<html>
    <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 --- - wrong std::decay< const std::nullptr_t >::type"
   href="http://llvm.org/bugs/show_bug.cgi?id=18352">18352</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>wrong std::decay< const std::nullptr_t >::type
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>3.3
          </td>
        </tr>

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

        <tr>
          <th>OS</th>
          <td>MacOS X
          </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>sizov@phys.ru
          </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>#include <cstddef>
#include <type_traits>
#include <iostream>

#define test( _type ) \
    { \
        bool s1 = std::is_same< _type, typename std::decay< const _type >::type
<span class="quote">>::value; \</span >
        bool s2 = std::is_same< const _type *, typename std::decay< const _type
<span class="quote">>::type >::value; \</span >
        std::cout << s1 << " " << s2 << std::endl; \
    }

int main()
{
    // OK
    test( std::string )
    // BAD
    test( std::nullptr_t )

    // compiled by clang:
    //   1 0
    //   0 1
    // compiled by gcc48:
    //   1 0
    //   1 0
}</pre>
        </div>
      </p>
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