Struct Key

pub struct Key<T: 'static> { /* private fields */ }

A typed key for the attribute dictionary.

Each key is associated with a specific type T and has a unique name. Keys are typically created using the declare_attrs! macro which ensures they have static lifetime and automatically registers them for serialization.

Implementations

impl<T: Named + 'static> Key<T>

pub const fn new(name: &'static str) -> Self

Creates a new key with the given name.

pub const fn with_default(name: &'static str, default_value: &'static T) -> Self

Creates a new key with the given name and default value reference.

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

Returns the name of this key.

pub fn default(&self) -> Option<&'static T>

Returns a reference to the default value for this key, if one exists.

pub fn has_default(&self) -> bool

Returns whether this key has a default value.

pub fn typehash(&self) -> u64

Returns the type hash of the associated value type.

Trait Implementations

impl<T: 'static> Clone for Key<T>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Send + Sync + Serialize + DeserializeOwned + Named + 'static> Index<Key<T>> for Attrs

type Output = T

The returned type after indexing.

fn index(&self, key: Key<T>) -> &Self::Output

Performs the indexing (container[index]) operation.

impl<T: Send + Sync + Serialize + DeserializeOwned + Named + Clone + 'static> IndexMut<Key<T>> for Attrs

fn index_mut(&mut self, key: Key<T>) -> &mut Self::Output

Performs the mutable indexing (container[index]) operation.

impl<T: 'static> Copy for Key<T>