Re: WIP: RangeTypes

On Mon, Jan 17, 2011 at 01:09:26PM -0800, Jeff Davis wrote:
> When defining generic range functions, there is quite a bit of extra
> complexity needed to handle special cases.
> 
> The special cases are due to:
>  * empty ranges
>  * ranges with infinite boundaries
>  * ranges with NULL boundaries
>  * ranges with exclusive bounds (e.g. "(" or ")").
> 
> Infinite bounds, and exclusive bounds can both be handled somewhat
> reasonably, and the complexity can be somewhat hidden.  Empty ranges
> are a special case, but can be handled at the top of the generic
> function in a straightforward way.
> 
> NULL bounds, however, have been causing me a little frustration.
> [Explanation and illustrations].

In that case, let's leave them out for this cut.

Cheers,
David.
-- 
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