# [plt-scheme] Numeric Comparison Contracts

Thanks. That's fixed now (in SVN).
Robby
On Wed, Oct 28, 2009 at 10:44 AM, Doug Williams
<m.douglas.williams at gmail.com> wrote:
>* I have a question about numeric comparisons (inequality operators) in
*>* contracts.I'm not sure if it's a documentation bug or an implementation bug,
*>* but </c specifies a real? argument, while >/c, <=/c, and >=/c (and between/c
*>* and possibly others) specifies a number? argument. Unfortunately, they
*>* actually error (as opposed to giving a contract violation) when given a
*>* complex number. [The actual inequality operators require real numbers.] So,
*>* you actually need to write (and/c real? (<=/c 0.0)), for example, to guard
*>* the <=/c contract. It seems that the inequality operators should require
*>* (and enforce) a real number as its argument.
*>*
*>* Doug
*>*
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