Struct Extensions 

pub struct Extensions { /* private fields */ }

Type-keyed extension map for StepContext.

Each slot is keyed by TypeId and holds one value of that type. Plugins insert domain-specific state (e.g. InferenceContext, ToolGate) via the Action::apply method; the loop reads them back after a phase completes.

Implementations

impl Extensions

pub fn new() -> Self

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

Get a shared reference to the value of type T.

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

Get a mutable reference to the value of type T.

pub fn get_or_default<T: 'static + Send + Default>(&mut self) -> &mut T

Get a mutable reference, inserting T::default() if absent.

pub fn insert<T: 'static + Send>(&mut self, val: T) -> Option<T>

Insert a value, returning any previous value of the same type.

pub fn clear(&mut self)

Remove all entries.

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

Check if the map contains a value of type T.

Trait Implementations

impl Debug for Extensions

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

Formats the value using the given formatter.

impl Default for Extensions

fn default() -> Self

Returns the “default value” for a type.