From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: G expressions
Date: Mon, 28 Apr 2014 17:58:58 +0200
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	(Amirouche Boubekki's message of "Mon, 28 Apr 2014 16:03:50 +0200")
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To: Amirouche Boubekki <amirouche.boubekki@gmail.com>
Cc: guix-devel@gnu.org

Amirouche Boubekki <amirouche.boubekki@gmail.com> skribis:

> # There=E2=80=99s a recurrent problem that we need to communicate the fil=
e name of
> # store items to Scheme code that is going to live in another process:
> # expressions to build a derivation, Scheme files that are to be loaded by
> # other processes, etc.
>
> This seems to be a referential transparency problem. Probably the
> Funarg problem.
>
> Quoting http://en.wikipedia.org/wiki/Funarg_problem:

Hmm I don=E2=80=99t think this has anything to do with it.

> What about the following:
>
> ;;  (quote (system* (string-append (coreutils "/bin/ls"))))
>
> I don't understand the difference with classic macro.

Perhaps I didn=E2=80=99t make myself clear.  There are two problems to solve
here: first =E2=80=9Ccoreutils=E2=80=9D must be replaced by =E2=80=9C/gnu/s=
tore/...=E2=80=9D when that
expression is written to disk, and second we=E2=80=99d like the quoted
expression to hold information about the fact that it refers to the
=E2=80=98coreutils=E2=80=99 package.  Quasiquote doesn=E2=80=99t help with =
that.

Does that clarify things?

Ludo=E2=80=99.