mirror of https://github.com/n-hys/bash.git
117 lines
2.5 KiB
Plaintext
117 lines
2.5 KiB
Plaintext
# 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
|