// 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'; // smart pointers can be used to call members...
template<size_t idx>constexprautoph=placeholder<idx>{}; 那么,bind的实现就基本完结了! 扩展支持嵌套bind 标准的bind是支持嵌套的,比如如下代码 // nested bind subexpressions share the placeholdersautof2=std::bind(f,_3,std::bind(g,_3),_3,4,5);f2(10,11,12);// makes a call to f(12, g...
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...
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 object is noncopyable, expensive to copy, or contains state; ...
f-Callableobject (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 theplaceholders_1,_2,_3... of namespacestd::plac...
// bind to a pointer to data member auto f4 = std::bind(&Foo::data, _1); std::cout << f4(foo) << '\n'; // smart pointers can be used to call members of the referenced objects, too std::cout << f4(std::make_shared<Foo>(foo)) << '\n' ...
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 << "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 << "5) bind to a pointer to member function: "; Foo foo; auto f3 = std::bind(&Foo::print_sum, &foo, 95, _1); f3(5); 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);...
Bind function arguments to functions. References: boost::bind Authors: Tomasz Stachowiak Date: November 28, 2006 const DynArg!(0) _0; const DynArg!(1) _1; const DynArg!(2) _2; const DynArg!(3) _3; const DynArg!(4) _4;