Defined in header
template< class Fn > class binder1st : public std::unary_function<typename
static const bool has_signaling_NaN;
std::shared_ptr<T> lock() const;
static T denorm_min();
bool operator==( const bitset<N>& rhs ) const; (1)
bitset<N>& operator&=( const bitset<N>& other );
static std::chrono::time_point<std::chrono::steady_clock> now();
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