[Issue 1839] Give D a modern varargs system that allows forwarding

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=1839





------- Comment #6 from andrei at metalanguage.com  2008-02-15 02:47 -------
(In reply to comment #5)
> If (...) functions go away, then yes, this bug report becomes pointless.  The
> template versions of forwarding will do the trick.
> 
> But how do I create a delegate that takes an arbitrary list of arbitrary
> arguments using templates?
> 

import std.stdio;

void before() {}
void after() {}

void forward(F, T...)(F fun, T args)
{
    before();
    scope(exit) after();
    fun(args);
}

void main()
{
    forward((int a) { writeln(a + 40); }, 2);
}


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