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<base href="https://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - bug with variadic class friend functions"
href="https://llvm.org/bugs/show_bug.cgi?id=25288">25288</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>bug with variadic class friend functions
</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>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>C++14
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>ryan.burn@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>The below code compiles fine with gcc and EDG, but gives this error with clang:
rnburn@localhost ~/test/friend_auto $ c++14 t.cpp
t.cpp:18:3: error: call to 'f' is ambiguous
f(a);
^
t.cpp:6:15: note: candidate function [with Qx = <int, double>]
friend auto f(A<Qx...> a);
^
t.cpp:12:6: note: candidate function [with Qx = <int, double>]
auto f(A<Qx...> a) {
^
1 error generated.
///////////////////////////////////////////////////////////////
template<class... Tx>
class A {
public:
A(int xx) : x(xx) {}
template<class... Qx>
friend auto f(A<Qx...> a);
private:
int x;
};
template<class... Qx>
auto f(A<Qx...> a) {
return a.x;
}
int main() {
A<int, double> a(22);
f(a);
return 0;
}
///////////////////////////////////////////////////////////////</pre>
</div>
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