Patter

This is Patter(n Ruby).

What?

It’s a pattern matching thing for Ruby. It’s AWFUL.

How?

Patter macro parser

$ echo <<. >test.pr
fib(0) is
  1
end
fib(1) is
  1
end
fib(x) is
  fib(x-1) + fib(x-2)
end

puts fib(10)
.
$ ruby parse.rb <test.pr >test.rb
$ ruby test.rb

Include Patter

$ echo <<. >test.rb
require './patter'
include Patter

fib = Fun.new(:fibonacci)
fib.when(0){1}
fib.when(1){1}
fib.when(Var) do |n|
  fibonacci.call(n-1) + fibonacci.call(n-2)
end

puts fibonacci(10)
.
$ ruby test.rb

Why?

Clearly the Eldritch horrors are upon us.