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).
7 // See http://www.boost.org/libs/type_traits for most recent version including documentation.
9 #ifndef BOOST_TT_REMOVE_POINTER_HPP_INCLUDED
10 #define BOOST_TT_REMOVE_POINTER_HPP_INCLUDED
12 #include <boost/config.hpp>
13 #include <boost/config/workaround.hpp>
15 #if defined(BOOST_MSVC)
16 #include <boost/type_traits/remove_cv.hpp>
17 #include <boost/type_traits/is_pointer.hpp>
22 #if BOOST_WORKAROUND(BOOST_MSVC, < 1900)
27 // We need all this crazy indirection because a type such as:
31 // Does not bind to a <T*> or <T*const> partial specialization with VC10 and earlier
34 struct remove_pointer_imp
40 struct remove_pointer_imp<T*>
45 template <class T, bool b>
46 struct remove_pointer_imp3
48 typedef typename remove_pointer_imp<typename boost::remove_cv<T>::type>::type type;
52 struct remove_pointer_imp3<T, false>
58 struct remove_pointer_imp2
60 typedef typename remove_pointer_imp3<T, ::boost::is_pointer<T>::value>::type type;
64 template <class T> struct remove_pointer{ typedef typename boost::detail::remove_pointer_imp2<T>::type type; };
68 template <class T> struct remove_pointer{ typedef T type; };
69 template <class T> struct remove_pointer<T*>{ typedef T type; };
70 template <class T> struct remove_pointer<T*const>{ typedef T type; };
71 template <class T> struct remove_pointer<T*volatile>{ typedef T type; };
72 template <class T> struct remove_pointer<T*const volatile>{ typedef T type; };
76 #if !defined(BOOST_NO_CXX11_TEMPLATE_ALIASES)
78 template <class T> using remove_pointer_t = typename remove_pointer<T>::type;
84 #endif // BOOST_TT_REMOVE_POINTER_HPP_INCLUDED