I saw on another list (Stack Overflow) a comment that Racket letrec was equivalent to R5RS and R6RS letrec*, but when I checked the Racket reference manual section 2.9 I didn't see any mention of strict left to right evaluation. --------------------------------------------- (letrec ([id val-expr] ...) body ...+)
Similar to let, but the locations for all ids are created first and filled with #<undefined>, and all ids are bound in all val-exprs as well as the bodys. The ids must be distinct according to bound-identifier=?. ------------------------------------------- 1.) Can someone verify for me whether Racket letrec is equivalent to RnRS letrec* or to RnRS letrec. 2) Also how in Racket do you set an id to #<undefined> . I was unable to find an (undefined) function returning #<undefined> similar to (void) returning #<void> . Thanks, Harry Spier _________________________________________________ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/users
