ceph/src/boost/libs/align/include/boost/align/detail/element_type.hpp

   1 /*
   2 (c) 2015 Glen Joseph Fernandes
   3 <glenjofe -at- gmail.com>
   4
   5 Distributed under the Boost Software
   6 License, Version 1.0.
   7 http://boost.org/LICENSE_1_0.txt
   8 */
   9 #ifndef BOOST_ALIGN_DETAIL_ELEMENT_TYPE_HPP
  10 #define BOOST_ALIGN_DETAIL_ELEMENT_TYPE_HPP
  11
  12 #include <boost/config.hpp>
  13
  14 #if !defined(BOOST_NO_CXX11_HDR_TYPE_TRAITS)
  15 #include <type_traits>
  16 #else
  17 #include <cstddef>
  18 #endif
  19
  20 namespace boost {
  21 namespace alignment {
  22 namespace detail {
  23
  24 #if !defined(BOOST_NO_CXX11_HDR_TYPE_TRAITS)
  25 using std::remove_reference;
  26 using std::remove_all_extents;
  27 using std::remove_cv;
  28 #else
  29 template<class T>
  30 struct remove_reference {
  31     typedef T type;
  32 };
  33
  34 template<class T>
  35 struct remove_reference<T&> {
  36     typedef T type;
  37 };
  38
  39 #if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
  40 template<class T>
  41 struct remove_reference<T&&> {
  42     typedef T type;
  43 };
  44 #endif
  45
  46 template<class T>
  47 struct remove_all_extents {
  48     typedef T type;
  49 };
  50
  51 template<class T>
  52 struct remove_all_extents<T[]>
  53     : remove_all_extents<T> { };
  54
  55 template<class T, std::size_t N>
  56 struct remove_all_extents<T[N]>
  57     : remove_all_extents<T> { };
  58
  59 template<class T>
  60 struct remove_const {
  61     typedef T type;
  62 };
  63
  64 template<class T>
  65 struct remove_const<const T> {
  66     typedef T type;
  67 };
  68
  69 template<class T>
  70 struct remove_volatile {
  71     typedef T type;
  72 };
  73
  74 template<class T>
  75 struct remove_volatile<volatile T> {
  76     typedef T type;
  77 };
  78
  79 template<class T>
  80 struct remove_cv
  81     : remove_volatile<typename remove_const<T>::type> { };
  82 #endif
  83
  84 template<class T>
  85 struct element_type
  86     : remove_cv<typename remove_all_extents<typename
  87         remove_reference<T>::type>::type> { };
  88
  89 } /* .detail */
  90 } /* .alignment */
  91 } /* .boost */
  92
  93 #endif