[Cfp-interest] precision modifier

[Jim Thomas]

How about the following revision to the proposed text for 7.21.6.1 paragraph 8:

…

If the precision is present (in the conversion specification) and at least as large as the precision p (5.2.4.2.2) of the decimal floating type, the conversion is as if the precision were missing. If the precision is present and less than the precision p of the decimal floating type, the conversion first rounds the input, in the type, according to the current rounding direction for decimal floating-point operations, to the number of digits specified by the precision, then converts the result as if the precision were missing.


…

To illustrate the effects of a precision specification, the sequence:

...

-Jim

On Aug 27, 2012, at 4:58 PM, Jim Thomas wrote:

> 
> On Aug 27, 2012, at 8:48 AM, Fred J. Tydeman wrote:
> 
>> C11 has in 7.21.6.` The fprintf function,
>> "length modifier" and "precision", but no "precision modifier".
>> 
>> The DFP document has "precision modifier".  To match C11, I
>> believe that should be changed to just "precision".
> 
> I agree that "precision modifier" should be changed. It came from the decimal FP TR, where it was used to distinguish the precision in the conversion specification from the precision of the decimal floating type - both "precisions" appear in the same sentences. I'll try "precision specification" (which does appear in C11) or "precision in the conversion specification" or "conversion-specification precision" or some such.
> 
> -Jim
> 
>> 
>> ---
>> Fred J. Tydeman        Tydeman Consulting
>> tydeman at tybor.com      Testing, numerics, programming
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