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1 | #ifndef BOOST_METAPARSE_V1_DEBUG_PARSING_ERROR_HPP |
2 | #define BOOST_METAPARSE_V1_DEBUG_PARSING_ERROR_HPP | |
3 | ||
4 | // Copyright Abel Sinkovics (abel@sinkovics.hu) 2011. | |
5 | // Distributed under the Boost Software License, Version 1.0. | |
6 | // (See accompanying file LICENSE_1_0.txt or copy at | |
7 | // http://www.boost.org/LICENSE_1_0.txt) | |
8 | ||
9 | #include <boost/metaparse/v1/fwd/build_parser.hpp> | |
10 | #include <boost/metaparse/v1/start.hpp> | |
11 | #include <boost/metaparse/v1/is_error.hpp> | |
12 | #include <boost/metaparse/v1/get_remaining.hpp> | |
13 | ||
14 | #include <boost/mpl/if.hpp> | |
15 | #include <boost/mpl/string.hpp> | |
16 | ||
17 | #include <iostream> | |
18 | #include <cstdlib> | |
19 | ||
20 | namespace boost | |
21 | { | |
22 | namespace metaparse | |
23 | { | |
24 | namespace v1 | |
25 | { | |
26 | template <class P, class S> | |
27 | class debug_parsing_error | |
28 | { | |
29 | public: | |
30 | debug_parsing_error() | |
31 | { | |
32 | using std::cout; | |
33 | using std::endl; | |
34 | using boost::mpl::c_str; | |
35 | ||
36 | typedef display<typename P::template apply<S, start>::type> runner; | |
37 | ||
38 | cout << "Compile-time parsing results" << endl; | |
39 | cout << "----------------------------" << endl; | |
40 | cout << "Input text:" << endl; | |
41 | cout << c_str<S>::type::value << endl; | |
42 | cout << endl; | |
43 | runner::run(); | |
44 | ||
45 | std::exit(0); | |
46 | } | |
47 | ||
48 | typedef debug_parsing_error type; | |
49 | private: | |
50 | template <class Result> | |
51 | struct display_error | |
52 | { | |
53 | static void run() | |
54 | { | |
55 | typedef typename Result::type R; | |
56 | ||
57 | std::cout | |
58 | << "Parsing failed:" << std::endl | |
59 | << "line " << get_line<typename R::source_position>::type::value | |
60 | << ", col " << get_col<typename R::source_position>::type::value | |
61 | << ": " | |
62 | << R::message::type::get_value() << std::endl; | |
63 | } | |
64 | }; | |
65 | ||
66 | template <class Result> | |
67 | struct display_no_error | |
68 | { | |
69 | static void run() | |
70 | { | |
71 | using std::cout; | |
72 | using std::endl; | |
73 | using boost::mpl::c_str; | |
74 | ||
75 | typedef typename get_remaining<Result>::type remaining_string; | |
76 | ||
77 | cout | |
78 | << "Parsing was successful. Remaining string is:" << endl | |
79 | << c_str<remaining_string>::type::value << endl; | |
80 | } | |
81 | }; | |
82 | ||
83 | template <class Result> | |
84 | struct display : | |
85 | boost::mpl::if_< | |
86 | typename is_error<Result>::type, | |
87 | display_error<Result>, | |
88 | display_no_error<Result> | |
89 | >::type | |
90 | {}; | |
91 | }; | |
92 | ||
93 | // Special case to handle when DebugParsingError is used with build_parser | |
94 | // (it shouldn't be) | |
95 | template <class P, class S> | |
96 | class debug_parsing_error<build_parser<P>, S> : | |
97 | debug_parsing_error<P, S> | |
98 | {}; | |
99 | } | |
100 | } | |
101 | } | |
102 | ||
103 | #endif | |
104 | ||
105 |