Joe Marshall <j...@ccs.neu.edu> writes:
> You're missing the point.  Suppose Erann and I were working on some
> project and he had written the above macro.  I don't have to know
> the details of implementation (I'm assuming that I can trust Erann
> not to write bogus code).  Using the macro is *far* preferable to
> something like:

>      (start-reactor)
>      (when (< minval (reactor-temp) maxval)
>         (scram))
>      (while (true)
>         (operate-reactor-step))
>         (when (< minval (reactor-temp) maxval)
>            (scram))
>      (shutdown-reactor)

> Especially because there is a non-obvious bug in the above code.