Re: Predicate for true lists

[Eli Zaretskii]

> Date: Fri, 6 Jul 2018 11:00:43 -0700 (PDT)
> From: Drew Adams <address@hidden>
> Cc: address@hidden, address@hidden, address@hidden
> 
> > > IIRC, the main motivation for adding this function was
> > > to provide a predicate for testing properness.
> > 
> > Then I'd prefer calling the function proper-list-p (and returning the
> > list length when it's a proper list) than the other way around.
> 
> Then discoverability of the use for length is reduced.

Not if we state in the doc string that the value returned for proper
lists is the list length.