const_mem_fun1_t

A const to member function object type.

  template<class S, class T, class A> const_mem_fun1_t

  : publid binary_function<T,A,S>

  explicit mem_fun_fun1_t(S (T::*p)(A) const);  

The constructor for const_mem_fun1_t calls the member function that it is initialized with using a given a pointer argument and an additional argument of the appropriate type.