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> constexpr T* launder(T* p) noexcept; // C++17
 }  // 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
 void* operator new[](std::size_t size, void* ptr) noexcept;             // nodiscard in C++20
 void  operator delete  (void* ptr, void*) noexcept;
 void  operator delete[](void* ptr, void*) noexcept;

 */

 #include <__assert> // all public C++ headers provide the assertion handler
 #include <__availability>
 #include <__config>
 #include <__type_traits/is_function.h>
 #include <__type_traits/is_same.h>
 #include <__type_traits/remove_cv.h>
 #include <cstddef>
 #include <cstdlib>
 #include <exception>
 #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_TYPE_VIS nothrow_t { explicit nothrow_t() = default; };
 extern _LIBCPP_FUNC_VIS const nothrow_t nothrow;

 class _LIBCPP_EXCEPTION_ABI bad_alloc
     : public exception
 {
 public:
     bad_alloc() _NOEXCEPT;
     ~bad_alloc() _NOEXCEPT override;
     const char* what() const _NOEXCEPT override;
 };

 class _LIBCPP_EXCEPTION_ABI bad_array_new_length
     : public bad_alloc
 {
 public:
     bad_array_new_length() _NOEXCEPT;
     ~bad_array_new_length() _NOEXCEPT override;
     const char* what() const _NOEXCEPT override;
 };

 typedef void (*new_handler)();
 _LIBCPP_FUNC_VIS new_handler set_new_handler(new_handler) _NOEXCEPT;
 _LIBCPP_FUNC_VIS 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_FUNC_VIS void __throw_bad_alloc();  // not in C++ spec

 _LIBCPP_NORETURN inline _LIBCPP_INLINE_VISIBILITY
 void __throw_bad_array_new_length()
 {
 #ifndef _LIBCPP_NO_EXCEPTIONS
     throw bad_array_new_length();
 #else
     _VSTD::abort();
 #endif
 }

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

 #if _LIBCPP_STD_VER > 17
 // 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 > 17

 } // 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_AFTER_CXX17 _LIBCPP_OVERRIDABLE_FUNC_VIS void* operator new(std::size_t __sz) _THROW_BAD_ALLOC;
 _LIBCPP_NODISCARD_AFTER_CXX17 _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 _LIBCPP_AVAILABILITY_SIZED_NEW_DELETE void  operator delete(void* __p, std::size_t __sz) _NOEXCEPT;
 #endif

 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_OVERRIDABLE_FUNC_VIS void* operator new[](std::size_t __sz) _THROW_BAD_ALLOC;
 _LIBCPP_NODISCARD_AFTER_CXX17 _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 _LIBCPP_AVAILABILITY_SIZED_NEW_DELETE void  operator delete[](void* __p, std::size_t __sz) _NOEXCEPT;
 #endif

 #ifndef _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION
 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_OVERRIDABLE_FUNC_VIS void* operator new(std::size_t __sz, std::align_val_t) _THROW_BAD_ALLOC;
 _LIBCPP_NODISCARD_AFTER_CXX17 _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 _LIBCPP_AVAILABILITY_SIZED_NEW_DELETE void  operator delete(void* __p, std::size_t __sz, std::align_val_t) _NOEXCEPT;
 #endif

 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_OVERRIDABLE_FUNC_VIS void* operator new[](std::size_t __sz, std::align_val_t) _THROW_BAD_ALLOC;
 _LIBCPP_NODISCARD_AFTER_CXX17 _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 _LIBCPP_AVAILABILITY_SIZED_NEW_DELETE void  operator delete[](void* __p, std::size_t __sz, std::align_val_t) _NOEXCEPT;
 #endif
 #endif

 _LIBCPP_NODISCARD_AFTER_CXX17 inline _LIBCPP_INLINE_VISIBILITY void* operator new  (std::size_t, void* __p) _NOEXCEPT {return __p;}
 _LIBCPP_NODISCARD_AFTER_CXX17 inline _LIBCPP_INLINE_VISIBILITY void* operator new[](std::size_t, void* __p) _NOEXCEPT {return __p;}
 inline _LIBCPP_INLINE_VISIBILITY void  operator delete  (void*, void*) _NOEXCEPT {}
 inline _LIBCPP_INLINE_VISIBILITY void  operator delete[](void*, void*) _NOEXCEPT {}

 #endif // !_LIBCPP_ABI_VCRUNTIME

 _LIBCPP_BEGIN_NAMESPACE_STD

 _LIBCPP_CONSTEXPR inline _LIBCPP_INLINE_VISIBILITY bool __is_overaligned_for_new(size_t __align) _NOEXCEPT {
 #ifdef __STDCPP_DEFAULT_NEW_ALIGNMENT__
   return __align > __STDCPP_DEFAULT_NEW_ALIGNMENT__;
 #else
   return __align > alignment_of<max_align_t>::value;
 #endif
 }

 template <class ..._Args>
 _LIBCPP_INLINE_VISIBILITY
 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_INLINE_VISIBILITY
 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_INLINE_VISIBILITY
 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_INLINE_VISIBILITY
 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_INLINE_VISIBILITY
 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_INLINE_VISIBILITY 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
 }

 #if !defined(_LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION)
 // Low-level helpers to call the aligned allocation and deallocation functions
 // on the target platform. This is used to implement libc++'s own memory
 // allocation routines -- if you need to allocate memory inside the library,
 // chances are that you want to use `__libcpp_allocate` instead.
 //
 // Returns the allocated memory, or `nullptr` on failure.
 inline _LIBCPP_INLINE_VISIBILITY void* __libcpp_aligned_alloc(std::size_t __alignment, std::size_t __size) {
 #  if defined(_LIBCPP_MSVCRT_LIKE)
     return ::_aligned_malloc(__size, __alignment);
 #  elif _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_C11_ALIGNED_ALLOC)
     // aligned_alloc() requires that __size is a multiple of __alignment,
     // but for C++ [new.delete.general], only states "if the value of an
     // alignment argument passed to any of these functions is not a valid
     // alignment value, the behavior is undefined".
     // To handle calls such as ::operator new(1, std::align_val_t(128)), we
     // round __size up to the next multiple of __alignment.
     size_t __rounded_size = (__size + __alignment - 1) & ~(__alignment - 1);
     // Rounding up could have wrapped around to zero, so we have to add another
     // max() ternary to the actual call site to avoid succeeded in that case.
     return ::aligned_alloc(__alignment, __size > __rounded_size ? __size : __rounded_size);
 #  else
     void* __result = nullptr;
     (void)::posix_memalign(&__result, __alignment, __size);
     // If posix_memalign fails, __result is unmodified so we still return `nullptr`.
     return __result;
 #  endif
 }

 inline _LIBCPP_INLINE_VISIBILITY
 void __libcpp_aligned_free(void* __ptr) {
 #if defined(_LIBCPP_MSVCRT_LIKE)
   ::_aligned_free(__ptr);
 #else
   ::free(__ptr);
 #endif
 }
 #endif // !_LIBCPP_HAS_NO_ALIGNED_ALLOCATION


 template <class _Tp>
 _LIBCPP_NODISCARD_AFTER_CXX17 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 > 14
 template <class _Tp>
 _LIBCPP_NODISCARD_AFTER_CXX17 inline _LIBCPP_HIDE_FROM_ABI
 constexpr _Tp* launder(_Tp* __p) noexcept
 {
     return _VSTD::__launder(__p);
 }
 #endif

 #if _LIBCPP_STD_VER > 14

 #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 > 14

 _LIBCPP_END_NAMESPACE_STD

 #if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
 #  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> constexpr T* launder(T* p) noexcept; // C++17
	} // 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
	void* operator new[](std::size_t size, void* ptr) noexcept; // nodiscard in C++20
	void operator delete (void* ptr, void*) noexcept;
	void operator delete[](void* ptr, void*) noexcept;

	*/

	#include <__assert> // all public C++ headers provide the assertion handler
	#include <__availability>
	#include <__config>
	#include <__type_traits/is_function.h>
	#include <__type_traits/is_same.h>
	#include <__type_traits/remove_cv.h>
	#include <cstddef>
	#include <cstdlib>
	#include <exception>
	#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_TYPE_VIS nothrow_t { explicit nothrow_t() = default; };
	extern _LIBCPP_FUNC_VIS const nothrow_t nothrow;

	class _LIBCPP_EXCEPTION_ABI bad_alloc
	: public exception
	{
	public:
	bad_alloc() _NOEXCEPT;
	~bad_alloc() _NOEXCEPT override;
	const char* what() const _NOEXCEPT override;
	};

	class _LIBCPP_EXCEPTION_ABI bad_array_new_length
	: public bad_alloc
	{
	public:
	bad_array_new_length() _NOEXCEPT;
	~bad_array_new_length() _NOEXCEPT override;
	const char* what() const _NOEXCEPT override;
	};

	typedef void (*new_handler)();
	_LIBCPP_FUNC_VIS new_handler set_new_handler(new_handler) _NOEXCEPT;
	_LIBCPP_FUNC_VIS 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_FUNC_VIS void __throw_bad_alloc(); // not in C++ spec

	_LIBCPP_NORETURN inline _LIBCPP_INLINE_VISIBILITY
	void __throw_bad_array_new_length()
	{
	#ifndef _LIBCPP_NO_EXCEPTIONS
	throw bad_array_new_length();
	#else
	_VSTD::abort();
	#endif
	}

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

	#if _LIBCPP_STD_VER > 17
	// 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 > 17

	} // 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_AFTER_CXX17 _LIBCPP_OVERRIDABLE_FUNC_VIS void* operator new(std::size_t __sz) _THROW_BAD_ALLOC;
	_LIBCPP_NODISCARD_AFTER_CXX17 _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 _LIBCPP_AVAILABILITY_SIZED_NEW_DELETE void operator delete(void* __p, std::size_t __sz) _NOEXCEPT;
	#endif

	_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_OVERRIDABLE_FUNC_VIS void* operator new[](std::size_t __sz) _THROW_BAD_ALLOC;
	_LIBCPP_NODISCARD_AFTER_CXX17 _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 _LIBCPP_AVAILABILITY_SIZED_NEW_DELETE void operator delete[](void* __p, std::size_t __sz) _NOEXCEPT;
	#endif

	#ifndef _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION
	_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_OVERRIDABLE_FUNC_VIS void* operator new(std::size_t __sz, std::align_val_t) _THROW_BAD_ALLOC;
	_LIBCPP_NODISCARD_AFTER_CXX17 _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 _LIBCPP_AVAILABILITY_SIZED_NEW_DELETE void operator delete(void* __p, std::size_t __sz, std::align_val_t) _NOEXCEPT;
	#endif

	_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_OVERRIDABLE_FUNC_VIS void* operator new[](std::size_t __sz, std::align_val_t) _THROW_BAD_ALLOC;
	_LIBCPP_NODISCARD_AFTER_CXX17 _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 _LIBCPP_AVAILABILITY_SIZED_NEW_DELETE void operator delete[](void* __p, std::size_t __sz, std::align_val_t) _NOEXCEPT;
	#endif
	#endif

	_LIBCPP_NODISCARD_AFTER_CXX17 inline _LIBCPP_INLINE_VISIBILITY void* operator new (std::size_t, void* __p) _NOEXCEPT {return __p;}
	_LIBCPP_NODISCARD_AFTER_CXX17 inline _LIBCPP_INLINE_VISIBILITY void* operator new[](std::size_t, void* __p) _NOEXCEPT {return __p;}
	inline _LIBCPP_INLINE_VISIBILITY void operator delete (void, void) _NOEXCEPT {}
	inline _LIBCPP_INLINE_VISIBILITY void operator delete[](void, void) _NOEXCEPT {}

	#endif // !_LIBCPP_ABI_VCRUNTIME

	_LIBCPP_BEGIN_NAMESPACE_STD

	_LIBCPP_CONSTEXPR inline _LIBCPP_INLINE_VISIBILITY bool __is_overaligned_for_new(size_t __align) _NOEXCEPT {
	#ifdef __STDCPP_DEFAULT_NEW_ALIGNMENT__
	return __align > __STDCPP_DEFAULT_NEW_ALIGNMENT__;
	#else
	return __align > alignment_of<max_align_t>::value;
	#endif
	}

	template <class ..._Args>
	_LIBCPP_INLINE_VISIBILITY
	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_INLINE_VISIBILITY
	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_INLINE_VISIBILITY
	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_INLINE_VISIBILITY
	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_INLINE_VISIBILITY
	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_INLINE_VISIBILITY 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
	}

	#if !defined(_LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION)
	// Low-level helpers to call the aligned allocation and deallocation functions
	// on the target platform. This is used to implement libc++'s own memory
	// allocation routines -- if you need to allocate memory inside the library,
	// chances are that you want to use `__libcpp_allocate` instead.
	//
	// Returns the allocated memory, or `nullptr` on failure.
	inline _LIBCPP_INLINE_VISIBILITY void* __libcpp_aligned_alloc(std::size_t __alignment, std::size_t __size) {
	# if defined(_LIBCPP_MSVCRT_LIKE)
	return ::_aligned_malloc(__size, __alignment);
	# elif _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_C11_ALIGNED_ALLOC)
	// aligned_alloc() requires that __size is a multiple of __alignment,
	// but for C++ [new.delete.general], only states "if the value of an
	// alignment argument passed to any of these functions is not a valid
	// alignment value, the behavior is undefined".
	// To handle calls such as ::operator new(1, std::align_val_t(128)), we
	// round __size up to the next multiple of __alignment.
	size_t __rounded_size = (__size + __alignment - 1) & ~(__alignment - 1);
	// Rounding up could have wrapped around to zero, so we have to add another
	// max() ternary to the actual call site to avoid succeeded in that case.
	return ::aligned_alloc(__alignment, __size > __rounded_size ? __size : __rounded_size);
	# else
	void* __result = nullptr;
	(void)::posix_memalign(&__result, __alignment, __size);
	// If posix_memalign fails, __result is unmodified so we still return `nullptr`.
	return __result;
	# endif
	}

	inline _LIBCPP_INLINE_VISIBILITY
	void __libcpp_aligned_free(void* __ptr) {
	#if defined(_LIBCPP_MSVCRT_LIKE)
	::_aligned_free(__ptr);
	#else
	::free(__ptr);
	#endif
	}
	#endif // !_LIBCPP_HAS_NO_ALIGNED_ALLOCATION


	template <class _Tp>
	_LIBCPP_NODISCARD_AFTER_CXX17 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 > 14
	template <class _Tp>
	_LIBCPP_NODISCARD_AFTER_CXX17 inline _LIBCPP_HIDE_FROM_ABI
	constexpr _Tp* launder(_Tp* __p) noexcept
	{
	return _VSTD::__launder(__p);
	}
	#endif

	#if _LIBCPP_STD_VER > 14

	#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 > 14

	_LIBCPP_END_NAMESPACE_STD

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

	#endif // _LIBCPP_NEW