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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
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17
// friend constexpr bool operator==(const iterator& x, const iterator& y);
#include <algorithm>
#include <cassert>
#include <concepts>
#include <ranges>
#include "test_iterators.h"
template <class Iter>
constexpr void testOne() {
using Range = std::ranges::subrange<Iter>;
using SplitView = std::ranges::split_view<Range, std::ranges::single_view<int>>;
static_assert(std::ranges::common_range<SplitView>);
{
// simple test
{
int buffer[] = {0, 1, 2, -1, 4, 5, 6};
Range input(Iter{buffer}, Iter{buffer + 7});
SplitView sv(input, -1);
auto b = sv.begin(), e = sv.end();
assert(b == b);
assert(!(b != b));
assert(e == e);
assert(!(e != e));
assert(!(b == e));
assert(b != e);
std::advance(b, 2);
assert(b == b);
assert(!(b != b));
assert(e == e);
assert(!(e != e));
assert(b == e);
assert(!(b != e));
}
// iterator at trailing empty position should not equal to end
{
int buffer[] = {0, 1, 2, -1};
Range input(Iter{buffer}, Iter{buffer + 4});
SplitView sv(input, -1);
auto b = sv.begin(), e = sv.end();
++b; // cur points to end but trailing_empty is true
assert(b != e);
assert(!(b == e));
++b;
assert(b == e);
assert(!(b != e));
}
// Default-constructed iterators compare equal.
{
int buffer[] = {0, 1, 2, -1, 4, 5, 6};
Range input(Iter{buffer}, Iter{buffer + 7});
std::ranges::split_view sv(buffer, -1);
using SplitIter = decltype(sv.begin());
SplitIter i1, i2;
assert(i1 == i2);
assert(!(i1 != i2));
}
}
}
constexpr bool test() {
testOne<forward_iterator<int*>>();
testOne<bidirectional_iterator<int*>>();
testOne<random_access_iterator<int*>>();
testOne<contiguous_iterator<int*>>();
testOne<int*>();
return true;
}
int main(int, char**) {
test();
static_assert(test());
return 0;
}
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