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, class T> 12 // requires HasEqualTo<InIter::value_type, T> 13 // constexpr OutIter // constexpr after C++17 14 // remove_copy(InIter first, InIter last, OutIter result, const T& value); 15 16 #include <algorithm> 17 #include <cassert> 18 19 #include "test_macros.h" 20 #include "test_iterators.h" 21 22 #if TEST_STD_VER > 17 23 TEST_CONSTEXPR bool test_constexpr() { 24 int ia[] = {1, 3, 5, 2, 5, 6}; 25 int ib[std::size(ia)] = {0}; 26 27 auto it = std::remove_copy(std::begin(ia), std::end(ia), std::begin(ib), 5); 28 29 return std::distance(std::begin(ib), it) == (std::size(ia) - 2) // we removed two elements 30 && std::none_of(std::begin(ib), it, [](int a) {return a == 5;}) 31 && std::all_of (it, std::end(ib), [](int a) {return a == 0;}) 32 ; 33 } 34 #endif 35 36 template <class InIter, class OutIter> 37 void 38 test() 39 { 40 int ia[] = {0, 1, 2, 3, 4, 2, 3, 4, 2}; 41 const unsigned sa = sizeof(ia)/sizeof(ia[0]); 42 int ib[sa]; 43 OutIter r = std::remove_copy(InIter(ia), InIter(ia+sa), OutIter(ib), 2); 44 assert(base(r) == ib + sa-3); 45 assert(ib[0] == 0); 46 assert(ib[1] == 1); 47 assert(ib[2] == 3); 48 assert(ib[3] == 4); 49 assert(ib[4] == 3); 50 assert(ib[5] == 4); 51 } 52 53 int main() 54 { 55 test<input_iterator<const int*>, output_iterator<int*> >(); 56 test<input_iterator<const int*>, forward_iterator<int*> >(); 57 test<input_iterator<const int*>, bidirectional_iterator<int*> >(); 58 test<input_iterator<const int*>, random_access_iterator<int*> >(); 59 test<input_iterator<const int*>, int*>(); 60 61 test<forward_iterator<const int*>, output_iterator<int*> >(); 62 test<forward_iterator<const int*>, forward_iterator<int*> >(); 63 test<forward_iterator<const int*>, bidirectional_iterator<int*> >(); 64 test<forward_iterator<const int*>, random_access_iterator<int*> >(); 65 test<forward_iterator<const int*>, int*>(); 66 67 test<bidirectional_iterator<const int*>, output_iterator<int*> >(); 68 test<bidirectional_iterator<const int*>, forward_iterator<int*> >(); 69 test<bidirectional_iterator<const int*>, bidirectional_iterator<int*> >(); 70 test<bidirectional_iterator<const int*>, random_access_iterator<int*> >(); 71 test<bidirectional_iterator<const int*>, int*>(); 72 73 test<random_access_iterator<const int*>, output_iterator<int*> >(); 74 test<random_access_iterator<const int*>, forward_iterator<int*> >(); 75 test<random_access_iterator<const int*>, bidirectional_iterator<int*> >(); 76 test<random_access_iterator<const int*>, random_access_iterator<int*> >(); 77 test<random_access_iterator<const int*>, int*>(); 78 79 test<const int*, output_iterator<int*> >(); 80 test<const int*, forward_iterator<int*> >(); 81 test<const int*, bidirectional_iterator<int*> >(); 82 test<const int*, random_access_iterator<int*> >(); 83 test<const int*, int*>(); 84 85 #if TEST_STD_VER > 17 86 static_assert(test_constexpr()); 87 #endif 88 } 89