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* data/bison.m4 (b4_cat): New. (b4_error, b4_error_at): Use b4_cat to send error directives directly to stdout so they don't become arguments to other macros. Update comments and add examples. (b4_warn, b4_warn_at, b4_complain, b4_complain_at): Update comments and add examples. (b4_fatal, b4_fatal_at): Likewise, and invoke m4_exit(1) immediately after printing the error directive so that M4 doesn't report subsequent problems that are induced by this problem. * src/scan-skel.l: Recognize @` digraph outside of directive arguments instead of just in them. Recognize @\n in both places. Both expand to the empty string. Needed by b4_cat. * tests/skeletons.at (Complaining during macro argument expansion): New test case. (Fatal errors make M4 exit immediately): New test case.
-*- 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. 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/>.