[LLVMbugs] [Bug 8791] New: Presence of friend member functions should be checked at template instantiation time

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=8791

           Summary: Presence of friend member functions should be checked
                    at template instantiation time
           Product: clang
           Version: trunk
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: nicolasweber at gmx.de
                CC: llvmbugs at cs.uiuc.edu, dgregor at apple.com


gcc does this, and it allows gcc to give a better diagnostic than clang:


hummer:src thakis$ cat test2.cc 
template<class T>
class C {
  friend void T::f();
};

class A {
};

void f() {
  C<A> c;
  A a;
  a.f();
}

hummer:src thakis$ gcc -c test2.cc 
test2.cc: In instantiation of ‘C<A>’:
test2.cc:10:   instantiated from here
test2.cc:3: error: no ‘void A::f()’ member function declared in class ‘A’


hummer:src thakis$ ~/src/llvm-svn/Release/bin/clang -c test2.cc 
test2.cc:12:5: error: no member named 'f' in 'A'
  a.f();
  ~ ^
1 error generated.

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