text: 
  // Copyright (C) 2009-2012 Lorenzo Caminiti
  // Distributed under the Boost Software License, Version 1.0
  // (see accompanying file LICENSE_1_0.txt or a copy at
  // http://www.boost.org/LICENSE_1_0.txt)
  // Home at http://www.boost.org/libs/local_function
  
  #include <boost/config.hpp>
  #ifdef BOOST_NO_CXX11_VARIADIC_MACROS
  #   error "variadic macros required"
  #else
  
  #include "addable.hpp"
  #include <boost/local_function.hpp>
  #include <boost/type_traits/remove_reference.hpp>
  #include <boost/concept_check.hpp>
  #include <boost/detail/lightweight_test.hpp>
  #include <algorithm>
  
  //[typeof_template
  template<typename T>
  T calculate(const T& factor) {
      T sum = 0;
  
      void BOOST_LOCAL_FUNCTION_TPL(const bind factor, bind& sum, T num) {
          // Local function `TYPEOF` does not need `typename`.
          BOOST_CONCEPT_ASSERT((Addable<typename boost::remove_reference<
                  BOOST_LOCAL_FUNCTION_TYPEOF(sum)>::type>));
          sum += factor * num;
      } BOOST_LOCAL_FUNCTION_NAME_TPL(add)
  
      add(6);
      return sum;
  }
  //]
  
  int main(void) {
      BOOST_TEST(calculate(10) == 60);
      return boost::report_errors();
  }
  
  #endif // VARIADIC_MACROS
  