a2160dd34d
- Implement https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p2474r2.html - Implement LWG3875(https://cplusplus.github.io/LWG/issue3875). Depends on D151629 Reviewed By: #libc, Mordante, philnik, var-const Differential Revision: https://reviews.llvm.org/D141699
50 lines
1.4 KiB
C++
50 lines
1.4 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, c++20
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// constexpr unreachable_sentinel_t end() const noexcept;
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// constexpr iterator end() const requires (!same_as<Bound, unreachable_sentinel_t>);
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#include <ranges>
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#include <cassert>
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#include <concepts>
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#include <iterator>
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constexpr bool test() {
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// bound
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{
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std::ranges::repeat_view<int, int> rv(0, 10);
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assert(rv.begin() + 10 == rv.end());
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std::same_as<std::ranges::iterator_t<decltype(rv)>> decltype(auto) iter = rv.end();
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static_assert(std::same_as<decltype(*iter), const int&>);
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for (const auto& i : rv) {
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assert(i == 0);
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}
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}
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// unbound
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{
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std::ranges::repeat_view<int> rv(0);
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assert(rv.begin() + 10 != rv.end());
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static_assert(std::same_as<decltype(rv.end()), std::unreachable_sentinel_t>);
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static_assert(noexcept(rv.end()));
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for (const auto& i : rv | std::views::take(10)) {
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assert(i == 0);
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}
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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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