Lens

Aliases: —

Provenance: commit 1c330dc622 · authored 2026-02-12T12:11:09+01:00 · agent claude-code · model sonnet

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.

(* Simple Lens example - bidirectional get/put *)
let swap : (string * string) <-> (string * string) =
  lens snd <-> fst
  in fun (x, y) -> (y, x)

(* Test the lens *)
let result = swap.get ("hello", "world")