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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - template alias arguments are not marked as used when forming a template parameter kind"
href="https://bugs.llvm.org/show_bug.cgi?id=43547">43547</a>
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<th>Summary</th>
<td>template alias arguments are not marked as used when forming a template parameter kind
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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>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>C++
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>metaprogrammingtheworld@gmail.com
</td>
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<th>CC</th>
<td>blitzrakete@gmail.com, dgregor@apple.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
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<p>
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<pre>The following example does not currently cause a substitution failure (gcc also
seems to exhibit this bug):
//////////
template<class> using int_ = int;
template<class>
struct no_type {};
template<class T = int, int_<typename no_type<T>::type> = 0>
void foo() {}
int main()
{
// Why does this not fail substitution?
foo();
}
//////////
Notably, the following *does* fail substitution in gcc but not in clang:
//////////
template<class> using int_ = int;
template<class>
struct no_type {};
template<class T = int, int_<typename no_type<T>::type>* = nullptr>
void foo() {}
int main()
{
foo();
}
//////////</pre>
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