clang/test/SemaCXX/dependent-noexcept-unevaluated.cpp

   1 // RUN: %clang_cc1 -fsyntax-only -std=c++11 %s
   2
   3 template <class T>
   4 T&&
   5 declval() noexcept;
   6
   7 template <class T>
   8 struct some_trait
   9 {
  10     static const bool value = false;
  11 };
  12
  13 template <class T>
  14 void 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
  21 template <class T, unsigned N>
  22 struct array
  23 {
  24     T data[N];
  25
  26   void swap(array& a) noexcept(noexcept(::swap(declval<T&>(), declval<T&>())));
  27 };
  28
  29 struct DefaultOnly
  30 {
  31     DefaultOnly() = default;
  32     DefaultOnly(const DefaultOnly&) = delete;
  33     DefaultOnly& operator=(const DefaultOnly&) = delete;
  34     ~DefaultOnly() = default;
  35 };
  36
  37 int main()
  38 {
  39     array<DefaultOnly, 1> a, b;
  40 }
  41