algal

/*
 
 ## background
 
 When you write a function that mutates the var properties of a
 mutable struct, this _creates a new instance_.[1] As a result,
 a variable pointing to a value of this type before the mutation
 will still be pointing to the old value after the mutation, as long
 as you did not use that variable to do the mutation.
 

JadenGeller

class Number /* class cluser */ {
    class Int8: Number {
        var value: Swift.Int8
        init(_ value: Swift.Int8) { self.value = value }
    }
    class Int: Number {
        var value: Swift.Int
        init(_ value: Swift.Int) { self.value = value }
    }