clang-tidy: modernize-use-equals-default

ntcore/src/main/native/cpp/Message.h

@@ -38,7 +38,7 @@ class Message {
   };
   typedef std::function<NT_Type(unsigned int id)> GetEntryTypeFunc;
 
-  Message() {}
+  Message() = default;
   Message(MsgType type, const private_init&) : m_type(type) {}
 
   MsgType type() const { return m_type; }

ntcore/src/main/native/cpp/SequenceNumber.h

@@ -10,7 +10,7 @@ namespace nt {
 /* A sequence number per RFC 1982 */
 class SequenceNumber {
  public:
-  SequenceNumber() {}
+  SequenceNumber() = default;
   explicit SequenceNumber(unsigned int value) : m_value(value) {}
   unsigned int value() const { return m_value; }
 

ntcore/src/main/native/include/networktables/RpcCall.h

@@ -23,7 +23,7 @@ class RpcCall final {
   /**
    * Construct invalid instance.
    */
-  RpcCall() {}
+  RpcCall() = default;
 
   /**
    * Construct from native handles.

ntcore/src/main/native/include/ntcore_cpp.h

@@ -130,7 +130,7 @@ struct RpcDefinition {
 /** NetworkTables Remote Procedure Call (Server Side) */
 class RpcAnswer {
  public:
-  RpcAnswer() {}
+  RpcAnswer() = default;
   RpcAnswer(NT_Entry entry_, NT_RpcCall call_, StringRef name_,
             StringRef params_, const ConnectionInfo& conn_)
       : entry(entry_), call(call_), name(name_), params(params_), conn(conn_) {}
@@ -176,7 +176,7 @@ class RpcAnswer {
 /** NetworkTables Entry Notification */
 class EntryNotification {
  public:
-  EntryNotification() {}
+  EntryNotification() = default;
   EntryNotification(NT_EntryListener listener_, NT_Entry entry_,
                     StringRef name_, std::shared_ptr<Value> value_,
                     unsigned int flags_)
@@ -217,7 +217,7 @@ class EntryNotification {
 /** NetworkTables Connection Notification */
 class ConnectionNotification {
  public:
-  ConnectionNotification() {}
+  ConnectionNotification() = default;
   ConnectionNotification(NT_ConnectionListener listener_, bool connected_,
                          const ConnectionInfo& conn_)
       : listener(listener_), connected(connected_), conn(conn_) {}
@@ -243,7 +243,7 @@ class ConnectionNotification {
 /** NetworkTables log message. */
 class LogMessage {
  public:
-  LogMessage() {}
+  LogMessage() = default;
   LogMessage(NT_Logger logger_, unsigned int level_, const char* filename_,
              unsigned int line_, StringRef message_)
       : logger(logger_),