ceph/src/boost/libs/type_traits/include/boost/type_traits/remove_reference.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_REFERENCE_HPP_INCLUDED
  10 #define BOOST_TT_REMOVE_REFERENCE_HPP_INCLUDED
  11
  12 #include <boost/config.hpp>
  13 #include <boost/detail/workaround.hpp>
  14
  15 namespace boost {
  16
  17
  18 namespace detail{
  19 //
  20 // We can't filter out rvalue_references at the same level as
  21 // references or we get ambiguities from msvc:
  22 //
  23 template <class T>
  24 struct remove_rvalue_ref
  25 {
  26    typedef T type;
  27 };
  28 #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
  29 template <class T>
  30 struct remove_rvalue_ref<T&&>
  31 {
  32    typedef T type;
  33 };
  34 #endif
  35
  36 } // namespace detail
  37
  38 template <class T> struct remove_reference{ typedef typename boost::detail::remove_rvalue_ref<T>::type type; };
  39 template <class T> struct remove_reference<T&>{ typedef T type; };
  40
  41 #if defined(BOOST_ILLEGAL_CV_REFERENCES)
  42 // these are illegal specialisations; cv-qualifies applied to
  43 // references have no effect according to [8.3.2p1],
  44 // C++ Builder requires them though as it treats cv-qualified
  45 // references as distinct types...
  46 template <class T> struct remove_reference<T&const>{ typedef T type; };
  47 template <class T> struct remove_reference<T&volatile>{ typedef T type; };
  48 template <class T> struct remove_reference<T&const volatile>{ typedef T type; };
  49 #endif
  50
  51
  52 } // namespace boost
  53
  54 #endif // BOOST_TT_REMOVE_REFERENCE_HPP_INCLUDED