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/is_member_pointer.hpp>
25#include <boost/type_traits/detail/ice_and.hpp>
26#include <boost/type_traits/detail/ice_not.hpp>
27#include <boost/type_traits/config.hpp>
28#include <boost/type_traits/remove_cv.hpp>
29
30
31// should be the last #include
32#include <boost/type_traits/detail/bool_trait_def.hpp>
33
34namespace boost {
35
36#if defined( __CODEGEARC__ )
37BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_pointer,T,__is_pointer(T))
38#else
39
40namespace detail {
41
42template< typename T > struct is_pointer_helper
43{
44 BOOST_STATIC_CONSTANT(bool, value = false);
45};
46
47# define TT_AUX_BOOL_TRAIT_HELPER_PARTIAL_SPEC(helper,sp,result) \
48template< typename T > struct helper<sp> \
49{ \
50 BOOST_STATIC_CONSTANT(bool, value = result); \
51}; \
52/**/
53
54TT_AUX_BOOL_TRAIT_HELPER_PARTIAL_SPEC(is_pointer_helper,T*,true)
55
56# undef TT_AUX_BOOL_TRAIT_HELPER_PARTIAL_SPEC
57
58template< typename T >
59struct is_pointer_impl
60{
61 BOOST_STATIC_CONSTANT(bool, value =
62 (::boost::type_traits::ice_and<
63 ::boost::detail::is_pointer_helper<typename remove_cv<T>::type>::value
64 , ::boost::type_traits::ice_not<
65 ::boost::is_member_pointer<T>::value
66 >::value
67 >::value)
68 );
69};
70
71} // namespace detail
72
73BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_pointer,T,::boost::detail::is_pointer_impl<T>::value)
74
75#if defined(__BORLANDC__) && !defined(__COMO__) && (__BORLANDC__ < 0x600)
76BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_pointer,T&,false)
77BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_pointer,T& const,false)
78BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_pointer,T& volatile,false)
79BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_pointer,T& const volatile,false)
80#endif
81
82#endif
83
84} // namespace boost
85
86#include <boost/type_traits/detail/bool_trait_undef.hpp>
87
88#endif // BOOST_TT_IS_POINTER_HPP_INCLUDED
89