Re: [boost] [config] Macro for null pointer

Subject: Re: [boost] [config] Macro for null pointer
From: Antony Polukhin (antoshkka_at_[hidden])
Date: 2012-11-16 01:39:30

2012/11/16 Jeffrey Lee Hellrung, Jr. <jeffrey.hellrung_at_[hidden]>:
> On Thu, Nov 15, 2012 at 7:04 PM, Edward Diener <eldiener_at_[hidden]>wrote:
>
>> I have found something like this to be helpful, when working with multiple
>> compilers:
>>
>> #include <boost/config.hpp>
>> #if defined(BOOST_NO_NULLPTR)
>> #define BOOST_XXX_NULLPTR 0
>> #else
>> #define BOOST_XXX_NULLPTR nullptr
>> #endif
>>
>> where XXX is some local name for my own use. And then use
>> BOOST_XXX_NULLPTR in places where a null pointer is needed.
>>
>> Would this be a candidate for a BOOST_NULLPTR macro in the config library
>> instead ?
>>
>
> Might it be better to just offer a (albeit imperfect) nullptr emulation if
> not supplied by the compiler? For example, [1].
>
> - Jeff
>
> [1] http://en.wikibooks.org/wiki/More_C%2B%2B_Idioms/nullptr

`nullptr_t` is also required for libraries (especially for
Boost.SmartPtr). So there must be a macro for it too.

And may be we shall typedef nullptr_t as boost::none_t ?

--
Best regards,
Antony Polukhin