On Wed, 25 Jan 2023 18:45:32 -0800
Andrew Hewus Fresh <[email protected]> wrote:
> Good news! I got all our patches updated for perl 5.36.0. To skip the
> summary of new features, jump down to the bottom for details on how you
> can help test it.
A few months ago, I put perl 5.36.0 in a macppc's $HOME, but it wasn't
the system perl. Yesterday, I began to use 5.36.0 with your patches
as a powerpc64's system perl.
A few weeks ago I built 5.36.0 (with no patches) for macppc both with
and without -Duse64bitint, thinking of whether to add -Duse64bitint to
our system perl. Now, perl has 32-bit integers on 32-bit platforms
(like macppc) and 64-bit integers on 64-bit platforms. If we add
-Duse64bitint, perl would have 64-bit integers everywhere. I found
that perl with -Duse64bitint runs slightly slower and uses more memory,
so I'm not wanting to add -Duse64bitint now.
$ perl -E 'say ~0'
4294967295 # without
18446744073709551615 # with -Duse64bitint
$ perl -E 'say 1 << 40'
0 # without
1099511627776 # with -Duse64bitint
$ perl -E 'say unpack("Q", "abcdefgh")'
Invalid type 'Q' in unpack at -e line 1. # without
7017280452245743464 # with -Duse64bitint
> The feature that I'm most excited for, and probably what will make me
> `use v5.36` in my scripts is multi-value iteration. Examples from the
> docs:
>
> for my ($key, $value) (%hash) { ... }
> for my ($left, $right, $gripping) (@moties) { ... }
The for_list is still experimental, so if I decide to use it, I will
turn off the warning,
use v5.36;
use experimental 'for_list';
for my ($k, $v) (%ENV) {
say "$k=$v";
}
This ($k, $v) iterates 2 values at a time. The for_list can't iterate
$n values at a time if $n is variable. List::MoreUtils::natatime is
awkward; I might copy the n-ary example from "perldoc -f splice".
--George
