Safer casts

[Janice Caron]

On 11/05/2008, Yigal Chripun <yigal100 at gmail.com> wrote:
> your reply is correct but it is misleading.

Whose reply? What is this a reply to?

You might want to continue replying point-by-point. It makes things a
lot easier to follow.


>  you are correct in saying that there is only one mysort function

Who said that, and in what context?


>  but
>  every time you call it with a different comp delegate it needs to have a
>  different sort instance.

OK, I see what you're saying. If I do

    sort!(English)(text);
    sort!(Czech)(text);

then I do indeed get two instantiations (which presumably will sort
text alphabetically by English and Czech rules respectively).

HOWEVER. If I write

    void mysort(T)(T[] array, int delegate(T,T) compare)
    {
        sort!(compare)(array);
    }

then I have implemented your desired solution, trivially. And now I can call

    mysort(array,English);
    mysort(array,Check);

and still there's only one instantiation of sort. It's exactly what
Dee's been saying all along. You can make dynamic from static, but you
can't make static from dynamic.