Introduction to Code Generation using Macros in Elixir

In this talk, Filipe Cabaço explains how to leverage macros in Elixir for code generation, highlighting the advantages and challenges of this approach. He starts by introducing himself and sharing his experience in Elixir, and then delves into the need for code generation, focusing on its benefits such as consistency, correctness, and laziness in development. Filipe then demonstrates how to use Elixir's EEx (Embedded Elixir) for templating, but points out its limitations in complex scenarios, such as generating code from OpenAPI specifications. He advocates for using macros despite their complexities, emphasizing the control and power they offer. Throughout the talk, Filipe showcases real-world examples, including generating Elixir code from JSON specifications and handling complex API clients. He also discusses the integration of compile-time checks and formatting to ensure code quality and maintainability.