Trait Variance 

pub trait Variance: Sealed + Default { }

🔬This is a nightly-only experimental API. (phantom_variance_markers #135806)

A marker trait for phantom variance types.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl Variance for PhantomContravariantLifetime<'_>

impl Variance for PhantomCovariantLifetime<'_>

impl Variance for PhantomInvariantLifetime<'_>

impl<T> Variance for PhantomContravariant<T>

where T: ?Sized,

impl<T> Variance for PhantomCovariant<T>

where T: ?Sized,

impl<T> Variance for PhantomInvariant<T>

where T: ?Sized,