unsafe-any 0.4.2

Traits and implementations for unchecked downcasting.

Unsafe-Any Build Status

Convenience traits for unsafe downcasting from trait objects to concrete types.


This crate defines two new traits UncheckedAnyDowncast and UncheckedAnyMutDowncast, which define methods for downcasting to any type that implements Any from implemented trait objects.

It also defines two convenience implementations of these traits for &'a Any and &'a mut Any, which are the most common trait objects that you might downcast from.


let a = box 7u as Box<Any>;
unsafe { assert_eq!(*a.downcast_ref_unchecked::<uint>(), 7u); }