Failing to understand the oddities of the "line" chunk

[J. Landman Gay]

On 3/18/12 6:52 PM, Alex Tweedly wrote:
> You're right (IMHO) - the original reason I struggled to understand this
> was not the trailing delimiter issue, but rather the incorrect handling
> of 'inverted' ranges in a chunk expression.
>
> There are a variety of possible valid interpretations of a inverted
> range (my opinion is that these are, in order):

An inverted range in character chunking equates to an insertion point. 
I.e., char 2 to 1 of a line is an insertion point after char 1. Testing 
for range inversion is one way to know whether a selection has any content.

The behavior with lines looks like the engine is attempting that but it 
isn't acting the same.

 > put "a"&  cr into t;put "b" into line 2 to -1 of t

equates to "put 'b' into line 2 to 1". If inverted ranges should yield 
an insertion point, then the insertion should go after after line 1. So 
it isn't acting quite the same way but it looks like it's supposed to.

-- 
Jacqueline Landman Gay         |     jacque at hyperactivesw.com
HyperActive Software           |     http://www.hyperactivesw.com