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parenscript (UnCommon Web module)
Created by stuart on: Fri, 03 Mar 2006 01:55:31 GMT, Last modification: Fri, 13 Jul 2007 16:50:48 GMT

Translates a subset of Common Lisp into JavaScript.

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Version	0.1.0 -
Maturity	Beta
OS compatibility
ASDF installable	No
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Source code repository	http://common-lisp.net/project/ucw/repos/parenscript/

Parenscript, originally, written by Manuel Odendahl, has now been incorporated into UnCommon Web, which seems to be the source for information and new releases.

It is a "compiler" that transforms Common Lisp into JavaScript. Or, seen another way, it is an S-expression syntax for JavaScript.

To quote the author's initial blog announcement, the following code:

(defun apply-effect () 
   (when (and document.all photoslider.filters) 
      (let ((trans photoslider.filters.reveal-trans)) 
          (setf (slot-value trans *Transition) 
                (floor (* (random) 23))) 
          (trans.stop) 
          (trans.apply))))

generates JavaScript like this:

function applyEffect() { 
   if (document.all && photoslider.filters) { 
      var trans = photoslider.filters.revealTrans; 
      trans.Transition = Math.floor(Math.random() * 23); 
      trans.stop(); 
      trans.apply(); 
   } 
}

From the feature list:

• Supports all the expressions and statements of EcmaScript 262
• Converts Lisp symbols to java-style camelcase (taken from linj)
• Lisp-style iteration with DO, DOTIMES, DOEACH, DOLIST
• Complete macro environment with MACROLET, SYMBOL-MACROLET
• Uses the Lisp reader for reader macros
• ParenScript HTML generator for embedding HTML in JavaScript code (not more ugly document.writes)
• Allows for recursive compilation of ParenScript (generate Javascript in Javascript in Javascript...)
• Lispy CSS syntax

Required by these libraries

UCW+ | Wispy Lisp

Authors and Maintainers

Marco Baringer | Manuel Odendahl

Tags

Javascript | HTML | BSD license | Libraries

See Also

UnCommon Web

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