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 // Callable<auto, const InIter::value_type&, const InIter::value_type&> BinaryOperation> 15 // requires Constructible<InIter::value_type, InIter::reference> 16 // && OutputIterator<OutIter, BinaryOperation::result_type> 17 // && MoveAssignable<InIter::value_type> 18 // && CopyConstructible<BinaryOperation> 19 // OutIter 20 // adjacent_difference(InIter first, InIter last, OutIter result, BinaryOperation binary_op); 21 22 #include <numeric> 23 #include <functional> 24 #include <cassert> 25 26 #include "test_macros.h" 27 #include "test_iterators.h" 28 29 template <class InIter, class OutIter> 30 void 31 test() 32 { 33 int ia[] = {15, 10, 6, 3, 1}; 34 int ir[] = {15, 25, 16, 9, 4}; 35 const unsigned s = sizeof(ia) / sizeof(ia[0]); 36 int ib[s] = {0}; 37 OutIter r = std::adjacent_difference(InIter(ia), InIter(ia+s), OutIter(ib), 38 std::plus<int>()); 39 assert(base(r) == ib + s); 40 for (unsigned i = 0; i < s; ++i) 41 assert(ib[i] == ir[i]); 42 } 43 44 #if TEST_STD_VER >= 11 45 46 class Y; 47 48 class X 49 { 50 int i_; 51 52 X& operator=(const X&); 53 public: 54 explicit X(int i) : i_(i) {} 55 X(const X& x) : i_(x.i_) {} 56 X& operator=(X&& x) 57 { 58 i_ = x.i_; 59 x.i_ = -1; 60 return *this; 61 } 62 63 friend X operator-(const X& x, const X& y) {return X(x.i_ - y.i_);} 64 65 friend class Y; 66 }; 67 68 class Y 69 { 70 int i_; 71 72 Y& operator=(const Y&); 73 public: 74 explicit Y(int i) : i_(i) {} 75 Y(const Y& y) : i_(y.i_) {} 76 void operator=(const X& x) {i_ = x.i_;} 77 }; 78 79 #endif 80 81 82 int main() 83 { 84 test<input_iterator<const int*>, output_iterator<int*> >(); 85 test<input_iterator<const int*>, forward_iterator<int*> >(); 86 test<input_iterator<const int*>, bidirectional_iterator<int*> >(); 87 test<input_iterator<const int*>, random_access_iterator<int*> >(); 88 test<input_iterator<const int*>, int*>(); 89 90 test<forward_iterator<const int*>, output_iterator<int*> >(); 91 test<forward_iterator<const int*>, forward_iterator<int*> >(); 92 test<forward_iterator<const int*>, bidirectional_iterator<int*> >(); 93 test<forward_iterator<const int*>, random_access_iterator<int*> >(); 94 test<forward_iterator<const int*>, int*>(); 95 96 test<bidirectional_iterator<const int*>, output_iterator<int*> >(); 97 test<bidirectional_iterator<const int*>, forward_iterator<int*> >(); 98 test<bidirectional_iterator<const int*>, bidirectional_iterator<int*> >(); 99 test<bidirectional_iterator<const int*>, random_access_iterator<int*> >(); 100 test<bidirectional_iterator<const int*>, int*>(); 101 102 test<random_access_iterator<const int*>, output_iterator<int*> >(); 103 test<random_access_iterator<const int*>, forward_iterator<int*> >(); 104 test<random_access_iterator<const int*>, bidirectional_iterator<int*> >(); 105 test<random_access_iterator<const int*>, random_access_iterator<int*> >(); 106 test<random_access_iterator<const int*>, int*>(); 107 108 test<const int*, output_iterator<int*> >(); 109 test<const int*, forward_iterator<int*> >(); 110 test<const int*, bidirectional_iterator<int*> >(); 111 test<const int*, random_access_iterator<int*> >(); 112 test<const int*, int*>(); 113 114 #if TEST_STD_VER >= 11 115 X x[3] = {X(1), X(2), X(3)}; 116 Y y[3] = {Y(1), Y(2), Y(3)}; 117 std::adjacent_difference(x, x+3, y, std::minus<X>()); 118 #endif 119 } 120
