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2 | // (C) Copyright Steve Cleary, Beman Dawes, Howard Hinnant & John Maddock 2000. | |
3 | // Use, modification and distribution are subject to the Boost Software License, | |
4 | // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at | |
5 | // http://www.boost.org/LICENSE_1_0.txt). | |
6 | // | |
7 | // See http://www.boost.org/libs/type_traits for most recent version including documentation. | |
8 | ||
9 | #ifndef BOOST_TT_REMOVE_REFERENCE_HPP_INCLUDED | |
10 | #define BOOST_TT_REMOVE_REFERENCE_HPP_INCLUDED | |
11 | ||
12 | #include <boost/config.hpp> | |
13 | #include <boost/detail/workaround.hpp> | |
14 | ||
15 | namespace boost { | |
16 | ||
17 | ||
18 | namespace detail{ | |
19 | // | |
20 | // We can't filter out rvalue_references at the same level as | |
21 | // references or we get ambiguities from msvc: | |
22 | // | |
23 | template <class T> | |
24 | struct remove_rvalue_ref | |
25 | { | |
26 | typedef T type; | |
27 | }; | |
28 | #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES | |
29 | template <class T> | |
30 | struct remove_rvalue_ref<T&&> | |
31 | { | |
32 | typedef T type; | |
33 | }; | |
34 | #endif | |
35 | ||
36 | } // namespace detail | |
37 | ||
38 | template <class T> struct remove_reference{ typedef typename boost::detail::remove_rvalue_ref<T>::type type; }; | |
39 | template <class T> struct remove_reference<T&>{ typedef T type; }; | |
40 | ||
41 | #if defined(BOOST_ILLEGAL_CV_REFERENCES) | |
42 | // these are illegal specialisations; cv-qualifies applied to | |
43 | // references have no effect according to [8.3.2p1], | |
44 | // C++ Builder requires them though as it treats cv-qualified | |
45 | // references as distinct types... | |
46 | template <class T> struct remove_reference<T&const>{ typedef T type; }; | |
47 | template <class T> struct remove_reference<T&volatile>{ typedef T type; }; | |
48 | template <class T> struct remove_reference<T&const volatile>{ typedef T type; }; | |
49 | #endif | |
50 | ||
51 | ||
52 | } // namespace boost | |
53 | ||
54 | #endif // BOOST_TT_REMOVE_REFERENCE_HPP_INCLUDED |