[Boost-users] Re: shared_ptrs with std::mem_fn

From: David Abrahams (dave_at_[hidden])
Date: 2004-05-07 12:49:44

"Mark Storer" <MStorer_at_[hidden]> writes:

>> > Now it doesn't compile because (of course) Attr::Write is 
>> not a method of
>> > shared_ptr<Attr>.
>> >
>> > Do I have to use boost's bind and mem_fn objects instead of std?
>> 
>> Yes; bind and mem_fn handle this problem (and quite a few 
>> others) automatically.
>
> Why is this a problem?  I thought std::mem_fn called the function
> through the -> operator, which 'should' work (but obviously
> doesn't).  I would think this would only crop up through
> mem_fun_ref, but then you wouldn't have a container of
> shared_ptr<Attr>, but Attr.

boost::mem_fn erases the need for a separate mem_fn_ref.  If
http://www.boost.org/libs/bind/mem_fn.html fails to explain it to you,
please ask more specific questions.
  
HTH,
-- 
Dave Abrahams
Boost Consulting
http://www.boost-consulting.com