<pre>
type (
	nodeList = []*Node  // nodeList and []*Node are identical types
	Polar    = polar    // Polar and polar denote identical types
)
</pre>


<h4 id="Type_definitions">Type definitions</h4>

<p>
A type definition creates a new, distinct type with the same
<a href="#Types">underlying type</a> and operations as the given type,
and binds an identifier to it.
</p>

<pre class="ebnf">