ceph/src/boost/libs/phoenix/test/scope/dynamic_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 <string>
   9 #include <cmath>
  10
  11 #include <boost/detail/lightweight_test.hpp>
  12 #include <boost/phoenix/core.hpp>
  13 #include <boost/phoenix/operator.hpp>
  14 #include <boost/phoenix/scope/dynamic.hpp>
  15
  16 struct my_dynamic : ::boost::phoenix::dynamic<int, std::string, double>
  17 {
  18     my_dynamic() : num(init<0>(this)), message(init<1>(this)), real(init<2>(this)) {}
  19
  20     member1 num;
  21     member2 message;
  22     member3 real;
  23 };
  24
  25 //  You may also use the macro below to achieve the same as above:
  26 //
  27 //BOOST_PHOENIX_DYNAMIC(
  28 //    my_dynamic,
  29 //        (int, num)
  30 //        (std::string, message)
  31 //        (double, real)
  32 //);
  33
  34 int
  35 main()
  36 {
  37     using namespace boost::phoenix;
  38     using namespace boost::phoenix::arg_names;
  39
  40     my_dynamic clos;
  41
  42     {   //  First stack frame
  43         dynamic_frame<my_dynamic::self_type> frame(clos);
  44         (clos.num = 123)();
  45         (clos.num += 456)();
  46         (clos.real = clos.num / 56.5)();
  47         (clos.message = "Hello " + std::string("World "))();
  48
  49         {   //  Second stack frame
  50             dynamic_frame<my_dynamic::self_type> frame(clos);
  51             (clos.num = 987)();
  52             (clos.message = std::string("Abracadabra "))();
  53             (clos.real = clos.num * 1e30)();
  54
  55             {   //  Third stack frame
  56                 boost::phoenix::vector3<int, std::string, double> init = {-1, "Direct Init ", 3.14};
  57                 dynamic_frame<my_dynamic::self_type> frame(clos, init);
  58
  59                 (std::cout << clos.message << clos.num << ", " << clos.real << '\n')();
  60                 BOOST_TEST(clos.num() == -1);
  61                 BOOST_TEST(clos.message() == "Direct Init ");
  62             }
  63
  64             (std::cout << clos.message << clos.num << ", " << clos.real << '\n')();
  65             BOOST_TEST(clos.num() == 987);
  66             BOOST_TEST(clos.message() == "Abracadabra ");
  67         }
  68
  69         (std::cout << clos.message << clos.num << ", " << clos.real << '\n')();
  70         BOOST_TEST(clos.num() == 123+456);
  71         BOOST_TEST(clos.message() == "Hello " + std::string("World "));
  72     }
  73
  74     return boost::report_errors();
  75 }