[Development] QProperty and library coding guide
Giuseppe D'Angelo
giuseppe.dangelo at kdab.com
Sat Jul 18 22:36:11 CEST 2020
Il 18/07/20 12:08, Arno Rehn ha scritto:
> Can't we just hide the QProperty behind a method call, like with an
> ordinary getter method? E.g.
>
> class Foo
> {
> // ...
> QPropert<int> &bar() {
> Q_D(Foo);
> return d->bar;
> }
> };
>
> struct FooPrivate {
> QProperty<int> bar;
> };
>
> Sure, property access then isn't as nice as with the struct wrapper,
> because you have the method call in between, but at least it's not
> undefined behavior and there's a lot less complexity when putting it
> into the pimpl object.
I'm assuming that one of the goals is to make the new property syntax
invisible and identical for the users. Code like this
auto value = obj->property();
must still compile, and decltype(value) better be the actual property
type and not any proxy object (which are still second class citizens in
C++).
My 2 c,
--
Giuseppe D'Angelo | giuseppe.dangelo at kdab.com | Senior Software Engineer
KDAB (France) S.A.S., a KDAB Group company
Tel. France +33 (0)4 90 84 08 53, http://www.kdab.com
KDAB - The Qt, C++ and OpenGL Experts
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