t>3 + 4 + 5 + 6 + 7</tt>, the parser
will <i>always</i> reduce them from left to right, in this case,
starting with <tt>3 + 4</tt>.  If the associativity of the terminal is
<tt>right</tt>, it is shifted onto the stack.  hence, the reductions
will take place from right to left.  So, if PLUS were declared with
associativity of <tt>right</tt>, the <tt>6 + 7</tt> would be reduced
first in the above string.  If a terminal is declared as
<tt>nonassoc</tt>, then two consecutive occurrences of equal precedence
non-