method() {do something}The idea is to turn the block into a closure pmc. The problem is how to pass this to the method, so that it knows that it's a special block parameter. Particularly in a way so that a language which doesn't know about blocks can still call Ruby code.
On the Cardinal mailing list Dan Sugalski mentioned the possibility of having a special block parameter. For Ruby use this would be perfect.
The downside is that AFAICT it'd only be used by Ruby code. I'm not sure it's a good idea to modify the calling conventions for the benefit of just one user language.
-- Mark Sparshatt
