public ivKittenObject Kitten_SendMessage(ivKittenObject obj, ivKittenMessage msg)
{
ivKittenClass cls = obj.isa;
ivKittenMethod selectedMethod = null;
//search methods up the inheritance tree
while (true)
{
foreach (ivKittenMethod method in cls.methodList)
{
if (method.methodName == msg.msg)
{
selectedMethod = method;
}
goto end;
}
if (cls.superclass != cls)
{
cls = cls.superclass;
}
else
{
goto end;
}
}
end:
//can respond to message
if (selectedMethod == null)
{
Kitten_ReportError($"Object Unable to Respond to message: {msg.ToString()}");
return(null);
}
//args count matches
if (msg.args.Count != selectedMethod.argCount)
{
Kitten_ReportError("Argument count mismatch");
return(null);
}
//case 1: built-in functions
if (selectedMethod is ivKittenBuiltinMethod)
{
selectedMethod.self = obj;
return((selectedMethod as ivKittenBuiltinMethod).impl(msg.args));
}
//case 2: image functions
else
{
#warning implementation incomplete for image functions
return(null);
}
return(null);
}
public List <ivKittenClass> init()
{
List <ivKittenClass> standardImage = new List <ivKittenClass>();
//kObject_metaclass (no implementation yet)
kObject_meta_cls = new ivKittenClass()
{
classname = "meta_kObject"
};
//kObject
ivKittenClass kObject_cls = new ivKittenClass();
kObject_cls.classname = "kObject";
kObject_cls.isa = kObject_meta_cls;
kObject_cls.superclass = kObject_cls; //superclass of Object is itself
//KObject_metaclass finish-up
kObject_meta_cls.superclass = kObject_cls;
kObject_meta_cls.isa = kObject_meta_cls;
//kString_metaclass (no implementation yet)
ivKittenClass kString_meta_cls = new ivKittenClass()
{
classname = "meta_kString", isa = kObject_meta_cls, superclass = kObject_meta_cls
};
//kString
ivKittenClass kString_cls = new ivKittenClass()
{
classname = "kString", isa = kObject_meta_cls, superclass = kObject_cls
};
/*kObject member methods*/
//kObject_toString
var kObject_toString_method = new ivKittenBuiltinMethod()
{
methodName = "toString", argCount = 0
};
kObject_toString_method.impl = n =>
{
return(new ivKittenString("this is returned by sending toString to Object"));
};
return(standardImage);
}