[Interest] Fwd: Qt 4.8, MetaType

[Thiago Macieira]

On sexta-feira, 26 de julho de 2013 20:20:57, Alexander Syvak wrote:
> About the last statement. If an object uses internally slots and signals,
> it should inherit QObject.

Correct.

> QObject is not copyconstructible, thus, the descendant as well.

Correct.

> If the object requires queued signals or QObject::property() API then
> qRegisterMetaType() should be called, which
> requires CopyConstructible property of the object. It's a cycle here.

No, it isn't.

> Where is a misunderstanding?

You're confusing the the object that contains properties (that derives from 
QObject and is not copyable) with the type of the property.

The type of properties are what we call "value-type": they are default-
contructible, publicly destroyable, copyable, movable and often implicitly 
shared. For those reasons, they don't derive from QObject.

-- 
Thiago Macieira - thiago.macieira (AT) intel.com
  Software Architect - Intel Open Source Technology Center
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 190 bytes
Desc: This is a digitally signed message part.
URL: <http://lists.qt-project.org/pipermail/interest/attachments/20130726/25c8e4f2/attachment.sig>