std::is_member_object_pointer<T>::value 或者 std::is_member_object_pointer_v<T> 。其中 T ...
structRecord{inta;intb;};intRecord::*pa=&Record::a;// movQWORD PTR -8[rbp], 0intRecord:...
下面是演示C++中std::is_member_object_pointer:的程序: 程序: // C++ program to illustrate// std::is_member_object_pointer#include<bits/stdc++.h>#include<type_traits>usingnamespacestd;// Declare a structureclassGFG{public:intgfg; };classA{};// Driver Codeintmain(){// Object to class GF...
在C++中,std::is_member_object_pointer是一个类型特性模板,用于确定一个类型是否为成员对象指针。它是C++标准库中的一个类型特性模板之一,位于<type_traits>头文件中。 用法 std::is_member_object_pointer的用法非常简单,只需要将要检查的类型作为其模板参数,并且可以使用::value成员来获取结果,它是一个静态常量...
} else if constexpr (std::is_member_object_pointer_v<std::remove_reference_t<F>>) { if constexpr (std::is_base_of_v<std::remove_reference_t<F>, std::remove_reference_t<T>>) { return std::forward<T>(t).*f; } else { ...
std :: is_member_function_pointer是C++标准库中的Type Trait之一,可用于检查给定类型是否是成员函数指针类型。它的定义如下: template<class T> struct is_member_function_pointer; 如果T是成员函数指针类型,则is_member_function_pointer的值为true,否则为false。
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) Mem...
If T is pointer to non-static member object or a pointer to non-static member function, provides the member constant value equal true. For any other type, value is false. If the program adds specializations for std::is_member_pointer or std::is_member_pointer_v, the behavior is undefin...
: is_member_function_pointer_helper< std::remove_cv_t<T> > #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...
std::is_member_object_pointer_v<std::remove_reference_t<F>>y、 一是成员函数指针,指向成员函数,然后判断是否基类,判断是否多态调用, 二是成员对象指针,要知道成员函数和成员对象是不一样的(函数不占内存什么的),也就是说,我们可以做这样的事: