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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<InputIterator Iter1, InputIterator Iter2>
// requires HasLess<Iter1::value_type, Iter2::value_type>
// && HasLess<Iter2::value_type, Iter1::value_type>
// constexpr bool // constexpr after C++17
// includes(Iter1 first1, Iter1 last1, Iter2 first2, Iter2 last2);
#include <algorithm>
#include <cassert>
#include "test_macros.h"
#include "test_iterators.h"
#if TEST_STD_VER > 17
TEST_CONSTEXPR bool test_constexpr() {
int ia[] = {1, 2, 2, 3, 3, 3, 4, 4, 4, 4};
int ib[] = {2, 4};
int ic[] = {3, 3, 3, 3};
return std::includes(std::begin(ia), std::end(ia), std::begin(ib), std::end(ib))
&& !std::includes(std::begin(ia), std::end(ia), std::begin(ic), std::end(ic))
;
}
#endif
template <class Iter1, class Iter2>
void
test()
{
int ia[] = {1, 2, 2, 3, 3, 3, 4, 4, 4, 4};
const unsigned sa = sizeof(ia)/sizeof(ia[0]);
int ib[] = {2, 4};
const unsigned sb = sizeof(ib)/sizeof(ib[0]);
int ic[] = {1, 2};
const unsigned sc = sizeof(ic)/sizeof(ic[0]); ((void)sc);
int id[] = {3, 3, 3, 3};
const unsigned sd = sizeof(id)/sizeof(id[0]); ((void)sd);
assert(std::includes(Iter1(ia), Iter1(ia), Iter2(ib), Iter2(ib)));
assert(!std::includes(Iter1(ia), Iter1(ia), Iter2(ib), Iter2(ib+1)));
assert(std::includes(Iter1(ia), Iter1(ia+1), Iter2(ib), Iter2(ib)));
assert(std::includes(Iter1(ia), Iter1(ia+sa), Iter2(ia), Iter2(ia+sa)));
assert(std::includes(Iter1(ia), Iter1(ia+sa), Iter2(ib), Iter2(ib+sb)));
assert(!std::includes(Iter1(ib), Iter1(ib+sb), Iter2(ia), Iter2(ia+sa)));
assert(std::includes(Iter1(ia), Iter1(ia+2), Iter2(ic), Iter2(ic+2)));
assert(!std::includes(Iter1(ia), Iter1(ia+2), Iter2(ib), Iter2(ib+2)));
assert(std::includes(Iter1(ia), Iter1(ia+sa), Iter2(id), Iter2(id+1)));
assert(std::includes(Iter1(ia), Iter1(ia+sa), Iter2(id), Iter2(id+2)));
assert(std::includes(Iter1(ia), Iter1(ia+sa), Iter2(id), Iter2(id+3)));
assert(!std::includes(Iter1(ia), Iter1(ia+sa), Iter2(id), Iter2(id+4)));
}
int main()
{
test<input_iterator<const int*>, input_iterator<const int*> >();
test<input_iterator<const int*>, forward_iterator<const int*> >();
test<input_iterator<const int*>, bidirectional_iterator<const int*> >();
test<input_iterator<const int*>, random_access_iterator<const int*> >();
test<input_iterator<const int*>, const int*>();
test<forward_iterator<const int*>, input_iterator<const int*> >();
test<forward_iterator<const int*>, forward_iterator<const int*> >();
test<forward_iterator<const int*>, bidirectional_iterator<const int*> >();
test<forward_iterator<const int*>, random_access_iterator<const int*> >();
test<forward_iterator<const int*>, const int*>();
test<bidirectional_iterator<const int*>, input_iterator<const int*> >();
test<bidirectional_iterator<const int*>, forward_iterator<const int*> >();
test<bidirectional_iterator<const int*>, bidirectional_iterator<const int*> >();
test<bidirectional_iterator<const int*>, random_access_iterator<const int*> >();
test<bidirectional_iterator<const int*>, const int*>();
test<random_access_iterator<const int*>, input_iterator<const int*> >();
test<random_access_iterator<const int*>, forward_iterator<const int*> >();
test<random_access_iterator<const int*>, bidirectional_iterator<const int*> >();
test<random_access_iterator<const int*>, random_access_iterator<const int*> >();
test<random_access_iterator<const int*>, const int*>();
test<const int*, input_iterator<const int*> >();
test<const int*, forward_iterator<const int*> >();
test<const int*, bidirectional_iterator<const int*> >();
test<const int*, random_access_iterator<const int*> >();
test<const int*, const int*>();
#if TEST_STD_VER > 17
static_assert(test_constexpr());
#endif
}
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