50 lines · cpp
1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9// UNSUPPORTED: no-localization10// UNSUPPORTED: c++03, c++11, c++14, c++1711 12// constexpr default_sentinel_t end() const noexcept;13 14#include <cassert>15#include <ranges>16#include <sstream>17 18#include "test_macros.h"19#include "utils.h"20 21template <class T>22concept NoexceptEnd =23 requires(T t) {24 { t.end() } noexcept;25 };26 27static_assert(NoexceptEnd<std::ranges::istream_view<int>>);28static_assert(NoexceptEnd<const std::ranges::istream_view<int>>);29 30#ifndef TEST_HAS_NO_WIDE_CHARACTERS31static_assert(NoexceptEnd<std::ranges::wistream_view<int>>);32static_assert(NoexceptEnd<const std::ranges::wistream_view<int>>);33#endif34 35template <class CharT>36void test() {37 auto iss = make_string_stream<CharT>("12");38 std::ranges::basic_istream_view<int, CharT> isv{iss};39 [[maybe_unused]] std::same_as<std::default_sentinel_t> auto sent = isv.end();40}41 42int main(int, char**) {43 test<char>();44#ifndef TEST_HAS_NO_WIDE_CHARACTERS45 test<wchar_t>();46#endif47 48 return 0;49}50