Re: Borland C++ Builder 5.5 & scoped_ptr

From: Gennadiy E. Rozental (rogeeff_at_[hidden])
Date: 2002-09-19 10:07:01

--- In Boost-Users_at_y..., "Brian" <bneal_at_z...> wrote:
> --- In Boost-Users_at_y..., "Gennadiy E. Rozental" <rogeeff_at_m...> 
wrote:
> > This was discussed during Boost.Test review.
> > Peter some time ago made a changes in boost::shared_ptr that 
allows 
> > it to be used with Borland 5.5 namely in the situation you 
> described.
> > 
> > Gennadiy.
> 
> Hi...could you clarify this? All I noticed was that shared_ptr had 
> that compile time check for an incomplete type removed, whereas 
> scoped_ptr still has it. Are you saying that if I switch from 
> scoped_ptr to shared_ptr the destructor will get called? 
> 
> Regards,
> 
> Brian Neal

The general idea:

class A {
...
    A() : m_deleter( checked_deleter() )
    ~A() { m_deleter( m_ptr ); }

    deleter_function m_deleter;
    T*               m_ptr;
};

AFAIK this way compiler does not know in a destructor what will 
happend with the m_ptr and does not try to istantiate ~T().

Gennadiiy.