Quote Originally Posted by brewbuck View Post
You can refer to "this" in the initialization list, but you cannot use it to either directly or indirectly reference members which have not yet been constructed. In other words, you can use "this" to access members of the base (if one exists) but not members of the class itself. At least, not members which are not yet constructed.

The conditions are sufficiently tricky, and compilers are sufficiently buggy, that a wise programmer would not use "this" in the init list. This is why the warning is there.
In other words, an proprety object should not use 'this' in the initialization list, because the object refered by this is under constrcution and the object is imcomplete. Although the property object just stores the 'this' while initializing, I gave up this implementation in logic/concept correct.