ceph/src/boost/libs/spirit/test/support/regression_multi_pass_error_handler.cpp

   1 //  Copyright (c) 2001-2010 Hartmut Kaiser
   2 //  Copyright (c) 2011 Laurent Gomila
   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 #include <boost/phoenix/operator.hpp>
   9 #include <boost/spirit/include/support_multi_pass.hpp>
  10 #include <boost/core/lightweight_test.hpp>
  11 #include <sstream>
  12 #include <iostream>
  13 #include <iterator>
  14 #include <string>
  15
  16 using namespace boost::spirit;
  17 using namespace boost;
  18
  19 int main()
  20 {
  21     {
  22         std::string input("5x");
  23         std::istringstream iss(input);
  24
  25         typedef std::istreambuf_iterator<char> base_iterator_type;
  26         typedef multi_pass<base_iterator_type> iterator_type;
  27
  28         iterator_type first = make_default_multi_pass(base_iterator_type(iss));
  29         iterator_type last  = make_default_multi_pass(base_iterator_type());
  30
  31         std::ostringstream oss;
  32
  33         qi::rule<iterator_type> r = qi::int_ > qi::int_;
  34         qi::on_error<qi::fail>(r, phoenix::ref(oss) << phoenix::val("error"));
  35
  36         BOOST_TEST(!qi::parse(first, last, r));
  37         BOOST_TEST(oss.str() == "error");
  38     }
  39
  40     {
  41         std::string input("5x");
  42         std::istringstream iss(input);
  43
  44         typedef std::istreambuf_iterator<char> base_iterator_type;
  45         typedef multi_pass<base_iterator_type> iterator_type;
  46
  47         iterator_type first = make_default_multi_pass(base_iterator_type(iss));
  48         iterator_type last  = make_default_multi_pass(base_iterator_type());
  49
  50         std::ostringstream oss;
  51
  52         qi::rule<iterator_type> r1 = qi::int_ > qi::int_;
  53         qi::rule<iterator_type> r2 = qi::int_ > qi::char_;
  54         qi::on_error<qi::fail>(r1, phoenix::ref(oss) << phoenix::val("error in r1"));
  55         qi::on_error<qi::fail>(r2, phoenix::ref(oss) << phoenix::val("error in r2"));
  56
  57         BOOST_TEST(qi::parse(first, last, r1 | r2));
  58         BOOST_TEST(oss.str() == "error in r1");
  59     }
  60
  61     return boost::report_errors();
  62 }
  63