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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - No diagnostic for address of bit-field result of pre-increment operator"
href="http://llvm.org/bugs/show_bug.cgi?id=20496">20496</a>
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<th>Summary</th>
<td>No diagnostic for address of bit-field result of pre-increment operator
</td>
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<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>All
</td>
</tr>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>C++
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>hstong@ca.ibm.com
</td>
</tr>
<tr>
<th>CC</th>
<td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
</td>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>N3290 subclause 5.3.2 [expr.pre.incr] paragraph 1 indicates that the result of
the prefix increment is a bit-field in the source below.
N3290 subclause 5.3.1 [expr.unary.op] paragraph 5 states that the operand of &
shall not be a bit-field.
### SOURCE:
$ cat addrBit.cc
struct S { int a : 1; } s;
int *p = &++s.a;
### COMPILER INVOCATION AND OUTPUT:
$ clang++ -cc1 -std=c++11 -pedantic-errors -Wall -Wextra addrBit.cc; echo rc=$?
rc=0
### EXPECTED OUTPUT:
addrBit.cc:2:10: error: address of bit-field requested
int *p = &++s.a;
^ ~~~
1 error generated.
rc=1
### COMPILER VERSION INFO:
$ clang++ -v
clang version 3.5.0 (trunk 214060)
Target: x86_64-unknown-linux-gnu
Thread model: posix
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8.2
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9.0
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8
Candidate multilib: .;@m64
Selected multilib: .;@m64</pre>
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