I want to use coroutines in actionscript to implement a state machine.
I d like to be able to do something like the following
function stateMachine():void
{
sendBytes(0xFFFF);
var receiveBytes:ByteArray = yield()
sendBytes(receiveBytes);
}
stateMachine.send( Socket.read() )
like in this blog entry
As far as I know, Actionscript doesn t have coroutines, continuations or anything that will give you the relevant behavior (call a function without pushing a stack frame). You can fake it using static variables and a switch, but that defeats the purpose of using coroutines for state machines. Also, without tail calls (still only a proposal for ECMASCRIPT, as far as I know), faked coroutines won t use constant stack space as real coroutines do.
Regarding your sample code, coroutines generally need to loop to be useful.
Well, how about this?
function stateMachine(socket:Socket, target:YourReceiverClass):void
{
target.sendBytes(0xFFFF);
var receiveByte:int = socket.readByte();
target.sendBytes(receiveByte);
}
stateMachine( mySocket )
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