pan></code></pre></div>
<p>The <code>T</code> in this function is a placeholder for any other type. You can use any identifier you like, but <code>T</code> is conventional. At compile time the compiler analyses our code and creates new functions with <code>T</code> replaced with the relevant datatypes, so we don’t have to write versions of <code>add_one()</code> for <code>int</code>, <code>float</code>, <code>double</code> etc.</p>
<p>In Rcpp the process is almost identical, but we have to jump through a 