ref: 50f83a91220940042962fdb55d07bb03991f52be
parent: 347e5bc533070a5e988d82e7588a4e905c7096f3
author: Peter Mikkelsen <peter@pmikkelsen.com>
date: Wed Jun 30 13:03:25 EDT 2021
Add support for builtins, and implement true/0, fail/0, call/1, and !/0 builtins