Issue 0275: bitwise-OR of nothing

This issue has been automatically converted from the original issue lists and some formatting may not have been preserved.

Authors: Clive D.W. Feather <clive@demon.net>, UK C Panel
Date: 2001-09-07
Submitted against: C99
Status: Fixed
Fixed in: C99 TC2
Converted from: summary-c99.htm, dr_275.htm

Problem

FE_ALL_EXCEPT is defined in 7.6#6 as:

[#6] The macro

            FE_ALL_EXCEPT

is simply the bitwise OR of all floating-point exception macros defined by the implementation.

If no floating-point exception macros are defined, is FE_ALL_EXCEPT:

• required to be defined as zero
• required to be undefined
• unspecified whether it is either of the above ?

[This appears to be the only case of its kind.]

Suggested Technical Corrigendum

Append to 7.6#6:

If no such macros are defined, FE_ALL_EXCEPT can either be defined as 0 or left undefined.

Comment from WG14 on 2002-05-15:

Technical Corrigendum

Append to 7.6#6:

If no such macros are defined, FE_ALL_EXCEPT shall be defined as 0.