I actually have a lot of real work to do, so I had to quit my “opensource-programming” procrastination as fast as possible. That’s why I rushed the release of my Lisp to Javascript “compiler” ParenScript. Compiler is actually a very big word, as ParenScript doesn’t do much more than correctly indent a Lisp expression representing Javascript code (it does a few optimization on the way, though). I had at first written a very hackish implementation of the compiler, with an undefinite intermediary representation somehow consisting of strings and lists of strings. After I got the mess working, I decided to rewrite the compiler in a clean way. ParenScript in the version 0.1.0 actually is a lot cleaner, a few people may even understand its inner workings, but there still is a lot to do. It has been given next to none testing in a real setup. The indentation is a bit weird sometimes, and could be given a lift up. The error handling is very minimal.<\/p>\n
However, as rushed as I was to release ParenScript, I put the whole day into its manual, and I think it has turned out to be quite nice. Here is the ParenScript webpage<\/a>, the software<\/a>, the manual<\/a> and the language reference<\/a>. ParenScript it also installable using ASDF-INSTALL, just type<\/p>\n and it should install fine.<\/p>\n To give you a little idea of what ParenScript does, here is a ParenScript program and the generated JavaScript:<\/p>\n The generated JavaScript code looks like this:<\/p>\n From the feature list:<\/p>\n UPDATE: I’ve blogged about the javascript compiler before. In english here: javascript experiences<\/a>, and in german here: lisp to CSS<\/a>, javascript, so eine geile sprache<\/a>, javascript expressions<\/a> , javascript compiler<\/a> and lisp to javascript<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":" I actually have a lot of real work to do, so I had to quit my “opensource-programming” procrastination as fast as possible. That’s why I rushed the release of my Lisp to Javascript “compiler” ParenScript. Compiler is actually a very … Continue reading (asdf-install:install 'parenscript)<\/pre>\n
\n(defun apply-effect () \n (when (and document.all photoslider.filters) \n (let ((trans photoslider.filters.reveal-trans)) \n (setf (slot-value trans ’*Transition) \n (floor (* (random) 23))) \n (trans.stop) \n (trans.apply))))\n<\/pre>\n
\nfunction applyEffect() { \n if (document.all && photoslider.filters) { \n var trans = photoslider.filters.revealTrans; \n trans.Transition = Math.floor(Math.random() * 23); \n trans.stop(); \n trans.apply(); \n } \n} \n<\/pre>\n\n