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From: Nevin Liber <nevin@eviloverlord.com>
Newsgroups: gmane.comp.lang.c++.isocpp.proposals
Subject: Re: Remove vector<bool>?
Date: Tue, 28 May 2013 15:12:59 -0500
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On 28 May 2013 15:00, Nicol Bolas <jmckesson@gmail.com> wrote:

>
> Personally, I agree with Howard; we should add a class that has all of
> this functionality (presumably with some degree of required sizing) that
> would be a drop-in replacement for those who need the sizing features of
> vector<bool>. But the question remains: even with a drop-in replacement,
> how much code will be *broken* because of this?
>

There is never any real way to know, but it's been around a long time

The problems with just pulling it are:

1.  Silent changes really annoy users.
2.  It makes migration harder, as you are required to change your code in a
backwards-incompatible way just to get it working under C++17.

For C++17 I think we can deprecate the vector<bool> specialization at the
same time (in favor of no specialization for the subsequent release), but I
don't see just removing it as something that has any chance of passing the
committee.
-- 
 Nevin ":-)" Liber  <mailto:nevin@eviloverlord.com>  (847) 691-1404

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On 28 May 2013 15:00, Nicol Bolas <span dir=3D"ltr">&lt;<a href=3D"mailto:j=
mckesson@gmail.com" target=3D"_blank">jmckesson@gmail.com</a>&gt;</span> wr=
ote:<br><div class=3D"gmail_quote"><blockquote class=3D"gmail_quote" style=
=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">

<br><div>Personally, I agree with Howard; we should add a class that has al=
l of this functionality (presumably with some degree of required sizing) th=
at would be a drop-in replacement for those who need the sizing features of=
 vector&lt;bool&gt;. But the question remains: even with a drop-in replacem=
ent, how much code will be <i>broken</i> because of this?<br clear=3D"all">

</div></blockquote><div><br>There is never any real way to know, but it&#39=
;s been around a long time<br><br>The problems with just pulling it are:<br=
><br>1.=A0 Silent changes really annoy users.<br>2.=A0 It makes migration h=
arder, as you are required to change your code in a backwards-incompatible =
way just to get it working under C++17.<br>

<br></div></div>For C++17 I think we can deprecate the vector&lt;bool&gt; s=
pecialization at the same time (in favor of no specialization for the subse=
quent release), but I don&#39;t see just removing it as something that has =
any chance of passing the committee.<br>

-- <br>=A0Nevin &quot;:-)&quot; Liber=A0 &lt;mailto:<a href=3D"mailto:nevin=
@eviloverlord.com" target=3D"_blank">nevin@eviloverlord.com</a>&gt;=A0 (847=
) 691-1404

<p></p>

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