From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Michael Heerdegen Newsgroups: gmane.emacs.bugs Subject: bug#49116: 28.0.50; Why `bound-and-true-p' is not working in lexical binding? Date: Wed, 23 Jun 2021 01:00:11 +0200 Message-ID: <87h7hptshw.fsf@web.de> References: <861r8yozg5.fsf@protected.rcdrun.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="20761"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) Cc: 49116@debbugs.gnu.org To: Jean Louis Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Wed Jun 23 01:01:09 2021 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1lvpOH-0005Ec-Eo for geb-bug-gnu-emacs@m.gmane-mx.org; Wed, 23 Jun 2021 01:01:09 +0200 Original-Received: from localhost ([::1]:36408 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lvpOG-0001gs-1t for geb-bug-gnu-emacs@m.gmane-mx.org; 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Wed, 23 Jun 2021 01:00:17 +0200 In-Reply-To: <861r8yozg5.fsf@protected.rcdrun.com> (Jean Louis's message of "Sat, 19 Jun 2021 14:39:54 +0300") X-Provags-ID: V03:K1:HO92XYeJtPSdR6cMvDZNHVBJxMpvX5FleLYw6lOz32vmZLLeCRp sDQu8+nE2lLKvrcMaeeggApdRVHG4L7YuX7p9CCoPxImq0WKdbrzyuzaw1O4iiRUiJOopiL mXcnl2kAGJ7ET26ILnvTdJQSLj7pKdEgvuytByJmmfoXTB0JWpPg03PCl5fW8gEnQbGpc53 SEmGzKqMB1rR11QwwLDXw== X-UI-Out-Filterresults: notjunk:1;V03:K0:QBjcP7XHap8=:Dl6BVHeB0QeBx8wPJhRvif G6bgiKbQQ4jqG6Prd5doCQQagFCKdwPNU5XyBKfwM6qIyUZc6w/8eS84PS/cNFVr2/drWNirk Sk3jzOEq74oYTyhjCdFcok67do3EL9NQMxYL5IzXH4a0uY1h5gu27TwAXUoRJ1b4vDuBa+NVa 3o8l3M9Iic0C7Y456r4qvhmHQjBrMkYD8TNL2XAyTeA1SIb5bY87uEZgZpIOaFFrBtmyNRYwF sXe3ux0TkHicJ62TR6w892t3Dx31/RVtNDmyvXRChr7wJLCRh2EUzQemmNQfuuAYPOhMUAUHm cmLSw3lZpHFjhmTFPRSocs05ta6jFOl7NL3gIwlfABpfB0Wo/6o8ol0wZXo62FmqXcBEiRz/2 kFB5V5DmDsReSn8MiNFuEjBRNtLL3LfVeN2wa9CibNS7IhXc1hdaSXoW+Djg3FaS9ts1I1lAV h/RGbIt2QXykHTosv6xDbG7VqQhhU+6BHepLzXQBsdXSDv/8HxuobVTEByej8DzB8T658iLSk 5VKirn7WTut+L1v2tkHtqheLYCH1VoRjhdqHnRo4DAB5z6sn8Bnh+DDgK796+ml25JgxA0hlE 32Uu9y0XRJodZdzs37jp5FUvwy4URwxoWnDbs4UO71vBfM2u5i/am9h6WRGb5H9InnA88E8x1 6f9sRtyjHiFOGYXQq1mGgULkfhHTM2imw7a3D0P3+ePlQOxuUuph/qdh0lMoJe1DsiAuQB2ZE BSkfIsL+TLr3Zt9VGoeYTx+uihTSQ8RnLoTXxxoHaM2aEthWtIGTihUG6nHoWhHcDfgN6wx/ X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list 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-mx.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.io gmane.emacs.bugs:208883 Archived-At: Jean Louis writes: > (defun verify-direction (timestamp &optional direction) > (cond ((bound-and-true-p direction) (message "OK")))) > > (verify-direction "10:00" t) =E2=87=92 nil BTW, if your original intention was to check whether a function argument has been specified in a function call (including nil) -- optional arguments in `cl-defun' support such a feature. Michael.