Robert Dodier wrote:
Well, I'm not sure that anyone actually expects the
input string "NaN" to read the same as the floating point
object of which it is a representation.
One property that is important: if *PRINT-READABLY* is true,
then either NaN should print in a readable form (that is,
in a form that, when read back in with the other reader/printer
variables bound to the same values, produces a 'similar' value,
similarity meaning = on numbers), or it should signal
a PRINT-NOT-READABLE error.
The form printed when *PRINT-READABLY* is true need not be
the same as that printed when it is false.
Paul
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