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YYSTYPE if your grammar contains at least one <type> tag. Your YYSTYPE need not be a macro; it can be a typedef. * doc/bison.texinfo (Value Type, Multiple Types, Location Type): (Union Decl, Decl Summary): Document this. * data/glr.c (YYSTYPE): Implement this. * data/glr.cc (YYSTYPE): Likewise. * data/lalr1.cc (YYSTYPE): Likewise. * data/yacc.c (YYSTYPE): Likewise. * src/output.c (prepare): Output tag_seen_flag. * src/parse-gram.y (declaration, grammar_declaration): Use 'union_seen' rather than 'typed' to determine whether %union has been seen, since grammars can now be typed without %union. (symbol_declaration, type.opt, symbol_def): Keep track of whether a tag has been seen. * src/reader.c (union_seen, tag_seen): New vars. (typed): remove. * src/reader.h (union_seen, tag_seen, typed): Likewise. * src/scan-code.l (untyped_var_seen): New variable. (handle_action_dollar): Adjust to above changes. (handle_action_dollar, handle_action_at): Improve overflow checking for outlandish numbers. * tests/input.at (AT_CHECK_UNUSED_VALUES): Redo test to avoid new diagnostics generated by above changes. * tests/regression.at (YYSTYPE typedef): Add test to check for type tags without %union.
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.