[Cfp-interest 1234] Re: Max printf NaN

[Jim Thomas]

> On Nov 28, 2018, at 12:52 PM, Fred J. Tydeman <tydeman at tybor.com> wrote:
> 
> Add to 7.21 <stdio.h>, paragraph 3 [macros], 
> 
> _MAX_PRINTF_NAN
> 
> which expands to an integer constant expression (suitable for use in
> #if preprocessing directives) that is the maximum number of characters
> output for any [-]NAN(n-char-sequence) [footnote].

I think this needs to refer to output by the fprintf and fwfprintf family. (Not sure if the reference to fwfprintf is needed or inferable.)
> 
> [footnote]If the implementation only uses the [-]NAN style, then
> _MAX_PRINTF_NAN would have the value 4.

This needs to be in the main text, not just a footnote. The main text as is covers just the [-]NAN(n-char-sequence) form.

Jim

> 
> 
> ---
> Fred J. Tydeman        Tydeman Consulting
> tydeman at tybor.com      Testing, numerics, programming
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