+ const __shared_ptr<_Tp2, _Lp>& __b) noexcept
+ {
+ typedef typename std::common_type<_Tp1*, _Tp2*>::type _CT;
+ return std::less<_CT>()(__a.get(), __b.get());
+ }
+
+ template<typename _Tp, _Lock_policy _Lp>
+ inline bool
+ operator<(const __shared_ptr<_Tp, _Lp>& __a, nullptr_t) noexcept
+ { return std::less<_Tp*>()(__a.get(), nullptr); }
+
+ template<typename _Tp, _Lock_policy _Lp>
+ inline bool
+ operator<(nullptr_t, const __shared_ptr<_Tp, _Lp>& __a) noexcept
+ { return std::less<_Tp*>()(nullptr, __a.get()); }
+
+ template<typename _Tp1, typename _Tp2, _Lock_policy _Lp>
+ inline bool
+ operator<=(const __shared_ptr<_Tp1, _Lp>& __a,
+ const __shared_ptr<_Tp2, _Lp>& __b) noexcept
+ { return !(__b < __a); }
+
+ template<typename _Tp, _Lock_policy _Lp>
+ inline bool
+ operator<=(const __shared_ptr<_Tp, _Lp>& __a, nullptr_t) noexcept
+ { return !(nullptr < __a); }
+
+ template<typename _Tp, _Lock_policy _Lp>
+ inline bool
+ operator<=(nullptr_t, const __shared_ptr<_Tp, _Lp>& __a) noexcept
+ { return !(__a < nullptr); }
+
+ template<typename _Tp1, typename _Tp2, _Lock_policy _Lp>
+ inline bool
+ operator>(const __shared_ptr<_Tp1, _Lp>& __a,
+ const __shared_ptr<_Tp2, _Lp>& __b) noexcept
+ { return (__b < __a); }
+
+ template<typename _Tp, _Lock_policy _Lp>
+ inline bool
+ operator>(const __shared_ptr<_Tp, _Lp>& __a, nullptr_t) noexcept
+ { return std::less<_Tp*>()(nullptr, __a.get()); }
+
+ template<typename _Tp, _Lock_policy _Lp>
+ inline bool
+ operator>(nullptr_t, const __shared_ptr<_Tp, _Lp>& __a) noexcept
+ { return std::less<_Tp*>()(__a.get(), nullptr); }
+
+ template<typename _Tp1, typename _Tp2, _Lock_policy _Lp>
+ inline bool
+ operator>=(const __shared_ptr<_Tp1, _Lp>& __a,
+ const __shared_ptr<_Tp2, _Lp>& __b) noexcept
+ { return !(__a < __b); }
+
+ template<typename _Tp, _Lock_policy _Lp>
+ inline bool
+ operator>=(const __shared_ptr<_Tp, _Lp>& __a, nullptr_t) noexcept
+ { return !(__a < nullptr); }
+
+ template<typename _Tp, _Lock_policy _Lp>
+ inline bool
+ operator>=(nullptr_t, const __shared_ptr<_Tp, _Lp>& __a) noexcept
+ { return !(nullptr < __a); }