Understanding and Implementing a Macro System
Macros are a powerful tool that allow programmers to extend the syntax of a language. In a language with macros, features like for-loops, while-loops, and pattern matching can be implemented as a library by users of the langauge! In this post, we’ll discover what macros are, how and why to use them, and how to implement a tiny language with a simple macro system.
For this post, you’ll need some familiarity with Racket, but no familiarity with macros is required. If you don’t know what something is, click on the variable name in the code and you’ll be taken to its documentation.