ceph/src/boost/libs/spirit/classic/test/shortest_alternative_tests.cpp

   1 //
   2 //  Copyright (c) 2004 Joao Abecasis
   3 //
   4 //  Use, modification and distribution is subject to the Boost Software
   5 //  License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
   6 //  http://www.boost.org/LICENSE_1_0.txt)
   7 //
   8
   9 #include <boost/spirit/include/classic_core.hpp>
  10
  11 #include <boost/core/lightweight_test.hpp>
  12
  13 using namespace BOOST_SPIRIT_CLASSIC_NS;
  14
  15 void shortest_alternative_parser_test()
  16 {
  17     typedef
  18         shortest_alternative<
  19             shortest_alternative<
  20                 shortest_alternative<
  21                     strlit<>,
  22                     strlit<> >,
  23                 strlit<> >,
  24             strlit<> >
  25     parser_t;
  26
  27     parser_t short_rule =
  28         shortest_d[
  29             str_p("a")
  30             | str_p("aa")
  31             | str_p("aaa")
  32             | str_p("aaaa")
  33         ];
  34
  35     BOOST_TEST(parse("a", short_rule).full);
  36     BOOST_TEST(parse("aa", short_rule).length == 1);
  37     BOOST_TEST(parse("aaa", short_rule).length == 1);
  38     BOOST_TEST(parse("aaaa", short_rule).length == 1);
  39
  40     short_rule =
  41         shortest_d[
  42             str_p("d")
  43             | str_p("cd")
  44             | str_p("bcd")
  45             | str_p("abcd")
  46         ];
  47
  48     BOOST_TEST(parse("d", short_rule).full);
  49     BOOST_TEST(parse("cd", short_rule).full);
  50     BOOST_TEST(parse("bcd", short_rule).full);
  51     BOOST_TEST(parse("abcd", short_rule).full);
  52 }
  53
  54 int
  55 main()
  56 {
  57     shortest_alternative_parser_test();
  58     return boost::report_errors();
  59 }