ceph/src/boost/boost/serialization/strong_typedef.hpp

   1 #ifndef BOOST_SERIALIZATION_STRONG_TYPEDEF_HPP
   2 #define BOOST_SERIALIZATION_STRONG_TYPEDEF_HPP
   3
   4 // MS compatible compilers support #pragma once
   5 #if defined(_MSC_VER)
   6 # pragma once
   7 #endif
   8
   9 /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
  10 // strong_typedef.hpp:
  11
  12 // (C) Copyright 2002 Robert Ramey - http://www.rrsd.com .
  13 // (C) Copyright 2016 Ashish Sadanandan
  14 // Use, modification and distribution is subject to the Boost Software
  15 // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  16 // http://www.boost.org/LICENSE_1_0.txt)
  17
  18 //  See http://www.boost.org/libs/serialization for updates, documentation, and revision history.
  19
  20 // macro used to implement a strong typedef.  strong typedef
  21 // guarentees that two types are distinguised even though the
  22 // share the same underlying implementation.  typedef does not create
  23 // a new type.  BOOST_STRONG_TYPEDEF(T, D) creates a new type named D
  24 // that operates as a type T.
  25
  26 #include <boost/config.hpp>
  27 #include <boost/operators.hpp>
  28 #include <boost/type_traits/has_nothrow_assign.hpp>
  29 #include <boost/type_traits/has_nothrow_constructor.hpp>
  30 #include <boost/type_traits/has_nothrow_copy.hpp>
  31
  32 #define BOOST_STRONG_TYPEDEF(T, D)                                                                               \
  33 struct D                                                                                                         \
  34     : boost::totally_ordered1< D                                                                                 \
  35     , boost::totally_ordered2< D, T                                                                              \
  36     > >                                                                                                          \
  37 {                                                                                                                \
  38     T t;                                                                                                         \
  39     explicit D(const T& t_) BOOST_NOEXCEPT_IF(boost::has_nothrow_copy_constructor<T>::value) : t(t_) {}          \
  40     D() BOOST_NOEXCEPT_IF(boost::has_nothrow_default_constructor<T>::value) : t() {}                             \
  41     D(const D & t_) BOOST_NOEXCEPT_IF(boost::has_nothrow_copy_constructor<T>::value) : t(t_.t) {}                \
  42     D& operator=(const D& rhs) BOOST_NOEXCEPT_IF(boost::has_nothrow_assign<T>::value) {t = rhs.t; return *this;} \
  43     D& operator=(const T& rhs) BOOST_NOEXCEPT_IF(boost::has_nothrow_assign<T>::value) {t = rhs; return *this;}   \
  44     operator const T&() const {return t;}                                                                        \
  45     operator T&() {return t;}                                                                                    \
  46     bool operator==(const D& rhs) const {return t == rhs.t;}                                                     \
  47     bool operator<(const D& rhs) const {return t < rhs.t;}                                                       \
  48 };
  49
  50 #endif // BOOST_SERIALIZATION_STRONG_TYPEDEF_HPP