[Bug c++/55017] New: [C++11] Rvalue-reference member should cause copy constructor not deleted, but still declared

[Bug c++/55017] New: [C++11] Rvalue-reference member should cause copy constructor not deleted, but still declared

[daniel.kruegler at googlemail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55017

             Bug #: 55017
           Summary: [C++11] Rvalue-reference member should cause copy
                    constructor not deleted, but still declared
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: daniel.kruegler@googlemail.com


Using gcc 4.8.0 20121014 (experimental) with the compiler flags

-Wall -pedantic -std=c++11

the following code is incorrectly accepted:

//----------------------
struct S {
  int&& rr;
  S(int&& rr) : rr(static_cast<int&&>(rr)) {}
};

S s1(13);
S s2 = s1; // Should be rejected
//----------------------

This code should be rejected, because a non-static rvalue-reference member
causes the copy-constructor to be deleted as of 12.8 p11 b5. (Note: Even though
12.8 is currently under investigation bei CWG, there are no intentions to
change this part of the wording)

[Bug c++/55017] [C++11] Rvalue-reference member should cause copy constructor to be deleted, but still declared

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55017

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2012-10-22
            Summary|[C++11] Rvalue-reference    |[C++11] Rvalue-reference
                   |member should cause copy    |member should cause copy
                   |constructor not deleted,    |constructor to be deleted,
                   |but still declared          |but still declared
     Ever Confirmed|0                           |1

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-10-22 08:28:26 UTC ---
Confirmed, not a regression

[Bug c++/55017] [C++11] Rvalue-reference member should cause copy constructor to be deleted, but still declared

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55017

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |wlodzimierz.lipert at gmail
                   |                            |dot com

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> 2013-02-14 20:47:27 UTC ---
*** Bug 56319 has been marked as a duplicate of this bug. ***

[Bug c++/55017] [DR 1051] [C++11] Rvalue-reference member should cause copy constructor to be deleted, but still declared

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55017

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[C++11] Rvalue-reference    |[DR 1051] [C++11]
                   |member should cause copy    |Rvalue-reference member
                   |constructor to be deleted,  |should cause copy
                   |but still declared          |constructor to be deleted,
                   |                            |but still declared

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> 2013-02-14 20:48:50 UTC ---
http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#1051

[Bug c++/55017] [DR 1051] [C++11] Rvalue-reference member should cause copy constructor to be deleted, but still declared

[jason at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55017

Jason Merrill <jason at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
         AssignedTo|unassigned at gcc dot       |jason at gcc dot gnu.org
                   |gnu.org                     |

--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> 2013-02-15 19:35:40 UTC ---
Created attachment 29476
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29476
p

Patch waiting for 4.8 to branch.

[Bug c++/55017] [DR 1051] [C++11] Rvalue-reference member should cause copy constructor to be deleted, but still declared

[jason at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55017

--- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> 2013-03-17 02:35:18 UTC ---
Author: jason
Date: Sun Mar 17 02:35:01 2013
New Revision: 196728

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=196728
Log:
    PR c++/55017
    * method.c (walk_field_subobs): Disallow copy of rvalue ref.

Added:
    trunk/gcc/testsuite/g++.dg/cpp0x/rv-copy1.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/method.c
    trunk/libstdc++-v3/ChangeLog
    trunk/libstdc++-v3/testsuite/20_util/pair/piecewise2.cc

[Bug c++/55017] [DR 1051] [C++11] Rvalue-reference member should cause copy constructor to be deleted, but still declared

[jason at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55017

Jason Merrill <jason at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |4.9.0

--- Comment #6 from Jason Merrill <jason at gcc dot gnu.org> 2013-04-01 21:06:42 UTC ---
Fixed for 4.9.