On 03/06/2012 08:37 PM, H. S. Teoh wrote:
On Tue, Mar 06, 2012 at 01:51:51AM +0100, Artur Skawina wrote: [...]class A { string prop1; int prop2;void serialize(this THIS)() { __serialize(cast(THIS*)&this); } } void __serialize(T)(T* obj) { writef("%s {\n", typeid(*obj)); foreach (name; __traits(allMembers, T)) { static if (__traits(compiles,&__traits(getMember,obj,name))) { alias typeof(__traits(getMember,obj,name)) MT; static if (is(MT==function)) continue; else { auto m = __traits(getMember,obj,name); if (is(MT:const(char[]))) writef(" %s %s = \"%s\";\n", typeid(MT), name, m); else writef(" %s %s = %s;\n", typeid(MT), name, m); } } } writef("}\n"); } And it will do the right thing for derived classes too.[...] Hmm, it only does the right thing for derived class if invoked with the derived class pointer. It doesn't work (and in retrospect can't possibly work, since "this THIS" is a compile-time parameter) if you only have the base class pointer. What I needed was for serialize() to be polymorphic at runtime, so it does have to be overloaded in every derived class. Hmph... looks like I can't avoid using mixins. :-( T
Yes, I think this is quite a common need. Maybe some feature should be added that allows the base class to automatically mixin stuff into all derived classes.
