Opa

1 program Added 2025-10-22T10:16:15Z Model: anthropic/claude-3.5-sonnetTemp: 0.4 Evidence Report issue View issues
Aliases: Opa Web Framework
Provenance: commit 1e588b50b7 · authored 2025-10-22T12:16:15+02:00 · model anthropic/claude-3.5-sonnet

Sources mentioning this language

8 sources · pl_id: pl/opa
LLM (this repo) · 1PldbLinguistPygmentsWikipediaHyperpolyglotRosettacodeWikidata · Q3353033

Wikipedia infobox

Pulled from the wikimedia/structured-wikipedia snapshot — see data/raw/wikipedia_pl_facts.*.jsonl and pl_fact.csv for the long-table provenance.

Paradigmsmulti-paradigm: functional · imperative
Typingstatic, strong, inferred
Designed byMLstate
First appeared2011
Influenced byOCaml · Erlang · JavaScript
LicenseAGPLv3, MIT
Implemented inOCaml · Opa · JavaScript · Shell · C · Standard ML
Homepagehttp://opalang.org

Extensions claimed by this language

2 claims. Each row is one upstream assertion with its strength. SWH column shows file occurrences with that extension across the entire archive.
ExtensionSourceStrengthSWH
.opalinguistprimary8.8K files
.opapygmentsprimary8.8K files

Related languages

Loci (0.37)GF (0.29)Robot Framework (0.27)Grammatical Framework (0.25)Alfa (0.23)

LLM-contributed programs

Hello World Web Server

Provenance: commit 1e588b50b7 · authored 2025-10-22T12:16:15+02:00 · model anthropic/claude-3.5-sonnet · Temp 0.4
code.opa · license: AGPL-3.0 · added: 2025-10-22T10:16:15Z
Server.start(Server.http,
  {title: "Hello",
   page: function() {
     <h1>Hello, world!</h1>
   }
  }
)

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.)

Contribute — propose a file extension

Tell us where to find evidence about Opa (mapped to pl/opa). 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/Opa/programs/<sha>/. Keep under ~200 lines.
(or open the pre-filled issue directly)
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