Re: procedure to check equality of list-elements

[Thomas Morley]

Am So., 6. Nov. 2022 um 13:39 Uhr schrieb Jean Abou Samra <jean@abou-samra.fr>:
>
>
>
> Le 06/11/2022 à 13:27, Thomas Morley a écrit :
> > Ofcourse not, though you need to know that the chosen proc is suitable
> > for the task.
> > For me eqv? was always meant to work with exactly two values, like cons.
> > But (apply cons '(1 2 3)) fails ofcourse.
> >
> > In the past I searched the guile-manual and our own lilbrary to get a
> > procedure testing equality of list-elements. To no avail. So I ended
> > up defining some custom-recursion...
> > Having a named (and documented) procedure would probably have helped.
>
>
> To me that sounds more like you should submit a doc patch to Guile
> so that the Guile doc doesn't say eqv? et al. apply to two elements
> only.
>
>
Currently the only hint one can get is: doing in a guile-prompt:

scheme@(guile-user)> +
$1 = #<procedure + (#:optional _ _ . _)>
scheme@(guile-user)> eq?
$2 = #<procedure eq? (#:optional _ _ . _)>
scheme@(guile-user)>

Now one could imagine eq? could be used on more than two values, like +.
Though, I'd say one need to know it already, before one gets the idea
to enter it in a prompt...

Thanks,
  Harm