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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - clang does not delete default-constructor of lambdas"
href="http://llvm.org/bugs/show_bug.cgi?id=21180">21180</a>
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<th>Summary</th>
<td>clang does not delete default-constructor of lambdas
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>C++11
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>florian.weber@sfz-bw.de
</td>
</tr>
<tr>
<th>CC</th>
<td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
</td>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Clang compiles the following code without any complaints:
template<typename T>
void fun(T) {
T instance{};
(void) instance; //disable unused-warning
}
int main() {
fun([]{});
}
According to §5.1.2, sentence 20 in the C++14-standard:
“The closure type associated with a lambda-expression has a deleted (8.4.3)
default constructor […]”
which makes the above code ill-formed.
command-line: $ clang++ -Wall -Wextra -Wpedantic -std=c++11 main.cpp
version: $ clang++ --version
clang version 3.5.0 (tags/RELEASE_350/final)
Target: x86_64-unknown-linux-gnu
Thread model: posix
(btw: the version-filed when filing a bug-report currently does not offer to
select 3.5.)</pre>
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