1 /* Declaration statement matcher
2 Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008, 2009
3 Free Software Foundation, Inc.
4 Contributed by Andy Vaught
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
30 /* Macros to access allocate memory for gfc_data_variable,
31 gfc_data_value and gfc_data. */
32 #define gfc_get_data_variable() XCNEW (gfc_data_variable)
33 #define gfc_get_data_value() XCNEW (gfc_data_value)
34 #define gfc_get_data() XCNEW (gfc_data)
37 /* This flag is set if an old-style length selector is matched
38 during a type-declaration statement. */
40 static int old_char_selector;
42 /* When variables acquire types and attributes from a declaration
43 statement, they get them from the following static variables. The
44 first part of a declaration sets these variables and the second
45 part copies these into symbol structures. */
47 static gfc_typespec current_ts;
49 static symbol_attribute current_attr;
50 static gfc_array_spec *current_as;
51 static int colon_seen;
53 /* The current binding label (if any). */
54 static char curr_binding_label[GFC_MAX_BINDING_LABEL_LEN + 1];
55 /* Need to know how many identifiers are on the current data declaration
56 line in case we're given the BIND(C) attribute with a NAME= specifier. */
57 static int num_idents_on_line;
58 /* Need to know if a NAME= specifier was found during gfc_match_bind_c so we
59 can supply a name if the curr_binding_label is nil and NAME= was not. */
60 static int has_name_equals = 0;
62 /* Initializer of the previous enumerator. */
64 static gfc_expr *last_initializer;
66 /* History of all the enumerators is maintained, so that
67 kind values of all the enumerators could be updated depending
68 upon the maximum initialized value. */
70 typedef struct enumerator_history
73 gfc_expr *initializer;
74 struct enumerator_history *next;
78 /* Header of enum history chain. */
80 static enumerator_history *enum_history = NULL;
82 /* Pointer of enum history node containing largest initializer. */
84 static enumerator_history *max_enum = NULL;
86 /* gfc_new_block points to the symbol of a newly matched block. */
88 gfc_symbol *gfc_new_block;
90 bool gfc_matching_function;
93 /********************* DATA statement subroutines *********************/
95 static bool in_match_data = false;
98 gfc_in_match_data (void)
100 return in_match_data;
104 set_in_match_data (bool set_value)
106 in_match_data = set_value;
109 /* Free a gfc_data_variable structure and everything beneath it. */
112 free_variable (gfc_data_variable *p)
114 gfc_data_variable *q;
119 gfc_free_expr (p->expr);
120 gfc_free_iterator (&p->iter, 0);
121 free_variable (p->list);
127 /* Free a gfc_data_value structure and everything beneath it. */
130 free_value (gfc_data_value *p)
137 gfc_free_expr (p->expr);
143 /* Free a list of gfc_data structures. */
146 gfc_free_data (gfc_data *p)
153 free_variable (p->var);
154 free_value (p->value);
160 /* Free all data in a namespace. */
163 gfc_free_data_all (gfc_namespace *ns)
176 static match var_element (gfc_data_variable *);
178 /* Match a list of variables terminated by an iterator and a right
182 var_list (gfc_data_variable *parent)
184 gfc_data_variable *tail, var;
187 m = var_element (&var);
188 if (m == MATCH_ERROR)
193 tail = gfc_get_data_variable ();
200 if (gfc_match_char (',') != MATCH_YES)
203 m = gfc_match_iterator (&parent->iter, 1);
206 if (m == MATCH_ERROR)
209 m = var_element (&var);
210 if (m == MATCH_ERROR)
215 tail->next = gfc_get_data_variable ();
221 if (gfc_match_char (')') != MATCH_YES)
226 gfc_syntax_error (ST_DATA);
231 /* Match a single element in a data variable list, which can be a
232 variable-iterator list. */
235 var_element (gfc_data_variable *new_var)
240 memset (new_var, 0, sizeof (gfc_data_variable));
242 if (gfc_match_char ('(') == MATCH_YES)
243 return var_list (new_var);
245 m = gfc_match_variable (&new_var->expr, 0);
249 sym = new_var->expr->symtree->n.sym;
251 /* Symbol should already have an associated type. */
252 if (gfc_check_symbol_typed (sym, gfc_current_ns,
253 false, gfc_current_locus) == FAILURE)
256 if (!sym->attr.function && gfc_current_ns->parent
257 && gfc_current_ns->parent == sym->ns)
259 gfc_error ("Host associated variable '%s' may not be in the DATA "
260 "statement at %C", sym->name);
264 if (gfc_current_state () != COMP_BLOCK_DATA
265 && sym->attr.in_common
266 && gfc_notify_std (GFC_STD_GNU, "Extension: initialization of "
267 "common block variable '%s' in DATA statement at %C",
268 sym->name) == FAILURE)
271 if (gfc_add_data (&sym->attr, sym->name, &new_var->expr->where) == FAILURE)
278 /* Match the top-level list of data variables. */
281 top_var_list (gfc_data *d)
283 gfc_data_variable var, *tail, *new_var;
290 m = var_element (&var);
293 if (m == MATCH_ERROR)
296 new_var = gfc_get_data_variable ();
302 tail->next = new_var;
306 if (gfc_match_char ('/') == MATCH_YES)
308 if (gfc_match_char (',') != MATCH_YES)
315 gfc_syntax_error (ST_DATA);
316 gfc_free_data_all (gfc_current_ns);
322 match_data_constant (gfc_expr **result)
324 char name[GFC_MAX_SYMBOL_LEN + 1];
330 m = gfc_match_literal_constant (&expr, 1);
337 if (m == MATCH_ERROR)
340 m = gfc_match_null (result);
344 old_loc = gfc_current_locus;
346 /* Should this be a structure component, try to match it
347 before matching a name. */
348 m = gfc_match_rvalue (result);
349 if (m == MATCH_ERROR)
352 if (m == MATCH_YES && (*result)->expr_type == EXPR_STRUCTURE)
354 if (gfc_simplify_expr (*result, 0) == FAILURE)
359 gfc_current_locus = old_loc;
361 m = gfc_match_name (name);
365 if (gfc_find_symbol (name, NULL, 1, &sym))
369 || (sym->attr.flavor != FL_PARAMETER && sym->attr.flavor != FL_DERIVED))
371 gfc_error ("Symbol '%s' must be a PARAMETER in DATA statement at %C",
375 else if (sym->attr.flavor == FL_DERIVED)
376 return gfc_match_structure_constructor (sym, result, false);
378 /* Check to see if the value is an initialization array expression. */
379 if (sym->value->expr_type == EXPR_ARRAY)
381 gfc_current_locus = old_loc;
383 m = gfc_match_init_expr (result);
384 if (m == MATCH_ERROR)
389 if (gfc_simplify_expr (*result, 0) == FAILURE)
392 if ((*result)->expr_type == EXPR_CONSTANT)
396 gfc_error ("Invalid initializer %s in Data statement at %C", name);
402 *result = gfc_copy_expr (sym->value);
407 /* Match a list of values in a DATA statement. The leading '/' has
408 already been seen at this point. */
411 top_val_list (gfc_data *data)
413 gfc_data_value *new_val, *tail;
421 m = match_data_constant (&expr);
424 if (m == MATCH_ERROR)
427 new_val = gfc_get_data_value ();
428 mpz_init (new_val->repeat);
431 data->value = new_val;
433 tail->next = new_val;
437 if (expr->ts.type != BT_INTEGER || gfc_match_char ('*') != MATCH_YES)
440 mpz_set_ui (tail->repeat, 1);
444 if (expr->ts.type == BT_INTEGER)
445 mpz_set (tail->repeat, expr->value.integer);
446 gfc_free_expr (expr);
448 m = match_data_constant (&tail->expr);
451 if (m == MATCH_ERROR)
455 if (gfc_match_char ('/') == MATCH_YES)
457 if (gfc_match_char (',') == MATCH_NO)
464 gfc_syntax_error (ST_DATA);
465 gfc_free_data_all (gfc_current_ns);
470 /* Matches an old style initialization. */
473 match_old_style_init (const char *name)
480 /* Set up data structure to hold initializers. */
481 gfc_find_sym_tree (name, NULL, 0, &st);
484 newdata = gfc_get_data ();
485 newdata->var = gfc_get_data_variable ();
486 newdata->var->expr = gfc_get_variable_expr (st);
487 newdata->where = gfc_current_locus;
489 /* Match initial value list. This also eats the terminal '/'. */
490 m = top_val_list (newdata);
499 gfc_error ("Initialization at %C is not allowed in a PURE procedure");
504 /* Mark the variable as having appeared in a data statement. */
505 if (gfc_add_data (&sym->attr, sym->name, &sym->declared_at) == FAILURE)
511 /* Chain in namespace list of DATA initializers. */
512 newdata->next = gfc_current_ns->data;
513 gfc_current_ns->data = newdata;
519 /* Match the stuff following a DATA statement. If ERROR_FLAG is set,
520 we are matching a DATA statement and are therefore issuing an error
521 if we encounter something unexpected, if not, we're trying to match
522 an old-style initialization expression of the form INTEGER I /2/. */
525 gfc_match_data (void)
530 set_in_match_data (true);
534 new_data = gfc_get_data ();
535 new_data->where = gfc_current_locus;
537 m = top_var_list (new_data);
541 m = top_val_list (new_data);
545 new_data->next = gfc_current_ns->data;
546 gfc_current_ns->data = new_data;
548 if (gfc_match_eos () == MATCH_YES)
551 gfc_match_char (','); /* Optional comma */
554 set_in_match_data (false);
558 gfc_error ("DATA statement at %C is not allowed in a PURE procedure");
565 set_in_match_data (false);
566 gfc_free_data (new_data);
571 /************************ Declaration statements *********************/
573 /* Match an intent specification. Since this can only happen after an
574 INTENT word, a legal intent-spec must follow. */
577 match_intent_spec (void)
580 if (gfc_match (" ( in out )") == MATCH_YES)
582 if (gfc_match (" ( in )") == MATCH_YES)
584 if (gfc_match (" ( out )") == MATCH_YES)
587 gfc_error ("Bad INTENT specification at %C");
588 return INTENT_UNKNOWN;
592 /* Matches a character length specification, which is either a
593 specification expression or a '*'. */
596 char_len_param_value (gfc_expr **expr)
600 if (gfc_match_char ('*') == MATCH_YES)
606 m = gfc_match_expr (expr);
609 && gfc_expr_check_typed (*expr, gfc_current_ns, false) == FAILURE)
612 if (m == MATCH_YES && (*expr)->expr_type == EXPR_FUNCTION)
614 if ((*expr)->value.function.actual
615 && (*expr)->value.function.actual->expr->symtree)
618 e = (*expr)->value.function.actual->expr;
619 if (e->symtree->n.sym->attr.flavor == FL_PROCEDURE
620 && e->expr_type == EXPR_VARIABLE)
622 if (e->symtree->n.sym->ts.type == BT_UNKNOWN)
624 if (e->symtree->n.sym->ts.type == BT_CHARACTER
625 && e->symtree->n.sym->ts.cl
626 && e->symtree->n.sym->ts.cl->length->ts.type == BT_UNKNOWN)
634 gfc_error ("Conflict in attributes of function argument at %C");
639 /* A character length is a '*' followed by a literal integer or a
640 char_len_param_value in parenthesis. */
643 match_char_length (gfc_expr **expr)
648 m = gfc_match_char ('*');
652 m = gfc_match_small_literal_int (&length, NULL);
653 if (m == MATCH_ERROR)
658 if (gfc_notify_std (GFC_STD_F95_OBS, "Obsolescent feature: "
659 "Old-style character length at %C") == FAILURE)
661 *expr = gfc_int_expr (length);
665 if (gfc_match_char ('(') == MATCH_NO)
668 m = char_len_param_value (expr);
669 if (m != MATCH_YES && gfc_matching_function)
675 if (m == MATCH_ERROR)
680 if (gfc_match_char (')') == MATCH_NO)
682 gfc_free_expr (*expr);
690 gfc_error ("Syntax error in character length specification at %C");
695 /* Special subroutine for finding a symbol. Check if the name is found
696 in the current name space. If not, and we're compiling a function or
697 subroutine and the parent compilation unit is an interface, then check
698 to see if the name we've been given is the name of the interface
699 (located in another namespace). */
702 find_special (const char *name, gfc_symbol **result, bool allow_subroutine)
708 i = gfc_get_sym_tree (name, NULL, &st, allow_subroutine);
711 *result = st ? st->n.sym : NULL;
715 if (gfc_current_state () != COMP_SUBROUTINE
716 && gfc_current_state () != COMP_FUNCTION)
719 s = gfc_state_stack->previous;
723 if (s->state != COMP_INTERFACE)
726 goto end; /* Nameless interface. */
728 if (strcmp (name, s->sym->name) == 0)
739 /* Special subroutine for getting a symbol node associated with a
740 procedure name, used in SUBROUTINE and FUNCTION statements. The
741 symbol is created in the parent using with symtree node in the
742 child unit pointing to the symbol. If the current namespace has no
743 parent, then the symbol is just created in the current unit. */
746 get_proc_name (const char *name, gfc_symbol **result, bool module_fcn_entry)
752 /* Module functions have to be left in their own namespace because
753 they have potentially (almost certainly!) already been referenced.
754 In this sense, they are rather like external functions. This is
755 fixed up in resolve.c(resolve_entries), where the symbol name-
756 space is set to point to the master function, so that the fake
757 result mechanism can work. */
758 if (module_fcn_entry)
760 /* Present if entry is declared to be a module procedure. */
761 rc = gfc_find_symbol (name, gfc_current_ns->parent, 0, result);
764 rc = gfc_get_symbol (name, NULL, result);
765 else if (!gfc_get_symbol (name, NULL, &sym) && sym
766 && (*result)->ts.type == BT_UNKNOWN
767 && sym->attr.flavor == FL_UNKNOWN)
768 /* Pick up the typespec for the entry, if declared in the function
769 body. Note that this symbol is FL_UNKNOWN because it will
770 only have appeared in a type declaration. The local symtree
771 is set to point to the module symbol and a unique symtree
772 to the local version. This latter ensures a correct clearing
775 /* If the ENTRY proceeds its specification, we need to ensure
776 that this does not raise a "has no IMPLICIT type" error. */
777 if (sym->ts.type == BT_UNKNOWN)
778 sym->attr.untyped = 1;
780 (*result)->ts = sym->ts;
782 /* Put the symbol in the procedure namespace so that, should
783 the ENTRY precede its specification, the specification
785 (*result)->ns = gfc_current_ns;
787 gfc_find_sym_tree (name, gfc_current_ns, 0, &st);
789 st = gfc_get_unique_symtree (gfc_current_ns);
794 rc = gfc_get_symbol (name, gfc_current_ns->parent, result);
800 gfc_current_ns->refs++;
802 if (sym && !sym->gfc_new && gfc_current_state () != COMP_INTERFACE)
804 /* Trap another encompassed procedure with the same name. All
805 these conditions are necessary to avoid picking up an entry
806 whose name clashes with that of the encompassing procedure;
807 this is handled using gsymbols to register unique,globally
809 if (sym->attr.flavor != 0
810 && sym->attr.proc != 0
811 && (sym->attr.subroutine || sym->attr.function)
812 && sym->attr.if_source != IFSRC_UNKNOWN)
813 gfc_error_now ("Procedure '%s' at %C is already defined at %L",
814 name, &sym->declared_at);
816 /* Trap a procedure with a name the same as interface in the
817 encompassing scope. */
818 if (sym->attr.generic != 0
819 && (sym->attr.subroutine || sym->attr.function)
820 && !sym->attr.mod_proc)
821 gfc_error_now ("Name '%s' at %C is already defined"
822 " as a generic interface at %L",
823 name, &sym->declared_at);
825 /* Trap declarations of attributes in encompassing scope. The
826 signature for this is that ts.kind is set. Legitimate
827 references only set ts.type. */
828 if (sym->ts.kind != 0
829 && !sym->attr.implicit_type
830 && sym->attr.proc == 0
831 && gfc_current_ns->parent != NULL
832 && sym->attr.access == 0
833 && !module_fcn_entry)
834 gfc_error_now ("Procedure '%s' at %C has an explicit interface "
835 "and must not have attributes declared at %L",
836 name, &sym->declared_at);
839 if (gfc_current_ns->parent == NULL || *result == NULL)
842 /* Module function entries will already have a symtree in
843 the current namespace but will need one at module level. */
844 if (module_fcn_entry)
846 /* Present if entry is declared to be a module procedure. */
847 rc = gfc_find_sym_tree (name, gfc_current_ns->parent, 0, &st);
849 st = gfc_new_symtree (&gfc_current_ns->parent->sym_root, name);
852 st = gfc_new_symtree (&gfc_current_ns->sym_root, name);
857 /* See if the procedure should be a module procedure. */
859 if (((sym->ns->proc_name != NULL
860 && sym->ns->proc_name->attr.flavor == FL_MODULE
861 && sym->attr.proc != PROC_MODULE)
862 || (module_fcn_entry && sym->attr.proc != PROC_MODULE))
863 && gfc_add_procedure (&sym->attr, PROC_MODULE,
864 sym->name, NULL) == FAILURE)
871 /* Verify that the given symbol representing a parameter is C
872 interoperable, by checking to see if it was marked as such after
873 its declaration. If the given symbol is not interoperable, a
874 warning is reported, thus removing the need to return the status to
875 the calling function. The standard does not require the user use
876 one of the iso_c_binding named constants to declare an
877 interoperable parameter, but we can't be sure if the param is C
878 interop or not if the user doesn't. For example, integer(4) may be
879 legal Fortran, but doesn't have meaning in C. It may interop with
880 a number of the C types, which causes a problem because the
881 compiler can't know which one. This code is almost certainly not
882 portable, and the user will get what they deserve if the C type
883 across platforms isn't always interoperable with integer(4). If
884 the user had used something like integer(c_int) or integer(c_long),
885 the compiler could have automatically handled the varying sizes
889 verify_c_interop_param (gfc_symbol *sym)
891 int is_c_interop = 0;
892 gfc_try retval = SUCCESS;
894 /* We check implicitly typed variables in symbol.c:gfc_set_default_type().
895 Don't repeat the checks here. */
896 if (sym->attr.implicit_type)
899 /* For subroutines or functions that are passed to a BIND(C) procedure,
900 they're interoperable if they're BIND(C) and their params are all
902 if (sym->attr.flavor == FL_PROCEDURE)
904 if (sym->attr.is_bind_c == 0)
906 gfc_error_now ("Procedure '%s' at %L must have the BIND(C) "
907 "attribute to be C interoperable", sym->name,
908 &(sym->declared_at));
914 if (sym->attr.is_c_interop == 1)
915 /* We've already checked this procedure; don't check it again. */
918 return verify_bind_c_sym (sym, &(sym->ts), sym->attr.in_common,
923 /* See if we've stored a reference to a procedure that owns sym. */
924 if (sym->ns != NULL && sym->ns->proc_name != NULL)
926 if (sym->ns->proc_name->attr.is_bind_c == 1)
929 (verify_c_interop (&(sym->ts))
932 if (is_c_interop != 1)
934 /* Make personalized messages to give better feedback. */
935 if (sym->ts.type == BT_DERIVED)
936 gfc_error ("Type '%s' at %L is a parameter to the BIND(C) "
937 " procedure '%s' but is not C interoperable "
938 "because derived type '%s' is not C interoperable",
939 sym->name, &(sym->declared_at),
940 sym->ns->proc_name->name,
941 sym->ts.derived->name);
943 gfc_warning ("Variable '%s' at %L is a parameter to the "
944 "BIND(C) procedure '%s' but may not be C "
946 sym->name, &(sym->declared_at),
947 sym->ns->proc_name->name);
950 /* Character strings are only C interoperable if they have a
952 if (sym->ts.type == BT_CHARACTER)
954 gfc_charlen *cl = sym->ts.cl;
955 if (!cl || !cl->length || cl->length->expr_type != EXPR_CONSTANT
956 || mpz_cmp_si (cl->length->value.integer, 1) != 0)
958 gfc_error ("Character argument '%s' at %L "
959 "must be length 1 because "
960 "procedure '%s' is BIND(C)",
961 sym->name, &sym->declared_at,
962 sym->ns->proc_name->name);
967 /* We have to make sure that any param to a bind(c) routine does
968 not have the allocatable, pointer, or optional attributes,
969 according to J3/04-007, section 5.1. */
970 if (sym->attr.allocatable == 1)
972 gfc_error ("Variable '%s' at %L cannot have the "
973 "ALLOCATABLE attribute because procedure '%s'"
974 " is BIND(C)", sym->name, &(sym->declared_at),
975 sym->ns->proc_name->name);
979 if (sym->attr.pointer == 1)
981 gfc_error ("Variable '%s' at %L cannot have the "
982 "POINTER attribute because procedure '%s'"
983 " is BIND(C)", sym->name, &(sym->declared_at),
984 sym->ns->proc_name->name);
988 if (sym->attr.optional == 1)
990 gfc_error ("Variable '%s' at %L cannot have the "
991 "OPTIONAL attribute because procedure '%s'"
992 " is BIND(C)", sym->name, &(sym->declared_at),
993 sym->ns->proc_name->name);
997 /* Make sure that if it has the dimension attribute, that it is
998 either assumed size or explicit shape. */
1001 if (sym->as->type == AS_ASSUMED_SHAPE)
1003 gfc_error ("Assumed-shape array '%s' at %L cannot be an "
1004 "argument to the procedure '%s' at %L because "
1005 "the procedure is BIND(C)", sym->name,
1006 &(sym->declared_at), sym->ns->proc_name->name,
1007 &(sym->ns->proc_name->declared_at));
1011 if (sym->as->type == AS_DEFERRED)
1013 gfc_error ("Deferred-shape array '%s' at %L cannot be an "
1014 "argument to the procedure '%s' at %L because "
1015 "the procedure is BIND(C)", sym->name,
1016 &(sym->declared_at), sym->ns->proc_name->name,
1017 &(sym->ns->proc_name->declared_at));
1028 /* Function called by variable_decl() that adds a name to the symbol table. */
1031 build_sym (const char *name, gfc_charlen *cl,
1032 gfc_array_spec **as, locus *var_locus)
1034 symbol_attribute attr;
1037 if (gfc_get_symbol (name, NULL, &sym))
1040 /* Start updating the symbol table. Add basic type attribute if present. */
1041 if (current_ts.type != BT_UNKNOWN
1042 && (sym->attr.implicit_type == 0
1043 || !gfc_compare_types (&sym->ts, ¤t_ts))
1044 && gfc_add_type (sym, ¤t_ts, var_locus) == FAILURE)
1047 if (sym->ts.type == BT_CHARACTER)
1050 /* Add dimension attribute if present. */
1051 if (gfc_set_array_spec (sym, *as, var_locus) == FAILURE)
1055 /* Add attribute to symbol. The copy is so that we can reset the
1056 dimension attribute. */
1057 attr = current_attr;
1060 if (gfc_copy_attr (&sym->attr, &attr, var_locus) == FAILURE)
1063 /* Finish any work that may need to be done for the binding label,
1064 if it's a bind(c). The bind(c) attr is found before the symbol
1065 is made, and before the symbol name (for data decls), so the
1066 current_ts is holding the binding label, or nothing if the
1067 name= attr wasn't given. Therefore, test here if we're dealing
1068 with a bind(c) and make sure the binding label is set correctly. */
1069 if (sym->attr.is_bind_c == 1)
1071 if (sym->binding_label[0] == '\0')
1073 /* Set the binding label and verify that if a NAME= was specified
1074 then only one identifier was in the entity-decl-list. */
1075 if (set_binding_label (sym->binding_label, sym->name,
1076 num_idents_on_line) == FAILURE)
1081 /* See if we know we're in a common block, and if it's a bind(c)
1082 common then we need to make sure we're an interoperable type. */
1083 if (sym->attr.in_common == 1)
1085 /* Test the common block object. */
1086 if (sym->common_block != NULL && sym->common_block->is_bind_c == 1
1087 && sym->ts.is_c_interop != 1)
1089 gfc_error_now ("Variable '%s' in common block '%s' at %C "
1090 "must be declared with a C interoperable "
1091 "kind since common block '%s' is BIND(C)",
1092 sym->name, sym->common_block->name,
1093 sym->common_block->name);
1098 sym->attr.implied_index = 0;
1104 /* Set character constant to the given length. The constant will be padded or
1105 truncated. If we're inside an array constructor without a typespec, we
1106 additionally check that all elements have the same length; check_len -1
1107 means no checking. */
1110 gfc_set_constant_character_len (int len, gfc_expr *expr, int check_len)
1115 gcc_assert (expr->expr_type == EXPR_CONSTANT);
1116 gcc_assert (expr->ts.type == BT_CHARACTER);
1118 slen = expr->value.character.length;
1121 s = gfc_get_wide_string (len + 1);
1122 memcpy (s, expr->value.character.string,
1123 MIN (len, slen) * sizeof (gfc_char_t));
1125 gfc_wide_memset (&s[slen], ' ', len - slen);
1127 if (gfc_option.warn_character_truncation && slen > len)
1128 gfc_warning_now ("CHARACTER expression at %L is being truncated "
1129 "(%d/%d)", &expr->where, slen, len);
1131 /* Apply the standard by 'hand' otherwise it gets cleared for
1133 if (check_len != -1 && slen != check_len
1134 && !(gfc_option.allow_std & GFC_STD_GNU))
1135 gfc_error_now ("The CHARACTER elements of the array constructor "
1136 "at %L must have the same length (%d/%d)",
1137 &expr->where, slen, check_len);
1140 gfc_free (expr->value.character.string);
1141 expr->value.character.string = s;
1142 expr->value.character.length = len;
1147 /* Function to create and update the enumerator history
1148 using the information passed as arguments.
1149 Pointer "max_enum" is also updated, to point to
1150 enum history node containing largest initializer.
1152 SYM points to the symbol node of enumerator.
1153 INIT points to its enumerator value. */
1156 create_enum_history (gfc_symbol *sym, gfc_expr *init)
1158 enumerator_history *new_enum_history;
1159 gcc_assert (sym != NULL && init != NULL);
1161 new_enum_history = XCNEW (enumerator_history);
1163 new_enum_history->sym = sym;
1164 new_enum_history->initializer = init;
1165 new_enum_history->next = NULL;
1167 if (enum_history == NULL)
1169 enum_history = new_enum_history;
1170 max_enum = enum_history;
1174 new_enum_history->next = enum_history;
1175 enum_history = new_enum_history;
1177 if (mpz_cmp (max_enum->initializer->value.integer,
1178 new_enum_history->initializer->value.integer) < 0)
1179 max_enum = new_enum_history;
1184 /* Function to free enum kind history. */
1187 gfc_free_enum_history (void)
1189 enumerator_history *current = enum_history;
1190 enumerator_history *next;
1192 while (current != NULL)
1194 next = current->next;
1199 enum_history = NULL;
1203 /* Function called by variable_decl() that adds an initialization
1204 expression to a symbol. */
1207 add_init_expr_to_sym (const char *name, gfc_expr **initp, locus *var_locus)
1209 symbol_attribute attr;
1214 if (find_special (name, &sym, false))
1219 /* If this symbol is confirming an implicit parameter type,
1220 then an initialization expression is not allowed. */
1221 if (attr.flavor == FL_PARAMETER
1222 && sym->value != NULL
1225 gfc_error ("Initializer not allowed for PARAMETER '%s' at %C",
1232 /* An initializer is required for PARAMETER declarations. */
1233 if (attr.flavor == FL_PARAMETER)
1235 gfc_error ("PARAMETER at %L is missing an initializer", var_locus);
1241 /* If a variable appears in a DATA block, it cannot have an
1245 gfc_error ("Variable '%s' at %C with an initializer already "
1246 "appears in a DATA statement", sym->name);
1250 /* Check if the assignment can happen. This has to be put off
1251 until later for a derived type variable. */
1252 if (sym->ts.type != BT_DERIVED && init->ts.type != BT_DERIVED
1253 && gfc_check_assign_symbol (sym, init) == FAILURE)
1256 if (sym->ts.type == BT_CHARACTER && sym->ts.cl
1257 && init->ts.type == BT_CHARACTER)
1259 /* Update symbol character length according initializer. */
1260 if (gfc_check_assign_symbol (sym, init) == FAILURE)
1263 if (sym->ts.cl->length == NULL)
1266 /* If there are multiple CHARACTER variables declared on the
1267 same line, we don't want them to share the same length. */
1268 sym->ts.cl = gfc_new_charlen (gfc_current_ns);
1270 if (sym->attr.flavor == FL_PARAMETER)
1272 if (init->expr_type == EXPR_CONSTANT)
1274 clen = init->value.character.length;
1275 sym->ts.cl->length = gfc_int_expr (clen);
1277 else if (init->expr_type == EXPR_ARRAY)
1279 gfc_expr *p = init->value.constructor->expr;
1280 clen = p->value.character.length;
1281 sym->ts.cl->length = gfc_int_expr (clen);
1283 else if (init->ts.cl && init->ts.cl->length)
1284 sym->ts.cl->length =
1285 gfc_copy_expr (sym->value->ts.cl->length);
1288 /* Update initializer character length according symbol. */
1289 else if (sym->ts.cl->length->expr_type == EXPR_CONSTANT)
1291 int len = mpz_get_si (sym->ts.cl->length->value.integer);
1292 gfc_constructor * p;
1294 if (init->expr_type == EXPR_CONSTANT)
1295 gfc_set_constant_character_len (len, init, -1);
1296 else if (init->expr_type == EXPR_ARRAY)
1298 /* Build a new charlen to prevent simplification from
1299 deleting the length before it is resolved. */
1300 init->ts.cl = gfc_new_charlen (gfc_current_ns);
1301 init->ts.cl->length = gfc_copy_expr (sym->ts.cl->length);
1303 for (p = init->value.constructor; p; p = p->next)
1304 gfc_set_constant_character_len (len, p->expr, -1);
1309 /* Need to check if the expression we initialized this
1310 to was one of the iso_c_binding named constants. If so,
1311 and we're a parameter (constant), let it be iso_c.
1313 integer(c_int), parameter :: my_int = c_int
1314 integer(my_int) :: my_int_2
1315 If we mark my_int as iso_c (since we can see it's value
1316 is equal to one of the named constants), then my_int_2
1317 will be considered C interoperable. */
1318 if (sym->ts.type != BT_CHARACTER && sym->ts.type != BT_DERIVED)
1320 sym->ts.is_iso_c |= init->ts.is_iso_c;
1321 sym->ts.is_c_interop |= init->ts.is_c_interop;
1322 /* attr bits needed for module files. */
1323 sym->attr.is_iso_c |= init->ts.is_iso_c;
1324 sym->attr.is_c_interop |= init->ts.is_c_interop;
1325 if (init->ts.is_iso_c)
1326 sym->ts.f90_type = init->ts.f90_type;
1329 /* Add initializer. Make sure we keep the ranks sane. */
1330 if (sym->attr.dimension && init->rank == 0)
1336 if (sym->attr.flavor == FL_PARAMETER
1337 && init->expr_type == EXPR_CONSTANT
1338 && spec_size (sym->as, &size) == SUCCESS
1339 && mpz_cmp_si (size, 0) > 0)
1341 array = gfc_start_constructor (init->ts.type, init->ts.kind,
1344 array->value.constructor = c = NULL;
1345 for (n = 0; n < (int)mpz_get_si (size); n++)
1347 if (array->value.constructor == NULL)
1349 array->value.constructor = c = gfc_get_constructor ();
1354 c->next = gfc_get_constructor ();
1356 c->expr = gfc_copy_expr (init);
1360 array->shape = gfc_get_shape (sym->as->rank);
1361 for (n = 0; n < sym->as->rank; n++)
1362 spec_dimen_size (sym->as, n, &array->shape[n]);
1367 init->rank = sym->as->rank;
1371 if (sym->attr.save == SAVE_NONE)
1372 sym->attr.save = SAVE_IMPLICIT;
1380 /* Function called by variable_decl() that adds a name to a structure
1384 build_struct (const char *name, gfc_charlen *cl, gfc_expr **init,
1385 gfc_array_spec **as)
1389 /* If the current symbol is of the same derived type that we're
1390 constructing, it must have the pointer attribute. */
1391 if (current_ts.type == BT_DERIVED
1392 && current_ts.derived == gfc_current_block ()
1393 && current_attr.pointer == 0)
1395 gfc_error ("Component at %C must have the POINTER attribute");
1399 if (gfc_current_block ()->attr.pointer && (*as)->rank != 0)
1401 if ((*as)->type != AS_DEFERRED && (*as)->type != AS_EXPLICIT)
1403 gfc_error ("Array component of structure at %C must have explicit "
1404 "or deferred shape");
1409 if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE)
1414 c->attr = current_attr;
1416 c->initializer = *init;
1421 c->attr.dimension = 1;
1424 /* Should this ever get more complicated, combine with similar section
1425 in add_init_expr_to_sym into a separate function. */
1426 if (c->ts.type == BT_CHARACTER && !c->attr.pointer && c->initializer && c->ts.cl
1427 && c->ts.cl->length && c->ts.cl->length->expr_type == EXPR_CONSTANT)
1431 gcc_assert (c->ts.cl && c->ts.cl->length);
1432 gcc_assert (c->ts.cl->length->expr_type == EXPR_CONSTANT);
1433 gcc_assert (c->ts.cl->length->ts.type == BT_INTEGER);
1435 len = mpz_get_si (c->ts.cl->length->value.integer);
1437 if (c->initializer->expr_type == EXPR_CONSTANT)
1438 gfc_set_constant_character_len (len, c->initializer, -1);
1439 else if (mpz_cmp (c->ts.cl->length->value.integer,
1440 c->initializer->ts.cl->length->value.integer))
1443 gfc_constructor *ctor = c->initializer->value.constructor;
1445 has_ts = (c->initializer->ts.cl
1446 && c->initializer->ts.cl->length_from_typespec);
1452 /* Remember the length of the first element for checking
1453 that all elements *in the constructor* have the same
1454 length. This need not be the length of the LHS! */
1455 gcc_assert (ctor->expr->expr_type == EXPR_CONSTANT);
1456 gcc_assert (ctor->expr->ts.type == BT_CHARACTER);
1457 first_len = ctor->expr->value.character.length;
1459 for (; ctor; ctor = ctor->next)
1461 if (ctor->expr->expr_type == EXPR_CONSTANT)
1462 gfc_set_constant_character_len (len, ctor->expr,
1463 has_ts ? -1 : first_len);
1469 /* Check array components. */
1470 if (!c->attr.dimension)
1472 if (c->attr.allocatable)
1474 gfc_error ("Allocatable component at %C must be an array");
1481 if (c->attr.pointer)
1483 if (c->as->type != AS_DEFERRED)
1485 gfc_error ("Pointer array component of structure at %C must have a "
1490 else if (c->attr.allocatable)
1492 if (c->as->type != AS_DEFERRED)
1494 gfc_error ("Allocatable component of structure at %C must have a "
1501 if (c->as->type != AS_EXPLICIT)
1503 gfc_error ("Array component of structure at %C must have an "
1513 /* Match a 'NULL()', and possibly take care of some side effects. */
1516 gfc_match_null (gfc_expr **result)
1522 m = gfc_match (" null ( )");
1526 /* The NULL symbol now has to be/become an intrinsic function. */
1527 if (gfc_get_symbol ("null", NULL, &sym))
1529 gfc_error ("NULL() initialization at %C is ambiguous");
1533 gfc_intrinsic_symbol (sym);
1535 if (sym->attr.proc != PROC_INTRINSIC
1536 && (gfc_add_procedure (&sym->attr, PROC_INTRINSIC,
1537 sym->name, NULL) == FAILURE
1538 || gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE))
1541 e = gfc_get_expr ();
1542 e->where = gfc_current_locus;
1543 e->expr_type = EXPR_NULL;
1544 e->ts.type = BT_UNKNOWN;
1552 /* Match a variable name with an optional initializer. When this
1553 subroutine is called, a variable is expected to be parsed next.
1554 Depending on what is happening at the moment, updates either the
1555 symbol table or the current interface. */
1558 variable_decl (int elem)
1560 char name[GFC_MAX_SYMBOL_LEN + 1];
1561 gfc_expr *initializer, *char_len;
1563 gfc_array_spec *cp_as; /* Extra copy for Cray Pointees. */
1574 old_locus = gfc_current_locus;
1576 /* When we get here, we've just matched a list of attributes and
1577 maybe a type and a double colon. The next thing we expect to see
1578 is the name of the symbol. */
1579 m = gfc_match_name (name);
1583 var_locus = gfc_current_locus;
1585 /* Now we could see the optional array spec. or character length. */
1586 m = gfc_match_array_spec (&as);
1587 if (gfc_option.flag_cray_pointer && m == MATCH_YES)
1588 cp_as = gfc_copy_array_spec (as);
1589 else if (m == MATCH_ERROR)
1593 as = gfc_copy_array_spec (current_as);
1598 if (current_ts.type == BT_CHARACTER)
1600 switch (match_char_length (&char_len))
1603 cl = gfc_new_charlen (gfc_current_ns);
1605 cl->length = char_len;
1608 /* Non-constant lengths need to be copied after the first
1609 element. Also copy assumed lengths. */
1612 && (current_ts.cl->length == NULL
1613 || current_ts.cl->length->expr_type != EXPR_CONSTANT))
1615 cl = gfc_new_charlen (gfc_current_ns);
1616 cl->length = gfc_copy_expr (current_ts.cl->length);
1628 /* If this symbol has already shown up in a Cray Pointer declaration,
1629 then we want to set the type & bail out. */
1630 if (gfc_option.flag_cray_pointer)
1632 gfc_find_symbol (name, gfc_current_ns, 1, &sym);
1633 if (sym != NULL && sym->attr.cray_pointee)
1635 sym->ts.type = current_ts.type;
1636 sym->ts.kind = current_ts.kind;
1638 sym->ts.derived = current_ts.derived;
1639 sym->ts.is_c_interop = current_ts.is_c_interop;
1640 sym->ts.is_iso_c = current_ts.is_iso_c;
1643 /* Check to see if we have an array specification. */
1646 if (sym->as != NULL)
1648 gfc_error ("Duplicate array spec for Cray pointee at %C");
1649 gfc_free_array_spec (cp_as);
1655 if (gfc_set_array_spec (sym, cp_as, &var_locus) == FAILURE)
1656 gfc_internal_error ("Couldn't set pointee array spec.");
1658 /* Fix the array spec. */
1659 m = gfc_mod_pointee_as (sym->as);
1660 if (m == MATCH_ERROR)
1668 gfc_free_array_spec (cp_as);
1672 /* Procedure pointer as function result. */
1673 if (gfc_current_state () == COMP_FUNCTION
1674 && strcmp ("ppr@", gfc_current_block ()->name) == 0
1675 && strcmp (name, gfc_current_block ()->ns->proc_name->name) == 0)
1676 strcpy (name, "ppr@");
1678 if (gfc_current_state () == COMP_FUNCTION
1679 && strcmp (name, gfc_current_block ()->name) == 0
1680 && gfc_current_block ()->result
1681 && strcmp ("ppr@", gfc_current_block ()->result->name) == 0)
1682 strcpy (name, "ppr@");
1684 /* OK, we've successfully matched the declaration. Now put the
1685 symbol in the current namespace, because it might be used in the
1686 optional initialization expression for this symbol, e.g. this is
1689 integer, parameter :: i = huge(i)
1691 This is only true for parameters or variables of a basic type.
1692 For components of derived types, it is not true, so we don't
1693 create a symbol for those yet. If we fail to create the symbol,
1695 if (gfc_current_state () != COMP_DERIVED
1696 && build_sym (name, cl, &as, &var_locus) == FAILURE)
1702 /* An interface body specifies all of the procedure's
1703 characteristics and these shall be consistent with those
1704 specified in the procedure definition, except that the interface
1705 may specify a procedure that is not pure if the procedure is
1706 defined to be pure(12.3.2). */
1707 if (current_ts.type == BT_DERIVED
1708 && gfc_current_ns->proc_name
1709 && gfc_current_ns->proc_name->attr.if_source == IFSRC_IFBODY
1710 && current_ts.derived->ns != gfc_current_ns)
1713 st = gfc_find_symtree (gfc_current_ns->sym_root, current_ts.derived->name);
1714 if (!(current_ts.derived->attr.imported
1716 && st->n.sym == current_ts.derived)
1717 && !gfc_current_ns->has_import_set)
1719 gfc_error ("the type of '%s' at %C has not been declared within the "
1726 /* In functions that have a RESULT variable defined, the function
1727 name always refers to function calls. Therefore, the name is
1728 not allowed to appear in specification statements. */
1729 if (gfc_current_state () == COMP_FUNCTION
1730 && gfc_current_block () != NULL
1731 && gfc_current_block ()->result != NULL
1732 && gfc_current_block ()->result != gfc_current_block ()
1733 && strcmp (gfc_current_block ()->name, name) == 0)
1735 gfc_error ("Function name '%s' not allowed at %C", name);
1740 /* We allow old-style initializations of the form
1741 integer i /2/, j(4) /3*3, 1/
1742 (if no colon has been seen). These are different from data
1743 statements in that initializers are only allowed to apply to the
1744 variable immediately preceding, i.e.
1746 is not allowed. Therefore we have to do some work manually, that
1747 could otherwise be left to the matchers for DATA statements. */
1749 if (!colon_seen && gfc_match (" /") == MATCH_YES)
1751 if (gfc_notify_std (GFC_STD_GNU, "Extension: Old-style "
1752 "initialization at %C") == FAILURE)
1755 return match_old_style_init (name);
1758 /* The double colon must be present in order to have initializers.
1759 Otherwise the statement is ambiguous with an assignment statement. */
1762 if (gfc_match (" =>") == MATCH_YES)
1764 if (!current_attr.pointer)
1766 gfc_error ("Initialization at %C isn't for a pointer variable");
1771 m = gfc_match_null (&initializer);
1774 gfc_error ("Pointer initialization requires a NULL() at %C");
1778 if (gfc_pure (NULL))
1780 gfc_error ("Initialization of pointer at %C is not allowed in "
1781 "a PURE procedure");
1789 else if (gfc_match_char ('=') == MATCH_YES)
1791 if (current_attr.pointer)
1793 gfc_error ("Pointer initialization at %C requires '=>', "
1799 m = gfc_match_init_expr (&initializer);
1802 gfc_error ("Expected an initialization expression at %C");
1806 if (current_attr.flavor != FL_PARAMETER && gfc_pure (NULL))
1808 gfc_error ("Initialization of variable at %C is not allowed in "
1809 "a PURE procedure");
1818 if (initializer != NULL && current_attr.allocatable
1819 && gfc_current_state () == COMP_DERIVED)
1821 gfc_error ("Initialization of allocatable component at %C is not "
1827 /* Add the initializer. Note that it is fine if initializer is
1828 NULL here, because we sometimes also need to check if a
1829 declaration *must* have an initialization expression. */
1830 if (gfc_current_state () != COMP_DERIVED)
1831 t = add_init_expr_to_sym (name, &initializer, &var_locus);
1834 if (current_ts.type == BT_DERIVED
1835 && !current_attr.pointer && !initializer)
1836 initializer = gfc_default_initializer (¤t_ts);
1837 t = build_struct (name, cl, &initializer, &as);
1840 m = (t == SUCCESS) ? MATCH_YES : MATCH_ERROR;
1843 /* Free stuff up and return. */
1844 gfc_free_expr (initializer);
1845 gfc_free_array_spec (as);
1851 /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification.
1852 This assumes that the byte size is equal to the kind number for
1853 non-COMPLEX types, and equal to twice the kind number for COMPLEX. */
1856 gfc_match_old_kind_spec (gfc_typespec *ts)
1861 if (gfc_match_char ('*') != MATCH_YES)
1864 m = gfc_match_small_literal_int (&ts->kind, NULL);
1868 original_kind = ts->kind;
1870 /* Massage the kind numbers for complex types. */
1871 if (ts->type == BT_COMPLEX)
1875 gfc_error ("Old-style type declaration %s*%d not supported at %C",
1876 gfc_basic_typename (ts->type), original_kind);
1882 if (gfc_validate_kind (ts->type, ts->kind, true) < 0)
1884 gfc_error ("Old-style type declaration %s*%d not supported at %C",
1885 gfc_basic_typename (ts->type), original_kind);
1889 if (gfc_notify_std (GFC_STD_GNU, "Nonstandard type declaration %s*%d at %C",
1890 gfc_basic_typename (ts->type), original_kind) == FAILURE)
1897 /* Match a kind specification. Since kinds are generally optional, we
1898 usually return MATCH_NO if something goes wrong. If a "kind="
1899 string is found, then we know we have an error. */
1902 gfc_match_kind_spec (gfc_typespec *ts, bool kind_expr_only)
1914 where = loc = gfc_current_locus;
1919 if (gfc_match_char ('(') == MATCH_NO)
1922 /* Also gobbles optional text. */
1923 if (gfc_match (" kind = ") == MATCH_YES)
1926 loc = gfc_current_locus;
1929 n = gfc_match_init_expr (&e);
1933 if (gfc_matching_function)
1935 /* The function kind expression might include use associated or
1936 imported parameters and try again after the specification
1938 if (gfc_match_char (')') != MATCH_YES)
1940 gfc_error ("Missing right parenthesis at %C");
1946 gfc_undo_symbols ();
1951 /* ....or else, the match is real. */
1953 gfc_error ("Expected initialization expression at %C");
1961 gfc_error ("Expected scalar initialization expression at %C");
1966 msg = gfc_extract_int (e, &ts->kind);
1975 /* Before throwing away the expression, let's see if we had a
1976 C interoperable kind (and store the fact). */
1977 if (e->ts.is_c_interop == 1)
1979 /* Mark this as c interoperable if being declared with one
1980 of the named constants from iso_c_binding. */
1981 ts->is_c_interop = e->ts.is_iso_c;
1982 ts->f90_type = e->ts.f90_type;
1988 /* Ignore errors to this point, if we've gotten here. This means
1989 we ignore the m=MATCH_ERROR from above. */
1990 if (gfc_validate_kind (ts->type, ts->kind, true) < 0)
1992 gfc_error ("Kind %d not supported for type %s at %C", ts->kind,
1993 gfc_basic_typename (ts->type));
1994 gfc_current_locus = where;
1998 /* Warn if, e.g., c_int is used for a REAL variable, but not
1999 if, e.g., c_double is used for COMPLEX as the standard
2000 explicitly says that the kind type parameter for complex and real
2001 variable is the same, i.e. c_float == c_float_complex. */
2002 if (ts->f90_type != BT_UNKNOWN && ts->f90_type != ts->type
2003 && !((ts->f90_type == BT_REAL && ts->type == BT_COMPLEX)
2004 || (ts->f90_type == BT_COMPLEX && ts->type == BT_REAL)))
2005 gfc_warning_now ("C kind type parameter is for type %s but type at %L "
2006 "is %s", gfc_basic_typename (ts->f90_type), &where,
2007 gfc_basic_typename (ts->type));
2009 gfc_gobble_whitespace ();
2010 if ((c = gfc_next_ascii_char ()) != ')'
2011 && (ts->type != BT_CHARACTER || c != ','))
2013 if (ts->type == BT_CHARACTER)
2014 gfc_error ("Missing right parenthesis or comma at %C");
2016 gfc_error ("Missing right parenthesis at %C");
2020 /* All tests passed. */
2023 if(m == MATCH_ERROR)
2024 gfc_current_locus = where;
2026 /* Return what we know from the test(s). */
2031 gfc_current_locus = where;
2037 match_char_kind (int * kind, int * is_iso_c)
2046 where = gfc_current_locus;
2048 n = gfc_match_init_expr (&e);
2050 if (n != MATCH_YES && gfc_matching_function)
2052 /* The expression might include use-associated or imported
2053 parameters and try again after the specification
2056 gfc_undo_symbols ();
2061 gfc_error ("Expected initialization expression at %C");
2067 gfc_error ("Expected scalar initialization expression at %C");
2072 msg = gfc_extract_int (e, kind);
2073 *is_iso_c = e->ts.is_iso_c;
2083 /* Ignore errors to this point, if we've gotten here. This means
2084 we ignore the m=MATCH_ERROR from above. */
2085 if (gfc_validate_kind (BT_CHARACTER, *kind, true) < 0)
2087 gfc_error ("Kind %d is not supported for CHARACTER at %C", *kind);
2091 /* All tests passed. */
2094 if (m == MATCH_ERROR)
2095 gfc_current_locus = where;
2097 /* Return what we know from the test(s). */
2102 gfc_current_locus = where;
2106 /* Match the various kind/length specifications in a CHARACTER
2107 declaration. We don't return MATCH_NO. */
2110 match_char_spec (gfc_typespec *ts)
2112 int kind, seen_length, is_iso_c;
2122 /* Try the old-style specification first. */
2123 old_char_selector = 0;
2125 m = match_char_length (&len);
2129 old_char_selector = 1;
2134 m = gfc_match_char ('(');
2137 m = MATCH_YES; /* Character without length is a single char. */
2141 /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ). */
2142 if (gfc_match (" kind =") == MATCH_YES)
2144 m = match_char_kind (&kind, &is_iso_c);
2146 if (m == MATCH_ERROR)
2151 if (gfc_match (" , len =") == MATCH_NO)
2154 m = char_len_param_value (&len);
2157 if (m == MATCH_ERROR)
2164 /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>". */
2165 if (gfc_match (" len =") == MATCH_YES)
2167 m = char_len_param_value (&len);
2170 if (m == MATCH_ERROR)
2174 if (gfc_match_char (')') == MATCH_YES)
2177 if (gfc_match (" , kind =") != MATCH_YES)
2180 if (match_char_kind (&kind, &is_iso_c) == MATCH_ERROR)
2186 /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */
2187 m = char_len_param_value (&len);
2190 if (m == MATCH_ERROR)
2194 m = gfc_match_char (')');
2198 if (gfc_match_char (',') != MATCH_YES)
2201 gfc_match (" kind ="); /* Gobble optional text. */
2203 m = match_char_kind (&kind, &is_iso_c);
2204 if (m == MATCH_ERROR)
2210 /* Require a right-paren at this point. */
2211 m = gfc_match_char (')');
2216 gfc_error ("Syntax error in CHARACTER declaration at %C");
2218 gfc_free_expr (len);
2222 /* Deal with character functions after USE and IMPORT statements. */
2223 if (gfc_matching_function)
2225 gfc_free_expr (len);
2226 gfc_undo_symbols ();
2232 gfc_free_expr (len);
2236 /* Do some final massaging of the length values. */
2237 cl = gfc_new_charlen (gfc_current_ns);
2239 if (seen_length == 0)
2240 cl->length = gfc_int_expr (1);
2245 ts->kind = kind == 0 ? gfc_default_character_kind : kind;
2247 /* We have to know if it was a c interoperable kind so we can
2248 do accurate type checking of bind(c) procs, etc. */
2250 /* Mark this as c interoperable if being declared with one
2251 of the named constants from iso_c_binding. */
2252 ts->is_c_interop = is_iso_c;
2253 else if (len != NULL)
2254 /* Here, we might have parsed something such as: character(c_char)
2255 In this case, the parsing code above grabs the c_char when
2256 looking for the length (line 1690, roughly). it's the last
2257 testcase for parsing the kind params of a character variable.
2258 However, it's not actually the length. this seems like it
2260 To see if the user used a C interop kind, test the expr
2261 of the so called length, and see if it's C interoperable. */
2262 ts->is_c_interop = len->ts.is_iso_c;
2268 /* Matches a type specification. If successful, sets the ts structure
2269 to the matched specification. This is necessary for FUNCTION and
2270 IMPLICIT statements.
2272 If implicit_flag is nonzero, then we don't check for the optional
2273 kind specification. Not doing so is needed for matching an IMPLICIT
2274 statement correctly. */
2277 gfc_match_type_spec (gfc_typespec *ts, int implicit_flag)
2279 char name[GFC_MAX_SYMBOL_LEN + 1];
2283 bool seen_deferred_kind;
2285 /* A belt and braces check that the typespec is correctly being treated
2286 as a deferred characteristic association. */
2287 seen_deferred_kind = (gfc_current_state () == COMP_FUNCTION)
2288 && (gfc_current_block ()->result->ts.kind == -1)
2289 && (ts->kind == -1);
2291 if (seen_deferred_kind)
2294 /* Clear the current binding label, in case one is given. */
2295 curr_binding_label[0] = '\0';
2297 if (gfc_match (" byte") == MATCH_YES)
2299 if (gfc_notify_std(GFC_STD_GNU, "Extension: BYTE type at %C")
2303 if (gfc_validate_kind (BT_INTEGER, 1, true) < 0)
2305 gfc_error ("BYTE type used at %C "
2306 "is not available on the target machine");
2310 ts->type = BT_INTEGER;
2315 if (gfc_match (" integer") == MATCH_YES)
2317 ts->type = BT_INTEGER;
2318 ts->kind = gfc_default_integer_kind;
2322 if (gfc_match (" character") == MATCH_YES)
2324 ts->type = BT_CHARACTER;
2325 if (implicit_flag == 0)
2326 return match_char_spec (ts);
2331 if (gfc_match (" real") == MATCH_YES)
2334 ts->kind = gfc_default_real_kind;
2338 if (gfc_match (" double precision") == MATCH_YES)
2341 ts->kind = gfc_default_double_kind;
2345 if (gfc_match (" complex") == MATCH_YES)
2347 ts->type = BT_COMPLEX;
2348 ts->kind = gfc_default_complex_kind;
2352 if (gfc_match (" double complex") == MATCH_YES)
2354 if (gfc_notify_std (GFC_STD_GNU, "DOUBLE COMPLEX at %C does not "
2355 "conform to the Fortran 95 standard") == FAILURE)
2358 ts->type = BT_COMPLEX;
2359 ts->kind = gfc_default_double_kind;
2363 if (gfc_match (" logical") == MATCH_YES)
2365 ts->type = BT_LOGICAL;
2366 ts->kind = gfc_default_logical_kind;
2370 m = gfc_match (" type ( %n )", name);
2373 m = gfc_match (" class ( %n )", name);
2378 /* TODO: Implement Polymorphism. */
2379 gfc_warning ("Polymorphic entities are not yet implemented. "
2380 "CLASS will be treated like TYPE at %C");
2383 ts->type = BT_DERIVED;
2385 /* Defer association of the derived type until the end of the
2386 specification block. However, if the derived type can be
2387 found, add it to the typespec. */
2388 if (gfc_matching_function)
2391 if (gfc_current_state () != COMP_INTERFACE
2392 && !gfc_find_symbol (name, NULL, 1, &sym) && sym)
2397 /* Search for the name but allow the components to be defined later. If
2398 type = -1, this typespec has been seen in a function declaration but
2399 the type could not be accessed at that point. */
2401 if (ts->kind != -1 && gfc_get_ha_symbol (name, &sym))
2403 gfc_error ("Type name '%s' at %C is ambiguous", name);
2406 else if (ts->kind == -1)
2408 int iface = gfc_state_stack->previous->state != COMP_INTERFACE
2409 || gfc_current_ns->has_import_set;
2410 if (gfc_find_symbol (name, NULL, iface, &sym))
2412 gfc_error ("Type name '%s' at %C is ambiguous", name);
2421 if (sym->attr.flavor != FL_DERIVED
2422 && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE)
2425 gfc_set_sym_referenced (sym);
2431 /* For all types except double, derived and character, look for an
2432 optional kind specifier. MATCH_NO is actually OK at this point. */
2433 if (implicit_flag == 1)
2436 if (gfc_current_form == FORM_FREE)
2438 c = gfc_peek_ascii_char();
2439 if (!gfc_is_whitespace(c) && c != '*' && c != '('
2440 && c != ':' && c != ',')
2444 m = gfc_match_kind_spec (ts, false);
2445 if (m == MATCH_NO && ts->type != BT_CHARACTER)
2446 m = gfc_match_old_kind_spec (ts);
2448 /* Defer association of the KIND expression of function results
2449 until after USE and IMPORT statements. */
2450 if ((gfc_current_state () == COMP_NONE && gfc_error_flag_test ())
2451 || gfc_matching_function)
2455 m = MATCH_YES; /* No kind specifier found. */
2461 /* Match an IMPLICIT NONE statement. Actually, this statement is
2462 already matched in parse.c, or we would not end up here in the
2463 first place. So the only thing we need to check, is if there is
2464 trailing garbage. If not, the match is successful. */
2467 gfc_match_implicit_none (void)
2469 return (gfc_match_eos () == MATCH_YES) ? MATCH_YES : MATCH_NO;
2473 /* Match the letter range(s) of an IMPLICIT statement. */
2476 match_implicit_range (void)
2482 cur_loc = gfc_current_locus;
2484 gfc_gobble_whitespace ();
2485 c = gfc_next_ascii_char ();
2488 gfc_error ("Missing character range in IMPLICIT at %C");
2495 gfc_gobble_whitespace ();
2496 c1 = gfc_next_ascii_char ();
2500 gfc_gobble_whitespace ();
2501 c = gfc_next_ascii_char ();
2506 inner = 0; /* Fall through. */
2513 gfc_gobble_whitespace ();
2514 c2 = gfc_next_ascii_char ();
2518 gfc_gobble_whitespace ();
2519 c = gfc_next_ascii_char ();
2521 if ((c != ',') && (c != ')'))
2534 gfc_error ("Letters must be in alphabetic order in "
2535 "IMPLICIT statement at %C");
2539 /* See if we can add the newly matched range to the pending
2540 implicits from this IMPLICIT statement. We do not check for
2541 conflicts with whatever earlier IMPLICIT statements may have
2542 set. This is done when we've successfully finished matching
2544 if (gfc_add_new_implicit_range (c1, c2) != SUCCESS)
2551 gfc_syntax_error (ST_IMPLICIT);
2553 gfc_current_locus = cur_loc;
2558 /* Match an IMPLICIT statement, storing the types for
2559 gfc_set_implicit() if the statement is accepted by the parser.
2560 There is a strange looking, but legal syntactic construction
2561 possible. It looks like:
2563 IMPLICIT INTEGER (a-b) (c-d)
2565 This is legal if "a-b" is a constant expression that happens to
2566 equal one of the legal kinds for integers. The real problem
2567 happens with an implicit specification that looks like:
2569 IMPLICIT INTEGER (a-b)
2571 In this case, a typespec matcher that is "greedy" (as most of the
2572 matchers are) gobbles the character range as a kindspec, leaving
2573 nothing left. We therefore have to go a bit more slowly in the
2574 matching process by inhibiting the kindspec checking during
2575 typespec matching and checking for a kind later. */
2578 gfc_match_implicit (void)
2587 /* We don't allow empty implicit statements. */
2588 if (gfc_match_eos () == MATCH_YES)
2590 gfc_error ("Empty IMPLICIT statement at %C");
2596 /* First cleanup. */
2597 gfc_clear_new_implicit ();
2599 /* A basic type is mandatory here. */
2600 m = gfc_match_type_spec (&ts, 1);
2601 if (m == MATCH_ERROR)
2606 cur_loc = gfc_current_locus;
2607 m = match_implicit_range ();
2611 /* We may have <TYPE> (<RANGE>). */
2612 gfc_gobble_whitespace ();
2613 c = gfc_next_ascii_char ();
2614 if ((c == '\n') || (c == ','))
2616 /* Check for CHARACTER with no length parameter. */
2617 if (ts.type == BT_CHARACTER && !ts.cl)
2619 ts.kind = gfc_default_character_kind;
2620 ts.cl = gfc_new_charlen (gfc_current_ns);
2621 ts.cl->length = gfc_int_expr (1);
2624 /* Record the Successful match. */
2625 if (gfc_merge_new_implicit (&ts) != SUCCESS)
2630 gfc_current_locus = cur_loc;
2633 /* Discard the (incorrectly) matched range. */
2634 gfc_clear_new_implicit ();
2636 /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */
2637 if (ts.type == BT_CHARACTER)
2638 m = match_char_spec (&ts);
2641 m = gfc_match_kind_spec (&ts, false);
2644 m = gfc_match_old_kind_spec (&ts);
2645 if (m == MATCH_ERROR)
2651 if (m == MATCH_ERROR)
2654 m = match_implicit_range ();
2655 if (m == MATCH_ERROR)
2660 gfc_gobble_whitespace ();
2661 c = gfc_next_ascii_char ();
2662 if ((c != '\n') && (c != ','))
2665 if (gfc_merge_new_implicit (&ts) != SUCCESS)
2673 gfc_syntax_error (ST_IMPLICIT);
2681 gfc_match_import (void)
2683 char name[GFC_MAX_SYMBOL_LEN + 1];
2688 if (gfc_current_ns->proc_name == NULL
2689 || gfc_current_ns->proc_name->attr.if_source != IFSRC_IFBODY)
2691 gfc_error ("IMPORT statement at %C only permitted in "
2692 "an INTERFACE body");
2696 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IMPORT statement at %C")
2700 if (gfc_match_eos () == MATCH_YES)
2702 /* All host variables should be imported. */
2703 gfc_current_ns->has_import_set = 1;
2707 if (gfc_match (" ::") == MATCH_YES)
2709 if (gfc_match_eos () == MATCH_YES)
2711 gfc_error ("Expecting list of named entities at %C");
2718 m = gfc_match (" %n", name);
2722 if (gfc_current_ns->parent != NULL
2723 && gfc_find_symbol (name, gfc_current_ns->parent, 1, &sym))
2725 gfc_error ("Type name '%s' at %C is ambiguous", name);
2728 else if (gfc_current_ns->proc_name->ns->parent != NULL
2729 && gfc_find_symbol (name,
2730 gfc_current_ns->proc_name->ns->parent,
2733 gfc_error ("Type name '%s' at %C is ambiguous", name);
2739 gfc_error ("Cannot IMPORT '%s' from host scoping unit "
2740 "at %C - does not exist.", name);
2744 if (gfc_find_symtree (gfc_current_ns->sym_root,name))
2746 gfc_warning ("'%s' is already IMPORTed from host scoping unit "
2751 st = gfc_new_symtree (&gfc_current_ns->sym_root, sym->name);
2754 sym->attr.imported = 1;
2766 if (gfc_match_eos () == MATCH_YES)
2768 if (gfc_match_char (',') != MATCH_YES)
2775 gfc_error ("Syntax error in IMPORT statement at %C");
2780 /* A minimal implementation of gfc_match without whitespace, escape
2781 characters or variable arguments. Returns true if the next
2782 characters match the TARGET template exactly. */
2785 match_string_p (const char *target)
2789 for (p = target; *p; p++)
2790 if ((char) gfc_next_ascii_char () != *p)
2795 /* Matches an attribute specification including array specs. If
2796 successful, leaves the variables current_attr and current_as
2797 holding the specification. Also sets the colon_seen variable for
2798 later use by matchers associated with initializations.
2800 This subroutine is a little tricky in the sense that we don't know
2801 if we really have an attr-spec until we hit the double colon.
2802 Until that time, we can only return MATCH_NO. This forces us to
2803 check for duplicate specification at this level. */
2806 match_attr_spec (void)
2808 /* Modifiers that can exist in a type statement. */
2810 { GFC_DECL_BEGIN = 0,
2811 DECL_ALLOCATABLE = GFC_DECL_BEGIN, DECL_DIMENSION, DECL_EXTERNAL,
2812 DECL_IN, DECL_OUT, DECL_INOUT, DECL_INTRINSIC, DECL_OPTIONAL,
2813 DECL_PARAMETER, DECL_POINTER, DECL_PROTECTED, DECL_PRIVATE,
2814 DECL_PUBLIC, DECL_SAVE, DECL_TARGET, DECL_VALUE, DECL_VOLATILE,
2815 DECL_IS_BIND_C, DECL_NONE,
2816 GFC_DECL_END /* Sentinel */
2820 /* GFC_DECL_END is the sentinel, index starts at 0. */
2821 #define NUM_DECL GFC_DECL_END
2823 locus start, seen_at[NUM_DECL];
2830 gfc_clear_attr (¤t_attr);
2831 start = gfc_current_locus;
2836 /* See if we get all of the keywords up to the final double colon. */
2837 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
2845 gfc_gobble_whitespace ();
2847 ch = gfc_next_ascii_char ();
2850 /* This is the successful exit condition for the loop. */
2851 if (gfc_next_ascii_char () == ':')
2856 gfc_gobble_whitespace ();
2857 switch (gfc_peek_ascii_char ())
2860 if (match_string_p ("allocatable"))
2861 d = DECL_ALLOCATABLE;
2865 /* Try and match the bind(c). */
2866 m = gfc_match_bind_c (NULL, true);
2869 else if (m == MATCH_ERROR)
2874 if (match_string_p ("dimension"))
2879 if (match_string_p ("external"))
2884 if (match_string_p ("int"))
2886 ch = gfc_next_ascii_char ();
2889 if (match_string_p ("nt"))
2891 /* Matched "intent". */
2892 /* TODO: Call match_intent_spec from here. */
2893 if (gfc_match (" ( in out )") == MATCH_YES)
2895 else if (gfc_match (" ( in )") == MATCH_YES)
2897 else if (gfc_match (" ( out )") == MATCH_YES)
2903 if (match_string_p ("insic"))
2905 /* Matched "intrinsic". */
2913 if (match_string_p ("optional"))
2918 gfc_next_ascii_char ();
2919 switch (gfc_next_ascii_char ())
2922 if (match_string_p ("rameter"))
2924 /* Matched "parameter". */
2930 if (match_string_p ("inter"))
2932 /* Matched "pointer". */
2938 ch = gfc_next_ascii_char ();
2941 if (match_string_p ("vate"))
2943 /* Matched "private". */
2949 if (match_string_p ("tected"))
2951 /* Matched "protected". */
2958 if (match_string_p ("blic"))
2960 /* Matched "public". */
2968 if (match_string_p ("save"))
2973 if (match_string_p ("target"))
2978 gfc_next_ascii_char ();
2979 ch = gfc_next_ascii_char ();
2982 if (match_string_p ("lue"))
2984 /* Matched "value". */
2990 if (match_string_p ("latile"))
2992 /* Matched "volatile". */
3000 /* No double colon and no recognizable decl_type, so assume that
3001 we've been looking at something else the whole time. */
3008 /* Check to make sure any parens are paired up correctly. */
3009 if (gfc_match_parens () == MATCH_ERROR)
3016 seen_at[d] = gfc_current_locus;
3018 if (d == DECL_DIMENSION)
3020 m = gfc_match_array_spec (¤t_as);
3024 gfc_error ("Missing dimension specification at %C");
3028 if (m == MATCH_ERROR)
3033 /* Since we've seen a double colon, we have to be looking at an
3034 attr-spec. This means that we can now issue errors. */
3035 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
3040 case DECL_ALLOCATABLE:
3041 attr = "ALLOCATABLE";
3043 case DECL_DIMENSION:
3050 attr = "INTENT (IN)";
3053 attr = "INTENT (OUT)";
3056 attr = "INTENT (IN OUT)";
3058 case DECL_INTRINSIC:
3064 case DECL_PARAMETER:
3070 case DECL_PROTECTED:
3085 case DECL_IS_BIND_C:
3095 attr = NULL; /* This shouldn't happen. */
3098 gfc_error ("Duplicate %s attribute at %L", attr, &seen_at[d]);
3103 /* Now that we've dealt with duplicate attributes, add the attributes
3104 to the current attribute. */
3105 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
3110 if (gfc_current_state () == COMP_DERIVED
3111 && d != DECL_DIMENSION && d != DECL_POINTER
3112 && d != DECL_PRIVATE && d != DECL_PUBLIC
3115 if (d == DECL_ALLOCATABLE)
3117 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ALLOCATABLE "
3118 "attribute at %C in a TYPE definition")
3127 gfc_error ("Attribute at %L is not allowed in a TYPE definition",
3134 if ((d == DECL_PRIVATE || d == DECL_PUBLIC)
3135 && gfc_current_state () != COMP_MODULE)
3137 if (d == DECL_PRIVATE)
3141 if (gfc_current_state () == COMP_DERIVED
3142 && gfc_state_stack->previous
3143 && gfc_state_stack->previous->state == COMP_MODULE)
3145 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Attribute %s "
3146 "at %L in a TYPE definition", attr,
3156 gfc_error ("%s attribute at %L is not allowed outside of the "
3157 "specification part of a module", attr, &seen_at[d]);
3165 case DECL_ALLOCATABLE:
3166 t = gfc_add_allocatable (¤t_attr, &seen_at[d]);
3169 case DECL_DIMENSION:
3170 t = gfc_add_dimension (¤t_attr, NULL, &seen_at[d]);
3174 t = gfc_add_external (¤t_attr, &seen_at[d]);
3178 t = gfc_add_intent (¤t_attr, INTENT_IN, &seen_at[d]);
3182 t = gfc_add_intent (¤t_attr, INTENT_OUT, &seen_at[d]);
3186 t = gfc_add_intent (¤t_attr, INTENT_INOUT, &seen_at[d]);
3189 case DECL_INTRINSIC:
3190 t = gfc_add_intrinsic (¤t_attr, &seen_at[d]);
3194 t = gfc_add_optional (¤t_attr, &seen_at[d]);
3197 case DECL_PARAMETER:
3198 t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, &seen_at[d]);
3202 t = gfc_add_pointer (¤t_attr, &seen_at[d]);
3205 case DECL_PROTECTED:
3206 if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE)
3208 gfc_error ("PROTECTED at %C only allowed in specification "
3209 "part of a module");
3214 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED "
3219 t = gfc_add_protected (¤t_attr, NULL, &seen_at[d]);
3223 t = gfc_add_access (¤t_attr, ACCESS_PRIVATE, NULL,
3228 t = gfc_add_access (¤t_attr, ACCESS_PUBLIC, NULL,
3233 t = gfc_add_save (¤t_attr, NULL, &seen_at[d]);
3237 t = gfc_add_target (¤t_attr, &seen_at[d]);
3240 case DECL_IS_BIND_C:
3241 t = gfc_add_is_bind_c(¤t_attr, NULL, &seen_at[d], 0);
3245 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE attribute "
3250 t = gfc_add_value (¤t_attr, NULL, &seen_at[d]);
3254 if (gfc_notify_std (GFC_STD_F2003,
3255 "Fortran 2003: VOLATILE attribute at %C")
3259 t = gfc_add_volatile (¤t_attr, NULL, &seen_at[d]);
3263 gfc_internal_error ("match_attr_spec(): Bad attribute");
3277 gfc_current_locus = start;
3278 gfc_free_array_spec (current_as);
3284 /* Set the binding label, dest_label, either with the binding label
3285 stored in the given gfc_typespec, ts, or if none was provided, it
3286 will be the symbol name in all lower case, as required by the draft
3287 (J3/04-007, section 15.4.1). If a binding label was given and
3288 there is more than one argument (num_idents), it is an error. */
3291 set_binding_label (char *dest_label, const char *sym_name, int num_idents)
3293 if (num_idents > 1 && has_name_equals)
3295 gfc_error ("Multiple identifiers provided with "
3296 "single NAME= specifier at %C");
3300 if (curr_binding_label[0] != '\0')
3302 /* Binding label given; store in temp holder til have sym. */
3303 strcpy (dest_label, curr_binding_label);
3307 /* No binding label given, and the NAME= specifier did not exist,
3308 which means there was no NAME="". */
3309 if (sym_name != NULL && has_name_equals == 0)
3310 strcpy (dest_label, sym_name);
3317 /* Set the status of the given common block as being BIND(C) or not,
3318 depending on the given parameter, is_bind_c. */
3321 set_com_block_bind_c (gfc_common_head *com_block, int is_bind_c)
3323 com_block->is_bind_c = is_bind_c;
3328 /* Verify that the given gfc_typespec is for a C interoperable type. */
3331 verify_c_interop (gfc_typespec *ts)
3333 if (ts->type == BT_DERIVED && ts->derived != NULL)
3334 return (ts->derived->ts.is_c_interop ? SUCCESS : FAILURE);
3335 else if (ts->is_c_interop != 1)
3342 /* Verify that the variables of a given common block, which has been
3343 defined with the attribute specifier bind(c), to be of a C
3344 interoperable type. Errors will be reported here, if
3348 verify_com_block_vars_c_interop (gfc_common_head *com_block)
3350 gfc_symbol *curr_sym = NULL;
3351 gfc_try retval = SUCCESS;
3353 curr_sym = com_block->head;
3355 /* Make sure we have at least one symbol. */
3356 if (curr_sym == NULL)
3359 /* Here we know we have a symbol, so we'll execute this loop
3363 /* The second to last param, 1, says this is in a common block. */
3364 retval = verify_bind_c_sym (curr_sym, &(curr_sym->ts), 1, com_block);
3365 curr_sym = curr_sym->common_next;
3366 } while (curr_sym != NULL);
3372 /* Verify that a given BIND(C) symbol is C interoperable. If it is not,
3373 an appropriate error message is reported. */
3376 verify_bind_c_sym (gfc_symbol *tmp_sym, gfc_typespec *ts,
3377 int is_in_common, gfc_common_head *com_block)
3379 bool bind_c_function = false;
3380 gfc_try retval = SUCCESS;
3382 if (tmp_sym->attr.function && tmp_sym->attr.is_bind_c)
3383 bind_c_function = true;
3385 if (tmp_sym->attr.function && tmp_sym->result != NULL)
3387 tmp_sym = tmp_sym->result;
3388 /* Make sure it wasn't an implicitly typed result. */
3389 if (tmp_sym->attr.implicit_type)
3391 gfc_warning ("Implicitly declared BIND(C) function '%s' at "
3392 "%L may not be C interoperable", tmp_sym->name,
3393 &tmp_sym->declared_at);
3394 tmp_sym->ts.f90_type = tmp_sym->ts.type;
3395 /* Mark it as C interoperable to prevent duplicate warnings. */
3396 tmp_sym->ts.is_c_interop = 1;
3397 tmp_sym->attr.is_c_interop = 1;
3401 /* Here, we know we have the bind(c) attribute, so if we have
3402 enough type info, then verify that it's a C interop kind.
3403 The info could be in the symbol already, or possibly still in
3404 the given ts (current_ts), so look in both. */
3405 if (tmp_sym->ts.type != BT_UNKNOWN || ts->type != BT_UNKNOWN)
3407 if (verify_c_interop (&(tmp_sym->ts)) != SUCCESS)
3409 /* See if we're dealing with a sym in a common block or not. */
3410 if (is_in_common == 1)
3412 gfc_warning ("Variable '%s' in common block '%s' at %L "
3413 "may not be a C interoperable "
3414 "kind though common block '%s' is BIND(C)",
3415 tmp_sym->name, com_block->name,
3416 &(tmp_sym->declared_at), com_block->name);
3420 if (tmp_sym->ts.type == BT_DERIVED || ts->type == BT_DERIVED)
3421 gfc_error ("Type declaration '%s' at %L is not C "
3422 "interoperable but it is BIND(C)",
3423 tmp_sym->name, &(tmp_sym->declared_at));
3425 gfc_warning ("Variable '%s' at %L "
3426 "may not be a C interoperable "
3427 "kind but it is bind(c)",
3428 tmp_sym->name, &(tmp_sym->declared_at));
3432 /* Variables declared w/in a common block can't be bind(c)
3433 since there's no way for C to see these variables, so there's
3434 semantically no reason for the attribute. */
3435 if (is_in_common == 1 && tmp_sym->attr.is_bind_c == 1)
3437 gfc_error ("Variable '%s' in common block '%s' at "
3438 "%L cannot be declared with BIND(C) "
3439 "since it is not a global",
3440 tmp_sym->name, com_block->name,
3441 &(tmp_sym->declared_at));
3445 /* Scalar variables that are bind(c) can not have the pointer
3446 or allocatable attributes. */
3447 if (tmp_sym->attr.is_bind_c == 1)
3449 if (tmp_sym->attr.pointer == 1)
3451 gfc_error ("Variable '%s' at %L cannot have both the "
3452 "POINTER and BIND(C) attributes",
3453 tmp_sym->name, &(tmp_sym->declared_at));
3457 if (tmp_sym->attr.allocatable == 1)
3459 gfc_error ("Variable '%s' at %L cannot have both the "
3460 "ALLOCATABLE and BIND(C) attributes",
3461 tmp_sym->name, &(tmp_sym->declared_at));
3467 /* If it is a BIND(C) function, make sure the return value is a
3468 scalar value. The previous tests in this function made sure
3469 the type is interoperable. */
3470 if (bind_c_function && tmp_sym->as != NULL)
3471 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3472 "be an array", tmp_sym->name, &(tmp_sym->declared_at));
3474 /* BIND(C) functions can not return a character string. */
3475 if (bind_c_function && tmp_sym->ts.type == BT_CHARACTER)
3476 if (tmp_sym->ts.cl == NULL || tmp_sym->ts.cl->length == NULL
3477 || tmp_sym->ts.cl->length->expr_type != EXPR_CONSTANT
3478 || mpz_cmp_si (tmp_sym->ts.cl->length->value.integer, 1) != 0)
3479 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3480 "be a character string", tmp_sym->name,
3481 &(tmp_sym->declared_at));
3484 /* See if the symbol has been marked as private. If it has, make sure
3485 there is no binding label and warn the user if there is one. */
3486 if (tmp_sym->attr.access == ACCESS_PRIVATE
3487 && tmp_sym->binding_label[0] != '\0')
3488 /* Use gfc_warning_now because we won't say that the symbol fails
3489 just because of this. */
3490 gfc_warning_now ("Symbol '%s' at %L is marked PRIVATE but has been "
3491 "given the binding label '%s'", tmp_sym->name,
3492 &(tmp_sym->declared_at), tmp_sym->binding_label);
3498 /* Set the appropriate fields for a symbol that's been declared as
3499 BIND(C) (the is_bind_c flag and the binding label), and verify that
3500 the type is C interoperable. Errors are reported by the functions
3501 used to set/test these fields. */
3504 set_verify_bind_c_sym (gfc_symbol *tmp_sym, int num_idents)
3506 gfc_try retval = SUCCESS;
3508 /* TODO: Do we need to make sure the vars aren't marked private? */
3510 /* Set the is_bind_c bit in symbol_attribute. */
3511 gfc_add_is_bind_c (&(tmp_sym->attr), tmp_sym->name, &gfc_current_locus, 0);
3513 if (set_binding_label (tmp_sym->binding_label, tmp_sym->name,
3514 num_idents) != SUCCESS)
3521 /* Set the fields marking the given common block as BIND(C), including
3522 a binding label, and report any errors encountered. */
3525 set_verify_bind_c_com_block (gfc_common_head *com_block, int num_idents)
3527 gfc_try retval = SUCCESS;
3529 /* destLabel, common name, typespec (which may have binding label). */
3530 if (set_binding_label (com_block->binding_label, com_block->name, num_idents)
3534 /* Set the given common block (com_block) to being bind(c) (1). */
3535 set_com_block_bind_c (com_block, 1);
3541 /* Retrieve the list of one or more identifiers that the given bind(c)
3542 attribute applies to. */
3545 get_bind_c_idents (void)
3547 char name[GFC_MAX_SYMBOL_LEN + 1];
3549 gfc_symbol *tmp_sym = NULL;
3551 gfc_common_head *com_block = NULL;
3553 if (gfc_match_name (name) == MATCH_YES)
3555 found_id = MATCH_YES;
3556 gfc_get_ha_symbol (name, &tmp_sym);
3558 else if (match_common_name (name) == MATCH_YES)
3560 found_id = MATCH_YES;
3561 com_block = gfc_get_common (name, 0);
3565 gfc_error ("Need either entity or common block name for "
3566 "attribute specification statement at %C");
3570 /* Save the current identifier and look for more. */
3573 /* Increment the number of identifiers found for this spec stmt. */
3576 /* Make sure we have a sym or com block, and verify that it can
3577 be bind(c). Set the appropriate field(s) and look for more
3579 if (tmp_sym != NULL || com_block != NULL)
3581 if (tmp_sym != NULL)
3583 if (set_verify_bind_c_sym (tmp_sym, num_idents)
3589 if (set_verify_bind_c_com_block(com_block, num_idents)
3594 /* Look to see if we have another identifier. */
3596 if (gfc_match_eos () == MATCH_YES)
3597 found_id = MATCH_NO;
3598 else if (gfc_match_char (',') != MATCH_YES)
3599 found_id = MATCH_NO;
3600 else if (gfc_match_name (name) == MATCH_YES)
3602 found_id = MATCH_YES;
3603 gfc_get_ha_symbol (name, &tmp_sym);
3605 else if (match_common_name (name) == MATCH_YES)
3607 found_id = MATCH_YES;
3608 com_block = gfc_get_common (name, 0);
3612 gfc_error ("Missing entity or common block name for "
3613 "attribute specification statement at %C");
3619 gfc_internal_error ("Missing symbol");
3621 } while (found_id == MATCH_YES);
3623 /* if we get here we were successful */
3628 /* Try and match a BIND(C) attribute specification statement. */
3631 gfc_match_bind_c_stmt (void)
3633 match found_match = MATCH_NO;
3638 /* This may not be necessary. */
3640 /* Clear the temporary binding label holder. */
3641 curr_binding_label[0] = '\0';
3643 /* Look for the bind(c). */
3644 found_match = gfc_match_bind_c (NULL, true);
3646 if (found_match == MATCH_YES)
3648 /* Look for the :: now, but it is not required. */
3651 /* Get the identifier(s) that needs to be updated. This may need to
3652 change to hand the flag(s) for the attr specified so all identifiers
3653 found can have all appropriate parts updated (assuming that the same
3654 spec stmt can have multiple attrs, such as both bind(c) and
3656 if (get_bind_c_idents () != SUCCESS)
3657 /* Error message should have printed already. */
3665 /* Match a data declaration statement. */
3668 gfc_match_data_decl (void)
3674 num_idents_on_line = 0;
3676 m = gfc_match_type_spec (¤t_ts, 0);
3680 if (current_ts.type == BT_DERIVED && gfc_current_state () != COMP_DERIVED)
3682 sym = gfc_use_derived (current_ts.derived);
3690 current_ts.derived = sym;
3693 m = match_attr_spec ();
3694 if (m == MATCH_ERROR)
3700 if (current_ts.type == BT_DERIVED && current_ts.derived->components == NULL
3701 && !current_ts.derived->attr.zero_comp)
3704 if (current_attr.pointer && gfc_current_state () == COMP_DERIVED)
3707 gfc_find_symbol (current_ts.derived->name,
3708 current_ts.derived->ns->parent, 1, &sym);
3710 /* Any symbol that we find had better be a type definition
3711 which has its components defined. */
3712 if (sym != NULL && sym->attr.flavor == FL_DERIVED
3713 && (current_ts.derived->components != NULL
3714 || current_ts.derived->attr.zero_comp))
3717 /* Now we have an error, which we signal, and then fix up
3718 because the knock-on is plain and simple confusing. */
3719 gfc_error_now ("Derived type at %C has not been previously defined "
3720 "and so cannot appear in a derived type definition");
3721 current_attr.pointer = 1;
3726 /* If we have an old-style character declaration, and no new-style
3727 attribute specifications, then there a comma is optional between
3728 the type specification and the variable list. */
3729 if (m == MATCH_NO && current_ts.type == BT_CHARACTER && old_char_selector)
3730 gfc_match_char (',');
3732 /* Give the types/attributes to symbols that follow. Give the element
3733 a number so that repeat character length expressions can be copied. */
3737 num_idents_on_line++;
3738 m = variable_decl (elem++);
3739 if (m == MATCH_ERROR)
3744 if (gfc_match_eos () == MATCH_YES)
3746 if (gfc_match_char (',') != MATCH_YES)
3750 if (gfc_error_flag_test () == 0)
3751 gfc_error ("Syntax error in data declaration at %C");
3754 gfc_free_data_all (gfc_current_ns);
3757 gfc_free_array_spec (current_as);
3763 /* Match a prefix associated with a function or subroutine
3764 declaration. If the typespec pointer is nonnull, then a typespec
3765 can be matched. Note that if nothing matches, MATCH_YES is
3766 returned (the null string was matched). */
3769 gfc_match_prefix (gfc_typespec *ts)
3773 gfc_clear_attr (¤t_attr);
3776 gcc_assert (!gfc_matching_prefix);
3777 gfc_matching_prefix = true;
3780 if (!seen_type && ts != NULL
3781 && gfc_match_type_spec (ts, 0) == MATCH_YES
3782 && gfc_match_space () == MATCH_YES)
3789 if (gfc_match ("elemental% ") == MATCH_YES)
3791 if (gfc_add_elemental (¤t_attr, NULL) == FAILURE)
3797 if (gfc_match ("pure% ") == MATCH_YES)
3799 if (gfc_add_pure (¤t_attr, NULL) == FAILURE)
3805 if (gfc_match ("recursive% ") == MATCH_YES)
3807 if (gfc_add_recursive (¤t_attr, NULL) == FAILURE)
3813 /* At this point, the next item is not a prefix. */
3814 gcc_assert (gfc_matching_prefix);
3815 gfc_matching_prefix = false;
3819 gcc_assert (gfc_matching_prefix);
3820 gfc_matching_prefix = false;
3825 /* Copy attributes matched by gfc_match_prefix() to attributes on a symbol. */
3828 copy_prefix (symbol_attribute *dest, locus *where)
3830 if (current_attr.pure && gfc_add_pure (dest, where) == FAILURE)
3833 if (current_attr.elemental && gfc_add_elemental (dest, where) == FAILURE)
3836 if (current_attr.recursive && gfc_add_recursive (dest, where) == FAILURE)
3843 /* Match a formal argument list. */
3846 gfc_match_formal_arglist (gfc_symbol *progname, int st_flag, int null_flag)
3848 gfc_formal_arglist *head, *tail, *p, *q;
3849 char name[GFC_MAX_SYMBOL_LEN + 1];
3855 if (gfc_match_char ('(') != MATCH_YES)
3862 if (gfc_match_char (')') == MATCH_YES)
3867 if (gfc_match_char ('*') == MATCH_YES)
3871 m = gfc_match_name (name);
3875 if (gfc_get_symbol (name, NULL, &sym))
3879 p = gfc_get_formal_arglist ();
3891 /* We don't add the VARIABLE flavor because the name could be a
3892 dummy procedure. We don't apply these attributes to formal
3893 arguments of statement functions. */
3894 if (sym != NULL && !st_flag
3895 && (gfc_add_dummy (&sym->attr, sym->name, NULL) == FAILURE
3896 || gfc_missing_attr (&sym->attr, NULL) == FAILURE))
3902 /* The name of a program unit can be in a different namespace,
3903 so check for it explicitly. After the statement is accepted,
3904 the name is checked for especially in gfc_get_symbol(). */
3905 if (gfc_new_block != NULL && sym != NULL
3906 && strcmp (sym->name, gfc_new_block->name) == 0)
3908 gfc_error ("Name '%s' at %C is the name of the procedure",
3914 if (gfc_match_char (')') == MATCH_YES)
3917 m = gfc_match_char (',');
3920 gfc_error ("Unexpected junk in formal argument list at %C");
3926 /* Check for duplicate symbols in the formal argument list. */
3929 for (p = head; p->next; p = p->next)
3934 for (q = p->next; q; q = q->next)
3935 if (p->sym == q->sym)
3937 gfc_error ("Duplicate symbol '%s' in formal argument list "
3938 "at %C", p->sym->name);
3946 if (gfc_add_explicit_interface (progname, IFSRC_DECL, head, NULL)
3956 gfc_free_formal_arglist (head);
3961 /* Match a RESULT specification following a function declaration or
3962 ENTRY statement. Also matches the end-of-statement. */
3965 match_result (gfc_symbol *function, gfc_symbol **result)
3967 char name[GFC_MAX_SYMBOL_LEN + 1];
3971 if (gfc_match (" result (") != MATCH_YES)
3974 m = gfc_match_name (name);
3978 /* Get the right paren, and that's it because there could be the
3979 bind(c) attribute after the result clause. */
3980 if (gfc_match_char(')') != MATCH_YES)
3982 /* TODO: should report the missing right paren here. */
3986 if (strcmp (function->name, name) == 0)
3988 gfc_error ("RESULT variable at %C must be different than function name");
3992 if (gfc_get_symbol (name, NULL, &r))
3995 if (gfc_add_result (&r->attr, r->name, NULL) == FAILURE)
4004 /* Match a function suffix, which could be a combination of a result
4005 clause and BIND(C), either one, or neither. The draft does not
4006 require them to come in a specific order. */
4009 gfc_match_suffix (gfc_symbol *sym, gfc_symbol **result)
4011 match is_bind_c; /* Found bind(c). */
4012 match is_result; /* Found result clause. */
4013 match found_match; /* Status of whether we've found a good match. */
4014 char peek_char; /* Character we're going to peek at. */
4015 bool allow_binding_name;
4017 /* Initialize to having found nothing. */
4018 found_match = MATCH_NO;
4019 is_bind_c = MATCH_NO;
4020 is_result = MATCH_NO;
4022 /* Get the next char to narrow between result and bind(c). */
4023 gfc_gobble_whitespace ();
4024 peek_char = gfc_peek_ascii_char ();
4026 /* C binding names are not allowed for internal procedures. */
4027 if (gfc_current_state () == COMP_CONTAINS
4028 && sym->ns->proc_name->attr.flavor != FL_MODULE)
4029 allow_binding_name = false;
4031 allow_binding_name = true;
4036 /* Look for result clause. */
4037 is_result = match_result (sym, result);
4038 if (is_result == MATCH_YES)
4040 /* Now see if there is a bind(c) after it. */
4041 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
4042 /* We've found the result clause and possibly bind(c). */
4043 found_match = MATCH_YES;
4046 /* This should only be MATCH_ERROR. */
4047 found_match = is_result;
4050 /* Look for bind(c) first. */
4051 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
4052 if (is_bind_c == MATCH_YES)
4054 /* Now see if a result clause followed it. */
4055 is_result = match_result (sym, result);
4056 found_match = MATCH_YES;
4060 /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */
4061 found_match = MATCH_ERROR;
4065 gfc_error ("Unexpected junk after function declaration at %C");
4066 found_match = MATCH_ERROR;
4070 if (is_bind_c == MATCH_YES)
4072 /* Fortran 2008 draft allows BIND(C) for internal procedures. */
4073 if (gfc_current_state () == COMP_CONTAINS
4074 && sym->ns->proc_name->attr.flavor != FL_MODULE
4075 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute "
4076 "at %L may not be specified for an internal "
4077 "procedure", &gfc_current_locus)
4081 if (gfc_add_is_bind_c (&(sym->attr), sym->name, &gfc_current_locus, 1)
4090 /* Procedure pointer return value without RESULT statement:
4091 Add "hidden" result variable named "ppr@". */
4094 add_hidden_procptr_result (gfc_symbol *sym)
4098 if (gfc_notification_std (GFC_STD_F2003) == ERROR)
4101 /* First usage case: PROCEDURE and EXTERNAL statements. */
4102 case1 = gfc_current_state () == COMP_FUNCTION && gfc_current_block ()
4103 && strcmp (gfc_current_block ()->name, sym->name) == 0
4104 && sym->attr.external;
4105 /* Second usage case: INTERFACE statements. */
4106 case2 = gfc_current_state () == COMP_INTERFACE && gfc_state_stack->previous
4107 && gfc_state_stack->previous->state == COMP_FUNCTION
4108 && strcmp (gfc_state_stack->previous->sym->name, sym->name) == 0;
4114 gfc_get_sym_tree ("ppr@", gfc_current_ns, &stree, false);
4118 gfc_get_sym_tree ("ppr@", gfc_current_ns->parent, &stree, false);
4119 st2 = gfc_new_symtree (&gfc_current_ns->sym_root, "ppr@");
4120 st2->n.sym = stree->n.sym;
4122 sym->result = stree->n.sym;
4124 sym->result->attr.proc_pointer = sym->attr.proc_pointer;
4125 sym->result->attr.pointer = sym->attr.pointer;
4126 sym->result->attr.external = sym->attr.external;
4127 sym->result->attr.referenced = sym->attr.referenced;
4128 sym->result->ts = sym->ts;
4129 sym->attr.proc_pointer = 0;
4130 sym->attr.pointer = 0;
4131 sym->attr.external = 0;
4132 if (sym->result->attr.external && sym->result->attr.pointer)
4134 sym->result->attr.pointer = 0;
4135 sym->result->attr.proc_pointer = 1;
4138 return gfc_add_result (&sym->result->attr, sym->result->name, NULL);
4140 /* POINTER after PROCEDURE/EXTERNAL/INTERFACE statement. */
4141 else if (sym->attr.function && !sym->attr.external && sym->attr.pointer
4142 && sym->result && sym->result != sym && sym->result->attr.external
4143 && sym == gfc_current_ns->proc_name
4144 && sym == sym->result->ns->proc_name
4145 && strcmp ("ppr@", sym->result->name) == 0)
4147 sym->result->attr.proc_pointer = 1;
4148 sym->attr.pointer = 0;
4156 /* Match the interface for a PROCEDURE declaration,
4157 including brackets (R1212). */
4160 match_procedure_interface (gfc_symbol **proc_if)
4164 locus old_loc, entry_loc;
4165 gfc_namespace *old_ns = gfc_current_ns;
4166 char name[GFC_MAX_SYMBOL_LEN + 1];
4168 old_loc = entry_loc = gfc_current_locus;
4169 gfc_clear_ts (¤t_ts);
4171 if (gfc_match (" (") != MATCH_YES)
4173 gfc_current_locus = entry_loc;
4177 /* Get the type spec. for the procedure interface. */
4178 old_loc = gfc_current_locus;
4179 m = gfc_match_type_spec (¤t_ts, 0);
4180 gfc_gobble_whitespace ();
4181 if (m == MATCH_YES || (m == MATCH_NO && gfc_peek_ascii_char () == ')'))
4184 if (m == MATCH_ERROR)
4187 /* Procedure interface is itself a procedure. */
4188 gfc_current_locus = old_loc;
4189 m = gfc_match_name (name);
4191 /* First look to see if it is already accessible in the current
4192 namespace because it is use associated or contained. */
4194 if (gfc_find_sym_tree (name, NULL, 0, &st))
4197 /* If it is still not found, then try the parent namespace, if it
4198 exists and create the symbol there if it is still not found. */
4199 if (gfc_current_ns->parent)
4200 gfc_current_ns = gfc_current_ns->parent;
4201 if (st == NULL && gfc_get_ha_sym_tree (name, &st))
4204 gfc_current_ns = old_ns;
4205 *proc_if = st->n.sym;
4207 /* Various interface checks. */
4211 /* Resolve interface if possible. That way, attr.procedure is only set
4212 if it is declared by a later procedure-declaration-stmt, which is
4213 invalid per C1212. */
4214 while ((*proc_if)->ts.interface)
4215 *proc_if = (*proc_if)->ts.interface;
4217 if ((*proc_if)->generic)
4219 gfc_error ("Interface '%s' at %C may not be generic",
4223 if ((*proc_if)->attr.proc == PROC_ST_FUNCTION)
4225 gfc_error ("Interface '%s' at %C may not be a statement function",
4229 /* Handle intrinsic procedures. */
4230 if (!((*proc_if)->attr.external || (*proc_if)->attr.use_assoc
4231 || (*proc_if)->attr.if_source == IFSRC_IFBODY)
4232 && (gfc_is_intrinsic ((*proc_if), 0, gfc_current_locus)
4233 || gfc_is_intrinsic ((*proc_if), 1, gfc_current_locus)))
4234 (*proc_if)->attr.intrinsic = 1;
4235 if ((*proc_if)->attr.intrinsic
4236 && !gfc_intrinsic_actual_ok ((*proc_if)->name, 0))
4238 gfc_error ("Intrinsic procedure '%s' not allowed "
4239 "in PROCEDURE statement at %C", (*proc_if)->name);
4245 if (gfc_match (" )") != MATCH_YES)
4247 gfc_current_locus = entry_loc;
4255 /* Match a PROCEDURE declaration (R1211). */
4258 match_procedure_decl (void)
4261 gfc_symbol *sym, *proc_if = NULL;
4263 gfc_expr *initializer = NULL;
4265 /* Parse interface (with brackets). */
4266 m = match_procedure_interface (&proc_if);
4270 /* Parse attributes (with colons). */
4271 m = match_attr_spec();
4272 if (m == MATCH_ERROR)
4275 /* Get procedure symbols. */
4278 m = gfc_match_symbol (&sym, 0);
4281 else if (m == MATCH_ERROR)
4284 /* Add current_attr to the symbol attributes. */
4285 if (gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE)
4288 if (sym->attr.is_bind_c)
4290 /* Check for C1218. */
4291 if (!proc_if || !proc_if->attr.is_bind_c)
4293 gfc_error ("BIND(C) attribute at %C requires "
4294 "an interface with BIND(C)");
4297 /* Check for C1217. */
4298 if (has_name_equals && sym->attr.pointer)
4300 gfc_error ("BIND(C) procedure with NAME may not have "
4301 "POINTER attribute at %C");
4304 if (has_name_equals && sym->attr.dummy)
4306 gfc_error ("Dummy procedure at %C may not have "
4307 "BIND(C) attribute with NAME");
4310 /* Set binding label for BIND(C). */
4311 if (set_binding_label (sym->binding_label, sym->name, num) != SUCCESS)
4315 if (gfc_add_external (&sym->attr, NULL) == FAILURE)
4318 if (add_hidden_procptr_result (sym) == SUCCESS)
4321 if (gfc_add_proc (&sym->attr, sym->name, NULL) == FAILURE)
4324 /* Set interface. */
4325 if (proc_if != NULL)
4327 if (sym->ts.type != BT_UNKNOWN)
4329 gfc_error ("Procedure '%s' at %L already has basic type of %s",
4330 sym->name, &gfc_current_locus,
4331 gfc_basic_typename (sym->ts.type));
4334 sym->ts.interface = proc_if;
4335 sym->attr.untyped = 1;
4336 sym->attr.if_source = IFSRC_IFBODY;
4338 else if (current_ts.type != BT_UNKNOWN)
4340 if (gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE)
4342 sym->ts.interface = gfc_new_symbol ("", gfc_current_ns);
4343 sym->ts.interface->ts = current_ts;
4344 sym->ts.interface->attr.function = 1;
4345 sym->attr.function = sym->ts.interface->attr.function;
4346 sym->attr.if_source = IFSRC_UNKNOWN;
4349 if (gfc_match (" =>") == MATCH_YES)
4351 if (!current_attr.pointer)
4353 gfc_error ("Initialization at %C isn't for a pointer variable");
4358 m = gfc_match_null (&initializer);
4361 gfc_error ("Pointer initialization requires a NULL() at %C");
4365 if (gfc_pure (NULL))
4367 gfc_error ("Initialization of pointer at %C is not allowed in "
4368 "a PURE procedure");
4375 if (add_init_expr_to_sym (sym->name, &initializer, &gfc_current_locus)
4381 gfc_set_sym_referenced (sym);
4383 if (gfc_match_eos () == MATCH_YES)
4385 if (gfc_match_char (',') != MATCH_YES)
4390 gfc_error ("Syntax error in PROCEDURE statement at %C");
4394 /* Free stuff up and return. */
4395 gfc_free_expr (initializer);
4401 match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc);
4404 /* Match a procedure pointer component declaration (R445). */
4407 match_ppc_decl (void)
4410 gfc_symbol *proc_if = NULL;
4414 gfc_expr *initializer = NULL;
4415 gfc_typebound_proc* tb;
4416 char name[GFC_MAX_SYMBOL_LEN + 1];
4418 /* Parse interface (with brackets). */
4419 m = match_procedure_interface (&proc_if);
4423 /* Parse attributes. */
4424 tb = XCNEW (gfc_typebound_proc);
4425 tb->where = gfc_current_locus;
4426 m = match_binding_attributes (tb, false, true);
4427 if (m == MATCH_ERROR)
4430 gfc_clear_attr (¤t_attr);
4431 current_attr.procedure = 1;
4432 current_attr.proc_pointer = 1;
4433 current_attr.access = tb->access;
4434 current_attr.flavor = FL_PROCEDURE;
4436 /* Match the colons (required). */
4437 if (gfc_match (" ::") != MATCH_YES)
4439 gfc_error ("Expected '::' after binding-attributes at %C");
4443 /* Check for C450. */
4444 if (!tb->nopass && proc_if == NULL)
4446 gfc_error("NOPASS or explicit interface required at %C");
4450 /* Match PPC names. */
4454 m = gfc_match_name (name);
4457 else if (m == MATCH_ERROR)
4460 if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE)
4463 /* Add current_attr to the symbol attributes. */
4464 if (gfc_copy_attr (&c->attr, ¤t_attr, NULL) == FAILURE)
4467 if (gfc_add_external (&c->attr, NULL) == FAILURE)
4470 if (gfc_add_proc (&c->attr, name, NULL) == FAILURE)
4475 /* Set interface. */
4476 if (proc_if != NULL)
4478 c->ts.interface = proc_if;
4479 c->attr.untyped = 1;
4480 c->attr.if_source = IFSRC_IFBODY;
4482 else if (ts.type != BT_UNKNOWN)
4485 c->ts.interface = gfc_new_symbol ("", gfc_current_ns);
4486 c->ts.interface->ts = ts;
4487 c->ts.interface->attr.function = 1;
4488 c->attr.function = c->ts.interface->attr.function;
4489 c->attr.if_source = IFSRC_UNKNOWN;
4492 if (gfc_match (" =>") == MATCH_YES)
4494 m = gfc_match_null (&initializer);
4497 gfc_error ("Pointer initialization requires a NULL() at %C");
4500 if (gfc_pure (NULL))
4502 gfc_error ("Initialization of pointer at %C is not allowed in "
4503 "a PURE procedure");
4508 gfc_free_expr (initializer);
4511 c->initializer = initializer;
4514 if (gfc_match_eos () == MATCH_YES)
4516 if (gfc_match_char (',') != MATCH_YES)
4521 gfc_error ("Syntax error in procedure pointer component at %C");
4526 /* Match a PROCEDURE declaration inside an interface (R1206). */
4529 match_procedure_in_interface (void)
4533 char name[GFC_MAX_SYMBOL_LEN + 1];
4535 if (current_interface.type == INTERFACE_NAMELESS
4536 || current_interface.type == INTERFACE_ABSTRACT)
4538 gfc_error ("PROCEDURE at %C must be in a generic interface");
4544 m = gfc_match_name (name);
4547 else if (m == MATCH_ERROR)
4549 if (gfc_get_symbol (name, gfc_current_ns->parent, &sym))
4552 if (gfc_add_interface (sym) == FAILURE)
4555 if (gfc_match_eos () == MATCH_YES)
4557 if (gfc_match_char (',') != MATCH_YES)
4564 gfc_error ("Syntax error in PROCEDURE statement at %C");
4569 /* General matcher for PROCEDURE declarations. */
4571 static match match_procedure_in_type (void);
4574 gfc_match_procedure (void)
4578 switch (gfc_current_state ())
4583 case COMP_SUBROUTINE:
4585 m = match_procedure_decl ();
4587 case COMP_INTERFACE:
4588 m = match_procedure_in_interface ();
4591 m = match_ppc_decl ();
4593 case COMP_DERIVED_CONTAINS:
4594 m = match_procedure_in_type ();
4603 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROCEDURE statement at %C")
4611 /* Warn if a matched procedure has the same name as an intrinsic; this is
4612 simply a wrapper around gfc_warn_intrinsic_shadow that interprets the current
4613 parser-state-stack to find out whether we're in a module. */
4616 warn_intrinsic_shadow (const gfc_symbol* sym, bool func)
4620 in_module = (gfc_state_stack->previous
4621 && gfc_state_stack->previous->state == COMP_MODULE);
4623 gfc_warn_intrinsic_shadow (sym, in_module, func);
4627 /* Match a function declaration. */
4630 gfc_match_function_decl (void)
4632 char name[GFC_MAX_SYMBOL_LEN + 1];
4633 gfc_symbol *sym, *result;
4637 match found_match; /* Status returned by match func. */
4639 if (gfc_current_state () != COMP_NONE
4640 && gfc_current_state () != COMP_INTERFACE
4641 && gfc_current_state () != COMP_CONTAINS)
4644 gfc_clear_ts (¤t_ts);
4646 old_loc = gfc_current_locus;
4648 m = gfc_match_prefix (¤t_ts);
4651 gfc_current_locus = old_loc;
4655 if (gfc_match ("function% %n", name) != MATCH_YES)
4657 gfc_current_locus = old_loc;
4660 if (get_proc_name (name, &sym, false))
4663 if (add_hidden_procptr_result (sym) == SUCCESS)
4666 gfc_new_block = sym;
4668 m = gfc_match_formal_arglist (sym, 0, 0);
4671 gfc_error ("Expected formal argument list in function "
4672 "definition at %C");
4676 else if (m == MATCH_ERROR)
4681 /* According to the draft, the bind(c) and result clause can
4682 come in either order after the formal_arg_list (i.e., either
4683 can be first, both can exist together or by themselves or neither
4684 one). Therefore, the match_result can't match the end of the
4685 string, and check for the bind(c) or result clause in either order. */
4686 found_match = gfc_match_eos ();
4688 /* Make sure that it isn't already declared as BIND(C). If it is, it
4689 must have been marked BIND(C) with a BIND(C) attribute and that is
4690 not allowed for procedures. */
4691 if (sym->attr.is_bind_c == 1)
4693 sym->attr.is_bind_c = 0;
4694 if (sym->old_symbol != NULL)
4695 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4696 "variables or common blocks",
4697 &(sym->old_symbol->declared_at));
4699 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4700 "variables or common blocks", &gfc_current_locus);
4703 if (found_match != MATCH_YES)
4705 /* If we haven't found the end-of-statement, look for a suffix. */
4706 suffix_match = gfc_match_suffix (sym, &result);
4707 if (suffix_match == MATCH_YES)
4708 /* Need to get the eos now. */
4709 found_match = gfc_match_eos ();
4711 found_match = suffix_match;
4714 if(found_match != MATCH_YES)
4718 /* Make changes to the symbol. */
4721 if (gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE)
4724 if (gfc_missing_attr (&sym->attr, NULL) == FAILURE
4725 || copy_prefix (&sym->attr, &sym->declared_at) == FAILURE)
4728 /* Delay matching the function characteristics until after the
4729 specification block by signalling kind=-1. */
4730 sym->declared_at = old_loc;
4731 if (current_ts.type != BT_UNKNOWN)
4732 current_ts.kind = -1;
4734 current_ts.kind = 0;
4738 if (current_ts.type != BT_UNKNOWN
4739 && gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE)
4745 if (current_ts.type != BT_UNKNOWN
4746 && gfc_add_type (result, ¤t_ts, &gfc_current_locus)
4749 sym->result = result;
4752 /* Warn if this procedure has the same name as an intrinsic. */
4753 warn_intrinsic_shadow (sym, true);
4759 gfc_current_locus = old_loc;
4764 /* This is mostly a copy of parse.c(add_global_procedure) but modified to
4765 pass the name of the entry, rather than the gfc_current_block name, and
4766 to return false upon finding an existing global entry. */
4769 add_global_entry (const char *name, int sub)
4772 enum gfc_symbol_type type;
4774 s = gfc_get_gsymbol(name);
4775 type = sub ? GSYM_SUBROUTINE : GSYM_FUNCTION;
4778 || (s->type != GSYM_UNKNOWN
4779 && s->type != type))
4780 gfc_global_used(s, NULL);
4784 s->where = gfc_current_locus;
4786 s->ns = gfc_current_ns;
4793 /* Match an ENTRY statement. */
4796 gfc_match_entry (void)
4801 char name[GFC_MAX_SYMBOL_LEN + 1];
4802 gfc_compile_state state;
4806 bool module_procedure;
4810 m = gfc_match_name (name);
4814 state = gfc_current_state ();
4815 if (state != COMP_SUBROUTINE && state != COMP_FUNCTION)
4820 gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM");
4823 gfc_error ("ENTRY statement at %C cannot appear within a MODULE");
4825 case COMP_BLOCK_DATA:
4826 gfc_error ("ENTRY statement at %C cannot appear within "
4829 case COMP_INTERFACE:
4830 gfc_error ("ENTRY statement at %C cannot appear within "
4834 gfc_error ("ENTRY statement at %C cannot appear within "
4835 "a DERIVED TYPE block");
4838 gfc_error ("ENTRY statement at %C cannot appear within "
4839 "an IF-THEN block");
4842 gfc_error ("ENTRY statement at %C cannot appear within "
4846 gfc_error ("ENTRY statement at %C cannot appear within "
4850 gfc_error ("ENTRY statement at %C cannot appear within "
4854 gfc_error ("ENTRY statement at %C cannot appear within "
4858 gfc_error ("ENTRY statement at %C cannot appear within "
4859 "a contained subprogram");
4862 gfc_internal_error ("gfc_match_entry(): Bad state");
4867 module_procedure = gfc_current_ns->parent != NULL
4868 && gfc_current_ns->parent->proc_name
4869 && gfc_current_ns->parent->proc_name->attr.flavor
4872 if (gfc_current_ns->parent != NULL
4873 && gfc_current_ns->parent->proc_name
4874 && !module_procedure)
4876 gfc_error("ENTRY statement at %C cannot appear in a "
4877 "contained procedure");
4881 /* Module function entries need special care in get_proc_name
4882 because previous references within the function will have
4883 created symbols attached to the current namespace. */
4884 if (get_proc_name (name, &entry,
4885 gfc_current_ns->parent != NULL
4886 && module_procedure))
4889 proc = gfc_current_block ();
4891 /* Make sure that it isn't already declared as BIND(C). If it is, it
4892 must have been marked BIND(C) with a BIND(C) attribute and that is
4893 not allowed for procedures. */
4894 if (entry->attr.is_bind_c == 1)
4896 entry->attr.is_bind_c = 0;
4897 if (entry->old_symbol != NULL)
4898 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4899 "variables or common blocks",
4900 &(entry->old_symbol->declared_at));
4902 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4903 "variables or common blocks", &gfc_current_locus);
4906 /* Check what next non-whitespace character is so we can tell if there
4907 is the required parens if we have a BIND(C). */
4908 gfc_gobble_whitespace ();
4909 peek_char = gfc_peek_ascii_char ();
4911 if (state == COMP_SUBROUTINE)
4913 /* An entry in a subroutine. */
4914 if (!gfc_current_ns->parent && !add_global_entry (name, 1))
4917 m = gfc_match_formal_arglist (entry, 0, 1);
4921 /* Call gfc_match_bind_c with allow_binding_name = true as ENTRY can
4922 never be an internal procedure. */
4923 is_bind_c = gfc_match_bind_c (entry, true);
4924 if (is_bind_c == MATCH_ERROR)
4926 if (is_bind_c == MATCH_YES)
4928 if (peek_char != '(')
4930 gfc_error ("Missing required parentheses before BIND(C) at %C");
4933 if (gfc_add_is_bind_c (&(entry->attr), entry->name, &(entry->declared_at), 1)
4938 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
4939 || gfc_add_subroutine (&entry->attr, entry->name, NULL) == FAILURE)
4944 /* An entry in a function.
4945 We need to take special care because writing
4950 ENTRY f() RESULT (r)
4952 ENTRY f RESULT (r). */
4953 if (!gfc_current_ns->parent && !add_global_entry (name, 0))
4956 old_loc = gfc_current_locus;
4957 if (gfc_match_eos () == MATCH_YES)
4959 gfc_current_locus = old_loc;
4960 /* Match the empty argument list, and add the interface to
4962 m = gfc_match_formal_arglist (entry, 0, 1);
4965 m = gfc_match_formal_arglist (entry, 0, 0);
4972 if (gfc_match_eos () == MATCH_YES)
4974 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
4975 || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE)
4978 entry->result = entry;
4982 m = gfc_match_suffix (entry, &result);
4984 gfc_syntax_error (ST_ENTRY);
4990 if (gfc_add_result (&result->attr, result->name, NULL) == FAILURE
4991 || gfc_add_entry (&entry->attr, result->name, NULL) == FAILURE
4992 || gfc_add_function (&entry->attr, result->name, NULL)
4995 entry->result = result;
4999 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
5000 || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE)
5002 entry->result = entry;
5007 if (gfc_match_eos () != MATCH_YES)
5009 gfc_syntax_error (ST_ENTRY);
5013 entry->attr.recursive = proc->attr.recursive;
5014 entry->attr.elemental = proc->attr.elemental;
5015 entry->attr.pure = proc->attr.pure;
5017 el = gfc_get_entry_list ();
5019 el->next = gfc_current_ns->entries;
5020 gfc_current_ns->entries = el;
5022 el->id = el->next->id + 1;
5026 new_st.op = EXEC_ENTRY;
5027 new_st.ext.entry = el;
5033 /* Match a subroutine statement, including optional prefixes. */
5036 gfc_match_subroutine (void)
5038 char name[GFC_MAX_SYMBOL_LEN + 1];
5043 bool allow_binding_name;
5045 if (gfc_current_state () != COMP_NONE
5046 && gfc_current_state () != COMP_INTERFACE
5047 && gfc_current_state () != COMP_CONTAINS)
5050 m = gfc_match_prefix (NULL);
5054 m = gfc_match ("subroutine% %n", name);
5058 if (get_proc_name (name, &sym, false))
5061 if (add_hidden_procptr_result (sym) == SUCCESS)
5064 gfc_new_block = sym;
5066 /* Check what next non-whitespace character is so we can tell if there
5067 is the required parens if we have a BIND(C). */
5068 gfc_gobble_whitespace ();
5069 peek_char = gfc_peek_ascii_char ();
5071 if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE)
5074 if (gfc_match_formal_arglist (sym, 0, 1) != MATCH_YES)
5077 /* Make sure that it isn't already declared as BIND(C). If it is, it
5078 must have been marked BIND(C) with a BIND(C) attribute and that is
5079 not allowed for procedures. */
5080 if (sym->attr.is_bind_c == 1)
5082 sym->attr.is_bind_c = 0;
5083 if (sym->old_symbol != NULL)
5084 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5085 "variables or common blocks",
5086 &(sym->old_symbol->declared_at));
5088 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5089 "variables or common blocks", &gfc_current_locus);
5092 /* C binding names are not allowed for internal procedures. */
5093 if (gfc_current_state () == COMP_CONTAINS
5094 && sym->ns->proc_name->attr.flavor != FL_MODULE)
5095 allow_binding_name = false;
5097 allow_binding_name = true;
5099 /* Here, we are just checking if it has the bind(c) attribute, and if
5100 so, then we need to make sure it's all correct. If it doesn't,
5101 we still need to continue matching the rest of the subroutine line. */
5102 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
5103 if (is_bind_c == MATCH_ERROR)
5105 /* There was an attempt at the bind(c), but it was wrong. An
5106 error message should have been printed w/in the gfc_match_bind_c
5107 so here we'll just return the MATCH_ERROR. */
5111 if (is_bind_c == MATCH_YES)
5113 /* The following is allowed in the Fortran 2008 draft. */
5114 if (gfc_current_state () == COMP_CONTAINS
5115 && sym->ns->proc_name->attr.flavor != FL_MODULE
5116 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute "
5117 "at %L may not be specified for an internal "
5118 "procedure", &gfc_current_locus)
5122 if (peek_char != '(')
5124 gfc_error ("Missing required parentheses before BIND(C) at %C");
5127 if (gfc_add_is_bind_c (&(sym->attr), sym->name, &(sym->declared_at), 1)
5132 if (gfc_match_eos () != MATCH_YES)
5134 gfc_syntax_error (ST_SUBROUTINE);
5138 if (copy_prefix (&sym->attr, &sym->declared_at) == FAILURE)
5141 /* Warn if it has the same name as an intrinsic. */
5142 warn_intrinsic_shadow (sym, false);
5148 /* Match a BIND(C) specifier, with the optional 'name=' specifier if
5149 given, and set the binding label in either the given symbol (if not
5150 NULL), or in the current_ts. The symbol may be NULL because we may
5151 encounter the BIND(C) before the declaration itself. Return
5152 MATCH_NO if what we're looking at isn't a BIND(C) specifier,
5153 MATCH_ERROR if it is a BIND(C) clause but an error was encountered,
5154 or MATCH_YES if the specifier was correct and the binding label and
5155 bind(c) fields were set correctly for the given symbol or the
5156 current_ts. If allow_binding_name is false, no binding name may be
5160 gfc_match_bind_c (gfc_symbol *sym, bool allow_binding_name)
5162 /* binding label, if exists */
5163 char binding_label[GFC_MAX_SYMBOL_LEN + 1];
5167 /* Initialize the flag that specifies whether we encountered a NAME=
5168 specifier or not. */
5169 has_name_equals = 0;
5171 /* Init the first char to nil so we can catch if we don't have
5172 the label (name attr) or the symbol name yet. */
5173 binding_label[0] = '\0';
5175 /* This much we have to be able to match, in this order, if
5176 there is a bind(c) label. */
5177 if (gfc_match (" bind ( c ") != MATCH_YES)
5180 /* Now see if there is a binding label, or if we've reached the
5181 end of the bind(c) attribute without one. */
5182 if (gfc_match_char (',') == MATCH_YES)
5184 if (gfc_match (" name = ") != MATCH_YES)
5186 gfc_error ("Syntax error in NAME= specifier for binding label "
5188 /* should give an error message here */
5192 has_name_equals = 1;
5194 /* Get the opening quote. */
5195 double_quote = MATCH_YES;
5196 single_quote = MATCH_YES;
5197 double_quote = gfc_match_char ('"');
5198 if (double_quote != MATCH_YES)
5199 single_quote = gfc_match_char ('\'');
5200 if (double_quote != MATCH_YES && single_quote != MATCH_YES)
5202 gfc_error ("Syntax error in NAME= specifier for binding label "
5207 /* Grab the binding label, using functions that will not lower
5208 case the names automatically. */
5209 if (gfc_match_name_C (binding_label) != MATCH_YES)
5212 /* Get the closing quotation. */
5213 if (double_quote == MATCH_YES)
5215 if (gfc_match_char ('"') != MATCH_YES)
5217 gfc_error ("Missing closing quote '\"' for binding label at %C");
5218 /* User started string with '"' so looked to match it. */
5224 if (gfc_match_char ('\'') != MATCH_YES)
5226 gfc_error ("Missing closing quote '\'' for binding label at %C");
5227 /* User started string with "'" char. */
5233 /* Get the required right paren. */
5234 if (gfc_match_char (')') != MATCH_YES)
5236 gfc_error ("Missing closing paren for binding label at %C");
5240 if (has_name_equals && !allow_binding_name)
5242 gfc_error ("No binding name is allowed in BIND(C) at %C");
5246 if (has_name_equals && sym != NULL && sym->attr.dummy)
5248 gfc_error ("For dummy procedure %s, no binding name is "
5249 "allowed in BIND(C) at %C", sym->name);
5254 /* Save the binding label to the symbol. If sym is null, we're
5255 probably matching the typespec attributes of a declaration and
5256 haven't gotten the name yet, and therefore, no symbol yet. */
5257 if (binding_label[0] != '\0')
5261 strcpy (sym->binding_label, binding_label);
5264 strcpy (curr_binding_label, binding_label);
5266 else if (allow_binding_name)
5268 /* No binding label, but if symbol isn't null, we
5269 can set the label for it here.
5270 If name="" or allow_binding_name is false, no C binding name is
5272 if (sym != NULL && sym->name != NULL && has_name_equals == 0)
5273 strncpy (sym->binding_label, sym->name, strlen (sym->name) + 1);
5276 if (has_name_equals && gfc_current_state () == COMP_INTERFACE
5277 && current_interface.type == INTERFACE_ABSTRACT)
5279 gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C");
5287 /* Return nonzero if we're currently compiling a contained procedure. */
5290 contained_procedure (void)
5292 gfc_state_data *s = gfc_state_stack;
5294 if ((s->state == COMP_SUBROUTINE || s->state == COMP_FUNCTION)
5295 && s->previous != NULL && s->previous->state == COMP_CONTAINS)
5301 /* Set the kind of each enumerator. The kind is selected such that it is
5302 interoperable with the corresponding C enumeration type, making
5303 sure that -fshort-enums is honored. */
5308 enumerator_history *current_history = NULL;
5312 if (max_enum == NULL || enum_history == NULL)
5315 if (!flag_short_enums)
5321 kind = gfc_integer_kinds[i++].kind;
5323 while (kind < gfc_c_int_kind
5324 && gfc_check_integer_range (max_enum->initializer->value.integer,
5327 current_history = enum_history;
5328 while (current_history != NULL)
5330 current_history->sym->ts.kind = kind;
5331 current_history = current_history->next;
5336 /* Match any of the various end-block statements. Returns the type of
5337 END to the caller. The END INTERFACE, END IF, END DO and END
5338 SELECT statements cannot be replaced by a single END statement. */
5341 gfc_match_end (gfc_statement *st)
5343 char name[GFC_MAX_SYMBOL_LEN + 1];
5344 gfc_compile_state state;
5346 const char *block_name;
5351 old_loc = gfc_current_locus;
5352 if (gfc_match ("end") != MATCH_YES)
5355 state = gfc_current_state ();
5356 block_name = gfc_current_block () == NULL
5357 ? NULL : gfc_current_block ()->name;
5359 if (state == COMP_CONTAINS || state == COMP_DERIVED_CONTAINS)
5361 state = gfc_state_stack->previous->state;
5362 block_name = gfc_state_stack->previous->sym == NULL
5363 ? NULL : gfc_state_stack->previous->sym->name;
5370 *st = ST_END_PROGRAM;
5371 target = " program";
5375 case COMP_SUBROUTINE:
5376 *st = ST_END_SUBROUTINE;
5377 target = " subroutine";
5378 eos_ok = !contained_procedure ();
5382 *st = ST_END_FUNCTION;
5383 target = " function";
5384 eos_ok = !contained_procedure ();
5387 case COMP_BLOCK_DATA:
5388 *st = ST_END_BLOCK_DATA;
5389 target = " block data";
5394 *st = ST_END_MODULE;
5399 case COMP_INTERFACE:
5400 *st = ST_END_INTERFACE;
5401 target = " interface";
5406 case COMP_DERIVED_CONTAINS:
5425 *st = ST_END_SELECT;
5431 *st = ST_END_FORALL;
5446 last_initializer = NULL;
5448 gfc_free_enum_history ();
5452 gfc_error ("Unexpected END statement at %C");
5456 if (gfc_match_eos () == MATCH_YES)
5460 /* We would have required END [something]. */
5461 gfc_error ("%s statement expected at %L",
5462 gfc_ascii_statement (*st), &old_loc);
5469 /* Verify that we've got the sort of end-block that we're expecting. */
5470 if (gfc_match (target) != MATCH_YES)
5472 gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st));
5476 /* If we're at the end, make sure a block name wasn't required. */
5477 if (gfc_match_eos () == MATCH_YES)
5480 if (*st != ST_ENDDO && *st != ST_ENDIF && *st != ST_END_SELECT
5481 && *st != ST_END_FORALL && *st != ST_END_WHERE)
5484 if (gfc_current_block () == NULL)
5487 gfc_error ("Expected block name of '%s' in %s statement at %C",
5488 block_name, gfc_ascii_statement (*st));
5493 /* END INTERFACE has a special handler for its several possible endings. */
5494 if (*st == ST_END_INTERFACE)
5495 return gfc_match_end_interface ();
5497 /* We haven't hit the end of statement, so what is left must be an
5499 m = gfc_match_space ();
5501 m = gfc_match_name (name);
5504 gfc_error ("Expected terminating name at %C");
5508 if (block_name == NULL)
5511 if (strcmp (name, block_name) != 0 && strcmp (block_name, "ppr@") != 0)
5513 gfc_error ("Expected label '%s' for %s statement at %C", block_name,
5514 gfc_ascii_statement (*st));
5517 /* Procedure pointer as function result. */
5518 else if (strcmp (block_name, "ppr@") == 0
5519 && strcmp (name, gfc_current_block ()->ns->proc_name->name) != 0)
5521 gfc_error ("Expected label '%s' for %s statement at %C",
5522 gfc_current_block ()->ns->proc_name->name,
5523 gfc_ascii_statement (*st));
5527 if (gfc_match_eos () == MATCH_YES)
5531 gfc_syntax_error (*st);
5534 gfc_current_locus = old_loc;
5540 /***************** Attribute declaration statements ****************/
5542 /* Set the attribute of a single variable. */
5547 char name[GFC_MAX_SYMBOL_LEN + 1];
5555 m = gfc_match_name (name);
5559 if (find_special (name, &sym, false))
5562 var_locus = gfc_current_locus;
5564 /* Deal with possible array specification for certain attributes. */
5565 if (current_attr.dimension
5566 || current_attr.allocatable
5567 || current_attr.pointer
5568 || current_attr.target)
5570 m = gfc_match_array_spec (&as);
5571 if (m == MATCH_ERROR)
5574 if (current_attr.dimension && m == MATCH_NO)
5576 gfc_error ("Missing array specification at %L in DIMENSION "
5577 "statement", &var_locus);
5582 if (current_attr.dimension && sym->value)
5584 gfc_error ("Dimensions specified for %s at %L after its "
5585 "initialisation", sym->name, &var_locus);
5590 if ((current_attr.allocatable || current_attr.pointer)
5591 && (m == MATCH_YES) && (as->type != AS_DEFERRED))
5593 gfc_error ("Array specification must be deferred at %L", &var_locus);
5599 /* Update symbol table. DIMENSION attribute is set
5600 in gfc_set_array_spec(). */
5601 if (current_attr.dimension == 0
5602 && gfc_copy_attr (&sym->attr, ¤t_attr, &var_locus) == FAILURE)
5608 if (gfc_set_array_spec (sym, as, &var_locus) == FAILURE)
5614 if (sym->attr.cray_pointee && sym->as != NULL)
5616 /* Fix the array spec. */
5617 m = gfc_mod_pointee_as (sym->as);
5618 if (m == MATCH_ERROR)
5622 if (gfc_add_attribute (&sym->attr, &var_locus) == FAILURE)
5628 if ((current_attr.external || current_attr.intrinsic)
5629 && sym->attr.flavor != FL_PROCEDURE
5630 && gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL) == FAILURE)
5636 add_hidden_procptr_result (sym);
5641 gfc_free_array_spec (as);
5646 /* Generic attribute declaration subroutine. Used for attributes that
5647 just have a list of names. */
5654 /* Gobble the optional double colon, by simply ignoring the result
5664 if (gfc_match_eos () == MATCH_YES)
5670 if (gfc_match_char (',') != MATCH_YES)
5672 gfc_error ("Unexpected character in variable list at %C");
5682 /* This routine matches Cray Pointer declarations of the form:
5683 pointer ( <pointer>, <pointee> )
5685 pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ...
5686 The pointer, if already declared, should be an integer. Otherwise, we
5687 set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may
5688 be either a scalar, or an array declaration. No space is allocated for
5689 the pointee. For the statement
5690 pointer (ipt, ar(10))
5691 any subsequent uses of ar will be translated (in C-notation) as
5692 ar(i) => ((<type> *) ipt)(i)
5693 After gimplification, pointee variable will disappear in the code. */
5696 cray_pointer_decl (void)
5700 gfc_symbol *cptr; /* Pointer symbol. */
5701 gfc_symbol *cpte; /* Pointee symbol. */
5707 if (gfc_match_char ('(') != MATCH_YES)
5709 gfc_error ("Expected '(' at %C");
5713 /* Match pointer. */
5714 var_locus = gfc_current_locus;
5715 gfc_clear_attr (¤t_attr);
5716 gfc_add_cray_pointer (¤t_attr, &var_locus);
5717 current_ts.type = BT_INTEGER;
5718 current_ts.kind = gfc_index_integer_kind;
5720 m = gfc_match_symbol (&cptr, 0);
5723 gfc_error ("Expected variable name at %C");
5727 if (gfc_add_cray_pointer (&cptr->attr, &var_locus) == FAILURE)
5730 gfc_set_sym_referenced (cptr);
5732 if (cptr->ts.type == BT_UNKNOWN) /* Override the type, if necessary. */
5734 cptr->ts.type = BT_INTEGER;
5735 cptr->ts.kind = gfc_index_integer_kind;
5737 else if (cptr->ts.type != BT_INTEGER)
5739 gfc_error ("Cray pointer at %C must be an integer");
5742 else if (cptr->ts.kind < gfc_index_integer_kind)
5743 gfc_warning ("Cray pointer at %C has %d bytes of precision;"
5744 " memory addresses require %d bytes",
5745 cptr->ts.kind, gfc_index_integer_kind);
5747 if (gfc_match_char (',') != MATCH_YES)
5749 gfc_error ("Expected \",\" at %C");
5753 /* Match Pointee. */
5754 var_locus = gfc_current_locus;
5755 gfc_clear_attr (¤t_attr);
5756 gfc_add_cray_pointee (¤t_attr, &var_locus);
5757 current_ts.type = BT_UNKNOWN;
5758 current_ts.kind = 0;
5760 m = gfc_match_symbol (&cpte, 0);
5763 gfc_error ("Expected variable name at %C");
5767 /* Check for an optional array spec. */
5768 m = gfc_match_array_spec (&as);
5769 if (m == MATCH_ERROR)
5771 gfc_free_array_spec (as);
5774 else if (m == MATCH_NO)
5776 gfc_free_array_spec (as);
5780 if (gfc_add_cray_pointee (&cpte->attr, &var_locus) == FAILURE)
5783 gfc_set_sym_referenced (cpte);
5785 if (cpte->as == NULL)
5787 if (gfc_set_array_spec (cpte, as, &var_locus) == FAILURE)
5788 gfc_internal_error ("Couldn't set Cray pointee array spec.");
5790 else if (as != NULL)
5792 gfc_error ("Duplicate array spec for Cray pointee at %C");
5793 gfc_free_array_spec (as);
5799 if (cpte->as != NULL)
5801 /* Fix array spec. */
5802 m = gfc_mod_pointee_as (cpte->as);
5803 if (m == MATCH_ERROR)
5807 /* Point the Pointee at the Pointer. */
5808 cpte->cp_pointer = cptr;
5810 if (gfc_match_char (')') != MATCH_YES)
5812 gfc_error ("Expected \")\" at %C");
5815 m = gfc_match_char (',');
5817 done = true; /* Stop searching for more declarations. */
5821 if (m == MATCH_ERROR /* Failed when trying to find ',' above. */
5822 || gfc_match_eos () != MATCH_YES)
5824 gfc_error ("Expected \",\" or end of statement at %C");
5832 gfc_match_external (void)
5835 gfc_clear_attr (¤t_attr);
5836 current_attr.external = 1;
5838 return attr_decl ();
5843 gfc_match_intent (void)
5847 intent = match_intent_spec ();
5848 if (intent == INTENT_UNKNOWN)
5851 gfc_clear_attr (¤t_attr);
5852 current_attr.intent = intent;
5854 return attr_decl ();
5859 gfc_match_intrinsic (void)
5862 gfc_clear_attr (¤t_attr);
5863 current_attr.intrinsic = 1;
5865 return attr_decl ();
5870 gfc_match_optional (void)
5873 gfc_clear_attr (¤t_attr);
5874 current_attr.optional = 1;
5876 return attr_decl ();
5881 gfc_match_pointer (void)
5883 gfc_gobble_whitespace ();
5884 if (gfc_peek_ascii_char () == '(')
5886 if (!gfc_option.flag_cray_pointer)
5888 gfc_error ("Cray pointer declaration at %C requires -fcray-pointer "
5892 return cray_pointer_decl ();
5896 gfc_clear_attr (¤t_attr);
5897 current_attr.pointer = 1;
5899 return attr_decl ();
5905 gfc_match_allocatable (void)
5907 gfc_clear_attr (¤t_attr);
5908 current_attr.allocatable = 1;
5910 return attr_decl ();
5915 gfc_match_dimension (void)
5917 gfc_clear_attr (¤t_attr);
5918 current_attr.dimension = 1;
5920 return attr_decl ();
5925 gfc_match_target (void)
5927 gfc_clear_attr (¤t_attr);
5928 current_attr.target = 1;
5930 return attr_decl ();
5934 /* Match the list of entities being specified in a PUBLIC or PRIVATE
5938 access_attr_decl (gfc_statement st)
5940 char name[GFC_MAX_SYMBOL_LEN + 1];
5941 interface_type type;
5944 gfc_intrinsic_op op;
5947 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
5952 m = gfc_match_generic_spec (&type, name, &op);
5955 if (m == MATCH_ERROR)
5960 case INTERFACE_NAMELESS:
5961 case INTERFACE_ABSTRACT:
5964 case INTERFACE_GENERIC:
5965 if (gfc_get_symbol (name, NULL, &sym))
5968 if (gfc_add_access (&sym->attr, (st == ST_PUBLIC)
5969 ? ACCESS_PUBLIC : ACCESS_PRIVATE,
5970 sym->name, NULL) == FAILURE)
5975 case INTERFACE_INTRINSIC_OP:
5976 if (gfc_current_ns->operator_access[op] == ACCESS_UNKNOWN)
5978 gfc_current_ns->operator_access[op] =
5979 (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE;
5983 gfc_error ("Access specification of the %s operator at %C has "
5984 "already been specified", gfc_op2string (op));
5990 case INTERFACE_USER_OP:
5991 uop = gfc_get_uop (name);
5993 if (uop->access == ACCESS_UNKNOWN)
5995 uop->access = (st == ST_PUBLIC)
5996 ? ACCESS_PUBLIC : ACCESS_PRIVATE;
6000 gfc_error ("Access specification of the .%s. operator at %C "
6001 "has already been specified", sym->name);
6008 if (gfc_match_char (',') == MATCH_NO)
6012 if (gfc_match_eos () != MATCH_YES)
6017 gfc_syntax_error (st);
6025 gfc_match_protected (void)
6030 if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE)
6032 gfc_error ("PROTECTED at %C only allowed in specification "
6033 "part of a module");
6038 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED statement at %C")
6042 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6047 if (gfc_match_eos () == MATCH_YES)
6052 m = gfc_match_symbol (&sym, 0);
6056 if (gfc_add_protected (&sym->attr, sym->name, &gfc_current_locus)
6069 if (gfc_match_eos () == MATCH_YES)
6071 if (gfc_match_char (',') != MATCH_YES)
6078 gfc_error ("Syntax error in PROTECTED statement at %C");
6083 /* The PRIVATE statement is a bit weird in that it can be an attribute
6084 declaration, but also works as a standalone statement inside of a
6085 type declaration or a module. */
6088 gfc_match_private (gfc_statement *st)
6091 if (gfc_match ("private") != MATCH_YES)
6094 if (gfc_current_state () != COMP_MODULE
6095 && !(gfc_current_state () == COMP_DERIVED
6096 && gfc_state_stack->previous
6097 && gfc_state_stack->previous->state == COMP_MODULE)
6098 && !(gfc_current_state () == COMP_DERIVED_CONTAINS
6099 && gfc_state_stack->previous && gfc_state_stack->previous->previous
6100 && gfc_state_stack->previous->previous->state == COMP_MODULE))
6102 gfc_error ("PRIVATE statement at %C is only allowed in the "
6103 "specification part of a module");
6107 if (gfc_current_state () == COMP_DERIVED)
6109 if (gfc_match_eos () == MATCH_YES)
6115 gfc_syntax_error (ST_PRIVATE);
6119 if (gfc_match_eos () == MATCH_YES)
6126 return access_attr_decl (ST_PRIVATE);
6131 gfc_match_public (gfc_statement *st)
6134 if (gfc_match ("public") != MATCH_YES)
6137 if (gfc_current_state () != COMP_MODULE)
6139 gfc_error ("PUBLIC statement at %C is only allowed in the "
6140 "specification part of a module");
6144 if (gfc_match_eos () == MATCH_YES)
6151 return access_attr_decl (ST_PUBLIC);
6155 /* Workhorse for gfc_match_parameter. */
6164 m = gfc_match_symbol (&sym, 0);
6166 gfc_error ("Expected variable name at %C in PARAMETER statement");
6171 if (gfc_match_char ('=') == MATCH_NO)
6173 gfc_error ("Expected = sign in PARAMETER statement at %C");
6177 m = gfc_match_init_expr (&init);
6179 gfc_error ("Expected expression at %C in PARAMETER statement");
6183 if (sym->ts.type == BT_UNKNOWN
6184 && gfc_set_default_type (sym, 1, NULL) == FAILURE)
6190 if (gfc_check_assign_symbol (sym, init) == FAILURE
6191 || gfc_add_flavor (&sym->attr, FL_PARAMETER, sym->name, NULL) == FAILURE)
6199 gfc_error ("Initializing already initialized variable at %C");
6204 if (sym->ts.type == BT_CHARACTER
6205 && sym->ts.cl != NULL
6206 && sym->ts.cl->length != NULL
6207 && sym->ts.cl->length->expr_type == EXPR_CONSTANT
6208 && init->expr_type == EXPR_CONSTANT
6209 && init->ts.type == BT_CHARACTER)
6210 gfc_set_constant_character_len (
6211 mpz_get_si (sym->ts.cl->length->value.integer), init, -1);
6212 else if (sym->ts.type == BT_CHARACTER && sym->ts.cl != NULL
6213 && sym->ts.cl->length == NULL)
6216 if (init->expr_type == EXPR_CONSTANT)
6218 clen = init->value.character.length;
6219 sym->ts.cl->length = gfc_int_expr (clen);
6221 else if (init->expr_type == EXPR_ARRAY)
6223 gfc_expr *p = init->value.constructor->expr;
6224 clen = p->value.character.length;
6225 sym->ts.cl->length = gfc_int_expr (clen);
6227 else if (init->ts.cl && init->ts.cl->length)
6228 sym->ts.cl->length = gfc_copy_expr (sym->value->ts.cl->length);
6235 gfc_free_expr (init);
6240 /* Match a parameter statement, with the weird syntax that these have. */
6243 gfc_match_parameter (void)
6247 if (gfc_match_char ('(') == MATCH_NO)
6256 if (gfc_match (" )%t") == MATCH_YES)
6259 if (gfc_match_char (',') != MATCH_YES)
6261 gfc_error ("Unexpected characters in PARAMETER statement at %C");
6271 /* Save statements have a special syntax. */
6274 gfc_match_save (void)
6276 char n[GFC_MAX_SYMBOL_LEN+1];
6281 if (gfc_match_eos () == MATCH_YES)
6283 if (gfc_current_ns->seen_save)
6285 if (gfc_notify_std (GFC_STD_LEGACY, "Blanket SAVE statement at %C "
6286 "follows previous SAVE statement")
6291 gfc_current_ns->save_all = gfc_current_ns->seen_save = 1;
6295 if (gfc_current_ns->save_all)
6297 if (gfc_notify_std (GFC_STD_LEGACY, "SAVE statement at %C follows "
6298 "blanket SAVE statement")
6307 m = gfc_match_symbol (&sym, 0);
6311 if (gfc_add_save (&sym->attr, sym->name, &gfc_current_locus)
6323 m = gfc_match (" / %n /", &n);
6324 if (m == MATCH_ERROR)
6329 c = gfc_get_common (n, 0);
6332 gfc_current_ns->seen_save = 1;
6335 if (gfc_match_eos () == MATCH_YES)
6337 if (gfc_match_char (',') != MATCH_YES)
6344 gfc_error ("Syntax error in SAVE statement at %C");
6350 gfc_match_value (void)
6355 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE statement at %C")
6359 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6364 if (gfc_match_eos () == MATCH_YES)
6369 m = gfc_match_symbol (&sym, 0);
6373 if (gfc_add_value (&sym->attr, sym->name, &gfc_current_locus)
6386 if (gfc_match_eos () == MATCH_YES)
6388 if (gfc_match_char (',') != MATCH_YES)
6395 gfc_error ("Syntax error in VALUE statement at %C");
6401 gfc_match_volatile (void)
6406 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VOLATILE statement at %C")
6410 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6415 if (gfc_match_eos () == MATCH_YES)
6420 /* VOLATILE is special because it can be added to host-associated
6422 m = gfc_match_symbol (&sym, 1);
6426 if (gfc_add_volatile (&sym->attr, sym->name, &gfc_current_locus)
6439 if (gfc_match_eos () == MATCH_YES)
6441 if (gfc_match_char (',') != MATCH_YES)
6448 gfc_error ("Syntax error in VOLATILE statement at %C");
6453 /* Match a module procedure statement. Note that we have to modify
6454 symbols in the parent's namespace because the current one was there
6455 to receive symbols that are in an interface's formal argument list. */
6458 gfc_match_modproc (void)
6460 char name[GFC_MAX_SYMBOL_LEN + 1];
6463 gfc_namespace *module_ns;
6464 gfc_interface *old_interface_head, *interface;
6466 if (gfc_state_stack->state != COMP_INTERFACE
6467 || gfc_state_stack->previous == NULL
6468 || current_interface.type == INTERFACE_NAMELESS
6469 || current_interface.type == INTERFACE_ABSTRACT)
6471 gfc_error ("MODULE PROCEDURE at %C must be in a generic module "
6476 module_ns = gfc_current_ns->parent;
6477 for (; module_ns; module_ns = module_ns->parent)
6478 if (module_ns->proc_name->attr.flavor == FL_MODULE)
6481 if (module_ns == NULL)
6484 /* Store the current state of the interface. We will need it if we
6485 end up with a syntax error and need to recover. */
6486 old_interface_head = gfc_current_interface_head ();
6492 m = gfc_match_name (name);
6498 /* Check for syntax error before starting to add symbols to the
6499 current namespace. */
6500 if (gfc_match_eos () == MATCH_YES)
6502 if (!last && gfc_match_char (',') != MATCH_YES)
6505 /* Now we're sure the syntax is valid, we process this item
6507 if (gfc_get_symbol (name, module_ns, &sym))
6510 if (sym->attr.proc != PROC_MODULE
6511 && gfc_add_procedure (&sym->attr, PROC_MODULE,
6512 sym->name, NULL) == FAILURE)
6515 if (gfc_add_interface (sym) == FAILURE)
6518 sym->attr.mod_proc = 1;
6527 /* Restore the previous state of the interface. */
6528 interface = gfc_current_interface_head ();
6529 gfc_set_current_interface_head (old_interface_head);
6531 /* Free the new interfaces. */
6532 while (interface != old_interface_head)
6534 gfc_interface *i = interface->next;
6535 gfc_free (interface);
6539 /* And issue a syntax error. */
6540 gfc_syntax_error (ST_MODULE_PROC);
6545 /* Check a derived type that is being extended. */
6547 check_extended_derived_type (char *name)
6549 gfc_symbol *extended;
6551 if (gfc_find_symbol (name, gfc_current_ns, 1, &extended))
6553 gfc_error ("Ambiguous symbol in TYPE definition at %C");
6559 gfc_error ("No such symbol in TYPE definition at %C");
6563 if (extended->attr.flavor != FL_DERIVED)
6565 gfc_error ("'%s' in EXTENDS expression at %C is not a "
6566 "derived type", name);
6570 if (extended->attr.is_bind_c)
6572 gfc_error ("'%s' cannot be extended at %C because it "
6573 "is BIND(C)", extended->name);
6577 if (extended->attr.sequence)
6579 gfc_error ("'%s' cannot be extended at %C because it "
6580 "is a SEQUENCE type", extended->name);
6588 /* Match the optional attribute specifiers for a type declaration.
6589 Return MATCH_ERROR if an error is encountered in one of the handled
6590 attributes (public, private, bind(c)), MATCH_NO if what's found is
6591 not a handled attribute, and MATCH_YES otherwise. TODO: More error
6592 checking on attribute conflicts needs to be done. */
6595 gfc_get_type_attr_spec (symbol_attribute *attr, char *name)
6597 /* See if the derived type is marked as private. */
6598 if (gfc_match (" , private") == MATCH_YES)
6600 if (gfc_current_state () != COMP_MODULE)
6602 gfc_error ("Derived type at %C can only be PRIVATE in the "
6603 "specification part of a module");
6607 if (gfc_add_access (attr, ACCESS_PRIVATE, NULL, NULL) == FAILURE)
6610 else if (gfc_match (" , public") == MATCH_YES)
6612 if (gfc_current_state () != COMP_MODULE)
6614 gfc_error ("Derived type at %C can only be PUBLIC in the "
6615 "specification part of a module");
6619 if (gfc_add_access (attr, ACCESS_PUBLIC, NULL, NULL) == FAILURE)
6622 else if (gfc_match (" , bind ( c )") == MATCH_YES)
6624 /* If the type is defined to be bind(c) it then needs to make
6625 sure that all fields are interoperable. This will
6626 need to be a semantic check on the finished derived type.
6627 See 15.2.3 (lines 9-12) of F2003 draft. */
6628 if (gfc_add_is_bind_c (attr, NULL, &gfc_current_locus, 0) != SUCCESS)
6631 /* TODO: attr conflicts need to be checked, probably in symbol.c. */
6633 else if (gfc_match (" , abstract") == MATCH_YES)
6635 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ABSTRACT type at %C")
6639 if (gfc_add_abstract (attr, &gfc_current_locus) == FAILURE)
6642 else if (name && gfc_match(" , extends ( %n )", name) == MATCH_YES)
6644 if (gfc_add_extension (attr, &gfc_current_locus) == FAILURE)
6650 /* If we get here, something matched. */
6655 /* Match the beginning of a derived type declaration. If a type name
6656 was the result of a function, then it is possible to have a symbol
6657 already to be known as a derived type yet have no components. */
6660 gfc_match_derived_decl (void)
6662 char name[GFC_MAX_SYMBOL_LEN + 1];
6663 char parent[GFC_MAX_SYMBOL_LEN + 1];
6664 symbol_attribute attr;
6666 gfc_symbol *extended;
6668 match is_type_attr_spec = MATCH_NO;
6669 bool seen_attr = false;
6671 if (gfc_current_state () == COMP_DERIVED)
6676 gfc_clear_attr (&attr);
6681 is_type_attr_spec = gfc_get_type_attr_spec (&attr, parent);
6682 if (is_type_attr_spec == MATCH_ERROR)
6684 if (is_type_attr_spec == MATCH_YES)
6686 } while (is_type_attr_spec == MATCH_YES);
6688 /* Deal with derived type extensions. The extension attribute has
6689 been added to 'attr' but now the parent type must be found and
6692 extended = check_extended_derived_type (parent);
6694 if (parent[0] && !extended)
6697 if (gfc_match (" ::") != MATCH_YES && seen_attr)
6699 gfc_error ("Expected :: in TYPE definition at %C");
6703 m = gfc_match (" %n%t", name);
6707 /* Make sure the name is not the name of an intrinsic type. */
6708 if (gfc_is_intrinsic_typename (name))
6710 gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic "
6715 if (gfc_get_symbol (name, NULL, &sym))
6718 if (sym->ts.type != BT_UNKNOWN)
6720 gfc_error ("Derived type name '%s' at %C already has a basic type "
6721 "of %s", sym->name, gfc_typename (&sym->ts));
6725 /* The symbol may already have the derived attribute without the
6726 components. The ways this can happen is via a function
6727 definition, an INTRINSIC statement or a subtype in another
6728 derived type that is a pointer. The first part of the AND clause
6729 is true if the symbol is not the return value of a function. */
6730 if (sym->attr.flavor != FL_DERIVED
6731 && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE)
6734 if (sym->components != NULL || sym->attr.zero_comp)
6736 gfc_error ("Derived type definition of '%s' at %C has already been "
6737 "defined", sym->name);
6741 if (attr.access != ACCESS_UNKNOWN
6742 && gfc_add_access (&sym->attr, attr.access, sym->name, NULL) == FAILURE)
6745 /* See if the derived type was labeled as bind(c). */
6746 if (attr.is_bind_c != 0)
6747 sym->attr.is_bind_c = attr.is_bind_c;
6749 /* Construct the f2k_derived namespace if it is not yet there. */
6750 if (!sym->f2k_derived)
6751 sym->f2k_derived = gfc_get_namespace (NULL, 0);
6753 if (extended && !sym->components)
6758 /* Add the extended derived type as the first component. */
6759 gfc_add_component (sym, parent, &p);
6760 sym->attr.extension = attr.extension;
6762 gfc_set_sym_referenced (extended);
6764 p->ts.type = BT_DERIVED;
6765 p->ts.derived = extended;
6766 p->initializer = gfc_default_initializer (&p->ts);
6768 /* Provide the links between the extended type and its extension. */
6769 if (!extended->f2k_derived)
6770 extended->f2k_derived = gfc_get_namespace (NULL, 0);
6771 st = gfc_new_symtree (&extended->f2k_derived->sym_root, sym->name);
6775 /* Take over the ABSTRACT attribute. */
6776 sym->attr.abstract = attr.abstract;
6778 gfc_new_block = sym;
6784 /* Cray Pointees can be declared as:
6785 pointer (ipt, a (n,m,...,*))
6786 By default, this is treated as an AS_ASSUMED_SIZE array. We'll
6787 cheat and set a constant bound of 1 for the last dimension, if this
6788 is the case. Since there is no bounds-checking for Cray Pointees,
6789 this will be okay. */
6792 gfc_mod_pointee_as (gfc_array_spec *as)
6794 as->cray_pointee = true; /* This will be useful to know later. */
6795 if (as->type == AS_ASSUMED_SIZE)
6797 as->type = AS_EXPLICIT;
6798 as->upper[as->rank - 1] = gfc_int_expr (1);
6799 as->cp_was_assumed = true;
6801 else if (as->type == AS_ASSUMED_SHAPE)
6803 gfc_error ("Cray Pointee at %C cannot be assumed shape array");
6810 /* Match the enum definition statement, here we are trying to match
6811 the first line of enum definition statement.
6812 Returns MATCH_YES if match is found. */
6815 gfc_match_enum (void)
6819 m = gfc_match_eos ();
6823 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENUM and ENUMERATOR at %C")
6831 /* Returns an initializer whose value is one higher than the value of the
6832 LAST_INITIALIZER argument. If the argument is NULL, the
6833 initializers value will be set to zero. The initializer's kind
6834 will be set to gfc_c_int_kind.
6836 If -fshort-enums is given, the appropriate kind will be selected
6837 later after all enumerators have been parsed. A warning is issued
6838 here if an initializer exceeds gfc_c_int_kind. */
6841 enum_initializer (gfc_expr *last_initializer, locus where)
6845 result = gfc_get_expr ();
6846 result->expr_type = EXPR_CONSTANT;
6847 result->ts.type = BT_INTEGER;
6848 result->ts.kind = gfc_c_int_kind;
6849 result->where = where;
6851 mpz_init (result->value.integer);
6853 if (last_initializer != NULL)
6855 mpz_add_ui (result->value.integer, last_initializer->value.integer, 1);
6856 result->where = last_initializer->where;
6858 if (gfc_check_integer_range (result->value.integer,
6859 gfc_c_int_kind) != ARITH_OK)
6861 gfc_error ("Enumerator exceeds the C integer type at %C");
6867 /* Control comes here, if it's the very first enumerator and no
6868 initializer has been given. It will be initialized to zero. */
6869 mpz_set_si (result->value.integer, 0);
6876 /* Match a variable name with an optional initializer. When this
6877 subroutine is called, a variable is expected to be parsed next.
6878 Depending on what is happening at the moment, updates either the
6879 symbol table or the current interface. */
6882 enumerator_decl (void)
6884 char name[GFC_MAX_SYMBOL_LEN + 1];
6885 gfc_expr *initializer;
6886 gfc_array_spec *as = NULL;
6894 old_locus = gfc_current_locus;
6896 /* When we get here, we've just matched a list of attributes and
6897 maybe a type and a double colon. The next thing we expect to see
6898 is the name of the symbol. */
6899 m = gfc_match_name (name);
6903 var_locus = gfc_current_locus;
6905 /* OK, we've successfully matched the declaration. Now put the
6906 symbol in the current namespace. If we fail to create the symbol,
6908 if (build_sym (name, NULL, &as, &var_locus) == FAILURE)
6914 /* The double colon must be present in order to have initializers.
6915 Otherwise the statement is ambiguous with an assignment statement. */
6918 if (gfc_match_char ('=') == MATCH_YES)
6920 m = gfc_match_init_expr (&initializer);
6923 gfc_error ("Expected an initialization expression at %C");
6932 /* If we do not have an initializer, the initialization value of the
6933 previous enumerator (stored in last_initializer) is incremented
6934 by 1 and is used to initialize the current enumerator. */
6935 if (initializer == NULL)
6936 initializer = enum_initializer (last_initializer, old_locus);
6938 if (initializer == NULL || initializer->ts.type != BT_INTEGER)
6940 gfc_error("ENUMERATOR %L not initialized with integer expression",
6943 gfc_free_enum_history ();
6947 /* Store this current initializer, for the next enumerator variable
6948 to be parsed. add_init_expr_to_sym() zeros initializer, so we
6949 use last_initializer below. */
6950 last_initializer = initializer;
6951 t = add_init_expr_to_sym (name, &initializer, &var_locus);
6953 /* Maintain enumerator history. */
6954 gfc_find_symbol (name, NULL, 0, &sym);
6955 create_enum_history (sym, last_initializer);
6957 return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR;
6960 /* Free stuff up and return. */
6961 gfc_free_expr (initializer);
6967 /* Match the enumerator definition statement. */
6970 gfc_match_enumerator_def (void)
6975 gfc_clear_ts (¤t_ts);
6977 m = gfc_match (" enumerator");
6981 m = gfc_match (" :: ");
6982 if (m == MATCH_ERROR)
6985 colon_seen = (m == MATCH_YES);
6987 if (gfc_current_state () != COMP_ENUM)
6989 gfc_error ("ENUM definition statement expected before %C");
6990 gfc_free_enum_history ();
6994 (¤t_ts)->type = BT_INTEGER;
6995 (¤t_ts)->kind = gfc_c_int_kind;
6997 gfc_clear_attr (¤t_attr);
6998 t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, NULL);
7007 m = enumerator_decl ();
7008 if (m == MATCH_ERROR)
7013 if (gfc_match_eos () == MATCH_YES)
7015 if (gfc_match_char (',') != MATCH_YES)
7019 if (gfc_current_state () == COMP_ENUM)
7021 gfc_free_enum_history ();
7022 gfc_error ("Syntax error in ENUMERATOR definition at %C");
7027 gfc_free_array_spec (current_as);
7034 /* Match binding attributes. */
7037 match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc)
7039 bool found_passing = false;
7040 bool seen_ptr = false;
7041 match m = MATCH_YES;
7043 /* Intialize to defaults. Do so even before the MATCH_NO check so that in
7044 this case the defaults are in there. */
7045 ba->access = ACCESS_UNKNOWN;
7046 ba->pass_arg = NULL;
7047 ba->pass_arg_num = 0;
7049 ba->non_overridable = 0;
7053 /* If we find a comma, we believe there are binding attributes. */
7054 m = gfc_match_char (',');
7060 /* Access specifier. */
7062 m = gfc_match (" public");
7063 if (m == MATCH_ERROR)
7067 if (ba->access != ACCESS_UNKNOWN)
7069 gfc_error ("Duplicate access-specifier at %C");
7073 ba->access = ACCESS_PUBLIC;
7077 m = gfc_match (" private");
7078 if (m == MATCH_ERROR)
7082 if (ba->access != ACCESS_UNKNOWN)
7084 gfc_error ("Duplicate access-specifier at %C");
7088 ba->access = ACCESS_PRIVATE;
7092 /* If inside GENERIC, the following is not allowed. */
7097 m = gfc_match (" nopass");
7098 if (m == MATCH_ERROR)
7104 gfc_error ("Binding attributes already specify passing,"
7105 " illegal NOPASS at %C");
7109 found_passing = true;
7114 /* PASS possibly including argument. */
7115 m = gfc_match (" pass");
7116 if (m == MATCH_ERROR)
7120 char arg[GFC_MAX_SYMBOL_LEN + 1];
7124 gfc_error ("Binding attributes already specify passing,"
7125 " illegal PASS at %C");
7129 m = gfc_match (" ( %n )", arg);
7130 if (m == MATCH_ERROR)
7133 ba->pass_arg = gfc_get_string (arg);
7134 gcc_assert ((m == MATCH_YES) == (ba->pass_arg != NULL));
7136 found_passing = true;
7144 m = gfc_match (" pointer");
7145 if (m == MATCH_ERROR)
7151 gfc_error ("Duplicate POINTER attribute at %C");
7161 /* NON_OVERRIDABLE flag. */
7162 m = gfc_match (" non_overridable");
7163 if (m == MATCH_ERROR)
7167 if (ba->non_overridable)
7169 gfc_error ("Duplicate NON_OVERRIDABLE at %C");
7173 ba->non_overridable = 1;
7177 /* DEFERRED flag. */
7178 m = gfc_match (" deferred");
7179 if (m == MATCH_ERROR)
7185 gfc_error ("Duplicate DEFERRED at %C");
7196 /* Nothing matching found. */
7198 gfc_error ("Expected access-specifier at %C");
7200 gfc_error ("Expected binding attribute at %C");
7203 while (gfc_match_char (',') == MATCH_YES);
7205 /* NON_OVERRIDABLE and DEFERRED exclude themselves. */
7206 if (ba->non_overridable && ba->deferred)
7208 gfc_error ("NON_OVERRIDABLE and DEFERRED can't both appear at %C");
7215 if (ba->access == ACCESS_UNKNOWN)
7216 ba->access = gfc_typebound_default_access;
7218 if (ppc && !seen_ptr)
7220 gfc_error ("POINTER attribute is required for procedure pointer component"
7232 /* Match a PROCEDURE specific binding inside a derived type. */
7235 match_procedure_in_type (void)
7237 char name[GFC_MAX_SYMBOL_LEN + 1];
7238 char target_buf[GFC_MAX_SYMBOL_LEN + 1];
7239 char* target = NULL;
7240 gfc_typebound_proc* tb;
7248 /* Check current state. */
7249 gcc_assert (gfc_state_stack->state == COMP_DERIVED_CONTAINS);
7250 block = gfc_state_stack->previous->sym;
7253 /* Try to match PROCEDURE(interface). */
7254 if (gfc_match (" (") == MATCH_YES)
7256 m = gfc_match_name (target_buf);
7257 if (m == MATCH_ERROR)
7261 gfc_error ("Interface-name expected after '(' at %C");
7265 if (gfc_match (" )") != MATCH_YES)
7267 gfc_error ("')' expected at %C");
7271 target = target_buf;
7274 /* Construct the data structure. */
7275 tb = gfc_get_typebound_proc ();
7276 tb->where = gfc_current_locus;
7279 /* Match binding attributes. */
7280 m = match_binding_attributes (tb, false, false);
7281 if (m == MATCH_ERROR)
7283 seen_attrs = (m == MATCH_YES);
7285 /* Check that attribute DEFERRED is given iff an interface is specified, which
7286 means target != NULL. */
7287 if (tb->deferred && !target)
7289 gfc_error ("Interface must be specified for DEFERRED binding at %C");
7292 if (target && !tb->deferred)
7294 gfc_error ("PROCEDURE(interface) at %C should be declared DEFERRED");
7298 /* Match the colons. */
7299 m = gfc_match (" ::");
7300 if (m == MATCH_ERROR)
7302 seen_colons = (m == MATCH_YES);
7303 if (seen_attrs && !seen_colons)
7305 gfc_error ("Expected '::' after binding-attributes at %C");
7309 /* Match the binding name. */
7310 m = gfc_match_name (name);
7311 if (m == MATCH_ERROR)
7315 gfc_error ("Expected binding name at %C");
7319 /* Try to match the '=> target', if it's there. */
7320 m = gfc_match (" =>");
7321 if (m == MATCH_ERROR)
7327 gfc_error ("'=> target' is invalid for DEFERRED binding at %C");
7333 gfc_error ("'::' needed in PROCEDURE binding with explicit target"
7338 m = gfc_match_name (target_buf);
7339 if (m == MATCH_ERROR)
7343 gfc_error ("Expected binding target after '=>' at %C");
7346 target = target_buf;
7349 /* Now we should have the end. */
7350 m = gfc_match_eos ();
7351 if (m == MATCH_ERROR)
7355 gfc_error ("Junk after PROCEDURE declaration at %C");
7359 /* If no target was found, it has the same name as the binding. */
7363 /* Get the namespace to insert the symbols into. */
7364 ns = block->f2k_derived;
7367 /* If the binding is DEFERRED, check that the containing type is ABSTRACT. */
7368 if (tb->deferred && !block->attr.abstract)
7370 gfc_error ("Type '%s' containing DEFERRED binding at %C is not ABSTRACT",
7375 /* See if we already have a binding with this name in the symtree which would
7376 be an error. If a GENERIC already targetted this binding, it may be
7377 already there but then typebound is still NULL. */
7378 stree = gfc_find_symtree (ns->tb_sym_root, name);
7379 if (stree && stree->n.tb)
7381 gfc_error ("There's already a procedure with binding name '%s' for the"
7382 " derived type '%s' at %C", name, block->name);
7386 /* Insert it and set attributes. */
7390 stree = gfc_new_symtree (&ns->tb_sym_root, name);
7395 if (gfc_get_sym_tree (target, gfc_current_ns, &tb->u.specific, false))
7397 gfc_set_sym_referenced (tb->u.specific->n.sym);
7403 /* Match a GENERIC procedure binding inside a derived type. */
7406 gfc_match_generic (void)
7408 char name[GFC_MAX_SYMBOL_LEN + 1];
7409 char bind_name[GFC_MAX_SYMBOL_LEN + 16]; /* Allow space for OPERATOR(...). */
7411 gfc_typebound_proc tbattr; /* Used for match_binding_attributes. */
7412 gfc_typebound_proc* tb;
7414 interface_type op_type;
7415 gfc_intrinsic_op op;
7418 /* Check current state. */
7419 if (gfc_current_state () == COMP_DERIVED)
7421 gfc_error ("GENERIC at %C must be inside a derived-type CONTAINS");
7424 if (gfc_current_state () != COMP_DERIVED_CONTAINS)
7426 block = gfc_state_stack->previous->sym;
7427 ns = block->f2k_derived;
7428 gcc_assert (block && ns);
7430 /* See if we get an access-specifier. */
7431 m = match_binding_attributes (&tbattr, true, false);
7432 if (m == MATCH_ERROR)
7435 /* Now the colons, those are required. */
7436 if (gfc_match (" ::") != MATCH_YES)
7438 gfc_error ("Expected '::' at %C");
7442 /* Match the binding name; depending on type (operator / generic) format
7443 it for future error messages into bind_name. */
7445 m = gfc_match_generic_spec (&op_type, name, &op);
7446 if (m == MATCH_ERROR)
7450 gfc_error ("Expected generic name or operator descriptor at %C");
7456 case INTERFACE_GENERIC:
7457 snprintf (bind_name, sizeof (bind_name), "%s", name);
7460 case INTERFACE_USER_OP:
7461 snprintf (bind_name, sizeof (bind_name), "OPERATOR(.%s.)", name);
7464 case INTERFACE_INTRINSIC_OP:
7465 snprintf (bind_name, sizeof (bind_name), "OPERATOR(%s)",
7466 gfc_op2string (op));
7473 /* Match the required =>. */
7474 if (gfc_match (" =>") != MATCH_YES)
7476 gfc_error ("Expected '=>' at %C");
7480 /* Try to find existing GENERIC binding with this name / for this operator;
7481 if there is something, check that it is another GENERIC and then extend
7482 it rather than building a new node. Otherwise, create it and put it
7483 at the right position. */
7487 case INTERFACE_USER_OP:
7488 case INTERFACE_GENERIC:
7490 const bool is_op = (op_type == INTERFACE_USER_OP);
7493 st = gfc_find_symtree (is_op ? ns->tb_uop_root : ns->tb_sym_root, name);
7505 case INTERFACE_INTRINSIC_OP:
7515 if (!tb->is_generic)
7517 gcc_assert (op_type == INTERFACE_GENERIC);
7518 gfc_error ("There's already a non-generic procedure with binding name"
7519 " '%s' for the derived type '%s' at %C",
7520 bind_name, block->name);
7524 if (tb->access != tbattr.access)
7526 gfc_error ("Binding at %C must have the same access as already"
7527 " defined binding '%s'", bind_name);
7533 tb = gfc_get_typebound_proc ();
7534 tb->where = gfc_current_locus;
7535 tb->access = tbattr.access;
7537 tb->u.generic = NULL;
7541 case INTERFACE_GENERIC:
7542 case INTERFACE_USER_OP:
7544 const bool is_op = (op_type == INTERFACE_USER_OP);
7547 st = gfc_new_symtree (is_op ? &ns->tb_uop_root : &ns->tb_sym_root,
7555 case INTERFACE_INTRINSIC_OP:
7564 /* Now, match all following names as specific targets. */
7567 gfc_symtree* target_st;
7568 gfc_tbp_generic* target;
7570 m = gfc_match_name (name);
7571 if (m == MATCH_ERROR)
7575 gfc_error ("Expected specific binding name at %C");
7579 target_st = gfc_get_tbp_symtree (&ns->tb_sym_root, name);
7581 /* See if this is a duplicate specification. */
7582 for (target = tb->u.generic; target; target = target->next)
7583 if (target_st == target->specific_st)
7585 gfc_error ("'%s' already defined as specific binding for the"
7586 " generic '%s' at %C", name, bind_name);
7590 target = gfc_get_tbp_generic ();
7591 target->specific_st = target_st;
7592 target->specific = NULL;
7593 target->next = tb->u.generic;
7594 tb->u.generic = target;
7596 while (gfc_match (" ,") == MATCH_YES);
7598 /* Here should be the end. */
7599 if (gfc_match_eos () != MATCH_YES)
7601 gfc_error ("Junk after GENERIC binding at %C");
7612 /* Match a FINAL declaration inside a derived type. */
7615 gfc_match_final_decl (void)
7617 char name[GFC_MAX_SYMBOL_LEN + 1];
7620 gfc_namespace* module_ns;
7624 if (gfc_state_stack->state != COMP_DERIVED_CONTAINS)
7626 gfc_error ("FINAL declaration at %C must be inside a derived type "
7627 "CONTAINS section");
7631 block = gfc_state_stack->previous->sym;
7634 if (!gfc_state_stack->previous || !gfc_state_stack->previous->previous
7635 || gfc_state_stack->previous->previous->state != COMP_MODULE)
7637 gfc_error ("Derived type declaration with FINAL at %C must be in the"
7638 " specification part of a MODULE");
7642 module_ns = gfc_current_ns;
7643 gcc_assert (module_ns);
7644 gcc_assert (module_ns->proc_name->attr.flavor == FL_MODULE);
7646 /* Match optional ::, don't care about MATCH_YES or MATCH_NO. */
7647 if (gfc_match (" ::") == MATCH_ERROR)
7650 /* Match the sequence of procedure names. */
7657 if (first && gfc_match_eos () == MATCH_YES)
7659 gfc_error ("Empty FINAL at %C");
7663 m = gfc_match_name (name);
7666 gfc_error ("Expected module procedure name at %C");
7669 else if (m != MATCH_YES)
7672 if (gfc_match_eos () == MATCH_YES)
7674 if (!last && gfc_match_char (',') != MATCH_YES)
7676 gfc_error ("Expected ',' at %C");
7680 if (gfc_get_symbol (name, module_ns, &sym))
7682 gfc_error ("Unknown procedure name \"%s\" at %C", name);
7686 /* Mark the symbol as module procedure. */
7687 if (sym->attr.proc != PROC_MODULE
7688 && gfc_add_procedure (&sym->attr, PROC_MODULE,
7689 sym->name, NULL) == FAILURE)
7692 /* Check if we already have this symbol in the list, this is an error. */
7693 for (f = block->f2k_derived->finalizers; f; f = f->next)
7694 if (f->proc_sym == sym)
7696 gfc_error ("'%s' at %C is already defined as FINAL procedure!",
7701 /* Add this symbol to the list of finalizers. */
7702 gcc_assert (block->f2k_derived);
7704 f = XCNEW (gfc_finalizer);
7706 f->proc_tree = NULL;
7707 f->where = gfc_current_locus;
7708 f->next = block->f2k_derived->finalizers;
7709 block->f2k_derived->finalizers = f;
7719 const ext_attr_t ext_attr_list[] = {
7720 { "dllimport", EXT_ATTR_DLLIMPORT, "dllimport" },
7721 { "dllexport", EXT_ATTR_DLLEXPORT, "dllexport" },
7722 { "cdecl", EXT_ATTR_CDECL, "cdecl" },
7723 { "stdcall", EXT_ATTR_STDCALL, "stdcall" },
7724 { "fastcall", EXT_ATTR_FASTCALL, "fastcall" },
7725 { NULL, EXT_ATTR_LAST, NULL }
7728 /* Match a !GCC$ ATTRIBUTES statement of the form:
7729 !GCC$ ATTRIBUTES attribute-list :: var-name [, var-name] ...
7730 When we come here, we have already matched the !GCC$ ATTRIBUTES string.
7732 TODO: We should support all GCC attributes using the same syntax for
7733 the attribute list, i.e. the list in C
7734 __attributes(( attribute-list ))
7736 !GCC$ ATTRIBUTES attribute-list ::
7737 Cf. c-parser.c's c_parser_attributes; the data can then directly be
7740 As there is absolutely no risk of confusion, we should never return
7743 gfc_match_gcc_attributes (void)
7745 symbol_attribute attr;
7746 char name[GFC_MAX_SYMBOL_LEN + 1];
7751 gfc_clear_attr (&attr);
7756 if (gfc_match_name (name) != MATCH_YES)
7759 for (id = 0; id < EXT_ATTR_LAST; id++)
7760 if (strcmp (name, ext_attr_list[id].name) == 0)
7763 if (id == EXT_ATTR_LAST)
7765 gfc_error ("Unknown attribute in !GCC$ ATTRIBUTES statement at %C");
7769 if (gfc_add_ext_attribute (&attr, (ext_attr_id_t) id, &gfc_current_locus)
7773 gfc_gobble_whitespace ();
7774 ch = gfc_next_ascii_char ();
7777 /* This is the successful exit condition for the loop. */
7778 if (gfc_next_ascii_char () == ':')
7788 if (gfc_match_eos () == MATCH_YES)
7793 m = gfc_match_name (name);
7797 if (find_special (name, &sym, true))
7800 sym->attr.ext_attr |= attr.ext_attr;
7802 if (gfc_match_eos () == MATCH_YES)
7805 if (gfc_match_char (',') != MATCH_YES)
7812 gfc_error ("Syntax error in !GCC$ ATTRIBUTES statement at %C");