no matching function for call to 'of'

63350541

I'm trying to run the official QT chat example from GitHub
but while opening the client in constructor I see an error no matching function for call to 'of'

ChatClient::ChatClient(QObject *parent)
    : QObject(parent)
    , m_clientSocket(new QTcpSocket(this))
    , m_loggedIn(false)
{
  ...
    // Forward the error signal, QOverload is necessary as error() is overloaded, see the Qt docs
    connect(m_clientSocket, QOverload<QAbstractSocket::SocketError>::of(&QAbstractSocket::error), this, &ChatClient::error);
  ...
}

I simply fixed this by replacing

QOverload<QAbstractSocket::SocketError>::of(&QAbstractSocket::error)

with

&QAbstractSocket::error

on build I see

The same error no matching function for call to 'of' is on the server side too

ServerWorker::ServerWorker(QObject *parent)
    : QObject(parent)
    , m_serverSocket(new QTcpSocket(this))
{
....
    connect(m_serverSocket, QOverload<QAbstractSocket::SocketError>::of(&QAbstractSocket::error), this, &ServerWorker::error);
}

and after the same fix I see a warning QAbstractSocket::error is not a signal [clazy-connect-non-signal]

How to make this project work?

J.Hilk

@63350541 said in no matching function for call to 'of':

SocketError

you're probably using Qt 5.15 ?

than use:
connect(m_clientSocket, &QAbstractSocket:: errorOccurred, this, &ChatClient::error);

J.Hilk

@63350541 said in no matching function for call to 'of':

SocketError

you're probably using Qt 5.15 ?

than use:
connect(m_clientSocket, &QAbstractSocket:: errorOccurred, this, &ChatClient::error);

Pl45m4

@63350541 said in no matching function for call to 'of':

run the official QT chat example

This doesn't look like an offcial Qt example.

Official chat examples can be found here

on build I see

The same error no matching function for call to 'of' is on the server side too

The message already tells you what went wrong.
Look at QAbstractSocket::error if you are using a Qt Version < 5.15 or simply follow what @J-Hilk suggested if you have 5.15