-/* Type definitions for nondeterministic finite state machine for Bison.
+/* Type definitions for the finite state machine for Bison.
- Copyright (C) 1984, 1989, 2000, 2001, 2002, 2003, 2004, 2007 Free
- Software Foundation, Inc.
+ Copyright (C) 1984, 1989, 2000-2004, 2007, 2009-2015 Free Software
+ Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
- Bison is free software; you can redistribute it and/or modify
+ This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
- Bison is distributed in the hope that it will be useful,
+ This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with Bison; see the file COPYING. If not, write to
- the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* These type definitions are used to represent a nondeterministic
TRANSITIONS->states[Num]? Can be a token (amongst which the error
token), or non terminals in case of gotos. */
-#define TRANSITION_SYMBOL(Transitions, Num) \
+# define TRANSITION_SYMBOL(Transitions, Num) \
(Transitions->states[Num]->accessing_symbol)
/* Is the TRANSITIONS->states[Num] a shift? (as opposed to gotos). */
-#define TRANSITION_IS_SHIFT(Transitions, Num) \
+# define TRANSITION_IS_SHIFT(Transitions, Num) \
(ISTOKEN (TRANSITION_SYMBOL (Transitions, Num)))
/* Is the TRANSITIONS->states[Num] a goto?. */
-#define TRANSITION_IS_GOTO(Transitions, Num) \
+# define TRANSITION_IS_GOTO(Transitions, Num) \
(!TRANSITION_IS_SHIFT (Transitions, Num))
/* Is the TRANSITIONS->states[Num] labelled by the error token? */
-#define TRANSITION_IS_ERROR(Transitions, Num) \
+# define TRANSITION_IS_ERROR(Transitions, Num) \
(TRANSITION_SYMBOL (Transitions, Num) == errtoken->number)
/* When resolving a SR conflicts, if the reduction wins, the shift is
disabled. */
-#define TRANSITION_DISABLE(Transitions, Num) \
+# define TRANSITION_DISABLE(Transitions, Num) \
(Transitions->states[Num] = NULL)
-#define TRANSITION_IS_DISABLED(Transitions, Num) \
+# define TRANSITION_IS_DISABLED(Transitions, Num) \
(Transitions->states[Num] == NULL)
/* Iterate over each transition over a token (shifts). */
-#define FOR_EACH_SHIFT(Transitions, Iter) \
- for (Iter = 0; \
- Iter < Transitions->num \
- && (TRANSITION_IS_DISABLED (Transitions, Iter) \
- || TRANSITION_IS_SHIFT (Transitions, Iter)); \
- ++Iter) \
+# define FOR_EACH_SHIFT(Transitions, Iter) \
+ for (Iter = 0; \
+ Iter < Transitions->num \
+ && (TRANSITION_IS_DISABLED (Transitions, Iter) \
+ || TRANSITION_IS_SHIFT (Transitions, Iter)); \
+ ++Iter) \
if (!TRANSITION_IS_DISABLED (Transitions, Iter))
{
int num;
bitset *lookahead_tokens;
+ /* Sorted ascendingly on rule number. */
rule *rules[1];
} reductions;
| states. |
`---------*/
+struct state_list;
+
struct state
{
state_number number;
reductions *reductions;
errs *errs;
- /* Nonzero if no lookahead is needed to decide what to do in state S. */
+ /* When an includer (such as ielr.c) needs to store states in a list, the
+ includer can define struct state_list as the list node structure and can
+ store in this member a reference to the node containing each state. */
+ struct state_list *state_list;
+
+ /* If non-zero, then no lookahead sets on reduce actions are needed to
+ decide what to do in state S. */
char consistent;
/* If some conflicts were solved thanks to precedence/associativity,
a human readable description of the resolution. */
const char *solved_conflicts;
+ const char *solved_conflicts_xml;
- /* Conflict resolution sometimes makes states unreachable. Initialized to 0
- in state_new and then used by state_remove_unreachable_states after
- conflicts_solve. */
- bool reachable;
-
- /* Its items. Must be last, since ITEMS can be arbitrarily large.
- */
+ /* Its items. Must be last, since ITEMS can be arbitrarily large. Sorted
+ ascendingly on item index in RITEM, which is sorted on rule number. */
size_t nitems;
item_number items[1];
};
/* Create a new state with ACCESSING_SYMBOL for those items. */
state *state_new (symbol_number accessing_symbol,
- size_t core_size, item_number *core);
+ size_t core_size, item_number *core);
+state *state_new_isocore (state const *s);
/* Set the transitions of STATE. */
void state_transitions_set (state *s, int num, state **trans);
/* Print on OUT all the lookahead tokens such that this STATE wants to
reduce R. */
void state_rule_lookahead_tokens_print (state *s, rule *r, FILE *out);
+void state_rule_lookahead_tokens_print_xml (state *s, rule *r,
+ FILE *out, int level);
/* Create/destroy the states hash table. */
void state_hash_new (void);
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