mirror of
https://git.savannah.gnu.org/git/bison.git
synced 2026-03-09 12:23:04 +00:00
bf70fa8729
use during nondeterministic operation to track which stacks have actually needed the current lookahead. (yyinitStateSet, yyfreeStateSet, yyremoveDeletes, yysplitStack): Allocate, deallocate, resize, and otherwise shuffle space for yylookaheadStatuses in parallel with yystates member of yyGLRStateSet. (yysplitStack, yyprocessOneStack, yyparse): Set lookahead status appropriately during nondeterministic operation. (yySemanticOption): Add int yyrawchar, YYSTYPE yyval, and YYLTYPE yyloc members to store the current lookahead to be used by the deferred user action. (yyaddDeferredAction): Add size_t yyk parameter specifying the stack from which the RHS is taken. Set the lookahead members of the new yySemanticOption according to the lookahead status for stack yyk. (yyglrShiftDefer, yyglrReduce): Pass yyk parameter on to yyaddDeferredAction. (yyresolveAction): Set yychar, yylval, and yylloc to the lookahead members of yySemanticOption before invoking yyuserAction, and then set them back to their current values afterward. (yyparse): Set yychar = YYEMPTY where yytoken = YYEMPTY. (yyreportAmbiguity): Add /*ARGSUSED*/ to pacify lint. * tests/glr-regression.at: Remove `.' from the ends of recent test case titles for consistency. (Leaked merged semantic value if user action cuts parse): In order to suppress lint warnings, use arguments in merge function, and assign char value < 128 in main. (Incorrect lookahead during deterministic GLR): New test case. (Incorrect lookahead during nondeterministic GLR): 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.