Building a Mesche Module for Graphics

Feb 22, 2022

Today's goal: Continue building out the flux graphics module in Mesche!

Updates

  • Added support for cons pairs, lists, and backquoting
  • Added initial support for modules!
  • I'm thinking about participating in Ludum Dare April 1: https://ludumdare.com/

The Mesche module system

Over the last few days, I wrote a new module system for Mesche that allows you to do the following:

  • Define modules in source files
  • Mark functions and variables to be exported from the module
  • Import symbols exported by other modules (no load path yet!)

Here's what it looks like: 

;; Define the first module
(define-module (mesche-sample one))

(define one-value 311 :export)

(define (one-print str) :export
  (display "This string comes from ")
  (display str)
  (display "!"))

;; Define the second module
(define-module (mesche-sample two)
  (import (mesche-sample one)))

(define (two-print str) :export
  (one-print "(mesche-sample two)")
  (display " ")
  (display str))

;; Switch to the user module and import something!
(define-module (mesche-user)
  (import (mesche-sample two)))

;; Call the imported function
(two-print "Hello modular world!")

Tasks

DONE Finish building out the functions to describe the full thumbnail

TODO Ensure we can dynamically re-evaluate the scene description

TODO Start working on load path support

Next Steps

TODO Implement asynchronous REPL support

TODO Ensure we can dynamically re-evaluate the scene description

TODO Implement module load path support