code: protected LexToken readToken() throws LexException
  	{
  		LexToken tok = reader.getLast();
  		reader.nextToken();
  		return tok;
  	}
docs: Return the last token read, and also advance by one token. This is equivalent to calling {@link #lastToken}
  followed by {@link #nextToken}, but returning the result of lastToken.
  
  @return The last token.
  @throws LexException