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. Vladimir 2010/8/18 Red Daly <reddaly@gmail.com>:

I have added a Common Lisp-like condition system to the Parenscript Object System (PSOS).  Parenscript now has HANDLER-BIND, HANDLER-CASE, RESTART-CASE, RESTART-BIND, INVOKE-RESTART, and SIGNAL.

The patch that adds this is here: http://github.com/gonzojive/paren-psos/commit/6578ad223515dc2c1ddf49346f4baf... 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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