2 // (C) Copyright John Maddock 2005.
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.
10 #ifndef BOOST_TT_EXTENT_HPP_INCLUDED
11 #define BOOST_TT_EXTENT_HPP_INCLUDED
13 #include <cstddef> // size_t
14 #include <boost/type_traits/integral_constant.hpp>
15 #include <boost/detail/workaround.hpp>
21 #if defined( __CODEGEARC__ )
22 // wrap the impl as main trait provides additional MPL lambda support
23 template < typename T, std::size_t N >
25 static const std::size_t value = __array_extent(T, N);
30 template <class T, std::size_t N>
33 BOOST_STATIC_CONSTANT(std::size_t, value = 0);
35 #if !defined(BOOST_NO_ARRAY_TYPE_SPECIALIZATIONS)
36 template <class T, std::size_t R, std::size_t N>
37 struct extent_imp<T[R], N>
39 BOOST_STATIC_CONSTANT(std::size_t, value = (::boost::detail::extent_imp<T, N-1>::value));
42 template <class T, std::size_t R, std::size_t N>
43 struct extent_imp<T const[R], N>
45 BOOST_STATIC_CONSTANT(std::size_t, value = (::boost::detail::extent_imp<T, N-1>::value));
48 template <class T, std::size_t R, std::size_t N>
49 struct extent_imp<T volatile[R], N>
51 BOOST_STATIC_CONSTANT(std::size_t, value = (::boost::detail::extent_imp<T, N-1>::value));
54 template <class T, std::size_t R, std::size_t N>
55 struct extent_imp<T const volatile[R], N>
57 BOOST_STATIC_CONSTANT(std::size_t, value = (::boost::detail::extent_imp<T, N-1>::value));
60 template <class T, std::size_t R>
61 struct extent_imp<T[R],0>
63 BOOST_STATIC_CONSTANT(std::size_t, value = R);
66 template <class T, std::size_t R>
67 struct extent_imp<T const[R], 0>
69 BOOST_STATIC_CONSTANT(std::size_t, value = R);
72 template <class T, std::size_t R>
73 struct extent_imp<T volatile[R], 0>
75 BOOST_STATIC_CONSTANT(std::size_t, value = R);
78 template <class T, std::size_t R>
79 struct extent_imp<T const volatile[R], 0>
81 BOOST_STATIC_CONSTANT(std::size_t, value = R);
84 #if !BOOST_WORKAROUND(__BORLANDC__, < 0x600) && !defined(__IBMCPP__) && !BOOST_WORKAROUND(__DMC__, BOOST_TESTED_AT(0x840)) && !defined(__MWERKS__)
85 template <class T, std::size_t N>
86 struct extent_imp<T[], N>
88 BOOST_STATIC_CONSTANT(std::size_t, value = (::boost::detail::extent_imp<T, N-1>::value));
90 template <class T, std::size_t N>
91 struct extent_imp<T const[], N>
93 BOOST_STATIC_CONSTANT(std::size_t, value = (::boost::detail::extent_imp<T, N-1>::value));
95 template <class T, std::size_t N>
96 struct extent_imp<T volatile[], N>
98 BOOST_STATIC_CONSTANT(std::size_t, value = (::boost::detail::extent_imp<T, N-1>::value));
100 template <class T, std::size_t N>
101 struct extent_imp<T const volatile[], N>
103 BOOST_STATIC_CONSTANT(std::size_t, value = (::boost::detail::extent_imp<T, N-1>::value));
106 struct extent_imp<T[], 0>
108 BOOST_STATIC_CONSTANT(std::size_t, value = 0);
111 struct extent_imp<T const[], 0>
113 BOOST_STATIC_CONSTANT(std::size_t, value = 0);
116 struct extent_imp<T volatile[], 0>
118 BOOST_STATIC_CONSTANT(std::size_t, value = 0);
121 struct extent_imp<T const volatile[], 0>
123 BOOST_STATIC_CONSTANT(std::size_t, value = 0);
128 #endif // non-CodeGear implementation
131 template <class T, std::size_t N = 0>
133 : public ::boost::integral_constant<std::size_t, ::boost::detail::extent_imp<T,N>::value>
139 #endif // BOOST_TT_IS_MEMBER_FUNCTION_POINTER_HPP_INCLUDED