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