Re: How does {x..y} supposed to work?

[Chet Ramey]

On 5/13/21 12:53 PM, Greg Wooledge wrote:
> On Thu, May 13, 2021 at 12:32:07PM -0400, Lawrence Velázquez wrote:
> > The code explicitly wants alphabetics.  The manual could probably
> > stand to be a little more specific than just "characters".
> >
> > https://git.savannah.gnu.org/cgit/bash.git/tree/braces.c?id=ce23728#n497
> >
> >    /* Now figure out whether LHS and RHS are integers or letters.  Both
> >       sides have to match. */
> >    lhs_t = (legal_number (lhs, &tl)) ? ST_INT :
> >                 ((ISALPHA (lhs[0]) && lhs[1] == 0) ?  ST_CHAR : ST_BAD);
>
> One wonders whether this is a bug:

It's not. As long as the endpoints are numbers or letters, it's up to the
caller to manage the results.

The one possible issue (it's come up before) is whether or not this:

> `

should be backslash-quoted to avoid command substitution.


--
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU    chet@case.edu    http://tiswww.cwru.edu/~chet/