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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-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 <__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_STD |
| 28 | |
| 29 | #if _LIBCPP_STD_VER >= 23 |
| 30 | |
| 31 | // [container.adaptors.format] only specifies the library should provide the |
| 32 | // formatter specializations, not which header should provide them. |
| 33 | // Since <format> includes a lot of headers, add these headers here instead of |
| 34 | // adding more dependencies like, locale, optinal, string, tuple, etc. to the |
| 35 | // adaptor headers. To use the format functions users already include <format>. |
| 36 | |
| 37 | template <class _Adaptor, class _CharT> |
| 38 | struct __formatter_container_adaptor { |
| 39 | private: |
| 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 | |
| 44 | public: |
| 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::iterator |
| 52 | format(__maybe_const_adaptor& __adaptor, _FormatContext& __ctx) const { |
| 53 | return __underlying_.format(__adaptor.__get_container(), __ctx); |
| 54 | } |
| 55 | }; |
| 56 | |
| 57 | template <class _CharT, class _Tp, formattable<_CharT> _Container> |
| 58 | struct formatter<queue<_Tp, _Container>, _CharT> |
| 59 | : public __formatter_container_adaptor<queue<_Tp, _Container>, _CharT> {}; |
| 60 | |
| 61 | template <class _CharT, class _Tp, class _Container, class _Compare> |
| 62 | struct formatter<priority_queue<_Tp, _Container, _Compare>, _CharT> |
| 63 | : public __formatter_container_adaptor<priority_queue<_Tp, _Container, _Compare>, _CharT> {}; |
| 64 | |
| 65 | template <class _CharT, class _Tp, formattable<_CharT> _Container> |
| 66 | struct formatter<stack<_Tp, _Container>, _CharT> |
| 67 | : public __formatter_container_adaptor<stack<_Tp, _Container>, _CharT> {}; |
| 68 | |
| 69 | #endif // _LIBCPP_STD_VER >= 23 |
| 70 | |
| 71 | _LIBCPP_END_NAMESPACE_STD |
| 72 | |
| 73 | #endif // _LIBCPP___FORMAT_CONTAINER_ADAPTOR_H |
| 74 |
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