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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - -Woverloaded-shift-op-parentheses warning text reverses precedence"
href="http://llvm.org/bugs/show_bug.cgi?id=21372">21372</a>
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<th>Summary</th>
<td>-Woverloaded-shift-op-parentheses warning text reverses precedence
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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
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<th>Status</th>
<td>NEW
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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>-New Bugs
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>mitza@ociweb.com
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
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<p>
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<pre>Version is 3.5.0 but Bugzilla doesn't let me select it.
-Woverloaded-shift-op-parentheses tells me:
warning: overloaded operator >> has lower precedence than comparison operator
No, it has higher precedence. See
<a href="http://en.cppreference.com/w/cpp/language/operator_precedence">http://en.cppreference.com/w/cpp/language/operator_precedence</a> and Matt's
comments from
<a href="http://lists.cs.uiuc.edu/pipermail/cfe-commits/Week-of-Mon-20130506/079687.html">http://lists.cs.uiuc.edu/pipermail/cfe-commits/Week-of-Mon-20130506/079687.html</a>
This warning is biased to std::iostreams usage
stream << something == other
really does deserve a warning. The particular code I'm looking at is not
std::istream and its operator>> returns a result code, not a stream&.
if (custom_stream >> variable == 0)
This doesn't need extra parens and doesn't deserve a warning. In general, the
iostreams misuse can be constrained to operator<< since operator>> takes an
rvalue (or manipulator) so probably won't be a comparison expression.</pre>
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