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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Default template arguments and friend declarations don't mix"
href="https://llvm.org/bugs/show_bug.cgi?id=26962">26962</a>
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<th>Summary</th>
<td>Default template arguments and friend declarations don't mix
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>3.8
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
</tr>
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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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</tr>
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<th>Reporter</th>
<td>raffael@casagrande.ch
</td>
</tr>
<tr>
<th>CC</th>
<td>dgregor@apple.com, llvm-bugs@lists.llvm.org
</td>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>This is very funny behavior:
- If I call a function template once everything compiles.
- If I call the same function template in exactly the same way twice, clang
does not compile it.
Here's a very small code sample that shows the behavior:
#include <memory>
namespace hydi {
template<int>
class A
{
template<class T>
friend std::shared_ptr<A<0>> foo();
};
template<class T=double>
std::shared_ptr<A<0>> foo() {}
} // end namespace hydi
int main() {
*hydi::foo();
*hydi::foo(); // if this line is commented, everything works!
}
Compile it with: clang++ main.cpp -std=c++11</pre>
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