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Learn more about: mem_fun_t Class |
mem_fun_t Class |
02/21/2019 |
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242566d4-750c-4c87-9d63-2e2c9d19ca2a |
An adapter class that allows a non_const
member function that takes no arguments to be called as a unary function object when initialized with a pointer argument. Deprecated in C++11, removed in C++17.
template <class Result, class Type>
class mem_fun_t : public unary_function<Type *, Result> {
explicit mem_fun_t(Result (Type::* _Pm)());
Result operator()(Type* _Pleft) const;
};
_Pm
A pointer to the member function of class Type
to be converted to a function object.
_Pleft
The object that the _Pm member function is called on.
An adaptable unary function.
The class template stores a copy of _Pm, which must be a pointer to a member function of class Type
, in a private member object. It defines its member function operator()
as returning (_Pleft
->* _Pm
)().
The constructor of mem_fun_t
is not usually used directly; the helper function mem_fun
is used to adapt member functions. See mem_fun for an example of how to use member function adaptors.