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, OutputIterator<auto, InIter::reference> OutIter, 13 // Predicate<auto, InIter::value_type> Pred> 14 // requires CopyConstructible<Pred> 15 // constexpr OutIter // constexpr after C++17 16 // remove_copy_if(InIter first, InIter last, OutIter result, Pred pred); 17 18 #include <algorithm> 19 #include <functional> 20 #include <cassert> 21 22 #include "test_macros.h" 23 #include "test_iterators.h" 24 25 TEST_CONSTEXPR bool equalToTwo(int v) { return v == 2; } 26 27 #if TEST_STD_VER > 17 28 TEST_CONSTEXPR bool test_constexpr() { 29 int ia[] = {1, 3, 5, 2, 5, 6}; 30 int ib[std::size(ia)] = {0}; 31 32 auto it = std::remove_copy_if(std::begin(ia), std::end(ia), std::begin(ib), equalToTwo); 33 34 return std::distance(std::begin(ib), it) == (std::size(ia) - 1) // we removed one element 35 && std::none_of(std::begin(ib), it, equalToTwo) 36 && std::all_of (it, std::end(ib), [](int a) {return a == 0;}) 37 ; 38 } 39 #endif 40 41 template <class InIter, class OutIter> 42 void 43 test() 44 { 45 int ia[] = {0, 1, 2, 3, 4, 2, 3, 4, 2}; 46 const unsigned sa = sizeof(ia)/sizeof(ia[0]); 47 int ib[sa]; 48 OutIter r = std::remove_copy_if(InIter(ia), InIter(ia+sa), 49 OutIter(ib), equalToTwo); 50 assert(base(r) == ib + sa-3); 51 assert(ib[0] == 0); 52 assert(ib[1] == 1); 53 assert(ib[2] == 3); 54 assert(ib[3] == 4); 55 assert(ib[4] == 3); 56 assert(ib[5] == 4); 57 } 58 59 int main() 60 { 61 test<input_iterator<const int*>, output_iterator<int*> >(); 62 test<input_iterator<const int*>, forward_iterator<int*> >(); 63 test<input_iterator<const int*>, bidirectional_iterator<int*> >(); 64 test<input_iterator<const int*>, random_access_iterator<int*> >(); 65 test<input_iterator<const int*>, int*>(); 66 67 test<forward_iterator<const int*>, output_iterator<int*> >(); 68 test<forward_iterator<const int*>, forward_iterator<int*> >(); 69 test<forward_iterator<const int*>, bidirectional_iterator<int*> >(); 70 test<forward_iterator<const int*>, random_access_iterator<int*> >(); 71 test<forward_iterator<const int*>, int*>(); 72 73 test<bidirectional_iterator<const int*>, output_iterator<int*> >(); 74 test<bidirectional_iterator<const int*>, forward_iterator<int*> >(); 75 test<bidirectional_iterator<const int*>, bidirectional_iterator<int*> >(); 76 test<bidirectional_iterator<const int*>, random_access_iterator<int*> >(); 77 test<bidirectional_iterator<const int*>, int*>(); 78 79 test<random_access_iterator<const int*>, output_iterator<int*> >(); 80 test<random_access_iterator<const int*>, forward_iterator<int*> >(); 81 test<random_access_iterator<const int*>, bidirectional_iterator<int*> >(); 82 test<random_access_iterator<const int*>, random_access_iterator<int*> >(); 83 test<random_access_iterator<const int*>, int*>(); 84 85 test<const int*, output_iterator<int*> >(); 86 test<const int*, forward_iterator<int*> >(); 87 test<const int*, bidirectional_iterator<int*> >(); 88 test<const int*, random_access_iterator<int*> >(); 89 test<const int*, int*>(); 90 91 #if TEST_STD_VER > 17 92 static_assert(test_constexpr()); 93 #endif 94 } 95
