Refactor overflow callback to use using instead of typedef

Author: h2zero

src/NimBLEStream.h

@@ -67,7 +67,7 @@ class NimBLEStream : public Stream {
         DROP_NEW_DATA    // Drop new incoming data when buffer is full
     };
 
-    typedef std::function<RxOverflowAction(const uint8_t* data, size_t len, void* userArg)> rx_overflow_callback_t;
+    using RxOverflowCallback = std::function<RxOverflowAction(const uint8_t* data, size_t len, void* userArg)>;
 
     NimBLEStream() = default;
     virtual ~NimBLEStream() { end(); }
@@ -98,7 +98,7 @@ class NimBLEStream : public Stream {
      * @param cb The callback function, which should return DROP_OLDER_DATA to drop older buffered data and
      * make room for the new data, or DROP_NEW_DATA to drop the new data instead.
      */
-    void setRxOverflowCallback(rx_overflow_callback_t cb, void* userArg = nullptr) {
+    void setRxOverflowCallback(RxOverflowCallback cb, void* userArg = nullptr) {
         m_rxOverflowCallback = cb;
         m_rxOverflowUserArg = userArg;
     }
@@ -125,7 +125,7 @@ class NimBLEStream : public Stream {
     uint32_t               m_rxBufSize{1024};
     ble_npl_event          m_txDrainEvent{};
     ble_npl_callout        m_txDrainCallout{};
-    rx_overflow_callback_t m_rxOverflowCallback{nullptr};
+    RxOverflowCallback m_rxOverflowCallback{nullptr};
     void*                  m_rxOverflowUserArg{nullptr};
     bool                   m_coInitialized{false};
     bool                   m_eventInitialized{false};