</pre>

<p>
Some operations (<a href="#Slice_expressions">slice expressions</a>,
<a href="#Appending_and_copying_slices"><code>append</code> and <code>copy</code></a>)
rely on a slightly more loose form of core types which accept byte slices and strings.
Specifically, if there are exactly two types, <code>[]byte</code> and <code>string</code>,