More interesting details here: http://thirdcog.eu/pwcblocks/ http://thirdcog.eu/pwcblocks/ You get read-only access to stack variables, read-write access to st

More interesting details here: http://thirdcog.eu/pwcblocks/ http://thirdcog.eu/pwcblocks/ You get read-only access to stack variables, read-write access to stack variables defined with __block, and you have to copy the block explicitly to the heap if you want to call it outside of its scope, and then manually free it.