}

switch {
case x < y: f1()
case x < z: f2()
case x == 4: f3()
}
</pre>

<p>
Implementation restriction: A compiler may disallow multiple case
expressions evaluating to the same constant.
For instance, the current compilers disallow duplicate integer,
floating point, or string constants in case expressions.
</p>

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

<p>

### SIG API Machinery

This release SIG API Machinery focused mainly on CustomResources. For example, subresources for CustomResources are now beta and enabled by default. With this, updates to the `/status` subresource will disallow updates to all fields other than `.status` (not just `.spec` and `.metadata` as before). Also, `required` and `description` can be used at the root of the CRD OpenAPI validation schema when the `/status` subresource is enabled.

* Disallow PriorityClass names with 'system-' prefix for user defined priority classes. ([#59382](https://github.com/kubernetes/kubernetes/pull/59382), [@bsalamat](https://github.com/bsalamat))

  * Fix ceph-secret type to kubernetes.io/rbd in kubernetes-master charm ([#44635](https://github.com/kubernetes/kubernetes/pull/44635), [@Cynerva](https://github.com/Cynerva))

  * Disallows installation of upstream docker from PPA in the Juju kubernetes-worker charm. ([#44681](https://github.com/kubernetes/kubernetes/pull/44681), [@wwwtyro](https://github.com/wwwtyro))

        <match value="\nuser-agent:" type="stringignorecase" offset="0:1000"/>
        <match value="\nallow:" type="stringignorecase" offset="0:1000"/>
        <match value="\ndisallow:" type="stringignorecase" offset="0:1000"/>
        <match value="\nsitemap:" type="stringignorecase" offset="0:1000"/>
      </match>
    </magic>
    <sub-class-of type="text/plain"/>
  </mime-type>