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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.
-*- outline -*- This directory contains data needed by Bison. * Skeletons Bison skeletons: the general shapes of the different parser kinds, that are specialized for specific grammars by the bison program. Currently, the supported skeletons are: - yacc.c It used to be named bison.simple: it corresponds to C Yacc compatible LALR(1) parsers. - lalr1.cc Produces a C++ parser class. - lalr1.java Produces a Java parser class. - glr.c A Generalized LR C parser based on Bison's LALR(1) tables. - glr.cc A Generalized LR C++ parser. Actually a C++ wrapper around glr.c. These skeletons are the only ones supported by the Bison team. Because the interface between skeletons and the bison program is not finished, *we are not bound to it*. In particular, Bison is not mature enough for us to consider that ``foreign skeletons'' are supported. * m4sugar This directory contains M4sugar, sort of an extended library for M4, which is used by Bison to instantiate the skeletons. * xslt This directory contains XSLT programs that transform Bison's XML output into various formats. - bison.xsl A library of routines used by the other XSLT programs. - xml2dot.xsl Conversion into GraphViz's dot format. - xml2text.xsl Conversion into text. - xml2xhtml.xsl Conversion into XHTML. ----- Copyright (C) 2002, 2008, 2009, 2010 Free Software Foundation, Inc. This file is part of GNU Bison. 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/>.