Jonathan Wakely 8db7a05fd7 PR libstdc++/69724 avoid temporary in std::thread construction ... The std::thread constructor creates (and then moves) an unnecessary temporary copy of each argument. Optimize it to only make the one copy that is required. PR libstdc++/69724 * include/std/thread (thread::_State_impl, thread::_S_make_state): Replace single _Callable parameter with variadic _Args pack, to forward them directly to the tuple of decayed copies. * testsuite/30_threads/thread/cons/69724.cc: New test. From-SVN: r271166		2019-05-14 13:01:15 +01:00
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cons	PR libstdc++/69724 avoid temporary in std::thread construction	2019-05-14 13:01:15 +01:00
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