mirror of
https://git.savannah.gnu.org/git/bison.git
synced 2026-03-09 12:23:04 +00:00
5967f0cf59
report rules that are then unused, and don't report conflicts in those states. * src/conflicts.c, src/conflicts.h (conflicts_update_state_numbers): New global function. * src/lalr.c, src/lalr.h (lalr_update_state_numbers): New global function. * src/main.c (main): After conflict resolution, remove the unreachable states and update all data structures that reference states by number. * src/state.c (state_new): Initialize each state's reachable member to false. (state_mark_reachable_states): New static function. (state_remove_unreachable_states): New global function. * src/state.h (struct state): Add member bool reachable. (state_remove_unreachable_states): Prototype. * tests/conflicts.at (Unreachable States After Conflict Resolution): New test case. * tests/existing.at (GNU pic Grammar): Update test case output now that an unused rule is discovered.
This directory contains the Bison parser generator. See the file INSTALL for generic compilation and installation instructions. See the file doc/FAQ for frequently asked questions. Bison requires GNU m4 1.4.3 or later. See: ftp://ftp.gnu.org/gnu/m4/m4-1.4.3.tar.gz Bison can work with pre-1.4.3 distributions of GNU m4 if they are sufficiently patched, but if you encounter a bug with an older distribution and report a bug we will probably suggest that you upgrade to 1.4.3 as the first step in trying to fix it. Please send bug reports to <bug-bison@gnu.org>. Please include the version number from `bison --version', and a complete, self-contained test case in each bug report. If you have questions about using Bison and the documentation does not answer them, please send mail to <help-bison@gnu.org>. ----- Copyright (C) 1992, 1998, 1999, 2003, 2004, 2005 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 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. Bison 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 autoconf; see the file COPYING. If not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.