| 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-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | // type_traits |
| 10 | |
| 11 | // is_const |
| 12 | |
| 13 | #include <type_traits> |
| 14 | #include "test_macros.h" |
| 15 | |
| 16 | template <class T> |
| 17 | void test_is_const() |
| 18 | { |
| 19 | static_assert(!std::is_const<T>::value, "" ); |
| 20 | static_assert( std::is_const<const T>::value, "" ); |
| 21 | static_assert(!std::is_const<volatile T>::value, "" ); |
| 22 | static_assert( std::is_const<const volatile T>::value, "" ); |
| 23 | #if TEST_STD_VER > 14 |
| 24 | static_assert(!std::is_const_v<T>, "" ); |
| 25 | static_assert( std::is_const_v<const T>, "" ); |
| 26 | static_assert(!std::is_const_v<volatile T>, "" ); |
| 27 | static_assert( std::is_const_v<const volatile T>, "" ); |
| 28 | #endif |
| 29 | } |
| 30 | |
| 31 | struct A; // incomplete |
| 32 | |
| 33 | int main(int, char**) |
| 34 | { |
| 35 | test_is_const<void>(); |
| 36 | test_is_const<int>(); |
| 37 | test_is_const<double>(); |
| 38 | test_is_const<int*>(); |
| 39 | test_is_const<const int*>(); |
| 40 | test_is_const<char[3]>(); |
| 41 | test_is_const<char[]>(); |
| 42 | |
| 43 | test_is_const<A>(); |
| 44 | |
| 45 | static_assert(!std::is_const<int&>::value, "" ); |
| 46 | static_assert(!std::is_const<const int&>::value, "" ); |
| 47 | |
| 48 | return 0; |
| 49 | } |
| 50 | |