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// PR c++/50391
// { dg-do compile { target c++11 } }
namespace std
{
template<typename T, T Val>
struct integral_constant
{ static constexpr T value = Val; };
template<typename T>
struct is_abstract
: integral_constant<bool, __is_abstract(T)>
{ };
template<typename T, bool = is_abstract<T>::value>
struct is_destructible
: integral_constant<bool, true>
{ };
template<typename T>
struct is_destructible<T, true>
: integral_constant<bool, false>
{ };
template<typename T>
struct is_nothrow_move_constructible
: is_destructible<T>
{ };
template<typename T>
struct decay
{ typedef T type; };
template<typename T>
struct decay<T&>
{ typedef T type; };
} // std
template<class Tp>
struct single
{
Tp elem;
constexpr single(const Tp& e)
: elem(e) { }
single(single&& s)
noexcept(std::is_nothrow_move_constructible<Tp>::value)
: elem(s.elem) { }
};
template<class Tp>
constexpr single<typename std::decay<Tp>::type>
make_single(Tp&& x)
{
return single<typename std::decay<Tp>::type>(x);
}
class Blob; // { dg-message "forward declaration" }
void
foo(Blob *b)
{
make_single(*b);
}
// { dg-excess-errors "incomplete type|not a member" }
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