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 InIter, RandomAccessIterator RAIter> 13 // requires ShuffleIterator<RAIter> 14 // && OutputIterator<RAIter, InIter::reference> 15 // && HasLess<InIter::value_type, RAIter::value_type> 16 // && LessThanComparable<RAIter::value_type> 17 // RAIter 18 // partial_sort_copy(InIter first, InIter last, RAIter result_first, RAIter result_last); 19 20 #include <algorithm> 21 #include <cassert> 22 23 #include "test_iterators.h" 24 25 template <class Iter> 26 void 27 test_larger_sorts(unsigned N, unsigned M) 28 { 29 int* input = new int[N]; 30 int* output = new int[M]; 31 for (int i = 0; i < N; ++i) 32 input[i] = i; 33 std::random_shuffle(input, input+N); 34 int* r = std::partial_sort_copy(Iter(input), Iter(input+N), output, output+M); 35 int* e = output + std::min(N, M); 36 assert(r == e); 37 int i = 0; 38 for (int* x = output; x < e; ++x, ++i) 39 assert(*x == i); 40 delete [] output; 41 delete [] input; 42 } 43 44 template <class Iter> 45 void 46 test_larger_sorts(unsigned N) 47 { 48 test_larger_sorts<Iter>(N, 0); 49 test_larger_sorts<Iter>(N, 1); 50 test_larger_sorts<Iter>(N, 2); 51 test_larger_sorts<Iter>(N, 3); 52 test_larger_sorts<Iter>(N, N/2-1); 53 test_larger_sorts<Iter>(N, N/2); 54 test_larger_sorts<Iter>(N, N/2+1); 55 test_larger_sorts<Iter>(N, N-2); 56 test_larger_sorts<Iter>(N, N-1); 57 test_larger_sorts<Iter>(N, N); 58 test_larger_sorts<Iter>(N, N+1000); 59 } 60 61 template <class Iter> 62 void 63 test() 64 { 65 test_larger_sorts<Iter>(0, 100); 66 test_larger_sorts<Iter>(10); 67 test_larger_sorts<Iter>(256); 68 test_larger_sorts<Iter>(257); 69 test_larger_sorts<Iter>(499); 70 test_larger_sorts<Iter>(500); 71 test_larger_sorts<Iter>(997); 72 test_larger_sorts<Iter>(1000); 73 test_larger_sorts<Iter>(1009); 74 } 75 76 int main() 77 { 78 int i = 0; 79 std::partial_sort_copy(&i, &i, &i, &i+5); 80 assert(i == 0); 81 test<input_iterator<const int*> >(); 82 test<forward_iterator<const int*> >(); 83 test<bidirectional_iterator<const int*> >(); 84 test<random_access_iterator<const int*> >(); 85 test<const int*>(); 86 } 87
