[Bug c++/51319] New: [4.7 Regression] Eigen3 enums not accepted

[Bug c++/51319] New: [4.7 Regression] Eigen3 enums not accepted

[marc.glisse at normalesup dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51319

             Bug #: 51319
           Summary: [4.7 Regression] Eigen3 enums not accepted
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: marc.glisse@normalesup.org


This is likely related to Bug 51312 and/or Bug 51305, but let me report it just
to be sure:

template<int> struct X{};
struct Base {
        enum { a=1 };
};
struct Der : Base {
        using Base::a;
        typedef X<(int)a> Y;
};

$ g++ u.cc -c          
u.cc:7:26: error: 'using Base::a' cannot appear in a constant-expression
u.cc:7:27: error: template argument 1 is invalid

$ g++ -std=c++0x u.cc -c
u.cc:7:26: error: invalid cast from type 'Base' to type 'int'
u.cc:7:27: error: template argument 1 is invalid

[Bug c++/51319] [4.7 Regression] Eigen3 enums not accepted

[reichelt at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51319

Volker Reichelt <reichelt at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
           Keywords|                            |rejects-valid
   Last reconfirmed|                            |2011-11-29
                 CC|                            |reichelt at gcc dot gnu.org
     Ever Confirmed|0                           |1
   Target Milestone|---                         |4.7.0

--- Comment #1 from Volker Reichelt <reichelt at gcc dot gnu.org> 2011-11-29 22:18:38 UTC ---
Confirmed.

[Bug c++/51319] [4.7 Regression] Eigen3 enums not accepted

[fabien at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51319

fabien at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |fabien at gcc dot gnu.org
         Resolution|                            |DUPLICATE

--- Comment #2 from fabien at gcc dot gnu.org 2011-12-04 22:07:45 UTC ---
(In reply to comment #0)
> This is likely related to Bug 51312 and/or Bug 51305

Most likely Bug 51382 ;-)

*** This bug has been marked as a duplicate of bug 51382 ***

[Bug c++/51319] [4.7 Regression] Eigen3 enums not accepted

[fabien at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51319

--- Comment #3 from fabien at gcc dot gnu.org 2011-12-05 22:04:45 UTC ---
Author: fabien
Date: Mon Dec  5 22:04:40 2011
New Revision: 182029

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=182029
Log:
gcc/testsuite/ChangeLog

2011-12-05  Fabien Chene  <fabien@gcc.gnu.org>

    PR c++/51319
    * g++.dg/lookup/using50.C: New.
    * g++.dg/lookup/using51.C: New.

gcc/cp/ChangeLog

2011-12-05  Fabien Chene  <fabien@gcc.gnu.org>

    PR c++/51319
    * semantics.c (finish_id_expression): Strip using declarations
    early in the function.

Added:
    trunk/gcc/testsuite/g++.dg/lookup/using50.C
    trunk/gcc/testsuite/g++.dg/lookup/using51.C
Modified:
    trunk/gcc/cp/semantics.c
    trunk/gcc/testsuite/ChangeLog