boost exception

[SVN r43485]

example/enable_error_info.cpp

@@ -0,0 +1,35 @@
+//Copyright (c) 2006-2008 Emil Dotchevski and Reverge Studios, Inc.
+
+//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)
+
+//This example shows how to throw exception objects that support
+//transporting of arbitrary data to the catch site, even for types
+//that do not derive from boost::exception.
+
+#include <boost/exception.hpp>
+#include <stdexcept>
+
+typedef boost::error_info<struct tag_std_range_min,size_t> std_range_min;
+typedef boost::error_info<struct tag_std_range_max,size_t> std_range_max;
+typedef boost::error_info<struct tag_std_range_index,size_t> std_range_index;
+
+template <class T>
+class
+my_container
+	{
+	public:
+
+	size_t size() const;
+
+    T const &
+	operator[]( size_t i ) const
+		{
+        if( i > size() )
+            throw boost::enable_error_info(std::range_error("Index out of range")) <<
+                std_range_min(0) <<
+                std_range_max(size()) <<
+                std_range_index(i);
+		//....
+		}
+	};