[LLVMbugs] [Bug 17629] New: [-fms-extensions] Allow multiply derived types to override ambiguously named members

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=17629

            Bug ID: 17629
           Summary: [-fms-extensions] Allow multiply derived types to
                    override ambiguously named members
           Product: clang
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++11
          Assignee: unassignedclangbugs at nondot.org
          Reporter: david.majnemer at gmail.com
                CC: dgregor at apple.com, llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Consider:

struct T1 {
  virtual int Foo() = 0;
};

struct T2 {
  virtual int Foo() = 0;
};

struct T3 : public virtual T1, public virtual T2 {
  virtual int T1::Foo() { return 19; }
  virtual int T2::Foo() { return 42; }
};

MSVC allows T1::Foo and T2::Foo to be overridden.

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