error: expected primary-expression before X token
<p>Can you explain what the title error usually means?</p>

<p>I get it sometimes and I always eventually manage to fix it by accident, but I still don't have a clue what it means.</p>

<p>Here's an example from my current error:</p>

<pre><code>Lca&lt;RankVec, VertexVec&gt; lca(graphList[0], dset, ss&amp;);
</code></pre>

<blockquote>
  <p>error: expected primary-expression before ')' token</p>
</blockquote>
