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    <head>
      <base href="http://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 --- - Many Objective-C __attribute__s are undocumented"
   href="http://llvm.org/bugs/show_bug.cgi?id=19128">19128</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Many Objective-C __attribute__s are undocumented
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>Documentation
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>trunk
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Macintosh
          </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>General docs
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>matt@diephouse.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvmbugs@cs.uiuc.edu
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Many Objective-C __attribute__s appear to be undocumented. It would be really
nice to have documentation so we can know exactly what they do.

Attributes I can't find documentation for:

 - objc_root_class
 - objc_arc_weak_reference_unavailable
 - objc_requires_property_definitions
 - objc_requires_super

Additionally, some are only documented in the ARC documentation. It would be
nice if all the available objc_* __attribute__s were documented in a single
place.</pre>
        </div>
      </p>
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