Struct EnvelopeMut 

pub struct EnvelopeMut<'a> { /* private fields */ }

A mutably borrowed reflected value with read + write capability access.

Created by reflect_mut! or Envelope::as_mut. Analogous to &mut [T]. Provides mutable access to capabilities without consuming the original value.

Example

let mut value = Counter { count: 42 };
let mut envelope_mut = reflect_mut!(&mut value);
envelope_mut.get_mut::<ResettableCap>().unwrap().reset();
assert_eq!(value.count, 0);

Implementations

impl<'a> EnvelopeMut<'a>

pub fn from_parts(data: &'a mut dyn Any, caps: CapabilityMap) -> Self

pub fn caps(&self) -> &CapabilityMap

Get a shared reference to the capability map.

pub fn as_ref(&self) -> EnvelopeRef<'_>

Downgrade to a read-only EnvelopeRef.

pub fn get<C: Capability>(&self) -> Option<&C::Handle>

Get a shared reference to the capability’s trait object.

Returns None if the wrapped type doesn’t implement the capability’s trait bound.

pub fn get_mut<C: Capability>(&mut self) -> Option<&mut C::Handle>

Get a mutable reference to the capability’s trait object.

Returns None if the wrapped type doesn’t implement the capability’s trait bound.

pub fn has<C: Capability>(&self) -> bool

Check whether this envelope’s value has a given capability.

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

Get a shared reference to the underlying concrete type.

Returns None if T doesn’t match the actual stored type.

pub fn data_mut<T: 'static>(&mut self) -> Option<&mut T>

Get a mutable reference to the underlying concrete type.

Returns None if T doesn’t match the actual stored type.

pub fn capability_count(&self) -> usize

The number of capabilities detected on this value.