Re: Usage of Shivers' SRE regular expression notation

[Andreas Bernauer <andreas.bernauer@gmx.de>]

On Tue, Feb 18, 2003 at 04:21:25PM +0900, Alex Shinn wrote:
>     Anton> (rx (w/nocase (: (or "href" "file") (* whitespace) "=" (*
>     Anton> whitespace) "\"" (submatch (* (~ ("?\"")))) "\"")))
> 
> For comparison, the Perl 5 equivalent is
> 
>   /(href|file)\s*=\s*"([^"]*)"/i
> 
> the equivalent (overly-) commented, structured version is
> 
>   my $KEYWORDS = "( href | file )";
>   my $OPTWHITE = "\s*";             # zero or more whitespace chars
> 
>   /
>     $KEYWORDS   # match either an href or file
>     $OPTWHITE   # optional whitespace
>     =
>     $OPTWHITE
>     "
>     (           # start group
>       [^"]      # a non-quote character
>       *         # ... repeated zero or more times
>     )           # end group
>     "
>   /xi
> 

What about sub-matches [\(...\)] in the interpolated strings and the
"basic" string? Which one can I access?


-- 
Andreas.