Struct Variant

pub struct Variant { /* private fields */ }

A value that exists in one of multiple possible states. Each state may optionally have a type associated with it.

Implementations

impl Variant

pub fn new( ty: VariantType, discriminant: usize, value: Option<Value>, ) -> Result<Self>

Creates a new variant for the given discriminant and optional value. The value’s type must match the variant’s type for the selected state.

pub fn discriminant(&self) -> usize

Gets the index that describes in which state this value exists.

pub fn value(&self) -> Option<Value>

Gets the typed value associated with the current state, if any.

pub fn ty(&self) -> VariantType

Gets the type of this value.

Trait Implementations

impl Clone for Variant

fn clone(&self) -> Variant

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Variant

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

Formats the value using the given formatter.

impl PartialEq for Variant

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