96 lines
3.0 KiB
HTML
96 lines
3.0 KiB
HTML
<!doctype HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<!--
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(C) Copyright 2002-10 Robert Ramey - http://www.rrsd.com .
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Use, modification and distribution is subject to the Boost Software
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License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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http://www.boost.org/LICENSE_1_0.txt)
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-->
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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<link rel="stylesheet" type="text/css" href="../../../boost.css">
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<link rel="stylesheet" type="text/css" href="style.css">
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<title>Serialization - Derivation from an Existing Archive</title>
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</head>
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<body link="#0000ff" vlink="#800080">
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<table border="0" cellpadding="7" cellspacing="0" width="100%" summary="header">
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<tr>
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<td valign="top" width="300">
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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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</td>
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<td valign="top">
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<h1 align="center">Serialization</h1>
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<h2 align="center">A Simple Logging Archive Class</h2>
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</td>
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</tr>
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</table>
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<hr>
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The purpose of this example is to help clarify the usage of the
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<a href="archives.html"><strong>Archive Concept</strong></a>
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so that one can implement his own archive classes.
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<a href="../example/simple_log_archive.hpp" target="simple_archive_hpp">
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<code>simple_log_archive.hpp</code></a> implements a simple but useful
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archive class. This class can be used to send any serializable types
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on an output text stream in a readable format. Usage of this facility
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is trivially easy:
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<pre><code>
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#include "simple_log_archive.hpp"
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...
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// display the complete schedule
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simple_log_archive log(std::cout);
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log << schedule;
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</code></pre>
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and it produces the following output
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<pre><code>
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schedule
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count 6
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item
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first
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driver bob
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hour 6
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minute 24
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second ->
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stops
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count 3
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item ->
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latitude
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degrees 34
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minutes 135
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seconds 52.56
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longitude
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degrees 134
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minutes 22
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seconds 78.3
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...
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</code></pre>
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The complete example is <a href="../example/demo_simple_log.cpp" target="demo_simple_log_cpp">
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<code>demo_simple_log.cpp</code></a>. Look at
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<a href="archive_reference.html#trivial">Trivial Archive</a> to get a
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better understanding of how this works.
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Also, note the following:
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<ul>
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<li>Only 160 lines of code.
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<li>Header only - linking with the serialization library not required.
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<li>Displays ALL <a href="serialization.html"><strong>Serializable</strong></a> types.
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<li>Lacks some features.
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<ul>
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<li>it will not display the data from the derived type given the pointer to a
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polymorphic base class. That is, only displays the information of the base class.
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To add that see the next example.
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<li>doesn't display information serialized as binary data
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</ul>
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</ul>
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<hr>
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<p><i>© Copyright <a href="http://www.rrsd.com">Robert Ramey</a> 2002-2010.
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Distributed under the Boost Software License, Version 1.0. (See
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accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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</i></p>
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</body>
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</html>
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