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Re: 1.5, 1.7: Bash regex not recognizing word boundaries


On Mon, Oct 19, 2009 at 4:50 PM, Allen Halsey wrote:
These should print "Matched", but they don't:

$ REGEX='\bcat\b'
$ [[ "dog cat bird" =~ $REGEX ]] && echo "Matched"
$ REGEX='\<cat\>'
$ [[ "dog cat bird" =~ $REGEX ]] && echo "Matched"

It's worth noting that this is not limited to Cygwin; I'm seeing the
same behavior on OS X (with the same version of bash as my Linux
system where the above works as intended).   I suspect it's a factor
of the regex library used to build bash rather than bash itself.

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