import std;

struct Box(T)
{
    T thing;

    this(T newThing)
    {
        thing = newThing;
    }
}

void main()
{
    Box!int someInt = Box!int(5);
    Box!string someString = Box!string("flerrp");
    Box!bool someBool = Box!bool(true);

    static if (__traits(compiles, someInt.thing + 1))
    {
        writeln(someInt.thing + 5);
    }
    else static if (__traits(compiles, someString.thing ~= "asdf"))
    {
        someString.thing ~= " flirrp";
        writeln(someString.thing);
    }
    else static if (__traits(compiles, someBool.thing = false))
    {
        someBool.thing = false;
    }
}