2009/3/5 Simon Peyton-Jones :
I think that suffers from the same lack-of-memoisation as (A).
>
> After all, each recursive call is to (opF_aux d_a), and each such call builds
> a new d_as.
Thats why I mentioned CSE at the end of my email:
"""
To prevent reconstruction of the dictionary in gener
| Might this be another option? Desugar the instance as:
|
| {{{
| Rec {
| dCList :: C a -> C [a]
| dCList d_a = letrec {
| d_as = DC opfl opgl
| opfl = opF_aux d_a
| opgl = $dmopG d_as
|} in d_as
|
| opF_aux :: C a -> a -> In
2009/3/5 Simon Peyton-Jones :
> Guys
>
> I've been struggling with how to desugar instance declarations for some time.
> It's been going round and round in my head, but without reaching a fixed
> point. Ganesh's message (below) made me realise an additional problem with
> the current "solution
Guys
I've been struggling with how to desugar instance declarations for some time.
It's been going round and round in my head, but without reaching a fixed point.
Ganesh's message (below) made me realise an additional problem with the
current "solution".
So I thought I'd take an hour to arti
