case token.FALLTHROUGH:
			if ctxt&fallthroughOk == 0 {
				var msg string
				switch {
				case ctxt&finalSwitchCase != 0:
					msg = "cannot fallthrough final case in switch"
				case ctxt&inTypeSwitch != 0:
					msg = "cannot fallthrough in type switch"
				default:
					msg = "fallthrough statement out of place"
				}
				check.error(s, MisplacedFallthrough, msg)
			}
		default:

// Issue 873, 2162

package foo

func f(x interface{}) {
	switch t := x.(type) {  // ERROR "declared and not used"
	case int:
	}
}

func g(x interface{}) {
	switch t := x.(type) {
	case int:
	case float32:
		println(t)
	}
}

func h(x interface{}) {
	switch t := x.(type) {
	case int:
	case float32:
	default:
		println(t)
	}

// caused an internal compiler error.

package p

func F() {
	switch t := nil.(type) { // ERROR "cannot type switch on non-interface value|not an interface"
	default:
		_ = t
	}
}

const x = 1

func G() {
	switch t := x.(type) { // ERROR "cannot type switch on non-interface value|declared and not used|not an interface"
	default:
	}

func testableNetwork(network string) bool {
	net, _, _ := strings.Cut(network, ":")
	switch net {
	case "ip+nopriv":
	case "ip", "ip4", "ip6":
		switch runtime.GOOS {
		case "plan9":
			return false
		default:
			if os.Getuid() != 0 {
				return false
			}
		}
	case "unix", "unixgram":
		switch runtime.GOOS {
		case "android", "ios", "plan9", "windows":
			return false
		case "aix":

package p

func _[T any](x interface{}){
	switch x.(type) {
	case T: // ok to use a type parameter
	case int:
	}

	switch x.(type) {
	case T:
	case T /* ERROR "duplicate case" */ :
	}
}

type constraint interface {
	~int
}

func _[T constraint](x interface{}){
	switch x.(type) {
	case T: // ok to use a type parameter even if type set contains int
	case int:

// Also tested by csin(casin(z)) = z.

// Sin returns the sine of x.
func Sin(x complex128) complex128 {
	switch re, im := real(x), imag(x); {
	case im == 0 && (math.IsInf(re, 0) || math.IsNaN(re)):
		return complex(math.NaN(), im)
	case math.IsInf(im, 0):
		switch {
		case re == 0:
			return x
		case math.IsInf(re, 0) || math.IsNaN(re):
			return complex(math.NaN(), im)
		}

// license that can be found in the LICENSE file.

package p

func _(x int, c string) {
	switch x {
	case c /* ERROR "invalid case c in switch on x (mismatched types string and int)" */ :
	}
}

func _(x, c []int) {
	switch x {
	case c /* ERROR "invalid case c in switch on x (slice can only be compared to nil)" */ :
	}

	if nestedErr == nil {
		return nil
	}

	switch err := nestedErr.(type) {
	case *OpError:
		if err := err.isValid(); err != nil {
			return err
		}
		nestedErr = err.Err
		goto second
	}
	return fmt.Errorf("unexpected type on 1st nested level: %T", nestedErr)

second:
	if isPlatformError(nestedErr) {
		return nil
	}
	switch err := nestedErr.(type) {

			found := false
			for i := len(inst.Prefix) - 1; i >= 0; i-- {
				switch inst.Prefix[i] & 0xFF {
				case 0xF3:
					if !found {
						found = true
						inst.Prefix[i] |= PrefixImplicit
					}
				case 0xF2:
					inst.Prefix[i] &^= PrefixImplicit
				}
			}
			inst.Op = MOVNTSS
		}
	}

	// Add implicit arguments.
	switch inst.Op {
	case MONITOR:
		inst.Args[0] = EDX
		inst.Args[1] = ECX

            }
        """
        writeBuildLogicPlugin()
        writeGreetTask "GreetTask", ORIGINAL_GREETING
        switch (kind) {
            case Kind.CHANGE_RESOURCE:
                writeResource ""
                break
        }
    }

    void applyChange() {
        switch (kind) {
            case Kind.CHANGE_SOURCE:
                writeGreetTask "GreetTask", CHANGED_GREETING
                break