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1 | #ifndef BOOST_METAPARSE_V1_EXCEPT_HPP | |
2 | #define BOOST_METAPARSE_V1_EXCEPT_HPP | |
3 | ||
4 | // Copyright Abel Sinkovics (abel@sinkovics.hu) 2009 - 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/is_error.hpp> | |
10 | #include <boost/metaparse/v1/accept.hpp> | |
11 | #include <boost/metaparse/v1/reject.hpp> | |
12 | ||
13 | #include <boost/mpl/if.hpp> | |
14 | ||
15 | namespace boost | |
16 | { | |
17 | namespace metaparse | |
18 | { | |
19 | namespace v1 | |
20 | { | |
21 | template <class P, class Result, class ErrorMsg> | |
22 | struct except | |
23 | { | |
24 | typedef except type; | |
25 | ||
26 | template <class S, class Pos> | |
27 | struct apply : | |
28 | boost::mpl::if_< | |
29 | is_error<typename P::template apply<S, Pos> >, | |
30 | accept<Result, S, Pos>, | |
31 | reject<ErrorMsg, Pos> | |
32 | > | |
33 | {}; | |
34 | }; | |
35 | } | |
36 | } | |
37 | } | |
38 | ||
39 | #endif | |
40 |