Returning from a coroutine without waiting a frame

Unity Engine
1

Is this possible?

I have a base abstract state class that uses coroutines for Enter/Exit methods. It’s not strictly an FSM, but I found using coroutines made it easy to script outro/intro sequences between states.

However, in overriding those coroutines, some derived classes would be better returning from the coroutine in the same frame, like a standard method call.

Is there some way to treat a coroutine as polymorphically interchangeable between a yielding method and a basic method call?

2

Not sure if this is what you want;

 yield break;

Ends the coroutine. (c#)

3

when you yield for end of frame the coroutine returns in the same frame.
check out unity gems they have a tutorial which utilizes coroutines for a state machine. maybe that offers some tips for you.