communication to establish a relative ordering.
</p>

<h3 id="chan">Channel communication</h3>

<p>
Channel communication is the main method of synchronization
between goroutines.  Each send on a particular channel
is matched to a corresponding receive from that channel,
usually in a different goroutine.
</p>

<p class="rule">
A send on a channel is synchronized before the completion of the
corresponding receive from that channel.

  A wildcard ending in "...", like <code>/files/{path...}</code>, must occur at the end of a pattern and matches all the remaining segments.
</p>

<p>
  A pattern that ends in "/" matches all paths that have it as a prefix, as always.
  To match the exact pattern including the trailing slash, end it with <code>{$}</code>,
  as in <code>/exact/match/{$}</code>.
</p>

</p>

<h4 id="Type_switches">Type switches</h4>

<p>
A type switch compares types rather than values. It is otherwise similar
to an expression switch. It is marked by a special switch expression that
has the form of a <a href="#Type_assertions">type assertion</a>
using the keyword <code>type</code> rather than an actual type:
</p>

<pre>
switch x.(type) {
// cases
}
</pre>

<p>