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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 --- - [-cxx-abi microsoft] Mangle declarations extern "C" functions when nested inside of namespaces properly"
   href="http://llvm.org/bugs/show_bug.cgi?id=17161">17161</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[-cxx-abi microsoft] Mangle declarations extern "C" functions when nested inside of namespaces properly
          </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>LLVM Codegen
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>david.majnemer@gmail.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>consider:
namespace test0 {
extern "C" inline void *fun0() {
  struct A;
  struct B {
    static void *fun() {
      static int A::* g;
      return (void *)&g;
    }
  };
  return B::fun();
};
void *h() { return fun0(); }
}

should be mangled as:
?g@?3??fun@B@?1??fun0@@9@SAPEAXXZ@4PEQA@?1??3@9@HEQ4?1??3@9@


when PR17157 is fixed, we get:
?g@?3??fun@B@?1??fun0@test0@@9@SAPEAXXZ@4PEQA@?1??34@9@HEQ5?1??34@9@

Note how we mangle the "test0" into the name of the static. We should pretend
that extern "C" functions live at top-most scope in such cases.
Fun fact: This is not the case for template arguments where namespace scope
suddenly matters.</pre>
        </div>
      </p>
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