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[Gcl-devel] Re: printing IEEE 754 special values (inf, nan)

From: Paul F. Dietz
Subject: [Gcl-devel] Re: printing IEEE 754 special values (inf, nan)
Date: Thu, 07 Jul 2005 04:54:06 -0500
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.8) Gecko/20050511

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

The form printed when *PRINT-READABLY* is true need not be
the same as that printed when it is false.


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