Enum NullabilityHandling 

pub enum NullabilityHandling {
    Mirror,
    DeclaredOutput,
    Discrete,
}

Available on crate feature parse only.

How a function handles null inputs and produces nullable outputs

Variants

Mirror

Nullability of output mirrors the nullability of input(s)

DeclaredOutput

Function explicitly declares the nullability of its output

Discrete

Function handles nulls in a custom way per implementation

Trait Implementations

impl Clone for NullabilityHandling

fn clone(&self) -> NullabilityHandling

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for NullabilityHandling

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

Formats the value using the given formatter.

impl From<NullabilityHandling> for NullabilityHandling

fn from(raw: RawNullabilityHandling) -> Self

Converts to this type from the input type.

impl PartialEq for NullabilityHandling

fn eq(&self, other: &NullabilityHandling) -> 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 NullabilityHandling