ceph/src/boost/libs/spirit/repository/example/qi/distinct.cpp

   1 //  Copyright (c) 2001-2010 Hartmut Kaiser
   2 //
   3 //  Distributed under the Boost Software License, Version 1.0. (See accompanying
   4 //  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   5
   6 //  The purpose of this example is to demonstrate different use cases for the
   7 //  distinct parser.
   8
   9 #include <iostream>
  10 #include <string>
  11 #include <vector>
  12
  13 //[qi_distinct_includes
  14 #include <boost/spirit/include/qi.hpp>
  15 #include <boost/spirit/repository/include/qi_distinct.hpp>
  16 //]
  17
  18 //[qi_distinct_namespace
  19 using namespace boost::spirit;
  20 using namespace boost::spirit::ascii;
  21 using boost::spirit::repository::distinct;
  22 //]
  23
  24 int main()
  25 {
  26     //[qi_distinct_description_ident
  27     {
  28         std::string str("description ident");
  29         std::string::iterator first(str.begin());
  30         bool r = qi::phrase_parse(first, str.end()
  31           , distinct(alnum | '_')["description"] >> -lit("--") >> +(alnum | '_')
  32           , space);
  33         BOOST_ASSERT(r && first == str.end());
  34     }
  35     //]
  36
  37     //[qi_distinct_description__ident
  38     {
  39         std::string str("description--ident");
  40         std::string::iterator first(str.begin());
  41         bool r = qi::phrase_parse(first, str.end()
  42           , distinct(alnum | '_')["description"] >> -lit("--") >> +(alnum | '_')
  43           , space);
  44         BOOST_ASSERT(r && first == str.end());
  45     }
  46     //]
  47
  48     //[qi_distinct_description_ident_error
  49     {
  50         std::string str("description-ident");
  51         std::string::iterator first(str.begin());
  52         bool r = qi::phrase_parse(first, str.end()
  53           , distinct(alnum | '_')["description"] >> -lit("--") >> +(alnum | '_')
  54           , space);
  55         BOOST_ASSERT(!r && first == str.begin());
  56     }
  57     //]
  58
  59     return 0;
  60 }