Struct Undoing 

pub struct Undoing<'a, R, P> {
    pub before: &'a R,
    pub after: &'a R,
    pub minted: &'a [Id],
    pub params: &'a P,
}

What a verb’s declared undo (#[action(undo = path)]) is computed from: the record before and after the verb ran, the ids it minted (the outbox entry it queued) and its parameters. The undo returns the verb that compensates, which undo applies like any action, so its own outbox entries are queued and drained the same way, and which reads at that time how the original entry settled (where the trashed file went).

Fields

before: &'a R

after: &'a R

minted: &'a [Id]

params: &'a P

Trait Implementations

impl<R, P> Clone for Undoing<'_, R, P>

fn clone(&self) -> Undoing<'_, R, P>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<R, P> Copy for Undoing<'_, R, P>