From: "Linus Björnstam" <linus.bjornstam@veryfast.biz>
To: "Han-Wen Nienhuys" <hanwenn@gmail.com>
Cc: guile-devel@gnu.org
Subject: Re: unhandled constant?
Date: Fri, 31 Jan 2020 21:01:13 +0100 [thread overview]
Message-ID: <07e36ec2-0c0c-4786-9040-ffcb3418e0bb@www.fastmail.com> (raw)
In-Reply-To: <CAOw_e7Z09CYnnc1GeSfQ86HYagD0UV2m_3W0e32p9SvmjWx1mw@mail.gmail.com>
Read the docs. That seems to be a documentation bug. Try fiddling with the arguments to eval when and see if you can make it work.
--
Linus Björnstam
On Fri, 31 Jan 2020, at 20:17, Han-Wen Nienhuys wrote:
> On Fri, Jan 31, 2020 at 7:20 PM Linus Björnstam
> <linus.bjornstam@veryfast.biz> wrote:
> > I don't really understand your question. With defmacro and syntax-case you can run arbitrary code. If you just output code that does module-define! that won't be run until runtime, and thus you cannot depend on the result of that module-define! during expansion. You can however wrap it in an eval-when to solve that issue. That allows you to specify when code gets run. With module-define! I personally find it all a bit icky, but I usually stay as far away from phasing as I can :)
>
> eval-when looks like it might be a solution to the puzzle , but
> honestly, the doc at
>
> https://www.gnu.org/software/guile/manual/html_node/Eval-When.html
>
> has me mystified. When I run the example through guile 2.2 and
> display *compilation-date*,
>
> I get a different answer each time. Shouldn't it be a fixed timestamp
> (of when the compile happened?)
>
> [hanwen@localhost lilypond]$ guile2.2 e.scm
> ;;; note: source file /home/hanwen/vc/lilypond/e.scm
> ;;; newer than compiled
> /home/hanwen/.cache/guile/ccache/2.2-LE-8-3.A/home/hanwen/vc/lilypond/e.scm.go
> ;;; note: auto-compilation is enabled, set GUILE_AUTO_COMPILE=0
> ;;; or pass the --no-auto-compile argument to disable.
> ;;; compiling /home/hanwen/vc/lilypond/e.scm
> ;;; compiled
> /home/hanwen/.cache/guile/ccache/2.2-LE-8-3.A/home/hanwen/vc/lilypond/e.scm.go
> Fri Jan 31 20:15:57+0100 2020
> [hanwen@localhost lilypond]$ guile2.2 e.scm
> Fri Jan 31 20:15:58+0100 2020
> [hanwen@localhost lilypond]$ guile2.2 e.scm
> Fri Jan 31 20:16:00+0100 2020
>
> --
> Han-Wen Nienhuys - hanwenn@gmail.com - http://www.xs4all.nl/~hanwen
>
next prev parent reply other threads:[~2020-01-31 20:01 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-28 23:08 unhandled constant? Han-Wen Nienhuys
2020-01-29 15:06 ` Ricardo Wurmus
2020-01-30 8:05 ` Han-Wen Nienhuys
2020-01-31 10:49 ` Han-Wen Nienhuys
2020-01-31 11:17 ` Ricardo Wurmus
2020-02-02 19:30 ` Jan Nieuwenhuizen
2020-01-31 14:57 ` Linus Björnstam
2020-01-31 15:16 ` Han-Wen Nienhuys
2020-01-31 17:50 ` Han-Wen Nienhuys
2020-01-31 18:19 ` Linus Björnstam
2020-01-31 19:17 ` Han-Wen Nienhuys
2020-01-31 19:52 ` Linus Björnstam
2020-01-31 20:01 ` Linus Björnstam [this message]
2020-02-01 9:54 ` Han-Wen Nienhuys
2020-02-01 9:56 ` Han-Wen Nienhuys
2020-02-01 10:10 ` David Kastrup
2020-02-01 11:23 ` Han-Wen Nienhuys
2020-02-01 11:36 ` David Kastrup
2020-02-01 13:12 ` Linus Björnstam
2020-02-01 11:09 ` David Kastrup
2020-02-01 13:16 ` Linus Björnstam
2020-02-01 14:23 ` David Kastrup
2020-02-01 15:21 ` Linus Björnstam
2020-02-01 21:55 ` Taylan Kammer
2020-02-01 21:58 ` Fwd: " Taylan Kammer
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