added poco_unexpected() macro invoking Bugcheck::unexpected() to deal with unexpected exceptions in destructors

Foundation/include/Poco/Bugcheck.h

@@ -33,8 +33,8 @@ namespace Poco {
 class Foundation_API Bugcheck
 	/// This class provides some static methods that are
 	/// used by the
-	/// poco_assert_dbg(), poco_assert(), poco_check_ptr() 
-	/// and poco_bugcheck() macros. 
+	/// poco_assert_dbg(), poco_assert(), poco_check_ptr(), 
+	/// poco_bugcheck() and poco_unexpected() macros. 
 	/// You should not invoke these methods
 	/// directly. Use the macros instead, as they
 	/// automatically provide useful context information.
@@ -56,6 +56,12 @@ public:
 		/// An internal error was encountered. Break into the debugger, if
 		/// possible, then throw an BugcheckException.
 
+	static void unexpected(const char* file, int line);
+		/// An exception was caught in a destructor. Break into debugger,
+		/// if possible and report exception. Must only be called from
+		/// within a catch () block as it rethrows the exception to
+		/// determine its class.
+
 	static void debugger(const char* file, int line);
 		/// An internal error was encountered. Break into the debugger, if
 		/// possible.
@@ -99,6 +105,10 @@ protected:
 	Poco::Bugcheck::bugcheck(msg, __FILE__, __LINE__)
 	
 	
+#define poco_unexpected() \
+	Poco::Bugcheck::unexpected(__FILE__, __LINE__);
+
+
 #define poco_debugger() \
 	Poco::Bugcheck::debugger(__FILE__, __LINE__)
 

Foundation/src/Bugcheck.cpp

@@ -57,6 +57,35 @@ void Bugcheck::bugcheck(const char* msg, const char* file, int line)
 }
 
 
+void Bugcheck::unexpected(const char* file, int line)
+{
+	try
+	{
+		std::string msg("Caught exception in destructor: ");
+		try
+		{
+			throw;
+		}
+		catch (Poco::Exception& exc)
+		{
+			msg += exc.displayText();
+		}
+		catch (std::exception& exc)
+		{
+			msg += exc.what();
+		}
+		catch (...)
+		{
+			msg += "unknown exception";
+		}
+		Debugger::enter(msg, file, line);
+	}
+	catch (...)
+	{
+	}	
+}
+
+
 void Bugcheck::debugger(const char* file, int line)
 {
 	Debugger::enter(file, line);
@@ -78,6 +107,4 @@ std::string Bugcheck::what(const char* msg, const char* file, int line)
 }
 
 
-
-
 } // namespace Poco