| Brian Silverman | 8867871 | 2018-08-04 23:56:48 -0700 | [diff] [blame^] | 1 | <!doctype HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> |
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| 4 | (C) Copyright 2002-10 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 | <head> |
| 10 | <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> |
| 11 | <link rel="stylesheet" type="text/css" href="../../../boost.css"> |
| 12 | <link rel="stylesheet" type="text/css" href="style.css"> |
| 13 | <title>Serialization - Derivation from an Existing Archive</title> |
| 14 | </head> |
| 15 | <body link="#0000ff" vlink="#800080"> |
| 16 | <table border="0" cellpadding="7" cellspacing="0" width="100%" summary="header"> |
| 17 | <tr> |
| 18 | <td valign="top" width="300"> |
| 19 | <h3><a href="../../../index.htm"><img height="86" width="277" alt="C++ Boost" src="../../../boost.png" border="0"></a></h3> |
| 20 | </td> |
| 21 | <td valign="top"> |
| 22 | <h1 align="center">Serialization</h1> |
| 23 | <h2 align="center">A Simple Logging Archive Class</h2> |
| 24 | </td> |
| 25 | </tr> |
| 26 | </table> |
| 27 | <hr> |
| 28 | The purpose of this example is to help clarify the usage of the |
| 29 | <a href="archives.html"><strong>Archive Concept</strong></a> |
| 30 | so that one can implement his own archive classes. |
| 31 | <a href="../example/simple_log_archive.hpp" target="simple_archive_hpp"> |
| 32 | <code>simple_log_archive.hpp</code></a> implements a simple but useful |
| 33 | archive class. This class can be used to send any serializable types |
| 34 | on an output text stream in a readable format. Usage of this facility |
| 35 | is trivially easy: |
| 36 | |
| 37 | <pre><code> |
| 38 | #include "simple_log_archive.hpp" |
| 39 | ... |
| 40 | // display the complete schedule |
| 41 | simple_log_archive log(std::cout); |
| 42 | log << schedule; |
| 43 | </code></pre> |
| 44 | |
| 45 | and it produces the following output |
| 46 | |
| 47 | <pre><code> |
| 48 | schedule |
| 49 | count 6 |
| 50 | item |
| 51 | first |
| 52 | driver bob |
| 53 | hour 6 |
| 54 | minute 24 |
| 55 | second -> |
| 56 | stops |
| 57 | count 3 |
| 58 | item -> |
| 59 | latitude |
| 60 | degrees 34 |
| 61 | minutes 135 |
| 62 | seconds 52.56 |
| 63 | longitude |
| 64 | degrees 134 |
| 65 | minutes 22 |
| 66 | seconds 78.3 |
| 67 | ... |
| 68 | </code></pre> |
| 69 | |
| 70 | The complete example is <a href="../example/demo_simple_log.cpp" target="demo_simple_log_cpp"> |
| 71 | <code>demo_simple_log.cpp</code></a>. Look at |
| 72 | <a href="archive_reference.html#trivial">Trivial Archive</a> to get a |
| 73 | better understanding of how this works. |
| 74 | |
| 75 | Also, note the following: |
| 76 | <ul> |
| 77 | <li>Only 160 lines of code. |
| 78 | <li>Header only - linking with the serialization library not required. |
| 79 | <li>Displays ALL <a href="serialization.html"><strong>Serializable</strong></a> types. |
| 80 | <li>Lacks some features. |
| 81 | <ul> |
| 82 | <li>it will not display the data from the derived type given the pointer to a |
| 83 | polymorphic base class. That is, only displays the information of the base class. |
| 84 | To add that see the next example. |
| 85 | <li>doesn't display information serialized as binary data |
| 86 | </ul> |
| 87 | </ul> |
| 88 | |
| 89 | <hr> |
| 90 | <p><i>© Copyright <a href="http://www.rrsd.com">Robert Ramey</a> 2002-2010. |
| 91 | Distributed under the Boost Software License, Version 1.0. (See |
| 92 | accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| 93 | </i></p> |
| 94 | </body> |
| 95 | </html> |