1 /* Declaration statement matcher
2 Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008, 2009, 2010
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)
1813 && gfc_state_stack->state != COMP_DERIVED)
1815 gfc_error ("Initialization of variable at %C is not allowed in "
1816 "a PURE procedure");
1825 if (initializer != NULL && current_attr.allocatable
1826 && gfc_current_state () == COMP_DERIVED)
1828 gfc_error ("Initialization of allocatable component at %C is not "
1834 /* Add the initializer. Note that it is fine if initializer is
1835 NULL here, because we sometimes also need to check if a
1836 declaration *must* have an initialization expression. */
1837 if (gfc_current_state () != COMP_DERIVED)
1838 t = add_init_expr_to_sym (name, &initializer, &var_locus);
1841 if (current_ts.type == BT_DERIVED
1842 && !current_attr.pointer && !initializer)
1843 initializer = gfc_default_initializer (¤t_ts);
1844 t = build_struct (name, cl, &initializer, &as);
1847 m = (t == SUCCESS) ? MATCH_YES : MATCH_ERROR;
1850 /* Free stuff up and return. */
1851 gfc_free_expr (initializer);
1852 gfc_free_array_spec (as);
1858 /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification.
1859 This assumes that the byte size is equal to the kind number for
1860 non-COMPLEX types, and equal to twice the kind number for COMPLEX. */
1863 gfc_match_old_kind_spec (gfc_typespec *ts)
1868 if (gfc_match_char ('*') != MATCH_YES)
1871 m = gfc_match_small_literal_int (&ts->kind, NULL);
1875 original_kind = ts->kind;
1877 /* Massage the kind numbers for complex types. */
1878 if (ts->type == BT_COMPLEX)
1882 gfc_error ("Old-style type declaration %s*%d not supported at %C",
1883 gfc_basic_typename (ts->type), original_kind);
1889 if (gfc_validate_kind (ts->type, ts->kind, true) < 0)
1891 gfc_error ("Old-style type declaration %s*%d not supported at %C",
1892 gfc_basic_typename (ts->type), original_kind);
1896 if (gfc_notify_std (GFC_STD_GNU, "Nonstandard type declaration %s*%d at %C",
1897 gfc_basic_typename (ts->type), original_kind) == FAILURE)
1904 /* Match a kind specification. Since kinds are generally optional, we
1905 usually return MATCH_NO if something goes wrong. If a "kind="
1906 string is found, then we know we have an error. */
1909 gfc_match_kind_spec (gfc_typespec *ts, bool kind_expr_only)
1921 where = loc = gfc_current_locus;
1926 if (gfc_match_char ('(') == MATCH_NO)
1929 /* Also gobbles optional text. */
1930 if (gfc_match (" kind = ") == MATCH_YES)
1933 loc = gfc_current_locus;
1936 n = gfc_match_init_expr (&e);
1940 if (gfc_matching_function)
1942 /* The function kind expression might include use associated or
1943 imported parameters and try again after the specification
1945 if (gfc_match_char (')') != MATCH_YES)
1947 gfc_error ("Missing right parenthesis at %C");
1953 gfc_undo_symbols ();
1958 /* ....or else, the match is real. */
1960 gfc_error ("Expected initialization expression at %C");
1968 gfc_error ("Expected scalar initialization expression at %C");
1973 msg = gfc_extract_int (e, &ts->kind);
1982 /* Before throwing away the expression, let's see if we had a
1983 C interoperable kind (and store the fact). */
1984 if (e->ts.is_c_interop == 1)
1986 /* Mark this as c interoperable if being declared with one
1987 of the named constants from iso_c_binding. */
1988 ts->is_c_interop = e->ts.is_iso_c;
1989 ts->f90_type = e->ts.f90_type;
1995 /* Ignore errors to this point, if we've gotten here. This means
1996 we ignore the m=MATCH_ERROR from above. */
1997 if (gfc_validate_kind (ts->type, ts->kind, true) < 0)
1999 gfc_error ("Kind %d not supported for type %s at %C", ts->kind,
2000 gfc_basic_typename (ts->type));
2001 gfc_current_locus = where;
2005 /* Warn if, e.g., c_int is used for a REAL variable, but not
2006 if, e.g., c_double is used for COMPLEX as the standard
2007 explicitly says that the kind type parameter for complex and real
2008 variable is the same, i.e. c_float == c_float_complex. */
2009 if (ts->f90_type != BT_UNKNOWN && ts->f90_type != ts->type
2010 && !((ts->f90_type == BT_REAL && ts->type == BT_COMPLEX)
2011 || (ts->f90_type == BT_COMPLEX && ts->type == BT_REAL)))
2012 gfc_warning_now ("C kind type parameter is for type %s but type at %L "
2013 "is %s", gfc_basic_typename (ts->f90_type), &where,
2014 gfc_basic_typename (ts->type));
2016 gfc_gobble_whitespace ();
2017 if ((c = gfc_next_ascii_char ()) != ')'
2018 && (ts->type != BT_CHARACTER || c != ','))
2020 if (ts->type == BT_CHARACTER)
2021 gfc_error ("Missing right parenthesis or comma at %C");
2023 gfc_error ("Missing right parenthesis at %C");
2027 /* All tests passed. */
2030 if(m == MATCH_ERROR)
2031 gfc_current_locus = where;
2033 /* Return what we know from the test(s). */
2038 gfc_current_locus = where;
2044 match_char_kind (int * kind, int * is_iso_c)
2053 where = gfc_current_locus;
2055 n = gfc_match_init_expr (&e);
2057 if (n != MATCH_YES && gfc_matching_function)
2059 /* The expression might include use-associated or imported
2060 parameters and try again after the specification
2063 gfc_undo_symbols ();
2068 gfc_error ("Expected initialization expression at %C");
2074 gfc_error ("Expected scalar initialization expression at %C");
2079 msg = gfc_extract_int (e, kind);
2080 *is_iso_c = e->ts.is_iso_c;
2090 /* Ignore errors to this point, if we've gotten here. This means
2091 we ignore the m=MATCH_ERROR from above. */
2092 if (gfc_validate_kind (BT_CHARACTER, *kind, true) < 0)
2094 gfc_error ("Kind %d is not supported for CHARACTER at %C", *kind);
2098 /* All tests passed. */
2101 if (m == MATCH_ERROR)
2102 gfc_current_locus = where;
2104 /* Return what we know from the test(s). */
2109 gfc_current_locus = where;
2114 /* Match the various kind/length specifications in a CHARACTER
2115 declaration. We don't return MATCH_NO. */
2118 gfc_match_char_spec (gfc_typespec *ts)
2120 int kind, seen_length, is_iso_c;
2130 /* Try the old-style specification first. */
2131 old_char_selector = 0;
2133 m = match_char_length (&len);
2137 old_char_selector = 1;
2142 m = gfc_match_char ('(');
2145 m = MATCH_YES; /* Character without length is a single char. */
2149 /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ). */
2150 if (gfc_match (" kind =") == MATCH_YES)
2152 m = match_char_kind (&kind, &is_iso_c);
2154 if (m == MATCH_ERROR)
2159 if (gfc_match (" , len =") == MATCH_NO)
2162 m = char_len_param_value (&len);
2165 if (m == MATCH_ERROR)
2172 /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>". */
2173 if (gfc_match (" len =") == MATCH_YES)
2175 m = char_len_param_value (&len);
2178 if (m == MATCH_ERROR)
2182 if (gfc_match_char (')') == MATCH_YES)
2185 if (gfc_match (" , kind =") != MATCH_YES)
2188 if (match_char_kind (&kind, &is_iso_c) == MATCH_ERROR)
2194 /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */
2195 m = char_len_param_value (&len);
2198 if (m == MATCH_ERROR)
2202 m = gfc_match_char (')');
2206 if (gfc_match_char (',') != MATCH_YES)
2209 gfc_match (" kind ="); /* Gobble optional text. */
2211 m = match_char_kind (&kind, &is_iso_c);
2212 if (m == MATCH_ERROR)
2218 /* Require a right-paren at this point. */
2219 m = gfc_match_char (')');
2224 gfc_error ("Syntax error in CHARACTER declaration at %C");
2226 gfc_free_expr (len);
2230 /* Deal with character functions after USE and IMPORT statements. */
2231 if (gfc_matching_function)
2233 gfc_free_expr (len);
2234 gfc_undo_symbols ();
2240 gfc_free_expr (len);
2244 /* Do some final massaging of the length values. */
2245 cl = gfc_new_charlen (gfc_current_ns, NULL);
2247 if (seen_length == 0)
2248 cl->length = gfc_int_expr (1);
2253 ts->kind = kind == 0 ? gfc_default_character_kind : kind;
2255 /* We have to know if it was a c interoperable kind so we can
2256 do accurate type checking of bind(c) procs, etc. */
2258 /* Mark this as c interoperable if being declared with one
2259 of the named constants from iso_c_binding. */
2260 ts->is_c_interop = is_iso_c;
2261 else if (len != NULL)
2262 /* Here, we might have parsed something such as: character(c_char)
2263 In this case, the parsing code above grabs the c_char when
2264 looking for the length (line 1690, roughly). it's the last
2265 testcase for parsing the kind params of a character variable.
2266 However, it's not actually the length. this seems like it
2268 To see if the user used a C interop kind, test the expr
2269 of the so called length, and see if it's C interoperable. */
2270 ts->is_c_interop = len->ts.is_iso_c;
2276 /* Matches a declaration-type-spec (F03:R502). If successful, sets the ts
2277 structure to the matched specification. This is necessary for FUNCTION and
2278 IMPLICIT statements.
2280 If implicit_flag is nonzero, then we don't check for the optional
2281 kind specification. Not doing so is needed for matching an IMPLICIT
2282 statement correctly. */
2285 gfc_match_decl_type_spec (gfc_typespec *ts, int implicit_flag)
2287 char name[GFC_MAX_SYMBOL_LEN + 1];
2291 bool seen_deferred_kind;
2293 /* A belt and braces check that the typespec is correctly being treated
2294 as a deferred characteristic association. */
2295 seen_deferred_kind = (gfc_current_state () == COMP_FUNCTION)
2296 && (gfc_current_block ()->result->ts.kind == -1)
2297 && (ts->kind == -1);
2299 if (seen_deferred_kind)
2302 /* Clear the current binding label, in case one is given. */
2303 curr_binding_label[0] = '\0';
2305 if (gfc_match (" byte") == MATCH_YES)
2307 if (gfc_notify_std (GFC_STD_GNU, "Extension: BYTE type at %C")
2311 if (gfc_validate_kind (BT_INTEGER, 1, true) < 0)
2313 gfc_error ("BYTE type used at %C "
2314 "is not available on the target machine");
2318 ts->type = BT_INTEGER;
2323 if (gfc_match (" integer") == MATCH_YES)
2325 ts->type = BT_INTEGER;
2326 ts->kind = gfc_default_integer_kind;
2330 if (gfc_match (" character") == MATCH_YES)
2332 ts->type = BT_CHARACTER;
2333 if (implicit_flag == 0)
2334 return gfc_match_char_spec (ts);
2339 if (gfc_match (" real") == MATCH_YES)
2342 ts->kind = gfc_default_real_kind;
2346 if (gfc_match (" double precision") == MATCH_YES)
2349 ts->kind = gfc_default_double_kind;
2353 if (gfc_match (" complex") == MATCH_YES)
2355 ts->type = BT_COMPLEX;
2356 ts->kind = gfc_default_complex_kind;
2360 if (gfc_match (" double complex") == MATCH_YES)
2362 if (gfc_notify_std (GFC_STD_GNU, "DOUBLE COMPLEX at %C does not "
2363 "conform to the Fortran 95 standard") == FAILURE)
2366 ts->type = BT_COMPLEX;
2367 ts->kind = gfc_default_double_kind;
2371 if (gfc_match (" logical") == MATCH_YES)
2373 ts->type = BT_LOGICAL;
2374 ts->kind = gfc_default_logical_kind;
2378 m = gfc_match (" type ( %n )", name);
2380 ts->type = BT_DERIVED;
2383 m = gfc_match (" class ( %n )", name);
2386 ts->type = BT_CLASS;
2388 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: CLASS statement at %C")
2393 /* Defer association of the derived type until the end of the
2394 specification block. However, if the derived type can be
2395 found, add it to the typespec. */
2396 if (gfc_matching_function)
2398 ts->u.derived = NULL;
2399 if (gfc_current_state () != COMP_INTERFACE
2400 && !gfc_find_symbol (name, NULL, 1, &sym) && sym)
2401 ts->u.derived = sym;
2405 /* Search for the name but allow the components to be defined later. If
2406 type = -1, this typespec has been seen in a function declaration but
2407 the type could not be accessed at that point. */
2409 if (ts->kind != -1 && gfc_get_ha_symbol (name, &sym))
2411 gfc_error ("Type name '%s' at %C is ambiguous", name);
2414 else if (ts->kind == -1)
2416 int iface = gfc_state_stack->previous->state != COMP_INTERFACE
2417 || gfc_current_ns->has_import_set;
2418 if (gfc_find_symbol (name, NULL, iface, &sym))
2420 gfc_error ("Type name '%s' at %C is ambiguous", name);
2429 if (sym->attr.flavor != FL_DERIVED
2430 && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE)
2433 gfc_set_sym_referenced (sym);
2434 ts->u.derived = sym;
2439 /* For all types except double, derived and character, look for an
2440 optional kind specifier. MATCH_NO is actually OK at this point. */
2441 if (implicit_flag == 1)
2444 if (gfc_current_form == FORM_FREE)
2446 c = gfc_peek_ascii_char ();
2447 if (!gfc_is_whitespace (c) && c != '*' && c != '('
2448 && c != ':' && c != ',')
2452 m = gfc_match_kind_spec (ts, false);
2453 if (m == MATCH_NO && ts->type != BT_CHARACTER)
2454 m = gfc_match_old_kind_spec (ts);
2456 /* Defer association of the KIND expression of function results
2457 until after USE and IMPORT statements. */
2458 if ((gfc_current_state () == COMP_NONE && gfc_error_flag_test ())
2459 || gfc_matching_function)
2463 m = MATCH_YES; /* No kind specifier found. */
2469 /* Match an IMPLICIT NONE statement. Actually, this statement is
2470 already matched in parse.c, or we would not end up here in the
2471 first place. So the only thing we need to check, is if there is
2472 trailing garbage. If not, the match is successful. */
2475 gfc_match_implicit_none (void)
2477 return (gfc_match_eos () == MATCH_YES) ? MATCH_YES : MATCH_NO;
2481 /* Match the letter range(s) of an IMPLICIT statement. */
2484 match_implicit_range (void)
2490 cur_loc = gfc_current_locus;
2492 gfc_gobble_whitespace ();
2493 c = gfc_next_ascii_char ();
2496 gfc_error ("Missing character range in IMPLICIT at %C");
2503 gfc_gobble_whitespace ();
2504 c1 = gfc_next_ascii_char ();
2508 gfc_gobble_whitespace ();
2509 c = gfc_next_ascii_char ();
2514 inner = 0; /* Fall through. */
2521 gfc_gobble_whitespace ();
2522 c2 = gfc_next_ascii_char ();
2526 gfc_gobble_whitespace ();
2527 c = gfc_next_ascii_char ();
2529 if ((c != ',') && (c != ')'))
2542 gfc_error ("Letters must be in alphabetic order in "
2543 "IMPLICIT statement at %C");
2547 /* See if we can add the newly matched range to the pending
2548 implicits from this IMPLICIT statement. We do not check for
2549 conflicts with whatever earlier IMPLICIT statements may have
2550 set. This is done when we've successfully finished matching
2552 if (gfc_add_new_implicit_range (c1, c2) != SUCCESS)
2559 gfc_syntax_error (ST_IMPLICIT);
2561 gfc_current_locus = cur_loc;
2566 /* Match an IMPLICIT statement, storing the types for
2567 gfc_set_implicit() if the statement is accepted by the parser.
2568 There is a strange looking, but legal syntactic construction
2569 possible. It looks like:
2571 IMPLICIT INTEGER (a-b) (c-d)
2573 This is legal if "a-b" is a constant expression that happens to
2574 equal one of the legal kinds for integers. The real problem
2575 happens with an implicit specification that looks like:
2577 IMPLICIT INTEGER (a-b)
2579 In this case, a typespec matcher that is "greedy" (as most of the
2580 matchers are) gobbles the character range as a kindspec, leaving
2581 nothing left. We therefore have to go a bit more slowly in the
2582 matching process by inhibiting the kindspec checking during
2583 typespec matching and checking for a kind later. */
2586 gfc_match_implicit (void)
2595 /* We don't allow empty implicit statements. */
2596 if (gfc_match_eos () == MATCH_YES)
2598 gfc_error ("Empty IMPLICIT statement at %C");
2604 /* First cleanup. */
2605 gfc_clear_new_implicit ();
2607 /* A basic type is mandatory here. */
2608 m = gfc_match_decl_type_spec (&ts, 1);
2609 if (m == MATCH_ERROR)
2614 cur_loc = gfc_current_locus;
2615 m = match_implicit_range ();
2619 /* We may have <TYPE> (<RANGE>). */
2620 gfc_gobble_whitespace ();
2621 c = gfc_next_ascii_char ();
2622 if ((c == '\n') || (c == ','))
2624 /* Check for CHARACTER with no length parameter. */
2625 if (ts.type == BT_CHARACTER && !ts.u.cl)
2627 ts.kind = gfc_default_character_kind;
2628 ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL);
2629 ts.u.cl->length = gfc_int_expr (1);
2632 /* Record the Successful match. */
2633 if (gfc_merge_new_implicit (&ts) != SUCCESS)
2638 gfc_current_locus = cur_loc;
2641 /* Discard the (incorrectly) matched range. */
2642 gfc_clear_new_implicit ();
2644 /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */
2645 if (ts.type == BT_CHARACTER)
2646 m = gfc_match_char_spec (&ts);
2649 m = gfc_match_kind_spec (&ts, false);
2652 m = gfc_match_old_kind_spec (&ts);
2653 if (m == MATCH_ERROR)
2659 if (m == MATCH_ERROR)
2662 m = match_implicit_range ();
2663 if (m == MATCH_ERROR)
2668 gfc_gobble_whitespace ();
2669 c = gfc_next_ascii_char ();
2670 if ((c != '\n') && (c != ','))
2673 if (gfc_merge_new_implicit (&ts) != SUCCESS)
2681 gfc_syntax_error (ST_IMPLICIT);
2689 gfc_match_import (void)
2691 char name[GFC_MAX_SYMBOL_LEN + 1];
2696 if (gfc_current_ns->proc_name == NULL
2697 || gfc_current_ns->proc_name->attr.if_source != IFSRC_IFBODY)
2699 gfc_error ("IMPORT statement at %C only permitted in "
2700 "an INTERFACE body");
2704 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IMPORT statement at %C")
2708 if (gfc_match_eos () == MATCH_YES)
2710 /* All host variables should be imported. */
2711 gfc_current_ns->has_import_set = 1;
2715 if (gfc_match (" ::") == MATCH_YES)
2717 if (gfc_match_eos () == MATCH_YES)
2719 gfc_error ("Expecting list of named entities at %C");
2726 m = gfc_match (" %n", name);
2730 if (gfc_current_ns->parent != NULL
2731 && gfc_find_symbol (name, gfc_current_ns->parent, 1, &sym))
2733 gfc_error ("Type name '%s' at %C is ambiguous", name);
2736 else if (gfc_current_ns->proc_name->ns->parent != NULL
2737 && gfc_find_symbol (name,
2738 gfc_current_ns->proc_name->ns->parent,
2741 gfc_error ("Type name '%s' at %C is ambiguous", name);
2747 gfc_error ("Cannot IMPORT '%s' from host scoping unit "
2748 "at %C - does not exist.", name);
2752 if (gfc_find_symtree (gfc_current_ns->sym_root,name))
2754 gfc_warning ("'%s' is already IMPORTed from host scoping unit "
2759 st = gfc_new_symtree (&gfc_current_ns->sym_root, sym->name);
2762 sym->attr.imported = 1;
2774 if (gfc_match_eos () == MATCH_YES)
2776 if (gfc_match_char (',') != MATCH_YES)
2783 gfc_error ("Syntax error in IMPORT statement at %C");
2788 /* A minimal implementation of gfc_match without whitespace, escape
2789 characters or variable arguments. Returns true if the next
2790 characters match the TARGET template exactly. */
2793 match_string_p (const char *target)
2797 for (p = target; *p; p++)
2798 if ((char) gfc_next_ascii_char () != *p)
2803 /* Matches an attribute specification including array specs. If
2804 successful, leaves the variables current_attr and current_as
2805 holding the specification. Also sets the colon_seen variable for
2806 later use by matchers associated with initializations.
2808 This subroutine is a little tricky in the sense that we don't know
2809 if we really have an attr-spec until we hit the double colon.
2810 Until that time, we can only return MATCH_NO. This forces us to
2811 check for duplicate specification at this level. */
2814 match_attr_spec (void)
2816 /* Modifiers that can exist in a type statement. */
2818 { GFC_DECL_BEGIN = 0,
2819 DECL_ALLOCATABLE = GFC_DECL_BEGIN, DECL_DIMENSION, DECL_EXTERNAL,
2820 DECL_IN, DECL_OUT, DECL_INOUT, DECL_INTRINSIC, DECL_OPTIONAL,
2821 DECL_PARAMETER, DECL_POINTER, DECL_PROTECTED, DECL_PRIVATE,
2822 DECL_PUBLIC, DECL_SAVE, DECL_TARGET, DECL_VALUE, DECL_VOLATILE,
2823 DECL_IS_BIND_C, DECL_ASYNCHRONOUS, DECL_NONE,
2824 GFC_DECL_END /* Sentinel */
2828 /* GFC_DECL_END is the sentinel, index starts at 0. */
2829 #define NUM_DECL GFC_DECL_END
2831 locus start, seen_at[NUM_DECL];
2838 gfc_clear_attr (¤t_attr);
2839 start = gfc_current_locus;
2844 /* See if we get all of the keywords up to the final double colon. */
2845 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
2853 gfc_gobble_whitespace ();
2855 ch = gfc_next_ascii_char ();
2858 /* This is the successful exit condition for the loop. */
2859 if (gfc_next_ascii_char () == ':')
2864 gfc_gobble_whitespace ();
2865 switch (gfc_peek_ascii_char ())
2868 gfc_next_ascii_char ();
2869 switch (gfc_next_ascii_char ())
2872 if (match_string_p ("locatable"))
2874 /* Matched "allocatable". */
2875 d = DECL_ALLOCATABLE;
2880 if (match_string_p ("ynchronous"))
2882 /* Matched "asynchronous". */
2883 d = DECL_ASYNCHRONOUS;
2889 /* Try and match the bind(c). */
2890 m = gfc_match_bind_c (NULL, true);
2893 else if (m == MATCH_ERROR)
2898 if (match_string_p ("dimension"))
2903 if (match_string_p ("external"))
2908 if (match_string_p ("int"))
2910 ch = gfc_next_ascii_char ();
2913 if (match_string_p ("nt"))
2915 /* Matched "intent". */
2916 /* TODO: Call match_intent_spec from here. */
2917 if (gfc_match (" ( in out )") == MATCH_YES)
2919 else if (gfc_match (" ( in )") == MATCH_YES)
2921 else if (gfc_match (" ( out )") == MATCH_YES)
2927 if (match_string_p ("insic"))
2929 /* Matched "intrinsic". */
2937 if (match_string_p ("optional"))
2942 gfc_next_ascii_char ();
2943 switch (gfc_next_ascii_char ())
2946 if (match_string_p ("rameter"))
2948 /* Matched "parameter". */
2954 if (match_string_p ("inter"))
2956 /* Matched "pointer". */
2962 ch = gfc_next_ascii_char ();
2965 if (match_string_p ("vate"))
2967 /* Matched "private". */
2973 if (match_string_p ("tected"))
2975 /* Matched "protected". */
2982 if (match_string_p ("blic"))
2984 /* Matched "public". */
2992 if (match_string_p ("save"))
2997 if (match_string_p ("target"))
3002 gfc_next_ascii_char ();
3003 ch = gfc_next_ascii_char ();
3006 if (match_string_p ("lue"))
3008 /* Matched "value". */
3014 if (match_string_p ("latile"))
3016 /* Matched "volatile". */
3024 /* No double colon and no recognizable decl_type, so assume that
3025 we've been looking at something else the whole time. */
3032 /* Check to make sure any parens are paired up correctly. */
3033 if (gfc_match_parens () == MATCH_ERROR)
3040 seen_at[d] = gfc_current_locus;
3042 if (d == DECL_DIMENSION)
3044 m = gfc_match_array_spec (¤t_as);
3048 gfc_error ("Missing dimension specification at %C");
3052 if (m == MATCH_ERROR)
3057 /* Since we've seen a double colon, we have to be looking at an
3058 attr-spec. This means that we can now issue errors. */
3059 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
3064 case DECL_ALLOCATABLE:
3065 attr = "ALLOCATABLE";
3067 case DECL_ASYNCHRONOUS:
3068 attr = "ASYNCHRONOUS";
3070 case DECL_DIMENSION:
3077 attr = "INTENT (IN)";
3080 attr = "INTENT (OUT)";
3083 attr = "INTENT (IN OUT)";
3085 case DECL_INTRINSIC:
3091 case DECL_PARAMETER:
3097 case DECL_PROTECTED:
3112 case DECL_IS_BIND_C:
3122 attr = NULL; /* This shouldn't happen. */
3125 gfc_error ("Duplicate %s attribute at %L", attr, &seen_at[d]);
3130 /* Now that we've dealt with duplicate attributes, add the attributes
3131 to the current attribute. */
3132 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
3137 if (gfc_current_state () == COMP_DERIVED
3138 && d != DECL_DIMENSION && d != DECL_POINTER
3139 && d != DECL_PRIVATE && d != DECL_PUBLIC
3142 if (d == DECL_ALLOCATABLE)
3144 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ALLOCATABLE "
3145 "attribute at %C in a TYPE definition")
3154 gfc_error ("Attribute at %L is not allowed in a TYPE definition",
3161 if ((d == DECL_PRIVATE || d == DECL_PUBLIC)
3162 && gfc_current_state () != COMP_MODULE)
3164 if (d == DECL_PRIVATE)
3168 if (gfc_current_state () == COMP_DERIVED
3169 && gfc_state_stack->previous
3170 && gfc_state_stack->previous->state == COMP_MODULE)
3172 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Attribute %s "
3173 "at %L in a TYPE definition", attr,
3183 gfc_error ("%s attribute at %L is not allowed outside of the "
3184 "specification part of a module", attr, &seen_at[d]);
3192 case DECL_ALLOCATABLE:
3193 t = gfc_add_allocatable (¤t_attr, &seen_at[d]);
3196 case DECL_ASYNCHRONOUS:
3197 if (gfc_notify_std (GFC_STD_F2003,
3198 "Fortran 2003: ASYNCHRONOUS attribute at %C")
3202 t = gfc_add_asynchronous (¤t_attr, NULL, &seen_at[d]);
3205 case DECL_DIMENSION:
3206 t = gfc_add_dimension (¤t_attr, NULL, &seen_at[d]);
3210 t = gfc_add_external (¤t_attr, &seen_at[d]);
3214 t = gfc_add_intent (¤t_attr, INTENT_IN, &seen_at[d]);
3218 t = gfc_add_intent (¤t_attr, INTENT_OUT, &seen_at[d]);
3222 t = gfc_add_intent (¤t_attr, INTENT_INOUT, &seen_at[d]);
3225 case DECL_INTRINSIC:
3226 t = gfc_add_intrinsic (¤t_attr, &seen_at[d]);
3230 t = gfc_add_optional (¤t_attr, &seen_at[d]);
3233 case DECL_PARAMETER:
3234 t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, &seen_at[d]);
3238 t = gfc_add_pointer (¤t_attr, &seen_at[d]);
3241 case DECL_PROTECTED:
3242 if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE)
3244 gfc_error ("PROTECTED at %C only allowed in specification "
3245 "part of a module");
3250 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED "
3255 t = gfc_add_protected (¤t_attr, NULL, &seen_at[d]);
3259 t = gfc_add_access (¤t_attr, ACCESS_PRIVATE, NULL,
3264 t = gfc_add_access (¤t_attr, ACCESS_PUBLIC, NULL,
3269 t = gfc_add_save (¤t_attr, NULL, &seen_at[d]);
3273 t = gfc_add_target (¤t_attr, &seen_at[d]);
3276 case DECL_IS_BIND_C:
3277 t = gfc_add_is_bind_c(¤t_attr, NULL, &seen_at[d], 0);
3281 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE attribute "
3286 t = gfc_add_value (¤t_attr, NULL, &seen_at[d]);
3290 if (gfc_notify_std (GFC_STD_F2003,
3291 "Fortran 2003: VOLATILE attribute at %C")
3295 t = gfc_add_volatile (¤t_attr, NULL, &seen_at[d]);
3299 gfc_internal_error ("match_attr_spec(): Bad attribute");
3313 gfc_current_locus = start;
3314 gfc_free_array_spec (current_as);
3320 /* Set the binding label, dest_label, either with the binding label
3321 stored in the given gfc_typespec, ts, or if none was provided, it
3322 will be the symbol name in all lower case, as required by the draft
3323 (J3/04-007, section 15.4.1). If a binding label was given and
3324 there is more than one argument (num_idents), it is an error. */
3327 set_binding_label (char *dest_label, const char *sym_name, int num_idents)
3329 if (num_idents > 1 && has_name_equals)
3331 gfc_error ("Multiple identifiers provided with "
3332 "single NAME= specifier at %C");
3336 if (curr_binding_label[0] != '\0')
3338 /* Binding label given; store in temp holder til have sym. */
3339 strcpy (dest_label, curr_binding_label);
3343 /* No binding label given, and the NAME= specifier did not exist,
3344 which means there was no NAME="". */
3345 if (sym_name != NULL && has_name_equals == 0)
3346 strcpy (dest_label, sym_name);
3353 /* Set the status of the given common block as being BIND(C) or not,
3354 depending on the given parameter, is_bind_c. */
3357 set_com_block_bind_c (gfc_common_head *com_block, int is_bind_c)
3359 com_block->is_bind_c = is_bind_c;
3364 /* Verify that the given gfc_typespec is for a C interoperable type. */
3367 verify_c_interop (gfc_typespec *ts)
3369 if (ts->type == BT_DERIVED && ts->u.derived != NULL)
3370 return (ts->u.derived->ts.is_c_interop ? SUCCESS : FAILURE);
3371 else if (ts->is_c_interop != 1)
3378 /* Verify that the variables of a given common block, which has been
3379 defined with the attribute specifier bind(c), to be of a C
3380 interoperable type. Errors will be reported here, if
3384 verify_com_block_vars_c_interop (gfc_common_head *com_block)
3386 gfc_symbol *curr_sym = NULL;
3387 gfc_try retval = SUCCESS;
3389 curr_sym = com_block->head;
3391 /* Make sure we have at least one symbol. */
3392 if (curr_sym == NULL)
3395 /* Here we know we have a symbol, so we'll execute this loop
3399 /* The second to last param, 1, says this is in a common block. */
3400 retval = verify_bind_c_sym (curr_sym, &(curr_sym->ts), 1, com_block);
3401 curr_sym = curr_sym->common_next;
3402 } while (curr_sym != NULL);
3408 /* Verify that a given BIND(C) symbol is C interoperable. If it is not,
3409 an appropriate error message is reported. */
3412 verify_bind_c_sym (gfc_symbol *tmp_sym, gfc_typespec *ts,
3413 int is_in_common, gfc_common_head *com_block)
3415 bool bind_c_function = false;
3416 gfc_try retval = SUCCESS;
3418 if (tmp_sym->attr.function && tmp_sym->attr.is_bind_c)
3419 bind_c_function = true;
3421 if (tmp_sym->attr.function && tmp_sym->result != NULL)
3423 tmp_sym = tmp_sym->result;
3424 /* Make sure it wasn't an implicitly typed result. */
3425 if (tmp_sym->attr.implicit_type)
3427 gfc_warning ("Implicitly declared BIND(C) function '%s' at "
3428 "%L may not be C interoperable", tmp_sym->name,
3429 &tmp_sym->declared_at);
3430 tmp_sym->ts.f90_type = tmp_sym->ts.type;
3431 /* Mark it as C interoperable to prevent duplicate warnings. */
3432 tmp_sym->ts.is_c_interop = 1;
3433 tmp_sym->attr.is_c_interop = 1;
3437 /* Here, we know we have the bind(c) attribute, so if we have
3438 enough type info, then verify that it's a C interop kind.
3439 The info could be in the symbol already, or possibly still in
3440 the given ts (current_ts), so look in both. */
3441 if (tmp_sym->ts.type != BT_UNKNOWN || ts->type != BT_UNKNOWN)
3443 if (verify_c_interop (&(tmp_sym->ts)) != SUCCESS)
3445 /* See if we're dealing with a sym in a common block or not. */
3446 if (is_in_common == 1)
3448 gfc_warning ("Variable '%s' in common block '%s' at %L "
3449 "may not be a C interoperable "
3450 "kind though common block '%s' is BIND(C)",
3451 tmp_sym->name, com_block->name,
3452 &(tmp_sym->declared_at), com_block->name);
3456 if (tmp_sym->ts.type == BT_DERIVED || ts->type == BT_DERIVED)
3457 gfc_error ("Type declaration '%s' at %L is not C "
3458 "interoperable but it is BIND(C)",
3459 tmp_sym->name, &(tmp_sym->declared_at));
3461 gfc_warning ("Variable '%s' at %L "
3462 "may not be a C interoperable "
3463 "kind but it is bind(c)",
3464 tmp_sym->name, &(tmp_sym->declared_at));
3468 /* Variables declared w/in a common block can't be bind(c)
3469 since there's no way for C to see these variables, so there's
3470 semantically no reason for the attribute. */
3471 if (is_in_common == 1 && tmp_sym->attr.is_bind_c == 1)
3473 gfc_error ("Variable '%s' in common block '%s' at "
3474 "%L cannot be declared with BIND(C) "
3475 "since it is not a global",
3476 tmp_sym->name, com_block->name,
3477 &(tmp_sym->declared_at));
3481 /* Scalar variables that are bind(c) can not have the pointer
3482 or allocatable attributes. */
3483 if (tmp_sym->attr.is_bind_c == 1)
3485 if (tmp_sym->attr.pointer == 1)
3487 gfc_error ("Variable '%s' at %L cannot have both the "
3488 "POINTER and BIND(C) attributes",
3489 tmp_sym->name, &(tmp_sym->declared_at));
3493 if (tmp_sym->attr.allocatable == 1)
3495 gfc_error ("Variable '%s' at %L cannot have both the "
3496 "ALLOCATABLE and BIND(C) attributes",
3497 tmp_sym->name, &(tmp_sym->declared_at));
3503 /* If it is a BIND(C) function, make sure the return value is a
3504 scalar value. The previous tests in this function made sure
3505 the type is interoperable. */
3506 if (bind_c_function && tmp_sym->as != NULL)
3507 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3508 "be an array", tmp_sym->name, &(tmp_sym->declared_at));
3510 /* BIND(C) functions can not return a character string. */
3511 if (bind_c_function && tmp_sym->ts.type == BT_CHARACTER)
3512 if (tmp_sym->ts.u.cl == NULL || tmp_sym->ts.u.cl->length == NULL
3513 || tmp_sym->ts.u.cl->length->expr_type != EXPR_CONSTANT
3514 || mpz_cmp_si (tmp_sym->ts.u.cl->length->value.integer, 1) != 0)
3515 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3516 "be a character string", tmp_sym->name,
3517 &(tmp_sym->declared_at));
3520 /* See if the symbol has been marked as private. If it has, make sure
3521 there is no binding label and warn the user if there is one. */
3522 if (tmp_sym->attr.access == ACCESS_PRIVATE
3523 && tmp_sym->binding_label[0] != '\0')
3524 /* Use gfc_warning_now because we won't say that the symbol fails
3525 just because of this. */
3526 gfc_warning_now ("Symbol '%s' at %L is marked PRIVATE but has been "
3527 "given the binding label '%s'", tmp_sym->name,
3528 &(tmp_sym->declared_at), tmp_sym->binding_label);
3534 /* Set the appropriate fields for a symbol that's been declared as
3535 BIND(C) (the is_bind_c flag and the binding label), and verify that
3536 the type is C interoperable. Errors are reported by the functions
3537 used to set/test these fields. */
3540 set_verify_bind_c_sym (gfc_symbol *tmp_sym, int num_idents)
3542 gfc_try retval = SUCCESS;
3544 /* TODO: Do we need to make sure the vars aren't marked private? */
3546 /* Set the is_bind_c bit in symbol_attribute. */
3547 gfc_add_is_bind_c (&(tmp_sym->attr), tmp_sym->name, &gfc_current_locus, 0);
3549 if (set_binding_label (tmp_sym->binding_label, tmp_sym->name,
3550 num_idents) != SUCCESS)
3557 /* Set the fields marking the given common block as BIND(C), including
3558 a binding label, and report any errors encountered. */
3561 set_verify_bind_c_com_block (gfc_common_head *com_block, int num_idents)
3563 gfc_try retval = SUCCESS;
3565 /* destLabel, common name, typespec (which may have binding label). */
3566 if (set_binding_label (com_block->binding_label, com_block->name, num_idents)
3570 /* Set the given common block (com_block) to being bind(c) (1). */
3571 set_com_block_bind_c (com_block, 1);
3577 /* Retrieve the list of one or more identifiers that the given bind(c)
3578 attribute applies to. */
3581 get_bind_c_idents (void)
3583 char name[GFC_MAX_SYMBOL_LEN + 1];
3585 gfc_symbol *tmp_sym = NULL;
3587 gfc_common_head *com_block = NULL;
3589 if (gfc_match_name (name) == MATCH_YES)
3591 found_id = MATCH_YES;
3592 gfc_get_ha_symbol (name, &tmp_sym);
3594 else if (match_common_name (name) == MATCH_YES)
3596 found_id = MATCH_YES;
3597 com_block = gfc_get_common (name, 0);
3601 gfc_error ("Need either entity or common block name for "
3602 "attribute specification statement at %C");
3606 /* Save the current identifier and look for more. */
3609 /* Increment the number of identifiers found for this spec stmt. */
3612 /* Make sure we have a sym or com block, and verify that it can
3613 be bind(c). Set the appropriate field(s) and look for more
3615 if (tmp_sym != NULL || com_block != NULL)
3617 if (tmp_sym != NULL)
3619 if (set_verify_bind_c_sym (tmp_sym, num_idents)
3625 if (set_verify_bind_c_com_block(com_block, num_idents)
3630 /* Look to see if we have another identifier. */
3632 if (gfc_match_eos () == MATCH_YES)
3633 found_id = MATCH_NO;
3634 else if (gfc_match_char (',') != MATCH_YES)
3635 found_id = MATCH_NO;
3636 else if (gfc_match_name (name) == MATCH_YES)
3638 found_id = MATCH_YES;
3639 gfc_get_ha_symbol (name, &tmp_sym);
3641 else if (match_common_name (name) == MATCH_YES)
3643 found_id = MATCH_YES;
3644 com_block = gfc_get_common (name, 0);
3648 gfc_error ("Missing entity or common block name for "
3649 "attribute specification statement at %C");
3655 gfc_internal_error ("Missing symbol");
3657 } while (found_id == MATCH_YES);
3659 /* if we get here we were successful */
3664 /* Try and match a BIND(C) attribute specification statement. */
3667 gfc_match_bind_c_stmt (void)
3669 match found_match = MATCH_NO;
3674 /* This may not be necessary. */
3676 /* Clear the temporary binding label holder. */
3677 curr_binding_label[0] = '\0';
3679 /* Look for the bind(c). */
3680 found_match = gfc_match_bind_c (NULL, true);
3682 if (found_match == MATCH_YES)
3684 /* Look for the :: now, but it is not required. */
3687 /* Get the identifier(s) that needs to be updated. This may need to
3688 change to hand the flag(s) for the attr specified so all identifiers
3689 found can have all appropriate parts updated (assuming that the same
3690 spec stmt can have multiple attrs, such as both bind(c) and
3692 if (get_bind_c_idents () != SUCCESS)
3693 /* Error message should have printed already. */
3701 /* Match a data declaration statement. */
3704 gfc_match_data_decl (void)
3710 num_idents_on_line = 0;
3712 m = gfc_match_decl_type_spec (¤t_ts, 0);
3716 if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS)
3717 && gfc_current_state () != COMP_DERIVED)
3719 sym = gfc_use_derived (current_ts.u.derived);
3727 current_ts.u.derived = sym;
3730 m = match_attr_spec ();
3731 if (m == MATCH_ERROR)
3737 if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS)
3738 && current_ts.u.derived->components == NULL
3739 && !current_ts.u.derived->attr.zero_comp)
3742 if (current_attr.pointer && gfc_current_state () == COMP_DERIVED)
3745 gfc_find_symbol (current_ts.u.derived->name,
3746 current_ts.u.derived->ns->parent, 1, &sym);
3748 /* Any symbol that we find had better be a type definition
3749 which has its components defined. */
3750 if (sym != NULL && sym->attr.flavor == FL_DERIVED
3751 && (current_ts.u.derived->components != NULL
3752 || current_ts.u.derived->attr.zero_comp))
3755 /* Now we have an error, which we signal, and then fix up
3756 because the knock-on is plain and simple confusing. */
3757 gfc_error_now ("Derived type at %C has not been previously defined "
3758 "and so cannot appear in a derived type definition");
3759 current_attr.pointer = 1;
3764 /* If we have an old-style character declaration, and no new-style
3765 attribute specifications, then there a comma is optional between
3766 the type specification and the variable list. */
3767 if (m == MATCH_NO && current_ts.type == BT_CHARACTER && old_char_selector)
3768 gfc_match_char (',');
3770 /* Give the types/attributes to symbols that follow. Give the element
3771 a number so that repeat character length expressions can be copied. */
3775 num_idents_on_line++;
3776 m = variable_decl (elem++);
3777 if (m == MATCH_ERROR)
3782 if (gfc_match_eos () == MATCH_YES)
3784 if (gfc_match_char (',') != MATCH_YES)
3788 if (gfc_error_flag_test () == 0)
3789 gfc_error ("Syntax error in data declaration at %C");
3792 gfc_free_data_all (gfc_current_ns);
3795 gfc_free_array_spec (current_as);
3801 /* Match a prefix associated with a function or subroutine
3802 declaration. If the typespec pointer is nonnull, then a typespec
3803 can be matched. Note that if nothing matches, MATCH_YES is
3804 returned (the null string was matched). */
3807 gfc_match_prefix (gfc_typespec *ts)
3811 gfc_clear_attr (¤t_attr);
3814 gcc_assert (!gfc_matching_prefix);
3815 gfc_matching_prefix = true;
3818 if (!seen_type && ts != NULL
3819 && gfc_match_decl_type_spec (ts, 0) == MATCH_YES
3820 && gfc_match_space () == MATCH_YES)
3827 if (gfc_match ("elemental% ") == MATCH_YES)
3829 if (gfc_add_elemental (¤t_attr, NULL) == FAILURE)
3835 if (gfc_match ("pure% ") == MATCH_YES)
3837 if (gfc_add_pure (¤t_attr, NULL) == FAILURE)
3843 if (gfc_match ("recursive% ") == MATCH_YES)
3845 if (gfc_add_recursive (¤t_attr, NULL) == FAILURE)
3851 /* At this point, the next item is not a prefix. */
3852 gcc_assert (gfc_matching_prefix);
3853 gfc_matching_prefix = false;
3857 gcc_assert (gfc_matching_prefix);
3858 gfc_matching_prefix = false;
3863 /* Copy attributes matched by gfc_match_prefix() to attributes on a symbol. */
3866 copy_prefix (symbol_attribute *dest, locus *where)
3868 if (current_attr.pure && gfc_add_pure (dest, where) == FAILURE)
3871 if (current_attr.elemental && gfc_add_elemental (dest, where) == FAILURE)
3874 if (current_attr.recursive && gfc_add_recursive (dest, where) == FAILURE)
3881 /* Match a formal argument list. */
3884 gfc_match_formal_arglist (gfc_symbol *progname, int st_flag, int null_flag)
3886 gfc_formal_arglist *head, *tail, *p, *q;
3887 char name[GFC_MAX_SYMBOL_LEN + 1];
3893 if (gfc_match_char ('(') != MATCH_YES)
3900 if (gfc_match_char (')') == MATCH_YES)
3905 if (gfc_match_char ('*') == MATCH_YES)
3909 m = gfc_match_name (name);
3913 if (gfc_get_symbol (name, NULL, &sym))
3917 p = gfc_get_formal_arglist ();
3929 /* We don't add the VARIABLE flavor because the name could be a
3930 dummy procedure. We don't apply these attributes to formal
3931 arguments of statement functions. */
3932 if (sym != NULL && !st_flag
3933 && (gfc_add_dummy (&sym->attr, sym->name, NULL) == FAILURE
3934 || gfc_missing_attr (&sym->attr, NULL) == FAILURE))
3940 /* The name of a program unit can be in a different namespace,
3941 so check for it explicitly. After the statement is accepted,
3942 the name is checked for especially in gfc_get_symbol(). */
3943 if (gfc_new_block != NULL && sym != NULL
3944 && strcmp (sym->name, gfc_new_block->name) == 0)
3946 gfc_error ("Name '%s' at %C is the name of the procedure",
3952 if (gfc_match_char (')') == MATCH_YES)
3955 m = gfc_match_char (',');
3958 gfc_error ("Unexpected junk in formal argument list at %C");
3964 /* Check for duplicate symbols in the formal argument list. */
3967 for (p = head; p->next; p = p->next)
3972 for (q = p->next; q; q = q->next)
3973 if (p->sym == q->sym)
3975 gfc_error ("Duplicate symbol '%s' in formal argument list "
3976 "at %C", p->sym->name);
3984 if (gfc_add_explicit_interface (progname, IFSRC_DECL, head, NULL)
3994 gfc_free_formal_arglist (head);
3999 /* Match a RESULT specification following a function declaration or
4000 ENTRY statement. Also matches the end-of-statement. */
4003 match_result (gfc_symbol *function, gfc_symbol **result)
4005 char name[GFC_MAX_SYMBOL_LEN + 1];
4009 if (gfc_match (" result (") != MATCH_YES)
4012 m = gfc_match_name (name);
4016 /* Get the right paren, and that's it because there could be the
4017 bind(c) attribute after the result clause. */
4018 if (gfc_match_char(')') != MATCH_YES)
4020 /* TODO: should report the missing right paren here. */
4024 if (strcmp (function->name, name) == 0)
4026 gfc_error ("RESULT variable at %C must be different than function name");
4030 if (gfc_get_symbol (name, NULL, &r))
4033 if (gfc_add_result (&r->attr, r->name, NULL) == FAILURE)
4042 /* Match a function suffix, which could be a combination of a result
4043 clause and BIND(C), either one, or neither. The draft does not
4044 require them to come in a specific order. */
4047 gfc_match_suffix (gfc_symbol *sym, gfc_symbol **result)
4049 match is_bind_c; /* Found bind(c). */
4050 match is_result; /* Found result clause. */
4051 match found_match; /* Status of whether we've found a good match. */
4052 char peek_char; /* Character we're going to peek at. */
4053 bool allow_binding_name;
4055 /* Initialize to having found nothing. */
4056 found_match = MATCH_NO;
4057 is_bind_c = MATCH_NO;
4058 is_result = MATCH_NO;
4060 /* Get the next char to narrow between result and bind(c). */
4061 gfc_gobble_whitespace ();
4062 peek_char = gfc_peek_ascii_char ();
4064 /* C binding names are not allowed for internal procedures. */
4065 if (gfc_current_state () == COMP_CONTAINS
4066 && sym->ns->proc_name->attr.flavor != FL_MODULE)
4067 allow_binding_name = false;
4069 allow_binding_name = true;
4074 /* Look for result clause. */
4075 is_result = match_result (sym, result);
4076 if (is_result == MATCH_YES)
4078 /* Now see if there is a bind(c) after it. */
4079 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
4080 /* We've found the result clause and possibly bind(c). */
4081 found_match = MATCH_YES;
4084 /* This should only be MATCH_ERROR. */
4085 found_match = is_result;
4088 /* Look for bind(c) first. */
4089 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
4090 if (is_bind_c == MATCH_YES)
4092 /* Now see if a result clause followed it. */
4093 is_result = match_result (sym, result);
4094 found_match = MATCH_YES;
4098 /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */
4099 found_match = MATCH_ERROR;
4103 gfc_error ("Unexpected junk after function declaration at %C");
4104 found_match = MATCH_ERROR;
4108 if (is_bind_c == MATCH_YES)
4110 /* Fortran 2008 draft allows BIND(C) for internal procedures. */
4111 if (gfc_current_state () == COMP_CONTAINS
4112 && sym->ns->proc_name->attr.flavor != FL_MODULE
4113 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute "
4114 "at %L may not be specified for an internal "
4115 "procedure", &gfc_current_locus)
4119 if (gfc_add_is_bind_c (&(sym->attr), sym->name, &gfc_current_locus, 1)
4128 /* Procedure pointer return value without RESULT statement:
4129 Add "hidden" result variable named "ppr@". */
4132 add_hidden_procptr_result (gfc_symbol *sym)
4136 if (gfc_notification_std (GFC_STD_F2003) == ERROR)
4139 /* First usage case: PROCEDURE and EXTERNAL statements. */
4140 case1 = gfc_current_state () == COMP_FUNCTION && gfc_current_block ()
4141 && strcmp (gfc_current_block ()->name, sym->name) == 0
4142 && sym->attr.external;
4143 /* Second usage case: INTERFACE statements. */
4144 case2 = gfc_current_state () == COMP_INTERFACE && gfc_state_stack->previous
4145 && gfc_state_stack->previous->state == COMP_FUNCTION
4146 && strcmp (gfc_state_stack->previous->sym->name, sym->name) == 0;
4152 gfc_get_sym_tree ("ppr@", gfc_current_ns, &stree, false);
4156 gfc_get_sym_tree ("ppr@", gfc_current_ns->parent, &stree, false);
4157 st2 = gfc_new_symtree (&gfc_current_ns->sym_root, "ppr@");
4158 st2->n.sym = stree->n.sym;
4160 sym->result = stree->n.sym;
4162 sym->result->attr.proc_pointer = sym->attr.proc_pointer;
4163 sym->result->attr.pointer = sym->attr.pointer;
4164 sym->result->attr.external = sym->attr.external;
4165 sym->result->attr.referenced = sym->attr.referenced;
4166 sym->result->ts = sym->ts;
4167 sym->attr.proc_pointer = 0;
4168 sym->attr.pointer = 0;
4169 sym->attr.external = 0;
4170 if (sym->result->attr.external && sym->result->attr.pointer)
4172 sym->result->attr.pointer = 0;
4173 sym->result->attr.proc_pointer = 1;
4176 return gfc_add_result (&sym->result->attr, sym->result->name, NULL);
4178 /* POINTER after PROCEDURE/EXTERNAL/INTERFACE statement. */
4179 else if (sym->attr.function && !sym->attr.external && sym->attr.pointer
4180 && sym->result && sym->result != sym && sym->result->attr.external
4181 && sym == gfc_current_ns->proc_name
4182 && sym == sym->result->ns->proc_name
4183 && strcmp ("ppr@", sym->result->name) == 0)
4185 sym->result->attr.proc_pointer = 1;
4186 sym->attr.pointer = 0;
4194 /* Match the interface for a PROCEDURE declaration,
4195 including brackets (R1212). */
4198 match_procedure_interface (gfc_symbol **proc_if)
4202 locus old_loc, entry_loc;
4203 gfc_namespace *old_ns = gfc_current_ns;
4204 char name[GFC_MAX_SYMBOL_LEN + 1];
4206 old_loc = entry_loc = gfc_current_locus;
4207 gfc_clear_ts (¤t_ts);
4209 if (gfc_match (" (") != MATCH_YES)
4211 gfc_current_locus = entry_loc;
4215 /* Get the type spec. for the procedure interface. */
4216 old_loc = gfc_current_locus;
4217 m = gfc_match_decl_type_spec (¤t_ts, 0);
4218 gfc_gobble_whitespace ();
4219 if (m == MATCH_YES || (m == MATCH_NO && gfc_peek_ascii_char () == ')'))
4222 if (m == MATCH_ERROR)
4225 /* Procedure interface is itself a procedure. */
4226 gfc_current_locus = old_loc;
4227 m = gfc_match_name (name);
4229 /* First look to see if it is already accessible in the current
4230 namespace because it is use associated or contained. */
4232 if (gfc_find_sym_tree (name, NULL, 0, &st))
4235 /* If it is still not found, then try the parent namespace, if it
4236 exists and create the symbol there if it is still not found. */
4237 if (gfc_current_ns->parent)
4238 gfc_current_ns = gfc_current_ns->parent;
4239 if (st == NULL && gfc_get_ha_sym_tree (name, &st))
4242 gfc_current_ns = old_ns;
4243 *proc_if = st->n.sym;
4245 /* Various interface checks. */
4249 /* Resolve interface if possible. That way, attr.procedure is only set
4250 if it is declared by a later procedure-declaration-stmt, which is
4251 invalid per C1212. */
4252 while ((*proc_if)->ts.interface)
4253 *proc_if = (*proc_if)->ts.interface;
4255 if ((*proc_if)->generic)
4257 gfc_error ("Interface '%s' at %C may not be generic",
4261 if ((*proc_if)->attr.proc == PROC_ST_FUNCTION)
4263 gfc_error ("Interface '%s' at %C may not be a statement function",
4267 /* Handle intrinsic procedures. */
4268 if (!((*proc_if)->attr.external || (*proc_if)->attr.use_assoc
4269 || (*proc_if)->attr.if_source == IFSRC_IFBODY)
4270 && (gfc_is_intrinsic ((*proc_if), 0, gfc_current_locus)
4271 || gfc_is_intrinsic ((*proc_if), 1, gfc_current_locus)))
4272 (*proc_if)->attr.intrinsic = 1;
4273 if ((*proc_if)->attr.intrinsic
4274 && !gfc_intrinsic_actual_ok ((*proc_if)->name, 0))
4276 gfc_error ("Intrinsic procedure '%s' not allowed "
4277 "in PROCEDURE statement at %C", (*proc_if)->name);
4283 if (gfc_match (" )") != MATCH_YES)
4285 gfc_current_locus = entry_loc;
4293 /* Match a PROCEDURE declaration (R1211). */
4296 match_procedure_decl (void)
4299 gfc_symbol *sym, *proc_if = NULL;
4301 gfc_expr *initializer = NULL;
4303 /* Parse interface (with brackets). */
4304 m = match_procedure_interface (&proc_if);
4308 /* Parse attributes (with colons). */
4309 m = match_attr_spec();
4310 if (m == MATCH_ERROR)
4313 /* Get procedure symbols. */
4316 m = gfc_match_symbol (&sym, 0);
4319 else if (m == MATCH_ERROR)
4322 /* Add current_attr to the symbol attributes. */
4323 if (gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE)
4326 if (sym->attr.is_bind_c)
4328 /* Check for C1218. */
4329 if (!proc_if || !proc_if->attr.is_bind_c)
4331 gfc_error ("BIND(C) attribute at %C requires "
4332 "an interface with BIND(C)");
4335 /* Check for C1217. */
4336 if (has_name_equals && sym->attr.pointer)
4338 gfc_error ("BIND(C) procedure with NAME may not have "
4339 "POINTER attribute at %C");
4342 if (has_name_equals && sym->attr.dummy)
4344 gfc_error ("Dummy procedure at %C may not have "
4345 "BIND(C) attribute with NAME");
4348 /* Set binding label for BIND(C). */
4349 if (set_binding_label (sym->binding_label, sym->name, num) != SUCCESS)
4353 if (gfc_add_external (&sym->attr, NULL) == FAILURE)
4356 if (add_hidden_procptr_result (sym) == SUCCESS)
4359 if (gfc_add_proc (&sym->attr, sym->name, NULL) == FAILURE)
4362 /* Set interface. */
4363 if (proc_if != NULL)
4365 if (sym->ts.type != BT_UNKNOWN)
4367 gfc_error ("Procedure '%s' at %L already has basic type of %s",
4368 sym->name, &gfc_current_locus,
4369 gfc_basic_typename (sym->ts.type));
4372 sym->ts.interface = proc_if;
4373 sym->attr.untyped = 1;
4374 sym->attr.if_source = IFSRC_IFBODY;
4376 else if (current_ts.type != BT_UNKNOWN)
4378 if (gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE)
4380 sym->ts.interface = gfc_new_symbol ("", gfc_current_ns);
4381 sym->ts.interface->ts = current_ts;
4382 sym->ts.interface->attr.function = 1;
4383 sym->attr.function = sym->ts.interface->attr.function;
4384 sym->attr.if_source = IFSRC_UNKNOWN;
4387 if (gfc_match (" =>") == MATCH_YES)
4389 if (!current_attr.pointer)
4391 gfc_error ("Initialization at %C isn't for a pointer variable");
4396 m = gfc_match_null (&initializer);
4399 gfc_error ("Pointer initialization requires a NULL() at %C");
4403 if (gfc_pure (NULL))
4405 gfc_error ("Initialization of pointer at %C is not allowed in "
4406 "a PURE procedure");
4413 if (add_init_expr_to_sym (sym->name, &initializer, &gfc_current_locus)
4419 gfc_set_sym_referenced (sym);
4421 if (gfc_match_eos () == MATCH_YES)
4423 if (gfc_match_char (',') != MATCH_YES)
4428 gfc_error ("Syntax error in PROCEDURE statement at %C");
4432 /* Free stuff up and return. */
4433 gfc_free_expr (initializer);
4439 match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc);
4442 /* Match a procedure pointer component declaration (R445). */
4445 match_ppc_decl (void)
4448 gfc_symbol *proc_if = NULL;
4452 gfc_expr *initializer = NULL;
4453 gfc_typebound_proc* tb;
4454 char name[GFC_MAX_SYMBOL_LEN + 1];
4456 /* Parse interface (with brackets). */
4457 m = match_procedure_interface (&proc_if);
4461 /* Parse attributes. */
4462 tb = XCNEW (gfc_typebound_proc);
4463 tb->where = gfc_current_locus;
4464 m = match_binding_attributes (tb, false, true);
4465 if (m == MATCH_ERROR)
4468 gfc_clear_attr (¤t_attr);
4469 current_attr.procedure = 1;
4470 current_attr.proc_pointer = 1;
4471 current_attr.access = tb->access;
4472 current_attr.flavor = FL_PROCEDURE;
4474 /* Match the colons (required). */
4475 if (gfc_match (" ::") != MATCH_YES)
4477 gfc_error ("Expected '::' after binding-attributes at %C");
4481 /* Check for C450. */
4482 if (!tb->nopass && proc_if == NULL)
4484 gfc_error("NOPASS or explicit interface required at %C");
4488 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Procedure pointer "
4489 "component at %C") == FAILURE)
4492 /* Match PPC names. */
4496 m = gfc_match_name (name);
4499 else if (m == MATCH_ERROR)
4502 if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE)
4505 /* Add current_attr to the symbol attributes. */
4506 if (gfc_copy_attr (&c->attr, ¤t_attr, NULL) == FAILURE)
4509 if (gfc_add_external (&c->attr, NULL) == FAILURE)
4512 if (gfc_add_proc (&c->attr, name, NULL) == FAILURE)
4517 /* Set interface. */
4518 if (proc_if != NULL)
4520 c->ts.interface = proc_if;
4521 c->attr.untyped = 1;
4522 c->attr.if_source = IFSRC_IFBODY;
4524 else if (ts.type != BT_UNKNOWN)
4527 c->ts.interface = gfc_new_symbol ("", gfc_current_ns);
4528 c->ts.interface->ts = ts;
4529 c->ts.interface->attr.function = 1;
4530 c->attr.function = c->ts.interface->attr.function;
4531 c->attr.if_source = IFSRC_UNKNOWN;
4534 if (gfc_match (" =>") == MATCH_YES)
4536 m = gfc_match_null (&initializer);
4539 gfc_error ("Pointer initialization requires a NULL() at %C");
4542 if (gfc_pure (NULL))
4544 gfc_error ("Initialization of pointer at %C is not allowed in "
4545 "a PURE procedure");
4550 gfc_free_expr (initializer);
4553 c->initializer = initializer;
4556 if (gfc_match_eos () == MATCH_YES)
4558 if (gfc_match_char (',') != MATCH_YES)
4563 gfc_error ("Syntax error in procedure pointer component at %C");
4568 /* Match a PROCEDURE declaration inside an interface (R1206). */
4571 match_procedure_in_interface (void)
4575 char name[GFC_MAX_SYMBOL_LEN + 1];
4577 if (current_interface.type == INTERFACE_NAMELESS
4578 || current_interface.type == INTERFACE_ABSTRACT)
4580 gfc_error ("PROCEDURE at %C must be in a generic interface");
4586 m = gfc_match_name (name);
4589 else if (m == MATCH_ERROR)
4591 if (gfc_get_symbol (name, gfc_current_ns->parent, &sym))
4594 if (gfc_add_interface (sym) == FAILURE)
4597 if (gfc_match_eos () == MATCH_YES)
4599 if (gfc_match_char (',') != MATCH_YES)
4606 gfc_error ("Syntax error in PROCEDURE statement at %C");
4611 /* General matcher for PROCEDURE declarations. */
4613 static match match_procedure_in_type (void);
4616 gfc_match_procedure (void)
4620 switch (gfc_current_state ())
4625 case COMP_SUBROUTINE:
4627 m = match_procedure_decl ();
4629 case COMP_INTERFACE:
4630 m = match_procedure_in_interface ();
4633 m = match_ppc_decl ();
4635 case COMP_DERIVED_CONTAINS:
4636 m = match_procedure_in_type ();
4645 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROCEDURE statement at %C")
4653 /* Warn if a matched procedure has the same name as an intrinsic; this is
4654 simply a wrapper around gfc_warn_intrinsic_shadow that interprets the current
4655 parser-state-stack to find out whether we're in a module. */
4658 warn_intrinsic_shadow (const gfc_symbol* sym, bool func)
4662 in_module = (gfc_state_stack->previous
4663 && gfc_state_stack->previous->state == COMP_MODULE);
4665 gfc_warn_intrinsic_shadow (sym, in_module, func);
4669 /* Match a function declaration. */
4672 gfc_match_function_decl (void)
4674 char name[GFC_MAX_SYMBOL_LEN + 1];
4675 gfc_symbol *sym, *result;
4679 match found_match; /* Status returned by match func. */
4681 if (gfc_current_state () != COMP_NONE
4682 && gfc_current_state () != COMP_INTERFACE
4683 && gfc_current_state () != COMP_CONTAINS)
4686 gfc_clear_ts (¤t_ts);
4688 old_loc = gfc_current_locus;
4690 m = gfc_match_prefix (¤t_ts);
4693 gfc_current_locus = old_loc;
4697 if (gfc_match ("function% %n", name) != MATCH_YES)
4699 gfc_current_locus = old_loc;
4702 if (get_proc_name (name, &sym, false))
4705 if (add_hidden_procptr_result (sym) == SUCCESS)
4708 gfc_new_block = sym;
4710 m = gfc_match_formal_arglist (sym, 0, 0);
4713 gfc_error ("Expected formal argument list in function "
4714 "definition at %C");
4718 else if (m == MATCH_ERROR)
4723 /* According to the draft, the bind(c) and result clause can
4724 come in either order after the formal_arg_list (i.e., either
4725 can be first, both can exist together or by themselves or neither
4726 one). Therefore, the match_result can't match the end of the
4727 string, and check for the bind(c) or result clause in either order. */
4728 found_match = gfc_match_eos ();
4730 /* Make sure that it isn't already declared as BIND(C). If it is, it
4731 must have been marked BIND(C) with a BIND(C) attribute and that is
4732 not allowed for procedures. */
4733 if (sym->attr.is_bind_c == 1)
4735 sym->attr.is_bind_c = 0;
4736 if (sym->old_symbol != NULL)
4737 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4738 "variables or common blocks",
4739 &(sym->old_symbol->declared_at));
4741 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4742 "variables or common blocks", &gfc_current_locus);
4745 if (found_match != MATCH_YES)
4747 /* If we haven't found the end-of-statement, look for a suffix. */
4748 suffix_match = gfc_match_suffix (sym, &result);
4749 if (suffix_match == MATCH_YES)
4750 /* Need to get the eos now. */
4751 found_match = gfc_match_eos ();
4753 found_match = suffix_match;
4756 if(found_match != MATCH_YES)
4760 /* Make changes to the symbol. */
4763 if (gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE)
4766 if (gfc_missing_attr (&sym->attr, NULL) == FAILURE
4767 || copy_prefix (&sym->attr, &sym->declared_at) == FAILURE)
4770 /* Delay matching the function characteristics until after the
4771 specification block by signalling kind=-1. */
4772 sym->declared_at = old_loc;
4773 if (current_ts.type != BT_UNKNOWN)
4774 current_ts.kind = -1;
4776 current_ts.kind = 0;
4780 if (current_ts.type != BT_UNKNOWN
4781 && gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE)
4787 if (current_ts.type != BT_UNKNOWN
4788 && gfc_add_type (result, ¤t_ts, &gfc_current_locus)
4791 sym->result = result;
4794 /* Warn if this procedure has the same name as an intrinsic. */
4795 warn_intrinsic_shadow (sym, true);
4801 gfc_current_locus = old_loc;
4806 /* This is mostly a copy of parse.c(add_global_procedure) but modified to
4807 pass the name of the entry, rather than the gfc_current_block name, and
4808 to return false upon finding an existing global entry. */
4811 add_global_entry (const char *name, int sub)
4814 enum gfc_symbol_type type;
4816 s = gfc_get_gsymbol(name);
4817 type = sub ? GSYM_SUBROUTINE : GSYM_FUNCTION;
4820 || (s->type != GSYM_UNKNOWN
4821 && s->type != type))
4822 gfc_global_used(s, NULL);
4826 s->where = gfc_current_locus;
4828 s->ns = gfc_current_ns;
4835 /* Match an ENTRY statement. */
4838 gfc_match_entry (void)
4843 char name[GFC_MAX_SYMBOL_LEN + 1];
4844 gfc_compile_state state;
4848 bool module_procedure;
4852 m = gfc_match_name (name);
4856 state = gfc_current_state ();
4857 if (state != COMP_SUBROUTINE && state != COMP_FUNCTION)
4862 gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM");
4865 gfc_error ("ENTRY statement at %C cannot appear within a MODULE");
4867 case COMP_BLOCK_DATA:
4868 gfc_error ("ENTRY statement at %C cannot appear within "
4871 case COMP_INTERFACE:
4872 gfc_error ("ENTRY statement at %C cannot appear within "
4876 gfc_error ("ENTRY statement at %C cannot appear within "
4877 "a DERIVED TYPE block");
4880 gfc_error ("ENTRY statement at %C cannot appear within "
4881 "an IF-THEN block");
4884 gfc_error ("ENTRY statement at %C cannot appear within "
4888 gfc_error ("ENTRY statement at %C cannot appear within "
4892 gfc_error ("ENTRY statement at %C cannot appear within "
4896 gfc_error ("ENTRY statement at %C cannot appear within "
4900 gfc_error ("ENTRY statement at %C cannot appear within "
4901 "a contained subprogram");
4904 gfc_internal_error ("gfc_match_entry(): Bad state");
4909 module_procedure = gfc_current_ns->parent != NULL
4910 && gfc_current_ns->parent->proc_name
4911 && gfc_current_ns->parent->proc_name->attr.flavor
4914 if (gfc_current_ns->parent != NULL
4915 && gfc_current_ns->parent->proc_name
4916 && !module_procedure)
4918 gfc_error("ENTRY statement at %C cannot appear in a "
4919 "contained procedure");
4923 /* Module function entries need special care in get_proc_name
4924 because previous references within the function will have
4925 created symbols attached to the current namespace. */
4926 if (get_proc_name (name, &entry,
4927 gfc_current_ns->parent != NULL
4928 && module_procedure))
4931 proc = gfc_current_block ();
4933 /* Make sure that it isn't already declared as BIND(C). If it is, it
4934 must have been marked BIND(C) with a BIND(C) attribute and that is
4935 not allowed for procedures. */
4936 if (entry->attr.is_bind_c == 1)
4938 entry->attr.is_bind_c = 0;
4939 if (entry->old_symbol != NULL)
4940 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4941 "variables or common blocks",
4942 &(entry->old_symbol->declared_at));
4944 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4945 "variables or common blocks", &gfc_current_locus);
4948 /* Check what next non-whitespace character is so we can tell if there
4949 is the required parens if we have a BIND(C). */
4950 gfc_gobble_whitespace ();
4951 peek_char = gfc_peek_ascii_char ();
4953 if (state == COMP_SUBROUTINE)
4955 /* An entry in a subroutine. */
4956 if (!gfc_current_ns->parent && !add_global_entry (name, 1))
4959 m = gfc_match_formal_arglist (entry, 0, 1);
4963 /* Call gfc_match_bind_c with allow_binding_name = true as ENTRY can
4964 never be an internal procedure. */
4965 is_bind_c = gfc_match_bind_c (entry, true);
4966 if (is_bind_c == MATCH_ERROR)
4968 if (is_bind_c == MATCH_YES)
4970 if (peek_char != '(')
4972 gfc_error ("Missing required parentheses before BIND(C) at %C");
4975 if (gfc_add_is_bind_c (&(entry->attr), entry->name, &(entry->declared_at), 1)
4980 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
4981 || gfc_add_subroutine (&entry->attr, entry->name, NULL) == FAILURE)
4986 /* An entry in a function.
4987 We need to take special care because writing
4992 ENTRY f() RESULT (r)
4994 ENTRY f RESULT (r). */
4995 if (!gfc_current_ns->parent && !add_global_entry (name, 0))
4998 old_loc = gfc_current_locus;
4999 if (gfc_match_eos () == MATCH_YES)
5001 gfc_current_locus = old_loc;
5002 /* Match the empty argument list, and add the interface to
5004 m = gfc_match_formal_arglist (entry, 0, 1);
5007 m = gfc_match_formal_arglist (entry, 0, 0);
5014 if (gfc_match_eos () == MATCH_YES)
5016 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
5017 || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE)
5020 entry->result = entry;
5024 m = gfc_match_suffix (entry, &result);
5026 gfc_syntax_error (ST_ENTRY);
5032 if (gfc_add_result (&result->attr, result->name, NULL) == FAILURE
5033 || gfc_add_entry (&entry->attr, result->name, NULL) == FAILURE
5034 || gfc_add_function (&entry->attr, result->name, NULL)
5037 entry->result = result;
5041 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
5042 || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE)
5044 entry->result = entry;
5049 if (gfc_match_eos () != MATCH_YES)
5051 gfc_syntax_error (ST_ENTRY);
5055 entry->attr.recursive = proc->attr.recursive;
5056 entry->attr.elemental = proc->attr.elemental;
5057 entry->attr.pure = proc->attr.pure;
5059 el = gfc_get_entry_list ();
5061 el->next = gfc_current_ns->entries;
5062 gfc_current_ns->entries = el;
5064 el->id = el->next->id + 1;
5068 new_st.op = EXEC_ENTRY;
5069 new_st.ext.entry = el;
5075 /* Match a subroutine statement, including optional prefixes. */
5078 gfc_match_subroutine (void)
5080 char name[GFC_MAX_SYMBOL_LEN + 1];
5085 bool allow_binding_name;
5087 if (gfc_current_state () != COMP_NONE
5088 && gfc_current_state () != COMP_INTERFACE
5089 && gfc_current_state () != COMP_CONTAINS)
5092 m = gfc_match_prefix (NULL);
5096 m = gfc_match ("subroutine% %n", name);
5100 if (get_proc_name (name, &sym, false))
5103 /* Set declared_at as it might point to, e.g., a PUBLIC statement, if
5104 the symbol existed before. */
5105 sym->declared_at = gfc_current_locus;
5107 if (add_hidden_procptr_result (sym) == SUCCESS)
5110 gfc_new_block = sym;
5112 /* Check what next non-whitespace character is so we can tell if there
5113 is the required parens if we have a BIND(C). */
5114 gfc_gobble_whitespace ();
5115 peek_char = gfc_peek_ascii_char ();
5117 if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE)
5120 if (gfc_match_formal_arglist (sym, 0, 1) != MATCH_YES)
5123 /* Make sure that it isn't already declared as BIND(C). If it is, it
5124 must have been marked BIND(C) with a BIND(C) attribute and that is
5125 not allowed for procedures. */
5126 if (sym->attr.is_bind_c == 1)
5128 sym->attr.is_bind_c = 0;
5129 if (sym->old_symbol != NULL)
5130 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5131 "variables or common blocks",
5132 &(sym->old_symbol->declared_at));
5134 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5135 "variables or common blocks", &gfc_current_locus);
5138 /* C binding names are not allowed for internal procedures. */
5139 if (gfc_current_state () == COMP_CONTAINS
5140 && sym->ns->proc_name->attr.flavor != FL_MODULE)
5141 allow_binding_name = false;
5143 allow_binding_name = true;
5145 /* Here, we are just checking if it has the bind(c) attribute, and if
5146 so, then we need to make sure it's all correct. If it doesn't,
5147 we still need to continue matching the rest of the subroutine line. */
5148 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
5149 if (is_bind_c == MATCH_ERROR)
5151 /* There was an attempt at the bind(c), but it was wrong. An
5152 error message should have been printed w/in the gfc_match_bind_c
5153 so here we'll just return the MATCH_ERROR. */
5157 if (is_bind_c == MATCH_YES)
5159 /* The following is allowed in the Fortran 2008 draft. */
5160 if (gfc_current_state () == COMP_CONTAINS
5161 && sym->ns->proc_name->attr.flavor != FL_MODULE
5162 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute "
5163 "at %L may not be specified for an internal "
5164 "procedure", &gfc_current_locus)
5168 if (peek_char != '(')
5170 gfc_error ("Missing required parentheses before BIND(C) at %C");
5173 if (gfc_add_is_bind_c (&(sym->attr), sym->name, &(sym->declared_at), 1)
5178 if (gfc_match_eos () != MATCH_YES)
5180 gfc_syntax_error (ST_SUBROUTINE);
5184 if (copy_prefix (&sym->attr, &sym->declared_at) == FAILURE)
5187 /* Warn if it has the same name as an intrinsic. */
5188 warn_intrinsic_shadow (sym, false);
5194 /* Match a BIND(C) specifier, with the optional 'name=' specifier if
5195 given, and set the binding label in either the given symbol (if not
5196 NULL), or in the current_ts. The symbol may be NULL because we may
5197 encounter the BIND(C) before the declaration itself. Return
5198 MATCH_NO if what we're looking at isn't a BIND(C) specifier,
5199 MATCH_ERROR if it is a BIND(C) clause but an error was encountered,
5200 or MATCH_YES if the specifier was correct and the binding label and
5201 bind(c) fields were set correctly for the given symbol or the
5202 current_ts. If allow_binding_name is false, no binding name may be
5206 gfc_match_bind_c (gfc_symbol *sym, bool allow_binding_name)
5208 /* binding label, if exists */
5209 char binding_label[GFC_MAX_SYMBOL_LEN + 1];
5213 /* Initialize the flag that specifies whether we encountered a NAME=
5214 specifier or not. */
5215 has_name_equals = 0;
5217 /* Init the first char to nil so we can catch if we don't have
5218 the label (name attr) or the symbol name yet. */
5219 binding_label[0] = '\0';
5221 /* This much we have to be able to match, in this order, if
5222 there is a bind(c) label. */
5223 if (gfc_match (" bind ( c ") != MATCH_YES)
5226 /* Now see if there is a binding label, or if we've reached the
5227 end of the bind(c) attribute without one. */
5228 if (gfc_match_char (',') == MATCH_YES)
5230 if (gfc_match (" name = ") != MATCH_YES)
5232 gfc_error ("Syntax error in NAME= specifier for binding label "
5234 /* should give an error message here */
5238 has_name_equals = 1;
5240 /* Get the opening quote. */
5241 double_quote = MATCH_YES;
5242 single_quote = MATCH_YES;
5243 double_quote = gfc_match_char ('"');
5244 if (double_quote != MATCH_YES)
5245 single_quote = gfc_match_char ('\'');
5246 if (double_quote != MATCH_YES && single_quote != MATCH_YES)
5248 gfc_error ("Syntax error in NAME= specifier for binding label "
5253 /* Grab the binding label, using functions that will not lower
5254 case the names automatically. */
5255 if (gfc_match_name_C (binding_label) != MATCH_YES)
5258 /* Get the closing quotation. */
5259 if (double_quote == MATCH_YES)
5261 if (gfc_match_char ('"') != MATCH_YES)
5263 gfc_error ("Missing closing quote '\"' for binding label at %C");
5264 /* User started string with '"' so looked to match it. */
5270 if (gfc_match_char ('\'') != MATCH_YES)
5272 gfc_error ("Missing closing quote '\'' for binding label at %C");
5273 /* User started string with "'" char. */
5279 /* Get the required right paren. */
5280 if (gfc_match_char (')') != MATCH_YES)
5282 gfc_error ("Missing closing paren for binding label at %C");
5286 if (has_name_equals && !allow_binding_name)
5288 gfc_error ("No binding name is allowed in BIND(C) at %C");
5292 if (has_name_equals && sym != NULL && sym->attr.dummy)
5294 gfc_error ("For dummy procedure %s, no binding name is "
5295 "allowed in BIND(C) at %C", sym->name);
5300 /* Save the binding label to the symbol. If sym is null, we're
5301 probably matching the typespec attributes of a declaration and
5302 haven't gotten the name yet, and therefore, no symbol yet. */
5303 if (binding_label[0] != '\0')
5307 strcpy (sym->binding_label, binding_label);
5310 strcpy (curr_binding_label, binding_label);
5312 else if (allow_binding_name)
5314 /* No binding label, but if symbol isn't null, we
5315 can set the label for it here.
5316 If name="" or allow_binding_name is false, no C binding name is
5318 if (sym != NULL && sym->name != NULL && has_name_equals == 0)
5319 strncpy (sym->binding_label, sym->name, strlen (sym->name) + 1);
5322 if (has_name_equals && gfc_current_state () == COMP_INTERFACE
5323 && current_interface.type == INTERFACE_ABSTRACT)
5325 gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C");
5333 /* Return nonzero if we're currently compiling a contained procedure. */
5336 contained_procedure (void)
5338 gfc_state_data *s = gfc_state_stack;
5340 if ((s->state == COMP_SUBROUTINE || s->state == COMP_FUNCTION)
5341 && s->previous != NULL && s->previous->state == COMP_CONTAINS)
5347 /* Set the kind of each enumerator. The kind is selected such that it is
5348 interoperable with the corresponding C enumeration type, making
5349 sure that -fshort-enums is honored. */
5354 enumerator_history *current_history = NULL;
5358 if (max_enum == NULL || enum_history == NULL)
5361 if (!flag_short_enums)
5367 kind = gfc_integer_kinds[i++].kind;
5369 while (kind < gfc_c_int_kind
5370 && gfc_check_integer_range (max_enum->initializer->value.integer,
5373 current_history = enum_history;
5374 while (current_history != NULL)
5376 current_history->sym->ts.kind = kind;
5377 current_history = current_history->next;
5382 /* Match any of the various end-block statements. Returns the type of
5383 END to the caller. The END INTERFACE, END IF, END DO, END SELECT
5384 and END BLOCK statements cannot be replaced by a single END statement. */
5387 gfc_match_end (gfc_statement *st)
5389 char name[GFC_MAX_SYMBOL_LEN + 1];
5390 gfc_compile_state state;
5392 const char *block_name;
5397 old_loc = gfc_current_locus;
5398 if (gfc_match ("end") != MATCH_YES)
5401 state = gfc_current_state ();
5402 block_name = gfc_current_block () == NULL
5403 ? NULL : gfc_current_block ()->name;
5405 if (state == COMP_BLOCK && !strcmp (block_name, "block@"))
5408 if (state == COMP_CONTAINS || state == COMP_DERIVED_CONTAINS)
5410 state = gfc_state_stack->previous->state;
5411 block_name = gfc_state_stack->previous->sym == NULL
5412 ? NULL : gfc_state_stack->previous->sym->name;
5419 *st = ST_END_PROGRAM;
5420 target = " program";
5424 case COMP_SUBROUTINE:
5425 *st = ST_END_SUBROUTINE;
5426 target = " subroutine";
5427 eos_ok = !contained_procedure ();
5431 *st = ST_END_FUNCTION;
5432 target = " function";
5433 eos_ok = !contained_procedure ();
5436 case COMP_BLOCK_DATA:
5437 *st = ST_END_BLOCK_DATA;
5438 target = " block data";
5443 *st = ST_END_MODULE;
5448 case COMP_INTERFACE:
5449 *st = ST_END_INTERFACE;
5450 target = " interface";
5455 case COMP_DERIVED_CONTAINS:
5480 *st = ST_END_CRITICAL;
5481 target = " critical";
5486 case COMP_SELECT_TYPE:
5487 *st = ST_END_SELECT;
5493 *st = ST_END_FORALL;
5508 last_initializer = NULL;
5510 gfc_free_enum_history ();
5514 gfc_error ("Unexpected END statement at %C");
5518 if (gfc_match_eos () == MATCH_YES)
5522 /* We would have required END [something]. */
5523 gfc_error ("%s statement expected at %L",
5524 gfc_ascii_statement (*st), &old_loc);
5531 /* Verify that we've got the sort of end-block that we're expecting. */
5532 if (gfc_match (target) != MATCH_YES)
5534 gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st));
5538 /* If we're at the end, make sure a block name wasn't required. */
5539 if (gfc_match_eos () == MATCH_YES)
5542 if (*st != ST_ENDDO && *st != ST_ENDIF && *st != ST_END_SELECT
5543 && *st != ST_END_FORALL && *st != ST_END_WHERE && *st != ST_END_BLOCK
5544 && *st != ST_END_CRITICAL)
5550 gfc_error ("Expected block name of '%s' in %s statement at %C",
5551 block_name, gfc_ascii_statement (*st));
5556 /* END INTERFACE has a special handler for its several possible endings. */
5557 if (*st == ST_END_INTERFACE)
5558 return gfc_match_end_interface ();
5560 /* We haven't hit the end of statement, so what is left must be an
5562 m = gfc_match_space ();
5564 m = gfc_match_name (name);
5567 gfc_error ("Expected terminating name at %C");
5571 if (block_name == NULL)
5574 if (strcmp (name, block_name) != 0 && strcmp (block_name, "ppr@") != 0)
5576 gfc_error ("Expected label '%s' for %s statement at %C", block_name,
5577 gfc_ascii_statement (*st));
5580 /* Procedure pointer as function result. */
5581 else if (strcmp (block_name, "ppr@") == 0
5582 && strcmp (name, gfc_current_block ()->ns->proc_name->name) != 0)
5584 gfc_error ("Expected label '%s' for %s statement at %C",
5585 gfc_current_block ()->ns->proc_name->name,
5586 gfc_ascii_statement (*st));
5590 if (gfc_match_eos () == MATCH_YES)
5594 gfc_syntax_error (*st);
5597 gfc_current_locus = old_loc;
5603 /***************** Attribute declaration statements ****************/
5605 /* Set the attribute of a single variable. */
5610 char name[GFC_MAX_SYMBOL_LEN + 1];
5618 m = gfc_match_name (name);
5622 if (find_special (name, &sym, false))
5625 var_locus = gfc_current_locus;
5627 /* Deal with possible array specification for certain attributes. */
5628 if (current_attr.dimension
5629 || current_attr.allocatable
5630 || current_attr.pointer
5631 || current_attr.target)
5633 m = gfc_match_array_spec (&as);
5634 if (m == MATCH_ERROR)
5637 if (current_attr.dimension && m == MATCH_NO)
5639 gfc_error ("Missing array specification at %L in DIMENSION "
5640 "statement", &var_locus);
5645 if (current_attr.dimension && sym->value)
5647 gfc_error ("Dimensions specified for %s at %L after its "
5648 "initialisation", sym->name, &var_locus);
5653 if ((current_attr.allocatable || current_attr.pointer)
5654 && (m == MATCH_YES) && (as->type != AS_DEFERRED))
5656 gfc_error ("Array specification must be deferred at %L", &var_locus);
5662 /* Update symbol table. DIMENSION attribute is set in
5663 gfc_set_array_spec(). For CLASS variables, this must be applied
5664 to the first component, or '$data' field. */
5665 if (sym->ts.type == BT_CLASS && sym->ts.u.derived)
5667 gfc_component *comp;
5668 comp = gfc_find_component (sym->ts.u.derived, "$data", true, true);
5669 if (comp == NULL || gfc_copy_attr (&comp->attr, ¤t_attr,
5670 &var_locus) == FAILURE)
5675 sym->attr.class_ok = (sym->attr.class_ok
5676 || current_attr.allocatable
5677 || current_attr.pointer);
5681 if (current_attr.dimension == 0
5682 && gfc_copy_attr (&sym->attr, ¤t_attr, &var_locus) == FAILURE)
5689 if (gfc_set_array_spec (sym, as, &var_locus) == FAILURE)
5695 if (sym->attr.cray_pointee && sym->as != NULL)
5697 /* Fix the array spec. */
5698 m = gfc_mod_pointee_as (sym->as);
5699 if (m == MATCH_ERROR)
5703 if (gfc_add_attribute (&sym->attr, &var_locus) == FAILURE)
5709 if ((current_attr.external || current_attr.intrinsic)
5710 && sym->attr.flavor != FL_PROCEDURE
5711 && gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL) == FAILURE)
5717 add_hidden_procptr_result (sym);
5722 gfc_free_array_spec (as);
5727 /* Generic attribute declaration subroutine. Used for attributes that
5728 just have a list of names. */
5735 /* Gobble the optional double colon, by simply ignoring the result
5745 if (gfc_match_eos () == MATCH_YES)
5751 if (gfc_match_char (',') != MATCH_YES)
5753 gfc_error ("Unexpected character in variable list at %C");
5763 /* This routine matches Cray Pointer declarations of the form:
5764 pointer ( <pointer>, <pointee> )
5766 pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ...
5767 The pointer, if already declared, should be an integer. Otherwise, we
5768 set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may
5769 be either a scalar, or an array declaration. No space is allocated for
5770 the pointee. For the statement
5771 pointer (ipt, ar(10))
5772 any subsequent uses of ar will be translated (in C-notation) as
5773 ar(i) => ((<type> *) ipt)(i)
5774 After gimplification, pointee variable will disappear in the code. */
5777 cray_pointer_decl (void)
5781 gfc_symbol *cptr; /* Pointer symbol. */
5782 gfc_symbol *cpte; /* Pointee symbol. */
5788 if (gfc_match_char ('(') != MATCH_YES)
5790 gfc_error ("Expected '(' at %C");
5794 /* Match pointer. */
5795 var_locus = gfc_current_locus;
5796 gfc_clear_attr (¤t_attr);
5797 gfc_add_cray_pointer (¤t_attr, &var_locus);
5798 current_ts.type = BT_INTEGER;
5799 current_ts.kind = gfc_index_integer_kind;
5801 m = gfc_match_symbol (&cptr, 0);
5804 gfc_error ("Expected variable name at %C");
5808 if (gfc_add_cray_pointer (&cptr->attr, &var_locus) == FAILURE)
5811 gfc_set_sym_referenced (cptr);
5813 if (cptr->ts.type == BT_UNKNOWN) /* Override the type, if necessary. */
5815 cptr->ts.type = BT_INTEGER;
5816 cptr->ts.kind = gfc_index_integer_kind;
5818 else if (cptr->ts.type != BT_INTEGER)
5820 gfc_error ("Cray pointer at %C must be an integer");
5823 else if (cptr->ts.kind < gfc_index_integer_kind)
5824 gfc_warning ("Cray pointer at %C has %d bytes of precision;"
5825 " memory addresses require %d bytes",
5826 cptr->ts.kind, gfc_index_integer_kind);
5828 if (gfc_match_char (',') != MATCH_YES)
5830 gfc_error ("Expected \",\" at %C");
5834 /* Match Pointee. */
5835 var_locus = gfc_current_locus;
5836 gfc_clear_attr (¤t_attr);
5837 gfc_add_cray_pointee (¤t_attr, &var_locus);
5838 current_ts.type = BT_UNKNOWN;
5839 current_ts.kind = 0;
5841 m = gfc_match_symbol (&cpte, 0);
5844 gfc_error ("Expected variable name at %C");
5848 /* Check for an optional array spec. */
5849 m = gfc_match_array_spec (&as);
5850 if (m == MATCH_ERROR)
5852 gfc_free_array_spec (as);
5855 else if (m == MATCH_NO)
5857 gfc_free_array_spec (as);
5861 if (gfc_add_cray_pointee (&cpte->attr, &var_locus) == FAILURE)
5864 gfc_set_sym_referenced (cpte);
5866 if (cpte->as == NULL)
5868 if (gfc_set_array_spec (cpte, as, &var_locus) == FAILURE)
5869 gfc_internal_error ("Couldn't set Cray pointee array spec.");
5871 else if (as != NULL)
5873 gfc_error ("Duplicate array spec for Cray pointee at %C");
5874 gfc_free_array_spec (as);
5880 if (cpte->as != NULL)
5882 /* Fix array spec. */
5883 m = gfc_mod_pointee_as (cpte->as);
5884 if (m == MATCH_ERROR)
5888 /* Point the Pointee at the Pointer. */
5889 cpte->cp_pointer = cptr;
5891 if (gfc_match_char (')') != MATCH_YES)
5893 gfc_error ("Expected \")\" at %C");
5896 m = gfc_match_char (',');
5898 done = true; /* Stop searching for more declarations. */
5902 if (m == MATCH_ERROR /* Failed when trying to find ',' above. */
5903 || gfc_match_eos () != MATCH_YES)
5905 gfc_error ("Expected \",\" or end of statement at %C");
5913 gfc_match_external (void)
5916 gfc_clear_attr (¤t_attr);
5917 current_attr.external = 1;
5919 return attr_decl ();
5924 gfc_match_intent (void)
5928 /* This is not allowed within a BLOCK construct! */
5929 if (gfc_current_state () == COMP_BLOCK)
5931 gfc_error ("INTENT is not allowed inside of BLOCK at %C");
5935 intent = match_intent_spec ();
5936 if (intent == INTENT_UNKNOWN)
5939 gfc_clear_attr (¤t_attr);
5940 current_attr.intent = intent;
5942 return attr_decl ();
5947 gfc_match_intrinsic (void)
5950 gfc_clear_attr (¤t_attr);
5951 current_attr.intrinsic = 1;
5953 return attr_decl ();
5958 gfc_match_optional (void)
5960 /* This is not allowed within a BLOCK construct! */
5961 if (gfc_current_state () == COMP_BLOCK)
5963 gfc_error ("OPTIONAL is not allowed inside of BLOCK at %C");
5967 gfc_clear_attr (¤t_attr);
5968 current_attr.optional = 1;
5970 return attr_decl ();
5975 gfc_match_pointer (void)
5977 gfc_gobble_whitespace ();
5978 if (gfc_peek_ascii_char () == '(')
5980 if (!gfc_option.flag_cray_pointer)
5982 gfc_error ("Cray pointer declaration at %C requires -fcray-pointer "
5986 return cray_pointer_decl ();
5990 gfc_clear_attr (¤t_attr);
5991 current_attr.pointer = 1;
5993 return attr_decl ();
5999 gfc_match_allocatable (void)
6001 gfc_clear_attr (¤t_attr);
6002 current_attr.allocatable = 1;
6004 return attr_decl ();
6009 gfc_match_dimension (void)
6011 gfc_clear_attr (¤t_attr);
6012 current_attr.dimension = 1;
6014 return attr_decl ();
6019 gfc_match_target (void)
6021 gfc_clear_attr (¤t_attr);
6022 current_attr.target = 1;
6024 return attr_decl ();
6028 /* Match the list of entities being specified in a PUBLIC or PRIVATE
6032 access_attr_decl (gfc_statement st)
6034 char name[GFC_MAX_SYMBOL_LEN + 1];
6035 interface_type type;
6038 gfc_intrinsic_op op;
6041 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6046 m = gfc_match_generic_spec (&type, name, &op);
6049 if (m == MATCH_ERROR)
6054 case INTERFACE_NAMELESS:
6055 case INTERFACE_ABSTRACT:
6058 case INTERFACE_GENERIC:
6059 if (gfc_get_symbol (name, NULL, &sym))
6062 if (gfc_add_access (&sym->attr, (st == ST_PUBLIC)
6063 ? ACCESS_PUBLIC : ACCESS_PRIVATE,
6064 sym->name, NULL) == FAILURE)
6069 case INTERFACE_INTRINSIC_OP:
6070 if (gfc_current_ns->operator_access[op] == ACCESS_UNKNOWN)
6072 gfc_current_ns->operator_access[op] =
6073 (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE;
6077 gfc_error ("Access specification of the %s operator at %C has "
6078 "already been specified", gfc_op2string (op));
6084 case INTERFACE_USER_OP:
6085 uop = gfc_get_uop (name);
6087 if (uop->access == ACCESS_UNKNOWN)
6089 uop->access = (st == ST_PUBLIC)
6090 ? ACCESS_PUBLIC : ACCESS_PRIVATE;
6094 gfc_error ("Access specification of the .%s. operator at %C "
6095 "has already been specified", sym->name);
6102 if (gfc_match_char (',') == MATCH_NO)
6106 if (gfc_match_eos () != MATCH_YES)
6111 gfc_syntax_error (st);
6119 gfc_match_protected (void)
6124 if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE)
6126 gfc_error ("PROTECTED at %C only allowed in specification "
6127 "part of a module");
6132 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED statement at %C")
6136 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6141 if (gfc_match_eos () == MATCH_YES)
6146 m = gfc_match_symbol (&sym, 0);
6150 if (gfc_add_protected (&sym->attr, sym->name, &gfc_current_locus)
6163 if (gfc_match_eos () == MATCH_YES)
6165 if (gfc_match_char (',') != MATCH_YES)
6172 gfc_error ("Syntax error in PROTECTED statement at %C");
6177 /* The PRIVATE statement is a bit weird in that it can be an attribute
6178 declaration, but also works as a standalone statement inside of a
6179 type declaration or a module. */
6182 gfc_match_private (gfc_statement *st)
6185 if (gfc_match ("private") != MATCH_YES)
6188 if (gfc_current_state () != COMP_MODULE
6189 && !(gfc_current_state () == COMP_DERIVED
6190 && gfc_state_stack->previous
6191 && gfc_state_stack->previous->state == COMP_MODULE)
6192 && !(gfc_current_state () == COMP_DERIVED_CONTAINS
6193 && gfc_state_stack->previous && gfc_state_stack->previous->previous
6194 && gfc_state_stack->previous->previous->state == COMP_MODULE))
6196 gfc_error ("PRIVATE statement at %C is only allowed in the "
6197 "specification part of a module");
6201 if (gfc_current_state () == COMP_DERIVED)
6203 if (gfc_match_eos () == MATCH_YES)
6209 gfc_syntax_error (ST_PRIVATE);
6213 if (gfc_match_eos () == MATCH_YES)
6220 return access_attr_decl (ST_PRIVATE);
6225 gfc_match_public (gfc_statement *st)
6228 if (gfc_match ("public") != MATCH_YES)
6231 if (gfc_current_state () != COMP_MODULE)
6233 gfc_error ("PUBLIC statement at %C is only allowed in the "
6234 "specification part of a module");
6238 if (gfc_match_eos () == MATCH_YES)
6245 return access_attr_decl (ST_PUBLIC);
6249 /* Workhorse for gfc_match_parameter. */
6259 m = gfc_match_symbol (&sym, 0);
6261 gfc_error ("Expected variable name at %C in PARAMETER statement");
6266 if (gfc_match_char ('=') == MATCH_NO)
6268 gfc_error ("Expected = sign in PARAMETER statement at %C");
6272 m = gfc_match_init_expr (&init);
6274 gfc_error ("Expected expression at %C in PARAMETER statement");
6278 if (sym->ts.type == BT_UNKNOWN
6279 && gfc_set_default_type (sym, 1, NULL) == FAILURE)
6285 if (gfc_check_assign_symbol (sym, init) == FAILURE
6286 || gfc_add_flavor (&sym->attr, FL_PARAMETER, sym->name, NULL) == FAILURE)
6294 gfc_error ("Initializing already initialized variable at %C");
6299 t = add_init_expr_to_sym (sym->name, &init, &gfc_current_locus);
6300 return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR;
6303 gfc_free_expr (init);
6308 /* Match a parameter statement, with the weird syntax that these have. */
6311 gfc_match_parameter (void)
6315 if (gfc_match_char ('(') == MATCH_NO)
6324 if (gfc_match (" )%t") == MATCH_YES)
6327 if (gfc_match_char (',') != MATCH_YES)
6329 gfc_error ("Unexpected characters in PARAMETER statement at %C");
6339 /* Save statements have a special syntax. */
6342 gfc_match_save (void)
6344 char n[GFC_MAX_SYMBOL_LEN+1];
6349 if (gfc_match_eos () == MATCH_YES)
6351 if (gfc_current_ns->seen_save)
6353 if (gfc_notify_std (GFC_STD_LEGACY, "Blanket SAVE statement at %C "
6354 "follows previous SAVE statement")
6359 gfc_current_ns->save_all = gfc_current_ns->seen_save = 1;
6363 if (gfc_current_ns->save_all)
6365 if (gfc_notify_std (GFC_STD_LEGACY, "SAVE statement at %C follows "
6366 "blanket SAVE statement")
6375 m = gfc_match_symbol (&sym, 0);
6379 if (gfc_add_save (&sym->attr, sym->name, &gfc_current_locus)
6391 m = gfc_match (" / %n /", &n);
6392 if (m == MATCH_ERROR)
6397 c = gfc_get_common (n, 0);
6400 gfc_current_ns->seen_save = 1;
6403 if (gfc_match_eos () == MATCH_YES)
6405 if (gfc_match_char (',') != MATCH_YES)
6412 gfc_error ("Syntax error in SAVE statement at %C");
6418 gfc_match_value (void)
6423 /* This is not allowed within a BLOCK construct! */
6424 if (gfc_current_state () == COMP_BLOCK)
6426 gfc_error ("VALUE is not allowed inside of BLOCK at %C");
6430 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE statement at %C")
6434 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6439 if (gfc_match_eos () == MATCH_YES)
6444 m = gfc_match_symbol (&sym, 0);
6448 if (gfc_add_value (&sym->attr, sym->name, &gfc_current_locus)
6461 if (gfc_match_eos () == MATCH_YES)
6463 if (gfc_match_char (',') != MATCH_YES)
6470 gfc_error ("Syntax error in VALUE statement at %C");
6476 gfc_match_volatile (void)
6481 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VOLATILE statement at %C")
6485 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6490 if (gfc_match_eos () == MATCH_YES)
6495 /* VOLATILE is special because it can be added to host-associated
6497 m = gfc_match_symbol (&sym, 1);
6501 if (gfc_add_volatile (&sym->attr, sym->name, &gfc_current_locus)
6514 if (gfc_match_eos () == MATCH_YES)
6516 if (gfc_match_char (',') != MATCH_YES)
6523 gfc_error ("Syntax error in VOLATILE statement at %C");
6529 gfc_match_asynchronous (void)
6534 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ASYNCHRONOUS statement at %C")
6538 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6543 if (gfc_match_eos () == MATCH_YES)
6548 /* ASYNCHRONOUS is special because it can be added to host-associated
6550 m = gfc_match_symbol (&sym, 1);
6554 if (gfc_add_asynchronous (&sym->attr, sym->name, &gfc_current_locus)
6567 if (gfc_match_eos () == MATCH_YES)
6569 if (gfc_match_char (',') != MATCH_YES)
6576 gfc_error ("Syntax error in ASYNCHRONOUS statement at %C");
6581 /* Match a module procedure statement. Note that we have to modify
6582 symbols in the parent's namespace because the current one was there
6583 to receive symbols that are in an interface's formal argument list. */
6586 gfc_match_modproc (void)
6588 char name[GFC_MAX_SYMBOL_LEN + 1];
6591 gfc_namespace *module_ns;
6592 gfc_interface *old_interface_head, *interface;
6594 if (gfc_state_stack->state != COMP_INTERFACE
6595 || gfc_state_stack->previous == NULL
6596 || current_interface.type == INTERFACE_NAMELESS
6597 || current_interface.type == INTERFACE_ABSTRACT)
6599 gfc_error ("MODULE PROCEDURE at %C must be in a generic module "
6604 module_ns = gfc_current_ns->parent;
6605 for (; module_ns; module_ns = module_ns->parent)
6606 if (module_ns->proc_name->attr.flavor == FL_MODULE
6607 || module_ns->proc_name->attr.flavor == FL_PROGRAM
6608 || (module_ns->proc_name->attr.flavor == FL_PROCEDURE
6609 && !module_ns->proc_name->attr.contained))
6612 if (module_ns == NULL)
6615 /* Store the current state of the interface. We will need it if we
6616 end up with a syntax error and need to recover. */
6617 old_interface_head = gfc_current_interface_head ();
6621 locus old_locus = gfc_current_locus;
6624 m = gfc_match_name (name);
6630 /* Check for syntax error before starting to add symbols to the
6631 current namespace. */
6632 if (gfc_match_eos () == MATCH_YES)
6634 if (!last && gfc_match_char (',') != MATCH_YES)
6637 /* Now we're sure the syntax is valid, we process this item
6639 if (gfc_get_symbol (name, module_ns, &sym))
6642 if (sym->attr.intrinsic)
6644 gfc_error ("Intrinsic procedure at %L cannot be a MODULE "
6645 "PROCEDURE", &old_locus);
6649 if (sym->attr.proc != PROC_MODULE
6650 && gfc_add_procedure (&sym->attr, PROC_MODULE,
6651 sym->name, NULL) == FAILURE)
6654 if (gfc_add_interface (sym) == FAILURE)
6657 sym->attr.mod_proc = 1;
6658 sym->declared_at = old_locus;
6667 /* Restore the previous state of the interface. */
6668 interface = gfc_current_interface_head ();
6669 gfc_set_current_interface_head (old_interface_head);
6671 /* Free the new interfaces. */
6672 while (interface != old_interface_head)
6674 gfc_interface *i = interface->next;
6675 gfc_free (interface);
6679 /* And issue a syntax error. */
6680 gfc_syntax_error (ST_MODULE_PROC);
6685 /* Check a derived type that is being extended. */
6687 check_extended_derived_type (char *name)
6689 gfc_symbol *extended;
6691 if (gfc_find_symbol (name, gfc_current_ns, 1, &extended))
6693 gfc_error ("Ambiguous symbol in TYPE definition at %C");
6699 gfc_error ("No such symbol in TYPE definition at %C");
6703 if (extended->attr.flavor != FL_DERIVED)
6705 gfc_error ("'%s' in EXTENDS expression at %C is not a "
6706 "derived type", name);
6710 if (extended->attr.is_bind_c)
6712 gfc_error ("'%s' cannot be extended at %C because it "
6713 "is BIND(C)", extended->name);
6717 if (extended->attr.sequence)
6719 gfc_error ("'%s' cannot be extended at %C because it "
6720 "is a SEQUENCE type", extended->name);
6728 /* Match the optional attribute specifiers for a type declaration.
6729 Return MATCH_ERROR if an error is encountered in one of the handled
6730 attributes (public, private, bind(c)), MATCH_NO if what's found is
6731 not a handled attribute, and MATCH_YES otherwise. TODO: More error
6732 checking on attribute conflicts needs to be done. */
6735 gfc_get_type_attr_spec (symbol_attribute *attr, char *name)
6737 /* See if the derived type is marked as private. */
6738 if (gfc_match (" , private") == MATCH_YES)
6740 if (gfc_current_state () != COMP_MODULE)
6742 gfc_error ("Derived type at %C can only be PRIVATE in the "
6743 "specification part of a module");
6747 if (gfc_add_access (attr, ACCESS_PRIVATE, NULL, NULL) == FAILURE)
6750 else if (gfc_match (" , public") == MATCH_YES)
6752 if (gfc_current_state () != COMP_MODULE)
6754 gfc_error ("Derived type at %C can only be PUBLIC in the "
6755 "specification part of a module");
6759 if (gfc_add_access (attr, ACCESS_PUBLIC, NULL, NULL) == FAILURE)
6762 else if (gfc_match (" , bind ( c )") == MATCH_YES)
6764 /* If the type is defined to be bind(c) it then needs to make
6765 sure that all fields are interoperable. This will
6766 need to be a semantic check on the finished derived type.
6767 See 15.2.3 (lines 9-12) of F2003 draft. */
6768 if (gfc_add_is_bind_c (attr, NULL, &gfc_current_locus, 0) != SUCCESS)
6771 /* TODO: attr conflicts need to be checked, probably in symbol.c. */
6773 else if (gfc_match (" , abstract") == MATCH_YES)
6775 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ABSTRACT type at %C")
6779 if (gfc_add_abstract (attr, &gfc_current_locus) == FAILURE)
6782 else if (name && gfc_match(" , extends ( %n )", name) == MATCH_YES)
6784 if (gfc_add_extension (attr, &gfc_current_locus) == FAILURE)
6790 /* If we get here, something matched. */
6795 /* Assign a hash value for a derived type. The algorithm is that of
6796 SDBM. The hashed string is '[module_name #] derived_name'. */
6798 hash_value (gfc_symbol *sym)
6800 unsigned int hash = 0;
6804 /* Hash of the module or procedure name. */
6805 if (sym->module != NULL)
6807 else if (sym->ns && sym->ns->proc_name
6808 && sym->ns->proc_name->attr.flavor == FL_MODULE)
6809 c = sym->ns->proc_name->name;
6816 for (i = 0; i < len; i++, c++)
6817 hash = (hash << 6) + (hash << 16) - hash + (*c);
6819 /* Disambiguate between 'a' in 'aa' and 'aa' in 'a'. */
6820 hash = (hash << 6) + (hash << 16) - hash + '#';
6823 /* Hash of the derived type name. */
6824 len = strlen (sym->name);
6826 for (i = 0; i < len; i++, c++)
6827 hash = (hash << 6) + (hash << 16) - hash + (*c);
6829 /* Return the hash but take the modulus for the sake of module read,
6830 even though this slightly increases the chance of collision. */
6831 return (hash % 100000000);
6835 /* Match the beginning of a derived type declaration. If a type name
6836 was the result of a function, then it is possible to have a symbol
6837 already to be known as a derived type yet have no components. */
6840 gfc_match_derived_decl (void)
6842 char name[GFC_MAX_SYMBOL_LEN + 1];
6843 char parent[GFC_MAX_SYMBOL_LEN + 1];
6844 symbol_attribute attr;
6846 gfc_symbol *extended;
6848 match is_type_attr_spec = MATCH_NO;
6849 bool seen_attr = false;
6851 if (gfc_current_state () == COMP_DERIVED)
6856 gfc_clear_attr (&attr);
6861 is_type_attr_spec = gfc_get_type_attr_spec (&attr, parent);
6862 if (is_type_attr_spec == MATCH_ERROR)
6864 if (is_type_attr_spec == MATCH_YES)
6866 } while (is_type_attr_spec == MATCH_YES);
6868 /* Deal with derived type extensions. The extension attribute has
6869 been added to 'attr' but now the parent type must be found and
6872 extended = check_extended_derived_type (parent);
6874 if (parent[0] && !extended)
6877 if (gfc_match (" ::") != MATCH_YES && seen_attr)
6879 gfc_error ("Expected :: in TYPE definition at %C");
6883 m = gfc_match (" %n%t", name);
6887 /* Make sure the name is not the name of an intrinsic type. */
6888 if (gfc_is_intrinsic_typename (name))
6890 gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic "
6895 if (gfc_get_symbol (name, NULL, &sym))
6898 if (sym->ts.type != BT_UNKNOWN)
6900 gfc_error ("Derived type name '%s' at %C already has a basic type "
6901 "of %s", sym->name, gfc_typename (&sym->ts));
6905 /* The symbol may already have the derived attribute without the
6906 components. The ways this can happen is via a function
6907 definition, an INTRINSIC statement or a subtype in another
6908 derived type that is a pointer. The first part of the AND clause
6909 is true if the symbol is not the return value of a function. */
6910 if (sym->attr.flavor != FL_DERIVED
6911 && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE)
6914 if (sym->components != NULL || sym->attr.zero_comp)
6916 gfc_error ("Derived type definition of '%s' at %C has already been "
6917 "defined", sym->name);
6921 if (attr.access != ACCESS_UNKNOWN
6922 && gfc_add_access (&sym->attr, attr.access, sym->name, NULL) == FAILURE)
6925 /* See if the derived type was labeled as bind(c). */
6926 if (attr.is_bind_c != 0)
6927 sym->attr.is_bind_c = attr.is_bind_c;
6929 /* Construct the f2k_derived namespace if it is not yet there. */
6930 if (!sym->f2k_derived)
6931 sym->f2k_derived = gfc_get_namespace (NULL, 0);
6933 if (extended && !sym->components)
6938 /* Add the extended derived type as the first component. */
6939 gfc_add_component (sym, parent, &p);
6941 gfc_set_sym_referenced (extended);
6943 p->ts.type = BT_DERIVED;
6944 p->ts.u.derived = extended;
6945 p->initializer = gfc_default_initializer (&p->ts);
6947 /* Set extension level. */
6948 if (extended->attr.extension == 255)
6950 /* Since the extension field is 8 bit wide, we can only have
6951 up to 255 extension levels. */
6952 gfc_error ("Maximum extension level reached with type '%s' at %L",
6953 extended->name, &extended->declared_at);
6956 sym->attr.extension = extended->attr.extension + 1;
6958 /* Provide the links between the extended type and its extension. */
6959 if (!extended->f2k_derived)
6960 extended->f2k_derived = gfc_get_namespace (NULL, 0);
6961 st = gfc_new_symtree (&extended->f2k_derived->sym_root, sym->name);
6965 if (!sym->hash_value)
6966 /* Set the hash for the compound name for this type. */
6967 sym->hash_value = hash_value (sym);
6969 /* Take over the ABSTRACT attribute. */
6970 sym->attr.abstract = attr.abstract;
6972 gfc_new_block = sym;
6978 /* Cray Pointees can be declared as:
6979 pointer (ipt, a (n,m,...,*)) */
6982 gfc_mod_pointee_as (gfc_array_spec *as)
6984 as->cray_pointee = true; /* This will be useful to know later. */
6985 if (as->type == AS_ASSUMED_SIZE)
6986 as->cp_was_assumed = true;
6987 else if (as->type == AS_ASSUMED_SHAPE)
6989 gfc_error ("Cray Pointee at %C cannot be assumed shape array");
6996 /* Match the enum definition statement, here we are trying to match
6997 the first line of enum definition statement.
6998 Returns MATCH_YES if match is found. */
7001 gfc_match_enum (void)
7005 m = gfc_match_eos ();
7009 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENUM and ENUMERATOR at %C")
7017 /* Returns an initializer whose value is one higher than the value of the
7018 LAST_INITIALIZER argument. If the argument is NULL, the
7019 initializers value will be set to zero. The initializer's kind
7020 will be set to gfc_c_int_kind.
7022 If -fshort-enums is given, the appropriate kind will be selected
7023 later after all enumerators have been parsed. A warning is issued
7024 here if an initializer exceeds gfc_c_int_kind. */
7027 enum_initializer (gfc_expr *last_initializer, locus where)
7031 result = gfc_get_expr ();
7032 result->expr_type = EXPR_CONSTANT;
7033 result->ts.type = BT_INTEGER;
7034 result->ts.kind = gfc_c_int_kind;
7035 result->where = where;
7037 mpz_init (result->value.integer);
7039 if (last_initializer != NULL)
7041 mpz_add_ui (result->value.integer, last_initializer->value.integer, 1);
7042 result->where = last_initializer->where;
7044 if (gfc_check_integer_range (result->value.integer,
7045 gfc_c_int_kind) != ARITH_OK)
7047 gfc_error ("Enumerator exceeds the C integer type at %C");
7053 /* Control comes here, if it's the very first enumerator and no
7054 initializer has been given. It will be initialized to zero. */
7055 mpz_set_si (result->value.integer, 0);
7062 /* Match a variable name with an optional initializer. When this
7063 subroutine is called, a variable is expected to be parsed next.
7064 Depending on what is happening at the moment, updates either the
7065 symbol table or the current interface. */
7068 enumerator_decl (void)
7070 char name[GFC_MAX_SYMBOL_LEN + 1];
7071 gfc_expr *initializer;
7072 gfc_array_spec *as = NULL;
7080 old_locus = gfc_current_locus;
7082 /* When we get here, we've just matched a list of attributes and
7083 maybe a type and a double colon. The next thing we expect to see
7084 is the name of the symbol. */
7085 m = gfc_match_name (name);
7089 var_locus = gfc_current_locus;
7091 /* OK, we've successfully matched the declaration. Now put the
7092 symbol in the current namespace. If we fail to create the symbol,
7094 if (build_sym (name, NULL, &as, &var_locus) == FAILURE)
7100 /* The double colon must be present in order to have initializers.
7101 Otherwise the statement is ambiguous with an assignment statement. */
7104 if (gfc_match_char ('=') == MATCH_YES)
7106 m = gfc_match_init_expr (&initializer);
7109 gfc_error ("Expected an initialization expression at %C");
7118 /* If we do not have an initializer, the initialization value of the
7119 previous enumerator (stored in last_initializer) is incremented
7120 by 1 and is used to initialize the current enumerator. */
7121 if (initializer == NULL)
7122 initializer = enum_initializer (last_initializer, old_locus);
7124 if (initializer == NULL || initializer->ts.type != BT_INTEGER)
7126 gfc_error ("ENUMERATOR %L not initialized with integer expression",
7132 /* Store this current initializer, for the next enumerator variable
7133 to be parsed. add_init_expr_to_sym() zeros initializer, so we
7134 use last_initializer below. */
7135 last_initializer = initializer;
7136 t = add_init_expr_to_sym (name, &initializer, &var_locus);
7138 /* Maintain enumerator history. */
7139 gfc_find_symbol (name, NULL, 0, &sym);
7140 create_enum_history (sym, last_initializer);
7142 return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR;
7145 /* Free stuff up and return. */
7146 gfc_free_expr (initializer);
7152 /* Match the enumerator definition statement. */
7155 gfc_match_enumerator_def (void)
7160 gfc_clear_ts (¤t_ts);
7162 m = gfc_match (" enumerator");
7166 m = gfc_match (" :: ");
7167 if (m == MATCH_ERROR)
7170 colon_seen = (m == MATCH_YES);
7172 if (gfc_current_state () != COMP_ENUM)
7174 gfc_error ("ENUM definition statement expected before %C");
7175 gfc_free_enum_history ();
7179 (¤t_ts)->type = BT_INTEGER;
7180 (¤t_ts)->kind = gfc_c_int_kind;
7182 gfc_clear_attr (¤t_attr);
7183 t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, NULL);
7192 m = enumerator_decl ();
7193 if (m == MATCH_ERROR)
7195 gfc_free_enum_history ();
7201 if (gfc_match_eos () == MATCH_YES)
7203 if (gfc_match_char (',') != MATCH_YES)
7207 if (gfc_current_state () == COMP_ENUM)
7209 gfc_free_enum_history ();
7210 gfc_error ("Syntax error in ENUMERATOR definition at %C");
7215 gfc_free_array_spec (current_as);
7222 /* Match binding attributes. */
7225 match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc)
7227 bool found_passing = false;
7228 bool seen_ptr = false;
7229 match m = MATCH_YES;
7231 /* Intialize to defaults. Do so even before the MATCH_NO check so that in
7232 this case the defaults are in there. */
7233 ba->access = ACCESS_UNKNOWN;
7234 ba->pass_arg = NULL;
7235 ba->pass_arg_num = 0;
7237 ba->non_overridable = 0;
7241 /* If we find a comma, we believe there are binding attributes. */
7242 m = gfc_match_char (',');
7248 /* Access specifier. */
7250 m = gfc_match (" public");
7251 if (m == MATCH_ERROR)
7255 if (ba->access != ACCESS_UNKNOWN)
7257 gfc_error ("Duplicate access-specifier at %C");
7261 ba->access = ACCESS_PUBLIC;
7265 m = gfc_match (" private");
7266 if (m == MATCH_ERROR)
7270 if (ba->access != ACCESS_UNKNOWN)
7272 gfc_error ("Duplicate access-specifier at %C");
7276 ba->access = ACCESS_PRIVATE;
7280 /* If inside GENERIC, the following is not allowed. */
7285 m = gfc_match (" nopass");
7286 if (m == MATCH_ERROR)
7292 gfc_error ("Binding attributes already specify passing,"
7293 " illegal NOPASS at %C");
7297 found_passing = true;
7302 /* PASS possibly including argument. */
7303 m = gfc_match (" pass");
7304 if (m == MATCH_ERROR)
7308 char arg[GFC_MAX_SYMBOL_LEN + 1];
7312 gfc_error ("Binding attributes already specify passing,"
7313 " illegal PASS at %C");
7317 m = gfc_match (" ( %n )", arg);
7318 if (m == MATCH_ERROR)
7321 ba->pass_arg = gfc_get_string (arg);
7322 gcc_assert ((m == MATCH_YES) == (ba->pass_arg != NULL));
7324 found_passing = true;
7332 m = gfc_match (" pointer");
7333 if (m == MATCH_ERROR)
7339 gfc_error ("Duplicate POINTER attribute at %C");
7349 /* NON_OVERRIDABLE flag. */
7350 m = gfc_match (" non_overridable");
7351 if (m == MATCH_ERROR)
7355 if (ba->non_overridable)
7357 gfc_error ("Duplicate NON_OVERRIDABLE at %C");
7361 ba->non_overridable = 1;
7365 /* DEFERRED flag. */
7366 m = gfc_match (" deferred");
7367 if (m == MATCH_ERROR)
7373 gfc_error ("Duplicate DEFERRED at %C");
7384 /* Nothing matching found. */
7386 gfc_error ("Expected access-specifier at %C");
7388 gfc_error ("Expected binding attribute at %C");
7391 while (gfc_match_char (',') == MATCH_YES);
7393 /* NON_OVERRIDABLE and DEFERRED exclude themselves. */
7394 if (ba->non_overridable && ba->deferred)
7396 gfc_error ("NON_OVERRIDABLE and DEFERRED can't both appear at %C");
7403 if (ba->access == ACCESS_UNKNOWN)
7404 ba->access = gfc_typebound_default_access;
7406 if (ppc && !seen_ptr)
7408 gfc_error ("POINTER attribute is required for procedure pointer component"
7420 /* Match a PROCEDURE specific binding inside a derived type. */
7423 match_procedure_in_type (void)
7425 char name[GFC_MAX_SYMBOL_LEN + 1];
7426 char target_buf[GFC_MAX_SYMBOL_LEN + 1];
7427 char* target = NULL;
7428 gfc_typebound_proc* tb;
7436 /* Check current state. */
7437 gcc_assert (gfc_state_stack->state == COMP_DERIVED_CONTAINS);
7438 block = gfc_state_stack->previous->sym;
7441 /* Try to match PROCEDURE(interface). */
7442 if (gfc_match (" (") == MATCH_YES)
7444 m = gfc_match_name (target_buf);
7445 if (m == MATCH_ERROR)
7449 gfc_error ("Interface-name expected after '(' at %C");
7453 if (gfc_match (" )") != MATCH_YES)
7455 gfc_error ("')' expected at %C");
7459 target = target_buf;
7462 /* Construct the data structure. */
7463 tb = gfc_get_typebound_proc ();
7464 tb->where = gfc_current_locus;
7467 /* Match binding attributes. */
7468 m = match_binding_attributes (tb, false, false);
7469 if (m == MATCH_ERROR)
7471 seen_attrs = (m == MATCH_YES);
7473 /* Check that attribute DEFERRED is given iff an interface is specified, which
7474 means target != NULL. */
7475 if (tb->deferred && !target)
7477 gfc_error ("Interface must be specified for DEFERRED binding at %C");
7480 if (target && !tb->deferred)
7482 gfc_error ("PROCEDURE(interface) at %C should be declared DEFERRED");
7486 /* Match the colons. */
7487 m = gfc_match (" ::");
7488 if (m == MATCH_ERROR)
7490 seen_colons = (m == MATCH_YES);
7491 if (seen_attrs && !seen_colons)
7493 gfc_error ("Expected '::' after binding-attributes at %C");
7497 /* Match the binding name. */
7498 m = gfc_match_name (name);
7499 if (m == MATCH_ERROR)
7503 gfc_error ("Expected binding name at %C");
7507 /* Try to match the '=> target', if it's there. */
7508 m = gfc_match (" =>");
7509 if (m == MATCH_ERROR)
7515 gfc_error ("'=> target' is invalid for DEFERRED binding at %C");
7521 gfc_error ("'::' needed in PROCEDURE binding with explicit target"
7526 m = gfc_match_name (target_buf);
7527 if (m == MATCH_ERROR)
7531 gfc_error ("Expected binding target after '=>' at %C");
7534 target = target_buf;
7537 /* Now we should have the end. */
7538 m = gfc_match_eos ();
7539 if (m == MATCH_ERROR)
7543 gfc_error ("Junk after PROCEDURE declaration at %C");
7547 /* If no target was found, it has the same name as the binding. */
7551 /* Get the namespace to insert the symbols into. */
7552 ns = block->f2k_derived;
7555 /* If the binding is DEFERRED, check that the containing type is ABSTRACT. */
7556 if (tb->deferred && !block->attr.abstract)
7558 gfc_error ("Type '%s' containing DEFERRED binding at %C is not ABSTRACT",
7563 /* See if we already have a binding with this name in the symtree which would
7564 be an error. If a GENERIC already targetted this binding, it may be
7565 already there but then typebound is still NULL. */
7566 stree = gfc_find_symtree (ns->tb_sym_root, name);
7567 if (stree && stree->n.tb)
7569 gfc_error ("There's already a procedure with binding name '%s' for the"
7570 " derived type '%s' at %C", name, block->name);
7574 /* Insert it and set attributes. */
7578 stree = gfc_new_symtree (&ns->tb_sym_root, name);
7583 if (gfc_get_sym_tree (target, gfc_current_ns, &tb->u.specific, false))
7585 gfc_set_sym_referenced (tb->u.specific->n.sym);
7591 /* Match a GENERIC procedure binding inside a derived type. */
7594 gfc_match_generic (void)
7596 char name[GFC_MAX_SYMBOL_LEN + 1];
7597 char bind_name[GFC_MAX_SYMBOL_LEN + 16]; /* Allow space for OPERATOR(...). */
7599 gfc_typebound_proc tbattr; /* Used for match_binding_attributes. */
7600 gfc_typebound_proc* tb;
7602 interface_type op_type;
7603 gfc_intrinsic_op op;
7606 /* Check current state. */
7607 if (gfc_current_state () == COMP_DERIVED)
7609 gfc_error ("GENERIC at %C must be inside a derived-type CONTAINS");
7612 if (gfc_current_state () != COMP_DERIVED_CONTAINS)
7614 block = gfc_state_stack->previous->sym;
7615 ns = block->f2k_derived;
7616 gcc_assert (block && ns);
7618 /* See if we get an access-specifier. */
7619 m = match_binding_attributes (&tbattr, true, false);
7620 if (m == MATCH_ERROR)
7623 /* Now the colons, those are required. */
7624 if (gfc_match (" ::") != MATCH_YES)
7626 gfc_error ("Expected '::' at %C");
7630 /* Match the binding name; depending on type (operator / generic) format
7631 it for future error messages into bind_name. */
7633 m = gfc_match_generic_spec (&op_type, name, &op);
7634 if (m == MATCH_ERROR)
7638 gfc_error ("Expected generic name or operator descriptor at %C");
7644 case INTERFACE_GENERIC:
7645 snprintf (bind_name, sizeof (bind_name), "%s", name);
7648 case INTERFACE_USER_OP:
7649 snprintf (bind_name, sizeof (bind_name), "OPERATOR(.%s.)", name);
7652 case INTERFACE_INTRINSIC_OP:
7653 snprintf (bind_name, sizeof (bind_name), "OPERATOR(%s)",
7654 gfc_op2string (op));
7661 /* Match the required =>. */
7662 if (gfc_match (" =>") != MATCH_YES)
7664 gfc_error ("Expected '=>' at %C");
7668 /* Try to find existing GENERIC binding with this name / for this operator;
7669 if there is something, check that it is another GENERIC and then extend
7670 it rather than building a new node. Otherwise, create it and put it
7671 at the right position. */
7675 case INTERFACE_USER_OP:
7676 case INTERFACE_GENERIC:
7678 const bool is_op = (op_type == INTERFACE_USER_OP);
7681 st = gfc_find_symtree (is_op ? ns->tb_uop_root : ns->tb_sym_root, name);
7693 case INTERFACE_INTRINSIC_OP:
7703 if (!tb->is_generic)
7705 gcc_assert (op_type == INTERFACE_GENERIC);
7706 gfc_error ("There's already a non-generic procedure with binding name"
7707 " '%s' for the derived type '%s' at %C",
7708 bind_name, block->name);
7712 if (tb->access != tbattr.access)
7714 gfc_error ("Binding at %C must have the same access as already"
7715 " defined binding '%s'", bind_name);
7721 tb = gfc_get_typebound_proc ();
7722 tb->where = gfc_current_locus;
7723 tb->access = tbattr.access;
7725 tb->u.generic = NULL;
7729 case INTERFACE_GENERIC:
7730 case INTERFACE_USER_OP:
7732 const bool is_op = (op_type == INTERFACE_USER_OP);
7735 st = gfc_new_symtree (is_op ? &ns->tb_uop_root : &ns->tb_sym_root,
7743 case INTERFACE_INTRINSIC_OP:
7752 /* Now, match all following names as specific targets. */
7755 gfc_symtree* target_st;
7756 gfc_tbp_generic* target;
7758 m = gfc_match_name (name);
7759 if (m == MATCH_ERROR)
7763 gfc_error ("Expected specific binding name at %C");
7767 target_st = gfc_get_tbp_symtree (&ns->tb_sym_root, name);
7769 /* See if this is a duplicate specification. */
7770 for (target = tb->u.generic; target; target = target->next)
7771 if (target_st == target->specific_st)
7773 gfc_error ("'%s' already defined as specific binding for the"
7774 " generic '%s' at %C", name, bind_name);
7778 target = gfc_get_tbp_generic ();
7779 target->specific_st = target_st;
7780 target->specific = NULL;
7781 target->next = tb->u.generic;
7782 tb->u.generic = target;
7784 while (gfc_match (" ,") == MATCH_YES);
7786 /* Here should be the end. */
7787 if (gfc_match_eos () != MATCH_YES)
7789 gfc_error ("Junk after GENERIC binding at %C");
7800 /* Match a FINAL declaration inside a derived type. */
7803 gfc_match_final_decl (void)
7805 char name[GFC_MAX_SYMBOL_LEN + 1];
7808 gfc_namespace* module_ns;
7812 if (gfc_current_form == FORM_FREE)
7814 char c = gfc_peek_ascii_char ();
7815 if (!gfc_is_whitespace (c) && c != ':')
7819 if (gfc_state_stack->state != COMP_DERIVED_CONTAINS)
7821 if (gfc_current_form == FORM_FIXED)
7824 gfc_error ("FINAL declaration at %C must be inside a derived type "
7825 "CONTAINS section");
7829 block = gfc_state_stack->previous->sym;
7832 if (!gfc_state_stack->previous || !gfc_state_stack->previous->previous
7833 || gfc_state_stack->previous->previous->state != COMP_MODULE)
7835 gfc_error ("Derived type declaration with FINAL at %C must be in the"
7836 " specification part of a MODULE");
7840 module_ns = gfc_current_ns;
7841 gcc_assert (module_ns);
7842 gcc_assert (module_ns->proc_name->attr.flavor == FL_MODULE);
7844 /* Match optional ::, don't care about MATCH_YES or MATCH_NO. */
7845 if (gfc_match (" ::") == MATCH_ERROR)
7848 /* Match the sequence of procedure names. */
7855 if (first && gfc_match_eos () == MATCH_YES)
7857 gfc_error ("Empty FINAL at %C");
7861 m = gfc_match_name (name);
7864 gfc_error ("Expected module procedure name at %C");
7867 else if (m != MATCH_YES)
7870 if (gfc_match_eos () == MATCH_YES)
7872 if (!last && gfc_match_char (',') != MATCH_YES)
7874 gfc_error ("Expected ',' at %C");
7878 if (gfc_get_symbol (name, module_ns, &sym))
7880 gfc_error ("Unknown procedure name \"%s\" at %C", name);
7884 /* Mark the symbol as module procedure. */
7885 if (sym->attr.proc != PROC_MODULE
7886 && gfc_add_procedure (&sym->attr, PROC_MODULE,
7887 sym->name, NULL) == FAILURE)
7890 /* Check if we already have this symbol in the list, this is an error. */
7891 for (f = block->f2k_derived->finalizers; f; f = f->next)
7892 if (f->proc_sym == sym)
7894 gfc_error ("'%s' at %C is already defined as FINAL procedure!",
7899 /* Add this symbol to the list of finalizers. */
7900 gcc_assert (block->f2k_derived);
7902 f = XCNEW (gfc_finalizer);
7904 f->proc_tree = NULL;
7905 f->where = gfc_current_locus;
7906 f->next = block->f2k_derived->finalizers;
7907 block->f2k_derived->finalizers = f;
7917 const ext_attr_t ext_attr_list[] = {
7918 { "dllimport", EXT_ATTR_DLLIMPORT, "dllimport" },
7919 { "dllexport", EXT_ATTR_DLLEXPORT, "dllexport" },
7920 { "cdecl", EXT_ATTR_CDECL, "cdecl" },
7921 { "stdcall", EXT_ATTR_STDCALL, "stdcall" },
7922 { "fastcall", EXT_ATTR_FASTCALL, "fastcall" },
7923 { NULL, EXT_ATTR_LAST, NULL }
7926 /* Match a !GCC$ ATTRIBUTES statement of the form:
7927 !GCC$ ATTRIBUTES attribute-list :: var-name [, var-name] ...
7928 When we come here, we have already matched the !GCC$ ATTRIBUTES string.
7930 TODO: We should support all GCC attributes using the same syntax for
7931 the attribute list, i.e. the list in C
7932 __attributes(( attribute-list ))
7934 !GCC$ ATTRIBUTES attribute-list ::
7935 Cf. c-parser.c's c_parser_attributes; the data can then directly be
7938 As there is absolutely no risk of confusion, we should never return
7941 gfc_match_gcc_attributes (void)
7943 symbol_attribute attr;
7944 char name[GFC_MAX_SYMBOL_LEN + 1];
7949 gfc_clear_attr (&attr);
7954 if (gfc_match_name (name) != MATCH_YES)
7957 for (id = 0; id < EXT_ATTR_LAST; id++)
7958 if (strcmp (name, ext_attr_list[id].name) == 0)
7961 if (id == EXT_ATTR_LAST)
7963 gfc_error ("Unknown attribute in !GCC$ ATTRIBUTES statement at %C");
7967 if (gfc_add_ext_attribute (&attr, (ext_attr_id_t) id, &gfc_current_locus)
7971 gfc_gobble_whitespace ();
7972 ch = gfc_next_ascii_char ();
7975 /* This is the successful exit condition for the loop. */
7976 if (gfc_next_ascii_char () == ':')
7986 if (gfc_match_eos () == MATCH_YES)
7991 m = gfc_match_name (name);
7995 if (find_special (name, &sym, true))
7998 sym->attr.ext_attr |= attr.ext_attr;
8000 if (gfc_match_eos () == MATCH_YES)
8003 if (gfc_match_char (',') != MATCH_YES)
8010 gfc_error ("Syntax error in !GCC$ ATTRIBUTES statement at %C");