mirror of
https://git.savannah.gnu.org/git/bison.git
synced 2026-03-09 20:33:03 +00:00
9611cfa20b
* data/bison.m4 (b4_percent_define_flag_if): Correct comments on how values are interpreted. * doc/bison.texinfo (Decl Summary): Clean up and extend %define documentation a little more. * src/muscle_tab.c (MUSCLE_USER_NAME_CONVERT, muscle_percent_define_insert, muscle_percent_code_grow): New functions/macros. * src/muscle_tab.h (muscle_percent_define_insert, muscle_percent_code_grow): Prototype. * src/parse-gram.y (prologue_declaration): Use muscle_percent_define_insert and muscle_percent_code_grow when parsing %define and %code directives. Make it easy to share %define boolean variables between the front-end and back-end. Though not used yet, this will be useful in the future. * data/bison.m4 (b4_check_user_names): Rewrite comments to talk about Bison uses of names rather than just skeleton uses of names. (b4_percent_define_get, b4_percent_define_ifdef): Rename b4_percent_define_skeleton_variables(VARIABLE) to b4_percent_define_bison_variables(VARIABLE). (b4_percent_code_get, b4_percent_code_ifdef): Rename b4_percent_code_skeleton_qualifiers(QUALIFIER) to b4_percent_code_bison_qualifiers(QUALIFIER). (b4_check_user_names_wrap): Update for renames. * src/muscle_tab.c, src/muscle_tab.h (muscle_percent_define_flag_if, muscle_percent_define_default): New functions mimicking b4_percent_define_flag_if and b4_percent_define_default. For %define variables, report locations for invalid values and redefinitions. * data/bison.m4 (b4_percent_define_flag_if): Read b4_percent_define_loc(VARIABLE) to report the location of an invalid value for VARIABLE. (b4_percent_define_default): Save a special location in b4_percent_define_loc(VARIABLE) in case the default value for VARIABLE must later be reported as invalid. * src/muscle_tab.c (muscle_location_grow, muscle_location_decode): New functions. (muscle_percent_define_insert): Record the location of VARIABLE in muscle percent_define_loc(VARIABLE), and use it to report the previous location for a redefinition. (muscle_percent_define_flag_if): Update like b4_percent_define_flag_if. (muscle_percent_define_default): Update like b4_percent_define_default. (muscle_grow_user_name_list): Rename to... (muscle_user_name_list_grow): ... this for consistency and use muscle_location_grow. * src/muscle_tab.h (muscle_location_grow): Prototype. * tests/input.at (%define errors): Update expected output. * tests/skeletons.at (%define boolean variables: invalid skeleton defaults): 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. 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.