Am Do., 17. Jan. 2019, 13:10 hat Mattias Gaertner via fpc-pascal <
[email protected]> geschrieben:
> Hi,
>
> A type helper for a string can add a constructor.
> But how it can be used differs between FPC and Delphi.
>
> For example:
>
> {$modeswitch typehelpers}
> type
> THelper = type helper for string
> constructor Creator(i: integer);
> end;
>
> var
> s: string;
> begin
> string.creator(3);
> // allowed in delphi+fpc, creating a new string
>
> s.creator(3);
> // fpc: same as above, creating a new string
> // delphi: error: Cannot call constructors using
> // instance variables
> end;
>
> IMO the fpc way is inconsistent to how constructors work for classes
> and records. A constructor usually only creates something when called
> with the type (e.g. TObject.Create), while behaving like a normal
> function when called with an instance (e.g. obj.create).
>
> Is this a bug or by design?
>
I would say it's a bug as in my opinion it should behave as with classes.
Regards,
Sven
>
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