Re: [Chicken-users] Compiler inlining

[felix winkelmann]

On 10/23/06, John Cowan <address@hidden> wrote:
> I understand that part now.  I'm really more interested in getting
> the compiler to inline my modified definition:
>
> (define basic-cdr cdr)
> (define (cdr x)
>      (cond
>            (null? x) x)
>            (pair? x) (basic-cdr x))
>            (symbol? x) (val (##sys#slot sym 2)))))
>
> and similarly for "car" except without the symbol support.

You could use "define-inline" (but be careful of recursion,
i.e. expand into a lower-level version of "cdr", if you need
the original one, just like you to above). Unfortunately syntax-case
can't handle "define-inline" (treats it like "define") and you
have to use "include" to import the inline-definitions.

Alternatively, if you are more adventerous, you can use the
codewalk egg to perform arbitrary transformations on your code
or even write compiler-rewriting rules (which is somewhat more
involved).


cheers,
felix

--
http://galinha.ucpel.tche.br:8081/blog/blog.ssp