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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/>.
#
# test behavior of readonly namerefs and namerefs referencing readonly variables
# readonly nameref variable referencing read-write global variable
bar=one
declare -rn foo0=bar
unset foo0 # unsets bar
declare -p bar
unset -n foo0 # cannot unset
declare -p foo0
declare +r foo0 # modifies bar
declare -p foo0 bar
declare +r -n foo0 # error
declare +n foo0 # error
unset bar
# readonly nameref variable without a value
typeset -n foo1
typeset -r foo1
typeset -p foo1
typeset foo1=bar # error
typeset +r foo1 # no-op, follows nameref chain to nothing
typeset -p foo1
# nameref pointing to read-only global variable
foo2=bar
typeset -n foo2
typeset -r foo2 # changes bar
typeset -p foo2 bar
foo2=bar # error?
typeset +r foo2 # attempts to change bar, error
typeset -p foo2 bar # nameref unchanged
# read-only nameref pointing to read-only global variable
bar3=three
declare -rn foo3=bar3
unset foo3 # unsets bar3
bar3=three
declare -p bar3
unset -n foo3 # cannot unset
readonly bar3
declare +r foo3 # error attempting to reference bar3
declare -p foo3 bar3
declare +r -n foo3 # error
# readonly nameref pointing to read-write local -- can we remove nameref attr?
func()
{
typeset bar4=four
# readonly nameref
typeset -n -r foo4=bar4
typeset -p foo4 bar4
typeset +n foo4
typeset -p foo4
}
func
unset -f func
# readonly nameref pointing to read-write global -- can we remove nameref attr?
bar4=four
foo4=bar4
# readonly nameref
typeset -n foo4
typeset -r -n foo4
typeset -p foo4 bar4
typeset +n foo4
typeset -p foo4
bar4=four
: ${foo4=bar4}
typeset -p foo4 bar4
# readonly local nameref without a value -- can we remove nameref attribute?
func()
{
declare -r -n foo5
declare -p foo5
declare +n foo5
declare -p foo5
}
func
unset -f func
# readonly global nameref without a value -- can we remove nameref attribute?
declare -n foo5
declare -r -n foo5
declare -p foo5
declare +n foo5
declare -p foo5
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