Mike Fikes explains the ClojureScript Compiler (from https://cljs.pro)

This is a guest lecture by Mike Fikes for the Professional ClojureScript 2021-02 cohort.

Over a 3.5 hour period, Mike explains the major steps of the ClojureScript compiler (reader, macros, analyzer, emitter) and shows examples in a REPL and compiler code directly.

Mike Fikes is a ClojureScript core contributor and the author of several popular ClojureScript projects like Planck and Replete. You can find Mike on Twitter at @mfikes or GitHub at https://github.com/mfikes.

Professional ClojureScript is a 3 month bootcamp-style course for programmers who want to level up their careers and learn ClojureScript. Course details can be found at https://cljs.pro

There are several links mentioned in the video listed below:

- Self-hosted ClojureScript REPL online: https://clojurescript.io/

- Maria Geller explains self-hosted ClojureScript: https://www.youtube.com/watch?v=NDhbXuqBjBI

- ClojureScript compilation pipeline: http://blog.fogus.me/2012/04/25/the-clojurescript-compilation-pipeline/

- clj-kondo is a linter for your Clojure(Script) code: https://github.com/clj-kondo/clj-kondo

- Immediately Invoked Function Expression: https://developer.mozilla.org/en-US/docs/Glossary/IIFE

Chapters:

0:00 Introduction
5:43 Meaning of interpreted and compiled languages
9:20 Self-hosted ClojureScript
21:20 Compilation Pipeline
26:56 The Reader
1:04:15 The Analyzer
2:23:18 Macros
2:44:39 JavaScript Code Emission
3:10:20 Google Closure Compiler
3:16:13 Compilation Pipeline Final Steps
3:22:28 Wrap Up / Questions