[perl #113792] Unused punctuation variables don't interpolate

On Fri Jun 22 12:57:15 2012, ikegami@adaelis.com wrote:
> $ perl -E'"abc" =~ /(b)/; say "@+"'
> 2 2
> 
> $ perl -E'@_ = qw( a b c ); say "@_"'
> a b c
> 
> $ perl -E'@. = qw( a b c ); say "@."'
> @.
> 
> $ perl -E'@. = qw( a b c ); say "@{.}"'
> a b c
> 
> What's up with #3?

toke.c special-cases certain punct vars.  Without thinking about this in
detail, my gut feeling is that allowing "@." will open up a can of worms.

Also, there may be people wholly unintentionally relying on this.  I
know many times I’ve forgotten to escape my @’s and wondered why they
were disappearing.

-- 

Father Chrysostomos


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via perlbug:  queue: perl5 status: new
https://rt.perl.org:443/rt3/Ticket/Display.html?id=113792

• [perl #113792] Unused punctuation variables don't interpolate by Father Chrysostomos via RT
• [perl #113792] Unused punctuation variables don't interpolate by Eric Brine via RT
• [perl #113792] Unused punctuation variables don't interpolate by Father Chrysostomos via RT
• [perl #113792] Unused punctuation variables don't interpolate by Mike Pomraning via RT
• Re: [perl #113792] Unused punctuation variables don't interpolate by Eric Brine
• [perl #113792] Unused punctuation variables don't interpolate by Eric Brine
• Re: [perl #113792] Unused punctuation variables don't interpolate by Tom Christiansen
• Re: [perl #113792] Unused punctuation variables don't interpolate by Eric Brine