ceph/src/boost/libs/parameter/test/tutorial.cpp

   1 // Copyright David Abrahams 2005. Distributed under the Boost
   2 // Software License, Version 1.0. (See accompanying
   3 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   4
   5 #include <iostream>
   6 #include <boost/parameter/keyword.hpp>
   7
   8 namespace graphs
   9 {
  10    BOOST_PARAMETER_KEYWORD(tag, graph)    // Note: no semicolon
  11    BOOST_PARAMETER_KEYWORD(tag, visitor)
  12    BOOST_PARAMETER_KEYWORD(tag, root_vertex)
  13    BOOST_PARAMETER_KEYWORD(tag, index_map)
  14    BOOST_PARAMETER_KEYWORD(tag, color_map)
  15 }
  16
  17 namespace graphs { namespace core
  18 {
  19    template <class ArgumentPack>
  20    void depth_first_search(ArgumentPack const& args)
  21    {
  22        std::cout << "graph:\t" << args[graph] << std::endl;
  23        std::cout << "visitor:\t" << args[visitor] << std::endl;
  24        std::cout << "root_vertex:\t" << args[root_vertex] << std::endl;
  25        std::cout << "index_map:\t" << args[index_map] << std::endl;
  26        std::cout << "color_map:\t" << args[color_map] << std::endl;
  27    }
  28 }} // graphs::core
  29
  30 int main()
  31 {
  32      using namespace graphs;
  33
  34      core::depth_first_search((
  35        graph = 'G', visitor = 2, root_vertex = 3.5,
  36        index_map = "hello, world", color_map = false));
  37      return 0;
  38 }