default:
		return 4
	}
}

var v1 = f[string]("foo")   // v1 == 0
var v2 = f[byte]([]byte{})  // v2 == 2
</pre>

<p>
The type switch guard may be preceded by a simple statement, which
executes before the guard is evaluated.
</p>

<p>
The "fallthrough" statement is not permitted in a type switch.
</p>

<h3 id="For_statements">For statements</h3>

<p>