hello,everyone!
I read bash_completion, and is confused for below code:
1348 # try to allow variable completion
1349 if [[ "$cur" == ?(\\)\$* ]]; then
1350 COMPREPLY=( $( compgen -v -P '$' -- "${cur#?(\\)$}" ) )
1351 return 0
1352 fi
I don't know what's the exact meaning of "?(\\)\$*"
so I try the test below:
$ echo ?(\\)\$*
bash: syntax error near unexpected token `('
$ source /etc/bash_completion
$ echo ?(\\)\$*
?(\)$*
can you kindly tell me what's the difference from before "source
/etc/bash_completion" to after "source /etc/bash_completion" for "?(\\)\$*"?
Thank you for your kindly reply!
best regards!
2010-08-24
zhengkarl
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