[Rd] Error condition in evaluating a promise

[Simon Urbanek]

Martin,

On Oct 17, 2006, at 11:43 PM, Martin Morgan wrote:

> I believe the technique is to create an environment in the  
> namespace, and then to access that through functions:
>

thanks, but this is not what I want (the symbols in the environment  
are invisible outside) and it has nothing to do with the question I  
posed: as I was saying in the previous e-mail the point is to have  
exported variables in a namespace, but their value is known only  
after the namespace was attached (to be precise I'm talking about  
rJava here and many variables are valid only after the VM was  
initialized - using them before is an error). I have an ugly work- 
around for that as well, the question was whether promises could be  
used for that purpose as a more clean solution and the answer appears  
to be no - at least for R <=2.4.0.

Thanks,
Simon