Re: regexp problem

[Pascal Bourguignon <pjb@informatimago.com>]

"Þorne" <ego111@gmail.com> writes:

> Pascal Bourguignon wrote:
>> You can match groups:
>>
>> a\(b\)c
>>
>> so the match number 0 is the whole regexp: abc
>> but the match number 1 is only b
>
> Sorry to be dense, but do you mean something like this:
>
> (search-forward-regexp "a\\(b\\)c\\0")


(when (search-forward-regexp "a\\(b\\)c")
  (let ((all    (match-string 0))
        (only-b (match-string 1)))
    (goto-char (match-end 0))
    (insert (format "\nall = %s\nonly-b = %s\n" all only-b))))



> because i can't get anything like it to work.  I don't really follow
> the documentation for the \<digit> construct in regexps at all...
>
> In fact the code above finds a string that looks like `abc0' instead of
> just `b'.
>
> Specifically i am trying to make a regexp for define-generic-mode to
> colorize the string`*' but only if it is in a string that looks like
> `(*)'.  But not colorize the surrounding parens.

Read with utmost attention the help about the variable font-lock-keywords.

 (MATCHER . SUBEXP)

 ("fu\\(bar\\)" . 1)	substring "bar" within all occurrences of "fubar" in
                       	the value of `font-lock-keyword-face'.


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

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