scheme-stuff

This is my random collection of Scheme stuff.

Building it

If Gambit's installed and gsc is in the path, you should only need to run make. NOTE: Gambit must be configured with the --enable-auto-force option for some things to work.

Making it Load Automatically

Edit or create ~/.gambcini and put this in it:

(load "~/src/scheme-stuff/scheme-stuff.o1")
(include "~/src/scheme-stuff/scheme-stuff#.scm")

Except, of course, that you'll need to change the paths to the location where you've checked this out.

Generic Functions

This has a simple, useful implementation of generic functions, by way of the DEFINE-GENERIC and ADD-METHOD macros, which work like so:

(define-generic (add a b))
(add-method (add (number? a) (number? b))
  (+ a b))
(add-method (add (string? a) (string? b))
  (string-append a b))

(add 2 5) => 7
(add "hello, " "world!") => "hello, world!"

Lazy Sequences

The following generic functions are used to produce lazy sequences:

(->list something-iterable) => #<lazy list>

Lazy ranges can be produced like so:

(range from: 2 to: 200 step: 2)

Other Stuff

I'm too lazy to document everything.