Rod Adams writes:
> C<study> is an odd sort of function. AFAIK, it's the only optimization 
> hint that we have.
> Will the P6RE even use this information, and is it worth keeping?
> My gut feeling tells me that it will be useful again around 6.2, and we 
> should keep it around until then as a potential no-op.

Ummm... yeah, keep a function around if it's not currently implemented.
I don't think so.  

When we do implement it, we can put it in as a method on Str.



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