1 /* Declaration statement matcher
2 Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008, 2009
3 Free Software Foundation, Inc.
4 Contributed by Andy Vaught
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
30 /* Macros to access allocate memory for gfc_data_variable,
31 gfc_data_value and gfc_data. */
32 #define gfc_get_data_variable() XCNEW (gfc_data_variable)
33 #define gfc_get_data_value() XCNEW (gfc_data_value)
34 #define gfc_get_data() XCNEW (gfc_data)
37 /* This flag is set if an old-style length selector is matched
38 during a type-declaration statement. */
40 static int old_char_selector;
42 /* When variables acquire types and attributes from a declaration
43 statement, they get them from the following static variables. The
44 first part of a declaration sets these variables and the second
45 part copies these into symbol structures. */
47 static gfc_typespec current_ts;
49 static symbol_attribute current_attr;
50 static gfc_array_spec *current_as;
51 static int colon_seen;
53 /* The current binding label (if any). */
54 static char curr_binding_label[GFC_MAX_BINDING_LABEL_LEN + 1];
55 /* Need to know how many identifiers are on the current data declaration
56 line in case we're given the BIND(C) attribute with a NAME= specifier. */
57 static int num_idents_on_line;
58 /* Need to know if a NAME= specifier was found during gfc_match_bind_c so we
59 can supply a name if the curr_binding_label is nil and NAME= was not. */
60 static int has_name_equals = 0;
62 /* Initializer of the previous enumerator. */
64 static gfc_expr *last_initializer;
66 /* History of all the enumerators is maintained, so that
67 kind values of all the enumerators could be updated depending
68 upon the maximum initialized value. */
70 typedef struct enumerator_history
73 gfc_expr *initializer;
74 struct enumerator_history *next;
78 /* Header of enum history chain. */
80 static enumerator_history *enum_history = NULL;
82 /* Pointer of enum history node containing largest initializer. */
84 static enumerator_history *max_enum = NULL;
86 /* gfc_new_block points to the symbol of a newly matched block. */
88 gfc_symbol *gfc_new_block;
90 bool gfc_matching_function;
93 /********************* DATA statement subroutines *********************/
95 static bool in_match_data = false;
98 gfc_in_match_data (void)
100 return in_match_data;
104 set_in_match_data (bool set_value)
106 in_match_data = set_value;
109 /* Free a gfc_data_variable structure and everything beneath it. */
112 free_variable (gfc_data_variable *p)
114 gfc_data_variable *q;
119 gfc_free_expr (p->expr);
120 gfc_free_iterator (&p->iter, 0);
121 free_variable (p->list);
127 /* Free a gfc_data_value structure and everything beneath it. */
130 free_value (gfc_data_value *p)
137 gfc_free_expr (p->expr);
143 /* Free a list of gfc_data structures. */
146 gfc_free_data (gfc_data *p)
153 free_variable (p->var);
154 free_value (p->value);
160 /* Free all data in a namespace. */
163 gfc_free_data_all (gfc_namespace *ns)
176 static match var_element (gfc_data_variable *);
178 /* Match a list of variables terminated by an iterator and a right
182 var_list (gfc_data_variable *parent)
184 gfc_data_variable *tail, var;
187 m = var_element (&var);
188 if (m == MATCH_ERROR)
193 tail = gfc_get_data_variable ();
200 if (gfc_match_char (',') != MATCH_YES)
203 m = gfc_match_iterator (&parent->iter, 1);
206 if (m == MATCH_ERROR)
209 m = var_element (&var);
210 if (m == MATCH_ERROR)
215 tail->next = gfc_get_data_variable ();
221 if (gfc_match_char (')') != MATCH_YES)
226 gfc_syntax_error (ST_DATA);
231 /* Match a single element in a data variable list, which can be a
232 variable-iterator list. */
235 var_element (gfc_data_variable *new_var)
240 memset (new_var, 0, sizeof (gfc_data_variable));
242 if (gfc_match_char ('(') == MATCH_YES)
243 return var_list (new_var);
245 m = gfc_match_variable (&new_var->expr, 0);
249 sym = new_var->expr->symtree->n.sym;
251 /* Symbol should already have an associated type. */
252 if (gfc_check_symbol_typed (sym, gfc_current_ns,
253 false, gfc_current_locus) == FAILURE)
256 if (!sym->attr.function && gfc_current_ns->parent
257 && gfc_current_ns->parent == sym->ns)
259 gfc_error ("Host associated variable '%s' may not be in the DATA "
260 "statement at %C", sym->name);
264 if (gfc_current_state () != COMP_BLOCK_DATA
265 && sym->attr.in_common
266 && gfc_notify_std (GFC_STD_GNU, "Extension: initialization of "
267 "common block variable '%s' in DATA statement at %C",
268 sym->name) == FAILURE)
271 if (gfc_add_data (&sym->attr, sym->name, &new_var->expr->where) == FAILURE)
278 /* Match the top-level list of data variables. */
281 top_var_list (gfc_data *d)
283 gfc_data_variable var, *tail, *new_var;
290 m = var_element (&var);
293 if (m == MATCH_ERROR)
296 new_var = gfc_get_data_variable ();
302 tail->next = new_var;
306 if (gfc_match_char ('/') == MATCH_YES)
308 if (gfc_match_char (',') != MATCH_YES)
315 gfc_syntax_error (ST_DATA);
316 gfc_free_data_all (gfc_current_ns);
322 match_data_constant (gfc_expr **result)
324 char name[GFC_MAX_SYMBOL_LEN + 1];
330 m = gfc_match_literal_constant (&expr, 1);
337 if (m == MATCH_ERROR)
340 m = gfc_match_null (result);
344 old_loc = gfc_current_locus;
346 /* Should this be a structure component, try to match it
347 before matching a name. */
348 m = gfc_match_rvalue (result);
349 if (m == MATCH_ERROR)
352 if (m == MATCH_YES && (*result)->expr_type == EXPR_STRUCTURE)
354 if (gfc_simplify_expr (*result, 0) == FAILURE)
359 gfc_current_locus = old_loc;
361 m = gfc_match_name (name);
365 if (gfc_find_symbol (name, NULL, 1, &sym))
369 || (sym->attr.flavor != FL_PARAMETER && sym->attr.flavor != FL_DERIVED))
371 gfc_error ("Symbol '%s' must be a PARAMETER in DATA statement at %C",
375 else if (sym->attr.flavor == FL_DERIVED)
376 return gfc_match_structure_constructor (sym, result, false);
378 /* Check to see if the value is an initialization array expression. */
379 if (sym->value->expr_type == EXPR_ARRAY)
381 gfc_current_locus = old_loc;
383 m = gfc_match_init_expr (result);
384 if (m == MATCH_ERROR)
389 if (gfc_simplify_expr (*result, 0) == FAILURE)
392 if ((*result)->expr_type == EXPR_CONSTANT)
396 gfc_error ("Invalid initializer %s in Data statement at %C", name);
402 *result = gfc_copy_expr (sym->value);
407 /* Match a list of values in a DATA statement. The leading '/' has
408 already been seen at this point. */
411 top_val_list (gfc_data *data)
413 gfc_data_value *new_val, *tail;
421 m = match_data_constant (&expr);
424 if (m == MATCH_ERROR)
427 new_val = gfc_get_data_value ();
428 mpz_init (new_val->repeat);
431 data->value = new_val;
433 tail->next = new_val;
437 if (expr->ts.type != BT_INTEGER || gfc_match_char ('*') != MATCH_YES)
440 mpz_set_ui (tail->repeat, 1);
444 if (expr->ts.type == BT_INTEGER)
445 mpz_set (tail->repeat, expr->value.integer);
446 gfc_free_expr (expr);
448 m = match_data_constant (&tail->expr);
451 if (m == MATCH_ERROR)
455 if (gfc_match_char ('/') == MATCH_YES)
457 if (gfc_match_char (',') == MATCH_NO)
464 gfc_syntax_error (ST_DATA);
465 gfc_free_data_all (gfc_current_ns);
470 /* Matches an old style initialization. */
473 match_old_style_init (const char *name)
480 /* Set up data structure to hold initializers. */
481 gfc_find_sym_tree (name, NULL, 0, &st);
484 newdata = gfc_get_data ();
485 newdata->var = gfc_get_data_variable ();
486 newdata->var->expr = gfc_get_variable_expr (st);
487 newdata->where = gfc_current_locus;
489 /* Match initial value list. This also eats the terminal '/'. */
490 m = top_val_list (newdata);
499 gfc_error ("Initialization at %C is not allowed in a PURE procedure");
504 /* Mark the variable as having appeared in a data statement. */
505 if (gfc_add_data (&sym->attr, sym->name, &sym->declared_at) == FAILURE)
511 /* Chain in namespace list of DATA initializers. */
512 newdata->next = gfc_current_ns->data;
513 gfc_current_ns->data = newdata;
519 /* Match the stuff following a DATA statement. If ERROR_FLAG is set,
520 we are matching a DATA statement and are therefore issuing an error
521 if we encounter something unexpected, if not, we're trying to match
522 an old-style initialization expression of the form INTEGER I /2/. */
525 gfc_match_data (void)
530 set_in_match_data (true);
534 new_data = gfc_get_data ();
535 new_data->where = gfc_current_locus;
537 m = top_var_list (new_data);
541 m = top_val_list (new_data);
545 new_data->next = gfc_current_ns->data;
546 gfc_current_ns->data = new_data;
548 if (gfc_match_eos () == MATCH_YES)
551 gfc_match_char (','); /* Optional comma */
554 set_in_match_data (false);
558 gfc_error ("DATA statement at %C is not allowed in a PURE procedure");
565 set_in_match_data (false);
566 gfc_free_data (new_data);
571 /************************ Declaration statements *********************/
573 /* Match an intent specification. Since this can only happen after an
574 INTENT word, a legal intent-spec must follow. */
577 match_intent_spec (void)
580 if (gfc_match (" ( in out )") == MATCH_YES)
582 if (gfc_match (" ( in )") == MATCH_YES)
584 if (gfc_match (" ( out )") == MATCH_YES)
587 gfc_error ("Bad INTENT specification at %C");
588 return INTENT_UNKNOWN;
592 /* Matches a character length specification, which is either a
593 specification expression or a '*'. */
596 char_len_param_value (gfc_expr **expr)
600 if (gfc_match_char ('*') == MATCH_YES)
606 m = gfc_match_expr (expr);
609 && gfc_expr_check_typed (*expr, gfc_current_ns, false) == FAILURE)
612 if (m == MATCH_YES && (*expr)->expr_type == EXPR_FUNCTION)
614 if ((*expr)->value.function.actual
615 && (*expr)->value.function.actual->expr->symtree)
618 e = (*expr)->value.function.actual->expr;
619 if (e->symtree->n.sym->attr.flavor == FL_PROCEDURE
620 && e->expr_type == EXPR_VARIABLE)
622 if (e->symtree->n.sym->ts.type == BT_UNKNOWN)
624 if (e->symtree->n.sym->ts.type == BT_CHARACTER
625 && e->symtree->n.sym->ts.cl
626 && e->symtree->n.sym->ts.cl->length->ts.type == BT_UNKNOWN)
634 gfc_error ("Conflict in attributes of function argument at %C");
639 /* A character length is a '*' followed by a literal integer or a
640 char_len_param_value in parenthesis. */
643 match_char_length (gfc_expr **expr)
648 m = gfc_match_char ('*');
652 m = gfc_match_small_literal_int (&length, NULL);
653 if (m == MATCH_ERROR)
658 *expr = gfc_int_expr (length);
662 if (gfc_match_char ('(') == MATCH_NO)
665 m = char_len_param_value (expr);
666 if (m != MATCH_YES && gfc_matching_function)
672 if (m == MATCH_ERROR)
677 if (gfc_match_char (')') == MATCH_NO)
679 gfc_free_expr (*expr);
687 gfc_error ("Syntax error in character length specification at %C");
692 /* Special subroutine for finding a symbol. Check if the name is found
693 in the current name space. If not, and we're compiling a function or
694 subroutine and the parent compilation unit is an interface, then check
695 to see if the name we've been given is the name of the interface
696 (located in another namespace). */
699 find_special (const char *name, gfc_symbol **result)
704 i = gfc_get_symbol (name, NULL, result);
708 if (gfc_current_state () != COMP_SUBROUTINE
709 && gfc_current_state () != COMP_FUNCTION)
712 s = gfc_state_stack->previous;
716 if (s->state != COMP_INTERFACE)
719 goto end; /* Nameless interface. */
721 if (strcmp (name, s->sym->name) == 0)
732 /* Special subroutine for getting a symbol node associated with a
733 procedure name, used in SUBROUTINE and FUNCTION statements. The
734 symbol is created in the parent using with symtree node in the
735 child unit pointing to the symbol. If the current namespace has no
736 parent, then the symbol is just created in the current unit. */
739 get_proc_name (const char *name, gfc_symbol **result, bool module_fcn_entry)
745 /* Module functions have to be left in their own namespace because
746 they have potentially (almost certainly!) already been referenced.
747 In this sense, they are rather like external functions. This is
748 fixed up in resolve.c(resolve_entries), where the symbol name-
749 space is set to point to the master function, so that the fake
750 result mechanism can work. */
751 if (module_fcn_entry)
753 /* Present if entry is declared to be a module procedure. */
754 rc = gfc_find_symbol (name, gfc_current_ns->parent, 0, result);
757 rc = gfc_get_symbol (name, NULL, result);
758 else if (!gfc_get_symbol (name, NULL, &sym) && sym
759 && (*result)->ts.type == BT_UNKNOWN
760 && sym->attr.flavor == FL_UNKNOWN)
761 /* Pick up the typespec for the entry, if declared in the function
762 body. Note that this symbol is FL_UNKNOWN because it will
763 only have appeared in a type declaration. The local symtree
764 is set to point to the module symbol and a unique symtree
765 to the local version. This latter ensures a correct clearing
768 /* If the ENTRY proceeds its specification, we need to ensure
769 that this does not raise a "has no IMPLICIT type" error. */
770 if (sym->ts.type == BT_UNKNOWN)
771 sym->attr.untyped = 1;
773 (*result)->ts = sym->ts;
775 /* Put the symbol in the procedure namespace so that, should
776 the ENTRY precede its specification, the specification
778 (*result)->ns = gfc_current_ns;
780 gfc_find_sym_tree (name, gfc_current_ns, 0, &st);
782 st = gfc_get_unique_symtree (gfc_current_ns);
787 rc = gfc_get_symbol (name, gfc_current_ns->parent, result);
793 gfc_current_ns->refs++;
795 if (sym && !sym->gfc_new && gfc_current_state () != COMP_INTERFACE)
797 /* Trap another encompassed procedure with the same name. All
798 these conditions are necessary to avoid picking up an entry
799 whose name clashes with that of the encompassing procedure;
800 this is handled using gsymbols to register unique,globally
802 if (sym->attr.flavor != 0
803 && sym->attr.proc != 0
804 && (sym->attr.subroutine || sym->attr.function)
805 && sym->attr.if_source != IFSRC_UNKNOWN)
806 gfc_error_now ("Procedure '%s' at %C is already defined at %L",
807 name, &sym->declared_at);
809 /* Trap a procedure with a name the same as interface in the
810 encompassing scope. */
811 if (sym->attr.generic != 0
812 && (sym->attr.subroutine || sym->attr.function)
813 && !sym->attr.mod_proc)
814 gfc_error_now ("Name '%s' at %C is already defined"
815 " as a generic interface at %L",
816 name, &sym->declared_at);
818 /* Trap declarations of attributes in encompassing scope. The
819 signature for this is that ts.kind is set. Legitimate
820 references only set ts.type. */
821 if (sym->ts.kind != 0
822 && !sym->attr.implicit_type
823 && sym->attr.proc == 0
824 && gfc_current_ns->parent != NULL
825 && sym->attr.access == 0
826 && !module_fcn_entry)
827 gfc_error_now ("Procedure '%s' at %C has an explicit interface "
828 "and must not have attributes declared at %L",
829 name, &sym->declared_at);
832 if (gfc_current_ns->parent == NULL || *result == NULL)
835 /* Module function entries will already have a symtree in
836 the current namespace but will need one at module level. */
837 if (module_fcn_entry)
839 /* Present if entry is declared to be a module procedure. */
840 rc = gfc_find_sym_tree (name, gfc_current_ns->parent, 0, &st);
842 st = gfc_new_symtree (&gfc_current_ns->parent->sym_root, name);
845 st = gfc_new_symtree (&gfc_current_ns->sym_root, name);
850 /* See if the procedure should be a module procedure. */
852 if (((sym->ns->proc_name != NULL
853 && sym->ns->proc_name->attr.flavor == FL_MODULE
854 && sym->attr.proc != PROC_MODULE)
855 || (module_fcn_entry && sym->attr.proc != PROC_MODULE))
856 && gfc_add_procedure (&sym->attr, PROC_MODULE,
857 sym->name, NULL) == FAILURE)
864 /* Verify that the given symbol representing a parameter is C
865 interoperable, by checking to see if it was marked as such after
866 its declaration. If the given symbol is not interoperable, a
867 warning is reported, thus removing the need to return the status to
868 the calling function. The standard does not require the user use
869 one of the iso_c_binding named constants to declare an
870 interoperable parameter, but we can't be sure if the param is C
871 interop or not if the user doesn't. For example, integer(4) may be
872 legal Fortran, but doesn't have meaning in C. It may interop with
873 a number of the C types, which causes a problem because the
874 compiler can't know which one. This code is almost certainly not
875 portable, and the user will get what they deserve if the C type
876 across platforms isn't always interoperable with integer(4). If
877 the user had used something like integer(c_int) or integer(c_long),
878 the compiler could have automatically handled the varying sizes
882 verify_c_interop_param (gfc_symbol *sym)
884 int is_c_interop = 0;
885 gfc_try retval = SUCCESS;
887 /* We check implicitly typed variables in symbol.c:gfc_set_default_type().
888 Don't repeat the checks here. */
889 if (sym->attr.implicit_type)
892 /* For subroutines or functions that are passed to a BIND(C) procedure,
893 they're interoperable if they're BIND(C) and their params are all
895 if (sym->attr.flavor == FL_PROCEDURE)
897 if (sym->attr.is_bind_c == 0)
899 gfc_error_now ("Procedure '%s' at %L must have the BIND(C) "
900 "attribute to be C interoperable", sym->name,
901 &(sym->declared_at));
907 if (sym->attr.is_c_interop == 1)
908 /* We've already checked this procedure; don't check it again. */
911 return verify_bind_c_sym (sym, &(sym->ts), sym->attr.in_common,
916 /* See if we've stored a reference to a procedure that owns sym. */
917 if (sym->ns != NULL && sym->ns->proc_name != NULL)
919 if (sym->ns->proc_name->attr.is_bind_c == 1)
922 (verify_c_interop (&(sym->ts))
925 if (is_c_interop != 1)
927 /* Make personalized messages to give better feedback. */
928 if (sym->ts.type == BT_DERIVED)
929 gfc_error ("Type '%s' at %L is a parameter to the BIND(C) "
930 " procedure '%s' but is not C interoperable "
931 "because derived type '%s' is not C interoperable",
932 sym->name, &(sym->declared_at),
933 sym->ns->proc_name->name,
934 sym->ts.derived->name);
936 gfc_warning ("Variable '%s' at %L is a parameter to the "
937 "BIND(C) procedure '%s' but may not be C "
939 sym->name, &(sym->declared_at),
940 sym->ns->proc_name->name);
943 /* Character strings are only C interoperable if they have a
945 if (sym->ts.type == BT_CHARACTER)
947 gfc_charlen *cl = sym->ts.cl;
948 if (!cl || !cl->length || cl->length->expr_type != EXPR_CONSTANT
949 || mpz_cmp_si (cl->length->value.integer, 1) != 0)
951 gfc_error ("Character argument '%s' at %L "
952 "must be length 1 because "
953 "procedure '%s' is BIND(C)",
954 sym->name, &sym->declared_at,
955 sym->ns->proc_name->name);
960 /* We have to make sure that any param to a bind(c) routine does
961 not have the allocatable, pointer, or optional attributes,
962 according to J3/04-007, section 5.1. */
963 if (sym->attr.allocatable == 1)
965 gfc_error ("Variable '%s' at %L cannot have the "
966 "ALLOCATABLE attribute because procedure '%s'"
967 " is BIND(C)", sym->name, &(sym->declared_at),
968 sym->ns->proc_name->name);
972 if (sym->attr.pointer == 1)
974 gfc_error ("Variable '%s' at %L cannot have the "
975 "POINTER attribute because procedure '%s'"
976 " is BIND(C)", sym->name, &(sym->declared_at),
977 sym->ns->proc_name->name);
981 if (sym->attr.optional == 1)
983 gfc_error ("Variable '%s' at %L cannot have the "
984 "OPTIONAL attribute because procedure '%s'"
985 " is BIND(C)", sym->name, &(sym->declared_at),
986 sym->ns->proc_name->name);
990 /* Make sure that if it has the dimension attribute, that it is
991 either assumed size or explicit shape. */
994 if (sym->as->type == AS_ASSUMED_SHAPE)
996 gfc_error ("Assumed-shape array '%s' at %L cannot be an "
997 "argument to the procedure '%s' at %L because "
998 "the procedure is BIND(C)", sym->name,
999 &(sym->declared_at), sym->ns->proc_name->name,
1000 &(sym->ns->proc_name->declared_at));
1004 if (sym->as->type == AS_DEFERRED)
1006 gfc_error ("Deferred-shape array '%s' at %L cannot be an "
1007 "argument to the procedure '%s' at %L because "
1008 "the procedure is BIND(C)", sym->name,
1009 &(sym->declared_at), sym->ns->proc_name->name,
1010 &(sym->ns->proc_name->declared_at));
1021 /* Function called by variable_decl() that adds a name to the symbol table. */
1024 build_sym (const char *name, gfc_charlen *cl,
1025 gfc_array_spec **as, locus *var_locus)
1027 symbol_attribute attr;
1030 if (gfc_get_symbol (name, NULL, &sym))
1033 /* Start updating the symbol table. Add basic type attribute if present. */
1034 if (current_ts.type != BT_UNKNOWN
1035 && (sym->attr.implicit_type == 0
1036 || !gfc_compare_types (&sym->ts, ¤t_ts))
1037 && gfc_add_type (sym, ¤t_ts, var_locus) == FAILURE)
1040 if (sym->ts.type == BT_CHARACTER)
1043 /* Add dimension attribute if present. */
1044 if (gfc_set_array_spec (sym, *as, var_locus) == FAILURE)
1048 /* Add attribute to symbol. The copy is so that we can reset the
1049 dimension attribute. */
1050 attr = current_attr;
1053 if (gfc_copy_attr (&sym->attr, &attr, var_locus) == FAILURE)
1056 /* Finish any work that may need to be done for the binding label,
1057 if it's a bind(c). The bind(c) attr is found before the symbol
1058 is made, and before the symbol name (for data decls), so the
1059 current_ts is holding the binding label, or nothing if the
1060 name= attr wasn't given. Therefore, test here if we're dealing
1061 with a bind(c) and make sure the binding label is set correctly. */
1062 if (sym->attr.is_bind_c == 1)
1064 if (sym->binding_label[0] == '\0')
1066 /* Set the binding label and verify that if a NAME= was specified
1067 then only one identifier was in the entity-decl-list. */
1068 if (set_binding_label (sym->binding_label, sym->name,
1069 num_idents_on_line) == FAILURE)
1074 /* See if we know we're in a common block, and if it's a bind(c)
1075 common then we need to make sure we're an interoperable type. */
1076 if (sym->attr.in_common == 1)
1078 /* Test the common block object. */
1079 if (sym->common_block != NULL && sym->common_block->is_bind_c == 1
1080 && sym->ts.is_c_interop != 1)
1082 gfc_error_now ("Variable '%s' in common block '%s' at %C "
1083 "must be declared with a C interoperable "
1084 "kind since common block '%s' is BIND(C)",
1085 sym->name, sym->common_block->name,
1086 sym->common_block->name);
1091 sym->attr.implied_index = 0;
1097 /* Set character constant to the given length. The constant will be padded or
1098 truncated. If we're inside an array constructor without a typespec, we
1099 additionally check that all elements have the same length; check_len -1
1100 means no checking. */
1103 gfc_set_constant_character_len (int len, gfc_expr *expr, int check_len)
1108 gcc_assert (expr->expr_type == EXPR_CONSTANT);
1109 gcc_assert (expr->ts.type == BT_CHARACTER);
1111 slen = expr->value.character.length;
1114 s = gfc_get_wide_string (len + 1);
1115 memcpy (s, expr->value.character.string,
1116 MIN (len, slen) * sizeof (gfc_char_t));
1118 gfc_wide_memset (&s[slen], ' ', len - slen);
1120 if (gfc_option.warn_character_truncation && slen > len)
1121 gfc_warning_now ("CHARACTER expression at %L is being truncated "
1122 "(%d/%d)", &expr->where, slen, len);
1124 /* Apply the standard by 'hand' otherwise it gets cleared for
1126 if (check_len != -1 && slen != check_len
1127 && !(gfc_option.allow_std & GFC_STD_GNU))
1128 gfc_error_now ("The CHARACTER elements of the array constructor "
1129 "at %L must have the same length (%d/%d)",
1130 &expr->where, slen, check_len);
1133 gfc_free (expr->value.character.string);
1134 expr->value.character.string = s;
1135 expr->value.character.length = len;
1140 /* Function to create and update the enumerator history
1141 using the information passed as arguments.
1142 Pointer "max_enum" is also updated, to point to
1143 enum history node containing largest initializer.
1145 SYM points to the symbol node of enumerator.
1146 INIT points to its enumerator value. */
1149 create_enum_history (gfc_symbol *sym, gfc_expr *init)
1151 enumerator_history *new_enum_history;
1152 gcc_assert (sym != NULL && init != NULL);
1154 new_enum_history = XCNEW (enumerator_history);
1156 new_enum_history->sym = sym;
1157 new_enum_history->initializer = init;
1158 new_enum_history->next = NULL;
1160 if (enum_history == NULL)
1162 enum_history = new_enum_history;
1163 max_enum = enum_history;
1167 new_enum_history->next = enum_history;
1168 enum_history = new_enum_history;
1170 if (mpz_cmp (max_enum->initializer->value.integer,
1171 new_enum_history->initializer->value.integer) < 0)
1172 max_enum = new_enum_history;
1177 /* Function to free enum kind history. */
1180 gfc_free_enum_history (void)
1182 enumerator_history *current = enum_history;
1183 enumerator_history *next;
1185 while (current != NULL)
1187 next = current->next;
1192 enum_history = NULL;
1196 /* Function called by variable_decl() that adds an initialization
1197 expression to a symbol. */
1200 add_init_expr_to_sym (const char *name, gfc_expr **initp, locus *var_locus)
1202 symbol_attribute attr;
1207 if (find_special (name, &sym))
1212 /* If this symbol is confirming an implicit parameter type,
1213 then an initialization expression is not allowed. */
1214 if (attr.flavor == FL_PARAMETER
1215 && sym->value != NULL
1218 gfc_error ("Initializer not allowed for PARAMETER '%s' at %C",
1225 /* An initializer is required for PARAMETER declarations. */
1226 if (attr.flavor == FL_PARAMETER)
1228 gfc_error ("PARAMETER at %L is missing an initializer", var_locus);
1234 /* If a variable appears in a DATA block, it cannot have an
1238 gfc_error ("Variable '%s' at %C with an initializer already "
1239 "appears in a DATA statement", sym->name);
1243 /* Check if the assignment can happen. This has to be put off
1244 until later for a derived type variable. */
1245 if (sym->ts.type != BT_DERIVED && init->ts.type != BT_DERIVED
1246 && gfc_check_assign_symbol (sym, init) == FAILURE)
1249 if (sym->ts.type == BT_CHARACTER && sym->ts.cl)
1251 /* Update symbol character length according initializer. */
1252 if (sym->ts.cl->length == NULL)
1255 /* If there are multiple CHARACTER variables declared on the
1256 same line, we don't want them to share the same length. */
1257 sym->ts.cl = gfc_get_charlen ();
1258 sym->ts.cl->next = gfc_current_ns->cl_list;
1259 gfc_current_ns->cl_list = sym->ts.cl;
1261 if (sym->attr.flavor == FL_PARAMETER)
1263 if (init->expr_type == EXPR_CONSTANT)
1265 clen = init->value.character.length;
1266 sym->ts.cl->length = gfc_int_expr (clen);
1268 else if (init->expr_type == EXPR_ARRAY)
1270 gfc_expr *p = init->value.constructor->expr;
1271 clen = p->value.character.length;
1272 sym->ts.cl->length = gfc_int_expr (clen);
1274 else if (init->ts.cl && init->ts.cl->length)
1275 sym->ts.cl->length =
1276 gfc_copy_expr (sym->value->ts.cl->length);
1279 /* Update initializer character length according symbol. */
1280 else if (sym->ts.cl->length->expr_type == EXPR_CONSTANT)
1282 int len = mpz_get_si (sym->ts.cl->length->value.integer);
1283 gfc_constructor * p;
1285 if (init->expr_type == EXPR_CONSTANT)
1286 gfc_set_constant_character_len (len, init, -1);
1287 else if (init->expr_type == EXPR_ARRAY)
1289 /* Build a new charlen to prevent simplification from
1290 deleting the length before it is resolved. */
1291 init->ts.cl = gfc_get_charlen ();
1292 init->ts.cl->next = gfc_current_ns->cl_list;
1293 gfc_current_ns->cl_list = sym->ts.cl;
1294 init->ts.cl->length = gfc_copy_expr (sym->ts.cl->length);
1296 for (p = init->value.constructor; p; p = p->next)
1297 gfc_set_constant_character_len (len, p->expr, -1);
1302 /* Need to check if the expression we initialized this
1303 to was one of the iso_c_binding named constants. If so,
1304 and we're a parameter (constant), let it be iso_c.
1306 integer(c_int), parameter :: my_int = c_int
1307 integer(my_int) :: my_int_2
1308 If we mark my_int as iso_c (since we can see it's value
1309 is equal to one of the named constants), then my_int_2
1310 will be considered C interoperable. */
1311 if (sym->ts.type != BT_CHARACTER && sym->ts.type != BT_DERIVED)
1313 sym->ts.is_iso_c |= init->ts.is_iso_c;
1314 sym->ts.is_c_interop |= init->ts.is_c_interop;
1315 /* attr bits needed for module files. */
1316 sym->attr.is_iso_c |= init->ts.is_iso_c;
1317 sym->attr.is_c_interop |= init->ts.is_c_interop;
1318 if (init->ts.is_iso_c)
1319 sym->ts.f90_type = init->ts.f90_type;
1322 /* Add initializer. Make sure we keep the ranks sane. */
1323 if (sym->attr.dimension && init->rank == 0)
1329 if (sym->attr.flavor == FL_PARAMETER
1330 && init->expr_type == EXPR_CONSTANT
1331 && spec_size (sym->as, &size) == SUCCESS
1332 && mpz_cmp_si (size, 0) > 0)
1334 array = gfc_start_constructor (init->ts.type, init->ts.kind,
1337 array->value.constructor = c = NULL;
1338 for (n = 0; n < (int)mpz_get_si (size); n++)
1340 if (array->value.constructor == NULL)
1342 array->value.constructor = c = gfc_get_constructor ();
1347 c->next = gfc_get_constructor ();
1349 c->expr = gfc_copy_expr (init);
1353 array->shape = gfc_get_shape (sym->as->rank);
1354 for (n = 0; n < sym->as->rank; n++)
1355 spec_dimen_size (sym->as, n, &array->shape[n]);
1360 init->rank = sym->as->rank;
1364 if (sym->attr.save == SAVE_NONE)
1365 sym->attr.save = SAVE_IMPLICIT;
1373 /* Function called by variable_decl() that adds a name to a structure
1377 build_struct (const char *name, gfc_charlen *cl, gfc_expr **init,
1378 gfc_array_spec **as)
1382 /* If the current symbol is of the same derived type that we're
1383 constructing, it must have the pointer attribute. */
1384 if (current_ts.type == BT_DERIVED
1385 && current_ts.derived == gfc_current_block ()
1386 && current_attr.pointer == 0)
1388 gfc_error ("Component at %C must have the POINTER attribute");
1392 if (gfc_current_block ()->attr.pointer && (*as)->rank != 0)
1394 if ((*as)->type != AS_DEFERRED && (*as)->type != AS_EXPLICIT)
1396 gfc_error ("Array component of structure at %C must have explicit "
1397 "or deferred shape");
1402 if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE)
1407 c->attr = current_attr;
1409 c->initializer = *init;
1414 c->attr.dimension = 1;
1417 /* Should this ever get more complicated, combine with similar section
1418 in add_init_expr_to_sym into a separate function. */
1419 if (c->ts.type == BT_CHARACTER && !c->attr.pointer && c->initializer && c->ts.cl
1420 && c->ts.cl->length && c->ts.cl->length->expr_type == EXPR_CONSTANT)
1424 gcc_assert (c->ts.cl && c->ts.cl->length);
1425 gcc_assert (c->ts.cl->length->expr_type == EXPR_CONSTANT);
1426 gcc_assert (c->ts.cl->length->ts.type == BT_INTEGER);
1428 len = mpz_get_si (c->ts.cl->length->value.integer);
1430 if (c->initializer->expr_type == EXPR_CONSTANT)
1431 gfc_set_constant_character_len (len, c->initializer, -1);
1432 else if (mpz_cmp (c->ts.cl->length->value.integer,
1433 c->initializer->ts.cl->length->value.integer))
1436 gfc_constructor *ctor = c->initializer->value.constructor;
1438 has_ts = (c->initializer->ts.cl
1439 && c->initializer->ts.cl->length_from_typespec);
1445 /* Remember the length of the first element for checking
1446 that all elements *in the constructor* have the same
1447 length. This need not be the length of the LHS! */
1448 gcc_assert (ctor->expr->expr_type == EXPR_CONSTANT);
1449 gcc_assert (ctor->expr->ts.type == BT_CHARACTER);
1450 first_len = ctor->expr->value.character.length;
1452 for (; ctor; ctor = ctor->next)
1454 if (ctor->expr->expr_type == EXPR_CONSTANT)
1455 gfc_set_constant_character_len (len, ctor->expr,
1456 has_ts ? -1 : first_len);
1462 /* Check array components. */
1463 if (!c->attr.dimension)
1465 if (c->attr.allocatable)
1467 gfc_error ("Allocatable component at %C must be an array");
1474 if (c->attr.pointer)
1476 if (c->as->type != AS_DEFERRED)
1478 gfc_error ("Pointer array component of structure at %C must have a "
1483 else if (c->attr.allocatable)
1485 if (c->as->type != AS_DEFERRED)
1487 gfc_error ("Allocatable component of structure at %C must have a "
1494 if (c->as->type != AS_EXPLICIT)
1496 gfc_error ("Array component of structure at %C must have an "
1506 /* Match a 'NULL()', and possibly take care of some side effects. */
1509 gfc_match_null (gfc_expr **result)
1515 m = gfc_match (" null ( )");
1519 /* The NULL symbol now has to be/become an intrinsic function. */
1520 if (gfc_get_symbol ("null", NULL, &sym))
1522 gfc_error ("NULL() initialization at %C is ambiguous");
1526 gfc_intrinsic_symbol (sym);
1528 if (sym->attr.proc != PROC_INTRINSIC
1529 && (gfc_add_procedure (&sym->attr, PROC_INTRINSIC,
1530 sym->name, NULL) == FAILURE
1531 || gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE))
1534 e = gfc_get_expr ();
1535 e->where = gfc_current_locus;
1536 e->expr_type = EXPR_NULL;
1537 e->ts.type = BT_UNKNOWN;
1545 /* Match a variable name with an optional initializer. When this
1546 subroutine is called, a variable is expected to be parsed next.
1547 Depending on what is happening at the moment, updates either the
1548 symbol table or the current interface. */
1551 variable_decl (int elem)
1553 char name[GFC_MAX_SYMBOL_LEN + 1];
1554 gfc_expr *initializer, *char_len;
1556 gfc_array_spec *cp_as; /* Extra copy for Cray Pointees. */
1567 old_locus = gfc_current_locus;
1569 /* When we get here, we've just matched a list of attributes and
1570 maybe a type and a double colon. The next thing we expect to see
1571 is the name of the symbol. */
1572 m = gfc_match_name (name);
1576 var_locus = gfc_current_locus;
1578 /* Now we could see the optional array spec. or character length. */
1579 m = gfc_match_array_spec (&as);
1580 if (gfc_option.flag_cray_pointer && m == MATCH_YES)
1581 cp_as = gfc_copy_array_spec (as);
1582 else if (m == MATCH_ERROR)
1586 as = gfc_copy_array_spec (current_as);
1591 if (current_ts.type == BT_CHARACTER)
1593 switch (match_char_length (&char_len))
1596 cl = gfc_get_charlen ();
1597 cl->next = gfc_current_ns->cl_list;
1598 gfc_current_ns->cl_list = cl;
1600 cl->length = char_len;
1603 /* Non-constant lengths need to be copied after the first
1604 element. Also copy assumed lengths. */
1607 && (current_ts.cl->length == NULL
1608 || current_ts.cl->length->expr_type != EXPR_CONSTANT))
1610 cl = gfc_get_charlen ();
1611 cl->next = gfc_current_ns->cl_list;
1612 gfc_current_ns->cl_list = cl;
1613 cl->length = gfc_copy_expr (current_ts.cl->length);
1625 /* If this symbol has already shown up in a Cray Pointer declaration,
1626 then we want to set the type & bail out. */
1627 if (gfc_option.flag_cray_pointer)
1629 gfc_find_symbol (name, gfc_current_ns, 1, &sym);
1630 if (sym != NULL && sym->attr.cray_pointee)
1632 sym->ts.type = current_ts.type;
1633 sym->ts.kind = current_ts.kind;
1635 sym->ts.derived = current_ts.derived;
1636 sym->ts.is_c_interop = current_ts.is_c_interop;
1637 sym->ts.is_iso_c = current_ts.is_iso_c;
1640 /* Check to see if we have an array specification. */
1643 if (sym->as != NULL)
1645 gfc_error ("Duplicate array spec for Cray pointee at %C");
1646 gfc_free_array_spec (cp_as);
1652 if (gfc_set_array_spec (sym, cp_as, &var_locus) == FAILURE)
1653 gfc_internal_error ("Couldn't set pointee array spec.");
1655 /* Fix the array spec. */
1656 m = gfc_mod_pointee_as (sym->as);
1657 if (m == MATCH_ERROR)
1665 gfc_free_array_spec (cp_as);
1669 /* Procedure pointer as function result. */
1670 if (gfc_current_state () == COMP_FUNCTION
1671 && strcmp ("ppr@", gfc_current_block ()->name) == 0
1672 && strcmp (name, gfc_current_block ()->ns->proc_name->name) == 0)
1673 strcpy (name, "ppr@");
1675 if (gfc_current_state () == COMP_FUNCTION
1676 && strcmp (name, gfc_current_block ()->name) == 0
1677 && gfc_current_block ()->result
1678 && strcmp ("ppr@", gfc_current_block ()->result->name) == 0)
1679 strcpy (name, "ppr@");
1681 /* OK, we've successfully matched the declaration. Now put the
1682 symbol in the current namespace, because it might be used in the
1683 optional initialization expression for this symbol, e.g. this is
1686 integer, parameter :: i = huge(i)
1688 This is only true for parameters or variables of a basic type.
1689 For components of derived types, it is not true, so we don't
1690 create a symbol for those yet. If we fail to create the symbol,
1692 if (gfc_current_state () != COMP_DERIVED
1693 && build_sym (name, cl, &as, &var_locus) == FAILURE)
1699 /* An interface body specifies all of the procedure's
1700 characteristics and these shall be consistent with those
1701 specified in the procedure definition, except that the interface
1702 may specify a procedure that is not pure if the procedure is
1703 defined to be pure(12.3.2). */
1704 if (current_ts.type == BT_DERIVED
1705 && gfc_current_ns->proc_name
1706 && gfc_current_ns->proc_name->attr.if_source == IFSRC_IFBODY
1707 && current_ts.derived->ns != gfc_current_ns)
1710 st = gfc_find_symtree (gfc_current_ns->sym_root, current_ts.derived->name);
1711 if (!(current_ts.derived->attr.imported
1713 && st->n.sym == current_ts.derived)
1714 && !gfc_current_ns->has_import_set)
1716 gfc_error ("the type of '%s' at %C has not been declared within the "
1723 /* In functions that have a RESULT variable defined, the function
1724 name always refers to function calls. Therefore, the name is
1725 not allowed to appear in specification statements. */
1726 if (gfc_current_state () == COMP_FUNCTION
1727 && gfc_current_block () != NULL
1728 && gfc_current_block ()->result != NULL
1729 && gfc_current_block ()->result != gfc_current_block ()
1730 && strcmp (gfc_current_block ()->name, name) == 0)
1732 gfc_error ("Function name '%s' not allowed at %C", name);
1737 /* We allow old-style initializations of the form
1738 integer i /2/, j(4) /3*3, 1/
1739 (if no colon has been seen). These are different from data
1740 statements in that initializers are only allowed to apply to the
1741 variable immediately preceding, i.e.
1743 is not allowed. Therefore we have to do some work manually, that
1744 could otherwise be left to the matchers for DATA statements. */
1746 if (!colon_seen && gfc_match (" /") == MATCH_YES)
1748 if (gfc_notify_std (GFC_STD_GNU, "Extension: Old-style "
1749 "initialization at %C") == FAILURE)
1752 return match_old_style_init (name);
1755 /* The double colon must be present in order to have initializers.
1756 Otherwise the statement is ambiguous with an assignment statement. */
1759 if (gfc_match (" =>") == MATCH_YES)
1761 if (!current_attr.pointer)
1763 gfc_error ("Initialization at %C isn't for a pointer variable");
1768 m = gfc_match_null (&initializer);
1771 gfc_error ("Pointer initialization requires a NULL() at %C");
1775 if (gfc_pure (NULL))
1777 gfc_error ("Initialization of pointer at %C is not allowed in "
1778 "a PURE procedure");
1786 else if (gfc_match_char ('=') == MATCH_YES)
1788 if (current_attr.pointer)
1790 gfc_error ("Pointer initialization at %C requires '=>', "
1796 m = gfc_match_init_expr (&initializer);
1799 gfc_error ("Expected an initialization expression at %C");
1803 if (current_attr.flavor != FL_PARAMETER && gfc_pure (NULL))
1805 gfc_error ("Initialization of variable at %C is not allowed in "
1806 "a PURE procedure");
1815 if (initializer != NULL && current_attr.allocatable
1816 && gfc_current_state () == COMP_DERIVED)
1818 gfc_error ("Initialization of allocatable component at %C is not "
1824 /* Add the initializer. Note that it is fine if initializer is
1825 NULL here, because we sometimes also need to check if a
1826 declaration *must* have an initialization expression. */
1827 if (gfc_current_state () != COMP_DERIVED)
1828 t = add_init_expr_to_sym (name, &initializer, &var_locus);
1831 if (current_ts.type == BT_DERIVED
1832 && !current_attr.pointer && !initializer)
1833 initializer = gfc_default_initializer (¤t_ts);
1834 t = build_struct (name, cl, &initializer, &as);
1837 m = (t == SUCCESS) ? MATCH_YES : MATCH_ERROR;
1840 /* Free stuff up and return. */
1841 gfc_free_expr (initializer);
1842 gfc_free_array_spec (as);
1848 /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification.
1849 This assumes that the byte size is equal to the kind number for
1850 non-COMPLEX types, and equal to twice the kind number for COMPLEX. */
1853 gfc_match_old_kind_spec (gfc_typespec *ts)
1858 if (gfc_match_char ('*') != MATCH_YES)
1861 m = gfc_match_small_literal_int (&ts->kind, NULL);
1865 original_kind = ts->kind;
1867 /* Massage the kind numbers for complex types. */
1868 if (ts->type == BT_COMPLEX)
1872 gfc_error ("Old-style type declaration %s*%d not supported at %C",
1873 gfc_basic_typename (ts->type), original_kind);
1879 if (gfc_validate_kind (ts->type, ts->kind, true) < 0)
1881 gfc_error ("Old-style type declaration %s*%d not supported at %C",
1882 gfc_basic_typename (ts->type), original_kind);
1886 if (gfc_notify_std (GFC_STD_GNU, "Nonstandard type declaration %s*%d at %C",
1887 gfc_basic_typename (ts->type), original_kind) == FAILURE)
1894 /* Match a kind specification. Since kinds are generally optional, we
1895 usually return MATCH_NO if something goes wrong. If a "kind="
1896 string is found, then we know we have an error. */
1899 gfc_match_kind_spec (gfc_typespec *ts, bool kind_expr_only)
1911 where = loc = gfc_current_locus;
1916 if (gfc_match_char ('(') == MATCH_NO)
1919 /* Also gobbles optional text. */
1920 if (gfc_match (" kind = ") == MATCH_YES)
1923 loc = gfc_current_locus;
1926 n = gfc_match_init_expr (&e);
1930 if (gfc_matching_function)
1932 /* The function kind expression might include use associated or
1933 imported parameters and try again after the specification
1935 if (gfc_match_char (')') != MATCH_YES)
1937 gfc_error ("Missing right parenthesis at %C");
1943 gfc_undo_symbols ();
1948 /* ....or else, the match is real. */
1950 gfc_error ("Expected initialization expression at %C");
1958 gfc_error ("Expected scalar initialization expression at %C");
1963 msg = gfc_extract_int (e, &ts->kind);
1972 /* Before throwing away the expression, let's see if we had a
1973 C interoperable kind (and store the fact). */
1974 if (e->ts.is_c_interop == 1)
1976 /* Mark this as c interoperable if being declared with one
1977 of the named constants from iso_c_binding. */
1978 ts->is_c_interop = e->ts.is_iso_c;
1979 ts->f90_type = e->ts.f90_type;
1985 /* Ignore errors to this point, if we've gotten here. This means
1986 we ignore the m=MATCH_ERROR from above. */
1987 if (gfc_validate_kind (ts->type, ts->kind, true) < 0)
1989 gfc_error ("Kind %d not supported for type %s at %C", ts->kind,
1990 gfc_basic_typename (ts->type));
1991 gfc_current_locus = where;
1995 /* Warn if, e.g., c_int is used for a REAL variable, but not
1996 if, e.g., c_double is used for COMPLEX as the standard
1997 explicitly says that the kind type parameter for complex and real
1998 variable is the same, i.e. c_float == c_float_complex. */
1999 if (ts->f90_type != BT_UNKNOWN && ts->f90_type != ts->type
2000 && !((ts->f90_type == BT_REAL && ts->type == BT_COMPLEX)
2001 || (ts->f90_type == BT_COMPLEX && ts->type == BT_REAL)))
2002 gfc_warning_now ("C kind type parameter is for type %s but type at %L "
2003 "is %s", gfc_basic_typename (ts->f90_type), &where,
2004 gfc_basic_typename (ts->type));
2006 gfc_gobble_whitespace ();
2007 if ((c = gfc_next_ascii_char ()) != ')'
2008 && (ts->type != BT_CHARACTER || c != ','))
2010 if (ts->type == BT_CHARACTER)
2011 gfc_error ("Missing right parenthesis or comma at %C");
2013 gfc_error ("Missing right parenthesis at %C");
2017 /* All tests passed. */
2020 if(m == MATCH_ERROR)
2021 gfc_current_locus = where;
2023 /* Return what we know from the test(s). */
2028 gfc_current_locus = where;
2034 match_char_kind (int * kind, int * is_iso_c)
2043 where = gfc_current_locus;
2045 n = gfc_match_init_expr (&e);
2047 if (n != MATCH_YES && gfc_matching_function)
2049 /* The expression might include use-associated or imported
2050 parameters and try again after the specification
2053 gfc_undo_symbols ();
2058 gfc_error ("Expected initialization expression at %C");
2064 gfc_error ("Expected scalar initialization expression at %C");
2069 msg = gfc_extract_int (e, kind);
2070 *is_iso_c = e->ts.is_iso_c;
2080 /* Ignore errors to this point, if we've gotten here. This means
2081 we ignore the m=MATCH_ERROR from above. */
2082 if (gfc_validate_kind (BT_CHARACTER, *kind, true) < 0)
2084 gfc_error ("Kind %d is not supported for CHARACTER at %C", *kind);
2088 /* All tests passed. */
2091 if (m == MATCH_ERROR)
2092 gfc_current_locus = where;
2094 /* Return what we know from the test(s). */
2099 gfc_current_locus = where;
2103 /* Match the various kind/length specifications in a CHARACTER
2104 declaration. We don't return MATCH_NO. */
2107 match_char_spec (gfc_typespec *ts)
2109 int kind, seen_length, is_iso_c;
2119 /* Try the old-style specification first. */
2120 old_char_selector = 0;
2122 m = match_char_length (&len);
2126 old_char_selector = 1;
2131 m = gfc_match_char ('(');
2134 m = MATCH_YES; /* Character without length is a single char. */
2138 /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ). */
2139 if (gfc_match (" kind =") == MATCH_YES)
2141 m = match_char_kind (&kind, &is_iso_c);
2143 if (m == MATCH_ERROR)
2148 if (gfc_match (" , len =") == MATCH_NO)
2151 m = char_len_param_value (&len);
2154 if (m == MATCH_ERROR)
2161 /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>". */
2162 if (gfc_match (" len =") == MATCH_YES)
2164 m = char_len_param_value (&len);
2167 if (m == MATCH_ERROR)
2171 if (gfc_match_char (')') == MATCH_YES)
2174 if (gfc_match (" , kind =") != MATCH_YES)
2177 if (match_char_kind (&kind, &is_iso_c) == MATCH_ERROR)
2183 /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */
2184 m = char_len_param_value (&len);
2187 if (m == MATCH_ERROR)
2191 m = gfc_match_char (')');
2195 if (gfc_match_char (',') != MATCH_YES)
2198 gfc_match (" kind ="); /* Gobble optional text. */
2200 m = match_char_kind (&kind, &is_iso_c);
2201 if (m == MATCH_ERROR)
2207 /* Require a right-paren at this point. */
2208 m = gfc_match_char (')');
2213 gfc_error ("Syntax error in CHARACTER declaration at %C");
2215 gfc_free_expr (len);
2219 /* Deal with character functions after USE and IMPORT statements. */
2220 if (gfc_matching_function)
2222 gfc_free_expr (len);
2223 gfc_undo_symbols ();
2229 gfc_free_expr (len);
2233 /* Do some final massaging of the length values. */
2234 cl = gfc_get_charlen ();
2235 cl->next = gfc_current_ns->cl_list;
2236 gfc_current_ns->cl_list = cl;
2238 if (seen_length == 0)
2239 cl->length = gfc_int_expr (1);
2244 ts->kind = kind == 0 ? gfc_default_character_kind : kind;
2246 /* We have to know if it was a c interoperable kind so we can
2247 do accurate type checking of bind(c) procs, etc. */
2249 /* Mark this as c interoperable if being declared with one
2250 of the named constants from iso_c_binding. */
2251 ts->is_c_interop = is_iso_c;
2252 else if (len != NULL)
2253 /* Here, we might have parsed something such as: character(c_char)
2254 In this case, the parsing code above grabs the c_char when
2255 looking for the length (line 1690, roughly). it's the last
2256 testcase for parsing the kind params of a character variable.
2257 However, it's not actually the length. this seems like it
2259 To see if the user used a C interop kind, test the expr
2260 of the so called length, and see if it's C interoperable. */
2261 ts->is_c_interop = len->ts.is_iso_c;
2267 /* Matches a type specification. If successful, sets the ts structure
2268 to the matched specification. This is necessary for FUNCTION and
2269 IMPLICIT statements.
2271 If implicit_flag is nonzero, then we don't check for the optional
2272 kind specification. Not doing so is needed for matching an IMPLICIT
2273 statement correctly. */
2276 gfc_match_type_spec (gfc_typespec *ts, int implicit_flag)
2278 char name[GFC_MAX_SYMBOL_LEN + 1];
2282 bool seen_deferred_kind;
2284 /* A belt and braces check that the typespec is correctly being treated
2285 as a deferred characteristic association. */
2286 seen_deferred_kind = (gfc_current_state () == COMP_FUNCTION)
2287 && (gfc_current_block ()->result->ts.kind == -1)
2288 && (ts->kind == -1);
2290 if (seen_deferred_kind)
2293 /* Clear the current binding label, in case one is given. */
2294 curr_binding_label[0] = '\0';
2296 if (gfc_match (" byte") == MATCH_YES)
2298 if (gfc_notify_std(GFC_STD_GNU, "Extension: BYTE type at %C")
2302 if (gfc_validate_kind (BT_INTEGER, 1, true) < 0)
2304 gfc_error ("BYTE type used at %C "
2305 "is not available on the target machine");
2309 ts->type = BT_INTEGER;
2314 if (gfc_match (" integer") == MATCH_YES)
2316 ts->type = BT_INTEGER;
2317 ts->kind = gfc_default_integer_kind;
2321 if (gfc_match (" character") == MATCH_YES)
2323 ts->type = BT_CHARACTER;
2324 if (implicit_flag == 0)
2325 return match_char_spec (ts);
2330 if (gfc_match (" real") == MATCH_YES)
2333 ts->kind = gfc_default_real_kind;
2337 if (gfc_match (" double precision") == MATCH_YES)
2340 ts->kind = gfc_default_double_kind;
2344 if (gfc_match (" complex") == MATCH_YES)
2346 ts->type = BT_COMPLEX;
2347 ts->kind = gfc_default_complex_kind;
2351 if (gfc_match (" double complex") == MATCH_YES)
2353 if (gfc_notify_std (GFC_STD_GNU, "DOUBLE COMPLEX at %C does not "
2354 "conform to the Fortran 95 standard") == FAILURE)
2357 ts->type = BT_COMPLEX;
2358 ts->kind = gfc_default_double_kind;
2362 if (gfc_match (" logical") == MATCH_YES)
2364 ts->type = BT_LOGICAL;
2365 ts->kind = gfc_default_logical_kind;
2369 m = gfc_match (" type ( %n )", name);
2373 ts->type = BT_DERIVED;
2375 /* Defer association of the derived type until the end of the
2376 specification block. However, if the derived type can be
2377 found, add it to the typespec. */
2378 if (gfc_matching_function)
2381 if (gfc_current_state () != COMP_INTERFACE
2382 && !gfc_find_symbol (name, NULL, 1, &sym) && sym)
2387 /* Search for the name but allow the components to be defined later. If
2388 type = -1, this typespec has been seen in a function declaration but
2389 the type could not be accessed at that point. */
2391 if (ts->kind != -1 && gfc_get_ha_symbol (name, &sym))
2393 gfc_error ("Type name '%s' at %C is ambiguous", name);
2396 else if (ts->kind == -1)
2398 int iface = gfc_state_stack->previous->state != COMP_INTERFACE
2399 || gfc_current_ns->has_import_set;
2400 if (gfc_find_symbol (name, NULL, iface, &sym))
2402 gfc_error ("Type name '%s' at %C is ambiguous", name);
2411 if (sym->attr.flavor != FL_DERIVED
2412 && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE)
2415 gfc_set_sym_referenced (sym);
2421 /* For all types except double, derived and character, look for an
2422 optional kind specifier. MATCH_NO is actually OK at this point. */
2423 if (implicit_flag == 1)
2426 if (gfc_current_form == FORM_FREE)
2428 c = gfc_peek_ascii_char();
2429 if (!gfc_is_whitespace(c) && c != '*' && c != '('
2430 && c != ':' && c != ',')
2434 m = gfc_match_kind_spec (ts, false);
2435 if (m == MATCH_NO && ts->type != BT_CHARACTER)
2436 m = gfc_match_old_kind_spec (ts);
2438 /* Defer association of the KIND expression of function results
2439 until after USE and IMPORT statements. */
2440 if ((gfc_current_state () == COMP_NONE && gfc_error_flag_test ())
2441 || gfc_matching_function)
2445 m = MATCH_YES; /* No kind specifier found. */
2451 /* Match an IMPLICIT NONE statement. Actually, this statement is
2452 already matched in parse.c, or we would not end up here in the
2453 first place. So the only thing we need to check, is if there is
2454 trailing garbage. If not, the match is successful. */
2457 gfc_match_implicit_none (void)
2459 return (gfc_match_eos () == MATCH_YES) ? MATCH_YES : MATCH_NO;
2463 /* Match the letter range(s) of an IMPLICIT statement. */
2466 match_implicit_range (void)
2472 cur_loc = gfc_current_locus;
2474 gfc_gobble_whitespace ();
2475 c = gfc_next_ascii_char ();
2478 gfc_error ("Missing character range in IMPLICIT at %C");
2485 gfc_gobble_whitespace ();
2486 c1 = gfc_next_ascii_char ();
2490 gfc_gobble_whitespace ();
2491 c = gfc_next_ascii_char ();
2496 inner = 0; /* Fall through. */
2503 gfc_gobble_whitespace ();
2504 c2 = gfc_next_ascii_char ();
2508 gfc_gobble_whitespace ();
2509 c = gfc_next_ascii_char ();
2511 if ((c != ',') && (c != ')'))
2524 gfc_error ("Letters must be in alphabetic order in "
2525 "IMPLICIT statement at %C");
2529 /* See if we can add the newly matched range to the pending
2530 implicits from this IMPLICIT statement. We do not check for
2531 conflicts with whatever earlier IMPLICIT statements may have
2532 set. This is done when we've successfully finished matching
2534 if (gfc_add_new_implicit_range (c1, c2) != SUCCESS)
2541 gfc_syntax_error (ST_IMPLICIT);
2543 gfc_current_locus = cur_loc;
2548 /* Match an IMPLICIT statement, storing the types for
2549 gfc_set_implicit() if the statement is accepted by the parser.
2550 There is a strange looking, but legal syntactic construction
2551 possible. It looks like:
2553 IMPLICIT INTEGER (a-b) (c-d)
2555 This is legal if "a-b" is a constant expression that happens to
2556 equal one of the legal kinds for integers. The real problem
2557 happens with an implicit specification that looks like:
2559 IMPLICIT INTEGER (a-b)
2561 In this case, a typespec matcher that is "greedy" (as most of the
2562 matchers are) gobbles the character range as a kindspec, leaving
2563 nothing left. We therefore have to go a bit more slowly in the
2564 matching process by inhibiting the kindspec checking during
2565 typespec matching and checking for a kind later. */
2568 gfc_match_implicit (void)
2577 /* We don't allow empty implicit statements. */
2578 if (gfc_match_eos () == MATCH_YES)
2580 gfc_error ("Empty IMPLICIT statement at %C");
2586 /* First cleanup. */
2587 gfc_clear_new_implicit ();
2589 /* A basic type is mandatory here. */
2590 m = gfc_match_type_spec (&ts, 1);
2591 if (m == MATCH_ERROR)
2596 cur_loc = gfc_current_locus;
2597 m = match_implicit_range ();
2601 /* We may have <TYPE> (<RANGE>). */
2602 gfc_gobble_whitespace ();
2603 c = gfc_next_ascii_char ();
2604 if ((c == '\n') || (c == ','))
2606 /* Check for CHARACTER with no length parameter. */
2607 if (ts.type == BT_CHARACTER && !ts.cl)
2609 ts.kind = gfc_default_character_kind;
2610 ts.cl = gfc_get_charlen ();
2611 ts.cl->next = gfc_current_ns->cl_list;
2612 gfc_current_ns->cl_list = ts.cl;
2613 ts.cl->length = gfc_int_expr (1);
2616 /* Record the Successful match. */
2617 if (gfc_merge_new_implicit (&ts) != SUCCESS)
2622 gfc_current_locus = cur_loc;
2625 /* Discard the (incorrectly) matched range. */
2626 gfc_clear_new_implicit ();
2628 /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */
2629 if (ts.type == BT_CHARACTER)
2630 m = match_char_spec (&ts);
2633 m = gfc_match_kind_spec (&ts, false);
2636 m = gfc_match_old_kind_spec (&ts);
2637 if (m == MATCH_ERROR)
2643 if (m == MATCH_ERROR)
2646 m = match_implicit_range ();
2647 if (m == MATCH_ERROR)
2652 gfc_gobble_whitespace ();
2653 c = gfc_next_ascii_char ();
2654 if ((c != '\n') && (c != ','))
2657 if (gfc_merge_new_implicit (&ts) != SUCCESS)
2665 gfc_syntax_error (ST_IMPLICIT);
2673 gfc_match_import (void)
2675 char name[GFC_MAX_SYMBOL_LEN + 1];
2680 if (gfc_current_ns->proc_name == NULL
2681 || gfc_current_ns->proc_name->attr.if_source != IFSRC_IFBODY)
2683 gfc_error ("IMPORT statement at %C only permitted in "
2684 "an INTERFACE body");
2688 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IMPORT statement at %C")
2692 if (gfc_match_eos () == MATCH_YES)
2694 /* All host variables should be imported. */
2695 gfc_current_ns->has_import_set = 1;
2699 if (gfc_match (" ::") == MATCH_YES)
2701 if (gfc_match_eos () == MATCH_YES)
2703 gfc_error ("Expecting list of named entities at %C");
2710 m = gfc_match (" %n", name);
2714 if (gfc_current_ns->parent != NULL
2715 && gfc_find_symbol (name, gfc_current_ns->parent, 1, &sym))
2717 gfc_error ("Type name '%s' at %C is ambiguous", name);
2720 else if (gfc_current_ns->proc_name->ns->parent != NULL
2721 && gfc_find_symbol (name,
2722 gfc_current_ns->proc_name->ns->parent,
2725 gfc_error ("Type name '%s' at %C is ambiguous", name);
2731 gfc_error ("Cannot IMPORT '%s' from host scoping unit "
2732 "at %C - does not exist.", name);
2736 if (gfc_find_symtree (gfc_current_ns->sym_root,name))
2738 gfc_warning ("'%s' is already IMPORTed from host scoping unit "
2743 st = gfc_new_symtree (&gfc_current_ns->sym_root, sym->name);
2746 sym->attr.imported = 1;
2758 if (gfc_match_eos () == MATCH_YES)
2760 if (gfc_match_char (',') != MATCH_YES)
2767 gfc_error ("Syntax error in IMPORT statement at %C");
2772 /* A minimal implementation of gfc_match without whitespace, escape
2773 characters or variable arguments. Returns true if the next
2774 characters match the TARGET template exactly. */
2777 match_string_p (const char *target)
2781 for (p = target; *p; p++)
2782 if ((char) gfc_next_ascii_char () != *p)
2787 /* Matches an attribute specification including array specs. If
2788 successful, leaves the variables current_attr and current_as
2789 holding the specification. Also sets the colon_seen variable for
2790 later use by matchers associated with initializations.
2792 This subroutine is a little tricky in the sense that we don't know
2793 if we really have an attr-spec until we hit the double colon.
2794 Until that time, we can only return MATCH_NO. This forces us to
2795 check for duplicate specification at this level. */
2798 match_attr_spec (void)
2800 /* Modifiers that can exist in a type statement. */
2802 { GFC_DECL_BEGIN = 0,
2803 DECL_ALLOCATABLE = GFC_DECL_BEGIN, DECL_DIMENSION, DECL_EXTERNAL,
2804 DECL_IN, DECL_OUT, DECL_INOUT, DECL_INTRINSIC, DECL_OPTIONAL,
2805 DECL_PARAMETER, DECL_POINTER, DECL_PROTECTED, DECL_PRIVATE,
2806 DECL_PUBLIC, DECL_SAVE, DECL_TARGET, DECL_VALUE, DECL_VOLATILE,
2807 DECL_IS_BIND_C, DECL_NONE,
2808 GFC_DECL_END /* Sentinel */
2812 /* GFC_DECL_END is the sentinel, index starts at 0. */
2813 #define NUM_DECL GFC_DECL_END
2815 locus start, seen_at[NUM_DECL];
2822 gfc_clear_attr (¤t_attr);
2823 start = gfc_current_locus;
2828 /* See if we get all of the keywords up to the final double colon. */
2829 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
2837 gfc_gobble_whitespace ();
2839 ch = gfc_next_ascii_char ();
2842 /* This is the successful exit condition for the loop. */
2843 if (gfc_next_ascii_char () == ':')
2848 gfc_gobble_whitespace ();
2849 switch (gfc_peek_ascii_char ())
2852 if (match_string_p ("allocatable"))
2853 d = DECL_ALLOCATABLE;
2857 /* Try and match the bind(c). */
2858 m = gfc_match_bind_c (NULL, true);
2861 else if (m == MATCH_ERROR)
2866 if (match_string_p ("dimension"))
2871 if (match_string_p ("external"))
2876 if (match_string_p ("int"))
2878 ch = gfc_next_ascii_char ();
2881 if (match_string_p ("nt"))
2883 /* Matched "intent". */
2884 /* TODO: Call match_intent_spec from here. */
2885 if (gfc_match (" ( in out )") == MATCH_YES)
2887 else if (gfc_match (" ( in )") == MATCH_YES)
2889 else if (gfc_match (" ( out )") == MATCH_YES)
2895 if (match_string_p ("insic"))
2897 /* Matched "intrinsic". */
2905 if (match_string_p ("optional"))
2910 gfc_next_ascii_char ();
2911 switch (gfc_next_ascii_char ())
2914 if (match_string_p ("rameter"))
2916 /* Matched "parameter". */
2922 if (match_string_p ("inter"))
2924 /* Matched "pointer". */
2930 ch = gfc_next_ascii_char ();
2933 if (match_string_p ("vate"))
2935 /* Matched "private". */
2941 if (match_string_p ("tected"))
2943 /* Matched "protected". */
2950 if (match_string_p ("blic"))
2952 /* Matched "public". */
2960 if (match_string_p ("save"))
2965 if (match_string_p ("target"))
2970 gfc_next_ascii_char ();
2971 ch = gfc_next_ascii_char ();
2974 if (match_string_p ("lue"))
2976 /* Matched "value". */
2982 if (match_string_p ("latile"))
2984 /* Matched "volatile". */
2992 /* No double colon and no recognizable decl_type, so assume that
2993 we've been looking at something else the whole time. */
3000 /* Check to make sure any parens are paired up correctly. */
3001 if (gfc_match_parens () == MATCH_ERROR)
3008 seen_at[d] = gfc_current_locus;
3010 if (d == DECL_DIMENSION)
3012 m = gfc_match_array_spec (¤t_as);
3016 gfc_error ("Missing dimension specification at %C");
3020 if (m == MATCH_ERROR)
3025 /* Since we've seen a double colon, we have to be looking at an
3026 attr-spec. This means that we can now issue errors. */
3027 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
3032 case DECL_ALLOCATABLE:
3033 attr = "ALLOCATABLE";
3035 case DECL_DIMENSION:
3042 attr = "INTENT (IN)";
3045 attr = "INTENT (OUT)";
3048 attr = "INTENT (IN OUT)";
3050 case DECL_INTRINSIC:
3056 case DECL_PARAMETER:
3062 case DECL_PROTECTED:
3077 case DECL_IS_BIND_C:
3087 attr = NULL; /* This shouldn't happen. */
3090 gfc_error ("Duplicate %s attribute at %L", attr, &seen_at[d]);
3095 /* Now that we've dealt with duplicate attributes, add the attributes
3096 to the current attribute. */
3097 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
3102 if (gfc_current_state () == COMP_DERIVED
3103 && d != DECL_DIMENSION && d != DECL_POINTER
3104 && d != DECL_PRIVATE && d != DECL_PUBLIC
3107 if (d == DECL_ALLOCATABLE)
3109 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ALLOCATABLE "
3110 "attribute at %C in a TYPE definition")
3119 gfc_error ("Attribute at %L is not allowed in a TYPE definition",
3126 if ((d == DECL_PRIVATE || d == DECL_PUBLIC)
3127 && gfc_current_state () != COMP_MODULE)
3129 if (d == DECL_PRIVATE)
3133 if (gfc_current_state () == COMP_DERIVED
3134 && gfc_state_stack->previous
3135 && gfc_state_stack->previous->state == COMP_MODULE)
3137 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Attribute %s "
3138 "at %L in a TYPE definition", attr,
3148 gfc_error ("%s attribute at %L is not allowed outside of the "
3149 "specification part of a module", attr, &seen_at[d]);
3157 case DECL_ALLOCATABLE:
3158 t = gfc_add_allocatable (¤t_attr, &seen_at[d]);
3161 case DECL_DIMENSION:
3162 t = gfc_add_dimension (¤t_attr, NULL, &seen_at[d]);
3166 t = gfc_add_external (¤t_attr, &seen_at[d]);
3170 t = gfc_add_intent (¤t_attr, INTENT_IN, &seen_at[d]);
3174 t = gfc_add_intent (¤t_attr, INTENT_OUT, &seen_at[d]);
3178 t = gfc_add_intent (¤t_attr, INTENT_INOUT, &seen_at[d]);
3181 case DECL_INTRINSIC:
3182 t = gfc_add_intrinsic (¤t_attr, &seen_at[d]);
3186 t = gfc_add_optional (¤t_attr, &seen_at[d]);
3189 case DECL_PARAMETER:
3190 t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, &seen_at[d]);
3194 t = gfc_add_pointer (¤t_attr, &seen_at[d]);
3197 case DECL_PROTECTED:
3198 if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE)
3200 gfc_error ("PROTECTED at %C only allowed in specification "
3201 "part of a module");
3206 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED "
3211 t = gfc_add_protected (¤t_attr, NULL, &seen_at[d]);
3215 t = gfc_add_access (¤t_attr, ACCESS_PRIVATE, NULL,
3220 t = gfc_add_access (¤t_attr, ACCESS_PUBLIC, NULL,
3225 t = gfc_add_save (¤t_attr, NULL, &seen_at[d]);
3229 t = gfc_add_target (¤t_attr, &seen_at[d]);
3232 case DECL_IS_BIND_C:
3233 t = gfc_add_is_bind_c(¤t_attr, NULL, &seen_at[d], 0);
3237 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE attribute "
3242 t = gfc_add_value (¤t_attr, NULL, &seen_at[d]);
3246 if (gfc_notify_std (GFC_STD_F2003,
3247 "Fortran 2003: VOLATILE attribute at %C")
3251 t = gfc_add_volatile (¤t_attr, NULL, &seen_at[d]);
3255 gfc_internal_error ("match_attr_spec(): Bad attribute");
3269 gfc_current_locus = start;
3270 gfc_free_array_spec (current_as);
3276 /* Set the binding label, dest_label, either with the binding label
3277 stored in the given gfc_typespec, ts, or if none was provided, it
3278 will be the symbol name in all lower case, as required by the draft
3279 (J3/04-007, section 15.4.1). If a binding label was given and
3280 there is more than one argument (num_idents), it is an error. */
3283 set_binding_label (char *dest_label, const char *sym_name, int num_idents)
3285 if (num_idents > 1 && has_name_equals)
3287 gfc_error ("Multiple identifiers provided with "
3288 "single NAME= specifier at %C");
3292 if (curr_binding_label[0] != '\0')
3294 /* Binding label given; store in temp holder til have sym. */
3295 strcpy (dest_label, curr_binding_label);
3299 /* No binding label given, and the NAME= specifier did not exist,
3300 which means there was no NAME="". */
3301 if (sym_name != NULL && has_name_equals == 0)
3302 strcpy (dest_label, sym_name);
3309 /* Set the status of the given common block as being BIND(C) or not,
3310 depending on the given parameter, is_bind_c. */
3313 set_com_block_bind_c (gfc_common_head *com_block, int is_bind_c)
3315 com_block->is_bind_c = is_bind_c;
3320 /* Verify that the given gfc_typespec is for a C interoperable type. */
3323 verify_c_interop (gfc_typespec *ts)
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)) != SUCCESS)
3401 /* See if we're dealing with a sym in a common block or not. */
3402 if (is_in_common == 1)
3404 gfc_warning ("Variable '%s' in common block '%s' at %L "
3405 "may not be a C interoperable "
3406 "kind though common block '%s' is BIND(C)",
3407 tmp_sym->name, com_block->name,
3408 &(tmp_sym->declared_at), com_block->name);
3412 if (tmp_sym->ts.type == BT_DERIVED || ts->type == BT_DERIVED)
3413 gfc_error ("Type declaration '%s' at %L is not C "
3414 "interoperable but it is BIND(C)",
3415 tmp_sym->name, &(tmp_sym->declared_at));
3417 gfc_warning ("Variable '%s' at %L "
3418 "may not be a C interoperable "
3419 "kind but it is bind(c)",
3420 tmp_sym->name, &(tmp_sym->declared_at));
3424 /* Variables declared w/in a common block can't be bind(c)
3425 since there's no way for C to see these variables, so there's
3426 semantically no reason for the attribute. */
3427 if (is_in_common == 1 && tmp_sym->attr.is_bind_c == 1)
3429 gfc_error ("Variable '%s' in common block '%s' at "
3430 "%L cannot be declared with BIND(C) "
3431 "since it is not a global",
3432 tmp_sym->name, com_block->name,
3433 &(tmp_sym->declared_at));
3437 /* Scalar variables that are bind(c) can not have the pointer
3438 or allocatable attributes. */
3439 if (tmp_sym->attr.is_bind_c == 1)
3441 if (tmp_sym->attr.pointer == 1)
3443 gfc_error ("Variable '%s' at %L cannot have both the "
3444 "POINTER and BIND(C) attributes",
3445 tmp_sym->name, &(tmp_sym->declared_at));
3449 if (tmp_sym->attr.allocatable == 1)
3451 gfc_error ("Variable '%s' at %L cannot have both the "
3452 "ALLOCATABLE and BIND(C) attributes",
3453 tmp_sym->name, &(tmp_sym->declared_at));
3459 /* If it is a BIND(C) function, make sure the return value is a
3460 scalar value. The previous tests in this function made sure
3461 the type is interoperable. */
3462 if (bind_c_function && tmp_sym->as != NULL)
3463 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3464 "be an array", tmp_sym->name, &(tmp_sym->declared_at));
3466 /* BIND(C) functions can not return a character string. */
3467 if (bind_c_function && tmp_sym->ts.type == BT_CHARACTER)
3468 if (tmp_sym->ts.cl == NULL || tmp_sym->ts.cl->length == NULL
3469 || tmp_sym->ts.cl->length->expr_type != EXPR_CONSTANT
3470 || mpz_cmp_si (tmp_sym->ts.cl->length->value.integer, 1) != 0)
3471 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3472 "be a character string", tmp_sym->name,
3473 &(tmp_sym->declared_at));
3476 /* See if the symbol has been marked as private. If it has, make sure
3477 there is no binding label and warn the user if there is one. */
3478 if (tmp_sym->attr.access == ACCESS_PRIVATE
3479 && tmp_sym->binding_label[0] != '\0')
3480 /* Use gfc_warning_now because we won't say that the symbol fails
3481 just because of this. */
3482 gfc_warning_now ("Symbol '%s' at %L is marked PRIVATE but has been "
3483 "given the binding label '%s'", tmp_sym->name,
3484 &(tmp_sym->declared_at), tmp_sym->binding_label);
3490 /* Set the appropriate fields for a symbol that's been declared as
3491 BIND(C) (the is_bind_c flag and the binding label), and verify that
3492 the type is C interoperable. Errors are reported by the functions
3493 used to set/test these fields. */
3496 set_verify_bind_c_sym (gfc_symbol *tmp_sym, int num_idents)
3498 gfc_try retval = SUCCESS;
3500 /* TODO: Do we need to make sure the vars aren't marked private? */
3502 /* Set the is_bind_c bit in symbol_attribute. */
3503 gfc_add_is_bind_c (&(tmp_sym->attr), tmp_sym->name, &gfc_current_locus, 0);
3505 if (set_binding_label (tmp_sym->binding_label, tmp_sym->name,
3506 num_idents) != SUCCESS)
3513 /* Set the fields marking the given common block as BIND(C), including
3514 a binding label, and report any errors encountered. */
3517 set_verify_bind_c_com_block (gfc_common_head *com_block, int num_idents)
3519 gfc_try retval = SUCCESS;
3521 /* destLabel, common name, typespec (which may have binding label). */
3522 if (set_binding_label (com_block->binding_label, com_block->name, num_idents)
3526 /* Set the given common block (com_block) to being bind(c) (1). */
3527 set_com_block_bind_c (com_block, 1);
3533 /* Retrieve the list of one or more identifiers that the given bind(c)
3534 attribute applies to. */
3537 get_bind_c_idents (void)
3539 char name[GFC_MAX_SYMBOL_LEN + 1];
3541 gfc_symbol *tmp_sym = NULL;
3543 gfc_common_head *com_block = NULL;
3545 if (gfc_match_name (name) == MATCH_YES)
3547 found_id = MATCH_YES;
3548 gfc_get_ha_symbol (name, &tmp_sym);
3550 else if (match_common_name (name) == MATCH_YES)
3552 found_id = MATCH_YES;
3553 com_block = gfc_get_common (name, 0);
3557 gfc_error ("Need either entity or common block name for "
3558 "attribute specification statement at %C");
3562 /* Save the current identifier and look for more. */
3565 /* Increment the number of identifiers found for this spec stmt. */
3568 /* Make sure we have a sym or com block, and verify that it can
3569 be bind(c). Set the appropriate field(s) and look for more
3571 if (tmp_sym != NULL || com_block != NULL)
3573 if (tmp_sym != NULL)
3575 if (set_verify_bind_c_sym (tmp_sym, num_idents)
3581 if (set_verify_bind_c_com_block(com_block, num_idents)
3586 /* Look to see if we have another identifier. */
3588 if (gfc_match_eos () == MATCH_YES)
3589 found_id = MATCH_NO;
3590 else if (gfc_match_char (',') != MATCH_YES)
3591 found_id = MATCH_NO;
3592 else if (gfc_match_name (name) == MATCH_YES)
3594 found_id = MATCH_YES;
3595 gfc_get_ha_symbol (name, &tmp_sym);
3597 else if (match_common_name (name) == MATCH_YES)
3599 found_id = MATCH_YES;
3600 com_block = gfc_get_common (name, 0);
3604 gfc_error ("Missing entity or common block name for "
3605 "attribute specification statement at %C");
3611 gfc_internal_error ("Missing symbol");
3613 } while (found_id == MATCH_YES);
3615 /* if we get here we were successful */
3620 /* Try and match a BIND(C) attribute specification statement. */
3623 gfc_match_bind_c_stmt (void)
3625 match found_match = MATCH_NO;
3630 /* This may not be necessary. */
3632 /* Clear the temporary binding label holder. */
3633 curr_binding_label[0] = '\0';
3635 /* Look for the bind(c). */
3636 found_match = gfc_match_bind_c (NULL, true);
3638 if (found_match == MATCH_YES)
3640 /* Look for the :: now, but it is not required. */
3643 /* Get the identifier(s) that needs to be updated. This may need to
3644 change to hand the flag(s) for the attr specified so all identifiers
3645 found can have all appropriate parts updated (assuming that the same
3646 spec stmt can have multiple attrs, such as both bind(c) and
3648 if (get_bind_c_idents () != SUCCESS)
3649 /* Error message should have printed already. */
3657 /* Match a data declaration statement. */
3660 gfc_match_data_decl (void)
3666 num_idents_on_line = 0;
3668 m = gfc_match_type_spec (¤t_ts, 0);
3672 if (current_ts.type == BT_DERIVED && gfc_current_state () != COMP_DERIVED)
3674 sym = gfc_use_derived (current_ts.derived);
3682 current_ts.derived = sym;
3685 m = match_attr_spec ();
3686 if (m == MATCH_ERROR)
3692 if (current_ts.type == BT_DERIVED && current_ts.derived->components == NULL
3693 && !current_ts.derived->attr.zero_comp)
3696 if (current_attr.pointer && gfc_current_state () == COMP_DERIVED)
3699 gfc_find_symbol (current_ts.derived->name,
3700 current_ts.derived->ns->parent, 1, &sym);
3702 /* Any symbol that we find had better be a type definition
3703 which has its components defined. */
3704 if (sym != NULL && sym->attr.flavor == FL_DERIVED
3705 && (current_ts.derived->components != NULL
3706 || current_ts.derived->attr.zero_comp))
3709 /* Now we have an error, which we signal, and then fix up
3710 because the knock-on is plain and simple confusing. */
3711 gfc_error_now ("Derived type at %C has not been previously defined "
3712 "and so cannot appear in a derived type definition");
3713 current_attr.pointer = 1;
3718 /* If we have an old-style character declaration, and no new-style
3719 attribute specifications, then there a comma is optional between
3720 the type specification and the variable list. */
3721 if (m == MATCH_NO && current_ts.type == BT_CHARACTER && old_char_selector)
3722 gfc_match_char (',');
3724 /* Give the types/attributes to symbols that follow. Give the element
3725 a number so that repeat character length expressions can be copied. */
3729 num_idents_on_line++;
3730 m = variable_decl (elem++);
3731 if (m == MATCH_ERROR)
3736 if (gfc_match_eos () == MATCH_YES)
3738 if (gfc_match_char (',') != MATCH_YES)
3742 if (gfc_error_flag_test () == 0)
3743 gfc_error ("Syntax error in data declaration at %C");
3746 gfc_free_data_all (gfc_current_ns);
3749 gfc_free_array_spec (current_as);
3755 /* Match a prefix associated with a function or subroutine
3756 declaration. If the typespec pointer is nonnull, then a typespec
3757 can be matched. Note that if nothing matches, MATCH_YES is
3758 returned (the null string was matched). */
3761 gfc_match_prefix (gfc_typespec *ts)
3765 gfc_clear_attr (¤t_attr);
3768 gcc_assert (!gfc_matching_prefix);
3769 gfc_matching_prefix = true;
3772 if (!seen_type && ts != NULL
3773 && gfc_match_type_spec (ts, 0) == MATCH_YES
3774 && gfc_match_space () == MATCH_YES)
3781 if (gfc_match ("elemental% ") == MATCH_YES)
3783 if (gfc_add_elemental (¤t_attr, NULL) == FAILURE)
3789 if (gfc_match ("pure% ") == MATCH_YES)
3791 if (gfc_add_pure (¤t_attr, NULL) == FAILURE)
3797 if (gfc_match ("recursive% ") == MATCH_YES)
3799 if (gfc_add_recursive (¤t_attr, NULL) == FAILURE)
3805 /* At this point, the next item is not a prefix. */
3806 gcc_assert (gfc_matching_prefix);
3807 gfc_matching_prefix = false;
3811 gcc_assert (gfc_matching_prefix);
3812 gfc_matching_prefix = false;
3817 /* Copy attributes matched by gfc_match_prefix() to attributes on a symbol. */
3820 copy_prefix (symbol_attribute *dest, locus *where)
3822 if (current_attr.pure && gfc_add_pure (dest, where) == FAILURE)
3825 if (current_attr.elemental && gfc_add_elemental (dest, where) == FAILURE)
3828 if (current_attr.recursive && gfc_add_recursive (dest, where) == FAILURE)
3835 /* Match a formal argument list. */
3838 gfc_match_formal_arglist (gfc_symbol *progname, int st_flag, int null_flag)
3840 gfc_formal_arglist *head, *tail, *p, *q;
3841 char name[GFC_MAX_SYMBOL_LEN + 1];
3847 if (gfc_match_char ('(') != MATCH_YES)
3854 if (gfc_match_char (')') == MATCH_YES)
3859 if (gfc_match_char ('*') == MATCH_YES)
3863 m = gfc_match_name (name);
3867 if (gfc_get_symbol (name, NULL, &sym))
3871 p = gfc_get_formal_arglist ();
3883 /* We don't add the VARIABLE flavor because the name could be a
3884 dummy procedure. We don't apply these attributes to formal
3885 arguments of statement functions. */
3886 if (sym != NULL && !st_flag
3887 && (gfc_add_dummy (&sym->attr, sym->name, NULL) == FAILURE
3888 || gfc_missing_attr (&sym->attr, NULL) == FAILURE))
3894 /* The name of a program unit can be in a different namespace,
3895 so check for it explicitly. After the statement is accepted,
3896 the name is checked for especially in gfc_get_symbol(). */
3897 if (gfc_new_block != NULL && sym != NULL
3898 && strcmp (sym->name, gfc_new_block->name) == 0)
3900 gfc_error ("Name '%s' at %C is the name of the procedure",
3906 if (gfc_match_char (')') == MATCH_YES)
3909 m = gfc_match_char (',');
3912 gfc_error ("Unexpected junk in formal argument list at %C");
3918 /* Check for duplicate symbols in the formal argument list. */
3921 for (p = head; p->next; p = p->next)
3926 for (q = p->next; q; q = q->next)
3927 if (p->sym == q->sym)
3929 gfc_error ("Duplicate symbol '%s' in formal argument list "
3930 "at %C", p->sym->name);
3938 if (gfc_add_explicit_interface (progname, IFSRC_DECL, head, NULL)
3948 gfc_free_formal_arglist (head);
3953 /* Match a RESULT specification following a function declaration or
3954 ENTRY statement. Also matches the end-of-statement. */
3957 match_result (gfc_symbol *function, gfc_symbol **result)
3959 char name[GFC_MAX_SYMBOL_LEN + 1];
3963 if (gfc_match (" result (") != MATCH_YES)
3966 m = gfc_match_name (name);
3970 /* Get the right paren, and that's it because there could be the
3971 bind(c) attribute after the result clause. */
3972 if (gfc_match_char(')') != MATCH_YES)
3974 /* TODO: should report the missing right paren here. */
3978 if (strcmp (function->name, name) == 0)
3980 gfc_error ("RESULT variable at %C must be different than function name");
3984 if (gfc_get_symbol (name, NULL, &r))
3987 if (gfc_add_result (&r->attr, r->name, NULL) == FAILURE)
3996 /* Match a function suffix, which could be a combination of a result
3997 clause and BIND(C), either one, or neither. The draft does not
3998 require them to come in a specific order. */
4001 gfc_match_suffix (gfc_symbol *sym, gfc_symbol **result)
4003 match is_bind_c; /* Found bind(c). */
4004 match is_result; /* Found result clause. */
4005 match found_match; /* Status of whether we've found a good match. */
4006 char peek_char; /* Character we're going to peek at. */
4007 bool allow_binding_name;
4009 /* Initialize to having found nothing. */
4010 found_match = MATCH_NO;
4011 is_bind_c = MATCH_NO;
4012 is_result = MATCH_NO;
4014 /* Get the next char to narrow between result and bind(c). */
4015 gfc_gobble_whitespace ();
4016 peek_char = gfc_peek_ascii_char ();
4018 /* C binding names are not allowed for internal procedures. */
4019 if (gfc_current_state () == COMP_CONTAINS
4020 && sym->ns->proc_name->attr.flavor != FL_MODULE)
4021 allow_binding_name = false;
4023 allow_binding_name = true;
4028 /* Look for result clause. */
4029 is_result = match_result (sym, result);
4030 if (is_result == MATCH_YES)
4032 /* Now see if there is a bind(c) after it. */
4033 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
4034 /* We've found the result clause and possibly bind(c). */
4035 found_match = MATCH_YES;
4038 /* This should only be MATCH_ERROR. */
4039 found_match = is_result;
4042 /* Look for bind(c) first. */
4043 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
4044 if (is_bind_c == MATCH_YES)
4046 /* Now see if a result clause followed it. */
4047 is_result = match_result (sym, result);
4048 found_match = MATCH_YES;
4052 /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */
4053 found_match = MATCH_ERROR;
4057 gfc_error ("Unexpected junk after function declaration at %C");
4058 found_match = MATCH_ERROR;
4062 if (is_bind_c == MATCH_YES)
4064 /* Fortran 2008 draft allows BIND(C) for internal procedures. */
4065 if (gfc_current_state () == COMP_CONTAINS
4066 && sym->ns->proc_name->attr.flavor != FL_MODULE
4067 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute "
4068 "at %L may not be specified for an internal "
4069 "procedure", &gfc_current_locus)
4073 if (gfc_add_is_bind_c (&(sym->attr), sym->name, &gfc_current_locus, 1)
4082 /* Procedure pointer return value without RESULT statement:
4083 Add "hidden" result variable named "ppr@". */
4086 add_hidden_procptr_result (gfc_symbol *sym)
4090 if (gfc_notification_std (GFC_STD_F2003) == ERROR)
4093 /* First usage case: PROCEDURE and EXTERNAL statements. */
4094 case1 = gfc_current_state () == COMP_FUNCTION && gfc_current_block ()
4095 && strcmp (gfc_current_block ()->name, sym->name) == 0
4096 && sym->attr.external;
4097 /* Second usage case: INTERFACE statements. */
4098 case2 = gfc_current_state () == COMP_INTERFACE && gfc_state_stack->previous
4099 && gfc_state_stack->previous->state == COMP_FUNCTION
4100 && strcmp (gfc_state_stack->previous->sym->name, sym->name) == 0;
4106 gfc_get_sym_tree ("ppr@", gfc_current_ns, &stree);
4110 gfc_get_sym_tree ("ppr@", gfc_current_ns->parent, &stree);
4111 st2 = gfc_new_symtree (&gfc_current_ns->sym_root, "ppr@");
4112 st2->n.sym = stree->n.sym;
4114 sym->result = stree->n.sym;
4116 sym->result->attr.proc_pointer = sym->attr.proc_pointer;
4117 sym->result->attr.pointer = sym->attr.pointer;
4118 sym->result->attr.external = sym->attr.external;
4119 sym->result->attr.referenced = sym->attr.referenced;
4120 sym->attr.proc_pointer = 0;
4121 sym->attr.pointer = 0;
4122 sym->attr.external = 0;
4123 if (sym->result->attr.external && sym->result->attr.pointer)
4125 sym->result->attr.pointer = 0;
4126 sym->result->attr.proc_pointer = 1;
4129 return gfc_add_result (&sym->result->attr, sym->result->name, NULL);
4131 /* POINTER after PROCEDURE/EXTERNAL/INTERFACE statement. */
4132 else if (sym->attr.function && !sym->attr.external && sym->attr.pointer
4133 && sym->result && sym->result != sym && sym->result->attr.external
4134 && sym == gfc_current_ns->proc_name
4135 && sym == sym->result->ns->proc_name
4136 && strcmp ("ppr@", sym->result->name) == 0)
4138 sym->result->attr.proc_pointer = 1;
4139 sym->attr.pointer = 0;
4147 /* Match the interface for a PROCEDURE declaration,
4148 including brackets (R1212). */
4151 match_procedure_interface (gfc_symbol **proc_if)
4154 locus old_loc, entry_loc;
4155 old_loc = entry_loc = gfc_current_locus;
4157 gfc_clear_ts (¤t_ts);
4159 if (gfc_match (" (") != MATCH_YES)
4161 gfc_current_locus = entry_loc;
4165 /* Get the type spec. for the procedure interface. */
4166 old_loc = gfc_current_locus;
4167 m = gfc_match_type_spec (¤t_ts, 0);
4168 gfc_gobble_whitespace ();
4169 if (m == MATCH_YES || (m == MATCH_NO && gfc_peek_ascii_char () == ')'))
4172 if (m == MATCH_ERROR)
4175 gfc_current_locus = old_loc;
4177 /* Get the name of the procedure or abstract interface
4178 to inherit the interface from. */
4179 m = gfc_match_symbol (proc_if, 1);
4183 /* Various interface checks. */
4187 /* Resolve interface if possible. That way, attr.procedure is only set
4188 if it is declared by a later procedure-declaration-stmt, which is
4189 invalid per C1212. */
4190 while ((*proc_if)->ts.interface)
4191 *proc_if = (*proc_if)->ts.interface;
4193 if ((*proc_if)->generic)
4195 gfc_error ("Interface '%s' at %C may not be generic",
4199 if ((*proc_if)->attr.proc == PROC_ST_FUNCTION)
4201 gfc_error ("Interface '%s' at %C may not be a statement function",
4205 /* Handle intrinsic procedures. */
4206 if (!((*proc_if)->attr.external || (*proc_if)->attr.use_assoc
4207 || (*proc_if)->attr.if_source == IFSRC_IFBODY)
4208 && (gfc_is_intrinsic ((*proc_if), 0, gfc_current_locus)
4209 || gfc_is_intrinsic ((*proc_if), 1, gfc_current_locus)))
4210 (*proc_if)->attr.intrinsic = 1;
4211 if ((*proc_if)->attr.intrinsic
4212 && !gfc_intrinsic_actual_ok ((*proc_if)->name, 0))
4214 gfc_error ("Intrinsic procedure '%s' not allowed "
4215 "in PROCEDURE statement at %C", (*proc_if)->name);
4221 if (gfc_match (" )") != MATCH_YES)
4223 gfc_current_locus = entry_loc;
4231 /* Match a PROCEDURE declaration (R1211). */
4234 match_procedure_decl (void)
4237 gfc_symbol *sym, *proc_if = NULL;
4239 gfc_expr *initializer = NULL;
4241 /* Parse interface (with brackets). */
4242 m = match_procedure_interface (&proc_if);
4246 /* Parse attributes (with colons). */
4247 m = match_attr_spec();
4248 if (m == MATCH_ERROR)
4251 /* Get procedure symbols. */
4254 m = gfc_match_symbol (&sym, 0);
4257 else if (m == MATCH_ERROR)
4260 /* Add current_attr to the symbol attributes. */
4261 if (gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE)
4264 if (sym->attr.is_bind_c)
4266 /* Check for C1218. */
4267 if (!proc_if || !proc_if->attr.is_bind_c)
4269 gfc_error ("BIND(C) attribute at %C requires "
4270 "an interface with BIND(C)");
4273 /* Check for C1217. */
4274 if (has_name_equals && sym->attr.pointer)
4276 gfc_error ("BIND(C) procedure with NAME may not have "
4277 "POINTER attribute at %C");
4280 if (has_name_equals && sym->attr.dummy)
4282 gfc_error ("Dummy procedure at %C may not have "
4283 "BIND(C) attribute with NAME");
4286 /* Set binding label for BIND(C). */
4287 if (set_binding_label (sym->binding_label, sym->name, num) != SUCCESS)
4291 if (gfc_add_external (&sym->attr, NULL) == FAILURE)
4294 if (add_hidden_procptr_result (sym) == SUCCESS)
4297 if (gfc_add_proc (&sym->attr, sym->name, NULL) == FAILURE)
4300 /* Set interface. */
4301 if (proc_if != NULL)
4303 if (sym->ts.type != BT_UNKNOWN)
4305 gfc_error ("Procedure '%s' at %L already has basic type of %s",
4306 sym->name, &gfc_current_locus,
4307 gfc_basic_typename (sym->ts.type));
4310 sym->ts.interface = proc_if;
4311 sym->attr.untyped = 1;
4312 sym->attr.if_source = IFSRC_IFBODY;
4314 else if (current_ts.type != BT_UNKNOWN)
4316 if (gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE)
4318 sym->ts.interface = gfc_new_symbol ("", gfc_current_ns);
4319 sym->ts.interface->ts = current_ts;
4320 sym->ts.interface->attr.function = 1;
4321 sym->attr.function = sym->ts.interface->attr.function;
4322 sym->attr.if_source = IFSRC_UNKNOWN;
4325 if (gfc_match (" =>") == MATCH_YES)
4327 if (!current_attr.pointer)
4329 gfc_error ("Initialization at %C isn't for a pointer variable");
4334 m = gfc_match_null (&initializer);
4337 gfc_error ("Pointer initialization requires a NULL() at %C");
4341 if (gfc_pure (NULL))
4343 gfc_error ("Initialization of pointer at %C is not allowed in "
4344 "a PURE procedure");
4351 if (add_init_expr_to_sym (sym->name, &initializer, &gfc_current_locus)
4357 gfc_set_sym_referenced (sym);
4359 if (gfc_match_eos () == MATCH_YES)
4361 if (gfc_match_char (',') != MATCH_YES)
4366 gfc_error ("Syntax error in PROCEDURE statement at %C");
4370 /* Free stuff up and return. */
4371 gfc_free_expr (initializer);
4377 match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc);
4380 /* Match a procedure pointer component declaration (R445). */
4383 match_ppc_decl (void)
4386 gfc_symbol *proc_if = NULL;
4390 gfc_expr *initializer = NULL;
4391 gfc_typebound_proc* tb;
4392 char name[GFC_MAX_SYMBOL_LEN + 1];
4394 /* Parse interface (with brackets). */
4395 m = match_procedure_interface (&proc_if);
4399 /* Parse attributes. */
4400 tb = XCNEW (gfc_typebound_proc);
4401 tb->where = gfc_current_locus;
4402 m = match_binding_attributes (tb, false, true);
4403 if (m == MATCH_ERROR)
4406 /* TODO: Implement PASS. */
4409 gfc_error ("Procedure Pointer Component with PASS at %C "
4410 "not yet implemented");
4414 gfc_clear_attr (¤t_attr);
4415 current_attr.procedure = 1;
4416 current_attr.proc_pointer = 1;
4417 current_attr.access = tb->access;
4418 current_attr.flavor = FL_PROCEDURE;
4420 /* Match the colons (required). */
4421 if (gfc_match (" ::") != MATCH_YES)
4423 gfc_error ("Expected '::' after binding-attributes at %C");
4427 /* Check for C450. */
4428 if (!tb->nopass && proc_if == NULL)
4430 gfc_error("NOPASS or explicit interface required at %C");
4434 /* Match PPC names. */
4438 m = gfc_match_name (name);
4441 else if (m == MATCH_ERROR)
4444 if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE)
4447 /* Add current_attr to the symbol attributes. */
4448 if (gfc_copy_attr (&c->attr, ¤t_attr, NULL) == FAILURE)
4451 if (gfc_add_external (&c->attr, NULL) == FAILURE)
4454 if (gfc_add_proc (&c->attr, name, NULL) == FAILURE)
4457 /* Set interface. */
4458 if (proc_if != NULL)
4460 c->ts.interface = proc_if;
4461 c->attr.untyped = 1;
4462 c->attr.if_source = IFSRC_IFBODY;
4464 else if (ts.type != BT_UNKNOWN)
4467 c->ts.interface = gfc_new_symbol ("", gfc_current_ns);
4468 c->ts.interface->ts = ts;
4469 c->ts.interface->attr.function = 1;
4470 c->attr.function = c->ts.interface->attr.function;
4471 c->attr.if_source = IFSRC_UNKNOWN;
4474 if (gfc_match (" =>") == MATCH_YES)
4476 m = gfc_match_null (&initializer);
4479 gfc_error ("Pointer initialization requires a NULL() at %C");
4482 if (gfc_pure (NULL))
4484 gfc_error ("Initialization of pointer at %C is not allowed in "
4485 "a PURE procedure");
4490 gfc_free_expr (initializer);
4493 c->initializer = initializer;
4496 if (gfc_match_eos () == MATCH_YES)
4498 if (gfc_match_char (',') != MATCH_YES)
4503 gfc_error ("Syntax error in procedure pointer component at %C");
4508 /* Match a PROCEDURE declaration inside an interface (R1206). */
4511 match_procedure_in_interface (void)
4515 char name[GFC_MAX_SYMBOL_LEN + 1];
4517 if (current_interface.type == INTERFACE_NAMELESS
4518 || current_interface.type == INTERFACE_ABSTRACT)
4520 gfc_error ("PROCEDURE at %C must be in a generic interface");
4526 m = gfc_match_name (name);
4529 else if (m == MATCH_ERROR)
4531 if (gfc_get_symbol (name, gfc_current_ns->parent, &sym))
4534 if (gfc_add_interface (sym) == FAILURE)
4537 if (gfc_match_eos () == MATCH_YES)
4539 if (gfc_match_char (',') != MATCH_YES)
4546 gfc_error ("Syntax error in PROCEDURE statement at %C");
4551 /* General matcher for PROCEDURE declarations. */
4553 static match match_procedure_in_type (void);
4556 gfc_match_procedure (void)
4560 switch (gfc_current_state ())
4565 case COMP_SUBROUTINE:
4567 m = match_procedure_decl ();
4569 case COMP_INTERFACE:
4570 m = match_procedure_in_interface ();
4573 m = match_ppc_decl ();
4575 case COMP_DERIVED_CONTAINS:
4576 m = match_procedure_in_type ();
4585 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROCEDURE statement at %C")
4593 /* Warn if a matched procedure has the same name as an intrinsic; this is
4594 simply a wrapper around gfc_warn_intrinsic_shadow that interprets the current
4595 parser-state-stack to find out whether we're in a module. */
4598 warn_intrinsic_shadow (const gfc_symbol* sym, bool func)
4602 in_module = (gfc_state_stack->previous
4603 && gfc_state_stack->previous->state == COMP_MODULE);
4605 gfc_warn_intrinsic_shadow (sym, in_module, func);
4609 /* Match a function declaration. */
4612 gfc_match_function_decl (void)
4614 char name[GFC_MAX_SYMBOL_LEN + 1];
4615 gfc_symbol *sym, *result;
4619 match found_match; /* Status returned by match func. */
4621 if (gfc_current_state () != COMP_NONE
4622 && gfc_current_state () != COMP_INTERFACE
4623 && gfc_current_state () != COMP_CONTAINS)
4626 gfc_clear_ts (¤t_ts);
4628 old_loc = gfc_current_locus;
4630 m = gfc_match_prefix (¤t_ts);
4633 gfc_current_locus = old_loc;
4637 if (gfc_match ("function% %n", name) != MATCH_YES)
4639 gfc_current_locus = old_loc;
4642 if (get_proc_name (name, &sym, false))
4645 if (add_hidden_procptr_result (sym) == SUCCESS)
4648 gfc_new_block = sym;
4650 m = gfc_match_formal_arglist (sym, 0, 0);
4653 gfc_error ("Expected formal argument list in function "
4654 "definition at %C");
4658 else if (m == MATCH_ERROR)
4663 /* According to the draft, the bind(c) and result clause can
4664 come in either order after the formal_arg_list (i.e., either
4665 can be first, both can exist together or by themselves or neither
4666 one). Therefore, the match_result can't match the end of the
4667 string, and check for the bind(c) or result clause in either order. */
4668 found_match = gfc_match_eos ();
4670 /* Make sure that it isn't already declared as BIND(C). If it is, it
4671 must have been marked BIND(C) with a BIND(C) attribute and that is
4672 not allowed for procedures. */
4673 if (sym->attr.is_bind_c == 1)
4675 sym->attr.is_bind_c = 0;
4676 if (sym->old_symbol != NULL)
4677 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4678 "variables or common blocks",
4679 &(sym->old_symbol->declared_at));
4681 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4682 "variables or common blocks", &gfc_current_locus);
4685 if (found_match != MATCH_YES)
4687 /* If we haven't found the end-of-statement, look for a suffix. */
4688 suffix_match = gfc_match_suffix (sym, &result);
4689 if (suffix_match == MATCH_YES)
4690 /* Need to get the eos now. */
4691 found_match = gfc_match_eos ();
4693 found_match = suffix_match;
4696 if(found_match != MATCH_YES)
4700 /* Make changes to the symbol. */
4703 if (gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE)
4706 if (gfc_missing_attr (&sym->attr, NULL) == FAILURE
4707 || copy_prefix (&sym->attr, &sym->declared_at) == FAILURE)
4710 /* Delay matching the function characteristics until after the
4711 specification block by signalling kind=-1. */
4712 sym->declared_at = old_loc;
4713 if (current_ts.type != BT_UNKNOWN)
4714 current_ts.kind = -1;
4716 current_ts.kind = 0;
4720 if (current_ts.type != BT_UNKNOWN
4721 && gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE)
4727 if (current_ts.type != BT_UNKNOWN
4728 && gfc_add_type (result, ¤t_ts, &gfc_current_locus)
4731 sym->result = result;
4734 /* Warn if this procedure has the same name as an intrinsic. */
4735 warn_intrinsic_shadow (sym, true);
4741 gfc_current_locus = old_loc;
4746 /* This is mostly a copy of parse.c(add_global_procedure) but modified to
4747 pass the name of the entry, rather than the gfc_current_block name, and
4748 to return false upon finding an existing global entry. */
4751 add_global_entry (const char *name, int sub)
4754 enum gfc_symbol_type type;
4756 s = gfc_get_gsymbol(name);
4757 type = sub ? GSYM_SUBROUTINE : GSYM_FUNCTION;
4760 || (s->type != GSYM_UNKNOWN
4761 && s->type != type))
4762 gfc_global_used(s, NULL);
4766 s->where = gfc_current_locus;
4768 s->ns = gfc_current_ns;
4775 /* Match an ENTRY statement. */
4778 gfc_match_entry (void)
4783 char name[GFC_MAX_SYMBOL_LEN + 1];
4784 gfc_compile_state state;
4788 bool module_procedure;
4792 m = gfc_match_name (name);
4796 state = gfc_current_state ();
4797 if (state != COMP_SUBROUTINE && state != COMP_FUNCTION)
4802 gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM");
4805 gfc_error ("ENTRY statement at %C cannot appear within a MODULE");
4807 case COMP_BLOCK_DATA:
4808 gfc_error ("ENTRY statement at %C cannot appear within "
4811 case COMP_INTERFACE:
4812 gfc_error ("ENTRY statement at %C cannot appear within "
4816 gfc_error ("ENTRY statement at %C cannot appear within "
4817 "a DERIVED TYPE block");
4820 gfc_error ("ENTRY statement at %C cannot appear within "
4821 "an IF-THEN block");
4824 gfc_error ("ENTRY statement at %C cannot appear within "
4828 gfc_error ("ENTRY statement at %C cannot appear within "
4832 gfc_error ("ENTRY statement at %C cannot appear within "
4836 gfc_error ("ENTRY statement at %C cannot appear within "
4840 gfc_error ("ENTRY statement at %C cannot appear within "
4841 "a contained subprogram");
4844 gfc_internal_error ("gfc_match_entry(): Bad state");
4849 module_procedure = gfc_current_ns->parent != NULL
4850 && gfc_current_ns->parent->proc_name
4851 && gfc_current_ns->parent->proc_name->attr.flavor
4854 if (gfc_current_ns->parent != NULL
4855 && gfc_current_ns->parent->proc_name
4856 && !module_procedure)
4858 gfc_error("ENTRY statement at %C cannot appear in a "
4859 "contained procedure");
4863 /* Module function entries need special care in get_proc_name
4864 because previous references within the function will have
4865 created symbols attached to the current namespace. */
4866 if (get_proc_name (name, &entry,
4867 gfc_current_ns->parent != NULL
4868 && module_procedure))
4871 proc = gfc_current_block ();
4873 /* Make sure that it isn't already declared as BIND(C). If it is, it
4874 must have been marked BIND(C) with a BIND(C) attribute and that is
4875 not allowed for procedures. */
4876 if (entry->attr.is_bind_c == 1)
4878 entry->attr.is_bind_c = 0;
4879 if (entry->old_symbol != NULL)
4880 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4881 "variables or common blocks",
4882 &(entry->old_symbol->declared_at));
4884 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4885 "variables or common blocks", &gfc_current_locus);
4888 /* Check what next non-whitespace character is so we can tell if there
4889 is the required parens if we have a BIND(C). */
4890 gfc_gobble_whitespace ();
4891 peek_char = gfc_peek_ascii_char ();
4893 if (state == COMP_SUBROUTINE)
4895 /* An entry in a subroutine. */
4896 if (!gfc_current_ns->parent && !add_global_entry (name, 1))
4899 m = gfc_match_formal_arglist (entry, 0, 1);
4903 /* Call gfc_match_bind_c with allow_binding_name = true as ENTRY can
4904 never be an internal procedure. */
4905 is_bind_c = gfc_match_bind_c (entry, true);
4906 if (is_bind_c == MATCH_ERROR)
4908 if (is_bind_c == MATCH_YES)
4910 if (peek_char != '(')
4912 gfc_error ("Missing required parentheses before BIND(C) at %C");
4915 if (gfc_add_is_bind_c (&(entry->attr), entry->name, &(entry->declared_at), 1)
4920 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
4921 || gfc_add_subroutine (&entry->attr, entry->name, NULL) == FAILURE)
4926 /* An entry in a function.
4927 We need to take special care because writing
4932 ENTRY f() RESULT (r)
4934 ENTRY f RESULT (r). */
4935 if (!gfc_current_ns->parent && !add_global_entry (name, 0))
4938 old_loc = gfc_current_locus;
4939 if (gfc_match_eos () == MATCH_YES)
4941 gfc_current_locus = old_loc;
4942 /* Match the empty argument list, and add the interface to
4944 m = gfc_match_formal_arglist (entry, 0, 1);
4947 m = gfc_match_formal_arglist (entry, 0, 0);
4954 if (gfc_match_eos () == MATCH_YES)
4956 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
4957 || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE)
4960 entry->result = entry;
4964 m = gfc_match_suffix (entry, &result);
4966 gfc_syntax_error (ST_ENTRY);
4972 if (gfc_add_result (&result->attr, result->name, NULL) == FAILURE
4973 || gfc_add_entry (&entry->attr, result->name, NULL) == FAILURE
4974 || gfc_add_function (&entry->attr, result->name, NULL)
4977 entry->result = result;
4981 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
4982 || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE)
4984 entry->result = entry;
4989 if (gfc_match_eos () != MATCH_YES)
4991 gfc_syntax_error (ST_ENTRY);
4995 entry->attr.recursive = proc->attr.recursive;
4996 entry->attr.elemental = proc->attr.elemental;
4997 entry->attr.pure = proc->attr.pure;
4999 el = gfc_get_entry_list ();
5001 el->next = gfc_current_ns->entries;
5002 gfc_current_ns->entries = el;
5004 el->id = el->next->id + 1;
5008 new_st.op = EXEC_ENTRY;
5009 new_st.ext.entry = el;
5015 /* Match a subroutine statement, including optional prefixes. */
5018 gfc_match_subroutine (void)
5020 char name[GFC_MAX_SYMBOL_LEN + 1];
5025 bool allow_binding_name;
5027 if (gfc_current_state () != COMP_NONE
5028 && gfc_current_state () != COMP_INTERFACE
5029 && gfc_current_state () != COMP_CONTAINS)
5032 m = gfc_match_prefix (NULL);
5036 m = gfc_match ("subroutine% %n", name);
5040 if (get_proc_name (name, &sym, false))
5043 if (add_hidden_procptr_result (sym) == SUCCESS)
5046 gfc_new_block = sym;
5048 /* Check what next non-whitespace character is so we can tell if there
5049 is the required parens if we have a BIND(C). */
5050 gfc_gobble_whitespace ();
5051 peek_char = gfc_peek_ascii_char ();
5053 if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE)
5056 if (gfc_match_formal_arglist (sym, 0, 1) != MATCH_YES)
5059 /* Make sure that it isn't already declared as BIND(C). If it is, it
5060 must have been marked BIND(C) with a BIND(C) attribute and that is
5061 not allowed for procedures. */
5062 if (sym->attr.is_bind_c == 1)
5064 sym->attr.is_bind_c = 0;
5065 if (sym->old_symbol != NULL)
5066 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5067 "variables or common blocks",
5068 &(sym->old_symbol->declared_at));
5070 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5071 "variables or common blocks", &gfc_current_locus);
5074 /* C binding names are not allowed for internal procedures. */
5075 if (gfc_current_state () == COMP_CONTAINS
5076 && sym->ns->proc_name->attr.flavor != FL_MODULE)
5077 allow_binding_name = false;
5079 allow_binding_name = true;
5081 /* Here, we are just checking if it has the bind(c) attribute, and if
5082 so, then we need to make sure it's all correct. If it doesn't,
5083 we still need to continue matching the rest of the subroutine line. */
5084 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
5085 if (is_bind_c == MATCH_ERROR)
5087 /* There was an attempt at the bind(c), but it was wrong. An
5088 error message should have been printed w/in the gfc_match_bind_c
5089 so here we'll just return the MATCH_ERROR. */
5093 if (is_bind_c == MATCH_YES)
5095 /* The following is allowed in the Fortran 2008 draft. */
5096 if (gfc_current_state () == COMP_CONTAINS
5097 && sym->ns->proc_name->attr.flavor != FL_MODULE
5098 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute "
5099 "at %L may not be specified for an internal "
5100 "procedure", &gfc_current_locus)
5104 if (peek_char != '(')
5106 gfc_error ("Missing required parentheses before BIND(C) at %C");
5109 if (gfc_add_is_bind_c (&(sym->attr), sym->name, &(sym->declared_at), 1)
5114 if (gfc_match_eos () != MATCH_YES)
5116 gfc_syntax_error (ST_SUBROUTINE);
5120 if (copy_prefix (&sym->attr, &sym->declared_at) == FAILURE)
5123 /* Warn if it has the same name as an intrinsic. */
5124 warn_intrinsic_shadow (sym, false);
5130 /* Match a BIND(C) specifier, with the optional 'name=' specifier if
5131 given, and set the binding label in either the given symbol (if not
5132 NULL), or in the current_ts. The symbol may be NULL because we may
5133 encounter the BIND(C) before the declaration itself. Return
5134 MATCH_NO if what we're looking at isn't a BIND(C) specifier,
5135 MATCH_ERROR if it is a BIND(C) clause but an error was encountered,
5136 or MATCH_YES if the specifier was correct and the binding label and
5137 bind(c) fields were set correctly for the given symbol or the
5138 current_ts. If allow_binding_name is false, no binding name may be
5142 gfc_match_bind_c (gfc_symbol *sym, bool allow_binding_name)
5144 /* binding label, if exists */
5145 char binding_label[GFC_MAX_SYMBOL_LEN + 1];
5149 /* Initialize the flag that specifies whether we encountered a NAME=
5150 specifier or not. */
5151 has_name_equals = 0;
5153 /* Init the first char to nil so we can catch if we don't have
5154 the label (name attr) or the symbol name yet. */
5155 binding_label[0] = '\0';
5157 /* This much we have to be able to match, in this order, if
5158 there is a bind(c) label. */
5159 if (gfc_match (" bind ( c ") != MATCH_YES)
5162 /* Now see if there is a binding label, or if we've reached the
5163 end of the bind(c) attribute without one. */
5164 if (gfc_match_char (',') == MATCH_YES)
5166 if (gfc_match (" name = ") != MATCH_YES)
5168 gfc_error ("Syntax error in NAME= specifier for binding label "
5170 /* should give an error message here */
5174 has_name_equals = 1;
5176 /* Get the opening quote. */
5177 double_quote = MATCH_YES;
5178 single_quote = MATCH_YES;
5179 double_quote = gfc_match_char ('"');
5180 if (double_quote != MATCH_YES)
5181 single_quote = gfc_match_char ('\'');
5182 if (double_quote != MATCH_YES && single_quote != MATCH_YES)
5184 gfc_error ("Syntax error in NAME= specifier for binding label "
5189 /* Grab the binding label, using functions that will not lower
5190 case the names automatically. */
5191 if (gfc_match_name_C (binding_label) != MATCH_YES)
5194 /* Get the closing quotation. */
5195 if (double_quote == MATCH_YES)
5197 if (gfc_match_char ('"') != MATCH_YES)
5199 gfc_error ("Missing closing quote '\"' for binding label at %C");
5200 /* User started string with '"' so looked to match it. */
5206 if (gfc_match_char ('\'') != MATCH_YES)
5208 gfc_error ("Missing closing quote '\'' for binding label at %C");
5209 /* User started string with "'" char. */
5215 /* Get the required right paren. */
5216 if (gfc_match_char (')') != MATCH_YES)
5218 gfc_error ("Missing closing paren for binding label at %C");
5222 if (has_name_equals && !allow_binding_name)
5224 gfc_error ("No binding name is allowed in BIND(C) at %C");
5228 if (has_name_equals && sym != NULL && sym->attr.dummy)
5230 gfc_error ("For dummy procedure %s, no binding name is "
5231 "allowed in BIND(C) at %C", sym->name);
5236 /* Save the binding label to the symbol. If sym is null, we're
5237 probably matching the typespec attributes of a declaration and
5238 haven't gotten the name yet, and therefore, no symbol yet. */
5239 if (binding_label[0] != '\0')
5243 strcpy (sym->binding_label, binding_label);
5246 strcpy (curr_binding_label, binding_label);
5248 else if (allow_binding_name)
5250 /* No binding label, but if symbol isn't null, we
5251 can set the label for it here.
5252 If name="" or allow_binding_name is false, no C binding name is
5254 if (sym != NULL && sym->name != NULL && has_name_equals == 0)
5255 strncpy (sym->binding_label, sym->name, strlen (sym->name) + 1);
5258 if (has_name_equals && gfc_current_state () == COMP_INTERFACE
5259 && current_interface.type == INTERFACE_ABSTRACT)
5261 gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C");
5269 /* Return nonzero if we're currently compiling a contained procedure. */
5272 contained_procedure (void)
5274 gfc_state_data *s = gfc_state_stack;
5276 if ((s->state == COMP_SUBROUTINE || s->state == COMP_FUNCTION)
5277 && s->previous != NULL && s->previous->state == COMP_CONTAINS)
5283 /* Set the kind of each enumerator. The kind is selected such that it is
5284 interoperable with the corresponding C enumeration type, making
5285 sure that -fshort-enums is honored. */
5290 enumerator_history *current_history = NULL;
5294 if (max_enum == NULL || enum_history == NULL)
5297 if (!flag_short_enums)
5303 kind = gfc_integer_kinds[i++].kind;
5305 while (kind < gfc_c_int_kind
5306 && gfc_check_integer_range (max_enum->initializer->value.integer,
5309 current_history = enum_history;
5310 while (current_history != NULL)
5312 current_history->sym->ts.kind = kind;
5313 current_history = current_history->next;
5318 /* Match any of the various end-block statements. Returns the type of
5319 END to the caller. The END INTERFACE, END IF, END DO and END
5320 SELECT statements cannot be replaced by a single END statement. */
5323 gfc_match_end (gfc_statement *st)
5325 char name[GFC_MAX_SYMBOL_LEN + 1];
5326 gfc_compile_state state;
5328 const char *block_name;
5333 old_loc = gfc_current_locus;
5334 if (gfc_match ("end") != MATCH_YES)
5337 state = gfc_current_state ();
5338 block_name = gfc_current_block () == NULL
5339 ? NULL : gfc_current_block ()->name;
5341 if (state == COMP_CONTAINS || state == COMP_DERIVED_CONTAINS)
5343 state = gfc_state_stack->previous->state;
5344 block_name = gfc_state_stack->previous->sym == NULL
5345 ? NULL : gfc_state_stack->previous->sym->name;
5352 *st = ST_END_PROGRAM;
5353 target = " program";
5357 case COMP_SUBROUTINE:
5358 *st = ST_END_SUBROUTINE;
5359 target = " subroutine";
5360 eos_ok = !contained_procedure ();
5364 *st = ST_END_FUNCTION;
5365 target = " function";
5366 eos_ok = !contained_procedure ();
5369 case COMP_BLOCK_DATA:
5370 *st = ST_END_BLOCK_DATA;
5371 target = " block data";
5376 *st = ST_END_MODULE;
5381 case COMP_INTERFACE:
5382 *st = ST_END_INTERFACE;
5383 target = " interface";
5388 case COMP_DERIVED_CONTAINS:
5407 *st = ST_END_SELECT;
5413 *st = ST_END_FORALL;
5428 last_initializer = NULL;
5430 gfc_free_enum_history ();
5434 gfc_error ("Unexpected END statement at %C");
5438 if (gfc_match_eos () == MATCH_YES)
5442 /* We would have required END [something]. */
5443 gfc_error ("%s statement expected at %L",
5444 gfc_ascii_statement (*st), &old_loc);
5451 /* Verify that we've got the sort of end-block that we're expecting. */
5452 if (gfc_match (target) != MATCH_YES)
5454 gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st));
5458 /* If we're at the end, make sure a block name wasn't required. */
5459 if (gfc_match_eos () == MATCH_YES)
5462 if (*st != ST_ENDDO && *st != ST_ENDIF && *st != ST_END_SELECT
5463 && *st != ST_END_FORALL && *st != ST_END_WHERE)
5466 if (gfc_current_block () == NULL)
5469 gfc_error ("Expected block name of '%s' in %s statement at %C",
5470 block_name, gfc_ascii_statement (*st));
5475 /* END INTERFACE has a special handler for its several possible endings. */
5476 if (*st == ST_END_INTERFACE)
5477 return gfc_match_end_interface ();
5479 /* We haven't hit the end of statement, so what is left must be an
5481 m = gfc_match_space ();
5483 m = gfc_match_name (name);
5486 gfc_error ("Expected terminating name at %C");
5490 if (block_name == NULL)
5493 if (strcmp (name, block_name) != 0 && strcmp (block_name, "ppr@") != 0)
5495 gfc_error ("Expected label '%s' for %s statement at %C", block_name,
5496 gfc_ascii_statement (*st));
5499 /* Procedure pointer as function result. */
5500 else if (strcmp (block_name, "ppr@") == 0
5501 && strcmp (name, gfc_current_block ()->ns->proc_name->name) != 0)
5503 gfc_error ("Expected label '%s' for %s statement at %C",
5504 gfc_current_block ()->ns->proc_name->name,
5505 gfc_ascii_statement (*st));
5509 if (gfc_match_eos () == MATCH_YES)
5513 gfc_syntax_error (*st);
5516 gfc_current_locus = old_loc;
5522 /***************** Attribute declaration statements ****************/
5524 /* Set the attribute of a single variable. */
5529 char name[GFC_MAX_SYMBOL_LEN + 1];
5537 m = gfc_match_name (name);
5541 if (find_special (name, &sym))
5544 var_locus = gfc_current_locus;
5546 /* Deal with possible array specification for certain attributes. */
5547 if (current_attr.dimension
5548 || current_attr.allocatable
5549 || current_attr.pointer
5550 || current_attr.target)
5552 m = gfc_match_array_spec (&as);
5553 if (m == MATCH_ERROR)
5556 if (current_attr.dimension && m == MATCH_NO)
5558 gfc_error ("Missing array specification at %L in DIMENSION "
5559 "statement", &var_locus);
5564 if (current_attr.dimension && sym->value)
5566 gfc_error ("Dimensions specified for %s at %L after its "
5567 "initialisation", sym->name, &var_locus);
5572 if ((current_attr.allocatable || current_attr.pointer)
5573 && (m == MATCH_YES) && (as->type != AS_DEFERRED))
5575 gfc_error ("Array specification must be deferred at %L", &var_locus);
5581 /* Update symbol table. DIMENSION attribute is set
5582 in gfc_set_array_spec(). */
5583 if (current_attr.dimension == 0
5584 && gfc_copy_attr (&sym->attr, ¤t_attr, &var_locus) == FAILURE)
5590 if (gfc_set_array_spec (sym, as, &var_locus) == FAILURE)
5596 if (sym->attr.cray_pointee && sym->as != NULL)
5598 /* Fix the array spec. */
5599 m = gfc_mod_pointee_as (sym->as);
5600 if (m == MATCH_ERROR)
5604 if (gfc_add_attribute (&sym->attr, &var_locus) == FAILURE)
5610 if ((current_attr.external || current_attr.intrinsic)
5611 && sym->attr.flavor != FL_PROCEDURE
5612 && gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL) == FAILURE)
5618 add_hidden_procptr_result (sym);
5623 gfc_free_array_spec (as);
5628 /* Generic attribute declaration subroutine. Used for attributes that
5629 just have a list of names. */
5636 /* Gobble the optional double colon, by simply ignoring the result
5646 if (gfc_match_eos () == MATCH_YES)
5652 if (gfc_match_char (',') != MATCH_YES)
5654 gfc_error ("Unexpected character in variable list at %C");
5664 /* This routine matches Cray Pointer declarations of the form:
5665 pointer ( <pointer>, <pointee> )
5667 pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ...
5668 The pointer, if already declared, should be an integer. Otherwise, we
5669 set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may
5670 be either a scalar, or an array declaration. No space is allocated for
5671 the pointee. For the statement
5672 pointer (ipt, ar(10))
5673 any subsequent uses of ar will be translated (in C-notation) as
5674 ar(i) => ((<type> *) ipt)(i)
5675 After gimplification, pointee variable will disappear in the code. */
5678 cray_pointer_decl (void)
5682 gfc_symbol *cptr; /* Pointer symbol. */
5683 gfc_symbol *cpte; /* Pointee symbol. */
5689 if (gfc_match_char ('(') != MATCH_YES)
5691 gfc_error ("Expected '(' at %C");
5695 /* Match pointer. */
5696 var_locus = gfc_current_locus;
5697 gfc_clear_attr (¤t_attr);
5698 gfc_add_cray_pointer (¤t_attr, &var_locus);
5699 current_ts.type = BT_INTEGER;
5700 current_ts.kind = gfc_index_integer_kind;
5702 m = gfc_match_symbol (&cptr, 0);
5705 gfc_error ("Expected variable name at %C");
5709 if (gfc_add_cray_pointer (&cptr->attr, &var_locus) == FAILURE)
5712 gfc_set_sym_referenced (cptr);
5714 if (cptr->ts.type == BT_UNKNOWN) /* Override the type, if necessary. */
5716 cptr->ts.type = BT_INTEGER;
5717 cptr->ts.kind = gfc_index_integer_kind;
5719 else if (cptr->ts.type != BT_INTEGER)
5721 gfc_error ("Cray pointer at %C must be an integer");
5724 else if (cptr->ts.kind < gfc_index_integer_kind)
5725 gfc_warning ("Cray pointer at %C has %d bytes of precision;"
5726 " memory addresses require %d bytes",
5727 cptr->ts.kind, gfc_index_integer_kind);
5729 if (gfc_match_char (',') != MATCH_YES)
5731 gfc_error ("Expected \",\" at %C");
5735 /* Match Pointee. */
5736 var_locus = gfc_current_locus;
5737 gfc_clear_attr (¤t_attr);
5738 gfc_add_cray_pointee (¤t_attr, &var_locus);
5739 current_ts.type = BT_UNKNOWN;
5740 current_ts.kind = 0;
5742 m = gfc_match_symbol (&cpte, 0);
5745 gfc_error ("Expected variable name at %C");
5749 /* Check for an optional array spec. */
5750 m = gfc_match_array_spec (&as);
5751 if (m == MATCH_ERROR)
5753 gfc_free_array_spec (as);
5756 else if (m == MATCH_NO)
5758 gfc_free_array_spec (as);
5762 if (gfc_add_cray_pointee (&cpte->attr, &var_locus) == FAILURE)
5765 gfc_set_sym_referenced (cpte);
5767 if (cpte->as == NULL)
5769 if (gfc_set_array_spec (cpte, as, &var_locus) == FAILURE)
5770 gfc_internal_error ("Couldn't set Cray pointee array spec.");
5772 else if (as != NULL)
5774 gfc_error ("Duplicate array spec for Cray pointee at %C");
5775 gfc_free_array_spec (as);
5781 if (cpte->as != NULL)
5783 /* Fix array spec. */
5784 m = gfc_mod_pointee_as (cpte->as);
5785 if (m == MATCH_ERROR)
5789 /* Point the Pointee at the Pointer. */
5790 cpte->cp_pointer = cptr;
5792 if (gfc_match_char (')') != MATCH_YES)
5794 gfc_error ("Expected \")\" at %C");
5797 m = gfc_match_char (',');
5799 done = true; /* Stop searching for more declarations. */
5803 if (m == MATCH_ERROR /* Failed when trying to find ',' above. */
5804 || gfc_match_eos () != MATCH_YES)
5806 gfc_error ("Expected \",\" or end of statement at %C");
5814 gfc_match_external (void)
5817 gfc_clear_attr (¤t_attr);
5818 current_attr.external = 1;
5820 return attr_decl ();
5825 gfc_match_intent (void)
5829 intent = match_intent_spec ();
5830 if (intent == INTENT_UNKNOWN)
5833 gfc_clear_attr (¤t_attr);
5834 current_attr.intent = intent;
5836 return attr_decl ();
5841 gfc_match_intrinsic (void)
5844 gfc_clear_attr (¤t_attr);
5845 current_attr.intrinsic = 1;
5847 return attr_decl ();
5852 gfc_match_optional (void)
5855 gfc_clear_attr (¤t_attr);
5856 current_attr.optional = 1;
5858 return attr_decl ();
5863 gfc_match_pointer (void)
5865 gfc_gobble_whitespace ();
5866 if (gfc_peek_ascii_char () == '(')
5868 if (!gfc_option.flag_cray_pointer)
5870 gfc_error ("Cray pointer declaration at %C requires -fcray-pointer "
5874 return cray_pointer_decl ();
5878 gfc_clear_attr (¤t_attr);
5879 current_attr.pointer = 1;
5881 return attr_decl ();
5887 gfc_match_allocatable (void)
5889 gfc_clear_attr (¤t_attr);
5890 current_attr.allocatable = 1;
5892 return attr_decl ();
5897 gfc_match_dimension (void)
5899 gfc_clear_attr (¤t_attr);
5900 current_attr.dimension = 1;
5902 return attr_decl ();
5907 gfc_match_target (void)
5909 gfc_clear_attr (¤t_attr);
5910 current_attr.target = 1;
5912 return attr_decl ();
5916 /* Match the list of entities being specified in a PUBLIC or PRIVATE
5920 access_attr_decl (gfc_statement st)
5922 char name[GFC_MAX_SYMBOL_LEN + 1];
5923 interface_type type;
5926 gfc_intrinsic_op op;
5929 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
5934 m = gfc_match_generic_spec (&type, name, &op);
5937 if (m == MATCH_ERROR)
5942 case INTERFACE_NAMELESS:
5943 case INTERFACE_ABSTRACT:
5946 case INTERFACE_GENERIC:
5947 if (gfc_get_symbol (name, NULL, &sym))
5950 if (gfc_add_access (&sym->attr, (st == ST_PUBLIC)
5951 ? ACCESS_PUBLIC : ACCESS_PRIVATE,
5952 sym->name, NULL) == FAILURE)
5957 case INTERFACE_INTRINSIC_OP:
5958 if (gfc_current_ns->operator_access[op] == ACCESS_UNKNOWN)
5960 gfc_current_ns->operator_access[op] =
5961 (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE;
5965 gfc_error ("Access specification of the %s operator at %C has "
5966 "already been specified", gfc_op2string (op));
5972 case INTERFACE_USER_OP:
5973 uop = gfc_get_uop (name);
5975 if (uop->access == ACCESS_UNKNOWN)
5977 uop->access = (st == ST_PUBLIC)
5978 ? ACCESS_PUBLIC : ACCESS_PRIVATE;
5982 gfc_error ("Access specification of the .%s. operator at %C "
5983 "has already been specified", sym->name);
5990 if (gfc_match_char (',') == MATCH_NO)
5994 if (gfc_match_eos () != MATCH_YES)
5999 gfc_syntax_error (st);
6007 gfc_match_protected (void)
6012 if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE)
6014 gfc_error ("PROTECTED at %C only allowed in specification "
6015 "part of a module");
6020 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED statement at %C")
6024 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6029 if (gfc_match_eos () == MATCH_YES)
6034 m = gfc_match_symbol (&sym, 0);
6038 if (gfc_add_protected (&sym->attr, sym->name, &gfc_current_locus)
6051 if (gfc_match_eos () == MATCH_YES)
6053 if (gfc_match_char (',') != MATCH_YES)
6060 gfc_error ("Syntax error in PROTECTED statement at %C");
6065 /* The PRIVATE statement is a bit weird in that it can be an attribute
6066 declaration, but also works as a standalone statement inside of a
6067 type declaration or a module. */
6070 gfc_match_private (gfc_statement *st)
6073 if (gfc_match ("private") != MATCH_YES)
6076 if (gfc_current_state () != COMP_MODULE
6077 && !(gfc_current_state () == COMP_DERIVED
6078 && gfc_state_stack->previous
6079 && gfc_state_stack->previous->state == COMP_MODULE)
6080 && !(gfc_current_state () == COMP_DERIVED_CONTAINS
6081 && gfc_state_stack->previous && gfc_state_stack->previous->previous
6082 && gfc_state_stack->previous->previous->state == COMP_MODULE))
6084 gfc_error ("PRIVATE statement at %C is only allowed in the "
6085 "specification part of a module");
6089 if (gfc_current_state () == COMP_DERIVED)
6091 if (gfc_match_eos () == MATCH_YES)
6097 gfc_syntax_error (ST_PRIVATE);
6101 if (gfc_match_eos () == MATCH_YES)
6108 return access_attr_decl (ST_PRIVATE);
6113 gfc_match_public (gfc_statement *st)
6116 if (gfc_match ("public") != MATCH_YES)
6119 if (gfc_current_state () != COMP_MODULE)
6121 gfc_error ("PUBLIC statement at %C is only allowed in the "
6122 "specification part of a module");
6126 if (gfc_match_eos () == MATCH_YES)
6133 return access_attr_decl (ST_PUBLIC);
6137 /* Workhorse for gfc_match_parameter. */
6146 m = gfc_match_symbol (&sym, 0);
6148 gfc_error ("Expected variable name at %C in PARAMETER statement");
6153 if (gfc_match_char ('=') == MATCH_NO)
6155 gfc_error ("Expected = sign in PARAMETER statement at %C");
6159 m = gfc_match_init_expr (&init);
6161 gfc_error ("Expected expression at %C in PARAMETER statement");
6165 if (sym->ts.type == BT_UNKNOWN
6166 && gfc_set_default_type (sym, 1, NULL) == FAILURE)
6172 if (gfc_check_assign_symbol (sym, init) == FAILURE
6173 || gfc_add_flavor (&sym->attr, FL_PARAMETER, sym->name, NULL) == FAILURE)
6181 gfc_error ("Initializing already initialized variable at %C");
6186 if (sym->ts.type == BT_CHARACTER
6187 && sym->ts.cl != NULL
6188 && sym->ts.cl->length != NULL
6189 && sym->ts.cl->length->expr_type == EXPR_CONSTANT
6190 && init->expr_type == EXPR_CONSTANT
6191 && init->ts.type == BT_CHARACTER)
6192 gfc_set_constant_character_len (
6193 mpz_get_si (sym->ts.cl->length->value.integer), init, -1);
6194 else if (sym->ts.type == BT_CHARACTER && sym->ts.cl != NULL
6195 && sym->ts.cl->length == NULL)
6198 if (init->expr_type == EXPR_CONSTANT)
6200 clen = init->value.character.length;
6201 sym->ts.cl->length = gfc_int_expr (clen);
6203 else if (init->expr_type == EXPR_ARRAY)
6205 gfc_expr *p = init->value.constructor->expr;
6206 clen = p->value.character.length;
6207 sym->ts.cl->length = gfc_int_expr (clen);
6209 else if (init->ts.cl && init->ts.cl->length)
6210 sym->ts.cl->length = gfc_copy_expr (sym->value->ts.cl->length);
6217 gfc_free_expr (init);
6222 /* Match a parameter statement, with the weird syntax that these have. */
6225 gfc_match_parameter (void)
6229 if (gfc_match_char ('(') == MATCH_NO)
6238 if (gfc_match (" )%t") == MATCH_YES)
6241 if (gfc_match_char (',') != MATCH_YES)
6243 gfc_error ("Unexpected characters in PARAMETER statement at %C");
6253 /* Save statements have a special syntax. */
6256 gfc_match_save (void)
6258 char n[GFC_MAX_SYMBOL_LEN+1];
6263 if (gfc_match_eos () == MATCH_YES)
6265 if (gfc_current_ns->seen_save)
6267 if (gfc_notify_std (GFC_STD_LEGACY, "Blanket SAVE statement at %C "
6268 "follows previous SAVE statement")
6273 gfc_current_ns->save_all = gfc_current_ns->seen_save = 1;
6277 if (gfc_current_ns->save_all)
6279 if (gfc_notify_std (GFC_STD_LEGACY, "SAVE statement at %C follows "
6280 "blanket SAVE statement")
6289 m = gfc_match_symbol (&sym, 0);
6293 if (gfc_add_save (&sym->attr, sym->name, &gfc_current_locus)
6305 m = gfc_match (" / %n /", &n);
6306 if (m == MATCH_ERROR)
6311 c = gfc_get_common (n, 0);
6314 gfc_current_ns->seen_save = 1;
6317 if (gfc_match_eos () == MATCH_YES)
6319 if (gfc_match_char (',') != MATCH_YES)
6326 gfc_error ("Syntax error in SAVE statement at %C");
6332 gfc_match_value (void)
6337 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE statement at %C")
6341 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6346 if (gfc_match_eos () == MATCH_YES)
6351 m = gfc_match_symbol (&sym, 0);
6355 if (gfc_add_value (&sym->attr, sym->name, &gfc_current_locus)
6368 if (gfc_match_eos () == MATCH_YES)
6370 if (gfc_match_char (',') != MATCH_YES)
6377 gfc_error ("Syntax error in VALUE statement at %C");
6383 gfc_match_volatile (void)
6388 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VOLATILE statement at %C")
6392 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6397 if (gfc_match_eos () == MATCH_YES)
6402 /* VOLATILE is special because it can be added to host-associated
6404 m = gfc_match_symbol (&sym, 1);
6408 if (gfc_add_volatile (&sym->attr, sym->name, &gfc_current_locus)
6421 if (gfc_match_eos () == MATCH_YES)
6423 if (gfc_match_char (',') != MATCH_YES)
6430 gfc_error ("Syntax error in VOLATILE statement at %C");
6435 /* Match a module procedure statement. Note that we have to modify
6436 symbols in the parent's namespace because the current one was there
6437 to receive symbols that are in an interface's formal argument list. */
6440 gfc_match_modproc (void)
6442 char name[GFC_MAX_SYMBOL_LEN + 1];
6445 gfc_namespace *module_ns;
6446 gfc_interface *old_interface_head, *interface;
6448 if (gfc_state_stack->state != COMP_INTERFACE
6449 || gfc_state_stack->previous == NULL
6450 || current_interface.type == INTERFACE_NAMELESS
6451 || current_interface.type == INTERFACE_ABSTRACT)
6453 gfc_error ("MODULE PROCEDURE at %C must be in a generic module "
6458 module_ns = gfc_current_ns->parent;
6459 for (; module_ns; module_ns = module_ns->parent)
6460 if (module_ns->proc_name->attr.flavor == FL_MODULE)
6463 if (module_ns == NULL)
6466 /* Store the current state of the interface. We will need it if we
6467 end up with a syntax error and need to recover. */
6468 old_interface_head = gfc_current_interface_head ();
6474 m = gfc_match_name (name);
6480 /* Check for syntax error before starting to add symbols to the
6481 current namespace. */
6482 if (gfc_match_eos () == MATCH_YES)
6484 if (!last && gfc_match_char (',') != MATCH_YES)
6487 /* Now we're sure the syntax is valid, we process this item
6489 if (gfc_get_symbol (name, module_ns, &sym))
6492 if (sym->attr.proc != PROC_MODULE
6493 && gfc_add_procedure (&sym->attr, PROC_MODULE,
6494 sym->name, NULL) == FAILURE)
6497 if (gfc_add_interface (sym) == FAILURE)
6500 sym->attr.mod_proc = 1;
6509 /* Restore the previous state of the interface. */
6510 interface = gfc_current_interface_head ();
6511 gfc_set_current_interface_head (old_interface_head);
6513 /* Free the new interfaces. */
6514 while (interface != old_interface_head)
6516 gfc_interface *i = interface->next;
6517 gfc_free (interface);
6521 /* And issue a syntax error. */
6522 gfc_syntax_error (ST_MODULE_PROC);
6527 /* Check a derived type that is being extended. */
6529 check_extended_derived_type (char *name)
6531 gfc_symbol *extended;
6533 if (gfc_find_symbol (name, gfc_current_ns, 1, &extended))
6535 gfc_error ("Ambiguous symbol in TYPE definition at %C");
6541 gfc_error ("No such symbol in TYPE definition at %C");
6545 if (extended->attr.flavor != FL_DERIVED)
6547 gfc_error ("'%s' in EXTENDS expression at %C is not a "
6548 "derived type", name);
6552 if (extended->attr.is_bind_c)
6554 gfc_error ("'%s' cannot be extended at %C because it "
6555 "is BIND(C)", extended->name);
6559 if (extended->attr.sequence)
6561 gfc_error ("'%s' cannot be extended at %C because it "
6562 "is a SEQUENCE type", extended->name);
6570 /* Match the optional attribute specifiers for a type declaration.
6571 Return MATCH_ERROR if an error is encountered in one of the handled
6572 attributes (public, private, bind(c)), MATCH_NO if what's found is
6573 not a handled attribute, and MATCH_YES otherwise. TODO: More error
6574 checking on attribute conflicts needs to be done. */
6577 gfc_get_type_attr_spec (symbol_attribute *attr, char *name)
6579 /* See if the derived type is marked as private. */
6580 if (gfc_match (" , private") == MATCH_YES)
6582 if (gfc_current_state () != COMP_MODULE)
6584 gfc_error ("Derived type at %C can only be PRIVATE in the "
6585 "specification part of a module");
6589 if (gfc_add_access (attr, ACCESS_PRIVATE, NULL, NULL) == FAILURE)
6592 else if (gfc_match (" , public") == MATCH_YES)
6594 if (gfc_current_state () != COMP_MODULE)
6596 gfc_error ("Derived type at %C can only be PUBLIC in the "
6597 "specification part of a module");
6601 if (gfc_add_access (attr, ACCESS_PUBLIC, NULL, NULL) == FAILURE)
6604 else if (gfc_match (" , bind ( c )") == MATCH_YES)
6606 /* If the type is defined to be bind(c) it then needs to make
6607 sure that all fields are interoperable. This will
6608 need to be a semantic check on the finished derived type.
6609 See 15.2.3 (lines 9-12) of F2003 draft. */
6610 if (gfc_add_is_bind_c (attr, NULL, &gfc_current_locus, 0) != SUCCESS)
6613 /* TODO: attr conflicts need to be checked, probably in symbol.c. */
6615 else if (gfc_match (" , abstract") == MATCH_YES)
6617 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ABSTRACT type at %C")
6621 if (gfc_add_abstract (attr, &gfc_current_locus) == FAILURE)
6624 else if (name && gfc_match(" , extends ( %n )", name) == MATCH_YES)
6626 if (gfc_add_extension (attr, &gfc_current_locus) == FAILURE)
6632 /* If we get here, something matched. */
6637 /* Match the beginning of a derived type declaration. If a type name
6638 was the result of a function, then it is possible to have a symbol
6639 already to be known as a derived type yet have no components. */
6642 gfc_match_derived_decl (void)
6644 char name[GFC_MAX_SYMBOL_LEN + 1];
6645 char parent[GFC_MAX_SYMBOL_LEN + 1];
6646 symbol_attribute attr;
6648 gfc_symbol *extended;
6650 match is_type_attr_spec = MATCH_NO;
6651 bool seen_attr = false;
6653 if (gfc_current_state () == COMP_DERIVED)
6658 gfc_clear_attr (&attr);
6663 is_type_attr_spec = gfc_get_type_attr_spec (&attr, parent);
6664 if (is_type_attr_spec == MATCH_ERROR)
6666 if (is_type_attr_spec == MATCH_YES)
6668 } while (is_type_attr_spec == MATCH_YES);
6670 /* Deal with derived type extensions. The extension attribute has
6671 been added to 'attr' but now the parent type must be found and
6674 extended = check_extended_derived_type (parent);
6676 if (parent[0] && !extended)
6679 if (gfc_match (" ::") != MATCH_YES && seen_attr)
6681 gfc_error ("Expected :: in TYPE definition at %C");
6685 m = gfc_match (" %n%t", name);
6689 /* Make sure the name is not the name of an intrinsic type. */
6690 if (gfc_is_intrinsic_typename (name))
6692 gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic "
6697 if (gfc_get_symbol (name, NULL, &sym))
6700 if (sym->ts.type != BT_UNKNOWN)
6702 gfc_error ("Derived type name '%s' at %C already has a basic type "
6703 "of %s", sym->name, gfc_typename (&sym->ts));
6707 /* The symbol may already have the derived attribute without the
6708 components. The ways this can happen is via a function
6709 definition, an INTRINSIC statement or a subtype in another
6710 derived type that is a pointer. The first part of the AND clause
6711 is true if the symbol is not the return value of a function. */
6712 if (sym->attr.flavor != FL_DERIVED
6713 && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE)
6716 if (sym->components != NULL || sym->attr.zero_comp)
6718 gfc_error ("Derived type definition of '%s' at %C has already been "
6719 "defined", sym->name);
6723 if (attr.access != ACCESS_UNKNOWN
6724 && gfc_add_access (&sym->attr, attr.access, sym->name, NULL) == FAILURE)
6727 /* See if the derived type was labeled as bind(c). */
6728 if (attr.is_bind_c != 0)
6729 sym->attr.is_bind_c = attr.is_bind_c;
6731 /* Construct the f2k_derived namespace if it is not yet there. */
6732 if (!sym->f2k_derived)
6733 sym->f2k_derived = gfc_get_namespace (NULL, 0);
6735 if (extended && !sym->components)
6740 /* Add the extended derived type as the first component. */
6741 gfc_add_component (sym, parent, &p);
6742 sym->attr.extension = attr.extension;
6744 gfc_set_sym_referenced (extended);
6746 p->ts.type = BT_DERIVED;
6747 p->ts.derived = extended;
6748 p->initializer = gfc_default_initializer (&p->ts);
6750 /* Provide the links between the extended type and its extension. */
6751 if (!extended->f2k_derived)
6752 extended->f2k_derived = gfc_get_namespace (NULL, 0);
6753 st = gfc_new_symtree (&extended->f2k_derived->sym_root, sym->name);
6757 /* Take over the ABSTRACT attribute. */
6758 sym->attr.abstract = attr.abstract;
6760 gfc_new_block = sym;
6766 /* Cray Pointees can be declared as:
6767 pointer (ipt, a (n,m,...,*))
6768 By default, this is treated as an AS_ASSUMED_SIZE array. We'll
6769 cheat and set a constant bound of 1 for the last dimension, if this
6770 is the case. Since there is no bounds-checking for Cray Pointees,
6771 this will be okay. */
6774 gfc_mod_pointee_as (gfc_array_spec *as)
6776 as->cray_pointee = true; /* This will be useful to know later. */
6777 if (as->type == AS_ASSUMED_SIZE)
6779 as->type = AS_EXPLICIT;
6780 as->upper[as->rank - 1] = gfc_int_expr (1);
6781 as->cp_was_assumed = true;
6783 else if (as->type == AS_ASSUMED_SHAPE)
6785 gfc_error ("Cray Pointee at %C cannot be assumed shape array");
6792 /* Match the enum definition statement, here we are trying to match
6793 the first line of enum definition statement.
6794 Returns MATCH_YES if match is found. */
6797 gfc_match_enum (void)
6801 m = gfc_match_eos ();
6805 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENUM and ENUMERATOR at %C")
6813 /* Returns an initializer whose value is one higher than the value of the
6814 LAST_INITIALIZER argument. If the argument is NULL, the
6815 initializers value will be set to zero. The initializer's kind
6816 will be set to gfc_c_int_kind.
6818 If -fshort-enums is given, the appropriate kind will be selected
6819 later after all enumerators have been parsed. A warning is issued
6820 here if an initializer exceeds gfc_c_int_kind. */
6823 enum_initializer (gfc_expr *last_initializer, locus where)
6827 result = gfc_get_expr ();
6828 result->expr_type = EXPR_CONSTANT;
6829 result->ts.type = BT_INTEGER;
6830 result->ts.kind = gfc_c_int_kind;
6831 result->where = where;
6833 mpz_init (result->value.integer);
6835 if (last_initializer != NULL)
6837 mpz_add_ui (result->value.integer, last_initializer->value.integer, 1);
6838 result->where = last_initializer->where;
6840 if (gfc_check_integer_range (result->value.integer,
6841 gfc_c_int_kind) != ARITH_OK)
6843 gfc_error ("Enumerator exceeds the C integer type at %C");
6849 /* Control comes here, if it's the very first enumerator and no
6850 initializer has been given. It will be initialized to zero. */
6851 mpz_set_si (result->value.integer, 0);
6858 /* Match a variable name with an optional initializer. When this
6859 subroutine is called, a variable is expected to be parsed next.
6860 Depending on what is happening at the moment, updates either the
6861 symbol table or the current interface. */
6864 enumerator_decl (void)
6866 char name[GFC_MAX_SYMBOL_LEN + 1];
6867 gfc_expr *initializer;
6868 gfc_array_spec *as = NULL;
6876 old_locus = gfc_current_locus;
6878 /* When we get here, we've just matched a list of attributes and
6879 maybe a type and a double colon. The next thing we expect to see
6880 is the name of the symbol. */
6881 m = gfc_match_name (name);
6885 var_locus = gfc_current_locus;
6887 /* OK, we've successfully matched the declaration. Now put the
6888 symbol in the current namespace. If we fail to create the symbol,
6890 if (build_sym (name, NULL, &as, &var_locus) == FAILURE)
6896 /* The double colon must be present in order to have initializers.
6897 Otherwise the statement is ambiguous with an assignment statement. */
6900 if (gfc_match_char ('=') == MATCH_YES)
6902 m = gfc_match_init_expr (&initializer);
6905 gfc_error ("Expected an initialization expression at %C");
6914 /* If we do not have an initializer, the initialization value of the
6915 previous enumerator (stored in last_initializer) is incremented
6916 by 1 and is used to initialize the current enumerator. */
6917 if (initializer == NULL)
6918 initializer = enum_initializer (last_initializer, old_locus);
6920 if (initializer == NULL || initializer->ts.type != BT_INTEGER)
6922 gfc_error("ENUMERATOR %L not initialized with integer expression",
6925 gfc_free_enum_history ();
6929 /* Store this current initializer, for the next enumerator variable
6930 to be parsed. add_init_expr_to_sym() zeros initializer, so we
6931 use last_initializer below. */
6932 last_initializer = initializer;
6933 t = add_init_expr_to_sym (name, &initializer, &var_locus);
6935 /* Maintain enumerator history. */
6936 gfc_find_symbol (name, NULL, 0, &sym);
6937 create_enum_history (sym, last_initializer);
6939 return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR;
6942 /* Free stuff up and return. */
6943 gfc_free_expr (initializer);
6949 /* Match the enumerator definition statement. */
6952 gfc_match_enumerator_def (void)
6957 gfc_clear_ts (¤t_ts);
6959 m = gfc_match (" enumerator");
6963 m = gfc_match (" :: ");
6964 if (m == MATCH_ERROR)
6967 colon_seen = (m == MATCH_YES);
6969 if (gfc_current_state () != COMP_ENUM)
6971 gfc_error ("ENUM definition statement expected before %C");
6972 gfc_free_enum_history ();
6976 (¤t_ts)->type = BT_INTEGER;
6977 (¤t_ts)->kind = gfc_c_int_kind;
6979 gfc_clear_attr (¤t_attr);
6980 t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, NULL);
6989 m = enumerator_decl ();
6990 if (m == MATCH_ERROR)
6995 if (gfc_match_eos () == MATCH_YES)
6997 if (gfc_match_char (',') != MATCH_YES)
7001 if (gfc_current_state () == COMP_ENUM)
7003 gfc_free_enum_history ();
7004 gfc_error ("Syntax error in ENUMERATOR definition at %C");
7009 gfc_free_array_spec (current_as);
7016 /* Match binding attributes. */
7019 match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc)
7021 bool found_passing = false;
7022 bool seen_ptr = false;
7025 /* Intialize to defaults. Do so even before the MATCH_NO check so that in
7026 this case the defaults are in there. */
7027 ba->access = ACCESS_UNKNOWN;
7028 ba->pass_arg = NULL;
7029 ba->pass_arg_num = 0;
7031 ba->non_overridable = 0;
7034 /* If we find a comma, we believe there are binding attributes. */
7035 if (gfc_match_char (',') == MATCH_NO)
7037 ba->access = gfc_typebound_default_access;
7043 /* Access specifier. */
7045 m = gfc_match (" public");
7046 if (m == MATCH_ERROR)
7050 if (ba->access != ACCESS_UNKNOWN)
7052 gfc_error ("Duplicate access-specifier at %C");
7056 ba->access = ACCESS_PUBLIC;
7060 m = gfc_match (" private");
7061 if (m == MATCH_ERROR)
7065 if (ba->access != ACCESS_UNKNOWN)
7067 gfc_error ("Duplicate access-specifier at %C");
7071 ba->access = ACCESS_PRIVATE;
7075 /* If inside GENERIC, the following is not allowed. */
7080 m = gfc_match (" nopass");
7081 if (m == MATCH_ERROR)
7087 gfc_error ("Binding attributes already specify passing,"
7088 " illegal NOPASS at %C");
7092 found_passing = true;
7097 /* PASS possibly including argument. */
7098 m = gfc_match (" pass");
7099 if (m == MATCH_ERROR)
7103 char arg[GFC_MAX_SYMBOL_LEN + 1];
7107 gfc_error ("Binding attributes already specify passing,"
7108 " illegal PASS at %C");
7112 m = gfc_match (" ( %n )", arg);
7113 if (m == MATCH_ERROR)
7116 ba->pass_arg = xstrdup (arg);
7117 gcc_assert ((m == MATCH_YES) == (ba->pass_arg != NULL));
7119 found_passing = true;
7127 m = gfc_match (" pointer");
7128 if (m == MATCH_ERROR)
7134 gfc_error ("Duplicate POINTER attribute at %C");
7145 /* NON_OVERRIDABLE flag. */
7146 m = gfc_match (" non_overridable");
7147 if (m == MATCH_ERROR)
7151 if (ba->non_overridable)
7153 gfc_error ("Duplicate NON_OVERRIDABLE at %C");
7157 ba->non_overridable = 1;
7161 /* DEFERRED flag. */
7162 m = gfc_match (" deferred");
7163 if (m == MATCH_ERROR)
7169 gfc_error ("Duplicate DEFERRED at %C");
7180 /* Nothing matching found. */
7182 gfc_error ("Expected access-specifier at %C");
7184 gfc_error ("Expected binding attribute at %C");
7187 while (gfc_match_char (',') == MATCH_YES);
7189 /* NON_OVERRIDABLE and DEFERRED exclude themselves. */
7190 if (ba->non_overridable && ba->deferred)
7192 gfc_error ("NON_OVERRIDABLE and DEFERRED can't both appear at %C");
7196 if (ba->access == ACCESS_UNKNOWN)
7197 ba->access = gfc_typebound_default_access;
7199 if (ppc && !seen_ptr)
7201 gfc_error ("POINTER attribute is required for procedure pointer component"
7209 gfc_free (ba->pass_arg);
7214 /* Match a PROCEDURE specific binding inside a derived type. */
7217 match_procedure_in_type (void)
7219 char name[GFC_MAX_SYMBOL_LEN + 1];
7220 char target_buf[GFC_MAX_SYMBOL_LEN + 1];
7221 char* target = NULL;
7222 gfc_typebound_proc* tb;
7230 /* Check current state. */
7231 gcc_assert (gfc_state_stack->state == COMP_DERIVED_CONTAINS);
7232 block = gfc_state_stack->previous->sym;
7235 /* Try to match PROCEDURE(interface). */
7236 if (gfc_match (" (") == MATCH_YES)
7238 m = gfc_match_name (target_buf);
7239 if (m == MATCH_ERROR)
7243 gfc_error ("Interface-name expected after '(' at %C");
7247 if (gfc_match (" )") != MATCH_YES)
7249 gfc_error ("')' expected at %C");
7253 target = target_buf;
7256 /* Construct the data structure. */
7257 tb = gfc_get_typebound_proc ();
7258 tb->where = gfc_current_locus;
7261 /* Match binding attributes. */
7262 m = match_binding_attributes (tb, false, false);
7263 if (m == MATCH_ERROR)
7265 seen_attrs = (m == MATCH_YES);
7267 /* Check that attribute DEFERRED is given iff an interface is specified, which
7268 means target != NULL. */
7269 if (tb->deferred && !target)
7271 gfc_error ("Interface must be specified for DEFERRED binding at %C");
7274 if (target && !tb->deferred)
7276 gfc_error ("PROCEDURE(interface) at %C should be declared DEFERRED");
7280 /* Match the colons. */
7281 m = gfc_match (" ::");
7282 if (m == MATCH_ERROR)
7284 seen_colons = (m == MATCH_YES);
7285 if (seen_attrs && !seen_colons)
7287 gfc_error ("Expected '::' after binding-attributes at %C");
7291 /* Match the binding name. */
7292 m = gfc_match_name (name);
7293 if (m == MATCH_ERROR)
7297 gfc_error ("Expected binding name at %C");
7301 /* Try to match the '=> target', if it's there. */
7302 m = gfc_match (" =>");
7303 if (m == MATCH_ERROR)
7309 gfc_error ("'=> target' is invalid for DEFERRED binding at %C");
7315 gfc_error ("'::' needed in PROCEDURE binding with explicit target"
7320 m = gfc_match_name (target_buf);
7321 if (m == MATCH_ERROR)
7325 gfc_error ("Expected binding target after '=>' at %C");
7328 target = target_buf;
7331 /* Now we should have the end. */
7332 m = gfc_match_eos ();
7333 if (m == MATCH_ERROR)
7337 gfc_error ("Junk after PROCEDURE declaration at %C");
7341 /* If no target was found, it has the same name as the binding. */
7345 /* Get the namespace to insert the symbols into. */
7346 ns = block->f2k_derived;
7349 /* If the binding is DEFERRED, check that the containing type is ABSTRACT. */
7350 if (tb->deferred && !block->attr.abstract)
7352 gfc_error ("Type '%s' containing DEFERRED binding at %C is not ABSTRACT",
7357 /* See if we already have a binding with this name in the symtree which would
7358 be an error. If a GENERIC already targetted this binding, it may be
7359 already there but then typebound is still NULL. */
7360 stree = gfc_find_symtree (ns->tb_sym_root, name);
7361 if (stree && stree->n.tb)
7363 gfc_error ("There's already a procedure with binding name '%s' for the"
7364 " derived type '%s' at %C", name, block->name);
7368 /* Insert it and set attributes. */
7372 stree = gfc_new_symtree (&ns->tb_sym_root, name);
7377 if (gfc_get_sym_tree (target, gfc_current_ns, &tb->u.specific))
7379 gfc_set_sym_referenced (tb->u.specific->n.sym);
7385 /* Match a GENERIC procedure binding inside a derived type. */
7388 gfc_match_generic (void)
7390 char name[GFC_MAX_SYMBOL_LEN + 1];
7392 gfc_typebound_proc tbattr; /* Used for match_binding_attributes. */
7393 gfc_typebound_proc* tb;
7398 /* Check current state. */
7399 if (gfc_current_state () == COMP_DERIVED)
7401 gfc_error ("GENERIC at %C must be inside a derived-type CONTAINS");
7404 if (gfc_current_state () != COMP_DERIVED_CONTAINS)
7406 block = gfc_state_stack->previous->sym;
7407 ns = block->f2k_derived;
7408 gcc_assert (block && ns);
7410 /* See if we get an access-specifier. */
7411 m = match_binding_attributes (&tbattr, true, false);
7412 if (m == MATCH_ERROR)
7415 /* Now the colons, those are required. */
7416 if (gfc_match (" ::") != MATCH_YES)
7418 gfc_error ("Expected '::' at %C");
7422 /* The binding name and =>. */
7423 m = gfc_match (" %n =>", name);
7424 if (m == MATCH_ERROR)
7428 gfc_error ("Expected generic name at %C");
7432 /* If there's already something with this name, check that it is another
7433 GENERIC and then extend that rather than build a new node. */
7434 st = gfc_find_symtree (ns->tb_sym_root, name);
7437 gcc_assert (st->n.tb);
7440 if (!tb->is_generic)
7442 gfc_error ("There's already a non-generic procedure with binding name"
7443 " '%s' for the derived type '%s' at %C",
7448 if (tb->access != tbattr.access)
7450 gfc_error ("Binding at %C must have the same access as already"
7451 " defined binding '%s'", name);
7457 st = gfc_new_symtree (&ns->tb_sym_root, name);
7460 st->n.tb = tb = gfc_get_typebound_proc ();
7461 tb->where = gfc_current_locus;
7462 tb->access = tbattr.access;
7464 tb->u.generic = NULL;
7467 /* Now, match all following names as specific targets. */
7470 gfc_symtree* target_st;
7471 gfc_tbp_generic* target;
7473 m = gfc_match_name (name);
7474 if (m == MATCH_ERROR)
7478 gfc_error ("Expected specific binding name at %C");
7482 target_st = gfc_get_tbp_symtree (&ns->tb_sym_root, name);
7484 /* See if this is a duplicate specification. */
7485 for (target = tb->u.generic; target; target = target->next)
7486 if (target_st == target->specific_st)
7488 gfc_error ("'%s' already defined as specific binding for the"
7489 " generic '%s' at %C", name, st->name);
7493 target = gfc_get_tbp_generic ();
7494 target->specific_st = target_st;
7495 target->specific = NULL;
7496 target->next = tb->u.generic;
7497 tb->u.generic = target;
7499 while (gfc_match (" ,") == MATCH_YES);
7501 /* Here should be the end. */
7502 if (gfc_match_eos () != MATCH_YES)
7504 gfc_error ("Junk after GENERIC binding at %C");
7515 /* Match a FINAL declaration inside a derived type. */
7518 gfc_match_final_decl (void)
7520 char name[GFC_MAX_SYMBOL_LEN + 1];
7523 gfc_namespace* module_ns;
7527 if (gfc_state_stack->state != COMP_DERIVED_CONTAINS)
7529 gfc_error ("FINAL declaration at %C must be inside a derived type "
7530 "CONTAINS section");
7534 block = gfc_state_stack->previous->sym;
7537 if (!gfc_state_stack->previous || !gfc_state_stack->previous->previous
7538 || gfc_state_stack->previous->previous->state != COMP_MODULE)
7540 gfc_error ("Derived type declaration with FINAL at %C must be in the"
7541 " specification part of a MODULE");
7545 module_ns = gfc_current_ns;
7546 gcc_assert (module_ns);
7547 gcc_assert (module_ns->proc_name->attr.flavor == FL_MODULE);
7549 /* Match optional ::, don't care about MATCH_YES or MATCH_NO. */
7550 if (gfc_match (" ::") == MATCH_ERROR)
7553 /* Match the sequence of procedure names. */
7560 if (first && gfc_match_eos () == MATCH_YES)
7562 gfc_error ("Empty FINAL at %C");
7566 m = gfc_match_name (name);
7569 gfc_error ("Expected module procedure name at %C");
7572 else if (m != MATCH_YES)
7575 if (gfc_match_eos () == MATCH_YES)
7577 if (!last && gfc_match_char (',') != MATCH_YES)
7579 gfc_error ("Expected ',' at %C");
7583 if (gfc_get_symbol (name, module_ns, &sym))
7585 gfc_error ("Unknown procedure name \"%s\" at %C", name);
7589 /* Mark the symbol as module procedure. */
7590 if (sym->attr.proc != PROC_MODULE
7591 && gfc_add_procedure (&sym->attr, PROC_MODULE,
7592 sym->name, NULL) == FAILURE)
7595 /* Check if we already have this symbol in the list, this is an error. */
7596 for (f = block->f2k_derived->finalizers; f; f = f->next)
7597 if (f->proc_sym == sym)
7599 gfc_error ("'%s' at %C is already defined as FINAL procedure!",
7604 /* Add this symbol to the list of finalizers. */
7605 gcc_assert (block->f2k_derived);
7607 f = XCNEW (gfc_finalizer);
7609 f->proc_tree = NULL;
7610 f->where = gfc_current_locus;
7611 f->next = block->f2k_derived->finalizers;
7612 block->f2k_derived->finalizers = f;