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 #include "test_macros.h" 16 17 template <class T> 18 void test_is_abstract() 19 { 20 static_assert( std::is_abstract<T>::value, ""); 21 static_assert( std::is_abstract<const T>::value, ""); 22 static_assert( std::is_abstract<volatile T>::value, ""); 23 static_assert( std::is_abstract<const volatile T>::value, ""); 24 #if TEST_STD_VER > 14 25 static_assert( std::is_abstract_v<T>, ""); 26 static_assert( std::is_abstract_v<const T>, ""); 27 static_assert( std::is_abstract_v<volatile T>, ""); 28 static_assert( std::is_abstract_v<const volatile T>, ""); 29 #endif 30 } 31 32 template <class T> 33 void test_is_not_abstract() 34 { 35 static_assert(!std::is_abstract<T>::value, ""); 36 static_assert(!std::is_abstract<const T>::value, ""); 37 static_assert(!std::is_abstract<volatile T>::value, ""); 38 static_assert(!std::is_abstract<const volatile T>::value, ""); 39 #if TEST_STD_VER > 14 40 static_assert(!std::is_abstract_v<T>, ""); 41 static_assert(!std::is_abstract_v<const T>, ""); 42 static_assert(!std::is_abstract_v<volatile T>, ""); 43 static_assert(!std::is_abstract_v<const volatile T>, ""); 44 #endif 45 } 46 47 class Empty 48 { 49 }; 50 51 class NotEmpty 52 { 53 virtual ~NotEmpty(); 54 }; 55 56 union Union {}; 57 58 struct bit_zero 59 { 60 int : 0; 61 }; 62 63 class Abstract 64 { 65 virtual ~Abstract() = 0; 66 }; 67 68 template <class> 69 struct AbstractTemplate { 70 virtual void test() = 0; 71 }; 72 73 template <> 74 struct AbstractTemplate<double> {}; 75 76 int main() 77 { 78 test_is_not_abstract<void>(); 79 test_is_not_abstract<int&>(); 80 test_is_not_abstract<int>(); 81 test_is_not_abstract<double>(); 82 test_is_not_abstract<int*>(); 83 test_is_not_abstract<const int*>(); 84 test_is_not_abstract<char[3]>(); 85 test_is_not_abstract<char[]>(); 86 test_is_not_abstract<Union>(); 87 test_is_not_abstract<Empty>(); 88 test_is_not_abstract<bit_zero>(); 89 test_is_not_abstract<NotEmpty>(); 90 91 test_is_abstract<Abstract>(); 92 test_is_abstract<AbstractTemplate<int> >(); 93 test_is_not_abstract<AbstractTemplate<double> >(); 94 } 95
