1/* IELR main implementation.
2
3   Copyright (C) 2009-2012 Free Software Foundation, Inc.
4
5   This file is part of Bison, the GNU Compiler Compiler.
6
7   This program is free software: you can redistribute it and/or modify
8   it under the terms of the GNU General Public License as published by
9   the Free Software Foundation, either version 3 of the License, or
10   (at your option) any later version.
11
12   This program is distributed in the hope that it will be useful,
13   but WITHOUT ANY WARRANTY; without even the implied warranty of
14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15   GNU General Public License for more details.
16
17   You should have received a copy of the GNU General Public License
18   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
19
20#ifndef IELR_H_
21# define IELR_H_
22
23#include <bitset.h>
24
25#include "state.h"
26
27/**
28 * \pre
29 *   - \c ::states is of size \c ::nstates and defines an LR(0) parser
30 *     for the users's grammar.
31 *   - \c ::ntokens is the number of tokens in the grammar.
32 * \post
33 *   - \c ::states is of size \c ::nstates (which might be greater than
34 *     <tt>::nstates \@pre</tt>) and defines the type of parser specified by
35 *     the value of the \c \%define variable \c lr.type.  Its value can be:
36 *     - \c "lalr".
37 *     - \c "ielr".
38 *     - \c "canonical-lr".
39 */
40void ielr (void);
41
42bool ielr_item_has_lookahead (state *s, symbol_number lhs, size_t item,
43                              symbol_number lookahead, state ***predecessors,
44                              bitset **item_lookahead_sets);
45
46#endif /* !IELR_H_ */
47