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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - cannot initialize a variable of type A with an rvalue of type A"
href="https://bugs.llvm.org/show_bug.cgi?id=38350">38350</a>
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<th>Summary</th>
<td>cannot initialize a variable of type A with an rvalue of type A
</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>
<tr>
<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>-New Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>zhonghao@pku.org.cn
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>The code is as follow:
#include <iostream>
void test(const int *data, int dimension)
{
const int (*m)[dimension] = reinterpret_cast<const
int(*)[dimension]>(data);
for (int i = 0; i < dimension; ++i) {
for (int j = 0; j < dimension; ++j)
std::cout << m[i][j] << " ";
std::cout << std::endl;
}
}
int main()
{
int data[][2] = { {1, 2}, {3, 4} };
test(*data, 2);
return 0;
}
clang rejects the code:
error: cannot initialize a variable of type 'const int (*)[dimension]' with an
rvalue of type 'const int (*)[dimension]'
const int (*m)[dimension] = reinterpret_cast<const
int(*)[dimension]>(data);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.
gcc accepts it.
My gcc is 9.0.0 and my clang is 7.0.0.</pre>
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</p>
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