Remove the so called hairy (semantic) parsers.

* src/system.h (EXT_GUARD_C, EXT_STYPE_H): Remove.
* src/gram.h, src/gram.c (semantic_parser): Remove.
(rule_t): Remove the guard and guard_line members.
* src/lex.h (token_t): remove tok_guard.
* src/options.c (option_table): Remove %guard and %semantic_parser
support.
* src/output.c, src/output.h (guards_output): Remove.
(prepare): Adjust.
(token_definitions_output): Don't output the `T'
tokens (???).
(output_skeleton): Don't output the guards.
* src/files.c, src/files.c (attrsfile): Remove.
* src/reader.c (symbol_list): Remove the guard and guard_line
members.
Adjust dependencies.
(parse_guard): Remove.
* data/bison.hairy: Remove.
* doc/bison.texinfo (Environment Variables): Remove occurrences of
BISON_HAIRY.

tests/Makefile.am

@@ -1,7 +1,7 @@
 ## Process this file with automake to create Makefile.in.
 
 ## Makefile for Bison testsuite.
-## Copyright 2000, 2001, 2002  Free Software Foundation, Inc.
+## Copyright (C) 2000, 2001, 2002  Free Software Foundation, Inc.
 
 ## 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
@@ -49,8 +49,7 @@ TESTSUITE_AT = \
 	output.at sets.at reduce.at \
 	synclines.at headers.at actions.at conflicts.at \
 	calc.at \
-        torture.at existing.at regression.at \
-        semantic.at
+        torture.at existing.at regression.at
 
 TESTSUITE = $(srcdir)/testsuite
 

tests/semantic.at

@@ -1,47 +0,0 @@
-# Bison Semantic Parsers.                               -*- Autotest -*-
-# Copyright 2001 Free Software Foundation, Inc.
-
-# 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, 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., 59 Temple Place - Suite 330, Boston, MA
-# 02111-1307, USA.
-
-AT_BANNER([[Semantic Parsers.]])
-
-# Well, nothing, or almost, is known about semantic parsers.  For the
-# time being, just make sure we still parse them properly.
-
-## ---------------- ##
-## Parsing Guards.  ##
-## ---------------- ##
-
-
-AT_SETUP([Parsing Guards])
-
-AT_DATA([input.y],
-[[%semantic-parser
-%union {
-  int ival;
-}
-%token <ival> INT
-%type  <ival> exp
-%%
-exp: exp '+' exp { $$ = $1 + $3 }
-   | exp '/' exp %guard { if ($3 == 0) yyerror = 1 } { $$ = $1 / $3 }
-   | INT;
-%%
-]])
-
-AT_CHECK([bison -v input.y -o input.c], 0, ignore, ignore)
-
-AT_CLEANUP

tests/testsuite.at

@@ -61,6 +61,3 @@ m4_include([existing.at])
 
 # Some old bugs.
 m4_include([regression.at])
-
-# Exercising bison.hairy, before it gets really removed...
-m4_include([semantic.at])