I am trying to understand the move semantics are looking in to compiler generated move constructors (copy and assignment). In Modern Effective C++, Scott Meyers says in Item #17 that if no explicit copy constructors are declared, the the compiler will generate move constructors, which will do member-wise move for...
I have seen move semantics applied to constructors, but in this bit of code, I'm wondering if the big struct is copied entirely when returned or not. I'm not even sure it is related to move semantics. Does C++ always copies this kind of data, or is it optimized? Could...
I want to convert a temporary container to a std::map<S, T>.Let's say the temporary container is a std::unordered_map<S, T>, with T move-constructible.
This question already has an answer here:This program:correctly fails to compile on gcc because:but if you un-comment the template it happily binds and prints "Nonconst right something walk".
This question already has an answer here:Move constructor of class accepts rvalue reference which can be reference to temporary object. So, i have temporary object and appropriate move constructor which can accept reference to temporary object, but move constructor does not called. What`s wrong?
From the book: Rust won’t let us annotate a type with the Copy trait if the type, or any of its parts, has implemented the Drop trait. If the type needs something special to happen when the value goes out of scope and we add the Copy annotation to that...
I have the following factory function:In the return statement is vec considered an xvalue or prvalue and therefore moved or copy elided?
I recently started using c++ and I chose to learn c++11 features. But how c++ codes run is sometimes not so tangible.
I have seen the related questions and they mostly talk about if we should have const rvalue references as a parameter or not. But I still fail to reason why a non-const move constructor is being called in the following code:
I have seen the related questions and they mostly talk about if we should have a const ralue references as a parameter or not. But I still fail to reason why a non-const move constructor is being called in the following code