[racket] numbers/bytes in r6rs

From: Vincent St-Amour (stamourv at ccs.neu.edu)
Date: Sun Dec 26 15:47:11 EST 2010

At Sun, 26 Dec 2010 10:49:45 -0600,
Matthew Flatt wrote:
> > - determining whether a floating point number is a double or a single.
> I don't think there's any predicate for that.

flonum? returns true for double-precision floats, and
(lambda (x) (and (inexact-real? x) (not (flonum? x))))
returns true for single-precision floats (if Racket was compiled with
single-precision float support).


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