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* NEWS (2.5): Document. * data/yacc.c (yysyntax_error): In a verbose syntax error message while in a consistent state with a default action (which must be an error action given that yysyntax_error is being invoked), continue to drop the expected token list, but don't drop the unexpected token unless there actually is no lookahead. Moreover, handle that internally instead of returning 1 to tell the caller to do it. With that meaning of 1 gone, renumber return codes more usefully. (yyparse, yypush_parse): Update yysyntax_error usage. Most importantly, set yytoken to YYEMPTY when there's no lookahead. * data/glr.c (yyreportSyntaxError): As in yacc.c, don't drop the unexpected token unless there actually is no lookahead. * data/lalr1.cc (yy::parser::parse): If there's no lookahead, pass yyempty_ not yyla.type to yysyntax_error_. (yy::parser::yysyntax_error_): Again, don't drop the unexpected token unless there actually is no lookahead. * data/lalr1.java (YYParser::parse): If there's no lookahead, set yytoken to yyempty_ before invoking yysyntax_error. (YYParser::yysyntax_error): Again, don't drop the unexpected token unless there actually is no lookahead. * tests/conflicts.at (parse.error=verbose and consistent errors): Extend test group to further reveal how the previous use of the simple "syntax error" message was too general. Test yacc.c, glr.c, lalr1.cc, and lalr1.java. No longer an expected failure. * tests/java.at (AT_JAVA_COMPILE, AT_JAVA_PARSER_CHECK): Move to... * tests/local.at: ... here. (_AT_BISON_OPTION_PUSHDEFS): Push AT_SKEL_JAVA_IF definition. (AT_BISON_OPTION_POPDEFS): Pop it. (AT_FULL_COMPILE): Extend to handle Java.
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:
ftp://ftp.gnu.org/gnu/m4/m4-1.4.6.tar.gz
** Internationalization
Bison supports two catalogues: 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
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If you have questions about using Bison and the documentation does
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* Bug reports
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test case in each bug report.
Local Variables:
mode: outline
End:
-----
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it under the terms of the GNU General Public License as published by
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