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_CONTAINER_ADAPTOR_H 11 #define _LIBCPP___FORMAT_CONTAINER_ADAPTOR_H 12 13 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 14 # pragma GCC system_header 15 #endif 16 17 #include <__availability> 18 #include <__config> 19 #include <__format/concepts.h> 20 #include <__format/formatter.h> 21 #include <__format/range_default_formatter.h> 22 #include <queue> 23 #include <stack> 24 25 _LIBCPP_BEGIN_NAMESPACE_STD 26 27 #if _LIBCPP_STD_VER > 20 28 29 // [container.adaptors.format] only specifies the library should provide the 30 // formatter specializations, not which header should provide them. 31 // Since <format> includes a lot of headers, add these headers here instead of 32 // adding more dependencies like, locale, optinal, string, tuple, etc. to the 33 // adaptor headers. To use the format functions users already include <format>. 34 35 template <class _Adaptor, class _CharT> 36 struct _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT __formatter_container_adaptor { 37 private: 38 using __maybe_const_adaptor = __fmt_maybe_const<_Adaptor, _CharT>; 39 formatter<typename _Adaptor::container_type, _CharT> __underlying_; 40 41 public: 42 template <class _ParseContext> parse__formatter_container_adaptor43 _LIBCPP_HIDE_FROM_ABI constexpr typename _ParseContext::iterator parse(_ParseContext& __ctx) { 44 return __underlying_.parse(__ctx); 45 } 46 47 template <class _FormatContext> 48 _LIBCPP_HIDE_FROM_ABI typename _FormatContext::iterator format__formatter_container_adaptor49 format(__maybe_const_adaptor& __adaptor, _FormatContext& __ctx) const { 50 return __underlying_.format(__adaptor.__get_container(), __ctx); 51 } 52 }; 53 54 template <class _CharT, class _Tp, formattable<_CharT> _Container> 55 struct _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT formatter<queue<_Tp, _Container>, _CharT> 56 : public __formatter_container_adaptor<queue<_Tp, _Container>, _CharT> {}; 57 58 template <class _CharT, class _Tp, class _Container, class _Compare> 59 struct _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT formatter<priority_queue<_Tp, _Container, _Compare>, _CharT> 60 : public __formatter_container_adaptor<priority_queue<_Tp, _Container, _Compare>, _CharT> {}; 61 62 template <class _CharT, class _Tp, formattable<_CharT> _Container> 63 struct _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT formatter<stack<_Tp, _Container>, _CharT> 64 : public __formatter_container_adaptor<stack<_Tp, _Container>, _CharT> {}; 65 66 #endif //_LIBCPP_STD_VER > 20 67 68 _LIBCPP_END_NAMESPACE_STD 69 70 #endif // _LIBCPP___FORMAT_CONTAINER_ADAPTOR_H 71