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520181ab91
parser, and clean up related code a bit. * tests/glr-regression.at (Leaked merged semantic value if user action cuts parse) Rename to... (Leaked semantic values if user action cuts parse) ... this. Add check for leaked parent RHS values. * data/glr.c (yydestroyGLRState): In debugging output, distinguish between an unresolved state (non-empty chain of semantic options) and an incomplete one (signaled by an empty chain). (yyresolveStates): Document the interface. Move all manipulation of an successfully or unsuccessfully resolved yyGLRState to... (yyresolveValue): ... here so that yyresolveValue always leaves a yyGLRState with consistent data and thus is easier to understand. Remove the yyvalp and yylocp parameters since they are always just taken from the yys parameter. When reporting a discarded merged value in debugging output, note that it is incompletely merged. Document the interface. (yyresolveAction): If resolving any of the RHS states fails, destroy them all rather than leaking them. Thus, as long as user actions are written to clean up the RHS correctly, yyresolveAction always cleans up the RHS of a semantic option. Document the interface.
-*- 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.