Exercises

Read:

• The Enumerable protocol (https://github.com/elixir-lang/elixir/blob/v1.0.5/lib/elixir/lib/enum.ex) in the Elixir source

• The typespec documentation (http://elixir-lang.org/docs/stable/elixir/#!Kernel.Typespec.html)

Do:

• Write your own unless macro. You may use either your if from the chapter or the standard library if:

  • Does using the standard library, if, produce a deeper AST than using case directly?

• Write your own while macro:

  • Use the test WhileTest module to make sure it functions correctly.

  • Add a test case for a break statement. (Hint: It will look similar to the test case provided.) Now add break to your macro.