220 26385 article Path: news.gmane.org!not-for-mail From: "S.B." Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: template Date: Sat, 25 Jun 2016 11:25:38 -0700 (PDT) Lines: 157 Approved: news@gmane.org Message-ID: References: <58413fd1-653d-4171-a250-baa99c0a597b@isocpp.org> <2308f718-9fcb-445f-974c-9acc9c0aa605@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_Part_3120_42272680.1466879138899" X-Trace: ger.gmane.org 1466879149 7784 80.91.229.3 (25 Jun 2016 18:25:49 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sat, 25 Jun 2016 18:25:49 +0000 (UTC) To: ISO C++ Standard - Future Proposals Original-X-From: std-proposals+bncBDLPV3M6UAHBBI4ZXO5QKGQEWW4JDUI@isocpp.org Sat Jun 25 20:25:42 2016 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-yw0-f200.google.com ([209.85.161.200]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1bGsGz-00082A-Am for gclcip-std-proposals@m.gmane.org; Sat, 25 Jun 2016 20:25:41 +0200 Original-Received: by mail-yw0-f200.google.com with SMTP id v77sf309019190ywg.1 for ; Sat, 25 Jun 2016 11:25:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=isocpp-org.20150623.gappssmtp.com; s=20150623; h=date:from:to:message-id:in-reply-to:references:subject:mime-version :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=RBpE55BXbmVq5TpSnMarXaQj+SbgZBtz6h4fjPXDwOA=; b=uO0/X/bIMj3jt1QgS5mvVQ2ZA6HhRdi9vbJ/oxXlKDdAlfRh8Zk7Vavz9kEJj1gwQ7 6V3tbYpOjcDi/T7tJwW2219bzxggQV4ocWb865LJ/5K3mY3EY0rnZwnGOXDN54CIzpSH I8nptog7Zq67zfgEUA37+h2Wd7PZhwM5zfrQqwmUW/kfToQVSC3M0scFMkhsD9PWrhqZ DiMVenofS6BWzpanDq4jZZ49TrckSKpVuNJjKefNhR3YFXe+Qx7fAIfMfSXMI2ZRDeCi vq3Vsnx4wyhCUkdn5/gfbUyG1qIKbbDW7CD+vx619HkM0utYcNXLYOo9Tghnfj6KFYpY ubBA== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=date:from:to:message-id:in-reply-to:references:subject:mime-version :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=RBpE55BXbmVq5TpSnMarXaQj+SbgZBtz6h4fjPXDwOA=; b=c8knIhBQEgzflezdffwxcQQqXvl1sSvcX9x4V4T06AqNGpG7wGOGuZxAI0f7Ctp8O5 OT87HFiSNghyNmK4urTMRYOHwJ6mM6UV1goJEC92/z1m5JkoSKMc3Q+YwL2e71IfqUMo chDGcdi3bOA8G5wOgFZvhpTjpFGQp3mc77uUPqSq19YtIb8ePTFClpDX8K8j0bW/PPl2 D3qqriZH5jVQCFM4HajzRJCLtL0cZR1ZepadYgH0uFYrvjkWtHcYgU4NR39gAJowKaDh I4RkdJSWG3IOJDcW1roMyupR3R7UpObliJ/YlZRwIyd5bHzVsEZuzdvVRRNGw8j4rwpk Ftrg== 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:in-reply-to:references :subject:mime-version: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=RBpE55BXbmVq5TpSnMarXaQj+SbgZBtz6h4fjPXDwOA=; b=OrnqbMxvFQSJK4Kt60LSl1jv2p3Ay6pkJf/kUFBCwn/Rv35b2xW2wsmEpTWnceXgk/ U0OJ/tOgElOdS3NbaE4ycYi4B8Q1/OqHUsKi5G+STpE8J7Ywahs31sVhq1pt8eVu2qaI tD6uRlAmA0ZiK0SUA9mlU0g/IUSeNVtkF1qeuA5jQpLLHjCP59D7o8Ypm7lvI632n1rc wJg5pcJaOJLLjoqVg8l6SqZVUJrro2uP1U/4ze2o0aufnrhlJT7/ssQqa686WHkTK7tU VKx9Uu/aWkufKwirUYpdZkfVsH0e6K+c5/gcWUda1mnO09eUA7ugvhBWbBHGbRLigIEc THXg== X-Gm-Message-State: ALyK8tKpqsPxueRMAigXyd8PKBy3kVZiFy/iFCjtg1bpAHAQH3WcMaHwI1oR0oIpviy7fw== X-Received: by 10.31.172.10 with SMTP id v10mr9508082vke.14.1466879140498; Sat, 25 Jun 2016 11:25:40 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.36.57.87 with SMTP id l84ls86717ita.39.gmail; Sat, 25 Jun 2016 11:25:39 -0700 (PDT) X-Received: by 10.36.124.143 with SMTP id a137mr114913itd.9.1466879139428; Sat, 25 Jun 2016 11:25:39 -0700 (PDT) In-Reply-To: <2308f718-9fcb-445f-974c-9acc9c0aa605@isocpp.org> X-Original-Sender: I.and.my.little.friends@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:26385 Archived-At: ------=_Part_3120_42272680.1466879138899 Content-Type: multipart/alternative; boundary="----=_Part_3121_2079464929.1466879138900" ------=_Part_3121_2079464929.1466879138900 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On Sunday, June 26, 2016 at 1:56:44 AM UTC+8, Nicol Bolas wrote: > > On Saturday, June 25, 2016 at 12:14:28 PM UTC-4, Guillaume Racicot wrote: >> >> After reading P0127R1=20 >> ,= =20 >> I wondered if auto& as a template parameter is be possible too. It would= =20 >> allow things like this: >> >> template >> struct Foo { >> void display() { >> std::cout << "value: " << thing << " address: " << &thing << std >> ::endl; >> } >> }; >> >> extern int i; >> >> Foo foo; >> >> Is this thing already possible in the current proposal? >> > > No. The paper merely adds deduction of the type of non-type template=20 > parameters based on the value passed. It does not change what valid=20 > non-type template parameters can be. > > You couldn't do `template` before, so you can't do it now.=20 > We *could *do `template` before. N4594 =C2=A7 14.1[temp.param]p4 4 A non-type template-parameter shall have one of the following (optionally= =20 cv-quali=EF=AC=81ed) types: =E2=80=94 (4.1) integral or enumeration type, =E2=80=94 (4.2) pointer to object or pointer to function, *=E2=80=94 (4.3) lvalue reference to object or lvalue reference to function= ,* =E2=80=94 (4.4) pointer to member, =E2=80=94 (4.5) std::nullptr_t. > You can make it a pointer if you want, but that would require doing=20 > `Foo<*i>`. > --=20 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 e= mail to std-proposals+unsubscribe@isocpp.org. To post to this group, send email to std-proposals@isocpp.org. To view this discussion on the web visit https://groups.google.com/a/isocpp= ..org/d/msgid/std-proposals/e52a753b-cbe9-4ff0-b783-ffe4ffffb384%40isocpp.or= g. ------=_Part_3121_2079464929.1466879138900 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable


On Sunday, June 26, 2016 at 1:56:44 AM UTC+8, Nico= l Bolas wrote:

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