Socket wrapper clone function is const now

inc/tcplistener.hpp

@@ -139,7 +139,7 @@ public:
      * 
      * @return A clone of this TcpListener that shares the same underlying socket.
      */
-    TcpListener clone();
+    TcpListener clone() const;
 
 };
 

inc/tcpstream.hpp

@@ -250,7 +250,7 @@ public:
      * 
      * @return A clone of this TcpStream that shares the same underlying socket.
      */
-    TcpStream clone();
+    TcpStream clone() const;
 
     friend class TcpListener;
 

inc/udpsocket.hpp

@@ -236,7 +236,7 @@ public:
      * 
      * @return A clone of this UdpSocket that shares the same underlying socket.
      */
-    UdpSocket clone();
+    UdpSocket clone() const;
 
 };
 

src/tcplistener.cpp

@@ -136,7 +136,7 @@ void TcpListener::setAutoclose(bool _autoclose)
     autoclose = _autoclose;
 }
 
-TcpListener TcpListener::clone()
+TcpListener TcpListener::clone() const
 {
     TcpListener other{local};
     other.sockfd = sockfd;

src/tcpstream.cpp

@@ -266,7 +266,7 @@ void TcpStream::setAutoclose(bool _autoclose)
     autoclose = _autoclose;
 }
 
-TcpStream TcpStream::clone()
+TcpStream TcpStream::clone() const
 {
     TcpStream other{remote};
     other.sockfd = sockfd;

src/udpsocket.cpp

@@ -197,7 +197,7 @@ void UdpSocket::setAutoclose(bool _autoclose)
     autoclose = _autoclose;
 }
 
-UdpSocket UdpSocket::clone()
+UdpSocket UdpSocket::clone() const
 {
     UdpSocket other;
     other.local = local;