https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56785
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Eelis from comment #2) > Another manifestation of this is that > > sizeof(pair<pair<char,char>,pair<char,char>>) == 4 > > while > > sizeof(tuple<tuple<char,char>,tuple<char,char>>) == 5 (!!). Oh noes, one byte more for a silly edge case! > I think that at the moment, GCC users are best advised to avoid using stdlib > tuples if efficiency is a concern. That's a ridiculous conclusion to reach based on an edge case. There are many realistic situations where std::tuple is more compact that std::pair.
