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# 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/>.
#
# expansions involving patterns
var='[hello'
echo "${var//[/}"
red='\[\e[0;31m\]'
printf "%s\n" "${red//\\[\\e/}"
foo="${red//\\[\\e/}"
# foo == [0;31m\]
printf "%s\n" "${foo//[0;31m\\/}"
echo "${var//[]/}"
echo "${red//[]/}"
v=hello
foo='[:alpha:]'
echo ${v//[[:alpha:]]/}
echo ${v//[[:alpha]]/}
echo ${v//[[:alpha]/}
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