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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 - no matching function for call to 'f'"
   href="https://bugs.llvm.org/show_bug.cgi?id=38269">38269</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>no matching function for call to 'f'
          </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++
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>zhonghao@pku.org.cn
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>dgregor@apple.com, llvm-bugs@lists.llvm.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>The code is as follow:

template<class T, class U> struct A { };
template<class... T, class ... U> void f( A<T,U>...p);

void g() { 
 f<int>( 
 A<int,unsigned>(),
 A<short,unsigned short>() 
 );
}

clang++ rejects it:


code0.cpp:5:2: error: no matching function for call to 'f'
 f<int>( 
 ^~~~~~
code0.cpp:2:40: note: candidate template ignored: substitution failure :
      deduced incomplete pack <int, (no value)> for template parameter 'T'
template<class... T, class ... U> void f( A<T,U>...p);
                  ~                    ^
1 error generated.

g++, instead, accepts it. BTW, T shall end up as {int,short}?</pre>
        </div>
      </p>


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