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instead of passing a yylexp argument to yypull_parse, and don't generate yypull_parse or yyparse unless %push-pull-parser is declared. Discussed starting at <http://lists.gnu.org/archive/html/bison-patches/2006-12/msg00163.html>. * data/bison.m4 (b4_pull_if): New. * data/c.m4 (b4_identification): Define YYPULL similar to YYPUSH. * data/push.c: Improve M4 quoting a little. (b4_generate_macro_args, b4_parenthesize): Remove. (yyparse): If there's a b4_prefix, #define this to b4_prefix[parse] any time a pull parser is requested. Don't #define this as a wrapper around yypull_parse. Instead, when both push and pull are requested, make it a function that does that same thing. (yypull_parse): If there's a b4_prefix, #define this to b4_prefix[pull_parse] when both push and pull are requested. Don't define this as a function unless both push and pull are requested. Remove the yylexp argument and hard-code yylex invocation instead. * etc/bench.pl.in (bench_grammar): Use %push-pull-parser instead of %push-parser. * src/getargs.c (pull_parser): New global initialized to true. * getargs.h (pull_parser): extern it. * src/output.c (prepare): Insert pull_flag muscle. * src/parse-gram.y (PERCENT_PUSH_PULL_PARSER): New token. (prologue_declaration): Set both push_parser and pull_parser = true for %push-pull-parser. Set push_parser = true and pull_parser = false for %push-parser. * src/scan-gram.l: Don't accept %push_parser as an alternative to %push-parser since there's no backward-compatibility concern here. Scan %push-pull-parser. * tests/calc.at (Simple LALR(1) Calculator): Use %push-pull-parser instead of %push-parser. * tests/headers.at (export YYLTYPE): Make yylex static, and don't prototype it in the module that calls yyparse. * tests/input.at (Torturing the Scanner): Likewise. * tests/local.at (AT_PUSH_IF): Check for %push-pull-parser as well.
-*- outline -*- This directory contains Bison skeletons: the general shapes of the different parser kinds, that are specialized for specific grammars by the bison program. Currently, there are only three supported skeletons: - 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. It is still very experimental, and not yet supported. Please, subscribe to bison-patches@gnu.org. - glr.c A Generalized LR C parser based on Bison's LALR(1) tables. 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. ----- Copyright (C) 2002 Free Software Foundation, Inc. This file is part of GNU Bison. GNU 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. GNU 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 Bison; see the file COPYING. If not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.