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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 --- - clang could emit a better diagnostic for (invalid) out-of-class-definition of member functions"
   href="https://llvm.org/bugs/show_bug.cgi?id=25223">25223</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>clang could emit a better diagnostic for (invalid) out-of-class-definition of member functions
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>unspecified
          </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>davide@freebsd.org
          </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>template<class T>
class X {
  T f(T x) { return x; }

  T foo(void);
};


template<class T>
T X::foo(void)
{
  return f(5);
}

For the code above clang emits the following diagnostic:

 % ./clang template.cpp -o template -Wall
template.cpp:14:3: error: 'X' is not a class, namespace, or enumeration
T X::foo(void)
  ^
template.cpp:2:7: note: 'X' declared here
class X {
      ^
1 error generated.


But X is actually a class, so the error is a little bit misleading.</pre>
        </div>
      </p>
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