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_...
f2(10, 11, 12); // makes a call to f(12, g(12), 12, 4, 5); // 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 member auto f4 = std::bind(&Foo::data, _1); std::cou...
可将std::bind函数看作一个通用的函数适配器,它接受一个可调用对象,生成一个新的可调用对象来“适应”原对象的参数列表。 std::bind将可调用对象与其参数一起进行绑定,绑定后的结果可以使用std::function保存。 链接:https://www.jianshu.com/p/f191e88dcc80 概括:设置可调用对象(函数)的某些参数为可变变量,...
5.绑定到成员函数指针包装器mem_fn(bind to a mem_fn that is a pointer to member function) 5.1 示例代码 5.2 解析 6. 绑定类成员变量 6.1 示例代码 6.2 解析 std::bind 1. 参数重排序和引用传递(argument reordering and pass-by-reference)
std::bind(Function, args...) 其中,Function是需要绑定的函数对象,args是需要绑定的参数。 std::bind的作用是将函数对象与部分参数进行绑定,生成一个新的可调用对象。这样可以延迟函数的调用,以便在需要时再进行调用。通过std::bind,我们可以实现函数的柯里化(Currying)和参数重排(Argument Reordering)。 std::bin...
std::cout <<rnd() <<' '; std::cout <<'\n';// bind to a pointer to member functionFoo foo;autof3 = std::bind(&Foo::print_sum, &foo,95, _1);f3(5);// bind to a pointer to data memberautof4 = std::bind(&Foo::data, _1); std::cout <<f4(foo) <<'\n';// smart...
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 ...
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); std::cout << "7) bind to a pointer to data member: "; ...
// 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 member auto f4 = std::bind(&Foo::data, _1); std::cout << f4(foo) << '\n'; ...