Am 08.09.2022 um 16:55 schrieb Hairy Pixels via fpc-pascal:
A function reference can call a class method but can you get the TMethod data from function references? It was possible with “is object” to cast to TMethod but that doesn’t seem to be possible with references.========= type TMyClass = class constructor Create; procedure DoThis; end; constructor TMyClass.Create; var proc: reference to procedure; begin proc := @DoThis; writeln(Assigned(PMethod(proc)^.data)); // FALSE end;
As mentioned elsewhere function references are in fact interfaces. And you can't retrieve a method pointer to a interface function, cause relying on that would result in either memory leaks or premature release of the interface, because TMethod only contains a Pointer for the Data field that does not support managed types.
You can get a reference to the raw interface by doing this however: === code begin === var proc: reference to procedure; i: IUnknown; begin i := IUnknown(PPointer(@proc)^); end. === code end === Though I don't know what you hope to achieve with this... Regards, Sven _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org https://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
