mirror of
https://https.git.savannah.gnu.org/git/bash.git
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Chet Ramey
96 lines
2.2 KiB
Plaintext
96 lines
2.2 KiB
Plaintext
# Copyright 2025 The Free Software Foundation
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#
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# 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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# let's see how various arithmetic contexts handle embedded double quotes and
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# empty expressions
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declare -a a
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afunc()
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{
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a[0]=0
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( a[" "]=10 ; declare -p a )
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( (( a[" "]=11 )) ; declare -p a )
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( : $(( a[" "]=12 )) ; declare -p a )
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( let a\[" "\]=13 ; declare -p a )
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( declare "a[\" \"]=14" ; declare -p a )
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( a[\" \"]=15; declare -p a )
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( (( a[\" \"]=16 )) ; declare -p a )
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( : $(( a[\" \"]=17 )) ; declare -p a )
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( let "a[\" \"]"=18 ; declare -p a )
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( a[\"\"]=19 ; declare -p a )
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( (( a[\"\"]=20 )) ; declare -p a )
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( : $(( a[\"\"]=21 )) ; declare -p a )
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( let "a[\"\"]"=22 ; declare -p a )
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( a[""]=23 ; declare -p a )
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( (( a[""]=24 )); declare -p a )
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( : $(( a[""]=25 )); declare -p a )
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( let 'a[""]=26' ; declare -p a )
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}
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echo == arraysub ==
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shopt -u assoc_expand_once
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echo === assoc_expand_once unset ===
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afunc
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unset a
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declare -a a
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shopt -s assoc_expand_once
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echo === assoc_expand_once set ===
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afunc
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unset a
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echo == substring ==
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a=12345
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echo ${a:0:2}
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echo ${a::2}
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echo ${a:2:0}
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echo ${a:2:}
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echo ${a:2}
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echo == cond ==
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[[ "" -gt 1 ]] ; echo $?
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[[ 1 -le "" ]] ; echo $?
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[[ 0 -eq "" ]] ; echo $?
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echo == arithsub ==
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echo $(( )) ; echo 1 $?
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echo $(( "" )) ; echo 2 $?
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echo $(( \"\" )) ; echo 3 $?
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echo $(()) ; echo 4 $?
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a=$(( )) ; echo 5 $?
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a=$(( "" )) ; echo 6 $?
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echo == arithcmd ==
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(( )) ; echo 1 $?
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(( "" )) ; echo 2 $?
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(( " " )) ; echo 3 $?
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(( 1 - "" )) ; echo 4 $?
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echo == letbltin ==
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let '' ; echo 1 $?
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let ' ' ; echo 2 $?
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let '0 - ""' ; echo 3 $?
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let "0 - \"\"" ; echo 4 $?
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