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));
1029 /* Function called by variable_decl() that adds a name to the symbol table. */
1032 build_sym (const char *name, gfc_charlen *cl,
1033 gfc_array_spec **as, locus *var_locus)
1035 symbol_attribute attr;
1038 if (gfc_get_symbol (name, NULL, &sym))
1041 /* Start updating the symbol table. Add basic type attribute if present. */
1042 if (current_ts.type != BT_UNKNOWN
1043 && (sym->attr.implicit_type == 0
1044 || !gfc_compare_types (&sym->ts, ¤t_ts))
1045 && gfc_add_type (sym, ¤t_ts, var_locus) == FAILURE)
1048 if (sym->ts.type == BT_CHARACTER)
1051 /* Add dimension attribute if present. */
1052 if (gfc_set_array_spec (sym, *as, var_locus) == FAILURE)
1056 /* Add attribute to symbol. The copy is so that we can reset the
1057 dimension attribute. */
1058 attr = current_attr;
1061 if (gfc_copy_attr (&sym->attr, &attr, var_locus) == FAILURE)
1064 /* Finish any work that may need to be done for the binding label,
1065 if it's a bind(c). The bind(c) attr is found before the symbol
1066 is made, and before the symbol name (for data decls), so the
1067 current_ts is holding the binding label, or nothing if the
1068 name= attr wasn't given. Therefore, test here if we're dealing
1069 with a bind(c) and make sure the binding label is set correctly. */
1070 if (sym->attr.is_bind_c == 1)
1072 if (sym->binding_label[0] == '\0')
1074 /* Set the binding label and verify that if a NAME= was specified
1075 then only one identifier was in the entity-decl-list. */
1076 if (set_binding_label (sym->binding_label, sym->name,
1077 num_idents_on_line) == FAILURE)
1082 /* See if we know we're in a common block, and if it's a bind(c)
1083 common then we need to make sure we're an interoperable type. */
1084 if (sym->attr.in_common == 1)
1086 /* Test the common block object. */
1087 if (sym->common_block != NULL && sym->common_block->is_bind_c == 1
1088 && sym->ts.is_c_interop != 1)
1090 gfc_error_now ("Variable '%s' in common block '%s' at %C "
1091 "must be declared with a C interoperable "
1092 "kind since common block '%s' is BIND(C)",
1093 sym->name, sym->common_block->name,
1094 sym->common_block->name);
1099 sym->attr.implied_index = 0;
1101 if (sym->ts.type == BT_CLASS)
1103 sym->attr.class_ok = (sym->attr.dummy
1104 || sym->attr.pointer
1105 || sym->attr.allocatable) ? 1 : 0;
1106 gfc_build_class_symbol (&sym->ts, &sym->attr, &sym->as);
1113 /* Set character constant to the given length. The constant will be padded or
1114 truncated. If we're inside an array constructor without a typespec, we
1115 additionally check that all elements have the same length; check_len -1
1116 means no checking. */
1119 gfc_set_constant_character_len (int len, gfc_expr *expr, int check_len)
1124 gcc_assert (expr->expr_type == EXPR_CONSTANT);
1125 gcc_assert (expr->ts.type == BT_CHARACTER);
1127 slen = expr->value.character.length;
1130 s = gfc_get_wide_string (len + 1);
1131 memcpy (s, expr->value.character.string,
1132 MIN (len, slen) * sizeof (gfc_char_t));
1134 gfc_wide_memset (&s[slen], ' ', len - slen);
1136 if (gfc_option.warn_character_truncation && slen > len)
1137 gfc_warning_now ("CHARACTER expression at %L is being truncated "
1138 "(%d/%d)", &expr->where, slen, len);
1140 /* Apply the standard by 'hand' otherwise it gets cleared for
1142 if (check_len != -1 && slen != check_len
1143 && !(gfc_option.allow_std & GFC_STD_GNU))
1144 gfc_error_now ("The CHARACTER elements of the array constructor "
1145 "at %L must have the same length (%d/%d)",
1146 &expr->where, slen, check_len);
1149 gfc_free (expr->value.character.string);
1150 expr->value.character.string = s;
1151 expr->value.character.length = len;
1156 /* Function to create and update the enumerator history
1157 using the information passed as arguments.
1158 Pointer "max_enum" is also updated, to point to
1159 enum history node containing largest initializer.
1161 SYM points to the symbol node of enumerator.
1162 INIT points to its enumerator value. */
1165 create_enum_history (gfc_symbol *sym, gfc_expr *init)
1167 enumerator_history *new_enum_history;
1168 gcc_assert (sym != NULL && init != NULL);
1170 new_enum_history = XCNEW (enumerator_history);
1172 new_enum_history->sym = sym;
1173 new_enum_history->initializer = init;
1174 new_enum_history->next = NULL;
1176 if (enum_history == NULL)
1178 enum_history = new_enum_history;
1179 max_enum = enum_history;
1183 new_enum_history->next = enum_history;
1184 enum_history = new_enum_history;
1186 if (mpz_cmp (max_enum->initializer->value.integer,
1187 new_enum_history->initializer->value.integer) < 0)
1188 max_enum = new_enum_history;
1193 /* Function to free enum kind history. */
1196 gfc_free_enum_history (void)
1198 enumerator_history *current = enum_history;
1199 enumerator_history *next;
1201 while (current != NULL)
1203 next = current->next;
1208 enum_history = NULL;
1212 /* Function called by variable_decl() that adds an initialization
1213 expression to a symbol. */
1216 add_init_expr_to_sym (const char *name, gfc_expr **initp, locus *var_locus)
1218 symbol_attribute attr;
1223 if (find_special (name, &sym, false))
1228 /* If this symbol is confirming an implicit parameter type,
1229 then an initialization expression is not allowed. */
1230 if (attr.flavor == FL_PARAMETER
1231 && sym->value != NULL
1234 gfc_error ("Initializer not allowed for PARAMETER '%s' at %C",
1241 /* An initializer is required for PARAMETER declarations. */
1242 if (attr.flavor == FL_PARAMETER)
1244 gfc_error ("PARAMETER at %L is missing an initializer", var_locus);
1250 /* If a variable appears in a DATA block, it cannot have an
1254 gfc_error ("Variable '%s' at %C with an initializer already "
1255 "appears in a DATA statement", sym->name);
1259 /* Check if the assignment can happen. This has to be put off
1260 until later for a derived type variable. */
1261 if (sym->ts.type != BT_DERIVED && init->ts.type != BT_DERIVED
1262 && sym->ts.type != BT_CLASS && init->ts.type != BT_CLASS
1263 && gfc_check_assign_symbol (sym, init) == FAILURE)
1266 if (sym->ts.type == BT_CHARACTER && sym->ts.u.cl
1267 && init->ts.type == BT_CHARACTER)
1269 /* Update symbol character length according initializer. */
1270 if (gfc_check_assign_symbol (sym, init) == FAILURE)
1273 if (sym->ts.u.cl->length == NULL)
1276 /* If there are multiple CHARACTER variables declared on the
1277 same line, we don't want them to share the same length. */
1278 sym->ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL);
1280 if (sym->attr.flavor == FL_PARAMETER)
1282 if (init->expr_type == EXPR_CONSTANT)
1284 clen = init->value.character.length;
1285 sym->ts.u.cl->length = gfc_int_expr (clen);
1287 else if (init->expr_type == EXPR_ARRAY)
1289 gfc_expr *p = init->value.constructor->expr;
1290 clen = p->value.character.length;
1291 sym->ts.u.cl->length = gfc_int_expr (clen);
1293 else if (init->ts.u.cl && init->ts.u.cl->length)
1294 sym->ts.u.cl->length =
1295 gfc_copy_expr (sym->value->ts.u.cl->length);
1298 /* Update initializer character length according symbol. */
1299 else if (sym->ts.u.cl->length->expr_type == EXPR_CONSTANT)
1301 int len = mpz_get_si (sym->ts.u.cl->length->value.integer);
1302 gfc_constructor * p;
1304 if (init->expr_type == EXPR_CONSTANT)
1305 gfc_set_constant_character_len (len, init, -1);
1306 else if (init->expr_type == EXPR_ARRAY)
1308 /* Build a new charlen to prevent simplification from
1309 deleting the length before it is resolved. */
1310 init->ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL);
1311 init->ts.u.cl->length = gfc_copy_expr (sym->ts.u.cl->length);
1313 for (p = init->value.constructor; p; p = p->next)
1314 gfc_set_constant_character_len (len, p->expr, -1);
1319 /* Need to check if the expression we initialized this
1320 to was one of the iso_c_binding named constants. If so,
1321 and we're a parameter (constant), let it be iso_c.
1323 integer(c_int), parameter :: my_int = c_int
1324 integer(my_int) :: my_int_2
1325 If we mark my_int as iso_c (since we can see it's value
1326 is equal to one of the named constants), then my_int_2
1327 will be considered C interoperable. */
1328 if (sym->ts.type != BT_CHARACTER && sym->ts.type != BT_DERIVED)
1330 sym->ts.is_iso_c |= init->ts.is_iso_c;
1331 sym->ts.is_c_interop |= init->ts.is_c_interop;
1332 /* attr bits needed for module files. */
1333 sym->attr.is_iso_c |= init->ts.is_iso_c;
1334 sym->attr.is_c_interop |= init->ts.is_c_interop;
1335 if (init->ts.is_iso_c)
1336 sym->ts.f90_type = init->ts.f90_type;
1339 /* Add initializer. Make sure we keep the ranks sane. */
1340 if (sym->attr.dimension && init->rank == 0)
1346 if (sym->attr.flavor == FL_PARAMETER
1347 && init->expr_type == EXPR_CONSTANT
1348 && spec_size (sym->as, &size) == SUCCESS
1349 && mpz_cmp_si (size, 0) > 0)
1351 array = gfc_start_constructor (init->ts.type, init->ts.kind,
1354 array->value.constructor = c = NULL;
1355 for (n = 0; n < (int)mpz_get_si (size); n++)
1357 if (array->value.constructor == NULL)
1359 array->value.constructor = c = gfc_get_constructor ();
1364 c->next = gfc_get_constructor ();
1366 c->expr = gfc_copy_expr (init);
1370 array->shape = gfc_get_shape (sym->as->rank);
1371 for (n = 0; n < sym->as->rank; n++)
1372 spec_dimen_size (sym->as, n, &array->shape[n]);
1377 init->rank = sym->as->rank;
1381 if (sym->attr.save == SAVE_NONE)
1382 sym->attr.save = SAVE_IMPLICIT;
1390 /* Function called by variable_decl() that adds a name to a structure
1394 build_struct (const char *name, gfc_charlen *cl, gfc_expr **init,
1395 gfc_array_spec **as)
1398 gfc_try t = SUCCESS;
1400 /* F03:C438/C439. If the current symbol is of the same derived type that we're
1401 constructing, it must have the pointer attribute. */
1402 if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS)
1403 && current_ts.u.derived == gfc_current_block ()
1404 && current_attr.pointer == 0)
1406 gfc_error ("Component at %C must have the POINTER attribute");
1410 if (gfc_current_block ()->attr.pointer && (*as)->rank != 0)
1412 if ((*as)->type != AS_DEFERRED && (*as)->type != AS_EXPLICIT)
1414 gfc_error ("Array component of structure at %C must have explicit "
1415 "or deferred shape");
1420 if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE)
1424 if (c->ts.type == BT_CHARACTER)
1426 c->attr = current_attr;
1428 c->initializer = *init;
1433 c->attr.dimension = 1;
1436 /* Should this ever get more complicated, combine with similar section
1437 in add_init_expr_to_sym into a separate function. */
1438 if (c->ts.type == BT_CHARACTER && !c->attr.pointer && c->initializer && c->ts.u.cl
1439 && c->ts.u.cl->length && c->ts.u.cl->length->expr_type == EXPR_CONSTANT)
1443 gcc_assert (c->ts.u.cl && c->ts.u.cl->length);
1444 gcc_assert (c->ts.u.cl->length->expr_type == EXPR_CONSTANT);
1445 gcc_assert (c->ts.u.cl->length->ts.type == BT_INTEGER);
1447 len = mpz_get_si (c->ts.u.cl->length->value.integer);
1449 if (c->initializer->expr_type == EXPR_CONSTANT)
1450 gfc_set_constant_character_len (len, c->initializer, -1);
1451 else if (mpz_cmp (c->ts.u.cl->length->value.integer,
1452 c->initializer->ts.u.cl->length->value.integer))
1455 gfc_constructor *ctor = c->initializer->value.constructor;
1457 has_ts = (c->initializer->ts.u.cl
1458 && c->initializer->ts.u.cl->length_from_typespec);
1464 /* Remember the length of the first element for checking
1465 that all elements *in the constructor* have the same
1466 length. This need not be the length of the LHS! */
1467 gcc_assert (ctor->expr->expr_type == EXPR_CONSTANT);
1468 gcc_assert (ctor->expr->ts.type == BT_CHARACTER);
1469 first_len = ctor->expr->value.character.length;
1471 for (; ctor; ctor = ctor->next)
1473 if (ctor->expr->expr_type == EXPR_CONSTANT)
1474 gfc_set_constant_character_len (len, ctor->expr,
1475 has_ts ? -1 : first_len);
1481 /* Check array components. */
1482 if (!c->attr.dimension)
1485 if (c->attr.pointer)
1487 if (c->as->type != AS_DEFERRED)
1489 gfc_error ("Pointer array component of structure at %C must have a "
1494 else if (c->attr.allocatable)
1496 if (c->as->type != AS_DEFERRED)
1498 gfc_error ("Allocatable component of structure at %C must have a "
1505 if (c->as->type != AS_EXPLICIT)
1507 gfc_error ("Array component of structure at %C must have an "
1514 if (c->ts.type == BT_CLASS)
1515 gfc_build_class_symbol (&c->ts, &c->attr, &c->as);
1521 /* Match a 'NULL()', and possibly take care of some side effects. */
1524 gfc_match_null (gfc_expr **result)
1530 m = gfc_match (" null ( )");
1534 /* The NULL symbol now has to be/become an intrinsic function. */
1535 if (gfc_get_symbol ("null", NULL, &sym))
1537 gfc_error ("NULL() initialization at %C is ambiguous");
1541 gfc_intrinsic_symbol (sym);
1543 if (sym->attr.proc != PROC_INTRINSIC
1544 && (gfc_add_procedure (&sym->attr, PROC_INTRINSIC,
1545 sym->name, NULL) == FAILURE
1546 || gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE))
1549 e = gfc_get_expr ();
1550 e->where = gfc_current_locus;
1551 e->expr_type = EXPR_NULL;
1552 e->ts.type = BT_UNKNOWN;
1560 /* Match a variable name with an optional initializer. When this
1561 subroutine is called, a variable is expected to be parsed next.
1562 Depending on what is happening at the moment, updates either the
1563 symbol table or the current interface. */
1566 variable_decl (int elem)
1568 char name[GFC_MAX_SYMBOL_LEN + 1];
1569 gfc_expr *initializer, *char_len;
1571 gfc_array_spec *cp_as; /* Extra copy for Cray Pointees. */
1582 /* When we get here, we've just matched a list of attributes and
1583 maybe a type and a double colon. The next thing we expect to see
1584 is the name of the symbol. */
1585 m = gfc_match_name (name);
1589 var_locus = gfc_current_locus;
1591 /* Now we could see the optional array spec. or character length. */
1592 m = gfc_match_array_spec (&as);
1593 if (gfc_option.flag_cray_pointer && m == MATCH_YES)
1594 cp_as = gfc_copy_array_spec (as);
1595 else if (m == MATCH_ERROR)
1599 as = gfc_copy_array_spec (current_as);
1604 if (current_ts.type == BT_CHARACTER)
1606 switch (match_char_length (&char_len))
1609 cl = gfc_new_charlen (gfc_current_ns, NULL);
1611 cl->length = char_len;
1614 /* Non-constant lengths need to be copied after the first
1615 element. Also copy assumed lengths. */
1618 && (current_ts.u.cl->length == NULL
1619 || current_ts.u.cl->length->expr_type != EXPR_CONSTANT))
1621 cl = gfc_new_charlen (gfc_current_ns, NULL);
1622 cl->length = gfc_copy_expr (current_ts.u.cl->length);
1625 cl = current_ts.u.cl;
1634 /* If this symbol has already shown up in a Cray Pointer declaration,
1635 then we want to set the type & bail out. */
1636 if (gfc_option.flag_cray_pointer)
1638 gfc_find_symbol (name, gfc_current_ns, 1, &sym);
1639 if (sym != NULL && sym->attr.cray_pointee)
1641 sym->ts.type = current_ts.type;
1642 sym->ts.kind = current_ts.kind;
1644 sym->ts.u.derived = current_ts.u.derived;
1645 sym->ts.is_c_interop = current_ts.is_c_interop;
1646 sym->ts.is_iso_c = current_ts.is_iso_c;
1649 /* Check to see if we have an array specification. */
1652 if (sym->as != NULL)
1654 gfc_error ("Duplicate array spec for Cray pointee at %C");
1655 gfc_free_array_spec (cp_as);
1661 if (gfc_set_array_spec (sym, cp_as, &var_locus) == FAILURE)
1662 gfc_internal_error ("Couldn't set pointee array spec.");
1664 /* Fix the array spec. */
1665 m = gfc_mod_pointee_as (sym->as);
1666 if (m == MATCH_ERROR)
1674 gfc_free_array_spec (cp_as);
1678 /* Procedure pointer as function result. */
1679 if (gfc_current_state () == COMP_FUNCTION
1680 && strcmp ("ppr@", gfc_current_block ()->name) == 0
1681 && strcmp (name, gfc_current_block ()->ns->proc_name->name) == 0)
1682 strcpy (name, "ppr@");
1684 if (gfc_current_state () == COMP_FUNCTION
1685 && strcmp (name, gfc_current_block ()->name) == 0
1686 && gfc_current_block ()->result
1687 && strcmp ("ppr@", gfc_current_block ()->result->name) == 0)
1688 strcpy (name, "ppr@");
1690 /* OK, we've successfully matched the declaration. Now put the
1691 symbol in the current namespace, because it might be used in the
1692 optional initialization expression for this symbol, e.g. this is
1695 integer, parameter :: i = huge(i)
1697 This is only true for parameters or variables of a basic type.
1698 For components of derived types, it is not true, so we don't
1699 create a symbol for those yet. If we fail to create the symbol,
1701 if (gfc_current_state () != COMP_DERIVED
1702 && build_sym (name, cl, &as, &var_locus) == FAILURE)
1708 /* An interface body specifies all of the procedure's
1709 characteristics and these shall be consistent with those
1710 specified in the procedure definition, except that the interface
1711 may specify a procedure that is not pure if the procedure is
1712 defined to be pure(12.3.2). */
1713 if (current_ts.type == BT_DERIVED
1714 && gfc_current_ns->proc_name
1715 && gfc_current_ns->proc_name->attr.if_source == IFSRC_IFBODY
1716 && current_ts.u.derived->ns != gfc_current_ns)
1719 st = gfc_find_symtree (gfc_current_ns->sym_root, current_ts.u.derived->name);
1720 if (!(current_ts.u.derived->attr.imported
1722 && st->n.sym == current_ts.u.derived)
1723 && !gfc_current_ns->has_import_set)
1725 gfc_error ("the type of '%s' at %C has not been declared within the "
1732 /* In functions that have a RESULT variable defined, the function
1733 name always refers to function calls. Therefore, the name is
1734 not allowed to appear in specification statements. */
1735 if (gfc_current_state () == COMP_FUNCTION
1736 && gfc_current_block () != NULL
1737 && gfc_current_block ()->result != NULL
1738 && gfc_current_block ()->result != gfc_current_block ()
1739 && strcmp (gfc_current_block ()->name, name) == 0)
1741 gfc_error ("Function name '%s' not allowed at %C", name);
1746 /* We allow old-style initializations of the form
1747 integer i /2/, j(4) /3*3, 1/
1748 (if no colon has been seen). These are different from data
1749 statements in that initializers are only allowed to apply to the
1750 variable immediately preceding, i.e.
1752 is not allowed. Therefore we have to do some work manually, that
1753 could otherwise be left to the matchers for DATA statements. */
1755 if (!colon_seen && gfc_match (" /") == MATCH_YES)
1757 if (gfc_notify_std (GFC_STD_GNU, "Extension: Old-style "
1758 "initialization at %C") == FAILURE)
1761 return match_old_style_init (name);
1764 /* The double colon must be present in order to have initializers.
1765 Otherwise the statement is ambiguous with an assignment statement. */
1768 if (gfc_match (" =>") == MATCH_YES)
1770 if (!current_attr.pointer)
1772 gfc_error ("Initialization at %C isn't for a pointer variable");
1777 m = gfc_match_null (&initializer);
1780 gfc_error ("Pointer initialization requires a NULL() at %C");
1784 if (gfc_pure (NULL) && gfc_state_stack->state != COMP_DERIVED)
1786 gfc_error ("Initialization of pointer at %C is not allowed in "
1787 "a PURE procedure");
1795 else if (gfc_match_char ('=') == MATCH_YES)
1797 if (current_attr.pointer)
1799 gfc_error ("Pointer initialization at %C requires '=>', "
1805 m = gfc_match_init_expr (&initializer);
1808 gfc_error ("Expected an initialization expression at %C");
1812 if (current_attr.flavor != FL_PARAMETER && gfc_pure (NULL))
1814 gfc_error ("Initialization of variable at %C is not allowed in "
1815 "a PURE procedure");
1824 if (initializer != NULL && current_attr.allocatable
1825 && gfc_current_state () == COMP_DERIVED)
1827 gfc_error ("Initialization of allocatable component at %C is not "
1833 /* Add the initializer. Note that it is fine if initializer is
1834 NULL here, because we sometimes also need to check if a
1835 declaration *must* have an initialization expression. */
1836 if (gfc_current_state () != COMP_DERIVED)
1837 t = add_init_expr_to_sym (name, &initializer, &var_locus);
1840 if (current_ts.type == BT_DERIVED
1841 && !current_attr.pointer && !initializer)
1842 initializer = gfc_default_initializer (¤t_ts);
1843 t = build_struct (name, cl, &initializer, &as);
1846 m = (t == SUCCESS) ? MATCH_YES : MATCH_ERROR;
1849 /* Free stuff up and return. */
1850 gfc_free_expr (initializer);
1851 gfc_free_array_spec (as);
1857 /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification.
1858 This assumes that the byte size is equal to the kind number for
1859 non-COMPLEX types, and equal to twice the kind number for COMPLEX. */
1862 gfc_match_old_kind_spec (gfc_typespec *ts)
1867 if (gfc_match_char ('*') != MATCH_YES)
1870 m = gfc_match_small_literal_int (&ts->kind, NULL);
1874 original_kind = ts->kind;
1876 /* Massage the kind numbers for complex types. */
1877 if (ts->type == BT_COMPLEX)
1881 gfc_error ("Old-style type declaration %s*%d not supported at %C",
1882 gfc_basic_typename (ts->type), original_kind);
1888 if (gfc_validate_kind (ts->type, ts->kind, true) < 0)
1890 gfc_error ("Old-style type declaration %s*%d not supported at %C",
1891 gfc_basic_typename (ts->type), original_kind);
1895 if (gfc_notify_std (GFC_STD_GNU, "Nonstandard type declaration %s*%d at %C",
1896 gfc_basic_typename (ts->type), original_kind) == FAILURE)
1903 /* Match a kind specification. Since kinds are generally optional, we
1904 usually return MATCH_NO if something goes wrong. If a "kind="
1905 string is found, then we know we have an error. */
1908 gfc_match_kind_spec (gfc_typespec *ts, bool kind_expr_only)
1920 where = loc = gfc_current_locus;
1925 if (gfc_match_char ('(') == MATCH_NO)
1928 /* Also gobbles optional text. */
1929 if (gfc_match (" kind = ") == MATCH_YES)
1932 loc = gfc_current_locus;
1935 n = gfc_match_init_expr (&e);
1939 if (gfc_matching_function)
1941 /* The function kind expression might include use associated or
1942 imported parameters and try again after the specification
1944 if (gfc_match_char (')') != MATCH_YES)
1946 gfc_error ("Missing right parenthesis at %C");
1952 gfc_undo_symbols ();
1957 /* ....or else, the match is real. */
1959 gfc_error ("Expected initialization expression at %C");
1967 gfc_error ("Expected scalar initialization expression at %C");
1972 msg = gfc_extract_int (e, &ts->kind);
1981 /* Before throwing away the expression, let's see if we had a
1982 C interoperable kind (and store the fact). */
1983 if (e->ts.is_c_interop == 1)
1985 /* Mark this as c interoperable if being declared with one
1986 of the named constants from iso_c_binding. */
1987 ts->is_c_interop = e->ts.is_iso_c;
1988 ts->f90_type = e->ts.f90_type;
1994 /* Ignore errors to this point, if we've gotten here. This means
1995 we ignore the m=MATCH_ERROR from above. */
1996 if (gfc_validate_kind (ts->type, ts->kind, true) < 0)
1998 gfc_error ("Kind %d not supported for type %s at %C", ts->kind,
1999 gfc_basic_typename (ts->type));
2000 gfc_current_locus = where;
2004 /* Warn if, e.g., c_int is used for a REAL variable, but not
2005 if, e.g., c_double is used for COMPLEX as the standard
2006 explicitly says that the kind type parameter for complex and real
2007 variable is the same, i.e. c_float == c_float_complex. */
2008 if (ts->f90_type != BT_UNKNOWN && ts->f90_type != ts->type
2009 && !((ts->f90_type == BT_REAL && ts->type == BT_COMPLEX)
2010 || (ts->f90_type == BT_COMPLEX && ts->type == BT_REAL)))
2011 gfc_warning_now ("C kind type parameter is for type %s but type at %L "
2012 "is %s", gfc_basic_typename (ts->f90_type), &where,
2013 gfc_basic_typename (ts->type));
2015 gfc_gobble_whitespace ();
2016 if ((c = gfc_next_ascii_char ()) != ')'
2017 && (ts->type != BT_CHARACTER || c != ','))
2019 if (ts->type == BT_CHARACTER)
2020 gfc_error ("Missing right parenthesis or comma at %C");
2022 gfc_error ("Missing right parenthesis at %C");
2026 /* All tests passed. */
2029 if(m == MATCH_ERROR)
2030 gfc_current_locus = where;
2032 /* Return what we know from the test(s). */
2037 gfc_current_locus = where;
2043 match_char_kind (int * kind, int * is_iso_c)
2052 where = gfc_current_locus;
2054 n = gfc_match_init_expr (&e);
2056 if (n != MATCH_YES && gfc_matching_function)
2058 /* The expression might include use-associated or imported
2059 parameters and try again after the specification
2062 gfc_undo_symbols ();
2067 gfc_error ("Expected initialization expression at %C");
2073 gfc_error ("Expected scalar initialization expression at %C");
2078 msg = gfc_extract_int (e, kind);
2079 *is_iso_c = e->ts.is_iso_c;
2089 /* Ignore errors to this point, if we've gotten here. This means
2090 we ignore the m=MATCH_ERROR from above. */
2091 if (gfc_validate_kind (BT_CHARACTER, *kind, true) < 0)
2093 gfc_error ("Kind %d is not supported for CHARACTER at %C", *kind);
2097 /* All tests passed. */
2100 if (m == MATCH_ERROR)
2101 gfc_current_locus = where;
2103 /* Return what we know from the test(s). */
2108 gfc_current_locus = where;
2113 /* Match the various kind/length specifications in a CHARACTER
2114 declaration. We don't return MATCH_NO. */
2117 gfc_match_char_spec (gfc_typespec *ts)
2119 int kind, seen_length, is_iso_c;
2129 /* Try the old-style specification first. */
2130 old_char_selector = 0;
2132 m = match_char_length (&len);
2136 old_char_selector = 1;
2141 m = gfc_match_char ('(');
2144 m = MATCH_YES; /* Character without length is a single char. */
2148 /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ). */
2149 if (gfc_match (" kind =") == MATCH_YES)
2151 m = match_char_kind (&kind, &is_iso_c);
2153 if (m == MATCH_ERROR)
2158 if (gfc_match (" , len =") == MATCH_NO)
2161 m = char_len_param_value (&len);
2164 if (m == MATCH_ERROR)
2171 /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>". */
2172 if (gfc_match (" len =") == MATCH_YES)
2174 m = char_len_param_value (&len);
2177 if (m == MATCH_ERROR)
2181 if (gfc_match_char (')') == MATCH_YES)
2184 if (gfc_match (" , kind =") != MATCH_YES)
2187 if (match_char_kind (&kind, &is_iso_c) == MATCH_ERROR)
2193 /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */
2194 m = char_len_param_value (&len);
2197 if (m == MATCH_ERROR)
2201 m = gfc_match_char (')');
2205 if (gfc_match_char (',') != MATCH_YES)
2208 gfc_match (" kind ="); /* Gobble optional text. */
2210 m = match_char_kind (&kind, &is_iso_c);
2211 if (m == MATCH_ERROR)
2217 /* Require a right-paren at this point. */
2218 m = gfc_match_char (')');
2223 gfc_error ("Syntax error in CHARACTER declaration at %C");
2225 gfc_free_expr (len);
2229 /* Deal with character functions after USE and IMPORT statements. */
2230 if (gfc_matching_function)
2232 gfc_free_expr (len);
2233 gfc_undo_symbols ();
2239 gfc_free_expr (len);
2243 /* Do some final massaging of the length values. */
2244 cl = gfc_new_charlen (gfc_current_ns, NULL);
2246 if (seen_length == 0)
2247 cl->length = gfc_int_expr (1);
2252 ts->kind = kind == 0 ? gfc_default_character_kind : kind;
2254 /* We have to know if it was a c interoperable kind so we can
2255 do accurate type checking of bind(c) procs, etc. */
2257 /* Mark this as c interoperable if being declared with one
2258 of the named constants from iso_c_binding. */
2259 ts->is_c_interop = is_iso_c;
2260 else if (len != NULL)
2261 /* Here, we might have parsed something such as: character(c_char)
2262 In this case, the parsing code above grabs the c_char when
2263 looking for the length (line 1690, roughly). it's the last
2264 testcase for parsing the kind params of a character variable.
2265 However, it's not actually the length. this seems like it
2267 To see if the user used a C interop kind, test the expr
2268 of the so called length, and see if it's C interoperable. */
2269 ts->is_c_interop = len->ts.is_iso_c;
2275 /* Matches a declaration-type-spec (F03:R502). If successful, sets the ts
2276 structure to the matched specification. This is necessary for FUNCTION and
2277 IMPLICIT statements.
2279 If implicit_flag is nonzero, then we don't check for the optional
2280 kind specification. Not doing so is needed for matching an IMPLICIT
2281 statement correctly. */
2284 gfc_match_decl_type_spec (gfc_typespec *ts, int implicit_flag)
2286 char name[GFC_MAX_SYMBOL_LEN + 1];
2290 bool seen_deferred_kind;
2292 /* A belt and braces check that the typespec is correctly being treated
2293 as a deferred characteristic association. */
2294 seen_deferred_kind = (gfc_current_state () == COMP_FUNCTION)
2295 && (gfc_current_block ()->result->ts.kind == -1)
2296 && (ts->kind == -1);
2298 if (seen_deferred_kind)
2301 /* Clear the current binding label, in case one is given. */
2302 curr_binding_label[0] = '\0';
2304 if (gfc_match (" byte") == MATCH_YES)
2306 if (gfc_notify_std (GFC_STD_GNU, "Extension: BYTE type at %C")
2310 if (gfc_validate_kind (BT_INTEGER, 1, true) < 0)
2312 gfc_error ("BYTE type used at %C "
2313 "is not available on the target machine");
2317 ts->type = BT_INTEGER;
2322 if (gfc_match (" integer") == MATCH_YES)
2324 ts->type = BT_INTEGER;
2325 ts->kind = gfc_default_integer_kind;
2329 if (gfc_match (" character") == MATCH_YES)
2331 ts->type = BT_CHARACTER;
2332 if (implicit_flag == 0)
2333 return gfc_match_char_spec (ts);
2338 if (gfc_match (" real") == MATCH_YES)
2341 ts->kind = gfc_default_real_kind;
2345 if (gfc_match (" double precision") == MATCH_YES)
2348 ts->kind = gfc_default_double_kind;
2352 if (gfc_match (" complex") == MATCH_YES)
2354 ts->type = BT_COMPLEX;
2355 ts->kind = gfc_default_complex_kind;
2359 if (gfc_match (" double complex") == MATCH_YES)
2361 if (gfc_notify_std (GFC_STD_GNU, "DOUBLE COMPLEX at %C does not "
2362 "conform to the Fortran 95 standard") == FAILURE)
2365 ts->type = BT_COMPLEX;
2366 ts->kind = gfc_default_double_kind;
2370 if (gfc_match (" logical") == MATCH_YES)
2372 ts->type = BT_LOGICAL;
2373 ts->kind = gfc_default_logical_kind;
2377 m = gfc_match (" type ( %n )", name);
2379 ts->type = BT_DERIVED;
2382 m = gfc_match (" class ( %n )", name);
2385 ts->type = BT_CLASS;
2387 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: CLASS statement at %C")
2392 /* Defer association of the derived type until the end of the
2393 specification block. However, if the derived type can be
2394 found, add it to the typespec. */
2395 if (gfc_matching_function)
2397 ts->u.derived = NULL;
2398 if (gfc_current_state () != COMP_INTERFACE
2399 && !gfc_find_symbol (name, NULL, 1, &sym) && sym)
2400 ts->u.derived = sym;
2404 /* Search for the name but allow the components to be defined later. If
2405 type = -1, this typespec has been seen in a function declaration but
2406 the type could not be accessed at that point. */
2408 if (ts->kind != -1 && gfc_get_ha_symbol (name, &sym))
2410 gfc_error ("Type name '%s' at %C is ambiguous", name);
2413 else if (ts->kind == -1)
2415 int iface = gfc_state_stack->previous->state != COMP_INTERFACE
2416 || gfc_current_ns->has_import_set;
2417 if (gfc_find_symbol (name, NULL, iface, &sym))
2419 gfc_error ("Type name '%s' at %C is ambiguous", name);
2428 if (sym->attr.flavor != FL_DERIVED
2429 && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE)
2432 gfc_set_sym_referenced (sym);
2433 ts->u.derived = sym;
2438 /* For all types except double, derived and character, look for an
2439 optional kind specifier. MATCH_NO is actually OK at this point. */
2440 if (implicit_flag == 1)
2443 if (gfc_current_form == FORM_FREE)
2445 c = gfc_peek_ascii_char ();
2446 if (!gfc_is_whitespace (c) && c != '*' && c != '('
2447 && c != ':' && c != ',')
2451 m = gfc_match_kind_spec (ts, false);
2452 if (m == MATCH_NO && ts->type != BT_CHARACTER)
2453 m = gfc_match_old_kind_spec (ts);
2455 /* Defer association of the KIND expression of function results
2456 until after USE and IMPORT statements. */
2457 if ((gfc_current_state () == COMP_NONE && gfc_error_flag_test ())
2458 || gfc_matching_function)
2462 m = MATCH_YES; /* No kind specifier found. */
2468 /* Match an IMPLICIT NONE statement. Actually, this statement is
2469 already matched in parse.c, or we would not end up here in the
2470 first place. So the only thing we need to check, is if there is
2471 trailing garbage. If not, the match is successful. */
2474 gfc_match_implicit_none (void)
2476 return (gfc_match_eos () == MATCH_YES) ? MATCH_YES : MATCH_NO;
2480 /* Match the letter range(s) of an IMPLICIT statement. */
2483 match_implicit_range (void)
2489 cur_loc = gfc_current_locus;
2491 gfc_gobble_whitespace ();
2492 c = gfc_next_ascii_char ();
2495 gfc_error ("Missing character range in IMPLICIT at %C");
2502 gfc_gobble_whitespace ();
2503 c1 = gfc_next_ascii_char ();
2507 gfc_gobble_whitespace ();
2508 c = gfc_next_ascii_char ();
2513 inner = 0; /* Fall through. */
2520 gfc_gobble_whitespace ();
2521 c2 = gfc_next_ascii_char ();
2525 gfc_gobble_whitespace ();
2526 c = gfc_next_ascii_char ();
2528 if ((c != ',') && (c != ')'))
2541 gfc_error ("Letters must be in alphabetic order in "
2542 "IMPLICIT statement at %C");
2546 /* See if we can add the newly matched range to the pending
2547 implicits from this IMPLICIT statement. We do not check for
2548 conflicts with whatever earlier IMPLICIT statements may have
2549 set. This is done when we've successfully finished matching
2551 if (gfc_add_new_implicit_range (c1, c2) != SUCCESS)
2558 gfc_syntax_error (ST_IMPLICIT);
2560 gfc_current_locus = cur_loc;
2565 /* Match an IMPLICIT statement, storing the types for
2566 gfc_set_implicit() if the statement is accepted by the parser.
2567 There is a strange looking, but legal syntactic construction
2568 possible. It looks like:
2570 IMPLICIT INTEGER (a-b) (c-d)
2572 This is legal if "a-b" is a constant expression that happens to
2573 equal one of the legal kinds for integers. The real problem
2574 happens with an implicit specification that looks like:
2576 IMPLICIT INTEGER (a-b)
2578 In this case, a typespec matcher that is "greedy" (as most of the
2579 matchers are) gobbles the character range as a kindspec, leaving
2580 nothing left. We therefore have to go a bit more slowly in the
2581 matching process by inhibiting the kindspec checking during
2582 typespec matching and checking for a kind later. */
2585 gfc_match_implicit (void)
2594 /* We don't allow empty implicit statements. */
2595 if (gfc_match_eos () == MATCH_YES)
2597 gfc_error ("Empty IMPLICIT statement at %C");
2603 /* First cleanup. */
2604 gfc_clear_new_implicit ();
2606 /* A basic type is mandatory here. */
2607 m = gfc_match_decl_type_spec (&ts, 1);
2608 if (m == MATCH_ERROR)
2613 cur_loc = gfc_current_locus;
2614 m = match_implicit_range ();
2618 /* We may have <TYPE> (<RANGE>). */
2619 gfc_gobble_whitespace ();
2620 c = gfc_next_ascii_char ();
2621 if ((c == '\n') || (c == ','))
2623 /* Check for CHARACTER with no length parameter. */
2624 if (ts.type == BT_CHARACTER && !ts.u.cl)
2626 ts.kind = gfc_default_character_kind;
2627 ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL);
2628 ts.u.cl->length = gfc_int_expr (1);
2631 /* Record the Successful match. */
2632 if (gfc_merge_new_implicit (&ts) != SUCCESS)
2637 gfc_current_locus = cur_loc;
2640 /* Discard the (incorrectly) matched range. */
2641 gfc_clear_new_implicit ();
2643 /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */
2644 if (ts.type == BT_CHARACTER)
2645 m = gfc_match_char_spec (&ts);
2648 m = gfc_match_kind_spec (&ts, false);
2651 m = gfc_match_old_kind_spec (&ts);
2652 if (m == MATCH_ERROR)
2658 if (m == MATCH_ERROR)
2661 m = match_implicit_range ();
2662 if (m == MATCH_ERROR)
2667 gfc_gobble_whitespace ();
2668 c = gfc_next_ascii_char ();
2669 if ((c != '\n') && (c != ','))
2672 if (gfc_merge_new_implicit (&ts) != SUCCESS)
2680 gfc_syntax_error (ST_IMPLICIT);
2688 gfc_match_import (void)
2690 char name[GFC_MAX_SYMBOL_LEN + 1];
2695 if (gfc_current_ns->proc_name == NULL
2696 || gfc_current_ns->proc_name->attr.if_source != IFSRC_IFBODY)
2698 gfc_error ("IMPORT statement at %C only permitted in "
2699 "an INTERFACE body");
2703 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IMPORT statement at %C")
2707 if (gfc_match_eos () == MATCH_YES)
2709 /* All host variables should be imported. */
2710 gfc_current_ns->has_import_set = 1;
2714 if (gfc_match (" ::") == MATCH_YES)
2716 if (gfc_match_eos () == MATCH_YES)
2718 gfc_error ("Expecting list of named entities at %C");
2725 m = gfc_match (" %n", name);
2729 if (gfc_current_ns->parent != NULL
2730 && gfc_find_symbol (name, gfc_current_ns->parent, 1, &sym))
2732 gfc_error ("Type name '%s' at %C is ambiguous", name);
2735 else if (gfc_current_ns->proc_name->ns->parent != NULL
2736 && gfc_find_symbol (name,
2737 gfc_current_ns->proc_name->ns->parent,
2740 gfc_error ("Type name '%s' at %C is ambiguous", name);
2746 gfc_error ("Cannot IMPORT '%s' from host scoping unit "
2747 "at %C - does not exist.", name);
2751 if (gfc_find_symtree (gfc_current_ns->sym_root,name))
2753 gfc_warning ("'%s' is already IMPORTed from host scoping unit "
2758 st = gfc_new_symtree (&gfc_current_ns->sym_root, sym->name);
2761 sym->attr.imported = 1;
2773 if (gfc_match_eos () == MATCH_YES)
2775 if (gfc_match_char (',') != MATCH_YES)
2782 gfc_error ("Syntax error in IMPORT statement at %C");
2787 /* A minimal implementation of gfc_match without whitespace, escape
2788 characters or variable arguments. Returns true if the next
2789 characters match the TARGET template exactly. */
2792 match_string_p (const char *target)
2796 for (p = target; *p; p++)
2797 if ((char) gfc_next_ascii_char () != *p)
2802 /* Matches an attribute specification including array specs. If
2803 successful, leaves the variables current_attr and current_as
2804 holding the specification. Also sets the colon_seen variable for
2805 later use by matchers associated with initializations.
2807 This subroutine is a little tricky in the sense that we don't know
2808 if we really have an attr-spec until we hit the double colon.
2809 Until that time, we can only return MATCH_NO. This forces us to
2810 check for duplicate specification at this level. */
2813 match_attr_spec (void)
2815 /* Modifiers that can exist in a type statement. */
2817 { GFC_DECL_BEGIN = 0,
2818 DECL_ALLOCATABLE = GFC_DECL_BEGIN, DECL_DIMENSION, DECL_EXTERNAL,
2819 DECL_IN, DECL_OUT, DECL_INOUT, DECL_INTRINSIC, DECL_OPTIONAL,
2820 DECL_PARAMETER, DECL_POINTER, DECL_PROTECTED, DECL_PRIVATE,
2821 DECL_PUBLIC, DECL_SAVE, DECL_TARGET, DECL_VALUE, DECL_VOLATILE,
2822 DECL_IS_BIND_C, DECL_NONE,
2823 GFC_DECL_END /* Sentinel */
2827 /* GFC_DECL_END is the sentinel, index starts at 0. */
2828 #define NUM_DECL GFC_DECL_END
2830 locus start, seen_at[NUM_DECL];
2837 gfc_clear_attr (¤t_attr);
2838 start = gfc_current_locus;
2843 /* See if we get all of the keywords up to the final double colon. */
2844 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
2852 gfc_gobble_whitespace ();
2854 ch = gfc_next_ascii_char ();
2857 /* This is the successful exit condition for the loop. */
2858 if (gfc_next_ascii_char () == ':')
2863 gfc_gobble_whitespace ();
2864 switch (gfc_peek_ascii_char ())
2867 if (match_string_p ("allocatable"))
2868 d = DECL_ALLOCATABLE;
2872 /* Try and match the bind(c). */
2873 m = gfc_match_bind_c (NULL, true);
2876 else if (m == MATCH_ERROR)
2881 if (match_string_p ("dimension"))
2886 if (match_string_p ("external"))
2891 if (match_string_p ("int"))
2893 ch = gfc_next_ascii_char ();
2896 if (match_string_p ("nt"))
2898 /* Matched "intent". */
2899 /* TODO: Call match_intent_spec from here. */
2900 if (gfc_match (" ( in out )") == MATCH_YES)
2902 else if (gfc_match (" ( in )") == MATCH_YES)
2904 else if (gfc_match (" ( out )") == MATCH_YES)
2910 if (match_string_p ("insic"))
2912 /* Matched "intrinsic". */
2920 if (match_string_p ("optional"))
2925 gfc_next_ascii_char ();
2926 switch (gfc_next_ascii_char ())
2929 if (match_string_p ("rameter"))
2931 /* Matched "parameter". */
2937 if (match_string_p ("inter"))
2939 /* Matched "pointer". */
2945 ch = gfc_next_ascii_char ();
2948 if (match_string_p ("vate"))
2950 /* Matched "private". */
2956 if (match_string_p ("tected"))
2958 /* Matched "protected". */
2965 if (match_string_p ("blic"))
2967 /* Matched "public". */
2975 if (match_string_p ("save"))
2980 if (match_string_p ("target"))
2985 gfc_next_ascii_char ();
2986 ch = gfc_next_ascii_char ();
2989 if (match_string_p ("lue"))
2991 /* Matched "value". */
2997 if (match_string_p ("latile"))
2999 /* Matched "volatile". */
3007 /* No double colon and no recognizable decl_type, so assume that
3008 we've been looking at something else the whole time. */
3015 /* Check to make sure any parens are paired up correctly. */
3016 if (gfc_match_parens () == MATCH_ERROR)
3023 seen_at[d] = gfc_current_locus;
3025 if (d == DECL_DIMENSION)
3027 m = gfc_match_array_spec (¤t_as);
3031 gfc_error ("Missing dimension specification at %C");
3035 if (m == MATCH_ERROR)
3040 /* Since we've seen a double colon, we have to be looking at an
3041 attr-spec. This means that we can now issue errors. */
3042 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
3047 case DECL_ALLOCATABLE:
3048 attr = "ALLOCATABLE";
3050 case DECL_DIMENSION:
3057 attr = "INTENT (IN)";
3060 attr = "INTENT (OUT)";
3063 attr = "INTENT (IN OUT)";
3065 case DECL_INTRINSIC:
3071 case DECL_PARAMETER:
3077 case DECL_PROTECTED:
3092 case DECL_IS_BIND_C:
3102 attr = NULL; /* This shouldn't happen. */
3105 gfc_error ("Duplicate %s attribute at %L", attr, &seen_at[d]);
3110 /* Now that we've dealt with duplicate attributes, add the attributes
3111 to the current attribute. */
3112 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
3117 if (gfc_current_state () == COMP_DERIVED
3118 && d != DECL_DIMENSION && d != DECL_POINTER
3119 && d != DECL_PRIVATE && d != DECL_PUBLIC
3122 if (d == DECL_ALLOCATABLE)
3124 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ALLOCATABLE "
3125 "attribute at %C in a TYPE definition")
3134 gfc_error ("Attribute at %L is not allowed in a TYPE definition",
3141 if ((d == DECL_PRIVATE || d == DECL_PUBLIC)
3142 && gfc_current_state () != COMP_MODULE)
3144 if (d == DECL_PRIVATE)
3148 if (gfc_current_state () == COMP_DERIVED
3149 && gfc_state_stack->previous
3150 && gfc_state_stack->previous->state == COMP_MODULE)
3152 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Attribute %s "
3153 "at %L in a TYPE definition", attr,
3163 gfc_error ("%s attribute at %L is not allowed outside of the "
3164 "specification part of a module", attr, &seen_at[d]);
3172 case DECL_ALLOCATABLE:
3173 t = gfc_add_allocatable (¤t_attr, &seen_at[d]);
3176 case DECL_DIMENSION:
3177 t = gfc_add_dimension (¤t_attr, NULL, &seen_at[d]);
3181 t = gfc_add_external (¤t_attr, &seen_at[d]);
3185 t = gfc_add_intent (¤t_attr, INTENT_IN, &seen_at[d]);
3189 t = gfc_add_intent (¤t_attr, INTENT_OUT, &seen_at[d]);
3193 t = gfc_add_intent (¤t_attr, INTENT_INOUT, &seen_at[d]);
3196 case DECL_INTRINSIC:
3197 t = gfc_add_intrinsic (¤t_attr, &seen_at[d]);
3201 t = gfc_add_optional (¤t_attr, &seen_at[d]);
3204 case DECL_PARAMETER:
3205 t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, &seen_at[d]);
3209 t = gfc_add_pointer (¤t_attr, &seen_at[d]);
3212 case DECL_PROTECTED:
3213 if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE)
3215 gfc_error ("PROTECTED at %C only allowed in specification "
3216 "part of a module");
3221 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED "
3226 t = gfc_add_protected (¤t_attr, NULL, &seen_at[d]);
3230 t = gfc_add_access (¤t_attr, ACCESS_PRIVATE, NULL,
3235 t = gfc_add_access (¤t_attr, ACCESS_PUBLIC, NULL,
3240 t = gfc_add_save (¤t_attr, NULL, &seen_at[d]);
3244 t = gfc_add_target (¤t_attr, &seen_at[d]);
3247 case DECL_IS_BIND_C:
3248 t = gfc_add_is_bind_c(¤t_attr, NULL, &seen_at[d], 0);
3252 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE attribute "
3257 t = gfc_add_value (¤t_attr, NULL, &seen_at[d]);
3261 if (gfc_notify_std (GFC_STD_F2003,
3262 "Fortran 2003: VOLATILE attribute at %C")
3266 t = gfc_add_volatile (¤t_attr, NULL, &seen_at[d]);
3270 gfc_internal_error ("match_attr_spec(): Bad attribute");
3284 gfc_current_locus = start;
3285 gfc_free_array_spec (current_as);
3291 /* Set the binding label, dest_label, either with the binding label
3292 stored in the given gfc_typespec, ts, or if none was provided, it
3293 will be the symbol name in all lower case, as required by the draft
3294 (J3/04-007, section 15.4.1). If a binding label was given and
3295 there is more than one argument (num_idents), it is an error. */
3298 set_binding_label (char *dest_label, const char *sym_name, int num_idents)
3300 if (num_idents > 1 && has_name_equals)
3302 gfc_error ("Multiple identifiers provided with "
3303 "single NAME= specifier at %C");
3307 if (curr_binding_label[0] != '\0')
3309 /* Binding label given; store in temp holder til have sym. */
3310 strcpy (dest_label, curr_binding_label);
3314 /* No binding label given, and the NAME= specifier did not exist,
3315 which means there was no NAME="". */
3316 if (sym_name != NULL && has_name_equals == 0)
3317 strcpy (dest_label, sym_name);
3324 /* Set the status of the given common block as being BIND(C) or not,
3325 depending on the given parameter, is_bind_c. */
3328 set_com_block_bind_c (gfc_common_head *com_block, int is_bind_c)
3330 com_block->is_bind_c = is_bind_c;
3335 /* Verify that the given gfc_typespec is for a C interoperable type. */
3338 verify_c_interop (gfc_typespec *ts)
3340 if (ts->type == BT_DERIVED && ts->u.derived != NULL)
3341 return (ts->u.derived->ts.is_c_interop ? SUCCESS : FAILURE);
3342 else if (ts->is_c_interop != 1)
3349 /* Verify that the variables of a given common block, which has been
3350 defined with the attribute specifier bind(c), to be of a C
3351 interoperable type. Errors will be reported here, if
3355 verify_com_block_vars_c_interop (gfc_common_head *com_block)
3357 gfc_symbol *curr_sym = NULL;
3358 gfc_try retval = SUCCESS;
3360 curr_sym = com_block->head;
3362 /* Make sure we have at least one symbol. */
3363 if (curr_sym == NULL)
3366 /* Here we know we have a symbol, so we'll execute this loop
3370 /* The second to last param, 1, says this is in a common block. */
3371 retval = verify_bind_c_sym (curr_sym, &(curr_sym->ts), 1, com_block);
3372 curr_sym = curr_sym->common_next;
3373 } while (curr_sym != NULL);
3379 /* Verify that a given BIND(C) symbol is C interoperable. If it is not,
3380 an appropriate error message is reported. */
3383 verify_bind_c_sym (gfc_symbol *tmp_sym, gfc_typespec *ts,
3384 int is_in_common, gfc_common_head *com_block)
3386 bool bind_c_function = false;
3387 gfc_try retval = SUCCESS;
3389 if (tmp_sym->attr.function && tmp_sym->attr.is_bind_c)
3390 bind_c_function = true;
3392 if (tmp_sym->attr.function && tmp_sym->result != NULL)
3394 tmp_sym = tmp_sym->result;
3395 /* Make sure it wasn't an implicitly typed result. */
3396 if (tmp_sym->attr.implicit_type)
3398 gfc_warning ("Implicitly declared BIND(C) function '%s' at "
3399 "%L may not be C interoperable", tmp_sym->name,
3400 &tmp_sym->declared_at);
3401 tmp_sym->ts.f90_type = tmp_sym->ts.type;
3402 /* Mark it as C interoperable to prevent duplicate warnings. */
3403 tmp_sym->ts.is_c_interop = 1;
3404 tmp_sym->attr.is_c_interop = 1;
3408 /* Here, we know we have the bind(c) attribute, so if we have
3409 enough type info, then verify that it's a C interop kind.
3410 The info could be in the symbol already, or possibly still in
3411 the given ts (current_ts), so look in both. */
3412 if (tmp_sym->ts.type != BT_UNKNOWN || ts->type != BT_UNKNOWN)
3414 if (verify_c_interop (&(tmp_sym->ts)) != SUCCESS)
3416 /* See if we're dealing with a sym in a common block or not. */
3417 if (is_in_common == 1)
3419 gfc_warning ("Variable '%s' in common block '%s' at %L "
3420 "may not be a C interoperable "
3421 "kind though common block '%s' is BIND(C)",
3422 tmp_sym->name, com_block->name,
3423 &(tmp_sym->declared_at), com_block->name);
3427 if (tmp_sym->ts.type == BT_DERIVED || ts->type == BT_DERIVED)
3428 gfc_error ("Type declaration '%s' at %L is not C "
3429 "interoperable but it is BIND(C)",
3430 tmp_sym->name, &(tmp_sym->declared_at));
3432 gfc_warning ("Variable '%s' at %L "
3433 "may not be a C interoperable "
3434 "kind but it is bind(c)",
3435 tmp_sym->name, &(tmp_sym->declared_at));
3439 /* Variables declared w/in a common block can't be bind(c)
3440 since there's no way for C to see these variables, so there's
3441 semantically no reason for the attribute. */
3442 if (is_in_common == 1 && tmp_sym->attr.is_bind_c == 1)
3444 gfc_error ("Variable '%s' in common block '%s' at "
3445 "%L cannot be declared with BIND(C) "
3446 "since it is not a global",
3447 tmp_sym->name, com_block->name,
3448 &(tmp_sym->declared_at));
3452 /* Scalar variables that are bind(c) can not have the pointer
3453 or allocatable attributes. */
3454 if (tmp_sym->attr.is_bind_c == 1)
3456 if (tmp_sym->attr.pointer == 1)
3458 gfc_error ("Variable '%s' at %L cannot have both the "
3459 "POINTER and BIND(C) attributes",
3460 tmp_sym->name, &(tmp_sym->declared_at));
3464 if (tmp_sym->attr.allocatable == 1)
3466 gfc_error ("Variable '%s' at %L cannot have both the "
3467 "ALLOCATABLE and BIND(C) attributes",
3468 tmp_sym->name, &(tmp_sym->declared_at));
3474 /* If it is a BIND(C) function, make sure the return value is a
3475 scalar value. The previous tests in this function made sure
3476 the type is interoperable. */
3477 if (bind_c_function && tmp_sym->as != NULL)
3478 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3479 "be an array", tmp_sym->name, &(tmp_sym->declared_at));
3481 /* BIND(C) functions can not return a character string. */
3482 if (bind_c_function && tmp_sym->ts.type == BT_CHARACTER)
3483 if (tmp_sym->ts.u.cl == NULL || tmp_sym->ts.u.cl->length == NULL
3484 || tmp_sym->ts.u.cl->length->expr_type != EXPR_CONSTANT
3485 || mpz_cmp_si (tmp_sym->ts.u.cl->length->value.integer, 1) != 0)
3486 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3487 "be a character string", tmp_sym->name,
3488 &(tmp_sym->declared_at));
3491 /* See if the symbol has been marked as private. If it has, make sure
3492 there is no binding label and warn the user if there is one. */
3493 if (tmp_sym->attr.access == ACCESS_PRIVATE
3494 && tmp_sym->binding_label[0] != '\0')
3495 /* Use gfc_warning_now because we won't say that the symbol fails
3496 just because of this. */
3497 gfc_warning_now ("Symbol '%s' at %L is marked PRIVATE but has been "
3498 "given the binding label '%s'", tmp_sym->name,
3499 &(tmp_sym->declared_at), tmp_sym->binding_label);
3505 /* Set the appropriate fields for a symbol that's been declared as
3506 BIND(C) (the is_bind_c flag and the binding label), and verify that
3507 the type is C interoperable. Errors are reported by the functions
3508 used to set/test these fields. */
3511 set_verify_bind_c_sym (gfc_symbol *tmp_sym, int num_idents)
3513 gfc_try retval = SUCCESS;
3515 /* TODO: Do we need to make sure the vars aren't marked private? */
3517 /* Set the is_bind_c bit in symbol_attribute. */
3518 gfc_add_is_bind_c (&(tmp_sym->attr), tmp_sym->name, &gfc_current_locus, 0);
3520 if (set_binding_label (tmp_sym->binding_label, tmp_sym->name,
3521 num_idents) != SUCCESS)
3528 /* Set the fields marking the given common block as BIND(C), including
3529 a binding label, and report any errors encountered. */
3532 set_verify_bind_c_com_block (gfc_common_head *com_block, int num_idents)
3534 gfc_try retval = SUCCESS;
3536 /* destLabel, common name, typespec (which may have binding label). */
3537 if (set_binding_label (com_block->binding_label, com_block->name, num_idents)
3541 /* Set the given common block (com_block) to being bind(c) (1). */
3542 set_com_block_bind_c (com_block, 1);
3548 /* Retrieve the list of one or more identifiers that the given bind(c)
3549 attribute applies to. */
3552 get_bind_c_idents (void)
3554 char name[GFC_MAX_SYMBOL_LEN + 1];
3556 gfc_symbol *tmp_sym = NULL;
3558 gfc_common_head *com_block = NULL;
3560 if (gfc_match_name (name) == MATCH_YES)
3562 found_id = MATCH_YES;
3563 gfc_get_ha_symbol (name, &tmp_sym);
3565 else if (match_common_name (name) == MATCH_YES)
3567 found_id = MATCH_YES;
3568 com_block = gfc_get_common (name, 0);
3572 gfc_error ("Need either entity or common block name for "
3573 "attribute specification statement at %C");
3577 /* Save the current identifier and look for more. */
3580 /* Increment the number of identifiers found for this spec stmt. */
3583 /* Make sure we have a sym or com block, and verify that it can
3584 be bind(c). Set the appropriate field(s) and look for more
3586 if (tmp_sym != NULL || com_block != NULL)
3588 if (tmp_sym != NULL)
3590 if (set_verify_bind_c_sym (tmp_sym, num_idents)
3596 if (set_verify_bind_c_com_block(com_block, num_idents)
3601 /* Look to see if we have another identifier. */
3603 if (gfc_match_eos () == MATCH_YES)
3604 found_id = MATCH_NO;
3605 else if (gfc_match_char (',') != MATCH_YES)
3606 found_id = MATCH_NO;
3607 else if (gfc_match_name (name) == MATCH_YES)
3609 found_id = MATCH_YES;
3610 gfc_get_ha_symbol (name, &tmp_sym);
3612 else if (match_common_name (name) == MATCH_YES)
3614 found_id = MATCH_YES;
3615 com_block = gfc_get_common (name, 0);
3619 gfc_error ("Missing entity or common block name for "
3620 "attribute specification statement at %C");
3626 gfc_internal_error ("Missing symbol");
3628 } while (found_id == MATCH_YES);
3630 /* if we get here we were successful */
3635 /* Try and match a BIND(C) attribute specification statement. */
3638 gfc_match_bind_c_stmt (void)
3640 match found_match = MATCH_NO;
3645 /* This may not be necessary. */
3647 /* Clear the temporary binding label holder. */
3648 curr_binding_label[0] = '\0';
3650 /* Look for the bind(c). */
3651 found_match = gfc_match_bind_c (NULL, true);
3653 if (found_match == MATCH_YES)
3655 /* Look for the :: now, but it is not required. */
3658 /* Get the identifier(s) that needs to be updated. This may need to
3659 change to hand the flag(s) for the attr specified so all identifiers
3660 found can have all appropriate parts updated (assuming that the same
3661 spec stmt can have multiple attrs, such as both bind(c) and
3663 if (get_bind_c_idents () != SUCCESS)
3664 /* Error message should have printed already. */
3672 /* Match a data declaration statement. */
3675 gfc_match_data_decl (void)
3681 num_idents_on_line = 0;
3683 m = gfc_match_decl_type_spec (¤t_ts, 0);
3687 if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS)
3688 && gfc_current_state () != COMP_DERIVED)
3690 sym = gfc_use_derived (current_ts.u.derived);
3698 current_ts.u.derived = sym;
3701 m = match_attr_spec ();
3702 if (m == MATCH_ERROR)
3708 if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS)
3709 && current_ts.u.derived->components == NULL
3710 && !current_ts.u.derived->attr.zero_comp)
3713 if (current_attr.pointer && gfc_current_state () == COMP_DERIVED)
3716 gfc_find_symbol (current_ts.u.derived->name,
3717 current_ts.u.derived->ns->parent, 1, &sym);
3719 /* Any symbol that we find had better be a type definition
3720 which has its components defined. */
3721 if (sym != NULL && sym->attr.flavor == FL_DERIVED
3722 && (current_ts.u.derived->components != NULL
3723 || current_ts.u.derived->attr.zero_comp))
3726 /* Now we have an error, which we signal, and then fix up
3727 because the knock-on is plain and simple confusing. */
3728 gfc_error_now ("Derived type at %C has not been previously defined "
3729 "and so cannot appear in a derived type definition");
3730 current_attr.pointer = 1;
3735 /* If we have an old-style character declaration, and no new-style
3736 attribute specifications, then there a comma is optional between
3737 the type specification and the variable list. */
3738 if (m == MATCH_NO && current_ts.type == BT_CHARACTER && old_char_selector)
3739 gfc_match_char (',');
3741 /* Give the types/attributes to symbols that follow. Give the element
3742 a number so that repeat character length expressions can be copied. */
3746 num_idents_on_line++;
3747 m = variable_decl (elem++);
3748 if (m == MATCH_ERROR)
3753 if (gfc_match_eos () == MATCH_YES)
3755 if (gfc_match_char (',') != MATCH_YES)
3759 if (gfc_error_flag_test () == 0)
3760 gfc_error ("Syntax error in data declaration at %C");
3763 gfc_free_data_all (gfc_current_ns);
3766 gfc_free_array_spec (current_as);
3772 /* Match a prefix associated with a function or subroutine
3773 declaration. If the typespec pointer is nonnull, then a typespec
3774 can be matched. Note that if nothing matches, MATCH_YES is
3775 returned (the null string was matched). */
3778 gfc_match_prefix (gfc_typespec *ts)
3782 gfc_clear_attr (¤t_attr);
3785 gcc_assert (!gfc_matching_prefix);
3786 gfc_matching_prefix = true;
3789 if (!seen_type && ts != NULL
3790 && gfc_match_decl_type_spec (ts, 0) == MATCH_YES
3791 && gfc_match_space () == MATCH_YES)
3798 if (gfc_match ("elemental% ") == MATCH_YES)
3800 if (gfc_add_elemental (¤t_attr, NULL) == FAILURE)
3806 if (gfc_match ("pure% ") == MATCH_YES)
3808 if (gfc_add_pure (¤t_attr, NULL) == FAILURE)
3814 if (gfc_match ("recursive% ") == MATCH_YES)
3816 if (gfc_add_recursive (¤t_attr, NULL) == FAILURE)
3822 /* At this point, the next item is not a prefix. */
3823 gcc_assert (gfc_matching_prefix);
3824 gfc_matching_prefix = false;
3828 gcc_assert (gfc_matching_prefix);
3829 gfc_matching_prefix = false;
3834 /* Copy attributes matched by gfc_match_prefix() to attributes on a symbol. */
3837 copy_prefix (symbol_attribute *dest, locus *where)
3839 if (current_attr.pure && gfc_add_pure (dest, where) == FAILURE)
3842 if (current_attr.elemental && gfc_add_elemental (dest, where) == FAILURE)
3845 if (current_attr.recursive && gfc_add_recursive (dest, where) == FAILURE)
3852 /* Match a formal argument list. */
3855 gfc_match_formal_arglist (gfc_symbol *progname, int st_flag, int null_flag)
3857 gfc_formal_arglist *head, *tail, *p, *q;
3858 char name[GFC_MAX_SYMBOL_LEN + 1];
3864 if (gfc_match_char ('(') != MATCH_YES)
3871 if (gfc_match_char (')') == MATCH_YES)
3876 if (gfc_match_char ('*') == MATCH_YES)
3880 m = gfc_match_name (name);
3884 if (gfc_get_symbol (name, NULL, &sym))
3888 p = gfc_get_formal_arglist ();
3900 /* We don't add the VARIABLE flavor because the name could be a
3901 dummy procedure. We don't apply these attributes to formal
3902 arguments of statement functions. */
3903 if (sym != NULL && !st_flag
3904 && (gfc_add_dummy (&sym->attr, sym->name, NULL) == FAILURE
3905 || gfc_missing_attr (&sym->attr, NULL) == FAILURE))
3911 /* The name of a program unit can be in a different namespace,
3912 so check for it explicitly. After the statement is accepted,
3913 the name is checked for especially in gfc_get_symbol(). */
3914 if (gfc_new_block != NULL && sym != NULL
3915 && strcmp (sym->name, gfc_new_block->name) == 0)
3917 gfc_error ("Name '%s' at %C is the name of the procedure",
3923 if (gfc_match_char (')') == MATCH_YES)
3926 m = gfc_match_char (',');
3929 gfc_error ("Unexpected junk in formal argument list at %C");
3935 /* Check for duplicate symbols in the formal argument list. */
3938 for (p = head; p->next; p = p->next)
3943 for (q = p->next; q; q = q->next)
3944 if (p->sym == q->sym)
3946 gfc_error ("Duplicate symbol '%s' in formal argument list "
3947 "at %C", p->sym->name);
3955 if (gfc_add_explicit_interface (progname, IFSRC_DECL, head, NULL)
3965 gfc_free_formal_arglist (head);
3970 /* Match a RESULT specification following a function declaration or
3971 ENTRY statement. Also matches the end-of-statement. */
3974 match_result (gfc_symbol *function, gfc_symbol **result)
3976 char name[GFC_MAX_SYMBOL_LEN + 1];
3980 if (gfc_match (" result (") != MATCH_YES)
3983 m = gfc_match_name (name);
3987 /* Get the right paren, and that's it because there could be the
3988 bind(c) attribute after the result clause. */
3989 if (gfc_match_char(')') != MATCH_YES)
3991 /* TODO: should report the missing right paren here. */
3995 if (strcmp (function->name, name) == 0)
3997 gfc_error ("RESULT variable at %C must be different than function name");
4001 if (gfc_get_symbol (name, NULL, &r))
4004 if (gfc_add_result (&r->attr, r->name, NULL) == FAILURE)
4013 /* Match a function suffix, which could be a combination of a result
4014 clause and BIND(C), either one, or neither. The draft does not
4015 require them to come in a specific order. */
4018 gfc_match_suffix (gfc_symbol *sym, gfc_symbol **result)
4020 match is_bind_c; /* Found bind(c). */
4021 match is_result; /* Found result clause. */
4022 match found_match; /* Status of whether we've found a good match. */
4023 char peek_char; /* Character we're going to peek at. */
4024 bool allow_binding_name;
4026 /* Initialize to having found nothing. */
4027 found_match = MATCH_NO;
4028 is_bind_c = MATCH_NO;
4029 is_result = MATCH_NO;
4031 /* Get the next char to narrow between result and bind(c). */
4032 gfc_gobble_whitespace ();
4033 peek_char = gfc_peek_ascii_char ();
4035 /* C binding names are not allowed for internal procedures. */
4036 if (gfc_current_state () == COMP_CONTAINS
4037 && sym->ns->proc_name->attr.flavor != FL_MODULE)
4038 allow_binding_name = false;
4040 allow_binding_name = true;
4045 /* Look for result clause. */
4046 is_result = match_result (sym, result);
4047 if (is_result == MATCH_YES)
4049 /* Now see if there is a bind(c) after it. */
4050 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
4051 /* We've found the result clause and possibly bind(c). */
4052 found_match = MATCH_YES;
4055 /* This should only be MATCH_ERROR. */
4056 found_match = is_result;
4059 /* Look for bind(c) first. */
4060 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
4061 if (is_bind_c == MATCH_YES)
4063 /* Now see if a result clause followed it. */
4064 is_result = match_result (sym, result);
4065 found_match = MATCH_YES;
4069 /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */
4070 found_match = MATCH_ERROR;
4074 gfc_error ("Unexpected junk after function declaration at %C");
4075 found_match = MATCH_ERROR;
4079 if (is_bind_c == MATCH_YES)
4081 /* Fortran 2008 draft allows BIND(C) for internal procedures. */
4082 if (gfc_current_state () == COMP_CONTAINS
4083 && sym->ns->proc_name->attr.flavor != FL_MODULE
4084 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute "
4085 "at %L may not be specified for an internal "
4086 "procedure", &gfc_current_locus)
4090 if (gfc_add_is_bind_c (&(sym->attr), sym->name, &gfc_current_locus, 1)
4099 /* Procedure pointer return value without RESULT statement:
4100 Add "hidden" result variable named "ppr@". */
4103 add_hidden_procptr_result (gfc_symbol *sym)
4107 if (gfc_notification_std (GFC_STD_F2003) == ERROR)
4110 /* First usage case: PROCEDURE and EXTERNAL statements. */
4111 case1 = gfc_current_state () == COMP_FUNCTION && gfc_current_block ()
4112 && strcmp (gfc_current_block ()->name, sym->name) == 0
4113 && sym->attr.external;
4114 /* Second usage case: INTERFACE statements. */
4115 case2 = gfc_current_state () == COMP_INTERFACE && gfc_state_stack->previous
4116 && gfc_state_stack->previous->state == COMP_FUNCTION
4117 && strcmp (gfc_state_stack->previous->sym->name, sym->name) == 0;
4123 gfc_get_sym_tree ("ppr@", gfc_current_ns, &stree, false);
4127 gfc_get_sym_tree ("ppr@", gfc_current_ns->parent, &stree, false);
4128 st2 = gfc_new_symtree (&gfc_current_ns->sym_root, "ppr@");
4129 st2->n.sym = stree->n.sym;
4131 sym->result = stree->n.sym;
4133 sym->result->attr.proc_pointer = sym->attr.proc_pointer;
4134 sym->result->attr.pointer = sym->attr.pointer;
4135 sym->result->attr.external = sym->attr.external;
4136 sym->result->attr.referenced = sym->attr.referenced;
4137 sym->result->ts = sym->ts;
4138 sym->attr.proc_pointer = 0;
4139 sym->attr.pointer = 0;
4140 sym->attr.external = 0;
4141 if (sym->result->attr.external && sym->result->attr.pointer)
4143 sym->result->attr.pointer = 0;
4144 sym->result->attr.proc_pointer = 1;
4147 return gfc_add_result (&sym->result->attr, sym->result->name, NULL);
4149 /* POINTER after PROCEDURE/EXTERNAL/INTERFACE statement. */
4150 else if (sym->attr.function && !sym->attr.external && sym->attr.pointer
4151 && sym->result && sym->result != sym && sym->result->attr.external
4152 && sym == gfc_current_ns->proc_name
4153 && sym == sym->result->ns->proc_name
4154 && strcmp ("ppr@", sym->result->name) == 0)
4156 sym->result->attr.proc_pointer = 1;
4157 sym->attr.pointer = 0;
4165 /* Match the interface for a PROCEDURE declaration,
4166 including brackets (R1212). */
4169 match_procedure_interface (gfc_symbol **proc_if)
4173 locus old_loc, entry_loc;
4174 gfc_namespace *old_ns = gfc_current_ns;
4175 char name[GFC_MAX_SYMBOL_LEN + 1];
4177 old_loc = entry_loc = gfc_current_locus;
4178 gfc_clear_ts (¤t_ts);
4180 if (gfc_match (" (") != MATCH_YES)
4182 gfc_current_locus = entry_loc;
4186 /* Get the type spec. for the procedure interface. */
4187 old_loc = gfc_current_locus;
4188 m = gfc_match_decl_type_spec (¤t_ts, 0);
4189 gfc_gobble_whitespace ();
4190 if (m == MATCH_YES || (m == MATCH_NO && gfc_peek_ascii_char () == ')'))
4193 if (m == MATCH_ERROR)
4196 /* Procedure interface is itself a procedure. */
4197 gfc_current_locus = old_loc;
4198 m = gfc_match_name (name);
4200 /* First look to see if it is already accessible in the current
4201 namespace because it is use associated or contained. */
4203 if (gfc_find_sym_tree (name, NULL, 0, &st))
4206 /* If it is still not found, then try the parent namespace, if it
4207 exists and create the symbol there if it is still not found. */
4208 if (gfc_current_ns->parent)
4209 gfc_current_ns = gfc_current_ns->parent;
4210 if (st == NULL && gfc_get_ha_sym_tree (name, &st))
4213 gfc_current_ns = old_ns;
4214 *proc_if = st->n.sym;
4216 /* Various interface checks. */
4220 /* Resolve interface if possible. That way, attr.procedure is only set
4221 if it is declared by a later procedure-declaration-stmt, which is
4222 invalid per C1212. */
4223 while ((*proc_if)->ts.interface)
4224 *proc_if = (*proc_if)->ts.interface;
4226 if ((*proc_if)->generic)
4228 gfc_error ("Interface '%s' at %C may not be generic",
4232 if ((*proc_if)->attr.proc == PROC_ST_FUNCTION)
4234 gfc_error ("Interface '%s' at %C may not be a statement function",
4238 /* Handle intrinsic procedures. */
4239 if (!((*proc_if)->attr.external || (*proc_if)->attr.use_assoc
4240 || (*proc_if)->attr.if_source == IFSRC_IFBODY)
4241 && (gfc_is_intrinsic ((*proc_if), 0, gfc_current_locus)
4242 || gfc_is_intrinsic ((*proc_if), 1, gfc_current_locus)))
4243 (*proc_if)->attr.intrinsic = 1;
4244 if ((*proc_if)->attr.intrinsic
4245 && !gfc_intrinsic_actual_ok ((*proc_if)->name, 0))
4247 gfc_error ("Intrinsic procedure '%s' not allowed "
4248 "in PROCEDURE statement at %C", (*proc_if)->name);
4254 if (gfc_match (" )") != MATCH_YES)
4256 gfc_current_locus = entry_loc;
4264 /* Match a PROCEDURE declaration (R1211). */
4267 match_procedure_decl (void)
4270 gfc_symbol *sym, *proc_if = NULL;
4272 gfc_expr *initializer = NULL;
4274 /* Parse interface (with brackets). */
4275 m = match_procedure_interface (&proc_if);
4279 /* Parse attributes (with colons). */
4280 m = match_attr_spec();
4281 if (m == MATCH_ERROR)
4284 /* Get procedure symbols. */
4287 m = gfc_match_symbol (&sym, 0);
4290 else if (m == MATCH_ERROR)
4293 /* Add current_attr to the symbol attributes. */
4294 if (gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE)
4297 if (sym->attr.is_bind_c)
4299 /* Check for C1218. */
4300 if (!proc_if || !proc_if->attr.is_bind_c)
4302 gfc_error ("BIND(C) attribute at %C requires "
4303 "an interface with BIND(C)");
4306 /* Check for C1217. */
4307 if (has_name_equals && sym->attr.pointer)
4309 gfc_error ("BIND(C) procedure with NAME may not have "
4310 "POINTER attribute at %C");
4313 if (has_name_equals && sym->attr.dummy)
4315 gfc_error ("Dummy procedure at %C may not have "
4316 "BIND(C) attribute with NAME");
4319 /* Set binding label for BIND(C). */
4320 if (set_binding_label (sym->binding_label, sym->name, num) != SUCCESS)
4324 if (gfc_add_external (&sym->attr, NULL) == FAILURE)
4327 if (add_hidden_procptr_result (sym) == SUCCESS)
4330 if (gfc_add_proc (&sym->attr, sym->name, NULL) == FAILURE)
4333 /* Set interface. */
4334 if (proc_if != NULL)
4336 if (sym->ts.type != BT_UNKNOWN)
4338 gfc_error ("Procedure '%s' at %L already has basic type of %s",
4339 sym->name, &gfc_current_locus,
4340 gfc_basic_typename (sym->ts.type));
4343 sym->ts.interface = proc_if;
4344 sym->attr.untyped = 1;
4345 sym->attr.if_source = IFSRC_IFBODY;
4347 else if (current_ts.type != BT_UNKNOWN)
4349 if (gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE)
4351 sym->ts.interface = gfc_new_symbol ("", gfc_current_ns);
4352 sym->ts.interface->ts = current_ts;
4353 sym->ts.interface->attr.function = 1;
4354 sym->attr.function = sym->ts.interface->attr.function;
4355 sym->attr.if_source = IFSRC_UNKNOWN;
4358 if (gfc_match (" =>") == MATCH_YES)
4360 if (!current_attr.pointer)
4362 gfc_error ("Initialization at %C isn't for a pointer variable");
4367 m = gfc_match_null (&initializer);
4370 gfc_error ("Pointer initialization requires a NULL() at %C");
4374 if (gfc_pure (NULL))
4376 gfc_error ("Initialization of pointer at %C is not allowed in "
4377 "a PURE procedure");
4384 if (add_init_expr_to_sym (sym->name, &initializer, &gfc_current_locus)
4390 gfc_set_sym_referenced (sym);
4392 if (gfc_match_eos () == MATCH_YES)
4394 if (gfc_match_char (',') != MATCH_YES)
4399 gfc_error ("Syntax error in PROCEDURE statement at %C");
4403 /* Free stuff up and return. */
4404 gfc_free_expr (initializer);
4410 match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc);
4413 /* Match a procedure pointer component declaration (R445). */
4416 match_ppc_decl (void)
4419 gfc_symbol *proc_if = NULL;
4423 gfc_expr *initializer = NULL;
4424 gfc_typebound_proc* tb;
4425 char name[GFC_MAX_SYMBOL_LEN + 1];
4427 /* Parse interface (with brackets). */
4428 m = match_procedure_interface (&proc_if);
4432 /* Parse attributes. */
4433 tb = XCNEW (gfc_typebound_proc);
4434 tb->where = gfc_current_locus;
4435 m = match_binding_attributes (tb, false, true);
4436 if (m == MATCH_ERROR)
4439 gfc_clear_attr (¤t_attr);
4440 current_attr.procedure = 1;
4441 current_attr.proc_pointer = 1;
4442 current_attr.access = tb->access;
4443 current_attr.flavor = FL_PROCEDURE;
4445 /* Match the colons (required). */
4446 if (gfc_match (" ::") != MATCH_YES)
4448 gfc_error ("Expected '::' after binding-attributes at %C");
4452 /* Check for C450. */
4453 if (!tb->nopass && proc_if == NULL)
4455 gfc_error("NOPASS or explicit interface required at %C");
4459 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Procedure pointer "
4460 "component at %C") == FAILURE)
4463 /* Match PPC names. */
4467 m = gfc_match_name (name);
4470 else if (m == MATCH_ERROR)
4473 if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE)
4476 /* Add current_attr to the symbol attributes. */
4477 if (gfc_copy_attr (&c->attr, ¤t_attr, NULL) == FAILURE)
4480 if (gfc_add_external (&c->attr, NULL) == FAILURE)
4483 if (gfc_add_proc (&c->attr, name, NULL) == FAILURE)
4488 /* Set interface. */
4489 if (proc_if != NULL)
4491 c->ts.interface = proc_if;
4492 c->attr.untyped = 1;
4493 c->attr.if_source = IFSRC_IFBODY;
4495 else if (ts.type != BT_UNKNOWN)
4498 c->ts.interface = gfc_new_symbol ("", gfc_current_ns);
4499 c->ts.interface->ts = ts;
4500 c->ts.interface->attr.function = 1;
4501 c->attr.function = c->ts.interface->attr.function;
4502 c->attr.if_source = IFSRC_UNKNOWN;
4505 if (gfc_match (" =>") == MATCH_YES)
4507 m = gfc_match_null (&initializer);
4510 gfc_error ("Pointer initialization requires a NULL() at %C");
4513 if (gfc_pure (NULL))
4515 gfc_error ("Initialization of pointer at %C is not allowed in "
4516 "a PURE procedure");
4521 gfc_free_expr (initializer);
4524 c->initializer = initializer;
4527 if (gfc_match_eos () == MATCH_YES)
4529 if (gfc_match_char (',') != MATCH_YES)
4534 gfc_error ("Syntax error in procedure pointer component at %C");
4539 /* Match a PROCEDURE declaration inside an interface (R1206). */
4542 match_procedure_in_interface (void)
4546 char name[GFC_MAX_SYMBOL_LEN + 1];
4548 if (current_interface.type == INTERFACE_NAMELESS
4549 || current_interface.type == INTERFACE_ABSTRACT)
4551 gfc_error ("PROCEDURE at %C must be in a generic interface");
4557 m = gfc_match_name (name);
4560 else if (m == MATCH_ERROR)
4562 if (gfc_get_symbol (name, gfc_current_ns->parent, &sym))
4565 if (gfc_add_interface (sym) == FAILURE)
4568 if (gfc_match_eos () == MATCH_YES)
4570 if (gfc_match_char (',') != MATCH_YES)
4577 gfc_error ("Syntax error in PROCEDURE statement at %C");
4582 /* General matcher for PROCEDURE declarations. */
4584 static match match_procedure_in_type (void);
4587 gfc_match_procedure (void)
4591 switch (gfc_current_state ())
4596 case COMP_SUBROUTINE:
4598 m = match_procedure_decl ();
4600 case COMP_INTERFACE:
4601 m = match_procedure_in_interface ();
4604 m = match_ppc_decl ();
4606 case COMP_DERIVED_CONTAINS:
4607 m = match_procedure_in_type ();
4616 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROCEDURE statement at %C")
4624 /* Warn if a matched procedure has the same name as an intrinsic; this is
4625 simply a wrapper around gfc_warn_intrinsic_shadow that interprets the current
4626 parser-state-stack to find out whether we're in a module. */
4629 warn_intrinsic_shadow (const gfc_symbol* sym, bool func)
4633 in_module = (gfc_state_stack->previous
4634 && gfc_state_stack->previous->state == COMP_MODULE);
4636 gfc_warn_intrinsic_shadow (sym, in_module, func);
4640 /* Match a function declaration. */
4643 gfc_match_function_decl (void)
4645 char name[GFC_MAX_SYMBOL_LEN + 1];
4646 gfc_symbol *sym, *result;
4650 match found_match; /* Status returned by match func. */
4652 if (gfc_current_state () != COMP_NONE
4653 && gfc_current_state () != COMP_INTERFACE
4654 && gfc_current_state () != COMP_CONTAINS)
4657 gfc_clear_ts (¤t_ts);
4659 old_loc = gfc_current_locus;
4661 m = gfc_match_prefix (¤t_ts);
4664 gfc_current_locus = old_loc;
4668 if (gfc_match ("function% %n", name) != MATCH_YES)
4670 gfc_current_locus = old_loc;
4673 if (get_proc_name (name, &sym, false))
4676 if (add_hidden_procptr_result (sym) == SUCCESS)
4679 gfc_new_block = sym;
4681 m = gfc_match_formal_arglist (sym, 0, 0);
4684 gfc_error ("Expected formal argument list in function "
4685 "definition at %C");
4689 else if (m == MATCH_ERROR)
4694 /* According to the draft, the bind(c) and result clause can
4695 come in either order after the formal_arg_list (i.e., either
4696 can be first, both can exist together or by themselves or neither
4697 one). Therefore, the match_result can't match the end of the
4698 string, and check for the bind(c) or result clause in either order. */
4699 found_match = gfc_match_eos ();
4701 /* Make sure that it isn't already declared as BIND(C). If it is, it
4702 must have been marked BIND(C) with a BIND(C) attribute and that is
4703 not allowed for procedures. */
4704 if (sym->attr.is_bind_c == 1)
4706 sym->attr.is_bind_c = 0;
4707 if (sym->old_symbol != NULL)
4708 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4709 "variables or common blocks",
4710 &(sym->old_symbol->declared_at));
4712 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4713 "variables or common blocks", &gfc_current_locus);
4716 if (found_match != MATCH_YES)
4718 /* If we haven't found the end-of-statement, look for a suffix. */
4719 suffix_match = gfc_match_suffix (sym, &result);
4720 if (suffix_match == MATCH_YES)
4721 /* Need to get the eos now. */
4722 found_match = gfc_match_eos ();
4724 found_match = suffix_match;
4727 if(found_match != MATCH_YES)
4731 /* Make changes to the symbol. */
4734 if (gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE)
4737 if (gfc_missing_attr (&sym->attr, NULL) == FAILURE
4738 || copy_prefix (&sym->attr, &sym->declared_at) == FAILURE)
4741 /* Delay matching the function characteristics until after the
4742 specification block by signalling kind=-1. */
4743 sym->declared_at = old_loc;
4744 if (current_ts.type != BT_UNKNOWN)
4745 current_ts.kind = -1;
4747 current_ts.kind = 0;
4751 if (current_ts.type != BT_UNKNOWN
4752 && gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE)
4758 if (current_ts.type != BT_UNKNOWN
4759 && gfc_add_type (result, ¤t_ts, &gfc_current_locus)
4762 sym->result = result;
4765 /* Warn if this procedure has the same name as an intrinsic. */
4766 warn_intrinsic_shadow (sym, true);
4772 gfc_current_locus = old_loc;
4777 /* This is mostly a copy of parse.c(add_global_procedure) but modified to
4778 pass the name of the entry, rather than the gfc_current_block name, and
4779 to return false upon finding an existing global entry. */
4782 add_global_entry (const char *name, int sub)
4785 enum gfc_symbol_type type;
4787 s = gfc_get_gsymbol(name);
4788 type = sub ? GSYM_SUBROUTINE : GSYM_FUNCTION;
4791 || (s->type != GSYM_UNKNOWN
4792 && s->type != type))
4793 gfc_global_used(s, NULL);
4797 s->where = gfc_current_locus;
4799 s->ns = gfc_current_ns;
4806 /* Match an ENTRY statement. */
4809 gfc_match_entry (void)
4814 char name[GFC_MAX_SYMBOL_LEN + 1];
4815 gfc_compile_state state;
4819 bool module_procedure;
4823 m = gfc_match_name (name);
4827 state = gfc_current_state ();
4828 if (state != COMP_SUBROUTINE && state != COMP_FUNCTION)
4833 gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM");
4836 gfc_error ("ENTRY statement at %C cannot appear within a MODULE");
4838 case COMP_BLOCK_DATA:
4839 gfc_error ("ENTRY statement at %C cannot appear within "
4842 case COMP_INTERFACE:
4843 gfc_error ("ENTRY statement at %C cannot appear within "
4847 gfc_error ("ENTRY statement at %C cannot appear within "
4848 "a DERIVED TYPE block");
4851 gfc_error ("ENTRY statement at %C cannot appear within "
4852 "an IF-THEN block");
4855 gfc_error ("ENTRY statement at %C cannot appear within "
4859 gfc_error ("ENTRY statement at %C cannot appear within "
4863 gfc_error ("ENTRY statement at %C cannot appear within "
4867 gfc_error ("ENTRY statement at %C cannot appear within "
4871 gfc_error ("ENTRY statement at %C cannot appear within "
4872 "a contained subprogram");
4875 gfc_internal_error ("gfc_match_entry(): Bad state");
4880 module_procedure = gfc_current_ns->parent != NULL
4881 && gfc_current_ns->parent->proc_name
4882 && gfc_current_ns->parent->proc_name->attr.flavor
4885 if (gfc_current_ns->parent != NULL
4886 && gfc_current_ns->parent->proc_name
4887 && !module_procedure)
4889 gfc_error("ENTRY statement at %C cannot appear in a "
4890 "contained procedure");
4894 /* Module function entries need special care in get_proc_name
4895 because previous references within the function will have
4896 created symbols attached to the current namespace. */
4897 if (get_proc_name (name, &entry,
4898 gfc_current_ns->parent != NULL
4899 && module_procedure))
4902 proc = gfc_current_block ();
4904 /* Make sure that it isn't already declared as BIND(C). If it is, it
4905 must have been marked BIND(C) with a BIND(C) attribute and that is
4906 not allowed for procedures. */
4907 if (entry->attr.is_bind_c == 1)
4909 entry->attr.is_bind_c = 0;
4910 if (entry->old_symbol != NULL)
4911 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4912 "variables or common blocks",
4913 &(entry->old_symbol->declared_at));
4915 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4916 "variables or common blocks", &gfc_current_locus);
4919 /* Check what next non-whitespace character is so we can tell if there
4920 is the required parens if we have a BIND(C). */
4921 gfc_gobble_whitespace ();
4922 peek_char = gfc_peek_ascii_char ();
4924 if (state == COMP_SUBROUTINE)
4926 /* An entry in a subroutine. */
4927 if (!gfc_current_ns->parent && !add_global_entry (name, 1))
4930 m = gfc_match_formal_arglist (entry, 0, 1);
4934 /* Call gfc_match_bind_c with allow_binding_name = true as ENTRY can
4935 never be an internal procedure. */
4936 is_bind_c = gfc_match_bind_c (entry, true);
4937 if (is_bind_c == MATCH_ERROR)
4939 if (is_bind_c == MATCH_YES)
4941 if (peek_char != '(')
4943 gfc_error ("Missing required parentheses before BIND(C) at %C");
4946 if (gfc_add_is_bind_c (&(entry->attr), entry->name, &(entry->declared_at), 1)
4951 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
4952 || gfc_add_subroutine (&entry->attr, entry->name, NULL) == FAILURE)
4957 /* An entry in a function.
4958 We need to take special care because writing
4963 ENTRY f() RESULT (r)
4965 ENTRY f RESULT (r). */
4966 if (!gfc_current_ns->parent && !add_global_entry (name, 0))
4969 old_loc = gfc_current_locus;
4970 if (gfc_match_eos () == MATCH_YES)
4972 gfc_current_locus = old_loc;
4973 /* Match the empty argument list, and add the interface to
4975 m = gfc_match_formal_arglist (entry, 0, 1);
4978 m = gfc_match_formal_arglist (entry, 0, 0);
4985 if (gfc_match_eos () == MATCH_YES)
4987 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
4988 || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE)
4991 entry->result = entry;
4995 m = gfc_match_suffix (entry, &result);
4997 gfc_syntax_error (ST_ENTRY);
5003 if (gfc_add_result (&result->attr, result->name, NULL) == FAILURE
5004 || gfc_add_entry (&entry->attr, result->name, NULL) == FAILURE
5005 || gfc_add_function (&entry->attr, result->name, NULL)
5008 entry->result = result;
5012 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
5013 || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE)
5015 entry->result = entry;
5020 if (gfc_match_eos () != MATCH_YES)
5022 gfc_syntax_error (ST_ENTRY);
5026 entry->attr.recursive = proc->attr.recursive;
5027 entry->attr.elemental = proc->attr.elemental;
5028 entry->attr.pure = proc->attr.pure;
5030 el = gfc_get_entry_list ();
5032 el->next = gfc_current_ns->entries;
5033 gfc_current_ns->entries = el;
5035 el->id = el->next->id + 1;
5039 new_st.op = EXEC_ENTRY;
5040 new_st.ext.entry = el;
5046 /* Match a subroutine statement, including optional prefixes. */
5049 gfc_match_subroutine (void)
5051 char name[GFC_MAX_SYMBOL_LEN + 1];
5056 bool allow_binding_name;
5058 if (gfc_current_state () != COMP_NONE
5059 && gfc_current_state () != COMP_INTERFACE
5060 && gfc_current_state () != COMP_CONTAINS)
5063 m = gfc_match_prefix (NULL);
5067 m = gfc_match ("subroutine% %n", name);
5071 if (get_proc_name (name, &sym, false))
5074 if (add_hidden_procptr_result (sym) == SUCCESS)
5077 gfc_new_block = sym;
5079 /* Check what next non-whitespace character is so we can tell if there
5080 is the required parens if we have a BIND(C). */
5081 gfc_gobble_whitespace ();
5082 peek_char = gfc_peek_ascii_char ();
5084 if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE)
5087 if (gfc_match_formal_arglist (sym, 0, 1) != MATCH_YES)
5090 /* Make sure that it isn't already declared as BIND(C). If it is, it
5091 must have been marked BIND(C) with a BIND(C) attribute and that is
5092 not allowed for procedures. */
5093 if (sym->attr.is_bind_c == 1)
5095 sym->attr.is_bind_c = 0;
5096 if (sym->old_symbol != NULL)
5097 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5098 "variables or common blocks",
5099 &(sym->old_symbol->declared_at));
5101 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5102 "variables or common blocks", &gfc_current_locus);
5105 /* C binding names are not allowed for internal procedures. */
5106 if (gfc_current_state () == COMP_CONTAINS
5107 && sym->ns->proc_name->attr.flavor != FL_MODULE)
5108 allow_binding_name = false;
5110 allow_binding_name = true;
5112 /* Here, we are just checking if it has the bind(c) attribute, and if
5113 so, then we need to make sure it's all correct. If it doesn't,
5114 we still need to continue matching the rest of the subroutine line. */
5115 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
5116 if (is_bind_c == MATCH_ERROR)
5118 /* There was an attempt at the bind(c), but it was wrong. An
5119 error message should have been printed w/in the gfc_match_bind_c
5120 so here we'll just return the MATCH_ERROR. */
5124 if (is_bind_c == MATCH_YES)
5126 /* The following is allowed in the Fortran 2008 draft. */
5127 if (gfc_current_state () == COMP_CONTAINS
5128 && sym->ns->proc_name->attr.flavor != FL_MODULE
5129 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute "
5130 "at %L may not be specified for an internal "
5131 "procedure", &gfc_current_locus)
5135 if (peek_char != '(')
5137 gfc_error ("Missing required parentheses before BIND(C) at %C");
5140 if (gfc_add_is_bind_c (&(sym->attr), sym->name, &(sym->declared_at), 1)
5145 if (gfc_match_eos () != MATCH_YES)
5147 gfc_syntax_error (ST_SUBROUTINE);
5151 if (copy_prefix (&sym->attr, &sym->declared_at) == FAILURE)
5154 /* Warn if it has the same name as an intrinsic. */
5155 warn_intrinsic_shadow (sym, false);
5161 /* Match a BIND(C) specifier, with the optional 'name=' specifier if
5162 given, and set the binding label in either the given symbol (if not
5163 NULL), or in the current_ts. The symbol may be NULL because we may
5164 encounter the BIND(C) before the declaration itself. Return
5165 MATCH_NO if what we're looking at isn't a BIND(C) specifier,
5166 MATCH_ERROR if it is a BIND(C) clause but an error was encountered,
5167 or MATCH_YES if the specifier was correct and the binding label and
5168 bind(c) fields were set correctly for the given symbol or the
5169 current_ts. If allow_binding_name is false, no binding name may be
5173 gfc_match_bind_c (gfc_symbol *sym, bool allow_binding_name)
5175 /* binding label, if exists */
5176 char binding_label[GFC_MAX_SYMBOL_LEN + 1];
5180 /* Initialize the flag that specifies whether we encountered a NAME=
5181 specifier or not. */
5182 has_name_equals = 0;
5184 /* Init the first char to nil so we can catch if we don't have
5185 the label (name attr) or the symbol name yet. */
5186 binding_label[0] = '\0';
5188 /* This much we have to be able to match, in this order, if
5189 there is a bind(c) label. */
5190 if (gfc_match (" bind ( c ") != MATCH_YES)
5193 /* Now see if there is a binding label, or if we've reached the
5194 end of the bind(c) attribute without one. */
5195 if (gfc_match_char (',') == MATCH_YES)
5197 if (gfc_match (" name = ") != MATCH_YES)
5199 gfc_error ("Syntax error in NAME= specifier for binding label "
5201 /* should give an error message here */
5205 has_name_equals = 1;
5207 /* Get the opening quote. */
5208 double_quote = MATCH_YES;
5209 single_quote = MATCH_YES;
5210 double_quote = gfc_match_char ('"');
5211 if (double_quote != MATCH_YES)
5212 single_quote = gfc_match_char ('\'');
5213 if (double_quote != MATCH_YES && single_quote != MATCH_YES)
5215 gfc_error ("Syntax error in NAME= specifier for binding label "
5220 /* Grab the binding label, using functions that will not lower
5221 case the names automatically. */
5222 if (gfc_match_name_C (binding_label) != MATCH_YES)
5225 /* Get the closing quotation. */
5226 if (double_quote == MATCH_YES)
5228 if (gfc_match_char ('"') != MATCH_YES)
5230 gfc_error ("Missing closing quote '\"' for binding label at %C");
5231 /* User started string with '"' so looked to match it. */
5237 if (gfc_match_char ('\'') != MATCH_YES)
5239 gfc_error ("Missing closing quote '\'' for binding label at %C");
5240 /* User started string with "'" char. */
5246 /* Get the required right paren. */
5247 if (gfc_match_char (')') != MATCH_YES)
5249 gfc_error ("Missing closing paren for binding label at %C");
5253 if (has_name_equals && !allow_binding_name)
5255 gfc_error ("No binding name is allowed in BIND(C) at %C");
5259 if (has_name_equals && sym != NULL && sym->attr.dummy)
5261 gfc_error ("For dummy procedure %s, no binding name is "
5262 "allowed in BIND(C) at %C", sym->name);
5267 /* Save the binding label to the symbol. If sym is null, we're
5268 probably matching the typespec attributes of a declaration and
5269 haven't gotten the name yet, and therefore, no symbol yet. */
5270 if (binding_label[0] != '\0')
5274 strcpy (sym->binding_label, binding_label);
5277 strcpy (curr_binding_label, binding_label);
5279 else if (allow_binding_name)
5281 /* No binding label, but if symbol isn't null, we
5282 can set the label for it here.
5283 If name="" or allow_binding_name is false, no C binding name is
5285 if (sym != NULL && sym->name != NULL && has_name_equals == 0)
5286 strncpy (sym->binding_label, sym->name, strlen (sym->name) + 1);
5289 if (has_name_equals && gfc_current_state () == COMP_INTERFACE
5290 && current_interface.type == INTERFACE_ABSTRACT)
5292 gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C");
5300 /* Return nonzero if we're currently compiling a contained procedure. */
5303 contained_procedure (void)
5305 gfc_state_data *s = gfc_state_stack;
5307 if ((s->state == COMP_SUBROUTINE || s->state == COMP_FUNCTION)
5308 && s->previous != NULL && s->previous->state == COMP_CONTAINS)
5314 /* Set the kind of each enumerator. The kind is selected such that it is
5315 interoperable with the corresponding C enumeration type, making
5316 sure that -fshort-enums is honored. */
5321 enumerator_history *current_history = NULL;
5325 if (max_enum == NULL || enum_history == NULL)
5328 if (!flag_short_enums)
5334 kind = gfc_integer_kinds[i++].kind;
5336 while (kind < gfc_c_int_kind
5337 && gfc_check_integer_range (max_enum->initializer->value.integer,
5340 current_history = enum_history;
5341 while (current_history != NULL)
5343 current_history->sym->ts.kind = kind;
5344 current_history = current_history->next;
5349 /* Match any of the various end-block statements. Returns the type of
5350 END to the caller. The END INTERFACE, END IF, END DO, END SELECT
5351 and END BLOCK statements cannot be replaced by a single END statement. */
5354 gfc_match_end (gfc_statement *st)
5356 char name[GFC_MAX_SYMBOL_LEN + 1];
5357 gfc_compile_state state;
5359 const char *block_name;
5364 old_loc = gfc_current_locus;
5365 if (gfc_match ("end") != MATCH_YES)
5368 state = gfc_current_state ();
5369 block_name = gfc_current_block () == NULL
5370 ? NULL : gfc_current_block ()->name;
5372 if (state == COMP_BLOCK && !strcmp (block_name, "block@"))
5375 if (state == COMP_CONTAINS || state == COMP_DERIVED_CONTAINS)
5377 state = gfc_state_stack->previous->state;
5378 block_name = gfc_state_stack->previous->sym == NULL
5379 ? NULL : gfc_state_stack->previous->sym->name;
5386 *st = ST_END_PROGRAM;
5387 target = " program";
5391 case COMP_SUBROUTINE:
5392 *st = ST_END_SUBROUTINE;
5393 target = " subroutine";
5394 eos_ok = !contained_procedure ();
5398 *st = ST_END_FUNCTION;
5399 target = " function";
5400 eos_ok = !contained_procedure ();
5403 case COMP_BLOCK_DATA:
5404 *st = ST_END_BLOCK_DATA;
5405 target = " block data";
5410 *st = ST_END_MODULE;
5415 case COMP_INTERFACE:
5416 *st = ST_END_INTERFACE;
5417 target = " interface";
5422 case COMP_DERIVED_CONTAINS:
5447 case COMP_SELECT_TYPE:
5448 *st = ST_END_SELECT;
5454 *st = ST_END_FORALL;
5469 last_initializer = NULL;
5471 gfc_free_enum_history ();
5475 gfc_error ("Unexpected END statement at %C");
5479 if (gfc_match_eos () == MATCH_YES)
5483 /* We would have required END [something]. */
5484 gfc_error ("%s statement expected at %L",
5485 gfc_ascii_statement (*st), &old_loc);
5492 /* Verify that we've got the sort of end-block that we're expecting. */
5493 if (gfc_match (target) != MATCH_YES)
5495 gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st));
5499 /* If we're at the end, make sure a block name wasn't required. */
5500 if (gfc_match_eos () == MATCH_YES)
5503 if (*st != ST_ENDDO && *st != ST_ENDIF && *st != ST_END_SELECT
5504 && *st != ST_END_FORALL && *st != ST_END_WHERE && *st != ST_END_BLOCK)
5510 gfc_error ("Expected block name of '%s' in %s statement at %C",
5511 block_name, gfc_ascii_statement (*st));
5516 /* END INTERFACE has a special handler for its several possible endings. */
5517 if (*st == ST_END_INTERFACE)
5518 return gfc_match_end_interface ();
5520 /* We haven't hit the end of statement, so what is left must be an
5522 m = gfc_match_space ();
5524 m = gfc_match_name (name);
5527 gfc_error ("Expected terminating name at %C");
5531 if (block_name == NULL)
5534 if (strcmp (name, block_name) != 0 && strcmp (block_name, "ppr@") != 0)
5536 gfc_error ("Expected label '%s' for %s statement at %C", block_name,
5537 gfc_ascii_statement (*st));
5540 /* Procedure pointer as function result. */
5541 else if (strcmp (block_name, "ppr@") == 0
5542 && strcmp (name, gfc_current_block ()->ns->proc_name->name) != 0)
5544 gfc_error ("Expected label '%s' for %s statement at %C",
5545 gfc_current_block ()->ns->proc_name->name,
5546 gfc_ascii_statement (*st));
5550 if (gfc_match_eos () == MATCH_YES)
5554 gfc_syntax_error (*st);
5557 gfc_current_locus = old_loc;
5563 /***************** Attribute declaration statements ****************/
5565 /* Set the attribute of a single variable. */
5570 char name[GFC_MAX_SYMBOL_LEN + 1];
5578 m = gfc_match_name (name);
5582 if (find_special (name, &sym, false))
5585 var_locus = gfc_current_locus;
5587 /* Deal with possible array specification for certain attributes. */
5588 if (current_attr.dimension
5589 || current_attr.allocatable
5590 || current_attr.pointer
5591 || current_attr.target)
5593 m = gfc_match_array_spec (&as);
5594 if (m == MATCH_ERROR)
5597 if (current_attr.dimension && m == MATCH_NO)
5599 gfc_error ("Missing array specification at %L in DIMENSION "
5600 "statement", &var_locus);
5605 if (current_attr.dimension && sym->value)
5607 gfc_error ("Dimensions specified for %s at %L after its "
5608 "initialisation", sym->name, &var_locus);
5613 if ((current_attr.allocatable || current_attr.pointer)
5614 && (m == MATCH_YES) && (as->type != AS_DEFERRED))
5616 gfc_error ("Array specification must be deferred at %L", &var_locus);
5622 /* Update symbol table. DIMENSION attribute is set in
5623 gfc_set_array_spec(). For CLASS variables, this must be applied
5624 to the first component, or '$data' field. */
5625 if (sym->ts.type == BT_CLASS && sym->ts.u.derived)
5627 gfc_component *comp;
5628 comp = gfc_find_component (sym->ts.u.derived, "$data", true, true);
5629 if (comp == NULL || gfc_copy_attr (&comp->attr, ¤t_attr,
5630 &var_locus) == FAILURE)
5635 sym->attr.class_ok = (sym->attr.class_ok
5636 || current_attr.allocatable
5637 || current_attr.pointer);
5641 if (current_attr.dimension == 0
5642 && gfc_copy_attr (&sym->attr, ¤t_attr, &var_locus) == FAILURE)
5649 if (gfc_set_array_spec (sym, as, &var_locus) == FAILURE)
5655 if (sym->attr.cray_pointee && sym->as != NULL)
5657 /* Fix the array spec. */
5658 m = gfc_mod_pointee_as (sym->as);
5659 if (m == MATCH_ERROR)
5663 if (gfc_add_attribute (&sym->attr, &var_locus) == FAILURE)
5669 if ((current_attr.external || current_attr.intrinsic)
5670 && sym->attr.flavor != FL_PROCEDURE
5671 && gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL) == FAILURE)
5677 add_hidden_procptr_result (sym);
5682 gfc_free_array_spec (as);
5687 /* Generic attribute declaration subroutine. Used for attributes that
5688 just have a list of names. */
5695 /* Gobble the optional double colon, by simply ignoring the result
5705 if (gfc_match_eos () == MATCH_YES)
5711 if (gfc_match_char (',') != MATCH_YES)
5713 gfc_error ("Unexpected character in variable list at %C");
5723 /* This routine matches Cray Pointer declarations of the form:
5724 pointer ( <pointer>, <pointee> )
5726 pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ...
5727 The pointer, if already declared, should be an integer. Otherwise, we
5728 set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may
5729 be either a scalar, or an array declaration. No space is allocated for
5730 the pointee. For the statement
5731 pointer (ipt, ar(10))
5732 any subsequent uses of ar will be translated (in C-notation) as
5733 ar(i) => ((<type> *) ipt)(i)
5734 After gimplification, pointee variable will disappear in the code. */
5737 cray_pointer_decl (void)
5741 gfc_symbol *cptr; /* Pointer symbol. */
5742 gfc_symbol *cpte; /* Pointee symbol. */
5748 if (gfc_match_char ('(') != MATCH_YES)
5750 gfc_error ("Expected '(' at %C");
5754 /* Match pointer. */
5755 var_locus = gfc_current_locus;
5756 gfc_clear_attr (¤t_attr);
5757 gfc_add_cray_pointer (¤t_attr, &var_locus);
5758 current_ts.type = BT_INTEGER;
5759 current_ts.kind = gfc_index_integer_kind;
5761 m = gfc_match_symbol (&cptr, 0);
5764 gfc_error ("Expected variable name at %C");
5768 if (gfc_add_cray_pointer (&cptr->attr, &var_locus) == FAILURE)
5771 gfc_set_sym_referenced (cptr);
5773 if (cptr->ts.type == BT_UNKNOWN) /* Override the type, if necessary. */
5775 cptr->ts.type = BT_INTEGER;
5776 cptr->ts.kind = gfc_index_integer_kind;
5778 else if (cptr->ts.type != BT_INTEGER)
5780 gfc_error ("Cray pointer at %C must be an integer");
5783 else if (cptr->ts.kind < gfc_index_integer_kind)
5784 gfc_warning ("Cray pointer at %C has %d bytes of precision;"
5785 " memory addresses require %d bytes",
5786 cptr->ts.kind, gfc_index_integer_kind);
5788 if (gfc_match_char (',') != MATCH_YES)
5790 gfc_error ("Expected \",\" at %C");
5794 /* Match Pointee. */
5795 var_locus = gfc_current_locus;
5796 gfc_clear_attr (¤t_attr);
5797 gfc_add_cray_pointee (¤t_attr, &var_locus);
5798 current_ts.type = BT_UNKNOWN;
5799 current_ts.kind = 0;
5801 m = gfc_match_symbol (&cpte, 0);
5804 gfc_error ("Expected variable name at %C");
5808 /* Check for an optional array spec. */
5809 m = gfc_match_array_spec (&as);
5810 if (m == MATCH_ERROR)
5812 gfc_free_array_spec (as);
5815 else if (m == MATCH_NO)
5817 gfc_free_array_spec (as);
5821 if (gfc_add_cray_pointee (&cpte->attr, &var_locus) == FAILURE)
5824 gfc_set_sym_referenced (cpte);
5826 if (cpte->as == NULL)
5828 if (gfc_set_array_spec (cpte, as, &var_locus) == FAILURE)
5829 gfc_internal_error ("Couldn't set Cray pointee array spec.");
5831 else if (as != NULL)
5833 gfc_error ("Duplicate array spec for Cray pointee at %C");
5834 gfc_free_array_spec (as);
5840 if (cpte->as != NULL)
5842 /* Fix array spec. */
5843 m = gfc_mod_pointee_as (cpte->as);
5844 if (m == MATCH_ERROR)
5848 /* Point the Pointee at the Pointer. */
5849 cpte->cp_pointer = cptr;
5851 if (gfc_match_char (')') != MATCH_YES)
5853 gfc_error ("Expected \")\" at %C");
5856 m = gfc_match_char (',');
5858 done = true; /* Stop searching for more declarations. */
5862 if (m == MATCH_ERROR /* Failed when trying to find ',' above. */
5863 || gfc_match_eos () != MATCH_YES)
5865 gfc_error ("Expected \",\" or end of statement at %C");
5873 gfc_match_external (void)
5876 gfc_clear_attr (¤t_attr);
5877 current_attr.external = 1;
5879 return attr_decl ();
5884 gfc_match_intent (void)
5888 /* This is not allowed within a BLOCK construct! */
5889 if (gfc_current_state () == COMP_BLOCK)
5891 gfc_error ("INTENT is not allowed inside of BLOCK at %C");
5895 intent = match_intent_spec ();
5896 if (intent == INTENT_UNKNOWN)
5899 gfc_clear_attr (¤t_attr);
5900 current_attr.intent = intent;
5902 return attr_decl ();
5907 gfc_match_intrinsic (void)
5910 gfc_clear_attr (¤t_attr);
5911 current_attr.intrinsic = 1;
5913 return attr_decl ();
5918 gfc_match_optional (void)
5920 /* This is not allowed within a BLOCK construct! */
5921 if (gfc_current_state () == COMP_BLOCK)
5923 gfc_error ("OPTIONAL is not allowed inside of BLOCK at %C");
5927 gfc_clear_attr (¤t_attr);
5928 current_attr.optional = 1;
5930 return attr_decl ();
5935 gfc_match_pointer (void)
5937 gfc_gobble_whitespace ();
5938 if (gfc_peek_ascii_char () == '(')
5940 if (!gfc_option.flag_cray_pointer)
5942 gfc_error ("Cray pointer declaration at %C requires -fcray-pointer "
5946 return cray_pointer_decl ();
5950 gfc_clear_attr (¤t_attr);
5951 current_attr.pointer = 1;
5953 return attr_decl ();
5959 gfc_match_allocatable (void)
5961 gfc_clear_attr (¤t_attr);
5962 current_attr.allocatable = 1;
5964 return attr_decl ();
5969 gfc_match_dimension (void)
5971 gfc_clear_attr (¤t_attr);
5972 current_attr.dimension = 1;
5974 return attr_decl ();
5979 gfc_match_target (void)
5981 gfc_clear_attr (¤t_attr);
5982 current_attr.target = 1;
5984 return attr_decl ();
5988 /* Match the list of entities being specified in a PUBLIC or PRIVATE
5992 access_attr_decl (gfc_statement st)
5994 char name[GFC_MAX_SYMBOL_LEN + 1];
5995 interface_type type;
5998 gfc_intrinsic_op op;
6001 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6006 m = gfc_match_generic_spec (&type, name, &op);
6009 if (m == MATCH_ERROR)
6014 case INTERFACE_NAMELESS:
6015 case INTERFACE_ABSTRACT:
6018 case INTERFACE_GENERIC:
6019 if (gfc_get_symbol (name, NULL, &sym))
6022 if (gfc_add_access (&sym->attr, (st == ST_PUBLIC)
6023 ? ACCESS_PUBLIC : ACCESS_PRIVATE,
6024 sym->name, NULL) == FAILURE)
6029 case INTERFACE_INTRINSIC_OP:
6030 if (gfc_current_ns->operator_access[op] == ACCESS_UNKNOWN)
6032 gfc_current_ns->operator_access[op] =
6033 (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE;
6037 gfc_error ("Access specification of the %s operator at %C has "
6038 "already been specified", gfc_op2string (op));
6044 case INTERFACE_USER_OP:
6045 uop = gfc_get_uop (name);
6047 if (uop->access == ACCESS_UNKNOWN)
6049 uop->access = (st == ST_PUBLIC)
6050 ? ACCESS_PUBLIC : ACCESS_PRIVATE;
6054 gfc_error ("Access specification of the .%s. operator at %C "
6055 "has already been specified", sym->name);
6062 if (gfc_match_char (',') == MATCH_NO)
6066 if (gfc_match_eos () != MATCH_YES)
6071 gfc_syntax_error (st);
6079 gfc_match_protected (void)
6084 if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE)
6086 gfc_error ("PROTECTED at %C only allowed in specification "
6087 "part of a module");
6092 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED statement at %C")
6096 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6101 if (gfc_match_eos () == MATCH_YES)
6106 m = gfc_match_symbol (&sym, 0);
6110 if (gfc_add_protected (&sym->attr, sym->name, &gfc_current_locus)
6123 if (gfc_match_eos () == MATCH_YES)
6125 if (gfc_match_char (',') != MATCH_YES)
6132 gfc_error ("Syntax error in PROTECTED statement at %C");
6137 /* The PRIVATE statement is a bit weird in that it can be an attribute
6138 declaration, but also works as a standalone statement inside of a
6139 type declaration or a module. */
6142 gfc_match_private (gfc_statement *st)
6145 if (gfc_match ("private") != MATCH_YES)
6148 if (gfc_current_state () != COMP_MODULE
6149 && !(gfc_current_state () == COMP_DERIVED
6150 && gfc_state_stack->previous
6151 && gfc_state_stack->previous->state == COMP_MODULE)
6152 && !(gfc_current_state () == COMP_DERIVED_CONTAINS
6153 && gfc_state_stack->previous && gfc_state_stack->previous->previous
6154 && gfc_state_stack->previous->previous->state == COMP_MODULE))
6156 gfc_error ("PRIVATE statement at %C is only allowed in the "
6157 "specification part of a module");
6161 if (gfc_current_state () == COMP_DERIVED)
6163 if (gfc_match_eos () == MATCH_YES)
6169 gfc_syntax_error (ST_PRIVATE);
6173 if (gfc_match_eos () == MATCH_YES)
6180 return access_attr_decl (ST_PRIVATE);
6185 gfc_match_public (gfc_statement *st)
6188 if (gfc_match ("public") != MATCH_YES)
6191 if (gfc_current_state () != COMP_MODULE)
6193 gfc_error ("PUBLIC statement at %C is only allowed in the "
6194 "specification part of a module");
6198 if (gfc_match_eos () == MATCH_YES)
6205 return access_attr_decl (ST_PUBLIC);
6209 /* Workhorse for gfc_match_parameter. */
6219 m = gfc_match_symbol (&sym, 0);
6221 gfc_error ("Expected variable name at %C in PARAMETER statement");
6226 if (gfc_match_char ('=') == MATCH_NO)
6228 gfc_error ("Expected = sign in PARAMETER statement at %C");
6232 m = gfc_match_init_expr (&init);
6234 gfc_error ("Expected expression at %C in PARAMETER statement");
6238 if (sym->ts.type == BT_UNKNOWN
6239 && gfc_set_default_type (sym, 1, NULL) == FAILURE)
6245 if (gfc_check_assign_symbol (sym, init) == FAILURE
6246 || gfc_add_flavor (&sym->attr, FL_PARAMETER, sym->name, NULL) == FAILURE)
6254 gfc_error ("Initializing already initialized variable at %C");
6259 t = add_init_expr_to_sym (sym->name, &init, &gfc_current_locus);
6260 return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR;
6263 gfc_free_expr (init);
6268 /* Match a parameter statement, with the weird syntax that these have. */
6271 gfc_match_parameter (void)
6275 if (gfc_match_char ('(') == MATCH_NO)
6284 if (gfc_match (" )%t") == MATCH_YES)
6287 if (gfc_match_char (',') != MATCH_YES)
6289 gfc_error ("Unexpected characters in PARAMETER statement at %C");
6299 /* Save statements have a special syntax. */
6302 gfc_match_save (void)
6304 char n[GFC_MAX_SYMBOL_LEN+1];
6309 if (gfc_match_eos () == MATCH_YES)
6311 if (gfc_current_ns->seen_save)
6313 if (gfc_notify_std (GFC_STD_LEGACY, "Blanket SAVE statement at %C "
6314 "follows previous SAVE statement")
6319 gfc_current_ns->save_all = gfc_current_ns->seen_save = 1;
6323 if (gfc_current_ns->save_all)
6325 if (gfc_notify_std (GFC_STD_LEGACY, "SAVE statement at %C follows "
6326 "blanket SAVE statement")
6335 m = gfc_match_symbol (&sym, 0);
6339 if (gfc_add_save (&sym->attr, sym->name, &gfc_current_locus)
6351 m = gfc_match (" / %n /", &n);
6352 if (m == MATCH_ERROR)
6357 c = gfc_get_common (n, 0);
6360 gfc_current_ns->seen_save = 1;
6363 if (gfc_match_eos () == MATCH_YES)
6365 if (gfc_match_char (',') != MATCH_YES)
6372 gfc_error ("Syntax error in SAVE statement at %C");
6378 gfc_match_value (void)
6383 /* This is not allowed within a BLOCK construct! */
6384 if (gfc_current_state () == COMP_BLOCK)
6386 gfc_error ("VALUE is not allowed inside of BLOCK at %C");
6390 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE statement at %C")
6394 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6399 if (gfc_match_eos () == MATCH_YES)
6404 m = gfc_match_symbol (&sym, 0);
6408 if (gfc_add_value (&sym->attr, sym->name, &gfc_current_locus)
6421 if (gfc_match_eos () == MATCH_YES)
6423 if (gfc_match_char (',') != MATCH_YES)
6430 gfc_error ("Syntax error in VALUE statement at %C");
6436 gfc_match_volatile (void)
6441 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VOLATILE statement at %C")
6445 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6450 if (gfc_match_eos () == MATCH_YES)
6455 /* VOLATILE is special because it can be added to host-associated
6457 m = gfc_match_symbol (&sym, 1);
6461 if (gfc_add_volatile (&sym->attr, sym->name, &gfc_current_locus)
6474 if (gfc_match_eos () == MATCH_YES)
6476 if (gfc_match_char (',') != MATCH_YES)
6483 gfc_error ("Syntax error in VOLATILE statement at %C");
6488 /* Match a module procedure statement. Note that we have to modify
6489 symbols in the parent's namespace because the current one was there
6490 to receive symbols that are in an interface's formal argument list. */
6493 gfc_match_modproc (void)
6495 char name[GFC_MAX_SYMBOL_LEN + 1];
6498 gfc_namespace *module_ns;
6499 gfc_interface *old_interface_head, *interface;
6501 if (gfc_state_stack->state != COMP_INTERFACE
6502 || gfc_state_stack->previous == NULL
6503 || current_interface.type == INTERFACE_NAMELESS
6504 || current_interface.type == INTERFACE_ABSTRACT)
6506 gfc_error ("MODULE PROCEDURE at %C must be in a generic module "
6511 module_ns = gfc_current_ns->parent;
6512 for (; module_ns; module_ns = module_ns->parent)
6513 if (module_ns->proc_name->attr.flavor == FL_MODULE
6514 || module_ns->proc_name->attr.flavor == FL_PROGRAM
6515 || (module_ns->proc_name->attr.flavor == FL_PROCEDURE
6516 && !module_ns->proc_name->attr.contained))
6519 if (module_ns == NULL)
6522 /* Store the current state of the interface. We will need it if we
6523 end up with a syntax error and need to recover. */
6524 old_interface_head = gfc_current_interface_head ();
6528 locus old_locus = gfc_current_locus;
6531 m = gfc_match_name (name);
6537 /* Check for syntax error before starting to add symbols to the
6538 current namespace. */
6539 if (gfc_match_eos () == MATCH_YES)
6541 if (!last && gfc_match_char (',') != MATCH_YES)
6544 /* Now we're sure the syntax is valid, we process this item
6546 if (gfc_get_symbol (name, module_ns, &sym))
6549 if (sym->attr.intrinsic)
6551 gfc_error ("Intrinsic procedure at %L cannot be a MODULE "
6552 "PROCEDURE", &old_locus);
6556 if (sym->attr.proc != PROC_MODULE
6557 && gfc_add_procedure (&sym->attr, PROC_MODULE,
6558 sym->name, NULL) == FAILURE)
6561 if (gfc_add_interface (sym) == FAILURE)
6564 sym->attr.mod_proc = 1;
6565 sym->declared_at = old_locus;
6574 /* Restore the previous state of the interface. */
6575 interface = gfc_current_interface_head ();
6576 gfc_set_current_interface_head (old_interface_head);
6578 /* Free the new interfaces. */
6579 while (interface != old_interface_head)
6581 gfc_interface *i = interface->next;
6582 gfc_free (interface);
6586 /* And issue a syntax error. */
6587 gfc_syntax_error (ST_MODULE_PROC);
6592 /* Check a derived type that is being extended. */
6594 check_extended_derived_type (char *name)
6596 gfc_symbol *extended;
6598 if (gfc_find_symbol (name, gfc_current_ns, 1, &extended))
6600 gfc_error ("Ambiguous symbol in TYPE definition at %C");
6606 gfc_error ("No such symbol in TYPE definition at %C");
6610 if (extended->attr.flavor != FL_DERIVED)
6612 gfc_error ("'%s' in EXTENDS expression at %C is not a "
6613 "derived type", name);
6617 if (extended->attr.is_bind_c)
6619 gfc_error ("'%s' cannot be extended at %C because it "
6620 "is BIND(C)", extended->name);
6624 if (extended->attr.sequence)
6626 gfc_error ("'%s' cannot be extended at %C because it "
6627 "is a SEQUENCE type", extended->name);
6635 /* Match the optional attribute specifiers for a type declaration.
6636 Return MATCH_ERROR if an error is encountered in one of the handled
6637 attributes (public, private, bind(c)), MATCH_NO if what's found is
6638 not a handled attribute, and MATCH_YES otherwise. TODO: More error
6639 checking on attribute conflicts needs to be done. */
6642 gfc_get_type_attr_spec (symbol_attribute *attr, char *name)
6644 /* See if the derived type is marked as private. */
6645 if (gfc_match (" , private") == MATCH_YES)
6647 if (gfc_current_state () != COMP_MODULE)
6649 gfc_error ("Derived type at %C can only be PRIVATE in the "
6650 "specification part of a module");
6654 if (gfc_add_access (attr, ACCESS_PRIVATE, NULL, NULL) == FAILURE)
6657 else if (gfc_match (" , public") == MATCH_YES)
6659 if (gfc_current_state () != COMP_MODULE)
6661 gfc_error ("Derived type at %C can only be PUBLIC in the "
6662 "specification part of a module");
6666 if (gfc_add_access (attr, ACCESS_PUBLIC, NULL, NULL) == FAILURE)
6669 else if (gfc_match (" , bind ( c )") == MATCH_YES)
6671 /* If the type is defined to be bind(c) it then needs to make
6672 sure that all fields are interoperable. This will
6673 need to be a semantic check on the finished derived type.
6674 See 15.2.3 (lines 9-12) of F2003 draft. */
6675 if (gfc_add_is_bind_c (attr, NULL, &gfc_current_locus, 0) != SUCCESS)
6678 /* TODO: attr conflicts need to be checked, probably in symbol.c. */
6680 else if (gfc_match (" , abstract") == MATCH_YES)
6682 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ABSTRACT type at %C")
6686 if (gfc_add_abstract (attr, &gfc_current_locus) == FAILURE)
6689 else if (name && gfc_match(" , extends ( %n )", name) == MATCH_YES)
6691 if (gfc_add_extension (attr, &gfc_current_locus) == FAILURE)
6697 /* If we get here, something matched. */
6702 /* Assign a hash value for a derived type. The algorithm is that of
6703 SDBM. The hashed string is '[module_name #] derived_name'. */
6705 hash_value (gfc_symbol *sym)
6707 unsigned int hash = 0;
6711 /* Hash of the module or procedure name. */
6712 if (sym->module != NULL)
6714 else if (sym->ns && sym->ns->proc_name
6715 && sym->ns->proc_name->attr.flavor == FL_MODULE)
6716 c = sym->ns->proc_name->name;
6723 for (i = 0; i < len; i++, c++)
6724 hash = (hash << 6) + (hash << 16) - hash + (*c);
6726 /* Disambiguate between 'a' in 'aa' and 'aa' in 'a'. */
6727 hash = (hash << 6) + (hash << 16) - hash + '#';
6730 /* Hash of the derived type name. */
6731 len = strlen (sym->name);
6733 for (i = 0; i < len; i++, c++)
6734 hash = (hash << 6) + (hash << 16) - hash + (*c);
6736 /* Return the hash but take the modulus for the sake of module read,
6737 even though this slightly increases the chance of collision. */
6738 return (hash % 100000000);
6742 /* Match the beginning of a derived type declaration. If a type name
6743 was the result of a function, then it is possible to have a symbol
6744 already to be known as a derived type yet have no components. */
6747 gfc_match_derived_decl (void)
6749 char name[GFC_MAX_SYMBOL_LEN + 1];
6750 char parent[GFC_MAX_SYMBOL_LEN + 1];
6751 symbol_attribute attr;
6753 gfc_symbol *extended;
6755 match is_type_attr_spec = MATCH_NO;
6756 bool seen_attr = false;
6758 if (gfc_current_state () == COMP_DERIVED)
6763 gfc_clear_attr (&attr);
6768 is_type_attr_spec = gfc_get_type_attr_spec (&attr, parent);
6769 if (is_type_attr_spec == MATCH_ERROR)
6771 if (is_type_attr_spec == MATCH_YES)
6773 } while (is_type_attr_spec == MATCH_YES);
6775 /* Deal with derived type extensions. The extension attribute has
6776 been added to 'attr' but now the parent type must be found and
6779 extended = check_extended_derived_type (parent);
6781 if (parent[0] && !extended)
6784 if (gfc_match (" ::") != MATCH_YES && seen_attr)
6786 gfc_error ("Expected :: in TYPE definition at %C");
6790 m = gfc_match (" %n%t", name);
6794 /* Make sure the name is not the name of an intrinsic type. */
6795 if (gfc_is_intrinsic_typename (name))
6797 gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic "
6802 if (gfc_get_symbol (name, NULL, &sym))
6805 if (sym->ts.type != BT_UNKNOWN)
6807 gfc_error ("Derived type name '%s' at %C already has a basic type "
6808 "of %s", sym->name, gfc_typename (&sym->ts));
6812 /* The symbol may already have the derived attribute without the
6813 components. The ways this can happen is via a function
6814 definition, an INTRINSIC statement or a subtype in another
6815 derived type that is a pointer. The first part of the AND clause
6816 is true if the symbol is not the return value of a function. */
6817 if (sym->attr.flavor != FL_DERIVED
6818 && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE)
6821 if (sym->components != NULL || sym->attr.zero_comp)
6823 gfc_error ("Derived type definition of '%s' at %C has already been "
6824 "defined", sym->name);
6828 if (attr.access != ACCESS_UNKNOWN
6829 && gfc_add_access (&sym->attr, attr.access, sym->name, NULL) == FAILURE)
6832 /* See if the derived type was labeled as bind(c). */
6833 if (attr.is_bind_c != 0)
6834 sym->attr.is_bind_c = attr.is_bind_c;
6836 /* Construct the f2k_derived namespace if it is not yet there. */
6837 if (!sym->f2k_derived)
6838 sym->f2k_derived = gfc_get_namespace (NULL, 0);
6840 if (extended && !sym->components)
6845 /* Add the extended derived type as the first component. */
6846 gfc_add_component (sym, parent, &p);
6848 gfc_set_sym_referenced (extended);
6850 p->ts.type = BT_DERIVED;
6851 p->ts.u.derived = extended;
6852 p->initializer = gfc_default_initializer (&p->ts);
6854 /* Set extension level. */
6855 if (extended->attr.extension == 255)
6857 /* Since the extension field is 8 bit wide, we can only have
6858 up to 255 extension levels. */
6859 gfc_error ("Maximum extension level reached with type '%s' at %L",
6860 extended->name, &extended->declared_at);
6863 sym->attr.extension = extended->attr.extension + 1;
6865 /* Provide the links between the extended type and its extension. */
6866 if (!extended->f2k_derived)
6867 extended->f2k_derived = gfc_get_namespace (NULL, 0);
6868 st = gfc_new_symtree (&extended->f2k_derived->sym_root, sym->name);
6872 if (!sym->hash_value)
6873 /* Set the hash for the compound name for this type. */
6874 sym->hash_value = hash_value (sym);
6876 /* Take over the ABSTRACT attribute. */
6877 sym->attr.abstract = attr.abstract;
6879 gfc_new_block = sym;
6885 /* Cray Pointees can be declared as:
6886 pointer (ipt, a (n,m,...,*))
6887 By default, this is treated as an AS_ASSUMED_SIZE array. We'll
6888 cheat and set a constant bound of 1 for the last dimension, if this
6889 is the case. Since there is no bounds-checking for Cray Pointees,
6890 this will be okay. */
6893 gfc_mod_pointee_as (gfc_array_spec *as)
6895 as->cray_pointee = true; /* This will be useful to know later. */
6896 if (as->type == AS_ASSUMED_SIZE)
6898 as->type = AS_EXPLICIT;
6899 as->upper[as->rank - 1] = gfc_int_expr (1);
6900 as->cp_was_assumed = true;
6902 else if (as->type == AS_ASSUMED_SHAPE)
6904 gfc_error ("Cray Pointee at %C cannot be assumed shape array");
6911 /* Match the enum definition statement, here we are trying to match
6912 the first line of enum definition statement.
6913 Returns MATCH_YES if match is found. */
6916 gfc_match_enum (void)
6920 m = gfc_match_eos ();
6924 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENUM and ENUMERATOR at %C")
6932 /* Returns an initializer whose value is one higher than the value of the
6933 LAST_INITIALIZER argument. If the argument is NULL, the
6934 initializers value will be set to zero. The initializer's kind
6935 will be set to gfc_c_int_kind.
6937 If -fshort-enums is given, the appropriate kind will be selected
6938 later after all enumerators have been parsed. A warning is issued
6939 here if an initializer exceeds gfc_c_int_kind. */
6942 enum_initializer (gfc_expr *last_initializer, locus where)
6946 result = gfc_get_expr ();
6947 result->expr_type = EXPR_CONSTANT;
6948 result->ts.type = BT_INTEGER;
6949 result->ts.kind = gfc_c_int_kind;
6950 result->where = where;
6952 mpz_init (result->value.integer);
6954 if (last_initializer != NULL)
6956 mpz_add_ui (result->value.integer, last_initializer->value.integer, 1);
6957 result->where = last_initializer->where;
6959 if (gfc_check_integer_range (result->value.integer,
6960 gfc_c_int_kind) != ARITH_OK)
6962 gfc_error ("Enumerator exceeds the C integer type at %C");
6968 /* Control comes here, if it's the very first enumerator and no
6969 initializer has been given. It will be initialized to zero. */
6970 mpz_set_si (result->value.integer, 0);
6977 /* Match a variable name with an optional initializer. When this
6978 subroutine is called, a variable is expected to be parsed next.
6979 Depending on what is happening at the moment, updates either the
6980 symbol table or the current interface. */
6983 enumerator_decl (void)
6985 char name[GFC_MAX_SYMBOL_LEN + 1];
6986 gfc_expr *initializer;
6987 gfc_array_spec *as = NULL;
6995 old_locus = gfc_current_locus;
6997 /* When we get here, we've just matched a list of attributes and
6998 maybe a type and a double colon. The next thing we expect to see
6999 is the name of the symbol. */
7000 m = gfc_match_name (name);
7004 var_locus = gfc_current_locus;
7006 /* OK, we've successfully matched the declaration. Now put the
7007 symbol in the current namespace. If we fail to create the symbol,
7009 if (build_sym (name, NULL, &as, &var_locus) == FAILURE)
7015 /* The double colon must be present in order to have initializers.
7016 Otherwise the statement is ambiguous with an assignment statement. */
7019 if (gfc_match_char ('=') == MATCH_YES)
7021 m = gfc_match_init_expr (&initializer);
7024 gfc_error ("Expected an initialization expression at %C");
7033 /* If we do not have an initializer, the initialization value of the
7034 previous enumerator (stored in last_initializer) is incremented
7035 by 1 and is used to initialize the current enumerator. */
7036 if (initializer == NULL)
7037 initializer = enum_initializer (last_initializer, old_locus);
7039 if (initializer == NULL || initializer->ts.type != BT_INTEGER)
7041 gfc_error("ENUMERATOR %L not initialized with integer expression",
7044 gfc_free_enum_history ();
7048 /* Store this current initializer, for the next enumerator variable
7049 to be parsed. add_init_expr_to_sym() zeros initializer, so we
7050 use last_initializer below. */
7051 last_initializer = initializer;
7052 t = add_init_expr_to_sym (name, &initializer, &var_locus);
7054 /* Maintain enumerator history. */
7055 gfc_find_symbol (name, NULL, 0, &sym);
7056 create_enum_history (sym, last_initializer);
7058 return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR;
7061 /* Free stuff up and return. */
7062 gfc_free_expr (initializer);
7068 /* Match the enumerator definition statement. */
7071 gfc_match_enumerator_def (void)
7076 gfc_clear_ts (¤t_ts);
7078 m = gfc_match (" enumerator");
7082 m = gfc_match (" :: ");
7083 if (m == MATCH_ERROR)
7086 colon_seen = (m == MATCH_YES);
7088 if (gfc_current_state () != COMP_ENUM)
7090 gfc_error ("ENUM definition statement expected before %C");
7091 gfc_free_enum_history ();
7095 (¤t_ts)->type = BT_INTEGER;
7096 (¤t_ts)->kind = gfc_c_int_kind;
7098 gfc_clear_attr (¤t_attr);
7099 t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, NULL);
7108 m = enumerator_decl ();
7109 if (m == MATCH_ERROR)
7114 if (gfc_match_eos () == MATCH_YES)
7116 if (gfc_match_char (',') != MATCH_YES)
7120 if (gfc_current_state () == COMP_ENUM)
7122 gfc_free_enum_history ();
7123 gfc_error ("Syntax error in ENUMERATOR definition at %C");
7128 gfc_free_array_spec (current_as);
7135 /* Match binding attributes. */
7138 match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc)
7140 bool found_passing = false;
7141 bool seen_ptr = false;
7142 match m = MATCH_YES;
7144 /* Intialize to defaults. Do so even before the MATCH_NO check so that in
7145 this case the defaults are in there. */
7146 ba->access = ACCESS_UNKNOWN;
7147 ba->pass_arg = NULL;
7148 ba->pass_arg_num = 0;
7150 ba->non_overridable = 0;
7154 /* If we find a comma, we believe there are binding attributes. */
7155 m = gfc_match_char (',');
7161 /* Access specifier. */
7163 m = gfc_match (" public");
7164 if (m == MATCH_ERROR)
7168 if (ba->access != ACCESS_UNKNOWN)
7170 gfc_error ("Duplicate access-specifier at %C");
7174 ba->access = ACCESS_PUBLIC;
7178 m = gfc_match (" private");
7179 if (m == MATCH_ERROR)
7183 if (ba->access != ACCESS_UNKNOWN)
7185 gfc_error ("Duplicate access-specifier at %C");
7189 ba->access = ACCESS_PRIVATE;
7193 /* If inside GENERIC, the following is not allowed. */
7198 m = gfc_match (" nopass");
7199 if (m == MATCH_ERROR)
7205 gfc_error ("Binding attributes already specify passing,"
7206 " illegal NOPASS at %C");
7210 found_passing = true;
7215 /* PASS possibly including argument. */
7216 m = gfc_match (" pass");
7217 if (m == MATCH_ERROR)
7221 char arg[GFC_MAX_SYMBOL_LEN + 1];
7225 gfc_error ("Binding attributes already specify passing,"
7226 " illegal PASS at %C");
7230 m = gfc_match (" ( %n )", arg);
7231 if (m == MATCH_ERROR)
7234 ba->pass_arg = gfc_get_string (arg);
7235 gcc_assert ((m == MATCH_YES) == (ba->pass_arg != NULL));
7237 found_passing = true;
7245 m = gfc_match (" pointer");
7246 if (m == MATCH_ERROR)
7252 gfc_error ("Duplicate POINTER attribute at %C");
7262 /* NON_OVERRIDABLE flag. */
7263 m = gfc_match (" non_overridable");
7264 if (m == MATCH_ERROR)
7268 if (ba->non_overridable)
7270 gfc_error ("Duplicate NON_OVERRIDABLE at %C");
7274 ba->non_overridable = 1;
7278 /* DEFERRED flag. */
7279 m = gfc_match (" deferred");
7280 if (m == MATCH_ERROR)
7286 gfc_error ("Duplicate DEFERRED at %C");
7297 /* Nothing matching found. */
7299 gfc_error ("Expected access-specifier at %C");
7301 gfc_error ("Expected binding attribute at %C");
7304 while (gfc_match_char (',') == MATCH_YES);
7306 /* NON_OVERRIDABLE and DEFERRED exclude themselves. */
7307 if (ba->non_overridable && ba->deferred)
7309 gfc_error ("NON_OVERRIDABLE and DEFERRED can't both appear at %C");
7316 if (ba->access == ACCESS_UNKNOWN)
7317 ba->access = gfc_typebound_default_access;
7319 if (ppc && !seen_ptr)
7321 gfc_error ("POINTER attribute is required for procedure pointer component"
7333 /* Match a PROCEDURE specific binding inside a derived type. */
7336 match_procedure_in_type (void)
7338 char name[GFC_MAX_SYMBOL_LEN + 1];
7339 char target_buf[GFC_MAX_SYMBOL_LEN + 1];
7340 char* target = NULL;
7341 gfc_typebound_proc* tb;
7349 /* Check current state. */
7350 gcc_assert (gfc_state_stack->state == COMP_DERIVED_CONTAINS);
7351 block = gfc_state_stack->previous->sym;
7354 /* Try to match PROCEDURE(interface). */
7355 if (gfc_match (" (") == MATCH_YES)
7357 m = gfc_match_name (target_buf);
7358 if (m == MATCH_ERROR)
7362 gfc_error ("Interface-name expected after '(' at %C");
7366 if (gfc_match (" )") != MATCH_YES)
7368 gfc_error ("')' expected at %C");
7372 target = target_buf;
7375 /* Construct the data structure. */
7376 tb = gfc_get_typebound_proc ();
7377 tb->where = gfc_current_locus;
7380 /* Match binding attributes. */
7381 m = match_binding_attributes (tb, false, false);
7382 if (m == MATCH_ERROR)
7384 seen_attrs = (m == MATCH_YES);
7386 /* Check that attribute DEFERRED is given iff an interface is specified, which
7387 means target != NULL. */
7388 if (tb->deferred && !target)
7390 gfc_error ("Interface must be specified for DEFERRED binding at %C");
7393 if (target && !tb->deferred)
7395 gfc_error ("PROCEDURE(interface) at %C should be declared DEFERRED");
7399 /* Match the colons. */
7400 m = gfc_match (" ::");
7401 if (m == MATCH_ERROR)
7403 seen_colons = (m == MATCH_YES);
7404 if (seen_attrs && !seen_colons)
7406 gfc_error ("Expected '::' after binding-attributes at %C");
7410 /* Match the binding name. */
7411 m = gfc_match_name (name);
7412 if (m == MATCH_ERROR)
7416 gfc_error ("Expected binding name at %C");
7420 /* Try to match the '=> target', if it's there. */
7421 m = gfc_match (" =>");
7422 if (m == MATCH_ERROR)
7428 gfc_error ("'=> target' is invalid for DEFERRED binding at %C");
7434 gfc_error ("'::' needed in PROCEDURE binding with explicit target"
7439 m = gfc_match_name (target_buf);
7440 if (m == MATCH_ERROR)
7444 gfc_error ("Expected binding target after '=>' at %C");
7447 target = target_buf;
7450 /* Now we should have the end. */
7451 m = gfc_match_eos ();
7452 if (m == MATCH_ERROR)
7456 gfc_error ("Junk after PROCEDURE declaration at %C");
7460 /* If no target was found, it has the same name as the binding. */
7464 /* Get the namespace to insert the symbols into. */
7465 ns = block->f2k_derived;
7468 /* If the binding is DEFERRED, check that the containing type is ABSTRACT. */
7469 if (tb->deferred && !block->attr.abstract)
7471 gfc_error ("Type '%s' containing DEFERRED binding at %C is not ABSTRACT",
7476 /* See if we already have a binding with this name in the symtree which would
7477 be an error. If a GENERIC already targetted this binding, it may be
7478 already there but then typebound is still NULL. */
7479 stree = gfc_find_symtree (ns->tb_sym_root, name);
7480 if (stree && stree->n.tb)
7482 gfc_error ("There's already a procedure with binding name '%s' for the"
7483 " derived type '%s' at %C", name, block->name);
7487 /* Insert it and set attributes. */
7491 stree = gfc_new_symtree (&ns->tb_sym_root, name);
7496 if (gfc_get_sym_tree (target, gfc_current_ns, &tb->u.specific, false))
7498 gfc_set_sym_referenced (tb->u.specific->n.sym);
7504 /* Match a GENERIC procedure binding inside a derived type. */
7507 gfc_match_generic (void)
7509 char name[GFC_MAX_SYMBOL_LEN + 1];
7510 char bind_name[GFC_MAX_SYMBOL_LEN + 16]; /* Allow space for OPERATOR(...). */
7512 gfc_typebound_proc tbattr; /* Used for match_binding_attributes. */
7513 gfc_typebound_proc* tb;
7515 interface_type op_type;
7516 gfc_intrinsic_op op;
7519 /* Check current state. */
7520 if (gfc_current_state () == COMP_DERIVED)
7522 gfc_error ("GENERIC at %C must be inside a derived-type CONTAINS");
7525 if (gfc_current_state () != COMP_DERIVED_CONTAINS)
7527 block = gfc_state_stack->previous->sym;
7528 ns = block->f2k_derived;
7529 gcc_assert (block && ns);
7531 /* See if we get an access-specifier. */
7532 m = match_binding_attributes (&tbattr, true, false);
7533 if (m == MATCH_ERROR)
7536 /* Now the colons, those are required. */
7537 if (gfc_match (" ::") != MATCH_YES)
7539 gfc_error ("Expected '::' at %C");
7543 /* Match the binding name; depending on type (operator / generic) format
7544 it for future error messages into bind_name. */
7546 m = gfc_match_generic_spec (&op_type, name, &op);
7547 if (m == MATCH_ERROR)
7551 gfc_error ("Expected generic name or operator descriptor at %C");
7557 case INTERFACE_GENERIC:
7558 snprintf (bind_name, sizeof (bind_name), "%s", name);
7561 case INTERFACE_USER_OP:
7562 snprintf (bind_name, sizeof (bind_name), "OPERATOR(.%s.)", name);
7565 case INTERFACE_INTRINSIC_OP:
7566 snprintf (bind_name, sizeof (bind_name), "OPERATOR(%s)",
7567 gfc_op2string (op));
7574 /* Match the required =>. */
7575 if (gfc_match (" =>") != MATCH_YES)
7577 gfc_error ("Expected '=>' at %C");
7581 /* Try to find existing GENERIC binding with this name / for this operator;
7582 if there is something, check that it is another GENERIC and then extend
7583 it rather than building a new node. Otherwise, create it and put it
7584 at the right position. */
7588 case INTERFACE_USER_OP:
7589 case INTERFACE_GENERIC:
7591 const bool is_op = (op_type == INTERFACE_USER_OP);
7594 st = gfc_find_symtree (is_op ? ns->tb_uop_root : ns->tb_sym_root, name);
7606 case INTERFACE_INTRINSIC_OP:
7616 if (!tb->is_generic)
7618 gcc_assert (op_type == INTERFACE_GENERIC);
7619 gfc_error ("There's already a non-generic procedure with binding name"
7620 " '%s' for the derived type '%s' at %C",
7621 bind_name, block->name);
7625 if (tb->access != tbattr.access)
7627 gfc_error ("Binding at %C must have the same access as already"
7628 " defined binding '%s'", bind_name);
7634 tb = gfc_get_typebound_proc ();
7635 tb->where = gfc_current_locus;
7636 tb->access = tbattr.access;
7638 tb->u.generic = NULL;
7642 case INTERFACE_GENERIC:
7643 case INTERFACE_USER_OP:
7645 const bool is_op = (op_type == INTERFACE_USER_OP);
7648 st = gfc_new_symtree (is_op ? &ns->tb_uop_root : &ns->tb_sym_root,
7656 case INTERFACE_INTRINSIC_OP:
7665 /* Now, match all following names as specific targets. */
7668 gfc_symtree* target_st;
7669 gfc_tbp_generic* target;
7671 m = gfc_match_name (name);
7672 if (m == MATCH_ERROR)
7676 gfc_error ("Expected specific binding name at %C");
7680 target_st = gfc_get_tbp_symtree (&ns->tb_sym_root, name);
7682 /* See if this is a duplicate specification. */
7683 for (target = tb->u.generic; target; target = target->next)
7684 if (target_st == target->specific_st)
7686 gfc_error ("'%s' already defined as specific binding for the"
7687 " generic '%s' at %C", name, bind_name);
7691 target = gfc_get_tbp_generic ();
7692 target->specific_st = target_st;
7693 target->specific = NULL;
7694 target->next = tb->u.generic;
7695 tb->u.generic = target;
7697 while (gfc_match (" ,") == MATCH_YES);
7699 /* Here should be the end. */
7700 if (gfc_match_eos () != MATCH_YES)
7702 gfc_error ("Junk after GENERIC binding at %C");
7713 /* Match a FINAL declaration inside a derived type. */
7716 gfc_match_final_decl (void)
7718 char name[GFC_MAX_SYMBOL_LEN + 1];
7721 gfc_namespace* module_ns;
7725 if (gfc_state_stack->state != COMP_DERIVED_CONTAINS)
7727 gfc_error ("FINAL declaration at %C must be inside a derived type "
7728 "CONTAINS section");
7732 block = gfc_state_stack->previous->sym;
7735 if (!gfc_state_stack->previous || !gfc_state_stack->previous->previous
7736 || gfc_state_stack->previous->previous->state != COMP_MODULE)
7738 gfc_error ("Derived type declaration with FINAL at %C must be in the"
7739 " specification part of a MODULE");
7743 module_ns = gfc_current_ns;
7744 gcc_assert (module_ns);
7745 gcc_assert (module_ns->proc_name->attr.flavor == FL_MODULE);
7747 /* Match optional ::, don't care about MATCH_YES or MATCH_NO. */
7748 if (gfc_match (" ::") == MATCH_ERROR)
7751 /* Match the sequence of procedure names. */
7758 if (first && gfc_match_eos () == MATCH_YES)
7760 gfc_error ("Empty FINAL at %C");
7764 m = gfc_match_name (name);
7767 gfc_error ("Expected module procedure name at %C");
7770 else if (m != MATCH_YES)
7773 if (gfc_match_eos () == MATCH_YES)
7775 if (!last && gfc_match_char (',') != MATCH_YES)
7777 gfc_error ("Expected ',' at %C");
7781 if (gfc_get_symbol (name, module_ns, &sym))
7783 gfc_error ("Unknown procedure name \"%s\" at %C", name);
7787 /* Mark the symbol as module procedure. */
7788 if (sym->attr.proc != PROC_MODULE
7789 && gfc_add_procedure (&sym->attr, PROC_MODULE,
7790 sym->name, NULL) == FAILURE)
7793 /* Check if we already have this symbol in the list, this is an error. */
7794 for (f = block->f2k_derived->finalizers; f; f = f->next)
7795 if (f->proc_sym == sym)
7797 gfc_error ("'%s' at %C is already defined as FINAL procedure!",
7802 /* Add this symbol to the list of finalizers. */
7803 gcc_assert (block->f2k_derived);
7805 f = XCNEW (gfc_finalizer);
7807 f->proc_tree = NULL;
7808 f->where = gfc_current_locus;
7809 f->next = block->f2k_derived->finalizers;
7810 block->f2k_derived->finalizers = f;
7820 const ext_attr_t ext_attr_list[] = {
7821 { "dllimport", EXT_ATTR_DLLIMPORT, "dllimport" },
7822 { "dllexport", EXT_ATTR_DLLEXPORT, "dllexport" },
7823 { "cdecl", EXT_ATTR_CDECL, "cdecl" },
7824 { "stdcall", EXT_ATTR_STDCALL, "stdcall" },
7825 { "fastcall", EXT_ATTR_FASTCALL, "fastcall" },
7826 { NULL, EXT_ATTR_LAST, NULL }
7829 /* Match a !GCC$ ATTRIBUTES statement of the form:
7830 !GCC$ ATTRIBUTES attribute-list :: var-name [, var-name] ...
7831 When we come here, we have already matched the !GCC$ ATTRIBUTES string.
7833 TODO: We should support all GCC attributes using the same syntax for
7834 the attribute list, i.e. the list in C
7835 __attributes(( attribute-list ))
7837 !GCC$ ATTRIBUTES attribute-list ::
7838 Cf. c-parser.c's c_parser_attributes; the data can then directly be
7841 As there is absolutely no risk of confusion, we should never return
7844 gfc_match_gcc_attributes (void)
7846 symbol_attribute attr;
7847 char name[GFC_MAX_SYMBOL_LEN + 1];
7852 gfc_clear_attr (&attr);
7857 if (gfc_match_name (name) != MATCH_YES)
7860 for (id = 0; id < EXT_ATTR_LAST; id++)
7861 if (strcmp (name, ext_attr_list[id].name) == 0)
7864 if (id == EXT_ATTR_LAST)
7866 gfc_error ("Unknown attribute in !GCC$ ATTRIBUTES statement at %C");
7870 if (gfc_add_ext_attribute (&attr, (ext_attr_id_t) id, &gfc_current_locus)
7874 gfc_gobble_whitespace ();
7875 ch = gfc_next_ascii_char ();
7878 /* This is the successful exit condition for the loop. */
7879 if (gfc_next_ascii_char () == ':')
7889 if (gfc_match_eos () == MATCH_YES)
7894 m = gfc_match_name (name);
7898 if (find_special (name, &sym, true))
7901 sym->attr.ext_attr |= attr.ext_attr;
7903 if (gfc_match_eos () == MATCH_YES)
7906 if (gfc_match_char (',') != MATCH_YES)
7913 gfc_error ("Syntax error in !GCC$ ATTRIBUTES statement at %C");