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List:       cfe-dev
Subject:    Re: [cfe-dev] [PROPOSAL] Reintroduce guards for Intel intrinsic headers
From:       James Dennett <james.dennett () gmail ! com>
Date:       2015-07-30 18:34:00
Message-ID: CAKNGpgqC3nXssyNQRcKcqoCiu97nRzfBm1HofvZprGFQakCP1g () mail ! gmail ! com
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On Thu, Jul 30, 2015 at 11:04 AM, Reid Kleckner <rnk@google.com> wrote:

> On Thu, Jul 30, 2015 at 10:33 AM, Eric Christopher <echristo@gmail.com>
> wrote:
>>
>> What kind of file is this? Keep in mind that things in the global
>> namespace prefixed with an underscore is a reserved name for implementers
>> as well. That would make this code not standards compliant as well.
>>
>
> The actual C++ rules are that any name with double underscores is
> reserved, and names beginning with an underscore followed by a capital
> letter.
>

Also, any name starting with an underscore _in the global namespace_.
 [global.names]/2, "Each name that begins with an underscore is reserved to
the implementation for use as a name in the global namespace."


> So, the Intel intrinsics are *not* in the implementer's namespace, but
> that was probably a mistake.
>

Given [global.names]/2, they are in the implementer's namespace (presumably
as intended).

-- James

[Attachment #5 (text/html)]

<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Thu, Jul 30, 2015 \
at 11:04 AM, Reid Kleckner <span dir="ltr">&lt;<a href="mailto:rnk@google.com" \
target="_blank">rnk@google.com</a>&gt;</span> wrote:<br><blockquote \
class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc \
solid;padding-left:1ex"><div dir="ltr"><div class="gmail_extra"><div \
class="gmail_quote"><span class="">On Thu, Jul 30, 2015 at 10:33 AM, Eric Christopher \
<span dir="ltr">&lt;<a href="mailto:echristo@gmail.com" \
target="_blank">echristo@gmail.com</a>&gt;</span> wrote:<blockquote \
class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc \
solid;padding-left:1ex"><div dir="ltr"><div class="gmail_quote"><div>What kind of \
file is this? Keep in mind that things in the global namespace prefixed with an \
underscore is a reserved name for implementers as well. That would make this code not \
standards compliant as \
well.</div></div></div></blockquote><div><br></div></span><div>The actual C++ rules \
are that any name with double underscores is reserved, and names beginning with an \
underscore followed by a capital letter. \
</div></div></div></div></blockquote><div><br></div><div>Also, any name starting with \
an underscore _in the global namespace_.   [global.names]/2, &quot;Each name that \
begins with an underscore is reserved to the implementation for use as a name in the \
global namespace.&quot;</div><div>  </div><blockquote class="gmail_quote" \
style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div \
dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><div>So, the Intel \
intrinsics are *not* in the implementer&#39;s namespace, but that was probably a \
mistake.</div></div></div></div></blockquote><div><br></div><div>Given \
[global.names]/2, they are in the implementer&#39;s namespace (presumably as \
intended).</div><div><br></div><div>-- James</div><div><br></div></div></div></div>



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