/(?=.*(?<one>foo))(?=.*(?<two>bar))(?=.*(?<three>baz))/

Following the pattern from this article, I’m trying to create a regular expression that would capture some groups in arbitrary order. However, the additional requirement is that the groups must be optional, i.e. it must match all the strings below:

foo bar baz
foo baz bar
baz bar foo
foo bar
foo baz
bar baz
foo
bar
baz

I tried applying a quantifier ? to the capturing group but for some reason it stops capturing that group completely. I’m wondering if that’s possible at all?

/(?=.*(?<one>foo)?)(?=.*(?<two>bar)?)(?=.*(?<three>baz)?)/

Here’s the demo.

Would appreciate any advice.