Trait utility_programming::Modifier

pub trait Modifier<T> {
    type Change;
    fn modify(&mut self, obj: &mut T) -> Self::Change;
    fn undo(&mut self, change: &Self::Change, obj: &mut T);
    fn redo(&mut self, change: &Self::Change, obj: &mut T);
}

Modifies objects in a way that can be reversed.

Associated Types

type Change

The change applied to an object.

Required Methods

fn modify(&mut self, obj: &mut T) -> Self::Change

Modify an object and return the change.

This might be indeterministic.

fn undo(&mut self, change: &Self::Change, obj: &mut T)

Undo change made to an object.

Required to be deterministic.

fn redo(&mut self, change: &Self::Change, obj: &mut T)

Redo change made to an object.

Required to be deterministic.

Implementations on Foreign Types

impl<T, U: Modifier<T>> Modifier<T> for Vec<U>

type Change = (usize, U::Change)

fn modify(&mut self, obj: &mut T) -> Self::Change

fn undo(&mut self, change: &Self::Change, obj: &mut T)

fn redo(&mut self, change: &Self::Change, obj: &mut T)

Implementors

• impl<T, M, U> Modifier<T> for ModifyOptimizer<M, U> where
    M: Modifier<T>,
    U: Utility<T>,
    M::Change: Clone,  type Change = Vec<M::Change>;