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Chet Ramey
43 lines
1.5 KiB
Plaintext
43 lines
1.5 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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# issues with taking the length of nameref variables
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#
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# just the basics
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scalar=foo
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declare -a array=(foo)
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declare -n name=array
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declare -n name1=array[0]
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declare -n name2=unset
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declare -n name3=
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declare -n name4='a&b'
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echo ${#name} # length of nameref resolving to set variable
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echo ${#name1} # length of nameref resolving to valid non-identifier
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echo ${#name2} # length of nameref resolving to unset variable
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echo ${#name3} # length of nameref resolving to empty string
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echo ${#name4} # length of nameref resolving to invalid non-identifier
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unset -n name name1
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declare -n name=scalar
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declare -n name1=scalar[0]
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name4='aa&bb'
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declare -n name4
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echo ${#name} # length of nameref resolving to set variable
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echo ${#name1} # length of nameref resolving to valid non-identifier
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echo ${#name4} # length of nameref resolving to invalid non-identifier
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