Nim in Action

Chapter 9. Metaprogramming

This chapter covers

• Understanding metaprogramming and its uses
• Using generics to remove code duplication
• Constructing a Nim abstract syntax tree
• Executing code at compile time
• Using templates and macros

This chapter describes one of the most advanced and most powerful features in the Nim programming language: metaprogramming, composed of a number of components including generics, templates, and macros.

Metaprogramming is a feature of Nim that gives you the ability to treat your application’s source code as data. This means you can write code that reads, generates, analyses, and modifies other code. Being able to perform such activities brings many advantages, including allowing you to minimize the number of ...