import std.stdio; struct Foo { this(int) {} ~this() {} } struct Bar { this(this) { writefln("Bar.this(this): %X", &this); } this(Foo, Foo) { writefln("Bar.this(int): %X", &this); } ~this() { writefln("Bar.~this(): %X", &this); } } void fun(Bar n) { writefln("fun: %X", &n); } void main() { Foo foo; fun(Bar(foo, Foo(0))); }