31     _Engine __e_;  variable
63         : __e_(__e), __n_(0) {}  in discard_block_engine()
67         : __e_(_VSTD::move(__e)), __n_(0) {}  in discard_block_engine()
70     explicit discard_block_engine(result_type __sd) : __e_(__sd), __n_(0) {}  in discard_block_engine()
76         : __e_(__q), __n_(0) {}  in __e_()  function
78     void seed() {__e_.seed(); __n_ = 0;}  in seed()
80     void seed(result_type __sd) {__e_.seed(__sd); __n_ = 0;}  in seed()
88         seed(_Sseq& __q) {__e_.seed(__q); __n_ = 0;}  in seed()
97     const _Engine& base() const _NOEXCEPT {return __e_;}  in base()
140         __e_.discard(__p - __r);  in operator()
144     return __e_();  in operator()
153     return __x.__n_ == __y.__n_ && __x.__e_ == __y.__e_;
176     return __os << __x.__e_ << __sp << __x.__n_;
193         __x.__e_ = __e;