Enum ScalarNullability 

pub enum ScalarNullability {
    AlwaysNull,
    AlwaysNonNull,
    MaybeNull,
}

The possible null states of a scalar expression.

Variants

AlwaysNull

AlwaysNonNull

MaybeNull

Implementations

impl ScalarNullability

pub const fn can_be_null(self) -> bool

pub const fn can_be_non_null(self) -> bool

Trait Implementations

impl Clone for ScalarNullability

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 ScalarNullability

impl Debug for ScalarNullability

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

Formats the value using the given formatter.

impl Eq for ScalarNullability

impl PartialEq for ScalarNullability

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ScalarNullability