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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Incorrect expansion of macro"
href="http://llvm.org/bugs/show_bug.cgi?id=22529">22529</a>
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<th>Summary</th>
<td>Incorrect expansion of macro
</td>
</tr>
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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>Windows NT
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
</tr>
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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>eremeev@viva64.com
</td>
</tr>
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<th>CC</th>
<td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
</td>
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<th>Classification</th>
<td>Unclassified
</td>
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<p>
<div>
<pre>#define C(_line) #_line
#define _B(_line) C(_line)
#define A ""_B(__LINE__)
A
This code is expanded to
""_B(9)
while I am expecting
"""9"
Renaming the _B macro to B or inserting a space before _B seems to solve the
issue.</pre>
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