[bug#50614] [PATCH] build: utils: Add ‘list-when’ macro.

[Maxime Devos]

Liliana Marie Prikler schreef op vr 17-09-2021 om 19:55 [+0200]:
> Am Freitag, den 17.09.2021, 10:26 +0200 schrieb Xinglu Chen:
> > * guix/build/utils.scm (list-when): New syntax
> > * tests/build-utils.scm ("list-when: expr1 is non-#f", list-when:
> > expr1 is #f"):
> >   Test it.
> > * guix.texi (Build Utilities): Document it.
> > ---
> > Changes since v1:
> > 
> > * Rename ‘optional’ to ‘list-when’.
> > 
> > * Make
> > 
> >     (list-when test consequent ...)
> > 
> >   equivalent to
> > 
> >     (if tests
> >         (list consequent ...)
> >         '())
> LGTM, but let's wait on more opinions.

It looks nice to me, though you might want an opinion from someone who
is new to Scheme.

Greetings,
Maxime.

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