Re: [perl #75596] Iterator not reset on array assignment

On Mon, Jun 07, 2010 at 02:27:33PM -0700, [email protected] wrote:
> # New Ticket Created by  [email protected] 
> # Please include the string:  [perl #75596]
> # in the subject line of all future correspondence about this issue. 
> # <URL: http://rt.perl.org/rt3/Ticket/Display.html?id=75596 >
> 
> 
> This is a bug report for perl from [email protected],
> generated with the help of perlbug 1.39 running under perl 5.10.1.
> 
> 
> -----------------------------------------------------------------
> [Please describe your issue here]
> 
> Perl doesn't reset the array iterator when the array is cleared :
> 
>     $ perl5.12.1-64 -M5.012 -E 'my @a = "a" .. "c"; my ($i, $v) = each @a; say "$i: $v"; @a = "A" .. "C"; ($i, $v) = each @a; say "$i: $v"'
>     0: a
>     1: B
> 
> The issue is still present in 5.13.1.


Interesting. My first reaction was, "it probably should reset the iterator".
But then I wondered, what if one had written C<< $a [1] = "B" >> instead of
C<< @a = "A" .. "C" >>? Should the iterator be reset then? What on
C<< @a [0 .. 2] = "A" .. "C" >>? Should shift, pop, push, unshift, splice
reset the iterator? Currently none of them do.

Even C<< undef @a; @a = "A" .. "C"; >> doesn't reset the iterator.


Abigail