Trait atsamd_hal::typelevel::Is

source · [−]
pub trait Is where
    Self: Sealed,
    Self: From<IsType<Self>>,
    Self: Into<IsType<Self>>,
    Self: AsRef<IsType<Self>>,
    Self: AsMut<IsType<Self>>, {
    type Type;
}
Expand description

Marker trait for type identity

This trait is used as part of the AnyKind trait pattern. It represents the concept of type identity, because all implementors have <Self as Is>::Type == Self. When used as a trait bound with a specific type, it guarantees that the corresponding type parameter is exactly the specific type. Stated differently, it guarantees that T == Specific in the following example.

where T: Is<Type = Specific>

Moreover, the super traits guarantee that any instance of or reference to a type T can be converted into the Specific type.

fn example<T>(mut any: T)
where
    T: Is<Type = Specific>,
{
    let specific_mut: &mut Specific = any.as_mut();
    let specific_ref: &Specific = any.as_ref();
    let specific: Specific = any.into();
}

Required Associated Types

Implementors