96 lines · cpp
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-exception6//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++1715// 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 24TEST_CONSTEXPR bool equalToTwo(int v) { return v == 2; }25 26#if TEST_STD_VER > 1727TEST_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 element34 && std::none_of(std::begin(ib), it, equalToTwo)35 && std::all_of (it, std::end(ib), [](int a) {return a == 0;})36 ;37 }38#endif39 40template <class InIter, class OutIter>41void42test()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 58int main(int, char**)59{60 test<cpp17_input_iterator<const int*>, cpp17_output_iterator<int*> >();61 test<cpp17_input_iterator<const int*>, forward_iterator<int*> >();62 test<cpp17_input_iterator<const int*>, bidirectional_iterator<int*> >();63 test<cpp17_input_iterator<const int*>, random_access_iterator<int*> >();64 test<cpp17_input_iterator<const int*>, int*>();65 66 test<forward_iterator<const int*>, cpp17_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*>, cpp17_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*>, cpp17_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*, cpp17_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 > 1791 static_assert(test_constexpr());92#endif93 94 return 0;95}96