_prop">New position values and propagation</a>,
</li><li> <a href="#ret_val">Parser now returns a value</a>,
</li><li> <a href="#prec_add">Terminal precedence declarations</a> and
</li><li> <a href="#con_prec">Rule contextual precedence assignment</a>
</li></ul>

<h5><a name="lex_inter"></a>Lexical Interface</h5>

CUP now interfaces with the lexer in a completely different
manner.  In the previous releases, a new class was used for every
distinct type of terminal.  This release, however, uses only one class