>size</code>. If the string is too big, the integer is still parsed and then wrapped modulo <code>2^size</code></p></dd></dl><dl><dt class="spec value" id="val-of_substring"><a href="#val-of_substring" class="anchor"></a><code><span class="keyword">val</span> of_substring : <span>?&#8288;base:int</span> <span>&#45;&gt;</span> <span>size:int</span> <span>&#45;&gt;</span> <span>pos:int</span> <span>&#45;&gt;</span> <span>len:int</span> <span>&#45;&gt;</span> string <span>&#45;&gt;</span> <a href="index.html#t