From: Per Bothner <per@bothner.com>
To: kawa@sourceware.org
Subject: Re: Reader handling of the @ character
Date: Mon, 29 Jun 2020 07:05:12 -0700 [thread overview]
Message-ID: <ce65797d-157b-f0c3-61ba-544d9873b728@bothner.com> (raw)
In-Reply-To: <2def4fdf-cc77-3df6-b91c-2e7b4431b841@bothner.com>
On 6/28/20 8:04 PM, Per Bothner wrote:
> This seems to work:
>
> (define-syntax test
> (syntax-rules (|@|)
> ((test @ x y z) (list x y z))))
>
> The --r7rs flag also works.
>
In private email I was asked about |@| and --r7rs.
The slice operator
@expression
is converted by the Kawa reader into:
($splice$ expression)
The vertical bars in |@| makes @ into a regular
symbol and disables the special treatment of the @ character.
The --r7rs command-line flag disables Kawa extensions that
conflict with strict R7RS compatibility:
https://www.gnu.org/software/kawa/Options.html#Options-for-language-selection
--
--Per Bothner
per@bothner.com http://per.bothner.com/
next prev parent reply other threads:[~2020-06-29 14:05 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-29 1:44 Duncan Mak
2020-06-29 3:04 ` Per Bothner
2020-06-29 14:05 ` Per Bothner [this message]
2020-06-29 22:52 ` Damien MATTEI
2020-06-29 22:56 ` Per Bothner
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