<html>
    <head>
      <base href="https://bugs.llvm.org/">
    </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 - Can't access private static variable template from a friend class, in the type of a static variable template"
   href="https://bugs.llvm.org/show_bug.cgi?id=51134">51134</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Can't access private static variable template from a friend class, in the type of a static variable template
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>12.0
          </td>
        </tr>

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

        <tr>
          <th>OS</th>
          <td>Linux
          </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>blckcat@inbox.ru
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>blitzrakete@gmail.com, dgregor@apple.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Example code:
```
class A
{
    friend struct B;

    template <typename>
    static constexpr int x = 42;
};

struct B
{
    template <typename U>
    static constexpr decltype(A::template x<U>) y = 43;
};

int main()
{
    (void)B::y<int>;
}
```
This gives me `error: 'x' is a private member of 'A'`.

Removing template-ness from either variable fixes the issue. Accessing `x` from
the initializer of `y` (rather than from its type) also works.</pre>
        </div>
      </p>


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