[Cfp-interest 2999] <math.h> macros and exceptions

[Fred J. Tydeman]

On Wed, 7 Feb 2024 19:37:46 +0000 Rajan Bhakta wrote:
>
>        Jim:  Are there any <math.h> macros with this issue?  Should words be added to an introduction section in <float.h>?
>        ^Fred: Look into.

<math.h> macros that should not raise exceptions when evaluated:

HUGE_VAL, HUGE_VALF, HUGE_VALL, HUGE_VAL_D*
INFINITY, DEC_INFINITY
NAN, DEC_NAN


Aside:  Should 7.12.1#5 (overflow) mention HUGE_VAL_D*?

SNAN macro "requirement" is in a Recommended practice in F.2.1.

FLTn_SNAN, DECn_SNAN, FLTnx_SNAN, DECnx_SNAN in H.3#6
HUGE_VAL_Fn, HUGE_VAL_Dn, HUGE_VAL_Fnx, HUGE_VAL_Dnx in H.11.1

Aside:  5.2.4.2.2#22 mentions SNAN for translation time initializer,
while H.3#6 mentions static or thread storage duration.


---
Fred J. Tydeman        Tydeman Consulting
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