Eff
1 program
Added 2026-02-05T12:00:00Z
Agent: claude-codeModel: sonnetWebSearch: disabled
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Provenance: commit 50a6c502af · authored 2026-02-05T23:46:15+01:00 · agent claude-code · model sonnet
Sources mentioning this language
4 sources · pl_id:
pl/effWikipedia infobox ↗
Pulled from the
wikimedia/structured-wikipedia
snapshot — see data/raw/wikipedia_pl_facts.*.jsonl and
pl_fact.csv for the long-table provenance.
| Paradigms | multi-paradigm: functional · imperative |
|---|---|
| Designed by | Andrej Bauer · Matija Pretnar |
| First appeared | 2012 |
| Influenced by | OCaml |
| License | BSD 2-clause |
| Implemented in | OCaml |
| Homepage | http://www.eff-lang.org |
Related languages
Effekt (0.12)
LLM-contributed programs
Fibonacci Calculator
Provenance: commit 50a6c502af · authored 2026-02-05T23:46:15+01:00 · agent claude-code · model sonnet · WebSearch disabled
(* Fibonacci with state effect *)
effect State : int -> int
let rec fib n =
if n <= 1 then n
else fib (n - 1) + fib (n - 2)
let main () =
let result = fib 10 in
print_endline (string_of_int result)
main ()
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.)