97 lines · cpp
1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9// type_traits10 11// is_lvalue_reference12 13#include <type_traits>14#include <cstddef> // for std::nullptr_t15#include "test_macros.h"16 17template <class T>18void test_is_lvalue_reference()19{20 static_assert( std::is_lvalue_reference<T>::value, "");21 static_assert( std::is_lvalue_reference<const T>::value, "");22 static_assert( std::is_lvalue_reference<volatile T>::value, "");23 static_assert( std::is_lvalue_reference<const volatile T>::value, "");24#if TEST_STD_VER > 1425 static_assert( std::is_lvalue_reference_v<T>, "");26 static_assert( std::is_lvalue_reference_v<const T>, "");27 static_assert( std::is_lvalue_reference_v<volatile T>, "");28 static_assert( std::is_lvalue_reference_v<const volatile T>, "");29#endif30}31 32template <class T>33void test_is_not_lvalue_reference()34{35 static_assert(!std::is_lvalue_reference<T>::value, "");36 static_assert(!std::is_lvalue_reference<const T>::value, "");37 static_assert(!std::is_lvalue_reference<volatile T>::value, "");38 static_assert(!std::is_lvalue_reference<const volatile T>::value, "");39#if TEST_STD_VER > 1440 static_assert(!std::is_lvalue_reference_v<T>, "");41 static_assert(!std::is_lvalue_reference_v<const T>, "");42 static_assert(!std::is_lvalue_reference_v<volatile T>, "");43 static_assert(!std::is_lvalue_reference_v<const volatile T>, "");44#endif45}46 47class Empty48{49};50 51class NotEmpty52{53 virtual ~NotEmpty();54};55 56union Union {};57 58struct bit_zero59{60 int : 0;61};62 63class Abstract64{65 virtual ~Abstract() = 0;66};67 68enum Enum {zero, one};69struct incomplete_type;70 71typedef void (*FunctionPtr)();72 73int main(int, char**)74{75 test_is_lvalue_reference<int&>();76 77 test_is_not_lvalue_reference<std::nullptr_t>();78 test_is_not_lvalue_reference<void>();79 test_is_not_lvalue_reference<int>();80 test_is_not_lvalue_reference<int*>();81 test_is_not_lvalue_reference<int&&>();82 test_is_not_lvalue_reference<double>();83 test_is_not_lvalue_reference<const int*>();84 test_is_not_lvalue_reference<char[3]>();85 test_is_not_lvalue_reference<char[]>();86 test_is_not_lvalue_reference<Union>();87 test_is_not_lvalue_reference<Enum>();88 test_is_not_lvalue_reference<FunctionPtr>();89 test_is_not_lvalue_reference<Empty>();90 test_is_not_lvalue_reference<bit_zero>();91 test_is_not_lvalue_reference<NotEmpty>();92 test_is_not_lvalue_reference<Abstract>();93 test_is_not_lvalue_reference<incomplete_type>();94 95 return 0;96}97