[IMPROVED] Replace empty interface with any

context.go

@@ -217,7 +217,7 @@ func (nc *Conn) FlushWithContext(ctx context.Context) error {
 // RequestWithContext will create an Inbox and perform a Request
 // using the provided cancellation context with the Inbox reply
 // for the data v. A response will be decoded into the vPtr last parameter.
-func (c *EncodedConn) RequestWithContext(ctx context.Context, subject string, v interface{}, vPtr interface{}) error {
+func (c *EncodedConn) RequestWithContext(ctx context.Context, subject string, v any, vPtr any) error {
 	if ctx == nil {
 		return ErrInvalidContext
 	}

enc.go

@@ -26,8 +26,8 @@ import (
 
 // Encoder interface is for all register encoders
 type Encoder interface {
-	Encode(subject string, v interface{}) ([]byte, error)
-	Decode(subject string, data []byte, vPtr interface{}) error
+	Encode(subject string, v any) ([]byte, error)
+	Decode(subject string, data []byte, vPtr any) error
 }
 
 var encMap map[string]Encoder
@@ -88,7 +88,7 @@ func EncoderForType(encType string) Encoder {
 
 // Publish publishes the data argument to the given subject. The data argument
 // will be encoded using the associated encoder.
-func (c *EncodedConn) Publish(subject string, v interface{}) error {
+func (c *EncodedConn) Publish(subject string, v any) error {
 	b, err := c.Enc.Encode(subject, v)
 	if err != nil {
 		return err
@@ -99,7 +99,7 @@ func (c *EncodedConn) Publish(subject string, v interface{}) error {
 // PublishRequest will perform a Publish() expecting a response on the
 // reply subject. Use Request() for automatically waiting for a response
 // inline.
-func (c *EncodedConn) PublishRequest(subject, reply string, v interface{}) error {
+func (c *EncodedConn) PublishRequest(subject, reply string, v any) error {
 	b, err := c.Enc.Encode(subject, v)
 	if err != nil {
 		return err
@@ -110,7 +110,7 @@ func (c *EncodedConn) PublishRequest(subject, reply string, v interface{}) error
 // Request will create an Inbox and perform a Request() call
 // with the Inbox reply for the data v. A response will be
 // decoded into the vPtr Response.
-func (c *EncodedConn) Request(subject string, v interface{}, vPtr interface{}, timeout time.Duration) error {
+func (c *EncodedConn) Request(subject string, v any, vPtr any, timeout time.Duration) error {
 	b, err := c.Enc.Encode(subject, v)
 	if err != nil {
 		return err
@@ -129,7 +129,7 @@ func (c *EncodedConn) Request(subject string, v interface{}, vPtr interface{}, t
 }
 
 // Handler is a specific callback used for Subscribe. It is generalized to
-// an interface{}, but we will discover its format and arguments at runtime
+// an any, but we will discover its format and arguments at runtime
 // and perform the correct callback, including demarshaling encoded data
 // back into the appropriate struct based on the signature of the Handler.
 //
@@ -150,7 +150,7 @@ func (c *EncodedConn) Request(subject string, v interface{}, vPtr interface{}, t
 // and demarshal it into the given struct, e.g. person.
 // There are also variants where the callback wants either the subject, or the
 // subject and the reply subject.
-type Handler interface{}
+type Handler any
 
 // Dissect the cb Handler's signature
 func argInfo(cb Handler) (reflect.Type, int) {

encoders/builtin/default_enc.go

@@ -35,7 +35,7 @@ var falseB = []byte("false")
 var nilB = []byte("")
 
 // Encode
-func (je *DefaultEncoder) Encode(subject string, v interface{}) ([]byte, error) {
+func (je *DefaultEncoder) Encode(subject string, v any) ([]byte, error) {
 	switch arg := v.(type) {
 	case string:
 		bytes := *(*[]byte)(unsafe.Pointer(&arg))
@@ -58,7 +58,7 @@ func (je *DefaultEncoder) Encode(subject string, v interface{}) ([]byte, error)
 }
 
 // Decode
-func (je *DefaultEncoder) Decode(subject string, data []byte, vPtr interface{}) error {
+func (je *DefaultEncoder) Decode(subject string, data []byte, vPtr any) error {
 	// Figure out what it's pointing to...
 	sData := *(*string)(unsafe.Pointer(&data))
 	switch arg := vPtr.(type) {

encoders/builtin/gob_enc.go

@@ -28,7 +28,7 @@ type GobEncoder struct {
 // FIXME(dlc) - This could probably be more efficient.
 
 // Encode
-func (ge *GobEncoder) Encode(subject string, v interface{}) ([]byte, error) {
+func (ge *GobEncoder) Encode(subject string, v any) ([]byte, error) {
 	b := new(bytes.Buffer)
 	enc := gob.NewEncoder(b)
 	if err := enc.Encode(v); err != nil {
@@ -38,7 +38,7 @@ func (ge *GobEncoder) Encode(subject string, v interface{}) ([]byte, error) {
 }
 
 // Decode
-func (ge *GobEncoder) Decode(subject string, data []byte, vPtr interface{}) (err error) {
+func (ge *GobEncoder) Decode(subject string, data []byte, vPtr any) (err error) {
 	dec := gob.NewDecoder(bytes.NewBuffer(data))
 	err = dec.Decode(vPtr)
 	return

encoders/builtin/json_enc.go

@@ -26,7 +26,7 @@ type JsonEncoder struct {
 }
 
 // Encode
-func (je *JsonEncoder) Encode(subject string, v interface{}) ([]byte, error) {
+func (je *JsonEncoder) Encode(subject string, v any) ([]byte, error) {
 	b, err := json.Marshal(v)
 	if err != nil {
 		return nil, err
@@ -35,7 +35,7 @@ func (je *JsonEncoder) Encode(subject string, v interface{}) ([]byte, error) {
 }
 
 // Decode
-func (je *JsonEncoder) Decode(subject string, data []byte, vPtr interface{}) (err error) {
+func (je *JsonEncoder) Decode(subject string, data []byte, vPtr any) (err error) {
 	switch arg := vPtr.(type) {
 	case *string:
 		// If they want a string and it is a JSON string, strip quotes

encoders/protobuf/protobuf_enc.go

@@ -43,7 +43,7 @@ var (
 )
 
 // Encode
-func (pb *ProtobufEncoder) Encode(subject string, v interface{}) ([]byte, error) {
+func (pb *ProtobufEncoder) Encode(subject string, v any) ([]byte, error) {
 	if v == nil {
 		return nil, nil
 	}
@@ -60,8 +60,8 @@ func (pb *ProtobufEncoder) Encode(subject string, v interface{}) ([]byte, error)
 }
 
 // Decode
-func (pb *ProtobufEncoder) Decode(subject string, data []byte, vPtr interface{}) error {
-	if _, ok := vPtr.(*interface{}); ok {
+func (pb *ProtobufEncoder) Decode(subject string, data []byte, vPtr any) error {
+	if _, ok := vPtr.(*any); ok {
 		return nil
 	}
 	i, found := vPtr.(proto.Message)

jetstream/api.go

@@ -103,7 +103,7 @@ const (
 	apiMsgDeleteT = "STREAM.MSG.DELETE.%s"
 )
 
-func (js *jetStream) apiRequestJSON(ctx context.Context, subject string, resp interface{}, data ...[]byte) (*jetStreamMsg, error) {
+func (js *jetStream) apiRequestJSON(ctx context.Context, subject string, resp any, data ...[]byte) (*jetStreamMsg, error) {
 	jsMsg, err := js.apiRequest(ctx, subject, data...)
 	if err != nil {
 		return nil, err

js.go

@@ -1352,7 +1352,7 @@ func processConsInfo(info *ConsumerInfo, userCfg *ConsumerConfig, isPullMode boo
 }
 
 func checkConfig(s, u *ConsumerConfig) error {
-	makeErr := func(fieldName string, usrVal, srvVal interface{}) error {
+	makeErr := func(fieldName string, usrVal, srvVal any) error {
 		return fmt.Errorf("configuration requests %s to be %v, but consumer's value is %v", fieldName, usrVal, srvVal)
 	}
 

micro/request.go

@@ -43,7 +43,7 @@ type (
 
 		// RespondJSON marshals the given response value and responds to the request.
 		// Additional headers can be passed using [WithHeaders] option.
-		RespondJSON(interface{}, ...RespondOpt) error
+		RespondJSON(any, ...RespondOpt) error
 
 		// Error prepares and publishes error response from a handler.
 		// A response error should be set containing an error code and description.
@@ -111,7 +111,7 @@ func (r *request) Respond(response []byte, opts ...RespondOpt) error {
 
 // RespondJSON marshals the given response value and responds to the request.
 // Additional headers can be passed using [WithHeaders] option.
-func (r *request) RespondJSON(response interface{}, opts ...RespondOpt) error {
+func (r *request) RespondJSON(response any, opts ...RespondOpt) error {
 	resp, err := json.Marshal(response)
 	if err != nil {
 		return ErrMarshalResponse

micro/service.go

@@ -85,7 +85,7 @@ type (
 
 	// StatsHandler is a function used to configure a custom STATS endpoint.
 	// It should return a value which can be serialized to JSON.
-	StatsHandler func(*Endpoint) interface{}
+	StatsHandler func(*Endpoint) any
 
 	// ServiceIdentity contains fields helping to identity a service instance.
 	ServiceIdentity struct {

micro/test/service_test.go

@@ -795,7 +795,7 @@ func TestMonitoringHandlers(t *testing.T) {
 		name             string
 		subject          string
 		withError        bool
-		expectedResponse interface{}
+		expectedResponse any
 	}{
 		{
 			name:    "PING all",
@@ -934,15 +934,15 @@ func TestMonitoringHandlers(t *testing.T) {
 				t.Fatalf("Unexpected error: %v", err)
 			}
 
-			respMap := make(map[string]interface{})
+			respMap := make(map[string]any)
 			if err := json.Unmarshal(resp.Data, &respMap); err != nil {
 				t.Fatalf("Unexpected error: %v", err)
 			}
 			expectedResponseJSON, err := json.Marshal(test.expectedResponse)
 			if err != nil {
 				t.Fatalf("Unexpected error: %v", err)
 			}
-			expectedRespMap := make(map[string]interface{})
+			expectedRespMap := make(map[string]any)
 			if err := json.Unmarshal(expectedResponseJSON, &expectedRespMap); err != nil {
 				t.Fatalf("Unexpected error: %v", err)
 			}
@@ -1018,7 +1018,7 @@ func TestServiceStats(t *testing.T) {
 	tests := []struct {
 		name          string
 		config        micro.Config
-		expectedStats map[string]interface{}
+		expectedStats map[string]any
 	}{
 		{
 			name: "stats handler",
@@ -1032,13 +1032,13 @@ func TestServiceStats(t *testing.T) {
 			config: micro.Config{
 				Name:    "test_service",
 				Version: "0.1.0",
-				StatsHandler: func(e *micro.Endpoint) interface{} {
-					return map[string]interface{}{
+				StatsHandler: func(e *micro.Endpoint) any {
+					return map[string]any{
 						"key": "val",
 					}
 				},
 			},
-			expectedStats: map[string]interface{}{
+			expectedStats: map[string]any{
 				"key": "val",
 			},
 		},
@@ -1140,7 +1140,7 @@ func TestServiceStats(t *testing.T) {
 			}
 
 			if test.expectedStats != nil {
-				var data map[string]interface{}
+				var data map[string]any
 				if err := json.Unmarshal(stats.Endpoints[0].Data, &data); err != nil {
 					t.Fatalf("Unexpected error: %v", err)
 				}
@@ -1160,7 +1160,7 @@ func TestRequestRespond(t *testing.T) {
 
 	tests := []struct {
 		name             string
-		respondData      interface{}
+		respondData      any
 		respondHeaders   micro.Headers
 		errDescription   string
 		errCode          string

nats_test.go

@@ -64,7 +64,7 @@ func WaitTime(ch chan bool, timeout time.Duration) error {
 	return errors.New("timeout")
 }
 
-func stackFatalf(t *testing.T, f string, args ...interface{}) {
+func stackFatalf(t *testing.T, f string, args ...any) {
 	lines := make([]string, 0, 32)
 	msg := fmt.Sprintf(f, args...)
 	lines = append(lines, msg)

netchan.go

@@ -23,7 +23,7 @@ import (
 // Data will be encoded and decoded via the EncodedConn and its associated encoders.
 
 // BindSendChan binds a channel for send operations to NATS.
-func (c *EncodedConn) BindSendChan(subject string, channel interface{}) error {
+func (c *EncodedConn) BindSendChan(subject string, channel any) error {
 	chVal := reflect.ValueOf(channel)
 	if chVal.Kind() != reflect.Chan {
 		return ErrChanArg
@@ -61,17 +61,17 @@ func chPublish(c *EncodedConn, chVal reflect.Value, subject string) {
 }
 
 // BindRecvChan binds a channel for receive operations from NATS.
-func (c *EncodedConn) BindRecvChan(subject string, channel interface{}) (*Subscription, error) {
+func (c *EncodedConn) BindRecvChan(subject string, channel any) (*Subscription, error) {
 	return c.bindRecvChan(subject, _EMPTY_, channel)
 }
 
 // BindRecvQueueChan binds a channel for queue-based receive operations from NATS.
-func (c *EncodedConn) BindRecvQueueChan(subject, queue string, channel interface{}) (*Subscription, error) {
+func (c *EncodedConn) BindRecvQueueChan(subject, queue string, channel any) (*Subscription, error) {
 	return c.bindRecvChan(subject, queue, channel)
 }
 
 // Internal function to bind receive operations for a channel.
-func (c *EncodedConn) bindRecvChan(subject, queue string, channel interface{}) (*Subscription, error) {
+func (c *EncodedConn) bindRecvChan(subject, queue string, channel any) (*Subscription, error) {
 	chVal := reflect.ValueOf(channel)
 	if chVal.Kind() != reflect.Chan {
 		return nil, ErrChanArg

test/helper_test.go

@@ -30,8 +30,8 @@ import (
 
 // So that we can pass tests and benchmarks...
 type tLogger interface {
-	Fatalf(format string, args ...interface{})
-	Errorf(format string, args ...interface{})
+	Fatalf(format string, args ...any)
+	Errorf(format string, args ...any)
 }
 
 // TestLogger
@@ -52,7 +52,7 @@ func WaitTime(ch chan bool, timeout time.Duration) error {
 	return errors.New("timeout")
 }
 
-func stackFatalf(t tLogger, f string, args ...interface{}) {
+func stackFatalf(t tLogger, f string, args ...any) {
 	lines := make([]string, 0, 32)
 	msg := fmt.Sprintf(f, args...)
 	lines = append(lines, msg)

test/js_test.go

@@ -6490,7 +6490,7 @@ func testJetStream_ClusterMultipleFetchPullSubscribe(t *testing.T, subject strin
 		gotNoMessages bool
 		count         = 0
 	)
-	queues.Range(func(k, v interface{}) bool {
+	queues.Range(func(k, v any) bool {
 		msgs := v.([]*nats.Msg)
 		count += len(msgs)
 

test/json_test.go

@@ -126,7 +126,7 @@ func TestEncBuiltinJsonMarshalNull(t *testing.T) {
 
 	var testValue *TestType
 
-	ec.Subscribe("json_null", func(i interface{}) {
+	ec.Subscribe("json_null", func(i any) {
 		if i != nil {
 			t.Fatalf("Received test of '%v', wanted 'nil'\n", i)
 		}

test/protobuf_test.go

@@ -76,7 +76,7 @@ func TestEncProtoNilRequest(t *testing.T) {
 	testPerson := &pb.Person{Name: "Anatolii", Age: 25, Address: "Ukraine, Nikolaev"}
 
 	//Subscribe with empty interface shouldn't failed on empty message
-	ec.Subscribe("nil_test", func(_, reply string, _ interface{}) {
+	ec.Subscribe("nil_test", func(_, reply string, _ any) {
 		ec.Publish(reply, testPerson)
 	})