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<base href="http://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Pointer-to-member conversion to bool considered indistinguishable from conversion to non-bool"
href="http://llvm.org/bugs/show_bug.cgi?id=19808">19808</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Pointer-to-member conversion to bool considered indistinguishable from conversion to non-bool
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>3.4
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>C++
</td>
</tr>
<tr>
<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>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>In C++03 subclause 13.3.3.2 [over.ics.rank] paragraph 4:
A conversion that is not a conversion of a pointer, or pointer to member, to
bool is better than another conversion that is such a conversion.
The source below demonstrates that Clang does not apply this rule to
conversions from pointer to members.
GCC and ICC does not have this problem.
###SOURCE:> cat ptomConvRanking.cc
struct B { };
struct D : public B { };
extern int B::*pbm;
int f(bool b);
int f(int D::*);
int main(void) {
f(pbm);
}
Return: 0x00:0
### COMPILER INVOCATION AND OUTPUT:> clang++ -std=c++03 ptomConvRanking.cc -c
ptomConvRanking.cc:9:4: error: call to 'f' is ambiguous
f(pbm);
^
ptomConvRanking.cc:5:5: note: candidate function
int f(bool b);
^
ptomConvRanking.cc:6:5: note: candidate function
int f(int D::*);
^
1 error generated.
Return: 0x01:1
### EXPECTED OUTPUT:> g++ -std=c++03 ptomConvRanking.cc -c
Return: 0x00:0
### VERSION INFO:> clang++ -v
clang version 3.4
Target: powerpc64-unknown-linux-gnu
Thread model: posix
Found candidate GCC installation: /usr/lib/gcc/ppc64-redhat-linux/4.4.4
Found candidate GCC installation: /usr/lib/gcc/ppc64-redhat-linux/4.4.6
Selected GCC installation: /usr/lib/gcc/ppc64-redhat-linux/4.4.6
Return: 0x00:0</pre>
</div>
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