Behaviour and Protocol in elixir. Polymorphism
Understanding protocol and behaviours in Elixir with tetris.
I have different kinds of Shapes including s_shape, box_shape, t-shape, etc. At the end, all are Shapes.
I can have 3 modes of rotation.
1> Just rotate. same shape in different angle. [RegularRotate]
2> Rotate but change color of shape. [ChameleonRotate]. Girgit i.e Chameleon is an animal that changes its color.
3> change it to complete new shape on rotate. Example… s_shape -> rotate makes it t-shape. Again rotate makes it L-shape. Add image for better understanding [EvilRotate]
Behaviour or Protocol?
Recap of elemets… s-shape, t-shape, regular-rotate, EvilRotate, ChameleonRotate
protocol wont help because all are shape structs behaviour? add behaviour on RegularShape and GirgitShape?
So, when to use Behaviour and Protocol?
Rule of thumb, when you have different structs, you need Protocol. Behaviour is added on Modules.
hirerchy -> same level -> t-shape, evil-shape
how to test? use Dialyzer