Re: auto_ptr compile error

From:
David Wilkinson <no-reply@effisols.com>
Newsgroups:
microsoft.public.vc.language
Date:
Thu, 27 Mar 2008 05:16:28 -0400
Message-ID:
<u7Jp8s#jIHA.3840@TK2MSFTNGP02.phx.gbl>
George wrote:

Hi David,

1.

But for "compilation firewall" reasons you may not want to do that.

You mean if we change the structure of a class, which is used as type
parameter of the template class, we have to recompile?

2.

If the answer to (1) is yes, I do not think it is really an issue, since
according to standard, we must do it and how could you bypass it?


Sorry I think it is you first mentioned "compilation firewall" as drawback
of make declaration full before using it in template class as type parameter.
I do not think I mentioned it before. Why do you think we are in a round? :-)

Any comments and answers to my two questions below?


George:

1. A quick search of this group shows at least two threads on the pimpl idiom
that you have taken part in, so you should know the meaning of "compilation
firewall". If not, look it up.

2. In his very first post, Tamas showed how to "fix" this problem by moving the
definition of ~Owner() to after the full definition of the class Thing. That is
what we have been talking about. So that is how you can fix it. Just because
code violates the standard does not mean in practice that it will not work on
most/all compilers.

--
David Wilkinson
Visual C++ MVP

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