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From: "piotr.wyderski at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/55338] New: Incorrectly reported error in type name hiding
Date: Thu, 15 Nov 2012 11:02:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D55338

             Bug #: 55338
           Summary: Incorrectly reported error in type name hiding
    Classification: Unclassified
           Product: gcc
           Version: 4.7.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: piotr.wyderski@gmail.com


The following snippet:

class A {};
class B : public A {

   typedef A super;

public:

   class X {};
};


class C : public B {

   typedef B super;

   class X : public super::X {

      typedef super::X super;
   };
};

compiles without a warning on Comeau and MSVC, but GCC (4.6.1 and
4.7.1) failes with the following message:

$ gcc -c bug.cpp
bug.cpp:18:24: error: declaration of =E2=80=98typedef class B::X C::X::supe=
r=E2=80=99
[-fpermissive]
bug.cpp:14:14: error: changes meaning of =E2=80=98super=E2=80=99 from =E2=
=80=98typedef class B
C::super=E2=80=99 [-fpermissive]

To my understanding of the Standard Comeau is right and GCC is wrong here.