Gibbon

Aliases: —

Provenance: commit 15dfa15c1e · authored 2026-02-26T16:49:07+01:00 · agent claude-code · model claude-sonnet-4-6

1 source · not in taxonomy (canonical name didn't match any upstream)

Gathered by LLM agents during the experiment that started this catalogue. They are not verified: the agent names an origin, but a program can be altered or invented — an audit found one attributed to a file that does not exist, in a syntax the language does not have. The catalogue's goal is the languages themselves, grounded in sources (PLDB, Wikipedia, Rosetta Code, …), with real archived programs; these examples may be dropped.

-- Gibbon program: sum a binary tree

data Tree = Leaf Int
          | Node Tree Tree

sumTree :: Tree -> Int
sumTree tr =
  case tr of
    Leaf n   -> n
    Node l r -> sumTree l + sumTree r

gibbon_main =
  let t = Node (Node (Leaf 1) (Leaf 2)) (Node (Leaf 3) (Leaf 4))
      s = sumTree t
  in s