Translator Improvements – Getting Tokens

While modifying the translator routines to throw exceptions, it was noticed that some minor  improvements could be made.  The first of these is with calls to the get token function.  There was a similar pattern to most of the calls to this function, where the call was in a try block and for caught errors, the error was set to an appropriate error.

An error status argument was added to the get token function.  The caller puts its desired error status to be returned when the parser returns an Unknown Token.  With this change, the caller no longer needs to catch errors from the get token function call.  Several of the callers need the parser error to be thrown as is, so if the error status argument is a null status, the parser error is thrown as is.  The first status enumerator was assigned to a value of one so that a null status is not one of the existing enumerators.

[branch misc-cpp-stl commit 950d3cf9ed]