Enum Presence 

pub enum Presence {
    Required,
    Optional,
    NonSpec,
}

Whether a field must be present in its containing object.

Variants

Required

The schema requires the field. Its absence is a violation (also reported as Warning::MissingField).

Optional

The schema permits the field to be absent.

NonSpec

The spec for this version does not define the field, but this layer reads it when a document supplies it, because real-world documents carry it.

Its absence is not a violation; its presence is reported as Warning::NonSpecField so the caller still learns the document is off-spec.

Trait Implementations

impl Clone for Presence

fn clone(&self) -> Presence

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Presence

impl Debug for Presence

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

Formats the value using the given formatter.

impl Eq for Presence

impl PartialEq for Presence

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Presence