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) && (_MSC_VER >= 1020)
   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
  23 #ifndef BOOST_NO_IS_ABSTRACT
  24
  25 // if there is an intrinsic is_abstract defined, we don't have to do anything
  26 #define BOOST_SERIALIZATION_ASSUME_ABSTRACT(T)
  27
  28 // but forward to the "official" is_abstract
  29 namespace boost {
  30 namespace serialization {
  31     template<class T>
  32     struct is_abstract : boost::is_abstract<T> {} ;
  33 } // namespace serialization
  34 } // namespace boost
  35
  36 #else
  37 // we have to "make" one
  38
  39 namespace boost {
  40 namespace serialization {
  41     template<class T>
  42     struct is_abstract : boost::false_type {};
  43 } // namespace serialization
  44 } // namespace boost
  45
  46 // define a macro to make explicit designation of this more transparent
  47 #define BOOST_SERIALIZATION_ASSUME_ABSTRACT(T)        \
  48 namespace boost {                                     \
  49 namespace serialization {                             \
  50 template<>                                            \
  51 struct is_abstract< T > : boost::true_type {};        \
  52 template<>                                            \
  53 struct is_abstract< const T > : boost::true_type {};  \
  54 }}                                                    \
  55 /**/
  56
  57 #endif // BOOST_NO_IS_ABSTRACT
  58
  59 #endif //BOOST_SERIALIZATION_ASSUME_ABSTRACT_HPP