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

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