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___FORMAT_ENABLE_INSERTABLE_H
11#define _LIBCPP___FORMAT_ENABLE_INSERTABLE_H
12
13#include <__config>
14
15#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
16#  pragma GCC system_header
17#endif
18
19_LIBCPP_BEGIN_NAMESPACE_STD
20
21#if _LIBCPP_STD_VER >= 20
22
23namespace __format {
24
25/// Opt-in to enable \ref __insertable for a \a _Container.
26template <class _Container>
27inline constexpr bool __enable_insertable = false;
28
29} // namespace __format
30
31#endif // _LIBCPP_STD_VER >= 20
32
33_LIBCPP_END_NAMESPACE_STD
34
35#endif // _LIBCPP___FORMAT_ENABLE_INSERTABLE_H