[Bug c++/34364] New: [4.1/4.2/4.3] class& is not known as as a class-type anymore after dynamic_cast

[Bug c++/34364] New: [4.1/4.2/4.3] class& is not known as as a class-type anymore after dynamic_cast

[rbuergel at web dot de]

The following code fails to compile
struct A {
    virtual ~A() {}; //make A polymorphic
};

struct B: public A
{
    template <typename T2>
    class C
    {
      public:
          static void f (A& a)
          {
               dynamic_cast<B&>( a ).g();
          }
    };

    void g () {}
};



... and issues the following Error message:

test.cpp: In static member function 'static void B::Update<T2>::g(A&)':
test.cpp:21: error: request for member 'g' in 'dynamic_cast<B&>(a)', which is
of non-class type 'B&'


On the other hand, it works if either C is not a template or B is a template. 

this fails for 4.1.3, 4.2.2 and 4.3.0


-- 
           Summary: [4.1/4.2/4.3] class& is not known as as a class-type
                    anymore after dynamic_cast
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: rbuergel at web dot de


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34364

[Bug c++/34364] [4.1/4.2/4.3 Regression] class& is not known as as a class-type anymore after dynamic_cast

[pinskia at gcc dot gnu dot org]

------- Comment #1 from pinskia at gcc dot gnu dot org  2007-12-08 20:23 -------
Confirmed.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
           Keywords|                            |rejects-valid
      Known to fail|                            |4.1.1 4.1.2 4.2.0 4.3.0
      Known to work|                            |4.0.2
   Last reconfirmed|0000-00-00 00:00:00         |2007-12-08 20:23:26
               date|                            |
            Summary|[4.1/4.2/4.3] class& is not |[4.1/4.2/4.3 Regression]
                   |known as as a class-type    |class& is not known as as a
                   |anymore after dynamic_cast  |class-type anymore after
                   |                            |dynamic_cast
   Target Milestone|---                         |4.1.3


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34364

[Bug c++/34364] [4.1/4.2/4.3 Regression] class& is not known as as a class-type anymore after dynamic_cast

[jakub at gcc dot gnu dot org]

------- Comment #2 from jakub at gcc dot gnu dot org  2007-12-10 22:19 -------
Testing a fix.


-- 

jakub at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |jakub at gcc dot gnu dot org
                   |dot org                     |
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2007-12-08 20:23:26         |2007-12-10 22:19:57
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34364

[Bug c++/34364] [4.1/4.2/4.3 Regression] class& is not known as as a class-type anymore after dynamic_cast

[jakub at gcc dot gnu dot org]

------- Comment #3 from jakub at gcc dot gnu dot org  2007-12-11 08:20 -------
Subject: Bug 34364

Author: jakub
Date: Tue Dec 11 08:20:15 2007
New Revision: 130770

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=130770
Log:
        PR c++/34364
        * rtti.c (build_dynamic_cast): Call convert_from_reference even for
        dynamic_cast in a template.

        * g++.dg/rtti/dyncast2.C: New test.

Added:
    trunk/gcc/testsuite/g++.dg/rtti/dyncast2.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/rtti.c
    trunk/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34364

[Bug c++/34364] [4.1/4.2 Regression] class& is not known as as a class-type anymore after dynamic_cast

[jakub at gcc dot gnu dot org]

------- Comment #4 from jakub at gcc dot gnu dot org  2007-12-11 08:37 -------
Fixed on the trunk.


-- 

jakub at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to fail|4.1.1 4.1.2 4.2.0 4.3.0     |4.1.1 4.1.2 4.2.0
      Known to work|4.0.2                       |4.0.2 4.3.0
            Summary|[4.1/4.2/4.3 Regression]    |[4.1/4.2 Regression] class&
                   |class& is not known as as a |is not known as as a class-
                   |class-type anymore after    |type anymore after
                   |dynamic_cast                |dynamic_cast


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34364

[Bug c++/34364] [4.2 Regression] class& is not known as as a class-type anymore after dynamic_cast

[jsm28 at gcc dot gnu dot org]

------- Comment #5 from jsm28 at gcc dot gnu dot org  2008-07-04 22:21 -------
Closing 4.1 branch.


-- 

jsm28 at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[4.1/4.2 Regression] class& |[4.2 Regression] class& is
                   |is not known as as a class- |not known as as a class-type
                   |type anymore after          |anymore after dynamic_cast
                   |dynamic_cast                |
   Target Milestone|4.1.3                       |4.2.5


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34364

[Bug c++/34364] [4.2 Regression] class& is not known as as a class-type anymore after dynamic_cast

[jsm28 at gcc dot gnu dot org]

------- Comment #6 from jsm28 at gcc dot gnu dot org  2009-03-31 01:39 -------
Closing 4.2 branch, fixed in 4.3.


-- 

jsm28 at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
      Known to fail|4.1.1 4.1.2 4.2.0           |4.1.1 4.1.2 4.2.0 4.2.5
         Resolution|                            |FIXED
   Target Milestone|4.2.5                       |4.3.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34364