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    <head>
      <base href="http://llvm.org/bugs/" />
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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - unable to match template friend conversion operator in redeclaration lookup"
   href="http://llvm.org/bugs/show_bug.cgi?id=15764">15764</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>unable to match template friend conversion operator in redeclaration lookup
          </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>normal
          </td>
        </tr>

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

        <tr>
          <th>Component</th>
          <td>C++11
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>richard-llvm@metafoo.co.uk
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Clang rejects this:

template<typename T, typename U> using X = T(*)(U);
struct S { template<typename T, typename U> operator X<T,U>(); };
struct U { template<typename T, typename U> friend S::operator X<T,U>(); };

error: no function named 'operator type-parameter-0-0 (*)(struct U)' with type
'X<T, U> ()' was found in the specified scope

This code is valid; EDG and g++ accept.</pre>
        </div>
      </p>
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