| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| |
| // <iterator> |
| // |
| // constexpr istream_iterator(default_sentinel_t); // since C++20 |
| |
| #include <iterator> |
| #include <cassert> |
| |
| int main(int, char**) { |
| using T = std::istream_iterator<int>; |
| |
| { |
| T it(std::default_sentinel); |
| assert(it == T()); |
| } |
| |
| { |
| T it = std::default_sentinel; |
| assert(it == T()); |
| } |
| |
| { |
| constexpr T it(std::default_sentinel); |
| (void)it; |
| } |
| |
| return 0; |
| } |