Re: gitk: Turn short SHA1 names into links too

[Brad King <brad.king@kitware.com>]

Mikael Magnusson wrote:
> 2008/9/26 Wincent Colaiuta <win@wincent.com>:
>> It's a shame that tcl/tk regular expressions don't appear to support
>> anchoring matches against word boundaries (ie. "\b").
> 
> \y appears to achieve this;
> 
> % regexp {abc\y} 'abc'
> 1
> % regexp {abc\y} 'abcd'
> 0
> % regexp {\yabc\y} 'uabc,d'
> 0
> % regexp {\yabc\y} 'u+abc,d'
> 1
> 
> I have tcl/tk 8.5 so I cannot promise that isn't a new addition, I didn't
> look it up anywhere, but it's \y in some other implementations too, so I
> tried it.

It goes back at least as far as tcl/tk 8.2:

http://www.tcl.tk/man/tcl8.2.3/TclCmd/re_syntax.htm#M54

-Brad