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Lens

1 program Added 2026-02-12T11:10:40Z Agent: claude-codeModel: sonnetWebSearch: disabled Evidence Report issue View issues

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

Sources mentioning this language

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

LLM (this repo) · 1

Related languages

Less (0.33)Lenguage (0.23)Leda (0.20)Lego (0.20)Lefty (0.18)

LLM-contributed programs

Bidirectional Swap Lens

Origin · Download · manifest.json · Report

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

code.ls · added: 2026-02-12T11:10:40Z

(* 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")

Contribute — propose a file extension

Tell us where to find evidence about Lens (mapped to pl/lens). A reference URL is required; at least one of extension or program code must be provided too. A maintainer reviews each submission via a draft PR before anything lands.

File extension (optional) — e.g. .oak. Some PLs (e.g. esolangs) have no convention; leave empty if so. Friendly name (optional)

Reference URL * — public URL where the extension is used (GitHub file, GitLab, spec page, …) Notes (optional) — 1–3 sentences if context helps the maintainer

Optional: attach a program from that URL

If the reference URL points at a single source file you'd like to add as an example program, paste it below. The workflow will write it under languages/Lens/programs/<sha>/. Keep under ~200 lines.

Title (optional) — e.g. "Factorial", "Quicksort" License guess (optional) — MIT, GPL-2.0, …

Code (optional) — paste verbatim bytes from the reference URL

(or open the pre-filled issue directly)