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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-exception7//8//===----------------------------------------------------------------------===//9 10#ifndef _LIBCPP___FORMAT_CONTAINER_ADAPTOR_H11#define _LIBCPP___FORMAT_CONTAINER_ADAPTOR_H12 13#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)14# pragma GCC system_header15#endif16 17#include <__config>18#include <__format/concepts.h>19#include <__format/formatter.h>20#include <__format/range_default_formatter.h>21#include <__fwd/queue.h>22#include <__fwd/stack.h>23#include <__ranges/ref_view.h>24#include <__type_traits/is_const.h>25#include <__type_traits/maybe_const.h>26 27_LIBCPP_BEGIN_NAMESPACE_STD28 29#if _LIBCPP_STD_VER >= 2330 31// [container.adaptors.format] only specifies the library should provide the32// formatter specializations, not which header should provide them.33// Since <format> includes a lot of headers, add these headers here instead of34// adding more dependencies like, locale, optinal, string, tuple, etc. to the35// adaptor headers. To use the format functions users already include <format>.36 37template <class _Adaptor, class _CharT>38struct __formatter_container_adaptor {39private:40 using __maybe_const_container _LIBCPP_NODEBUG = __fmt_maybe_const<typename _Adaptor::container_type, _CharT>;41 using __maybe_const_adaptor _LIBCPP_NODEBUG = __maybe_const<is_const_v<__maybe_const_container>, _Adaptor>;42 formatter<ranges::ref_view<__maybe_const_container>, _CharT> __underlying_;43 44public:45 template <class _ParseContext>46 _LIBCPP_HIDE_FROM_ABI constexpr typename _ParseContext::iterator parse(_ParseContext& __ctx) {47 return __underlying_.parse(__ctx);48 }49 50 template <class _FormatContext>51 _LIBCPP_HIDE_FROM_ABI typename _FormatContext::iterator52 format(__maybe_const_adaptor& __adaptor, _FormatContext& __ctx) const {53 return __underlying_.format(__adaptor.__get_container(), __ctx);54 }55};56 57template <class _CharT, class _Tp, formattable<_CharT> _Container>58struct formatter<queue<_Tp, _Container>, _CharT>59 : public __formatter_container_adaptor<queue<_Tp, _Container>, _CharT> {};60 61template <class _CharT, class _Tp, class _Container, class _Compare>62struct formatter<priority_queue<_Tp, _Container, _Compare>, _CharT>63 : public __formatter_container_adaptor<priority_queue<_Tp, _Container, _Compare>, _CharT> {};64 65template <class _CharT, class _Tp, formattable<_CharT> _Container>66struct formatter<stack<_Tp, _Container>, _CharT>67 : public __formatter_container_adaptor<stack<_Tp, _Container>, _CharT> {};68 69#endif // _LIBCPP_STD_VER >= 2370 71_LIBCPP_END_NAMESPACE_STD72 73#endif // _LIBCPP___FORMAT_CONTAINER_ADAPTOR_H74