Re: [Boost-users] Example program that fails to compile (boost::bind and boost::function called for collection)

28 Jan 2009

      Steven Watanabe <watanabesj <at> gmail.com> writes:
...
AMDG
Archie14 wrote:
...
delegate dosomething;
  Test(CLIENTS& val) :  m_clients(val) {}
  void run()
  {
      std::for_each(m_clients().begin(), m_clients().end(), 
      	boost::bind(&CLIENTS::CLIENT::commandhandler, 
boost::ref(dosomething), _1 ));
  }
};
The parameters to boost::bind are in the wrong order.
Try:
boost::bind(&CLIENTS::CLIENT::commandhandler,
  _1, boost::ref(dosomething)));
In Christ,
Steven Watanabe
Steven,

Thank you very much for the help. I have a follow-up question regarding 
boost::bind. Specifically - how can I bind one boost::function to another? Here 
is the short example that fails to compile:

#include <boost/bind.hpp>
#include <boost/function.hpp>
#include <boost/ptr_container/ptr_vector.hpp>

typedef boost::function<void (int, int, const char*) > delegateOne; 
typedef boost::function<void (int, const char*) > delegateTwo; 

class A : public boost::noncopyable
{
public:
	void commandhandler(delegateOne& f) {
// I want to replace first argument in "delegateOne" with value 100.
		delegateTwo two = boost::bind(&f, 100, _2, _3); 
	}
};

int _tmain(int argc, _TCHAR* argv[])
{
	A a;
	delegateOne t;
	a.commandhandler(t);
}