50 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_const12 13#include <type_traits>14#include "test_macros.h"15 16template <class T>17void 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 > 1424 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#endif29}30 31struct A; // incomplete32 33int 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