https://bugs.llvm.org/show_bug.cgi?id=41032
Bug ID: 41032
Summary: parameter passed to std::packaged_task byref stays
wrapped with std::reference_wrapper
Product: libc++
Version: unspecified
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: All Bugs
Assignee: unassignedclangb...@nondot.org
Reporter: kirsha...@gmail.com
CC: llvm-bugs@lists.llvm.org, mclow.li...@gmail.com
auto task = std::packaged_task<int(const std::vector<int>&)>{
[] (const auto& vec) {
// clang pass into the method std::reference_wrapper
// correct behavior should be to unwrap it
return std::accumulate(vec.get().begin(), vec.get().end(), 0);
}};
// Code above works only because of the call to 'get' to retrieve the content
of the std::reference_wrapper
// Call the task with some std::vector<int> named vec:
std::thread t = std::thread(std::move(task), std::cref(vec));
Full code:
http://coliru.stacked-crooked.com/a/cc3b2c44ef5d9834
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