| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| |
| // constexpr range_reference_t<V> operator*() const; |
| |
| #include <ranges> |
| |
| #include <array> |
| #include <cassert> |
| #include <concepts> |
| #include <cstddef> |
| #include <utility> |
| #include "test_iterators.h" |
| #include "test_macros.h" |
| #include "../types.h" |
| |
| template <class Iterator, class ValueType = int, class Sentinel = sentinel_wrapper<Iterator>> |
| constexpr void test() { |
| using View = minimal_view<Iterator, Sentinel>; |
| using FilterView = std::ranges::filter_view<View, AlwaysTrue>; |
| using FilterIterator = std::ranges::iterator_t<FilterView>; |
| |
| auto make_filter_view = [](auto begin, auto end, auto pred) { |
| View view{Iterator(begin), Sentinel(Iterator(end))}; |
| return FilterView(std::move(view), pred); |
| }; |
| |
| std::array array{0, 1, 2, 3, 4, 5, 6, 7, 8, 9}; |
| FilterView view = make_filter_view(array.begin(), array.end(), AlwaysTrue{}); |
| |
| for (std::size_t n = 0; n != array.size(); ++n) { |
| FilterIterator const iter(view, Iterator(array.begin() + n)); |
| ValueType& result = *iter; |
| ASSERT_SAME_TYPE(ValueType&, decltype(*iter)); |
| assert(&result == array.begin() + n); |
| } |
| } |
| |
| constexpr bool tests() { |
| test<cpp17_input_iterator<int*>>(); |
| test<cpp20_input_iterator<int*>>(); |
| test<forward_iterator<int*>>(); |
| test<bidirectional_iterator<int*>>(); |
| test<random_access_iterator<int*>>(); |
| test<contiguous_iterator<int*>>(); |
| test<int*>(); |
| |
| test<cpp17_input_iterator<int const*>, int const>(); |
| test<cpp20_input_iterator<int const*>, int const>(); |
| test<forward_iterator<int const*>, int const>(); |
| test<bidirectional_iterator<int const*>, int const>(); |
| test<random_access_iterator<int const*>, int const>(); |
| test<contiguous_iterator<int const*>, int const>(); |
| test<int const*, int const>(); |
| return true; |
| } |
| |
| int main(int, char**) { |
| tests(); |
| static_assert(tests()); |
| return 0; |
| } |