};intmain() {usingnamespace std::placeholders;// for _1, _2, _3...// demonstrates argument reordering and pass-by-referenceint n =7;// (_1 and _2 are from std::placeholders, and represent future// arguments that will be passed to f1)auto f1 = std::bind(f, _2,42, _1, st...
// demonstrates argument reordering and pass-by-reference int n = 7; // (_1 and _2 are from std::placeholders, and represent future // arguments that will be passed to f1) auto f1 = std::bind(f, _2, 42, _1, std::cref(n), n); n = 10; f1(1, 2, 1001); // 1 is bo...
根据cppreference对第二种情况的描述: • If the stored argumentargis of typeTfor which std::is_bind_expression ::value == true (for example, anotherbindexpression was passed directly into the initial call tobind), thenbindperforms function composition: instead of passing the function object that...
If the stored argument arg is of type T for whichstd::is_bind_expression<T>::value == true...
argument reordering and pass-by-reference: 2 42 1 1001 7 2) achieving the same effect using a lambda: 2.bind对Class的使用例子: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 #include <random> #include <iostream> #include <memory> #include <functional> struct Foo { void print_sum(int...
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 ...
{usingnamespacestd::placeholders;// for _1, _2, _3...std::cout<<"1) argument reordering and pass-by-reference: ";intn=7;// (_1 and _2 are from std::placeholders, and represent future// arguments that will be passed to f1)autof1=std::bind(f, _2,42, _1,std::cref(n), ...
::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 ...
return n1; } struct Foo { void print_sum(int n1, int n2) { std::cout << n1+n2 << '\n'; } int data = 10; }; int main() { using namespace std::placeholders; // for _1, _2, _3... // demonstrates argument reordering and pass-by-reference ...
std::cout << "demonstrates argument reordering and pass-by-reference:\n"; int n = 7; // (_1 and _2 are from std::placeholders, and represent future // arguments that will be passed to f1) auto f1 = std::bind(f, _2, 42, _1, std::cref(n), n); ...