Struct Caster 

struct Caster {
    cast_to_ref: Box<dyn Any + Send + Sync>,
    cast_to_arc: Box<dyn Any + Send + Sync>,
}

A single entry in a CastTable.

Each Caster exists for one concrete object type “O”, and one trait type “Tr”.

Note that we use Box here in order to support generic types: you can’t get a &'static reference to a function that takes a generic type in current rust.

Fields

cast_to_ref: Box<dyn Any + Send + Sync>

Actual type: fn(Arc<dyn Object>) -> Arc<dyn Tr>

Panics if Object does not have the expected type (O).

cast_to_arc: Box<dyn Any + Send + Sync>

Actual type: fn(Arc<dyn Object>) -> Arc<dyn Tr>

Panics if Object does not have the expected type (O).