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 // template <class T, class... Args> 13 // struct is_constructible; 14 15 #include <type_traits> 16 17 struct A 18 { 19 explicit A(int); 20 A(int, double); 21 #if __has_feature(cxx_access_control_sfinae) 22 private: 23 #endif 24 A(char); 25 }; 26 27 class Abstract 28 { 29 virtual void foo() = 0; 30 }; 31 32 class AbstractDestructor 33 { 34 virtual ~AbstractDestructor() = 0; 35 }; 36 37 template <class T> 38 void test_is_constructible() 39 { 40 static_assert( (std::is_constructible<T>::value), ""); 41 } 42 43 template <class T, class A0> 44 void test_is_constructible() 45 { 46 static_assert( (std::is_constructible<T, A0>::value), ""); 47 } 48 49 template <class T, class A0, class A1> 50 void test_is_constructible() 51 { 52 static_assert( (std::is_constructible<T, A0, A1>::value), ""); 53 } 54 55 template <class T> 56 void test_is_not_constructible() 57 { 58 static_assert((!std::is_constructible<T>::value), ""); 59 } 60 61 template <class T, class A0> 62 void test_is_not_constructible() 63 { 64 static_assert((!std::is_constructible<T, A0>::value), ""); 65 } 66 67 int main() 68 { 69 test_is_constructible<int> (); 70 test_is_constructible<int, const int> (); 71 test_is_constructible<A, int> (); 72 test_is_constructible<A, int, double> (); 73 test_is_constructible<int&, int&> (); 74 75 test_is_not_constructible<A> (); 76 #if __has_feature(cxx_access_control_sfinae) 77 test_is_not_constructible<A, char> (); 78 #else 79 test_is_constructible<A, char> (); 80 #endif 81 test_is_not_constructible<A, void> (); 82 test_is_not_constructible<void> (); 83 test_is_not_constructible<int&> (); 84 test_is_not_constructible<Abstract> (); 85 test_is_not_constructible<AbstractDestructor> (); 86 } 87
