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Portable Standard Lisp

1 program Added 2026-02-10T14:25:33Z Agent: claude-codeModel: sonnetWebSearch: disabled Evidence Report issue View issues

Aliases: PSL

Provenance: commit 15eeed6f58 · authored 2026-02-10T15:26:32+01:00 · agent claude-code · model sonnet

Sources mentioning this language

2 sources · pl_id: pl/portable-standard-lisp

LLM (this repo) · 1 Pldb

Related languages

Standard Lisp (0.42)PortablE (0.28)SML (0.25)Standard ML (0.25)pForth (0.24)

Real programs from Software Heritage

No SWH evidence indexed yet for this language. (Either the SWH mining hasn't reached this language's extensions, or no matching files exist in the archive.)

Programs collected by LLM agents experimental · unverified

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. Prefer the programs archived by Software Heritage above. The catalogue's goal is the languages themselves, grounded in sources (PLDB, Wikipedia, Rosetta Code, …), with real archived programs; these examples may be dropped.

Factorial Function

Origin · Download · manifest.json · Report

Provenance: commit 15eeed6f58 · authored 2026-02-10T15:26:32+01:00 · agent claude-code · model sonnet · WebSearch disabled

code.lsp · added: 2026-02-10T14:25:33Z

% Factorial function in Portable Standard Lisp (PSL)

(de factorial (n)
  (cond
    ((equal n 0) 1)
    ((equal n 1) 1)
    (t (times n (factorial (difference n 1))))))

% Test the factorial function
(prin2 "Factorial of 5: ")
(prin2 (factorial 5))
(terpri)

(prin2 "Factorial of 10: ")
(prin2 (factorial 10))
(terpri)

Contribute — propose a file extension

Tell us where to find evidence about Portable Standard Lisp (mapped to pl/portable-standard-lisp). 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/Portable Standard Lisp/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)