#   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/>.
#

# first, let's start with the basics

recho "$@"
recho "$*"

recho $@
recho $*

foo=$*
foo=$@

foo="$*"
foo="$@"

unset -v bar

foo=${bar:-$*}
foo=${bar:-$@}

foo=${bar:-"$*"}
foo=${bar:-"$@"}

foo=${!*}
foo=${!@}

set a b

recho "$*"

# If IFS is null, the parameters are joined without separators
IFS=''
recho "$*"

# If IFS is unset, the parameters are separated by spaces
unset IFS
recho "${*}"

recho "$@"
recho $@

IFS='/'
set bob 'tom dick harry' joe
set $*
recho $#
recho $1
recho $2
recho $3

set bob 'tom dick harry' joe
set ${*}
recho $#
recho $1
recho $2
recho $3

set bob 'tom dick harry' joe
set $@
recho $#
recho $1
recho $2
recho $3

set bob 'tom dick harry' joe
set ${@}
recho $#
recho $1
recho $2
recho $3

# according to POSIX.2, unquoted $* should expand to multiple words if
# $IFS is null, just like unquoted $@
IFS=''
set bob 'tom dick harry' joe
set $*
recho $#
recho $1
recho $2
recho $3

set bob 'tom dick harry' joe
set $@
recho $#
recho $1
recho $2
recho $3

# if IFS is unset, the individual positional parameters are split on
# " \t\n" if $* or $@ are unquoted
unset IFS
set bob 'tom dick harry' joe
set $*
recho $#
recho $1
recho $2
recho $3

set bob 'tom dick harry' joe
set $@  
recho $#                                              
recho $1
recho $2
recho $3

# but not for "$@" or "$*"
set bob 'tom dick harry' joe
set "$*"
recho $#
recho $1
recho $2
recho $3

set bob 'tom dick harry' joe
set "$@"
recho $#
recho $1
recho $2
recho $3

# POSIX.2 says these should both expand the positional parameters
# to multiple words
set a b c d e
IFS=""
recho $@
recho "$@"

# this example is straight from the POSIX.2 rationale
set foo bar bam

recho "$@"
recho "$*"

unset IFS

recho "$@"
recho $@
recho "$*"

IFS=:

# special variables
set -- 1 2 3 4 5 6 7 8 9 10

bar=${*}
foo=$*
echo foo = "$foo"
echo bar = "$bar"

foo1=$@
bar1=${@}

echo foo1 = "$foo1"
echo bar1 = "$bar1"

foo2="$*"
bar2="${*}"

echo foo2 = "$foo2"
echo bar2 = "$bar2"

eval foo3='$*' bar3='${*}'
echo foo3 = "$foo3"
echo bar3 = "$bar3"

case $* in
*\:*)	echo ok 1;;
*)	echo bad 1;;
esac

case $@ in
*\:*)	echo bad 2;;
*)	echo ok 2;;
esac

case "$*" in
*\:*)	echo ok 3;;
*)	echo bad 3;;
esac

case "$@" in
*\:*)	echo bad 4;;
*)	echo ok 4;;
esac

IFS=$' \t\n'

bar=${*}
foo=$*
echo foo = "$foo"
echo bar = "$bar"

foo1=$@
bar1=${@}

echo foo1 = "$foo1"
echo bar1 = "$bar1"

foo2="$*"
bar2="${*}"

echo foo2 = "$foo2"
echo bar2 = "$bar2"

eval foo3='$*' bar3='${*}'
echo foo3 = "$foo3"
echo bar3 = "$bar3"

case $* in
*\ *)	echo ok 1;;
*)	echo bad 1;;
esac

case $@ in
*\ *)	echo ok 2;;
*)	echo bad 2;;
esac

case "$*" in
*\ *)	echo ok 3;;
*)	echo bad 3;;
esac

case "$@" in
*\ *)	echo ok 4;;
*)	echo bad 4;;
esac

# tests for the effect of quoting $* and $@ in an assignment context (plus
# arrays) -- bugs through bash 4.2
${THIS_SH} ./dollar-at-star1.sub

# more tests for expanding $@ and $* in a context where there is no word
# splitting
${THIS_SH} ./dollar-at-star2.sub
${THIS_SH} ./dollar-at-star3.sub
${THIS_SH} ./dollar-at-star4.sub
${THIS_SH} ./dollar-at-star5.sub
${THIS_SH} ./dollar-at-star6.sub
${THIS_SH} ./dollar-at-star7.sub

# tests for expansions of $@ and ${a[@]} (vs. $* and ${a[*]}) on the RHS of
# assignment statements with non-default IFS: $@ expands to args or array
# members separated by spaces
${THIS_SH} ./dollar-at-star8.sub

# more tests of the expansions of $@ and $* (and their array equivalents)
# with different values for IFS
${THIS_SH} ./dollar-at-star9.sub

# tests for expansions of "$*" and "$@" and their array equivalents when $1 == ''
# and we're using the POSIX word expansions
${THIS_SH} ./dollar-at-star10.sub
${THIS_SH} ./dollar-at-star11.sub

# tests for special expansion of "$*" and "${array[*]}" when used with other
# expansions -- bugs through bash-2.05b
${THIS_SH} ./dollar-star1.sub

# tests for expansion of "$@" on rhs of things like ${param:+word}.  Bugs
# though bash-2.05b
${THIS_SH} ./dollar-at1.sub

# tests for expansion of other variables in double-quoted strings containing
# $@.  Bugs through bash-2.05b
${THIS_SH} ./dollar-at2.sub

# tests for various expansions of $* in different contexts -- word split,
# no splitting, etc. when $IFS is NUL
${THIS_SH} ./dollar-star2.sub

# tests for expansions of "${array[*]}" and "${array[@]}" when $IFS is not the
# default and the array contains null elements
${THIS_SH} ./dollar-star3.sub

# test for set -u and expansions of $@ when there are no positional parameters
${THIS_SH} ./dollar-at3.sub
# test for set -u and expansions of $* when there are no positional parameters
${THIS_SH} ./dollar-star4.sub

# tests for expansions of $* when IFS is null
${THIS_SH} ./dollar-star5.sub

# tests for inappropriate word splitting through bash-4.2
${THIS_SH} ./dollar-at4.sub

# tests for problems with "$@" preceded and followed by other quoted expansions
# through bash-4.2
${THIS_SH} ./dollar-at5.sub

# tests for problems with "${@:1}" and other expansions with null entries
# in positional parameters
${THIS_SH} ./dollar-at6.sub

# tests for expansions of $* when $1 == ""; problem through bash-4.2
${THIS_SH} ./dollar-star6.sub

# tests for expansions of $* (unquoted) when IFS changes (e.g., ${IFS:=-})
# problem through bash-4.2
${THIS_SH} ./dollar-star7.sub

# tests for expansions of $* (unquoted) when IFS is null and word splitting is
# not going to be performed.
# problem through bash-4.4 in some parameter expansion contexts
${THIS_SH} ./dollar-star8.sub

# tests for expansions of "$@" when there are no positional parameter or when
# $1 == '' and the expansion is preceded by something that results in a quoted
# null string
${THIS_SH} ./dollar-at7.sub

# tests for expansions of $* when in an assignment context (no splitting) and
# IFS is null
${THIS_SH} ./dollar-star9.sub

# more tests for expansions of $* when not splitting with IFS set or unset and
# null strings as the positional parameters
${THIS_SH} ./dollar-star10.sub

exit 0