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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - compilation error when parameters have certain complexity"
href="https://bugs.llvm.org/show_bug.cgi?id=38294">38294</a>
</td>
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<th>Summary</th>
<td>compilation error when parameters have certain complexity
</td>
</tr>
<tr>
<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>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>
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<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<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:
#define MAX(a,b) ((a) > (b) ? (a) : (b))
template<int W, bool S>
class mc_int {
template<int W2, bool S2>
mc_int<MAX(W+(S2&&!S),W2+(S&&!S2))+1, false> operator +(const mc_int<W2,S2>&
x) const;
};
typedef mc_int<6,false> ch_t;
template <int footemplate>
void foo_function(ch_t A, ch_t B, ch_t *C)
{
A + B;
}
clang++ rejects it:
code2.cpp:11:4: error: 'operator+' is a private member of 'mc_int<6, false>'
A + B;
~ ^ ~
code2.cpp:5:47: note: implicitly declared private here
mc_int<MAX(W+(S2&&!S),W2+(S&&!S2))+1, false> operator +(const mc_int<W2...
^
1 error generated.
g++ accepts it without any warnings.</pre>
</div>
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