tango list

[Bill Baxter]

Robert Fraser wrote:
> Christopher Wright wrote:
>> quest wrote:
>>> hi,
>>>
>>> i would like to hand over some LinkSeq list to some funktions. what 
>>> would be function header??
>>>
>>>
>>> void testfunc(???? lists, int bolony) { ....  }
>>>
>>> seems like i can't use LinkSeq for the ????.
>>
>> // Use a list of any type of element
>> void testfunc(T)(ListSeq!(T) list, int bologna) {}
>>
>> Unfortunately, you won't be able to put that in an interface.
> 
> Why not?
> 
> interface ResultCollector
> {
>     void notify(Result r);
>     void notify(Seq!(Result) results);
>     Seq!(Result) getResults();
> }

You can't put a template in an interface, just a particular 
instantiation of one, as you've done there.  Try it with

        void notify(Result)(Seq!(Result) results);

I'm not sure if it's even possible to make that work.  It basically says 
the interface contains a family of functions and you aren't sure which 
ones yet.

'Course you *can* make a templated interface:

interface ResultCollector(Result)
{
     void notify(Result r);
     void notify(Seq!(Result) results);
     Seq!(Result) getResults();
}


--bb