std::function::target

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C++
 
实用工具库
类型的支持 (basic types, RTTI, type traits)
动态内存管理
错误处理
程序实用工具
可变参数函数
日期和时间
函数对象
initializer_list（C++11）
bitset
hash（C++11）
关系运算符
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Relational operators
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rel_ops::operator!=
rel_ops::operator>
rel_ops::operator<=
rel_ops::operator>=
双和元组
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Pairs and tuples
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pair
tuple（C++11）
piecewise_construct_t（C++11）
piecewise_construct（C++11）
掉期，远期和移动
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Swap, forward and move
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swap
forward（C++11）
move（C++11）
move_if_noexcept（C++11）
declval（C++11）
 
函数对象
功能包装
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Function wrappers
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function（C++11）
mem_fn（C++11）
bad_function_call（C++11）
绑定
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Bind
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bind（C++11）
is_bind_expression（C++11）
is_placeholder（C++11）
_1, _2, _3, ...（C++11）
参考包装
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Reference wrappers
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reference_wrapper（C++11）
ref
cref		（C++11）
（C++11）
操作包装
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Operator wrappers
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否定词
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Negators
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已过时粘合剂和适配器
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Deprecated binders and adaptors
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unary_function（过时了）
binary_function（过时了）
ptr_fun（过时了）
pointer_to_unary_function（过时了）
pointer_to_binary_function（过时了）
mem_fun（过时了）
mem_fun_t
mem_fun1_t
const_mem_fun_t
const_mem_fun1_t		（过时了）
（过时了）
（过时了）
（过时了）
mem_fun_ref（过时了）
mem_fun_ref_t
mem_fun1_ref_t
const_mem_fun_ref_t
const_mem_fun1_ref_t		（过时了）
（过时了）
（过时了）
（过时了）
binder1st
binder2nd		（过时了）
（过时了）
bind1st
bind2nd		（过时了）
（过时了）
 
std::function
成员函数
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Member functions
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function::function
function::~function
function::operator=
function::swap
function::assign
function::operator bool
function::operator()
function::target_type
function::target
非成员函数
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Non-member functions
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operator==
operator!=
std::swap(std::function)
Helper类
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Helper classes
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std::uses_allocator<std::function>
 
template< class T >
T* target();
 (1) （C++11 起）
template< class T >
const T* target() const;
 (2) （C++11 起）
返回一个指针，指向存储功能目标.
Original:
Returns a pointer to the stored function target.
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目录

[编辑] 参数

（无）
Original:
(none)
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[编辑] 返回值

存储功能如果target_type() == typeid(T)，否则为空指针的指针.
Original:
A pointer to the stored function if target_type() == typeid(T), otherwise a null pointer.
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[编辑] 例外

noexcept specification:  
noexcept
  （C++11 起）

[编辑] 为例

本节是不完整的
原因: no example

[编辑] 另请参阅
获得所存储的目标的typeidstd::function
Original:
obtains the typeid of the stored target of a std::function
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（公共成员函数） [edit]
来自“http://zh.cppreference.com/mwiki/index.php?title=cpp/utility/functional/function/target&oldid=26710”