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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
//
//===----------------------------------------------------------------------===//
// type_traits
// is_lvalue_reference
// UNSUPPORTED: c++98, c++03
#include <type_traits>
#include <cstddef> // for std::nullptr_t
#include "test_macros.h"
template <class T>
void test_is_lvalue_reference()
{
static_assert( std::is_lvalue_reference<T>::value, "");
static_assert( std::is_lvalue_reference<const T>::value, "");
static_assert( std::is_lvalue_reference<volatile T>::value, "");
static_assert( std::is_lvalue_reference<const volatile T>::value, "");
#if TEST_STD_VER > 14
static_assert( std::is_lvalue_reference_v<T>, "");
static_assert( std::is_lvalue_reference_v<const T>, "");
static_assert( std::is_lvalue_reference_v<volatile T>, "");
static_assert( std::is_lvalue_reference_v<const volatile T>, "");
#endif
}
template <class T>
void test_is_not_lvalue_reference()
{
static_assert(!std::is_lvalue_reference<T>::value, "");
static_assert(!std::is_lvalue_reference<const T>::value, "");
static_assert(!std::is_lvalue_reference<volatile T>::value, "");
static_assert(!std::is_lvalue_reference<const volatile T>::value, "");
#if TEST_STD_VER > 14
static_assert(!std::is_lvalue_reference_v<T>, "");
static_assert(!std::is_lvalue_reference_v<const T>, "");
static_assert(!std::is_lvalue_reference_v<volatile T>, "");
static_assert(!std::is_lvalue_reference_v<const volatile T>, "");
#endif
}
class Empty
{
};
class NotEmpty
{
virtual ~NotEmpty();
};
union Union {};
struct bit_zero
{
int : 0;
};
class Abstract
{
virtual ~Abstract() = 0;
};
enum Enum {zero, one};
struct incomplete_type;
typedef void (*FunctionPtr)();
int main(int, char**)
{
test_is_lvalue_reference<int&>();
test_is_not_lvalue_reference<std::nullptr_t>();
test_is_not_lvalue_reference<void>();
test_is_not_lvalue_reference<int>();
test_is_not_lvalue_reference<int*>();
test_is_not_lvalue_reference<int&&>();
test_is_not_lvalue_reference<double>();
test_is_not_lvalue_reference<const int*>();
test_is_not_lvalue_reference<char[3]>();
test_is_not_lvalue_reference<char[]>();
test_is_not_lvalue_reference<Union>();
test_is_not_lvalue_reference<Enum>();
test_is_not_lvalue_reference<FunctionPtr>();
test_is_not_lvalue_reference<Empty>();
test_is_not_lvalue_reference<bit_zero>();
test_is_not_lvalue_reference<NotEmpty>();
test_is_not_lvalue_reference<Abstract>();
test_is_not_lvalue_reference<incomplete_type>();
return 0;
}
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