Re: [boost] [TTI] Review for The Type Traits Introspection library by Edward Diener **extended**

Subject: Re: [boost] [TTI] Review for The Type Traits Introspection library by Edward Diener **extended**
From: Edward Diener (eldiener_at_[hidden])
Date: 2011-07-18 19:06:06

On 7/18/2011 11:16 AM, lcaminiti wrote:
>
> Edward Diener-3 wrote:
>>
>> On 7/16/2011 10:58 PM, Jeffrey Lee Hellrung, Jr. wrote:
>>> On Thu, Jul 7, 2011 at 5:15 AM, Joel Falcou<joel.falcou_at_[hidden]>
>>> wrote:
>>>
>>> * Contrary to others opinions, I think Edward should keep both
>>> BOOST_TTI_MACRO and BOOST_TTI_TRAIT_MACRO macros (optionally renaming
>>> them,
>>> if desired; I think these are just following the Boost.MPL naming scheme,
>>> but perhaps we can think of names that evoke the difference a little more
>>> clearly).  It imparts a de facto naming convention for these
>>> metafunctions.
>>> *But* you should include a warning about the possibility to automatically
>>> generate names with double underscores, and that this behavior is
>>> undefined.
>>
>> I will definitely do that. BTW I thought that the double underscores
>> were only considered reserved for the compiler when at the beginning or
>> end of an identifier, but it seems like I am wrong ( haven't found the
>> appropriate comment in the C++ standard ).
>>
>
> A quick search into the ISO C++ standard document for "double underscore"
> shows:
>
> ``
> 17.4.3.1.2 Global names [lib.global.names]
>
> Certain sets of names and function signatures are always reserved to the
> implementation:
>
> - Each name that contains a double underscore (__) or begins with an
> underscore followed by an upper-case letter (2.11) is reserved to the
> implementation for any use.
>
> - Each name that begins with an underscore is reserved to the implementation
> for use as a name in the global namespace.

Got it. Thanks !

Eddie