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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// <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>
#include "test_macros.h"
class A
{
A(const A&);
A& operator=(const A&);
public:
A() {}
#if TEST_STD_VER >= 11
A(A&&) {}
#endif
};
struct legacy
{
legacy() {}
legacy(const legacy&);
};
int main(int, char**)
{
int i = 0;
const int ci = 0;
legacy l;
A a;
const A ca;
#if TEST_STD_VER >= 11
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), "");
static_assert((std::is_same<decltype(std::move_if_noexcept(l)), const legacy&>::value), "");
#else // C++ < 11
// In C++03 libc++ #define's decltype to be __decltype on clang and
// __typeof__ for other compilers. __typeof__ does not deduce the reference
// qualifiers and will cause this test to fail.
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), "");
static_assert((std::is_same<decltype(std::move_if_noexcept(l)), const legacy&>::value), "");
#endif
#if TEST_STD_VER > 11
constexpr int i1 = 23;
constexpr int i2 = std::move_if_noexcept(i1);
static_assert(i2 == 23, "" );
#endif
return 0;
}
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