From unknown Sun Jun 22 22:46:44 2025 X-Loop: help-debbugs@gnu.org Subject: bug#22961: The read function does not support a lambda argument Resent-From: Mihai =?UTF-8?Q?C=C4=83lin?= Bazon Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Wed, 09 Mar 2016 16:28:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: report 22961 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: 22961@debbugs.gnu.org X-Debbugs-Original-To: bug-gnu-emacs@gnu.org Received: via spool by submit@debbugs.gnu.org id=B.14575408316299 (code B ref -1); Wed, 09 Mar 2016 16:28:01 +0000 Received: (at submit) by debbugs.gnu.org; 9 Mar 2016 16:27:11 +0000 Received: from localhost ([127.0.0.1]:41719 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84) (envelope-from ) id 1adgx4-0001dX-UD for submit@debbugs.gnu.org; Wed, 09 Mar 2016 11:27:11 -0500 Received: from eggs.gnu.org ([208.118.235.92]:45587) by debbugs.gnu.org with esmtp (Exim 4.84) (envelope-from ) id 1adZcf-0005J3-Lc for submit@debbugs.gnu.org; Wed, 09 Mar 2016 03:37:37 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1adZcZ-0008EN-N1 for submit@debbugs.gnu.org; Wed, 09 Mar 2016 03:37:32 -0500 X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on eggs.gnu.org X-Spam-Level: X-Spam-Status: No, score=0.8 required=5.0 tests=BAYES_50,FREEMAIL_FROM, HTML_MESSAGE,T_DKIM_INVALID autolearn=disabled version=3.3.2 Received: from lists.gnu.org ([2001:4830:134:3::11]:57137) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1adZcZ-0008E6-JE for submit@debbugs.gnu.org; Wed, 09 Mar 2016 03:37:31 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:36553) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1adZcY-0005et-Kb for bug-gnu-emacs@gnu.org; Wed, 09 Mar 2016 03:37:31 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1adZcX-0008B9-Mm for bug-gnu-emacs@gnu.org; Wed, 09 Mar 2016 03:37:30 -0500 Received: from mail-ig0-x22d.google.com ([2607:f8b0:4001:c05::22d]:35679) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1adZcX-0008AM-Ga for bug-gnu-emacs@gnu.org; Wed, 09 Mar 2016 03:37:29 -0500 Received: by mail-ig0-x22d.google.com with SMTP id vf5so6349993igb.0 for ; Wed, 09 Mar 2016 00:37:29 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to; bh=MO082kqNwovWBU3nbatCmPFKyCfgCr6ezLlsWw6TfOw=; b=zZT+guhzahtFPGHlrEXZSmsO1mCEmuyrGuuYp7YV9SRmjD+nzn5gQeJJq4/j3pUDbu OSgOUCEH2HrQsWjici87US4qp9OJZ7TmZUecuVSiJwJ/8QJryZOOAjZVhgBqR6yvpYaY FXWuN7V7QKMISSla6AsljrDkxbpQrvygOnF13kP3qHnow4jibFDHWho1nE+0TXHqB79l x4btFYPu/j8IIOTRl+1csgGZ7BZbbEphRI9Ruw/BL39q3G93pIAHG0gbwrS3VxxBU/vd tLoK2lRHW+hzdCe3eN9ami+fUiaXBDRYadGYaIuOn1nNp9AxLPYSsc6CJf9GW0ECzNUh lZ6Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=MO082kqNwovWBU3nbatCmPFKyCfgCr6ezLlsWw6TfOw=; b=DIh5c75u3gQgadq10CakXbvH6KyV4hJ99tsJ0RzTRhHh/Lfoge6xsSxm/nvjhm61op XXF4x5QmOxtjDD5jQjcCIcwYjrk7C61fWDpcQYI4UY+7hyKgEBSpumP8U8YvAPtoo9pv 1/iK6ykseqSFd0G4D62Qgw+kuWClmhsrl9Nhc2NHrnRJqPzGBmdaScYka2+XVp5V6gw1 MZi02mIUBl/jolpZ/ggsESlJrM92obDeV+687nalAsC2OccJMt9C7uUNrJUtPaMT7VbH i5tYpIiCCDwxqBja4CW/yqNOuEwF5eh55+ZGOS6P9rcLtR9ae79nqRKkxblR+n11wHOu NSFg== X-Gm-Message-State: AD7BkJKBpO8UrrT7x63IqUKMg7dXYSUcECI96lAvIHeqY7avnpFwtVagVIUXcwax9NtZqRSQIblaG8ZIpNuwuA== MIME-Version: 1.0 X-Received: by 10.50.50.177 with SMTP id d17mr11171395igo.10.1457512648685; Wed, 09 Mar 2016 00:37:28 -0800 (PST) Received: by 10.107.4.72 with HTTP; Wed, 9 Mar 2016 00:37:28 -0800 (PST) Date: Wed, 9 Mar 2016 10:37:28 +0200 Message-ID: From: Mihai =?UTF-8?Q?C=C4=83lin?= Bazon Content-Type: multipart/alternative; boundary=047d7bdca686ae4177052d999b0d X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x X-Received-From: 2001:4830:134:3::11 X-Spam-Score: -4.0 (----) X-Mailman-Approved-At: Wed, 09 Mar 2016 11:27:10 -0500 X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -4.0 (----) --047d7bdca686ae4177052d999b0d Content-Type: text/plain; charset=UTF-8 Example, I eval this in the scratch buffer (with lexical-binding set true): (read (let ((str "TEST") (pos 0) (prev nil)) (lambda (ch) (cond (ch (push ch prev)) (prev (pop prev)) ((< pos (length str)) (prog1 (aref str pos) (setq pos (1+ pos)))))))) According to the docs [1] an input stream can be a function. I would expect the above to return the symbol TEST, but instead I get an error ("end of file during parsing"). [1] http://www.gnu.org/software/emacs/manual/html_node/elisp/Input-Streams.html#Input-Streams -- Mihai Bazon, http://lisperator.net/ --047d7bdca686ae4177052d999b0d Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: base64 PGRpdiBkaXI9Imx0ciI+PGRpdj5FeGFtcGxlLCBJIGV2YWwgdGhpcyBpbiB0aGUgc2NyYXRjaCBi dWZmZXIgKHdpdGggbGV4aWNhbC1iaW5kaW5nIHNldCB0cnVlKTo8YnI+PGJyPsKgwqDCoCAocmVh ZCAobGV0ICgoc3RyICZxdW90O1RFU1QmcXVvdDspPGJyPsKgwqDCoMKgwqDCoMKgwqDCoMKgwqDC oMKgwqDCoCAocG9zIDApPGJyPsKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoCAocHJldiBu aWwpKTxicj7CoMKgwqDCoMKgwqDCoMKgwqDCoMKgIChsYW1iZGEgKGNoKTxicj7CoMKgwqDCoMKg wqDCoMKgwqDCoMKgwqDCoCAoY29uZDxicj7CoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAg KGNoIChwdXNoIGNoIHByZXYpKTxicj7CoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgKHBy ZXYgKHBvcCBwcmV2KSk8YnI+wqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgICgoJmx0OyBw b3MgKGxlbmd0aCBzdHIpKTxicj7CoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoCAocHJv ZzEgKGFyZWYgc3RyIHBvcyk8YnI+wqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKg IChzZXRxIHBvcyAoMSsgcG9zKSkpKSkpKSk8YnI+PGJyPjwvZGl2PkFjY29yZGluZyB0byB0aGUg ZG9jcyBbMV0gYW4gaW5wdXQgc3RyZWFtIGNhbiBiZSBhIGZ1bmN0aW9uLsKgIEkgd291bGQgZXhw ZWN0IHRoZSBhYm92ZSB0byByZXR1cm4gdGhlIHN5bWJvbCBURVNULCBidXQgaW5zdGVhZCBJIGdl dCBhbiBlcnJvciAoJnF1b3Q7ZW5kIG9mIGZpbGUgZHVyaW5nIHBhcnNpbmcmcXVvdDspLjxicj48 YnI+WzFdIDxhIGhyZWY9Imh0dHA6Ly93d3cuZ251Lm9yZy9zb2Z0d2FyZS9lbWFjcy9tYW51YWwv aHRtbF9ub2RlL2VsaXNwL0lucHV0LVN0cmVhbXMuaHRtbCNJbnB1dC1TdHJlYW1zIj5odHRwOi8v d3d3LmdudS5vcmcvc29mdHdhcmUvZW1hY3MvbWFudWFsL2h0bWxfbm9kZS9lbGlzcC9JbnB1dC1T dHJlYW1zLmh0bWwjSW5wdXQtU3RyZWFtczwvYT48YnIgY2xlYXI9ImFsbCI+PGRpdj48ZGl2Pjxi cj4tLSA8YnI+PGRpdiBjbGFzcz0iZ21haWxfc2lnbmF0dXJlIj5NaWhhaSBCYXpvbiw8YnI+PGEg aHJlZj0iaHR0cDovL2xpc3BlcmF0b3IubmV0LyIgdGFyZ2V0PSJfYmxhbmsiPmh0dHA6Ly9saXNw ZXJhdG9yLm5ldC88L2E+PC9kaXY+DQo8L2Rpdj48L2Rpdj48L2Rpdj4NCg== --047d7bdca686ae4177052d999b0d-- From unknown Sun Jun 22 22:46:44 2025 X-Loop: help-debbugs@gnu.org Subject: bug#22961: The read function does not support a lambda argument Resent-From: John Mastro Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Wed, 09 Mar 2016 18:28:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 22961 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: 22961@debbugs.gnu.org Cc: Mihai =?UTF-8?Q?C=C4=83lin?= Bazon Received: via spool by 22961-submit@debbugs.gnu.org id=B22961.145754807523566 (code B ref 22961); Wed, 09 Mar 2016 18:28:01 +0000 Received: (at 22961) by debbugs.gnu.org; 9 Mar 2016 18:27:55 +0000 Received: from localhost ([127.0.0.1]:41786 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84) (envelope-from ) id 1adipv-000682-73 for submit@debbugs.gnu.org; Wed, 09 Mar 2016 13:27:55 -0500 Received: from mail-yk0-f174.google.com ([209.85.160.174]:36561) by debbugs.gnu.org with esmtp (Exim 4.84) (envelope-from ) id 1adipt-00067q-IV for 22961@debbugs.gnu.org; Wed, 09 Mar 2016 13:27:53 -0500 Received: by mail-yk0-f174.google.com with SMTP id r203so19218437ykd.3 for <22961@debbugs.gnu.org>; Wed, 09 Mar 2016 10:27:53 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc:content-transfer-encoding; bh=noTLQ6OtGfCOCidvRUPG58xx9Ir3TiUfXNIOWakNkoU=; b=m4ZOluKWMNI1p8eQ0lrhGG51UZLbPBGbIAs9v4WyTZthe782DN3DiE6+llGgoj9vsV ZXfnzkmQQynJUa8fx0E67W0M6Wmdq58gBxrThUnZKmcWIrilgW1HM3I//gwYgyeh1OPq wkvT0bH7Hqg5jVY+mlR2TvPGDykMD6wLRhuWwVebHRW8txqP30cCAa6dJbEMZt2b8Pbb S9KtWOss8TbvVOWJ6nAAviVMhXyPHdHqOqDMTG9cq3s/zAnJPgnGlcjFwLotzz45hH0u pnjpwse7EHjsoE06v6N7txwj3NZKTUxL+gb7r2/vFkm9o3vBtcQ8QbZJ33aCcwczoTTv 962g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=noTLQ6OtGfCOCidvRUPG58xx9Ir3TiUfXNIOWakNkoU=; b=mOxKt6qqXOJPaBpSrsu+nWYPhLoKzumNiq5Aq4CBnjvRNxy0VUIB6+0wmUf2ZBv8kX 5civ5bDgeWSx+0N+CZ9+LYccE1bPrdExW7PKTXs5/An3IsvvEuacEtblEtZ36WxOn3C2 VOg83N3tJdZdmuwXGWIA6gUE+K3hMk4a3z43J8FD79QRM1+UM9n2qPsPtd7X5BqMQksq mf9t1aRpTTO56VowzsdnJuD0UMsWOSfIRCnj/2QPheno8eKGXyuf+tFRCipq+MvAnM2z e/uoPipYpmK1c99ZJGswPE7nEaYlwEjWlrJO27rYOnoFUJD51hHhYSsiKOxihVStn5bm 0QuA== X-Gm-Message-State: AD7BkJIaExXxT+DQgwOAPsPG01gXQo+7UQ1keZQCbj4qly6nLzVQZ0RZmPSpDuXxKfoEjyDODAlmddf7a44wFQ== X-Received: by 10.37.92.139 with SMTP id q133mr19839606ybb.118.1457548068208; Wed, 09 Mar 2016 10:27:48 -0800 (PST) MIME-Version: 1.0 Received: by 10.37.66.140 with HTTP; Wed, 9 Mar 2016 10:27:28 -0800 (PST) In-Reply-To: References: From: John Mastro Date: Wed, 9 Mar 2016 10:27:28 -0800 Message-ID: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Spam-Score: -0.7 (/) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -0.7 (/) Mihai C=C4=83lin Bazon wrote: > Example, I eval this in the scratch buffer (with lexical-binding set true= ): > > (read (let ((str "TEST") > (pos 0) > (prev nil)) > (lambda (ch) > (cond > (ch (push ch prev)) > (prev (pop prev)) > ((< pos (length str)) > (prog1 (aref str pos) > (setq pos (1+ pos)))))))) > > According to the docs [1] an input stream can be a function. I would exp= ect > the above to return the symbol TEST, but instead I get an error ("end of > file during parsing"). Confirmed on Emacs 25. However, it does work with a named defun: (let ((str "TEST") (pos 0) (prev nil)) (defun my-read-function (&optional ch) (cond (ch (push ch prev)) (prev (pop prev)) ((< pos (length str)) (prog1 (elt str pos) (setq pos (1+ pos))))))) (read #'my-read-function) ;=3D> TEST (Mihai, the =E2=80=98ch=E2=80=99 argument should be =E2=80=98&optional=E2= =80=99, though that's not related to the error in question). --=20 john From unknown Sun Jun 22 22:46:44 2025 MIME-Version: 1.0 X-Mailer: MIME-tools 5.505 (Entity 5.505) X-Loop: help-debbugs@gnu.org From: help-debbugs@gnu.org (GNU bug Tracking System) To: Mihai =?UTF-8?Q?C=C4=83lin?= Bazon Subject: bug#22961: closed (Re: bug#22961: The read function does not support a lambda argument) Message-ID: References: <87y49ro5f2.fsf@linux-m68k.org> X-Gnu-PR-Message: they-closed 22961 X-Gnu-PR-Package: emacs Reply-To: 22961@debbugs.gnu.org Date: Wed, 09 Mar 2016 18:47:02 +0000 Content-Type: multipart/mixed; boundary="----------=_1457549222-25310-1" This is a multi-part message in MIME format... ------------=_1457549222-25310-1 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Your bug report #22961: The read function does not support a lambda argument which was filed against the emacs package, has been closed. The explanation is attached below, along with your original report. If you require more details, please reply to 22961@debbugs.gnu.org. --=20 22961: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=3D22961 GNU Bug Tracking System Contact help-debbugs@gnu.org with problems ------------=_1457549222-25310-1 Content-Type: message/rfc822 Content-Disposition: inline Content-Transfer-Encoding: 7bit Received: (at 22961-done) by debbugs.gnu.org; 9 Mar 2016 18:46:47 +0000 Received: from localhost ([127.0.0.1]:41798 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84) (envelope-from ) id 1adj8B-0006Zo-1K for submit@debbugs.gnu.org; Wed, 09 Mar 2016 13:46:47 -0500 Received: from mail-out.m-online.net ([212.18.0.9]:35682) by debbugs.gnu.org with esmtp (Exim 4.84) (envelope-from ) id 1adj88-0006Zf-QR for 22961-done@debbugs.gnu.org; Wed, 09 Mar 2016 13:46:45 -0500 Received: from frontend01.mail.m-online.net (unknown [192.168.8.182]) by mail-out.m-online.net (Postfix) with ESMTP id 3qL2SM4gysz3hjNh; Wed, 9 Mar 2016 19:46:43 +0100 (CET) Received: from localhost (dynscan1.mnet-online.de [192.168.6.68]) by mail.m-online.net (Postfix) with ESMTP id 3qL2SM2t0LzvhMg; Wed, 9 Mar 2016 19:46:43 +0100 (CET) X-Virus-Scanned: amavisd-new at mnet-online.de Received: from mail.mnet-online.de ([192.168.8.182]) by localhost (dynscan1.mail.m-online.net [192.168.6.68]) (amavisd-new, port 10024) with ESMTP id ZU6b2gfJH88q; Wed, 9 Mar 2016 19:46:42 +0100 (CET) X-Auth-Info: qQ/KECHA2EwPe0bZ5WBHZG1nvuQ5otK4XJyH+bdSJahdNT4sEkYwg/IEFHVfFKuU Received: from igel.home (ppp-88-217-13-150.dynamic.mnet-online.de [88.217.13.150]) by mail.mnet-online.de (Postfix) with ESMTPA; Wed, 9 Mar 2016 19:46:42 +0100 (CET) Received: by igel.home (Postfix, from userid 1000) id 18CFD2C371A; Wed, 9 Mar 2016 19:46:42 +0100 (CET) From: Andreas Schwab To: Mihai =?utf-8?Q?C=C4=83lin?= Bazon Subject: Re: bug#22961: The read function does not support a lambda argument References: X-Yow: I'm in ATLANTIC CITY riding in a comfortable ROLLING CHAIR... Date: Wed, 09 Mar 2016 19:46:41 +0100 In-Reply-To: ("Mihai =?utf-8?Q?C=C4=83lin?= Bazon"'s message of "Wed, 9 Mar 2016 10:37:28 +0200") Message-ID: <87y49ro5f2.fsf@linux-m68k.org> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.0.92 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Spam-Score: -0.7 (/) X-Debbugs-Envelope-To: 22961-done Cc: 22961-done@debbugs.gnu.org X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -0.7 (/) Should be fixed in commit 711ca36. Andreas. -- Andreas Schwab, schwab@linux-m68k.org GPG Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5 "And now for something completely different." ------------=_1457549222-25310-1 Content-Type: message/rfc822 Content-Disposition: inline Content-Transfer-Encoding: 7bit Received: (at submit) by debbugs.gnu.org; 9 Mar 2016 16:27:11 +0000 Received: from localhost ([127.0.0.1]:41719 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84) (envelope-from ) id 1adgx4-0001dX-UD for submit@debbugs.gnu.org; Wed, 09 Mar 2016 11:27:11 -0500 Received: from eggs.gnu.org ([208.118.235.92]:45587) by debbugs.gnu.org with esmtp (Exim 4.84) (envelope-from ) id 1adZcf-0005J3-Lc for submit@debbugs.gnu.org; Wed, 09 Mar 2016 03:37:37 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1adZcZ-0008EN-N1 for submit@debbugs.gnu.org; Wed, 09 Mar 2016 03:37:32 -0500 X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on eggs.gnu.org X-Spam-Level: X-Spam-Status: No, score=0.8 required=5.0 tests=BAYES_50,FREEMAIL_FROM, HTML_MESSAGE,T_DKIM_INVALID autolearn=disabled version=3.3.2 Received: from lists.gnu.org ([2001:4830:134:3::11]:57137) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1adZcZ-0008E6-JE for submit@debbugs.gnu.org; Wed, 09 Mar 2016 03:37:31 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:36553) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1adZcY-0005et-Kb for bug-gnu-emacs@gnu.org; Wed, 09 Mar 2016 03:37:31 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1adZcX-0008B9-Mm for bug-gnu-emacs@gnu.org; Wed, 09 Mar 2016 03:37:30 -0500 Received: from mail-ig0-x22d.google.com ([2607:f8b0:4001:c05::22d]:35679) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1adZcX-0008AM-Ga for bug-gnu-emacs@gnu.org; Wed, 09 Mar 2016 03:37:29 -0500 Received: by mail-ig0-x22d.google.com with SMTP id vf5so6349993igb.0 for ; Wed, 09 Mar 2016 00:37:29 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to; bh=MO082kqNwovWBU3nbatCmPFKyCfgCr6ezLlsWw6TfOw=; b=zZT+guhzahtFPGHlrEXZSmsO1mCEmuyrGuuYp7YV9SRmjD+nzn5gQeJJq4/j3pUDbu OSgOUCEH2HrQsWjici87US4qp9OJZ7TmZUecuVSiJwJ/8QJryZOOAjZVhgBqR6yvpYaY FXWuN7V7QKMISSla6AsljrDkxbpQrvygOnF13kP3qHnow4jibFDHWho1nE+0TXHqB79l x4btFYPu/j8IIOTRl+1csgGZ7BZbbEphRI9Ruw/BL39q3G93pIAHG0gbwrS3VxxBU/vd tLoK2lRHW+hzdCe3eN9ami+fUiaXBDRYadGYaIuOn1nNp9AxLPYSsc6CJf9GW0ECzNUh lZ6Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=MO082kqNwovWBU3nbatCmPFKyCfgCr6ezLlsWw6TfOw=; b=DIh5c75u3gQgadq10CakXbvH6KyV4hJ99tsJ0RzTRhHh/Lfoge6xsSxm/nvjhm61op XXF4x5QmOxtjDD5jQjcCIcwYjrk7C61fWDpcQYI4UY+7hyKgEBSpumP8U8YvAPtoo9pv 1/iK6ykseqSFd0G4D62Qgw+kuWClmhsrl9Nhc2NHrnRJqPzGBmdaScYka2+XVp5V6gw1 MZi02mIUBl/jolpZ/ggsESlJrM92obDeV+687nalAsC2OccJMt9C7uUNrJUtPaMT7VbH i5tYpIiCCDwxqBja4CW/yqNOuEwF5eh55+ZGOS6P9rcLtR9ae79nqRKkxblR+n11wHOu NSFg== X-Gm-Message-State: AD7BkJKBpO8UrrT7x63IqUKMg7dXYSUcECI96lAvIHeqY7avnpFwtVagVIUXcwax9NtZqRSQIblaG8ZIpNuwuA== MIME-Version: 1.0 X-Received: by 10.50.50.177 with SMTP id d17mr11171395igo.10.1457512648685; Wed, 09 Mar 2016 00:37:28 -0800 (PST) Received: by 10.107.4.72 with HTTP; Wed, 9 Mar 2016 00:37:28 -0800 (PST) Date: Wed, 9 Mar 2016 10:37:28 +0200 Message-ID: Subject: The read function does not support a lambda argument From: =?UTF-8?Q?Mihai_C=C4=83lin_Bazon?= To: bug-gnu-emacs@gnu.org Content-Type: multipart/alternative; boundary=047d7bdca686ae4177052d999b0d X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x X-Received-From: 2001:4830:134:3::11 X-Spam-Score: -4.0 (----) X-Debbugs-Envelope-To: submit X-Mailman-Approved-At: Wed, 09 Mar 2016 11:27:10 -0500 X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -4.0 (----) --047d7bdca686ae4177052d999b0d Content-Type: text/plain; charset=UTF-8 Example, I eval this in the scratch buffer (with lexical-binding set true): (read (let ((str "TEST") (pos 0) (prev nil)) (lambda (ch) (cond (ch (push ch prev)) (prev (pop prev)) ((< pos (length str)) (prog1 (aref str pos) (setq pos (1+ pos)))))))) According to the docs [1] an input stream can be a function. I would expect the above to return the symbol TEST, but instead I get an error ("end of file during parsing"). [1] http://www.gnu.org/software/emacs/manual/html_node/elisp/Input-Streams.html#Input-Streams -- Mihai Bazon, http://lisperator.net/ --047d7bdca686ae4177052d999b0d Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: base64 PGRpdiBkaXI9Imx0ciI+PGRpdj5FeGFtcGxlLCBJIGV2YWwgdGhpcyBpbiB0aGUgc2NyYXRjaCBi dWZmZXIgKHdpdGggbGV4aWNhbC1iaW5kaW5nIHNldCB0cnVlKTo8YnI+PGJyPsKgwqDCoCAocmVh ZCAobGV0ICgoc3RyICZxdW90O1RFU1QmcXVvdDspPGJyPsKgwqDCoMKgwqDCoMKgwqDCoMKgwqDC oMKgwqDCoCAocG9zIDApPGJyPsKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoCAocHJldiBu aWwpKTxicj7CoMKgwqDCoMKgwqDCoMKgwqDCoMKgIChsYW1iZGEgKGNoKTxicj7CoMKgwqDCoMKg wqDCoMKgwqDCoMKgwqDCoCAoY29uZDxicj7CoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAg KGNoIChwdXNoIGNoIHByZXYpKTxicj7CoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgKHBy ZXYgKHBvcCBwcmV2KSk8YnI+wqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgICgoJmx0OyBw b3MgKGxlbmd0aCBzdHIpKTxicj7CoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoCAocHJv ZzEgKGFyZWYgc3RyIHBvcyk8YnI+wqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKg IChzZXRxIHBvcyAoMSsgcG9zKSkpKSkpKSk8YnI+PGJyPjwvZGl2PkFjY29yZGluZyB0byB0aGUg ZG9jcyBbMV0gYW4gaW5wdXQgc3RyZWFtIGNhbiBiZSBhIGZ1bmN0aW9uLsKgIEkgd291bGQgZXhw ZWN0IHRoZSBhYm92ZSB0byByZXR1cm4gdGhlIHN5bWJvbCBURVNULCBidXQgaW5zdGVhZCBJIGdl dCBhbiBlcnJvciAoJnF1b3Q7ZW5kIG9mIGZpbGUgZHVyaW5nIHBhcnNpbmcmcXVvdDspLjxicj48 YnI+WzFdIDxhIGhyZWY9Imh0dHA6Ly93d3cuZ251Lm9yZy9zb2Z0d2FyZS9lbWFjcy9tYW51YWwv aHRtbF9ub2RlL2VsaXNwL0lucHV0LVN0cmVhbXMuaHRtbCNJbnB1dC1TdHJlYW1zIj5odHRwOi8v d3d3LmdudS5vcmcvc29mdHdhcmUvZW1hY3MvbWFudWFsL2h0bWxfbm9kZS9lbGlzcC9JbnB1dC1T dHJlYW1zLmh0bWwjSW5wdXQtU3RyZWFtczwvYT48YnIgY2xlYXI9ImFsbCI+PGRpdj48ZGl2Pjxi cj4tLSA8YnI+PGRpdiBjbGFzcz0iZ21haWxfc2lnbmF0dXJlIj5NaWhhaSBCYXpvbiw8YnI+PGEg aHJlZj0iaHR0cDovL2xpc3BlcmF0b3IubmV0LyIgdGFyZ2V0PSJfYmxhbmsiPmh0dHA6Ly9saXNw ZXJhdG9yLm5ldC88L2E+PC9kaXY+DQo8L2Rpdj48L2Rpdj48L2Rpdj4NCg== --047d7bdca686ae4177052d999b0d-- ------------=_1457549222-25310-1-- From unknown Sun Jun 22 22:46:44 2025 X-Loop: help-debbugs@gnu.org Subject: bug#22961: The read function does not support a lambda argument References: In-Reply-To: Resent-From: Kaushal Modi Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Wed, 09 Mar 2016 20:32:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 22961 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: 22961@debbugs.gnu.org, mihai.bazon@gmail.com Cc: John Mastro , Andreas Schwab Received: via spool by 22961-submit@debbugs.gnu.org id=B22961.14575555142176 (code B ref 22961); Wed, 09 Mar 2016 20:32:01 +0000 Received: (at 22961) by debbugs.gnu.org; 9 Mar 2016 20:31:54 +0000 Received: from localhost ([127.0.0.1]:41851 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84) (envelope-from ) id 1adklu-0000Z2-Dp for submit@debbugs.gnu.org; Wed, 09 Mar 2016 15:31:54 -0500 Received: from mail-oi0-f52.google.com ([209.85.218.52]:33159) by debbugs.gnu.org with esmtp (Exim 4.84) (envelope-from ) id 1adkls-0000Yp-Fn for 22961@debbugs.gnu.org; Wed, 09 Mar 2016 15:31:52 -0500 Received: by mail-oi0-f52.google.com with SMTP id d205so45085263oia.0 for <22961@debbugs.gnu.org>; Wed, 09 Mar 2016 12:31:52 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:from:date:message-id:subject:to:cc; bh=dyJ04xH2QKNYcRl6QBn/XYIXN9u3mrzTuJzXPbx4FMk=; b=u13Bv4KgFRyd238ROzEJUVJP89eM6AjugnIP9vM/mLPUAhkPU8XFHoMbBuIlC1IZ+p oGmChoWzpRFK2GNLRW4ItRl2z9bNyFFIikM8yipBEI4SwGjFNATCHYmATMoLJYRh+t+T hoAYGr64EnurZw3nLJkQkPc3V65CWnUzh7JpNbpAKWrGmh39+VLGLCp9I/EnBzjfZ7yg XptzJr7X+xpO5fzYgosnfEHuvqQMJ0YlIuxHemAe9oiWCEjDb8sQjfBE9JnELSluZa+z 2z+abBdMOCFPjFqXlFbw3A2RjVDjGczV/U+bdljgyKmmZamUwwBMj+GN/ZvxwEyEQuKX 4wQw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:from:date:message-id:subject:to:cc; bh=dyJ04xH2QKNYcRl6QBn/XYIXN9u3mrzTuJzXPbx4FMk=; b=hVrvMKcvssU4O13rYQFyLIIpg1JAAIkEfsgwzLQF+1srPCWG3130Ygp5W1GLk95ZiG WwpvWLUgITVJQR9U+7/Vl8o6NUM+hQjimGgYd5cB9jvnz8nhQ01r7xD2c9sDGAIO1Zc7 4SAJuRVPjMBGDUzojRkaA/iSrRf+r1wEQ570QRfTe57Tn1xJQ0wEXfHbsHyOd/D1Oa2O BAMmUSH4y8921miWHPXC91I+8AQAtwBvm7FBGUzeP8YsZJqRSUIUkbKP9fLm9CaN6CzZ kWSY75I66Asq1VdKn8U6t+NswJywanLt84BVmqW+OX0JQu0xMckQwYfC3ntdpSBfTHYN f0GQ== X-Gm-Message-State: AD7BkJJhfEwZ3mbi+owmHdwfFk2rn2OXZJdzeApF+CNVK3M8AcmDuwEWz1HeDOPoxz0wS5/NJcW+xjN19aHOFg== X-Received: by 10.202.185.214 with SMTP id j205mr138025oif.68.1457555506606; Wed, 09 Mar 2016 12:31:46 -0800 (PST) MIME-Version: 1.0 Received: by 10.202.172.198 with HTTP; Wed, 9 Mar 2016 12:31:07 -0800 (PST) From: Kaushal Modi Date: Wed, 9 Mar 2016 15:31:07 -0500 Message-ID: Content-Type: multipart/alternative; boundary=001a113cd1fa36414b052da39696 X-Spam-Score: -0.7 (/) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -0.7 (/) --001a113cd1fa36414b052da39696 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable I just re-built using this commit ( http://git.savannah.gnu.org/cgit/emacs.git/commit/?h=3Demacs-25&id=3D711ca3= 62e7f8ca7c4f664dc2fe60bc5fa4e4f4fe ). Now the earlier error went away, but I get Symbol=E2=80=99s value as variable is void: prev I guess the read call should be inside the let: (let ((str "TEST") (pos 0) (prev nil)) (read (lambda (&optional ch) (cond (ch (push ch prev)) (prev (pop prev)) ((< pos (length str)) (prog1 (aref str pos) (setq pos (1+ pos)))))))) Above returns "TEST". --001a113cd1fa36414b052da39696 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable

Now the earlier error went away, but I g= et=C2=A0

=C2=A0=C2=A0Symbol=E2=80=99s value as var= iable is void: prev

I guess the read call should b= e inside the let:

(let ((str "TEST"= )
=C2=A0 =C2=A0 =C2=A0 (pos 0)
=C2=A0 =C2=A0 =C2=A0 (pr= ev nil))
=C2=A0 (read (lambda (&optional ch)
=C2=A0= =C2=A0 =C2=A0 =C2=A0 =C2=A0 (cond
=C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0(ch (push ch prev))
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0(prev (pop prev))
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0((< pos (length str))
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0= =C2=A0 (prog1 (aref str pos)
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 (setq pos (1+ pos))))))))

Abov= e returns "TEST".
--001a113cd1fa36414b052da39696-- From unknown Sun Jun 22 22:46:44 2025 X-Loop: help-debbugs@gnu.org Subject: bug#22961: The read function does not support a lambda argument Resent-From: Mihai =?UTF-8?Q?C=C4=83lin?= Bazon Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Wed, 09 Mar 2016 21:11:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 22961 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: Kaushal Modi Cc: John Mastro , Andreas Schwab , 22961@debbugs.gnu.org Received: via spool by 22961-submit@debbugs.gnu.org id=B22961.14575578475671 (code B ref 22961); Wed, 09 Mar 2016 21:11:02 +0000 Received: (at 22961) by debbugs.gnu.org; 9 Mar 2016 21:10:47 +0000 Received: from localhost ([127.0.0.1]:41888 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84) (envelope-from ) id 1adlNX-0001TP-1v for submit@debbugs.gnu.org; Wed, 09 Mar 2016 16:10:47 -0500 Received: from mail-io0-f176.google.com ([209.85.223.176]:35916) by debbugs.gnu.org with esmtp (Exim 4.84) (envelope-from ) id 1adlNU-0001TB-P3 for 22961@debbugs.gnu.org; Wed, 09 Mar 2016 16:10:45 -0500 Received: by mail-io0-f176.google.com with SMTP id z76so81942191iof.3 for <22961@debbugs.gnu.org>; Wed, 09 Mar 2016 13:10:44 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc; bh=q4jAbX0S7WGsjOz1Wke0p8gzfMrxmgiQzKBHUIaH+jk=; b=mS+M/Ndn1Cbx8HObvWtQkEWQ+nwG/qOPXegKV5y7wXE6PRcE41EHVvF8ld0oUVhgjE 8YTkxDyMWlDb0dgJIRmhcoW7CltqOgMhPwfIvRsIMJIbUTG7t2ZaYm+kXjokm/iDf08j RbmIMXcyc6or1pgytrw+vH1KjYMODldn22+dlcAcjTZTi21TZnltxn8IfLPieino1F5p 6whYKwsXvTHVNxWYNcYufRyTGFB9iAfm2fSXlpLGxT+DIiFJrv/K0/7BCpYEbWa62H1b XBVaFGBnp7f8vzI5Husd280Y5VE+Ei4Rs88j+zt0tj7DMeaWFMmWPY+PQ+0Xd4kT1Ng+ 6SBA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc; bh=q4jAbX0S7WGsjOz1Wke0p8gzfMrxmgiQzKBHUIaH+jk=; b=YU+zodFLt2RMoUqW57LvyxyDI9Y32jqG2ZJ5ThUqbYLBnhXJLys1mD9p+SST2u/b3G Dneqe8IWHKWSjOD06v8zVziVpafk87vq53Ul6PhZH1Doir7WtthrJojHHxKsM0dmCCz0 8ckf4z4H0gx+TUne3nisChhRGjJHKe4fqhRPrMNCqYQDJh4Jun5Azbjxy6J3Kb98rrgl CLLy0p6PfCLcLv2QHVQPgatSOkYf786am20gs1VvkXsPF2XNLphvCU8OomyS7ofdmMXI igXzc54FN02cC3n0AgbB69XVumixTTKQ+SmikIXFhQvWMrkZgLkU7IsouEE2ETiR+b69 SFAg== X-Gm-Message-State: AD7BkJLMCgam7QmOwudhYe6PJVenxvfYqi/bbR6TR9k/Icuv8H12NJ+ESplCuIHeCRH2PkVCbkgBJVNPbibeew== MIME-Version: 1.0 X-Received: by 10.107.161.206 with SMTP id k197mr1315348ioe.139.1457557839260; Wed, 09 Mar 2016 13:10:39 -0800 (PST) Received: by 10.107.4.72 with HTTP; Wed, 9 Mar 2016 13:10:39 -0800 (PST) In-Reply-To: References: Date: Wed, 9 Mar 2016 23:10:39 +0200 Message-ID: From: Mihai =?UTF-8?Q?C=C4=83lin?= Bazon Content-Type: multipart/alternative; boundary=001a1140f9883ff1e9052da4214f X-Spam-Score: -0.7 (/) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -0.7 (/) --001a1140f9883ff1e9052da4214f Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable You should (setq lexical-binding t) before running it (and note that's buffer-local, I've been bitten by that several times). With lexical binding my original example should work (with the fix, as John pointed out, that the argument should be &optional). Thanks Andreas for the quick fix! :-) On Wed, Mar 9, 2016 at 10:31 PM, Kaushal Modi wrote: > I just re-built using this commit ( > http://git.savannah.gnu.org/cgit/emacs.git/commit/?h=3Demacs-25&id=3D711c= a362e7f8ca7c4f664dc2fe60bc5fa4e4f4fe > ). > > Now the earlier error went away, but I get > > Symbol=E2=80=99s value as variable is void: prev > > I guess the read call should be inside the let: > > (let ((str "TEST") > (pos 0) > (prev nil)) > (read (lambda (&optional ch) > (cond > (ch (push ch prev)) > (prev (pop prev)) > ((< pos (length str)) > (prog1 (aref str pos) > (setq pos (1+ pos)))))))) > > Above returns "TEST". > --=20 Mihai Bazon, http://lisperator.net/ --001a1140f9883ff1e9052da4214f Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
You should (setq lexical-binding t) before runni= ng it (and note that's buffer-local, I've been bitten by that sever= al times).=C2=A0 With lexical binding my original example should work (with= the fix, as John pointed out, that the argument should be &optional).<= br>

Thanks Andreas for the quick fix! :-)

On Wed, Mar 9, 2016 at 10:= 31 PM, Kaushal Modi <kaushal.modi@gmail.com> wrote:
=

Now the earlier error went away, but I get=C2=A0

=C2=A0=C2=A0Symbol=E2=80=99s value as variable is void: prev
<= div>
I guess the read call should be inside the let:

(let ((str "TEST")
=C2=A0 =C2=A0 = =C2=A0 (pos 0)
=C2=A0 =C2=A0 =C2=A0 (prev nil))
=C2=A0 = (read (lambda (&optional ch)
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 (cond
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0(ch (push ch p= rev))
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0(prev (pop prev))<= /div>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0((< pos (length str))=
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 (prog1 (aref str pos)<= /div>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 (setq pos (1+ po= s))))))))

Above returns "TEST".



--
Mihai Bazon,
http://lisperator.net/
--001a1140f9883ff1e9052da4214f--