Struct ScanCache 

pub struct ScanCache { /* private fields */ }

Per-lex-session scratch for the Lazy fast engine’s lazy DFA, threaded through LexerState so the hot scan reuses a cache instead of acquiring a pooled one per token (the pool exists for &self thread-safe access; a &mut-threaded cache is cheaper on the single-threaded lex path — worth ~3-4% of parse). Keyed by DFA identity because a contextual lexer’s per-state lexers each have their own DFA and a lazy Cache is valid only for the DFA that built it. A no-op for the Meta/Dense engines. Empty until the first Lazy scan; a fresh one costs nothing.

Trait Implementations

impl Clone for ScanCache

fn clone(&self) -> ScanCache

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ScanCache

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for ScanCache

fn default() -> ScanCache

Returns the “default value” for a type.