1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // type_traits 11 12 // is_const 13 14 #include <type_traits> 15 #include "test_macros.h" 16 17 template <class T> 18 void test_is_const() 19 { 20 static_assert(!std::is_const<T>::value, ""); 21 static_assert( std::is_const<const T>::value, ""); 22 static_assert(!std::is_const<volatile T>::value, ""); 23 static_assert( std::is_const<const volatile T>::value, ""); 24 #if TEST_STD_VER > 14 25 static_assert(!std::is_const_v<T>, ""); 26 static_assert( std::is_const_v<const T>, ""); 27 static_assert(!std::is_const_v<volatile T>, ""); 28 static_assert( std::is_const_v<const volatile T>, ""); 29 #endif 30 } 31 32 int main() 33 { 34 test_is_const<void>(); 35 test_is_const<int>(); 36 test_is_const<double>(); 37 test_is_const<int*>(); 38 test_is_const<const int*>(); 39 test_is_const<char[3]>(); 40 test_is_const<char[]>(); 41 42 static_assert(!std::is_const<int&>::value, ""); 43 static_assert(!std::is_const<const int&>::value, ""); 44 } 45
