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Newsgroups: gmane.comp.lang.c++.isocpp.proposals
Subject: Re: optional<T>, one more value or two states
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W dniu czwartek, 24 stycznia 2013 14:52:22 UTC+1 u=BFytkownik Zhihao Yuan=
=20
napisa=B3:
>
> On Thu, Jan 24, 2013 at 7:38 AM, Ville Voutilainen=20
> <ville.vo...@gmail.com <javascript:>> wrote:=20
> > I have since cured that problem in my head, there's no 'danger' involve=
d=20
> in=20
> > it.=20
>
> The danger already shows up.=20
>
> Quoting from the proposal:=20
>
>   "Such implicit conversions impose some risk of introducing bugs,=20
>    and in fact in order to avoid one such possible bug we had to 'poison'=
=20
>    comparisons between optional<T> and T."=20
>
> And a carefully specified comparison logic is under discussion.=20
>

The perceived danger is the opinion of the authors (myself included).=20
Others in the forum do not necessarily share this opinion.

--=20

---=20
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ls/?hl=3Den.



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<br><br>W dniu czwartek, 24 stycznia 2013 14:52:22 UTC+1 u=BFytkownik Zhiha=
o Yuan napisa=B3:<blockquote class=3D"gmail_quote" style=3D"margin: 0;margi=
n-left: 0.8ex;border-left: 1px #ccc solid;padding-left: 1ex;">On Thu, Jan 2=
4, 2013 at 7:38 AM, Ville Voutilainen
<br>&lt;<a href=3D"javascript:" target=3D"_blank" gdf-obfuscated-mailto=3D"=
M5WyFuZcwtAJ">ville.vo...@gmail.com</a>&gt; wrote:
<br>&gt; I have since cured that problem in my head, there's no 'danger' in=
volved in
<br>&gt; it.
<br>
<br>The danger already shows up.
<br>
<br>Quoting from the proposal:
<br>
<br>&nbsp; "Such implicit conversions impose some risk of introducing bugs,
<br>&nbsp; &nbsp;and in fact in order to avoid one such possible bug we had=
 to 'poison'
<br>&nbsp; &nbsp;comparisons between optional&lt;T&gt; and T."
<br>
<br>And a carefully specified comparison logic is under discussion.
<br></blockquote><div><br>The perceived danger is the opinion of the author=
s (myself included). Others in the forum do not necessarily share this opin=
ion.<br></div>

<p></p>

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posals/?hl=3Den</a>.<br />
&nbsp;<br />
&nbsp;<br />

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