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 <__availability>
14#include <__config>
15#include <__format/format_fwd.h>
16
17#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
18#  pragma GCC system_header
19#endif
20
21_LIBCPP_BEGIN_NAMESPACE_STD
22
23#if _LIBCPP_STD_VER >= 20
24
25/// The default formatter template.
26///
27/// [format.formatter.spec]/5
28/// If F is a disabled specialization of formatter, these values are false:
29/// - is_default_constructible_v<F>,
30/// - is_copy_constructible_v<F>,
31/// - is_move_constructible_v<F>,
32/// - is_copy_assignable<F>, and
33/// - is_move_assignable<F>.
34template <class _Tp, class _CharT>
35struct _LIBCPP_TEMPLATE_VIS formatter {
36  formatter()                            = delete;
37  formatter(const formatter&)            = delete;
38  formatter& operator=(const formatter&) = delete;
39};
40
41#  if _LIBCPP_STD_VER >= 23
42
43template <class _Tp>
44_LIBCPP_HIDE_FROM_ABI constexpr void __set_debug_format(_Tp& __formatter) {
45  if constexpr (requires { __formatter.set_debug_format(); })
46    __formatter.set_debug_format();
47}
48
49#  endif // _LIBCPP_STD_VER >= 23
50#endif   // _LIBCPP_STD_VER >= 20
51
52_LIBCPP_END_NAMESPACE_STD
53
54#endif // _LIBCPP___FORMAT_FORMATTER_H
55