Thread overview
C++ Stylistics
Jul 18, 2010
bearophile
Jul 18, 2010
Justin Johansson
Jul 18, 2010
BLS
Jul 19, 2010
Rory McGuire
Jul 19, 2010
Rory McGuire
Jul 19, 2010
BLS
Jul 19, 2010
Rory McGuire
July 18, 2010
A Google talk in 2008 by Kevlin Henney, "C++ Stylistics": http://www.youtube.com/watch?v=zh8W4ZglOlw

Some of the limits/problems of C++ he talks about are patched by Qt, like signals & slots, Q_FLAGS, Q_PROPERTY, Q_ENUMS:
http://doc.trolltech.com/latest/moc.html
GUIs have needs quite different from the features offered by standard C++: they don't need high speed processing, but they enjoy a good runtime reflection and few other things, most of them offered in some way by the Qt "Meta-Object Compiler".

Bye,
bearophile
July 18, 2010
bearophile wrote:
> A Google talk in 2008 by Kevlin Henney, "C++ Stylistics":
> http://www.youtube.com/watch?v=zh8W4ZglOlw
> 
> Some of the limits/problems of C++ he talks about are patched by Qt, like signals & slots, Q_FLAGS, Q_PROPERTY, Q_ENUMS:
> http://doc.trolltech.com/latest/moc.html
> GUIs have needs quite different from the features offered by standard C++: they don't need high speed processing, but they enjoy a good runtime reflection and few other things, most of them offered in some way by the Qt "Meta-Object Compiler".
> 
> Bye,
> bearophile

You may have missed it but I raised the topic of Qt, it's signals
and slots architecture and its meta object compiler, on this
newsgroup about two months ago under the subject

"Can D be cute (Qt)"

http://www.digitalmars.com/webnews/newsgroups.php?art_group=digitalmars.D&article_id=109832

Cheers
Justin Johansson


July 18, 2010
On 18/07/2010 11:42, Justin Johansson wrote:
> bearophile wrote:
>> A Google talk in 2008 by Kevlin Henney, "C++ Stylistics":
>> http://www.youtube.com/watch?v=zh8W4ZglOlw
>>
>> Some of the limits/problems of C++ he talks about are patched by Qt,
>> like signals & slots, Q_FLAGS, Q_PROPERTY, Q_ENUMS:
>> http://doc.trolltech.com/latest/moc.html
>> GUIs have needs quite different from the features offered by standard
>> C++: they don't need high speed processing, but they enjoy a good
>> runtime reflection and few other things, most of them offered in some
>> way by the Qt "Meta-Object Compiler".
>>
>> Bye,
>> bearophile
>
> You may have missed it but I raised the topic of Qt, it's signals
> and slots architecture and its meta object compiler, on this
> newsgroup about two months ago under the subject
>
> "Can D be cute (Qt)"
>
> http://www.digitalmars.com/webnews/newsgroups.php?art_group=digitalmars.D&article_id=109832
>
>
> Cheers
> Justin Johansson
>
>

I regret that this is such a silence discussion. In fact Lutger (sorry don't know your full name) has implemented a fine QT like thread safe Signal Slot library.

// Q_FLAGS, Q_PROPERTY, Q_ENUMS and GUI
Finally this means > we need more _traits() power.

--We have, afaik.  no support for isProperty(), and to make visual/interactive GUI development possible, isEvent() is also necessary.

-- Now that we know that Compile- to Run- time Reflection could be just a mixin template away we have another good reason to ask for more (meta) 
 _traits power.

--Uwe Salomon's Indigo library is also offering a lot of ideas in this regard .. one thing I would name here is internationalization.

--QT in D.... ?
D bindings to GUI APIs are already there, but wait ...

/
I think the point is to give a pure *D2 QT implementation* a go, and let's see WHERE the compiler/language is not good enough.

Like Andrei did it for his std.algorithm.
/
Bjoern
July 19, 2010
On Sun, 18 Jul 2010 23:21:14 +0200, BLS <windevguy@hotmail.de> wrote:

> On 18/07/2010 11:42, Justin Johansson wrote:
>> bearophile wrote:
>>> A Google talk in 2008 by Kevlin Henney, "C++ Stylistics":
>>> http://www.youtube.com/watch?v=zh8W4ZglOlw
>>>
>>> Some of the limits/problems of C++ he talks about are patched by Qt,
>>> like signals & slots, Q_FLAGS, Q_PROPERTY, Q_ENUMS:
>>> http://doc.trolltech.com/latest/moc.html
>>> GUIs have needs quite different from the features offered by standard
>>> C++: they don't need high speed processing, but they enjoy a good
>>> runtime reflection and few other things, most of them offered in some
>>> way by the Qt "Meta-Object Compiler".
>>>
>>> Bye,
>>> bearophile
>>
>> You may have missed it but I raised the topic of Qt, it's signals
>> and slots architecture and its meta object compiler, on this
>> newsgroup about two months ago under the subject
>>
>> "Can D be cute (Qt)"
>>
>> http://www.digitalmars.com/webnews/newsgroups.php?art_group=digitalmars.D&article_id=109832
>>
>>
>> Cheers
>> Justin Johansson
>>
>>
>
> I regret that this is such a silence discussion. In fact Lutger (sorry don't know your full name) has implemented a fine QT like thread safe Signal Slot library.
>
> // Q_FLAGS, Q_PROPERTY, Q_ENUMS and GUI
> Finally this means > we need more _traits() power.
>
> --We have, afaik.  no support for isProperty(), and to make visual/interactive GUI development possible, isEvent() is also necessary.

Copied from http://digitalmars.com/d/2.0/phobos/std_traits.html
isProperty can be implemented using:

functionAttributes!(foo.func) & FunctionAttribute.PROPERTY





>
> -- Now that we know that Compile- to Run- time Reflection could be just a mixin template away we have another good reason to ask for more (meta)  
>   _traits power.
>
> --Uwe Salomon's Indigo library is also offering a lot of ideas in this regard .. one thing I would name here is internationalization.
>
> --QT in D.... ?
> D bindings to GUI APIs are already there, but wait ...
>
> /
> I think the point is to give a pure *D2 QT implementation* a go, and let's see WHERE the compiler/language is not good enough.
>
> Like Andrei did it for his std.algorithm.
> /
> Bjoern
July 19, 2010
On Mon, 19 Jul 2010 10:52:51 +0200, Rory McGuire <rmcguire@neonova.co.za> wrote:

> On Sun, 18 Jul 2010 23:21:14 +0200, BLS <windevguy@hotmail.de> wrote:
>
>> On 18/07/2010 11:42, Justin Johansson wrote:
>>> bearophile wrote:
>>>> A Google talk in 2008 by Kevlin Henney, "C++ Stylistics":
>>>> http://www.youtube.com/watch?v=zh8W4ZglOlw
>>>>
>>>> Some of the limits/problems of C++ he talks about are patched by Qt,
>>>> like signals & slots, Q_FLAGS, Q_PROPERTY, Q_ENUMS:
>>>> http://doc.trolltech.com/latest/moc.html
>>>> GUIs have needs quite different from the features offered by standard
>>>> C++: they don't need high speed processing, but they enjoy a good
>>>> runtime reflection and few other things, most of them offered in some
>>>> way by the Qt "Meta-Object Compiler".
>>>>
>>>> Bye,
>>>> bearophile
>>>
>>> You may have missed it but I raised the topic of Qt, it's signals
>>> and slots architecture and its meta object compiler, on this
>>> newsgroup about two months ago under the subject
>>>
>>> "Can D be cute (Qt)"
>>>
>>> http://www.digitalmars.com/webnews/newsgroups.php?art_group=digitalmars.D&article_id=109832
>>>
>>>
>>> Cheers
>>> Justin Johansson
>>>
>>>
>>
>> I regret that this is such a silence discussion. In fact Lutger (sorry don't know your full name) has implemented a fine QT like thread safe Signal Slot library.
>>
>> // Q_FLAGS, Q_PROPERTY, Q_ENUMS and GUI
>> Finally this means > we need more _traits() power.
>>
>> --We have, afaik.  no support for isProperty(), and to make visual/interactive GUI development possible, isEvent() is also necessary.
>
> Copied from http://digitalmars.com/d/2.0/phobos/std_traits.html
> isProperty can be implemented using:
>
> functionAttributes!(foo.func) & FunctionAttribute.PROPERTY
>
>
>
>
>
>>
>> -- Now that we know that Compile- to Run- time Reflection could be just a mixin template away we have another good reason to ask for more (meta)   _traits power.
>>
>> --Uwe Salomon's Indigo library is also offering a lot of ideas in this regard .. one thing I would name here is internationalization.
>>
>> --QT in D.... ?
>> D bindings to GUI APIs are already there, but wait ...
>>
>> /
>> I think the point is to give a pure *D2 QT implementation* a go, and let's see WHERE the compiler/language is not good enough.
>>
>> Like Andrei did it for his std.algorithm.
>> /
>> Bjoern




template isProperty(alias func) if (isCallable!(func)) {
	enum isProperty = (functionAttributes!(func) & FunctionAttribute.PROPERTY)==0 ? false : true;
}
July 19, 2010
On 19/07/2010 10:58, Rory McGuire wrote:
>
> template isProperty(alias func) if (isCallable!(func)) {
>      enum isProperty = (functionAttributes!(func) &
> FunctionAttribute.PROPERTY)==0 ? false : true;
> }


THANKS Rory

isProperty() should become part of phobos.
July 19, 2010
On Mon, 19 Jul 2010 20:33:59 +0200, BLS <windevguy@hotmail.de> wrote:

> On 19/07/2010 10:58, Rory McGuire wrote:
>>
>> template isProperty(alias func) if (isCallable!(func)) {
>>      enum isProperty = (functionAttributes!(func) &
>> FunctionAttribute.PROPERTY)==0 ? false : true;
>> }
>
>
> THANKS Rory
>
> isProperty() should become part of phobos.

I suppose so, currently one needs to make a wrapper for all the function attributes that you
might want to detect.