Upgrade to 2022-era LLVM LIBCXX

2025-05-28 00:02:28 +00:00 · 2024-05-27 02:12:27 -07:00 · 2024-05-27 02:12:27 -07:00 · 8e68384e15
commit 8e68384e15
parent 2f4ca71f26
2078 changed files with 165657 additions and 65010 deletions
--- a/third_party/libcxx/__random/cauchy_distribution.h
+++ b/third_party/libcxx/__random/cauchy_distribution.h
@ -0,0 +1,164 @@
+//===----------------------------------------------------------------------===//
+//
+// 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_CAUCHY_DISTRIBUTION_H
+#define _LIBCPP___RANDOM_CAUCHY_DISTRIBUTION_H
+
+#include <__config>
+#include <__random/is_valid.h>
+#include <__random/uniform_real_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 cauchy_distribution
+{
+public:
+    // types
+    typedef _RealType result_type;
+
+    class _LIBCPP_TEMPLATE_VIS param_type
+    {
+        result_type __a_;
+        result_type __b_;
+    public:
+        typedef cauchy_distribution distribution_type;
+
+        _LIBCPP_INLINE_VISIBILITY
+        explicit param_type(result_type __a = 0, result_type __b = 1)
+            : __a_(__a), __b_(__b) {}
+
+        _LIBCPP_INLINE_VISIBILITY
+        result_type a() const {return __a_;}
+        _LIBCPP_INLINE_VISIBILITY
+        result_type b() const {return __b_;}
+
+        friend _LIBCPP_INLINE_VISIBILITY
+            bool operator==(const param_type& __x, const param_type& __y)
+            {return __x.__a_ == __y.__a_ && __x.__b_ == __y.__b_;}
+        friend _LIBCPP_INLINE_VISIBILITY
+            bool operator!=(const param_type& __x, const param_type& __y)
+            {return !(__x == __y);}
+    };
+
+private:
+    param_type __p_;
+
+public:
+    // constructor and reset functions
+#ifndef _LIBCPP_CXX03_LANG
+    _LIBCPP_INLINE_VISIBILITY
+    cauchy_distribution() : cauchy_distribution(0) {}
+    _LIBCPP_INLINE_VISIBILITY
+    explicit cauchy_distribution(result_type __a, result_type __b = 1)
+        : __p_(param_type(__a, __b)) {}
+#else
+    _LIBCPP_INLINE_VISIBILITY
+    explicit cauchy_distribution(result_type __a = 0, result_type __b = 1)
+        : __p_(param_type(__a, __b)) {}
+#endif
+    _LIBCPP_INLINE_VISIBILITY
+    explicit cauchy_distribution(const param_type& __p)
+        : __p_(__p) {}
+    _LIBCPP_INLINE_VISIBILITY
+    void reset() {}
+
+    // generating functions
+    template<class _URNG>
+        _LIBCPP_INLINE_VISIBILITY
+        result_type operator()(_URNG& __g)
+        {return (*this)(__g, __p_);}
+    template<class _URNG> _LIBCPP_INLINE_VISIBILITY result_type operator()(_URNG& __g, const param_type& __p);
+
+    // property functions
+    _LIBCPP_INLINE_VISIBILITY
+    result_type a() const {return __p_.a();}
+    _LIBCPP_INLINE_VISIBILITY
+    result_type b() const {return __p_.b();}
+
+    _LIBCPP_INLINE_VISIBILITY
+    param_type param() const {return __p_;}
+    _LIBCPP_INLINE_VISIBILITY
+    void param(const param_type& __p) {__p_ = __p;}
+
+    _LIBCPP_INLINE_VISIBILITY
+    result_type min() const {return -numeric_limits<result_type>::infinity();}
+    _LIBCPP_INLINE_VISIBILITY
+    result_type max() const {return numeric_limits<result_type>::infinity();}
+
+    friend _LIBCPP_INLINE_VISIBILITY
+        bool operator==(const cauchy_distribution& __x,
+                        const cauchy_distribution& __y)
+        {return __x.__p_ == __y.__p_;}
+    friend _LIBCPP_INLINE_VISIBILITY
+        bool operator!=(const cauchy_distribution& __x,
+                        const cauchy_distribution& __y)
+        {return !(__x == __y);}
+};
+
+template <class _RealType>
+template<class _URNG>
+inline
+_RealType
+cauchy_distribution<_RealType>::operator()(_URNG& __g, const param_type& __p)
+{
+    static_assert(__libcpp_random_is_valid_urng<_URNG>::value, "");
+    uniform_real_distribution<result_type> __gen;
+    // purposefully let tan arg get as close to pi/2 as it wants, tan will return a finite
+    return __p.a() + __p.b() * _VSTD::tan(3.1415926535897932384626433832795 * __gen(__g));
+}
+
+template <class _CharT, class _Traits, class _RT>
+_LIBCPP_HIDE_FROM_ABI basic_ostream<_CharT, _Traits>&
+operator<<(basic_ostream<_CharT, _Traits>& __os,
+           const cauchy_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);
+    __os << __x.a() << __sp << __x.b();
+    return __os;
+}
+
+template <class _CharT, class _Traits, class _RT>
+_LIBCPP_HIDE_FROM_ABI basic_istream<_CharT, _Traits>&
+operator>>(basic_istream<_CharT, _Traits>& __is,
+           cauchy_distribution<_RT>& __x)
+{
+    typedef cauchy_distribution<_RT> _Eng;
+    typedef typename _Eng::result_type result_type;
+    typedef typename _Eng::param_type param_type;
+    __save_flags<_CharT, _Traits> __lx(__is);
+    typedef basic_istream<_CharT, _Traits> _Istream;
+    __is.flags(_Istream::dec | _Istream::skipws);
+    result_type __a;
+    result_type __b;
+    __is >> __a >> __b;
+    if (!__is.fail())
+        __x.param(param_type(__a, __b));
+    return __is;
+}
+
+_LIBCPP_END_NAMESPACE_STD
+
+_LIBCPP_POP_MACROS
+
+#endif // _LIBCPP___RANDOM_CAUCHY_DISTRIBUTION_H