[LLVMbugs] [Bug 18269] New: using-declaration for a name declared previously via a using-declaration introducing a non-typedef class/enumeration name

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=18269

            Bug ID: 18269
           Summary: using-declaration for a name declared previously via a
                    using-declaration introducing a non-typedef
                    class/enumeration name
           Product: clang
           Version: trunk
          Hardware: Other
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++
          Assignee: unassignedclangbugs at nondot.org
          Reporter: hstong at ca.ibm.com
                CC: dgregor at apple.com, llvmbugs at cs.uiuc.edu
    Classification: Unclassified

It seems Clang has a bad check for whether the first using-declaration in the
case below introduces a class name or enumeration name that is not a typedef
name.

SOURCE:
int A;
namespace Type {  struct A;  }

void f5() {
  using Type::A;
  using ::A;
}

OUTPUT:
cltybad.cc:6:11: error: target of using declaration conflicts with declaration
already in scope
  using ::A;
          ^
cltybad.cc:1:5: note: target of using declaration
int A;
    ^
cltybad.cc:5:15: note: conflicting declaration
  using Type::A;
              ^
1 error generated.

VERSION INFORMATION:
clang version 3.5
Target: powerpc64-unknown-linux-gnu
Thread model: posix

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