Re: [boost] Re: Re: shared_ptr and ->*

From: Paul Mensonides (pmenso57_at_[hidden])
Date: 2002-07-09 00:59:33

> It looks to me like boost::function makes this difficult, because it
> encodes the types of the arguments in different template parameters,
> instead of as one parameter like you have done.  Perhaps an
> actual independent closure library is appropriate here.  It is certainly
> useful in several different contexts.  You gonna finish what you started,
> Paul; or are you going to make me struggle with it? ;)
>
> Dave

Well, the mechanism that I sent won't compile without partial specialization.
Of course, the mechanism could be implemented externally, in terms of p->get().

Now that I look at it however, I don't know that using any type-traits
metaprogramming is necessary except on the reference-to-reference problem in the
support for pointers-to-data-members.  Otherwise, I think it is a "trust the
programmer" case as far as the argument types are concerned--they are the same
as the pointer-to-member.

One concern however....  should the closure facility disallow normal copying if
it is working in concert with a shared_ptr?

Attached is a sample implementation and a test file.  I'm sure it can be
integrated into shared_ptr better than this. :)

Paul Mensonides