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std::is_member_function_pointer

STD：：是[医]成员[医]功能[医]指针

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

检查是否T是一个非静态成员函数指针。提供成员常量。value等于true，如果T是非静态成员函数指针类型。否则，value等于false...

模板参数

T-a type to check

辅助变量模板

template< class T > inline constexpr bool is_member_function_pointer_v = is_member_function_pointer::value;​(since C++17)

继承自STD：积分[医]常量

成员常数

value statictrue if T is a member function pointer type , false otherwise (public static member constant)

成员函数

operator boolconverts the object to bool, returns value (public member function)
operator() (C++14)returns value (public member function)

成员类型

TypeDefinition
value_typebool
typestd::integral_constant<bool, value>

可能的实施

模板<class T>结构是[医]成员[医]功能[医]指针[医]助手：std：：false[医]类型{}；模板<类T，类U>结构是[医]成员[医]功能[医]指针[医]助手<T U：：%2A>：STD：：IS[医]功能<T>模板<class T>结构是[医]成员[医]功能[医]指针：是[医]成员[医]功能[医]指针[医]助手<std：：删除[医]CV[医]T型<T>>{}；

*。

例

二次

#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." 
}

二次

另见

is_pointer (C++11)checks if a type is a pointer type (class template)
is_member_object_pointer (C++11)checks if a type is a pointer to a non-static member object (class template)
is_member_pointer (C++11)checks if a type is a pointer to a non-static member function or object (class template)

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