fiber/libs/extension/examples/info/multilanguage_main.cpp

/*
 * Boost.Extension / multilanguage hello world main
 *
 * (C) Copyright Mariano G. Consoni 2007
 * 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)
 *
 * See http://www.boost.org/ for latest version.
 */

#include <boost/extension/factory_map.hpp>
#include <boost/extension/shared_library.hpp>
#include <boost/extension/convenience.hpp>

#include <iostream>
#include <memory>

#include "word_description.hpp"

int main()
{
  using namespace boost::extensions;
  //  Create the factory_map object - it will hold all of the available
  //  constructors. Multiple factory_maps can be constructed.
  factory_map fm;
  
  // load the shared library with 
  load_single_library(fm, "libMultilanguageHelloWorld.extension", 
                      "extension_export_multilanguage_word");
  //  Get a reference to the list of constructors for words.
  std::map<word_description, factory<word> > & factory_list = 
    fm.get<word, word_description>();  
  
  if (factory_list.size() < 4+4) {
    std::cout << "Error - the classes were not found (" 
              << factory_list.size() << " classes)" << std::endl;
    return 1;
  }

  for (std::map<word_description, factory<word> >::iterator current_word = 
         factory_list.begin(); current_word != factory_list.end(); 
       ++current_word) {
      // Using auto_ptr to avoid needing delete. Using smart_ptrs 
      // is recommended.
      // Note that this has a zero argument constructor - currently 
      // constructors with up to six arguments can be used by
      // default - define BOOST_EXTENSION_MAX_FUNCTOR_PARAMS to a
      // a larger value if needed.
      std::auto_ptr<word> word_ptr(current_word->second.create());
      std::cout << word_ptr->get_val() << " is " 
                << current_word->first.english_translation 
                << " in " << current_word->first.language 
                << std::endl;
  }
  std::cout << std::endl;
  
  return 0;
}