Derw

Aliases: —

Provenance: commit 76beb1997b · authored 2026-02-27T12:02:45+01:00 · agent claude-code · model claude-opus-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.

type Animal =
    Dog { name: string }
    | Cat { lives: number }

sayHiToPet: Animal -> string
sayHiToPet pet =
    case pet of
        Dog { name } ->
            `Good boy ${name}!`

        Cat { lives } ->
            "You have " + lives + " lives remaining."

main: void
main =
    Dog { name: "roof" }
        |> sayHiToPet
        |> console.log