[Bug c++/60686] New: message " only declarations of constructors can be ‘explicit’ " now conflicting with C++11

[Bug c++/60686] New: message " only declarations of constructors can be ‘explicit’ " now conflicting with C++11

[a.gronchi at nextworks dot it]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60686

            Bug ID: 60686
           Summary: message " only declarations of constructors can be
                    ‘explicit’ " now conflicting with C++11
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: minor
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: a.gronchi at nextworks dot it

The error message:

error: only declarations of constructors can be ‘explicit’

today conflicts with C++11, which also allows conversion operators to be marked
explicit.

Sample code:

struct A {
        explicit operator int() const;
};
explicit inline A::operator int() const { return 1; }


Here the second occurrence of the "explicit" keyword is illegal, but the
reported error message leads one to think about GCC lacking support for
explicit conversion operators.


Reproducible with GCC 4.8.2:

Using built-in specs.
COLLECT_GCC=g++-4.8.2
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-pc-linux-gnu/4.8.2/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with:
/var/tmp/portage/sys-devel/gcc-4.8.2-r1/work/gcc-4.8.2/configure
--host=x86_64-pc-linux-gnu --build=x86_64-pc-linux-gnu --prefix=/usr
--bindir=/usr/x86_64-pc-linux-gnu/gcc-bin/4.8.2
--includedir=/usr/lib/gcc/x86_64-pc-linux-gnu/4.8.2/include
--datadir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.8.2
--mandir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.8.2/man
--infodir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.8.2/info
--with-gxx-include-dir=/usr/lib/gcc/x86_64-pc-linux-gnu/4.8.2/include/g++-v4
--with-python-dir=/share/gcc-data/x86_64-pc-linux-gnu/4.8.2/python
--enable-languages=c,c++,fortran --enable-obsolete --enable-secureplt
--disable-werror --with-system-zlib --enable-nls --without-included-gettext
--enable-checking=release --with-bugurl=https://bugs.gentoo.org/
--with-pkgversion='Gentoo 4.8.2-r1 p1.4-ssptest, pie-0.5.9-ssptest'
--enable-libstdcxx-time --enable-shared --enable-threads=posix
--enable-__cxa_atexit --enable-clocale=gnu --enable-multilib
--with-multilib-list=m32,m64 --disable-altivec --disable-fixed-point
--enable-targets=all --disable-libgcj --enable-libgomp --disable-libmudflap
--disable-libssp --enable-lto --without-cloog
Thread model: posix
gcc version 4.8.2 (Gentoo 4.8.2-r1 p1.4-ssptest, pie-0.5.9-ssptest)
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/60685] exception not caught by enclosing catch
Date: Thu, 27 Mar 2014 15:21:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id`685

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jason at gcc dot gnu.org

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
When an exception is thrown in an NSDMI we unwind the stack in
_Unwind_RaiseException but reach:

101           if (code == _URC_END_OF_STACK)
102             /* Hit end of stack with no handler found.  */
103             return _URC_END_OF_STACK;

[Bug c++/60686] message " only declarations of constructors can be ‘explicit’ " now conflicting with C++11

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60686

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |diagnostic
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2014-03-27
     Ever confirmed|0                           |1

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Confirmed, it should probably just say "only declarations can be marked
explicit"

[Bug c++/60686] message " only declarations of constructors can be ‘explicit’ " now conflicting with C++11

[paolo.carlini at oracle dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60686

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
           Assignee|unassigned at gcc dot gnu.org      |paolo.carlini at oracle dot com

--- Comment #2 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Mine.

[Bug c++/60686] message " only declarations of constructors can be ‘explicit’ " now conflicting with C++11

[paolo.carlini at oracle dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60686

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |FIXED
           Assignee|paolo.carlini at oracle dot com    |unassigned at gcc dot gnu.org
   Target Milestone|---                         |4.10.0

--- Comment #4 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Fixed for 4.10.

[Bug c++/60686] message " only declarations of constructors can be ‘explicit’ " now conflicting with C++11

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60686

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |arvo at me dot com

--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
*** Bug 65598 has been marked as a duplicate of this bug. ***