[Grace-core] Undefined Variables

[Kim Bruce]

Sounds good to me!

Kim



> On Mar 2, 2015, at 5:00 PM, Andrew P. Black <andrew.p.black at gmail.com> wrote:
> 
> 
> On 25 Feb 2015, at 14:15, Kim Bruce <kim at cs.pomona.edu> wrote:
> 
>> It sounds like one of those things that will be available, but not made prominent, that is mainly there for tools to use.  (Perhaps we could even issue a warning in any program that uses it.)  At any rate, while I would discourage students from using it, it seems useful for building tools.  It's OK to me tao have it raise an exception.
> 
> We could put the definition of the exception (and of the method that tests for undefinedness) in a named module so that they have to be imported explicitly.  This is like mirrors.  
> 
> 	Andrew
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