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From: "dieter.lucking at googlemail dot com" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/52901] New: invalid rvalue reference Date: Sat, 07 Apr 2012 16:35:00 -0000 [thread overview] Message-ID: <bug-52901-4@http.gcc.gnu.org/bugzilla/> (raw) http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52901 Bug #: 52901 Summary: invalid rvalue reference Classification: Unclassified Product: gcc Version: 4.6.1 Status: UNCONFIRMED Severity: major Priority: P3 Component: c++ AssignedTo: unassigned@gcc.gnu.org ReportedBy: dieter.lucking@googlemail.com Created attachment 27111 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27111 code A different result - just reordering the cout output. #include <iostream> using namespace std; struct X { int value; X() { cout << "default construction" << std::endl; value = 0; } X(const X& other) { cout << "copy construction" << std::endl; value = 1; } X(X&& other) { cout << "move construction" << std::endl; value = 2; } X& operator = (const X& other) { cout << "assignment" << std::endl; value = 3; return *this; } }; X&& f() { X x; return std::move(x); } int main() { cout << "Hello References [1]" << std::endl; X x0 = f(); cout << "x0: " << x0.value << std::endl; X&& x1 = f(); cout << "No copy construction or assignment expected" << std::endl; cout << "x1: " << x1.value << std::endl; cout << "Hello References [2]" << std::endl; X y0 = f(); cout << "y0: " << y0.value << std::endl; X&& y1 = f(); cout << "y1: " << y1.value << std::endl; cout << "No copy construction or assignment expected" << std::endl; return 0; } // Seems g++ 4.6.1 is buggy: // Hello References [1] // default construction // move construction // x0: 2 // default construction // No copy construction or assignment expected // x1: 6295648 // Hello References [2] // default construction // move construction // y0: 2 // default construction // y1: 0 // No copy construction or assignment expected
next reply other threads:[~2012-04-07 16:35 UTC|newest] Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top 2012-04-07 16:35 dieter.lucking at googlemail dot com [this message] 2012-04-08 13:49 ` [Bug c++/52901] " daniel.kruegler at googlemail dot com 2012-04-08 14:15 ` redi at gcc dot gnu.org 2012-04-08 15:33 ` marc.glisse at normalesup dot org 2012-04-08 18:06 ` redi at gcc dot gnu.org 2012-04-08 18:09 ` redi at gcc dot gnu.org
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