Hi,

For example:
type
  THelper = type helper for string
    function GetItems(Index: word): word;
    property Items[Index: word]: word read GetItems; default;
  end;

Delphi forbids this with "'default' directive not allowed in record helper type".
FPC ignores it. Aka aString[1] has still the normal meaning.

Same for arrays, double, integers.

Is this an oversight, or has FPC some use for the default directive?

Mattias

For now I'd say that it's an oversight. Delphi allows it for class and record helpers, but not for helpers for primitive types. In theory we could allow it for non-array and non-string types (aka those that don't have an internal [...] "operator"). On the other hand we can simply forbid "default" for primitive type helpers like Delphi does...

Regards,
Sven

Thanks!

Mattias