pyret - Programming language

pyret is a programming language created in 2011 by Joe Gibbs Politz.

#477on PLDB

13Years Old

Download source code:

git clone https://github.com/brownplt/pyret-lang

Pyret is a programming language designed to serve as an outstanding choice for programming education while exploring the confluence of scripting and functional programming. It's under active design and development, and free to use or modify.

Tags: programming language
pyret is developed on GitHub and has 1,061 stars
Early development of pyret happened in Brown University
Learn pyret on exercism.
pyret.org was registered in 2011

Example from the web:

data BinTree:
 | leaf
 | node(value, left, right)
end
fun tree-sum(t):
  doc: "Calculate the sum of node values"
  cases (BinTree) t:
    | leaf => 0
    | node(v, l, r) =>
      v + tree-sum(l) + tree-sum(r)
  end
where:
  tree-sum(leaf) is 0
  node4 = node(4, leaf, leaf)
  tree-sum(node(5, node4, leaf)) is 9
end

Example from hello-world:

print('Hello World')

Language features

Feature	Supported	Example	Token
Strings	✓	'Hello world'	'
Print() Debugging	✓		print