Regex recursion captured string

Question

I have a problem with a regex that has to capture a substring that it's already captured...

I have this regex:

(?<domain>\w+\.\w+)($|\/|\.)

And I want to capture every subdomain recursively. For example, in this string:

test1.test2.abc.def

This expression captures test1.test2 and abc.def but I need to capture: test1.test2 test2.abc abc.def

Do you know if there is any option to do this recursively?

Thanks!

Answer 1

Maybe the following:

(\.|^)(?=(\w+\.\w+))

Go with capturing group 2