Re: [Boost-users] boost::exception_detail::error_info_base does not have virtual destructor

Subject: Re: [Boost-users] boost::exception_detail::error_info_base does not have virtual destructor
From: Frank Mori Hess (frank.hess_at_[hidden])
Date: 2011-03-18 12:06:01

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On Friday, March 18, 2011, Ted Byers wrote:
> Or is it the case that extra intelligence has been adde to
> boost::shared_ptr, et al, so that if you create a
> boost::shared_ptr<base_type>, and pass it a pointer to derived type, it
> remembers the type of the original pointer (and maintains that memory
> across copy/assignment), and does the right thing when the object is to
> be freed?

Yes.

> But I'd be curious as to why and how that would have been
> added, and when, when virtual functions acomplish the same thing with no
> extra effort or pain.

Not all base classes need have any virtual functions at all.  See 
enable_shared_from_this for example.

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