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 // <iterator> 11 12 // move_iterator 13 14 // Test nested types: 15 16 // template <InputIterator Iter> 17 // class move_iterator { 18 // public: 19 // typedef Iter iterator_type; 20 // typedef Iter::difference_type difference_type; 21 // typedef Iter pointer; 22 // typedef Iter::value_type value_type; 23 // typedef value_type&& reference; 24 // }; 25 26 #include <iterator> 27 #include <type_traits> 28 29 #include "test_macros.h" 30 #include "test_iterators.h" 31 32 template <class ValueType, class Reference> 33 struct DummyIt { 34 typedef std::forward_iterator_tag iterator_category; 35 typedef ValueType value_type; 36 typedef std::ptrdiff_t difference_type; 37 typedef ValueType* pointer; 38 typedef Reference reference; 39 }; 40 41 template <class It> 42 void 43 test() 44 { 45 typedef std::move_iterator<It> R; 46 typedef std::iterator_traits<It> T; 47 static_assert((std::is_same<typename R::iterator_type, It>::value), ""); 48 static_assert((std::is_same<typename R::difference_type, typename T::difference_type>::value), ""); 49 static_assert((std::is_same<typename R::pointer, It>::value), ""); 50 static_assert((std::is_same<typename R::value_type, typename T::value_type>::value), ""); 51 #if TEST_STD_VER >= 11 52 static_assert((std::is_same<typename R::reference, typename R::value_type&&>::value), ""); 53 #else 54 static_assert((std::is_same<typename R::reference, typename T::reference>::value), ""); 55 #endif 56 static_assert((std::is_same<typename R::iterator_category, typename T::iterator_category>::value), ""); 57 } 58 59 int main() 60 { 61 test<input_iterator<char*> >(); 62 test<forward_iterator<char*> >(); 63 test<bidirectional_iterator<char*> >(); 64 test<random_access_iterator<char*> >(); 65 test<char*>(); 66 #if TEST_STD_VER >= 11 67 { 68 typedef DummyIt<int, int> T; 69 typedef std::move_iterator<T> It; 70 static_assert(std::is_same<It::reference, int>::value, ""); 71 } 72 { 73 typedef DummyIt<int, std::reference_wrapper<int> > T; 74 typedef std::move_iterator<T> It; 75 static_assert(std::is_same<It::reference, std::reference_wrapper<int> >::value, ""); 76 } 77 { 78 // Check that move_iterator uses whatever reference type it's given 79 // when it's not a reference. 80 typedef DummyIt<int, long > T; 81 typedef std::move_iterator<T> It; 82 static_assert(std::is_same<It::reference, long>::value, ""); 83 } 84 { 85 typedef DummyIt<int, int&> T; 86 typedef std::move_iterator<T> It; 87 static_assert(std::is_same<It::reference, int&&>::value, ""); 88 } 89 { 90 typedef DummyIt<int, int&&> T; 91 typedef std::move_iterator<T> It; 92 static_assert(std::is_same<It::reference, int&&>::value, ""); 93 } 94 #endif 95 } 96
