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// PR c++/49107
// { dg-do compile { target c++11 } }
template<typename _Tp>
_Tp declval() noexcept;
template<typename _Tp , typename = decltype(_Tp(declval<_Tp&&>()))>
struct trait
{
static const bool value=true;
};
template<class _T2>
struct pair
{
_T2 second;
void swap(pair& __p)
noexcept(trait<_T2>::value);
};
template < class R_ >
struct Main
{
Main() {}
Main(const typename R_::Sub1T& r) ;
Main(const typename R_::Sub2T& l) ;
};
template < class R_ >
class Sub1
{
typedef pair<typename R_::MainT> Rep;
Rep base;
};
template < class R_ >
struct Sub2
{
typedef pair<typename R_::MainT> Rep;
Rep base;
};
struct Kernel
{
typedef Main<Kernel> MainT;
typedef Sub1<Kernel> Sub1T;
typedef Sub2<Kernel> Sub2T;
};
Main<Kernel> f()
{
return Main<Kernel> ();
}
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