XL - Programming language

XL is an open source programming language created in 2000 by Christophe de Dinechin.

#481on PLDB

24Years Old

Download source code:

git clone https://github.com/c3d/xl

XL ("eXtensible Language") is the first and so far the only computer programming language designed to support concept programming.XL features programmer-reconfigurable syntax and semantics. Compiler plug-ins can be used to add new features to the language. A base set of plug-ins implements a relatively standard imperative language. Read more on Wikipedia...

Tags: programming language
XL is developed on GitHub and has 269 stars
XL is written in CSS, C++, Make, YAML, Bash, Markdown, Lisp, awk, HTML, AsciiDoc, Python, Ini, JavaScript
See also: (10 related languages) Ada, BASIC, C, Fortran, Java, Lisp, Prolog, Visual Basic, Smalltalk, Forth
Read more about XL on the web: 1.
1 PLDB concepts link to XL: tao3d

Example from the web:

0! is 1
N! is N * (N-1)!

for I in 1..5 loop
    print "The factorial of ", I, " is ", I!

Example from hello-world:

// XL programming language: http://xlr.sourceforge.net
writeln "Hello World"

Example from Wikipedia:

if true then TrueBody else FalseBody -> TrueBody
  if false then TrueBody else FalseBody -> FalseBody

Language features

Feature	Supported	Example	Token
Booleans	✓		True False
Strings	✓	"Hello world"	"
Print() Debugging	✓		writeln
Templates	✓
Semantic Indentation	✓