import std;

public import std.typecons : Nullable;

import std.typecons : Nullable;

​

alias T = Nullable!int;

​

void fails()

{

    pragma(msg, isInstanceOf!(Nullable, T));

}

​

void passes()

{

    import std.typecons : Nullable;

    pragma(msg, isInstanceOf!(Nullable, T));

}

​

void main(){}