Re: [Boost-users] Use of a member pointer to a member function in for_each - is it possible?

From: Scott Lamb (slamb_at_[hidden])
Date: 2004-05-27 01:23:37

On 26 May 2004, at 11:48 PM, Vesselin Kostadinov wrote:
> 	//using the right combination of for_each, bind, ref, mem_fn, etc:
> //	std::for_each(foos.begin(), foos.end(),
> //		boost::bind(???????),
> //		_1, boost::ref(param));
> }
>

Hmm, I don't know if you could do that directly. If you added a 
function to foo like such:

     void call_func_ptr(int &x) { this->func_ptr(x); }

then you could do:

     std::for_each(foos.begin(), foos.end(), 
boost::bind(&foo::call_func_ptr, _1, boost::ref(param));

You definitely want the _1 as a parameter to boost::bind, not 
std::for_each. Every argument (including the "this" pointer) should be 
mentioned in the bind, even if only to provide the placeholder.

Scott