#   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/>.
#
x=x
e=

recho ${x:+""}
recho ${x:+ ""}
recho ${x:+"" }
recho ${x:+"$e"}
recho ${x:+ "$e"}
recho ${x:+"$e""$e"""}
recho ${x:+"$e""$e"""}
recho ${x:+"$e" "$e"""}
recho ${x:+"$e""$e" ""}
recho ${x:+ "$e""$e"""}

echo =====
recho ${x:+''}
recho ${x:+ ''}
recho ${x:+'' }
recho ${x:+'' ''}

recho ${x:+$e''}
recho ${x:+''$e}

recho ${x:+''$e $e''}

echo =====
recho ${x:+"$(:)"}
recho ${x:+ "$(:)"}
recho ${x:+"$(:)""$(:)"""}
recho ${x:+"$(:)""$(:)"""}
recho ${x:+"$(:)" "$(:)"""}
recho ${x:+"$(:)""$(:)" ""}
recho ${x:+ "$(:)""$(:)"""}

echo =====
recho ${x:+"`:`"}
recho ${x:+ "`:`"}
recho ${x:+"`:`""`:`"""}
recho ${x:+"`:`""`:`"""}
recho ${x:+"`:`" "`:`"""}
recho ${x:+"`:`""`:`" ""}
recho ${x:+ "`:`""`:`"""}