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, class Compare> 13 // requires ShuffleIterator<RAIter> 14 // && OutputIterator<RAIter, InIter::reference> 15 // && Predicate<Compare, InIter::value_type, RAIter::value_type> 16 // && StrictWeakOrder<Compare, RAIter::value_type>} 17 // && CopyConstructible<Compare> 18 // RAIter 19 // partial_sort_copy(InIter first, InIter last, 20 // RAIter result_first, RAIter result_last, Compare comp); 21 22 #include <algorithm> 23 #include <functional> 24 #include <cassert> 25 26 #include "test_iterators.h" 27 28 template <class Iter> 29 void 30 test_larger_sorts(unsigned N, unsigned M) 31 { 32 int* input = new int[N]; 33 int* output = new int[M]; 34 for (int i = 0; i < N; ++i) 35 input[i] = i; 36 std::random_shuffle(input, input+N); 37 int* r = std::partial_sort_copy(Iter(input), Iter(input+N), output, output+M, 38 std::greater<int>()); 39 int* e = output + std::min(N, M); 40 assert(r == e); 41 int i = 0; 42 for (int* x = output; x < e; ++x, ++i) 43 assert(*x == N-i-1); 44 delete [] output; 45 delete [] input; 46 } 47 48 template <class Iter> 49 void 50 test_larger_sorts(unsigned N) 51 { 52 test_larger_sorts<Iter>(N, 0); 53 test_larger_sorts<Iter>(N, 1); 54 test_larger_sorts<Iter>(N, 2); 55 test_larger_sorts<Iter>(N, 3); 56 test_larger_sorts<Iter>(N, N/2-1); 57 test_larger_sorts<Iter>(N, N/2); 58 test_larger_sorts<Iter>(N, N/2+1); 59 test_larger_sorts<Iter>(N, N-2); 60 test_larger_sorts<Iter>(N, N-1); 61 test_larger_sorts<Iter>(N, N); 62 test_larger_sorts<Iter>(N, N+1000); 63 } 64 65 template <class Iter> 66 void 67 test() 68 { 69 test_larger_sorts<Iter>(0, 100); 70 test_larger_sorts<Iter>(10); 71 test_larger_sorts<Iter>(256); 72 test_larger_sorts<Iter>(257); 73 test_larger_sorts<Iter>(499); 74 test_larger_sorts<Iter>(500); 75 test_larger_sorts<Iter>(997); 76 test_larger_sorts<Iter>(1000); 77 test_larger_sorts<Iter>(1009); 78 } 79 80 int main() 81 { 82 int i = 0; 83 std::partial_sort_copy(&i, &i, &i, &i+5); 84 assert(i == 0); 85 test<input_iterator<const int*> >(); 86 test<forward_iterator<const int*> >(); 87 test<bidirectional_iterator<const int*> >(); 88 test<random_access_iterator<const int*> >(); 89 test<const int*>(); 90 } 91
