Re: namespace
David Bellot via ublas <[email protected]> Fri, 31 May 2019 14:35:11 +1000
| Newsgroups | gmane.comp.lib.boost.ublas |
|---|---|
| Message-ID | <CAOE6ZJHY3t+QXPw0MTDVp2WbGXyuZJjU6Jwgy_uidy4p-1fKFQ@mail.gmail.com> |
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I never tried with complicated structures, but as far as I know, we can
simply do something like:
namespace boost::ublas
{
bla bla bla...
}
namespace boost::numeric::ublas
{
using namespace boost::ublas;
}
I just wonder why none of gcc and clang complain about that. I'm obviously
missing something because the recursion should be infinite,shouldn't it?
https://en.cppreference.com/w/cpp/language/namespace#Using-directives
On Fri, May 31, 2019 at 10:30 AM Stefan Seefeld via ublas <
[email protected]> wrote:
>
> On 2019-05-30 8:07 p.m., David Bellot via ublas wrote:
>
> By the way, can I open a flame war on this list? :-D
>
> I doubt it. If you want a flame war, go to the boost list ! ;-)
>
> What's about getting ublas out of the namespace numeric. The sub-namespace
> numeric has never been used as expected in the early days:
> - in most of the code I saw so far, people are doing a using namespace
> boost::numeric.
> - you can't seriously type boost::numeric::ublas::fct(x,y) like you type
> std::fct(x,y). I mean, std is 3 characters only.
> - can we find a way to inject a new boost::ublas into boost::numeric to
> keep backward compatibility
>
> As ublas is going through massive changes and improvements (thanks Cem,
> Stefan, Paul, Thomas, <put your name here>,...), it's about time to think
> about these little details too which would give ublas a new face and
> simplify users' life.
>
> +1
>
> [image: Stefan]
> --
>
> ...ich hab' noch einen Koffer in Berlin...
>
> _______________________________________________
> ublas mailing list
> [email protected]
> https://lists.boost.org/mailman/listinfo.cgi/ublas
> Sent to: [email protected]
>
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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">I never tried with complicated structur=
es, but as far as I know, we can simply do something like:</div><div class=
=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-siz=
e:small"><br></div><div class=3D"gmail_default" style=3D"font-size:small"><=
font face=3D"courier new, monospace">namespace boost::ublas</font></div><di=
v class=3D"gmail_default" style=3D"font-size:small"><font face=3D"courier n=
ew, monospace">{</font></div><div class=3D"gmail_default" style=3D"font-siz=
e:small"><font face=3D"courier new, monospace">=C2=A0 =C2=A0bla bla bla...<=
/font></div><div class=3D"gmail_default" style=3D"font-size:small"><font fa=
ce=3D"courier new, monospace">}</font></div><div class=3D"gmail_default" st=
yle=3D"font-size:small"><font face=3D"courier new, monospace"><br></font></=
div><div class=3D"gmail_default" style=3D"font-size:small"><font face=3D"co=
urier new, monospace">namespace boost::numeric::ublas</font></div><div clas=
s=3D"gmail_default" style=3D"font-size:small"><font face=3D"courier new, mo=
nospace">{<br>=C2=A0 =C2=A0 =C2=A0using namespace boost::ublas;</font></div=
><div class=3D"gmail_default" style=3D"font-size:small"><font face=3D"couri=
er new, monospace">}</font></div><div class=3D"gmail_default" style=3D"font=
-family:arial,helvetica,sans-serif;font-size:small"><br></div><div class=3D=
"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:s=
mall">I just wonder why none of gcc and clang complain about that. I'm =
obviously missing something because the recursion should be infinite,should=
n't it?=C2=A0<a href=3D"https://en.cppreference.com/w/cpp/language/name=
space#Using-directives" style=3D"font-family:Arial,Helvetica,sans-serif">ht=
tps://en.cppreference.com/w/cpp/language/namespace#Using-directives</a></di=
v><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-se=
rif;font-size:small"><br></div></div><br><div class=3D"gmail_quote"><div di=
r=3D"ltr" class=3D"gmail_attr">On Fri, May 31, 2019 at 10:30 AM Stefan Seef=
eld via ublas <<a href=3D"mailto:[email protected]">[email protected]=
t.org</a>> wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"ma=
rgin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:=
1ex">
=20
=20
=20
<div bgcolor=3D"#FFFFFF">
<p><br>
</p>
<div class=3D"gmail-m_1648582027727227074moz-cite-prefix">On 2019-05-30=
8:07 p.m., David Bellot
via ublas wrote:<br>
</div>
<blockquote type=3D"cite">
=20
<div dir=3D"ltr">
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,s=
ans-serif;font-size:small">By
the way, can I open a flame war on this list? :-D</div>
</div>
</blockquote>
<p>I doubt it. If you want a flame war, go to the boost list ! ;-)<br>
</p>
<blockquote type=3D"cite">
<div dir=3D"ltr">
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,s=
ans-serif;font-size:small">What's
about getting ublas out of the namespace numeric. The
sub-namespace numeric has never been used as expected in the
early days:</div>
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,s=
ans-serif;font-size:small">-
in most of the code I saw so far, people are doing a using
namespace boost::numeric.<br>
</div>
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,s=
ans-serif;font-size:small">-
you can't seriously type boost::numeric::ublas::fct(x,y) like
you type std::fct(x,y). I mean, std is 3 characters only.<br>
</div>
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,s=
ans-serif;font-size:small">-
can we find a way to inject a new boost::ublas into
boost::numeric to keep backward compatibility</div>
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,s=
ans-serif;font-size:small"><br>
</div>
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,s=
ans-serif;font-size:small">As
ublas is going through massive changes and improvements
(thanks Cem, Stefan, Paul, Thomas, <put your name
here>,...), it's about time to think about these little
details too which would give ublas a new face and simplify
users' life.</div>
</div>
</blockquote>
<p>+1</p>
<div class=3D"gmail-m_1648582027727227074moz-signature">
<div class=3D"gmail-m_1648582027727227074moz-signature">
<div class=3D"gmail-m_1648582027727227074moz-signature">
<pre><img src=3D"cid:16b0c259eccf78352851" alt=3D"Stefan" width=
=3D"123" height=3D"77">
--=20
...ich hab' noch einen Koffer in Berlin...
</pre>
</div>
</div>
</div>
</div>
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errer" target=3D"_blank">https://lists.boost.org/mailman/listinfo.cgi/ublas=
</a><br>
Sent to: <a href=3D"mailto:[email protected]" target=3D"_blank">david.=
[email protected]</a><br>
</blockquote></div>
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