On Fri, 27 Oct 2023 15:34:16 +0100
Kerin Millar <[email protected]> wrote:
<snip>
> Keep in mind that the Shell Command Language specification requires that
> "Default Value" parameter expansion be implemented in the way that it is, and
> that there are countless scripts that depend on the status quo. However, the
> Shell Command Language also doesn't suffer from this ambiguity because it
> doesn't specify any means of performing "Substring Expansion" to begin with
> (it's a bash extension). Since there is no way for bash to otherwise know
> that "-10:1" wasn't intended as the word in ${parameter:-word}, you'll have
> to choose a preferred workaround for negative offsets and live with it, as
> irksome as it may be.
Of course, I meant to write "10:1" there, not "-10:1".
--
Kerin Millar
