// (C) Copyright Dave Abrahams, Steve Cleary, Beman Dawes, | |
// Howard Hinnant and John Maddock 2000. | |
// (C) Copyright Mat Marcus, Jesse Jones and Adobe Systems Inc 2001 | |
// Use, modification and distribution are subject to the Boost Software License, | |
// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at | |
// http://www.boost.org/LICENSE_1_0.txt). | |
// | |
// See http://www.boost.org/libs/type_traits for most recent version including documentation. | |
// Fixed is_pointer, is_reference, is_const, is_volatile, is_same, | |
// is_member_pointer based on the Simulated Partial Specialization work | |
// of Mat Marcus and Jesse Jones. See http://opensource.adobe.com or | |
// http://groups.yahoo.com/group/boost/message/5441 | |
// Some workarounds in here use ideas suggested from "Generic<Programming>: | |
// Mappings between Types and Values" | |
// by Andrei Alexandrescu (see http://www.cuj.com/experts/1810/alexandr.html). | |
#ifndef BOOST_TT_IS_POINTER_HPP_INCLUDED | |
#define BOOST_TT_IS_POINTER_HPP_INCLUDED | |
#include <boost/type_traits/is_member_pointer.hpp> | |
#include <boost/type_traits/detail/ice_and.hpp> | |
#include <boost/type_traits/detail/ice_not.hpp> | |
#include <boost/type_traits/config.hpp> | |
#if !BOOST_WORKAROUND(BOOST_MSVC,<=1300) | |
#include <boost/type_traits/remove_cv.hpp> | |
#endif | |
#ifdef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION | |
# include <boost/type_traits/is_reference.hpp> | |
# include <boost/type_traits/is_array.hpp> | |
# include <boost/type_traits/detail/is_function_ptr_tester.hpp> | |
# include <boost/type_traits/detail/false_result.hpp> | |
# include <boost/type_traits/detail/ice_or.hpp> | |
#endif | |
// should be the last #include | |
#include <boost/type_traits/detail/bool_trait_def.hpp> | |
namespace boost { | |
#if defined( __CODEGEARC__ ) | |
BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_pointer,T,__is_pointer(T)) | |
#elif !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) | |
namespace detail { | |
template< typename T > struct is_pointer_helper | |
{ | |
BOOST_STATIC_CONSTANT(bool, value = false); | |
}; | |
# define TT_AUX_BOOL_TRAIT_HELPER_PARTIAL_SPEC(helper,sp,result) \ | |
template< typename T > struct helper<sp> \ | |
{ \ | |
BOOST_STATIC_CONSTANT(bool, value = result); \ | |
}; \ | |
/**/ | |
TT_AUX_BOOL_TRAIT_HELPER_PARTIAL_SPEC(is_pointer_helper,T*,true) | |
# undef TT_AUX_BOOL_TRAIT_HELPER_PARTIAL_SPEC | |
template< typename T > | |
struct is_pointer_impl | |
{ | |
#if BOOST_WORKAROUND(BOOST_MSVC,<=1300) | |
BOOST_STATIC_CONSTANT(bool, value = | |
(::boost::type_traits::ice_and< | |
::boost::detail::is_pointer_helper<T>::value | |
, ::boost::type_traits::ice_not< | |
::boost::is_member_pointer<T>::value | |
>::value | |
>::value) | |
); | |
#else | |
BOOST_STATIC_CONSTANT(bool, value = | |
(::boost::type_traits::ice_and< | |
::boost::detail::is_pointer_helper<typename remove_cv<T>::type>::value | |
, ::boost::type_traits::ice_not< | |
::boost::is_member_pointer<T>::value | |
>::value | |
>::value) | |
); | |
#endif | |
}; | |
} // namespace detail | |
BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_pointer,T,::boost::detail::is_pointer_impl<T>::value) | |
#if defined(__BORLANDC__) && !defined(__COMO__) && (__BORLANDC__ < 0x600) | |
BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_pointer,T&,false) | |
BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_pointer,T& const,false) | |
BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_pointer,T& volatile,false) | |
BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_pointer,T& const volatile,false) | |
#endif | |
#else // no partial template specialization | |
namespace detail { | |
struct pointer_helper | |
{ | |
pointer_helper(const volatile void*); | |
}; | |
yes_type BOOST_TT_DECL is_pointer_tester(pointer_helper); | |
no_type BOOST_TT_DECL is_pointer_tester(...); | |
template <bool> | |
struct is_pointer_select | |
: ::boost::type_traits::false_result | |
{ | |
}; | |
template <> | |
struct is_pointer_select<false> | |
{ | |
template <typename T> struct result_ | |
{ | |
static T& make_t(); | |
BOOST_STATIC_CONSTANT(bool, value = | |
(::boost::type_traits::ice_or< | |
(1 == sizeof(is_pointer_tester(make_t()))), | |
(1 == sizeof(type_traits::is_function_ptr_tester(make_t()))) | |
>::value)); | |
}; | |
}; | |
template <typename T> | |
struct is_pointer_impl | |
: is_pointer_select< | |
::boost::type_traits::ice_or< | |
::boost::is_reference<T>::value | |
, ::boost::is_array<T>::value | |
>::value | |
>::template result_<T> | |
{ | |
}; | |
BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_pointer,void,false) | |
#ifndef BOOST_NO_CV_VOID_SPECIALIZATIONS | |
BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_pointer,void const,false) | |
BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_pointer,void volatile,false) | |
BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_pointer,void const volatile,false) | |
#endif | |
} // namespace detail | |
BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_pointer,T,::boost::detail::is_pointer_impl<T>::value) | |
#endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION | |
} // namespace boost | |
#include <boost/type_traits/detail/bool_trait_undef.hpp> | |
#endif // BOOST_TT_IS_POINTER_HPP_INCLUDED |