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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Type Traits with an empty parameter pack crashes. Also skip arity checks"
href="https://bugs.llvm.org/show_bug.cgi?id=50494">50494</a>
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<th>Summary</th>
<td>Type Traits with an empty parameter pack crashes. Also skip arity checks
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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
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<th>Status</th>
<td>NEW
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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>erich.keane@intel.com
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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>See this for example:
<a href="https://godbolt.org/z/G8onvPEqM">https://godbolt.org/z/G8onvPEqM</a>
template<typename ...Ts>
bool foo() {
return __is_pointer(Ts...);
}
void instant() {
foo<int>(); // #1
foo<int, int*>(); // #2
foo<>(); // #3
}
#1 works correctly.
#2 should probably emit a diagnostic, since now there are two parameters to a
Unary type trait.
#3 should probably ALSO emit a diagnostic, since there are NO parameters to a
unary type trait.</pre>
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