all: use reflect.TypeFor now available in Go 1.22 (#11078)

Updates #cleanup

Signed-off-by: Joe Tsai <joetsai@digital-static.net>

types/dnstype/dnstype_test.go

@@ -13,7 +13,7 @@ import (
 
 func TestResolverEqual(t *testing.T) {
 	var fieldNames []string
-	for _, field := range reflect.VisibleFields(reflect.TypeOf(Resolver{})) {
+	for _, field := range reflect.VisibleFields(reflect.TypeFor[Resolver]()) {
 		fieldNames = append(fieldNames, field.Name)
 	}
 	sort.Strings(fieldNames)

types/netmap/nodemut.go

@@ -72,7 +72,7 @@ func (m NodeMutationLastSeen) Apply(n *tailcfg.Node) {
 
 var peerChangeFields = sync.OnceValue(func() []reflect.StructField {
 	var fields []reflect.StructField
-	rt := reflect.TypeOf((*tailcfg.PeerChange)(nil)).Elem()
+	rt := reflect.TypeFor[tailcfg.PeerChange]()
 	for i := 0; i < rt.NumField(); i++ {
 		fields = append(fields, rt.Field(i))
 	}

types/netmap/nodemut_test.go

@@ -27,7 +27,7 @@ func TestMapResponseContainsNonPatchFields(t *testing.T) {
 		case reflect.Bool:
 			return reflect.ValueOf(true)
 		case reflect.String:
-			if reflect.TypeOf(opt.Bool("")) == t {
+			if reflect.TypeFor[opt.Bool]() == t {
 				return reflect.ValueOf("true").Convert(t)
 			}
 			return reflect.ValueOf("foo").Convert(t)
@@ -43,7 +43,7 @@ func TestMapResponseContainsNonPatchFields(t *testing.T) {
 		panic(fmt.Sprintf("unhandled %v", t))
 	}
 
-	rt := reflect.TypeOf(tailcfg.MapResponse{})
+	rt := reflect.TypeFor[tailcfg.MapResponse]()
 	for i := 0; i < rt.NumField(); i++ {
 		f := rt.Field(i)
 

types/persist/persist_test.go

@@ -22,7 +22,7 @@ func fieldsOf(t reflect.Type) (fields []string) {
 
 func TestPersistEqual(t *testing.T) {
 	persistHandles := []string{"LegacyFrontendPrivateMachineKey", "PrivateNodeKey", "OldPrivateNodeKey", "Provider", "UserProfile", "NetworkLockKey", "NodeID", "DisallowedTKAStateIDs"}
-	if have := fieldsOf(reflect.TypeOf(Persist{})); !reflect.DeepEqual(have, persistHandles) {
+	if have := fieldsOf(reflect.TypeFor[Persist]()); !reflect.DeepEqual(have, persistHandles) {
 		t.Errorf("Persist.Equal check might be out of sync\nfields: %q\nhandled: %q\n",
 			have, persistHandles)
 	}