package reason

  1. Overview
  2. Docs
Reason: Syntax & Toolchain for OCaml

Install 

dune-project
 Dependency

reasonml.github.io Readme Changelog Edit opam file Versions (19)

Authors

  1. J
    Jordan Walke <jordojw@gmail.com>

Maintainers

  1. J
    Jordan Walke <jordojw@gmail.com>
  2. A
    Antonio Nuno Monteiro <anmonteiro@gmail.com>

Sources

reason-3.17.3.tbz
sha256=01c4591b8213ad8c71b6e9f1d180eabd200d441936ee27fe9f99646b75f9865c
sha512=f167097b3254fbf400bb816275f84157a0a9c691ebc877861e80b1c32c7e2ebc553e0a6a0ef073ec89c2c20ce80c42959dc89811e49712edd0c1fe6dce4a90e9

Description

Reason gives OCaml a new syntax that is remniscient of languages like JavaScript. It's also the umbrella project for a set of tools for the OCaml & JavaScript ecosystem.

Published: 22 Jan 2026

README

logo

Reason

Simple, fast & type safe code that leverages the JavaScript & OCaml ecosystems.

Build Status CircleCI Chat

Latest Releases:

native esy package on npm

User Documentation

The Reason user docs live online at https://reasonml.github.io. The repo for those Reason docs lives at github.com/reasonml/reasonml.github.io

Docs links for new users:

Contributing:

npm install -g esy@next
git clone https://github.com/facebook/reason.git
cd reason
esy
esy test # Run the tests

Contributor Documentation:

The docs/ directory in this repo contains documentation for contributors to Reason itself (this repo).

License

See Reason license in LICENSE.txt.

Works that are forked from other projects are under their original licenses.

Credit

The general structure of refmt repo was copied from whitequark's m17n project, including parts of the README that instruct how to use this with the OPAM toolchain. Thank you OCaml!

Dependencies (10)

  1. ppxlib >= "0.36"
  2. cppo
  3. fix
  4. merlin-extend >= "0.6.2"
  5. menhir >= "20180523"
  6. dune-build-info >= "2.9.3"
  7. cmdliner >= "1.1.0"
  8. ocamlfind build
  9. ocaml >= "4.08" & < "5.5"
  10. dune >= "3.18"

Dev Dependencies (1)

  1. odoc with-doc

Conflicts

None