Struct undo::record::Checkpoint

pub struct Checkpoint<'a, A, S> { /* private fields */ }

Wraps a record and gives it checkpoint functionality.

Implementations

impl<A, S> Checkpoint<'_, A, S>

pub fn queue(&mut self) -> Queue<'_, A, S>

Returns a queue.

pub fn checkpoint(&mut self) -> Checkpoint<'_, A, S>

Returns a checkpoint.

impl<A: Action, S: Slot> Checkpoint<'_, A, S>

pub fn apply(&mut self, target: &mut A::Target, action: A) -> A::Output

Calls the apply method.

pub fn undo(&mut self, target: &mut A::Target) -> Option<A::Output>

Calls the undo method.

pub fn redo(&mut self, target: &mut A::Target) -> Option<A::Output>

Calls the redo method.

pub fn commit(self)

Commits the changes and consumes the checkpoint.

pub fn cancel(self, target: &mut A::Target) -> Vec<A::Output>

Cancels the changes and consumes the checkpoint.

Trait Implementations

impl<'a, A: Debug, S: Debug> Debug for Checkpoint<'a, A, S>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'a, A, S> From<&'a mut Record<A, S>> for Checkpoint<'a, A, S>

fn from(record: &'a mut Record<A, S>) -> Self

Converts to this type from the input type.