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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - attribute((constructor)) accepts enum class as integer constan"
href="https://bugs.llvm.org/show_bug.cgi?id=38235">38235</a>
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<th>Summary</th>
<td>attribute((constructor)) accepts enum class as integer constan
</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>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>enhancement
</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>zhonghao@pku.org.cn
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</tr>
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<th>CC</th>
<td>dgregor@apple.com, llvm-bugs@lists.llvm.org
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<p>
<div>
<pre>The code is as follow:
enum class E : int { prio = 666 };
void f (int) __attribute__((constructor(E::prio)));
It is accepted by clang++ whereas the conversion should require an explicit
cast. default_conversion -> decay_conversion -> decl_constant_value_safe
returns:
<integer_cst 0x7ffff662efc0 type <enumeral_type 0x7ffff6624b28 E> constant 666>
and we then accept any integer_cst.
Instead, g++ rejects the code:
error: constructor priorities must be integers from 0 to 65535 inclusive
void f (int) __attribute__((constructor(E::prio)));
^</pre>
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