On Wed, 2008-05-21 at 10:32 -0700, Joe Buck wrote:
> You forgot to add
>
> A::A(const A&) { ++c;}
>
> The missing call is to the copy constructor. Since you didn't declare
> one, the compiler inserts one, and it doesn't increment the counter.
Arghl your right. I removed the copy constructor two test cases before
and forget to add it again.
> Also, there are situations where a C++ compiler is allowed to eliminate
> temporaries (even if this changes side effects that are invoked by
> a copy constructor).
Yes your right. C++ Standard 12.8/15 says the same. But the object has
to be cv-unqualified and/or unnamed.
Thanks for your hint!
Best regards
Stefan
