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When reporting useless rules and nonterminals, say "useless in grammar" instead of "useless", and say "useless in parser" instead of "never reduced". Discussed starting at <http://lists.gnu.org/archive/html/bison-patches/2007-10/msg00033.html>. * NEWS (2.3a+): Mention this change. * data/xslt/xml2text.xsl: Update output text and expected input XML element names to match changes below. * data/xslt/xml2xhtml.xsl: Likewise. (xsl:template match="bison-xml-report"): Add missing entry in Table of Contents: "Rules useless in parser due to conflicts". * doc/bison.texinfo (Decl Summary): Reword a little. (Understanding): Update example output for changes below. * src/gram.c: (rule_useful_p): Rename to... (rule_useful_in_grammar_p): ... this. (rule_useless_p): Rename to... (rule_useless_in_grammar_p): ... this. (rule_never_reduced_p): Rename to... (rule_useless_in_parser_p): ... this. (grammar_rules_print): Update for renames. (grammar_rules_print_xml): Update for renames. (grammar_rules_never_reduced_report): Rename to... (grammar_rules_useless_report): ... this since it is used for either kind of useless rule. * src/gram.h: Reword comments and update function names in prototypes. * src/main.c (main): Say "rule useless in parser due to conflicts". * src/print-xml.c (print_rules_never_reduced): Rename to... (print_rules_useless_in_parser): ... this, and rename output XML element "rules-never-reduced" to "rules-useless-in-parser". (print_xml): Update for rename. * src/print.c (print_results): Say "Rules useless in parser due to conflicts". * src/reduce.c (reduce_grammar_tables): Say "rule useless in grammar". (nonterminals_reduce): Say "nonterminal useless in grammar". (reduce_output): Say "Nonterminals useless in grammar". Say "Rules useless in grammar". (reduce_xml): Rename output XML element "useless" to "useless-in-grammar". (reduce_print): Don't report the count of grammatically useless rules as "rules never reduced" just because %yacc is specified. In the correct report of this count, say nonterminal(s) and rule(s) "useless in grammar". * tests/conflicts.at (S/R in initial): Update expected output. (Defaulted Conflicted Reduction): Likewise. (Unreachable States After Conflict Resolution): Likewise. * tests/existing.at (GNU pic Grammar): Likewise. * tests/reduce.at (Useless Nonterminals): Likewise. (Useless Rules): Likewise. (Reduced Automaton): Likewise. (Underivable Rules): Likewise. (Empty Language): Likewise.
-*- 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/>.