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 << "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this auto f3 = std::bind(&Foo::print_sum, &foo, 95, _1); f3(5); std::cout << "2) bind to a mem_fn that is a pointer to member function: "; } 执行...
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...
它可以看做是C++98标准库中函数对象mem_fun_t, pointer_to_unary_function等的替代品。同样的,bind()也可以被看做是bind1st()和bind2nd()的替代品,当然比他们更强大更灵活。 参考: Standard:20.7.12Function template bind,20.7.16.2Class template function Herb Sutter:Generalized Function Pointers . August200...
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). ...
lambda表达式是从C++11开始引入的,主要用来定义匿名函数和闭包。lambda表达式可以被当作一个值赋给另一个变量,也可以作为实参传递给其他函数,或者作为其他函数的返回结果,用法类似于前面提到的函数对象和函数指针。如果只是把单个函数拿来传参,lambda表达式的使用方式比函数指针和函数对象更简洁。
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 ...
I attempted to use a std::bind to create such a function pointer like this: autofn1 = &std::bind(&OSystem_Cli::mixCallback, *_gSystemCli, std::placeholders::_1, std::placeholders::_2); However I get this error in a file called xmemory: ...