invariant

Hi all, i want to declare an invariant interger, for instance "invariant int x = 3;". But i've got this error while compiling. Error: constant 3 is not an lvalue could someone explain me what's wrong here ? I'm using dmd 2.030

Comparable Type

Hi, can someone tell me how can i check whether a type is comparable ? Is there something like "IComparable" in C# ?