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      <base href="https://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 --- - Poor diagnostic when anonymous enum with underlying type is declared in a struct and the underlying type isn't known"
   href="https://llvm.org/bugs/show_bug.cgi?id=26249">26249</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Poor diagnostic when anonymous enum with underlying type is declared in a struct and the underlying type isn't known
          </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>All
          </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>nicolasweber@gmx.de
          </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>This has a nice diagnostic:

Nicos-MBP:llvm-build thakis$ cat enum.cc
enum : uint32_t { kNone = 0 };
Nicos-MBP:llvm-build thakis$ clang -c enum.cc -std=c++11
enum.cc:1:8: error: unknown type name 'uint32_t'
enum : uint32_t { kNone = 0 };
       ^


This makes it fairly clear that an stdint.h include is missing.  But this
doesn't:

Nicos-MBP:llvm-build thakis$ cat enum.cc
struct bla {
  enum : uint32_t { kNone = 0 };
};
Nicos-MBP:llvm-build thakis$ clang -c enum.cc -std=c++11
enum.cc:2:8: error: unnamed enumeration must be a definition
  enum : uint32_t { kNone = 0 };
       ^
enum.cc:2:3: warning: declaration does not declare anything
[-Wmissing-declarations]
  enum : uint32_t { kNone = 0 };
  ^</pre>
        </div>
      </p>
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