mirror of https://github.com/n-hys/bash.git
118 lines
1.9 KiB
Plaintext
118 lines
1.9 KiB
Plaintext
# 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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f() { local -n a=$1; a=X; }
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a=(0); f 'a[0]'
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while [[ -v a ]]; do declare -p a; unset a; done
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a=(0); f 'a'
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while [[ -v a ]]; do declare -p a; unset a; done
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b=(0); f 'b[0]'
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while [[ -v a ]]; do typeset -p a; unset a; done
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typeset -p b
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b=(0); f 'a[0]'
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while [[ -v a ]]; do typeset -p a; unset a; done
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typeset -p b
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add_X_echo()
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{
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typeset -n ref=$1
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ref+=X
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echo inside $ref
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}
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ref=
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add_X_echo ref
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echo outside "$ref"
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unset ref
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# same test, but assigning nameref variable circular reference directly
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xxx_func()
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{
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typeset -n xxx=xxx
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xxx=foo
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declare -p xxx
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echo $FUNCNAME: inside: xxx = $xxx
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}
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xxx=7
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echo before: $xxx
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xxx_func
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echo after: $xxx
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unset xxx
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unset -f xxx_func
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typeset -n ref=ref
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typeset -n ref=re ref+=f
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typeset -p ref
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ref=4
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typeset -p ref re
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export ref
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printenv ref
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printenv re
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unset ref ; unset -n ref
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unset foo; unset -n foo
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typeset -n foo=var[@]
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typeset -p foo
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typeset -n ref=var ref+=[@]
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typeset -p ref
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ref=42
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typeset -n bar
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bar=var[@]
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typeset -p bar
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bar=7
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unset a b
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unset -n a b
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typeset -n a=b b
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b=a[1]
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typeset -p a b
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a=foo
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typeset -p a b
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unset a
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typeset -n a=b
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declare a=foo
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typeset -p a b
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unset n v
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unset -n n v
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v=(0 1)
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typeset -n n=v
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unset n[0]
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typeset -p n v
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unset -n n
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v=(0 1)
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typeset -n n=v
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unset -n n
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typeset -p n v
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v=(0 1)
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declare -n n=v[1]
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unset n
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declare -p n v
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