Another interesting hack: expand a static array into parameter arguments

[Andrej Mitrovic]

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import std.stdio;
import std.typetuple;

auto Delay(alias arg, size_t idx)() { return arg[idx]; }

template expand(alias args, size_t idx = 0)
{
     alias Args = typeof(args);

     static if (is(Args : C[N], C, size_t N))
     {
         static if (idx < (N - 1))
             alias expand = TypeTuple!(Delay!(args, idx),
                                       expand!(args, idx + 1));
         else
             alias expand = Delay!(args, N - 1);
     }
}

void foo(int a, int b, int c)
{
     writefln("a: %s, b: %s, c: %s", a, b, c);
}

void main()
{
     int[3] arr = [1, 2, 3];
     foo(expand!arr);
}
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