Hy - Programming language

Hy is an open source programming language created in 2013 by Paul Tagliamonte.

#148on PLDB

11Years Old

398Repos

Download source code:

git clone https://github.com/hylang/hy

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Hy (alternately, Hylang) is a programming language, a dialect of the language Lisp designed to interact with the language Python by translating expressions into Python's abstract syntax tree (AST). Hy was introduced at Python Conference (PyCon) 2013 by Paul Tagliamonte.Similar to Kawa's and Clojure's mapping of s-expressions onto the Java virtual machine (JVM), Hy is meant to operate as a transparent Lisp front end to Python's abstract syntax. Lisp allows operating on code as data (metaprogramming). Read more on Wikipedia...

Tags: programming language
Hy is developed on GitHub and has 4,818 stars
There are at least 398 Hy repos on GitHub
Early development of Hy happened in https://github.com/hylang
Hy is written in Python, reStructuredText, SVG, YAML, Markdown, CSS, Dockerfile
The Google BigQuery Public Dataset GitHub snapshot shows 154 users using Hy in 180 repos on GitHub
Explore Hy snippets on Rosetta Code
Pygments supports syntax highlighting for Hy
GitHub supports syntax highlighting for Hy
PLDB has 2 Jupyter Kernels for Hy: github.com, github.com
hylang.org was registered in 2013
See also: (5 related languages) Lisp, IA-32, Clojure, Python, JVM

Example from the web:

(+ "Hyllo " "World" "!")

Example from Riju:

(print "Hello, world!")

Example from hello-world:

(print "Hello World")

Example from Linguist:

;; Fibonacci example in Hy.

(defn fib [n]
  (if (<= n 2) n
      (+ (fib (- n 1)) (fib (- n 2)))))

(if (= __name__ "__main__")
  (for [x [1 2 3 4 5 6 7 8]]
    (print (fib x))))

Example from Wikipedia:

=> (print "Hy!")
Hy!
=> (defn salutationsnm [name] (print (+ "Hy " name "!")))
=> (salutationsnm "YourName")
Hy YourName!

Language features

Feature	Supported	Example	Token
MultiLine Comments	✓
Integers	✓	; -?\d+
Floats	✓	; -?\d+\.\d+
Hexadecimals	✓	; 0[xX][a-fA-F0-9]+
Octals	✓	; 0[0-7]+j?
Strings	✓	"Hello world"	"
Print() Debugging	✓		print
Comments	✓	; A comment
Line Comments	✓	; A comment	;
Semantic Indentation	X