o and from integer types
preserves representation, not sign.
 <p class="noindent"> The rules that hold for <span 
class="pcrr7t-">Enum</span><a 
 id="dx31-261007"></a> instances over a bounded type such as <span 
class="pcrr7t-">Int</span><a 
 id="dx31-261008"></a> (see the section of the Haskell language
report dealing with arithmetic sequences) also hold for the <span 
class="pcrr7t-">Enum</span><a 
 id="dx31-261009"></a> instances over the various <span 
class="pcrr7t-">Word</span><a 
 id="dx31-261010"><