ceph/src/boost/libs/serialization/example/demo_pimpl_A.cpp

   1 /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
   2 // demo_pimpl_A.cpp
   3
   4 // (C) Copyright 2002 Robert Ramey - http://www.rrsd.com .
   5 // Use, modification and distribution is subject to the Boost Software
   6 // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
   7 // http://www.boost.org/LICENSE_1_0.txt)
   8
   9 #include <boost/archive/text_iarchive.hpp>
  10 #include <boost/archive/text_oarchive.hpp>
  11
  12 #include "demo_pimpl_A.hpp"
  13
  14 // "hidden" definition of class B
  15 struct B {
  16     int b;
  17     template<class Archive>
  18     void serialize(Archive & ar, const unsigned int /* file_version */){
  19         ar & b;
  20     }
  21 };
  22
  23 A::A() :
  24     pimpl(new B)
  25 {}
  26 A::~A(){
  27     delete pimpl;
  28 }
  29 // now we can define the serialization for class A
  30 template<class Archive>
  31 void A::serialize(Archive & ar, const unsigned int /* file_version */){
  32     ar & pimpl;
  33 }
  34
  35 // without the explicit instantiations below, the program will
  36 // fail to link for lack of instantiantiation of the above function
  37 // note: the following failed to fix link errors for vc 7.0 !
  38 template void A::serialize<boost::archive::text_iarchive>(
  39     boost::archive::text_iarchive & ar,
  40     const unsigned int file_version
  41 );
  42 template void A::serialize<boost::archive::text_oarchive>(
  43     boost::archive::text_oarchive & ar,
  44     const unsigned int file_version
  45 );