import std.stdio;

​

struct Outer(T) {}

struct Inner(T) {}

​

void fun(T)(Outer!(Inner!T) arg) { writeln("Outer!(Inner!T)"); }

void fun(T)(Outer!T arg) { writeln("Outer!T"); }

​

void main() {

    Outer!(Inner!int) x;

    fun(x);

}