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[2607:f8b0:4001:c0b::231]) by mx.google.com with ESMTPS id z80si4989441ioz.49.2017.03.28.10.29.55 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 28 Mar 2017 10:29:55 -0700 (PDT) Received-SPF: pass (google.com: domain of mwoehlke.floss@gmail.com designates 2607:f8b0:4001:c0b::231 as permitted sender) client-ip=2607:f8b0:4001:c0b::231; Original-Received: by mail-it0-x231.google.com with SMTP id 76so14519162itj.0 for ; Tue, 28 Mar 2017 10:29:55 -0700 (PDT) X-Received: by 10.107.182.9 with SMTP id g9mr25348804iof.233.1490722195343; Tue, 28 Mar 2017 10:29:55 -0700 (PDT) Original-Received: from [192.168.1.176] (tripoint.kitware.com. [66.194.253.20]) by smtp.googlemail.com with ESMTPSA id y124sm1813413itd.19.2017.03.28.10.29.54 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 28 Mar 2017 10:29:54 -0700 (PDT) Original-Newsgroups: gmane.comp.lang.c++.isocpp.proposals In-Reply-To: <8028901.3vRB6vfJZY@tjmaciei-mobl1> X-Original-Sender: mwoehlke.floss@gmail.com X-Original-Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com; spf=pass (google.com: domain of mwoehlke.floss@gmail.com designates 2607:f8b0:4001:c0b::231 as permitted sender) smtp.mailfrom=mwoehlke.floss@gmail.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=gmail.com Precedence: list Mailing-list: list std-proposals@isocpp.org; contact std-proposals+owners@isocpp.org List-ID: 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:31830 Archived-At: On 2017-03-28 13:03, Thiago Macieira wrote: > On ter=C3=A7a-feira, 28 de mar=C3=A7o de 2017 09:53:51 PDT Zhihao Yuan wr= ote: >> auto [__, __] =3D get_tuple(...); >> >> should be physically equivalent to >> >> get_tuple(...); >> >> thus, the result object is dropped on the floor. >=20 > This should be equivalent to: >=20 > auto __ =3D get_tuple(...); I would argue it should be equivalent to: auto __magic__ =3D get_tuple(...); // note: same as today auto __ =3D get<0>(__magic__); auto __ =3D get<1>(__magic__); ....so that in case of side effects, there is no observable behavior difference. (The compiler is free to elide bits of the above if there are provably no side effects.) This almost makes me think we need "unnamed" and "ignored" to be implemented separately :'(... --=20 Matthew --=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/58DA9D90.6020207%40gmail.com. .