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Postings from February 2013
On Tue, Feb 19, 2013 at 10:53:41PM +0100, Rafael Garcia-Suarez wrote:
> On 19 February 2013 22:41, Jesse Luehrs <doy@tozt.net> wrote:
> > On Tue, Feb 19, 2013 at 10:37:31PM +0100, Rafael Garcia-Suarez wrote:
>
> > This is still exactly dynamic scoping, as far as I can see. Compare:
> >
> > $ perl -E'sub foo { say $::foo } local $::foo = "f"; foo'
> > f
> >
> > $ perl -E'sub foo { say $::foo || "nothing" } { local $::foo = "f" } foo'
> > nothing
>
> I stand corrected. (Pretty sure the internals don't do a full
> localisation though :)
It's the "current successfully matched RE" (PL_curpm) which is localised
and updated on each scope exit; $1 et al just act like tied vars (well,
magic actually) that retrieve a string from the current pattern match -
which includes (possibly a copy of) the original string plus capture index
pairs.
--
Hofstadter's Law: It always takes longer than you expect, even when you
take into account Hofstadter's Law.
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