ceph/src/boost/libs/phoenix/test/statement/switch_tests.cpp

   1 /*=============================================================================
   2     Copyright (c) 2001-2007 Joel de Guzman
   3
   4     Distributed under the Boost Software License, Version 1.0. (See accompanying
   5     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   6 ==============================================================================*/
   7
   8 #include <iostream>
   9 #include <vector>
  10 #include <algorithm>
  11 #include <boost/detail/lightweight_test.hpp>
  12 #include <boost/phoenix/core.hpp>
  13 #include <boost/phoenix/statement.hpp>
  14 #include <boost/phoenix/operator.hpp>
  15
  16 int
  17 main()
  18 {
  19     using boost::phoenix::arg_names::_1;
  20     using boost::phoenix::case_;
  21     using boost::phoenix::switch_;
  22     using boost::phoenix::ref;
  23     using boost::phoenix::val;
  24
  25     using std::cout;
  26     using std::endl;
  27     using std::vector;
  28     using std::for_each;
  29
  30     int init[] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
  31     vector<int> v(init, init+10);
  32
  33     for_each(v.begin(), v.end(),
  34         switch_(_1)
  35         [
  36             // wierd case, why not just use if(...), but valid, nonetheless
  37             case_<4>(cout << val("<4>") << endl)
  38         ]
  39     );
  40
  41     cout << endl;
  42     for_each(v.begin(), v.end(),
  43         switch_(_1)
  44         [
  45             // wierd case, but valid, nonetheless
  46             default_(cout << val("<any...>") << endl)
  47         ]
  48     );
  49
  50     cout << endl;
  51
  52     for_each(v.begin(), v.end(),
  53         switch_(_1)
  54         [
  55             case_<1>(cout << val("<1>") << endl),
  56             case_<2>(cout << val("<2>") << endl),
  57             case_<3>(cout << val("<3>") << endl),
  58             case_<4>(cout << val("<4>") << endl)
  59         ]
  60     );
  61
  62     cout << endl;
  63
  64     for_each(v.begin(), v.end(),
  65         switch_(_1)
  66         [
  67             case_<1>(cout << val("<1>") << endl),
  68             case_<2>(cout << val("<2>") << endl),
  69             case_<3>(cout << val("<3>") << endl),
  70             case_<4>(cout << val("<4>") << endl),
  71             default_(cout << val("<over 4>") << endl)
  72         ]
  73     );
  74
  75     return boost::report_errors();
  76 }