[Cfp-interest] bool b = SNAN;

[James W Thomas]

On Jun 12, 2013, at 12:28 PM, Fred J. Tydeman <tydeman at tybor.com> wrote:

> My understanding of C11 along with our CFP part 1, is that
>  bool b = SNAN;
> 'b' shall have the value 1, and 'invalid' shall not be raised.

Invalid may be raised, depending on the implementation's support for signaling NaNs.

> 
> C11 6.3.1.2 is where I get the value 1.
> C11 F.4 is where I get no 'invalid'.

The statement in F.4 doesn't apply to signaling NaNs, because in Annex F unqualified NaN means quiet NaN.

-Jim

> 
> Does this contradict CFP Part 1, printed page 19, F.2.1, [3],
> [5], and [6]?
> 
> ---
> Fred J. Tydeman        Tydeman Consulting
> tydeman at tybor.com      Testing, numerics, programming
> +1 (775) 287-5904      Vice-chair of PL22.11 (ANSI "C")
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