A reference to the next regular (non-special) token from the input stream. If this is the
last token from the input stream, or if the token manager has not read tokens beyond this
one, this field is set to null. This is true only if this token is also a regular token.
Otherwise, see below for a description of the contents of this field.
This field is used to access special tokens that occur prior to this token, but after the
immediately preceding regular (non-special) token. If there are no such special tokens, this
field is set to null. When there are more than one such special token, this field refers to
the last of these special tokens, which in turn refers to the next previous special token
through its specialToken field, and so on until the first special token (whose specialToken
field is null). The next fields of special tokens refer to other special tokens that
immediately follow it (without an intervening regular token). If there is no such token,
this field is null.
An optional attribute value of the Token. Tokens which are not used as syntactic sugar will
often contain meaningful values that will be used later on by the compiler or interpreter.
This attribute value is often different from the image. Any subclass of Token that actually
wants to return a non-null value can override this method as appropriate.
Returns a new Token object, by default. However, if you want, you can create and return
subclass objects based on the value of ofKind. Simply add the cases to the switch for all
those special cases. For example, if you have a subclass of Token called IDToken that you
want to create if ofKind is ID, simply add something like :
case MyParserConstants.ID : return new IDToken(ofKind, image);
to the following switch statement. Then you can cast matchedToken variable to the appropriate
type and use sit in your lexical actions.