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.u.cl
626 && e->symtree->n.sym->ts.u.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.u.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.u.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.u.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.u.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.u.cl = gfc_new_charlen (gfc_current_ns, NULL);
1270 if (sym->attr.flavor == FL_PARAMETER)
1272 if (init->expr_type == EXPR_CONSTANT)
1274 clen = init->value.character.length;
1275 sym->ts.u.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.u.cl->length = gfc_int_expr (clen);
1283 else if (init->ts.u.cl && init->ts.u.cl->length)
1284 sym->ts.u.cl->length =
1285 gfc_copy_expr (sym->value->ts.u.cl->length);
1288 /* Update initializer character length according symbol. */
1289 else if (sym->ts.u.cl->length->expr_type == EXPR_CONSTANT)
1291 int len = mpz_get_si (sym->ts.u.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.u.cl = gfc_new_charlen (gfc_current_ns, NULL);
1301 init->ts.u.cl->length = gfc_copy_expr (sym->ts.u.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.u.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)
1413 if (c->ts.type == BT_CHARACTER)
1415 c->attr = current_attr;
1417 c->initializer = *init;
1422 c->attr.dimension = 1;
1425 /* Should this ever get more complicated, combine with similar section
1426 in add_init_expr_to_sym into a separate function. */
1427 if (c->ts.type == BT_CHARACTER && !c->attr.pointer && c->initializer && c->ts.u.cl
1428 && c->ts.u.cl->length && c->ts.u.cl->length->expr_type == EXPR_CONSTANT)
1432 gcc_assert (c->ts.u.cl && c->ts.u.cl->length);
1433 gcc_assert (c->ts.u.cl->length->expr_type == EXPR_CONSTANT);
1434 gcc_assert (c->ts.u.cl->length->ts.type == BT_INTEGER);
1436 len = mpz_get_si (c->ts.u.cl->length->value.integer);
1438 if (c->initializer->expr_type == EXPR_CONSTANT)
1439 gfc_set_constant_character_len (len, c->initializer, -1);
1440 else if (mpz_cmp (c->ts.u.cl->length->value.integer,
1441 c->initializer->ts.u.cl->length->value.integer))
1444 gfc_constructor *ctor = c->initializer->value.constructor;
1446 has_ts = (c->initializer->ts.u.cl
1447 && c->initializer->ts.u.cl->length_from_typespec);
1453 /* Remember the length of the first element for checking
1454 that all elements *in the constructor* have the same
1455 length. This need not be the length of the LHS! */
1456 gcc_assert (ctor->expr->expr_type == EXPR_CONSTANT);
1457 gcc_assert (ctor->expr->ts.type == BT_CHARACTER);
1458 first_len = ctor->expr->value.character.length;
1460 for (; ctor; ctor = ctor->next)
1462 if (ctor->expr->expr_type == EXPR_CONSTANT)
1463 gfc_set_constant_character_len (len, ctor->expr,
1464 has_ts ? -1 : first_len);
1470 /* Check array components. */
1471 if (!c->attr.dimension)
1473 if (c->attr.allocatable)
1475 gfc_error ("Allocatable component at %C must be an array");
1482 if (c->attr.pointer)
1484 if (c->as->type != AS_DEFERRED)
1486 gfc_error ("Pointer array component of structure at %C must have a "
1491 else if (c->attr.allocatable)
1493 if (c->as->type != AS_DEFERRED)
1495 gfc_error ("Allocatable component of structure at %C must have a "
1502 if (c->as->type != AS_EXPLICIT)
1504 gfc_error ("Array component of structure at %C must have an "
1514 /* Match a 'NULL()', and possibly take care of some side effects. */
1517 gfc_match_null (gfc_expr **result)
1523 m = gfc_match (" null ( )");
1527 /* The NULL symbol now has to be/become an intrinsic function. */
1528 if (gfc_get_symbol ("null", NULL, &sym))
1530 gfc_error ("NULL() initialization at %C is ambiguous");
1534 gfc_intrinsic_symbol (sym);
1536 if (sym->attr.proc != PROC_INTRINSIC
1537 && (gfc_add_procedure (&sym->attr, PROC_INTRINSIC,
1538 sym->name, NULL) == FAILURE
1539 || gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE))
1542 e = gfc_get_expr ();
1543 e->where = gfc_current_locus;
1544 e->expr_type = EXPR_NULL;
1545 e->ts.type = BT_UNKNOWN;
1553 /* Match a variable name with an optional initializer. When this
1554 subroutine is called, a variable is expected to be parsed next.
1555 Depending on what is happening at the moment, updates either the
1556 symbol table or the current interface. */
1559 variable_decl (int elem)
1561 char name[GFC_MAX_SYMBOL_LEN + 1];
1562 gfc_expr *initializer, *char_len;
1564 gfc_array_spec *cp_as; /* Extra copy for Cray Pointees. */
1575 old_locus = gfc_current_locus;
1577 /* When we get here, we've just matched a list of attributes and
1578 maybe a type and a double colon. The next thing we expect to see
1579 is the name of the symbol. */
1580 m = gfc_match_name (name);
1584 var_locus = gfc_current_locus;
1586 /* Now we could see the optional array spec. or character length. */
1587 m = gfc_match_array_spec (&as);
1588 if (gfc_option.flag_cray_pointer && m == MATCH_YES)
1589 cp_as = gfc_copy_array_spec (as);
1590 else if (m == MATCH_ERROR)
1594 as = gfc_copy_array_spec (current_as);
1599 if (current_ts.type == BT_CHARACTER)
1601 switch (match_char_length (&char_len))
1604 cl = gfc_new_charlen (gfc_current_ns, NULL);
1606 cl->length = char_len;
1609 /* Non-constant lengths need to be copied after the first
1610 element. Also copy assumed lengths. */
1613 && (current_ts.u.cl->length == NULL
1614 || current_ts.u.cl->length->expr_type != EXPR_CONSTANT))
1616 cl = gfc_new_charlen (gfc_current_ns, NULL);
1617 cl->length = gfc_copy_expr (current_ts.u.cl->length);
1620 cl = current_ts.u.cl;
1629 /* If this symbol has already shown up in a Cray Pointer declaration,
1630 then we want to set the type & bail out. */
1631 if (gfc_option.flag_cray_pointer)
1633 gfc_find_symbol (name, gfc_current_ns, 1, &sym);
1634 if (sym != NULL && sym->attr.cray_pointee)
1636 sym->ts.type = current_ts.type;
1637 sym->ts.kind = current_ts.kind;
1639 sym->ts.u.derived = current_ts.u.derived;
1640 sym->ts.is_c_interop = current_ts.is_c_interop;
1641 sym->ts.is_iso_c = current_ts.is_iso_c;
1644 /* Check to see if we have an array specification. */
1647 if (sym->as != NULL)
1649 gfc_error ("Duplicate array spec for Cray pointee at %C");
1650 gfc_free_array_spec (cp_as);
1656 if (gfc_set_array_spec (sym, cp_as, &var_locus) == FAILURE)
1657 gfc_internal_error ("Couldn't set pointee array spec.");
1659 /* Fix the array spec. */
1660 m = gfc_mod_pointee_as (sym->as);
1661 if (m == MATCH_ERROR)
1669 gfc_free_array_spec (cp_as);
1673 /* Procedure pointer as function result. */
1674 if (gfc_current_state () == COMP_FUNCTION
1675 && strcmp ("ppr@", gfc_current_block ()->name) == 0
1676 && strcmp (name, gfc_current_block ()->ns->proc_name->name) == 0)
1677 strcpy (name, "ppr@");
1679 if (gfc_current_state () == COMP_FUNCTION
1680 && strcmp (name, gfc_current_block ()->name) == 0
1681 && gfc_current_block ()->result
1682 && strcmp ("ppr@", gfc_current_block ()->result->name) == 0)
1683 strcpy (name, "ppr@");
1685 /* OK, we've successfully matched the declaration. Now put the
1686 symbol in the current namespace, because it might be used in the
1687 optional initialization expression for this symbol, e.g. this is
1690 integer, parameter :: i = huge(i)
1692 This is only true for parameters or variables of a basic type.
1693 For components of derived types, it is not true, so we don't
1694 create a symbol for those yet. If we fail to create the symbol,
1696 if (gfc_current_state () != COMP_DERIVED
1697 && build_sym (name, cl, &as, &var_locus) == FAILURE)
1703 /* An interface body specifies all of the procedure's
1704 characteristics and these shall be consistent with those
1705 specified in the procedure definition, except that the interface
1706 may specify a procedure that is not pure if the procedure is
1707 defined to be pure(12.3.2). */
1708 if (current_ts.type == BT_DERIVED
1709 && gfc_current_ns->proc_name
1710 && gfc_current_ns->proc_name->attr.if_source == IFSRC_IFBODY
1711 && current_ts.u.derived->ns != gfc_current_ns)
1714 st = gfc_find_symtree (gfc_current_ns->sym_root, current_ts.u.derived->name);
1715 if (!(current_ts.u.derived->attr.imported
1717 && st->n.sym == current_ts.u.derived)
1718 && !gfc_current_ns->has_import_set)
1720 gfc_error ("the type of '%s' at %C has not been declared within the "
1727 /* In functions that have a RESULT variable defined, the function
1728 name always refers to function calls. Therefore, the name is
1729 not allowed to appear in specification statements. */
1730 if (gfc_current_state () == COMP_FUNCTION
1731 && gfc_current_block () != NULL
1732 && gfc_current_block ()->result != NULL
1733 && gfc_current_block ()->result != gfc_current_block ()
1734 && strcmp (gfc_current_block ()->name, name) == 0)
1736 gfc_error ("Function name '%s' not allowed at %C", name);
1741 /* We allow old-style initializations of the form
1742 integer i /2/, j(4) /3*3, 1/
1743 (if no colon has been seen). These are different from data
1744 statements in that initializers are only allowed to apply to the
1745 variable immediately preceding, i.e.
1747 is not allowed. Therefore we have to do some work manually, that
1748 could otherwise be left to the matchers for DATA statements. */
1750 if (!colon_seen && gfc_match (" /") == MATCH_YES)
1752 if (gfc_notify_std (GFC_STD_GNU, "Extension: Old-style "
1753 "initialization at %C") == FAILURE)
1756 return match_old_style_init (name);
1759 /* The double colon must be present in order to have initializers.
1760 Otherwise the statement is ambiguous with an assignment statement. */
1763 if (gfc_match (" =>") == MATCH_YES)
1765 if (!current_attr.pointer)
1767 gfc_error ("Initialization at %C isn't for a pointer variable");
1772 m = gfc_match_null (&initializer);
1775 gfc_error ("Pointer initialization requires a NULL() at %C");
1779 if (gfc_pure (NULL))
1781 gfc_error ("Initialization of pointer at %C is not allowed in "
1782 "a PURE procedure");
1790 else if (gfc_match_char ('=') == MATCH_YES)
1792 if (current_attr.pointer)
1794 gfc_error ("Pointer initialization at %C requires '=>', "
1800 m = gfc_match_init_expr (&initializer);
1803 gfc_error ("Expected an initialization expression at %C");
1807 if (current_attr.flavor != FL_PARAMETER && gfc_pure (NULL))
1809 gfc_error ("Initialization of variable at %C is not allowed in "
1810 "a PURE procedure");
1819 if (initializer != NULL && current_attr.allocatable
1820 && gfc_current_state () == COMP_DERIVED)
1822 gfc_error ("Initialization of allocatable component at %C is not "
1828 /* Add the initializer. Note that it is fine if initializer is
1829 NULL here, because we sometimes also need to check if a
1830 declaration *must* have an initialization expression. */
1831 if (gfc_current_state () != COMP_DERIVED)
1832 t = add_init_expr_to_sym (name, &initializer, &var_locus);
1835 if (current_ts.type == BT_DERIVED
1836 && !current_attr.pointer && !initializer)
1837 initializer = gfc_default_initializer (¤t_ts);
1838 t = build_struct (name, cl, &initializer, &as);
1841 m = (t == SUCCESS) ? MATCH_YES : MATCH_ERROR;
1844 /* Free stuff up and return. */
1845 gfc_free_expr (initializer);
1846 gfc_free_array_spec (as);
1852 /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification.
1853 This assumes that the byte size is equal to the kind number for
1854 non-COMPLEX types, and equal to twice the kind number for COMPLEX. */
1857 gfc_match_old_kind_spec (gfc_typespec *ts)
1862 if (gfc_match_char ('*') != MATCH_YES)
1865 m = gfc_match_small_literal_int (&ts->kind, NULL);
1869 original_kind = ts->kind;
1871 /* Massage the kind numbers for complex types. */
1872 if (ts->type == BT_COMPLEX)
1876 gfc_error ("Old-style type declaration %s*%d not supported at %C",
1877 gfc_basic_typename (ts->type), original_kind);
1883 if (gfc_validate_kind (ts->type, ts->kind, true) < 0)
1885 gfc_error ("Old-style type declaration %s*%d not supported at %C",
1886 gfc_basic_typename (ts->type), original_kind);
1890 if (gfc_notify_std (GFC_STD_GNU, "Nonstandard type declaration %s*%d at %C",
1891 gfc_basic_typename (ts->type), original_kind) == FAILURE)
1898 /* Match a kind specification. Since kinds are generally optional, we
1899 usually return MATCH_NO if something goes wrong. If a "kind="
1900 string is found, then we know we have an error. */
1903 gfc_match_kind_spec (gfc_typespec *ts, bool kind_expr_only)
1915 where = loc = gfc_current_locus;
1920 if (gfc_match_char ('(') == MATCH_NO)
1923 /* Also gobbles optional text. */
1924 if (gfc_match (" kind = ") == MATCH_YES)
1927 loc = gfc_current_locus;
1930 n = gfc_match_init_expr (&e);
1934 if (gfc_matching_function)
1936 /* The function kind expression might include use associated or
1937 imported parameters and try again after the specification
1939 if (gfc_match_char (')') != MATCH_YES)
1941 gfc_error ("Missing right parenthesis at %C");
1947 gfc_undo_symbols ();
1952 /* ....or else, the match is real. */
1954 gfc_error ("Expected initialization expression at %C");
1962 gfc_error ("Expected scalar initialization expression at %C");
1967 msg = gfc_extract_int (e, &ts->kind);
1976 /* Before throwing away the expression, let's see if we had a
1977 C interoperable kind (and store the fact). */
1978 if (e->ts.is_c_interop == 1)
1980 /* Mark this as c interoperable if being declared with one
1981 of the named constants from iso_c_binding. */
1982 ts->is_c_interop = e->ts.is_iso_c;
1983 ts->f90_type = e->ts.f90_type;
1989 /* Ignore errors to this point, if we've gotten here. This means
1990 we ignore the m=MATCH_ERROR from above. */
1991 if (gfc_validate_kind (ts->type, ts->kind, true) < 0)
1993 gfc_error ("Kind %d not supported for type %s at %C", ts->kind,
1994 gfc_basic_typename (ts->type));
1995 gfc_current_locus = where;
1999 /* Warn if, e.g., c_int is used for a REAL variable, but not
2000 if, e.g., c_double is used for COMPLEX as the standard
2001 explicitly says that the kind type parameter for complex and real
2002 variable is the same, i.e. c_float == c_float_complex. */
2003 if (ts->f90_type != BT_UNKNOWN && ts->f90_type != ts->type
2004 && !((ts->f90_type == BT_REAL && ts->type == BT_COMPLEX)
2005 || (ts->f90_type == BT_COMPLEX && ts->type == BT_REAL)))
2006 gfc_warning_now ("C kind type parameter is for type %s but type at %L "
2007 "is %s", gfc_basic_typename (ts->f90_type), &where,
2008 gfc_basic_typename (ts->type));
2010 gfc_gobble_whitespace ();
2011 if ((c = gfc_next_ascii_char ()) != ')'
2012 && (ts->type != BT_CHARACTER || c != ','))
2014 if (ts->type == BT_CHARACTER)
2015 gfc_error ("Missing right parenthesis or comma at %C");
2017 gfc_error ("Missing right parenthesis at %C");
2021 /* All tests passed. */
2024 if(m == MATCH_ERROR)
2025 gfc_current_locus = where;
2027 /* Return what we know from the test(s). */
2032 gfc_current_locus = where;
2038 match_char_kind (int * kind, int * is_iso_c)
2047 where = gfc_current_locus;
2049 n = gfc_match_init_expr (&e);
2051 if (n != MATCH_YES && gfc_matching_function)
2053 /* The expression might include use-associated or imported
2054 parameters and try again after the specification
2057 gfc_undo_symbols ();
2062 gfc_error ("Expected initialization expression at %C");
2068 gfc_error ("Expected scalar initialization expression at %C");
2073 msg = gfc_extract_int (e, kind);
2074 *is_iso_c = e->ts.is_iso_c;
2084 /* Ignore errors to this point, if we've gotten here. This means
2085 we ignore the m=MATCH_ERROR from above. */
2086 if (gfc_validate_kind (BT_CHARACTER, *kind, true) < 0)
2088 gfc_error ("Kind %d is not supported for CHARACTER at %C", *kind);
2092 /* All tests passed. */
2095 if (m == MATCH_ERROR)
2096 gfc_current_locus = where;
2098 /* Return what we know from the test(s). */
2103 gfc_current_locus = where;
2108 /* Match the various kind/length specifications in a CHARACTER
2109 declaration. We don't return MATCH_NO. */
2112 gfc_match_char_spec (gfc_typespec *ts)
2114 int kind, seen_length, is_iso_c;
2124 /* Try the old-style specification first. */
2125 old_char_selector = 0;
2127 m = match_char_length (&len);
2131 old_char_selector = 1;
2136 m = gfc_match_char ('(');
2139 m = MATCH_YES; /* Character without length is a single char. */
2143 /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ). */
2144 if (gfc_match (" kind =") == MATCH_YES)
2146 m = match_char_kind (&kind, &is_iso_c);
2148 if (m == MATCH_ERROR)
2153 if (gfc_match (" , len =") == MATCH_NO)
2156 m = char_len_param_value (&len);
2159 if (m == MATCH_ERROR)
2166 /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>". */
2167 if (gfc_match (" len =") == MATCH_YES)
2169 m = char_len_param_value (&len);
2172 if (m == MATCH_ERROR)
2176 if (gfc_match_char (')') == MATCH_YES)
2179 if (gfc_match (" , kind =") != MATCH_YES)
2182 if (match_char_kind (&kind, &is_iso_c) == MATCH_ERROR)
2188 /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */
2189 m = char_len_param_value (&len);
2192 if (m == MATCH_ERROR)
2196 m = gfc_match_char (')');
2200 if (gfc_match_char (',') != MATCH_YES)
2203 gfc_match (" kind ="); /* Gobble optional text. */
2205 m = match_char_kind (&kind, &is_iso_c);
2206 if (m == MATCH_ERROR)
2212 /* Require a right-paren at this point. */
2213 m = gfc_match_char (')');
2218 gfc_error ("Syntax error in CHARACTER declaration at %C");
2220 gfc_free_expr (len);
2224 /* Deal with character functions after USE and IMPORT statements. */
2225 if (gfc_matching_function)
2227 gfc_free_expr (len);
2228 gfc_undo_symbols ();
2234 gfc_free_expr (len);
2238 /* Do some final massaging of the length values. */
2239 cl = gfc_new_charlen (gfc_current_ns, NULL);
2241 if (seen_length == 0)
2242 cl->length = gfc_int_expr (1);
2247 ts->kind = kind == 0 ? gfc_default_character_kind : kind;
2249 /* We have to know if it was a c interoperable kind so we can
2250 do accurate type checking of bind(c) procs, etc. */
2252 /* Mark this as c interoperable if being declared with one
2253 of the named constants from iso_c_binding. */
2254 ts->is_c_interop = is_iso_c;
2255 else if (len != NULL)
2256 /* Here, we might have parsed something such as: character(c_char)
2257 In this case, the parsing code above grabs the c_char when
2258 looking for the length (line 1690, roughly). it's the last
2259 testcase for parsing the kind params of a character variable.
2260 However, it's not actually the length. this seems like it
2262 To see if the user used a C interop kind, test the expr
2263 of the so called length, and see if it's C interoperable. */
2264 ts->is_c_interop = len->ts.is_iso_c;
2270 /* Matches a type specification. If successful, sets the ts structure
2271 to the matched specification. This is necessary for FUNCTION and
2272 IMPLICIT statements.
2274 If implicit_flag is nonzero, then we don't check for the optional
2275 kind specification. Not doing so is needed for matching an IMPLICIT
2276 statement correctly. */
2279 gfc_match_type_spec (gfc_typespec *ts, int implicit_flag)
2281 char name[GFC_MAX_SYMBOL_LEN + 1];
2285 bool seen_deferred_kind;
2287 /* A belt and braces check that the typespec is correctly being treated
2288 as a deferred characteristic association. */
2289 seen_deferred_kind = (gfc_current_state () == COMP_FUNCTION)
2290 && (gfc_current_block ()->result->ts.kind == -1)
2291 && (ts->kind == -1);
2293 if (seen_deferred_kind)
2296 /* Clear the current binding label, in case one is given. */
2297 curr_binding_label[0] = '\0';
2299 if (gfc_match (" byte") == MATCH_YES)
2301 if (gfc_notify_std (GFC_STD_GNU, "Extension: BYTE type at %C")
2305 if (gfc_validate_kind (BT_INTEGER, 1, true) < 0)
2307 gfc_error ("BYTE type used at %C "
2308 "is not available on the target machine");
2312 ts->type = BT_INTEGER;
2317 if (gfc_match (" integer") == MATCH_YES)
2319 ts->type = BT_INTEGER;
2320 ts->kind = gfc_default_integer_kind;
2324 if (gfc_match (" character") == MATCH_YES)
2326 ts->type = BT_CHARACTER;
2327 if (implicit_flag == 0)
2328 return gfc_match_char_spec (ts);
2333 if (gfc_match (" real") == MATCH_YES)
2336 ts->kind = gfc_default_real_kind;
2340 if (gfc_match (" double precision") == MATCH_YES)
2343 ts->kind = gfc_default_double_kind;
2347 if (gfc_match (" complex") == MATCH_YES)
2349 ts->type = BT_COMPLEX;
2350 ts->kind = gfc_default_complex_kind;
2354 if (gfc_match (" double complex") == MATCH_YES)
2356 if (gfc_notify_std (GFC_STD_GNU, "DOUBLE COMPLEX at %C does not "
2357 "conform to the Fortran 95 standard") == FAILURE)
2360 ts->type = BT_COMPLEX;
2361 ts->kind = gfc_default_double_kind;
2365 if (gfc_match (" logical") == MATCH_YES)
2367 ts->type = BT_LOGICAL;
2368 ts->kind = gfc_default_logical_kind;
2372 m = gfc_match (" type ( %n )", name);
2375 m = gfc_match (" class ( %n )", name);
2380 /* TODO: Implement Polymorphism. */
2381 gfc_warning ("Polymorphic entities are not yet implemented. "
2382 "CLASS will be treated like TYPE at %C");
2385 ts->type = BT_DERIVED;
2387 /* Defer association of the derived type until the end of the
2388 specification block. However, if the derived type can be
2389 found, add it to the typespec. */
2390 if (gfc_matching_function)
2392 ts->u.derived = NULL;
2393 if (gfc_current_state () != COMP_INTERFACE
2394 && !gfc_find_symbol (name, NULL, 1, &sym) && sym)
2395 ts->u.derived = sym;
2399 /* Search for the name but allow the components to be defined later. If
2400 type = -1, this typespec has been seen in a function declaration but
2401 the type could not be accessed at that point. */
2403 if (ts->kind != -1 && gfc_get_ha_symbol (name, &sym))
2405 gfc_error ("Type name '%s' at %C is ambiguous", name);
2408 else if (ts->kind == -1)
2410 int iface = gfc_state_stack->previous->state != COMP_INTERFACE
2411 || gfc_current_ns->has_import_set;
2412 if (gfc_find_symbol (name, NULL, iface, &sym))
2414 gfc_error ("Type name '%s' at %C is ambiguous", name);
2423 if (sym->attr.flavor != FL_DERIVED
2424 && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE)
2427 gfc_set_sym_referenced (sym);
2428 ts->u.derived = sym;
2433 /* For all types except double, derived and character, look for an
2434 optional kind specifier. MATCH_NO is actually OK at this point. */
2435 if (implicit_flag == 1)
2438 if (gfc_current_form == FORM_FREE)
2440 c = gfc_peek_ascii_char ();
2441 if (!gfc_is_whitespace (c) && c != '*' && c != '('
2442 && c != ':' && c != ',')
2446 m = gfc_match_kind_spec (ts, false);
2447 if (m == MATCH_NO && ts->type != BT_CHARACTER)
2448 m = gfc_match_old_kind_spec (ts);
2450 /* Defer association of the KIND expression of function results
2451 until after USE and IMPORT statements. */
2452 if ((gfc_current_state () == COMP_NONE && gfc_error_flag_test ())
2453 || gfc_matching_function)
2457 m = MATCH_YES; /* No kind specifier found. */
2463 /* Match an IMPLICIT NONE statement. Actually, this statement is
2464 already matched in parse.c, or we would not end up here in the
2465 first place. So the only thing we need to check, is if there is
2466 trailing garbage. If not, the match is successful. */
2469 gfc_match_implicit_none (void)
2471 return (gfc_match_eos () == MATCH_YES) ? MATCH_YES : MATCH_NO;
2475 /* Match the letter range(s) of an IMPLICIT statement. */
2478 match_implicit_range (void)
2484 cur_loc = gfc_current_locus;
2486 gfc_gobble_whitespace ();
2487 c = gfc_next_ascii_char ();
2490 gfc_error ("Missing character range in IMPLICIT at %C");
2497 gfc_gobble_whitespace ();
2498 c1 = gfc_next_ascii_char ();
2502 gfc_gobble_whitespace ();
2503 c = gfc_next_ascii_char ();
2508 inner = 0; /* Fall through. */
2515 gfc_gobble_whitespace ();
2516 c2 = gfc_next_ascii_char ();
2520 gfc_gobble_whitespace ();
2521 c = gfc_next_ascii_char ();
2523 if ((c != ',') && (c != ')'))
2536 gfc_error ("Letters must be in alphabetic order in "
2537 "IMPLICIT statement at %C");
2541 /* See if we can add the newly matched range to the pending
2542 implicits from this IMPLICIT statement. We do not check for
2543 conflicts with whatever earlier IMPLICIT statements may have
2544 set. This is done when we've successfully finished matching
2546 if (gfc_add_new_implicit_range (c1, c2) != SUCCESS)
2553 gfc_syntax_error (ST_IMPLICIT);
2555 gfc_current_locus = cur_loc;
2560 /* Match an IMPLICIT statement, storing the types for
2561 gfc_set_implicit() if the statement is accepted by the parser.
2562 There is a strange looking, but legal syntactic construction
2563 possible. It looks like:
2565 IMPLICIT INTEGER (a-b) (c-d)
2567 This is legal if "a-b" is a constant expression that happens to
2568 equal one of the legal kinds for integers. The real problem
2569 happens with an implicit specification that looks like:
2571 IMPLICIT INTEGER (a-b)
2573 In this case, a typespec matcher that is "greedy" (as most of the
2574 matchers are) gobbles the character range as a kindspec, leaving
2575 nothing left. We therefore have to go a bit more slowly in the
2576 matching process by inhibiting the kindspec checking during
2577 typespec matching and checking for a kind later. */
2580 gfc_match_implicit (void)
2589 /* We don't allow empty implicit statements. */
2590 if (gfc_match_eos () == MATCH_YES)
2592 gfc_error ("Empty IMPLICIT statement at %C");
2598 /* First cleanup. */
2599 gfc_clear_new_implicit ();
2601 /* A basic type is mandatory here. */
2602 m = gfc_match_type_spec (&ts, 1);
2603 if (m == MATCH_ERROR)
2608 cur_loc = gfc_current_locus;
2609 m = match_implicit_range ();
2613 /* We may have <TYPE> (<RANGE>). */
2614 gfc_gobble_whitespace ();
2615 c = gfc_next_ascii_char ();
2616 if ((c == '\n') || (c == ','))
2618 /* Check for CHARACTER with no length parameter. */
2619 if (ts.type == BT_CHARACTER && !ts.u.cl)
2621 ts.kind = gfc_default_character_kind;
2622 ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL);
2623 ts.u.cl->length = gfc_int_expr (1);
2626 /* Record the Successful match. */
2627 if (gfc_merge_new_implicit (&ts) != SUCCESS)
2632 gfc_current_locus = cur_loc;
2635 /* Discard the (incorrectly) matched range. */
2636 gfc_clear_new_implicit ();
2638 /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */
2639 if (ts.type == BT_CHARACTER)
2640 m = gfc_match_char_spec (&ts);
2643 m = gfc_match_kind_spec (&ts, false);
2646 m = gfc_match_old_kind_spec (&ts);
2647 if (m == MATCH_ERROR)
2653 if (m == MATCH_ERROR)
2656 m = match_implicit_range ();
2657 if (m == MATCH_ERROR)
2662 gfc_gobble_whitespace ();
2663 c = gfc_next_ascii_char ();
2664 if ((c != '\n') && (c != ','))
2667 if (gfc_merge_new_implicit (&ts) != SUCCESS)
2675 gfc_syntax_error (ST_IMPLICIT);
2683 gfc_match_import (void)
2685 char name[GFC_MAX_SYMBOL_LEN + 1];
2690 if (gfc_current_ns->proc_name == NULL
2691 || gfc_current_ns->proc_name->attr.if_source != IFSRC_IFBODY)
2693 gfc_error ("IMPORT statement at %C only permitted in "
2694 "an INTERFACE body");
2698 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IMPORT statement at %C")
2702 if (gfc_match_eos () == MATCH_YES)
2704 /* All host variables should be imported. */
2705 gfc_current_ns->has_import_set = 1;
2709 if (gfc_match (" ::") == MATCH_YES)
2711 if (gfc_match_eos () == MATCH_YES)
2713 gfc_error ("Expecting list of named entities at %C");
2720 m = gfc_match (" %n", name);
2724 if (gfc_current_ns->parent != NULL
2725 && gfc_find_symbol (name, gfc_current_ns->parent, 1, &sym))
2727 gfc_error ("Type name '%s' at %C is ambiguous", name);
2730 else if (gfc_current_ns->proc_name->ns->parent != NULL
2731 && gfc_find_symbol (name,
2732 gfc_current_ns->proc_name->ns->parent,
2735 gfc_error ("Type name '%s' at %C is ambiguous", name);
2741 gfc_error ("Cannot IMPORT '%s' from host scoping unit "
2742 "at %C - does not exist.", name);
2746 if (gfc_find_symtree (gfc_current_ns->sym_root,name))
2748 gfc_warning ("'%s' is already IMPORTed from host scoping unit "
2753 st = gfc_new_symtree (&gfc_current_ns->sym_root, sym->name);
2756 sym->attr.imported = 1;
2768 if (gfc_match_eos () == MATCH_YES)
2770 if (gfc_match_char (',') != MATCH_YES)
2777 gfc_error ("Syntax error in IMPORT statement at %C");
2782 /* A minimal implementation of gfc_match without whitespace, escape
2783 characters or variable arguments. Returns true if the next
2784 characters match the TARGET template exactly. */
2787 match_string_p (const char *target)
2791 for (p = target; *p; p++)
2792 if ((char) gfc_next_ascii_char () != *p)
2797 /* Matches an attribute specification including array specs. If
2798 successful, leaves the variables current_attr and current_as
2799 holding the specification. Also sets the colon_seen variable for
2800 later use by matchers associated with initializations.
2802 This subroutine is a little tricky in the sense that we don't know
2803 if we really have an attr-spec until we hit the double colon.
2804 Until that time, we can only return MATCH_NO. This forces us to
2805 check for duplicate specification at this level. */
2808 match_attr_spec (void)
2810 /* Modifiers that can exist in a type statement. */
2812 { GFC_DECL_BEGIN = 0,
2813 DECL_ALLOCATABLE = GFC_DECL_BEGIN, DECL_DIMENSION, DECL_EXTERNAL,
2814 DECL_IN, DECL_OUT, DECL_INOUT, DECL_INTRINSIC, DECL_OPTIONAL,
2815 DECL_PARAMETER, DECL_POINTER, DECL_PROTECTED, DECL_PRIVATE,
2816 DECL_PUBLIC, DECL_SAVE, DECL_TARGET, DECL_VALUE, DECL_VOLATILE,
2817 DECL_IS_BIND_C, DECL_NONE,
2818 GFC_DECL_END /* Sentinel */
2822 /* GFC_DECL_END is the sentinel, index starts at 0. */
2823 #define NUM_DECL GFC_DECL_END
2825 locus start, seen_at[NUM_DECL];
2832 gfc_clear_attr (¤t_attr);
2833 start = gfc_current_locus;
2838 /* See if we get all of the keywords up to the final double colon. */
2839 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
2847 gfc_gobble_whitespace ();
2849 ch = gfc_next_ascii_char ();
2852 /* This is the successful exit condition for the loop. */
2853 if (gfc_next_ascii_char () == ':')
2858 gfc_gobble_whitespace ();
2859 switch (gfc_peek_ascii_char ())
2862 if (match_string_p ("allocatable"))
2863 d = DECL_ALLOCATABLE;
2867 /* Try and match the bind(c). */
2868 m = gfc_match_bind_c (NULL, true);
2871 else if (m == MATCH_ERROR)
2876 if (match_string_p ("dimension"))
2881 if (match_string_p ("external"))
2886 if (match_string_p ("int"))
2888 ch = gfc_next_ascii_char ();
2891 if (match_string_p ("nt"))
2893 /* Matched "intent". */
2894 /* TODO: Call match_intent_spec from here. */
2895 if (gfc_match (" ( in out )") == MATCH_YES)
2897 else if (gfc_match (" ( in )") == MATCH_YES)
2899 else if (gfc_match (" ( out )") == MATCH_YES)
2905 if (match_string_p ("insic"))
2907 /* Matched "intrinsic". */
2915 if (match_string_p ("optional"))
2920 gfc_next_ascii_char ();
2921 switch (gfc_next_ascii_char ())
2924 if (match_string_p ("rameter"))
2926 /* Matched "parameter". */
2932 if (match_string_p ("inter"))
2934 /* Matched "pointer". */
2940 ch = gfc_next_ascii_char ();
2943 if (match_string_p ("vate"))
2945 /* Matched "private". */
2951 if (match_string_p ("tected"))
2953 /* Matched "protected". */
2960 if (match_string_p ("blic"))
2962 /* Matched "public". */
2970 if (match_string_p ("save"))
2975 if (match_string_p ("target"))
2980 gfc_next_ascii_char ();
2981 ch = gfc_next_ascii_char ();
2984 if (match_string_p ("lue"))
2986 /* Matched "value". */
2992 if (match_string_p ("latile"))
2994 /* Matched "volatile". */
3002 /* No double colon and no recognizable decl_type, so assume that
3003 we've been looking at something else the whole time. */
3010 /* Check to make sure any parens are paired up correctly. */
3011 if (gfc_match_parens () == MATCH_ERROR)
3018 seen_at[d] = gfc_current_locus;
3020 if (d == DECL_DIMENSION)
3022 m = gfc_match_array_spec (¤t_as);
3026 gfc_error ("Missing dimension specification at %C");
3030 if (m == MATCH_ERROR)
3035 /* Since we've seen a double colon, we have to be looking at an
3036 attr-spec. This means that we can now issue errors. */
3037 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
3042 case DECL_ALLOCATABLE:
3043 attr = "ALLOCATABLE";
3045 case DECL_DIMENSION:
3052 attr = "INTENT (IN)";
3055 attr = "INTENT (OUT)";
3058 attr = "INTENT (IN OUT)";
3060 case DECL_INTRINSIC:
3066 case DECL_PARAMETER:
3072 case DECL_PROTECTED:
3087 case DECL_IS_BIND_C:
3097 attr = NULL; /* This shouldn't happen. */
3100 gfc_error ("Duplicate %s attribute at %L", attr, &seen_at[d]);
3105 /* Now that we've dealt with duplicate attributes, add the attributes
3106 to the current attribute. */
3107 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
3112 if (gfc_current_state () == COMP_DERIVED
3113 && d != DECL_DIMENSION && d != DECL_POINTER
3114 && d != DECL_PRIVATE && d != DECL_PUBLIC
3117 if (d == DECL_ALLOCATABLE)
3119 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ALLOCATABLE "
3120 "attribute at %C in a TYPE definition")
3129 gfc_error ("Attribute at %L is not allowed in a TYPE definition",
3136 if ((d == DECL_PRIVATE || d == DECL_PUBLIC)
3137 && gfc_current_state () != COMP_MODULE)
3139 if (d == DECL_PRIVATE)
3143 if (gfc_current_state () == COMP_DERIVED
3144 && gfc_state_stack->previous
3145 && gfc_state_stack->previous->state == COMP_MODULE)
3147 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Attribute %s "
3148 "at %L in a TYPE definition", attr,
3158 gfc_error ("%s attribute at %L is not allowed outside of the "
3159 "specification part of a module", attr, &seen_at[d]);
3167 case DECL_ALLOCATABLE:
3168 t = gfc_add_allocatable (¤t_attr, &seen_at[d]);
3171 case DECL_DIMENSION:
3172 t = gfc_add_dimension (¤t_attr, NULL, &seen_at[d]);
3176 t = gfc_add_external (¤t_attr, &seen_at[d]);
3180 t = gfc_add_intent (¤t_attr, INTENT_IN, &seen_at[d]);
3184 t = gfc_add_intent (¤t_attr, INTENT_OUT, &seen_at[d]);
3188 t = gfc_add_intent (¤t_attr, INTENT_INOUT, &seen_at[d]);
3191 case DECL_INTRINSIC:
3192 t = gfc_add_intrinsic (¤t_attr, &seen_at[d]);
3196 t = gfc_add_optional (¤t_attr, &seen_at[d]);
3199 case DECL_PARAMETER:
3200 t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, &seen_at[d]);
3204 t = gfc_add_pointer (¤t_attr, &seen_at[d]);
3207 case DECL_PROTECTED:
3208 if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE)
3210 gfc_error ("PROTECTED at %C only allowed in specification "
3211 "part of a module");
3216 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED "
3221 t = gfc_add_protected (¤t_attr, NULL, &seen_at[d]);
3225 t = gfc_add_access (¤t_attr, ACCESS_PRIVATE, NULL,
3230 t = gfc_add_access (¤t_attr, ACCESS_PUBLIC, NULL,
3235 t = gfc_add_save (¤t_attr, NULL, &seen_at[d]);
3239 t = gfc_add_target (¤t_attr, &seen_at[d]);
3242 case DECL_IS_BIND_C:
3243 t = gfc_add_is_bind_c(¤t_attr, NULL, &seen_at[d], 0);
3247 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE attribute "
3252 t = gfc_add_value (¤t_attr, NULL, &seen_at[d]);
3256 if (gfc_notify_std (GFC_STD_F2003,
3257 "Fortran 2003: VOLATILE attribute at %C")
3261 t = gfc_add_volatile (¤t_attr, NULL, &seen_at[d]);
3265 gfc_internal_error ("match_attr_spec(): Bad attribute");
3279 gfc_current_locus = start;
3280 gfc_free_array_spec (current_as);
3286 /* Set the binding label, dest_label, either with the binding label
3287 stored in the given gfc_typespec, ts, or if none was provided, it
3288 will be the symbol name in all lower case, as required by the draft
3289 (J3/04-007, section 15.4.1). If a binding label was given and
3290 there is more than one argument (num_idents), it is an error. */
3293 set_binding_label (char *dest_label, const char *sym_name, int num_idents)
3295 if (num_idents > 1 && has_name_equals)
3297 gfc_error ("Multiple identifiers provided with "
3298 "single NAME= specifier at %C");
3302 if (curr_binding_label[0] != '\0')
3304 /* Binding label given; store in temp holder til have sym. */
3305 strcpy (dest_label, curr_binding_label);
3309 /* No binding label given, and the NAME= specifier did not exist,
3310 which means there was no NAME="". */
3311 if (sym_name != NULL && has_name_equals == 0)
3312 strcpy (dest_label, sym_name);
3319 /* Set the status of the given common block as being BIND(C) or not,
3320 depending on the given parameter, is_bind_c. */
3323 set_com_block_bind_c (gfc_common_head *com_block, int is_bind_c)
3325 com_block->is_bind_c = is_bind_c;
3330 /* Verify that the given gfc_typespec is for a C interoperable type. */
3333 verify_c_interop (gfc_typespec *ts)
3335 if (ts->type == BT_DERIVED && ts->u.derived != NULL)
3336 return (ts->u.derived->ts.is_c_interop ? SUCCESS : FAILURE);
3337 else if (ts->is_c_interop != 1)
3344 /* Verify that the variables of a given common block, which has been
3345 defined with the attribute specifier bind(c), to be of a C
3346 interoperable type. Errors will be reported here, if
3350 verify_com_block_vars_c_interop (gfc_common_head *com_block)
3352 gfc_symbol *curr_sym = NULL;
3353 gfc_try retval = SUCCESS;
3355 curr_sym = com_block->head;
3357 /* Make sure we have at least one symbol. */
3358 if (curr_sym == NULL)
3361 /* Here we know we have a symbol, so we'll execute this loop
3365 /* The second to last param, 1, says this is in a common block. */
3366 retval = verify_bind_c_sym (curr_sym, &(curr_sym->ts), 1, com_block);
3367 curr_sym = curr_sym->common_next;
3368 } while (curr_sym != NULL);
3374 /* Verify that a given BIND(C) symbol is C interoperable. If it is not,
3375 an appropriate error message is reported. */
3378 verify_bind_c_sym (gfc_symbol *tmp_sym, gfc_typespec *ts,
3379 int is_in_common, gfc_common_head *com_block)
3381 bool bind_c_function = false;
3382 gfc_try retval = SUCCESS;
3384 if (tmp_sym->attr.function && tmp_sym->attr.is_bind_c)
3385 bind_c_function = true;
3387 if (tmp_sym->attr.function && tmp_sym->result != NULL)
3389 tmp_sym = tmp_sym->result;
3390 /* Make sure it wasn't an implicitly typed result. */
3391 if (tmp_sym->attr.implicit_type)
3393 gfc_warning ("Implicitly declared BIND(C) function '%s' at "
3394 "%L may not be C interoperable", tmp_sym->name,
3395 &tmp_sym->declared_at);
3396 tmp_sym->ts.f90_type = tmp_sym->ts.type;
3397 /* Mark it as C interoperable to prevent duplicate warnings. */
3398 tmp_sym->ts.is_c_interop = 1;
3399 tmp_sym->attr.is_c_interop = 1;
3403 /* Here, we know we have the bind(c) attribute, so if we have
3404 enough type info, then verify that it's a C interop kind.
3405 The info could be in the symbol already, or possibly still in
3406 the given ts (current_ts), so look in both. */
3407 if (tmp_sym->ts.type != BT_UNKNOWN || ts->type != BT_UNKNOWN)
3409 if (verify_c_interop (&(tmp_sym->ts)) != SUCCESS)
3411 /* See if we're dealing with a sym in a common block or not. */
3412 if (is_in_common == 1)
3414 gfc_warning ("Variable '%s' in common block '%s' at %L "
3415 "may not be a C interoperable "
3416 "kind though common block '%s' is BIND(C)",
3417 tmp_sym->name, com_block->name,
3418 &(tmp_sym->declared_at), com_block->name);
3422 if (tmp_sym->ts.type == BT_DERIVED || ts->type == BT_DERIVED)
3423 gfc_error ("Type declaration '%s' at %L is not C "
3424 "interoperable but it is BIND(C)",
3425 tmp_sym->name, &(tmp_sym->declared_at));
3427 gfc_warning ("Variable '%s' at %L "
3428 "may not be a C interoperable "
3429 "kind but it is bind(c)",
3430 tmp_sym->name, &(tmp_sym->declared_at));
3434 /* Variables declared w/in a common block can't be bind(c)
3435 since there's no way for C to see these variables, so there's
3436 semantically no reason for the attribute. */
3437 if (is_in_common == 1 && tmp_sym->attr.is_bind_c == 1)
3439 gfc_error ("Variable '%s' in common block '%s' at "
3440 "%L cannot be declared with BIND(C) "
3441 "since it is not a global",
3442 tmp_sym->name, com_block->name,
3443 &(tmp_sym->declared_at));
3447 /* Scalar variables that are bind(c) can not have the pointer
3448 or allocatable attributes. */
3449 if (tmp_sym->attr.is_bind_c == 1)
3451 if (tmp_sym->attr.pointer == 1)
3453 gfc_error ("Variable '%s' at %L cannot have both the "
3454 "POINTER and BIND(C) attributes",
3455 tmp_sym->name, &(tmp_sym->declared_at));
3459 if (tmp_sym->attr.allocatable == 1)
3461 gfc_error ("Variable '%s' at %L cannot have both the "
3462 "ALLOCATABLE and BIND(C) attributes",
3463 tmp_sym->name, &(tmp_sym->declared_at));
3469 /* If it is a BIND(C) function, make sure the return value is a
3470 scalar value. The previous tests in this function made sure
3471 the type is interoperable. */
3472 if (bind_c_function && tmp_sym->as != NULL)
3473 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3474 "be an array", tmp_sym->name, &(tmp_sym->declared_at));
3476 /* BIND(C) functions can not return a character string. */
3477 if (bind_c_function && tmp_sym->ts.type == BT_CHARACTER)
3478 if (tmp_sym->ts.u.cl == NULL || tmp_sym->ts.u.cl->length == NULL
3479 || tmp_sym->ts.u.cl->length->expr_type != EXPR_CONSTANT
3480 || mpz_cmp_si (tmp_sym->ts.u.cl->length->value.integer, 1) != 0)
3481 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3482 "be a character string", tmp_sym->name,
3483 &(tmp_sym->declared_at));
3486 /* See if the symbol has been marked as private. If it has, make sure
3487 there is no binding label and warn the user if there is one. */
3488 if (tmp_sym->attr.access == ACCESS_PRIVATE
3489 && tmp_sym->binding_label[0] != '\0')
3490 /* Use gfc_warning_now because we won't say that the symbol fails
3491 just because of this. */
3492 gfc_warning_now ("Symbol '%s' at %L is marked PRIVATE but has been "
3493 "given the binding label '%s'", tmp_sym->name,
3494 &(tmp_sym->declared_at), tmp_sym->binding_label);
3500 /* Set the appropriate fields for a symbol that's been declared as
3501 BIND(C) (the is_bind_c flag and the binding label), and verify that
3502 the type is C interoperable. Errors are reported by the functions
3503 used to set/test these fields. */
3506 set_verify_bind_c_sym (gfc_symbol *tmp_sym, int num_idents)
3508 gfc_try retval = SUCCESS;
3510 /* TODO: Do we need to make sure the vars aren't marked private? */
3512 /* Set the is_bind_c bit in symbol_attribute. */
3513 gfc_add_is_bind_c (&(tmp_sym->attr), tmp_sym->name, &gfc_current_locus, 0);
3515 if (set_binding_label (tmp_sym->binding_label, tmp_sym->name,
3516 num_idents) != SUCCESS)
3523 /* Set the fields marking the given common block as BIND(C), including
3524 a binding label, and report any errors encountered. */
3527 set_verify_bind_c_com_block (gfc_common_head *com_block, int num_idents)
3529 gfc_try retval = SUCCESS;
3531 /* destLabel, common name, typespec (which may have binding label). */
3532 if (set_binding_label (com_block->binding_label, com_block->name, num_idents)
3536 /* Set the given common block (com_block) to being bind(c) (1). */
3537 set_com_block_bind_c (com_block, 1);
3543 /* Retrieve the list of one or more identifiers that the given bind(c)
3544 attribute applies to. */
3547 get_bind_c_idents (void)
3549 char name[GFC_MAX_SYMBOL_LEN + 1];
3551 gfc_symbol *tmp_sym = NULL;
3553 gfc_common_head *com_block = NULL;
3555 if (gfc_match_name (name) == MATCH_YES)
3557 found_id = MATCH_YES;
3558 gfc_get_ha_symbol (name, &tmp_sym);
3560 else if (match_common_name (name) == MATCH_YES)
3562 found_id = MATCH_YES;
3563 com_block = gfc_get_common (name, 0);
3567 gfc_error ("Need either entity or common block name for "
3568 "attribute specification statement at %C");
3572 /* Save the current identifier and look for more. */
3575 /* Increment the number of identifiers found for this spec stmt. */
3578 /* Make sure we have a sym or com block, and verify that it can
3579 be bind(c). Set the appropriate field(s) and look for more
3581 if (tmp_sym != NULL || com_block != NULL)
3583 if (tmp_sym != NULL)
3585 if (set_verify_bind_c_sym (tmp_sym, num_idents)
3591 if (set_verify_bind_c_com_block(com_block, num_idents)
3596 /* Look to see if we have another identifier. */
3598 if (gfc_match_eos () == MATCH_YES)
3599 found_id = MATCH_NO;
3600 else if (gfc_match_char (',') != MATCH_YES)
3601 found_id = MATCH_NO;
3602 else if (gfc_match_name (name) == MATCH_YES)
3604 found_id = MATCH_YES;
3605 gfc_get_ha_symbol (name, &tmp_sym);
3607 else if (match_common_name (name) == MATCH_YES)
3609 found_id = MATCH_YES;
3610 com_block = gfc_get_common (name, 0);
3614 gfc_error ("Missing entity or common block name for "
3615 "attribute specification statement at %C");
3621 gfc_internal_error ("Missing symbol");
3623 } while (found_id == MATCH_YES);
3625 /* if we get here we were successful */
3630 /* Try and match a BIND(C) attribute specification statement. */
3633 gfc_match_bind_c_stmt (void)
3635 match found_match = MATCH_NO;
3640 /* This may not be necessary. */
3642 /* Clear the temporary binding label holder. */
3643 curr_binding_label[0] = '\0';
3645 /* Look for the bind(c). */
3646 found_match = gfc_match_bind_c (NULL, true);
3648 if (found_match == MATCH_YES)
3650 /* Look for the :: now, but it is not required. */
3653 /* Get the identifier(s) that needs to be updated. This may need to
3654 change to hand the flag(s) for the attr specified so all identifiers
3655 found can have all appropriate parts updated (assuming that the same
3656 spec stmt can have multiple attrs, such as both bind(c) and
3658 if (get_bind_c_idents () != SUCCESS)
3659 /* Error message should have printed already. */
3667 /* Match a data declaration statement. */
3670 gfc_match_data_decl (void)
3676 num_idents_on_line = 0;
3678 m = gfc_match_type_spec (¤t_ts, 0);
3682 if (current_ts.type == BT_DERIVED && gfc_current_state () != COMP_DERIVED)
3684 sym = gfc_use_derived (current_ts.u.derived);
3692 current_ts.u.derived = sym;
3695 m = match_attr_spec ();
3696 if (m == MATCH_ERROR)
3702 if (current_ts.type == BT_DERIVED && current_ts.u.derived->components == NULL
3703 && !current_ts.u.derived->attr.zero_comp)
3706 if (current_attr.pointer && gfc_current_state () == COMP_DERIVED)
3709 gfc_find_symbol (current_ts.u.derived->name,
3710 current_ts.u.derived->ns->parent, 1, &sym);
3712 /* Any symbol that we find had better be a type definition
3713 which has its components defined. */
3714 if (sym != NULL && sym->attr.flavor == FL_DERIVED
3715 && (current_ts.u.derived->components != NULL
3716 || current_ts.u.derived->attr.zero_comp))
3719 /* Now we have an error, which we signal, and then fix up
3720 because the knock-on is plain and simple confusing. */
3721 gfc_error_now ("Derived type at %C has not been previously defined "
3722 "and so cannot appear in a derived type definition");
3723 current_attr.pointer = 1;
3728 /* If we have an old-style character declaration, and no new-style
3729 attribute specifications, then there a comma is optional between
3730 the type specification and the variable list. */
3731 if (m == MATCH_NO && current_ts.type == BT_CHARACTER && old_char_selector)
3732 gfc_match_char (',');
3734 /* Give the types/attributes to symbols that follow. Give the element
3735 a number so that repeat character length expressions can be copied. */
3739 num_idents_on_line++;
3740 m = variable_decl (elem++);
3741 if (m == MATCH_ERROR)
3746 if (gfc_match_eos () == MATCH_YES)
3748 if (gfc_match_char (',') != MATCH_YES)
3752 if (gfc_error_flag_test () == 0)
3753 gfc_error ("Syntax error in data declaration at %C");
3756 gfc_free_data_all (gfc_current_ns);
3759 gfc_free_array_spec (current_as);
3765 /* Match a prefix associated with a function or subroutine
3766 declaration. If the typespec pointer is nonnull, then a typespec
3767 can be matched. Note that if nothing matches, MATCH_YES is
3768 returned (the null string was matched). */
3771 gfc_match_prefix (gfc_typespec *ts)
3775 gfc_clear_attr (¤t_attr);
3778 gcc_assert (!gfc_matching_prefix);
3779 gfc_matching_prefix = true;
3782 if (!seen_type && ts != NULL
3783 && gfc_match_type_spec (ts, 0) == MATCH_YES
3784 && gfc_match_space () == MATCH_YES)
3791 if (gfc_match ("elemental% ") == MATCH_YES)
3793 if (gfc_add_elemental (¤t_attr, NULL) == FAILURE)
3799 if (gfc_match ("pure% ") == MATCH_YES)
3801 if (gfc_add_pure (¤t_attr, NULL) == FAILURE)
3807 if (gfc_match ("recursive% ") == MATCH_YES)
3809 if (gfc_add_recursive (¤t_attr, NULL) == FAILURE)
3815 /* At this point, the next item is not a prefix. */
3816 gcc_assert (gfc_matching_prefix);
3817 gfc_matching_prefix = false;
3821 gcc_assert (gfc_matching_prefix);
3822 gfc_matching_prefix = false;
3827 /* Copy attributes matched by gfc_match_prefix() to attributes on a symbol. */
3830 copy_prefix (symbol_attribute *dest, locus *where)
3832 if (current_attr.pure && gfc_add_pure (dest, where) == FAILURE)
3835 if (current_attr.elemental && gfc_add_elemental (dest, where) == FAILURE)
3838 if (current_attr.recursive && gfc_add_recursive (dest, where) == FAILURE)
3845 /* Match a formal argument list. */
3848 gfc_match_formal_arglist (gfc_symbol *progname, int st_flag, int null_flag)
3850 gfc_formal_arglist *head, *tail, *p, *q;
3851 char name[GFC_MAX_SYMBOL_LEN + 1];
3857 if (gfc_match_char ('(') != MATCH_YES)
3864 if (gfc_match_char (')') == MATCH_YES)
3869 if (gfc_match_char ('*') == MATCH_YES)
3873 m = gfc_match_name (name);
3877 if (gfc_get_symbol (name, NULL, &sym))
3881 p = gfc_get_formal_arglist ();
3893 /* We don't add the VARIABLE flavor because the name could be a
3894 dummy procedure. We don't apply these attributes to formal
3895 arguments of statement functions. */
3896 if (sym != NULL && !st_flag
3897 && (gfc_add_dummy (&sym->attr, sym->name, NULL) == FAILURE
3898 || gfc_missing_attr (&sym->attr, NULL) == FAILURE))
3904 /* The name of a program unit can be in a different namespace,
3905 so check for it explicitly. After the statement is accepted,
3906 the name is checked for especially in gfc_get_symbol(). */
3907 if (gfc_new_block != NULL && sym != NULL
3908 && strcmp (sym->name, gfc_new_block->name) == 0)
3910 gfc_error ("Name '%s' at %C is the name of the procedure",
3916 if (gfc_match_char (')') == MATCH_YES)
3919 m = gfc_match_char (',');
3922 gfc_error ("Unexpected junk in formal argument list at %C");
3928 /* Check for duplicate symbols in the formal argument list. */
3931 for (p = head; p->next; p = p->next)
3936 for (q = p->next; q; q = q->next)
3937 if (p->sym == q->sym)
3939 gfc_error ("Duplicate symbol '%s' in formal argument list "
3940 "at %C", p->sym->name);
3948 if (gfc_add_explicit_interface (progname, IFSRC_DECL, head, NULL)
3958 gfc_free_formal_arglist (head);
3963 /* Match a RESULT specification following a function declaration or
3964 ENTRY statement. Also matches the end-of-statement. */
3967 match_result (gfc_symbol *function, gfc_symbol **result)
3969 char name[GFC_MAX_SYMBOL_LEN + 1];
3973 if (gfc_match (" result (") != MATCH_YES)
3976 m = gfc_match_name (name);
3980 /* Get the right paren, and that's it because there could be the
3981 bind(c) attribute after the result clause. */
3982 if (gfc_match_char(')') != MATCH_YES)
3984 /* TODO: should report the missing right paren here. */
3988 if (strcmp (function->name, name) == 0)
3990 gfc_error ("RESULT variable at %C must be different than function name");
3994 if (gfc_get_symbol (name, NULL, &r))
3997 if (gfc_add_result (&r->attr, r->name, NULL) == FAILURE)
4006 /* Match a function suffix, which could be a combination of a result
4007 clause and BIND(C), either one, or neither. The draft does not
4008 require them to come in a specific order. */
4011 gfc_match_suffix (gfc_symbol *sym, gfc_symbol **result)
4013 match is_bind_c; /* Found bind(c). */
4014 match is_result; /* Found result clause. */
4015 match found_match; /* Status of whether we've found a good match. */
4016 char peek_char; /* Character we're going to peek at. */
4017 bool allow_binding_name;
4019 /* Initialize to having found nothing. */
4020 found_match = MATCH_NO;
4021 is_bind_c = MATCH_NO;
4022 is_result = MATCH_NO;
4024 /* Get the next char to narrow between result and bind(c). */
4025 gfc_gobble_whitespace ();
4026 peek_char = gfc_peek_ascii_char ();
4028 /* C binding names are not allowed for internal procedures. */
4029 if (gfc_current_state () == COMP_CONTAINS
4030 && sym->ns->proc_name->attr.flavor != FL_MODULE)
4031 allow_binding_name = false;
4033 allow_binding_name = true;
4038 /* Look for result clause. */
4039 is_result = match_result (sym, result);
4040 if (is_result == MATCH_YES)
4042 /* Now see if there is a bind(c) after it. */
4043 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
4044 /* We've found the result clause and possibly bind(c). */
4045 found_match = MATCH_YES;
4048 /* This should only be MATCH_ERROR. */
4049 found_match = is_result;
4052 /* Look for bind(c) first. */
4053 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
4054 if (is_bind_c == MATCH_YES)
4056 /* Now see if a result clause followed it. */
4057 is_result = match_result (sym, result);
4058 found_match = MATCH_YES;
4062 /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */
4063 found_match = MATCH_ERROR;
4067 gfc_error ("Unexpected junk after function declaration at %C");
4068 found_match = MATCH_ERROR;
4072 if (is_bind_c == MATCH_YES)
4074 /* Fortran 2008 draft allows BIND(C) for internal procedures. */
4075 if (gfc_current_state () == COMP_CONTAINS
4076 && sym->ns->proc_name->attr.flavor != FL_MODULE
4077 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute "
4078 "at %L may not be specified for an internal "
4079 "procedure", &gfc_current_locus)
4083 if (gfc_add_is_bind_c (&(sym->attr), sym->name, &gfc_current_locus, 1)
4092 /* Procedure pointer return value without RESULT statement:
4093 Add "hidden" result variable named "ppr@". */
4096 add_hidden_procptr_result (gfc_symbol *sym)
4100 if (gfc_notification_std (GFC_STD_F2003) == ERROR)
4103 /* First usage case: PROCEDURE and EXTERNAL statements. */
4104 case1 = gfc_current_state () == COMP_FUNCTION && gfc_current_block ()
4105 && strcmp (gfc_current_block ()->name, sym->name) == 0
4106 && sym->attr.external;
4107 /* Second usage case: INTERFACE statements. */
4108 case2 = gfc_current_state () == COMP_INTERFACE && gfc_state_stack->previous
4109 && gfc_state_stack->previous->state == COMP_FUNCTION
4110 && strcmp (gfc_state_stack->previous->sym->name, sym->name) == 0;
4116 gfc_get_sym_tree ("ppr@", gfc_current_ns, &stree, false);
4120 gfc_get_sym_tree ("ppr@", gfc_current_ns->parent, &stree, false);
4121 st2 = gfc_new_symtree (&gfc_current_ns->sym_root, "ppr@");
4122 st2->n.sym = stree->n.sym;
4124 sym->result = stree->n.sym;
4126 sym->result->attr.proc_pointer = sym->attr.proc_pointer;
4127 sym->result->attr.pointer = sym->attr.pointer;
4128 sym->result->attr.external = sym->attr.external;
4129 sym->result->attr.referenced = sym->attr.referenced;
4130 sym->result->ts = sym->ts;
4131 sym->attr.proc_pointer = 0;
4132 sym->attr.pointer = 0;
4133 sym->attr.external = 0;
4134 if (sym->result->attr.external && sym->result->attr.pointer)
4136 sym->result->attr.pointer = 0;
4137 sym->result->attr.proc_pointer = 1;
4140 return gfc_add_result (&sym->result->attr, sym->result->name, NULL);
4142 /* POINTER after PROCEDURE/EXTERNAL/INTERFACE statement. */
4143 else if (sym->attr.function && !sym->attr.external && sym->attr.pointer
4144 && sym->result && sym->result != sym && sym->result->attr.external
4145 && sym == gfc_current_ns->proc_name
4146 && sym == sym->result->ns->proc_name
4147 && strcmp ("ppr@", sym->result->name) == 0)
4149 sym->result->attr.proc_pointer = 1;
4150 sym->attr.pointer = 0;
4158 /* Match the interface for a PROCEDURE declaration,
4159 including brackets (R1212). */
4162 match_procedure_interface (gfc_symbol **proc_if)
4166 locus old_loc, entry_loc;
4167 gfc_namespace *old_ns = gfc_current_ns;
4168 char name[GFC_MAX_SYMBOL_LEN + 1];
4170 old_loc = entry_loc = gfc_current_locus;
4171 gfc_clear_ts (¤t_ts);
4173 if (gfc_match (" (") != MATCH_YES)
4175 gfc_current_locus = entry_loc;
4179 /* Get the type spec. for the procedure interface. */
4180 old_loc = gfc_current_locus;
4181 m = gfc_match_type_spec (¤t_ts, 0);
4182 gfc_gobble_whitespace ();
4183 if (m == MATCH_YES || (m == MATCH_NO && gfc_peek_ascii_char () == ')'))
4186 if (m == MATCH_ERROR)
4189 /* Procedure interface is itself a procedure. */
4190 gfc_current_locus = old_loc;
4191 m = gfc_match_name (name);
4193 /* First look to see if it is already accessible in the current
4194 namespace because it is use associated or contained. */
4196 if (gfc_find_sym_tree (name, NULL, 0, &st))
4199 /* If it is still not found, then try the parent namespace, if it
4200 exists and create the symbol there if it is still not found. */
4201 if (gfc_current_ns->parent)
4202 gfc_current_ns = gfc_current_ns->parent;
4203 if (st == NULL && gfc_get_ha_sym_tree (name, &st))
4206 gfc_current_ns = old_ns;
4207 *proc_if = st->n.sym;
4209 /* Various interface checks. */
4213 /* Resolve interface if possible. That way, attr.procedure is only set
4214 if it is declared by a later procedure-declaration-stmt, which is
4215 invalid per C1212. */
4216 while ((*proc_if)->ts.interface)
4217 *proc_if = (*proc_if)->ts.interface;
4219 if ((*proc_if)->generic)
4221 gfc_error ("Interface '%s' at %C may not be generic",
4225 if ((*proc_if)->attr.proc == PROC_ST_FUNCTION)
4227 gfc_error ("Interface '%s' at %C may not be a statement function",
4231 /* Handle intrinsic procedures. */
4232 if (!((*proc_if)->attr.external || (*proc_if)->attr.use_assoc
4233 || (*proc_if)->attr.if_source == IFSRC_IFBODY)
4234 && (gfc_is_intrinsic ((*proc_if), 0, gfc_current_locus)
4235 || gfc_is_intrinsic ((*proc_if), 1, gfc_current_locus)))
4236 (*proc_if)->attr.intrinsic = 1;
4237 if ((*proc_if)->attr.intrinsic
4238 && !gfc_intrinsic_actual_ok ((*proc_if)->name, 0))
4240 gfc_error ("Intrinsic procedure '%s' not allowed "
4241 "in PROCEDURE statement at %C", (*proc_if)->name);
4247 if (gfc_match (" )") != MATCH_YES)
4249 gfc_current_locus = entry_loc;
4257 /* Match a PROCEDURE declaration (R1211). */
4260 match_procedure_decl (void)
4263 gfc_symbol *sym, *proc_if = NULL;
4265 gfc_expr *initializer = NULL;
4267 /* Parse interface (with brackets). */
4268 m = match_procedure_interface (&proc_if);
4272 /* Parse attributes (with colons). */
4273 m = match_attr_spec();
4274 if (m == MATCH_ERROR)
4277 /* Get procedure symbols. */
4280 m = gfc_match_symbol (&sym, 0);
4283 else if (m == MATCH_ERROR)
4286 /* Add current_attr to the symbol attributes. */
4287 if (gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE)
4290 if (sym->attr.is_bind_c)
4292 /* Check for C1218. */
4293 if (!proc_if || !proc_if->attr.is_bind_c)
4295 gfc_error ("BIND(C) attribute at %C requires "
4296 "an interface with BIND(C)");
4299 /* Check for C1217. */
4300 if (has_name_equals && sym->attr.pointer)
4302 gfc_error ("BIND(C) procedure with NAME may not have "
4303 "POINTER attribute at %C");
4306 if (has_name_equals && sym->attr.dummy)
4308 gfc_error ("Dummy procedure at %C may not have "
4309 "BIND(C) attribute with NAME");
4312 /* Set binding label for BIND(C). */
4313 if (set_binding_label (sym->binding_label, sym->name, num) != SUCCESS)
4317 if (gfc_add_external (&sym->attr, NULL) == FAILURE)
4320 if (add_hidden_procptr_result (sym) == SUCCESS)
4323 if (gfc_add_proc (&sym->attr, sym->name, NULL) == FAILURE)
4326 /* Set interface. */
4327 if (proc_if != NULL)
4329 if (sym->ts.type != BT_UNKNOWN)
4331 gfc_error ("Procedure '%s' at %L already has basic type of %s",
4332 sym->name, &gfc_current_locus,
4333 gfc_basic_typename (sym->ts.type));
4336 sym->ts.interface = proc_if;
4337 sym->attr.untyped = 1;
4338 sym->attr.if_source = IFSRC_IFBODY;
4340 else if (current_ts.type != BT_UNKNOWN)
4342 if (gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE)
4344 sym->ts.interface = gfc_new_symbol ("", gfc_current_ns);
4345 sym->ts.interface->ts = current_ts;
4346 sym->ts.interface->attr.function = 1;
4347 sym->attr.function = sym->ts.interface->attr.function;
4348 sym->attr.if_source = IFSRC_UNKNOWN;
4351 if (gfc_match (" =>") == MATCH_YES)
4353 if (!current_attr.pointer)
4355 gfc_error ("Initialization at %C isn't for a pointer variable");
4360 m = gfc_match_null (&initializer);
4363 gfc_error ("Pointer initialization requires a NULL() at %C");
4367 if (gfc_pure (NULL))
4369 gfc_error ("Initialization of pointer at %C is not allowed in "
4370 "a PURE procedure");
4377 if (add_init_expr_to_sym (sym->name, &initializer, &gfc_current_locus)
4383 gfc_set_sym_referenced (sym);
4385 if (gfc_match_eos () == MATCH_YES)
4387 if (gfc_match_char (',') != MATCH_YES)
4392 gfc_error ("Syntax error in PROCEDURE statement at %C");
4396 /* Free stuff up and return. */
4397 gfc_free_expr (initializer);
4403 match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc);
4406 /* Match a procedure pointer component declaration (R445). */
4409 match_ppc_decl (void)
4412 gfc_symbol *proc_if = NULL;
4416 gfc_expr *initializer = NULL;
4417 gfc_typebound_proc* tb;
4418 char name[GFC_MAX_SYMBOL_LEN + 1];
4420 /* Parse interface (with brackets). */
4421 m = match_procedure_interface (&proc_if);
4425 /* Parse attributes. */
4426 tb = XCNEW (gfc_typebound_proc);
4427 tb->where = gfc_current_locus;
4428 m = match_binding_attributes (tb, false, true);
4429 if (m == MATCH_ERROR)
4432 gfc_clear_attr (¤t_attr);
4433 current_attr.procedure = 1;
4434 current_attr.proc_pointer = 1;
4435 current_attr.access = tb->access;
4436 current_attr.flavor = FL_PROCEDURE;
4438 /* Match the colons (required). */
4439 if (gfc_match (" ::") != MATCH_YES)
4441 gfc_error ("Expected '::' after binding-attributes at %C");
4445 /* Check for C450. */
4446 if (!tb->nopass && proc_if == NULL)
4448 gfc_error("NOPASS or explicit interface required at %C");
4452 /* Match PPC names. */
4456 m = gfc_match_name (name);
4459 else if (m == MATCH_ERROR)
4462 if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE)
4465 /* Add current_attr to the symbol attributes. */
4466 if (gfc_copy_attr (&c->attr, ¤t_attr, NULL) == FAILURE)
4469 if (gfc_add_external (&c->attr, NULL) == FAILURE)
4472 if (gfc_add_proc (&c->attr, name, NULL) == FAILURE)
4477 /* Set interface. */
4478 if (proc_if != NULL)
4480 c->ts.interface = proc_if;
4481 c->attr.untyped = 1;
4482 c->attr.if_source = IFSRC_IFBODY;
4484 else if (ts.type != BT_UNKNOWN)
4487 c->ts.interface = gfc_new_symbol ("", gfc_current_ns);
4488 c->ts.interface->ts = ts;
4489 c->ts.interface->attr.function = 1;
4490 c->attr.function = c->ts.interface->attr.function;
4491 c->attr.if_source = IFSRC_UNKNOWN;
4494 if (gfc_match (" =>") == MATCH_YES)
4496 m = gfc_match_null (&initializer);
4499 gfc_error ("Pointer initialization requires a NULL() at %C");
4502 if (gfc_pure (NULL))
4504 gfc_error ("Initialization of pointer at %C is not allowed in "
4505 "a PURE procedure");
4510 gfc_free_expr (initializer);
4513 c->initializer = initializer;
4516 if (gfc_match_eos () == MATCH_YES)
4518 if (gfc_match_char (',') != MATCH_YES)
4523 gfc_error ("Syntax error in procedure pointer component at %C");
4528 /* Match a PROCEDURE declaration inside an interface (R1206). */
4531 match_procedure_in_interface (void)
4535 char name[GFC_MAX_SYMBOL_LEN + 1];
4537 if (current_interface.type == INTERFACE_NAMELESS
4538 || current_interface.type == INTERFACE_ABSTRACT)
4540 gfc_error ("PROCEDURE at %C must be in a generic interface");
4546 m = gfc_match_name (name);
4549 else if (m == MATCH_ERROR)
4551 if (gfc_get_symbol (name, gfc_current_ns->parent, &sym))
4554 if (gfc_add_interface (sym) == FAILURE)
4557 if (gfc_match_eos () == MATCH_YES)
4559 if (gfc_match_char (',') != MATCH_YES)
4566 gfc_error ("Syntax error in PROCEDURE statement at %C");
4571 /* General matcher for PROCEDURE declarations. */
4573 static match match_procedure_in_type (void);
4576 gfc_match_procedure (void)
4580 switch (gfc_current_state ())
4585 case COMP_SUBROUTINE:
4587 m = match_procedure_decl ();
4589 case COMP_INTERFACE:
4590 m = match_procedure_in_interface ();
4593 m = match_ppc_decl ();
4595 case COMP_DERIVED_CONTAINS:
4596 m = match_procedure_in_type ();
4605 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROCEDURE statement at %C")
4613 /* Warn if a matched procedure has the same name as an intrinsic; this is
4614 simply a wrapper around gfc_warn_intrinsic_shadow that interprets the current
4615 parser-state-stack to find out whether we're in a module. */
4618 warn_intrinsic_shadow (const gfc_symbol* sym, bool func)
4622 in_module = (gfc_state_stack->previous
4623 && gfc_state_stack->previous->state == COMP_MODULE);
4625 gfc_warn_intrinsic_shadow (sym, in_module, func);
4629 /* Match a function declaration. */
4632 gfc_match_function_decl (void)
4634 char name[GFC_MAX_SYMBOL_LEN + 1];
4635 gfc_symbol *sym, *result;
4639 match found_match; /* Status returned by match func. */
4641 if (gfc_current_state () != COMP_NONE
4642 && gfc_current_state () != COMP_INTERFACE
4643 && gfc_current_state () != COMP_CONTAINS)
4646 gfc_clear_ts (¤t_ts);
4648 old_loc = gfc_current_locus;
4650 m = gfc_match_prefix (¤t_ts);
4653 gfc_current_locus = old_loc;
4657 if (gfc_match ("function% %n", name) != MATCH_YES)
4659 gfc_current_locus = old_loc;
4662 if (get_proc_name (name, &sym, false))
4665 if (add_hidden_procptr_result (sym) == SUCCESS)
4668 gfc_new_block = sym;
4670 m = gfc_match_formal_arglist (sym, 0, 0);
4673 gfc_error ("Expected formal argument list in function "
4674 "definition at %C");
4678 else if (m == MATCH_ERROR)
4683 /* According to the draft, the bind(c) and result clause can
4684 come in either order after the formal_arg_list (i.e., either
4685 can be first, both can exist together or by themselves or neither
4686 one). Therefore, the match_result can't match the end of the
4687 string, and check for the bind(c) or result clause in either order. */
4688 found_match = gfc_match_eos ();
4690 /* Make sure that it isn't already declared as BIND(C). If it is, it
4691 must have been marked BIND(C) with a BIND(C) attribute and that is
4692 not allowed for procedures. */
4693 if (sym->attr.is_bind_c == 1)
4695 sym->attr.is_bind_c = 0;
4696 if (sym->old_symbol != NULL)
4697 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4698 "variables or common blocks",
4699 &(sym->old_symbol->declared_at));
4701 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4702 "variables or common blocks", &gfc_current_locus);
4705 if (found_match != MATCH_YES)
4707 /* If we haven't found the end-of-statement, look for a suffix. */
4708 suffix_match = gfc_match_suffix (sym, &result);
4709 if (suffix_match == MATCH_YES)
4710 /* Need to get the eos now. */
4711 found_match = gfc_match_eos ();
4713 found_match = suffix_match;
4716 if(found_match != MATCH_YES)
4720 /* Make changes to the symbol. */
4723 if (gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE)
4726 if (gfc_missing_attr (&sym->attr, NULL) == FAILURE
4727 || copy_prefix (&sym->attr, &sym->declared_at) == FAILURE)
4730 /* Delay matching the function characteristics until after the
4731 specification block by signalling kind=-1. */
4732 sym->declared_at = old_loc;
4733 if (current_ts.type != BT_UNKNOWN)
4734 current_ts.kind = -1;
4736 current_ts.kind = 0;
4740 if (current_ts.type != BT_UNKNOWN
4741 && gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE)
4747 if (current_ts.type != BT_UNKNOWN
4748 && gfc_add_type (result, ¤t_ts, &gfc_current_locus)
4751 sym->result = result;
4754 /* Warn if this procedure has the same name as an intrinsic. */
4755 warn_intrinsic_shadow (sym, true);
4761 gfc_current_locus = old_loc;
4766 /* This is mostly a copy of parse.c(add_global_procedure) but modified to
4767 pass the name of the entry, rather than the gfc_current_block name, and
4768 to return false upon finding an existing global entry. */
4771 add_global_entry (const char *name, int sub)
4774 enum gfc_symbol_type type;
4776 s = gfc_get_gsymbol(name);
4777 type = sub ? GSYM_SUBROUTINE : GSYM_FUNCTION;
4780 || (s->type != GSYM_UNKNOWN
4781 && s->type != type))
4782 gfc_global_used(s, NULL);
4786 s->where = gfc_current_locus;
4788 s->ns = gfc_current_ns;
4795 /* Match an ENTRY statement. */
4798 gfc_match_entry (void)
4803 char name[GFC_MAX_SYMBOL_LEN + 1];
4804 gfc_compile_state state;
4808 bool module_procedure;
4812 m = gfc_match_name (name);
4816 state = gfc_current_state ();
4817 if (state != COMP_SUBROUTINE && state != COMP_FUNCTION)
4822 gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM");
4825 gfc_error ("ENTRY statement at %C cannot appear within a MODULE");
4827 case COMP_BLOCK_DATA:
4828 gfc_error ("ENTRY statement at %C cannot appear within "
4831 case COMP_INTERFACE:
4832 gfc_error ("ENTRY statement at %C cannot appear within "
4836 gfc_error ("ENTRY statement at %C cannot appear within "
4837 "a DERIVED TYPE block");
4840 gfc_error ("ENTRY statement at %C cannot appear within "
4841 "an IF-THEN block");
4844 gfc_error ("ENTRY statement at %C cannot appear within "
4848 gfc_error ("ENTRY statement at %C cannot appear within "
4852 gfc_error ("ENTRY statement at %C cannot appear within "
4856 gfc_error ("ENTRY statement at %C cannot appear within "
4860 gfc_error ("ENTRY statement at %C cannot appear within "
4861 "a contained subprogram");
4864 gfc_internal_error ("gfc_match_entry(): Bad state");
4869 module_procedure = gfc_current_ns->parent != NULL
4870 && gfc_current_ns->parent->proc_name
4871 && gfc_current_ns->parent->proc_name->attr.flavor
4874 if (gfc_current_ns->parent != NULL
4875 && gfc_current_ns->parent->proc_name
4876 && !module_procedure)
4878 gfc_error("ENTRY statement at %C cannot appear in a "
4879 "contained procedure");
4883 /* Module function entries need special care in get_proc_name
4884 because previous references within the function will have
4885 created symbols attached to the current namespace. */
4886 if (get_proc_name (name, &entry,
4887 gfc_current_ns->parent != NULL
4888 && module_procedure))
4891 proc = gfc_current_block ();
4893 /* Make sure that it isn't already declared as BIND(C). If it is, it
4894 must have been marked BIND(C) with a BIND(C) attribute and that is
4895 not allowed for procedures. */
4896 if (entry->attr.is_bind_c == 1)
4898 entry->attr.is_bind_c = 0;
4899 if (entry->old_symbol != NULL)
4900 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4901 "variables or common blocks",
4902 &(entry->old_symbol->declared_at));
4904 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4905 "variables or common blocks", &gfc_current_locus);
4908 /* Check what next non-whitespace character is so we can tell if there
4909 is the required parens if we have a BIND(C). */
4910 gfc_gobble_whitespace ();
4911 peek_char = gfc_peek_ascii_char ();
4913 if (state == COMP_SUBROUTINE)
4915 /* An entry in a subroutine. */
4916 if (!gfc_current_ns->parent && !add_global_entry (name, 1))
4919 m = gfc_match_formal_arglist (entry, 0, 1);
4923 /* Call gfc_match_bind_c with allow_binding_name = true as ENTRY can
4924 never be an internal procedure. */
4925 is_bind_c = gfc_match_bind_c (entry, true);
4926 if (is_bind_c == MATCH_ERROR)
4928 if (is_bind_c == MATCH_YES)
4930 if (peek_char != '(')
4932 gfc_error ("Missing required parentheses before BIND(C) at %C");
4935 if (gfc_add_is_bind_c (&(entry->attr), entry->name, &(entry->declared_at), 1)
4940 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
4941 || gfc_add_subroutine (&entry->attr, entry->name, NULL) == FAILURE)
4946 /* An entry in a function.
4947 We need to take special care because writing
4952 ENTRY f() RESULT (r)
4954 ENTRY f RESULT (r). */
4955 if (!gfc_current_ns->parent && !add_global_entry (name, 0))
4958 old_loc = gfc_current_locus;
4959 if (gfc_match_eos () == MATCH_YES)
4961 gfc_current_locus = old_loc;
4962 /* Match the empty argument list, and add the interface to
4964 m = gfc_match_formal_arglist (entry, 0, 1);
4967 m = gfc_match_formal_arglist (entry, 0, 0);
4974 if (gfc_match_eos () == MATCH_YES)
4976 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
4977 || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE)
4980 entry->result = entry;
4984 m = gfc_match_suffix (entry, &result);
4986 gfc_syntax_error (ST_ENTRY);
4992 if (gfc_add_result (&result->attr, result->name, NULL) == FAILURE
4993 || gfc_add_entry (&entry->attr, result->name, NULL) == FAILURE
4994 || gfc_add_function (&entry->attr, result->name, NULL)
4997 entry->result = result;
5001 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
5002 || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE)
5004 entry->result = entry;
5009 if (gfc_match_eos () != MATCH_YES)
5011 gfc_syntax_error (ST_ENTRY);
5015 entry->attr.recursive = proc->attr.recursive;
5016 entry->attr.elemental = proc->attr.elemental;
5017 entry->attr.pure = proc->attr.pure;
5019 el = gfc_get_entry_list ();
5021 el->next = gfc_current_ns->entries;
5022 gfc_current_ns->entries = el;
5024 el->id = el->next->id + 1;
5028 new_st.op = EXEC_ENTRY;
5029 new_st.ext.entry = el;
5035 /* Match a subroutine statement, including optional prefixes. */
5038 gfc_match_subroutine (void)
5040 char name[GFC_MAX_SYMBOL_LEN + 1];
5045 bool allow_binding_name;
5047 if (gfc_current_state () != COMP_NONE
5048 && gfc_current_state () != COMP_INTERFACE
5049 && gfc_current_state () != COMP_CONTAINS)
5052 m = gfc_match_prefix (NULL);
5056 m = gfc_match ("subroutine% %n", name);
5060 if (get_proc_name (name, &sym, false))
5063 if (add_hidden_procptr_result (sym) == SUCCESS)
5066 gfc_new_block = sym;
5068 /* Check what next non-whitespace character is so we can tell if there
5069 is the required parens if we have a BIND(C). */
5070 gfc_gobble_whitespace ();
5071 peek_char = gfc_peek_ascii_char ();
5073 if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE)
5076 if (gfc_match_formal_arglist (sym, 0, 1) != MATCH_YES)
5079 /* Make sure that it isn't already declared as BIND(C). If it is, it
5080 must have been marked BIND(C) with a BIND(C) attribute and that is
5081 not allowed for procedures. */
5082 if (sym->attr.is_bind_c == 1)
5084 sym->attr.is_bind_c = 0;
5085 if (sym->old_symbol != NULL)
5086 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5087 "variables or common blocks",
5088 &(sym->old_symbol->declared_at));
5090 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5091 "variables or common blocks", &gfc_current_locus);
5094 /* C binding names are not allowed for internal procedures. */
5095 if (gfc_current_state () == COMP_CONTAINS
5096 && sym->ns->proc_name->attr.flavor != FL_MODULE)
5097 allow_binding_name = false;
5099 allow_binding_name = true;
5101 /* Here, we are just checking if it has the bind(c) attribute, and if
5102 so, then we need to make sure it's all correct. If it doesn't,
5103 we still need to continue matching the rest of the subroutine line. */
5104 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
5105 if (is_bind_c == MATCH_ERROR)
5107 /* There was an attempt at the bind(c), but it was wrong. An
5108 error message should have been printed w/in the gfc_match_bind_c
5109 so here we'll just return the MATCH_ERROR. */
5113 if (is_bind_c == MATCH_YES)
5115 /* The following is allowed in the Fortran 2008 draft. */
5116 if (gfc_current_state () == COMP_CONTAINS
5117 && sym->ns->proc_name->attr.flavor != FL_MODULE
5118 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute "
5119 "at %L may not be specified for an internal "
5120 "procedure", &gfc_current_locus)
5124 if (peek_char != '(')
5126 gfc_error ("Missing required parentheses before BIND(C) at %C");
5129 if (gfc_add_is_bind_c (&(sym->attr), sym->name, &(sym->declared_at), 1)
5134 if (gfc_match_eos () != MATCH_YES)
5136 gfc_syntax_error (ST_SUBROUTINE);
5140 if (copy_prefix (&sym->attr, &sym->declared_at) == FAILURE)
5143 /* Warn if it has the same name as an intrinsic. */
5144 warn_intrinsic_shadow (sym, false);
5150 /* Match a BIND(C) specifier, with the optional 'name=' specifier if
5151 given, and set the binding label in either the given symbol (if not
5152 NULL), or in the current_ts. The symbol may be NULL because we may
5153 encounter the BIND(C) before the declaration itself. Return
5154 MATCH_NO if what we're looking at isn't a BIND(C) specifier,
5155 MATCH_ERROR if it is a BIND(C) clause but an error was encountered,
5156 or MATCH_YES if the specifier was correct and the binding label and
5157 bind(c) fields were set correctly for the given symbol or the
5158 current_ts. If allow_binding_name is false, no binding name may be
5162 gfc_match_bind_c (gfc_symbol *sym, bool allow_binding_name)
5164 /* binding label, if exists */
5165 char binding_label[GFC_MAX_SYMBOL_LEN + 1];
5169 /* Initialize the flag that specifies whether we encountered a NAME=
5170 specifier or not. */
5171 has_name_equals = 0;
5173 /* Init the first char to nil so we can catch if we don't have
5174 the label (name attr) or the symbol name yet. */
5175 binding_label[0] = '\0';
5177 /* This much we have to be able to match, in this order, if
5178 there is a bind(c) label. */
5179 if (gfc_match (" bind ( c ") != MATCH_YES)
5182 /* Now see if there is a binding label, or if we've reached the
5183 end of the bind(c) attribute without one. */
5184 if (gfc_match_char (',') == MATCH_YES)
5186 if (gfc_match (" name = ") != MATCH_YES)
5188 gfc_error ("Syntax error in NAME= specifier for binding label "
5190 /* should give an error message here */
5194 has_name_equals = 1;
5196 /* Get the opening quote. */
5197 double_quote = MATCH_YES;
5198 single_quote = MATCH_YES;
5199 double_quote = gfc_match_char ('"');
5200 if (double_quote != MATCH_YES)
5201 single_quote = gfc_match_char ('\'');
5202 if (double_quote != MATCH_YES && single_quote != MATCH_YES)
5204 gfc_error ("Syntax error in NAME= specifier for binding label "
5209 /* Grab the binding label, using functions that will not lower
5210 case the names automatically. */
5211 if (gfc_match_name_C (binding_label) != MATCH_YES)
5214 /* Get the closing quotation. */
5215 if (double_quote == MATCH_YES)
5217 if (gfc_match_char ('"') != MATCH_YES)
5219 gfc_error ("Missing closing quote '\"' for binding label at %C");
5220 /* User started string with '"' so looked to match it. */
5226 if (gfc_match_char ('\'') != MATCH_YES)
5228 gfc_error ("Missing closing quote '\'' for binding label at %C");
5229 /* User started string with "'" char. */
5235 /* Get the required right paren. */
5236 if (gfc_match_char (')') != MATCH_YES)
5238 gfc_error ("Missing closing paren for binding label at %C");
5242 if (has_name_equals && !allow_binding_name)
5244 gfc_error ("No binding name is allowed in BIND(C) at %C");
5248 if (has_name_equals && sym != NULL && sym->attr.dummy)
5250 gfc_error ("For dummy procedure %s, no binding name is "
5251 "allowed in BIND(C) at %C", sym->name);
5256 /* Save the binding label to the symbol. If sym is null, we're
5257 probably matching the typespec attributes of a declaration and
5258 haven't gotten the name yet, and therefore, no symbol yet. */
5259 if (binding_label[0] != '\0')
5263 strcpy (sym->binding_label, binding_label);
5266 strcpy (curr_binding_label, binding_label);
5268 else if (allow_binding_name)
5270 /* No binding label, but if symbol isn't null, we
5271 can set the label for it here.
5272 If name="" or allow_binding_name is false, no C binding name is
5274 if (sym != NULL && sym->name != NULL && has_name_equals == 0)
5275 strncpy (sym->binding_label, sym->name, strlen (sym->name) + 1);
5278 if (has_name_equals && gfc_current_state () == COMP_INTERFACE
5279 && current_interface.type == INTERFACE_ABSTRACT)
5281 gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C");
5289 /* Return nonzero if we're currently compiling a contained procedure. */
5292 contained_procedure (void)
5294 gfc_state_data *s = gfc_state_stack;
5296 if ((s->state == COMP_SUBROUTINE || s->state == COMP_FUNCTION)
5297 && s->previous != NULL && s->previous->state == COMP_CONTAINS)
5303 /* Set the kind of each enumerator. The kind is selected such that it is
5304 interoperable with the corresponding C enumeration type, making
5305 sure that -fshort-enums is honored. */
5310 enumerator_history *current_history = NULL;
5314 if (max_enum == NULL || enum_history == NULL)
5317 if (!flag_short_enums)
5323 kind = gfc_integer_kinds[i++].kind;
5325 while (kind < gfc_c_int_kind
5326 && gfc_check_integer_range (max_enum->initializer->value.integer,
5329 current_history = enum_history;
5330 while (current_history != NULL)
5332 current_history->sym->ts.kind = kind;
5333 current_history = current_history->next;
5338 /* Match any of the various end-block statements. Returns the type of
5339 END to the caller. The END INTERFACE, END IF, END DO and END
5340 SELECT statements cannot be replaced by a single END statement. */
5343 gfc_match_end (gfc_statement *st)
5345 char name[GFC_MAX_SYMBOL_LEN + 1];
5346 gfc_compile_state state;
5348 const char *block_name;
5353 old_loc = gfc_current_locus;
5354 if (gfc_match ("end") != MATCH_YES)
5357 state = gfc_current_state ();
5358 block_name = gfc_current_block () == NULL
5359 ? NULL : gfc_current_block ()->name;
5361 if (state == COMP_CONTAINS || state == COMP_DERIVED_CONTAINS)
5363 state = gfc_state_stack->previous->state;
5364 block_name = gfc_state_stack->previous->sym == NULL
5365 ? NULL : gfc_state_stack->previous->sym->name;
5372 *st = ST_END_PROGRAM;
5373 target = " program";
5377 case COMP_SUBROUTINE:
5378 *st = ST_END_SUBROUTINE;
5379 target = " subroutine";
5380 eos_ok = !contained_procedure ();
5384 *st = ST_END_FUNCTION;
5385 target = " function";
5386 eos_ok = !contained_procedure ();
5389 case COMP_BLOCK_DATA:
5390 *st = ST_END_BLOCK_DATA;
5391 target = " block data";
5396 *st = ST_END_MODULE;
5401 case COMP_INTERFACE:
5402 *st = ST_END_INTERFACE;
5403 target = " interface";
5408 case COMP_DERIVED_CONTAINS:
5427 *st = ST_END_SELECT;
5433 *st = ST_END_FORALL;
5448 last_initializer = NULL;
5450 gfc_free_enum_history ();
5454 gfc_error ("Unexpected END statement at %C");
5458 if (gfc_match_eos () == MATCH_YES)
5462 /* We would have required END [something]. */
5463 gfc_error ("%s statement expected at %L",
5464 gfc_ascii_statement (*st), &old_loc);
5471 /* Verify that we've got the sort of end-block that we're expecting. */
5472 if (gfc_match (target) != MATCH_YES)
5474 gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st));
5478 /* If we're at the end, make sure a block name wasn't required. */
5479 if (gfc_match_eos () == MATCH_YES)
5482 if (*st != ST_ENDDO && *st != ST_ENDIF && *st != ST_END_SELECT
5483 && *st != ST_END_FORALL && *st != ST_END_WHERE)
5486 if (gfc_current_block () == NULL)
5489 gfc_error ("Expected block name of '%s' in %s statement at %C",
5490 block_name, gfc_ascii_statement (*st));
5495 /* END INTERFACE has a special handler for its several possible endings. */
5496 if (*st == ST_END_INTERFACE)
5497 return gfc_match_end_interface ();
5499 /* We haven't hit the end of statement, so what is left must be an
5501 m = gfc_match_space ();
5503 m = gfc_match_name (name);
5506 gfc_error ("Expected terminating name at %C");
5510 if (block_name == NULL)
5513 if (strcmp (name, block_name) != 0 && strcmp (block_name, "ppr@") != 0)
5515 gfc_error ("Expected label '%s' for %s statement at %C", block_name,
5516 gfc_ascii_statement (*st));
5519 /* Procedure pointer as function result. */
5520 else if (strcmp (block_name, "ppr@") == 0
5521 && strcmp (name, gfc_current_block ()->ns->proc_name->name) != 0)
5523 gfc_error ("Expected label '%s' for %s statement at %C",
5524 gfc_current_block ()->ns->proc_name->name,
5525 gfc_ascii_statement (*st));
5529 if (gfc_match_eos () == MATCH_YES)
5533 gfc_syntax_error (*st);
5536 gfc_current_locus = old_loc;
5542 /***************** Attribute declaration statements ****************/
5544 /* Set the attribute of a single variable. */
5549 char name[GFC_MAX_SYMBOL_LEN + 1];
5557 m = gfc_match_name (name);
5561 if (find_special (name, &sym, false))
5564 var_locus = gfc_current_locus;
5566 /* Deal with possible array specification for certain attributes. */
5567 if (current_attr.dimension
5568 || current_attr.allocatable
5569 || current_attr.pointer
5570 || current_attr.target)
5572 m = gfc_match_array_spec (&as);
5573 if (m == MATCH_ERROR)
5576 if (current_attr.dimension && m == MATCH_NO)
5578 gfc_error ("Missing array specification at %L in DIMENSION "
5579 "statement", &var_locus);
5584 if (current_attr.dimension && sym->value)
5586 gfc_error ("Dimensions specified for %s at %L after its "
5587 "initialisation", sym->name, &var_locus);
5592 if ((current_attr.allocatable || current_attr.pointer)
5593 && (m == MATCH_YES) && (as->type != AS_DEFERRED))
5595 gfc_error ("Array specification must be deferred at %L", &var_locus);
5601 /* Update symbol table. DIMENSION attribute is set
5602 in gfc_set_array_spec(). */
5603 if (current_attr.dimension == 0
5604 && gfc_copy_attr (&sym->attr, ¤t_attr, &var_locus) == FAILURE)
5610 if (gfc_set_array_spec (sym, as, &var_locus) == FAILURE)
5616 if (sym->attr.cray_pointee && sym->as != NULL)
5618 /* Fix the array spec. */
5619 m = gfc_mod_pointee_as (sym->as);
5620 if (m == MATCH_ERROR)
5624 if (gfc_add_attribute (&sym->attr, &var_locus) == FAILURE)
5630 if ((current_attr.external || current_attr.intrinsic)
5631 && sym->attr.flavor != FL_PROCEDURE
5632 && gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL) == FAILURE)
5638 add_hidden_procptr_result (sym);
5643 gfc_free_array_spec (as);
5648 /* Generic attribute declaration subroutine. Used for attributes that
5649 just have a list of names. */
5656 /* Gobble the optional double colon, by simply ignoring the result
5666 if (gfc_match_eos () == MATCH_YES)
5672 if (gfc_match_char (',') != MATCH_YES)
5674 gfc_error ("Unexpected character in variable list at %C");
5684 /* This routine matches Cray Pointer declarations of the form:
5685 pointer ( <pointer>, <pointee> )
5687 pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ...
5688 The pointer, if already declared, should be an integer. Otherwise, we
5689 set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may
5690 be either a scalar, or an array declaration. No space is allocated for
5691 the pointee. For the statement
5692 pointer (ipt, ar(10))
5693 any subsequent uses of ar will be translated (in C-notation) as
5694 ar(i) => ((<type> *) ipt)(i)
5695 After gimplification, pointee variable will disappear in the code. */
5698 cray_pointer_decl (void)
5702 gfc_symbol *cptr; /* Pointer symbol. */
5703 gfc_symbol *cpte; /* Pointee symbol. */
5709 if (gfc_match_char ('(') != MATCH_YES)
5711 gfc_error ("Expected '(' at %C");
5715 /* Match pointer. */
5716 var_locus = gfc_current_locus;
5717 gfc_clear_attr (¤t_attr);
5718 gfc_add_cray_pointer (¤t_attr, &var_locus);
5719 current_ts.type = BT_INTEGER;
5720 current_ts.kind = gfc_index_integer_kind;
5722 m = gfc_match_symbol (&cptr, 0);
5725 gfc_error ("Expected variable name at %C");
5729 if (gfc_add_cray_pointer (&cptr->attr, &var_locus) == FAILURE)
5732 gfc_set_sym_referenced (cptr);
5734 if (cptr->ts.type == BT_UNKNOWN) /* Override the type, if necessary. */
5736 cptr->ts.type = BT_INTEGER;
5737 cptr->ts.kind = gfc_index_integer_kind;
5739 else if (cptr->ts.type != BT_INTEGER)
5741 gfc_error ("Cray pointer at %C must be an integer");
5744 else if (cptr->ts.kind < gfc_index_integer_kind)
5745 gfc_warning ("Cray pointer at %C has %d bytes of precision;"
5746 " memory addresses require %d bytes",
5747 cptr->ts.kind, gfc_index_integer_kind);
5749 if (gfc_match_char (',') != MATCH_YES)
5751 gfc_error ("Expected \",\" at %C");
5755 /* Match Pointee. */
5756 var_locus = gfc_current_locus;
5757 gfc_clear_attr (¤t_attr);
5758 gfc_add_cray_pointee (¤t_attr, &var_locus);
5759 current_ts.type = BT_UNKNOWN;
5760 current_ts.kind = 0;
5762 m = gfc_match_symbol (&cpte, 0);
5765 gfc_error ("Expected variable name at %C");
5769 /* Check for an optional array spec. */
5770 m = gfc_match_array_spec (&as);
5771 if (m == MATCH_ERROR)
5773 gfc_free_array_spec (as);
5776 else if (m == MATCH_NO)
5778 gfc_free_array_spec (as);
5782 if (gfc_add_cray_pointee (&cpte->attr, &var_locus) == FAILURE)
5785 gfc_set_sym_referenced (cpte);
5787 if (cpte->as == NULL)
5789 if (gfc_set_array_spec (cpte, as, &var_locus) == FAILURE)
5790 gfc_internal_error ("Couldn't set Cray pointee array spec.");
5792 else if (as != NULL)
5794 gfc_error ("Duplicate array spec for Cray pointee at %C");
5795 gfc_free_array_spec (as);
5801 if (cpte->as != NULL)
5803 /* Fix array spec. */
5804 m = gfc_mod_pointee_as (cpte->as);
5805 if (m == MATCH_ERROR)
5809 /* Point the Pointee at the Pointer. */
5810 cpte->cp_pointer = cptr;
5812 if (gfc_match_char (')') != MATCH_YES)
5814 gfc_error ("Expected \")\" at %C");
5817 m = gfc_match_char (',');
5819 done = true; /* Stop searching for more declarations. */
5823 if (m == MATCH_ERROR /* Failed when trying to find ',' above. */
5824 || gfc_match_eos () != MATCH_YES)
5826 gfc_error ("Expected \",\" or end of statement at %C");
5834 gfc_match_external (void)
5837 gfc_clear_attr (¤t_attr);
5838 current_attr.external = 1;
5840 return attr_decl ();
5845 gfc_match_intent (void)
5849 intent = match_intent_spec ();
5850 if (intent == INTENT_UNKNOWN)
5853 gfc_clear_attr (¤t_attr);
5854 current_attr.intent = intent;
5856 return attr_decl ();
5861 gfc_match_intrinsic (void)
5864 gfc_clear_attr (¤t_attr);
5865 current_attr.intrinsic = 1;
5867 return attr_decl ();
5872 gfc_match_optional (void)
5875 gfc_clear_attr (¤t_attr);
5876 current_attr.optional = 1;
5878 return attr_decl ();
5883 gfc_match_pointer (void)
5885 gfc_gobble_whitespace ();
5886 if (gfc_peek_ascii_char () == '(')
5888 if (!gfc_option.flag_cray_pointer)
5890 gfc_error ("Cray pointer declaration at %C requires -fcray-pointer "
5894 return cray_pointer_decl ();
5898 gfc_clear_attr (¤t_attr);
5899 current_attr.pointer = 1;
5901 return attr_decl ();
5907 gfc_match_allocatable (void)
5909 gfc_clear_attr (¤t_attr);
5910 current_attr.allocatable = 1;
5912 return attr_decl ();
5917 gfc_match_dimension (void)
5919 gfc_clear_attr (¤t_attr);
5920 current_attr.dimension = 1;
5922 return attr_decl ();
5927 gfc_match_target (void)
5929 gfc_clear_attr (¤t_attr);
5930 current_attr.target = 1;
5932 return attr_decl ();
5936 /* Match the list of entities being specified in a PUBLIC or PRIVATE
5940 access_attr_decl (gfc_statement st)
5942 char name[GFC_MAX_SYMBOL_LEN + 1];
5943 interface_type type;
5946 gfc_intrinsic_op op;
5949 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
5954 m = gfc_match_generic_spec (&type, name, &op);
5957 if (m == MATCH_ERROR)
5962 case INTERFACE_NAMELESS:
5963 case INTERFACE_ABSTRACT:
5966 case INTERFACE_GENERIC:
5967 if (gfc_get_symbol (name, NULL, &sym))
5970 if (gfc_add_access (&sym->attr, (st == ST_PUBLIC)
5971 ? ACCESS_PUBLIC : ACCESS_PRIVATE,
5972 sym->name, NULL) == FAILURE)
5977 case INTERFACE_INTRINSIC_OP:
5978 if (gfc_current_ns->operator_access[op] == ACCESS_UNKNOWN)
5980 gfc_current_ns->operator_access[op] =
5981 (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE;
5985 gfc_error ("Access specification of the %s operator at %C has "
5986 "already been specified", gfc_op2string (op));
5992 case INTERFACE_USER_OP:
5993 uop = gfc_get_uop (name);
5995 if (uop->access == ACCESS_UNKNOWN)
5997 uop->access = (st == ST_PUBLIC)
5998 ? ACCESS_PUBLIC : ACCESS_PRIVATE;
6002 gfc_error ("Access specification of the .%s. operator at %C "
6003 "has already been specified", sym->name);
6010 if (gfc_match_char (',') == MATCH_NO)
6014 if (gfc_match_eos () != MATCH_YES)
6019 gfc_syntax_error (st);
6027 gfc_match_protected (void)
6032 if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE)
6034 gfc_error ("PROTECTED at %C only allowed in specification "
6035 "part of a module");
6040 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED statement at %C")
6044 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6049 if (gfc_match_eos () == MATCH_YES)
6054 m = gfc_match_symbol (&sym, 0);
6058 if (gfc_add_protected (&sym->attr, sym->name, &gfc_current_locus)
6071 if (gfc_match_eos () == MATCH_YES)
6073 if (gfc_match_char (',') != MATCH_YES)
6080 gfc_error ("Syntax error in PROTECTED statement at %C");
6085 /* The PRIVATE statement is a bit weird in that it can be an attribute
6086 declaration, but also works as a standalone statement inside of a
6087 type declaration or a module. */
6090 gfc_match_private (gfc_statement *st)
6093 if (gfc_match ("private") != MATCH_YES)
6096 if (gfc_current_state () != COMP_MODULE
6097 && !(gfc_current_state () == COMP_DERIVED
6098 && gfc_state_stack->previous
6099 && gfc_state_stack->previous->state == COMP_MODULE)
6100 && !(gfc_current_state () == COMP_DERIVED_CONTAINS
6101 && gfc_state_stack->previous && gfc_state_stack->previous->previous
6102 && gfc_state_stack->previous->previous->state == COMP_MODULE))
6104 gfc_error ("PRIVATE statement at %C is only allowed in the "
6105 "specification part of a module");
6109 if (gfc_current_state () == COMP_DERIVED)
6111 if (gfc_match_eos () == MATCH_YES)
6117 gfc_syntax_error (ST_PRIVATE);
6121 if (gfc_match_eos () == MATCH_YES)
6128 return access_attr_decl (ST_PRIVATE);
6133 gfc_match_public (gfc_statement *st)
6136 if (gfc_match ("public") != MATCH_YES)
6139 if (gfc_current_state () != COMP_MODULE)
6141 gfc_error ("PUBLIC statement at %C is only allowed in the "
6142 "specification part of a module");
6146 if (gfc_match_eos () == MATCH_YES)
6153 return access_attr_decl (ST_PUBLIC);
6157 /* Workhorse for gfc_match_parameter. */
6166 m = gfc_match_symbol (&sym, 0);
6168 gfc_error ("Expected variable name at %C in PARAMETER statement");
6173 if (gfc_match_char ('=') == MATCH_NO)
6175 gfc_error ("Expected = sign in PARAMETER statement at %C");
6179 m = gfc_match_init_expr (&init);
6181 gfc_error ("Expected expression at %C in PARAMETER statement");
6185 if (sym->ts.type == BT_UNKNOWN
6186 && gfc_set_default_type (sym, 1, NULL) == FAILURE)
6192 if (gfc_check_assign_symbol (sym, init) == FAILURE
6193 || gfc_add_flavor (&sym->attr, FL_PARAMETER, sym->name, NULL) == FAILURE)
6201 gfc_error ("Initializing already initialized variable at %C");
6206 if (sym->ts.type == BT_CHARACTER
6207 && sym->ts.u.cl != NULL
6208 && sym->ts.u.cl->length != NULL
6209 && sym->ts.u.cl->length->expr_type == EXPR_CONSTANT
6210 && init->expr_type == EXPR_CONSTANT
6211 && init->ts.type == BT_CHARACTER)
6212 gfc_set_constant_character_len (
6213 mpz_get_si (sym->ts.u.cl->length->value.integer), init, -1);
6214 else if (sym->ts.type == BT_CHARACTER && sym->ts.u.cl != NULL
6215 && sym->ts.u.cl->length == NULL)
6218 if (init->expr_type == EXPR_CONSTANT)
6220 clen = init->value.character.length;
6221 sym->ts.u.cl->length = gfc_int_expr (clen);
6223 else if (init->expr_type == EXPR_ARRAY)
6225 gfc_expr *p = init->value.constructor->expr;
6226 clen = p->value.character.length;
6227 sym->ts.u.cl->length = gfc_int_expr (clen);
6229 else if (init->ts.u.cl && init->ts.u.cl->length)
6230 sym->ts.u.cl->length = gfc_copy_expr (sym->value->ts.u.cl->length);
6237 gfc_free_expr (init);
6242 /* Match a parameter statement, with the weird syntax that these have. */
6245 gfc_match_parameter (void)
6249 if (gfc_match_char ('(') == MATCH_NO)
6258 if (gfc_match (" )%t") == MATCH_YES)
6261 if (gfc_match_char (',') != MATCH_YES)
6263 gfc_error ("Unexpected characters in PARAMETER statement at %C");
6273 /* Save statements have a special syntax. */
6276 gfc_match_save (void)
6278 char n[GFC_MAX_SYMBOL_LEN+1];
6283 if (gfc_match_eos () == MATCH_YES)
6285 if (gfc_current_ns->seen_save)
6287 if (gfc_notify_std (GFC_STD_LEGACY, "Blanket SAVE statement at %C "
6288 "follows previous SAVE statement")
6293 gfc_current_ns->save_all = gfc_current_ns->seen_save = 1;
6297 if (gfc_current_ns->save_all)
6299 if (gfc_notify_std (GFC_STD_LEGACY, "SAVE statement at %C follows "
6300 "blanket SAVE statement")
6309 m = gfc_match_symbol (&sym, 0);
6313 if (gfc_add_save (&sym->attr, sym->name, &gfc_current_locus)
6325 m = gfc_match (" / %n /", &n);
6326 if (m == MATCH_ERROR)
6331 c = gfc_get_common (n, 0);
6334 gfc_current_ns->seen_save = 1;
6337 if (gfc_match_eos () == MATCH_YES)
6339 if (gfc_match_char (',') != MATCH_YES)
6346 gfc_error ("Syntax error in SAVE statement at %C");
6352 gfc_match_value (void)
6357 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE statement at %C")
6361 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6366 if (gfc_match_eos () == MATCH_YES)
6371 m = gfc_match_symbol (&sym, 0);
6375 if (gfc_add_value (&sym->attr, sym->name, &gfc_current_locus)
6388 if (gfc_match_eos () == MATCH_YES)
6390 if (gfc_match_char (',') != MATCH_YES)
6397 gfc_error ("Syntax error in VALUE statement at %C");
6403 gfc_match_volatile (void)
6408 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VOLATILE statement at %C")
6412 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6417 if (gfc_match_eos () == MATCH_YES)
6422 /* VOLATILE is special because it can be added to host-associated
6424 m = gfc_match_symbol (&sym, 1);
6428 if (gfc_add_volatile (&sym->attr, sym->name, &gfc_current_locus)
6441 if (gfc_match_eos () == MATCH_YES)
6443 if (gfc_match_char (',') != MATCH_YES)
6450 gfc_error ("Syntax error in VOLATILE statement at %C");
6455 /* Match a module procedure statement. Note that we have to modify
6456 symbols in the parent's namespace because the current one was there
6457 to receive symbols that are in an interface's formal argument list. */
6460 gfc_match_modproc (void)
6462 char name[GFC_MAX_SYMBOL_LEN + 1];
6465 gfc_namespace *module_ns;
6466 gfc_interface *old_interface_head, *interface;
6468 if (gfc_state_stack->state != COMP_INTERFACE
6469 || gfc_state_stack->previous == NULL
6470 || current_interface.type == INTERFACE_NAMELESS
6471 || current_interface.type == INTERFACE_ABSTRACT)
6473 gfc_error ("MODULE PROCEDURE at %C must be in a generic module "
6478 module_ns = gfc_current_ns->parent;
6479 for (; module_ns; module_ns = module_ns->parent)
6480 if (module_ns->proc_name->attr.flavor == FL_MODULE)
6483 if (module_ns == NULL)
6486 /* Store the current state of the interface. We will need it if we
6487 end up with a syntax error and need to recover. */
6488 old_interface_head = gfc_current_interface_head ();
6494 m = gfc_match_name (name);
6500 /* Check for syntax error before starting to add symbols to the
6501 current namespace. */
6502 if (gfc_match_eos () == MATCH_YES)
6504 if (!last && gfc_match_char (',') != MATCH_YES)
6507 /* Now we're sure the syntax is valid, we process this item
6509 if (gfc_get_symbol (name, module_ns, &sym))
6512 if (sym->attr.proc != PROC_MODULE
6513 && gfc_add_procedure (&sym->attr, PROC_MODULE,
6514 sym->name, NULL) == FAILURE)
6517 if (gfc_add_interface (sym) == FAILURE)
6520 sym->attr.mod_proc = 1;
6529 /* Restore the previous state of the interface. */
6530 interface = gfc_current_interface_head ();
6531 gfc_set_current_interface_head (old_interface_head);
6533 /* Free the new interfaces. */
6534 while (interface != old_interface_head)
6536 gfc_interface *i = interface->next;
6537 gfc_free (interface);
6541 /* And issue a syntax error. */
6542 gfc_syntax_error (ST_MODULE_PROC);
6547 /* Check a derived type that is being extended. */
6549 check_extended_derived_type (char *name)
6551 gfc_symbol *extended;
6553 if (gfc_find_symbol (name, gfc_current_ns, 1, &extended))
6555 gfc_error ("Ambiguous symbol in TYPE definition at %C");
6561 gfc_error ("No such symbol in TYPE definition at %C");
6565 if (extended->attr.flavor != FL_DERIVED)
6567 gfc_error ("'%s' in EXTENDS expression at %C is not a "
6568 "derived type", name);
6572 if (extended->attr.is_bind_c)
6574 gfc_error ("'%s' cannot be extended at %C because it "
6575 "is BIND(C)", extended->name);
6579 if (extended->attr.sequence)
6581 gfc_error ("'%s' cannot be extended at %C because it "
6582 "is a SEQUENCE type", extended->name);
6590 /* Match the optional attribute specifiers for a type declaration.
6591 Return MATCH_ERROR if an error is encountered in one of the handled
6592 attributes (public, private, bind(c)), MATCH_NO if what's found is
6593 not a handled attribute, and MATCH_YES otherwise. TODO: More error
6594 checking on attribute conflicts needs to be done. */
6597 gfc_get_type_attr_spec (symbol_attribute *attr, char *name)
6599 /* See if the derived type is marked as private. */
6600 if (gfc_match (" , private") == MATCH_YES)
6602 if (gfc_current_state () != COMP_MODULE)
6604 gfc_error ("Derived type at %C can only be PRIVATE in the "
6605 "specification part of a module");
6609 if (gfc_add_access (attr, ACCESS_PRIVATE, NULL, NULL) == FAILURE)
6612 else if (gfc_match (" , public") == MATCH_YES)
6614 if (gfc_current_state () != COMP_MODULE)
6616 gfc_error ("Derived type at %C can only be PUBLIC in the "
6617 "specification part of a module");
6621 if (gfc_add_access (attr, ACCESS_PUBLIC, NULL, NULL) == FAILURE)
6624 else if (gfc_match (" , bind ( c )") == MATCH_YES)
6626 /* If the type is defined to be bind(c) it then needs to make
6627 sure that all fields are interoperable. This will
6628 need to be a semantic check on the finished derived type.
6629 See 15.2.3 (lines 9-12) of F2003 draft. */
6630 if (gfc_add_is_bind_c (attr, NULL, &gfc_current_locus, 0) != SUCCESS)
6633 /* TODO: attr conflicts need to be checked, probably in symbol.c. */
6635 else if (gfc_match (" , abstract") == MATCH_YES)
6637 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ABSTRACT type at %C")
6641 if (gfc_add_abstract (attr, &gfc_current_locus) == FAILURE)
6644 else if (name && gfc_match(" , extends ( %n )", name) == MATCH_YES)
6646 if (gfc_add_extension (attr, &gfc_current_locus) == FAILURE)
6652 /* If we get here, something matched. */
6657 /* Match the beginning of a derived type declaration. If a type name
6658 was the result of a function, then it is possible to have a symbol
6659 already to be known as a derived type yet have no components. */
6662 gfc_match_derived_decl (void)
6664 char name[GFC_MAX_SYMBOL_LEN + 1];
6665 char parent[GFC_MAX_SYMBOL_LEN + 1];
6666 symbol_attribute attr;
6668 gfc_symbol *extended;
6670 match is_type_attr_spec = MATCH_NO;
6671 bool seen_attr = false;
6673 if (gfc_current_state () == COMP_DERIVED)
6678 gfc_clear_attr (&attr);
6683 is_type_attr_spec = gfc_get_type_attr_spec (&attr, parent);
6684 if (is_type_attr_spec == MATCH_ERROR)
6686 if (is_type_attr_spec == MATCH_YES)
6688 } while (is_type_attr_spec == MATCH_YES);
6690 /* Deal with derived type extensions. The extension attribute has
6691 been added to 'attr' but now the parent type must be found and
6694 extended = check_extended_derived_type (parent);
6696 if (parent[0] && !extended)
6699 if (gfc_match (" ::") != MATCH_YES && seen_attr)
6701 gfc_error ("Expected :: in TYPE definition at %C");
6705 m = gfc_match (" %n%t", name);
6709 /* Make sure the name is not the name of an intrinsic type. */
6710 if (gfc_is_intrinsic_typename (name))
6712 gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic "
6717 if (gfc_get_symbol (name, NULL, &sym))
6720 if (sym->ts.type != BT_UNKNOWN)
6722 gfc_error ("Derived type name '%s' at %C already has a basic type "
6723 "of %s", sym->name, gfc_typename (&sym->ts));
6727 /* The symbol may already have the derived attribute without the
6728 components. The ways this can happen is via a function
6729 definition, an INTRINSIC statement or a subtype in another
6730 derived type that is a pointer. The first part of the AND clause
6731 is true if the symbol is not the return value of a function. */
6732 if (sym->attr.flavor != FL_DERIVED
6733 && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE)
6736 if (sym->components != NULL || sym->attr.zero_comp)
6738 gfc_error ("Derived type definition of '%s' at %C has already been "
6739 "defined", sym->name);
6743 if (attr.access != ACCESS_UNKNOWN
6744 && gfc_add_access (&sym->attr, attr.access, sym->name, NULL) == FAILURE)
6747 /* See if the derived type was labeled as bind(c). */
6748 if (attr.is_bind_c != 0)
6749 sym->attr.is_bind_c = attr.is_bind_c;
6751 /* Construct the f2k_derived namespace if it is not yet there. */
6752 if (!sym->f2k_derived)
6753 sym->f2k_derived = gfc_get_namespace (NULL, 0);
6755 if (extended && !sym->components)
6760 /* Add the extended derived type as the first component. */
6761 gfc_add_component (sym, parent, &p);
6762 sym->attr.extension = attr.extension;
6764 gfc_set_sym_referenced (extended);
6766 p->ts.type = BT_DERIVED;
6767 p->ts.u.derived = extended;
6768 p->initializer = gfc_default_initializer (&p->ts);
6770 /* Provide the links between the extended type and its extension. */
6771 if (!extended->f2k_derived)
6772 extended->f2k_derived = gfc_get_namespace (NULL, 0);
6773 st = gfc_new_symtree (&extended->f2k_derived->sym_root, sym->name);
6777 /* Take over the ABSTRACT attribute. */
6778 sym->attr.abstract = attr.abstract;
6780 gfc_new_block = sym;
6786 /* Cray Pointees can be declared as:
6787 pointer (ipt, a (n,m,...,*))
6788 By default, this is treated as an AS_ASSUMED_SIZE array. We'll
6789 cheat and set a constant bound of 1 for the last dimension, if this
6790 is the case. Since there is no bounds-checking for Cray Pointees,
6791 this will be okay. */
6794 gfc_mod_pointee_as (gfc_array_spec *as)
6796 as->cray_pointee = true; /* This will be useful to know later. */
6797 if (as->type == AS_ASSUMED_SIZE)
6799 as->type = AS_EXPLICIT;
6800 as->upper[as->rank - 1] = gfc_int_expr (1);
6801 as->cp_was_assumed = true;
6803 else if (as->type == AS_ASSUMED_SHAPE)
6805 gfc_error ("Cray Pointee at %C cannot be assumed shape array");
6812 /* Match the enum definition statement, here we are trying to match
6813 the first line of enum definition statement.
6814 Returns MATCH_YES if match is found. */
6817 gfc_match_enum (void)
6821 m = gfc_match_eos ();
6825 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENUM and ENUMERATOR at %C")
6833 /* Returns an initializer whose value is one higher than the value of the
6834 LAST_INITIALIZER argument. If the argument is NULL, the
6835 initializers value will be set to zero. The initializer's kind
6836 will be set to gfc_c_int_kind.
6838 If -fshort-enums is given, the appropriate kind will be selected
6839 later after all enumerators have been parsed. A warning is issued
6840 here if an initializer exceeds gfc_c_int_kind. */
6843 enum_initializer (gfc_expr *last_initializer, locus where)
6847 result = gfc_get_expr ();
6848 result->expr_type = EXPR_CONSTANT;
6849 result->ts.type = BT_INTEGER;
6850 result->ts.kind = gfc_c_int_kind;
6851 result->where = where;
6853 mpz_init (result->value.integer);
6855 if (last_initializer != NULL)
6857 mpz_add_ui (result->value.integer, last_initializer->value.integer, 1);
6858 result->where = last_initializer->where;
6860 if (gfc_check_integer_range (result->value.integer,
6861 gfc_c_int_kind) != ARITH_OK)
6863 gfc_error ("Enumerator exceeds the C integer type at %C");
6869 /* Control comes here, if it's the very first enumerator and no
6870 initializer has been given. It will be initialized to zero. */
6871 mpz_set_si (result->value.integer, 0);
6878 /* Match a variable name with an optional initializer. When this
6879 subroutine is called, a variable is expected to be parsed next.
6880 Depending on what is happening at the moment, updates either the
6881 symbol table or the current interface. */
6884 enumerator_decl (void)
6886 char name[GFC_MAX_SYMBOL_LEN + 1];
6887 gfc_expr *initializer;
6888 gfc_array_spec *as = NULL;
6896 old_locus = gfc_current_locus;
6898 /* When we get here, we've just matched a list of attributes and
6899 maybe a type and a double colon. The next thing we expect to see
6900 is the name of the symbol. */
6901 m = gfc_match_name (name);
6905 var_locus = gfc_current_locus;
6907 /* OK, we've successfully matched the declaration. Now put the
6908 symbol in the current namespace. If we fail to create the symbol,
6910 if (build_sym (name, NULL, &as, &var_locus) == FAILURE)
6916 /* The double colon must be present in order to have initializers.
6917 Otherwise the statement is ambiguous with an assignment statement. */
6920 if (gfc_match_char ('=') == MATCH_YES)
6922 m = gfc_match_init_expr (&initializer);
6925 gfc_error ("Expected an initialization expression at %C");
6934 /* If we do not have an initializer, the initialization value of the
6935 previous enumerator (stored in last_initializer) is incremented
6936 by 1 and is used to initialize the current enumerator. */
6937 if (initializer == NULL)
6938 initializer = enum_initializer (last_initializer, old_locus);
6940 if (initializer == NULL || initializer->ts.type != BT_INTEGER)
6942 gfc_error("ENUMERATOR %L not initialized with integer expression",
6945 gfc_free_enum_history ();
6949 /* Store this current initializer, for the next enumerator variable
6950 to be parsed. add_init_expr_to_sym() zeros initializer, so we
6951 use last_initializer below. */
6952 last_initializer = initializer;
6953 t = add_init_expr_to_sym (name, &initializer, &var_locus);
6955 /* Maintain enumerator history. */
6956 gfc_find_symbol (name, NULL, 0, &sym);
6957 create_enum_history (sym, last_initializer);
6959 return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR;
6962 /* Free stuff up and return. */
6963 gfc_free_expr (initializer);
6969 /* Match the enumerator definition statement. */
6972 gfc_match_enumerator_def (void)
6977 gfc_clear_ts (¤t_ts);
6979 m = gfc_match (" enumerator");
6983 m = gfc_match (" :: ");
6984 if (m == MATCH_ERROR)
6987 colon_seen = (m == MATCH_YES);
6989 if (gfc_current_state () != COMP_ENUM)
6991 gfc_error ("ENUM definition statement expected before %C");
6992 gfc_free_enum_history ();
6996 (¤t_ts)->type = BT_INTEGER;
6997 (¤t_ts)->kind = gfc_c_int_kind;
6999 gfc_clear_attr (¤t_attr);
7000 t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, NULL);
7009 m = enumerator_decl ();
7010 if (m == MATCH_ERROR)
7015 if (gfc_match_eos () == MATCH_YES)
7017 if (gfc_match_char (',') != MATCH_YES)
7021 if (gfc_current_state () == COMP_ENUM)
7023 gfc_free_enum_history ();
7024 gfc_error ("Syntax error in ENUMERATOR definition at %C");
7029 gfc_free_array_spec (current_as);
7036 /* Match binding attributes. */
7039 match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc)
7041 bool found_passing = false;
7042 bool seen_ptr = false;
7043 match m = MATCH_YES;
7045 /* Intialize to defaults. Do so even before the MATCH_NO check so that in
7046 this case the defaults are in there. */
7047 ba->access = ACCESS_UNKNOWN;
7048 ba->pass_arg = NULL;
7049 ba->pass_arg_num = 0;
7051 ba->non_overridable = 0;
7055 /* If we find a comma, we believe there are binding attributes. */
7056 m = gfc_match_char (',');
7062 /* Access specifier. */
7064 m = gfc_match (" public");
7065 if (m == MATCH_ERROR)
7069 if (ba->access != ACCESS_UNKNOWN)
7071 gfc_error ("Duplicate access-specifier at %C");
7075 ba->access = ACCESS_PUBLIC;
7079 m = gfc_match (" private");
7080 if (m == MATCH_ERROR)
7084 if (ba->access != ACCESS_UNKNOWN)
7086 gfc_error ("Duplicate access-specifier at %C");
7090 ba->access = ACCESS_PRIVATE;
7094 /* If inside GENERIC, the following is not allowed. */
7099 m = gfc_match (" nopass");
7100 if (m == MATCH_ERROR)
7106 gfc_error ("Binding attributes already specify passing,"
7107 " illegal NOPASS at %C");
7111 found_passing = true;
7116 /* PASS possibly including argument. */
7117 m = gfc_match (" pass");
7118 if (m == MATCH_ERROR)
7122 char arg[GFC_MAX_SYMBOL_LEN + 1];
7126 gfc_error ("Binding attributes already specify passing,"
7127 " illegal PASS at %C");
7131 m = gfc_match (" ( %n )", arg);
7132 if (m == MATCH_ERROR)
7135 ba->pass_arg = gfc_get_string (arg);
7136 gcc_assert ((m == MATCH_YES) == (ba->pass_arg != NULL));
7138 found_passing = true;
7146 m = gfc_match (" pointer");
7147 if (m == MATCH_ERROR)
7153 gfc_error ("Duplicate POINTER attribute at %C");
7163 /* NON_OVERRIDABLE flag. */
7164 m = gfc_match (" non_overridable");
7165 if (m == MATCH_ERROR)
7169 if (ba->non_overridable)
7171 gfc_error ("Duplicate NON_OVERRIDABLE at %C");
7175 ba->non_overridable = 1;
7179 /* DEFERRED flag. */
7180 m = gfc_match (" deferred");
7181 if (m == MATCH_ERROR)
7187 gfc_error ("Duplicate DEFERRED at %C");
7198 /* Nothing matching found. */
7200 gfc_error ("Expected access-specifier at %C");
7202 gfc_error ("Expected binding attribute at %C");
7205 while (gfc_match_char (',') == MATCH_YES);
7207 /* NON_OVERRIDABLE and DEFERRED exclude themselves. */
7208 if (ba->non_overridable && ba->deferred)
7210 gfc_error ("NON_OVERRIDABLE and DEFERRED can't both appear at %C");
7217 if (ba->access == ACCESS_UNKNOWN)
7218 ba->access = gfc_typebound_default_access;
7220 if (ppc && !seen_ptr)
7222 gfc_error ("POINTER attribute is required for procedure pointer component"
7234 /* Match a PROCEDURE specific binding inside a derived type. */
7237 match_procedure_in_type (void)
7239 char name[GFC_MAX_SYMBOL_LEN + 1];
7240 char target_buf[GFC_MAX_SYMBOL_LEN + 1];
7241 char* target = NULL;
7242 gfc_typebound_proc* tb;
7250 /* Check current state. */
7251 gcc_assert (gfc_state_stack->state == COMP_DERIVED_CONTAINS);
7252 block = gfc_state_stack->previous->sym;
7255 /* Try to match PROCEDURE(interface). */
7256 if (gfc_match (" (") == MATCH_YES)
7258 m = gfc_match_name (target_buf);
7259 if (m == MATCH_ERROR)
7263 gfc_error ("Interface-name expected after '(' at %C");
7267 if (gfc_match (" )") != MATCH_YES)
7269 gfc_error ("')' expected at %C");
7273 target = target_buf;
7276 /* Construct the data structure. */
7277 tb = gfc_get_typebound_proc ();
7278 tb->where = gfc_current_locus;
7281 /* Match binding attributes. */
7282 m = match_binding_attributes (tb, false, false);
7283 if (m == MATCH_ERROR)
7285 seen_attrs = (m == MATCH_YES);
7287 /* Check that attribute DEFERRED is given iff an interface is specified, which
7288 means target != NULL. */
7289 if (tb->deferred && !target)
7291 gfc_error ("Interface must be specified for DEFERRED binding at %C");
7294 if (target && !tb->deferred)
7296 gfc_error ("PROCEDURE(interface) at %C should be declared DEFERRED");
7300 /* Match the colons. */
7301 m = gfc_match (" ::");
7302 if (m == MATCH_ERROR)
7304 seen_colons = (m == MATCH_YES);
7305 if (seen_attrs && !seen_colons)
7307 gfc_error ("Expected '::' after binding-attributes at %C");
7311 /* Match the binding name. */
7312 m = gfc_match_name (name);
7313 if (m == MATCH_ERROR)
7317 gfc_error ("Expected binding name at %C");
7321 /* Try to match the '=> target', if it's there. */
7322 m = gfc_match (" =>");
7323 if (m == MATCH_ERROR)
7329 gfc_error ("'=> target' is invalid for DEFERRED binding at %C");
7335 gfc_error ("'::' needed in PROCEDURE binding with explicit target"
7340 m = gfc_match_name (target_buf);
7341 if (m == MATCH_ERROR)
7345 gfc_error ("Expected binding target after '=>' at %C");
7348 target = target_buf;
7351 /* Now we should have the end. */
7352 m = gfc_match_eos ();
7353 if (m == MATCH_ERROR)
7357 gfc_error ("Junk after PROCEDURE declaration at %C");
7361 /* If no target was found, it has the same name as the binding. */
7365 /* Get the namespace to insert the symbols into. */
7366 ns = block->f2k_derived;
7369 /* If the binding is DEFERRED, check that the containing type is ABSTRACT. */
7370 if (tb->deferred && !block->attr.abstract)
7372 gfc_error ("Type '%s' containing DEFERRED binding at %C is not ABSTRACT",
7377 /* See if we already have a binding with this name in the symtree which would
7378 be an error. If a GENERIC already targetted this binding, it may be
7379 already there but then typebound is still NULL. */
7380 stree = gfc_find_symtree (ns->tb_sym_root, name);
7381 if (stree && stree->n.tb)
7383 gfc_error ("There's already a procedure with binding name '%s' for the"
7384 " derived type '%s' at %C", name, block->name);
7388 /* Insert it and set attributes. */
7392 stree = gfc_new_symtree (&ns->tb_sym_root, name);
7397 if (gfc_get_sym_tree (target, gfc_current_ns, &tb->u.specific, false))
7399 gfc_set_sym_referenced (tb->u.specific->n.sym);
7405 /* Match a GENERIC procedure binding inside a derived type. */
7408 gfc_match_generic (void)
7410 char name[GFC_MAX_SYMBOL_LEN + 1];
7411 char bind_name[GFC_MAX_SYMBOL_LEN + 16]; /* Allow space for OPERATOR(...). */
7413 gfc_typebound_proc tbattr; /* Used for match_binding_attributes. */
7414 gfc_typebound_proc* tb;
7416 interface_type op_type;
7417 gfc_intrinsic_op op;
7420 /* Check current state. */
7421 if (gfc_current_state () == COMP_DERIVED)
7423 gfc_error ("GENERIC at %C must be inside a derived-type CONTAINS");
7426 if (gfc_current_state () != COMP_DERIVED_CONTAINS)
7428 block = gfc_state_stack->previous->sym;
7429 ns = block->f2k_derived;
7430 gcc_assert (block && ns);
7432 /* See if we get an access-specifier. */
7433 m = match_binding_attributes (&tbattr, true, false);
7434 if (m == MATCH_ERROR)
7437 /* Now the colons, those are required. */
7438 if (gfc_match (" ::") != MATCH_YES)
7440 gfc_error ("Expected '::' at %C");
7444 /* Match the binding name; depending on type (operator / generic) format
7445 it for future error messages into bind_name. */
7447 m = gfc_match_generic_spec (&op_type, name, &op);
7448 if (m == MATCH_ERROR)
7452 gfc_error ("Expected generic name or operator descriptor at %C");
7458 case INTERFACE_GENERIC:
7459 snprintf (bind_name, sizeof (bind_name), "%s", name);
7462 case INTERFACE_USER_OP:
7463 snprintf (bind_name, sizeof (bind_name), "OPERATOR(.%s.)", name);
7466 case INTERFACE_INTRINSIC_OP:
7467 snprintf (bind_name, sizeof (bind_name), "OPERATOR(%s)",
7468 gfc_op2string (op));
7475 /* Match the required =>. */
7476 if (gfc_match (" =>") != MATCH_YES)
7478 gfc_error ("Expected '=>' at %C");
7482 /* Try to find existing GENERIC binding with this name / for this operator;
7483 if there is something, check that it is another GENERIC and then extend
7484 it rather than building a new node. Otherwise, create it and put it
7485 at the right position. */
7489 case INTERFACE_USER_OP:
7490 case INTERFACE_GENERIC:
7492 const bool is_op = (op_type == INTERFACE_USER_OP);
7495 st = gfc_find_symtree (is_op ? ns->tb_uop_root : ns->tb_sym_root, name);
7507 case INTERFACE_INTRINSIC_OP:
7517 if (!tb->is_generic)
7519 gcc_assert (op_type == INTERFACE_GENERIC);
7520 gfc_error ("There's already a non-generic procedure with binding name"
7521 " '%s' for the derived type '%s' at %C",
7522 bind_name, block->name);
7526 if (tb->access != tbattr.access)
7528 gfc_error ("Binding at %C must have the same access as already"
7529 " defined binding '%s'", bind_name);
7535 tb = gfc_get_typebound_proc ();
7536 tb->where = gfc_current_locus;
7537 tb->access = tbattr.access;
7539 tb->u.generic = NULL;
7543 case INTERFACE_GENERIC:
7544 case INTERFACE_USER_OP:
7546 const bool is_op = (op_type == INTERFACE_USER_OP);
7549 st = gfc_new_symtree (is_op ? &ns->tb_uop_root : &ns->tb_sym_root,
7557 case INTERFACE_INTRINSIC_OP:
7566 /* Now, match all following names as specific targets. */
7569 gfc_symtree* target_st;
7570 gfc_tbp_generic* target;
7572 m = gfc_match_name (name);
7573 if (m == MATCH_ERROR)
7577 gfc_error ("Expected specific binding name at %C");
7581 target_st = gfc_get_tbp_symtree (&ns->tb_sym_root, name);
7583 /* See if this is a duplicate specification. */
7584 for (target = tb->u.generic; target; target = target->next)
7585 if (target_st == target->specific_st)
7587 gfc_error ("'%s' already defined as specific binding for the"
7588 " generic '%s' at %C", name, bind_name);
7592 target = gfc_get_tbp_generic ();
7593 target->specific_st = target_st;
7594 target->specific = NULL;
7595 target->next = tb->u.generic;
7596 tb->u.generic = target;
7598 while (gfc_match (" ,") == MATCH_YES);
7600 /* Here should be the end. */
7601 if (gfc_match_eos () != MATCH_YES)
7603 gfc_error ("Junk after GENERIC binding at %C");
7614 /* Match a FINAL declaration inside a derived type. */
7617 gfc_match_final_decl (void)
7619 char name[GFC_MAX_SYMBOL_LEN + 1];
7622 gfc_namespace* module_ns;
7626 if (gfc_state_stack->state != COMP_DERIVED_CONTAINS)
7628 gfc_error ("FINAL declaration at %C must be inside a derived type "
7629 "CONTAINS section");
7633 block = gfc_state_stack->previous->sym;
7636 if (!gfc_state_stack->previous || !gfc_state_stack->previous->previous
7637 || gfc_state_stack->previous->previous->state != COMP_MODULE)
7639 gfc_error ("Derived type declaration with FINAL at %C must be in the"
7640 " specification part of a MODULE");
7644 module_ns = gfc_current_ns;
7645 gcc_assert (module_ns);
7646 gcc_assert (module_ns->proc_name->attr.flavor == FL_MODULE);
7648 /* Match optional ::, don't care about MATCH_YES or MATCH_NO. */
7649 if (gfc_match (" ::") == MATCH_ERROR)
7652 /* Match the sequence of procedure names. */
7659 if (first && gfc_match_eos () == MATCH_YES)
7661 gfc_error ("Empty FINAL at %C");
7665 m = gfc_match_name (name);
7668 gfc_error ("Expected module procedure name at %C");
7671 else if (m != MATCH_YES)
7674 if (gfc_match_eos () == MATCH_YES)
7676 if (!last && gfc_match_char (',') != MATCH_YES)
7678 gfc_error ("Expected ',' at %C");
7682 if (gfc_get_symbol (name, module_ns, &sym))
7684 gfc_error ("Unknown procedure name \"%s\" at %C", name);
7688 /* Mark the symbol as module procedure. */
7689 if (sym->attr.proc != PROC_MODULE
7690 && gfc_add_procedure (&sym->attr, PROC_MODULE,
7691 sym->name, NULL) == FAILURE)
7694 /* Check if we already have this symbol in the list, this is an error. */
7695 for (f = block->f2k_derived->finalizers; f; f = f->next)
7696 if (f->proc_sym == sym)
7698 gfc_error ("'%s' at %C is already defined as FINAL procedure!",
7703 /* Add this symbol to the list of finalizers. */
7704 gcc_assert (block->f2k_derived);
7706 f = XCNEW (gfc_finalizer);
7708 f->proc_tree = NULL;
7709 f->where = gfc_current_locus;
7710 f->next = block->f2k_derived->finalizers;
7711 block->f2k_derived->finalizers = f;
7721 const ext_attr_t ext_attr_list[] = {
7722 { "dllimport", EXT_ATTR_DLLIMPORT, "dllimport" },
7723 { "dllexport", EXT_ATTR_DLLEXPORT, "dllexport" },
7724 { "cdecl", EXT_ATTR_CDECL, "cdecl" },
7725 { "stdcall", EXT_ATTR_STDCALL, "stdcall" },
7726 { "fastcall", EXT_ATTR_FASTCALL, "fastcall" },
7727 { NULL, EXT_ATTR_LAST, NULL }
7730 /* Match a !GCC$ ATTRIBUTES statement of the form:
7731 !GCC$ ATTRIBUTES attribute-list :: var-name [, var-name] ...
7732 When we come here, we have already matched the !GCC$ ATTRIBUTES string.
7734 TODO: We should support all GCC attributes using the same syntax for
7735 the attribute list, i.e. the list in C
7736 __attributes(( attribute-list ))
7738 !GCC$ ATTRIBUTES attribute-list ::
7739 Cf. c-parser.c's c_parser_attributes; the data can then directly be
7742 As there is absolutely no risk of confusion, we should never return
7745 gfc_match_gcc_attributes (void)
7747 symbol_attribute attr;
7748 char name[GFC_MAX_SYMBOL_LEN + 1];
7753 gfc_clear_attr (&attr);
7758 if (gfc_match_name (name) != MATCH_YES)
7761 for (id = 0; id < EXT_ATTR_LAST; id++)
7762 if (strcmp (name, ext_attr_list[id].name) == 0)
7765 if (id == EXT_ATTR_LAST)
7767 gfc_error ("Unknown attribute in !GCC$ ATTRIBUTES statement at %C");
7771 if (gfc_add_ext_attribute (&attr, (ext_attr_id_t) id, &gfc_current_locus)
7775 gfc_gobble_whitespace ();
7776 ch = gfc_next_ascii_char ();
7779 /* This is the successful exit condition for the loop. */
7780 if (gfc_next_ascii_char () == ':')
7790 if (gfc_match_eos () == MATCH_YES)
7795 m = gfc_match_name (name);
7799 if (find_special (name, &sym, true))
7802 sym->attr.ext_attr |= attr.ext_attr;
7804 if (gfc_match_eos () == MATCH_YES)
7807 if (gfc_match_char (',') != MATCH_YES)
7814 gfc_error ("Syntax error in !GCC$ ATTRIBUTES statement at %C");