Exercise 053: Require for Macros

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Exercise 053: Require for Macros

Topic: Module Organization
Level: 12
Difficulty: 2

Prerequisites

• Exercise 052: Import and Alias
• Basic understanding of compilation

Learning Objectives

Students will learn to:

• Use require for modules with macros
• Understand when require is needed
• Know the difference between require and import

Key Concepts

• require ensures module is compiled first
• Needed for macros
• require + import pattern

Exercise Structure

• Explain require is for macros (compile-time code)
• Show example with Integer.is_odd macro
• Task: Use require to access a macro
• Expected output: Successfully using required macro

Hints

You need require for macros because they run at compile-time

References

• Elixir docs: https://hexdocs.pm/elixir/Kernel.SpecialForms.html#require/2