220 19973 article Path: news.gmane.org!not-for-mail From: Daryle Walker Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Should GCD/LCM take variable numbers of arguments? Date: Sat, 22 Aug 2015 21:51:08 -0700 (PDT) Lines: 111 Approved: news@gmane.org Message-ID: Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_Part_834_813212632.1440305468854" X-Trace: ger.gmane.org 1440305475 28384 80.91.229.3 (23 Aug 2015 04:51:15 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sun, 23 Aug 2015 04:51:15 +0000 (UTC) To: ISO C++ Standard - Future Proposals Original-X-From: std-proposals+bncBDS6X4FNQMPBBPVC4WXAKGQEKPVWYNA@isocpp.org Sun Aug 23 06:51:15 2015 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-pd0-f200.google.com ([209.85.192.200]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1ZTNFQ-0003Y3-PT for gclcip-std-proposals@m.gmane.org; Sun, 23 Aug 2015 06:51:12 +0200 Original-Received: by pdfx2 with SMTP id x2sf220713186pdf.2 for ; Sat, 22 Aug 2015 21:51:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=date:from:to:message-id:subject:mime-version:content-type :x-original-sender:reply-to:precedence:mailing-list:list-id :x-spam-checked-in-group:list-post:list-help:list-archive :list-subscribe:list-unsubscribe; bh=7hzoWPZOkMNz6qbfjTFDeQ1JTpNxKSu6HdZJTMn6Oeo=; b=XGO83XbX/qcKfcaXGqMcMERNbmEPS2MJ1SVpTlbvYTy2P9ETbYWug37hIq1XMhfrsD 5VIzYoNrSQKIem1b1AHymqDc8VDKiLwAMHsyk7U73zt/hpZciCy47i3uM+GZicshyQjL hTr9X8/y1JIBsbqqdAH7AlWnJhpoTe1gqwwmsVGS4KETlhVHs2jdyrtpzVKHWi0SHkrC Kfe/1rya5gQq07fN9PWB8nBE3CjZg3Vh5AZhqZKpGjBMYhMh+t0lm33as5WWLc/JY4XX J9fWycqxxivB7KVot+qDFn9n0i1/5L/rBelvoq6IkxiAeRdphB00uF0WyVVK9ydTiR/J FgQg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:date:from:to:message-id:subject:mime-version :content-type:x-original-sender:reply-to:precedence:mailing-list :list-id:x-spam-checked-in-group:list-post:list-help:list-archive :list-subscribe:list-unsubscribe; bh=7hzoWPZOkMNz6qbfjTFDeQ1JTpNxKSu6HdZJTMn6Oeo=; b=CfV931KMUVDogppOyfaMwsSktJcSx/cMXvP9dP5S4gP/hVgs43m4I1IOSiH4OmpdJj 4sK3wfCt4ztnBnaFiiaGGmXYZeAqLQTr5RO5W0ZuVD0L22j32A8Zz5Z9NMBjIqeKt4Ox yo7S6vt0MLAnBqUR1oDX4uXQ1B4XOk9MNzEKFWy8ny9p76SkMF6F3X6qKuK0R7oiusbz /wxINGxuqFmYaon5nFtbawJ1qxSTwgXRtS4jIi82hCDNbbsm6ogMXLjjqcuoPDDqbcyk R1X2G15aUH7kH3hp0XKEWsALExWJHhcObCV5fpqSrOID/ehCL9MAXZiIqwmkowWnmY4V 2eAQ== X-Gm-Message-State: ALoCoQk/xLYhEt5nPWAutI7qMR6cRVngPlrtdAaNi6WOUlPaqD/FDTqxS1vRnC04QS3R605rv0jA X-Received: by 10.68.104.161 with SMTP id gf1mr15363183pbb.11.1440305471240; Sat, 22 Aug 2015 21:51:11 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.107.31.148 with SMTP id f142ls529605iof.72.gmail; Sat, 22 Aug 2015 21:51:10 -0700 (PDT) X-Received: by 10.50.4.72 with SMTP id i8mr160835igi.7.1440305470273; Sat, 22 Aug 2015 21:51:10 -0700 (PDT) X-Original-Sender: darylew@gmail.com Precedence: list Mailing-list: list std-proposals@isocpp.org; contact std-proposals+owners@isocpp.org List-ID: X-Spam-Checked-In-Group: std-proposals@isocpp.org X-Google-Group-Id: 399137483710 List-Post: , List-Help: , List-Archive: List-Subscribe: , List-Unsubscribe: , Xref: news.gmane.org gmane.comp.lang.c++.isocpp.proposals:19973 Archived-At: ------=_Part_834_813212632.1440305468854 Content-Type: multipart/alternative; boundary="----=_Part_835_2132862396.1440305468855" ------=_Part_835_2132862396.1440305468855 Content-Type: text/plain; charset=UTF-8 I recently saw descriptions of GCD and LCM as part of the Library Fundamentals v2 paper (N4529), the original paper (N4601), and cppreference.com. I'm wondering if those functions should take variable numbers of arguments. I mean like: constexpr T gcd(T x); // returns |x| constexpr common_type_t gcd(T x, U y); // current definition constexpr common_type_t gcd(T x, U y, V z, W ...a); // returns gcd(x, gcd(y, z, a...)) // And similar for "lcm" Good idea?... -- --- You received this message because you are subscribed to the Google Groups "ISO C++ Standard - Future Proposals" group. To unsubscribe from this group and stop receiving emails from it, send an email to std-proposals+unsubscribe@isocpp.org. To post to this group, send email to std-proposals@isocpp.org. Visit this group at http://groups.google.com/a/isocpp.org/group/std-proposals/. ------=_Part_835_2132862396.1440305468855 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
I recently saw descriptions of GCD and LCM as part of the = Library Fundamentals v2 paper (N4529), the original paper (N4601), and cppr= eference.com. I'm wondering if those functions should take variable num= bers of arguments. I mean like:

&l= t;typename= T<= span style=3D"color: #008;" class=3D"styled-by-prettify">>
constexpr T gcd(T x)= ; =C2=A0// returns |x|
<typename T= , typename= U>
constexpr common_type_t= <T, U> gcd(T x, U y); =C2=A0// current definition=
<ty= pename T, typename U, typename V, typenam= e... W>
constexpr common_type_t<= /span><T, U, V, W...> gcd(= T x, U y, V z, W ...a); =C2=A0// returns gcd(x, gcd(y, z, a...))

// And similar for "lcm"

<= br>
Good idea?...

--

---
You received this message because you are subscribed to the Google Groups &= quot;ISO C++ Standard - Future Proposals" group.
To unsubscribe from this group and stop receiving emails from it, send an e= mail to std-proposa= ls+unsubscribe@isocpp.org.
To post to this group, send email to std-proposals@isocpp.org.
Visit this group at http://groups.google.com/a/isocpp.org/group/std-proposals/<= /a>.
------=_Part_835_2132862396.1440305468855-- ------=_Part_834_813212632.1440305468854-- .