On Wed, Mar 23, 2011 at 00:49, Nadeem Abdul Hamid <nad...@acm.org> wrote: > Is there anything like struct-copy that works to functionally update a > field value in a structure, where the field happens to be defined in > the super-type? In the example below, I want to "functionally update" > a field of the sub structure inherited from the base definition... > > > (struct base (a b) #:transparent) > (struct sub base (c) #:transparent) > > (define S (sub 1 2 3)) > > (struct-copy sub S [c 4]) ; works > ; doesn't work: (struct-copy sub S [b 4]) > (struct-copy base S [b 4]) ; produces a base, not sub
No answers? it looks to me that (struct-copy sub S [b 4]) should work, but it doesn't. Isn't this a bug? If it is not considered a bug, maybe the docs need a clarification? Cheers P. _________________________________________________ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/users
