Ignore substring in regex match

Question

I'm writing a function list parser for Notepad++ to add support for Nasal.

I'm using the following regular expression:

^[\t ]*(var[\n\s]+)?([_A-Za-z]?[\w_]*)[\n\s]*=[\n\s]*func[\n\s]*(\([^\)\(]*\))?: Debuggex Demo

... to match these 2 types of valid declarations:

foo = func...
var foo = func...

To further extract the function name foo from the matches of this regex, the best I could come up with was:

(var[\n\s]+)?([_A-Za-z]?[\w_]*): Debuggex Demo

Using this matches "foo" or "var foo", as the case may be. What is a regex that can ignore the presence of the substring var[\n\s]+], so it only extracts "foo" for the function list?

Thanks a lot.

Casimir et Hippolyte · Accepted Answer · 2014-07-13 12:03:01Z

3

You can use the \K feature that removes all on the left from the match result:

(?:var\s+)?\K([A-Za-z_]\w*)\s*=\s*([A-Za-z_]\w*)

(Note that this feature is only available in recent versions of np++)

edited Jul 13, 2014 at 12:03

answered Jul 13, 2014 at 11:50

Casimir et Hippolyte

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Braj · Accepted Answer · 2014-07-13 11:53:16Z

0

Get the matched group from index 2.

(\bvar\b)?\s\s*(\w+)\s\s*=\s\s*func\b

Online demo

answered Jul 13, 2014 at 11:53

Braj

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