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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Struct declarated by elaborated type specifier inside another struct."
href="https://bugs.llvm.org/show_bug.cgi?id=48002">48002</a>
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<th>Summary</th>
<td>Struct declarated by elaborated type specifier inside another struct.
</td>
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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>All
</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>normal
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>C++
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>anders.granlund.0@gmail.com
</td>
</tr>
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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>
<div>
<pre>Consider the following c++ program:
int main()
{
struct A
{
struct B *b;
};
using U = B;
}
Compile it with "-std=c++20 -pedantic-errors".
Clang rejects it with the following error
message: "unknown type name 'B': using U = B;".
Note that the gcc compiler correctly accepts it.
I tried to report this as a gcc bug before, but it turned out that the gcc
behaviour is correct ( see <a href="https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97569">https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97569</a>
).</pre>
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