std::move is used to indicate that an object t may be "moved from", i.e. allowing the efficient transfer of resources from t to another object. In particular,std::move produces an xvalue expression that identifies its argument t. It is exactly e…
std::forward argument: Returns an rvalue reference to arg if arg is not an lvalue reference; If arg is an lvalue reference, the function returns arg without modifying its type. std::forward:This is a helper function to allow perfect forwarding of arg…
std::forward argument: Returns an rvalue reference to arg if arg is not an lvalue reference; If arg is an lvalue reference, the function returns arg without modifying its type. std::forward:This is a helper function to allow perfect forwarding of arg…
class template std::function is a general-purpose polymorphic function wrapper. Instances of std::function can store, copy, and invoke any Callable target -- functions,lambda expressions, bind expressions, or other function objects, as well as pointe…
unordered map is an associative container that contains key-value pairs with unique keys. Search, insertion, and removal of elements have average constant-time complexity. Internally, the elements are not sorted in any particular order,but organized…
std::bind: Each argument may either be bound to a value or be a placeholder: (1).If bound to a value, calling the returned function object will always use that value as argument; (2).If a placeholder, calling the returned function object forwards an…
