1 files changed, 126 insertions, 0 deletions
diff --git a/contrib/llvm-project/libcxx/include/__random/lognormal_distribution.h b/contrib/llvm-project/libcxx/include/__random/lognormal_distribution.h
new file mode 100644
index 000000000000..d8724f8bc5ce
--- /dev/null
+++ b/contrib/llvm-project/libcxx/include/__random/lognormal_distribution.h
@@ -0,0 +1,126 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef _LIBCPP___RANDOM_LOGNORMAL_DISTRIBUTION_H
+#define _LIBCPP___RANDOM_LOGNORMAL_DISTRIBUTION_H
+
+#include <__config>
+#include <__random/is_valid.h>
+#include <__random/normal_distribution.h>
+#include <cmath>
+#include <iosfwd>
+#include <limits>
+
+#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
+#  pragma GCC system_header
+#endif
+
+_LIBCPP_PUSH_MACROS
+#include <__undef_macros>
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+template <class _RealType = double>
+class _LIBCPP_TEMPLATE_VIS lognormal_distribution {
+  static_assert(__libcpp_random_is_valid_realtype<_RealType>::value,
+                "RealType must be a supported floating-point type");
+
+public:
+  // types
+  typedef _RealType result_type;
+
+  class _LIBCPP_TEMPLATE_VIS param_type {
+    result_type __m_;
+    result_type __s_;
+
+  public:
+    typedef lognormal_distribution distribution_type;
+
+    _LIBCPP_HIDE_FROM_ABI explicit param_type(result_type __m = 0, result_type __s = 1) : __m_(__m), __s_(__s) {}
+
+    _LIBCPP_HIDE_FROM_ABI result_type m() const { return __m_; }
+    _LIBCPP_HIDE_FROM_ABI result_type s() const { return __s_; }
+
+    friend _LIBCPP_HIDE_FROM_ABI bool operator==(const param_type& __x, const param_type& __y) {
+      return __x.__m_ == __y.__m_ && __x.__s_ == __y.__s_;
+    }
+    friend _LIBCPP_HIDE_FROM_ABI bool operator!=(const param_type& __x, const param_type& __y) { return !(__x == __y); }
+  };
+
+private:
+  normal_distribution<result_type> __nd_;
+
+public:
+  // constructor and reset functions
+#ifndef _LIBCPP_CXX03_LANG
+  _LIBCPP_HIDE_FROM_ABI lognormal_distribution() : lognormal_distribution(0) {}
+  _LIBCPP_HIDE_FROM_ABI explicit lognormal_distribution(result_type __m, result_type __s = 1) : __nd_(__m, __s) {}
+#else
+  _LIBCPP_HIDE_FROM_ABI explicit lognormal_distribution(result_type __m = 0, result_type __s = 1) : __nd_(__m, __s) {}
+#endif
+  _LIBCPP_HIDE_FROM_ABI explicit lognormal_distribution(const param_type& __p) : __nd_(__p.m(), __p.s()) {}
+  _LIBCPP_HIDE_FROM_ABI void reset() { __nd_.reset(); }
+
+  // generating functions
+  template <class _URNG>
+  _LIBCPP_HIDE_FROM_ABI result_type operator()(_URNG& __g) {
+    return std::exp(__nd_(__g));
+  }
+
+  template <class _URNG>
+  _LIBCPP_HIDE_FROM_ABI result_type operator()(_URNG& __g, const param_type& __p) {
+    typename normal_distribution<result_type>::param_type __pn(__p.m(), __p.s());
+    return std::exp(__nd_(__g, __pn));
+  }
+
+  // property functions
+  _LIBCPP_HIDE_FROM_ABI result_type m() const { return __nd_.mean(); }
+  _LIBCPP_HIDE_FROM_ABI result_type s() const { return __nd_.stddev(); }
+
+  _LIBCPP_HIDE_FROM_ABI param_type param() const { return param_type(__nd_.mean(), __nd_.stddev()); }
+  _LIBCPP_HIDE_FROM_ABI void param(const param_type& __p) {
+    typename normal_distribution<result_type>::param_type __pn(__p.m(), __p.s());
+    __nd_.param(__pn);
+  }
+
+  _LIBCPP_HIDE_FROM_ABI result_type min() const { return 0; }
+  _LIBCPP_HIDE_FROM_ABI result_type max() const { return numeric_limits<result_type>::infinity(); }
+
+  friend _LIBCPP_HIDE_FROM_ABI bool operator==(const lognormal_distribution& __x, const lognormal_distribution& __y) {
+    return __x.__nd_ == __y.__nd_;
+  }
+  friend _LIBCPP_HIDE_FROM_ABI 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 _LIBCPP_HIDE_FROM_ABI basic_ostream<_CharT, _Traits>&
+operator<<(basic_ostream<_CharT, _Traits>& __os, const lognormal_distribution<_RT>& __x) {
+  return __os << __x.__nd_;
+}
+
+template <class _CharT, class _Traits, class _RT>
+inline _LIBCPP_HIDE_FROM_ABI basic_istream<_CharT, _Traits>&
+operator>>(basic_istream<_CharT, _Traits>& __is, lognormal_distribution<_RT>& __x) {
+  return __is >> __x.__nd_;
+}
+
+_LIBCPP_END_NAMESPACE_STD
+
+_LIBCPP_POP_MACROS
+
+#endif // _LIBCPP___RANDOM_LOGNORMAL_DISTRIBUTION_H