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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - clang rejects valid c++ code"
href="https://bugs.llvm.org/show_bug.cgi?id=47233">47233</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>clang rejects valid c++ code
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</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>tangyixuan@mail.dlut.edu.cn
</td>
</tr>
<tr>
<th>CC</th>
<td>blitzrakete@gmail.com, dgregor@apple.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
</td>
</tr></table>
<p>
<div>
<pre>Please consider the following code, g++ compiles it successfully, while clang++
reports two errors:
$ cat s.C
#include <valarray>
#include <iostream>
using namespace std;
template<class Value>
class T
{
const long &dim;
public:
T(const double &_dim) : dim(_dim)
{}
};
int main(int argc, char *argv[])
{
long dim = 10;
T< valarray<double> > factory(dim);
}
$ clang++ -c s.C
s.C:10:31: error: reference member 'dim' binds to a temporary object whose
lifetime would be shorter than the lifetime of the constructed object
T(const double &_dim) : dim(_dim)
^~~~
s.C:8:15: note: reference member declared here
const long &dim;
^
s.C:10:31: error: reference member 'dim' binds to a temporary object whose
lifetime would be shorter than the lifetime of the constructed object
T(const double &_dim) : dim(_dim)
^~~~
s.C:16:25: note: in instantiation of member function 'T<std::valarray<double>
<span class="quote">>::T' requested here</span >
T< valarray<double> > factory(dim);
^
s.C:8:15: note: reference member declared here
const long &dim;
^
2 errors generated.</pre>
</div>
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