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_assignable 13 14 #include <type_traits> 15 #include "test_macros.h" 16 17 template <class T> 18 void test_is_copy_assignable() 19 { 20 static_assert(( std::is_copy_assignable<T>::value), ""); 21 #if TEST_STD_VER > 14 22 static_assert(( std::is_copy_assignable_v<T>), ""); 23 #endif 24 } 25 26 template <class T> 27 void test_is_not_copy_assignable() 28 { 29 static_assert((!std::is_copy_assignable<T>::value), ""); 30 #if TEST_STD_VER > 14 31 static_assert((!std::is_copy_assignable_v<T>), ""); 32 #endif 33 } 34 35 class Empty 36 { 37 }; 38 39 class NotEmpty 40 { 41 public: 42 virtual ~NotEmpty(); 43 }; 44 45 union Union {}; 46 47 struct bit_zero 48 { 49 int : 0; 50 }; 51 52 struct A 53 { 54 A(); 55 }; 56 57 class B 58 { 59 B& operator=(const B&); 60 }; 61 62 struct C 63 { 64 void operator=(C&); // not const 65 }; 66 67 int main() 68 { 69 test_is_copy_assignable<int> (); 70 test_is_copy_assignable<int&> (); 71 test_is_copy_assignable<A> (); 72 test_is_copy_assignable<bit_zero> (); 73 test_is_copy_assignable<Union> (); 74 test_is_copy_assignable<NotEmpty> (); 75 test_is_copy_assignable<Empty> (); 76 77 #if TEST_STD_VER >= 11 78 test_is_not_copy_assignable<const int> (); 79 test_is_not_copy_assignable<int[]> (); 80 test_is_not_copy_assignable<int[3]> (); 81 test_is_not_copy_assignable<B> (); 82 #endif 83 test_is_not_copy_assignable<void> (); 84 test_is_not_copy_assignable<C> (); 85 } 86
