Struct undo::Merged

pub struct Merged<R> { /* fields omitted */ }

The result of merging commands.

The merge! macro can be used for convenience when merging commands.

Methods

impl<R> Merged<R>

pub fn new(
    cmd1: impl Command<R> + 'static,
    cmd2: impl Command<R> + 'static
) -> Merged<R>

Merges cmd1 and cmd2 into a single command.

pub fn push(
    &mut self,
    command: impl Command<R> + 'static
)

Merges self with command.

pub fn join(
    self,
    command: impl Command<R> + 'static
) -> Merged<R>

Merges self with command and returns the merged command.

Trait Implementations

impl<R> Command<R> for Merged<R>

fn apply(&mut self, receiver: &mut R) -> Result

Applies the command on the receiver and returns Ok if everything went fine, and Err if something went wrong.

fn undo(&mut self, receiver: &mut R) -> Result

Restores the state of the receiver as it was before the command was applied and returns Ok if everything went fine, and Err if something went wrong.

fn redo(&mut self, receiver: &mut R) -> Result

Reapplies the command on the receiver and return Ok if everything went fine, and Err if something went wrong.

fn merge(&self) -> Merge

Used for automatic merging of commands.

impl<R, C: Command<R> + 'static> Extend<C> for Merged<R>

fn extend<T: IntoIterator<Item = C>>(&mut self, iter: T)

Extends a collection with the contents of an iterator.

impl<R> Default for Merged<R>

fn default() -> Self

Returns the "default value" for a type.

impl<R> IntoIterator for Merged<R>

type Item = Box<dyn Command<R>>

The type of the elements being iterated over.

type IntoIter = IntoIter<Self::Item>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.

impl<R> Debug for Merged<R>

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

Formats the value using the given formatter.

impl<R, C: Command<R> + 'static> FromIterator<C> for Merged<R>

fn from_iter<T: IntoIterator<Item = C>>(commands: T) -> Self

Creates a value from an iterator.