[Bug c++/50563] New: Weird syntax acceptance rules for non-static data members initialized in place (C++0x)

[Bug c++/50563] New: Weird syntax acceptance rules for non-static data members initialized in place (C++0x)

[ethouris at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50563

             Bug #: 50563
           Summary: Weird syntax acceptance rules for non-static data
                    members initialized in place (C++0x)
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: ethouris@gmail.com


In the latest version it's possible to initialize data in place.

According to the standard, non-static data members can be initialized with:

  int a = 0;

or

  int a {0};

and not with the constructor syntax:

  int a (0);

However there are probably no strict rules how the "list of variables" can be
initialized. I state that it should be normally allowed. Actually gcc accepts
the following syntax:

 int a {10}, b {20};

as well as:

 int a, b = 20;

but this one:

 int a = 10, b = 20;

ends up with the following error message:

 error: expected ‘;’ before ‘,’ token

I'm not completely sure, but it should be just strict rule: either the list of
variables syntax is not allowed when the variables are also initialized (so int
a,b=20; should fail too), or the list of variables syntax should be supported
as usual.

[Bug c++/50563] Weird syntax acceptance rules for non-static data members initialized in place (C++0x)

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50563

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

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

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-09-29 07:55:55 UTC ---
struct S1 {
  int a{10}, b{20};     // OK
};

struct S2 {
  int a, b = 20;        // OK
};

struct S3 {
  int a = 10, b = 20;   // Error
};

CCing Jason

[Bug c++/50563] [C++0x] Weird syntax acceptance rules for non-static data members initialized in place

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50563

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |miles at gnu dot org

--- Comment #2 from Paolo Carlini <paolo.carlini at oracle dot com> 2011-10-09 09:15:17 UTC ---
*** Bug 50671 has been marked as a duplicate of this bug. ***

[Bug c++/50563] [C++0x] Weird syntax acceptance rules for non-static data members initialized in place

[jason at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50563

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2011-10-13
         AssignedTo|unassigned at gcc dot       |jason at gcc dot gnu.org
                   |gnu.org                     |
     Ever Confirmed|0                           |1

[Bug c++/50563] [C++0x] Weird syntax acceptance rules for non-static data members initialized in place

[jason at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50563

--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> 2011-10-14 19:13:05 UTC ---
Author: jason
Date: Fri Oct 14 19:12:57 2011
New Revision: 180003

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=180003
Log:
    PR c++/50563
    * parser.c (cp_parser_cache_group): Handle end==CPP_COMMA.
    (cp_parser_save_nsdmi): Pass it.

Added:
    trunk/gcc/testsuite/g++.dg/cpp0x/nsdmi-list1.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/parser.c
    trunk/gcc/testsuite/ChangeLog

[Bug c++/50563] [C++0x] Weird syntax acceptance rules for non-static data members initialized in place

[jason at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50563

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |4.7.0

--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> 2011-10-14 19:21:45 UTC ---
Fixed.