real::detail::byte_ctx Namespace Reference

The context bits both lazy DFAs keep for the byte beside a position (before it forward, after it backward): a newline, an ASCII word byte, or – under word_quit only – a non-ASCII byte, which sets both bits at once since no ASCII byte does. More...

Functions
constexpr bool	is_newline (std::uint8_t ctx)
	Whether context ctx says its byte is a newline.
constexpr bool	is_word (std::uint8_t ctx)
	Whether context ctx says its byte is an ASCII word byte.
constexpr bool	is_nonascii (std::uint8_t ctx)
	Whether context ctx says its byte is not ASCII.
constexpr std::uint8_t	of (std::uint8_t b, bool cr)
	The context bits of byte b.

Variables
constexpr std::uint8_t	newline {2}
	The byte is a newline.
constexpr std::uint8_t	word {4}
	The byte is an ASCII word byte.
constexpr std::uint8_t	nonascii {6}
	The byte is not ASCII (word_quit only).

Detailed Description

The context bits both lazy DFAs keep for the byte beside a position (before it forward, after it backward): a newline, an ASCII word byte, or – under word_quit only – a non-ASCII byte, which sets both bits at once since no ASCII byte does.

Function Documentation

is_newline()

constexpr bool real::detail::byte_ctx::is_newline ( std::uint8_t  ctx )

constexpr

Whether context ctx says its byte is a newline.

Parameters

[in]

ctx

Context bits.

Returns

True for a newline; false for a non-ASCII byte, which also carries the newline bit.

is_nonascii()

constexpr bool real::detail::byte_ctx::is_nonascii ( std::uint8_t  ctx )

constexpr

Whether context ctx says its byte is not ASCII.

Parameters

[in]

ctx

Context bits.

Returns

True for a non-ASCII byte under word_quit.

is_word()

constexpr bool real::detail::byte_ctx::is_word ( std::uint8_t  ctx )

constexpr

Whether context ctx says its byte is an ASCII word byte.

Parameters

[in]

ctx

Context bits.

Returns

True for an ASCII word byte.

of()

constexpr std::uint8_t real::detail::byte_ctx::of ( std::uint8_t  b, bool  cr  )

constexpr

The context bits of byte b.

Parameters

[in]	b	The byte.
[in]	cr	The program's line assertions are ECMAScript's, which end a line at \r too.

Returns

Its context bits.