Replacement for try-catch-finally

[P . Douglas Reeder]

The ErrTry-ErrCatch-ErrEndCatch macros are very useful, but they lack 
support for a "finally" clause, which is executed whether an error is 
thrown or not.  Is there a better way to way to clean up after an error 
is thrown, than the following pattern?

void Foo(void) {
     UInt32 error2 = 0;
     ...
     ErrTry {
         ...
         if (...)
             ErrThrow(errorCode);
         ...
     } ErrCatch (error) {
                error2 = error;
        } ErrEndCatch;
     // clean up, like you would in a finally clause
     if (error2)
                ErrThrow(error2);
}

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