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std::mem_fun_t

STD：MEM[医]乐趣[医]T，STD：：MEM[医]漏斗1[医]T，STD：：Const[医]米姆[医]乐趣[医]T，STD：：Const[医]米姆[医]漏斗1[医]T型

template< class S, class T > class mem_fun_t : public unary_function { public: explicit mem_fun_t(S (T::*p)() S operator()(T* p) const; };(1)(until C++17)(deprecated since C++11)
template< class S, class T > class const_mem_fun_t : public unary_function<const T*,S> { public: explicit const_mem_fun_t(S (T::*p)() const S operator()(const T* p) const; };(2)(until C++17)(deprecated since C++11)
template< class S, class T, class Arg > class mem_fun1_t : public binary_function<T*,A,S> { public: explicit mem_fun1_t(S (T::*p)(A) S operator()(T* p, A x) const; };(3)(until C++17)(deprecated since C++11)
template< class S, class T, class A > class const_mem_fun1_t : public binary_function<const T*,A,S> { public: explicit const_mem_fun1_t(S (T::*p)(A) const S operator()(const T* p, A x) const; };(4)(until C++17)(deprecated since C++11)

成员函数指针的包装器。调用其成员函数的类实例作为指向operator()...

1%29封装一个不含参数的非Const成员函数.

2%29封装不带参数的Const成员函数。

3%29用一个参数包装一个非Const成员函数。

4%29用一个参数包装一个Const成员函数。

另见

mem_fun (until C++17)creates a wrapper from a pointer to member function, callable with a pointer to object (function template)
mem_fun_ref_tmem_fun1_ref_tconst_mem_fun_ref_tconst_mem_fun1_ref_t (until C++17)(until C++17)(until C++17)(until C++17)wrapper for a pointer to nullary or unary member function, callable with a reference to object (class template)

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