#include <boost/system/system_error.hpp>
#define TR1
#if defined(TR1)
#include <functional>	// MSVS 2008: std::tr1::function<> and std::tr1::bind<>, among others
#else
#include <boost/function.hpp>
#endif
#include <boost/bind.hpp>

using boost::system::error_code;
#if defined(TR1)
using std::tr1::function;
#else
using boost::function;
#endif

using boost::bind;		//   <== notice this

// declare global from elsewhere
void AddErrorSink(function<void(error_code)> fn);

class D
{
public:
	typedef function<void(void)> Action;
	void AddErrorAction(Action &a);

protected:
	void exec_actor(Action &a, error_code ec);
};


void D::AddErrorAction(Action &a)
{
	// when TR1 is defined for compilation, this line fails:
	// >> error C2668: 'boost::bind' : ambiguous call to overloaded function
	// ambiguity shown between boost::bind and std::tr1::bind
	// can be overcome by qualifying call ("boost::bind")
	AddErrorSink(bind(&D::exec_actor, this, a, _1));
}