Trait TypeMapKey 

pub trait TypeMapKey: Any {
    type Value: Any + Send + Sync;
}

TypeMapKey is used to declare key types that are eligible for use with TypeMap.

Required Associated Types

type Value: Any + Send + Sync

Defines the value type that corresponds to this TypeMapKey.

Dyn Compatibility

This trait is dyn compatible.

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

Implementors