Re: [boost] BOOST_NO_INTRINSIC_INT64_T

Subject: Re: [boost] BOOST_NO_INTRINSIC_INT64_T
From: Robert Ramey (ramey_at_[hidden])
Date: 2009-03-25 13:04:15

FWIW - here is what I've been using up until now:

// determine if its necessary to handle (u)int64_t specifically
// i.e. that its not a synonym for (unsigned) long
// if there is no 64 bit int or if its the same as a long
// we shouldn't define separate functions for int64 data types.
#if defined(BOOST_NO_INT64_T)
    #define BOOST_NO_INTRINSIC_INT64_T
#else
    #if defined(ULLONG_MAX)
        #if(ULONG_MAX == 18446744073709551615ul) // 2**64 - 1
            #define BOOST_NO_INTRINSIC_INT64_T
        #endif
    #elif defined(ULONG_MAX)
        #if(ULONG_MAX != 0xffffffff && ULONG_MAX == 18446744073709551615ul) 
// 2**64 - 1
            #define BOOST_NO_INTRINSIC_INT64_T
        #endif
    #else
        #define BOOST_NO_INTRINSIC_INT64_T
    #endif
#endif

Robert Ramey

Beman Dawes wrote:
> On Tue, Mar 24, 2009 at 8:05 AM, John Maddock
> <john_at_[hidden]> wrote:
>>> On Tue, Mar 24, 2009 at 1:38 AM, Robert Ramey <ramey_at_[hidden]>
>>> wrote:
>>>>
>>>> boost config includes BOOST_NO_INTRINSIC_WCHAR_T.
>>>>
>>>> boost Is there any chance we might see BOOST_NO_INTRINSIC_INT64_T
>>>> appear in the near future?
>>>
>>> Should we reserve the BOOST_NO_* names for broken compilers that
>>> fail to correctly support a language or standard library feature?
>>
>> Yes.
>>
>>> In other words, should these two be named:
>>>
>>> BOOST_HAS_INTRINSIC_WCHAR_T
>>> BOOST_HAS_INTRINSIC_INT64_T
>>
>> Well... last I looked an intrinsic wchar_t (ie not a typedef for an
>> int type) *was* a std feature :-)
>
> I guess "INTRINSIC" is confusing me. I assumed it meant the compiler
> was dealing with those types by inlining assembler code rather than
> calling functions, in the same sense as the word is used for intrinsic
> functions.
>
> So I withdraw my objection.
>
> Thanks,
>
> --Beman
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