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