libs/bind/bind_visitor.cpp

#include <boost/config.hpp>
#if defined(BOOST_MSVC)
#pragma warning(disable: 4786)  // identifier truncated in debug info
#pragma warning(disable: 4710)  // function not inlined
#pragma warning(disable: 4711)  // function selected for automatic inline expansion
#pragma warning(disable: 4514)  // unreferenced inline removed
#endif
//
//  bind_visitor.cpp - tests bind.hpp with a visitor
//
//  Copyright (c) 2001 Peter Dimov and Multi Media Ltd.
//
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
#include <boost/bind.hpp>
#include <boost/ref.hpp>
#if defined(BOOST_MSVC) && (BOOST_MSVC < 1300)
#pragma warning(push, 3)
#endif
#include <iostream>
#include <typeinfo>
#if defined(BOOST_MSVC) && (BOOST_MSVC < 1300)
#pragma warning(pop)
#endif
//
struct visitor
{
    template<class T> void operator()( boost::reference_wrapper<T> const & r ) const
    {
        std::cout << "Reference to " << typeid(T).name() << " @ " << &r.get() << " (with value " << r.get() << ")\n";
    }
    template<class T> void operator()( T const & t ) const
    {
        std::cout << "Value of type " << typeid(T).name() << " (with value " << t << ")\n";
    }
};
int f(int & i, int & j, int)
{
    ++i;
    --j;
    return i + j;
}
int x = 2;
int y = 7;
int main()
{
    using namespace boost;
    visitor v;
    visit_each(v, bind<int>(bind(f, ref(x), _1, 42), ref(y)), 0);
}