1 | |
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_POINTER_HPP_INCLUDED |
10 | #define BOOST_TT_REMOVE_POINTER_HPP_INCLUDED |
11 | |
12 | #include <boost/config.hpp> |
13 | |
14 | #if defined(BOOST_MSVC) |
15 | #include <boost/type_traits/remove_cv.hpp> |
16 | #include <boost/type_traits/is_pointer.hpp> |
17 | #endif |
18 | |
19 | namespace boost { |
20 | |
21 | #ifdef BOOST_MSVC |
22 | |
23 | namespace detail{ |
24 | |
25 | // |
26 | // We need all this crazy indirection because a type such as: |
27 | // |
28 | // T (*const)(U) |
29 | // |
30 | // Does not bind to a <T*> or <T*const> partial specialization with VC10 and earlier |
31 | // |
32 | template <class T> |
33 | struct remove_pointer_imp |
34 | { |
35 | typedef T type; |
36 | }; |
37 | |
38 | template <class T> |
39 | struct remove_pointer_imp<T*> |
40 | { |
41 | typedef T type; |
42 | }; |
43 | |
44 | template <class T, bool b> |
45 | struct remove_pointer_imp3 |
46 | { |
47 | typedef typename remove_pointer_imp<typename boost::remove_cv<T>::type>::type type; |
48 | }; |
49 | |
50 | template <class T> |
51 | struct remove_pointer_imp3<T, false> |
52 | { |
53 | typedef T type; |
54 | }; |
55 | |
56 | template <class T> |
57 | struct remove_pointer_imp2 |
58 | { |
59 | typedef typename remove_pointer_imp3<T, ::boost::is_pointer<T>::value>::type type; |
60 | }; |
61 | } |
62 | |
63 | template <class T> struct remove_pointer{ typedef typename boost::detail::remove_pointer_imp2<T>::type type; }; |
64 | |
65 | #else |
66 | |
67 | template <class T> struct remove_pointer{ typedef T type; }; |
68 | template <class T> struct remove_pointer<T*>{ typedef T type; }; |
69 | template <class T> struct remove_pointer<T*const>{ typedef T type; }; |
70 | template <class T> struct remove_pointer<T*volatile>{ typedef T type; }; |
71 | template <class T> struct remove_pointer<T*const volatile>{ typedef T type; }; |
72 | |
73 | #endif |
74 | |
75 | } // namespace boost |
76 | |
77 | #endif // BOOST_TT_REMOVE_POINTER_HPP_INCLUDED |
78 | |