bytes from the
    current contents of the buffer <code class="code">b</code>, starting at offset <code class="code">off</code>.</p>

<p>Raise <code class="code"><span class="constructor">Invalid_argument</span></code> if <code class="code">srcoff</code> and <code class="code">len</code> do not designate a valid
    range of <code class="code">b</code>.</p>
</div>
</div>

<pre><span id="VALblit"><span class="keyword">val</span> blit</span> : <code class="type"><a href="Buffer.html#TYPEt">t</a> -&gt; int -&g