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_abstract 13 14 #include <type_traits> 15 16 template <class T> test_is_abstract()17void test_is_abstract() 18 { 19 static_assert( std::is_abstract<T>::value, ""); 20 static_assert( std::is_abstract<const T>::value, ""); 21 static_assert( std::is_abstract<volatile T>::value, ""); 22 static_assert( std::is_abstract<const volatile T>::value, ""); 23 } 24 25 template <class T> test_is_not_abstract()26void test_is_not_abstract() 27 { 28 static_assert(!std::is_abstract<T>::value, ""); 29 static_assert(!std::is_abstract<const T>::value, ""); 30 static_assert(!std::is_abstract<volatile T>::value, ""); 31 static_assert(!std::is_abstract<const volatile T>::value, ""); 32 } 33 34 class Empty 35 { 36 }; 37 38 class NotEmpty 39 { 40 virtual ~NotEmpty(); 41 }; 42 43 union Union {}; 44 45 struct bit_zero 46 { 47 int : 0; 48 }; 49 50 class Abstract 51 { 52 virtual ~Abstract() = 0; 53 }; 54 main()55int main() 56 { 57 test_is_not_abstract<void>(); 58 test_is_not_abstract<int&>(); 59 test_is_not_abstract<int>(); 60 test_is_not_abstract<double>(); 61 test_is_not_abstract<int*>(); 62 test_is_not_abstract<const int*>(); 63 test_is_not_abstract<char[3]>(); 64 test_is_not_abstract<char[]>(); 65 test_is_not_abstract<Union>(); 66 test_is_not_abstract<Empty>(); 67 test_is_not_abstract<bit_zero>(); 68 test_is_not_abstract<NotEmpty>(); 69 70 test_is_abstract<Abstract>(); 71 } 72