Re: [boost] Formal Review for Interval Library

From: Kevin Lynch (krlynch_at_[hidden])
Date: 2002-09-10 17:00:17

>>>rounded_transc.hpp
>>>~~~~~~~~~~~~~~~~
>>>
>>>1) Why are these hyperbolic functions over T unqualified?
>>>
>>>#ifdef BOOST_HAVE_INV_HYPERBOLIC
>>>    T asinh_down(const T& x) { return ::asinh(x); }
>>>    T asinh_up  (const T& x) { return ::asinh(x); }
>>>    T acosh_down(const T& x) { return ::acosh(x); }
>>>    T acosh_up  (const T& x) { return ::acosh(x); }
>>>    T atanh_down(const T& x) { return ::atanh(x); }
>>>    T atanh_up  (const T& x) { return ::atanh(x); }
>>>#endif
>>
>>Somebody else will probably answer. But I seem to remember the Standard
>>doesn't require these functions of <cmath> to be defined in the namespace
>>'std'. It was also discussed on gcc mailing-list (I hope my memory
>>doesn't fail me).
>>
> 
> I see.
> I don't know about that, -though I thought ALL std functions go in std::-.
> Perhaps someone else can inform us.
> 

The inverse hyperbolics didn't appear in math.h until C99; in other 
words, they aren't technically part of C89/C++98.  Since std is (more or 
less) closed by fiat, they really shouldn't appear in std (<cmath> is 
section 26.5, I think ... but it might be 25.6)

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