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...
function<int(int, int)> f = g_Minus; cout << f(1, 2) << endl; // -1 return 1; } 赋值给函数对象 std::function<bool()> fIsItemValid = [this](){inttimeOutCount =VALUE_0;do{if(m_parent && m_xAxis &&m_yAxis){returntrue; }else{++timeOutCount; QThread::msleep(TIME_OUT_...
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...
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::...
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::...
C++11 仿函数(functor) std::function std::bind Part1:仿函数(functor) 1.简介: functor的英文解释为something that performs a function,即其行为类似函数的东西。C++中的仿函数是通过在类中重载 () 运算符实现,使你可以像使用函数一样来创建类的对象。
As described inCallable, when invoking a pointer to non-static member function or pointer to non-static data member, the first argument has to be a reference or pointer (including, possibly, smart pointer such asstd::shared_ptrandstd::unique_ptr) to an object whose member will be accessed...
std::function<void(const std::string &)> update_; private: void Update(const std::string...
; // returns ten_two.a std::cout << bound_member_data() << '\n'; // 10 return 0; } By default, bind makes a copy of the provided function object. boost::ref and boost::cref can be used to make it store a reference to the function object, rather than a copy. This can ...
Parameters 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 ...