Re: [Sbcl-devel] What is the valid return value of (expt 0.0 0) and (expt 0 0.0)?

[Tobias C. R. <tc...@fr...>]

Roman Marynchak <rom...@gm...> writes:

> In the initial patch I signal SB-KERNEL::ARGUMENTS-OUT-OF-VALID-DOMAIN, this
> condition is derived from ARITHMETIC-ERROR. This is similar to Lispworks
> behavior. CLISP signals DIVIZION-BY-ZERO, which is a bit confusing. Is that
> possible to derive from ARITHMETIC-ERROR and REFERENCE-ERROR at the same
> time?

Conditions support multiple inheritance like classes, so:

(define-condition arithmetic-reference-error 
     (arithmetic-error reference-condition)
 ())

  -T.