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    <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 - error: no candidate function template was found for dependent friend function template specialization"
   href="https://bugs.llvm.org/show_bug.cgi?id=47521">47521</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>error: no candidate function template was found for dependent friend function template specialization
          </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>Linux
          </td>
        </tr>

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

        <tr>
          <th>Severity</th>
          <td>enhancement
          </td>
        </tr>

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

        <tr>
          <th>Component</th>
          <td>C++2a
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>tangyixuan@mail.dlut.edu.cn
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>blitzrakete@gmail.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Hi, the following code is accepted by gcc with -std=c++2a, while clang rejects
it.

$ cat s.cpp
namespace N {
        template < class A > class C {
                friend void f < A >();
        };
}

$ g++ -c -std=c++2a s.cpp
success

$ clang++ -c -std=c++2a s.cpp
s.cpp:3:22: error: no candidate function template was found for dependent
friend function template specialization
                friend void f < A >();
                            ^
1 error generated.</pre>
        </div>
      </p>


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