From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: =?UTF-8?Q?Cl=C3=A9ment?= Pit-Claudel Newsgroups: gmane.emacs.bugs Subject: bug#31715: cl-incf and cl-decf error out when passed a nil-valued variable as 'offset' Date: Tue, 5 Jun 2018 19:36:41 -0400 Message-ID: References: <1dff07f6-8da4-4e4c-a700-0bc39d6f2aa6@live.com> <874lii88hy.fsf@gmail.com> <87o9gqw21y.fsf@web.de> <871sdm851q.fsf@gmail.com> <87k1rc7sly.fsf@gmail.com> <6176bcee-a8da-8547-762b-4174652ad2a0@live.com> <87h8mg7r2c.fsf@gmail.com> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="I2WRlzTrkoVAm2cBoldn5di40t775WtJs" X-Trace: blaine.gmane.org 1528241707 12145 195.159.176.226 (5 Jun 2018 23:35:07 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Tue, 5 Jun 2018 23:35:07 +0000 (UTC) User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.8.0 Cc: Michael Heerdegen , 31715@debbugs.gnu.org To: Noam Postavsky Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Wed Jun 06 01:35:02 2018 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1fQLTi-00032W-2a for geb-bug-gnu-emacs@m.gmane.org; Wed, 06 Jun 2018 01:35:02 +0200 Original-Received: from localhost ([::1]:49603 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fQLVp-0001zt-5n for geb-bug-gnu-emacs@m.gmane.org; Tue, 05 Jun 2018 19:37:13 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:34772) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fQLVh-0001zZ-5S for bug-gnu-emacs@gnu.org; Tue, 05 Jun 2018 19:37:05 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fQLVe-0005sZ-3V for bug-gnu-emacs@gnu.org; Tue, 05 Jun 2018 19:37:05 -0400 Original-Received: from debbugs.gnu.org ([208.118.235.43]:55925) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1fQLVd-0005sL-UU for bug-gnu-emacs@gnu.org; Tue, 05 Jun 2018 19:37:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1fQLVd-000316-Ju for bug-gnu-emacs@gnu.org; Tue, 05 Jun 2018 19:37:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: =?UTF-8?Q?Cl=C3=A9ment?= Pit-Claudel Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Tue, 05 Jun 2018 23:37:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 31715 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 31715-submit@debbugs.gnu.org id=B31715.152824181311581 (code B ref 31715); Tue, 05 Jun 2018 23:37:01 +0000 Original-Received: (at 31715) by debbugs.gnu.org; 5 Jun 2018 23:36:53 +0000 Original-Received: from localhost ([127.0.0.1]:35589 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1fQLVV-00030j-II for submit@debbugs.gnu.org; Tue, 05 Jun 2018 19:36:53 -0400 Original-Received: from mout.kundenserver.de ([212.227.126.187]:49801) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1fQLVT-00030U-K8 for 31715@debbugs.gnu.org; Tue, 05 Jun 2018 19:36:52 -0400 Original-Received: from [192.168.1.109] ([73.126.99.55]) by mrelayeu.kundenserver.de (mreue007 [212.227.15.168]) with ESMTPSA (Nemesis) id 0MRvbR-1fslUb0XG5-00Sw7a; Wed, 06 Jun 2018 01:36:44 +0200 Openpgp: preference=signencrypt Autocrypt: addr=clement.pitclaudel@live.com; prefer-encrypt=mutual; keydata= xsFNBFStGiEBEAC8eHa+DdcrVtDSwYoIgoUtMfRAan4bdLxZuNIASy6iFytCHNsKqfPkq8zD YV2+uMtbdcnjapE038nidEMItNhO04JdZ+PJ6jvJo1gW+XI4fM8uzkGZauwR+d3hEq6goFSp rIlSlaVf2g5q4OKxI754yqwz00++EZhZQMntzoKQVV9stJ5eQ+gxTT1ANr7wQKbjn/8PM/Cg hBZvYLhh+WsS0Ko5qZuWdsvUBLpprmCWkP4FpZ234/tWpdVID65nlHpu25+6ajIcxfCIK+dN 2br0wN1szTeQFG19cfr3jXEvwHmLQbQqCg4UH+2b7JpMGR2/KWjqRWfWVvZMPVeJdOsZHx53 k6HIbEhvFBHbmqCI6FAZQjkgzGGkrSD92+jeMYiCTxRKqq2hFZ6xqQ6pJdXD1TXcIYPEs7rA MwcNMj8g4e6vuI+2CjHyQQkyMPAEi8guNPnyfBb648f1lxj7JiJu/ehRghIP5u/kLOsHNCKG QgCT04sawBZYHqEVYni8oHlGJcdWGT5/UI4B+wn70eXvYSScZEaB+S2s/bD0cdlSpHY5Od3l tpRZTva+ydswlrz4fxbYF45s6rFpqVwBMfNv3gqhBFXbuiEEctcTSGqhHxxT4R+24Yn+ZSBa EfUbrKnVTUmV20k+57rghiVw2wpj8v7sn3QXt96HJ9ImY4JvuwARAQABzTNDbMOpbWVudCBQ aXQtLUNsYXVkZWwgPGNsZW1lbnQucGl0Y2xhdWRlbEBsaXZlLmNvbT7CwXsEEwECACUCGyMG CwkIBwMC In-Reply-To: <87h8mg7r2c.fsf@gmail.com> X-Provags-ID: V03:K1:dDAuBkRWb3AJjrK99/qIWZhV9J89TQZGIo8bUhu0EzzidpV7CkH 7zP+24mgPno15OJX2qyCCMLkqUAIvWQUFfswnT4OCbFrirZG5banvxMc1/ssIHXdE+VdtYO Nihpx5xmemLzn5QR733h9kgfAUzOThT8nV0muXVqTUtOqXp/QGlDnn9C/05lYEgH4XUIRLv UwpUvcbWwzQyG1kdu6Fnw== X-UI-Out-Filterresults: notjunk:1;V01:K0:OFM6Oh2Hxtg=:051W/KZLGJ/d20FolNO3S8 6Q1zdDCd3Qk0AcappS7gwxdSeI7kE+xLltFx8D7/cBaU68jl3iDYUa1sG7K67oBJ+DOxgy9Ch 5QDfV3hzsUu1N80psDJHowS9PEinmLNEO2Pe9NbxSwaA3Gq1cjWYejqE5MqYvkPfOseY0njgR AEvt4PoNyz1GqPEDQQ5tCabTq/uWmSCcuMhexvQB3cYXXiUlY0ipe7JgMsCWXZGmeONXbki9q tdOLf9z6pwTEOCc5KH1M8qRgp0czzqx4E6klbqMLeqx2uQ/tKd24KygJOymIP1eSTq4RKCB5v DKdFAWqhHnWxHtpFM4ugOFW33RhNgpBhdHcMnf9Df4gl1kNpK2NzsLFvYMZNaFUkCsF2T+/99 478IfZYJXEVXL9SF90F38CodLfoXBvesXoVn6JC9q9PhGv7jTnxGaVKdSn/yPhdQ5obTkf0r1 7osMDel6l1G+qL+egAw2JP/b0rbHUygUAks7EPqB9JIUk8VwFZfJssQSNt+kOaODe0TrI3pi7 Gh5O7zgzHSYDa8U4J60EleW0OEfM5wHEfUDqLxjenp13R4HEQybbyPL4tv2VIRKEvszkSj2Do m9Xb3ACJN73czWJhS85d30gfTKGyL7/Oco9ga8EBDlnTdv98dP8VdphD/wxsYRJg3BrL948Af 68mcorMnnbnfFfIz1KclSq8cTJGEuHSU5usOnmr03aChYjpzh0tyjI33gbmW8VD3QYq0= X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 208.118.235.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.org gmane.emacs.bugs:147049 Archived-At: This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --I2WRlzTrkoVAm2cBoldn5di40t775WtJs Content-Type: multipart/mixed; boundary="ZEtLcEEVKNKUpR4O9AhC0cdTsLAtTe455"; protected-headers="v1" From: =?UTF-8?Q?Cl=c3=a9ment_Pit-Claudel?= To: Noam Postavsky Cc: Michael Heerdegen , 31715@debbugs.gnu.org Message-ID: Subject: Re: bug#31715: cl-incf and cl-decf error out when passed a nil-valued variable as 'offset' References: <1dff07f6-8da4-4e4c-a700-0bc39d6f2aa6@live.com> <874lii88hy.fsf@gmail.com> <87o9gqw21y.fsf@web.de> <871sdm851q.fsf@gmail.com> <87k1rc7sly.fsf@gmail.com> <6176bcee-a8da-8547-762b-4174652ad2a0@live.com> <87h8mg7r2c.fsf@gmail.com> In-Reply-To: <87h8mg7r2c.fsf@gmail.com> --ZEtLcEEVKNKUpR4O9AhC0cdTsLAtTe455 Content-Type: text/plain; charset=utf-8 Content-Language: en-GB Content-Transfer-Encoding: quoted-printable On 2018-06-05 19:26, Noam Postavsky wrote: > Cl=C3=A9ment Pit-Claudel writes: >=20 >> I'm not sure what to make of the result with SBCL and CLisp, since >> (incf x nil) also fails in both of them (whereas it works for us, >> since we can't distinguish nil and unspecified). >=20 > Oh, huh, I didn't think to check that case. Maybe we should just chang= e > cl-incf to disintguish between nil and unspecified then. Hmm, neat trick! Wouldn't that be backwards-incompatible, though? Plus, it's not common for ELisp functions to distinguish between unspecif= ied and nil, and changing cl-incf that way would make it less convenient = to wrap in other macros. If it doesn't had runtime costs, I'd be in favo= r of going the other route, and making sure that (cl-incf x y) adds 1 eve= n when y is bound to nil. >>> I don't think those are great examples of macros to emulate. >> >> Agreed, I was just collecting other examples, both in support and agai= nst my point. >=20 > Yeah, I just meant we can't really use those examples either to support= > or argue against your point. OK :) --ZEtLcEEVKNKUpR4O9AhC0cdTsLAtTe455-- --I2WRlzTrkoVAm2cBoldn5di40t775WtJs Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAEBCAAGBQJbFx6JAAoJEPqg+cTm90wj1ScP/R97nK3yNb0C4im6mKUXEbjx rUbx4ZvYOmJ0dNiSWQV6zMB9a7L4nzqcxfNszwEjf+UCqYKU6cKI/KcOh+rSRkex cB43Yqe80UpNwDlwGTwdZxiF7d19LpU8SNLapKyVO/l5jwcCYLCA1AgyZy/3euY3 JuRIxIC4MsL6edbZJLTfskzLLWt1Ub/6oFiQQmLvmWwcdf1/GgP1aPaltVjhna6u u0vMilqF30GqNG5rOPdVh9pEm3A6WKxpjQokwGc+md4pkdSzylzssNUBeyv/cyQo l+0fvKULKt+1ZRr0OCgtU8L3ZRjSh4d9k+MVMbcYGEARYgvsG6tVwf7WJ2j7qPLq zaYt3bNA/xb95NJAmMKpWF5GhnLiCbmPwy6jXxuSnPDhBZSxewQssTCfjQgLZxvC zfFoRwjWp6HlkIWDIPAvM+K04Y90bJWGSz2bie8KoToml1N5b6i7YI9ML+hDLZjn cmjSPf/knSmXdds8hbF1C7BUDNQ6L6cKFawkiT8DmYWW7GI1vDPnfmX9OVntenZp +ZRn5lRojrBEBBVCCwgyE6bbABozcFtQITDhYC+zVhuHTR6DeXxE3Di8UhSDpzuV gmw+pJUuA8jnduD35Ot95IqT0g8MR/YxqEKYL3jLECJcBASLaLhsUkknn8BbKUO8 gGdYJi0iCpVSxaO3hQMv =YekE -----END PGP SIGNATURE----- --I2WRlzTrkoVAm2cBoldn5di40t775WtJs--