Enum Course 

pub enum Course {
    Sweep,
    WriteBack,
    Ask,
}

What recovery does about a session left behind, without being told.

Exhaustive over State on purpose. Two predicates would let a state added later fall into whichever bucket the negation happened to put it in, and the buckets here are delete it, write to somebody’s container and interrupt them — three things that must never be picked by accident.

Variants

Sweep

Nothing was lost. Remove it and say nothing (concept 6.3).

WriteBack

An edit that never reached a container that is still where it was. Put it back, and say so.

Ask

Only a person can settle it.

Trait Implementations

impl Clone for Course

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Course

impl Debug for Course

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

Formats the value using the given formatter.

impl Eq for Course

impl PartialEq for Course

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Course