Struct Decoration 

pub struct Decoration { /* private fields */ }

A type-erased value attached to a parser instance by a native plugin.

Equality-aware decorations created with Decoration::new can be compared when instances merge. Opaque decorations compare by shared allocation identity, which permits closures and other native handles to be inherited without pretending they have value equality.

Implementations

impl Decoration

pub fn new<T>(value: T) -> Self

where T: Any + PartialEq + Send + Sync,

pub fn opaque<T>(value: T) -> Self

where T: Any + Send + Sync,

pub fn downcast_ref<T: Any>(&self) -> Option<&T>

pub fn is<T: Any>(&self) -> bool

pub fn type_name(&self) -> &'static str

Trait Implementations

impl Clone for Decoration

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Decoration

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

Formats the value using the given formatter.