href="Buffer.html#TYPEt">t</a> -&gt; bytes -&gt; unit</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">add_bytes&nbsp;b&nbsp;s</code> appends the byte sequence <code class="code">s</code> at the end of buffer <code class="code">b</code>.</p>
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<ul class="info-attributes">
<li><b>Since</b> 4.02</li>
</ul>
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<pre><span id="VALadd_substring"><span class="keyword">val</span> add_substring</span> : <code class="type"><a href="Buffer.html#TYPEt">t</a> -&gt; string -&gt; int