libcxx/include/new - third_party/llvm-project - Git at Google

 // -*- C++ -*-
 //===----------------------------------------------------------------------===//
 //
 // 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_NEW
 #define _LIBCPP_NEW

 /*
     new synopsis

 namespace std
 {

 class bad_alloc
     : public exception
 {
 public:
     bad_alloc() noexcept;
     bad_alloc(const bad_alloc&) noexcept;
     bad_alloc& operator=(const bad_alloc&) noexcept;
     virtual const char* what() const noexcept;
 };

 class bad_array_new_length : public bad_alloc // C++14
 {
 public:
     bad_array_new_length() noexcept;
 };

 enum class align_val_t : size_t {}; // C++17

 struct destroying_delete_t { // C++20
   explicit destroying_delete_t() = default;
 };
 inline constexpr destroying_delete_t destroying_delete{}; // C++20

 struct nothrow_t { explicit nothrow_t() = default; };
 extern const nothrow_t nothrow;
 typedef void (*new_handler)();
 new_handler set_new_handler(new_handler new_p) noexcept;
 new_handler get_new_handler() noexcept;

 // 21.6.4, pointer optimization barrier
 template <class T> [[nodiscard]] constexpr T* launder(T* p) noexcept;   // C++17, nodiscard since C++20
 }  // std

 void* operator new(std::size_t size);                                   // replaceable, nodiscard in C++20
 void* operator new(std::size_t size, std::align_val_t alignment);       // replaceable, C++17, nodiscard in C++20
 void* operator new(std::size_t size, const std::nothrow_t&) noexcept;   // replaceable, nodiscard in C++20
 void* operator new(std::size_t size, std::align_val_t alignment,
                    const std::nothrow_t&) noexcept;                     // replaceable, C++17, nodiscard in C++20
 void  operator delete(void* ptr) noexcept;                              // replaceable
 void  operator delete(void* ptr, std::size_t size) noexcept;            // replaceable, C++14
 void  operator delete(void* ptr, std::align_val_t alignment) noexcept;  // replaceable, C++17
 void  operator delete(void* ptr, std::size_t size,
                       std::align_val_t alignment) noexcept;             // replaceable, C++17
 void  operator delete(void* ptr, const std::nothrow_t&) noexcept;       // replaceable
 void  operator delete(void* ptr, std:align_val_t alignment,
                       const std::nothrow_t&) noexcept;                  // replaceable, C++17

 void* operator new[](std::size_t size);                                 // replaceable, nodiscard in C++20
 void* operator new[](std::size_t size,
                      std::align_val_t alignment) noexcept;              // replaceable, C++17, nodiscard in C++20
 void* operator new[](std::size_t size, const std::nothrow_t&) noexcept; // replaceable, nodiscard in C++20
 void* operator new[](std::size_t size, std::align_val_t alignment,
                      const std::nothrow_t&) noexcept;                   // replaceable, C++17, nodiscard in C++20
 void  operator delete[](void* ptr) noexcept;                            // replaceable
 void  operator delete[](void* ptr, std::size_t size) noexcept;          // replaceable, C++14
 void  operator delete[](void* ptr,
                         std::align_val_t alignment) noexcept;           // replaceable, C++17
 void  operator delete[](void* ptr, std::size_t size,
                         std::align_val_t alignment) noexcept;           // replaceable, C++17
 void  operator delete[](void* ptr, const std::nothrow_t&) noexcept;     // replaceable
 void  operator delete[](void* ptr, std::align_val_t alignment,
                         const std::nothrow_t&) noexcept;                // replaceable, C++17

 void* operator new  (std::size_t size, void* ptr) noexcept;             // nodiscard in C++20, constexpr since C++26
 void* operator new[](std::size_t size, void* ptr) noexcept;             // nodiscard in C++20, constexpr since C++26
 void  operator delete  (void* ptr, void*) noexcept;
 void  operator delete[](void* ptr, void*) noexcept;

 */

 #include <__config>
 #include <__exception/exception.h>
 #include <__type_traits/is_function.h>
 #include <__type_traits/is_same.h>
 #include <__type_traits/remove_cv.h>
 #include <__verbose_abort>
 #include <cstddef>
 #include <version>

 #if defined(_LIBCPP_ABI_VCRUNTIME)
 #  include <new.h>
 #endif

 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
 #endif

 #if !defined(__cpp_sized_deallocation) || __cpp_sized_deallocation < 201309L
 #  define _LIBCPP_HAS_NO_LANGUAGE_SIZED_DEALLOCATION
 #endif

 #if !defined(_LIBCPP_BUILDING_LIBRARY) && _LIBCPP_STD_VER < 14 && defined(_LIBCPP_HAS_NO_LANGUAGE_SIZED_DEALLOCATION)
 #  define _LIBCPP_HAS_NO_LIBRARY_SIZED_DEALLOCATION
 #endif

 #if defined(_LIBCPP_HAS_NO_LIBRARY_SIZED_DEALLOCATION) || defined(_LIBCPP_HAS_NO_LANGUAGE_SIZED_DEALLOCATION)
 #  define _LIBCPP_HAS_NO_SIZED_DEALLOCATION
 #endif

 namespace std // purposefully not using versioning namespace
 {

 #if !defined(_LIBCPP_ABI_VCRUNTIME)
 struct _LIBCPP_EXPORTED_FROM_ABI nothrow_t {
   explicit nothrow_t() = default;
 };
 extern _LIBCPP_EXPORTED_FROM_ABI const nothrow_t nothrow;

 class _LIBCPP_EXPORTED_FROM_ABI bad_alloc : public exception {
 public:
   bad_alloc() _NOEXCEPT;
   _LIBCPP_HIDE_FROM_ABI bad_alloc(const bad_alloc&) _NOEXCEPT            = default;
   _LIBCPP_HIDE_FROM_ABI bad_alloc& operator=(const bad_alloc&) _NOEXCEPT = default;
   ~bad_alloc() _NOEXCEPT override;
   const char* what() const _NOEXCEPT override;
 };

 class _LIBCPP_EXPORTED_FROM_ABI bad_array_new_length : public bad_alloc {
 public:
   bad_array_new_length() _NOEXCEPT;
   _LIBCPP_HIDE_FROM_ABI bad_array_new_length(const bad_array_new_length&) _NOEXCEPT            = default;
   _LIBCPP_HIDE_FROM_ABI bad_array_new_length& operator=(const bad_array_new_length&) _NOEXCEPT = default;
   ~bad_array_new_length() _NOEXCEPT override;
   const char* what() const _NOEXCEPT override;
 };

 typedef void (*new_handler)();
 _LIBCPP_EXPORTED_FROM_ABI new_handler set_new_handler(new_handler) _NOEXCEPT;
 _LIBCPP_EXPORTED_FROM_ABI new_handler get_new_handler() _NOEXCEPT;

 #elif defined(_HAS_EXCEPTIONS) && _HAS_EXCEPTIONS == 0 // !_LIBCPP_ABI_VCRUNTIME

 // When _HAS_EXCEPTIONS == 0, these complete definitions are needed,
 // since they would normally be provided in vcruntime_exception.h
 class bad_alloc : public exception {
 public:
   bad_alloc() noexcept : exception("bad allocation") {}

 private:
   friend class bad_array_new_length;

   bad_alloc(char const* const __message) noexcept : exception(__message) {}
 };

 class bad_array_new_length : public bad_alloc {
 public:
   bad_array_new_length() noexcept : bad_alloc("bad array new length") {}
 };
 #endif // defined(_LIBCPP_ABI_VCRUNTIME) && defined(_HAS_EXCEPTIONS) && _HAS_EXCEPTIONS == 0

 _LIBCPP_NORETURN _LIBCPP_EXPORTED_FROM_ABI void __throw_bad_alloc(); // not in C++ spec

 _LIBCPP_NORETURN inline _LIBCPP_HIDE_FROM_ABI void __throw_bad_array_new_length() {
 #ifndef _LIBCPP_HAS_NO_EXCEPTIONS
   throw bad_array_new_length();
 #else
   _LIBCPP_VERBOSE_ABORT("bad_array_new_length was thrown in -fno-exceptions mode");
 #endif
 }

 #if !defined(_LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION) && !defined(_LIBCPP_ABI_VCRUNTIME)
 #  ifndef _LIBCPP_CXX03_LANG
 enum class align_val_t : size_t {};
 #  else
 enum align_val_t { __zero = 0, __max = (size_t)-1 };
 #  endif
 #endif

 #if _LIBCPP_STD_VER >= 20
 // Enable the declaration even if the compiler doesn't support the language
 // feature.
 struct destroying_delete_t {
   explicit destroying_delete_t() = default;
 };
 inline constexpr destroying_delete_t destroying_delete{};
 #endif // _LIBCPP_STD_VER >= 20

 } // namespace std

 #if defined(_LIBCPP_CXX03_LANG)
 #  define _THROW_BAD_ALLOC throw(std::bad_alloc)
 #else
 #  define _THROW_BAD_ALLOC
 #endif

 #if !defined(_LIBCPP_ABI_VCRUNTIME)

 _LIBCPP_NODISCARD _LIBCPP_OVERRIDABLE_FUNC_VIS void* operator new(std::size_t __sz) _THROW_BAD_ALLOC;
 _LIBCPP_NODISCARD _LIBCPP_OVERRIDABLE_FUNC_VIS void* operator new(std::size_t __sz, const std::nothrow_t&) _NOEXCEPT
     _LIBCPP_NOALIAS;
 _LIBCPP_OVERRIDABLE_FUNC_VIS void operator delete(void* __p) _NOEXCEPT;
 _LIBCPP_OVERRIDABLE_FUNC_VIS void operator delete(void* __p, const std::nothrow_t&) _NOEXCEPT;
 #  ifndef _LIBCPP_HAS_NO_LIBRARY_SIZED_DEALLOCATION
 _LIBCPP_OVERRIDABLE_FUNC_VIS void operator delete(void* __p, std::size_t __sz) _NOEXCEPT;
 #  endif

 _LIBCPP_NODISCARD _LIBCPP_OVERRIDABLE_FUNC_VIS void* operator new[](std::size_t __sz) _THROW_BAD_ALLOC;
 _LIBCPP_NODISCARD _LIBCPP_OVERRIDABLE_FUNC_VIS void* operator new[](std::size_t __sz, const std::nothrow_t&) _NOEXCEPT
     _LIBCPP_NOALIAS;
 _LIBCPP_OVERRIDABLE_FUNC_VIS void operator delete[](void* __p) _NOEXCEPT;
 _LIBCPP_OVERRIDABLE_FUNC_VIS void operator delete[](void* __p, const std::nothrow_t&) _NOEXCEPT;
 #  ifndef _LIBCPP_HAS_NO_LIBRARY_SIZED_DEALLOCATION
 _LIBCPP_OVERRIDABLE_FUNC_VIS void operator delete[](void* __p, std::size_t __sz) _NOEXCEPT;
 #  endif

 #  ifndef _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION
 _LIBCPP_NODISCARD _LIBCPP_OVERRIDABLE_FUNC_VIS void* operator new(std::size_t __sz, std::align_val_t) _THROW_BAD_ALLOC;
 _LIBCPP_NODISCARD _LIBCPP_OVERRIDABLE_FUNC_VIS void*
 operator new(std::size_t __sz, std::align_val_t, const std::nothrow_t&) _NOEXCEPT _LIBCPP_NOALIAS;
 _LIBCPP_OVERRIDABLE_FUNC_VIS void operator delete(void* __p, std::align_val_t) _NOEXCEPT;
 _LIBCPP_OVERRIDABLE_FUNC_VIS void operator delete(void* __p, std::align_val_t, const std::nothrow_t&) _NOEXCEPT;
 #    ifndef _LIBCPP_HAS_NO_LIBRARY_SIZED_DEALLOCATION
 _LIBCPP_OVERRIDABLE_FUNC_VIS void operator delete(void* __p, std::size_t __sz, std::align_val_t) _NOEXCEPT;
 #    endif

 _LIBCPP_NODISCARD _LIBCPP_OVERRIDABLE_FUNC_VIS void*
 operator new[](std::size_t __sz, std::align_val_t) _THROW_BAD_ALLOC;
 _LIBCPP_NODISCARD _LIBCPP_OVERRIDABLE_FUNC_VIS void*
 operator new[](std::size_t __sz, std::align_val_t, const std::nothrow_t&) _NOEXCEPT _LIBCPP_NOALIAS;
 _LIBCPP_OVERRIDABLE_FUNC_VIS void operator delete[](void* __p, std::align_val_t) _NOEXCEPT;
 _LIBCPP_OVERRIDABLE_FUNC_VIS void operator delete[](void* __p, std::align_val_t, const std::nothrow_t&) _NOEXCEPT;
 #    ifndef _LIBCPP_HAS_NO_LIBRARY_SIZED_DEALLOCATION
 _LIBCPP_OVERRIDABLE_FUNC_VIS void operator delete[](void* __p, std::size_t __sz, std::align_val_t) _NOEXCEPT;
 #    endif
 #  endif

 _LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX26 void*
 operator new(std::size_t, void* __p) _NOEXCEPT {
   return __p;
 }
 _LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX26 void*
 operator new[](std::size_t, void* __p) _NOEXCEPT {
   return __p;
 }
 inline _LIBCPP_HIDE_FROM_ABI void operator delete(void*, void*) _NOEXCEPT {}
 inline _LIBCPP_HIDE_FROM_ABI void operator delete[](void*, void*) _NOEXCEPT {}

 #endif // !_LIBCPP_ABI_VCRUNTIME

 _LIBCPP_BEGIN_NAMESPACE_STD

 _LIBCPP_CONSTEXPR inline _LIBCPP_HIDE_FROM_ABI bool __is_overaligned_for_new(size_t __align) _NOEXCEPT {
 #ifdef __STDCPP_DEFAULT_NEW_ALIGNMENT__
   return __align > __STDCPP_DEFAULT_NEW_ALIGNMENT__;
 #else
   return __align > _LIBCPP_ALIGNOF(max_align_t);
 #endif
 }

 template <class... _Args>
 _LIBCPP_HIDE_FROM_ABI void* __libcpp_operator_new(_Args... __args) {
 #if __has_builtin(__builtin_operator_new) && __has_builtin(__builtin_operator_delete)
   return __builtin_operator_new(__args...);
 #else
   return ::operator new(__args...);
 #endif
 }

 template <class... _Args>
 _LIBCPP_HIDE_FROM_ABI void __libcpp_operator_delete(_Args... __args) {
 #if __has_builtin(__builtin_operator_new) && __has_builtin(__builtin_operator_delete)
   __builtin_operator_delete(__args...);
 #else
   ::operator delete(__args...);
 #endif
 }

 inline _LIBCPP_HIDE_FROM_ABI void* __libcpp_allocate(size_t __size, size_t __align) {
 #ifndef _LIBCPP_HAS_NO_ALIGNED_ALLOCATION
   if (__is_overaligned_for_new(__align)) {
     const align_val_t __align_val = static_cast<align_val_t>(__align);
     return __libcpp_operator_new(__size, __align_val);
   }
 #endif

   (void)__align;
   return __libcpp_operator_new(__size);
 }

 template <class... _Args>
 _LIBCPP_HIDE_FROM_ABI void __do_deallocate_handle_size(void* __ptr, size_t __size, _Args... __args) {
 #ifdef _LIBCPP_HAS_NO_SIZED_DEALLOCATION
   (void)__size;
   return std::__libcpp_operator_delete(__ptr, __args...);
 #else
   return std::__libcpp_operator_delete(__ptr, __size, __args...);
 #endif
 }

 inline _LIBCPP_HIDE_FROM_ABI void __libcpp_deallocate(void* __ptr, size_t __size, size_t __align) {
 #if defined(_LIBCPP_HAS_NO_ALIGNED_ALLOCATION)
   (void)__align;
   return __do_deallocate_handle_size(__ptr, __size);
 #else
   if (__is_overaligned_for_new(__align)) {
     const align_val_t __align_val = static_cast<align_val_t>(__align);
     return __do_deallocate_handle_size(__ptr, __size, __align_val);
   } else {
     return __do_deallocate_handle_size(__ptr, __size);
   }
 #endif
 }

 inline _LIBCPP_HIDE_FROM_ABI void __libcpp_deallocate_unsized(void* __ptr, size_t __align) {
 #if defined(_LIBCPP_HAS_NO_ALIGNED_ALLOCATION)
   (void)__align;
   return __libcpp_operator_delete(__ptr);
 #else
   if (__is_overaligned_for_new(__align)) {
     const align_val_t __align_val = static_cast<align_val_t>(__align);
     return __libcpp_operator_delete(__ptr, __align_val);
   } else {
     return __libcpp_operator_delete(__ptr);
   }
 #endif
 }

 template <class _Tp>
 _LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR _Tp* __launder(_Tp* __p) _NOEXCEPT {
   static_assert(!(is_function<_Tp>::value), "can't launder functions");
   static_assert(!(is_same<void, __remove_cv_t<_Tp> >::value), "can't launder cv-void");
   return __builtin_launder(__p);
 }

 #if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 [[nodiscard]] inline _LIBCPP_HIDE_FROM_ABI constexpr _Tp* launder(_Tp* __p) noexcept {
   return std::__launder(__p);
 }
 #endif

 #if _LIBCPP_STD_VER >= 17

 #  if defined(__GCC_DESTRUCTIVE_SIZE) && defined(__GCC_CONSTRUCTIVE_SIZE)

 inline constexpr size_t hardware_destructive_interference_size  = __GCC_DESTRUCTIVE_SIZE;
 inline constexpr size_t hardware_constructive_interference_size = __GCC_CONSTRUCTIVE_SIZE;

 #  endif // defined(__GCC_DESTRUCTIVE_SIZE) && defined(__GCC_CONSTRUCTIVE_SIZE)

 #endif // _LIBCPP_STD_VER >= 17

 _LIBCPP_END_NAMESPACE_STD

 #if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
 #  include <cstdlib>
 #  include <type_traits>
 #endif

 #endif // _LIBCPP_NEW
	// -- C++ --
	//===----------------------------------------------------------------------===//
	//
	// 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_NEW
	#define _LIBCPP_NEW

	/*
	new synopsis

	namespace std
	{

	class bad_alloc
	: public exception
	{
	public:
	bad_alloc() noexcept;
	bad_alloc(const bad_alloc&) noexcept;
	bad_alloc& operator=(const bad_alloc&) noexcept;
	virtual const char* what() const noexcept;
	};

	class bad_array_new_length : public bad_alloc // C++14
	{
	public:
	bad_array_new_length() noexcept;
	};

	enum class align_val_t : size_t {}; // C++17

	struct destroying_delete_t { // C++20
	explicit destroying_delete_t() = default;
	};
	inline constexpr destroying_delete_t destroying_delete{}; // C++20

	struct nothrow_t { explicit nothrow_t() = default; };
	extern const nothrow_t nothrow;
	typedef void (*new_handler)();
	new_handler set_new_handler(new_handler new_p) noexcept;
	new_handler get_new_handler() noexcept;

	// 21.6.4, pointer optimization barrier
	template <class T> [[nodiscard]] constexpr T* launder(T* p) noexcept; // C++17, nodiscard since C++20
	} // std

	void* operator new(std::size_t size); // replaceable, nodiscard in C++20
	void* operator new(std::size_t size, std::align_val_t alignment); // replaceable, C++17, nodiscard in C++20
	void* operator new(std::size_t size, const std::nothrow_t&) noexcept; // replaceable, nodiscard in C++20
	void* operator new(std::size_t size, std::align_val_t alignment,
	const std::nothrow_t&) noexcept; // replaceable, C++17, nodiscard in C++20
	void operator delete(void* ptr) noexcept; // replaceable
	void operator delete(void* ptr, std::size_t size) noexcept; // replaceable, C++14
	void operator delete(void* ptr, std::align_val_t alignment) noexcept; // replaceable, C++17
	void operator delete(void* ptr, std::size_t size,
	std::align_val_t alignment) noexcept; // replaceable, C++17
	void operator delete(void* ptr, const std::nothrow_t&) noexcept; // replaceable
	void operator delete(void* ptr, std:align_val_t alignment,
	const std::nothrow_t&) noexcept; // replaceable, C++17

	void* operator new[](std::size_t size); // replaceable, nodiscard in C++20
	void* operator new[](std::size_t size,
	std::align_val_t alignment) noexcept; // replaceable, C++17, nodiscard in C++20
	void* operator new[](std::size_t size, const std::nothrow_t&) noexcept; // replaceable, nodiscard in C++20
	void* operator new[](std::size_t size, std::align_val_t alignment,
	const std::nothrow_t&) noexcept; // replaceable, C++17, nodiscard in C++20
	void operator delete[](void* ptr) noexcept; // replaceable
	void operator delete[](void* ptr, std::size_t size) noexcept; // replaceable, C++14
	void operator delete[](void* ptr,
	std::align_val_t alignment) noexcept; // replaceable, C++17
	void operator delete[](void* ptr, std::size_t size,
	std::align_val_t alignment) noexcept; // replaceable, C++17
	void operator delete[](void* ptr, const std::nothrow_t&) noexcept; // replaceable
	void operator delete[](void* ptr, std::align_val_t alignment,
	const std::nothrow_t&) noexcept; // replaceable, C++17

	void* operator new (std::size_t size, void* ptr) noexcept; // nodiscard in C++20, constexpr since C++26
	void* operator new[](std::size_t size, void* ptr) noexcept; // nodiscard in C++20, constexpr since C++26
	void operator delete (void* ptr, void*) noexcept;
	void operator delete[](void* ptr, void*) noexcept;

	*/

	#include <__config>
	#include <__exception/exception.h>
	#include <__type_traits/is_function.h>
	#include <__type_traits/is_same.h>
	#include <__type_traits/remove_cv.h>
	#include <__verbose_abort>
	#include <cstddef>
	#include <version>

	#if defined(_LIBCPP_ABI_VCRUNTIME)
	# include <new.h>
	#endif

	#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
	# pragma GCC system_header
	#endif

	#if !defined(__cpp_sized_deallocation) \|\| __cpp_sized_deallocation < 201309L
	# define _LIBCPP_HAS_NO_LANGUAGE_SIZED_DEALLOCATION
	#endif

	#if !defined(_LIBCPP_BUILDING_LIBRARY) && _LIBCPP_STD_VER < 14 && defined(_LIBCPP_HAS_NO_LANGUAGE_SIZED_DEALLOCATION)
	# define _LIBCPP_HAS_NO_LIBRARY_SIZED_DEALLOCATION
	#endif

	#if defined(_LIBCPP_HAS_NO_LIBRARY_SIZED_DEALLOCATION) \|\| defined(_LIBCPP_HAS_NO_LANGUAGE_SIZED_DEALLOCATION)
	# define _LIBCPP_HAS_NO_SIZED_DEALLOCATION
	#endif

	namespace std // purposefully not using versioning namespace
	{

	#if !defined(_LIBCPP_ABI_VCRUNTIME)
	struct _LIBCPP_EXPORTED_FROM_ABI nothrow_t {
	explicit nothrow_t() = default;
	};
	extern _LIBCPP_EXPORTED_FROM_ABI const nothrow_t nothrow;

	class _LIBCPP_EXPORTED_FROM_ABI bad_alloc : public exception {
	public:
	bad_alloc() _NOEXCEPT;
	_LIBCPP_HIDE_FROM_ABI bad_alloc(const bad_alloc&) _NOEXCEPT = default;
	_LIBCPP_HIDE_FROM_ABI bad_alloc& operator=(const bad_alloc&) _NOEXCEPT = default;
	~bad_alloc() _NOEXCEPT override;
	const char* what() const _NOEXCEPT override;
	};

	class _LIBCPP_EXPORTED_FROM_ABI bad_array_new_length : public bad_alloc {
	public:
	bad_array_new_length() _NOEXCEPT;
	_LIBCPP_HIDE_FROM_ABI bad_array_new_length(const bad_array_new_length&) _NOEXCEPT = default;
	_LIBCPP_HIDE_FROM_ABI bad_array_new_length& operator=(const bad_array_new_length&) _NOEXCEPT = default;
	~bad_array_new_length() _NOEXCEPT override;
	const char* what() const _NOEXCEPT override;
	};

	typedef void (*new_handler)();
	_LIBCPP_EXPORTED_FROM_ABI new_handler set_new_handler(new_handler) _NOEXCEPT;
	_LIBCPP_EXPORTED_FROM_ABI new_handler get_new_handler() _NOEXCEPT;

	#elif defined(_HAS_EXCEPTIONS) && _HAS_EXCEPTIONS == 0 // !_LIBCPP_ABI_VCRUNTIME

	// When _HAS_EXCEPTIONS == 0, these complete definitions are needed,
	// since they would normally be provided in vcruntime_exception.h
	class bad_alloc : public exception {
	public:
	bad_alloc() noexcept : exception("bad allocation") {}

	private:
	friend class bad_array_new_length;

	bad_alloc(char const* const __message) noexcept : exception(__message) {}
	};

	class bad_array_new_length : public bad_alloc {
	public:
	bad_array_new_length() noexcept : bad_alloc("bad array new length") {}
	};
	#endif // defined(_LIBCPP_ABI_VCRUNTIME) && defined(_HAS_EXCEPTIONS) && _HAS_EXCEPTIONS == 0

	_LIBCPP_NORETURN _LIBCPP_EXPORTED_FROM_ABI void __throw_bad_alloc(); // not in C++ spec

	_LIBCPP_NORETURN inline _LIBCPP_HIDE_FROM_ABI void __throw_bad_array_new_length() {
	#ifndef _LIBCPP_HAS_NO_EXCEPTIONS
	throw bad_array_new_length();
	#else
	_LIBCPP_VERBOSE_ABORT("bad_array_new_length was thrown in -fno-exceptions mode");
	#endif
	}

	#if !defined(_LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION) && !defined(_LIBCPP_ABI_VCRUNTIME)
	# ifndef _LIBCPP_CXX03_LANG
	enum class align_val_t : size_t {};
	# else
	enum align_val_t { __zero = 0, __max = (size_t)-1 };
	# endif
	#endif

	#if _LIBCPP_STD_VER >= 20
	// Enable the declaration even if the compiler doesn't support the language
	// feature.
	struct destroying_delete_t {
	explicit destroying_delete_t() = default;
	};
	inline constexpr destroying_delete_t destroying_delete{};
	#endif // _LIBCPP_STD_VER >= 20

	} // namespace std

	#if defined(_LIBCPP_CXX03_LANG)
	# define _THROW_BAD_ALLOC throw(std::bad_alloc)
	#else
	# define _THROW_BAD_ALLOC
	#endif

	#if !defined(_LIBCPP_ABI_VCRUNTIME)

	_LIBCPP_NODISCARD _LIBCPP_OVERRIDABLE_FUNC_VIS void* operator new(std::size_t __sz) _THROW_BAD_ALLOC;
	_LIBCPP_NODISCARD _LIBCPP_OVERRIDABLE_FUNC_VIS void* operator new(std::size_t __sz, const std::nothrow_t&) _NOEXCEPT
	_LIBCPP_NOALIAS;
	_LIBCPP_OVERRIDABLE_FUNC_VIS void operator delete(void* __p) _NOEXCEPT;
	_LIBCPP_OVERRIDABLE_FUNC_VIS void operator delete(void* __p, const std::nothrow_t&) _NOEXCEPT;
	# ifndef _LIBCPP_HAS_NO_LIBRARY_SIZED_DEALLOCATION
	_LIBCPP_OVERRIDABLE_FUNC_VIS void operator delete(void* __p, std::size_t __sz) _NOEXCEPT;
	# endif

	_LIBCPP_NODISCARD _LIBCPP_OVERRIDABLE_FUNC_VIS void* operator new[](std::size_t __sz) _THROW_BAD_ALLOC;
	_LIBCPP_NODISCARD _LIBCPP_OVERRIDABLE_FUNC_VIS void* operator new[](std::size_t __sz, const std::nothrow_t&) _NOEXCEPT
	_LIBCPP_NOALIAS;
	_LIBCPP_OVERRIDABLE_FUNC_VIS void operator delete[](void* __p) _NOEXCEPT;
	_LIBCPP_OVERRIDABLE_FUNC_VIS void operator delete[](void* __p, const std::nothrow_t&) _NOEXCEPT;
	# ifndef _LIBCPP_HAS_NO_LIBRARY_SIZED_DEALLOCATION
	_LIBCPP_OVERRIDABLE_FUNC_VIS void operator delete[](void* __p, std::size_t __sz) _NOEXCEPT;
	# endif

	# ifndef _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION
	_LIBCPP_NODISCARD _LIBCPP_OVERRIDABLE_FUNC_VIS void* operator new(std::size_t __sz, std::align_val_t) _THROW_BAD_ALLOC;
	_LIBCPP_NODISCARD _LIBCPP_OVERRIDABLE_FUNC_VIS void*
	operator new(std::size_t __sz, std::align_val_t, const std::nothrow_t&) _NOEXCEPT _LIBCPP_NOALIAS;
	_LIBCPP_OVERRIDABLE_FUNC_VIS void operator delete(void* __p, std::align_val_t) _NOEXCEPT;
	_LIBCPP_OVERRIDABLE_FUNC_VIS void operator delete(void* __p, std::align_val_t, const std::nothrow_t&) _NOEXCEPT;
	# ifndef _LIBCPP_HAS_NO_LIBRARY_SIZED_DEALLOCATION
	_LIBCPP_OVERRIDABLE_FUNC_VIS void operator delete(void* __p, std::size_t __sz, std::align_val_t) _NOEXCEPT;
	# endif

	_LIBCPP_NODISCARD _LIBCPP_OVERRIDABLE_FUNC_VIS void*
	operator new[](std::size_t __sz, std::align_val_t) _THROW_BAD_ALLOC;
	_LIBCPP_NODISCARD _LIBCPP_OVERRIDABLE_FUNC_VIS void*
	operator new[](std::size_t __sz, std::align_val_t, const std::nothrow_t&) _NOEXCEPT _LIBCPP_NOALIAS;
	_LIBCPP_OVERRIDABLE_FUNC_VIS void operator delete[](void* __p, std::align_val_t) _NOEXCEPT;
	_LIBCPP_OVERRIDABLE_FUNC_VIS void operator delete[](void* __p, std::align_val_t, const std::nothrow_t&) _NOEXCEPT;
	# ifndef _LIBCPP_HAS_NO_LIBRARY_SIZED_DEALLOCATION
	_LIBCPP_OVERRIDABLE_FUNC_VIS void operator delete[](void* __p, std::size_t __sz, std::align_val_t) _NOEXCEPT;
	# endif
	# endif

	_LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX26 void*
	operator new(std::size_t, void* __p) _NOEXCEPT {
	return __p;
	}
	_LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX26 void*
	operator new[](std::size_t, void* __p) _NOEXCEPT {
	return __p;
	}
	inline _LIBCPP_HIDE_FROM_ABI void operator delete(void, void) _NOEXCEPT {}
	inline _LIBCPP_HIDE_FROM_ABI void operator delete[](void, void) _NOEXCEPT {}

	#endif // !_LIBCPP_ABI_VCRUNTIME

	_LIBCPP_BEGIN_NAMESPACE_STD

	_LIBCPP_CONSTEXPR inline _LIBCPP_HIDE_FROM_ABI bool __is_overaligned_for_new(size_t __align) _NOEXCEPT {
	#ifdef __STDCPP_DEFAULT_NEW_ALIGNMENT__
	return __align > __STDCPP_DEFAULT_NEW_ALIGNMENT__;
	#else
	return __align > _LIBCPP_ALIGNOF(max_align_t);
	#endif
	}

	template <class... _Args>
	_LIBCPP_HIDE_FROM_ABI void* __libcpp_operator_new(_Args... __args) {
	#if __has_builtin(__builtin_operator_new) && __has_builtin(__builtin_operator_delete)
	return __builtin_operator_new(__args...);
	#else
	return ::operator new(__args...);
	#endif
	}

	template <class... _Args>
	_LIBCPP_HIDE_FROM_ABI void __libcpp_operator_delete(_Args... __args) {
	#if __has_builtin(__builtin_operator_new) && __has_builtin(__builtin_operator_delete)
	__builtin_operator_delete(__args...);
	#else
	::operator delete(__args...);
	#endif
	}

	inline _LIBCPP_HIDE_FROM_ABI void* __libcpp_allocate(size_t __size, size_t __align) {
	#ifndef _LIBCPP_HAS_NO_ALIGNED_ALLOCATION
	if (__is_overaligned_for_new(__align)) {
	const align_val_t __align_val = static_cast<align_val_t>(__align);
	return __libcpp_operator_new(__size, __align_val);
	}
	#endif

	(void)__align;
	return __libcpp_operator_new(__size);
	}

	template <class... _Args>
	_LIBCPP_HIDE_FROM_ABI void __do_deallocate_handle_size(void* __ptr, size_t __size, _Args... __args) {
	#ifdef _LIBCPP_HAS_NO_SIZED_DEALLOCATION
	(void)__size;
	return std::__libcpp_operator_delete(__ptr, __args...);
	#else
	return std::__libcpp_operator_delete(__ptr, __size, __args...);
	#endif
	}

	inline _LIBCPP_HIDE_FROM_ABI void __libcpp_deallocate(void* __ptr, size_t __size, size_t __align) {
	#if defined(_LIBCPP_HAS_NO_ALIGNED_ALLOCATION)
	(void)__align;
	return __do_deallocate_handle_size(__ptr, __size);
	#else
	if (__is_overaligned_for_new(__align)) {
	const align_val_t __align_val = static_cast<align_val_t>(__align);
	return __do_deallocate_handle_size(__ptr, __size, __align_val);
	} else {
	return __do_deallocate_handle_size(__ptr, __size);
	}
	#endif
	}

	inline _LIBCPP_HIDE_FROM_ABI void __libcpp_deallocate_unsized(void* __ptr, size_t __align) {
	#if defined(_LIBCPP_HAS_NO_ALIGNED_ALLOCATION)
	(void)__align;
	return __libcpp_operator_delete(__ptr);
	#else
	if (__is_overaligned_for_new(__align)) {
	const align_val_t __align_val = static_cast<align_val_t>(__align);
	return __libcpp_operator_delete(__ptr, __align_val);
	} else {
	return __libcpp_operator_delete(__ptr);
	}
	#endif
	}

	template <class _Tp>
	_LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR _Tp* __launder(_Tp* __p) _NOEXCEPT {
	static_assert(!(is_function<_Tp>::value), "can't launder functions");
	static_assert(!(is_same<void, __remove_cv_t<_Tp> >::value), "can't launder cv-void");
	return __builtin_launder(__p);
	}

	#if _LIBCPP_STD_VER >= 17
	template <class _Tp>
	[[nodiscard]] inline _LIBCPP_HIDE_FROM_ABI constexpr _Tp* launder(_Tp* __p) noexcept {
	return std::__launder(__p);
	}
	#endif

	#if _LIBCPP_STD_VER >= 17

	# if defined(__GCC_DESTRUCTIVE_SIZE) && defined(__GCC_CONSTRUCTIVE_SIZE)

	inline constexpr size_t hardware_destructive_interference_size = __GCC_DESTRUCTIVE_SIZE;
	inline constexpr size_t hardware_constructive_interference_size = __GCC_CONSTRUCTIVE_SIZE;

	# endif // defined(__GCC_DESTRUCTIVE_SIZE) && defined(__GCC_CONSTRUCTIVE_SIZE)

	#endif // _LIBCPP_STD_VER >= 17

	_LIBCPP_END_NAMESPACE_STD

	#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
	# include <cstdlib>
	# include <type_traits>
	#endif

	#endif // _LIBCPP_NEW