pub trait RefCast {
type From: ?Sized;
// Required methods
fn ref_cast(from: &Self::From) -> &Self;
fn ref_cast_mut(from: &mut Self::From) -> &mut Self;
}Expand description
Safely cast &T to &U where the struct U contains a single field of
type T.
// `&String` can be cast to `&U`.
#[derive(RefCast)]
#[repr(transparent)]
struct U(String);
// `&T` can be cast to `&V<T>`.
#[derive(RefCast)]
#[repr(transparent)]
struct V<T> {
t: T,
}See the crate-level documentation for usage examples!
Required Associated Types§
Required Methods§
fn ref_cast(from: &Self::From) -> &Self
fn ref_cast_mut(from: &mut Self::From) -> &mut Self
Dyn Compatibility§
This trait is not dyn compatible.
In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.