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