[rand.dist.norm.lognormal]
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@103957 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/random b/include/random
index afed529..a1278fe 100644
--- a/include/random
+++ b/include/random
@@ -1124,7 +1124,62 @@
};
template<class RealType = double>
- class lognormal_distribution;
+class lognormal_distribution
+{
+public:
+ // types
+ typedef RealType result_type;
+
+ class param_type
+ {
+ public:
+ typedef lognormal_distribution distribution_type;
+
+ explicit param_type(result_type m = 0, result_type s = 1);
+
+ result_type m() const;
+ result_type s() const;
+
+ friend bool operator==(const param_type& x, const param_type& y);
+ friend bool operator!=(const param_type& x, const param_type& y);
+ };
+
+ // constructor and reset functions
+ explicit lognormal_distribution(result_type m = 0, result_type s = 1);
+ explicit lognormal_distribution(const param_type& parm);
+ void reset();
+
+ // generating functions
+ template<class URNG> result_type operator()(URNG& g);
+ template<class URNG> result_type operator()(URNG& g, const param_type& parm);
+
+ // property functions
+ result_type m() const;
+ result_type s() const;
+
+ param_type param() const;
+ void param(const param_type& parm);
+
+ result_type min() const;
+ result_type max() const;
+
+ friend bool operator==(const lognormal_distribution& x,
+ const lognormal_distribution& y);
+ friend bool operator!=(const lognormal_distribution& x,
+ const lognormal_distribution& y);
+
+ template <class charT, class traits>
+ friend
+ basic_ostream<charT, traits>&
+ operator<<(basic_ostream<charT, traits>& os,
+ const lognormal_distribution& x);
+
+ template <class charT, class traits>
+ friend
+ basic_istream<charT, traits>&
+ operator>>(basic_istream<charT, traits>& is,
+ lognormal_distribution& x);
+};
template<class RealType = double>
class chi_squared_distribution
@@ -3796,6 +3851,111 @@
return __is;
}
+// lognormal_distribution
+
+template<class _RealType = double>
+class lognormal_distribution
+{
+public:
+ // types
+ typedef _RealType result_type;
+
+ class param_type
+ {
+ normal_distribution<result_type> __nd_;
+ public:
+ typedef lognormal_distribution distribution_type;
+
+ explicit param_type(result_type __m = 0, result_type __s = 1)
+ : __nd_(__m, __s) {}
+
+ result_type m() const {return __nd_.mean();}
+ result_type s() const {return __nd_.stddev();}
+
+ friend bool operator==(const param_type& __x, const param_type& __y)
+ {return __x.__nd_ == __y.__nd_;}
+ friend bool operator!=(const param_type& __x, const param_type& __y)
+ {return !(__x == __y);}
+ friend class lognormal_distribution;
+
+ template <class _CharT, class _Traits, class _RT>
+ friend
+ basic_ostream<_CharT, _Traits>&
+ operator<<(basic_ostream<_CharT, _Traits>& __os,
+ const lognormal_distribution<_RT>& __x);
+
+ template <class _CharT, class _Traits, class _RT>
+ friend
+ basic_istream<_CharT, _Traits>&
+ operator>>(basic_istream<_CharT, _Traits>& __is,
+ lognormal_distribution<_RT>& __x);
+ };
+
+private:
+ param_type __p_;
+
+public:
+ // constructor and reset functions
+ explicit lognormal_distribution(result_type __m = 0, result_type __s = 1)
+ : __p_(param_type(__m, __s)) {}
+ explicit lognormal_distribution(const param_type& __p)
+ : __p_(__p) {}
+ void reset() {__p_.__nd_.reset();}
+
+ // generating functions
+ template<class _URNG> result_type operator()(_URNG& __g)
+ {return (*this)(__g, __p_);}
+ template<class _URNG> result_type operator()(_URNG& __g, const param_type& __p)
+ {return _STD::exp(const_cast<normal_distribution<result_type>&>(__p.__nd_)(__g));}
+
+ // property functions
+ result_type m() const {return __p_.m();}
+ result_type s() const {return __p_.s();}
+
+ param_type param() const {return __p_;}
+ void param(const param_type& __p) {return __p_ = __p;}
+
+ result_type min() const {return 0;}
+ result_type max() const {return numeric_limits<result_type>::infinity();}
+
+ friend bool operator==(const lognormal_distribution& __x,
+ const lognormal_distribution& __y)
+ {return __x.__p_ == __y.__p_;}
+ friend bool operator!=(const lognormal_distribution& __x,
+ const lognormal_distribution& __y)
+ {return !(__x == __y);}
+
+ template <class _CharT, class _Traits, class _RT>
+ friend
+ basic_ostream<_CharT, _Traits>&
+ operator<<(basic_ostream<_CharT, _Traits>& __os,
+ const lognormal_distribution<_RT>& __x);
+
+ template <class _CharT, class _Traits, class _RT>
+ friend
+ basic_istream<_CharT, _Traits>&
+ operator>>(basic_istream<_CharT, _Traits>& __is,
+ lognormal_distribution<_RT>& __x);
+};
+
+template <class _CharT, class _Traits, class _RT>
+inline
+basic_ostream<_CharT, _Traits>&
+operator<<(basic_ostream<_CharT, _Traits>& __os,
+ const lognormal_distribution<_RT>& __x)
+{
+ return __os << __x.__p_.__nd_;
+}
+
+template <class _CharT, class _Traits, class _RT>
+inline
+basic_istream<_CharT, _Traits>&
+operator>>(basic_istream<_CharT, _Traits>& __is,
+ lognormal_distribution<_RT>& __x)
+{
+ return __is >> __x.__p_.__nd_;
+}
+
// poisson_distribution
template<class _IntType = int>