On 30.10.2015 20:10, leledumbo wrote:
Consider the following:type generic TGenClass<T> = class ... end; TSpecType = specialize TGenClass<Integer>; TMyClass = class FST: TSpecType; procedure p; published ST: TSpecType read FST write FST; end; procedure TMyClass.p; ... begin PropCount := GetPropList(Self,Props); for i := 0 to PropCount - 1 do begin Prop := Props^[i]; PropName := Prop^.Name; case Prop^.PropType^.Kind of tkObject: begin Obj := GetObjectProp(Self,Prop); //1 ... end; end; end; end; In //1, GetObjectProp will return TObject for ST property. Since generic types without specialization cannot be used in type declaration, how can I get the actual type of ST and cast Obj to it so I can access its properties? Note that ST here is just an example, there could be multiple TGenClass specialization that TMyClass uses.
TGenClass<> is not a full type, only TGenClass<Integer> is, so you need to use - in your example - TSpecType(Obj). In Delphi mode you could also use TGenClass<Integer>(Obj). For mode ObjFPC you'll need to wait till I've finished generic functions, cause then "specialize TGenClass<Integer>(Obj)" will work as well. Note: specializations can also be declared locally in a procedure/function/method in a type section.
Regards, Sven _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
