need some regular expression help

[Theerasak Photha]

On 8 Oct 2006 01:49:50 -0700, Diez B. Roggisch <deets at web.de> wrote:

> Even if it has - I'm not sure if it really does you good, for several
> reasons:
>
>  - regexes - even enhanced ones - don't build trees. But that is what
> you ultimately want
>    from an expression like sin(log(x))
>
>  - even if they are more powerful these days, the theory of context
> free grammars still applies.
>    so if what you need isn't LL(k) but LR(k), how do you specify that
> to the regex engine?
>
>  - the regexes are useful because of their compact notations, parsers
> allow for better structured outcome

Just wait for Perl 6 :D

-- Theerasak