State cannot disconnect a network client.

[JodiTheTigger]

the interface to disconnect a client is exposed by the NetworkManagerClient.

The Game state itself cannot explicitly disconnect a player (although the state is told when a player disconnects via IStateManager).

It can sorta do it by returning false to IsConnected. But it cannot return a fail reason.

Currently the network depends on IStateManager, but not the other way around (nor do I want that linkage).

Figure out how to solve this, then solve it.

[JodiTheTigger]

Just return a boost::optional fail message. If it's valid, it's disconnected (and has a fail string) otherwise it's still connected.

[JodiTheTigger]

Right, State isn't allowed to disconnect the network client. So remove "IsDisconnected" completely.