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// <algorithm> 11 12// template<InputIterator InIter1, InputIterator InIter2, typename OutIter, 13// Predicate<auto, InIter2::value_type, InIter1::value_type> Compare> 14// requires OutputIterator<OutIter, InIter1::reference> 15// && OutputIterator<OutIter, InIter2::reference> 16// && CopyConstructible<Compare> 17// OutIter 18// merge(InIter1 first1, InIter1 last1, 19// InIter2 first2, InIter2 last2, OutIter result, Compare comp); 20 21#include <algorithm> 22#include <functional> 23#include <cassert> 24 25#include "test_iterators.h" 26 27template <class InIter1, class InIter2, class OutIter> 28void 29test() 30{ 31 { 32 unsigned N = 100000; 33 int* ia = new int[N]; 34 int* ib = new int[N]; 35 int* ic = new int[2*N]; 36 for (unsigned i = 0; i < N; ++i) 37 ia[i] = 2*i; 38 for (unsigned i = 0; i < N; ++i) 39 ib[i] = 2*i+1; 40 std::reverse(ia, ia+N); 41 std::reverse(ib, ib+N); 42 OutIter r = std::merge(InIter1(ia), InIter1(ia+N), 43 InIter2(ib), InIter2(ib+N), OutIter(ic), std::greater<int>()); 44 assert(base(r) == ic+2*N); 45 assert(ic[0] == 2*N-1); 46 assert(ic[2*N-1] == 0); 47 assert(std::is_sorted(ic, ic+2*N, std::greater<int>())); 48 delete [] ic; 49 delete [] ib; 50 delete [] ia; 51 } 52 { 53 unsigned N = 100; 54 int* ia = new int[N]; 55 int* ib = new int[N]; 56 int* ic = new int[2*N]; 57 for (unsigned i = 0; i < 2*N; ++i) 58 ic[i] = i; 59 std::random_shuffle(ic, ic+2*N); 60 std::copy(ic, ic+N, ia); 61 std::copy(ic+N, ic+2*N, ib); 62 std::sort(ia, ia+N, std::greater<int>()); 63 std::sort(ib, ib+N, std::greater<int>()); 64 OutIter r = std::merge(InIter1(ia), InIter1(ia+N), 65 InIter2(ib), InIter2(ib+N), OutIter(ic), std::greater<int>()); 66 assert(base(r) == ic+2*N); 67 assert(ic[0] == 2*N-1); 68 assert(ic[2*N-1] == 0); 69 assert(std::is_sorted(ic, ic+2*N, std::greater<int>())); 70 delete [] ic; 71 delete [] ib; 72 delete [] ia; 73 } 74} 75 76int main() 77{ 78 test<input_iterator<const int*>, input_iterator<const int*>, output_iterator<int*> >(); 79 test<input_iterator<const int*>, input_iterator<const int*>, forward_iterator<int*> >(); 80 test<input_iterator<const int*>, input_iterator<const int*>, bidirectional_iterator<int*> >(); 81 test<input_iterator<const int*>, input_iterator<const int*>, random_access_iterator<int*> >(); 82 test<input_iterator<const int*>, input_iterator<const int*>, int*>(); 83 84 test<input_iterator<const int*>, forward_iterator<const int*>, output_iterator<int*> >(); 85 test<input_iterator<const int*>, forward_iterator<const int*>, forward_iterator<int*> >(); 86 test<input_iterator<const int*>, forward_iterator<const int*>, bidirectional_iterator<int*> >(); 87 test<input_iterator<const int*>, forward_iterator<const int*>, random_access_iterator<int*> >(); 88 test<input_iterator<const int*>, forward_iterator<const int*>, int*>(); 89 90 test<input_iterator<const int*>, bidirectional_iterator<const int*>, output_iterator<int*> >(); 91 test<input_iterator<const int*>, bidirectional_iterator<const int*>, forward_iterator<int*> >(); 92 test<input_iterator<const int*>, bidirectional_iterator<const int*>, bidirectional_iterator<int*> >(); 93 test<input_iterator<const int*>, bidirectional_iterator<const int*>, random_access_iterator<int*> >(); 94 test<input_iterator<const int*>, bidirectional_iterator<const int*>, int*>(); 95 96 test<input_iterator<const int*>, random_access_iterator<const int*>, output_iterator<int*> >(); 97 test<input_iterator<const int*>, random_access_iterator<const int*>, forward_iterator<int*> >(); 98 test<input_iterator<const int*>, random_access_iterator<const int*>, bidirectional_iterator<int*> >(); 99 test<input_iterator<const int*>, random_access_iterator<const int*>, random_access_iterator<int*> >(); 100 test<input_iterator<const int*>, random_access_iterator<const int*>, int*>(); 101 102 test<input_iterator<const int*>, const int*, output_iterator<int*> >(); 103 test<input_iterator<const int*>, const int*, forward_iterator<int*> >(); 104 test<input_iterator<const int*>, const int*, bidirectional_iterator<int*> >(); 105 test<input_iterator<const int*>, const int*, random_access_iterator<int*> >(); 106 test<input_iterator<const int*>, const int*, int*>(); 107 108 test<forward_iterator<const int*>, input_iterator<const int*>, output_iterator<int*> >(); 109 test<forward_iterator<const int*>, input_iterator<const int*>, forward_iterator<int*> >(); 110 test<forward_iterator<const int*>, input_iterator<const int*>, bidirectional_iterator<int*> >(); 111 test<forward_iterator<const int*>, input_iterator<const int*>, random_access_iterator<int*> >(); 112 test<forward_iterator<const int*>, input_iterator<const int*>, int*>(); 113 114 test<forward_iterator<const int*>, forward_iterator<const int*>, output_iterator<int*> >(); 115 test<forward_iterator<const int*>, forward_iterator<const int*>, forward_iterator<int*> >(); 116 test<forward_iterator<const int*>, forward_iterator<const int*>, bidirectional_iterator<int*> >(); 117 test<forward_iterator<const int*>, forward_iterator<const int*>, random_access_iterator<int*> >(); 118 test<forward_iterator<const int*>, forward_iterator<const int*>, int*>(); 119 120 test<forward_iterator<const int*>, bidirectional_iterator<const int*>, output_iterator<int*> >(); 121 test<forward_iterator<const int*>, bidirectional_iterator<const int*>, forward_iterator<int*> >(); 122 test<forward_iterator<const int*>, bidirectional_iterator<const int*>, bidirectional_iterator<int*> >(); 123 test<forward_iterator<const int*>, bidirectional_iterator<const int*>, random_access_iterator<int*> >(); 124 test<forward_iterator<const int*>, bidirectional_iterator<const int*>, int*>(); 125 126 test<forward_iterator<const int*>, random_access_iterator<const int*>, output_iterator<int*> >(); 127 test<forward_iterator<const int*>, random_access_iterator<const int*>, forward_iterator<int*> >(); 128 test<forward_iterator<const int*>, random_access_iterator<const int*>, bidirectional_iterator<int*> >(); 129 test<forward_iterator<const int*>, random_access_iterator<const int*>, random_access_iterator<int*> >(); 130 test<forward_iterator<const int*>, random_access_iterator<const int*>, int*>(); 131 132 test<forward_iterator<const int*>, const int*, output_iterator<int*> >(); 133 test<forward_iterator<const int*>, const int*, forward_iterator<int*> >(); 134 test<forward_iterator<const int*>, const int*, bidirectional_iterator<int*> >(); 135 test<forward_iterator<const int*>, const int*, random_access_iterator<int*> >(); 136 test<forward_iterator<const int*>, const int*, int*>(); 137 138 test<bidirectional_iterator<const int*>, input_iterator<const int*>, output_iterator<int*> >(); 139 test<bidirectional_iterator<const int*>, input_iterator<const int*>, bidirectional_iterator<int*> >(); 140 test<bidirectional_iterator<const int*>, input_iterator<const int*>, bidirectional_iterator<int*> >(); 141 test<bidirectional_iterator<const int*>, input_iterator<const int*>, random_access_iterator<int*> >(); 142 test<bidirectional_iterator<const int*>, input_iterator<const int*>, int*>(); 143 144 test<bidirectional_iterator<const int*>, forward_iterator<const int*>, output_iterator<int*> >(); 145 test<bidirectional_iterator<const int*>, forward_iterator<const int*>, forward_iterator<int*> >(); 146 test<bidirectional_iterator<const int*>, forward_iterator<const int*>, bidirectional_iterator<int*> >(); 147 test<bidirectional_iterator<const int*>, forward_iterator<const int*>, random_access_iterator<int*> >(); 148 test<bidirectional_iterator<const int*>, forward_iterator<const int*>, int*>(); 149 150 test<bidirectional_iterator<const int*>, bidirectional_iterator<const int*>, output_iterator<int*> >(); 151 test<bidirectional_iterator<const int*>, bidirectional_iterator<const int*>, forward_iterator<int*> >(); 152 test<bidirectional_iterator<const int*>, bidirectional_iterator<const int*>, bidirectional_iterator<int*> >(); 153 test<bidirectional_iterator<const int*>, bidirectional_iterator<const int*>, random_access_iterator<int*> >(); 154 test<bidirectional_iterator<const int*>, bidirectional_iterator<const int*>, int*>(); 155 156 test<bidirectional_iterator<const int*>, random_access_iterator<const int*>, output_iterator<int*> >(); 157 test<bidirectional_iterator<const int*>, random_access_iterator<const int*>, forward_iterator<int*> >(); 158 test<bidirectional_iterator<const int*>, random_access_iterator<const int*>, bidirectional_iterator<int*> >(); 159 test<bidirectional_iterator<const int*>, random_access_iterator<const int*>, random_access_iterator<int*> >(); 160 test<bidirectional_iterator<const int*>, random_access_iterator<const int*>, int*>(); 161 162 test<bidirectional_iterator<const int*>, const int*, output_iterator<int*> >(); 163 test<bidirectional_iterator<const int*>, const int*, forward_iterator<int*> >(); 164 test<bidirectional_iterator<const int*>, const int*, bidirectional_iterator<int*> >(); 165 test<bidirectional_iterator<const int*>, const int*, random_access_iterator<int*> >(); 166 test<bidirectional_iterator<const int*>, const int*, int*>(); 167 168 test<random_access_iterator<const int*>, input_iterator<const int*>, output_iterator<int*> >(); 169 test<random_access_iterator<const int*>, input_iterator<const int*>, bidirectional_iterator<int*> >(); 170 test<random_access_iterator<const int*>, input_iterator<const int*>, bidirectional_iterator<int*> >(); 171 test<random_access_iterator<const int*>, input_iterator<const int*>, random_access_iterator<int*> >(); 172 test<random_access_iterator<const int*>, input_iterator<const int*>, int*>(); 173 174 test<random_access_iterator<const int*>, forward_iterator<const int*>, output_iterator<int*> >(); 175 test<random_access_iterator<const int*>, forward_iterator<const int*>, forward_iterator<int*> >(); 176 test<random_access_iterator<const int*>, forward_iterator<const int*>, bidirectional_iterator<int*> >(); 177 test<random_access_iterator<const int*>, forward_iterator<const int*>, random_access_iterator<int*> >(); 178 test<random_access_iterator<const int*>, forward_iterator<const int*>, int*>(); 179 180 test<random_access_iterator<const int*>, bidirectional_iterator<const int*>, output_iterator<int*> >(); 181 test<random_access_iterator<const int*>, bidirectional_iterator<const int*>, forward_iterator<int*> >(); 182 test<random_access_iterator<const int*>, bidirectional_iterator<const int*>, bidirectional_iterator<int*> >(); 183 test<random_access_iterator<const int*>, bidirectional_iterator<const int*>, random_access_iterator<int*> >(); 184 test<random_access_iterator<const int*>, bidirectional_iterator<const int*>, int*>(); 185 186 test<random_access_iterator<const int*>, random_access_iterator<const int*>, output_iterator<int*> >(); 187 test<random_access_iterator<const int*>, random_access_iterator<const int*>, forward_iterator<int*> >(); 188 test<random_access_iterator<const int*>, random_access_iterator<const int*>, bidirectional_iterator<int*> >(); 189 test<random_access_iterator<const int*>, random_access_iterator<const int*>, random_access_iterator<int*> >(); 190 test<random_access_iterator<const int*>, random_access_iterator<const int*>, int*>(); 191 192 test<random_access_iterator<const int*>, const int*, output_iterator<int*> >(); 193 test<random_access_iterator<const int*>, const int*, forward_iterator<int*> >(); 194 test<random_access_iterator<const int*>, const int*, bidirectional_iterator<int*> >(); 195 test<random_access_iterator<const int*>, const int*, random_access_iterator<int*> >(); 196 test<random_access_iterator<const int*>, const int*, int*>(); 197 198 test<const int*, input_iterator<const int*>, output_iterator<int*> >(); 199 test<const int*, input_iterator<const int*>, bidirectional_iterator<int*> >(); 200 test<const int*, input_iterator<const int*>, bidirectional_iterator<int*> >(); 201 test<const int*, input_iterator<const int*>, random_access_iterator<int*> >(); 202 test<const int*, input_iterator<const int*>, int*>(); 203 204 test<const int*, forward_iterator<const int*>, output_iterator<int*> >(); 205 test<const int*, forward_iterator<const int*>, forward_iterator<int*> >(); 206 test<const int*, forward_iterator<const int*>, bidirectional_iterator<int*> >(); 207 test<const int*, forward_iterator<const int*>, random_access_iterator<int*> >(); 208 test<const int*, forward_iterator<const int*>, int*>(); 209 210 test<const int*, bidirectional_iterator<const int*>, output_iterator<int*> >(); 211 test<const int*, bidirectional_iterator<const int*>, forward_iterator<int*> >(); 212 test<const int*, bidirectional_iterator<const int*>, bidirectional_iterator<int*> >(); 213 test<const int*, bidirectional_iterator<const int*>, random_access_iterator<int*> >(); 214 test<const int*, bidirectional_iterator<const int*>, int*>(); 215 216 test<const int*, random_access_iterator<const int*>, output_iterator<int*> >(); 217 test<const int*, random_access_iterator<const int*>, forward_iterator<int*> >(); 218 test<const int*, random_access_iterator<const int*>, bidirectional_iterator<int*> >(); 219 test<const int*, random_access_iterator<const int*>, random_access_iterator<int*> >(); 220 test<const int*, random_access_iterator<const int*>, int*>(); 221 222 test<const int*, const int*, output_iterator<int*> >(); 223 test<const int*, const int*, forward_iterator<int*> >(); 224 test<const int*, const int*, bidirectional_iterator<int*> >(); 225 test<const int*, const int*, random_access_iterator<int*> >(); 226 test<const int*, const int*, int*>(); 227} 228