std::mem_fun

template< class Res, class T > 
std::mem_fun_t<Res,T> mem_fun( Res (T::*f)() );

template< class Res, class T > 
std::const_mem_fun_t<Res,T> mem_fun( Res (T::*f)() );

template< class Res, class T, class Arg > 
std::mem_fun1_t<Res,T,Arg> mem_fun( Res (T::*f)(Arg) );

template< class Res, class T, class Arg > 
std::const_mem_fun1_t<Res,T,Arg> mem_fun( S (T::*f)(Arg) );

Creates a member function wrapper object, deducing the target type from the template arguments. The wrapper object expects a pointer to an object of type T as the first parameter to its operator().

This function and the related types were deprecated in C++11 and removed in C++17 in favor of the more general std::mem_fn and std::bind, both of which create callable adapter-compatible function objects from member functions.

Parameters

Return value

A function object wrapping f.

Exceptions

(none).

Notes

The difference between std::mem_fun and std::mem_fun_ref is that the former produces an function wrapper that expects a pointer to an object, whereas the latter -- a reference.

Example

See also