Re: elisp optimization question

[Kevin Rodgers]

Lennart Borgman (gmail) wrote:
> Another way to make it faster would perhaps be to make one regular 
> expression with regexp-opt and then check the match.

That's a good suggestion, and it led me to look into regexp-opt for the
first time.  But how do I get it to capture just the variant part of the
matched strings in "\\( ... \\)" i.e. excluding any common prefix or
suffix?

E.g.

(regexp-opt '("»" "’")) =>
"&#\\(?:\\(?:18\\|821\\)7;\\)"

(regexp-opt '("»" "’") t) =>
"\\(&#\\(?:\\(?:18\\|821\\)7;\\)\\)"

But what I'd like it to return is "&#\\(\\(?:18\\|821\\)7;\\)"
so that (match-string 1) would return just "187" or "8217".

--
Kevin Rodgers
Denver, Colorado, USA