[Openmcl-devel] defsetf question

bryan o'connor bryan-openmcl at lunch.org
Thu Jan 20 23:52:50 UTC 2005


the spec says that the long form of defsetf encloses the body
in a block named after the access function.

i think openmcl is doing the wrong thing and putting the block
around the eventual setf-expansion instead of the body that's
evaluated to generate the setf-expansion.

i wanted to make sure i was interpreting the spec correctly before
changing it.

an example:

? (defsetf foo (x) (y) (return-from foo `(setf (car ,x) ,y)))
 > Error in process listener(1): While compiling an anonymous function :
 >                               Can't RETURN-FROM block : FOO.

? (defsetf foo (x) (y) `(return-from foo (setf (car ,x) ,y)))
FOO
? (get-setf-expansion '(foo x))
(#:G73)
(X)
(#:G72)
((LAMBDA (#:X) (BLOCK FOO (RETURN-FROM FOO (SETF (CAR #:X) #:G72)))) 
#:G73)
(FOO #:G73)


thanks,
	...bryan




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