1 files changed, 237 insertions, 300 deletions

diff --git a/contrib/llvm-project/libcxx/include/__random/piecewise_linear_distribution.h b/contrib/llvm-project/libcxx/include/__random/piecewise_linear_distribution.h
index 895f0f2dfe94..43769dc825e6 100644
--- a/contrib/llvm-project/libcxx/include/__random/piecewise_linear_distribution.h
+++ b/contrib/llvm-project/libcxx/include/__random/piecewise_linear_distribution.h
@@ -26,349 +26,286 @@ _LIBCPP_PUSH_MACROS
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-template<class _RealType = double>
-class _LIBCPP_TEMPLATE_VIS piecewise_linear_distribution
-{
+template <class _RealType = double>
+class _LIBCPP_TEMPLATE_VIS piecewise_linear_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
-    {
-        vector<result_type> __b_;
-        vector<result_type> __densities_;
-        vector<result_type> __areas_;
-    public:
-        typedef piecewise_linear_distribution distribution_type;
-
-        _LIBCPP_HIDE_FROM_ABI param_type();
-        template<class _InputIteratorB, class _InputIteratorW>
-        _LIBCPP_HIDE_FROM_ABI param_type(_InputIteratorB __f_b, _InputIteratorB __l_b,
-                       _InputIteratorW __f_w);
-#ifndef _LIBCPP_CXX03_LANG
-        template<class _UnaryOperation>
-        _LIBCPP_HIDE_FROM_ABI param_type(initializer_list<result_type> __bl, _UnaryOperation __fw);
-#endif // _LIBCPP_CXX03_LANG
-        template<class _UnaryOperation>
-        _LIBCPP_HIDE_FROM_ABI param_type(size_t __nw, result_type __xmin, result_type __xmax,
-                       _UnaryOperation __fw);
-        _LIBCPP_HIDE_FROM_ABI param_type(param_type const&) = default;
-        _LIBCPP_HIDE_FROM_ABI param_type & operator=(const param_type& __rhs);
-
-        _LIBCPP_HIDE_FROM_ABI
-        vector<result_type> intervals() const {return __b_;}
-        _LIBCPP_HIDE_FROM_ABI
-        vector<result_type> densities() const {return __densities_;}
-
-        friend _LIBCPP_HIDE_FROM_ABI
-            bool operator==(const param_type& __x, const param_type& __y)
-            {return __x.__densities_ == __y.__densities_ && __x.__b_ == __y.__b_;}
-        friend _LIBCPP_HIDE_FROM_ABI
-            bool operator!=(const param_type& __x, const param_type& __y)
-            {return !(__x == __y);}
-
-    private:
-        _LIBCPP_HIDE_FROM_ABI void __init();
-
-        friend class piecewise_linear_distribution;
-
-        template <class _CharT, class _Traits, class _RT>
-        friend
-        basic_ostream<_CharT, _Traits>&
-        operator<<(basic_ostream<_CharT, _Traits>& __os,
-                   const piecewise_linear_distribution<_RT>& __x);
-
-        template <class _CharT, class _Traits, class _RT>
-        friend
-        basic_istream<_CharT, _Traits>&
-        operator>>(basic_istream<_CharT, _Traits>& __is,
-                   piecewise_linear_distribution<_RT>& __x);
-    };
+  // types
+  typedef _RealType result_type;
 
-private:
-    param_type __p_;
+  class _LIBCPP_TEMPLATE_VIS param_type {
+    vector<result_type> __b_;
+    vector<result_type> __densities_;
+    vector<result_type> __areas_;
 
-public:
-    // constructor and reset functions
-    _LIBCPP_HIDE_FROM_ABI
-    piecewise_linear_distribution() {}
-    template<class _InputIteratorB, class _InputIteratorW>
-        _LIBCPP_HIDE_FROM_ABI
-        piecewise_linear_distribution(_InputIteratorB __f_b,
-                                      _InputIteratorB __l_b,
-                                      _InputIteratorW __f_w)
-        : __p_(__f_b, __l_b, __f_w) {}
+  public:
+    typedef piecewise_linear_distribution distribution_type;
 
+    _LIBCPP_HIDE_FROM_ABI param_type();
+    template <class _InputIteratorB, class _InputIteratorW>
+    _LIBCPP_HIDE_FROM_ABI param_type(_InputIteratorB __f_b, _InputIteratorB __l_b, _InputIteratorW __f_w);
 #ifndef _LIBCPP_CXX03_LANG
-    template<class _UnaryOperation>
-        _LIBCPP_HIDE_FROM_ABI
-        piecewise_linear_distribution(initializer_list<result_type> __bl,
-                                      _UnaryOperation __fw)
-        : __p_(__bl, __fw) {}
+    template <class _UnaryOperation>
+    _LIBCPP_HIDE_FROM_ABI param_type(initializer_list<result_type> __bl, _UnaryOperation __fw);
 #endif // _LIBCPP_CXX03_LANG
+    template <class _UnaryOperation>
+    _LIBCPP_HIDE_FROM_ABI param_type(size_t __nw, result_type __xmin, result_type __xmax, _UnaryOperation __fw);
+    _LIBCPP_HIDE_FROM_ABI param_type(param_type const&) = default;
+    _LIBCPP_HIDE_FROM_ABI param_type& operator=(const param_type& __rhs);
 
-    template<class _UnaryOperation>
-        _LIBCPP_HIDE_FROM_ABI
-        piecewise_linear_distribution(size_t __nw, result_type __xmin,
-                                      result_type __xmax, _UnaryOperation __fw)
-        : __p_(__nw, __xmin, __xmax, __fw) {}
-
-    _LIBCPP_HIDE_FROM_ABI
-    explicit piecewise_linear_distribution(const param_type& __p)
-        : __p_(__p) {}
-
-    _LIBCPP_HIDE_FROM_ABI
-    void reset() {}
-
-    // generating functions
-    template<class _URNG>
-        _LIBCPP_HIDE_FROM_ABI
-        result_type operator()(_URNG& __g)
-        {return (*this)(__g, __p_);}
-    template<class _URNG>
-    _LIBCPP_HIDE_FROM_ABI result_type operator()(_URNG& __g, const param_type& __p);
-
-    // property functions
-    _LIBCPP_HIDE_FROM_ABI
-    vector<result_type> intervals() const {return __p_.intervals();}
-    _LIBCPP_HIDE_FROM_ABI
-    vector<result_type> densities() const {return __p_.densities();}
-
-    _LIBCPP_HIDE_FROM_ABI
-    param_type param() const {return __p_;}
-    _LIBCPP_HIDE_FROM_ABI
-    void param(const param_type& __p) {__p_ = __p;}
-
-    _LIBCPP_HIDE_FROM_ABI
-    result_type min() const {return __p_.__b_.front();}
-    _LIBCPP_HIDE_FROM_ABI
-    result_type max() const {return __p_.__b_.back();}
-
-    friend _LIBCPP_HIDE_FROM_ABI
-        bool operator==(const piecewise_linear_distribution& __x,
-                        const piecewise_linear_distribution& __y)
-        {return __x.__p_ == __y.__p_;}
-    friend _LIBCPP_HIDE_FROM_ABI
-        bool operator!=(const piecewise_linear_distribution& __x,
-                        const piecewise_linear_distribution& __y)
-        {return !(__x == __y);}
+    _LIBCPP_HIDE_FROM_ABI vector<result_type> intervals() const { return __b_; }
+    _LIBCPP_HIDE_FROM_ABI vector<result_type> densities() const { return __densities_; }
+
+    friend _LIBCPP_HIDE_FROM_ABI bool operator==(const param_type& __x, const param_type& __y) {
+      return __x.__densities_ == __y.__densities_ && __x.__b_ == __y.__b_;
+    }
+    friend _LIBCPP_HIDE_FROM_ABI bool operator!=(const param_type& __x, const param_type& __y) { return !(__x == __y); }
+
+  private:
+    _LIBCPP_HIDE_FROM_ABI void __init();
+
+    friend class piecewise_linear_distribution;
 
     template <class _CharT, class _Traits, class _RT>
-    friend
-    basic_ostream<_CharT, _Traits>&
-    operator<<(basic_ostream<_CharT, _Traits>& __os,
-               const piecewise_linear_distribution<_RT>& __x);
+    friend basic_ostream<_CharT, _Traits>&
+    operator<<(basic_ostream<_CharT, _Traits>& __os, const piecewise_linear_distribution<_RT>& __x);
 
     template <class _CharT, class _Traits, class _RT>
-    friend
-    basic_istream<_CharT, _Traits>&
-    operator>>(basic_istream<_CharT, _Traits>& __is,
-               piecewise_linear_distribution<_RT>& __x);
+    friend basic_istream<_CharT, _Traits>&
+    operator>>(basic_istream<_CharT, _Traits>& __is, piecewise_linear_distribution<_RT>& __x);
+  };
+
+private:
+  param_type __p_;
+
+public:
+  // constructor and reset functions
+  _LIBCPP_HIDE_FROM_ABI piecewise_linear_distribution() {}
+  template <class _InputIteratorB, class _InputIteratorW>
+  _LIBCPP_HIDE_FROM_ABI
+  piecewise_linear_distribution(_InputIteratorB __f_b, _InputIteratorB __l_b, _InputIteratorW __f_w)
+      : __p_(__f_b, __l_b, __f_w) {}
+
+#ifndef _LIBCPP_CXX03_LANG
+  template <class _UnaryOperation>
+  _LIBCPP_HIDE_FROM_ABI piecewise_linear_distribution(initializer_list<result_type> __bl, _UnaryOperation __fw)
+      : __p_(__bl, __fw) {}
+#endif // _LIBCPP_CXX03_LANG
+
+  template <class _UnaryOperation>
+  _LIBCPP_HIDE_FROM_ABI
+  piecewise_linear_distribution(size_t __nw, result_type __xmin, result_type __xmax, _UnaryOperation __fw)
+      : __p_(__nw, __xmin, __xmax, __fw) {}
+
+  _LIBCPP_HIDE_FROM_ABI explicit piecewise_linear_distribution(const param_type& __p) : __p_(__p) {}
+
+  _LIBCPP_HIDE_FROM_ABI void reset() {}
+
+  // generating functions
+  template <class _URNG>
+  _LIBCPP_HIDE_FROM_ABI result_type operator()(_URNG& __g) {
+    return (*this)(__g, __p_);
+  }
+  template <class _URNG>
+  _LIBCPP_HIDE_FROM_ABI result_type operator()(_URNG& __g, const param_type& __p);
+
+  // property functions
+  _LIBCPP_HIDE_FROM_ABI vector<result_type> intervals() const { return __p_.intervals(); }
+  _LIBCPP_HIDE_FROM_ABI vector<result_type> densities() const { return __p_.densities(); }
+
+  _LIBCPP_HIDE_FROM_ABI param_type param() const { return __p_; }
+  _LIBCPP_HIDE_FROM_ABI void param(const param_type& __p) { __p_ = __p; }
+
+  _LIBCPP_HIDE_FROM_ABI result_type min() const { return __p_.__b_.front(); }
+  _LIBCPP_HIDE_FROM_ABI result_type max() const { return __p_.__b_.back(); }
+
+  friend _LIBCPP_HIDE_FROM_ABI bool
+  operator==(const piecewise_linear_distribution& __x, const piecewise_linear_distribution& __y) {
+    return __x.__p_ == __y.__p_;
+  }
+  friend _LIBCPP_HIDE_FROM_ABI bool
+  operator!=(const piecewise_linear_distribution& __x, const piecewise_linear_distribution& __y) {
+    return !(__x == __y);
+  }
+
+  template <class _CharT, class _Traits, class _RT>
+  friend basic_ostream<_CharT, _Traits>&
+  operator<<(basic_ostream<_CharT, _Traits>& __os, const piecewise_linear_distribution<_RT>& __x);
+
+  template <class _CharT, class _Traits, class _RT>
+  friend basic_istream<_CharT, _Traits>&
+  operator>>(basic_istream<_CharT, _Traits>& __is, piecewise_linear_distribution<_RT>& __x);
 };
 
-template<class _RealType>
-typename piecewise_linear_distribution<_RealType>::param_type &
-piecewise_linear_distribution<_RealType>::param_type::operator=
-                                                       (const param_type& __rhs)
-{
-//  These can throw
-    __b_.reserve        (__rhs.__b_.size ());
-    __densities_.reserve(__rhs.__densities_.size());
-    __areas_.reserve    (__rhs.__areas_.size());
-
-//  These can not throw
-    __b_         = __rhs.__b_;
-    __densities_ = __rhs.__densities_;
-    __areas_     =  __rhs.__areas_;
-    return *this;
+template <class _RealType>
+typename piecewise_linear_distribution<_RealType>::param_type&
+piecewise_linear_distribution<_RealType>::param_type::operator=(const param_type& __rhs) {
+  //  These can throw
+  __b_.reserve(__rhs.__b_.size());
+  __densities_.reserve(__rhs.__densities_.size());
+  __areas_.reserve(__rhs.__areas_.size());
+
+  //  These can not throw
+  __b_         = __rhs.__b_;
+  __densities_ = __rhs.__densities_;
+  __areas_     = __rhs.__areas_;
+  return *this;
 }
 
-
-template<class _RealType>
-void
-piecewise_linear_distribution<_RealType>::param_type::__init()
-{
-    __areas_.assign(__densities_.size() - 1, result_type());
-    result_type __sp = 0;
-    for (size_t __i = 0; __i < __areas_.size(); ++__i)
-    {
-        __areas_[__i] = (__densities_[__i+1] + __densities_[__i]) *
-                        (__b_[__i+1] - __b_[__i]) * .5;
-        __sp += __areas_[__i];
-    }
-    for (size_t __i = __areas_.size(); __i > 1;)
-    {
-        --__i;
-        __areas_[__i] = __areas_[__i-1] / __sp;
-    }
-    __areas_[0] = 0;
-    for (size_t __i = 1; __i < __areas_.size(); ++__i)
-        __areas_[__i] += __areas_[__i-1];
-    for (size_t __i = 0; __i < __densities_.size(); ++__i)
-        __densities_[__i] /= __sp;
+template <class _RealType>
+void piecewise_linear_distribution<_RealType>::param_type::__init() {
+  __areas_.assign(__densities_.size() - 1, result_type());
+  result_type __sp = 0;
+  for (size_t __i = 0; __i < __areas_.size(); ++__i) {
+    __areas_[__i] = (__densities_[__i + 1] + __densities_[__i]) * (__b_[__i + 1] - __b_[__i]) * .5;
+    __sp += __areas_[__i];
+  }
+  for (size_t __i = __areas_.size(); __i > 1;) {
+    --__i;
+    __areas_[__i] = __areas_[__i - 1] / __sp;
+  }
+  __areas_[0] = 0;
+  for (size_t __i = 1; __i < __areas_.size(); ++__i)
+    __areas_[__i] += __areas_[__i - 1];
+  for (size_t __i = 0; __i < __densities_.size(); ++__i)
+    __densities_[__i] /= __sp;
 }
 
-template<class _RealType>
-piecewise_linear_distribution<_RealType>::param_type::param_type()
-    : __b_(2),
-      __densities_(2, 1.0),
-      __areas_(1, 0.0)
-{
-    __b_[1] = 1;
+template <class _RealType>
+piecewise_linear_distribution<_RealType>::param_type::param_type() : __b_(2), __densities_(2, 1.0), __areas_(1, 0.0) {
+  __b_[1] = 1;
 }
 
-template<class _RealType>
-template<class _InputIteratorB, class _InputIteratorW>
+template <class _RealType>
+template <class _InputIteratorB, class _InputIteratorW>
 piecewise_linear_distribution<_RealType>::param_type::param_type(
-        _InputIteratorB __f_b, _InputIteratorB __l_b, _InputIteratorW __f_w)
-    : __b_(__f_b, __l_b)
-{
-    if (__b_.size() < 2)
-    {
-        __b_.resize(2);
-        __b_[0] = 0;
-        __b_[1] = 1;
-        __densities_.assign(2, 1.0);
-        __areas_.assign(1, 0.0);
-    }
-    else
-    {
-        __densities_.reserve(__b_.size());
-        for (size_t __i = 0; __i < __b_.size(); ++__i, ++__f_w)
-            __densities_.push_back(*__f_w);
-        __init();
-    }
+    _InputIteratorB __f_b, _InputIteratorB __l_b, _InputIteratorW __f_w)
+    : __b_(__f_b, __l_b) {
+  if (__b_.size() < 2) {
+    __b_.resize(2);
+    __b_[0] = 0;
+    __b_[1] = 1;
+    __densities_.assign(2, 1.0);
+    __areas_.assign(1, 0.0);
+  } else {
+    __densities_.reserve(__b_.size());
+    for (size_t __i = 0; __i < __b_.size(); ++__i, ++__f_w)
+      __densities_.push_back(*__f_w);
+    __init();
+  }
 }
 
 #ifndef _LIBCPP_CXX03_LANG
 
-template<class _RealType>
-template<class _UnaryOperation>
+template <class _RealType>
+template <class _UnaryOperation>
 piecewise_linear_distribution<_RealType>::param_type::param_type(
-        initializer_list<result_type> __bl, _UnaryOperation __fw)
-    : __b_(__bl.begin(), __bl.end())
-{
-    if (__b_.size() < 2)
-    {
-        __b_.resize(2);
-        __b_[0] = 0;
-        __b_[1] = 1;
-        __densities_.assign(2, 1.0);
-        __areas_.assign(1, 0.0);
-    }
-    else
-    {
-        __densities_.reserve(__b_.size());
-        for (size_t __i = 0; __i < __b_.size(); ++__i)
-            __densities_.push_back(__fw(__b_[__i]));
-        __init();
-    }
+    initializer_list<result_type> __bl, _UnaryOperation __fw)
+    : __b_(__bl.begin(), __bl.end()) {
+  if (__b_.size() < 2) {
+    __b_.resize(2);
+    __b_[0] = 0;
+    __b_[1] = 1;
+    __densities_.assign(2, 1.0);
+    __areas_.assign(1, 0.0);
+  } else {
+    __densities_.reserve(__b_.size());
+    for (size_t __i = 0; __i < __b_.size(); ++__i)
+      __densities_.push_back(__fw(__b_[__i]));
+    __init();
+  }
 }
 
 #endif // _LIBCPP_CXX03_LANG
 
-template<class _RealType>
-template<class _UnaryOperation>
+template <class _RealType>
+template <class _UnaryOperation>
 piecewise_linear_distribution<_RealType>::param_type::param_type(
-        size_t __nw, result_type __xmin, result_type __xmax, _UnaryOperation __fw)
-    : __b_(__nw == 0 ? 2 : __nw + 1)
-{
-    size_t __n = __b_.size() - 1;
-    result_type __d = (__xmax - __xmin) / __n;
-    __densities_.reserve(__b_.size());
-    for (size_t __i = 0; __i < __n; ++__i)
-    {
-        __b_[__i] = __xmin + __i * __d;
-        __densities_.push_back(__fw(__b_[__i]));
-    }
-    __b_[__n] = __xmax;
-    __densities_.push_back(__fw(__b_[__n]));
-    __init();
+    size_t __nw, result_type __xmin, result_type __xmax, _UnaryOperation __fw)
+    : __b_(__nw == 0 ? 2 : __nw + 1) {
+  size_t __n      = __b_.size() - 1;
+  result_type __d = (__xmax - __xmin) / __n;
+  __densities_.reserve(__b_.size());
+  for (size_t __i = 0; __i < __n; ++__i) {
+    __b_[__i] = __xmin + __i * __d;
+    __densities_.push_back(__fw(__b_[__i]));
+  }
+  __b_[__n] = __xmax;
+  __densities_.push_back(__fw(__b_[__n]));
+  __init();
 }
 
-template<class _RealType>
-template<class _URNG>
-_RealType
-piecewise_linear_distribution<_RealType>::operator()(_URNG& __g, const param_type& __p)
-{
-    static_assert(__libcpp_random_is_valid_urng<_URNG>::value, "");
-    typedef uniform_real_distribution<result_type> _Gen;
-    result_type __u = _Gen()(__g);
-    ptrdiff_t __k = std::upper_bound(__p.__areas_.begin(), __p.__areas_.end(),
-                                      __u) - __p.__areas_.begin() - 1;
-    __u -= __p.__areas_[__k];
-    const result_type __dk = __p.__densities_[__k];
-    const result_type __dk1 = __p.__densities_[__k+1];
-    const result_type __deltad = __dk1 - __dk;
-    const result_type __bk = __p.__b_[__k];
-    if (__deltad == 0)
-        return __u / __dk + __bk;
-    const result_type __bk1 = __p.__b_[__k+1];
-    const result_type __deltab = __bk1 - __bk;
-    return (__bk * __dk1 - __bk1 * __dk +
-        std::sqrt(__deltab * (__deltab * __dk * __dk + 2 * __deltad * __u))) /
-        __deltad;
+template <class _RealType>
+template <class _URNG>
+_RealType piecewise_linear_distribution<_RealType>::operator()(_URNG& __g, const param_type& __p) {
+  static_assert(__libcpp_random_is_valid_urng<_URNG>::value, "");
+  typedef uniform_real_distribution<result_type> _Gen;
+  result_type __u = _Gen()(__g);
+  ptrdiff_t __k   = std::upper_bound(__p.__areas_.begin(), __p.__areas_.end(), __u) - __p.__areas_.begin() - 1;
+  __u -= __p.__areas_[__k];
+  const result_type __dk     = __p.__densities_[__k];
+  const result_type __dk1    = __p.__densities_[__k + 1];
+  const result_type __deltad = __dk1 - __dk;
+  const result_type __bk     = __p.__b_[__k];
+  if (__deltad == 0)
+    return __u / __dk + __bk;
+  const result_type __bk1    = __p.__b_[__k + 1];
+  const result_type __deltab = __bk1 - __bk;
+  return (__bk * __dk1 - __bk1 * __dk + std::sqrt(__deltab * (__deltab * __dk * __dk + 2 * __deltad * __u))) / __deltad;
 }
 
 template <class _CharT, class _Traits, class _RT>
 _LIBCPP_HIDE_FROM_ABI basic_ostream<_CharT, _Traits>&
-operator<<(basic_ostream<_CharT, _Traits>& __os,
-           const piecewise_linear_distribution<_RT>& __x)
-{
-    __save_flags<_CharT, _Traits> __lx(__os);
-    typedef basic_ostream<_CharT, _Traits> _OStream;
-    __os.flags(_OStream::dec | _OStream::left | _OStream::fixed |
-               _OStream::scientific);
-    _CharT __sp = __os.widen(' ');
-    __os.fill(__sp);
-    size_t __n = __x.__p_.__b_.size();
-    __os << __n;
-    for (size_t __i = 0; __i < __n; ++__i)
-        __os << __sp << __x.__p_.__b_[__i];
-    __n = __x.__p_.__densities_.size();
-    __os << __sp << __n;
-    for (size_t __i = 0; __i < __n; ++__i)
-        __os << __sp << __x.__p_.__densities_[__i];
-    __n = __x.__p_.__areas_.size();
-    __os << __sp << __n;
-    for (size_t __i = 0; __i < __n; ++__i)
-        __os << __sp << __x.__p_.__areas_[__i];
-    return __os;
+operator<<(basic_ostream<_CharT, _Traits>& __os, const piecewise_linear_distribution<_RT>& __x) {
+  __save_flags<_CharT, _Traits> __lx(__os);
+  typedef basic_ostream<_CharT, _Traits> _OStream;
+  __os.flags(_OStream::dec | _OStream::left | _OStream::fixed | _OStream::scientific);
+  _CharT __sp = __os.widen(' ');
+  __os.fill(__sp);
+  size_t __n = __x.__p_.__b_.size();
+  __os << __n;
+  for (size_t __i = 0; __i < __n; ++__i)
+    __os << __sp << __x.__p_.__b_[__i];
+  __n = __x.__p_.__densities_.size();
+  __os << __sp << __n;
+  for (size_t __i = 0; __i < __n; ++__i)
+    __os << __sp << __x.__p_.__densities_[__i];
+  __n = __x.__p_.__areas_.size();
+  __os << __sp << __n;
+  for (size_t __i = 0; __i < __n; ++__i)
+    __os << __sp << __x.__p_.__areas_[__i];
+  return __os;
 }
 
 template <class _CharT, class _Traits, class _RT>
 _LIBCPP_HIDE_FROM_ABI basic_istream<_CharT, _Traits>&
-operator>>(basic_istream<_CharT, _Traits>& __is,
-           piecewise_linear_distribution<_RT>& __x)
-{
-    typedef piecewise_linear_distribution<_RT> _Eng;
-    typedef typename _Eng::result_type result_type;
-    __save_flags<_CharT, _Traits> __lx(__is);
-    typedef basic_istream<_CharT, _Traits> _Istream;
-    __is.flags(_Istream::dec | _Istream::skipws);
-    size_t __n;
-    __is >> __n;
-    vector<result_type> __b(__n);
-    for (size_t __i = 0; __i < __n; ++__i)
-        __is >> __b[__i];
-    __is >> __n;
-    vector<result_type> __densities(__n);
-    for (size_t __i = 0; __i < __n; ++__i)
-        __is >> __densities[__i];
-    __is >> __n;
-    vector<result_type> __areas(__n);
-    for (size_t __i = 0; __i < __n; ++__i)
-        __is >> __areas[__i];
-    if (!__is.fail())
-    {
-        swap(__x.__p_.__b_, __b);
-        swap(__x.__p_.__densities_, __densities);
-        swap(__x.__p_.__areas_, __areas);
-    }
-    return __is;
+operator>>(basic_istream<_CharT, _Traits>& __is, piecewise_linear_distribution<_RT>& __x) {
+  typedef piecewise_linear_distribution<_RT> _Eng;
+  typedef typename _Eng::result_type result_type;
+  __save_flags<_CharT, _Traits> __lx(__is);
+  typedef basic_istream<_CharT, _Traits> _Istream;
+  __is.flags(_Istream::dec | _Istream::skipws);
+  size_t __n;
+  __is >> __n;
+  vector<result_type> __b(__n);
+  for (size_t __i = 0; __i < __n; ++__i)
+    __is >> __b[__i];
+  __is >> __n;
+  vector<result_type> __densities(__n);
+  for (size_t __i = 0; __i < __n; ++__i)
+    __is >> __densities[__i];
+  __is >> __n;
+  vector<result_type> __areas(__n);
+  for (size_t __i = 0; __i < __n; ++__i)
+    __is >> __areas[__i];
+  if (!__is.fail()) {
+    swap(__x.__p_.__b_, __b);
+    swap(__x.__p_.__densities_, __densities);
+    swap(__x.__p_.__areas_, __areas);
+  }
+  return __is;
 }
 
 _LIBCPP_END_NAMESPACE_STD