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Re: PSC #049 2022-01-07

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Karen Etheridge
January 13, 2022 19:06
Re: PSC #049 2022-01-07
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On Sun, Jan 9, 2022 at 4:38 AM Neil Bowers <> wrote:

> Our overriding desire is to get signatures "out there", but what's the
> right next step? There are at least 4 options:
>    1. Remove the experimental sticker off signatures and release that way
>    in 5.36 (so you'd still have to `use feature` or `use v5.36`), but no other
>    changes.
>    2. As for 1, but also add a runtime warning if you touch @_ inside a
>    signatured-sub.
>    3. Like 2, but touching @_ is fatal.
>    4. Inside signatured-subs @_ becomes non-special.
I am sympathetic to the concerns that #2/3/4 will have backcompat issues. I
don't recall what the current situation is regarding cpan smokes, but this
seems like a fairly easy change to make in a side branch and smoke against
cpan to see what might break?  I use signatures a lot in new code, and in
the cases where I touch @_ directly, I don't use a signature for that sub.
Perhaps the majority of users are in the same situation and there won't be
much fallout at all.

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