From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 25973 invoked by alias); 30 Mar 2011 07:29:02 -0000 Received: (qmail 25962 invoked by uid 22791); 30 Mar 2011 07:29:01 -0000 X-SWARE-Spam-Status: No, hits=-2.9 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00 X-Spam-Check-By: sourceware.org Received: from localhost (HELO gcc.gnu.org) (127.0.0.1) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Wed, 30 Mar 2011 07:28:58 +0000 From: "tinlyx at gmail dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/48350] make_tuple() on empty tuples does not compile X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: c++ X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: tinlyx at gmail dot com X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 Date: Wed, 30 Mar 2011 08:04:00 -0000 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org X-SW-Source: 2011-03/txt/msg03133.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48350 --- Comment #1 from tinlyx at gmail dot com 2011-03-30 07:28:55 UTC --- As a matter of fact, make_tuple() cannot be used on any tuples with cardinality other than 1. This contrasts with std::vector where we can have a vector of vectors (e.g. a matrix). A minimal example is listed below: //b.cpp #include using namespace std; int main() { //auto te = make_tuple(); //this doesn't work auto te = make_tuple(1); //this works //auto te = make_tuple(1,2); //this doesn't work auto tte = make_tuple(te); return 0; } ////////// //The compiler error message is omitted, but I can upload it if necessary.