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+<html>
+<head>
+<!-- Generated by the Spirit (http://spirit.sf.net) C++ to HTML Converter -->
+<title>
+logic_to_system.cpp</title>
+<link rel="stylesheet" href="../../../Documentation/Style/CXX.css" type="text/css"></head>
+<body>
+<pre>
+<span class=comment>// file : Example/ExH/LogicToSystem/logic_to_system.cpp
+// author : Boris Kolpackov &lt;boris@kolpackov.net&gt;
+// copyright : Copyright (c) 2002-2003 Boris Kolpackov
+// license : http://kolpackov.net/license.html
+
+</span><span class=preprocessor>#include &quot;Utility/ExH/System/Exception.hpp&quot;
+</span><span class=preprocessor>#include &quot;Utility/ExH/Logic/Exception.hpp&quot;
+
+</span><span class=preprocessor>#include &lt;iostream&gt;
+
+</span><span class=keyword>using </span><span class=identifier>std</span><span class=special>::</span><span class=identifier>cerr</span><span class=special>;
+</span><span class=keyword>using </span><span class=identifier>std</span><span class=special>::</span><span class=identifier>endl</span><span class=special>;
+
+
+</span><span class=keyword>struct </span><span class=identifier>SubsystemA
+</span><span class=special>{
+ </span><span class=keyword>class </span><span class=identifier>Exception </span><span class=special>: </span><span class=keyword>public </span><span class=identifier>Utility</span><span class=special>::</span><span class=identifier>ExH</span><span class=special>::</span><span class=identifier>Logic</span><span class=special>::</span><span class=identifier>Exception </span><span class=special>{};
+
+ </span><span class=keyword>void
+ </span><span class=identifier>foo </span><span class=special>() </span><span class=keyword>throw </span><span class=special>(</span><span class=identifier>Exception</span><span class=special>)
+ </span><span class=special>{
+ </span><span class=keyword>throw </span><span class=identifier>Exception </span><span class=special>();
+ </span><span class=special>}
+</span><span class=special>};
+
+
+</span><span class=keyword>struct </span><span class=identifier>SubsystemB
+</span><span class=special>{
+ </span><span class=keyword>void
+ </span><span class=identifier>foo </span><span class=special>() </span><span class=keyword>throw </span><span class=special>(</span><span class=identifier>Utility</span><span class=special>::</span><span class=identifier>ExH</span><span class=special>::</span><span class=identifier>System</span><span class=special>::</span><span class=identifier>Exception</span><span class=special>)
+ </span><span class=special>{
+ </span><span class=identifier>SubsystemA </span><span class=identifier>a</span><span class=special>;
+ </span><span class=identifier>a</span><span class=special>.</span><span class=identifier>foo </span><span class=special>();
+
+ </span><span class=comment>// Here SubsystemB is using SunsystemA but cannot (forgot, doesnt't
+ // want to, doesn't know how to, etc - pick your favorite) handle
+ // exception thrown by SubsystemA. As a result exception is
+ // 'converted' to System::Exception.
+ </span><span class=special>}
+</span><span class=special>};
+
+
+</span><span class=keyword>int
+</span><span class=identifier>main </span><span class=special>()
+</span><span class=special>{
+ </span><span class=keyword>try
+ </span><span class=special>{
+ </span><span class=identifier>SubsystemB </span><span class=identifier>b</span><span class=special>;
+ </span><span class=identifier>b</span><span class=special>.</span><span class=identifier>foo </span><span class=special>();
+ </span><span class=special>}
+ </span><span class=keyword>catch </span><span class=special>(</span><span class=identifier>Utility</span><span class=special>::</span><span class=identifier>ExH</span><span class=special>::</span><span class=identifier>System</span><span class=special>::</span><span class=identifier>Exception </span><span class=keyword>const</span><span class=special>&amp; </span><span class=identifier>ex</span><span class=special>)
+ </span><span class=special>{
+ </span><span class=identifier>cerr </span><span class=special>&lt;&lt; </span><span class=string>&quot;Caught Utility::ExH::System::Exception: &quot;
+ </span><span class=special>&lt;&lt; </span><span class=identifier>ex</span><span class=special>.</span><span class=identifier>what </span><span class=special>()
+ </span><span class=special>&lt;&lt; </span><span class=identifier>endl</span><span class=special>;
+ </span><span class=special>}
+</span><span class=special>}
+</span></pre>
+</body>
+</html>
+<!-- $Id$ -->