On 11/28/18 2:29 AM, Bize Ma wrote:
> Chet Ramey (<chet.ra...@case.edu <mailto:chet.ra...@case.edu>>) wrote:
>
> On 11/24/18 4:32 PM, Bize Ma wrote:
>
> [...]
>
> > I have been made aware that there is a
> > cstart = cend = FOLD (cstart);
> > inside the `sm_loop.c` file that will convert into a range many
> > individual character. If that understanding is correct that is the
> > source of the difference with other shells.
>
> I'm not sure what you mean by "convert into a range." If cstart and cend
> were treated as a range, the start end and end characters would be the
> same. If cstart == cend, a character that collates >= cstart and <= cend
> would have to collate equal to cstart and cend.
>
>
> Yes, exactly, a range where the start and the end are the same.
A range like that is exactly equivalent to a single ordinary character.
POSIX: "An ordinary character in the list should only match that character,
but may match any single character that collates equally with that
character"
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU c...@case.edu http://tiswww.cwru.edu/~chet/
