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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
// UNSUPPORTED: libcpp-no-concepts
// UNSUPPORTED: gcc-10
// constexpr counted_iterator() requires default_initializable<I> = default;
// constexpr counted_iterator(I x, iter_difference_t<I> n);
// template<class I2>
// requires convertible_to<const I2&, I>
// constexpr counted_iterator(const counted_iterator<I2>& x);
#include <iterator>
#include "test_macros.h"
#include "test_iterators.h"
struct InputOrOutputArchetype {
using difference_type = int;
int *ptr;
constexpr int operator*() { return *ptr; }
constexpr void operator++(int) { ++ptr; }
constexpr InputOrOutputArchetype& operator++() { ++ptr; return *this; }
};
constexpr bool test() {
int buffer[8] = {1, 2, 3, 4, 5, 6, 7, 8};
{
std::counted_iterator iter(cpp20_input_iterator<int*>{buffer}, 8);
assert(iter.base().base() == buffer);
assert(iter.count() == 8);
}
{
std::counted_iterator iter(forward_iterator<int*>{buffer}, 8);
assert(iter.base() == forward_iterator<int*>{buffer});
assert(iter.count() == 8);
}
{
std::counted_iterator iter(contiguous_iterator<int*>{buffer}, 8);
assert(iter.base() == contiguous_iterator<int*>{buffer});
assert(iter.count() == 8);
}
{
std::counted_iterator iter(InputOrOutputArchetype{buffer}, 8);
assert(iter.base().ptr == buffer);
assert(iter.count() == 8);
}
{
const std::counted_iterator iter(cpp20_input_iterator<int*>{buffer}, 8);
assert(iter.base().base() == buffer);
assert(iter.count() == 8);
}
{
const std::counted_iterator iter(forward_iterator<int*>{buffer}, 7);
assert(iter.base() == forward_iterator<int*>{buffer});
assert(iter.count() == 7);
}
{
const std::counted_iterator iter(contiguous_iterator<int*>{buffer}, 6);
assert(iter.base() == contiguous_iterator<int*>{buffer});
assert(iter.count() == 6);
}
{
const std::counted_iterator iter(InputOrOutputArchetype{buffer}, 8);
assert(iter.base().ptr == buffer);
assert(iter.count() == 8);
}
return true;
}
int main(int, char**) {
test();
static_assert(test());
return 0;
}
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