D2 GUI Libs

[Andrei Alexandrescu]

Nick Sabalausky wrote:
> "Andrei Alexandrescu" <SeeWebsiteForEmail at erdani.org> wrote in message 
> news:hg698i$2rpd$1 at digitalmars.com...
>> Michel Fortin wrote:
>>> On 2009-12-14 11:41:58 -0500, Andrei Alexandrescu 
>>> <SeeWebsiteForEmail at erdani.org> said:
>>>
>>>> Adam D. Ruppe wrote:
>>>>> On Mon, Dec 14, 2009 at 07:24:11AM -0800, Andrei Alexandrescu wrote:
>>>>>> D2 will include properties that are understood by the compiler. We 
>>>>>> currently don't have a design for user-defined properties.
>>>>> Can I suggest something very simple: make them accessible from 
>>>>> __traits,
>>>>> and leave the rest to the library. Accept @anything_at_all.
>>>>>
>>>>> @myprop int a;
>>>>>
>>>>> assert(__traits(getAnnotations, a) == [ "myprop" ]);
>>>> I just had a little related idea. If you (Eldar) put the property in the 
>>>> naming convention, then you may be able to simplify things by using 
>>>> __traits(allMembers, Type), which works now.
>>>>
>>>> For example: all signals start with "signal_" and all slots start with 
>>>> "slot_".
>>>>
>>>> Would that work?
>>> It could work for simple things, but it doesn't scale well. If I wanted 
>>> to use attributes for my D/Objective-C bridge, I'd need them to be 
>>> parametrized:
>>>
>>>     @objc("sizeWithFont:forWidth:lineBreakMode:")
>>>     CGSize sizeWithFont(UIFont font, CGFloat width, UILineBreakMode 
>>> lineBreakMode);
>>>
>>> Currently, this would be:
>>>
>>>     CGSize sizeWithFont(UIFont font, CGFloat width, UILineBreakMode 
>>> lineBreakMode);
>>>     mixin ObjcBindMethod(sizeWithFont, CGSize, 
>>> "sizeWithFont:forWidth:lineBreakMode:", UIFont, CGFloat, 
>>> UILineBreakMode);
>>>
>>> With a naming convention, it'd have to be something like:
>>>
>>>     CGSize objc_sizeWithFont_forWidth_lineBreakMode_(UIFont font, CGFloat 
>>> width, UILineBreakMode lineBreakMode);
>>>
>>> Shorter to declare, but a pain to use.
>>>
>> Maybe opDispatch could help the use scenario.
>>
>> Andrei
> 
> As opDispatch pushes errors from compile-time to run-time,

We looked to it that it doesn't.

Andrei