File: sfinae22.C

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gcc-arm-none-eabi 15%3A7-2018-q2-5
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// PR c++/48745
// { dg-do compile { target c++11 } }

template<class T>
struct add_rval_ref {
  typedef T&& type;
};

template<>
struct add_rval_ref<void> {
  typedef void type;
};

template<class T>
typename add_rval_ref<T>::type create();

template<class T, class... Args>
decltype(T{create<Args>()...}, char()) f(int);

template<class, class...>
char (&f(...))[2];

static_assert(sizeof(f<int, void>(0)) != 1, "Error"); // #