Trait TryState 

pub trait TryState {
    type Error;

    // Provided methods
    fn try_entry(&mut self) -> Result<(), Self::Error> { ... }
    fn try_execute(&mut self) -> Result<(), Self::Error> { ... }
    fn try_exit(&mut self) -> Result<(), Self::Error> { ... }
}

Trait that must be implemented by all states that are used by the fallible state machine.

Behaves similar to the normal State trait, but requires the user to specify an Error type. If this error is returned, the state machine immediately transitions into the error state.

Required Associated Types

type Error

Provided Methods

fn try_entry(&mut self) -> Result<(), Self::Error>

Implement any behavior that hast to be executed when entering the state. Return Ok(()) if no error occurred or Err(Self::Error) if something happened.

    fn try_entry(&mut self) -> Result<(), Self::Error> {
        println!("Called right after being transitioned into");
        return Ok(());
    }

fn try_execute(&mut self) -> Result<(), Self::Error>

Implement any behavior that hast to be stepping. Return Ok(()) if no error occurred or Err(Self::Error) if something happened.

    fn try_entry(&mut self) -> Result<(), Self::Error> {
        println!("Called during every step");
        return Ok(());
    }

fn try_exit(&mut self) -> Result<(), Self::Error>

Implement any behavior that hast to be executed when exiting the state. Return Ok(()) if no error occurred or Err(Self::Error) if something happened.

    fn try_entry(&mut self) -> Result<(), Self::Error> {
        println!("Called before transitioning to another state");
        return Ok(());
    }

Implementors