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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - nested class using NSDMI fails std::is_default_constructible"
href="https://bugs.llvm.org/show_bug.cgi?id=38374">38374</a>
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<th>Summary</th>
<td>nested class using NSDMI fails std::is_default_constructible
</td>
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<th>Product</th>
<td>clang
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>All
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<th>OS</th>
<td>All
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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>rparolin@ea.com
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<th>CC</th>
<td>dgregor@apple.com, llvm-bugs@lists.llvm.org
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<pre>I'm seeing odd behavior in Clang when trying to determine if a nested class
using NSDMI is default constructible. Has anyone seen this before? I've seen
this on older versions of clang but it is reproducible on clang-trunk via
godbolt.
<a href="https://godbolt.org/g/XSC6wJ">https://godbolt.org/g/XSC6wJ</a>
The Clang AST dump claims the default-ctor exists.
`-CXXRecordDecl <line:5:5, line:10:5> line:5:12 struct inner definition
|-DefinitionData pass_in_registers aggregate standard_layout
trivially_copyable literal has_constexpr_non_copy_move_ctor
can_const_default_init
| |-DefaultConstructor exists non_trivial constexpr needs_implicit
defaulted_is_constexpr
In addition, there appears to be some wierdness where the static_asserts are
being suppressed based on their ordering. ie. The first static_assert fires
but others don't.
<a href="https://godbolt.org/g/9V7tqK">https://godbolt.org/g/9V7tqK</a></pre>
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