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1 | #ifndef BOOST_METAPARSE_V1_CPP11_IMPL_REMOVE_TRAILING_NO_CHARS_HPP |
2 | #define BOOST_METAPARSE_V1_CPP11_IMPL_REMOVE_TRAILING_NO_CHARS_HPP | |
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3 | |
4 | // Copyright Abel Sinkovics (abel@sinkovics.hu) 2013. | |
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 | ||
b32b8144 FG |
9 | #include <boost/metaparse/v1/cpp11/string.hpp> |
10 | #include <boost/metaparse/v1/impl/no_char.hpp> | |
11 | #include <boost/metaparse/v1/cpp11/impl/push_front_c.hpp> | |
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12 | |
13 | namespace boost | |
14 | { | |
15 | namespace metaparse | |
16 | { | |
17 | namespace v1 | |
18 | { | |
19 | namespace impl | |
20 | { | |
21 | template <class S> | |
22 | struct remove_trailing_no_chars : S {}; | |
23 | ||
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24 | // this code assumes that BOOST_NO_CHARs are at the end of the string |
25 | template <char... Cs> | |
26 | struct remove_trailing_no_chars<string<BOOST_NO_CHAR, Cs...>> : | |
27 | string<> | |
28 | {}; | |
29 | ||
30 | template <char C, char... Cs> | |
31 | struct remove_trailing_no_chars<string<C, Cs...>> : | |
32 | push_front_c<typename remove_trailing_no_chars<string<Cs...>>::type,C> | |
33 | {}; | |
34 | ||
35 | #ifdef _MSC_VER | |
36 | /* | |
37 | * These specialisations are needed to avoid an internal compiler error | |
38 | * in Visual C++ 12 | |
39 | */ | |
40 | template <char C> | |
41 | struct remove_trailing_no_chars<string<C>> : string<C> {}; | |
42 | ||
43 | template <> | |
44 | struct remove_trailing_no_chars<string<BOOST_NO_CHAR>> : string<> {}; | |
45 | ||
46 | template <> | |
47 | struct remove_trailing_no_chars<string<>> : string<> {}; | |
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48 | #endif |
49 | } | |
50 | } | |
51 | } | |
52 | } | |
53 | ||
54 | #endif | |
55 |