Trait rust_fsm::StateMachineImpl

pub trait StateMachineImpl {
    type Input;
    type State;
    type Output;

    const INITIAL_STATE: Self::State;

    fn transition(
        state: &Self::State, 
        input: &Self::Input
    ) -> Option<Self::State>;
    fn output(state: &Self::State, input: &Self::Input) -> Option<Self::Output>;
}

This trait is designed to describe any possible deterministic finite state machine/transducer. This is just a formal definition that may be inconvenient to be used in practical programming, but it is used throughout this library for more practical things.

Associated Types

type Input

The input alphabet.

type State

The set of possible states.

type Output

The output alphabet.

Associated Constants

const INITIAL_STATE: Self::State

The initial state of the machine.

Required methods

fn transition(state: &Self::State, input: &Self::Input) -> Option<Self::State>

The transition fuction that outputs a new state based on the current state and the provided input. Outputs None when there is no transition for a given combination of the input and the state.

fn output(state: &Self::State, input: &Self::Input) -> Option<Self::Output>

The output function that outputs some value from the output alphabet based on the current state and the given input. Outputs None when there is no output for a given combination of the input and the state.

Implementors