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std::mem_fun

STD：MEM[医]乐趣

Defined in header ​​
template< class Res, class T > std::mem_fun_t<Res,T> mem_fun( Res (T::*f)() (1)(until C++17)(deprecated since C++11)
template< class Res, class T > std::const_mem_fun_t<Res,T> mem_fun( Res (T::*f)() (1)(until C++17)(deprecated since C++11)
template< class Res, class T, class Arg > std::mem_fun1_t<Res,T,Arg> mem_fun( Res (T::*f)(Arg) (2)(until C++17)(deprecated since C++11)
template< class Res, class T, class Arg > std::const_mem_fun1_t<Res,T,Arg> mem_fun( S (T::*f)(Arg) (2)(until C++17)(deprecated since C++11)

创建成员函数包装对象，从模板参数推断目标类型。包装器对象需要指向类型对象的指针。T作为它的第一个参数operator()...

1%29有效呼叫std::mem_fun_t<S,T>(f)或std::const_mem_fun_t<S,T>(f)...

2%29有效呼叫std::mem_fun1_t<S,T>(f)或std::const_mem_fun1_t<S,T>(f)...

这个函数和相关的类型在C++11中被取消，在C++17中被删除，以支持更一般的std::mem_fn和std::bind，它们都从成员函数创建可调用适配器兼容的函数对象。

参数

f-pointer to a member function to create a wrapper for

返回值

函数对象包装f...

例外

%280%29

注记

之间的区别std::mem_fun和std::mem_fun_ref前者产生一个函数包装器，期望一个指向对象的指针，而后者--一个引用。

例

另见

mem_fun_ref (until C++17)creates a wrapper from a pointer to member function, callable with a reference to object (function template)

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在CreativeCommonsAttribution下授权-ShareAlike未移植许可v3.0。

http：//en.cppreference.com/w/cpp/实用程序/Functionalmem[医]乐趣

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