[Issue 2599] Two variadic parameters should be accepted

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=2599





------- Comment #2 from andrei at metalanguage.com  2009-01-24 08:45 -------
(In reply to comment #1)
> How would you use such a thing?
> 
> The trouble is that F!(int, char[], Object) in itself is ambiguous - does T1
> bind to int and T2 to (char[], Object), or T1 to (int, char[]) and T2 to
> Object?  Even one to the empty tuple and the the other to the whole thing? 
> F!(int, char[], Object) would effectively have to be an internal, intermediate
> template with the point of division as a parameter.
> 
> If you try to call the whole thing using IFTI, it's still ambiguous - what will
> T1 bind to?
> 
> Maybe it could be made to work, if the compiler can be made to try to match
> templates before expanding symbolic tuples under suitable conditions.
> 

When instantiated explicitly, all explicit arguments are eaten by T1. This is
the purpose of the pattern: pass some explicit arguments, then deduce some more
implicitly. Currently this is possible, but only with one ellipsis.


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