標準庫標頭檔案 <new>

此標頭檔案是動態記憶體管理庫的一部分，特別是提供了低階記憶體管理功能。

namespace std {
  // storage allocation errors
  class bad_alloc;
  class bad_array_new_length;
 
  struct destroying_delete_t {
    explicit destroying_delete_t() = default;
  };
  inline constexpr destroying_delete_t destroying_delete{};
 
  // global operator new control
  enum class align_val_t : size_t {};
 
  struct nothrow_t { explicit nothrow_t() = default; };
  extern const nothrow_t nothrow;
 
  using new_handler = void (*)();
  new_handler get_new_handler() noexcept;
  new_handler set_new_handler(new_handler new_p) noexcept;
 
  // pointer optimization barrier
  template<class T> constexpr T* launder(T* p) noexcept;
 
  // hardware interference size
  inline constexpr size_t hardware_destructive_interference_size =
    /* implementation-defined */;
  inline constexpr size_t hardware_constructive_interference_size =
    /* implementation-defined */;
}
 
// storage allocation and deallocation
void* operator new(std::size_t size);
void* operator new(std::size_t size, std::align_val_t alignment);
void* operator new(std::size_t size, const std::nothrow_t&) noexcept;
void* operator new(std::size_t size, std::align_val_t alignment,
                                 const std::nothrow_t&) noexcept;
 
void  operator delete(void* ptr) noexcept;
void  operator delete(void* ptr, std::size_t size) noexcept;
void  operator delete(void* ptr, std::align_val_t alignment) noexcept;
void  operator delete(void* ptr, std::size_t size, std::align_val_t alignment) noexcept;
void  operator delete(void* ptr, const std::nothrow_t&) noexcept;
void  operator delete(void* ptr, std::align_val_t alignment,
                      const std::nothrow_t&) noexcept;
 
void* operator new[](std::size_t size);
void* operator new[](std::size_t size, std::align_val_t alignment);
void* operator new[](std::size_t size, const std::nothrow_t&) noexcept;
void* operator new[](std::size_t size, std::align_val_t alignment,
                                   const std::nothrow_t&) noexcept;
 
void  operator delete[](void* ptr) noexcept;
void  operator delete[](void* ptr, std::size_t size) noexcept;
void  operator delete[](void* ptr, std::align_val_t alignment) noexcept;
void  operator delete[](void* ptr, std::size_t size, std::align_val_t alignment) noexcept;
void  operator delete[](void* ptr, const std::nothrow_t&) noexcept;
void  operator delete[](void* ptr, std::align_val_t alignment,
                        const std::nothrow_t&) noexcept;
 
constexpr void* operator new  (std::size_t size, void* ptr) noexcept;
constexpr void* operator new[](std::size_t size, void* ptr) noexcept;
void  operator delete  (void* ptr, void*) noexcept;
void  operator delete[](void* ptr, void*) noexcept;

編譯器支援
自由（freestanding）與宿主（hosted）
語言
標準庫
標準庫標頭檔案
具名要求
特性測試宏 (C++20)
語言支援庫
概念庫 (C++20)
診斷庫
記憶體管理庫
超程式設計庫 (C++11)
通用工具庫
容器庫
迭代器庫
範圍庫 (C++20)
演算法庫
字串庫
文字處理庫
數值庫
日期和時間庫
輸入/輸出庫
檔案系統庫 (C++17)
併發支援庫 (C++11)
執行控制庫 (C++26)
技術規範
符號索引
外部庫

cppreference.com

名稱空間

變體

檢視

操作

標準庫標頭檔案 <new>

目錄

類

型別

標籤

常量

函式

[編輯] 提要

導航

工具箱