Generics

This section explains how you can define your own generic classes that takeone or more type parameters, similar to built-in types such as List[X].User-defined generics are a moderately advanced feature and you can get farwithout ever using them – feel free to skip this section and come back later.

• Defining generic classes
• Generic class internals
• Defining sub-classes of generic classes
• Generic functions
• Generic methods and generic self
• Variance of generic types
• Type variables with value restriction
• Type variables with upper bounds
• Declaring decorators
• Generic protocols
• Generic type aliases