name, 0);
3556 gfc_error ("Need either entity or common block name for "
3557 "attribute specification statement at %C");
3561 /* Save the current identifier and look for more. */
3564 /* Increment the number of identifiers found for this spec stmt. */
3567 /* Make sure we have a sym or com block, and verify that it can
3568 be bind(c). Set the appropriate field(s) and look for more
3570 if (tmp_sym != NULL || com_block != NULL)
3572 if (tmp_sym != NULL)
3574 if (set_verify_bind_c_sym (tmp_sym, num_idents)
3580 if (set_verify_bind_c_com_block(com_block, num_idents)
3585 /* Look to see if we have another identifier. */
3587 if (gfc_match_eos () == MATCH_YES)
3588 found_id = MATCH_NO;
3589 else if (gfc_match_char (',') != MATCH_YES)
3590 found_id = MATCH_NO;
3591 else if (gfc_match_name (name) == MATCH_YES)
3593 found_id = MATCH_YES;
3594 gfc_get_ha_symbol (name, &tmp_sym);
3596 else if (match_common_name (name) == MATCH_YES)
3598 found_id = MATCH_YES;
3599 com_block = gfc_get_common (name, 0);
3603 gfc_error ("Missing entity or common block name for "
3604 "attribute specification statement at %C");
3610 gfc_internal_error ("Missing symbol");
3612 } while (found_id == MATCH_YES);
3614 /* if we get here we were successful */
3619 /* Try and match a BIND(C) attribute specification statement. */
3622 gfc_match_bind_c_stmt (void)
3624 match found_match = MATCH_NO;
3629 /* This may not be necessary. */
3631 /* Clear the temporary binding label holder. */
3632 curr_binding_label[0] = '\0';
3634 /* Look for the bind(c). */
3635 found_match = gfc_match_bind_c (NULL, true);
3637 if (found_match == MATCH_YES)
3639 /* Look for the :: now, but it is not required. */
3642 /* Get the identifier(s) that needs to be updated. This may need to
3643 change to hand the flag(s) for the attr specified so all identifiers
3644 found can have all appropriate parts updated (assuming that the same
3645 spec stmt can have multiple attrs, such as both bind(c) and
3647 if (get_bind_c_idents () != SUCCESS)
3648 /* Error message should have printed already. */
3656 /* Match a data declaration statement. */
3659 gfc_match_data_decl (void)
3665 num_idents_on_line = 0;
3667 m = gfc_match_type_spec (¤t_ts, 0);
3671 if (current_ts.type == BT_DERIVED && gfc_current_state () != COMP_DERIVED)
3673 sym = gfc_use_derived (current_ts.derived);
3681 current_ts.derived = sym;
3684 m = match_attr_spec ();
3685 if (m == MATCH_ERROR)
3691 if (current_ts.type == BT_DERIVED && current_ts.derived->components == NULL
3692 && !current_ts.derived->attr.zero_comp)
3695 if (current_attr.pointer && gfc_current_state () == COMP_DERIVED)
3698 gfc_find_symbol (current_ts.derived->name,
3699 current_ts.derived->ns->parent, 1, &sym);
3701 /* Any symbol that we find had better be a type definition
3702 which has its components defined. */
3703 if (sym != NULL && sym->attr.flavor == FL_DERIVED
3704 && (current_ts.derived->components != NULL
3705 || current_ts.derived->attr.zero_comp))
3708 /* Now we have an error, which we signal, and then fix up
3709 because the knock-on is plain and simple confusing. */
3710 gfc_error_now ("Derived type at %C has not been previously defined "
3711 "and so cannot appear in a derived type definition");
3712 current_attr.pointer = 1;
3717 /* If we have an old-style character declaration, and no new-style
3718 attribute specifications, then there a comma is optional between
3719 the type specification and the variable list. */
3720 if (m == MATCH_NO && current_ts.type == BT_CHARACTER && old_char_selector)
3721 gfc_match_char (',');
3723 /* Give the types/attributes to symbols that follow. Give the element
3724 a number so that repeat character length expressions can be copied. */
3728 num_idents_on_line++;
3729 m = variable_decl (elem++);
3730 if (m == MATCH_ERROR)
3735 if (gfc_match_eos () == MATCH_YES)
3737 if (gfc_match_char (',') != MATCH_YES)
3741 if (gfc_error_flag_test () == 0)
3742 gfc_error ("Syntax error in data declaration at %C");
3745 gfc_free_data_all (gfc_current_ns);
3748 gfc_free_array_spec (current_as);
3754 /* Match a prefix associated with a function or subroutine
3755 declaration. If the typespec pointer is nonnull, then a typespec
3756 can be matched. Note that if nothing matches, MATCH_YES is
3757 returned (the null string was matched). */
3760 gfc_match_prefix (gfc_typespec *ts)
3764 gfc_clear_attr (¤t_attr);
3767 gcc_assert (!gfc_matching_prefix);
3768 gfc_matching_prefix = true;
3771 if (!seen_type && ts != NULL
3772 && gfc_match_type_spec (ts, 0) == MATCH_YES
3773 && gfc_match_space () == MATCH_YES)
3780 if (gfc_match ("elemental% ") == MATCH_YES)
3782 if (gfc_add_elemental (¤t_attr, NULL) == FAILURE)
3788 if (gfc_match ("pure% ") == MATCH_YES)
3790 if (gfc_add_pure (¤t_attr, NULL) == FAILURE)
3796 if (gfc_match ("recursive% ") == MATCH_YES)
3798 if (gfc_add_recursive (¤t_attr, NULL) == FAILURE)
3804 /* At this point, the next item is not a prefix. */
3805 gcc_assert (gfc_matching_prefix);
3806 gfc_matching_prefix = false;
3810 gcc_assert (gfc_matching_prefix);
3811 gfc_matching_prefix = false;
3816 /* Copy attributes matched by gfc_match_prefix() to attributes on a symbol. */
3819 copy_prefix (symbol_attribute *dest, locus *where)
3821 if (current_attr.pure && gfc_add_pure (dest, where) == FAILURE)
3824 if (current_attr.elemental && gfc_add_elemental (dest, where) == FAILURE)
3827 if (current_attr.recursive && gfc_add_recursive (dest, where) == FAILURE)
3834 /* Match a formal argument list. */
3837 gfc_match_formal_arglist (gfc_symbol *progname, int st_flag, int null_flag)
3839 gfc_formal_arglist *head, *tail, *p, *q;
3840 char name[GFC_MAX_SYMBOL_LEN + 1];
3846 if (gfc_match_char ('(') != MATCH_YES)
3853 if (gfc_match_char (')') == MATCH_YES)
3858 if (gfc_match_char ('*') == MATCH_YES)
3862 m = gfc_match_name (name);
3866 if (gfc_get_symbol (name, NULL, &sym))
3870 p = gfc_get_formal_arglist ();
3882 /* We don't add the VARIABLE flavor because the name could be a
3883 dummy procedure. We don't apply these attributes to formal
3884 arguments of statement functions. */
3885 if (sym != NULL && !st_flag
3886 && (gfc_add_dummy (&sym->attr, sym->name, NULL) == FAILURE
3887 || gfc_missing_attr (&sym->attr, NULL) == FAILURE))
3893 /* The name of a program unit can be in a different namespace,
3894 so check for it explicitly. After the statement is accepted,
3895 the name is checked for especially in gfc_get_symbol(). */
3896 if (gfc_new_block != NULL && sym != NULL
3897 && strcmp (sym->name, gfc_new_block->name) == 0)
3899 gfc_error ("Name '%s' at %C is the name of the procedure",
3905 if (gfc_match_char (')') == MATCH_YES)
3908 m = gfc_match_char (',');
3911 gfc_error ("Unexpected junk in formal argument list at %C");
3917 /* Check for duplicate symbols in the formal argument list. */
3920 for (p = head; p->next; p = p->next)
3925 for (q = p->next; q; q = q->next)
3926 if (p->sym == q->sym)
3928 gfc_error ("Duplicate symbol '%s' in formal argument list "
3929 "at %C", p->sym->name);
3937 if (gfc_add_explicit_interface (progname, IFSRC_DECL, head, NULL)
3947 gfc_free_formal_arglist (head);
3952 /* Match a RESULT specification following a function declaration or
3953 ENTRY statement. Also matches the end-of-statement. */
3956 match_result (gfc_symbol *function, gfc_symbol **result)
3958 char name[GFC_MAX_SYMBOL_LEN + 1];
3962 if (gfc_match (" result (") != MATCH_YES)
3965 m = gfc_match_name (name);
3969 /* Get the right paren, and that's it because there could be the
3970 bind(c) attribute after the result clause. */
3971 if (gfc_match_char(')') != MATCH_YES)
3973 /* TODO: should report the missing right paren here. */
3977 if (strcmp (function->name, name) == 0)
3979 gfc_error ("RESULT variable at %C must be different than function name");
3983 if (gfc_get_symbol (name, NULL, &r))
3986 if (gfc_add_result (&r->attr, r->name, NULL) == FAILURE)
3995 /* Match a function suffix, which could be a combination of a result
3996 clause and BIND(C), either one, or neither. The draft does not
3997 require them to come in a specific order. */
4000 gfc_match_suffix (gfc_symbol *sym, gfc_symbol **result)
4002 match is_bind_c; /* Found bind(c). */
4003 match is_result; /* Found result clause. */
4004 match found_match; /* Status of whether we've found a good match. */
4005 char peek_char; /* Character we're going to peek at. */
4006 bool allow_binding_name;
4008 /* Initialize to having found nothing. */
4009 found_match = MATCH_NO;
4010 is_bind_c = MATCH_NO;
4011 is_result = MATCH_NO;
4013 /* Get the next char to narrow between result and bind(c). */
4014 gfc_gobble_whitespace ();
4015 peek_char = gfc_peek_ascii_char ();
4017 /* C binding names are not allowed for internal procedures. */
4018 if (gfc_current_state () == COMP_CONTAINS
4019 && sym->ns->proc_name->attr.flavor != FL_MODULE)
4020 allow_binding_name = false;
4022 allow_binding_name = true;
4027 /* Look for result clause. */
4028 is_result = match_result (sym, result);
4029 if (is_result == MATCH_YES)
4031 /* Now see if there is a bind(c) after it. */
4032 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
4033 /* We've found the result clause and possibly bind(c). */
4034 found_match = MATCH_YES;
4037 /* This should only be MATCH_ERROR. */
4038 found_match = is_result;
4041 /* Look for bind(c) first. */
4042 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
4043 if (is_bind_c == MATCH_YES)
4045 /* Now see if a result clause followed it. */
4046 is_result = match_result (sym, result);
4047 found_match = MATCH_YES;
4051 /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */
4052 found_match = MATCH_ERROR;
4056 gfc_error ("Unexpected junk after function declaration at %C");
4057 found_match = MATCH_ERROR;
4061 if (is_bind_c == MATCH_YES)
4063 /* Fortran 2008 draft allows BIND(C) for internal procedures. */
4064 if (gfc_current_state () == COMP_CONTAINS
4065 && sym->ns->proc_name->attr.flavor != FL_MODULE
4066 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute "
4067 "at %L may not be specified for an internal "
4068 "procedure", &gfc_current_locus)
4072 if (gfc_add_is_bind_c (&(sym->attr), sym->name, &gfc_current_locus, 1)
4081 /* Procedure pointer return value without RESULT statement:
4082 Add "hidden" result variable named "ppr@". */
4085 add_hidden_procptr_result (gfc_symbol *sym)
4089 if (gfc_notification_std (GFC_STD_F2003) == ERROR)
4092 /* First usage case: PROCEDURE and EXTERNAL statements. */
4093 case1 = gfc_current_state () == COMP_FUNCTION && gfc_current_block ()
4094 && strcmp (gfc_current_block ()->name, sym->name) == 0
4095 && sym->attr.external;
4096 /* Second usage case: INTERFACE statements. */
4097 case2 = gfc_current_state () == COMP_INTERFACE && gfc_state_stack->previous
4098 && gfc_state_stack->previous->state == COMP_FUNCTION
4099 && strcmp (gfc_state_stack->previous->sym->name, sym->name) == 0;
4105 gfc_get_sym_tree ("ppr@", gfc_current_ns, &stree, false);
4109 gfc_get_sym_tree ("ppr@", gfc_current_ns->parent, &stree, false);
4110 st2 = gfc_new_symtree (&gfc_current_ns->sym_root, "ppr@");
4111 st2->n.sym = stree->n.sym;
4113 sym->result = stree->n.sym;
4115 sym->result->attr.proc_pointer = sym->attr.proc_pointer;
4116 sym->result->attr.pointer = sym->attr.pointer;
4117 sym->result->attr.external = sym->attr.external;
4118 sym->result->attr.referenced = sym->attr.referenced;
4119 sym->result->ts = sym->ts;
4120 sym->attr.proc_pointer = 0;
4121 sym->attr.pointer = 0;
4122 sym->attr.external = 0;
4123 if (sym->result->attr.external && sym->result->attr.pointer)
4125 sym->result->attr.pointer = 0;
4126 sym->result->attr.proc_pointer = 1;
4129 return gfc_add_result (&sym->result->attr, sym->result->name, NULL);
4131 /* POINTER after PROCEDURE/EXTERNAL/INTERFACE statement. */
4132 else if (sym->attr.function && !sym->attr.external && sym->attr.pointer
4133 && sym->result && sym->result != sym && sym->result->attr.external
4134 && sym == gfc_current_ns->proc_name
4135 && sym == sym->result->ns->proc_name
4136 && strcmp ("ppr@", sym->result->name) == 0)
4138 sym->result->attr.proc_pointer = 1;
4139 sym->attr.pointer = 0;
4147 /* Match the interface for a PROCEDURE declaration,
4148 including brackets (R1212). */
4151 match_procedure_interface (gfc_symbol **proc_if)
4155 locus old_loc, entry_loc;
4156 gfc_namespace *old_ns = gfc_current_ns;
4157 char name[GFC_MAX_SYMBOL_LEN + 1];
4159 old_loc = entry_loc = gfc_current_locus;
4160 gfc_clear_ts (¤t_ts);
4162 if (gfc_match (" (") != MATCH_YES)
4164 gfc_current_locus = entry_loc;
4168 /* Get the type spec. for the procedure interface. */
4169 old_loc = gfc_current_locus;
4170 m = gfc_match_type_spec (¤t_ts, 0);
4171 gfc_gobble_whitespace ();
4172 if (m == MATCH_YES || (m == MATCH_NO && gfc_peek_ascii_char () == ')'))
4175 if (m == MATCH_ERROR)
4178 /* Procedure interface is itself a procedure. */
4179 gfc_current_locus = old_loc;
4180 m = gfc_match_name (name);
4182 /* First look to see if it is already accessible in the current
4183 namespace because it is use associated or contained. */
4185 if (gfc_find_sym_tree (name, NULL, 0, &st))
4188 /* If it is still not found, then try the parent namespace, if it
4189 exists and create the symbol there if it is still not found. */
4190 if (gfc_current_ns->parent)
4191 gfc_current_ns = gfc_current_ns->parent;
4192 if (st == NULL && gfc_get_ha_sym_tree (name, &st))
4195 gfc_current_ns = old_ns;
4196 *proc_if = st->n.sym;
4198 /* Various interface checks. */
4202 /* Resolve interface if possible. That way, attr.procedure is only set
4203 if it is declared by a later procedure-declaration-stmt, which is
4204 invalid per C1212. */
4205 while ((*proc_if)->ts.interface)
4206 *proc_if = (*proc_if)->ts.interface;
4208 if ((*proc_if)->generic)
4210 gfc_error ("Interface '%s' at %C may not be generic",
4214 if ((*proc_if)->attr.proc == PROC_ST_FUNCTION)
4216 gfc_error ("Interface '%s' at %C may not be a statement function",
4220 /* Handle intrinsic procedures. */
4221 if (!((*proc_if)->attr.external || (*proc_if)->attr.use_assoc
4222 || (*proc_if)->attr.if_source == IFSRC_IFBODY)
4223 && (gfc_is_intrinsic ((*proc_if), 0, gfc_current_locus)
4224 || gfc_is_intrinsic ((*proc_if), 1, gfc_current_locus)))
4225 (*proc_if)->attr.intrinsic = 1;
4226 if ((*proc_if)->attr.intrinsic
4227 && !gfc_intrinsic_actual_ok ((*proc_if)->name, 0))
4229 gfc_error ("Intrinsic procedure '%s' not allowed "
4230 "in PROCEDURE statement at %C", (*proc_if)->name);
4236 if (gfc_match (" )") != MATCH_YES)
4238 gfc_current_locus = entry_loc;
4246 /* Match a PROCEDURE declaration (R1211). */
4249 match_procedure_decl (void)
4252 gfc_symbol *sym, *proc_if = NULL;
4254 gfc_expr *initializer = NULL;
4256 /* Parse interface (with brackets). */
4257 m = match_procedure_interface (&proc_if);
4261 /* Parse attributes (with colons). */
4262 m = match_attr_spec();
4263 if (m == MATCH_ERROR)
4266 /* Get procedure symbols. */
4269 m = gfc_match_symbol (&sym, 0);
4272 else if (m == MATCH_ERROR)
4275 /* Add current_attr to the symbol attributes. */
4276 if (gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE)
4279 if (sym->attr.is_bind_c)
4281 /* Check for C1218. */
4282 if (!proc_if || !proc_if->attr.is_bind_c)
4284 gfc_error ("BIND(C) attribute at %C requires "
4285 "an interface with BIND(C)");
4288 /* Check for C1217. */
4289 if (has_name_equals && sym->attr.pointer)
4291 gfc_error ("BIND(C) procedure with NAME may not have "
4292 "POINTER attribute at %C");
4295 if (has_name_equals && sym->attr.dummy)
4297 gfc_error ("Dummy procedure at %C may not have "
4298 "BIND(C) attribute with NAME");
4301 /* Set binding label for BIND(C). */
4302 if (set_binding_label (sym->binding_label, sym->name, num) != SUCCESS)
4306 if (gfc_add_external (&sym->attr, NULL) == FAILURE)
4309 if (add_hidden_procptr_result (sym) == SUCCESS)
4312 if (gfc_add_proc (&sym->attr, sym->name, NULL) == FAILURE)
4315 /* Set interface. */
4316 if (proc_if != NULL)
4318 if (sym->ts.type != BT_UNKNOWN)
4320 gfc_error ("Procedure '%s' at %L already has basic type of %s",
4321 sym->name, &gfc_current_locus,
4322 gfc_basic_typename (sym->ts.type));
4325 sym->ts.interface = proc_if;
4326 sym->attr.untyped = 1;
4327 sym->attr.if_source = IFSRC_IFBODY;
4329 else if (current_ts.type != BT_UNKNOWN)
4331 if (gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE)
4333 sym->ts.interface = gfc_new_symbol ("", gfc_current_ns);
4334 sym->ts.interface->ts = current_ts;
4335 sym->ts.interface->attr.function = 1;
4336 sym->attr.function = sym->ts.interface->attr.function;
4337 sym->attr.if_source = IFSRC_UNKNOWN;
4340 if (gfc_match (" =>") == MATCH_YES)
4342 if (!current_attr.pointer)
4344 gfc_error ("Initialization at %C isn't for a pointer variable");
4349 m = gfc_match_null (&initializer);
4352 gfc_error ("Pointer initialization requires a NULL() at %C");
4356 if (gfc_pure (NULL))
4358 gfc_error ("Initialization of pointer at %C is not allowed in "
4359 "a PURE procedure");
4366 if (add_init_expr_to_sym (sym->name, &initializer, &gfc_current_locus)
4372 gfc_set_sym_referenced (sym);
4374 if (gfc_match_eos () == MATCH_YES)
4376 if (gfc_match_char (',') != MATCH_YES)
4381 gfc_error ("Syntax error in PROCEDURE statement at %C");
4385 /* Free stuff up and return. */
4386 gfc_free_expr (initializer);
4392 match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc);
4395 /* Match a procedure pointer component declaration (R445). */
4398 match_ppc_decl (void)
4401 gfc_symbol *proc_if = NULL;
4405 gfc_expr *initializer = NULL;
4406 gfc_typebound_proc* tb;
4407 char name[GFC_MAX_SYMBOL_LEN + 1];
4409 /* Parse interface (with brackets). */
4410 m = match_procedure_interface (&proc_if);
4414 /* Parse attributes. */
4415 tb = XCNEW (gfc_typebound_proc);
4416 tb->where = gfc_current_locus;
4417 m = match_binding_attributes (tb, false, true);
4418 if (m == MATCH_ERROR)
4421 gfc_clear_attr (¤t_attr);
4422 current_attr.procedure = 1;
4423 current_attr.proc_pointer = 1;
4424 current_attr.access = tb->access;
4425 current_attr.flavor = FL_PROCEDURE;
4427 /* Match the colons (required). */
4428 if (gfc_match (" ::") != MATCH_YES)
4430 gfc_error ("Expected '::' after binding-attributes at %C");
4434 /* Check for C450. */
4435 if (!tb->nopass && proc_if == NULL)
4437 gfc_error("NOPASS or explicit interface required at %C");
4441 /* Match PPC names. */
4445 m = gfc_match_name (name);
4448 else if (m == MATCH_ERROR)
4451 if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE)
4454 /* Add current_attr to the symbol attributes. */
4455 if (gfc_copy_attr (&c->attr, ¤t_attr, NULL) == FAILURE)
4458 if (gfc_add_external (&c->attr, NULL) == FAILURE)
4461 if (gfc_add_proc (&c->attr, name, NULL) == FAILURE)
4466 /* Set interface. */
4467 if (proc_if != NULL)
4469 c->ts.interface = proc_if;
4470 c->attr.untyped = 1;
4471 c->attr.if_source = IFSRC_IFBODY;
4473 else if (ts.type != BT_UNKNOWN)
4476 c->ts.interface = gfc_new_symbol ("", gfc_current_ns);
4477 c->ts.interface->ts = ts;
4478 c->ts.interface->attr.function = 1;
4479 c->attr.function = c->ts.interface->attr.function;
4480 c->attr.if_source = IFSRC_UNKNOWN;
4483 if (gfc_match (" =>") == MATCH_YES)
4485 m = gfc_match_null (&initializer);
4488 gfc_error ("Pointer initialization requires a NULL() at %C");
4491 if (gfc_pure (NULL))
4493 gfc_error ("Initialization of pointer at %C is not allowed in "
4494 "a PURE procedure");
4499 gfc_free_expr (initializer);
4502 c->initializer = initializer;
4505 if (gfc_match_eos () == MATCH_YES)
4507 if (gfc_match_char (',') != MATCH_YES)
4512 gfc_error ("Syntax error in procedure pointer component at %C");
4517 /* Match a PROCEDURE declaration inside an interface (R1206). */
4520 match_procedure_in_interface (void)
4524 char name[GFC_MAX_SYMBOL_LEN + 1];
4526 if (current_interface.type == INTERFACE_NAMELESS
4527 || current_interface.type == INTERFACE_ABSTRACT)
4529 gfc_error ("PROCEDURE at %C must be in a generic interface");
4535 m = gfc_match_name (name);
4538 else if (m == MATCH_ERROR)
4540 if (gfc_get_symbol (name, gfc_current_ns->parent, &sym))
4543 if (gfc_add_interface (sym) == FAILURE)
4546 if (gfc_match_eos () == MATCH_YES)
4548 if (gfc_match_char (',') != MATCH_YES)
4555 gfc_error ("Syntax error in PROCEDURE statement at %C");
4560 /* General matcher for PROCEDURE declarations. */
4562 static match match_procedure_in_type (void);
4565 gfc_match_procedure (void)
4569 switch (gfc_current_state ())
4574 case COMP_SUBROUTINE:
4576 m = match_procedure_decl ();
4578 case COMP_INTERFACE:
4579 m = match_procedure_in_interface ();
4582 m = match_ppc_decl ();
4584 case COMP_DERIVED_CONTAINS:
4585 m = match_procedure_in_type ();
4594 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROCEDURE statement at %C")
4602 /* Warn if a matched procedure has the same name as an intrinsic; this is
4603 simply a wrapper around gfc_warn_intrinsic_shadow that interprets the current
4604 parser-state-stack to find out whether we're in a module. */
4607 warn_intrinsic_shadow (const gfc_symbol* sym, bool func)
4611 in_module = (gfc_state_stack->previous
4612 && gfc_state_stack->previous->state == COMP_MODULE);
4614 gfc_warn_intrinsic_shadow (sym, in_module, func);
4618 /* Match a function declaration. */
4621 gfc_match_function_decl (void)
4623 char name[GFC_MAX_SYMBOL_LEN + 1];
4624 gfc_symbol *sym, *result;
4628 match found_match; /* Status returned by match func. */
4630 if (gfc_current_state () != COMP_NONE
4631 && gfc_current_state () != COMP_INTERFACE
4632 && gfc_current_state () != COMP_CONTAINS)
4635 gfc_clear_ts (¤t_ts);
4637 old_loc = gfc_current_locus;
4639 m = gfc_match_prefix (¤t_ts);
4642 gfc_current_locus = old_loc;
4646 if (gfc_match ("function% %n", name) != MATCH_YES)
4648 gfc_current_locus = old_loc;
4651 if (get_proc_name (name, &sym, false))
4654 if (add_hidden_procptr_result (sym) == SUCCESS)
4657 gfc_new_block = sym;
4659 m = gfc_match_formal_arglist (sym, 0, 0);
4662 gfc_error ("Expected formal argument list in function "
4663 "definition at %C");
4667 else if (m == MATCH_ERROR)
4672 /* According to the draft, the bind(c) and result clause can
4673 come in either order after the formal_arg_list (i.e., either
4674 can be first, both can exist together or by themselves or neither
4675 one). Therefore, the match_result can't match the end of the
4676 string, and check for the bind(c) or result clause in either order. */
4677 found_match = gfc_match_eos ();
4679 /* Make sure that it isn't already declared as BIND(C). If it is, it
4680 must have been marked BIND(C) with a BIND(C) attribute and that is
4681 not allowed for procedures. */
4682 if (sym->attr.is_bind_c == 1)
4684 sym->attr.is_bind_c = 0;
4685 if (sym->old_symbol != NULL)
4686 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4687 "variables or common blocks",
4688 &(sym->old_symbol->declared_at));
4690 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4691 "variables or common blocks", &gfc_current_locus);
4694 if (found_match != MATCH_YES)
4696 /* If we haven't found the end-of-statement, look for a suffix. */
4697 suffix_match = gfc_match_suffix (sym, &result);
4698 if (suffix_match == MATCH_YES)
4699 /* Need to get the eos now. */
4700 found_match = gfc_match_eos ();
4702 found_match = suffix_match;
4705 if(found_match != MATCH_YES)
4709 /* Make changes to the symbol. */
4712 if (gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE)
4715 if (gfc_missing_attr (&sym->attr, NULL) == FAILURE
4716 || copy_prefix (&sym->attr, &sym->declared_at) == FAILURE)
4719 /* Delay matching the function characteristics until after the
4720 specification block by signalling kind=-1. */
4721 sym->declared_at = old_loc;
4722 if (current_ts.type != BT_UNKNOWN)
4723 current_ts.kind = -1;
4725 current_ts.kind = 0;
4729 if (current_ts.type != BT_UNKNOWN
4730 && gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE)
4736 if (current_ts.type != BT_UNKNOWN
4737 && gfc_add_type (result, ¤t_ts, &gfc_current_locus)
4740 sym->result = result;
4743 /* Warn if this procedure has the same name as an intrinsic. */
4744 warn_intrinsic_shadow (sym, true);
4750 gfc_current_locus = old_loc;
4755 /* This is mostly a copy of parse.c(add_global_procedure) but modified to
4756 pass the name of the entry, rather than the gfc_current_block name, and
4757 to return false upon finding an existing global entry. */
4760 add_global_entry (const char *name, int sub)
4763 enum gfc_symbol_type type;
4765 s = gfc_get_gsymbol(name);
4766 type = sub ? GSYM_SUBROUTINE : GSYM_FUNCTION;
4769 || (s->type != GSYM_UNKNOWN
4770 && s->type != type))
4771 gfc_global_used(s, NULL);
4775 s->where = gfc_current_locus;
4777 s->ns = gfc_current_ns;
4784 /* Match an ENTRY statement. */
4787 gfc_match_entry (void)
4792 char name[GFC_MAX_SYMBOL_LEN + 1];
4793 gfc_compile_state state;
4797 bool module_procedure;
4801 m = gfc_match_name (name);
4805 state = gfc_current_state ();
4806 if (state != COMP_SUBROUTINE && state != COMP_FUNCTION)
4811 gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM");
4814 gfc_error ("ENTRY statement at %C cannot appear within a MODULE");
4816 case COMP_BLOCK_DATA:
4817 gfc_error ("ENTRY statement at %C cannot appear within "
4820 case COMP_INTERFACE:
4821 gfc_error ("ENTRY statement at %C cannot appear within "
4825 gfc_error ("ENTRY statement at %C cannot appear within "
4826 "a DERIVED TYPE block");
4829 gfc_error ("ENTRY statement at %C cannot appear within "
4830 "an IF-THEN block");
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 "
4849 gfc_error ("ENTRY statement at %C cannot appear within "
4850 "a contained subprogram");
4853 gfc_internal_error ("gfc_match_entry(): Bad state");
4858 module_procedure = gfc_current_ns->parent != NULL
4859 && gfc_current_ns->parent->proc_name
4860 && gfc_current_ns->parent->proc_name->attr.flavor
4863 if (gfc_current_ns->parent != NULL
4864 && gfc_current_ns->parent->proc_name
4865 && !module_procedure)
4867 gfc_error("ENTRY statement at %C cannot appear in a "
4868 "contained procedure");
4872 /* Module function entries need special care in get_proc_name
4873 because previous references within the function will have
4874 created symbols attached to the current namespace. */
4875 if (get_proc_name (name, &entry,
4876 gfc_current_ns->parent != NULL
4877 && module_procedure))
4880 proc = gfc_current_block ();
4882 /* Make sure that it isn't already declared as BIND(C). If it is, it
4883 must have been marked BIND(C) with a BIND(C) attribute and that is
4884 not allowed for procedures. */
4885 if (entry->attr.is_bind_c == 1)
4887 entry->attr.is_bind_c = 0;
4888 if (entry->old_symbol != NULL)
4889 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4890 "variables or common blocks",
4891 &(entry->old_symbol->declared_at));
4893 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4894 "variables or common blocks", &gfc_current_locus);
4897 /* Check what next non-whitespace character is so we can tell if there
4898 is the required parens if we have a BIND(C). */
4899 gfc_gobble_whitespace ();
4900 peek_char = gfc_peek_ascii_char ();
4902 if (state == COMP_SUBROUTINE)
4904 /* An entry in a subroutine. */
4905 if (!gfc_current_ns->parent && !add_global_entry (name, 1))
4908 m = gfc_match_formal_arglist (entry, 0, 1);
4912 /* Call gfc_match_bind_c with allow_binding_name = true as ENTRY can
4913 never be an internal procedure. */
4914 is_bind_c = gfc_match_bind_c (entry, true);
4915 if (is_bind_c == MATCH_ERROR)
4917 if (is_bind_c == MATCH_YES)
4919 if (peek_char != '(')
4921 gfc_error ("Missing required parentheses before BIND(C) at %C");
4924 if (gfc_add_is_bind_c (&(entry->attr), entry->name, &(entry->declared_at), 1)
4929 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
4930 || gfc_add_subroutine (&entry->attr, entry->name, NULL) == FAILURE)
4935 /* An entry in a function.
4936 We need to take special care because writing
4941 ENTRY f() RESULT (r)
4943 ENTRY f RESULT (r). */
4944 if (!gfc_current_ns->parent && !add_global_entry (name, 0))
4947 old_loc = gfc_current_locus;
4948 if (gfc_match_eos () == MATCH_YES)
4950 gfc_current_locus = old_loc;
4951 /* Match the empty argument list, and add the interface to
4953 m = gfc_match_formal_arglist (entry, 0, 1);
4956 m = gfc_match_formal_arglist (entry, 0, 0);
4963 if (gfc_match_eos () == MATCH_YES)
4965 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
4966 || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE)
4969 entry->result = entry;
4973 m = gfc_match_suffix (entry, &result);
4975 gfc_syntax_error (ST_ENTRY);
4981 if (gfc_add_result (&result->attr, result->name, NULL) == FAILURE
4982 || gfc_add_entry (&entry->attr, result->name, NULL) == FAILURE
4983 || gfc_add_function (&entry->attr, result->name, NULL)
4986 entry->result = result;
4990 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
4991 || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE)
4993 entry->result = entry;
4998 if (gfc_match_eos () != MATCH_YES)
5000 gfc_syntax_error (ST_ENTRY);
5004 entry->attr.recursive = proc->attr.recursive;
5005 entry->attr.elemental = proc->attr.elemental;
5006 entry->attr.pure = proc->attr.pure;
5008 el = gfc_get_entry_list ();
5010 el->next = gfc_current_ns->entries;
5011 gfc_current_ns->entries = el;
5013 el->id = el->next->id + 1;
5017 new_st.op = EXEC_ENTRY;
5018 new_st.ext.entry = el;
5024 /* Match a subroutine statement, including optional prefixes. */
5027 gfc_match_subroutine (void)
5029 char name[GFC_MAX_SYMBOL_LEN + 1];
5034 bool allow_binding_name;
5036 if (gfc_current_state () != COMP_NONE
5037 && gfc_current_state () != COMP_INTERFACE
5038 && gfc_current_state () != COMP_CONTAINS)
5041 m = gfc_match_prefix (NULL);
5045 m = gfc_match ("subroutine% %n", name);
5049 if (get_proc_name (name, &sym, false))
5052 if (add_hidden_procptr_result (sym) == SUCCESS)
5055 gfc_new_block = sym;
5057 /* Check what next non-whitespace character is so we can tell if there
5058 is the required parens if we have a BIND(C). */
5059 gfc_gobble_whitespace ();
5060 peek_char = gfc_peek_ascii_char ();
5062 if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE)
5065 if (gfc_match_formal_arglist (sym, 0, 1) != MATCH_YES)
5068 /* Make sure that it isn't already declared as BIND(C). If it is, it
5069 must have been marked BIND(C) with a BIND(C) attribute and that is
5070 not allowed for procedures. */
5071 if (sym->attr.is_bind_c == 1)
5073 sym->attr.is_bind_c = 0;
5074 if (sym->old_symbol != NULL)
5075 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5076 "variables or common blocks",
5077 &(sym->old_symbol->declared_at));
5079 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5080 "variables or common blocks", &gfc_current_locus);
5083 /* C binding names are not allowed for internal procedures. */
5084 if (gfc_current_state () == COMP_CONTAINS
5085 && sym->ns->proc_name->attr.flavor != FL_MODULE)
5086 allow_binding_name = false;
5088 allow_binding_name = true;
5090 /* Here, we are just checking if it has the bind(c) attribute, and if
5091 so, then we need to make sure it's all correct. If it doesn't,
5092 we still need to continue matching the rest of the subroutine line. */
5093 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
5094 if (is_bind_c == MATCH_ERROR)
5096 /* There was an attempt at the bind(c), but it was wrong. An
5097 error message should have been printed w/in the gfc_match_bind_c
5098 so here we'll just return the MATCH_ERROR. */
5102 if (is_bind_c == MATCH_YES)
5104 /* The following is allowed in the Fortran 2008 draft. */
5105 if (gfc_current_state () == COMP_CONTAINS
5106 && sym->ns->proc_name->attr.flavor != FL_MODULE
5107 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute "
5108 "at %L may not be specified for an internal "
5109 "procedure", &gfc_current_locus)
5113 if (peek_char != '(')
5115 gfc_error ("Missing required parentheses before BIND(C) at %C");
5118 if (gfc_add_is_bind_c (&(sym->attr), sym->name, &(sym->declared_at), 1)
5123 if (gfc_match_eos () != MATCH_YES)
5125 gfc_syntax_error (ST_SUBROUTINE);
5129 if (copy_prefix (&sym->attr, &sym->declared_at) == FAILURE)
5132 /* Warn if it has the same name as an intrinsic. */
5133 warn_intrinsic_shadow (sym, false);
5139 /* Match a BIND(C) specifier, with the optional 'name=' specifier if
5140 given, and set the binding label in either the given symbol (if not
5141 NULL), or in the current_ts. The symbol may be NULL because we may
5142 encounter the BIND(C) before the declaration itself. Return
5143 MATCH_NO if what we're looking at isn't a BIND(C) specifier,
5144 MATCH_ERROR if it is a BIND(C) clause but an error was encountered,
5145 or MATCH_YES if the specifier was correct and the binding label and
5146 bind(c) fields were set correctly for the given symbol or the
5147 current_ts. If allow_binding_name is false, no binding name may be
5151 gfc_match_bind_c (gfc_symbol *sym, bool allow_binding_name)
5153 /* binding label, if exists */
5154 char binding_label[GFC_MAX_SYMBOL_LEN + 1];
5158 /* Initialize the flag that specifies whether we encountered a NAME=
5159 specifier or not. */
5160 has_name_equals = 0;
5162 /* Init the first char to nil so we can catch if we don't have
5163 the label (name attr) or the symbol name yet. */
5164 binding_label[0] = '\0';
5166 /* This much we have to be able to match, in this order, if
5167 there is a bind(c) label. */
5168 if (gfc_match (" bind ( c ") != MATCH_YES)
5171 /* Now see if there is a binding label, or if we've reached the
5172 end of the bind(c) attribute without one. */
5173 if (gfc_match_char (',') == MATCH_YES)
5175 if (gfc_match (" name = ") != MATCH_YES)
5177 gfc_error ("Syntax error in NAME= specifier for binding label "
5179 /* should give an error message here */
5183 has_name_equals = 1;
5185 /* Get the opening quote. */
5186 double_quote = MATCH_YES;
5187 single_quote = MATCH_YES;
5188 double_quote = gfc_match_char ('"');
5189 if (double_quote != MATCH_YES)
5190 single_quote = gfc_match_char ('\'');
5191 if (double_quote != MATCH_YES && single_quote != MATCH_YES)
5193 gfc_error ("Syntax error in NAME= specifier for binding label "
5198 /* Grab the binding label, using functions that will not lower
5199 case the names automatically. */
5200 if (gfc_match_name_C (binding_label) != MATCH_YES)
5203 /* Get the closing quotation. */
5204 if (double_quote == MATCH_YES)
5206 if (gfc_match_char ('"') != MATCH_YES)
5208 gfc_error ("Missing closing quote '\"' for binding label at %C");
5209 /* User started string with '"' so looked to match it. */
5215 if (gfc_match_char ('\'') != MATCH_YES)
5217 gfc_error ("Missing closing quote '\'' for binding label at %C");
5218 /* User started string with "'" char. */
5224 /* Get the required right paren. */
5225 if (gfc_match_char (')') != MATCH_YES)
5227 gfc_error ("Missing closing paren for binding label at %C");
5231 if (has_name_equals && !allow_binding_name)
5233 gfc_error ("No binding name is allowed in BIND(C) at %C");
5237 if (has_name_equals && sym != NULL && sym->attr.dummy)
5239 gfc_error ("For dummy procedure %s, no binding name is "
5240 "allowed in BIND(C) at %C", sym->name);
5245 /* Save the binding label to the symbol. If sym is null, we're
5246 probably matching the typespec attributes of a declaration and
5247 haven't gotten the name yet, and therefore, no symbol yet. */
5248 if (binding_label[0] != '\0')
5252 strcpy (sym->binding_label, binding_label);
5255 strcpy (curr_binding_label, binding_label);
5257 else if (allow_binding_name)
5259 /* No binding label, but if symbol isn't null, we
5260 can set the label for it here.
5261 If name="" or allow_binding_name is false, no C binding name is
5263 if (sym != NULL && sym->name != NULL && has_name_equals == 0)
5264 strncpy (sym->binding_label, sym->name, strlen (sym->name) + 1);
5267 if (has_name_equals && gfc_current_state () == COMP_INTERFACE
5268 && current_interface.type == INTERFACE_ABSTRACT)
5270 gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C");
5278 /* Return nonzero if we're currently compiling a contained procedure. */
5281 contained_procedure (void)
5283 gfc_state_data *s = gfc_state_stack;
5285 if ((s->state == COMP_SUBROUTINE || s->state == COMP_FUNCTION)
5286 && s->previous != NULL && s->previous->state == COMP_CONTAINS)
5292 /* Set the kind of each enumerator. The kind is selected such that it is
5293 interoperable with the corresponding C enumeration type, making
5294 sure that -fshort-enums is honored. */
5299 enumerator_history *current_history = NULL;
5303 if (max_enum == NULL || enum_history == NULL)
5306 if (!flag_short_enums)
5312 kind = gfc_integer_kinds[i++].kind;
5314 while (kind < gfc_c_int_kind
5315 && gfc_check_integer_range (max_enum->initializer->value.integer,
5318 current_history = enum_history;
5319 while (current_history != NULL)
5321 current_history->sym->ts.kind = kind;
5322 current_history = current_history->next;
5327 /* Match any of the various end-block statements. Returns the type of
5328 END to the caller. The END INTERFACE, END IF, END DO and END
5329 SELECT statements cannot be replaced by a single END statement. */
5332 gfc_match_end (gfc_statement *st)
5334 char name[GFC_MAX_SYMBOL_LEN + 1];
5335 gfc_compile_state state;
5337 const char *block_name;
5342 old_loc = gfc_current_locus;
5343 if (gfc_match ("end") != MATCH_YES)
5346 state = gfc_current_state ();
5347 block_name = gfc_current_block () == NULL
5348 ? NULL : gfc_current_block ()->name;
5350 if (state == COMP_CONTAINS || state == COMP_DERIVED_CONTAINS)
5352 state = gfc_state_stack->previous->state;
5353 block_name = gfc_state_stack->previous->sym == NULL
5354 ? NULL : gfc_state_stack->previous->sym->name;
5361 *st = ST_END_PROGRAM;
5362 target = " program";
5366 case COMP_SUBROUTINE:
5367 *st = ST_END_SUBROUTINE;
5368 target = " subroutine";
5369 eos_ok = !contained_procedure ();
5373 *st = ST_END_FUNCTION;
5374 target = " function";
5375 eos_ok = !contained_procedure ();
5378 case COMP_BLOCK_DATA:
5379 *st = ST_END_BLOCK_DATA;
5380 target = " block data";
5385 *st = ST_END_MODULE;
5390 case COMP_INTERFACE:
5391 *st = ST_END_INTERFACE;
5392 target = " interface";
5397 case COMP_DERIVED_CONTAINS:
5416 *st = ST_END_SELECT;
5422 *st = ST_END_FORALL;
5437 last_initializer = NULL;
5439 gfc_free_enum_history ();
5443 gfc_error ("Unexpected END statement at %C");
5447 if (gfc_match_eos () == MATCH_YES)
5451 /* We would have required END [something]. */
5452 gfc_error ("%s statement expected at %L",
5453 gfc_ascii_statement (*st), &old_loc);
5460 /* Verify that we've got the sort of end-block that we're expecting. */
5461 if (gfc_match (target) != MATCH_YES)
5463 gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st));
5467 /* If we're at the end, make sure a block name wasn't required. */
5468 if (gfc_match_eos () == MATCH_YES)
5471 if (*st != ST_ENDDO && *st != ST_ENDIF && *st != ST_END_SELECT
5472 && *st != ST_END_FORALL && *st != ST_END_WHERE)
5475 if (gfc_current_block () == NULL)
5478 gfc_error ("Expected block name of '%s' in %s statement at %C",
5479 block_name, gfc_ascii_statement (*st));
5484 /* END INTERFACE has a special handler for its several possible endings. */
5485 if (*st == ST_END_INTERFACE)
5486 return gfc_match_end_interface ();
5488 /* We haven't hit the end of statement, so what is left must be an
5490 m = gfc_match_space ();
5492 m = gfc_match_name (name);
5495 gfc_error ("Expected terminating name at %C");
5499 if (block_name == NULL)
5502 if (strcmp (name, block_name) != 0 && strcmp (block_name, "ppr@") != 0)
5504 gfc_error ("Expected label '%s' for %s statement at %C", block_name,
5505 gfc_ascii_statement (*st));
5508 /* Procedure pointer as function result. */
5509 else if (strcmp (block_name, "ppr@") == 0
5510 && strcmp (name, gfc_current_block ()->ns->proc_name->name) != 0)
5512 gfc_error ("Expected label '%s' for %s statement at %C",
5513 gfc_current_block ()->ns->proc_name->name,
5514 gfc_ascii_statement (*st));
5518 if (gfc_match_eos () == MATCH_YES)
5522 gfc_syntax_error (*st);
5525 gfc_current_locus = old_loc;
5531 /***************** Attribute declaration statements ****************/
5533 /* Set the attribute of a single variable. */
5538 char name[GFC_MAX_SYMBOL_LEN + 1];
5546 m = gfc_match_name (name);
5550 if (find_special (name, &sym, false))
5553 var_locus = gfc_current_locus;
5555 /* Deal with possible array specification for certain attributes. */
5556 if (current_attr.dimension
5557 || current_attr.allocatable
5558 || current_attr.pointer
5559 || current_attr.target)
5561 m = gfc_match_array_spec (&as);
5562 if (m == MATCH_ERROR)
5565 if (current_attr.dimension && m == MATCH_NO)
5567 gfc_error ("Missing array specification at %L in DIMENSION "
5568 "statement", &var_locus);
5573 if (current_attr.dimension && sym->value)
5575 gfc_error ("Dimensions specified for %s at %L after its "
5576 "initialisation", sym->name, &var_locus);
5581 if ((current_attr.allocatable || current_attr.pointer)
5582 && (m == MATCH_YES) && (as->type != AS_DEFERRED))
5584 gfc_error ("Array specification must be deferred at %L", &var_locus);
5590 /* Update symbol table. DIMENSION attribute is set
5591 in gfc_set_array_spec(). */
5592 if (current_attr.dimension == 0
5593 && gfc_copy_attr (&sym->attr, ¤t_attr, &var_locus) == FAILURE)
5599 if (gfc_set_array_spec (sym, as, &var_locus) == FAILURE)
5605 if (sym->attr.cray_pointee && sym->as != NULL)
5607 /* Fix the array spec. */
5608 m = gfc_mod_pointee_as (sym->as);
5609 if (m == MATCH_ERROR)
5613 if (gfc_add_attribute (&sym->attr, &var_locus) == FAILURE)
5619 if ((current_attr.external || current_attr.intrinsic)
5620 && sym->attr.flavor != FL_PROCEDURE
5621 && gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL) == FAILURE)
5627 add_hidden_procptr_result (sym);
5632 gfc_free_array_spec (as);
5637 /* Generic attribute declaration subroutine. Used for attributes that
5638 just have a list of names. */
5645 /* Gobble the optional double colon, by simply ignoring the result
5655 if (gfc_match_eos () == MATCH_YES)
5661 if (gfc_match_char (',') != MATCH_YES)
5663 gfc_error ("Unexpected character in variable list at %C");
5673 /* This routine matches Cray Pointer declarations of the form:
5674 pointer ( <pointer>, <pointee> )
5676 pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ...
5677 The pointer, if already declared, should be an integer. Otherwise, we
5678 set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may
5679 be either a scalar, or an array declaration. No space is allocated for
5680 the pointee. For the statement
5681 pointer (ipt, ar(10))
5682 any subsequent uses of ar will be translated (in C-notation) as
5683 ar(i) => ((<type> *) ipt)(i)
5684 After gimplification, pointee variable will disappear in the code. */
5687 cray_pointer_decl (void)
5691 gfc_symbol *cptr; /* Pointer symbol. */
5692 gfc_symbol *cpte; /* Pointee symbol. */
5698 if (gfc_match_char ('(') != MATCH_YES)
5700 gfc_error ("Expected '(' at %C");
5704 /* Match pointer. */
5705 var_locus = gfc_current_locus;
5706 gfc_clear_attr (¤t_attr);
5707 gfc_add_cray_pointer (¤t_attr, &var_locus);
5708 current_ts.type = BT_INTEGER;
5709 current_ts.kind = gfc_index_integer_kind;
5711 m = gfc_match_symbol (&cptr, 0);
5714 gfc_error ("Expected variable name at %C");
5718 if (gfc_add_cray_pointer (&cptr->attr, &var_locus) == FAILURE)
5721 gfc_set_sym_referenced (cptr);
5723 if (cptr->ts.type == BT_UNKNOWN) /* Override the type, if necessary. */
5725 cptr->ts.type = BT_INTEGER;
5726 cptr->ts.kind = gfc_index_integer_kind;
5728 else if (cptr->ts.type != BT_INTEGER)
5730 gfc_error ("Cray pointer at %C must be an integer");
5733 else if (cptr->ts.kind < gfc_index_integer_kind)
5734 gfc_warning ("Cray pointer at %C has %d bytes of precision;"
5735 " memory addresses require %d bytes",
5736 cptr->ts.kind, gfc_index_integer_kind);
5738 if (gfc_match_char (',') != MATCH_YES)
5740 gfc_error ("Expected \",\" at %C");
5744 /* Match Pointee. */
5745 var_locus = gfc_current_locus;
5746 gfc_clear_attr (¤t_attr);
5747 gfc_add_cray_pointee (¤t_attr, &var_locus);
5748 current_ts.type = BT_UNKNOWN;
5749 current_ts.kind = 0;
5751 m = gfc_match_symbol (&cpte, 0);
5754 gfc_error ("Expected variable name at %C");
5758 /* Check for an optional array spec. */
5759 m = gfc_match_array_spec (&as);
5760 if (m == MATCH_ERROR)
5762 gfc_free_array_spec (as);
5765 else if (m == MATCH_NO)
5767 gfc_free_array_spec (as);
5771 if (gfc_add_cray_pointee (&cpte->attr, &var_locus) == FAILURE)
5774 gfc_set_sym_referenced (cpte);
5776 if (cpte->as == NULL)
5778 if (gfc_set_array_spec (cpte, as, &var_locus) == FAILURE)
5779 gfc_internal_error ("Couldn't set Cray pointee array spec.");
5781 else if (as != NULL)
5783 gfc_error ("Duplicate array spec for Cray pointee at %C");
5784 gfc_free_array_spec (as);
5790 if (cpte->as != NULL)
5792 /* Fix array spec. */
5793 m = gfc_mod_pointee_as (cpte->as);
5794 if (m == MATCH_ERROR)
5798 /* Point the Pointee at the Pointer. */
5799 cpte->cp_pointer = cptr;
5801 if (gfc_match_char (')') != MATCH_YES)
5803 gfc_error ("Expected \")\" at %C");
5806 m = gfc_match_char (',');
5808 done = true; /* Stop searching for more declarations. */
5812 if (m == MATCH_ERROR /* Failed when trying to find ',' above. */
5813 || gfc_match_eos () != MATCH_YES)
5815 gfc_error ("Expected \",\" or end of statement at %C");
5823 gfc_match_external (void)
5826 gfc_clear_attr (¤t_attr);
5827 current_attr.external = 1;
5829 return attr_decl ();
5834 gfc_match_intent (void)
5838 intent = match_intent_spec ();
5839 if (intent == INTENT_UNKNOWN)
5842 gfc_clear_attr (¤t_attr);
5843 current_attr.intent = intent;
5845 return attr_decl ();
5850 gfc_match_intrinsic (void)
5853 gfc_clear_attr (¤t_attr);
5854 current_attr.intrinsic = 1;
5856 return attr_decl ();
5861 gfc_match_optional (void)
5864 gfc_clear_attr (¤t_attr);
5865 current_attr.optional = 1;
5867 return attr_decl ();
5872 gfc_match_pointer (void)
5874 gfc_gobble_whitespace ();
5875 if (gfc_peek_ascii_char () == '(')
5877 if (!gfc_option.flag_cray_pointer)
5879 gfc_error ("Cray pointer declaration at %C requires -fcray-pointer "
5883 return cray_pointer_decl ();
5887 gfc_clear_attr (¤t_attr);
5888 current_attr.pointer = 1;
5890 return attr_decl ();
5896 gfc_match_allocatable (void)
5898 gfc_clear_attr (¤t_attr);
5899 current_attr.allocatable = 1;
5901 return attr_decl ();
5906 gfc_match_dimension (void)
5908 gfc_clear_attr (¤t_attr);
5909 current_attr.dimension = 1;
5911 return attr_decl ();
5916 gfc_match_target (void)
5918 gfc_clear_attr (¤t_attr);
5919 current_attr.target = 1;
5921 return attr_decl ();
5925 /* Match the list of entities being specified in a PUBLIC or PRIVATE
5929 access_attr_decl (gfc_statement st)
5931 char name[GFC_MAX_SYMBOL_LEN + 1];
5932 interface_type type;
5935 gfc_intrinsic_op op;
5938 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
5943 m = gfc_match_generic_spec (&type, name, &op);
5946 if (m == MATCH_ERROR)
5951 case INTERFACE_NAMELESS:
5952 case INTERFACE_ABSTRACT:
5955 case INTERFACE_GENERIC:
5956 if (gfc_get_symbol (name, NULL, &sym))
5959 if (gfc_add_access (&sym->attr, (st == ST_PUBLIC)
5960 ? ACCESS_PUBLIC : ACCESS_PRIVATE,
5961 sym->name, NULL) == FAILURE)
5966 case INTERFACE_INTRINSIC_OP:
5967 if (gfc_current_ns->operator_access[op] == ACCESS_UNKNOWN)
5969 gfc_current_ns->operator_access[op] =
5970 (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE;
5974 gfc_error ("Access specification of the %s operator at %C has "
5975 "already been specified", gfc_op2string (op));
5981 case INTERFACE_USER_OP:
5982 uop = gfc_get_uop (name);
5984 if (uop->access == ACCESS_UNKNOWN)
5986 uop->access = (st == ST_PUBLIC)
5987 ? ACCESS_PUBLIC : ACCESS_PRIVATE;
5991 gfc_error ("Access specification of the .%s. operator at %C "
5992 "has already been specified", sym->name);
5999 if (gfc_match_char (',') == MATCH_NO)
6003 if (gfc_match_eos () != MATCH_YES)
6008 gfc_syntax_error (st);
6016 gfc_match_protected (void)
6021 if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE)
6023 gfc_error ("PROTECTED at %C only allowed in specification "
6024 "part of a module");
6029 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED statement at %C")
6033 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6038 if (gfc_match_eos () == MATCH_YES)
6043 m = gfc_match_symbol (&sym, 0);
6047 if (gfc_add_protected (&sym->attr, sym->name, &gfc_current_locus)
6060 if (gfc_match_eos () == MATCH_YES)
6062 if (gfc_match_char (',') != MATCH_YES)
6069 gfc_error ("Syntax error in PROTECTED statement at %C");
6074 /* The PRIVATE statement is a bit weird in that it can be an attribute
6075 declaration, but also works as a standalone statement inside of a
6076 type declaration or a module. */
6079 gfc_match_private (gfc_statement *st)
6082 if (gfc_match ("private") != MATCH_YES)
6085 if (gfc_current_state () != COMP_MODULE
6086 && !(gfc_current_state () == COMP_DERIVED
6087 && gfc_state_stack->previous
6088 && gfc_state_stack->previous->state == COMP_MODULE)
6089 && !(gfc_current_state () == COMP_DERIVED_CONTAINS
6090 && gfc_state_stack->previous && gfc_state_stack->previous->previous
6091 && gfc_state_stack->previous->previous->state == COMP_MODULE))
6093 gfc_error ("PRIVATE statement at %C is only allowed in the "
6094 "specification part of a module");
6098 if (gfc_current_state () == COMP_DERIVED)
6100 if (gfc_match_eos () == MATCH_YES)
6106 gfc_syntax_error (ST_PRIVATE);
6110 if (gfc_match_eos () == MATCH_YES)
6117 return access_attr_decl (ST_PRIVATE);
6122 gfc_match_public (gfc_statement *st)
6125 if (gfc_match ("public") != MATCH_YES)
6128 if (gfc_current_state () != COMP_MODULE)
6130 gfc_error ("PUBLIC statement at %C is only allowed in the "
6131 "specification part of a module");
6135 if (gfc_match_eos () == MATCH_YES)
6142 return access_attr_decl (ST_PUBLIC);
6146 /* Workhorse for gfc_match_parameter. */
6155 m = gfc_match_symbol (&sym, 0);
6157 gfc_error ("Expected variable name at %C in PARAMETER statement");
6162 if (gfc_match_char ('=') == MATCH_NO)
6164 gfc_error ("Expected = sign in PARAMETER statement at %C");
6168 m = gfc_match_init_expr (&init);
6170 gfc_error ("Expected expression at %C in PARAMETER statement");
6174 if (sym->ts.type == BT_UNKNOWN
6175 && gfc_set_default_type (sym, 1, NULL) == FAILURE)
6181 if (gfc_check_assign_symbol (sym, init) == FAILURE
6182 || gfc_add_flavor (&sym->attr, FL_PARAMETER, sym->name, NULL) == FAILURE)
6190 gfc_error ("Initializing already initialized variable at %C");
6195 if (sym->ts.type == BT_CHARACTER
6196 && sym->ts.cl != NULL
6197 && sym->ts.cl->length != NULL
6198 && sym->ts.cl->length->expr_type == EXPR_CONSTANT
6199 && init->expr_type == EXPR_CONSTANT
6200 && init->ts.type == BT_CHARACTER)
6201 gfc_set_constant_character_len (
6202 mpz_get_si (sym->ts.cl->length->value.integer), init, -1);
6203 else if (sym->ts.type == BT_CHARACTER && sym->ts.cl != NULL
6204 && sym->ts.cl->length == NULL)
6207 if (init->expr_type == EXPR_CONSTANT)
6209 clen = init->value.character.length;
6210 sym->ts.cl->length = gfc_int_expr (clen);
6212 else if (init->expr_type == EXPR_ARRAY)
6214 gfc_expr *p = init->value.constructor->expr;
6215 clen = p->value.character.length;
6216 sym->ts.cl->length = gfc_int_expr (clen);
6218 else if (init->ts.cl && init->ts.cl->length)
6219 sym->ts.cl->length = gfc_copy_expr (sym->value->ts.cl->length);
6226 gfc_free_expr (init);
6231 /* Match a parameter statement, with the weird syntax that these have. */
6234 gfc_match_parameter (void)
6238 if (gfc_match_char ('(') == MATCH_NO)
6247 if (gfc_match (" )%t") == MATCH_YES)
6250 if (gfc_match_char (',') != MATCH_YES)
6252 gfc_error ("Unexpected characters in PARAMETER statement at %C");
6262 /* Save statements have a special syntax. */
6265 gfc_match_save (void)
6267 char n[GFC_MAX_SYMBOL_LEN+1];
6272 if (gfc_match_eos () == MATCH_YES)
6274 if (gfc_current_ns->seen_save)
6276 if (gfc_notify_std (GFC_STD_LEGACY, "Blanket SAVE statement at %C "
6277 "follows previous SAVE statement")
6282 gfc_current_ns->save_all = gfc_current_ns->seen_save = 1;
6286 if (gfc_current_ns->save_all)
6288 if (gfc_notify_std (GFC_STD_LEGACY, "SAVE statement at %C follows "
6289 "blanket SAVE statement")
6298 m = gfc_match_symbol (&sym, 0);
6302 if (gfc_add_save (&sym->attr, sym->name, &gfc_current_locus)
6314 m = gfc_match (" / %n /", &n);
6315 if (m == MATCH_ERROR)
6320 c = gfc_get_common (n, 0);
6323 gfc_current_ns->seen_save = 1;
6326 if (gfc_match_eos () == MATCH_YES)
6328 if (gfc_match_char (',') != MATCH_YES)
6335 gfc_error ("Syntax error in SAVE statement at %C");
6341 gfc_match_value (void)
6346 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE statement at %C")
6350 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6355 if (gfc_match_eos () == MATCH_YES)
6360 m = gfc_match_symbol (&sym, 0);
6364 if (gfc_add_value (&sym->attr, sym->name, &gfc_current_locus)
6377 if (gfc_match_eos () == MATCH_YES)
6379 if (gfc_match_char (',') != MATCH_YES)
6386 gfc_error ("Syntax error in VALUE statement at %C");
6392 gfc_match_volatile (void)
6397 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VOLATILE statement at %C")
6401 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6406 if (gfc_match_eos () == MATCH_YES)
6411 /* VOLATILE is special because it can be added to host-associated
6413 m = gfc_match_symbol (&sym, 1);
6417 if (gfc_add_volatile (&sym->attr, sym->name, &gfc_current_locus)
6430 if (gfc_match_eos () == MATCH_YES)
6432 if (gfc_match_char (',') != MATCH_YES)
6439 gfc_error ("Syntax error in VOLATILE statement at %C");
6444 /* Match a module procedure statement. Note that we have to modify
6445 symbols in the parent's namespace because the current one was there
6446 to receive symbols that are in an interface's formal argument list. */
6449 gfc_match_modproc (void)
6451 char name[GFC_MAX_SYMBOL_LEN + 1];
6454 gfc_namespace *module_ns;
6455 gfc_interface *old_interface_head, *interface;
6457 if (gfc_state_stack->state != COMP_INTERFACE
6458 || gfc_state_stack->previous == NULL
6459 || current_interface.type == INTERFACE_NAMELESS
6460 || current_interface.type == INTERFACE_ABSTRACT)
6462 gfc_error ("MODULE PROCEDURE at %C must be in a generic module "
6467 module_ns = gfc_current_ns->parent;
6468 for (; module_ns; module_ns = module_ns->parent)
6469 if (module_ns->proc_name->attr.flavor == FL_MODULE)
6472 if (module_ns == NULL)
6475 /* Store the current state of the interface. We will need it if we
6476 end up with a syntax error and need to recover. */
6477 old_interface_head = gfc_current_interface_head ();
6483 m = gfc_match_name (name);
6489 /* Check for syntax error before starting to add symbols to the
6490 current namespace. */
6491 if (gfc_match_eos () == MATCH_YES)
6493 if (!last && gfc_match_char (',') != MATCH_YES)
6496 /* Now we're sure the syntax is valid, we process this item
6498 if (gfc_get_symbol (name, module_ns, &sym))
6501 if (sym->attr.proc != PROC_MODULE
6502 && gfc_add_procedure (&sym->attr, PROC_MODULE,
6503 sym->name, NULL) == FAILURE)
6506 if (gfc_add_interface (sym) == FAILURE)
6509 sym->attr.mod_proc = 1;
6518 /* Restore the previous state of the interface. */
6519 interface = gfc_current_interface_head ();
6520 gfc_set_current_interface_head (old_interface_head);
6522 /* Free the new interfaces. */
6523 while (interface != old_interface_head)
6525 gfc_interface *i = interface->next;
6526 gfc_free (interface);
6530 /* And issue a syntax error. */
6531 gfc_syntax_error (ST_MODULE_PROC);
6536 /* Check a derived type that is being extended. */
6538 check_extended_derived_type (char *name)
6540 gfc_symbol *extended;
6542 if (gfc_find_symbol (name, gfc_current_ns, 1, &extended))
6544 gfc_error ("Ambiguous symbol in TYPE definition at %C");
6550 gfc_error ("No such symbol in TYPE definition at %C");
6554 if (extended->attr.flavor != FL_DERIVED)
6556 gfc_error ("'%s' in EXTENDS expression at %C is not a "
6557 "derived type", name);
6561 if (extended->attr.is_bind_c)
6563 gfc_error ("'%s' cannot be extended at %C because it "
6564 "is BIND(C)", extended->name);
6568 if (extended->attr.sequence)
6570 gfc_error ("'%s' cannot be extended at %C because it "
6571 "is a SEQUENCE type", extended->name);
6579 /* Match the optional attribute specifiers for a type declaration.
6580 Return MATCH_ERROR if an error is encountered in one of the handled
6581 attributes (public, private, bind(c)), MATCH_NO if what's found is
6582 not a handled attribute, and MATCH_YES otherwise. TODO: More error
6583 checking on attribute conflicts needs to be done. */
6586 gfc_get_type_attr_spec (symbol_attribute *attr, char *name)
6588 /* See if the derived type is marked as private. */
6589 if (gfc_match (" , private") == MATCH_YES)
6591 if (gfc_current_state () != COMP_MODULE)
6593 gfc_error ("Derived type at %C can only be PRIVATE in the "
6594 "specification part of a module");
6598 if (gfc_add_access (attr, ACCESS_PRIVATE, NULL, NULL) == FAILURE)
6601 else if (gfc_match (" , public") == MATCH_YES)
6603 if (gfc_current_state () != COMP_MODULE)
6605 gfc_error ("Derived type at %C can only be PUBLIC in the "
6606 "specification part of a module");
6610 if (gfc_add_access (attr, ACCESS_PUBLIC, NULL, NULL) == FAILURE)
6613 else if (gfc_match (" , bind ( c )") == MATCH_YES)
6615 /* If the type is defined to be bind(c) it then needs to make
6616 sure that all fields are interoperable. This will
6617 need to be a semantic check on the finished derived type.
6618 See 15.2.3 (lines 9-12) of F2003 draft. */
6619 if (gfc_add_is_bind_c (attr, NULL, &gfc_current_locus, 0) != SUCCESS)
6622 /* TODO: attr conflicts need to be checked, probably in symbol.c. */
6624 else if (gfc_match (" , abstract") == MATCH_YES)
6626 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ABSTRACT type at %C")
6630 if (gfc_add_abstract (attr, &gfc_current_locus) == FAILURE)
6633 else if (name && gfc_match(" , extends ( %n )", name) == MATCH_YES)
6635 if (gfc_add_extension (attr, &gfc_current_locus) == FAILURE)
6641 /* If we get here, something matched. */
6646 /* Match the beginning of a derived type declaration. If a type name
6647 was the result of a function, then it is possible to have a symbol
6648 already to be known as a derived type yet have no components. */
6651 gfc_match_derived_decl (void)
6653 char name[GFC_MAX_SYMBOL_LEN + 1];
6654 char parent[GFC_MAX_SYMBOL_LEN + 1];
6655 symbol_attribute attr;
6657 gfc_symbol *extended;
6659 match is_type_attr_spec = MATCH_NO;
6660 bool seen_attr = false;
6662 if (gfc_current_state () == COMP_DERIVED)
6667 gfc_clear_attr (&attr);
6672 is_type_attr_spec = gfc_get_type_attr_spec (&attr, parent);
6673 if (is_type_attr_spec == MATCH_ERROR)
6675 if (is_type_attr_spec == MATCH_YES)
6677 } while (is_type_attr_spec == MATCH_YES);
6679 /* Deal with derived type extensions. The extension attribute has
6680 been added to 'attr' but now the parent type must be found and
6683 extended = check_extended_derived_type (parent);
6685 if (parent[0] && !extended)
6688 if (gfc_match (" ::") != MATCH_YES && seen_attr)
6690 gfc_error ("Expected :: in TYPE definition at %C");
6694 m = gfc_match (" %n%t", name);
6698 /* Make sure the name is not the name of an intrinsic type. */
6699 if (gfc_is_intrinsic_typename (name))
6701 gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic "
6706 if (gfc_get_symbol (name, NULL, &sym))
6709 if (sym->ts.type != BT_UNKNOWN)
6711 gfc_error ("Derived type name '%s' at %C already has a basic type "
6712 "of %s", sym->name, gfc_typename (&sym->ts));
6716 /* The symbol may already have the derived attribute without the
6717 components. The ways this can happen is via a function
6718 definition, an INTRINSIC statement or a subtype in another
6719 derived type that is a pointer. The first part of the AND clause
6720 is true if the symbol is not the return value of a function. */
6721 if (sym->attr.flavor != FL_DERIVED
6722 && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE)
6725 if (sym->components != NULL || sym->attr.zero_comp)
6727 gfc_error ("Derived type definition of '%s' at %C has already been "
6728 "defined", sym->name);
6732 if (attr.access != ACCESS_UNKNOWN
6733 && gfc_add_access (&sym->attr, attr.access, sym->name, NULL) == FAILURE)
6736 /* See if the derived type was labeled as bind(c). */
6737 if (attr.is_bind_c != 0)
6738 sym->attr.is_bind_c = attr.is_bind_c;
6740 /* Construct the f2k_derived namespace if it is not yet there. */
6741 if (!sym->f2k_derived)
6742 sym->f2k_derived = gfc_get_namespace (NULL, 0);
6744 if (extended && !sym->components)
6749 /* Add the extended derived type as the first component. */
6750 gfc_add_component (sym, parent, &p);
6751 sym->attr.extension = attr.extension;
6753 gfc_set_sym_referenced (extended);
6755 p->ts.type = BT_DERIVED;
6756 p->ts.derived = extended;
6757 p->initializer = gfc_default_initializer (&p->ts);
6759 /* Provide the links between the extended type and its extension. */
6760 if (!extended->f2k_derived)
6761 extended->f2k_derived = gfc_get_namespace (NULL, 0);
6762 st = gfc_new_symtree (&extended->f2k_derived->sym_root, sym->name);
6766 /* Take over the ABSTRACT attribute. */
6767 sym->attr.abstract = attr.abstract;
6769 gfc_new_block = sym;
6775 /* Cray Pointees can be declared as:
6776 pointer (ipt, a (n,m,...,*))
6777 By default, this is treated as an AS_ASSUMED_SIZE array. We'll
6778 cheat and set a constant bound of 1 for the last dimension, if this
6779 is the case. Since there is no bounds-checking for Cray Pointees,
6780 this will be okay. */
6783 gfc_mod_pointee_as (gfc_array_spec *as)
6785 as->cray_pointee = true; /* This will be useful to know later. */
6786 if (as->type == AS_ASSUMED_SIZE)
6788 as->type = AS_EXPLICIT;
6789 as->upper[as->rank - 1] = gfc_int_expr (1);
6790 as->cp_was_assumed = true;
6792 else if (as->type == AS_ASSUMED_SHAPE)
6794 gfc_error ("Cray Pointee at %C cannot be assumed shape array");
6801 /* Match the enum definition statement, here we are trying to match
6802 the first line of enum definition statement.
6803 Returns MATCH_YES if match is found. */
6806 gfc_match_enum (void)
6810 m = gfc_match_eos ();
6814 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENUM and ENUMERATOR at %C")
6822 /* Returns an initializer whose value is one higher than the value of the
6823 LAST_INITIALIZER argument. If the argument is NULL, the
6824 initializers value will be set to zero. The initializer's kind
6825 will be set to gfc_c_int_kind.
6827 If -fshort-enums is given, the appropriate kind will be selected
6828 later after all enumerators have been parsed. A warning is issued
6829 here if an initializer exceeds gfc_c_int_kind. */
6832 enum_initializer (gfc_expr *last_initializer, locus where)
6836 result = gfc_get_expr ();
6837 result->expr_type = EXPR_CONSTANT;
6838 result->ts.type = BT_INTEGER;
6839 result->ts.kind = gfc_c_int_kind;
6840 result->where = where;
6842 mpz_init (result->value.integer);
6844 if (last_initializer != NULL)
6846 mpz_add_ui (result->value.integer, last_initializer->value.integer, 1);
6847 result->where = last_initializer->where;
6849 if (gfc_check_integer_range (result->value.integer,
6850 gfc_c_int_kind) != ARITH_OK)
6852 gfc_error ("Enumerator exceeds the C integer type at %C");
6858 /* Control comes here, if it's the very first enumerator and no
6859 initializer has been given. It will be initialized to zero. */
6860 mpz_set_si (result->value.integer, 0);
6867 /* Match a variable name with an optional initializer. When this
6868 subroutine is called, a variable is expected to be parsed next.
6869 Depending on what is happening at the moment, updates either the
6870 symbol table or the current interface. */
6873 enumerator_decl (void)
6875 char name[GFC_MAX_SYMBOL_LEN + 1];
6876 gfc_expr *initializer;
6877 gfc_array_spec *as = NULL;
6885 old_locus = gfc_current_locus;
6887 /* When we get here, we've just matched a list of attributes and
6888 maybe a type and a double colon. The next thing we expect to see
6889 is the name of the symbol. */
6890 m = gfc_match_name (name);
6894 var_locus = gfc_current_locus;
6896 /* OK, we've successfully matched the declaration. Now put the
6897 symbol in the current namespace. If we fail to create the symbol,
6899 if (build_sym (name, NULL, &as, &var_locus) == FAILURE)
6905 /* The double colon must be present in order to have initializers.
6906 Otherwise the statement is ambiguous with an assignment statement. */
6909 if (gfc_match_char ('=') == MATCH_YES)
6911 m = gfc_match_init_expr (&initializer);
6914 gfc_error ("Expected an initialization expression at %C");
6923 /* If we do not have an initializer, the initialization value of the
6924 previous enumerator (stored in last_initializer) is incremented
6925 by 1 and is used to initialize the current enumerator. */
6926 if (initializer == NULL)
6927 initializer = enum_initializer (last_initializer, old_locus);
6929 if (initializer == NULL || initializer->ts.type != BT_INTEGER)
6931 gfc_error("ENUMERATOR %L not initialized with integer expression",
6934 gfc_free_enum_history ();
6938 /* Store this current initializer, for the next enumerator variable
6939 to be parsed. add_init_expr_to_sym() zeros initializer, so we
6940 use last_initializer below. */
6941 last_initializer = initializer;
6942 t = add_init_expr_to_sym (name, &initializer, &var_locus);
6944 /* Maintain enumerator history. */
6945 gfc_find_symbol (name, NULL, 0, &sym);
6946 create_enum_history (sym, last_initializer);
6948 return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR;
6951 /* Free stuff up and return. */
6952 gfc_free_expr (initializer);
6958 /* Match the enumerator definition statement. */
6961 gfc_match_enumerator_def (void)
6966 gfc_clear_ts (¤t_ts);
6968 m = gfc_match (" enumerator");
6972 m = gfc_match (" :: ");
6973 if (m == MATCH_ERROR)
6976 colon_seen = (m == MATCH_YES);
6978 if (gfc_current_state () != COMP_ENUM)
6980 gfc_error ("ENUM definition statement expected before %C");
6981 gfc_free_enum_history ();
6985 (¤t_ts)->type = BT_INTEGER;
6986 (¤t_ts)->kind = gfc_c_int_kind;
6988 gfc_clear_attr (¤t_attr);
6989 t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, NULL);
6998 m = enumerator_decl ();
6999 if (m == MATCH_ERROR)
7004 if (gfc_match_eos () == MATCH_YES)
7006 if (gfc_match_char (',') != MATCH_YES)
7010 if (gfc_current_state () == COMP_ENUM)
7012 gfc_free_enum_history ();
7013 gfc_error ("Syntax error in ENUMERATOR definition at %C");
7018 gfc_free_array_spec (current_as);
7025 /* Match binding attributes. */
7028 match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc)
7030 bool found_passing = false;
7031 bool seen_ptr = false;
7032 match m = MATCH_YES;
7034 /* Intialize to defaults. Do so even before the MATCH_NO check so that in
7035 this case the defaults are in there. */
7036 ba->access = ACCESS_UNKNOWN;
7037 ba->pass_arg = NULL;
7038 ba->pass_arg_num = 0;
7040 ba->non_overridable = 0;
7044 /* If we find a comma, we believe there are binding attributes. */
7045 m = gfc_match_char (',');
7051 /* Access specifier. */
7053 m = gfc_match (" public");
7054 if (m == MATCH_ERROR)
7058 if (ba->access != ACCESS_UNKNOWN)
7060 gfc_error ("Duplicate access-specifier at %C");
7064 ba->access = ACCESS_PUBLIC;
7068 m = gfc_match (" private");
7069 if (m == MATCH_ERROR)
7073 if (ba->access != ACCESS_UNKNOWN)
7075 gfc_error ("Duplicate access-specifier at %C");
7079 ba->access = ACCESS_PRIVATE;
7083 /* If inside GENERIC, the following is not allowed. */
7088 m = gfc_match (" nopass");
7089 if (m == MATCH_ERROR)
7095 gfc_error ("Binding attributes already specify passing,"
7096 " illegal NOPASS at %C");
7100 found_passing = true;
7105 /* PASS possibly including argument. */
7106 m = gfc_match (" pass");
7107 if (m == MATCH_ERROR)
7111 char arg[GFC_MAX_SYMBOL_LEN + 1];
7115 gfc_error ("Binding attributes already specify passing,"
7116 " illegal PASS at %C");
7120 m = gfc_match (" ( %n )", arg);
7121 if (m == MATCH_ERROR)
7124 ba->pass_arg = gfc_get_string (arg);
7125 gcc_assert ((m == MATCH_YES) == (ba->pass_arg != NULL));
7127 found_passing = true;
7135 m = gfc_match (" pointer");
7136 if (m == MATCH_ERROR)
7142 gfc_error ("Duplicate POINTER attribute at %C");
7152 /* NON_OVERRIDABLE flag. */
7153 m = gfc_match (" non_overridable");
7154 if (m == MATCH_ERROR)
7158 if (ba->non_overridable)
7160 gfc_error ("Duplicate NON_OVERRIDABLE at %C");
7164 ba->non_overridable = 1;
7168 /* DEFERRED flag. */
7169 m = gfc_match (" deferred");
7170 if (m == MATCH_ERROR)
7176 gfc_error ("Duplicate DEFERRED at %C");
7187 /* Nothing matching found. */
7189 gfc_error ("Expected access-specifier at %C");
7191 gfc_error ("Expected binding attribute at %C");
7194 while (gfc_match_char (',') == MATCH_YES);
7196 /* NON_OVERRIDABLE and DEFERRED exclude themselves. */
7197 if (ba->non_overridable && ba->deferred)
7199 gfc_error ("NON_OVERRIDABLE and DEFERRED can't both appear at %C");
7206 if (ba->access == ACCESS_UNKNOWN)
7207 ba->access = gfc_typebound_default_access;
7209 if (ppc && !seen_ptr)
7211 gfc_error ("POINTER attribute is required for procedure pointer component"
7223 /* Match a PROCEDURE specific binding inside a derived type. */
7226 match_procedure_in_type (void)
7228 char name[GFC_MAX_SYMBOL_LEN + 1];
7229 char target_buf[GFC_MAX_SYMBOL_LEN + 1];
7230 char* target = NULL;
7231 gfc_typebound_proc* tb;
7239 /* Check current state. */
7240 gcc_assert (gfc_state_stack->state == COMP_DERIVED_CONTAINS);
7241 block = gfc_state_stack->previous->sym;
7244 /* Try to match PROCEDURE(interface). */
7245 if (gfc_match (" (") == MATCH_YES)
7247 m = gfc_match_name (target_buf);
7248 if (m == MATCH_ERROR)
7252 gfc_error ("Interface-name expected after '(' at %C");
7256 if (gfc_match (" )") != MATCH_YES)
7258 gfc_error ("')' expected at %C");
7262 target = target_buf;
7265 /* Construct the data structure. */
7266 tb = gfc_get_typebound_proc ();
7267 tb->where = gfc_current_locus;
7270 /* Match binding attributes. */
7271 m = match_binding_attributes (tb, false, false);
7272 if (m == MATCH_ERROR)
7274 seen_attrs = (m == MATCH_YES);
7276 /* Check that attribute DEFERRED is given iff an interface is specified, which
7277 means target != NULL. */
7278 if (tb->deferred && !target)
7280 gfc_error ("Interface must be specified for DEFERRED binding at %C");
7283 if (target && !tb->deferred)
7285 gfc_error ("PROCEDURE(interface) at %C should be declared DEFERRED");
7289 /* Match the colons. */
7290 m = gfc_match (" ::");
7291 if (m == MATCH_ERROR)
7293 seen_colons = (m == MATCH_YES);
7294 if (seen_attrs && !seen_colons)
7296 gfc_error ("Expected '::' after binding-attributes at %C");
7300 /* Match the binding name. */
7301 m = gfc_match_name (name);
7302 if (m == MATCH_ERROR)
7306 gfc_error ("Expected binding name at %C");
7310 /* Try to match the '=> target', if it's there. */
7311 m = gfc_match (" =>");
7312 if (m == MATCH_ERROR)
7318 gfc_error ("'=> target' is invalid for DEFERRED binding at %C");
7324 gfc_error ("'::' needed in PROCEDURE binding with explicit target"
7329 m = gfc_match_name (target_buf);
7330 if (m == MATCH_ERROR)
7334 gfc_error ("Expected binding target after '=>' at %C");
7337 target = target_buf;
7340 /* Now we should have the end. */
7341 m = gfc_match_eos ();
7342 if (m == MATCH_ERROR)
7346 gfc_error ("Junk after PROCEDURE declaration at %C");
7350 /* If no target was found, it has the same name as the binding. */
7354 /* Get the namespace to insert the symbols into. */
7355 ns = block->f2k_derived;
7358 /* If the binding is DEFERRED, check that the containing type is ABSTRACT. */
7359 if (tb->deferred && !block->attr.abstract)
7361 gfc_error ("Type '%s' containing DEFERRED binding at %C is not ABSTRACT",
7366 /* See if we already have a binding with this name in the symtree which would
7367 be an error. If a GENERIC already targetted this binding, it may be
7368 already there but then typebound is still NULL. */
7369 stree = gfc_find_symtree (ns->tb_sym_root, name);
7370 if (stree && stree->n.tb)
7372 gfc_error ("There's already a procedure with binding name '%s' for the"
7373 " derived type '%s' at %C", name, block->name);
7377 /* Insert it and set attributes. */
7381 stree = gfc_new_symtree (&ns->tb_sym_root, name);
7386 if (gfc_get_sym_tree (target, gfc_current_ns, &tb->u.specific, false))
7388 gfc_set_sym_referenced (tb->u.specific->n.sym);
7394 /* Match a GENERIC procedure binding inside a derived type. */
7397 gfc_match_generic (void)
7399 char name[GFC_MAX_SYMBOL_LEN + 1];
7401 gfc_typebound_proc tbattr; /* Used for match_binding_attributes. */
7402 gfc_typebound_proc* tb;
7407 /* Check current state. */
7408 if (gfc_current_state () == COMP_DERIVED)
7410 gfc_error ("GENERIC at %C must be inside a derived-type CONTAINS");
7413 if (gfc_current_state () != COMP_DERIVED_CONTAINS)
7415 block = gfc_state_stack->previous->sym;
7416 ns = block->f2k_derived;
7417 gcc_assert (block && ns);
7419 /* See if we get an access-specifier. */
7420 m = match_binding_attributes (&tbattr, true, false);
7421 if (m == MATCH_ERROR)
7424 /* Now the colons, those are required. */
7425 if (gfc_match (" ::") != MATCH_YES)
7427 gfc_error ("Expected '::' at %C");
7431 /* The binding name and =>. */
7432 m = gfc_match (" %n =>", name);
7433 if (m == MATCH_ERROR)
7437 gfc_error ("Expected generic name at %C");
7441 /* If there's already something with this name, check that it is another
7442 GENERIC and then extend that rather than build a new node. */
7443 st = gfc_find_symtree (ns->tb_sym_root, name);
7446 gcc_assert (st->n.tb);
7449 if (!tb->is_generic)
7451 gfc_error ("There's already a non-generic procedure with binding name"
7452 " '%s' for the derived type '%s' at %C",
7457 if (tb->access != tbattr.access)
7459 gfc_error ("Binding at %C must have the same access as already"
7460 " defined binding '%s'", name);
7466 st = gfc_new_symtree (&ns->tb_sym_root, name);
7469 st->n.tb = tb = gfc_get_typebound_proc ();
7470 tb->where = gfc_current_locus;
7471 tb->access = tbattr.access;
7473 tb->u.generic = NULL;
7476 /* Now, match all following names as specific targets. */
7479 gfc_symtree* target_st;
7480 gfc_tbp_generic* target;
7482 m = gfc_match_name (name);
7483 if (m == MATCH_ERROR)
7487 gfc_error ("Expected specific binding name at %C");
7491 target_st = gfc_get_tbp_symtree (&ns->tb_sym_root, name);
7493 /* See if this is a duplicate specification. */
7494 for (target = tb->u.generic; target; target = target->next)
7495 if (target_st == target->specific_st)
7497 gfc_error ("'%s' already defined as specific binding for the"
7498 " generic '%s' at %C", name, st->name);
7502 target = gfc_get_tbp_generic ();
7503 target->specific_st = target_st;
7504 target->specific = NULL;
7505 target->next = tb->u.generic;
7506 tb->u.generic = target;
7508 while (gfc_match (" ,") == MATCH_YES);
7510 /* Here should be the end. */
7511 if (gfc_match_eos () != MATCH_YES)
7513 gfc_error ("Junk after GENERIC binding at %C");
7524 /* Match a FINAL declaration inside a derived type. */
7527 gfc_match_final_decl (void)
7529 char name[GFC_MAX_SYMBOL_LEN + 1];
7532 gfc_namespace* module_ns;
7536 if (gfc_state_stack->state != COMP_DERIVED_CONTAINS)
7538 gfc_error ("FINAL declaration at %C must be inside a derived type "
7539 "CONTAINS section");
7543 block = gfc_state_stack->previous->sym;
7546 if (!gfc_state_stack->previous || !gfc_state_stack->previous->previous
7547 || gfc_state_stack->previous->previous->state != COMP_MODULE)
7549 gfc_error ("Derived type declaration with FINAL at %C must be in the"
7550 " specification part of a MODULE");
7554 module_ns = gfc_current_ns;
7555 gcc_assert (module_ns);
7556 gcc_assert (module_ns->proc_name->attr.flavor == FL_MODULE);
7558 /* Match optional ::, don't care about MATCH_YES or MATCH_NO. */
7559 if (gfc_match (" ::") == MATCH_ERROR)
7562 /* Match the sequence of procedure names. */
7569 if (first && gfc_match_eos () == MATCH_YES)
7571 gfc_error ("Empty FINAL at %C");
7575 m = gfc_match_name (name);
7578 gfc_error ("Expected module procedure name at %C");
7581 else if (m != MATCH_YES)
7584 if (gfc_match_eos () == MATCH_YES)
7586 if (!last && gfc_match_char (',') != MATCH_YES)
7588 gfc_error ("Expected ',' at %C");
7592 if (gfc_get_symbol (name, module_ns, &sym))
7594 gfc_error ("Unknown procedure name \"%s\" at %C", name);
7598 /* Mark the symbol as module procedure. */
7599 if (sym->attr.proc != PROC_MODULE
7600 && gfc_add_procedure (&sym->attr, PROC_MODULE,
7601 sym->name, NULL) == FAILURE)
7604 /* Check if we already have this symbol in the list, this is an error. */
7605 for (f = block->f2k_derived->finalizers; f; f = f->next)
7606 if (f->proc_sym == sym)
7608 gfc_error ("'%s' at %C is already defined as FINAL procedure!",
7613 /* Add this symbol to the list of finalizers. */
7614 gcc_assert (block->f2k_derived);
7616 f = XCNEW (gfc_finalizer);
7618 f->proc_tree = NULL;
7619 f->where = gfc_current_locus;
7620 f->next = block->f2k_derived->finalizers;
7621 block->f2k_derived->finalizers = f;
7631 const ext_attr_t ext_attr_list[] = {
7632 { "dllimport", EXT_ATTR_DLLIMPORT, "dllimport" },
7633 { "dllexport", EXT_ATTR_DLLEXPORT, "dllexport" },
7634 { "cdecl", EXT_ATTR_CDECL, "cdecl" },
7635 { "stdcall", EXT_ATTR_STDCALL, "stdcall" },
7636 { "fastcall", EXT_ATTR_FASTCALL, "fastcall" },
7637 { NULL, EXT_ATTR_LAST, NULL }
7640 /* Match a !GCC$ ATTRIBUTES statement of the form:
7641 !GCC$ ATTRIBUTES attribute-list :: var-name [, var-name] ...
7642 When we come here, we have already matched the !GCC$ ATTRIBUTES string.
7644 TODO: We should support all GCC attributes using the same syntax for
7645 the attribute list, i.e. the list in C
7646 __attributes(( attribute-list ))
7648 !GCC$ ATTRIBUTES attribute-list ::
7649 Cf. c-parser.c's c_parser_attributes; the data can then directly be
7652 As there is absolutely no risk of confusion, we should never return
7655 gfc_match_gcc_attributes (void)
7657 symbol_attribute attr;
7658 char name[GFC_MAX_SYMBOL_LEN + 1];
7663 gfc_clear_attr (&attr);
7668 if (gfc_match_name (name) != MATCH_YES)
7671 for (id = 0; id < EXT_ATTR_LAST; id++)
7672 if (strcmp (name, ext_attr_list[id].name) == 0)
7675 if (id == EXT_ATTR_LAST)
7677 gfc_error ("Unknown attribute in !GCC$ ATTRIBUTES statement at %C");
7681 if (gfc_add_ext_attribute (&attr, (ext_attr_id_t) id, &gfc_current_locus)
7685 gfc_gobble_whitespace ();
7686 ch = gfc_next_ascii_char ();
7689 /* This is the successful exit condition for the loop. */
7690 if (gfc_next_ascii_char () == ':')
7700 if (gfc_match_eos () == MATCH_YES)
7705 m = gfc_match_name (name);
7709 if (find_special (name, &sym, true))
7712 sym->attr.ext_attr |= attr.ext_attr;
7714 if (gfc_match_eos () == MATCH_YES)
7717 if (gfc_match_char (',') != MATCH_YES)
7724 gfc_error ("Syntax error in !GCC$ ATTRIBUTES statement at %C");