https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71010
--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Ubikovich from comment #3) > But since C++14 cbegin invoke std::begin: > > // http://en.cppreference.com/w/cpp/iterator/begin > template< class C > > constexpr auto cbegin( const C& c ) -> decltype(std::begin(c)); > (3) (since C++14) > > Then in what namespace should be user-defined begin/end? I already explained how to do it correctly, please read comment 1 again. (In reply to Andrew Pinski from comment #4) > In the same as the class so ADR (argument dependent resolution) can find it. N.B. that should be ADL (argument dependent *lookup*).
