Ruby Value Struct Example: Point

How to define a Point class using the value_struct gem:

require 'value_struct'

Point = ValueStruct.new_with_mixins(
 :x, 
 :y,
 [:dup_with_changes, :to_h, :freeze, :no_clone],
) do

 def initialize(x,y)
 raise ArgumentError, 'points must be initilized with two numerics' unless x.is_a?(Numeric) && y.is_a?(Numeric)
 super(x,y)
 end

 def abs
 ( x**2 + y**2 ) ** 0.5
 end

 def +(o)
 dup(x: x + o.x, y: y + o.y)
 end

 def -(o)
 dup(x: x - o.x, y: y - o.y)
 end

 def +@
 self
 end

 def -@
 dup(x: -x, y: -o.y)
 end

 def to_c
 Complex(x,y)
 end

 def to_s
 "(#{x},#{y})"
 end
 alias inspect to_s
end