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1 | #ifndef BOOST_METAPARSE_V1_UTIL_UNLESS_ERROR_HPP |
2 | #define BOOST_METAPARSE_V1_UTIL_UNLESS_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/is_error.hpp> | |
10 | ||
11 | #include <boost/mpl/equal_to.hpp> | |
12 | #include <boost/mpl/eval_if.hpp> | |
13 | ||
14 | namespace boost | |
15 | { | |
16 | namespace metaparse | |
17 | { | |
18 | namespace v1 | |
19 | { | |
20 | template <class T, class NotErrorCase> | |
21 | struct unless_error : | |
22 | boost::mpl::eval_if<typename is_error<T>::type, T, NotErrorCase> | |
23 | {}; | |
24 | } | |
25 | } | |
26 | } | |
27 | ||
28 | #endif | |
29 |