Boost C++ Libraries of the most highly regarded and expertly designed C++ library projects in the world. Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

This is the documentation for an old version of Boost. Click here to view this page for the latest version.


// Boost.Function library

//  Copyright Douglas Gregor 2002-2003. Use, modification and
//  distribution is subject to the Boost Software License, Version
//  1.0. (See accompanying file LICENSE_1_0.txt or copy at

// For more information, see

#include <iostream>
#include <cstdlib>

#include <boost/test/minimal.hpp>
#include <boost/lambda/lambda.hpp>
#include <boost/lambda/bind.hpp>
#include <boost/function.hpp>

static unsigned
func_impl(int arg1, bool arg2, double arg3)
  using namespace std;
  return abs (static_cast<int>((arg2 ? arg1 : 2 * arg1) * arg3));

int test_main(int, char*[])
  using boost::function;
  using namespace boost::lambda;

  function <unsigned(bool, double)> f1 = bind(func_impl, 15, _1, _2);
  function <unsigned(double)>       f2 = boost::lambda::bind(f1, false, _1);
  function <unsigned()>             f3 = boost::lambda::bind(f2, 4.0);


  return 0;