Re: [Boost-users] How to use noncopyable?

Subject: Re: [Boost-users] How to use noncopyable?
From: Roman Perepelitsa (roman.perepelitsa_at_[hidden])
Date: 2009-02-23 09:02:28

2009/2/23 Esben Mose Hansen <boost_at_[hidden]>

> Isn't that admonishing simple wrong in all cases where the the base class
> is
> private (and maybe protected, I've never used that)? I mean, when exactly
> would you risk deleting a class through a pointer or reference to a private
> base class?
>

struct Base {};

void Foo(Base* base) {
  delete base;
}

struct Derived : private Base {
  void Bar() {
    Foo(this); // Oops.
  }
};

Even with private inheritance there is a risk for an object to be deleted
through the pointer to base. Although, of course, with public inheritance
this risk is much higher.

Roman Perepelitsa.