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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - -Wunused-lambda-capture too strict with 'this'"
href="https://bugs.llvm.org/show_bug.cgi?id=42958">42958</a>
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<th>Summary</th>
<td>-Wunused-lambda-capture too strict with 'this'
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<th>Product</th>
<td>clang
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<th>Version</th>
<td>trunk
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<th>Hardware</th>
<td>PC
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<th>OS</th>
<td>Windows NT
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>C++
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>rogero@howzatt.demon.co.uk
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<th>CC</th>
<td>blitzrakete@gmail.com, dgregor@apple.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
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<p>
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<pre>Compiler Explorer <a href="https://godbolt.org/z/57PJFq">https://godbolt.org/z/57PJFq</a>
When compiled with -Wunused-lambda-capture clang gives:
warning: lambda capture 'this' is not used
However, it is used *implicitly* by the call to impl() and removal causes an
error.
--- example.cpp ---
#include <functional>
void doit(std::function<void(int)>){}
struct S
{
template <typename T>
void impl(T, int) {}
template <typename T>
void run(T t)
{
doit([t, this](auto r) {
impl(t, r);
});
}
};
int main()
{
S s;
s.run(1);
}
--- ends ---</pre>
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