[fpc-pascal] Auto vars (again)

[Ryan Joseph]

> On Aug 18, 2018, at 11:04 AM, Ryan Joseph <ryan at thealchemistguild.com> wrote:
> 
>> The solution which probably should be accepted by fpc team is default property without indexer:
>> 
>> === code begin ===
>> property obj: T read fobj; default;
>> === code end ===
>> 
>> with this property should be possible:
>> 
>> === code begin ===
>> Writeln(o.ToString); 
>> === code end ===
> 
> How does that property work exactly? Making this work properly is the most important part but I never considered it. It sounds like “with” statements kind of.

Ok, I understand what you mean now. This is actually a really great idea for all sorts of other uses  because it helps to unify namespaces between classes and prevent long.and.annoying() chaining of fields.

Btw why should this be a property? I know [] properties use the default keyword also but I don’t understand where this came  from and it’s strange to name the [] property since the name is irrelevant. I would think you’d want to just put a modifier on the default field:

 TAutoCreate<T: class> = record
    _: T; default;
    class operator Initialize(var a: TAutoCreate<T>);
    class operator Finalize(var a: TAutoCreate<T>);
    class operator Copy(constref a: TAutoCreate<T>; var b: TAutoCreate<T>);
    class operator AddRef(var a: TAutoCreate<T>);
  end;

just curious and I thought I’d ask. 

Regards,
	Ryan Joseph