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// PR c++/44967
// { dg-options -std=c++0x }
template <typename T> T&& declval();
template<typename T1, typename T2, typename... Args>
struct has_construct
{
typedef char one;
typedef struct {char _m[2]; } two;
template<typename U1, typename U2, typename... Args2>
static decltype(declval<U1>().construct(declval<U2*>(), declval<Args2>()...), one()) test(int);
template<typename, typename, typename...>
static two test(...);
static const bool value = sizeof(test<T1, T2, Args...>(0)) == 1;
};
struct A0
{};
struct A1
{
void construct(int*, int);
};
template<typename _Tp>
struct A2
{
template<typename _Tp1, typename... _Args>
void construct(_Tp1*, _Args&&...) {}
};
#define SA(X) static_assert(X,#X)
SA((!has_construct<A0, int, int>::value)); // ok
SA((has_construct<A1, int, int>::value)); // bang
SA((has_construct<A2<int>, int>::value)); // bang
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