regexp question

[Jochen Voss]

Dear all,

What happens if a group in a regular expression matches repeatedly, via the * operator?  Experimentally I found that FindStringSubmatch then returns the text of the last match.  Is this guaranteed somewhere (I didn't find anything about this on https://pkg.go.dev/regexp )?  Also, is there an easy way to get the other matched strings?

Example: https://go.dev/play/p/h5UDongaz7u

regexp: `A\s*(?:([a-z]+)\s*)*B`

applied to: "one A two three four B five"

the inner group gives me "four"

Is FindStringSubmatch guaranteed to return the "four"? 

Is there a way to also get the matched "two" and "three"?

Many thanks,

Jochen

[Peter Galbavy]

FindAllStringSubmatch() ? https://pkg.go.dev/regexp#Regexp.FindAllStringSubmatch

[Jochen Voss]

Hi Peter,

I don't think this is the solution: https://go.dev/play/p/Ti7UEGd1BVE .

I think "All" means that it can deal with several copies of the regexp, rather than returning all matches of the group.

All the best,

Jochen