Front page | perl.perl5.porters |
Postings from June 2020
Re: Announcing Perl 7
June 26, 2020 15:50
Re: Announcing Perl 7
Message ID: CANgJU+UAU2iR24qLRMP_8p-ks0GM8U7hKAOx4299oTo74oNgww@mail.gmail.com
On Fri, 26 Jun 2020 at 17:29, Dave Mitchell <firstname.lastname@example.org> wrote:
> On Fri, Jun 26, 2020 at 05:10:57PM +0200, demerphq wrote:
> > My understanding is any existing code which has "use strict;" will be
> > fine as "use strict" will be the same "use perl5-semantics" or
> > whatever the syntaxt will be. Thus relatively little will break.
> This seems to be an important and fundamental disagreement or
> misunderstanding between us, and I think it needs resolving before
> anything else gets discussed.
Ok, so just to be clear, my understanding that "use strict" and "no
strict" will be equivalent to "use perl-5-semantics; use strict;" and
"use perl-5-semantics; no strict;".
Whatever the semantics are. Since most cases people tend to do this:
assuming i am right this is seems to cover making old code continue to
work as though it had been modified to read:
> My understanding was that, by default, perl7 will enable many of the
> optional features available via 'use feature X' and/or 'use v5.32.0',
> plus possibly some other stuff.
Yes, unless you request perl-5 semantics by saying "use strict;" or
"use perl-5-semantics;" (however it is spelled in practice)
> I think that this will break a *lot* of existing code and CPAN modules.
> Which is at the heart of my objection.
If I am right about strict do you agree that the scope of breakage
will be much smaller than if I am wrong?
> For example, disabling indirect object syntax by default will break
> all code containing
> my $foo = new Foo(...);
> which is still a commonly-used idiom.
I don't have that impression. We have none at work for instance. But
ok. But i think most of it runs inside of `use strict;`
> Enabling signatures by default will make it nearly impossible to portably
> write code which uses subroutine prototypes. (Seriously, try the challenge
> I set in my previous email).
Ill take another look, but again, since I can just say:
then surely it can't be impossible?
> Enabling 'use utf8' or 'feature_unicode' by default will silently change
> the semantics of code.
Again, if this only applies to code not running under use strict I
dont think it will be a big deal.
perl -Mre=debug -e "/just|another|perl|hacker/"