Maxim Cournoyer <maxim.cournoyer@HIDDEN>
to control <at> debbugs.gnu.org.
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From: Maxim Cournoyer <maxim.cournoyer@HIDDEN>
To: Zhu Zihao <all_but_last@HIDDEN>
Subject: Re: bug#65363: Missing support for (library ...) match condition in
'cond-expand'
In-Reply-To: <86pm3ky4lk.fsf@HIDDEN> (Zhu Zihao's message of "Fri, 18 Aug
2023 19:18:16 +0800")
References: <86pm3ky4lk.fsf@HIDDEN>
Date: Mon, 27 Nov 2023 22:53:06 -0500
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Hi,
Zhu Zihao <all_but_last@HIDDEN> writes:
> In R7RS, page 14, section 4.2.1 Conditionals. The form 'cond-expand' can
> accept following conditions
>
> ```
> A <feature requirement> takes one of the following forms:
>
> - <feature identifier>
> - (library <library name>)
> - (and <feature requirement> ...)
> - (or <feature requirement> ...)
> - (not <feature requirement>)
> ```
>
> The form (library <library name>) is used to test whether a R7RS library
> named <library name> exists or not. For example:
>
> ```
> (cond-expand
> ((library (srfi srfi-1))
> (display "Yes, we have SRFI-1.\n")))
> ```
>
> However, this form is currently not supported by Guile. Supporting this
> form can help Guile use portable R7RS library more smoothly.
I'm not sure what doesn't work with the above example; it should work
when used within a define-library, per this 2020 commit:
--8<---------------cut here---------------start------------->8---
commit fd2ffc649c2d08639c2ac41c25e4ebdbeb4b151d
Date: Sun Jan 12 20:14:30 2020 +0100
Support R7RS define-library
--8<---------------cut here---------------end--------------->8---
I've found it had a few omissions, which I've corrected locally, such as
not handling 'else' clauses or (srfi N) names, but your example should
have worked, AFAIK.
If trying 'cond-expand' from the REPL, you'll want to ,use (scheme base)
to get the newer cond-expand definition shadow the SRFI 0 one that is
defined in (guile).
--
Thanks,
Maxim
bug-guile@HIDDEN:bug#65363; Package guile.
Full text available.Received: (at submit) by debbugs.gnu.org; 18 Aug 2023 11:26:25 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Fri Aug 18 07:26:25 2023 Received: from localhost ([127.0.0.1]:46188 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1qWxcX-0000Ih-9o for submit <at> debbugs.gnu.org; Fri, 18 Aug 2023 07:26:25 -0400 Received: from lists.gnu.org ([2001:470:142::17]:54382) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <all_but_last@HIDDEN>) id 1qWxcU-0000IT-Gn for submit <at> debbugs.gnu.org; Fri, 18 Aug 2023 07:26:24 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from <all_but_last@HIDDEN>) id 1qWxcO-0005L8-Cm for bug-guile@HIDDEN; Fri, 18 Aug 2023 07:26:16 -0400 Received: from m12.mail.163.com ([220.181.12.215]) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from <all_but_last@HIDDEN>) id 1qWxcK-0003uR-6A for bug-guile@HIDDEN; Fri, 18 Aug 2023 07:26:16 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:Subject:Date:Message-ID:MIME-Version: Content-Type; bh=jxqgwZmSazAq0KvB0P89QlpeZJDmaQTDbJ49ZZelTg4=; b=LuhIyeqdH2LTRruYevdfJu++QXS1WarXpti7gNXfR1ER4ryoo34w54EO5O47kV bs1rIF0fr/1QU6Prsho1dbkc+Ay63d9pKlCuUQ3cV7Gz6FvbSptG5xmot9Hi1xn3 W7Vhcd1Onkn652DyaR3H/vEXN0HPzvsmKdL47gU+7HudQ= Received: from asus-laptop (unknown [119.123.67.67]) by zwqz-smtp-mta-g0-1 (Coremail) with SMTP id _____wCXv89IVd9kxzW1DQ--.40031S2; Fri, 18 Aug 2023 19:26:01 +0800 (CST) User-agent: mu4e 1.10.5; emacs 30.0.50 From: Zhu Zihao <all_but_last@HIDDEN> To: bug-guile@HIDDEN Subject: Missing support for (library ...) match condition in 'cond-expand' Date: Fri, 18 Aug 2023 19:18:16 +0800 Message-ID: <86pm3ky4lk.fsf@HIDDEN> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="=-=-="; micalg=pgp-sha256; protocol="application/pgp-signature" X-CM-TRANSID: _____wCXv89IVd9kxzW1DQ--.40031S2 X-Coremail-Antispam: 1Uf129KBjvdXoW7XFW8urWDAw1xCFy7Xr13Jwb_yoW3WFX_Gr WkJwsrJF18ZrW2vry5K3yI9ayxX39F9Fy5JrW0gr1Yv34rJa1fGrZFyrsYgwnFyayrX34q 93Z5K343tw1akjkaLaAFLSUrUUUUUb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUvcSsGvfC2KfnxnUUI43ZEXa7IUUVTYUUUUUU== X-Originating-IP: [119.123.67.67] X-CM-SenderInfo: pdoosuxxwbztlvw6il2tof0z/xtbBoQrPr2I0Z05m3AAAsO Received-SPF: pass client-ip=220.181.12.215; envelope-from=all_but_last@HIDDEN; helo=m12.mail.163.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_BL=0.001, RCVD_IN_MSPIKE_L4=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-Spam-Score: 0.9 (/) X-Debbugs-Envelope-To: submit X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -0.1 (/) --=-=-= Content-Type: text/plain In R7RS, page 14, section 4.2.1 Conditionals. The form 'cond-expand' can accept following conditions ``` A <feature requirement> takes one of the following forms: - <feature identifier> - (library <library name>) - (and <feature requirement> ...) - (or <feature requirement> ...) - (not <feature requirement>) ``` The form (library <library name>) is used to test whether a R7RS library named <library name> exists or not. For example: ``` (cond-expand ((library (srfi srfi-1)) (display "Yes, we have SRFI-1.\n"))) ``` However, this form is currently not supported by Guile. Supporting this form can help Guile use portable R7RS library more smoothly. -- Retrieve my PGP public key: gpg --recv-keys B3EBC086AB0EBC0F45E0B4D433DB374BCEE4D9DC Zihao --=-=-= Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iIsEARYIADMWIQT4UAIrVkIEZilSHr2K2nJqP6LM8gUCZN9VOBUcYWxsX2J1dF9s YXN0QDE2My5jb20ACgkQitpyaj+izPLw+QD/d7pTeyqg22FSu6LGkOikxVIlMkpm T0fxkGmNKy0igjkBAJ2siplfRiGUlN+Y0A259rcgXhLiQEKpSOYPuwRkDmcL =O5vk -----END PGP SIGNATURE----- --=-=-=--
Zhu Zihao <all_but_last@HIDDEN>:bug-guile@HIDDEN.
Full text available.bug-guile@HIDDEN:bug#65363; Package guile.
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