对于类成员函数、lambda表达式或其他可调用对象就无能为力了，因此，C++11推出了std::function与std::b...
std::cout<<"bind to a pointer to member function:\n"; Foo foo; auto f3= std::bind(&Foo::print_sum, &foo,95, _1); f3(5); std::cout<<"bind to a pointer to data member:\n"; auto f4= std::bind(&Foo::data, _1); std::cout<< f4(foo) <<'\n'; std::cout<<"use s...
int n2){std::cout<<n1+n2<<'\n';}int data=10;};intmain(){using namespace std::placeholders;// for _1, _2, _3...std::cout<<"1) bind to a pointer to member function: ";Foo foo;// 这里的&foo就是为了补齐成员变量里面的默认参数thisauto f3=std::bind(&Foo::...
std::cout <<'\n';// bind to a pointer to member function Foo foo;auto f3 = std::bind(&Foo::print_sum, &foo,95, _1);f3(5);// bind to a pointer to data memberauto f4 = std::bind(&Foo::data, _1); std::cout <<f4(foo) <<'\n';// smart pointers can be used to c...
一、std::function 1、概念 std::function是一个函数包装器模板,最早来自boost库,对应其boost::function函数包装器。在c++0x11中,将boost::function纳入标准库中。该函数包装器模板能包装任何类型的可调用元素(callable element),例如普通函数和函数对象。包装器对象可以进行拷贝,并且包装器类型仅仅只依赖于其调用特征...
An object of a function class instantiation can wrap any of the following kinds of callable objects: a function, a function pointer, a pointer to member, or any kind of function object (i.e., an object whose class defines operator(), including closures). ...
invoke内部先判断第一个函数指针是否meet std::is_member_function_pointer requirement, 生成对应的__inv...
f-Callable object (function object, pointer to function, reference to function, pointer to member function, or pointer to data member) that will be bound to some arguments args-list of arguments to bind, with the unbound arguments replaced by the placeholders _1, _2, _3... of namespace ...
my_minimal_publisher_object_pointer->MinimalPublisher::timer_callback (); 您可能希望在您最喜欢的联机编译器中尝试此功能。 顺便说一句,std::bind在很大程度上已经被这些天捕获的兰巴斯所取代。因此,为了捕获所需的对象实例(并以我在Wandbox的原始示例为起点),您可以执行以下操作: #include <functional> struct...
std::function<void (int,int)> fun_bind = std::bind(fun, std::placeholders::_1, std::placeholders::_2, p3); fun_bind(p1, p2); // p1 and p2 passed by reference !! Func func; // VERY IMPORTANT // bind will call copy constructor to produce a object same with func ...