ceph/src/boost/libs/spirit/test/qi/regression_repeat.cpp

   1 //  Copyright (c) 2001-2010 Hartmut Kaiser
   2 //  Copyright (c) 2010 Head Geek
   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 <boost/detail/lightweight_test.hpp>
   9 #include <boost/spirit/include/qi.hpp>
  10
  11 namespace qi = boost::spirit::qi;
  12 using qi::omit;
  13 using qi::repeat;
  14 using std::cout;
  15 using std::endl;
  16
  17 typedef qi::rule<std::string::const_iterator, std::string()> strrule_type;
  18
  19 void test(const std::string input, strrule_type rule, std::string result)
  20 {
  21     std::string target;
  22     std::string::const_iterator i = input.begin(), ie = input.end();
  23
  24     BOOST_TEST(qi::parse(i, ie, rule, target) && target == result);
  25 }
  26
  27 int main()
  28 {
  29     strrule_type obsolete_year =
  30         omit[-qi::char_(" \t")] >>
  31         repeat(2)[qi::digit] >>
  32         omit[-qi::char_(" \t")];
  33     strrule_type correct_year = repeat(4)[qi::digit];
  34
  35     test("1776", qi::hold[correct_year] | repeat(2)[qi::digit], "1776");
  36     test("76",   obsolete_year, "76");
  37     test("76",   qi::hold[obsolete_year] | correct_year, "76");
  38     test(" 76",  qi::hold[correct_year] | obsolete_year, "76");
  39     test("76",   qi::hold[correct_year] | obsolete_year, "76");
  40     test("76",   qi::hold[correct_year] | repeat(2)[qi::digit], "76");
  41
  42     return boost::report_errors();
  43 }
  44