when destructing a Tagger class, we now also unset the error-callback (closes #480), at the same time we changed the version number in the Makefile (closes #481)

Makefile

@@ -3,7 +3,7 @@ INCLUDE_DIR             = ${PREFIX}/include
 LIBRARY_DIR             = ${PREFIX}/lib
 export LIBRARY_NAME		= amqpcpp
 export SONAME			= 4.3
-export VERSION			= 4.3.15
+export VERSION			= 4.3.17
 
 all:
 		$(MAKE) -C src all

include/amqpcpp/reliable.h

@@ -1,11 +1,15 @@
 /**
  *  Reliable.h
  *  
- *  A channel wrapper based on AMQP::Throttle that allows message callbacks to be installed
- *  on the publishes, to be called when they are confirmed by the message broker.
+ *  A channel wrapper based on AMQP::Tagger that allows message callbacks to be installed
+ *  on the publish-confirms, to be called when they a confirmation is received from RabbitMQ.
+ * 
+ *  You can also change the base class and use Reliable<Throttle> if you not only
+ *  want to be notified about the publish-confirms, but want to use it for automatic
+ *  throttling at the same time.
  *  
  *  @author Michael van der Werve <michael.vanderwerve@mailerq.com>
- *  @copyright 2020 Copernica BV
+ *  @copyright 2020 - 2022 Copernica BV
  */
 
 /**

include/amqpcpp/tagger.h

@@ -1,7 +1,14 @@
 /**
  *  Tagger.h
  *  
- *  Base class that enables publisher confirms and keeps track of the sent messages.
+ *  Base class that enables publisher confirms and keeps track of the sent 
+ *  messages. You can wrap this class around a AMQP::Channel object and use
+ *  this object for publishing instead. This is a base class that you cannot
+ *  use directly. You should instead use:
+ * 
+ *  - Throttle: to throttle traffic to prevent flooding RabbitMQ
+ *  - Reliable<Tagger>: to be notified about publish-confirms via callbacks
+ *  - Reliable<Throttle>: to have throttle + notifications via callbacks
  *  
  *  @author Michael van der Werve <michael.vanderwerve@mailerq.com>
  *  @copyright 2020 Copernica BV
@@ -101,7 +108,7 @@ public:
     /**
      *  Virtual destructor
      */
-    virtual ~Tagger() = default;
+    virtual ~Tagger();
 
     /**
      *  Method to check how many messages are still unacked.

src/tagger.cpp

@@ -38,6 +38,15 @@ Tagger::Tagger(Channel &channel) : _implementation(channel._implementation)
     _implementation->onError([this](const char *message) { reportError(message); });  
 }
 
+/**
+ *  Destructor
+ */
+Tagger::~Tagger()
+{
+    // restore the error-callback
+    _implementation->onError(nullptr);
+}
+
 /**
  *  Send method for a frame
  *  @param  id