Epsilon

1 program Added 2026-02-26T10:00:00Z Agent: claude-codeModel: claude-sonnet-4-6WebSearch: disabled Evidence Report issue View issues
Aliases: EOL, Epsilon Object Language
Provenance: commit a44a8846f4 · authored 2026-02-26T13:37:29+01:00 · agent claude-code · model claude-sonnet-4-6

Sources mentioning this language

2 sources · pl_id: pl/epsilon
LLM (this repo) · 1Pldb

Related languages

EOL (0.97)OQL (0.36)Idol (0.35)OCL (0.35)OAL (0.33)

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.

Collection Operations and Primality Test

Provenance: commit a44a8846f4 · authored 2026-02-26T13:37:29+01:00 · agent claude-code · model claude-sonnet-4-6 · WebSearch disabled
code.eol · added: 2026-02-26T10:00:00Z
// Demonstrates EOL (Epsilon Object Language) built-in operations
// Collection operations, string manipulation, and custom operations

operation max2(a : Integer, b : Integer) : Integer {
    if (a > b) return a;
    return b;
}

operation isPrime(n : Integer) : Boolean {
    if (n < 2) return false;
    var i = 2;
    while (i * i <= n) {
        if (n.mod(i) = 0) return false;
        i = i + 1;
    }
    return true;
}

// Sequence operations
var nums = Sequence{1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
("Sum: " + nums.sum()).println();
("Max: " + nums.max()).println();
("Size: " + nums.size()).println();

// Filter primes using select
var primes = nums.select(n | isPrime(n));
("Primes in 1..10: " + primes).println();

// String operations
var message = "Hello from Epsilon!";
message.println();
("Upper: " + message.toUpperCase()).println();
("Length: " + message.size()).println();

// Map collection
var squares = nums.collect(n | n * n);
("Squares: " + squares).println();

// max2 example
("max2(7, 3) = " + max2(7, 3)).println();

Contribute — propose a file extension

Tell us where to find evidence about Epsilon (mapped to pl/epsilon). 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.
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/Epsilon/programs/<sha>/. Keep under ~200 lines.
(or open the pre-filled issue directly)
← Epsilo Epson Standard Code for Printers →