std::allocator::construct

 

C++

语言

概念

实用工具库

字符串库

集装箱库

算法库

迭代器库

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输入/输出库

本地化库

正则表达式库 （C++11）

原子操作库 （C++11）

线程的支持库 （C++11）

 

动态内存管理

低级别的内存管理
分配器 Original: Allocators The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
allocator
allocator_traits （C++11）
allocator_arg_t （C++11）
allocator_arg （C++11）
uses_allocator （C++11）
scoped_allocator_adaptor （C++11）
未初始化的存储空间 Original: Uninitialized storage The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
uninitialized_copy
uninitialized_copy_n （C++11）
uninitialized_fill
uninitialized_fill_n
raw_storage_iterator
get_temporary_buffer
return_temporary_buffer
智能指针 Original: Smart pointers The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
unique_ptr （C++11）
shared_ptr （C++11）
weak_ptr （C++11）
auto_ptr （过时了）
owner_less （C++11）
enable_shared_from_this （C++11）
bad_weak_ptr （C++11）
default_delete （C++11）
垃圾收集的支持 Original: Garbage collection support The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
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 Original: Miscellaneous The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
pointer_traits （C++11）
addressof （C++11）
align （C++11）
C库 Original: C Library The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
malloc calloc	realloc free

 

std::allocator

成员函数 Original: Member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

allocator::allocator

allocator::~allocator

allocator::address

allocator::allocate

allocator::deallocate

allocator::max_size

allocator::construct

allocator::destroy

非成员函数 Original: Non-member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

operator== operator!=

 

Defined in header <memory>
void construct( pointer p, const_reference val );		（至 C++11）
template< class U, class... Args > void construct( U* p, Args&&... args );		（C++11 起）

构造一个对象分配的未初始化存储类型T指出，p，使用放置新的

Original:

Constructs an object of type T in allocated uninitialized storage pointed to by p, using placement-new

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1)

调用new((void *)p) T(val)

Original:

Calls new((void *)p) T(val)

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2)

调用::new((void *)p) U(std::forward<Args>(args)...)

Original:

Calls ::new((void *)p) U(std::forward<Args>(args)...)

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参数

p	-	指针分配的未初始化存储 Original: pointer to allocated uninitialized storage The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
val	-	使用拷贝构造函数的参数值 Original: the value to use as the copy constructor argument The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
args...	-	构造函数的参数使用 Original: the constructor arguments to use The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

返回值

（无）

Original:

(none)

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另请参阅

construct [静态的] </ SPAN></div></div>	构造一个对象分配的存储空间 Original: constructs an object in the allocated storage The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数模板）
operator new operator new[]	分配的功能 Original: allocation functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数）