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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 HasEqualTo<Iter1::value_type, Iter2::value_type>
// constexpr bool // constexpr after c++17
// equal(Iter1 first1, Iter1 last1, Iter2 first2);
//
// Introduced in C++14:
// template<InputIterator Iter1, InputIterator Iter2>
// constexpr bool // constexpr after c++17
// equal(Iter1 first1, Iter1 last1, Iter2 first2, Iter2 last2);
#include <algorithm>
#include <cassert>
#include "test_macros.h"
#include "test_iterators.h"
template <class Iter1, class Iter2 = Iter1>
void test_equal() {
int a[] = {0, 1, 2, 3, 4, 5};
const unsigned s = sizeof(a) / sizeof(a[0]);
int b[s] = {0, 1, 2, 5, 4, 5};
assert(std::equal(Iter1(a), Iter1(a + s), Iter2(a)));
assert(std::equal(Iter2(a), Iter2(a + s), Iter1(a)));
assert(!std::equal(Iter1(a), Iter1(a + s), Iter2(b)));
#if TEST_STD_VER >= 14
assert(std::equal(Iter1(a), Iter1(a + s), Iter2(a), Iter2(a + s)));
assert(std::equal(Iter2(a), Iter2(a + s), Iter1(a), Iter1(a + s)));
assert(!std::equal(Iter1(a), Iter1(a + s), Iter2(a), Iter2(a + s - 1)));
assert(!std::equal(Iter1(a), Iter1(a + s), Iter2(b), Iter2(b + s)));
#endif
}
#if TEST_STD_VER > 17
TEST_CONSTEXPR bool test_constexpr() {
int ia[] = {1, 3, 6, 7};
int ib[] = {1, 3};
int ic[] = {1, 3, 5, 7};
typedef cpp17_input_iterator<int*> II;
typedef bidirectional_iterator<int*> BI;
return !std::equal(std::begin(ia), std::end(ia), std::begin(ic))
&& !std::equal(std::begin(ia), std::end(ia), std::begin(ic), std::end(ic))
&& std::equal(std::begin(ib), std::end(ib), std::begin(ic))
&& !std::equal(std::begin(ib), std::end(ib), std::begin(ic), std::end(ic))
&& std::equal(II(std::begin(ib)), II(std::end(ib)), II(std::begin(ic)))
&& !std::equal(BI(std::begin(ib)), BI(std::end(ib)), BI(std::begin(ic)), BI(std::end(ic)))
;
}
#endif
int main(int, char**)
{
test_equal<cpp17_input_iterator<const int*> >();
test_equal<random_access_iterator<const int*> >();
// Test all combinations of cv-qualifiers:
test_equal<int*>();
test_equal<int*, const int*>();
test_equal<int*, volatile int*>();
test_equal<int*, const volatile int*>();
test_equal<const int*>();
test_equal<const int*, volatile int*>();
test_equal<const int*, const volatile int*>();
test_equal<volatile int*>();
test_equal<volatile int*, const volatile int*>();
test_equal<const volatile int*>();
#if TEST_STD_VER > 17
static_assert(test_constexpr());
#endif
return 0;
}
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