1/* IELR main implementation.
2
3 Copyright (C) 2009-2015, 2018-2019 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