== Quote from bearophile (bearophileh...@lycos.com)'s article > Heromyth: > > I have defined a opCmp function to overload comparison operators, then how > > can > > I use it correctly? > I don't have an answer yet, but I suggest you to look at the D docs that describe how to use opCmp. Probably you need to accept a const Object, and to use override. I suggest to strip your code from all the not essential things, so you will see the problems better. > Bye, > bearophile
I tested public override int opCmp(Object o) and got the same result. The D document suggests rewriting a < b into a.opCmp(b) < 0 While doing code porting from C# to D, I wander if I can directly use the comparing operation between two class object. Maybe the compiler should give some messages for not using "a < b". Is it a compiler bug? Can anyone give some suggertion. It will be well grateful.