extended_grapheme_cluster_table.h | Explore in Territory

// -*- C++ -*-
//===----------------------------------------------------------------------===//
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//===----------------------------------------------------------------------===//

// WARNING, this entire header is generated by
// utils/generate_extended_grapheme_cluster_table.py
// DO NOT MODIFY!

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#ifndef _LIBCPP___FORMAT_EXTENDED_GRAPHEME_CLUSTER_TABLE_H
#define _LIBCPP___FORMAT_EXTENDED_GRAPHEME_CLUSTER_TABLE_H

#include <__algorithm/ranges_upper_bound.h>
#include <__config>
#include <__iterator/access.h>
#include <cstddef>
#include <cstdint>

#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
#  pragma GCC system_header
#endif

_LIBCPP_BEGIN_NAMESPACE_STD

#if _LIBCPP_STD_VER >= 20

namespace __extended_grapheme_custer_property_boundary {

enum class __property : uint8_t { … };

/// The entries of the extended grapheme cluster bondary property table.
///
/// The data is generated from
/// - https://www.unicode.org/Public/UCD/latest/ucd/auxiliary/GraphemeBreakProperty.txt
/// - https://www.unicode.org/Public/UCD/latest/ucd/emoji/emoji-data.txt
///
/// The data has 3 values
/// - bits [0, 3] The property. One of the values generated from the datafiles
///   of \ref __property
/// - bits [4, 10] The size of the range.
/// - bits [11, 31] The lower bound code point of the range. The upper bound of
///   the range is lower bound + size.
///
/// The 7 bits for the size allow a maximum range of 128 elements. Some ranges
/// in the Unicode tables are larger. They are stored in multiple consecutive
/// ranges in the data table. An alternative would be to store the sizes in a
/// separate 16-bit value. The original MSVC STL code had such an approach, but
/// this approach uses less space for the data and is about 4% faster in the
/// following benchmark.
/// libcxx/benchmarks/std_format_spec_string_unicode.bench.cpp
// clang-format off
_LIBCPP_HIDE_FROM_ABI inline constexpr uint32_t __entries[1496] = …;
// clang-format on

/// Returns the extended grapheme cluster bondary property of a code point.
[[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr __property __get_property(const char32_t __code_point) noexcept { … }

} // namespace __extended_grapheme_custer_property_boundary

#endif // _LIBCPP_STD_VER >= 20

_LIBCPP_END_NAMESPACE_STD

#endif // _LIBCPP___FORMAT_EXTENDED_GRAPHEME_CLUSTER_TABLE_H
chromium/third_party/libc++/src/include/__format/extended_grapheme_cluster_table.h
