std::mem_fun_ref_t, std::mem_fun1_ref_t, std::const_mem_fun_ref_t, std::const_mem_fun1_ref_t

From cppreference.com
< cpplrm; | utilitylrm; | functional
Function objects
Function wrappers
(C++11)
(C++11)
Bind
(C++11)
Function invocation
(C++17)
Identity function object
(C++20)
Reference wrappers
(C++11)(C++11)
Operator wrappers
Negators
(C++17)
Searchers
Old binders and adaptors
(until C++17)
(until C++17)
(until C++17)
(until C++17)
(until C++17)(until C++17)(until C++17)(until C++17)
(until C++20)
(until C++20)
(until C++17)(until C++17)
(until C++17)(until C++17)

(until C++17)
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)
(until C++20)
(until C++20)
template< class S, class T >

class mem_fun_ref_t : public unary_function<T,S> {
public:
explicit mem_fun_ref_t(S (T::*p)());
S operator()(T& p) const;

};
(1) (deprecated in C++11)
(removed in C++17)
template< class S, class T >

class const_mem_fun_ref_t : public unary_function<T,S> {
public:
explicit const_mem_fun_ref_t(S (T::*p)() const);
S operator()(const T& p) const;

};
(2) (deprecated in C++11)
(removed in C++17)
template< class S, class T, class A >

class mem_fun1_ref_t : public binary_function<T,A,S> {
public:
explicit mem_fun1_ref_t(S (T::*p)(A));
S operator()(T& p, A x) const;

};
(3) (deprecated in C++11)
(removed in C++17)
template< class S, class T, class A >

class const_mem_fun1_ref_t : public binary_function<T,A,S> {
public:
explicit const_mem_fun1_ref_t(S (T::*p)(A) const);
S operator()(const T& p, A x) const;

};
(4) (deprecated in C++11)
(removed in C++17)

Wrapper around a member function pointer. The class instance whose member function to call is passed as a reference to the operator().

1) Wraps a non-const member function with no parameters.
2) Wraps a const member function with no parameters.
3) Wraps a non-const member function with a single parameter.
4) Wraps a const member function with a single parameter.

See also

(deprecated in C++11)(removed in C++17)
creates a wrapper from a pointer to member function, callable with a reference to object
(function template)
(deprecated in C++11)(removed in C++17)
wrapper for a pointer to nullary or unary member function, callable with a pointer to object
(class template)