Trait Hash 

pub trait Hash:
    Pod
    + Eq
    + Send
    + Sync { }

A marker trait that indicates some useful properties of a hash type

It’s not strictly necessary, but for many implementations it’s a useful set of constraints

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.

Implementors

impl<T> Hash for T

where T: Pod + Eq + Send + Sync,