std::is_member_function_pointer - cppreference.com

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template<classT>structis_member_function_pointer;(since C++11)std::is_member_function_pointer is a

UnaryTypeTrait

.

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

std::integral_constant

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