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-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 // UNSUPPORTED: c++03, c++11, c++14, c++17
10 
11 // <filesystem>
12 
13 // template <>
14 // inline constexpr bool ranges::enable_borrowed_range<filesystem::directory_iterator> = true;
15 // template <>
16 // inline constexpr bool ranges::enable_borrowed_range<filesystem::recursive_directory_iterator> = true;
17 
18 #include <filesystem>
19 #include <ranges>
20 
21 template<class Range>
22 void test() {
23   static_assert(std::ranges::enable_borrowed_range<Range>);
24   static_assert(!std::ranges::enable_borrowed_range<Range&>);
25   static_assert(!std::ranges::enable_borrowed_range<const Range>);
26 }
27 
28 void test() {
29   test<std::filesystem::directory_iterator>();
30   test<std::filesystem::recursive_directory_iterator>();
31 }
32