#   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 <http://www.gnu.org/licenses/>.
#
HISTFILE=$TMPDIR/bashhist-$$

set -o history
set -o histexpand

echo a
cat < <(echo !!)

echo b
echo !! `echo !!`

echo c
echo "$(echo "!" )"

echo d
echo "$(echo '!' )"

echo e
echo '!' "!"
echo "'!'"

set +o history
rm -f $HISTFILE