Chapter 3
Use Your Powers Wisely

Now that you have the knowledge you need about how to write macros, it’s time to start building a great sense for when to write them. Believe it or not, macros do have downsides. In fact, there’s a popular saying in the Clojure world that you should never use a macro when a function will do. In this chapter you’ll see some problems that are inherent to macros, a few outright mistakes to avoid, and some design decisions that can make maintenance harder down the road.