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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - left operand of shift expression ‘(-1 << 4)’ is negative"
href="https://bugs.llvm.org/show_bug.cgi?id=38238">38238</a>
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<th>Summary</th>
<td>left operand of shift expression ‘(-1 << 4)’ is negative
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<th>Product</th>
<td>clang
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<th>Version</th>
<td>trunk
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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
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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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<th>CC</th>
<td>dgregor@apple.com, llvm-bugs@lists.llvm.org
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<pre>The code is as follow:
enum A { bit_mask = ~(-1 << 4) };
clang++ accepts it, but g++ rejects it:
code0.cpp:1:26: error: left operand of shift expression '(-1 << 4)' is negative
[-fpermissive]
enum A { bit_mask = ~(-1 << 4) };
~~~~^~~~~
code0.cpp:1:30: error: enumerator value for 'bit_mask' is not an integer
constant
enum A { bit_mask = ~(-1 << 4) };</pre>
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