220 32558 <27694795.c6R7qxKFE5@tjmaciei-mobl1> article Path: news.gmane.org!.POSTED!not-for-mail From: Thiago Macieira Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: relaxing rules for ternary operator. Allow incompatible types. 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[78.47.120.188]) by mx.google.com with ESMTP id b196si10097551wmd.86.2017.05.21.10.08.19 for ; Sun, 21 May 2017 10:08:19 -0700 (PDT) Received-SPF: pass (google.com: domain of thiago@macieira.org designates 78.47.120.188 as permitted sender) client-ip=78.47.120.188; Original-Received: from tjmaciei-mobl1.localnet (unknown [IPv6:2601:1c0:4501:5f9f:8466:3462:d05f:7085]) by gondolin.macieira.info (Postfix) with ESMTPSA id A494812C001 for ; Sun, 21 May 2017 10:08:18 -0700 (PDT) In-Reply-To: <99350a9e-0c6b-468d-9761-f2b2b052275e@isocpp.org> X-Original-Sender: thiago@macieira.org X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of thiago@macieira.org designates 78.47.120.188 as permitted sender) smtp.mailfrom=thiago@macieira.org 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:32558 Archived-At: On domingo, 21 de maio de 2017 02:03:45 PDT ma.kalbfuss@web.de wrote: > The code, following the ternary statement is moved into a generic lambda. > auto x = runtime_condition ? A{} : B{}; > > The generic lambda is instantiated two times, for each branch. Depending on > runtime_condition, > only one instance is executed. The statement You do realise this grows exponentially, right? auto x = runtime_condition ? A{} : B{}; auto y = runtime_condition ? C{} : D{}; auto z = runtime_condition ? E{} : F{}; x.f() + y.f() + z.f(); There are 8 different branches there to make the above work. -- Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org Software Architect - Intel Open Source Technology Center -- 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. To view this discussion on the web visit https://groups.google.com/a/isocpp.org/d/msgid/std-proposals/27694795.c6R7qxKFE5%40tjmaciei-mobl1. .