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 po
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::function<void(int ,int)> func; std::function 的实例能存储、复制及调用任何可调用 (Callable) 目标——函数、 lambda 表达式、 bind 表达式或其他函数对象,还有指向成员函数指针和指向数据成...
bind(_Rx(CALL_OPT_Farg0::*const_Pmf)(_Ftypes...)CV_OPT,_Types&&..._Args) \ {/* bind a wrapped CV_OPT member function pointer */\ ... } _MEMBER_CALL_CV(_IMPLICIT_PMF_WRAP, ) ... • 函数模板说明 以cplusplus.com中描述的原型说明: 基于Fn参数返回一个函数对象,并且以Args参数绑...
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...
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...
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::...
std::function<void(const std::string &)> update_; private: void Update(const std::string...
::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 be useful when the function ...
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 ...