c++ - std::atomic<bool> fetch_and() and fetch_or() realization -

c++11 doc defines std::atomic::fetch_or() , std::atomic::fetch_and() integral types. in way, msvc++ 2012 std::atomic<bool> not implements functions. know why?

i found solution. implement specialization std::atomic_fetch_or<bool> , std::atomic_fetch_or<and>.

namespace std {     template<>     inline bool atomic_fetch_or<bool>(std::atomic<bool>* atom, bool val)     {         bool bres = !val;         atom->compare_exchange_strong(bres, true);         return bres;     }      template<>     inline bool atomic_fetch_or_explicit<bool>(std::atomic<bool>* atom,         bool val, std::memory_order order)     {         bool bres = !val;         atom->compare_exchange_strong(bres, true, order);         return bres;     }       template<>     inline bool atomic_fetch_and<bool>(std::atomic<bool>* atom, bool val)     {         bool bres = true;         atom->compare_exchange_strong(bres, val);         return bres;     }      template<>     inline bool atomic_fetch_and_explicit<bool>(std::atomic<bool>* atom,         bool val, std::memory_order order)     {         bool bres = true;         atom->compare_exchange_strong(bres, val, order);         return bres;     } } 

unfortunately inconvenient use if built-in operators.