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    std::is_member_function_pointer

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    Defined in header <type_traits>
    template< class T > struct is_member_function_pointer;
    		 (since C++11)
    See More

    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< class T > constexpr bool is_member_function_pointer_v = is_member_function_pointer<T>::value;
    		 (since C++17)
    [edit]

    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_type bool
    type std::integral_constant<bool, value>

    Possible implementation

    template<class T>
struct is_member_function_pointer_helper : std::false_type {};

template<class T, class U>
struct is_member_function_pointer_helper<T U::*> : std::is_function<T> {};

template<class T>
struct is_member_function_pointer 
    : is_member_function_pointer_helper<typename std::remove_cv<T>::type> {};

    Example

    Run this code
    #include <type_traits>

class A
{
public:
    void member() {}
};

int main()
{
    // fails at compile time if A::member is a data member and not a function
    static_assert(std::is_member_function_pointer<decltype(&A::member)>::value,
                  "A::member is not a member function."); 
}

    See also

    (C++11)
    		 checks if a type is a pointer type
    (class template) [edit]
    (C++11)
    		 checks if a type is a non-static member object pointer
    (class template) [edit]
    (C++11)
    		 checks if a type is a pointer to a non-static member function or object
    (class template) [edit]