//===----------------------------------------------------------------------===// // // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // See https://llvm.org/LICENSE.txt for license information. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// // // template OutIter, // Predicate Pred> // requires CopyConstructible // constexpr OutIter // constexpr after C++17 // copy_if(InIter first, InIter last, OutIter result, Pred pred); #include #include #include "test_macros.h" #include "test_iterators.h" #include "type_algorithms.h" struct Pred { TEST_CONSTEXPR_CXX14 bool operator()(int i) { return i % 3 == 0; } }; template struct TestOutIters { template TEST_CONSTEXPR_CXX20 void operator()() { const unsigned N = 1000; int ia[N] = {}; for (unsigned i = 0; i < N; ++i) ia[i] = i; int ib[N] = {0}; OutIter r = std::copy_if(InIter(ia), InIter(ia + N), OutIter(ib), Pred()); assert(base(r) == ib + N / 3 + 1); for (unsigned i = 0; i < N / 3 + 1; ++i) assert(ib[i] % 3 == 0); } }; struct TestInIters { template TEST_CONSTEXPR_CXX20 void operator()() { types::for_each( types::concatenate_t, types::type_list > >(), TestOutIters()); } }; TEST_CONSTEXPR_CXX20 bool test() { types::for_each(types::cpp17_input_iterator_list(), TestInIters()); return true; } int main(int, char**) { test(); #if TEST_STD_VER > 17 static_assert(test()); #endif return 0; }