X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/8a86eef0fa29d277dc0eae1892ea94c48c3e2ba2..3a2803df74bf43b384db752e87be94a1f64fa847:/data/glr.c

diff --git a/data/glr.c b/data/glr.c
index 410c4500..f8a32a82 100644
--- a/data/glr.c
+++ b/data/glr.c
@@ -1,30 +1,25 @@
                                                                     -*- C -*-
 
 # GLR skeleton for Bison
-# Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation,
+# Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation,
 # Inc.
 
-# This program is free software; you can redistribute it and/or modify
+# 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 2 of the License, or
+# 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, write to the Free Software
-# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
-# 02110-1301  USA
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 
 m4_include(b4_pkgdatadir/[c.m4])
 
-b4_push_if([
-b4_complain([[non-deterministic push parsers are not yet supported]])])
-
 ## ---------------- ##
 ## Default values.  ##
 ## ---------------- ##
@@ -39,6 +34,13 @@ m4_define_default([b4_stack_depth_init],  [200])
 ## Pure/impure interfaces.  ##
 ## ------------------------ ##
 
+b4_define_flag_if([pure])
+# If glr.cc is including this file and thus has already set b4_pure_flag, don't
+# change the value of b4_pure_flag, and don't record a use of api.pure.
+m4_ifndef([b4_pure_flag],
+[b4_percent_define_default([[api.pure]], [[false]])
+ m4_define([b4_pure_flag],
+           [b4_percent_define_flag_if([[api.pure]], [[1]], [[0]])])])
 
 # b4_user_formals
 # ---------------
@@ -107,7 +109,15 @@ m4_define([b4_pure_formals],
 # --------------------
 # Expansion of $<TYPE>$.
 m4_define([b4_lhs_value],
-[((*yyvalp)[]m4_ifval([$1], [.$1]))])
+[b4_symbol_value([(*yyvalp)], [$1])])
+
+
+# b4_rhs_data(RULE-LENGTH, NUM)
+# -----------------------------
+# Expand to the semantic stack place that contains value and location
+# of symbol number NUM in a rule of length RULE-LENGTH.
+m4_define([b4_rhs_data],
+[((yyGLRStackItem const *)yyvsp)@{YYFILL (($2) - ($1))@}.yystate])
 
 
 # b4_rhs_value(RULE-LENGTH, NUM, [TYPE])
@@ -115,7 +125,7 @@ m4_define([b4_lhs_value],
 # Expansion of $<TYPE>NUM, where the current rule has RULE-LENGTH
 # symbols on RHS.
 m4_define([b4_rhs_value],
-[(((yyGLRStackItem const *)yyvsp)@{YYFILL (($2) - ($1))@}.yystate.yysemantics.yysval[]m4_ifval([$3], [.$3]))])
+[b4_symbol_value([b4_rhs_data([$1], [$2]).yysemantics.yysval], [$3])])
 
 
 
@@ -135,7 +145,7 @@ m4_define([b4_lhs_location],
 # Expansion of @NUM, where the current rule has RULE-LENGTH symbols
 # on RHS.
 m4_define([b4_rhs_location],
-[(((yyGLRStackItem const *)yyvsp)@{YYFILL (($2) - ($1))@}.yystate.yyloc)])
+[(b4_rhs_data([$1], [$2]).yyloc)])
 
 
 
@@ -146,7 +156,7 @@ m4_define([b4_rhs_location],
 # We do want M4 expansion after # for CPP macros.
 m4_changecom()
 m4_divert_push(0)dnl
-@output(b4_parser_file_name@)
+@output(b4_parser_file_name@)@
 b4_copyright([Skeleton implementation for Bison GLR parsers in C],
   [2002, 2003, 2004, 2005, 2006])
 [
@@ -2635,7 +2645,7 @@ dnl glr.cc produces its own header.
 dnl
 m4_if(b4_skeleton, ["glr.c"],
 [b4_defines_if(
-[@output(b4_spec_defines_file@)
+[@output(b4_spec_defines_file@)@
 b4_copyright([Skeleton interface for Bison GLR parsers in C],
   [2002, 2003, 2004, 2005, 2006])