http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47433
--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-01-24 13:53:27 UTC --- (In reply to comment #3) > Is anything specified in the standard in this direction? 20.2.2 Swappable requirements [swappable.requirements] 3 The context in which swap(t, u) and swap(u, t) are evaluated shall ensure that a binary non-member function named “swap” is selected via overload resolution (13.3) on a candidate set that includes: — the two swap function templates defined in <utility> (20.3) and — the lookup set produced by argument-dependent lookup (3.4.2). The usual way to do that is: using std::swap; // overloads in <utility> are candidates swap(t, u); // overloads found by ADL are also candidates
