"Randal L. Schwartz" wrote:
> 
> >>>>> "Doug" == Doug Way <dway at riskmetrics.com> writes:
> 
> Doug> Insert this instead into the place where you were putting your halt:
> 
> Doug>    self doOnlyOnce: [self halt].
> 
> Doug> See ProtoObject>>doOnlyOnce: for more details.  (By the way, it
> Doug> seems like this method doesn't really need to be all the way up
> Doug> in ProtoObject, since it's just a utility method which doesn't
> Doug> refer to self.  Maybe Object would suffice?)
> 
> How would you debug a non-Object object then?  you couldn't say
> "self doOnlyOnce: ...".
> 
> It needs to be at the top of the foodchain to be useful for everything.

Well, you could do something like "1 doOnlyOnce: [1 halt]" to set a one-time halt in a non-Object.

#halt currently isn't in ProtoObject, so you won't be able to do a "self halt" there anyway.  It kind of seems like the #doOnlyOnce:/#rearmOneShot code is related to #halt/etc and maybe belongs with that stuff in Object.  Although I suppose one might have a reason to use doOnlyOnce: without doing a halt.

ProtoObject is pretty lean & mean with only 19 methods, so you don't want to add any more than is absolutely necessary there...

- Doug Way
  dway at riskmetrics.com