Re: reader macros for hidden packages
Hi, jgart skribis: > Out of curiosity, is it possible to make reader macros like this with guile? > > ``` > @hidden > (define-public python-httplib2 As Maxime notes, ‘read-hash-extend’ is the only reader extension mechanism, and it only supports hash-prefixed extensions. That said, I very much recommend against reader extensions because they don’t compose (the extension is installed globally), they are not namespaced, etc. I find it OK in very narrow cases, such as gexps, but I wouldn’t use them anywhere else. The good thing is that we can often achieve concise syntax with sexps as well, like: (define-public python-httplib2 (hidden-package (package …))) HTH! Ludo’.
Re: reader macros for hidden packages
On Sun, 26 Jun 2022 16:55:26 +0200 Maxime Devos wrote: > jgart schreef op zo 26-06-2022 om 09:43 [-0500]: > > > Or a new 'define-public-hidden': > > > > > > (define-public-hidden python-httplib2 > > > (package > > > (name "...") > > > ...)) > > > > I like this idea. You'd implement that as a macro that inserts > > hidden-package for the user of define-public-hidden? > > Yep. Cool. I'll try to write that macro and share it later if I get around to it. I'm more comfortable currently with define-macro that with define-syntax-rule :(
Re: reader macros for hidden packages
jgart schreef op zo 26-06-2022 om 09:43 [-0500]: > > Or a new 'define-public-hidden': > > > > (define-public-hidden python-httplib2 > > (package > > (name "...") > > ...)) > > I like this idea. You'd implement that as a macro that inserts > hidden-package for the user of define-public-hidden? Yep. signature.asc Description: This is a digitally signed message part
Re: reader macros for hidden packages
On Sun, 26 Jun 2022 09:27:15 +0200 Maxime Devos wrote: > 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. I've tried reading that code. Looking to get back to it again soon. gexps are still somewhat fuzzy for me. Atleast at the implementationn level. > Also, @hidden does not start with #, I was inspired by this common lisp code using cl-syntax-annot: https://github.com/fukamachi/ningle/blob/a9052827757c54a83c9648175c11530e79295513/context.lisp#L8 >so you can't extend the read > syntax that wat with read-hash-extend. (I suppose you could go #hidden > instead). Does read-hash-extend allow for more than a single character after the hash # symbol? >From reading the docs it looked like not... I'll spend some more repl time >with it. Just for the sake of hacking. I'm finding excuses to write guile that I wouldn't normally write and to explore hacking on guix APIs to see what I can mold them too. Take this exploration with goops and guix for example: https://github.com/drewc/druix/blob/ad1c15bd6e20375b83ce398416d0f16de0385ab5/druix/versions.scm#L33 > > Or a new 'define-public-hidden': > > (define-public-hidden python-httplib2 > (package > (name "...") > ...)) I like this idea. You'd implement that as a macro that inserts hidden-package for the user of define-public-hidden? > or move the relevant packages upstream? Yup, that's the next step. Was just trying to find a way to suppress warnings until I have time to upstream the relevant packages and to hack me some guile for fun. 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). Thanks for all the advice. It's much appreciated! all best, jgart
Re: reader macros for hidden packages
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. signature.asc Description: This is a digitally signed message part
