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<title>Serialization - Derivation from an Existing Archive</title>
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      <h3><a href="../../../index.htm"><img height="86" width="277" alt="C++ Boost" src="../../../boost.png" border="0"></a></h3>
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      <h1 align="center">Serialization</h1>
      <h2 align="center">A Simple Logging Archive Class</h2>
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<hr>
The purpose of this example is to help clarify the usage of the
<a href="archives.html"><strong>Archive Concept</strong></a> 
so that one can implement his own archive classes.  
<a href="../example/simple_log_archive.hpp" target="simple_archive_hpp">
<code>simple_log_archive.hpp</code></a> implements a simple but useful
archive class. This class can be used to send any serializable types
on an output text stream in a readable format. Usage of this facility
is trivially easy:

<pre><code>
#include "simple_log_archive.hpp"
...
// display the complete schedule
simple_log_archive log(std::cout);
log << schedule;
</code></pre>

and it produces the following output

<pre><code>
schedule 
 count 6
 item 
  first 
   driver bob
   hour 6
   minute 24
  second -> 
   stops 
    count 3
    item -> 
     latitude 
      degrees 34
      minutes 135
      seconds 52.56
     longitude 
      degrees 134
      minutes 22
      seconds 78.3
...
</code></pre>

The complete example is <a href="../example/demo_simple_log.cpp" target="demo_simple_log_cpp">
<code>demo_simple_log.cpp</code></a>.  Look at 
<a href="archive_reference.html#trivial">Trivial Archive</a> to get a 
better understanding of how this works.

Also, note the following:
<ul>
  <li>Only 160 lines of code.
  <li>Header only - linking with the serialization library not required.
  <li>Displays ALL <a href="serialization.html"><strong>Serializable</strong></a> types.
  <li>Lacks some features.
  <ul>
    <li>it will not display the data from the derived type given the pointer to a 
    polymorphic base class.  That is, only displays the information of the base class.
    To add that see the next example.
    <li>doesn't display information serialized as binary data
  </ul>
</ul>

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<p><i>&copy; Copyright <a href="http://www.rrsd.com">Robert Ramey</a> 2002-2010. 
Distributed under the Boost Software License, Version 1.0. (See
accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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