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      <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 --- - Error message when explicitly instantiating a template class via a template alias"
   href="http://llvm.org/bugs/show_bug.cgi?id=20531">20531</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Error message when explicitly instantiating a template class via a template alias
          </td>
        </tr>

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

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

        <tr>
          <th>Hardware</th>
          <td>All
          </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>C++11
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>gonzalobg88@gmail.com
          </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>The following code snippet:

template<class T>
struct A { };

/// Explicit instantiate A for int:
template struct A<int>;

/// Alias
template<class T>
using B = A<T>;

/// Explicitly instantiate A for double via alias B:
template struct B<double>;

Produces the following error:

error: elaborated type refers to a non-tag type

This made me scratch my head a bit since "explicitly instantiating a template
class via a template alias is illegal" but the message didn't convey me that
information [0]. 


[0]
<a href="http://stackoverflow.com/questions/25118191/explicitly-instantiate-class-through-template-alias?noredirect=1#comment39093221_25118191">http://stackoverflow.com/questions/25118191/explicitly-instantiate-class-through-template-alias?noredirect=1#comment39093221_25118191</a></pre>
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