Section: 3.4 [dec.tr::trdec.types.cdecfloat] Status: TRDec Submitter: Robert Klarer Opened: 2006-10-17 Last modified: 2016-01-31
Priority: Not Prioritized
View all issues with TRDec status.
Discussion:
In Berlin, WG14 decided to drop the <decfloat.h> header. The contents of that header have been moved into <float.h>. For the sake of C compatibility, we should make corresponding changes.
Proposed resolution:
1. Change the heading of subclause 3.4, "Headers <cdecfloat> and <decfloat.h>" to "Additions to headers <cfloat> and <float.h>."
2. Change the text of subclause 3.4 as follows:
The standard C++ headers<cfloat>and<float.h>define characteristics of the floating-point typesfloat,double, andlong double. Their contents remain unchanged by this Technical Report.
Headers<cdecfloat>and<decfloat.h>define characteristics of the decimal floating-point typesdecimal32,decimal64, anddecimal128. As well,<decfloat.h>defines the convenience typedefs_Decimal32,_Decimal64, and_Decimal128, for compatibilty with the C programming language.The header
<cfloat>is described in [tr.c99.cfloat]. The header<float.h>is described in [tr.c99.floath]. These headers are extended by this Technical Report to define characteristics of the decimal floating-point typesdecimal32,decimal64, anddecimal128. As well,<float.h>is extended to define the convenience typedefs_Decimal32,_Decimal64, and_Decimal128for compatibility with the C programming language.
3. Change the heading of subclause 3.4.1, "Header <cdecfloat> synopsis" to "Additions to header <cfloat> synopsis."
4. Change the heading of subclause 3.4.2, "Header <decfloat.h> synopsis" to "Additions to header <float.h> synopsis."
5. Change the contents of 3.4.2 as follows:
#include <cdecfloat>
// C-compatibility convenience typedefs:
typedef std::decimal::decimal32 _Decimal32;
typedef std::decimal::decimal64 _Decimal64;
typedef std::decimal::decimal128 _Decimal128;