http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49045
--- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> 2011-05-18
18:24:31 UTC ---
Or, rather:
template<typename _Tp>
void
swap(_Tp&, _Tp&);
template<class T> void __swap_dummy(T&& a,T&& b)
noexcept(noexcept(swap(a,b)));
template<typename _Tp, __SIZE_TYPE__ _Nm>
void
swap(_Tp (&__a)[_Nm], _Tp (&__b)[_Nm])
noexcept(noexcept(__swap_dummy(*__a, *__b)));
template<typename _Tp, __SIZE_TYPE__ _Nm>
void
swap(_Tp (&__a)[_Nm], _Tp (&__b)[_Nm])
noexcept(noexcept(__swap_dummy(*__a, *__b)))
{ swap(*__a,*__b); }
-----
__swap_dummy doesn't actually need a body, but it does need a
noexcept-specifier.
