<html>
<head>
<base href="http://llvm.org/bugs/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - -Wvla-extension warning incorrectly generated"
href="http://llvm.org/bugs/show_bug.cgi?id=19244">19244</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>-Wvla-extension warning incorrectly generated
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>3.4
</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>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>C++11
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>michael@ensslin.cc
</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 the following minimal example, f() incorrectly causes a warning, while g()
and h() correctly do not.
In g++, no warning is generated.
I assume that the warning is generated because LLVM doesn't notice that this->x
is constexpr.
mic@mic-nb $ cat test.cpp
struct A {
static constexpr int x = 5;
void f() {
int a[this->x]; //warning
}
void g() {
int a[x]; //no warning
}
void h() {
int a[A::x]; //no warning
}
};
mic@mic-nb $ clang++ -std=c++11 -Wvla-extension -c test.cpp
test.cpp:5:8: warning: variable length arrays are a C99 feature
[-Wvla-extension]
int a[this->x]; //warning
^
1 warning generated.</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>