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<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>
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<th>Summary</th>
<td>Error message when explicitly instantiating a template class via a template alias
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>All
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>C++11
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>gonzalobg88@gmail.com
</td>
</tr>
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<th>CC</th>
<td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
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<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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