Trait glib::object::Downcast

pub trait Downcast<T> {
    fn can_downcast(&self) -> bool;
    fn downcast(self) -> Result<T, Self>
    where
        Self: Sized;
    unsafe fn downcast_unchecked(self) -> T;
}

Downcasts support.

Required Methods

fn can_downcast(&self) -> bool

Checks if it's possible to downcast to T.

Returns true if the instance implements T and false otherwise.

fn downcast(self) -> Result<T, Self> where
    Self: Sized, 

Tries to downcast to T.

Returns Ok(T) if the instance implements T and Err(Self) otherwise.

unsafe fn downcast_unchecked(self) -> T

Downcasts to T unconditionally.

Panics if compiled with debug_assertions and the instance doesn't implement T.

Implementors

• impl<Super: IsA<Super>, Sub: IsA<Super>> Downcast<Sub> for Super