In file included from poco/Net/src/SocketProactor.cpp:15:0:
poco/Net/include/Poco/Net/SocketProactor.h:62:50: error: 'error_code' in namespace 'std' does not name a type
  using Callback = std::function<void (const std::error_code& failure, int bytesReceived)>;
                                                  ^
poco/Net/include/Poco/Net/SocketProactor.h:62:90: error: expected '::' before ';' token
  using Callback = std::function<void (const std::error_code& failure, int bytesReceived)>;
                                                                                          ^
poco/Net/include/Poco/Net/SocketProactor.h:62:90: error: expected identifier before ';' token
poco/Net/include/Poco/Net/SocketProactor.h:168:69: error: 'Callback' has not been declared
  void addReceiveFrom(Socket sock, Buffer& buf, SocketAddress& addr, Callback&& onCompletion);
                                                                     ^
poco/Net/include/Poco/Net/SocketProactor.h:171:80: error: 'Callback' has not been declared
  void addSendTo(Socket sock, const Buffer& message, const SocketAddress& addr, Callback&& onCompletion);
                                                                                ^
poco/Net/include/Poco/Net/SocketProactor.h:174:76: error: 'Callback' has not been declared
  void addSendTo(Socket sock, Buffer&& message, const SocketAddress&& addr, Callback&& onCompletion);
                                                                            ^
poco/Net/include/Poco/Net/SocketProactor.h:177:68: error: 'Callback' has not been declared
  void addSend(Socket sock, Buffer* pMessage, SocketAddress* pAddr, Callback&& onCompletion, bool own = false);
                                                                    ^
poco/Net/include/Poco/Net/SocketProactor.h:182:44: error: 'Callback' has not been declared
  void addReceive(Socket sock, Buffer& buf, Callback&& onCompletion);
                                            ^
poco/Net/include/Poco/Net/SocketProactor.h:185:51: error: 'Callback' has not been declared
  void addSend(Socket sock, const Buffer& message, Callback&& onCompletion);
                                                   ^
poco/Net/include/Poco/Net/SocketProactor.h:188:46: error: 'Callback' has not been declared
  void addSend(Socket sock, Buffer&& message, Callback&& onCompletion);
                                              ^
poco/Net/include/Poco/Net/SocketProactor.h:227:3: error: 'Callback' does not name a type
   Callback _onCompletion = nullptr;
   ^
poco/Net/include/Poco/Net/SocketProactor.h:239:26: error: expected ')' before '&&' token
   IONotification(Callback&& onCompletion, int bytes, const std::error_code& errorCode):
                          ^
poco/Net/include/Poco/Net/SocketProactor.h:256:3: error: 'Callback' does not name a type
   Callback _onCompletion;
   ^
poco/Net/include/Poco/Net/SocketProactor.h:258:8: error: 'error_code' in namespace 'std' does not name a type
   std::error_code _errorCode;
        ^
poco/Net/include/Poco/Net/SocketProactor.h:436:29: error: 'Callback' has not been declared
  void enqueueIONotification(Callback&& onCompletion, int n, int err);
                             ^
poco/Net/include/Poco/Net/SocketProactor.h: In member function 'void Poco::Net::SocketProactor::IONotification::call()':
poco/Net/include/Poco/Net/SocketProactor.h:252:18: error: '_errorCode' was not declared in this scope
    _onCompletion(_errorCode, _bytes);
                  ^
poco/Net/include/Poco/Net/SocketProactor.h:252:36: error: '_onCompletion' was not declared in this scope
    _onCompletion(_errorCode, _bytes);
                                    ^
poco/Net/include/Poco/Net/SocketProactor.h: In member function 'int Poco::Net::SocketProactor::errorImpl(Poco::Net::Socket&, T&, Poco::Mutex&)':
poco/Net/include/Poco/Net/SocketProactor.h:397:43: error: 'struct Poco::Net::SocketProactor::Handler' has no member named '_onCompletion'
    enqueueIONotification(std::move((*it)->_onCompletion), 0, err);
                                           ^
poco/Net/include/Poco/Net/SocketProactor.h: At global scope:
poco/Net/include/Poco/Net/SocketProactor.h:482:51: error: variable or field 'enqueueIONotification' declared void
 inline void SocketProactor::enqueueIONotification(Callback&& onCompletion, int n, int err)
                                                   ^
poco/Net/include/Poco/Net/SocketProactor.h:482:51: error: 'Callback' was not declared in this scope
poco/Net/include/Poco/Net/SocketProactor.h:482:62: error: 'onCompletion' was not declared in this scope
 inline void SocketProactor::enqueueIONotification(Callback&& onCompletion, int n, int err)
                                                              ^
poco/Net/include/Poco/Net/SocketProactor.h:482:76: error: expected primary-expression before 'int'
 inline void SocketProactor::enqueueIONotification(Callback&& onCompletion, int n, int err)
                                                                            ^
poco/Net/include/Poco/Net/SocketProactor.h:482:83: error: expected primary-expression before 'int'
 inline void SocketProactor::enqueueIONotification(Callback&& onCompletion, int n, int err)
                                                                                   ^
poco/Net/src/SocketProactor.cpp:808:3: error: expected '}' at end of input
 } } // namespace Poco::Net
   ^
poco/Net/src/SocketProactor.cpp:808:3: error: expected '}' at end of input