Tiziano De Togni schreef:
Florian Klaempfl ha scritto:
Skybuck Flying schrieb:
One drawback of objects already discovered:
Objects cannot have the same field identifiers.
Indeed, especially if you want to win an obfuscation contest.
ok, this is true for object type, but it should not be extended to class
types. Look at this example taken from Delphi Help:
type
TAncestor = class
Value: Integer;
end;
TDescendant = class(TAncestor)
Value: string; // hides the inherited Value field
end;
var
MyObject: TAncestor;
begin
MyObject := TDescendant.Create;
// MyObject.Value := 'Hello!'; // error
TDescendant(MyObject).Value := 'Hello!'; // works!
end;
it compiles correctly in Delphi (5 and 7) but FPC (v2.2.0 - compiled
with Params Values=" -S2cdgi -OG1 -gl -WG -vewnhi") still says
that there is a duplicate identifier "Value"...
am I correct?
This is not allowed in {$mode objfpc}, because of the reasons Florian memtioned. It
is allowed in {$mode delphi}.
Vincent
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