Felix - Programming language

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Felix is a programming language created in 2001 by John Skaller.

#361on PLDB

23Years Old

Download source code:

git clone https://github.com/felix-lang/felix

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The Felix Programming Language

Tags: programming language
Felix is developed on GitHub and has 799 stars
Early development of Felix happened in felix-language@googlegroups.com
Felix is written in OCaml, reStructuredText, Python, C, C++, Make, HTML, Tex, Bourne shell, Elixir, SVG, Markdown, Haskell, YAML, Vim script, XML, Scala, Java, Perl, Ada, CSS, Pascal, Lisp, M4, XHTML, Clojure, Objective-C, Bash, Nix
Pygments supports syntax highlighting for Felix
Read more about Felix on the web: 1.

Example from the web:

#import <flx.flxh>
fun abs_div(a:int, b:int when b!=0)
  expect result >=0
=>
  abs(a/b)
;
print (abs_div(2,4)); print "\n";

Example from hello-world:

println$ "Hello World";

Felix Keywords

_ _deref all as assert attempt call callback case caseno cclass code compound ctypes do done downto elif else endattempt endcase endif endmatch enum except exceptions expect finally for forall forget fork functor goto ident if incomplete inherit instance interface jump lambda loop match module namespace new noexpand nonterm obj of open parse raise regexp reglex regmatch rename return the then to type typecase typedef typematch typeof upto when whilst with yield

Language features

Feature	Supported	Example	Token
Binary Literals	✓	// 0[Bb][01_]+([tTsSiIlLvV]\|ll\|LL\|([iIuU])(8\|16\|32\|64))?
Integers	✓	// (0\|[1-9][0-9_]*)([tTsSiIlLvV]\|ll\|LL\|([iIuU])(8\|16\|32\|64))?
Floats	✓	// 0[xX]([0-9a-fA-F_]*\.[0-9a-fA-F_]+\|[0-9a-fA-F_]+)[pP][+\-]?[0-9_]+[lLfFdD]?
Hexadecimals	✓	// 0[xX][0-9a-fA-F_]+([tTsSiIlLvV]\|ll\|LL\|([iIuU])(8\|16\|32\|64))?
Octals	✓	// 0[0-7_]+([tTsSiIlLvV]\|ll\|LL\|([iIuU])(8\|16\|32\|64))?
Conditionals	✓
Strings	✓	"Hello world"	"
Print() Debugging	✓		println
Comments	✓	// A comment
Line Comments	✓	// A comment	//
Pattern Matching	✓	match x with \| Some x => println$ x; \| None => println "NONE"; endmatch;
Polymorphism	✓	// overloads fun f (x:double) => x +42.1; fun f (x:int) => x + 1; fun f (x:string) => x + "!";
Generics	✓	// generics fun g (x) => f (f x); println$ g 1, g "hello"; println$ _map f (1,"hello",2.0);
Pointers	✓	var x = 1; &x <- 2;
Semantic Indentation	X

HackerNews discussions of Felix

title	date	score	comments
Felix - a fast scripting language	01/04/2013	107	83