| //===----------------------------------------------------------------------===// |
| // |
| // 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_void |
| |
| #include <type_traits> |
| #include <cstddef> // for std::nullptr_t |
| #include "test_macros.h" |
| |
| template <class T> |
| void test_is_void() |
| { |
| static_assert( std::is_void<T>::value, ""); |
| static_assert( std::is_void<const T>::value, ""); |
| static_assert( std::is_void<volatile T>::value, ""); |
| static_assert( std::is_void<const volatile T>::value, ""); |
| #if TEST_STD_VER > 14 |
| static_assert( std::is_void_v<T>, ""); |
| static_assert( std::is_void_v<const T>, ""); |
| static_assert( std::is_void_v<volatile T>, ""); |
| static_assert( std::is_void_v<const volatile T>, ""); |
| #endif |
| } |
| |
| template <class T> |
| void test_is_not_void() |
| { |
| static_assert(!std::is_void<T>::value, ""); |
| static_assert(!std::is_void<const T>::value, ""); |
| static_assert(!std::is_void<volatile T>::value, ""); |
| static_assert(!std::is_void<const volatile T>::value, ""); |
| #if TEST_STD_VER > 14 |
| static_assert(!std::is_void_v<T>, ""); |
| static_assert(!std::is_void_v<const T>, ""); |
| static_assert(!std::is_void_v<volatile T>, ""); |
| static_assert(!std::is_void_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_void<void>(); |
| |
| test_is_not_void<int>(); |
| test_is_not_void<int*>(); |
| test_is_not_void<int&>(); |
| test_is_not_void<int&&>(); |
| test_is_not_void<double>(); |
| test_is_not_void<const int*>(); |
| test_is_not_void<char[3]>(); |
| test_is_not_void<char[]>(); |
| test_is_not_void<Union>(); |
| test_is_not_void<Empty>(); |
| test_is_not_void<bit_zero>(); |
| test_is_not_void<NotEmpty>(); |
| test_is_not_void<Abstract>(); |
| test_is_not_void<Enum>(); |
| test_is_not_void<FunctionPtr>(); |
| test_is_not_void<incomplete_type>(); |
| |
| return 0; |
| } |