ceph/src/boost/libs/spirit/classic/phoenix/example/fundamental/closures.cpp

   1 /*=============================================================================
   2     Phoenix V1.2.1
   3     Copyright (c) 2001-2003 Joel de Guzman
   4
   5     Use, modification and distribution is subject to the Boost Software
   6     License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
   7     http://www.boost.org/LICENSE_1_0.txt)
   8 ==============================================================================*/
   9 #include <vector>
  10 #include <algorithm>
  11 #include <iostream>
  12 #include <cassert>
  13
  14 #define PHOENIX_LIMIT 15
  15 #include <boost/spirit/include/phoenix1_operators.hpp>
  16 #include <boost/spirit/include/phoenix1_primitives.hpp>
  17 #include <boost/spirit/include/phoenix1_composite.hpp>
  18 #include <boost/spirit/include/phoenix1_special_ops.hpp>
  19 #include <boost/spirit/include/phoenix1_statements.hpp>
  20 #include <boost/spirit/include/phoenix1_functions.hpp>
  21 #include <boost/spirit/include/phoenix1_closures.hpp>
  22
  23 //////////////////////////////////
  24 using namespace phoenix;
  25
  26 //////////////////////////////////
  27 int
  28 main()
  29 {
  30     struct my_closure : closure<int, std::string, double> {
  31
  32         member1 num;
  33         member2 message;
  34         member3 real;
  35     };
  36
  37     my_closure clos;
  38
  39     {   //  First stack frame
  40         closure_frame<my_closure::self_t> frame(clos);
  41         (clos.num = 123)();
  42         (clos.num += 456)();
  43         (clos.real = clos.num / 56.5)();
  44         (clos.message = "Hello " + std::string("World "))();
  45
  46         {   //  Second stack frame
  47             closure_frame<my_closure::self_t> frame(clos);
  48             (clos.num = 987)();
  49             (clos.message = "Abracadabra ")();
  50             (clos.real = clos.num * 1e30)();
  51
  52             {   //  Third stack frame
  53                 tuple<int, char const*, double> init(-1, "Direct Init ", 3.14);
  54                 closure_frame<my_closure::self_t> frame(clos, init);
  55
  56                 (std::cout << clos.message << clos.num << ", " << clos.real << '\n')();
  57             }
  58
  59             (std::cout << clos.message << clos.num << ", " << clos.real << '\n')();
  60         }
  61
  62         (std::cout << clos.message << clos.num << ", " << clos.real << '\n')();
  63     }
  64
  65     return 0;
  66 }