1 /* Declaration statement matcher
2 Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008, 2009, 2010
3 Free Software Foundation, Inc.
4 Contributed by Andy Vaught
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
28 #include "constructor.h"
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 *********************/
574 /* Auxilliary function to merge DIMENSION and CODIMENSION array specs. */
577 merge_array_spec (gfc_array_spec *from, gfc_array_spec *to, bool copy)
581 if (to->rank == 0 && from->rank > 0)
583 to->rank = from->rank;
584 to->type = from->type;
585 to->cray_pointee = from->cray_pointee;
586 to->cp_was_assumed = from->cp_was_assumed;
588 for (i = 0; i < to->corank; i++)
590 to->lower[from->rank + i] = to->lower[i];
591 to->upper[from->rank + i] = to->upper[i];
593 for (i = 0; i < from->rank; i++)
597 to->lower[i] = gfc_copy_expr (from->lower[i]);
598 to->upper[i] = gfc_copy_expr (from->upper[i]);
602 to->lower[i] = from->lower[i];
603 to->upper[i] = from->upper[i];
607 else if (to->corank == 0 && from->corank > 0)
609 to->corank = from->corank;
610 to->cotype = from->cotype;
612 for (i = 0; i < from->corank; i++)
616 to->lower[to->rank + i] = gfc_copy_expr (from->lower[i]);
617 to->upper[to->rank + i] = gfc_copy_expr (from->upper[i]);
621 to->lower[to->rank + i] = from->lower[i];
622 to->upper[to->rank + i] = from->upper[i];
629 /* Match an intent specification. Since this can only happen after an
630 INTENT word, a legal intent-spec must follow. */
633 match_intent_spec (void)
636 if (gfc_match (" ( in out )") == MATCH_YES)
638 if (gfc_match (" ( in )") == MATCH_YES)
640 if (gfc_match (" ( out )") == MATCH_YES)
643 gfc_error ("Bad INTENT specification at %C");
644 return INTENT_UNKNOWN;
648 /* Matches a character length specification, which is either a
649 specification expression or a '*'. */
652 char_len_param_value (gfc_expr **expr)
656 if (gfc_match_char ('*') == MATCH_YES)
662 m = gfc_match_expr (expr);
665 && gfc_expr_check_typed (*expr, gfc_current_ns, false) == FAILURE)
668 if (m == MATCH_YES && (*expr)->expr_type == EXPR_FUNCTION)
670 if ((*expr)->value.function.actual
671 && (*expr)->value.function.actual->expr->symtree)
674 e = (*expr)->value.function.actual->expr;
675 if (e->symtree->n.sym->attr.flavor == FL_PROCEDURE
676 && e->expr_type == EXPR_VARIABLE)
678 if (e->symtree->n.sym->ts.type == BT_UNKNOWN)
680 if (e->symtree->n.sym->ts.type == BT_CHARACTER
681 && e->symtree->n.sym->ts.u.cl
682 && e->symtree->n.sym->ts.u.cl->length->ts.type == BT_UNKNOWN)
690 gfc_error ("Conflict in attributes of function argument at %C");
695 /* A character length is a '*' followed by a literal integer or a
696 char_len_param_value in parenthesis. */
699 match_char_length (gfc_expr **expr)
704 m = gfc_match_char ('*');
708 m = gfc_match_small_literal_int (&length, NULL);
709 if (m == MATCH_ERROR)
714 if (gfc_notify_std (GFC_STD_F95_OBS, "Obsolescent feature: "
715 "Old-style character length at %C") == FAILURE)
717 *expr = gfc_get_int_expr (gfc_default_integer_kind, NULL, length);
721 if (gfc_match_char ('(') == MATCH_NO)
724 m = char_len_param_value (expr);
725 if (m != MATCH_YES && gfc_matching_function)
731 if (m == MATCH_ERROR)
736 if (gfc_match_char (')') == MATCH_NO)
738 gfc_free_expr (*expr);
746 gfc_error ("Syntax error in character length specification at %C");
751 /* Special subroutine for finding a symbol. Check if the name is found
752 in the current name space. If not, and we're compiling a function or
753 subroutine and the parent compilation unit is an interface, then check
754 to see if the name we've been given is the name of the interface
755 (located in another namespace). */
758 find_special (const char *name, gfc_symbol **result, bool allow_subroutine)
764 i = gfc_get_sym_tree (name, NULL, &st, allow_subroutine);
767 *result = st ? st->n.sym : NULL;
771 if (gfc_current_state () != COMP_SUBROUTINE
772 && gfc_current_state () != COMP_FUNCTION)
775 s = gfc_state_stack->previous;
779 if (s->state != COMP_INTERFACE)
782 goto end; /* Nameless interface. */
784 if (strcmp (name, s->sym->name) == 0)
795 /* Special subroutine for getting a symbol node associated with a
796 procedure name, used in SUBROUTINE and FUNCTION statements. The
797 symbol is created in the parent using with symtree node in the
798 child unit pointing to the symbol. If the current namespace has no
799 parent, then the symbol is just created in the current unit. */
802 get_proc_name (const char *name, gfc_symbol **result, bool module_fcn_entry)
808 /* Module functions have to be left in their own namespace because
809 they have potentially (almost certainly!) already been referenced.
810 In this sense, they are rather like external functions. This is
811 fixed up in resolve.c(resolve_entries), where the symbol name-
812 space is set to point to the master function, so that the fake
813 result mechanism can work. */
814 if (module_fcn_entry)
816 /* Present if entry is declared to be a module procedure. */
817 rc = gfc_find_symbol (name, gfc_current_ns->parent, 0, result);
820 rc = gfc_get_symbol (name, NULL, result);
821 else if (!gfc_get_symbol (name, NULL, &sym) && sym
822 && (*result)->ts.type == BT_UNKNOWN
823 && sym->attr.flavor == FL_UNKNOWN)
824 /* Pick up the typespec for the entry, if declared in the function
825 body. Note that this symbol is FL_UNKNOWN because it will
826 only have appeared in a type declaration. The local symtree
827 is set to point to the module symbol and a unique symtree
828 to the local version. This latter ensures a correct clearing
831 /* If the ENTRY proceeds its specification, we need to ensure
832 that this does not raise a "has no IMPLICIT type" error. */
833 if (sym->ts.type == BT_UNKNOWN)
834 sym->attr.untyped = 1;
836 (*result)->ts = sym->ts;
838 /* Put the symbol in the procedure namespace so that, should
839 the ENTRY precede its specification, the specification
841 (*result)->ns = gfc_current_ns;
843 gfc_find_sym_tree (name, gfc_current_ns, 0, &st);
845 st = gfc_get_unique_symtree (gfc_current_ns);
850 rc = gfc_get_symbol (name, gfc_current_ns->parent, result);
856 gfc_current_ns->refs++;
858 if (sym && !sym->gfc_new && gfc_current_state () != COMP_INTERFACE)
860 /* Trap another encompassed procedure with the same name. All
861 these conditions are necessary to avoid picking up an entry
862 whose name clashes with that of the encompassing procedure;
863 this is handled using gsymbols to register unique,globally
865 if (sym->attr.flavor != 0
866 && sym->attr.proc != 0
867 && (sym->attr.subroutine || sym->attr.function)
868 && sym->attr.if_source != IFSRC_UNKNOWN)
869 gfc_error_now ("Procedure '%s' at %C is already defined at %L",
870 name, &sym->declared_at);
872 /* Trap a procedure with a name the same as interface in the
873 encompassing scope. */
874 if (sym->attr.generic != 0
875 && (sym->attr.subroutine || sym->attr.function)
876 && !sym->attr.mod_proc)
877 gfc_error_now ("Name '%s' at %C is already defined"
878 " as a generic interface at %L",
879 name, &sym->declared_at);
881 /* Trap declarations of attributes in encompassing scope. The
882 signature for this is that ts.kind is set. Legitimate
883 references only set ts.type. */
884 if (sym->ts.kind != 0
885 && !sym->attr.implicit_type
886 && sym->attr.proc == 0
887 && gfc_current_ns->parent != NULL
888 && sym->attr.access == 0
889 && !module_fcn_entry)
890 gfc_error_now ("Procedure '%s' at %C has an explicit interface "
891 "and must not have attributes declared at %L",
892 name, &sym->declared_at);
895 if (gfc_current_ns->parent == NULL || *result == NULL)
898 /* Module function entries will already have a symtree in
899 the current namespace but will need one at module level. */
900 if (module_fcn_entry)
902 /* Present if entry is declared to be a module procedure. */
903 rc = gfc_find_sym_tree (name, gfc_current_ns->parent, 0, &st);
905 st = gfc_new_symtree (&gfc_current_ns->parent->sym_root, name);
908 st = gfc_new_symtree (&gfc_current_ns->sym_root, name);
913 /* See if the procedure should be a module procedure. */
915 if (((sym->ns->proc_name != NULL
916 && sym->ns->proc_name->attr.flavor == FL_MODULE
917 && sym->attr.proc != PROC_MODULE)
918 || (module_fcn_entry && sym->attr.proc != PROC_MODULE))
919 && gfc_add_procedure (&sym->attr, PROC_MODULE,
920 sym->name, NULL) == FAILURE)
927 /* Verify that the given symbol representing a parameter is C
928 interoperable, by checking to see if it was marked as such after
929 its declaration. If the given symbol is not interoperable, a
930 warning is reported, thus removing the need to return the status to
931 the calling function. The standard does not require the user use
932 one of the iso_c_binding named constants to declare an
933 interoperable parameter, but we can't be sure if the param is C
934 interop or not if the user doesn't. For example, integer(4) may be
935 legal Fortran, but doesn't have meaning in C. It may interop with
936 a number of the C types, which causes a problem because the
937 compiler can't know which one. This code is almost certainly not
938 portable, and the user will get what they deserve if the C type
939 across platforms isn't always interoperable with integer(4). If
940 the user had used something like integer(c_int) or integer(c_long),
941 the compiler could have automatically handled the varying sizes
945 verify_c_interop_param (gfc_symbol *sym)
947 int is_c_interop = 0;
948 gfc_try retval = SUCCESS;
950 /* We check implicitly typed variables in symbol.c:gfc_set_default_type().
951 Don't repeat the checks here. */
952 if (sym->attr.implicit_type)
955 /* For subroutines or functions that are passed to a BIND(C) procedure,
956 they're interoperable if they're BIND(C) and their params are all
958 if (sym->attr.flavor == FL_PROCEDURE)
960 if (sym->attr.is_bind_c == 0)
962 gfc_error_now ("Procedure '%s' at %L must have the BIND(C) "
963 "attribute to be C interoperable", sym->name,
964 &(sym->declared_at));
970 if (sym->attr.is_c_interop == 1)
971 /* We've already checked this procedure; don't check it again. */
974 return verify_bind_c_sym (sym, &(sym->ts), sym->attr.in_common,
979 /* See if we've stored a reference to a procedure that owns sym. */
980 if (sym->ns != NULL && sym->ns->proc_name != NULL)
982 if (sym->ns->proc_name->attr.is_bind_c == 1)
985 (verify_c_interop (&(sym->ts))
988 if (is_c_interop != 1)
990 /* Make personalized messages to give better feedback. */
991 if (sym->ts.type == BT_DERIVED)
992 gfc_error ("Type '%s' at %L is a parameter to the BIND(C) "
993 " procedure '%s' but is not C interoperable "
994 "because derived type '%s' is not C interoperable",
995 sym->name, &(sym->declared_at),
996 sym->ns->proc_name->name,
997 sym->ts.u.derived->name);
999 gfc_warning ("Variable '%s' at %L is a parameter to the "
1000 "BIND(C) procedure '%s' but may not be C "
1002 sym->name, &(sym->declared_at),
1003 sym->ns->proc_name->name);
1006 /* Character strings are only C interoperable if they have a
1008 if (sym->ts.type == BT_CHARACTER)
1010 gfc_charlen *cl = sym->ts.u.cl;
1011 if (!cl || !cl->length || cl->length->expr_type != EXPR_CONSTANT
1012 || mpz_cmp_si (cl->length->value.integer, 1) != 0)
1014 gfc_error ("Character argument '%s' at %L "
1015 "must be length 1 because "
1016 "procedure '%s' is BIND(C)",
1017 sym->name, &sym->declared_at,
1018 sym->ns->proc_name->name);
1023 /* We have to make sure that any param to a bind(c) routine does
1024 not have the allocatable, pointer, or optional attributes,
1025 according to J3/04-007, section 5.1. */
1026 if (sym->attr.allocatable == 1)
1028 gfc_error ("Variable '%s' at %L cannot have the "
1029 "ALLOCATABLE attribute because procedure '%s'"
1030 " is BIND(C)", sym->name, &(sym->declared_at),
1031 sym->ns->proc_name->name);
1035 if (sym->attr.pointer == 1)
1037 gfc_error ("Variable '%s' at %L cannot have the "
1038 "POINTER attribute because procedure '%s'"
1039 " is BIND(C)", sym->name, &(sym->declared_at),
1040 sym->ns->proc_name->name);
1044 if (sym->attr.optional == 1)
1046 gfc_error ("Variable '%s' at %L cannot have the "
1047 "OPTIONAL attribute because procedure '%s'"
1048 " is BIND(C)", sym->name, &(sym->declared_at),
1049 sym->ns->proc_name->name);
1053 /* Make sure that if it has the dimension attribute, that it is
1054 either assumed size or explicit shape. */
1055 if (sym->as != NULL)
1057 if (sym->as->type == AS_ASSUMED_SHAPE)
1059 gfc_error ("Assumed-shape array '%s' at %L cannot be an "
1060 "argument to the procedure '%s' at %L because "
1061 "the procedure is BIND(C)", sym->name,
1062 &(sym->declared_at), sym->ns->proc_name->name,
1063 &(sym->ns->proc_name->declared_at));
1067 if (sym->as->type == AS_DEFERRED)
1069 gfc_error ("Deferred-shape array '%s' at %L cannot be an "
1070 "argument to the procedure '%s' at %L because "
1071 "the procedure is BIND(C)", sym->name,
1072 &(sym->declared_at), sym->ns->proc_name->name,
1073 &(sym->ns->proc_name->declared_at));
1085 /* Function called by variable_decl() that adds a name to the symbol table. */
1088 build_sym (const char *name, gfc_charlen *cl,
1089 gfc_array_spec **as, locus *var_locus)
1091 symbol_attribute attr;
1094 if (gfc_get_symbol (name, NULL, &sym))
1097 /* Start updating the symbol table. Add basic type attribute if present. */
1098 if (current_ts.type != BT_UNKNOWN
1099 && (sym->attr.implicit_type == 0
1100 || !gfc_compare_types (&sym->ts, ¤t_ts))
1101 && gfc_add_type (sym, ¤t_ts, var_locus) == FAILURE)
1104 if (sym->ts.type == BT_CHARACTER)
1107 /* Add dimension attribute if present. */
1108 if (gfc_set_array_spec (sym, *as, var_locus) == FAILURE)
1112 /* Add attribute to symbol. The copy is so that we can reset the
1113 dimension attribute. */
1114 attr = current_attr;
1116 attr.codimension = 0;
1118 if (gfc_copy_attr (&sym->attr, &attr, var_locus) == FAILURE)
1121 /* Finish any work that may need to be done for the binding label,
1122 if it's a bind(c). The bind(c) attr is found before the symbol
1123 is made, and before the symbol name (for data decls), so the
1124 current_ts is holding the binding label, or nothing if the
1125 name= attr wasn't given. Therefore, test here if we're dealing
1126 with a bind(c) and make sure the binding label is set correctly. */
1127 if (sym->attr.is_bind_c == 1)
1129 if (sym->binding_label[0] == '\0')
1131 /* Set the binding label and verify that if a NAME= was specified
1132 then only one identifier was in the entity-decl-list. */
1133 if (set_binding_label (sym->binding_label, sym->name,
1134 num_idents_on_line) == FAILURE)
1139 /* See if we know we're in a common block, and if it's a bind(c)
1140 common then we need to make sure we're an interoperable type. */
1141 if (sym->attr.in_common == 1)
1143 /* Test the common block object. */
1144 if (sym->common_block != NULL && sym->common_block->is_bind_c == 1
1145 && sym->ts.is_c_interop != 1)
1147 gfc_error_now ("Variable '%s' in common block '%s' at %C "
1148 "must be declared with a C interoperable "
1149 "kind since common block '%s' is BIND(C)",
1150 sym->name, sym->common_block->name,
1151 sym->common_block->name);
1156 sym->attr.implied_index = 0;
1158 if (sym->ts.type == BT_CLASS)
1160 sym->attr.class_ok = (sym->attr.dummy
1161 || sym->attr.pointer
1162 || sym->attr.allocatable) ? 1 : 0;
1163 gfc_build_class_symbol (&sym->ts, &sym->attr, &sym->as, false);
1170 /* Set character constant to the given length. The constant will be padded or
1171 truncated. If we're inside an array constructor without a typespec, we
1172 additionally check that all elements have the same length; check_len -1
1173 means no checking. */
1176 gfc_set_constant_character_len (int len, gfc_expr *expr, int check_len)
1181 gcc_assert (expr->expr_type == EXPR_CONSTANT);
1182 gcc_assert (expr->ts.type == BT_CHARACTER);
1184 slen = expr->value.character.length;
1187 s = gfc_get_wide_string (len + 1);
1188 memcpy (s, expr->value.character.string,
1189 MIN (len, slen) * sizeof (gfc_char_t));
1191 gfc_wide_memset (&s[slen], ' ', len - slen);
1193 if (gfc_option.warn_character_truncation && slen > len)
1194 gfc_warning_now ("CHARACTER expression at %L is being truncated "
1195 "(%d/%d)", &expr->where, slen, len);
1197 /* Apply the standard by 'hand' otherwise it gets cleared for
1199 if (check_len != -1 && slen != check_len
1200 && !(gfc_option.allow_std & GFC_STD_GNU))
1201 gfc_error_now ("The CHARACTER elements of the array constructor "
1202 "at %L must have the same length (%d/%d)",
1203 &expr->where, slen, check_len);
1206 gfc_free (expr->value.character.string);
1207 expr->value.character.string = s;
1208 expr->value.character.length = len;
1213 /* Function to create and update the enumerator history
1214 using the information passed as arguments.
1215 Pointer "max_enum" is also updated, to point to
1216 enum history node containing largest initializer.
1218 SYM points to the symbol node of enumerator.
1219 INIT points to its enumerator value. */
1222 create_enum_history (gfc_symbol *sym, gfc_expr *init)
1224 enumerator_history *new_enum_history;
1225 gcc_assert (sym != NULL && init != NULL);
1227 new_enum_history = XCNEW (enumerator_history);
1229 new_enum_history->sym = sym;
1230 new_enum_history->initializer = init;
1231 new_enum_history->next = NULL;
1233 if (enum_history == NULL)
1235 enum_history = new_enum_history;
1236 max_enum = enum_history;
1240 new_enum_history->next = enum_history;
1241 enum_history = new_enum_history;
1243 if (mpz_cmp (max_enum->initializer->value.integer,
1244 new_enum_history->initializer->value.integer) < 0)
1245 max_enum = new_enum_history;
1250 /* Function to free enum kind history. */
1253 gfc_free_enum_history (void)
1255 enumerator_history *current = enum_history;
1256 enumerator_history *next;
1258 while (current != NULL)
1260 next = current->next;
1265 enum_history = NULL;
1269 /* Function called by variable_decl() that adds an initialization
1270 expression to a symbol. */
1273 add_init_expr_to_sym (const char *name, gfc_expr **initp, locus *var_locus)
1275 symbol_attribute attr;
1280 if (find_special (name, &sym, false))
1285 /* If this symbol is confirming an implicit parameter type,
1286 then an initialization expression is not allowed. */
1287 if (attr.flavor == FL_PARAMETER
1288 && sym->value != NULL
1291 gfc_error ("Initializer not allowed for PARAMETER '%s' at %C",
1298 /* An initializer is required for PARAMETER declarations. */
1299 if (attr.flavor == FL_PARAMETER)
1301 gfc_error ("PARAMETER at %L is missing an initializer", var_locus);
1307 /* If a variable appears in a DATA block, it cannot have an
1311 gfc_error ("Variable '%s' at %C with an initializer already "
1312 "appears in a DATA statement", sym->name);
1316 /* Check if the assignment can happen. This has to be put off
1317 until later for a derived type variable. */
1318 if (sym->ts.type != BT_DERIVED && init->ts.type != BT_DERIVED
1319 && sym->ts.type != BT_CLASS && init->ts.type != BT_CLASS
1320 && gfc_check_assign_symbol (sym, init) == FAILURE)
1323 if (sym->ts.type == BT_CHARACTER && sym->ts.u.cl
1324 && init->ts.type == BT_CHARACTER)
1326 /* Update symbol character length according initializer. */
1327 if (gfc_check_assign_symbol (sym, init) == FAILURE)
1330 if (sym->ts.u.cl->length == NULL)
1333 /* If there are multiple CHARACTER variables declared on the
1334 same line, we don't want them to share the same length. */
1335 sym->ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL);
1337 if (sym->attr.flavor == FL_PARAMETER)
1339 if (init->expr_type == EXPR_CONSTANT)
1341 clen = init->value.character.length;
1342 sym->ts.u.cl->length
1343 = gfc_get_int_expr (gfc_default_integer_kind,
1346 else if (init->expr_type == EXPR_ARRAY)
1349 c = gfc_constructor_first (init->value.constructor);
1350 clen = c->expr->value.character.length;
1351 sym->ts.u.cl->length
1352 = gfc_get_int_expr (gfc_default_integer_kind,
1355 else if (init->ts.u.cl && init->ts.u.cl->length)
1356 sym->ts.u.cl->length =
1357 gfc_copy_expr (sym->value->ts.u.cl->length);
1360 /* Update initializer character length according symbol. */
1361 else if (sym->ts.u.cl->length->expr_type == EXPR_CONSTANT)
1363 int len = mpz_get_si (sym->ts.u.cl->length->value.integer);
1365 if (init->expr_type == EXPR_CONSTANT)
1366 gfc_set_constant_character_len (len, init, -1);
1367 else if (init->expr_type == EXPR_ARRAY)
1371 /* Build a new charlen to prevent simplification from
1372 deleting the length before it is resolved. */
1373 init->ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL);
1374 init->ts.u.cl->length = gfc_copy_expr (sym->ts.u.cl->length);
1376 for (c = gfc_constructor_first (init->value.constructor);
1377 c; c = gfc_constructor_next (c))
1378 gfc_set_constant_character_len (len, c->expr, -1);
1383 /* Need to check if the expression we initialized this
1384 to was one of the iso_c_binding named constants. If so,
1385 and we're a parameter (constant), let it be iso_c.
1387 integer(c_int), parameter :: my_int = c_int
1388 integer(my_int) :: my_int_2
1389 If we mark my_int as iso_c (since we can see it's value
1390 is equal to one of the named constants), then my_int_2
1391 will be considered C interoperable. */
1392 if (sym->ts.type != BT_CHARACTER && sym->ts.type != BT_DERIVED)
1394 sym->ts.is_iso_c |= init->ts.is_iso_c;
1395 sym->ts.is_c_interop |= init->ts.is_c_interop;
1396 /* attr bits needed for module files. */
1397 sym->attr.is_iso_c |= init->ts.is_iso_c;
1398 sym->attr.is_c_interop |= init->ts.is_c_interop;
1399 if (init->ts.is_iso_c)
1400 sym->ts.f90_type = init->ts.f90_type;
1403 /* Add initializer. Make sure we keep the ranks sane. */
1404 if (sym->attr.dimension && init->rank == 0)
1409 if (sym->attr.flavor == FL_PARAMETER
1410 && init->expr_type == EXPR_CONSTANT
1411 && spec_size (sym->as, &size) == SUCCESS
1412 && mpz_cmp_si (size, 0) > 0)
1414 array = gfc_get_array_expr (init->ts.type, init->ts.kind,
1416 for (n = 0; n < (int)mpz_get_si (size); n++)
1417 gfc_constructor_append_expr (&array->value.constructor,
1420 : gfc_copy_expr (init),
1423 array->shape = gfc_get_shape (sym->as->rank);
1424 for (n = 0; n < sym->as->rank; n++)
1425 spec_dimen_size (sym->as, n, &array->shape[n]);
1430 init->rank = sym->as->rank;
1434 if (sym->attr.save == SAVE_NONE)
1435 sym->attr.save = SAVE_IMPLICIT;
1443 /* Function called by variable_decl() that adds a name to a structure
1447 build_struct (const char *name, gfc_charlen *cl, gfc_expr **init,
1448 gfc_array_spec **as)
1451 gfc_try t = SUCCESS;
1453 /* F03:C438/C439. If the current symbol is of the same derived type that we're
1454 constructing, it must have the pointer attribute. */
1455 if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS)
1456 && current_ts.u.derived == gfc_current_block ()
1457 && current_attr.pointer == 0)
1459 gfc_error ("Component at %C must have the POINTER attribute");
1463 if (gfc_current_block ()->attr.pointer && (*as)->rank != 0)
1465 if ((*as)->type != AS_DEFERRED && (*as)->type != AS_EXPLICIT)
1467 gfc_error ("Array component of structure at %C must have explicit "
1468 "or deferred shape");
1473 if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE)
1477 if (c->ts.type == BT_CHARACTER)
1479 c->attr = current_attr;
1481 c->initializer = *init;
1488 c->attr.codimension = 1;
1490 c->attr.dimension = 1;
1494 /* Should this ever get more complicated, combine with similar section
1495 in add_init_expr_to_sym into a separate function. */
1496 if (c->ts.type == BT_CHARACTER && !c->attr.pointer && c->initializer && c->ts.u.cl
1497 && c->ts.u.cl->length && c->ts.u.cl->length->expr_type == EXPR_CONSTANT)
1501 gcc_assert (c->ts.u.cl && c->ts.u.cl->length);
1502 gcc_assert (c->ts.u.cl->length->expr_type == EXPR_CONSTANT);
1503 gcc_assert (c->ts.u.cl->length->ts.type == BT_INTEGER);
1505 len = mpz_get_si (c->ts.u.cl->length->value.integer);
1507 if (c->initializer->expr_type == EXPR_CONSTANT)
1508 gfc_set_constant_character_len (len, c->initializer, -1);
1509 else if (mpz_cmp (c->ts.u.cl->length->value.integer,
1510 c->initializer->ts.u.cl->length->value.integer))
1512 gfc_constructor *ctor;
1513 ctor = gfc_constructor_first (c->initializer->value.constructor);
1518 bool has_ts = (c->initializer->ts.u.cl
1519 && c->initializer->ts.u.cl->length_from_typespec);
1521 /* Remember the length of the first element for checking
1522 that all elements *in the constructor* have the same
1523 length. This need not be the length of the LHS! */
1524 gcc_assert (ctor->expr->expr_type == EXPR_CONSTANT);
1525 gcc_assert (ctor->expr->ts.type == BT_CHARACTER);
1526 first_len = ctor->expr->value.character.length;
1528 for ( ; ctor; ctor = gfc_constructor_next (ctor))
1529 if (ctor->expr->expr_type == EXPR_CONSTANT)
1531 gfc_set_constant_character_len (len, ctor->expr,
1532 has_ts ? -1 : first_len);
1533 ctor->expr->ts.u.cl->length = gfc_copy_expr (c->ts.u.cl->length);
1539 /* Check array components. */
1540 if (!c->attr.dimension)
1543 if (c->attr.pointer)
1545 if (c->as->type != AS_DEFERRED)
1547 gfc_error ("Pointer array component of structure at %C must have a "
1552 else if (c->attr.allocatable)
1554 if (c->as->type != AS_DEFERRED)
1556 gfc_error ("Allocatable component of structure at %C must have a "
1563 if (c->as->type != AS_EXPLICIT)
1565 gfc_error ("Array component of structure at %C must have an "
1572 if (c->ts.type == BT_CLASS)
1573 gfc_build_class_symbol (&c->ts, &c->attr, &c->as, true);
1579 /* Match a 'NULL()', and possibly take care of some side effects. */
1582 gfc_match_null (gfc_expr **result)
1587 m = gfc_match (" null ( )");
1591 /* The NULL symbol now has to be/become an intrinsic function. */
1592 if (gfc_get_symbol ("null", NULL, &sym))
1594 gfc_error ("NULL() initialization at %C is ambiguous");
1598 gfc_intrinsic_symbol (sym);
1600 if (sym->attr.proc != PROC_INTRINSIC
1601 && (gfc_add_procedure (&sym->attr, PROC_INTRINSIC,
1602 sym->name, NULL) == FAILURE
1603 || gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE))
1606 *result = gfc_get_null_expr (&gfc_current_locus);
1612 /* Match a variable name with an optional initializer. When this
1613 subroutine is called, a variable is expected to be parsed next.
1614 Depending on what is happening at the moment, updates either the
1615 symbol table or the current interface. */
1618 variable_decl (int elem)
1620 char name[GFC_MAX_SYMBOL_LEN + 1];
1621 gfc_expr *initializer, *char_len;
1623 gfc_array_spec *cp_as; /* Extra copy for Cray Pointees. */
1634 /* When we get here, we've just matched a list of attributes and
1635 maybe a type and a double colon. The next thing we expect to see
1636 is the name of the symbol. */
1637 m = gfc_match_name (name);
1641 var_locus = gfc_current_locus;
1643 /* Now we could see the optional array spec. or character length. */
1644 m = gfc_match_array_spec (&as, true, true);
1645 if (gfc_option.flag_cray_pointer && m == MATCH_YES)
1646 cp_as = gfc_copy_array_spec (as);
1647 else if (m == MATCH_ERROR)
1651 as = gfc_copy_array_spec (current_as);
1652 else if (current_as)
1653 merge_array_spec (current_as, as, true);
1658 if (current_ts.type == BT_CHARACTER)
1660 switch (match_char_length (&char_len))
1663 cl = gfc_new_charlen (gfc_current_ns, NULL);
1665 cl->length = char_len;
1668 /* Non-constant lengths need to be copied after the first
1669 element. Also copy assumed lengths. */
1672 && (current_ts.u.cl->length == NULL
1673 || current_ts.u.cl->length->expr_type != EXPR_CONSTANT))
1675 cl = gfc_new_charlen (gfc_current_ns, NULL);
1676 cl->length = gfc_copy_expr (current_ts.u.cl->length);
1679 cl = current_ts.u.cl;
1688 /* If this symbol has already shown up in a Cray Pointer declaration,
1689 then we want to set the type & bail out. */
1690 if (gfc_option.flag_cray_pointer)
1692 gfc_find_symbol (name, gfc_current_ns, 1, &sym);
1693 if (sym != NULL && sym->attr.cray_pointee)
1695 sym->ts.type = current_ts.type;
1696 sym->ts.kind = current_ts.kind;
1698 sym->ts.u.derived = current_ts.u.derived;
1699 sym->ts.is_c_interop = current_ts.is_c_interop;
1700 sym->ts.is_iso_c = current_ts.is_iso_c;
1703 /* Check to see if we have an array specification. */
1706 if (sym->as != NULL)
1708 gfc_error ("Duplicate array spec for Cray pointee at %C");
1709 gfc_free_array_spec (cp_as);
1715 if (gfc_set_array_spec (sym, cp_as, &var_locus) == FAILURE)
1716 gfc_internal_error ("Couldn't set pointee array spec.");
1718 /* Fix the array spec. */
1719 m = gfc_mod_pointee_as (sym->as);
1720 if (m == MATCH_ERROR)
1728 gfc_free_array_spec (cp_as);
1732 /* Procedure pointer as function result. */
1733 if (gfc_current_state () == COMP_FUNCTION
1734 && strcmp ("ppr@", gfc_current_block ()->name) == 0
1735 && strcmp (name, gfc_current_block ()->ns->proc_name->name) == 0)
1736 strcpy (name, "ppr@");
1738 if (gfc_current_state () == COMP_FUNCTION
1739 && strcmp (name, gfc_current_block ()->name) == 0
1740 && gfc_current_block ()->result
1741 && strcmp ("ppr@", gfc_current_block ()->result->name) == 0)
1742 strcpy (name, "ppr@");
1744 /* OK, we've successfully matched the declaration. Now put the
1745 symbol in the current namespace, because it might be used in the
1746 optional initialization expression for this symbol, e.g. this is
1749 integer, parameter :: i = huge(i)
1751 This is only true for parameters or variables of a basic type.
1752 For components of derived types, it is not true, so we don't
1753 create a symbol for those yet. If we fail to create the symbol,
1755 if (gfc_current_state () != COMP_DERIVED
1756 && build_sym (name, cl, &as, &var_locus) == FAILURE)
1762 /* An interface body specifies all of the procedure's
1763 characteristics and these shall be consistent with those
1764 specified in the procedure definition, except that the interface
1765 may specify a procedure that is not pure if the procedure is
1766 defined to be pure(12.3.2). */
1767 if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS)
1768 && gfc_current_ns->proc_name
1769 && gfc_current_ns->proc_name->attr.if_source == IFSRC_IFBODY
1770 && current_ts.u.derived->ns != gfc_current_ns)
1773 st = gfc_find_symtree (gfc_current_ns->sym_root, current_ts.u.derived->name);
1774 if (!(current_ts.u.derived->attr.imported
1776 && st->n.sym == current_ts.u.derived)
1777 && !gfc_current_ns->has_import_set)
1779 gfc_error ("the type of '%s' at %C has not been declared within the "
1786 /* In functions that have a RESULT variable defined, the function
1787 name always refers to function calls. Therefore, the name is
1788 not allowed to appear in specification statements. */
1789 if (gfc_current_state () == COMP_FUNCTION
1790 && gfc_current_block () != NULL
1791 && gfc_current_block ()->result != NULL
1792 && gfc_current_block ()->result != gfc_current_block ()
1793 && strcmp (gfc_current_block ()->name, name) == 0)
1795 gfc_error ("Function name '%s' not allowed at %C", name);
1800 /* We allow old-style initializations of the form
1801 integer i /2/, j(4) /3*3, 1/
1802 (if no colon has been seen). These are different from data
1803 statements in that initializers are only allowed to apply to the
1804 variable immediately preceding, i.e.
1806 is not allowed. Therefore we have to do some work manually, that
1807 could otherwise be left to the matchers for DATA statements. */
1809 if (!colon_seen && gfc_match (" /") == MATCH_YES)
1811 if (gfc_notify_std (GFC_STD_GNU, "Extension: Old-style "
1812 "initialization at %C") == FAILURE)
1815 return match_old_style_init (name);
1818 /* The double colon must be present in order to have initializers.
1819 Otherwise the statement is ambiguous with an assignment statement. */
1822 if (gfc_match (" =>") == MATCH_YES)
1824 if (!current_attr.pointer)
1826 gfc_error ("Initialization at %C isn't for a pointer variable");
1831 m = gfc_match_null (&initializer);
1834 gfc_error ("Pointer initialization requires a NULL() at %C");
1838 if (gfc_pure (NULL) && gfc_state_stack->state != COMP_DERIVED)
1840 gfc_error ("Initialization of pointer at %C is not allowed in "
1841 "a PURE procedure");
1849 else if (gfc_match_char ('=') == MATCH_YES)
1851 if (current_attr.pointer)
1853 gfc_error ("Pointer initialization at %C requires '=>', "
1859 m = gfc_match_init_expr (&initializer);
1862 gfc_error ("Expected an initialization expression at %C");
1866 if (current_attr.flavor != FL_PARAMETER && gfc_pure (NULL)
1867 && gfc_state_stack->state != COMP_DERIVED)
1869 gfc_error ("Initialization of variable at %C is not allowed in "
1870 "a PURE procedure");
1879 if (initializer != NULL && current_attr.allocatable
1880 && gfc_current_state () == COMP_DERIVED)
1882 gfc_error ("Initialization of allocatable component at %C is not "
1888 /* Add the initializer. Note that it is fine if initializer is
1889 NULL here, because we sometimes also need to check if a
1890 declaration *must* have an initialization expression. */
1891 if (gfc_current_state () != COMP_DERIVED)
1892 t = add_init_expr_to_sym (name, &initializer, &var_locus);
1895 if (current_ts.type == BT_DERIVED
1896 && !current_attr.pointer && !initializer)
1897 initializer = gfc_default_initializer (¤t_ts);
1898 t = build_struct (name, cl, &initializer, &as);
1901 m = (t == SUCCESS) ? MATCH_YES : MATCH_ERROR;
1904 /* Free stuff up and return. */
1905 gfc_free_expr (initializer);
1906 gfc_free_array_spec (as);
1912 /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification.
1913 This assumes that the byte size is equal to the kind number for
1914 non-COMPLEX types, and equal to twice the kind number for COMPLEX. */
1917 gfc_match_old_kind_spec (gfc_typespec *ts)
1922 if (gfc_match_char ('*') != MATCH_YES)
1925 m = gfc_match_small_literal_int (&ts->kind, NULL);
1929 original_kind = ts->kind;
1931 /* Massage the kind numbers for complex types. */
1932 if (ts->type == BT_COMPLEX)
1936 gfc_error ("Old-style type declaration %s*%d not supported at %C",
1937 gfc_basic_typename (ts->type), original_kind);
1943 if (gfc_validate_kind (ts->type, ts->kind, true) < 0)
1945 gfc_error ("Old-style type declaration %s*%d not supported at %C",
1946 gfc_basic_typename (ts->type), original_kind);
1950 if (gfc_notify_std (GFC_STD_GNU, "Nonstandard type declaration %s*%d at %C",
1951 gfc_basic_typename (ts->type), original_kind) == FAILURE)
1958 /* Match a kind specification. Since kinds are generally optional, we
1959 usually return MATCH_NO if something goes wrong. If a "kind="
1960 string is found, then we know we have an error. */
1963 gfc_match_kind_spec (gfc_typespec *ts, bool kind_expr_only)
1975 where = loc = gfc_current_locus;
1980 if (gfc_match_char ('(') == MATCH_NO)
1983 /* Also gobbles optional text. */
1984 if (gfc_match (" kind = ") == MATCH_YES)
1987 loc = gfc_current_locus;
1990 n = gfc_match_init_expr (&e);
1994 if (gfc_matching_function)
1996 /* The function kind expression might include use associated or
1997 imported parameters and try again after the specification
1999 if (gfc_match_char (')') != MATCH_YES)
2001 gfc_error ("Missing right parenthesis at %C");
2007 gfc_undo_symbols ();
2012 /* ....or else, the match is real. */
2014 gfc_error ("Expected initialization expression at %C");
2022 gfc_error ("Expected scalar initialization expression at %C");
2027 msg = gfc_extract_int (e, &ts->kind);
2036 /* Before throwing away the expression, let's see if we had a
2037 C interoperable kind (and store the fact). */
2038 if (e->ts.is_c_interop == 1)
2040 /* Mark this as c interoperable if being declared with one
2041 of the named constants from iso_c_binding. */
2042 ts->is_c_interop = e->ts.is_iso_c;
2043 ts->f90_type = e->ts.f90_type;
2049 /* Ignore errors to this point, if we've gotten here. This means
2050 we ignore the m=MATCH_ERROR from above. */
2051 if (gfc_validate_kind (ts->type, ts->kind, true) < 0)
2053 gfc_error ("Kind %d not supported for type %s at %C", ts->kind,
2054 gfc_basic_typename (ts->type));
2055 gfc_current_locus = where;
2059 /* Warn if, e.g., c_int is used for a REAL variable, but not
2060 if, e.g., c_double is used for COMPLEX as the standard
2061 explicitly says that the kind type parameter for complex and real
2062 variable is the same, i.e. c_float == c_float_complex. */
2063 if (ts->f90_type != BT_UNKNOWN && ts->f90_type != ts->type
2064 && !((ts->f90_type == BT_REAL && ts->type == BT_COMPLEX)
2065 || (ts->f90_type == BT_COMPLEX && ts->type == BT_REAL)))
2066 gfc_warning_now ("C kind type parameter is for type %s but type at %L "
2067 "is %s", gfc_basic_typename (ts->f90_type), &where,
2068 gfc_basic_typename (ts->type));
2070 gfc_gobble_whitespace ();
2071 if ((c = gfc_next_ascii_char ()) != ')'
2072 && (ts->type != BT_CHARACTER || c != ','))
2074 if (ts->type == BT_CHARACTER)
2075 gfc_error ("Missing right parenthesis or comma at %C");
2077 gfc_error ("Missing right parenthesis at %C");
2081 /* All tests passed. */
2084 if(m == MATCH_ERROR)
2085 gfc_current_locus = where;
2087 /* Return what we know from the test(s). */
2092 gfc_current_locus = where;
2098 match_char_kind (int * kind, int * is_iso_c)
2107 where = gfc_current_locus;
2109 n = gfc_match_init_expr (&e);
2111 if (n != MATCH_YES && gfc_matching_function)
2113 /* The expression might include use-associated or imported
2114 parameters and try again after the specification
2117 gfc_undo_symbols ();
2122 gfc_error ("Expected initialization expression at %C");
2128 gfc_error ("Expected scalar initialization expression at %C");
2133 msg = gfc_extract_int (e, kind);
2134 *is_iso_c = e->ts.is_iso_c;
2144 /* Ignore errors to this point, if we've gotten here. This means
2145 we ignore the m=MATCH_ERROR from above. */
2146 if (gfc_validate_kind (BT_CHARACTER, *kind, true) < 0)
2148 gfc_error ("Kind %d is not supported for CHARACTER at %C", *kind);
2152 /* All tests passed. */
2155 if (m == MATCH_ERROR)
2156 gfc_current_locus = where;
2158 /* Return what we know from the test(s). */
2163 gfc_current_locus = where;
2168 /* Match the various kind/length specifications in a CHARACTER
2169 declaration. We don't return MATCH_NO. */
2172 gfc_match_char_spec (gfc_typespec *ts)
2174 int kind, seen_length, is_iso_c;
2184 /* Try the old-style specification first. */
2185 old_char_selector = 0;
2187 m = match_char_length (&len);
2191 old_char_selector = 1;
2196 m = gfc_match_char ('(');
2199 m = MATCH_YES; /* Character without length is a single char. */
2203 /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ). */
2204 if (gfc_match (" kind =") == MATCH_YES)
2206 m = match_char_kind (&kind, &is_iso_c);
2208 if (m == MATCH_ERROR)
2213 if (gfc_match (" , len =") == MATCH_NO)
2216 m = char_len_param_value (&len);
2219 if (m == MATCH_ERROR)
2226 /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>". */
2227 if (gfc_match (" len =") == MATCH_YES)
2229 m = char_len_param_value (&len);
2232 if (m == MATCH_ERROR)
2236 if (gfc_match_char (')') == MATCH_YES)
2239 if (gfc_match (" , kind =") != MATCH_YES)
2242 if (match_char_kind (&kind, &is_iso_c) == MATCH_ERROR)
2248 /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */
2249 m = char_len_param_value (&len);
2252 if (m == MATCH_ERROR)
2256 m = gfc_match_char (')');
2260 if (gfc_match_char (',') != MATCH_YES)
2263 gfc_match (" kind ="); /* Gobble optional text. */
2265 m = match_char_kind (&kind, &is_iso_c);
2266 if (m == MATCH_ERROR)
2272 /* Require a right-paren at this point. */
2273 m = gfc_match_char (')');
2278 gfc_error ("Syntax error in CHARACTER declaration at %C");
2280 gfc_free_expr (len);
2284 /* Deal with character functions after USE and IMPORT statements. */
2285 if (gfc_matching_function)
2287 gfc_free_expr (len);
2288 gfc_undo_symbols ();
2294 gfc_free_expr (len);
2298 /* Do some final massaging of the length values. */
2299 cl = gfc_new_charlen (gfc_current_ns, NULL);
2301 if (seen_length == 0)
2302 cl->length = gfc_get_int_expr (gfc_default_integer_kind, NULL, 1);
2307 ts->kind = kind == 0 ? gfc_default_character_kind : kind;
2309 /* We have to know if it was a c interoperable kind so we can
2310 do accurate type checking of bind(c) procs, etc. */
2312 /* Mark this as c interoperable if being declared with one
2313 of the named constants from iso_c_binding. */
2314 ts->is_c_interop = is_iso_c;
2315 else if (len != NULL)
2316 /* Here, we might have parsed something such as: character(c_char)
2317 In this case, the parsing code above grabs the c_char when
2318 looking for the length (line 1690, roughly). it's the last
2319 testcase for parsing the kind params of a character variable.
2320 However, it's not actually the length. this seems like it
2322 To see if the user used a C interop kind, test the expr
2323 of the so called length, and see if it's C interoperable. */
2324 ts->is_c_interop = len->ts.is_iso_c;
2330 /* Matches a declaration-type-spec (F03:R502). If successful, sets the ts
2331 structure to the matched specification. This is necessary for FUNCTION and
2332 IMPLICIT statements.
2334 If implicit_flag is nonzero, then we don't check for the optional
2335 kind specification. Not doing so is needed for matching an IMPLICIT
2336 statement correctly. */
2339 gfc_match_decl_type_spec (gfc_typespec *ts, int implicit_flag)
2341 char name[GFC_MAX_SYMBOL_LEN + 1];
2345 bool seen_deferred_kind;
2347 /* A belt and braces check that the typespec is correctly being treated
2348 as a deferred characteristic association. */
2349 seen_deferred_kind = (gfc_current_state () == COMP_FUNCTION)
2350 && (gfc_current_block ()->result->ts.kind == -1)
2351 && (ts->kind == -1);
2353 if (seen_deferred_kind)
2356 /* Clear the current binding label, in case one is given. */
2357 curr_binding_label[0] = '\0';
2359 if (gfc_match (" byte") == MATCH_YES)
2361 if (gfc_notify_std (GFC_STD_GNU, "Extension: BYTE type at %C")
2365 if (gfc_validate_kind (BT_INTEGER, 1, true) < 0)
2367 gfc_error ("BYTE type used at %C "
2368 "is not available on the target machine");
2372 ts->type = BT_INTEGER;
2377 if (gfc_match (" integer") == MATCH_YES)
2379 ts->type = BT_INTEGER;
2380 ts->kind = gfc_default_integer_kind;
2384 if (gfc_match (" character") == MATCH_YES)
2386 ts->type = BT_CHARACTER;
2387 if (implicit_flag == 0)
2388 return gfc_match_char_spec (ts);
2393 if (gfc_match (" real") == MATCH_YES)
2396 ts->kind = gfc_default_real_kind;
2400 if (gfc_match (" double precision") == MATCH_YES)
2403 ts->kind = gfc_default_double_kind;
2407 if (gfc_match (" complex") == MATCH_YES)
2409 ts->type = BT_COMPLEX;
2410 ts->kind = gfc_default_complex_kind;
2414 if (gfc_match (" double complex") == MATCH_YES)
2416 if (gfc_notify_std (GFC_STD_GNU, "DOUBLE COMPLEX at %C does not "
2417 "conform to the Fortran 95 standard") == FAILURE)
2420 ts->type = BT_COMPLEX;
2421 ts->kind = gfc_default_double_kind;
2425 if (gfc_match (" logical") == MATCH_YES)
2427 ts->type = BT_LOGICAL;
2428 ts->kind = gfc_default_logical_kind;
2432 m = gfc_match (" type ( %n )", name);
2434 ts->type = BT_DERIVED;
2437 m = gfc_match (" class ( %n )", name);
2440 ts->type = BT_CLASS;
2442 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: CLASS statement at %C")
2447 /* Defer association of the derived type until the end of the
2448 specification block. However, if the derived type can be
2449 found, add it to the typespec. */
2450 if (gfc_matching_function)
2452 ts->u.derived = NULL;
2453 if (gfc_current_state () != COMP_INTERFACE
2454 && !gfc_find_symbol (name, NULL, 1, &sym) && sym)
2455 ts->u.derived = sym;
2459 /* Search for the name but allow the components to be defined later. If
2460 type = -1, this typespec has been seen in a function declaration but
2461 the type could not be accessed at that point. */
2463 if (ts->kind != -1 && gfc_get_ha_symbol (name, &sym))
2465 gfc_error ("Type name '%s' at %C is ambiguous", name);
2468 else if (ts->kind == -1)
2470 int iface = gfc_state_stack->previous->state != COMP_INTERFACE
2471 || gfc_current_ns->has_import_set;
2472 if (gfc_find_symbol (name, NULL, iface, &sym))
2474 gfc_error ("Type name '%s' at %C is ambiguous", name);
2483 if (sym->attr.flavor != FL_DERIVED
2484 && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE)
2487 gfc_set_sym_referenced (sym);
2488 ts->u.derived = sym;
2493 /* For all types except double, derived and character, look for an
2494 optional kind specifier. MATCH_NO is actually OK at this point. */
2495 if (implicit_flag == 1)
2498 if (gfc_current_form == FORM_FREE)
2500 c = gfc_peek_ascii_char ();
2501 if (!gfc_is_whitespace (c) && c != '*' && c != '('
2502 && c != ':' && c != ',')
2506 m = gfc_match_kind_spec (ts, false);
2507 if (m == MATCH_NO && ts->type != BT_CHARACTER)
2508 m = gfc_match_old_kind_spec (ts);
2510 /* Defer association of the KIND expression of function results
2511 until after USE and IMPORT statements. */
2512 if ((gfc_current_state () == COMP_NONE && gfc_error_flag_test ())
2513 || gfc_matching_function)
2517 m = MATCH_YES; /* No kind specifier found. */
2523 /* Match an IMPLICIT NONE statement. Actually, this statement is
2524 already matched in parse.c, or we would not end up here in the
2525 first place. So the only thing we need to check, is if there is
2526 trailing garbage. If not, the match is successful. */
2529 gfc_match_implicit_none (void)
2531 return (gfc_match_eos () == MATCH_YES) ? MATCH_YES : MATCH_NO;
2535 /* Match the letter range(s) of an IMPLICIT statement. */
2538 match_implicit_range (void)
2544 cur_loc = gfc_current_locus;
2546 gfc_gobble_whitespace ();
2547 c = gfc_next_ascii_char ();
2550 gfc_error ("Missing character range in IMPLICIT at %C");
2557 gfc_gobble_whitespace ();
2558 c1 = gfc_next_ascii_char ();
2562 gfc_gobble_whitespace ();
2563 c = gfc_next_ascii_char ();
2568 inner = 0; /* Fall through. */
2575 gfc_gobble_whitespace ();
2576 c2 = gfc_next_ascii_char ();
2580 gfc_gobble_whitespace ();
2581 c = gfc_next_ascii_char ();
2583 if ((c != ',') && (c != ')'))
2596 gfc_error ("Letters must be in alphabetic order in "
2597 "IMPLICIT statement at %C");
2601 /* See if we can add the newly matched range to the pending
2602 implicits from this IMPLICIT statement. We do not check for
2603 conflicts with whatever earlier IMPLICIT statements may have
2604 set. This is done when we've successfully finished matching
2606 if (gfc_add_new_implicit_range (c1, c2) != SUCCESS)
2613 gfc_syntax_error (ST_IMPLICIT);
2615 gfc_current_locus = cur_loc;
2620 /* Match an IMPLICIT statement, storing the types for
2621 gfc_set_implicit() if the statement is accepted by the parser.
2622 There is a strange looking, but legal syntactic construction
2623 possible. It looks like:
2625 IMPLICIT INTEGER (a-b) (c-d)
2627 This is legal if "a-b" is a constant expression that happens to
2628 equal one of the legal kinds for integers. The real problem
2629 happens with an implicit specification that looks like:
2631 IMPLICIT INTEGER (a-b)
2633 In this case, a typespec matcher that is "greedy" (as most of the
2634 matchers are) gobbles the character range as a kindspec, leaving
2635 nothing left. We therefore have to go a bit more slowly in the
2636 matching process by inhibiting the kindspec checking during
2637 typespec matching and checking for a kind later. */
2640 gfc_match_implicit (void)
2649 /* We don't allow empty implicit statements. */
2650 if (gfc_match_eos () == MATCH_YES)
2652 gfc_error ("Empty IMPLICIT statement at %C");
2658 /* First cleanup. */
2659 gfc_clear_new_implicit ();
2661 /* A basic type is mandatory here. */
2662 m = gfc_match_decl_type_spec (&ts, 1);
2663 if (m == MATCH_ERROR)
2668 cur_loc = gfc_current_locus;
2669 m = match_implicit_range ();
2673 /* We may have <TYPE> (<RANGE>). */
2674 gfc_gobble_whitespace ();
2675 c = gfc_next_ascii_char ();
2676 if ((c == '\n') || (c == ','))
2678 /* Check for CHARACTER with no length parameter. */
2679 if (ts.type == BT_CHARACTER && !ts.u.cl)
2681 ts.kind = gfc_default_character_kind;
2682 ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL);
2683 ts.u.cl->length = gfc_get_int_expr (gfc_default_integer_kind,
2687 /* Record the Successful match. */
2688 if (gfc_merge_new_implicit (&ts) != SUCCESS)
2693 gfc_current_locus = cur_loc;
2696 /* Discard the (incorrectly) matched range. */
2697 gfc_clear_new_implicit ();
2699 /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */
2700 if (ts.type == BT_CHARACTER)
2701 m = gfc_match_char_spec (&ts);
2704 m = gfc_match_kind_spec (&ts, false);
2707 m = gfc_match_old_kind_spec (&ts);
2708 if (m == MATCH_ERROR)
2714 if (m == MATCH_ERROR)
2717 m = match_implicit_range ();
2718 if (m == MATCH_ERROR)
2723 gfc_gobble_whitespace ();
2724 c = gfc_next_ascii_char ();
2725 if ((c != '\n') && (c != ','))
2728 if (gfc_merge_new_implicit (&ts) != SUCCESS)
2736 gfc_syntax_error (ST_IMPLICIT);
2744 gfc_match_import (void)
2746 char name[GFC_MAX_SYMBOL_LEN + 1];
2751 if (gfc_current_ns->proc_name == NULL
2752 || gfc_current_ns->proc_name->attr.if_source != IFSRC_IFBODY)
2754 gfc_error ("IMPORT statement at %C only permitted in "
2755 "an INTERFACE body");
2759 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IMPORT statement at %C")
2763 if (gfc_match_eos () == MATCH_YES)
2765 /* All host variables should be imported. */
2766 gfc_current_ns->has_import_set = 1;
2770 if (gfc_match (" ::") == MATCH_YES)
2772 if (gfc_match_eos () == MATCH_YES)
2774 gfc_error ("Expecting list of named entities at %C");
2781 m = gfc_match (" %n", name);
2785 if (gfc_current_ns->parent != NULL
2786 && gfc_find_symbol (name, gfc_current_ns->parent, 1, &sym))
2788 gfc_error ("Type name '%s' at %C is ambiguous", name);
2791 else if (gfc_current_ns->proc_name->ns->parent != NULL
2792 && gfc_find_symbol (name,
2793 gfc_current_ns->proc_name->ns->parent,
2796 gfc_error ("Type name '%s' at %C is ambiguous", name);
2802 gfc_error ("Cannot IMPORT '%s' from host scoping unit "
2803 "at %C - does not exist.", name);
2807 if (gfc_find_symtree (gfc_current_ns->sym_root,name))
2809 gfc_warning ("'%s' is already IMPORTed from host scoping unit "
2814 st = gfc_new_symtree (&gfc_current_ns->sym_root, sym->name);
2817 sym->attr.imported = 1;
2829 if (gfc_match_eos () == MATCH_YES)
2831 if (gfc_match_char (',') != MATCH_YES)
2838 gfc_error ("Syntax error in IMPORT statement at %C");
2843 /* A minimal implementation of gfc_match without whitespace, escape
2844 characters or variable arguments. Returns true if the next
2845 characters match the TARGET template exactly. */
2848 match_string_p (const char *target)
2852 for (p = target; *p; p++)
2853 if ((char) gfc_next_ascii_char () != *p)
2858 /* Matches an attribute specification including array specs. If
2859 successful, leaves the variables current_attr and current_as
2860 holding the specification. Also sets the colon_seen variable for
2861 later use by matchers associated with initializations.
2863 This subroutine is a little tricky in the sense that we don't know
2864 if we really have an attr-spec until we hit the double colon.
2865 Until that time, we can only return MATCH_NO. This forces us to
2866 check for duplicate specification at this level. */
2869 match_attr_spec (void)
2871 /* Modifiers that can exist in a type statement. */
2873 { GFC_DECL_BEGIN = 0,
2874 DECL_ALLOCATABLE = GFC_DECL_BEGIN, DECL_DIMENSION, DECL_EXTERNAL,
2875 DECL_IN, DECL_OUT, DECL_INOUT, DECL_INTRINSIC, DECL_OPTIONAL,
2876 DECL_PARAMETER, DECL_POINTER, DECL_PROTECTED, DECL_PRIVATE,
2877 DECL_PUBLIC, DECL_SAVE, DECL_TARGET, DECL_VALUE, DECL_VOLATILE,
2878 DECL_IS_BIND_C, DECL_CODIMENSION, DECL_ASYNCHRONOUS, DECL_CONTIGUOUS,
2879 DECL_NONE, GFC_DECL_END /* Sentinel */
2883 /* GFC_DECL_END is the sentinel, index starts at 0. */
2884 #define NUM_DECL GFC_DECL_END
2886 locus start, seen_at[NUM_DECL];
2893 gfc_clear_attr (¤t_attr);
2894 start = gfc_current_locus;
2899 /* See if we get all of the keywords up to the final double colon. */
2900 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
2908 gfc_gobble_whitespace ();
2910 ch = gfc_next_ascii_char ();
2913 /* This is the successful exit condition for the loop. */
2914 if (gfc_next_ascii_char () == ':')
2919 gfc_gobble_whitespace ();
2920 switch (gfc_peek_ascii_char ())
2923 gfc_next_ascii_char ();
2924 switch (gfc_next_ascii_char ())
2927 if (match_string_p ("locatable"))
2929 /* Matched "allocatable". */
2930 d = DECL_ALLOCATABLE;
2935 if (match_string_p ("ynchronous"))
2937 /* Matched "asynchronous". */
2938 d = DECL_ASYNCHRONOUS;
2945 /* Try and match the bind(c). */
2946 m = gfc_match_bind_c (NULL, true);
2949 else if (m == MATCH_ERROR)
2954 gfc_next_ascii_char ();
2955 if ('o' != gfc_next_ascii_char ())
2957 switch (gfc_next_ascii_char ())
2960 if (match_string_p ("imension"))
2962 d = DECL_CODIMENSION;
2966 if (match_string_p ("tiguous"))
2968 d = DECL_CONTIGUOUS;
2975 if (match_string_p ("dimension"))
2980 if (match_string_p ("external"))
2985 if (match_string_p ("int"))
2987 ch = gfc_next_ascii_char ();
2990 if (match_string_p ("nt"))
2992 /* Matched "intent". */
2993 /* TODO: Call match_intent_spec from here. */
2994 if (gfc_match (" ( in out )") == MATCH_YES)
2996 else if (gfc_match (" ( in )") == MATCH_YES)
2998 else if (gfc_match (" ( out )") == MATCH_YES)
3004 if (match_string_p ("insic"))
3006 /* Matched "intrinsic". */
3014 if (match_string_p ("optional"))
3019 gfc_next_ascii_char ();
3020 switch (gfc_next_ascii_char ())
3023 if (match_string_p ("rameter"))
3025 /* Matched "parameter". */
3031 if (match_string_p ("inter"))
3033 /* Matched "pointer". */
3039 ch = gfc_next_ascii_char ();
3042 if (match_string_p ("vate"))
3044 /* Matched "private". */
3050 if (match_string_p ("tected"))
3052 /* Matched "protected". */
3059 if (match_string_p ("blic"))
3061 /* Matched "public". */
3069 if (match_string_p ("save"))
3074 if (match_string_p ("target"))
3079 gfc_next_ascii_char ();
3080 ch = gfc_next_ascii_char ();
3083 if (match_string_p ("lue"))
3085 /* Matched "value". */
3091 if (match_string_p ("latile"))
3093 /* Matched "volatile". */
3101 /* No double colon and no recognizable decl_type, so assume that
3102 we've been looking at something else the whole time. */
3109 /* Check to make sure any parens are paired up correctly. */
3110 if (gfc_match_parens () == MATCH_ERROR)
3117 seen_at[d] = gfc_current_locus;
3119 if (d == DECL_DIMENSION || d == DECL_CODIMENSION)
3121 gfc_array_spec *as = NULL;
3123 m = gfc_match_array_spec (&as, d == DECL_DIMENSION,
3124 d == DECL_CODIMENSION);
3126 if (current_as == NULL)
3128 else if (m == MATCH_YES)
3130 merge_array_spec (as, current_as, false);
3136 if (d == DECL_CODIMENSION)
3137 gfc_error ("Missing codimension specification at %C");
3139 gfc_error ("Missing dimension specification at %C");
3143 if (m == MATCH_ERROR)
3148 /* Since we've seen a double colon, we have to be looking at an
3149 attr-spec. This means that we can now issue errors. */
3150 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
3155 case DECL_ALLOCATABLE:
3156 attr = "ALLOCATABLE";
3158 case DECL_ASYNCHRONOUS:
3159 attr = "ASYNCHRONOUS";
3161 case DECL_CODIMENSION:
3162 attr = "CODIMENSION";
3164 case DECL_CONTIGUOUS:
3165 attr = "CONTIGUOUS";
3167 case DECL_DIMENSION:
3174 attr = "INTENT (IN)";
3177 attr = "INTENT (OUT)";
3180 attr = "INTENT (IN OUT)";
3182 case DECL_INTRINSIC:
3188 case DECL_PARAMETER:
3194 case DECL_PROTECTED:
3209 case DECL_IS_BIND_C:
3219 attr = NULL; /* This shouldn't happen. */
3222 gfc_error ("Duplicate %s attribute at %L", attr, &seen_at[d]);
3227 /* Now that we've dealt with duplicate attributes, add the attributes
3228 to the current attribute. */
3229 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
3234 if (gfc_current_state () == COMP_DERIVED
3235 && d != DECL_DIMENSION && d != DECL_CODIMENSION
3236 && d != DECL_POINTER && d != DECL_PRIVATE
3237 && d != DECL_PUBLIC && d != DECL_CONTIGUOUS && d != DECL_NONE)
3239 if (d == DECL_ALLOCATABLE)
3241 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ALLOCATABLE "
3242 "attribute at %C in a TYPE definition")
3251 gfc_error ("Attribute at %L is not allowed in a TYPE definition",
3258 if ((d == DECL_PRIVATE || d == DECL_PUBLIC)
3259 && gfc_current_state () != COMP_MODULE)
3261 if (d == DECL_PRIVATE)
3265 if (gfc_current_state () == COMP_DERIVED
3266 && gfc_state_stack->previous
3267 && gfc_state_stack->previous->state == COMP_MODULE)
3269 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Attribute %s "
3270 "at %L in a TYPE definition", attr,
3280 gfc_error ("%s attribute at %L is not allowed outside of the "
3281 "specification part of a module", attr, &seen_at[d]);
3289 case DECL_ALLOCATABLE:
3290 t = gfc_add_allocatable (¤t_attr, &seen_at[d]);
3293 case DECL_ASYNCHRONOUS:
3294 if (gfc_notify_std (GFC_STD_F2003,
3295 "Fortran 2003: ASYNCHRONOUS attribute at %C")
3299 t = gfc_add_asynchronous (¤t_attr, NULL, &seen_at[d]);
3302 case DECL_CODIMENSION:
3303 t = gfc_add_codimension (¤t_attr, NULL, &seen_at[d]);
3306 case DECL_CONTIGUOUS:
3307 if (gfc_notify_std (GFC_STD_F2008,
3308 "Fortran 2008: CONTIGUOUS attribute at %C")
3312 t = gfc_add_contiguous (¤t_attr, NULL, &seen_at[d]);
3315 case DECL_DIMENSION:
3316 t = gfc_add_dimension (¤t_attr, NULL, &seen_at[d]);
3320 t = gfc_add_external (¤t_attr, &seen_at[d]);
3324 t = gfc_add_intent (¤t_attr, INTENT_IN, &seen_at[d]);
3328 t = gfc_add_intent (¤t_attr, INTENT_OUT, &seen_at[d]);
3332 t = gfc_add_intent (¤t_attr, INTENT_INOUT, &seen_at[d]);
3335 case DECL_INTRINSIC:
3336 t = gfc_add_intrinsic (¤t_attr, &seen_at[d]);
3340 t = gfc_add_optional (¤t_attr, &seen_at[d]);
3343 case DECL_PARAMETER:
3344 t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, &seen_at[d]);
3348 t = gfc_add_pointer (¤t_attr, &seen_at[d]);
3351 case DECL_PROTECTED:
3352 if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE)
3354 gfc_error ("PROTECTED at %C only allowed in specification "
3355 "part of a module");
3360 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED "
3365 t = gfc_add_protected (¤t_attr, NULL, &seen_at[d]);
3369 t = gfc_add_access (¤t_attr, ACCESS_PRIVATE, NULL,
3374 t = gfc_add_access (¤t_attr, ACCESS_PUBLIC, NULL,
3379 t = gfc_add_save (¤t_attr, NULL, &seen_at[d]);
3383 t = gfc_add_target (¤t_attr, &seen_at[d]);
3386 case DECL_IS_BIND_C:
3387 t = gfc_add_is_bind_c(¤t_attr, NULL, &seen_at[d], 0);
3391 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE attribute "
3396 t = gfc_add_value (¤t_attr, NULL, &seen_at[d]);
3400 if (gfc_notify_std (GFC_STD_F2003,
3401 "Fortran 2003: VOLATILE attribute at %C")
3405 t = gfc_add_volatile (¤t_attr, NULL, &seen_at[d]);
3409 gfc_internal_error ("match_attr_spec(): Bad attribute");
3423 gfc_current_locus = start;
3424 gfc_free_array_spec (current_as);
3430 /* Set the binding label, dest_label, either with the binding label
3431 stored in the given gfc_typespec, ts, or if none was provided, it
3432 will be the symbol name in all lower case, as required by the draft
3433 (J3/04-007, section 15.4.1). If a binding label was given and
3434 there is more than one argument (num_idents), it is an error. */
3437 set_binding_label (char *dest_label, const char *sym_name, int num_idents)
3439 if (num_idents > 1 && has_name_equals)
3441 gfc_error ("Multiple identifiers provided with "
3442 "single NAME= specifier at %C");
3446 if (curr_binding_label[0] != '\0')
3448 /* Binding label given; store in temp holder til have sym. */
3449 strcpy (dest_label, curr_binding_label);
3453 /* No binding label given, and the NAME= specifier did not exist,
3454 which means there was no NAME="". */
3455 if (sym_name != NULL && has_name_equals == 0)
3456 strcpy (dest_label, sym_name);
3463 /* Set the status of the given common block as being BIND(C) or not,
3464 depending on the given parameter, is_bind_c. */
3467 set_com_block_bind_c (gfc_common_head *com_block, int is_bind_c)
3469 com_block->is_bind_c = is_bind_c;
3474 /* Verify that the given gfc_typespec is for a C interoperable type. */
3477 verify_c_interop (gfc_typespec *ts)
3479 if (ts->type == BT_DERIVED && ts->u.derived != NULL)
3480 return (ts->u.derived->ts.is_c_interop ? SUCCESS : FAILURE);
3481 else if (ts->is_c_interop != 1)
3488 /* Verify that the variables of a given common block, which has been
3489 defined with the attribute specifier bind(c), to be of a C
3490 interoperable type. Errors will be reported here, if
3494 verify_com_block_vars_c_interop (gfc_common_head *com_block)
3496 gfc_symbol *curr_sym = NULL;
3497 gfc_try retval = SUCCESS;
3499 curr_sym = com_block->head;
3501 /* Make sure we have at least one symbol. */
3502 if (curr_sym == NULL)
3505 /* Here we know we have a symbol, so we'll execute this loop
3509 /* The second to last param, 1, says this is in a common block. */
3510 retval = verify_bind_c_sym (curr_sym, &(curr_sym->ts), 1, com_block);
3511 curr_sym = curr_sym->common_next;
3512 } while (curr_sym != NULL);
3518 /* Verify that a given BIND(C) symbol is C interoperable. If it is not,
3519 an appropriate error message is reported. */
3522 verify_bind_c_sym (gfc_symbol *tmp_sym, gfc_typespec *ts,
3523 int is_in_common, gfc_common_head *com_block)
3525 bool bind_c_function = false;
3526 gfc_try retval = SUCCESS;
3528 if (tmp_sym->attr.function && tmp_sym->attr.is_bind_c)
3529 bind_c_function = true;
3531 if (tmp_sym->attr.function && tmp_sym->result != NULL)
3533 tmp_sym = tmp_sym->result;
3534 /* Make sure it wasn't an implicitly typed result. */
3535 if (tmp_sym->attr.implicit_type)
3537 gfc_warning ("Implicitly declared BIND(C) function '%s' at "
3538 "%L may not be C interoperable", tmp_sym->name,
3539 &tmp_sym->declared_at);
3540 tmp_sym->ts.f90_type = tmp_sym->ts.type;
3541 /* Mark it as C interoperable to prevent duplicate warnings. */
3542 tmp_sym->ts.is_c_interop = 1;
3543 tmp_sym->attr.is_c_interop = 1;
3547 /* Here, we know we have the bind(c) attribute, so if we have
3548 enough type info, then verify that it's a C interop kind.
3549 The info could be in the symbol already, or possibly still in
3550 the given ts (current_ts), so look in both. */
3551 if (tmp_sym->ts.type != BT_UNKNOWN || ts->type != BT_UNKNOWN)
3553 if (verify_c_interop (&(tmp_sym->ts)) != SUCCESS)
3555 /* See if we're dealing with a sym in a common block or not. */
3556 if (is_in_common == 1)
3558 gfc_warning ("Variable '%s' in common block '%s' at %L "
3559 "may not be a C interoperable "
3560 "kind though common block '%s' is BIND(C)",
3561 tmp_sym->name, com_block->name,
3562 &(tmp_sym->declared_at), com_block->name);
3566 if (tmp_sym->ts.type == BT_DERIVED || ts->type == BT_DERIVED)
3567 gfc_error ("Type declaration '%s' at %L is not C "
3568 "interoperable but it is BIND(C)",
3569 tmp_sym->name, &(tmp_sym->declared_at));
3571 gfc_warning ("Variable '%s' at %L "
3572 "may not be a C interoperable "
3573 "kind but it is bind(c)",
3574 tmp_sym->name, &(tmp_sym->declared_at));
3578 /* Variables declared w/in a common block can't be bind(c)
3579 since there's no way for C to see these variables, so there's
3580 semantically no reason for the attribute. */
3581 if (is_in_common == 1 && tmp_sym->attr.is_bind_c == 1)
3583 gfc_error ("Variable '%s' in common block '%s' at "
3584 "%L cannot be declared with BIND(C) "
3585 "since it is not a global",
3586 tmp_sym->name, com_block->name,
3587 &(tmp_sym->declared_at));
3591 /* Scalar variables that are bind(c) can not have the pointer
3592 or allocatable attributes. */
3593 if (tmp_sym->attr.is_bind_c == 1)
3595 if (tmp_sym->attr.pointer == 1)
3597 gfc_error ("Variable '%s' at %L cannot have both the "
3598 "POINTER and BIND(C) attributes",
3599 tmp_sym->name, &(tmp_sym->declared_at));
3603 if (tmp_sym->attr.allocatable == 1)
3605 gfc_error ("Variable '%s' at %L cannot have both the "
3606 "ALLOCATABLE and BIND(C) attributes",
3607 tmp_sym->name, &(tmp_sym->declared_at));
3613 /* If it is a BIND(C) function, make sure the return value is a
3614 scalar value. The previous tests in this function made sure
3615 the type is interoperable. */
3616 if (bind_c_function && tmp_sym->as != NULL)
3617 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3618 "be an array", tmp_sym->name, &(tmp_sym->declared_at));
3620 /* BIND(C) functions can not return a character string. */
3621 if (bind_c_function && tmp_sym->ts.type == BT_CHARACTER)
3622 if (tmp_sym->ts.u.cl == NULL || tmp_sym->ts.u.cl->length == NULL
3623 || tmp_sym->ts.u.cl->length->expr_type != EXPR_CONSTANT
3624 || mpz_cmp_si (tmp_sym->ts.u.cl->length->value.integer, 1) != 0)
3625 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3626 "be a character string", tmp_sym->name,
3627 &(tmp_sym->declared_at));
3630 /* See if the symbol has been marked as private. If it has, make sure
3631 there is no binding label and warn the user if there is one. */
3632 if (tmp_sym->attr.access == ACCESS_PRIVATE
3633 && tmp_sym->binding_label[0] != '\0')
3634 /* Use gfc_warning_now because we won't say that the symbol fails
3635 just because of this. */
3636 gfc_warning_now ("Symbol '%s' at %L is marked PRIVATE but has been "
3637 "given the binding label '%s'", tmp_sym->name,
3638 &(tmp_sym->declared_at), tmp_sym->binding_label);
3644 /* Set the appropriate fields for a symbol that's been declared as
3645 BIND(C) (the is_bind_c flag and the binding label), and verify that
3646 the type is C interoperable. Errors are reported by the functions
3647 used to set/test these fields. */
3650 set_verify_bind_c_sym (gfc_symbol *tmp_sym, int num_idents)
3652 gfc_try retval = SUCCESS;
3654 /* TODO: Do we need to make sure the vars aren't marked private? */
3656 /* Set the is_bind_c bit in symbol_attribute. */
3657 gfc_add_is_bind_c (&(tmp_sym->attr), tmp_sym->name, &gfc_current_locus, 0);
3659 if (set_binding_label (tmp_sym->binding_label, tmp_sym->name,
3660 num_idents) != SUCCESS)
3667 /* Set the fields marking the given common block as BIND(C), including
3668 a binding label, and report any errors encountered. */
3671 set_verify_bind_c_com_block (gfc_common_head *com_block, int num_idents)
3673 gfc_try retval = SUCCESS;
3675 /* destLabel, common name, typespec (which may have binding label). */
3676 if (set_binding_label (com_block->binding_label, com_block->name, num_idents)
3680 /* Set the given common block (com_block) to being bind(c) (1). */
3681 set_com_block_bind_c (com_block, 1);
3687 /* Retrieve the list of one or more identifiers that the given bind(c)
3688 attribute applies to. */
3691 get_bind_c_idents (void)
3693 char name[GFC_MAX_SYMBOL_LEN + 1];
3695 gfc_symbol *tmp_sym = NULL;
3697 gfc_common_head *com_block = NULL;
3699 if (gfc_match_name (name) == MATCH_YES)
3701 found_id = MATCH_YES;
3702 gfc_get_ha_symbol (name, &tmp_sym);
3704 else if (match_common_name (name) == MATCH_YES)
3706 found_id = MATCH_YES;
3707 com_block = gfc_get_common (name, 0);
3711 gfc_error ("Need either entity or common block name for "
3712 "attribute specification statement at %C");
3716 /* Save the current identifier and look for more. */
3719 /* Increment the number of identifiers found for this spec stmt. */
3722 /* Make sure we have a sym or com block, and verify that it can
3723 be bind(c). Set the appropriate field(s) and look for more
3725 if (tmp_sym != NULL || com_block != NULL)
3727 if (tmp_sym != NULL)
3729 if (set_verify_bind_c_sym (tmp_sym, num_idents)
3735 if (set_verify_bind_c_com_block(com_block, num_idents)
3740 /* Look to see if we have another identifier. */
3742 if (gfc_match_eos () == MATCH_YES)
3743 found_id = MATCH_NO;
3744 else if (gfc_match_char (',') != MATCH_YES)
3745 found_id = MATCH_NO;
3746 else if (gfc_match_name (name) == MATCH_YES)
3748 found_id = MATCH_YES;
3749 gfc_get_ha_symbol (name, &tmp_sym);
3751 else if (match_common_name (name) == MATCH_YES)
3753 found_id = MATCH_YES;
3754 com_block = gfc_get_common (name, 0);
3758 gfc_error ("Missing entity or common block name for "
3759 "attribute specification statement at %C");
3765 gfc_internal_error ("Missing symbol");
3767 } while (found_id == MATCH_YES);
3769 /* if we get here we were successful */
3774 /* Try and match a BIND(C) attribute specification statement. */
3777 gfc_match_bind_c_stmt (void)
3779 match found_match = MATCH_NO;
3784 /* This may not be necessary. */
3786 /* Clear the temporary binding label holder. */
3787 curr_binding_label[0] = '\0';
3789 /* Look for the bind(c). */
3790 found_match = gfc_match_bind_c (NULL, true);
3792 if (found_match == MATCH_YES)
3794 /* Look for the :: now, but it is not required. */
3797 /* Get the identifier(s) that needs to be updated. This may need to
3798 change to hand the flag(s) for the attr specified so all identifiers
3799 found can have all appropriate parts updated (assuming that the same
3800 spec stmt can have multiple attrs, such as both bind(c) and
3802 if (get_bind_c_idents () != SUCCESS)
3803 /* Error message should have printed already. */
3811 /* Match a data declaration statement. */
3814 gfc_match_data_decl (void)
3820 num_idents_on_line = 0;
3822 m = gfc_match_decl_type_spec (¤t_ts, 0);
3826 if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS)
3827 && gfc_current_state () != COMP_DERIVED)
3829 sym = gfc_use_derived (current_ts.u.derived);
3837 current_ts.u.derived = sym;
3840 m = match_attr_spec ();
3841 if (m == MATCH_ERROR)
3847 if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS)
3848 && current_ts.u.derived->components == NULL
3849 && !current_ts.u.derived->attr.zero_comp)
3852 if (current_attr.pointer && gfc_current_state () == COMP_DERIVED)
3855 gfc_find_symbol (current_ts.u.derived->name,
3856 current_ts.u.derived->ns->parent, 1, &sym);
3858 /* Any symbol that we find had better be a type definition
3859 which has its components defined. */
3860 if (sym != NULL && sym->attr.flavor == FL_DERIVED
3861 && (current_ts.u.derived->components != NULL
3862 || current_ts.u.derived->attr.zero_comp))
3865 /* Now we have an error, which we signal, and then fix up
3866 because the knock-on is plain and simple confusing. */
3867 gfc_error_now ("Derived type at %C has not been previously defined "
3868 "and so cannot appear in a derived type definition");
3869 current_attr.pointer = 1;
3874 /* If we have an old-style character declaration, and no new-style
3875 attribute specifications, then there a comma is optional between
3876 the type specification and the variable list. */
3877 if (m == MATCH_NO && current_ts.type == BT_CHARACTER && old_char_selector)
3878 gfc_match_char (',');
3880 /* Give the types/attributes to symbols that follow. Give the element
3881 a number so that repeat character length expressions can be copied. */
3885 num_idents_on_line++;
3886 m = variable_decl (elem++);
3887 if (m == MATCH_ERROR)
3892 if (gfc_match_eos () == MATCH_YES)
3894 if (gfc_match_char (',') != MATCH_YES)
3898 if (gfc_error_flag_test () == 0)
3899 gfc_error ("Syntax error in data declaration at %C");
3902 gfc_free_data_all (gfc_current_ns);
3905 gfc_free_array_spec (current_as);
3911 /* Match a prefix associated with a function or subroutine
3912 declaration. If the typespec pointer is nonnull, then a typespec
3913 can be matched. Note that if nothing matches, MATCH_YES is
3914 returned (the null string was matched). */
3917 gfc_match_prefix (gfc_typespec *ts)
3921 gfc_clear_attr (¤t_attr);
3924 gcc_assert (!gfc_matching_prefix);
3925 gfc_matching_prefix = true;
3928 if (!seen_type && ts != NULL
3929 && gfc_match_decl_type_spec (ts, 0) == MATCH_YES
3930 && gfc_match_space () == MATCH_YES)
3937 if (gfc_match ("elemental% ") == MATCH_YES)
3939 if (gfc_add_elemental (¤t_attr, NULL) == FAILURE)
3945 if (gfc_match ("pure% ") == MATCH_YES)
3947 if (gfc_add_pure (¤t_attr, NULL) == FAILURE)
3953 if (gfc_match ("recursive% ") == MATCH_YES)
3955 if (gfc_add_recursive (¤t_attr, NULL) == FAILURE)
3961 /* At this point, the next item is not a prefix. */
3962 gcc_assert (gfc_matching_prefix);
3963 gfc_matching_prefix = false;
3967 gcc_assert (gfc_matching_prefix);
3968 gfc_matching_prefix = false;
3973 /* Copy attributes matched by gfc_match_prefix() to attributes on a symbol. */
3976 copy_prefix (symbol_attribute *dest, locus *where)
3978 if (current_attr.pure && gfc_add_pure (dest, where) == FAILURE)
3981 if (current_attr.elemental && gfc_add_elemental (dest, where) == FAILURE)
3984 if (current_attr.recursive && gfc_add_recursive (dest, where) == FAILURE)
3991 /* Match a formal argument list. */
3994 gfc_match_formal_arglist (gfc_symbol *progname, int st_flag, int null_flag)
3996 gfc_formal_arglist *head, *tail, *p, *q;
3997 char name[GFC_MAX_SYMBOL_LEN + 1];
4003 if (gfc_match_char ('(') != MATCH_YES)
4010 if (gfc_match_char (')') == MATCH_YES)
4015 if (gfc_match_char ('*') == MATCH_YES)
4019 m = gfc_match_name (name);
4023 if (gfc_get_symbol (name, NULL, &sym))
4027 p = gfc_get_formal_arglist ();
4039 /* We don't add the VARIABLE flavor because the name could be a
4040 dummy procedure. We don't apply these attributes to formal
4041 arguments of statement functions. */
4042 if (sym != NULL && !st_flag
4043 && (gfc_add_dummy (&sym->attr, sym->name, NULL) == FAILURE
4044 || gfc_missing_attr (&sym->attr, NULL) == FAILURE))
4050 /* The name of a program unit can be in a different namespace,
4051 so check for it explicitly. After the statement is accepted,
4052 the name is checked for especially in gfc_get_symbol(). */
4053 if (gfc_new_block != NULL && sym != NULL
4054 && strcmp (sym->name, gfc_new_block->name) == 0)
4056 gfc_error ("Name '%s' at %C is the name of the procedure",
4062 if (gfc_match_char (')') == MATCH_YES)
4065 m = gfc_match_char (',');
4068 gfc_error ("Unexpected junk in formal argument list at %C");
4074 /* Check for duplicate symbols in the formal argument list. */
4077 for (p = head; p->next; p = p->next)
4082 for (q = p->next; q; q = q->next)
4083 if (p->sym == q->sym)
4085 gfc_error ("Duplicate symbol '%s' in formal argument list "
4086 "at %C", p->sym->name);
4094 if (gfc_add_explicit_interface (progname, IFSRC_DECL, head, NULL)
4104 gfc_free_formal_arglist (head);
4109 /* Match a RESULT specification following a function declaration or
4110 ENTRY statement. Also matches the end-of-statement. */
4113 match_result (gfc_symbol *function, gfc_symbol **result)
4115 char name[GFC_MAX_SYMBOL_LEN + 1];
4119 if (gfc_match (" result (") != MATCH_YES)
4122 m = gfc_match_name (name);
4126 /* Get the right paren, and that's it because there could be the
4127 bind(c) attribute after the result clause. */
4128 if (gfc_match_char(')') != MATCH_YES)
4130 /* TODO: should report the missing right paren here. */
4134 if (strcmp (function->name, name) == 0)
4136 gfc_error ("RESULT variable at %C must be different than function name");
4140 if (gfc_get_symbol (name, NULL, &r))
4143 if (gfc_add_result (&r->attr, r->name, NULL) == FAILURE)
4152 /* Match a function suffix, which could be a combination of a result
4153 clause and BIND(C), either one, or neither. The draft does not
4154 require them to come in a specific order. */
4157 gfc_match_suffix (gfc_symbol *sym, gfc_symbol **result)
4159 match is_bind_c; /* Found bind(c). */
4160 match is_result; /* Found result clause. */
4161 match found_match; /* Status of whether we've found a good match. */
4162 char peek_char; /* Character we're going to peek at. */
4163 bool allow_binding_name;
4165 /* Initialize to having found nothing. */
4166 found_match = MATCH_NO;
4167 is_bind_c = MATCH_NO;
4168 is_result = MATCH_NO;
4170 /* Get the next char to narrow between result and bind(c). */
4171 gfc_gobble_whitespace ();
4172 peek_char = gfc_peek_ascii_char ();
4174 /* C binding names are not allowed for internal procedures. */
4175 if (gfc_current_state () == COMP_CONTAINS
4176 && sym->ns->proc_name->attr.flavor != FL_MODULE)
4177 allow_binding_name = false;
4179 allow_binding_name = true;
4184 /* Look for result clause. */
4185 is_result = match_result (sym, result);
4186 if (is_result == MATCH_YES)
4188 /* Now see if there is a bind(c) after it. */
4189 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
4190 /* We've found the result clause and possibly bind(c). */
4191 found_match = MATCH_YES;
4194 /* This should only be MATCH_ERROR. */
4195 found_match = is_result;
4198 /* Look for bind(c) first. */
4199 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
4200 if (is_bind_c == MATCH_YES)
4202 /* Now see if a result clause followed it. */
4203 is_result = match_result (sym, result);
4204 found_match = MATCH_YES;
4208 /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */
4209 found_match = MATCH_ERROR;
4213 gfc_error ("Unexpected junk after function declaration at %C");
4214 found_match = MATCH_ERROR;
4218 if (is_bind_c == MATCH_YES)
4220 /* Fortran 2008 draft allows BIND(C) for internal procedures. */
4221 if (gfc_current_state () == COMP_CONTAINS
4222 && sym->ns->proc_name->attr.flavor != FL_MODULE
4223 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute "
4224 "at %L may not be specified for an internal "
4225 "procedure", &gfc_current_locus)
4229 if (gfc_add_is_bind_c (&(sym->attr), sym->name, &gfc_current_locus, 1)
4238 /* Procedure pointer return value without RESULT statement:
4239 Add "hidden" result variable named "ppr@". */
4242 add_hidden_procptr_result (gfc_symbol *sym)
4246 if (gfc_notification_std (GFC_STD_F2003) == ERROR)
4249 /* First usage case: PROCEDURE and EXTERNAL statements. */
4250 case1 = gfc_current_state () == COMP_FUNCTION && gfc_current_block ()
4251 && strcmp (gfc_current_block ()->name, sym->name) == 0
4252 && sym->attr.external;
4253 /* Second usage case: INTERFACE statements. */
4254 case2 = gfc_current_state () == COMP_INTERFACE && gfc_state_stack->previous
4255 && gfc_state_stack->previous->state == COMP_FUNCTION
4256 && strcmp (gfc_state_stack->previous->sym->name, sym->name) == 0;
4262 gfc_get_sym_tree ("ppr@", gfc_current_ns, &stree, false);
4266 gfc_get_sym_tree ("ppr@", gfc_current_ns->parent, &stree, false);
4267 st2 = gfc_new_symtree (&gfc_current_ns->sym_root, "ppr@");
4268 st2->n.sym = stree->n.sym;
4270 sym->result = stree->n.sym;
4272 sym->result->attr.proc_pointer = sym->attr.proc_pointer;
4273 sym->result->attr.pointer = sym->attr.pointer;
4274 sym->result->attr.external = sym->attr.external;
4275 sym->result->attr.referenced = sym->attr.referenced;
4276 sym->result->ts = sym->ts;
4277 sym->attr.proc_pointer = 0;
4278 sym->attr.pointer = 0;
4279 sym->attr.external = 0;
4280 if (sym->result->attr.external && sym->result->attr.pointer)
4282 sym->result->attr.pointer = 0;
4283 sym->result->attr.proc_pointer = 1;
4286 return gfc_add_result (&sym->result->attr, sym->result->name, NULL);
4288 /* POINTER after PROCEDURE/EXTERNAL/INTERFACE statement. */
4289 else if (sym->attr.function && !sym->attr.external && sym->attr.pointer
4290 && sym->result && sym->result != sym && sym->result->attr.external
4291 && sym == gfc_current_ns->proc_name
4292 && sym == sym->result->ns->proc_name
4293 && strcmp ("ppr@", sym->result->name) == 0)
4295 sym->result->attr.proc_pointer = 1;
4296 sym->attr.pointer = 0;
4304 /* Match the interface for a PROCEDURE declaration,
4305 including brackets (R1212). */
4308 match_procedure_interface (gfc_symbol **proc_if)
4312 locus old_loc, entry_loc;
4313 gfc_namespace *old_ns = gfc_current_ns;
4314 char name[GFC_MAX_SYMBOL_LEN + 1];
4316 old_loc = entry_loc = gfc_current_locus;
4317 gfc_clear_ts (¤t_ts);
4319 if (gfc_match (" (") != MATCH_YES)
4321 gfc_current_locus = entry_loc;
4325 /* Get the type spec. for the procedure interface. */
4326 old_loc = gfc_current_locus;
4327 m = gfc_match_decl_type_spec (¤t_ts, 0);
4328 gfc_gobble_whitespace ();
4329 if (m == MATCH_YES || (m == MATCH_NO && gfc_peek_ascii_char () == ')'))
4332 if (m == MATCH_ERROR)
4335 /* Procedure interface is itself a procedure. */
4336 gfc_current_locus = old_loc;
4337 m = gfc_match_name (name);
4339 /* First look to see if it is already accessible in the current
4340 namespace because it is use associated or contained. */
4342 if (gfc_find_sym_tree (name, NULL, 0, &st))
4345 /* If it is still not found, then try the parent namespace, if it
4346 exists and create the symbol there if it is still not found. */
4347 if (gfc_current_ns->parent)
4348 gfc_current_ns = gfc_current_ns->parent;
4349 if (st == NULL && gfc_get_ha_sym_tree (name, &st))
4352 gfc_current_ns = old_ns;
4353 *proc_if = st->n.sym;
4355 /* Various interface checks. */
4359 /* Resolve interface if possible. That way, attr.procedure is only set
4360 if it is declared by a later procedure-declaration-stmt, which is
4361 invalid per C1212. */
4362 while ((*proc_if)->ts.interface)
4363 *proc_if = (*proc_if)->ts.interface;
4365 if ((*proc_if)->generic)
4367 gfc_error ("Interface '%s' at %C may not be generic",
4371 if ((*proc_if)->attr.proc == PROC_ST_FUNCTION)
4373 gfc_error ("Interface '%s' at %C may not be a statement function",
4377 /* Handle intrinsic procedures. */
4378 if (!((*proc_if)->attr.external || (*proc_if)->attr.use_assoc
4379 || (*proc_if)->attr.if_source == IFSRC_IFBODY)
4380 && (gfc_is_intrinsic ((*proc_if), 0, gfc_current_locus)
4381 || gfc_is_intrinsic ((*proc_if), 1, gfc_current_locus)))
4382 (*proc_if)->attr.intrinsic = 1;
4383 if ((*proc_if)->attr.intrinsic
4384 && !gfc_intrinsic_actual_ok ((*proc_if)->name, 0))
4386 gfc_error ("Intrinsic procedure '%s' not allowed "
4387 "in PROCEDURE statement at %C", (*proc_if)->name);
4393 if (gfc_match (" )") != MATCH_YES)
4395 gfc_current_locus = entry_loc;
4403 /* Match a PROCEDURE declaration (R1211). */
4406 match_procedure_decl (void)
4409 gfc_symbol *sym, *proc_if = NULL;
4411 gfc_expr *initializer = NULL;
4413 /* Parse interface (with brackets). */
4414 m = match_procedure_interface (&proc_if);
4418 /* Parse attributes (with colons). */
4419 m = match_attr_spec();
4420 if (m == MATCH_ERROR)
4423 /* Get procedure symbols. */
4426 m = gfc_match_symbol (&sym, 0);
4429 else if (m == MATCH_ERROR)
4432 /* Add current_attr to the symbol attributes. */
4433 if (gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE)
4436 if (sym->attr.is_bind_c)
4438 /* Check for C1218. */
4439 if (!proc_if || !proc_if->attr.is_bind_c)
4441 gfc_error ("BIND(C) attribute at %C requires "
4442 "an interface with BIND(C)");
4445 /* Check for C1217. */
4446 if (has_name_equals && sym->attr.pointer)
4448 gfc_error ("BIND(C) procedure with NAME may not have "
4449 "POINTER attribute at %C");
4452 if (has_name_equals && sym->attr.dummy)
4454 gfc_error ("Dummy procedure at %C may not have "
4455 "BIND(C) attribute with NAME");
4458 /* Set binding label for BIND(C). */
4459 if (set_binding_label (sym->binding_label, sym->name, num) != SUCCESS)
4463 if (gfc_add_external (&sym->attr, NULL) == FAILURE)
4466 if (add_hidden_procptr_result (sym) == SUCCESS)
4469 if (gfc_add_proc (&sym->attr, sym->name, NULL) == FAILURE)
4472 /* Set interface. */
4473 if (proc_if != NULL)
4475 if (sym->ts.type != BT_UNKNOWN)
4477 gfc_error ("Procedure '%s' at %L already has basic type of %s",
4478 sym->name, &gfc_current_locus,
4479 gfc_basic_typename (sym->ts.type));
4482 sym->ts.interface = proc_if;
4483 sym->attr.untyped = 1;
4484 sym->attr.if_source = IFSRC_IFBODY;
4486 else if (current_ts.type != BT_UNKNOWN)
4488 if (gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE)
4490 sym->ts.interface = gfc_new_symbol ("", gfc_current_ns);
4491 sym->ts.interface->ts = current_ts;
4492 sym->ts.interface->attr.function = 1;
4493 sym->attr.function = sym->ts.interface->attr.function;
4494 sym->attr.if_source = IFSRC_UNKNOWN;
4497 if (gfc_match (" =>") == MATCH_YES)
4499 if (!current_attr.pointer)
4501 gfc_error ("Initialization at %C isn't for a pointer variable");
4506 m = gfc_match_null (&initializer);
4509 gfc_error ("Pointer initialization requires a NULL() at %C");
4513 if (gfc_pure (NULL))
4515 gfc_error ("Initialization of pointer at %C is not allowed in "
4516 "a PURE procedure");
4523 if (add_init_expr_to_sym (sym->name, &initializer, &gfc_current_locus)
4529 gfc_set_sym_referenced (sym);
4531 if (gfc_match_eos () == MATCH_YES)
4533 if (gfc_match_char (',') != MATCH_YES)
4538 gfc_error ("Syntax error in PROCEDURE statement at %C");
4542 /* Free stuff up and return. */
4543 gfc_free_expr (initializer);
4549 match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc);
4552 /* Match a procedure pointer component declaration (R445). */
4555 match_ppc_decl (void)
4558 gfc_symbol *proc_if = NULL;
4562 gfc_expr *initializer = NULL;
4563 gfc_typebound_proc* tb;
4564 char name[GFC_MAX_SYMBOL_LEN + 1];
4566 /* Parse interface (with brackets). */
4567 m = match_procedure_interface (&proc_if);
4571 /* Parse attributes. */
4572 tb = XCNEW (gfc_typebound_proc);
4573 tb->where = gfc_current_locus;
4574 m = match_binding_attributes (tb, false, true);
4575 if (m == MATCH_ERROR)
4578 gfc_clear_attr (¤t_attr);
4579 current_attr.procedure = 1;
4580 current_attr.proc_pointer = 1;
4581 current_attr.access = tb->access;
4582 current_attr.flavor = FL_PROCEDURE;
4584 /* Match the colons (required). */
4585 if (gfc_match (" ::") != MATCH_YES)
4587 gfc_error ("Expected '::' after binding-attributes at %C");
4591 /* Check for C450. */
4592 if (!tb->nopass && proc_if == NULL)
4594 gfc_error("NOPASS or explicit interface required at %C");
4598 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Procedure pointer "
4599 "component at %C") == FAILURE)
4602 /* Match PPC names. */
4606 m = gfc_match_name (name);
4609 else if (m == MATCH_ERROR)
4612 if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE)
4615 /* Add current_attr to the symbol attributes. */
4616 if (gfc_copy_attr (&c->attr, ¤t_attr, NULL) == FAILURE)
4619 if (gfc_add_external (&c->attr, NULL) == FAILURE)
4622 if (gfc_add_proc (&c->attr, name, NULL) == FAILURE)
4627 /* Set interface. */
4628 if (proc_if != NULL)
4630 c->ts.interface = proc_if;
4631 c->attr.untyped = 1;
4632 c->attr.if_source = IFSRC_IFBODY;
4634 else if (ts.type != BT_UNKNOWN)
4637 c->ts.interface = gfc_new_symbol ("", gfc_current_ns);
4638 c->ts.interface->ts = ts;
4639 c->ts.interface->attr.function = 1;
4640 c->attr.function = c->ts.interface->attr.function;
4641 c->attr.if_source = IFSRC_UNKNOWN;
4644 if (gfc_match (" =>") == MATCH_YES)
4646 m = gfc_match_null (&initializer);
4649 gfc_error ("Pointer initialization requires a NULL() at %C");
4652 if (gfc_pure (NULL))
4654 gfc_error ("Initialization of pointer at %C is not allowed in "
4655 "a PURE procedure");
4660 gfc_free_expr (initializer);
4663 c->initializer = initializer;
4666 if (gfc_match_eos () == MATCH_YES)
4668 if (gfc_match_char (',') != MATCH_YES)
4673 gfc_error ("Syntax error in procedure pointer component at %C");
4678 /* Match a PROCEDURE declaration inside an interface (R1206). */
4681 match_procedure_in_interface (void)
4685 char name[GFC_MAX_SYMBOL_LEN + 1];
4687 if (current_interface.type == INTERFACE_NAMELESS
4688 || current_interface.type == INTERFACE_ABSTRACT)
4690 gfc_error ("PROCEDURE at %C must be in a generic interface");
4696 m = gfc_match_name (name);
4699 else if (m == MATCH_ERROR)
4701 if (gfc_get_symbol (name, gfc_current_ns->parent, &sym))
4704 if (gfc_add_interface (sym) == FAILURE)
4707 if (gfc_match_eos () == MATCH_YES)
4709 if (gfc_match_char (',') != MATCH_YES)
4716 gfc_error ("Syntax error in PROCEDURE statement at %C");
4721 /* General matcher for PROCEDURE declarations. */
4723 static match match_procedure_in_type (void);
4726 gfc_match_procedure (void)
4730 switch (gfc_current_state ())
4735 case COMP_SUBROUTINE:
4737 m = match_procedure_decl ();
4739 case COMP_INTERFACE:
4740 m = match_procedure_in_interface ();
4743 m = match_ppc_decl ();
4745 case COMP_DERIVED_CONTAINS:
4746 m = match_procedure_in_type ();
4755 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROCEDURE statement at %C")
4763 /* Warn if a matched procedure has the same name as an intrinsic; this is
4764 simply a wrapper around gfc_warn_intrinsic_shadow that interprets the current
4765 parser-state-stack to find out whether we're in a module. */
4768 warn_intrinsic_shadow (const gfc_symbol* sym, bool func)
4772 in_module = (gfc_state_stack->previous
4773 && gfc_state_stack->previous->state == COMP_MODULE);
4775 gfc_warn_intrinsic_shadow (sym, in_module, func);
4779 /* Match a function declaration. */
4782 gfc_match_function_decl (void)
4784 char name[GFC_MAX_SYMBOL_LEN + 1];
4785 gfc_symbol *sym, *result;
4789 match found_match; /* Status returned by match func. */
4791 if (gfc_current_state () != COMP_NONE
4792 && gfc_current_state () != COMP_INTERFACE
4793 && gfc_current_state () != COMP_CONTAINS)
4796 gfc_clear_ts (¤t_ts);
4798 old_loc = gfc_current_locus;
4800 m = gfc_match_prefix (¤t_ts);
4803 gfc_current_locus = old_loc;
4807 if (gfc_match ("function% %n", name) != MATCH_YES)
4809 gfc_current_locus = old_loc;
4812 if (get_proc_name (name, &sym, false))
4815 if (add_hidden_procptr_result (sym) == SUCCESS)
4818 gfc_new_block = sym;
4820 m = gfc_match_formal_arglist (sym, 0, 0);
4823 gfc_error ("Expected formal argument list in function "
4824 "definition at %C");
4828 else if (m == MATCH_ERROR)
4833 /* According to the draft, the bind(c) and result clause can
4834 come in either order after the formal_arg_list (i.e., either
4835 can be first, both can exist together or by themselves or neither
4836 one). Therefore, the match_result can't match the end of the
4837 string, and check for the bind(c) or result clause in either order. */
4838 found_match = gfc_match_eos ();
4840 /* Make sure that it isn't already declared as BIND(C). If it is, it
4841 must have been marked BIND(C) with a BIND(C) attribute and that is
4842 not allowed for procedures. */
4843 if (sym->attr.is_bind_c == 1)
4845 sym->attr.is_bind_c = 0;
4846 if (sym->old_symbol != NULL)
4847 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4848 "variables or common blocks",
4849 &(sym->old_symbol->declared_at));
4851 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4852 "variables or common blocks", &gfc_current_locus);
4855 if (found_match != MATCH_YES)
4857 /* If we haven't found the end-of-statement, look for a suffix. */
4858 suffix_match = gfc_match_suffix (sym, &result);
4859 if (suffix_match == MATCH_YES)
4860 /* Need to get the eos now. */
4861 found_match = gfc_match_eos ();
4863 found_match = suffix_match;
4866 if(found_match != MATCH_YES)
4870 /* Make changes to the symbol. */
4873 if (gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE)
4876 if (gfc_missing_attr (&sym->attr, NULL) == FAILURE
4877 || copy_prefix (&sym->attr, &sym->declared_at) == FAILURE)
4880 /* Delay matching the function characteristics until after the
4881 specification block by signalling kind=-1. */
4882 sym->declared_at = old_loc;
4883 if (current_ts.type != BT_UNKNOWN)
4884 current_ts.kind = -1;
4886 current_ts.kind = 0;
4890 if (current_ts.type != BT_UNKNOWN
4891 && gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE)
4897 if (current_ts.type != BT_UNKNOWN
4898 && gfc_add_type (result, ¤t_ts, &gfc_current_locus)
4901 sym->result = result;
4904 /* Warn if this procedure has the same name as an intrinsic. */
4905 warn_intrinsic_shadow (sym, true);
4911 gfc_current_locus = old_loc;
4916 /* This is mostly a copy of parse.c(add_global_procedure) but modified to
4917 pass the name of the entry, rather than the gfc_current_block name, and
4918 to return false upon finding an existing global entry. */
4921 add_global_entry (const char *name, int sub)
4924 enum gfc_symbol_type type;
4926 s = gfc_get_gsymbol(name);
4927 type = sub ? GSYM_SUBROUTINE : GSYM_FUNCTION;
4930 || (s->type != GSYM_UNKNOWN
4931 && s->type != type))
4932 gfc_global_used(s, NULL);
4936 s->where = gfc_current_locus;
4938 s->ns = gfc_current_ns;
4945 /* Match an ENTRY statement. */
4948 gfc_match_entry (void)
4953 char name[GFC_MAX_SYMBOL_LEN + 1];
4954 gfc_compile_state state;
4958 bool module_procedure;
4962 m = gfc_match_name (name);
4966 if (gfc_notify_std (GFC_STD_F2008_OBS, "Fortran 2008 obsolescent feature: "
4967 "ENTRY statement at %C") == FAILURE)
4970 state = gfc_current_state ();
4971 if (state != COMP_SUBROUTINE && state != COMP_FUNCTION)
4976 gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM");
4979 gfc_error ("ENTRY statement at %C cannot appear within a MODULE");
4981 case COMP_BLOCK_DATA:
4982 gfc_error ("ENTRY statement at %C cannot appear within "
4985 case COMP_INTERFACE:
4986 gfc_error ("ENTRY statement at %C cannot appear within "
4990 gfc_error ("ENTRY statement at %C cannot appear within "
4991 "a DERIVED TYPE block");
4994 gfc_error ("ENTRY statement at %C cannot appear within "
4995 "an IF-THEN block");
4998 gfc_error ("ENTRY statement at %C cannot appear within "
5002 gfc_error ("ENTRY statement at %C cannot appear within "
5006 gfc_error ("ENTRY statement at %C cannot appear within "
5010 gfc_error ("ENTRY statement at %C cannot appear within "
5014 gfc_error ("ENTRY statement at %C cannot appear within "
5015 "a contained subprogram");
5018 gfc_internal_error ("gfc_match_entry(): Bad state");
5023 module_procedure = gfc_current_ns->parent != NULL
5024 && gfc_current_ns->parent->proc_name
5025 && gfc_current_ns->parent->proc_name->attr.flavor
5028 if (gfc_current_ns->parent != NULL
5029 && gfc_current_ns->parent->proc_name
5030 && !module_procedure)
5032 gfc_error("ENTRY statement at %C cannot appear in a "
5033 "contained procedure");
5037 /* Module function entries need special care in get_proc_name
5038 because previous references within the function will have
5039 created symbols attached to the current namespace. */
5040 if (get_proc_name (name, &entry,
5041 gfc_current_ns->parent != NULL
5042 && module_procedure))
5045 proc = gfc_current_block ();
5047 /* Make sure that it isn't already declared as BIND(C). If it is, it
5048 must have been marked BIND(C) with a BIND(C) attribute and that is
5049 not allowed for procedures. */
5050 if (entry->attr.is_bind_c == 1)
5052 entry->attr.is_bind_c = 0;
5053 if (entry->old_symbol != NULL)
5054 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5055 "variables or common blocks",
5056 &(entry->old_symbol->declared_at));
5058 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5059 "variables or common blocks", &gfc_current_locus);
5062 /* Check what next non-whitespace character is so we can tell if there
5063 is the required parens if we have a BIND(C). */
5064 gfc_gobble_whitespace ();
5065 peek_char = gfc_peek_ascii_char ();
5067 if (state == COMP_SUBROUTINE)
5069 /* An entry in a subroutine. */
5070 if (!gfc_current_ns->parent && !add_global_entry (name, 1))
5073 m = gfc_match_formal_arglist (entry, 0, 1);
5077 /* Call gfc_match_bind_c with allow_binding_name = true as ENTRY can
5078 never be an internal procedure. */
5079 is_bind_c = gfc_match_bind_c (entry, true);
5080 if (is_bind_c == MATCH_ERROR)
5082 if (is_bind_c == MATCH_YES)
5084 if (peek_char != '(')
5086 gfc_error ("Missing required parentheses before BIND(C) at %C");
5089 if (gfc_add_is_bind_c (&(entry->attr), entry->name, &(entry->declared_at), 1)
5094 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
5095 || gfc_add_subroutine (&entry->attr, entry->name, NULL) == FAILURE)
5100 /* An entry in a function.
5101 We need to take special care because writing
5106 ENTRY f() RESULT (r)
5108 ENTRY f RESULT (r). */
5109 if (!gfc_current_ns->parent && !add_global_entry (name, 0))
5112 old_loc = gfc_current_locus;
5113 if (gfc_match_eos () == MATCH_YES)
5115 gfc_current_locus = old_loc;
5116 /* Match the empty argument list, and add the interface to
5118 m = gfc_match_formal_arglist (entry, 0, 1);
5121 m = gfc_match_formal_arglist (entry, 0, 0);
5128 if (gfc_match_eos () == MATCH_YES)
5130 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
5131 || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE)
5134 entry->result = entry;
5138 m = gfc_match_suffix (entry, &result);
5140 gfc_syntax_error (ST_ENTRY);
5146 if (gfc_add_result (&result->attr, result->name, NULL) == FAILURE
5147 || gfc_add_entry (&entry->attr, result->name, NULL) == FAILURE
5148 || gfc_add_function (&entry->attr, result->name, NULL)
5151 entry->result = result;
5155 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
5156 || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE)
5158 entry->result = entry;
5163 if (gfc_match_eos () != MATCH_YES)
5165 gfc_syntax_error (ST_ENTRY);
5169 entry->attr.recursive = proc->attr.recursive;
5170 entry->attr.elemental = proc->attr.elemental;
5171 entry->attr.pure = proc->attr.pure;
5173 el = gfc_get_entry_list ();
5175 el->next = gfc_current_ns->entries;
5176 gfc_current_ns->entries = el;
5178 el->id = el->next->id + 1;
5182 new_st.op = EXEC_ENTRY;
5183 new_st.ext.entry = el;
5189 /* Match a subroutine statement, including optional prefixes. */
5192 gfc_match_subroutine (void)
5194 char name[GFC_MAX_SYMBOL_LEN + 1];
5199 bool allow_binding_name;
5201 if (gfc_current_state () != COMP_NONE
5202 && gfc_current_state () != COMP_INTERFACE
5203 && gfc_current_state () != COMP_CONTAINS)
5206 m = gfc_match_prefix (NULL);
5210 m = gfc_match ("subroutine% %n", name);
5214 if (get_proc_name (name, &sym, false))
5217 /* Set declared_at as it might point to, e.g., a PUBLIC statement, if
5218 the symbol existed before. */
5219 sym->declared_at = gfc_current_locus;
5221 if (add_hidden_procptr_result (sym) == SUCCESS)
5224 gfc_new_block = sym;
5226 /* Check what next non-whitespace character is so we can tell if there
5227 is the required parens if we have a BIND(C). */
5228 gfc_gobble_whitespace ();
5229 peek_char = gfc_peek_ascii_char ();
5231 if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE)
5234 if (gfc_match_formal_arglist (sym, 0, 1) != MATCH_YES)
5237 /* Make sure that it isn't already declared as BIND(C). If it is, it
5238 must have been marked BIND(C) with a BIND(C) attribute and that is
5239 not allowed for procedures. */
5240 if (sym->attr.is_bind_c == 1)
5242 sym->attr.is_bind_c = 0;
5243 if (sym->old_symbol != NULL)
5244 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5245 "variables or common blocks",
5246 &(sym->old_symbol->declared_at));
5248 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5249 "variables or common blocks", &gfc_current_locus);
5252 /* C binding names are not allowed for internal procedures. */
5253 if (gfc_current_state () == COMP_CONTAINS
5254 && sym->ns->proc_name->attr.flavor != FL_MODULE)
5255 allow_binding_name = false;
5257 allow_binding_name = true;
5259 /* Here, we are just checking if it has the bind(c) attribute, and if
5260 so, then we need to make sure it's all correct. If it doesn't,
5261 we still need to continue matching the rest of the subroutine line. */
5262 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
5263 if (is_bind_c == MATCH_ERROR)
5265 /* There was an attempt at the bind(c), but it was wrong. An
5266 error message should have been printed w/in the gfc_match_bind_c
5267 so here we'll just return the MATCH_ERROR. */
5271 if (is_bind_c == MATCH_YES)
5273 /* The following is allowed in the Fortran 2008 draft. */
5274 if (gfc_current_state () == COMP_CONTAINS
5275 && sym->ns->proc_name->attr.flavor != FL_MODULE
5276 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute "
5277 "at %L may not be specified for an internal "
5278 "procedure", &gfc_current_locus)
5282 if (peek_char != '(')
5284 gfc_error ("Missing required parentheses before BIND(C) at %C");
5287 if (gfc_add_is_bind_c (&(sym->attr), sym->name, &(sym->declared_at), 1)
5292 if (gfc_match_eos () != MATCH_YES)
5294 gfc_syntax_error (ST_SUBROUTINE);
5298 if (copy_prefix (&sym->attr, &sym->declared_at) == FAILURE)
5301 /* Warn if it has the same name as an intrinsic. */
5302 warn_intrinsic_shadow (sym, false);
5308 /* Match a BIND(C) specifier, with the optional 'name=' specifier if
5309 given, and set the binding label in either the given symbol (if not
5310 NULL), or in the current_ts. The symbol may be NULL because we may
5311 encounter the BIND(C) before the declaration itself. Return
5312 MATCH_NO if what we're looking at isn't a BIND(C) specifier,
5313 MATCH_ERROR if it is a BIND(C) clause but an error was encountered,
5314 or MATCH_YES if the specifier was correct and the binding label and
5315 bind(c) fields were set correctly for the given symbol or the
5316 current_ts. If allow_binding_name is false, no binding name may be
5320 gfc_match_bind_c (gfc_symbol *sym, bool allow_binding_name)
5322 /* binding label, if exists */
5323 char binding_label[GFC_MAX_SYMBOL_LEN + 1];
5327 /* Initialize the flag that specifies whether we encountered a NAME=
5328 specifier or not. */
5329 has_name_equals = 0;
5331 /* Init the first char to nil so we can catch if we don't have
5332 the label (name attr) or the symbol name yet. */
5333 binding_label[0] = '\0';
5335 /* This much we have to be able to match, in this order, if
5336 there is a bind(c) label. */
5337 if (gfc_match (" bind ( c ") != MATCH_YES)
5340 /* Now see if there is a binding label, or if we've reached the
5341 end of the bind(c) attribute without one. */
5342 if (gfc_match_char (',') == MATCH_YES)
5344 if (gfc_match (" name = ") != MATCH_YES)
5346 gfc_error ("Syntax error in NAME= specifier for binding label "
5348 /* should give an error message here */
5352 has_name_equals = 1;
5354 /* Get the opening quote. */
5355 double_quote = MATCH_YES;
5356 single_quote = MATCH_YES;
5357 double_quote = gfc_match_char ('"');
5358 if (double_quote != MATCH_YES)
5359 single_quote = gfc_match_char ('\'');
5360 if (double_quote != MATCH_YES && single_quote != MATCH_YES)
5362 gfc_error ("Syntax error in NAME= specifier for binding label "
5367 /* Grab the binding label, using functions that will not lower
5368 case the names automatically. */
5369 if (gfc_match_name_C (binding_label) != MATCH_YES)
5372 /* Get the closing quotation. */
5373 if (double_quote == MATCH_YES)
5375 if (gfc_match_char ('"') != MATCH_YES)
5377 gfc_error ("Missing closing quote '\"' for binding label at %C");
5378 /* User started string with '"' so looked to match it. */
5384 if (gfc_match_char ('\'') != MATCH_YES)
5386 gfc_error ("Missing closing quote '\'' for binding label at %C");
5387 /* User started string with "'" char. */
5393 /* Get the required right paren. */
5394 if (gfc_match_char (')') != MATCH_YES)
5396 gfc_error ("Missing closing paren for binding label at %C");
5400 if (has_name_equals && !allow_binding_name)
5402 gfc_error ("No binding name is allowed in BIND(C) at %C");
5406 if (has_name_equals && sym != NULL && sym->attr.dummy)
5408 gfc_error ("For dummy procedure %s, no binding name is "
5409 "allowed in BIND(C) at %C", sym->name);
5414 /* Save the binding label to the symbol. If sym is null, we're
5415 probably matching the typespec attributes of a declaration and
5416 haven't gotten the name yet, and therefore, no symbol yet. */
5417 if (binding_label[0] != '\0')
5421 strcpy (sym->binding_label, binding_label);
5424 strcpy (curr_binding_label, binding_label);
5426 else if (allow_binding_name)
5428 /* No binding label, but if symbol isn't null, we
5429 can set the label for it here.
5430 If name="" or allow_binding_name is false, no C binding name is
5432 if (sym != NULL && sym->name != NULL && has_name_equals == 0)
5433 strncpy (sym->binding_label, sym->name, strlen (sym->name) + 1);
5436 if (has_name_equals && gfc_current_state () == COMP_INTERFACE
5437 && current_interface.type == INTERFACE_ABSTRACT)
5439 gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C");
5447 /* Return nonzero if we're currently compiling a contained procedure. */
5450 contained_procedure (void)
5452 gfc_state_data *s = gfc_state_stack;
5454 if ((s->state == COMP_SUBROUTINE || s->state == COMP_FUNCTION)
5455 && s->previous != NULL && s->previous->state == COMP_CONTAINS)
5461 /* Set the kind of each enumerator. The kind is selected such that it is
5462 interoperable with the corresponding C enumeration type, making
5463 sure that -fshort-enums is honored. */
5468 enumerator_history *current_history = NULL;
5472 if (max_enum == NULL || enum_history == NULL)
5475 if (!flag_short_enums)
5481 kind = gfc_integer_kinds[i++].kind;
5483 while (kind < gfc_c_int_kind
5484 && gfc_check_integer_range (max_enum->initializer->value.integer,
5487 current_history = enum_history;
5488 while (current_history != NULL)
5490 current_history->sym->ts.kind = kind;
5491 current_history = current_history->next;
5496 /* Match any of the various end-block statements. Returns the type of
5497 END to the caller. The END INTERFACE, END IF, END DO, END SELECT
5498 and END BLOCK statements cannot be replaced by a single END statement. */
5501 gfc_match_end (gfc_statement *st)
5503 char name[GFC_MAX_SYMBOL_LEN + 1];
5504 gfc_compile_state state;
5506 const char *block_name;
5511 old_loc = gfc_current_locus;
5512 if (gfc_match ("end") != MATCH_YES)
5515 state = gfc_current_state ();
5516 block_name = gfc_current_block () == NULL
5517 ? NULL : gfc_current_block ()->name;
5521 case COMP_ASSOCIATE:
5523 if (!strcmp (block_name, "block@"))
5528 case COMP_DERIVED_CONTAINS:
5529 state = gfc_state_stack->previous->state;
5530 block_name = gfc_state_stack->previous->sym == NULL
5531 ? NULL : gfc_state_stack->previous->sym->name;
5542 *st = ST_END_PROGRAM;
5543 target = " program";
5547 case COMP_SUBROUTINE:
5548 *st = ST_END_SUBROUTINE;
5549 target = " subroutine";
5550 eos_ok = !contained_procedure ();
5554 *st = ST_END_FUNCTION;
5555 target = " function";
5556 eos_ok = !contained_procedure ();
5559 case COMP_BLOCK_DATA:
5560 *st = ST_END_BLOCK_DATA;
5561 target = " block data";
5566 *st = ST_END_MODULE;
5571 case COMP_INTERFACE:
5572 *st = ST_END_INTERFACE;
5573 target = " interface";
5578 case COMP_DERIVED_CONTAINS:
5584 case COMP_ASSOCIATE:
5585 *st = ST_END_ASSOCIATE;
5586 target = " associate";
5609 *st = ST_END_CRITICAL;
5610 target = " critical";
5615 case COMP_SELECT_TYPE:
5616 *st = ST_END_SELECT;
5622 *st = ST_END_FORALL;
5637 last_initializer = NULL;
5639 gfc_free_enum_history ();
5643 gfc_error ("Unexpected END statement at %C");
5647 if (gfc_match_eos () == MATCH_YES)
5649 if (!eos_ok && (*st == ST_END_SUBROUTINE || *st == ST_END_FUNCTION))
5651 if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: END statement "
5652 "instead of %s statement at %L",
5653 gfc_ascii_statement (*st), &old_loc) == FAILURE)
5658 /* We would have required END [something]. */
5659 gfc_error ("%s statement expected at %L",
5660 gfc_ascii_statement (*st), &old_loc);
5667 /* Verify that we've got the sort of end-block that we're expecting. */
5668 if (gfc_match (target) != MATCH_YES)
5670 gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st));
5674 /* If we're at the end, make sure a block name wasn't required. */
5675 if (gfc_match_eos () == MATCH_YES)
5678 if (*st != ST_ENDDO && *st != ST_ENDIF && *st != ST_END_SELECT
5679 && *st != ST_END_FORALL && *st != ST_END_WHERE && *st != ST_END_BLOCK
5680 && *st != ST_END_ASSOCIATE && *st != ST_END_CRITICAL)
5686 gfc_error ("Expected block name of '%s' in %s statement at %C",
5687 block_name, gfc_ascii_statement (*st));
5692 /* END INTERFACE has a special handler for its several possible endings. */
5693 if (*st == ST_END_INTERFACE)
5694 return gfc_match_end_interface ();
5696 /* We haven't hit the end of statement, so what is left must be an
5698 m = gfc_match_space ();
5700 m = gfc_match_name (name);
5703 gfc_error ("Expected terminating name at %C");
5707 if (block_name == NULL)
5710 if (strcmp (name, block_name) != 0 && strcmp (block_name, "ppr@") != 0)
5712 gfc_error ("Expected label '%s' for %s statement at %C", block_name,
5713 gfc_ascii_statement (*st));
5716 /* Procedure pointer as function result. */
5717 else if (strcmp (block_name, "ppr@") == 0
5718 && strcmp (name, gfc_current_block ()->ns->proc_name->name) != 0)
5720 gfc_error ("Expected label '%s' for %s statement at %C",
5721 gfc_current_block ()->ns->proc_name->name,
5722 gfc_ascii_statement (*st));
5726 if (gfc_match_eos () == MATCH_YES)
5730 gfc_syntax_error (*st);
5733 gfc_current_locus = old_loc;
5739 /***************** Attribute declaration statements ****************/
5741 /* Set the attribute of a single variable. */
5746 char name[GFC_MAX_SYMBOL_LEN + 1];
5754 m = gfc_match_name (name);
5758 if (find_special (name, &sym, false))
5761 var_locus = gfc_current_locus;
5763 /* Deal with possible array specification for certain attributes. */
5764 if (current_attr.dimension
5765 || current_attr.codimension
5766 || current_attr.allocatable
5767 || current_attr.pointer
5768 || current_attr.target)
5770 m = gfc_match_array_spec (&as, !current_attr.codimension,
5771 !current_attr.dimension
5772 && !current_attr.pointer
5773 && !current_attr.target);
5774 if (m == MATCH_ERROR)
5777 if (current_attr.dimension && m == MATCH_NO)
5779 gfc_error ("Missing array specification at %L in DIMENSION "
5780 "statement", &var_locus);
5785 if (current_attr.dimension && sym->value)
5787 gfc_error ("Dimensions specified for %s at %L after its "
5788 "initialisation", sym->name, &var_locus);
5793 if (current_attr.codimension && m == MATCH_NO)
5795 gfc_error ("Missing array specification at %L in CODIMENSION "
5796 "statement", &var_locus);
5801 if ((current_attr.allocatable || current_attr.pointer)
5802 && (m == MATCH_YES) && (as->type != AS_DEFERRED))
5804 gfc_error ("Array specification must be deferred at %L", &var_locus);
5810 /* Update symbol table. DIMENSION attribute is set in
5811 gfc_set_array_spec(). For CLASS variables, this must be applied
5812 to the first component, or '$data' field. */
5813 if (sym->ts.type == BT_CLASS)
5815 if (gfc_copy_attr (&CLASS_DATA (sym)->attr, ¤t_attr,&var_locus)
5821 sym->attr.class_ok = (sym->attr.class_ok || current_attr.allocatable
5822 || current_attr.pointer);
5826 if (current_attr.dimension == 0 && current_attr.codimension == 0
5827 && gfc_copy_attr (&sym->attr, ¤t_attr, &var_locus) == FAILURE)
5834 if (gfc_set_array_spec (sym, as, &var_locus) == FAILURE)
5840 if (sym->attr.cray_pointee && sym->as != NULL)
5842 /* Fix the array spec. */
5843 m = gfc_mod_pointee_as (sym->as);
5844 if (m == MATCH_ERROR)
5848 if (gfc_add_attribute (&sym->attr, &var_locus) == FAILURE)
5854 if ((current_attr.external || current_attr.intrinsic)
5855 && sym->attr.flavor != FL_PROCEDURE
5856 && gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL) == FAILURE)
5862 add_hidden_procptr_result (sym);
5867 gfc_free_array_spec (as);
5872 /* Generic attribute declaration subroutine. Used for attributes that
5873 just have a list of names. */
5880 /* Gobble the optional double colon, by simply ignoring the result
5890 if (gfc_match_eos () == MATCH_YES)
5896 if (gfc_match_char (',') != MATCH_YES)
5898 gfc_error ("Unexpected character in variable list at %C");
5908 /* This routine matches Cray Pointer declarations of the form:
5909 pointer ( <pointer>, <pointee> )
5911 pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ...
5912 The pointer, if already declared, should be an integer. Otherwise, we
5913 set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may
5914 be either a scalar, or an array declaration. No space is allocated for
5915 the pointee. For the statement
5916 pointer (ipt, ar(10))
5917 any subsequent uses of ar will be translated (in C-notation) as
5918 ar(i) => ((<type> *) ipt)(i)
5919 After gimplification, pointee variable will disappear in the code. */
5922 cray_pointer_decl (void)
5925 gfc_array_spec *as = NULL;
5926 gfc_symbol *cptr; /* Pointer symbol. */
5927 gfc_symbol *cpte; /* Pointee symbol. */
5933 if (gfc_match_char ('(') != MATCH_YES)
5935 gfc_error ("Expected '(' at %C");
5939 /* Match pointer. */
5940 var_locus = gfc_current_locus;
5941 gfc_clear_attr (¤t_attr);
5942 gfc_add_cray_pointer (¤t_attr, &var_locus);
5943 current_ts.type = BT_INTEGER;
5944 current_ts.kind = gfc_index_integer_kind;
5946 m = gfc_match_symbol (&cptr, 0);
5949 gfc_error ("Expected variable name at %C");
5953 if (gfc_add_cray_pointer (&cptr->attr, &var_locus) == FAILURE)
5956 gfc_set_sym_referenced (cptr);
5958 if (cptr->ts.type == BT_UNKNOWN) /* Override the type, if necessary. */
5960 cptr->ts.type = BT_INTEGER;
5961 cptr->ts.kind = gfc_index_integer_kind;
5963 else if (cptr->ts.type != BT_INTEGER)
5965 gfc_error ("Cray pointer at %C must be an integer");
5968 else if (cptr->ts.kind < gfc_index_integer_kind)
5969 gfc_warning ("Cray pointer at %C has %d bytes of precision;"
5970 " memory addresses require %d bytes",
5971 cptr->ts.kind, gfc_index_integer_kind);
5973 if (gfc_match_char (',') != MATCH_YES)
5975 gfc_error ("Expected \",\" at %C");
5979 /* Match Pointee. */
5980 var_locus = gfc_current_locus;
5981 gfc_clear_attr (¤t_attr);
5982 gfc_add_cray_pointee (¤t_attr, &var_locus);
5983 current_ts.type = BT_UNKNOWN;
5984 current_ts.kind = 0;
5986 m = gfc_match_symbol (&cpte, 0);
5989 gfc_error ("Expected variable name at %C");
5993 /* Check for an optional array spec. */
5994 m = gfc_match_array_spec (&as, true, false);
5995 if (m == MATCH_ERROR)
5997 gfc_free_array_spec (as);
6000 else if (m == MATCH_NO)
6002 gfc_free_array_spec (as);
6006 if (gfc_add_cray_pointee (&cpte->attr, &var_locus) == FAILURE)
6009 gfc_set_sym_referenced (cpte);
6011 if (cpte->as == NULL)
6013 if (gfc_set_array_spec (cpte, as, &var_locus) == FAILURE)
6014 gfc_internal_error ("Couldn't set Cray pointee array spec.");
6016 else if (as != NULL)
6018 gfc_error ("Duplicate array spec for Cray pointee at %C");
6019 gfc_free_array_spec (as);
6025 if (cpte->as != NULL)
6027 /* Fix array spec. */
6028 m = gfc_mod_pointee_as (cpte->as);
6029 if (m == MATCH_ERROR)
6033 /* Point the Pointee at the Pointer. */
6034 cpte->cp_pointer = cptr;
6036 if (gfc_match_char (')') != MATCH_YES)
6038 gfc_error ("Expected \")\" at %C");
6041 m = gfc_match_char (',');
6043 done = true; /* Stop searching for more declarations. */
6047 if (m == MATCH_ERROR /* Failed when trying to find ',' above. */
6048 || gfc_match_eos () != MATCH_YES)
6050 gfc_error ("Expected \",\" or end of statement at %C");
6058 gfc_match_external (void)
6061 gfc_clear_attr (¤t_attr);
6062 current_attr.external = 1;
6064 return attr_decl ();
6069 gfc_match_intent (void)
6073 /* This is not allowed within a BLOCK construct! */
6074 if (gfc_current_state () == COMP_BLOCK)
6076 gfc_error ("INTENT is not allowed inside of BLOCK at %C");
6080 intent = match_intent_spec ();
6081 if (intent == INTENT_UNKNOWN)
6084 gfc_clear_attr (¤t_attr);
6085 current_attr.intent = intent;
6087 return attr_decl ();
6092 gfc_match_intrinsic (void)
6095 gfc_clear_attr (¤t_attr);
6096 current_attr.intrinsic = 1;
6098 return attr_decl ();
6103 gfc_match_optional (void)
6105 /* This is not allowed within a BLOCK construct! */
6106 if (gfc_current_state () == COMP_BLOCK)
6108 gfc_error ("OPTIONAL is not allowed inside of BLOCK at %C");
6112 gfc_clear_attr (¤t_attr);
6113 current_attr.optional = 1;
6115 return attr_decl ();
6120 gfc_match_pointer (void)
6122 gfc_gobble_whitespace ();
6123 if (gfc_peek_ascii_char () == '(')
6125 if (!gfc_option.flag_cray_pointer)
6127 gfc_error ("Cray pointer declaration at %C requires -fcray-pointer "
6131 return cray_pointer_decl ();
6135 gfc_clear_attr (¤t_attr);
6136 current_attr.pointer = 1;
6138 return attr_decl ();
6144 gfc_match_allocatable (void)
6146 gfc_clear_attr (¤t_attr);
6147 current_attr.allocatable = 1;
6149 return attr_decl ();
6154 gfc_match_codimension (void)
6156 gfc_clear_attr (¤t_attr);
6157 current_attr.codimension = 1;
6159 return attr_decl ();
6164 gfc_match_contiguous (void)
6166 if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: CONTIGUOUS statement at %C")
6170 gfc_clear_attr (¤t_attr);
6171 current_attr.contiguous = 1;
6173 return attr_decl ();
6178 gfc_match_dimension (void)
6180 gfc_clear_attr (¤t_attr);
6181 current_attr.dimension = 1;
6183 return attr_decl ();
6188 gfc_match_target (void)
6190 gfc_clear_attr (¤t_attr);
6191 current_attr.target = 1;
6193 return attr_decl ();
6197 /* Match the list of entities being specified in a PUBLIC or PRIVATE
6201 access_attr_decl (gfc_statement st)
6203 char name[GFC_MAX_SYMBOL_LEN + 1];
6204 interface_type type;
6207 gfc_intrinsic_op op;
6210 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6215 m = gfc_match_generic_spec (&type, name, &op);
6218 if (m == MATCH_ERROR)
6223 case INTERFACE_NAMELESS:
6224 case INTERFACE_ABSTRACT:
6227 case INTERFACE_GENERIC:
6228 if (gfc_get_symbol (name, NULL, &sym))
6231 if (gfc_add_access (&sym->attr, (st == ST_PUBLIC)
6232 ? ACCESS_PUBLIC : ACCESS_PRIVATE,
6233 sym->name, NULL) == FAILURE)
6238 case INTERFACE_INTRINSIC_OP:
6239 if (gfc_current_ns->operator_access[op] == ACCESS_UNKNOWN)
6241 gfc_current_ns->operator_access[op] =
6242 (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE;
6246 gfc_error ("Access specification of the %s operator at %C has "
6247 "already been specified", gfc_op2string (op));
6253 case INTERFACE_USER_OP:
6254 uop = gfc_get_uop (name);
6256 if (uop->access == ACCESS_UNKNOWN)
6258 uop->access = (st == ST_PUBLIC)
6259 ? ACCESS_PUBLIC : ACCESS_PRIVATE;
6263 gfc_error ("Access specification of the .%s. operator at %C "
6264 "has already been specified", sym->name);
6271 if (gfc_match_char (',') == MATCH_NO)
6275 if (gfc_match_eos () != MATCH_YES)
6280 gfc_syntax_error (st);
6288 gfc_match_protected (void)
6293 if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE)
6295 gfc_error ("PROTECTED at %C only allowed in specification "
6296 "part of a module");
6301 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED statement at %C")
6305 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6310 if (gfc_match_eos () == MATCH_YES)
6315 m = gfc_match_symbol (&sym, 0);
6319 if (gfc_add_protected (&sym->attr, sym->name, &gfc_current_locus)
6332 if (gfc_match_eos () == MATCH_YES)
6334 if (gfc_match_char (',') != MATCH_YES)
6341 gfc_error ("Syntax error in PROTECTED statement at %C");
6346 /* The PRIVATE statement is a bit weird in that it can be an attribute
6347 declaration, but also works as a standalone statement inside of a
6348 type declaration or a module. */
6351 gfc_match_private (gfc_statement *st)
6354 if (gfc_match ("private") != MATCH_YES)
6357 if (gfc_current_state () != COMP_MODULE
6358 && !(gfc_current_state () == COMP_DERIVED
6359 && gfc_state_stack->previous
6360 && gfc_state_stack->previous->state == COMP_MODULE)
6361 && !(gfc_current_state () == COMP_DERIVED_CONTAINS
6362 && gfc_state_stack->previous && gfc_state_stack->previous->previous
6363 && gfc_state_stack->previous->previous->state == COMP_MODULE))
6365 gfc_error ("PRIVATE statement at %C is only allowed in the "
6366 "specification part of a module");
6370 if (gfc_current_state () == COMP_DERIVED)
6372 if (gfc_match_eos () == MATCH_YES)
6378 gfc_syntax_error (ST_PRIVATE);
6382 if (gfc_match_eos () == MATCH_YES)
6389 return access_attr_decl (ST_PRIVATE);
6394 gfc_match_public (gfc_statement *st)
6397 if (gfc_match ("public") != MATCH_YES)
6400 if (gfc_current_state () != COMP_MODULE)
6402 gfc_error ("PUBLIC statement at %C is only allowed in the "
6403 "specification part of a module");
6407 if (gfc_match_eos () == MATCH_YES)
6414 return access_attr_decl (ST_PUBLIC);
6418 /* Workhorse for gfc_match_parameter. */
6428 m = gfc_match_symbol (&sym, 0);
6430 gfc_error ("Expected variable name at %C in PARAMETER statement");
6435 if (gfc_match_char ('=') == MATCH_NO)
6437 gfc_error ("Expected = sign in PARAMETER statement at %C");
6441 m = gfc_match_init_expr (&init);
6443 gfc_error ("Expected expression at %C in PARAMETER statement");
6447 if (sym->ts.type == BT_UNKNOWN
6448 && gfc_set_default_type (sym, 1, NULL) == FAILURE)
6454 if (gfc_check_assign_symbol (sym, init) == FAILURE
6455 || gfc_add_flavor (&sym->attr, FL_PARAMETER, sym->name, NULL) == FAILURE)
6463 gfc_error ("Initializing already initialized variable at %C");
6468 t = add_init_expr_to_sym (sym->name, &init, &gfc_current_locus);
6469 return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR;
6472 gfc_free_expr (init);
6477 /* Match a parameter statement, with the weird syntax that these have. */
6480 gfc_match_parameter (void)
6484 if (gfc_match_char ('(') == MATCH_NO)
6493 if (gfc_match (" )%t") == MATCH_YES)
6496 if (gfc_match_char (',') != MATCH_YES)
6498 gfc_error ("Unexpected characters in PARAMETER statement at %C");
6508 /* Save statements have a special syntax. */
6511 gfc_match_save (void)
6513 char n[GFC_MAX_SYMBOL_LEN+1];
6518 if (gfc_match_eos () == MATCH_YES)
6520 if (gfc_current_ns->seen_save)
6522 if (gfc_notify_std (GFC_STD_LEGACY, "Blanket SAVE statement at %C "
6523 "follows previous SAVE statement")
6528 gfc_current_ns->save_all = gfc_current_ns->seen_save = 1;
6532 if (gfc_current_ns->save_all)
6534 if (gfc_notify_std (GFC_STD_LEGACY, "SAVE statement at %C follows "
6535 "blanket SAVE statement")
6544 m = gfc_match_symbol (&sym, 0);
6548 if (gfc_add_save (&sym->attr, sym->name, &gfc_current_locus)
6560 m = gfc_match (" / %n /", &n);
6561 if (m == MATCH_ERROR)
6566 c = gfc_get_common (n, 0);
6569 gfc_current_ns->seen_save = 1;
6572 if (gfc_match_eos () == MATCH_YES)
6574 if (gfc_match_char (',') != MATCH_YES)
6581 gfc_error ("Syntax error in SAVE statement at %C");
6587 gfc_match_value (void)
6592 /* This is not allowed within a BLOCK construct! */
6593 if (gfc_current_state () == COMP_BLOCK)
6595 gfc_error ("VALUE is not allowed inside of BLOCK at %C");
6599 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE statement at %C")
6603 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6608 if (gfc_match_eos () == MATCH_YES)
6613 m = gfc_match_symbol (&sym, 0);
6617 if (gfc_add_value (&sym->attr, sym->name, &gfc_current_locus)
6630 if (gfc_match_eos () == MATCH_YES)
6632 if (gfc_match_char (',') != MATCH_YES)
6639 gfc_error ("Syntax error in VALUE statement at %C");
6645 gfc_match_volatile (void)
6650 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VOLATILE statement at %C")
6654 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6659 if (gfc_match_eos () == MATCH_YES)
6664 /* VOLATILE is special because it can be added to host-associated
6665 symbols locally. Except for coarrays. */
6666 m = gfc_match_symbol (&sym, 1);
6670 /* F2008, C560+C561. VOLATILE for host-/use-associated variable or
6671 for variable in a BLOCK which is defined outside of the BLOCK. */
6672 if (sym->ns != gfc_current_ns && sym->attr.codimension)
6674 gfc_error ("Specifying VOLATILE for coarray variable '%s' at "
6675 "%C, which is use-/host-associated", sym->name);
6678 if (gfc_add_volatile (&sym->attr, sym->name, &gfc_current_locus)
6691 if (gfc_match_eos () == MATCH_YES)
6693 if (gfc_match_char (',') != MATCH_YES)
6700 gfc_error ("Syntax error in VOLATILE statement at %C");
6706 gfc_match_asynchronous (void)
6711 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ASYNCHRONOUS statement at %C")
6715 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6720 if (gfc_match_eos () == MATCH_YES)
6725 /* ASYNCHRONOUS is special because it can be added to host-associated
6727 m = gfc_match_symbol (&sym, 1);
6731 if (gfc_add_asynchronous (&sym->attr, sym->name, &gfc_current_locus)
6744 if (gfc_match_eos () == MATCH_YES)
6746 if (gfc_match_char (',') != MATCH_YES)
6753 gfc_error ("Syntax error in ASYNCHRONOUS statement at %C");
6758 /* Match a module procedure statement. Note that we have to modify
6759 symbols in the parent's namespace because the current one was there
6760 to receive symbols that are in an interface's formal argument list. */
6763 gfc_match_modproc (void)
6765 char name[GFC_MAX_SYMBOL_LEN + 1];
6768 gfc_namespace *module_ns;
6769 gfc_interface *old_interface_head, *interface;
6771 if (gfc_state_stack->state != COMP_INTERFACE
6772 || gfc_state_stack->previous == NULL
6773 || current_interface.type == INTERFACE_NAMELESS
6774 || current_interface.type == INTERFACE_ABSTRACT)
6776 gfc_error ("MODULE PROCEDURE at %C must be in a generic module "
6781 module_ns = gfc_current_ns->parent;
6782 for (; module_ns; module_ns = module_ns->parent)
6783 if (module_ns->proc_name->attr.flavor == FL_MODULE
6784 || module_ns->proc_name->attr.flavor == FL_PROGRAM
6785 || (module_ns->proc_name->attr.flavor == FL_PROCEDURE
6786 && !module_ns->proc_name->attr.contained))
6789 if (module_ns == NULL)
6792 /* Store the current state of the interface. We will need it if we
6793 end up with a syntax error and need to recover. */
6794 old_interface_head = gfc_current_interface_head ();
6798 locus old_locus = gfc_current_locus;
6801 m = gfc_match_name (name);
6807 /* Check for syntax error before starting to add symbols to the
6808 current namespace. */
6809 if (gfc_match_eos () == MATCH_YES)
6811 if (!last && gfc_match_char (',') != MATCH_YES)
6814 /* Now we're sure the syntax is valid, we process this item
6816 if (gfc_get_symbol (name, module_ns, &sym))
6819 if (sym->attr.intrinsic)
6821 gfc_error ("Intrinsic procedure at %L cannot be a MODULE "
6822 "PROCEDURE", &old_locus);
6826 if (sym->attr.proc != PROC_MODULE
6827 && gfc_add_procedure (&sym->attr, PROC_MODULE,
6828 sym->name, NULL) == FAILURE)
6831 if (gfc_add_interface (sym) == FAILURE)
6834 sym->attr.mod_proc = 1;
6835 sym->declared_at = old_locus;
6844 /* Restore the previous state of the interface. */
6845 interface = gfc_current_interface_head ();
6846 gfc_set_current_interface_head (old_interface_head);
6848 /* Free the new interfaces. */
6849 while (interface != old_interface_head)
6851 gfc_interface *i = interface->next;
6852 gfc_free (interface);
6856 /* And issue a syntax error. */
6857 gfc_syntax_error (ST_MODULE_PROC);
6862 /* Check a derived type that is being extended. */
6864 check_extended_derived_type (char *name)
6866 gfc_symbol *extended;
6868 if (gfc_find_symbol (name, gfc_current_ns, 1, &extended))
6870 gfc_error ("Ambiguous symbol in TYPE definition at %C");
6876 gfc_error ("No such symbol in TYPE definition at %C");
6880 if (extended->attr.flavor != FL_DERIVED)
6882 gfc_error ("'%s' in EXTENDS expression at %C is not a "
6883 "derived type", name);
6887 if (extended->attr.is_bind_c)
6889 gfc_error ("'%s' cannot be extended at %C because it "
6890 "is BIND(C)", extended->name);
6894 if (extended->attr.sequence)
6896 gfc_error ("'%s' cannot be extended at %C because it "
6897 "is a SEQUENCE type", extended->name);
6905 /* Match the optional attribute specifiers for a type declaration.
6906 Return MATCH_ERROR if an error is encountered in one of the handled
6907 attributes (public, private, bind(c)), MATCH_NO if what's found is
6908 not a handled attribute, and MATCH_YES otherwise. TODO: More error
6909 checking on attribute conflicts needs to be done. */
6912 gfc_get_type_attr_spec (symbol_attribute *attr, char *name)
6914 /* See if the derived type is marked as private. */
6915 if (gfc_match (" , private") == MATCH_YES)
6917 if (gfc_current_state () != COMP_MODULE)
6919 gfc_error ("Derived type at %C can only be PRIVATE in the "
6920 "specification part of a module");
6924 if (gfc_add_access (attr, ACCESS_PRIVATE, NULL, NULL) == FAILURE)
6927 else if (gfc_match (" , public") == MATCH_YES)
6929 if (gfc_current_state () != COMP_MODULE)
6931 gfc_error ("Derived type at %C can only be PUBLIC in the "
6932 "specification part of a module");
6936 if (gfc_add_access (attr, ACCESS_PUBLIC, NULL, NULL) == FAILURE)
6939 else if (gfc_match (" , bind ( c )") == MATCH_YES)
6941 /* If the type is defined to be bind(c) it then needs to make
6942 sure that all fields are interoperable. This will
6943 need to be a semantic check on the finished derived type.
6944 See 15.2.3 (lines 9-12) of F2003 draft. */
6945 if (gfc_add_is_bind_c (attr, NULL, &gfc_current_locus, 0) != SUCCESS)
6948 /* TODO: attr conflicts need to be checked, probably in symbol.c. */
6950 else if (gfc_match (" , abstract") == MATCH_YES)
6952 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ABSTRACT type at %C")
6956 if (gfc_add_abstract (attr, &gfc_current_locus) == FAILURE)
6959 else if (name && gfc_match(" , extends ( %n )", name) == MATCH_YES)
6961 if (gfc_add_extension (attr, &gfc_current_locus) == FAILURE)
6967 /* If we get here, something matched. */
6972 /* Assign a hash value for a derived type. The algorithm is that of
6973 SDBM. The hashed string is '[module_name #] derived_name'. */
6975 hash_value (gfc_symbol *sym)
6977 unsigned int hash = 0;
6981 /* Hash of the module or procedure name. */
6982 if (sym->module != NULL)
6984 else if (sym->ns && sym->ns->proc_name
6985 && sym->ns->proc_name->attr.flavor == FL_MODULE)
6986 c = sym->ns->proc_name->name;
6993 for (i = 0; i < len; i++, c++)
6994 hash = (hash << 6) + (hash << 16) - hash + (*c);
6996 /* Disambiguate between 'a' in 'aa' and 'aa' in 'a'. */
6997 hash = (hash << 6) + (hash << 16) - hash + '#';
7000 /* Hash of the derived type name. */
7001 len = strlen (sym->name);
7003 for (i = 0; i < len; i++, c++)
7004 hash = (hash << 6) + (hash << 16) - hash + (*c);
7006 /* Return the hash but take the modulus for the sake of module read,
7007 even though this slightly increases the chance of collision. */
7008 return (hash % 100000000);
7012 /* Match the beginning of a derived type declaration. If a type name
7013 was the result of a function, then it is possible to have a symbol
7014 already to be known as a derived type yet have no components. */
7017 gfc_match_derived_decl (void)
7019 char name[GFC_MAX_SYMBOL_LEN + 1];
7020 char parent[GFC_MAX_SYMBOL_LEN + 1];
7021 symbol_attribute attr;
7023 gfc_symbol *extended;
7025 match is_type_attr_spec = MATCH_NO;
7026 bool seen_attr = false;
7028 if (gfc_current_state () == COMP_DERIVED)
7033 gfc_clear_attr (&attr);
7038 is_type_attr_spec = gfc_get_type_attr_spec (&attr, parent);
7039 if (is_type_attr_spec == MATCH_ERROR)
7041 if (is_type_attr_spec == MATCH_YES)
7043 } while (is_type_attr_spec == MATCH_YES);
7045 /* Deal with derived type extensions. The extension attribute has
7046 been added to 'attr' but now the parent type must be found and
7049 extended = check_extended_derived_type (parent);
7051 if (parent[0] && !extended)
7054 if (gfc_match (" ::") != MATCH_YES && seen_attr)
7056 gfc_error ("Expected :: in TYPE definition at %C");
7060 m = gfc_match (" %n%t", name);
7064 /* Make sure the name is not the name of an intrinsic type. */
7065 if (gfc_is_intrinsic_typename (name))
7067 gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic "
7072 if (gfc_get_symbol (name, NULL, &sym))
7075 if (sym->ts.type != BT_UNKNOWN)
7077 gfc_error ("Derived type name '%s' at %C already has a basic type "
7078 "of %s", sym->name, gfc_typename (&sym->ts));
7082 /* The symbol may already have the derived attribute without the
7083 components. The ways this can happen is via a function
7084 definition, an INTRINSIC statement or a subtype in another
7085 derived type that is a pointer. The first part of the AND clause
7086 is true if the symbol is not the return value of a function. */
7087 if (sym->attr.flavor != FL_DERIVED
7088 && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE)
7091 if (sym->components != NULL || sym->attr.zero_comp)
7093 gfc_error ("Derived type definition of '%s' at %C has already been "
7094 "defined", sym->name);
7098 if (attr.access != ACCESS_UNKNOWN
7099 && gfc_add_access (&sym->attr, attr.access, sym->name, NULL) == FAILURE)
7102 /* See if the derived type was labeled as bind(c). */
7103 if (attr.is_bind_c != 0)
7104 sym->attr.is_bind_c = attr.is_bind_c;
7106 /* Construct the f2k_derived namespace if it is not yet there. */
7107 if (!sym->f2k_derived)
7108 sym->f2k_derived = gfc_get_namespace (NULL, 0);
7110 if (extended && !sym->components)
7115 /* Add the extended derived type as the first component. */
7116 gfc_add_component (sym, parent, &p);
7118 gfc_set_sym_referenced (extended);
7120 p->ts.type = BT_DERIVED;
7121 p->ts.u.derived = extended;
7122 p->initializer = gfc_default_initializer (&p->ts);
7124 /* Set extension level. */
7125 if (extended->attr.extension == 255)
7127 /* Since the extension field is 8 bit wide, we can only have
7128 up to 255 extension levels. */
7129 gfc_error ("Maximum extension level reached with type '%s' at %L",
7130 extended->name, &extended->declared_at);
7133 sym->attr.extension = extended->attr.extension + 1;
7135 /* Provide the links between the extended type and its extension. */
7136 if (!extended->f2k_derived)
7137 extended->f2k_derived = gfc_get_namespace (NULL, 0);
7138 st = gfc_new_symtree (&extended->f2k_derived->sym_root, sym->name);
7142 if (!sym->hash_value)
7143 /* Set the hash for the compound name for this type. */
7144 sym->hash_value = hash_value (sym);
7146 /* Take over the ABSTRACT attribute. */
7147 sym->attr.abstract = attr.abstract;
7149 gfc_new_block = sym;
7155 /* Cray Pointees can be declared as:
7156 pointer (ipt, a (n,m,...,*)) */
7159 gfc_mod_pointee_as (gfc_array_spec *as)
7161 as->cray_pointee = true; /* This will be useful to know later. */
7162 if (as->type == AS_ASSUMED_SIZE)
7163 as->cp_was_assumed = true;
7164 else if (as->type == AS_ASSUMED_SHAPE)
7166 gfc_error ("Cray Pointee at %C cannot be assumed shape array");
7173 /* Match the enum definition statement, here we are trying to match
7174 the first line of enum definition statement.
7175 Returns MATCH_YES if match is found. */
7178 gfc_match_enum (void)
7182 m = gfc_match_eos ();
7186 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENUM and ENUMERATOR at %C")
7194 /* Returns an initializer whose value is one higher than the value of the
7195 LAST_INITIALIZER argument. If the argument is NULL, the
7196 initializers value will be set to zero. The initializer's kind
7197 will be set to gfc_c_int_kind.
7199 If -fshort-enums is given, the appropriate kind will be selected
7200 later after all enumerators have been parsed. A warning is issued
7201 here if an initializer exceeds gfc_c_int_kind. */
7204 enum_initializer (gfc_expr *last_initializer, locus where)
7207 result = gfc_get_constant_expr (BT_INTEGER, gfc_c_int_kind, &where);
7209 mpz_init (result->value.integer);
7211 if (last_initializer != NULL)
7213 mpz_add_ui (result->value.integer, last_initializer->value.integer, 1);
7214 result->where = last_initializer->where;
7216 if (gfc_check_integer_range (result->value.integer,
7217 gfc_c_int_kind) != ARITH_OK)
7219 gfc_error ("Enumerator exceeds the C integer type at %C");
7225 /* Control comes here, if it's the very first enumerator and no
7226 initializer has been given. It will be initialized to zero. */
7227 mpz_set_si (result->value.integer, 0);
7234 /* Match a variable name with an optional initializer. When this
7235 subroutine is called, a variable is expected to be parsed next.
7236 Depending on what is happening at the moment, updates either the
7237 symbol table or the current interface. */
7240 enumerator_decl (void)
7242 char name[GFC_MAX_SYMBOL_LEN + 1];
7243 gfc_expr *initializer;
7244 gfc_array_spec *as = NULL;
7252 old_locus = gfc_current_locus;
7254 /* When we get here, we've just matched a list of attributes and
7255 maybe a type and a double colon. The next thing we expect to see
7256 is the name of the symbol. */
7257 m = gfc_match_name (name);
7261 var_locus = gfc_current_locus;
7263 /* OK, we've successfully matched the declaration. Now put the
7264 symbol in the current namespace. If we fail to create the symbol,
7266 if (build_sym (name, NULL, &as, &var_locus) == FAILURE)
7272 /* The double colon must be present in order to have initializers.
7273 Otherwise the statement is ambiguous with an assignment statement. */
7276 if (gfc_match_char ('=') == MATCH_YES)
7278 m = gfc_match_init_expr (&initializer);
7281 gfc_error ("Expected an initialization expression at %C");
7290 /* If we do not have an initializer, the initialization value of the
7291 previous enumerator (stored in last_initializer) is incremented
7292 by 1 and is used to initialize the current enumerator. */
7293 if (initializer == NULL)
7294 initializer = enum_initializer (last_initializer, old_locus);
7296 if (initializer == NULL || initializer->ts.type != BT_INTEGER)
7298 gfc_error ("ENUMERATOR %L not initialized with integer expression",
7304 /* Store this current initializer, for the next enumerator variable
7305 to be parsed. add_init_expr_to_sym() zeros initializer, so we
7306 use last_initializer below. */
7307 last_initializer = initializer;
7308 t = add_init_expr_to_sym (name, &initializer, &var_locus);
7310 /* Maintain enumerator history. */
7311 gfc_find_symbol (name, NULL, 0, &sym);
7312 create_enum_history (sym, last_initializer);
7314 return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR;
7317 /* Free stuff up and return. */
7318 gfc_free_expr (initializer);
7324 /* Match the enumerator definition statement. */
7327 gfc_match_enumerator_def (void)
7332 gfc_clear_ts (¤t_ts);
7334 m = gfc_match (" enumerator");
7338 m = gfc_match (" :: ");
7339 if (m == MATCH_ERROR)
7342 colon_seen = (m == MATCH_YES);
7344 if (gfc_current_state () != COMP_ENUM)
7346 gfc_error ("ENUM definition statement expected before %C");
7347 gfc_free_enum_history ();
7351 (¤t_ts)->type = BT_INTEGER;
7352 (¤t_ts)->kind = gfc_c_int_kind;
7354 gfc_clear_attr (¤t_attr);
7355 t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, NULL);
7364 m = enumerator_decl ();
7365 if (m == MATCH_ERROR)
7367 gfc_free_enum_history ();
7373 if (gfc_match_eos () == MATCH_YES)
7375 if (gfc_match_char (',') != MATCH_YES)
7379 if (gfc_current_state () == COMP_ENUM)
7381 gfc_free_enum_history ();
7382 gfc_error ("Syntax error in ENUMERATOR definition at %C");
7387 gfc_free_array_spec (current_as);
7394 /* Match binding attributes. */
7397 match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc)
7399 bool found_passing = false;
7400 bool seen_ptr = false;
7401 match m = MATCH_YES;
7403 /* Intialize to defaults. Do so even before the MATCH_NO check so that in
7404 this case the defaults are in there. */
7405 ba->access = ACCESS_UNKNOWN;
7406 ba->pass_arg = NULL;
7407 ba->pass_arg_num = 0;
7409 ba->non_overridable = 0;
7413 /* If we find a comma, we believe there are binding attributes. */
7414 m = gfc_match_char (',');
7420 /* Access specifier. */
7422 m = gfc_match (" public");
7423 if (m == MATCH_ERROR)
7427 if (ba->access != ACCESS_UNKNOWN)
7429 gfc_error ("Duplicate access-specifier at %C");
7433 ba->access = ACCESS_PUBLIC;
7437 m = gfc_match (" private");
7438 if (m == MATCH_ERROR)
7442 if (ba->access != ACCESS_UNKNOWN)
7444 gfc_error ("Duplicate access-specifier at %C");
7448 ba->access = ACCESS_PRIVATE;
7452 /* If inside GENERIC, the following is not allowed. */
7457 m = gfc_match (" nopass");
7458 if (m == MATCH_ERROR)
7464 gfc_error ("Binding attributes already specify passing,"
7465 " illegal NOPASS at %C");
7469 found_passing = true;
7474 /* PASS possibly including argument. */
7475 m = gfc_match (" pass");
7476 if (m == MATCH_ERROR)
7480 char arg[GFC_MAX_SYMBOL_LEN + 1];
7484 gfc_error ("Binding attributes already specify passing,"
7485 " illegal PASS at %C");
7489 m = gfc_match (" ( %n )", arg);
7490 if (m == MATCH_ERROR)
7493 ba->pass_arg = gfc_get_string (arg);
7494 gcc_assert ((m == MATCH_YES) == (ba->pass_arg != NULL));
7496 found_passing = true;
7504 m = gfc_match (" pointer");
7505 if (m == MATCH_ERROR)
7511 gfc_error ("Duplicate POINTER attribute at %C");
7521 /* NON_OVERRIDABLE flag. */
7522 m = gfc_match (" non_overridable");
7523 if (m == MATCH_ERROR)
7527 if (ba->non_overridable)
7529 gfc_error ("Duplicate NON_OVERRIDABLE at %C");
7533 ba->non_overridable = 1;
7537 /* DEFERRED flag. */
7538 m = gfc_match (" deferred");
7539 if (m == MATCH_ERROR)
7545 gfc_error ("Duplicate DEFERRED at %C");
7556 /* Nothing matching found. */
7558 gfc_error ("Expected access-specifier at %C");
7560 gfc_error ("Expected binding attribute at %C");
7563 while (gfc_match_char (',') == MATCH_YES);
7565 /* NON_OVERRIDABLE and DEFERRED exclude themselves. */
7566 if (ba->non_overridable && ba->deferred)
7568 gfc_error ("NON_OVERRIDABLE and DEFERRED can't both appear at %C");
7575 if (ba->access == ACCESS_UNKNOWN)
7576 ba->access = gfc_typebound_default_access;
7578 if (ppc && !seen_ptr)
7580 gfc_error ("POINTER attribute is required for procedure pointer component"
7592 /* Match a PROCEDURE specific binding inside a derived type. */
7595 match_procedure_in_type (void)
7597 char name[GFC_MAX_SYMBOL_LEN + 1];
7598 char target_buf[GFC_MAX_SYMBOL_LEN + 1];
7599 char* target = NULL, *ifc = NULL;
7600 gfc_typebound_proc tb;
7609 /* Check current state. */
7610 gcc_assert (gfc_state_stack->state == COMP_DERIVED_CONTAINS);
7611 block = gfc_state_stack->previous->sym;
7614 /* Try to match PROCEDURE(interface). */
7615 if (gfc_match (" (") == MATCH_YES)
7617 m = gfc_match_name (target_buf);
7618 if (m == MATCH_ERROR)
7622 gfc_error ("Interface-name expected after '(' at %C");
7626 if (gfc_match (" )") != MATCH_YES)
7628 gfc_error ("')' expected at %C");
7635 /* Construct the data structure. */
7636 tb.where = gfc_current_locus;
7639 /* Match binding attributes. */
7640 m = match_binding_attributes (&tb, false, false);
7641 if (m == MATCH_ERROR)
7643 seen_attrs = (m == MATCH_YES);
7645 /* Check that attribute DEFERRED is given if an interface is specified. */
7646 if (tb.deferred && !ifc)
7648 gfc_error ("Interface must be specified for DEFERRED binding at %C");
7651 if (ifc && !tb.deferred)
7653 gfc_error ("PROCEDURE(interface) at %C should be declared DEFERRED");
7657 /* Match the colons. */
7658 m = gfc_match (" ::");
7659 if (m == MATCH_ERROR)
7661 seen_colons = (m == MATCH_YES);
7662 if (seen_attrs && !seen_colons)
7664 gfc_error ("Expected '::' after binding-attributes at %C");
7668 /* Match the binding names. */
7671 m = gfc_match_name (name);
7672 if (m == MATCH_ERROR)
7676 gfc_error ("Expected binding name at %C");
7680 if (num>1 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: PROCEDURE list"
7681 " at %C") == FAILURE)
7684 /* Try to match the '=> target', if it's there. */
7686 m = gfc_match (" =>");
7687 if (m == MATCH_ERROR)
7693 gfc_error ("'=> target' is invalid for DEFERRED binding at %C");
7699 gfc_error ("'::' needed in PROCEDURE binding with explicit target"
7704 m = gfc_match_name (target_buf);
7705 if (m == MATCH_ERROR)
7709 gfc_error ("Expected binding target after '=>' at %C");
7712 target = target_buf;
7715 /* If no target was found, it has the same name as the binding. */
7719 /* Get the namespace to insert the symbols into. */
7720 ns = block->f2k_derived;
7723 /* If the binding is DEFERRED, check that the containing type is ABSTRACT. */
7724 if (tb.deferred && !block->attr.abstract)
7726 gfc_error ("Type '%s' containing DEFERRED binding at %C "
7727 "is not ABSTRACT", block->name);
7731 /* See if we already have a binding with this name in the symtree which
7732 would be an error. If a GENERIC already targetted this binding, it may
7733 be already there but then typebound is still NULL. */
7734 stree = gfc_find_symtree (ns->tb_sym_root, name);
7735 if (stree && stree->n.tb)
7737 gfc_error ("There is already a procedure with binding name '%s' for "
7738 "the derived type '%s' at %C", name, block->name);
7742 /* Insert it and set attributes. */
7746 stree = gfc_new_symtree (&ns->tb_sym_root, name);
7749 stree->n.tb = gfc_get_typebound_proc (&tb);
7751 if (gfc_get_sym_tree (target, gfc_current_ns, &stree->n.tb->u.specific,
7754 gfc_set_sym_referenced (stree->n.tb->u.specific->n.sym);
7756 if (gfc_match_eos () == MATCH_YES)
7758 if (gfc_match_char (',') != MATCH_YES)
7763 gfc_error ("Syntax error in PROCEDURE statement at %C");
7768 /* Match a GENERIC procedure binding inside a derived type. */
7771 gfc_match_generic (void)
7773 char name[GFC_MAX_SYMBOL_LEN + 1];
7774 char bind_name[GFC_MAX_SYMBOL_LEN + 16]; /* Allow space for OPERATOR(...). */
7776 gfc_typebound_proc tbattr; /* Used for match_binding_attributes. */
7777 gfc_typebound_proc* tb;
7779 interface_type op_type;
7780 gfc_intrinsic_op op;
7783 /* Check current state. */
7784 if (gfc_current_state () == COMP_DERIVED)
7786 gfc_error ("GENERIC at %C must be inside a derived-type CONTAINS");
7789 if (gfc_current_state () != COMP_DERIVED_CONTAINS)
7791 block = gfc_state_stack->previous->sym;
7792 ns = block->f2k_derived;
7793 gcc_assert (block && ns);
7795 /* See if we get an access-specifier. */
7796 m = match_binding_attributes (&tbattr, true, false);
7797 if (m == MATCH_ERROR)
7800 /* Now the colons, those are required. */
7801 if (gfc_match (" ::") != MATCH_YES)
7803 gfc_error ("Expected '::' at %C");
7807 /* Match the binding name; depending on type (operator / generic) format
7808 it for future error messages into bind_name. */
7810 m = gfc_match_generic_spec (&op_type, name, &op);
7811 if (m == MATCH_ERROR)
7815 gfc_error ("Expected generic name or operator descriptor at %C");
7821 case INTERFACE_GENERIC:
7822 snprintf (bind_name, sizeof (bind_name), "%s", name);
7825 case INTERFACE_USER_OP:
7826 snprintf (bind_name, sizeof (bind_name), "OPERATOR(.%s.)", name);
7829 case INTERFACE_INTRINSIC_OP:
7830 snprintf (bind_name, sizeof (bind_name), "OPERATOR(%s)",
7831 gfc_op2string (op));
7838 /* Match the required =>. */
7839 if (gfc_match (" =>") != MATCH_YES)
7841 gfc_error ("Expected '=>' at %C");
7845 /* Try to find existing GENERIC binding with this name / for this operator;
7846 if there is something, check that it is another GENERIC and then extend
7847 it rather than building a new node. Otherwise, create it and put it
7848 at the right position. */
7852 case INTERFACE_USER_OP:
7853 case INTERFACE_GENERIC:
7855 const bool is_op = (op_type == INTERFACE_USER_OP);
7858 st = gfc_find_symtree (is_op ? ns->tb_uop_root : ns->tb_sym_root, name);
7870 case INTERFACE_INTRINSIC_OP:
7880 if (!tb->is_generic)
7882 gcc_assert (op_type == INTERFACE_GENERIC);
7883 gfc_error ("There's already a non-generic procedure with binding name"
7884 " '%s' for the derived type '%s' at %C",
7885 bind_name, block->name);
7889 if (tb->access != tbattr.access)
7891 gfc_error ("Binding at %C must have the same access as already"
7892 " defined binding '%s'", bind_name);
7898 tb = gfc_get_typebound_proc (NULL);
7899 tb->where = gfc_current_locus;
7900 tb->access = tbattr.access;
7902 tb->u.generic = NULL;
7906 case INTERFACE_GENERIC:
7907 case INTERFACE_USER_OP:
7909 const bool is_op = (op_type == INTERFACE_USER_OP);
7912 st = gfc_new_symtree (is_op ? &ns->tb_uop_root : &ns->tb_sym_root,
7920 case INTERFACE_INTRINSIC_OP:
7929 /* Now, match all following names as specific targets. */
7932 gfc_symtree* target_st;
7933 gfc_tbp_generic* target;
7935 m = gfc_match_name (name);
7936 if (m == MATCH_ERROR)
7940 gfc_error ("Expected specific binding name at %C");
7944 target_st = gfc_get_tbp_symtree (&ns->tb_sym_root, name);
7946 /* See if this is a duplicate specification. */
7947 for (target = tb->u.generic; target; target = target->next)
7948 if (target_st == target->specific_st)
7950 gfc_error ("'%s' already defined as specific binding for the"
7951 " generic '%s' at %C", name, bind_name);
7955 target = gfc_get_tbp_generic ();
7956 target->specific_st = target_st;
7957 target->specific = NULL;
7958 target->next = tb->u.generic;
7959 tb->u.generic = target;
7961 while (gfc_match (" ,") == MATCH_YES);
7963 /* Here should be the end. */
7964 if (gfc_match_eos () != MATCH_YES)
7966 gfc_error ("Junk after GENERIC binding at %C");
7977 /* Match a FINAL declaration inside a derived type. */
7980 gfc_match_final_decl (void)
7982 char name[GFC_MAX_SYMBOL_LEN + 1];
7985 gfc_namespace* module_ns;
7989 if (gfc_current_form == FORM_FREE)
7991 char c = gfc_peek_ascii_char ();
7992 if (!gfc_is_whitespace (c) && c != ':')
7996 if (gfc_state_stack->state != COMP_DERIVED_CONTAINS)
7998 if (gfc_current_form == FORM_FIXED)
8001 gfc_error ("FINAL declaration at %C must be inside a derived type "
8002 "CONTAINS section");
8006 block = gfc_state_stack->previous->sym;
8009 if (!gfc_state_stack->previous || !gfc_state_stack->previous->previous
8010 || gfc_state_stack->previous->previous->state != COMP_MODULE)
8012 gfc_error ("Derived type declaration with FINAL at %C must be in the"
8013 " specification part of a MODULE");
8017 module_ns = gfc_current_ns;
8018 gcc_assert (module_ns);
8019 gcc_assert (module_ns->proc_name->attr.flavor == FL_MODULE);
8021 /* Match optional ::, don't care about MATCH_YES or MATCH_NO. */
8022 if (gfc_match (" ::") == MATCH_ERROR)
8025 /* Match the sequence of procedure names. */
8032 if (first && gfc_match_eos () == MATCH_YES)
8034 gfc_error ("Empty FINAL at %C");
8038 m = gfc_match_name (name);
8041 gfc_error ("Expected module procedure name at %C");
8044 else if (m != MATCH_YES)
8047 if (gfc_match_eos () == MATCH_YES)
8049 if (!last && gfc_match_char (',') != MATCH_YES)
8051 gfc_error ("Expected ',' at %C");
8055 if (gfc_get_symbol (name, module_ns, &sym))
8057 gfc_error ("Unknown procedure name \"%s\" at %C", name);
8061 /* Mark the symbol as module procedure. */
8062 if (sym->attr.proc != PROC_MODULE
8063 && gfc_add_procedure (&sym->attr, PROC_MODULE,
8064 sym->name, NULL) == FAILURE)
8067 /* Check if we already have this symbol in the list, this is an error. */
8068 for (f = block->f2k_derived->finalizers; f; f = f->next)
8069 if (f->proc_sym == sym)
8071 gfc_error ("'%s' at %C is already defined as FINAL procedure!",
8076 /* Add this symbol to the list of finalizers. */
8077 gcc_assert (block->f2k_derived);
8079 f = XCNEW (gfc_finalizer);
8081 f->proc_tree = NULL;
8082 f->where = gfc_current_locus;
8083 f->next = block->f2k_derived->finalizers;
8084 block->f2k_derived->finalizers = f;
8094 const ext_attr_t ext_attr_list[] = {
8095 { "dllimport", EXT_ATTR_DLLIMPORT, "dllimport" },
8096 { "dllexport", EXT_ATTR_DLLEXPORT, "dllexport" },
8097 { "cdecl", EXT_ATTR_CDECL, "cdecl" },
8098 { "stdcall", EXT_ATTR_STDCALL, "stdcall" },
8099 { "fastcall", EXT_ATTR_FASTCALL, "fastcall" },
8100 { NULL, EXT_ATTR_LAST, NULL }
8103 /* Match a !GCC$ ATTRIBUTES statement of the form:
8104 !GCC$ ATTRIBUTES attribute-list :: var-name [, var-name] ...
8105 When we come here, we have already matched the !GCC$ ATTRIBUTES string.
8107 TODO: We should support all GCC attributes using the same syntax for
8108 the attribute list, i.e. the list in C
8109 __attributes(( attribute-list ))
8111 !GCC$ ATTRIBUTES attribute-list ::
8112 Cf. c-parser.c's c_parser_attributes; the data can then directly be
8115 As there is absolutely no risk of confusion, we should never return
8118 gfc_match_gcc_attributes (void)
8120 symbol_attribute attr;
8121 char name[GFC_MAX_SYMBOL_LEN + 1];
8126 gfc_clear_attr (&attr);
8131 if (gfc_match_name (name) != MATCH_YES)
8134 for (id = 0; id < EXT_ATTR_LAST; id++)
8135 if (strcmp (name, ext_attr_list[id].name) == 0)
8138 if (id == EXT_ATTR_LAST)
8140 gfc_error ("Unknown attribute in !GCC$ ATTRIBUTES statement at %C");
8144 if (gfc_add_ext_attribute (&attr, (ext_attr_id_t) id, &gfc_current_locus)
8148 gfc_gobble_whitespace ();
8149 ch = gfc_next_ascii_char ();
8152 /* This is the successful exit condition for the loop. */
8153 if (gfc_next_ascii_char () == ':')
8163 if (gfc_match_eos () == MATCH_YES)
8168 m = gfc_match_name (name);
8172 if (find_special (name, &sym, true))
8175 sym->attr.ext_attr |= attr.ext_attr;
8177 if (gfc_match_eos () == MATCH_YES)
8180 if (gfc_match_char (',') != MATCH_YES)
8187 gfc_error ("Syntax error in !GCC$ ATTRIBUTES statement at %C");