When to Use Macros

Macros are worth it when a function cannot do the job because a function always evaluates its arguments before it runs.

Good reasons to write a macro:

• You need to control evaluation (like when, and, or).
• You want to introduce bindings or a control-flow shape that reads cleanly.
• You want a small DSL that removes boilerplate without hiding behavior.

Bad reasons:

• “It’s shorter.”
• “It’s faster.” (performance usually comes from algorithm/data choices, not macros)
• “It feels more Lispy.”

If you can solve the problem with a function and good naming, that is usually the better choice.

In this section

• Clojure Macros: Appropriate Use Cases for Java Developers
  Explore the appropriate use cases for Clojure macros, including eliminating repetitive code patterns, implementing new control flow constructs, and embedding domain-specific languages (DSLs).
• Clojure Alternatives to Macros: Functions and Beyond
  Explore the alternatives to macros in Clojure, focusing on functions as the primary tool for code reuse and abstraction, and understand when macros are necessary.
• Understanding the Potential Risks of Macros in Clojure
  Explore the potential risks associated with using macros in Clojure, including increased code complexity, debugging challenges, and unexpected behavior. Learn best practices for cautious use and thorough testing.