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starting at <http://lists.gnu.org/archive/html/bison-patches/2006-02/msg00064.html> and <http://lists.gnu.org/archive/html/bison-patches/2006-06/msg00091.html>. * NEWS (2.3+): Add a description of this feature to the default %destructor/%printer description. * doc/bison.texinfo (Freeing Discarded Symbols): Likewise. * src/symlist.c (symbol_list_destructor_set, symbol_list_printer_set): Invoke semantic_type_destructor_set or semantic_type_printer_set when a list node contains a semantic type. * src/symtab.c, src/symtab.h: Extend with a table that associates semantic types with their %destructor's and %printer's. (semantic_type_from_uniqstr, semantic_type_get, semantic_type_destructor_set, semantic_type_printer_set): New functions composing the public interface of that table. (symbol_destructor_get, symbol_destructor_location_get, symbol_printer_get, symbol_printer_location_get): If there's no per-symbol %destructor/%printer, look up the per-type before trying the default. * tests/actions.at (Per-type %printer and %destructor): New test case. * tests/input.at (Default %printer and %destructor redeclared): Extend to check that multiple occurrences of %symbol-default in a single %destructor/%printer declaration is an error. (Per-type %printer and %destructor redeclared, Unused values with per-type %destructor): New test cases.
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.