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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/>.
#
# 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
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