1 //===----------------------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 // <algorithm> 10 11 // template<InputIterator InIter, OutputIterator<auto, InIter::reference> OutIter, 12 // Predicate<auto, InIter::value_type> Pred> 13 // requires CopyConstructible<Pred> 14 // constexpr OutIter // constexpr after C++17 15 // remove_copy_if(InIter first, InIter last, OutIter result, Pred pred); 16 17 #include <algorithm> 18 #include <functional> 19 #include <cassert> 20 21 #include "test_macros.h" 22 #include "test_iterators.h" 23 24 TEST_CONSTEXPR bool equalToTwo(int v) { return v == 2; } 25 26 #if TEST_STD_VER > 17 27 TEST_CONSTEXPR bool test_constexpr() { 28 int ia[] = {1, 3, 5, 2, 5, 6}; 29 int ib[std::size(ia)] = {0}; 30 31 auto it = std::remove_copy_if(std::begin(ia), std::end(ia), std::begin(ib), equalToTwo); 32 33 return std::distance(std::begin(ib), it) == static_cast<int>(std::size(ia) - 1) // we removed one element 34 && std::none_of(std::begin(ib), it, equalToTwo) 35 && std::all_of (it, std::end(ib), [](int a) {return a == 0;}) 36 ; 37 } 38 #endif 39 40 template <class InIter, class OutIter> 41 void 42 test() 43 { 44 int ia[] = {0, 1, 2, 3, 4, 2, 3, 4, 2}; 45 const unsigned sa = sizeof(ia)/sizeof(ia[0]); 46 int ib[sa]; 47 OutIter r = std::remove_copy_if(InIter(ia), InIter(ia+sa), 48 OutIter(ib), equalToTwo); 49 assert(base(r) == ib + sa-3); 50 assert(ib[0] == 0); 51 assert(ib[1] == 1); 52 assert(ib[2] == 3); 53 assert(ib[3] == 4); 54 assert(ib[4] == 3); 55 assert(ib[5] == 4); 56 } 57 58 int main(int, char**) 59 { 60 test<input_iterator<const int*>, output_iterator<int*> >(); 61 test<input_iterator<const int*>, forward_iterator<int*> >(); 62 test<input_iterator<const int*>, bidirectional_iterator<int*> >(); 63 test<input_iterator<const int*>, random_access_iterator<int*> >(); 64 test<input_iterator<const int*>, int*>(); 65 66 test<forward_iterator<const int*>, output_iterator<int*> >(); 67 test<forward_iterator<const int*>, forward_iterator<int*> >(); 68 test<forward_iterator<const int*>, bidirectional_iterator<int*> >(); 69 test<forward_iterator<const int*>, random_access_iterator<int*> >(); 70 test<forward_iterator<const int*>, int*>(); 71 72 test<bidirectional_iterator<const int*>, output_iterator<int*> >(); 73 test<bidirectional_iterator<const int*>, forward_iterator<int*> >(); 74 test<bidirectional_iterator<const int*>, bidirectional_iterator<int*> >(); 75 test<bidirectional_iterator<const int*>, random_access_iterator<int*> >(); 76 test<bidirectional_iterator<const int*>, int*>(); 77 78 test<random_access_iterator<const int*>, output_iterator<int*> >(); 79 test<random_access_iterator<const int*>, forward_iterator<int*> >(); 80 test<random_access_iterator<const int*>, bidirectional_iterator<int*> >(); 81 test<random_access_iterator<const int*>, random_access_iterator<int*> >(); 82 test<random_access_iterator<const int*>, int*>(); 83 84 test<const int*, output_iterator<int*> >(); 85 test<const int*, forward_iterator<int*> >(); 86 test<const int*, bidirectional_iterator<int*> >(); 87 test<const int*, random_access_iterator<int*> >(); 88 test<const int*, int*>(); 89 90 #if TEST_STD_VER > 17 91 static_assert(test_constexpr()); 92 #endif 93 94 return 0; 95 } 96