Struct AnyBox 

pub struct AnyBox<M: SendMarker = ()> { /* private fields */ }

A container for any instance works similar to C++’s std::any and is made to replace Arc<dyn Any>. The key difference from Arc<dyn Any> is that small instances (up to 8 bytes) are stored in the AnyBox instance

Implementations

impl AnyBox<()>

pub fn new<T: Send + Sized + 'static>(item: T) -> Self

impl AnyBox<NoSend>

pub fn new_nosend<T: Sized + 'static>(item: T) -> Self

impl<M: SendMarker> AnyBox<M>

pub fn empty() -> Self

Creates an empty box (initialized with empty tuple) - can be used for delayed initialization. The instance doesn’t require a drop call as the empty tuple instance will be places inte the box’s internal storage, and the tuple instance doesn’t require dropping.

pub fn get_type_id(&self) -> TypeId

Returns a TypeId instance associated with a stored value.

pub fn is_empty(&self) -> bool

Checks whether the instance holds nothing

pub fn is<T: Sized + 'static>(&self) -> bool

Checks whether the instance holds an instance of a type T

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

Returns a borrow of a stored value if it’s an instance of a type T

pub unsafe fn get_unchecked<T: Sized + 'static>(&self) -> &T

Returns a borrow of a stored value if it’s an instance of a type T

Safety:

User must be sure that the instance holds a value of T

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

pub unsafe fn get_mut_unchecked<T: Sized + 'static>(&mut self) -> &mut T

pub fn take<T: Sized + 'static>(self) -> Result<T, Self>

pub unsafe fn take_unchecked<T: Sized + 'static>(self) -> T

Trait Implementations

impl<M: Debug + SendMarker> Debug for AnyBox<M>

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

Formats the value using the given formatter.

impl Display for AnyBox

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

Formats the value using the given formatter.

impl<M: SendMarker> Drop for AnyBox<M>

fn drop(&mut self)

Executes the destructor for this type.