get prematched text?

get prematched text?

[Vektor]

some functions, such as "replace-match", use \N to present the Nth
matched text in last regexp match.
now i want to get the Nth prematched string directly, how to?

thanks in advance.

Re: get prematched text?

[Pascal Bourguignon]

Vektor <vektor@126.com> writes:

> some functions, such as "replace-match", use \N to present the Nth
> matched text in last regexp match.
> now i want to get the Nth prematched string directly, how to?
> 
> thanks in advance.

match-string

-- 
__Pascal Bourguignon__                     http://www.informatimago.com/

Our enemies are innovative and resourceful, and so are we. They never
stop thinking about new ways to harm our country and our people, and
neither do we.

Re: get prematched text?

[Alan Mackenzie]

Vektor <vektor@126.com> wrote on Sat, 07 Aug 2004 21:27:56 +0800:
> some functions, such as "replace-match", use \N to present the Nth
> matched text in last regexp match.
> now i want to get the Nth prematched string directly, how to?

It's in the Elisp manual, on the page "The Match Data" and its sub-pages.
I think the function you want is "(match-string 2)" to get the second
substring.  

> thanks in advance.

-- 
Alan Mackenzie (Munich, Germany)
Email: aacm@muuc.dee; to decode, wherever there is a repeated letter
(like "aa"), remove half of them (leaving, say, "a").