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 #include <boost/detail/lightweight_test.hpp>
11
12 using namespace BOOST_SPIRIT_CLASSIC_NS;
13
shortest_alternative_parser_test()14 void shortest_alternative_parser_test()
15 {
16 typedef
17 shortest_alternative<
18 shortest_alternative<
19 shortest_alternative<
20 strlit<>,
21 strlit<> >,
22 strlit<> >,
23 strlit<> >
24 parser_t;
25
26 parser_t short_rule =
27 shortest_d[
28 str_p("a")
29 | str_p("aa")
30 | str_p("aaa")
31 | str_p("aaaa")
32 ];
33
34 BOOST_TEST(parse("a", short_rule).full);
35 BOOST_TEST(parse("aa", short_rule).length == 1);
36 BOOST_TEST(parse("aaa", short_rule).length == 1);
37 BOOST_TEST(parse("aaaa", short_rule).length == 1);
38
39 short_rule =
40 shortest_d[
41 str_p("d")
42 | str_p("cd")
43 | str_p("bcd")
44 | str_p("abcd")
45 ];
46
47 BOOST_TEST(parse("d", short_rule).full);
48 BOOST_TEST(parse("cd", short_rule).full);
49 BOOST_TEST(parse("bcd", short_rule).full);
50 BOOST_TEST(parse("abcd", short_rule).full);
51 }
52
53 int
main()54 main()
55 {
56 shortest_alternative_parser_test();
57 return boost::report_errors();
58 }
59