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>. 34 template <class _Tp, class _CharT> 35 struct _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 43 template <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