added comments

include/amqpcpp/bytebuffer.h

@@ -5,7 +5,7 @@
  *  around a buffer of bytes
  *
  *  @author Emiel Bruijntjes <emiel.bruijntjes@copernica.com>
- *  @copyright 2014 Copernica BV
+ *  @copyright 2014 - 2018 Copernica BV
  */
 
 /**
@@ -114,7 +114,10 @@ public:
      */
     virtual const char *data(size_t pos, size_t size) const override
     {
+        // make sure compilers dont complain about unused parameters
         (void) size;
+        
+        // expose the data
         return _data + pos;
     }
     

include/amqpcpp/connectionhandler.h

@@ -6,7 +6,7 @@
  *  of methods that are called when data needs to be sent, or when the
  *  AMQP connection ends up in a broken state.
  *
- *  @copyright 2014 Copernica BV
+ *  @copyright 2014 - 2018 Copernica BV
  */
 
 /**
@@ -62,9 +62,11 @@ public:
      */
     virtual uint16_t onNegotiate(Connection *connection, uint16_t interval)
     {
-        // default implementation, disable heartbeats
+        // make sure compilers dont complain about unused parameters
         (void) connection;
         (void) interval;
+
+        // default implementation, disable heartbeats
         return 0;
     }
 
@@ -90,7 +92,11 @@ public:
      *
      *  @param  connection      The connection over which the heartbeat was received
      */
-    virtual void onHeartbeat(Connection *connection) { (void) connection; }
+    virtual void onHeartbeat(Connection *connection) 
+    { 
+        // make sure compilers dont complain about unused parameters
+        (void) connection;
+    }
 
     /**
      *  When the connection ends up in an error state this method is called.
@@ -108,6 +114,7 @@ public:
      */
     virtual void onError(Connection *connection, const char *message)
     {
+        // make sure compilers dont complain about unused parameters
         (void) connection;
         (void) message;
     }
@@ -126,7 +133,11 @@ public:
      *
      *  @param  connection      The connection that can now be used
      */
-    virtual void onConnected(Connection *connection) { (void) connection; }
+    virtual void onConnected(Connection *connection) 
+    { 
+        // make sure compilers dont complain about unused parameters
+        (void) connection; 
+    }
 
     /**
      *  Method that is called when the connection was closed.
@@ -136,8 +147,11 @@ public:
      *
      *  @param  connection      The connection that was closed and that is now unusable
      */
-    virtual void onClosed(Connection *connection) { (void) connection; }
-
+    virtual void onClosed(Connection *connection) 
+    { 
+        // make sure compilers dont complain about unused parameters
+        (void) connection; 
+    }
 };
 
 /**

include/amqpcpp/deferred.h

@@ -5,7 +5,7 @@
  *  possibly happen in the future that can be
  *  caught.
  *
- *  @copyright 2014 Copernica BV
+ *  @copyright 2014 - 2018 Copernica BV
  */
 
 /**
@@ -97,10 +97,12 @@ protected:
      */
     virtual const std::shared_ptr<Deferred> &reportSuccess(const std::string &name, uint32_t messagecount, uint32_t consumercount) const
     {
-        // this is the same as a regular success message
+        // make sure compilers dont complain about unused parameters
         (void) name;
         (void) messagecount;
         (void) consumercount;
+
+        // this is the same as a regular success message
         return reportSuccess();
     }
 
@@ -111,8 +113,10 @@ protected:
      */
     virtual const std::shared_ptr<Deferred> &reportSuccess(uint32_t messagecount) const
     {
-        // this is the same as a regular success message
+        // make sure compilers dont complain about unused parameters
         (void) messagecount;
+
+        // this is the same as a regular success message
         return reportSuccess();
     }
 
@@ -125,10 +129,12 @@ protected:
      */
     virtual const std::shared_ptr<Deferred> &reportSuccess(uint32_t messagecount, uint64_t deliveryTag, bool redelivered)
     {
-        // this is the same as a regular success message
+        // make sure compilers dont complain about unused parameters
         (void) messagecount;
         (void) deliveryTag;
         (void) redelivered;
+
+        // this is the same as a regular success message
         return reportSuccess();
     }
 
@@ -139,8 +145,10 @@ protected:
      */
     virtual const std::shared_ptr<Deferred> &reportSuccess(const std::string &name)
     {
-        // this is the same as a regular success message
+        // make sure compilers dont complain about unused parameters
         (void) name;
+
+        // this is the same as a regular success message
         return reportSuccess();
     }
 

include/amqpcpp/frame.h

@@ -4,7 +4,7 @@
  *  Base class for frames. This base class can not be constructed from outside
  *  the library, and is only used internally.
  *
- *  @copyright 2014 Copernica BV
+ *  @copyright 2014 - 2018 Copernica BV
  */
 
 /**
@@ -90,6 +90,7 @@ public:
      */
     virtual bool process(ConnectionImpl *connection)
     {
+        // make sure compilers dont complain about unused parameters
         (void) connection;
 
         // this is an exception