[LLVMbugs] [Bug 8027] New: Friend template declarations get confused by member declarations

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=8027

           Summary: Friend template declarations get confused by member
                    declarations
           Product: clang
           Version: unspecified
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: chandlerc at gmail.com
                CC: llvmbugs at cs.uiuc.edu, dgregor at apple.com


I have *no* idea if this is legit C++, but GCC accepts it, and in strange cases
even requires it when it shouldn't:

% cat t2.cc
template <typename T> struct S;

template <typename T> const S<T> operator + (S<T>, S<T>);

template <typename T> struct S {
  const S<T> operator + ();
  friend const S<T> operator + <> (S<T>, S<T>);
};

S<int> s;

% ./bin/clang -fsyntax-only t2.cc
t2.cc:7:21: error: friends can only be classes or functions
  friend const S<T> operator + <> (S<T>, S<T>);
                    ^
t2.cc:7:31: error: expected ';' at end of declaration list
  friend const S<T> operator + <> (S<T>, S<T>);
                              ^
                              ;
2 errors generated.

It's worth noting that reversing the two 'operator +' lines inside of S's
definition fix Clang. =[

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