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[95.29.46.69]) by smtp.gmail.com with ESMTPSA id f6sm4507lfe.190.2021.09.29.07.20.11 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 29 Sep 2021 07:20:12 -0700 (PDT) From: =?utf-8?Q?Andr=C3=A9_A=2E_Gomes?= To: help-guix@gnu.org Subject: Meaning of "~@" in the format procedure Date: Wed, 29 Sep 2021 17:20:11 +0300 Message-ID: <874ka3zco4.fsf@gmail.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Received-SPF: pass client-ip=2a00:1450:4864:20::132; envelope-from=andremegafone@gmail.com; helo=mail-lf1-x132.google.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, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-Mailman-Approved-At: Wed, 29 Sep 2021 12:15:22 -0400 X-BeenThere: help-guix@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-guix-bounces+larch=yhetil.org@gnu.org Sender: "Help-Guix" X-Migadu-Flow: FLOW_IN ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=yhetil.org; s=key1; t=1632932177; h=from:from:sender:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding:list-id:list-help: list-unsubscribe:list-subscribe:list-post:dkim-signature; bh=jbo6H2Hgb8REVVypi8/3QC9hxJUI2eMMVGHlUasI2x0=; b=m/lQfCEti+ZqsUNsN54y/hnokpiUoxNKC9rDFG+dtII9LjWdKj0T8CeP1EaanWgF7nn680 kJhZhOdjkPCfMxI3ctKYhqr+kxG4rl12G8m1558N8VO05gigr9ciiVsI4T7Z72SI/SCnOj kdu3CIW1jpWBRMVzt0siW+OW5Tc4JxDxA8guH03OLnGmBrgY1OaTBJKc0aG8XRPvtOWFqT dYPRaAheadX1EqyQcnZ650IpNWHTxlhmADpujRdLIz6Dma/rN6NTy6sUrD7qz/y3vNjGNK yYb9lfS2tN6Zg+d7PYqcPjZXaOAWtZGZexEWWJCDBl9Y+nYXnwtIkN9Inwc6UA== ARC-Seal: i=1; s=key1; d=yhetil.org; t=1632932177; a=rsa-sha256; cv=none; b=QwXASAbZE89/PVtVtPYubC1u3HVjrKQgy8w5nDi03L+OI4gJQe/pDVLC+IKgzOC/S+0ml5 xWOTakTtTszJlzvZgkA1tfUw2vPFlybIhEyHBNNQ+4Zq7EfxW+b7Sh2obYigBHZeb6GFsd tdNwCPKQuA/DyRRfbbdrmIzxqlNhfD15Dy1+C32RV/H4ySo5vH8AbWwgEbAipqJmM8Jd43 lqdtFRD2hxGVbpA3LxXmQT7yzslapx/TPvfFAfuLgNZDO6toGci6OPMyYA9cgwivkFLYvX NKZ+iaoucaCvf0KHQQ1K3vqcBF38FLjGwOZK5PXjGnQnpVp5XjKc89g9TAYPSA== ARC-Authentication-Results: i=1; aspmx1.migadu.com; dkim=pass header.d=gmail.com header.s=20210112 header.b=RkOEG6BB; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (aspmx1.migadu.com: domain of help-guix-bounces@gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=help-guix-bounces@gnu.org X-Migadu-Spam-Score: -4.00 Authentication-Results: aspmx1.migadu.com; dkim=pass header.d=gmail.com header.s=20210112 header.b=RkOEG6BB; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (aspmx1.migadu.com: domain of help-guix-bounces@gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=help-guix-bounces@gnu.org X-Migadu-Queue-Id: 2F8E82E9BF X-Spam-Score: -4.00 X-Migadu-Scanner: scn1.migadu.com X-TUID: +6qSWwaMZNLb Hi, I see that "~@" is used frequently in Guix' codebase in the format procedure but I don't understand what it does. (info "(guile) Formatted Output") didn't help much. For a specific example, look at the package definition of emacs-exwm. Speaking of that, what does "$@" do after emacs? --8<---------------cut here---------------start------------->8--- emacs "$@" --eval 'a-sexp' --8<---------------cut here---------------end--------------->8--- Thank you. --=20 Andr=C3=A9 A. Gomes "Free Thought, Free World"