Struct Extensions 

pub struct Extensions { /* private fields */ }

Type-safe extensions container.

Stores typed values keyed by TypeId for O(1) retrieval without runtime type checking after initial insertion.

Implementations

impl Extensions

pub fn new() -> Self

Create a new empty extensions container.

pub fn with_capacity(capacity: usize) -> Self

Create with pre-allocated capacity.

pub fn insert<T: Send + Sync + 'static>(&mut self, value: T)

Insert a typed value into the extensions.

If a value of this type already exists, it is replaced.

Example

use armature_core::Extensions;

let mut ext = Extensions::new();
ext.insert(42i32);
ext.insert("hello");

pub fn insert_arc<T: Send + Sync + 'static>(&mut self, value: Arc<T>)

Insert an Arc-wrapped value directly.

This is more efficient when you already have an Arc.

pub fn get<T: Send + Sync + 'static>(&self) -> Option<&T>

Get a reference to a typed value.

Returns None if no value of this type exists.

Performance

This is O(1) and only involves a HashMap lookup followed by a pointer cast (no runtime type checking).

Example

use armature_core::Extensions;

let mut ext = Extensions::new();
ext.insert(42i32);

assert_eq!(ext.get::<i32>(), Some(&42));
assert_eq!(ext.get::<String>(), None);

pub fn get_arc<T: Send + Sync + 'static>(&self) -> Option<Arc<T>>

Get an Arc reference to a typed value.

This is useful when you need to clone the Arc for async operations.

pub fn contains<T: Send + Sync + 'static>(&self) -> bool

Check if a value of this type exists.

pub fn remove<T: Send + Sync + 'static>(&mut self) -> bool

Remove a typed value from the extensions.

Returns true if the value existed and was removed.

pub fn clear(&mut self)

Clear all extensions.

pub fn len(&self) -> usize

Get the number of extensions.

pub fn is_empty(&self) -> bool

Check if extensions is empty.

pub fn extend(&mut self, other: Extensions)

Merge another extensions container into this one.

Values from other will overwrite values in self for the same type.

Trait Implementations

impl Clone for Extensions

fn clone(&self) -> Extensions

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Extensions

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

Formats the value using the given formatter.

impl Default for Extensions

fn default() -> Extensions

Returns the “default value” for a type.