From cppreference.com
template<classT>structis_member_function_pointer;(since C++11)std::is_member_function_pointer is a
.
Checks whether T is a non-static member function pointer. Provides the member constant value which is equal to true, if T is a non-static member function pointer type. Otherwise, value is equal to false.
If the program adds specializations for std::is_member_function_pointer or std::is_member_function_pointer_v, the behavior is undefined.
Template parameters
T - a type to check Helper variable template
template<classT>constexprboolis_member_function_pointer_v=is_member_function_pointer<T>::value;(since C++17)Inherited from
Member constants
value
[static]
true if T is a member function pointer type, false otherwise
(public static member constant)Member functions
operator bool
converts the object to bool, returns value
(public member function)operator()
(C++14)
returns value
(public member function)Member types
Type Definition value_typebooltypestd::integral_constant<bool,value>Possible implementation
template<classT>structis_member_function_pointer_helper:std::false_type{};template<classT,classU>structis_member_function_pointer_helper<TU::*>:std::is_function<T>{};template<classT>structis_member_function_pointer:is_member_function_pointer_helper<typenamestd::remove_cv<T>::type>{};Example
Run this code
#include<type_traits>classA{public:voidmember(){}};intmain(){// fails at compile time if A::member is a data member and not a functionstatic_assert(std::is_member_function_pointer<decltype(&A::member)>::value,"A::member is not a member function.");}See also