Re: >= and <= for string comparison

[Ruiyang Peng]

On 2023/1/18 16:57, Tapani Tarvainen wrote:
> On Wed, Jan 18, 2023 at 05:36:46PM +0900, Koichi Murase 
> (myoga.murase@gmail.com) wrote:
>
> > If we decide to support `<=' and `>=' for strings, to me, the cleanest
> > solution seems to be reorganizing the lexical rule inside [[ ... ]] to
> > accept <= and >= as single tokens though it would introduce
> > incompatibilities.
> IMHO that's the only alternative that makes sense. Either do it
> that way or don't do it at all.
>
> The obvious ! workaround is better than a new -leq would be.

Makes sense.

After all, the purpose of adding '>=' and '<=' is to unify and they

are not very useful by themselves. Adding -lgt or -sgt makes things

too complicated.

> I don't, however, see the incompatibilities as a big problem, although

> it would probably be necessary to have some means of disabling the

> feature (a switch, POSIXLY_CORRECT &c).

But I don't think it's suitable to only use POSIXLY_CORRECT to turn
this extension on or off.  This extension seems to be incompatible with
many scripts, even those with GNU extensions enabled.


Maybe we need to add a new option for this extension?  The incompatibilities
is _really_ a problem.  I think it's better not to add it now.

--
Ruiyang Peng