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 // <numeric> 11 12 // template <InputIterator InIter, 13 // OutputIterator<auto, const InIter::value_type&> OutIter> 14 // requires HasMinus<InIter::value_type, InIter::value_type> 15 // && Constructible<InIter::value_type, InIter::reference> 16 // && OutputIterator<OutIter, 17 // HasMinus<InIter::value_type, InIter::value_type>::result_type> 18 // && MoveAssignable<InIter::value_type> 19 // OutIter 20 // adjacent_difference(InIter first, InIter last, OutIter result); 21 22 #include <numeric> 23 #include <cassert> 24 25 #include "test_macros.h" 26 #include "test_iterators.h" 27 28 template <class InIter, class OutIter> 29 void 30 test() 31 { 32 int ia[] = {15, 10, 6, 3, 1}; 33 int ir[] = {15, -5, -4, -3, -2}; 34 const unsigned s = sizeof(ia) / sizeof(ia[0]); 35 int ib[s] = {0}; 36 OutIter r = std::adjacent_difference(InIter(ia), InIter(ia+s), OutIter(ib)); 37 assert(base(r) == ib + s); 38 for (unsigned i = 0; i < s; ++i) 39 assert(ib[i] == ir[i]); 40 } 41 42 #if TEST_STD_VER >= 11 43 44 class Y; 45 46 class X 47 { 48 int i_; 49 50 X& operator=(const X&); 51 public: 52 explicit X(int i) : i_(i) {} 53 X(const X& x) : i_(x.i_) {} 54 X& operator=(X&& x) 55 { 56 i_ = x.i_; 57 x.i_ = -1; 58 return *this; 59 } 60 61 friend X operator-(const X& x, const X& y) {return X(x.i_ - y.i_);} 62 63 friend class Y; 64 }; 65 66 class Y 67 { 68 int i_; 69 70 Y& operator=(const Y&); 71 public: 72 explicit Y(int i) : i_(i) {} 73 Y(const Y& y) : i_(y.i_) {} 74 void operator=(const X& x) {i_ = x.i_;} 75 }; 76 77 #endif 78 79 int main() 80 { 81 test<input_iterator<const int*>, output_iterator<int*> >(); 82 test<input_iterator<const int*>, forward_iterator<int*> >(); 83 test<input_iterator<const int*>, bidirectional_iterator<int*> >(); 84 test<input_iterator<const int*>, random_access_iterator<int*> >(); 85 test<input_iterator<const int*>, int*>(); 86 87 test<forward_iterator<const int*>, output_iterator<int*> >(); 88 test<forward_iterator<const int*>, forward_iterator<int*> >(); 89 test<forward_iterator<const int*>, bidirectional_iterator<int*> >(); 90 test<forward_iterator<const int*>, random_access_iterator<int*> >(); 91 test<forward_iterator<const int*>, int*>(); 92 93 test<bidirectional_iterator<const int*>, output_iterator<int*> >(); 94 test<bidirectional_iterator<const int*>, forward_iterator<int*> >(); 95 test<bidirectional_iterator<const int*>, bidirectional_iterator<int*> >(); 96 test<bidirectional_iterator<const int*>, random_access_iterator<int*> >(); 97 test<bidirectional_iterator<const int*>, int*>(); 98 99 test<random_access_iterator<const int*>, output_iterator<int*> >(); 100 test<random_access_iterator<const int*>, forward_iterator<int*> >(); 101 test<random_access_iterator<const int*>, bidirectional_iterator<int*> >(); 102 test<random_access_iterator<const int*>, random_access_iterator<int*> >(); 103 test<random_access_iterator<const int*>, int*>(); 104 105 test<const int*, output_iterator<int*> >(); 106 test<const int*, forward_iterator<int*> >(); 107 test<const int*, bidirectional_iterator<int*> >(); 108 test<const int*, random_access_iterator<int*> >(); 109 test<const int*, int*>(); 110 111 #if TEST_STD_VER >= 11 112 X x[3] = {X(1), X(2), X(3)}; 113 Y y[3] = {Y(1), Y(2), Y(3)}; 114 std::adjacent_difference(x, x+3, y); 115 #endif 116 } 117
