Introduction

What are we building?

We will build a multithreaded Read Eval Print Loop.

TODO: image of three threads - main, user input, worker - with arrows between them

Why?

The goal is learning how to build an app that can:

• do multiple tasks concurrently
  • consume user input without blocking
  • parse commands that may have errors without crashing
• share knowledge between tasks
• is beginner friendly
  • no async
  • no borrows
  • no locks
  • no mutexes