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Re: Inconsistence when checking if a pattern is quoted or not for `==' a


From: Clark J. Wang
Subject: Re: Inconsistence when checking if a pattern is quoted or not for `==' and `=~' in [[ ]]
Date: Thu, 17 Feb 2011 22:35:31 +0800

On Thu, Feb 17, 2011 at 9:20 PM, Andreas Schwab <address@hidden>wrote:

> "Clark J. Wang" <address@hidden> writes:
>
> > See following script output:
> >
> > bash-4.2# cat quoted-pattern.sh
> > [[ .a == \.a* ]] && echo 1  # not quoted
> > [[ aa =~ \.a* ]] && echo 2  # quoted
> >
> > [[ aa =~ \a.  ]] && echo 3  # not quoted
> > [[ aa =~ \a\. ]] && echo 4  # quoted
> > bash-4.2# bash42 quoted-pattern.sh
> > 1
> > 3
> > bash-4.2#
> >
> > From my understanding 1 2 3 4 should all be printed out.
>
> "aa" contains no period, so why should it be matched?
>
>
If it should not be matched why I got 3 printed out?


> Andreas.
>
> --
> Andreas Schwab, address@hidden
> GPG Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
> "And now for something completely different."
>



-- 
Clark


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