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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - using-directive injects names into wrong namespace scope"
href="https://bugs.llvm.org/show_bug.cgi?id=48558">48558</a>
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<th>Summary</th>
<td>using-directive injects names into wrong namespace scope
</td>
</tr>
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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>PC
</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>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>-New Bugs
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>arthur.j.odwyer@gmail.com
</td>
</tr>
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<th>CC</th>
<td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
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<p>
<div>
<pre>// <a href="https://godbolt.org/z/8bEMfW">https://godbolt.org/z/8bEMfW</a>
struct Cat {};
struct Lion : Cat {};
namespace Outer {
namespace Inner {
namespace N1 {
int foo(Cat);
}
namespace N2 {
int test();
}
}
int foo(Lion);
int Inner::N2::test() {
using namespace Inner::N1;
return (foo)(Lion());
}
}
When Clang sees the using-directive, it seems to insert a declaration of
Outer::Inner::N1::foo(Cat) into the lowest-common-ancestor namespace of Outer
(where the definition of `Inner::N2::test()` appears) and Outer::Inner::N1.
However, it SHOULD insert the declaration into the lowest-common-ancestor
namespace of Outer::Inner::N2 (where the original declaration of `test()`
appeared) and Outer::Inner::N1.
The parens in `(foo)(Lion())` are just there to turn off ADL to simplify the
example; they're not relevant to the bug.</pre>
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