documentation update, added function exception::diagnostic_information, added std::exception to_string overload, removed tabs from source files

[SVN r46697]

include/boost/exception/diagnostic_information.hpp

@@ -0,0 +1,27 @@
+//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)
+
+#ifndef UUID_0552D49838DD11DD90146B8956D89593
+#define UUID_0552D49838DD11DD90146B8956D89593
+
+#include <boost/exception/exception.hpp>
+#include <exception>
+#include <string>
+
+namespace
+boost
+    {
+    inline
+    std::string
+    diagnostic_information( std::exception const & x )
+        {
+        if( exception const * be = dynamic_cast<exception const *>(&x) )
+            return be->diagnostic_information();
+        else
+            return std::string("[ what: ") + x.what() + ", type: " + typeid(x).name() + " ]";
+        }
+    }
+
+#endif