real::detail::char_class Struct Reference

A set of byte values (0–255) as a 256-bit bitmap. More...

#include <charclass.hpp>

Public Member Functions
constexpr void	set (std::uint8_t byte)
	Adds byte byte to the set.
constexpr void	set_range (std::uint8_t low, std::uint8_t high)
	Adds the inclusive byte range [low, high] to the set.
constexpr void	merge (const char_class &other)
	Unions other into this set.
constexpr void	invert_ascii ()
	Complements the ASCII half (bytes 0–127) only.
constexpr void	invert ()
	Full 256-bit complement (binary mode: raw bytes, no UTF-8).
constexpr bool	test (std::uint8_t byte) const
	Tests membership of byte byte.
constexpr bool	empty () const
	Reports whether the set has no members.
constexpr bool	operator== (const char_class &) const =default
	Equality: the two bitmaps accept exactly the same byte set.

Public Attributes
std::array< std::uint64_t, 4 >	bits {}
	Bitmap; bit byte is byte byte's membership.

Detailed Description

A set of byte values (0–255) as a 256-bit bitmap.

Membership, insertion and complement are all O(1) or O(256) and constexpr. All bit manipulation uses unsigned operands (MISRA forbids signed bitwise).

Member Function Documentation

empty()

constexpr bool real::detail::char_class::empty ( ) const

inlineconstexpr

Reports whether the set has no members.

Returns

true if the set is empty.

invert_ascii()

constexpr void real::detail::char_class::invert_ascii ( )

inlineconstexpr

Complements the ASCII half (bytes 0–127) only.

Bytes >= 0x80 are left untouched; the compiler handles non-ASCII codepoints as explicit UTF-8 multi-byte alternatives instead.

merge()

constexpr void real::detail::char_class::merge ( const char_class &  other )

inlineconstexpr

Unions other into this set.

Parameters

[in]

other

The set whose members are added to this one.

operator==()

constexpr bool real::detail::char_class::operator== ( const char_class &  ) const

constexprdefault

Equality: the two bitmaps accept exactly the same byte set.

Returns

Whether every one of the 256 bits agrees.

set()

constexpr void real::detail::char_class::set ( std::uint8_t  byte )

inlineconstexpr

Adds byte byte to the set.

Parameters

[in]

byte

The byte to insert.

set_range()

constexpr void real::detail::char_class::set_range ( std::uint8_t  low, std::uint8_t  high  )

inlineconstexpr

Adds the inclusive byte range [low, high] to the set.

Parameters

[in]	low	First byte of the range.
[in]	high	Last byte of the range (inclusive).

test()

constexpr bool real::detail::char_class::test ( std::uint8_t  byte ) const

inlineconstexpr

Tests membership of byte byte.

Parameters

[in]

byte

The byte to test.

Returns

true if byte is in the set.

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The documentation for this struct was generated from the following file:

• include/real/core/charclass.hpp