1 | |
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). |
6 | // |
7 | // See http://www.boost.org/libs/type_traits for most recent version including documentation. |
8 | |
9 | |
10 | #ifndef BOOST_TT_EXTENT_HPP_INCLUDED |
11 | #define BOOST_TT_EXTENT_HPP_INCLUDED |
12 | |
13 | #include <boost/type_traits/integral_constant.hpp> |
14 | #include <boost/detail/workaround.hpp> |
15 | |
16 | namespace boost { |
17 | |
18 | namespace detail{ |
19 | |
20 | #if defined( __CODEGEARC__ ) |
21 | // wrap the impl as main trait provides additional MPL lambda support |
22 | template < typename T, std::size_t N > |
23 | struct extent_imp { |
24 | static const std::size_t value = __array_extent(T, N); |
25 | }; |
26 | |
27 | #else |
28 | |
29 | template <class T, std::size_t N> |
30 | struct extent_imp |
31 | { |
32 | BOOST_STATIC_CONSTANT(std::size_t, value = 0); |
33 | }; |
34 | #if !defined(BOOST_NO_ARRAY_TYPE_SPECIALIZATIONS) |
35 | template <class T, std::size_t R, std::size_t N> |
36 | struct extent_imp<T[R], N> |
37 | { |
38 | BOOST_STATIC_CONSTANT(std::size_t, value = (::boost::detail::extent_imp<T, N-1>::value)); |
39 | }; |
40 | |
41 | template <class T, std::size_t R, std::size_t N> |
42 | struct extent_imp<T const[R], N> |
43 | { |
44 | BOOST_STATIC_CONSTANT(std::size_t, value = (::boost::detail::extent_imp<T, N-1>::value)); |
45 | }; |
46 | |
47 | template <class T, std::size_t R, std::size_t N> |
48 | struct extent_imp<T volatile[R], N> |
49 | { |
50 | BOOST_STATIC_CONSTANT(std::size_t, value = (::boost::detail::extent_imp<T, N-1>::value)); |
51 | }; |
52 | |
53 | template <class T, std::size_t R, std::size_t N> |
54 | struct extent_imp<T const volatile[R], N> |
55 | { |
56 | BOOST_STATIC_CONSTANT(std::size_t, value = (::boost::detail::extent_imp<T, N-1>::value)); |
57 | }; |
58 | |
59 | template <class T, std::size_t R> |
60 | struct extent_imp<T[R],0> |
61 | { |
62 | BOOST_STATIC_CONSTANT(std::size_t, value = R); |
63 | }; |
64 | |
65 | template <class T, std::size_t R> |
66 | struct extent_imp<T const[R], 0> |
67 | { |
68 | BOOST_STATIC_CONSTANT(std::size_t, value = R); |
69 | }; |
70 | |
71 | template <class T, std::size_t R> |
72 | struct extent_imp<T volatile[R], 0> |
73 | { |
74 | BOOST_STATIC_CONSTANT(std::size_t, value = R); |
75 | }; |
76 | |
77 | template <class T, std::size_t R> |
78 | struct extent_imp<T const volatile[R], 0> |
79 | { |
80 | BOOST_STATIC_CONSTANT(std::size_t, value = R); |
81 | }; |
82 | |
83 | #if !BOOST_WORKAROUND(__BORLANDC__, < 0x600) && !defined(__IBMCPP__) && !BOOST_WORKAROUND(__DMC__, BOOST_TESTED_AT(0x840)) && !defined(__MWERKS__) |
84 | template <class T, std::size_t N> |
85 | struct extent_imp<T[], N> |
86 | { |
87 | BOOST_STATIC_CONSTANT(std::size_t, value = (::boost::detail::extent_imp<T, N-1>::value)); |
88 | }; |
89 | template <class T, std::size_t N> |
90 | struct extent_imp<T const[], N> |
91 | { |
92 | BOOST_STATIC_CONSTANT(std::size_t, value = (::boost::detail::extent_imp<T, N-1>::value)); |
93 | }; |
94 | template <class T, std::size_t N> |
95 | struct extent_imp<T volatile[], N> |
96 | { |
97 | BOOST_STATIC_CONSTANT(std::size_t, value = (::boost::detail::extent_imp<T, N-1>::value)); |
98 | }; |
99 | template <class T, std::size_t N> |
100 | struct extent_imp<T const volatile[], N> |
101 | { |
102 | BOOST_STATIC_CONSTANT(std::size_t, value = (::boost::detail::extent_imp<T, N-1>::value)); |
103 | }; |
104 | template <class T> |
105 | struct extent_imp<T[], 0> |
106 | { |
107 | BOOST_STATIC_CONSTANT(std::size_t, value = 0); |
108 | }; |
109 | template <class T> |
110 | struct extent_imp<T const[], 0> |
111 | { |
112 | BOOST_STATIC_CONSTANT(std::size_t, value = 0); |
113 | }; |
114 | template <class T> |
115 | struct extent_imp<T volatile[], 0> |
116 | { |
117 | BOOST_STATIC_CONSTANT(std::size_t, value = 0); |
118 | }; |
119 | template <class T> |
120 | struct extent_imp<T const volatile[], 0> |
121 | { |
122 | BOOST_STATIC_CONSTANT(std::size_t, value = 0); |
123 | }; |
124 | #endif |
125 | #endif |
126 | |
127 | #endif // non-CodeGear implementation |
128 | } // ::boost::detail |
129 | |
130 | template <class T, std::size_t N = 0> |
131 | struct extent |
132 | : public ::boost::integral_constant<std::size_t, ::boost::detail::extent_imp<T,N>::value> |
133 | { |
134 | }; |
135 | |
136 | } // namespace boost |
137 | |
138 | #endif // BOOST_TT_IS_MEMBER_FUNCTION_POINTER_HPP_INCLUDED |
139 | |