57 lines
1.4 KiB
Text
57 lines
1.4 KiB
Text
# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# post-bash-4.3 changes for more ksh93 compatibility when following nameref
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# chains and using typeset/declare -n to operate on nameref variables rather
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# than the variables they reference
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# don't follow nameref chain when using declare -n and at the global scope
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unset -n r1 r2
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typeset -n r1=r2
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typeset -n r2=x
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typeset -n r1=y
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typeset -p r1 r2 x y
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# same behavior when in a shell function
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foo()
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{
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typeset -n r1=r2
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typeset -n r2=x
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typeset -n r1=y
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typeset -p r1 r2 x y
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}
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unset -n r1 r2
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foo
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unset -f foo
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# same behavior when namerefs aren't chained
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unset -n r1 r2
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typeset -n r1=z
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typeset -n r2=x
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typeset -n r1=y
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typeset -p r1 r2 x y
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# same behavior when referenced variables have values
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unset -n r1 r2
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x=one
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y=two
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typeset -n r1=r2
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typeset -n r2=x
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typeset -n r1=y
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typeset -p r1 r2 x y
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