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    <head>
      <base href="https://llvm.org/bugs/" />
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - Microsoft extensions allow to access private methods of template base class"
   href="https://llvm.org/bugs/show_bug.cgi?id=30601">30601</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Microsoft extensions allow to access private methods of template base class
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>clang
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>trunk
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>PC
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Windows NT
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>C++
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>unassignedclangbugs@nondot.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>agutowski@google.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>dgregor@apple.com, llvm-bugs@lists.llvm.org
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>The following code shouldn't compile (method "f" is private).

$ cat test.cpp
#include <stdio.h>

template<class T>
class Base {
  void f() { printf("private Base::f()\n"); }
};

template<class T>
struct Container : Base<T> {
  void g() { f(); }
};

int main() {
  Container<char> c;
  c.g();
  return 0;
}

$ clang test.cpp -o test.exe
test.cpp:10:14: warning: use of identifier 'f' found via unqualified lookup
into dependent bases of class templates is a Microsoft extension
[-Wmicrosoft-template]
  void g() { f(); }
             ^
             this->
test.cpp:15:5: note: in instantiation of member function 'Container<char>::g'
requested here
  c.g();
    ^
test.cpp:5:8: note: must qualify identifier to find this declaration in
dependent base class
  void f() { printf("private Base::f()\n"); }
       ^
1 warning generated.

$ test.exe
private Base::f()</pre>
        </div>
      </p>
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