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, typename OutIter, class T> 12 // requires OutputIterator<OutIter, InIter::reference> 13 // && OutputIterator<OutIter, const T&> 14 // && HasEqualTo<InIter::value_type, T> 15 // constexpr OutIter // constexpr after C++17 16 // replace_copy(InIter first, InIter last, OutIter result, const T& old_value, 17 // const T& new_value); 18 19 #include <algorithm> 20 #include <cassert> 21 22 #include "test_macros.h" 23 #include "test_iterators.h" 24 25 26 #if TEST_STD_VER > 17 27 TEST_CONSTEXPR bool test_constexpr() { 28 int ia[] = {0, 1, 2, 3, 4}; 29 int ib[] = {0, 0, 0, 0, 0, 0}; // one bigger 30 const int expected[] = {0, 1, 5, 3, 4}; 31 32 auto it = std::replace_copy(std::begin(ia), std::end(ia), std::begin(ib), 2, 5); 33 34 return it == (std::begin(ib) + std::size(ia)) 35 && *it == 0 // don't overwrite the last value in the output array 36 && std::equal(std::begin(ib), it, std::begin(expected), std::end(expected)) 37 ; 38 } 39 #endif 40 41 template <class InIter, class OutIter> 42 void 43 test() 44 { 45 int ia[] = {0, 1, 2, 3, 4}; 46 const unsigned sa = sizeof(ia)/sizeof(ia[0]); 47 int ib[sa] = {0}; 48 OutIter r = std::replace_copy(InIter(ia), InIter(ia+sa), OutIter(ib), 2, 5); 49 assert(base(r) == ib + sa); 50 assert(ib[0] == 0); 51 assert(ib[1] == 1); 52 assert(ib[2] == 5); 53 assert(ib[3] == 3); 54 assert(ib[4] == 4); 55 } 56 57 int main(int, char**) 58 { 59 test<cpp17_input_iterator<const int*>, output_iterator<int*> >(); 60 test<cpp17_input_iterator<const int*>, forward_iterator<int*> >(); 61 test<cpp17_input_iterator<const int*>, bidirectional_iterator<int*> >(); 62 test<cpp17_input_iterator<const int*>, random_access_iterator<int*> >(); 63 test<cpp17_input_iterator<const int*>, int*>(); 64 65 test<forward_iterator<const int*>, output_iterator<int*> >(); 66 test<forward_iterator<const int*>, forward_iterator<int*> >(); 67 test<forward_iterator<const int*>, bidirectional_iterator<int*> >(); 68 test<forward_iterator<const int*>, random_access_iterator<int*> >(); 69 test<forward_iterator<const int*>, int*>(); 70 71 test<bidirectional_iterator<const int*>, output_iterator<int*> >(); 72 test<bidirectional_iterator<const int*>, forward_iterator<int*> >(); 73 test<bidirectional_iterator<const int*>, bidirectional_iterator<int*> >(); 74 test<bidirectional_iterator<const int*>, random_access_iterator<int*> >(); 75 test<bidirectional_iterator<const int*>, int*>(); 76 77 test<random_access_iterator<const int*>, output_iterator<int*> >(); 78 test<random_access_iterator<const int*>, forward_iterator<int*> >(); 79 test<random_access_iterator<const int*>, bidirectional_iterator<int*> >(); 80 test<random_access_iterator<const int*>, random_access_iterator<int*> >(); 81 test<random_access_iterator<const int*>, int*>(); 82 83 test<const int*, output_iterator<int*> >(); 84 test<const int*, forward_iterator<int*> >(); 85 test<const int*, bidirectional_iterator<int*> >(); 86 test<const int*, random_access_iterator<int*> >(); 87 test<const int*, int*>(); 88 89 #if TEST_STD_VER > 17 90 static_assert(test_constexpr()); 91 #endif 92 93 return 0; 94 } 95