From ...
From: Erik Naggum <erik@naggum.no>
Subject: Re: String to real
Date: 2000/06/09
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* Howard Ding <hading@worldnet.att.net>
| Anyway, there appears to be a Lisp implementation of parse-float at
| the CMU repository:

  Since the correctness of parsing floating point numbers depends
  heavily on other parts of the implementation, I consider using a
  third-party float-parser very, very risky.  It's safer to use a
  foreign function call to C than to assume you have sufficient
  control over the representation in Common Lisp to piece together a
  floating point number.  And remember print-read consistency!

#:Erik
-- 
  If this is not what you expected, please alter your expectations.