| Defined in header <functional> | ||
|---|---|---|
template< class Res, class T > std::mem_fun_t<Res,T> mem_fun( Res (T::*f)() ); | (1) | (until C++17) (deprecated since C++11) |
template< class Res, class T > std::const_mem_fun_t<Res,T> mem_fun( Res (T::*f)() ); | (1) | (until C++17) (deprecated since C++11) |
template< class Res, class T, class Arg > std::mem_fun1_t<Res,T,Arg> mem_fun( Res (T::*f)(Arg) ); | (2) | (until C++17) (deprecated since C++11) |
template< class Res, class T, class Arg > std::const_mem_fun1_t<Res,T,Arg> mem_fun( S (T::*f)(Arg) ); | (2) | (until C++17) (deprecated since C++11) |
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().
1) Effectively calls
std::mem_fun_t<S,T>(f) or std::const_mem_fun_t<S,T>(f). 2) Effectively calls
std::mem_fun1_t<S,T>(f) or std::const_mem_fun1_t<S,T>(f).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
| f | - | pointer to a member function to create a wrapper for |
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
| (until C++17) | creates a wrapper from a pointer to member function, callable with a reference to object (function template) |
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