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>. 33 template <class _Tp, class _CharT> 34 struct _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 42 template <class _Tp> __set_debug_format(_Tp & __formatter)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