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Re: [perl #132760] Blead Breaks CPAN: YANICK/List-Lazy-0.3.0.tar.gz

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February 22, 2018 17:19
Re: [perl #132760] Blead Breaks CPAN: YANICK/List-Lazy-0.3.0.tar.gz
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Peter Rabbitson wrote:
>The above statement is false.

It still seems true to me.  Perhaps you could explicate what other
advantage the dual-location proposal has, relative to having signatures
after all attributes.

>Zefram's argument over the past several months is predicated on the idea that
>signatures never existed in a stable form within the Perl5 ecosystem, and
>didn't exist at all before 5.22.
>That idea is false (at best)

My argument is in no way predicated on signatures not having existed
before 5.22.  The idea that they didn't exist certainly is false,
and I'm acutely aware of it, due to my role in getting signatures into
5.20 and in arguing against them being damaged into their 5.22 form.
I am mystified as to how you come to think that I would entertain that
patently false idea.

The idea that signatures have never been stable is true, unless you're
playing games with the wording.  The stable releases of Perl that have
included signatures have all included explicit warnings, in documentation
and at compile time, that signatures are experimental.  They have thus
never qualified as a stable feature, in our usual parlance.  Perhaps you
mean something else by "stable", but in that case you'll have to explain
what you mean in order to further your argument.

My argument doesn't entirely depend on the experimental status of
signatures, though because they do have that status I have couched my
argument in that context.  Preceding attributes is the wrong place for
signatures regardless of stability.  Signatures are also much newer
than attributes (and the :lvalue attribute in particular) and tacitly
more experimental, regardless of formal status.  The relevance of the
formal stability status is only to provide a big explicit bias in the
coherence vs stability tradeoff with which we are faced.  It would still
be reasonable to judge in favour of coherence without it.


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