cereal
A C++11 library for serialization
adapters.hpp
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1 
4 /*
5  Copyright (c) 2014, Randolph Voorhies, Shane Grant
6  All rights reserved.
7 
8  Redistribution and use in source and binary forms, with or without
9  modification, are permitted provided that the following conditions are met:
10  * Redistributions of source code must retain the above copyright
11  notice, this list of conditions and the following disclaimer.
12  * Redistributions in binary form must reproduce the above copyright
13  notice, this list of conditions and the following disclaimer in the
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22  DISCLAIMED. IN NO EVENT SHALL RANDOLPH VOORHIES OR SHANE GRANT BE LIABLE FOR ANY
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29 */
30 #ifndef CEREAL_ARCHIVES_ADAPTERS_HPP_
31 #define CEREAL_ARCHIVES_ADAPTERS_HPP_
32 
34 #include <utility>
35 
36 namespace cereal
37 {
38  #ifdef CEREAL_FUTURE_EXPERIMENTAL
39 
40  // Forward declaration for friend access
41  template <class U, class A> U & get_user_data( A & );
42 
44 
108  template <class UserData, class Archive>
109  class UserDataAdapter : public Archive
110  {
111  public:
113 
119  template <class ... Args>
120  UserDataAdapter( UserData & ud, Args && ... args ) :
121  Archive( std::forward<Args>( args )... ),
122  userdata( ud )
123  { }
124 
125  private:
127  void rtti() {}
128  friend UserData & get_user_data<UserData>( Archive & ar );
129  UserData & userdata;
130  };
131 
133 
148  template <class UserData, class Archive>
149  UserData & get_user_data( Archive & ar )
150  {
151  try
152  {
153  return dynamic_cast<UserDataAdapter<UserData, Archive> &>( ar ).userdata;
154  }
155  catch( std::bad_cast const & )
156  {
157  throw ::cereal::Exception("Attempting to get user data from archive not wrapped in UserDataAdapter");
158  }
159  }
160  #endif // CEREAL_FUTURE_EXPERIMENTAL
161 } // namespace cereal
162 
163 #endif // CEREAL_ARCHIVES_ADAPTERS_HPP_
STL namespace.
Internal helper functionality.
Definition: access.hpp:40