Enum Nullability 

pub(crate) enum Nullability {
    NullFirst,
    NullSecond,
}

Avro types are not nullable, with nullability instead encoded as a union where one of the variants is the null type.

To accommodate this, we specially case two-variant unions where one of the variants is the null type, and use this to derive arrow’s notion of nullability

Variants

NullFirst

The nulls are encoded as the first union variant

NullSecond

The nulls are encoded as the second union variant

Implementations

impl Nullability

pub(crate) fn non_null_index(&self) -> usize

Returns the index of the non-null variant in the union.

Trait Implementations

impl Clone for Nullability

fn clone(&self) -> Nullability

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Nullability

impl Debug for Nullability

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

Formats the value using the given formatter.

impl Default for Nullability

fn default() -> Nullability

Returns the “default value” for a type.

impl PartialEq for Nullability

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for Nullability