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
19namespace boost {
20
21#ifdef BOOST_MSVC
22
23namespace 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
63template <class T> struct remove_pointer{ typedef typename boost::detail::remove_pointer_imp2<T>::type type; };
64
65#else
66
67template <class T> struct remove_pointer{ typedef T type; };
68template <class T> struct remove_pointer<T*>{ typedef T type; };
69template <class T> struct remove_pointer<T*const>{ typedef T type; };
70template <class T> struct remove_pointer<T*volatile>{ typedef T type; };
71template <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