https://docs.perl6.org/type/Str#(Cool)_method_IO https://docs.perl6.org/type/Str#(Cool)_method_IO leads you to: https://docs.perl6.org/type/IO$COLON$COLONPath h

https://docs.perl6.org/type/Str#(Cool)_method_IO https://docs.perl6.org/type/Str#(Cool)_method_IO leads you to: https://docs.perl6.org/type/IO$COLON$COLONPath https://docs.perl6.org/type/IO$COLON$COLONPath leads you to: https://docs.perl6.org/type/IO$COLON$COLONPath#(Cool)_method_words https://docs.perl6.org/type/IO$COLON$COLONPath#(Cool)_method... It's a bit of a trap, I agree and we should fix it. Having all exceptions listed is on the list and will add another few hundred man hours to the nearly 5000 we invested in the docs so far. If you really want to be verbose you can always write `open('foo.txt', :r).Str.split(/\W/)`. If you learn a new language there will be buildins that are well tested and may be more efficient then your solution (it isn't right now for your example. Rakudo does it exactly your way). It can be worth your time to learn what the standard library provides you with -- in any language that is.