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Re: [Help-bash] opposite of 'shift'

From: Chet Ramey
Subject: Re: [Help-bash] opposite of 'shift'
Date: Sat, 14 Jul 2012 14:00:17 -0400

> On 2/17/12 8:25 AM, Pierre Gaston wrote:

> > This is probably because bash lacks an easy way to pass an array by
> > reference to a function.
> This is where a requested feature could make it into bash.  This seems to
> be a common problem with no clean solution (one can only get so far with
> eval and ${!param}).
> The ksh93 `nameref' (typeset -n) feature would solve this.  It's not really
> well documented, and there are many corner cases to catch, but it's not
> that hard to implement.  One example: is it a symlink, where it's resolved
> at reference time, or a pointer, where the reference is assigned at initial
> declaration?  Another set of cases involve the scoping questions if the
> first alternative is chosen.

The next version of bash will have nameref variables and associated support
(declare/local -n, unset -n, slight changes to ${!var}, and so on).

The devel git tree has all of the changes.  If you're interested, check it
out and send me feedback.


``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU    address@hidden    http://cnswww.cns.cwru.edu/~chet/

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