Trait Downcast

pub trait Downcast: Any {
    // Required methods
    fn into_any(self: Box<Self>) -> Box<dyn Any>;
    fn into_any_rc(self: Rc<Self>) -> Rc<dyn Any>;
    fn as_any(&self) -> &dyn Any;
    fn as_any_mut(&mut self) -> &mut dyn Any;
}

Supports conversion to Any. Traits to be extended by impl_downcast! must extend Downcast.

Required Methods

fn into_any(self: Box<Self>) -> Box<dyn Any>

Converts Box<dyn Trait> (where Trait: Downcast) to Box<dyn Any>, which can then be downcast into Box<dyn ConcreteType> where ConcreteType implements Trait.

fn into_any_rc(self: Rc<Self>) -> Rc<dyn Any>

Converts Rc<Trait> (where Trait: Downcast) to Rc<Any>, which can then be further downcast into Rc<ConcreteType> where ConcreteType implements Trait.

fn as_any(&self) -> &dyn Any

Converts &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s.

fn as_any_mut(&mut self) -> &mut dyn Any

Converts &mut Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &mut Any’s vtable from &mut Trait’s.

Implementors

impl<T: Any> Downcast for T