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From: "jarrydb at cse dot unsw.edu.au" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/50929] New: [C++0x] Wrong function selected for overload with template and rvalue reference Date: Mon, 31 Oct 2011 05:42:00 -0000 [thread overview] Message-ID: <bug-50929-4@http.gcc.gnu.org/bugzilla/> (raw) http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50929 Bug #: 50929 Summary: [C++0x] Wrong function selected for overload with template and rvalue reference Classification: Unclassified Product: gcc Version: 4.7.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ AssignedTo: unassigned@gcc.gnu.org ReportedBy: jarrydb@cse.unsw.edu.au When choosing between a constructor A(const A& a) and template <typename T> A(T&& t) given an object of type A&, the compiler chooses the second function. For the following code: class A { public: A() : value(0) {} A(const A& rhs) : value(1) { } A(A&& rhs) : value(2) { } template <typename T> A(T&& t) : value(3) { } int value; }; int main() { A a; A b = a; return b.value; } compiled with: g++ -std=gnu++0x rvalue_deduction.cpp then running: ./a.out echo $? the output is 3 I expect the output to be 1, not 3. Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/home/jarrydb/current/soft/install-latest/libexec/gcc/x86_64-unknown-linux-gnu/4.7.0/lto-wrapper Target: x86_64-unknown-linux-gnu Configured with: /home/jarrydb/current/soft/src/gcc-git/configure --prefix=/home/jarrydb/current/soft/install-latest --disable-multilib --enable-languages=c,c++ Thread model: posix gcc version 4.7.0 20111027 (experimental) (GCC)
next reply other threads:[~2011-10-31 5:42 UTC|newest] Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top 2011-10-31 5:42 jarrydb at cse dot unsw.edu.au [this message] 2011-10-31 7:16 ` [Bug c++/50929] " daniel.kruegler at googlemail dot com 2011-10-31 7:43 ` jarrydb at cse dot unsw.edu.au 2011-10-31 8:25 ` daniel.kruegler at googlemail dot com 2011-10-31 10:10 ` jarrydb at cse dot unsw.edu.au 2011-10-31 10:18 ` daniel.kruegler at googlemail dot com 2011-10-31 10:34 ` jarrydb at cse dot unsw.edu.au 2011-10-31 10:41 ` paolo.carlini at oracle dot com 2011-10-31 11:46 ` redi at gcc dot gnu.org 2011-10-31 12:20 ` paolo.carlini at oracle dot com
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