std::atomic_flag::atomic_flag
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                    < cpp | atomic | atomic flag
                    
                                                            
                    | Defined in header  <atomic> | ||
| atomic_flag(); | (1) | (since C++11) | 
| atomic_flag( const atomic_flag& ) = delete; | (2) | (since C++11) | 
Constructs a new std::atomic_flag.
1) Trivial default constructor, initializes std::atomic_flag to unspecified state.
2) The copy constructor is deleted; std::atomic_flag is not copyable.
In addition, std::atomic_flag can be value-initialized to clear state with the expression ATOMIC_FLAG_INIT. For an atomic_flag with static storage duration, this guarantees that the values of this flag is known before any constructors are run for static objects.
[edit] Exceptions
1) 
noexcept specification:  
noexcept
  [edit] See also
| (C++11) | initializes an std::atomic_flag to false (macro constant) | 


