ceph/src/boost/libs/phoenix/test/statement/if_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 #include <iostream>
   8 #include <vector>
   9 #include <algorithm>
  10 #include <boost/detail/lightweight_test.hpp>
  11 #include <boost/phoenix/core.hpp>
  12 #include <boost/phoenix/statement.hpp>
  13 #include <boost/phoenix/operator.hpp>
  14
  15 int
  16 main()
  17 {
  18     using boost::phoenix::arg_names::arg1;
  19     using boost::phoenix::if_;
  20     using boost::phoenix::ref;
  21
  22     int init[] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
  23     std::vector<int> v(init, init+10);
  24
  25     std::cout << std::dec;
  26     int x = 0;
  27
  28     for_each(v.begin(), v.end(),
  29         if_(arg1 > 3 && arg1 <= 8)
  30         [
  31             std::cout << arg1 << ", ",
  32             ref(x) += arg1
  33         ]
  34     );
  35
  36     std::cout << std::endl;
  37     BOOST_TEST(x == 4+5+6+7+8);
  38
  39     x = 0;
  40     int y = 0;
  41     int z = 0;
  42
  43     for_each(v.begin(), v.end(),
  44         if_(arg1 > 5)
  45         [
  46             std::cout << arg1 << " > 5\n",
  47             ref(x) += arg1
  48         ]
  49         .else_
  50         [
  51             if_(arg1 == 5)
  52             [
  53                 std::cout << arg1 << " == 5\n",
  54                 ref(z) += arg1
  55             ]
  56             .else_
  57             [
  58                 std::cout << arg1 << " < 5\n",
  59                 ref(y) += arg1
  60             ]
  61         ]
  62     );
  63
  64     std::cout << std::endl;
  65     BOOST_TEST(x == 6+7+8+9+10);
  66     BOOST_TEST(y == 1+2+3+4);
  67     BOOST_TEST(z == 5);
  68
  69     return boost::report_errors();
  70 }