Modifies operator<< to return void. This will make uses of operator<<
fail for intersections, but given that the fix is very easy this should
be fine. The benefit is that is_printable now returns false for
intersections which fixes the deprecation warnings that occurred in
basically every test.

René Fritze authored 4 years ago and René Fritze committed 4 years ago

this actually works with just function overloads

René Fritze authored 4 years ago and René Fritze committed 4 years ago

hiding functions for "wrong" args only makes sense
if there are alternatives