Re: Using #true and #false everywhere?

[zimoun]

Dear,

On Sun, 18 Oct 2020 at 03:36, Maxim Cournoyer <maxim.cournoyer@gmail.com> wrote:
> Tobias Geerinckx-Rice <me@tobias.gr> writes:
> > Maxim Cournoyer 写道：

> >> I'd only agree to such a change if it's already been standardized in
> >> the
> >> RnRS as such
> >
> > Sure, I think that's implied.  #true and #false are part of the
> > R7RS-small standard.
>
> Thanks, I couldn't find where that was defined.  Now that you've pointed
> it to me, it's defined in section 6.3 Booleans:
>
>    The standard boolean objects for true and false are written as #t and
>    #f. Alternatively, they can be written #true and #false,
>    respectively.
>
> > I don't know what Guile ‘is’, but it supports that part of the
> > standard.  I don't think it implements any of the RnRS completely?
> > I've heard it said that Guile targets R5RS, but that was ages ago.
>
> info '(guile) Guile and Scheme' suggests it supports all of the R5RS,
> R6RS or R7RS standards, plus a bunch of srfi modules.
>
> With this cleared, I don't have an objection to the proposal, other than
> the other points I've mentioned earlier (to recall those points: I don't
> perceive much value in it and it'll make the 'git blame' output noisy).

I do not have a strong opinion but I am still perplex if it really
simplifies because all the material around about Scheme and especially
the Guile manual still uses #t/#f and not #true/#false.  For example,

--8<---------------cut here---------------start------------->8---
$ guix repl
GNU Guile 3.0.4
Copyright (C) 1995-2020 Free Software Foundation, Inc.

Guile comes with ABSOLUTELY NO WARRANTY; for details type `,show w'.
This program is free software, and you are welcome to redistribute it
under certain conditions; type `,show c' for details.

Enter `,help' for help.
scheme@(guix-user)> ,use(gnu packages base)
scheme@(guix-user)> (eq? hello coreutils)
$1 = #f
--8<---------------cut here---------------end--------------->8---

Is it possible to display #false instead?  If not, I am not convinced
it is really easier to read #true/#false in the Guix code, then #t/#f
in the REPL or Guile documentation.

My bikeshedding time is over. :-)

All the best,
simon