1349cc55cSDimitry Andric // -*- C++ -*- 2349cc55cSDimitry Andric //===----------------------------------------------------------------------===// 3349cc55cSDimitry Andric // 4349cc55cSDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5349cc55cSDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 6349cc55cSDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7349cc55cSDimitry Andric // 8349cc55cSDimitry Andric //===----------------------------------------------------------------------===// 9349cc55cSDimitry Andric 10349cc55cSDimitry Andric #ifndef _LIBCPP___FORMAT_FORMAT_ARGS_H 11349cc55cSDimitry Andric #define _LIBCPP___FORMAT_FORMAT_ARGS_H 12349cc55cSDimitry Andric 13349cc55cSDimitry Andric #include <__config> 1481ad6265SDimitry Andric #include <__format/format_arg.h> 1581ad6265SDimitry Andric #include <__format/format_arg_store.h> 16*0fca6ea1SDimitry Andric #include <__fwd/format.h> 17349cc55cSDimitry Andric #include <cstddef> 1881ad6265SDimitry Andric #include <cstdint> 19349cc55cSDimitry Andric 20349cc55cSDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 21349cc55cSDimitry Andric # pragma GCC system_header 22349cc55cSDimitry Andric #endif 23349cc55cSDimitry Andric 24349cc55cSDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD 25349cc55cSDimitry Andric 2606c3fb27SDimitry Andric #if _LIBCPP_STD_VER >= 20 27349cc55cSDimitry Andric 28349cc55cSDimitry Andric template <class _Context> 2906c3fb27SDimitry Andric class _LIBCPP_TEMPLATE_VIS basic_format_args { 30349cc55cSDimitry Andric public: 31349cc55cSDimitry Andric template <class... _Args> 3281ad6265SDimitry Andric _LIBCPP_HIDE_FROM_ABI basic_format_args(const __format_arg_store<_Context, _Args...>& __store) noexcept 3381ad6265SDimitry Andric : __size_(sizeof...(_Args)) { 3481ad6265SDimitry Andric if constexpr (sizeof...(_Args) != 0) { 3581ad6265SDimitry Andric if constexpr (__format::__use_packed_format_arg_store(sizeof...(_Args))) { 3681ad6265SDimitry Andric __values_ = __store.__storage.__values_; 3781ad6265SDimitry Andric __types_ = __store.__storage.__types_; 3881ad6265SDimitry Andric } else 3981ad6265SDimitry Andric __args_ = __store.__storage.__args_; 4081ad6265SDimitry Andric } 4181ad6265SDimitry Andric } 42349cc55cSDimitry Andric 43cb14a3feSDimitry Andric _LIBCPP_HIDE_FROM_ABI basic_format_arg<_Context> get(size_t __id) const noexcept { 4481ad6265SDimitry Andric if (__id >= __size_) 4581ad6265SDimitry Andric return basic_format_arg<_Context>{}; 4681ad6265SDimitry Andric 4781ad6265SDimitry Andric if (__format::__use_packed_format_arg_store(__size_)) 4881ad6265SDimitry Andric return basic_format_arg<_Context>{__format::__get_packed_type(__types_, __id), __values_[__id]}; 4981ad6265SDimitry Andric 5081ad6265SDimitry Andric return __args_[__id]; 51349cc55cSDimitry Andric } 52349cc55cSDimitry Andric 53349cc55cSDimitry Andric _LIBCPP_HIDE_FROM_ABI size_t __size() const noexcept { return __size_; } 54349cc55cSDimitry Andric 55349cc55cSDimitry Andric private: 56349cc55cSDimitry Andric size_t __size_{0}; 5781ad6265SDimitry Andric // [format.args]/5 5881ad6265SDimitry Andric // [Note 1: Implementations are encouraged to optimize the representation of 5981ad6265SDimitry Andric // basic_format_args for small number of formatting arguments by storing 6081ad6265SDimitry Andric // indices of type alternatives separately from values and packing the 6181ad6265SDimitry Andric // former. - end note] 6281ad6265SDimitry Andric union { 6381ad6265SDimitry Andric struct { 6481ad6265SDimitry Andric const __basic_format_arg_value<_Context>* __values_; 6581ad6265SDimitry Andric uint64_t __types_; 66349cc55cSDimitry Andric }; 6781ad6265SDimitry Andric const basic_format_arg<_Context>* __args_; 6881ad6265SDimitry Andric }; 6981ad6265SDimitry Andric }; 70349cc55cSDimitry Andric 7106c3fb27SDimitry Andric template <class _Context, class... _Args> 7206c3fb27SDimitry Andric basic_format_args(__format_arg_store<_Context, _Args...>) -> basic_format_args<_Context>; 7306c3fb27SDimitry Andric 7406c3fb27SDimitry Andric #endif //_LIBCPP_STD_VER >= 20 75349cc55cSDimitry Andric 76349cc55cSDimitry Andric _LIBCPP_END_NAMESPACE_STD 77349cc55cSDimitry Andric 78349cc55cSDimitry Andric #endif // _LIBCPP___FORMAT_FORMAT_ARGS_H 79