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//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// <algorithm>
// template <class InputIterator, class OutputIterator1,
// class OutputIterator2, class Predicate>
// constexpr pair<OutputIterator1, OutputIterator2> // constexpr after C++17
// partition_copy(InputIterator first, InputIterator last,
// OutputIterator1 out_true, OutputIterator2 out_false,
// Predicate pred);
#include <algorithm>
#include <cassert>
#include "test_macros.h"
#include "test_iterators.h"
struct is_odd
{
TEST_CONSTEXPR bool operator()(const int& i) const {return i & 1;}
};
#if TEST_STD_VER > 17
TEST_CONSTEXPR bool test_constexpr() {
int ia[] = {1, 3, 5, 2, 4, 6};
int r1[10] = {0};
int r2[10] = {0};
auto p = std::partition_copy(std::begin(ia), std::end(ia),
std::begin(r1), std::begin(r2), is_odd());
return std::all_of(std::begin(r1), p.first, is_odd())
&& std::all_of(p.first, std::end(r1), [](int a){return a == 0;})
&& std::none_of(std::begin(r2), p.second, is_odd())
&& std::all_of(p.second, std::end(r2), [](int a){return a == 0;})
;
}
#endif
int main()
{
{
const int ia[] = {1, 2, 3, 4, 6, 8, 5, 7};
int r1[10] = {0};
int r2[10] = {0};
typedef std::pair<output_iterator<int*>, int*> P;
P p = std::partition_copy(input_iterator<const int*>(std::begin(ia)),
input_iterator<const int*>(std::end(ia)),
output_iterator<int*>(r1), r2, is_odd());
assert(p.first.base() == r1 + 4);
assert(r1[0] == 1);
assert(r1[1] == 3);
assert(r1[2] == 5);
assert(r1[3] == 7);
assert(p.second == r2 + 4);
assert(r2[0] == 2);
assert(r2[1] == 4);
assert(r2[2] == 6);
assert(r2[3] == 8);
}
#if TEST_STD_VER > 17
static_assert(test_constexpr());
#endif
}
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