> I have a static method in a class that parses a text string.
> It basically breaks the text string down into segments and then calls
> further static methods to do what it has to with those segments. If
> any part of the parsing fails in those sub-methods, they throw a user
> exception using AfxThrowUserException().
>
> Then, the main static Parsing method catches the user exception, and
> assigns the return value to be FALSE. Hence the main calling code
> displays an error message to the user saying that parsing failed.
>
> That works fine. The question is, how do I go about having an
> exception thrown that is exactly the same, but lets me give it some
> kind of error value. Eg:
>
> If(!parsestring(string, structure, myownexception)) {
> display error message myownexception.geterrorno }
>
> I don't even know if I need to go this far. Can I simply use
> SetLastError and GetLastError using my own values? I have used
> GetLastError before, but only on system methods that use it.
You can use SetLastError and GetLastError, but I don't suggest them. I
suggest you just feed an error code into the exception, like:
enum ExceptionCode
{
// ...
};
class Exception
{
public:
Exception(ExceptionCode code)
: m_code( code )
{
}
ExceptionCode GetCode() const
{
return m_code;
}
private:
ExceptionCode m_code;
};
void parser_internal()
{
if (something_bad())
{
throw Exception( theErrorCode );
}
}
void parser_external()
{
try
{
parser_internal();
}
catch (Exception & ex)
{
ExceptionCode = ex.GetCode();
// do something with it
}
}
-------------
Ehsan Akhgari
Farda Technology (http://www.farda-tech.com/)
List Owner: [EMAIL PROTECTED]
[ Email: [EMAIL PROTECTED] ]
[ WWW: http://www.beginthread.com/Ehsan ]
He who sees the abyss, but with eagle's eyes - he who with eagle's talons
grasps the abyss: he has courage.
-Thus Spoke Zarathustra, F. W. Nietzsche
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