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
24struct __disabled_formatter {
25 __disabled_formatter() = delete;
26 __disabled_formatter(const __disabled_formatter&) = delete;
27 __disabled_formatter& operator=(const __disabled_formatter&) = delete;
28};
29
30/// The default formatter template.
31///
32/// [format.formatter.spec]/5
33/// If F is a disabled specialization of formatter, these values are false:
34/// - is_default_constructible_v<F>,
35/// - is_copy_constructible_v<F>,
36/// - is_move_constructible_v<F>,
37/// - is_copy_assignable_v<F>, and
38/// - is_move_assignable_v<F>.
39template <class _Tp, class _CharT>
40struct formatter : __disabled_formatter {};
41
42# if _LIBCPP_STD_VER >= 23
43
44template <class _Tp>
45constexpr bool enable_nonlocking_formatter_optimization = false;
46
47template <class _Tp>
48_LIBCPP_HIDE_FROM_ABI constexpr void __set_debug_format(_Tp& __formatter) {
49 if constexpr (requires { __formatter.set_debug_format(); })
50 __formatter.set_debug_format();
51}
52
53# endif // _LIBCPP_STD_VER >= 23
54#endif // _LIBCPP_STD_VER >= 20
55
56_LIBCPP_END_NAMESPACE_STD
57
58#endif // _LIBCPP___FORMAT_FORMATTER_H
59