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_FORMATTER_H
11#define _LIBCPP___FORMAT_FORMATTER_H
12
13#include <__config>
14#include <__fwd/format.h>
15
16#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
17# pragma GCC system_header
18#endif
19
20_LIBCPP_BEGIN_NAMESPACE_STD
21
22#if _LIBCPP_STD_VER >= 20
23
24/// The default formatter template.
25///
26/// [format.formatter.spec]/5
27/// If F is a disabled specialization of formatter, these values are false:
28/// - is_default_constructible_v<F>,
29/// - is_copy_constructible_v<F>,
30/// - is_move_constructible_v<F>,
31/// - is_copy_assignable<F>, and
32/// - is_move_assignable<F>.
33template <class _Tp, class _CharT>
34struct _LIBCPP_TEMPLATE_VIS formatter {
35 formatter() = delete;
36 formatter(const formatter&) = delete;
37 formatter& operator=(const formatter&) = delete;
38};
39
40# if _LIBCPP_STD_VER >= 23
41
42template <class _Tp>
43_LIBCPP_HIDE_FROM_ABI constexpr void __set_debug_format(_Tp& __formatter) {
44 if constexpr (requires { __formatter.set_debug_format(); })
45 __formatter.set_debug_format();
46}
47
48# endif // _LIBCPP_STD_VER >= 23
49#endif // _LIBCPP_STD_VER >= 20
50
51_LIBCPP_END_NAMESPACE_STD
52
53#endif // _LIBCPP___FORMAT_FORMATTER_H
54