* Re: Meaning of symbol prefixed with "#$"
[not found] <CAEavL=UnjHtxpWmjE0sxMFV7QFYoRdNdov6=N-sfUKxfbeX3bg@mail.gmail.com>
@ 2023-05-26 19:14 ` Ricardo Wurmus
2023-05-27 23:31 ` N. Y.
0 siblings, 1 reply; 4+ messages in thread
From: Ricardo Wurmus @ 2023-05-26 19:14 UTC (permalink / raw)
To: N. Y.; +Cc: help-guix
(Moving this to help-guix instead of guile-user.)
"N. Y." <ningyuan.sg@gmail.com> writes:
> (arguments
> '(#:phases (modify-phases %standard-phases
> (add-after 'unpack 'amend-version
> (lambda _
> (substitute* "setup.py"
> (("versioneer.get_version\\(\\)")
> (string-append "\"" #$version "\"")))))
You can only use #$ inside an expression starting with #~. This should
work:
--8<---------------cut here---------------start------------->8---
(arguments
(list
#:phases
#~(modify-phases %standard-phases
(add-after 'unpack 'amend-version
(lambda _
(substitute* "setup.py"
(("versioneer.get_version\\(\\)")
(string-append "\"" #$version "\""))))))))
--8<---------------cut here---------------end--------------->8---
--
Ricardo
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: Meaning of symbol prefixed with "#$"
2023-05-26 19:14 ` Meaning of symbol prefixed with "#$" Ricardo Wurmus
@ 2023-05-27 23:31 ` N. Y.
2023-05-28 7:28 ` Ricardo Wurmus
0 siblings, 1 reply; 4+ messages in thread
From: N. Y. @ 2023-05-27 23:31 UTC (permalink / raw)
To: Ricardo Wurmus; +Cc: help-guix
Thanks so much for your suggestion! Can I ask for a name for these
notations, #~ and #$? I would like to learn more about them, but they are
difficult to Google for.
On Fri, May 26, 2023 at 7:17 PM Ricardo Wurmus <rekado@elephly.net> wrote:
>
> (Moving this to help-guix instead of guile-user.)
>
> "N. Y." <ningyuan.sg@gmail.com> writes:
>
> > (arguments
> > '(#:phases (modify-phases %standard-phases
> > (add-after 'unpack 'amend-version
> > (lambda _
> > (substitute* "setup.py"
> > (("versioneer.get_version\\(\\)")
> > (string-append "\"" #$version "\"")))))
>
> You can only use #$ inside an expression starting with #~. This should
> work:
>
> --8<---------------cut here---------------start------------->8---
> (arguments
> (list
> #:phases
> #~(modify-phases %standard-phases
> (add-after 'unpack 'amend-version
> (lambda _
> (substitute* "setup.py"
> (("versioneer.get_version\\(\\)")
> (string-append "\"" #$version "\""))))))))
> --8<---------------cut here---------------end--------------->8---
>
> --
> Ricardo
>
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: Meaning of symbol prefixed with "#$"
2023-05-27 23:31 ` N. Y.
@ 2023-05-28 7:28 ` Ricardo Wurmus
2023-05-29 8:40 ` N. Y.
0 siblings, 1 reply; 4+ messages in thread
From: Ricardo Wurmus @ 2023-05-28 7:28 UTC (permalink / raw)
To: N. Y.; +Cc: help-guix
Hi,
> Thanks so much for your suggestion! Can I ask for a name for these
> notations, #~ and #$? I would like to learn more about them, but they
> are difficult to Google for.
These are syntax for “gexp” and “ungexp”. The Guix manual explains them
in great detail in the section 9.12 G-Expressions.
If you need more detail you can find it here:
https://inria.hal.science/hal-01580582/en
--
Ricardo
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Meaning of symbol prefixed with "#$"
2023-05-28 7:28 ` Ricardo Wurmus
@ 2023-05-29 8:40 ` N. Y.
0 siblings, 0 replies; 4+ messages in thread
From: N. Y. @ 2023-05-29 8:40 UTC (permalink / raw)
To: Ricardo Wurmus; +Cc: help-guix
Thanks so much, I'll read up!
On Sun, May 28, 2023 at 7:31 AM Ricardo Wurmus <rekado@elephly.net> wrote:
>
> Hi,
>
> > Thanks so much for your suggestion! Can I ask for a name for these
> > notations, #~ and #$? I would like to learn more about them, but they
> > are difficult to Google for.
>
> These are syntax for “gexp” and “ungexp”. The Guix manual explains them
> in great detail in the section 9.12 G-Expressions.
>
> If you need more detail you can find it here:
> https://inria.hal.science/hal-01580582/en
>
> --
> Ricardo
>
^ permalink raw reply [flat|nested] 4+ messages in thread
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[not found] <CAEavL=UnjHtxpWmjE0sxMFV7QFYoRdNdov6=N-sfUKxfbeX3bg@mail.gmail.com>
2023-05-26 19:14 ` Meaning of symbol prefixed with "#$" Ricardo Wurmus
2023-05-27 23:31 ` N. Y.
2023-05-28 7:28 ` Ricardo Wurmus
2023-05-29 8:40 ` N. Y.
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