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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <utility>
// template <class T>
// typename conditional
// <
// !is_nothrow_move_constructible<T>::value && is_copy_constructible<T>::value,
// const T&,
// T&&
// >::type
// move_if_noexcept(T& x);
#include <utility>
class A
{
A(const A&);
A& operator=(const A&);
public:
A() {}
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
A(A&&) {}
#endif
};
struct legacy
{
legacy() {}
legacy(const legacy&);
};
int main()
{
int i = 0;
const int ci = 0;
legacy l;
A a;
const A ca;
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
static_assert((std::is_same<decltype(std::move_if_noexcept(i)), int&&>::value), "");
static_assert((std::is_same<decltype(std::move_if_noexcept(ci)), const int&&>::value), "");
static_assert((std::is_same<decltype(std::move_if_noexcept(a)), A&&>::value), "");
static_assert((std::is_same<decltype(std::move_if_noexcept(ca)), const A&&>::value), "");
#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES
static_assert((std::is_same<decltype(std::move_if_noexcept(i)), const int>::value), "");
static_assert((std::is_same<decltype(std::move_if_noexcept(ci)), const int>::value), "");
static_assert((std::is_same<decltype(std::move_if_noexcept(a)), const A>::value), "");
static_assert((std::is_same<decltype(std::move_if_noexcept(ca)), const A>::value), "");
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
static_assert((std::is_same<decltype(std::move_if_noexcept(l)), const legacy&>::value), "");
#if _LIBCPP_STD_VER > 11
constexpr int i1 = 23;
constexpr int i2 = std::move_if_noexcept(i1);
static_assert(i2 == 23, "" );
#endif
}
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