template <class S, class T> class mem_fun_t;

<functional>

Generate function object class from parameterless member (pointer version)

Generates an unary function object class from a parameterless member of class T that returns a value of type S.

mem_fun_t is generally used as a type. The function mem_fun (also defined in header <functional>) can be used to directly construct an object of this type.

This class is derived from unary_function and is typically defined as:

template <class S, class T>
  class mem_fun_t : public unary_function <T*,S>
{
  S (T::*pmem)();
public:
  explicit mem_fun_t ( Result (T::*p)() ) : pmem (p) {}
  S operator() (T* p) const
    { return (p->*pmem)(); }
};

Members

constructor

Constructs an unary function object class from member function p of class T. The return type of this member function shall be type compatible with type S.

S operator() (T* p) const

Member function taking one parameter. The argument expected for it is a pointer to an object of type T whose member is to be called.

See also