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From: Damien Mattei <damien.mattei@gmail.com>
To: Per Bothner <per@bothner.com>
Cc: phiroc@free.fr, kawa@sourceware.org
Subject: Re: define-syntax can only be used with local variables
Date: Tue, 14 Sep 2021 19:38:14 +0200	[thread overview]
Message-ID: <CADEOadfg17GK7-pi_oc5s46BVdYpM0U2+8=+u5do=E0YTuNS3Q@mail.gmail.com> (raw)
In-Reply-To: <515e7486-9636-e698-b811-9574bf0bedc3@bothner.com>

downloading a binary version ok kawa from the official web site , i get the
same error, with the same openjdk 16:
mattei@macbook-pro-touch-bar bin % export
JAVA_HOME=/opt/homebrew/Cellar/openjdk/16.0.2
/opt/homebrew/Cellar/openjdk/16.0.2
mattei@macbook-pro-touch-bar bin % pwd

/Users/mattei/kawa-3.1.1/bin
mattei@macbook-pro-touch-bar bin % ./kawa


#|kawa:1|# (define-syntax nil2!
#|.....2|#      (syntax-rules ()
#|.....3|#          ((_ x)
#|.....4|#              (set! x '(0)))))
#|.....5|# (define y '(1))
#|kawa:6|# (nil2! y)
#|kawa:7|# y
(1)

i will try the source version perhaps

damien

On Tue, Sep 14, 2021 at 7:27 PM Per Bothner <per@bothner.com> wrote:

>
>
> On 9/10/21 12:33 AM, phiroc--- via Kawa wrote:
> > Hello,
> > in the below code, nil! and nil2! only set variables values to '() and
> '(0) when such variables are local (let).
>
> I'm guessing (without having tested it) that the restriction isn't local
> variables
> but lexical vs dynamic variables.  I.e. it is likely that module-level
> (library-level)
> variables would also work.
>
> Probably a problem with macro hygiene.  Though it's weird that it behaves
> differently on
> different systems.  Possibly different Java versionor different Kawa
> versions (though
> I don't recall changing anything in this area in a while).
>
> Could be a nice exercise to figure out for someone who
> wants to understand how Kawa macro hygiene works.
> --
>         --Per Bothner
> per@bothner.com   http://per.bothner.com/
>

  reply	other threads:[~2021-09-14 17:38 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <971550055.197381511.1631259004148.JavaMail.root@zimbra65-e11.priv.proxad.net>
2021-09-10  7:33 ` phiroc
2021-09-14 12:42   ` Damien Mattei
2021-09-14 16:14     ` Philippe de Rochambeau
2021-09-14 16:34       ` Damien Mattei
2021-09-14 16:58         ` Philippe de Rochambeau
2021-09-14 17:26   ` Per Bothner
2021-09-14 17:38     ` Damien Mattei [this message]
2021-09-14 17:58     ` Damien Mattei
2021-09-14 18:00       ` Damien Mattei
2021-09-14 18:07         ` Per Bothner
2021-09-14 18:38           ` Damien Mattei
2021-09-14 19:30             ` Per Bothner
2021-09-15  7:10               ` phiroc
2021-09-16 10:02                 ` phiroc
2021-09-16 10:41                   ` Damien MATTEI
2021-09-16 11:05                     ` phiroc
2021-09-16 13:44                       ` Damien MATTEI
2021-09-17  5:29                       ` Per Bothner
2021-09-17  7:00                         ` phiroc
2021-09-17 10:48                           ` Per Bothner
2021-09-16 21:11                   ` Per Bothner

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