On 18 Oct, 16:06, Barry <dhb2...@gmail.com> wrote:
> ke...@bytebrothers.co.uk wrote:
> > Now this all compiles and works just fine, but when I turn on "-Wall -
> > W" in gcc, it tells me that:
>
> > derived.cc:134: warning: base class 'class Base' should be explicitly
> > initialized in the copy constructor
>
> > I'm afraid I'm being rather dense today, as I don't understand what
> > it's complaining about. Can someone explain for me please?
>
> It complains that you should write your Derived ctor in this way:
>
> Derived:erived()
> : Base()
> , p_(new DerivedPrivate())
> {}

OK, this makes the warning go away - thanks. Now, what's happening?
I thought that by the time we reached Derived's constructor (in this
case, copy constructor), Base was guaranteed to have been fully
constructed. This result implies I am wrong...