Interface defined to contain ids accessible with
Needed because it is impossible to define these constants in
itself, as static constants (oddity of how Enums
are implemented by JVM).
Id used to represent
, used in
cases where a token may become available when more input
is available: this occurs in non-blocking use cases.
Id used to represent the case where no
is available: either because
has not been
advanced to first token, or because no more tokens will be
available (end-of-input or explicit closing of parser}.
public final static int ID_TRUE = 9;
public final static int ID_NULL = 11;