or">Sys</span>.argv</code></a>) of the argument being processed.  You can
    change this value, e.g. to force <a href="Arg.html#VALparse"><code class="code"><span class="constructor">Arg</span>.parse</code></a> to skip some arguments.
    <a href="Arg.html#VALparse"><code class="code"><span class="constructor">Arg</span>.parse</code></a> uses the initial value of <a href="Arg.html#VALcurrent"><code class="code"><span class="constructor">Arg</span>.current</code></a> as the index of
    argument 0 (the prog