Function f() in listing_2.6 needs extra parentheses

[demucin]

Hello,
İt does not work.
I think function declaration and object creation are mixed in function "f()" this line needs extra parentheses:

scoped_thread t(std::thread(func(some_local_state)));
should be
scoped_thread t((std::thread(func(some_local_state))));
or
scoped_thread t{std::thread(func(some_local_state))};