Public Comment Number PC-UK0119

ISO/IEC CD 9899 (SC22N2620) Public Comment

=========================================== 

Date: 1998-02-25
Author: N.M Maclaren
Author Affiliation: Self
Postal Address:
    University of Cambridge,
    Computer Laboratory,
    New Museums Site,
    Pembroke Street,
    Cambridge CB3 3QG,
    United Kingdom
E-mail Address: <nmm1@cam.ac.uk>
Telephone Number: +44 1223 334761
Fax Number:       +44 1223 334679
Number of individual comments: 1


Comment 1. 

Category: Request for information/clarification

Committee Draft subsection: 5.2.4.2.2

Title: Ambiguity in specification of FLT_ROUNDS


Detailed description:

There is a slight ambiguity in that it is not actually stated whether
FLT_ROUNDS can be set by the programmer directly (i.e. by assigning a value
to it).  And, as its value can be changed, this is confusing.  I suggest
adding to the beginning of paragraph 5 something like:

    FLT_ROUNDS shall expand to an expression that evaluates to the current
    value of the rounding mode.  If FLT_ROUNDS is used in a context where
    a lvalue is required, the behaviour is undefined.