copy_if.pass.cpp (3597B)
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 // copy_if(InIter first, InIter last, OutIter result, Pred pred); 17 18 #include <algorithm> 19 #include <cassert> 20 21 #include "test_macros.h" 22 #include "test_iterators.h" 23 24 // #if TEST_STD_VER > 17 25 // TEST_CONSTEXPR bool test_constexpr() { 26 // int ia[] = {2, 4, 6, 8, 6}; 27 // int ic[] = {0, 0, 0, 0, 0, 0}; 28 // 29 // auto p = std::copy_if(std::begin(ia), std::end(ia), std::begin(ic), is6); 30 // return std::all_of(std::begin(ic), p, [](int a){return a == 6;}) 31 // && std::all_of(p, std::end(ic), [](int a){return a == 0;}) 32 // ; 33 // } 34 // #endif 35 36 struct Pred 37 { 38 bool operator()(int i) {return i % 3 == 0;} 39 }; 40 41 template <class InIter, class OutIter> 42 void 43 test() 44 { 45 const unsigned N = 1000; 46 int ia[N]; 47 for (unsigned i = 0; i < N; ++i) 48 ia[i] = i; 49 int ib[N] = {0}; 50 51 OutIter r = std::copy_if(InIter(ia), InIter(ia+N), OutIter(ib), Pred()); 52 assert(base(r) == ib+N/3+1); 53 for (unsigned i = 0; i < N/3+1; ++i) 54 assert(ib[i] % 3 == 0); 55 } 56 57 int main() 58 { 59 test<input_iterator<const int*>, output_iterator<int*> >(); 60 test<input_iterator<const int*>, input_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*>, input_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*>, input_iterator<int*> >(); 75 test<bidirectional_iterator<const int*>, forward_iterator<int*> >(); 76 test<bidirectional_iterator<const int*>, bidirectional_iterator<int*> >(); 77 test<bidirectional_iterator<const int*>, random_access_iterator<int*> >(); 78 test<bidirectional_iterator<const int*>, int*>(); 79 80 test<random_access_iterator<const int*>, output_iterator<int*> >(); 81 test<random_access_iterator<const int*>, input_iterator<int*> >(); 82 test<random_access_iterator<const int*>, forward_iterator<int*> >(); 83 test<random_access_iterator<const int*>, bidirectional_iterator<int*> >(); 84 test<random_access_iterator<const int*>, random_access_iterator<int*> >(); 85 test<random_access_iterator<const int*>, int*>(); 86 87 test<const int*, output_iterator<int*> >(); 88 test<const int*, input_iterator<int*> >(); 89 test<const int*, forward_iterator<int*> >(); 90 test<const int*, bidirectional_iterator<int*> >(); 91 test<const int*, random_access_iterator<int*> >(); 92 test<const int*, int*>(); 93 94 // #if TEST_STD_VER > 17 95 // static_assert(test_constexpr()); 96 // #endif 97 }