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 *expr = gfc_int_expr (length);
662 if (gfc_match_char ('(') == MATCH_NO)
665 m = char_len_param_value (expr);
666 if (m != MATCH_YES && gfc_matching_function)
672 if (m == MATCH_ERROR)
677 if (gfc_match_char (')') == MATCH_NO)
679 gfc_free_expr (*expr);
687 gfc_error ("Syntax error in character length specification at %C");
692 /* Special subroutine for finding a symbol. Check if the name is found
693 in the current name space. If not, and we're compiling a function or
694 subroutine and the parent compilation unit is an interface, then check
695 to see if the name we've been given is the name of the interface
696 (located in another namespace). */
699 find_special (const char *name, gfc_symbol **result, bool allow_subroutine)
705 i = gfc_get_sym_tree (name, NULL, &st, allow_subroutine);
708 *result = st ? st->n.sym : NULL;
712 if (gfc_current_state () != COMP_SUBROUTINE
713 && gfc_current_state () != COMP_FUNCTION)
716 s = gfc_state_stack->previous;
720 if (s->state != COMP_INTERFACE)
723 goto end; /* Nameless interface. */
725 if (strcmp (name, s->sym->name) == 0)
736 /* Special subroutine for getting a symbol node associated with a
737 procedure name, used in SUBROUTINE and FUNCTION statements. The
738 symbol is created in the parent using with symtree node in the
739 child unit pointing to the symbol. If the current namespace has no
740 parent, then the symbol is just created in the current unit. */
743 get_proc_name (const char *name, gfc_symbol **result, bool module_fcn_entry)
749 /* Module functions have to be left in their own namespace because
750 they have potentially (almost certainly!) already been referenced.
751 In this sense, they are rather like external functions. This is
752 fixed up in resolve.c(resolve_entries), where the symbol name-
753 space is set to point to the master function, so that the fake
754 result mechanism can work. */
755 if (module_fcn_entry)
757 /* Present if entry is declared to be a module procedure. */
758 rc = gfc_find_symbol (name, gfc_current_ns->parent, 0, result);
761 rc = gfc_get_symbol (name, NULL, result);
762 else if (!gfc_get_symbol (name, NULL, &sym) && sym
763 && (*result)->ts.type == BT_UNKNOWN
764 && sym->attr.flavor == FL_UNKNOWN)
765 /* Pick up the typespec for the entry, if declared in the function
766 body. Note that this symbol is FL_UNKNOWN because it will
767 only have appeared in a type declaration. The local symtree
768 is set to point to the module symbol and a unique symtree
769 to the local version. This latter ensures a correct clearing
772 /* If the ENTRY proceeds its specification, we need to ensure
773 that this does not raise a "has no IMPLICIT type" error. */
774 if (sym->ts.type == BT_UNKNOWN)
775 sym->attr.untyped = 1;
777 (*result)->ts = sym->ts;
779 /* Put the symbol in the procedure namespace so that, should
780 the ENTRY precede its specification, the specification
782 (*result)->ns = gfc_current_ns;
784 gfc_find_sym_tree (name, gfc_current_ns, 0, &st);
786 st = gfc_get_unique_symtree (gfc_current_ns);
791 rc = gfc_get_symbol (name, gfc_current_ns->parent, result);
797 gfc_current_ns->refs++;
799 if (sym && !sym->gfc_new && gfc_current_state () != COMP_INTERFACE)
801 /* Trap another encompassed procedure with the same name. All
802 these conditions are necessary to avoid picking up an entry
803 whose name clashes with that of the encompassing procedure;
804 this is handled using gsymbols to register unique,globally
806 if (sym->attr.flavor != 0
807 && sym->attr.proc != 0
808 && (sym->attr.subroutine || sym->attr.function)
809 && sym->attr.if_source != IFSRC_UNKNOWN)
810 gfc_error_now ("Procedure '%s' at %C is already defined at %L",
811 name, &sym->declared_at);
813 /* Trap a procedure with a name the same as interface in the
814 encompassing scope. */
815 if (sym->attr.generic != 0
816 && (sym->attr.subroutine || sym->attr.function)
817 && !sym->attr.mod_proc)
818 gfc_error_now ("Name '%s' at %C is already defined"
819 " as a generic interface at %L",
820 name, &sym->declared_at);
822 /* Trap declarations of attributes in encompassing scope. The
823 signature for this is that ts.kind is set. Legitimate
824 references only set ts.type. */
825 if (sym->ts.kind != 0
826 && !sym->attr.implicit_type
827 && sym->attr.proc == 0
828 && gfc_current_ns->parent != NULL
829 && sym->attr.access == 0
830 && !module_fcn_entry)
831 gfc_error_now ("Procedure '%s' at %C has an explicit interface "
832 "and must not have attributes declared at %L",
833 name, &sym->declared_at);
836 if (gfc_current_ns->parent == NULL || *result == NULL)
839 /* Module function entries will already have a symtree in
840 the current namespace but will need one at module level. */
841 if (module_fcn_entry)
843 /* Present if entry is declared to be a module procedure. */
844 rc = gfc_find_sym_tree (name, gfc_current_ns->parent, 0, &st);
846 st = gfc_new_symtree (&gfc_current_ns->parent->sym_root, name);
849 st = gfc_new_symtree (&gfc_current_ns->sym_root, name);
854 /* See if the procedure should be a module procedure. */
856 if (((sym->ns->proc_name != NULL
857 && sym->ns->proc_name->attr.flavor == FL_MODULE
858 && sym->attr.proc != PROC_MODULE)
859 || (module_fcn_entry && sym->attr.proc != PROC_MODULE))
860 && gfc_add_procedure (&sym->attr, PROC_MODULE,
861 sym->name, NULL) == FAILURE)
868 /* Verify that the given symbol representing a parameter is C
869 interoperable, by checking to see if it was marked as such after
870 its declaration. If the given symbol is not interoperable, a
871 warning is reported, thus removing the need to return the status to
872 the calling function. The standard does not require the user use
873 one of the iso_c_binding named constants to declare an
874 interoperable parameter, but we can't be sure if the param is C
875 interop or not if the user doesn't. For example, integer(4) may be
876 legal Fortran, but doesn't have meaning in C. It may interop with
877 a number of the C types, which causes a problem because the
878 compiler can't know which one. This code is almost certainly not
879 portable, and the user will get what they deserve if the C type
880 across platforms isn't always interoperable with integer(4). If
881 the user had used something like integer(c_int) or integer(c_long),
882 the compiler could have automatically handled the varying sizes
886 verify_c_interop_param (gfc_symbol *sym)
888 int is_c_interop = 0;
889 gfc_try retval = SUCCESS;
891 /* We check implicitly typed variables in symbol.c:gfc_set_default_type().
892 Don't repeat the checks here. */
893 if (sym->attr.implicit_type)
896 /* For subroutines or functions that are passed to a BIND(C) procedure,
897 they're interoperable if they're BIND(C) and their params are all
899 if (sym->attr.flavor == FL_PROCEDURE)
901 if (sym->attr.is_bind_c == 0)
903 gfc_error_now ("Procedure '%s' at %L must have the BIND(C) "
904 "attribute to be C interoperable", sym->name,
905 &(sym->declared_at));
911 if (sym->attr.is_c_interop == 1)
912 /* We've already checked this procedure; don't check it again. */
915 return verify_bind_c_sym (sym, &(sym->ts), sym->attr.in_common,
920 /* See if we've stored a reference to a procedure that owns sym. */
921 if (sym->ns != NULL && sym->ns->proc_name != NULL)
923 if (sym->ns->proc_name->attr.is_bind_c == 1)
926 (verify_c_interop (&(sym->ts))
929 if (is_c_interop != 1)
931 /* Make personalized messages to give better feedback. */
932 if (sym->ts.type == BT_DERIVED)
933 gfc_error ("Type '%s' at %L is a parameter to the BIND(C) "
934 " procedure '%s' but is not C interoperable "
935 "because derived type '%s' is not C interoperable",
936 sym->name, &(sym->declared_at),
937 sym->ns->proc_name->name,
938 sym->ts.derived->name);
940 gfc_warning ("Variable '%s' at %L is a parameter to the "
941 "BIND(C) procedure '%s' but may not be C "
943 sym->name, &(sym->declared_at),
944 sym->ns->proc_name->name);
947 /* Character strings are only C interoperable if they have a
949 if (sym->ts.type == BT_CHARACTER)
951 gfc_charlen *cl = sym->ts.cl;
952 if (!cl || !cl->length || cl->length->expr_type != EXPR_CONSTANT
953 || mpz_cmp_si (cl->length->value.integer, 1) != 0)
955 gfc_error ("Character argument '%s' at %L "
956 "must be length 1 because "
957 "procedure '%s' is BIND(C)",
958 sym->name, &sym->declared_at,
959 sym->ns->proc_name->name);
964 /* We have to make sure that any param to a bind(c) routine does
965 not have the allocatable, pointer, or optional attributes,
966 according to J3/04-007, section 5.1. */
967 if (sym->attr.allocatable == 1)
969 gfc_error ("Variable '%s' at %L cannot have the "
970 "ALLOCATABLE attribute because procedure '%s'"
971 " is BIND(C)", sym->name, &(sym->declared_at),
972 sym->ns->proc_name->name);
976 if (sym->attr.pointer == 1)
978 gfc_error ("Variable '%s' at %L cannot have the "
979 "POINTER attribute because procedure '%s'"
980 " is BIND(C)", sym->name, &(sym->declared_at),
981 sym->ns->proc_name->name);
985 if (sym->attr.optional == 1)
987 gfc_error ("Variable '%s' at %L cannot have the "
988 "OPTIONAL attribute because procedure '%s'"
989 " is BIND(C)", sym->name, &(sym->declared_at),
990 sym->ns->proc_name->name);
994 /* Make sure that if it has the dimension attribute, that it is
995 either assumed size or explicit shape. */
998 if (sym->as->type == AS_ASSUMED_SHAPE)
1000 gfc_error ("Assumed-shape array '%s' at %L cannot be an "
1001 "argument to the procedure '%s' at %L because "
1002 "the procedure is BIND(C)", sym->name,
1003 &(sym->declared_at), sym->ns->proc_name->name,
1004 &(sym->ns->proc_name->declared_at));
1008 if (sym->as->type == AS_DEFERRED)
1010 gfc_error ("Deferred-shape array '%s' at %L cannot be an "
1011 "argument to the procedure '%s' at %L because "
1012 "the procedure is BIND(C)", sym->name,
1013 &(sym->declared_at), sym->ns->proc_name->name,
1014 &(sym->ns->proc_name->declared_at));
1025 /* Function called by variable_decl() that adds a name to the symbol table. */
1028 build_sym (const char *name, gfc_charlen *cl,
1029 gfc_array_spec **as, locus *var_locus)
1031 symbol_attribute attr;
1034 if (gfc_get_symbol (name, NULL, &sym))
1037 /* Start updating the symbol table. Add basic type attribute if present. */
1038 if (current_ts.type != BT_UNKNOWN
1039 && (sym->attr.implicit_type == 0
1040 || !gfc_compare_types (&sym->ts, ¤t_ts))
1041 && gfc_add_type (sym, ¤t_ts, var_locus) == FAILURE)
1044 if (sym->ts.type == BT_CHARACTER)
1047 /* Add dimension attribute if present. */
1048 if (gfc_set_array_spec (sym, *as, var_locus) == FAILURE)
1052 /* Add attribute to symbol. The copy is so that we can reset the
1053 dimension attribute. */
1054 attr = current_attr;
1057 if (gfc_copy_attr (&sym->attr, &attr, var_locus) == FAILURE)
1060 /* Finish any work that may need to be done for the binding label,
1061 if it's a bind(c). The bind(c) attr is found before the symbol
1062 is made, and before the symbol name (for data decls), so the
1063 current_ts is holding the binding label, or nothing if the
1064 name= attr wasn't given. Therefore, test here if we're dealing
1065 with a bind(c) and make sure the binding label is set correctly. */
1066 if (sym->attr.is_bind_c == 1)
1068 if (sym->binding_label[0] == '\0')
1070 /* Set the binding label and verify that if a NAME= was specified
1071 then only one identifier was in the entity-decl-list. */
1072 if (set_binding_label (sym->binding_label, sym->name,
1073 num_idents_on_line) == FAILURE)
1078 /* See if we know we're in a common block, and if it's a bind(c)
1079 common then we need to make sure we're an interoperable type. */
1080 if (sym->attr.in_common == 1)
1082 /* Test the common block object. */
1083 if (sym->common_block != NULL && sym->common_block->is_bind_c == 1
1084 && sym->ts.is_c_interop != 1)
1086 gfc_error_now ("Variable '%s' in common block '%s' at %C "
1087 "must be declared with a C interoperable "
1088 "kind since common block '%s' is BIND(C)",
1089 sym->name, sym->common_block->name,
1090 sym->common_block->name);
1095 sym->attr.implied_index = 0;
1101 /* Set character constant to the given length. The constant will be padded or
1102 truncated. If we're inside an array constructor without a typespec, we
1103 additionally check that all elements have the same length; check_len -1
1104 means no checking. */
1107 gfc_set_constant_character_len (int len, gfc_expr *expr, int check_len)
1112 gcc_assert (expr->expr_type == EXPR_CONSTANT);
1113 gcc_assert (expr->ts.type == BT_CHARACTER);
1115 slen = expr->value.character.length;
1118 s = gfc_get_wide_string (len + 1);
1119 memcpy (s, expr->value.character.string,
1120 MIN (len, slen) * sizeof (gfc_char_t));
1122 gfc_wide_memset (&s[slen], ' ', len - slen);
1124 if (gfc_option.warn_character_truncation && slen > len)
1125 gfc_warning_now ("CHARACTER expression at %L is being truncated "
1126 "(%d/%d)", &expr->where, slen, len);
1128 /* Apply the standard by 'hand' otherwise it gets cleared for
1130 if (check_len != -1 && slen != check_len
1131 && !(gfc_option.allow_std & GFC_STD_GNU))
1132 gfc_error_now ("The CHARACTER elements of the array constructor "
1133 "at %L must have the same length (%d/%d)",
1134 &expr->where, slen, check_len);
1137 gfc_free (expr->value.character.string);
1138 expr->value.character.string = s;
1139 expr->value.character.length = len;
1144 /* Function to create and update the enumerator history
1145 using the information passed as arguments.
1146 Pointer "max_enum" is also updated, to point to
1147 enum history node containing largest initializer.
1149 SYM points to the symbol node of enumerator.
1150 INIT points to its enumerator value. */
1153 create_enum_history (gfc_symbol *sym, gfc_expr *init)
1155 enumerator_history *new_enum_history;
1156 gcc_assert (sym != NULL && init != NULL);
1158 new_enum_history = XCNEW (enumerator_history);
1160 new_enum_history->sym = sym;
1161 new_enum_history->initializer = init;
1162 new_enum_history->next = NULL;
1164 if (enum_history == NULL)
1166 enum_history = new_enum_history;
1167 max_enum = enum_history;
1171 new_enum_history->next = enum_history;
1172 enum_history = new_enum_history;
1174 if (mpz_cmp (max_enum->initializer->value.integer,
1175 new_enum_history->initializer->value.integer) < 0)
1176 max_enum = new_enum_history;
1181 /* Function to free enum kind history. */
1184 gfc_free_enum_history (void)
1186 enumerator_history *current = enum_history;
1187 enumerator_history *next;
1189 while (current != NULL)
1191 next = current->next;
1196 enum_history = NULL;
1200 /* Function called by variable_decl() that adds an initialization
1201 expression to a symbol. */
1204 add_init_expr_to_sym (const char *name, gfc_expr **initp, locus *var_locus)
1206 symbol_attribute attr;
1211 if (find_special (name, &sym, false))
1216 /* If this symbol is confirming an implicit parameter type,
1217 then an initialization expression is not allowed. */
1218 if (attr.flavor == FL_PARAMETER
1219 && sym->value != NULL
1222 gfc_error ("Initializer not allowed for PARAMETER '%s' at %C",
1229 /* An initializer is required for PARAMETER declarations. */
1230 if (attr.flavor == FL_PARAMETER)
1232 gfc_error ("PARAMETER at %L is missing an initializer", var_locus);
1238 /* If a variable appears in a DATA block, it cannot have an
1242 gfc_error ("Variable '%s' at %C with an initializer already "
1243 "appears in a DATA statement", sym->name);
1247 /* Check if the assignment can happen. This has to be put off
1248 until later for a derived type variable. */
1249 if (sym->ts.type != BT_DERIVED && init->ts.type != BT_DERIVED
1250 && gfc_check_assign_symbol (sym, init) == FAILURE)
1253 if (sym->ts.type == BT_CHARACTER && sym->ts.cl)
1255 /* Update symbol character length according initializer. */
1256 if (sym->ts.cl->length == NULL)
1259 /* If there are multiple CHARACTER variables declared on the
1260 same line, we don't want them to share the same length. */
1261 sym->ts.cl = gfc_new_charlen (gfc_current_ns);
1263 if (sym->attr.flavor == FL_PARAMETER)
1265 if (init->expr_type == EXPR_CONSTANT)
1267 clen = init->value.character.length;
1268 sym->ts.cl->length = gfc_int_expr (clen);
1270 else if (init->expr_type == EXPR_ARRAY)
1272 gfc_expr *p = init->value.constructor->expr;
1273 clen = p->value.character.length;
1274 sym->ts.cl->length = gfc_int_expr (clen);
1276 else if (init->ts.cl && init->ts.cl->length)
1277 sym->ts.cl->length =
1278 gfc_copy_expr (sym->value->ts.cl->length);
1281 /* Update initializer character length according symbol. */
1282 else if (sym->ts.cl->length->expr_type == EXPR_CONSTANT)
1284 int len = mpz_get_si (sym->ts.cl->length->value.integer);
1285 gfc_constructor * p;
1287 if (init->expr_type == EXPR_CONSTANT)
1288 gfc_set_constant_character_len (len, init, -1);
1289 else if (init->expr_type == EXPR_ARRAY)
1291 /* Build a new charlen to prevent simplification from
1292 deleting the length before it is resolved. */
1293 init->ts.cl = gfc_new_charlen (gfc_current_ns);
1294 init->ts.cl->length = gfc_copy_expr (sym->ts.cl->length);
1296 for (p = init->value.constructor; p; p = p->next)
1297 gfc_set_constant_character_len (len, p->expr, -1);
1302 /* Need to check if the expression we initialized this
1303 to was one of the iso_c_binding named constants. If so,
1304 and we're a parameter (constant), let it be iso_c.
1306 integer(c_int), parameter :: my_int = c_int
1307 integer(my_int) :: my_int_2
1308 If we mark my_int as iso_c (since we can see it's value
1309 is equal to one of the named constants), then my_int_2
1310 will be considered C interoperable. */
1311 if (sym->ts.type != BT_CHARACTER && sym->ts.type != BT_DERIVED)
1313 sym->ts.is_iso_c |= init->ts.is_iso_c;
1314 sym->ts.is_c_interop |= init->ts.is_c_interop;
1315 /* attr bits needed for module files. */
1316 sym->attr.is_iso_c |= init->ts.is_iso_c;
1317 sym->attr.is_c_interop |= init->ts.is_c_interop;
1318 if (init->ts.is_iso_c)
1319 sym->ts.f90_type = init->ts.f90_type;
1322 /* Add initializer. Make sure we keep the ranks sane. */
1323 if (sym->attr.dimension && init->rank == 0)
1329 if (sym->attr.flavor == FL_PARAMETER
1330 && init->expr_type == EXPR_CONSTANT
1331 && spec_size (sym->as, &size) == SUCCESS
1332 && mpz_cmp_si (size, 0) > 0)
1334 array = gfc_start_constructor (init->ts.type, init->ts.kind,
1337 array->value.constructor = c = NULL;
1338 for (n = 0; n < (int)mpz_get_si (size); n++)
1340 if (array->value.constructor == NULL)
1342 array->value.constructor = c = gfc_get_constructor ();
1347 c->next = gfc_get_constructor ();
1349 c->expr = gfc_copy_expr (init);
1353 array->shape = gfc_get_shape (sym->as->rank);
1354 for (n = 0; n < sym->as->rank; n++)
1355 spec_dimen_size (sym->as, n, &array->shape[n]);
1360 init->rank = sym->as->rank;
1364 if (sym->attr.save == SAVE_NONE)
1365 sym->attr.save = SAVE_IMPLICIT;
1373 /* Function called by variable_decl() that adds a name to a structure
1377 build_struct (const char *name, gfc_charlen *cl, gfc_expr **init,
1378 gfc_array_spec **as)
1382 /* If the current symbol is of the same derived type that we're
1383 constructing, it must have the pointer attribute. */
1384 if (current_ts.type == BT_DERIVED
1385 && current_ts.derived == gfc_current_block ()
1386 && current_attr.pointer == 0)
1388 gfc_error ("Component at %C must have the POINTER attribute");
1392 if (gfc_current_block ()->attr.pointer && (*as)->rank != 0)
1394 if ((*as)->type != AS_DEFERRED && (*as)->type != AS_EXPLICIT)
1396 gfc_error ("Array component of structure at %C must have explicit "
1397 "or deferred shape");
1402 if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE)
1407 c->attr = current_attr;
1409 c->initializer = *init;
1414 c->attr.dimension = 1;
1417 /* Should this ever get more complicated, combine with similar section
1418 in add_init_expr_to_sym into a separate function. */
1419 if (c->ts.type == BT_CHARACTER && !c->attr.pointer && c->initializer && c->ts.cl
1420 && c->ts.cl->length && c->ts.cl->length->expr_type == EXPR_CONSTANT)
1424 gcc_assert (c->ts.cl && c->ts.cl->length);
1425 gcc_assert (c->ts.cl->length->expr_type == EXPR_CONSTANT);
1426 gcc_assert (c->ts.cl->length->ts.type == BT_INTEGER);
1428 len = mpz_get_si (c->ts.cl->length->value.integer);
1430 if (c->initializer->expr_type == EXPR_CONSTANT)
1431 gfc_set_constant_character_len (len, c->initializer, -1);
1432 else if (mpz_cmp (c->ts.cl->length->value.integer,
1433 c->initializer->ts.cl->length->value.integer))
1436 gfc_constructor *ctor = c->initializer->value.constructor;
1438 has_ts = (c->initializer->ts.cl
1439 && c->initializer->ts.cl->length_from_typespec);
1445 /* Remember the length of the first element for checking
1446 that all elements *in the constructor* have the same
1447 length. This need not be the length of the LHS! */
1448 gcc_assert (ctor->expr->expr_type == EXPR_CONSTANT);
1449 gcc_assert (ctor->expr->ts.type == BT_CHARACTER);
1450 first_len = ctor->expr->value.character.length;
1452 for (; ctor; ctor = ctor->next)
1454 if (ctor->expr->expr_type == EXPR_CONSTANT)
1455 gfc_set_constant_character_len (len, ctor->expr,
1456 has_ts ? -1 : first_len);
1462 /* Check array components. */
1463 if (!c->attr.dimension)
1465 if (c->attr.allocatable)
1467 gfc_error ("Allocatable component at %C must be an array");
1474 if (c->attr.pointer)
1476 if (c->as->type != AS_DEFERRED)
1478 gfc_error ("Pointer array component of structure at %C must have a "
1483 else if (c->attr.allocatable)
1485 if (c->as->type != AS_DEFERRED)
1487 gfc_error ("Allocatable component of structure at %C must have a "
1494 if (c->as->type != AS_EXPLICIT)
1496 gfc_error ("Array component of structure at %C must have an "
1506 /* Match a 'NULL()', and possibly take care of some side effects. */
1509 gfc_match_null (gfc_expr **result)
1515 m = gfc_match (" null ( )");
1519 /* The NULL symbol now has to be/become an intrinsic function. */
1520 if (gfc_get_symbol ("null", NULL, &sym))
1522 gfc_error ("NULL() initialization at %C is ambiguous");
1526 gfc_intrinsic_symbol (sym);
1528 if (sym->attr.proc != PROC_INTRINSIC
1529 && (gfc_add_procedure (&sym->attr, PROC_INTRINSIC,
1530 sym->name, NULL) == FAILURE
1531 || gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE))
1534 e = gfc_get_expr ();
1535 e->where = gfc_current_locus;
1536 e->expr_type = EXPR_NULL;
1537 e->ts.type = BT_UNKNOWN;
1545 /* Match a variable name with an optional initializer. When this
1546 subroutine is called, a variable is expected to be parsed next.
1547 Depending on what is happening at the moment, updates either the
1548 symbol table or the current interface. */
1551 variable_decl (int elem)
1553 char name[GFC_MAX_SYMBOL_LEN + 1];
1554 gfc_expr *initializer, *char_len;
1556 gfc_array_spec *cp_as; /* Extra copy for Cray Pointees. */
1567 old_locus = gfc_current_locus;
1569 /* When we get here, we've just matched a list of attributes and
1570 maybe a type and a double colon. The next thing we expect to see
1571 is the name of the symbol. */
1572 m = gfc_match_name (name);
1576 var_locus = gfc_current_locus;
1578 /* Now we could see the optional array spec. or character length. */
1579 m = gfc_match_array_spec (&as);
1580 if (gfc_option.flag_cray_pointer && m == MATCH_YES)
1581 cp_as = gfc_copy_array_spec (as);
1582 else if (m == MATCH_ERROR)
1586 as = gfc_copy_array_spec (current_as);
1591 if (current_ts.type == BT_CHARACTER)
1593 switch (match_char_length (&char_len))
1596 cl = gfc_new_charlen (gfc_current_ns);
1598 cl->length = char_len;
1601 /* Non-constant lengths need to be copied after the first
1602 element. Also copy assumed lengths. */
1605 && (current_ts.cl->length == NULL
1606 || current_ts.cl->length->expr_type != EXPR_CONSTANT))
1608 cl = gfc_new_charlen (gfc_current_ns);
1609 cl->length = gfc_copy_expr (current_ts.cl->length);
1621 /* If this symbol has already shown up in a Cray Pointer declaration,
1622 then we want to set the type & bail out. */
1623 if (gfc_option.flag_cray_pointer)
1625 gfc_find_symbol (name, gfc_current_ns, 1, &sym);
1626 if (sym != NULL && sym->attr.cray_pointee)
1628 sym->ts.type = current_ts.type;
1629 sym->ts.kind = current_ts.kind;
1631 sym->ts.derived = current_ts.derived;
1632 sym->ts.is_c_interop = current_ts.is_c_interop;
1633 sym->ts.is_iso_c = current_ts.is_iso_c;
1636 /* Check to see if we have an array specification. */
1639 if (sym->as != NULL)
1641 gfc_error ("Duplicate array spec for Cray pointee at %C");
1642 gfc_free_array_spec (cp_as);
1648 if (gfc_set_array_spec (sym, cp_as, &var_locus) == FAILURE)
1649 gfc_internal_error ("Couldn't set pointee array spec.");
1651 /* Fix the array spec. */
1652 m = gfc_mod_pointee_as (sym->as);
1653 if (m == MATCH_ERROR)
1661 gfc_free_array_spec (cp_as);
1665 /* Procedure pointer as function result. */
1666 if (gfc_current_state () == COMP_FUNCTION
1667 && strcmp ("ppr@", gfc_current_block ()->name) == 0
1668 && strcmp (name, gfc_current_block ()->ns->proc_name->name) == 0)
1669 strcpy (name, "ppr@");
1671 if (gfc_current_state () == COMP_FUNCTION
1672 && strcmp (name, gfc_current_block ()->name) == 0
1673 && gfc_current_block ()->result
1674 && strcmp ("ppr@", gfc_current_block ()->result->name) == 0)
1675 strcpy (name, "ppr@");
1677 /* OK, we've successfully matched the declaration. Now put the
1678 symbol in the current namespace, because it might be used in the
1679 optional initialization expression for this symbol, e.g. this is
1682 integer, parameter :: i = huge(i)
1684 This is only true for parameters or variables of a basic type.
1685 For components of derived types, it is not true, so we don't
1686 create a symbol for those yet. If we fail to create the symbol,
1688 if (gfc_current_state () != COMP_DERIVED
1689 && build_sym (name, cl, &as, &var_locus) == FAILURE)
1695 /* An interface body specifies all of the procedure's
1696 characteristics and these shall be consistent with those
1697 specified in the procedure definition, except that the interface
1698 may specify a procedure that is not pure if the procedure is
1699 defined to be pure(12.3.2). */
1700 if (current_ts.type == BT_DERIVED
1701 && gfc_current_ns->proc_name
1702 && gfc_current_ns->proc_name->attr.if_source == IFSRC_IFBODY
1703 && current_ts.derived->ns != gfc_current_ns)
1706 st = gfc_find_symtree (gfc_current_ns->sym_root, current_ts.derived->name);
1707 if (!(current_ts.derived->attr.imported
1709 && st->n.sym == current_ts.derived)
1710 && !gfc_current_ns->has_import_set)
1712 gfc_error ("the type of '%s' at %C has not been declared within the "
1719 /* In functions that have a RESULT variable defined, the function
1720 name always refers to function calls. Therefore, the name is
1721 not allowed to appear in specification statements. */
1722 if (gfc_current_state () == COMP_FUNCTION
1723 && gfc_current_block () != NULL
1724 && gfc_current_block ()->result != NULL
1725 && gfc_current_block ()->result != gfc_current_block ()
1726 && strcmp (gfc_current_block ()->name, name) == 0)
1728 gfc_error ("Function name '%s' not allowed at %C", name);
1733 /* We allow old-style initializations of the form
1734 integer i /2/, j(4) /3*3, 1/
1735 (if no colon has been seen). These are different from data
1736 statements in that initializers are only allowed to apply to the
1737 variable immediately preceding, i.e.
1739 is not allowed. Therefore we have to do some work manually, that
1740 could otherwise be left to the matchers for DATA statements. */
1742 if (!colon_seen && gfc_match (" /") == MATCH_YES)
1744 if (gfc_notify_std (GFC_STD_GNU, "Extension: Old-style "
1745 "initialization at %C") == FAILURE)
1748 return match_old_style_init (name);
1751 /* The double colon must be present in order to have initializers.
1752 Otherwise the statement is ambiguous with an assignment statement. */
1755 if (gfc_match (" =>") == MATCH_YES)
1757 if (!current_attr.pointer)
1759 gfc_error ("Initialization at %C isn't for a pointer variable");
1764 m = gfc_match_null (&initializer);
1767 gfc_error ("Pointer initialization requires a NULL() at %C");
1771 if (gfc_pure (NULL))
1773 gfc_error ("Initialization of pointer at %C is not allowed in "
1774 "a PURE procedure");
1782 else if (gfc_match_char ('=') == MATCH_YES)
1784 if (current_attr.pointer)
1786 gfc_error ("Pointer initialization at %C requires '=>', "
1792 m = gfc_match_init_expr (&initializer);
1795 gfc_error ("Expected an initialization expression at %C");
1799 if (current_attr.flavor != FL_PARAMETER && gfc_pure (NULL))
1801 gfc_error ("Initialization of variable at %C is not allowed in "
1802 "a PURE procedure");
1811 if (initializer != NULL && current_attr.allocatable
1812 && gfc_current_state () == COMP_DERIVED)
1814 gfc_error ("Initialization of allocatable component at %C is not "
1820 /* Add the initializer. Note that it is fine if initializer is
1821 NULL here, because we sometimes also need to check if a
1822 declaration *must* have an initialization expression. */
1823 if (gfc_current_state () != COMP_DERIVED)
1824 t = add_init_expr_to_sym (name, &initializer, &var_locus);
1827 if (current_ts.type == BT_DERIVED
1828 && !current_attr.pointer && !initializer)
1829 initializer = gfc_default_initializer (¤t_ts);
1830 t = build_struct (name, cl, &initializer, &as);
1833 m = (t == SUCCESS) ? MATCH_YES : MATCH_ERROR;
1836 /* Free stuff up and return. */
1837 gfc_free_expr (initializer);
1838 gfc_free_array_spec (as);
1844 /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification.
1845 This assumes that the byte size is equal to the kind number for
1846 non-COMPLEX types, and equal to twice the kind number for COMPLEX. */
1849 gfc_match_old_kind_spec (gfc_typespec *ts)
1854 if (gfc_match_char ('*') != MATCH_YES)
1857 m = gfc_match_small_literal_int (&ts->kind, NULL);
1861 original_kind = ts->kind;
1863 /* Massage the kind numbers for complex types. */
1864 if (ts->type == BT_COMPLEX)
1868 gfc_error ("Old-style type declaration %s*%d not supported at %C",
1869 gfc_basic_typename (ts->type), original_kind);
1875 if (gfc_validate_kind (ts->type, ts->kind, true) < 0)
1877 gfc_error ("Old-style type declaration %s*%d not supported at %C",
1878 gfc_basic_typename (ts->type), original_kind);
1882 if (gfc_notify_std (GFC_STD_GNU, "Nonstandard type declaration %s*%d at %C",
1883 gfc_basic_typename (ts->type), original_kind) == FAILURE)
1890 /* Match a kind specification. Since kinds are generally optional, we
1891 usually return MATCH_NO if something goes wrong. If a "kind="
1892 string is found, then we know we have an error. */
1895 gfc_match_kind_spec (gfc_typespec *ts, bool kind_expr_only)
1907 where = loc = gfc_current_locus;
1912 if (gfc_match_char ('(') == MATCH_NO)
1915 /* Also gobbles optional text. */
1916 if (gfc_match (" kind = ") == MATCH_YES)
1919 loc = gfc_current_locus;
1922 n = gfc_match_init_expr (&e);
1926 if (gfc_matching_function)
1928 /* The function kind expression might include use associated or
1929 imported parameters and try again after the specification
1931 if (gfc_match_char (')') != MATCH_YES)
1933 gfc_error ("Missing right parenthesis at %C");
1939 gfc_undo_symbols ();
1944 /* ....or else, the match is real. */
1946 gfc_error ("Expected initialization expression at %C");
1954 gfc_error ("Expected scalar initialization expression at %C");
1959 msg = gfc_extract_int (e, &ts->kind);
1968 /* Before throwing away the expression, let's see if we had a
1969 C interoperable kind (and store the fact). */
1970 if (e->ts.is_c_interop == 1)
1972 /* Mark this as c interoperable if being declared with one
1973 of the named constants from iso_c_binding. */
1974 ts->is_c_interop = e->ts.is_iso_c;
1975 ts->f90_type = e->ts.f90_type;
1981 /* Ignore errors to this point, if we've gotten here. This means
1982 we ignore the m=MATCH_ERROR from above. */
1983 if (gfc_validate_kind (ts->type, ts->kind, true) < 0)
1985 gfc_error ("Kind %d not supported for type %s at %C", ts->kind,
1986 gfc_basic_typename (ts->type));
1987 gfc_current_locus = where;
1991 /* Warn if, e.g., c_int is used for a REAL variable, but not
1992 if, e.g., c_double is used for COMPLEX as the standard
1993 explicitly says that the kind type parameter for complex and real
1994 variable is the same, i.e. c_float == c_float_complex. */
1995 if (ts->f90_type != BT_UNKNOWN && ts->f90_type != ts->type
1996 && !((ts->f90_type == BT_REAL && ts->type == BT_COMPLEX)
1997 || (ts->f90_type == BT_COMPLEX && ts->type == BT_REAL)))
1998 gfc_warning_now ("C kind type parameter is for type %s but type at %L "
1999 "is %s", gfc_basic_typename (ts->f90_type), &where,
2000 gfc_basic_typename (ts->type));
2002 gfc_gobble_whitespace ();
2003 if ((c = gfc_next_ascii_char ()) != ')'
2004 && (ts->type != BT_CHARACTER || c != ','))
2006 if (ts->type == BT_CHARACTER)
2007 gfc_error ("Missing right parenthesis or comma at %C");
2009 gfc_error ("Missing right parenthesis at %C");
2013 /* All tests passed. */
2016 if(m == MATCH_ERROR)
2017 gfc_current_locus = where;
2019 /* Return what we know from the test(s). */
2024 gfc_current_locus = where;
2030 match_char_kind (int * kind, int * is_iso_c)
2039 where = gfc_current_locus;
2041 n = gfc_match_init_expr (&e);
2043 if (n != MATCH_YES && gfc_matching_function)
2045 /* The expression might include use-associated or imported
2046 parameters and try again after the specification
2049 gfc_undo_symbols ();
2054 gfc_error ("Expected initialization expression at %C");
2060 gfc_error ("Expected scalar initialization expression at %C");
2065 msg = gfc_extract_int (e, kind);
2066 *is_iso_c = e->ts.is_iso_c;
2076 /* Ignore errors to this point, if we've gotten here. This means
2077 we ignore the m=MATCH_ERROR from above. */
2078 if (gfc_validate_kind (BT_CHARACTER, *kind, true) < 0)
2080 gfc_error ("Kind %d is not supported for CHARACTER at %C", *kind);
2084 /* All tests passed. */
2087 if (m == MATCH_ERROR)
2088 gfc_current_locus = where;
2090 /* Return what we know from the test(s). */
2095 gfc_current_locus = where;
2099 /* Match the various kind/length specifications in a CHARACTER
2100 declaration. We don't return MATCH_NO. */
2103 match_char_spec (gfc_typespec *ts)
2105 int kind, seen_length, is_iso_c;
2115 /* Try the old-style specification first. */
2116 old_char_selector = 0;
2118 m = match_char_length (&len);
2122 old_char_selector = 1;
2127 m = gfc_match_char ('(');
2130 m = MATCH_YES; /* Character without length is a single char. */
2134 /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ). */
2135 if (gfc_match (" kind =") == MATCH_YES)
2137 m = match_char_kind (&kind, &is_iso_c);
2139 if (m == MATCH_ERROR)
2144 if (gfc_match (" , len =") == MATCH_NO)
2147 m = char_len_param_value (&len);
2150 if (m == MATCH_ERROR)
2157 /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>". */
2158 if (gfc_match (" len =") == MATCH_YES)
2160 m = char_len_param_value (&len);
2163 if (m == MATCH_ERROR)
2167 if (gfc_match_char (')') == MATCH_YES)
2170 if (gfc_match (" , kind =") != MATCH_YES)
2173 if (match_char_kind (&kind, &is_iso_c) == MATCH_ERROR)
2179 /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */
2180 m = char_len_param_value (&len);
2183 if (m == MATCH_ERROR)
2187 m = gfc_match_char (')');
2191 if (gfc_match_char (',') != MATCH_YES)
2194 gfc_match (" kind ="); /* Gobble optional text. */
2196 m = match_char_kind (&kind, &is_iso_c);
2197 if (m == MATCH_ERROR)
2203 /* Require a right-paren at this point. */
2204 m = gfc_match_char (')');
2209 gfc_error ("Syntax error in CHARACTER declaration at %C");
2211 gfc_free_expr (len);
2215 /* Deal with character functions after USE and IMPORT statements. */
2216 if (gfc_matching_function)
2218 gfc_free_expr (len);
2219 gfc_undo_symbols ();
2225 gfc_free_expr (len);
2229 /* Do some final massaging of the length values. */
2230 cl = gfc_new_charlen (gfc_current_ns);
2232 if (seen_length == 0)
2233 cl->length = gfc_int_expr (1);
2238 ts->kind = kind == 0 ? gfc_default_character_kind : kind;
2240 /* We have to know if it was a c interoperable kind so we can
2241 do accurate type checking of bind(c) procs, etc. */
2243 /* Mark this as c interoperable if being declared with one
2244 of the named constants from iso_c_binding. */
2245 ts->is_c_interop = is_iso_c;
2246 else if (len != NULL)
2247 /* Here, we might have parsed something such as: character(c_char)
2248 In this case, the parsing code above grabs the c_char when
2249 looking for the length (line 1690, roughly). it's the last
2250 testcase for parsing the kind params of a character variable.
2251 However, it's not actually the length. this seems like it
2253 To see if the user used a C interop kind, test the expr
2254 of the so called length, and see if it's C interoperable. */
2255 ts->is_c_interop = len->ts.is_iso_c;
2261 /* Matches a type specification. If successful, sets the ts structure
2262 to the matched specification. This is necessary for FUNCTION and
2263 IMPLICIT statements.
2265 If implicit_flag is nonzero, then we don't check for the optional
2266 kind specification. Not doing so is needed for matching an IMPLICIT
2267 statement correctly. */
2270 gfc_match_type_spec (gfc_typespec *ts, int implicit_flag)
2272 char name[GFC_MAX_SYMBOL_LEN + 1];
2276 bool seen_deferred_kind;
2278 /* A belt and braces check that the typespec is correctly being treated
2279 as a deferred characteristic association. */
2280 seen_deferred_kind = (gfc_current_state () == COMP_FUNCTION)
2281 && (gfc_current_block ()->result->ts.kind == -1)
2282 && (ts->kind == -1);
2284 if (seen_deferred_kind)
2287 /* Clear the current binding label, in case one is given. */
2288 curr_binding_label[0] = '\0';
2290 if (gfc_match (" byte") == MATCH_YES)
2292 if (gfc_notify_std(GFC_STD_GNU, "Extension: BYTE type at %C")
2296 if (gfc_validate_kind (BT_INTEGER, 1, true) < 0)
2298 gfc_error ("BYTE type used at %C "
2299 "is not available on the target machine");
2303 ts->type = BT_INTEGER;
2308 if (gfc_match (" integer") == MATCH_YES)
2310 ts->type = BT_INTEGER;
2311 ts->kind = gfc_default_integer_kind;
2315 if (gfc_match (" character") == MATCH_YES)
2317 ts->type = BT_CHARACTER;
2318 if (implicit_flag == 0)
2319 return match_char_spec (ts);
2324 if (gfc_match (" real") == MATCH_YES)
2327 ts->kind = gfc_default_real_kind;
2331 if (gfc_match (" double precision") == MATCH_YES)
2334 ts->kind = gfc_default_double_kind;
2338 if (gfc_match (" complex") == MATCH_YES)
2340 ts->type = BT_COMPLEX;
2341 ts->kind = gfc_default_complex_kind;
2345 if (gfc_match (" double complex") == MATCH_YES)
2347 if (gfc_notify_std (GFC_STD_GNU, "DOUBLE COMPLEX at %C does not "
2348 "conform to the Fortran 95 standard") == FAILURE)
2351 ts->type = BT_COMPLEX;
2352 ts->kind = gfc_default_double_kind;
2356 if (gfc_match (" logical") == MATCH_YES)
2358 ts->type = BT_LOGICAL;
2359 ts->kind = gfc_default_logical_kind;
2363 m = gfc_match (" type ( %n )", name);
2367 ts->type = BT_DERIVED;
2369 /* Defer association of the derived type until the end of the
2370 specification block. However, if the derived type can be
2371 found, add it to the typespec. */
2372 if (gfc_matching_function)
2375 if (gfc_current_state () != COMP_INTERFACE
2376 && !gfc_find_symbol (name, NULL, 1, &sym) && sym)
2381 /* Search for the name but allow the components to be defined later. If
2382 type = -1, this typespec has been seen in a function declaration but
2383 the type could not be accessed at that point. */
2385 if (ts->kind != -1 && gfc_get_ha_symbol (name, &sym))
2387 gfc_error ("Type name '%s' at %C is ambiguous", name);
2390 else if (ts->kind == -1)
2392 int iface = gfc_state_stack->previous->state != COMP_INTERFACE
2393 || gfc_current_ns->has_import_set;
2394 if (gfc_find_symbol (name, NULL, iface, &sym))
2396 gfc_error ("Type name '%s' at %C is ambiguous", name);
2405 if (sym->attr.flavor != FL_DERIVED
2406 && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE)
2409 gfc_set_sym_referenced (sym);
2415 /* For all types except double, derived and character, look for an
2416 optional kind specifier. MATCH_NO is actually OK at this point. */
2417 if (implicit_flag == 1)
2420 if (gfc_current_form == FORM_FREE)
2422 c = gfc_peek_ascii_char();
2423 if (!gfc_is_whitespace(c) && c != '*' && c != '('
2424 && c != ':' && c != ',')
2428 m = gfc_match_kind_spec (ts, false);
2429 if (m == MATCH_NO && ts->type != BT_CHARACTER)
2430 m = gfc_match_old_kind_spec (ts);
2432 /* Defer association of the KIND expression of function results
2433 until after USE and IMPORT statements. */
2434 if ((gfc_current_state () == COMP_NONE && gfc_error_flag_test ())
2435 || gfc_matching_function)
2439 m = MATCH_YES; /* No kind specifier found. */
2445 /* Match an IMPLICIT NONE statement. Actually, this statement is
2446 already matched in parse.c, or we would not end up here in the
2447 first place. So the only thing we need to check, is if there is
2448 trailing garbage. If not, the match is successful. */
2451 gfc_match_implicit_none (void)
2453 return (gfc_match_eos () == MATCH_YES) ? MATCH_YES : MATCH_NO;
2457 /* Match the letter range(s) of an IMPLICIT statement. */
2460 match_implicit_range (void)
2466 cur_loc = gfc_current_locus;
2468 gfc_gobble_whitespace ();
2469 c = gfc_next_ascii_char ();
2472 gfc_error ("Missing character range in IMPLICIT at %C");
2479 gfc_gobble_whitespace ();
2480 c1 = gfc_next_ascii_char ();
2484 gfc_gobble_whitespace ();
2485 c = gfc_next_ascii_char ();
2490 inner = 0; /* Fall through. */
2497 gfc_gobble_whitespace ();
2498 c2 = gfc_next_ascii_char ();
2502 gfc_gobble_whitespace ();
2503 c = gfc_next_ascii_char ();
2505 if ((c != ',') && (c != ')'))
2518 gfc_error ("Letters must be in alphabetic order in "
2519 "IMPLICIT statement at %C");
2523 /* See if we can add the newly matched range to the pending
2524 implicits from this IMPLICIT statement. We do not check for
2525 conflicts with whatever earlier IMPLICIT statements may have
2526 set. This is done when we've successfully finished matching
2528 if (gfc_add_new_implicit_range (c1, c2) != SUCCESS)
2535 gfc_syntax_error (ST_IMPLICIT);
2537 gfc_current_locus = cur_loc;
2542 /* Match an IMPLICIT statement, storing the types for
2543 gfc_set_implicit() if the statement is accepted by the parser.
2544 There is a strange looking, but legal syntactic construction
2545 possible. It looks like:
2547 IMPLICIT INTEGER (a-b) (c-d)
2549 This is legal if "a-b" is a constant expression that happens to
2550 equal one of the legal kinds for integers. The real problem
2551 happens with an implicit specification that looks like:
2553 IMPLICIT INTEGER (a-b)
2555 In this case, a typespec matcher that is "greedy" (as most of the
2556 matchers are) gobbles the character range as a kindspec, leaving
2557 nothing left. We therefore have to go a bit more slowly in the
2558 matching process by inhibiting the kindspec checking during
2559 typespec matching and checking for a kind later. */
2562 gfc_match_implicit (void)
2571 /* We don't allow empty implicit statements. */
2572 if (gfc_match_eos () == MATCH_YES)
2574 gfc_error ("Empty IMPLICIT statement at %C");
2580 /* First cleanup. */
2581 gfc_clear_new_implicit ();
2583 /* A basic type is mandatory here. */
2584 m = gfc_match_type_spec (&ts, 1);
2585 if (m == MATCH_ERROR)
2590 cur_loc = gfc_current_locus;
2591 m = match_implicit_range ();
2595 /* We may have <TYPE> (<RANGE>). */
2596 gfc_gobble_whitespace ();
2597 c = gfc_next_ascii_char ();
2598 if ((c == '\n') || (c == ','))
2600 /* Check for CHARACTER with no length parameter. */
2601 if (ts.type == BT_CHARACTER && !ts.cl)
2603 ts.kind = gfc_default_character_kind;
2604 ts.cl = gfc_new_charlen (gfc_current_ns);
2605 ts.cl->length = gfc_int_expr (1);
2608 /* Record the Successful match. */
2609 if (gfc_merge_new_implicit (&ts) != SUCCESS)
2614 gfc_current_locus = cur_loc;
2617 /* Discard the (incorrectly) matched range. */
2618 gfc_clear_new_implicit ();
2620 /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */
2621 if (ts.type == BT_CHARACTER)
2622 m = match_char_spec (&ts);
2625 m = gfc_match_kind_spec (&ts, false);
2628 m = gfc_match_old_kind_spec (&ts);
2629 if (m == MATCH_ERROR)
2635 if (m == MATCH_ERROR)
2638 m = match_implicit_range ();
2639 if (m == MATCH_ERROR)
2644 gfc_gobble_whitespace ();
2645 c = gfc_next_ascii_char ();
2646 if ((c != '\n') && (c != ','))
2649 if (gfc_merge_new_implicit (&ts) != SUCCESS)
2657 gfc_syntax_error (ST_IMPLICIT);
2665 gfc_match_import (void)
2667 char name[GFC_MAX_SYMBOL_LEN + 1];
2672 if (gfc_current_ns->proc_name == NULL
2673 || gfc_current_ns->proc_name->attr.if_source != IFSRC_IFBODY)
2675 gfc_error ("IMPORT statement at %C only permitted in "
2676 "an INTERFACE body");
2680 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IMPORT statement at %C")
2684 if (gfc_match_eos () == MATCH_YES)
2686 /* All host variables should be imported. */
2687 gfc_current_ns->has_import_set = 1;
2691 if (gfc_match (" ::") == MATCH_YES)
2693 if (gfc_match_eos () == MATCH_YES)
2695 gfc_error ("Expecting list of named entities at %C");
2702 m = gfc_match (" %n", name);
2706 if (gfc_current_ns->parent != NULL
2707 && gfc_find_symbol (name, gfc_current_ns->parent, 1, &sym))
2709 gfc_error ("Type name '%s' at %C is ambiguous", name);
2712 else if (gfc_current_ns->proc_name->ns->parent != NULL
2713 && gfc_find_symbol (name,
2714 gfc_current_ns->proc_name->ns->parent,
2717 gfc_error ("Type name '%s' at %C is ambiguous", name);
2723 gfc_error ("Cannot IMPORT '%s' from host scoping unit "
2724 "at %C - does not exist.", name);
2728 if (gfc_find_symtree (gfc_current_ns->sym_root,name))
2730 gfc_warning ("'%s' is already IMPORTed from host scoping unit "
2735 st = gfc_new_symtree (&gfc_current_ns->sym_root, sym->name);
2738 sym->attr.imported = 1;
2750 if (gfc_match_eos () == MATCH_YES)
2752 if (gfc_match_char (',') != MATCH_YES)
2759 gfc_error ("Syntax error in IMPORT statement at %C");
2764 /* A minimal implementation of gfc_match without whitespace, escape
2765 characters or variable arguments. Returns true if the next
2766 characters match the TARGET template exactly. */
2769 match_string_p (const char *target)
2773 for (p = target; *p; p++)
2774 if ((char) gfc_next_ascii_char () != *p)
2779 /* Matches an attribute specification including array specs. If
2780 successful, leaves the variables current_attr and current_as
2781 holding the specification. Also sets the colon_seen variable for
2782 later use by matchers associated with initializations.
2784 This subroutine is a little tricky in the sense that we don't know
2785 if we really have an attr-spec until we hit the double colon.
2786 Until that time, we can only return MATCH_NO. This forces us to
2787 check for duplicate specification at this level. */
2790 match_attr_spec (void)
2792 /* Modifiers that can exist in a type statement. */
2794 { GFC_DECL_BEGIN = 0,
2795 DECL_ALLOCATABLE = GFC_DECL_BEGIN, DECL_DIMENSION, DECL_EXTERNAL,
2796 DECL_IN, DECL_OUT, DECL_INOUT, DECL_INTRINSIC, DECL_OPTIONAL,
2797 DECL_PARAMETER, DECL_POINTER, DECL_PROTECTED, DECL_PRIVATE,
2798 DECL_PUBLIC, DECL_SAVE, DECL_TARGET, DECL_VALUE, DECL_VOLATILE,
2799 DECL_IS_BIND_C, DECL_NONE,
2800 GFC_DECL_END /* Sentinel */
2804 /* GFC_DECL_END is the sentinel, index starts at 0. */
2805 #define NUM_DECL GFC_DECL_END
2807 locus start, seen_at[NUM_DECL];
2814 gfc_clear_attr (¤t_attr);
2815 start = gfc_current_locus;
2820 /* See if we get all of the keywords up to the final double colon. */
2821 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
2829 gfc_gobble_whitespace ();
2831 ch = gfc_next_ascii_char ();
2834 /* This is the successful exit condition for the loop. */
2835 if (gfc_next_ascii_char () == ':')
2840 gfc_gobble_whitespace ();
2841 switch (gfc_peek_ascii_char ())
2844 if (match_string_p ("allocatable"))
2845 d = DECL_ALLOCATABLE;
2849 /* Try and match the bind(c). */
2850 m = gfc_match_bind_c (NULL, true);
2853 else if (m == MATCH_ERROR)
2858 if (match_string_p ("dimension"))
2863 if (match_string_p ("external"))
2868 if (match_string_p ("int"))
2870 ch = gfc_next_ascii_char ();
2873 if (match_string_p ("nt"))
2875 /* Matched "intent". */
2876 /* TODO: Call match_intent_spec from here. */
2877 if (gfc_match (" ( in out )") == MATCH_YES)
2879 else if (gfc_match (" ( in )") == MATCH_YES)
2881 else if (gfc_match (" ( out )") == MATCH_YES)
2887 if (match_string_p ("insic"))
2889 /* Matched "intrinsic". */
2897 if (match_string_p ("optional"))
2902 gfc_next_ascii_char ();
2903 switch (gfc_next_ascii_char ())
2906 if (match_string_p ("rameter"))
2908 /* Matched "parameter". */
2914 if (match_string_p ("inter"))
2916 /* Matched "pointer". */
2922 ch = gfc_next_ascii_char ();
2925 if (match_string_p ("vate"))
2927 /* Matched "private". */
2933 if (match_string_p ("tected"))
2935 /* Matched "protected". */
2942 if (match_string_p ("blic"))
2944 /* Matched "public". */
2952 if (match_string_p ("save"))
2957 if (match_string_p ("target"))
2962 gfc_next_ascii_char ();
2963 ch = gfc_next_ascii_char ();
2966 if (match_string_p ("lue"))
2968 /* Matched "value". */
2974 if (match_string_p ("latile"))
2976 /* Matched "volatile". */
2984 /* No double colon and no recognizable decl_type, so assume that
2985 we've been looking at something else the whole time. */
2992 /* Check to make sure any parens are paired up correctly. */
2993 if (gfc_match_parens () == MATCH_ERROR)
3000 seen_at[d] = gfc_current_locus;
3002 if (d == DECL_DIMENSION)
3004 m = gfc_match_array_spec (¤t_as);
3008 gfc_error ("Missing dimension specification at %C");
3012 if (m == MATCH_ERROR)
3017 /* Since we've seen a double colon, we have to be looking at an
3018 attr-spec. This means that we can now issue errors. */
3019 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
3024 case DECL_ALLOCATABLE:
3025 attr = "ALLOCATABLE";
3027 case DECL_DIMENSION:
3034 attr = "INTENT (IN)";
3037 attr = "INTENT (OUT)";
3040 attr = "INTENT (IN OUT)";
3042 case DECL_INTRINSIC:
3048 case DECL_PARAMETER:
3054 case DECL_PROTECTED:
3069 case DECL_IS_BIND_C:
3079 attr = NULL; /* This shouldn't happen. */
3082 gfc_error ("Duplicate %s attribute at %L", attr, &seen_at[d]);
3087 /* Now that we've dealt with duplicate attributes, add the attributes
3088 to the current attribute. */
3089 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
3094 if (gfc_current_state () == COMP_DERIVED
3095 && d != DECL_DIMENSION && d != DECL_POINTER
3096 && d != DECL_PRIVATE && d != DECL_PUBLIC
3099 if (d == DECL_ALLOCATABLE)
3101 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ALLOCATABLE "
3102 "attribute at %C in a TYPE definition")
3111 gfc_error ("Attribute at %L is not allowed in a TYPE definition",
3118 if ((d == DECL_PRIVATE || d == DECL_PUBLIC)
3119 && gfc_current_state () != COMP_MODULE)
3121 if (d == DECL_PRIVATE)
3125 if (gfc_current_state () == COMP_DERIVED
3126 && gfc_state_stack->previous
3127 && gfc_state_stack->previous->state == COMP_MODULE)
3129 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Attribute %s "
3130 "at %L in a TYPE definition", attr,
3140 gfc_error ("%s attribute at %L is not allowed outside of the "
3141 "specification part of a module", attr, &seen_at[d]);
3149 case DECL_ALLOCATABLE:
3150 t = gfc_add_allocatable (¤t_attr, &seen_at[d]);
3153 case DECL_DIMENSION:
3154 t = gfc_add_dimension (¤t_attr, NULL, &seen_at[d]);
3158 t = gfc_add_external (¤t_attr, &seen_at[d]);
3162 t = gfc_add_intent (¤t_attr, INTENT_IN, &seen_at[d]);
3166 t = gfc_add_intent (¤t_attr, INTENT_OUT, &seen_at[d]);
3170 t = gfc_add_intent (¤t_attr, INTENT_INOUT, &seen_at[d]);
3173 case DECL_INTRINSIC:
3174 t = gfc_add_intrinsic (¤t_attr, &seen_at[d]);
3178 t = gfc_add_optional (¤t_attr, &seen_at[d]);
3181 case DECL_PARAMETER:
3182 t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, &seen_at[d]);
3186 t = gfc_add_pointer (¤t_attr, &seen_at[d]);
3189 case DECL_PROTECTED:
3190 if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE)
3192 gfc_error ("PROTECTED at %C only allowed in specification "
3193 "part of a module");
3198 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED "
3203 t = gfc_add_protected (¤t_attr, NULL, &seen_at[d]);
3207 t = gfc_add_access (¤t_attr, ACCESS_PRIVATE, NULL,
3212 t = gfc_add_access (¤t_attr, ACCESS_PUBLIC, NULL,
3217 t = gfc_add_save (¤t_attr, NULL, &seen_at[d]);
3221 t = gfc_add_target (¤t_attr, &seen_at[d]);
3224 case DECL_IS_BIND_C:
3225 t = gfc_add_is_bind_c(¤t_attr, NULL, &seen_at[d], 0);
3229 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE attribute "
3234 t = gfc_add_value (¤t_attr, NULL, &seen_at[d]);
3238 if (gfc_notify_std (GFC_STD_F2003,
3239 "Fortran 2003: VOLATILE attribute at %C")
3243 t = gfc_add_volatile (¤t_attr, NULL, &seen_at[d]);
3247 gfc_internal_error ("match_attr_spec(): Bad attribute");
3261 gfc_current_locus = start;
3262 gfc_free_array_spec (current_as);
3268 /* Set the binding label, dest_label, either with the binding label
3269 stored in the given gfc_typespec, ts, or if none was provided, it
3270 will be the symbol name in all lower case, as required by the draft
3271 (J3/04-007, section 15.4.1). If a binding label was given and
3272 there is more than one argument (num_idents), it is an error. */
3275 set_binding_label (char *dest_label, const char *sym_name, int num_idents)
3277 if (num_idents > 1 && has_name_equals)
3279 gfc_error ("Multiple identifiers provided with "
3280 "single NAME= specifier at %C");
3284 if (curr_binding_label[0] != '\0')
3286 /* Binding label given; store in temp holder til have sym. */
3287 strcpy (dest_label, curr_binding_label);
3291 /* No binding label given, and the NAME= specifier did not exist,
3292 which means there was no NAME="". */
3293 if (sym_name != NULL && has_name_equals == 0)
3294 strcpy (dest_label, sym_name);
3301 /* Set the status of the given common block as being BIND(C) or not,
3302 depending on the given parameter, is_bind_c. */
3305 set_com_block_bind_c (gfc_common_head *com_block, int is_bind_c)
3307 com_block->is_bind_c = is_bind_c;
3312 /* Verify that the given gfc_typespec is for a C interoperable type. */
3315 verify_c_interop (gfc_typespec *ts)
3317 if (ts->type == BT_DERIVED && ts->derived != NULL)
3318 return (ts->derived->ts.is_c_interop ? SUCCESS : FAILURE);
3319 else if (ts->is_c_interop != 1)
3326 /* Verify that the variables of a given common block, which has been
3327 defined with the attribute specifier bind(c), to be of a C
3328 interoperable type. Errors will be reported here, if
3332 verify_com_block_vars_c_interop (gfc_common_head *com_block)
3334 gfc_symbol *curr_sym = NULL;
3335 gfc_try retval = SUCCESS;
3337 curr_sym = com_block->head;
3339 /* Make sure we have at least one symbol. */
3340 if (curr_sym == NULL)
3343 /* Here we know we have a symbol, so we'll execute this loop
3347 /* The second to last param, 1, says this is in a common block. */
3348 retval = verify_bind_c_sym (curr_sym, &(curr_sym->ts), 1, com_block);
3349 curr_sym = curr_sym->common_next;
3350 } while (curr_sym != NULL);
3356 /* Verify that a given BIND(C) symbol is C interoperable. If it is not,
3357 an appropriate error message is reported. */
3360 verify_bind_c_sym (gfc_symbol *tmp_sym, gfc_typespec *ts,
3361 int is_in_common, gfc_common_head *com_block)
3363 bool bind_c_function = false;
3364 gfc_try retval = SUCCESS;
3366 if (tmp_sym->attr.function && tmp_sym->attr.is_bind_c)
3367 bind_c_function = true;
3369 if (tmp_sym->attr.function && tmp_sym->result != NULL)
3371 tmp_sym = tmp_sym->result;
3372 /* Make sure it wasn't an implicitly typed result. */
3373 if (tmp_sym->attr.implicit_type)
3375 gfc_warning ("Implicitly declared BIND(C) function '%s' at "
3376 "%L may not be C interoperable", tmp_sym->name,
3377 &tmp_sym->declared_at);
3378 tmp_sym->ts.f90_type = tmp_sym->ts.type;
3379 /* Mark it as C interoperable to prevent duplicate warnings. */
3380 tmp_sym->ts.is_c_interop = 1;
3381 tmp_sym->attr.is_c_interop = 1;
3385 /* Here, we know we have the bind(c) attribute, so if we have
3386 enough type info, then verify that it's a C interop kind.
3387 The info could be in the symbol already, or possibly still in
3388 the given ts (current_ts), so look in both. */
3389 if (tmp_sym->ts.type != BT_UNKNOWN || ts->type != BT_UNKNOWN)
3391 if (verify_c_interop (&(tmp_sym->ts)) != SUCCESS)
3393 /* See if we're dealing with a sym in a common block or not. */
3394 if (is_in_common == 1)
3396 gfc_warning ("Variable '%s' in common block '%s' at %L "
3397 "may not be a C interoperable "
3398 "kind though common block '%s' is BIND(C)",
3399 tmp_sym->name, com_block->name,
3400 &(tmp_sym->declared_at), com_block->name);
3404 if (tmp_sym->ts.type == BT_DERIVED || ts->type == BT_DERIVED)
3405 gfc_error ("Type declaration '%s' at %L is not C "
3406 "interoperable but it is BIND(C)",
3407 tmp_sym->name, &(tmp_sym->declared_at));
3409 gfc_warning ("Variable '%s' at %L "
3410 "may not be a C interoperable "
3411 "kind but it is bind(c)",
3412 tmp_sym->name, &(tmp_sym->declared_at));
3416 /* Variables declared w/in a common block can't be bind(c)
3417 since there's no way for C to see these variables, so there's
3418 semantically no reason for the attribute. */
3419 if (is_in_common == 1 && tmp_sym->attr.is_bind_c == 1)
3421 gfc_error ("Variable '%s' in common block '%s' at "
3422 "%L cannot be declared with BIND(C) "
3423 "since it is not a global",
3424 tmp_sym->name, com_block->name,
3425 &(tmp_sym->declared_at));
3429 /* Scalar variables that are bind(c) can not have the pointer
3430 or allocatable attributes. */
3431 if (tmp_sym->attr.is_bind_c == 1)
3433 if (tmp_sym->attr.pointer == 1)
3435 gfc_error ("Variable '%s' at %L cannot have both the "
3436 "POINTER and BIND(C) attributes",
3437 tmp_sym->name, &(tmp_sym->declared_at));
3441 if (tmp_sym->attr.allocatable == 1)
3443 gfc_error ("Variable '%s' at %L cannot have both the "
3444 "ALLOCATABLE and BIND(C) attributes",
3445 tmp_sym->name, &(tmp_sym->declared_at));
3451 /* If it is a BIND(C) function, make sure the return value is a
3452 scalar value. The previous tests in this function made sure
3453 the type is interoperable. */
3454 if (bind_c_function && tmp_sym->as != NULL)
3455 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3456 "be an array", tmp_sym->name, &(tmp_sym->declared_at));
3458 /* BIND(C) functions can not return a character string. */
3459 if (bind_c_function && tmp_sym->ts.type == BT_CHARACTER)
3460 if (tmp_sym->ts.cl == NULL || tmp_sym->ts.cl->length == NULL
3461 || tmp_sym->ts.cl->length->expr_type != EXPR_CONSTANT
3462 || mpz_cmp_si (tmp_sym->ts.cl->length->value.integer, 1) != 0)
3463 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3464 "be a character string", tmp_sym->name,
3465 &(tmp_sym->declared_at));
3468 /* See if the symbol has been marked as private. If it has, make sure
3469 there is no binding label and warn the user if there is one. */
3470 if (tmp_sym->attr.access == ACCESS_PRIVATE
3471 && tmp_sym->binding_label[0] != '\0')
3472 /* Use gfc_warning_now because we won't say that the symbol fails
3473 just because of this. */
3474 gfc_warning_now ("Symbol '%s' at %L is marked PRIVATE but has been "
3475 "given the binding label '%s'", tmp_sym->name,
3476 &(tmp_sym->declared_at), tmp_sym->binding_label);
3482 /* Set the appropriate fields for a symbol that's been declared as
3483 BIND(C) (the is_bind_c flag and the binding label), and verify that
3484 the type is C interoperable. Errors are reported by the functions
3485 used to set/test these fields. */
3488 set_verify_bind_c_sym (gfc_symbol *tmp_sym, int num_idents)
3490 gfc_try retval = SUCCESS;
3492 /* TODO: Do we need to make sure the vars aren't marked private? */
3494 /* Set the is_bind_c bit in symbol_attribute. */
3495 gfc_add_is_bind_c (&(tmp_sym->attr), tmp_sym->name, &gfc_current_locus, 0);
3497 if (set_binding_label (tmp_sym->binding_label, tmp_sym->name,
3498 num_idents) != SUCCESS)
3505 /* Set the fields marking the given common block as BIND(C), including
3506 a binding label, and report any errors encountered. */
3509 set_verify_bind_c_com_block (gfc_common_head *com_block, int num_idents)
3511 gfc_try retval = SUCCESS;
3513 /* destLabel, common name, typespec (which may have binding label). */
3514 if (set_binding_label (com_block->binding_label, com_block->name, num_idents)
3518 /* Set the given common block (com_block) to being bind(c) (1). */
3519 set_com_block_bind_c (com_block, 1);
3525 /* Retrieve the list of one or more identifiers that the given bind(c)
3526 attribute applies to. */
3529 get_bind_c_idents (void)
3531 char name[GFC_MAX_SYMBOL_LEN + 1];
3533 gfc_symbol *tmp_sym = NULL;
3535 gfc_common_head *com_block = NULL;
3537 if (gfc_match_name (name) == MATCH_YES)
3539 found_id = MATCH_YES;
3540 gfc_get_ha_symbol (name, &tmp_sym);
3542 else if (match_common_name (name) == MATCH_YES)
3544 found_id = MATCH_YES;
3545 com_block = gfc_get_common (name, 0);
3549 gfc_error ("Need either entity or common block name for "
3550 "attribute specification statement at %C");
3554 /* Save the current identifier and look for more. */
3557 /* Increment the number of identifiers found for this spec stmt. */
3560 /* Make sure we have a sym or com block, and verify that it can
3561 be bind(c). Set the appropriate field(s) and look for more
3563 if (tmp_sym != NULL || com_block != NULL)
3565 if (tmp_sym != NULL)
3567 if (set_verify_bind_c_sym (tmp_sym, num_idents)
3573 if (set_verify_bind_c_com_block(com_block, num_idents)
3578 /* Look to see if we have another identifier. */
3580 if (gfc_match_eos () == MATCH_YES)
3581 found_id = MATCH_NO;
3582 else if (gfc_match_char (',') != MATCH_YES)
3583 found_id = MATCH_NO;
3584 else if (gfc_match_name (name) == MATCH_YES)
3586 found_id = MATCH_YES;
3587 gfc_get_ha_symbol (name, &tmp_sym);
3589 else if (match_common_name (name) == MATCH_YES)
3591 found_id = MATCH_YES;
3592 com_block = gfc_get_common (name, 0);
3596 gfc_error ("Missing entity or common block name for "
3597 "attribute specification statement at %C");
3603 gfc_internal_error ("Missing symbol");
3605 } while (found_id == MATCH_YES);
3607 /* if we get here we were successful */
3612 /* Try and match a BIND(C) attribute specification statement. */
3615 gfc_match_bind_c_stmt (void)
3617 match found_match = MATCH_NO;
3622 /* This may not be necessary. */
3624 /* Clear the temporary binding label holder. */
3625 curr_binding_label[0] = '\0';
3627 /* Look for the bind(c). */
3628 found_match = gfc_match_bind_c (NULL, true);
3630 if (found_match == MATCH_YES)
3632 /* Look for the :: now, but it is not required. */
3635 /* Get the identifier(s) that needs to be updated. This may need to
3636 change to hand the flag(s) for the attr specified so all identifiers
3637 found can have all appropriate parts updated (assuming that the same
3638 spec stmt can have multiple attrs, such as both bind(c) and
3640 if (get_bind_c_idents () != SUCCESS)
3641 /* Error message should have printed already. */
3649 /* Match a data declaration statement. */
3652 gfc_match_data_decl (void)
3658 num_idents_on_line = 0;
3660 m = gfc_match_type_spec (¤t_ts, 0);
3664 if (current_ts.type == BT_DERIVED && gfc_current_state () != COMP_DERIVED)
3666 sym = gfc_use_derived (current_ts.derived);
3674 current_ts.derived = sym;
3677 m = match_attr_spec ();
3678 if (m == MATCH_ERROR)
3684 if (current_ts.type == BT_DERIVED && current_ts.derived->components == NULL
3685 && !current_ts.derived->attr.zero_comp)
3688 if (current_attr.pointer && gfc_current_state () == COMP_DERIVED)
3691 gfc_find_symbol (current_ts.derived->name,
3692 current_ts.derived->ns->parent, 1, &sym);
3694 /* Any symbol that we find had better be a type definition
3695 which has its components defined. */
3696 if (sym != NULL && sym->attr.flavor == FL_DERIVED
3697 && (current_ts.derived->components != NULL
3698 || current_ts.derived->attr.zero_comp))
3701 /* Now we have an error, which we signal, and then fix up
3702 because the knock-on is plain and simple confusing. */
3703 gfc_error_now ("Derived type at %C has not been previously defined "
3704 "and so cannot appear in a derived type definition");
3705 current_attr.pointer = 1;
3710 /* If we have an old-style character declaration, and no new-style
3711 attribute specifications, then there a comma is optional between
3712 the type specification and the variable list. */
3713 if (m == MATCH_NO && current_ts.type == BT_CHARACTER && old_char_selector)
3714 gfc_match_char (',');
3716 /* Give the types/attributes to symbols that follow. Give the element
3717 a number so that repeat character length expressions can be copied. */
3721 num_idents_on_line++;
3722 m = variable_decl (elem++);
3723 if (m == MATCH_ERROR)
3728 if (gfc_match_eos () == MATCH_YES)
3730 if (gfc_match_char (',') != MATCH_YES)
3734 if (gfc_error_flag_test () == 0)
3735 gfc_error ("Syntax error in data declaration at %C");
3738 gfc_free_data_all (gfc_current_ns);
3741 gfc_free_array_spec (current_as);
3747 /* Match a prefix associated with a function or subroutine
3748 declaration. If the typespec pointer is nonnull, then a typespec
3749 can be matched. Note that if nothing matches, MATCH_YES is
3750 returned (the null string was matched). */
3753 gfc_match_prefix (gfc_typespec *ts)
3757 gfc_clear_attr (¤t_attr);
3760 gcc_assert (!gfc_matching_prefix);
3761 gfc_matching_prefix = true;
3764 if (!seen_type && ts != NULL
3765 && gfc_match_type_spec (ts, 0) == MATCH_YES
3766 && gfc_match_space () == MATCH_YES)
3773 if (gfc_match ("elemental% ") == MATCH_YES)
3775 if (gfc_add_elemental (¤t_attr, NULL) == FAILURE)
3781 if (gfc_match ("pure% ") == MATCH_YES)
3783 if (gfc_add_pure (¤t_attr, NULL) == FAILURE)
3789 if (gfc_match ("recursive% ") == MATCH_YES)
3791 if (gfc_add_recursive (¤t_attr, NULL) == FAILURE)
3797 /* At this point, the next item is not a prefix. */
3798 gcc_assert (gfc_matching_prefix);
3799 gfc_matching_prefix = false;
3803 gcc_assert (gfc_matching_prefix);
3804 gfc_matching_prefix = false;
3809 /* Copy attributes matched by gfc_match_prefix() to attributes on a symbol. */
3812 copy_prefix (symbol_attribute *dest, locus *where)
3814 if (current_attr.pure && gfc_add_pure (dest, where) == FAILURE)
3817 if (current_attr.elemental && gfc_add_elemental (dest, where) == FAILURE)
3820 if (current_attr.recursive && gfc_add_recursive (dest, where) == FAILURE)
3827 /* Match a formal argument list. */
3830 gfc_match_formal_arglist (gfc_symbol *progname, int st_flag, int null_flag)
3832 gfc_formal_arglist *head, *tail, *p, *q;
3833 char name[GFC_MAX_SYMBOL_LEN + 1];
3839 if (gfc_match_char ('(') != MATCH_YES)
3846 if (gfc_match_char (')') == MATCH_YES)
3851 if (gfc_match_char ('*') == MATCH_YES)
3855 m = gfc_match_name (name);
3859 if (gfc_get_symbol (name, NULL, &sym))
3863 p = gfc_get_formal_arglist ();
3875 /* We don't add the VARIABLE flavor because the name could be a
3876 dummy procedure. We don't apply these attributes to formal
3877 arguments of statement functions. */
3878 if (sym != NULL && !st_flag
3879 && (gfc_add_dummy (&sym->attr, sym->name, NULL) == FAILURE
3880 || gfc_missing_attr (&sym->attr, NULL) == FAILURE))
3886 /* The name of a program unit can be in a different namespace,
3887 so check for it explicitly. After the statement is accepted,
3888 the name is checked for especially in gfc_get_symbol(). */
3889 if (gfc_new_block != NULL && sym != NULL
3890 && strcmp (sym->name, gfc_new_block->name) == 0)
3892 gfc_error ("Name '%s' at %C is the name of the procedure",
3898 if (gfc_match_char (')') == MATCH_YES)
3901 m = gfc_match_char (',');
3904 gfc_error ("Unexpected junk in formal argument list at %C");
3910 /* Check for duplicate symbols in the formal argument list. */
3913 for (p = head; p->next; p = p->next)
3918 for (q = p->next; q; q = q->next)
3919 if (p->sym == q->sym)
3921 gfc_error ("Duplicate symbol '%s' in formal argument list "
3922 "at %C", p->sym->name);
3930 if (gfc_add_explicit_interface (progname, IFSRC_DECL, head, NULL)
3940 gfc_free_formal_arglist (head);
3945 /* Match a RESULT specification following a function declaration or
3946 ENTRY statement. Also matches the end-of-statement. */
3949 match_result (gfc_symbol *function, gfc_symbol **result)
3951 char name[GFC_MAX_SYMBOL_LEN + 1];
3955 if (gfc_match (" result (") != MATCH_YES)
3958 m = gfc_match_name (name);
3962 /* Get the right paren, and that's it because there could be the
3963 bind(c) attribute after the result clause. */
3964 if (gfc_match_char(')') != MATCH_YES)
3966 /* TODO: should report the missing right paren here. */
3970 if (strcmp (function->name, name) == 0)
3972 gfc_error ("RESULT variable at %C must be different than function name");
3976 if (gfc_get_symbol (name, NULL, &r))
3979 if (gfc_add_result (&r->attr, r->name, NULL) == FAILURE)
3988 /* Match a function suffix, which could be a combination of a result
3989 clause and BIND(C), either one, or neither. The draft does not
3990 require them to come in a specific order. */
3993 gfc_match_suffix (gfc_symbol *sym, gfc_symbol **result)
3995 match is_bind_c; /* Found bind(c). */
3996 match is_result; /* Found result clause. */
3997 match found_match; /* Status of whether we've found a good match. */
3998 char peek_char; /* Character we're going to peek at. */
3999 bool allow_binding_name;
4001 /* Initialize to having found nothing. */
4002 found_match = MATCH_NO;
4003 is_bind_c = MATCH_NO;
4004 is_result = MATCH_NO;
4006 /* Get the next char to narrow between result and bind(c). */
4007 gfc_gobble_whitespace ();
4008 peek_char = gfc_peek_ascii_char ();
4010 /* C binding names are not allowed for internal procedures. */
4011 if (gfc_current_state () == COMP_CONTAINS
4012 && sym->ns->proc_name->attr.flavor != FL_MODULE)
4013 allow_binding_name = false;
4015 allow_binding_name = true;
4020 /* Look for result clause. */
4021 is_result = match_result (sym, result);
4022 if (is_result == MATCH_YES)
4024 /* Now see if there is a bind(c) after it. */
4025 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
4026 /* We've found the result clause and possibly bind(c). */
4027 found_match = MATCH_YES;
4030 /* This should only be MATCH_ERROR. */
4031 found_match = is_result;
4034 /* Look for bind(c) first. */
4035 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
4036 if (is_bind_c == MATCH_YES)
4038 /* Now see if a result clause followed it. */
4039 is_result = match_result (sym, result);
4040 found_match = MATCH_YES;
4044 /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */
4045 found_match = MATCH_ERROR;
4049 gfc_error ("Unexpected junk after function declaration at %C");
4050 found_match = MATCH_ERROR;
4054 if (is_bind_c == MATCH_YES)
4056 /* Fortran 2008 draft allows BIND(C) for internal procedures. */
4057 if (gfc_current_state () == COMP_CONTAINS
4058 && sym->ns->proc_name->attr.flavor != FL_MODULE
4059 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute "
4060 "at %L may not be specified for an internal "
4061 "procedure", &gfc_current_locus)
4065 if (gfc_add_is_bind_c (&(sym->attr), sym->name, &gfc_current_locus, 1)
4074 /* Procedure pointer return value without RESULT statement:
4075 Add "hidden" result variable named "ppr@". */
4078 add_hidden_procptr_result (gfc_symbol *sym)
4082 if (gfc_notification_std (GFC_STD_F2003) == ERROR)
4085 /* First usage case: PROCEDURE and EXTERNAL statements. */
4086 case1 = gfc_current_state () == COMP_FUNCTION && gfc_current_block ()
4087 && strcmp (gfc_current_block ()->name, sym->name) == 0
4088 && sym->attr.external;
4089 /* Second usage case: INTERFACE statements. */
4090 case2 = gfc_current_state () == COMP_INTERFACE && gfc_state_stack->previous
4091 && gfc_state_stack->previous->state == COMP_FUNCTION
4092 && strcmp (gfc_state_stack->previous->sym->name, sym->name) == 0;
4098 gfc_get_sym_tree ("ppr@", gfc_current_ns, &stree, false);
4102 gfc_get_sym_tree ("ppr@", gfc_current_ns->parent, &stree, false);
4103 st2 = gfc_new_symtree (&gfc_current_ns->sym_root, "ppr@");
4104 st2->n.sym = stree->n.sym;
4106 sym->result = stree->n.sym;
4108 sym->result->attr.proc_pointer = sym->attr.proc_pointer;
4109 sym->result->attr.pointer = sym->attr.pointer;
4110 sym->result->attr.external = sym->attr.external;
4111 sym->result->attr.referenced = sym->attr.referenced;
4112 sym->result->ts = sym->ts;
4113 sym->attr.proc_pointer = 0;
4114 sym->attr.pointer = 0;
4115 sym->attr.external = 0;
4116 if (sym->result->attr.external && sym->result->attr.pointer)
4118 sym->result->attr.pointer = 0;
4119 sym->result->attr.proc_pointer = 1;
4122 return gfc_add_result (&sym->result->attr, sym->result->name, NULL);
4124 /* POINTER after PROCEDURE/EXTERNAL/INTERFACE statement. */
4125 else if (sym->attr.function && !sym->attr.external && sym->attr.pointer
4126 && sym->result && sym->result != sym && sym->result->attr.external
4127 && sym == gfc_current_ns->proc_name
4128 && sym == sym->result->ns->proc_name
4129 && strcmp ("ppr@", sym->result->name) == 0)
4131 sym->result->attr.proc_pointer = 1;
4132 sym->attr.pointer = 0;
4140 /* Match the interface for a PROCEDURE declaration,
4141 including brackets (R1212). */
4144 match_procedure_interface (gfc_symbol **proc_if)
4148 locus old_loc, entry_loc;
4149 gfc_namespace *old_ns = gfc_current_ns;
4150 char name[GFC_MAX_SYMBOL_LEN + 1];
4152 old_loc = entry_loc = gfc_current_locus;
4153 gfc_clear_ts (¤t_ts);
4155 if (gfc_match (" (") != MATCH_YES)
4157 gfc_current_locus = entry_loc;
4161 /* Get the type spec. for the procedure interface. */
4162 old_loc = gfc_current_locus;
4163 m = gfc_match_type_spec (¤t_ts, 0);
4164 gfc_gobble_whitespace ();
4165 if (m == MATCH_YES || (m == MATCH_NO && gfc_peek_ascii_char () == ')'))
4168 if (m == MATCH_ERROR)
4171 /* Procedure interface is itself a procedure. */
4172 gfc_current_locus = old_loc;
4173 m = gfc_match_name (name);
4175 /* First look to see if it is already accessible in the current
4176 namespace because it is use associated or contained. */
4178 if (gfc_find_sym_tree (name, NULL, 0, &st))
4181 /* If it is still not found, then try the parent namespace, if it
4182 exists and create the symbol there if it is still not found. */
4183 if (gfc_current_ns->parent)
4184 gfc_current_ns = gfc_current_ns->parent;
4185 if (st == NULL && gfc_get_ha_sym_tree (name, &st))
4188 gfc_current_ns = old_ns;
4189 *proc_if = st->n.sym;
4191 /* Various interface checks. */
4195 /* Resolve interface if possible. That way, attr.procedure is only set
4196 if it is declared by a later procedure-declaration-stmt, which is
4197 invalid per C1212. */
4198 while ((*proc_if)->ts.interface)
4199 *proc_if = (*proc_if)->ts.interface;
4201 if ((*proc_if)->generic)
4203 gfc_error ("Interface '%s' at %C may not be generic",
4207 if ((*proc_if)->attr.proc == PROC_ST_FUNCTION)
4209 gfc_error ("Interface '%s' at %C may not be a statement function",
4213 /* Handle intrinsic procedures. */
4214 if (!((*proc_if)->attr.external || (*proc_if)->attr.use_assoc
4215 || (*proc_if)->attr.if_source == IFSRC_IFBODY)
4216 && (gfc_is_intrinsic ((*proc_if), 0, gfc_current_locus)
4217 || gfc_is_intrinsic ((*proc_if), 1, gfc_current_locus)))
4218 (*proc_if)->attr.intrinsic = 1;
4219 if ((*proc_if)->attr.intrinsic
4220 && !gfc_intrinsic_actual_ok ((*proc_if)->name, 0))
4222 gfc_error ("Intrinsic procedure '%s' not allowed "
4223 "in PROCEDURE statement at %C", (*proc_if)->name);
4229 if (gfc_match (" )") != MATCH_YES)
4231 gfc_current_locus = entry_loc;
4239 /* Match a PROCEDURE declaration (R1211). */
4242 match_procedure_decl (void)
4245 gfc_symbol *sym, *proc_if = NULL;
4247 gfc_expr *initializer = NULL;
4249 /* Parse interface (with brackets). */
4250 m = match_procedure_interface (&proc_if);
4254 /* Parse attributes (with colons). */
4255 m = match_attr_spec();
4256 if (m == MATCH_ERROR)
4259 /* Get procedure symbols. */
4262 m = gfc_match_symbol (&sym, 0);
4265 else if (m == MATCH_ERROR)
4268 /* Add current_attr to the symbol attributes. */
4269 if (gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE)
4272 if (sym->attr.is_bind_c)
4274 /* Check for C1218. */
4275 if (!proc_if || !proc_if->attr.is_bind_c)
4277 gfc_error ("BIND(C) attribute at %C requires "
4278 "an interface with BIND(C)");
4281 /* Check for C1217. */
4282 if (has_name_equals && sym->attr.pointer)
4284 gfc_error ("BIND(C) procedure with NAME may not have "
4285 "POINTER attribute at %C");
4288 if (has_name_equals && sym->attr.dummy)
4290 gfc_error ("Dummy procedure at %C may not have "
4291 "BIND(C) attribute with NAME");
4294 /* Set binding label for BIND(C). */
4295 if (set_binding_label (sym->binding_label, sym->name, num) != SUCCESS)
4299 if (gfc_add_external (&sym->attr, NULL) == FAILURE)
4302 if (add_hidden_procptr_result (sym) == SUCCESS)
4305 if (gfc_add_proc (&sym->attr, sym->name, NULL) == FAILURE)
4308 /* Set interface. */
4309 if (proc_if != NULL)
4311 if (sym->ts.type != BT_UNKNOWN)
4313 gfc_error ("Procedure '%s' at %L already has basic type of %s",
4314 sym->name, &gfc_current_locus,
4315 gfc_basic_typename (sym->ts.type));
4318 sym->ts.interface = proc_if;
4319 sym->attr.untyped = 1;
4320 sym->attr.if_source = IFSRC_IFBODY;
4322 else if (current_ts.type != BT_UNKNOWN)
4324 if (gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE)
4326 sym->ts.interface = gfc_new_symbol ("", gfc_current_ns);
4327 sym->ts.interface->ts = current_ts;
4328 sym->ts.interface->attr.function = 1;
4329 sym->attr.function = sym->ts.interface->attr.function;
4330 sym->attr.if_source = IFSRC_UNKNOWN;
4333 if (gfc_match (" =>") == MATCH_YES)
4335 if (!current_attr.pointer)
4337 gfc_error ("Initialization at %C isn't for a pointer variable");
4342 m = gfc_match_null (&initializer);
4345 gfc_error ("Pointer initialization requires a NULL() at %C");
4349 if (gfc_pure (NULL))
4351 gfc_error ("Initialization of pointer at %C is not allowed in "
4352 "a PURE procedure");
4359 if (add_init_expr_to_sym (sym->name, &initializer, &gfc_current_locus)
4365 gfc_set_sym_referenced (sym);
4367 if (gfc_match_eos () == MATCH_YES)
4369 if (gfc_match_char (',') != MATCH_YES)
4374 gfc_error ("Syntax error in PROCEDURE statement at %C");
4378 /* Free stuff up and return. */
4379 gfc_free_expr (initializer);
4385 match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc);
4388 /* Match a procedure pointer component declaration (R445). */
4391 match_ppc_decl (void)
4394 gfc_symbol *proc_if = NULL;
4398 gfc_expr *initializer = NULL;
4399 gfc_typebound_proc* tb;
4400 char name[GFC_MAX_SYMBOL_LEN + 1];
4402 /* Parse interface (with brackets). */
4403 m = match_procedure_interface (&proc_if);
4407 /* Parse attributes. */
4408 tb = XCNEW (gfc_typebound_proc);
4409 tb->where = gfc_current_locus;
4410 m = match_binding_attributes (tb, false, true);
4411 if (m == MATCH_ERROR)
4414 /* TODO: Implement PASS. */
4417 gfc_error ("Procedure Pointer Component with PASS at %C "
4418 "not yet implemented");
4422 gfc_clear_attr (¤t_attr);
4423 current_attr.procedure = 1;
4424 current_attr.proc_pointer = 1;
4425 current_attr.access = tb->access;
4426 current_attr.flavor = FL_PROCEDURE;
4428 /* Match the colons (required). */
4429 if (gfc_match (" ::") != MATCH_YES)
4431 gfc_error ("Expected '::' after binding-attributes at %C");
4435 /* Check for C450. */
4436 if (!tb->nopass && proc_if == NULL)
4438 gfc_error("NOPASS or explicit interface required at %C");
4442 /* Match PPC names. */
4446 m = gfc_match_name (name);
4449 else if (m == MATCH_ERROR)
4452 if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE)
4455 /* Add current_attr to the symbol attributes. */
4456 if (gfc_copy_attr (&c->attr, ¤t_attr, NULL) == FAILURE)
4459 if (gfc_add_external (&c->attr, NULL) == FAILURE)
4462 if (gfc_add_proc (&c->attr, name, NULL) == FAILURE)
4465 /* Set interface. */
4466 if (proc_if != NULL)
4468 c->ts.interface = proc_if;
4469 c->attr.untyped = 1;
4470 c->attr.if_source = IFSRC_IFBODY;
4472 else if (ts.type != BT_UNKNOWN)
4475 c->ts.interface = gfc_new_symbol ("", gfc_current_ns);
4476 c->ts.interface->ts = ts;
4477 c->ts.interface->attr.function = 1;
4478 c->attr.function = c->ts.interface->attr.function;
4479 c->attr.if_source = IFSRC_UNKNOWN;
4482 if (gfc_match (" =>") == MATCH_YES)
4484 m = gfc_match_null (&initializer);
4487 gfc_error ("Pointer initialization requires a NULL() at %C");
4490 if (gfc_pure (NULL))
4492 gfc_error ("Initialization of pointer at %C is not allowed in "
4493 "a PURE procedure");
4498 gfc_free_expr (initializer);
4501 c->initializer = initializer;
4504 if (gfc_match_eos () == MATCH_YES)
4506 if (gfc_match_char (',') != MATCH_YES)
4511 gfc_error ("Syntax error in procedure pointer component at %C");
4516 /* Match a PROCEDURE declaration inside an interface (R1206). */
4519 match_procedure_in_interface (void)
4523 char name[GFC_MAX_SYMBOL_LEN + 1];
4525 if (current_interface.type == INTERFACE_NAMELESS
4526 || current_interface.type == INTERFACE_ABSTRACT)
4528 gfc_error ("PROCEDURE at %C must be in a generic interface");
4534 m = gfc_match_name (name);
4537 else if (m == MATCH_ERROR)
4539 if (gfc_get_symbol (name, gfc_current_ns->parent, &sym))
4542 if (gfc_add_interface (sym) == FAILURE)
4545 if (gfc_match_eos () == MATCH_YES)
4547 if (gfc_match_char (',') != MATCH_YES)
4554 gfc_error ("Syntax error in PROCEDURE statement at %C");
4559 /* General matcher for PROCEDURE declarations. */
4561 static match match_procedure_in_type (void);
4564 gfc_match_procedure (void)
4568 switch (gfc_current_state ())
4573 case COMP_SUBROUTINE:
4575 m = match_procedure_decl ();
4577 case COMP_INTERFACE:
4578 m = match_procedure_in_interface ();
4581 m = match_ppc_decl ();
4583 case COMP_DERIVED_CONTAINS:
4584 m = match_procedure_in_type ();
4593 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROCEDURE statement at %C")
4601 /* Warn if a matched procedure has the same name as an intrinsic; this is
4602 simply a wrapper around gfc_warn_intrinsic_shadow that interprets the current
4603 parser-state-stack to find out whether we're in a module. */
4606 warn_intrinsic_shadow (const gfc_symbol* sym, bool func)
4610 in_module = (gfc_state_stack->previous
4611 && gfc_state_stack->previous->state == COMP_MODULE);
4613 gfc_warn_intrinsic_shadow (sym, in_module, func);
4617 /* Match a function declaration. */
4620 gfc_match_function_decl (void)
4622 char name[GFC_MAX_SYMBOL_LEN + 1];
4623 gfc_symbol *sym, *result;
4627 match found_match; /* Status returned by match func. */
4629 if (gfc_current_state () != COMP_NONE
4630 && gfc_current_state () != COMP_INTERFACE
4631 && gfc_current_state () != COMP_CONTAINS)
4634 gfc_clear_ts (¤t_ts);
4636 old_loc = gfc_current_locus;
4638 m = gfc_match_prefix (¤t_ts);
4641 gfc_current_locus = old_loc;
4645 if (gfc_match ("function% %n", name) != MATCH_YES)
4647 gfc_current_locus = old_loc;
4650 if (get_proc_name (name, &sym, false))
4653 if (add_hidden_procptr_result (sym) == SUCCESS)
4656 gfc_new_block = sym;
4658 m = gfc_match_formal_arglist (sym, 0, 0);
4661 gfc_error ("Expected formal argument list in function "
4662 "definition at %C");
4666 else if (m == MATCH_ERROR)
4671 /* According to the draft, the bind(c) and result clause can
4672 come in either order after the formal_arg_list (i.e., either
4673 can be first, both can exist together or by themselves or neither
4674 one). Therefore, the match_result can't match the end of the
4675 string, and check for the bind(c) or result clause in either order. */
4676 found_match = gfc_match_eos ();
4678 /* Make sure that it isn't already declared as BIND(C). If it is, it
4679 must have been marked BIND(C) with a BIND(C) attribute and that is
4680 not allowed for procedures. */
4681 if (sym->attr.is_bind_c == 1)
4683 sym->attr.is_bind_c = 0;
4684 if (sym->old_symbol != NULL)
4685 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4686 "variables or common blocks",
4687 &(sym->old_symbol->declared_at));
4689 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4690 "variables or common blocks", &gfc_current_locus);
4693 if (found_match != MATCH_YES)
4695 /* If we haven't found the end-of-statement, look for a suffix. */
4696 suffix_match = gfc_match_suffix (sym, &result);
4697 if (suffix_match == MATCH_YES)
4698 /* Need to get the eos now. */
4699 found_match = gfc_match_eos ();
4701 found_match = suffix_match;
4704 if(found_match != MATCH_YES)
4708 /* Make changes to the symbol. */
4711 if (gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE)
4714 if (gfc_missing_attr (&sym->attr, NULL) == FAILURE
4715 || copy_prefix (&sym->attr, &sym->declared_at) == FAILURE)
4718 /* Delay matching the function characteristics until after the
4719 specification block by signalling kind=-1. */
4720 sym->declared_at = old_loc;
4721 if (current_ts.type != BT_UNKNOWN)
4722 current_ts.kind = -1;
4724 current_ts.kind = 0;
4728 if (current_ts.type != BT_UNKNOWN
4729 && gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE)
4735 if (current_ts.type != BT_UNKNOWN
4736 && gfc_add_type (result, ¤t_ts, &gfc_current_locus)
4739 sym->result = result;
4742 /* Warn if this procedure has the same name as an intrinsic. */
4743 warn_intrinsic_shadow (sym, true);
4749 gfc_current_locus = old_loc;
4754 /* This is mostly a copy of parse.c(add_global_procedure) but modified to
4755 pass the name of the entry, rather than the gfc_current_block name, and
4756 to return false upon finding an existing global entry. */
4759 add_global_entry (const char *name, int sub)
4762 enum gfc_symbol_type type;
4764 s = gfc_get_gsymbol(name);
4765 type = sub ? GSYM_SUBROUTINE : GSYM_FUNCTION;
4768 || (s->type != GSYM_UNKNOWN
4769 && s->type != type))
4770 gfc_global_used(s, NULL);
4774 s->where = gfc_current_locus;
4776 s->ns = gfc_current_ns;
4783 /* Match an ENTRY statement. */
4786 gfc_match_entry (void)
4791 char name[GFC_MAX_SYMBOL_LEN + 1];
4792 gfc_compile_state state;
4796 bool module_procedure;
4800 m = gfc_match_name (name);
4804 state = gfc_current_state ();
4805 if (state != COMP_SUBROUTINE && state != COMP_FUNCTION)
4810 gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM");
4813 gfc_error ("ENTRY statement at %C cannot appear within a MODULE");
4815 case COMP_BLOCK_DATA:
4816 gfc_error ("ENTRY statement at %C cannot appear within "
4819 case COMP_INTERFACE:
4820 gfc_error ("ENTRY statement at %C cannot appear within "
4824 gfc_error ("ENTRY statement at %C cannot appear within "
4825 "a DERIVED TYPE block");
4828 gfc_error ("ENTRY statement at %C cannot appear within "
4829 "an IF-THEN block");
4832 gfc_error ("ENTRY statement at %C cannot appear within "
4836 gfc_error ("ENTRY statement at %C cannot appear within "
4840 gfc_error ("ENTRY statement at %C cannot appear within "
4844 gfc_error ("ENTRY statement at %C cannot appear within "
4848 gfc_error ("ENTRY statement at %C cannot appear within "
4849 "a contained subprogram");
4852 gfc_internal_error ("gfc_match_entry(): Bad state");
4857 module_procedure = gfc_current_ns->parent != NULL
4858 && gfc_current_ns->parent->proc_name
4859 && gfc_current_ns->parent->proc_name->attr.flavor
4862 if (gfc_current_ns->parent != NULL
4863 && gfc_current_ns->parent->proc_name
4864 && !module_procedure)
4866 gfc_error("ENTRY statement at %C cannot appear in a "
4867 "contained procedure");
4871 /* Module function entries need special care in get_proc_name
4872 because previous references within the function will have
4873 created symbols attached to the current namespace. */
4874 if (get_proc_name (name, &entry,
4875 gfc_current_ns->parent != NULL
4876 && module_procedure))
4879 proc = gfc_current_block ();
4881 /* Make sure that it isn't already declared as BIND(C). If it is, it
4882 must have been marked BIND(C) with a BIND(C) attribute and that is
4883 not allowed for procedures. */
4884 if (entry->attr.is_bind_c == 1)
4886 entry->attr.is_bind_c = 0;
4887 if (entry->old_symbol != NULL)
4888 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4889 "variables or common blocks",
4890 &(entry->old_symbol->declared_at));
4892 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4893 "variables or common blocks", &gfc_current_locus);
4896 /* Check what next non-whitespace character is so we can tell if there
4897 is the required parens if we have a BIND(C). */
4898 gfc_gobble_whitespace ();
4899 peek_char = gfc_peek_ascii_char ();
4901 if (state == COMP_SUBROUTINE)
4903 /* An entry in a subroutine. */
4904 if (!gfc_current_ns->parent && !add_global_entry (name, 1))
4907 m = gfc_match_formal_arglist (entry, 0, 1);
4911 /* Call gfc_match_bind_c with allow_binding_name = true as ENTRY can
4912 never be an internal procedure. */
4913 is_bind_c = gfc_match_bind_c (entry, true);
4914 if (is_bind_c == MATCH_ERROR)
4916 if (is_bind_c == MATCH_YES)
4918 if (peek_char != '(')
4920 gfc_error ("Missing required parentheses before BIND(C) at %C");
4923 if (gfc_add_is_bind_c (&(entry->attr), entry->name, &(entry->declared_at), 1)
4928 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
4929 || gfc_add_subroutine (&entry->attr, entry->name, NULL) == FAILURE)
4934 /* An entry in a function.
4935 We need to take special care because writing
4940 ENTRY f() RESULT (r)
4942 ENTRY f RESULT (r). */
4943 if (!gfc_current_ns->parent && !add_global_entry (name, 0))
4946 old_loc = gfc_current_locus;
4947 if (gfc_match_eos () == MATCH_YES)
4949 gfc_current_locus = old_loc;
4950 /* Match the empty argument list, and add the interface to
4952 m = gfc_match_formal_arglist (entry, 0, 1);
4955 m = gfc_match_formal_arglist (entry, 0, 0);
4962 if (gfc_match_eos () == MATCH_YES)
4964 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
4965 || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE)
4968 entry->result = entry;
4972 m = gfc_match_suffix (entry, &result);
4974 gfc_syntax_error (ST_ENTRY);
4980 if (gfc_add_result (&result->attr, result->name, NULL) == FAILURE
4981 || gfc_add_entry (&entry->attr, result->name, NULL) == FAILURE
4982 || gfc_add_function (&entry->attr, result->name, NULL)
4985 entry->result = result;
4989 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
4990 || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE)
4992 entry->result = entry;
4997 if (gfc_match_eos () != MATCH_YES)
4999 gfc_syntax_error (ST_ENTRY);
5003 entry->attr.recursive = proc->attr.recursive;
5004 entry->attr.elemental = proc->attr.elemental;
5005 entry->attr.pure = proc->attr.pure;
5007 el = gfc_get_entry_list ();
5009 el->next = gfc_current_ns->entries;
5010 gfc_current_ns->entries = el;
5012 el->id = el->next->id + 1;
5016 new_st.op = EXEC_ENTRY;
5017 new_st.ext.entry = el;
5023 /* Match a subroutine statement, including optional prefixes. */
5026 gfc_match_subroutine (void)
5028 char name[GFC_MAX_SYMBOL_LEN + 1];
5033 bool allow_binding_name;
5035 if (gfc_current_state () != COMP_NONE
5036 && gfc_current_state () != COMP_INTERFACE
5037 && gfc_current_state () != COMP_CONTAINS)
5040 m = gfc_match_prefix (NULL);
5044 m = gfc_match ("subroutine% %n", name);
5048 if (get_proc_name (name, &sym, false))
5051 if (add_hidden_procptr_result (sym) == SUCCESS)
5054 gfc_new_block = sym;
5056 /* Check what next non-whitespace character is so we can tell if there
5057 is the required parens if we have a BIND(C). */
5058 gfc_gobble_whitespace ();
5059 peek_char = gfc_peek_ascii_char ();
5061 if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE)
5064 if (gfc_match_formal_arglist (sym, 0, 1) != MATCH_YES)
5067 /* Make sure that it isn't already declared as BIND(C). If it is, it
5068 must have been marked BIND(C) with a BIND(C) attribute and that is
5069 not allowed for procedures. */
5070 if (sym->attr.is_bind_c == 1)
5072 sym->attr.is_bind_c = 0;
5073 if (sym->old_symbol != NULL)
5074 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5075 "variables or common blocks",
5076 &(sym->old_symbol->declared_at));
5078 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5079 "variables or common blocks", &gfc_current_locus);
5082 /* C binding names are not allowed for internal procedures. */
5083 if (gfc_current_state () == COMP_CONTAINS
5084 && sym->ns->proc_name->attr.flavor != FL_MODULE)
5085 allow_binding_name = false;
5087 allow_binding_name = true;
5089 /* Here, we are just checking if it has the bind(c) attribute, and if
5090 so, then we need to make sure it's all correct. If it doesn't,
5091 we still need to continue matching the rest of the subroutine line. */
5092 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
5093 if (is_bind_c == MATCH_ERROR)
5095 /* There was an attempt at the bind(c), but it was wrong. An
5096 error message should have been printed w/in the gfc_match_bind_c
5097 so here we'll just return the MATCH_ERROR. */
5101 if (is_bind_c == MATCH_YES)
5103 /* The following is allowed in the Fortran 2008 draft. */
5104 if (gfc_current_state () == COMP_CONTAINS
5105 && sym->ns->proc_name->attr.flavor != FL_MODULE
5106 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute "
5107 "at %L may not be specified for an internal "
5108 "procedure", &gfc_current_locus)
5112 if (peek_char != '(')
5114 gfc_error ("Missing required parentheses before BIND(C) at %C");
5117 if (gfc_add_is_bind_c (&(sym->attr), sym->name, &(sym->declared_at), 1)
5122 if (gfc_match_eos () != MATCH_YES)
5124 gfc_syntax_error (ST_SUBROUTINE);
5128 if (copy_prefix (&sym->attr, &sym->declared_at) == FAILURE)
5131 /* Warn if it has the same name as an intrinsic. */
5132 warn_intrinsic_shadow (sym, false);
5138 /* Match a BIND(C) specifier, with the optional 'name=' specifier if
5139 given, and set the binding label in either the given symbol (if not
5140 NULL), or in the current_ts. The symbol may be NULL because we may
5141 encounter the BIND(C) before the declaration itself. Return
5142 MATCH_NO if what we're looking at isn't a BIND(C) specifier,
5143 MATCH_ERROR if it is a BIND(C) clause but an error was encountered,
5144 or MATCH_YES if the specifier was correct and the binding label and
5145 bind(c) fields were set correctly for the given symbol or the
5146 current_ts. If allow_binding_name is false, no binding name may be
5150 gfc_match_bind_c (gfc_symbol *sym, bool allow_binding_name)
5152 /* binding label, if exists */
5153 char binding_label[GFC_MAX_SYMBOL_LEN + 1];
5157 /* Initialize the flag that specifies whether we encountered a NAME=
5158 specifier or not. */
5159 has_name_equals = 0;
5161 /* Init the first char to nil so we can catch if we don't have
5162 the label (name attr) or the symbol name yet. */
5163 binding_label[0] = '\0';
5165 /* This much we have to be able to match, in this order, if
5166 there is a bind(c) label. */
5167 if (gfc_match (" bind ( c ") != MATCH_YES)
5170 /* Now see if there is a binding label, or if we've reached the
5171 end of the bind(c) attribute without one. */
5172 if (gfc_match_char (',') == MATCH_YES)
5174 if (gfc_match (" name = ") != MATCH_YES)
5176 gfc_error ("Syntax error in NAME= specifier for binding label "
5178 /* should give an error message here */
5182 has_name_equals = 1;
5184 /* Get the opening quote. */
5185 double_quote = MATCH_YES;
5186 single_quote = MATCH_YES;
5187 double_quote = gfc_match_char ('"');
5188 if (double_quote != MATCH_YES)
5189 single_quote = gfc_match_char ('\'');
5190 if (double_quote != MATCH_YES && single_quote != MATCH_YES)
5192 gfc_error ("Syntax error in NAME= specifier for binding label "
5197 /* Grab the binding label, using functions that will not lower
5198 case the names automatically. */
5199 if (gfc_match_name_C (binding_label) != MATCH_YES)
5202 /* Get the closing quotation. */
5203 if (double_quote == MATCH_YES)
5205 if (gfc_match_char ('"') != MATCH_YES)
5207 gfc_error ("Missing closing quote '\"' for binding label at %C");
5208 /* User started string with '"' so looked to match it. */
5214 if (gfc_match_char ('\'') != MATCH_YES)
5216 gfc_error ("Missing closing quote '\'' for binding label at %C");
5217 /* User started string with "'" char. */
5223 /* Get the required right paren. */
5224 if (gfc_match_char (')') != MATCH_YES)
5226 gfc_error ("Missing closing paren for binding label at %C");
5230 if (has_name_equals && !allow_binding_name)
5232 gfc_error ("No binding name is allowed in BIND(C) at %C");
5236 if (has_name_equals && sym != NULL && sym->attr.dummy)
5238 gfc_error ("For dummy procedure %s, no binding name is "
5239 "allowed in BIND(C) at %C", sym->name);
5244 /* Save the binding label to the symbol. If sym is null, we're
5245 probably matching the typespec attributes of a declaration and
5246 haven't gotten the name yet, and therefore, no symbol yet. */
5247 if (binding_label[0] != '\0')
5251 strcpy (sym->binding_label, binding_label);
5254 strcpy (curr_binding_label, binding_label);
5256 else if (allow_binding_name)
5258 /* No binding label, but if symbol isn't null, we
5259 can set the label for it here.
5260 If name="" or allow_binding_name is false, no C binding name is
5262 if (sym != NULL && sym->name != NULL && has_name_equals == 0)
5263 strncpy (sym->binding_label, sym->name, strlen (sym->name) + 1);
5266 if (has_name_equals && gfc_current_state () == COMP_INTERFACE
5267 && current_interface.type == INTERFACE_ABSTRACT)
5269 gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C");
5277 /* Return nonzero if we're currently compiling a contained procedure. */
5280 contained_procedure (void)
5282 gfc_state_data *s = gfc_state_stack;
5284 if ((s->state == COMP_SUBROUTINE || s->state == COMP_FUNCTION)
5285 && s->previous != NULL && s->previous->state == COMP_CONTAINS)
5291 /* Set the kind of each enumerator. The kind is selected such that it is
5292 interoperable with the corresponding C enumeration type, making
5293 sure that -fshort-enums is honored. */
5298 enumerator_history *current_history = NULL;
5302 if (max_enum == NULL || enum_history == NULL)
5305 if (!flag_short_enums)
5311 kind = gfc_integer_kinds[i++].kind;
5313 while (kind < gfc_c_int_kind
5314 && gfc_check_integer_range (max_enum->initializer->value.integer,
5317 current_history = enum_history;
5318 while (current_history != NULL)
5320 current_history->sym->ts.kind = kind;
5321 current_history = current_history->next;
5326 /* Match any of the various end-block statements. Returns the type of
5327 END to the caller. The END INTERFACE, END IF, END DO and END
5328 SELECT statements cannot be replaced by a single END statement. */
5331 gfc_match_end (gfc_statement *st)
5333 char name[GFC_MAX_SYMBOL_LEN + 1];
5334 gfc_compile_state state;
5336 const char *block_name;
5341 old_loc = gfc_current_locus;
5342 if (gfc_match ("end") != MATCH_YES)
5345 state = gfc_current_state ();
5346 block_name = gfc_current_block () == NULL
5347 ? NULL : gfc_current_block ()->name;
5349 if (state == COMP_CONTAINS || state == COMP_DERIVED_CONTAINS)
5351 state = gfc_state_stack->previous->state;
5352 block_name = gfc_state_stack->previous->sym == NULL
5353 ? NULL : gfc_state_stack->previous->sym->name;
5360 *st = ST_END_PROGRAM;
5361 target = " program";
5365 case COMP_SUBROUTINE:
5366 *st = ST_END_SUBROUTINE;
5367 target = " subroutine";
5368 eos_ok = !contained_procedure ();
5372 *st = ST_END_FUNCTION;
5373 target = " function";
5374 eos_ok = !contained_procedure ();
5377 case COMP_BLOCK_DATA:
5378 *st = ST_END_BLOCK_DATA;
5379 target = " block data";
5384 *st = ST_END_MODULE;
5389 case COMP_INTERFACE:
5390 *st = ST_END_INTERFACE;
5391 target = " interface";
5396 case COMP_DERIVED_CONTAINS:
5415 *st = ST_END_SELECT;
5421 *st = ST_END_FORALL;
5436 last_initializer = NULL;
5438 gfc_free_enum_history ();
5442 gfc_error ("Unexpected END statement at %C");
5446 if (gfc_match_eos () == MATCH_YES)
5450 /* We would have required END [something]. */
5451 gfc_error ("%s statement expected at %L",
5452 gfc_ascii_statement (*st), &old_loc);
5459 /* Verify that we've got the sort of end-block that we're expecting. */
5460 if (gfc_match (target) != MATCH_YES)
5462 gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st));
5466 /* If we're at the end, make sure a block name wasn't required. */
5467 if (gfc_match_eos () == MATCH_YES)
5470 if (*st != ST_ENDDO && *st != ST_ENDIF && *st != ST_END_SELECT
5471 && *st != ST_END_FORALL && *st != ST_END_WHERE)
5474 if (gfc_current_block () == NULL)
5477 gfc_error ("Expected block name of '%s' in %s statement at %C",
5478 block_name, gfc_ascii_statement (*st));
5483 /* END INTERFACE has a special handler for its several possible endings. */
5484 if (*st == ST_END_INTERFACE)
5485 return gfc_match_end_interface ();
5487 /* We haven't hit the end of statement, so what is left must be an
5489 m = gfc_match_space ();
5491 m = gfc_match_name (name);
5494 gfc_error ("Expected terminating name at %C");
5498 if (block_name == NULL)
5501 if (strcmp (name, block_name) != 0 && strcmp (block_name, "ppr@") != 0)
5503 gfc_error ("Expected label '%s' for %s statement at %C", block_name,
5504 gfc_ascii_statement (*st));
5507 /* Procedure pointer as function result. */
5508 else if (strcmp (block_name, "ppr@") == 0
5509 && strcmp (name, gfc_current_block ()->ns->proc_name->name) != 0)
5511 gfc_error ("Expected label '%s' for %s statement at %C",
5512 gfc_current_block ()->ns->proc_name->name,
5513 gfc_ascii_statement (*st));
5517 if (gfc_match_eos () == MATCH_YES)
5521 gfc_syntax_error (*st);
5524 gfc_current_locus = old_loc;
5530 /***************** Attribute declaration statements ****************/
5532 /* Set the attribute of a single variable. */
5537 char name[GFC_MAX_SYMBOL_LEN + 1];
5545 m = gfc_match_name (name);
5549 if (find_special (name, &sym, false))
5552 var_locus = gfc_current_locus;
5554 /* Deal with possible array specification for certain attributes. */
5555 if (current_attr.dimension
5556 || current_attr.allocatable
5557 || current_attr.pointer
5558 || current_attr.target)
5560 m = gfc_match_array_spec (&as);
5561 if (m == MATCH_ERROR)
5564 if (current_attr.dimension && m == MATCH_NO)
5566 gfc_error ("Missing array specification at %L in DIMENSION "
5567 "statement", &var_locus);
5572 if (current_attr.dimension && sym->value)
5574 gfc_error ("Dimensions specified for %s at %L after its "
5575 "initialisation", sym->name, &var_locus);
5580 if ((current_attr.allocatable || current_attr.pointer)
5581 && (m == MATCH_YES) && (as->type != AS_DEFERRED))
5583 gfc_error ("Array specification must be deferred at %L", &var_locus);
5589 /* Update symbol table. DIMENSION attribute is set
5590 in gfc_set_array_spec(). */
5591 if (current_attr.dimension == 0
5592 && gfc_copy_attr (&sym->attr, ¤t_attr, &var_locus) == FAILURE)
5598 if (gfc_set_array_spec (sym, as, &var_locus) == FAILURE)
5604 if (sym->attr.cray_pointee && sym->as != NULL)
5606 /* Fix the array spec. */
5607 m = gfc_mod_pointee_as (sym->as);
5608 if (m == MATCH_ERROR)
5612 if (gfc_add_attribute (&sym->attr, &var_locus) == FAILURE)
5618 if ((current_attr.external || current_attr.intrinsic)
5619 && sym->attr.flavor != FL_PROCEDURE
5620 && gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL) == FAILURE)
5626 add_hidden_procptr_result (sym);
5631 gfc_free_array_spec (as);
5636 /* Generic attribute declaration subroutine. Used for attributes that
5637 just have a list of names. */
5644 /* Gobble the optional double colon, by simply ignoring the result
5654 if (gfc_match_eos () == MATCH_YES)
5660 if (gfc_match_char (',') != MATCH_YES)
5662 gfc_error ("Unexpected character in variable list at %C");
5672 /* This routine matches Cray Pointer declarations of the form:
5673 pointer ( <pointer>, <pointee> )
5675 pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ...
5676 The pointer, if already declared, should be an integer. Otherwise, we
5677 set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may
5678 be either a scalar, or an array declaration. No space is allocated for
5679 the pointee. For the statement
5680 pointer (ipt, ar(10))
5681 any subsequent uses of ar will be translated (in C-notation) as
5682 ar(i) => ((<type> *) ipt)(i)
5683 After gimplification, pointee variable will disappear in the code. */
5686 cray_pointer_decl (void)
5690 gfc_symbol *cptr; /* Pointer symbol. */
5691 gfc_symbol *cpte; /* Pointee symbol. */
5697 if (gfc_match_char ('(') != MATCH_YES)
5699 gfc_error ("Expected '(' at %C");
5703 /* Match pointer. */
5704 var_locus = gfc_current_locus;
5705 gfc_clear_attr (¤t_attr);
5706 gfc_add_cray_pointer (¤t_attr, &var_locus);
5707 current_ts.type = BT_INTEGER;
5708 current_ts.kind = gfc_index_integer_kind;
5710 m = gfc_match_symbol (&cptr, 0);
5713 gfc_error ("Expected variable name at %C");
5717 if (gfc_add_cray_pointer (&cptr->attr, &var_locus) == FAILURE)
5720 gfc_set_sym_referenced (cptr);
5722 if (cptr->ts.type == BT_UNKNOWN) /* Override the type, if necessary. */
5724 cptr->ts.type = BT_INTEGER;
5725 cptr->ts.kind = gfc_index_integer_kind;
5727 else if (cptr->ts.type != BT_INTEGER)
5729 gfc_error ("Cray pointer at %C must be an integer");
5732 else if (cptr->ts.kind < gfc_index_integer_kind)
5733 gfc_warning ("Cray pointer at %C has %d bytes of precision;"
5734 " memory addresses require %d bytes",
5735 cptr->ts.kind, gfc_index_integer_kind);
5737 if (gfc_match_char (',') != MATCH_YES)
5739 gfc_error ("Expected \",\" at %C");
5743 /* Match Pointee. */
5744 var_locus = gfc_current_locus;
5745 gfc_clear_attr (¤t_attr);
5746 gfc_add_cray_pointee (¤t_attr, &var_locus);
5747 current_ts.type = BT_UNKNOWN;
5748 current_ts.kind = 0;
5750 m = gfc_match_symbol (&cpte, 0);
5753 gfc_error ("Expected variable name at %C");
5757 /* Check for an optional array spec. */
5758 m = gfc_match_array_spec (&as);
5759 if (m == MATCH_ERROR)
5761 gfc_free_array_spec (as);
5764 else if (m == MATCH_NO)
5766 gfc_free_array_spec (as);
5770 if (gfc_add_cray_pointee (&cpte->attr, &var_locus) == FAILURE)
5773 gfc_set_sym_referenced (cpte);
5775 if (cpte->as == NULL)
5777 if (gfc_set_array_spec (cpte, as, &var_locus) == FAILURE)
5778 gfc_internal_error ("Couldn't set Cray pointee array spec.");
5780 else if (as != NULL)
5782 gfc_error ("Duplicate array spec for Cray pointee at %C");
5783 gfc_free_array_spec (as);
5789 if (cpte->as != NULL)
5791 /* Fix array spec. */
5792 m = gfc_mod_pointee_as (cpte->as);
5793 if (m == MATCH_ERROR)
5797 /* Point the Pointee at the Pointer. */
5798 cpte->cp_pointer = cptr;
5800 if (gfc_match_char (')') != MATCH_YES)
5802 gfc_error ("Expected \")\" at %C");
5805 m = gfc_match_char (',');
5807 done = true; /* Stop searching for more declarations. */
5811 if (m == MATCH_ERROR /* Failed when trying to find ',' above. */
5812 || gfc_match_eos () != MATCH_YES)
5814 gfc_error ("Expected \",\" or end of statement at %C");
5822 gfc_match_external (void)
5825 gfc_clear_attr (¤t_attr);
5826 current_attr.external = 1;
5828 return attr_decl ();
5833 gfc_match_intent (void)
5837 intent = match_intent_spec ();
5838 if (intent == INTENT_UNKNOWN)
5841 gfc_clear_attr (¤t_attr);
5842 current_attr.intent = intent;
5844 return attr_decl ();
5849 gfc_match_intrinsic (void)
5852 gfc_clear_attr (¤t_attr);
5853 current_attr.intrinsic = 1;
5855 return attr_decl ();
5860 gfc_match_optional (void)
5863 gfc_clear_attr (¤t_attr);
5864 current_attr.optional = 1;
5866 return attr_decl ();
5871 gfc_match_pointer (void)
5873 gfc_gobble_whitespace ();
5874 if (gfc_peek_ascii_char () == '(')
5876 if (!gfc_option.flag_cray_pointer)
5878 gfc_error ("Cray pointer declaration at %C requires -fcray-pointer "
5882 return cray_pointer_decl ();
5886 gfc_clear_attr (¤t_attr);
5887 current_attr.pointer = 1;
5889 return attr_decl ();
5895 gfc_match_allocatable (void)
5897 gfc_clear_attr (¤t_attr);
5898 current_attr.allocatable = 1;
5900 return attr_decl ();
5905 gfc_match_dimension (void)
5907 gfc_clear_attr (¤t_attr);
5908 current_attr.dimension = 1;
5910 return attr_decl ();
5915 gfc_match_target (void)
5917 gfc_clear_attr (¤t_attr);
5918 current_attr.target = 1;
5920 return attr_decl ();
5924 /* Match the list of entities being specified in a PUBLIC or PRIVATE
5928 access_attr_decl (gfc_statement st)
5930 char name[GFC_MAX_SYMBOL_LEN + 1];
5931 interface_type type;
5934 gfc_intrinsic_op op;
5937 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
5942 m = gfc_match_generic_spec (&type, name, &op);
5945 if (m == MATCH_ERROR)
5950 case INTERFACE_NAMELESS:
5951 case INTERFACE_ABSTRACT:
5954 case INTERFACE_GENERIC:
5955 if (gfc_get_symbol (name, NULL, &sym))
5958 if (gfc_add_access (&sym->attr, (st == ST_PUBLIC)
5959 ? ACCESS_PUBLIC : ACCESS_PRIVATE,
5960 sym->name, NULL) == FAILURE)
5965 case INTERFACE_INTRINSIC_OP:
5966 if (gfc_current_ns->operator_access[op] == ACCESS_UNKNOWN)
5968 gfc_current_ns->operator_access[op] =
5969 (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE;
5973 gfc_error ("Access specification of the %s operator at %C has "
5974 "already been specified", gfc_op2string (op));
5980 case INTERFACE_USER_OP:
5981 uop = gfc_get_uop (name);
5983 if (uop->access == ACCESS_UNKNOWN)
5985 uop->access = (st == ST_PUBLIC)
5986 ? ACCESS_PUBLIC : ACCESS_PRIVATE;
5990 gfc_error ("Access specification of the .%s. operator at %C "
5991 "has already been specified", sym->name);
5998 if (gfc_match_char (',') == MATCH_NO)
6002 if (gfc_match_eos () != MATCH_YES)
6007 gfc_syntax_error (st);
6015 gfc_match_protected (void)
6020 if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE)
6022 gfc_error ("PROTECTED at %C only allowed in specification "
6023 "part of a module");
6028 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED statement at %C")
6032 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6037 if (gfc_match_eos () == MATCH_YES)
6042 m = gfc_match_symbol (&sym, 0);
6046 if (gfc_add_protected (&sym->attr, sym->name, &gfc_current_locus)
6059 if (gfc_match_eos () == MATCH_YES)
6061 if (gfc_match_char (',') != MATCH_YES)
6068 gfc_error ("Syntax error in PROTECTED statement at %C");
6073 /* The PRIVATE statement is a bit weird in that it can be an attribute
6074 declaration, but also works as a standalone statement inside of a
6075 type declaration or a module. */
6078 gfc_match_private (gfc_statement *st)
6081 if (gfc_match ("private") != MATCH_YES)
6084 if (gfc_current_state () != COMP_MODULE
6085 && !(gfc_current_state () == COMP_DERIVED
6086 && gfc_state_stack->previous
6087 && gfc_state_stack->previous->state == COMP_MODULE)
6088 && !(gfc_current_state () == COMP_DERIVED_CONTAINS
6089 && gfc_state_stack->previous && gfc_state_stack->previous->previous
6090 && gfc_state_stack->previous->previous->state == COMP_MODULE))
6092 gfc_error ("PRIVATE statement at %C is only allowed in the "
6093 "specification part of a module");
6097 if (gfc_current_state () == COMP_DERIVED)
6099 if (gfc_match_eos () == MATCH_YES)
6105 gfc_syntax_error (ST_PRIVATE);
6109 if (gfc_match_eos () == MATCH_YES)
6116 return access_attr_decl (ST_PRIVATE);
6121 gfc_match_public (gfc_statement *st)
6124 if (gfc_match ("public") != MATCH_YES)
6127 if (gfc_current_state () != COMP_MODULE)
6129 gfc_error ("PUBLIC statement at %C is only allowed in the "
6130 "specification part of a module");
6134 if (gfc_match_eos () == MATCH_YES)
6141 return access_attr_decl (ST_PUBLIC);
6145 /* Workhorse for gfc_match_parameter. */
6154 m = gfc_match_symbol (&sym, 0);
6156 gfc_error ("Expected variable name at %C in PARAMETER statement");
6161 if (gfc_match_char ('=') == MATCH_NO)
6163 gfc_error ("Expected = sign in PARAMETER statement at %C");
6167 m = gfc_match_init_expr (&init);
6169 gfc_error ("Expected expression at %C in PARAMETER statement");
6173 if (sym->ts.type == BT_UNKNOWN
6174 && gfc_set_default_type (sym, 1, NULL) == FAILURE)
6180 if (gfc_check_assign_symbol (sym, init) == FAILURE
6181 || gfc_add_flavor (&sym->attr, FL_PARAMETER, sym->name, NULL) == FAILURE)
6189 gfc_error ("Initializing already initialized variable at %C");
6194 if (sym->ts.type == BT_CHARACTER
6195 && sym->ts.cl != NULL
6196 && sym->ts.cl->length != NULL
6197 && sym->ts.cl->length->expr_type == EXPR_CONSTANT
6198 && init->expr_type == EXPR_CONSTANT
6199 && init->ts.type == BT_CHARACTER)
6200 gfc_set_constant_character_len (
6201 mpz_get_si (sym->ts.cl->length->value.integer), init, -1);
6202 else if (sym->ts.type == BT_CHARACTER && sym->ts.cl != NULL
6203 && sym->ts.cl->length == NULL)
6206 if (init->expr_type == EXPR_CONSTANT)
6208 clen = init->value.character.length;
6209 sym->ts.cl->length = gfc_int_expr (clen);
6211 else if (init->expr_type == EXPR_ARRAY)
6213 gfc_expr *p = init->value.constructor->expr;
6214 clen = p->value.character.length;
6215 sym->ts.cl->length = gfc_int_expr (clen);
6217 else if (init->ts.cl && init->ts.cl->length)
6218 sym->ts.cl->length = gfc_copy_expr (sym->value->ts.cl->length);
6225 gfc_free_expr (init);
6230 /* Match a parameter statement, with the weird syntax that these have. */
6233 gfc_match_parameter (void)
6237 if (gfc_match_char ('(') == MATCH_NO)
6246 if (gfc_match (" )%t") == MATCH_YES)
6249 if (gfc_match_char (',') != MATCH_YES)
6251 gfc_error ("Unexpected characters in PARAMETER statement at %C");
6261 /* Save statements have a special syntax. */
6264 gfc_match_save (void)
6266 char n[GFC_MAX_SYMBOL_LEN+1];
6271 if (gfc_match_eos () == MATCH_YES)
6273 if (gfc_current_ns->seen_save)
6275 if (gfc_notify_std (GFC_STD_LEGACY, "Blanket SAVE statement at %C "
6276 "follows previous SAVE statement")
6281 gfc_current_ns->save_all = gfc_current_ns->seen_save = 1;
6285 if (gfc_current_ns->save_all)
6287 if (gfc_notify_std (GFC_STD_LEGACY, "SAVE statement at %C follows "
6288 "blanket SAVE statement")
6297 m = gfc_match_symbol (&sym, 0);
6301 if (gfc_add_save (&sym->attr, sym->name, &gfc_current_locus)
6313 m = gfc_match (" / %n /", &n);
6314 if (m == MATCH_ERROR)
6319 c = gfc_get_common (n, 0);
6322 gfc_current_ns->seen_save = 1;
6325 if (gfc_match_eos () == MATCH_YES)
6327 if (gfc_match_char (',') != MATCH_YES)
6334 gfc_error ("Syntax error in SAVE statement at %C");
6340 gfc_match_value (void)
6345 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE statement at %C")
6349 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6354 if (gfc_match_eos () == MATCH_YES)
6359 m = gfc_match_symbol (&sym, 0);
6363 if (gfc_add_value (&sym->attr, sym->name, &gfc_current_locus)
6376 if (gfc_match_eos () == MATCH_YES)
6378 if (gfc_match_char (',') != MATCH_YES)
6385 gfc_error ("Syntax error in VALUE statement at %C");
6391 gfc_match_volatile (void)
6396 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VOLATILE statement at %C")
6400 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6405 if (gfc_match_eos () == MATCH_YES)
6410 /* VOLATILE is special because it can be added to host-associated
6412 m = gfc_match_symbol (&sym, 1);
6416 if (gfc_add_volatile (&sym->attr, sym->name, &gfc_current_locus)
6429 if (gfc_match_eos () == MATCH_YES)
6431 if (gfc_match_char (',') != MATCH_YES)
6438 gfc_error ("Syntax error in VOLATILE statement at %C");
6443 /* Match a module procedure statement. Note that we have to modify
6444 symbols in the parent's namespace because the current one was there
6445 to receive symbols that are in an interface's formal argument list. */
6448 gfc_match_modproc (void)
6450 char name[GFC_MAX_SYMBOL_LEN + 1];
6453 gfc_namespace *module_ns;
6454 gfc_interface *old_interface_head, *interface;
6456 if (gfc_state_stack->state != COMP_INTERFACE
6457 || gfc_state_stack->previous == NULL
6458 || current_interface.type == INTERFACE_NAMELESS
6459 || current_interface.type == INTERFACE_ABSTRACT)
6461 gfc_error ("MODULE PROCEDURE at %C must be in a generic module "
6466 module_ns = gfc_current_ns->parent;
6467 for (; module_ns; module_ns = module_ns->parent)
6468 if (module_ns->proc_name->attr.flavor == FL_MODULE)
6471 if (module_ns == NULL)
6474 /* Store the current state of the interface. We will need it if we
6475 end up with a syntax error and need to recover. */
6476 old_interface_head = gfc_current_interface_head ();
6482 m = gfc_match_name (name);
6488 /* Check for syntax error before starting to add symbols to the
6489 current namespace. */
6490 if (gfc_match_eos () == MATCH_YES)
6492 if (!last && gfc_match_char (',') != MATCH_YES)
6495 /* Now we're sure the syntax is valid, we process this item
6497 if (gfc_get_symbol (name, module_ns, &sym))
6500 if (sym->attr.proc != PROC_MODULE
6501 && gfc_add_procedure (&sym->attr, PROC_MODULE,
6502 sym->name, NULL) == FAILURE)
6505 if (gfc_add_interface (sym) == FAILURE)
6508 sym->attr.mod_proc = 1;
6517 /* Restore the previous state of the interface. */
6518 interface = gfc_current_interface_head ();
6519 gfc_set_current_interface_head (old_interface_head);
6521 /* Free the new interfaces. */
6522 while (interface != old_interface_head)
6524 gfc_interface *i = interface->next;
6525 gfc_free (interface);
6529 /* And issue a syntax error. */
6530 gfc_syntax_error (ST_MODULE_PROC);
6535 /* Check a derived type that is being extended. */
6537 check_extended_derived_type (char *name)
6539 gfc_symbol *extended;
6541 if (gfc_find_symbol (name, gfc_current_ns, 1, &extended))
6543 gfc_error ("Ambiguous symbol in TYPE definition at %C");
6549 gfc_error ("No such symbol in TYPE definition at %C");
6553 if (extended->attr.flavor != FL_DERIVED)
6555 gfc_error ("'%s' in EXTENDS expression at %C is not a "
6556 "derived type", name);
6560 if (extended->attr.is_bind_c)
6562 gfc_error ("'%s' cannot be extended at %C because it "
6563 "is BIND(C)", extended->name);
6567 if (extended->attr.sequence)
6569 gfc_error ("'%s' cannot be extended at %C because it "
6570 "is a SEQUENCE type", extended->name);
6578 /* Match the optional attribute specifiers for a type declaration.
6579 Return MATCH_ERROR if an error is encountered in one of the handled
6580 attributes (public, private, bind(c)), MATCH_NO if what's found is
6581 not a handled attribute, and MATCH_YES otherwise. TODO: More error
6582 checking on attribute conflicts needs to be done. */
6585 gfc_get_type_attr_spec (symbol_attribute *attr, char *name)
6587 /* See if the derived type is marked as private. */
6588 if (gfc_match (" , private") == MATCH_YES)
6590 if (gfc_current_state () != COMP_MODULE)
6592 gfc_error ("Derived type at %C can only be PRIVATE in the "
6593 "specification part of a module");
6597 if (gfc_add_access (attr, ACCESS_PRIVATE, NULL, NULL) == FAILURE)
6600 else if (gfc_match (" , public") == MATCH_YES)
6602 if (gfc_current_state () != COMP_MODULE)
6604 gfc_error ("Derived type at %C can only be PUBLIC in the "
6605 "specification part of a module");
6609 if (gfc_add_access (attr, ACCESS_PUBLIC, NULL, NULL) == FAILURE)
6612 else if (gfc_match (" , bind ( c )") == MATCH_YES)
6614 /* If the type is defined to be bind(c) it then needs to make
6615 sure that all fields are interoperable. This will
6616 need to be a semantic check on the finished derived type.
6617 See 15.2.3 (lines 9-12) of F2003 draft. */
6618 if (gfc_add_is_bind_c (attr, NULL, &gfc_current_locus, 0) != SUCCESS)
6621 /* TODO: attr conflicts need to be checked, probably in symbol.c. */
6623 else if (gfc_match (" , abstract") == MATCH_YES)
6625 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ABSTRACT type at %C")
6629 if (gfc_add_abstract (attr, &gfc_current_locus) == FAILURE)
6632 else if (name && gfc_match(" , extends ( %n )", name) == MATCH_YES)
6634 if (gfc_add_extension (attr, &gfc_current_locus) == FAILURE)
6640 /* If we get here, something matched. */
6645 /* Match the beginning of a derived type declaration. If a type name
6646 was the result of a function, then it is possible to have a symbol
6647 already to be known as a derived type yet have no components. */
6650 gfc_match_derived_decl (void)
6652 char name[GFC_MAX_SYMBOL_LEN + 1];
6653 char parent[GFC_MAX_SYMBOL_LEN + 1];
6654 symbol_attribute attr;
6656 gfc_symbol *extended;
6658 match is_type_attr_spec = MATCH_NO;
6659 bool seen_attr = false;
6661 if (gfc_current_state () == COMP_DERIVED)
6666 gfc_clear_attr (&attr);
6671 is_type_attr_spec = gfc_get_type_attr_spec (&attr, parent);
6672 if (is_type_attr_spec == MATCH_ERROR)
6674 if (is_type_attr_spec == MATCH_YES)
6676 } while (is_type_attr_spec == MATCH_YES);
6678 /* Deal with derived type extensions. The extension attribute has
6679 been added to 'attr' but now the parent type must be found and
6682 extended = check_extended_derived_type (parent);
6684 if (parent[0] && !extended)
6687 if (gfc_match (" ::") != MATCH_YES && seen_attr)
6689 gfc_error ("Expected :: in TYPE definition at %C");
6693 m = gfc_match (" %n%t", name);
6697 /* Make sure the name is not the name of an intrinsic type. */
6698 if (gfc_is_intrinsic_typename (name))
6700 gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic "
6705 if (gfc_get_symbol (name, NULL, &sym))
6708 if (sym->ts.type != BT_UNKNOWN)
6710 gfc_error ("Derived type name '%s' at %C already has a basic type "
6711 "of %s", sym->name, gfc_typename (&sym->ts));
6715 /* The symbol may already have the derived attribute without the
6716 components. The ways this can happen is via a function
6717 definition, an INTRINSIC statement or a subtype in another
6718 derived type that is a pointer. The first part of the AND clause
6719 is true if the symbol is not the return value of a function. */
6720 if (sym->attr.flavor != FL_DERIVED
6721 && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE)
6724 if (sym->components != NULL || sym->attr.zero_comp)
6726 gfc_error ("Derived type definition of '%s' at %C has already been "
6727 "defined", sym->name);
6731 if (attr.access != ACCESS_UNKNOWN
6732 && gfc_add_access (&sym->attr, attr.access, sym->name, NULL) == FAILURE)
6735 /* See if the derived type was labeled as bind(c). */
6736 if (attr.is_bind_c != 0)
6737 sym->attr.is_bind_c = attr.is_bind_c;
6739 /* Construct the f2k_derived namespace if it is not yet there. */
6740 if (!sym->f2k_derived)
6741 sym->f2k_derived = gfc_get_namespace (NULL, 0);
6743 if (extended && !sym->components)
6748 /* Add the extended derived type as the first component. */
6749 gfc_add_component (sym, parent, &p);
6750 sym->attr.extension = attr.extension;
6752 gfc_set_sym_referenced (extended);
6754 p->ts.type = BT_DERIVED;
6755 p->ts.derived = extended;
6756 p->initializer = gfc_default_initializer (&p->ts);
6758 /* Provide the links between the extended type and its extension. */
6759 if (!extended->f2k_derived)
6760 extended->f2k_derived = gfc_get_namespace (NULL, 0);
6761 st = gfc_new_symtree (&extended->f2k_derived->sym_root, sym->name);
6765 /* Take over the ABSTRACT attribute. */
6766 sym->attr.abstract = attr.abstract;
6768 gfc_new_block = sym;
6774 /* Cray Pointees can be declared as:
6775 pointer (ipt, a (n,m,...,*))
6776 By default, this is treated as an AS_ASSUMED_SIZE array. We'll
6777 cheat and set a constant bound of 1 for the last dimension, if this
6778 is the case. Since there is no bounds-checking for Cray Pointees,
6779 this will be okay. */
6782 gfc_mod_pointee_as (gfc_array_spec *as)
6784 as->cray_pointee = true; /* This will be useful to know later. */
6785 if (as->type == AS_ASSUMED_SIZE)
6787 as->type = AS_EXPLICIT;
6788 as->upper[as->rank - 1] = gfc_int_expr (1);
6789 as->cp_was_assumed = true;
6791 else if (as->type == AS_ASSUMED_SHAPE)
6793 gfc_error ("Cray Pointee at %C cannot be assumed shape array");
6800 /* Match the enum definition statement, here we are trying to match
6801 the first line of enum definition statement.
6802 Returns MATCH_YES if match is found. */
6805 gfc_match_enum (void)
6809 m = gfc_match_eos ();
6813 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENUM and ENUMERATOR at %C")
6821 /* Returns an initializer whose value is one higher than the value of the
6822 LAST_INITIALIZER argument. If the argument is NULL, the
6823 initializers value will be set to zero. The initializer's kind
6824 will be set to gfc_c_int_kind.
6826 If -fshort-enums is given, the appropriate kind will be selected
6827 later after all enumerators have been parsed. A warning is issued
6828 here if an initializer exceeds gfc_c_int_kind. */
6831 enum_initializer (gfc_expr *last_initializer, locus where)
6835 result = gfc_get_expr ();
6836 result->expr_type = EXPR_CONSTANT;
6837 result->ts.type = BT_INTEGER;
6838 result->ts.kind = gfc_c_int_kind;
6839 result->where = where;
6841 mpz_init (result->value.integer);
6843 if (last_initializer != NULL)
6845 mpz_add_ui (result->value.integer, last_initializer->value.integer, 1);
6846 result->where = last_initializer->where;
6848 if (gfc_check_integer_range (result->value.integer,
6849 gfc_c_int_kind) != ARITH_OK)
6851 gfc_error ("Enumerator exceeds the C integer type at %C");
6857 /* Control comes here, if it's the very first enumerator and no
6858 initializer has been given. It will be initialized to zero. */
6859 mpz_set_si (result->value.integer, 0);
6866 /* Match a variable name with an optional initializer. When this
6867 subroutine is called, a variable is expected to be parsed next.
6868 Depending on what is happening at the moment, updates either the
6869 symbol table or the current interface. */
6872 enumerator_decl (void)
6874 char name[GFC_MAX_SYMBOL_LEN + 1];
6875 gfc_expr *initializer;
6876 gfc_array_spec *as = NULL;
6884 old_locus = gfc_current_locus;
6886 /* When we get here, we've just matched a list of attributes and
6887 maybe a type and a double colon. The next thing we expect to see
6888 is the name of the symbol. */
6889 m = gfc_match_name (name);
6893 var_locus = gfc_current_locus;
6895 /* OK, we've successfully matched the declaration. Now put the
6896 symbol in the current namespace. If we fail to create the symbol,
6898 if (build_sym (name, NULL, &as, &var_locus) == FAILURE)
6904 /* The double colon must be present in order to have initializers.
6905 Otherwise the statement is ambiguous with an assignment statement. */
6908 if (gfc_match_char ('=') == MATCH_YES)
6910 m = gfc_match_init_expr (&initializer);
6913 gfc_error ("Expected an initialization expression at %C");
6922 /* If we do not have an initializer, the initialization value of the
6923 previous enumerator (stored in last_initializer) is incremented
6924 by 1 and is used to initialize the current enumerator. */
6925 if (initializer == NULL)
6926 initializer = enum_initializer (last_initializer, old_locus);
6928 if (initializer == NULL || initializer->ts.type != BT_INTEGER)
6930 gfc_error("ENUMERATOR %L not initialized with integer expression",
6933 gfc_free_enum_history ();
6937 /* Store this current initializer, for the next enumerator variable
6938 to be parsed. add_init_expr_to_sym() zeros initializer, so we
6939 use last_initializer below. */
6940 last_initializer = initializer;
6941 t = add_init_expr_to_sym (name, &initializer, &var_locus);
6943 /* Maintain enumerator history. */
6944 gfc_find_symbol (name, NULL, 0, &sym);
6945 create_enum_history (sym, last_initializer);
6947 return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR;
6950 /* Free stuff up and return. */
6951 gfc_free_expr (initializer);
6957 /* Match the enumerator definition statement. */
6960 gfc_match_enumerator_def (void)
6965 gfc_clear_ts (¤t_ts);
6967 m = gfc_match (" enumerator");
6971 m = gfc_match (" :: ");
6972 if (m == MATCH_ERROR)
6975 colon_seen = (m == MATCH_YES);
6977 if (gfc_current_state () != COMP_ENUM)
6979 gfc_error ("ENUM definition statement expected before %C");
6980 gfc_free_enum_history ();
6984 (¤t_ts)->type = BT_INTEGER;
6985 (¤t_ts)->kind = gfc_c_int_kind;
6987 gfc_clear_attr (¤t_attr);
6988 t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, NULL);
6997 m = enumerator_decl ();
6998 if (m == MATCH_ERROR)
7003 if (gfc_match_eos () == MATCH_YES)
7005 if (gfc_match_char (',') != MATCH_YES)
7009 if (gfc_current_state () == COMP_ENUM)
7011 gfc_free_enum_history ();
7012 gfc_error ("Syntax error in ENUMERATOR definition at %C");
7017 gfc_free_array_spec (current_as);
7024 /* Match binding attributes. */
7027 match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc)
7029 bool found_passing = false;
7030 bool seen_ptr = false;
7033 /* Intialize to defaults. Do so even before the MATCH_NO check so that in
7034 this case the defaults are in there. */
7035 ba->access = ACCESS_UNKNOWN;
7036 ba->pass_arg = NULL;
7037 ba->pass_arg_num = 0;
7039 ba->non_overridable = 0;
7042 /* If we find a comma, we believe there are binding attributes. */
7043 if (gfc_match_char (',') == MATCH_NO)
7045 ba->access = gfc_typebound_default_access;
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 = xstrdup (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");
7153 /* NON_OVERRIDABLE flag. */
7154 m = gfc_match (" non_overridable");
7155 if (m == MATCH_ERROR)
7159 if (ba->non_overridable)
7161 gfc_error ("Duplicate NON_OVERRIDABLE at %C");
7165 ba->non_overridable = 1;
7169 /* DEFERRED flag. */
7170 m = gfc_match (" deferred");
7171 if (m == MATCH_ERROR)
7177 gfc_error ("Duplicate DEFERRED at %C");
7188 /* Nothing matching found. */
7190 gfc_error ("Expected access-specifier at %C");
7192 gfc_error ("Expected binding attribute at %C");
7195 while (gfc_match_char (',') == MATCH_YES);
7197 /* NON_OVERRIDABLE and DEFERRED exclude themselves. */
7198 if (ba->non_overridable && ba->deferred)
7200 gfc_error ("NON_OVERRIDABLE and DEFERRED can't both appear at %C");
7204 if (ba->access == ACCESS_UNKNOWN)
7205 ba->access = gfc_typebound_default_access;
7207 if (ppc && !seen_ptr)
7209 gfc_error ("POINTER attribute is required for procedure pointer component"
7217 gfc_free (ba->pass_arg);
7222 /* Match a PROCEDURE specific binding inside a derived type. */
7225 match_procedure_in_type (void)
7227 char name[GFC_MAX_SYMBOL_LEN + 1];
7228 char target_buf[GFC_MAX_SYMBOL_LEN + 1];
7229 char* target = NULL;
7230 gfc_typebound_proc* tb;
7238 /* Check current state. */
7239 gcc_assert (gfc_state_stack->state == COMP_DERIVED_CONTAINS);
7240 block = gfc_state_stack->previous->sym;
7243 /* Try to match PROCEDURE(interface). */
7244 if (gfc_match (" (") == MATCH_YES)
7246 m = gfc_match_name (target_buf);
7247 if (m == MATCH_ERROR)
7251 gfc_error ("Interface-name expected after '(' at %C");
7255 if (gfc_match (" )") != MATCH_YES)
7257 gfc_error ("')' expected at %C");
7261 target = target_buf;
7264 /* Construct the data structure. */
7265 tb = gfc_get_typebound_proc ();
7266 tb->where = gfc_current_locus;
7269 /* Match binding attributes. */
7270 m = match_binding_attributes (tb, false, false);
7271 if (m == MATCH_ERROR)
7273 seen_attrs = (m == MATCH_YES);
7275 /* Check that attribute DEFERRED is given iff an interface is specified, which
7276 means target != NULL. */
7277 if (tb->deferred && !target)
7279 gfc_error ("Interface must be specified for DEFERRED binding at %C");
7282 if (target && !tb->deferred)
7284 gfc_error ("PROCEDURE(interface) at %C should be declared DEFERRED");
7288 /* Match the colons. */
7289 m = gfc_match (" ::");
7290 if (m == MATCH_ERROR)
7292 seen_colons = (m == MATCH_YES);
7293 if (seen_attrs && !seen_colons)
7295 gfc_error ("Expected '::' after binding-attributes at %C");
7299 /* Match the binding name. */
7300 m = gfc_match_name (name);
7301 if (m == MATCH_ERROR)
7305 gfc_error ("Expected binding name at %C");
7309 /* Try to match the '=> target', if it's there. */
7310 m = gfc_match (" =>");
7311 if (m == MATCH_ERROR)
7317 gfc_error ("'=> target' is invalid for DEFERRED binding at %C");
7323 gfc_error ("'::' needed in PROCEDURE binding with explicit target"
7328 m = gfc_match_name (target_buf);
7329 if (m == MATCH_ERROR)
7333 gfc_error ("Expected binding target after '=>' at %C");
7336 target = target_buf;
7339 /* Now we should have the end. */
7340 m = gfc_match_eos ();
7341 if (m == MATCH_ERROR)
7345 gfc_error ("Junk after PROCEDURE declaration at %C");
7349 /* If no target was found, it has the same name as the binding. */
7353 /* Get the namespace to insert the symbols into. */
7354 ns = block->f2k_derived;
7357 /* If the binding is DEFERRED, check that the containing type is ABSTRACT. */
7358 if (tb->deferred && !block->attr.abstract)
7360 gfc_error ("Type '%s' containing DEFERRED binding at %C is not ABSTRACT",
7365 /* See if we already have a binding with this name in the symtree which would
7366 be an error. If a GENERIC already targetted this binding, it may be
7367 already there but then typebound is still NULL. */
7368 stree = gfc_find_symtree (ns->tb_sym_root, name);
7369 if (stree && stree->n.tb)
7371 gfc_error ("There's already a procedure with binding name '%s' for the"
7372 " derived type '%s' at %C", name, block->name);
7376 /* Insert it and set attributes. */
7380 stree = gfc_new_symtree (&ns->tb_sym_root, name);
7385 if (gfc_get_sym_tree (target, gfc_current_ns, &tb->u.specific, false))
7387 gfc_set_sym_referenced (tb->u.specific->n.sym);
7393 /* Match a GENERIC procedure binding inside a derived type. */
7396 gfc_match_generic (void)
7398 char name[GFC_MAX_SYMBOL_LEN + 1];
7400 gfc_typebound_proc tbattr; /* Used for match_binding_attributes. */
7401 gfc_typebound_proc* tb;
7406 /* Check current state. */
7407 if (gfc_current_state () == COMP_DERIVED)
7409 gfc_error ("GENERIC at %C must be inside a derived-type CONTAINS");
7412 if (gfc_current_state () != COMP_DERIVED_CONTAINS)
7414 block = gfc_state_stack->previous->sym;
7415 ns = block->f2k_derived;
7416 gcc_assert (block && ns);
7418 /* See if we get an access-specifier. */
7419 m = match_binding_attributes (&tbattr, true, false);
7420 if (m == MATCH_ERROR)
7423 /* Now the colons, those are required. */
7424 if (gfc_match (" ::") != MATCH_YES)
7426 gfc_error ("Expected '::' at %C");
7430 /* The binding name and =>. */
7431 m = gfc_match (" %n =>", name);
7432 if (m == MATCH_ERROR)
7436 gfc_error ("Expected generic name at %C");
7440 /* If there's already something with this name, check that it is another
7441 GENERIC and then extend that rather than build a new node. */
7442 st = gfc_find_symtree (ns->tb_sym_root, name);
7445 gcc_assert (st->n.tb);
7448 if (!tb->is_generic)
7450 gfc_error ("There's already a non-generic procedure with binding name"
7451 " '%s' for the derived type '%s' at %C",
7456 if (tb->access != tbattr.access)
7458 gfc_error ("Binding at %C must have the same access as already"
7459 " defined binding '%s'", name);
7465 st = gfc_new_symtree (&ns->tb_sym_root, name);
7468 st->n.tb = tb = gfc_get_typebound_proc ();
7469 tb->where = gfc_current_locus;
7470 tb->access = tbattr.access;
7472 tb->u.generic = NULL;
7475 /* Now, match all following names as specific targets. */
7478 gfc_symtree* target_st;
7479 gfc_tbp_generic* target;
7481 m = gfc_match_name (name);
7482 if (m == MATCH_ERROR)
7486 gfc_error ("Expected specific binding name at %C");
7490 target_st = gfc_get_tbp_symtree (&ns->tb_sym_root, name);
7492 /* See if this is a duplicate specification. */
7493 for (target = tb->u.generic; target; target = target->next)
7494 if (target_st == target->specific_st)
7496 gfc_error ("'%s' already defined as specific binding for the"
7497 " generic '%s' at %C", name, st->name);
7501 target = gfc_get_tbp_generic ();
7502 target->specific_st = target_st;
7503 target->specific = NULL;
7504 target->next = tb->u.generic;
7505 tb->u.generic = target;
7507 while (gfc_match (" ,") == MATCH_YES);
7509 /* Here should be the end. */
7510 if (gfc_match_eos () != MATCH_YES)
7512 gfc_error ("Junk after GENERIC binding at %C");
7523 /* Match a FINAL declaration inside a derived type. */
7526 gfc_match_final_decl (void)
7528 char name[GFC_MAX_SYMBOL_LEN + 1];
7531 gfc_namespace* module_ns;
7535 if (gfc_state_stack->state != COMP_DERIVED_CONTAINS)
7537 gfc_error ("FINAL declaration at %C must be inside a derived type "
7538 "CONTAINS section");
7542 block = gfc_state_stack->previous->sym;
7545 if (!gfc_state_stack->previous || !gfc_state_stack->previous->previous
7546 || gfc_state_stack->previous->previous->state != COMP_MODULE)
7548 gfc_error ("Derived type declaration with FINAL at %C must be in the"
7549 " specification part of a MODULE");
7553 module_ns = gfc_current_ns;
7554 gcc_assert (module_ns);
7555 gcc_assert (module_ns->proc_name->attr.flavor == FL_MODULE);
7557 /* Match optional ::, don't care about MATCH_YES or MATCH_NO. */
7558 if (gfc_match (" ::") == MATCH_ERROR)
7561 /* Match the sequence of procedure names. */
7568 if (first && gfc_match_eos () == MATCH_YES)
7570 gfc_error ("Empty FINAL at %C");
7574 m = gfc_match_name (name);
7577 gfc_error ("Expected module procedure name at %C");
7580 else if (m != MATCH_YES)
7583 if (gfc_match_eos () == MATCH_YES)
7585 if (!last && gfc_match_char (',') != MATCH_YES)
7587 gfc_error ("Expected ',' at %C");
7591 if (gfc_get_symbol (name, module_ns, &sym))
7593 gfc_error ("Unknown procedure name \"%s\" at %C", name);
7597 /* Mark the symbol as module procedure. */
7598 if (sym->attr.proc != PROC_MODULE
7599 && gfc_add_procedure (&sym->attr, PROC_MODULE,
7600 sym->name, NULL) == FAILURE)
7603 /* Check if we already have this symbol in the list, this is an error. */
7604 for (f = block->f2k_derived->finalizers; f; f = f->next)
7605 if (f->proc_sym == sym)
7607 gfc_error ("'%s' at %C is already defined as FINAL procedure!",
7612 /* Add this symbol to the list of finalizers. */
7613 gcc_assert (block->f2k_derived);
7615 f = XCNEW (gfc_finalizer);
7617 f->proc_tree = NULL;
7618 f->where = gfc_current_locus;
7619 f->next = block->f2k_derived->finalizers;
7620 block->f2k_derived->finalizers = f;
7630 const ext_attr_t ext_attr_list[] = {
7631 { "dllimport", EXT_ATTR_DLLIMPORT, "dllimport" },
7632 { "dllexport", EXT_ATTR_DLLEXPORT, "dllexport" },
7633 { "cdecl", EXT_ATTR_CDECL, "cdecl" },
7634 { "stdcall", EXT_ATTR_STDCALL, "stdcall" },
7635 { "fastcall", EXT_ATTR_FASTCALL, "fastcall" },
7636 { NULL, EXT_ATTR_LAST, NULL }
7639 /* Match a !GCC$ ATTRIBUTES statement of the form:
7640 !GCC$ ATTRIBUTES attribute-list :: var-name [, var-name] ...
7641 When we come here, we have already matched the !GCC$ ATTRIBUTES string.
7643 TODO: We should support all GCC attributes using the same syntax for
7644 the attribute list, i.e. the list in C
7645 __attributes(( attribute-list ))
7647 !GCC$ ATTRIBUTES attribute-list ::
7648 Cf. c-parser.c's c_parser_attributes; the data can then directly be
7651 As there is absolutely no risk of confusion, we should never return
7654 gfc_match_gcc_attributes (void)
7656 symbol_attribute attr;
7657 char name[GFC_MAX_SYMBOL_LEN + 1];
7662 gfc_clear_attr (&attr);
7667 if (gfc_match_name (name) != MATCH_YES)
7670 for (id = 0; id < EXT_ATTR_LAST; id++)
7671 if (strcmp (name, ext_attr_list[id].name) == 0)
7674 if (id == EXT_ATTR_LAST)
7676 gfc_error ("Unknown attribute in !GCC$ ATTRIBUTES statement at %C");
7680 if (gfc_add_ext_attribute (&attr, id, &gfc_current_locus)
7684 gfc_gobble_whitespace ();
7685 ch = gfc_next_ascii_char ();
7688 /* This is the successful exit condition for the loop. */
7689 if (gfc_next_ascii_char () == ':')
7699 if (gfc_match_eos () == MATCH_YES)
7704 m = gfc_match_name (name);
7708 if (find_special (name, &sym, true))
7711 sym->attr.ext_attr |= attr.ext_attr;
7713 if (gfc_match_eos () == MATCH_YES)
7716 if (gfc_match_char (',') != MATCH_YES)
7723 gfc_error ("Syntax error in !GCC$ ATTRIBUTES statement at %C");