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_copy_constructible 13 14 #include <type_traits> 15 16 template <class T> 17 void test_is_copy_constructible() 18 { 19 static_assert( std::is_copy_constructible<T>::value, ""); 20 } 21 22 template <class T> 23 void test_is_not_copy_constructible() 24 { 25 static_assert(!std::is_copy_constructible<T>::value, ""); 26 } 27 28 class Empty 29 { 30 }; 31 32 class NotEmpty 33 { 34 public: 35 virtual ~NotEmpty(); 36 }; 37 38 union Union {}; 39 40 struct bit_zero 41 { 42 int : 0; 43 }; 44 45 class Abstract 46 { 47 public: 48 virtual ~Abstract() = 0; 49 }; 50 51 struct A 52 { 53 A(const A&); 54 }; 55 56 class B 57 { 58 B(const B&); 59 }; 60 61 struct C 62 { 63 C(C&); // not const 64 void operator=(C&); // not const 65 }; 66 67 int main() 68 { 69 test_is_copy_constructible<A>(); 70 test_is_copy_constructible<int&>(); 71 test_is_copy_constructible<Union>(); 72 test_is_copy_constructible<Empty>(); 73 test_is_copy_constructible<int>(); 74 test_is_copy_constructible<double>(); 75 test_is_copy_constructible<int*>(); 76 test_is_copy_constructible<const int*>(); 77 test_is_copy_constructible<NotEmpty>(); 78 test_is_copy_constructible<bit_zero>(); 79 80 test_is_not_copy_constructible<char[3]>(); 81 test_is_not_copy_constructible<char[]>(); 82 test_is_not_copy_constructible<void>(); 83 test_is_not_copy_constructible<Abstract>(); 84 test_is_not_copy_constructible<C>(); 85 #if __has_feature(cxx_access_control_sfinae) 86 test_is_not_copy_constructible<B>(); 87 #endif 88 } 89
