| //===----------------------------------------------------------------------===// |
| // |
| // 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 auto end(); |
| |
| #include <cassert> |
| #include <ranges> |
| #include <type_traits> |
| #include <utility> |
| |
| #include "test_iterators.h" |
| |
| struct View : std::ranges::view_base { |
| int* begin() const; |
| int* end() const; |
| }; |
| |
| // Test that end is not const |
| template <class T> |
| concept HasEnd = requires(T t) { t.end(); }; |
| |
| static_assert(HasEnd<std::ranges::split_view<View, View>>); |
| static_assert(!HasEnd<const std::ranges::split_view<View, View>>); |
| |
| constexpr bool test() { |
| // return iterator |
| { |
| int buffer[] = {1, 2, -1, 4, 5, 6, 5, 4, -1, 2, 1}; |
| auto inputView = std::views::all(buffer); |
| static_assert(std::ranges::common_range<decltype(inputView)>); |
| |
| std::ranges::split_view sv(buffer, -1); |
| using SplitIter = std::ranges::iterator_t<decltype(sv)>; |
| std::same_as<SplitIter> decltype(auto) sentinel = sv.end(); |
| assert(sentinel.base() == buffer + 11); |
| } |
| |
| // return sentinel |
| { |
| using Iter = int*; |
| using Sent = sentinel_wrapper<Iter>; |
| using Range = std::ranges::subrange<Iter, Sent>; |
| int buffer[] = {1, 2, -1, 4, 5, 6, 5, 4, -1, 2, 1}; |
| Range range = {buffer, Sent{buffer + 11}}; |
| static_assert(!std::ranges::common_range<Range>); |
| |
| std::ranges::split_view sv(range, -1); |
| auto sentinel = sv.end(); |
| |
| using SplitIter = std::ranges::iterator_t<decltype(sv)>; |
| static_assert(!std::same_as<decltype(sentinel), SplitIter>); |
| |
| assert(std::next(sv.begin(), 3) == sentinel); |
| } |
| |
| return true; |
| } |
| |
| int main(int, char**) { |
| test(); |
| static_assert(test()); |
| return 0; |
| } |