Hazel - Programming language

Hazel is an open source programming language created in 2016 by Cyrus Omar.

#538on PLDB

10Years Old

Download source code:

git clone https://github.com/hazelgrove/hazel

A screenshot of the programming language Hazel.

Hazel is a live functional programming environment organized around typed holes. Hazel is a live functional programming environment that is able to typecheck, manipulate, and even run incomplete programs, i.e. programs with holes. There are no meaningless editor states.

Tags: programming language, visual programming language
Hazel is developed on GitHub and has 724 stars
Early development of Hazel happened in University of Michigan
Hazel compiles to JavaScript
Hazel is written in Reason, Markdown, OCaml, CSS, Tex, YAML, Make, HTML, SVG
hazel.org was registered in 1997

Example from the web:

let v = {} in
v : num

Language features

Feature	Supported	Example	Token
Typed Holes	✓