[parenscript-devel] Parenscript condition system implemented for PSOS

Vladimir Sedach vsedach at gmail.com
Fri Oct 1 21:16:03 UTC 2010

I just read the code now (yeah, it takes me a couple of months to do
things), and WOW. I didn't know the CL condition system could be
implemented so simply out of weaker primitives, and I didn't realize
that the CL condition system is actually as simple as it is! All the
CLHS and tutorial descriptions make it sound a lot more complicated.

Red, I like your implementation.

And just to state the apparent: dynamic scoping FTW.


2010/8/18 Red Daly <reddaly at gmail.com>:
> I have added a Common Lisp-like condition system to the Parenscript
> Object System (PSOS).  Parenscript now has HANDLER-BIND, HANDLER-CASE,
> The patch that adds this is here:
> http://github.com/gonzojive/paren-psos/commit/6578ad223515dc2c1ddf49346f4baf7c3bee37c4
> and totals about 200 lines, plus 200 lines of test cases.  It could
> probably work without a type system at all, but it will require some
> runtime code no matter what.
> The whole PSOS system is backed by a test suite that uses
> CL-Spidermonkey. Take a look at PSOS here:
> http://github.com/gonzojive/paren-psos for more details.
> Enjoy!
> Red
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