1
2// (C) Copyright Dave Abrahams, Steve Cleary, Beman Dawes,
3// Howard Hinnant and John Maddock 2000.
4// (C) Copyright Mat Marcus, Jesse Jones and Adobe Systems Inc 2001
5
6// Use, modification and distribution are subject to the Boost Software License,
7// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
8// http://www.boost.org/LICENSE_1_0.txt).
9//
10// See http://www.boost.org/libs/type_traits for most recent version including documentation.
11
12// Fixed is_pointer, is_reference, is_const, is_volatile, is_same,
13// is_member_pointer based on the Simulated Partial Specialization work
14// of Mat Marcus and Jesse Jones. See http://opensource.adobe.com or
15// http://groups.yahoo.com/group/boost/message/5441
16// Some workarounds in here use ideas suggested from "Generic<Programming>:
17// Mappings between Types and Values"
18// by Andrei Alexandrescu (see http://www.cuj.com/experts/1810/alexandr.html).
19
20
21#ifndef BOOST_TT_IS_POINTER_HPP_INCLUDED
22#define BOOST_TT_IS_POINTER_HPP_INCLUDED
23
24#include <boost/type_traits/integral_constant.hpp>
25
26namespace boost {
27
28#if defined( __CODEGEARC__ )
29template <class T> struct is_pointer : public integral_constant<bool, __is_pointer(T)>{};
30#else
31template <class T> struct is_pointer : public false_type{};
32template <class T> struct is_pointer<T*> : public true_type{};
33template <class T> struct is_pointer<T*const> : public true_type{};
34template <class T> struct is_pointer<T*const volatile> : public true_type{};
35template <class T> struct is_pointer<T*volatile> : public true_type{};
36
37#ifdef BOOST_MSVC
38template <class T> struct is_pointer<T const> : public is_pointer<T>{};
39template <class T> struct is_pointer<T const volatile> : public is_pointer<T>{};
40template <class T> struct is_pointer<T volatile> : public is_pointer<T>{};
41#endif
42
43#endif
44
45} // namespace boost
46
47#endif // BOOST_TT_IS_POINTER_HPP_INCLUDED
48

source code of boost/boost/type_traits/is_pointer.hpp