#   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/>.
#

# this is a new feature: expanding aliases when initially parsing command
# substitutions. required by posix, so enabled in posix mode. default mode
# stays backwards compatible.

shopt -s expand_aliases
set -o posix

alias switch=case

switch foo in foo) echo ok 1;; esac

echo $( switch foo in foo) echo ok 2;; esac )
echo "$( switch foo in foo) echo ok 3;; esac )"

echo $( switch foo in (foo) echo ok 4;; esac )
echo "$( switch foo in (foo) echo ok 5;; esac )"

alias nest='('

echo $( nest echo ok 6 ) )
echo "$( nest echo ok 7 ) )"

alias short='echo ok 8 )'

alias DO='{ '
alias DONE='}'
got=$(DO
echo ok 9; DONE)
echo "$got" 

echo $( short
echo "$( short "

# remember that short" won't work because you start a new quoting context
# inside $( and the token (`short') won't be delimited by the ending double
# quote, so there's no opportunity to perform the alias expansion that would
# terminate the command substitution