a2b3ab8f77
- implement `std::ranges::split_view` (last c++20 view) - Work in process on testing iterator/sentinel, but since we are getting closer to the deadline, I'd like to send the review early Differential Revision: https://reviews.llvm.org/D142063
71 lines
1.9 KiB
C++
71 lines
1.9 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++03, c++11, c++14, c++17
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// constexpr auto end();
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#include <cassert>
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#include <ranges>
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#include <type_traits>
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#include <utility>
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#include "test_iterators.h"
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struct View : std::ranges::view_base {
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int* begin() const;
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int* end() const;
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};
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// Test that end is not const
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template <class T>
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concept HasEnd = requires(T t) { t.end(); };
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static_assert(HasEnd<std::ranges::split_view<View, View>>);
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static_assert(!HasEnd<const std::ranges::split_view<View, View>>);
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constexpr bool test() {
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// return iterator
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{
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int buffer[] = {1, 2, -1, 4, 5, 6, 5, 4, -1, 2, 1};
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auto inputView = std::views::all(buffer);
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static_assert(std::ranges::common_range<decltype(inputView)>);
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std::ranges::split_view sv(buffer, -1);
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using SplitIter = std::ranges::iterator_t<decltype(sv)>;
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std::same_as<SplitIter> decltype(auto) sentinel = sv.end();
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assert(sentinel.base() == buffer + 11);
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}
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// return sentinel
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{
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using Iter = int*;
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using Sent = sentinel_wrapper<Iter>;
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using Range = std::ranges::subrange<Iter, Sent>;
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int buffer[] = {1, 2, -1, 4, 5, 6, 5, 4, -1, 2, 1};
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Range range = {buffer, Sent{buffer + 11}};
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static_assert(!std::ranges::common_range<Range>);
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std::ranges::split_view sv(range, -1);
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auto sentinel = sv.end();
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using SplitIter = std::ranges::iterator_t<decltype(sv)>;
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static_assert(!std::same_as<decltype(sentinel), SplitIter>);
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assert(std::next(sv.begin(), 3) == sentinel);
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}
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return true;
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}
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int main(int, char**) {
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test();
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static_assert(test());
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return 0;
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}
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