Macros

Macros are functions that run at macro-expansion time and return Clojure code (data) that becomes part of your program. They let Clojure introduce new syntactic forms—things that look like language features.

For Java engineers, a useful analogy is “compile-time transformation,” but with direct access to the program’s syntax.

The discipline is simple:

• Prefer a function first.
• Write a macro only when you need to control evaluation, introduce bindings, or create a small DSL.
• Use macroexpand-1 early and often to see what your macro really generates.

In this section

• Understanding Macros in Lisp: A Deep Dive into Clojure's Metaprogramming
  Explore the power of macros in Lisp languages like Clojure, and learn how they enable code transformation and generation during compilation.
• Harnessing the Power of Macros in Clojure: A Deep Dive for Java Developers
  Explore the expressive power of Clojure macros, their ability to create new control structures, embed domain-specific languages, and reduce boilerplate code, extending the language to suit specific needs.
• When to Consider Using Macros in Clojure: A Guide for Java Developers
  Explore when to use macros in Clojure, understanding their benefits and potential pitfalls for Java developers transitioning to functional programming.