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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - default template argument privacy"
href="http://llvm.org/bugs/show_bug.cgi?id=18079">18079</a>
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<th>Summary</th>
<td>default template argument privacy
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>3.3
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>C++
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>kusmabite@gmail.com
</td>
</tr>
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<th>CC</th>
<td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>The following code does not compile with Clang:
---8<---
template <class Bar, int Bar::*PtrToInt = &Bar::myInt>
class Foo {};
class Bar {
private:
int myInt;
public:
void FooBar()
{
// does not compile:
Foo<Bar> test;
// does compile:
// Foo<Bar, &Bar::myInt> test;
}
};
---8<---
Clang errors as follows:
---8<---
clang-issue.cpp:1:49: error: 'myInt' is a private member of 'Bar'
template <class Bar, int Bar::*PtrToInt = &Bar::myInt>
^
clang-issue.cpp:11:3: note: in instantiation of default argument for 'Foo<Bar>'
required here
Foo<Bar> test;
^~~~~~~~
clang-issue.cpp:6:6: note: declared private here
int myInt;
^
1 error generated.
---8<---
This differs from how both GCC and MSVC handles privacy of default template
arguments: it seems Clang considers privacy in the context of the template
definition in this case, whereas GCC and MSVC considers it at the call-site.
Which is correct? Since Clang differs from the two major implementations, my
guess would be that Clang was in the wrong, but I don't really know how to read
the C++ spec to be sure...</pre>
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