1 /* Declaration statement matcher
2 Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008
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/>. */
29 /* Macros to access allocate memory for gfc_data_variable,
30 gfc_data_value and gfc_data. */
31 #define gfc_get_data_variable() XCNEW (gfc_data_variable)
32 #define gfc_get_data_value() XCNEW (gfc_data_value)
33 #define gfc_get_data() XCNEW (gfc_data)
36 /* This flag is set if an old-style length selector is matched
37 during a type-declaration statement. */
39 static int old_char_selector;
41 /* When variables acquire types and attributes from a declaration
42 statement, they get them from the following static variables. The
43 first part of a declaration sets these variables and the second
44 part copies these into symbol structures. */
46 static gfc_typespec current_ts;
48 static symbol_attribute current_attr;
49 static gfc_array_spec *current_as;
50 static int colon_seen;
52 /* The current binding label (if any). */
53 static char curr_binding_label[GFC_MAX_BINDING_LABEL_LEN + 1];
54 /* Need to know how many identifiers are on the current data declaration
55 line in case we're given the BIND(C) attribute with a NAME= specifier. */
56 static int num_idents_on_line;
57 /* Need to know if a NAME= specifier was found during gfc_match_bind_c so we
58 can supply a name if the curr_binding_label is nil and NAME= was not. */
59 static int has_name_equals = 0;
61 /* Initializer of the previous enumerator. */
63 static gfc_expr *last_initializer;
65 /* History of all the enumerators is maintained, so that
66 kind values of all the enumerators could be updated depending
67 upon the maximum initialized value. */
69 typedef struct enumerator_history
72 gfc_expr *initializer;
73 struct enumerator_history *next;
77 /* Header of enum history chain. */
79 static enumerator_history *enum_history = NULL;
81 /* Pointer of enum history node containing largest initializer. */
83 static enumerator_history *max_enum = NULL;
85 /* gfc_new_block points to the symbol of a newly matched block. */
87 gfc_symbol *gfc_new_block;
89 bool gfc_matching_function;
92 /********************* DATA statement subroutines *********************/
94 static bool in_match_data = false;
97 gfc_in_match_data (void)
103 set_in_match_data (bool set_value)
105 in_match_data = set_value;
108 /* Free a gfc_data_variable structure and everything beneath it. */
111 free_variable (gfc_data_variable *p)
113 gfc_data_variable *q;
118 gfc_free_expr (p->expr);
119 gfc_free_iterator (&p->iter, 0);
120 free_variable (p->list);
126 /* Free a gfc_data_value structure and everything beneath it. */
129 free_value (gfc_data_value *p)
136 gfc_free_expr (p->expr);
142 /* Free a list of gfc_data structures. */
145 gfc_free_data (gfc_data *p)
152 free_variable (p->var);
153 free_value (p->value);
159 /* Free all data in a namespace. */
162 gfc_free_data_all (gfc_namespace *ns)
175 static match var_element (gfc_data_variable *);
177 /* Match a list of variables terminated by an iterator and a right
181 var_list (gfc_data_variable *parent)
183 gfc_data_variable *tail, var;
186 m = var_element (&var);
187 if (m == MATCH_ERROR)
192 tail = gfc_get_data_variable ();
199 if (gfc_match_char (',') != MATCH_YES)
202 m = gfc_match_iterator (&parent->iter, 1);
205 if (m == MATCH_ERROR)
208 m = var_element (&var);
209 if (m == MATCH_ERROR)
214 tail->next = gfc_get_data_variable ();
220 if (gfc_match_char (')') != MATCH_YES)
225 gfc_syntax_error (ST_DATA);
230 /* Match a single element in a data variable list, which can be a
231 variable-iterator list. */
234 var_element (gfc_data_variable *new_var)
239 memset (new_var, 0, sizeof (gfc_data_variable));
241 if (gfc_match_char ('(') == MATCH_YES)
242 return var_list (new_var);
244 m = gfc_match_variable (&new_var->expr, 0);
248 sym = new_var->expr->symtree->n.sym;
250 /* Symbol should already have an associated type. */
251 if (gfc_check_symbol_typed (sym, gfc_current_ns,
252 false, gfc_current_locus) == FAILURE)
255 if (!sym->attr.function && gfc_current_ns->parent
256 && gfc_current_ns->parent == sym->ns)
258 gfc_error ("Host associated variable '%s' may not be in the DATA "
259 "statement at %C", sym->name);
263 if (gfc_current_state () != COMP_BLOCK_DATA
264 && sym->attr.in_common
265 && gfc_notify_std (GFC_STD_GNU, "Extension: initialization of "
266 "common block variable '%s' in DATA statement at %C",
267 sym->name) == FAILURE)
270 if (gfc_add_data (&sym->attr, sym->name, &new_var->expr->where) == FAILURE)
277 /* Match the top-level list of data variables. */
280 top_var_list (gfc_data *d)
282 gfc_data_variable var, *tail, *new_var;
289 m = var_element (&var);
292 if (m == MATCH_ERROR)
295 new_var = gfc_get_data_variable ();
301 tail->next = new_var;
305 if (gfc_match_char ('/') == MATCH_YES)
307 if (gfc_match_char (',') != MATCH_YES)
314 gfc_syntax_error (ST_DATA);
315 gfc_free_data_all (gfc_current_ns);
321 match_data_constant (gfc_expr **result)
323 char name[GFC_MAX_SYMBOL_LEN + 1];
329 m = gfc_match_literal_constant (&expr, 1);
336 if (m == MATCH_ERROR)
339 m = gfc_match_null (result);
343 old_loc = gfc_current_locus;
345 /* Should this be a structure component, try to match it
346 before matching a name. */
347 m = gfc_match_rvalue (result);
348 if (m == MATCH_ERROR)
351 if (m == MATCH_YES && (*result)->expr_type == EXPR_STRUCTURE)
353 if (gfc_simplify_expr (*result, 0) == FAILURE)
358 gfc_current_locus = old_loc;
360 m = gfc_match_name (name);
364 if (gfc_find_symbol (name, NULL, 1, &sym))
368 || (sym->attr.flavor != FL_PARAMETER && sym->attr.flavor != FL_DERIVED))
370 gfc_error ("Symbol '%s' must be a PARAMETER in DATA statement at %C",
374 else if (sym->attr.flavor == FL_DERIVED)
375 return gfc_match_structure_constructor (sym, result, false);
377 /* Check to see if the value is an initialization array expression. */
378 if (sym->value->expr_type == EXPR_ARRAY)
380 gfc_current_locus = old_loc;
382 m = gfc_match_init_expr (result);
383 if (m == MATCH_ERROR)
388 if (gfc_simplify_expr (*result, 0) == FAILURE)
391 if ((*result)->expr_type == EXPR_CONSTANT)
395 gfc_error ("Invalid initializer %s in Data statement at %C", name);
401 *result = gfc_copy_expr (sym->value);
406 /* Match a list of values in a DATA statement. The leading '/' has
407 already been seen at this point. */
410 top_val_list (gfc_data *data)
412 gfc_data_value *new_val, *tail;
420 m = match_data_constant (&expr);
423 if (m == MATCH_ERROR)
426 new_val = gfc_get_data_value ();
427 mpz_init (new_val->repeat);
430 data->value = new_val;
432 tail->next = new_val;
436 if (expr->ts.type != BT_INTEGER || gfc_match_char ('*') != MATCH_YES)
439 mpz_set_ui (tail->repeat, 1);
443 if (expr->ts.type == BT_INTEGER)
444 mpz_set (tail->repeat, expr->value.integer);
445 gfc_free_expr (expr);
447 m = match_data_constant (&tail->expr);
450 if (m == MATCH_ERROR)
454 if (gfc_match_char ('/') == MATCH_YES)
456 if (gfc_match_char (',') == MATCH_NO)
463 gfc_syntax_error (ST_DATA);
464 gfc_free_data_all (gfc_current_ns);
469 /* Matches an old style initialization. */
472 match_old_style_init (const char *name)
479 /* Set up data structure to hold initializers. */
480 gfc_find_sym_tree (name, NULL, 0, &st);
483 newdata = gfc_get_data ();
484 newdata->var = gfc_get_data_variable ();
485 newdata->var->expr = gfc_get_variable_expr (st);
486 newdata->where = gfc_current_locus;
488 /* Match initial value list. This also eats the terminal '/'. */
489 m = top_val_list (newdata);
498 gfc_error ("Initialization at %C is not allowed in a PURE procedure");
503 /* Mark the variable as having appeared in a data statement. */
504 if (gfc_add_data (&sym->attr, sym->name, &sym->declared_at) == FAILURE)
510 /* Chain in namespace list of DATA initializers. */
511 newdata->next = gfc_current_ns->data;
512 gfc_current_ns->data = newdata;
518 /* Match the stuff following a DATA statement. If ERROR_FLAG is set,
519 we are matching a DATA statement and are therefore issuing an error
520 if we encounter something unexpected, if not, we're trying to match
521 an old-style initialization expression of the form INTEGER I /2/. */
524 gfc_match_data (void)
529 set_in_match_data (true);
533 new_data = gfc_get_data ();
534 new_data->where = gfc_current_locus;
536 m = top_var_list (new_data);
540 m = top_val_list (new_data);
544 new_data->next = gfc_current_ns->data;
545 gfc_current_ns->data = new_data;
547 if (gfc_match_eos () == MATCH_YES)
550 gfc_match_char (','); /* Optional comma */
553 set_in_match_data (false);
557 gfc_error ("DATA statement at %C is not allowed in a PURE procedure");
564 set_in_match_data (false);
565 gfc_free_data (new_data);
570 /************************ Declaration statements *********************/
572 /* Match an intent specification. Since this can only happen after an
573 INTENT word, a legal intent-spec must follow. */
576 match_intent_spec (void)
579 if (gfc_match (" ( in out )") == MATCH_YES)
581 if (gfc_match (" ( in )") == MATCH_YES)
583 if (gfc_match (" ( out )") == MATCH_YES)
586 gfc_error ("Bad INTENT specification at %C");
587 return INTENT_UNKNOWN;
591 /* Matches a character length specification, which is either a
592 specification expression or a '*'. */
595 char_len_param_value (gfc_expr **expr)
599 if (gfc_match_char ('*') == MATCH_YES)
605 m = gfc_match_expr (expr);
608 && gfc_expr_check_typed (*expr, gfc_current_ns, false) == FAILURE)
611 if (m == MATCH_YES && (*expr)->expr_type == EXPR_FUNCTION)
613 if ((*expr)->value.function.actual
614 && (*expr)->value.function.actual->expr->symtree)
617 e = (*expr)->value.function.actual->expr;
618 if (e->symtree->n.sym->attr.flavor == FL_PROCEDURE
619 && e->expr_type == EXPR_VARIABLE)
621 if (e->symtree->n.sym->ts.type == BT_UNKNOWN)
623 if (e->symtree->n.sym->ts.type == BT_CHARACTER
624 && e->symtree->n.sym->ts.cl
625 && e->symtree->n.sym->ts.cl->length->ts.type == BT_UNKNOWN)
633 gfc_error ("Conflict in attributes of function argument at %C");
638 /* A character length is a '*' followed by a literal integer or a
639 char_len_param_value in parenthesis. */
642 match_char_length (gfc_expr **expr)
647 m = gfc_match_char ('*');
651 m = gfc_match_small_literal_int (&length, NULL);
652 if (m == MATCH_ERROR)
657 *expr = gfc_int_expr (length);
661 if (gfc_match_char ('(') == MATCH_NO)
664 m = char_len_param_value (expr);
665 if (m != MATCH_YES && gfc_matching_function)
671 if (m == MATCH_ERROR)
676 if (gfc_match_char (')') == MATCH_NO)
678 gfc_free_expr (*expr);
686 gfc_error ("Syntax error in character length specification at %C");
691 /* Special subroutine for finding a symbol. Check if the name is found
692 in the current name space. If not, and we're compiling a function or
693 subroutine and the parent compilation unit is an interface, then check
694 to see if the name we've been given is the name of the interface
695 (located in another namespace). */
698 find_special (const char *name, gfc_symbol **result)
703 i = gfc_get_symbol (name, NULL, result);
707 if (gfc_current_state () != COMP_SUBROUTINE
708 && gfc_current_state () != COMP_FUNCTION)
711 s = gfc_state_stack->previous;
715 if (s->state != COMP_INTERFACE)
718 goto end; /* Nameless interface. */
720 if (strcmp (name, s->sym->name) == 0)
731 /* Special subroutine for getting a symbol node associated with a
732 procedure name, used in SUBROUTINE and FUNCTION statements. The
733 symbol is created in the parent using with symtree node in the
734 child unit pointing to the symbol. If the current namespace has no
735 parent, then the symbol is just created in the current unit. */
738 get_proc_name (const char *name, gfc_symbol **result, bool module_fcn_entry)
744 /* Module functions have to be left in their own namespace because
745 they have potentially (almost certainly!) already been referenced.
746 In this sense, they are rather like external functions. This is
747 fixed up in resolve.c(resolve_entries), where the symbol name-
748 space is set to point to the master function, so that the fake
749 result mechanism can work. */
750 if (module_fcn_entry)
752 /* Present if entry is declared to be a module procedure. */
753 rc = gfc_find_symbol (name, gfc_current_ns->parent, 0, result);
756 rc = gfc_get_symbol (name, NULL, result);
757 else if (!gfc_get_symbol (name, NULL, &sym) && sym
758 && (*result)->ts.type == BT_UNKNOWN
759 && sym->attr.flavor == FL_UNKNOWN)
760 /* Pick up the typespec for the entry, if declared in the function
761 body. Note that this symbol is FL_UNKNOWN because it will
762 only have appeared in a type declaration. The local symtree
763 is set to point to the module symbol and a unique symtree
764 to the local version. This latter ensures a correct clearing
767 /* If the ENTRY proceeds its specification, we need to ensure
768 that this does not raise a "has no IMPLICIT type" error. */
769 if (sym->ts.type == BT_UNKNOWN)
770 sym->attr.untyped = 1;
772 (*result)->ts = sym->ts;
774 /* Put the symbol in the procedure namespace so that, should
775 the ENTRY precede its specification, the specification
777 (*result)->ns = gfc_current_ns;
779 gfc_find_sym_tree (name, gfc_current_ns, 0, &st);
781 st = gfc_get_unique_symtree (gfc_current_ns);
786 rc = gfc_get_symbol (name, gfc_current_ns->parent, result);
792 gfc_current_ns->refs++;
794 if (sym && !sym->gfc_new && gfc_current_state () != COMP_INTERFACE)
796 /* Trap another encompassed procedure with the same name. All
797 these conditions are necessary to avoid picking up an entry
798 whose name clashes with that of the encompassing procedure;
799 this is handled using gsymbols to register unique,globally
801 if (sym->attr.flavor != 0
802 && sym->attr.proc != 0
803 && (sym->attr.subroutine || sym->attr.function)
804 && sym->attr.if_source != IFSRC_UNKNOWN)
805 gfc_error_now ("Procedure '%s' at %C is already defined at %L",
806 name, &sym->declared_at);
808 /* Trap a procedure with a name the same as interface in the
809 encompassing scope. */
810 if (sym->attr.generic != 0
811 && (sym->attr.subroutine || sym->attr.function)
812 && !sym->attr.mod_proc)
813 gfc_error_now ("Name '%s' at %C is already defined"
814 " as a generic interface at %L",
815 name, &sym->declared_at);
817 /* Trap declarations of attributes in encompassing scope. The
818 signature for this is that ts.kind is set. Legitimate
819 references only set ts.type. */
820 if (sym->ts.kind != 0
821 && !sym->attr.implicit_type
822 && sym->attr.proc == 0
823 && gfc_current_ns->parent != NULL
824 && sym->attr.access == 0
825 && !module_fcn_entry)
826 gfc_error_now ("Procedure '%s' at %C has an explicit interface "
827 "and must not have attributes declared at %L",
828 name, &sym->declared_at);
831 if (gfc_current_ns->parent == NULL || *result == NULL)
834 /* Module function entries will already have a symtree in
835 the current namespace but will need one at module level. */
836 if (module_fcn_entry)
838 /* Present if entry is declared to be a module procedure. */
839 rc = gfc_find_sym_tree (name, gfc_current_ns->parent, 0, &st);
841 st = gfc_new_symtree (&gfc_current_ns->parent->sym_root, name);
844 st = gfc_new_symtree (&gfc_current_ns->sym_root, name);
849 /* See if the procedure should be a module procedure. */
851 if (((sym->ns->proc_name != NULL
852 && sym->ns->proc_name->attr.flavor == FL_MODULE
853 && sym->attr.proc != PROC_MODULE)
854 || (module_fcn_entry && sym->attr.proc != PROC_MODULE))
855 && gfc_add_procedure (&sym->attr, PROC_MODULE,
856 sym->name, NULL) == FAILURE)
863 /* Verify that the given symbol representing a parameter is C
864 interoperable, by checking to see if it was marked as such after
865 its declaration. If the given symbol is not interoperable, a
866 warning is reported, thus removing the need to return the status to
867 the calling function. The standard does not require the user use
868 one of the iso_c_binding named constants to declare an
869 interoperable parameter, but we can't be sure if the param is C
870 interop or not if the user doesn't. For example, integer(4) may be
871 legal Fortran, but doesn't have meaning in C. It may interop with
872 a number of the C types, which causes a problem because the
873 compiler can't know which one. This code is almost certainly not
874 portable, and the user will get what they deserve if the C type
875 across platforms isn't always interoperable with integer(4). If
876 the user had used something like integer(c_int) or integer(c_long),
877 the compiler could have automatically handled the varying sizes
881 verify_c_interop_param (gfc_symbol *sym)
883 int is_c_interop = 0;
884 gfc_try retval = SUCCESS;
886 /* We check implicitly typed variables in symbol.c:gfc_set_default_type().
887 Don't repeat the checks here. */
888 if (sym->attr.implicit_type)
891 /* For subroutines or functions that are passed to a BIND(C) procedure,
892 they're interoperable if they're BIND(C) and their params are all
894 if (sym->attr.flavor == FL_PROCEDURE)
896 if (sym->attr.is_bind_c == 0)
898 gfc_error_now ("Procedure '%s' at %L must have the BIND(C) "
899 "attribute to be C interoperable", sym->name,
900 &(sym->declared_at));
906 if (sym->attr.is_c_interop == 1)
907 /* We've already checked this procedure; don't check it again. */
910 return verify_bind_c_sym (sym, &(sym->ts), sym->attr.in_common,
915 /* See if we've stored a reference to a procedure that owns sym. */
916 if (sym->ns != NULL && sym->ns->proc_name != NULL)
918 if (sym->ns->proc_name->attr.is_bind_c == 1)
921 (verify_c_interop (&(sym->ts), sym->name, &(sym->declared_at))
924 if (is_c_interop != 1)
926 /* Make personalized messages to give better feedback. */
927 if (sym->ts.type == BT_DERIVED)
928 gfc_error ("Type '%s' at %L is a parameter to the BIND(C) "
929 " procedure '%s' but is not C interoperable "
930 "because derived type '%s' is not C interoperable",
931 sym->name, &(sym->declared_at),
932 sym->ns->proc_name->name,
933 sym->ts.derived->name);
935 gfc_warning ("Variable '%s' at %L is a parameter to the "
936 "BIND(C) procedure '%s' but may not be C "
938 sym->name, &(sym->declared_at),
939 sym->ns->proc_name->name);
942 /* Character strings are only C interoperable if they have a
944 if (sym->ts.type == BT_CHARACTER)
946 gfc_charlen *cl = sym->ts.cl;
947 if (!cl || !cl->length || cl->length->expr_type != EXPR_CONSTANT
948 || mpz_cmp_si (cl->length->value.integer, 1) != 0)
950 gfc_error ("Character argument '%s' at %L "
951 "must be length 1 because "
952 "procedure '%s' is BIND(C)",
953 sym->name, &sym->declared_at,
954 sym->ns->proc_name->name);
959 /* We have to make sure that any param to a bind(c) routine does
960 not have the allocatable, pointer, or optional attributes,
961 according to J3/04-007, section 5.1. */
962 if (sym->attr.allocatable == 1)
964 gfc_error ("Variable '%s' at %L cannot have the "
965 "ALLOCATABLE attribute because procedure '%s'"
966 " is BIND(C)", sym->name, &(sym->declared_at),
967 sym->ns->proc_name->name);
971 if (sym->attr.pointer == 1)
973 gfc_error ("Variable '%s' at %L cannot have the "
974 "POINTER attribute because procedure '%s'"
975 " is BIND(C)", sym->name, &(sym->declared_at),
976 sym->ns->proc_name->name);
980 if (sym->attr.optional == 1)
982 gfc_error ("Variable '%s' at %L cannot have the "
983 "OPTIONAL attribute because procedure '%s'"
984 " is BIND(C)", sym->name, &(sym->declared_at),
985 sym->ns->proc_name->name);
989 /* Make sure that if it has the dimension attribute, that it is
990 either assumed size or explicit shape. */
993 if (sym->as->type == AS_ASSUMED_SHAPE)
995 gfc_error ("Assumed-shape array '%s' at %L cannot be an "
996 "argument to the procedure '%s' at %L because "
997 "the procedure is BIND(C)", sym->name,
998 &(sym->declared_at), sym->ns->proc_name->name,
999 &(sym->ns->proc_name->declared_at));
1003 if (sym->as->type == AS_DEFERRED)
1005 gfc_error ("Deferred-shape array '%s' at %L cannot be an "
1006 "argument to the procedure '%s' at %L because "
1007 "the procedure is BIND(C)", sym->name,
1008 &(sym->declared_at), sym->ns->proc_name->name,
1009 &(sym->ns->proc_name->declared_at));
1020 /* Function called by variable_decl() that adds a name to the symbol table. */
1023 build_sym (const char *name, gfc_charlen *cl,
1024 gfc_array_spec **as, locus *var_locus)
1026 symbol_attribute attr;
1029 if (gfc_get_symbol (name, NULL, &sym))
1032 /* Start updating the symbol table. Add basic type attribute if present. */
1033 if (current_ts.type != BT_UNKNOWN
1034 && (sym->attr.implicit_type == 0
1035 || !gfc_compare_types (&sym->ts, ¤t_ts))
1036 && gfc_add_type (sym, ¤t_ts, var_locus) == FAILURE)
1039 if (sym->ts.type == BT_CHARACTER)
1042 /* Add dimension attribute if present. */
1043 if (gfc_set_array_spec (sym, *as, var_locus) == FAILURE)
1047 /* Add attribute to symbol. The copy is so that we can reset the
1048 dimension attribute. */
1049 attr = current_attr;
1052 if (gfc_copy_attr (&sym->attr, &attr, var_locus) == FAILURE)
1055 /* Finish any work that may need to be done for the binding label,
1056 if it's a bind(c). The bind(c) attr is found before the symbol
1057 is made, and before the symbol name (for data decls), so the
1058 current_ts is holding the binding label, or nothing if the
1059 name= attr wasn't given. Therefore, test here if we're dealing
1060 with a bind(c) and make sure the binding label is set correctly. */
1061 if (sym->attr.is_bind_c == 1)
1063 if (sym->binding_label[0] == '\0')
1065 /* Set the binding label and verify that if a NAME= was specified
1066 then only one identifier was in the entity-decl-list. */
1067 if (set_binding_label (sym->binding_label, sym->name,
1068 num_idents_on_line) == FAILURE)
1073 /* See if we know we're in a common block, and if it's a bind(c)
1074 common then we need to make sure we're an interoperable type. */
1075 if (sym->attr.in_common == 1)
1077 /* Test the common block object. */
1078 if (sym->common_block != NULL && sym->common_block->is_bind_c == 1
1079 && sym->ts.is_c_interop != 1)
1081 gfc_error_now ("Variable '%s' in common block '%s' at %C "
1082 "must be declared with a C interoperable "
1083 "kind since common block '%s' is BIND(C)",
1084 sym->name, sym->common_block->name,
1085 sym->common_block->name);
1090 sym->attr.implied_index = 0;
1096 /* Set character constant to the given length. The constant will be padded or
1097 truncated. If we're inside an array constructor without a typespec, we
1098 additionally check that all elements have the same length; check_len -1
1099 means no checking. */
1102 gfc_set_constant_character_len (int len, gfc_expr *expr, int check_len)
1107 gcc_assert (expr->expr_type == EXPR_CONSTANT);
1108 gcc_assert (expr->ts.type == BT_CHARACTER);
1110 slen = expr->value.character.length;
1113 s = gfc_get_wide_string (len + 1);
1114 memcpy (s, expr->value.character.string,
1115 MIN (len, slen) * sizeof (gfc_char_t));
1117 gfc_wide_memset (&s[slen], ' ', len - slen);
1119 if (gfc_option.warn_character_truncation && slen > len)
1120 gfc_warning_now ("CHARACTER expression at %L is being truncated "
1121 "(%d/%d)", &expr->where, slen, len);
1123 /* Apply the standard by 'hand' otherwise it gets cleared for
1125 if (check_len != -1 && slen != check_len
1126 && !(gfc_option.allow_std & GFC_STD_GNU))
1127 gfc_error_now ("The CHARACTER elements of the array constructor "
1128 "at %L must have the same length (%d/%d)",
1129 &expr->where, slen, check_len);
1132 gfc_free (expr->value.character.string);
1133 expr->value.character.string = s;
1134 expr->value.character.length = len;
1139 /* Function to create and update the enumerator history
1140 using the information passed as arguments.
1141 Pointer "max_enum" is also updated, to point to
1142 enum history node containing largest initializer.
1144 SYM points to the symbol node of enumerator.
1145 INIT points to its enumerator value. */
1148 create_enum_history (gfc_symbol *sym, gfc_expr *init)
1150 enumerator_history *new_enum_history;
1151 gcc_assert (sym != NULL && init != NULL);
1153 new_enum_history = XCNEW (enumerator_history);
1155 new_enum_history->sym = sym;
1156 new_enum_history->initializer = init;
1157 new_enum_history->next = NULL;
1159 if (enum_history == NULL)
1161 enum_history = new_enum_history;
1162 max_enum = enum_history;
1166 new_enum_history->next = enum_history;
1167 enum_history = new_enum_history;
1169 if (mpz_cmp (max_enum->initializer->value.integer,
1170 new_enum_history->initializer->value.integer) < 0)
1171 max_enum = new_enum_history;
1176 /* Function to free enum kind history. */
1179 gfc_free_enum_history (void)
1181 enumerator_history *current = enum_history;
1182 enumerator_history *next;
1184 while (current != NULL)
1186 next = current->next;
1191 enum_history = NULL;
1195 /* Function called by variable_decl() that adds an initialization
1196 expression to a symbol. */
1199 add_init_expr_to_sym (const char *name, gfc_expr **initp, locus *var_locus)
1201 symbol_attribute attr;
1206 if (find_special (name, &sym))
1211 /* If this symbol is confirming an implicit parameter type,
1212 then an initialization expression is not allowed. */
1213 if (attr.flavor == FL_PARAMETER
1214 && sym->value != NULL
1217 gfc_error ("Initializer not allowed for PARAMETER '%s' at %C",
1224 /* An initializer is required for PARAMETER declarations. */
1225 if (attr.flavor == FL_PARAMETER)
1227 gfc_error ("PARAMETER at %L is missing an initializer", var_locus);
1233 /* If a variable appears in a DATA block, it cannot have an
1237 gfc_error ("Variable '%s' at %C with an initializer already "
1238 "appears in a DATA statement", sym->name);
1242 /* Check if the assignment can happen. This has to be put off
1243 until later for a derived type variable. */
1244 if (sym->ts.type != BT_DERIVED && init->ts.type != BT_DERIVED
1245 && gfc_check_assign_symbol (sym, init) == FAILURE)
1248 if (sym->ts.type == BT_CHARACTER && sym->ts.cl)
1250 /* Update symbol character length according initializer. */
1251 if (sym->ts.cl->length == NULL)
1254 /* If there are multiple CHARACTER variables declared on the
1255 same line, we don't want them to share the same length. */
1256 sym->ts.cl = gfc_get_charlen ();
1257 sym->ts.cl->next = gfc_current_ns->cl_list;
1258 gfc_current_ns->cl_list = sym->ts.cl;
1260 if (sym->attr.flavor == FL_PARAMETER)
1262 if (init->expr_type == EXPR_CONSTANT)
1264 clen = init->value.character.length;
1265 sym->ts.cl->length = gfc_int_expr (clen);
1267 else if (init->expr_type == EXPR_ARRAY)
1269 gfc_expr *p = init->value.constructor->expr;
1270 clen = p->value.character.length;
1271 sym->ts.cl->length = gfc_int_expr (clen);
1273 else if (init->ts.cl && init->ts.cl->length)
1274 sym->ts.cl->length =
1275 gfc_copy_expr (sym->value->ts.cl->length);
1278 /* Update initializer character length according symbol. */
1279 else if (sym->ts.cl->length->expr_type == EXPR_CONSTANT)
1281 int len = mpz_get_si (sym->ts.cl->length->value.integer);
1282 gfc_constructor * p;
1284 if (init->expr_type == EXPR_CONSTANT)
1285 gfc_set_constant_character_len (len, init, -1);
1286 else if (init->expr_type == EXPR_ARRAY)
1288 /* Build a new charlen to prevent simplification from
1289 deleting the length before it is resolved. */
1290 init->ts.cl = gfc_get_charlen ();
1291 init->ts.cl->next = gfc_current_ns->cl_list;
1292 gfc_current_ns->cl_list = sym->ts.cl;
1293 init->ts.cl->length = gfc_copy_expr (sym->ts.cl->length);
1295 for (p = init->value.constructor; p; p = p->next)
1296 gfc_set_constant_character_len (len, p->expr, -1);
1301 /* Need to check if the expression we initialized this
1302 to was one of the iso_c_binding named constants. If so,
1303 and we're a parameter (constant), let it be iso_c.
1305 integer(c_int), parameter :: my_int = c_int
1306 integer(my_int) :: my_int_2
1307 If we mark my_int as iso_c (since we can see it's value
1308 is equal to one of the named constants), then my_int_2
1309 will be considered C interoperable. */
1310 if (sym->ts.type != BT_CHARACTER && sym->ts.type != BT_DERIVED)
1312 sym->ts.is_iso_c |= init->ts.is_iso_c;
1313 sym->ts.is_c_interop |= init->ts.is_c_interop;
1314 /* attr bits needed for module files. */
1315 sym->attr.is_iso_c |= init->ts.is_iso_c;
1316 sym->attr.is_c_interop |= init->ts.is_c_interop;
1317 if (init->ts.is_iso_c)
1318 sym->ts.f90_type = init->ts.f90_type;
1321 /* Add initializer. Make sure we keep the ranks sane. */
1322 if (sym->attr.dimension && init->rank == 0)
1328 if (sym->attr.flavor == FL_PARAMETER
1329 && init->expr_type == EXPR_CONSTANT
1330 && spec_size (sym->as, &size) == SUCCESS
1331 && mpz_cmp_si (size, 0) > 0)
1333 array = gfc_start_constructor (init->ts.type, init->ts.kind,
1336 array->value.constructor = c = NULL;
1337 for (n = 0; n < (int)mpz_get_si (size); n++)
1339 if (array->value.constructor == NULL)
1341 array->value.constructor = c = gfc_get_constructor ();
1346 c->next = gfc_get_constructor ();
1348 c->expr = gfc_copy_expr (init);
1352 array->shape = gfc_get_shape (sym->as->rank);
1353 for (n = 0; n < sym->as->rank; n++)
1354 spec_dimen_size (sym->as, n, &array->shape[n]);
1359 init->rank = sym->as->rank;
1363 if (sym->attr.save == SAVE_NONE)
1364 sym->attr.save = SAVE_IMPLICIT;
1372 /* Function called by variable_decl() that adds a name to a structure
1376 build_struct (const char *name, gfc_charlen *cl, gfc_expr **init,
1377 gfc_array_spec **as)
1381 /* If the current symbol is of the same derived type that we're
1382 constructing, it must have the pointer attribute. */
1383 if (current_ts.type == BT_DERIVED
1384 && current_ts.derived == gfc_current_block ()
1385 && current_attr.pointer == 0)
1387 gfc_error ("Component at %C must have the POINTER attribute");
1391 if (gfc_current_block ()->attr.pointer && (*as)->rank != 0)
1393 if ((*as)->type != AS_DEFERRED && (*as)->type != AS_EXPLICIT)
1395 gfc_error ("Array component of structure at %C must have explicit "
1396 "or deferred shape");
1401 if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE)
1406 c->attr = current_attr;
1408 c->initializer = *init;
1413 c->attr.dimension = 1;
1416 /* Should this ever get more complicated, combine with similar section
1417 in add_init_expr_to_sym into a separate function. */
1418 if (c->ts.type == BT_CHARACTER && !c->attr.pointer && c->initializer && c->ts.cl
1419 && c->ts.cl->length && c->ts.cl->length->expr_type == EXPR_CONSTANT)
1423 gcc_assert (c->ts.cl && c->ts.cl->length);
1424 gcc_assert (c->ts.cl->length->expr_type == EXPR_CONSTANT);
1425 gcc_assert (c->ts.cl->length->ts.type == BT_INTEGER);
1427 len = mpz_get_si (c->ts.cl->length->value.integer);
1429 if (c->initializer->expr_type == EXPR_CONSTANT)
1430 gfc_set_constant_character_len (len, c->initializer, -1);
1431 else if (mpz_cmp (c->ts.cl->length->value.integer,
1432 c->initializer->ts.cl->length->value.integer))
1435 gfc_constructor *ctor = c->initializer->value.constructor;
1440 has_ts = (c->initializer->ts.cl
1441 && c->initializer->ts.cl->length_from_typespec);
1443 for (; ctor; ctor = ctor->next)
1445 /* Remember the length of the first element for checking that
1446 all elements *in the constructor* have the same length. This
1447 need not be the length of the LHS! */
1450 gcc_assert (ctor->expr->expr_type == EXPR_CONSTANT);
1451 gcc_assert (ctor->expr->ts.type == BT_CHARACTER);
1452 first_len = ctor->expr->value.character.length;
1456 if (ctor->expr->expr_type == EXPR_CONSTANT)
1457 gfc_set_constant_character_len (len, ctor->expr,
1458 has_ts ? -1 : first_len);
1463 /* Check array components. */
1464 if (!c->attr.dimension)
1466 if (c->attr.allocatable)
1468 gfc_error ("Allocatable component at %C must be an array");
1475 if (c->attr.pointer)
1477 if (c->as->type != AS_DEFERRED)
1479 gfc_error ("Pointer array component of structure at %C must have a "
1484 else if (c->attr.allocatable)
1486 if (c->as->type != AS_DEFERRED)
1488 gfc_error ("Allocatable component of structure at %C must have a "
1495 if (c->as->type != AS_EXPLICIT)
1497 gfc_error ("Array component of structure at %C must have an "
1507 /* Match a 'NULL()', and possibly take care of some side effects. */
1510 gfc_match_null (gfc_expr **result)
1516 m = gfc_match (" null ( )");
1520 /* The NULL symbol now has to be/become an intrinsic function. */
1521 if (gfc_get_symbol ("null", NULL, &sym))
1523 gfc_error ("NULL() initialization at %C is ambiguous");
1527 gfc_intrinsic_symbol (sym);
1529 if (sym->attr.proc != PROC_INTRINSIC
1530 && (gfc_add_procedure (&sym->attr, PROC_INTRINSIC,
1531 sym->name, NULL) == FAILURE
1532 || gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE))
1535 e = gfc_get_expr ();
1536 e->where = gfc_current_locus;
1537 e->expr_type = EXPR_NULL;
1538 e->ts.type = BT_UNKNOWN;
1546 /* Match a variable name with an optional initializer. When this
1547 subroutine is called, a variable is expected to be parsed next.
1548 Depending on what is happening at the moment, updates either the
1549 symbol table or the current interface. */
1552 variable_decl (int elem)
1554 char name[GFC_MAX_SYMBOL_LEN + 1];
1555 gfc_expr *initializer, *char_len;
1557 gfc_array_spec *cp_as; /* Extra copy for Cray Pointees. */
1568 old_locus = gfc_current_locus;
1570 /* When we get here, we've just matched a list of attributes and
1571 maybe a type and a double colon. The next thing we expect to see
1572 is the name of the symbol. */
1573 m = gfc_match_name (name);
1577 var_locus = gfc_current_locus;
1579 /* Now we could see the optional array spec. or character length. */
1580 m = gfc_match_array_spec (&as);
1581 if (gfc_option.flag_cray_pointer && m == MATCH_YES)
1582 cp_as = gfc_copy_array_spec (as);
1583 else if (m == MATCH_ERROR)
1587 as = gfc_copy_array_spec (current_as);
1592 if (current_ts.type == BT_CHARACTER)
1594 switch (match_char_length (&char_len))
1597 cl = gfc_get_charlen ();
1598 cl->next = gfc_current_ns->cl_list;
1599 gfc_current_ns->cl_list = cl;
1601 cl->length = char_len;
1604 /* Non-constant lengths need to be copied after the first
1605 element. Also copy assumed lengths. */
1608 && (current_ts.cl->length == NULL
1609 || current_ts.cl->length->expr_type != EXPR_CONSTANT))
1611 cl = gfc_get_charlen ();
1612 cl->next = gfc_current_ns->cl_list;
1613 gfc_current_ns->cl_list = cl;
1614 cl->length = gfc_copy_expr (current_ts.cl->length);
1626 /* If this symbol has already shown up in a Cray Pointer declaration,
1627 then we want to set the type & bail out. */
1628 if (gfc_option.flag_cray_pointer)
1630 gfc_find_symbol (name, gfc_current_ns, 1, &sym);
1631 if (sym != NULL && sym->attr.cray_pointee)
1633 sym->ts.type = current_ts.type;
1634 sym->ts.kind = current_ts.kind;
1636 sym->ts.derived = current_ts.derived;
1637 sym->ts.is_c_interop = current_ts.is_c_interop;
1638 sym->ts.is_iso_c = current_ts.is_iso_c;
1641 /* Check to see if we have an array specification. */
1644 if (sym->as != NULL)
1646 gfc_error ("Duplicate array spec for Cray pointee at %C");
1647 gfc_free_array_spec (cp_as);
1653 if (gfc_set_array_spec (sym, cp_as, &var_locus) == FAILURE)
1654 gfc_internal_error ("Couldn't set pointee array spec.");
1656 /* Fix the array spec. */
1657 m = gfc_mod_pointee_as (sym->as);
1658 if (m == MATCH_ERROR)
1666 gfc_free_array_spec (cp_as);
1671 /* OK, we've successfully matched the declaration. Now put the
1672 symbol in the current namespace, because it might be used in the
1673 optional initialization expression for this symbol, e.g. this is
1676 integer, parameter :: i = huge(i)
1678 This is only true for parameters or variables of a basic type.
1679 For components of derived types, it is not true, so we don't
1680 create a symbol for those yet. If we fail to create the symbol,
1682 if (gfc_current_state () != COMP_DERIVED
1683 && build_sym (name, cl, &as, &var_locus) == FAILURE)
1689 /* An interface body specifies all of the procedure's
1690 characteristics and these shall be consistent with those
1691 specified in the procedure definition, except that the interface
1692 may specify a procedure that is not pure if the procedure is
1693 defined to be pure(12.3.2). */
1694 if (current_ts.type == BT_DERIVED
1695 && gfc_current_ns->proc_name
1696 && gfc_current_ns->proc_name->attr.if_source == IFSRC_IFBODY
1697 && current_ts.derived->ns != gfc_current_ns)
1700 st = gfc_find_symtree (gfc_current_ns->sym_root, current_ts.derived->name);
1701 if (!(current_ts.derived->attr.imported
1703 && st->n.sym == current_ts.derived)
1704 && !gfc_current_ns->has_import_set)
1706 gfc_error ("the type of '%s' at %C has not been declared within the "
1713 /* In functions that have a RESULT variable defined, the function
1714 name always refers to function calls. Therefore, the name is
1715 not allowed to appear in specification statements. */
1716 if (gfc_current_state () == COMP_FUNCTION
1717 && gfc_current_block () != NULL
1718 && gfc_current_block ()->result != NULL
1719 && gfc_current_block ()->result != gfc_current_block ()
1720 && strcmp (gfc_current_block ()->name, name) == 0)
1722 gfc_error ("Function name '%s' not allowed at %C", name);
1727 /* We allow old-style initializations of the form
1728 integer i /2/, j(4) /3*3, 1/
1729 (if no colon has been seen). These are different from data
1730 statements in that initializers are only allowed to apply to the
1731 variable immediately preceding, i.e.
1733 is not allowed. Therefore we have to do some work manually, that
1734 could otherwise be left to the matchers for DATA statements. */
1736 if (!colon_seen && gfc_match (" /") == MATCH_YES)
1738 if (gfc_notify_std (GFC_STD_GNU, "Extension: Old-style "
1739 "initialization at %C") == FAILURE)
1742 return match_old_style_init (name);
1745 /* The double colon must be present in order to have initializers.
1746 Otherwise the statement is ambiguous with an assignment statement. */
1749 if (gfc_match (" =>") == MATCH_YES)
1751 if (!current_attr.pointer)
1753 gfc_error ("Initialization at %C isn't for a pointer variable");
1758 m = gfc_match_null (&initializer);
1761 gfc_error ("Pointer initialization requires a NULL() at %C");
1765 if (gfc_pure (NULL))
1767 gfc_error ("Initialization of pointer at %C is not allowed in "
1768 "a PURE procedure");
1776 else if (gfc_match_char ('=') == MATCH_YES)
1778 if (current_attr.pointer)
1780 gfc_error ("Pointer initialization at %C requires '=>', "
1786 m = gfc_match_init_expr (&initializer);
1789 gfc_error ("Expected an initialization expression at %C");
1793 if (current_attr.flavor != FL_PARAMETER && gfc_pure (NULL))
1795 gfc_error ("Initialization of variable at %C is not allowed in "
1796 "a PURE procedure");
1805 if (initializer != NULL && current_attr.allocatable
1806 && gfc_current_state () == COMP_DERIVED)
1808 gfc_error ("Initialization of allocatable component at %C is not "
1814 /* Add the initializer. Note that it is fine if initializer is
1815 NULL here, because we sometimes also need to check if a
1816 declaration *must* have an initialization expression. */
1817 if (gfc_current_state () != COMP_DERIVED)
1818 t = add_init_expr_to_sym (name, &initializer, &var_locus);
1821 if (current_ts.type == BT_DERIVED
1822 && !current_attr.pointer && !initializer)
1823 initializer = gfc_default_initializer (¤t_ts);
1824 t = build_struct (name, cl, &initializer, &as);
1827 m = (t == SUCCESS) ? MATCH_YES : MATCH_ERROR;
1830 /* Free stuff up and return. */
1831 gfc_free_expr (initializer);
1832 gfc_free_array_spec (as);
1838 /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification.
1839 This assumes that the byte size is equal to the kind number for
1840 non-COMPLEX types, and equal to twice the kind number for COMPLEX. */
1843 gfc_match_old_kind_spec (gfc_typespec *ts)
1848 if (gfc_match_char ('*') != MATCH_YES)
1851 m = gfc_match_small_literal_int (&ts->kind, NULL);
1855 original_kind = ts->kind;
1857 /* Massage the kind numbers for complex types. */
1858 if (ts->type == BT_COMPLEX)
1862 gfc_error ("Old-style type declaration %s*%d not supported at %C",
1863 gfc_basic_typename (ts->type), original_kind);
1869 if (gfc_validate_kind (ts->type, ts->kind, true) < 0)
1871 gfc_error ("Old-style type declaration %s*%d not supported at %C",
1872 gfc_basic_typename (ts->type), original_kind);
1876 if (gfc_notify_std (GFC_STD_GNU, "Nonstandard type declaration %s*%d at %C",
1877 gfc_basic_typename (ts->type), original_kind) == FAILURE)
1884 /* Match a kind specification. Since kinds are generally optional, we
1885 usually return MATCH_NO if something goes wrong. If a "kind="
1886 string is found, then we know we have an error. */
1889 gfc_match_kind_spec (gfc_typespec *ts, bool kind_expr_only)
1901 where = loc = gfc_current_locus;
1906 if (gfc_match_char ('(') == MATCH_NO)
1909 /* Also gobbles optional text. */
1910 if (gfc_match (" kind = ") == MATCH_YES)
1913 loc = gfc_current_locus;
1916 n = gfc_match_init_expr (&e);
1920 if (gfc_matching_function)
1922 /* The function kind expression might include use associated or
1923 imported parameters and try again after the specification
1925 if (gfc_match_char (')') != MATCH_YES)
1927 gfc_error ("Missing right parenthesis at %C");
1933 gfc_undo_symbols ();
1938 /* ....or else, the match is real. */
1940 gfc_error ("Expected initialization expression at %C");
1948 gfc_error ("Expected scalar initialization expression at %C");
1953 msg = gfc_extract_int (e, &ts->kind);
1962 /* Before throwing away the expression, let's see if we had a
1963 C interoperable kind (and store the fact). */
1964 if (e->ts.is_c_interop == 1)
1966 /* Mark this as c interoperable if being declared with one
1967 of the named constants from iso_c_binding. */
1968 ts->is_c_interop = e->ts.is_iso_c;
1969 ts->f90_type = e->ts.f90_type;
1975 /* Ignore errors to this point, if we've gotten here. This means
1976 we ignore the m=MATCH_ERROR from above. */
1977 if (gfc_validate_kind (ts->type, ts->kind, true) < 0)
1979 gfc_error ("Kind %d not supported for type %s at %C", ts->kind,
1980 gfc_basic_typename (ts->type));
1981 gfc_current_locus = where;
1985 gfc_gobble_whitespace ();
1986 if ((c = gfc_next_ascii_char ()) != ')'
1987 && (ts->type != BT_CHARACTER || c != ','))
1989 if (ts->type == BT_CHARACTER)
1990 gfc_error ("Missing right parenthesis or comma at %C");
1992 gfc_error ("Missing right parenthesis at %C");
1996 /* All tests passed. */
1999 if(m == MATCH_ERROR)
2000 gfc_current_locus = where;
2002 /* Return what we know from the test(s). */
2007 gfc_current_locus = where;
2013 match_char_kind (int * kind, int * is_iso_c)
2022 where = gfc_current_locus;
2024 n = gfc_match_init_expr (&e);
2026 if (n != MATCH_YES && gfc_matching_function)
2028 /* The expression might include use-associated or imported
2029 parameters and try again after the specification
2032 gfc_undo_symbols ();
2037 gfc_error ("Expected initialization expression at %C");
2043 gfc_error ("Expected scalar initialization expression at %C");
2048 msg = gfc_extract_int (e, kind);
2049 *is_iso_c = e->ts.is_iso_c;
2059 /* Ignore errors to this point, if we've gotten here. This means
2060 we ignore the m=MATCH_ERROR from above. */
2061 if (gfc_validate_kind (BT_CHARACTER, *kind, true) < 0)
2063 gfc_error ("Kind %d is not supported for CHARACTER at %C", *kind);
2067 /* All tests passed. */
2070 if (m == MATCH_ERROR)
2071 gfc_current_locus = where;
2073 /* Return what we know from the test(s). */
2078 gfc_current_locus = where;
2082 /* Match the various kind/length specifications in a CHARACTER
2083 declaration. We don't return MATCH_NO. */
2086 match_char_spec (gfc_typespec *ts)
2088 int kind, seen_length, is_iso_c;
2098 /* Try the old-style specification first. */
2099 old_char_selector = 0;
2101 m = match_char_length (&len);
2105 old_char_selector = 1;
2110 m = gfc_match_char ('(');
2113 m = MATCH_YES; /* Character without length is a single char. */
2117 /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ). */
2118 if (gfc_match (" kind =") == MATCH_YES)
2120 m = match_char_kind (&kind, &is_iso_c);
2122 if (m == MATCH_ERROR)
2127 if (gfc_match (" , len =") == MATCH_NO)
2130 m = char_len_param_value (&len);
2133 if (m == MATCH_ERROR)
2140 /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>". */
2141 if (gfc_match (" len =") == MATCH_YES)
2143 m = char_len_param_value (&len);
2146 if (m == MATCH_ERROR)
2150 if (gfc_match_char (')') == MATCH_YES)
2153 if (gfc_match (" , kind =") != MATCH_YES)
2156 if (match_char_kind (&kind, &is_iso_c) == MATCH_ERROR)
2162 /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */
2163 m = char_len_param_value (&len);
2166 if (m == MATCH_ERROR)
2170 m = gfc_match_char (')');
2174 if (gfc_match_char (',') != MATCH_YES)
2177 gfc_match (" kind ="); /* Gobble optional text. */
2179 m = match_char_kind (&kind, &is_iso_c);
2180 if (m == MATCH_ERROR)
2186 /* Require a right-paren at this point. */
2187 m = gfc_match_char (')');
2192 gfc_error ("Syntax error in CHARACTER declaration at %C");
2194 gfc_free_expr (len);
2198 /* Deal with character functions after USE and IMPORT statements. */
2199 if (gfc_matching_function)
2201 gfc_free_expr (len);
2202 gfc_undo_symbols ();
2208 gfc_free_expr (len);
2212 /* Do some final massaging of the length values. */
2213 cl = gfc_get_charlen ();
2214 cl->next = gfc_current_ns->cl_list;
2215 gfc_current_ns->cl_list = cl;
2217 if (seen_length == 0)
2218 cl->length = gfc_int_expr (1);
2223 ts->kind = kind == 0 ? gfc_default_character_kind : kind;
2225 /* We have to know if it was a c interoperable kind so we can
2226 do accurate type checking of bind(c) procs, etc. */
2228 /* Mark this as c interoperable if being declared with one
2229 of the named constants from iso_c_binding. */
2230 ts->is_c_interop = is_iso_c;
2231 else if (len != NULL)
2232 /* Here, we might have parsed something such as: character(c_char)
2233 In this case, the parsing code above grabs the c_char when
2234 looking for the length (line 1690, roughly). it's the last
2235 testcase for parsing the kind params of a character variable.
2236 However, it's not actually the length. this seems like it
2238 To see if the user used a C interop kind, test the expr
2239 of the so called length, and see if it's C interoperable. */
2240 ts->is_c_interop = len->ts.is_iso_c;
2246 /* Matches a type specification. If successful, sets the ts structure
2247 to the matched specification. This is necessary for FUNCTION and
2248 IMPLICIT statements.
2250 If implicit_flag is nonzero, then we don't check for the optional
2251 kind specification. Not doing so is needed for matching an IMPLICIT
2252 statement correctly. */
2255 gfc_match_type_spec (gfc_typespec *ts, int implicit_flag)
2257 char name[GFC_MAX_SYMBOL_LEN + 1];
2261 bool seen_deferred_kind;
2263 /* A belt and braces check that the typespec is correctly being treated
2264 as a deferred characteristic association. */
2265 seen_deferred_kind = (gfc_current_state () == COMP_FUNCTION)
2266 && (gfc_current_block ()->result->ts.kind == -1)
2267 && (ts->kind == -1);
2269 if (seen_deferred_kind)
2272 /* Clear the current binding label, in case one is given. */
2273 curr_binding_label[0] = '\0';
2275 if (gfc_match (" byte") == MATCH_YES)
2277 if (gfc_notify_std(GFC_STD_GNU, "Extension: BYTE type at %C")
2281 if (gfc_validate_kind (BT_INTEGER, 1, true) < 0)
2283 gfc_error ("BYTE type used at %C "
2284 "is not available on the target machine");
2288 ts->type = BT_INTEGER;
2293 if (gfc_match (" integer") == MATCH_YES)
2295 ts->type = BT_INTEGER;
2296 ts->kind = gfc_default_integer_kind;
2300 if (gfc_match (" character") == MATCH_YES)
2302 ts->type = BT_CHARACTER;
2303 if (implicit_flag == 0)
2304 return match_char_spec (ts);
2309 if (gfc_match (" real") == MATCH_YES)
2312 ts->kind = gfc_default_real_kind;
2316 if (gfc_match (" double precision") == MATCH_YES)
2319 ts->kind = gfc_default_double_kind;
2323 if (gfc_match (" complex") == MATCH_YES)
2325 ts->type = BT_COMPLEX;
2326 ts->kind = gfc_default_complex_kind;
2330 if (gfc_match (" double complex") == MATCH_YES)
2332 if (gfc_notify_std (GFC_STD_GNU, "DOUBLE COMPLEX at %C does not "
2333 "conform to the Fortran 95 standard") == FAILURE)
2336 ts->type = BT_COMPLEX;
2337 ts->kind = gfc_default_double_kind;
2341 if (gfc_match (" logical") == MATCH_YES)
2343 ts->type = BT_LOGICAL;
2344 ts->kind = gfc_default_logical_kind;
2348 m = gfc_match (" type ( %n )", name);
2352 ts->type = BT_DERIVED;
2354 /* Defer association of the derived type until the end of the
2355 specification block. However, if the derived type can be
2356 found, add it to the typespec. */
2357 if (gfc_matching_function)
2360 if (gfc_current_state () != COMP_INTERFACE
2361 && !gfc_find_symbol (name, NULL, 1, &sym) && sym)
2366 /* Search for the name but allow the components to be defined later. If
2367 type = -1, this typespec has been seen in a function declaration but
2368 the type could not be accessed at that point. */
2370 if (ts->kind != -1 && gfc_get_ha_symbol (name, &sym))
2372 gfc_error ("Type name '%s' at %C is ambiguous", name);
2375 else if (ts->kind == -1)
2377 int iface = gfc_state_stack->previous->state != COMP_INTERFACE
2378 || gfc_current_ns->has_import_set;
2379 if (gfc_find_symbol (name, NULL, iface, &sym))
2381 gfc_error ("Type name '%s' at %C is ambiguous", name);
2390 if (sym->attr.flavor != FL_DERIVED
2391 && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE)
2394 gfc_set_sym_referenced (sym);
2400 /* For all types except double, derived and character, look for an
2401 optional kind specifier. MATCH_NO is actually OK at this point. */
2402 if (implicit_flag == 1)
2405 if (gfc_current_form == FORM_FREE)
2407 c = gfc_peek_ascii_char();
2408 if (!gfc_is_whitespace(c) && c != '*' && c != '('
2409 && c != ':' && c != ',')
2413 m = gfc_match_kind_spec (ts, false);
2414 if (m == MATCH_NO && ts->type != BT_CHARACTER)
2415 m = gfc_match_old_kind_spec (ts);
2417 /* Defer association of the KIND expression of function results
2418 until after USE and IMPORT statements. */
2419 if ((gfc_current_state () == COMP_NONE && gfc_error_flag_test ())
2420 || gfc_matching_function)
2424 m = MATCH_YES; /* No kind specifier found. */
2430 /* Match an IMPLICIT NONE statement. Actually, this statement is
2431 already matched in parse.c, or we would not end up here in the
2432 first place. So the only thing we need to check, is if there is
2433 trailing garbage. If not, the match is successful. */
2436 gfc_match_implicit_none (void)
2438 return (gfc_match_eos () == MATCH_YES) ? MATCH_YES : MATCH_NO;
2442 /* Match the letter range(s) of an IMPLICIT statement. */
2445 match_implicit_range (void)
2451 cur_loc = gfc_current_locus;
2453 gfc_gobble_whitespace ();
2454 c = gfc_next_ascii_char ();
2457 gfc_error ("Missing character range in IMPLICIT at %C");
2464 gfc_gobble_whitespace ();
2465 c1 = gfc_next_ascii_char ();
2469 gfc_gobble_whitespace ();
2470 c = gfc_next_ascii_char ();
2475 inner = 0; /* Fall through. */
2482 gfc_gobble_whitespace ();
2483 c2 = gfc_next_ascii_char ();
2487 gfc_gobble_whitespace ();
2488 c = gfc_next_ascii_char ();
2490 if ((c != ',') && (c != ')'))
2503 gfc_error ("Letters must be in alphabetic order in "
2504 "IMPLICIT statement at %C");
2508 /* See if we can add the newly matched range to the pending
2509 implicits from this IMPLICIT statement. We do not check for
2510 conflicts with whatever earlier IMPLICIT statements may have
2511 set. This is done when we've successfully finished matching
2513 if (gfc_add_new_implicit_range (c1, c2) != SUCCESS)
2520 gfc_syntax_error (ST_IMPLICIT);
2522 gfc_current_locus = cur_loc;
2527 /* Match an IMPLICIT statement, storing the types for
2528 gfc_set_implicit() if the statement is accepted by the parser.
2529 There is a strange looking, but legal syntactic construction
2530 possible. It looks like:
2532 IMPLICIT INTEGER (a-b) (c-d)
2534 This is legal if "a-b" is a constant expression that happens to
2535 equal one of the legal kinds for integers. The real problem
2536 happens with an implicit specification that looks like:
2538 IMPLICIT INTEGER (a-b)
2540 In this case, a typespec matcher that is "greedy" (as most of the
2541 matchers are) gobbles the character range as a kindspec, leaving
2542 nothing left. We therefore have to go a bit more slowly in the
2543 matching process by inhibiting the kindspec checking during
2544 typespec matching and checking for a kind later. */
2547 gfc_match_implicit (void)
2556 /* We don't allow empty implicit statements. */
2557 if (gfc_match_eos () == MATCH_YES)
2559 gfc_error ("Empty IMPLICIT statement at %C");
2565 /* First cleanup. */
2566 gfc_clear_new_implicit ();
2568 /* A basic type is mandatory here. */
2569 m = gfc_match_type_spec (&ts, 1);
2570 if (m == MATCH_ERROR)
2575 cur_loc = gfc_current_locus;
2576 m = match_implicit_range ();
2580 /* We may have <TYPE> (<RANGE>). */
2581 gfc_gobble_whitespace ();
2582 c = gfc_next_ascii_char ();
2583 if ((c == '\n') || (c == ','))
2585 /* Check for CHARACTER with no length parameter. */
2586 if (ts.type == BT_CHARACTER && !ts.cl)
2588 ts.kind = gfc_default_character_kind;
2589 ts.cl = gfc_get_charlen ();
2590 ts.cl->next = gfc_current_ns->cl_list;
2591 gfc_current_ns->cl_list = ts.cl;
2592 ts.cl->length = gfc_int_expr (1);
2595 /* Record the Successful match. */
2596 if (gfc_merge_new_implicit (&ts) != SUCCESS)
2601 gfc_current_locus = cur_loc;
2604 /* Discard the (incorrectly) matched range. */
2605 gfc_clear_new_implicit ();
2607 /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */
2608 if (ts.type == BT_CHARACTER)
2609 m = match_char_spec (&ts);
2612 m = gfc_match_kind_spec (&ts, false);
2615 m = gfc_match_old_kind_spec (&ts);
2616 if (m == MATCH_ERROR)
2622 if (m == MATCH_ERROR)
2625 m = match_implicit_range ();
2626 if (m == MATCH_ERROR)
2631 gfc_gobble_whitespace ();
2632 c = gfc_next_ascii_char ();
2633 if ((c != '\n') && (c != ','))
2636 if (gfc_merge_new_implicit (&ts) != SUCCESS)
2644 gfc_syntax_error (ST_IMPLICIT);
2652 gfc_match_import (void)
2654 char name[GFC_MAX_SYMBOL_LEN + 1];
2659 if (gfc_current_ns->proc_name == NULL
2660 || gfc_current_ns->proc_name->attr.if_source != IFSRC_IFBODY)
2662 gfc_error ("IMPORT statement at %C only permitted in "
2663 "an INTERFACE body");
2667 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IMPORT statement at %C")
2671 if (gfc_match_eos () == MATCH_YES)
2673 /* All host variables should be imported. */
2674 gfc_current_ns->has_import_set = 1;
2678 if (gfc_match (" ::") == MATCH_YES)
2680 if (gfc_match_eos () == MATCH_YES)
2682 gfc_error ("Expecting list of named entities at %C");
2689 m = gfc_match (" %n", name);
2693 if (gfc_current_ns->parent != NULL
2694 && gfc_find_symbol (name, gfc_current_ns->parent, 1, &sym))
2696 gfc_error ("Type name '%s' at %C is ambiguous", name);
2699 else if (gfc_current_ns->proc_name->ns->parent != NULL
2700 && gfc_find_symbol (name,
2701 gfc_current_ns->proc_name->ns->parent,
2704 gfc_error ("Type name '%s' at %C is ambiguous", name);
2710 gfc_error ("Cannot IMPORT '%s' from host scoping unit "
2711 "at %C - does not exist.", name);
2715 if (gfc_find_symtree (gfc_current_ns->sym_root,name))
2717 gfc_warning ("'%s' is already IMPORTed from host scoping unit "
2722 st = gfc_new_symtree (&gfc_current_ns->sym_root, name);
2725 sym->attr.imported = 1;
2737 if (gfc_match_eos () == MATCH_YES)
2739 if (gfc_match_char (',') != MATCH_YES)
2746 gfc_error ("Syntax error in IMPORT statement at %C");
2751 /* A minimal implementation of gfc_match without whitespace, escape
2752 characters or variable arguments. Returns true if the next
2753 characters match the TARGET template exactly. */
2756 match_string_p (const char *target)
2760 for (p = target; *p; p++)
2761 if ((char) gfc_next_ascii_char () != *p)
2766 /* Matches an attribute specification including array specs. If
2767 successful, leaves the variables current_attr and current_as
2768 holding the specification. Also sets the colon_seen variable for
2769 later use by matchers associated with initializations.
2771 This subroutine is a little tricky in the sense that we don't know
2772 if we really have an attr-spec until we hit the double colon.
2773 Until that time, we can only return MATCH_NO. This forces us to
2774 check for duplicate specification at this level. */
2777 match_attr_spec (void)
2779 /* Modifiers that can exist in a type statement. */
2781 { GFC_DECL_BEGIN = 0,
2782 DECL_ALLOCATABLE = GFC_DECL_BEGIN, DECL_DIMENSION, DECL_EXTERNAL,
2783 DECL_IN, DECL_OUT, DECL_INOUT, DECL_INTRINSIC, DECL_OPTIONAL,
2784 DECL_PARAMETER, DECL_POINTER, DECL_PROTECTED, DECL_PRIVATE,
2785 DECL_PUBLIC, DECL_SAVE, DECL_TARGET, DECL_VALUE, DECL_VOLATILE,
2786 DECL_IS_BIND_C, DECL_NONE,
2787 GFC_DECL_END /* Sentinel */
2791 /* GFC_DECL_END is the sentinel, index starts at 0. */
2792 #define NUM_DECL GFC_DECL_END
2794 locus start, seen_at[NUM_DECL];
2801 gfc_clear_attr (¤t_attr);
2802 start = gfc_current_locus;
2807 /* See if we get all of the keywords up to the final double colon. */
2808 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
2816 gfc_gobble_whitespace ();
2818 ch = gfc_next_ascii_char ();
2821 /* This is the successful exit condition for the loop. */
2822 if (gfc_next_ascii_char () == ':')
2827 gfc_gobble_whitespace ();
2828 switch (gfc_peek_ascii_char ())
2831 if (match_string_p ("allocatable"))
2832 d = DECL_ALLOCATABLE;
2836 /* Try and match the bind(c). */
2837 m = gfc_match_bind_c (NULL, true);
2840 else if (m == MATCH_ERROR)
2845 if (match_string_p ("dimension"))
2850 if (match_string_p ("external"))
2855 if (match_string_p ("int"))
2857 ch = gfc_next_ascii_char ();
2860 if (match_string_p ("nt"))
2862 /* Matched "intent". */
2863 /* TODO: Call match_intent_spec from here. */
2864 if (gfc_match (" ( in out )") == MATCH_YES)
2866 else if (gfc_match (" ( in )") == MATCH_YES)
2868 else if (gfc_match (" ( out )") == MATCH_YES)
2874 if (match_string_p ("insic"))
2876 /* Matched "intrinsic". */
2884 if (match_string_p ("optional"))
2889 gfc_next_ascii_char ();
2890 switch (gfc_next_ascii_char ())
2893 if (match_string_p ("rameter"))
2895 /* Matched "parameter". */
2901 if (match_string_p ("inter"))
2903 /* Matched "pointer". */
2909 ch = gfc_next_ascii_char ();
2912 if (match_string_p ("vate"))
2914 /* Matched "private". */
2920 if (match_string_p ("tected"))
2922 /* Matched "protected". */
2929 if (match_string_p ("blic"))
2931 /* Matched "public". */
2939 if (match_string_p ("save"))
2944 if (match_string_p ("target"))
2949 gfc_next_ascii_char ();
2950 ch = gfc_next_ascii_char ();
2953 if (match_string_p ("lue"))
2955 /* Matched "value". */
2961 if (match_string_p ("latile"))
2963 /* Matched "volatile". */
2971 /* No double colon and no recognizable decl_type, so assume that
2972 we've been looking at something else the whole time. */
2979 /* Check to make sure any parens are paired up correctly. */
2980 if (gfc_match_parens () == MATCH_ERROR)
2987 seen_at[d] = gfc_current_locus;
2989 if (d == DECL_DIMENSION)
2991 m = gfc_match_array_spec (¤t_as);
2995 gfc_error ("Missing dimension specification at %C");
2999 if (m == MATCH_ERROR)
3004 /* Since we've seen a double colon, we have to be looking at an
3005 attr-spec. This means that we can now issue errors. */
3006 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
3011 case DECL_ALLOCATABLE:
3012 attr = "ALLOCATABLE";
3014 case DECL_DIMENSION:
3021 attr = "INTENT (IN)";
3024 attr = "INTENT (OUT)";
3027 attr = "INTENT (IN OUT)";
3029 case DECL_INTRINSIC:
3035 case DECL_PARAMETER:
3041 case DECL_PROTECTED:
3056 case DECL_IS_BIND_C:
3066 attr = NULL; /* This shouldn't happen. */
3069 gfc_error ("Duplicate %s attribute at %L", attr, &seen_at[d]);
3074 /* Now that we've dealt with duplicate attributes, add the attributes
3075 to the current attribute. */
3076 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
3081 if (gfc_current_state () == COMP_DERIVED
3082 && d != DECL_DIMENSION && d != DECL_POINTER
3083 && d != DECL_PRIVATE && d != DECL_PUBLIC
3086 if (d == DECL_ALLOCATABLE)
3088 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ALLOCATABLE "
3089 "attribute at %C in a TYPE definition")
3098 gfc_error ("Attribute at %L is not allowed in a TYPE definition",
3105 if ((d == DECL_PRIVATE || d == DECL_PUBLIC)
3106 && gfc_current_state () != COMP_MODULE)
3108 if (d == DECL_PRIVATE)
3112 if (gfc_current_state () == COMP_DERIVED
3113 && gfc_state_stack->previous
3114 && gfc_state_stack->previous->state == COMP_MODULE)
3116 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Attribute %s "
3117 "at %L in a TYPE definition", attr,
3127 gfc_error ("%s attribute at %L is not allowed outside of the "
3128 "specification part of a module", attr, &seen_at[d]);
3136 case DECL_ALLOCATABLE:
3137 t = gfc_add_allocatable (¤t_attr, &seen_at[d]);
3140 case DECL_DIMENSION:
3141 t = gfc_add_dimension (¤t_attr, NULL, &seen_at[d]);
3145 t = gfc_add_external (¤t_attr, &seen_at[d]);
3149 t = gfc_add_intent (¤t_attr, INTENT_IN, &seen_at[d]);
3153 t = gfc_add_intent (¤t_attr, INTENT_OUT, &seen_at[d]);
3157 t = gfc_add_intent (¤t_attr, INTENT_INOUT, &seen_at[d]);
3160 case DECL_INTRINSIC:
3161 t = gfc_add_intrinsic (¤t_attr, &seen_at[d]);
3165 t = gfc_add_optional (¤t_attr, &seen_at[d]);
3168 case DECL_PARAMETER:
3169 t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, &seen_at[d]);
3173 t = gfc_add_pointer (¤t_attr, &seen_at[d]);
3176 case DECL_PROTECTED:
3177 if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE)
3179 gfc_error ("PROTECTED at %C only allowed in specification "
3180 "part of a module");
3185 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED "
3190 t = gfc_add_protected (¤t_attr, NULL, &seen_at[d]);
3194 t = gfc_add_access (¤t_attr, ACCESS_PRIVATE, NULL,
3199 t = gfc_add_access (¤t_attr, ACCESS_PUBLIC, NULL,
3204 t = gfc_add_save (¤t_attr, NULL, &seen_at[d]);
3208 t = gfc_add_target (¤t_attr, &seen_at[d]);
3211 case DECL_IS_BIND_C:
3212 t = gfc_add_is_bind_c(¤t_attr, NULL, &seen_at[d], 0);
3216 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE attribute "
3221 t = gfc_add_value (¤t_attr, NULL, &seen_at[d]);
3225 if (gfc_notify_std (GFC_STD_F2003,
3226 "Fortran 2003: VOLATILE attribute at %C")
3230 t = gfc_add_volatile (¤t_attr, NULL, &seen_at[d]);
3234 gfc_internal_error ("match_attr_spec(): Bad attribute");
3248 gfc_current_locus = start;
3249 gfc_free_array_spec (current_as);
3255 /* Set the binding label, dest_label, either with the binding label
3256 stored in the given gfc_typespec, ts, or if none was provided, it
3257 will be the symbol name in all lower case, as required by the draft
3258 (J3/04-007, section 15.4.1). If a binding label was given and
3259 there is more than one argument (num_idents), it is an error. */
3262 set_binding_label (char *dest_label, const char *sym_name, int num_idents)
3264 if (num_idents > 1 && has_name_equals)
3266 gfc_error ("Multiple identifiers provided with "
3267 "single NAME= specifier at %C");
3271 if (curr_binding_label[0] != '\0')
3273 /* Binding label given; store in temp holder til have sym. */
3274 strcpy (dest_label, curr_binding_label);
3278 /* No binding label given, and the NAME= specifier did not exist,
3279 which means there was no NAME="". */
3280 if (sym_name != NULL && has_name_equals == 0)
3281 strcpy (dest_label, sym_name);
3288 /* Set the status of the given common block as being BIND(C) or not,
3289 depending on the given parameter, is_bind_c. */
3292 set_com_block_bind_c (gfc_common_head *com_block, int is_bind_c)
3294 com_block->is_bind_c = is_bind_c;
3299 /* Verify that the given gfc_typespec is for a C interoperable type. */
3302 verify_c_interop (gfc_typespec *ts, const char *name, locus *where)
3306 /* Make sure the kind used is appropriate for the type.
3307 The f90_type is unknown if an integer constant was
3308 used (e.g., real(4), bind(c) :: myFloat). */
3309 if (ts->f90_type != BT_UNKNOWN)
3311 t = gfc_validate_c_kind (ts);
3314 /* Print an error, but continue parsing line. */
3315 gfc_error_now ("C kind parameter is for type %s but "
3316 "symbol '%s' at %L is of type %s",
3317 gfc_basic_typename (ts->f90_type),
3319 gfc_basic_typename (ts->type));
3323 /* Make sure the kind is C interoperable. This does not care about the
3324 possible error above. */
3325 if (ts->type == BT_DERIVED && ts->derived != NULL)
3326 return (ts->derived->ts.is_c_interop ? SUCCESS : FAILURE);
3327 else if (ts->is_c_interop != 1)
3334 /* Verify that the variables of a given common block, which has been
3335 defined with the attribute specifier bind(c), to be of a C
3336 interoperable type. Errors will be reported here, if
3340 verify_com_block_vars_c_interop (gfc_common_head *com_block)
3342 gfc_symbol *curr_sym = NULL;
3343 gfc_try retval = SUCCESS;
3345 curr_sym = com_block->head;
3347 /* Make sure we have at least one symbol. */
3348 if (curr_sym == NULL)
3351 /* Here we know we have a symbol, so we'll execute this loop
3355 /* The second to last param, 1, says this is in a common block. */
3356 retval = verify_bind_c_sym (curr_sym, &(curr_sym->ts), 1, com_block);
3357 curr_sym = curr_sym->common_next;
3358 } while (curr_sym != NULL);
3364 /* Verify that a given BIND(C) symbol is C interoperable. If it is not,
3365 an appropriate error message is reported. */
3368 verify_bind_c_sym (gfc_symbol *tmp_sym, gfc_typespec *ts,
3369 int is_in_common, gfc_common_head *com_block)
3371 bool bind_c_function = false;
3372 gfc_try retval = SUCCESS;
3374 if (tmp_sym->attr.function && tmp_sym->attr.is_bind_c)
3375 bind_c_function = true;
3377 if (tmp_sym->attr.function && tmp_sym->result != NULL)
3379 tmp_sym = tmp_sym->result;
3380 /* Make sure it wasn't an implicitly typed result. */
3381 if (tmp_sym->attr.implicit_type)
3383 gfc_warning ("Implicitly declared BIND(C) function '%s' at "
3384 "%L may not be C interoperable", tmp_sym->name,
3385 &tmp_sym->declared_at);
3386 tmp_sym->ts.f90_type = tmp_sym->ts.type;
3387 /* Mark it as C interoperable to prevent duplicate warnings. */
3388 tmp_sym->ts.is_c_interop = 1;
3389 tmp_sym->attr.is_c_interop = 1;
3393 /* Here, we know we have the bind(c) attribute, so if we have
3394 enough type info, then verify that it's a C interop kind.
3395 The info could be in the symbol already, or possibly still in
3396 the given ts (current_ts), so look in both. */
3397 if (tmp_sym->ts.type != BT_UNKNOWN || ts->type != BT_UNKNOWN)
3399 if (verify_c_interop (&(tmp_sym->ts), tmp_sym->name,
3400 &(tmp_sym->declared_at)) != SUCCESS)
3402 /* See if we're dealing with a sym in a common block or not. */
3403 if (is_in_common == 1)
3405 gfc_warning ("Variable '%s' in common block '%s' at %L "
3406 "may not be a C interoperable "
3407 "kind though common block '%s' is BIND(C)",
3408 tmp_sym->name, com_block->name,
3409 &(tmp_sym->declared_at), com_block->name);
3413 if (tmp_sym->ts.type == BT_DERIVED || ts->type == BT_DERIVED)
3414 gfc_error ("Type declaration '%s' at %L is not C "
3415 "interoperable but it is BIND(C)",
3416 tmp_sym->name, &(tmp_sym->declared_at));
3418 gfc_warning ("Variable '%s' at %L "
3419 "may not be a C interoperable "
3420 "kind but it is bind(c)",
3421 tmp_sym->name, &(tmp_sym->declared_at));
3425 /* Variables declared w/in a common block can't be bind(c)
3426 since there's no way for C to see these variables, so there's
3427 semantically no reason for the attribute. */
3428 if (is_in_common == 1 && tmp_sym->attr.is_bind_c == 1)
3430 gfc_error ("Variable '%s' in common block '%s' at "
3431 "%L cannot be declared with BIND(C) "
3432 "since it is not a global",
3433 tmp_sym->name, com_block->name,
3434 &(tmp_sym->declared_at));
3438 /* Scalar variables that are bind(c) can not have the pointer
3439 or allocatable attributes. */
3440 if (tmp_sym->attr.is_bind_c == 1)
3442 if (tmp_sym->attr.pointer == 1)
3444 gfc_error ("Variable '%s' at %L cannot have both the "
3445 "POINTER and BIND(C) attributes",
3446 tmp_sym->name, &(tmp_sym->declared_at));
3450 if (tmp_sym->attr.allocatable == 1)
3452 gfc_error ("Variable '%s' at %L cannot have both the "
3453 "ALLOCATABLE and BIND(C) attributes",
3454 tmp_sym->name, &(tmp_sym->declared_at));
3460 /* If it is a BIND(C) function, make sure the return value is a
3461 scalar value. The previous tests in this function made sure
3462 the type is interoperable. */
3463 if (bind_c_function && tmp_sym->as != NULL)
3464 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3465 "be an array", tmp_sym->name, &(tmp_sym->declared_at));
3467 /* BIND(C) functions can not return a character string. */
3468 if (bind_c_function && tmp_sym->ts.type == BT_CHARACTER)
3469 if (tmp_sym->ts.cl == NULL || tmp_sym->ts.cl->length == NULL
3470 || tmp_sym->ts.cl->length->expr_type != EXPR_CONSTANT
3471 || mpz_cmp_si (tmp_sym->ts.cl->length->value.integer, 1) != 0)
3472 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3473 "be a character string", tmp_sym->name,
3474 &(tmp_sym->declared_at));
3477 /* See if the symbol has been marked as private. If it has, make sure
3478 there is no binding label and warn the user if there is one. */
3479 if (tmp_sym->attr.access == ACCESS_PRIVATE
3480 && tmp_sym->binding_label[0] != '\0')
3481 /* Use gfc_warning_now because we won't say that the symbol fails
3482 just because of this. */
3483 gfc_warning_now ("Symbol '%s' at %L is marked PRIVATE but has been "
3484 "given the binding label '%s'", tmp_sym->name,
3485 &(tmp_sym->declared_at), tmp_sym->binding_label);
3491 /* Set the appropriate fields for a symbol that's been declared as
3492 BIND(C) (the is_bind_c flag and the binding label), and verify that
3493 the type is C interoperable. Errors are reported by the functions
3494 used to set/test these fields. */
3497 set_verify_bind_c_sym (gfc_symbol *tmp_sym, int num_idents)
3499 gfc_try retval = SUCCESS;
3501 /* TODO: Do we need to make sure the vars aren't marked private? */
3503 /* Set the is_bind_c bit in symbol_attribute. */
3504 gfc_add_is_bind_c (&(tmp_sym->attr), tmp_sym->name, &gfc_current_locus, 0);
3506 if (set_binding_label (tmp_sym->binding_label, tmp_sym->name,
3507 num_idents) != SUCCESS)
3514 /* Set the fields marking the given common block as BIND(C), including
3515 a binding label, and report any errors encountered. */
3518 set_verify_bind_c_com_block (gfc_common_head *com_block, int num_idents)
3520 gfc_try retval = SUCCESS;
3522 /* destLabel, common name, typespec (which may have binding label). */
3523 if (set_binding_label (com_block->binding_label, com_block->name, num_idents)
3527 /* Set the given common block (com_block) to being bind(c) (1). */
3528 set_com_block_bind_c (com_block, 1);
3534 /* Retrieve the list of one or more identifiers that the given bind(c)
3535 attribute applies to. */
3538 get_bind_c_idents (void)
3540 char name[GFC_MAX_SYMBOL_LEN + 1];
3542 gfc_symbol *tmp_sym = NULL;
3544 gfc_common_head *com_block = NULL;
3546 if (gfc_match_name (name) == MATCH_YES)
3548 found_id = MATCH_YES;
3549 gfc_get_ha_symbol (name, &tmp_sym);
3551 else if (match_common_name (name) == MATCH_YES)
3553 found_id = MATCH_YES;
3554 com_block = gfc_get_common (name, 0);
3558 gfc_error ("Need either entity or common block name for "
3559 "attribute specification statement at %C");
3563 /* Save the current identifier and look for more. */
3566 /* Increment the number of identifiers found for this spec stmt. */
3569 /* Make sure we have a sym or com block, and verify that it can
3570 be bind(c). Set the appropriate field(s) and look for more
3572 if (tmp_sym != NULL || com_block != NULL)
3574 if (tmp_sym != NULL)
3576 if (set_verify_bind_c_sym (tmp_sym, num_idents)
3582 if (set_verify_bind_c_com_block(com_block, num_idents)
3587 /* Look to see if we have another identifier. */
3589 if (gfc_match_eos () == MATCH_YES)
3590 found_id = MATCH_NO;
3591 else if (gfc_match_char (',') != MATCH_YES)
3592 found_id = MATCH_NO;
3593 else if (gfc_match_name (name) == MATCH_YES)
3595 found_id = MATCH_YES;
3596 gfc_get_ha_symbol (name, &tmp_sym);
3598 else if (match_common_name (name) == MATCH_YES)
3600 found_id = MATCH_YES;
3601 com_block = gfc_get_common (name, 0);
3605 gfc_error ("Missing entity or common block name for "
3606 "attribute specification statement at %C");
3612 gfc_internal_error ("Missing symbol");
3614 } while (found_id == MATCH_YES);
3616 /* if we get here we were successful */
3621 /* Try and match a BIND(C) attribute specification statement. */
3624 gfc_match_bind_c_stmt (void)
3626 match found_match = MATCH_NO;
3631 /* This may not be necessary. */
3633 /* Clear the temporary binding label holder. */
3634 curr_binding_label[0] = '\0';
3636 /* Look for the bind(c). */
3637 found_match = gfc_match_bind_c (NULL, true);
3639 if (found_match == MATCH_YES)
3641 /* Look for the :: now, but it is not required. */
3644 /* Get the identifier(s) that needs to be updated. This may need to
3645 change to hand the flag(s) for the attr specified so all identifiers
3646 found can have all appropriate parts updated (assuming that the same
3647 spec stmt can have multiple attrs, such as both bind(c) and
3649 if (get_bind_c_idents () != SUCCESS)
3650 /* Error message should have printed already. */
3658 /* Match a data declaration statement. */
3661 gfc_match_data_decl (void)
3667 num_idents_on_line = 0;
3669 m = gfc_match_type_spec (¤t_ts, 0);
3673 if (current_ts.type == BT_DERIVED && gfc_current_state () != COMP_DERIVED)
3675 sym = gfc_use_derived (current_ts.derived);
3683 current_ts.derived = sym;
3686 m = match_attr_spec ();
3687 if (m == MATCH_ERROR)
3693 if (current_ts.type == BT_DERIVED && current_ts.derived->components == NULL
3694 && !current_ts.derived->attr.zero_comp)
3697 if (current_attr.pointer && gfc_current_state () == COMP_DERIVED)
3700 gfc_find_symbol (current_ts.derived->name,
3701 current_ts.derived->ns->parent, 1, &sym);
3703 /* Any symbol that we find had better be a type definition
3704 which has its components defined. */
3705 if (sym != NULL && sym->attr.flavor == FL_DERIVED
3706 && (current_ts.derived->components != NULL
3707 || current_ts.derived->attr.zero_comp))
3710 /* Now we have an error, which we signal, and then fix up
3711 because the knock-on is plain and simple confusing. */
3712 gfc_error_now ("Derived type at %C has not been previously defined "
3713 "and so cannot appear in a derived type definition");
3714 current_attr.pointer = 1;
3719 /* If we have an old-style character declaration, and no new-style
3720 attribute specifications, then there a comma is optional between
3721 the type specification and the variable list. */
3722 if (m == MATCH_NO && current_ts.type == BT_CHARACTER && old_char_selector)
3723 gfc_match_char (',');
3725 /* Give the types/attributes to symbols that follow. Give the element
3726 a number so that repeat character length expressions can be copied. */
3730 num_idents_on_line++;
3731 m = variable_decl (elem++);
3732 if (m == MATCH_ERROR)
3737 if (gfc_match_eos () == MATCH_YES)
3739 if (gfc_match_char (',') != MATCH_YES)
3743 if (gfc_error_flag_test () == 0)
3744 gfc_error ("Syntax error in data declaration at %C");
3747 gfc_free_data_all (gfc_current_ns);
3750 gfc_free_array_spec (current_as);
3756 /* Match a prefix associated with a function or subroutine
3757 declaration. If the typespec pointer is nonnull, then a typespec
3758 can be matched. Note that if nothing matches, MATCH_YES is
3759 returned (the null string was matched). */
3762 gfc_match_prefix (gfc_typespec *ts)
3766 gfc_clear_attr (¤t_attr);
3769 gcc_assert (!gfc_matching_prefix);
3770 gfc_matching_prefix = true;
3773 if (!seen_type && ts != NULL
3774 && gfc_match_type_spec (ts, 0) == MATCH_YES
3775 && gfc_match_space () == MATCH_YES)
3782 if (gfc_match ("elemental% ") == MATCH_YES)
3784 if (gfc_add_elemental (¤t_attr, NULL) == FAILURE)
3790 if (gfc_match ("pure% ") == MATCH_YES)
3792 if (gfc_add_pure (¤t_attr, NULL) == FAILURE)
3798 if (gfc_match ("recursive% ") == MATCH_YES)
3800 if (gfc_add_recursive (¤t_attr, NULL) == FAILURE)
3806 /* At this point, the next item is not a prefix. */
3807 gcc_assert (gfc_matching_prefix);
3808 gfc_matching_prefix = false;
3812 gcc_assert (gfc_matching_prefix);
3813 gfc_matching_prefix = false;
3818 /* Copy attributes matched by gfc_match_prefix() to attributes on a symbol. */
3821 copy_prefix (symbol_attribute *dest, locus *where)
3823 if (current_attr.pure && gfc_add_pure (dest, where) == FAILURE)
3826 if (current_attr.elemental && gfc_add_elemental (dest, where) == FAILURE)
3829 if (current_attr.recursive && gfc_add_recursive (dest, where) == FAILURE)
3836 /* Match a formal argument list. */
3839 gfc_match_formal_arglist (gfc_symbol *progname, int st_flag, int null_flag)
3841 gfc_formal_arglist *head, *tail, *p, *q;
3842 char name[GFC_MAX_SYMBOL_LEN + 1];
3848 if (gfc_match_char ('(') != MATCH_YES)
3855 if (gfc_match_char (')') == MATCH_YES)
3860 if (gfc_match_char ('*') == MATCH_YES)
3864 m = gfc_match_name (name);
3868 if (gfc_get_symbol (name, NULL, &sym))
3872 p = gfc_get_formal_arglist ();
3884 /* We don't add the VARIABLE flavor because the name could be a
3885 dummy procedure. We don't apply these attributes to formal
3886 arguments of statement functions. */
3887 if (sym != NULL && !st_flag
3888 && (gfc_add_dummy (&sym->attr, sym->name, NULL) == FAILURE
3889 || gfc_missing_attr (&sym->attr, NULL) == FAILURE))
3895 /* The name of a program unit can be in a different namespace,
3896 so check for it explicitly. After the statement is accepted,
3897 the name is checked for especially in gfc_get_symbol(). */
3898 if (gfc_new_block != NULL && sym != NULL
3899 && strcmp (sym->name, gfc_new_block->name) == 0)
3901 gfc_error ("Name '%s' at %C is the name of the procedure",
3907 if (gfc_match_char (')') == MATCH_YES)
3910 m = gfc_match_char (',');
3913 gfc_error ("Unexpected junk in formal argument list at %C");
3919 /* Check for duplicate symbols in the formal argument list. */
3922 for (p = head; p->next; p = p->next)
3927 for (q = p->next; q; q = q->next)
3928 if (p->sym == q->sym)
3930 gfc_error ("Duplicate symbol '%s' in formal argument list "
3931 "at %C", p->sym->name);
3939 if (gfc_add_explicit_interface (progname, IFSRC_DECL, head, NULL)
3949 gfc_free_formal_arglist (head);
3954 /* Match a RESULT specification following a function declaration or
3955 ENTRY statement. Also matches the end-of-statement. */
3958 match_result (gfc_symbol *function, gfc_symbol **result)
3960 char name[GFC_MAX_SYMBOL_LEN + 1];
3964 if (gfc_match (" result (") != MATCH_YES)
3967 m = gfc_match_name (name);
3971 /* Get the right paren, and that's it because there could be the
3972 bind(c) attribute after the result clause. */
3973 if (gfc_match_char(')') != MATCH_YES)
3975 /* TODO: should report the missing right paren here. */
3979 if (strcmp (function->name, name) == 0)
3981 gfc_error ("RESULT variable at %C must be different than function name");
3985 if (gfc_get_symbol (name, NULL, &r))
3988 if (gfc_add_flavor (&r->attr, FL_VARIABLE, r->name, NULL) == FAILURE
3989 || gfc_add_result (&r->attr, r->name, NULL) == FAILURE)
3998 /* Match a function suffix, which could be a combination of a result
3999 clause and BIND(C), either one, or neither. The draft does not
4000 require them to come in a specific order. */
4003 gfc_match_suffix (gfc_symbol *sym, gfc_symbol **result)
4005 match is_bind_c; /* Found bind(c). */
4006 match is_result; /* Found result clause. */
4007 match found_match; /* Status of whether we've found a good match. */
4008 char peek_char; /* Character we're going to peek at. */
4009 bool allow_binding_name;
4011 /* Initialize to having found nothing. */
4012 found_match = MATCH_NO;
4013 is_bind_c = MATCH_NO;
4014 is_result = MATCH_NO;
4016 /* Get the next char to narrow between result and bind(c). */
4017 gfc_gobble_whitespace ();
4018 peek_char = gfc_peek_ascii_char ();
4020 /* C binding names are not allowed for internal procedures. */
4021 if (gfc_current_state () == COMP_CONTAINS
4022 && sym->ns->proc_name->attr.flavor != FL_MODULE)
4023 allow_binding_name = false;
4025 allow_binding_name = true;
4030 /* Look for result clause. */
4031 is_result = match_result (sym, result);
4032 if (is_result == MATCH_YES)
4034 /* Now see if there is a bind(c) after it. */
4035 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
4036 /* We've found the result clause and possibly bind(c). */
4037 found_match = MATCH_YES;
4040 /* This should only be MATCH_ERROR. */
4041 found_match = is_result;
4044 /* Look for bind(c) first. */
4045 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
4046 if (is_bind_c == MATCH_YES)
4048 /* Now see if a result clause followed it. */
4049 is_result = match_result (sym, result);
4050 found_match = MATCH_YES;
4054 /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */
4055 found_match = MATCH_ERROR;
4059 gfc_error ("Unexpected junk after function declaration at %C");
4060 found_match = MATCH_ERROR;
4064 if (is_bind_c == MATCH_YES)
4066 /* Fortran 2008 draft allows BIND(C) for internal procedures. */
4067 if (gfc_current_state () == COMP_CONTAINS
4068 && sym->ns->proc_name->attr.flavor != FL_MODULE
4069 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute "
4070 "at %L may not be specified for an internal "
4071 "procedure", &gfc_current_locus)
4075 if (gfc_add_is_bind_c (&(sym->attr), sym->name, &gfc_current_locus, 1)
4084 /* Match a PROCEDURE declaration (R1211). */
4087 match_procedure_decl (void)
4090 locus old_loc, entry_loc;
4091 gfc_symbol *sym, *proc_if = NULL;
4093 gfc_expr *initializer = NULL;
4095 old_loc = entry_loc = gfc_current_locus;
4097 gfc_clear_ts (¤t_ts);
4099 if (gfc_match (" (") != MATCH_YES)
4101 gfc_current_locus = entry_loc;
4105 /* Get the type spec. for the procedure interface. */
4106 old_loc = gfc_current_locus;
4107 m = gfc_match_type_spec (¤t_ts, 0);
4108 if (m == MATCH_YES || (m == MATCH_NO && gfc_peek_ascii_char () == ')'))
4111 if (m == MATCH_ERROR)
4114 gfc_current_locus = old_loc;
4116 /* Get the name of the procedure or abstract interface
4117 to inherit the interface from. */
4118 m = gfc_match_symbol (&proc_if, 1);
4122 else if (m == MATCH_ERROR)
4125 /* Various interface checks. */
4129 /* Resolve interface if possible. That way, attr.procedure is only set
4130 if it is declared by a later procedure-declaration-stmt, which is
4131 invalid per C1212. */
4132 while (proc_if->ts.interface)
4133 proc_if = proc_if->ts.interface;
4135 if (proc_if->generic)
4137 gfc_error ("Interface '%s' at %C may not be generic", proc_if->name);
4140 if (proc_if->attr.proc == PROC_ST_FUNCTION)
4142 gfc_error ("Interface '%s' at %C may not be a statement function",
4146 /* Handle intrinsic procedures. */
4147 if (!(proc_if->attr.external || proc_if->attr.use_assoc
4148 || proc_if->attr.if_source == IFSRC_IFBODY)
4149 && (gfc_is_intrinsic (proc_if, 0, gfc_current_locus)
4150 || gfc_is_intrinsic (proc_if, 1, gfc_current_locus)))
4151 proc_if->attr.intrinsic = 1;
4152 if (proc_if->attr.intrinsic
4153 && !gfc_intrinsic_actual_ok (proc_if->name, 0))
4155 gfc_error ("Intrinsic procedure '%s' not allowed "
4156 "in PROCEDURE statement at %C", proc_if->name);
4162 if (gfc_match (" )") != MATCH_YES)
4164 gfc_current_locus = entry_loc;
4168 /* Parse attributes. */
4169 m = match_attr_spec();
4170 if (m == MATCH_ERROR)
4173 /* Get procedure symbols. */
4176 m = gfc_match_symbol (&sym, 0);
4179 else if (m == MATCH_ERROR)
4182 /* Add current_attr to the symbol attributes. */
4183 if (gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE)
4186 if (sym->attr.is_bind_c)
4188 /* Check for C1218. */
4189 if (!proc_if || !proc_if->attr.is_bind_c)
4191 gfc_error ("BIND(C) attribute at %C requires "
4192 "an interface with BIND(C)");
4195 /* Check for C1217. */
4196 if (has_name_equals && sym->attr.pointer)
4198 gfc_error ("BIND(C) procedure with NAME may not have "
4199 "POINTER attribute at %C");
4202 if (has_name_equals && sym->attr.dummy)
4204 gfc_error ("Dummy procedure at %C may not have "
4205 "BIND(C) attribute with NAME");
4208 /* Set binding label for BIND(C). */
4209 if (set_binding_label (sym->binding_label, sym->name, num) != SUCCESS)
4213 if (gfc_add_external (&sym->attr, NULL) == FAILURE)
4215 if (gfc_add_proc (&sym->attr, sym->name, NULL) == FAILURE)
4218 /* Set interface. */
4219 if (proc_if != NULL)
4221 sym->ts.interface = proc_if;
4222 sym->attr.untyped = 1;
4224 else if (current_ts.type != BT_UNKNOWN)
4226 sym->ts = current_ts;
4227 sym->ts.interface = gfc_new_symbol ("", gfc_current_ns);
4228 sym->ts.interface->ts = current_ts;
4229 sym->ts.interface->attr.function = 1;
4230 sym->attr.function = sym->ts.interface->attr.function;
4233 if (gfc_match (" =>") == MATCH_YES)
4235 if (!current_attr.pointer)
4237 gfc_error ("Initialization at %C isn't for a pointer variable");
4242 m = gfc_match_null (&initializer);
4245 gfc_error ("Pointer initialization requires a NULL() at %C");
4249 if (gfc_pure (NULL))
4251 gfc_error ("Initialization of pointer at %C is not allowed in "
4252 "a PURE procedure");
4259 if (add_init_expr_to_sym (sym->name, &initializer, &gfc_current_locus)
4265 gfc_set_sym_referenced (sym);
4267 if (gfc_match_eos () == MATCH_YES)
4269 if (gfc_match_char (',') != MATCH_YES)
4274 gfc_error ("Syntax error in PROCEDURE statement at %C");
4278 /* Free stuff up and return. */
4279 gfc_free_expr (initializer);
4284 /* Match a PROCEDURE declaration inside an interface (R1206). */
4287 match_procedure_in_interface (void)
4291 char name[GFC_MAX_SYMBOL_LEN + 1];
4293 if (current_interface.type == INTERFACE_NAMELESS
4294 || current_interface.type == INTERFACE_ABSTRACT)
4296 gfc_error ("PROCEDURE at %C must be in a generic interface");
4302 m = gfc_match_name (name);
4305 else if (m == MATCH_ERROR)
4307 if (gfc_get_symbol (name, gfc_current_ns->parent, &sym))
4310 if (gfc_add_interface (sym) == FAILURE)
4313 if (gfc_match_eos () == MATCH_YES)
4315 if (gfc_match_char (',') != MATCH_YES)
4322 gfc_error ("Syntax error in PROCEDURE statement at %C");
4327 /* General matcher for PROCEDURE declarations. */
4329 static match match_procedure_in_type (void);
4332 gfc_match_procedure (void)
4336 switch (gfc_current_state ())
4341 case COMP_SUBROUTINE:
4343 m = match_procedure_decl ();
4345 case COMP_INTERFACE:
4346 m = match_procedure_in_interface ();
4349 gfc_error ("Fortran 2003: Procedure components at %C are not yet"
4350 " implemented in gfortran");
4352 case COMP_DERIVED_CONTAINS:
4353 m = match_procedure_in_type ();
4362 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROCEDURE statement at %C")
4370 /* Warn if a matched procedure has the same name as an intrinsic; this is
4371 simply a wrapper around gfc_warn_intrinsic_shadow that interprets the current
4372 parser-state-stack to find out whether we're in a module. */
4375 warn_intrinsic_shadow (const gfc_symbol* sym, bool func)
4379 in_module = (gfc_state_stack->previous
4380 && gfc_state_stack->previous->state == COMP_MODULE);
4382 gfc_warn_intrinsic_shadow (sym, in_module, func);
4386 /* Match a function declaration. */
4389 gfc_match_function_decl (void)
4391 char name[GFC_MAX_SYMBOL_LEN + 1];
4392 gfc_symbol *sym, *result;
4396 match found_match; /* Status returned by match func. */
4398 if (gfc_current_state () != COMP_NONE
4399 && gfc_current_state () != COMP_INTERFACE
4400 && gfc_current_state () != COMP_CONTAINS)
4403 gfc_clear_ts (¤t_ts);
4405 old_loc = gfc_current_locus;
4407 m = gfc_match_prefix (¤t_ts);
4410 gfc_current_locus = old_loc;
4414 if (gfc_match ("function% %n", name) != MATCH_YES)
4416 gfc_current_locus = old_loc;
4419 if (get_proc_name (name, &sym, false))
4421 gfc_new_block = sym;
4423 m = gfc_match_formal_arglist (sym, 0, 0);
4426 gfc_error ("Expected formal argument list in function "
4427 "definition at %C");
4431 else if (m == MATCH_ERROR)
4436 /* According to the draft, the bind(c) and result clause can
4437 come in either order after the formal_arg_list (i.e., either
4438 can be first, both can exist together or by themselves or neither
4439 one). Therefore, the match_result can't match the end of the
4440 string, and check for the bind(c) or result clause in either order. */
4441 found_match = gfc_match_eos ();
4443 /* Make sure that it isn't already declared as BIND(C). If it is, it
4444 must have been marked BIND(C) with a BIND(C) attribute and that is
4445 not allowed for procedures. */
4446 if (sym->attr.is_bind_c == 1)
4448 sym->attr.is_bind_c = 0;
4449 if (sym->old_symbol != NULL)
4450 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4451 "variables or common blocks",
4452 &(sym->old_symbol->declared_at));
4454 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4455 "variables or common blocks", &gfc_current_locus);
4458 if (found_match != MATCH_YES)
4460 /* If we haven't found the end-of-statement, look for a suffix. */
4461 suffix_match = gfc_match_suffix (sym, &result);
4462 if (suffix_match == MATCH_YES)
4463 /* Need to get the eos now. */
4464 found_match = gfc_match_eos ();
4466 found_match = suffix_match;
4469 if(found_match != MATCH_YES)
4473 /* Make changes to the symbol. */
4476 if (gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE)
4479 if (gfc_missing_attr (&sym->attr, NULL) == FAILURE
4480 || copy_prefix (&sym->attr, &sym->declared_at) == FAILURE)
4483 if (current_ts.type != BT_UNKNOWN && sym->ts.type != BT_UNKNOWN
4484 && !sym->attr.implicit_type)
4486 gfc_error ("Function '%s' at %C already has a type of %s", name,
4487 gfc_basic_typename (sym->ts.type));
4491 /* Delay matching the function characteristics until after the
4492 specification block by signalling kind=-1. */
4493 sym->declared_at = old_loc;
4494 if (current_ts.type != BT_UNKNOWN)
4495 current_ts.kind = -1;
4497 current_ts.kind = 0;
4501 sym->ts = current_ts;
4506 result->ts = current_ts;
4507 sym->result = result;
4510 /* Warn if this procedure has the same name as an intrinsic. */
4511 warn_intrinsic_shadow (sym, true);
4517 gfc_current_locus = old_loc;
4522 /* This is mostly a copy of parse.c(add_global_procedure) but modified to
4523 pass the name of the entry, rather than the gfc_current_block name, and
4524 to return false upon finding an existing global entry. */
4527 add_global_entry (const char *name, int sub)
4532 s = gfc_get_gsymbol(name);
4533 type = sub ? GSYM_SUBROUTINE : GSYM_FUNCTION;
4536 || (s->type != GSYM_UNKNOWN
4537 && s->type != type))
4538 gfc_global_used(s, NULL);
4542 s->where = gfc_current_locus;
4550 /* Match an ENTRY statement. */
4553 gfc_match_entry (void)
4558 char name[GFC_MAX_SYMBOL_LEN + 1];
4559 gfc_compile_state state;
4563 bool module_procedure;
4567 m = gfc_match_name (name);
4571 state = gfc_current_state ();
4572 if (state != COMP_SUBROUTINE && state != COMP_FUNCTION)
4577 gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM");
4580 gfc_error ("ENTRY statement at %C cannot appear within a MODULE");
4582 case COMP_BLOCK_DATA:
4583 gfc_error ("ENTRY statement at %C cannot appear within "
4586 case COMP_INTERFACE:
4587 gfc_error ("ENTRY statement at %C cannot appear within "
4591 gfc_error ("ENTRY statement at %C cannot appear within "
4592 "a DERIVED TYPE block");
4595 gfc_error ("ENTRY statement at %C cannot appear within "
4596 "an IF-THEN block");
4599 gfc_error ("ENTRY statement at %C cannot appear within "
4603 gfc_error ("ENTRY statement at %C cannot appear within "
4607 gfc_error ("ENTRY statement at %C cannot appear within "
4611 gfc_error ("ENTRY statement at %C cannot appear within "
4615 gfc_error ("ENTRY statement at %C cannot appear within "
4616 "a contained subprogram");
4619 gfc_internal_error ("gfc_match_entry(): Bad state");
4624 module_procedure = gfc_current_ns->parent != NULL
4625 && gfc_current_ns->parent->proc_name
4626 && gfc_current_ns->parent->proc_name->attr.flavor
4629 if (gfc_current_ns->parent != NULL
4630 && gfc_current_ns->parent->proc_name
4631 && !module_procedure)
4633 gfc_error("ENTRY statement at %C cannot appear in a "
4634 "contained procedure");
4638 /* Module function entries need special care in get_proc_name
4639 because previous references within the function will have
4640 created symbols attached to the current namespace. */
4641 if (get_proc_name (name, &entry,
4642 gfc_current_ns->parent != NULL
4643 && module_procedure))
4646 proc = gfc_current_block ();
4648 /* Make sure that it isn't already declared as BIND(C). If it is, it
4649 must have been marked BIND(C) with a BIND(C) attribute and that is
4650 not allowed for procedures. */
4651 if (entry->attr.is_bind_c == 1)
4653 entry->attr.is_bind_c = 0;
4654 if (entry->old_symbol != NULL)
4655 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4656 "variables or common blocks",
4657 &(entry->old_symbol->declared_at));
4659 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4660 "variables or common blocks", &gfc_current_locus);
4663 /* Check what next non-whitespace character is so we can tell if there
4664 is the required parens if we have a BIND(C). */
4665 gfc_gobble_whitespace ();
4666 peek_char = gfc_peek_ascii_char ();
4668 if (state == COMP_SUBROUTINE)
4670 /* An entry in a subroutine. */
4671 if (!gfc_current_ns->parent && !add_global_entry (name, 1))
4674 m = gfc_match_formal_arglist (entry, 0, 1);
4678 /* Call gfc_match_bind_c with allow_binding_name = true as ENTRY can
4679 never be an internal procedure. */
4680 is_bind_c = gfc_match_bind_c (entry, true);
4681 if (is_bind_c == MATCH_ERROR)
4683 if (is_bind_c == MATCH_YES)
4685 if (peek_char != '(')
4687 gfc_error ("Missing required parentheses before BIND(C) at %C");
4690 if (gfc_add_is_bind_c (&(entry->attr), entry->name, &(entry->declared_at), 1)
4695 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
4696 || gfc_add_subroutine (&entry->attr, entry->name, NULL) == FAILURE)
4701 /* An entry in a function.
4702 We need to take special care because writing
4707 ENTRY f() RESULT (r)
4709 ENTRY f RESULT (r). */
4710 if (!gfc_current_ns->parent && !add_global_entry (name, 0))
4713 old_loc = gfc_current_locus;
4714 if (gfc_match_eos () == MATCH_YES)
4716 gfc_current_locus = old_loc;
4717 /* Match the empty argument list, and add the interface to
4719 m = gfc_match_formal_arglist (entry, 0, 1);
4722 m = gfc_match_formal_arglist (entry, 0, 0);
4729 if (gfc_match_eos () == MATCH_YES)
4731 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
4732 || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE)
4735 entry->result = entry;
4739 m = gfc_match_suffix (entry, &result);
4741 gfc_syntax_error (ST_ENTRY);
4747 if (gfc_add_result (&result->attr, result->name, NULL) == FAILURE
4748 || gfc_add_entry (&entry->attr, result->name, NULL) == FAILURE
4749 || gfc_add_function (&entry->attr, result->name, NULL)
4752 entry->result = result;
4756 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
4757 || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE)
4759 entry->result = entry;
4764 if (gfc_match_eos () != MATCH_YES)
4766 gfc_syntax_error (ST_ENTRY);
4770 entry->attr.recursive = proc->attr.recursive;
4771 entry->attr.elemental = proc->attr.elemental;
4772 entry->attr.pure = proc->attr.pure;
4774 el = gfc_get_entry_list ();
4776 el->next = gfc_current_ns->entries;
4777 gfc_current_ns->entries = el;
4779 el->id = el->next->id + 1;
4783 new_st.op = EXEC_ENTRY;
4784 new_st.ext.entry = el;
4790 /* Match a subroutine statement, including optional prefixes. */
4793 gfc_match_subroutine (void)
4795 char name[GFC_MAX_SYMBOL_LEN + 1];
4800 bool allow_binding_name;
4802 if (gfc_current_state () != COMP_NONE
4803 && gfc_current_state () != COMP_INTERFACE
4804 && gfc_current_state () != COMP_CONTAINS)
4807 m = gfc_match_prefix (NULL);
4811 m = gfc_match ("subroutine% %n", name);
4815 if (get_proc_name (name, &sym, false))
4817 gfc_new_block = sym;
4819 /* Check what next non-whitespace character is so we can tell if there
4820 is the required parens if we have a BIND(C). */
4821 gfc_gobble_whitespace ();
4822 peek_char = gfc_peek_ascii_char ();
4824 if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE)
4827 if (gfc_match_formal_arglist (sym, 0, 1) != MATCH_YES)
4830 /* Make sure that it isn't already declared as BIND(C). If it is, it
4831 must have been marked BIND(C) with a BIND(C) attribute and that is
4832 not allowed for procedures. */
4833 if (sym->attr.is_bind_c == 1)
4835 sym->attr.is_bind_c = 0;
4836 if (sym->old_symbol != NULL)
4837 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4838 "variables or common blocks",
4839 &(sym->old_symbol->declared_at));
4841 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4842 "variables or common blocks", &gfc_current_locus);
4845 /* C binding names are not allowed for internal procedures. */
4846 if (gfc_current_state () == COMP_CONTAINS
4847 && sym->ns->proc_name->attr.flavor != FL_MODULE)
4848 allow_binding_name = false;
4850 allow_binding_name = true;
4852 /* Here, we are just checking if it has the bind(c) attribute, and if
4853 so, then we need to make sure it's all correct. If it doesn't,
4854 we still need to continue matching the rest of the subroutine line. */
4855 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
4856 if (is_bind_c == MATCH_ERROR)
4858 /* There was an attempt at the bind(c), but it was wrong. An
4859 error message should have been printed w/in the gfc_match_bind_c
4860 so here we'll just return the MATCH_ERROR. */
4864 if (is_bind_c == MATCH_YES)
4866 /* The following is allowed in the Fortran 2008 draft. */
4867 if (gfc_current_state () == COMP_CONTAINS
4868 && sym->ns->proc_name->attr.flavor != FL_MODULE
4869 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute "
4870 "at %L may not be specified for an internal "
4871 "procedure", &gfc_current_locus)
4875 if (peek_char != '(')
4877 gfc_error ("Missing required parentheses before BIND(C) at %C");
4880 if (gfc_add_is_bind_c (&(sym->attr), sym->name, &(sym->declared_at), 1)
4885 if (gfc_match_eos () != MATCH_YES)
4887 gfc_syntax_error (ST_SUBROUTINE);
4891 if (copy_prefix (&sym->attr, &sym->declared_at) == FAILURE)
4894 /* Warn if it has the same name as an intrinsic. */
4895 warn_intrinsic_shadow (sym, false);
4901 /* Match a BIND(C) specifier, with the optional 'name=' specifier if
4902 given, and set the binding label in either the given symbol (if not
4903 NULL), or in the current_ts. The symbol may be NULL because we may
4904 encounter the BIND(C) before the declaration itself. Return
4905 MATCH_NO if what we're looking at isn't a BIND(C) specifier,
4906 MATCH_ERROR if it is a BIND(C) clause but an error was encountered,
4907 or MATCH_YES if the specifier was correct and the binding label and
4908 bind(c) fields were set correctly for the given symbol or the
4909 current_ts. If allow_binding_name is false, no binding name may be
4913 gfc_match_bind_c (gfc_symbol *sym, bool allow_binding_name)
4915 /* binding label, if exists */
4916 char binding_label[GFC_MAX_SYMBOL_LEN + 1];
4920 /* Initialize the flag that specifies whether we encountered a NAME=
4921 specifier or not. */
4922 has_name_equals = 0;
4924 /* Init the first char to nil so we can catch if we don't have
4925 the label (name attr) or the symbol name yet. */
4926 binding_label[0] = '\0';
4928 /* This much we have to be able to match, in this order, if
4929 there is a bind(c) label. */
4930 if (gfc_match (" bind ( c ") != MATCH_YES)
4933 /* Now see if there is a binding label, or if we've reached the
4934 end of the bind(c) attribute without one. */
4935 if (gfc_match_char (',') == MATCH_YES)
4937 if (gfc_match (" name = ") != MATCH_YES)
4939 gfc_error ("Syntax error in NAME= specifier for binding label "
4941 /* should give an error message here */
4945 has_name_equals = 1;
4947 /* Get the opening quote. */
4948 double_quote = MATCH_YES;
4949 single_quote = MATCH_YES;
4950 double_quote = gfc_match_char ('"');
4951 if (double_quote != MATCH_YES)
4952 single_quote = gfc_match_char ('\'');
4953 if (double_quote != MATCH_YES && single_quote != MATCH_YES)
4955 gfc_error ("Syntax error in NAME= specifier for binding label "
4960 /* Grab the binding label, using functions that will not lower
4961 case the names automatically. */
4962 if (gfc_match_name_C (binding_label) != MATCH_YES)
4965 /* Get the closing quotation. */
4966 if (double_quote == MATCH_YES)
4968 if (gfc_match_char ('"') != MATCH_YES)
4970 gfc_error ("Missing closing quote '\"' for binding label at %C");
4971 /* User started string with '"' so looked to match it. */
4977 if (gfc_match_char ('\'') != MATCH_YES)
4979 gfc_error ("Missing closing quote '\'' for binding label at %C");
4980 /* User started string with "'" char. */
4986 /* Get the required right paren. */
4987 if (gfc_match_char (')') != MATCH_YES)
4989 gfc_error ("Missing closing paren for binding label at %C");
4993 if (has_name_equals && !allow_binding_name)
4995 gfc_error ("No binding name is allowed in BIND(C) at %C");
4999 if (has_name_equals && sym != NULL && sym->attr.dummy)
5001 gfc_error ("For dummy procedure %s, no binding name is "
5002 "allowed in BIND(C) at %C", sym->name);
5007 /* Save the binding label to the symbol. If sym is null, we're
5008 probably matching the typespec attributes of a declaration and
5009 haven't gotten the name yet, and therefore, no symbol yet. */
5010 if (binding_label[0] != '\0')
5014 strcpy (sym->binding_label, binding_label);
5017 strcpy (curr_binding_label, binding_label);
5019 else if (allow_binding_name)
5021 /* No binding label, but if symbol isn't null, we
5022 can set the label for it here.
5023 If name="" or allow_binding_name is false, no C binding name is
5025 if (sym != NULL && sym->name != NULL && has_name_equals == 0)
5026 strncpy (sym->binding_label, sym->name, strlen (sym->name) + 1);
5029 if (has_name_equals && gfc_current_state () == COMP_INTERFACE
5030 && current_interface.type == INTERFACE_ABSTRACT)
5032 gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C");
5040 /* Return nonzero if we're currently compiling a contained procedure. */
5043 contained_procedure (void)
5045 gfc_state_data *s = gfc_state_stack;
5047 if ((s->state == COMP_SUBROUTINE || s->state == COMP_FUNCTION)
5048 && s->previous != NULL && s->previous->state == COMP_CONTAINS)
5054 /* Set the kind of each enumerator. The kind is selected such that it is
5055 interoperable with the corresponding C enumeration type, making
5056 sure that -fshort-enums is honored. */
5061 enumerator_history *current_history = NULL;
5065 if (max_enum == NULL || enum_history == NULL)
5068 if (!gfc_option.fshort_enums)
5074 kind = gfc_integer_kinds[i++].kind;
5076 while (kind < gfc_c_int_kind
5077 && gfc_check_integer_range (max_enum->initializer->value.integer,
5080 current_history = enum_history;
5081 while (current_history != NULL)
5083 current_history->sym->ts.kind = kind;
5084 current_history = current_history->next;
5089 /* Match any of the various end-block statements. Returns the type of
5090 END to the caller. The END INTERFACE, END IF, END DO and END
5091 SELECT statements cannot be replaced by a single END statement. */
5094 gfc_match_end (gfc_statement *st)
5096 char name[GFC_MAX_SYMBOL_LEN + 1];
5097 gfc_compile_state state;
5099 const char *block_name;
5104 old_loc = gfc_current_locus;
5105 if (gfc_match ("end") != MATCH_YES)
5108 state = gfc_current_state ();
5109 block_name = gfc_current_block () == NULL
5110 ? NULL : gfc_current_block ()->name;
5112 if (state == COMP_CONTAINS || state == COMP_DERIVED_CONTAINS)
5114 state = gfc_state_stack->previous->state;
5115 block_name = gfc_state_stack->previous->sym == NULL
5116 ? NULL : gfc_state_stack->previous->sym->name;
5123 *st = ST_END_PROGRAM;
5124 target = " program";
5128 case COMP_SUBROUTINE:
5129 *st = ST_END_SUBROUTINE;
5130 target = " subroutine";
5131 eos_ok = !contained_procedure ();
5135 *st = ST_END_FUNCTION;
5136 target = " function";
5137 eos_ok = !contained_procedure ();
5140 case COMP_BLOCK_DATA:
5141 *st = ST_END_BLOCK_DATA;
5142 target = " block data";
5147 *st = ST_END_MODULE;
5152 case COMP_INTERFACE:
5153 *st = ST_END_INTERFACE;
5154 target = " interface";
5159 case COMP_DERIVED_CONTAINS:
5178 *st = ST_END_SELECT;
5184 *st = ST_END_FORALL;
5199 last_initializer = NULL;
5201 gfc_free_enum_history ();
5205 gfc_error ("Unexpected END statement at %C");
5209 if (gfc_match_eos () == MATCH_YES)
5213 /* We would have required END [something]. */
5214 gfc_error ("%s statement expected at %L",
5215 gfc_ascii_statement (*st), &old_loc);
5222 /* Verify that we've got the sort of end-block that we're expecting. */
5223 if (gfc_match (target) != MATCH_YES)
5225 gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st));
5229 /* If we're at the end, make sure a block name wasn't required. */
5230 if (gfc_match_eos () == MATCH_YES)
5233 if (*st != ST_ENDDO && *st != ST_ENDIF && *st != ST_END_SELECT
5234 && *st != ST_END_FORALL && *st != ST_END_WHERE)
5237 if (gfc_current_block () == NULL)
5240 gfc_error ("Expected block name of '%s' in %s statement at %C",
5241 block_name, gfc_ascii_statement (*st));
5246 /* END INTERFACE has a special handler for its several possible endings. */
5247 if (*st == ST_END_INTERFACE)
5248 return gfc_match_end_interface ();
5250 /* We haven't hit the end of statement, so what is left must be an
5252 m = gfc_match_space ();
5254 m = gfc_match_name (name);
5257 gfc_error ("Expected terminating name at %C");
5261 if (block_name == NULL)
5264 if (strcmp (name, block_name) != 0)
5266 gfc_error ("Expected label '%s' for %s statement at %C", block_name,
5267 gfc_ascii_statement (*st));
5271 if (gfc_match_eos () == MATCH_YES)
5275 gfc_syntax_error (*st);
5278 gfc_current_locus = old_loc;
5284 /***************** Attribute declaration statements ****************/
5286 /* Set the attribute of a single variable. */
5291 char name[GFC_MAX_SYMBOL_LEN + 1];
5299 m = gfc_match_name (name);
5303 if (find_special (name, &sym))
5306 var_locus = gfc_current_locus;
5308 /* Deal with possible array specification for certain attributes. */
5309 if (current_attr.dimension
5310 || current_attr.allocatable
5311 || current_attr.pointer
5312 || current_attr.target)
5314 m = gfc_match_array_spec (&as);
5315 if (m == MATCH_ERROR)
5318 if (current_attr.dimension && m == MATCH_NO)
5320 gfc_error ("Missing array specification at %L in DIMENSION "
5321 "statement", &var_locus);
5326 if (current_attr.dimension && sym->value)
5328 gfc_error ("Dimensions specified for %s at %L after its "
5329 "initialisation", sym->name, &var_locus);
5334 if ((current_attr.allocatable || current_attr.pointer)
5335 && (m == MATCH_YES) && (as->type != AS_DEFERRED))
5337 gfc_error ("Array specification must be deferred at %L", &var_locus);
5343 /* Update symbol table. DIMENSION attribute is set
5344 in gfc_set_array_spec(). */
5345 if (current_attr.dimension == 0
5346 && gfc_copy_attr (&sym->attr, ¤t_attr, &var_locus) == FAILURE)
5352 if (gfc_set_array_spec (sym, as, &var_locus) == FAILURE)
5358 if (sym->attr.cray_pointee && sym->as != NULL)
5360 /* Fix the array spec. */
5361 m = gfc_mod_pointee_as (sym->as);
5362 if (m == MATCH_ERROR)
5366 if (gfc_add_attribute (&sym->attr, &var_locus) == FAILURE)
5372 if ((current_attr.external || current_attr.intrinsic)
5373 && sym->attr.flavor != FL_PROCEDURE
5374 && gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL) == FAILURE)
5383 gfc_free_array_spec (as);
5388 /* Generic attribute declaration subroutine. Used for attributes that
5389 just have a list of names. */
5396 /* Gobble the optional double colon, by simply ignoring the result
5406 if (gfc_match_eos () == MATCH_YES)
5412 if (gfc_match_char (',') != MATCH_YES)
5414 gfc_error ("Unexpected character in variable list at %C");
5424 /* This routine matches Cray Pointer declarations of the form:
5425 pointer ( <pointer>, <pointee> )
5427 pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ...
5428 The pointer, if already declared, should be an integer. Otherwise, we
5429 set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may
5430 be either a scalar, or an array declaration. No space is allocated for
5431 the pointee. For the statement
5432 pointer (ipt, ar(10))
5433 any subsequent uses of ar will be translated (in C-notation) as
5434 ar(i) => ((<type> *) ipt)(i)
5435 After gimplification, pointee variable will disappear in the code. */
5438 cray_pointer_decl (void)
5442 gfc_symbol *cptr; /* Pointer symbol. */
5443 gfc_symbol *cpte; /* Pointee symbol. */
5449 if (gfc_match_char ('(') != MATCH_YES)
5451 gfc_error ("Expected '(' at %C");
5455 /* Match pointer. */
5456 var_locus = gfc_current_locus;
5457 gfc_clear_attr (¤t_attr);
5458 gfc_add_cray_pointer (¤t_attr, &var_locus);
5459 current_ts.type = BT_INTEGER;
5460 current_ts.kind = gfc_index_integer_kind;
5462 m = gfc_match_symbol (&cptr, 0);
5465 gfc_error ("Expected variable name at %C");
5469 if (gfc_add_cray_pointer (&cptr->attr, &var_locus) == FAILURE)
5472 gfc_set_sym_referenced (cptr);
5474 if (cptr->ts.type == BT_UNKNOWN) /* Override the type, if necessary. */
5476 cptr->ts.type = BT_INTEGER;
5477 cptr->ts.kind = gfc_index_integer_kind;
5479 else if (cptr->ts.type != BT_INTEGER)
5481 gfc_error ("Cray pointer at %C must be an integer");
5484 else if (cptr->ts.kind < gfc_index_integer_kind)
5485 gfc_warning ("Cray pointer at %C has %d bytes of precision;"
5486 " memory addresses require %d bytes",
5487 cptr->ts.kind, gfc_index_integer_kind);
5489 if (gfc_match_char (',') != MATCH_YES)
5491 gfc_error ("Expected \",\" at %C");
5495 /* Match Pointee. */
5496 var_locus = gfc_current_locus;
5497 gfc_clear_attr (¤t_attr);
5498 gfc_add_cray_pointee (¤t_attr, &var_locus);
5499 current_ts.type = BT_UNKNOWN;
5500 current_ts.kind = 0;
5502 m = gfc_match_symbol (&cpte, 0);
5505 gfc_error ("Expected variable name at %C");
5509 /* Check for an optional array spec. */
5510 m = gfc_match_array_spec (&as);
5511 if (m == MATCH_ERROR)
5513 gfc_free_array_spec (as);
5516 else if (m == MATCH_NO)
5518 gfc_free_array_spec (as);
5522 if (gfc_add_cray_pointee (&cpte->attr, &var_locus) == FAILURE)
5525 gfc_set_sym_referenced (cpte);
5527 if (cpte->as == NULL)
5529 if (gfc_set_array_spec (cpte, as, &var_locus) == FAILURE)
5530 gfc_internal_error ("Couldn't set Cray pointee array spec.");
5532 else if (as != NULL)
5534 gfc_error ("Duplicate array spec for Cray pointee at %C");
5535 gfc_free_array_spec (as);
5541 if (cpte->as != NULL)
5543 /* Fix array spec. */
5544 m = gfc_mod_pointee_as (cpte->as);
5545 if (m == MATCH_ERROR)
5549 /* Point the Pointee at the Pointer. */
5550 cpte->cp_pointer = cptr;
5552 if (gfc_match_char (')') != MATCH_YES)
5554 gfc_error ("Expected \")\" at %C");
5557 m = gfc_match_char (',');
5559 done = true; /* Stop searching for more declarations. */
5563 if (m == MATCH_ERROR /* Failed when trying to find ',' above. */
5564 || gfc_match_eos () != MATCH_YES)
5566 gfc_error ("Expected \",\" or end of statement at %C");
5574 gfc_match_external (void)
5577 gfc_clear_attr (¤t_attr);
5578 current_attr.external = 1;
5580 return attr_decl ();
5585 gfc_match_intent (void)
5589 intent = match_intent_spec ();
5590 if (intent == INTENT_UNKNOWN)
5593 gfc_clear_attr (¤t_attr);
5594 current_attr.intent = intent;
5596 return attr_decl ();
5601 gfc_match_intrinsic (void)
5604 gfc_clear_attr (¤t_attr);
5605 current_attr.intrinsic = 1;
5607 return attr_decl ();
5612 gfc_match_optional (void)
5615 gfc_clear_attr (¤t_attr);
5616 current_attr.optional = 1;
5618 return attr_decl ();
5623 gfc_match_pointer (void)
5625 gfc_gobble_whitespace ();
5626 if (gfc_peek_ascii_char () == '(')
5628 if (!gfc_option.flag_cray_pointer)
5630 gfc_error ("Cray pointer declaration at %C requires -fcray-pointer "
5634 return cray_pointer_decl ();
5638 gfc_clear_attr (¤t_attr);
5639 current_attr.pointer = 1;
5641 return attr_decl ();
5647 gfc_match_allocatable (void)
5649 gfc_clear_attr (¤t_attr);
5650 current_attr.allocatable = 1;
5652 return attr_decl ();
5657 gfc_match_dimension (void)
5659 gfc_clear_attr (¤t_attr);
5660 current_attr.dimension = 1;
5662 return attr_decl ();
5667 gfc_match_target (void)
5669 gfc_clear_attr (¤t_attr);
5670 current_attr.target = 1;
5672 return attr_decl ();
5676 /* Match the list of entities being specified in a PUBLIC or PRIVATE
5680 access_attr_decl (gfc_statement st)
5682 char name[GFC_MAX_SYMBOL_LEN + 1];
5683 interface_type type;
5686 gfc_intrinsic_op op;
5689 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
5694 m = gfc_match_generic_spec (&type, name, &op);
5697 if (m == MATCH_ERROR)
5702 case INTERFACE_NAMELESS:
5703 case INTERFACE_ABSTRACT:
5706 case INTERFACE_GENERIC:
5707 if (gfc_get_symbol (name, NULL, &sym))
5710 if (gfc_add_access (&sym->attr, (st == ST_PUBLIC)
5711 ? ACCESS_PUBLIC : ACCESS_PRIVATE,
5712 sym->name, NULL) == FAILURE)
5717 case INTERFACE_INTRINSIC_OP:
5718 if (gfc_current_ns->operator_access[op] == ACCESS_UNKNOWN)
5720 gfc_current_ns->operator_access[op] =
5721 (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE;
5725 gfc_error ("Access specification of the %s operator at %C has "
5726 "already been specified", gfc_op2string (op));
5732 case INTERFACE_USER_OP:
5733 uop = gfc_get_uop (name);
5735 if (uop->access == ACCESS_UNKNOWN)
5737 uop->access = (st == ST_PUBLIC)
5738 ? ACCESS_PUBLIC : ACCESS_PRIVATE;
5742 gfc_error ("Access specification of the .%s. operator at %C "
5743 "has already been specified", sym->name);
5750 if (gfc_match_char (',') == MATCH_NO)
5754 if (gfc_match_eos () != MATCH_YES)
5759 gfc_syntax_error (st);
5767 gfc_match_protected (void)
5772 if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE)
5774 gfc_error ("PROTECTED at %C only allowed in specification "
5775 "part of a module");
5780 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED statement at %C")
5784 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
5789 if (gfc_match_eos () == MATCH_YES)
5794 m = gfc_match_symbol (&sym, 0);
5798 if (gfc_add_protected (&sym->attr, sym->name, &gfc_current_locus)
5811 if (gfc_match_eos () == MATCH_YES)
5813 if (gfc_match_char (',') != MATCH_YES)
5820 gfc_error ("Syntax error in PROTECTED statement at %C");
5825 /* The PRIVATE statement is a bit weird in that it can be an attribute
5826 declaration, but also works as a standalone statement inside of a
5827 type declaration or a module. */
5830 gfc_match_private (gfc_statement *st)
5833 if (gfc_match ("private") != MATCH_YES)
5836 if (gfc_current_state () != COMP_MODULE
5837 && !(gfc_current_state () == COMP_DERIVED
5838 && gfc_state_stack->previous
5839 && gfc_state_stack->previous->state == COMP_MODULE)
5840 && !(gfc_current_state () == COMP_DERIVED_CONTAINS
5841 && gfc_state_stack->previous && gfc_state_stack->previous->previous
5842 && gfc_state_stack->previous->previous->state == COMP_MODULE))
5844 gfc_error ("PRIVATE statement at %C is only allowed in the "
5845 "specification part of a module");
5849 if (gfc_current_state () == COMP_DERIVED)
5851 if (gfc_match_eos () == MATCH_YES)
5857 gfc_syntax_error (ST_PRIVATE);
5861 if (gfc_match_eos () == MATCH_YES)
5868 return access_attr_decl (ST_PRIVATE);
5873 gfc_match_public (gfc_statement *st)
5876 if (gfc_match ("public") != MATCH_YES)
5879 if (gfc_current_state () != COMP_MODULE)
5881 gfc_error ("PUBLIC statement at %C is only allowed in the "
5882 "specification part of a module");
5886 if (gfc_match_eos () == MATCH_YES)
5893 return access_attr_decl (ST_PUBLIC);
5897 /* Workhorse for gfc_match_parameter. */
5906 m = gfc_match_symbol (&sym, 0);
5908 gfc_error ("Expected variable name at %C in PARAMETER statement");
5913 if (gfc_match_char ('=') == MATCH_NO)
5915 gfc_error ("Expected = sign in PARAMETER statement at %C");
5919 m = gfc_match_init_expr (&init);
5921 gfc_error ("Expected expression at %C in PARAMETER statement");
5925 if (sym->ts.type == BT_UNKNOWN
5926 && gfc_set_default_type (sym, 1, NULL) == FAILURE)
5932 if (gfc_check_assign_symbol (sym, init) == FAILURE
5933 || gfc_add_flavor (&sym->attr, FL_PARAMETER, sym->name, NULL) == FAILURE)
5941 gfc_error ("Initializing already initialized variable at %C");
5946 if (sym->ts.type == BT_CHARACTER
5947 && sym->ts.cl != NULL
5948 && sym->ts.cl->length != NULL
5949 && sym->ts.cl->length->expr_type == EXPR_CONSTANT
5950 && init->expr_type == EXPR_CONSTANT
5951 && init->ts.type == BT_CHARACTER)
5952 gfc_set_constant_character_len (
5953 mpz_get_si (sym->ts.cl->length->value.integer), init, -1);
5954 else if (sym->ts.type == BT_CHARACTER && sym->ts.cl != NULL
5955 && sym->ts.cl->length == NULL)
5958 if (init->expr_type == EXPR_CONSTANT)
5960 clen = init->value.character.length;
5961 sym->ts.cl->length = gfc_int_expr (clen);
5963 else if (init->expr_type == EXPR_ARRAY)
5965 gfc_expr *p = init->value.constructor->expr;
5966 clen = p->value.character.length;
5967 sym->ts.cl->length = gfc_int_expr (clen);
5969 else if (init->ts.cl && init->ts.cl->length)
5970 sym->ts.cl->length = gfc_copy_expr (sym->value->ts.cl->length);
5977 gfc_free_expr (init);
5982 /* Match a parameter statement, with the weird syntax that these have. */
5985 gfc_match_parameter (void)
5989 if (gfc_match_char ('(') == MATCH_NO)
5998 if (gfc_match (" )%t") == MATCH_YES)
6001 if (gfc_match_char (',') != MATCH_YES)
6003 gfc_error ("Unexpected characters in PARAMETER statement at %C");
6013 /* Save statements have a special syntax. */
6016 gfc_match_save (void)
6018 char n[GFC_MAX_SYMBOL_LEN+1];
6023 if (gfc_match_eos () == MATCH_YES)
6025 if (gfc_current_ns->seen_save)
6027 if (gfc_notify_std (GFC_STD_LEGACY, "Blanket SAVE statement at %C "
6028 "follows previous SAVE statement")
6033 gfc_current_ns->save_all = gfc_current_ns->seen_save = 1;
6037 if (gfc_current_ns->save_all)
6039 if (gfc_notify_std (GFC_STD_LEGACY, "SAVE statement at %C follows "
6040 "blanket SAVE statement")
6049 m = gfc_match_symbol (&sym, 0);
6053 if (gfc_add_save (&sym->attr, sym->name, &gfc_current_locus)
6065 m = gfc_match (" / %n /", &n);
6066 if (m == MATCH_ERROR)
6071 c = gfc_get_common (n, 0);
6074 gfc_current_ns->seen_save = 1;
6077 if (gfc_match_eos () == MATCH_YES)
6079 if (gfc_match_char (',') != MATCH_YES)
6086 gfc_error ("Syntax error in SAVE statement at %C");
6092 gfc_match_value (void)
6097 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE statement at %C")
6101 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6106 if (gfc_match_eos () == MATCH_YES)
6111 m = gfc_match_symbol (&sym, 0);
6115 if (gfc_add_value (&sym->attr, sym->name, &gfc_current_locus)
6128 if (gfc_match_eos () == MATCH_YES)
6130 if (gfc_match_char (',') != MATCH_YES)
6137 gfc_error ("Syntax error in VALUE statement at %C");
6143 gfc_match_volatile (void)
6148 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VOLATILE statement at %C")
6152 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6157 if (gfc_match_eos () == MATCH_YES)
6162 /* VOLATILE is special because it can be added to host-associated
6164 m = gfc_match_symbol (&sym, 1);
6168 if (gfc_add_volatile (&sym->attr, sym->name, &gfc_current_locus)
6181 if (gfc_match_eos () == MATCH_YES)
6183 if (gfc_match_char (',') != MATCH_YES)
6190 gfc_error ("Syntax error in VOLATILE statement at %C");
6195 /* Match a module procedure statement. Note that we have to modify
6196 symbols in the parent's namespace because the current one was there
6197 to receive symbols that are in an interface's formal argument list. */
6200 gfc_match_modproc (void)
6202 char name[GFC_MAX_SYMBOL_LEN + 1];
6205 gfc_namespace *module_ns;
6206 gfc_interface *old_interface_head, *interface;
6208 if (gfc_state_stack->state != COMP_INTERFACE
6209 || gfc_state_stack->previous == NULL
6210 || current_interface.type == INTERFACE_NAMELESS
6211 || current_interface.type == INTERFACE_ABSTRACT)
6213 gfc_error ("MODULE PROCEDURE at %C must be in a generic module "
6218 module_ns = gfc_current_ns->parent;
6219 for (; module_ns; module_ns = module_ns->parent)
6220 if (module_ns->proc_name->attr.flavor == FL_MODULE)
6223 if (module_ns == NULL)
6226 /* Store the current state of the interface. We will need it if we
6227 end up with a syntax error and need to recover. */
6228 old_interface_head = gfc_current_interface_head ();
6234 m = gfc_match_name (name);
6240 /* Check for syntax error before starting to add symbols to the
6241 current namespace. */
6242 if (gfc_match_eos () == MATCH_YES)
6244 if (!last && gfc_match_char (',') != MATCH_YES)
6247 /* Now we're sure the syntax is valid, we process this item
6249 if (gfc_get_symbol (name, module_ns, &sym))
6252 if (sym->attr.proc != PROC_MODULE
6253 && gfc_add_procedure (&sym->attr, PROC_MODULE,
6254 sym->name, NULL) == FAILURE)
6257 if (gfc_add_interface (sym) == FAILURE)
6260 sym->attr.mod_proc = 1;
6269 /* Restore the previous state of the interface. */
6270 interface = gfc_current_interface_head ();
6271 gfc_set_current_interface_head (old_interface_head);
6273 /* Free the new interfaces. */
6274 while (interface != old_interface_head)
6276 gfc_interface *i = interface->next;
6277 gfc_free (interface);
6281 /* And issue a syntax error. */
6282 gfc_syntax_error (ST_MODULE_PROC);
6287 /* Check a derived type that is being extended. */
6289 check_extended_derived_type (char *name)
6291 gfc_symbol *extended;
6293 if (gfc_find_symbol (name, gfc_current_ns, 1, &extended))
6295 gfc_error ("Ambiguous symbol in TYPE definition at %C");
6301 gfc_error ("No such symbol in TYPE definition at %C");
6305 if (extended->attr.flavor != FL_DERIVED)
6307 gfc_error ("'%s' in EXTENDS expression at %C is not a "
6308 "derived type", name);
6312 if (extended->attr.is_bind_c)
6314 gfc_error ("'%s' cannot be extended at %C because it "
6315 "is BIND(C)", extended->name);
6319 if (extended->attr.sequence)
6321 gfc_error ("'%s' cannot be extended at %C because it "
6322 "is a SEQUENCE type", extended->name);
6330 /* Match the optional attribute specifiers for a type declaration.
6331 Return MATCH_ERROR if an error is encountered in one of the handled
6332 attributes (public, private, bind(c)), MATCH_NO if what's found is
6333 not a handled attribute, and MATCH_YES otherwise. TODO: More error
6334 checking on attribute conflicts needs to be done. */
6337 gfc_get_type_attr_spec (symbol_attribute *attr, char *name)
6339 /* See if the derived type is marked as private. */
6340 if (gfc_match (" , private") == MATCH_YES)
6342 if (gfc_current_state () != COMP_MODULE)
6344 gfc_error ("Derived type at %C can only be PRIVATE in the "
6345 "specification part of a module");
6349 if (gfc_add_access (attr, ACCESS_PRIVATE, NULL, NULL) == FAILURE)
6352 else if (gfc_match (" , public") == MATCH_YES)
6354 if (gfc_current_state () != COMP_MODULE)
6356 gfc_error ("Derived type at %C can only be PUBLIC in the "
6357 "specification part of a module");
6361 if (gfc_add_access (attr, ACCESS_PUBLIC, NULL, NULL) == FAILURE)
6364 else if (gfc_match (" , bind ( c )") == MATCH_YES)
6366 /* If the type is defined to be bind(c) it then needs to make
6367 sure that all fields are interoperable. This will
6368 need to be a semantic check on the finished derived type.
6369 See 15.2.3 (lines 9-12) of F2003 draft. */
6370 if (gfc_add_is_bind_c (attr, NULL, &gfc_current_locus, 0) != SUCCESS)
6373 /* TODO: attr conflicts need to be checked, probably in symbol.c. */
6375 else if (gfc_match (" , abstract") == MATCH_YES)
6377 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ABSTRACT type at %C")
6381 if (gfc_add_abstract (attr, &gfc_current_locus) == FAILURE)
6384 else if (name && gfc_match(" , extends ( %n )", name) == MATCH_YES)
6386 if (gfc_add_extension (attr, &gfc_current_locus) == FAILURE)
6392 /* If we get here, something matched. */
6397 /* Match the beginning of a derived type declaration. If a type name
6398 was the result of a function, then it is possible to have a symbol
6399 already to be known as a derived type yet have no components. */
6402 gfc_match_derived_decl (void)
6404 char name[GFC_MAX_SYMBOL_LEN + 1];
6405 char parent[GFC_MAX_SYMBOL_LEN + 1];
6406 symbol_attribute attr;
6408 gfc_symbol *extended;
6410 match is_type_attr_spec = MATCH_NO;
6411 bool seen_attr = false;
6413 if (gfc_current_state () == COMP_DERIVED)
6418 gfc_clear_attr (&attr);
6423 is_type_attr_spec = gfc_get_type_attr_spec (&attr, parent);
6424 if (is_type_attr_spec == MATCH_ERROR)
6426 if (is_type_attr_spec == MATCH_YES)
6428 } while (is_type_attr_spec == MATCH_YES);
6430 /* Deal with derived type extensions. The extension attribute has
6431 been added to 'attr' but now the parent type must be found and
6434 extended = check_extended_derived_type (parent);
6436 if (parent[0] && !extended)
6439 if (gfc_match (" ::") != MATCH_YES && seen_attr)
6441 gfc_error ("Expected :: in TYPE definition at %C");
6445 m = gfc_match (" %n%t", name);
6449 /* Make sure the name is not the name of an intrinsic type. */
6450 if (gfc_is_intrinsic_typename (name))
6452 gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic "
6457 if (gfc_get_symbol (name, NULL, &sym))
6460 if (sym->ts.type != BT_UNKNOWN)
6462 gfc_error ("Derived type name '%s' at %C already has a basic type "
6463 "of %s", sym->name, gfc_typename (&sym->ts));
6467 /* The symbol may already have the derived attribute without the
6468 components. The ways this can happen is via a function
6469 definition, an INTRINSIC statement or a subtype in another
6470 derived type that is a pointer. The first part of the AND clause
6471 is true if the symbol is not the return value of a function. */
6472 if (sym->attr.flavor != FL_DERIVED
6473 && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE)
6476 if (sym->components != NULL || sym->attr.zero_comp)
6478 gfc_error ("Derived type definition of '%s' at %C has already been "
6479 "defined", sym->name);
6483 if (attr.access != ACCESS_UNKNOWN
6484 && gfc_add_access (&sym->attr, attr.access, sym->name, NULL) == FAILURE)
6487 /* See if the derived type was labeled as bind(c). */
6488 if (attr.is_bind_c != 0)
6489 sym->attr.is_bind_c = attr.is_bind_c;
6491 /* Construct the f2k_derived namespace if it is not yet there. */
6492 if (!sym->f2k_derived)
6493 sym->f2k_derived = gfc_get_namespace (NULL, 0);
6495 if (extended && !sym->components)
6500 /* Add the extended derived type as the first component. */
6501 gfc_add_component (sym, parent, &p);
6502 sym->attr.extension = attr.extension;
6504 gfc_set_sym_referenced (extended);
6506 p->ts.type = BT_DERIVED;
6507 p->ts.derived = extended;
6508 p->initializer = gfc_default_initializer (&p->ts);
6510 /* Provide the links between the extended type and its extension. */
6511 if (!extended->f2k_derived)
6512 extended->f2k_derived = gfc_get_namespace (NULL, 0);
6513 st = gfc_new_symtree (&extended->f2k_derived->sym_root, sym->name);
6517 /* Take over the ABSTRACT attribute. */
6518 sym->attr.abstract = attr.abstract;
6520 gfc_new_block = sym;
6526 /* Cray Pointees can be declared as:
6527 pointer (ipt, a (n,m,...,*))
6528 By default, this is treated as an AS_ASSUMED_SIZE array. We'll
6529 cheat and set a constant bound of 1 for the last dimension, if this
6530 is the case. Since there is no bounds-checking for Cray Pointees,
6531 this will be okay. */
6534 gfc_mod_pointee_as (gfc_array_spec *as)
6536 as->cray_pointee = true; /* This will be useful to know later. */
6537 if (as->type == AS_ASSUMED_SIZE)
6539 as->type = AS_EXPLICIT;
6540 as->upper[as->rank - 1] = gfc_int_expr (1);
6541 as->cp_was_assumed = true;
6543 else if (as->type == AS_ASSUMED_SHAPE)
6545 gfc_error ("Cray Pointee at %C cannot be assumed shape array");
6552 /* Match the enum definition statement, here we are trying to match
6553 the first line of enum definition statement.
6554 Returns MATCH_YES if match is found. */
6557 gfc_match_enum (void)
6561 m = gfc_match_eos ();
6565 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENUM and ENUMERATOR at %C")
6573 /* Match a variable name with an optional initializer. When this
6574 subroutine is called, a variable is expected to be parsed next.
6575 Depending on what is happening at the moment, updates either the
6576 symbol table or the current interface. */
6579 enumerator_decl (void)
6581 char name[GFC_MAX_SYMBOL_LEN + 1];
6582 gfc_expr *initializer;
6583 gfc_array_spec *as = NULL;
6591 old_locus = gfc_current_locus;
6593 /* When we get here, we've just matched a list of attributes and
6594 maybe a type and a double colon. The next thing we expect to see
6595 is the name of the symbol. */
6596 m = gfc_match_name (name);
6600 var_locus = gfc_current_locus;
6602 /* OK, we've successfully matched the declaration. Now put the
6603 symbol in the current namespace. If we fail to create the symbol,
6605 if (build_sym (name, NULL, &as, &var_locus) == FAILURE)
6611 /* The double colon must be present in order to have initializers.
6612 Otherwise the statement is ambiguous with an assignment statement. */
6615 if (gfc_match_char ('=') == MATCH_YES)
6617 m = gfc_match_init_expr (&initializer);
6620 gfc_error ("Expected an initialization expression at %C");
6629 /* If we do not have an initializer, the initialization value of the
6630 previous enumerator (stored in last_initializer) is incremented
6631 by 1 and is used to initialize the current enumerator. */
6632 if (initializer == NULL)
6633 initializer = gfc_enum_initializer (last_initializer, old_locus);
6635 if (initializer == NULL || initializer->ts.type != BT_INTEGER)
6637 gfc_error("ENUMERATOR %L not initialized with integer expression",
6640 gfc_free_enum_history ();
6644 /* Store this current initializer, for the next enumerator variable
6645 to be parsed. add_init_expr_to_sym() zeros initializer, so we
6646 use last_initializer below. */
6647 last_initializer = initializer;
6648 t = add_init_expr_to_sym (name, &initializer, &var_locus);
6650 /* Maintain enumerator history. */
6651 gfc_find_symbol (name, NULL, 0, &sym);
6652 create_enum_history (sym, last_initializer);
6654 return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR;
6657 /* Free stuff up and return. */
6658 gfc_free_expr (initializer);
6664 /* Match the enumerator definition statement. */
6667 gfc_match_enumerator_def (void)
6672 gfc_clear_ts (¤t_ts);
6674 m = gfc_match (" enumerator");
6678 m = gfc_match (" :: ");
6679 if (m == MATCH_ERROR)
6682 colon_seen = (m == MATCH_YES);
6684 if (gfc_current_state () != COMP_ENUM)
6686 gfc_error ("ENUM definition statement expected before %C");
6687 gfc_free_enum_history ();
6691 (¤t_ts)->type = BT_INTEGER;
6692 (¤t_ts)->kind = gfc_c_int_kind;
6694 gfc_clear_attr (¤t_attr);
6695 t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, NULL);
6704 m = enumerator_decl ();
6705 if (m == MATCH_ERROR)
6710 if (gfc_match_eos () == MATCH_YES)
6712 if (gfc_match_char (',') != MATCH_YES)
6716 if (gfc_current_state () == COMP_ENUM)
6718 gfc_free_enum_history ();
6719 gfc_error ("Syntax error in ENUMERATOR definition at %C");
6724 gfc_free_array_spec (current_as);
6731 /* Match binding attributes. */
6734 match_binding_attributes (gfc_typebound_proc* ba, bool generic)
6736 bool found_passing = false;
6739 /* Intialize to defaults. Do so even before the MATCH_NO check so that in
6740 this case the defaults are in there. */
6741 ba->access = ACCESS_UNKNOWN;
6742 ba->pass_arg = NULL;
6743 ba->pass_arg_num = 0;
6745 ba->non_overridable = 0;
6747 /* If we find a comma, we believe there are binding attributes. */
6748 if (gfc_match_char (',') == MATCH_NO)
6750 ba->access = gfc_typebound_default_access;
6756 /* Access specifier. */
6758 m = gfc_match (" public");
6759 if (m == MATCH_ERROR)
6763 if (ba->access != ACCESS_UNKNOWN)
6765 gfc_error ("Duplicate access-specifier at %C");
6769 ba->access = ACCESS_PUBLIC;
6773 m = gfc_match (" private");
6774 if (m == MATCH_ERROR)
6778 if (ba->access != ACCESS_UNKNOWN)
6780 gfc_error ("Duplicate access-specifier at %C");
6784 ba->access = ACCESS_PRIVATE;
6788 /* If inside GENERIC, the following is not allowed. */
6793 m = gfc_match (" nopass");
6794 if (m == MATCH_ERROR)
6800 gfc_error ("Binding attributes already specify passing,"
6801 " illegal NOPASS at %C");
6805 found_passing = true;
6810 /* NON_OVERRIDABLE flag. */
6811 m = gfc_match (" non_overridable");
6812 if (m == MATCH_ERROR)
6816 if (ba->non_overridable)
6818 gfc_error ("Duplicate NON_OVERRIDABLE at %C");
6822 ba->non_overridable = 1;
6826 /* DEFERRED flag. */
6827 /* TODO: Handle really once implemented. */
6828 m = gfc_match (" deferred");
6829 if (m == MATCH_ERROR)
6833 gfc_error ("DEFERRED not yet implemented at %C");
6837 /* PASS possibly including argument. */
6838 m = gfc_match (" pass");
6839 if (m == MATCH_ERROR)
6843 char arg[GFC_MAX_SYMBOL_LEN + 1];
6847 gfc_error ("Binding attributes already specify passing,"
6848 " illegal PASS at %C");
6852 m = gfc_match (" ( %n )", arg);
6853 if (m == MATCH_ERROR)
6856 ba->pass_arg = xstrdup (arg);
6857 gcc_assert ((m == MATCH_YES) == (ba->pass_arg != NULL));
6859 found_passing = true;
6866 /* Nothing matching found. */
6868 gfc_error ("Expected access-specifier at %C");
6870 gfc_error ("Expected binding attribute at %C");
6873 while (gfc_match_char (',') == MATCH_YES);
6875 if (ba->access == ACCESS_UNKNOWN)
6876 ba->access = gfc_typebound_default_access;
6881 gfc_free (ba->pass_arg);
6886 /* Match a PROCEDURE specific binding inside a derived type. */
6889 match_procedure_in_type (void)
6891 char name[GFC_MAX_SYMBOL_LEN + 1];
6892 char target_buf[GFC_MAX_SYMBOL_LEN + 1];
6894 gfc_typebound_proc* tb;
6902 /* Check current state. */
6903 gcc_assert (gfc_state_stack->state == COMP_DERIVED_CONTAINS);
6904 block = gfc_state_stack->previous->sym;
6907 /* TODO: Really implement PROCEDURE(interface). */
6908 if (gfc_match (" (") == MATCH_YES)
6910 gfc_error ("PROCEDURE(interface) at %C is not yet implemented");
6914 /* Construct the data structure. */
6915 tb = gfc_get_typebound_proc ();
6916 tb->where = gfc_current_locus;
6919 /* Match binding attributes. */
6920 m = match_binding_attributes (tb, false);
6921 if (m == MATCH_ERROR)
6923 seen_attrs = (m == MATCH_YES);
6925 /* Match the colons. */
6926 m = gfc_match (" ::");
6927 if (m == MATCH_ERROR)
6929 seen_colons = (m == MATCH_YES);
6930 if (seen_attrs && !seen_colons)
6932 gfc_error ("Expected '::' after binding-attributes at %C");
6936 /* Match the binding name. */
6937 m = gfc_match_name (name);
6938 if (m == MATCH_ERROR)
6942 gfc_error ("Expected binding name at %C");
6946 /* Try to match the '=> target', if it's there. */
6948 m = gfc_match (" =>");
6949 if (m == MATCH_ERROR)
6955 gfc_error ("'::' needed in PROCEDURE binding with explicit target"
6960 m = gfc_match_name (target_buf);
6961 if (m == MATCH_ERROR)
6965 gfc_error ("Expected binding target after '=>' at %C");
6968 target = target_buf;
6971 /* Now we should have the end. */
6972 m = gfc_match_eos ();
6973 if (m == MATCH_ERROR)
6977 gfc_error ("Junk after PROCEDURE declaration at %C");
6981 /* If no target was found, it has the same name as the binding. */
6985 /* Get the namespace to insert the symbols into. */
6986 ns = block->f2k_derived;
6989 /* See if we already have a binding with this name in the symtree which would
6990 be an error. If a GENERIC already targetted this binding, it may be
6991 already there but then typebound is still NULL. */
6992 stree = gfc_find_symtree (ns->sym_root, name);
6993 if (stree && stree->typebound)
6995 gfc_error ("There's already a procedure with binding name '%s' for the"
6996 " derived type '%s' at %C", name, block->name);
7000 /* Insert it and set attributes. */
7001 if (gfc_get_sym_tree (name, ns, &stree))
7003 if (gfc_get_sym_tree (target, gfc_current_ns, &tb->u.specific))
7005 gfc_set_sym_referenced (tb->u.specific->n.sym);
7006 stree->typebound = tb;
7012 /* Match a GENERIC procedure binding inside a derived type. */
7015 gfc_match_generic (void)
7017 char name[GFC_MAX_SYMBOL_LEN + 1];
7019 gfc_typebound_proc tbattr; /* Used for match_binding_attributes. */
7020 gfc_typebound_proc* tb;
7025 /* Check current state. */
7026 if (gfc_current_state () == COMP_DERIVED)
7028 gfc_error ("GENERIC at %C must be inside a derived-type CONTAINS");
7031 if (gfc_current_state () != COMP_DERIVED_CONTAINS)
7033 block = gfc_state_stack->previous->sym;
7034 ns = block->f2k_derived;
7035 gcc_assert (block && ns);
7037 /* See if we get an access-specifier. */
7038 m = match_binding_attributes (&tbattr, true);
7039 if (m == MATCH_ERROR)
7042 /* Now the colons, those are required. */
7043 if (gfc_match (" ::") != MATCH_YES)
7045 gfc_error ("Expected '::' at %C");
7049 /* The binding name and =>. */
7050 m = gfc_match (" %n =>", name);
7051 if (m == MATCH_ERROR)
7055 gfc_error ("Expected generic name at %C");
7059 /* If there's already something with this name, check that it is another
7060 GENERIC and then extend that rather than build a new node. */
7061 st = gfc_find_symtree (ns->sym_root, name);
7064 if (!st->typebound || !st->typebound->is_generic)
7066 gfc_error ("There's already a non-generic procedure with binding name"
7067 " '%s' for the derived type '%s' at %C",
7073 if (tb->access != tbattr.access)
7075 gfc_error ("Binding at %C must have the same access as already"
7076 " defined binding '%s'", name);
7082 if (gfc_get_sym_tree (name, ns, &st))
7085 st->typebound = tb = gfc_get_typebound_proc ();
7086 tb->where = gfc_current_locus;
7087 tb->access = tbattr.access;
7089 tb->u.generic = NULL;
7092 /* Now, match all following names as specific targets. */
7095 gfc_symtree* target_st;
7096 gfc_tbp_generic* target;
7098 m = gfc_match_name (name);
7099 if (m == MATCH_ERROR)
7103 gfc_error ("Expected specific binding name at %C");
7107 if (gfc_get_sym_tree (name, ns, &target_st))
7110 /* See if this is a duplicate specification. */
7111 for (target = tb->u.generic; target; target = target->next)
7112 if (target_st == target->specific_st)
7114 gfc_error ("'%s' already defined as specific binding for the"
7115 " generic '%s' at %C", name, st->n.sym->name);
7119 gfc_set_sym_referenced (target_st->n.sym);
7121 target = gfc_get_tbp_generic ();
7122 target->specific_st = target_st;
7123 target->specific = NULL;
7124 target->next = tb->u.generic;
7125 tb->u.generic = target;
7127 while (gfc_match (" ,") == MATCH_YES);
7129 /* Here should be the end. */
7130 if (gfc_match_eos () != MATCH_YES)
7132 gfc_error ("Junk after GENERIC binding at %C");
7143 /* Match a FINAL declaration inside a derived type. */
7146 gfc_match_final_decl (void)
7148 char name[GFC_MAX_SYMBOL_LEN + 1];
7151 gfc_namespace* module_ns;
7155 if (gfc_state_stack->state != COMP_DERIVED_CONTAINS)
7157 gfc_error ("FINAL declaration at %C must be inside a derived type "
7158 "CONTAINS section");
7162 block = gfc_state_stack->previous->sym;
7165 if (!gfc_state_stack->previous || !gfc_state_stack->previous->previous
7166 || gfc_state_stack->previous->previous->state != COMP_MODULE)
7168 gfc_error ("Derived type declaration with FINAL at %C must be in the"
7169 " specification part of a MODULE");
7173 module_ns = gfc_current_ns;
7174 gcc_assert (module_ns);
7175 gcc_assert (module_ns->proc_name->attr.flavor == FL_MODULE);
7177 /* Match optional ::, don't care about MATCH_YES or MATCH_NO. */
7178 if (gfc_match (" ::") == MATCH_ERROR)
7181 /* Match the sequence of procedure names. */
7188 if (first && gfc_match_eos () == MATCH_YES)
7190 gfc_error ("Empty FINAL at %C");
7194 m = gfc_match_name (name);
7197 gfc_error ("Expected module procedure name at %C");
7200 else if (m != MATCH_YES)
7203 if (gfc_match_eos () == MATCH_YES)
7205 if (!last && gfc_match_char (',') != MATCH_YES)
7207 gfc_error ("Expected ',' at %C");
7211 if (gfc_get_symbol (name, module_ns, &sym))
7213 gfc_error ("Unknown procedure name \"%s\" at %C", name);
7217 /* Mark the symbol as module procedure. */
7218 if (sym->attr.proc != PROC_MODULE
7219 && gfc_add_procedure (&sym->attr, PROC_MODULE,
7220 sym->name, NULL) == FAILURE)
7223 /* Check if we already have this symbol in the list, this is an error. */
7224 for (f = block->f2k_derived->finalizers; f; f = f->next)
7225 if (f->proc_sym == sym)
7227 gfc_error ("'%s' at %C is already defined as FINAL procedure!",
7232 /* Add this symbol to the list of finalizers. */
7233 gcc_assert (block->f2k_derived);
7235 f = XCNEW (gfc_finalizer);
7237 f->proc_tree = NULL;
7238 f->where = gfc_current_locus;
7239 f->next = block->f2k_derived->finalizers;
7240 block->f2k_derived->finalizers = f;