 (char) : defines the resulting evaluation type range:</p>

<p>0   : end marker <br />
'U' : 8-bit integer (0 to 255) <br />
'S' : 8-bit signed integer (-128 to 127) <br />
'C' : 16-bit integer (-32768 to 65535) <br />
'L' : 32-bit signed integer  </p></li>
<li><p><em>sourcefile</em> (lstring) : source file name where expression was defined,
to be used in error messages. May be an empty string, signalling that
the previous <em>sourcefile</em> of the previous expression should be used.</p></li>
<li><p><em>li