http://llvm.org/bugs/show_bug.cgi?id=22479
Bug ID: 22479
Summary: compiler crash when doing lambda magic
Product: clang
Version: unspecified
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: C++11
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
Classification: Unclassified
Created attachment 13813
--> http://llvm.org/bugs/attachment.cgi?id=13813&action=edit
the required attackment
Try compiling this and you'll get a crash:
#ifndef GENERIC_CIFY_HPP
# define GENERIC_CIFY_HPP
# pragma once
#include <utility>
namespace generic
{
namespace
{
template <typename F, int I, typename L, typename R, typename ...A>
inline F cify(L&& l, R (*)(A...))
{
static thread_local L l_(::std::forward<L>(l));
static thread_local bool full;
if (full)
{
l_.~L();
new (static_cast<void*>(&l_)) L(::std::forward<L>(l));
}
else
{
full = true;
}
return [](A... args) noexcept(noexcept(l_(::std::forward<A>(args)...))) {
return l_(::std::forward<A>(args)...);
};
}
}
template <typename F, int I = 0, typename L>
inline F cify(L&& l)
{
return cify<F, I>(::std::forward<L>(l), F());
}
}
#endif // GENERIC_CIFY_HPP
#include <iostream>
int main()
{
int a;
auto const f(::generic::cify<void(*)()>([a]{::std::cout << "a: " << a <<
::std::endl;}));
f();
return 0;
}
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