</pre>

<p>
The function <code>copy</code> copies slice elements from
a source <code>src</code> to a destination <code>dst</code> and returns the
number of elements copied.
Both arguments must have <a href="#Type_identity">identical</a> element type
<code>E</code> and must be assignable to a slice of type <code>[]E</code>.
The number of elements copied is the minimum of
<code>len(src)</code> and <code>len(dst)</code>.