From: Maxime Devos <maximedevos@telenet.be>
To: jgart <jgart@dismail.de>, Guix Devel <guix-devel@gnu.org>
Subject: Re: reader macros for hidden packages
Date: Sun, 26 Jun 2022 09:27:15 +0200 [thread overview]
Message-ID: <0f6daaa2146a8b4d0d9718c9e861c6277a7c7aad.camel@telenet.be> (raw)
In-Reply-To: <20220625222700.GC3148@gac>
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jgart schreef op za 25-06-2022 om 22:27 [-0500]:
> Out of curiosity, is it possible to make reader macros like this with guile?
>
> ```
> @hidden
> (define-public python-httplib2
> (package
> (name "python-httplib2")
> [...]
> The above would make the package hidden by using `hidden-package`.
FWIW, read-hash-extend things aren't macros, though that can be worked
around with some cleverness, see (guix gexp) where #~(...) -> (gexp
...) by the read syntax, and 'gexp' is a macro.
Also, @hidden does not start with #, so you can't extend the read
syntax that wat with read-hash-extend. (I suppose you could go #hidden
instead).
However, I cannot recommend this, for read syntax is global (not per
module, like the module system) and there can only be a single read
syntax per first character (so high chance for collisions).
It's also rather magical, and we already have the less magical but no
less concise 'hidden-package', why not:
(define-public python-httplib2
(hidden-package
(name "...")
...))
Or a new 'define-public-hidden':
(define-public-hidden python-httplib2
(package
(name "...")
...))
or move the relevant packages upstream? Also, the module system has a
#:replace, which may be useful to put in the (guixrus packages ...)
modules such that in case a module imports both the guixrus and guix
module, the guixrus wins (not 100% sure if that would works).
Greetings,
Maxime.
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next prev parent reply other threads:[~2022-06-26 7:27 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-26 3:27 reader macros for hidden packages jgart
2022-06-26 7:27 ` Maxime Devos [this message]
2022-06-26 14:43 ` jgart
2022-06-26 14:55 ` Maxime Devos
2022-06-26 20:08 ` jgart
2022-06-27 8:56 ` Ludovic Courtès
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