On Fri, Apr 19, 2019 at 10:16 AM Lassi Kortela <xxxxxx@lassi.io> wrote:

I think it would make sense if the printer used underscores too. But
that should probably opt-in rather than opt-out, so that existing
programs print using standard Scheme syntax by default. What do you
think?

Yes, for easy interchange between Schemes with and without _.

Similarly, R7RS systems are allowed to accept #true and #false

as alternatives, but essentially all of them still print #t and #f.

BTW what's the usual way to give settings to the printer in
Scheme - is it done using 'parameterize'?

No, there are no settings (except for the three entry points

write, write-simple, and write-shared in R7RS). In SRFI 159,

which is already part of R7RS-large, there is a formatter that

can insert any chosen character every N digits. The forthcoming

SRFI 166 is meant to be a replacement and will be voted on

in a future R7RS ballot: it adds the ability to insert characters

in variable places, as required in India.

John Cowan http://vrici.lojban.org/~cowan xxxxxx@ccil.org

But no living man am I! You look upon a woman. Eowyn I am, Eomund's daughter.

You stand between me and my lord and kin. Begone, if you be not deathless.

For living or dark undead, I will smite you if you touch him.