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...
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::...
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 << "6) bind to a mem_fn that is a pointer to member function: "; auto ptr_to_print_sum = std::mem_fn(&Foo::print_sum); auto f4 = std::bind(ptr_to_print_sum, &foo, 95, _1); f4(5); // 3、绑定成员变量方式一 std::cout << "7) bind to a pointer to dat...
C++之std::function与std::bind 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...
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). ...
; static_assert(std::is_function_pointer_v<&X::S_foo>); std::cout <<std::bind(&X...
std::pointer_to_binary_function std::pointer_to_unary_function std::pointer_traits std::ptrdiff_t std::ptr_fun std::quick_exit std::raise std::range_error std::rank std::rbegin(std::initializer_list) std::realloc std::ref std::reference_wrapper std::reference_wrapper::get std::referen...
std::function<std::vector<uint8_t>(Nor::Range)> f = std::bind(&Car::drive, this); 并出现以下错误: /usr/include/c++/9/functional:775:7: error: static assertion failed: Wrong number of arguments for pointer-to-member 774 | static_assert(_Varargs::value ...
一些典型的 Callable 类型 函数对象 Function Object 一个重载了括号操作符 的对象, 也就是可以以 f(args) 形式进行函数调用的对象. #include<iostream> #include<cstdlib> usingnamespacestd; classAdd{ public: constintoperator(constinta,constintb){ ...