Re: BETWEEN SYMMETRIC/ASYMMETRIC

TODO updated:

> * Add BETWEEN ASYMMETRIC/SYMMETRIC (Christopher)
> * Christopher is Christopher Kings-Lynne <chriskl@familyhealth.com.au>

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Christopher Kings-Lynne wrote:
> > "Christopher Kings-Lynne" <chriskl@familyhealth.com.au> writes:
> > > Also, Tom (or anyone): in regards to your previous email,
> > should I just go
> > > back to using opt_symmetry to shorten the number of productions, since I
> > > have to make them reserved words anyway?
> >
> > Might as well.  No point in writing more productions if it doesn't buy
> > anything.
> 
> Since it's really just two ways of writing the same thing, wouldn't bison
> just produce the exact same C code?  I'll rewrite it anyway for elegance,
> but just wondering...
> 
> > BTW, I've forgotten whether your patch is purely syntactic or not,
> > but I'd really like to see someone fix things so that BETWEEN has its
> > own expression node tree type and is not expanded into some ugly
> > "A>=B and A<=C" equivalent.  This would (a) allow it to be
> > reverse-listed reasonably, and (b) eliminate redundant evaluations of
> > the subexpressions.
> 
> It is purely syntactic.  Anyone want to give me a quick hint on how to make
> a new node tree type for BETWEEN?  What does reverse-listing mean as well?
> 
> Chris
> 
> 
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