Re: [Boost-users] [Q] error with shared_ptr, for_each, boost::mem_fn

Subject: Re: [Boost-users] [Q] error with shared_ptr, for_each, boost::mem_fn
From: V S P (toreason_at_[hidden])
Date: 2009-02-24 21:12:03

Ok, I apologize
I misunderstood the suggestion
I made the function as non static member, but kept the input argument.

If I make myfunc to take void, then it works.

I would like to know if there any way to use static member functions
with
the for_each sematic and shared_ptr

thank you,
Vlad

On Tue, 24 Feb 2009 21:04 -0500, boost-users_at_[hidden] wrote:
> Hi, thank you for such a quick reply
> 
> I have tried the member function, getting different type of error now
> class B;
> struct A : public enable_shared_from_this<A>
> {
>    void myfunc(const A* in)
>    {}
> };
> ------------------------------------------------
> sharedptr.cpp
> C:\usr\local\MSVS9.0\VC\INCLUDE\algorithm(29) : error C2064: term does
> not evalu
> ate to a function taking 1 arguments
>         class does not define an 'operator()' or a user defined
>         conversion opera
> tor to a pointer-to-function or reference-to-function that takes
> appropriate num
> ber of arguments
>         sharedptr.cpp(38) : see reference to function template
>         instantiation '_F
> n1
> std::for_each<std::_Vector_iterator<_Ty,_Alloc>,boost::_mfi::mf1<R,T,A1>>(_In
> It,_InIt,_Fn1)' being compiled
>         with
>         [
>             _Fn1=boost::_mfi::mf1<void,A,const A *>,
>             _Ty=B::tBptr,
>             _Alloc=std::allocator<B::tBptr>,
>             R=void,
>             T=A,
>             A1=const A *,
>             _InIt=std::_Vector_iterator<B::tBptr,std::allocator<B::tBptr>>
>         ]
> 
> ---------------------------------------------
> 
> Also, is there a way to get the for_each and shared_ptr to work with
> static member functions?
> I tried std::ptr_fun    but that one also has a problem that does not
> even try to call the 
> shared_ptr::get_pointer
> 
> I also tried to enabled BOOST_MEM_FN_ENABLE_CDECL  (which is what I use
> for the project) -- that did not help.
> I tried even just having myfunc take const  shared_ptr<A> or
> shared_ptr<B>  -- that did not work either.
> 
> 
> 
> 
> thank you again for your help,
> Vlad
> 
> 
> 
> 
> 
> On Tue, 24 Feb 2009 17:42 -0800, "Steven Watanabe"
> <watanabesj_at_[hidden]> wrote:
> > AMDG
> > 
> > V S P wrote:
> > > struct A: public enable_shared_from_this<A>
> > > {
> > >    static void myfunc(const A* in);
> > > };
> > >    
> > > for_each (v.begin(),v.end(), boost::mem_fn(&A::myfunc));   
> > >   
> > 
> > A::myfunc is a static member function, so mem_fn doesn't work.
> > If you declare it as a non-static member
> >   void myfunc() const;
> > it works.
> > 
> > In Christ,
> > Steven Watanabe
> > 
> > _______________________________________________
> > Boost-users mailing list
> > Boost-users_at_[hidden]
> > http://lists.boost.org/mailman/listinfo.cgi/boost-users
> -- 
>   V S P
>   toreason_at_[hidden]
> 
> -- 
> http://www.fastmail.fm - mmm... Fastmail...
> 
-- 
  V S P
  toreason_at_[hidden]
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