[nem-en] Re: match on specific parameter

[Michal Moskal]

Some more thoughts:

On 1/29/06, Michal Moskal <michal.moskal at gmail.com> wrote:
> But I personally don't find it very readable. I would like something
> like:
>
> def rev (acc, match lst)
>   | x :: xs => rev (x :: acc, xs)
>   | [] => acc
>
> or maybe "def rev (acc, match)". I'm not sure about the syntax.

Maybe we could use default parameters as a hint:

def rev (lst, acc = [])
   | x :: xs => ...

This however changes semantics of already existing code (I agree, that
probably not very common).

> What do you think?
>
> On a related note, d proposed on IRC, that we could transform:
>
> foo () : ...
>   | ...
>
> inside classes and variants to:
>
> foo () : ...
>   match (this)
>     | ...
>
> which I think also makes sense.

Maybe it should be also possible to say:

foo (match this, some_flag : bool)
  | ...

--
   Michal Moskal,
   http://nemerle.org/~malekith/