explicit random_device(const std::string& token = /*implementation-defined*/

template< class CharT, class Traits, class ResultType > std::basic_ostream<CharT

void operator+=( const std::valarray<T>& other );

result_type min() const;

Defined in header

static constexpr result_type max();

Defined in header

Defined in header

RealType alpha() const; (1)

void reset();