1 // -*- C++ -*-
2 //===----------------------------------------------------------------------===//
3 //
4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5 // See https://llvm.org/LICENSE.txt for license information.
6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #ifndef _LIBCPP___RANGES_ENABLE_BORROWED_RANGE_H
11 #define _LIBCPP___RANGES_ENABLE_BORROWED_RANGE_H
12 
13 // These customization variables are used in <span> and <string_view>. The
14 // separate header is used to avoid including the entire <ranges> header in
15 // <span> and <string_view>.
16 
17 #include <__config>
18 
19 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
20 #  pragma GCC system_header
21 #endif
22 
23 _LIBCPP_BEGIN_NAMESPACE_STD
24 
25 #if _LIBCPP_STD_VER > 17
26 
27 namespace ranges {
28 
29 // [range.range], ranges
30 
31 template <class>
32 inline constexpr bool enable_borrowed_range = false;
33 
34 } // namespace ranges
35 
36 #endif // _LIBCPP_STD_VER > 17
37 
38 _LIBCPP_END_NAMESPACE_STD
39 
40 #endif // _LIBCPP___RANGES_ENABLE_BORROWED_RANGE_H
41