Re: [Caml-list] let rec

[Mike Potanin <potanin@mccme.ru>]

On Wed, 15 Jan 2003, Vitaly Lugovsky wrote:

>  It's not so funny. Why I can't write it using let rec:
>
>     let rec f (il,al,ht) =
>       let il2 = Array.make (n2+1) Lnil in
>       acopy il il2;
>       Array.iteri (fun i x -> il2.(all.(i)) <- x) al;
>       xprs (il2,anul,ht)
>     and xprs =
>       (Hashtbl.replace ht name (CTfun(f));
>        compile_exprs env2 exprs) in
>     f
>
>  Sure, let rec construction should be much less restrictive.
The similar problem arises in a case
let ring l = let rec r = l@r in r
OCaml type system can not understand that the design is safe.
>
>  And, another one question: does ocaml compiler really eliminates
> unused variables from the closure environment?
>
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