#! /bin/sh

# Copyright (C) 2018-2021 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 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, see <https://www.gnu.org/licenses/>.

(seq 0) >/dev/null 2>&1 || skip "gimme one seq"

cat >input <<EOF
1+2*3
EOF
run 0 '7'

cat >input <<EOF
(1+2) * 3
EOF
run 0 '9'
run -noerr 0 '9' -p

cat >input <<EOF
(((1)+(2))*((3)+(4)))
EOF
run 0 '21'

# Some really deep computation.
# for 4, gives 4 + (3 + (2 + (1 + (- (4 * (4 + 1)) / 2)))).
n=100
for i in $(seq 0 $n)
do
    if [ "$i" -eq 0 ]; then
        input="- ($n * ($n + 1)) / 2"
    else
        input="$i + ($input)"
    fi
done
echo "$input" > input
run 0 '0'

cat >input <<EOF
() + ()
EOF
run 1 'err: syntax error, unexpected end-of-file, expecting + or - or number or string'

cat >input <<EOF
1 + $
EOF
run 1 'err: syntax error, invalid character: $
err: syntax error, unexpected end-of-line, expecting + or - or number or string'