Explicit Interface Implementation

Elements Oxygene
1

How can this be implemented:

ICloneable_1 = public interface
function Clone: Boolean;
end;

ICloneable_2 = public interface
function Clone: Integer;
end;

TCloneable = class(ICloneable_1, ICloneable_2)
private
function ICloneable_1.Clone: Boolean;
function ICloneable_2.Clone: Integer;

public
end;

The error raised is: (E1) colon (:slight_smile: expected, got period (.) on line function ICloneable_1.Clone: Boolean;

Thanks

2

Hi,

the syntax would be something like this:

TCloneable = class(ICloneable_1, ICloneable_2)
private
  method Clone1: Boolean; implements ICloneable_1.Clone;
  method Clone2: Integer; implements ICloneable_2.Clone;

Where the local names you pick are arbitrary, as long as the are unique. Please see https://docs.elementscompiler.com/Oxygene/Members/ExplicitInterfaceImplementations/ for the full description.

yours,
marc

3

Thanks, that is working. Got an issue though with hiding the code from Delphi, any idea on that?

screenshot
screenshot1020×214 284 KB

4

Yeah, the problem is that, for Oxygene, code inside $IFDEFS still need to be syntactically valid, because $IFDEFs aren’t just a dump pre-processor, but part of the syntax tree. I’ll log an issue to support Delphi-style interface mappings in undefined code (and maybe also support them in Compatibility mode).

5

Thanks, logged as bugs://84276

6

bugs://84276 got closed with status fixed.