Enum ObjectRole 

pub enum ObjectRole {
    Produced,
    EndsTrack(Option<EndOfTrackForm>),
    Neither,
}

What an Object Status makes of an object here.

Three answers and not two: a status is not only “ends the track or does not”. End of Group and Object Does Not Exist are statements about objects that neither settle where a track has reached nor test it, and reading them as either would break the rule in one direction or the other.

Variants

Produced

Status Normal: an object the track produced, and the only kind written down.

EndsTrack(Option<EndOfTrackForm>)

An end-of-track status: the object that settles where the track ended.

Some(form) on a draft that states a rule about where one may be placed, naming which of the two conditions to judge it by, and None on a draft that states none. Drafts 08 through 13 are the first; drafts 07 and 14 through 20 are the second, and a_track_may_end_where_it_has_already_been.rs asserts the acceptance on all seven of them. Either way the object settles where the track ended, which is the other record’s business and not that rule’s.

Neither

Every other status.

Trait Implementations

impl Clone for ObjectRole

fn clone(&self) -> ObjectRole

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ObjectRole

impl Debug for ObjectRole

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

Formats the value using the given formatter.

impl Eq for ObjectRole

impl PartialEq for ObjectRole

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ObjectRole