switch concrete := t; concrete.Kind() {
	case reflect.Bool:
		v.SetBool(rand.Int()&1 == 0)
	case reflect.Float32:
		v.SetFloat(float64(randFloat32(rand)))
	case reflect.Float64:
		v.SetFloat(randFloat64(rand))
	case reflect.Complex64:
		v.SetComplex(complex(float64(randFloat32(rand)), float64(randFloat32(rand))))
	case reflect.Complex128:
		v.SetComplex(complex(randFloat64(rand), randFloat64(rand)))
	case reflect.Int16: