On the subject of properties, and possibility of having them in the library

[Simen Kjaeraas]

On 2013-49-27 09:01, Timon Gehr <timon.gehr at gmx.ch> wrote:

> On 01/27/2013 12:23 AM, Simen Kjaeraas wrote:
>> On 2013-23-26 20:01, Timon Gehr <timon.gehr at gmx.ch> wrote:
>>
>>> On 01/26/2013 03:41 PM, Simen Kjaeraas wrote:
>>>> While the storm raged, I decided to try implementing properties as
>>>> library types. I encountered a few obstacles, which I will outline  
>>>> here.
>>>>
>>>> First, my intended syntax:
>>>>
>>>>    class A {
>>>>      int _n;
>>>       mixin Property!(
>>>>        () => _n,
>>>>        value => _n = value
>>>>      ) n;
>>>>    }
>>>> ...
>>>
>>>
>>> http://d.puremagic.com/issues/show_bug.cgi?id=7653
>>
>> And how might that work?
>>
>>
>
> It wouldn't work so well. I think there is no way to get what you want,  
> because the type of a.n would need to be 'int', and so there is no way  
> to hook in the setter.

There's an enhancement request[1] in bugzilla for operator overloading on
non-type template instances. This, with opDispatch and alias this (and
allowing for typeof to return the alias this'd type in this situation),
would allow for properties to be a simple template.

[1]: http://d.puremagic.com/issues/show_bug.cgi?id=5158

-- 
Simen