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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 - An unfixed bug?"
href="https://bugs.llvm.org/show_bug.cgi?id=37822">37822</a>
</td>
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<tr>
<th>Summary</th>
<td>An unfixed bug?
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<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>C++
</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>dgregor@apple.com, llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>The code is as follow:
template<bool, typename> struct enable_if {};
template<typename T> struct enable_if<true,T> {
typedef T type;
};
template<typename _Tp, int _Nm> struct array {
void at(int n) {
_M_check<_Nm>(n);
}
template<int _Mm> typename enable_if<_Mm, void>::type _M_check(int) const { }
// template<int _Mm> typename enable_if<_Mm!=0, void>::type _M_check(int)
const { }
};
int main(){
array<double,3> a;
a.at(0);
}
It comes from a previous bug report: <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - no implicit conversion in template values"
href="show_bug.cgi?id=8650">https://bugs.llvm.org/show_bug.cgi?id=8650</a>
It is said to be fixed. However, when I compile the above code with the latest
clang++, it produces the following errors:
/home/haozhong/project/approach/otherreport/llvm/tmp/llvm_8650/code0.c.cpp:7:2:
error: no matching member function for call to '_M_check'
_M_check<_Nm>(n);
^~~~~~~~~~~~~
/home/haozhong/project/approach/otherreport/llvm/tmp/llvm_8650/code0.c.cpp:14:4:
note: in instantiation of member function 'array<double, 3>::at' requested here
a.at(0);
^
/home/haozhong/project/approach/otherreport/llvm/tmp/llvm_8650/code0.c.cpp:9:56:
note: candidate template ignored: substitution failure [with _Mm = 3]: non-type
template argument evaluates to 3, which cannot be narrowed to type 'bool'
template<int _Mm> typename enable_if<_Mm, void>::type _M_check(int) const
{ }
~~~ ^
1 error generated.
Is the bug not fully fixed?</pre>
</div>
</p>
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