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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - ISO C++ forbids declaration of '_Atomic' with no type"
href="https://bugs.llvm.org/show_bug.cgi?id=37922">37922</a>
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<th>Summary</th>
<td>ISO C++ forbids declaration of '_Atomic' with no type
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
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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>
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<pre>The code is as follow:
struct AtomicInt
{
_Atomic(int) Atomic;
};
AtomicInt GlobalAtomic0 = {0};
constexpr AtomicInt GlobalAtomic1 = {0};
clang++ accepts the code, but g++ rejects the code:
code0.c.cpp:3:13: error: ISO C++ forbids declaration of '_Atomic' with no type
[-fpermissive]
_Atomic(int) Atomic;
^
code0.c.cpp:3:13: error: expected ';' at end of member declaration
_Atomic(int) Atomic;
^
;
code0.c.cpp:3:15: error: 'Atomic' does not name a type; did you mean
'AtomicInt'?
_Atomic(int) Atomic;
^~~~~~
AtomicInt
code0.c.cpp:5:29: error: too many initializers for 'AtomicInt'
AtomicInt GlobalAtomic0 = {0};
^
code0.c.cpp:6:39: error: too many initializers for 'const AtomicInt'
constexpr AtomicInt GlobalAtomic1 = {0};
This code looks ill-formed, right?</pre>
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