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Re: How we deprecate (was Re: Deprecating '\w {' in v5.16)

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January 31, 2012 01:44
Re: How we deprecate (was Re: Deprecating '\w {' in v5.16)
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On Mon, Jan 30, 2012 at 08:00:14PM -0500, David Golden wrote:
> On Mon, Jan 30, 2012 at 6:57 PM, Ricardo Signes
> <> wrote:
> > Please let me know whether I understand properly.  Here is an example based on
> > my understanding of your suggestion.  Please note that, for the sake of
> > simplicity, I have not included behavior in this example.
> >
> > 1. We realize that adding foozles was a horrible mistake.
> > 2. We add "foozles" to the Future Deprecations section of perl5200delta
> > 3. In 5.21.0, we add the deprecation warning.
> > 4. In 5.23.0, we remove foozles.
> Correct.  With the annual release cycle, that's a two year period from
> stable-release "notice of future removal" to stable-release "removal",
> one year without warnings and one with.

That makes me more happy than adding a deprecation warning as soon as we
realize foozles was a mistake and is deemed to be removed.

It gives people a chance to act without being nagged on each and every
run of the program. Now, it may be useful if there was a "predeprecation"
category, which by default is *off* on a plain "no warnings;", in that case,
we'd add a predeprecation warning for foozle in 5.19.0, and upgrade it to
a deprecation warning in 5.21.0 (kind of like Yves plan, while keeping the
current deprecation warning untouched).


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