Trait Evolution 

pub trait Evolution<I>
where
    I: Copy,
{
    // Required methods
    fn value(&self) -> I;
    fn old_value(&self) -> I;

    // Provided methods
    fn delta(&self) -> <I as Sub>::Output
       where I: Sub { ... }
    fn evolution(&self) -> PreviousValue<I> { ... }
}

Required Methods

fn value(&self) -> I

The current state right now

fn old_value(&self) -> I

The state in the old frame

Provided Methods

fn delta(&self) -> <I as Sub>::Output

where I: Sub,

value() - old_value()

fn evolution(&self) -> PreviousValue<I>

Implementors

impl Evolution<ButtonState> for KeyCode

impl Evolution<ButtonState> for ButtonStateEvolution

impl<T> Evolution<T> for PreviousValue<T>

where T: Copy,