+# Bison Parser Headers. -*- 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([[Parser Headers.]])
+
+
+## ---------------------- ##
+## %union and --defines. ##
+## ---------------------- ##
+
+
+AT_SETUP([%union and --defines])
+
+AT_DATA([input.y],
+[%union
+{
+ int integer;
+ char *string ;
+}
+%%
+exp: {};
+])
+
+AT_CHECK([bison --defines input.y])
+
+AT_CLEANUP
+
+
+
+## --------------------- ##
+## Invalid CPP headers. ##
+## --------------------- ##
+
+# AT_TEST_CPP_GUARD_H([INPUT-FILE-BASE)
+# -------------------------------------
+m4_define([AT_TEST_CPP_GUARD_H],
+[AT_SETUP([Invalid CPP guards: $1])
+
+# Possibly create inner directories.
+dirname=`AS_DIRNAME([$1])`
+AS_MKDIR_P([$dirname])
+
+AT_DATA([$1.y],
+[%%
+dummy:
+])
+
+AT_CHECK([bison --defines=$1.h $1.y])
+
+# CPP should be happy with it.
+AT_CHECK([$CC -E $1.h], 0, [ignore])
+
+AT_CLEANUP
+])
+
+AT_TEST_CPP_GUARD_H([input/input])
+AT_TEST_CPP_GUARD_H([9foo])
+
+
+
+## ---------------- ##
+## export YYLTYPE. ##
+## ---------------- ##
+
+
+AT_SETUP([export YYLTYPE])
+
+AT_DATA([input.y],
+[%locations
+%{
+#include <stdio.h>
+#include <stdlib.h>
+
+static int
+yylex (void)
+{
+ return EOF;
+}
+
+static void
+yyerror (const char *msg)
+{
+ fprintf (stderr, "%s\n", msg);
+}
+
+%}
+%%
+exp:;
+])
+
+AT_CHECK([bison --defines input.y -o input.c])
+
+# YYLTYPE should be defined, and YYLLOC declared.
+AT_DATA([caller.c],
+[[#include "input.h"
+YYLTYPE *yyllocp = &yylloc;
+
+int yyparse (void);
+
+int
+main (void)
+{
+ return yyparse ();
+}
+]])
+
+# Link and execute, just to make sure everything is fine (and in
+# particular, that YYLLOC is indeed defined somewhere).
+AT_CHECK([$CC $CFLAGS $CPPFLAGS caller.c input.c -o caller], 0, [], [ignore])
+AT_CHECK([caller])
+
+AT_CLEANUP