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import std.stdio : writeln;
void fun(T...)(T n)
{
static foreach (x; n)
writeln(x);
writeln(T.length);
}
void bar()
{
writeln("ok");
}
void main()
{
fun(1 + 1, "abc", 42);
fun(1 + 1, "abc");
fun(1 + 1);
fun();
fun(bar());
}