@property needed or not needed?

[deadalnix]

Le 19/11/2012 10:02, Adam D. Ruppe a écrit :
> On Monday, 19 November 2012 at 15:01:36 UTC, Andrei Alexandrescu wrote:
>> Would you please start a DIP with a paste of this idea?
>
> here it is:
> http://www.prowiki.org/wiki4d/wiki.cgi?LanguageDevel/DIPs/DIP21
>
> I tried to implement this a while ago and hit some pain after some early
> success. The pain was trying to get assignments to work without breaking
> other cases like returning ref.
>
> My plan was to make any reference to a @property change to a CallExp or
> whatever. But if you do that and it is on the left hand side of an
> assignment, you do the wrong thing.
>
> foo = foo + 1;
>
> should generally become:
>
> foo(foo() + 1);
>
> but if there isn't a setter, we should leave it as foo() = foo() + 1;
> and finding the setter is a bit of a pain. Then, of course, we ideally
> want foo += 1 to work too..
>

This make it impossible to only define a getter only when one want to 
return by reference.

> Maybe someone who knows the compiler better than me will make it look
> easy though.