Here we go; this works; the controller sends commands to the engine, the engine executes those but depends on the state of the controller for the final result. there is a issue where the classes need to be defined above the actual code. This is no real issue when working with multiple files and public classes but I still think it's against the language specs. This is probably another example of the bug that creates a need for classes that extend Event to be defined above the spot where we use broadcast or signal on them.

Cheers,
Kas.

==========example code below================

//we need to define the classes at the top or the casting will fail
//I considder this to be a bug.

class Foo
    {
    fun void control( int message)
        {
        }

    fun int querry ()
        {
        return false;
        }
    }

class Engine extends Foo
    {
    Foo controller;

    fun void control ( int message)
        {
        <<<message + controller.querry()>>>;
        }
    }

class Controller extends Foo
    {
    Foo engine;
    int state;

    spork ~ work();

    fun int querry()
        {
        return state;
        }

    fun void work()
        {
        while(1)
            {
            second => now;
            !state => state;
            engine.control( maybe );
            }
        }
    }

Controller boss;
Engine motor;
boss $ Foo @=> motor.controller;
motor $ Foo @=> boss.engine;

hour => now;