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| 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 displaying information | > 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 a NaN | should produce that representation, since it would still be allowed | to signal an error. (And then, once it is signalled, it could | print *anything it wants*.) | | Moreover, nothing prevents the mandated written representation from | 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>