std::allocator<T>::allocator

 

C++

语言

标准库头文件

自立与有宿主实现

具名要求

语言支持库

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诊断库

工具库

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算法库

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本地化库

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文件系统库 (C++17)

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技术规范

 

动态内存管理

智能指针 unique_ptr (C++11) shared_ptr (C++11) weak_ptr (C++11) auto_ptr (C++17 前) owner_less (C++11) enable_shared_from_this (C++11) bad_weak_ptr (C++11) default_delete (C++11) 分配器 allocator allocator_traits (C++11) allocator_arg_t (C++11) allocator_arg (C++11) uses_allocator (C++11) uses_allocator_construction_args (C++20) make_obj_using_allocator (C++20) uninitialized_construct_using_allocator (C++20) scoped_allocator_adaptor (C++11) pmr::polymorphic_allocator (C++17) 内存资源 pmr::memory_resource (C++17) pmr::get_default_resource (C++17) pmr::set_default_resource (C++17) pmr::new_delete_resource (C++17) pmr::null_memory_resource (C++17) pmr::synchronized_pool_resource (C++17) pmr::unsynchronized_pool_resource (C++17) pmr::monotonic_buffer_resource (C++17) pmr::pool_options (C++17) 未初始化存储 raw_storage_iterator (C++20 前) get_temporary_buffer (C++20 前) return_temporary_buffer (C++20 前)

未初始化内存算法 uninitialized_copy uninitialized_fill uninitialized_move (C++17) uninitialized_default_construct (C++17) uninitialized_value_construct (C++17) destroy (C++17) destroy_at (C++17) uninitialized_copy_n (C++11) uninitialized_fill_n uninitialized_move_n (C++17) uninitialized_default_construct_n (C++17) uninitialized_value_construct_n (C++17) destroy_n (C++17) construct_at (C++20) 受约束的未初始化内存算法 ranges::uninitialized_copy (C++20) ranges::uninitialized_fill (C++20) ranges::uninitialized_move (C++20) ranges::uninitialized_default_construct (C++20) ranges::uninitialized_value_construct (C++20) ranges::destroy (C++20) ranges::destroy_at (C++20) ranges::uninitialized_copy_n (C++20) ranges::uninitialized_fill_n (C++20) ranges::uninitialized_move_n (C++20) ranges::uninitialized_default_construct_n (C++20) ranges::uninitialized_value_construct_n (C++20) ranges::destroy_n (C++20) ranges::construct_at (C++20) 垃圾收集支持 declare_reachable (C++11) undeclare_reachable (C++11) declare_no_pointers (C++11) undeclare_no_pointers (C++11) pointer_safety (C++11) get_pointer_safety (C++11) 杂项 pointer_traits (C++11) to_address (C++20) addressof (C++11) align (C++11) assume_aligned (C++20) C 库 malloc aligned_alloc (C++17) calloc realloc free 低层内存管理

 

std::allocator

成员函数

allocator::allocator

allocator::~allocator

allocator::address (C++20 前)

allocator::allocate

allocator::deallocate

allocator::max_size (C++20 前)

allocator::construct (C++20 前)

allocator::destroy (C++20 前)

非成员函数

operator==operator!= (C++20 前)

 

	(1)
allocator() throw();			(C++11 前)
allocator() noexcept;			(C++11 起) (C++20 前)
constexpr allocator() noexcept;			(C++20 起)
		(2)
allocator( const allocator& other ) throw();				(C++11 前)
allocator( const allocator& other ) noexcept;				(C++11 起) (C++20 前)
constexpr allocator( const allocator& other ) noexcept;				(C++20 起)
			(3)
template< class U > allocator( const allocator<U>& other ) throw();					(C++11 前)
template< class U > allocator( const allocator<U>& other ) noexcept;					(C++11 起) (C++20 前)
template< class U > constexpr allocator( const allocator<U>& other ) noexcept;					(C++20 起)

构造默认分配器。因为默认分配器是无状态的，故构造函数无可见效应。

参数

other

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用以构造的另一 allocator