Trait RbBack 

pub trait RbBack: Rb {
    type Checkpoint: Clone;

    // Required methods
    fn checkpoint<'a>(this: Self::Target<'a>) -> Self::Checkpoint;
    fn rollback<'a>(this: Self::Target<'a>, checkpoint: Self::Checkpoint);
}

Reborrow-friendly variant of Back.

Required Associated Types

type Checkpoint: Clone

A clonable checkpoint that can restore the input to an earlier state.

Required Methods

fn checkpoint<'a>(this: Self::Target<'a>) -> Self::Checkpoint

Create a rollback checkpoint.

fn rollback<'a>(this: Self::Target<'a>, checkpoint: Self::Checkpoint)

Roll back the input to a previously created checkpoint.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl RbBack for ()

type Checkpoint = ()

fn checkpoint<'a>(_: ()) -> Self::Checkpoint

fn rollback<'a>(_: (), _: Self::Checkpoint)

impl<'a, T: Back> RbBack for &'a mut T

type Checkpoint = <T as Back>::Checkpoint

fn checkpoint<'b>(this: &'b mut T) -> Self::Checkpoint

fn rollback<'b>(this: &'b mut T, checkpoint: Self::Checkpoint)

Implementors