| //===----------------------------------------------------------------------===// |
| // |
| // 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_base_of |
| |
| #include <type_traits> |
| |
| #include "test_macros.h" |
| |
| template <class T, class U> |
| void test_is_base_of() |
| { |
| static_assert((std::is_base_of<T, U>::value), ""); |
| static_assert((std::is_base_of<const T, U>::value), ""); |
| static_assert((std::is_base_of<T, const U>::value), ""); |
| static_assert((std::is_base_of<const T, const U>::value), ""); |
| #if TEST_STD_VER > 14 |
| static_assert((std::is_base_of_v<T, U>), ""); |
| static_assert((std::is_base_of_v<const T, U>), ""); |
| static_assert((std::is_base_of_v<T, const U>), ""); |
| static_assert((std::is_base_of_v<const T, const U>), ""); |
| #endif |
| } |
| |
| template <class T, class U> |
| void test_is_not_base_of() |
| { |
| static_assert((!std::is_base_of<T, U>::value), ""); |
| } |
| |
| struct B {}; |
| struct B1 : B {}; |
| struct B2 : B {}; |
| struct D : private B1, private B2 {}; |
| union U0; |
| union U1 {}; |
| struct I0; |
| struct I1 {}; |
| |
| int main(int, char**) |
| { |
| // A union is never the base class of anything (including incomplete types) |
| test_is_not_base_of<U0, B>(); |
| test_is_not_base_of<U0, B1>(); |
| test_is_not_base_of<U0, B2>(); |
| test_is_not_base_of<U0, D>(); |
| test_is_not_base_of<U1, B>(); |
| test_is_not_base_of<U1, B1>(); |
| test_is_not_base_of<U1, B2>(); |
| test_is_not_base_of<U1, D>(); |
| test_is_not_base_of<U0, I0>(); |
| test_is_not_base_of<U1, I1>(); |
| test_is_not_base_of<U0, U1>(); |
| test_is_not_base_of<U0, int>(); |
| test_is_not_base_of<U1, int>(); |
| test_is_not_base_of<I0, int>(); |
| test_is_not_base_of<I1, int>(); |
| |
| // A union never has base classes (including incomplete types) |
| test_is_not_base_of<B, U0>(); |
| test_is_not_base_of<B1, U0>(); |
| test_is_not_base_of<B2, U0>(); |
| test_is_not_base_of<D, U0>(); |
| test_is_not_base_of<B, U1>(); |
| test_is_not_base_of<B1, U1>(); |
| test_is_not_base_of<B2, U1>(); |
| test_is_not_base_of<D, U1>(); |
| test_is_not_base_of<I0, U0>(); |
| test_is_not_base_of<I1, U1>(); |
| test_is_not_base_of<U1, U0>(); |
| test_is_not_base_of<int, U0>(); |
| test_is_not_base_of<int, U1>(); |
| test_is_not_base_of<int, I0>(); |
| test_is_not_base_of<int, I1>(); |
| |
| return 0; |
| } |