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file and the glr.c header and code files, move the pre-prologue before the token definitions. Add new %before-definitions and %after-definitions to declare code that will go in both the header file and code file. Discussed at <http://lists.gnu.org/archive/html/bison-patches/2005-12/msg00000.html>, <http://lists.gnu.org/archive/html/bison-patches/2006-01/msg00016.html>, and <http://lists.gnu.org/archive/html/bison-patches/2006-06/msg00055.html>. * NEWS (2.3+): Describe these changes. * data/glr.c (b4_pre_prologue): Move from within to before... (b4_shared_declarations): ... this. Add new b4_before_definitions before b4_token_enums. Add new b4_after_definitions at the end. * data/glr.cc (b4_pre_prologue): Replace with... (b4_before_definitions): ... this in the header file. (b4_after_definitions): New near the end of the header file. * data/lalr1.cc (b4_pre_prologue): Move from the header file to the code file right before including the header file. (b4_before_definitions): New in the previous position of b4_pre_prologue in the header file. (b4_after_definitions): New near the end of the header file. * data/yacc.c: Clean up some m4 quoting especially in the header file. (b4_token_enums_defines): In the code file, move to right before YYSTYPE for consistency with the header file. (b4_before_definitions): New right before b4_token_enums_defines in both the header and code file. (b4_after_definitions): New right after YYLTYPE and yylloc in both the header and code file. * doc/bison.texinfo (Prologue): Show use of %before-definitions instead of prologues for %union dependencies. (Bison Declaration Summary): In %defines description, mention the effect of %before-definitions and %after-definitions on the header file. (Calc++ Parser): Forward declare driver in a %before-definitions rather than in the pre-prologue so that make check succeeds. (Bison Symbols): Add entries for %before-definitions and %after-definitions. * src/parse-gram.y (PERCENT_BEFORE_DEFINITIONS): New token for %before-definitions. (PERCENT_AFTER_DEFINITIONS): New token for %after-definitions. (declaration): Parse those declarations and append to b4_before_definitions and b4_after_definitions, respectively. * src/reader.c (before_definitions, after_definitions): New bools to track whether those declarations have been seen. (prologue_augment): Add to the post-prologue if %union, %before-definitions, or %after-definitions has been seen. * src/reader.h (before_definitions, after_definitions): New extern's. * src/scan-gram.l: Scan the new declarations. * tests/actions.at (_AT_CHECK_PRINTER_AND_DESTRUCTOR): Place the second prologue block in a %before-definitions or a %after-definitions based on whether the %union is declared. * tests/regression.at (Early token definitions with --yacc, Early token definitions without --yacc): Move tests for token definitions into the post-prologue since token names are no longer defined in the pre-prologue.
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.