[llvm-bugs] [Bug 47520] New: clang reports an error: no member a class defination

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=47520

            Bug ID: 47520
           Summary: clang reports an error: no member a class defination
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: C++
          Assignee: unassignedclangbugs at nondot.org
          Reporter: tangyixuan at mail.dlut.edu.cn
                CC: blitzrakete at gmail.com, dgregor at apple.com,
                    erik.pilkington at gmail.com, llvm-bugs at lists.llvm.org,
                    richard-llvm at metafoo.co.uk

Hi, the following code is rejected by clang, while is accepted by gcc.

$ cat s.cpp

template < class T1 > class C1{
        class C2{ class C3;};
};
template < class T1 > class C1< T1 >:: C2:: C3{
        public : int a ;
        public : void f (){
                         C1< T1 >:: E ();
                 };
};

$ g++ -c s.cpp
success.

$ clang++ -c s.cpp
s.cpp:7:16: error: no member named 'E' in 'C1<T1>'
                         C1< T1 >:: E ();
                         ~~~~~~~~~~ ^
1 error generated.

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