https://issues.dlang.org/show_bug.cgi?id=17440
hst...@quickfur.ath.cx changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |hst...@quickfur.ath.cx --- Comment #9 from hst...@quickfur.ath.cx --- But by-reference objects in D *already* have nullable semantics, i.e.: ------- class C {} C c; assert(c is null); // c is null by default c = new C; assert(c !is null); c = null; // nullify assert(c is null); ------- Of course the syntax is slightly different (direct use of null vs. .isNull / .nullify). But there's really no benefit to using Nullable with reference types in D. OTOH, if you're using generic code that expect a single API for nullable objects, perhaps the solution is to write an overload of Nullable that simply maps .isNull to `is null` and .nullify to `= null` when the wrapped type is a class. --