[Cfp-interest 2964] Re: footnote to clarify WANT macro requirement for decimal types

[Jim Thomas]

The “shall” in the footnote is intended to be a restatement of a requirement made elsewhere in the document, not an additional requirement. However, it might help avoid confusion (and maybe a formal rule) if we change “shall be declared” to “are declared”.

- Jim Thomas

> On Nov 10, 2023, at 6:18 PM, Fred J. Tydeman <tydeman at tybor.com> wrote:
> 
> On Fri, 10 Nov 2023 09:16:34 -0800 Jim Thomas wrote:
>> 
>> Regarding action item
>> 
>>>    Jim: Add a footnote to Part 4, Clause 6 when it describes dN for N != 32, 64, 128 to say N = 32, 64, 128 are covered due to them being 60559 types and covered in Annex F.
>> 
>> 
>> I suggest adding a footnote in Clause 6 to the sentence:
>> 
>> An implementation shall declare the functions suffixed with dN for N  32, 64 or 128 or with dNx only if it supports the corresponding decimal floating type and the macro __STDC_WANT_IEC_60559_TYPES_EXT__ is defined at the point in the code where <reduc.h> is first included.
>> 
>> where the footnote is:
>> 
>> For N = 32, 64 and 128, the functions suffixed with dN shall be declared if the implementation supports decimal floating types (i.e. defines __STDC_IEC_60559_DFP__), without the requirement that the macro __STDC_WANT_IEC_60559_TYPES_EXT__ be defined.
>> 
>> 
>> Please send any comments to CFP ASAP.
> 
> I am not sure a 'shall' can be in a footnote.
> 
> 
> ---
> Fred J. Tydeman        Tydeman Consulting
> tydeman at tybor.com <mailto:tydeman at tybor.com>      Testing, numerics, programming
> +1 (702) 608-6093      Vice-chair of INCITS/C (ANSI "C")
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