deps/boost_1_63_0/boost/serialization/assume_abstract.hpp

   1 #ifndef BOOST_SERIALIZATION_ASSUME_ABSTRACT_HPP
   2 #define BOOST_SERIALIZATION_ASSUME_ABSTRACT_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 // assume_abstract_class.hpp:
  11
  12 // (C) Copyright 2008 Robert Ramey
  13 // Use, modification and distribution is subject to the Boost Software
  14 // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  15 // http://www.boost.org/LICENSE_1_0.txt)
  16
  17 //  See http://www.boost.org for updates, documentation, and revision history.
  18
  19 // this is useful for compilers which don't support the boost::is_abstract
  20
  21 #include <boost/type_traits/is_abstract.hpp>
  22 #include <boost/mpl/bool_fwd.hpp>
  23
  24 #ifndef BOOST_NO_IS_ABSTRACT
  25
  26 // if there is an intrinsic is_abstract defined, we don't have to do anything
  27 #define BOOST_SERIALIZATION_ASSUME_ABSTRACT(T)
  28
  29 // but forward to the "official" is_abstract
  30 namespace boost {
  31 namespace serialization {
  32     template<class T>
  33     struct is_abstract : boost::is_abstract< T > {} ;
  34 } // namespace serialization
  35 } // namespace boost
  36
  37 #else
  38 // we have to "make" one
  39
  40 namespace boost {
  41 namespace serialization {
  42     template<class T>
  43     struct is_abstract : boost::false_type {};
  44 } // namespace serialization
  45 } // namespace boost
  46
  47 // define a macro to make explicit designation of this more transparent
  48 #define BOOST_SERIALIZATION_ASSUME_ABSTRACT(T)        \
  49 namespace boost {                                     \
  50 namespace serialization {                             \
  51 template<>                                            \
  52 struct is_abstract< T > : boost::true_type {};        \
  53 template<>                                            \
  54 struct is_abstract< const T > : boost::true_type {};  \
  55 }}                                                    \
  56 /**/
  57
  58 #endif // BOOST_NO_IS_ABSTRACT
  59
  60 #endif //BOOST_SERIALIZATION_ASSUME_ABSTRACT_HPP