[Bug c++/51927] New: [C++0x] Cannot access non-static members in initializer

[Bug c++/51927] New: [C++0x] Cannot access non-static members in initializer

[gccearlyadopter@trash-mail.com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51927

             Bug #: 51927
           Summary: [C++0x] Cannot access non-static members in
                    initializer
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: gccearlyadopter@trash-mail.com


GCC47 doesn't allow to access non-static members in non-static member
initialization. The following program fails to compile with the error "invalid
use of non-static data member 'testee::l1'".

#include <iostream>
#include <functional>
using std::cout;
using std::endl;

struct testee
{
    std::function<void()> l1 = []()
    {   
        cout << "world" << endl;
    };  
    std::function<void()> l2 = [=]()
    {   
        cout << "hello " << endl;
        l1();
    };  
};

int main()
{
    testee t;
    t.l2();
}

Taking the address of l1 in the lambda expression used to initialize l2 is also
refused by GCC.

[Bug c++/51927] [C++0x] Cannot access non-static members in initializer

[gccearlyadopter@trash-mail.com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51927

--- Comment #1 from gccearlyadopter@trash-mail.com 2012-05-30 07:48:35 UTC ---
This Bug still exists in the latest GCC 4.7 release.

[Bug c++/51927] [C++0x] Cannot access non-static members in initializer

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51927

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |rejects-valid
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2012-05-30
     Ever Confirmed|0                           |1
      Known to fail|                            |4.7.1, 4.8.0

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-05-30 08:38:03 UTC ---
4.7.0 *is* the latest GCC release :)

Anyway, confirmed, the example looks valid to me.

[Bug c++/51927] [C++0x] Cannot access non-static members in initializer

[gccearlyadopter@trash-mail.com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51927

--- Comment #3 from gccearlyadopter@trash-mail.com 2012-05-30 12:34:12 UTC ---
My local GCC says "4.7.0_3". :)

[Bug c++/51927] [C++0x] Cannot access non-static members in initializer

[js at lastlog dot de]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51927

js at lastlog dot de changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |js at lastlog dot de

--- Comment #4 from js at lastlog dot de 2012-12-05 17:29:35 UTC ---
still seems to be broken in 4.7.2 :-P

but is known to be working with llvm 3.2

# make
simple.cpp: In lambda function:
simple.cpp:11:5: error: invalid use of non-static data member ‘testee::l1’
simple.cpp:15:9: error: from this location
make[2]: *** [CMakeFiles/simple.dir/simple.cpp.o] Error 1
make[1]: *** [CMakeFiles/simple.dir/all] Error 2
make: *** [all] Error 2
*** Failed ***

# g++ --version
g++ (Ubuntu/Linaro 4.7.2-11precise2) 4.7.2
Copyright (C) 2012 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

[Bug c++/51927] [C++0x] Cannot access non-static members in initializer

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51927

Paolo Carlini <paolo.carlini at oracle dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to work|                            |4.8.0, 4.9.0
      Known to fail|4.8.0                       |

--- Comment #5 from Paolo Carlini <paolo.carlini at oracle dot com> 2013-05-04 12:20:56 UTC ---
This is fixed. I'm adding the testcase and closing the report.

[Bug c++/51927] [C++0x] Cannot access non-static members in initializer

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51927

Paolo Carlini <paolo.carlini at oracle dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
             Blocks|                            |54367
         Resolution|                            |FIXED

--- Comment #6 from Paolo Carlini <paolo.carlini at oracle dot com> 2013-05-04 12:33:13 UTC ---
Done.