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
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