ceph/src/boost/libs/spirit/example/qi/german_floating_point.cpp

   1 //  Copyright (c) 2001-2011 Hartmut Kaiser
   2 //  Copyright (c) 2011 Michael Caisse
   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 <boost/spirit/include/qi.hpp>
   8
   9 namespace qi = boost::spirit::qi;
  10
  11 template <typename T>
  12 struct german_real_policies : qi::real_policies<T>
  13 {
  14     template <typename Iterator>
  15     static bool parse_dot(Iterator& first, Iterator const& last)
  16     {
  17         if (first == last || *first != ',')
  18             return false;
  19         ++first;
  20         return true;
  21     }
  22 };
  23
  24 qi::real_parser<double, german_real_policies<double> > const german_double;
  25
  26 ///////////////////////////////////////////////////////////////////////////////
  27 int main()
  28 {
  29     std::string input("123,456");
  30     std::string::iterator begin = input.begin();
  31     std::string::iterator end = input.end();
  32
  33     double value = 0;
  34     if (!qi::parse(begin, end, german_double, value))
  35     {
  36         std::cout << "-------------------------------- \n";
  37         std::cout << "Parsing failed\n";
  38         std::cout << "-------------------------------- \n";
  39     }
  40     else
  41     {
  42         std::cout << "-------------------------------- \n";
  43         std::cout << "Parsing succeeded, got: " << value << "\n";
  44         std::cout << "---------------------------------\n";
  45     }
  46     return 0;
  47 }
  48