42 lines · cpp
1// RUN: %clang_cc1 -fsyntax-only -std=c++11 %s2 3template <class T>4T&&5declval() noexcept;6 7template <class T>8struct some_trait9{10 static const bool value = false;11};12 13template <class T>14void swap(T& x, T& y) noexcept(some_trait<T>::value)15{16 T tmp(static_cast<T&&>(x));17 x = static_cast<T&&>(y);18 y = static_cast<T&&>(tmp);19}20 21template <class T, unsigned N>22struct array23{24 T data[N];25 26 void swap(array& a) noexcept(noexcept(::swap(declval<T&>(), declval<T&>())));27};28 29struct DefaultOnly30{31 DefaultOnly() = default;32 DefaultOnly(const DefaultOnly&) = delete;33 DefaultOnly& operator=(const DefaultOnly&) = delete;34 ~DefaultOnly() = default;35};36 37int main()38{39 array<DefaultOnly, 1> a, b;40}41 42