ceph/src/boost/boost/type_traits/remove_pointer.hpp

   1
   2 //  (C) Copyright Steve Cleary, Beman Dawes, Howard Hinnant & John Maddock 2000.
   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 #ifndef BOOST_TT_REMOVE_POINTER_HPP_INCLUDED
  10 #define BOOST_TT_REMOVE_POINTER_HPP_INCLUDED
  11
  12 #include <boost/config.hpp>
  13
  14 #if defined(BOOST_MSVC)
  15 #include <boost/type_traits/remove_cv.hpp>
  16 #include <boost/type_traits/is_pointer.hpp>
  17 #endif
  18
  19 namespace boost {
  20
  21 #if BOOST_WORKAROUND(BOOST_MSVC, < 1900)
  22
  23 namespace detail{
  24
  25    //
  26    // We need all this crazy indirection because a type such as:
  27    //
  28    // T (*const)(U)
  29    //
  30    // Does not bind to a <T*> or <T*const> partial specialization with VC10 and earlier
  31    //
  32    template <class T>
  33    struct remove_pointer_imp
  34    {
  35       typedef T type;
  36    };
  37
  38    template <class T>
  39    struct remove_pointer_imp<T*>
  40    {
  41       typedef T type;
  42    };
  43
  44    template <class T, bool b>
  45    struct remove_pointer_imp3
  46    {
  47       typedef typename remove_pointer_imp<typename boost::remove_cv<T>::type>::type type;
  48    };
  49
  50    template <class T>
  51    struct remove_pointer_imp3<T, false>
  52    {
  53       typedef T type;
  54    };
  55
  56    template <class T>
  57    struct remove_pointer_imp2
  58    {
  59       typedef typename remove_pointer_imp3<T, ::boost::is_pointer<T>::value>::type type;
  60    };
  61 }
  62
  63 template <class T> struct remove_pointer{ typedef typename boost::detail::remove_pointer_imp2<T>::type type; };
  64
  65 #else
  66
  67 template <class T> struct remove_pointer{ typedef T type; };
  68 template <class T> struct remove_pointer<T*>{ typedef T type; };
  69 template <class T> struct remove_pointer<T*const>{ typedef T type; };
  70 template <class T> struct remove_pointer<T*volatile>{ typedef T type; };
  71 template <class T> struct remove_pointer<T*const volatile>{ typedef T type; };
  72
  73 #endif
  74
  75 #if !defined(BOOST_NO_CXX11_TEMPLATE_ALIASES)
  76
  77    template <class T> using remove_pointer_t = typename remove_pointer<T>::type;
  78
  79 #endif
  80
  81 } // namespace boost
  82
  83 #endif // BOOST_TT_REMOVE_POINTER_HPP_INCLUDED