Trait aho_corasick::Transitions [−] [src]

pub trait Transitions {
    fn new(depth: u32) -> Self;
    fn goto(&self, alpha: u8) -> StateIdx;
    fn set_goto(&mut self, alpha: u8, si: StateIdx);
    fn heap_bytes(&self) -> usize;
}

An abstraction over state transition strategies.

This is an attempt to let the caller choose the space/time trade offs used for state transitions.

(It's possible that this interface is merely good enough for just the two implementations in this crate.)

Required Methods

fn new(depth: u32) -> Self

Return a new state at the given depth.

fn goto(&self, alpha: u8) -> StateIdx

Return the next state index given the next character.

fn set_goto(&mut self, alpha: u8, si: StateIdx)

Set the next state index for the character given.

fn heap_bytes(&self) -> usize

The memory use in bytes (on the heap) of this set of transitions.

Implementors