pyret is a programming language created in 2011 by Joe Gibbs Politz.
|#634on PLDB||12Years Old||1.2kUsers|
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.
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