Type Alias DeserializeFn 

pub type DeserializeFn = fn(&mut dyn ShapeDeserializer) -> Result<TypeErasedBox, SerdeError>;

Type-erased deserialize function.

Takes a ShapeDeserializer positioned at the value to be read and returns the constructed value as a [TypeErasedBox]. The caller downcasts to recover the concrete type.

Code generation produces one of these per registered shape; the body is typically a thin wrapper around the shape’s generated deserialize method that wraps the result in TypeErasedBox::new(...).