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fca9c5eff1
Stop equating LR(0) with nondeterminism and LALR(1) with
determinism. That is, if all states are consistent, then LR(0)
tables are deterministic. On the other hand, LALR(1) tables
might be nondeterministic before conflict resolution, and GLR
permits LALR(1) tables to remain nondeterministic.
* src/LR0.c, src/LR0.h: Here.
* src/lalr.c, src/lalr.h: Here.
* src/main.c (main): Here.
* src/state.c, src/state.h: Here.
* src/ielr.h (ielr): In preconditions, expect LR(0) not LALR(1)
parser tables.
(cherry picked from commit 1c4ad777cb)
47 lines
1.6 KiB
C
47 lines
1.6 KiB
C
/* IELR main implementation.
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Copyright (C) 2009-2010 Free Software Foundation, Inc.
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This file is part of Bison, the GNU Compiler Compiler.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef IELR_H_
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# define IELR_H_
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#include <bitset.h>
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#include "state.h"
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/**
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* \pre
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* - \c ::states is of size \c ::nstates and defines an LR(0) parser
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* for the users's grammar.
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* - \c ::ntokens is the number of tokens in the grammar.
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* \post
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* - \c ::states is of size \c ::nstates (which might be greater than
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* <tt>::nstates \@pre</tt>) and defines the type of parser specified by
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* the value of the \c \%define variable \c lr.type. Its value can be:
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* - \c "lalr".
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* - \c "ielr".
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* - \c "canonical-lr".
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*/
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void ielr (void);
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bool ielr_item_has_lookahead (state *s, symbol_number lhs, size_t item,
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symbol_number lookahead, state ***predecessors,
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bitset **item_lookahead_sets);
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#endif /* !IELR_H_ */
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