[LLVMbugs] [Bug 9124] New: Allows using-declaration to refer to scoped enumerator

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=9124

           Summary: Allows using-declaration to refer to scoped enumerator
           Product: clang
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++0x
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: schaub.johannes at googlemail.com
                CC: llvmbugs at cs.uiuc.edu, dgregor at apple.com


Clang is supposed to reject the below, but doesn't

enum class A { B };
int main() {
  using A::B; // should be an error
}

Although the spec (N3225) doesn't say so currently (DR already filed), clang
should presumably also reject referring to an unscoped enumerator in a using
declaration: 

enum A { B };
int main() {
  using A::B; // presumably should be error too. 
}

I think best may be to forbid the using declaration of having a nested name
specifier referring to an enumeration.

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