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Date: Mon, 1 Nov 1999 18:40:25 EST
From: "Douglas A. Gwyn (IST)"
To: jb@peren.com
Subject: HTML source for WG14 N896 (DR 209)
Message-ID: <9911011840.aa18061@soiree.arl.mil>
Content-Type: text
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Status: R
WG14 DR#209:
Problem implementing INTn_C macros
WG14 N896 (J11 99-031)
Defect Report # 209
 
Title:  
Problem implementing INTN_C
macros
Submission date:  
19 Oct. 1999
Submitter:  
Douglas A. Gwyn (J11)
Issue:
The requirements of subclause 7.18.4.1 may be impossible to satisfy
(for N
=8 or 16, typically)
unless an implementation has special (non-standard) support
for integer constants of types char
and short
:
The macro INTN_C(
value)
shall expand to a signed integer constant with the specified value
and type int_leastN_t
.
(Similarly for UINTN_C
.) 
The paragraph preceding this overly restrictive specification
reflects the actual intent:
a type with at least the specified width.
Possible Solutions:
-
Change integer constant to
integer constant expression. 
While this still does not reflect the original intent,
at least it permits accurate implementation
without special support from the compiler.
-
Specify that the type shall be the promoted type
corresponding to
int_leastN_t
.
-
Specify that the type shall be any appropriately signed integer type
of sufficient width.
Proposed Technical Correction:
In subclause 7.18.4.1 paragraph 2,
change the two occurrences of and type
to
and [un]signed integer type at least as wide as.