Re: reset a scanner

[John Millaway]

> I want to know how to reset it properly 
> after it catches a error(wrong content, wrong token, etc.).

Several choices come to mind:

+ halt everything by returning 0 or calling yyterminate()
* pass the error up to the parser by returning an unexpected token.
* record the error, but otherwise continue scanning the next token.
* jump to an error state (a start condition) in which you look for
  a certain pattern to re-sync the scan, such as "\n" or ";" or "}".
* REJECT the current rule and try to match a different rule

-John

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