Re: difference between ~ & ^ negation

[Mikael Magnusson <mikachu@gmail.com>]

On 2 January 2014 22:36, Bart Schaefer <schaefer@brasslantern.com> wrote:
> On Jan 2,  9:01pm, Peter Stephenson wrote:
> } Subject: Re: difference between ~ & ^ negation
> }
> } On Wed, 01 Jan 2014 13:44:59 -0800
> } Bart Schaefer <schaefer@brasslantern.com> wrote:
> } > Important note: ^ is special only in cases where / is special (globs).
> }
> } That's not true...
> }
> } setopt extendedglob
> } [[ foo = ^foo ]] || print foo actually is foo
> } [[ bar = ^foo ]] && print but bar is not foo
> }
> } "^" is still special here; the difference is that if a "/" appeared
> } after it *that* wouldn't be special in this context
>
> Hmm.  So what does that mean about a "^" appearing after a "^" ?  That
> is, since / is not special, the expression ^foo/^bar means something
> completely different in pattern context and file generation context?
>
> That second caret is the usage I was referring to when I said "only in
> cases where / is special".  (Whether or not there is a leading caret.)
>

I think of ^foo as a * that won't match "foo", so you can have
foo/bar^baz and it would match bar* but not barbaz, and if you think
of it like that it's not really that confusing. ^foo/^bar is then just
*/* that won't match */bar or foo/*.

-- 
Mikael Magnusson