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84276bc3d5
Commit90a8537e62was right, but issued two error messages. Commit80ef7e7639tried to address that by mapping yychar and yytoken to empty, but that completely breaks the invariants of glr.c. In particular, yygetToken can be called repeatedly and is expected to return the latest result, unless yytoken is YYEMPTY. Since the previous attempt was "recording" that the token was coming from an exception by setting it to YYEMPTY, instead of getting again the faulty token, we fetched another one. Rather, revert to the first approach: map yytoken to "invalid token", but record in yychar the fact that we come from an exception thrown in the scanner. * data/skeletons/glr.c (YYFAULTYTOK): New. (yygetToken): Use it to record syntax errors from the scanner. * tests/c++.at (Syntax error as exception): In addition to checking syntax_error with error recovery, make sure it also behaves as expected without.
This package contains the GNU Bison parser generator.
* Installation
** Build
See the file INSTALL for generic compilation and installation instructions.
Bison requires GNU m4 1.4.6 or later. See:
https://ftp.gnu.org/gnu/m4/m4-1.4.6.tar.gz
** Relocatability
If you pass '--enable-relocatable' to 'configure', Bison is relocatable.
A relocatable program can be moved or copied to a different location on the
file system. It can also be used through mount points for network sharing.
It is possible to make symlinks to the installed and moved programs, and
invoke them through the symlink.
See "Enabling Relocatability" in the documentation.
** Internationalization
Bison supports two catalogs: one for Bison itself (i.e., for the
maintainer-side parser generation), and one for the generated parsers (i.e.,
for the user-side parser execution). The requirements between both differ:
bison needs ngettext, the generated parsers do not. To simplify the build
system, neither are installed if ngettext is not supported, even if
generated parsers could have been localized. See
http://lists.gnu.org/archive/html/bug-bison/2009-08/msg00006.html for more
details.
* Questions
See the section FAQ in the documentation (doc/bison.info) for frequently
asked questions. The documentation is also available in PDF and HTML,
provided you have a recent version of Texinfo installed: run "make pdf" or
"make html".
If you have questions about using Bison and the documentation does not
answer them, please send mail to <help-bison@gnu.org>.
* Bug reports
Please send bug reports to <bug-bison@gnu.org>. Be sure to include the
version number from 'bison --version', and a complete, self-contained test
case in each bug report.
* Copyright statements
For any copyright year range specified as YYYY-ZZZZ in this package, note
that the range specifies every single year in that closed interval.
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Copyright (C) 1992, 1998-1999, 2003-2005, 2008-2015, 2018 Free Software
Foundation, Inc.
This file is part of GNU bison, the GNU Compiler Compiler.
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 3 of the License, or
(at your option) any later version.
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 this program. If not, see <http://www.gnu.org/licenses/>.
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# LocalWords: MERCHANTABILITY