@uml The index into {@link #tokens} of token to return by the next call to {@link #nextToken}. The end of the input is indicated by this value being greater than or equal to the number of items in {@link #tokens}.
See Implementation
@uml The index into {@link #tokens} of token to return by the next call to {@link #nextToken}. The end of the input is indicated by this value being greater than or equal to the number of items in {@link #tokens}.