str   String = "hello"
	)

	asArray(a)
	isArray(a)
	asArray(*&a)
	isArray(*&a)
	asArray(Array{})
	isArray(Array{})

	asBool(b)
	isBool(b)
	asBool(!b)
	isBool(!b)
	asBool(true)
	asBool(*&b)
	isBool(*&b)
	asBool(Bool(true))
	isBool(Bool(true))

	asChan(c)
	isChan(c)
	asChan(make(Chan))
	isChan(make(Chan))
	asChan(*&c)
	isChan(*&c)
	asChan(Chan(nil))
	isChan(Chan(nil))

type Slice []byte

var slice Slice

func asBool(Bool)     {}
func asString(String) {}

type String string

func main() {
	var (
		b    Bool = true
		i, j int
		c    = make(chan int)
		m    = make(Map)
	)

	asBool(b)
	asBool(!b)
	asBool(true)
	asBool(*&b)
	asBool(Bool(true))
	asBool(1 != 2) // ok now
	asBool(i < j)  // ok now

	_, b = m[2] // ok now

					s = v
				} else if v, ok := kv.AsInt64(); ok {
					ii = v
				} else if v, ok := kv.AsUint64(); ok {
					u = v
				} else if v, ok := kv.AsFloat64(); ok {
					f = v
				} else if v, ok := kv.AsBool(); ok {
					bb = v
				} else if v, ok := kv.AsDuration(); ok {
					d = v
				} else if v, ok := kv.AsAny(); ok {
					a = v
				} else {
					panic("bad kind")
				}
			}
		}
		_ = ii
		_ = s

	if sint != newsint {
		t.Errorf("second registration of []int creates new type")
	}
	var b []bool
	sbool := getTypeUnlocked("", reflect.TypeOf(b))
	if sbool == sint {
		t.Errorf("registration of []bool creates same type as []int")
	}
	str := sbool.string()
	expected := "[]bool"
	if str != expected {
		t.Errorf("slice printed as %q; expected %q", str, expected)
	}
}