Trait DynCast

pub trait DynCast<T: DynCastConfig> {
    // Required methods
    fn dyn_cast_ref(&self) -> Result<&T::Target, &T::Source>;
    fn dyn_cast_mut(&mut self) -> Result<&mut T::Target, &mut T::Source>;
    fn dyn_cast_boxed(self: Box<Self>) -> Result<Box<T::Target>, Box<T::Source>>;
    fn dyn_cast_rc(self: Rc<Self>) -> Result<Rc<T::Target>, Rc<T::Source>>;
    fn dyn_cast_arc(self: Arc<Self>) -> Result<Arc<T::Target>, Arc<T::Source>>;
}

Cast a trait object (T::Source) into a different trait object (T::Target).

This trait is object safe and provides methods to convert from one fat pointer to another. This can be used as a supertrait or via trait bounds to allow casting between two different trait objects. But for usage it is more ergonomic to use the methods that are provided by the DynCastExt trait than to call the methods on this trait directly.

Required Methods

fn dyn_cast_ref(&self) -> Result<&T::Target, &T::Source>

Cast a shared reference of this trait object to another trait object.

fn dyn_cast_mut(&mut self) -> Result<&mut T::Target, &mut T::Source>

Cast a mutable/unique reference of this trait object to another trait object.

fn dyn_cast_boxed(self: Box<Self>) -> Result<Box<T::Target>, Box<T::Source>>

Available on crate feature alloc only.

Cast a boxed trait object to another trait object.

fn dyn_cast_rc(self: Rc<Self>) -> Result<Rc<T::Target>, Rc<T::Source>>

Available on crate feature alloc only.

Cast a reference counted trait object to another trait object.

fn dyn_cast_arc(self: Arc<Self>) -> Result<Arc<T::Target>, Arc<T::Source>>

Available on crate feature alloc only.

Cast an atomically reference counted trait object to another trait object.

Implementors

impl<C, T> DynCast<C> for T

where C: DynCastConfig, T: DerivedDynCast<ConcreteDynCastConfig<C::Source, C::Target>, C>,