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*To*: Thomas Bushnell BSG <tb@xxxxxxxxxx>*Subject*: Re: arithmetic issues*From*: Bradley Lucier <lucier@xxxxxxxxxxxxxxx>*Date*: Sun, 23 Oct 2005 14:45:49 -0500*Cc*: Bradley Lucier <lucier@xxxxxxxxxxxxxxx>, Aubrey Jaffer <agj@xxxxxxxxxxxx>, bear@xxxxxxxxx, jcowan@xxxxxxxxxxxxxxxxx, srfi-77@xxxxxxxxxxxxxxxxx*Delivered-to*: srfi-77@xxxxxxxxxxxxxxxxx*In-reply-to*: <871x2cowe8.fsf@xxxxxxxxxxxxxxxxx>*References*: <20051021145326.816C11B77BB@xxxxxxxxxxxxxxxxxxxxx> <20051021155906.GC16464@NYCMJCOWA2> <Pine.LNX.4.58.0510210910130.18969@xxxxxxxxxxxxxx> <20051022011713.1F22A1B77BB@xxxxxxxxxxxxxxxxxxxxx> <87vezqmjkq.fsf@xxxxxxxxxxxxxxxxx> <20051022232548.5A2971B77BB@xxxxxxxxxxxxxxxxxxxxx> <873bmtxdnm.fsf@xxxxxxxxxxxxxxxxx> <20051023181854.4E7DD1B77BB@xxxxxxxxxxxxxxxxxxxxx> <871x2cowe8.fsf@xxxxxxxxxxxxxxxxx>

On Oct 23, 2005, at 2:39 PM, Thomas Bushnell BSG wrote:

Aubrey Jaffer <agj@xxxxxxxxxxxx> writes:| From: Thomas Bushnell BSG <tb@xxxxxxxxxx> | Date: Sat, 22 Oct 2005 17:47:25 -0700 | | Aubrey Jaffer <agj@xxxxxxxxxxxx> writes: | > ...| > That still prevents an implementation from displayinginformation| > about what type of NaN was returned. Such information could be | > helpful to find the call which generated the NaN. | | Huh? How does it prevent such? We *could* mandate a readable| written representation for NaNs without manding that printing aNaN| should produce that representation, since it would still beallowed| to signal an error. (And then, once it is signalled, it could | print *anything it wants*.) || Moreover, nothing prevents the mandated written representationfrom| optionally including implementation defined contents, if that | should be useful. When different NaNs are returned depending on the circumstances creating them, I would like my implementation to display them like this: #<not-a-number expt>Sure, that seems fine. We could mandate that as the readable written representation!

Brad (who doesn't really want to get into this, ...)

**Follow-Ups**:**Re: arithmetic issues***From:*Aubrey Jaffer

**References**:**arithmetic issues***From:*Aubrey Jaffer

**Re: arithmetic issues***From:*John.Cowan

**Re: arithmetic issues***From:*bear

**Re: arithmetic issues***From:*Aubrey Jaffer

**Re: arithmetic issues***From:*Thomas Bushnell BSG

**Re: arithmetic issues***From:*Aubrey Jaffer

**Re: arithmetic issues***From:*Thomas Bushnell BSG

**Re: arithmetic issues***From:*Aubrey Jaffer

**Re: arithmetic issues***From:*Thomas Bushnell BSG

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