Trait Extern 

pub trait Extern {
    // Required method
    fn index<'host>(
        &'host self,
        index: Value<'host>,
    ) -> Result<Value<'host>, Error>;

    // Provided methods
    fn to_static<'host>(
        &self,
        partial_index: Option<Rc<Value<'host>>>,
    ) -> Option<StaticValue> { ... }
    fn any(&self) -> Option<&(dyn Any + 'static)> { ... }
    fn debug(&self, f: &mut Formatter<'_>) -> Result<(), Error> { ... }
}

Required Methods

fn index<'host>(&'host self, index: Value<'host>) -> Result<Value<'host>, Error>

Provided Methods

fn to_static<'host>( &self, partial_index: Option<Rc<Value<'host>>>, ) -> Option<StaticValue>

fn any(&self) -> Option<&(dyn Any + 'static)>

Allows the Extern trait object to be downcasted back into its original type.

Implementing this method is optional. The default implementation will always return None and reject all downcasting attempts via Value::downcast_extern.

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

Implementors