<html>
    <head>
      <base href="https://bugs.llvm.org/">
    </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 - [C++] Support address space in type traits"
   href="https://bugs.llvm.org/show_bug.cgi?id=45326">45326</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[C++] Support address space in type traits
          </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>enhancement
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>OpenCL
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>anastasia.stulova@arm.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>anastasia.stulova@arm.com, llvm-bugs@lists.llvm.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Removing address space from type is a useful feature. However extensions can't
be added into libcxx and OpenCL doesn't support libcxx currently anyway.

We need to find a place to add the type traits.

For removing address space we could just add this in some header:


  template <class _Tp> struct __remove_address_space { typedef _Tp type; };
  template <class _Tp> struct __remove_address_space<_Tp __generic> { typedef
_Tp type; };
  template <class _Tp> struct __remove_address_space<_Tp __global> { typedef
_Tp type; };
  template <class _Tp> struct __remove_address_space<_Tp __private> { typedef
_Tp type; };
  template <class _Tp> struct __remove_address_space<_Tp __local> { typedef _Tp
type; };
  template <class _Tp> struct __remove_address_space<_Tp __constant> { typedef
_Tp type; };

We can also use more generalized impl from <a href="https://reviews.llvm.org/D76636">https://reviews.llvm.org/D76636</a></pre>
        </div>
      </p>


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