#!/bin/sh
# -*- coding: utf-8 -*-
# Copyright (C) 2012, 2017 Laboratoire de Recherche et Développement de
# l'Epita (LRDE).
#
# This file is part of Spot, a model checking library.
#
# Spot 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 3 of the License, or
# (at your option) any later version.
#
# Spot 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, see <http://www.gnu.org/licenses/>.

. ./defs || exit 1

set -e

cat >input <<EOF
(a < b) U (b == c - 1)
((a < b) U {b == c - 1})
(((a < b) U (b == c - 1)))
(((((a < b))) U (b == c - 1)))
(((a < b) U (((b == c - 1)))))
(((a < b ) U ({(  b == c - 1  )})))
(((((  a < b))) U ( b == c - 1)))
(((((  a < b))) U { b == c - 1}!))
()a
EOF

cat >expected <<EOF
"a < b" U "b == c - 1"
"a < b" U "b == c - 1"
"a < b" U "b == c - 1"
"a < b" U "b == c - 1"
"a < b" U "b == c - 1"
"a < b" U "b == c - 1"
"a < b" U "b == c - 1"
"a < b" U "b == c - 1"
Xa
EOF

run 0 ltlfilt --lenient input > output
cmp output expected



run 2 ltlfilt --lenient -f 'F( )' 2> stderr
grep 'unexpected empty block' stderr
